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SubjectRe: [RFC PATCH 07/14] Add sample notification program [ver #3]
On Wed, Jan 15, 2020 at 01:31:38PM +0000, David Howells wrote:
> The sample program is run like:
>
> ./samples/watch_queue/watch_test
>
> and watches "/" for mount changes and the current session keyring for key
> changes:
>
> # keyctl add user a a @s
> 1035096409
> # keyctl unlink 1035096409 @s
>
> producing:
>
> # ./watch_test
> read() = 16
> NOTIFY[000]: ty=000001 sy=02 i=00000110
> KEY 2ffc2e5d change=2[linked] aux=1035096409
> read() = 16
> NOTIFY[000]: ty=000001 sy=02 i=00000110
> KEY 2ffc2e5d change=3[unlinked] aux=1035096409
>
> Other events may be produced, such as with a failing disk:
>
> read() = 22
> NOTIFY[000]: ty=000003 sy=02 i=00000416
> USB 3-7.7 dev-reset e=0 r=0
> read() = 24
> NOTIFY[000]: ty=000002 sy=06 i=00000418
> BLOCK 00800050 e=6[critical medium] s=64000ef8
>
> This corresponds to:
>
> blk_update_request: critical medium error, dev sdf, sector 1677725432 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
>
> in dmesg.
>
> Signed-off-by: David Howells <dhowells@redhat.com>

mips:allmodconfig:

samples/watch_queue/watch_test.c: In function ‘keyctl_watch_key’:
samples/watch_queue/watch_test.c:34:17: error: ‘__NR_keyctl’ undeclared

Guenter

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