nilfs2: inode operations
This adds inode level operations of the nilfs2 file system. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
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819
fs/nilfs2/inode.c
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819
fs/nilfs2/inode.c
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/*
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* inode.c - NILFS inode operations.
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*
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* Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (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
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* GNU 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 License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* Written by Ryusuke Konishi <ryusuke@osrg.net>
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*
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*/
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#include <linux/buffer_head.h>
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#include <linux/mpage.h>
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#include <linux/writeback.h>
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#include "nilfs.h"
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#include "segment.h"
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#include "page.h"
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#include "mdt.h"
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#include "cpfile.h"
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#include "ifile.h"
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/**
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* nilfs_get_block() - get a file block on the filesystem (callback function)
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* @inode - inode struct of the target file
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* @blkoff - file block number
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* @bh_result - buffer head to be mapped on
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* @create - indicate whether allocating the block or not when it has not
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* been allocated yet.
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*
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* This function does not issue actual read request of the specified data
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* block. It is done by VFS.
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* Bulk read for direct-io is not supported yet. (should be supported)
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*/
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int nilfs_get_block(struct inode *inode, sector_t blkoff,
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struct buffer_head *bh_result, int create)
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{
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struct nilfs_inode_info *ii = NILFS_I(inode);
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unsigned long blknum = 0;
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int err = 0, ret;
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struct inode *dat = nilfs_dat_inode(NILFS_I_NILFS(inode));
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/* This exclusion control is a workaround; should be revised */
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down_read(&NILFS_MDT(dat)->mi_sem); /* XXX */
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ret = nilfs_bmap_lookup(ii->i_bmap, (unsigned long)blkoff, &blknum);
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up_read(&NILFS_MDT(dat)->mi_sem); /* XXX */
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if (ret == 0) { /* found */
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map_bh(bh_result, inode->i_sb, blknum);
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goto out;
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}
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if (unlikely(ret == 1)) {
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printk(KERN_ERR "nilfs_get_block: bmap_lookup returns "
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"buffer_head pointer (blkoff=%llu, blknum=%lu)\n",
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(unsigned long long)blkoff, blknum);
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BUG();
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}
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/* data block was not found */
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if (ret == -ENOENT && create) {
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struct nilfs_transaction_info ti;
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bh_result->b_blocknr = 0;
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err = nilfs_transaction_begin(inode->i_sb, &ti, 1);
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if (unlikely(err))
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goto out;
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err = nilfs_bmap_insert(ii->i_bmap, (unsigned long)blkoff,
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(unsigned long)bh_result);
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nilfs_transaction_end(inode->i_sb, !err);
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if (unlikely(err != 0)) {
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if (err == -EEXIST) {
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/*
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* The get_block() function could be called
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* from multiple callers for an inode.
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* However, the page having this block must
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* be locked in this case.
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*/
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printk(KERN_ERR
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"nilfs_get_block: a race condition "
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"while inserting a data block. "
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"(inode number=%lu, file block "
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"offset=%llu)\n",
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inode->i_ino,
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(unsigned long long)blkoff);
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BUG();
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} else if (err == -EINVAL) {
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nilfs_error(inode->i_sb, __func__,
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"broken bmap (inode=%lu)\n",
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inode->i_ino);
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err = -EIO;
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}
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goto out;
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}
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/* Error handling should be detailed */
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set_buffer_new(bh_result);
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map_bh(bh_result, inode->i_sb, 0); /* dbn must be changed
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to proper value */
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} else if (ret == -ENOENT) {
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/* not found is not error (e.g. hole); must return without
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the mapped state flag. */
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;
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} else {
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err = ret;
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}
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out:
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return err;
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}
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/**
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* nilfs_readpage() - implement readpage() method of nilfs_aops {}
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* address_space_operations.
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* @file - file struct of the file to be read
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* @page - the page to be read
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*/
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static int nilfs_readpage(struct file *file, struct page *page)
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{
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return mpage_readpage(page, nilfs_get_block);
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}
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/**
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* nilfs_readpages() - implement readpages() method of nilfs_aops {}
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* address_space_operations.
