From c3e06a66f4ec2ed72015b3f6496fa62e3c3acf12 Mon Sep 17 00:00:00 2001 From: Lee Susman Date: Mon, 22 Sep 2014 17:48:44 +0300 Subject: [PATCH] block: test-iosched: expose sector_range variable to user Expose "sector_range", which will indicate to the low-level driver unit-tests the size (in sectors, starting from "start_sector") of the address space in which they can perform I/O operations. This user-defined variable can be used to change the address space size from the default 512MiB. Change-Id: I515a6849eb39b78e653f4018993a2c8e64e2a77f Signed-off-by: Lee Susman --- block/test-iosched.c | 8 ++++++++ include/linux/test-iosched.h | 6 ++++++ 2 files changed, 14 insertions(+) diff --git a/block/test-iosched.c b/block/test-iosched.c index 0aad3747de75..15ac86a409bd 100644 --- a/block/test-iosched.c +++ b/block/test-iosched.c @@ -911,6 +911,14 @@ static int test_debugfs_init(struct test_iosched *tios) if (!tios->debug.start_sector) goto err; + tios->debug.sector_range = debugfs_create_u32( + "sector_range", + S_IRUGO | S_IWUGO, + tios->debug.debug_utils_root, + &tios->sector_range); + if (!tios->debug.sector_range) + goto err; + return 0; err: diff --git a/include/linux/test-iosched.h b/include/linux/test-iosched.h index 82c0ffdf3834..98146e4a0fe1 100644 --- a/include/linux/test-iosched.h +++ b/include/linux/test-iosched.h @@ -80,6 +80,8 @@ enum req_unique_type { * @debug_test_result: Exposes the test result to the user * space * @start_sector: The start sector for read/write requests + * @sector_range: Range of the test, starting from start_sector + * (in sectors) */ struct test_debug { struct dentry *debug_root; @@ -87,6 +89,7 @@ struct test_debug { struct dentry *debug_tests_root; struct dentry *debug_test_result; struct dentry *start_sector; + struct dentry *sector_range; }; /** @@ -193,6 +196,8 @@ struct blk_dev_test_type { * new BIOs. * @start_sector: The address of the first sector that can * be accessed by the test + * @sector_range: Range of the test, starting from start_sector + * (in sectors) * @wr_rd_next_req_id: A unique ID to identify WRITE/READ * request to ease the debugging of the * test cases @@ -226,6 +231,7 @@ struct test_iosched { struct request_queue *req_q; int num_of_write_bios; u32 start_sector; + u32 sector_range; int wr_rd_next_req_id; int unique_next_req_id; spinlock_t lock;