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7f4fc93d47
linux/drivers/md/bcache
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Tang Junhui 7f4fc93d47 bcache: return attach error when no cache set exist 
I attach a back-end device to a cache set, and the cache set is not
registered yet, this back-end device did not attach successfully, and no
error returned:
[root]# echo 87859280-fec6-4bcc-20df7ca8f86b > /sys/block/sde/bcache/attach
[root]#

In sysfs_attach(), the return value "v" is initialized to "size" in
the beginning, and if no cache set exist in bch_cache_sets, the "v" value
would not change any more, and return to sysfs, sysfs regard it as success
since the "size" is a positive number.

This patch fixes this issue by assigning "v" with "-ENOENT" in the
initialization.

Signed-off-by: Tang Junhui <tang.junhui@zte.com.cn>
Reviewed-by: Michael Lyle <mlyle@lyle.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-02-07 12:50:01 -07:00
..
alloc.c bcache: properly set task state in bch_writeback_thread() 2018-02-07 12:50:01 -07:00
bcache.h bcache: set error_limit correctly 2018-02-07 12:50:01 -07:00
bset.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
bset.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
btree.c bcache: fix for allocator and register thread race 2018-02-07 12:50:01 -07:00
btree.h Merge branch 'for-4.15/block' of git://git.kernel.dk/linux-block 2017-11-14 15:32:19 -08:00
closure.c bcache: mark closure_sync() __sched 2018-01-08 13:29:00 -07:00
closure.h bcache: closures: move control bits one bit right 2018-01-09 12:18:51 -07:00
debug.c bcache: fix wrong return value in bch_debug_init() 2018-01-08 13:29:00 -07:00
debug.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
extents.c bcache: Fix building error on MIPS 2017-11-24 16:22:58 -07:00
extents.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
io.c bcache: fix misleading error message in bch_count_io_errors() 2018-01-08 13:29:00 -07:00
journal.c bcache: fix high CPU occupancy during journal 2018-02-07 12:50:01 -07:00
journal.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
Kconfig bcache: Kill dead cgroup code 2014-03-18 12:22:35 -07:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
movinggc.c block: move bio_alloc_pages() to bcache 2018-01-06 09:18:00 -07:00
request.c bcache: fix unmatched generic_end_io_acct() & generic_start_io_acct() 2018-01-08 13:29:00 -07:00
request.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
stats.c md: Convert timers to use timer_setup() 2017-11-14 20:11:57 -07:00
stats.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
super.c bcache: fix for allocator and register thread race 2018-02-07 12:50:01 -07:00
sysfs.c bcache: return attach error when no cache set exist 2018-02-07 12:50:01 -07:00
sysfs.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
trace.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
util.c block: move bio_alloc_pages() to bcache 2018-01-06 09:18:00 -07:00
util.h bcache: fix high CPU occupancy during journal 2018-02-07 12:50:01 -07:00
writeback.c bcache: set writeback_rate_update_seconds in range [1, 60] seconds 2018-02-07 12:50:01 -07:00
writeback.h bcache: set writeback_rate_update_seconds in range [1, 60] seconds 2018-02-07 12:50:01 -07:00