From: Bryan Schumaker <bjschuma@xxxxxxxxxx>
Signed-off-by: Bryan Schumaker <bjschuma@xxxxxxxxxx>
---
fs/nfs/super.c | 90 +++++++++-----------------------------------------------
1 file changed, 14 insertions(+), 76 deletions(-)
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index 9ed670b..21b229c 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -2774,95 +2774,33 @@ static struct dentry *
nfs4_remote_referral_mount(struct file_system_type *fs_type, int flags,
const char *dev_name, void *raw_data)
{
- struct nfs_clone_mount *data = raw_data;
- struct super_block *s;
+ struct nfs_mount_info mount_info = {
+ .fill_super = nfs4_fill_super,
+ .set_security = nfs_clone_sb_security,
+ .cloned = raw_data,
+ .unshared = NFS4_MOUNT_UNSHARED,
+ };
struct nfs_server *server;
- struct dentry *mntroot;
+ struct dentry *mntroot = ERR_PTR(-ENOMEM);
struct nfs_fh *mntfh;
- int (*compare_super)(struct super_block *, void *) = nfs_compare_super;
- struct nfs_sb_mountdata sb_mntdata = {
- .mntflags = flags,
- };
- int error = -ENOMEM;
dprintk("--> nfs4_referral_get_sb()\n");
mntfh = nfs_alloc_fhandle();
- if (mntfh == NULL)
- goto out_err_nofh;
+ if (mount_info.cloned == NULL || mntfh == NULL)
+ goto out;
/* create a new volume representation */
- server = nfs4_create_referral_server(data, mntfh);
+ server = nfs4_create_referral_server(mount_info.cloned, mntfh);
if (IS_ERR(server)) {
- error = PTR_ERR(server);
- goto out_err_noserver;
- }
- sb_mntdata.server = server;
-
- if (server->flags & NFS4_MOUNT_UNSHARED)
- compare_super = NULL;
-
- /* -o noac implies -o sync */
- if (server->flags & NFS_MOUNT_NOAC)
- sb_mntdata.mntflags |= MS_SYNCHRONOUS;
-
- /* Get a superblock - note that we may end up sharing one that already exists */
- s = sget(&nfs4_fs_type, compare_super, nfs_set_super, &sb_mntdata);
- if (IS_ERR(s)) {
- error = PTR_ERR(s);
- goto out_err_nosb;
- }
-
- if (s->s_fs_info != server) {
- nfs_free_server(server);
- server = NULL;
- } else {
- error = nfs_bdi_register(server);
- if (error)
- goto error_splat_bdi;
- }
-
- if (!s->s_root) {
- /* initial superblock/root creation */
- nfs4_fill_super(s, NULL);
- nfs_fscache_get_super_cookie(s, NULL, data);
- }
-
- mntroot = nfs_get_root(s, mntfh, dev_name);
- if (IS_ERR(mntroot)) {
- error = PTR_ERR(mntroot);
- goto error_splat_super;
- }
- if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) {
- dput(mntroot);
- error = -ESTALE;
- goto error_splat_super;
+ mntroot = ERR_CAST(server);
+ goto out;
}
- s->s_flags |= MS_ACTIVE;
-
- security_sb_clone_mnt_opts(data->sb, s);
-
+ mntroot = nfs_fs_mount_common(&nfs4_fs_type, server, flags, dev_name, mntfh, &mount_info);
+out:
nfs_free_fhandle(mntfh);
- dprintk("<-- nfs4_referral_get_sb() = 0\n");
return mntroot;
-
-out_err_nosb:
- nfs_free_server(server);
-out_err_noserver:
- nfs_free_fhandle(mntfh);
-out_err_nofh:
- dprintk("<-- nfs4_referral_get_sb() = %d [error]\n", error);
- return ERR_PTR(error);
-
-error_splat_super:
- if (server && !s->s_root)
- bdi_unregister(&server->backing_dev_info);
-error_splat_bdi:
- deactivate_locked_super(s);
- nfs_free_fhandle(mntfh);
- dprintk("<-- nfs4_referral_get_sb() = %d [splat]\n", error);
- return ERR_PTR(error);
}
/*
--
1.7.10
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