9p: new helper - v9fs_parent_fid()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

3 files changed, 14 insertions, 16 deletions

diff --git a/fs/9p/fid.h b/fs/9p/fid.h
index 2b6787fcb626..12700df0bb51 100644
--- a/fs/9p/fid.h
+++ b/fs/9p/fid.h
@@ -24,6 +24,10 @@
 #include <linux/list.h>
 
 struct p9_fid *v9fs_fid_lookup(struct dentry *dentry);
+static inline struct p9_fid *v9fs_parent_fid(struct dentry *dentry)
+{
+        return v9fs_fid_lookup(dentry->d_parent);
+}
 struct p9_fid *v9fs_fid_clone(struct dentry *dentry);
 void v9fs_fid_add(struct dentry *dentry, struct p9_fid *fid);
 struct p9_fid *v9fs_writeback_fid(struct dentry *dentry);
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index f4645c515262..cca44862f2cf 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -595,7 +595,7 @@ static int v9fs_remove(struct inode *dir, struct dentry *dentry, int flags)
 
         v9ses = v9fs_inode2v9ses(dir);
         inode = d_inode(dentry);
-        dfid = v9fs_fid_lookup(dentry->d_parent);
+        dfid = v9fs_parent_fid(dentry);
         if (IS_ERR(dfid)) {
                 retval = PTR_ERR(dfid);
                 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", retval);
@@ -653,7 +653,7 @@ v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir,
         ofid = NULL;
         fid = NULL;
         name = (char *) dentry->d_name.name;
-        dfid = v9fs_fid_lookup(dentry->d_parent);
+        dfid = v9fs_parent_fid(dentry);
         if (IS_ERR(dfid)) {
                 err = PTR_ERR(dfid);
                 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
@@ -798,7 +798,7 @@ struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
 
         v9ses = v9fs_inode2v9ses(dir);
         /* We can walk d_parent because we hold the dir->i_mutex */
-        dfid = v9fs_fid_lookup(dentry->d_parent);
+        dfid = v9fs_parent_fid(dentry);
         if (IS_ERR(dfid))
                 return ERR_CAST(dfid);
 
@@ -975,13 +975,13 @@ v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
         if (IS_ERR(oldfid))
                 return PTR_ERR(oldfid);
 
-        olddirfid = v9fs_fid_clone(old_dentry->d_parent);
+        olddirfid = v9fs_parent_fid(old_dentry);
         if (IS_ERR(olddirfid)) {
                 retval = PTR_ERR(olddirfid);
                 goto done;
         }
 
-        newdirfid = v9fs_fid_clone(new_dentry->d_parent);
+        newdirfid = v9fs_parent_fid(new_dentry);
         if (IS_ERR(newdirfid)) {
                 retval = PTR_ERR(newdirfid);
                 goto clunk_olddir;
diff --git a/fs/9p/vfs_inode_dotl.c b/fs/9p/vfs_inode_dotl.c
index a34702c998f5..7432e1615311 100644
--- a/fs/9p/vfs_inode_dotl.c
+++ b/fs/9p/vfs_inode_dotl.c
@@ -273,7 +273,7 @@ v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
         p9_debug(P9_DEBUG_VFS, "name:%s flags:0x%x mode:0x%hx\n",
                  name, flags, omode);
 
-        dfid = v9fs_fid_lookup(dentry->d_parent);
+        dfid = v9fs_parent_fid(dentry);
         if (IS_ERR(dfid)) {
                 err = PTR_ERR(dfid);
                 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
@@ -389,7 +389,6 @@ static int v9fs_vfs_mkdir_dotl(struct inode *dir,
         umode_t mode;
         struct inode *inode;
         struct p9_qid qid;
-        struct dentry *dir_dentry;
         struct posix_acl *dacl = NULL, *pacl = NULL;
 
         p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry);
@@ -400,8 +399,7 @@ static int v9fs_vfs_mkdir_dotl(struct inode *dir,
         if (dir->i_mode & S_ISGID)
                 omode |= S_ISGID;
 
-        dir_dentry = dentry->d_parent;
-        dfid = v9fs_fid_lookup(dir_dentry);
+        dfid = v9fs_parent_fid(dentry);
         if (IS_ERR(dfid)) {
                 err = PTR_ERR(dfid);
                 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
@@ -691,7 +689,7 @@ v9fs_vfs_symlink_dotl(struct inode *dir, struct dentry *dentry,
         p9_debug(P9_DEBUG_VFS, "%lu,%s,%s\n", dir->i_ino, name, symname);
         v9ses = v9fs_inode2v9ses(dir);
 
-        dfid = v9fs_fid_lookup(dentry->d_parent);
+        dfid = v9fs_parent_fid(dentry);
         if (IS_ERR(dfid)) {
                 err = PTR_ERR(dfid);
                 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
@@ -762,7 +760,6 @@ v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir,
                 struct dentry *dentry)
 {
         int err;
-        struct dentry *dir_dentry;
         struct p9_fid *dfid, *oldfid;
         struct v9fs_session_info *v9ses;
 
@@ -770,8 +767,7 @@ v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir,
                  dir->i_ino, old_dentry, dentry);
 
         v9ses = v9fs_inode2v9ses(dir);
-        dir_dentry = dentry->d_parent;
-        dfid = v9fs_fid_lookup(dir_dentry);
+        dfid = v9fs_parent_fid(dentry);
         if (IS_ERR(dfid))
                 return PTR_ERR(dfid);
 
@@ -822,7 +818,6 @@ v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, umode_t omode,
         struct p9_fid *fid = NULL, *dfid = NULL;
         struct inode *inode;
         struct p9_qid qid;
-        struct dentry *dir_dentry;
         struct posix_acl *dacl = NULL, *pacl = NULL;
 
         p9_debug(P9_DEBUG_VFS, " %lu,%pd mode: %hx MAJOR: %u MINOR: %u\n",
@@ -830,8 +825,7 @@ v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, umode_t omode,
                  MAJOR(rdev), MINOR(rdev));
 
         v9ses = v9fs_inode2v9ses(dir);
-        dir_dentry = dentry->d_parent;
-        dfid = v9fs_fid_lookup(dir_dentry);
+        dfid = v9fs_parent_fid(dentry);
         if (IS_ERR(dfid)) {
                 err = PTR_ERR(dfid);
                 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);