forked from Minki/linux
nfs: switch NFS from ->get_sb() to ->mount()
The last remaining instances of ->get_sb() can be converted ->mount() now - nothing in them uses new vfsmount anymore. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
parent
fd462fb51d
commit
011949811b
132
fs/nfs/super.c
132
fs/nfs/super.c
@ -266,7 +266,8 @@ static int nfs_show_options(struct seq_file *, struct vfsmount *);
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static int nfs_show_devname(struct seq_file *, struct vfsmount *);
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static int nfs_show_path(struct seq_file *, struct vfsmount *);
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static int nfs_show_stats(struct seq_file *, struct vfsmount *);
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static int nfs_get_sb(struct file_system_type *, int, const char *, void *, struct vfsmount *);
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static struct dentry *nfs_fs_mount(struct file_system_type *,
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int, const char *, void *);
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static struct dentry *nfs_xdev_mount(struct file_system_type *fs_type,
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int flags, const char *dev_name, void *raw_data);
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static void nfs_put_super(struct super_block *);
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@ -276,7 +277,7 @@ static int nfs_remount(struct super_block *sb, int *flags, char *raw_data);
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static struct file_system_type nfs_fs_type = {
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.owner = THIS_MODULE,
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.name = "nfs",
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.get_sb = nfs_get_sb,
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.mount = nfs_fs_mount,
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.kill_sb = nfs_kill_super,
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.fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
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};
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@ -307,16 +308,16 @@ static const struct super_operations nfs_sops = {
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#ifdef CONFIG_NFS_V4
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static int nfs4_validate_text_mount_data(void *options,
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struct nfs_parsed_mount_data *args, const char *dev_name);
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static int nfs4_try_mount(int flags, const char *dev_name,
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struct nfs_parsed_mount_data *data, struct vfsmount *mnt);
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static int nfs4_get_sb(struct file_system_type *fs_type,
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int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt);
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static struct dentry *nfs4_try_mount(int flags, const char *dev_name,
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struct nfs_parsed_mount_data *data);
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static struct dentry *nfs4_mount(struct file_system_type *fs_type,
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int flags, const char *dev_name, void *raw_data);
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static struct dentry *nfs4_remote_mount(struct file_system_type *fs_type,
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int flags, const char *dev_name, void *raw_data);
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static struct dentry *nfs4_xdev_mount(struct file_system_type *fs_type,
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int flags, const char *dev_name, void *raw_data);
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static int nfs4_referral_get_sb(struct file_system_type *fs_type,
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int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt);
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static struct dentry *nfs4_referral_mount(struct file_system_type *fs_type,
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int flags, const char *dev_name, void *raw_data);
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static struct dentry *nfs4_remote_referral_mount(struct file_system_type *fs_type,
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int flags, const char *dev_name, void *raw_data);
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static void nfs4_kill_super(struct super_block *sb);
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@ -324,7 +325,7 @@ static void nfs4_kill_super(struct super_block *sb);
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static struct file_system_type nfs4_fs_type = {
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.owner = THIS_MODULE,
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.name = "nfs4",
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.get_sb = nfs4_get_sb,
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.mount = nfs4_mount,
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.kill_sb = nfs4_kill_super,
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.fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
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};
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@ -356,7 +357,7 @@ static struct file_system_type nfs4_remote_referral_fs_type = {
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struct file_system_type nfs4_referral_fs_type = {
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.owner = THIS_MODULE,
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.name = "nfs4",
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.get_sb = nfs4_referral_get_sb,
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.mount = nfs4_referral_mount,
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.kill_sb = nfs4_kill_super,
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.fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
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};
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@ -2295,19 +2296,19 @@ static int nfs_bdi_register(struct nfs_server *server)
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return bdi_register_dev(&server->backing_dev_info, server->s_dev);
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}
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static int nfs_get_sb(struct file_system_type *fs_type,
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int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt)
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static struct dentry *nfs_fs_mount(struct file_system_type *fs_type,
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int flags, const char *dev_name, void *raw_data)
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{
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struct nfs_server *server = NULL;
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struct super_block *s;
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struct nfs_parsed_mount_data *data;
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struct nfs_fh *mntfh;
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struct dentry *mntroot;
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struct dentry *mntroot = ERR_PTR(-ENOMEM);
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int (*compare_super)(struct super_block *, void *) = nfs_compare_super;
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struct nfs_sb_mountdata sb_mntdata = {
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.mntflags = flags,
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};
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int error = -ENOMEM;
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int error;
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data = nfs_alloc_parsed_mount_data(NFS_DEFAULT_VERSION);
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mntfh = nfs_alloc_fhandle();
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@ -2318,12 +2319,14 @@ static int nfs_get_sb(struct file_system_type *fs_type,
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/* Validate the mount data */
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error = nfs_validate_mount_data(raw_data, data, mntfh, dev_name);
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if (error < 0)
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if (error < 0) {
