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| author | Dai Ngo <dai.ngo@oracle.com> | 2021-05-21 21:09:37 +0200 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2021-05-25 23:06:51 +0200 |
| commit | f4e44b393389c77958f7c58bf4415032b4cda15b (patch) | |
| tree | 44bb946e81e134a5ae0487807f1324f4d4709951 /fs/nfsd/nfsd.h | |
| parent | NFSD add vfs_fsync after async copy is done (diff) | |
| download | linux-f4e44b393389c77958f7c58bf4415032b4cda15b.tar.xz linux-f4e44b393389c77958f7c58bf4415032b4cda15b.zip | |
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/nfsd.h')
| -rw-r--r-- | fs/nfsd/nfsd.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/nfsd/nfsd.h b/fs/nfsd/nfsd.h index 14dbfa75059d..9664303afdaf 100644 --- a/fs/nfsd/nfsd.h +++ b/fs/nfsd/nfsd.h @@ -484,6 +484,10 @@ static inline bool nfsd_attrs_supported(u32 minorversion, const u32 *bmval) extern int nfsd4_is_junction(struct dentry *dentry); extern int register_cld_notifier(void); extern void unregister_cld_notifier(void); +#ifdef CONFIG_NFSD_V4_2_INTER_SSC +extern void nfsd4_ssc_init_umount_work(struct nfsd_net *nn); +#endif + #else /* CONFIG_NFSD_V4 */ static inline int nfsd4_is_junction(struct dentry *dentry) { |