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* @file - file struct of the file to be read
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* @mapping - address_space struct used for reading multiple pages
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* @pages - the pages to be read
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* @nr_pages - number of pages to be read
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*/
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static int nilfs_readpages(struct file *file, struct address_space *mapping,
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struct list_head *pages, unsigned nr_pages)
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{
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return mpage_readpages(mapping, pages, nr_pages, nilfs_get_block);
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}
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static int nilfs_writepages(struct address_space *mapping,
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struct writeback_control *wbc)
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{
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/* This empty method is required not to call generic_writepages() */
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return 0;
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}
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static int nilfs_writepage(struct page *page, struct writeback_control *wbc)
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{
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struct inode *inode = page->mapping->host;
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int err;
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redirty_page_for_writepage(wbc, page);
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unlock_page(page);
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if (wbc->sync_mode == WB_SYNC_ALL) {
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err = nilfs_construct_segment(inode->i_sb);
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if (unlikely(err))
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return err;
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} else if (wbc->for_reclaim)
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nilfs_flush_segment(inode->i_sb, inode->i_ino);
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return 0;
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}
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static int nilfs_set_page_dirty(struct page *page)
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{
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int ret = __set_page_dirty_buffers(page);
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if (ret) {
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struct inode *inode = page->mapping->host;
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struct nilfs_sb_info *sbi = NILFS_SB(inode->i_sb);
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unsigned nr_dirty = 1 << (PAGE_SHIFT - inode->i_blkbits);
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nilfs_set_file_dirty(sbi, inode, nr_dirty);
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}
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return ret;
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}
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static int nilfs_write_begin(struct file *file, struct address_space *mapping,
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loff_t pos, unsigned len, unsigned flags,
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struct page **pagep, void **fsdata)
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{
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struct inode *inode = mapping->host;
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int err = nilfs_transaction_begin(inode->i_sb, NULL, 1);
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if (unlikely(err))
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return err;
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*pagep = NULL;
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err = block_write_begin(file, mapping, pos, len, flags, pagep,
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fsdata, nilfs_get_block);
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if (unlikely(err))
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nilfs_transaction_end(inode->i_sb, 0);
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return err;
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}
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static int nilfs_write_end(struct file *file, struct address_space *mapping,
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loff_t pos, unsigned len, unsigned copied,
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struct page *page, void *fsdata)
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{
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struct inode *inode = mapping->host;
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unsigned start = pos & (PAGE_CACHE_SIZE - 1);
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unsigned nr_dirty;
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int err;
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nr_dirty = nilfs_page_count_clean_buffers(page, start,
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start + copied);
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copied = generic_write_end(file, mapping, pos, len, copied, page,
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fsdata);
