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[PATCH] ext4: initial copy of files from ext3
Start of the ext4 patch series. See Documentation/filesystems/ext4.txt for details. This is a simple copy of the files in fs/ext3 to fs/ext4 and /usr/incude/linux/ext3* to /usr/include/ex4* Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Dave Kleikamp
Linus Torvalds
parent
502717f4e1
commit
ac27a0ec11
12
fs/ext4/Makefile
Normal file
12
fs/ext4/Makefile
Normal file
@ -0,0 +1,12 @@
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#
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# Makefile for the linux ext3-filesystem routines.
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#
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obj-$(CONFIG_EXT3_FS) += ext3.o
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ext3-y := balloc.o bitmap.o dir.o file.o fsync.o ialloc.o inode.o \
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ioctl.o namei.o super.o symlink.o hash.o resize.o
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ext3-$(CONFIG_EXT3_FS_XATTR) += xattr.o xattr_user.o xattr_trusted.o
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ext3-$(CONFIG_EXT3_FS_POSIX_ACL) += acl.o
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ext3-$(CONFIG_EXT3_FS_SECURITY) += xattr_security.o
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551
fs/ext4/acl.c
Normal file
551
fs/ext4/acl.c
Normal file
@ -0,0 +1,551 @@
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/*
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* linux/fs/ext3/acl.c
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*
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* Copyright (C) 2001-2003 Andreas Gruenbacher, <agruen@suse.de>
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*/
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#include <linux/init.h>
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/capability.h>
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#include <linux/fs.h>
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#include <linux/ext3_jbd.h>
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#include <linux/ext3_fs.h>
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#include "xattr.h"
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#include "acl.h"
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/*
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* Convert from filesystem to in-memory representation.
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*/
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static struct posix_acl *
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ext3_acl_from_disk(const void *value, size_t size)
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{
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const char *end = (char *)value + size;
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int n, count;
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struct posix_acl *acl;
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if (!value)
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return NULL;
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if (size < sizeof(ext3_acl_header))
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return ERR_PTR(-EINVAL);
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if (((ext3_acl_header *)value)->a_version !=
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cpu_to_le32(EXT3_ACL_VERSION))
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return ERR_PTR(-EINVAL);
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value = (char *)value + sizeof(ext3_acl_header);
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count = ext3_acl_count(size);
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if (count < 0)
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return ERR_PTR(-EINVAL);
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if (count == 0)
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return NULL;
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acl = posix_acl_alloc(count, GFP_KERNEL);
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if (!acl)
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return ERR_PTR(-ENOMEM);
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for (n=0; n < count; n++) {
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ext3_acl_entry *entry =
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(ext3_acl_entry *)value;
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if ((char *)value + sizeof(ext3_acl_entry_short) > end)
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goto fail;
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acl->a_entries[n].e_tag = le16_to_cpu(entry->e_tag);
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acl->a_entries[n].e_perm = le16_to_cpu(entry->e_perm);
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switch(acl->a_entries[n].e_tag) {
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case ACL_USER_OBJ:
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case ACL_GROUP_OBJ:
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case ACL_MASK:
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case ACL_OTHER:
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value = (char *)value +
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sizeof(ext3_acl_entry_short);
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acl->a_entries[n].e_id = ACL_UNDEFINED_ID;
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break;
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case ACL_USER:
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case ACL_GROUP:
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value = (char *)value + sizeof(ext3_acl_entry);
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if ((char *)value > end)
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goto fail;
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acl->a_entries[n].e_id =
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le32_to_cpu(entry->e_id);
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break;
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default:
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goto fail;
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}
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}
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if (value != end)
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goto fail;
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return acl;
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fail:
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posix_acl_release(acl);
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return ERR_PTR(-EINVAL);
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}
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/*
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* Convert from in-memory to filesystem representation.
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*/
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static void *
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ext3_acl_to_disk(const struct posix_acl *acl, size_t *size)
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{
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ext3_acl_header *ext_acl;
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char *e;
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size_t n;
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*size = ext3_acl_size(acl->a_count);
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ext_acl = kmalloc(sizeof(ext3_acl_header) + acl->a_count *
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sizeof(ext3_acl_entry), GFP_KERNEL);
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if (!ext_acl)
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return ERR_PTR(-ENOMEM);
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ext_acl->a_version = cpu_to_le32(EXT3_ACL_VERSION);
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e = (char *)ext_acl + sizeof(ext3_acl_header);
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for (n=0; n < acl->a_count; n++) {
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ext3_acl_entry *entry = (ext3_acl_entry *)e;
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entry->e_tag = cpu_to_le16(acl->a_entries[n].e_tag);
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entry->e_perm = cpu_to_le16(acl->a_entries[n].e_perm);
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switch(acl->a_entries[n].e_tag) {
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case ACL_USER:
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case ACL_GROUP:
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entry->e_id =
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cpu_to_le32(acl->a_entries[n].e_id);
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e += sizeof(ext3_acl_entry);
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break;
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case ACL_USER_OBJ:
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case ACL_GROUP_OBJ:
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case ACL_MASK:
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case ACL_OTHER:
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e += sizeof(ext3_acl_entry_short);
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break;
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default:
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goto fail;
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}
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}
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return (char *)ext_acl;
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fail:
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kfree(ext_acl);
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return ERR_PTR(-EINVAL);
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}
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static inline struct posix_acl *
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ext3_iget_acl(struct inode *inode, struct posix_acl **i_acl)
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{
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struct posix_acl *acl = EXT3_ACL_NOT_CACHED;
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spin_lock(&inode->i_lock);
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if (*i_acl != EXT3_ACL_NOT_CACHED)
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acl = posix_acl_dup(*i_acl);
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spin_unlock(&inode->i_lock);
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return acl;
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}
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static inline void
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ext3_iset_acl(struct inode *inode, struct posix_acl **i_acl,
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struct posix_acl *acl)
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{
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spin_lock(&inode->i_lock);
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if (*i_acl != EXT3_ACL_NOT_CACHED)
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posix_acl_release(*i_acl);
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*i_acl = posix_acl_dup(acl);
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spin_unlock(&inode->i_lock);
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}
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/*
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* Inode operation get_posix_acl().
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*
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* inode->i_mutex: don't care
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*/
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static struct posix_acl *
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ext3_get_acl(struct inode *inode, int type)
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{
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struct ext3_inode_info *ei = EXT3_I(inode);
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int name_index;
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char *value = NULL;
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struct posix_acl *acl;
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int retval;
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if (!test_opt(inode->i_sb, POSIX_ACL))
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return NULL;
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switch(type) {
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case ACL_TYPE_ACCESS:
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acl = ext3_iget_acl(inode, &ei->i_acl);
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if (acl != EXT3_ACL_NOT_CACHED)
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return acl;
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name_index = EXT3_XATTR_INDEX_POSIX_ACL_ACCESS;
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break;
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case ACL_TYPE_DEFAULT:
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acl = ext3_iget_acl(inode, &ei->i_default_acl);
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if (acl != EXT3_ACL_NOT_CACHED)
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return acl;
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name_index = EXT3_XATTR_INDEX_POSIX_ACL_DEFAULT;
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break;
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default:
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return ERR_PTR(-EINVAL);
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}
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retval = ext3_xattr_get(inode, name_index, "", NULL, 0);
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if (retval > 0) {
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value = kmalloc(retval, GFP_KERNEL);
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if (!value)
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return ERR_PTR(-ENOMEM);
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retval = ext3_xattr_get(inode, name_index, "", value, retval);
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}
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if (retval > 0)
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acl = ext3_acl_from_disk(value, retval);
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else if (retval == -ENODATA || retval == -ENOSYS)
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acl = NULL;
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else
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acl = ERR_PTR(retval);
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kfree(value);
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if (!IS_ERR(acl)) {
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switch(type) {
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case ACL_TYPE_ACCESS:
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ext3_iset_acl(inode, &ei->i_acl, acl);
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break;
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case ACL_TYPE_DEFAULT:
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ext3_iset_acl(inode, &ei->i_default_acl, acl);
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break;
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}
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}
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return acl;
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}
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/*
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* Set the access or default ACL of an inode.
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*
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* inode->i_mutex: down unless called from ext3_new_inode
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*/
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static int
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ext3_set_acl(handle_t *handle, struct inode *inode, int type,
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struct posix_acl *acl)
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{
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struct ext3_inode_info *ei = EXT3_I(inode);
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int name_index;
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void *value = NULL;
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size_t size = 0;
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int error;
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if (S_ISLNK(inode->i_mode))
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return -EOPNOTSUPP;
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switch(type) {
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case ACL_TYPE_ACCESS:
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name_index = EXT3_XATTR_INDEX_POSIX_ACL_ACCESS;
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if (acl) {
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mode_t mode = inode->i_mode;
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error = posix_acl_equiv_mode(acl, &mode);
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if (error < 0)
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return error;
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else {
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inode->i_mode = mode;
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ext3_mark_inode_dirty(handle, inode);
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if (error == 0)
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acl = NULL;
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}
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}
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break;
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case ACL_TYPE_DEFAULT:
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name_index = EXT3_XATTR_INDEX_POSIX_ACL_DEFAULT;
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if (!S_ISDIR(inode->i_mode))
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return acl ? -EACCES : 0;
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break;
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default:
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return -EINVAL;
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}
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if (acl) {
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value = ext3_acl_to_disk(acl, &size);
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if (IS_ERR(value))
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return (int)PTR_ERR(value);
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}
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error = ext3_xattr_set_handle(handle, inode, name_index, "",
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value, size, 0);
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kfree(value);
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if (!error) {
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switch(type) {
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case ACL_TYPE_ACCESS:
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ext3_iset_acl(inode, &ei->i_acl, acl);
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break;
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case ACL_TYPE_DEFAULT:
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ext3_iset_acl(inode, &ei->i_default_acl, acl);
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break;
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}
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}
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return error;
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}
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static int
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ext3_check_acl(struct inode *inode, int mask)
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{
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struct posix_acl *acl = ext3_get_acl(inode, ACL_TYPE_ACCESS);
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if (IS_ERR(acl))
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return PTR_ERR(acl);
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if (acl) {
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int error = posix_acl_permission(inode, acl, mask);
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posix_acl_release(acl);
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return error;
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}
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return -EAGAIN;
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}
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int
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ext3_permission(struct inode *inode, int mask, struct nameidata *nd)
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{
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return generic_permission(inode, mask, ext3_check_acl);
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}
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/*
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* Initialize the ACLs of a new inode. Called from ext3_new_inode.
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*
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* dir->i_mutex: down
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* inode->i_mutex: up (access to inode is still exclusive)
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*/
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int
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ext3_init_acl(handle_t *handle, struct inode *inode, struct inode *dir)
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{
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struct posix_acl *acl = NULL;
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int error = 0;
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if (!S_ISLNK(inode->i_mode)) {
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if (test_opt(dir->i_sb, POSIX_ACL)) {
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acl = ext3_get_acl(dir, ACL_TYPE_DEFAULT);
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if (IS_ERR(acl))
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return PTR_ERR(acl);
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}
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if (!acl)
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inode->i_mode &= ~current->fs->umask;
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}
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if (test_opt(inode->i_sb, POSIX_ACL) && acl) {
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struct posix_acl *clone;
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mode_t mode;
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if (S_ISDIR(inode->i_mode)) {
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error = ext3_set_acl(handle, inode,
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ACL_TYPE_DEFAULT, acl);
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if (error)
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goto cleanup;
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}
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clone = posix_acl_clone(acl, GFP_KERNEL);
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error = -ENOMEM;
|
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if (!clone)
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goto cleanup;
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mode = inode->i_mode;
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error = posix_acl_create_masq(clone, &mode);
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if (error >= 0) {
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inode->i_mode = mode;
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if (error > 0) {
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/* This is an extended ACL */
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error = ext3_set_acl(handle, inode,
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ACL_TYPE_ACCESS, clone);
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}
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}
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posix_acl_release(clone);
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}
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cleanup:
|
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posix_acl_release(acl);
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return error;
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}
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/*
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* Does chmod for an inode that may have an Access Control List. The
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* inode->i_mode field must be updated to the desired value by the caller
|
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* before calling this function.
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* Returns 0 on success, or a negative error number.
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*
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* We change the ACL rather than storing some ACL entries in the file
|
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* mode permission bits (which would be more efficient), because that
|
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* would break once additional permissions (like ACL_APPEND, ACL_DELETE
|
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* for directories) are added. There are no more bits available in the
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* file mode.
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*
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* inode->i_mutex: down
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*/
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int
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ext3_acl_chmod(struct inode *inode)
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{
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struct posix_acl *acl, *clone;
|
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int error;
|
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|
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if (S_ISLNK(inode->i_mode))
|
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return -EOPNOTSUPP;
|
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if (!test_opt(inode->i_sb, POSIX_ACL))
|
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return 0;
|
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acl = ext3_get_acl(inode, ACL_TYPE_ACCESS);
|
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if (IS_ERR(acl) || !acl)
|
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return PTR_ERR(acl);
|
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clone = posix_acl_clone(acl, GFP_KERNEL);
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posix_acl_release(acl);
|
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if (!clone)
|
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return -ENOMEM;
|
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error = posix_acl_chmod_masq(clone, inode->i_mode);
|
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if (!error) {
|
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handle_t *handle;
|
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int retries = 0;
|
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|
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retry:
|
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handle = ext3_journal_start(inode,
|
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EXT3_DATA_TRANS_BLOCKS(inode->i_sb));
|
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if (IS_ERR(handle)) {
|
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error = PTR_ERR(handle);
|
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ext3_std_error(inode->i_sb, error);
|
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goto out;
|
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}
|
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error = ext3_set_acl(handle, inode, ACL_TYPE_ACCESS, clone);
|
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ext3_journal_stop(handle);
|
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if (error == -ENOSPC &&
|
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ext3_should_retry_alloc(inode->i_sb, &retries))
|
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goto retry;
|
||||
}
|
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out:
|
||||
posix_acl_release(clone);
|
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return error;
|
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}
|
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|
||||
/*
|
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* Extended attribute handlers
|
||||
*/
|
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static size_t
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ext3_xattr_list_acl_access(struct inode *inode, char *list, size_t list_len,
|
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const char *name, size_t name_len)
|
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{
|
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const size_t size = sizeof(POSIX_ACL_XATTR_ACCESS);
|
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|
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if (!test_opt(inode->i_sb, POSIX_ACL))
|
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return 0;
|
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if (list && size <= list_len)
|
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memcpy(list, POSIX_ACL_XATTR_ACCESS, size);
|
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return size;
|
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}
|
||||
|
||||
static size_t
|
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ext3_xattr_list_acl_default(struct inode *inode, char *list, size_t list_len,
|
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const char *name, size_t name_len)
|
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{
|
||||
const size_t size = sizeof(POSIX_ACL_XATTR_DEFAULT);
|
||||
|
||||
if (!test_opt(inode->i_sb, POSIX_ACL))
|
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return 0;
|
||||
if (list && size <= list_len)
|
||||
memcpy(list, POSIX_ACL_XATTR_DEFAULT, size);
|
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return size;
|
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}
|
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|
||||
static int
|
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ext3_xattr_get_acl(struct inode *inode, int type, void *buffer, size_t size)
|
||||
{
|
||||
struct posix_acl *acl;
|
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int error;
|
||||
|
||||
if (!test_opt(inode->i_sb, POSIX_ACL))
|
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return -EOPNOTSUPP;
|
||||
|
||||
acl = ext3_get_acl(inode, type);
|
||||
if (IS_ERR(acl))
|
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return PTR_ERR(acl);
|
||||
if (acl == NULL)
|
||||
return -ENODATA;
|
||||
error = posix_acl_to_xattr(acl, buffer, size);
|
||||
posix_acl_release(acl);
|
||||
|
||||
return error;
|
||||
}
|
||||
|
||||
static int
|
||||
ext3_xattr_get_acl_access(struct inode *inode, const char *name,
|
||||
void *buffer, size_t size)
|
||||
{
|
||||
if (strcmp(name, "") != 0)
|
||||
return -EINVAL;
|
||||
return ext3_xattr_get_acl(inode, ACL_TYPE_ACCESS, buffer, size);
|
||||
}
|
||||
|
||||
static int
|
||||
ext3_xattr_get_acl_default(struct inode *inode, const char *name,
|
||||
void *buffer, size_t size)
|
||||
{
|
||||
if (strcmp(name, "") != 0)
|
||||
return -EINVAL;
|
||||
return ext3_xattr_get_acl(inode, ACL_TYPE_DEFAULT, buffer, size);
|
||||
}
|
||||
|
||||
static int
|
||||
ext3_xattr_set_acl(struct inode *inode, int type, const void *value,
|
||||
size_t size)
|
||||
{
|
||||
handle_t *handle;
|
||||
struct posix_acl *acl;
|
||||
int error, retries = 0;
|
||||
|
||||
if (!test_opt(inode->i_sb, POSIX_ACL))
|
||||
return -EOPNOTSUPP;
|
||||
if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
|
||||
return -EPERM;
|
||||
|
||||
if (value) {
|
||||
acl = posix_acl_from_xattr(value, size);
|
||||
if (IS_ERR(acl))
|
||||
return PTR_ERR(acl);
|
||||
else if (acl) {
|
||||
error = posix_acl_valid(acl);
|
||||
if (error)
|
||||
goto release_and_out;
|
||||
}
|
||||
} else
|
||||
acl = NULL;
|
||||
|
||||
retry:
|
||||
handle = ext3_journal_start(inode, EXT3_DATA_TRANS_BLOCKS(inode->i_sb));
|
||||
if (IS_ERR(handle))
|
||||
return PTR_ERR(handle);
|
||||
error = ext3_set_acl(handle, inode, type, acl);
|
||||
ext3_journal_stop(handle);
|
||||
if (error == -ENOSPC && ext3_should_retry_alloc(inode->i_sb, &retries))
|
||||
goto retry;
|
||||
|
||||
release_and_out:
|
||||
posix_acl_release(acl);
|
||||
return error;
|
||||
}
|
||||
|
||||
static int
|
||||
ext3_xattr_set_acl_access(struct inode *inode, const char *name,
|
||||
const void *value, size_t size, int flags)
|
||||
{
|
||||
if (strcmp(name, "") != 0)
|
||||
return -EINVAL;
|
||||
return ext3_xattr_set_acl(inode, ACL_TYPE_ACCESS, value, size);
|
||||
}
|
||||
|
||||
static int
|
||||
ext3_xattr_set_acl_default(struct inode *inode, const char *name,
|
||||
const void *value, size_t size, int flags)
|
||||
{
|
||||
if (strcmp(name, "") != 0)
|
||||
return -EINVAL;
|
||||
return ext3_xattr_set_acl(inode, ACL_TYPE_DEFAULT, value, size);
|
||||
}
|
||||
|
||||
struct xattr_handler ext3_xattr_acl_access_handler = {
|
||||
.prefix = POSIX_ACL_XATTR_ACCESS,
|
||||
.list = ext3_xattr_list_acl_access,
|
||||
.get = ext3_xattr_get_acl_access,
|
||||
.set = ext3_xattr_set_acl_access,
|
||||
};
|
||||
|
||||
struct xattr_handler ext3_xattr_acl_default_handler = {
|
||||
.prefix = POSIX_ACL_XATTR_DEFAULT,
|
||||
.list = ext3_xattr_list_acl_default,
|
||||
.get = ext3_xattr_get_acl_default,
|
||||
.set = ext3_xattr_set_acl_default,
|
||||
};
|
||||
81
fs/ext4/acl.h
Normal file
81
fs/ext4/acl.h
Normal file
@ -0,0 +1,81 @@
|
||||
/*
|
||||
File: fs/ext3/acl.h
|
||||
|
||||
(C) 2001 Andreas Gruenbacher, <a.gruenbacher@computer.org>
|
||||
*/
|
||||
|
||||
#include <linux/posix_acl_xattr.h>
|
||||
|
||||
#define EXT3_ACL_VERSION 0x0001
|
||||
|
||||
typedef struct {
|
||||
__le16 e_tag;
|
||||
__le16 e_perm;
|
||||
__le32 e_id;
|
||||
} ext3_acl_entry;
|
||||
|
||||
typedef struct {
|
||||
__le16 e_tag;
|
||||
__le16 e_perm;
|
||||
} ext3_acl_entry_short;
|
||||
|
||||
typedef struct {
|
||||
__le32 a_version;
|
||||
} ext3_acl_header;
|
||||
|
||||
static inline size_t ext3_acl_size(int count)
|
||||
{
|
||||
if (count <= 4) {
|
||||
return sizeof(ext3_acl_header) +
|
||||
count * sizeof(ext3_acl_entry_short);
|
||||
} else {
|
||||
return sizeof(ext3_acl_header) +
|
||||
4 * sizeof(ext3_acl_entry_short) +
|
||||
(count - 4) * sizeof(ext3_acl_entry);
|
||||
}
|
||||
}
|
||||
|
||||
static inline int ext3_acl_count(size_t size)
|
||||
{
|
||||
ssize_t s;
|
||||
size -= sizeof(ext3_acl_header);
|
||||
s = size - 4 * sizeof(ext3_acl_entry_short);
|
||||
if (s < 0) {
|
||||
if (size % sizeof(ext3_acl_entry_short))
|
||||
return -1;
|
||||
return size / sizeof(ext3_acl_entry_short);
|
||||
} else {
|
||||
if (s % sizeof(ext3_acl_entry))
|
||||
return -1;
|
||||
return s / sizeof(ext3_acl_entry) + 4;
|
||||
}
|
||||
}
|
||||
|
||||
#ifdef CONFIG_EXT3_FS_POSIX_ACL
|
||||
|
||||
/* Value for inode->u.ext3_i.i_acl and inode->u.ext3_i.i_default_acl
|
||||
if the ACL has not been cached */
|
||||
#define EXT3_ACL_NOT_CACHED ((void *)-1)
|
||||
|
||||
/* acl.c */
|
||||
extern int ext3_permission (struct inode *, int, struct nameidata *);
|
||||
extern int ext3_acl_chmod (struct inode *);
|
||||
extern int ext3_init_acl (handle_t *, struct inode *, struct inode *);
|
||||
|
||||
#else /* CONFIG_EXT3_FS_POSIX_ACL */
|
||||
#include <linux/sched.h>
|
||||
#define ext3_permission NULL
|
||||
|
||||
static inline int
|
||||
ext3_acl_chmod(struct inode *inode)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline int
|
||||
ext3_init_acl(handle_t *handle, struct inode *inode, struct inode *dir)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
#endif /* CONFIG_EXT3_FS_POSIX_ACL */
|
||||
|
||||
1818
fs/ext4/balloc.c
Normal file
1818
fs/ext4/balloc.c
Normal file
File diff suppressed because it is too large
Load Diff
32
fs/ext4/bitmap.c
Normal file
32
fs/ext4/bitmap.c
Normal file
@ -0,0 +1,32 @@
|
||||
/*
|
||||
* linux/fs/ext3/bitmap.c
|
||||
*
|
||||
* Copyright (C) 1992, 1993, 1994, 1995
|
||||
* Remy Card (card@masi.ibp.fr)
|
||||
* Laboratoire MASI - Institut Blaise Pascal
|
||||
* Universite Pierre et Marie Curie (Paris VI)
|
||||
*/
|
||||
|
||||
#include <linux/buffer_head.h>
|
||||
#include <linux/jbd.h>
|
||||
#include <linux/ext3_fs.h>
|
||||
|
||||
#ifdef EXT3FS_DEBUG
|
||||
|
||||
static int nibblemap[] = {4, 3, 3, 2, 3, 2, 2, 1, 3, 2, 2, 1, 2, 1, 1, 0};
|
||||
|
||||
unsigned long ext3_count_free (struct buffer_head * map, unsigned int numchars)
|
||||
{
|
||||
unsigned int i;
|
||||
unsigned long sum = 0;
|
||||
|
||||
if (!map)
|
||||
return (0);
|
||||
for (i = 0; i < numchars; i++)
|
||||
sum += nibblemap[map->b_data[i] & 0xf] +
|
||||
nibblemap[(map->b_data[i] >> 4) & 0xf];
|
||||
return (sum);
|
||||
}
|
||||
|
||||
#endif /* EXT3FS_DEBUG */
|
||||
|
||||
518
fs/ext4/dir.c
Normal file
518
fs/ext4/dir.c
Normal file
@ -0,0 +1,518 @@
|
||||
/*
|
||||
* linux/fs/ext3/dir.c
|
||||
*
|
||||
* Copyright (C) 1992, 1993, 1994, 1995
|
||||
* Remy Card (card@masi.ibp.fr)
|
||||
* Laboratoire MASI - Institut Blaise Pascal
|
||||
* Universite Pierre et Marie Curie (Paris VI)
|
||||
*
|
||||
* from
|
||||
*
|
||||
* linux/fs/minix/dir.c
|
||||
*
|
||||
* Copyright (C) 1991, 1992 Linus Torvalds
|
||||
*
|
||||
* ext3 directory handling functions
|
||||
*
|
||||
* Big-endian to little-endian byte-swapping/bitmaps by
|
||||
* David S. Miller (davem@caip.rutgers.edu), 1995
|
||||
*
|
||||
* Hash Tree Directory indexing (c) 2001 Daniel Phillips
|
||||
*
|
||||
*/
|
||||
|
||||
#include <linux/fs.h>
|
||||
#include <linux/jbd.h>
|
||||
#include <linux/ext3_fs.h>
|
||||
#include <linux/buffer_head.h>
|
||||
#include <linux/smp_lock.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/rbtree.h>
|
||||
|
||||
static unsigned char ext3_filetype_table[] = {
|
||||
DT_UNKNOWN, DT_REG, DT_DIR, DT_CHR, DT_BLK, DT_FIFO, DT_SOCK, DT_LNK
|
||||
};
|
||||
|
||||
static int ext3_readdir(struct file *, void *, filldir_t);
|
||||
static int ext3_dx_readdir(struct file * filp,
|
||||
void * dirent, filldir_t filldir);
|
||||
static int ext3_release_dir (struct inode * inode,
|
||||
struct file * filp);
|
||||
|
||||
const struct file_operations ext3_dir_operations = {
|
||||
.llseek = generic_file_llseek,
|
||||
.read = generic_read_dir,
|
||||
.readdir = ext3_readdir, /* we take BKL. needed?*/
|
||||
.ioctl = ext3_ioctl, /* BKL held */
|
||||
#ifdef CONFIG_COMPAT
|
||||
.compat_ioctl = ext3_compat_ioctl,
|
||||
#endif
|
||||
.fsync = ext3_sync_file, /* BKL held */
|
||||
#ifdef CONFIG_EXT3_INDEX
|
||||
.release = ext3_release_dir,
|
||||
#endif
|
||||
};
|
||||
|
||||
|
||||
static unsigned char get_dtype(struct super_block *sb, int filetype)
|
||||
{
|
||||
if (!EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_FILETYPE) ||
|
||||
(filetype >= EXT3_FT_MAX))
|
||||
return DT_UNKNOWN;
|
||||
|
||||
return (ext3_filetype_table[filetype]);
|
||||
}
|
||||
|
||||
|
||||
int ext3_check_dir_entry (const char * function, struct inode * dir,
|
||||
struct ext3_dir_entry_2 * de,
|
||||
struct buffer_head * bh,
|
||||
unsigned long offset)
|
||||
{
|
||||
const char * error_msg = NULL;
|
||||
const int rlen = le16_to_cpu(de->rec_len);
|
||||
|
||||
if (rlen < EXT3_DIR_REC_LEN(1))
|
||||
error_msg = "rec_len is smaller than minimal";
|
||||
else if (rlen % 4 != 0)
|
||||
error_msg = "rec_len % 4 != 0";
|
||||
else if (rlen < EXT3_DIR_REC_LEN(de->name_len))
|
||||
error_msg = "rec_len is too small for name_len";
|
||||
else if (((char *) de - bh->b_data) + rlen > dir->i_sb->s_blocksize)
|
||||
error_msg = "directory entry across blocks";
|
||||
else if (le32_to_cpu(de->inode) >
|
||||
le32_to_cpu(EXT3_SB(dir->i_sb)->s_es->s_inodes_count))
|
||||
error_msg = "inode out of bounds";
|
||||
|
||||
if (error_msg != NULL)
|
||||
ext3_error (dir->i_sb, function,
|
||||
"bad entry in directory #%lu: %s - "
|
||||
"offset=%lu, inode=%lu, rec_len=%d, name_len=%d",
|
||||
dir->i_ino, error_msg, offset,
|
||||
(unsigned long) le32_to_cpu(de->inode),
|
||||
rlen, de->name_len);
|
||||
return error_msg == NULL ? 1 : 0;
|
||||
}
|
||||
|
||||
static int ext3_readdir(struct file * filp,
|
||||
void * dirent, filldir_t filldir)
|
||||
{
|
||||
int error = 0;
|
||||
unsigned long offset;
|
||||
int i, stored;
|
||||
struct ext3_dir_entry_2 *de;
|
||||
struct super_block *sb;
|
||||
int err;
|
||||
struct inode *inode = filp->f_dentry->d_inode;
|
||||
int ret = 0;
|
||||
|
||||
sb = inode->i_sb;
|
||||
|
||||
#ifdef CONFIG_EXT3_INDEX
|
||||
if (EXT3_HAS_COMPAT_FEATURE(inode->i_sb,
|
||||
EXT3_FEATURE_COMPAT_DIR_INDEX) &&
|
||||
((EXT3_I(inode)->i_flags & EXT3_INDEX_FL) ||
|
||||
((inode->i_size >> sb->s_blocksize_bits) == 1))) {
|
||||
err = ext3_dx_readdir(filp, dirent, filldir);
|
||||
if (err != ERR_BAD_DX_DIR) {
|
||||
ret = err;
|
||||
goto out;
|
||||
}
|
||||
/*
|
||||
* We don't set the inode dirty flag since it's not
|
||||
* critical that it get flushed back to the disk.
