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Diffstat (limited to 'fs/btrfs/inode.c')
-rw-r--r--fs/btrfs/inode.c154
1 files changed, 120 insertions, 34 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index d267eb5caa7b..320d1062068d 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -28,6 +28,7 @@
#include <linux/magic.h>
#include <linux/iversion.h>
#include <linux/swap.h>
+#include <linux/migrate.h>
#include <linux/sched/mm.h>
#include <asm/unaligned.h>
#include "misc.h"
@@ -242,6 +243,15 @@ static int insert_inline_extent(struct btrfs_trans_handle *trans,
btrfs_release_path(path);
/*
+ * We align size to sectorsize for inline extents just for simplicity
+ * sake.
+ */
+ size = ALIGN(size, root->fs_info->sectorsize);
+ ret = btrfs_inode_set_file_extent_range(BTRFS_I(inode), start, size);
+ if (ret)
+ goto fail;
+
+ /*
* we're an inline extent, so nobody can
* extend the file past i_size without locking
* a page we already have locked.
@@ -2446,6 +2456,11 @@ static int insert_reserved_file_extent(struct btrfs_trans_handle *trans,
ins.offset = disk_num_bytes;
ins.type = BTRFS_EXTENT_ITEM_KEY;
+ ret = btrfs_inode_set_file_extent_range(BTRFS_I(inode), file_pos,
+ ram_bytes);
+ if (ret)
+ goto out;
+
/*
* Release the reserved range from inode dirty range map, as it is
* already moved into delayed_ref_head
@@ -2536,7 +2551,7 @@ static int btrfs_finish_ordered_io(struct btrfs_ordered_extent *ordered_extent)
*/
btrfs_qgroup_free_data(inode, NULL, start,
ordered_extent->num_bytes);
- btrfs_ordered_update_i_size(inode, 0, ordered_extent);
+ btrfs_inode_safe_disk_i_size_write(inode, 0);
if (freespace_inode)
trans = btrfs_join_transaction_spacecache(root);
else
@@ -2607,7 +2622,7 @@ static int btrfs_finish_ordered_io(struct btrfs_ordered_extent *ordered_extent)
goto out;
}
- btrfs_ordered_update_i_size(inode, 0, ordered_extent);
+ btrfs_inode_safe_disk_i_size_write(inode, 0);
ret = btrfs_update_inode_fallback(trans, root, inode);
if (ret) { /* -ENOMEM or corruption */
btrfs_abort_transaction(trans, ret);
@@ -3187,6 +3202,8 @@ static int btrfs_read_locked_inode(struct inode *inode,
i_uid_write(inode, btrfs_inode_uid(leaf, inode_item));
i_gid_write(inode, btrfs_inode_gid(leaf, inode_item));
btrfs_i_size_write(BTRFS_I(inode), btrfs_inode_size(leaf, inode_item));
+ btrfs_inode_set_file_extent_range(BTRFS_I(inode), 0,
+ round_up(i_size_read(inode), fs_info->sectorsize));
inode->i_atime.tv_sec = btrfs_timespec_sec(leaf, &inode_item->atime);
inode->i_atime.tv_nsec = btrfs_timespec_nsec(leaf, &inode_item->atime);
@@ -4158,6 +4175,8 @@ search_again:
}
while (1) {
+ u64 clear_start = 0, clear_len = 0;
+
fi = NULL;
leaf = path->nodes[0];
btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0]);
@@ -4208,6 +4227,8 @@ search_again:
if (extent_type != BTRFS_FILE_EXTENT_INLINE) {
u64 num_dec;
+
+ clear_start = found_key.offset;
extent_start = btrfs_file_extent_disk_bytenr(leaf, fi);
if (!del_item) {
u64 orig_num_bytes =
@@ -4215,6 +4236,7 @@ search_again:
extent_num_bytes = ALIGN(new_size -
found_key.offset,
fs_info->sectorsize);
+ clear_start = ALIGN(new_size, fs_info->sectorsize);
btrfs_set_file_extent_num_bytes(leaf, fi,
extent_num_bytes);
num_dec = (orig_num_bytes -
@@ -4240,6 +4262,7 @@ search_again:
inode_sub_bytes(inode, num_dec);
}
}
+ clear_len = num_dec;
} else if (extent_type == BTRFS_FILE_EXTENT_INLINE) {
/*
* we can't truncate inline items that have had
@@ -4261,12 +4284,33 @@ search_again:
*/
ret = NEED_TRUNCATE_BLOCK;
break;
+ } else {
+ /*
+ * Inline extents are special, we just treat
+ * them as a full sector worth in the file
+ * extent tree just for simplicity sake.
