diff options
| author | Hongbo Li <lihongbo22@huawei.com> | 2024-06-20 21:21:12 +0800 |
|---|---|---|
| committer | Kent Overstreet <kent.overstreet@linux.dev> | 2024-06-22 17:26:03 -0400 |
| commit | 93f685e1e47ca9dd533ac94f4f8117d2d690cdac (patch) | |
| tree | b28c746e9cf957fc9cd00f584e79a8e29c719ca6 /fs | |
| parent | 70ab3e7becc8aa6ebecd40e85ee60687247b0193 (diff) | |
Add support for STATX_DIOALIGN to bcachefs, so that direct I/O alignment
restrictions are exposed to userspace in a generic way.
[Before]
```
./statx_test /mnt/bcachefs/test
statx(/mnt/bcachefs/test) = 0
dio mem align:0
dio offset align:0
```
[After]
```
./statx_test /mnt/bcachefs/test
statx(/mnt/bcachefs/test) = 0
dio mem align:1
dio offset align:512
```
Signed-off-by: Hongbo Li <lihongbo22@huawei.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/bcachefs/fs.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/fs/bcachefs/fs.c b/fs/bcachefs/fs.c index 32d9ff4d7c7c..fd01a5402c28 100644 --- a/fs/bcachefs/fs.c +++ b/fs/bcachefs/fs.c @@ -888,6 +888,16 @@ static int bch2_getattr(struct mnt_idmap *idmap, stat->subvol = inode->ei_subvol; stat->result_mask |= STATX_SUBVOL; + if ((request_mask & STATX_DIOALIGN) && S_ISREG(inode->v.i_mode)) { + stat->result_mask |= STATX_DIOALIGN; + /* + * this is incorrect; we should be tracking this in superblock, + * and checking the alignment of open devices + */ + stat->dio_mem_align = SECTOR_SIZE; + stat->dio_offset_align = block_bytes(c); + } + if (request_mask & STATX_BTIME) { stat->result_mask |= STATX_BTIME; stat->btime = bch2_time_to_timespec(c, inode->ei_inode.bi_otime); |