--------------------------- file_system_type ---------------------------
prototypes:
- struct super_block *(*get_sb) (struct file_system_type *, int,
- const char *, void *);
+ struct int (*get_sb) (struct file_system_type *, int,
+ const char *, void *, struct vfsmount *);
void (*kill_sb) (struct super_block *);
locking rules:
may block BKL
get_sb yes yes
kill_sb yes yes
-->get_sb() returns error or a locked superblock (exclusive on ->s_umount).
+->get_sb() returns error or 0 with locked superblock attached to the vfsmount
+(exclusive on ->s_umount).
->kill_sb() takes a write-locked superblock, does all shutdown work on it,
unlocks and drops the reference.
success and negative number in case of error (-EINVAL unless you have more
informative error value to report). Call it foo_fill_super(). Now declare
-struct super_block foo_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+int foo_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_bdev(fs_type, flags, dev_name, data, ext2_fill_super);
+ return get_sb_bdev(fs_type, flags, dev_name, data, foo_fill_super,
+ mnt);
}
(or similar with s/bdev/nodev/ or s/bdev/single/, depending on the kind of
struct file_system_type {
const char *name;
int fs_flags;
- struct super_block *(*get_sb) (struct file_system_type *, int,
- const char *, void *);
+ struct int (*get_sb) (struct file_system_type *, int,
+ const char *, void *, struct vfsmount *);
void (*kill_sb) (struct super_block *);
struct module *owner;
struct file_system_type * next;
}
-static struct super_block *
-pfmfs_get_sb(struct file_system_type *fs_type, int flags, const char *dev_name, void *data)
+static int
+pfmfs_get_sb(struct file_system_type *fs_type, int flags, const char *dev_name, void *data,
+ struct vfsmount *mnt)
{
- return get_sb_pseudo(fs_type, "pfm:", NULL, PFMFS_MAGIC);
+ return get_sb_pseudo(fs_type, "pfm:", NULL, PFMFS_MAGIC, mnt);
}
static struct file_system_type pfm_fs_type = {
return spufs_create_root(sb, data);
}
-static struct super_block *
+static int
spufs_get_sb(struct file_system_type *fstype, int flags,
- const char *name, void *data)
+ const char *name, void *data, struct vfsmount *mnt)
{
- return get_sb_single(fstype, flags, data, spufs_fill_super);
+ return get_sb_single(fstype, flags, data, spufs_fill_super, mnt);
}
static struct file_system_type spufs_type = {
kref_put(&uverbs_dev->ref, ib_uverbs_release_dev);
}
-static struct super_block *uverbs_event_get_sb(struct file_system_type *fs_type, int flags,
- const char *dev_name, void *data)
+static int uverbs_event_get_sb(struct file_system_type *fs_type, int flags,
+ const char *dev_name, void *data,
+ struct vfsmount *mnt)
{
return get_sb_pseudo(fs_type, "infinibandevent:", NULL,
- INFINIBANDEVENTFS_MAGIC);
+ INFINIBANDEVENTFS_MAGIC, mnt);
}
static struct file_system_type uverbs_event_fs = {
return ret;
}
-static struct super_block *ipathfs_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name,
- void *data)
+static int ipathfs_get_sb(struct file_system_type *fs_type, int flags,
+ const char *dev_name, void *data, struct vfsmount *mnt)
{
- ipath_super = get_sb_single(fs_type, flags, data,
- ipathfs_fill_super);
- return ipath_super;
+ int ret = get_sb_single(fs_type, flags, data,
+ ipathfs_fill_super, mnt);
+ if (ret >= 0)
+ ipath_super = mnt->mnt_sb;
+ return ret;
}
static void ipathfs_kill_super(struct super_block *s)
return -ENOMEM;
}
-static struct super_block *capifs_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int capifs_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_single(fs_type, flags, data, capifs_fill_super);
+ return get_sb_single(fs_type, flags, data, capifs_fill_super, mnt);
}
static struct file_system_type capifs_fs_type = {
static int ibmasmfs_fill_super (struct super_block *sb, void *data, int silent);
-static struct super_block *ibmasmfs_get_super(struct file_system_type *fst,
- int flags, const char *name, void *data)
+static int ibmasmfs_get_super(struct file_system_type *fst,
+ int flags, const char *name, void *data,
+ struct vfsmount *mnt)
{
- return get_sb_single(fst, flags, data, ibmasmfs_fill_super);
+ return get_sb_single(fst, flags, data, ibmasmfs_fill_super, mnt);
}
static struct super_operations ibmasmfs_s_ops = {
}
-static struct super_block *oprofilefs_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int oprofilefs_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_single(fs_type, flags, data, oprofilefs_fill_super);
+ return get_sb_single(fs_type, flags, data, oprofilefs_fill_super, mnt);
}
/* --------------------------------------------------------------------- */
-static struct super_block *usb_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int usb_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_single(fs_type, flags, data, usbfs_fill_super);
+ return get_sb_single(fs_type, flags, data, usbfs_fill_super, mnt);
}
static struct file_system_type usb_fs_type = {
}
/* "mount -t gadgetfs path /dev/gadget" ends up here */
-static struct super_block *
+static int
gadgetfs_get_sb (struct file_system_type *t, int flags,
- const char *path, void *opts)
+ const char *path, void *opts, struct vfsmount *mnt)
{
- return get_sb_single (t, flags, opts, gadgetfs_fill_super);
+ return get_sb_single (t, flags, opts, gadgetfs_fill_super, mnt);
}
static void
* @flags: mount flags
* @dev_name: device name that was mounted
* @data: mount options
+ * @mnt: mountpoint record to be instantiated
*
*/
-static struct super_block *v9fs_get_sb(struct file_system_type
- *fs_type, int flags,
- const char *dev_name, void *data)
+static int v9fs_get_sb(struct file_system_type *fs_type, int flags,
+ const char *dev_name, void *data,
+ struct vfsmount *mnt)
{
struct super_block *sb = NULL;
struct v9fs_fcall *fcall = NULL;
v9ses = kzalloc(sizeof(struct v9fs_session_info), GFP_KERNEL);
if (!v9ses)
- return ERR_PTR(-ENOMEM);
+ return -ENOMEM;
if ((newfid = v9fs_session_init(v9ses, dev_name, data)) < 0) {
dprintk(DEBUG_ERROR, "problem initiating session\n");
- sb = ERR_PTR(newfid);
+ retval = newfid;
goto out_free_session;
}
sb = sget(fs_type, NULL, v9fs_set_super, v9ses);
- if (IS_ERR(sb))
+ if (IS_ERR(sb)) {
+ retval = PTR_ERR(sb);
goto out_close_session;
+ }
v9fs_fill_super(sb, v9ses, flags);
inode = v9fs_get_inode(sb, S_IFDIR | mode);
goto put_back_sb;
}
- return sb;
+ return simple_set_mnt(mnt, sb);
out_close_session:
v9fs_session_close(v9ses);
