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272e42b215
The log item ops aren't nessecarily the biggest exploit vector, but marking them const is easy enough. Also remove the unused xfs_item_ops_t typedef while we're at it. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Alex Elder <aelder@sgi.com>
1054 lines
30 KiB
C
1054 lines
30 KiB
C
/*
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* Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would 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 the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "xfs.h"
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#include "xfs_fs.h"
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#include "xfs_types.h"
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#include "xfs_bit.h"
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#include "xfs_log.h"
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#include "xfs_inum.h"
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#include "xfs_trans.h"
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#include "xfs_sb.h"
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#include "xfs_ag.h"
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#include "xfs_mount.h"
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#include "xfs_trans_priv.h"
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#include "xfs_bmap_btree.h"
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#include "xfs_dinode.h"
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#include "xfs_inode.h"
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#include "xfs_inode_item.h"
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#include "xfs_error.h"
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#include "xfs_trace.h"
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kmem_zone_t *xfs_ili_zone; /* inode log item zone */
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static inline struct xfs_inode_log_item *INODE_ITEM(struct xfs_log_item *lip)
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{
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return container_of(lip, struct xfs_inode_log_item, ili_item);
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}
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/*
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* This returns the number of iovecs needed to log the given inode item.
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*
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* We need one iovec for the inode log format structure, one for the
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* inode core, and possibly one for the inode data/extents/b-tree root
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* and one for the inode attribute data/extents/b-tree root.
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*/
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STATIC uint
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xfs_inode_item_size(
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struct xfs_log_item *lip)
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{
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struct xfs_inode_log_item *iip = INODE_ITEM(lip);
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struct xfs_inode *ip = iip->ili_inode;
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uint nvecs = 2;
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/*
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* Only log the data/extents/b-tree root if there is something
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* left to log.
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*/
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iip->ili_format.ilf_fields |= XFS_ILOG_CORE;
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switch (ip->i_d.di_format) {
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case XFS_DINODE_FMT_EXTENTS:
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iip->ili_format.ilf_fields &=
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~(XFS_ILOG_DDATA | XFS_ILOG_DBROOT |
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XFS_ILOG_DEV | XFS_ILOG_UUID);
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if ((iip->ili_format.ilf_fields & XFS_ILOG_DEXT) &&
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(ip->i_d.di_nextents > 0) &&
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(ip->i_df.if_bytes > 0)) {
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ASSERT(ip->i_df.if_u1.if_extents != NULL);
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nvecs++;
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} else {
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iip->ili_format.ilf_fields &= ~XFS_ILOG_DEXT;
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}
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break;
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case XFS_DINODE_FMT_BTREE:
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ASSERT(ip->i_df.if_ext_max ==
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XFS_IFORK_DSIZE(ip) / (uint)sizeof(xfs_bmbt_rec_t));
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iip->ili_format.ilf_fields &=
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~(XFS_ILOG_DDATA | XFS_ILOG_DEXT |
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XFS_ILOG_DEV | XFS_ILOG_UUID);
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if ((iip->ili_format.ilf_fields & XFS_ILOG_DBROOT) &&
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(ip->i_df.if_broot_bytes > 0)) {
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ASSERT(ip->i_df.if_broot != NULL);
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nvecs++;
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} else {
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ASSERT(!(iip->ili_format.ilf_fields &
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XFS_ILOG_DBROOT));
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#ifdef XFS_TRANS_DEBUG
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if (iip->ili_root_size > 0) {
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ASSERT(iip->ili_root_size ==
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ip->i_df.if_broot_bytes);
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ASSERT(memcmp(iip->ili_orig_root,
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ip->i_df.if_broot,
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iip->ili_root_size) == 0);
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} else {
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ASSERT(ip->i_df.if_broot_bytes == 0);
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}
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#endif
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iip->ili_format.ilf_fields &= ~XFS_ILOG_DBROOT;
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}
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break;
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case XFS_DINODE_FMT_LOCAL:
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iip->ili_format.ilf_fields &=
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~(XFS_ILOG_DEXT | XFS_ILOG_DBROOT |
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XFS_ILOG_DEV | XFS_ILOG_UUID);
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if ((iip->ili_format.ilf_fields & XFS_ILOG_DDATA) &&
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(ip->i_df.if_bytes > 0)) {
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ASSERT(ip->i_df.if_u1.if_data != NULL);
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ASSERT(ip->i_d.di_size > 0);
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nvecs++;
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} else {
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iip->ili_format.ilf_fields &= ~XFS_ILOG_DDATA;
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}
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break;
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case XFS_DINODE_FMT_DEV:
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iip->ili_format.ilf_fields &=
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~(XFS_ILOG_DDATA | XFS_ILOG_DBROOT |
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XFS_ILOG_DEXT | XFS_ILOG_UUID);
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break;
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case XFS_DINODE_FMT_UUID:
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iip->ili_format.ilf_fields &=
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~(XFS_ILOG_DDATA | XFS_ILOG_DBROOT |
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XFS_ILOG_DEXT | XFS_ILOG_DEV);
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break;
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default:
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ASSERT(0);
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break;
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}
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/*
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* If there are no attributes associated with this file,
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* then there cannot be anything more to log.
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* Clear all attribute-related log flags.
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*/
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if (!XFS_IFORK_Q(ip)) {
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iip->ili_format.ilf_fields &=
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~(XFS_ILOG_ADATA | XFS_ILOG_ABROOT | XFS_ILOG_AEXT);
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return nvecs;
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}
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/*
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* Log any necessary attribute data.
