mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-25 20:14:25 +08:00
f6c2d1fa63
pure bloat. SGI-PV: 952969 SGI-Modid: xfs-linux-melb:xfs-kern:26251a Signed-off-by: Nathan Scott <nathans@sgi.com>
309 lines
8.6 KiB
C
309 lines
8.6 KiB
C
/*
|
|
* Copyright (c) 2000,2005 Silicon Graphics, Inc.
|
|
* All Rights Reserved.
|
|
*
|
|
* 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.
|
|
*
|
|
* This program is distributed in the hope that it would 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 the Free Software Foundation,
|
|
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
#include "xfs.h"
|
|
#include "xfs_fs.h"
|
|
#include "xfs_types.h"
|
|
#include "xfs_bit.h"
|
|
#include "xfs_log.h"
|
|
#include "xfs_inum.h"
|
|
#include "xfs_trans.h"
|
|
#include "xfs_sb.h"
|
|
#include "xfs_ag.h"
|
|
#include "xfs_dir2.h"
|
|
#include "xfs_dmapi.h"
|
|
#include "xfs_mount.h"
|
|
#include "xfs_bmap_btree.h"
|
|
#include "xfs_alloc_btree.h"
|
|
#include "xfs_ialloc_btree.h"
|
|
#include "xfs_dir2_sf.h"
|
|
#include "xfs_attr_sf.h"
|
|
#include "xfs_dinode.h"
|
|
#include "xfs_inode.h"
|
|
#include "xfs_btree.h"
|
|
#include "xfs_ialloc.h"
|
|
#include "xfs_trans_priv.h"
|
|
#include "xfs_inode_item.h"
|
|
|
|
#ifdef XFS_TRANS_DEBUG
|
|
STATIC void
|
|
xfs_trans_inode_broot_debug(
|
|
xfs_inode_t *ip);
|
|
#else
|
|
#define xfs_trans_inode_broot_debug(ip)
|
|
#endif
|
|
|
|
|
|
/*
|
|
* Get and lock the inode for the caller if it is not already
|
|
* locked within the given transaction. If it is already locked
|
|
* within the transaction, just increment its lock recursion count
|
|
* and return a pointer to it.
|
|
*
|
|
* For an inode to be locked in a transaction, the inode lock, as
|
|
* opposed to the io lock, must be taken exclusively. This ensures
|
|
* that the inode can be involved in only 1 transaction at a time.
|
|
* Lock recursion is handled on the io lock, but only for lock modes
|
|
* of equal or lesser strength. That is, you can recur on the io lock
|
|
* held EXCL with a SHARED request but not vice versa. Also, if
|
|
* the inode is already a part of the transaction then you cannot
|
|
* go from not holding the io lock to having it EXCL or SHARED.
|
|
*
|
|
* Use the inode cache routine xfs_inode_incore() to find the inode
|
|
* if it is already owned by this transaction.
|
|
*
|
|
* If we don't already own the inode, use xfs_iget() to get it.
|
|
* Since the inode log item structure is embedded in the incore
|
|
* inode structure and is initialized when the inode is brought
|
|
* into memory, there is nothing to do with it here.
|
|
*
|
|
* If the given transaction pointer is NULL, just call xfs_iget().
|
|
* This simplifies code which must handle both cases.
|
|
*/
|
|
int
|
|
xfs_trans_iget(
|
|
xfs_mount_t *mp,
|
|
xfs_trans_t *tp,
|
|
xfs_ino_t ino,
|
|
uint flags,
|
|
uint lock_flags,
|
|
xfs_inode_t **ipp)
|
|
{
|
|
int error;
|
|
xfs_inode_t *ip;
|
|
xfs_inode_log_item_t *iip;
|
|
|
|
/*
|
|
* If the transaction pointer is NULL, just call the normal
|
|
* xfs_iget().
|
|
*/
|
|
if (tp == NULL)
|
|
return xfs_iget(mp, NULL, ino, flags, lock_flags, ipp, 0);
|
|
|
|
/*
|
|
* If we find the inode in core with this transaction
|
|
* pointer in its i_transp field, then we know we already
|
|
* have it locked. In this case we just increment the lock
|
|
* recursion count and return the inode to the caller.
|
|
* Assert that the inode is already locked in the mode requested
|
|
* by the caller. We cannot do lock promotions yet, so
|
|
* die if someone gets this wrong.
