diff options
| author | Nicholas Bellinger <nab@linux-iscsi.org> | 2014-10-04 05:06:08 +0400 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2014-10-04 09:41:20 +0400 |
| commit | 92404e609a2dffc55a9a22540ed48b6f0edc9c59 (patch) | |
| tree | f815d53d2611a9b0cab864fc70bcffc26c8f043b /drivers/target/target_core_pr.c | |
| parent | e24805637d2d270d7975502e9024d473de86afdb (diff) | |
| download | linux-92404e609a2dffc55a9a22540ed48b6f0edc9c59.tar.xz | |
target: Add force_pr_aptpl device attribute
This patch adds a force_pr_aptpl device attribute used to force SPC-3 PR
Activate Persistence across Target Power Loss (APTPL) operation. This
makes PR metadata write-out occur during state change regardless if new
PERSISTENT_RESERVE_OUT CDBs have their APTPL feature bit set.
This is useful during H/A failover in active/passive setups where all PR
state is being re-created on a different node, driven by configfs backend
device + export layout and pre-loaded $DEV/pr/res_aptpl_metadata.
Cc: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/target/target_core_pr.c')
| -rw-r--r-- | drivers/target/target_core_pr.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/target/target_core_pr.c b/drivers/target/target_core_pr.c index a06edb59b67f..8c60a1a1ae8d 100644 --- a/drivers/target/target_core_pr.c +++ b/drivers/target/target_core_pr.c @@ -895,6 +895,7 @@ static int __core_scsi3_check_aptpl_registration( spin_lock(&pr_tmpl->aptpl_reg_lock); list_for_each_entry_safe(pr_reg, pr_reg_tmp, &pr_tmpl->aptpl_reg_list, pr_reg_aptpl_list) { + if (!strcmp(pr_reg->pr_iport, i_port) && (pr_reg->pr_res_mapped_lun == deve->mapped_lun) && !(strcmp(pr_reg->pr_tport, t_port)) && @@ -3470,6 +3471,7 @@ static unsigned long long core_scsi3_extract_reservation_key(unsigned char *cdb) sense_reason_t target_scsi3_emulate_pr_out(struct se_cmd *cmd) { + struct se_device *dev = cmd->se_dev; unsigned char *cdb = &cmd->t_task_cdb[0]; unsigned char *buf; u64 res_key, sa_res_key; @@ -3534,6 +3536,13 @@ target_scsi3_emulate_pr_out(struct se_cmd *cmd) aptpl = (buf[17] & 0x01); unreg = (buf[17] & 0x02); } + /* + * If the backend device has been configured to force APTPL metadata + * write-out, go ahead and propigate aptpl=1 down now. + */ + if (dev->dev_attrib.force_pr_aptpl) + aptpl = 1; + transport_kunmap_data_sg(cmd); buf = NULL; |