#include <linux/writeback.h> /* for the emergency remount stuff */
#include <linux/idr.h>
#include <linux/kobject.h>
+#include <linux/mutex.h>
#include <asm/uaccess.h>
*/
static struct super_block *alloc_super(void)
{
- struct super_block *s = kmalloc(sizeof(struct super_block), GFP_USER);
+ struct super_block *s = kzalloc(sizeof(struct super_block), GFP_USER);
static struct super_operations default_op;
if (s) {
- memset(s, 0, sizeof(struct super_block));
if (security_sb_alloc(s)) {
kfree(s);
s = NULL;
down_write(&s->s_umount);
s->s_count = S_BIAS;
atomic_set(&s->s_active, 1);
- sema_init(&s->s_vfs_rename_sem,1);
- sema_init(&s->s_dquot.dqio_sem, 1);
- sema_init(&s->s_dquot.dqonoff_sem, 1);
+ mutex_init(&s->s_vfs_rename_mutex);
+ mutex_init(&s->s_dquot.dqio_mutex);
+ mutex_init(&s->s_dquot.dqonoff_mutex);
init_rwsem(&s->s_dquot.dqptr_sem);
init_waitqueue_head(&s->s_wait_unfrozen);
s->s_maxbytes = MAX_NON_LFS;
if (root) {
sb->s_root = NULL;
shrink_dcache_parent(root);
- shrink_dcache_anon(&sb->s_anon);
+ shrink_dcache_sb(sb);
dput(root);
fsync_super(sb);
lock_super(sb);
/* Forget any remaining inodes */
if (invalidate_inodes(sb)) {
- printk("VFS: Busy inodes after unmount. "
- "Self-destruct in 5 seconds. Have a nice day...\n");
+ printk("VFS: Busy inodes after unmount of %s. "
+ "Self-destruct in 5 seconds. Have a nice day...\n",
+ sb->s_id);
}
unlock_kernel();
void sync_filesystems(int wait)
{
struct super_block *sb;
- static DECLARE_MUTEX(mutex);
+ static DEFINE_MUTEX(mutex);
- down(&mutex); /* Could be down_interruptible */
+ mutex_lock(&mutex); /* Could be down_interruptible */
spin_lock(&sb_lock);
list_for_each_entry(sb, &super_blocks, s_list) {
if (!sb->s_op->sync_fs)
goto restart;
}
spin_unlock(&sb_lock);
- up(&mutex);
+ mutex_unlock(&mutex);
}
/**
s = user_get_super(new_decode_dev(dev));
if (s == NULL)
goto out;
- err = vfs_statfs(s, &sbuf);
+ err = vfs_statfs(s->s_root, &sbuf);
drop_super(s);
if (err)
goto out;
return (void *)s->s_bdev == data;
}
-struct super_block *get_sb_bdev(struct file_system_type *fs_type,
+static void bdev_uevent(struct block_device *bdev, enum kobject_action action)
+{
+ if (bdev->bd_disk) {
+ if (bdev->bd_part)
+ kobject_uevent(&bdev->bd_part->kobj, action);
+ else
+ kobject_uevent(&bdev->bd_disk->kobj, action);
+ }
+}
+
+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
* will protect the lockfs code from trying to start a snapshot
* while we are mounting
*/
- down(&bdev->bd_mount_sem);
+ mutex_lock(&bdev->bd_mount_mutex);
s = sget(fs_type, test_bdev_super, set_bdev_super, bdev);
- up(&bdev->bd_mount_sem);
+ 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];
s->s_flags = flags;
strlcpy(s->s_id, bdevname(bdev, b), sizeof(s->s_id));
sb_set_blocksize(s, block_size(bdev));
- error = fill_super(s, data, flags & MS_VERBOSE ? 1 : 0);
+ error = fill_super(s, data, flags & MS_SILENT ? 1 : 0);
if (error) {
up_write(&s->s_umount);
deactivate_super(s);
- s = ERR_PTR(error);
- } else
- s->s_flags |= MS_ACTIVE;
+ 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);
{
struct block_device *bdev = sb->s_bdev;
+ bdev_uevent(bdev, KOBJ_UMOUNT);
generic_shutdown_super(sb);
sync_blockdev(bdev);
close_bdev_excl(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;
- error = fill_super(s, data, flags & MS_VERBOSE ? 1 : 0);
+ 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;
- 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_VERBOSE ? 1 : 0);
+ 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);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff