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| author | Nicholas Bellinger <nab@linux-iscsi.org> | 2011-08-10 18:41:14 -0700 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2011-08-22 19:26:25 +0000 |
| commit | 7abbe7f3e4243e28a9169ee1b8d76f10a6f5d37c (patch) | |
| tree | 7edb86180f5b093cbef210562af8712d2d98d7fa /drivers | |
| parent | 72f4ba1e32a1e5da31dcf14ea4b8985ae88a8bdb (diff) | |
| download | linux-7abbe7f3e4243e28a9169ee1b8d76f10a6f5d37c.tar.bz2 | |
target: Fix SYNCHRONIZE_CACHE zero LBA + range breakage
This patch fixes a SYNCHRONIZE_CACHE CDB handling bug with IBLOCK/FILEIO
backends where transport_cmd_get_valid_sectors() was incorrectly rejecting
a zero LBA + range CDB from being processed, and returning CHECK_CONDITION.
This includes changing transport_cmd_get_valid_sectors() to return '0' on
success and '-EINVAL' on failure (this makes more sense than sectors),
and to only check transport_cmd_get_valid_sectors() when a non zero LBA +
range SYNCHRONIZE_CACHE operation has been receieved for the non passthrough
case.
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/target/target_core_transport.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c index d35c2cc779e9..d385c317a7a4 100644 --- a/drivers/target/target_core_transport.c +++ b/drivers/target/target_core_transport.c @@ -2853,12 +2853,10 @@ static int transport_cmd_get_valid_sectors(struct se_cmd *cmd) " transport_dev_end_lba(): %llu\n", cmd->t_task_lba, sectors, transport_dev_end_lba(dev)); - pr_err(" We should return CHECK_CONDITION" - " but we don't yet\n"); - return 0; + return -EINVAL; } - return sectors; + return 0; } static int target_check_write_same_discard(unsigned char *flags, struct se_device *dev) @@ -3350,10 +3348,12 @@ static int transport_generic_cmd_sequencer( cmd->se_cmd_flags |= SCF_EMULATE_CDB_ASYNC; /* * Check to ensure that LBA + Range does not exceed past end of - * device. + * device for IBLOCK and FILEIO ->do_sync_cache() backend calls */ - if (!transport_cmd_get_valid_sectors(cmd)) - goto out_invalid_cdb_field; + if ((cmd->t_task_lba != 0) || (sectors != 0)) { + if (transport_cmd_get_valid_sectors(cmd) < 0) + goto out_invalid_cdb_field; + } break; case UNMAP: size = get_unaligned_be16(&cdb[7]); |