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target/sbc: Remove sbc_check_valid_sectors()

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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>
This commit is contained in:
Christophe Vu-Brugier 2014-06-10 17:53:21 +02:00 committed by Nicholas Bellinger
parent 22c7aaa57e
commit 6ef31dc720
1 changed files with 6 additions and 39 deletions
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45
drivers/target/target_core_sbc.c
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@ -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 "