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| author | Tushar Sugandhi <tusharsu@linux.microsoft.com> | 2021-08-13 23:37:59 +0200 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2021-08-20 22:07:35 +0200 |
| commit | f1cd6cb24b6b3cd95227e8016d092310a4015e96 (patch) | |
| tree | d9b72f7301b9b21ad7702244861783a21d9c84e5 /drivers/md/dm.c | |
| parent | dm ima: prefix ima event name related to device mapper with dm_ (diff) | |
| download | linux-f1cd6cb24b6b3cd95227e8016d092310a4015e96.tar.xz linux-f1cd6cb24b6b3cd95227e8016d092310a4015e96.zip | |
dm ima: add a warning in dm_init if duplicate ima events are not measured
The end-users of DM devices/targets may remove and re-create the same
device multiple times. IMA does not measure such duplicate events if the
configuration CONFIG_IMA_DISABLE_HTABLE is set to 'n'.
To avoid confusion, the end-users need some indication on the client
if that configuration option is disabled.
Add a one-time warning during dm_init() if CONFIG_IMA_DISABLE_HTABLE
is set to 'n', to notify the end-users that duplicate events will not
be measured in the ima log. Also cleanup some whitespace in dm_init().
Signed-off-by: Tushar Sugandhi <tusharsu@linux.microsoft.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md/dm.c')
| -rw-r--r-- | drivers/md/dm.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 33e55ac9ec65..84e9145b1714 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -262,9 +262,13 @@ static void (*_exits[])(void) = { static int __init dm_init(void) { const int count = ARRAY_SIZE(_inits); - int r, i; +#if (IS_ENABLED(CONFIG_IMA) && !IS_ENABLED(CONFIG_IMA_DISABLE_HTABLE)) + DMWARN("CONFIG_IMA_DISABLE_HTABLE is disabled." + " Duplicate IMA measurements will not be recorded in the IMA log."); +#endif + for (i = 0; i < count; i++) { r = _inits[i](); if (r) @@ -272,8 +276,7 @@ static int __init dm_init(void) } return 0; - - bad: +bad: while (i--) _exits[i](); |