+ */
+ clear_len = fs_info->sectorsize;
}
if (test_bit(BTRFS_ROOT_REF_COWS, &root->state))
inode_sub_bytes(inode, item_end + 1 - new_size);
}
delete:
+ /*
+ * We use btrfs_truncate_inode_items() to clean up log trees for
+ * multiple fsyncs, and in this case we don't want to clear the
+ * file extent range because it's just the log.
+ */
+ if (root == BTRFS_I(inode)->root) {
+ ret = btrfs_inode_clear_file_extent_range(BTRFS_I(inode),
+ clear_start, clear_len);
+ if (ret) {
+ btrfs_abort_transaction(trans, ret);
+ break;
+ }
+ }
+
if (del_item)
last_size = found_key.offset;
else
@@ -4368,7 +4412,7 @@ out:
ASSERT(last_size >= new_size);
if (!ret && last_size > new_size)
last_size = new_size;
- btrfs_ordered_update_i_size(inode, last_size, NULL);
+ btrfs_inode_safe_disk_i_size_write(inode, last_size);
unlock_extent_cached(&BTRFS_I(inode)->io_tree, lock_start,
(u64)-1, &cached_state);
}
@@ -4576,7 +4620,7 @@ int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size)
if (size <= hole_start)
return 0;
- btrfs_lock_and_flush_ordered_range(io_tree, BTRFS_I(inode), hole_start,
+ btrfs_lock_and_flush_ordered_range(BTRFS_I(inode), hole_start,
block_end - 1, &cached_state);
cur_offset = hole_start;
while (1) {
@@ -4589,14 +4633,21 @@ int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size)
}
last_byte = min(extent_map_end(em), block_end);
last_byte = ALIGN(last_byte, fs_info->sectorsize);
+ hole_size = last_byte - cur_offset;
+
if (!test_bit(EXTENT_FLAG_PREALLOC, &em->flags)) {
struct extent_map *hole_em;
- hole_size = last_byte - cur_offset;
err = maybe_insert_hole(root, inode, cur_offset,
hole_size);
if (err)
break;
+
+ err = btrfs_inode_set_file_extent_range(BTRFS_I(inode),
+ cur_offset, hole_size);
+ if (err)
+ break;
+
btrfs_drop_extent_cache(BTRFS_I(inode), cur_offset,
cur_offset + hole_size - 1, 0);
hole_em = alloc_extent_map();
@@ -4628,6 +4679,11 @@ int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size)
hole_size - 1, 0);
}
free_extent_map(hole_em);
+ } else {
+ err = btrfs_inode_set_file_extent_range(BTRFS_I(inode),
+ cur_offset, hole_size);
+ if (err)
+ break;
}
next:
free_extent_map(em);
@@ -4671,24 +4727,24 @@ static int btrfs_setsize(struct inode *inode, struct iattr *attr)
* truncation, it must capture all writes that happened before
* this truncation.
