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From: Scott Mayhew <smayhew@redhat.com>
To: anna.schumaker@netapp.com, trond.myklebust@hammerspace.com
Cc: dhowells@redhat.com, viro@zeniv.linux.org.uk,
	linux-nfs@vger.kernel.org, linux-fsdevel@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH v3 06/26] nfs4: fold nfs_do_root_mount/nfs_follow_remote_path
Date: Wed, 11 Sep 2019 12:16:01 -0400
Message-ID: <20190911161621.19832-7-smayhew@redhat.com> (raw)
In-Reply-To: <20190911161621.19832-1-smayhew@redhat.com>

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

Reviewed-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
 fs/nfs/nfs4super.c | 88 +++++++++++++++++++---------------------------
 1 file changed, 37 insertions(+), 51 deletions(-)

diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c
index a0b66f98f6ba..91ba1b6741dc 100644
--- a/fs/nfs/nfs4super.c
+++ b/fs/nfs/nfs4super.c
@@ -101,37 +101,6 @@ nfs4_remote_mount(struct file_system_type *fs_type, int flags,
 	return nfs_fs_mount_common(flags, dev_name, info, &nfs_v4);
 }
 
-static struct vfsmount *nfs_do_root_mount(struct nfs_server *server, int flags,
-					  struct nfs_mount_info *info,
-					  const char *hostname)
-{
-	struct vfsmount *root_mnt;
-	char *root_devname;
-	size_t len;
-
-	if (IS_ERR(server))
-		return ERR_CAST(server);
-
-	len = strlen(hostname) + 5;
-	root_devname = kmalloc(len, GFP_KERNEL);
-	if (root_devname == NULL) {
-		nfs_free_server(server);
-		return ERR_PTR(-ENOMEM);
-	}
-	/* Does hostname needs to be enclosed in brackets? */
-	if (strchr(hostname, ':'))
-		snprintf(root_devname, len, "[%s]:/", hostname);
-	else
-		snprintf(root_devname, len, "%s:/", hostname);
-	info->server = server;
-	root_mnt = vfs_kern_mount(&nfs4_remote_fs_type, flags, root_devname, info);
-	if (info->server)
-		nfs_free_server(info->server);
-	info->server = NULL;
-	kfree(root_devname);
-	return root_mnt;
-}
-
 struct nfs_referral_count {
 	struct list_head list;
 	const struct task_struct *task;
@@ -198,11 +167,38 @@ static void nfs_referral_loop_unprotect(void)
 	kfree(p);
 }
 
-static struct dentry *nfs_follow_remote_path(struct vfsmount *root_mnt,
-		const char *export_path)
+static struct dentry *do_nfs4_mount(struct nfs_server *server, int flags,
+				    struct nfs_mount_info *info,
+				    const char *hostname,
+				    const char *export_path)
 {
+	struct vfsmount *root_mnt;
 	struct dentry *dentry;
+	char *root_devname;
 	int err;
+	size_t len;
+
+	if (IS_ERR(server))
+		return ERR_CAST(server);
+
+	len = strlen(hostname) + 5;
+	root_devname = kmalloc(len, GFP_KERNEL);
+	if (root_devname == NULL) {
+		nfs_free_server(server);
+		return ERR_PTR(-ENOMEM);
+	}
+
+	/* Does hostname needs to be enclosed in brackets? */
+	if (strchr(hostname, ':'))
+		snprintf(root_devname, len, "[%s]:/", hostname);
+	else
+		snprintf(root_devname, len, "%s:/", hostname);
+	info->server = server;
+	root_mnt = vfs_kern_mount(&nfs4_remote_fs_type, flags, root_devname, info);
+	if (info->server)
+		nfs_free_server(info->server);
+	info->server = NULL;
+	kfree(root_devname);
 
 	if (IS_ERR(root_mnt))
 		return ERR_CAST(root_mnt);
@@ -223,22 +219,17 @@ struct dentry *nfs4_try_mount(int flags, const char *dev_name,
 			      struct nfs_mount_info *mount_info,
 			      struct nfs_subversion *nfs_mod)
 {
-	char *export_path;
-	struct vfsmount *root_mnt;
-	struct dentry *res;
 	struct nfs_parsed_mount_data *data = mount_info->parsed;
+	struct dentry *res;
 
 	mount_info->set_security = nfs_set_sb_security;
 
 	dfprintk(MOUNT, "--> nfs4_try_mount()\n");
 
-	export_path = data->nfs_server.export_path;
-	root_mnt = nfs_do_root_mount(
-			nfs4_create_server(mount_info, &nfs_v4),
-			flags, mount_info,
-			data->nfs_server.hostname);
-
-	res = nfs_follow_remote_path(root_mnt, export_path);
+	res = do_nfs4_mount(nfs4_create_server(mount_info, &nfs_v4),
+			    flags, mount_info,
+			    data->nfs_server.hostname,
+			    data->nfs_server.export_path);
 
 	dfprintk(MOUNT, "<-- nfs4_try_mount() = %d%s\n",
 		 PTR_ERR_OR_ZERO(res),
@@ -258,8 +249,6 @@ static struct dentry *nfs4_referral_mount(struct file_system_type *fs_type,
 		.set_security = nfs_clone_sb_security,
 		.cloned = data,
 	};
-	char *export_path;
-	struct vfsmount *root_mnt;
 	struct dentry *res;
 
 	dprintk("--> nfs4_referral_mount()\n");
@@ -268,13 +257,10 @@ static struct dentry *nfs4_referral_mount(struct file_system_type *fs_type,
 	if (!mount_info.mntfh)
 		return ERR_PTR(-ENOMEM);
 
