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[PATCH] ocfs2: Fix oops when racing files truncates with writes into an mmap region 

This patch fixes an oops that is reproduced when one races writes to a mmap-ed
region with another process truncating the file.

Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
This commit is contained in:
Sunil Mushran 2008-07-16 17:22:22 -07:00 committed by Mark Fasheh
parent 539d826409
commit 961cecbee6
1 changed files with 16 additions and 11 deletions
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27
fs/ocfs2/aops.c
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@ -1073,12 +1073,15 @@ static void ocfs2_write_failure(struct inode *inode,
for(i = 0; i < wc->w_num_pages; i++) {
tmppage = wc->w_pages[i];
if (ocfs2_should_order_data(inode))
walk_page_buffers(wc->w_handle, page_buffers(tmppage),
from, to, NULL,
ocfs2_journal_dirty_data);
if (page_has_buffers(tmppage)) {
if (ocfs2_should_order_data(inode))
walk_page_buffers(wc->w_handle,
page_buffers(tmppage),
from, to, NULL,
ocfs2_journal_dirty_data);
block_commit_write(tmppage, from, to);
block_commit_write(tmppage, from, to);
}
}
}
@ -1901,12 +1904,14 @@ int ocfs2_write_end_nolock(struct address_space *mapping,
to = PAGE_CACHE_SIZE;
}
if (ocfs2_should_order_data(inode))
walk_page_buffers(wc->w_handle, page_buffers(tmppage),
from, to, NULL,
ocfs2_journal_dirty_data);
block_commit_write(tmppage, from, to);
if (page_has_buffers(tmppage)) {
if (ocfs2_should_order_data(inode))
walk_page_buffers(wc->w_handle,
page_buffers(tmppage),
from, to, NULL,
ocfs2_journal_dirty_data);
block_commit_write(tmppage, from, to);
}
}
out_write_size: