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OpenCloudOS-Kernel
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NFS: Ensure that nfs_wb_page() calls writepage when necessary. 

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust 2006-12-05 00:35:41 -05:00
parent 1a54533ec8
commit 4d770ccf42
2 changed files with 31 additions and 4 deletions
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34
fs/nfs/write.c
View File

@ -247,7 +247,7 @@ static int wb_priority(struct writeback_control *wbc)
/*
* Write an mmapped page to the server.
*/
int nfs_writepage(struct page *page, struct writeback_control *wbc)
static int nfs_writepage_locked(struct page *page, struct writeback_control *wbc)
{
struct nfs_open_context *ctx;
struct inode *inode = page->mapping->host;
@ -265,7 +265,7 @@ int nfs_writepage(struct page *page, struct writeback_control *wbc)
if (!flushme)
goto out;
/* Ensure we've flushed out the invalid write */
nfs_wb_page_priority(inode, page, wb_priority(wbc));
nfs_wb_page_priority(inode, page, wb_priority(wbc) | FLUSH_STABLE | FLUSH_NOWRITEPAGE);
}
offset = nfs_page_length(page);
@ -283,6 +283,14 @@ int nfs_writepage(struct page *page, struct writeback_control *wbc)
out:
if (!wbc->for_writepages)
nfs_flush_mapping(page->mapping, wbc, wb_priority(wbc));
return err;
}
int nfs_writepage(struct page *page, struct writeback_control *wbc)
{
int err;
err = nfs_writepage_locked(page, wbc);
unlock_page(page);
return err;
}
@ -1435,8 +1443,26 @@ static int nfs_wb_page_priority(struct inode *inode, struct page *page, int how)
{
loff_t range_start = page_offset(page);
loff_t range_end = range_start + (loff_t)(PAGE_CACHE_SIZE - 1);
struct writeback_control wbc = {
.bdi = page->mapping->backing_dev_info,
.sync_mode = WB_SYNC_ALL,
.nr_to_write = LONG_MAX,
.range_start = range_start,
.range_end = range_end,
};
int ret;
return nfs_sync_mapping_range(inode->i_mapping, range_start, range_end, how | FLUSH_STABLE);
BUG_ON(!PageLocked(page));
if (!(how & FLUSH_NOWRITEPAGE) && clear_page_dirty_for_io(page)) {
ret = nfs_writepage_locked(page, &wbc);
if (ret < 0)
goto out;
}
ret = nfs_sync_mapping_wait(page->mapping, &wbc, how);
if (ret >= 0)
return 0;
out:
return ret;
}
/*
@ -1444,7 +1470,7 @@ static int nfs_wb_page_priority(struct inode *inode, struct page *page, int how)
*/
int nfs_wb_page(struct inode *inode, struct page* page)
{
return nfs_wb_page_priority(inode, page, 0);
return nfs_wb_page_priority(inode, page, FLUSH_STABLE);
}
int nfs_set_page_dirty(struct page *page)

1
include/linux/nfs_fs.h
View File

@ -33,6 +33,7 @@
#define FLUSH_HIGHPRI 16 /* high priority memory reclaim flush */
#define FLUSH_NOCOMMIT 32 /* Don't send the NFSv3/v4 COMMIT */
#define FLUSH_INVALIDATE 64 /* Invalidate the page cache */
#define FLUSH_NOWRITEPAGE 128 /* Don't call writepage() */
#ifdef __KERNEL__