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Date: Tue, 24 May 2016 12:29:24 -0400
From: Theodore Ts'o <tytso@....edu>
To: torvalds@...ux-foundation.org
Cc: linux-kernel@...r.kernel.org, linux-ext4@...r.kernel.org
Subject: [GIT PULL] ext4 updates for 4.7
Note: there are some merge conflicts in the Direct I/O handling code.
The resolution of them is in linux-next, as well as here:
http://git.kernel.org/cgit/linux/kernel/git/tytso/ext4.git/commit/?h=trial-merge
Also see below for the output of "git show trial-merge". (I couldn't
figure out a way to generate this from the git web interface --- is
there a way?)
- Ted
The following changes since commit c3b46c73264b03000d1e18b22f5caf63332547c9:
Linux 4.6-rc4 (2016-04-17 19:13:32 -0700)
are available in the git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git tags/ext4_for_linus
for you to fetch changes up to 12735f881952c32b31bc4e433768f18489f79ec9:
ext4: pre-zero allocated blocks for DAX IO (2016-05-13 00:51:15 -0400)
----------------------------------------------------------------
Fix a number of bugs, most notably a potential stale data exposure
after a crash and a potential BUG_ON crash if a file has the data
journalling flag enabled while it has dirty delayed allocation blocks
that haven't been written yet. Also fix a potential crash in the new
project quota code and a maliciously corrupted file system.
In addition, fix some DAX-specific bugs, including when there is a
transient ENOSPC situation and races between writes via direct I/O and
an mmap'ed segment that could lead to lost I/O.
Finally the usual set of miscellaneous cleanups.
----------------------------------------------------------------
Daeho Jeong (2):
ext4: handle unwritten or delalloc buffers before enabling data journaling
ext4: fix races between changing inode journal mode and ext4_writepages
Jakub Wilk (1):
ext4: remove trailing \n from ext4_warning/ext4_error calls
Jan Kara (10):
ext4: fix data exposure after a crash
ext4: remove EXT4_STATE_ORDERED_MODE
jbd2: add support for avoiding data writes during transaction commits
ext4: do not ask jbd2 to write data for delalloc buffers
ext4: fix oops on corrupted filesystem
dax: call get_blocks() with create == 1 for write faults to unwritten extents
ext4: handle transient ENOSPC properly for DAX
ext4: fix race in transient ENOSPC detection
ext4: refactor direct IO code
ext4: pre-zero allocated blocks for DAX IO
Jens Axboe (1):
ext4: remove unnecessary bio get/put
Luis de Bethencourt (1):
jbd2: remove excess descriptions for handle_s
Nicolai Stange (3):
ext4: address UBSAN warning in mb_find_order_for_block()
ext4: silence UBSAN in ext4_mb_init()
ext4: remove unmeetable inconsisteny check from ext4_find_extent()
Seth Forshee (1):
ext4: fix check of dqget() return value in ext4_ioctl_setproject()
Theodore Ts'o (4):
ext4: allow readdir()'s of large empty directories to be interrupted
ext4: fix jbd2 handle extension in ext4_ext_truncate_extend_restart()
ext4: fix hang when processing corrupted orphaned inode list
ext4: clean up error handling when orphan list is corrupted
fs/compat.c | 4 ++
fs/dax.c | 2 +-
fs/ext4/balloc.c | 3 +-
fs/ext4/dir.c | 5 ++
fs/ext4/ext4.h | 21 ++++--
fs/ext4/ext4_jbd2.h | 15 +++-
fs/ext4/extents.c | 20 +++---
fs/ext4/extents_status.c | 2 +-
fs/ext4/file.c | 6 +-
fs/ext4/ialloc.c | 59 ++++++++--------
fs/ext4/indirect.c | 127 ----------------------------------
fs/ext4/inline.c | 2 +-
fs/ext4/inode.c | 326 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-----------------------------
fs/ext4/ioctl.c | 2 +-
fs/ext4/mballoc.c | 12 ++--
fs/ext4/mmp.c | 4 +-
fs/ext4/move_extent.c | 2 +-
fs/ext4/namei.c | 9 ++-
fs/ext4/page-io.c | 2 -
fs/ext4/resize.c | 2 +-
fs/ext4/super.c | 4 ++
fs/jbd2/commit.c | 4 ++
fs/jbd2/journal.c | 3 +-
fs/jbd2/transaction.c | 22 ++++--
fs/ocfs2/journal.h | 2 +-
fs/readdir.c | 4 ++
include/linux/jbd2.h | 16 +++--
kernel/locking/percpu-rwsem.c | 1 +
28 files changed, 366 insertions(+), 315 deletions(-)
--------------
commit 49cb72c1e6373ef999ea92aecb5479c3bb1ab654
Merge: f6c658d 12735f8
Author: Theodore Ts'o <tytso@....edu>
Date: Sun May 22 22:19:57 2016 -0400
Merge branch 'dev' into test
diff --cc fs/ext4/inode.c
index 79b298d,f9ab1e8..f7140ca
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@@ -3334,12 -3327,13 +3327,13 @@@ static int ext4_end_io_dio(struct kioc
* if the machine crashes during the write.
