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907f4554e2
Currently various places in the VFS call vfs_dq_init directly. This means we tie the quota code into the VFS. Get rid of that and make the filesystem responsible for the initialization. For most metadata operations this is a straight forward move into the methods, but for truncate and open it's a bit more complicated. For truncate we currently only call vfs_dq_init for the sys_truncate case because open already takes care of it for ftruncate and open(O_TRUNC) - the new code causes an additional vfs_dq_init for those which is harmless. For open the initialization is moved from do_filp_open into the open method, which means it happens slightly earlier now, and only for regular files. The latter is fine because we don't need to initialize it for operations on special files, and we already do it as part of the namespace operations for directories. Add a dquot_file_open helper that filesystems that support generic quotas can use to fill in ->open. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz>
147 lines
3.9 KiB
C
147 lines
3.9 KiB
C
/*
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* Copyright (C) International Business Machines Corp., 2000-2002
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* Portions Copyright (C) Christoph Hellwig, 2001-2002
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/fs.h>
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#include <linux/quotaops.h>
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#include "jfs_incore.h"
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#include "jfs_inode.h"
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#include "jfs_dmap.h"
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#include "jfs_txnmgr.h"
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#include "jfs_xattr.h"
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#include "jfs_acl.h"
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#include "jfs_debug.h"
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int jfs_fsync(struct file *file, struct dentry *dentry, int datasync)
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{
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struct inode *inode = dentry->d_inode;
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int rc = 0;
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if (!(inode->i_state & I_DIRTY) ||
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(datasync && !(inode->i_state & I_DIRTY_DATASYNC))) {
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/* Make sure committed changes hit the disk */
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jfs_flush_journal(JFS_SBI(inode->i_sb)->log, 1);
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return rc;
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}
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rc |= jfs_commit_inode(inode, 1);
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return rc ? -EIO : 0;
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}
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static int jfs_open(struct inode *inode, struct file *file)
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{
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int rc;
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if ((rc = dquot_file_open(inode, file)))
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return rc;
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/*
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* We attempt to allow only one "active" file open per aggregate
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* group. Otherwise, appending to files in parallel can cause
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* fragmentation within the files.
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*
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* If the file is empty, it was probably just created and going
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* to be written to. If it has a size, we'll hold off until the
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* file is actually grown.
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*/
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if (S_ISREG(inode->i_mode) && file->f_mode & FMODE_WRITE &&
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(inode->i_size == 0)) {
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struct jfs_inode_info *ji = JFS_IP(inode);
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spin_lock_irq(&ji->ag_lock);
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if (ji->active_ag == -1) {
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ji->active_ag = ji->agno;
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atomic_inc(
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&JFS_SBI(inode->i_sb)->bmap->db_active[ji->agno]);
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}
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spin_unlock_irq(&ji->ag_lock);
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}
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return 0;
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}
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static int jfs_release(struct inode *inode, struct file *file)
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{
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struct jfs_inode_info *ji = JFS_IP(inode);
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spin_lock_irq(&ji->ag_lock);
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if (ji->active_ag != -1) {
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struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap;
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atomic_dec(&bmap->db_active[ji->active_ag]);
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ji->active_ag = -1;
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}
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spin_unlock_irq(&ji->ag_lock);
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return 0;
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}
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int jfs_setattr(struct dentry *dentry, struct iattr *iattr)
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{
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struct inode *inode = dentry->d_inode;
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int rc;
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rc = inode_change_ok(inode, iattr);
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if (rc)
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return rc;
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if (iattr->ia_valid & ATTR_SIZE)
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vfs_dq_init(inode);
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if ((iattr->ia_valid & ATTR_UID && iattr->ia_uid != inode->i_uid) ||
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(iattr->ia_valid & ATTR_GID && iattr->ia_gid != inode->i_gid)) {
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rc = dquot_transfer(inode, iattr);
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if (rc)
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return rc;
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}
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rc = inode_setattr(inode, iattr);
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if (!rc && (iattr->ia_valid & ATTR_MODE))
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rc = jfs_acl_chmod(inode);
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return rc;
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}
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const struct inode_operations jfs_file_inode_operations = {
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.truncate = jfs_truncate,
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.setxattr = jfs_setxattr,
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.getxattr = jfs_getxattr,
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.listxattr = jfs_listxattr,
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.removexattr = jfs_removexattr,
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.setattr = jfs_setattr,
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#ifdef CONFIG_JFS_POSIX_ACL
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.check_acl = jfs_check_acl,
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#endif
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};
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const struct file_operations jfs_file_operations = {
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.open = jfs_open,
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.llseek = generic_file_llseek,
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.write = do_sync_write,
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.read = do_sync_read,
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.aio_read = generic_file_aio_read,
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.aio_write = generic_file_aio_write,
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.mmap = generic_file_mmap,
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.splice_read = generic_file_splice_read,
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.splice_write = generic_file_splice_write,
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.fsync = jfs_fsync,
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.release = jfs_release,
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.unlocked_ioctl = jfs_ioctl,
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#ifdef CONFIG_COMPAT
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.compat_ioctl = jfs_compat_ioctl,
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#endif
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};
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