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nilfs_set_file_dirty(NILFS_SB(inode->i_sb), inode, nr_dirty);
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err = nilfs_transaction_end(inode->i_sb, 1);
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return err ? : copied;
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}
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static ssize_t
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nilfs_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov,
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loff_t offset, unsigned long nr_segs)
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{
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struct file *file = iocb->ki_filp;
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struct inode *inode = file->f_mapping->host;
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ssize_t size;
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int err;
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err = nilfs_construct_dsync_segment(inode->i_sb, inode);
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if (unlikely(err))
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return err;
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if (rw == WRITE)
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return 0;
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/* Needs synchronization with the cleaner */
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size = blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
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offset, nr_segs, nilfs_get_block, NULL);
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return size;
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}
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struct address_space_operations nilfs_aops = {
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.writepage = nilfs_writepage,
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.readpage = nilfs_readpage,
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/* .sync_page = nilfs_sync_page, */
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.writepages = nilfs_writepages,
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.set_page_dirty = nilfs_set_page_dirty,
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.readpages = nilfs_readpages,
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.write_begin = nilfs_write_begin,
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.write_end = nilfs_write_end,
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/* .releasepage = nilfs_releasepage, */
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.invalidatepage = block_invalidatepage,
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.direct_IO = nilfs_direct_IO,
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};
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struct inode *nilfs_new_inode(struct inode *dir, int mode)
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{
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struct super_block *sb = dir->i_sb;
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struct nilfs_sb_info *sbi = NILFS_SB(sb);
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struct inode *inode;
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struct nilfs_inode_info *ii;
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int err = -ENOMEM;
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ino_t ino;
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inode = new_inode(sb);
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if (unlikely(!inode))
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goto failed;
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mapping_set_gfp_mask(inode->i_mapping,
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mapping_gfp_mask(inode->i_mapping) & ~__GFP_FS);
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ii = NILFS_I(inode);
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ii->i_state = 1 << NILFS_I_NEW;
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err = nilfs_ifile_create_inode(sbi->s_ifile, &ino, &ii->i_bh);
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if (unlikely(err))
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goto failed_ifile_create_inode;
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/* reference count of i_bh inherits from nilfs_mdt_read_block() */
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atomic_inc(&sbi->s_inodes_count);
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inode->i_uid = current_fsuid();
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if (dir->i_mode & S_ISGID) {
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inode->i_gid = dir->i_gid;
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if (S_ISDIR(mode))
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mode |= S_ISGID;
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} else
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inode->i_gid = current_fsgid();
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inode->i_mode = mode;
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inode->i_ino = ino;
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inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
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if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) {
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err = nilfs_bmap_read(ii->i_bmap, NULL);
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if (err < 0)
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goto failed_bmap;
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set_bit(NILFS_I_BMAP, &ii->i_state);
