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Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 59 temple place suite 330 boston ma 02111 1307 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 1334 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
536 lines
14 KiB
C
536 lines
14 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) International Business Machines Corp., 2000-2004
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*/
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#include <linux/fs.h>
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#include <linux/buffer_head.h>
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#include <linux/quotaops.h>
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#include "jfs_incore.h"
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#include "jfs_filsys.h"
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#include "jfs_metapage.h"
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#include "jfs_dinode.h"
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#include "jfs_imap.h"
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#include "jfs_dmap.h"
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#include "jfs_superblock.h"
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#include "jfs_txnmgr.h"
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#include "jfs_debug.h"
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#define BITSPERPAGE (PSIZE << 3)
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#define L2MEGABYTE 20
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#define MEGABYTE (1 << L2MEGABYTE)
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#define MEGABYTE32 (MEGABYTE << 5)
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/* convert block number to bmap file page number */
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#define BLKTODMAPN(b)\
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(((b) >> 13) + ((b) >> 23) + ((b) >> 33) + 3 + 1)
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/*
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* jfs_extendfs()
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*
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* function: extend file system;
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*
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* |-------------------------------|----------|----------|
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* file system space fsck inline log
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* workspace space
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*
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* input:
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* new LVSize: in LV blocks (required)
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* new LogSize: in LV blocks (optional)
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* new FSSize: in LV blocks (optional)
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*
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* new configuration:
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* 1. set new LogSize as specified or default from new LVSize;
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* 2. compute new FSCKSize from new LVSize;
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* 3. set new FSSize as MIN(FSSize, LVSize-(LogSize+FSCKSize)) where
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* assert(new FSSize >= old FSSize),
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* i.e., file system must not be shrunk;
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*/
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int jfs_extendfs(struct super_block *sb, s64 newLVSize, int newLogSize)
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{
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int rc = 0;
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struct jfs_sb_info *sbi = JFS_SBI(sb);
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struct inode *ipbmap = sbi->ipbmap;
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struct inode *ipbmap2;
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struct inode *ipimap = sbi->ipimap;
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struct jfs_log *log = sbi->log;
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struct bmap *bmp = sbi->bmap;
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s64 newLogAddress, newFSCKAddress;
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int newFSCKSize;
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s64 newMapSize = 0, mapSize;
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s64 XAddress, XSize, nblocks, xoff, xaddr, t64;
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s64 oldLVSize;
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s64 newFSSize;
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s64 VolumeSize;
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int newNpages = 0, nPages, newPage, xlen, t32;
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int tid;
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int log_formatted = 0;
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struct inode *iplist[1];
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struct jfs_superblock *j_sb, *j_sb2;
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s64 old_agsize;
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int agsizechanged = 0;
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struct buffer_head *bh, *bh2;
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/* If the volume hasn't grown, get out now */
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if (sbi->mntflag & JFS_INLINELOG)
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oldLVSize = addressPXD(&sbi->logpxd) + lengthPXD(&sbi->logpxd);
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else
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oldLVSize = addressPXD(&sbi->fsckpxd) +
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lengthPXD(&sbi->fsckpxd);
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if (oldLVSize >= newLVSize) {
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printk(KERN_WARNING
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"jfs_extendfs: volume hasn't grown, returning\n");
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goto out;
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}
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VolumeSize = i_size_read(sb->s_bdev->bd_inode) >> sb->s_blocksize_bits;
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if (VolumeSize) {
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if (newLVSize > VolumeSize) {
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printk(KERN_WARNING "jfs_extendfs: invalid size\n");
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rc = -EINVAL;
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goto out;
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}
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} else {
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/* check the device */
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bh = sb_bread(sb, newLVSize - 1);
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if (!bh) {
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printk(KERN_WARNING "jfs_extendfs: invalid size\n");
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rc = -EINVAL;
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goto out;
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}
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bforget(bh);
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}
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/* Can't extend write-protected drive */
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if (isReadOnly(ipbmap)) {
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printk(KERN_WARNING "jfs_extendfs: read-only file system\n");
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rc = -EROFS;
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goto out;
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}
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/*
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* reconfigure LV spaces
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* ---------------------
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*
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* validate new size, or, if not specified, determine new size
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*/
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/*
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* reconfigure inline log space:
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*/
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if ((sbi->mntflag & JFS_INLINELOG)) {
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if (newLogSize == 0) {
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/*
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* no size specified: default to 1/256 of aggregate
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* size; rounded up to a megabyte boundary;
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*/
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newLogSize = newLVSize >> 8;
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t32 = (1 << (20 - sbi->l2bsize)) - 1;
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newLogSize = (newLogSize + t32) & ~t32;
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newLogSize =
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min(newLogSize, MEGABYTE32 >> sbi->l2bsize);
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} else {
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/*
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* convert the newLogSize to fs blocks.
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*
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* Since this is given in megabytes, it will always be
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* an even number of pages.
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*/
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newLogSize = (newLogSize * MEGABYTE) >> sbi->l2bsize;
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}
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} else
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newLogSize = 0;
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newLogAddress = newLVSize - newLogSize;
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/*
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* reconfigure fsck work space:
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*
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* configure it to the end of the logical volume regardless of
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* whether file system extends to the end of the aggregate;
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* Need enough 4k pages to cover:
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* - 1 bit per block in aggregate rounded up to BPERDMAP boundary
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* - 1 extra page to handle control page and intermediate level pages
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* - 50 extra pages for the chkdsk service log
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*/
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t64 = ((newLVSize - newLogSize + BPERDMAP - 1) >> L2BPERDMAP)
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<< L2BPERDMAP;
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t32 = DIV_ROUND_UP(t64, BITSPERPAGE) + 1 + 50;
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newFSCKSize = t32 << sbi->l2nbperpage;
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newFSCKAddress = newLogAddress - newFSCKSize;
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/*
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* compute new file system space;
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*/
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newFSSize = newLVSize - newLogSize - newFSCKSize;
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/* file system cannot be shrunk */
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if (newFSSize < bmp->db_mapsize) {
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rc = -EINVAL;
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goto out;
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}
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/*
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* If we're expanding enough that the inline log does not overlap
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* the old one, we can format the new log before we quiesce the
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* filesystem.
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*/
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if ((sbi->mntflag & JFS_INLINELOG) && (newLogAddress > oldLVSize)) {
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if ((rc = lmLogFormat(log, newLogAddress, newLogSize)))
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goto out;
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log_formatted = 1;
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}
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/*
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* quiesce file system
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*
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* (prepare to move the inline log and to prevent map update)
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*
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* block any new transactions and wait for completion of
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* all wip transactions and flush modified pages s.t.
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* on-disk file system is in consistent state and
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* log is not required for recovery.
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*/
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txQuiesce(sb);
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/* Reset size of direct inode */
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sbi->direct_inode->i_size = i_size_read(sb->s_bdev->bd_inode);
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if (sbi->mntflag & JFS_INLINELOG) {
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/*
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* deactivate old inline log
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*/
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lmLogShutdown(log);
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/*
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* mark on-disk super block for fs in transition;
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*
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* update on-disk superblock for the new space configuration
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* of inline log space and fsck work space descriptors:
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* N.B. FS descriptor is NOT updated;
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*
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* crash recovery:
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* logredo(): if FM_EXTENDFS, return to fsck() for cleanup;
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* fsck(): if FM_EXTENDFS, reformat inline log and fsck
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* workspace from superblock inline log descriptor and fsck
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* workspace descriptor;
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*/
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/* read in superblock */
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if ((rc = readSuper(sb, &bh)))
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goto error_out;
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j_sb = (struct jfs_superblock *)bh->b_data;
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/* mark extendfs() in progress */
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j_sb->s_state |= cpu_to_le32(FM_EXTENDFS);
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j_sb->s_xsize = cpu_to_le64(newFSSize);
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PXDaddress(&j_sb->s_xfsckpxd, newFSCKAddress);
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PXDlength(&j_sb->s_xfsckpxd, newFSCKSize);
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PXDaddress(&j_sb->s_xlogpxd, newLogAddress);
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PXDlength(&j_sb->s_xlogpxd, newLogSize);
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/* synchronously update superblock */
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mark_buffer_dirty(bh);
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sync_dirty_buffer(bh);
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brelse(bh);
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/*
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* format new inline log synchronously;
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*
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* crash recovery: if log move in progress,
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* reformat log and exit success;
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*/
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if (!log_formatted)
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if ((rc = lmLogFormat(log, newLogAddress, newLogSize)))
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goto error_out;
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/*
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* activate new log
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*/
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log->base = newLogAddress;
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log->size = newLogSize >> (L2LOGPSIZE - sb->s_blocksize_bits);
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if ((rc = lmLogInit(log)))
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goto error_out;
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}
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/*
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* extend block allocation map
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* ---------------------------
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*
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* extendfs() for new extension, retry after crash recovery;
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*
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* note: both logredo() and fsck() rebuild map from
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* the bitmap and configuration parameter from superblock
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* (disregarding all other control information in the map);
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*
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* superblock:
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* s_size: aggregate size in physical blocks;
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*/
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/*
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* compute the new block allocation map configuration
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*
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* map dinode:
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* di_size: map file size in byte;
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* di_nblocks: number of blocks allocated for map file;
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* di_mapsize: number of blocks in aggregate (covered by map);
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* map control page:
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* db_mapsize: number of blocks in aggregate (covered by map);
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*/
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newMapSize = newFSSize;
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/* number of data pages of new bmap file:
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* roundup new size to full dmap page boundary and
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* add 1 extra dmap page for next extendfs()
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*/
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t64 = (newMapSize - 1) + BPERDMAP;
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newNpages = BLKTODMAPN(t64) + 1;
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/*
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* extend map from current map (WITHOUT growing mapfile)
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*
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* map new extension with unmapped part of the last partial
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* dmap page, if applicable, and extra page(s) allocated
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* at end of bmap by mkfs() or previous extendfs();
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*/
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extendBmap:
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/* compute number of blocks requested to extend */
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mapSize = bmp->db_mapsize;
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XAddress = mapSize; /* eXtension Address */
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XSize = newMapSize - mapSize; /* eXtension Size */
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old_agsize = bmp->db_agsize; /* We need to know if this changes */
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/* compute number of blocks that can be extended by current mapfile */
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t64 = dbMapFileSizeToMapSize(ipbmap);
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if (mapSize > t64) {
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printk(KERN_ERR "jfs_extendfs: mapSize (0x%Lx) > t64 (0x%Lx)\n",
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(long long) mapSize, (long long) t64);
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rc = -EIO;
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goto error_out;
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}
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nblocks = min(t64 - mapSize, XSize);
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/*
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* update map pages for new extension:
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*
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* update/init dmap and bubble up the control hierarchy
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* incrementally fold up dmaps into upper levels;
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* update bmap control page;
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*/
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if ((rc = dbExtendFS(ipbmap, XAddress, nblocks)))
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goto error_out;
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agsizechanged |= (bmp->db_agsize != old_agsize);
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/*
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* the map now has extended to cover additional nblocks:
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* dn_mapsize = oldMapsize + nblocks;
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*/
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/* ipbmap->i_mapsize += nblocks; */
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XSize -= nblocks;
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/*
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* grow map file to cover remaining extension
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* and/or one extra dmap page for next extendfs();
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*
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* allocate new map pages and its backing blocks, and
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* update map file xtree
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*/
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/* compute number of data pages of current bmap file */
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nPages = ipbmap->i_size >> L2PSIZE;
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/* need to grow map file ? */
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if (nPages == newNpages)
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goto finalizeBmap;
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/*
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* grow bmap file for the new map pages required:
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*
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* allocate growth at the start of newly extended region;
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* bmap file only grows sequentially, i.e., both data pages
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* and possibly xtree index pages may grow in append mode,
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* s.t. logredo() can reconstruct pre-extension state
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* by washing away bmap file of pages outside s_size boundary;
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*/
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/*
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* journal map file growth as if a regular file growth:
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* (note: bmap is created with di_mode = IFJOURNAL|IFREG);
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*
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* journaling of bmap file growth is not required since
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* logredo() do/can not use log records of bmap file growth
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* but it provides careful write semantics, pmap update, etc.;
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*/
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/* synchronous write of data pages: bmap data pages are
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* cached in meta-data cache, and not written out
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* by txCommit();
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*/
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rc = filemap_fdatawait(ipbmap->i_mapping);
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if (rc)
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goto error_out;
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rc = filemap_write_and_wait(ipbmap->i_mapping);
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if (rc)
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goto error_out;
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diWriteSpecial(ipbmap, 0);
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newPage = nPages; /* first new page number */
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xoff = newPage << sbi->l2nbperpage;
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xlen = (newNpages - nPages) << sbi->l2nbperpage;
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xlen = min(xlen, (int) nblocks) & ~(sbi->nbperpage - 1);
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xaddr = XAddress;
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tid = txBegin(sb, COMMIT_FORCE);
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if ((rc = xtAppend(tid, ipbmap, 0, xoff, nblocks, &xlen, &xaddr, 0))) {
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txEnd(tid);
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goto error_out;
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}
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/* update bmap file size */
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ipbmap->i_size += xlen << sbi->l2bsize;
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inode_add_bytes(ipbmap, xlen << sbi->l2bsize);
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iplist[0] = ipbmap;
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rc = txCommit(tid, 1, &iplist[0], COMMIT_FORCE);
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txEnd(tid);
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if (rc)
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goto error_out;
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/*
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* map file has been grown now to cover extension to further out;
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* di_size = new map file size;
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*
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* if huge extension, the previous extension based on previous
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* map file size may not have been sufficient to cover whole extension
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* (it could have been used up for new map pages),
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* but the newly grown map file now covers lot bigger new free space
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* available for further extension of map;
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*/
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/* any more blocks to extend ? */
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if (XSize)
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goto extendBmap;
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finalizeBmap:
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/* finalize bmap */
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dbFinalizeBmap(ipbmap);
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/*
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* update inode allocation map
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* ---------------------------
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*
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* move iag lists from old to new iag;
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* agstart field is not updated for logredo() to reconstruct
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* iag lists if system crash occurs.
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* (computation of ag number from agstart based on agsize
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* will correctly identify the new ag);
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*/
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/* if new AG size the same as old AG size, done! */
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if (agsizechanged) {
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if ((rc = diExtendFS(ipimap, ipbmap)))
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goto error_out;
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/* finalize imap */
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if ((rc = diSync(ipimap)))
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goto error_out;
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}
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/*
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* finalize
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* --------
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*
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* extension is committed when on-disk super block is
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* updated with new descriptors: logredo will recover
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* crash before it to pre-extension state;
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*/
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/* sync log to skip log replay of bmap file growth transaction; */
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/* lmLogSync(log, 1); */
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/*
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* synchronous write bmap global control page;
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* for crash before completion of write
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* logredo() will recover to pre-extendfs state;
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* for crash after completion of write,
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* logredo() will recover post-extendfs state;
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*/
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if ((rc = dbSync(ipbmap)))
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goto error_out;
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/*
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* copy primary bmap inode to secondary bmap inode
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*/
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ipbmap2 = diReadSpecial(sb, BMAP_I, 1);
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if (ipbmap2 == NULL) {
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printk(KERN_ERR "jfs_extendfs: diReadSpecial(bmap) failed\n");
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goto error_out;
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}
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memcpy(&JFS_IP(ipbmap2)->i_xtroot, &JFS_IP(ipbmap)->i_xtroot, 288);
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ipbmap2->i_size = ipbmap->i_size;
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ipbmap2->i_blocks = ipbmap->i_blocks;
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diWriteSpecial(ipbmap2, 1);
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diFreeSpecial(ipbmap2);
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/*
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* update superblock
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*/
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if ((rc = readSuper(sb, &bh)))
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goto error_out;
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j_sb = (struct jfs_superblock *)bh->b_data;
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/* mark extendfs() completion */
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j_sb->s_state &= cpu_to_le32(~FM_EXTENDFS);
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j_sb->s_size = cpu_to_le64(bmp->db_mapsize <<
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le16_to_cpu(j_sb->s_l2bfactor));
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j_sb->s_agsize = cpu_to_le32(bmp->db_agsize);
|
|
|
|
/* update inline log space descriptor */
|
|
if (sbi->mntflag & JFS_INLINELOG) {
|
|
PXDaddress(&(j_sb->s_logpxd), newLogAddress);
|
|
PXDlength(&(j_sb->s_logpxd), newLogSize);
|
|
}
|
|
|
|
/* record log's mount serial number */
|
|
j_sb->s_logserial = cpu_to_le32(log->serial);
|
|
|
|
/* update fsck work space descriptor */
|
|
PXDaddress(&(j_sb->s_fsckpxd), newFSCKAddress);
|
|
PXDlength(&(j_sb->s_fsckpxd), newFSCKSize);
|
|
j_sb->s_fscklog = 1;
|
|
/* sb->s_fsckloglen remains the same */
|
|
|
|
/* Update secondary superblock */
|
|
bh2 = sb_bread(sb, SUPER2_OFF >> sb->s_blocksize_bits);
|
|
if (bh2) {
|
|
j_sb2 = (struct jfs_superblock *)bh2->b_data;
|
|
memcpy(j_sb2, j_sb, sizeof (struct jfs_superblock));
|
|
|
|
mark_buffer_dirty(bh);
|
|
sync_dirty_buffer(bh2);
|
|
brelse(bh2);
|
|
}
|
|
|
|
/* write primary superblock */
|
|
mark_buffer_dirty(bh);
|
|
sync_dirty_buffer(bh);
|
|
brelse(bh);
|
|
|
|
goto resume;
|
|
|
|
error_out:
|
|
jfs_error(sb, "\n");
|
|
|
|
resume:
|
|
/*
|
|
* resume file system transactions
|
|
*/
|
|
txResume(sb);
|
|
|
|
out:
|
|
return rc;
|
|
}
|