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[kernel] generic-2.6: add yaffs fs fixes for 2.6.28

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@14085 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
juhosg 2009-01-18 09:59:55 +00:00
parent 677794e146
commit d7add7e5ed
1 changed files with 120 additions and 0 deletions
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120
target/linux/generic-2.6/patches-2.6.28/514-yaffs_2.6.28_fixes.patch Normal file
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@ -0,0 +1,120 @@
--- a/fs/yaffs2/yaffs_fs.c
+++ b/fs/yaffs2/yaffs_fs.c
@@ -207,10 +207,20 @@ static int yaffs_writepage(struct page *
#else
static int yaffs_writepage(struct page *page);
#endif
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,28))
+static int yaffs_write_begin(struct file *f, struct address_space *mapping,
+ loff_t pos, unsigned len, unsigned flags,
+ struct page **pagep, void **fsdata);
+static int yaffs_write_end(struct file *f, struct address_space *mapping,
+ loff_t pos, unsigned len, unsigned copied,
+ struct page *pg, void *fsdata);
+#else
static int yaffs_prepare_write(struct file *f, struct page *pg,
unsigned offset, unsigned to);
static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
unsigned to);
+#endif
static int yaffs_readlink(struct dentry *dentry, char __user * buffer,
int buflen);
@@ -223,8 +233,13 @@ static int yaffs_follow_link(struct dent
static struct address_space_operations yaffs_file_address_operations = {
.readpage = yaffs_readpage,
.writepage = yaffs_writepage,
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,28))
+ .write_begin = yaffs_write_begin,
+ .write_end = yaffs_write_end,
+#else
.prepare_write = yaffs_prepare_write,
.commit_write = yaffs_commit_write,
+#endif
};
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,22))
@@ -687,6 +702,74 @@ static int yaffs_writepage(struct page *
return (nWritten == nBytes) ? 0 : -ENOSPC;
}
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,28))
+static int yaffs_write_begin(struct file *f, struct address_space *mapping,
+ loff_t pos, unsigned len, unsigned flags,
+ struct page **pagep, void **fsdata)
+{
+ struct page *pg;
+ pgoff_t index = pos >> PAGE_CACHE_SHIFT;
+ int ret = 0;
+
+ pg = __grab_cache_page(mapping, index);
+ if (!pg)
+ return -ENOMEM;
+
+ *pagep = pg;
+
+ T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_write_begin\n"));
+ if (!Page_Uptodate(pg)) {
+ ret = yaffs_readpage_nolock(f, pg);
+ if (ret)
+ goto err_unlock;
+ }
+
+ T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_write_begin\n"));
+ return 0;
+
+ err_unlock:
+ unlock_page(pg);
+ page_cache_release(pg);
+ return ret;
+}
+
+static int yaffs_write_end(struct file *f, struct address_space *mapping,
+ loff_t pos, unsigned len, unsigned copied,
+ struct page *pg, void *fsdata)
+{
+ void *addr = page_address(pg) + (pos & (PAGE_CACHE_SIZE - 1));
+ loff_t pos2;
+ int nBytes = copied;
+ int nWritten;
+
+ T(YAFFS_TRACE_OS,
+ (KERN_DEBUG "yaffs_write_end addr %x pos %x nBytes %d\n", (unsigned)addr,
+ (unsigned)pos, nBytes));
+
+ pos2 = pos;
+ nWritten = yaffs_file_write(f, addr, nBytes, &pos2);
+
+ if (nWritten != nBytes) {
+ T(YAFFS_TRACE_OS,
+ (KERN_DEBUG
+ "yaffs_write_end not same size nWritten %d nBytes %d\n",
+ nWritten, nBytes));
+ SetPageError(pg);
+ ClearPageUptodate(pg);
+ } else {
+ SetPageUptodate(pg);
+ }
+
+ T(YAFFS_TRACE_OS,
+ (KERN_DEBUG "yaffs_write_end returning %d\n",
+ nWritten == nBytes ? nWritten : 0));
+
+ unlock_page(pg);
+ page_cache_release(pg);
+
+ return (nWritten == nBytes) ? nWritten : 0;
+}
+#else
static int yaffs_prepare_write(struct file *f, struct page *pg,
unsigned offset, unsigned to)
{
@@ -735,6 +818,7 @@ static int yaffs_commit_write(struct fil
return nWritten == nBytes ? 0 : nWritten;
}
+#endif /* (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,28)) */
static void yaffs_FillInodeFromObject(struct inode *inode, yaffs_Object * obj)
{