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authorNicholas Bellinger <nab@linux-iscsi.org>2015-02-12 05:34:40 +0300
committerNicholas Bellinger <nab@linux-iscsi.org>2015-02-12 23:24:12 +0300
commitf161d4b44d7cc1dc66b53365215227db356378b1 (patch)
treefc7a5791374458619b4cd7aa8de799927de84617 /include/target
parent3fd7b60f2c7418239d586e359e0c6d8503e10646 (diff)
downloadlinux-f161d4b44d7cc1dc66b53365215227db356378b1.tar.xz
target: Fix PR_APTPL_BUF_LEN buffer size limitation
This patch addresses the original PR_APTPL_BUF_LEN = 8k limitiation for write-out of PR APTPL metadata that Martin has recently been running into. It changes core_scsi3_update_and_write_aptpl() to use vzalloc'ed memory instead of kzalloc, and increases the default hardcoded length to 256k. It also adds logic in core_scsi3_update_and_write_aptpl() to double the original length upon core_scsi3_update_aptpl_buf() failure, and retries until the vzalloc'ed buffer is large enough to accommodate the outgoing APTPL metadata. Reported-by: Martin Svec <martin.svec@zoner.cz> Cc: stable@vger.kernel.org Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'include/target')
-rw-r--r--include/target/target_core_base.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h
index 397fb635766a..eec07656eb03 100644
--- a/include/target/target_core_base.h
+++ b/include/target/target_core_base.h
@@ -409,7 +409,7 @@ struct t10_reservation {
/* Activate Persistence across Target Power Loss enabled
* for SCSI device */
int pr_aptpl_active;
-#define PR_APTPL_BUF_LEN 8192
+#define PR_APTPL_BUF_LEN 262144
u32 pr_generation;
spinlock_t registration_lock;
spinlock_t aptpl_reg_lock;