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Message-id: <166125468756.23264.2859374883806269821@noble.neil.brown.name> Date: Tue, 23 Aug 2022 21:38:07 +1000 From: "NeilBrown" <neilb@...e.de> To: "Jeff Layton" <jlayton@...nel.org> Cc: "Dave Chinner" <david@...morbit.com>, "Mimi Zohar" <zohar@...ux.ibm.com>, linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org, linux-integrity@...r.kernel.org, linux-nfs@...r.kernel.org, linux-xfs@...r.kernel.org, linux-ext4@...r.kernel.org, "Trond Myklebust" <trondmy@...merspace.com> Subject: Re: [PATCH] iversion: update comments with info about atime updates On Tue, 23 Aug 2022, Jeff Layton wrote: > So, we can refer to that and simply say: > > "If the function updates the mtime or ctime on the inode, then the > i_version should be incremented. If only the atime is being updated, > then the i_version should not be incremented. The exception to this rule > is explicit atime updates via utimes() or similar mechanism, which > should result in the i_version being incremented." Is that exception needed? utimes() updates ctime. https://man7.org/linux/man-pages/man2/utimes.2.html doesn't say that, but https://pubs.opengroup.org/onlinepubs/007904875/functions/utimes.html does, as does the code. NeilBrown
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