From 812c0cab2c0dfad977605dbadf9148490ca5d93f Mon Sep 17 00:00:00 2001
From: Theodore Ts'o <tytso@mit.edu>
Date: Mon, 24 Dec 2018 20:27:08 -0500
Subject: ext4: make sure enough credits are reserved for dioread_nolock writes
There are enough credits reserved for most dioread_nolock writes;
however, if the extent tree is sufficiently deep, and/or quota is
enabled, the code was not allowing for all eventualities when
reserving journal credits for the unwritten extent conversion.
This problem can be seen using xfstests ext4/034:
WARNING: CPU: 1 PID: 257 at fs/ext4/ext4_jbd2.c:271 __ext4_handle_dirty_metadata+0x10c/0x180
Workqueue: ext4-rsv-conversion ext4_end_io_rsv_work
RIP: 0010:__ext4_handle_dirty_metadata+0x10c/0x180
...
EXT4-fs: ext4_free_blocks:4938: aborting transaction: error 28 in __ext4_handle_dirty_metadata
EXT4: jbd2_journal_dirty_metadata failed: handle type 11 started at line 4921, credits 4/0, errcode -28
EXT4-fs error (device dm-1) in ext4_free_blocks:4950: error 28
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org
---
fs/ext4/inode.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 9affabd07682..165ff331d998 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -2778,7 +2778,8 @@ static int ext4_writepages(struct address_space *mapping,
* We may need to convert up to one extent per block in
* the page and we may dirty the inode.
*/
- rsv_blocks = 1 + (PAGE_SIZE >> inode->i_blkbits);
+ rsv_blocks = 1 + ext4_chunk_trans_blocks(inode,
+ PAGE_SIZE >> inode->i_blkbits);
}
/*
--
cgit v1.2.3-70-g09d2
From 2b08b1f12cd664dc7d5c84ead9ff25ae97ad5491 Mon Sep 17 00:00:00 2001
From: Theodore Ts'o <tytso@mit.edu>
Date: Tue, 25 Dec 2018 00:56:33 -0500
Subject: ext4: fix a potential fiemap/page fault deadlock w/ inline_data
The ext4_inline_data_fiemap() function calls fiemap_fill_next_extent()
while still holding the xattr semaphore. This is not necessary and it
triggers a circular lockdep warning. This is because
fiemap_fill_next_extent() could trigger a page fault when it writes
into page which triggers a page fault. If that page is mmaped from
the inline file in question, this could very well result in a
deadlock.
This problem can be reproduced using generic/519 with a file system
configuration which has the inline_data feature enabled.
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org
---
fs/ext4/inline.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c
index 27373d88b5f0..56f6e1782d5f 100644
--- a/fs/ext4/inline.c
+++ b/fs/ext4/inline.c
@@ -1890,12 +1890,12 @@ int ext4_inline_data_fiemap(struct inode *inode,
physical += (char *)ext4_raw_inode(&iloc) - iloc.bh->b_data;
physical += offsetof(struct ext4_inode, i_block);
- if (physical)
- error = fiemap_fill_next_extent(fieinfo, start, physical,
- inline_len, flags);
brelse(iloc.bh);
out:
up_read(&EXT4_I(inode)->xattr_sem);
+ if (physical)
+ error = fiemap_fill_next_extent(fieinfo, start, physical,
+ inline_len, flags);
return (error < 0 ? error : 0);
}
--
cgit v1.2.3-70-g09d2
From e86807862e6880809f191c4cea7f88a489f0ed34 Mon Sep 17 00:00:00 2001
From: Theodore Ts'o <tytso@mit.edu>
Date: Sun, 30 Dec 2018 23:20:39 -0500
Subject: ext4: avoid kernel warning when writing the superblock to a dead
device
The xfstests generic/475 test switches the underlying device with
dm-error while running a stress test. This results in a large number
of file system errors, and since we can't lock the buffer head when
marking the superblock dirty in the ext4_grp_locked_error() case, it's
possible the superblock to be !buffer_uptodate() without
buffer_write_io_error() being true.
We need to set buffer_uptodate() before we call mark_buffer_dirty() or
this will trigger a WARN_ON. It's safe to do this since the
superblock must have been properly read into memory or the mount would
have been successful. So if buffer_uptodate() is not set, we can
safely assume that this happened due to a failed attempt to write the
superblock.