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mntroot = ERR_PTR(error);
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goto out;
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}
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#ifdef CONFIG_NFS_V4
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if (data->version == 4) {
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error = nfs4_try_mount(flags, dev_name, data, mnt);
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mntroot = nfs4_try_mount(flags, dev_name, data);
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kfree(data->client_address);
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kfree(data->nfs_server.export_path);
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goto out;
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@ -2333,7 +2336,7 @@ static int nfs_get_sb(struct file_system_type *fs_type,
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/* Get a volume representation */
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server = nfs_create_server(data, mntfh);
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if (IS_ERR(server)) {
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error = PTR_ERR(server);
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mntroot = ERR_CAST(server);
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goto out;
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}
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sb_mntdata.server = server;
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@ -2344,7 +2347,7 @@ static int nfs_get_sb(struct file_system_type *fs_type,
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/* Get a superblock - note that we may end up sharing one that already exists */
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s = sget(fs_type, compare_super, nfs_set_super, &sb_mntdata);
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if (IS_ERR(s)) {
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error = PTR_ERR(s);
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mntroot = ERR_CAST(s);
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goto out_err_nosb;
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}
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@ -2353,8 +2356,10 @@ static int nfs_get_sb(struct file_system_type *fs_type,
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server = NULL;
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} else {
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error = nfs_bdi_register(server);
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if (error)
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if (error) {
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mntroot = ERR_PTR(error);
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goto error_splat_bdi;
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}
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}
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if (!s->s_root) {
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@ -2365,19 +2370,14 @@ static int nfs_get_sb(struct file_system_type *fs_type,
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}
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mntroot = nfs_get_root(s, mntfh, dev_name);
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if (IS_ERR(mntroot)) {
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error = PTR_ERR(mntroot);
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if (IS_ERR(mntroot))
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goto error_splat_super;
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}
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error = security_sb_set_mnt_opts(s, &data->lsm_opts);
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if (error)
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goto error_splat_root;
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s->s_flags |= MS_ACTIVE;
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mnt->mnt_sb = s;
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mnt->mnt_root = mntroot;
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error = 0;
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out:
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kfree(data->nfs_server.hostname);
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@ -2387,7 +2387,7 @@ out:
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out_free_fh:
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nfs_free_fhandle(mntfh);
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kfree(data);
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return error;
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return mntroot;
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out_err_nosb:
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nfs_free_server(server);
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@ -2395,6 +2395,7 @@ out_err_nosb:
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error_splat_root:
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dput(mntroot);
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mntroot = ERR_PTR(error);
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error_splat_super:
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if (server && !s->s_root)
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bdi_unregister(&server->backing_dev_info);
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@ -2865,17 +2866,18 @@ static void nfs_referral_loop_unprotect(void)
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kfree(p);
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}
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static int nfs_follow_remote_path(struct vfsmount *root_mnt,
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const char *export_path, struct vfsmount *mnt_target)
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static struct dentry *nfs_follow_remote_path(struct vfsmount *root_mnt,
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const char *export_path)
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{
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struct nameidata *nd = NULL;
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struct mnt_namespace *ns_private;
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struct super_block *s;
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struct dentry *dentry;
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int ret;
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nd = kmalloc(sizeof(*nd), GFP_KERNEL);
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if (nd == NULL)
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return -ENOMEM;
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return ERR_PTR(-ENOMEM);
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ns_private = create_mnt_ns(root_mnt);
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ret = PTR_ERR(ns_private);
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@ -2897,29 +2899,27 @@ static int nfs_follow_remote_path(struct vfsmount *root_mnt,
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s = nd->path.mnt->mnt_sb;
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atomic_inc(&s->s_active);
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mnt_target->mnt_sb = s;
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mnt_target->mnt_root = dget(nd->path.dentry);
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dentry = dget(nd->path.dentry);
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path_put(&nd->path);
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kfree(nd);
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down_write(&s->s_umount);
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return 0;
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return dentry;
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out_put_mnt_ns:
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put_mnt_ns(ns_private);
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out_mntput:
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mntput(root_mnt);
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out_err:
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kfree(nd);
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return ret;
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return ERR_PTR(ret);
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}
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static int nfs4_try_mount(int flags, const char *dev_name,
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struct nfs_parsed_mount_data *data,
