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>

diff --git a/fs/9p/fid.c b/fs/9p/fid.c
index 0ee5945..85b67ff 100644 (file)
--- a/fs/9p/fid.c
+++ b/fs/9p/fid.c
@@ -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);

diff --git a/fs/9p/v9fs.h b/fs/9p/v9fs.h
index 9665c2b..e5ebedf 100644 (file)
--- a/fs/9p/v9fs.h
+++ b/fs/9p/v9fs.h
@@ -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 */

diff --git a/fs/9p/vfs_super.c b/fs/9p/vfs_super.c
index acdc265..feef6cd 100644 (file)
--- a/fs/9p/vfs_super.c
+++ b/fs/9p/vfs_super.c
@@ -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,

diff --git a/include/net/9p/9p.h b/include/net/9p/9p.h
index cdf2e8a..d2df55b 100644 (file)
--- a/include/net/9p/9p.h
+++ b/include/net/9p/9p.h
@@ -139,8 +139,6 @@ do { \
  */
 
 enum p9_msg_t {
-       P9_TSYNCFS = 0,
-       P9_RSYNCFS,
        P9_TLERROR = 6,
        P9_RLERROR,
        P9_TSTATFS = 8,

diff --git a/include/net/9p/client.h b/include/net/9p/client.h
index 85c1413..59b5df5 100644 (file)
--- a/include/net/9p/client.h
+++ b/include/net/9p/client.h
@@ -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);

diff --git a/net/9p/client.c b/net/9p/client.c
index 48b8e08..d72aac7 100644 (file)
--- a/net/9p/client.c
+++ b/net/9p/client.c
@@ -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;