path: root/block/blk-timeout.c
diff options
authorAkinobu Mita <akinobu.mita@gmail.com>2011-08-03 16:21:01 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-08-03 14:25:20 -1000
commitdd48c085c1cdf9446f92826f1fd451167fb6c2fd (patch)
treed62870378cc08af36ea7a41531436bdebddec232 /block/blk-timeout.c
parentf48d1915b86f06a943087e5f9b29542a1ef4cd4d (diff)
fault-injection: add ability to export fault_attr in arbitrary directory
init_fault_attr_dentries() is used to export fault_attr via debugfs. But it can only export it in debugfs root directory. Per Forlin is working on mmc_fail_request which adds support to inject data errors after a completed host transfer in MMC subsystem. The fault_attr for mmc_fail_request should be defined per mmc host and export it in debugfs directory per mmc host like /sys/kernel/debug/mmc0/mmc_fail_request. init_fault_attr_dentries() doesn't help for mmc_fail_request. So this introduces fault_create_debugfs_attr() which is able to create a directory in the arbitrary directory and replace init_fault_attr_dentries(). [akpm@linux-foundation.org: extraneous semicolon, per Randy] Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Tested-by: Per Forlin <per.forlin@linaro.org> Cc: Jens Axboe <axboe@kernel.dk> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Pekka Enberg <penberg@kernel.org> Cc: Matt Mackall <mpm@selenic.com> Cc: Randy Dunlap <rdunlap@xenotime.net> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'block/blk-timeout.c')
1 files changed, 4 insertions, 1 deletions
diff --git a/block/blk-timeout.c b/block/blk-timeout.c
index 4f0c06c7a33..78035488895 100644
--- a/block/blk-timeout.c
+++ b/block/blk-timeout.c
@@ -28,7 +28,10 @@ int blk_should_fake_timeout(struct request_queue *q)
static int __init fail_io_timeout_debugfs(void)
- return init_fault_attr_dentries(&fail_io_timeout, "fail_io_timeout");
+ struct dentry *dir = fault_create_debugfs_attr("fail_io_timeout",
+ NULL, &fail_io_timeout);
+ return IS_ERR(dir) ? PTR_ERR(dir) : 0;