[PATCH v4 6/9] btrfs: support different disk extent size for delalloc
From: Omar Sandoval <osandov@osandov.com>
Date: 2020-02-28 23:14:32
Also in:
linux-btrfs, linux-fsdevel
Subsystem:
btrfs file system, filesystems (vfs and infrastructure), the rest · Maintainers:
Chris Mason, David Sterba, Alexander Viro, Christian Brauner, Linus Torvalds
From: Omar Sandoval <redacted> Currently, we always reserve the same extent size in the file and extent size on disk for delalloc because the former is the worst case for the latter. For RWF_ENCODED writes, we know the exact size of the extent on disk, which may be less than or greater than (for bookends) the size in the file. Add a disk_num_bytes parameter to btrfs_delalloc_reserve_metadata() so that we can reserve the correct amount of csum bytes. Additionally, make btrfs_free_reserve_data_space_noquota() take a number of bytes instead of a range, as it refers to the extent size on disk, not in the file. No functional change. Reviewed-by: Nikolay Borisov <redacted> Signed-off-by: Omar Sandoval <redacted> --- fs/btrfs/ctree.h | 3 ++- fs/btrfs/delalloc-space.c | 38 +++++++++++++++++--------------------- fs/btrfs/delalloc-space.h | 4 ++-- fs/btrfs/file.c | 3 ++- fs/btrfs/inode.c | 7 ++----- fs/btrfs/relocation.c | 4 ++-- 6 files changed, 27 insertions(+), 32 deletions(-)
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index d97983ab94fe..72d7c249179d 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h@@ -2540,7 +2540,8 @@ void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info, struct btrfs_block_rsv *rsv); void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes); -int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes); +int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes, + u64 disk_num_bytes); u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo); int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info, u64 start, u64 end);
diff --git a/fs/btrfs/delalloc-space.c b/fs/btrfs/delalloc-space.c
index 4cdac4d834f5..7c4dfa76b8d6 100644
--- a/fs/btrfs/delalloc-space.c
+++ b/fs/btrfs/delalloc-space.c@@ -153,34 +153,28 @@ int btrfs_check_data_free_space(struct inode *inode, /* Use new btrfs_qgroup_reserve_data to reserve precious data space. */ ret = btrfs_qgroup_reserve_data(inode, reserved, start, len); if (ret < 0) - btrfs_free_reserved_data_space_noquota(inode, start, len); + btrfs_free_reserved_data_space_noquota(fs_info, len); else ret = 0; return ret; } /* - * Called if we need to clear a data reservation for this inode - * Normally in a error case. + * Called if we need to clear a data reservation, normally in an error case. * * This one will *NOT* use accurate qgroup reserved space API, just for case * which we can't sleep and is sure it won't affect qgroup reserved space. * Like clear_bit_hook(). */ -void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start, - u64 len) +void btrfs_free_reserved_data_space_noquota(struct btrfs_fs_info *fs_info, + u64 num_bytes) { - struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb); struct btrfs_space_info *data_sinfo; - /* Make sure the range is aligned to sectorsize */ - len = round_up(start + len, fs_info->sectorsize) - - round_down(start, fs_info->sectorsize); - start = round_down(start, fs_info->sectorsize); - + num_bytes = ALIGN(num_bytes, fs_info->sectorsize); data_sinfo = fs_info->data_sinfo; spin_lock(&data_sinfo->lock); - btrfs_space_info_update_bytes_may_use(fs_info, data_sinfo, -len); + btrfs_space_info_update_bytes_may_use(fs_info, data_sinfo, -num_bytes); spin_unlock(&data_sinfo->lock); }
@@ -201,7 +195,7 @@ void btrfs_free_reserved_data_space(struct inode *inode, round_down(start, root->fs_info->sectorsize); start = round_down(start, root->fs_info->sectorsize); - btrfs_free_reserved_data_space_noquota(inode, start, len); + btrfs_free_reserved_data_space_noquota(root->fs_info, len); btrfs_qgroup_free_data(inode, reserved, start, len); }
@@ -280,11 +274,11 @@ static void btrfs_calculate_inode_block_rsv_size(struct btrfs_fs_info *fs_info, } static void calc_inode_reservations(struct btrfs_fs_info *fs_info, - u64 num_bytes, u64 *meta_reserve, - u64 *qgroup_reserve) + u64 num_bytes, u64 disk_num_bytes, + u64 *meta_reserve, u64 *qgroup_reserve) { u64 nr_extents = count_max_extents(num_bytes); - u64 csum_leaves = btrfs_csum_bytes_to_leaves(fs_info, num_bytes); + u64 csum_leaves = btrfs_csum_bytes_to_leaves(fs_info, disk_num_bytes); u64 inode_update = btrfs_calc_metadata_size(fs_info, 1); *meta_reserve = btrfs_calc_insert_metadata_size(fs_info,
