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| author | David Howells <dhowells@redhat.com> | 2020-01-14 18:07:11 +0100 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2020-05-19 16:38:07 +0200 |
| commit | f5b5a164f9a11aab5b225f082b33a8f03c07516c (patch) | |
| tree | 2e8495c9715765006985d2309312bcf2db0f462d /samples/Makefile | |
| parent | watch_queue: Add a key/keyring notification facility (diff) | |
| download | linux-f5b5a164f9a11aab5b225f082b33a8f03c07516c.tar.xz linux-f5b5a164f9a11aab5b225f082b33a8f03c07516c.zip | |
Add sample notification program
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>
Diffstat (limited to 'samples/Makefile')
| -rw-r--r-- | samples/Makefile | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/samples/Makefile b/samples/Makefile index f8f847b4f61f..8617edf7f19a 100644 --- a/samples/Makefile +++ b/samples/Makefile @@ -24,3 +24,4 @@ obj-$(CONFIG_VIDEO_PCI_SKELETON) += v4l/ obj-y += vfio-mdev/ subdir-$(CONFIG_SAMPLE_VFS) += vfs obj-$(CONFIG_SAMPLE_INTEL_MEI) += mei/ +subdir-$(CONFIG_SAMPLE_WATCH_QUEUE) += watch_queue |