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struct vfsmount *mnt)
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static struct dentry *nfs4_try_mount(int flags, const char *dev_name,
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struct nfs_parsed_mount_data *data)
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{
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char *export_path;
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struct vfsmount *root_mnt;
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int error;
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struct dentry *res;
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dfprintk(MOUNT, "--> nfs4_try_mount()\n");
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@ -2929,26 +2929,25 @@ static int nfs4_try_mount(int flags, const char *dev_name,
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data->nfs_server.hostname);
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data->nfs_server.export_path = export_path;
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error = PTR_ERR(root_mnt);
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if (IS_ERR(root_mnt))
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goto out;
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res = ERR_CAST(root_mnt);
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if (!IS_ERR(root_mnt))
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res = nfs_follow_remote_path(root_mnt, export_path);
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error = nfs_follow_remote_path(root_mnt, export_path, mnt);
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out:
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dfprintk(MOUNT, "<-- nfs4_try_mount() = %d%s\n", error,
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error != 0 ? " [error]" : "");
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return error;
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dfprintk(MOUNT, "<-- nfs4_try_mount() = %ld%s\n",
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IS_ERR(res) ? PTR_ERR(res) : 0,
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IS_ERR(res) ? " [error]" : "");
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return res;
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}
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/*
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* Get the superblock for an NFS4 mountpoint
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*/
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static int nfs4_get_sb(struct file_system_type *fs_type,
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int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt)
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static struct dentry *nfs4_mount(struct file_system_type *fs_type,
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int flags, const char *dev_name, void *raw_data)
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{
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struct nfs_parsed_mount_data *data;
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int error = -ENOMEM;
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struct dentry *res = ERR_PTR(-ENOMEM);
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data = nfs_alloc_parsed_mount_data(4);
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if (data == NULL)
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@ -2956,10 +2955,14 @@ static int nfs4_get_sb(struct file_system_type *fs_type,
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/* Validate the mount data */
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error = nfs4_validate_mount_data(raw_data, data, dev_name);
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if (error < 0)
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if (error < 0) {
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res = ERR_PTR(error);
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goto out;
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}
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error = nfs4_try_mount(flags, dev_name, data, mnt);
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res = nfs4_try_mount(flags, dev_name, data);
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if (IS_ERR(res))
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error = PTR_ERR(res);
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out:
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kfree(data->client_address);
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@ -2968,9 +2971,9 @@ out:
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kfree(data->fscache_uniq);
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out_free_data:
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kfree(data);
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dprintk("<-- nfs4_get_sb() = %d%s\n", error,
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dprintk("<-- nfs4_mount() = %d%s\n", error,
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error != 0 ? " [error]" : "");
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return error;
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return res;
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}
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static void nfs4_kill_super(struct super_block *sb)
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@ -3164,16 +3167,15 @@ error_splat_bdi:
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/*
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* Create an NFS4 server record on referral traversal
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*/
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static int nfs4_referral_get_sb(struct file_system_type *fs_type,
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int flags, const char *dev_name, void *raw_data,
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struct vfsmount *mnt)
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static struct dentry *nfs4_referral_mount(struct file_system_type *fs_type,
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int flags, const char *dev_name, void *raw_data)
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{
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struct nfs_clone_mount *data = raw_data;
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char *export_path;
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struct vfsmount *root_mnt;
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int error;
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struct dentry *res;
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dprintk("--> nfs4_referral_get_sb()\n");
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dprintk("--> nfs4_referral_mount()\n");
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export_path = data->mnt_path;
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data->mnt_path = "/";
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@ -3182,15 +3184,13 @@ static int nfs4_referral_get_sb(struct file_system_type *fs_type,
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flags, data, data->hostname);
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data->mnt_path = export_path;
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error = PTR_ERR(root_mnt);
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if (IS_ERR(root_mnt))
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goto out;
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error = nfs_follow_remote_path(root_mnt, export_path, mnt);
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out:
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dprintk("<-- nfs4_referral_get_sb() = %d%s\n", error,
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error != 0 ? " [error]" : "");
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return error;
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res = ERR_CAST(root_mnt);
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if (!IS_ERR(root_mnt))
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res = nfs_follow_remote_path(root_mnt, export_path);
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dprintk("<-- nfs4_referral_mount() = %ld%s\n",
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IS_ERR(res) ? PTR_ERR(res) : 0,
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IS_ERR(res) ? " [error]" : "");
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return res;
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}
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#endif /* CONFIG_NFS_V4 */
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