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9p: revert tsyncfs related changes 

Now that we use write_inode to flush server
cache related to fid, we don't need tsyncfs either fort dotl or dotu
protocols. For dotu this helps to do a more efficient server flush.

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>
This commit is contained in:
Aneesh Kumar K.V 2011-03-24 20:38:35 +05:30 committed by Eric Van Hensbergen
parent c2ed388021
commit df5d8c80f1
6 changed files with 11 additions and 62 deletions
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15
fs/9p/fid.c
View File

@ -286,11 +286,9 @@ static struct p9_fid *v9fs_fid_clone_with_uid(struct dentry *dentry, uid_t uid)
struct p9_fid *v9fs_writeback_fid(struct dentry *dentry)
{
int err, flags;
int err;
struct p9_fid *fid;
struct v9fs_session_info *v9ses;
v9ses = v9fs_dentry2v9ses(dentry);
fid = v9fs_fid_clone_with_uid(dentry, 0);
if (IS_ERR(fid))
goto error_out;
@ -299,17 +297,8 @@ struct p9_fid *v9fs_writeback_fid(struct dentry *dentry)
* dirty pages. We always request for the open fid in read-write
* mode so that a partial page write which result in page
* read can work.
*
* we don't have a tsyncfs operation for older version
* of protocol. So make sure the write back fid is
* opened in O_SYNC mode.
*/
if (!v9fs_proto_dotl(v9ses))
flags = O_RDWR | O_SYNC;
else
flags = O_RDWR;
err = p9_client_open(fid, flags);
err = p9_client_open(fid, O_RDWR);
if (err < 0) {
p9_client_clunk(fid);
fid = ERR_PTR(err);

1
fs/9p/v9fs.h
View File

@ -116,7 +116,6 @@ struct v9fs_session_info {
struct list_head slist; /* list of sessions registered with v9fs */
struct backing_dev_info bdi;
struct rw_semaphore rename_sem;
struct p9_fid *root_fid; /* Used for file system sync */
};
/* cache_validity flags */

33
fs/9p/vfs_super.c
View File

@ -154,6 +154,7 @@ static struct dentry *v9fs_mount(struct file_system_type *fs_type, int flags,
retval = PTR_ERR(inode);
goto release_sb;
}
root = d_alloc_root(inode);
if (!root) {
iput(inode);
@ -185,21 +186,10 @@ static struct dentry *v9fs_mount(struct file_system_type *fs_type, int flags,
p9stat_free(st);
kfree(st);
}
v9fs_fid_add(root, fid);
retval = v9fs_get_acl(inode, fid);
if (retval)
goto release_sb;
/*
* Add the root fid to session info. This is used
* for file system sync. We want a cloned fid here
* so that we can do a sync_filesystem after a
* shrink_dcache_for_umount
*/
v9ses->root_fid = v9fs_fid_clone(root);
if (IS_ERR(v9ses->root_fid)) {
retval = PTR_ERR(v9ses->root_fid);
goto release_sb;
}
v9fs_fid_add(root, fid);
P9_DPRINTK(P9_DEBUG_VFS, " simple set mount, return 0\n");
return dget(sb->s_root);
@ -210,11 +200,15 @@ close_session:
v9fs_session_close(v9ses);
kfree(v9ses);
return ERR_PTR(retval);
release_sb:
/*
* we will do the session_close and root dentry
* release in the below call.
* we will do the session_close and root dentry release
* in the below call. But we need to clunk fid, because we haven't
* attached the fid to dentry so it won't get clunked
* automatically.
*/
p9_client_clunk(fid);
deactivate_locked_super(sb);
return ERR_PTR(retval);
}
@ -232,7 +226,7 @@ static void v9fs_kill_super(struct super_block *s)
P9_DPRINTK(P9_DEBUG_VFS, " %p\n", s);
kill_anon_super(s);
p9_client_clunk(v9ses->root_fid);
v9fs_session_cancel(v9ses);
v9fs_session_close(v9ses);
kfree(v9ses);
@ -285,14 +279,6 @@ done:
return res;
}
static int v9fs_sync_fs(struct super_block *sb, int wait)
{
struct v9fs_session_info *v9ses = sb->s_fs_info;
P9_DPRINTK(P9_DEBUG_VFS, "v9fs_sync_fs: super_block %p\n", sb);
return p9_client_sync_fs(v9ses->root_fid);
}
static int v9fs_drop_inode(struct inode *inode)
{
struct v9fs_session_info *v9ses;
@ -365,7 +351,6 @@ static const struct super_operations v9fs_super_ops = {
static const struct super_operations v9fs_super_ops_dotl = {
.alloc_inode = v9fs_alloc_inode,
.destroy_inode = v9fs_destroy_inode,
.sync_fs = v9fs_sync_fs,
.statfs = v9fs_statfs,
.drop_inode = v9fs_drop_inode,
.evict_inode = v9fs_evict_inode,

2
include/net/9p/9p.h
View File

@ -139,8 +139,6 @@ do { \
*/
enum p9_msg_t {
P9_TSYNCFS = 0,
P9_RSYNCFS,
P9_TLERROR = 6,
P9_RLERROR,
P9_TSTATFS = 8,

1
include/net/9p/client.h
View File

@ -230,7 +230,6 @@ int p9_client_create_dotl(struct p9_fid *ofid, char *name, u32 flags, u32 mode,
gid_t gid, struct p9_qid *qid);
int p9_client_clunk(struct p9_fid *fid);
int p9_client_fsync(struct p9_fid *fid, int datasync);
int p9_client_sync_fs(struct p9_fid *fid);
int p9_client_remove(struct p9_fid *fid);
int p9_client_read(struct p9_fid *fid, char *data, char __user *udata,
u64 offset, u32 count);

21
net/9p/client.c
View File

@ -1220,27 +1220,6 @@ error:
}
EXPORT_SYMBOL(p9_client_fsync);
int p9_client_sync_fs(struct p9_fid *fid)
{
int err = 0;
struct p9_req_t *req;
struct p9_client *clnt;
P9_DPRINTK(P9_DEBUG_9P, ">>> TSYNC_FS fid %d\n", fid->fid);
clnt = fid->clnt;
req = p9_client_rpc(clnt, P9_TSYNCFS, "d", fid->fid);
if (IS_ERR(req)) {
err = PTR_ERR(req);
goto error;
}
P9_DPRINTK(P9_DEBUG_9P, "<<< RSYNCFS fid %d\n", fid->fid);
p9_free_req(clnt, req);
error:
return err;
}
EXPORT_SYMBOL(p9_client_sync_fs);
int p9_client_clunk(struct p9_fid *fid)
{
int err;