[PATCH v5 7/8] f2fs: support STATX_DIOALIGN
STALE1444d
LANDED
From: Eric Biggers <ebiggers@kernel.org>
Date: 2022-08-27 07:02:12
Also in:
linux-api, linux-ext4, linux-f2fs-devel, linux-fscrypt, linux-fsdevel, linux-xfs, lkml
Subsystem:
f2fs file system, filesystems (vfs and infrastructure), the rest · Maintainers:
Jaegeuk Kim, Chao Yu, Alexander Viro, Christian Brauner, Linus Torvalds
Revision v5 of 3 in this series; landed in mainline as c8c02272a9f7 on 2022-09-12.
Revisions (3)
- v3 [diff vs current]
- v4 [diff vs current]
- v5 current
From: Eric Biggers <redacted> Add support for STATX_DIOALIGN to f2fs, so that direct I/O alignment restrictions are exposed to userspace in a generic way. Signed-off-by: Eric Biggers <redacted> --- fs/f2fs/file.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+)
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 8e11311db21060..79177050732803 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c@@ -847,6 +847,24 @@ int f2fs_getattr(struct user_namespace *mnt_userns, const struct path *path, stat->btime.tv_nsec = fi->i_crtime.tv_nsec; } + /* + * Return the DIO alignment restrictions if requested. We only return + * this information when requested, since on encrypted files it might + * take a fair bit of work to get if the file wasn't opened recently. + * + * f2fs sometimes supports DIO reads but not DIO writes. STATX_DIOALIGN + * cannot represent that, so in that case we report no DIO support. + */ + if ((request_mask & STATX_DIOALIGN) && S_ISREG(inode->i_mode)) { + unsigned int bsize = i_blocksize(inode); + + stat->result_mask |= STATX_DIOALIGN; + if (!f2fs_force_buffered_io(inode, WRITE)) { + stat->dio_mem_align = bsize; + stat->dio_offset_align = bsize; + } + } + flags = fi->i_flags; if (flags & F2FS_COMPR_FL) stat->attributes |= STATX_ATTR_COMPRESSED;
--
2.37.2