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| author | Guo Chao <yan@linux.vnet.ibm.com> | 2013-02-22 00:16:47 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2013-02-22 10:43:22 +0100 |
| commit | 7b0576a3d835b4d46ed85d817ce016e90bf293a3 (patch) | |
| tree | 9c9d9780f3ef794e8d20d2057a722bcab843fad5 /drivers/block/loop.c | |
| parent | loopdev: update block device size in loop_set_status() (diff) | |
| download | linux-7b0576a3d835b4d46ed85d817ce016e90bf293a3.tar.xz linux-7b0576a3d835b4d46ed85d817ce016e90bf293a3.zip | |
loopdev: move common code into loop_figure_size()
Update block device size in accord with gendisk size and let userspace
know the change in loop_figure_size(). This is a clean up to remove
common code of loop_figure_size()'s two callers.
Signed-off-by: Guo Chao <yan@linux.vnet.ibm.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Guo Chao <yan@linux.vnet.ibm.com>
Cc: M. Hindess <hindessm@uk.ibm.com>
Cc: Nikanth Karthikesan <knikanth@suse.de>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/block/loop.c')
| -rw-r--r-- | drivers/block/loop.c | 31 |
1 files changed, 7 insertions, 24 deletions
diff --git a/drivers/block/loop.c b/drivers/block/loop.c index ed850366f22d..6579f69fd7a4 100644 --- a/drivers/block/loop.c +++ b/drivers/block/loop.c @@ -190,6 +190,7 @@ figure_loop_size(struct loop_device *lo, loff_t offset, loff_t sizelimit) { loff_t size = get_size(offset, sizelimit, lo->lo_backing_file); sector_t x = (sector_t)size; + struct block_device *bdev = lo->lo_device; if (unlikely((loff_t)x != size)) return -EFBIG; @@ -198,6 +199,9 @@ figure_loop_size(struct loop_device *lo, loff_t offset, loff_t sizelimit) if (lo->lo_sizelimit != sizelimit) lo->lo_sizelimit = sizelimit; set_capacity(lo->lo_disk, x); + bd_set_size(bdev, (loff_t)get_capacity(bdev->bd_disk) << 9); + /* let user-space know about the new size */ + kobject_uevent(&disk_to_dev(bdev->bd_disk)->kobj, KOBJ_CHANGE); return 0; } @@ -1091,15 +1095,10 @@ loop_set_status(struct loop_device *lo, const struct loop_info64 *info) return err; if (lo->lo_offset != info->lo_offset || - lo->lo_sizelimit != info->lo_sizelimit) { - struct block_device *bdev = lo->lo_device; - + lo->lo_sizelimit != info->lo_sizelimit) if (figure_loop_size(lo, info->lo_offset, info->lo_sizelimit)) return -EFBIG; - bd_set_size(bdev, (loff_t)get_capacity(bdev->bd_disk) << 9); - kobject_uevent(&disk_to_dev(bdev->bd_disk)->kobj, KOBJ_CHANGE); - } loop_config_discard(lo); memcpy(lo->lo_file_name, info->lo_file_name, LO_NAME_SIZE); @@ -1276,26 +1275,10 @@ loop_get_status64(struct loop_device *lo, struct loop_info64 __user *arg) { static int loop_set_capacity(struct loop_device *lo, struct block_device *bdev) { - int err; - sector_t sec; - loff_t sz; - - err = -ENXIO; if (unlikely(lo->lo_state != Lo_bound)) - goto out; - err = figure_loop_size(lo, lo->lo_offset, lo->lo_sizelimit); - if (unlikely(err)) - goto out; - sec = get_capacity(lo->lo_disk); - /* the width of sector_t may be narrow for bit-shift */ - sz = sec; - sz <<= 9; - bd_set_size(bdev, sz); - /* let user-space know about the new size */ - kobject_uevent(&disk_to_dev(bdev->bd_disk)->kobj, KOBJ_CHANGE); + return -ENXIO; - out: - return err; + return figure_loop_size(lo, lo->lo_offset, lo->lo_sizelimit); } static int lo_ioctl(struct block_device *bdev, fmode_t mode, |