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*/
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switch (ip->i_d.di_aformat) {
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case XFS_DINODE_FMT_EXTENTS:
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iip->ili_format.ilf_fields &=
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~(XFS_ILOG_ADATA | XFS_ILOG_ABROOT);
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if ((iip->ili_format.ilf_fields & XFS_ILOG_AEXT) &&
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(ip->i_d.di_anextents > 0) &&
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(ip->i_afp->if_bytes > 0)) {
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ASSERT(ip->i_afp->if_u1.if_extents != NULL);
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nvecs++;
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} else {
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iip->ili_format.ilf_fields &= ~XFS_ILOG_AEXT;
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}
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break;
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case XFS_DINODE_FMT_BTREE:
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iip->ili_format.ilf_fields &=
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~(XFS_ILOG_ADATA | XFS_ILOG_AEXT);
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if ((iip->ili_format.ilf_fields & XFS_ILOG_ABROOT) &&
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(ip->i_afp->if_broot_bytes > 0)) {
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ASSERT(ip->i_afp->if_broot != NULL);
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nvecs++;
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} else {
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iip->ili_format.ilf_fields &= ~XFS_ILOG_ABROOT;
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}
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break;
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case XFS_DINODE_FMT_LOCAL:
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iip->ili_format.ilf_fields &=
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~(XFS_ILOG_AEXT | XFS_ILOG_ABROOT);
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if ((iip->ili_format.ilf_fields & XFS_ILOG_ADATA) &&
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(ip->i_afp->if_bytes > 0)) {
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ASSERT(ip->i_afp->if_u1.if_data != NULL);
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nvecs++;
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} else {
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iip->ili_format.ilf_fields &= ~XFS_ILOG_ADATA;
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}
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break;
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default:
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ASSERT(0);
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break;
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}
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return nvecs;
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}
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/*
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* xfs_inode_item_format_extents - convert in-core extents to on-disk form
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*
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* For either the data or attr fork in extent format, we need to endian convert
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* the in-core extent as we place them into the on-disk inode. In this case, we
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* need to do this conversion before we write the extents into the log. Because
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* we don't have the disk inode to write into here, we allocate a buffer and
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* format the extents into it via xfs_iextents_copy(). We free the buffer in
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* the unlock routine after the copy for the log has been made.
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*
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* In the case of the data fork, the in-core and on-disk fork sizes can be
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* different due to delayed allocation extents. We only log on-disk extents
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* here, so always use the physical fork size to determine the size of the
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* buffer we need to allocate.
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*/
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STATIC void
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xfs_inode_item_format_extents(
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struct xfs_inode *ip,
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struct xfs_log_iovec *vecp,
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int whichfork,
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int type)
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{
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xfs_bmbt_rec_t *ext_buffer;
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ext_buffer = kmem_alloc(XFS_IFORK_SIZE(ip, whichfork), KM_SLEEP);
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if (whichfork == XFS_DATA_FORK)
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ip->i_itemp->ili_extents_buf = ext_buffer;
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else
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ip->i_itemp->ili_aextents_buf = ext_buffer;
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vecp->i_addr = ext_buffer;
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vecp->i_len = xfs_iextents_copy(ip, ext_buffer, whichfork);
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vecp->i_type = type;
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}
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/*
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* This is called to fill in the vector of log iovecs for the
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* given inode log item. It fills the first item with an inode
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* log format structure, the second with the on-disk inode structure,
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* and a possible third and/or fourth with the inode data/extents/b-tree
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* root and inode attributes data/extents/b-tree root.
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*/
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STATIC void
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xfs_inode_item_format(
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struct xfs_log_item *lip,
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struct xfs_log_iovec *vecp)
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{
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struct xfs_inode_log_item *iip = INODE_ITEM(lip);
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struct xfs_inode *ip = iip->ili_inode;
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uint nvecs;
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size_t data_bytes;
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xfs_mount_t *mp;
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vecp->i_addr = &iip->ili_format;
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vecp->i_len = sizeof(xfs_inode_log_format_t);
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vecp->i_type = XLOG_REG_TYPE_IFORMAT;
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vecp++;
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nvecs = 1;
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/*
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* Clear i_update_core if the timestamps (or any other
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* non-transactional modification) need flushing/logging
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* and we're about to log them with the rest of the core.
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*
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* This is the same logic as xfs_iflush() but this code can't
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* run at the same time as xfs_iflush because we're in commit
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* processing here and so we have the inode lock held in
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* exclusive mode. Although it doesn't really matter
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* for the timestamps if both routines were to grab the
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* timestamps or not. That would be ok.
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*
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* We clear i_update_core before copying out the data.
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* This is for coordination with our timestamp updates
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* that don't hold the inode lock. They will always
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* update the timestamps BEFORE setting i_update_core,
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* so if we clear i_update_core after they set it we
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* are guaranteed to see their updates to the timestamps
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* either here. Likewise, if they set it after we clear it
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* here, we'll see it either on the next commit of this
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* inode or the next time the inode gets flushed via
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* xfs_iflush(). This depends on strongly ordered memory
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* semantics, but we have that. We use the SYNCHRONIZE
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* macro to make sure that the compiler does not reorder
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* the i_update_core access below the data copy below.
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*/
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if (ip->i_update_core) {
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ip->i_update_core = 0;
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SYNCHRONIZE();
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}
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/*
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* Make sure to get the latest timestamps from the Linux inode.
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*/
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xfs_synchronize_times(ip);
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vecp->i_addr = &ip->i_d;
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vecp->i_len = sizeof(struct xfs_icdinode);
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vecp->i_type = XLOG_REG_TYPE_ICORE;
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vecp++;
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nvecs++;
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iip->ili_format.ilf_fields |= XFS_ILOG_CORE;
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/*
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* If this is really an old format inode, then we need to
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* log it as such. This means that we have to copy the link
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* count from the new field to the old. We don't have to worry
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* about the new fields, because nothing trusts them as long as
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* the old inode version number is there. If the superblock already
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* has a new version number, then we don't bother converting back.
