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Merge git://git.kernel.org/pub/scm/linux/kernel/git/viro/bdev

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* git://git.kernel.org/pub/scm/linux/kernel/git/viro/bdev: (66 commits)
  [PATCH] kill the rest of struct file propagation in block ioctls
  [PATCH] get rid of struct file use in blkdev_ioctl() BLKBSZSET
  [PATCH] get rid of blkdev_locked_ioctl()
  [PATCH] get rid of blkdev_driver_ioctl()
  [PATCH] sanitize blkdev_get() and friends
  [PATCH] remember mode of reiserfs journal
  [PATCH] propagate mode through swsusp_close()
  [PATCH] propagate mode through open_bdev_excl/close_bdev_excl
  [PATCH] pass fmode_t to blkdev_put()
  [PATCH] kill the unused bsize on the send side of /dev/loop
  [PATCH] trim file propagation in block/compat_ioctl.c
  [PATCH] end of methods switch: remove the old ones
  [PATCH] switch sr
  [PATCH] switch sd
  [PATCH] switch ide-scsi
  [PATCH] switch tape_block
  [PATCH] switch dcssblk
  [PATCH] switch dasd
  [PATCH] switch mtd_blkdevs
  [PATCH] switch mmc
  ...
This commit is contained in:
Linus Torvalds
2008-10-23 10:23:07 -07:00
parent 5ed487bc2c 56b26add02
commit 2248485640
107 changed files with 868 additions and 1002 deletions
Download Patch File Download Diff File Expand all files Collapse all files

111
fs/block_dev.c
View File

@@ -840,13 +840,12 @@ EXPORT_SYMBOL_GPL(bd_release_from_disk);
* to be used for internal purposes. If you ever need it - reconsider
* your API.
*/
struct block_device *open_by_devnum(dev_t dev, unsigned mode)
struct block_device *open_by_devnum(dev_t dev, fmode_t mode)
{
struct block_device *bdev = bdget(dev);
int err = -ENOMEM;
int flags = mode & FMODE_WRITE ? O_RDWR : O_RDONLY;
if (bdev)
err = blkdev_get(bdev, mode, flags);
err = blkdev_get(bdev, mode);
return err ? ERR_PTR(err) : bdev;
}
@@ -975,9 +974,7 @@ void bd_set_size(struct block_device *bdev, loff_t size)
}
EXPORT_SYMBOL(bd_set_size);
static int __blkdev_get(struct block_device *bdev, mode_t mode, unsigned flags,
int for_part);
static int __blkdev_put(struct block_device *bdev, int for_part);
static int __blkdev_put(struct block_device *bdev, fmode_t mode, int for_part);
/*
* bd_mutex locking:
@@ -986,7 +983,7 @@ static int __blkdev_put(struct block_device *bdev, int for_part);
* mutex_lock_nested(whole->bd_mutex, 1)
*/
static int do_open(struct block_device *bdev, struct file *file, int for_part)
static int __blkdev_get(struct block_device *bdev, fmode_t mode, int for_part)
{
struct gendisk *disk;
struct hd_struct *part = NULL;
@@ -994,9 +991,9 @@ static int do_open(struct block_device *bdev, struct file *file, int for_part)
int partno;
int perm = 0;
if (file->f_mode & FMODE_READ)
if (mode & FMODE_READ)
perm |= MAY_READ;
if (file->f_mode & FMODE_WRITE)
if (mode & FMODE_WRITE)
perm |= MAY_WRITE;
/*
* hooks: /n/, see "layering violations".
