From: John Garry <john.g.garry@oracle.com>
To: david@fromorbit.com, djwong@kernel.org, hch@lst.de,
viro@zeniv.linux.org.uk, brauner@kernel.org, jack@suse.cz,
chandan.babu@oracle.com, willy@infradead.org
Cc: axboe@kernel.dk, martin.petersen@oracle.com,
linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
tytso@mit.edu, jbongio@google.com, ojaswin@linux.ibm.com,
ritesh.list@gmail.com, mcgrof@kernel.org, p.raghav@samsung.com,
linux-xfs@vger.kernel.org, catherine.hoang@oracle.com,
John Garry <john.g.garry@oracle.com>
Subject: [PATCH v3 20/21] xfs: Validate atomic writes
Date: Mon, 29 Apr 2024 17:47:45 +0000 [thread overview]
Message-ID: <20240429174746.2132161-21-john.g.garry@oracle.com> (raw)
In-Reply-To: <20240429174746.2132161-1-john.g.garry@oracle.com>
Validate that an atomic write adheres to length/offset rules. Since we
require extent alignment for atomic writes, this effectively also enforces
that the BIO which iomap produces is aligned.
For an IOCB with IOCB_ATOMIC set to get as far as xfs_file_dio_write(),
FMODE_CAN_ATOMIC_WRITE will need to be set for the file; for this,
FORCEALIGN and also ATOMICWRITES flags would also need to be set for the
inode.
Signed-off-by: John Garry <john.g.garry@oracle.com>
---
fs/xfs/xfs_file.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index ee4f94cf6f4e..256d05c1be6a 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -712,12 +712,20 @@ xfs_file_dio_write(
struct kiocb *iocb,
struct iov_iter *from)
{
- struct xfs_inode *ip = XFS_I(file_inode(iocb->ki_filp));
+ struct inode *inode = file_inode(iocb->ki_filp);
+ struct xfs_inode *ip = XFS_I(inode);
struct xfs_buftarg *target = xfs_inode_buftarg(ip);
size_t count = iov_iter_count(from);
struct xfs_mount *mp = ip->i_mount;
unsigned int blockmask;
+ if (iocb->ki_flags & IOCB_ATOMIC) {
+ if (!generic_atomic_write_valid_size(iocb->ki_pos, from,
+ i_blocksize(inode), XFS_FSB_TO_B(mp, ip->i_extsize))) {
+ return -EINVAL;
+ }
+ }
+
/* direct I/O must be aligned to device logical sector size */
if ((iocb->ki_pos | count) & target->bt_logical_sectormask)
return -EINVAL;
--
2.31.1
next prev parent reply other threads:[~2024-04-29 17:50 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-29 17:47 [PATCH v3 00/21] block atomic writes for XFS John Garry
2024-04-29 17:47 ` [PATCH v3 01/21] fs: Add generic_atomic_write_valid_size() John Garry
2024-04-29 17:47 ` [PATCH v3 02/21] xfs: only allow minlen allocations when near ENOSPC John Garry
2024-04-29 17:47 ` [PATCH v3 03/21] xfs: always tail align maxlen allocations John Garry
2024-04-29 17:47 ` [PATCH v3 04/21] xfs: simplify extent allocation alignment John Garry
2024-04-29 17:47 ` [PATCH v3 05/21] xfs: make EOF allocation simpler John Garry
2024-04-29 17:47 ` [PATCH v3 06/21] xfs: introduce forced allocation alignment John Garry
2024-04-29 17:47 ` [PATCH v3 07/21] fs: xfs: align args->minlen for " John Garry
2024-06-05 14:26 ` John Garry
2024-06-06 8:47 ` Dave Chinner
2024-06-06 16:22 ` John Garry
2024-06-07 6:04 ` John Garry
2024-04-29 17:47 ` [PATCH v3 08/21] xfs: Introduce FORCEALIGN inode flag John Garry
2024-04-30 23:22 ` Dave Chinner
2024-05-01 10:03 ` John Garry
2024-05-02 0:50 ` Dave Chinner
2024-05-02 7:56 ` John Garry
2024-06-12 2:10 ` Long Li
2024-06-12 6:55 ` John Garry
2024-04-29 17:47 ` [PATCH v3 09/21] xfs: Do not free EOF blocks for forcealign John Garry
2024-04-30 22:54 ` Dave Chinner
2024-05-01 8:30 ` John Garry
2024-05-02 1:11 ` Dave Chinner
2024-05-02 8:55 ` John Garry
2024-04-29 17:47 ` [PATCH v3 10/21] xfs: Update xfs_is_falloc_aligned() mask " John Garry
2024-04-30 23:35 ` Dave Chinner
2024-05-01 10:48 ` John Garry
2024-05-01 23:45 ` Darrick J. Wong
2024-04-29 17:47 ` [PATCH RFC v3 11/21] xfs: Unmap blocks according to forcealign John Garry
2024-05-01 0:10 ` Dave Chinner
2024-05-01 10:54 ` John Garry
2024-06-06 9:50 ` John Garry
2024-04-29 17:47 ` [PATCH RFC v3 12/21] xfs: Only free full extents for forcealign John Garry
2024-05-01 0:53 ` Dave Chinner
2024-05-01 11:24 ` John Garry
2024-05-01 23:53 ` Darrick J. Wong
2024-05-02 3:12 ` Dave Chinner
2024-04-29 17:47 ` [PATCH v3 13/21] xfs: Enable file data forcealign feature John Garry
2024-04-29 17:47 ` [PATCH v3 14/21] iomap: Sub-extent zeroing John Garry
2024-05-01 1:07 ` Dave Chinner
2024-05-01 10:23 ` John Garry
2024-05-30 10:40 ` John Garry
2024-06-11 3:10 ` Long Li
2024-06-11 7:29 ` John Garry
2024-04-29 17:47 ` [PATCH v3 15/21] fs: xfs: " John Garry
2024-05-01 1:32 ` Dave Chinner
2024-05-01 11:36 ` John Garry
2024-05-02 1:26 ` Dave Chinner
2024-04-29 17:47 ` [PATCH v3 16/21] fs: Add FS_XFLAG_ATOMICWRITES flag John Garry
2024-04-29 17:47 ` [PATCH v3 17/21] iomap: Atomic write support John Garry
2024-05-01 1:47 ` Dave Chinner
2024-05-01 11:08 ` John Garry
2024-05-02 1:43 ` Dave Chinner
2024-05-02 9:12 ` John Garry
2024-04-29 17:47 ` [PATCH v3 18/21] xfs: Support FS_XFLAG_ATOMICWRITES for forcealign John Garry
2024-04-29 17:47 ` [PATCH v3 19/21] xfs: Support atomic write for statx John Garry
2024-04-29 17:47 ` John Garry [this message]
2024-04-29 17:47 ` [PATCH v3 21/21] xfs: Support setting FMODE_CAN_ATOMIC_WRITE John Garry
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