diff options
Diffstat (limited to 'drivers/target/target_core_device.c')
| -rw-r--r-- | drivers/target/target_core_device.c | 32 |
1 files changed, 29 insertions, 3 deletions
diff --git a/drivers/target/target_core_device.c b/drivers/target/target_core_device.c index 58f49ff69b14..7faa6aef9a4d 100644 --- a/drivers/target/target_core_device.c +++ b/drivers/target/target_core_device.c @@ -650,6 +650,18 @@ static u32 se_dev_align_max_sectors(u32 max_sectors, u32 block_size) return aligned_max_sectors; } +bool se_dev_check_wce(struct se_device *dev) +{ + bool wce = false; + + if (dev->transport->get_write_cache) + wce = dev->transport->get_write_cache(dev); + else if (dev->dev_attrib.emulate_write_cache > 0) + wce = true; + + return wce; +} + int se_dev_set_max_unmap_lba_count( struct se_device *dev, u32 max_unmap_lba_count) @@ -767,6 +779,16 @@ int se_dev_set_emulate_fua_write(struct se_device *dev, int flag) pr_err("Illegal value %d\n", flag); return -EINVAL; } + if (flag && + dev->transport->get_write_cache) { + pr_warn("emulate_fua_write not supported for this device, ignoring\n"); + return 0; + } + if (dev->export_count) { + pr_err("emulate_fua_write cannot be changed with active" + " exports: %d\n", dev->export_count); + return -EINVAL; + } dev->dev_attrib.emulate_fua_write = flag; pr_debug("dev[%p]: SE Device Forced Unit Access WRITEs: %d\n", dev, dev->dev_attrib.emulate_fua_write); @@ -801,7 +823,11 @@ int se_dev_set_emulate_write_cache(struct se_device *dev, int flag) pr_err("emulate_write_cache not supported for this device\n"); return -EINVAL; } - + if (dev->export_count) { + pr_err("emulate_write_cache cannot be changed with active" + " exports: %d\n", dev->export_count); + return -EINVAL; + } dev->dev_attrib.emulate_write_cache = flag; pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n", dev, dev->dev_attrib.emulate_write_cache); @@ -1534,8 +1560,6 @@ int target_configure_device(struct se_device *dev) ret = dev->transport->configure_device(dev); if (ret) goto out; - dev->dev_flags |= DF_CONFIGURED; - /* * XXX: there is not much point to have two different values here.. */ @@ -1597,6 +1621,8 @@ int target_configure_device(struct se_device *dev) list_add_tail(&dev->g_dev_node, &g_device_list); mutex_unlock(&g_device_mutex); + dev->dev_flags |= DF_CONFIGURED; + return 0; out_free_alua: |