4 * Copyright (c) 1999 Al Smith
6 * Portions derived from work (c) 1995,1996 Christian Vogelgsang.
9 #include <linux/buffer_head.h>
10 #include <linux/string.h>
11 #include <linux/exportfs.h>
15 static efs_ino_t
efs_find_entry(struct inode
*inode
, const char *name
, int len
)
17 struct buffer_head
*bh
;
21 struct efs_dir
*dirblock
;
22 struct efs_dentry
*dirslot
;
26 if (inode
->i_size
& (EFS_DIRBSIZE
-1))
27 pr_warn("%s(): directory size not a multiple of EFS_DIRBSIZE\n",
30 for(block
= 0; block
< inode
->i_blocks
; block
++) {
32 bh
= sb_bread(inode
->i_sb
, efs_bmap(inode
, block
));
34 pr_err("%s(): failed to read dir block %d\n",
39 dirblock
= (struct efs_dir
*) bh
->b_data
;
41 if (be16_to_cpu(dirblock
->magic
) != EFS_DIRBLK_MAGIC
) {
42 pr_err("%s(): invalid directory block\n", __func__
);
47 for (slot
= 0; slot
< dirblock
->slots
; slot
++) {
48 dirslot
= (struct efs_dentry
*) (((char *) bh
->b_data
) + EFS_SLOTAT(dirblock
, slot
));
50 namelen
= dirslot
->namelen
;
51 nameptr
= dirslot
->name
;
53 if ((namelen
== len
) && (!memcmp(name
, nameptr
, len
))) {
54 inodenum
= be32_to_cpu(dirslot
->inode
);
64 struct dentry
*efs_lookup(struct inode
*dir
, struct dentry
*dentry
, unsigned int flags
)
67 struct inode
*inode
= NULL
;
69 inodenum
= efs_find_entry(dir
, dentry
->d_name
.name
, dentry
->d_name
.len
);
71 inode
= efs_iget(dir
->i_sb
, inodenum
);
73 return d_splice_alias(inode
, dentry
);
76 static struct inode
*efs_nfs_get_inode(struct super_block
*sb
, u64 ino
,
82 return ERR_PTR(-ESTALE
);
83 inode
= efs_iget(sb
, ino
);
85 return ERR_CAST(inode
);
87 if (generation
&& inode
->i_generation
!= generation
) {
89 return ERR_PTR(-ESTALE
);
95 struct dentry
*efs_fh_to_dentry(struct super_block
*sb
, struct fid
*fid
,
96 int fh_len
, int fh_type
)
98 return generic_fh_to_dentry(sb
, fid
, fh_len
, fh_type
,
102 struct dentry
*efs_fh_to_parent(struct super_block
*sb
, struct fid
*fid
,
103 int fh_len
, int fh_type
)
105 return generic_fh_to_parent(sb
, fid
, fh_len
, fh_type
,
109 struct dentry
*efs_get_parent(struct dentry
*child
)
111 struct dentry
*parent
= ERR_PTR(-ENOENT
);
114 ino
= efs_find_entry(d_inode(child
), "..", 2);
116 parent
= d_obtain_alias(efs_iget(child
->d_sb
, ino
));
This page took 0.0324759999999999 seconds and 5 git commands to generate.