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*/
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mp = ip->i_mount;
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ASSERT(ip->i_d.di_version == 1 || xfs_sb_version_hasnlink(&mp->m_sb));
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if (ip->i_d.di_version == 1) {
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if (!xfs_sb_version_hasnlink(&mp->m_sb)) {
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/*
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* Convert it back.
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*/
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ASSERT(ip->i_d.di_nlink <= XFS_MAXLINK_1);
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ip->i_d.di_onlink = ip->i_d.di_nlink;
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} else {
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/*
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* The superblock version has already been bumped,
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* so just make the conversion to the new inode
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* format permanent.
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*/
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ip->i_d.di_version = 2;
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ip->i_d.di_onlink = 0;
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memset(&(ip->i_d.di_pad[0]), 0, sizeof(ip->i_d.di_pad));
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}
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}
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switch (ip->i_d.di_format) {
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case XFS_DINODE_FMT_EXTENTS:
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ASSERT(!(iip->ili_format.ilf_fields &
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(XFS_ILOG_DDATA | XFS_ILOG_DBROOT |
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XFS_ILOG_DEV | XFS_ILOG_UUID)));
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if (iip->ili_format.ilf_fields & XFS_ILOG_DEXT) {
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ASSERT(ip->i_df.if_bytes > 0);
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ASSERT(ip->i_df.if_u1.if_extents != NULL);
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ASSERT(ip->i_d.di_nextents > 0);
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ASSERT(iip->ili_extents_buf == NULL);
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ASSERT((ip->i_df.if_bytes /
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(uint)sizeof(xfs_bmbt_rec_t)) > 0);
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#ifdef XFS_NATIVE_HOST
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if (ip->i_d.di_nextents == ip->i_df.if_bytes /
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(uint)sizeof(xfs_bmbt_rec_t)) {
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/*
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* There are no delayed allocation
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* extents, so just point to the
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* real extents array.
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*/
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vecp->i_addr = ip->i_df.if_u1.if_extents;
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vecp->i_len = ip->i_df.if_bytes;
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vecp->i_type = XLOG_REG_TYPE_IEXT;
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} else
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#endif
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{
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xfs_inode_item_format_extents(ip, vecp,
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XFS_DATA_FORK, XLOG_REG_TYPE_IEXT);
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}
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ASSERT(vecp->i_len <= ip->i_df.if_bytes);
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iip->ili_format.ilf_dsize = vecp->i_len;
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vecp++;
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nvecs++;
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}
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break;
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case XFS_DINODE_FMT_BTREE:
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ASSERT(!(iip->ili_format.ilf_fields &
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(XFS_ILOG_DDATA | XFS_ILOG_DEXT |
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XFS_ILOG_DEV | XFS_ILOG_UUID)));
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if (iip->ili_format.ilf_fields & XFS_ILOG_DBROOT) {
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ASSERT(ip->i_df.if_broot_bytes > 0);
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ASSERT(ip->i_df.if_broot != NULL);
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vecp->i_addr = ip->i_df.if_broot;
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vecp->i_len = ip->i_df.if_broot_bytes;
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vecp->i_type = XLOG_REG_TYPE_IBROOT;
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vecp++;
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nvecs++;
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iip->ili_format.ilf_dsize = ip->i_df.if_broot_bytes;
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}
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break;
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case XFS_DINODE_FMT_LOCAL:
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ASSERT(!(iip->ili_format.ilf_fields &
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(XFS_ILOG_DBROOT | XFS_ILOG_DEXT |
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XFS_ILOG_DEV | XFS_ILOG_UUID)));
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if (iip->ili_format.ilf_fields & XFS_ILOG_DDATA) {
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ASSERT(ip->i_df.if_bytes > 0);
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ASSERT(ip->i_df.if_u1.if_data != NULL);
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ASSERT(ip->i_d.di_size > 0);
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vecp->i_addr = ip->i_df.if_u1.if_data;
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/*
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* Round i_bytes up to a word boundary.
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* The underlying memory is guaranteed to
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* to be there by xfs_idata_realloc().
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*/
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data_bytes = roundup(ip->i_df.if_bytes, 4);
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ASSERT((ip->i_df.if_real_bytes == 0) ||
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(ip->i_df.if_real_bytes == data_bytes));
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vecp->i_len = (int)data_bytes;
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vecp->i_type = XLOG_REG_TYPE_ILOCAL;
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vecp++;
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nvecs++;
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iip->ili_format.ilf_dsize = (unsigned)data_bytes;
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}
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break;
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case XFS_DINODE_FMT_DEV:
|
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ASSERT(!(iip->ili_format.ilf_fields &
|
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(XFS_ILOG_DBROOT | XFS_ILOG_DEXT |
|
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XFS_ILOG_DDATA | XFS_ILOG_UUID)));
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if (iip->ili_format.ilf_fields & XFS_ILOG_DEV) {
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iip->ili_format.ilf_u.ilfu_rdev =
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ip->i_df.if_u2.if_rdev;
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}
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break;
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case XFS_DINODE_FMT_UUID:
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ASSERT(!(iip->ili_format.ilf_fields &
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(XFS_ILOG_DBROOT | XFS_ILOG_DEXT |
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XFS_ILOG_DDATA | XFS_ILOG_DEV)));
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if (iip->ili_format.ilf_fields & XFS_ILOG_UUID) {
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iip->ili_format.ilf_u.ilfu_uuid =
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ip->i_df.if_u2.if_uuid;
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}
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break;
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default:
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ASSERT(0);
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break;
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}
|
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|
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/*
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* If there are no attributes associated with the file,
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* then we're done.
