fs/9p: set the cached file_operations struct during inode init

With the old code we were not setting the file->f_op
with cached file operations during creat.

(format correction by jvrao@linux.vnet.ibm.com)

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, 15 insertions, 16 deletions

diff --git a/fs/9p/v9fs_vfs.h b/fs/9p/v9fs_vfs.h
index b789f8e597ec..e4d5540cbb70 100644
--- a/fs/9p/v9fs_vfs.h
+++ b/fs/9p/v9fs_vfs.h
@@ -45,6 +45,8 @@ extern const struct file_operations v9fs_dir_operations;
 extern const struct file_operations v9fs_dir_operations_dotl;
 extern const struct dentry_operations v9fs_dentry_operations;
 extern const struct dentry_operations v9fs_cached_dentry_operations;
+extern const struct file_operations v9fs_cached_file_operations;
+extern const struct file_operations v9fs_cached_file_operations_dotl;
 
 #ifdef CONFIG_9P_FSCACHE
 struct inode *v9fs_alloc_inode(struct super_block *sb);
diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c
index 240c30674396..6a671000263f 100644
--- a/fs/9p/vfs_file.c
+++ b/fs/9p/vfs_file.c
@@ -44,9 +44,6 @@
 #include "fid.h"
 #include "cache.h"
 
-static const struct file_operations v9fs_cached_file_operations;
-static const struct file_operations v9fs_cached_file_operations_dotl;
-
 /**
  * v9fs_file_open - open a file (or directory)
  * @inode: inode to be opened
@@ -89,19 +86,12 @@ int v9fs_file_open(struct inode *inode, struct file *file)
         }
 
         file->private_data = fid;
+#ifdef CONFIG_9P_FSCACHE
         if ((fid->qid.version) && (v9ses->cache)) {
                 P9_DPRINTK(P9_DEBUG_VFS, "cached");
-                /* enable cached file options */
-                if(file->f_op == &v9fs_file_operations)
-                        file->f_op = &v9fs_cached_file_operations;
-                else if (file->f_op == &v9fs_file_operations_dotl)
-                        file->f_op = &v9fs_cached_file_operations_dotl;
-
-#ifdef CONFIG_9P_FSCACHE
                 v9fs_cache_inode_set_cookie(inode, file);
-#endif
         }
-
+#endif
         return 0;
 }
 
@@ -505,7 +495,7 @@ int v9fs_file_fsync_dotl(struct file *filp, int datasync)
         return retval;
 }
 
-static const struct file_operations v9fs_cached_file_operations = {
+const struct file_operations v9fs_cached_file_operations = {
         .llseek = generic_file_llseek,
         .read = do_sync_read,
         .aio_read = generic_file_aio_read,
@@ -517,7 +507,7 @@ static const struct file_operations v9fs_cached_file_operations = {
         .fsync = v9fs_file_fsync,
 };
 
-static const struct file_operations v9fs_cached_file_operations_dotl = {
+const struct file_operations v9fs_cached_file_operations_dotl = {
         .llseek = generic_file_llseek,
         .read = do_sync_read,
         .aio_read = generic_file_aio_read,
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index b76a40bdf4c2..83af2b7e65db 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -292,10 +292,17 @@ struct inode *v9fs_get_inode(struct super_block *sb, int mode)
         case S_IFREG:
                 if (v9fs_proto_dotl(v9ses)) {
                         inode->i_op = &v9fs_file_inode_operations_dotl;
-                        inode->i_fop = &v9fs_file_operations_dotl;
+                        if (v9ses->cache)
+                                inode->i_fop =
+                                        &v9fs_cached_file_operations_dotl;
+                        else
+                                inode->i_fop = &v9fs_file_operations_dotl;
                 } else {
                         inode->i_op = &v9fs_file_inode_operations;
-                        inode->i_fop = &v9fs_file_operations;
+                        if (v9ses->cache)
+                                inode->i_fop = &v9fs_cached_file_operations;
+                        else
+                                inode->i_fop = &v9fs_file_operations;
                 }
 
                 break;