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/*
* Copyright (c) 2000-2003 Silicon Graphics, Inc. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 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.
*
* Further, this software is distributed without any warranty that it is
* free of the rightful claim of any third person regarding infringement
* or the like. Any license provided herein, whether implied or
* otherwise, applies only to this software file. Patent licenses, if
* any, provided herein do not apply to combinations of this program with
* other software, or any other product whatsoever.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write the Free Software Foundation, Inc., 59
* Temple Place - Suite 330, Boston MA 02111-1307, USA.
*
* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
* Mountain View, CA 94043, or:
*
* http://www.sgi.com
*
* For further information regarding this notice, see:
*
* http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
*/
#include "xfs.h"
#include "xfs_macros.h"
#include "xfs_types.h"
#include "xfs_inum.h"
#include "xfs_log.h"
#include "xfs_trans.h"
#include "xfs_trans_priv.h"
#include "xfs_sb.h"
#include "xfs_ag.h"
#include "xfs_dir.h"
#include "xfs_dir2.h"
#include "xfs_dmapi.h"
#include "xfs_mount.h"
#include "xfs_alloc_btree.h"
#include "xfs_bmap_btree.h"
#include "xfs_ialloc_btree.h"
#include "xfs_btree.h"
#include "xfs_imap.h"
#include "xfs_alloc.h"
#include "xfs_ialloc.h"
#include "xfs_attr_sf.h"
#include "xfs_dir_sf.h"
#include "xfs_dir2_sf.h"
#include "xfs_dinode.h"
#include "xfs_inode_item.h"
#include "xfs_inode.h"
void
vn_init(void)
{
}
struct xfs_vnode *
vn_initialize(
xfs_vnode_t *vp)
{
XFS_STATS_INC(vn_active);
XFS_STATS_INC(vn_alloc);
/* Initialize the first behavior and the behavior chain head. */
vn_bhv_head_init(VN_BHV_HEAD(vp), "vnode");
#ifdef CONFIG_XFS_VNODE_TRACING
vp->v_trace = ktrace_alloc(VNODE_TRACE_SIZE, KM_SLEEP);
#endif /* CONFIG_XFS_VNODE_TRACING */
vn_trace_exit(vp, "vn_initialize", (inst_t *)__return_address);
return vp;
}
/*
* Get a reference on a vnode. Need to drop vnode reference
* to accomodate for vhold by VMAP regardless of whether or
* not we were able to successfully grab the vnode.
*/
xfs_vnode_t *
vn_get(
struct xfs_vnode *xfs_vp,
vmap_t *vmap)
{
struct vnode *vp;
int error;
XFS_STATS_INC(vn_get);
vp = vmap->v_vp;
error = vget(vp, 0, curthread);
if (error) {
vdrop(vp);
return (NULL);
}
vdrop(vp);
if (vp->v_data != xfs_vp) {
vput(vp);
return (NULL);
}
vn_trace_exit(vp, "vn_get", (inst_t *)__return_address);
return xfs_vp;
}
/*
* purge a vnode from the cache
* At this point the vnode is guaranteed to have no references (vn_count == 0)
* The caller has to make sure that there are no ways someone could
* get a handle (via vn_get) on the vnode (usually done via a mount/vfs lock).
*/
void
vn_purge(
struct xfs_vnode *xfs_vp,
vmap_t *vmap)
{
struct vnode *vp;
vn_trace_entry(vp, "vn_purge", (inst_t *)__return_address);
vp = vmap->v_vp;
vn_lock(vp, LK_EXCLUSIVE, curthread);
vgone(vp);
VOP_UNLOCK(vp, 0, curthread);
vdrop(vp);
}
/*
* Finish the removal of a vnode.
*/
void
vn_remove(
struct xfs_vnode *vp)
{
vmap_t vmap;
/* Make sure we don't do this to the same vnode twice */
if (!(vp->v_fbhv))
return;
XFS_STATS_INC(vn_remove);
vn_trace_exit(vp, "vn_remove", (inst_t *)__return_address);
/*
* After the following purge the vnode
* will no longer exist.
*/
VMAP(vp, vmap);
vn_purge(vp, &vmap);
}
#ifdef CONFIG_XFS_VNODE_TRACING
#define KTRACE_ENTER(vp, vk, s, line, ra) \
ktrace_enter( (vp)->v_trace, \
/* 0 */ (void *)(__psint_t)(vk), \
/* 1 */ (void *)(s), \
/* 2 */ (void *)(__psint_t) line, \
/* 3 */ (void *)(vn_count(vp)), \
/* 4 */ (void *)(ra), \
/* 5 */ (void *)(__psunsigned_t)(vp)->v_flag, \
/* 6 */ (void *)(__psint_t)smp_processor_id(), \
/* 7 */ (void *)(__psint_t)(current->pid), \
/* 8 */ (void *)__return_address, \
/* 9 */ 0, 0, 0, 0, 0, 0, 0)
/*
* Vnode tracing code.
*/
void
vn_trace_entry(xfs_vnode_t *vp, char *func, inst_t *ra)
{
KTRACE_ENTER(vp, VNODE_KTRACE_ENTRY, func, 0, ra);
}
void
vn_trace_exit(xfs_vnode_t *vp, char *func, inst_t *ra)
{
KTRACE_ENTER(vp, VNODE_KTRACE_EXIT, func, 0, ra);
}
void
vn_trace_hold(xfs_vnode_t *vp, char *file, int line, inst_t *ra)
{
KTRACE_ENTER(vp, VNODE_KTRACE_HOLD, file, line, ra);
}
void
vn_trace_ref(xfs_vnode_t *vp, char *file, int line, inst_t *ra)
{
KTRACE_ENTER(vp, VNODE_KTRACE_REF, file, line, ra);
}
void
vn_trace_rele(xfs_vnode_t *vp, char *file, int line, inst_t *ra)
{
KTRACE_ENTER(vp, VNODE_KTRACE_RELE, file, line, ra);
}
#endif /* CONFIG_XFS_VNODE_TRACING */
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