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* Assert that no attribute-related log flags are set.
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|
*/
|
|
if (!XFS_IFORK_Q(ip)) {
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ASSERT(nvecs == lip->li_desc->lid_size);
|
|
iip->ili_format.ilf_size = nvecs;
|
|
ASSERT(!(iip->ili_format.ilf_fields &
|
|
(XFS_ILOG_ADATA | XFS_ILOG_ABROOT | XFS_ILOG_AEXT)));
|
|
return;
|
|
}
|
|
|
|
switch (ip->i_d.di_aformat) {
|
|
case XFS_DINODE_FMT_EXTENTS:
|
|
ASSERT(!(iip->ili_format.ilf_fields &
|
|
(XFS_ILOG_ADATA | XFS_ILOG_ABROOT)));
|
|
if (iip->ili_format.ilf_fields & XFS_ILOG_AEXT) {
|
|
#ifdef DEBUG
|
|
int nrecs = ip->i_afp->if_bytes /
|
|
(uint)sizeof(xfs_bmbt_rec_t);
|
|
ASSERT(nrecs > 0);
|
|
ASSERT(nrecs == ip->i_d.di_anextents);
|
|
ASSERT(ip->i_afp->if_bytes > 0);
|
|
ASSERT(ip->i_afp->if_u1.if_extents != NULL);
|
|
ASSERT(ip->i_d.di_anextents > 0);
|
|
#endif
|
|
#ifdef XFS_NATIVE_HOST
|
|
/*
|
|
* There are not delayed allocation extents
|
|
* for attributes, so just point at the array.
|
|
*/
|
|
vecp->i_addr = ip->i_afp->if_u1.if_extents;
|
|
vecp->i_len = ip->i_afp->if_bytes;
|
|
vecp->i_type = XLOG_REG_TYPE_IATTR_EXT;
|
|
#else
|
|
ASSERT(iip->ili_aextents_buf == NULL);
|
|
xfs_inode_item_format_extents(ip, vecp,
|
|
XFS_ATTR_FORK, XLOG_REG_TYPE_IATTR_EXT);
|
|
#endif
|
|
iip->ili_format.ilf_asize = vecp->i_len;
|
|
vecp++;
|
|
nvecs++;
|
|
}
|
|
break;
|
|
|
|
case XFS_DINODE_FMT_BTREE:
|
|
ASSERT(!(iip->ili_format.ilf_fields &
|
|
(XFS_ILOG_ADATA | XFS_ILOG_AEXT)));
|
|
if (iip->ili_format.ilf_fields & XFS_ILOG_ABROOT) {
|
|
ASSERT(ip->i_afp->if_broot_bytes > 0);
|
|
ASSERT(ip->i_afp->if_broot != NULL);
|
|
vecp->i_addr = ip->i_afp->if_broot;
|
|
vecp->i_len = ip->i_afp->if_broot_bytes;
|
|
vecp->i_type = XLOG_REG_TYPE_IATTR_BROOT;
|
|
vecp++;
|
|
nvecs++;
|
|
iip->ili_format.ilf_asize = ip->i_afp->if_broot_bytes;
|
|
}
|
|
break;
|
|
|
|
case XFS_DINODE_FMT_LOCAL:
|
|
ASSERT(!(iip->ili_format.ilf_fields &
|
|
(XFS_ILOG_ABROOT | XFS_ILOG_AEXT)));
|
|
if (iip->ili_format.ilf_fields & XFS_ILOG_ADATA) {
|
|
ASSERT(ip->i_afp->if_bytes > 0);
|
|
ASSERT(ip->i_afp->if_u1.if_data != NULL);
|
|
|
|
vecp->i_addr = ip->i_afp->if_u1.if_data;
|
|
/*
|
|
* Round i_bytes up to a word boundary.
|
|
* The underlying memory is guaranteed to
|
|
* to be there by xfs_idata_realloc().
|
|
*/
|
|
data_bytes = roundup(ip->i_afp->if_bytes, 4);
|
|
ASSERT((ip->i_afp->if_real_bytes == 0) ||
|
|
(ip->i_afp->if_real_bytes == data_bytes));
|
|
vecp->i_len = (int)data_bytes;
|
|
vecp->i_type = XLOG_REG_TYPE_IATTR_LOCAL;
|
|
vecp++;
|
|
nvecs++;
|
|
iip->ili_format.ilf_asize = (unsigned)data_bytes;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
ASSERT(0);
|
|
break;
|
|
}
|
|
|
|
ASSERT(nvecs == lip->li_desc->lid_size);
|
|
iip->ili_format.ilf_size = nvecs;
|
|
}
|
|
|
|
|
|
/*
|
|
* This is called to pin the inode associated with the inode log
|
|
* item in memory so it cannot be written out.
|
|
*/
|
|
STATIC void
|
|
xfs_inode_item_pin(
|
|
struct xfs_log_item *lip)
|
|
{
|
|
struct xfs_inode *ip = INODE_ITEM(lip)->ili_inode;
|
|
|
|
ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
|
|
|
|
trace_xfs_inode_pin(ip, _RET_IP_);
|
|
atomic_inc(&ip->i_pincount);
|
|
}
|
|
|
|
|
|
/*
|
|
* This is called to unpin the inode associated with the inode log
|
|
* item which was previously pinned with a call to xfs_inode_item_pin().
