diff options
Diffstat (limited to 'drivers/target/target_core_rd.c')
| -rw-r--r-- | drivers/target/target_core_rd.c | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/drivers/target/target_core_rd.c b/drivers/target/target_core_rd.c index e0b3c379aa1..0921a64b555 100644 --- a/drivers/target/target_core_rd.c +++ b/drivers/target/target_core_rd.c @@ -291,6 +291,11 @@ rd_execute_rw(struct se_cmd *cmd) u32 src_len; u64 tmp; + if (dev->rd_flags & RDF_NULLIO) { + target_complete_cmd(cmd, SAM_STAT_GOOD); + return 0; + } + tmp = cmd->t_task_lba * se_dev->dev_attrib.block_size; rd_offset = do_div(tmp, PAGE_SIZE); rd_page = tmp; @@ -373,11 +378,12 @@ rd_execute_rw(struct se_cmd *cmd) } enum { - Opt_rd_pages, Opt_err + Opt_rd_pages, Opt_rd_nullio, Opt_err }; static match_table_t tokens = { {Opt_rd_pages, "rd_pages=%d"}, + {Opt_rd_nullio, "rd_nullio=%d"}, {Opt_err, NULL} }; @@ -408,6 +414,14 @@ static ssize_t rd_set_configfs_dev_params(struct se_device *dev, " Count: %u\n", rd_dev->rd_page_count); rd_dev->rd_flags |= RDF_HAS_PAGE_COUNT; break; + case Opt_rd_nullio: + match_int(args, &arg); + if (arg != 1) + break; + + pr_debug("RAMDISK: Setting NULLIO flag: %d\n", arg); + rd_dev->rd_flags |= RDF_NULLIO; + break; default: break; } @@ -424,8 +438,9 @@ static ssize_t rd_show_configfs_dev_params(struct se_device *dev, char *b) ssize_t bl = sprintf(b, "TCM RamDisk ID: %u RamDisk Makeup: rd_mcp\n", rd_dev->rd_dev_id); bl += sprintf(b + bl, " PAGES/PAGE_SIZE: %u*%lu" - " SG_table_count: %u\n", rd_dev->rd_page_count, - PAGE_SIZE, rd_dev->sg_table_count); + " SG_table_count: %u nullio: %d\n", rd_dev->rd_page_count, + PAGE_SIZE, rd_dev->sg_table_count, + !!(rd_dev->rd_flags & RDF_NULLIO)); return bl; } |