146 lines
3.4 KiB
C
146 lines
3.4 KiB
C
/*
|
|
* Copyright (c) 2000-2003,2005 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_vnodeops.h"
|
|
#include "xfs_bmap_btree.h"
|
|
#include "xfs_inode.h"
|
|
|
|
/*
|
|
* And this gunk is needed for xfs_mount.h"
|
|
*/
|
|
#include "xfs_log.h"
|
|
#include "xfs_trans.h"
|
|
#include "xfs_sb.h"
|
|
#include "xfs_dmapi.h"
|
|
#include "xfs_inum.h"
|
|
#include "xfs_ag.h"
|
|
#include "xfs_mount.h"
|
|
|
|
|
|
/*
|
|
* Dedicated vnode inactive/reclaim sync wait queues.
|
|
* Prime number of hash buckets since address is used as the key.
|
|
*/
|
|
#define NVSYNC 37
|
|
#define vptosync(v) (&vsync[((unsigned long)v) % NVSYNC])
|
|
static wait_queue_head_t vsync[NVSYNC];
|
|
|
|
void __init
|
|
vn_init(void)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < NVSYNC; i++)
|
|
init_waitqueue_head(&vsync[i]);
|
|
}
|
|
|
|
void
|
|
vn_iowait(
|
|
xfs_inode_t *ip)
|
|
{
|
|
wait_queue_head_t *wq = vptosync(ip);
|
|
|
|
wait_event(*wq, (atomic_read(&ip->i_iocount) == 0));
|
|
}
|
|
|
|
void
|
|
vn_iowake(
|
|
xfs_inode_t *ip)
|
|
{
|
|
if (atomic_dec_and_test(&ip->i_iocount))
|
|
wake_up(vptosync(ip));
|
|
}
|
|
|
|
/*
|
|
* Volume managers supporting multiple paths can send back ENODEV when the
|
|
* final path disappears. In this case continuing to fill the page cache
|
|
* with dirty data which cannot be written out is evil, so prevent that.
|
|
*/
|
|
void
|
|
vn_ioerror(
|
|
xfs_inode_t *ip,
|
|
int error,
|
|
char *f,
|
|
int l)
|
|
{
|
|
if (unlikely(error == -ENODEV))
|
|
xfs_do_force_shutdown(ip->i_mount, SHUTDOWN_DEVICE_REQ, f, l);
|
|
}
|
|
|
|
#ifdef XFS_INODE_TRACE
|
|
|
|
/*
|
|
* Reference count of Linux inode if present, -1 if the xfs_inode
|
|
* has no associated Linux inode.
|
|
*/
|
|
static inline int xfs_icount(struct xfs_inode *ip)
|
|
{
|
|
struct inode *inode = VFS_I(ip);
|
|
|
|
if (inode)
|
|
return atomic_read(&inode->i_count);
|
|
return -1;
|
|
}
|
|
|
|
#define KTRACE_ENTER(ip, vk, s, line, ra) \
|
|
ktrace_enter( (ip)->i_trace, \
|
|
/* 0 */ (void *)(__psint_t)(vk), \
|
|
/* 1 */ (void *)(s), \
|
|
/* 2 */ (void *)(__psint_t) line, \
|
|
/* 3 */ (void *)(__psint_t)xfs_icount(ip), \
|
|
/* 4 */ (void *)(ra), \
|
|
/* 5 */ NULL, \
|
|
/* 6 */ (void *)(__psint_t)current_cpu(), \
|
|
/* 7 */ (void *)(__psint_t)current_pid(), \
|
|
/* 8 */ (void *)__return_address, \
|
|
/* 9 */ NULL, NULL, NULL, NULL, NULL, NULL, NULL)
|
|
|
|
/*
|
|
* Vnode tracing code.
|
|
*/
|
|
void
|
|
_xfs_itrace_entry(xfs_inode_t *ip, const char *func, inst_t *ra)
|
|
{
|
|
KTRACE_ENTER(ip, INODE_KTRACE_ENTRY, func, 0, ra);
|
|
}
|
|
|
|
void
|
|
_xfs_itrace_exit(xfs_inode_t *ip, const char *func, inst_t *ra)
|
|
{
|
|
KTRACE_ENTER(ip, INODE_KTRACE_EXIT, func, 0, ra);
|
|
}
|
|
|
|
void
|
|
xfs_itrace_hold(xfs_inode_t *ip, char *file, int line, inst_t *ra)
|
|
{
|
|
KTRACE_ENTER(ip, INODE_KTRACE_HOLD, file, line, ra);
|
|
}
|
|
|
|
void
|
|
_xfs_itrace_ref(xfs_inode_t *ip, char *file, int line, inst_t *ra)
|
|
{
|
|
KTRACE_ENTER(ip, INODE_KTRACE_REF, file, line, ra);
|
|
}
|
|
|
|
void
|
|
xfs_itrace_rele(xfs_inode_t *ip, char *file, int line, inst_t *ra)
|
|
{
|
|
KTRACE_ENTER(ip, INODE_KTRACE_RELE, file, line, ra);
|
|
}
|
|
#endif /* XFS_INODE_TRACE */
|