out_free_session:
kfree(v9ses);
- return sb;
+ return retval;
put_back_sb:
/* deactivate_super calls v9fs_kill_super which will frees the rest */
up_write(&sb->s_umount);
deactivate_super(sb);
- return ERR_PTR(retval);
+ return retval;
}
/**
return -EINVAL;
}
-static struct super_block *adfs_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int adfs_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_bdev(fs_type, flags, dev_name, data, adfs_fill_super);
+ return get_sb_bdev(fs_type, flags, dev_name, data, adfs_fill_super,
+ mnt);
}
static struct file_system_type adfs_fs_type = {
return 0;
}
-static struct super_block *affs_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int affs_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_bdev(fs_type, flags, dev_name, data, affs_fill_super);
+ return get_sb_bdev(fs_type, flags, dev_name, data, affs_fill_super,
+ mnt);
}
static struct file_system_type affs_fs_type = {
static void afs_i_init_once(void *foo, kmem_cache_t *cachep,
unsigned long flags);
-static struct super_block *afs_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name,
- void *data);
+static int afs_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name,
+ void *data, struct vfsmount *mnt);
static struct inode *afs_alloc_inode(struct super_block *sb);
* get an AFS superblock
* - TODO: don't use get_sb_nodev(), but rather call sget() directly
*/
-static struct super_block *afs_get_sb(struct file_system_type *fs_type,
- int flags,
- const char *dev_name,
- void *options)
+static int afs_get_sb(struct file_system_type *fs_type,
+ int flags,
+ const char *dev_name,
+ void *options,
+ struct vfsmount *mnt)
{
struct afs_mount_params params;
struct super_block *sb;
ret = afscm_start();
if (ret < 0) {
_leave(" = %d", ret);
- return ERR_PTR(ret);
+ return ret;
}
/* parse the options */
goto error;
}
sb->s_flags |= MS_ACTIVE;
+ simple_set_mnt(mnt, sb);
afs_put_volume(params.volume);
afs_put_cell(params.default_cell);
- _leave(" = %p", sb);
- return sb;
+ _leave(" = 0 [%p]", 0, sb);
+ return 0;
error:
afs_put_volume(params.volume);
afs_put_cell(params.default_cell);
afscm_stop();
_leave(" = %d", ret);
- return ERR_PTR(ret);
+ return ret;
} /* end afs_get_sb() */
/*****************************************************************************/
#include <linux/init.h>
#include "autofs_i.h"
-static struct super_block *autofs_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int autofs_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_nodev(fs_type, flags, data, autofs_fill_super);
+ return get_sb_nodev(fs_type, flags, data, autofs_fill_super, mnt);
}
static struct file_system_type autofs_fs_type = {
#include <linux/init.h>
#include "autofs_i.h"
-static struct super_block *autofs_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int autofs_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_nodev(fs_type, flags, data, autofs4_fill_super);
+ return get_sb_nodev(fs_type, flags, data, autofs4_fill_super, mnt);
}
static struct file_system_type autofs_fs_type = {
return 0;
}
-static struct super_block *
+static int
befs_get_sb(struct file_system_type *fs_type, int flags, const char *dev_name,
- void *data)
+ void *data, struct vfsmount *mnt)
{
- return get_sb_bdev(fs_type, flags, dev_name, data, befs_fill_super);
+ return get_sb_bdev(fs_type, flags, dev_name, data, befs_fill_super,
+ mnt);
}
static struct file_system_type befs_fs_type = {
return -EINVAL;
}
-static struct super_block *bfs_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int bfs_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_bdev(fs_type, flags, dev_name, data, bfs_fill_super);
+ return get_sb_bdev(fs_type, flags, dev_name, data, bfs_fill_super, mnt);
}
static struct file_system_type bfs_fs_type = {
return err;
}
-static struct super_block *bm_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int bm_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_single(fs_type, flags, data, bm_fill_super);
+ return get_sb_single(fs_type, flags, data, bm_fill_super, mnt);
}
static struct linux_binfmt misc_format = {
.clear_inode = bdev_clear_inode,
};
-static struct super_block *bd_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int bd_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_pseudo(fs_type, "bdev:", &bdev_sops, 0x62646576);
+ return get_sb_pseudo(fs_type, "bdev:", &bdev_sops, 0x62646576, mnt);
}
static struct file_system_type bd_type = {
.remount_fs = cifs_remount,
};
-static struct super_block *
+static int
cifs_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
int rc;
struct super_block *sb = sget(fs_type, NULL, set_anon_super, NULL);
cFYI(1, ("Devname: %s flags: %d ", dev_name, flags));
if (IS_ERR(sb))
- return sb;
+ return PTR_ERR(sb);
sb->s_flags = flags;
if (rc) {
up_write(&sb->s_umount);
deactivate_super(sb);
- return ERR_PTR(rc);
+ return rc;
}
sb->s_flags |= MS_ACTIVE;
- return sb;
+ return simple_set_mnt(mnt, sb);
}
static ssize_t cifs_file_writev(struct file *file, const struct iovec *iov,
/* init_coda: used by filesystems.c to register coda */
-static struct super_block *coda_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int coda_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_nodev(fs_type, flags, data, coda_fill_super);
+ return get_sb_nodev(fs_type, flags, data, coda_fill_super, mnt);
}
struct file_system_type coda_fs_type = {
return 0;
}
-static struct super_block *configfs_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int configfs_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_single(fs_type, flags, data, configfs_fill_super);
+ return get_sb_single(fs_type, flags, data, configfs_fill_super, mnt);
}
static struct file_system_type configfs_fs_type = {
.statfs = cramfs_statfs,
};
-static struct super_block *cramfs_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int cramfs_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_bdev(fs_type, flags, dev_name, data, cramfs_fill_super);
+ return get_sb_bdev(fs_type, flags, dev_name, data, cramfs_fill_super,
+ mnt);
}
static struct file_system_type cramfs_fs_type = {
prune_dcache(found, parent->d_sb);
}
-/**
- * shrink_dcache_anon - further prune the cache
- * @head: head of d_hash list of dentries to prune
- *
- * Prune the dentries that are anonymous
- *
- * parsing d_hash list does not hlist_for_each_entry_rcu() as it
- * done under dcache_lock.