@@ -1008,7 +1005,6 @@ static int do_open(struct block_device *bdev, struct file *file, int for_part)
}
ret = -ENXIO;
file->f_mapping = bdev->bd_inode->i_mapping;
lock_kernel();
@@ -1027,7 +1023,7 @@ static int do_open(struct block_device *bdev, struct file *file, int for_part)
if (!partno) {
struct backing_dev_info *bdi;
if (disk->fops->open) {
ret = disk->fops->open(bdev->bd_inode, file);
ret = disk->fops->open(bdev, mode);
if (ret)
goto out_clear;
}
@@ -1047,7 +1043,7 @@ static int do_open(struct block_device *bdev, struct file *file, int for_part)
if (!whole)
goto out_clear;
BUG_ON(for_part);
ret = __blkdev_get(whole, file->f_mode, file->f_flags, 1);
ret = __blkdev_get(whole, mode, 1);
if (ret)
goto out_clear;
bdev->bd_contains = whole;
@@ -1068,7 +1064,7 @@ static int do_open(struct block_device *bdev, struct file *file, int for_part)
disk = NULL;
if (bdev->bd_contains == bdev) {
if (bdev->bd_disk->fops->open) {
ret = bdev->bd_disk->fops->open(bdev->bd_inode, file);
ret = bdev->bd_disk->fops->open(bdev, mode);
if (ret)
goto out_unlock_bdev;
}
@@ -1088,7 +1084,7 @@ static int do_open(struct block_device *bdev, struct file *file, int for_part)
bdev->bd_part = NULL;
bdev->bd_inode->i_data.backing_dev_info = &default_backing_dev_info;
if (bdev != bdev->bd_contains)
__blkdev_put(bdev->bd_contains, 1);
__blkdev_put(bdev->bd_contains, mode, 1);
bdev->bd_contains = NULL;
out_unlock_bdev:
mutex_unlock(&bdev->bd_mutex);
@@ -1104,28 +1100,9 @@ static int do_open(struct block_device *bdev, struct file *file, int for_part)
return ret;
}
static int __blkdev_get(struct block_device *bdev, mode_t mode, unsigned flags,
int for_part)
int blkdev_get(struct block_device *bdev, fmode_t mode)
{
/*
* This crockload is due to bad choice of ->open() type.
* It will go away.
* For now, block device ->open() routine must _not_
* examine anything in 'inode' argument except ->i_rdev.
*/
struct file fake_file = {};
struct dentry fake_dentry = {};
fake_file.f_mode = mode;
fake_file.f_flags = flags;
fake_file.f_path.dentry = &fake_dentry;
fake_dentry.d_inode = bdev->bd_inode;
return do_open(bdev, &fake_file, for_part);
}
int blkdev_get(struct block_device *bdev, mode_t mode, unsigned flags)
{
return __blkdev_get(bdev, mode, flags, 0);
return __blkdev_get(bdev, mode, 0);
}
EXPORT_SYMBOL(blkdev_get);
@@ -1142,28 +1119,36 @@ static int blkdev_open(struct inode * inode, struct file * filp)
*/
filp->f_flags |= O_LARGEFILE;
if (filp->f_flags & O_NDELAY)
filp->f_mode |= FMODE_NDELAY;
if (filp->f_flags & O_EXCL)
filp->f_mode |= FMODE_EXCL;
if ((filp->f_flags & O_ACCMODE) == 3)
filp->f_mode |= FMODE_WRITE_IOCTL;
bdev = bd_acquire(inode);
if (bdev == NULL)
return -ENOMEM;
res = do_open(bdev, filp, 0);
filp->f_mapping = bdev->bd_inode->i_mapping;
res = blkdev_get(bdev, filp->f_mode);
if (res)
return res;
if (!(filp->f_flags & O_EXCL) )
if (!(filp->f_mode & FMODE_EXCL))
return 0;
if (!(res = bd_claim(bdev, filp)))
return 0;
blkdev_put(bdev);
blkdev_put(bdev, filp->f_mode);
return res;
}
static int __blkdev_put(struct block_device *bdev, int for_part)
static int __blkdev_put(struct block_device *bdev, fmode_t mode, int for_part)
{
int ret = 0;
struct inode *bd_inode = bdev->bd_inode;
struct gendisk *disk = bdev->bd_disk;
struct block_device *victim = NULL;
@@ -1178,7 +1163,7 @@ static int __blkdev_put(struct block_device *bdev, int for_part)
}
if (bdev->bd_contains == bdev) {
if (disk->fops->release)
ret = disk->fops->release(bd_inode, NULL);
