[PATCH v6 01/27] saner calling conventions for nfs_fs_mount_common()

Scott Mayhew
2019-12-10T12:32:05Z

From: Al Viro <viro@zeniv.linux.org.uk>

Allow it to take ERR_PTR() for server and return ERR_CAST() of it in
such case. All callers used to open-code that...

Reviewed-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/nfs/nfs4super.c | 16 +---------------
fs/nfs/super.c | 11 ++++-------
2 files changed, 5 insertions(+), 22 deletions(-)

diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c
index 2c9cbade561a..beeaed872e6c 100644
--- a/fs/nfs/nfs4super.c
+++ b/fs/nfs/nfs4super.c
@@ -110,21 +110,12 @@ nfs4_remote_mount(struct file_system_type *fs_type, int flags,
{
struct nfs_mount_info *mount_info = info;
struct nfs_server *server;
- struct dentry *mntroot = ERR_PTR(-ENOMEM);

mount_info->set_security = nfs_set_sb_security;

/* Get a volume representation */
server = nfs4_create_server(mount_info, &nfs_v4);
- if (IS_ERR(server)) {
- mntroot = ERR_CAST(server);
- goto out;
- }
-
- mntroot = nfs_fs_mount_common(server, flags, dev_name, mount_info, &nfs_v4);
-
-out:
- return mntroot;
+ return nfs_fs_mount_common(server, flags, dev_name, mount_info, &nfs_v4);
}

static struct vfsmount *nfs_do_root_mount(struct file_system_type *fs_type,
@@ -280,11 +271,6 @@ nfs4_remote_referral_mount(struct file_system_type *fs_type, int flags,

/* create a new volume representation */
server = nfs4_create_referral_server(mount_info.cloned, mount_info.mntfh);
- if (IS_ERR(server)) {
- mntroot = ERR_CAST(server);
- goto out;
- }
-
mntroot = nfs_fs_mount_common(server, flags, dev_name, &mount_info, &nfs_v4);
out:
nfs_free_fhandle(mount_info.mntfh);
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index 8d8d04bb9d64..f074c3773f0e 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -1903,9 +1903,6 @@ struct dentry *nfs_try_mount(int flags, const char *dev_name,
else
server = nfs_mod->rpc_ops->create_server(mount_info, nfs_mod);

- if (IS_ERR(server))
- return ERR_CAST(server);
-
return nfs_fs_mount_common(server, flags, dev_name, mount_info, nfs_mod);
}
EXPORT_SYMBOL_GPL(nfs_try_mount);
@@ -2666,6 +2663,9 @@ struct dentry *nfs_fs_mount_common(struct nfs_server *server,
};
int error;

+ if (IS_ERR(server))
+ return ERR_CAST(server);
+
if (server->flags & NFS_MOUNT_UNSHARED)
compare_super = NULL;

@@ -2814,10 +2814,7 @@ nfs_xdev_mount(struct file_system_type *fs_type, int flags,
/* create a new volume representation */
server = nfs_mod->rpc_ops->clone_server(NFS_SB(data->sb), data->fh, data->fattr, data->authflavor);

- if (IS_ERR(server))
- mntroot = ERR_CAST(server);
- else
- mntroot = nfs_fs_mount_common(server, flags,
+ mntroot = nfs_fs_mount_common(server, flags,
dev_name, &mount_info, nfs_mod);

dprintk("<-- nfs_xdev_mount() = %ld\n",
--
2.17.2