- *
- */
-void shrink_dcache_anon(struct super_block *sb)
-{
- struct hlist_node *lp;
- struct hlist_head *head = &sb->s_anon;
- int found;
- do {
- found = 0;
- spin_lock(&dcache_lock);
- hlist_for_each(lp, head) {
- struct dentry *this = hlist_entry(lp, struct dentry, d_hash);
- if (!list_empty(&this->d_lru)) {
- dentry_stat.nr_unused--;
- list_del_init(&this->d_lru);
- }
-
- /*
- * move only zero ref count dentries to the end
- * of the unused list for prune_dcache
- */
- if (!atomic_read(&this->d_count)) {
- list_add_tail(&this->d_lru, &dentry_unused);
- dentry_stat.nr_unused++;
- found++;
- }
- }
- spin_unlock(&dcache_lock);
- prune_dcache(found, sb);
- } while(found);
-}
-
/*
* Scan `nr' dentries and return the number which remain.
*
return simple_fill_super(sb, DEBUGFS_MAGIC, debug_files);
}
-static struct super_block *debug_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name,
- void *data)
+static int debug_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name,
+ void *data, struct vfsmount *mnt)
{
- return get_sb_single(fs_type, flags, data, debug_fill_super);
+ return get_sb_single(fs_type, flags, data, debug_fill_super, mnt);
}
static struct file_system_type debug_fs_type = {
return -EINVAL;
} /* End Function devfs_fill_super */
-static struct super_block *devfs_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name,
- void *data)
+static int devfs_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name,
+ void *data, struct vfsmount *mnt)
{
- return get_sb_single(fs_type, flags, data, devfs_fill_super);
+ return get_sb_single(fs_type, flags, data, devfs_fill_super, mnt);
}
static struct file_system_type devfs_fs_type = {
return -ENOMEM;
}
-static struct super_block *devpts_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int devpts_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_single(fs_type, flags, data, devpts_fill_super);
+ return get_sb_single(fs_type, flags, data, devpts_fill_super, mnt);
}
static struct file_system_type devpts_fs_type = {
static int efs_statfs(struct super_block *s, struct kstatfs *buf);
static int efs_fill_super(struct super_block *s, void *d, int silent);
-static struct super_block *efs_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int efs_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_bdev(fs_type, flags, dev_name, data, efs_fill_super);
+ return get_sb_bdev(fs_type, flags, dev_name, data, efs_fill_super, mnt);
}
static struct file_system_type efs_fs_type = {
int maxevents, long timeout);
static int eventpollfs_delete_dentry(struct dentry *dentry);
static struct inode *ep_eventpoll_inode(void);
-static struct super_block *eventpollfs_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name,
- void *data);
+static int eventpollfs_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name,
+ void *data, struct vfsmount *mnt);
/*
* This semaphore is used to serialize ep_free() and eventpoll_release_file().
}
-static struct super_block *
+static int
eventpollfs_get_sb(struct file_system_type *fs_type, int flags,
- const char *dev_name, void *data)
+ const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_pseudo(fs_type, "eventpoll:", NULL, EVENTPOLLFS_MAGIC);
+ return get_sb_pseudo(fs_type, "eventpoll:", NULL, EVENTPOLLFS_MAGIC,
+ mnt);
}
return 0;
}
-static struct super_block *ext2_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int ext2_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_bdev(fs_type, flags, dev_name, data, ext2_fill_super);
+ return get_sb_bdev(fs_type, flags, dev_name, data, ext2_fill_super, mnt);
}
#ifdef CONFIG_QUOTA
#endif
-static struct super_block *ext3_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int ext3_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_bdev(fs_type, flags, dev_name, data, ext3_fill_super);
+ return get_sb_bdev(fs_type, flags, dev_name, data, ext3_fill_super, mnt);
}
static struct file_system_type ext3_fs_type = {
/*
* The usual module blurb.