|
||||
*/
|
||||
EXT3_I(filp->f_dentry->d_inode)->i_flags &= ~EXT3_INDEX_FL;
|
||||
}
|
||||
#endif
|
||||
stored = 0;
|
||||
offset = filp->f_pos & (sb->s_blocksize - 1);
|
||||
|
||||
while (!error && !stored && filp->f_pos < inode->i_size) {
|
||||
unsigned long blk = filp->f_pos >> EXT3_BLOCK_SIZE_BITS(sb);
|
||||
struct buffer_head map_bh;
|
||||
struct buffer_head *bh = NULL;
|
||||
|
||||
map_bh.b_state = 0;
|
||||
err = ext3_get_blocks_handle(NULL, inode, blk, 1,
|
||||
&map_bh, 0, 0);
|
||||
if (err > 0) {
|
||||
page_cache_readahead(sb->s_bdev->bd_inode->i_mapping,
|
||||
&filp->f_ra,
|
||||
filp,
|
||||
map_bh.b_blocknr >>
|
||||
(PAGE_CACHE_SHIFT - inode->i_blkbits),
|
||||
1);
|
||||
bh = ext3_bread(NULL, inode, blk, 0, &err);
|
||||
}
|
||||
|
||||
/*
|
||||
* We ignore I/O errors on directories so users have a chance
|
||||
* of recovering data when there's a bad sector
|
||||
*/
|
||||
if (!bh) {
|
||||
ext3_error (sb, "ext3_readdir",
|
||||
"directory #%lu contains a hole at offset %lu",
|
||||
inode->i_ino, (unsigned long)filp->f_pos);
|
||||
filp->f_pos += sb->s_blocksize - offset;
|
||||
continue;
|
||||
}
|
||||
|
||||
revalidate:
|
||||
/* If the dir block has changed since the last call to
|
||||
* readdir(2), then we might be pointing to an invalid
|
||||
* dirent right now. Scan from the start of the block
|
||||
* to make sure. */
|
||||
if (filp->f_version != inode->i_version) {
|
||||
for (i = 0; i < sb->s_blocksize && i < offset; ) {
|
||||
de = (struct ext3_dir_entry_2 *)
|
||||
(bh->b_data + i);
|
||||
/* It's too expensive to do a full
|
||||
* dirent test each time round this
|
||||
* loop, but we do have to test at
|
||||
* least that it is non-zero. A
|
||||
* failure will be detected in the
|
||||
* dirent test below. */
|
||||
if (le16_to_cpu(de->rec_len) <
|
||||
EXT3_DIR_REC_LEN(1))
|
||||
break;
|
||||
i += le16_to_cpu(de->rec_len);
|
||||
}
|
||||
offset = i;
|
||||
filp->f_pos = (filp->f_pos & ~(sb->s_blocksize - 1))
|
||||
| offset;
|
||||
filp->f_version = inode->i_version;
|
||||
}
|
||||
|
||||
while (!error && filp->f_pos < inode->i_size
|
||||
&& offset < sb->s_blocksize) {
|
||||
de = (struct ext3_dir_entry_2 *) (bh->b_data + offset);
|
||||
if (!ext3_check_dir_entry ("ext3_readdir", inode, de,
|
||||
bh, offset)) {
|
||||
/* On error, skip the f_pos to the
|
||||
next block. */
|
||||
filp->f_pos = (filp->f_pos |
|
||||
(sb->s_blocksize - 1)) + 1;
|
||||
brelse (bh);
|
||||
ret = stored;
|
||||
goto out;
|
||||
}
|
||||
offset += le16_to_cpu(de->rec_len);
|
||||
if (le32_to_cpu(de->inode)) {
|
||||
/* We might block in the next section
|
||||
* if the data destination is
|
||||
* currently swapped out. So, use a
|
||||
* version stamp to detect whether or
|
||||
* not the directory has been modified
|
||||
* during the copy operation.
|
||||
*/
|
||||
unsigned long version = filp->f_version;
|
||||
|
||||
error = filldir(dirent, de->name,
|
||||
de->name_len,
|
||||
filp->f_pos,
|
||||
le32_to_cpu(de->inode),
|
||||
get_dtype(sb, de->file_type));
|
||||
if (error)
|
||||
break;
|
||||
if (version != filp->f_version)
|
||||
goto revalidate;
|
||||
stored ++;
|
||||
}
|
||||
filp->f_pos += le16_to_cpu(de->rec_len);
|
||||
}
|
||||
offset = 0;
|
||||
brelse (bh);
|
||||
}
|
||||
out:
|
||||
return ret;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_EXT3_INDEX
|
||||
/*
|
||||
* These functions convert from the major/minor hash to an f_pos
|
||||
* value.
|
||||
*
|
||||
* Currently we only use major hash numer. This is unfortunate, but
|
||||
* on 32-bit machines, the same VFS interface is used for lseek and
|
||||
* llseek, so if we use the 64 bit offset, then the 32-bit versions of
|
||||
* lseek/telldir/seekdir will blow out spectacularly, and from within
|
||||
* the ext2 low-level routine, we don't know if we're being called by
|
||||
* a 64-bit version of the system call or the 32-bit version of the
|
||||
* system call. Worse yet, NFSv2 only allows for a 32-bit readdir
|
||||
* cookie. Sigh.
|
||||
*/
|
||||
#define hash2pos(major, minor) (major >> 1)
|
||||
#define pos2maj_hash(pos) ((pos << 1) & 0xffffffff)
|
||||
#define pos2min_hash(pos) (0)
|
||||
|
||||
/*
|
||||
* This structure holds the nodes of the red-black tree used to store
|
||||
* the directory entry in hash order.
|
||||
*/
|
||||
struct fname {
|
||||
__u32 hash;
|
||||
__u32 minor_hash;
|
||||
struct rb_node rb_hash;
|
||||
struct fname *next;
|
||||
__u32 inode;
|
||||
__u8 name_len;
|
||||
__u8 file_type;
|
||||
char name[0];
|
||||
};
|
||||
|
||||
/*
|
||||
* This functoin implements a non-recursive way of freeing all of the
|
||||
* nodes in the red-black tree.
|
||||
*/
|
||||
static void free_rb_tree_fname(struct rb_root *root)
|
||||
{
|
||||
struct rb_node *n = root->rb_node;
|
||||
struct rb_node *parent;
|
||||
struct fname *fname;
|
||||
|
||||
while (n) {
|
||||
/* Do the node's children first */
|
||||
if ((n)->rb_left) {
|
||||
n = n->rb_left;
|
||||
continue;
|
||||
}
|
||||
if (n->rb_right) {
|
||||
n = n->rb_right;
|
||||
continue;
|
||||
}
|
||||
/*
|
||||
* The node has no children; free it, and then zero
|
||||
* out parent's link to it. Finally go to the
|
||||
* beginning of the loop and try to free the parent
|
||||
* node.
|
||||
*/
|
||||
parent = rb_parent(n);
|
||||
fname = rb_entry(n, struct fname, rb_hash);
|
||||
while (fname) {
|
||||
struct fname * old = fname;
|
||||
fname = fname->next;
|
||||
kfree (old);
|
||||
}
|
||||
if (!parent)
|
||||
root->rb_node = NULL;
|
||||
else if (parent->rb_left == n)
|
||||
parent->rb_left = NULL;
|
||||
else if (parent->rb_right == n)
|
||||
parent->rb_right = NULL;
|
||||
n = parent;
|
||||
}
|
||||
root->rb_node = NULL;
|
||||
}
|
||||
|
||||
|
||||
static struct dir_private_info *create_dir_info(loff_t pos)
|
||||
{
|
||||
struct dir_private_info *p;
|
||||
|
||||
p = kmalloc(sizeof(struct dir_private_info), GFP_KERNEL);
|
||||
if (!p)
|
||||
return NULL;
|
||||
p->root.rb_node = NULL;
|
||||
p->curr_node = NULL;
|
||||
p->extra_fname = NULL;
|
||||
p->last_pos = 0;
|
||||
p->curr_hash = pos2maj_hash(pos);
|
||||
p->curr_minor_hash = pos2min_hash(pos);
|
||||
p->next_hash = 0;
|
||||
return p;
|
||||
}
|
||||
|
||||
void ext3_htree_free_dir_info(struct dir_private_info *p)
|
||||
{
|
||||
free_rb_tree_fname(&p->root);
|
||||
kfree(p);
|
||||
}
|
||||
|
||||
/*
|
||||
* Given a directory entry, enter it into the fname rb tree.
|
||||
*/
|
||||
int ext3_htree_store_dirent(struct file *dir_file, __u32 hash,
|
||||
__u32 minor_hash,
|
||||
struct ext3_dir_entry_2 *dirent)
|
||||
{
|
||||
struct rb_node **p, *parent = NULL;
|
||||
struct fname * fname, *new_fn;
|
||||
struct dir_private_info *info;
|
||||
int len;
|
||||
|
||||
info = (struct dir_private_info *) dir_file->private_data;
|
||||
p = &info->root.rb_node;
|
||||
|
||||
/* Create and allocate the fname structure */
|
||||
len = sizeof(struct fname) + dirent->name_len + 1;
|
||||
new_fn = kzalloc(len, GFP_KERNEL);
|
||||
if (!new_fn)
|
||||
return -ENOMEM;
|
||||
new_fn->hash = hash;
|
||||
new_fn->minor_hash = minor_hash;
|
||||
new_fn->inode = le32_to_cpu(dirent->inode);
|
||||
new_fn->name_len = dirent->name_len;
|
||||
new_fn->file_type = dirent->file_type;
|
||||
memcpy(new_fn->name, dirent->name, dirent->name_len);
|
||||
new_fn->name[dirent->name_len] = 0;
|
||||
|
||||
while (*p) {
|
||||
parent = *p;
|
||||
fname = rb_entry(parent, struct fname, rb_hash);
|
||||
|
||||
/*
|
||||
* If the hash and minor hash match up, then we put
|
||||
* them on a linked list. This rarely happens...
|
||||
*/
|
||||
if ((new_fn->hash == fname->hash) &&
|
||||
(new_fn->minor_hash == fname->minor_hash)) {
|
||||
new_fn->next = fname->next;
|
||||
fname->next = new_fn;
|
||||
return 0;
|
||||
}
|
||||
|
||||
if (new_fn->hash < fname->hash)
|
||||
p = &(*p)->rb_left;
|
||||
else if (new_fn->hash > fname->hash)
|
||||
p = &(*p)->rb_right;
|
||||
else if (new_fn->minor_hash < fname->minor_hash)
|
||||
p = &(*p)->rb_left;
|
||||
else /* if (new_fn->minor_hash > fname->minor_hash) */
|
||||
p = &(*p)->rb_right;
|
||||
}
|
||||
|
||||
rb_link_node(&new_fn->rb_hash, parent, p);
|
||||
rb_insert_color(&new_fn->rb_hash, &info->root);
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
|
||||
/*
|
||||
* This is a helper function for ext3_dx_readdir. It calls filldir
|
||||
* for all entres on the fname linked list. (Normally there is only
|
||||
* one entry on the linked list, unless there are 62 bit hash collisions.)
|
||||
*/
|
||||
static int call_filldir(struct file * filp, void * dirent,
|
||||
filldir_t filldir, struct fname *fname)
|
||||
{
|
||||
struct dir_private_info *info = filp->private_data;
|
||||
loff_t curr_pos;
|
||||
struct inode *inode = filp->f_dentry->d_inode;
|
||||
struct super_block * sb;
|
||||
int error;
|
||||
|
||||
sb = inode->i_sb;
|
||||
|
||||
if (!fname) {
|
||||
printk("call_filldir: called with null fname?!?\n");
|
||||
return 0;
|
||||
}
|
||||
curr_pos = hash2pos(fname->hash, fname->minor_hash);
|
||||
while (fname) {
|
||||
error = filldir(dirent, fname->name,
|
||||
fname->name_len, curr_pos,
|
||||
fname->inode,
|
||||
get_dtype(sb, fname->file_type));
|
||||
if (error) {
|
||||
filp->f_pos = curr_pos;
|
||||
info->extra_fname = fname->next;
|
||||
return error;
|
||||
}
|
||||
fname = fname->next;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int ext3_dx_readdir(struct file * filp,
|
||||
void * dirent, filldir_t filldir)
|
||||
{
|
||||
struct dir_private_info *info = filp->private_data;
|
||||
struct inode *inode = filp->f_dentry->d_inode;
|
||||
struct fname *fname;
|
||||
int ret;
|
||||
|
||||
if (!info) {
|
||||
info = create_dir_info(filp->f_pos);
|
||||
if (!info)
|
||||
return -ENOMEM;
|
||||
filp->private_data = info;
|
||||
}
|
||||
|
||||
if (filp->f_pos == EXT3_HTREE_EOF)
|
||||
return 0; /* EOF */
|
||||
|
||||
/* Some one has messed with f_pos; reset the world */
|
||||
if (info->last_pos != filp->f_pos) {
|
||||
free_rb_tree_fname(&info->root);
|
||||
info->curr_node = NULL;
|
||||
info->extra_fname = NULL;
|
||||
info->curr_hash = pos2maj_hash(filp->f_pos);
|
||||
info->curr_minor_hash = pos2min_hash(filp->f_pos);
|
||||
}
|
||||
|
||||
/*
|
||||
* If there are any leftover names on the hash collision
|
||||
* chain, return them first.
|
||||
*/
|
||||
if (info->extra_fname &&
|
||||
call_filldir(filp, dirent, filldir, info->extra_fname))
|
||||
goto finished;
|
||||
|
||||
if (!info->curr_node)
|
||||
info->curr_node = rb_first(&info->root);
|
||||
|
||||
while (1) {
|
||||
/*
|
||||
* Fill the rbtree if we have no more entries,
|
||||
* or the inode has changed since we last read in the
|
||||
* cached entries.
|
||||
*/
|
||||
if ((!info->curr_node) ||
|
||||
(filp->f_version != inode->i_version)) {
|
||||
info->curr_node = NULL;
|
||||
free_rb_tree_fname(&info->root);
|
||||
filp->f_version = inode->i_version;
|
||||
ret = ext3_htree_fill_tree(filp, info->curr_hash,
|
||||
info->curr_minor_hash,
|
||||
&info->next_hash);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
if (ret == 0) {
|
||||
filp->f_pos = EXT3_HTREE_EOF;
|
||||
break;
|
||||
}
|
||||
info->curr_node = rb_first(&info->root);
|
||||
}
|
||||
|
||||
fname = rb_entry(info->curr_node, struct fname, rb_hash);
|
||||
info->curr_hash = fname->hash;
|
||||
info->curr_minor_hash = fname->minor_hash;
|
||||
if (call_filldir(filp, dirent, filldir, fname))
|
||||
break;
|
||||
|
||||
info->curr_node = rb_next(info->curr_node);
|
||||
if (!info->curr_node) {
|
||||
if (info->next_hash == ~0) {
|
||||
filp->f_pos = EXT3_HTREE_EOF;
|
||||
break;
|
||||
}
|
||||
info->curr_hash = info->next_hash;
|
||||
info->curr_minor_hash = 0;
|
||||
}
|
||||
}
|
||||
finished:
|
||||
info->last_pos = filp->f_pos;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int ext3_release_dir (struct inode * inode, struct file * filp)
|
||||
{
|
||||
if (filp->private_data)
|
||||
ext3_htree_free_dir_info(filp->private_data);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
#endif
|
||||
139
fs/ext4/file.c
Normal file
139
fs/ext4/file.c
Normal file
@ -0,0 +1,139 @@
|
||||
/*
|
||||
* linux/fs/ext3/file.c
|
||||
*
|
||||
* Copyright (C) 1992, 1993, 1994, 1995
|
||||
* Remy Card (card@masi.ibp.fr)
|
||||
* Laboratoire MASI - Institut Blaise Pascal
|
||||
* Universite Pierre et Marie Curie (Paris VI)
|
||||
*
|
||||
* from
|
||||
*
|
||||
* linux/fs/minix/file.c
|
||||
*
|
||||
* Copyright (C) 1991, 1992 Linus Torvalds
|
||||
*
|
||||
* ext3 fs regular file handling primitives
|
||||
*
|
||||
* 64-bit file support on 64-bit platforms by Jakub Jelinek
|
||||
* (jj@sunsite.ms.mff.cuni.cz)
|
||||
*/
|
||||
|
||||
#include <linux/time.h>
|
||||
#include <linux/fs.h>
|
||||
#include <linux/jbd.h>
|
||||
#include <linux/ext3_fs.h>
|
||||
#include <linux/ext3_jbd.h>
|
||||
#include "xattr.h"
|
||||
#include "acl.h"
|
||||
|
||||
/*
|
||||
* Called when an inode is released. Note that this is different
|
||||
* from ext3_file_open: open gets called at every open, but release
|
||||
* gets called only when /all/ the files are closed.
|
||||
*/
|
||||
static int ext3_release_file (struct inode * inode, struct file * filp)
|
||||
{
|
||||
/* if we are the last writer on the inode, drop the block reservation */
|
||||
if ((filp->f_mode & FMODE_WRITE) &&
|
||||
(atomic_read(&inode->i_writecount) == 1))
|
||||
{
|
||||
mutex_lock(&EXT3_I(inode)->truncate_mutex);
|
||||
ext3_discard_reservation(inode);
|
||||
mutex_unlock(&EXT3_I(inode)->truncate_mutex);
|
||||
}
|
||||
if (is_dx(inode) && filp->private_data)
|
||||
ext3_htree_free_dir_info(filp->private_data);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static ssize_t
|
||||
ext3_file_write(struct kiocb *iocb, const struct iovec *iov,
|
||||
unsigned long nr_segs, loff_t pos)
|
||||
{
|
||||
struct file *file = iocb->ki_filp;
|
||||
struct inode *inode = file->f_dentry->d_inode;
|
||||
ssize_t ret;
|
||||
int err;
|
||||
|
||||
ret = generic_file_aio_write(iocb, iov, nr_segs, pos);
|
||||
|
||||
/*
|
||||
* Skip flushing if there was an error, or if nothing was written.
|
||||
*/
|
||||
if (ret <= 0)
|
||||
return ret;
|
||||
|
||||
/*
|
||||
* If the inode is IS_SYNC, or is O_SYNC and we are doing data
|
||||
* journalling then we need to make sure that we force the transaction
|
||||
* to disk to keep all metadata uptodate synchronously.
|
||||
*/
|
||||
if (file->f_flags & O_SYNC) {
|
||||
/*
|
||||
* If we are non-data-journaled, then the dirty data has
|
||||
* already been flushed to backing store by generic_osync_inode,
|
||||
* and the inode has been flushed too if there have been any
|
||||
* modifications other than mere timestamp updates.
|
||||
*
|
||||
* Open question --- do we care about flushing timestamps too
|
||||
* if the inode is IS_SYNC?
|
||||
*/
|
||||
if (!ext3_should_journal_data(inode))
|
||||
return ret;
|
||||
|
||||
goto force_commit;
|
||||
}
|
||||
|
||||
/*
|
||||
* So we know that there has been no forced data flush. If the inode
|
||||
* is marked IS_SYNC, we need to force one ourselves.
|
||||
*/
|
||||
if (!IS_SYNC(inode))
|
||||
return ret;
|
||||
|
||||
/*
|
||||
* Open question #2 --- should we force data to disk here too? If we
|
||||
* don't, the only impact is that data=writeback filesystems won't
|
||||
* flush data to disk automatically on IS_SYNC, only metadata (but
|
||||
* historically, that is what ext2 has done.)
