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shmem: new export ops

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I'm not sure what people were thinking when adding support to export tmpfs,
but here's the conversion anyway:

Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Neil Brown <neilb@suse.de>
Cc: "J. Bruce Fields" <bfields@fieldses.org>
Cc: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Christoph Hellwig 2007-10-21 16:42:13 -07:00 committed by Linus Torvalds
parent 905251a02e
commit 480b116c98
1 changed files with 13 additions and 22 deletions
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35
mm/shmem.c
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@ -2020,33 +2020,25 @@ static int shmem_match(struct inode *ino, void *vfh)
return ino->i_ino == inum && fh[0] == ino->i_generation;
}
static struct dentry *shmem_get_dentry(struct super_block *sb, void *vfh)
static struct dentry *shmem_fh_to_dentry(struct super_block *sb,
struct fid *fid, int fh_len, int fh_type)
{
struct dentry *de = NULL;
struct inode *inode;
__u32 *fh = vfh;
__u64 inum = fh[2];
inum = (inum << 32) | fh[1];
struct dentry *dentry = NULL;
u64 inum = fid->raw[2];
inum = (inum << 32) | fid->raw[1];
inode = ilookup5(sb, (unsigned long)(inum+fh[0]), shmem_match, vfh);
if (fh_len < 3)
return NULL;
inode = ilookup5(sb, (unsigned long)(inum + fid->raw[0]),
shmem_match, fid->raw);
if (inode) {
de = d_find_alias(inode);
dentry = d_find_alias(inode);
iput(inode);
}
return de? de: ERR_PTR(-ESTALE);
}
static struct dentry *shmem_decode_fh(struct super_block *sb, __u32 *fh,
int len, int type,
int (*acceptable)(void *context, struct dentry *de),
void *context)
{
if (len < 3)
return ERR_PTR(-ESTALE);
return sb->s_export_op->find_exported_dentry(sb, fh, NULL, acceptable,
context);
return dentry;
}
static int shmem_encode_fh(struct dentry *dentry, __u32 *fh, int *len,
@ -2081,9 +2073,8 @@ static int shmem_encode_fh(struct dentry *dentry, __u32 *fh, int *len,
static struct export_operations shmem_export_ops = {
.get_parent = shmem_get_parent,
.get_dentry = shmem_get_dentry,
.encode_fh = shmem_encode_fh,
.decode_fh = shmem_decode_fh,
.fh_to_dentry = shmem_fh_to_dentry,
};
static int shmem_parse_options(char *options, int *mode, uid_t *uid,