super1

[thirdparty/mdadm.git] / super0.c

diff --git a/super0.c b/super0.c
index 4cd2cc3dc3560544b0135c4f28865d09e7f0e5e1..4cf9277cfc78e23ab0b5f60ea59334dba02fcb6f 100644 (file)
--- a/super0.c
+++ b/super0.c
@@ -322,14 +322,22 @@ static __u64 event_super0(void *sbv)
 
 
 
-static void init_super0(void **sbp, mdu_array_info_t *info)
+static int init_super0(void **sbp, mdu_array_info_t *info)
 {
        mdp_super_t *sb = malloc(MD_SB_BYTES);
+       int spares;
        memset(sb, 0, MD_SB_BYTES);
 
        if (info->major_version == -1) {
                /* zeroing the superblock */
-               return;
+               return 0;
+       }
+
+       spares = info->working_disks - info->active_disks;
+       if (info->raid_disks + spares  > MD_SB_DISKS) {
+               fprintf(stderr, Name ": too many devices requested: %d+%d > %d\n",
+                       info->raid_disks , spares, MD_SB_DISKS);
+               return 0;
        }
 
        sb->md_magic = MD_SB_MAGIC;
@@ -361,6 +369,7 @@ static void init_super0(void **sbp, mdu_array_info_t *info)
        sb->chunk_size = info->chunk_size;
 
        *sbp = sb;
+       return 1;
 }
 
 /* Add a device to the superblock being created */
@@ -409,7 +418,7 @@ static int store_super0(int fd, void *sbv)
        return 0;
 }
 
-static int write_init_super0(void *sbv, mdu_disk_info_t *dinfo, char *devname)
+static int write_init_super0(struct supertype *st, void *sbv, mdu_disk_info_t *dinfo, char *devname)
 {
        mdp_super_t *sb = sbv;
        int fd = open(devname, O_RDWR, O_EXCL);
@@ -469,7 +478,7 @@ static int compare_super0(void **firstp, void *secondv)
 }
 
 
-static int load_super0(int fd, void **sbp, char *devname)
+static int load_super0(struct supertype *st, int fd, void **sbp, char *devname)
 {
        /* try to read in the superblock
         * Return:
@@ -541,17 +550,36 @@ static int load_super0(int fd, void **sbp, char *devname)
                return 2;
        }
        *sbp = super;
+       if (st->ss == NULL) {
+               st->ss = &super0;
+               st->minor_version = 90;
+       }
+
        return 0;
 }
 
-static int match_metadata_desc0(char *arg)
+static struct supertype *match_metadata_desc0(char *arg)
 {
+       struct supertype *st = malloc(sizeof(*st));
+       if (!st) return st;
+
+       st->ss = &super0;
+       st->minor_version = 90;
        if (strcmp(arg, "0") == 0 ||
            strcmp(arg, "0.90") == 0 ||
            strcmp(arg, "default") == 0
                )
-               return 1;
-       return 0;
+               return st;
+
+       free(st);
+       return NULL;
+}
+
+static __u64 avail_size0(__u64 devsize)
+{
+       if (devsize < MD_RESERVED_SECTORS*2)
+               return 0ULL;
+       return MD_NEW_SIZE_SECTORS(devsize);
 }
 
 struct superswitch super0 = {
@@ -570,4 +598,6 @@ struct superswitch super0 = {
        .compare_super = compare_super0,
        .load_super = load_super0,
        .match_metadata_desc = match_metadata_desc0,
+       .avail_size = avail_size0,
+       .major = 0,
 };