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| author | Christoph Hellwig <hch@lst.de> | 2026-01-08 15:19:08 +0100 |
|---|---|---|
| committer | Christian Brauner <brauner@kernel.org> | 2026-01-12 14:01:33 +0100 |
| commit | 85c871a02b0305f568d5aba6144fc6b2c96bd87d (patch) | |
| tree | c50d9d4be66de0b9925140597f9b15265de939b3 /fs/overlayfs | |
| parent | 5cf06ea56ee67209d4e9a0b381641fb062ecd2c3 (diff) | |
| download | lwn-85c871a02b0305f568d5aba6144fc6b2c96bd87d.tar.gz lwn-85c871a02b0305f568d5aba6144fc6b2c96bd87d.zip | |
fs: add support for non-blocking timestamp updates
Currently file_update_time_flags unconditionally returns -EAGAIN if any
timestamp needs to be updated and IOCB_NOWAIT is passed. This makes
non-blocking direct writes impossible on file systems with granular
enough timestamps.
Pass IOCB_NOWAIT to ->update_time and return -EAGAIN if it could block.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://patch.msgid.link/20260108141934.2052404-9-hch@lst.de
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Diffstat (limited to 'fs/overlayfs')
| -rw-r--r-- | fs/overlayfs/inode.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c index c0ce3519e4af..00c69707bda9 100644 --- a/fs/overlayfs/inode.c +++ b/fs/overlayfs/inode.c @@ -566,6 +566,8 @@ int ovl_update_time(struct inode *inode, enum fs_update_time type, }; if (upperpath.dentry) { + if (flags & IOCB_NOWAIT) + return -EAGAIN; touch_atime(&upperpath); inode_set_atime_to_ts(inode, inode_get_atime(d_inode(upperpath.dentry))); |