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/* No lock is needed; iget() ensures it. */
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}
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ii->i_flags = NILFS_I(dir)->i_flags;
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if (S_ISLNK(mode))
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ii->i_flags &= ~(NILFS_IMMUTABLE_FL | NILFS_APPEND_FL);
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if (!S_ISDIR(mode))
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ii->i_flags &= ~NILFS_DIRSYNC_FL;
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/* ii->i_file_acl = 0; */
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/* ii->i_dir_acl = 0; */
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ii->i_dtime = 0;
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ii->i_dir_start_lookup = 0;
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#ifdef CONFIG_NILFS_FS_POSIX_ACL
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ii->i_acl = NULL;
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ii->i_default_acl = NULL;
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#endif
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ii->i_cno = 0;
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nilfs_set_inode_flags(inode);
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spin_lock(&sbi->s_next_gen_lock);
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inode->i_generation = sbi->s_next_generation++;
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spin_unlock(&sbi->s_next_gen_lock);
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insert_inode_hash(inode);
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err = nilfs_init_acl(inode, dir);
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if (unlikely(err))
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goto failed_acl; /* never occur. When supporting
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nilfs_init_acl(), proper cancellation of
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above jobs should be considered */
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mark_inode_dirty(inode);
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return inode;
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failed_acl:
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failed_bmap:
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inode->i_nlink = 0;
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iput(inode); /* raw_inode will be deleted through
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generic_delete_inode() */
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goto failed;
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failed_ifile_create_inode:
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make_bad_inode(inode);
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iput(inode); /* if i_nlink == 1, generic_forget_inode() will be
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called */
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failed:
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return ERR_PTR(err);
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}
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void nilfs_free_inode(struct inode *inode)
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{
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struct super_block *sb = inode->i_sb;
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struct nilfs_sb_info *sbi = NILFS_SB(sb);
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clear_inode(inode);
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/* XXX: check error code? Is there any thing I can do? */
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(void) nilfs_ifile_delete_inode(sbi->s_ifile, inode->i_ino);
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atomic_dec(&sbi->s_inodes_count);
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}
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void nilfs_set_inode_flags(struct inode *inode)
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{
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unsigned int flags = NILFS_I(inode)->i_flags;
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inode->i_flags &= ~(S_SYNC | S_APPEND | S_IMMUTABLE | S_NOATIME |
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S_DIRSYNC);
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if (flags & NILFS_SYNC_FL)
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inode->i_flags |= S_SYNC;
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if (flags & NILFS_APPEND_FL)
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inode->i_flags |= S_APPEND;
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if (flags & NILFS_IMMUTABLE_FL)
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inode->i_flags |= S_IMMUTABLE;
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#ifndef NILFS_ATIME_DISABLE
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if (flags & NILFS_NOATIME_FL)
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#endif
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inode->i_flags |= S_NOATIME;
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if (flags & NILFS_DIRSYNC_FL)
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inode->i_flags |= S_DIRSYNC;
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mapping_set_gfp_mask(inode->i_mapping,
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mapping_gfp_mask(inode->i_mapping) & ~__GFP_FS);
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}
