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-rw-r--r--fs/nfs/super.c168
1 files changed, 102 insertions, 66 deletions
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index 30f939bcb72..b977748553d 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -107,12 +107,12 @@ struct rpc_program nfsacl_program = {
#endif /* CONFIG_NFS_V3_ACL */
static void nfs_umount_begin(struct vfsmount *, int);
-static int nfs_statfs(struct super_block *, struct kstatfs *);
+static int nfs_statfs(struct dentry *, struct kstatfs *);
static int nfs_show_options(struct seq_file *, struct vfsmount *);
static int nfs_show_stats(struct seq_file *, struct vfsmount *);
-static struct super_block *nfs_get_sb(struct file_system_type *, int, const char *, void *);
-static struct super_block *nfs_clone_nfs_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *raw_data);
+static int nfs_get_sb(struct file_system_type *, int, const char *, void *, struct vfsmount *);
+static int nfs_clone_nfs_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt);
static void nfs_kill_super(struct super_block *);
static struct file_system_type nfs_fs_type = {
@@ -143,12 +143,12 @@ static struct super_operations nfs_sops = {
};
#ifdef CONFIG_NFS_V4
-static struct super_block *nfs4_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *raw_data);
-static struct super_block *nfs_clone_nfs4_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *raw_data);
-static struct super_block *nfs_referral_nfs4_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *raw_data);
+static int nfs4_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt);
+static int nfs_clone_nfs4_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt);
+static int nfs_referral_nfs4_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt);
static void nfs4_kill_super(struct super_block *sb);
static struct file_system_type nfs4_fs_type = {
@@ -263,8 +263,9 @@ void __exit unregister_nfs_fs(void)
/*
* Deliver file system statistics to userspace
*/
-static int nfs_statfs(struct super_block *sb, struct kstatfs *buf)
+static int nfs_statfs(struct dentry *dentry, struct kstatfs *buf)
{
+ struct super_block *sb = dentry->d_sb;
struct nfs_server *server = NFS_SB(sb);
unsigned char blockbits;
unsigned long blockres;
@@ -770,15 +771,16 @@ out:
/*
* Copy an existing superblock and attach revised data
*/
-static struct super_block *nfs_clone_generic_sb(struct nfs_clone_mount *data,
+static int nfs_clone_generic_sb(struct nfs_clone_mount *data,
struct super_block *(*fill_sb)(struct nfs_server *, struct nfs_clone_mount *),
- struct nfs_server *(*fill_server)(struct super_block *, struct nfs_clone_mount *))
+ struct nfs_server *(*fill_server)(struct super_block *, struct nfs_clone_mount *),
+ struct vfsmount *mnt)
{
struct nfs_server *server;
struct nfs_server *parent = NFS_SB(data->sb);
struct super_block *sb = ERR_PTR(-EINVAL);
- void *err = ERR_PTR(-ENOMEM);
char *hostname;
+ int error = -ENOMEM;
int len;
server = kmalloc(sizeof(struct nfs_server), GFP_KERNEL);
@@ -791,21 +793,34 @@ static struct super_block *nfs_clone_generic_sb(struct nfs_clone_mount *data,
if (server->hostname == NULL)
goto free_server;
memcpy(server->hostname, hostname, len);
- if (rpciod_up() != 0)
+ error = rpciod_up();
+ if (error != 0)
goto free_hostname;
sb = fill_sb(server, data);
- if (IS_ERR((err = sb)) || sb->s_root)
+ if (IS_ERR(sb)) {
+ error = PTR_ERR(sb);
goto kill_rpciod;
+ }
+
+ if (sb->s_root)
+ goto out_rpciod_down;
server = fill_server(sb, data);
- if (IS_ERR((err = server)))
+ if (IS_ERR(server)) {
+ error = PTR_ERR(server);
goto out_deactivate;
- return sb;
+ }
+ return simple_set_mnt(mnt, sb);
out_deactivate:
up_write(&sb->s_umount);
deactivate_super(sb);
- return (struct super_block *)err;
+ return error;
+out_rpciod_down:
+ rpciod_down();
+ kfree(server->hostname);
+ kfree(server);
+ return simple_set_mnt(mnt, sb);
kill_rpciod:
rpciod_down();
free_hostname:
@@ -813,7 +828,7 @@ free_hostname:
