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| author |   Tigran Mkrtchyan <tigran.mkrtchyan@desy.de> | 2018-11-21 12:25:41 +0100 |
|---|---|---|
| committer |   Trond Myklebust <trond.myklebust@hammerspace.com> | 2018-11-22 14:04:55 -0500 |
| commit | bb21ce0ad227b69ec0f83279297ee44232105d96 (patch) | |
| tree | 2e90fa3820d7c3e2642fae6f617f131115052fc6 /fs/nfs/flexfilelayout/flexfilelayoutdev.c | |
| parent | NFSv4.2 copy do not allocate memory under the lock (diff) | |
| download | linux-dev-bb21ce0ad227b69ec0f83279297ee44232105d96.tar.xz linux-dev-bb21ce0ad227b69ec0f83279297ee44232105d96.zip | |
flexfiles: use per-mirror specified stateid for IO
rfc8435 says:
For tight coupling, ffds_stateid provides the stateid to be used by
the client to access the file.
However current implementation replaces per-mirror provided stateid with
by open or lock stateid.
Ensure that per-mirror stateid is used by ff_layout_write_prepare_v4 and
nfs4_ff_layout_prepare_ds.
Signed-off-by: Tigran Mkrtchyan <tigran.mkrtchyan@desy.de>
Signed-off-by: Rick Macklem <rmacklem@uoguelph.ca>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Diffstat (limited to '')
| -rw-r--r-- | fs/nfs/flexfilelayout/flexfilelayoutdev.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/fs/nfs/flexfilelayout/flexfilelayoutdev.c b/fs/nfs/flexfilelayout/flexfilelayoutdev.c index 74d8d5352438..d23347389626 100644 --- a/fs/nfs/flexfilelayout/flexfilelayoutdev.c +++ b/fs/nfs/flexfilelayout/flexfilelayoutdev.c @@ -370,6 +370,25 @@ out: return fh; } +int +nfs4_ff_layout_select_ds_stateid(struct pnfs_layout_segment *lseg, + u32 mirror_idx, + nfs4_stateid *stateid) +{ + struct nfs4_ff_layout_mirror *mirror = FF_LAYOUT_COMP(lseg, mirror_idx); + + if (!ff_layout_mirror_valid(lseg, mirror, false)) { + pr_err_ratelimited("NFS: %s: No data server for mirror offset index %d\n", + __func__, mirror_idx); + goto out; + } + + nfs4_stateid_copy(stateid, &mirror->stateid); + return 1; +out: + return 0; +} + /** * nfs4_ff_layout_prepare_ds - prepare a DS connection for an RPC call * @lseg: the layout segment we're operating on |