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int nilfs_read_inode_common(struct inode *inode,
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struct nilfs_inode *raw_inode)
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{
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struct nilfs_inode_info *ii = NILFS_I(inode);
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int err;
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inode->i_mode = le16_to_cpu(raw_inode->i_mode);
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inode->i_uid = (uid_t)le32_to_cpu(raw_inode->i_uid);
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inode->i_gid = (gid_t)le32_to_cpu(raw_inode->i_gid);
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inode->i_nlink = le16_to_cpu(raw_inode->i_links_count);
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inode->i_size = le64_to_cpu(raw_inode->i_size);
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inode->i_atime.tv_sec = le64_to_cpu(raw_inode->i_mtime);
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inode->i_ctime.tv_sec = le64_to_cpu(raw_inode->i_ctime);
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inode->i_mtime.tv_sec = le64_to_cpu(raw_inode->i_mtime);
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inode->i_atime.tv_nsec = 0;
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inode->i_ctime.tv_nsec = 0;
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inode->i_mtime.tv_nsec = 0;
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ii->i_dtime = le64_to_cpu(raw_inode->i_dtime);
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if (inode->i_nlink == 0 && (inode->i_mode == 0 || ii->i_dtime))
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return -EINVAL; /* this inode is deleted */
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inode->i_blocks = le64_to_cpu(raw_inode->i_blocks);
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ii->i_flags = le32_to_cpu(raw_inode->i_flags);
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#if 0
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ii->i_file_acl = le32_to_cpu(raw_inode->i_file_acl);
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ii->i_dir_acl = S_ISREG(inode->i_mode) ?
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0 : le32_to_cpu(raw_inode->i_dir_acl);
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#endif
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ii->i_cno = 0;
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inode->i_generation = le32_to_cpu(raw_inode->i_generation);
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if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
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S_ISLNK(inode->i_mode)) {
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err = nilfs_bmap_read(ii->i_bmap, raw_inode);
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if (err < 0)
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return err;
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set_bit(NILFS_I_BMAP, &ii->i_state);
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/* No lock is needed; iget() ensures it. */
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}
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return 0;
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}
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static int nilfs_read_sketch_inode(struct inode *inode)
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{
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struct nilfs_sb_info *sbi = NILFS_SB(inode->i_sb);
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int err = 0;
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if (sbi->s_snapshot_cno) {
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struct the_nilfs *nilfs = sbi->s_nilfs;
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struct buffer_head *bh_cp;
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struct nilfs_checkpoint *raw_cp;
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err = nilfs_cpfile_get_checkpoint(
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nilfs->ns_cpfile, sbi->s_snapshot_cno, 0, &raw_cp,
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&bh_cp);
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if (likely(!err)) {
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if (!nilfs_checkpoint_sketch(raw_cp))
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inode->i_size = 0;
|
||||
nilfs_cpfile_put_checkpoint(
|
||||
nilfs->ns_cpfile, sbi->s_snapshot_cno, bh_cp);
|
||||
}
|
||||
inode->i_flags |= S_NOCMTIME;
|
||||
}
|
||||
return err;
|
||||
}
|
||||
|
||||
static int __nilfs_read_inode(struct super_block *sb, unsigned long ino,
|
||||
struct inode *inode)
|
||||
{
|
||||
struct nilfs_sb_info *sbi = NILFS_SB(sb);
|
||||
struct inode *dat = nilfs_dat_inode(sbi->s_nilfs);
|
||||
struct buffer_head *bh;
|
||||
struct nilfs_inode *raw_inode;
|
||||
int err;
|
||||
|
||||
down_read(&NILFS_MDT(dat)->mi_sem); /* XXX */
|
||||
err = nilfs_ifile_get_inode_block(sbi->s_ifile, ino, &bh);
|
||||
if (unlikely(err))
|
||||
goto bad_inode;
|
||||
|
||||
raw_inode = nilfs_ifile_map_inode(sbi->s_ifile, ino, bh);
|
||||
|
||||
#ifdef CONFIG_NILFS_FS_POSIX_ACL
|
||||
ii->i_acl = NILFS_ACL_NOT_CACHED;
|
||||
ii->i_default_acl = NILFS_ACL_NOT_CACHED;
|
||||
#endif
|
||||
if (nilfs_read_inode_common(inode, raw_inode))
|
||||
goto failed_unmap;
|
||||
|
||||
if (S_ISREG(inode->i_mode)) {
|
||||
inode->i_op = &nilfs_file_inode_operations;
|
||||
inode->i_fop = &nilfs_file_operations;
|
||||
inode->i_mapping->a_ops = &nilfs_aops;
|
||||
if (unlikely(inode->i_ino == NILFS_SKETCH_INO)) {
|
||||
err = nilfs_read_sketch_inode(inode);