|
|
*
|
|
* Also wake up anyone in xfs_iunpin_wait() if the count goes to 0.
|
|
*/
|
|
STATIC void
|
|
xfs_inode_item_unpin(
|
|
struct xfs_log_item *lip,
|
|
int remove)
|
|
{
|
|
struct xfs_inode *ip = INODE_ITEM(lip)->ili_inode;
|
|
|
|
trace_xfs_inode_unpin(ip, _RET_IP_);
|
|
ASSERT(atomic_read(&ip->i_pincount) > 0);
|
|
if (atomic_dec_and_test(&ip->i_pincount))
|
|
wake_up(&ip->i_ipin_wait);
|
|
}
|
|
|
|
/*
|
|
* This is called to attempt to lock the inode associated with this
|
|
* inode log item, in preparation for the push routine which does the actual
|
|
* iflush. Don't sleep on the inode lock or the flush lock.
|
|
*
|
|
* If the flush lock is already held, indicating that the inode has
|
|
* been or is in the process of being flushed, then (ideally) we'd like to
|
|
* see if the inode's buffer is still incore, and if so give it a nudge.
|
|
* We delay doing so until the pushbuf routine, though, to avoid holding
|
|
* the AIL lock across a call to the blackhole which is the buffer cache.
|
|
* Also we don't want to sleep in any device strategy routines, which can happen
|
|
* if we do the subsequent bawrite in here.
|
|
*/
|
|
STATIC uint
|
|
xfs_inode_item_trylock(
|
|
struct xfs_log_item *lip)
|
|
{
|
|
struct xfs_inode_log_item *iip = INODE_ITEM(lip);
|
|
struct xfs_inode *ip = iip->ili_inode;
|
|
|
|
if (xfs_ipincount(ip) > 0)
|
|
return XFS_ITEM_PINNED;
|
|
|
|
if (!xfs_ilock_nowait(ip, XFS_ILOCK_SHARED))
|
|
return XFS_ITEM_LOCKED;
|
|
|
|
if (!xfs_iflock_nowait(ip)) {
|
|
/*
|
|
* inode has already been flushed to the backing buffer,
|
|
* leave it locked in shared mode, pushbuf routine will
|
|
* unlock it.
|
|
*/
|
|
return XFS_ITEM_PUSHBUF;
|
|
}
|
|
|
|
/* Stale items should force out the iclog */
|
|
if (ip->i_flags & XFS_ISTALE) {
|
|
xfs_ifunlock(ip);
|
|
/*
|
|
* we hold the AIL lock - notify the unlock routine of this
|
|
* so it doesn't try to get the lock again.
|
|
*/
|
|
xfs_iunlock(ip, XFS_ILOCK_SHARED|XFS_IUNLOCK_NONOTIFY);
|
|
return XFS_ITEM_PINNED;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
if (!XFS_FORCED_SHUTDOWN(ip->i_mount)) {
|
|
ASSERT(iip->ili_format.ilf_fields != 0);
|
|
ASSERT(iip->ili_logged == 0);
|
|
ASSERT(lip->li_flags & XFS_LI_IN_AIL);
|
|
}
|
|
#endif
|
|
return XFS_ITEM_SUCCESS;
|
|
}
|
|
|
|
/*
|
|
* Unlock the inode associated with the inode log item.
|
|
* Clear the fields of the inode and inode log item that
|
|
* are specific to the current transaction. If the
|
|
* hold flags is set, do not unlock the inode.
|
|
*/
|
|
STATIC void
|
|
xfs_inode_item_unlock(
|
|
struct xfs_log_item *lip)
|
|
{
|
|
struct xfs_inode_log_item *iip = INODE_ITEM(lip);
|
|
struct xfs_inode *ip = iip->ili_inode;
|
|
unsigned short lock_flags;
|
|
|
|
ASSERT(ip->i_itemp != NULL);
|
|
ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
|
|
|
|
/*
|
|
* If the inode needed a separate buffer with which to log
|
|
* its extents, then free it now.
|
|
*/
|
|
if (iip->ili_extents_buf != NULL) {
|
|
ASSERT(ip->i_d.di_format == XFS_DINODE_FMT_EXTENTS);
|
|
ASSERT(ip->i_d.di_nextents > 0);
|
|
ASSERT(iip->ili_format.ilf_fields & XFS_ILOG_DEXT);
|
|
ASSERT(ip->i_df.if_bytes > 0);
|
|
kmem_free(iip->ili_extents_buf);
|
|
iip->ili_extents_buf = NULL;
|
|
}
|
|
if (iip->ili_aextents_buf != NULL) {
|
|
ASSERT(ip->i_d.di_aformat == XFS_DINODE_FMT_EXTENTS);
|
|
ASSERT(ip->i_d.di_anextents > 0);
|
|
ASSERT(iip->ili_format.ilf_fields & XFS_ILOG_AEXT);
|
|
ASSERT(ip->i_afp->if_bytes > 0);
|
|
kmem_free(iip->ili_aextents_buf);
|
|
iip->ili_aextents_buf = NULL;
|
|
}
|
|
|
|
lock_flags = iip->ili_lock_flags;
|
|
iip->ili_lock_flags = 0;
|
|
if (lock_flags)
|
|
xfs_iunlock(ip, lock_flags);
|
|
}
|
|
|
|
/*
|
|
* This is called to find out where the oldest active copy of the inode log
|
|
* item in the on disk log resides now that the last log write of it completed
|
|
* at the given lsn. Since we always re-log all dirty data in an inode, the
|
|
* latest copy in the on disk log is the only one that matters. Therefore,
|
|
* simply return the given lsn.
