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Diffstat (limited to 'fs/btrfs/inode.c')
-rw-r--r--fs/btrfs/inode.c65
1 files changed, 36 insertions, 29 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 6bfc4343c98d..95c499b8424e 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -481,17 +481,6 @@ static noinline int add_async_extent(struct async_chunk *cow,
}
/*
- * Check if the inode has flags compatible with compression
- */
-static inline bool inode_can_compress(struct btrfs_inode *inode)
-{
- if (inode->flags & BTRFS_INODE_NODATACOW ||
- inode->flags & BTRFS_INODE_NODATASUM)
- return false;
- return true;
-}
-
-/*
* Check if the inode needs to be submitted to compression, based on mount
* options, defragmentation, properties or heuristics.
*/
@@ -500,7 +489,7 @@ static inline int inode_need_compress(struct btrfs_inode *inode, u64 start,
{
struct btrfs_fs_info *fs_info = inode->root->fs_info;
- if (!inode_can_compress(inode)) {
+ if (!btrfs_inode_can_compress(inode)) {
WARN(IS_ENABLED(CONFIG_BTRFS_DEBUG),
KERN_ERR "BTRFS: unexpected compression for ino %llu\n",
btrfs_ino(inode));
@@ -1128,7 +1117,6 @@ static noinline int cow_file_range(struct btrfs_inode *inode,
int ret = 0;
if (btrfs_is_free_space_inode(inode)) {
- WARN_ON_ONCE(1);
ret = -EINVAL;
goto out_unlock;
}
@@ -2017,11 +2005,10 @@ int btrfs_run_delalloc_range(struct btrfs_inode *inode, struct page *locked_page
* to use run_delalloc_nocow() here, like for regular
* preallocated inodes.
*/
- ASSERT(!zoned ||
- (zoned && btrfs_is_data_reloc_root(inode->root)));
+ ASSERT(!zoned || btrfs_is_data_reloc_root(inode->root));
ret = run_delalloc_nocow(inode, locked_page, start, end,
page_started, nr_written);
- } else if (!inode_can_compress(inode) ||
+ } else if (!btrfs_inode_can_compress(inode) ||
!inode_need_compress(inode, start, end)) {
if (zoned)
ret = run_delalloc_zoned(inode, locked_page, start, end,
@@ -4488,6 +4475,13 @@ int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry)
dest->root_key.objectid);
return -EPERM;
}
+ if (atomic_read(&dest->nr_swapfiles)) {
+ spin_unlock(&dest->root_item_lock);
+ btrfs_warn(fs_info,
+ "attempt to delete subvolume %llu with active swapfile",
+ root->root_key.objectid);
+ return -EPERM;
+ }
root_flags = btrfs_root_flags(&dest->root_item);
btrfs_set_root_flags(&dest->root_item,
root_flags | BTRFS_ROOT_SUBVOL_DEAD);
@@ -7438,6 +7432,7 @@ static int btrfs_get_blocks_direct_write(struct extent_map **map,
u64 block_start, orig_start, orig_block_len, ram_bytes;
bool can_nocow = false;
bool space_reserved = false;
+ u64 prev_len;
int ret = 0;
/*
@@ -7465,6 +7460,7 @@ static int btrfs_get_blocks_direct_write(struct extent_map **map,
can_nocow = true;
}
+ prev_len = len;
if (can_nocow) {
struct extent_map *em2;
@@ -7494,8 +7490,6 @@ static int btrfs_get_blocks_direct_write(struct extent_map **map,
goto out;
}
} else {
- const u64 prev_len = len;
-
/* Our caller expects us to free the input extent map. */
free_extent_map(em);
*map = NULL;
@@ -7526,7 +7520,7 @@ static int btrfs_get_blocks_direct_write(struct extent_map **map,
* We have created our ordered extent, so we can now release our reservation
* for an outstanding extent.
