Manage: be more careful about --add attempts.

[thirdparty/mdadm.git] / Manage.c

diff --git a/Manage.c b/Manage.c
index 6e9d4a03b45e76c7e3cfb71c816ade60a6a06b0d..acfec750f714b28c9570ee408380c58cb0ac8611 100644 (file)
--- a/Manage.c
+++ b/Manage.c
@@ -383,6 +383,7 @@ int Manage_subdevs(char *devname, int fd,
                char *dnprintable = dv->devname;
                char *add_dev = dv->devname;
                int err;
+               int re_add_failed = 0;
 
                next = dv->next;
                jnext = 0;
@@ -662,14 +663,20 @@ int Manage_subdevs(char *devname, int fd,
                                    get_linux_version() <= 2006018)
                                        ;
                                else if (st->sb) {
+                                       struct mdinfo mdi;
+                                       st->ss->getinfo_super(st, &mdi);
                                        st->ss->uuid_from_super(st, ouuid);
-                                       if (memcmp(duuid, ouuid, sizeof(ouuid))==0) {
-                                               /* looks close enough for now.  Kernel
-                                                * will worry about whether a bitmap
-                                                * based reconstruction is possible.
+                                       if ((mdi.disk.state & (1<<MD_DISK_ACTIVE)) &&
+                                           !(mdi.disk.state & (1<<MD_DISK_FAULTY)) &&
+                                           memcmp(duuid, ouuid, sizeof(ouuid))==0) {
+                                               /* look like it is worth a try.  Need to
+                                                * make sure kernel will accept it though.
                                                 */
-                                               struct mdinfo mdi;
-                                               st->ss->getinfo_super(st, &mdi);
+                                               disc.number = mdi.disk.number;
+                                               if (ioctl(fd, GET_DISK_INFO, &disc) != 0
+                                                   || disc.major != 0 || disc.minor != 0
+                                                   || !enough_fd(fd))
+                                                       goto skip_re_add;
                                                disc.major = major(stb.st_rdev);
                                                disc.minor = minor(stb.st_rdev);
                                                disc.number = mdi.disk.number;
@@ -684,8 +691,7 @@ int Manage_subdevs(char *devname, int fd,
                                                tfd = -1;
                                                /* don't even try if disk is marked as faulty */
                                                errno = 0;
-                                               if ((disc.state & 1) == 0 &&
-                                                   ioctl(fd, ADD_NEW_DISK, &disc) == 0) {
+                                               if (ioctl(fd, ADD_NEW_DISK, &disc) == 0) {
                                                        if (verbose >= 0)
                                                                fprintf(stderr, Name ": re-added %s\n", add_dev);
                                                        count++;
@@ -698,7 +704,8 @@ int Manage_subdevs(char *devname, int fd,
                                                                continue;
                                                        return 1;
                                                }
-                                               /* fall back on normal-add */
+                                       skip_re_add:
+                                               re_add_failed = 1;
                                        }
                                }
                                if (add_dev != dv->devname) {
@@ -720,6 +727,17 @@ int Manage_subdevs(char *devname, int fd,
                                                dv->devname, devname);
                                        return 1;
                                }
+                               if (re_add_failed) {
+                                       fprintf(stderr, Name ": %s reports being an active member for %s, but a --re-add fails.\n",
+                                               dv->devname, devname);
+                                       fprintf(stderr, Name ": not performing --add as that would convert %s in to a spare.\n",
+                                               dv->devname);
+                                       fprintf(stderr, Name ": To make this a spare, use \"mdadm --zero-superblock %s\" first.\n",     
+                                               dv->devname);
+                                       if (tfd >= 0)
+                                               close(tfd);
+                                       return 1;
+                               }
                        } else {
                                /* non-persistent. Must ensure that new drive
                                 * is at least array.size big.