Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4

Pull ext4 updates from Ted Ts'o:
 "A large number of cleanups and bug fixes, with many of the bug fixes
  found by Syzbot and fuzzing. (Many of the bug fixes involve less-used
  ext4 features such as fast_commit, inline_data and bigalloc)

  In addition, remove the writepage function for ext4, since the
  medium-term plan is to remove ->writepage() entirely. (The VM doesn't
  need or want writepage() for writeback, since it is fine with
  ->writepages() so long as ->migrate_folio() is implemented)"

* tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (58 commits)
  ext4: fix reserved cluster accounting in __es_remove_extent()
  ext4: fix inode leak in ext4_xattr_inode_create() on an error path
  ext4: allocate extended attribute value in vmalloc area
  ext4: avoid unaccounted block allocation when expanding inode
  ext4: initialize quota before expanding inode in setproject ioctl
  ext4: stop providing .writepage hook
  mm: export buffer_migrate_folio_norefs()
  ext4: switch to using write_cache_pages() for data=journal writeout
  jbd2: switch jbd2_submit_inode_data() to use fs-provided hook for data writeout
  ext4: switch to using ext4_do_writepages() for ordered data writeout
  ext4: move percpu_rwsem protection into ext4_writepages()
  ext4: provide ext4_do_writepages()
  ext4: add support for writepages calls that cannot map blocks
  ext4: drop pointless IO submission from ext4_bio_write_page()
  ext4: remove nr_submitted from ext4_bio_write_page()
  ext4: move keep_towrite handling to ext4_bio_write_page()
  ext4: handle redirtying in ext4_bio_write_page()
  ext4: fix kernel BUG in 'ext4_write_inline_data_end()'
  ext4: make ext4_mb_initialize_context return void
  ext4: fix deadlock due to mbcache entry corruption
  ...

1 files changed, 11 insertions, 5 deletions

diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 6c399a8b22b3..9de1c9d1a13d 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -2635,9 +2635,8 @@ ext4_ext_rm_leaf(handle_t *handle, struct inode *inode,
 			  unwritten, ex_ee_len);
 		path[depth].p_ext = ex;
 
-		a = ex_ee_block > start ? ex_ee_block : start;
-		b = ex_ee_block+ex_ee_len - 1 < end ?
-			ex_ee_block+ex_ee_len - 1 : end;
+		a = max(ex_ee_block, start);
+		b = min(ex_ee_block + ex_ee_len - 1, end);
 
 		ext_debug(inode, "  border %u:%u\n", a, b);
 
@@ -5567,8 +5566,7 @@ static int ext4_insert_range(struct file *file, loff_t offset, loff_t len)
 	 * ee_start_lblk to shift extents
 	 */
 	ret = ext4_ext_shift_extents(inode, handle,
-		ee_start_lblk > offset_lblk ? ee_start_lblk : offset_lblk,
-		len_lblk, SHIFT_RIGHT);
+		max(ee_start_lblk, offset_lblk), len_lblk, SHIFT_RIGHT);
 
 	up_write(&EXT4_I(inode)->i_data_sem);
 	if (IS_SYNC(inode))
@@ -5799,6 +5797,14 @@ int ext4_clu_mapped(struct inode *inode, ext4_lblk_t lclu)
 	struct ext4_extent *extent;
 	ext4_lblk_t first_lblk, first_lclu, last_lclu;
 
+	/*
+	 * if data can be stored inline, the logical cluster isn't
+	 * mapped - no physical clusters have been allocated, and the
+	 * file has no extents
+	 */
+	if (ext4_test_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA))
+		return 0;
+
 	/* search for the extent closest to the first block in the cluster */
 	path = ext4_find_extent(inode, EXT4_C2B(sbi, lclu), NULL, 0);
 	if (IS_ERR(path)) {