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fs: add support for non-blocking timestamp updates

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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>
This commit is contained in:
Christoph Hellwig
2026-01-08 15:19:08 +01:00
committed by Christian Brauner
parent 5cf06ea56e
commit 85c871a02b
7 changed files with 50 additions and 11 deletions
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3
fs/orangefs/inode.c
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@@ -878,6 +878,9 @@ int orangefs_update_time(struct inode *inode, enum fs_update_time type,
struct iattr iattr = { };
int dirty;
if (flags & IOCB_NOWAIT)
return -EAGAIN;
switch (type) {
case FS_UPD_ATIME:
iattr.ia_valid = ATTR_ATIME;