|
|
*
|
|
* If the inode has been marked stale because the cluster is being freed, we
|
|
* don't want to (re-)insert this inode into the AIL. There is a race condition
|
|
* where the cluster buffer may be unpinned before the inode is inserted into
|
|
* the AIL during transaction committed processing. If the buffer is unpinned
|
|
* before the inode item has been committed and inserted, then it is possible
|
|
* for the buffer to be written and IO completes before the inode is inserted
|
|
* into the AIL. In that case, we'd be inserting a clean, stale inode into the
|
|
* AIL which will never get removed. It will, however, get reclaimed which
|
|
* triggers an assert in xfs_inode_free() complaining about freein an inode
|
|
* still in the AIL.
|
|
*
|
|
* To avoid this, just unpin the inode directly and return a LSN of -1 so the
|
|
* transaction committed code knows that it does not need to do any further
|
|
* processing on the item.
|
|
*/
|
|
STATIC xfs_lsn_t
|
|
xfs_inode_item_committed(
|
|
struct xfs_log_item *lip,
|
|
xfs_lsn_t lsn)
|
|
{
|
|
struct xfs_inode_log_item *iip = INODE_ITEM(lip);
|
|
struct xfs_inode *ip = iip->ili_inode;
|
|
|
|
if (xfs_iflags_test(ip, XFS_ISTALE)) {
|
|
xfs_inode_item_unpin(lip, 0);
|
|
return -1;
|
|
}
|
|
return lsn;
|
|
}
|
|
|
|
/*
|
|
* This gets called by xfs_trans_push_ail(), when IOP_TRYLOCK
|
|
* failed to get the inode flush lock but did get the inode locked SHARED.
|
|
* Here we're trying to see if the inode buffer is incore, and if so whether it's
|
|
* marked delayed write. If that's the case, we'll promote it and that will
|
|
* allow the caller to write the buffer by triggering the xfsbufd to run.
|
|
*/
|
|
STATIC bool
|
|
xfs_inode_item_pushbuf(
|
|
struct xfs_log_item *lip)
|
|
{
|
|
struct xfs_inode_log_item *iip = INODE_ITEM(lip);
|
|
struct xfs_inode *ip = iip->ili_inode;
|
|
struct xfs_buf *bp;
|
|
bool ret = true;
|
|
|
|
ASSERT(xfs_isilocked(ip, XFS_ILOCK_SHARED));
|
|
|
|
/*
|
|
* If a flush is not in progress anymore, chances are that the
|
|
* inode was taken off the AIL. So, just get out.
|
|
*/
|
|
if (completion_done(&ip->i_flush) ||
|
|
!(lip->li_flags & XFS_LI_IN_AIL)) {
|
|
xfs_iunlock(ip, XFS_ILOCK_SHARED);
|
|
return true;
|
|
}
|
|
|
|
bp = xfs_incore(ip->i_mount->m_ddev_targp, iip->ili_format.ilf_blkno,
|
|
iip->ili_format.ilf_len, XBF_TRYLOCK);
|
|
|
|
xfs_iunlock(ip, XFS_ILOCK_SHARED);
|
|
if (!bp)
|
|
return true;
|
|
if (XFS_BUF_ISDELAYWRITE(bp))
|
|
xfs_buf_delwri_promote(bp);
|
|
if (xfs_buf_ispinned(bp))
|
|
ret = false;
|
|
xfs_buf_relse(bp);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* This is called to asynchronously write the inode associated with this
|
|
* inode log item out to disk. The inode will already have been locked by
|
|
* a successful call to xfs_inode_item_trylock().
|
|
*/
|
|
STATIC void
|
|
xfs_inode_item_push(
|
|
struct xfs_log_item *lip)
|
|
{
|
|
struct xfs_inode_log_item *iip = INODE_ITEM(lip);
|
|
struct xfs_inode *ip = iip->ili_inode;
|
|
|
|
ASSERT(xfs_isilocked(ip, XFS_ILOCK_SHARED));
|
|
ASSERT(!completion_done(&ip->i_flush));
|
|
|
|
/*
|
|
* Since we were able to lock the inode's flush lock and
|
|
* we found it on the AIL, the inode must be dirty. This
|
|
* is because the inode is removed from the AIL while still
|
|
* holding the flush lock in xfs_iflush_done(). Thus, if
|
|
* we found it in the AIL and were able to obtain the flush
|
|
* lock without sleeping, then there must not have been
|
|
* anyone in the process of flushing the inode.
|
|
*/
|
|
ASSERT(XFS_FORCED_SHUTDOWN(ip->i_mount) ||
|
|
iip->ili_format.ilf_fields != 0);
|
|
|
|
/*
|
|
* Push the inode to it's backing buffer. This will not remove the
|
|
* inode from the AIL - a further push will be required to trigger a
|
|
* buffer push. However, this allows all the dirty inodes to be pushed
|
|
* to the buffer before it is pushed to disk. The buffer IO completion
|
|
* will pull the inode from the AIL, mark it clean and unlock the flush
|
|
* lock.
|
|
*/
|
|
(void) xfs_iflush(ip, SYNC_TRYLOCK);
|
|
xfs_iunlock(ip, XFS_ILOCK_SHARED);
|
|
}
|
|
|
|
/*
|
|
* XXX rcc - this one really has to do something. Probably needs
|
|
* to stamp in a new field in the incore inode.
|
|
*/
|
|
STATIC void
|
|
xfs_inode_item_committing(
|
|
struct xfs_log_item *lip,
|
|
xfs_lsn_t lsn)
|
|
{
|
|
INODE_ITEM(lip)->ili_last_lsn = lsn;
|
|
}
|
|
|
|
/*
|
|
* This is the ops vector shared by all buf log items.
