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>
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index ee723aa..2c955c3 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -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 @@ pnfs_update_layout(struct inode *ino,
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);