|
||||
*/
|
||||
|
||||
force_commit:
|
||||
err = ext3_force_commit(inode->i_sb);
|
||||
if (err)
|
||||
return err;
|
||||
return ret;
|
||||
}
|
||||
|
||||
const struct file_operations ext3_file_operations = {
|
||||
.llseek = generic_file_llseek,
|
||||
.read = do_sync_read,
|
||||
.write = do_sync_write,
|
||||
.aio_read = generic_file_aio_read,
|
||||
.aio_write = ext3_file_write,
|
||||
.ioctl = ext3_ioctl,
|
||||
#ifdef CONFIG_COMPAT
|
||||
.compat_ioctl = ext3_compat_ioctl,
|
||||
#endif
|
||||
.mmap = generic_file_mmap,
|
||||
.open = generic_file_open,
|
||||
.release = ext3_release_file,
|
||||
.fsync = ext3_sync_file,
|
||||
.sendfile = generic_file_sendfile,
|
||||
.splice_read = generic_file_splice_read,
|
||||
.splice_write = generic_file_splice_write,
|
||||
};
|
||||
|
||||
struct inode_operations ext3_file_inode_operations = {
|
||||
.truncate = ext3_truncate,
|
||||
.setattr = ext3_setattr,
|
||||
#ifdef CONFIG_EXT3_FS_XATTR
|
||||
.setxattr = generic_setxattr,
|
||||
.getxattr = generic_getxattr,
|
||||
.listxattr = ext3_listxattr,
|
||||
.removexattr = generic_removexattr,
|
||||
#endif
|
||||
.permission = ext3_permission,
|
||||
};
|
||||
|
||||
88
fs/ext4/fsync.c
Normal file
88
fs/ext4/fsync.c
Normal file
@ -0,0 +1,88 @@
|
||||
/*
|
||||
* linux/fs/ext3/fsync.c
|
||||
*
|
||||
* Copyright (C) 1993 Stephen Tweedie (sct@redhat.com)
|
||||
* from
|
||||
* Copyright (C) 1992 Remy Card (card@masi.ibp.fr)
|
||||
* Laboratoire MASI - Institut Blaise Pascal
|
||||
* Universite Pierre et Marie Curie (Paris VI)
|
||||
* from
|
||||
* linux/fs/minix/truncate.c Copyright (C) 1991, 1992 Linus Torvalds
|
||||
*
|
||||
* ext3fs fsync primitive
|
||||
*
|
||||
* Big-endian to little-endian byte-swapping/bitmaps by
|
||||
* David S. Miller (davem@caip.rutgers.edu), 1995
|
||||
*
|
||||
* Removed unnecessary code duplication for little endian machines
|
||||
* and excessive __inline__s.
|
||||
* Andi Kleen, 1997
|
||||
*
|
||||
* Major simplications and cleanup - we only need to do the metadata, because
|
||||
* we can depend on generic_block_fdatasync() to sync the data blocks.
|
||||
*/
|
||||
|
||||
#include <linux/time.h>
|
||||
#include <linux/fs.h>
|
||||
#include <linux/sched.h>
|
||||
#include <linux/writeback.h>
|
||||
#include <linux/jbd.h>
|
||||
#include <linux/ext3_fs.h>
|
||||
#include <linux/ext3_jbd.h>
|
||||
|
||||
/*
|
||||
* akpm: A new design for ext3_sync_file().
|
||||
*
|
||||
* This is only called from sys_fsync(), sys_fdatasync() and sys_msync().
|
||||
* There cannot be a transaction open by this task.
|
||||
* Another task could have dirtied this inode. Its data can be in any
|
||||
* state in the journalling system.
|
||||
*
|
||||
* What we do is just kick off a commit and wait on it. This will snapshot the
|
||||
* inode to disk.
|
||||
*/
|
||||
|
||||
int ext3_sync_file(struct file * file, struct dentry *dentry, int datasync)
|
||||
{
|
||||
struct inode *inode = dentry->d_inode;
|
||||
int ret = 0;
|
||||
|
||||
J_ASSERT(ext3_journal_current_handle() == 0);
|
||||
|
||||
/*
|
||||
* data=writeback:
|
||||
* The caller's filemap_fdatawrite()/wait will sync the data.
|
||||
* sync_inode() will sync the metadata
|
||||
*
|
||||
* data=ordered:
|
||||
* The caller's filemap_fdatawrite() will write the data and
|
||||
* sync_inode() will write the inode if it is dirty. Then the caller's
|
||||
* filemap_fdatawait() will wait on the pages.
|
||||
*
|
||||
* data=journal:
|
||||
* filemap_fdatawrite won't do anything (the buffers are clean).
|
||||
* ext3_force_commit will write the file data into the journal and
|
||||
* will wait on that.
|
||||
* filemap_fdatawait() will encounter a ton of newly-dirtied pages
|
||||
* (they were dirtied by commit). But that's OK - the blocks are
|
||||
* safe in-journal, which is all fsync() needs to ensure.
|
||||
*/
|
||||
if (ext3_should_journal_data(inode)) {
|
||||
ret = ext3_force_commit(inode->i_sb);
|
||||
goto out;
|
||||
}
|
||||
|
||||
/*
|
||||
* The VFS has written the file data. If the inode is unaltered
|
||||
* then we need not start a commit.
|
||||
*/
|
||||
if (inode->i_state & (I_DIRTY_SYNC|I_DIRTY_DATASYNC)) {
|
||||
struct writeback_control wbc = {
|
||||
.sync_mode = WB_SYNC_ALL,
|
||||
.nr_to_write = 0, /* sys_fsync did this */
|
||||
};
|
||||
ret = sync_inode(inode, &wbc);
|
||||
}
|
||||
out:
|
||||
return ret;
|
||||
}
|
||||
152
fs/ext4/hash.c
Normal file
152
fs/ext4/hash.c
Normal file
@ -0,0 +1,152 @@
|
||||
/*
|
||||
* linux/fs/ext3/hash.c
|
||||
*
|
||||
* Copyright (C) 2002 by Theodore Ts'o
|
||||
*
|
||||
* This file is released under the GPL v2.
|
||||
*
|
||||
* This file may be redistributed under the terms of the GNU Public
|
||||
* License.
|
||||
*/
|
||||
|
||||
#include <linux/fs.h>
|
||||
#include <linux/jbd.h>
|
||||
#include <linux/sched.h>
|
||||
#include <linux/ext3_fs.h>
|
||||
#include <linux/cryptohash.h>
|
||||
|
||||
#define DELTA 0x9E3779B9
|
||||
|
||||
static void TEA_transform(__u32 buf[4], __u32 const in[])
|
||||
{
|
||||
__u32 sum = 0;
|
||||
__u32 b0 = buf[0], b1 = buf[1];
|
||||
__u32 a = in[0], b = in[1], c = in[2], d = in[3];
|
||||
int n = 16;
|
||||
|
||||
do {
|
||||
sum += DELTA;
|
||||
b0 += ((b1 << 4)+a) ^ (b1+sum) ^ ((b1 >> 5)+b);
|
||||
b1 += ((b0 << 4)+c) ^ (b0+sum) ^ ((b0 >> 5)+d);
|
||||
} while(--n);
|
||||
|
||||
buf[0] += b0;
|
||||
buf[1] += b1;
|
||||
}
|
||||
|
||||
|
||||
/* The old legacy hash */
|
||||
static __u32 dx_hack_hash (const char *name, int len)
|
||||
{
|
||||
__u32 hash0 = 0x12a3fe2d, hash1 = 0x37abe8f9;
|
||||
while (len--) {
|
||||
__u32 hash = hash1 + (hash0 ^ (*name++ * 7152373));
|
||||
|
||||
if (hash & 0x80000000) hash -= 0x7fffffff;
|
||||
hash1 = hash0;
|
||||
hash0 = hash;
|
||||
}
|
||||
return (hash0 << 1);
|
||||
}
|
||||
|
||||
static void str2hashbuf(const char *msg, int len, __u32 *buf, int num)
|
||||
{
|
||||
__u32 pad, val;
|
||||
int i;
|
||||
|
||||
pad = (__u32)len | ((__u32)len << 8);
|
||||
pad |= pad << 16;
|
||||
|
||||
val = pad;
|
||||
if (len > num*4)
|
||||
len = num * 4;
|
||||
for (i=0; i < len; i++) {
|
||||
if ((i % 4) == 0)
|
||||
val = pad;
|
||||
val = msg[i] + (val << 8);
|
||||
if ((i % 4) == 3) {
|
||||
*buf++ = val;
|
||||
val = pad;
|
||||
num--;
|
||||
}
|
||||
}
|
||||
if (--num >= 0)
|
||||
*buf++ = val;
|
||||
while (--num >= 0)
|
||||
*buf++ = pad;
|
||||
}
|
||||
|
||||
/*
|
||||
* Returns the hash of a filename. If len is 0 and name is NULL, then
|
||||
* this function can be used to test whether or not a hash version is
|
||||
* supported.
|
||||
*
|
||||
* The seed is an 4 longword (32 bits) "secret" which can be used to
|
||||
* uniquify a hash. If the seed is all zero's, then some default seed
|
||||
* may be used.
|
||||
*
|
||||
* A particular hash version specifies whether or not the seed is
|
||||
* represented, and whether or not the returned hash is 32 bits or 64
|
||||
* bits. 32 bit hashes will return 0 for the minor hash.
|
||||
*/
|
||||
int ext3fs_dirhash(const char *name, int len, struct dx_hash_info *hinfo)
|
||||
{
|
||||
__u32 hash;
|
||||
__u32 minor_hash = 0;
|
||||
const char *p;
|
||||
int i;
|
||||
__u32 in[8], buf[4];
|
||||
|
||||
/* Initialize the default seed for the hash checksum functions */
|
||||
buf[0] = 0x67452301;
|
||||
buf[1] = 0xefcdab89;
|
||||
buf[2] = 0x98badcfe;
|
||||
buf[3] = 0x10325476;
|
||||
|
||||
/* Check to see if the seed is all zero's */
|
||||
if (hinfo->seed) {
|
||||
for (i=0; i < 4; i++) {
|
||||
if (hinfo->seed[i])
|
||||
break;
|
||||
}
|
||||
if (i < 4)
|
||||
memcpy(buf, hinfo->seed, sizeof(buf));
|
||||
}
|
||||
|
||||
switch (hinfo->hash_version) {
|
||||
case DX_HASH_LEGACY:
|
||||
hash = dx_hack_hash(name, len);
|
||||
break;
|
||||
case DX_HASH_HALF_MD4:
|
||||
p = name;
|
||||
while (len > 0) {
|
||||
str2hashbuf(p, len, in, 8);
|
||||
half_md4_transform(buf, in);
|
||||
len -= 32;
|
||||
p += 32;
|
||||
}
|
||||
minor_hash = buf[2];
|
||||
hash = buf[1];
|
||||
break;
|
||||
case DX_HASH_TEA:
|
||||
p = name;
|
||||
while (len > 0) {
|
||||
str2hashbuf(p, len, in, 4);
|
||||
TEA_transform(buf, in);
|
||||
len -= 16;
|
||||
p += 16;
|
||||
}
|
||||
hash = buf[0];
|
||||
minor_hash = buf[1];
|
||||
break;
|
||||
default:
|
||||
hinfo->hash = 0;
|
||||
return -1;
|
||||
}
|
||||
hash = hash & ~1;
|
||||
if (hash == (EXT3_HTREE_EOF << 1))
|
||||
hash = (EXT3_HTREE_EOF-1) << 1;
|
||||
hinfo->hash = hash;
|
||||
hinfo->minor_hash = minor_hash;
|
||||
return 0;
|
||||
}
|
||||
758
fs/ext4/ialloc.c
Normal file
758
fs/ext4/ialloc.c
Normal file
@ -0,0 +1,758 @@
|
||||
/*
|
||||
* linux/fs/ext3/ialloc.c
|
||||
*
|
||||
* Copyright (C) 1992, 1993, 1994, 1995
|
||||
* Remy Card (card@masi.ibp.fr)
|
||||
* Laboratoire MASI - Institut Blaise Pascal
|
||||
* Universite Pierre et Marie Curie (Paris VI)
|
||||
*
|
||||
* BSD ufs-inspired inode and directory allocation by
|
||||
* Stephen Tweedie (sct@redhat.com), 1993
|
||||
* Big-endian to little-endian byte-swapping/bitmaps by
|
||||
* David S. Miller (davem@caip.rutgers.edu), 1995
|
||||
*/
|
||||
|
||||
#include <linux/time.h>
|
||||
#include <linux/fs.h>
|
||||
#include <linux/jbd.h>
|
||||
#include <linux/ext3_fs.h>
|
||||
#include <linux/ext3_jbd.h>
|
||||
#include <linux/stat.h>
|
||||
#include <linux/string.h>
|
||||
#include <linux/quotaops.h>
|
||||
#include <linux/buffer_head.h>
|
||||
#include <linux/random.h>
|
||||
#include <linux/bitops.h>
|
||||
|
||||
#include <asm/byteorder.h>
|
||||
|
||||
#include "xattr.h"
|
||||
#include "acl.h"
|
||||
|
||||
/*
|
||||
* ialloc.c contains the inodes allocation and deallocation routines
|
||||
*/
|
||||
|
||||
/*
|
||||
* The free inodes are managed by bitmaps. A file system contains several
|
||||
* blocks groups. Each group contains 1 bitmap block for blocks, 1 bitmap
|
||||
* block for inodes, N blocks for the inode table and data blocks.
|
||||
*
|
||||
* The file system contains group descriptors which are located after the
|
||||
* super block. Each descriptor contains the number of the bitmap block and
|
||||
* the free blocks count in the block.
|
||||
*/
|
||||
|
||||
|
||||
/*
|
||||
* Read the inode allocation bitmap for a given block_group, reading
|
||||
* into the specified slot in the superblock's bitmap cache.
|
||||
*
|
||||
* Return buffer_head of bitmap on success or NULL.
|
||||
*/
|
||||
static struct buffer_head *
|
||||
read_inode_bitmap(struct super_block * sb, unsigned long block_group)
|
||||
{
|
||||
struct ext3_group_desc *desc;
|
||||
struct buffer_head *bh = NULL;
|
||||
|
||||
desc = ext3_get_group_desc(sb, block_group, NULL);
|
||||
if (!desc)
|
||||
goto error_out;
|
||||
|
||||
bh = sb_bread(sb, le32_to_cpu(desc->bg_inode_bitmap));
|
||||
if (!bh)
|
||||
ext3_error(sb, "read_inode_bitmap",
|
||||
"Cannot read inode bitmap - "
|
||||
"block_group = %lu, inode_bitmap = %u",
|
||||
block_group, le32_to_cpu(desc->bg_inode_bitmap));
|
||||
error_out:
|
||||
return bh;
|
||||
}
|
||||
|
||||
/*
|
||||
* NOTE! When we get the inode, we're the only people
|
||||
* that have access to it, and as such there are no
|
||||
* race conditions we have to worry about. The inode
|
||||
* is not on the hash-lists, and it cannot be reached
|
||||
* through the filesystem because the directory entry
|
||||
* has been deleted earlier.
|
||||
*
|
||||
* HOWEVER: we must make sure that we get no aliases,
|
||||
* which means that we have to call "clear_inode()"
|
||||
* _before_ we mark the inode not in use in the inode
|
||||
* bitmaps. Otherwise a newly created file might use
|
||||
* the same inode number (not actually the same pointer
|
||||
* though), and then we'd have two inodes sharing the
|
||||
* same inode number and space on the harddisk.
|
||||
*/
|
||||
void ext3_free_inode (handle_t *handle, struct inode * inode)
|
||||
{
|
||||
struct super_block * sb = inode->i_sb;
|
||||
int is_directory;
|
||||
unsigned long ino;
|
||||
struct buffer_head *bitmap_bh = NULL;
|
||||
struct buffer_head *bh2;
|
||||
unsigned long block_group;
|
||||
unsigned long bit;
|
||||
struct ext3_group_desc * gdp;
|
||||
struct ext3_super_block * es;
|
||||
struct ext3_sb_info *sbi;
|
||||
int fatal = 0, err;
|
||||
|
||||
if (atomic_read(&inode->i_count) > 1) {
|
||||
printk ("ext3_free_inode: inode has count=%d\n",
|
||||
atomic_read(&inode->i_count));
|
||||
return;
|
||||
}
|
||||
if (inode->i_nlink) {
|
||||
printk ("ext3_free_inode: inode has nlink=%d\n",
|
||||
inode->i_nlink);
|
||||
return;
|
||||
}
|
||||
if (!sb) {
|
||||
printk("ext3_free_inode: inode on nonexistent device\n");
|
||||
return;
|
||||
}
|
||||
sbi = EXT3_SB(sb);
|
||||
|
||||
ino = inode->i_ino;
|
||||
ext3_debug ("freeing inode %lu\n", ino);
|
||||
|
||||
/*
|
||||
* Note: we must free any quota before locking the superblock,
|
||||
* as writing the quota to disk may need the lock as well.
|
||||
*/
|
||||
DQUOT_INIT(inode);
|
||||
ext3_xattr_delete_inode(handle, inode);
|
||||
DQUOT_FREE_INODE(inode);
|
||||
DQUOT_DROP(inode);
|
||||
|
||||
is_directory = S_ISDIR(inode->i_mode);
|
||||
|
||||
/* Do this BEFORE marking the inode not in use or returning an error */
|
||||
clear_inode (inode);
|
||||
|
||||
es = EXT3_SB(sb)->s_es;
|
||||
if (ino < EXT3_FIRST_INO(sb) || ino > le32_to_cpu(es->s_inodes_count)) {
|
||||
ext3_error (sb, "ext3_free_inode",
|
||||
"reserved or nonexistent inode %lu", ino);
|
||||
goto error_return;
|
||||
}
|
||||
block_group = (ino - 1) / EXT3_INODES_PER_GROUP(sb);
|
||||
bit = (ino - 1) % EXT3_INODES_PER_GROUP(sb);
|
||||
bitmap_bh = read_inode_bitmap(sb, block_group);
|
||||
if (!bitmap_bh)
|
||||
goto error_return;
|
||||
|
||||
BUFFER_TRACE(bitmap_bh, "get_write_access");
|
||||
fatal = ext3_journal_get_write_access(handle, bitmap_bh);
|
||||
if (fatal)
|
||||
goto error_return;
|
||||
|
||||
/* Ok, now we can actually update the inode bitmaps.. */
|
||||
if (!ext3_clear_bit_atomic(sb_bgl_lock(sbi, block_group),
|
||||
bit, bitmap_bh->b_data))
|
||||
ext3_error (sb, "ext3_free_inode",
|
||||
"bit already cleared for inode %lu", ino);
|
||||
else {
|
||||
gdp = ext3_get_group_desc (sb, block_group, &bh2);
|
||||
|
||||
BUFFER_TRACE(bh2, "get_write_access");
|
||||
fatal = ext3_journal_get_write_access(handle, bh2);
|
||||
if (fatal) goto error_return;
|
||||
|
||||
if (gdp) {
|
||||
spin_lock(sb_bgl_lock(sbi, block_group));
|
||||
gdp->bg_free_inodes_count = cpu_to_le16(
|
||||
le16_to_cpu(gdp->bg_free_inodes_count) + 1);
|
||||
if (is_directory)
|
||||
gdp->bg_used_dirs_count = cpu_to_le16(
|
||||
le16_to_cpu(gdp->bg_used_dirs_count) - 1);
|
||||
spin_unlock(sb_bgl_lock(sbi, block_group));
|
||||
percpu_counter_inc(&sbi->s_freeinodes_counter);
|
||||
if (is_directory)
|
||||
percpu_counter_dec(&sbi->s_dirs_counter);
|
||||
|
||||
}
|
||||
BUFFER_TRACE(bh2, "call ext3_journal_dirty_metadata");
|
||||
err = ext3_journal_dirty_metadata(handle, bh2);
|
||||
if (!fatal) fatal = err;
|
||||
}
|
||||
BUFFER_TRACE(bitmap_bh, "call ext3_journal_dirty_metadata");
|
||||
err = ext3_journal_dirty_metadata(handle, bitmap_bh);
|
||||
if (!fatal)
|
||||
fatal = err;
|
||||
sb->s_dirt = 1;
|
||||
error_return:
|
||||
brelse(bitmap_bh);
|
||||
ext3_std_error(sb, fatal);
|
||||
}
|
||||
|
||||
/*
|
||||
* There are two policies for allocating an inode. If the new inode is
|
||||
* a directory, then a forward search is made for a block group with both
|
||||
* free space and a low directory-to-inode ratio; if that fails, then of
|
||||
* the groups with above-average free space, that group with the fewest
|
||||
* directories already is chosen.
|
||||
*
|
||||
* For other inodes, search forward from the parent directory\'s block
|
||||
* group to find a free inode.
|
||||
*/
|
||||
static int find_group_dir(struct super_block *sb, struct inode *parent)
|
||||
{
|
||||
int ngroups = EXT3_SB(sb)->s_groups_count;
|
||||
unsigned int freei, avefreei;
|
||||
struct ext3_group_desc *desc, *best_desc = NULL;
|
||||
struct buffer_head *bh;
|
||||
int group, best_group = -1;
|
||||
|
||||
freei = percpu_counter_read_positive(&EXT3_SB(sb)->s_freeinodes_counter);
|
||||
avefreei = freei / ngroups;
|
||||
|
||||
for (group = 0; group < ngroups; group++) {
|
||||
desc = ext3_get_group_desc (sb, group, &bh);
|
||||
if (!desc || !desc->bg_free_inodes_count)
|
||||
continue;
|
||||
if (le16_to_cpu(desc->bg_free_inodes_count) < avefreei)
|
||||
continue;
|
||||
if (!best_desc ||
|
||||
(le16_to_cpu(desc->bg_free_blocks_count) >
|
||||
le16_to_cpu(best_desc->bg_free_blocks_count))) {
|
||||
best_group = group;
|
||||
best_desc = desc;
|
||||
}
|
||||
}
|
||||
return best_group;
|
||||
}
|
||||
|
||||
/*
|
||||
* Orlov's allocator for directories.
|
||||
*
|
||||
* We always try to spread first-level directories.
|
||||
*
|
||||
* If there are blockgroups with both free inodes and free blocks counts
|
||||
* not worse than average we return one with smallest directory count.
|
||||
* Otherwise we simply return a random group.
|
||||
*
|
||||
* For the rest rules look so:
|
||||
*
|
||||
* It's OK to put directory into a group unless
|
||||
* it has too many directories already (max_dirs) or
|
||||
* it has too few free inodes left (min_inodes) or
|
||||
* it has too few free blocks left (min_blocks) or
|
||||
* it's already running too large debt (max_debt).
|
||||
* Parent's group is prefered, if it doesn't satisfy these
|
||||
* conditions we search cyclically through the rest. If none
|
||||
* of the groups look good we just look for a group with more
|
||||
* free inodes than average (starting at parent's group).
|
||||
*
|
||||
* Debt is incremented each time we allocate a directory and decremented
|
||||
* when we allocate an inode, within 0--255.
|
||||
*/
|
||||
|
||||
#define INODE_COST 64
|
||||
#define BLOCK_COST 256
|
||||
|
||||
static int find_group_orlov(struct super_block *sb, struct inode *parent)
|
||||
{
|
||||
int parent_group = EXT3_I(parent)->i_block_group;
|
||||
struct ext3_sb_info *sbi = EXT3_SB(sb);
|
||||
struct ext3_super_block *es = sbi->s_es;
|
||||
int ngroups = sbi->s_groups_count;
|
||||
int inodes_per_group = EXT3_INODES_PER_GROUP(sb);
|
||||
unsigned int freei, avefreei;
|
||||
ext3_fsblk_t freeb, avefreeb;
|
||||
ext3_fsblk_t blocks_per_dir;
|
||||
unsigned int ndirs;
|
||||
int max_debt, max_dirs, min_inodes;
|
||||
ext3_grpblk_t min_blocks;
|
||||
int group = -1, i;
|
||||
struct ext3_group_desc *desc;
|
||||
struct buffer_head *bh;
|
||||
|
||||
freei = percpu_counter_read_positive(&sbi->s_freeinodes_counter);
|
||||
avefreei = freei / ngroups;
|
||||
freeb = percpu_counter_read_positive(&sbi->s_freeblocks_counter);
|
||||
avefreeb = freeb / ngroups;
|
||||
ndirs = percpu_counter_read_positive(&sbi->s_dirs_counter);
|
||||
|
||||
if ((parent == sb->s_root->d_inode) ||
|
||||
(EXT3_I(parent)->i_flags & EXT3_TOPDIR_FL)) {
|
||||
int best_ndir = inodes_per_group;
|
||||
int best_group = -1;
|
||||
|
||||
get_random_bytes(&group, sizeof(group));
|
||||
parent_group = (unsigned)group % ngroups;
|
||||
for (i = 0; i < ngroups; i++) {
|
||||
group = (parent_group + i) % ngroups;
|
||||
desc = ext3_get_group_desc (sb, group, &bh);
|
||||
if (!desc || !desc->bg_free_inodes_count)
|
||||
continue;
|
||||
if (le16_to_cpu(desc->bg_used_dirs_count) >= best_ndir)
|
||||
continue;
|
||||
if (le16_to_cpu(desc->bg_free_inodes_count) < avefreei)
|
||||
continue;
|
||||
if (le16_to_cpu(desc->bg_free_blocks_count) < avefreeb)
|
||||
continue;
|
||||
best_group = group;
|
||||
best_ndir = le16_to_cpu(desc->bg_used_dirs_count);
|
||||
}
|
||||
if (best_group >= 0)
|
||||
return best_group;
|
||||
goto fallback;
|
||||
}
|
||||
|
||||
blocks_per_dir = (le32_to_cpu(es->s_blocks_count) - freeb) / ndirs;
|
||||
|
||||
max_dirs = ndirs / ngroups + inodes_per_group / 16;
|
||||
min_inodes = avefreei - inodes_per_group / 4;
|
||||
min_blocks = avefreeb - EXT3_BLOCKS_PER_GROUP(sb) / 4;
|
||||
|
||||
max_debt = EXT3_BLOCKS_PER_GROUP(sb) / max(blocks_per_dir, (ext3_fsblk_t)BLOCK_COST);
|
||||
if (max_debt * INODE_COST > inodes_per_group)
|
||||
max_debt = inodes_per_group / INODE_COST;
|
||||
if (max_debt > 255)
|
||||
max_debt = 255;
|
||||
if (max_debt == 0)
|
||||
max_debt = 1;
|
||||
|
||||
for (i = 0; i < ngroups; i++) {
|
||||
group = (parent_group + i) % ngroups;
|
||||
desc = ext3_get_group_desc (sb, group, &bh);
|
||||
if (!desc || !desc->bg_free_inodes_count)
|
||||
continue;
|
||||
if (le16_to_cpu(desc->bg_used_dirs_count) >= max_dirs)
|
||||
continue;
|
||||
if (le16_to_cpu(desc->bg_free_inodes_count) < min_inodes)
|
||||
continue;
|
||||
if (le16_to_cpu(desc->bg_free_blocks_count) < min_blocks)
|
||||
continue;
|
||||
return group;
|
||||
}
|
||||
|
||||
fallback:
|
||||
for (i = 0; i < ngroups; i++) {
|
||||
group = (parent_group + i) % ngroups;
|
||||
desc = ext3_get_group_desc (sb, group, &bh);
|
||||
if (!desc || !desc->bg_free_inodes_count)
|
||||
continue;
|
||||
if (le16_to_cpu(desc->bg_free_inodes_count) >= avefreei)
|
||||
return group;
|
||||
}
|
||||
|
||||
if (avefreei) {
|
||||
/*
|
||||
* The free-inodes counter is approximate, and for really small
|
||||
* filesystems the above test can fail to find any blockgroups
|
||||
*/
|
||||
avefreei = 0;
|
||||
goto fallback;
|
||||
}
|
||||
|
||||
return -1;
|
||||
}
|
||||
|
||||
static int find_group_other(struct super_block *sb, struct inode *parent)
|
||||
{
|
||||
int parent_group = EXT3_I(parent)->i_block_group;
|
||||
int ngroups = EXT3_SB(sb)->s_groups_count;
|
||||
struct ext3_group_desc *desc;
|
||||
struct buffer_head *bh;
|
||||
int group, i;
|
||||
|
||||
/*
|
||||
* Try to place the inode in its parent directory
|
||||
*/
|
||||
group = parent_group;
|
||||
desc = ext3_get_group_desc (sb, group, &bh);
|
||||
if (desc && le16_to_cpu(desc->bg_free_inodes_count) &&
|
||||
le16_to_cpu(desc->bg_free_blocks_count))
|
||||
return group;
|
||||
|
||||
/*
|
||||
* We're going to place this inode in a different blockgroup from its
|
||||
* parent. We want to cause files in a common directory to all land in
|
||||
* the same blockgroup. But we want files which are in a different
|
||||
* directory which shares a blockgroup with our parent to land in a
|
||||
* different blockgroup.
|
||||
*
|
||||
* So add our directory's i_ino into the starting point for the hash.
|
||||
*/
|
||||
group = (group + parent->i_ino) % ngroups;
|
||||
|
||||
/*
|
||||
* Use a quadratic hash to find a group with a free inode and some free
|
||||
* blocks.
|
||||
*/
|
||||
for (i = 1; i < ngroups; i <<= 1) {
|
||||
group += i;
|
||||
if (group >= ngroups)
|
||||
group -= ngroups;
|
||||
desc = ext3_get_group_desc (sb, group, &bh);
|
||||
if (desc && le16_to_cpu(desc->bg_free_inodes_count) &&
|
||||
le16_to_cpu(desc->bg_free_blocks_count))
|
||||
return group;
|
||||
}
|
||||
|
||||
/*
|
||||
* That failed: try linear search for a free inode, even if that group
|
||||
* has no free blocks.
|
||||
*/
|
||||
group = parent_group;
|
||||
for (i = 0; i < ngroups; i++) {
|
||||
if (++group >= ngroups)
|
||||
group = 0;
|
||||
desc = ext3_get_group_desc (sb, group, &bh);
|
||||
if (desc && le16_to_cpu(desc->bg_free_inodes_count))
|
||||
return group;
|
||||
}
|
||||
|
||||
return -1;
|
||||
}
|
||||
|
||||
/*
|
||||
* There are two policies for allocating an inode. If the new inode is
|
||||
* a directory, then a forward search is made for a block group with both
|
||||
* free space and a low directory-to-inode ratio; if that fails, then of
|
||||
* the groups with above-average free space, that group with the fewest
|
||||
* directories already is chosen.
|
||||
*
|
||||
* For other inodes, search forward from the parent directory's block
|
||||
* group to find a free inode.
|
||||
*/
|
||||
struct inode *ext3_new_inode(handle_t *handle, struct inode * dir, int mode)
|
||||
{
|
||||
struct super_block *sb;
|
||||
struct buffer_head *bitmap_bh = NULL;
|
||||
struct buffer_head *bh2;
|
||||
int group;
|
||||
unsigned long ino = 0;
|
||||
struct inode * inode;
|
||||
struct ext3_group_desc * gdp = NULL;
|
||||
struct ext3_super_block * es;
|
||||
struct ext3_inode_info *ei;
|
||||
struct ext3_sb_info *sbi;
|
||||
int err = 0;
|
||||
struct inode *ret;
|
||||
int i;
|
||||
|
||||
/* Cannot create files in a deleted directory */
|
||||
if (!dir || !dir->i_nlink)
|
||||
return ERR_PTR(-EPERM);
|
||||
|
||||
sb = dir->i_sb;
|
||||
inode = new_inode(sb);
|
||||
if (!inode)
|
||||
return ERR_PTR(-ENOMEM);
|
||||
ei = EXT3_I(inode);
|
||||
|
||||
sbi = EXT3_SB(sb);
|
||||
es = sbi->s_es;
|
||||
if (S_ISDIR(mode)) {
|
||||
if (test_opt (sb, OLDALLOC))
|
||||
group = find_group_dir(sb, dir);
|
||||
else
|
||||
group = find_group_orlov(sb, dir);
|
||||
} else
|
||||
group = find_group_other(sb, dir);
|
||||
|
||||
err = -ENOSPC;
|
||||
if (group == -1)
|
||||
goto out;
|
||||
|
||||
for (i = 0; i < sbi->s_groups_count; i++) {
|
||||
err = -EIO;
|
||||
|
||||
gdp = ext3_get_group_desc(sb, group, &bh2);
|
||||
if (!gdp)
|
||||
goto fail;
|
||||
|
||||
brelse(bitmap_bh);
|
||||
bitmap_bh = read_inode_bitmap(sb, group);
|
||||
if (!bitmap_bh)
|
||||
goto fail;
|
||||
|
||||
ino = 0;
|
||||
|
||||
repeat_in_this_group:
|
||||
ino = ext3_find_next_zero_bit((unsigned long *)
|
||||
bitmap_bh->b_data, EXT3_INODES_PER_GROUP(sb), ino);
|
||||
if (ino < EXT3_INODES_PER_GROUP(sb)) {
|
||||
|
||||
BUFFER_TRACE(bitmap_bh, "get_write_access");
|
||||
err = ext3_journal_get_write_access(handle, bitmap_bh);
|
||||
if (err)
|
||||
goto fail;
|
||||
|
||||
if (!ext3_set_bit_atomic(sb_bgl_lock(sbi, group),
|
||||
ino, bitmap_bh->b_data)) {
|
||||
/* we won it */
|
||||
BUFFER_TRACE(bitmap_bh,
|
||||
"call ext3_journal_dirty_metadata");
|
||||
err = ext3_journal_dirty_metadata(handle,
|
||||
bitmap_bh);
|
||||
if (err)
|
||||
goto fail;
|
||||
goto got;
|
||||
}
|
||||
/* we lost it */
|
||||
journal_release_buffer(handle, bitmap_bh);
|
||||
|
||||
if (++ino < EXT3_INODES_PER_GROUP(sb))
|
||||
goto repeat_in_this_group;
|
||||
}
|
||||
|
||||
/*
|
||||
* This case is possible in concurrent environment. It is very
|
||||
* rare. We cannot repeat the find_group_xxx() call because
|
||||
* that will simply return the same blockgroup, because the
|
||||
* group descriptor metadata has not yet been updated.
|
||||
* So we just go onto the next blockgroup.
|
||||
*/
|
||||
if (++group == sbi->s_groups_count)
|
||||
group = 0;
|
||||
}
|
||||
err = -ENOSPC;
|
||||
goto out;
|
||||
|
||||
got:
|
||||
ino += group * EXT3_INODES_PER_GROUP(sb) + 1;
|
||||
if (ino < EXT3_FIRST_INO(sb) || ino > le32_to_cpu(es->s_inodes_count)) {
|
||||
ext3_error (sb, "ext3_new_inode",
|
||||
"reserved inode or inode > inodes count - "
|
||||
"block_group = %d, inode=%lu", group, ino);
|
||||
err = -EIO;
|
||||
goto fail;
|
||||
}
|
||||
|
||||
BUFFER_TRACE(bh2, "get_write_access");
|
||||
err = ext3_journal_get_write_access(handle, bh2);
|
||||
if (err) goto fail;
|
||||
spin_lock(sb_bgl_lock(sbi, group));
|
||||
gdp->bg_free_inodes_count =
|
||||
cpu_to_le16(le16_to_cpu(gdp->bg_free_inodes_count) - 1);
|
||||
if (S_ISDIR(mode)) {
|
||||
gdp->bg_used_dirs_count =
|
||||
cpu_to_le16(le16_to_cpu(gdp->bg_used_dirs_count) + 1);
|
||||
}
|
||||
spin_unlock(sb_bgl_lock(sbi, group));
|
||||
BUFFER_TRACE(bh2, "call ext3_journal_dirty_metadata");
|
||||
err = ext3_journal_dirty_metadata(handle, bh2);
|
||||
if (err) goto fail;
|
||||
|
||||
percpu_counter_dec(&sbi->s_freeinodes_counter);
|
||||
if (S_ISDIR(mode))
|
||||
percpu_counter_inc(&sbi->s_dirs_counter);
|
||||
sb->s_dirt = 1;
|
||||
|
||||
inode->i_uid = current->fsuid;
|
||||
if (test_opt (sb, GRPID))
|
||||
inode->i_gid = dir->i_gid;
|
||||
else if (dir->i_mode & S_ISGID) {
|
||||
inode->i_gid = dir->i_gid;
|
||||
if (S_ISDIR(mode))
|
||||
mode |= S_ISGID;
|
||||
} else
|
||||
inode->i_gid = current->fsgid;
|
||||
inode->i_mode = mode;
|
||||
|
||||
inode->i_ino = ino;
|
||||
/* This is the optimal IO size (for stat), not the fs block size */
|
||||
inode->i_blocks = 0;
|
||||
inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
|
||||
|
||||
memset(ei->i_data, 0, sizeof(ei->i_data));
|
||||
ei->i_dir_start_lookup = 0;
|
||||
ei->i_disksize = 0;
|
||||
|
||||
ei->i_flags = EXT3_I(dir)->i_flags & ~EXT3_INDEX_FL;
|
||||
if (S_ISLNK(mode))
|
||||
ei->i_flags &= ~(EXT3_IMMUTABLE_FL|EXT3_APPEND_FL);
|
||||
/* dirsync only applies to directories */
|
||||
if (!S_ISDIR(mode))
|
||||
ei->i_flags &= ~EXT3_DIRSYNC_FL;
|
||||
#ifdef EXT3_FRAGMENTS
|
||||
ei->i_faddr = 0;
|
||||
ei->i_frag_no = 0;
|
||||
ei->i_frag_size = 0;
|
||||
#endif
|
||||
ei->i_file_acl = 0;
|
||||
ei->i_dir_acl = 0;
|
||||
ei->i_dtime = 0;
|
||||
ei->i_block_alloc_info = NULL;
|
||||
ei->i_block_group = group;
|
||||
|
||||
ext3_set_inode_flags(inode);
|
||||
if (IS_DIRSYNC(inode))
|
||||
handle->h_sync = 1;
|
||||
insert_inode_hash(inode);
|
||||
spin_lock(&sbi->s_next_gen_lock);
|
||||
inode->i_generation = sbi->s_next_generation++;
|
||||
spin_unlock(&sbi->s_next_gen_lock);
|
||||
|
||||
ei->i_state = EXT3_STATE_NEW;
|
||||
ei->i_extra_isize =
|
||||
(EXT3_INODE_SIZE(inode->i_sb) > EXT3_GOOD_OLD_INODE_SIZE) ?
|
||||
sizeof(struct ext3_inode) - EXT3_GOOD_OLD_INODE_SIZE : 0;
|
||||
|
||||
ret = inode;
|
||||
if(DQUOT_ALLOC_INODE(inode)) {
|
||||
err = -EDQUOT;
|
||||
goto fail_drop;
|
||||
}
|
||||
|
||||
err = ext3_init_acl(handle, inode, dir);
|
||||
if (err)
|
||||
goto fail_free_drop;
|
||||
|
||||
err = ext3_init_security(handle,inode, dir);
|
||||
if (err)
|
||||
goto fail_free_drop;
|
||||
|
||||
err = ext3_mark_inode_dirty(handle, inode);
|
||||
if (err) {
|
||||
ext3_std_error(sb, err);
|
||||
goto fail_free_drop;
|
||||
}
|
||||
|
||||
ext3_debug("allocating inode %lu\n", inode->i_ino);
|
||||
goto really_out;
|
||||
fail:
|
||||
ext3_std_error(sb, err);
|
||||
out:
|
||||
iput(inode);
|
||||
ret = ERR_PTR(err);
|
||||
really_out:
|
||||
brelse(bitmap_bh);
|
||||
return ret;
|
||||
|
||||
fail_free_drop:
|
||||
DQUOT_FREE_INODE(inode);
|
||||
|
||||
fail_drop:
|
||||
DQUOT_DROP(inode);
|
||||
inode->i_flags |= S_NOQUOTA;
|
||||
inode->i_nlink = 0;
|
||||
iput(inode);
|
||||
brelse(bitmap_bh);
|
||||
return ERR_PTR(err);
|
||||
}
|
||||
|
||||
/* Verify that we are loading a valid orphan from disk */
|
||||
struct inode *ext3_orphan_get(struct super_block *sb, unsigned long ino)
|
||||
{
|
||||
unsigned long max_ino = le32_to_cpu(EXT3_SB(sb)->s_es->s_inodes_count);
|
||||
unsigned long block_group;
|
||||
int bit;
|
||||
struct buffer_head *bitmap_bh = NULL;
|
||||
struct inode *inode = NULL;
|
||||
|
||||
/* Error cases - e2fsck has already cleaned up for us */
|
||||
if (ino > max_ino) {
|
||||
ext3_warning(sb, __FUNCTION__,
|
||||
"bad orphan ino %lu! e2fsck was run?", ino);
|
||||
goto out;
|
||||
}
|
||||
|
||||
block_group = (ino - 1) / EXT3_INODES_PER_GROUP(sb);
|
||||
bit = (ino - 1) % EXT3_INODES_PER_GROUP(sb);
|
||||
bitmap_bh = read_inode_bitmap(sb, block_group);
|
||||
if (!bitmap_bh) {
|
||||
ext3_warning(sb, __FUNCTION__,
|
||||
"inode bitmap error for orphan %lu", ino);
|
||||
goto out;
|
||||
}
|
||||
|
||||
/* Having the inode bit set should be a 100% indicator that this
|
||||
* is a valid orphan (no e2fsck run on fs). Orphans also include
|
||||
* inodes that were being truncated, so we can't check i_nlink==0.
|
||||
*/
|
||||
if (!ext3_test_bit(bit, bitmap_bh->b_data) ||
|
||||
!(inode = iget(sb, ino)) || is_bad_inode(inode) ||
|
||||
NEXT_ORPHAN(inode) > max_ino) {
|
||||
ext3_warning(sb, __FUNCTION__,
|
||||
"bad orphan inode %lu! e2fsck was run?", ino);
|
||||
printk(KERN_NOTICE "ext3_test_bit(bit=%d, block=%llu) = %d\n",
|
||||
bit, (unsigned long long)bitmap_bh->b_blocknr,
|
||||
ext3_test_bit(bit, bitmap_bh->b_data));
|
||||
printk(KERN_NOTICE "inode=%p\n", inode);
|
||||
if (inode) {
|
||||
printk(KERN_NOTICE "is_bad_inode(inode)=%d\n",
|
||||
is_bad_inode(inode));
|
||||
printk(KERN_NOTICE "NEXT_ORPHAN(inode)=%u\n",
|
||||
NEXT_ORPHAN(inode));
|
||||
printk(KERN_NOTICE "max_ino=%lu\n", max_ino);
|
||||
}
|
||||
/* Avoid freeing blocks if we got a bad deleted inode */
|
||||
if (inode && inode->i_nlink == 0)
|
||||
inode->i_blocks = 0;
|
||||
iput(inode);
|
||||
inode = NULL;
|
||||
}
|
||||
out:
|
||||
brelse(bitmap_bh);
|
||||
return inode;
|
||||
}
|
||||
|
||||
unsigned long ext3_count_free_inodes (struct super_block * sb)
|
||||
{
|
||||
unsigned long desc_count;
|
||||
struct ext3_group_desc *gdp;
|
||||
int i;
|
||||
#ifdef EXT3FS_DEBUG
|
||||
struct ext3_super_block *es;
|
||||
unsigned long bitmap_count, x;
|
||||
struct buffer_head *bitmap_bh = NULL;
|
||||
|
||||
es = EXT3_SB(sb)->s_es;
|
||||
desc_count = 0;
|
||||
bitmap_count = 0;
|
||||
gdp = NULL;
|
||||
for (i = 0; i < EXT3_SB(sb)->s_groups_count; i++) {
|
||||
gdp = ext3_get_group_desc (sb, i, NULL);
|
||||
if (!gdp)
|
||||
continue;
|
||||
desc_count += le16_to_cpu(gdp->bg_free_inodes_count);
|
||||
brelse(bitmap_bh);
|
||||
bitmap_bh = read_inode_bitmap(sb, i);
|
||||
if (!bitmap_bh)
|
||||
continue;
|
||||
|
||||
x = ext3_count_free(bitmap_bh, EXT3_INODES_PER_GROUP(sb) / 8);
|
||||
printk("group %d: stored = %d, counted = %lu\n",
|
||||
i, le16_to_cpu(gdp->bg_free_inodes_count), x);
|
||||
bitmap_count += x;
|
||||
}
|
||||
brelse(bitmap_bh);
|
||||
printk("ext3_count_free_inodes: stored = %u, computed = %lu, %lu\n",
|
||||
le32_to_cpu(es->s_free_inodes_count), desc_count, bitmap_count);
|
||||
return desc_count;
|
||||
#else
|
||||
desc_count = 0;
|
||||
for (i = 0; i < EXT3_SB(sb)->s_groups_count; i++) {
|
||||
gdp = ext3_get_group_desc (sb, i, NULL);
|
||||
if (!gdp)
|
||||
continue;
|
||||
desc_count += le16_to_cpu(gdp->bg_free_inodes_count);
|
||||
cond_resched();
|
||||
}
|
||||
return desc_count;
|
||||
#endif
|
||||
}
|
||||
|
||||
/* Called at mount-time, super-block is locked */
|
||||
unsigned long ext3_count_dirs (struct super_block * sb)
|
||||
{
|
||||
unsigned long count = 0;
|
||||
int i;
|
||||
|
||||
for (i = 0; i < EXT3_SB(sb)->s_groups_count; i++) {
|
||||
struct ext3_group_desc *gdp = ext3_get_group_desc (sb, i, NULL);
|
||||
if (!gdp)
|
||||
continue;
|
||||
count += le16_to_cpu(gdp->bg_used_dirs_count);
|
||||
}
|
||||
return count;
|
||||
}
|
||||
|
||||
3219
fs/ext4/inode.c
Normal file
3219
fs/ext4/inode.c
Normal file
File diff suppressed because it is too large
Load Diff
307
fs/ext4/ioctl.c
Normal file
307
fs/ext4/ioctl.c
Normal file
@ -0,0 +1,307 @@
|
||||
/*
|
||||
* linux/fs/ext3/ioctl.c
|
||||
*
|
||||
* Copyright (C) 1993, 1994, 1995
|
||||
* Remy Card (card@masi.ibp.fr)
|
||||
* Laboratoire MASI - Institut Blaise Pascal
|
||||
* Universite Pierre et Marie Curie (Paris VI)
|
||||
*/
|
||||
|
||||
#include <linux/fs.h>
|
||||
#include <linux/jbd.h>
|
||||
#include <linux/capability.h>
|
||||
#include <linux/ext3_fs.h>
|
||||
#include <linux/ext3_jbd.h>
|
||||
#include <linux/time.h>
|
||||
#include <linux/compat.h>
|
||||
#include <linux/smp_lock.h>
|
||||
#include <asm/uaccess.h>
|
||||
|
||||
int ext3_ioctl (struct inode * inode, struct file * filp, unsigned int cmd,
|
||||
unsigned long arg)
|
||||
{
|
||||
struct ext3_inode_info *ei = EXT3_I(inode);
|
||||
unsigned int flags;
|
||||
unsigned short rsv_window_size;
|
||||
|
||||
ext3_debug ("cmd = %u, arg = %lu\n", cmd, arg);
|
||||
|
||||
switch (cmd) {
|
||||
case EXT3_IOC_GETFLAGS:
|
||||
flags = ei->i_flags & EXT3_FL_USER_VISIBLE;
|
||||
return put_user(flags, (int __user *) arg);
|
||||
case EXT3_IOC_SETFLAGS: {
|
||||
handle_t *handle = NULL;
|
||||
int err;
|
||||
struct ext3_iloc iloc;
|
||||
unsigned int oldflags;
|
||||
unsigned int jflag;
|
||||
|
||||
if (IS_RDONLY(inode))
|
||||
return -EROFS;
|
||||
|
||||
if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
|
||||
return -EACCES;
|
||||
|
||||
if (get_user(flags, (int __user *) arg))
|
||||
return -EFAULT;
|
||||
|
||||
if (!S_ISDIR(inode->i_mode))
|
||||
flags &= ~EXT3_DIRSYNC_FL;
|
||||
|
||||
mutex_lock(&inode->i_mutex);
|
||||
oldflags = ei->i_flags;
|
||||
|
||||
/* The JOURNAL_DATA flag is modifiable only by root */
|
||||
jflag = flags & EXT3_JOURNAL_DATA_FL;
|
||||
|
||||
/*
|
||||
* The IMMUTABLE and APPEND_ONLY flags can only be changed by
|
||||
* the relevant capability.
|
||||
*
|
||||
* This test looks nicer. Thanks to Pauline Middelink
|
||||
*/
|
||||
if ((flags ^ oldflags) & (EXT3_APPEND_FL | EXT3_IMMUTABLE_FL)) {
|
||||
if (!capable(CAP_LINUX_IMMUTABLE)) {
|
||||
mutex_unlock(&inode->i_mutex);
|
||||
return -EPERM;
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* The JOURNAL_DATA flag can only be changed by
|
||||
* the relevant capability.
|
||||
*/
|
||||
if ((jflag ^ oldflags) & (EXT3_JOURNAL_DATA_FL)) {
|
||||
if (!capable(CAP_SYS_RESOURCE)) {
|
||||
mutex_unlock(&inode->i_mutex);
|
||||
return -EPERM;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
handle = ext3_journal_start(inode, 1);
|
||||
if (IS_ERR(handle)) {
|
||||
mutex_unlock(&inode->i_mutex);
|
||||
return PTR_ERR(handle);
|
||||
}
|
||||
if (IS_SYNC(inode))
|
||||
handle->h_sync = 1;
|
||||
err = ext3_reserve_inode_write(handle, inode, &iloc);
|
||||
if (err)
|
||||
goto flags_err;
|
||||
|
||||
flags = flags & EXT3_FL_USER_MODIFIABLE;
|
||||
flags |= oldflags & ~EXT3_FL_USER_MODIFIABLE;
|
||||
ei->i_flags = flags;
|
||||
|
||||
ext3_set_inode_flags(inode);
|
||||
inode->i_ctime = CURRENT_TIME_SEC;
|
||||
|
||||
err = ext3_mark_iloc_dirty(handle, inode, &iloc);
|
||||
flags_err:
|
||||
ext3_journal_stop(handle);
|
||||
if (err) {
|
||||
mutex_unlock(&inode->i_mutex);
|
||||
return err;
|
||||
}
|
||||
|
||||
if ((jflag ^ oldflags) & (EXT3_JOURNAL_DATA_FL))
|
||||
err = ext3_change_inode_journal_flag(inode, jflag);
|
||||
mutex_unlock(&inode->i_mutex);
|
||||
return err;
|
||||
}
|
||||
case EXT3_IOC_GETVERSION:
|
||||
case EXT3_IOC_GETVERSION_OLD:
|
||||
return put_user(inode->i_generation, (int __user *) arg);
|
||||
case EXT3_IOC_SETVERSION:
|
||||
case EXT3_IOC_SETVERSION_OLD: {
|
||||
handle_t *handle;
|
||||
struct ext3_iloc iloc;
|
||||
__u32 generation;
|
||||
int err;
|
||||
|
||||
if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
|
||||
return -EPERM;
|
||||
if (IS_RDONLY(inode))
|
||||
return -EROFS;
|
||||
if (get_user(generation, (int __user *) arg))
|
||||
return -EFAULT;
|
||||
|
||||
handle = ext3_journal_start(inode, 1);
|
||||
if (IS_ERR(handle))
|
||||
return PTR_ERR(handle);
|
||||
err = ext3_reserve_inode_write(handle, inode, &iloc);
|
||||
if (err == 0) {
|
||||
inode->i_ctime = CURRENT_TIME_SEC;
|
||||
inode->i_generation = generation;
|
||||
err = ext3_mark_iloc_dirty(handle, inode, &iloc);
|
||||
}
|
||||
ext3_journal_stop(handle);
|
||||
return err;
|
||||
}
|
||||
#ifdef CONFIG_JBD_DEBUG
|
||||
case EXT3_IOC_WAIT_FOR_READONLY:
|
||||
/*
|
||||
* This is racy - by the time we're woken up and running,
|
||||
* the superblock could be released. And the module could
|
||||
* have been unloaded. So sue me.
|
||||
*
|
||||
* Returns 1 if it slept, else zero.
|
||||
*/
|
||||
{
|
||||
struct super_block *sb = inode->i_sb;
|
||||
DECLARE_WAITQUEUE(wait, current);
|
||||
int ret = 0;
|
||||
|
||||
set_current_state(TASK_INTERRUPTIBLE);
|
||||
add_wait_queue(&EXT3_SB(sb)->ro_wait_queue, &wait);
|
||||
if (timer_pending(&EXT3_SB(sb)->turn_ro_timer)) {
|
||||
schedule();
|
||||
ret = 1;
|
||||
}
|
||||
remove_wait_queue(&EXT3_SB(sb)->ro_wait_queue, &wait);
|
||||
return ret;
|
||||
}
|
||||
#endif
|
||||
case EXT3_IOC_GETRSVSZ:
|
||||
if (test_opt(inode->i_sb, RESERVATION)
|
||||
&& S_ISREG(inode->i_mode)
|
||||
&& ei->i_block_alloc_info) {
|
||||
rsv_window_size = ei->i_block_alloc_info->rsv_window_node.rsv_goal_size;
|
||||
return put_user(rsv_window_size, (int __user *)arg);
|
||||
}
|
||||
return -ENOTTY;
|
||||
case EXT3_IOC_SETRSVSZ: {
|
||||
|
||||
if (!test_opt(inode->i_sb, RESERVATION) ||!S_ISREG(inode->i_mode))
|
||||
return -ENOTTY;
|
||||
|
||||
if (IS_RDONLY(inode))
|
||||
return -EROFS;
|
||||
|
||||
if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
|
||||
return -EACCES;
|
||||
|
||||
if (get_user(rsv_window_size, (int __user *)arg))
|
||||
return -EFAULT;
|
||||
|
||||
if (rsv_window_size > EXT3_MAX_RESERVE_BLOCKS)
|
||||
rsv_window_size = EXT3_MAX_RESERVE_BLOCKS;
|
||||
|
||||
/*
|
||||
* need to allocate reservation structure for this inode
|
||||
* before set the window size
|
||||
*/
|
||||
mutex_lock(&ei->truncate_mutex);
|
||||
if (!ei->i_block_alloc_info)
|
||||
ext3_init_block_alloc_info(inode);
|
||||
|
||||
if (ei->i_block_alloc_info){
|
||||
struct ext3_reserve_window_node *rsv = &ei->i_block_alloc_info->rsv_window_node;
|
||||
rsv->rsv_goal_size = rsv_window_size;
|
||||
}
|
||||
mutex_unlock(&ei->truncate_mutex);
|
||||
return 0;
|
||||
}
|
||||
case EXT3_IOC_GROUP_EXTEND: {
|
||||
ext3_fsblk_t n_blocks_count;
|
||||
struct super_block *sb = inode->i_sb;
|
||||
int err;
|
||||
|
||||
if (!capable(CAP_SYS_RESOURCE))
|
||||
return -EPERM;
|
||||
|
||||
if (IS_RDONLY(inode))
|
||||
return -EROFS;
|
||||
|
||||
if (get_user(n_blocks_count, (__u32 __user *)arg))
|
||||
return -EFAULT;
|
||||
|
||||
err = ext3_group_extend(sb, EXT3_SB(sb)->s_es, n_blocks_count);
|
||||
journal_lock_updates(EXT3_SB(sb)->s_journal);
|
||||
journal_flush(EXT3_SB(sb)->s_journal);
|
||||
journal_unlock_updates(EXT3_SB(sb)->s_journal);
|
||||
|
||||
return err;
|
||||
}
|
||||
case EXT3_IOC_GROUP_ADD: {
|
||||
struct ext3_new_group_data input;
|
||||
struct super_block *sb = inode->i_sb;
|
||||
int err;
|
||||
|
||||
if (!capable(CAP_SYS_RESOURCE))
|
||||
return -EPERM;
|
||||
|
||||
if (IS_RDONLY(inode))
|
||||
return -EROFS;
|
||||
|
||||
if (copy_from_user(&input, (struct ext3_new_group_input __user *)arg,
|
||||
sizeof(input)))
|
||||
return -EFAULT;
|
||||
|
||||
err = ext3_group_add(sb, &input);
|
||||
journal_lock_updates(EXT3_SB(sb)->s_journal);
|
||||
journal_flush(EXT3_SB(sb)->s_journal);
|
||||
journal_unlock_updates(EXT3_SB(sb)->s_journal);
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
|
||||
default:
|
||||
return -ENOTTY;
|
||||
}
|
||||
}
|
||||
|
||||
#ifdef CONFIG_COMPAT
|
||||
long ext3_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
|
||||
{
|
||||
struct inode *inode = file->f_dentry->d_inode;
|
||||
int ret;
|
||||
|
||||
/* These are just misnamed, they actually get/put from/to user an int */
|
||||
switch (cmd) {
|
||||
case EXT3_IOC32_GETFLAGS:
|
||||
cmd = EXT3_IOC_GETFLAGS;
|
||||
break;
|
||||
case EXT3_IOC32_SETFLAGS:
|
||||
cmd = EXT3_IOC_SETFLAGS;
|
||||
break;
|
||||
case EXT3_IOC32_GETVERSION:
|
||||
cmd = EXT3_IOC_GETVERSION;
|
||||
break;
|
||||
case EXT3_IOC32_SETVERSION:
|
||||
cmd = EXT3_IOC_SETVERSION;
|
||||
break;
|
||||
case EXT3_IOC32_GROUP_EXTEND:
|
||||
cmd = EXT3_IOC_GROUP_EXTEND;
|
||||
break;
|
||||
case EXT3_IOC32_GETVERSION_OLD:
|
||||
cmd = EXT3_IOC_GETVERSION_OLD;
|
||||
break;
|
||||
case EXT3_IOC32_SETVERSION_OLD:
|
||||
cmd = EXT3_IOC_SETVERSION_OLD;
|
||||
break;
|
||||
#ifdef CONFIG_JBD_DEBUG
|
||||
case EXT3_IOC32_WAIT_FOR_READONLY:
|
||||
cmd = EXT3_IOC_WAIT_FOR_READONLY;
|
||||
break;
|
||||
#endif
|
||||
case EXT3_IOC32_GETRSVSZ:
|
||||
cmd = EXT3_IOC_GETRSVSZ;
|
||||
break;
|
||||
case EXT3_IOC32_SETRSVSZ:
|
||||
cmd = EXT3_IOC_SETRSVSZ;
|
||||
break;
|
||||
case EXT3_IOC_GROUP_ADD:
|
||||
break;
|
||||
default:
|
||||
return -ENOIOCTLCMD;
|
||||
}
|
||||
lock_kernel();
|
||||
ret = ext3_ioctl(inode, file, cmd, (unsigned long) compat_ptr(arg));
|
||||
unlock_kernel();
|
||||
return ret;
|
||||
}
|
||||
#endif
|
||||
2397
fs/ext4/namei.c
Normal file
2397
fs/ext4/namei.c
Normal file
File diff suppressed because it is too large
Load Diff
8
fs/ext4/namei.h
Normal file
8
fs/ext4/namei.h
Normal file
@ -0,0 +1,8 @@
|
||||
/* linux/fs/ext3/namei.h
|
||||
*
|
||||
* Copyright (C) 2005 Simtec Electronics
|
||||
* Ben Dooks <ben@simtec.co.uk>
|
||||
*
|
||||
*/
|
||||
|
||||
extern struct dentry *ext3_get_parent(struct dentry *child);
|
||||
1042
fs/ext4/resize.c
Normal file
1042
fs/ext4/resize.c
Normal file
File diff suppressed because it is too large
Load Diff
2754
fs/ext4/super.c
Normal file
2754
fs/ext4/super.c
Normal file
File diff suppressed because it is too large
Load Diff
54
fs/ext4/symlink.c
Normal file
54
fs/ext4/symlink.c
Normal file
@ -0,0 +1,54 @@
|
||||
/*
|
||||
* linux/fs/ext3/symlink.c
|
||||
*
|
||||
* Only fast symlinks left here - the rest is done by generic code. AV, 1999
|
||||
*
|
||||
* Copyright (C) 1992, 1993, 1994, 1995
|
||||
* Remy Card (card@masi.ibp.fr)
|
||||
* Laboratoire MASI - Institut Blaise Pascal
|
||||
* Universite Pierre et Marie Curie (Paris VI)
|
||||
*
|
||||
* from
|
||||
*
|
||||
* linux/fs/minix/symlink.c
|
||||
*
|
||||
* Copyright (C) 1991, 1992 Linus Torvalds
|
||||
*
|
||||
* ext3 symlink handling code
|
||||
*/
|
||||
|
||||
#include <linux/fs.h>
|
||||
#include <linux/jbd.h>
|
||||
#include <linux/ext3_fs.h>
|
||||
#include <linux/namei.h>
|
||||
#include "xattr.h"
|
||||
|
||||
static void * ext3_follow_link(struct dentry *dentry, struct nameidata *nd)
|
||||
{
|
||||
struct ext3_inode_info *ei = EXT3_I(dentry->d_inode);
|
||||
nd_set_link(nd, (char*)ei->i_data);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
struct inode_operations ext3_symlink_inode_operations = {
|
||||
.readlink = generic_readlink,
|
||||
.follow_link = page_follow_link_light,
|
||||
.put_link = page_put_link,
|
||||
#ifdef CONFIG_EXT3_FS_XATTR
|
||||
.setxattr = generic_setxattr,
|
||||
.getxattr = generic_getxattr,
|
||||
.listxattr = ext3_listxattr,
|
||||
.removexattr = generic_removexattr,
|
||||
#endif
|
||||
};
|
||||
|
||||
struct inode_operations ext3_fast_symlink_inode_operations = {
|
||||
.readlink = generic_readlink,
|
||||
.follow_link = ext3_follow_link,
|
||||
#ifdef CONFIG_EXT3_FS_XATTR
|
||||
.setxattr = generic_setxattr,
|
||||
.getxattr = generic_getxattr,
|
||||
.listxattr = ext3_listxattr,
|
||||
.removexattr = generic_removexattr,
|
||||
#endif
|
||||
};
|
||||
1317
fs/ext4/xattr.c
Normal file
1317
fs/ext4/xattr.c
Normal file
File diff suppressed because it is too large
Load Diff
145
fs/ext4/xattr.h
Normal file
145
fs/ext4/xattr.h
Normal file
@ -0,0 +1,145 @@
|
||||
/*
|
||||
File: fs/ext3/xattr.h
|
||||
|
||||
On-disk format of extended attributes for the ext3 filesystem.
|
||||
|
||||
(C) 2001 Andreas Gruenbacher, <a.gruenbacher@computer.org>
|
||||
*/
|
||||
|
||||
#include <linux/xattr.h>
|
||||
|
||||
/* Magic value in attribute blocks */
|
||||
#define EXT3_XATTR_MAGIC 0xEA020000
|
||||
|
||||
/* Maximum number of references to one attribute block */
|
||||
#define EXT3_XATTR_REFCOUNT_MAX 1024
|
||||
|
||||
/* Name indexes */
|
||||
#define EXT3_XATTR_INDEX_USER 1
|
||||
#define EXT3_XATTR_INDEX_POSIX_ACL_ACCESS 2
|
||||
#define EXT3_XATTR_INDEX_POSIX_ACL_DEFAULT 3
|
||||
#define EXT3_XATTR_INDEX_TRUSTED 4
|
||||
#define EXT3_XATTR_INDEX_LUSTRE 5
|
||||
#define EXT3_XATTR_INDEX_SECURITY 6
|
||||
|
||||
struct ext3_xattr_header {
|
||||
__le32 h_magic; /* magic number for identification */
|
||||
__le32 h_refcount; /* reference count */
|
||||
__le32 h_blocks; /* number of disk blocks used */
|
||||
__le32 h_hash; /* hash value of all attributes */
|
||||
__u32 h_reserved[4]; /* zero right now */
|
||||
};
|
||||
|
||||
struct ext3_xattr_ibody_header {
|
||||
__le32 h_magic; /* magic number for identification */
|
||||
};
|
||||
|
||||
struct ext3_xattr_entry {
|
||||
__u8 e_name_len; /* length of name */
|
||||
__u8 e_name_index; /* attribute name index */
|
||||
__le16 e_value_offs; /* offset in disk block of value */
|
||||
__le32 e_value_block; /* disk block attribute is stored on (n/i) */
|
||||
__le32 e_value_size; /* size of attribute value */
|
||||
__le32 e_hash; /* hash value of name and value */
|
||||
char e_name[0]; /* attribute name */
|
||||
};
|
||||
|
||||
#define EXT3_XATTR_PAD_BITS 2
|
||||
#define EXT3_XATTR_PAD (1<<EXT3_XATTR_PAD_BITS)
|
||||
#define EXT3_XATTR_ROUND (EXT3_XATTR_PAD-1)
|
||||
#define EXT3_XATTR_LEN(name_len) \
|
||||
(((name_len) + EXT3_XATTR_ROUND + \
|
||||
sizeof(struct ext3_xattr_entry)) & ~EXT3_XATTR_ROUND)
|
||||
#define EXT3_XATTR_NEXT(entry) \
|
||||
( (struct ext3_xattr_entry *)( \
|
||||
(char *)(entry) + EXT3_XATTR_LEN((entry)->e_name_len)) )
|
||||
#define EXT3_XATTR_SIZE(size) \
|
||||
(((size) + EXT3_XATTR_ROUND) & ~EXT3_XATTR_ROUND)
|
||||
|
||||
# ifdef CONFIG_EXT3_FS_XATTR
|
||||
|
||||
extern struct xattr_handler ext3_xattr_user_handler;
|
||||
extern struct xattr_handler ext3_xattr_trusted_handler;
|
||||
extern struct xattr_handler ext3_xattr_acl_access_handler;
|
||||
extern struct xattr_handler ext3_xattr_acl_default_handler;
|
||||
extern struct xattr_handler ext3_xattr_security_handler;
|
||||
|
||||
extern ssize_t ext3_listxattr(struct dentry *, char *, size_t);
|
||||
|
||||
extern int ext3_xattr_get(struct inode *, int, const char *, void *, size_t);
|
||||
extern int ext3_xattr_list(struct inode *, char *, size_t);
|
||||
extern int ext3_xattr_set(struct inode *, int, const char *, const void *, size_t, int);
|
||||
extern int ext3_xattr_set_handle(handle_t *, struct inode *, int, const char *, const void *, size_t, int);
|
||||
|
||||
extern void ext3_xattr_delete_inode(handle_t *, struct inode *);
|
||||
extern void ext3_xattr_put_super(struct super_block *);
|
||||
|
||||
extern int init_ext3_xattr(void);
|
||||
extern void exit_ext3_xattr(void);
|
||||
|
||||
extern struct xattr_handler *ext3_xattr_handlers[];
|
||||
|
||||
# else /* CONFIG_EXT3_FS_XATTR */
|
||||
|
||||
static inline int
|
||||
ext3_xattr_get(struct inode *inode, int name_index, const char *name,
|
||||
void *buffer, size_t size, int flags)
|
||||
{
|
||||
return -EOPNOTSUPP;
|
||||
}
|
||||
|
||||
static inline int
|
||||
ext3_xattr_list(struct inode *inode, void *buffer, size_t size)
|
||||
{
|
||||
return -EOPNOTSUPP;
|
||||
}
|
||||
|
||||
static inline int
|
||||
ext3_xattr_set(struct inode *inode, int name_index, const char *name,
|
||||
const void *value, size_t size, int flags)
|
||||
{
|
||||
return -EOPNOTSUPP;
|
||||
}
|
||||
|
||||
static inline int
|
||||
ext3_xattr_set_handle(handle_t *handle, struct inode *inode, int name_index,
|
||||
const char *name, const void *value, size_t size, int flags)
|
||||
{
|
||||
return -EOPNOTSUPP;
|
||||
}
|
||||
|
||||
static inline void
|
||||
ext3_xattr_delete_inode(handle_t *handle, struct inode *inode)
|
||||
{
|
||||
}
|
||||
|
||||
static inline void
|
||||
ext3_xattr_put_super(struct super_block *sb)
|
||||
{
|
||||
}
|
||||
|
||||
static inline int
|
||||
init_ext3_xattr(void)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline void
|
||||
exit_ext3_xattr(void)
|
||||
{
|
||||
}
|
||||
|
||||
#define ext3_xattr_handlers NULL
|
||||
|
||||
# endif /* CONFIG_EXT3_FS_XATTR */
|
||||
|
||||
#ifdef CONFIG_EXT3_FS_SECURITY
|
||||
extern int ext3_init_security(handle_t *handle, struct inode *inode,
|
||||
struct inode *dir);
|
||||
#else
|
||||
static inline int ext3_init_security(handle_t *handle, struct inode *inode,
|
||||
struct inode *dir)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
77
fs/ext4/xattr_security.c
Normal file
77
fs/ext4/xattr_security.c
Normal file
@ -0,0 +1,77 @@
|
||||
/*
|
||||
* linux/fs/ext3/xattr_security.c
|
||||
* Handler for storing security labels as extended attributes.
|
||||
*/
|
||||
|
||||
#include <linux/module.h>
|
||||
#include <linux/string.h>
|
||||
#include <linux/fs.h>
|
||||
#include <linux/smp_lock.h>
|
||||
#include <linux/ext3_jbd.h>
|
||||
#include <linux/ext3_fs.h>
|
||||
#include <linux/security.h>
|
||||
#include "xattr.h"
|
||||
|
||||
static size_t
|
||||
ext3_xattr_security_list(struct inode *inode, char *list, size_t list_size,
|
||||
const char *name, size_t name_len)
|
||||
{
|
||||
const size_t prefix_len = sizeof(XATTR_SECURITY_PREFIX)-1;
|
||||
const size_t total_len = prefix_len + name_len + 1;
|
||||
|
||||
|
||||
if (list && total_len <= list_size) {
|
||||
memcpy(list, XATTR_SECURITY_PREFIX, prefix_len);
|
||||
memcpy(list+prefix_len, name, name_len);
|
||||
list[prefix_len + name_len] = '\0';
|
||||
}
|
||||
return total_len;
|
||||
}
|
||||
|
||||
static int
|
||||
ext3_xattr_security_get(struct inode *inode, const char *name,
|
||||
void *buffer, size_t size)
|
||||
{
|
||||
if (strcmp(name, "") == 0)
|
||||
return -EINVAL;
|
||||
return ext3_xattr_get(inode, EXT3_XATTR_INDEX_SECURITY, name,
|
||||
buffer, size);
|
||||
}
|
||||
|
||||
static int
|
||||
ext3_xattr_security_set(struct inode *inode, const char *name,
|
||||
const void *value, size_t size, int flags)
|
||||
{
|
||||
if (strcmp(name, "") == 0)
|
||||
return -EINVAL;
|
||||
return ext3_xattr_set(inode, EXT3_XATTR_INDEX_SECURITY, name,
|
||||
value, size, flags);
|
||||
}
|
||||
|
||||
int
|
||||
ext3_init_security(handle_t *handle, struct inode *inode, struct inode *dir)
|
||||
{
|
||||
int err;
|
||||
size_t len;
|
||||
void *value;
|
||||
char *name;
|
||||
|
||||
err = security_inode_init_security(inode, dir, &name, &value, &len);
|
||||
if (err) {
|
||||
if (err == -EOPNOTSUPP)
|
||||
return 0;
|
||||
return err;
|
||||
}
|
||||
err = ext3_xattr_set_handle(handle, inode, EXT3_XATTR_INDEX_SECURITY,
|
||||
name, value, len, 0);
|
||||
kfree(name);
|
||||
kfree(value);
|
||||
return err;
|
||||
}
|
||||
|
||||
struct xattr_handler ext3_xattr_security_handler = {
|
||||
.prefix = XATTR_SECURITY_PREFIX,
|
||||
.list = ext3_xattr_security_list,
|
||||
.get = ext3_xattr_security_get,
|
||||
.set = ext3_xattr_security_set,
|
||||
};
|
||||
62
fs/ext4/xattr_trusted.c
Normal file
62
fs/ext4/xattr_trusted.c
Normal file
@ -0,0 +1,62 @@
|
||||
/*
|
||||
* linux/fs/ext3/xattr_trusted.c
|
||||
* Handler for trusted extended attributes.
|
||||
*
|
||||
* Copyright (C) 2003 by Andreas Gruenbacher, <a.gruenbacher@computer.org>
|
||||
*/
|
||||
|
||||
#include <linux/module.h>
|
||||
#include <linux/string.h>
|
||||
#include <linux/capability.h>
|
||||
#include <linux/fs.h>
|
||||
#include <linux/smp_lock.h>
|
||||
#include <linux/ext3_jbd.h>
|
||||
#include <linux/ext3_fs.h>
|
||||
#include "xattr.h"
|
||||
|
||||
#define XATTR_TRUSTED_PREFIX "trusted."
|
||||
|
||||
static size_t
|
||||
ext3_xattr_trusted_list(struct inode *inode, char *list, size_t list_size,
|
||||
const char *name, size_t name_len)
|
||||
{
|
||||
const size_t prefix_len = sizeof(XATTR_TRUSTED_PREFIX)-1;
|
||||
const size_t total_len = prefix_len + name_len + 1;
|
||||
|
||||
if (!capable(CAP_SYS_ADMIN))
|
||||
return 0;
|
||||
|
||||
if (list && total_len <= list_size) {
|
||||
memcpy(list, XATTR_TRUSTED_PREFIX, prefix_len);
|
||||
memcpy(list+prefix_len, name, name_len);
|
||||
list[prefix_len + name_len] = '\0';
|
||||
}
|
||||
return total_len;
|
||||
}
|
||||
|
||||
static int
|
||||
ext3_xattr_trusted_get(struct inode *inode, const char *name,
|
||||
void *buffer, size_t size)
|
||||
{
|
||||
if (strcmp(name, "") == 0)
|
||||
return -EINVAL;
|
||||
return ext3_xattr_get(inode, EXT3_XATTR_INDEX_TRUSTED, name,
|
||||
buffer, size);
|
||||
}
|
||||
|
||||
static int
|
||||
ext3_xattr_trusted_set(struct inode *inode, const char *name,
|
||||
const void *value, size_t size, int flags)
|
||||
{
|
||||
if (strcmp(name, "") == 0)
|
||||
return -EINVAL;
|
||||
return ext3_xattr_set(inode, EXT3_XATTR_INDEX_TRUSTED, name,
|
||||
value, size, flags);
|
||||
}
|
||||
|
||||
struct xattr_handler ext3_xattr_trusted_handler = {
|
||||
.prefix = XATTR_TRUSTED_PREFIX,
|
||||
.list = ext3_xattr_trusted_list,
|
||||
.get = ext3_xattr_trusted_get,
|
||||
.set = ext3_xattr_trusted_set,
|
||||
};
|
||||
64
fs/ext4/xattr_user.c
Normal file
64
fs/ext4/xattr_user.c
Normal file
@ -0,0 +1,64 @@
|
||||
/*
|
||||
* linux/fs/ext3/xattr_user.c
|
||||
* Handler for extended user attributes.
|
||||
*
|
||||
* Copyright (C) 2001 by Andreas Gruenbacher, <a.gruenbacher@computer.org>
|
||||
*/
|
||||
|
||||
#include <linux/module.h>
|
||||
#include <linux/string.h>
|
||||
#include <linux/fs.h>
|
||||
#include <linux/smp_lock.h>
|
||||
#include <linux/ext3_jbd.h>
|
||||
#include <linux/ext3_fs.h>
|
||||
#include "xattr.h"
|
||||
|
||||
#define XATTR_USER_PREFIX "user."
|
||||
|
||||
static size_t
|
||||
ext3_xattr_user_list(struct inode *inode, char *list, size_t list_size,
|
||||
const char *name, size_t name_len)
|
||||
{
|
||||
const size_t prefix_len = sizeof(XATTR_USER_PREFIX)-1;
|
||||
const size_t total_len = prefix_len + name_len + 1;
|
||||
|
||||
if (!test_opt(inode->i_sb, XATTR_USER))
|
||||
return 0;
|
||||
|
||||
if (list && total_len <= list_size) {
|
||||
memcpy(list, XATTR_USER_PREFIX, prefix_len);
|
||||
memcpy(list+prefix_len, name, name_len);
|
||||
list[prefix_len + name_len] = '\0';
|
||||
}
|
||||
return total_len;
|
||||
}
|
||||
|
||||
static int
|
||||
ext3_xattr_user_get(struct inode *inode, const char *name,
|
||||
void *buffer, size_t size)
|
||||
{
|
||||
if (strcmp(name, "") == 0)
|
||||
return -EINVAL;
|
||||
if (!test_opt(inode->i_sb, XATTR_USER))
|
||||
return -EOPNOTSUPP;
|
||||
return ext3_xattr_get(inode, EXT3_XATTR_INDEX_USER, name, buffer, size);
|
||||
}
|
||||
|
||||
static int
|
||||
ext3_xattr_user_set(struct inode *inode, const char *name,
|
||||
const void *value, size_t size, int flags)
|
||||
{
|
||||
if (strcmp(name, "") == 0)
|
||||
return -EINVAL;
|
||||
if (!test_opt(inode->i_sb, XATTR_USER))
|
||||
return -EOPNOTSUPP;
|
||||
return ext3_xattr_set(inode, EXT3_XATTR_INDEX_USER, name,
|
||||
value, size, flags);
|
||||
}
|
||||
|
||||
struct xattr_handler ext3_xattr_user_handler = {
|
||||
.prefix = XATTR_USER_PREFIX,
|
||||
.list = ext3_xattr_user_list,
|
||||
.get = ext3_xattr_user_get,
|
||||
.set = ext3_xattr_user_set,
|
||||
};
|
||||
885
include/linux/ext4_fs.h
Normal file
885
include/linux/ext4_fs.h
Normal file
@ -0,0 +1,885 @@
|
||||
/*
|
||||
* linux/include/linux/ext3_fs.h
|
||||
*
|
||||
* Copyright (C) 1992, 1993, 1994, 1995
|
||||
* Remy Card (card@masi.ibp.fr)
|
||||
* Laboratoire MASI - Institut Blaise Pascal
|
||||
* Universite Pierre et Marie Curie (Paris VI)
|
||||
*
|
||||
* from
|
||||
*
|
||||
* linux/include/linux/minix_fs.h
|
||||
*
|
||||
* Copyright (C) 1991, 1992 Linus Torvalds
|
||||
*/
|
||||
|
||||
#ifndef _LINUX_EXT3_FS_H
|
||||
#define _LINUX_EXT3_FS_H
|
||||
|
||||
#include <linux/types.h>
|
||||
#include <linux/magic.h>
|
||||
|
||||
/*
|
||||
* The second extended filesystem constants/structures
|
||||
*/
|
||||
|
||||
/*
|
||||
* Define EXT3FS_DEBUG to produce debug messages
|
||||
*/
|
||||
#undef EXT3FS_DEBUG
|
||||
|
||||
/*
|
||||
* Define EXT3_RESERVATION to reserve data blocks for expanding files
|
||||
*/
|
||||
#define EXT3_DEFAULT_RESERVE_BLOCKS 8
|
||||
/*max window size: 1024(direct blocks) + 3([t,d]indirect blocks) */
|
||||
#define EXT3_MAX_RESERVE_BLOCKS 1027
|
||||
#define EXT3_RESERVE_WINDOW_NOT_ALLOCATED 0
|
||||
/*
|
||||
* Always enable hashed directories
|
||||
*/
|
||||
#define CONFIG_EXT3_INDEX
|
||||
|
||||
/*
|
||||
* Debug code
|
||||
*/
|
||||
#ifdef EXT3FS_DEBUG
|
||||
#define ext3_debug(f, a...) \
|
||||
do { \
|
||||
printk (KERN_DEBUG "EXT3-fs DEBUG (%s, %d): %s:", \
|
||||
__FILE__, __LINE__, __FUNCTION__); \
|
||||
printk (KERN_DEBUG f, ## a); \
|
||||
} while (0)
|
||||
#else
|
||||
#define ext3_debug(f, a...) do {} while (0)
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Special inodes numbers
|
||||
*/
|
||||
#define EXT3_BAD_INO 1 /* Bad blocks inode */
|
||||
#define EXT3_ROOT_INO 2 /* Root inode */
|
||||
#define EXT3_BOOT_LOADER_INO 5 /* Boot loader inode */
|
||||
#define EXT3_UNDEL_DIR_INO 6 /* Undelete directory inode */
|
||||
#define EXT3_RESIZE_INO 7 /* Reserved group descriptors inode */
|
||||
#define EXT3_JOURNAL_INO 8 /* Journal inode */
|
||||
|
||||
/* First non-reserved inode for old ext3 filesystems */
|
||||
#define EXT3_GOOD_OLD_FIRST_INO 11
|
||||
|
||||
/*
|
||||
* Maximal count of links to a file
|
||||
*/
|
||||
#define EXT3_LINK_MAX 32000
|
||||
|
||||
/*
|
||||
* Macro-instructions used to manage several block sizes
|
||||
*/
|
||||
#define EXT3_MIN_BLOCK_SIZE 1024
|
||||
#define EXT3_MAX_BLOCK_SIZE 4096
|
||||
#define EXT3_MIN_BLOCK_LOG_SIZE 10
|
||||
#ifdef __KERNEL__
|
||||
# define EXT3_BLOCK_SIZE(s) ((s)->s_blocksize)
|
||||
#else
|
||||
# define EXT3_BLOCK_SIZE(s) (EXT3_MIN_BLOCK_SIZE << (s)->s_log_block_size)
|
||||
#endif
|
||||
#define EXT3_ADDR_PER_BLOCK(s) (EXT3_BLOCK_SIZE(s) / sizeof (__u32))
|
||||
#ifdef __KERNEL__
|
||||
# define EXT3_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits)
|
||||
#else
|
||||
# define EXT3_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10)
|
||||
#endif
|
||||
#ifdef __KERNEL__
|
||||
#define EXT3_ADDR_PER_BLOCK_BITS(s) (EXT3_SB(s)->s_addr_per_block_bits)
|
||||
#define EXT3_INODE_SIZE(s) (EXT3_SB(s)->s_inode_size)
|
||||
#define EXT3_FIRST_INO(s) (EXT3_SB(s)->s_first_ino)
|
||||
#else
|
||||
#define EXT3_INODE_SIZE(s) (((s)->s_rev_level == EXT3_GOOD_OLD_REV) ? \
|
||||
EXT3_GOOD_OLD_INODE_SIZE : \
|
||||
(s)->s_inode_size)
|
||||
#define EXT3_FIRST_INO(s) (((s)->s_rev_level == EXT3_GOOD_OLD_REV) ? \
|
||||
EXT3_GOOD_OLD_FIRST_INO : \
|
||||
(s)->s_first_ino)
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Macro-instructions used to manage fragments
|
||||
*/
|
||||
#define EXT3_MIN_FRAG_SIZE 1024
|
||||
#define EXT3_MAX_FRAG_SIZE 4096
|
||||
#define EXT3_MIN_FRAG_LOG_SIZE 10
|
||||
#ifdef __KERNEL__
|
||||
# define EXT3_FRAG_SIZE(s) (EXT3_SB(s)->s_frag_size)
|
||||
# define EXT3_FRAGS_PER_BLOCK(s) (EXT3_SB(s)->s_frags_per_block)
|
||||
#else
|
||||
# define EXT3_FRAG_SIZE(s) (EXT3_MIN_FRAG_SIZE << (s)->s_log_frag_size)
|
||||
# define EXT3_FRAGS_PER_BLOCK(s) (EXT3_BLOCK_SIZE(s) / EXT3_FRAG_SIZE(s))
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Structure of a blocks group descriptor
|
||||
*/
|
||||
struct ext3_group_desc
|
||||
{
|
||||
__le32 bg_block_bitmap; /* Blocks bitmap block */
|
||||
__le32 bg_inode_bitmap; /* Inodes bitmap block */
|
||||
__le32 bg_inode_table; /* Inodes table block */
|
||||
__le16 bg_free_blocks_count; /* Free blocks count */
|
||||
__le16 bg_free_inodes_count; /* Free inodes count */
|
||||
__le16 bg_used_dirs_count; /* Directories count */
|
||||
__u16 bg_pad;
|
||||
__le32 bg_reserved[3];
|
||||
};
|
||||
|
||||
/*
|
||||
* Macro-instructions used to manage group descriptors
|
||||
*/
|
||||
#ifdef __KERNEL__
|
||||
# define EXT3_BLOCKS_PER_GROUP(s) (EXT3_SB(s)->s_blocks_per_group)
|
||||
# define EXT3_DESC_PER_BLOCK(s) (EXT3_SB(s)->s_desc_per_block)
|
||||
# define EXT3_INODES_PER_GROUP(s) (EXT3_SB(s)->s_inodes_per_group)
|
||||
# define EXT3_DESC_PER_BLOCK_BITS(s) (EXT3_SB(s)->s_desc_per_block_bits)
|
||||
#else
|
||||
# define EXT3_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group)
|
||||
# define EXT3_DESC_PER_BLOCK(s) (EXT3_BLOCK_SIZE(s) / sizeof (struct ext3_group_desc))
|
||||
# define EXT3_INODES_PER_GROUP(s) ((s)->s_inodes_per_group)
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Constants relative to the data blocks
|
||||
*/
|
||||
#define EXT3_NDIR_BLOCKS 12
|
||||
#define EXT3_IND_BLOCK EXT3_NDIR_BLOCKS
|
||||
#define EXT3_DIND_BLOCK (EXT3_IND_BLOCK + 1)
|
||||
#define EXT3_TIND_BLOCK (EXT3_DIND_BLOCK + 1)
|
||||
#define EXT3_N_BLOCKS (EXT3_TIND_BLOCK + 1)
|
||||
|
||||
/*
|
||||
* Inode flags
|
||||
*/
|
||||
#define EXT3_SECRM_FL 0x00000001 /* Secure deletion */
|
||||
#define EXT3_UNRM_FL 0x00000002 /* Undelete */
|
||||
#define EXT3_COMPR_FL 0x00000004 /* Compress file */
|
||||
#define EXT3_SYNC_FL 0x00000008 /* Synchronous updates */
|
||||
#define EXT3_IMMUTABLE_FL 0x00000010 /* Immutable file */
|
||||
#define EXT3_APPEND_FL 0x00000020 /* writes to file may only append */
|
||||
#define EXT3_NODUMP_FL 0x00000040 /* do not dump file */
|
||||
#define EXT3_NOATIME_FL 0x00000080 /* do not update atime */
|
||||
/* Reserved for compression usage... */
|
||||
#define EXT3_DIRTY_FL 0x00000100
|
||||
#define EXT3_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */
|
||||
#define EXT3_NOCOMPR_FL 0x00000400 /* Don't compress */
|
||||
#define EXT3_ECOMPR_FL 0x00000800 /* Compression error */
|
||||
/* End compression flags --- maybe not all used */
|
||||
#define EXT3_INDEX_FL 0x00001000 /* hash-indexed directory */
|
||||
#define EXT3_IMAGIC_FL 0x00002000 /* AFS directory */
|
||||
#define EXT3_JOURNAL_DATA_FL 0x00004000 /* file data should be journaled */
|
||||
#define EXT3_NOTAIL_FL 0x00008000 /* file tail should not be merged */
|
||||
#define EXT3_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */
|
||||
#define EXT3_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/
|
||||
#define EXT3_RESERVED_FL 0x80000000 /* reserved for ext3 lib */
|
||||
|
||||
#define EXT3_FL_USER_VISIBLE 0x0003DFFF /* User visible flags */
|
||||
#define EXT3_FL_USER_MODIFIABLE 0x000380FF /* User modifiable flags */
|
||||
|
||||
/*
|
||||
* Inode dynamic state flags
|
||||
*/
|
||||
#define EXT3_STATE_JDATA 0x00000001 /* journaled data exists */
|
||||
#define EXT3_STATE_NEW 0x00000002 /* inode is newly created */
|
||||
#define EXT3_STATE_XATTR 0x00000004 /* has in-inode xattrs */
|
||||
|
||||
/* Used to pass group descriptor data when online resize is done */
|
||||
struct ext3_new_group_input {
|
||||
__u32 group; /* Group number for this data */
|
||||
__u32 block_bitmap; /* Absolute block number of block bitmap */
|
||||
__u32 inode_bitmap; /* Absolute block number of inode bitmap */
|
||||
__u32 inode_table; /* Absolute block number of inode table start */
|
||||
__u32 blocks_count; /* Total number of blocks in this group */
|
||||
__u16 reserved_blocks; /* Number of reserved blocks in this group */
|
||||
__u16 unused;
|
||||
};
|
||||
|
||||
/* The struct ext3_new_group_input in kernel space, with free_blocks_count */
|
||||
struct ext3_new_group_data {
|
||||
__u32 group;
|
||||
__u32 block_bitmap;
|
||||
__u32 inode_bitmap;
|
||||
__u32 inode_table;
|
||||
__u32 blocks_count;
|
||||
__u16 reserved_blocks;
|
||||
__u16 unused;
|
||||
__u32 free_blocks_count;
|
||||
};
|
||||
|
||||
|
||||
/*
|
||||
* ioctl commands
|
||||
*/
|
||||
#define EXT3_IOC_GETFLAGS FS_IOC_GETFLAGS
|
||||
#define EXT3_IOC_SETFLAGS FS_IOC_SETFLAGS
|
||||
#define EXT3_IOC_GETVERSION _IOR('f', 3, long)
|
||||
#define EXT3_IOC_SETVERSION _IOW('f', 4, long)
|
||||
#define EXT3_IOC_GROUP_EXTEND _IOW('f', 7, unsigned long)
|
||||
#define EXT3_IOC_GROUP_ADD _IOW('f', 8,struct ext3_new_group_input)
|
||||
#define EXT3_IOC_GETVERSION_OLD FS_IOC_GETVERSION
|
||||
#define EXT3_IOC_SETVERSION_OLD FS_IOC_SETVERSION
|
||||
#ifdef CONFIG_JBD_DEBUG
|
||||
#define EXT3_IOC_WAIT_FOR_READONLY _IOR('f', 99, long)
|
||||
#endif
|
||||
#define EXT3_IOC_GETRSVSZ _IOR('f', 5, long)
|
||||
#define EXT3_IOC_SETRSVSZ _IOW('f', 6, long)
|
||||
|
||||
/*
|
||||
* ioctl commands in 32 bit emulation
|
||||
*/
|
||||
#define EXT3_IOC32_GETFLAGS FS_IOC32_GETFLAGS
|
||||
#define EXT3_IOC32_SETFLAGS FS_IOC32_SETFLAGS
|
||||
#define EXT3_IOC32_GETVERSION _IOR('f', 3, int)
|
||||
#define EXT3_IOC32_SETVERSION _IOW('f', 4, int)
|
||||
#define EXT3_IOC32_GETRSVSZ _IOR('f', 5, int)
|
||||
#define EXT3_IOC32_SETRSVSZ _IOW('f', 6, int)
|
||||
#define EXT3_IOC32_GROUP_EXTEND _IOW('f', 7, unsigned int)
|
||||
#ifdef CONFIG_JBD_DEBUG
|
||||
#define EXT3_IOC32_WAIT_FOR_READONLY _IOR('f', 99, int)
|
||||
#endif
|
||||
#define EXT3_IOC32_GETVERSION_OLD FS_IOC32_GETVERSION
|
||||
#define EXT3_IOC32_SETVERSION_OLD FS_IOC32_SETVERSION
|
||||
|
||||
|
||||
/*
|
||||
* Mount options
|
||||
*/
|
||||
struct ext3_mount_options {
|
||||
unsigned long s_mount_opt;
|
||||
uid_t s_resuid;
|
||||
gid_t s_resgid;
|
||||
unsigned long s_commit_interval;
|
||||
#ifdef CONFIG_QUOTA
|
||||
int s_jquota_fmt;
|
||||
char *s_qf_names[MAXQUOTAS];
|
||||
#endif
|
||||
};
|
||||
|
||||
/*
|
||||
* Structure of an inode on the disk
|
||||
*/
|
||||
struct ext3_inode {
|
||||
__le16 i_mode; /* File mode */
|
||||
__le16 i_uid; /* Low 16 bits of Owner Uid */
|
||||
__le32 i_size; /* Size in bytes */
|
||||
__le32 i_atime; /* Access time */
|
||||
__le32 i_ctime; /* Creation time */
|
||||
__le32 i_mtime; /* Modification time */
|
||||
__le32 i_dtime; /* Deletion Time */
|
||||
__le16 i_gid; /* Low 16 bits of Group Id */
|
||||
__le16 i_links_count; /* Links count */
|
||||
__le32 i_blocks; /* Blocks count */
|
||||
__le32 i_flags; /* File flags */
|
||||
union {
|
||||
struct {
|
||||
__u32 l_i_reserved1;
|
||||
} linux1;
|
||||
struct {
|
||||
__u32 h_i_translator;
|
||||
} hurd1;
|
||||
struct {
|
||||
__u32 m_i_reserved1;
|
||||
} masix1;
|
||||
} osd1; /* OS dependent 1 */
|
||||
__le32 i_block[EXT3_N_BLOCKS];/* Pointers to blocks */
|
||||
__le32 i_generation; /* File version (for NFS) */
|
||||
__le32 i_file_acl; /* File ACL */
|
||||
__le32 i_dir_acl; /* Directory ACL */
|
||||
__le32 i_faddr; /* Fragment address */
|
||||
union {
|
||||
struct {
|
||||
__u8 l_i_frag; /* Fragment number */
|
||||
__u8 l_i_fsize; /* Fragment size */
|
||||
__u16 i_pad1;
|
||||
__le16 l_i_uid_high; /* these 2 fields */
|
||||
__le16 l_i_gid_high; /* were reserved2[0] */
|
||||
__u32 l_i_reserved2;
|
||||
} linux2;
|
||||
struct {
|
||||
__u8 h_i_frag; /* Fragment number */
|
||||
__u8 h_i_fsize; /* Fragment size */
|
||||
__u16 h_i_mode_high;
|
||||
__u16 h_i_uid_high;
|
||||
__u16 h_i_gid_high;
|
||||
__u32 h_i_author;
|
||||
} hurd2;
|
||||
struct {
|
||||
__u8 m_i_frag; /* Fragment number */
|
||||
__u8 m_i_fsize; /* Fragment size */
|
||||
__u16 m_pad1;
|
||||
__u32 m_i_reserved2[2];
|
||||
} masix2;
|
||||
} osd2; /* OS dependent 2 */
|
||||
__le16 i_extra_isize;
|
||||
__le16 i_pad1;
|
||||
};
|
||||
|
||||
#define i_size_high i_dir_acl
|
||||
|
||||
#if defined(__KERNEL__) || defined(__linux__)
|
||||
#define i_reserved1 osd1.linux1.l_i_reserved1
|
||||
#define i_frag osd2.linux2.l_i_frag
|
||||
#define i_fsize osd2.linux2.l_i_fsize
|
||||
#define i_uid_low i_uid
|
||||
#define i_gid_low i_gid
|
||||
#define i_uid_high osd2.linux2.l_i_uid_high
|
||||
#define i_gid_high osd2.linux2.l_i_gid_high
|
||||
#define i_reserved2 osd2.linux2.l_i_reserved2
|
||||
|
||||
#elif defined(__GNU__)
|
||||
|
||||
#define i_translator osd1.hurd1.h_i_translator
|
||||
#define i_frag osd2.hurd2.h_i_frag;
|
||||
#define i_fsize osd2.hurd2.h_i_fsize;
|
||||
#define i_uid_high osd2.hurd2.h_i_uid_high
|
||||
#define i_gid_high osd2.hurd2.h_i_gid_high
|
||||
#define i_author osd2.hurd2.h_i_author
|
||||
|
||||
#elif defined(__masix__)
|
||||
|
||||
#define i_reserved1 osd1.masix1.m_i_reserved1
|
||||
#define i_frag osd2.masix2.m_i_frag
|
||||
#define i_fsize osd2.masix2.m_i_fsize
|
||||
#define i_reserved2 osd2.masix2.m_i_reserved2
|
||||
|
||||
#endif /* defined(__KERNEL__) || defined(__linux__) */
|
||||
|
||||
/*
|
||||
* File system states
|
||||
*/
|
||||
#define EXT3_VALID_FS 0x0001 /* Unmounted cleanly */
|
||||
#define EXT3_ERROR_FS 0x0002 /* Errors detected */
|
||||
#define EXT3_ORPHAN_FS 0x0004 /* Orphans being recovered */
|
||||
|
||||
/*
|
||||
* Mount flags
|
||||
*/
|
||||
#define EXT3_MOUNT_CHECK 0x00001 /* Do mount-time checks */
|
||||
#define EXT3_MOUNT_OLDALLOC 0x00002 /* Don't use the new Orlov allocator */
|
||||
#define EXT3_MOUNT_GRPID 0x00004 /* Create files with directory's group */
|
||||
#define EXT3_MOUNT_DEBUG 0x00008 /* Some debugging messages */
|
||||
#define EXT3_MOUNT_ERRORS_CONT 0x00010 /* Continue on errors */
|
||||
#define EXT3_MOUNT_ERRORS_RO 0x00020 /* Remount fs ro on errors */
|
||||
#define EXT3_MOUNT_ERRORS_PANIC 0x00040 /* Panic on errors */
|
||||
#define EXT3_MOUNT_MINIX_DF 0x00080 /* Mimics the Minix statfs */
|
||||
#define EXT3_MOUNT_NOLOAD 0x00100 /* Don't use existing journal*/
|
||||
#define EXT3_MOUNT_ABORT 0x00200 /* Fatal error detected */
|
||||
#define EXT3_MOUNT_DATA_FLAGS 0x00C00 /* Mode for data writes: */
|
||||
#define EXT3_MOUNT_JOURNAL_DATA 0x00400 /* Write data to journal */
|
||||
#define EXT3_MOUNT_ORDERED_DATA 0x00800 /* Flush data before commit */
|
||||
#define EXT3_MOUNT_WRITEBACK_DATA 0x00C00 /* No data ordering */
|
||||
#define EXT3_MOUNT_UPDATE_JOURNAL 0x01000 /* Update the journal format */
|
||||
#define EXT3_MOUNT_NO_UID32 0x02000 /* Disable 32-bit UIDs */
|
||||
#define EXT3_MOUNT_XATTR_USER 0x04000 /* Extended user attributes */
|
||||
#define EXT3_MOUNT_POSIX_ACL 0x08000 /* POSIX Access Control Lists */
|
||||
#define EXT3_MOUNT_RESERVATION 0x10000 /* Preallocation */
|
||||
#define EXT3_MOUNT_BARRIER 0x20000 /* Use block barriers */
|
||||
#define EXT3_MOUNT_NOBH 0x40000 /* No bufferheads */
|
||||
#define EXT3_MOUNT_QUOTA 0x80000 /* Some quota option set */
|
||||
#define EXT3_MOUNT_USRQUOTA 0x100000 /* "old" user quota */
|
||||
#define EXT3_MOUNT_GRPQUOTA 0x200000 /* "old" group quota */
|
||||
|
||||
/* Compatibility, for having both ext2_fs.h and ext3_fs.h included at once */
|
||||
#ifndef _LINUX_EXT2_FS_H
|
||||
#define clear_opt(o, opt) o &= ~EXT3_MOUNT_##opt
|
||||
#define set_opt(o, opt) o |= EXT3_MOUNT_##opt
|
||||
#define test_opt(sb, opt) (EXT3_SB(sb)->s_mount_opt & \
|
||||
EXT3_MOUNT_##opt)
|
||||
#else
|
||||
#define EXT2_MOUNT_NOLOAD EXT3_MOUNT_NOLOAD
|
||||
#define EXT2_MOUNT_ABORT EXT3_MOUNT_ABORT
|
||||
#define EXT2_MOUNT_DATA_FLAGS EXT3_MOUNT_DATA_FLAGS
|
||||
#endif
|
||||
|
||||
#define ext3_set_bit ext2_set_bit
|
||||
#define ext3_set_bit_atomic ext2_set_bit_atomic
|
||||
#define ext3_clear_bit ext2_clear_bit
|
||||
#define ext3_clear_bit_atomic ext2_clear_bit_atomic
|
||||
#define ext3_test_bit ext2_test_bit
|
||||
#define ext3_find_first_zero_bit ext2_find_first_zero_bit
|
||||
#define ext3_find_next_zero_bit ext2_find_next_zero_bit
|
||||
|
||||
/*
|
||||
* Maximal mount counts between two filesystem checks
|
||||
*/
|
||||
#define EXT3_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */
|
||||
#define EXT3_DFL_CHECKINTERVAL 0 /* Don't use interval check */
|
||||
|
||||
/*
|
||||
* Behaviour when detecting errors
|
||||
*/
|
||||
#define EXT3_ERRORS_CONTINUE 1 /* Continue execution */
|
||||
#define EXT3_ERRORS_RO 2 /* Remount fs read-only */
|
||||
#define EXT3_ERRORS_PANIC 3 /* Panic */
|
||||
#define EXT3_ERRORS_DEFAULT EXT3_ERRORS_CONTINUE
|
||||
|
||||
/*
|
||||
* Structure of the super block
|
||||
*/
|
||||
struct ext3_super_block {
|
||||
/*00*/ __le32 s_inodes_count; /* Inodes count */
|
||||
__le32 s_blocks_count; /* Blocks count */
|
||||
__le32 s_r_blocks_count; /* Reserved blocks count */
|
||||
__le32 s_free_blocks_count; /* Free blocks count */
|
||||
/*10*/ __le32 s_free_inodes_count; /* Free inodes count */
|
||||
__le32 s_first_data_block; /* First Data Block */
|
||||
__le32 s_log_block_size; /* Block size */
|
||||
__le32 s_log_frag_size; /* Fragment size */
|
||||
/*20*/ __le32 s_blocks_per_group; /* # Blocks per group */
|
||||
__le32 s_frags_per_group; /* # Fragments per group */
|
||||
__le32 s_inodes_per_group; /* # Inodes per group */
|
||||
__le32 s_mtime; /* Mount time */
|
||||
/*30*/ __le32 s_wtime; /* Write time */
|
||||
__le16 s_mnt_count; /* Mount count */
|
||||
__le16 s_max_mnt_count; /* Maximal mount count */
|
||||
__le16 s_magic; /* Magic signature */
|
||||
__le16 s_state; /* File system state */
|
||||
__le16 s_errors; /* Behaviour when detecting errors */
|
||||
__le16 s_minor_rev_level; /* minor revision level */
|
||||
/*40*/ __le32 s_lastcheck; /* time of last check */
|
||||
__le32 s_checkinterval; /* max. time between checks */
|
||||
__le32 s_creator_os; /* OS */
|
||||
__le32 s_rev_level; /* Revision level */
|
||||
/*50*/ __le16 s_def_resuid; /* Default uid for reserved blocks */
|
||||
__le16 s_def_resgid; /* Default gid for reserved blocks */
|
||||
/*
|
||||
* These fields are for EXT3_DYNAMIC_REV superblocks only.
