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flexfiles: use per-mirror specified stateid for IO

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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>
This commit is contained in:
Tigran Mkrtchyan 2018-11-21 12:25:41 +01:00 committed by Trond Myklebust
parent 99f2c55591
commit bb21ce0ad2
3 changed files with 32 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
fs/nfs/flexfilelayout/flexfilelayout.c
View File

@ -1361,12 +1361,7 @@ static void ff_layout_read_prepare_v4(struct rpc_task *task, void *data)
task))
return;
if (ff_layout_read_prepare_common(task, hdr))
return;
if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
hdr->args.lock_context, FMODE_READ) == -EIO)
rpc_exit(task, -EIO); /* lost lock, terminate I/O */
ff_layout_read_prepare_common(task, hdr);
}
static void ff_layout_read_call_done(struct rpc_task *task, void *data)
@ -1542,12 +1537,7 @@ static void ff_layout_write_prepare_v4(struct rpc_task *task, void *data)
task))
return;
if (ff_layout_write_prepare_common(task, hdr))
return;
if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
hdr->args.lock_context, FMODE_WRITE) == -EIO)
rpc_exit(task, -EIO); /* lost lock, terminate I/O */
ff_layout_write_prepare_common(task, hdr);
}
static void ff_layout_write_call_done(struct rpc_task *task, void *data)
@ -1742,6 +1732,10 @@ ff_layout_read_pagelist(struct nfs_pgio_header *hdr)
fh = nfs4_ff_layout_select_ds_fh(lseg, idx);
if (fh)
hdr->args.fh = fh;
if (!nfs4_ff_layout_select_ds_stateid(lseg, idx, &hdr->args.stateid))
goto out_failed;
/*
* Note that if we ever decide to split across DSes,
* then we may need to handle dense-like offsets.
@ -1804,6 +1798,9 @@ ff_layout_write_pagelist(struct nfs_pgio_header *hdr, int sync)
if (fh)
hdr->args.fh = fh;
if (!nfs4_ff_layout_select_ds_stateid(lseg, idx, &hdr->args.stateid))
goto out_failed;
/*
* Note that if we ever decide to split across DSes,
* then we may need to handle dense-like offsets.

4
fs/nfs/flexfilelayout/flexfilelayout.h
View File

@ -215,6 +215,10 @@ unsigned int ff_layout_fetch_ds_ioerr(struct pnfs_layout_hdr *lo,
unsigned int maxnum);
struct nfs_fh *
nfs4_ff_layout_select_ds_fh(struct pnfs_layout_segment *lseg, u32 mirror_idx);
int
nfs4_ff_layout_select_ds_stateid(struct pnfs_layout_segment *lseg,
u32 mirror_idx,
nfs4_stateid *stateid);
struct nfs4_pnfs_ds *
nfs4_ff_layout_prepare_ds(struct pnfs_layout_segment *lseg, u32 ds_idx,

19
fs/nfs/flexfilelayout/flexfilelayoutdev.c
View File

@ -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