struct rb_node *n;
u64 ret = 0;
- em_tree = &fs_info->mapping_tree.map_tree;
+ em_tree = &fs_info->mapping_tree;
read_lock(&em_tree->lock);
n = rb_last(&em_tree->map.rb_root);
if (n) {
struct extent_map_tree *em_tree;
struct extent_map *em;
- em_tree = &fs_info->mapping_tree.map_tree;
+ em_tree = &fs_info->mapping_tree;
read_lock(&em_tree->lock);
em = lookup_extent_mapping(em_tree, logical, length);
read_unlock(&em_tree->lock);
u64 num_devices;
unsigned seq;
bool reducing_integrity;
+ int i;
if (btrfs_fs_closing(fs_info) ||
atomic_read(&fs_info->balance_pause_req) ||
}
num_devices = btrfs_num_devices(fs_info);
+ allowed = 0;
+ for (i = 0; i < ARRAY_SIZE(btrfs_raid_array); i++)
+ if (num_devices >= btrfs_raid_array[i].devs_min)
+ allowed |= btrfs_raid_array[i].bg_flag;
- allowed = BTRFS_AVAIL_ALLOC_BIT_SINGLE | BTRFS_BLOCK_GROUP_DUP;
- if (num_devices > 1)
- allowed |= (BTRFS_BLOCK_GROUP_RAID0 | BTRFS_BLOCK_GROUP_RAID1);
- if (num_devices > 2)
- allowed |= BTRFS_BLOCK_GROUP_RAID5;
- if (num_devices > 3)
- allowed |= (BTRFS_BLOCK_GROUP_RAID10 |
- BTRFS_BLOCK_GROUP_RAID6);
if (validate_convert_profile(&bctl->data, allowed)) {
int index = btrfs_bg_flags_to_raid_index(bctl->data.target);
goto out;
}
- /* allow to reduce meta or sys integrity only if force set */
- allowed = BTRFS_BLOCK_GROUP_DUP | BTRFS_BLOCK_GROUP_RAID1 |
- BTRFS_BLOCK_GROUP_RAID10 |
- BTRFS_BLOCK_GROUP_RAID5 |
- BTRFS_BLOCK_GROUP_RAID6;
+ /*
+ * Allow to reduce metadata or system integrity only if force set for
+ * profiles with redundancy (copies, parity)
+ */
+ allowed = 0;
+ for (i = 0; i < ARRAY_SIZE(btrfs_raid_array); i++) {
+ if (btrfs_raid_array[i].ncopies >= 2 ||
+ btrfs_raid_array[i].tolerated_failures >= 1)
+ allowed |= btrfs_raid_array[i].bg_flag;
+ }
do {
seq = read_seqbegin(&fs_info->profiles_lock);
em->block_len = em->len;
em->orig_block_len = stripe_size;
- em_tree = &info->mapping_tree.map_tree;
+ em_tree = &info->mapping_tree;
write_lock(&em_tree->lock);
ret = add_extent_mapping(em_tree, em, 0);
if (ret) {
static inline int btrfs_chunk_max_errors(struct map_lookup *map)
{
- int max_errors;
-
- if (map->type & (BTRFS_BLOCK_GROUP_RAID1 |
- BTRFS_BLOCK_GROUP_RAID10 |
- BTRFS_BLOCK_GROUP_RAID5 |
- BTRFS_BLOCK_GROUP_DUP)) {
- max_errors = 1;
- } else if (map->type & BTRFS_BLOCK_GROUP_RAID6) {
- max_errors = 2;
- } else {
- max_errors = 0;
- }
+ const int index = btrfs_bg_flags_to_raid_index(map->type);
- return max_errors;
+ return btrfs_raid_array[index].tolerated_failures;
}
int btrfs_chunk_readonly(struct btrfs_fs_info *fs_info, u64 chunk_offset)
return readonly;
}
-void btrfs_mapping_init(struct btrfs_mapping_tree *tree)
-{
- extent_map_tree_init(&tree->map_tree);
-}
-
-void btrfs_mapping_tree_free(struct btrfs_mapping_tree *tree)
+void btrfs_mapping_tree_free(struct extent_map_tree *tree)
{