|
||||
*
|
||||
* Note: the difference between the compatible feature set and
|
||||
* the incompatible feature set is that if there is a bit set
|
||||
* in the incompatible feature set that the kernel doesn't
|
||||
* know about, it should refuse to mount the filesystem.
|
||||
*
|
||||
* e2fsck's requirements are more strict; if it doesn't know
|
||||
* about a feature in either the compatible or incompatible
|
||||
* feature set, it must abort and not try to meddle with
|
||||
* things it doesn't understand...
|
||||
*/
|
||||
__le32 s_first_ino; /* First non-reserved inode */
|
||||
__le16 s_inode_size; /* size of inode structure */
|
||||
__le16 s_block_group_nr; /* block group # of this superblock */
|
||||
__le32 s_feature_compat; /* compatible feature set */
|
||||
/*60*/ __le32 s_feature_incompat; /* incompatible feature set */
|
||||
__le32 s_feature_ro_compat; /* readonly-compatible feature set */
|
||||
/*68*/ __u8 s_uuid[16]; /* 128-bit uuid for volume */
|
||||
/*78*/ char s_volume_name[16]; /* volume name */
|
||||
/*88*/ char s_last_mounted[64]; /* directory where last mounted */
|
||||
/*C8*/ __le32 s_algorithm_usage_bitmap; /* For compression */
|
||||
/*
|
||||
* Performance hints. Directory preallocation should only
|
||||
* happen if the EXT3_FEATURE_COMPAT_DIR_PREALLOC flag is on.
|
||||
*/
|
||||
__u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/
|
||||
__u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */
|
||||
__le16 s_reserved_gdt_blocks; /* Per group desc for online growth */
|
||||
/*
|
||||
* Journaling support valid if EXT3_FEATURE_COMPAT_HAS_JOURNAL set.
|
||||
*/
|
||||
/*D0*/ __u8 s_journal_uuid[16]; /* uuid of journal superblock */
|
||||
/*E0*/ __le32 s_journal_inum; /* inode number of journal file */
|
||||
__le32 s_journal_dev; /* device number of journal file */
|
||||
__le32 s_last_orphan; /* start of list of inodes to delete */
|
||||
__le32 s_hash_seed[4]; /* HTREE hash seed */
|
||||
__u8 s_def_hash_version; /* Default hash version to use */
|
||||
__u8 s_reserved_char_pad;
|
||||
__u16 s_reserved_word_pad;
|
||||
__le32 s_default_mount_opts;
|
||||
__le32 s_first_meta_bg; /* First metablock block group */
|
||||
__u32 s_reserved[190]; /* Padding to the end of the block */
|
||||
};
|
||||
|
||||
#ifdef __KERNEL__
|
||||
#include <linux/ext3_fs_i.h>
|
||||
#include <linux/ext3_fs_sb.h>
|
||||
static inline struct ext3_sb_info * EXT3_SB(struct super_block *sb)
|
||||
{
|
||||
return sb->s_fs_info;
|
||||
}
|
||||
static inline struct ext3_inode_info *EXT3_I(struct inode *inode)
|
||||
{
|
||||
return container_of(inode, struct ext3_inode_info, vfs_inode);
|
||||
}
|
||||
|
||||
static inline int ext3_valid_inum(struct super_block *sb, unsigned long ino)
|
||||
{
|
||||
return ino == EXT3_ROOT_INO ||
|
||||
ino == EXT3_JOURNAL_INO ||
|
||||
ino == EXT3_RESIZE_INO ||
|
||||
(ino >= EXT3_FIRST_INO(sb) &&
|
||||
ino <= le32_to_cpu(EXT3_SB(sb)->s_es->s_inodes_count));
|
||||
}
|
||||
#else
|
||||
/* Assume that user mode programs are passing in an ext3fs superblock, not
|
||||
* a kernel struct super_block. This will allow us to call the feature-test
|
||||
* macros from user land. */
|
||||
#define EXT3_SB(sb) (sb)
|
||||
#endif
|
||||
|
||||
#define NEXT_ORPHAN(inode) EXT3_I(inode)->i_dtime
|
||||
|
||||
/*
|
||||
* Codes for operating systems
|
||||
*/
|
||||
#define EXT3_OS_LINUX 0
|
||||
#define EXT3_OS_HURD 1
|
||||
#define EXT3_OS_MASIX 2
|
||||
#define EXT3_OS_FREEBSD 3
|
||||
#define EXT3_OS_LITES 4
|
||||
|
||||
/*
|
||||
* Revision levels
|
||||
*/
|
||||
#define EXT3_GOOD_OLD_REV 0 /* The good old (original) format */
|
||||
#define EXT3_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */
|
||||
|
||||
#define EXT3_CURRENT_REV EXT3_GOOD_OLD_REV
|
||||
#define EXT3_MAX_SUPP_REV EXT3_DYNAMIC_REV
|
||||
|
||||
#define EXT3_GOOD_OLD_INODE_SIZE 128
|
||||
|
||||
/*
|
||||
* Feature set definitions
|
||||
*/
|
||||
|
||||
#define EXT3_HAS_COMPAT_FEATURE(sb,mask) \
|
||||
( EXT3_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask) )
|
||||
#define EXT3_HAS_RO_COMPAT_FEATURE(sb,mask) \
|
||||
( EXT3_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask) )
|
||||
#define EXT3_HAS_INCOMPAT_FEATURE(sb,mask) \
|
||||
( EXT3_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask) )
|
||||
#define EXT3_SET_COMPAT_FEATURE(sb,mask) \
|
||||
EXT3_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask)
|
||||
#define EXT3_SET_RO_COMPAT_FEATURE(sb,mask) \
|
||||
EXT3_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask)
|
||||
#define EXT3_SET_INCOMPAT_FEATURE(sb,mask) \
|
||||
EXT3_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask)
|
||||
#define EXT3_CLEAR_COMPAT_FEATURE(sb,mask) \
|
||||
EXT3_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask)
|
||||
#define EXT3_CLEAR_RO_COMPAT_FEATURE(sb,mask) \
|
||||
EXT3_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask)
|
||||
#define EXT3_CLEAR_INCOMPAT_FEATURE(sb,mask) \
|
||||
EXT3_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask)
|
||||
|
||||
#define EXT3_FEATURE_COMPAT_DIR_PREALLOC 0x0001
|
||||
#define EXT3_FEATURE_COMPAT_IMAGIC_INODES 0x0002
|
||||
#define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004
|
||||
#define EXT3_FEATURE_COMPAT_EXT_ATTR 0x0008
|
||||
#define EXT3_FEATURE_COMPAT_RESIZE_INODE 0x0010
|
||||
#define EXT3_FEATURE_COMPAT_DIR_INDEX 0x0020
|
||||
|
||||
#define EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
|
||||
#define EXT3_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
|
||||
#define EXT3_FEATURE_RO_COMPAT_BTREE_DIR 0x0004
|
||||
|
||||
#define EXT3_FEATURE_INCOMPAT_COMPRESSION 0x0001
|
||||
#define EXT3_FEATURE_INCOMPAT_FILETYPE 0x0002
|
||||
#define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */
|
||||
#define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */
|
||||
#define EXT3_FEATURE_INCOMPAT_META_BG 0x0010
|
||||
|
||||
#define EXT3_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR
|
||||
#define EXT3_FEATURE_INCOMPAT_SUPP (EXT3_FEATURE_INCOMPAT_FILETYPE| \
|
||||
EXT3_FEATURE_INCOMPAT_RECOVER| \
|
||||
EXT3_FEATURE_INCOMPAT_META_BG)
|
||||
#define EXT3_FEATURE_RO_COMPAT_SUPP (EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER| \
|
||||
EXT3_FEATURE_RO_COMPAT_LARGE_FILE| \
|
||||
EXT3_FEATURE_RO_COMPAT_BTREE_DIR)
|
||||
|
||||
/*
|
||||
* Default values for user and/or group using reserved blocks
|
||||
*/
|
||||
#define EXT3_DEF_RESUID 0
|
||||
#define EXT3_DEF_RESGID 0
|
||||
|
||||
/*
|
||||
* Default mount options
|
||||
*/
|
||||
#define EXT3_DEFM_DEBUG 0x0001
|
||||
#define EXT3_DEFM_BSDGROUPS 0x0002
|
||||
#define EXT3_DEFM_XATTR_USER 0x0004
|
||||
#define EXT3_DEFM_ACL 0x0008
|
||||
#define EXT3_DEFM_UID16 0x0010
|
||||
#define EXT3_DEFM_JMODE 0x0060
|
||||
#define EXT3_DEFM_JMODE_DATA 0x0020
|
||||
#define EXT3_DEFM_JMODE_ORDERED 0x0040
|
||||
#define EXT3_DEFM_JMODE_WBACK 0x0060
|
||||
|
||||
/*
|
||||
* Structure of a directory entry
|
||||
*/
|
||||
#define EXT3_NAME_LEN 255
|
||||
|
||||
struct ext3_dir_entry {
|
||||
__le32 inode; /* Inode number */
|
||||
__le16 rec_len; /* Directory entry length */
|
||||
__le16 name_len; /* Name length */
|
||||
char name[EXT3_NAME_LEN]; /* File name */
|
||||
};
|
||||
|
||||
/*
|
||||
* The new version of the directory entry. Since EXT3 structures are
|
||||
* stored in intel byte order, and the name_len field could never be
|
||||
* bigger than 255 chars, it's safe to reclaim the extra byte for the
|
||||
* file_type field.
|
||||
*/
|
||||
struct ext3_dir_entry_2 {
|
||||
__le32 inode; /* Inode number */
|
||||
__le16 rec_len; /* Directory entry length */
|
||||
__u8 name_len; /* Name length */
|
||||
__u8 file_type;
|
||||
char name[EXT3_NAME_LEN]; /* File name */
|
||||
};
|
||||
|
||||
/*
|
||||
* Ext3 directory file types. Only the low 3 bits are used. The
|
||||
* other bits are reserved for now.
|
||||
*/
|
||||
#define EXT3_FT_UNKNOWN 0
|
||||
#define EXT3_FT_REG_FILE 1
|
||||
#define EXT3_FT_DIR 2
|
||||
#define EXT3_FT_CHRDEV 3
|
||||
#define EXT3_FT_BLKDEV 4
|
||||
#define EXT3_FT_FIFO 5
|
||||
#define EXT3_FT_SOCK 6
|
||||
#define EXT3_FT_SYMLINK 7
|
||||
|
||||
#define EXT3_FT_MAX 8
|
||||
|
||||
/*
|
||||
* EXT3_DIR_PAD defines the directory entries boundaries
|
||||
*
|
||||
* NOTE: It must be a multiple of 4
|
||||
*/
|
||||
#define EXT3_DIR_PAD 4
|
||||
#define EXT3_DIR_ROUND (EXT3_DIR_PAD - 1)
|
||||
#define EXT3_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT3_DIR_ROUND) & \
|
||||
~EXT3_DIR_ROUND)
|
||||
/*
|
||||
* Hash Tree Directory indexing
|
||||
* (c) Daniel Phillips, 2001
|
||||
*/
|
||||
|
||||
#ifdef CONFIG_EXT3_INDEX
|
||||
#define is_dx(dir) (EXT3_HAS_COMPAT_FEATURE(dir->i_sb, \
|
||||
EXT3_FEATURE_COMPAT_DIR_INDEX) && \
|
||||
(EXT3_I(dir)->i_flags & EXT3_INDEX_FL))
|
||||
#define EXT3_DIR_LINK_MAX(dir) (!is_dx(dir) && (dir)->i_nlink >= EXT3_LINK_MAX)
|
||||
#define EXT3_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2 || (dir)->i_nlink == 1)
|
||||
#else
|
||||
#define is_dx(dir) 0
|
||||
#define EXT3_DIR_LINK_MAX(dir) ((dir)->i_nlink >= EXT3_LINK_MAX)
|
||||
#define EXT3_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2)
|
||||
#endif
|
||||
|
||||
/* Legal values for the dx_root hash_version field: */
|
||||
|
||||
#define DX_HASH_LEGACY 0
|
||||
#define DX_HASH_HALF_MD4 1
|
||||
#define DX_HASH_TEA 2
|
||||
|
||||
#ifdef __KERNEL__
|
||||
|
||||
/* hash info structure used by the directory hash */
|
||||
struct dx_hash_info
|
||||
{
|
||||
u32 hash;
|
||||
u32 minor_hash;
|
||||
int hash_version;
|
||||
u32 *seed;
|
||||
};
|
||||
|
||||
#define EXT3_HTREE_EOF 0x7fffffff
|
||||
|
||||
/*
|
||||
* Control parameters used by ext3_htree_next_block
|
||||
*/
|
||||
#define HASH_NB_ALWAYS 1
|
||||
|
||||
|
||||
/*
|
||||
* Describe an inode's exact location on disk and in memory
|
||||
*/
|
||||
struct ext3_iloc
|
||||
{
|
||||
struct buffer_head *bh;
|
||||
unsigned long offset;
|
||||
unsigned long block_group;
|
||||
};
|
||||
|
||||
static inline struct ext3_inode *ext3_raw_inode(struct ext3_iloc *iloc)
|
||||
{
|
||||
return (struct ext3_inode *) (iloc->bh->b_data + iloc->offset);
|
||||
}
|
||||
|
||||
/*
|
||||
* This structure is stuffed into the struct file's private_data field
|
||||
* for directories. It is where we put information so that we can do
|
||||
* readdir operations in hash tree order.
|
||||
*/
|
||||
struct dir_private_info {
|
||||
struct rb_root root;
|
||||
struct rb_node *curr_node;
|
||||
struct fname *extra_fname;
|
||||
loff_t last_pos;
|
||||
__u32 curr_hash;
|
||||
__u32 curr_minor_hash;
|
||||
__u32 next_hash;
|
||||
};
|
||||
|
||||
/* calculate the first block number of the group */
|
||||
static inline ext3_fsblk_t
|
||||
ext3_group_first_block_no(struct super_block *sb, unsigned long group_no)
|
||||
{
|
||||
return group_no * (ext3_fsblk_t)EXT3_BLOCKS_PER_GROUP(sb) +
|
||||
le32_to_cpu(EXT3_SB(sb)->s_es->s_first_data_block);
|
||||
}
|
||||
|
||||
/*
|
||||
* Special error return code only used by dx_probe() and its callers.
|
||||
*/
|
||||
#define ERR_BAD_DX_DIR -75000
|
||||
|
||||
/*
|
||||
* Function prototypes
|
||||
*/
|
||||
|
||||
/*
|
||||
* Ok, these declarations are also in <linux/kernel.h> but none of the
|
||||
* ext3 source programs needs to include it so they are duplicated here.
|
||||
*/
|
||||
# define NORET_TYPE /**/
|
||||
# define ATTRIB_NORET __attribute__((noreturn))
|
||||
# define NORET_AND noreturn,
|
||||
|
||||
/* balloc.c */
|
||||
extern int ext3_bg_has_super(struct super_block *sb, int group);
|
||||
extern unsigned long ext3_bg_num_gdb(struct super_block *sb, int group);
|
||||
extern ext3_fsblk_t ext3_new_block (handle_t *handle, struct inode *inode,
|
||||
ext3_fsblk_t goal, int *errp);
|
||||
extern ext3_fsblk_t ext3_new_blocks (handle_t *handle, struct inode *inode,
|
||||
ext3_fsblk_t goal, unsigned long *count, int *errp);
|
||||
extern void ext3_free_blocks (handle_t *handle, struct inode *inode,
|
||||
ext3_fsblk_t block, unsigned long count);
|
||||
extern void ext3_free_blocks_sb (handle_t *handle, struct super_block *sb,
|
||||
ext3_fsblk_t block, unsigned long count,
|
||||
unsigned long *pdquot_freed_blocks);
|
||||
extern ext3_fsblk_t ext3_count_free_blocks (struct super_block *);
|
||||
extern void ext3_check_blocks_bitmap (struct super_block *);
|
||||
extern struct ext3_group_desc * ext3_get_group_desc(struct super_block * sb,
|
||||
unsigned int block_group,
|
||||
struct buffer_head ** bh);
|
||||
extern int ext3_should_retry_alloc(struct super_block *sb, int *retries);
|
||||
extern void ext3_init_block_alloc_info(struct inode *);
|
||||
extern void ext3_rsv_window_add(struct super_block *sb, struct ext3_reserve_window_node *rsv);
|
||||
|
||||
/* dir.c */
|
||||
extern int ext3_check_dir_entry(const char *, struct inode *,
|
||||
struct ext3_dir_entry_2 *,
|
||||
struct buffer_head *, unsigned long);
|
||||
extern int ext3_htree_store_dirent(struct file *dir_file, __u32 hash,
|
||||
__u32 minor_hash,
|
||||
struct ext3_dir_entry_2 *dirent);
|
||||
extern void ext3_htree_free_dir_info(struct dir_private_info *p);
|
||||
|
||||
/* fsync.c */
|
||||
extern int ext3_sync_file (struct file *, struct dentry *, int);
|
||||
|
||||
/* hash.c */
|
||||
extern int ext3fs_dirhash(const char *name, int len, struct
|
||||
dx_hash_info *hinfo);
|
||||
|
||||
/* ialloc.c */
|
||||
extern struct inode * ext3_new_inode (handle_t *, struct inode *, int);
|
||||
extern void ext3_free_inode (handle_t *, struct inode *);
|
||||
extern struct inode * ext3_orphan_get (struct super_block *, unsigned long);
|
||||
extern unsigned long ext3_count_free_inodes (struct super_block *);
|
||||
extern unsigned long ext3_count_dirs (struct super_block *);
|
||||
extern void ext3_check_inodes_bitmap (struct super_block *);
|
||||
extern unsigned long ext3_count_free (struct buffer_head *, unsigned);
|
||||
|
||||
|
||||
/* inode.c */
|
||||
int ext3_forget(handle_t *handle, int is_metadata, struct inode *inode,
|
||||
struct buffer_head *bh, ext3_fsblk_t blocknr);
|
||||
struct buffer_head * ext3_getblk (handle_t *, struct inode *, long, int, int *);
|
||||
struct buffer_head * ext3_bread (handle_t *, struct inode *, int, int, int *);
|
||||
int ext3_get_blocks_handle(handle_t *handle, struct inode *inode,
|
||||
sector_t iblock, unsigned long maxblocks, struct buffer_head *bh_result,
|
||||
int create, int extend_disksize);
|
||||
|
||||
extern void ext3_read_inode (struct inode *);
|
||||
extern int ext3_write_inode (struct inode *, int);
|
||||
extern int ext3_setattr (struct dentry *, struct iattr *);
|
||||
extern void ext3_delete_inode (struct inode *);
|
||||
extern int ext3_sync_inode (handle_t *, struct inode *);
|
||||
extern void ext3_discard_reservation (struct inode *);
|
||||
extern void ext3_dirty_inode(struct inode *);
|
||||
extern int ext3_change_inode_journal_flag(struct inode *, int);
|
||||
extern int ext3_get_inode_loc(struct inode *, struct ext3_iloc *);
|
||||
extern void ext3_truncate (struct inode *);
|
||||
extern void ext3_set_inode_flags(struct inode *);
|
||||
extern void ext3_set_aops(struct inode *inode);
|
||||
|
||||
/* ioctl.c */
|
||||
extern int ext3_ioctl (struct inode *, struct file *, unsigned int,
|
||||
unsigned long);
|
||||
extern long ext3_compat_ioctl (struct file *, unsigned int, unsigned long);
|
||||
|
||||
/* namei.c */
|
||||
extern int ext3_orphan_add(handle_t *, struct inode *);
|
||||
extern int ext3_orphan_del(handle_t *, struct inode *);
|
||||
extern int ext3_htree_fill_tree(struct file *dir_file, __u32 start_hash,
|
||||
__u32 start_minor_hash, __u32 *next_hash);
|
||||
|
||||
/* resize.c */
|
||||
extern int ext3_group_add(struct super_block *sb,
|
||||
struct ext3_new_group_data *input);
|
||||
extern int ext3_group_extend(struct super_block *sb,
|
||||
struct ext3_super_block *es,
|
||||
ext3_fsblk_t n_blocks_count);
|
||||
|
||||
/* super.c */
|
||||
extern void ext3_error (struct super_block *, const char *, const char *, ...)
|
||||
__attribute__ ((format (printf, 3, 4)));
|
||||
extern void __ext3_std_error (struct super_block *, const char *, int);
|
||||
extern void ext3_abort (struct super_block *, const char *, const char *, ...)
|
||||
__attribute__ ((format (printf, 3, 4)));
|
||||
extern void ext3_warning (struct super_block *, const char *, const char *, ...)
