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Wong" , Jaegeuk Kim , Jeff Layton , Johannes Thumshirn , linux-cifs@vger.kernel.org, , linux-f2fs-devel@lists.sourceforge.net, , , Miklos Szeredi , Steve French , Ted Tso , Matthew Wilcox , Jan Kara , "Darrick J. Wong" Subject: [PATCH 09/14] xfs: Convert double locking of MMAPLOCK to use VFS helpers Date: Mon, 7 Jun 2021 16:52:19 +0200 Message-Id: <20210607145236.31852-9-jack@suse.cz> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20210607144631.8717-1-jack@suse.cz> References: <20210607144631.8717-1-jack@suse.cz> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=4917; h=from:subject; bh=Xf/EluwecvDckS87lWRfy77OC8mUhzlKOvkojalUOxs=; b=owEBbQGS/pANAwAIAZydqgc/ZEDZAcsmYgBgvjKjGNBsDA4B/xWBG7QqXcuTTJ84ph+j2kRzoAje 0Eh8m9mJATMEAAEIAB0WIQSrWdEr1p4yirVVKBycnaoHP2RA2QUCYL4yowAKCRCcnaoHP2RA2Uh7CA DZbcBgGYIBPgI4e6MROhQ7DoBtFZkTvHXvvFzadqOPGkvDAkWZ7mKBrNWv6aRNNMkTBjw6uF7CuYOR AQk0lmW+6Cx7gK1uu5H9A96j7hXnKvCDYplEu4gG5Ac7LQTmWPNtFlG4gATfERUak58My8Ja2eDkLj r74P/RTyjlGIG5SLeKnqQAKaxk1qYZ7ILXWpX4U4VZ1J6U9X7uZYKaU7HfsZd5yqB+QADrj++hrsEG Kgr4bDYlseBkWLvTOGTVyaU+izvpq7aJNMbC+BoWwusx2fNABlDXJo0MDQiivDY0+75/9P3+OatqKt 5Bux1K4NKGY6+gr+NlJqaR6T1oEnwb X-Developer-Key: i=jack@suse.cz; a=openpgp; fpr=93C6099A142276A28BBE35D815BC833443038D8C Authentication-Results: imf22.hostedemail.com; dkim=pass header.d=suse.cz header.s=susede2_rsa header.b=ko9c25cM; dkim=pass header.d=suse.cz header.s=susede2_ed25519 header.b=zCJrGdMP; dmarc=none; spf=pass (imf22.hostedemail.com: domain of jack@suse.cz designates 195.135.220.29 as permitted sender) smtp.mailfrom=jack@suse.cz X-Stat-Signature: c984hxcnm6oetssk9suwuryknyygboan X-Rspamd-Queue-Id: 77D8EC00CBF7 X-Rspamd-Server: rspam02 X-HE-Tag: 1623077557-442630 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Convert places in XFS that take MMAPLOCK for two inodes to use helper VFS provides for it (filemap_invalidate_down_write_two()). Note that this changes lock ordering for MMAPLOCK from inode number based ordering to pointer based ordering VFS generally uses. CC: "Darrick J. Wong" Reviewed-by: Darrick J. Wong Signed-off-by: Jan Kara Reviewed-by: Darrick J. Wong --- fs/xfs/xfs_bmap_util.c | 15 ++++++++------- fs/xfs/xfs_inode.c | 37 +++++++++++-------------------------- 2 files changed, 19 insertions(+), 33 deletions(-) diff --git a/fs/xfs/xfs_bmap_util.c b/fs/xfs/xfs_bmap_util.c index a5e9d7d34023..7421d6ec4def 100644 --- a/fs/xfs/xfs_bmap_util.c +++ b/fs/xfs/xfs_bmap_util.c @@ -1582,7 +1582,6 @@ xfs_swap_extents( struct xfs_bstat *sbp = &sxp->sx_stat; int src_log_flags, target_log_flags; int error = 0; - int lock_flags; uint64_t f; int resblks = 0; unsigned int flags = 0; @@ -1594,8 +1593,8 @@ xfs_swap_extents( * do the rest of the checks. */ lock_two_nondirectories(VFS_I(ip), VFS_I(tip)); - lock_flags = XFS_MMAPLOCK_EXCL; - xfs_lock_two_inodes(ip, XFS_MMAPLOCK_EXCL, tip, XFS_MMAPLOCK_EXCL); + filemap_invalidate_lock_two(VFS_I(ip)->i_mapping, + VFS_I(tip)->i_mapping); /* Verify that both files have the same format */ if ((VFS_I(ip)->i_mode & S_IFMT) != (VFS_I(tip)->i_mode & S_IFMT)) { @@ -1667,7 +1666,6 @@ xfs_swap_extents( * or cancel will unlock the