*/
-static struct super_block *vxfs_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int vxfs_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_bdev(fs_type, flags, dev_name, data, vxfs_fill_super);
+ return get_sb_bdev(fs_type, flags, dev_name, data, vxfs_fill_super,
+ mnt);
}
static struct file_system_type vxfs_fs_type = {
return err;
}
-static struct super_block *fuse_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name,
- void *raw_data)
+static int fuse_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name,
+ void *raw_data, struct vfsmount *mnt)
{
- return get_sb_nodev(fs_type, flags, raw_data, fuse_fill_super);
+ return get_sb_nodev(fs_type, flags, raw_data, fuse_fill_super, mnt);
}
static struct file_system_type fuse_fs_type = {
return res;
}
-static struct super_block *hfs_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int hfs_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data,
+ struct vfsmount *mnt)
{
- return get_sb_bdev(fs_type, flags, dev_name, data, hfs_fill_super);
+ return get_sb_bdev(fs_type, flags, dev_name, data, hfs_fill_super, mnt);
}
static struct file_system_type hfs_fs_type = {
#define HFSPLUS_INODE_SIZE sizeof(struct hfsplus_inode_info)
-static struct super_block *hfsplus_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int hfsplus_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data,
+ struct vfsmount *mnt)
{
- return get_sb_bdev(fs_type, flags, dev_name, data, hfsplus_fill_super);
+ return get_sb_bdev(fs_type, flags, dev_name, data, hfsplus_fill_super,
+ mnt);
}
static struct file_system_type hfsplus_fs_type = {
return(err);
}
-static struct super_block *hostfs_read_sb(struct file_system_type *type,
- int flags, const char *dev_name,
- void *data)
+static int hostfs_read_sb(struct file_system_type *type,
+ int flags, const char *dev_name,
+ void *data, struct vfsmount *mnt)
{
- return(get_sb_nodev(type, flags, data, hostfs_fill_sb_common));
+ return get_sb_nodev(type, flags, data, hostfs_fill_sb_common, mnt);
}
static struct file_system_type hostfs_type = {
return -EINVAL;
}
-static struct super_block *hpfs_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int hpfs_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_bdev(fs_type, flags, dev_name, data, hpfs_fill_super);
+ return get_sb_bdev(fs_type, flags, dev_name, data, hpfs_fill_super,
+ mnt);
}
static struct file_system_type hpfs_fs_type = {
return(err);
}
-static struct super_block *hppfs_read_super(struct file_system_type *type,
- int flags, const char *dev_name,
- void *data)
+static int hppfs_read_super(struct file_system_type *type,
+ int flags, const char *dev_name,
+ void *data, struct vfsmount *mnt)
{
- return(get_sb_nodev(type, flags, data, hppfs_fill_super));
+ return get_sb_nodev(type, flags, data, hppfs_fill_super, mnt);
}
static struct file_system_type hppfs_type = {
}
}
-static struct super_block *hugetlbfs_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int hugetlbfs_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_nodev(fs_type, flags, data, hugetlbfs_fill_super);
+ return get_sb_nodev(fs_type, flags, data, hugetlbfs_fill_super, mnt);
}
static struct file_system_type hugetlbfs_fs_type = {
return ret;
}
-static struct super_block *
+static int
inotify_get_sb(struct file_system_type *fs_type, int flags,
- const char *dev_name, void *data)
+ const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_pseudo(fs_type, "inotify", NULL, 0xBAD1DEA);
+ return get_sb_pseudo(fs_type, "inotify", NULL, 0xBAD1DEA, mnt);
}
static struct file_system_type inotify_fs_type = {
return inode;
}
-static struct super_block *isofs_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int isofs_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_bdev(fs_type, flags, dev_name, data, isofs_fill_super);
+ return get_sb_bdev(fs_type, flags, dev_name, data, isofs_fill_super,
+ mnt);
}
static struct file_system_type iso9660_fs_type = {
.remount_fs = jffs_remount,
};
-static struct super_block *jffs_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int jffs_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_bdev(fs_type, flags, dev_name, data, jffs_fill_super);
+ return get_sb_bdev(fs_type, flags, dev_name, data, jffs_fill_super,
+ mnt);
}
static struct file_system_type jffs_fs_type = {
return 0;
}
-static struct super_block *jffs2_get_sb_mtd(struct file_system_type *fs_type,
- int flags, const char *dev_name,
- void *data, struct mtd_info *mtd)
+static int jffs2_get_sb_mtd(struct file_system_type *fs_type,
+ int flags, const char *dev_name,
+ void *data, struct mtd_info *mtd,
+ struct vfsmount *mnt)
{
struct super_block *sb;
struct jffs2_sb_info *c;
c = kmalloc(sizeof(*c), GFP_KERNEL);
if (!c)
- return ERR_PTR(-ENOMEM);
+ return -ENOMEM;
memset(c, 0, sizeof(*c));
c->mtd = mtd;
sb = sget(fs_type, jffs2_sb_compare, jffs2_sb_set, c);
if (IS_ERR(sb))
- goto out_put;
+ goto out_error;
if (sb->s_root) {
/* New mountpoint for JFFS2 which is already mounted */
D1(printk(KERN_DEBUG "jffs2_get_sb_mtd(): Device %d (\"%s\") is already mounted\n",
mtd->index, mtd->name));
+ ret = simple_set_mnt(mnt, sb);
goto out_put;
}
/* Failure case... */
up_write(&sb->s_umount);
deactivate_super(sb);
- return ERR_PTR(ret);
+ return ret;
}
sb->s_flags |= MS_ACTIVE;
- return sb;
+ return simple_set_mnt(mnt, sb);
+out_error:
+ ret = PTR_ERR(sb);
out_put:
kfree(c);
put_mtd_device(mtd);
- return sb;
+ return ret;
}
-static struct super_block *jffs2_get_sb_mtdnr(struct file_system_type *fs_type,
- int flags, const char *dev_name,
- void *data, int mtdnr)
+static int jffs2_get_sb_mtdnr(struct file_system_type *fs_type,
+ int flags, const char *dev_name,
+ void *data, int mtdnr,
+ struct vfsmount *mnt)
{
struct mtd_info *mtd;
mtd = get_mtd_device(NULL, mtdnr);
if (!mtd) {
D1(printk(KERN_DEBUG "jffs2: MTD device #%u doesn't appear to exist\n", mtdnr));
- return ERR_PTR(-EINVAL);
+ return -EINVAL;
}
- return jffs2_get_sb_mtd(fs_type, flags, dev_name, data, mtd);
+ return jffs2_get_sb_mtd(fs_type, flags, dev_name, data, mtd, mnt);
}
-static struct super_block *jffs2_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name,
- void *data)
+static int jffs2_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name,
+ void *data, struct vfsmount *mnt)
{
int err;
struct nameidata nd;
int mtdnr;
if (!dev_name)
- return ERR_PTR(-EINVAL);
+ return -EINVAL;
