diff options
Diffstat (limited to 'fs/exofs/super.c')
| -rw-r--r-- | fs/exofs/super.c | 52 |
1 files changed, 45 insertions, 7 deletions
diff --git a/fs/exofs/super.c b/fs/exofs/super.c index fc8875186ae8..8f4e4b37a578 100644 --- a/fs/exofs/super.c +++ b/fs/exofs/super.c @@ -308,6 +308,8 @@ static void exofs_put_super(struct super_block *sb) static int _read_and_match_data_map(struct exofs_sb_info *sbi, unsigned numdevs, struct exofs_device_table *dt) { + u64 stripe_length; + sbi->data_map.odm_num_comps = le32_to_cpu(dt->dt_data_map.cb_num_comps); sbi->data_map.odm_stripe_unit = @@ -321,14 +323,47 @@ static int _read_and_match_data_map(struct exofs_sb_info *sbi, unsigned numdevs, sbi->data_map.odm_raid_algorithm = le32_to_cpu(dt->dt_data_map.cb_raid_algorithm); -/* FIXME: Hard coded mirror only for now. if not so do not mount */ - if ((sbi->data_map.odm_num_comps != numdevs) || - (sbi->data_map.odm_stripe_unit != EXOFS_BLKSIZE) || - (sbi->data_map.odm_raid_algorithm != PNFS_OSD_RAID_0) || - (sbi->data_map.odm_mirror_cnt != (numdevs - 1))) +/* FIXME: Only raid0 !group_width/depth for now. if not so, do not mount */ + if (sbi->data_map.odm_group_width || sbi->data_map.odm_group_depth) { + EXOFS_ERR("Group width/depth not supported\n"); return -EINVAL; - else - return 0; + } + if (sbi->data_map.odm_num_comps != numdevs) { + EXOFS_ERR("odm_num_comps(%u) != numdevs(%u)\n", + sbi->data_map.odm_num_comps, numdevs); + return -EINVAL; + } + if (sbi->data_map.odm_raid_algorithm != PNFS_OSD_RAID_0) { + EXOFS_ERR("Only RAID_0 for now\n"); + return -EINVAL; + } + if (0 != (numdevs % (sbi->data_map.odm_mirror_cnt + 1))) { + EXOFS_ERR("Data Map wrong, numdevs=%d mirrors=%d\n", + numdevs, sbi->data_map.odm_mirror_cnt); + return -EINVAL; + } + + stripe_length = sbi->data_map.odm_stripe_unit * + (numdevs / (sbi->data_map.odm_mirror_cnt + 1)); + if (stripe_length >= (1ULL << 32)) { + EXOFS_ERR("Total Stripe length(0x%llx)" + " >= 32bit is not supported\n", _LLU(stripe_length)); + return -EINVAL; + } + + if (0 != (sbi->data_map.odm_stripe_unit & ~PAGE_MASK)) { + EXOFS_ERR("Stripe Unit(0x%llx)" + " must be Multples of PAGE_SIZE(0x%lx)\n", + _LLU(sbi->data_map.odm_stripe_unit), PAGE_SIZE); + return -EINVAL; + } + + sbi->layout.stripe_unit = sbi->data_map.odm_stripe_unit; + sbi->layout.mirrors_p1 = sbi->data_map.odm_mirror_cnt + 1; + sbi->layout.group_width = sbi->data_map.odm_num_comps / + sbi->layout.mirrors_p1; + + return 0; } /* @odi is valid only as long as @fscb_dev is valid */ @@ -502,6 +537,9 @@ static int exofs_fill_super(struct super_block *sb, void *data, int silent) } /* Default layout in case we do not have a device-table */ + sbi->layout.stripe_unit = PAGE_SIZE; + sbi->layout.mirrors_p1 = 1; + sbi->layout.group_width = 1; sbi->layout.s_ods[0] = od; sbi->layout.s_numdevs = 1; sbi->layout.s_pid = opts->pid; |