diff options
Diffstat (limited to 'ANDROID_3.4.5/fs/gfs2/dir.h')
-rw-r--r-- | ANDROID_3.4.5/fs/gfs2/dir.h | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/ANDROID_3.4.5/fs/gfs2/dir.h b/ANDROID_3.4.5/fs/gfs2/dir.h new file mode 100644 index 00000000..98c960be --- /dev/null +++ b/ANDROID_3.4.5/fs/gfs2/dir.h @@ -0,0 +1,69 @@ +/* + * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. + * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. + * + * This copyrighted material is made available to anyone wishing to use, + * modify, copy, or redistribute it subject to the terms and conditions + * of the GNU General Public License version 2. + */ + +#ifndef __DIR_DOT_H__ +#define __DIR_DOT_H__ + +#include <linux/dcache.h> +#include <linux/crc32.h> + +struct inode; +struct gfs2_inode; +struct gfs2_inum; + +extern struct inode *gfs2_dir_search(struct inode *dir, + const struct qstr *filename); +extern int gfs2_dir_check(struct inode *dir, const struct qstr *filename, + const struct gfs2_inode *ip); +extern int gfs2_dir_add(struct inode *inode, const struct qstr *filename, + const struct gfs2_inode *ip); +extern int gfs2_dir_del(struct gfs2_inode *dip, const struct dentry *dentry); +extern int gfs2_dir_read(struct inode *inode, u64 *offset, void *opaque, + filldir_t filldir, struct file_ra_state *f_ra); +extern int gfs2_dir_mvino(struct gfs2_inode *dip, const struct qstr *filename, + const struct gfs2_inode *nip, unsigned int new_type); + +extern int gfs2_dir_exhash_dealloc(struct gfs2_inode *dip); + +extern int gfs2_diradd_alloc_required(struct inode *dir, + const struct qstr *filename); +extern int gfs2_dir_get_new_buffer(struct gfs2_inode *ip, u64 block, + struct buffer_head **bhp); +extern void gfs2_dir_hash_inval(struct gfs2_inode *ip); + +static inline u32 gfs2_disk_hash(const char *data, int len) +{ + return crc32_le((u32)~0, data, len) ^ (u32)~0; +} + + +static inline void gfs2_str2qstr(struct qstr *name, const char *fname) +{ + name->name = fname; + name->len = strlen(fname); + name->hash = gfs2_disk_hash(name->name, name->len); +} + +/* N.B. This probably ought to take inum & type as args as well */ +static inline void gfs2_qstr2dirent(const struct qstr *name, u16 reclen, struct gfs2_dirent *dent) +{ + dent->de_inum.no_addr = cpu_to_be64(0); + dent->de_inum.no_formal_ino = cpu_to_be64(0); + dent->de_hash = cpu_to_be32(name->hash); + dent->de_rec_len = cpu_to_be16(reclen); + dent->de_name_len = cpu_to_be16(name->len); + dent->de_type = cpu_to_be16(0); + memset(dent->__pad, 0, sizeof(dent->__pad)); + memcpy(dent + 1, name->name, name->len); +} + +extern struct qstr gfs2_qdot; +extern struct qstr gfs2_qdotdot; + +#endif /* __DIR_DOT_H__ */ |