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| author | M. Mohan Kumar <mohan@in.ibm.com> | 2011-01-08 07:28:46 +0530 |
|---|---|---|
| committer | Eric Van Hensbergen <ericvh@gmail.com> | 2011-01-11 09:58:08 -0600 |
| commit | 31b6ceac497954c160c61f07e76b891b1cf53c90 (patch) | |
| tree | 4874203ee50416646a95afc8b5ed868d9f30730f | |
| parent | 219fd58be62d01e30224c7af919dea77b7e392a8 (diff) | |
| download | linux-3.10-31b6ceac497954c160c61f07e76b891b1cf53c90.tar.gz linux-3.10-31b6ceac497954c160c61f07e76b891b1cf53c90.tar.bz2 linux-3.10-31b6ceac497954c160c61f07e76b891b1cf53c90.zip | |
fs/9p: TREADLINK bugfix
Remove v9fs_vfs_readlink_dotl function and use generic_readlink. Update
v9fs_vfs_follow_link_dotl function to accommodate this change
Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com>
Reported-by: Dr. David Alan Gilbert <linux@treblig.org>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| -rw-r--r-- | fs/9p/vfs_inode_dotl.c | 58 |
1 files changed, 22 insertions, 36 deletions
diff --git a/fs/9p/vfs_inode_dotl.c b/fs/9p/vfs_inode_dotl.c index b6f3977545f..b7f8dcbabdb 100644 --- a/fs/9p/vfs_inode_dotl.c +++ b/fs/9p/vfs_inode_dotl.c @@ -755,30 +755,6 @@ error: return err; } -static int -v9fs_vfs_readlink_dotl(struct dentry *dentry, char *buffer, int buflen) -{ - int retval; - struct p9_fid *fid; - char *target = NULL; - - P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name); - retval = -EPERM; - fid = v9fs_fid_lookup(dentry); - if (IS_ERR(fid)) - return PTR_ERR(fid); - - retval = p9_client_readlink(fid, &target); - if (retval < 0) - return retval; - - strncpy(buffer, target, buflen); - P9_DPRINTK(P9_DEBUG_VFS, "%s -> %s\n", dentry->d_name.name, buffer); - - retval = strnlen(buffer, buflen); - return retval; -} - /** * v9fs_vfs_follow_link_dotl - follow a symlink path * @dentry: dentry for symlink @@ -789,23 +765,33 @@ v9fs_vfs_readlink_dotl(struct dentry *dentry, char *buffer, int buflen) static void * v9fs_vfs_follow_link_dotl(struct dentry *dentry, struct nameidata *nd) { - int len = 0; + int retval; + struct p9_fid *fid; char *link = __getname(); + char *target; - P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name); + P9_DPRINTK(P9_DEBUG_VFS, "%s\n", dentry->d_name.name); - if (!link) + if (!link) { link = ERR_PTR(-ENOMEM); - else { - len = v9fs_vfs_readlink_dotl(dentry, link, PATH_MAX); - if (len < 0) { - __putname(link); - link = ERR_PTR(len); - } else - link[min(len, PATH_MAX-1)] = 0; + goto ndset; } + fid = v9fs_fid_lookup(dentry); + if (IS_ERR(fid)) { + __putname(link); + link = ERR_PTR(PTR_ERR(fid)); + goto ndset; + } + 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); - return NULL; } @@ -839,7 +825,7 @@ const struct inode_operations v9fs_file_inode_operations_dotl = { }; const struct inode_operations v9fs_symlink_inode_operations_dotl = { - .readlink = v9fs_vfs_readlink_dotl, + .readlink = generic_readlink, .follow_link = v9fs_vfs_follow_link_dotl, .put_link = v9fs_vfs_put_link, .getattr = v9fs_vfs_getattr_dotl, |