From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 51FAD2459FF; Sun, 27 Jul 2025 18:36:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753641398; cv=none; b=svau0CNObDTosT2iuTXUhtbjFt/hMkQGIRr3NtD3trE/F+YrPgv5qeCg7D6o2Bj+RTTanmZe29XJAe7p7BabqfPCEUZJiqxi6+wVitvuetONDCppZA3k9BKIzcy+9irS+8QwgcOQytMBqRl2+if8Hd067/IMp1XD9jzkqPLQoT4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753641398; c=relaxed/simple; bh=NtCz+vb0FJ2RTT3UYGTBXP803cbE2/PCFHkn1707tww=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=JwR22secm1d8n4NcHeRAoIKWBpk8g9BNZ8RjUF51wnSSNmZLchV44lLPEn/axRbCbS895heupjzo/WPrc2btSC8cieszRN6NrYoB1JFehK/+UH4hRds9rE8C5tLxldoKTySHuKD146bzWVkT4MbeQF4l97obFmEKZj2/Cbuy3zo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=hJxI2cuI; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="hJxI2cuI" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 868EFC4CEF7; Sun, 27 Jul 2025 18:36:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1753641396; bh=NtCz+vb0FJ2RTT3UYGTBXP803cbE2/PCFHkn1707tww=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=hJxI2cuI3DH1/GIEw48+EX0DquTB2rcTDTVYd2LzNqLQvaSW5csGhfD5SJLpYDR2X qqNQt+hr1nBKBz+m44WjEaf1VTrUZ8MbHj+KxfLu7YlXmG0KN/AgOk3MEX+bJRsJJX o2FpekAQvWSOMtQlm2CPoMDCunj4nwaBwDcBlek2WDwtNHPlpoUyBbBx+laysnAVPO BcSD7qDV2zAfOgnf0ySFr7tAcektGQ+GDKsefiiF4iseB1O2QfpU38V0/8hMaB6iis 9tIPm3u28M8DzhHlFvVPiFVAZWfoEAEoqeuVfjY9xMIS/H6iCcSlLcGZjNQPk6LZGc J7Uxrbd/w6OEg== From: Jeff Layton Date: Sun, 27 Jul 2025 14:36:18 -0400 Subject: [PATCH v3 8/8] vfs: remove inode_set_ctime_deleg() Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20250727-nfsd-testing-v3-8-8dc2aafb166d@kernel.org> References: <20250727-nfsd-testing-v3-0-8dc2aafb166d@kernel.org> In-Reply-To: <20250727-nfsd-testing-v3-0-8dc2aafb166d@kernel.org> To: Alexander Viro , Christian Brauner , Jan Kara , Steven Rostedt , Masami Hiramatsu , Mathieu Desnoyers , Chuck Lever , NeilBrown , Olga Kornievskaia , Dai Ngo , Tom Talpey Cc: Trond Myklebust , Anna Schumaker , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-nfs@vger.kernel.org, Jeff Layton X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=5364; i=jlayton@kernel.org; h=from:subject:message-id; bh=NtCz+vb0FJ2RTT3UYGTBXP803cbE2/PCFHkn1707tww=; b=owEBbQKS/ZANAwAKAQAOaEEZVoIVAcsmYgBohnGmVnNPJR2xq+uhg+XDinapempnHwq02CRdG G7IljsE3aSJAjMEAAEKAB0WIQRLwNeyRHGyoYTq9dMADmhBGVaCFQUCaIZxpgAKCRAADmhBGVaC FcRFD/9zexmP3yDw4Z14LO6Gzhk/HVFHrShGljNob9av+LPXX4l29eWRPkIE502/U1T3PgE30Fy DQap8/lMB7waZf7pZRym1xDH28IWwu2yVBpEnUJr3euwjvaodNxoMOXfwFeexHC8S1dFrrkSUN6 CpuO3q5dwnDnX2JLg08xNazziE5NClFL8ok13b2d0IOD8UNu+ptYwIjl//TdJau9mFmOaqjXHG2 RcxQwUwkmvZjLWJ2THHEYi03qz21cbGxiVQ5yf+OgiYmWX8szJVJhwsRYeNc/YanxGvm/jY1sIT Qz0i9/gQZXkOHdp2jT9FNu9QOLHv3aX6SPPb6Oc7u8TzkcmwpCvWAV5QBTceYCO9dUTE1fOxaOR RPOviTRbW4jFGlTp+yGTlG6+KLRxIdeOdmxleyygswAig2ZnNyiiMhMrxiZjuE1u632mUztcuZZ Oyb589tos4GZu6vKnpeXr6ldd9kdJX4ZwMnWRtW05azDfM2xOCpWE/lbqc3fa6IuZ0pJ7csA0gz O9s33vH/haXv6ernDjQRyMPYTiCQ8jrIBOgpD4cQ3d0lDpGUuasCqpP1ivApbY33SJR9GJykVyx sbeSM/p5DIHapuoUUjXBr5dc8U2RIYyxXayIoklapVPn/fCbvLnvtLB6AYeWarSU7/wjICKybvX wS+j3T7WEEGRx0g== X-Developer-Key: i=jlayton@kernel.org; a=openpgp; fpr=4BC0D7B24471B2A184EAF5D3000E684119568215 Now that nfsd is vetting the timestamps internally, there is no need for this function. If ATTR_DELEG is set, then skip the multigrain update and set what was requested. Signed-off-by: Jeff Layton --- fs/attr.c | 19 +++----------- fs/inode.c | 73 ------------------------------------------------------ include/linux/fs.h | 2 -- 3 files changed, 4 insertions(+), 90 deletions(-) diff --git a/fs/attr.c b/fs/attr.c index f0dabd2985989d283a931536a5fc53eda366b373..e75f06b760015640bafd596457cd14c746c7e272 100644 --- a/fs/attr.c +++ b/fs/attr.c @@ -287,14 +287,7 @@ static void setattr_copy_mgtime(struct inode *inode, const struct iattr *attr) struct timespec64 now; if (ia_valid & ATTR_CTIME) { - /* - * In the case of an update for a write delegation, we must respect - * the value in ia_ctime and not use the current time. - */ - if (ia_valid & ATTR_DELEG) - now = inode_set_ctime_deleg(inode, attr->ia_ctime); - else - now = inode_set_ctime_current(inode); + now = inode_set_ctime_current(inode); } else { /* If ATTR_CTIME isn't set, then ATTR_MTIME shouldn't be either. */ WARN_ON_ONCE(ia_valid & ATTR_MTIME); @@ -352,19 +345,15 @@ void setattr_copy(struct mnt_idmap *idmap, struct inode *inode, inode->i_mode = mode; } - if (is_mgtime(inode)) + if (!