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authorAl Viro <viro@zeniv.linux.org.uk>2015-04-15 00:42:49 +0300
committerAl Viro <viro@zeniv.linux.org.uk>2015-05-11 05:18:19 +0300
commit90e4fc8890daecea72ef73ac8047050e3e8d32db (patch)
tree41920d19c3f34c94218ba9910b783047b187cca2 /fs/9p/vfs_inode_dotl.c
parentb46c267e4756a88593c4a08de869e70d3907637f (diff)
downloadlinux-90e4fc8890daecea72ef73ac8047050e3e8d32db.tar.xz
9p: don't bother with __getname() in ->follow_link()
We copy there a kmalloc'ed string and proceed to kfree that string immediately after that. Easier to just feed that string to nd_set_link() and _not_ kfree it until ->put_link() (which becomes kfree_put_link() in that case). Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/9p/vfs_inode_dotl.c')
-rw-r--r--fs/9p/vfs_inode_dotl.c31
1 files changed, 8 insertions, 23 deletions
diff --git a/fs/9p/vfs_inode_dotl.c b/fs/9p/vfs_inode_dotl.c
index 9861c7c951a6..bc2a91f2b910 100644
--- a/fs/9p/vfs_inode_dotl.c
+++ b/fs/9p/vfs_inode_dotl.c
@@ -912,33 +912,18 @@ error:
static void *
v9fs_vfs_follow_link_dotl(struct dentry *dentry, struct nameidata *nd)
{
- int retval;
- struct p9_fid *fid;
- char *link = __getname();
+ struct p9_fid *fid = v9fs_fid_lookup(dentry);
char *target;
+ int retval;
p9_debug(P9_DEBUG_VFS, "%pd\n", dentry);
- if (!link) {
- link = ERR_PTR(-ENOMEM);
- goto ndset;
- }
- fid = v9fs_fid_lookup(dentry);
- if (IS_ERR(fid)) {
- __putname(link);
- link = ERR_CAST(fid);
- goto ndset;
- }
+ if (IS_ERR(fid))
+ return ERR_CAST(fid);
retval = p9_client_readlink(fid, &target);
- if (!retval) {
- strcpy(link, target);
- kfree(target);
- goto ndset;
- }
- __putname(link);
- link = ERR_PTR(retval);
-ndset:
- nd_set_link(nd, link);
+ if (retval)
+ return ERR_PTR(retval);
+ nd_set_link(nd, target);
return NULL;
}
@@ -1006,7 +991,7 @@ const struct inode_operations v9fs_file_inode_operations_dotl = {
const struct inode_operations v9fs_symlink_inode_operations_dotl = {
.readlink = generic_readlink,
.follow_link = v9fs_vfs_follow_link_dotl,
- .put_link = v9fs_vfs_put_link,
+ .put_link = kfree_put_link,
.getattr = v9fs_vfs_getattr_dotl,
.setattr = v9fs_vfs_setattr_dotl,
.setxattr = generic_setxattr,