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authorChristophe Vu-Brugier <cvubrugier@yahoo.fr>2014-06-10 17:53:21 +0200
committerNicholas Bellinger <nab@linux-iscsi.org>2014-06-11 11:52:40 -0700
commit6ef31dc720cff4dc6a67ccb8c73c56dbf2ea6a08 (patch)
treef1f7fe44b3de9d64dea919ff3bea774cd0760c58 /drivers
parent22c7aaa57e80853b4904a46c18f97db0036a3b97 (diff)
downloadop-kernel-dev-6ef31dc720cff4dc6a67ccb8c73c56dbf2ea6a08.zip
op-kernel-dev-6ef31dc720cff4dc6a67ccb8c73c56dbf2ea6a08.tar.gz
target/sbc: Remove sbc_check_valid_sectors()
A similar check is performed at the end of sbc_parse_cdb() and is now enforced if the SYNCHRONIZE CACHE command's backend supports ->execute_sync_cache(). (Add check_lba goto to avoid *_max_sectors checks - nab) Signed-off-by: Christophe Vu-Brugier <cvubrugier@yahoo.fr> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/target/target_core_sbc.c45
1 files changed, 6 insertions, 39 deletions
diff --git a/drivers/target/target_core_sbc.c b/drivers/target/target_core_sbc.c
index e022959..7675d2a 100644
--- a/drivers/target/target_core_sbc.c
+++ b/drivers/target/target_core_sbc.c
@@ -176,24 +176,6 @@ static inline u32 sbc_get_size(struct se_cmd *cmd, u32 sectors)
return cmd->se_dev->dev_attrib.block_size * sectors;
}
-static int sbc_check_valid_sectors(struct se_cmd *cmd)
-{
- struct se_device *dev = cmd->se_dev;
- unsigned long long end_lba;
- u32 sectors;
-
- sectors = cmd->data_length / dev->dev_attrib.block_size;
- end_lba = dev->transport->get_blocks(dev) + 1;
-
- if (cmd->t_task_lba + sectors > end_lba) {
- pr_err("target: lba %llu, sectors %u exceeds end lba %llu\n",
- cmd->t_task_lba, sectors, end_lba);
- return -EINVAL;
- }
-
- return 0;
-}
-
static inline u32 transport_get_sectors_6(unsigned char *cdb)
{
/*
@@ -877,15 +859,6 @@ sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops)
break;
case SYNCHRONIZE_CACHE:
case SYNCHRONIZE_CACHE_16:
- if (!ops->execute_sync_cache) {
- size = 0;
- cmd->execute_cmd = sbc_emulate_noop;
- break;
- }
-
- /*
- * Extract LBA and range to be flushed for emulated SYNCHRONIZE_CACHE
- */
if (cdb[0] == SYNCHRONIZE_CACHE) {
sectors = transport_get_sectors_10(cdb);
cmd->t_task_lba = transport_lba_32(cdb);
@@ -893,18 +866,12 @@ sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops)
sectors = transport_get_sectors_16(cdb);
cmd->t_task_lba = transport_lba_64(cdb);
}
-
- size = sbc_get_size(cmd, sectors);
-
- /*
- * Check to ensure that LBA + Range does not exceed past end of
- * device for IBLOCK and FILEIO ->do_sync_cache() backend calls
- */
- if (cmd->t_task_lba || sectors) {
- if (sbc_check_valid_sectors(cmd) < 0)
- return TCM_ADDRESS_OUT_OF_RANGE;
+ if (ops->execute_sync_cache) {
+ cmd->execute_cmd = ops->execute_sync_cache;
+ goto check_lba;
}
- cmd->execute_cmd = ops->execute_sync_cache;
+ size = 0;
+ cmd->execute_cmd = sbc_emulate_noop;
break;
case UNMAP:
if (!ops->execute_unmap)
@@ -988,7 +955,7 @@ sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops)
dev->dev_attrib.hw_max_sectors);
return TCM_INVALID_CDB_FIELD;
}
-
+check_lba:
end_lba = dev->transport->get_blocks(dev) + 1;
if (cmd->t_task_lba + sectors > end_lba) {
pr_err("cmd exceeds last lba %llu "
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