(ia_valid & ATTR_DELEG) && is_mgtime(inode)) return setattr_copy_mgtime(inode, attr); if (ia_valid & ATTR_ATIME) inode_set_atime_to_ts(inode, attr->ia_atime); if (ia_valid & ATTR_MTIME) inode_set_mtime_to_ts(inode, attr->ia_mtime); - if (ia_valid & ATTR_CTIME) { - if (ia_valid & ATTR_DELEG) - inode_set_ctime_deleg(inode, attr->ia_ctime); - else - inode_set_ctime_to_ts(inode, attr->ia_ctime); - } + if (ia_valid & ATTR_CTIME) + inode_set_ctime_to_ts(inode, attr->ia_ctime); } EXPORT_SYMBOL(setattr_copy); diff --git a/fs/inode.c b/fs/inode.c index 99318b157a9a13b3dd8dad0f5f90951f08ef64de..f45054fe48b8a0339e60fd2aa17daaad5a7957e7 100644 --- a/fs/inode.c +++ b/fs/inode.c @@ -2783,79 +2783,6 @@ struct timespec64 inode_set_ctime_current(struct inode *inode) } EXPORT_SYMBOL(inode_set_ctime_current); -/** - * inode_set_ctime_deleg - try to update the ctime on a delegated inode - * @inode: inode to update - * @update: timespec64 to set the ctime - * - * Attempt to atomically update the ctime on behalf of a delegation holder. - * - * The nfs server can call back the holder of a delegation to get updated - * inode attributes, including the mtime. When updating the mtime, update - * the ctime to a value at least equal to that. - * - * This can race with concurrent updates to the inode, in which - * case the update is skipped. - * - * Note that this works even when multigrain timestamps are not enabled, - * so it is used in either case. - */ -struct timespec64 inode_set_ctime_deleg(struct inode *inode, struct timespec64 update) -{ - struct timespec64 now, cur_ts; - u32 cur, old; - - /* pairs with try_cmpxchg below */ - cur = smp_load_acquire(&inode->i_ctime_nsec); - cur_ts.tv_nsec = cur & ~I_CTIME_QUERIED; - cur_ts.tv_sec = inode->i_ctime_sec; - - /* If the update is older than the existing value, skip it. */ - if (timespec64_compare(&update, &cur_ts) <= 0) - return cur_ts; - - ktime_get_coarse_real_ts64_mg(&now); - - /* Clamp the update to "now" if it's in the future */ - if (timespec64_compare(&update, &now) > 0) - update = now; - - update = timestamp_truncate(update, inode); - - /* No need to update if the values are already the same */ - if (timespec64_equal(&update, &cur_ts)) - return cur_ts; - - /* - * Try to swap the nsec value into place. If it fails, that means - * it raced with an update due to a write or similar activity. That - * stamp takes precedence, so just skip the update. - */ -retry: - old = cur; - if (try_cmpxchg(&inode->i_ctime_nsec, &cur, update.tv_nsec)) { - inode->i_ctime_sec = update.tv_sec; - mgtime_counter_inc(mg_ctime_swaps); - return update; - } - - /* - * Was the change due to another task marking the old ctime QUERIED? - * - * If so, then retry the swap. This can only happen once since - * the only way to clear I_CTIME_QUERIED is to stamp the inode - * with a new ctime. - */ - if (!(old & I_CTIME_QUERIED) && (cur == (old | I_CTIME_QUERIED))) - goto retry; - - /* Otherwise, it was a new timestamp. */ - cur_ts.tv_sec = inode->i_ctime_sec; - cur_ts.tv_nsec = cur & ~I_CTIME_QUERIED; - return cur_ts; -} -EXPORT_SYMBOL(inode_set_ctime_deleg); - /** * in_group_or_capable - check whether caller is CAP_FSETID privileged * @idmap: idmap of the mount @inode was found from diff --git a/include/linux/fs.h b/include/linux/fs.h index f18f45e88545c39716b917b1378fb7248367b41d..08f2d813dd40b5dd4fe07d9636e94252915d6235 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1657,8 +1657,6 @@ static inline bool fsuidgid_has_mapping(struct super_block *sb, struct timespec64 current_time(struct inode *inode); struct timespec64 inode_set_ctime_current(struct inode *inode); -struct timespec64 inode_set_ctime_deleg(struct inode *inode, - struct timespec64 update); static inline time64_t inode_get_atime_sec(const struct inode *inode) { -- 2.50.1