From 9c9d1b4f74c5e96779e561af9b57c65607bf8a6d Mon Sep 17 00:00:00 2001 From: Filipe Manana Date: Mon, 19 Sep 2022 15:06:32 +0100 Subject: [PATCH] btrfs: move open coded extent map tree deletion out of inode eviction Move the loop that removes all the extent maps from the inode's extent map tree during inode eviction out of inode.c and into extent_map.c, to btrfs_drop_extent_map_range(). Anything manipulating extent maps or the extent map tree should be in extent_map.c. Signed-off-by: Filipe Manana Signed-off-by: David Sterba --- fs/btrfs/extent_map.c | 27 +++++++++++++++++++++++++++ fs/btrfs/inode.c | 15 +-------------- 2 files changed, 28 insertions(+), 14 deletions(-) diff --git a/fs/btrfs/extent_map.c b/fs/btrfs/extent_map.c index 28c5e02..7376c0a 100644 --- a/fs/btrfs/extent_map.c +++ b/fs/btrfs/extent_map.c @@ -661,6 +661,29 @@ int btrfs_add_extent_mapping(struct btrfs_fs_info *fs_info, } /* + * Drop all extent maps from a tree in the fastest possible way, rescheduling + * if needed. This avoids searching the tree, from the root down to the first + * extent map, before each deletion. + */ +static void drop_all_extent_maps_fast(struct extent_map_tree *tree) +{ + write_lock(&tree->lock); + while (!RB_EMPTY_ROOT(&tree->map.rb_root)) { + struct extent_map *em; + struct rb_node *node; + + node = rb_first_cached(&tree->map); + em = rb_entry(node, struct extent_map, rb_node); + clear_bit(EXTENT_FLAG_PINNED, &em->flags); + clear_bit(EXTENT_FLAG_LOGGING, &em->flags); + remove_extent_mapping(tree, em); + free_extent_map(em); + cond_resched_rwlock_write(&tree->lock); + } + write_unlock(&tree->lock); +} + +/* * Drop all extent maps in a given range. * * @inode: The target inode. @@ -685,6 +708,10 @@ void btrfs_drop_extent_map_range(struct btrfs_inode *inode, u64 start, u64 end, WARN_ON(end < start); if (end == (u64)-1) { + if (start == 0 && !skip_pinned) { + drop_all_extent_maps_fast(em_tree); + return; + } len = (u64)-1; testend = false; } diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 491c2b7..cbf920e 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -5289,25 +5289,12 @@ static int btrfs_setattr(struct user_namespace *mnt_userns, struct dentry *dentr static void evict_inode_truncate_pages(struct inode *inode) { struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree; - struct extent_map_tree *map_tree = &BTRFS_I(inode)->extent_tree; struct rb_node *node; ASSERT(inode->i_state & I_FREEING); truncate_inode_pages_final(&inode->i_data); - write_lock(&map_tree->lock); - while (!RB_EMPTY_ROOT(&map_tree->map.rb_root)) { - struct extent_map *em; - - node = rb_first_cached(&map_tree->map); - em = rb_entry(node, struct extent_map, rb_node); - clear_bit(EXTENT_FLAG_PINNED, &em->flags); - clear_bit(EXTENT_FLAG_LOGGING, &em->flags); - remove_extent_mapping(map_tree, em); - free_extent_map(em); - cond_resched_rwlock_write(&map_tree->lock); - } - write_unlock(&map_tree->lock); + btrfs_drop_extent_map_range(BTRFS_I(inode), 0, (u64)-1, false); /* * Keep looping until we have no more ranges in the io tree. -- 2.7.4