From 68c522afd0b1936b48a03a4c8b81261e7597c62d Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Thu, 8 Sep 2022 18:14:19 -0400 Subject: NFSD: Make nfsd4_rename() wait before returning NFS4ERR_DELAY nfsd_rename() can kick off a CB_RECALL (via vfs_rename() -> leases_conflict()) if a delegation is present. Before returning NFS4ERR_DELAY, give the client holding that delegation a chance to return it and then retry the nfsd_rename() again, once. This version of the patch handles renaming an existing file, but does not deal with renaming onto an existing file. That case will still always trigger an NFS4ERR_DELAY. Link: https://bugzilla.linux-nfs.org/show_bug.cgi?id=354 Tested-by: Igor Mammedov Signed-off-by: Chuck Lever Reviewed-by: Jeff Layton --- fs/nfsd/vfs.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) (limited to 'fs/nfsd') diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index d4db595d33ea..7d86ed235359 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -1696,7 +1696,15 @@ retry: .new_dir = tdir, .new_dentry = ndentry, }; - host_err = vfs_rename(&rd); + int retries; + + for (retries = 1;;) { + host_err = vfs_rename(&rd); + if (host_err != -EAGAIN || !retries--) + break; + if (!nfsd_wait_for_delegreturn(rqstp, d_inode(odentry))) + break; + } if (!host_err) { host_err = commit_metadata(tfhp); if (!host_err) -- cgit v1.2.3