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authorDai Ngo <dai.ngo@oracle.com>2021-05-21 22:09:37 +0300
committerJ. Bruce Fields <bfields@redhat.com>2021-05-26 00:06:51 +0300
commitf4e44b393389c77958f7c58bf4415032b4cda15b (patch)
tree44bb946e81e134a5ae0487807f1324f4d4709951 /fs/nfsd/nfssvc.c
parenteac0b17a77fbd763d305a5eaa4fd1119e5a0fe0d (diff)
downloadlinux-f4e44b393389c77958f7c58bf4415032b4cda15b.tar.xz
NFSD: delay unmount source's export after inter-server copy completed.
Currently the source's export is mounted and unmounted on every inter-server copy operation. This patch is an enhancement to delay the unmount of the source export for a certain period of time to eliminate the mount and unmount overhead on subsequent copy operations. After a copy operation completes, a work entry is added to the delayed unmount list with an expiration time. This list is serviced by the laundromat thread to unmount the export of the expired entries. Each time the export is being used again, its expiration time is extended and the entry is re-inserted to the tail of the list. The unmount task and the mount operation of the copy request are synced to make sure the export is not unmounted while it's being used. Signed-off-by: Dai Ngo <dai.ngo@oracle.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'fs/nfsd/nfssvc.c')
-rw-r--r--fs/nfsd/nfssvc.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c
index dd5d69921676..ccb59e91011b 100644
--- a/fs/nfsd/nfssvc.c
+++ b/fs/nfsd/nfssvc.c
@@ -403,6 +403,9 @@ static int nfsd_startup_net(struct net *net, const struct cred *cred)
if (ret)
goto out_filecache;
+#ifdef CONFIG_NFSD_V4_2_INTER_SSC
+ nfsd4_ssc_init_umount_work(nn);
+#endif
nn->nfsd_net_up = true;
return 0;