D1(printk(KERN_DEBUG "jffs2_get_sb(): dev_name \"%s\"\n", dev_name));
mtd = get_mtd_device(NULL, mtdnr);
if (mtd) {
if (!strcmp(mtd->name, dev_name+4))
- return jffs2_get_sb_mtd(fs_type, flags, dev_name, data, mtd);
+ return jffs2_get_sb_mtd(fs_type, flags, dev_name, data, mtd, mnt);
put_mtd_device(mtd);
}
}
if (!*endptr) {
/* It was a valid number */
D1(printk(KERN_DEBUG "jffs2_get_sb(): mtd%%d, mtdnr %d\n", mtdnr));
- return jffs2_get_sb_mtdnr(fs_type, flags, dev_name, data, mtdnr);
+ return jffs2_get_sb_mtdnr(fs_type, flags, dev_name, data, mtdnr, mnt);
}
}
}
err, nd.dentry->d_inode));
if (err)
- return ERR_PTR(err);
+ return err;
err = -EINVAL;
mtdnr = iminor(nd.dentry->d_inode);
path_release(&nd);
- return jffs2_get_sb_mtdnr(fs_type, flags, dev_name, data, mtdnr);
+ return jffs2_get_sb_mtdnr(fs_type, flags, dev_name, data, mtdnr, mnt);
out:
path_release(&nd);
- return ERR_PTR(err);
+ return err;
}
static void jffs2_put_super (struct super_block *sb)
}
}
-static struct super_block *jfs_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int jfs_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_bdev(fs_type, flags, dev_name, data, jfs_fill_super);
+ return get_sb_bdev(fs_type, flags, dev_name, data, jfs_fill_super,
+ mnt);
}
static int jfs_sync_fs(struct super_block *sb, int wait)
* Common helper for pseudo-filesystems (sockfs, pipefs, bdev - stuff that
* will never be mountable)
*/
-struct super_block *
-get_sb_pseudo(struct file_system_type *fs_type, char *name,
- struct super_operations *ops, unsigned long magic)
+int get_sb_pseudo(struct file_system_type *fs_type, char *name,
+ struct super_operations *ops, unsigned long magic,
+ struct vfsmount *mnt)
{
struct super_block *s = sget(fs_type, NULL, set_anon_super, NULL);
static struct super_operations default_ops = {.statfs = simple_statfs};
struct qstr d_name = {.name = name, .len = strlen(name)};
if (IS_ERR(s))
- return s;
+ return PTR_ERR(s);
s->s_flags = MS_NOUSER;
s->s_maxbytes = ~0ULL;
d_instantiate(dentry, root);
s->s_root = dentry;
s->s_flags |= MS_ACTIVE;
- return s;
+ return simple_set_mnt(mnt, s);
Enomem:
up_write(&s->s_umount);
deactivate_super(s);
- return ERR_PTR(-ENOMEM);
+ return -ENOMEM;
}
int simple_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry)
V2_minix_truncate(inode);
}
-static struct super_block *minix_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int minix_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_bdev(fs_type, flags, dev_name, data, minix_fill_super);
+ return get_sb_bdev(fs_type, flags, dev_name, data, minix_fill_super,
+ mnt);
}
static struct file_system_type minix_fs_type = {
return 0;
}
-static struct super_block *msdos_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name,
- void *data)
+static int msdos_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name,
+ void *data, struct vfsmount *mnt)
{
- return get_sb_bdev(fs_type, flags, dev_name, data, msdos_fill_super);
+ return get_sb_bdev(fs_type, flags, dev_name, data, msdos_fill_super,
+ mnt);
}
static struct file_system_type msdos_fs_type = {
return mnt;
}
+int simple_set_mnt(struct vfsmount *mnt, struct super_block *sb)
+{
+ mnt->mnt_sb = sb;
+ mnt->mnt_root = dget(sb->s_root);
+ return 0;
+}
+
+EXPORT_SYMBOL(simple_set_mnt);
+
void free_vfsmnt(struct vfsmount *mnt)
{
kfree(mnt->mnt_devname);
return result;
}
-static struct super_block *ncp_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int ncp_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_nodev(fs_type, flags, data, ncp_fill_super);
+ return get_sb_nodev(fs_type, flags, data, ncp_fill_super, mnt);
}
static struct file_system_type ncp_fs_type = {
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;
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:
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);
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);
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;
}
/* 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;
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)
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;
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);
/* 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;
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)
return simple_fill_super(sb, 0x6e667364, nfsd_files);
}
-static struct super_block *nfsd_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int nfsd_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_single(fs_type, flags, data, nfsd_fill_super);
+ return get_sb_single(fs_type, flags, data, nfsd_fill_super, mnt);
}
static struct file_system_type nfsd_fs_type = {
/* Driver wide mutex. */
DEFINE_MUTEX(ntfs_lock);
-static struct super_block *ntfs_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int ntfs_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_bdev(fs_type, flags, dev_name, data, ntfs_fill_super);
+ return get_sb_bdev(fs_type, flags, dev_name, data, ntfs_fill_super,
+ mnt);
}
static struct file_system_type ntfs_fs_type = {
.getattr = simple_getattr,
};
-static struct super_block *dlmfs_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int dlmfs_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_nodev(fs_type, flags, data, dlmfs_fill_super);
+ return get_sb_nodev(fs_type, flags, data, dlmfs_fill_super, mnt);
}
static struct file_system_type dlmfs_fs_type = {
return status;
}
-static struct super_block *ocfs2_get_sb(struct file_system_type *fs_type,
- int flags,
- const char *dev_name,
- void *data)
+static int ocfs2_get_sb(struct file_system_type *fs_type,
+ int flags,
+ const char *dev_name,
+ void *data,
+ struct vfsmount *mnt)
{
- return get_sb_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super);
+ return get_sb_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super,
+ mnt);
}
static struct file_system_type ocfs2_fs_type = {
return -ENOMEM;
}
-static struct super_block *openprom_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int openprom_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_single(fs_type, flags, data, openprom_fill_super);
+ return get_sb_single(fs_type, flags, data, openprom_fill_super, mnt);
}
static struct file_system_type openprom_fs_type = {
* any operations on the root directory. However, we need a non-trivial
* d_name - pipe: will go nicely and kill the special-casing in procfs.
