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Registered in England and Wales under Company Registration No. 3798903 Subject: [PATCH 06/23] nfs4: fold nfs_do_root_mount/nfs_follow_remote_path From: David Howells To: trond.myklebust@hammerspace.com, anna.schumaker@netapp.com Cc: Al Viro , dhowells@redhat.com, viro@zeniv.linux.org.uk, linux-nfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Date: Thu, 23 May 2019 17:16:42 +0100 Message-ID: <155862820218.26654.5552330864350722718.stgit@warthog.procyon.org.uk> In-Reply-To: <155862813755.26654.563679411147031501.stgit@warthog.procyon.org.uk> References: <155862813755.26654.563679411147031501.stgit@warthog.procyon.org.uk> User-Agent: StGit/unknown-version MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.28]); Thu, 23 May 2019 16:16:47 +0000 (UTC) Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org From: Al Viro Reviewed-by: David Howells Signed-off-by: Al Viro --- 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 d498aa5acab0..1710df8240fb 100644 --- a/fs/nfs/nfs4super.c +++ b/fs/nfs/nfs4super.c @@ -100,37 +100,6 @@ 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; @@ -197,11 +166,38 @@ 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); @@ -222,22 +218,17 @@ 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), @@ -257,8 +248,6 @@ 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"); @@ -267,13 +256,10 @@ 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]" : "");