search for: for_cow

...tic inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag) { @@ -2445,6 +2462,19 @@ struct extent_buffer *btrfs_alloc_free_b struct btrfs_root *root, u32 blocksize, u64 parent, u64 root_objectid, struct btrfs_disk_key *key, int level, + u64 hint, u64 empty_size, int for_cow); +int btrfs_cater_blocks_free(struct btrfs_root *root, u64 start, u64 len, + u8 factor, u8 index); +struct extent_buffer *btrfs_grab_cater_block(struct btrfs_trans_handle *trans, + struct btrfs_root *root, struct extent_buffer *buf, + u64 parent, u64 root_objectid, + struct btrfs_d...

....c index da7419e..858ef02 100644 --- a/fs/btrfs/delayed-ref.c +++ b/fs/btrfs/delayed-ref.c @@ -662,9 +662,12 @@ int btrfs_add_delayed_tree_ref(struct btrfs_fs_info *fs_info, add_delayed_tree_ref(fs_info, trans, &ref->node, bytenr, num_bytes, parent, ref_root, level, action, for_cow); - if (!need_ref_seq(for_cow, ref_root) && - waitqueue_active(&fs_info->tree_mod_seq_wait)) - wake_up(&fs_info->tree_mod_seq_wait); + if (!need_ref_seq(for_cow, ref_root)) { + smp_mb(); + if (waitqueue_active(&fs_info->tree_mod_seq_wait)) + wake_up(&fs_inf...

This is a first draft of a subvolume quota implementation. It is possible to limit subvolumes and any group of subvolumes and also to track the amount of space that will get freed when deleting snapshots. The current version is functionally incomplete, with the main missing feature being the initial scan and rescan of an existing filesystem. I put some effort into writing an introduction into