*/
-
-static struct super_block *
-pipefs_get_sb(struct file_system_type *fs_type, int flags,
- const char *dev_name, void *data)
+static int pipefs_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data,
+ struct vfsmount *mnt)
{
- return get_sb_pseudo(fs_type, "pipe:", NULL, PIPEFS_MAGIC);
+ return get_sb_pseudo(fs_type, "pipe:", NULL, PIPEFS_MAGIC, mnt);
}
static struct file_system_type pipe_fs_type = {
struct proc_dir_entry *proc_sys_root;
#endif
-static struct super_block *proc_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int proc_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_single(fs_type, flags, data, proc_fill_super);
+ return get_sb_single(fs_type, flags, data, proc_fill_super, mnt);
}
static struct file_system_type proc_fs_type = {
"qnx4_inode_cache: not all structures were freed\n");
}
-static struct super_block *qnx4_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int qnx4_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_bdev(fs_type, flags, dev_name, data, qnx4_fill_super);
+ return get_sb_bdev(fs_type, flags, dev_name, data, qnx4_fill_super,
+ mnt);
}
static struct file_system_type qnx4_fs_type = {
return 0;
}
-struct super_block *ramfs_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+int ramfs_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_nodev(fs_type, flags, data, ramfs_fill_super);
+ return get_sb_nodev(fs_type, flags, data, ramfs_fill_super, mnt);
}
-static struct super_block *rootfs_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int rootfs_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_nodev(fs_type, flags|MS_NOUSER, data, ramfs_fill_super);
+ return get_sb_nodev(fs_type, flags|MS_NOUSER, data, ramfs_fill_super,
+ mnt);
}
static struct file_system_type ramfs_fs_type = {
#endif
-static struct super_block *get_super_block(struct file_system_type *fs_type,
- int flags, const char *dev_name,
- void *data)
+static int get_super_block(struct file_system_type *fs_type,
+ int flags, const char *dev_name,
+ void *data, struct vfsmount *mnt)
{
- return get_sb_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super);
+ return get_sb_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super,
+ mnt);
}
static int __init init_reiserfs_fs(void)
.remount_fs = romfs_remount,
};
-static struct super_block *romfs_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int romfs_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_bdev(fs_type, flags, dev_name, data, romfs_fill_super);
+ return get_sb_bdev(fs_type, flags, dev_name, data, romfs_fill_super,
+ mnt);
}
static struct file_system_type romfs_fs_type = {
return error;
}
-static struct super_block *smb_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int smb_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_nodev(fs_type, flags, data, smb_fill_super);
+ return get_sb_nodev(fs_type, flags, data, smb_fill_super, mnt);
}
static struct file_system_type smb_fs_type = {
if (root) {
sb->s_root = NULL;
shrink_dcache_parent(root);
- shrink_dcache_anon(sb);
+ shrink_dcache_sb(sb);
dput(root);
fsync_super(sb);
lock_super(sb);
}
}
-struct super_block *get_sb_bdev(struct file_system_type *fs_type,
+int get_sb_bdev(struct file_system_type *fs_type,
int flags, const char *dev_name, void *data,
- int (*fill_super)(struct super_block *, void *, int))
+ int (*fill_super)(struct super_block *, void *, int),
+ struct vfsmount *mnt)
{
struct block_device *bdev;
struct super_block *s;
bdev = open_bdev_excl(dev_name, flags, fs_type);
if (IS_ERR(bdev))
- return (struct super_block *)bdev;
+ return PTR_ERR(bdev);
/*
* once the super is inserted into the list by sget, s_umount
s = sget(fs_type, test_bdev_super, set_bdev_super, bdev);
mutex_unlock(&bdev->bd_mount_mutex);
if (IS_ERR(s))
- goto out;
+ goto error_s;
if (s->s_root) {
if ((flags ^ s->s_flags) & MS_RDONLY) {
up_write(&s->s_umount);
deactivate_super(s);
- s = ERR_PTR(-EBUSY);
+ error = -EBUSY;
+ goto error_bdev;
}
- goto out;
+
+ close_bdev_excl(bdev);
} else {
char b[BDEVNAME_SIZE];
if (error) {
up_write(&s->s_umount);
deactivate_super(s);
- s = ERR_PTR(error);
- } else {
- s->s_flags |= MS_ACTIVE;
- bdev_uevent(bdev, KOBJ_MOUNT);
+ goto error;
}
+
+ s->s_flags |= MS_ACTIVE;
+ bdev_uevent(bdev, KOBJ_MOUNT);
}
- return s;
+ return simple_set_mnt(mnt, s);
-out:
+error_s:
+ error = PTR_ERR(s);
+error_bdev:
close_bdev_excl(bdev);
- return s;
+error:
+ return error;
}
EXPORT_SYMBOL(get_sb_bdev);
EXPORT_SYMBOL(kill_block_super);
-struct super_block *get_sb_nodev(struct file_system_type *fs_type,
+int get_sb_nodev(struct file_system_type *fs_type,
int flags, void *data,
- int (*fill_super)(struct super_block *, void *, int))
+ int (*fill_super)(struct super_block *, void *, int),
+ struct vfsmount *mnt)
{
int error;
struct super_block *s = sget(fs_type, NULL, set_anon_super, NULL);
if (IS_ERR(s))
- return s;
+ return PTR_ERR(s);
s->s_flags = flags;
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);
}
EXPORT_SYMBOL(get_sb_nodev);
return 1;
}
-struct super_block *get_sb_single(struct file_system_type *fs_type,
+int get_sb_single(struct file_system_type *fs_type,
int flags, void *data,
- int (*fill_super)(struct super_block *, void *, int))
+ int (*fill_super)(struct super_block *, void *, int),
+ struct vfsmount *mnt)
{
struct super_block *s;
int error;
s = sget(fs_type, compare_single, set_anon_super, NULL);
if (IS_ERR(s))
- return s;