free_server:
kfree(server);
out_err:
- return (struct super_block *)err;
+ return error;
}
/*
@@ -939,8 +954,8 @@ static int nfs_compare_super(struct super_block *sb, void *data)
return !nfs_compare_fh(&old->fh, &server->fh);
}
-static struct super_block *nfs_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *raw_data)
+static int nfs_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt)
{
int error;
struct nfs_server *server = NULL;
@@ -948,14 +963,14 @@ static struct super_block *nfs_get_sb(struct file_system_type *fs_type,
struct nfs_fh *root;
struct nfs_mount_data *data = raw_data;
- s = ERR_PTR(-EINVAL);
+ error = -EINVAL;
if (data == NULL) {
dprintk("%s: missing data argument\n", __FUNCTION__);
- goto out_err;
+ goto out_err_noserver;
}
if (data->version <= 0 || data->version > NFS_MOUNT_VERSION) {
dprintk("%s: bad mount version\n", __FUNCTION__);
- goto out_err;
+ goto out_err_noserver;
}
switch (data->version) {
case 1:
@@ -967,7 +982,7 @@ static struct super_block *nfs_get_sb(struct file_system_type *fs_type,
dprintk("%s: mount structure version %d does not support NFSv3\n",
__FUNCTION__,
data->version);
- goto out_err;
+ goto out_err_noserver;
}
data->root.size = NFS2_FHSIZE;
memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE);
@@ -976,24 +991,24 @@ static struct super_block *nfs_get_sb(struct file_system_type *fs_type,
dprintk("%s: mount structure version %d does not support strong security\n",
__FUNCTION__,
data->version);
- goto out_err;
+ goto out_err_noserver;
}
case 5:
memset(data->context, 0, sizeof(data->context));
}
#ifndef CONFIG_NFS_V3
/* If NFSv3 is not compiled in, return -EPROTONOSUPPORT */
- s = ERR_PTR(-EPROTONOSUPPORT);
+ error = -EPROTONOSUPPORT;
if (data->flags & NFS_MOUNT_VER3) {
dprintk("%s: NFSv3 not compiled into kernel\n", __FUNCTION__);
- goto out_err;
+ goto out_err_noserver;
}
#endif /* CONFIG_NFS_V3 */
- s = ERR_PTR(-ENOMEM);
+ error = -ENOMEM;
server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
if (!server)
- goto out_err;
+ goto out_err_noserver;
/* Zero out the NFS state stuff */
init_nfsv4_state(server);
server->client = server->client_sys = server->client_acl = ERR_PTR(-EINVAL);
@@ -1003,7 +1018,7 @@ static struct super_block *nfs_get_sb(struct file_system_type *fs_type,
root->size = data->root.size;
else
root->size = NFS2_FHSIZE;
- s = ERR_PTR(-EINVAL);
+ error = -EINVAL;
if (root->size > sizeof(root->data)) {
dprintk("%s: invalid root filehandle\n", __FUNCTION__);
goto out_err;
@@ -1019,15 +1034,20 @@ static struct super_block *nfs_get_sb(struct file_system_type *fs_type,
}
/* Fire up rpciod if not yet running */
- s = ERR_PTR(rpciod_up());
- if (IS_ERR(s)) {
- dprintk("%s: couldn't start rpciod! Error = %ld\n",
- __FUNCTION__, PTR_ERR(s));
+ error = rpciod_up();
+ if (error < 0) {
+ dprintk("%s: couldn't start rpciod! Error = %d\n",
+ __FUNCTION__, error);
goto out_err;
}
s = sget(fs_type, nfs_compare_super, nfs_set_super, server);
- if (IS_ERR(s) || s->s_root)
+ if (IS_ERR(s)) {
+ error = PTR_ERR(s);
+ goto out_err_rpciod;
+ }
+
+ if (s->s_root)
goto out_rpciod_down;
s->s_flags = flags;
@@ -1036,15 +1056,22 @@ static struct super_block *nfs_get_sb(struct file_system_type *fs_type,
if (error) {
up_write(&s->s_umount);
deactivate_super(s);
- return ERR_PTR(error);
+ return error;
}
s->s_flags |= MS_ACTIVE;
- return s;
+ return simple_set_mnt(mnt, s);
+
out_rpciod_down:
rpciod_down();
+ kfree(server);
+ return simple_set_mnt(mnt, s);
+
+out_err_rpciod:
+ rpciod_down();
out_err:
kfree(server);
- return s;
+out_err_noserver:
+ return error;
}
static void nfs_kill_super(struct super_block *s)
@@ -1083,11 +1110,11 @@ static struct super_block *nfs_clone_sb(struct nfs_server *server, struct nfs_cl
return sb;
}
-static struct super_block *nfs_clone_nfs_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *raw_data)
+static int nfs_clone_nfs_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt)
{