|
||||
__attribute__ ((format (printf, 3, 4)));
|
||||
extern void ext3_update_dynamic_rev (struct super_block *sb);
|
||||
|
||||
#define ext3_std_error(sb, errno) \
|
||||
do { \
|
||||
if ((errno)) \
|
||||
__ext3_std_error((sb), __FUNCTION__, (errno)); \
|
||||
} while (0)
|
||||
|
||||
/*
|
||||
* Inodes and files operations
|
||||
*/
|
||||
|
||||
/* dir.c */
|
||||
extern const struct file_operations ext3_dir_operations;
|
||||
|
||||
/* file.c */
|
||||
extern struct inode_operations ext3_file_inode_operations;
|
||||
extern const struct file_operations ext3_file_operations;
|
||||
|
||||
/* namei.c */
|
||||
extern struct inode_operations ext3_dir_inode_operations;
|
||||
extern struct inode_operations ext3_special_inode_operations;
|
||||
|
||||
/* symlink.c */
|
||||
extern struct inode_operations ext3_symlink_inode_operations;
|
||||
extern struct inode_operations ext3_fast_symlink_inode_operations;
|
||||
|
||||
|
||||
#endif /* __KERNEL__ */
|
||||
|
||||
#endif /* _LINUX_EXT3_FS_H */
|
||||
147
include/linux/ext4_fs_i.h
Normal file
147
include/linux/ext4_fs_i.h
Normal file
@ -0,0 +1,147 @@
|
||||
/*
|
||||
* linux/include/linux/ext3_fs_i.h
|
||||
*
|
||||
* Copyright (C) 1992, 1993, 1994, 1995
|
||||
* Remy Card (card@masi.ibp.fr)
|
||||
* Laboratoire MASI - Institut Blaise Pascal
|
||||
* Universite Pierre et Marie Curie (Paris VI)
|
||||
*
|
||||
* from
|
||||
*
|
||||
* linux/include/linux/minix_fs_i.h
|
||||
*
|
||||
* Copyright (C) 1991, 1992 Linus Torvalds
|
||||
*/
|
||||
|
||||
#ifndef _LINUX_EXT3_FS_I
|
||||
#define _LINUX_EXT3_FS_I
|
||||
|
||||
#include <linux/rwsem.h>
|
||||
#include <linux/rbtree.h>
|
||||
#include <linux/seqlock.h>
|
||||
#include <linux/mutex.h>
|
||||
|
||||
/* data type for block offset of block group */
|
||||
typedef int ext3_grpblk_t;
|
||||
|
||||
/* data type for filesystem-wide blocks number */
|
||||
typedef unsigned long ext3_fsblk_t;
|
||||
|
||||
#define E3FSBLK "%lu"
|
||||
|
||||
struct ext3_reserve_window {
|
||||
ext3_fsblk_t _rsv_start; /* First byte reserved */
|
||||
ext3_fsblk_t _rsv_end; /* Last byte reserved or 0 */
|
||||
};
|
||||
|
||||
struct ext3_reserve_window_node {
|
||||
struct rb_node rsv_node;
|
||||
__u32 rsv_goal_size;
|
||||
__u32 rsv_alloc_hit;
|
||||
struct ext3_reserve_window rsv_window;
|
||||
};
|
||||
|
||||
struct ext3_block_alloc_info {
|
||||
/* information about reservation window */
|
||||
struct ext3_reserve_window_node rsv_window_node;
|
||||
/*
|
||||
* was i_next_alloc_block in ext3_inode_info
|
||||
* is the logical (file-relative) number of the
|
||||
* most-recently-allocated block in this file.
|
||||
* We use this for detecting linearly ascending allocation requests.
|
||||
*/
|
||||
__u32 last_alloc_logical_block;
|
||||
/*
|
||||
* Was i_next_alloc_goal in ext3_inode_info
|
||||
* is the *physical* companion to i_next_alloc_block.
|
||||
* it the the physical block number of the block which was most-recentl
|
||||
* allocated to this file. This give us the goal (target) for the next
|
||||
* allocation when we detect linearly ascending requests.
|
||||
*/
|
||||
ext3_fsblk_t last_alloc_physical_block;
|
||||
};
|
||||
|
||||
#define rsv_start rsv_window._rsv_start
|
||||
#define rsv_end rsv_window._rsv_end
|
||||
|
||||
/*
|
||||
* third extended file system inode data in memory
|
||||
*/
|
||||
struct ext3_inode_info {
|
||||
__le32 i_data[15]; /* unconverted */
|
||||
__u32 i_flags;
|
||||
#ifdef EXT3_FRAGMENTS
|
||||
__u32 i_faddr;
|
||||
__u8 i_frag_no;
|
||||
__u8 i_frag_size;
|
||||
#endif
|
||||
ext3_fsblk_t i_file_acl;
|
||||
__u32 i_dir_acl;
|
||||
__u32 i_dtime;
|
||||
|
||||
/*
|
||||
* i_block_group is the number of the block group which contains
|
||||
* this file's inode. Constant across the lifetime of the inode,
|
||||
* it is ued for making block allocation decisions - we try to
|
||||
* place a file's data blocks near its inode block, and new inodes
|
||||
* near to their parent directory's inode.
|
||||
*/
|
||||
__u32 i_block_group;
|
||||
__u32 i_state; /* Dynamic state flags for ext3 */
|
||||
|
||||
/* block reservation info */
|
||||
struct ext3_block_alloc_info *i_block_alloc_info;
|
||||
|
||||
__u32 i_dir_start_lookup;
|
||||
#ifdef CONFIG_EXT3_FS_XATTR
|
||||
/*
|
||||
* Extended attributes can be read independently of the main file
|
||||
* data. Taking i_mutex even when reading would cause contention
|
||||
* between readers of EAs and writers of regular file data, so
|
||||
* instead we synchronize on xattr_sem when reading or changing
|
||||
* EAs.
|
||||
*/
|
||||
struct rw_semaphore xattr_sem;
|
||||
#endif
|
||||
#ifdef CONFIG_EXT3_FS_POSIX_ACL
|
||||
struct posix_acl *i_acl;
|
||||
struct posix_acl *i_default_acl;
|
||||
#endif
|
||||
|
||||
struct list_head i_orphan; /* unlinked but open inodes */
|
||||
|
||||
/*
|
||||
* i_disksize keeps track of what the inode size is ON DISK, not
|
||||
* in memory. During truncate, i_size is set to the new size by
|
||||
* the VFS prior to calling ext3_truncate(), but the filesystem won't
|
||||
* set i_disksize to 0 until the truncate is actually under way.
|
||||
*
|
||||
* The intent is that i_disksize always represents the blocks which
|
||||
* are used by this file. This allows recovery to restart truncate
|
||||
* on orphans if we crash during truncate. We actually write i_disksize
|
||||
* into the on-disk inode when writing inodes out, instead of i_size.
|
||||
*
|
||||
* The only time when i_disksize and i_size may be different is when
|
||||
* a truncate is in progress. The only things which change i_disksize
|
||||
* are ext3_get_block (growth) and ext3_truncate (shrinkth).
|
||||
*/
|
||||
loff_t i_disksize;
|
||||
|
||||
/* on-disk additional length */
|
||||
__u16 i_extra_isize;
|
||||
|
||||
/*
|
||||
* truncate_mutex is for serialising ext3_truncate() against
|
||||
* ext3_getblock(). In the 2.4 ext2 design, great chunks of inode's
|
||||
* data tree are chopped off during truncate. We can't do that in
|
||||
* ext3 because whenever we perform intermediate commits during
|
||||
* truncate, the inode and all the metadata blocks *must* be in a
|
||||
* consistent state which allows truncation of the orphans to restart
|
||||
* during recovery. Hence we must fix the get_block-vs-truncate race
|
||||
* by other means, so we have truncate_mutex.
|
||||
*/
|
||||
struct mutex truncate_mutex;
|
||||
struct inode vfs_inode;
|
||||
};
|
||||
|
||||
#endif /* _LINUX_EXT3_FS_I */
|
||||
83
include/linux/ext4_fs_sb.h
Normal file
83
include/linux/ext4_fs_sb.h
Normal file
@ -0,0 +1,83 @@
|
||||
/*
|
||||
* linux/include/linux/ext3_fs_sb.h
|
||||
*
|
||||
* Copyright (C) 1992, 1993, 1994, 1995
|
||||
* Remy Card (card@masi.ibp.fr)
|
||||
* Laboratoire MASI - Institut Blaise Pascal
|
||||
* Universite Pierre et Marie Curie (Paris VI)
|
||||
*
|
||||
* from
|
||||
*
|
||||
* linux/include/linux/minix_fs_sb.h
|
||||
*
|
||||
* Copyright (C) 1991, 1992 Linus Torvalds
|
||||
*/
|
||||
|
||||
#ifndef _LINUX_EXT3_FS_SB
|
||||
#define _LINUX_EXT3_FS_SB
|
||||
|
||||
#ifdef __KERNEL__
|
||||
#include <linux/timer.h>
|
||||
#include <linux/wait.h>
|
||||
#include <linux/blockgroup_lock.h>
|
||||
#include <linux/percpu_counter.h>
|
||||
#endif
|
||||
#include <linux/rbtree.h>
|
||||
|
||||
/*
|
||||
* third extended-fs super-block data in memory
|
||||
*/
|
||||
struct ext3_sb_info {
|
||||
unsigned long s_frag_size; /* Size of a fragment in bytes */
|
||||
unsigned long s_frags_per_block;/* Number of fragments per block */
|
||||
unsigned long s_inodes_per_block;/* Number of inodes per block */
|
||||
unsigned long s_frags_per_group;/* Number of fragments in a group */
|
||||
unsigned long s_blocks_per_group;/* Number of blocks in a group */
|
||||
unsigned long s_inodes_per_group;/* Number of inodes in a group */
|
||||
unsigned long s_itb_per_group; /* Number of inode table blocks per group */
|
||||
unsigned long s_gdb_count; /* Number of group descriptor blocks */
|
||||
unsigned long s_desc_per_block; /* Number of group descriptors per block */
|
||||
unsigned long s_groups_count; /* Number of groups in the fs */
|
||||
struct buffer_head * s_sbh; /* Buffer containing the super block */
|
||||
struct ext3_super_block * s_es; /* Pointer to the super block in the buffer */
|
||||
struct buffer_head ** s_group_desc;
|
||||
unsigned long s_mount_opt;
|
||||
uid_t s_resuid;
|
||||
gid_t s_resgid;
|
||||
unsigned short s_mount_state;
|
||||
unsigned short s_pad;
|
||||
int s_addr_per_block_bits;
|
||||
int s_desc_per_block_bits;
|
||||
int s_inode_size;
|
||||
int s_first_ino;
|
||||
spinlock_t s_next_gen_lock;
|
||||
u32 s_next_generation;
|
||||
u32 s_hash_seed[4];
|
||||
int s_def_hash_version;
|
||||
struct percpu_counter s_freeblocks_counter;
|
||||
struct percpu_counter s_freeinodes_counter;
|
||||
struct percpu_counter s_dirs_counter;
|
||||
struct blockgroup_lock s_blockgroup_lock;
|
||||
|
||||
/* root of the per fs reservation window tree */
|
||||
spinlock_t s_rsv_window_lock;
|
||||
struct rb_root s_rsv_window_root;
|
||||
struct ext3_reserve_window_node s_rsv_window_head;
|
||||
|
||||
/* Journaling */
|
||||
struct inode * s_journal_inode;
|
||||
struct journal_s * s_journal;
|
||||
struct list_head s_orphan;
|
||||
unsigned long s_commit_interval;
|
||||
struct block_device *journal_bdev;
|
||||
#ifdef CONFIG_JBD_DEBUG
|
||||
struct timer_list turn_ro_timer; /* For turning read-only (crash simulation) */
|
||||
wait_queue_head_t ro_wait_queue; /* For people waiting for the fs to go read-only */
|
||||
#endif
|
||||
#ifdef CONFIG_QUOTA
|
||||
char *s_qf_names[MAXQUOTAS]; /* Names of quota files with journalled quota */
|
||||
int s_jquota_fmt; /* Format of quota to use */
|
||||
#endif
|
||||
};
|
||||
|
||||
#endif /* _LINUX_EXT3_FS_SB */
|
||||
268
include/linux/ext4_jbd.h
Normal file
268
include/linux/ext4_jbd.h
Normal file
@ -0,0 +1,268 @@
|
||||
/*
|
||||
* linux/include/linux/ext3_jbd.h
|
||||
*
|
||||
* Written by Stephen C. Tweedie <sct@redhat.com>, 1999
|
||||
*
|
||||
* Copyright 1998--1999 Red Hat corp --- All Rights Reserved
|
||||
*
|
||||
* This file is part of the Linux kernel and is made available under
|
||||
* the terms of the GNU General Public License, version 2, or at your
|
||||
* option, any later version, incorporated herein by reference.
|
||||
*
|
||||
* Ext3-specific journaling extensions.
|
||||
*/
|
||||
|
||||
#ifndef _LINUX_EXT3_JBD_H
|
||||
#define _LINUX_EXT3_JBD_H
|
||||
|
||||
#include <linux/fs.h>
|
||||
#include <linux/jbd.h>
|
||||
#include <linux/ext3_fs.h>
|
||||
|
||||
#define EXT3_JOURNAL(inode) (EXT3_SB((inode)->i_sb)->s_journal)
|
||||
|
||||
/* Define the number of blocks we need to account to a transaction to
|
||||
* modify one block of data.
|
||||
*
|
||||
* We may have to touch one inode, one bitmap buffer, up to three
|
||||
* indirection blocks, the group and superblock summaries, and the data
|
||||
* block to complete the transaction. */
|
||||
|
||||
#define EXT3_SINGLEDATA_TRANS_BLOCKS 8U
|
||||
|
||||
/* Extended attribute operations touch at most two data buffers,
|
||||
* two bitmap buffers, and two group summaries, in addition to the inode
|
||||
* and the superblock, which are already accounted for. */
|
||||
|
||||
#define EXT3_XATTR_TRANS_BLOCKS 6U
|
||||
|
||||
/* Define the minimum size for a transaction which modifies data. This
|
||||
* needs to take into account the fact that we may end up modifying two
|
||||
* quota files too (one for the group, one for the user quota). The
|
||||
* superblock only gets updated once, of course, so don't bother
|
||||
* counting that again for the quota updates. */
|
||||
|
||||
#define EXT3_DATA_TRANS_BLOCKS(sb) (EXT3_SINGLEDATA_TRANS_BLOCKS + \
|
||||
EXT3_XATTR_TRANS_BLOCKS - 2 + \
|
||||
2*EXT3_QUOTA_TRANS_BLOCKS(sb))
|
||||
|
||||
/* Delete operations potentially hit one directory's namespace plus an
|
||||
* entire inode, plus arbitrary amounts of bitmap/indirection data. Be
|
||||
* generous. We can grow the delete transaction later if necessary. */
|
||||
|
||||
#define EXT3_DELETE_TRANS_BLOCKS(sb) (2 * EXT3_DATA_TRANS_BLOCKS(sb) + 64)
|
||||
|
||||
/* Define an arbitrary limit for the amount of data we will anticipate
|
||||
* writing to any given transaction. For unbounded transactions such as
|
||||
* write(2) and truncate(2) we can write more than this, but we always
|
||||
* start off at the maximum transaction size and grow the transaction
|
||||
* optimistically as we go. */
|
||||
|
||||
#define EXT3_MAX_TRANS_DATA 64U
|
||||
|
||||
/* We break up a large truncate or write transaction once the handle's
|
||||
* buffer credits gets this low, we need either to extend the
|
||||
* transaction or to start a new one. Reserve enough space here for
|
||||
* inode, bitmap, superblock, group and indirection updates for at least
|
||||
* one block, plus two quota updates. Quota allocations are not
|
||||
* needed. */
|
||||
|
||||
#define EXT3_RESERVE_TRANS_BLOCKS 12U
|
||||
|
||||
#define EXT3_INDEX_EXTRA_TRANS_BLOCKS 8
|
||||
|
||||
#ifdef CONFIG_QUOTA
|
||||
/* Amount of blocks needed for quota update - we know that the structure was
|
||||
* allocated so we need to update only inode+data */
|
||||
#define EXT3_QUOTA_TRANS_BLOCKS(sb) (test_opt(sb, QUOTA) ? 2 : 0)
|
||||
/* Amount of blocks needed for quota insert/delete - we do some block writes
|
||||
* but inode, sb and group updates are done only once */
|
||||
#define EXT3_QUOTA_INIT_BLOCKS(sb) (test_opt(sb, QUOTA) ? (DQUOT_INIT_ALLOC*\
|
||||
(EXT3_SINGLEDATA_TRANS_BLOCKS-3)+3+DQUOT_INIT_REWRITE) : 0)
|
||||
#define EXT3_QUOTA_DEL_BLOCKS(sb) (test_opt(sb, QUOTA) ? (DQUOT_DEL_ALLOC*\
|
||||
(EXT3_SINGLEDATA_TRANS_BLOCKS-3)+3+DQUOT_DEL_REWRITE) : 0)
|
||||
#else
|
||||
#define EXT3_QUOTA_TRANS_BLOCKS(sb) 0
|
||||
#define EXT3_QUOTA_INIT_BLOCKS(sb) 0
|
||||
#define EXT3_QUOTA_DEL_BLOCKS(sb) 0
|
||||
#endif
|
||||
|
||||
int
|
||||
ext3_mark_iloc_dirty(handle_t *handle,
|
||||
struct inode *inode,
|
||||
struct ext3_iloc *iloc);
|
||||
|
||||
/*
|
||||
* On success, We end up with an outstanding reference count against
|
||||
* iloc->bh. This _must_ be cleaned up later.
|
||||
*/
|
||||
|
||||
int ext3_reserve_inode_write(handle_t *handle, struct inode *inode,
|
||||
struct ext3_iloc *iloc);
|
||||
|
||||
int ext3_mark_inode_dirty(handle_t *handle, struct inode *inode);
|
||||
|
||||
/*
|
||||
* Wrapper functions with which ext3 calls into JBD. The intent here is
|
||||
* to allow these to be turned into appropriate stubs so ext3 can control
|
||||
* ext2 filesystems, so ext2+ext3 systems only nee one fs. This work hasn't
|
||||
* been done yet.
|
||||
*/
|
||||
|
||||
void ext3_journal_abort_handle(const char *caller, const char *err_fn,
|
||||
struct buffer_head *bh, handle_t *handle, int err);
|
||||
|
||||
static inline int
|
||||
__ext3_journal_get_undo_access(const char *where, handle_t *handle,
|
||||
struct buffer_head *bh)
|
||||
{
|
||||
int err = journal_get_undo_access(handle, bh);
|
||||
if (err)
|
||||
ext3_journal_abort_handle(where, __FUNCTION__, bh, handle,err);
|
||||
return err;
|
||||
}
|
||||
|
||||
static inline int
|
||||
__ext3_journal_get_write_access(const char *where, handle_t *handle,
|
||||
struct buffer_head *bh)
|
||||
{
|
||||
int err = journal_get_write_access(handle, bh);
|
||||
if (err)
|
||||
ext3_journal_abort_handle(where, __FUNCTION__, bh, handle,err);
|
||||
return err;
|
||||
}
|
||||
|
||||
static inline void
|
||||
ext3_journal_release_buffer(handle_t *handle, struct buffer_head *bh)
|
||||
{
|
||||
journal_release_buffer(handle, bh);
|
||||
}
|
||||
|
||||
static inline int
|
||||
__ext3_journal_forget(const char *where, handle_t *handle, struct buffer_head *bh)
|
||||
{
|
||||
int err = journal_forget(handle, bh);
|
||||
if (err)
|
||||
ext3_journal_abort_handle(where, __FUNCTION__, bh, handle,err);
|
||||
return err;
|
||||
}
|
||||
|
||||
static inline int
|
||||
__ext3_journal_revoke(const char *where, handle_t *handle,
|
||||
unsigned long blocknr, struct buffer_head *bh)
|
||||
{
|
||||
int err = journal_revoke(handle, blocknr, bh);
|
||||
if (err)
|
||||
ext3_journal_abort_handle(where, __FUNCTION__, bh, handle,err);
|
||||
return err;
|
||||
}
|
||||
|
||||
static inline int
|
||||
__ext3_journal_get_create_access(const char *where,
|
||||
handle_t *handle, struct buffer_head *bh)
|
||||
{
|
||||
int err = journal_get_create_access(handle, bh);
|
||||
if (err)
|
||||
ext3_journal_abort_handle(where, __FUNCTION__, bh, handle,err);
|
||||
return err;
|
||||
}
|
||||
|
||||
static inline int
|
||||
__ext3_journal_dirty_metadata(const char *where,
|
||||
handle_t *handle, struct buffer_head *bh)
|
||||
{
|
||||
int err = journal_dirty_metadata(handle, bh);
|
||||
if (err)
|
||||
ext3_journal_abort_handle(where, __FUNCTION__, bh, handle,err);
|
||||
return err;
|
||||
}
|
||||
|
||||
|
||||
#define ext3_journal_get_undo_access(handle, bh) \
|
||||
__ext3_journal_get_undo_access(__FUNCTION__, (handle), (bh))
|
||||
#define ext3_journal_get_write_access(handle, bh) \
|
||||
__ext3_journal_get_write_access(__FUNCTION__, (handle), (bh))
|
||||
#define ext3_journal_revoke(handle, blocknr, bh) \
|
||||
__ext3_journal_revoke(__FUNCTION__, (handle), (blocknr), (bh))
|
||||
#define ext3_journal_get_create_access(handle, bh) \
|
||||
__ext3_journal_get_create_access(__FUNCTION__, (handle), (bh))
|
||||
#define ext3_journal_dirty_metadata(handle, bh) \
|
||||
__ext3_journal_dirty_metadata(__FUNCTION__, (handle), (bh))
|
||||
#define ext3_journal_forget(handle, bh) \
|
||||
__ext3_journal_forget(__FUNCTION__, (handle), (bh))
|
||||
|
||||
int ext3_journal_dirty_data(handle_t *handle, struct buffer_head *bh);
|
||||
|
||||
handle_t *ext3_journal_start_sb(struct super_block *sb, int nblocks);
|
||||
int __ext3_journal_stop(const char *where, handle_t *handle);
|
||||
|
||||
static inline handle_t *ext3_journal_start(struct inode *inode, int nblocks)
|
||||
{
|
||||
return ext3_journal_start_sb(inode->i_sb, nblocks);
|
||||
}
|
||||
|
||||
#define ext3_journal_stop(handle) \
|
||||
__ext3_journal_stop(__FUNCTION__, (handle))
|
||||
|
||||
static inline handle_t *ext3_journal_current_handle(void)
|
||||
{
|
||||
return journal_current_handle();
|
||||
}
|
||||
|
||||
static inline int ext3_journal_extend(handle_t *handle, int nblocks)
|
||||
{
|
||||
return journal_extend(handle, nblocks);
|
||||
}
|
||||
|
||||
static inline int ext3_journal_restart(handle_t *handle, int nblocks)
|
||||
{
|
||||
return journal_restart(handle, nblocks);
|
||||
}
|
||||
|
||||
static inline int ext3_journal_blocks_per_page(struct inode *inode)
|
||||
{
|
||||
return journal_blocks_per_page(inode);
|
||||
}
|
||||
|
||||
static inline int ext3_journal_force_commit(journal_t *journal)
|
||||
{
|
||||
return journal_force_commit(journal);
|
||||
}
|
||||
|
||||
/* super.c */
|
||||
int ext3_force_commit(struct super_block *sb);
|
||||
|
||||
static inline int ext3_should_journal_data(struct inode *inode)
|
||||
{
|
||||
if (!S_ISREG(inode->i_mode))
|
||||
return 1;
|
||||
if (test_opt(inode->i_sb, DATA_FLAGS) == EXT3_MOUNT_JOURNAL_DATA)
|
||||
return 1;
|
||||
if (EXT3_I(inode)->i_flags & EXT3_JOURNAL_DATA_FL)
|
||||
return 1;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline int ext3_should_order_data(struct inode *inode)
|
||||
{
|
||||
if (!S_ISREG(inode->i_mode))
|
||||
return 0;
|
||||
if (EXT3_I(inode)->i_flags & EXT3_JOURNAL_DATA_FL)
|
||||
return 0;
|
||||
if (test_opt(inode->i_sb, DATA_FLAGS) == EXT3_MOUNT_ORDERED_DATA)
|
||||
return 1;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline int ext3_should_writeback_data(struct inode *inode)
|
||||
{
|
||||
if (!S_ISREG(inode->i_mode))
|
||||
return 0;
|
||||
if (EXT3_I(inode)->i_flags & EXT3_JOURNAL_DATA_FL)
|
||||
return 0;
|
||||
if (test_opt(inode->i_sb, DATA_FLAGS) == EXT3_MOUNT_WRITEBACK_DATA)
|
||||
return 1;
|
||||
return 0;
|
||||
}
|
||||
|
||||
#endif /* _LINUX_EXT3_JBD_H */
|
||||
Loading…
Reference in New Issue
Block a user