diff options
| author | John Garry <john.g.garry@oracle.com> | 2024-11-04 16:14:03 -0800 |
|---|---|---|
| committer | Darrick J. Wong <djwong@djwong.org> | 2024-11-04 16:22:10 -0800 |
| commit | 6432c6e723fffd93e5cb65117ff48a3aa734e259 (patch) | |
| tree | 8290fcd3caca0e27b93ebf9b52b4bcb71f03d7e2 /fs/xfs/xfs_iops.c | |
| parent | 9e0933c21c128d6d8ac4d8aae0babaf9a43100b8 (diff) | |
xfs: Support atomic write for statx
Support providing info on atomic write unit min and max for an inode.
For simplicity, currently we limit the min at the FS block size. As for
max, we limit also at FS block size, as there is no current method to
guarantee extent alignment or granularity for regular files.
Reviewed-by: "Darrick J. Wong" <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: John Garry <john.g.garry@oracle.com>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Diffstat (limited to 'fs/xfs/xfs_iops.c')
| -rw-r--r-- | fs/xfs/xfs_iops.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c index ee79cf161312..5cd804812efd 100644 --- a/fs/xfs/xfs_iops.c +++ b/fs/xfs/xfs_iops.c @@ -570,6 +570,20 @@ xfs_stat_blksize( return max_t(uint32_t, PAGE_SIZE, mp->m_sb.sb_blocksize); } +static void +xfs_get_atomic_write_attr( + struct xfs_inode *ip, + unsigned int *unit_min, + unsigned int *unit_max) +{ + if (!xfs_inode_can_atomicwrite(ip)) { + *unit_min = *unit_max = 0; + return; + } + + *unit_min = *unit_max = ip->i_mount->m_sb.sb_blocksize; +} + STATIC int xfs_vn_getattr( struct mnt_idmap *idmap, @@ -643,6 +657,14 @@ xfs_vn_getattr( stat->dio_mem_align = bdev_dma_alignment(bdev) + 1; stat->dio_offset_align = bdev_logical_block_size(bdev); } + if (request_mask & STATX_WRITE_ATOMIC) { + unsigned int unit_min, unit_max; + + xfs_get_atomic_write_attr(ip, &unit_min, + &unit_max); + generic_fill_statx_atomic_writes(stat, + unit_min, unit_max); + } fallthrough; default: stat->blksize = xfs_stat_blksize(ip); |