60b11392f1
Since we don't zero on extend anymore, truncate needs to be fixed up to zero the part of a file between i_size and and end of it's cluster. Otherwise a subsequent extend could expose bad data. This introduced a new helper, which can be used in ocfs2_write(). Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
91 lines
2.8 KiB
C
91 lines
2.8 KiB
C
/* -*- mode: c; c-basic-offset: 8; -*-
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* vim: noexpandtab sw=8 ts=8 sts=0:
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*
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* Copyright (C) 2002, 2004, 2005 Oracle. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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*/
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#ifndef OCFS2_AOPS_H
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#define OCFS2_AOPS_H
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int ocfs2_prepare_write_nolock(struct inode *inode, struct page *page,
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unsigned from, unsigned to);
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handle_t *ocfs2_start_walk_page_trans(struct inode *inode,
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struct page *page,
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unsigned from,
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unsigned to);
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int ocfs2_map_page_blocks(struct page *page, u64 *p_blkno,
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struct inode *inode, unsigned int from,
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unsigned int to, int new);
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int walk_page_buffers( handle_t *handle,
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struct buffer_head *head,
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unsigned from,
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unsigned to,
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int *partial,
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int (*fn)( handle_t *handle,
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struct buffer_head *bh));
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struct ocfs2_write_ctxt;
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typedef int (ocfs2_page_writer)(struct inode *, struct ocfs2_write_ctxt *,
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u64 *, unsigned int *, unsigned int *);
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ssize_t ocfs2_buffered_write_cluster(struct file *file, loff_t pos,
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size_t count, ocfs2_page_writer *actor,
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void *priv);
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struct ocfs2_write_ctxt {
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size_t w_count;
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loff_t w_pos;
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u32 w_cpos;
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unsigned int w_finished_copy;
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/* This is true if page_size > cluster_size */
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unsigned int w_large_pages;
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/* Filler callback and private data */
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ocfs2_page_writer *w_write_data_page;
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void *w_private;
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/* Only valid for the filler callback */
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struct page *w_this_page;
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unsigned int w_this_page_new;
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};
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struct ocfs2_buffered_write_priv {
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char *b_src_buf;
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const struct iovec *b_cur_iov; /* Current iovec */
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size_t b_cur_off; /* Offset in the
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* current iovec */
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};
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int ocfs2_map_and_write_user_data(struct inode *inode,
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struct ocfs2_write_ctxt *wc,
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u64 *p_blkno,
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unsigned int *ret_from,
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unsigned int *ret_to);
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/* all ocfs2_dio_end_io()'s fault */
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#define ocfs2_iocb_is_rw_locked(iocb) \
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test_bit(0, (unsigned long *)&iocb->private)
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#define ocfs2_iocb_set_rw_locked(iocb) \
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set_bit(0, (unsigned long *)&iocb->private)
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#define ocfs2_iocb_clear_rw_locked(iocb) \
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clear_bit(0, (unsigned long *)&iocb->private)
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#endif /* OCFS2_FILE_H */
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