From f161d4b44d7cc1dc66b53365215227db356378b1 Mon Sep 17 00:00:00 2001 From: Nicholas Bellinger Date: Wed, 11 Feb 2015 18:34:40 -0800 Subject: 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 Cc: stable@vger.kernel.org Signed-off-by: Nicholas Bellinger --- include/target/target_core_base.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/target') 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; -- cgit v1.2.3