*/
- btrfs_wait_for_snapshot_creation(root);
+ btrfs_drew_write_lock(&root->snapshot_lock);
ret = btrfs_cont_expand(inode, oldsize, newsize);
if (ret) {
- btrfs_end_write_no_snapshotting(root);
+ btrfs_drew_write_unlock(&root->snapshot_lock);
return ret;
}
trans = btrfs_start_transaction(root, 1);
if (IS_ERR(trans)) {
- btrfs_end_write_no_snapshotting(root);
+ btrfs_drew_write_unlock(&root->snapshot_lock);
return PTR_ERR(trans);
}
i_size_write(inode, newsize);
- btrfs_ordered_update_i_size(inode, i_size_read(inode), NULL);
+ btrfs_inode_safe_disk_i_size_write(inode, 0);
pagecache_isize_extended(inode, oldsize, newsize);
ret = btrfs_update_inode(trans, root, inode);
- btrfs_end_write_no_snapshotting(root);
+ btrfs_drew_write_unlock(&root->snapshot_lock);
btrfs_end_transaction(trans);
} else {
@@ -5098,7 +5154,7 @@ static int fixup_tree_root_location(struct btrfs_fs_info *fs_info,
btrfs_release_path(path);
- new_root = btrfs_read_fs_root_no_name(fs_info, location);
+ new_root = btrfs_get_fs_root(fs_info, location, true);
if (IS_ERR(new_root)) {
err = PTR_ERR(new_root);
goto out;
@@ -5179,7 +5235,8 @@ static int btrfs_init_locked_inode(struct inode *inode, void *p)
inode->i_ino = args->location->objectid;
memcpy(&BTRFS_I(inode)->location, args->location,
sizeof(*args->location));
- BTRFS_I(inode)->root = args->root;
+ BTRFS_I(inode)->root = btrfs_grab_root(args->root);
+ BUG_ON(args->root && !BTRFS_I(inode)->root);
return 0;
}
@@ -5260,7 +5317,7 @@ static struct inode *new_simple_dir(struct super_block *s,
if (!inode)
return ERR_PTR(-ENOMEM);
- BTRFS_I(inode)->root = root;
+ BTRFS_I(inode)->root = btrfs_grab_root(root);
memcpy(&BTRFS_I(inode)->location, key, sizeof(*key));
set_bit(BTRFS_INODE_DUMMY, &BTRFS_I(inode)->runtime_flags);
@@ -5307,7 +5364,6 @@ struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry)
struct btrfs_root *sub_root = root;
struct btrfs_key location;
u8 di_type = 0;
- int index;
int ret = 0;
if (dentry->d_name.len > BTRFS_NAME_LEN)
@@ -5334,7 +5390,6 @@ struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry)
return inode;
}
- index = srcu_read_lock(&fs_info->subvol_srcu);
ret = fixup_tree_root_location(fs_info, dir, dentry,
&location, &sub_root);
if (ret < 0) {
@@ -5345,7 +5400,8 @@ struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry)
} else {
inode = btrfs_iget(dir->i_sb, &location, sub_root);
}
- srcu_read_unlock(&fs_info->subvol_srcu, index);
+ if (root != sub_root)
+ btrfs_put_root(sub_root);
if (!IS_ERR(inode) && root != sub_root) {
down_read(&fs_info->cleanup_work_sem);
@@ -5826,7 +5882,7 @@ static struct inode *btrfs_new_inode(struct btrfs_trans_handle *trans,
*/
BTRFS_I(inode)->index_cnt = 2;
BTRFS_I(inode)->dir_index = *index;
- BTRFS_I(inode)->root = root;
+ BTRFS_I(inode)->root = btrfs_grab_root(root);
BTRFS_I(inode)->generation = trans->transid;
inode->i_generation = BTRFS_I(inode)->generation;
@@ -6463,6 +6519,7 @@ struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
extent_type = btrfs_file_extent_type(leaf, item);
extent_start = found_key.offset;
+ extent_end = btrfs_file_extent_end(path);
if (extent_type == BTRFS_FILE_EXTENT_REG ||
extent_type == BTRFS_FILE_EXTENT_PREALLOC) {
/* Only regular file could have regular/prealloc extent */
@@ -6473,18 +6530,9 @@ struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
btrfs_ino(inode));
goto out;
}
- extent_end = extent_start +
- btrfs_file_extent_num_bytes(leaf, item);
-
trace_btrfs_get_extent_show_fi_regular(inode, leaf, item,
extent_start);
} else if (extent_type == BTRFS_FILE_EXTENT_INLINE) {
- size_t size;
-
- size = btrfs_file_extent_ram_bytes(leaf, item);
- extent_end = ALIGN(extent_start + size,
- fs_info->sectorsize);
-
trace_btrfs_get_extent_show_fi_inline(inode, leaf, item,
path->slots[0],
extent_start);
@@ -8211,9 +8259,7 @@ static int btrfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
