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Update the correct abd in l2arc_read_done() 

This patch fixes an issue where l2arc_read_done() would always
write data to b_pabd, even if raw encrypted data was requested.
This only occured in cases where the L2ARC device had a different
ashift than the main pool.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Signed-off-by: Tom Caputi <tcaputi@datto.com>
Closes #7586 
Closes #7593
This commit is contained in:
Tom Caputi 2018-06-06 13:17:50 -04:00 committed by Brian Behlendorf
parent e7504d7a18
commit b405837a6c
1 changed files with 12 additions and 9 deletions
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21
module/zfs/arc.c
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@ -8248,17 +8248,18 @@ static void
l2arc_read_done(zio_t *zio)
{
int tfm_error = 0;
l2arc_read_callback_t *cb;
l2arc_read_callback_t *cb = zio->io_private;
arc_buf_hdr_t *hdr;
kmutex_t *hash_lock;
boolean_t valid_cksum, using_rdata;
boolean_t valid_cksum;
boolean_t using_rdata = (BP_IS_ENCRYPTED(&cb->l2rcb_bp) &&
(cb->l2rcb_flags & ZIO_FLAG_RAW_ENCRYPT));
ASSERT3P(zio->io_vd, !=, NULL);
ASSERT(zio->io_flags & ZIO_FLAG_DONT_PROPAGATE);
spa_config_exit(zio->io_spa, SCL_L2ARC, zio->io_vd);
cb = zio->io_private;
ASSERT3P(cb, !=, NULL);
hdr = cb->l2rcb_hdr;
ASSERT3P(hdr, !=, NULL);
@ -8274,8 +8275,13 @@ l2arc_read_done(zio_t *zio)
if (cb->l2rcb_abd != NULL) {
ASSERT3U(arc_hdr_size(hdr), <, zio->io_size);
if (zio->io_error == 0) {
abd_copy(hdr->b_l1hdr.b_pabd, cb->l2rcb_abd,
arc_hdr_size(hdr));
if (using_rdata) {
abd_copy(hdr->b_crypt_hdr.b_rabd,
cb->l2rcb_abd, arc_hdr_size(hdr));
} else {
abd_copy(hdr->b_l1hdr.b_pabd,
cb->l2rcb_abd, arc_hdr_size(hdr));
}
}
/*
@ -8292,8 +8298,7 @@ l2arc_read_done(zio_t *zio)
abd_free(cb->l2rcb_abd);
zio->io_size = zio->io_orig_size = arc_hdr_size(hdr);
if (BP_IS_ENCRYPTED(&cb->l2rcb_bp) &&
(cb->l2rcb_flags & ZIO_FLAG_RAW_ENCRYPT)) {
if (using_rdata) {
ASSERT(HDR_HAS_RABD(hdr));
zio->io_abd = zio->io_orig_abd =
hdr->b_crypt_hdr.b_rabd;
@ -8314,8 +8319,6 @@ l2arc_read_done(zio_t *zio)
zio->io_bp = &zio->io_bp_copy; /* XXX fix in L2ARC 2.0 */
valid_cksum = arc_cksum_is_equal(hdr, zio);
using_rdata = (HDR_HAS_RABD(hdr) &&
zio->io_abd == hdr->b_crypt_hdr.b_rabd);
/*
* b_rabd will always match the data as it exists on disk if it is