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Assemble: block attempts to reassemble container members 

Attempting to open(O_EXCL) each candidate device usually filters out all
busy raid components.  However, containers do not behave like components
and will return container_content that may describe active member
arrays.

This patch just adds a function that will be used to check if a
container member is busy.  It will be used shortly.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
Dan Williams 2008-11-04 20:51:12 +11:00 committed by NeilBrown
parent 6234c63ccc
commit 2de8884f0f
1 changed files with 25 additions and 0 deletions
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25
Assemble.c
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@ -50,6 +50,31 @@ static int name_matches(char *found, char *required, char *homehost)
return 0;
}
/*static */ int is_member_busy(char *metadata_version)
{
/* check if the given member array is active */
struct mdstat_ent *mdstat = mdstat_read(1, 0);
struct mdstat_ent *ent;
int busy = 0;
for (ent = mdstat; ent; ent = ent->next) {
if (ent->metadata_version == NULL)
continue;
if (strncmp(ent->metadata_version, "external:", 9) != 0)
continue;
if (!is_subarray(&ent->metadata_version[9]))
continue;
/* Skip first char - it can be '/' or '-' */
if (strcmp(&ent->metadata_version[10], metadata_version+1) == 0) {
busy = 1;
break;
}
}
free_mdstat(mdstat);
return busy;
}
int Assemble(struct supertype *st, char *mddev,
mddev_ident_t ident,
mddev_dev_t devlist, char *backup_file,