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| author | Dai Ngo <dai.ngo@oracle.com> | 2021-05-21 22:09:37 +0300 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2021-05-26 00:06:51 +0300 |
| commit | f4e44b393389c77958f7c58bf4415032b4cda15b (patch) | |
| tree | 44bb946e81e134a5ae0487807f1324f4d4709951 /fs/nfsd/netns.h | |
| parent | eac0b17a77fbd763d305a5eaa4fd1119e5a0fe0d (diff) | |
| download | linux-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/netns.h')
| -rw-r--r-- | fs/nfsd/netns.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/nfsd/netns.h b/fs/nfsd/netns.h index a75abeb1e698..935c1028c217 100644 --- a/fs/nfsd/netns.h +++ b/fs/nfsd/netns.h @@ -176,6 +176,12 @@ struct nfsd_net { unsigned int longest_chain_cachesize; struct shrinker nfsd_reply_cache_shrinker; + + /* tracking server-to-server copy mounts */ + spinlock_t nfsd_ssc_lock; + struct list_head nfsd_ssc_mount_list; + wait_queue_head_t nfsd_ssc_waitq; + /* utsname taken from the process that starts the server */ char nfsd_name[UNX_MAXNODENAME+1]; }; |