|
|
*/
|
|
static const struct xfs_item_ops xfs_inode_item_ops = {
|
|
.iop_size = xfs_inode_item_size,
|
|
.iop_format = xfs_inode_item_format,
|
|
.iop_pin = xfs_inode_item_pin,
|
|
.iop_unpin = xfs_inode_item_unpin,
|
|
.iop_trylock = xfs_inode_item_trylock,
|
|
.iop_unlock = xfs_inode_item_unlock,
|
|
.iop_committed = xfs_inode_item_committed,
|
|
.iop_push = xfs_inode_item_push,
|
|
.iop_pushbuf = xfs_inode_item_pushbuf,
|
|
.iop_committing = xfs_inode_item_committing
|
|
};
|
|
|
|
|
|
/*
|
|
* Initialize the inode log item for a newly allocated (in-core) inode.
|
|
*/
|
|
void
|
|
xfs_inode_item_init(
|
|
struct xfs_inode *ip,
|
|
struct xfs_mount *mp)
|
|
{
|
|
struct xfs_inode_log_item *iip;
|
|
|
|
ASSERT(ip->i_itemp == NULL);
|
|
iip = ip->i_itemp = kmem_zone_zalloc(xfs_ili_zone, KM_SLEEP);
|
|
|
|
iip->ili_inode = ip;
|
|
xfs_log_item_init(mp, &iip->ili_item, XFS_LI_INODE,
|
|
&xfs_inode_item_ops);
|
|
iip->ili_format.ilf_type = XFS_LI_INODE;
|
|
iip->ili_format.ilf_ino = ip->i_ino;
|
|
iip->ili_format.ilf_blkno = ip->i_imap.im_blkno;
|
|
iip->ili_format.ilf_len = ip->i_imap.im_len;
|
|
iip->ili_format.ilf_boffset = ip->i_imap.im_boffset;
|
|
}
|
|
|
|
/*
|
|
* Free the inode log item and any memory hanging off of it.
|
|
*/
|
|
void
|
|
xfs_inode_item_destroy(
|
|
xfs_inode_t *ip)
|
|
{
|
|
#ifdef XFS_TRANS_DEBUG
|
|
if (ip->i_itemp->ili_root_size != 0) {
|
|
kmem_free(ip->i_itemp->ili_orig_root);
|
|
}
|
|
#endif
|
|
kmem_zone_free(xfs_ili_zone, ip->i_itemp);
|
|
}
|
|
|
|
|
|
/*
|
|
* This is the inode flushing I/O completion routine. It is called
|
|
* from interrupt level when the buffer containing the inode is
|
|
* flushed to disk. It is responsible for removing the inode item
|
|
* from the AIL if it has not been re-logged, and unlocking the inode's
|
|
* flush lock.
|
|
*
|
|
* To reduce AIL lock traffic as much as possible, we scan the buffer log item
|
|
* list for other inodes that will run this function. We remove them from the
|
|
* buffer list so we can process all the inode IO completions in one AIL lock
|
|
* traversal.
|
|
*/
|
|
void
|
|
xfs_iflush_done(
|
|
struct xfs_buf *bp,
|
|
struct xfs_log_item *lip)
|
|
{
|
|
struct xfs_inode_log_item *iip;
|
|
struct xfs_log_item *blip;
|
|
struct xfs_log_item *next;
|
|
struct xfs_log_item *prev;
|
|
struct xfs_ail *ailp = lip->li_ailp;
|
|
int need_ail = 0;
|
|
|
|
/*
|
|
* Scan the buffer IO completions for other inodes being completed and
|
|
* attach them to the current inode log item.
|
|
*/
|
|
blip = bp->b_fspriv;
|
|
prev = NULL;
|
|
while (blip != NULL) {
|
|
if (lip->li_cb != xfs_iflush_done) {
|
|
prev = blip;
|
|
blip = blip->li_bio_list;
|
|
continue;
|
|
}
|
|
|
|
/* remove from list */
|
|
next = blip->li_bio_list;
|
|
if (!prev) {
|
|
bp->b_fspriv = next;
|
|
} else {
|
|
prev->li_bio_list = next;
|
|
}
|
|
|
|
/* add to current list */
|
|
blip->li_bio_list = lip->li_bio_list;
|
|
lip->li_bio_list = blip;
|
|
|
|
/*
|
|
* while we have the item, do the unlocked check for needing
|
|
* the AIL lock.
|
|
*/
|
|
iip = INODE_ITEM(blip);
|
|
if (iip->ili_logged && blip->li_lsn == iip->ili_flush_lsn)
|
|
need_ail++;
|
|
|
|
blip = next;
|
|
}
|
|
|
|
/* make sure we capture the state of the initial inode. */
|
|
iip = INODE_ITEM(lip);
|
|
if (iip->ili_logged && lip->li_lsn == iip->ili_flush_lsn)
|
|
need_ail++;
|
|
|
|
/*
|
|
* We only want to pull the item from the AIL if it is
|
|
* actually there and its location in the log has not
|
|
* changed since we started the flush. Thus, we only bother
|
|
* if the ili_logged flag is set and the inode's lsn has not
|
|
* changed. First we check the lsn outside
|
|
* the lock since it's cheaper, and then we recheck while
|
|
* holding the lock before removing the inode from the AIL.
