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authorLorenzo Pieralisi <lorenzo.pieralisi@arm.com>2015-01-27 13:01:45 -0500
committerBjorn Helgaas <bhelgaas@google.com>2015-01-28 18:08:20 -0500
commitd2be00c0fb5ae0794deffcdb0425cd5a8d823db0 (patch)
tree6f0a31e8a236f9278c15b40988f4ea23fbfdc496 /lib/raid6/Makefile
parent97bf6af1f928216fd6c5a66e8a57bfa95a659672 (diff)
of/pci: Free resources on failure in of_pci_get_host_bridge_resources()
In the function of_pci_get_host_bridge_resources() if the parsing of ranges fails, previously allocated resources inclusive of bus_range are not freed and are not expected to be freed by the function caller on error return. This patch fixes the issues by adding code that properly frees resources and bus_range before exiting the function with an error return value. Fixes: cbe4097f8ae6 ("of/pci: Add support for parsing PCI host bridge resources from DT") Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Liviu Dudau <liviu.dudau@arm.com> CC: Arnd Bergmann <arnd@arndb.de> CC: Rob Herring <robh+dt@kernel.org>
Diffstat (limited to 'lib/raid6/Makefile')
0 files changed, 0 insertions, 0 deletions
generated by cgit v1.2.2 (git 2.25.0) at 2026-01-20 12:22:30 -0500
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/*
 *   Copyright (C) International Business Machines Corp., 2000-2004
 *
 *   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
 */

/*
 * Module: jfs_mount.c
 *
 * note: file system in transition to aggregate/fileset:
 *
 * file system mount is interpreted as the mount of aggregate,
 * if not already mounted, and mount of the single/only fileset in
 * the aggregate;
 *
 * a file system/aggregate is represented by an internal inode
 * (aka mount inode) initialized with aggregate superblock;
 * each vfs represents a fileset, and points to its "fileset inode
 * allocation map inode" (aka fileset inode):
 * (an aggregate itself is structured recursively as a filset:
 * an internal vfs is constructed and points to its "fileset inode
 * allocation map inode" (aka aggregate inode) where each inode
 * represents a fileset inode) so that inode number is mapped to
 * on-disk inode in uniform way at both aggregate and fileset level;
 *
 * each vnode/inode of a fileset is linked to its vfs (to facilitate
 * per fileset inode operations, e.g., unmount of a fileset, etc.);
 * each inode points to the mount inode (to facilitate access to
 * per aggregate information, e.g., block size, etc.) as well as
 * its file set inode.
 *
 *   aggregate
 *   ipmnt
 *   mntvfs -> fileset ipimap+ -> aggregate ipbmap -> aggregate ipaimap;
 *             fileset vfs     -> vp(1) <-> ... <-> vp(n) <->vproot;
 */

#include <linux/fs.h>
#include <linux/buffer_head.h>

#include "jfs_incore.h"
#include "jfs_filsys.h"
#include "jfs_superblock.h"
#include "jfs_dmap.h"
#include "jfs_imap.h"
#include "jfs_metapage.h"
#include "jfs_debug.h"


/*
 * forward references
 */
static int chkSuper(struct super_block *);
static int logMOUNT(struct super_block *sb);

/*
 * NAME:	jfs_mount(sb)
 *
 * FUNCTION:	vfs_mount()
 *
 * PARAMETER:	sb	- super block
 *
 * RETURN:	-EBUSY	- device already mounted or open for write
 *		-EBUSY	- cvrdvp already mounted;
 *		-EBUSY	- mount table full
 *		-ENOTDIR- cvrdvp not directory on a device mount
 *		-ENXIO	- device open failure
 */
int jfs_mount(struct super_block *sb)
{
	int rc = 0;		/* Return code */
	struct jfs_sb_info *sbi = JFS_SBI(sb);
	struct inode *ipaimap = NULL;
	struct inode *ipaimap2 = NULL;
	struct inode *ipimap = NULL;
	struct inode *ipbmap = NULL;

	/*
	 * read/validate superblock
	 * (initialize mount inode from the superblock)
	 */
	if ((rc = chkSuper(sb))) {
		goto errout20;
	}

	ipaimap = diReadSpecial(sb, AGGREGATE_I, 0);
	if (ipaimap == NULL) {
		jfs_err("jfs_mount: Faild to read AGGREGATE_I");
		rc = -EIO;
		goto errout20;
	}
	sbi->ipaimap = ipaimap;

	jfs_info("jfs_mount: ipaimap:0x%p", ipaimap);

	/*
	 * initialize aggregate inode allocation map
	 */
	if ((rc = diMount(ipaimap))) {
		jfs_err("jfs_mount: diMount(ipaimap) failed w/rc = %d", rc);
		goto errout21;
	}

	/*
	 * open aggregate block allocation map
	 */
	ipbmap = diReadSpecial(sb, BMAP_I, 0);
	if (ipbmap == NULL) {
		rc = -EIO;
		goto errout22;
	}

	jfs_info("jfs_mount: ipbmap:0x%p", ipbmap);

	sbi->ipbmap = ipbmap;

	/*
	 * initialize aggregate block allocation map
	 */
	if ((rc = dbMount(ipbmap))) {
		jfs_err("jfs_mount: dbMount failed w/rc = %d", rc);
		goto errout22;
	}

	/*
	 * open the secondary aggregate inode allocation map
	 *
	 * This is a duplicate of the aggregate inode allocation map.
	 *
	 * hand craft a vfs in the same fashion as we did to read ipaimap.
	 * By adding INOSPEREXT (32) to the inode number, we are telling
	 * diReadSpecial that we are reading from the secondary aggregate
	 * inode table.  This also creates a unique entry in the inode hash
	 * table.
	 */
	if ((sbi->mntflag & JFS_BAD_SAIT) == 0) {
		ipaimap2 = diReadSpecial(sb, AGGREGATE_I, 1);
		if (!ipaimap2) {
			jfs_err("jfs_mount: Faild to read AGGREGATE_I");
			rc = -EIO;
			goto errout35;
		}
		sbi->ipaimap2 = ipaimap2;

		jfs_info("jfs_mount: ipaimap2:0x%p", ipaimap2);

		/*
		 * initialize secondary aggregate inode allocation map
		 */
		if ((rc = diMount(ipaimap2))) {
			jfs_err("jfs_mount: diMount(ipaimap2) failed, rc = %d",
				rc);
			goto errout35;
		}
	} else
		/* Secondary aggregate inode table is not valid */
		sbi->ipaimap2 = NULL;

	/*
	 *	mount (the only/single) fileset
	 */
	/*
	 * open fileset inode allocation map (aka fileset inode)
	 */
	ipimap = diReadSpecial(sb, FILESYSTEM_I, 0);
	if (ipimap == NULL) {
		jfs_err("jfs_mount: Failed to read FILESYSTEM_I");
		/* open fileset secondary inode allocation map */
		rc = -EIO;
		goto errout40;
	}
	jfs_info("jfs_mount: ipimap:0x%p", ipimap);

	/* map further access of per fileset inodes by the fileset inode */
	sbi->ipimap = ipimap;

	/* initialize fileset inode allocation map */
	if ((rc = diMount(ipimap))) {
		jfs_err("jfs_mount: diMount failed w/rc = %d", rc);
		goto errout41;
	}

	goto out;

	/*
	 *	unwind on error
	 */
      errout41:		/* close fileset inode allocation map inode */
	diFreeSpecial(ipimap);

      errout40:		/* fileset closed */

	/* close secondary aggregate inode allocation map */
	if (ipaimap2) {
		diUnmount(ipaimap2, 1);
		diFreeSpecial(ipaimap2);
	}

      errout35:

	/* close aggregate block allocation map */
	dbUnmount(ipbmap, 1);
	diFreeSpecial(ipbmap);

      errout22:		/* close aggregate inode allocation map */

	diUnmount(ipaimap, 1);

      errout21:		/* close aggregate inodes */
	diFreeSpecial(ipaimap);
      errout20:		/* aggregate closed */

      out:

	if (rc)
		jfs_err("Mount JFS Failure: %d", rc);

	return rc;
}

/*
 * NAME:	jfs_mount_rw(sb, remount)
 *
 * FUNCTION:	Completes read-write mount, or remounts read-only volume
 *		as read-write
 */
int jfs_mount_rw(struct super_block *sb, int remount)
{
	struct jfs_sb_info *sbi = JFS_SBI(sb);
	int rc;

	/*
	 * If we are re-mounting a previously read-only volume, we want to
	 * re-read the inode and block maps, since fsck.jfs may have updated
	 * them.
	 */
	if (remount) {
		if (chkSuper(sb) || (sbi->state != FM_CLEAN))
			return -EINVAL;

		truncate_inode_pages(sbi->ipimap->i_mapping, 0);
		truncate_inode_pages(sbi->ipbmap->i_mapping, 0);
		diUnmount(sbi->ipimap, 1);
		if ((rc = diMount(sbi->ipimap))) {
			jfs_err("jfs_mount_rw: diMount failed!");
			return rc;
		}

		dbUnmount(sbi->ipbmap, 1);
		if ((rc = dbMount(sbi->ipbmap))) {
			jfs_err("jfs_mount_rw: dbMount failed!");
			return rc;
		}
	}

	/*
	 * open/initialize log
	 */
	if ((rc = lmLogOpen(sb)))
		return rc;

	/*
	 * update file system superblock;
	 */
	if ((rc = updateSuper(sb, FM_MOUNT))) {
		jfs_err("jfs_mount: updateSuper failed w/rc = %d", rc);
		lmLogClose(sb);
		return rc;
	}

	/*
	 * write MOUNT log record of the file system
	 */
	logMOUNT(sb);

	return rc;
}

/*
 *	chkSuper()
 *
 * validate the superblock of the file system to be mounted and
 * get the file system parameters.
 *
 * returns
 *	0 with fragsize set if check successful
 *	error code if not successful
 */
static int chkSuper(struct super_block *sb)
{
	int rc = 0;
	struct jfs_sb_info *sbi = JFS_SBI(sb);
	struct jfs_superblock *j_sb;
	struct buffer_head *bh;
	int AIM_bytesize, AIT_bytesize;
	int expected_AIM_bytesize, expected_AIT_bytesize;
	s64 AIM_byte_addr, AIT_byte_addr, fsckwsp_addr;
	s64 byte_addr_diff0, byte_addr_diff1;
	s32 bsize;

	if ((rc = readSuper(sb, &bh)))
		return rc;
	j_sb = (struct jfs_superblock *)bh->b_data;

	/*
	 * validate superblock
	 */
	/* validate fs signature */
	if (strncmp(j_sb->s_magic, JFS_MAGIC, 4) ||
	    le32_to_cpu(j_sb->s_version) > JFS_VERSION) {
		rc = -EINVAL;
		goto out;
	}

	bsize = le32_to_cpu(j_sb->s_bsize);
#ifdef _JFS_4K
	if (bsize != PSIZE) {
		jfs_err("Currently only 4K block size supported!");
		rc = -EINVAL;
		goto out;
	}
#endif				/* _JFS_4K */

	jfs_info("superblock: flag:0x%08x state:0x%08x size:0x%Lx",
		 le32_to_cpu(j_sb->s_flag), le32_to_cpu(j_sb->s_state),
		 (unsigned long long) le64_to_cpu(j_sb->s_size));

	/* validate the descriptors for Secondary AIM and AIT */
	if ((j_sb->s_flag & cpu_to_le32(JFS_BAD_SAIT)) !=
	    cpu_to_le32(JFS_BAD_SAIT)) {
		expected_AIM_bytesize = 2 * PSIZE;
		AIM_bytesize = lengthPXD(&(j_sb->s_aim2)) * bsize;
		expected_AIT_bytesize = 4 * PSIZE;
		AIT_bytesize = lengthPXD(&(j_sb->s_ait2)) * bsize;
		AIM_byte_addr = addressPXD(&(j_sb->s_aim2)) * bsize;
		AIT_byte_addr = addressPXD(&(j_sb->s_ait2)) * bsize;
		byte_addr_diff0 = AIT_byte_addr - AIM_byte_addr;
		fsckwsp_addr = addressPXD(&(j_sb->s_fsckpxd)) * bsize;
		byte_addr_diff1 = fsckwsp_addr - AIT_byte_addr;
		if ((AIM_bytesize != expected_AIM_bytesize) ||
		    (AIT_bytesize != expected_AIT_bytesize) ||
		    (byte_addr_diff0 != AIM_bytesize) ||
		    (byte_addr_diff1 <= AIT_bytesize))
			j_sb->s_flag |= cpu_to_le32(JFS_BAD_SAIT);
	}

	if ((j_sb->s_flag & cpu_to_le32(JFS_GROUPCOMMIT)) !=
	    cpu_to_le32(JFS_GROUPCOMMIT))
		j_sb->s_flag |= cpu_to_le32(JFS_GROUPCOMMIT);

	/* validate fs state */
	if (j_sb->s_state != cpu_to_le32(FM_CLEAN) &&
	    !(sb->s_flags & MS_RDONLY)) {
		jfs_err("jfs_mount: Mount Failure: File System Dirty.");
		rc = -EINVAL;
		goto out;
	}

	sbi->state = le32_to_cpu(j_sb->s_state);
	sbi->mntflag = le32_to_cpu(j_sb->s_flag);

	/*
	 * JFS always does I/O by 4K pages.  Don't tell the buffer cache
	 * that we use anything else (leave s_blocksize alone).
	 */
	sbi->bsize = bsize;
	sbi->l2bsize = le16_to_cpu(j_sb->s_l2bsize);

	/*
	 * For now, ignore s_pbsize, l2bfactor.  All I/O going through buffer
	 * cache.
	 */
	sbi->nbperpage = PSIZE >> sbi->l2bsize;
	sbi->l2nbperpage = L2PSIZE - sbi->l2bsize;
	sbi->l2niperblk = sbi->l2bsize - L2DISIZE;
	if (sbi->mntflag & JFS_INLINELOG)
		sbi->logpxd = j_sb->s_logpxd;
	else {
		sbi->logdev = new_decode_dev(le32_to_cpu(j_sb->s_logdev));
		memcpy(sbi->uuid, j_sb->s_uuid, sizeof(sbi->uuid));
		memcpy(sbi->loguuid, j_sb->s_loguuid, sizeof(sbi->uuid));
	}
	sbi->fsckpxd = j_sb->s_fsckpxd;
	sbi->ait2 = j_sb->s_ait2;

      out:
	brelse(bh);
	return rc;
}


/*
 *	updateSuper()
 *
 * update synchronously superblock if it is mounted read-write.
 */