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authorBoaz Harrosh <bharrosh@panasas.com>2011-08-10 14:15:02 -0700
committerBoaz Harrosh <bharrosh@panasas.com>2011-10-03 17:07:51 +0200
commit8d2d83a8352b0f9c1da82c36f741722f2960feea (patch)
tree4a96539dce29c654def762d502b41da8de7cbce7 /fs/exofs/super.c
parent5bf696dad4beecb6174e701c97e1f2574e6a2c96 (diff)
exofs: Remove unused data_map member from exofs_sb_info
The struct pnfs_osd_data_map data_map member of exofs_sb_info was never used after mount. In fact all it's members were duplicated by the ore_layout structure. So just remove the duplicated information. Also removed some stupid, but perfectly supported, restrictions on layout parameters. The case where num_devices is not divisible by mirror_count+1 is perfectly fine since the rotating device view will eventually use all the devices it can get. Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> Signed-off-by: Benny Halevy <bhalevy@tonian.com>
Diffstat (limited to 'fs/exofs/super.c')
-rw-r--r--fs/exofs/super.c57
1 files changed, 22 insertions, 35 deletions
diff --git a/fs/exofs/super.c b/fs/exofs/super.c
index babb1958f6f..90b4c526939 100644
--- a/fs/exofs/super.c
+++ b/fs/exofs/super.c
@@ -481,64 +481,51 @@ static int _read_and_match_data_map(struct exofs_sb_info *sbi, unsigned numdevs,
{
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 =
+ sbi->layout.stripe_unit =
le64_to_cpu(dt->dt_data_map.cb_stripe_unit);
- sbi->data_map.odm_group_width =
+ sbi->layout.group_width =
le32_to_cpu(dt->dt_data_map.cb_group_width);
- sbi->data_map.odm_group_depth =
+ sbi->layout.group_depth =
le32_to_cpu(dt->dt_data_map.cb_group_depth);
- sbi->data_map.odm_mirror_cnt =
- le32_to_cpu(dt->dt_data_map.cb_mirror_cnt);
- sbi->data_map.odm_raid_algorithm =
+ sbi->layout.mirrors_p1 =
+ le32_to_cpu(dt->dt_data_map.cb_mirror_cnt) + 1;
+ sbi->layout.raid_algorithm =
le32_to_cpu(dt->dt_data_map.cb_raid_algorithm);
/* FIXME: Only raid0 for now. if not so, do not mount */
- 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) {
+ if (sbi->layout.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);
+ if (numdevs < (sbi->layout.group_width * sbi->layout.mirrors_p1)) {
+ EXOFS_ERR("Data Map wrong, "
+ "numdevs=%d < group_width=%d * mirrors=%d\n",
+ numdevs, sbi->layout.group_width,
+ sbi->layout.mirrors_p1);
return -EINVAL;
}
- if (0 != (sbi->data_map.odm_stripe_unit & ~PAGE_MASK)) {
+ if (0 != (sbi->layout.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);
+ _LLU(sbi->layout.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;
-
- if (sbi->data_map.odm_group_width) {
- sbi->layout.group_width = sbi->data_map.odm_group_width;
- sbi->layout.group_depth = sbi->data_map.odm_group_depth;
+ if (sbi->layout.group_width) {
if (!sbi->layout.group_depth) {
EXOFS_ERR("group_depth == 0 && group_width != 0\n");
return -EINVAL;
}
- sbi->layout.group_count = sbi->data_map.odm_num_comps /
- sbi->layout.mirrors_p1 /
- sbi->data_map.odm_group_width;
+ sbi->layout.group_count = numdevs / sbi->layout.mirrors_p1 /
+ sbi->layout.group_width;
} else {
- if (sbi->data_map.odm_group_depth) {
+ if (sbi->layout.group_depth) {
printk(KERN_NOTICE "Warning: group_depth ignored "
- "group_width == 0 && group_depth == %d\n",
- sbi->data_map.odm_group_depth);
- sbi->data_map.odm_group_depth = 0;
+ "group_width == 0 && group_depth == %lld\n",
+ _LLU(sbi->layout.group_depth));
}
- sbi->layout.group_width = sbi->data_map.odm_num_comps /
- sbi->layout.mirrors_p1;
+ sbi->layout.group_width = numdevs / sbi->layout.mirrors_p1;
sbi->layout.group_depth = -1;
sbi->layout.group_count = 1;
}
@@ -558,7 +545,7 @@ static int _read_and_match_data_map(struct exofs_sb_info *sbi, unsigned numdevs,
sbi->layout.group_width,
_LLU(sbi->layout.group_depth),
sbi->layout.mirrors_p1,
- sbi->data_map.odm_raid_algorithm);
+ sbi->layout.raid_algorithm);
return 0;
}