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[PATCH] propagate mode through open_bdev_excl/close_bdev_excl

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replace open_bdev_excl/close_bdev_excl with variants taking fmode_t.
superblock gets the value used to mount it stored in sb->s_mode

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2008-02-22 19:50:45 -05:00
parent 9a1c354276
commit 30c40d2c01
6 changed files with 31 additions and 24 deletions
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24
fs/block_dev.c
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@ -1309,32 +1309,29 @@ 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;
fmode_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);
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)
@ -1347,22 +1344,23 @@ blkdev_put:
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, 0); /* move up in the next patches */
blkdev_put(bdev, mode);
}
EXPORT_SYMBOL(close_bdev_excl);
EXPORT_SYMBOL(close_bdev_exclusive);
int __invalidate_device(struct block_device *bdev)
{