inodes from this point onwards. */ xfs_lock_two_inodes(ip, XFS_ILOCK_EXCL, tip, XFS_ILOCK_EXCL); - lock_flags |= XFS_ILOCK_EXCL; xfs_trans_ijoin(tp, ip, 0); xfs_trans_ijoin(tp, tip, 0); @@ -1786,13 +1784,16 @@ xfs_swap_extents( trace_xfs_swap_extent_after(ip, 0); trace_xfs_swap_extent_after(tip, 1); +out_unlock_ilock: + xfs_iunlock(ip, XFS_ILOCK_EXCL); + xfs_iunlock(tip, XFS_ILOCK_EXCL); out_unlock: - xfs_iunlock(ip, lock_flags); - xfs_iunlock(tip, lock_flags); + filemap_invalidate_unlock_two(VFS_I(ip)->i_mapping, + VFS_I(tip)->i_mapping); unlock_two_nondirectories(VFS_I(ip), VFS_I(tip)); return error; out_trans_cancel: xfs_trans_cancel(tp); - goto out_unlock; + goto out_unlock_ilock; } diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c index e1854a660809..0468f56f3bbb 100644 --- a/fs/xfs/xfs_inode.c +++ b/fs/xfs/xfs_inode.c @@ -556,12 +556,10 @@ xfs_lock_inodes( } /* - * xfs_lock_two_inodes() can only be used to lock one type of lock at a time - - * the mmaplock or the ilock, but not more than one type at a time. If we lock - * more than one at a time, lockdep will report false positives saying we have - * violated locking orders. The iolock must be double-locked separately since - * we use i_rwsem for that. We now support taking one lock EXCL and the other - * SHARED. + * xfs_lock_two_inodes() can only be used to lock ilock. The iolock and + * mmaplock must be double-locked separately since we use i_rwsem and + * invalidate_lock for that. We now support taking one lock EXCL and the + * other SHARED. */ void xfs_lock_two_inodes( @@ -579,15 +577,8 @@ xfs_lock_two_inodes( ASSERT(hweight32(ip1_mode) == 1); ASSERT(!(ip0_mode & (XFS_IOLOCK_SHARED|XFS_IOLOCK_EXCL))); ASSERT(!(ip1_mode & (XFS_IOLOCK_SHARED|XFS_IOLOCK_EXCL))); - ASSERT(!(ip0_mode & (XFS_MMAPLOCK_SHARED|XFS_MMAPLOCK_EXCL)) || - !(ip0_mode & (XFS_ILOCK_SHARED|XFS_ILOCK_EXCL))); - ASSERT(!(ip1_mode & (XFS_MMAPLOCK_SHARED|XFS_MMAPLOCK_EXCL)) || - !(ip1_mode & (XFS_ILOCK_SHARED|XFS_ILOCK_EXCL))); - ASSERT(!(ip1_mode & (XFS_MMAPLOCK_SHARED|XFS_MMAPLOCK_EXCL)) || - !(ip0_mode & (XFS_ILOCK_SHARED|XFS_ILOCK_EXCL))); - ASSERT(!(ip0_mode & (XFS_MMAPLOCK_SHARED|XFS_MMAPLOCK_EXCL)) || - !(ip1_mode & (XFS_ILOCK_SHARED|XFS_ILOCK_EXCL))); - + ASSERT(!(ip0_mode & (XFS_MMAPLOCK_SHARED|XFS_MMAPLOCK_EXCL))); + ASSERT(!(ip1_mode & (XFS_MMAPLOCK_SHARED|XFS_MMAPLOCK_EXCL))); ASSERT(ip0->i_ino != ip1->i_ino); if (ip0->i_ino > ip1->i_ino) { @@ -3750,11 +3741,8 @@ xfs_ilock2_io_mmap( ret = xfs_iolock_two_inodes_and_break_layout(VFS_I(ip1), VFS_I(ip2)); if (ret) return ret; - if (ip1 == ip2) - xfs_ilock(ip1, XFS_MMAPLOCK_EXCL); - else - xfs_lock_two_inodes(ip1, XFS_MMAPLOCK_EXCL, - ip2, XFS_MMAPLOCK_EXCL); + filemap_invalidate_lock_two(VFS_I(ip1)->i_mapping, + VFS_I(ip2)->i_mapping); return 0; } @@ -3764,12 +3752,9 @@ xfs_iunlock2_io_mmap( struct xfs_inode *ip1, struct xfs_inode *ip2) { - bool same_inode = (ip1 == ip2); - - xfs_iunlock(ip2, XFS_MMAPLOCK_EXCL); - if (!same_inode) - xfs_iunlock(ip1, XFS_MMAPLOCK_EXCL); + filemap_invalidate_unlock_two(VFS_I(ip1)->i_mapping, + VFS_I(ip2)->i_mapping); inode_unlock(VFS_I(ip2)); - if (!same_inode) + if (ip1 != ip2) inode_unlock(VFS_I(ip1)); }