diff options
| -rw-r--r-- | include/linux/sunrpc/xdr.h | 2 | ||||
| -rw-r--r-- | net/sunrpc/auth_gss/gss_krb5_crypto.c | 73 | ||||
| -rw-r--r-- | net/sunrpc/xdr.c | 68 |
3 files changed, 74 insertions, 69 deletions
diff --git a/include/linux/sunrpc/xdr.h b/include/linux/sunrpc/xdr.h index 441b91dbafe5..4d17846cd78a 100644 --- a/include/linux/sunrpc/xdr.h +++ b/include/linux/sunrpc/xdr.h @@ -11,6 +11,7 @@ #include <linux/uio.h> #include <asm/byteorder.h> +#include <linux/scatterlist.h> /* * Buffer adjustment @@ -196,6 +197,7 @@ extern void xdr_init_decode(struct xdr_stream *xdr, struct xdr_buf *buf, __be32 extern __be32 *xdr_inline_decode(struct xdr_stream *xdr, size_t nbytes); extern void xdr_read_pages(struct xdr_stream *xdr, unsigned int len); extern void xdr_enter_page(struct xdr_stream *xdr, unsigned int len); +extern int xdr_process_buf(struct xdr_buf *buf, unsigned int offset, unsigned int len, int (*actor)(struct scatterlist *, void *), void *data); #endif /* __KERNEL__ */ diff --git a/net/sunrpc/auth_gss/gss_krb5_crypto.c b/net/sunrpc/auth_gss/gss_krb5_crypto.c index 4c53896f1b08..10d05ea37213 100644 --- a/net/sunrpc/auth_gss/gss_krb5_crypto.c +++ b/net/sunrpc/auth_gss/gss_krb5_crypto.c @@ -43,6 +43,7 @@ #include <linux/highmem.h> #include <linux/pagemap.h> #include <linux/sunrpc/gss_krb5.h> +#include <linux/sunrpc/xdr.h> #ifdef RPC_DEBUG # define RPCDBG_FACILITY RPCDBG_AUTH @@ -120,72 +121,6 @@ out: EXPORT_SYMBOL(krb5_decrypt); static int -process_xdr_buf(struct xdr_buf *buf, int offset, int len, - int (*actor)(struct scatterlist *, void *), void *data) -{ - int i, page_len, thislen, page_offset, ret = 0; - struct scatterlist sg[1]; - - if (offset >= buf->head[0].iov_len) { - offset -= buf->head[0].iov_len; - } else { - thislen = buf->head[0].iov_len - offset; - if (thislen > len) - thislen = len; - sg_set_buf(sg, buf->head[0].iov_base + offset, thislen); - ret = actor(sg, data); - if (ret) - goto out; - offset = 0; - len -= thislen; - } - if (len == 0) - goto out; - - if (offset >= buf->page_len) { - offset -= buf->page_len; - } else { - page_len = buf->page_len - offset; - if (page_len > len) - page_len = len; - len -= page_len; - page_offset = (offset + buf->page_base) & (PAGE_CACHE_SIZE - 1); - i = (offset + buf->page_base) >> PAGE_CACHE_SHIFT; - thislen = PAGE_CACHE_SIZE - page_offset; - do { - if (thislen > page_len) - thislen = page_len; - sg->page = buf->pages[i]; - sg->offset = page_offset; - sg->length = thislen; - ret = actor(sg, data); - if (ret) - goto out; - page_len -= thislen; - i++; - page_offset = 0; - thislen = PAGE_CACHE_SIZE; - } while (page_len != 0); - offset = 0; - } - if (len == 0) - goto out; - - if (offset < buf->tail[0].iov_len) { - thislen = buf->tail[0].iov_len - offset; - if (thislen > len) - thislen = len; - sg_set_buf(sg, buf->tail[0].iov_base + offset, thislen); - ret = actor(sg, data); - len -= thislen; - } - if (len != 0) - ret = -EINVAL; -out: - return ret; -} - -static int checksummer(struct scatterlist *sg, void *data) { struct hash_desc *desc = data; @@ -225,7 +160,7 @@ make_checksum(s32 cksumtype, char *header, int hdrlen, struct xdr_buf *body, err = crypto_hash_update(&desc, sg, hdrlen); if (err) goto out; - err = process_xdr_buf(body, body_offset, body->len - body_offset, + err = xdr_process_buf(body, body_offset, body->len - body_offset, checksummer, &desc); if (err) goto out; @@ -323,7 +258,7 @@ gss_encrypt_xdr_buf(struct crypto_blkcipher *tfm, struct xdr_buf *buf, desc.fragno = 0; desc.fraglen = 0; - ret = process_xdr_buf(buf, offset, buf->len - offset, encryptor, &desc); + ret = xdr_process_buf(buf, offset, buf->len - offset, encryptor, &desc); return ret; } @@ -389,7 +324,7 @@ gss_decrypt_xdr_buf(struct crypto_blkcipher *tfm, struct xdr_buf *buf, desc.desc.flags = 0; desc.fragno = 0; desc.fraglen = 0; - return process_xdr_buf(buf, offset, buf->len - offset, decryptor, &desc); + return xdr_process_buf(buf, offset, buf->len - offset, decryptor, &desc); } EXPORT_SYMBOL(gss_decrypt_xdr_buf); diff --git a/net/sunrpc/xdr.c b/net/sunrpc/xdr.c index 5a6485946f3c..a0af250ca319 100644 --- a/net/sunrpc/xdr.c +++ b/net/sunrpc/xdr.c @@ -1021,3 +1021,71 @@ xdr_encode_array2(struct xdr_buf *buf, unsigned int base, return xdr_xcode_array2(buf, base, desc, 1); } + +int +xdr_process_buf(struct xdr_buf *buf, unsigned int offset, unsigned int len, + int (*actor)(struct scatterlist *, void *), void *data) +{ + int i, ret = 0; + unsigned page_len, thislen, page_offset; + struct scatterlist sg[1]; + + if (offset >= buf->head[0].iov_len) { + offset -= buf->head[0].iov_len; + } else { + thislen = buf->head[0].iov_len - offset; + if (thislen > len) + thislen = len; + sg_set_buf(sg, buf->head[0].iov_base + offset, thislen); + ret = actor(sg, data); + if (ret) + goto out; + offset = 0; + len -= thislen; + } + if (len == 0) + goto out; + + if (offset >= buf->page_len) { + offset -= buf->page_len; + } else { + page_len = buf->page_len - offset; + if (page_len > len) + page_len = len; + len -= page_len; + page_offset = (offset + buf->page_base) & (PAGE_CACHE_SIZE - 1); + i = (offset + buf->page_base) >> PAGE_CACHE_SHIFT; + thislen = PAGE_CACHE_SIZE - page_offset; + do { + if (thislen > page_len) + thislen = page_len; + sg->page = buf->pages[i]; + sg->offset = page_offset; + sg->length = thislen; + ret = actor(sg, data); + if (ret) + goto out; + page_len -= thislen; + i++; + page_offset = 0; + thislen = PAGE_CACHE_SIZE; + } while (page_len != 0); + offset = 0; + } + if (len == 0) + goto out; + if (offset < buf->tail[0].iov_len) { + thislen = buf->tail[0].iov_len - offset; + if (thislen > len) + thislen = len; + sg_set_buf(sg, buf->tail[0].iov_base + offset, thislen); + ret = actor(sg, data); + len -= thislen; + } + if (len != 0) + ret = -EINVAL; +out: + return ret; +} +EXPORT_SYMBOL(xdr_process_buf); + |