|
||||
if (unlikely(err))
|
||||
goto failed_unmap;
|
||||
}
|
||||
} else if (S_ISDIR(inode->i_mode)) {
|
||||
inode->i_op = &nilfs_dir_inode_operations;
|
||||
inode->i_fop = &nilfs_dir_operations;
|
||||
inode->i_mapping->a_ops = &nilfs_aops;
|
||||
} else if (S_ISLNK(inode->i_mode)) {
|
||||
inode->i_op = &nilfs_symlink_inode_operations;
|
||||
inode->i_mapping->a_ops = &nilfs_aops;
|
||||
} else {
|
||||
inode->i_op = &nilfs_special_inode_operations;
|
||||
init_special_inode(
|
||||
inode, inode->i_mode,
|
||||
new_decode_dev(le64_to_cpu(raw_inode->i_device_code)));
|
||||
}
|
||||
nilfs_ifile_unmap_inode(sbi->s_ifile, ino, bh);
|
||||
brelse(bh);
|
||||
up_read(&NILFS_MDT(dat)->mi_sem); /* XXX */
|
||||
nilfs_set_inode_flags(inode);
|
||||
return 0;
|
||||
|
||||
failed_unmap:
|
||||
nilfs_ifile_unmap_inode(sbi->s_ifile, ino, bh);
|
||||
brelse(bh);
|
||||
|
||||
bad_inode:
|
||||
up_read(&NILFS_MDT(dat)->mi_sem); /* XXX */
|
||||
return err;
|
||||
}
|
||||
|
||||
struct inode *nilfs_iget(struct super_block *sb, unsigned long ino)
|
||||
{
|
||||
struct inode *inode;
|
||||
int err;
|
||||
|
||||
inode = iget_locked(sb, ino);
|
||||
if (unlikely(!inode))
|
||||
return ERR_PTR(-ENOMEM);
|
||||
if (!(inode->i_state & I_NEW))
|
||||
return inode;
|
||||
|
||||
err = __nilfs_read_inode(sb, ino, inode);
|
||||
if (unlikely(err)) {
|
||||
iget_failed(inode);
|
||||
return ERR_PTR(err);
|
||||
}
|
||||
unlock_new_inode(inode);
|
||||
return inode;
|
||||
}
|
||||
|
||||
void nilfs_write_inode_common(struct inode *inode,
|
||||
struct nilfs_inode *raw_inode, int has_bmap)
|
||||
{
|
||||
struct nilfs_inode_info *ii = NILFS_I(inode);
|
||||
|
||||
raw_inode->i_mode = cpu_to_le16(inode->i_mode);
|
||||
raw_inode->i_uid = cpu_to_le32(inode->i_uid);
|
||||
raw_inode->i_gid = cpu_to_le32(inode->i_gid);
|
||||
raw_inode->i_links_count = cpu_to_le16(inode->i_nlink);
|
||||
raw_inode->i_size = cpu_to_le64(inode->i_size);
|
||||
raw_inode->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
|
||||
raw_inode->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec);
|
||||
raw_inode->i_blocks = cpu_to_le64(inode->i_blocks);
|
||||
|
||||
raw_inode->i_dtime = cpu_to_le64(ii->i_dtime);
|
||||
raw_inode->i_flags = cpu_to_le32(ii->i_flags);
|
||||
raw_inode->i_generation = cpu_to_le32(inode->i_generation);
|
||||
|
||||
if (has_bmap)
|
||||
nilfs_bmap_write(ii->i_bmap, raw_inode);
|
||||
else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
|
||||
raw_inode->i_device_code =
|
||||
cpu_to_le64(new_encode_dev(inode->i_rdev));
|
||||
/* When extending inode, nilfs->ns_inode_size should be checked
|
||||
for substitutions of appended fields */
|
||||
}
|
||||
|
||||
void nilfs_update_inode(struct inode *inode, struct buffer_head *ibh)
|
||||
{
|
||||
ino_t ino = inode->i_ino;
|
||||
struct nilfs_inode_info *ii = NILFS_I(inode);
|
||||
struct super_block *sb = inode->i_sb;
|
||||
struct nilfs_sb_info *sbi = NILFS_SB(sb);
|
||||
struct nilfs_inode *raw_inode;
|
||||
|
||||
raw_inode = nilfs_ifile_map_inode(sbi->s_ifile, ino, ibh);
|
||||
|
||||
/* The buffer is guarded with lock_buffer() by the caller */
|
||||
if (test_and_clear_bit(NILFS_I_NEW, &ii->i_state))
|
||||
memset(raw_inode, 0, NILFS_MDT(sbi->s_ifile)->mi_entry_size);
|
||||
set_bit(NILFS_I_INODE_DIRTY, &ii->i_state);
|
||||
|
||||
nilfs_write_inode_common(inode, raw_inode, 0);
|
||||
/* XXX: call with has_bmap = 0 is a workaround to avoid
|
||||
deadlock of bmap. This delays update of i_bmap to just
|
||||
before writing */
|
||||
nilfs_ifile_unmap_inode(sbi->s_ifile, ino, ibh);
|
||||
}
|
||||
|
||||
#define NILFS_MAX_TRUNCATE_BLOCKS 16384 /* 64MB for 4KB block */
|
||||
|
||||
static void nilfs_truncate_bmap(struct nilfs_inode_info *ii,
|
||||
unsigned long from)
|
||||
{
|
||||
unsigned long b;
|
||||
int ret;
|
||||
|
||||
if (!test_bit(NILFS_I_BMAP, &ii->i_state))
|
||||
return;
|
||||
repeat:
|
||||
ret = nilfs_bmap_last_key(ii->i_bmap, &b);
|
||||
if (ret == -ENOENT)
|
||||
return;
|
||||
else if (ret < 0)
|
||||
goto failed;
|
||||
|
||||
if (b < from)
|
||||
return;
|
||||
|
||||
b -= min_t(unsigned long, NILFS_MAX_TRUNCATE_BLOCKS, b - from);
|
||||
ret = nilfs_bmap_truncate(ii->i_bmap, b);
|
||||
nilfs_relax_pressure_in_lock(ii->vfs_inode.i_sb);
|
||||
if (!ret || (ret == -ENOMEM &&
|
||||
nilfs_bmap_truncate(ii->i_bmap, b) == 0))
|
||||
goto repeat;
|
||||
|
||||
failed:
|
||||
if (ret == -EINVAL)
|
||||
nilfs_error(ii->vfs_inode.i_sb, __func__,
|
||||
"bmap is broken (ino=%lu)", ii->vfs_inode.i_ino);
|
||||
else
|
||||
nilfs_warning(ii->vfs_inode.i_sb, __func__,
|
||||
"failed to truncate bmap (ino=%lu, err=%d)",
|
||||
ii->vfs_inode.i_ino, ret);
|
||||
}
|
||||
|
||||
void nilfs_truncate(struct inode *inode)
|
||||
{
|
||||
unsigned long blkoff;
|
||||
unsigned int blocksize;
|
||||
struct nilfs_transaction_info ti;
|
||||
struct super_block *sb = inode->i_sb;
|
||||
struct nilfs_inode_info *ii = NILFS_I(inode);
|
||||
int ret;
|
||||
|
||||
if (!test_bit(NILFS_I_BMAP, &ii->i_state))
|
||||
return;
|
||||
if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
|
||||
return;
|
||||
|
||||
blocksize = sb->s_blocksize;
|
||||
blkoff = (inode->i_size + blocksize - 1) >> sb->s_blocksize_bits;
|
||||
ret = nilfs_transaction_begin(sb, &ti, 0);
|
||||
BUG_ON(ret);
|
||||
|
||||
block_truncate_page(inode->i_mapping, inode->i_size, nilfs_get_block);
|
||||
|
||||
nilfs_truncate_bmap(ii, blkoff);
|
||||
|
||||
inode->i_mtime = inode->i_ctime = CURRENT_TIME;
|
||||
if (IS_SYNC(inode))
|
||||
nilfs_set_transaction_flag(NILFS_TI_SYNC);
|
||||
|
||||
nilfs_set_file_dirty(NILFS_SB(sb), inode, 0);
|
||||
nilfs_transaction_end(sb, 1);
|
||||
/* May construct a logical segment and may fail in sync mode.
