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SUNRPC: Refactor logic to NUL-terminate strings in pages

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Clean up: Introduce a helper to '\0'-terminate XDR strings
that are placed in a page in the page cache.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Chuck Lever
2010-09-21 16:55:48 -04:00
committed by Trond Myklebust
parent 38359352fc
commit b4687da7fc
5 changed files with 21 additions and 14 deletions
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net/sunrpc/xdr.c
+17
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@@ -111,6 +111,23 @@ xdr_decode_string_inplace(__be32 *p, char **sp,
}
EXPORT_SYMBOL_GPL(xdr_decode_string_inplace);
/**
* xdr_terminate_string - '\0'-terminate a string residing in an xdr_buf
* @buf: XDR buffer where string resides
* @len: length of string, in bytes
*
*/
void
xdr_terminate_string(struct xdr_buf *buf, const u32 len)
{
char *kaddr;
kaddr = kmap_atomic(buf->pages[0], KM_USER0);
kaddr[buf->page_base + len] = '\0';
kunmap_atomic(kaddr, KM_USER0);
}
EXPORT_SYMBOL(xdr_terminate_string);
void
xdr_encode_pages(struct xdr_buf *xdr, struct page **pages, unsigned int base,
unsigned int len)