*/
- btrfs_delalloc_release_extents(BTRFS_I(inode), len);
+ btrfs_delalloc_release_extents(BTRFS_I(inode), prev_len);
/*
* Need to update the i_size under the extent lock so buffered
@@ -7805,8 +7799,6 @@ static blk_status_t btrfs_check_read_dio_bio(struct btrfs_dio_private *dip,
const bool csum = !(BTRFS_I(inode)->flags & BTRFS_INODE_NODATASUM);
struct bio_vec bvec;
struct bvec_iter iter;
- const u64 orig_file_offset = dip->file_offset;
- u64 start = orig_file_offset;
u32 bio_offset = 0;
blk_status_t err = BLK_STS_OK;
@@ -7816,6 +7808,8 @@ static blk_status_t btrfs_check_read_dio_bio(struct btrfs_dio_private *dip,
nr_sectors = BTRFS_BYTES_TO_BLKS(fs_info, bvec.bv_len);
pgoff = bvec.bv_offset;
for (i = 0; i < nr_sectors; i++) {
+ u64 start = bbio->file_offset + bio_offset;
+
ASSERT(pgoff < PAGE_SIZE);
if (uptodate &&
(!csum || !check_data_csum(inode, bbio,
@@ -7828,17 +7822,13 @@ static blk_status_t btrfs_check_read_dio_bio(struct btrfs_dio_private *dip,
} else {
int ret;
- ASSERT((start - orig_file_offset) < UINT_MAX);
- ret = btrfs_repair_one_sector(inode,
- &bbio->bio,
- start - orig_file_offset,
- bvec.bv_page, pgoff,
+ ret = btrfs_repair_one_sector(inode, &bbio->bio,
+ bio_offset, bvec.bv_page, pgoff,
start, bbio->mirror_num,
submit_dio_repair_bio);
if (ret)
err = errno_to_blk_status(ret);
}
- start += sectorsize;
ASSERT(bio_offset + sectorsize > bio_offset);
bio_offset += sectorsize;
pgoff += sectorsize;
@@ -7865,6 +7855,7 @@ static blk_status_t btrfs_submit_bio_start_direct_io(struct inode *inode,
static void btrfs_end_dio_bio(struct bio *bio)
{
struct btrfs_dio_private *dip = bio->bi_private;
+ struct btrfs_bio *bbio = btrfs_bio(bio);
blk_status_t err = bio->bi_status;
if (err)
@@ -7875,12 +7866,12 @@ static void btrfs_end_dio_bio(struct bio *bio)
bio->bi_iter.bi_size, err);
if (bio_op(bio) == REQ_OP_READ)
- err = btrfs_check_read_dio_bio(dip, btrfs_bio(bio), !err);
+ err = btrfs_check_read_dio_bio(dip, bbio, !err);
if (err)
dip->dio_bio->bi_status = err;
- btrfs_record_physical_zoned(dip->inode, dip->file_offset, bio);
+ btrfs_record_physical_zoned(dip->inode, bbio->file_offset, bio);
bio_put(bio);
btrfs_dio_private_put(dip);
@@ -8041,6 +8032,7 @@ static void btrfs_submit_direct(const struct iomap_iter *iter,
bio = btrfs_bio_clone_partial(dio_bio, clone_offset, clone_len);
bio->bi_private = dip;
bio->bi_end_io = btrfs_end_dio_bio;
+ btrfs_bio(bio)->file_offset = file_offset;
if (bio_op(bio) == REQ_OP_ZONE_APPEND) {
status = extract_ordered_extent(BTRFS_I(inode), bio,
@@ -11107,8 +11099,23 @@ static int btrfs_swap_activate(struct swap_info_struct *sis, struct file *file,
* set. We use this counter to prevent snapshots. We must increment it
* before walking the extents because we don't want a concurrent
* snapshot to run after we've already checked the extents.
+ *
+ * It is possible that subvolume is marked for deletion but still not
+ * removed yet. To prevent this race, we check the root status before
+ * activating the swapfile.
*/
+ spin_lock(&root->root_item_lock);
+ if (btrfs_root_dead(root)) {
+ spin_unlock(&root->root_item_lock);
+
+ btrfs_exclop_finish(fs_info);
+ btrfs_warn(fs_info,
+ "cannot activate swapfile because subvolume %llu is being deleted",
+ root->root_key.objectid);
+ return -EPERM;
+ }
atomic_inc(&root->nr_swapfiles);
+ spin_unlock(&root->root_item_lock);
isize = ALIGN_DOWN(inode->i_size, fs_info->sectorsize);
generated by cgit (git 2.34.1) at 2024-05-18 19:31:31 +0000