|
||||
But truncate has no return value. */
|
||||
}
|
||||
|
||||
void nilfs_delete_inode(struct inode *inode)
|
||||
{
|
||||
struct nilfs_transaction_info ti;
|
||||
struct super_block *sb = inode->i_sb;
|
||||
struct nilfs_inode_info *ii = NILFS_I(inode);
|
||||
int err;
|
||||
|
||||
if (unlikely(is_bad_inode(inode))) {
|
||||
if (inode->i_data.nrpages)
|
||||
truncate_inode_pages(&inode->i_data, 0);
|
||||
clear_inode(inode);
|
||||
return;
|
||||
}
|
||||
err = nilfs_transaction_begin(sb, &ti, 0);
|
||||
BUG_ON(err);
|
||||
if (inode->i_data.nrpages)
|
||||
truncate_inode_pages(&inode->i_data, 0);
|
||||
|
||||
nilfs_truncate_bmap(ii, 0);
|
||||
nilfs_free_inode(inode);
|
||||
/* nilfs_free_inode() marks inode buffer dirty */
|
||||
if (IS_SYNC(inode))
|
||||
nilfs_set_transaction_flag(NILFS_TI_SYNC);
|
||||
nilfs_transaction_end(sb, 1);
|
||||
/* May construct a logical segment and may fail in sync mode.
|
||||
But delete_inode has no return value. */
|
||||
}
|
||||
|
||||
int nilfs_setattr(struct dentry *dentry, struct iattr *iattr)
|
||||
{
|
||||
struct nilfs_transaction_info ti;
|
||||
struct inode *inode = dentry->d_inode;
|
||||
struct super_block *sb = inode->i_sb;
|
||||
int err, err2;
|
||||
|
||||
err = inode_change_ok(inode, iattr);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
err = nilfs_transaction_begin(sb, &ti, 0);
|
||||
if (unlikely(err))
|
||||
return err;
|
||||
err = inode_setattr(inode, iattr);
|
||||
if (!err && (iattr->ia_valid & ATTR_MODE))
|
||||
err = nilfs_acl_chmod(inode);
|
||||
err2 = nilfs_transaction_end(sb, 1);
|
||||
return err ? : err2;
|
||||
}
|
||||
|
||||
int nilfs_load_inode_block(struct nilfs_sb_info *sbi, struct inode *inode,
|
||||
struct buffer_head **pbh)
|
||||
{
|
||||
struct nilfs_inode_info *ii = NILFS_I(inode);
|
||||
int err;
|
||||
|
||||
spin_lock(&sbi->s_inode_lock);
|
||||
/* Caller of this function MUST lock s_inode_lock */
|
||||
if (ii->i_bh == NULL) {
|
||||
spin_unlock(&sbi->s_inode_lock);
|
||||
err = nilfs_ifile_get_inode_block(sbi->s_ifile, inode->i_ino,
|
||||
pbh);
|
||||
if (unlikely(err))
|
||||
return err;
|
||||
spin_lock(&sbi->s_inode_lock);
|
||||
if (ii->i_bh == NULL)
|
||||
ii->i_bh = *pbh;
|
||||
else {
|
||||
brelse(*pbh);
|
||||
*pbh = ii->i_bh;
|
||||
}
|
||||
} else
|
||||
*pbh = ii->i_bh;
|
||||
|
||||
get_bh(*pbh);
|
||||
spin_unlock(&sbi->s_inode_lock);
|
||||
return 0;
|
||||
}
|
||||
|
||||
int nilfs_inode_dirty(struct inode *inode)
|
||||
{
|
||||
struct nilfs_inode_info *ii = NILFS_I(inode);
|
||||
struct nilfs_sb_info *sbi = NILFS_SB(inode->i_sb);
|
||||
int ret = 0;
|
||||
|
||||
if (!list_empty(&ii->i_dirty)) {
|
||||
spin_lock(&sbi->s_inode_lock);
|
||||
ret = test_bit(NILFS_I_DIRTY, &ii->i_state) ||
|
||||
test_bit(NILFS_I_BUSY, &ii->i_state);
|
||||
spin_unlock(&sbi->s_inode_lock);
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
