diff options
Diffstat (limited to 'mdstat.c')
-rw-r--r-- | mdstat.c | 64 |
1 files changed, 60 insertions, 4 deletions
@@ -83,14 +83,41 @@ #include <sys/select.h> #include <ctype.h> +static void free_member_devnames(struct dev_member *m) +{ + while(m) { + struct dev_member *t = m; + + m = m->next; + free(t->name); + free(t); + } +} + +static void add_member_devname(struct dev_member **m, char *name) +{ + struct dev_member *new; + char *t; + + if ((t = strchr(name, '[')) == NULL) + /* not a device */ + return; + + new = malloc(sizeof(*new)); + new->name = strndup(name, t - name); + new->next = *m; + *m = new; +} + void free_mdstat(struct mdstat_ent *ms) { while (ms) { struct mdstat_ent *t; - if (ms->dev) free(ms->dev); - if (ms->level) free(ms->level); - if (ms->pattern) free(ms->pattern); - if (ms->metadata_version) free(ms->metadata_version); + free(ms->dev); + free(ms->level); + free(ms->pattern); + free(ms->metadata_version); + free_member_devnames(ms->members); t = ms; ms = ms->next; free(t); @@ -159,6 +186,7 @@ struct mdstat_ent *mdstat_read(int hold, int start) ent->raid_disks = 0; ent->chunk_size = 0; ent->devcnt = 0; + ent->members = NULL; ent->dev = strdup(line); ent->devnum = devnum; @@ -180,6 +208,7 @@ struct mdstat_ent *mdstat_read(int hold, int start) in_devs = 0; else if (in_devs) { ent->devcnt++; + add_member_devname(&ent->members, w); if (strncmp(w, "md", 2)==0) { /* This has an md device as a component. * If that device is already in the @@ -311,3 +340,30 @@ int mddev_busy(int devnum) free_mdstat(mdstat); return me != NULL; } + +struct mdstat_ent *mdstat_by_component(char *name) +{ + struct mdstat_ent *mdstat = mdstat_read(0, 0); + + while (mdstat) { + struct dev_member *m; + struct mdstat_ent *ent; + if (mdstat->metadata_version && + strncmp(mdstat->metadata_version, "external:", 9) == 0 && + is_subarray(mdstat->metadata_version+9)) + /* don't return subarrays, only containers */ + ; + else for (m = mdstat->members; m; m = m->next) { + if (strcmp(m->name, name) == 0) { + free_mdstat(mdstat->next); + mdstat->next = NULL; + return mdstat; + } + } + ent = mdstat; + mdstat = mdstat->next; + ent->next = NULL; + free_mdstat(ent); + } + return NULL; +} |