CIFS: Implement follow_link for SMB2

[deliverable/linux.git] / fs / cifs / link.c

diff --git a/fs/cifs/link.c b/fs/cifs/link.c
index 562044f700e56bf27997bf7ef7490bddf6bc1c91..7e36ceba0c7a72d797a798de500847d4fa6ac66d 100644 (file)
--- a/fs/cifs/link.c
+++ b/fs/cifs/link.c
@@ -509,6 +509,7 @@ cifs_follow_link(struct dentry *direntry, struct nameidata *nd)
        struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
        struct tcon_link *tlink = NULL;
        struct cifs_tcon *tcon;
+       struct TCP_Server_Info *server;
 
        xid = get_xid();
 
@@ -519,25 +520,7 @@ cifs_follow_link(struct dentry *direntry, struct nameidata *nd)
                goto out;
        }
        tcon = tlink_tcon(tlink);
-
-       /*
-        * For now, we just handle symlinks with unix extensions enabled.
-        * Eventually we should handle NTFS reparse points, and MacOS
-        * symlink support. For instance...
-        *
-        * rc = CIFSSMBQueryReparseLinkInfo(...)
-        *
-        * For now, just return -EACCES when the server doesn't support posix
-        * extensions. Note that we still allow querying symlinks when posix
-        * extensions are manually disabled. We could disable these as well
-        * but there doesn't seem to be any harm in allowing the client to
-        * read them.
-        */
-       if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) &&
-           !cap_unix(tcon->ses)) {
-               rc = -EACCES;
-               goto out;
-       }
+       server = tcon->ses->server;
 
        full_path = build_path_from_dentry(direntry);
        if (!full_path)
@@ -559,6 +542,9 @@ cifs_follow_link(struct dentry *direntry, struct nameidata *nd)
        if ((rc != 0) && cap_unix(tcon->ses))
                rc = CIFSSMBUnixQuerySymLink(xid, tcon, full_path, &target_path,
                                             cifs_sb->local_nls);
+       else if (rc != 0 && server->ops->query_symlink)
+               rc = server->ops->query_symlink(xid, tcon, full_path,
+                                               &target_path, cifs_sb);
 
        kfree(full_path);
 out: