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authorLinus Torvalds <torvalds@woody.linux-foundation.org>2007-12-20 11:25:22 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-12-20 11:25:22 -0800
commit17eb2c3b56afe72f76330b5db657c8b4fc98aa39 (patch)
tree89aaaf505626209729ca0843467288f070680e58 /drivers/md/dm.c
parent3c378158d4cd2125b42fe2b8bb23d512fdff6fe6 (diff)
parent91e106259214b40e992a58fb9417da46868e19b2 (diff)
downloadlinux-sh-17eb2c3b56afe72f76330b5db657c8b4fc98aa39.tar.gz
Merge git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-2.6-dm
* git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-2.6-dm: dm crypt: use bio_add_page dm: merge max_hw_sector dm: trigger change uevent on rename dm crypt: fix write endio dm mpath: hp requires scsi dm: table detect io beyond device
Diffstat (limited to 'drivers/md/dm.c')
-rw-r--r--drivers/md/dm.c31
1 files changed, 24 insertions, 7 deletions
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 07cbbb8eb3e0..88c0fd657825 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -672,13 +672,19 @@ static struct bio *clone_bio(struct bio *bio, sector_t sector,
return clone;
}
-static void __clone_and_map(struct clone_info *ci)
+static int __clone_and_map(struct clone_info *ci)
{
struct bio *clone, *bio = ci->bio;
- struct dm_target *ti = dm_table_find_target(ci->map, ci->sector);
- sector_t len = 0, max = max_io_len(ci->md, ci->sector, ti);
+ struct dm_target *ti;
+ sector_t len = 0, max;
struct dm_target_io *tio;
+ ti = dm_table_find_target(ci->map, ci->sector);
+ if (!dm_target_is_valid(ti))
+ return -EIO;
+
+ max = max_io_len(ci->md, ci->sector, ti);
+
/*
* Allocate a target io object.
*/
@@ -736,6 +742,9 @@ static void __clone_and_map(struct clone_info *ci)
do {
if (offset) {
ti = dm_table_find_target(ci->map, ci->sector);
+ if (!dm_target_is_valid(ti))
+ return -EIO;
+
max = max_io_len(ci->md, ci->sector, ti);
tio = alloc_tio(ci->md);
@@ -759,6 +768,8 @@ static void __clone_and_map(struct clone_info *ci)
ci->idx++;
}
+
+ return 0;
}
/*
@@ -767,6 +778,7 @@ static void __clone_and_map(struct clone_info *ci)
static int __split_bio(struct mapped_device *md, struct bio *bio)
{
struct clone_info ci;
+ int error = 0;
ci.map = dm_get_table(md);
if (unlikely(!ci.map))
@@ -784,11 +796,11 @@ static int __split_bio(struct mapped_device *md, struct bio *bio)
ci.idx = bio->bi_idx;
start_io_acct(ci.io);
- while (ci.sector_count)
- __clone_and_map(&ci);
+ while (ci.sector_count && !error)
+ error = __clone_and_map(&ci);
/* drop the extra reference count */
- dec_pending(ci.io, 0);
+ dec_pending(ci.io, error);
dm_table_put(ci.map);
return 0;
@@ -1502,7 +1514,7 @@ int dm_resume(struct mapped_device *md)
dm_table_unplug_all(map);
- kobject_uevent(&md->disk->kobj, KOBJ_CHANGE);
+ dm_kobject_uevent(md);
r = 0;
@@ -1516,6 +1528,11 @@ out:
/*-----------------------------------------------------------------
* Event notification.
*---------------------------------------------------------------*/
+void dm_kobject_uevent(struct mapped_device *md)
+{
+ kobject_uevent(&md->disk->kobj, KOBJ_CHANGE);
+}
+
uint32_t dm_next_uevent_seq(struct mapped_device *md)
{
return atomic_add_return(1, &md->uevent_seq);