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Registered in England and Wales under Company Registration No. 3798903 From: David Howells To: Steve French , Christian Brauner cc: dhowells@redhat.com, kernel test robot , Jeff Layton , Paulo Alcantara , linux-cifs@vger.kernel.org, netfs@lists.linux.dev, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] netfs, cifs: Fix mtime/ctime update for mmapped writes Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-ID: <2106016.1726559668.1@warthog.procyon.org.uk> Date: Tue, 17 Sep 2024 08:54:28 +0100 Message-ID: <2106017.1726559668@warthog.procyon.org.uk> X-Scanned-By: MIMEDefang 3.0 on 10.30.177.15 The cifs flag CIFS_INO_MODIFIED_ATTR, which indicates that the mtime and ctime need to be written back on close, got taken over by netfs as NETFS_ICTX_MODIFIED_ATTR to avoid the need to call a function pointer to set it. The flag gets set correctly on buffered writes, but doesn't get set by netfs_page_mkwrite(), leading to occasional failures in generic/080 and generic/215. Fix this by setting the flag in netfs_page_mkwrite(). Fixes: 73425800ac94 ("netfs, cifs: Move CIFS_INO_MODIFIED_ATTR to netfs_inode") Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-lkp/202409161629.98887b2-oliver.sang@intel.com Signed-off-by: David Howells cc: Jeff Layton cc: Steve French cc: Paulo Alcantara cc: linux-cifs@vger.kernel.org cc: netfs@lists.linux.dev cc: linux-fsdevel@vger.kernel.org Reviewed-by: Paulo Alcantara (Red Hat) --- fs/netfs/buffered_write.c | 1 + 1 file changed, 1 insertion(+) diff --git a/fs/netfs/buffered_write.c b/fs/netfs/buffered_write.c index d7eae597e54d..b3910dfcb56d 100644 --- a/fs/netfs/buffered_write.c +++ b/fs/netfs/buffered_write.c @@ -552,6 +552,7 @@ vm_fault_t netfs_page_mkwrite(struct vm_fault *vmf, struct netfs_group *netfs_gr trace_netfs_folio(folio, netfs_folio_trace_mkwrite); netfs_set_group(folio, netfs_group); file_update_time(file); + set_bit(NETFS_ICTX_MODIFIED_ATTR, &ictx->flags); if (ictx->ops->post_modify) ictx->ops->post_modify(inode); ret = VM_FAULT_LOCKED;