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| author | Tom Haynes <thomas.haynes@primarydata.com> | 2016-05-25 07:31:12 -0700 |
|---|---|---|
| committer | Anna Schumaker <Anna.Schumaker@Netapp.com> | 2016-05-25 13:35:20 -0400 |
| commit | fb1084e3320555eca0fb86c9eaad5429ee761282 (patch) | |
| tree | af933ba8ce9a6e2fc1f136c62350055bcb29c2ec /fs/nfs/flexfilelayout/flexfilelayoutdev.c | |
| parent | ade8febde0271513360bac44883dbebad44276c3 (diff) | |
| download | op-kernel-dev-fb1084e3320555eca0fb86c9eaad5429ee761282.zip op-kernel-dev-fb1084e3320555eca0fb86c9eaad5429ee761282.tar.gz | |
nfs/flexfiles: Helper function to detect FF_FLAGS_NO_READ_IO
The mds can inform the client not to use the IOMODE_RW layout
segment for doing READs. I.e., it is basically a
IOMODE_WRITE layout segment.
It would do this to not interfere with the WRITEs.
Signed-off-by: Tom Haynes <loghyr@primarydata.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'fs/nfs/flexfilelayout/flexfilelayoutdev.c')
| -rw-r--r-- | fs/nfs/flexfilelayout/flexfilelayoutdev.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/nfs/flexfilelayout/flexfilelayoutdev.c b/fs/nfs/flexfilelayout/flexfilelayoutdev.c index 35d84d0..0aa36be 100644 --- a/fs/nfs/flexfilelayout/flexfilelayoutdev.c +++ b/fs/nfs/flexfilelayout/flexfilelayoutdev.c @@ -557,6 +557,12 @@ bool ff_layout_avoid_mds_available_ds(struct pnfs_layout_segment *lseg) ff_layout_has_available_ds(lseg); } +bool ff_layout_avoid_read_on_rw(struct pnfs_layout_segment *lseg) +{ + return lseg->pls_range.iomode == IOMODE_RW && + ff_layout_no_read_on_rw(lseg); +} + module_param(dataserver_retrans, uint, 0644); MODULE_PARM_DESC(dataserver_retrans, "The number of times the NFSv4.1 client " "retries a request before it attempts further " |