|
|
*/
|
|
if ((ip = xfs_inode_incore(tp->t_mountp, ino, tp)) != NULL) {
|
|
/*
|
|
* Make sure that the inode lock is held EXCL and
|
|
* that the io lock is never upgraded when the inode
|
|
* is already a part of the transaction.
|
|
*/
|
|
ASSERT(ip->i_itemp != NULL);
|
|
ASSERT(lock_flags & XFS_ILOCK_EXCL);
|
|
ASSERT(ismrlocked(&ip->i_lock, MR_UPDATE));
|
|
ASSERT((!(lock_flags & XFS_IOLOCK_EXCL)) ||
|
|
ismrlocked(&ip->i_iolock, MR_UPDATE));
|
|
ASSERT((!(lock_flags & XFS_IOLOCK_EXCL)) ||
|
|
(ip->i_itemp->ili_flags & XFS_ILI_IOLOCKED_EXCL));
|
|
ASSERT((!(lock_flags & XFS_IOLOCK_SHARED)) ||
|
|
ismrlocked(&ip->i_iolock, (MR_UPDATE | MR_ACCESS)));
|
|
ASSERT((!(lock_flags & XFS_IOLOCK_SHARED)) ||
|
|
(ip->i_itemp->ili_flags & XFS_ILI_IOLOCKED_ANY));
|
|
|
|
if (lock_flags & (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)) {
|
|
ip->i_itemp->ili_iolock_recur++;
|
|
}
|
|
if (lock_flags & XFS_ILOCK_EXCL) {
|
|
ip->i_itemp->ili_ilock_recur++;
|
|
}
|
|
*ipp = ip;
|
|
return 0;
|
|
}
|
|
|
|
ASSERT(lock_flags & XFS_ILOCK_EXCL);
|
|
error = xfs_iget(tp->t_mountp, tp, ino, flags, lock_flags, &ip, 0);
|
|
if (error) {
|
|
return error;
|
|
}
|
|
ASSERT(ip != NULL);
|
|
|
|
/*
|
|
* Get a log_item_desc to point at the new item.
|
|
*/
|
|
if (ip->i_itemp == NULL)
|
|
xfs_inode_item_init(ip, mp);
|
|
iip = ip->i_itemp;
|
|
(void) xfs_trans_add_item(tp, (xfs_log_item_t *)(iip));
|
|
|
|
xfs_trans_inode_broot_debug(ip);
|
|
|
|
/*
|
|
* If the IO lock has been acquired, mark that in
|
|
* the inode log item so we'll know to unlock it
|
|
* when the transaction commits.
|
|
*/
|
|
ASSERT(iip->ili_flags == 0);
|
|
if (lock_flags & XFS_IOLOCK_EXCL) {
|
|
iip->ili_flags |= XFS_ILI_IOLOCKED_EXCL;
|
|
} else if (lock_flags & XFS_IOLOCK_SHARED) {
|
|
iip->ili_flags |= XFS_ILI_IOLOCKED_SHARED;
|
|
}
|
|
|
|
/*
|
|
* Initialize i_transp so we can find it with xfs_inode_incore()
|
|
* above.
|
|
*/
|
|
ip->i_transp = tp;
|
|
|
|
*ipp = ip;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Add the locked inode to the transaction.
|
|
* The inode must be locked, and it cannot be associated with any
|
|
* transaction. The caller must specify the locks already held
|
|
* on the inode.
|
|
*/
|
|
void
|
|
xfs_trans_ijoin(
|
|
xfs_trans_t *tp,
|
|
xfs_inode_t *ip,
|
|
uint lock_flags)
|
|
{
|
|
xfs_inode_log_item_t *iip;
|
|
|
|
ASSERT(ip->i_transp == NULL);
|
|
ASSERT(ismrlocked(&ip->i_lock, MR_UPDATE));
|
|
ASSERT(lock_flags & XFS_ILOCK_EXCL);
|
|
if (ip->i_itemp == NULL)
|
|
xfs_inode_item_init(ip, ip->i_mount);
|
|
iip = ip->i_itemp;
|
|
ASSERT(iip->ili_flags == 0);
|
|
ASSERT(iip->ili_ilock_recur == 0);
|
|
ASSERT(iip->ili_iolock_recur == 0);
|
|
|
|
/*
|
|
* Get a log_item_desc to point at the new item.
|
|
*/
|
|
(void) xfs_trans_add_item(tp, (xfs_log_item_t*)(iip));
|
|
|
|
xfs_trans_inode_broot_debug(ip);
|
|
|
|
/*
|
|
* If the IO lock is already held, mark that in the inode log item.