-	export_path = data->mnt_path;
-	root_mnt = nfs_do_root_mount(
-			nfs4_create_referral_server(mount_info.cloned,
-						    mount_info.mntfh),
-			flags, &mount_info, data->hostname);
+	res = do_nfs4_mount(nfs4_create_referral_server(mount_info.cloned,
+							mount_info.mntfh),
+			    flags, &mount_info, data->hostname, data->mnt_path);
 
-	res = nfs_follow_remote_path(root_mnt, export_path);
 	dprintk("<-- nfs4_referral_mount() = %d%s\n",
 		PTR_ERR_OR_ZERO(res),
 		IS_ERR(res) ? " [error]" : "");
-- 
2.17.2


  parent reply index

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-11 16:15 [PATCH v3 00/26] nfs: Mount API conversion Scott Mayhew
2019-09-11 16:15 ` [PATCH v3 01/26] saner calling conventions for nfs_fs_mount_common() Scott Mayhew
2019-09-11 16:15 ` [PATCH v3 02/26] nfs: stash server into struct nfs_mount_info Scott Mayhew
2019-09-11 16:15 ` [PATCH v3 03/26] nfs: lift setting mount_info from nfs4_remote{,_referral}_mount Scott Mayhew
2019-09-11 16:15 ` [PATCH v3 04/26] nfs: fold nfs4_remote_fs_type and nfs4_remote_referral_fs_type Scott Mayhew
2019-09-11 16:16 ` [PATCH v3 05/26] nfs: don't bother setting/restoring export_path around do_nfs_root_mount() Scott Mayhew
2019-09-11 16:16 ` Scott Mayhew [this message]
2019-09-11 16:16 ` [PATCH v3 07/26] nfs: lift setting mount_info from nfs_xdev_mount() Scott Mayhew
2019-09-11 16:16 ` [PATCH v3 08/26] nfs: stash nfs_subversion reference into nfs_mount_info Scott Mayhew
2019-09-11 16:16 ` [PATCH v3 09/26] nfs: don't bother passing nfs_subversion to ->try_mount() and nfs_fs_mount_common() Scott Mayhew
2019-09-11 16:16 ` [PATCH v3 10/26] nfs: merge xdev and remote file_system_type Scott Mayhew
2019-09-11 16:16 ` [PATCH v3 11/26] nfs: unexport nfs_fs_mount_common() Scott Mayhew
2019-09-11 16:16 ` [PATCH v3 12/26] nfs: don't pass nfs_subversion to ->create_server() Scott Mayhew
2019-09-11 16:16 ` [PATCH v3 13/26] nfs: get rid of mount_info ->fill_super() Scott Mayhew
2019-09-11 16:16 ` [PATCH v3 14/26] nfs_clone_sb_security(): simplify the check for server bogosity Scott Mayhew
2019-09-11 16:16 ` [PATCH v3 15/26] nfs: get rid of ->set_security() Scott Mayhew
2019-09-11 16:16 ` [PATCH v3 16/26] NFS: Move mount parameterisation bits into their own file Scott Mayhew
2019-09-11 18:24   ` Chuck Lever
2019-09-12 17:35     ` Scott Mayhew
     [not found]     ` <014d1a8425545b633b982f63d78665b73bcf0075.camel@hammerspace.com>
2019-09-12 17:36       ` Scott Mayhew
2019-09-11 16:16 ` [PATCH v3 17/26] NFS: Constify mount argument match tables Scott Mayhew
2019-09-11 16:16 ` [PATCH v3 18/26] NFS: Rename struct nfs_parsed_mount_data to struct nfs_fs_context Scott Mayhew
2019-09-11 16:16 ` [PATCH v3 19/26] NFS: Split nfs_parse_mount_options() Scott Mayhew
2019-09-11 16:16 ` [PATCH v3 20/26] NFS: Deindent nfs_fs_context_parse_option() Scott Mayhew
2019-09-11 16:16 ` [PATCH v3 21/26] NFS: Add a small buffer in nfs_fs_context to avoid string dup Scott Mayhew
2019-09-11 16:16 ` [PATCH v3 22/26] NFS: Do some tidying of the parsing code Scott Mayhew
2019-09-11 16:16 ` [PATCH v3 23/26] NFS: rename nfs_fs_context pointer arg in a few functions Scott Mayhew
2019-09-11 16:16 ` [PATCH v3 24/26] NFS: Convert mount option parsing to use functionality from fs_parser.h Scott Mayhew
2019-09-11 16:16 ` [PATCH v3 25/26] NFS: Add fs_context support Scott Mayhew
2019-09-11 16:16 ` [PATCH v3 26/26] NFS: Attach supplementary error information to fs_context Scott Mayhew

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