*/
/* /var/run/mdadm.map is used to track arrays being created in --incremental
- * more. It particularly allows lookup from UUID to array device, but
+ * mode. It particularly allows lookup from UUID to array device, but
* also allows the array device name to be easily found.
*
* The map file is line based with space separated fields. The fields are:
* However /var/run may not exist or be writable in early boot. And if
* no-one has created /var/run/mdadm, we still want to survive.
* So possible locations are:
- * /var/run/mdadm/map /var/run/mdadm.map /dev/.mdadm.map
- * the last, because udev requires a writable /dev very early.
+ * /var/run/mdadm/map /var/run/mdadm.map /lib/initrw/madam/map
+ * The last can easily be change at compile to e.g. somewhere in /dev.
* We read from the first one that exists and write to the first
* one that we can.
*/
#include <sys/file.h>
#include <ctype.h>
-#define mapnames(base) { #base, #base ".new", #base ".lock"}
-char *mapname[3][3] = {
- mapnames(/var/run/mdadm/map),
- mapnames(/var/run/mdadm.map),
- mapnames(/dev/.mdadm.map)
+#define mapnames(base) { base, base ".new", base ".lock"}
+char *mapname[2][3] = {
+ mapnames(MAP_DIR "/" MAP_FILE),
+ mapnames("/var/run/mdadm.map")
};
+char *mapdir[2] = { MAP_DIR, NULL };
-int mapmode[3] = { O_RDONLY, O_RDWR|O_CREAT, O_RDWR|O_CREAT | O_TRUNC };
+int mapmode[3] = { O_RDONLY, O_RDWR|O_CREAT, O_RDWR|O_CREAT|O_TRUNC };
char *mapsmode[3] = { "r", "w", "w"};
FILE *open_map(int modenum, int *choice)
{
int i;
- for (i = 0 ; i < 3 ; i++) {
- int fd = open(mapname[i][modenum], mapmode[modenum], 0600);
+
+ for (i = 0 ; i < 2 ; i++) {
+ int fd;
+ if ((mapmode[modenum] & O_CREAT) && mapdir[i])
+ /* Attempt to create directory, don't worry about
+ * failure.
+ */
+ mkdir(mapdir[i], 0755);
+ fd = open(mapname[i][modenum], mapmode[modenum], 0600);
if (fd >= 0) {
*choice = i;
return fdopen(fd, mapsmode[modenum]);
}
}
+void map_remove(struct map_ent **mapp, int devnum)
+{
+ if (devnum == NoMdDev)
+ return;
+
+ map_delete(mapp, devnum);
+ map_write(*mapp);
+ map_free(*mapp);
+}
+
struct map_ent *map_by_uuid(struct map_ent **map, int uuid[4])
{
struct map_ent *mp;
}
for (md = mdstat ; md ; md = md->next) {
- struct mdinfo *sra = sysfs_read(-1, md->devnum, GET_DEVS|SKIP_GONE_DEVS);
+ struct mdinfo *sra = sysfs_read(-1, md->devnum, GET_DEVS);
struct mdinfo *sd;
if (!sra)
}
sysfs_free(sra);
}
- map_write(map);
+ /* Only trigger a change if we wrote a new map file */
+ if (map_write(map))
+ for (md = mdstat ; md ; md = md->next) {
+ struct mdinfo *sra = sysfs_read(-1, md->devnum,
+ GET_VERSION);
+ if (sra)
+ sysfs_uevent(sra, "change");
+ sysfs_free(sra);
+ }
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);
}