From 966ceafc7a437105ecfe1cadb3747b2965a260ca Mon Sep 17 00:00:00 2001 From: "Darrick J. Wong" Date: Mon, 15 Apr 2024 14:54:17 -0700 Subject: xfs: create deferred log items for file mapping exchanges Now that we've created the skeleton of a log intent item to track and restart file mapping exchange operations, add the upper level logic to commit intent items and turn them into concrete work recorded in the log. This builds on the existing bmap update intent items that have been around for a while now. Signed-off-by: Darrick J. Wong Reviewed-by: Christoph Hellwig --- fs/xfs/xfs_exchrange.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) (limited to 'fs/xfs/xfs_exchrange.c') diff --git a/fs/xfs/xfs_exchrange.c b/fs/xfs/xfs_exchrange.c index 4cd824e47f75..35351b973521 100644 --- a/fs/xfs/xfs_exchrange.c +++ b/fs/xfs/xfs_exchrange.c @@ -13,8 +13,57 @@ #include "xfs_inode.h" #include "xfs_trans.h" #include "xfs_exchrange.h" +#include "xfs_exchmaps.h" #include +/* Lock (and optionally join) two inodes for a file range exchange. */ +void +xfs_exchrange_ilock( + struct xfs_trans *tp, + struct xfs_inode *ip1, + struct xfs_inode *ip2) +{ + if (ip1 != ip2) + xfs_lock_two_inodes(ip1, XFS_ILOCK_EXCL, + ip2, XFS_ILOCK_EXCL); + else + xfs_ilock(ip1, XFS_ILOCK_EXCL); + if (tp) { + xfs_trans_ijoin(tp, ip1, 0); + if (ip2 != ip1) + xfs_trans_ijoin(tp, ip2, 0); + } + +} + +/* Unlock two inodes after a file range exchange operation. */ +void +xfs_exchrange_iunlock( + struct xfs_inode *ip1, + struct xfs_inode *ip2) +{ + if (ip2 != ip1) + xfs_iunlock(ip2, XFS_ILOCK_EXCL); + xfs_iunlock(ip1, XFS_ILOCK_EXCL); +} + +/* + * Estimate the resource requirements to exchange file contents between the two + * files. The caller is required to hold the IOLOCK and the MMAPLOCK and to + * have flushed both inodes' pagecache and active direct-ios. + */ +int +xfs_exchrange_estimate( + struct xfs_exchmaps_req *req) +{ + int error; + + xfs_exchrange_ilock(NULL, req->ip1, req->ip2); + error = xfs_exchmaps_estimate(req); + xfs_exchrange_iunlock(req->ip1, req->ip2); + return error; +} + /* * Generic code for exchanging ranges of two files via XFS_IOC_EXCHANGE_RANGE. * This part deals with struct file objects and byte ranges and does not deal -- cgit