int btrfs_readpage(struct file *file, struct page *page)
{
- struct extent_io_tree *tree;
- tree = &BTRFS_I(page->mapping->host)->io_tree;
- return extent_read_full_page(tree, page, btrfs_get_extent, 0);
+ return extent_read_full_page(page, btrfs_get_extent, 0);
}
static int btrfs_writepage(struct page *page, struct writeback_control *wbc)
@@ -8272,6 +8318,39 @@ static int btrfs_releasepage(struct page *page, gfp_t gfp_flags)
return __btrfs_releasepage(page, gfp_flags);
}
+#ifdef CONFIG_MIGRATION
+static int btrfs_migratepage(struct address_space *mapping,
+ struct page *newpage, struct page *page,
+ enum migrate_mode mode)
+{
+ int ret;
+
+ ret = migrate_page_move_mapping(mapping, newpage, page, 0);
+ if (ret != MIGRATEPAGE_SUCCESS)
+ return ret;
+
+ if (page_has_private(page)) {
+ ClearPagePrivate(page);
+ get_page(newpage);
+ set_page_private(newpage, page_private(page));
+ set_page_private(page, 0);
+ put_page(page);
+ SetPagePrivate(newpage);
+ }
+
+ if (PagePrivate2(page)) {
+ ClearPagePrivate2(page);
+ SetPagePrivate2(newpage);
+ }
+
+ if (mode != MIGRATE_SYNC_NO_COPY)
+ migrate_page_copy(newpage, page);
+ else
+ migrate_page_states(newpage, page);
+ return MIGRATEPAGE_SUCCESS;
+}
+#endif
+
static void btrfs_invalidatepage(struct page *page, unsigned int offset,
unsigned int length)
{
@@ -8647,7 +8726,7 @@ static int btrfs_truncate(struct inode *inode, bool skip_writeback)
break;
}
- btrfs_block_rsv_release(fs_info, rsv, -1);
+ btrfs_block_rsv_release(fs_info, rsv, -1, NULL);
ret = btrfs_block_rsv_migrate(&fs_info->trans_block_rsv,
rsv, min_size, false);
BUG_ON(ret); /* shouldn't happen */
@@ -8672,7 +8751,7 @@ static int btrfs_truncate(struct inode *inode, bool skip_writeback)
ret = PTR_ERR(trans);
goto out;
}
- btrfs_ordered_update_i_size(inode, inode->i_size, NULL);
+ btrfs_inode_safe_disk_i_size_write(inode, 0);
}
if (trans) {
@@ -8776,6 +8855,8 @@ struct inode *btrfs_alloc_inode(struct super_block *sb)
extent_io_tree_init(fs_info, &ei->io_tree, IO_TREE_INODE_IO, inode);
extent_io_tree_init(fs_info, &ei->io_failure_tree,
IO_TREE_INODE_IO_FAILURE, inode);
+ extent_io_tree_init(fs_info, &ei->file_extent_tree,
+ IO_TREE_INODE_FILE_EXTENT, inode);
ei->io_tree.track_uptodate = true;
ei->io_failure_tree.track_uptodate = true;
atomic_set(&ei->sync_writers, 0);
@@ -8842,6 +8923,8 @@ void btrfs_destroy_inode(struct inode *inode)
btrfs_qgroup_check_reserved_leak(inode);
inode_tree_del(inode);
btrfs_drop_extent_cache(BTRFS_I(inode), 0, (u64)-1, 0);
+ btrfs_inode_clear_file_extent_range(BTRFS_I(inode), 0, (u64)-1);
+ btrfs_put_root(BTRFS_I(inode)->root);
}
int btrfs_drop_inode(struct inode *inode)
@@ -9669,14 +9752,14 @@ int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int nr)
while (!list_empty(&splice) && nr) {
root = list_first_entry(&splice, struct btrfs_root,
delalloc_root);
- root = btrfs_grab_fs_root(root);
+ root = btrfs_grab_root(root);
BUG_ON(!root);
list_move_tail(&root->delalloc_root,
&fs_info->delalloc_roots);
spin_unlock(&fs_info->delalloc_root_lock);
ret = start_delalloc_inodes(root, nr, false);
- btrfs_put_fs_root(root);
+ btrfs_put_root(root);
if (ret < 0)
goto out;
@@ -9938,7 +10021,7 @@ next:
else
i_size = cur_offset;
i_size_write(inode, i_size);
- btrfs_ordered_update_i_size(inode, i_size, NULL);
+ btrfs_inode_safe_disk_i_size_write(inode, 0);
}
ret = btrfs_update_inode(trans, root, inode);
@@ -10474,6 +10557,9 @@ static const struct address_space_operations btrfs_aops = {
.direct_IO = btrfs_direct_IO,
.invalidatepage = btrfs_invalidatepage,
.releasepage = btrfs_releasepage,
+#ifdef CONFIG_MIGRATION
+ .migratepage = btrfs_migratepage,
+#endif
.set_page_dirty = btrfs_set_page_dirty,
.error_remove_page = generic_error_remove_page,
.swap_activate = btrfs_swap_activate,
generated by cgit (git 2.34.1) at 2024-05-09 21:51:18 +0000