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authorDavid S. Miller <davem@davemloft.net>2012-09-15 19:43:53 +0400
committerDavid S. Miller <davem@davemloft.net>2012-09-15 19:43:53 +0400
commitb48b63a1f6e26b0dec2c9f1690396ed4bcb66903 (patch)
tree8d9ad227c3a7d35cd78d40ecaf9bf59375dbd21a /fs/udf/file.c
parent7f2e6a5d8608d0353b017a0fe15502307593734e (diff)
parent3f0c3c8fe30c725c1264fb6db8cc4b69db3a658a (diff)
downloadlinux-b48b63a1f6e26b0dec2c9f1690396ed4bcb66903.tar.xz
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts: net/netfilter/nfnetlink_log.c net/netfilter/xt_LOG.c Rather easy conflict resolution, the 'net' tree had bug fixes to make sure we checked if a socket is a time-wait one or not and elide the logging code if so. Whereas on the 'net-next' side we are calculating the UID and GID from the creds using different interfaces due to the user namespace changes from Eric Biederman. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'fs/udf/file.c')
-rw-r--r--fs/udf/file.c35
1 files changed, 29 insertions, 6 deletions
diff --git a/fs/udf/file.c b/fs/udf/file.c
index 7f3f7ba3df6e..d1c6093fd3d3 100644
--- a/fs/udf/file.c
+++ b/fs/udf/file.c
@@ -39,20 +39,24 @@
#include "udf_i.h"
#include "udf_sb.h"
-static int udf_adinicb_readpage(struct file *file, struct page *page)
+static void __udf_adinicb_readpage(struct page *page)
{
struct inode *inode = page->mapping->host;
char *kaddr;
struct udf_inode_info *iinfo = UDF_I(inode);
- BUG_ON(!PageLocked(page));
-
kaddr = kmap(page);
- memset(kaddr, 0, PAGE_CACHE_SIZE);
memcpy(kaddr, iinfo->i_ext.i_data + iinfo->i_lenEAttr, inode->i_size);
+ memset(kaddr + inode->i_size, 0, PAGE_CACHE_SIZE - inode->i_size);
flush_dcache_page(page);
SetPageUptodate(page);
kunmap(page);
+}
+
+static int udf_adinicb_readpage(struct file *file, struct page *page)
+{
+ BUG_ON(!PageLocked(page));
+ __udf_adinicb_readpage(page);
unlock_page(page);
return 0;
@@ -77,6 +81,25 @@ static int udf_adinicb_writepage(struct page *page,
return 0;
}
+static int udf_adinicb_write_begin(struct file *file,
+ struct address_space *mapping, loff_t pos,
+ unsigned len, unsigned flags, struct page **pagep,
+ void **fsdata)
+{
+ struct page *page;
+
+ if (WARN_ON_ONCE(pos >= PAGE_CACHE_SIZE))
+ return -EIO;
+ page = grab_cache_page_write_begin(mapping, 0, flags);
+ if (!page)
+ return -ENOMEM;
+ *pagep = page;
+
+ if (!PageUptodate(page) && len != PAGE_CACHE_SIZE)
+ __udf_adinicb_readpage(page);
+ return 0;
+}
+
static int udf_adinicb_write_end(struct file *file,
struct address_space *mapping,
loff_t pos, unsigned len, unsigned copied,
@@ -98,8 +121,8 @@ static int udf_adinicb_write_end(struct file *file,
const struct address_space_operations udf_adinicb_aops = {
.readpage = udf_adinicb_readpage,
.writepage = udf_adinicb_writepage,
- .write_begin = simple_write_begin,
- .write_end = udf_adinicb_write_end,
+ .write_begin = udf_adinicb_write_begin,
+ .write_end = udf_adinicb_write_end,
};
static ssize_t udf_file_aio_write(struct kiocb *iocb, const struct iovec *iov,