struct nfs_clone_mount *data = raw_data;
- return nfs_clone_generic_sb(data, nfs_clone_sb, nfs_clone_server);
+ return nfs_clone_generic_sb(data, nfs_clone_sb, nfs_clone_server, mnt);
}
#ifdef CONFIG_NFS_V4
@@ -1266,8 +1293,8 @@ nfs_copy_user_string(char *dst, struct nfs_string *src, int maxlen)
return dst;
}
-static struct super_block *nfs4_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *raw_data)
+static int nfs4_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt)
{
int error;
struct nfs_server *server;
@@ -1277,16 +1304,16 @@ static struct super_block *nfs4_get_sb(struct file_system_type *fs_type,
if (data == NULL) {
dprintk("%s: missing data argument\n", __FUNCTION__);
- return ERR_PTR(-EINVAL);
+ return -EINVAL;
}
if (data->version <= 0 || data->version > NFS4_MOUNT_VERSION) {
dprintk("%s: bad mount version\n", __FUNCTION__);
- return ERR_PTR(-EINVAL);
+ return -EINVAL;
}
server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
if (!server)
- return ERR_PTR(-ENOMEM);
+ return -ENOMEM;
/* Zero out the NFS state stuff */
init_nfsv4_state(server);
server->client = server->client_sys = server->client_acl = ERR_PTR(-EINVAL);
@@ -1308,33 +1335,42 @@ static struct super_block *nfs4_get_sb(struct file_system_type *fs_type,
/* We now require that the mount process passes the remote address */
if (data->host_addrlen != sizeof(server->addr)) {
- s = ERR_PTR(-EINVAL);
+ error = -EINVAL;
goto out_free;
}
if (copy_from_user(&server->addr, data->host_addr, sizeof(server->addr))) {
- s = ERR_PTR(-EFAULT);
+ error = -EFAULT;
goto out_free;
}
if (server->addr.sin_family != AF_INET ||
server->addr.sin_addr.s_addr == INADDR_ANY) {
dprintk("%s: mount program didn't pass remote IP address!\n",
__FUNCTION__);
- s = ERR_PTR(-EINVAL);
+ error = -EINVAL;
goto out_free;
}
/* Fire up rpciod if not yet running */
- s = ERR_PTR(rpciod_up());
- if (IS_ERR(s)) {
- dprintk("%s: couldn't start rpciod! Error = %ld\n",
- __FUNCTION__, PTR_ERR(s));
+ error = rpciod_up();
+ if (error < 0) {
+ dprintk("%s: couldn't start rpciod! Error = %d\n",
+ __FUNCTION__, error);
goto out_free;
}
s = sget(fs_type, nfs4_compare_super, nfs_set_super, server);
- if (IS_ERR(s) || s->s_root)
+ if (IS_ERR(s)) {
+ error = PTR_ERR(s);
goto out_free;
+ }
+
+ if (s->s_root) {
+ kfree(server->mnt_path);
+ kfree(server->hostname);
+ kfree(server);
+ return simple_set_mnt(mnt, s);
+ }
s->s_flags = flags;
@@ -1342,17 +1378,17 @@ static struct super_block *nfs4_get_sb(struct file_system_type *fs_type,
if (error) {
up_write(&s->s_umount);
deactivate_super(s);
- return ERR_PTR(error);
+ return error;
}
s->s_flags |= MS_ACTIVE;
- return s;
+ return simple_set_mnt(mnt, s);
out_err:
- s = (struct super_block *)p;
+ error = PTR_ERR(p);
out_free:
kfree(server->mnt_path);
kfree(server->hostname);
kfree(server);
- return s;
+ return error;
}
static void nfs4_kill_super(struct super_block *sb)
@@ -1430,11 +1466,11 @@ err:
return sb;
}
-static struct super_block *nfs_clone_nfs4_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *raw_data)
+static int nfs_clone_nfs4_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt)
{
struct nfs_clone_mount *data = raw_data;
- return nfs_clone_generic_sb(data, nfs4_clone_sb, nfs_clone_server);
+ return nfs_clone_generic_sb(data, nfs4_clone_sb, nfs_clone_server, mnt);
}
static struct super_block *nfs4_referral_sb(struct nfs_server *server, struct nfs_clone_mount *data)
@@ -1487,11 +1523,11 @@ out_err:
return (struct nfs_server *)err;
}
-static struct super_block *nfs_referral_nfs4_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *raw_data)
+static int nfs_referral_nfs4_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt)
{
struct nfs_clone_mount *data = raw_data;
- return nfs_clone_generic_sb(data, nfs4_referral_sb, nfs4_referral_server);
+ return nfs_clone_generic_sb(data, nfs4_referral_sb, nfs4_referral_server, mnt);
}
#endif
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-16 18:08:13 +0000