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| author | Nicholas Bellinger <nab@linux-iscsi.org> | 2014-12-19 00:49:23 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-03-26 15:07:00 +0100 |
| commit | c3d6b5796b22abf78007bd6bb196d1f95a29ac19 (patch) | |
| tree | eb2ef90f06b32ce60ba65677584af6f34986c491 | |
| parent | dc366beadc4ef90c86082eb80b6cd772da1f2113 (diff) | |
| download | lwn-c3d6b5796b22abf78007bd6bb196d1f95a29ac19.tar.gz lwn-c3d6b5796b22abf78007bd6bb196d1f95a29ac19.zip | |
target: Allow AllRegistrants to re-RESERVE existing reservation
commit ae450e246e8540300699480a3780a420a028b73f upstream.
This patch changes core_scsi3_pro_release() logic to allow an
existing AllRegistrants type reservation to be re-reserved by
any registered I_T nexus.
This addresses a issue where AllRegistrants type RESERVE was
receiving RESERVATION_CONFLICT status if dev_pr_res_holder did
not match the same I_T nexus, instead of just returning GOOD
status following spc4r34 Section 5.9.9:
"If the device server receives a PERSISTENT RESERVE OUT command
with RESERVE service action where the TYPE field and the SCOPE
field contain the same values as the existing type and scope
from a persistent reservation holder, it shall not make any
change to the existing persistent reservation and shall complete
the command with GOOD status."
Reported-by: Ilias Tsitsimpis <i.tsitsimpis@gmail.com>
Cc: Ilias Tsitsimpis <i.tsitsimpis@gmail.com>
Cc: Lee Duncan <lduncan@suse.com>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/target/target_core_pr.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/target/target_core_pr.c b/drivers/target/target_core_pr.c index 2aab21baedc1..41a6bfaa22d8 100644 --- a/drivers/target/target_core_pr.c +++ b/drivers/target/target_core_pr.c @@ -2297,6 +2297,7 @@ core_scsi3_pro_reserve(struct se_cmd *cmd, int type, int scope, u64 res_key) spin_lock(&dev->dev_reservation_lock); pr_res_holder = dev->dev_pr_res_holder; if (pr_res_holder) { + int pr_res_type = pr_res_holder->pr_res_type; /* * From spc4r17 Section 5.7.9: Reserving: * @@ -2307,7 +2308,9 @@ core_scsi3_pro_reserve(struct se_cmd *cmd, int type, int scope, u64 res_key) * the logical unit, then the command shall be completed with * RESERVATION CONFLICT status. */ - if (pr_res_holder != pr_reg) { + if ((pr_res_holder != pr_reg) && + (pr_res_type != PR_TYPE_WRITE_EXCLUSIVE_ALLREG) && + (pr_res_type != PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; pr_err("SPC-3 PR: Attempted RESERVE from" " [%s]: %s while reservation already held by" |