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authorLinus Torvalds <torvalds@linux-foundation.org>2020-08-21 21:03:38 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2020-08-21 21:03:38 +0300
commitd723b99ec9e502a414a96a51ec229333f807b47e (patch)
tree2602310329eb4ecc3438a450c38781e1d44bf81d /fs/buffer.c
parent5e0b17b026eb7c6de9baa9b0d45a51b05f05abe1 (diff)
parent27bc446e2def38db3244a6eb4bb1d6312936610a (diff)
downloadlinux-d723b99ec9e502a414a96a51ec229333f807b47e.tar.xz
Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
Pull ext4 updates from Ted Ts'o: "Improvements to ext4's block allocator performance for very large file systems, especially when the file system or files which are highly fragmented. There is a new mount option, prefetch_block_bitmaps which will pull in the block bitmaps and set up the in-memory buddy bitmaps when the file system is initially mounted. Beyond that, a lot of bug fixes and cleanups. In particular, a number of changes to make ext4 more robust in the face of write errors or file system corruptions" * tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (46 commits) ext4: limit the length of per-inode prealloc list ext4: reorganize if statement of ext4_mb_release_context() ext4: add mb_debug logging when there are lost chunks ext4: Fix comment typo "the the". jbd2: clean up checksum verification in do_one_pass() ext4: change to use fallthrough macro ext4: remove unused parameter of ext4_generic_delete_entry function mballoc: replace seq_printf with seq_puts ext4: optimize the implementation of ext4_mb_good_group() ext4: delete invalid comments near ext4_mb_check_limits() ext4: fix typos in ext4_mb_regular_allocator() comment ext4: fix checking of directory entry validity for inline directories fs: prevent BUG_ON in submit_bh_wbc() ext4: correctly restore system zone info when remount fails ext4: handle add_system_zone() failure in ext4_setup_system_zone() ext4: fold ext4_data_block_valid_rcu() into the caller ext4: check journal inode extents more carefully ext4: don't allow overlapping system zones ext4: handle error of ext4_setup_system_zone() on remount ext4: delete the invalid BUGON in ext4_mb_load_buddy_gfp() ...
Diffstat (limited to 'fs/buffer.c')
-rw-r--r--fs/buffer.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/fs/buffer.c b/fs/buffer.c
index 061dd202979d..d468ed9981e0 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -3157,6 +3157,15 @@ int __sync_dirty_buffer(struct buffer_head *bh, int op_flags)
WARN_ON(atomic_read(&bh->b_count) < 1);
lock_buffer(bh);
if (test_clear_buffer_dirty(bh)) {
+ /*
+ * The bh should be mapped, but it might not be if the
+ * device was hot-removed. Not much we can do but fail the I/O.
+ */
+ if (!buffer_mapped(bh)) {
+ unlock_buffer(bh);
+ return -EIO;
+ }
+
get_bh(bh);
bh->b_end_io = end_buffer_write_sync;
ret = submit_bh(REQ_OP_WRITE, op_flags, bh);