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pnfs: refactor send_layoutget 

Pull out the alloc/init part for eventual reuse by OPEN.

Signed-off-by: Fred Isaman <fred.isaman@gmail.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Fred Isaman 2016-09-21 05:14:28 -04:00 committed by Trond Myklebust
parent f86c3ac502
commit 587f03deb6
1 changed files with 15 additions and 18 deletions
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33
fs/nfs/pnfs.c
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@ -915,18 +915,12 @@ pnfs_layoutgets_blocked(const struct pnfs_layout_hdr *lo)
test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags);
}
/*
* Get layout from server.
* for now, assume that whole file layouts are requested.
* arg->offset: 0
* arg->length: all ones
*/
static struct pnfs_layout_segment *
send_layoutget(struct pnfs_layout_hdr *lo,
static struct nfs4_layoutget *
pnfs_alloc_init_layoutget_args(struct pnfs_layout_hdr *lo,
struct nfs_open_context *ctx,
nfs4_stateid *stateid,
const struct pnfs_layout_range *range,
long *timeout, gfp_t gfp_flags)
gfp_t gfp_flags)
{
struct inode *ino = lo->plh_inode;
struct nfs_server *server = NFS_SERVER(ino);
@ -935,14 +929,9 @@ send_layoutget(struct pnfs_layout_hdr *lo,
dprintk("--> %s\n", __func__);
/*
* Synchronously retrieve layout information from server and
* store in lseg. If we race with a concurrent seqid morphing
* op, then re-send the LAYOUTGET.
*/
lgp = kzalloc(sizeof(*lgp), gfp_flags);
if (lgp == NULL)
return ERR_PTR(-ENOMEM);
return NULL;
i_size = i_size_read(ino);
@ -963,8 +952,7 @@ send_layoutget(struct pnfs_layout_hdr *lo,
nfs4_stateid_copy(&lgp->args.stateid, stateid);
lgp->gfp_flags = gfp_flags;
lgp->cred = lo->plh_lc_cred;
return nfs4_proc_layoutget(lgp, timeout, gfp_flags);
return lgp;
}
static void pnfs_clear_layoutcommit(struct inode *inode,
@ -1694,6 +1682,7 @@ pnfs_update_layout(struct inode *ino,
struct nfs_client *clp = server->nfs_client;
struct pnfs_layout_hdr *lo = NULL;
struct pnfs_layout_segment *lseg = NULL;
struct nfs4_layoutget *lgp;
nfs4_stateid stateid;
long timeout = 0;
unsigned long giveup = jiffies + (clp->cl_lease_time << 1);
@ -1838,7 +1827,15 @@ lookup_again:
if (arg.length != NFS4_MAX_UINT64)
arg.length = PAGE_ALIGN(arg.length);
lseg = send_layoutget(lo, ctx, &stateid, &arg, &timeout, gfp_flags);
lgp = pnfs_alloc_init_layoutget_args(lo, ctx, &stateid, &arg, gfp_flags);
if (!lgp) {
trace_pnfs_update_layout(ino, pos, count, iomode, lo, NULL,
PNFS_UPDATE_LAYOUT_NOMEM);
atomic_dec(&lo->plh_outstanding);
goto out_put_layout_hdr;
}
lseg = nfs4_proc_layoutget(lgp, &timeout, gfp_flags);
trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg,
PNFS_UPDATE_LAYOUT_SEND_LAYOUTGET);
atomic_dec(&lo->plh_outstanding);