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Btrfs: add get_restripe_target() helper

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Add get_restripe_target() helper and switch everybody to use it.

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Ilya Dryomov 2012-03-27 17:09:17 +03:00
parent 0c460c0d70
commit fc67c45083
1 changed files with 50 additions and 44 deletions
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94
fs/btrfs/extent-tree.c
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@ -3109,6 +3109,35 @@ static void set_avail_alloc_bits(struct btrfs_fs_info *fs_info, u64 flags)
fs_info->avail_system_alloc_bits |= extra_flags;
}
/*
* returns target flags in extended format or 0 if restripe for this
* chunk_type is not in progress
*/
static u64 get_restripe_target(struct btrfs_fs_info *fs_info, u64 flags)
{
struct btrfs_balance_control *bctl = fs_info->balance_ctl;
u64 target = 0;
BUG_ON(!mutex_is_locked(&fs_info->volume_mutex) &&
!spin_is_locked(&fs_info->balance_lock));
if (!bctl)
return 0;
if (flags & BTRFS_BLOCK_GROUP_DATA &&
bctl->data.flags & BTRFS_BALANCE_ARGS_CONVERT) {
target = BTRFS_BLOCK_GROUP_DATA | bctl->data.target;
} else if (flags & BTRFS_BLOCK_GROUP_SYSTEM &&
bctl->sys.flags & BTRFS_BALANCE_ARGS_CONVERT) {
target = BTRFS_BLOCK_GROUP_SYSTEM | bctl->sys.target;
} else if (flags & BTRFS_BLOCK_GROUP_METADATA &&
bctl->meta.flags & BTRFS_BALANCE_ARGS_CONVERT) {
target = BTRFS_BLOCK_GROUP_METADATA | bctl->meta.target;
}
return target;
}
/*
* @flags: available profiles in extended format (see ctree.h)
*
@ -3125,31 +3154,19 @@ u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags)
*/
u64 num_devices = root->fs_info->fs_devices->rw_devices +
root->fs_info->fs_devices->missing_devices;
u64 target;
/* pick restriper's target profile if it's available */
/*
* see if restripe for this chunk_type is in progress, if so
* try to reduce to the target profile
*/
spin_lock(&root->fs_info->balance_lock);
if (root->fs_info->balance_ctl) {
struct btrfs_balance_control *bctl = root->fs_info->balance_ctl;
u64 tgt = 0;
if ((flags & BTRFS_BLOCK_GROUP_DATA) &&
(bctl->data.flags & BTRFS_BALANCE_ARGS_CONVERT) &&
(flags & bctl->data.target)) {
tgt = BTRFS_BLOCK_GROUP_DATA | bctl->data.target;
} else if ((flags & BTRFS_BLOCK_GROUP_SYSTEM) &&
(bctl->sys.flags & BTRFS_BALANCE_ARGS_CONVERT) &&
(flags & bctl->sys.target)) {
tgt = BTRFS_BLOCK_GROUP_SYSTEM | bctl->sys.target;
} else if ((flags & BTRFS_BLOCK_GROUP_METADATA) &&
(bctl->meta.flags & BTRFS_BALANCE_ARGS_CONVERT) &&
(flags & bctl->meta.target)) {
tgt = BTRFS_BLOCK_GROUP_METADATA | bctl->meta.target;
}
if (tgt) {
target = get_restripe_target(root->fs_info, flags);
if (target) {
/* pick target profile only if it's already available */
if ((flags & target) & BTRFS_EXTENDED_PROFILE_MASK) {
spin_unlock(&root->fs_info->balance_lock);
flags = tgt;
goto out;
return extended_to_chunk(target);
}
}
spin_unlock(&root->fs_info->balance_lock);
@ -3177,7 +3194,6 @@ u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags)
flags &= ~BTRFS_BLOCK_GROUP_RAID0;
}
out:
return extended_to_chunk(flags);
}
@ -6888,28 +6904,15 @@ int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
static u64 update_block_group_flags(struct btrfs_root *root, u64 flags)
{
u64 num_devices;
u64 stripped = BTRFS_BLOCK_GROUP_RAID0 |
BTRFS_BLOCK_GROUP_RAID1 | BTRFS_BLOCK_GROUP_RAID10;
u64 stripped;
if (root->fs_info->balance_ctl) {
struct btrfs_balance_control *bctl = root->fs_info->balance_ctl;
u64 tgt = 0;
/* pick restriper's target profile and return */
if (flags & BTRFS_BLOCK_GROUP_DATA &&
bctl->data.flags & BTRFS_BALANCE_ARGS_CONVERT) {
tgt = BTRFS_BLOCK_GROUP_DATA | bctl->data.target;
} else if (flags & BTRFS_BLOCK_GROUP_SYSTEM &&
bctl->sys.flags & BTRFS_BALANCE_ARGS_CONVERT) {
tgt = BTRFS_BLOCK_GROUP_SYSTEM | bctl->sys.target;
} else if (flags & BTRFS_BLOCK_GROUP_METADATA &&
bctl->meta.flags & BTRFS_BALANCE_ARGS_CONVERT) {
tgt = BTRFS_BLOCK_GROUP_METADATA | bctl->meta.target;
}
if (tgt)
return extended_to_chunk(tgt);
}
/*
* if restripe for this chunk_type is on pick target profile and
* return, otherwise do the usual balance
*/
stripped = get_restripe_target(root->fs_info, flags);
if (stripped)
return extended_to_chunk(stripped);
/*
* we add in the count of missing devices because we want
@ -6919,6 +6922,9 @@ static u64 update_block_group_flags(struct btrfs_root *root, u64 flags)
num_devices = root->fs_info->fs_devices->rw_devices +
root->fs_info->fs_devices->missing_devices;
stripped = BTRFS_BLOCK_GROUP_RAID0 |
BTRFS_BLOCK_GROUP_RAID1 | BTRFS_BLOCK_GROUP_RAID10;
if (num_devices == 1) {
stripped |= BTRFS_BLOCK_GROUP_DUP;
stripped = flags & ~stripped;