move_extent.c (b7446e7cf15f0926866c8e5de90ab278998bf8c8) move_extent.c (fe5ddf6b21c7b9b2c6e29ef6fd38d827ced55e6e)
1// SPDX-License-Identifier: LGPL-2.1
2/*
3 * Copyright (c) 2008,2009 NEC Software Tohoku, Ltd.
4 * Written by Takashi Sato <t-sato@yk.jp.nec.com>
5 * Akira Fujita <a-fujita@rs.jp.nec.com>
6 */
7
8#include <linux/fs.h>

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664 donor_inode->i_blkbits);
665 offset_in_page = o_start % blocks_per_page;
666 if (cur_len > blocks_per_page- offset_in_page)
667 cur_len = blocks_per_page - offset_in_page;
668 /*
669 * Up semaphore to avoid following problems:
670 * a. transaction deadlock among ext4_journal_start,
671 * ->write_begin via pagefault, and jbd2_journal_commit
1// SPDX-License-Identifier: LGPL-2.1
2/*
3 * Copyright (c) 2008,2009 NEC Software Tohoku, Ltd.
4 * Written by Takashi Sato <t-sato@yk.jp.nec.com>
5 * Akira Fujita <a-fujita@rs.jp.nec.com>
6 */
7
8#include <linux/fs.h>

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664 donor_inode->i_blkbits);
665 offset_in_page = o_start % blocks_per_page;
666 if (cur_len > blocks_per_page- offset_in_page)
667 cur_len = blocks_per_page - offset_in_page;
668 /*
669 * Up semaphore to avoid following problems:
670 * a. transaction deadlock among ext4_journal_start,
671 * ->write_begin via pagefault, and jbd2_journal_commit
672 * b. racing with ->readpage, ->write_begin, and ext4_get_block
673 * in move_extent_per_page
672 * b. racing with ->read_folio, ->write_begin, and
673 * ext4_get_block in move_extent_per_page
674 */
675 ext4_double_up_write_data_sem(orig_inode, donor_inode);
676 /* Swap original branches with new branches */
677 move_extent_per_page(o_filp, donor_inode,
678 orig_page_index, donor_page_index,
679 offset_in_page, cur_len,
680 unwritten, &ret);
681 ext4_double_down_write_data_sem(orig_inode, donor_inode);

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675 ext4_double_up_write_data_sem(orig_inode, donor_inode);
676 /* Swap original branches with new branches */
677 move_extent_per_page(o_filp, donor_inode,
678 orig_page_index, donor_page_index,
679 offset_in_page, cur_len,
680 unwritten, &ret);
681 ext4_double_down_write_data_sem(orig_inode, donor_inode);

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