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Diffstat (limited to 'fs/nfs/pnfs.c')
-rw-r--r--fs/nfs/pnfs.c39
1 files changed, 39 insertions, 0 deletions
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index 22c2ddbef420..d9ab97269ce6 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -472,6 +472,9 @@ send_layoutget(struct pnfs_layout_hdr *lo,
struct nfs_server *server = NFS_SERVER(ino);
struct nfs4_layoutget *lgp;
struct pnfs_layout_segment *lseg = NULL;
+ struct page **pages = NULL;
+ int i;
+ u32 max_resp_sz, max_pages;
dprintk("--> %s\n", __func__);
@@ -479,6 +482,21 @@ send_layoutget(struct pnfs_layout_hdr *lo,
lgp = kzalloc(sizeof(*lgp), GFP_KERNEL);
if (lgp == NULL)
return NULL;
+
+ /* allocate pages for xdr post processing */
+ max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
+ max_pages = max_resp_sz >> PAGE_SHIFT;
+
+ pages = kzalloc(max_pages * sizeof(struct page *), GFP_KERNEL);
+ if (!pages)
+ goto out_err_free;
+
+ for (i = 0; i < max_pages; i++) {
+ pages[i] = alloc_page(GFP_KERNEL);
+ if (!pages[i])
+ goto out_err_free;
+ }
+
lgp->args.minlength = NFS4_MAX_UINT64;
lgp->args.maxcount = PNFS_LAYOUT_MAXSIZE;
lgp->args.range.iomode = iomode;
@@ -487,6 +505,8 @@ send_layoutget(struct pnfs_layout_hdr *lo,
lgp->args.type = server->pnfs_curr_ld->id;
lgp->args.inode = ino;
lgp->args.ctx = get_nfs_open_context(ctx);
+ lgp->args.layout.pages = pages;
+ lgp->args.layout.pglen = max_pages * PAGE_SIZE;
lgp->lsegpp = &lseg;
/* Synchronously retrieve layout information from server and
@@ -497,7 +517,26 @@ send_layoutget(struct pnfs_layout_hdr *lo,
/* remember that LAYOUTGET failed and suspend trying */
set_bit(lo_fail_bit(iomode), &lo->plh_flags);
}
+
+ /* free xdr pages */
+ for (i = 0; i < max_pages; i++)
+ __free_page(pages[i]);
+ kfree(pages);
+
return lseg;
+
+out_err_free:
+ /* free any allocated xdr pages, lgp as it's not used */
+ if (pages) {
+ for (i = 0; i < max_pages; i++) {
+ if (!pages[i])
+ break;
+ __free_page(pages[i]);
+ }
+ kfree(pages);
+ }
+ kfree(lgp);
+ return NULL;
}
bool pnfs_roc(struct inode *ino)