diff options
Diffstat (limited to 'drivers/md/raid5-cache.c')
-rw-r--r-- | drivers/md/raid5-cache.c | 26 |
1 files changed, 16 insertions, 10 deletions
diff --git a/drivers/md/raid5-cache.c b/drivers/md/raid5-cache.c index f73672b0a702..33fc85015147 100644 --- a/drivers/md/raid5-cache.c +++ b/drivers/md/raid5-cache.c @@ -441,7 +441,6 @@ int r5l_write_stripe(struct r5l_log *log, struct stripe_head *sh) { int write_disks = 0; int data_pages, parity_pages; - int meta_size; int reserve; int i; int ret = 0; @@ -473,15 +472,6 @@ int r5l_write_stripe(struct r5l_log *log, struct stripe_head *sh) parity_pages = 1 + !!(sh->qd_idx >= 0); data_pages = write_disks - parity_pages; - meta_size = - ((sizeof(struct r5l_payload_data_parity) + sizeof(__le32)) - * data_pages) + - sizeof(struct r5l_payload_data_parity) + - sizeof(__le32) * parity_pages; - /* Doesn't work with very big raid array */ - if (meta_size + sizeof(struct r5l_meta_block) > PAGE_SIZE) - return -EINVAL; - set_bit(STRIPE_LOG_TRAPPED, &sh->state); /* * The stripe must enter state machine again to finish the write, so @@ -1197,6 +1187,22 @@ int r5l_init_log(struct r5conf *conf, struct md_rdev *rdev) if (PAGE_SIZE != 4096) return -EINVAL; + + /* + * The PAGE_SIZE must be big enough to hold 1 r5l_meta_block and + * raid_disks r5l_payload_data_parity. + * + * Write journal and cache does not work for very big array + * (raid_disks > 203) + */ + if (sizeof(struct r5l_meta_block) + + ((sizeof(struct r5l_payload_data_parity) + sizeof(__le32)) * + conf->raid_disks) > PAGE_SIZE) { + pr_err("md/raid:%s: write journal/cache doesn't work for array with %d disks\n", + mdname(conf->mddev), conf->raid_disks); + return -EINVAL; + } + log = kzalloc(sizeof(*log), GFP_KERNEL); if (!log) return -ENOMEM; |