path: root/block/blk-core.c
diff options
authorAkinobu Mita <>2011-08-03 16:21:01 -0700
committerLinus Torvalds <>2011-08-03 14:25:20 -1000
commitdd48c085c1cdf9446f92826f1fd451167fb6c2fd (patch)
treed62870378cc08af36ea7a41531436bdebddec232 /block/blk-core.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(). [ extraneous semicolon, per Randy] Signed-off-by: Akinobu Mita <> Tested-by: Per Forlin <> Cc: Jens Axboe <> Cc: Christoph Lameter <> Cc: Pekka Enberg <> Cc: Matt Mackall <> Cc: Randy Dunlap <> Cc: Stephen Rothwell <> Signed-off-by: Andrew Morton <> Signed-off-by: Linus Torvalds <>
Diffstat (limited to 'block/blk-core.c')
1 files changed, 4 insertions, 2 deletions
diff --git a/block/blk-core.c b/block/blk-core.c
index b850bedad229..b627558c461f 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -1368,8 +1368,10 @@ static bool should_fail_request(struct hd_struct *part, unsigned int bytes)
static int __init fail_make_request_debugfs(void)
- return init_fault_attr_dentries(&fail_make_request,
- "fail_make_request");
+ struct dentry *dir = fault_create_debugfs_attr("fail_make_request",
+ NULL, &fail_make_request);
+ return IS_ERR(dir) ? PTR_ERR(dir) : 0;