/* * 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> struct inode; struct gfs2_inode; struct gfs2_inum; /** * gfs2_filldir_t - Report a directory entry to the caller of gfs2_dir_read() * @opaque: opaque data used by the function * @name: the name of the directory entry * @length: the length of the name * @offset: the entry's offset in the directory * @inum: the inode number the entry points to * @type: the type of inode the entry points to * * Returns: 0 on success, 1 if buffer full */ typedef int (*gfs2_filldir_t) (void *opaque, const char *name, unsigned int length, u64 offset, struct gfs2_inum *inum, unsigned int type); int gfs2_dir_search(struct inode *dir, const struct qstr *filename, struct gfs2_inum *inum, unsigned int *type); int gfs2_dir_add(struct inode *inode, const struct qstr *filename, const struct gfs2_inum *inum, unsigned int type); int gfs2_dir_del(struct gfs2_inode *dip, const struct qstr *filename); int gfs2_dir_read(struct inode *inode, u64 * offset, void *opaque, gfs2_filldir_t filldir); int gfs2_dir_mvino(struct gfs2_inode *dip, const struct qstr *filename, struct gfs2_inum *new_inum, unsigned int new_type); int gfs2_dir_exhash_dealloc(struct gfs2_inode *dip); int gfs2_diradd_alloc_required(struct inode *dir, const struct qstr *filename); int gfs2_dir_get_new_buffer(struct gfs2_inode *ip, u64 block, struct buffer_head **bhp); 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); } #endif /* __DIR_DOT_H__ */