* also allows the array device name to be easily found.
*
* The map file is line based with space separated fields. The fields are:
- * Device id - mdX or mdpX where is a number.
- * metadata - 0.90 1.0 1.1 1.2
+ * Device id - mdX or mdpX where X is a number.
+ * metadata - 0.90 1.0 1.1 1.2 ddf ...
* UUID - uuid of the array
* path - path where device created: /dev/md/home
*
f = fopen("/var/run/mdadm/map.new", "w");
if (!f) {
f = fopen("/var/run/mdadm.map.new", "w");
- subdir = 1;
+ subdir = 0;
}
if (!f)
return 0;
- while (mel) {
+ for (; mel; mel = mel->next) {
+ if (mel->bad)
+ continue;
if (mel->devnum < 0)
fprintf(f, "mdp%d ", -1-mel->devnum);
else
fprintf(f, "md%d ", mel->devnum);
- fprintf(f, "%d.%d ", mel->major, mel->minor);
+ fprintf(f, "%s ", mel->metadata);
fprintf(f, "%08x:%08x:%08x:%08x ", mel->uuid[0],
mel->uuid[1], mel->uuid[2], mel->uuid[3]);
fprintf(f, "%s\n", mel->path);
- mel = mel->next;
}
fflush(f);
err = ferror(f);
"/var/run/mdadm.map") == 0;
}
+
+static int lfd = -1;
+static int lsubdir = 0;
+int map_lock(struct map_ent **melp)
+{
+ if (lfd < 0) {
+ lfd = open("/var/run/mdadm/map.lock", O_CREAT|O_RDWR, 0600);
+ if (lfd < 0) {
+ lfd = open("/var/run/mdadm.map.lock", O_CREAT|O_RDWR, 0600);
+ lsubdir = 0;
+ } else
+ lsubdir = 1;
+ if (lfd < 0)
+ return -1;
+ if (lockf(lfd, F_LOCK, 0) != 0) {
+ close(lfd);
+ lfd = -1;
+ return -1;
+ }
+ }
+ if (*melp)
+ map_free(*melp);
+ map_read(melp);
+ return 0;
+}
+
+void map_unlock(struct map_ent **melp)
+{
+ if (lfd >= 0)
+ close(lfd);
+ if (lsubdir)
+ unlink("/var/run/mdadm/map.lock");
+ else
+ unlink("/var/run/mdadm.map.lock");
+ lfd = -1;
+}
+
void map_add(struct map_ent **melp,
- int devnum, int major, int minor, int uuid[4], char *path)
+ int devnum, char *metadata, int uuid[4], char *path)
{
struct map_ent *me = malloc(sizeof(*me));
me->devnum = devnum;
- me->major = major;
- me->minor = minor;
+ strcpy(me->metadata, metadata);
memcpy(me->uuid, uuid, 16);
me->path = strdup(path);
me->next = *melp;
+ me->bad = 0;
*melp = me;
}
FILE *f;
char buf[8192];
char path[200];
- int devnum, major, minor, uuid[4];
+ int devnum, uuid[4];
+ char metadata[30];
char nam[4];
*melp = NULL;
f = fopen("/var/run/mdadm/map", "r");
+ if (!f)
+ f = fopen("/var/run/mdadm.map", "r");
+ if (!f) {
+ RebuildMap();
+ f = fopen("/var/run/mdadm/map", "r");
+ }
if (!f)
f = fopen("/var/run/mdadm.map", "r");
if (!f)
return;
while (fgets(buf, sizeof(buf), f)) {
- if (sscanf(buf, " md%1[p]%d %d.%d %x:%x:%x:%x %200s",
- nam, &devnum, &major, &minor, uuid, uuid+1,
- uuid+2, uuid+3, path) == 9) {
- if (nam[0] == 'p')
+ if (sscanf(buf, " %3[mdp]%d %s %x:%x:%x:%x %200s",
+ nam, &devnum, metadata, uuid, uuid+1,
+ uuid+2, uuid+3, path) == 8) {
+ if (strncmp(nam, "md", 2) != 0)
+ continue;
+ if (nam[2] == 'p')
devnum = -1 - devnum;
- map_add(melp, devnum, major, minor, uuid, path);
+ map_add(melp, devnum, metadata, uuid, path);