int nilfs_set_file_dirty(struct nilfs_sb_info *sbi, struct inode *inode,
|
||||
unsigned nr_dirty)
|
||||
{
|
||||
struct nilfs_inode_info *ii = NILFS_I(inode);
|
||||
|
||||
atomic_add(nr_dirty, &sbi->s_nilfs->ns_ndirtyblks);
|
||||
|
||||
if (test_and_set_bit(NILFS_I_DIRTY, &ii->i_state) ||
|
||||
unlikely(inode->i_ino == NILFS_SKETCH_INO))
|
||||
return 0;
|
||||
|
||||
spin_lock(&sbi->s_inode_lock);
|
||||
if (!test_bit(NILFS_I_QUEUED, &ii->i_state) &&
|
||||
!test_bit(NILFS_I_BUSY, &ii->i_state)) {
|
||||
/* Because this routine may race with nilfs_dispose_list(),
|
||||
we have to check NILFS_I_QUEUED here, too. */
|
||||
if (list_empty(&ii->i_dirty) && igrab(inode) == NULL) {
|
||||
/* This will happen when somebody is freeing
|
||||
this inode. */
|
||||
nilfs_warning(sbi->s_super, __func__,
|
||||
"cannot get inode (ino=%lu)\n",
|
||||
inode->i_ino);
|
||||
spin_unlock(&sbi->s_inode_lock);
|
||||
return -EINVAL; /* NILFS_I_DIRTY may remain for
|
||||
freeing inode */
|
||||
}
|
||||
list_del(&ii->i_dirty);
|
||||
list_add_tail(&ii->i_dirty, &sbi->s_dirty_files);
|
||||
set_bit(NILFS_I_QUEUED, &ii->i_state);
|
||||
}
|
||||
spin_unlock(&sbi->s_inode_lock);
|
||||
return 0;
|
||||
}
|
||||
|
||||
int nilfs_mark_inode_dirty(struct inode *inode)
|
||||
{
|
||||
struct nilfs_sb_info *sbi = NILFS_SB(inode->i_sb);
|
||||
struct buffer_head *ibh;
|
||||
int err;
|
||||
|
||||
err = nilfs_load_inode_block(sbi, inode, &ibh);
|
||||
if (unlikely(err)) {
|
||||
nilfs_warning(inode->i_sb, __func__,
|
||||
"failed to reget inode block.\n");
|
||||
return err;
|
||||
}
|
||||
lock_buffer(ibh);
|
||||
nilfs_update_inode(inode, ibh);
|
||||
unlock_buffer(ibh);
|
||||
nilfs_mdt_mark_buffer_dirty(ibh);
|
||||
nilfs_mdt_mark_dirty(sbi->s_ifile);
|
||||
brelse(ibh);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* nilfs_dirty_inode - reflect changes on given inode to an inode block.
|
||||
* @inode: inode of the file to be registered.
|
||||
*
|
||||
* nilfs_dirty_inode() loads a inode block containing the specified
|
||||
* @inode and copies data from a nilfs_inode to a corresponding inode
|
||||
* entry in the inode block. This operation is excluded from the segment
|
||||
* construction. This function can be called both as a single operation
|
||||
* and as a part of indivisible file operations.
|
||||
*/
|
||||
void nilfs_dirty_inode(struct inode *inode)
|
||||
{
|
||||
struct nilfs_transaction_info ti;
|
||||
|
||||
if (is_bad_inode(inode)) {
|
||||
nilfs_warning(inode->i_sb, __func__,
|
||||
"tried to mark bad_inode dirty. ignored.\n");
|
||||
dump_stack();
|
||||
return;
|
||||
}
|
||||
nilfs_transaction_begin(inode->i_sb, &ti, 0);
|
||||
if (likely(inode->i_ino != NILFS_SKETCH_INO))
|
||||
nilfs_mark_inode_dirty(inode);
|
||||
nilfs_transaction_end(inode->i_sb, 1); /* never fails */
|
||||
}
|
Loading…
Reference in a new issue