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CIFS: Use invalidate_inode_pages2 instead of invalidate_remote_inode (try #4)

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Use invalidate_inode_pages2 that don't leave pages even if shrink_page_list()
has a temp ref on them. It prevents a data coherency problem when
cifs_invalidate_mapping didn't invalidate pages but the client thinks that a data
from the cache is uptodate according to an oplock level (exclusive or II).

Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <sfrench@us.ibm.com>
This commit is contained in:
Pavel Shilovsky 2011-03-16 01:55:32 +03:00 committed by Steve French
parent fd5707e1b4
commit 257fb1f15d
1 changed files with 8 additions and 2 deletions
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10
fs/cifs/inode.c
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@ -1691,12 +1691,18 @@ cifs_invalidate_mapping(struct inode *inode)
cifs_i->invalid_mapping = false;
/* write back any cached data */
if (inode->i_mapping && inode->i_mapping->nrpages != 0) {
/* write back any cached data */
rc = filemap_write_and_wait(inode->i_mapping);
mapping_set_error(inode->i_mapping, rc);
rc = invalidate_inode_pages2(inode->i_mapping);
if (rc) {
cERROR(1, "%s: could not invalidate inode %p", __func__,
inode);
cifs_i->invalid_mapping = true;
}
}
invalidate_remote_inode(inode);
cifs_fscache_reset_inode_cookie(inode);
}