|
|
*/
|
|
if (lock_flags & XFS_IOLOCK_EXCL) {
|
|
iip->ili_flags |= XFS_ILI_IOLOCKED_EXCL;
|
|
} else if (lock_flags & XFS_IOLOCK_SHARED) {
|
|
iip->ili_flags |= XFS_ILI_IOLOCKED_SHARED;
|
|
}
|
|
|
|
/*
|
|
* Initialize i_transp so we can find it with xfs_inode_incore()
|
|
* in xfs_trans_iget() above.
|
|
*/
|
|
ip->i_transp = tp;
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* Mark the inode as not needing to be unlocked when the inode item's
|
|
* IOP_UNLOCK() routine is called. The inode must already be locked
|
|
* and associated with the given transaction.
|
|
*/
|
|
/*ARGSUSED*/
|
|
void
|
|
xfs_trans_ihold(
|
|
xfs_trans_t *tp,
|
|
xfs_inode_t *ip)
|
|
{
|
|
ASSERT(ip->i_transp == tp);
|
|
ASSERT(ip->i_itemp != NULL);
|
|
ASSERT(ismrlocked(&ip->i_lock, MR_UPDATE));
|
|
|
|
ip->i_itemp->ili_flags |= XFS_ILI_HOLD;
|
|
}
|
|
|
|
|
|
/*
|
|
* This is called to mark the fields indicated in fieldmask as needing
|
|
* to be logged when the transaction is committed. The inode must
|
|
* already be associated with the given transaction.
|
|
*
|
|
* The values for fieldmask are defined in xfs_inode_item.h. We always
|
|
* log all of the core inode if any of it has changed, and we always log
|
|
* all of the inline data/extents/b-tree root if any of them has changed.
|
|
*/
|
|
void
|
|
xfs_trans_log_inode(
|
|
xfs_trans_t *tp,
|
|
xfs_inode_t *ip,
|
|
uint flags)
|
|
{
|
|
xfs_log_item_desc_t *lidp;
|
|
|
|
ASSERT(ip->i_transp == tp);
|
|
ASSERT(ip->i_itemp != NULL);
|
|
ASSERT(ismrlocked(&ip->i_lock, MR_UPDATE));
|
|
|
|
lidp = xfs_trans_find_item(tp, (xfs_log_item_t*)(ip->i_itemp));
|
|
ASSERT(lidp != NULL);
|
|
|
|
tp->t_flags |= XFS_TRANS_DIRTY;
|
|
lidp->lid_flags |= XFS_LID_DIRTY;
|
|
|
|
/*
|
|
* Always OR in the bits from the ili_last_fields field.
|
|
* This is to coordinate with the xfs_iflush() and xfs_iflush_done()
|
|
* routines in the eventual clearing of the ilf_fields bits.
|
|
* See the big comment in xfs_iflush() for an explanation of
|
|
* this coordination mechanism.
|
|
*/
|
|
flags |= ip->i_itemp->ili_last_fields;
|
|
ip->i_itemp->ili_format.ilf_fields |= flags;
|
|
}
|
|
|
|
#ifdef XFS_TRANS_DEBUG
|
|
/*
|
|
* Keep track of the state of the inode btree root to make sure we
|
|
* log it properly.
|
|
*/
|
|
STATIC void
|
|
xfs_trans_inode_broot_debug(
|
|
xfs_inode_t *ip)
|
|
{
|
|
xfs_inode_log_item_t *iip;
|
|
|
|
ASSERT(ip->i_itemp != NULL);
|
|
iip = ip->i_itemp;
|
|
if (iip->ili_root_size != 0) {
|
|
ASSERT(iip->ili_orig_root != NULL);
|
|
kmem_free(iip->ili_orig_root, iip->ili_root_size);
|
|
iip->ili_root_size = 0;
|
|
iip->ili_orig_root = NULL;
|
|
}
|
|
if (ip->i_d.di_format == XFS_DINODE_FMT_BTREE) {
|
|
ASSERT((ip->i_df.if_broot != NULL) &&
|
|
(ip->i_df.if_broot_bytes > 0));
|
|
iip->ili_root_size = ip->i_df.if_broot_bytes;
|
|
iip->ili_orig_root =
|
|
(char*)kmem_alloc(iip->ili_root_size, KM_SLEEP);
|
|
memcpy(iip->ili_orig_root, (char*)(ip->i_df.if_broot),
|
|
iip->ili_root_size);
|
|
}
|
|
}
|
|
#endif
|