diff options
Diffstat (limited to 'drivers/target/target_core_sbc.c')
| -rw-r--r-- | drivers/target/target_core_sbc.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/target/target_core_sbc.c b/drivers/target/target_core_sbc.c index a5a8f463004b..45e11d0e38c4 100644 --- a/drivers/target/target_core_sbc.c +++ b/drivers/target/target_core_sbc.c @@ -238,12 +238,19 @@ static inline unsigned long long transport_lba_64_ext(unsigned char *cdb) static sense_reason_t sbc_setup_write_same(struct se_cmd *cmd, unsigned char *flags, struct sbc_ops *ops) { + unsigned int sectors = spc_get_write_same_sectors(cmd); + if ((flags[0] & 0x04) || (flags[0] & 0x02)) { pr_err("WRITE_SAME PBDATA and LBDATA" " bits not supported for Block Discard" " Emulation\n"); return TCM_UNSUPPORTED_SCSI_OPCODE; } + if (sectors > cmd->se_dev->dev_attrib.max_write_same_len) { + pr_warn("WRITE_SAME sectors: %u exceeds max_write_same_len: %u\n", + sectors, cmd->se_dev->dev_attrib.max_write_same_len); + return TCM_INVALID_CDB_FIELD; + } /* * Special case for WRITE_SAME w/ UNMAP=1 that ends up getting * translated into block discard requests within backend code. |