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authorNicholas Bellinger <nab@linux-iscsi.org>2015-02-11 18:34:40 -0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-03-18 13:31:24 +0100
commitbdbd61e1743a95ca06e86c79c9f59cdbded7ae7f (patch)
treedcdebe62fade20cdb9515e99746b7386f1f8d05f /include
parent0d0acab9f72ef6432e0d020c29705b7f46567188 (diff)
target: Fix PR_APTPL_BUF_LEN buffer size limitation
commit f161d4b44d7cc1dc66b53365215227db356378b1 upstream. 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> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
-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 1772fadcff62..349325404add 100644
--- a/include/target/target_core_base.h
+++ b/include/target/target_core_base.h
@@ -407,7 +407,7 @@ 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;