[RFC PATCH -V1 1/7] fs/9p: set the cached file_operations struct during inode init

Aneesh Kumar K.V
2011-01-29T19:26:40Z

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

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
---
fs/9p/v9fs_vfs.h | 2 ++
fs/9p/vfs_file.c | 18 ++++--------------
fs/9p/vfs_inode.c | 10 ++++++++--
3 files changed, 14 insertions(+), 16 deletions(-)

diff --git a/fs/9p/v9fs_vfs.h b/fs/9p/v9fs_vfs.h
index b789f8e..e4d5540 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 240c306..6a67100 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 b76a40b..45e7ea4 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -292,10 +292,16 @@ 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;
--
1.7.1