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authorChristoph Hellwig <hch@lst.de>2024-03-14 05:16:23 +0300
committerJens Axboe <axboe@kernel.dk>2024-03-14 05:35:48 +0300
commitbf5e3a30f777b6e763f6a46c10e1250c20237e97 (patch)
tree766aa66fdfa4ef0856b664ef724ac6f84eab684d /block
parent256aab46e31683d76d45ccbedc287b4d3f3e322b (diff)
downloadlinux-bf5e3a30f777b6e763f6a46c10e1250c20237e97.tar.xz
Revert "blk-lib: check for kill signal"
This reverts commit 8a08c5fd89b447a7de7eb293a7a274c46b932ba2. It turns out while this is a perfectly valid and long overdue thing to do for user initiated discards / zeroing from the ioctl handler, it actually breaks file system use of the discard helper by interrupting in places the file system doesn't expect, and by leaving the bio chain in a state that the file system callers of (at least) __blkdev_issue_discard do not expect. Revert the change for now, we'll redo it for the next merge window after refactoring the code to better split the file system vs ioctl callers and cleaning up a few other loose ends. Reported-by: Chandan Babu R <chandanbabu@kernel.org> Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Keith Busch <kbusch@kernel.org> Link: https://lore.kernel.org/r/20240314021623.1908895-1-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block')
-rw-r--r--block/blk-lib.c40
1 files changed, 1 insertions, 39 deletions
diff --git a/block/blk-lib.c b/block/blk-lib.c
index dc8e35d0a51d..a6954eafb8c8 100644
--- a/block/blk-lib.c
+++ b/block/blk-lib.c
@@ -35,26 +35,6 @@ static sector_t bio_discard_limit(struct block_device *bdev, sector_t sector)
return round_down(UINT_MAX, discard_granularity) >> SECTOR_SHIFT;
}
-static void await_bio_endio(struct bio *bio)
-{
- complete(bio->bi_private);
- bio_put(bio);
-}
-
-/*
- * await_bio_chain - ends @bio and waits for every chained bio to complete
- */
-static void await_bio_chain(struct bio *bio)
-{
- DECLARE_COMPLETION_ONSTACK_MAP(done,
- bio->bi_bdev->bd_disk->lockdep_map);
-
- bio->bi_private = &done;
- bio->bi_end_io = await_bio_endio;
- bio_endio(bio);
- blk_wait_io(&done);
-}
-
int __blkdev_issue_discard(struct block_device *bdev, sector_t sector,
sector_t nr_sects, gfp_t gfp_mask, struct bio **biop)
{
@@ -97,10 +77,6 @@ int __blkdev_issue_discard(struct block_device *bdev, sector_t sector,
* is disabled.
*/
cond_resched();
- if (fatal_signal_pending(current)) {
- await_bio_chain(bio);
- return -EINTR;
- }
}
*biop = bio;
@@ -167,10 +143,6 @@ static int __blkdev_issue_write_zeroes(struct block_device *bdev,
nr_sects -= len;
sector += len;
cond_resched();
- if (fatal_signal_pending(current)) {
- await_bio_chain(bio);
- return -EINTR;
- }
}
*biop = bio;
@@ -215,10 +187,6 @@ static int __blkdev_issue_zero_pages(struct block_device *bdev,
break;
}
cond_resched();
- if (fatal_signal_pending(current)) {
- await_bio_chain(bio);
- return -EINTR;
- }
}
*biop = bio;
@@ -309,7 +277,7 @@ retry:
bio_put(bio);
}
blk_finish_plug(&plug);
- if (ret && ret != -EINTR && try_write_zeroes) {
+ if (ret && try_write_zeroes) {
if (!(flags & BLKDEV_ZERO_NOFALLBACK)) {
try_write_zeroes = false;
goto retry;
@@ -361,12 +329,6 @@ int blkdev_issue_secure_erase(struct block_device *bdev, sector_t sector,
sector += len;
nr_sects -= len;
cond_resched();
- if (fatal_signal_pending(current)) {
- await_bio_chain(bio);
- ret = -EINTR;
- bio = NULL;
- break;
- }
}
if (bio) {
ret = submit_bio_wait(bio);