}
}
fclose(f);
}
}
-int map_update(struct map_ent **mpp, int devnum, int major, int minor,
+int map_update(struct map_ent **mpp, int devnum, char *metadata,
int *uuid, char *path)
{
struct map_ent *map, *mp;
for (mp = map ; mp ; mp=mp->next)
if (mp->devnum == devnum) {
- mp->major = major;
- mp->minor = minor;
+ strcpy(mp->metadata, metadata);
memcpy(mp->uuid, uuid, 16);
free(mp->path);
mp->path = strdup(path);
break;
}
if (!mp)
- map_add(&map, devnum, major, minor, uuid, path);
- *mpp = NULL;
+ map_add(&map, devnum, metadata, uuid, path);
+ if (mpp)
+ *mpp = NULL;
rv = map_write(map);
map_free(map);
return rv;
if (!*map)
map_read(map);
- for (mp = *map ; mp ; mp = mp->next)
- if (memcmp(uuid, mp->uuid, 16) == 0)
- return mp;
+ for (mp = *map ; mp ; mp = mp->next) {
+ if (memcmp(uuid, mp->uuid, 16) != 0)
+ continue;
+ if (!mddev_busy(mp->devnum)) {
+ mp->bad = 1;
+ continue;
+ }
+ return mp;
+ }
+ return NULL;
+}
+
+struct map_ent *map_by_devnum(struct map_ent **map, int devnum)
+{
+ struct map_ent *mp;
+ if (!*map)
+ map_read(map);
+
+ for (mp = *map ; mp ; mp = mp->next) {
+ if (mp->devnum != devnum)
+ continue;
+ if (!mddev_busy(mp->devnum)) {
+ mp->bad = 1;
+ continue;
+ }
+ return mp;
+ }
+ return NULL;
+}
+
+struct map_ent *map_by_name(struct map_ent **map, char *name)
+{
+ struct map_ent *mp;
+ if (!*map)
+ map_read(map);
+
+ for (mp = *map ; mp ; mp = mp->next) {
+ if (strncmp(mp->path, "/dev/md/", 8) != 0)
+ continue;
+ if (strcmp(mp->path+8, name) != 0)
+ continue;
+ if (!mddev_busy(mp->devnum)) {
+ mp->bad = 1;
+ continue;
+ }
+ return mp;
+ }
return NULL;
+}
+
+void RebuildMap(void)
+{
+ struct mdstat_ent *mdstat = mdstat_read(0, 0);
+ struct mdstat_ent *md;
+ struct map_ent *map = NULL;
+ int mdp = get_mdp_major();
+
+ for (md = mdstat ; md ; md = md->next) {
+ struct mdinfo *sra = sysfs_read(-1, md->devnum, GET_DEVS|SKIP_GONE_DEVS);
+ struct mdinfo *sd;
+
+ if (!sra)
+ continue;
+ for (sd = sra->devs ; sd ; sd = sd->next) {
+ char dn[30];
+ int dfd;
+ int ok;
+ struct supertype *st;
+ char *path;
+ struct mdinfo info;
+
+ sprintf(dn, "%d:%d", sd->disk.major, sd->disk.minor);
+ dfd = dev_open(dn, O_RDONLY);
+ if (dfd < 0)
+ continue;
+ st = guess_super(dfd);
+ if ( st == NULL)
+ ok = -1;
+ else
+ ok = st->ss->load_super(st, dfd, NULL);
+ close(dfd);
+ if (ok != 0)
+ continue;
+ st->ss->getinfo_super(st, &info);
+ if (md->devnum > 0)
+ path = map_dev(MD_MAJOR, md->devnum, 0);
+ else
+ path = map_dev(mdp, (-1-md->devnum)<< 6, 0);
+ map_add(&map, md->devnum,
+ info.text_version,
+ info.uuid, path ? : "/unknown");
+ st->ss->free_super(st);
+ break;
+ }
+ sysfs_free(sra);
+ }
+ map_write(map);
+ map_free(map);
+ for (md = mdstat ; md ; md = md->next) {
+ struct mdinfo *sra = sysfs_read(-1, md->devnum, GET_VERSION);
+ sysfs_uevent(sra, "change");
+ sysfs_free(sra);
+ }
+ free_mdstat(mdstat);
}
projects / thirdparty / mdadm.git / blobdiff