ret = disk->fops->release(disk, mode);
}
if (!bdev->bd_openers) {
struct module *owner = disk->fops->owner;
@@ -1197,13 +1182,13 @@ static int __blkdev_put(struct block_device *bdev, int for_part)
mutex_unlock(&bdev->bd_mutex);
bdput(bdev);
if (victim)
__blkdev_put(victim, 1);
__blkdev_put(victim, mode, 1);
return ret;
}
int blkdev_put(struct block_device *bdev)
int blkdev_put(struct block_device *bdev, fmode_t mode)
{
return __blkdev_put(bdev, 0);
return __blkdev_put(bdev, mode, 0);
}
EXPORT_SYMBOL(blkdev_put);
@@ -1212,12 +1197,16 @@ static int blkdev_close(struct inode * inode, struct file * filp)
struct block_device *bdev = I_BDEV(filp->f_mapping->host);
if (bdev->bd_holder == filp)
bd_release(bdev);
return blkdev_put(bdev);
return blkdev_put(bdev, filp->f_mode);
}
static long block_ioctl(struct file *file, unsigned cmd, unsigned long arg)
{
return blkdev_ioctl(file->f_mapping->host, file, cmd, arg);
struct block_device *bdev = I_BDEV(file->f_mapping->host);
fmode_t mode = file->f_mode;
if (file->f_flags & O_NDELAY)
mode |= FMODE_NDELAY_NOW;
return blkdev_ioctl(bdev, mode, cmd, arg);
}
static const struct address_space_operations def_blk_aops = {
@@ -1253,7 +1242,7 @@ int ioctl_by_bdev(struct block_device *bdev, unsigned cmd, unsigned long arg)
int res;
mm_segment_t old_fs = get_fs();
set_fs(KERNEL_DS);
res = blkdev_ioctl(bdev->bd_inode, NULL, cmd, arg);
res = blkdev_ioctl(bdev, 0, cmd, arg);
set_fs(old_fs);
return res;
}
@@ -1303,32 +1292,29 @@ fail:
EXPORT_SYMBOL(lookup_bdev);
/**
* open_bdev_excl - open a block device by name and set it up for use
* open_bdev_exclusive - open a block device by name and set it up for use
*
* @path: special file representing the block device
* @flags: %MS_RDONLY for opening read-only
* @mode: FMODE_... combination to pass be used
* @holder: owner for exclusion
*
* Open the blockdevice described by the special file at @path, claim it
* for the @holder.
*/
struct block_device *open_bdev_excl(const char *path, int flags, void *holder)
struct block_device *open_bdev_exclusive(const char *path, fmode_t mode, void *holder)
{
struct block_device *bdev;
mode_t mode = FMODE_READ;
int error = 0;
bdev = lookup_bdev(path);
if (IS_ERR(bdev))
return bdev;
if (!(flags & MS_RDONLY))
mode |= FMODE_WRITE;
error = blkdev_get(bdev, mode, 0);
error = blkdev_get(bdev, mode);
if (error)
return ERR_PTR(error);
error = -EACCES;
if (!(flags & MS_RDONLY) && bdev_read_only(bdev))
if ((mode & FMODE_WRITE) && bdev_read_only(bdev))
goto blkdev_put;
error = bd_claim(bdev, holder);
if (error)
@@ -1337,26 +1323,27 @@ struct block_device *open_bdev_excl(const char *path, int flags, void *holder)
return bdev;
blkdev_put:
blkdev_put(bdev);
blkdev_put(bdev, mode);
return ERR_PTR(error);
}
EXPORT_SYMBOL(open_bdev_excl);
EXPORT_SYMBOL(open_bdev_exclusive);
/**
* close_bdev_excl - release a blockdevice openen by open_bdev_excl()
* close_bdev_exclusive - close a blockdevice opened by open_bdev_exclusive()
*
* @bdev: blockdevice to close
* @mode: mode, must match that used to open.
*
* This is the counterpart to open_bdev_excl().
* This is the counterpart to open_bdev_exclusive().
*/
void close_bdev_excl(struct block_device *bdev)
void close_bdev_exclusive(struct block_device *bdev, fmode_t mode)
{
bd_release(bdev);
blkdev_put(bdev);
blkdev_put(bdev, mode);
}
EXPORT_SYMBOL(close_bdev_excl);
EXPORT_SYMBOL(close_bdev_exclusive);
int __invalidate_device(struct block_device *bdev)
{