9p: fix error path during early mount
There was some cleanup issues during early mount which would trigger
a kernel bug for certain types of failure. This patch reorganizes the
cleanup to get rid of the bad behavior.
This also merges the 9pnet and 9pnet_fd modules for the purpose of
configuration and initialization. Keeping the fd transport separate
from the core 9pnet code seemed like a good idea at the time, but in
practice has caused more harm and confusion than good.
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
diff --git a/fs/9p/v9fs.c b/fs/9p/v9fs.c
index 5c1ccaf..047c791 100644
--- a/fs/9p/v9fs.c
+++ b/fs/9p/v9fs.c
@@ -206,12 +206,14 @@
v9ses->uid = ~0;
v9ses->dfltuid = V9FS_DEFUID;
v9ses->dfltgid = V9FS_DEFGID;
- v9ses->options = kstrdup(data, GFP_KERNEL);
- if (!v9ses->options) {
- P9_DPRINTK(P9_DEBUG_ERROR,
+ if (data) {
+ v9ses->options = kstrdup(data, GFP_KERNEL);
+ if (!v9ses->options) {
+ P9_DPRINTK(P9_DEBUG_ERROR,
"failed to allocate copy of option string\n");
- retval = -ENOMEM;
- goto error;
+ retval = -ENOMEM;
+ goto error;
+ }
}
rc = v9fs_parse_options(v9ses);
@@ -260,7 +262,6 @@
return fid;
error:
- v9fs_session_close(v9ses);
return ERR_PTR(retval);
}
diff --git a/fs/9p/vfs_super.c b/fs/9p/vfs_super.c
index ba10f17..bf59c39 100644
--- a/fs/9p/vfs_super.c
+++ b/fs/9p/vfs_super.c
@@ -128,29 +128,26 @@
fid = v9fs_session_init(v9ses, dev_name, data);
if (IS_ERR(fid)) {
retval = PTR_ERR(fid);
- fid = NULL;
- kfree(v9ses);
- v9ses = NULL;
- goto error;
+ goto close_session;
}
st = p9_client_stat(fid);
if (IS_ERR(st)) {
retval = PTR_ERR(st);
- goto error;
+ goto clunk_fid;
}
sb = sget(fs_type, NULL, v9fs_set_super, v9ses);
if (IS_ERR(sb)) {
retval = PTR_ERR(sb);
- goto error;
+ goto free_stat;
}
v9fs_fill_super(sb, v9ses, flags);
inode = v9fs_get_inode(sb, S_IFDIR | mode);
if (IS_ERR(inode)) {
retval = PTR_ERR(inode);
- goto error;
+ goto release_sb;
}
inode->i_uid = uid;
@@ -159,7 +156,7 @@
root = d_alloc_root(inode);
if (!root) {
retval = -ENOMEM;
- goto error;
+ goto release_sb;
}
sb->s_root = root;
@@ -170,21 +167,22 @@
return simple_set_mnt(mnt, sb);
-error:
- kfree(st);
- if (fid)
- p9_client_clunk(fid);
-
- if (v9ses) {
- v9fs_session_close(v9ses);
- kfree(v9ses);
- }
-
+release_sb:
if (sb) {
up_write(&sb->s_umount);
deactivate_super(sb);
}
+free_stat:
+ kfree(st);
+
+clunk_fid:
+ p9_client_clunk(fid);
+
+close_session:
+ v9fs_session_close(v9ses);
+ kfree(v9ses);
+
return retval;
}