+ return PTR_ERR(s);
if (!s->s_root) {
s->s_flags = flags;
error = fill_super(s, data, flags & MS_SILENT ? 1 : 0);
if (error) {
up_write(&s->s_umount);
deactivate_super(s);
- return ERR_PTR(error);
+ return error;
}
s->s_flags |= MS_ACTIVE;
}
do_remount_sb(s, flags, data, 0);
- return s;
+ return simple_set_mnt(mnt, s);
}
EXPORT_SYMBOL(get_sb_single);
struct vfsmount *
-do_kern_mount(const char *fstype, int flags, const char *name, void *data)
+vfs_kern_mount(struct file_system_type *type, int flags, const char *name, void *data)
{
- struct file_system_type *type = get_fs_type(fstype);
- struct super_block *sb = ERR_PTR(-ENOMEM);
struct vfsmount *mnt;
- int error;
char *secdata = NULL;
+ int error;
if (!type)
return ERR_PTR(-ENODEV);
+ error = -ENOMEM;
mnt = alloc_vfsmnt(name);
if (!mnt)
goto out;
if (data) {
secdata = alloc_secdata();
- if (!secdata) {
- sb = ERR_PTR(-ENOMEM);
+ if (!secdata)
goto out_mnt;
- }
error = security_sb_copy_data(type, data, secdata);
- if (error) {
- sb = ERR_PTR(error);
+ if (error)
goto out_free_secdata;
- }
}
- sb = type->get_sb(type, flags, name, data);
- if (IS_ERR(sb))
+ error = type->get_sb(type, flags, name, data, mnt);
+ if (error < 0)
goto out_free_secdata;
- error = security_sb_kern_mount(sb, secdata);
+
+ error = security_sb_kern_mount(mnt->mnt_sb, secdata);
if (error)
goto out_sb;
- mnt->mnt_sb = sb;
- mnt->mnt_root = dget(sb->s_root);
- mnt->mnt_mountpoint = sb->s_root;
+
+ mnt->mnt_mountpoint = mnt->mnt_root;
mnt->mnt_parent = mnt;
- up_write(&sb->s_umount);
+ up_write(&mnt->mnt_sb->s_umount);
free_secdata(secdata);
- put_filesystem(type);
return mnt;
out_sb:
- up_write(&sb->s_umount);
- deactivate_super(sb);
- sb = ERR_PTR(error);
+ dput(mnt->mnt_root);
+ up_write(&mnt->mnt_sb->s_umount);
+ deactivate_super(mnt->mnt_sb);
out_free_secdata:
free_secdata(secdata);
out_mnt:
free_vfsmnt(mnt);
out:
+ return ERR_PTR(error);
+}
+
+EXPORT_SYMBOL_GPL(vfs_kern_mount);
+
+struct vfsmount *
+do_kern_mount(const char *fstype, int flags, const char *name, void *data)
+{
+ struct file_system_type *type = get_fs_type(fstype);
+ struct vfsmount *mnt;
+ if (!type)
+ return ERR_PTR(-ENODEV);
+ mnt = vfs_kern_mount(type, flags, name, data);
put_filesystem(type);
- return (struct vfsmount *)sb;
+ return mnt;
}
EXPORT_SYMBOL_GPL(do_kern_mount);
struct vfsmount *kern_mount(struct file_system_type *type)
{
- return do_kern_mount(type->name, 0, type->name, NULL);
+ return vfs_kern_mount(type, 0, type->name, NULL);
}
EXPORT_SYMBOL(kern_mount);
return 0;
}
-static struct super_block *sysfs_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int sysfs_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_single(fs_type, flags, data, sysfs_fill_super);
+ return get_sb_single(fs_type, flags, data, sysfs_fill_super, mnt);
}
static struct file_system_type sysfs_fs_type = {
/* Every kernel module contains stuff like this. */
-static struct super_block *sysv_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int sysv_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_bdev(fs_type, flags, dev_name, data, sysv_fill_super);
+ return get_sb_bdev(fs_type, flags, dev_name, data, sysv_fill_super,
+ mnt);
}
-static struct super_block *v7_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int v7_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_bdev(fs_type, flags, dev_name, data, v7_fill_super);
+ return get_sb_bdev(fs_type, flags, dev_name, data, v7_fill_super, mnt);
}
static struct file_system_type sysv_fs_type = {
static int udf_statfs(struct super_block *, struct kstatfs *);
/* UDF filesystem type */
-static struct super_block *udf_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int udf_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_bdev(fs_type, flags, dev_name, data, udf_fill_super);
+ return get_sb_bdev(fs_type, flags, dev_name, data, udf_fill_super, mnt);
}
static struct file_system_type udf_fstype = {
#endif
-static struct super_block *ufs_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int ufs_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super);
+ return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super, mnt);
}
static struct file_system_type ufs_fs_type = {
return 0;
}
-static struct super_block *vfat_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name,
- void *data)
+static int vfat_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name,
+ void *data, struct vfsmount *mnt)
{
- return get_sb_bdev(fs_type, flags, dev_name, data, vfat_fill_super);
+ return get_sb_bdev(fs_type, flags, dev_name, data, vfat_fill_super,
+ mnt);
}
static struct file_system_type vfat_fs_type = {
return -error;
}
-STATIC struct super_block *
+STATIC int
xfs_fs_get_sb(
struct file_system_type *fs_type,
int flags,
const char *dev_name,
- void *data)
+ void *data,
+ struct vfsmount *mnt)
{
- return get_sb_bdev(fs_type, flags, dev_name, data, xfs_fs_fill_super);
+ return get_sb_bdev(fs_type, flags, dev_name, data, xfs_fs_fill_super,
+ mnt);
}
STATIC struct super_operations xfs_super_operations = {
extern struct dentry * d_splice_alias(struct inode *, struct dentry *);
extern void shrink_dcache_sb(struct super_block *);
extern void shrink_dcache_parent(struct dentry *);
-extern void shrink_dcache_anon(struct super_block *);
extern int d_invalidate(struct dentry *);
/* only used at mount-time */
struct file_system_type {
const char *name;
int fs_flags;
