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New superblock fields for multiple cache devices

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This commit is contained in:
Kent Overstreet 2011-04-15 13:22:09 -07:00
parent 0b4b6fe2d3
commit 1a7ae034f6
2 changed files with 6 additions and 1 deletions
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5
bcache.h
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@ -18,8 +18,11 @@ struct cache_sb {
uint64_t nbuckets; /* device size */
uint64_t btree_root;
uint16_t btree_level;
uint16_t _pad[3];
uint16_t nr_in_set;
uint16_t nr_this_dev;
uint16_t _pad[1];
uint8_t uuid[16];
uint8_t set_uuid[16];
};
struct bucket_disk {

2
make-bcache.c
View File

@ -76,6 +76,7 @@ int main(int argc, char **argv)
struct cache_sb sb = { .block_size = 8, .bucket_size = 0 };
uuid_generate(sb.uuid);
uuid_generate(sb.set_uuid);
while ((c = getopt(argc, argv, "CBU:w:b:")) != -1)
switch (c) {
@ -129,6 +130,7 @@ int main(int argc, char **argv)
memcpy(sb.magic, bcache_magic, 16);
sb.version = backingdev ? CACHE_BACKING_DEVICE : 0;
sb.nbuckets = nblocks / sb.bucket_size;
sb.nr_in_set = 1;
uuid_unparse(sb.uuid, uuid);
do