forked from Minki/linux
629a21e7ec
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
80 lines
2.6 KiB
C
80 lines
2.6 KiB
C
/*
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* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
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* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
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*
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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU General Public License version 2.
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*/
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#ifndef __DIR_DOT_H__
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#define __DIR_DOT_H__
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#include <linux/dcache.h>
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struct inode;
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struct gfs2_inode;
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struct gfs2_inum;
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/**
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* gfs2_filldir_t - Report a directory entry to the caller of gfs2_dir_read()
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* @opaque: opaque data used by the function
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* @name: the name of the directory entry
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* @length: the length of the name
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* @offset: the entry's offset in the directory
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* @inum: the inode number the entry points to
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* @type: the type of inode the entry points to
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*
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* Returns: 0 on success, 1 if buffer full
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*/
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typedef int (*gfs2_filldir_t) (void *opaque,
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const char *name, unsigned int length,
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u64 offset,
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struct gfs2_inum_host *inum, unsigned int type);
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int gfs2_dir_search(struct inode *dir, const struct qstr *filename,
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struct gfs2_inum_host *inum, unsigned int *type);
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int gfs2_dir_add(struct inode *inode, const struct qstr *filename,
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const struct gfs2_inum_host *inum, unsigned int type);
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int gfs2_dir_del(struct gfs2_inode *dip, const struct qstr *filename);
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int gfs2_dir_read(struct inode *inode, u64 * offset, void *opaque,
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gfs2_filldir_t filldir);
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int gfs2_dir_mvino(struct gfs2_inode *dip, const struct qstr *filename,
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struct gfs2_inum_host *new_inum, unsigned int new_type);
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int gfs2_dir_exhash_dealloc(struct gfs2_inode *dip);
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int gfs2_diradd_alloc_required(struct inode *dir,
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const struct qstr *filename);
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int gfs2_dir_get_new_buffer(struct gfs2_inode *ip, u64 block,
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struct buffer_head **bhp);
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static inline u32 gfs2_disk_hash(const char *data, int len)
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{
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return crc32_le((u32)~0, data, len) ^ (u32)~0;
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}
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static inline void gfs2_str2qstr(struct qstr *name, const char *fname)
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{
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name->name = fname;
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name->len = strlen(fname);
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name->hash = gfs2_disk_hash(name->name, name->len);
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}
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/* N.B. This probably ought to take inum & type as args as well */
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static inline void gfs2_qstr2dirent(const struct qstr *name, u16 reclen, struct gfs2_dirent *dent)
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{
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dent->de_inum.no_addr = cpu_to_be64(0);
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dent->de_inum.no_formal_ino = cpu_to_be64(0);
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dent->de_hash = cpu_to_be32(name->hash);
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dent->de_rec_len = cpu_to_be16(reclen);
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dent->de_name_len = cpu_to_be16(name->len);
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dent->de_type = cpu_to_be16(0);
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memset(dent->__pad, 0, sizeof(dent->__pad));
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memcpy(dent + 1, name->name, name->len);
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}
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#endif /* __DIR_DOT_H__ */
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