*
*/
- static ssize_t ext4_ext_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
-static ssize_t ext4_direct_IO_write(struct kiocb *iocb, struct iov_iter *iter,
- loff_t offset)
++static ssize_t ext4_direct_IO_write(struct kiocb *iocb, struct iov_iter *iter)
{
struct file *file = iocb->ki_filp;
struct inode *inode = file->f_mapping->host;
+ struct ext4_inode_info *ei = EXT4_I(inode);
ssize_t ret;
+ loff_t offset = iocb->ki_pos;
size_t count = iov_iter_count(iter);
int overwrite = 0;
get_block_t *get_block_func = NULL;
@@@ -3399,12 -3423,12 +3423,12 @@@
#ifdef CONFIG_EXT4_FS_ENCRYPTION
BUG_ON(ext4_encrypted_inode(inode) && S_ISREG(inode->i_mode));
#endif
- if (IS_DAX(inode))
+ if (IS_DAX(inode)) {
- ret = dax_do_io(iocb, inode, iter, offset, get_block_func,
+ ret = dax_do_io(iocb, inode, iter, get_block_func,
ext4_end_io_dio, dio_flags);
- else
+ } else
ret = __blockdev_direct_IO(iocb, inode,
- inode->i_sb->s_bdev, iter, offset,
+ inode->i_sb->s_bdev, iter,
get_block_func,
ext4_end_io_dio, NULL, dio_flags);
@@@ -3428,6 -3451,82 +3451,81 @@@
if (overwrite)
inode_lock(inode);
+ if (ret < 0 && final_size > inode->i_size)
+ ext4_truncate_failed_write(inode);
+
+ /* Handle extending of i_size after direct IO write */
+ if (orphan) {
+ int err;
+
+ /* Credits for sb + inode write */
+ handle = ext4_journal_start(inode, EXT4_HT_INODE, 2);
+ if (IS_ERR(handle)) {
+ /* This is really bad luck. We've written the data
+ * but cannot extend i_size. Bail out and pretend
+ * the write failed... */
+ ret = PTR_ERR(handle);
+ if (inode->i_nlink)
+ ext4_orphan_del(NULL, inode);
+
+ goto out;
+ }
+ if (inode->i_nlink)
+ ext4_orphan_del(handle, inode);
+ if (ret > 0) {
+ loff_t end = offset + ret;
+ if (end > inode->i_size) {
+ ei->i_disksize = end;
+ i_size_write(inode, end);
+ /*
+ * We're going to return a positive `ret'
+ * here due to non-zero-length I/O, so there's
+ * no way of reporting error returns from
+ * ext4_mark_inode_dirty() to userspace. So
+ * ignore it.
+ */
+ ext4_mark_inode_dirty(handle, inode);
+ }
+ }
+ err = ext4_journal_stop(handle);
+ if (ret == 0)
+ ret = err;
+ }
+ out:
+ return ret;
+ }
+
-static ssize_t ext4_direct_IO_read(struct kiocb *iocb, struct iov_iter *iter,
- loff_t offset)
++static ssize_t ext4_direct_IO_read(struct kiocb *iocb, struct iov_iter *iter)
+ {
+ int unlocked = 0;
+ struct inode *inode = iocb->ki_filp->f_mapping->host;
+ ssize_t ret;
+
+ if (ext4_should_dioread_nolock(inode)) {
+ /*
+ * Nolock dioread optimization may be dynamically disabled
+ * via ext4_inode_block_unlocked_dio(). Check inode's state
+ * while holding extra i_dio_count ref.
+ */
+ inode_dio_begin(inode);
+ smp_mb();
+ if (unlikely(ext4_test_inode_state(inode,
+ EXT4_STATE_DIOREAD_LOCK)))
+ inode_dio_end(inode);
+ else
+ unlocked = 1;
+ }
+ if (IS_DAX(inode)) {
- ret = dax_do_io(iocb, inode, iter, offset, ext4_dio_get_block,
++ ret = dax_do_io(iocb, inode, iter, ext4_dio_get_block,
+ NULL, unlocked ? 0 : DIO_LOCKING);
+ } else {
+ ret = __blockdev_direct_IO(iocb, inode, inode->i_sb->s_bdev,
- iter, offset, ext4_dio_get_block,
++ iter, ext4_dio_get_block,
+ NULL, NULL,
+ unlocked ? 0 : DIO_LOCKING);
+ }
+ if (unlocked)
+ inode_dio_end(inode);
return ret;
}
@@@ -3455,10 -3554,10 +3553,10 @@@ static ssize_t ext4_direct_IO(struct ki
return 0;
trace_ext4_direct_IO_enter(inode, offset, count, iov_iter_rw(iter));
- if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))
- ret = ext4_ext_direct_IO(iocb, iter);
+ if (iov_iter_rw(iter) == READ)
- ret = ext4_direct_IO_read(iocb, iter, offset);
++ ret = ext4_direct_IO_read(iocb, iter);
else
- ret = ext4_ind_direct_IO(iocb, iter);
- ret = ext4_direct_IO_write(iocb, iter, offset);
++ ret = ext4_direct_IO_write(iocb, iter);
trace_ext4_direct_IO_exit(inode, offset, count, iov_iter_rw(iter), ret);
return ret;
}
--
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