struct extent_map *em;
while (1) {
- write_lock(&tree->map_tree.lock);
- em = lookup_extent_mapping(&tree->map_tree, 0, (u64)-1);
+ write_lock(&tree->lock);
+ em = lookup_extent_mapping(tree, 0, (u64)-1);
if (em)
- remove_extent_mapping(&tree->map_tree, em);
- write_unlock(&tree->map_tree.lock);
+ remove_extent_mapping(tree, em);
+ write_unlock(&tree->lock);
if (!em)
break;
/* once for us */
struct btrfs_chunk *chunk)
{
struct btrfs_fs_info *fs_info = leaf->fs_info;
- struct btrfs_mapping_tree *map_tree = &fs_info->mapping_tree;
+ struct extent_map_tree *map_tree = &fs_info->mapping_tree;
struct map_lookup *map;
struct extent_map *em;
u64 logical;
return ret;
}
- read_lock(&map_tree->map_tree.lock);
- em = lookup_extent_mapping(&map_tree->map_tree, logical, 1);
- read_unlock(&map_tree->map_tree.lock);
+ read_lock(&map_tree->lock);
+ em = lookup_extent_mapping(map_tree, logical, 1);
+ read_unlock(&map_tree->lock);
/* already mapped? */
if (em && em->start <= logical && em->start + em->len > logical) {
}
- write_lock(&map_tree->map_tree.lock);
- ret = add_extent_mapping(&map_tree->map_tree, em, 0);
- write_unlock(&map_tree->map_tree.lock);
+ write_lock(&map_tree->lock);
+ ret = add_extent_mapping(map_tree, em, 0);
+ write_unlock(&map_tree->lock);
if (ret < 0) {
btrfs_err(fs_info,
"failed to add chunk map, start=%llu len=%llu: %d",
bool btrfs_check_rw_degradable(struct btrfs_fs_info *fs_info,
struct btrfs_device *failing_dev)
{
- struct btrfs_mapping_tree *map_tree = &fs_info->mapping_tree;
+ struct extent_map_tree *map_tree = &fs_info->mapping_tree;
struct extent_map *em;
u64 next_start = 0;
bool ret = true;
- read_lock(&map_tree->map_tree.lock);
- em = lookup_extent_mapping(&map_tree->map_tree, 0, (u64)-1);
- read_unlock(&map_tree->map_tree.lock);
+ read_lock(&map_tree->lock);
+ em = lookup_extent_mapping(map_tree, 0, (u64)-1);
+ read_unlock(&map_tree->lock);
/* No chunk at all? Return false anyway */
if (!em) {
ret = false;
next_start = extent_map_end(em);
free_extent_map(em);
- read_lock(&map_tree->map_tree.lock);
- em = lookup_extent_mapping(&map_tree->map_tree, next_start,
+ read_lock(&map_tree->lock);
+ em = lookup_extent_mapping(map_tree, next_start,
(u64)(-1) - next_start);
- read_unlock(&map_tree->map_tree.lock);
+ read_unlock(&map_tree->lock);
}
out:
return ret;
u64 chunk_offset, u64 devid,
u64 physical_offset, u64 physical_len)
{
- struct extent_map_tree *em_tree = &fs_info->mapping_tree.map_tree;
+ struct extent_map_tree *em_tree = &fs_info->mapping_tree;
struct extent_map *em;
struct map_lookup *map;
struct btrfs_device *dev;
static int verify_chunk_dev_extent_mapping(struct btrfs_fs_info *fs_info)
{
- struct extent_map_tree *em_tree = &fs_info->mapping_tree.map_tree;
+ struct extent_map_tree *em_tree = &fs_info->mapping_tree;
struct extent_map *em;
struct rb_node *node;
int ret = 0;