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9p: add fid-based variant of v9fs_xattr_set()

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... making v9fs_xattr_set() a wrapper for it.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2013-01-31 12:34:58 -05:00
parent 8add862fad
commit 38baba9ea0
2 changed files with 20 additions and 15 deletions
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33
fs/9p/xattr.c
View File

@ -110,20 +110,27 @@ ssize_t v9fs_xattr_get(struct dentry *dentry, const char *name,
*/
int v9fs_xattr_set(struct dentry *dentry, const char *name,
const void *value, size_t value_len, int flags)
{
struct p9_fid *fid = v9fs_fid_lookup(dentry);
if (IS_ERR(fid))
return PTR_ERR(fid);
return v9fs_fid_xattr_set(fid, name, value, value_len, flags);
}
int v9fs_fid_xattr_set(struct p9_fid *fid, const char *name,
const void *value, size_t value_len, int flags)
{
u64 offset = 0;
int retval, msize, write_count;
struct p9_fid *fid = NULL;
p9_debug(P9_DEBUG_VFS, "name = %s value_len = %zu flags = %d\n",
name, value_len, flags);
fid = v9fs_fid_clone(dentry);
if (IS_ERR(fid)) {
retval = PTR_ERR(fid);
fid = NULL;
goto error;
}
/* Clone it */
fid = p9_client_walk(fid, 0, NULL, 1);
if (IS_ERR(fid))
return PTR_ERR(fid);
/*
* On success fid points to xattr
*/
@ -131,7 +138,8 @@ int v9fs_xattr_set(struct dentry *dentry, const char *name,
if (retval < 0) {
p9_debug(P9_DEBUG_VFS, "p9_client_xattrcreate failed %d\n",
retval);
goto error;
p9_client_clunk(fid);
return retval;
}
msize = fid->clnt->msize;
while (value_len) {
@ -144,17 +152,12 @@ int v9fs_xattr_set(struct dentry *dentry, const char *name,
if (write_count < 0) {
/* error in xattr write */
retval = write_count;
goto error;
break;
}
offset += write_count;
value_len -= write_count;
}
/* Total read xattr bytes */
retval = offset;
error:
if (fid)
retval = p9_client_clunk(fid);
return retval;
return p9_client_clunk(fid);
}
ssize_t v9fs_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size)

2
fs/9p/xattr.h
View File

@ -27,6 +27,8 @@ extern ssize_t v9fs_fid_xattr_get(struct p9_fid *, const char *,
void *, size_t);
extern ssize_t v9fs_xattr_get(struct dentry *, const char *,
void *, size_t);
extern int v9fs_fid_xattr_set(struct p9_fid *, const char *,
const void *, size_t, int);
extern int v9fs_xattr_set(struct dentry *, const char *,
const void *, size_t, int);
extern ssize_t v9fs_listxattr(struct dentry *, char *, size_t);