- struct super_block *(*get_sb) (struct file_system_type *, int,
- const char *, void *);
+ int (*get_sb) (struct file_system_type *, int,
+ const char *, void *, struct vfsmount *);
void (*kill_sb) (struct super_block *);
struct module *owner;
struct file_system_type * next;
struct list_head fs_supers;
};
-struct super_block *get_sb_bdev(struct file_system_type *fs_type,
+extern int get_sb_bdev(struct file_system_type *fs_type,
int flags, const char *dev_name, void *data,
- int (*fill_super)(struct super_block *, void *, int));
-struct super_block *get_sb_single(struct file_system_type *fs_type,
+ int (*fill_super)(struct super_block *, void *, int),
+ struct vfsmount *mnt);
+extern int get_sb_single(struct file_system_type *fs_type,
int flags, void *data,
- int (*fill_super)(struct super_block *, void *, int));
-struct super_block *get_sb_nodev(struct file_system_type *fs_type,
+ int (*fill_super)(struct super_block *, void *, int),
+ struct vfsmount *mnt);
+extern int get_sb_nodev(struct file_system_type *fs_type,
int flags, void *data,
- int (*fill_super)(struct super_block *, void *, int));
+ int (*fill_super)(struct super_block *, void *, int),
+ struct vfsmount *mnt);
void generic_shutdown_super(struct super_block *sb);
void kill_block_super(struct super_block *sb);
void kill_anon_super(struct super_block *sb);
int (*test)(struct super_block *,void *),
int (*set)(struct super_block *,void *),
void *data);
-struct super_block *get_sb_pseudo(struct file_system_type *, char *,
- struct super_operations *ops, unsigned long);
+extern int get_sb_pseudo(struct file_system_type *, char *,
+ struct super_operations *ops, unsigned long,
+ struct vfsmount *mnt);
+extern int simple_set_mnt(struct vfsmount *mnt, struct super_block *sb);
int __put_super(struct super_block *sb);
int __put_super_and_need_restart(struct super_block *sb);
void unnamed_dev_init(void);
#define _LINUX_RAMFS_H
struct inode *ramfs_get_inode(struct super_block *sb, int mode, dev_t dev);
-struct super_block *ramfs_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data);
+extern int ramfs_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt);
#ifndef CONFIG_MMU
extern unsigned long ramfs_nommu_get_unmapped_area(struct file *file,
return 0;
}
-static struct super_block *mqueue_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name,
- void *data)
+static int mqueue_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name,
+ void *data, struct vfsmount *mnt)
{
- return get_sb_single(fs_type, flags, data, mqueue_fill_super);
+ return get_sb_single(fs_type, flags, data, mqueue_fill_super, mnt);
}
static void init_once(void *foo, kmem_cache_t * cachep, unsigned long flags)
return 0;
}
-static struct super_block *cpuset_get_sb(struct file_system_type *fs_type,
- int flags, const char *unused_dev_name,
- void *data)
+static int cpuset_get_sb(struct file_system_type *fs_type,
+ int flags, const char *unused_dev_name,
+ void *data, struct vfsmount *mnt)
{
- return get_sb_single(fs_type, flags, data, cpuset_fill_super);
+ return get_sb_single(fs_type, flags, data, cpuset_fill_super, mnt);
}
static struct file_system_type cpuset_fs_type = {
(unsigned long)uaddr2, val2, val3);
}
-static struct super_block *
-futexfs_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int futexfs_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data,
+ struct vfsmount *mnt)
{
- return get_sb_pseudo(fs_type, "futex", NULL, 0xBAD1DEA);
+ return get_sb_pseudo(fs_type, "futex", NULL, 0xBAD1DEA, mnt);
}
static struct file_system_type futex_fs_type = {
};
-static struct super_block *shmem_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int shmem_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_nodev(fs_type, flags, data, shmem_fill_super);
+ return get_sb_nodev(fs_type, flags, data, shmem_fill_super, mnt);
}
static struct file_system_type tmpfs_fs_type = {
.statfs = simple_statfs,
};
-static struct super_block *sockfs_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int sockfs_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_pseudo(fs_type, "socket:", &sockfs_ops, SOCKFS_MAGIC);
+ return get_sb_pseudo(fs_type, "socket:", &sockfs_ops, SOCKFS_MAGIC,
+ mnt);
}
static struct vfsmount *sock_mnt __read_mostly;
return -ENOMEM;
}
-static struct super_block *
+static int
rpc_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_single(fs_type, flags, data, rpc_fill_super);
+ return get_sb_single(fs_type, flags, data, rpc_fill_super, mnt);
}
static struct file_system_type rpc_pipe_fs_type = {
return simple_fill_super(sb, SECURITYFS_MAGIC, files);
}
-static struct super_block *get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name,
- void *data)
+static int get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name,
+ void *data, struct vfsmount *mnt)
{
- return get_sb_single(fs_type, flags, data, fill_super);
+ return get_sb_single(fs_type, flags, data, fill_super, mnt);
}
static struct file_system_type fs_type = {
goto out;
}
-static struct super_block *sel_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int sel_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data,
+ struct vfsmount *mnt)
{
- return get_sb_single(fs_type, flags, data, sel_fill_super);
+ return get_sb_single(fs_type, flags, data, sel_fill_super, mnt);
}
static struct file_system_type sel_fs_type = {
projects / GitHub / exynos8895 / android_kernel_samsung_universal8895.git / commitdiff