fs/9p: Attach writeback_fid on first open with WR flag

We don't need writeback fid if we are only doing O_RDONLY open

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>

3 files changed, 6 insertions, 3 deletions

diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c
index 3337d58d0fc..6997eb62fbb 100644
--- a/fs/9p/vfs_file.c
+++ b/fs/9p/vfs_file.c
@@ -91,7 +91,8 @@ int v9fs_file_open(struct inode *inode, struct file *file)
 
         file->private_data = fid;
         mutex_lock(&v9inode->v_mutex);
-        if (v9ses->cache && !v9inode->writeback_fid) {
+        if (v9ses->cache && !v9inode->writeback_fid &&
+            ((file->f_flags & O_ACCMODE) != O_RDONLY)) {
                 /*
                  * clone a fid and add it to writeback_fid
                  * we do it during open time instead of
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index 0afbbb450fa..774a20af01e 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -652,7 +652,8 @@ v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode,
         if (nd && nd->flags & LOOKUP_OPEN) {
                 v9inode = V9FS_I(dentry->d_inode);
                 mutex_lock(&v9inode->v_mutex);
-                if (v9ses->cache && !v9inode->writeback_fid) {
+                if (v9ses->cache && !v9inode->writeback_fid &&
+                    ((flags & O_ACCMODE) != O_RDONLY)) {
                         /*
                          * clone a fid and add it to writeback_fid
                          * we do it during open time instead of
diff --git a/fs/9p/vfs_inode_dotl.c b/fs/9p/vfs_inode_dotl.c
index 0a0ac30d51d..8b616dc3567 100644
--- a/fs/9p/vfs_inode_dotl.c
+++ b/fs/9p/vfs_inode_dotl.c
@@ -246,7 +246,8 @@ v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, int omode,
 
         v9inode = V9FS_I(inode);
         mutex_lock(&v9inode->v_mutex);
-        if (v9ses->cache && !v9inode->writeback_fid) {
+        if (v9ses->cache && !v9inode->writeback_fid &&
+            ((flags & O_ACCMODE) != O_RDONLY)) {
                 /*
                  * clone a fid and add it to writeback_fid
                  * we do it during open time instead of