|
|
*/
|
|
if (need_ail) {
|
|
struct xfs_log_item *log_items[need_ail];
|
|
int i = 0;
|
|
spin_lock(&ailp->xa_lock);
|
|
for (blip = lip; blip; blip = blip->li_bio_list) {
|
|
iip = INODE_ITEM(blip);
|
|
if (iip->ili_logged &&
|
|
blip->li_lsn == iip->ili_flush_lsn) {
|
|
log_items[i++] = blip;
|
|
}
|
|
ASSERT(i <= need_ail);
|
|
}
|
|
/* xfs_trans_ail_delete_bulk() drops the AIL lock. */
|
|
xfs_trans_ail_delete_bulk(ailp, log_items, i);
|
|
}
|
|
|
|
|
|
/*
|
|
* clean up and unlock the flush lock now we are done. We can clear the
|
|
* ili_last_fields bits now that we know that the data corresponding to
|
|
* them is safely on disk.
|
|
*/
|
|
for (blip = lip; blip; blip = next) {
|
|
next = blip->li_bio_list;
|
|
blip->li_bio_list = NULL;
|
|
|
|
iip = INODE_ITEM(blip);
|
|
iip->ili_logged = 0;
|
|
iip->ili_last_fields = 0;
|
|
xfs_ifunlock(iip->ili_inode);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* This is the inode flushing abort routine. It is called
|
|
* from xfs_iflush when the filesystem is shutting down to clean
|
|
* up the inode state.
|
|
* It is responsible for removing the inode item
|
|
* from the AIL if it has not been re-logged, and unlocking the inode's
|
|
* flush lock.
|
|
*/
|
|
void
|
|
xfs_iflush_abort(
|
|
xfs_inode_t *ip)
|
|
{
|
|
xfs_inode_log_item_t *iip = ip->i_itemp;
|
|
|
|
if (iip) {
|
|
struct xfs_ail *ailp = iip->ili_item.li_ailp;
|
|
if (iip->ili_item.li_flags & XFS_LI_IN_AIL) {
|
|
spin_lock(&ailp->xa_lock);
|
|
if (iip->ili_item.li_flags & XFS_LI_IN_AIL) {
|
|
/* xfs_trans_ail_delete() drops the AIL lock. */
|
|
xfs_trans_ail_delete(ailp, (xfs_log_item_t *)iip);
|
|
} else
|
|
spin_unlock(&ailp->xa_lock);
|
|
}
|
|
iip->ili_logged = 0;
|
|
/*
|
|
* Clear the ili_last_fields bits now that we know that the
|
|
* data corresponding to them is safely on disk.
|
|
*/
|
|
iip->ili_last_fields = 0;
|
|
/*
|
|
* Clear the inode logging fields so no more flushes are
|
|
* attempted.
|
|
*/
|
|
iip->ili_format.ilf_fields = 0;
|
|
}
|
|
/*
|
|
* Release the inode's flush lock since we're done with it.
|
|
*/
|
|
xfs_ifunlock(ip);
|
|
}
|
|
|
|
void
|
|
xfs_istale_done(
|
|
struct xfs_buf *bp,
|
|
struct xfs_log_item *lip)
|
|
{
|
|
xfs_iflush_abort(INODE_ITEM(lip)->ili_inode);
|
|
}
|
|
|
|
/*
|
|
* convert an xfs_inode_log_format struct from either 32 or 64 bit versions
|
|
* (which can have different field alignments) to the native version
|
|
*/
|
|
int
|
|
xfs_inode_item_format_convert(
|
|
xfs_log_iovec_t *buf,
|
|
xfs_inode_log_format_t *in_f)
|
|
{
|
|
if (buf->i_len == sizeof(xfs_inode_log_format_32_t)) {
|
|
xfs_inode_log_format_32_t *in_f32 = buf->i_addr;
|
|
|
|
in_f->ilf_type = in_f32->ilf_type;
|
|
in_f->ilf_size = in_f32->ilf_size;
|
|
in_f->ilf_fields = in_f32->ilf_fields;
|
|
in_f->ilf_asize = in_f32->ilf_asize;
|
|
in_f->ilf_dsize = in_f32->ilf_dsize;
|
|
in_f->ilf_ino = in_f32->ilf_ino;
|
|
/* copy biggest field of ilf_u */
|
|
memcpy(in_f->ilf_u.ilfu_uuid.__u_bits,
|
|
in_f32->ilf_u.ilfu_uuid.__u_bits,
|
|
sizeof(uuid_t));
|
|
in_f->ilf_blkno = in_f32->ilf_blkno;
|
|
in_f->ilf_len = in_f32->ilf_len;
|
|
in_f->ilf_boffset = in_f32->ilf_boffset;
|
|
return 0;
|
|
} else if (buf->i_len == sizeof(xfs_inode_log_format_64_t)){
|
|
xfs_inode_log_format_64_t *in_f64 = buf->i_addr;
|
|
|
|
in_f->ilf_type = in_f64->ilf_type;
|
|
in_f->ilf_size = in_f64->ilf_size;
|
|
in_f->ilf_fields = in_f64->ilf_fields;
|
|
in_f->ilf_asize = in_f64->ilf_asize;
|
|
in_f->ilf_dsize = in_f64->ilf_dsize;
|
|
in_f->ilf_ino = in_f64->ilf_ino;
|
|
/* copy biggest field of ilf_u */
|
|
memcpy(in_f->ilf_u.ilfu_uuid.__u_bits,
|
|
in_f64->ilf_u.ilfu_uuid.__u_bits,
|
|
sizeof(uuid_t));
|
|
in_f->ilf_blkno = in_f64->ilf_blkno;
|
|
in_f->ilf_len = in_f64->ilf_len;
|
|
in_f->ilf_boffset = in_f64->ilf_boffset;
|
|
return 0;
|
|
}
|
|
return EFSCORRUPTED;
|
|
}
|