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NFS/flexfile: Simplify nfs4_ff_layout_select_ds_stateid() 

Pass in a pointer to the mirror rather than forcing another
array access.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Trond Myklebust 2019-02-28 10:49:11 -05:00
parent 626d48b12c
commit 4cbc8a571c
3 changed files with 10 additions and 26 deletions
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8
fs/nfs/flexfilelayout/flexfilelayout.c
View File

@ -1799,9 +1799,7 @@ ff_layout_read_pagelist(struct nfs_pgio_header *hdr)
if (fh)
hdr->args.fh = fh;
if (vers == 4 &&
!nfs4_ff_layout_select_ds_stateid(lseg, idx, &hdr->args.stateid))
goto out_failed;
nfs4_ff_layout_select_ds_stateid(mirror, &hdr->args.stateid);
/*
* Note that if we ever decide to split across DSes,
@ -1867,9 +1865,7 @@ ff_layout_write_pagelist(struct nfs_pgio_header *hdr, int sync)
if (fh)
hdr->args.fh = fh;
if (vers == 4 &&
!nfs4_ff_layout_select_ds_stateid(lseg, idx, &hdr->args.stateid))
goto out_failed;
nfs4_ff_layout_select_ds_stateid(mirror, &hdr->args.stateid);
/*
* Note that if we ever decide to split across DSes,

5
fs/nfs/flexfilelayout/flexfilelayout.h
View File

@ -204,9 +204,8 @@ 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 nfs4_ff_layout_mirror *mirror);
int
nfs4_ff_layout_select_ds_stateid(struct pnfs_layout_segment *lseg,
u32 mirror_idx,
void
nfs4_ff_layout_select_ds_stateid(const struct nfs4_ff_layout_mirror *mirror,
nfs4_stateid *stateid);
struct nfs4_pnfs_ds *

17
fs/nfs/flexfilelayout/flexfilelayoutdev.c
View File

@ -357,23 +357,12 @@ nfs4_ff_layout_select_ds_fh(struct nfs4_ff_layout_mirror *mirror)
return &mirror->fh_versions[0];
}
int
nfs4_ff_layout_select_ds_stateid(struct pnfs_layout_segment *lseg,
u32 mirror_idx,
void
nfs4_ff_layout_select_ds_stateid(const struct nfs4_ff_layout_mirror *mirror,
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;
}
if (nfs4_ff_layout_ds_version(mirror) == 4)
nfs4_stateid_copy(stateid, &mirror->stateid);
return 1;
out:
return 0;
}
/**