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authorIlya Dryomov <idryomov@gmail.com>2012-01-16 21:04:49 +0100
committerIlya Dryomov <idryomov@gmail.com>2012-01-16 21:04:49 +0100
commit837d5b6e46d1a4af5b6cc8f2fe83cb5de79a2961 (patch)
tree4ef87d05240e90480749c345274a83094caf66f0 /fs/btrfs/ctree.h
parentBtrfs: add skip_balance mount option (diff)
downloadlinux-837d5b6e46d1a4af5b6cc8f2fe83cb5de79a2961.tar.xz
linux-837d5b6e46d1a4af5b6cc8f2fe83cb5de79a2961.zip
Btrfs: allow for pausing restriper
Implement an ioctl for pausing restriper. This pauses the relocation, but balance is still considered to be "in progress": balance item is not deleted, other volume operations cannot be started, etc. If paused in the middle of profile changing operation we will continue making allocations with the target profile. Add a hook to close_ctree() to pause restriper and free its data structures on unmount. (It's safe to unmount when restriper is in "paused" state, we will resume with the same parameters on the next mount) Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'fs/btrfs/ctree.h')
-rw-r--r--fs/btrfs/ctree.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 99eb2bcd9aa7..1afda75d5414 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -1214,7 +1214,10 @@ struct btrfs_fs_info {
/* restriper state */
spinlock_t balance_lock;
struct mutex balance_mutex;
+ atomic_t balance_running;
+ atomic_t balance_pause_req;
struct btrfs_balance_control *balance_ctl;
+ wait_queue_head_t balance_wait_q;
unsigned data_chunk_allocations;
unsigned metadata_ratio;
@@ -2658,6 +2661,7 @@ static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
}
static inline void free_fs_info(struct btrfs_fs_info *fs_info)
{
+ kfree(fs_info->balance_ctl);
kfree(fs_info->delayed_root);
kfree(fs_info->extent_root);
kfree(fs_info->tree_root);