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Decryption error handling improvements

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Currently, the decryption and block authentication code in
the ZIO / ARC layers is a bit inconsistent with regards to
the ereports that are produces and the error codes that are
passed to calling functions. This patch ensures that all of
these errors (which begin as ECKSUM) are converted to EIO
before they leave the ZIO or ARC layer and that ereports
are correctly generated on each decryption / authentication
failure.

In addition, this patch fixes a bug in zio_decrypt() where
ECKSUM never gets written to zio->io_error.

Reviewed by: Matt Ahrens <matt@delphix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Tom Caputi <tcaputi@datto.com>
Closes #7372
This commit is contained in:
Tom Caputi
2018-03-31 14:12:51 -04:00
committed by Brian Behlendorf
parent 4515b1d01c
commit a2c2ed1bd4
9 changed files with 68 additions and 23 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/sys/zio.h
+5 -4
View File
@@ -649,8 +649,8 @@ extern hrtime_t zio_handle_io_delay(zio_t *zio);
* Checksum ereport functions
*/
extern void zfs_ereport_start_checksum(spa_t *spa, vdev_t *vd,
zbookmark_phys_t *zb, struct zio *zio, uint64_t offset, uint64_t length,
void *arg, struct zio_bad_cksum *info);
const zbookmark_phys_t *zb, struct zio *zio, uint64_t offset,
uint64_t length, void *arg, struct zio_bad_cksum *info);
extern void zfs_ereport_finish_checksum(zio_cksum_report_t *report,
const abd_t *good_data, const abd_t *bad_data, boolean_t drop_if_identical);
@@ -658,8 +658,9 @@ extern void zfs_ereport_free_checksum(zio_cksum_report_t *report);
/* If we have the good data in hand, this function can be used */
extern void zfs_ereport_post_checksum(spa_t *spa, vdev_t *vd,
zbookmark_phys_t *zb, struct zio *zio, uint64_t offset, uint64_t length,
const abd_t *good_data, const abd_t *bad_data, struct zio_bad_cksum *info);
const zbookmark_phys_t *zb, struct zio *zio, uint64_t offset,
uint64_t length, const abd_t *good_data, const abd_t *bad_data,
struct zio_bad_cksum *info);
/* Called from spa_sync(), but primarily an injection handler */
extern void spa_handle_ignored_writes(spa_t *spa);