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@vger.kernel.org
---
fs/ext4/super.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index d6c142d73d99..fb12d3c17c1b 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -4902,7 +4902,7 @@ static int ext4_commit_super(struct super_block *sb, int sync)
ext4_superblock_csum_set(sb);
if (sync)
lock_buffer(sbh);
- if (buffer_write_io_error(sbh)) {
+ if (buffer_write_io_error(sbh) || !buffer_uptodate(sbh)) {
/*
* Oh, dear. A previous attempt to write the
* superblock failed. This could happen because the
--
cgit v1.2.3-70-g09d2
From ad211f3e94b314a910d4af03178a0b52a7d1ee0a Mon Sep 17 00:00:00 2001
From: Theodore Ts'o <tytso@mit.edu>
Date: Mon, 31 Dec 2018 00:10:48 -0500
Subject: ext4: use ext4_write_inode() when fsyncing w/o a journal
In no-journal mode, we previously used __generic_file_fsync() in
no-journal mode. This triggers a lockdep warning, and in addition,
it's not safe to depend on the inode writeback mechanism in the case
ext4. We can solve both problems by calling ext4_write_inode()
directly.
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org
---
fs/ext4/fsync.c | 13 +++++++++----
1 file changed, 9 insertions(+), 4 deletions(-)
diff --git a/fs/ext4/fsync.c b/fs/ext4/fsync.c
index 26a7fe5c4fd3..87a7ff00ef62 100644
--- a/fs/ext4/fsync.c
+++ b/fs/ext4/fsync.c
@@ -116,8 +116,16 @@ int ext4_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
goto out;
}
+ ret = file_write_and_wait_range(file, start, end);
+ if (ret)
+ return ret;
+
if (!journal) {
- ret = __generic_file_fsync(file, start, end, datasync);
+ struct writeback_control wbc = {
+ .sync_mode = WB_SYNC_ALL
+ };
+
+ ret = ext4_write_inode(inode, &wbc);
if (!ret)
ret = ext4_sync_parent(inode);
if (test_opt(inode->i_sb, BARRIER))
@@ -125,9 +133,6 @@ int ext4_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
goto out;
}
- ret = file_write_and_wait_range(file, start, end);
- if (ret)
- return ret;
/*
* data=writeback,ordered:
* The caller's filemap_fdatawrite()/wait will sync the data.
--
cgit v1.2.3-70-g09d2
From 95cb67138746451cc84cf8e516e14989746e93b0 Mon Sep 17 00:00:00 2001
From: Theodore Ts'o <tytso@mit.edu>
Date: Mon, 31 Dec 2018 00:11:07 -0500
Subject: ext4: track writeback errors using the generic tracking
infrastructure
We already using mapping_set_error() in fs/ext4/page_io.c, so all we
need to do is to use file_check_and_advance_wb_err() when handling
fsync() requests in ext4_sync_file().
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org
---
fs/ext4/fsync.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/fs/ext4/fsync.c b/fs/ext4/fsync.c
index 87a7ff00ef62..712f00995390 100644
--- a/fs/ext4/fsync.c
+++ b/fs/ext4/fsync.c
@@ -164,6 +164,9 @@ int ext4_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
ret = err;
}
out:
+ err = file_check_and_advance_wb_err(file);
+ if (ret == 0)
+ ret = err;
trace_ext4_sync_file_exit(inode, ret);
return ret;
}
--
cgit v1.2.3-70-g09d2
From 191ce17876c9367819c4b0a25b503c0f6d9054d8 Mon Sep 17 00:00:00 2001
From: Theodore Ts'o <tytso@mit.edu>
Date: Mon, 31 Dec 2018 22:34:31 -0500
Subject: ext4: fix special inode number checks in __ext4_iget()
The check for special (reserved) inode number checks in __ext4_iget()
was broken by commit 8a363970d1dc: ("ext4: avoid declaring fs
inconsistent due to invalid file handles"). This was caused by a
botched reversal of the sense of the flag now known as
EXT4_IGET_SPECIAL (when it was previously named EXT4_IGET_NORMAL).
Fix the logic appropriately.
Fixes: 8a363970d1dc ("ext4: avoid declaring fs inconsistent...")
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: stable@kernel.org
---
fs/ext4/inode.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 165ff331d998..34d7e0703cc6 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -4834,7 +4834,7 @@ struct inode *__ext4_iget(struct super_block *sb, unsigned long ino,
gid_t i_gid;
projid_t i_projid;
- if (((flags & EXT4_IGET_NORMAL) &&
+ if ((!(flags & EXT4_IGET_SPECIAL) &&
(ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO)) ||
(ino < EXT4_ROOT_INO) ||
(ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count))) {
--
cgit v1.2.3-70-g09d2