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NFS/flexfiles: Simplify nfs4_ff_layout_select_ds_fh() 

Pass in a pointer to the mirror rather than having to retrieve it from
the array and then verify the resulting pointer.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Trond Myklebust 2019-02-28 10:34:13 -05:00
parent 76c6690522
commit 749da527b3
3 changed files with 5 additions and 16 deletions
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4
fs/nfs/flexfilelayout/flexfilelayout.c
View File

@ -1795,7 +1795,7 @@ ff_layout_read_pagelist(struct nfs_pgio_header *hdr)
hdr->pgio_done_cb = ff_layout_read_done_cb;
refcount_inc(&ds->ds_clp->cl_count);
hdr->ds_clp = ds->ds_clp;
fh = nfs4_ff_layout_select_ds_fh(lseg, idx);
fh = nfs4_ff_layout_select_ds_fh(mirror);
if (fh)
hdr->args.fh = fh;
@ -1863,7 +1863,7 @@ ff_layout_write_pagelist(struct nfs_pgio_header *hdr, int sync)
refcount_inc(&ds->ds_clp->cl_count);
hdr->ds_clp = ds->ds_clp;
hdr->ds_commit_idx = idx;
fh = nfs4_ff_layout_select_ds_fh(lseg, idx);
fh = nfs4_ff_layout_select_ds_fh(mirror);
if (fh)
hdr->args.fh = fh;

2
fs/nfs/flexfilelayout/flexfilelayout.h
View File

@ -203,7 +203,7 @@ unsigned int ff_layout_fetch_ds_ioerr(struct pnfs_layout_hdr *lo,
struct list_head *head,
unsigned int maxnum);
struct nfs_fh *
nfs4_ff_layout_select_ds_fh(struct pnfs_layout_segment *lseg, u32 mirror_idx);
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,

15
fs/nfs/flexfilelayout/flexfilelayoutdev.c
View File

@ -351,21 +351,10 @@ ff_layout_get_mirror_cred(struct nfs4_ff_layout_mirror *mirror, u32 iomode)
}
struct nfs_fh *
nfs4_ff_layout_select_ds_fh(struct pnfs_layout_segment *lseg, u32 mirror_idx)
nfs4_ff_layout_select_ds_fh(struct nfs4_ff_layout_mirror *mirror)
{
struct nfs4_ff_layout_mirror *mirror = FF_LAYOUT_COMP(lseg, mirror_idx);
struct nfs_fh *fh = NULL;
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;
}
/* FIXME: For now assume there is only 1 version available for the DS */
fh = &mirror->fh_versions[0];
out:
return fh;
return &mirror->fh_versions[0];
}
int