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dm-io: report non-retryable errors separatedly

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The error codes BLK_STS_NOTSUPP and BLK_STS_INVAL should not cause leg
failure on dm-raid1. This patch changes the interface to dm-io, so that
it reports two error bitmaps - error_bits and unsup_bits. The unsup_bit
bitmap tracks BLK_STS_NOTSUPP or BLK_STS_INVAL errors, the error_bits
bitmap tracks all the other errors.

dm-raid1 is changed so that it won't fail a leg if it receives an error
in the unsup_bits bitmap.

This patch (with 62dc37a819) fixes misbehavior if the user uses
unaligned bio vectors on dm-raid1.

Fixes: 7eac331869 ("iomap: simplify direct io validity check")
Fixes: 5ff3f74e14 ("block: simplify direct io validity check")
Cc: stable@vger.kernel.org
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
This commit is contained in:
Mikulas Patocka 2026-07-27 23:09:28 +02:00
commit 47a5e62f39
10 changed files with 83 additions and 54 deletions
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