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Diffstat (limited to 'net/sunrpc/xdr.c')
-rw-r--r--net/sunrpc/xdr.c16
1 files changed, 13 insertions, 3 deletions
diff --git a/net/sunrpc/xdr.c b/net/sunrpc/xdr.c
index f86d1baa6302..65b268d39782 100644
--- a/net/sunrpc/xdr.c
+++ b/net/sunrpc/xdr.c
@@ -176,7 +176,7 @@ xdr_inline_pages(struct xdr_buf *xdr, unsigned int offset,
176 xdr->buflen += len; 176 xdr->buflen += len;
177} 177}
178 178
179void 179int
180xdr_partial_copy_from_skb(struct xdr_buf *xdr, unsigned int base, 180xdr_partial_copy_from_skb(struct xdr_buf *xdr, unsigned int base,
181 skb_reader_t *desc, 181 skb_reader_t *desc,
182 skb_read_actor_t copy_actor) 182 skb_read_actor_t copy_actor)
@@ -190,7 +190,7 @@ xdr_partial_copy_from_skb(struct xdr_buf *xdr, unsigned int base,
190 len -= base; 190 len -= base;
191 ret = copy_actor(desc, (char *)xdr->head[0].iov_base + base, len); 191 ret = copy_actor(desc, (char *)xdr->head[0].iov_base + base, len);
192 if (ret != len || !desc->count) 192 if (ret != len || !desc->count)
193 return; 193 return 0;
194 base = 0; 194 base = 0;
195 } else 195 } else
196 base -= len; 196 base -= len;
@@ -210,6 +210,14 @@ xdr_partial_copy_from_skb(struct xdr_buf *xdr, unsigned int base,
210 do { 210 do {
211 char *kaddr; 211 char *kaddr;
212 212
213 /* ACL likes to be lazy in allocating pages - ACLs
214 * are small by default but can get huge. */
215 if (unlikely(*ppage == NULL)) {
216 *ppage = alloc_page(GFP_ATOMIC);
217 if (unlikely(*ppage == NULL))
218 return -ENOMEM;
219 }
220
213 len = PAGE_CACHE_SIZE; 221 len = PAGE_CACHE_SIZE;
214 kaddr = kmap_atomic(*ppage, KM_SKB_SUNRPC_DATA); 222 kaddr = kmap_atomic(*ppage, KM_SKB_SUNRPC_DATA);
215 if (base) { 223 if (base) {
@@ -226,13 +234,15 @@ xdr_partial_copy_from_skb(struct xdr_buf *xdr, unsigned int base,
226 flush_dcache_page(*ppage); 234 flush_dcache_page(*ppage);
227 kunmap_atomic(kaddr, KM_SKB_SUNRPC_DATA); 235 kunmap_atomic(kaddr, KM_SKB_SUNRPC_DATA);
228 if (ret != len || !desc->count) 236 if (ret != len || !desc->count)
229 return; 237 return 0;
230 ppage++; 238 ppage++;
231 } while ((pglen -= len) != 0); 239 } while ((pglen -= len) != 0);
232copy_tail: 240copy_tail:
233 len = xdr->tail[0].iov_len; 241 len = xdr->tail[0].iov_len;
234 if (base < len) 242 if (base < len)
235 copy_actor(desc, (char *)xdr->tail[0].iov_base + base, len - base); 243 copy_actor(desc, (char *)xdr->tail[0].iov_base + base, len - base);
244
245 return 0;
236} 246}
237 247
238 248