9p: Reorganization of 9p file system code

This patchset moves non-filesystem interfaces of v9fs from fs/9p to net/9p.
It moves the transport, packet marshalling and connection layers to net/9p
leaving only the VFS related files in fs/9p.  This work is being done in
preparation for in-kernel 9p servers as well as alternate 9p clients (other
than VFS).

Signed-off-by: Latchesar Ionkov <lucho@ionkov.net>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>

1 files changed, 37 insertions, 54 deletions

diff --git a/fs/9p/vfs_super.c b/fs/9p/vfs_super.c
index 7bdf8b32684..f6a0519ade8 100644
--- a/fs/9p/vfs_super.c
+++ b/fs/9p/vfs_super.c
@@ -37,10 +37,10 @@
 #include <linux/mount.h>
 #include <linux/idr.h>
 #include <linux/sched.h>
+#include <net/9p/9p.h>
+#include <net/9p/client.h>
 
-#include "debug.h"
 #include "v9fs.h"
-#include "9p.h"
 #include "v9fs_vfs.h"
 #include "fid.h"
 
@@ -107,41 +107,48 @@ static int v9fs_get_sb(struct file_system_type *fs_type, int flags,
 		       struct vfsmount *mnt)
 {
 	struct super_block *sb = NULL;
-	struct v9fs_fcall *fcall = NULL;
 	struct inode *inode = NULL;
 	struct dentry *root = NULL;
 	struct v9fs_session_info *v9ses = NULL;
-	struct v9fs_fid *root_fid = NULL;
+	struct p9_stat *st = NULL;
 	int mode = S_IRWXUGO | S_ISVTX;
 	uid_t uid = current->fsuid;
 	gid_t gid = current->fsgid;
-	int stat_result = 0;
-	int newfid = 0;
+	struct p9_fid *fid;
 	int retval = 0;
 
-	dprintk(DEBUG_VFS, " \n");
+	P9_DPRINTK(P9_DEBUG_VFS, " \n");
 
 	v9ses = kzalloc(sizeof(struct v9fs_session_info), GFP_KERNEL);
 	if (!v9ses)
 		return -ENOMEM;
 
-	if ((newfid = v9fs_session_init(v9ses, dev_name, data)) < 0) {
-		dprintk(DEBUG_ERROR, "problem initiating session\n");
-		retval = newfid;
-		goto out_free_session;
+	fid = v9fs_session_init(v9ses, dev_name, data);
+	if (IS_ERR(fid)) {
+		retval = PTR_ERR(fid);
+		fid = NULL;
+		kfree(v9ses);
+		v9ses = NULL;
+		goto error;
+	}
+
+	st = p9_client_stat(fid);
+	if (IS_ERR(st)) {
+		retval = PTR_ERR(st);
+		goto error;
 	}
 
 	sb = sget(fs_type, NULL, v9fs_set_super, v9ses);
 	if (IS_ERR(sb)) {
 		retval = PTR_ERR(sb);
-		goto out_close_session;
+		goto error;
 	}
 	v9fs_fill_super(sb, v9ses, flags);
 
 	inode = v9fs_get_inode(sb, S_IFDIR | mode);
 	if (IS_ERR(inode)) {
 		retval = PTR_ERR(inode);
-		goto put_back_sb;
+		goto error;
 	}
 
 	inode->i_uid = uid;
@@ -150,54 +157,30 @@ static int v9fs_get_sb(struct file_system_type *fs_type, int flags,
 	root = d_alloc_root(inode);
 	if (!root) {
 		retval = -ENOMEM;
-		goto put_back_sb;
+		goto error;
 	}
 
 	sb->s_root = root;
+	root->d_inode->i_ino = v9fs_qid2ino(&st->qid);
+	v9fs_stat2inode(st, root->d_inode, sb);
+	v9fs_fid_add(root, fid);
 
-	stat_result = v9fs_t_stat(v9ses, newfid, &fcall);
-	if (stat_result < 0) {
-		dprintk(DEBUG_ERROR, "stat error\n");
-		v9fs_t_clunk(v9ses, newfid);
-	} else {
-		/* Setup the Root Inode */
-		root_fid = v9fs_fid_create(v9ses, newfid);
-		if (root_fid == NULL) {
-			retval = -ENOMEM;
-			goto put_back_sb;
-		}
-
-		retval = v9fs_fid_insert(root_fid, root);
-		if (retval < 0) {
-			kfree(fcall);
-			goto put_back_sb;
-		}
-
-		root_fid->qid = fcall->params.rstat.stat.qid;
-		root->d_inode->i_ino =
-		    v9fs_qid2ino(&fcall->params.rstat.stat.qid);
-		v9fs_stat2inode(&fcall->params.rstat.stat, root->d_inode, sb);
-	}
+	return simple_set_mnt(mnt, sb);
 
-	kfree(fcall);
+error:
+	if (fid)
+		p9_client_clunk(fid);
 
-	if (stat_result < 0) {
-		retval = stat_result;
-		goto put_back_sb;
+	if (v9ses) {
+		v9fs_session_close(v9ses);
+		kfree(v9ses);
 	}
 
-	return simple_set_mnt(mnt, sb);
-
-out_close_session:
-	v9fs_session_close(v9ses);
-out_free_session:
-	kfree(v9ses);
-	return retval;
+	if (sb) {
+		up_write(&sb->s_umount);
+		deactivate_super(sb);
+	}
 
-put_back_sb:
-	/* deactivate_super calls v9fs_kill_super which will frees the rest */
-	up_write(&sb->s_umount);
-	deactivate_super(sb);
 	return retval;
 }
 
@@ -211,7 +194,7 @@ static void v9fs_kill_super(struct super_block *s)
 {
 	struct v9fs_session_info *v9ses = s->s_fs_info;
 
-	dprintk(DEBUG_VFS, " %p\n", s);
+	P9_DPRINTK(P9_DEBUG_VFS, " %p\n", s);
 
 	v9fs_dentry_release(s->s_root);	/* clunk root */
 
@@ -219,7 +202,7 @@ static void v9fs_kill_super(struct super_block *s)
 
 	v9fs_session_close(v9ses);
 	kfree(v9ses);
-	dprintk(DEBUG_VFS, "exiting kill_super\n");
+	P9_DPRINTK(P9_DEBUG_VFS, "exiting kill_super\n");
 }
 
 /**