@@ -298,7 +292,8 @@ static void calc_inode_reservations(struct btrfs_fs_info *fs_info, *qgroup_reserve = nr_extents * fs_info->nodesize; } -int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes) +int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes, + u64 disk_num_bytes) { struct btrfs_root *root = inode->root; struct btrfs_fs_info *fs_info = root->fs_info;
@@ -328,6 +323,7 @@ int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes) } num_bytes = ALIGN(num_bytes, fs_info->sectorsize); + disk_num_bytes = ALIGN(disk_num_bytes, fs_info->sectorsize); /* * We always want to do it this way, every other way is wrong and ends
@@ -339,8 +335,8 @@ int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes) * everything out and try again, which is bad. This way we just * over-reserve slightly, and clean up the mess when we are done. */ - calc_inode_reservations(fs_info, num_bytes, &meta_reserve, - &qgroup_reserve); + calc_inode_reservations(fs_info, num_bytes, disk_num_bytes, + &meta_reserve, &qgroup_reserve); ret = btrfs_qgroup_reserve_meta_prealloc(root, qgroup_reserve, true); if (ret) return ret;
@@ -359,7 +355,7 @@ int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes) spin_lock(&inode->lock); nr_extents = count_max_extents(num_bytes); btrfs_mod_outstanding_extents(inode, nr_extents); - inode->csum_bytes += num_bytes; + inode->csum_bytes += disk_num_bytes; btrfs_calculate_inode_block_rsv_size(fs_info, inode); spin_unlock(&inode->lock);
@@ -463,7 +459,7 @@ int btrfs_delalloc_reserve_space(struct inode *inode, ret = btrfs_check_data_free_space(inode, reserved, start, len); if (ret < 0) return ret; - ret = btrfs_delalloc_reserve_metadata(BTRFS_I(inode), len); + ret = btrfs_delalloc_reserve_metadata(BTRFS_I(inode), len, len); if (ret < 0) btrfs_free_reserved_data_space(inode, *reserved, start, len); return ret;
diff --git a/fs/btrfs/delalloc-space.h b/fs/btrfs/delalloc-space.h
index 54466fbd7075..f847f0a80409 100644
--- a/fs/btrfs/delalloc-space.h
+++ b/fs/btrfs/delalloc-space.h@@ -13,8 +13,8 @@ void btrfs_free_reserved_data_space(struct inode *inode, void btrfs_delalloc_release_space(struct inode *inode, struct extent_changeset *reserved, u64 start, u64 len, bool qgroup_free); -void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start, - u64 len); +void btrfs_free_reserved_data_space_noquota(struct btrfs_fs_info *fs_info, + u64 num_bytes); void btrfs_delalloc_release_metadata(struct btrfs_inode *inode, u64 num_bytes, bool qgroup_free); int btrfs_delalloc_reserve_space(struct inode *inode,
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index a16da274c9aa..bf862f59b2a8 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c@@ -1667,7 +1667,8 @@ static noinline ssize_t btrfs_buffered_write(struct kiocb *iocb, WARN_ON(reserve_bytes == 0); ret = btrfs_delalloc_reserve_metadata(BTRFS_I(inode), - reserve_bytes); + reserve_bytes, + reserve_bytes); if (ret) { if (!only_release_metadata) btrfs_free_reserved_data_space(inode,
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 0d5b4e14f815..bcde9903d13b 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c@@ -2000,9 +2000,7 @@ void btrfs_clear_delalloc_extent(struct inode *vfs_inode, if (root->root_key.objectid != BTRFS_DATA_RELOC_TREE_OBJECTID && do_list && !(state->state & EXTENT_NORESERVE) && (*bits & EXTENT_CLEAR_DATA_RESV)) - btrfs_free_reserved_data_space_noquota( - &inode->vfs_inode, - state->start, len); + btrfs_free_reserved_data_space_noquota(fs_info, len); percpu_counter_add_batch(&fs_info->delalloc_bytes, -len, fs_info->delalloc_batch);
@@ -7168,8 +7166,7 @@ static int btrfs_get_blocks_direct_write(struct extent_map **map, * use the existing or preallocated extent, so does not * need to adjust btrfs_space_info's bytes_may_use. */ - btrfs_free_reserved_data_space_noquota(inode, start, - len); + btrfs_free_reserved_data_space_noquota(fs_info, len); goto skip_cow; } }
diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c
index 995d4b8b1cfd..5316245a065e 100644
--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c@@ -3300,8 +3300,8 @@ static int relocate_file_extent_cluster(struct inode *inode, index = (cluster->start - offset) >> PAGE_SHIFT; last_index = (cluster->end - offset) >> PAGE_SHIFT; while (index <= last_index) { - ret = btrfs_delalloc_reserve_metadata(BTRFS_I(inode), - PAGE_SIZE); + ret = btrfs_delalloc_reserve_metadata(BTRFS_I(inode), PAGE_SIZE, + PAGE_SIZE); if (ret) goto out;
--
2.25.1