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Check exclusive device access before probing metadata

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Signed-off-by: Adam Rutkowski <adam.j.rutkowski@intel.com>
This commit is contained in:
Adam Rutkowski 2021-01-21 13:07:41 -06:00
parent 5f65d93a36
commit 2b739d1165
1 changed files with 5 additions and 3 deletions
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8
casadm/cas_lib.c
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@ -2915,10 +2915,12 @@ int zero_md(const char *cache_device){
int fd = 0;
int result;
/* check if given cache device exists */
fd = open(cache_device, O_RDONLY);
/* check if device is available */
fd = open(cache_device, O_WRONLY | O_SYNC | O_EXCL);
if (fd < 0) {
cas_printf(LOG_ERR, "Device '%s' not found.\n", cache_device);
cas_printf(LOG_ERR, "Error while opening '%s'exclusively. This can be due to\n"
"cache instance running on this device. In such case please "
"stop the cache and try again.\n", cache_device);
return FAILURE;
}
close(fd);