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dissect: yield for 2ms when a verity device cannot be opened before retrying

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If we don't succeed on the first try it's because another process is
opening the same device. Do a microsleep for 2ms to increase the
chances it has completed the next time around the loop.
This commit is contained in:
Luca Boccassi 2020-08-10 11:22:30 +01:00
parent 9ecb5c10fd
commit ecab4c470c
1 changed files with 3 additions and 0 deletions
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3
src/shared/dissect-image.c
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@ -1475,6 +1475,9 @@ static int verity_partition(
} }
if (r == 0) if (r == 0)
break; break;
/* Device is being opened by another process, but it has not finished yet, yield for 2ms */
(void) usleep(2 * USEC_PER_MSEC);
} }
/* An existing verity device was reported by libcryptsetup/libdevmapper, but we can't use it at this time. /* An existing verity device was reported by libcryptsetup/libdevmapper, but we can't use it at this time.