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[XFS] streamline the clear_inode path

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SGI-PV: 940531
SGI-Modid: xfs-linux:xfs-kern:196888a

Signed-off-by: Christoph Hellwig <hch@sgi.com>
Signed-off-by: Nathan Scott <nathans@sgi.com>
This commit is contained in:
Christoph Hellwig 2005-09-05 08:23:54 +10:00 committed by Nathan Scott
parent c1a073bdff
commit 56d433e430
3 changed files with 25 additions and 156 deletions
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34
fs/xfs/linux-2.6/xfs_super.c
View File

@ -383,18 +383,34 @@ linvfs_clear_inode(
struct inode *inode)
{
vnode_t *vp = LINVFS_GET_VP(inode);
int error, cache;
if (vp) {
vn_rele(vp);
vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address);
/*
* Do all our cleanup, and remove this vnode.
*/
vn_remove(vp);
}
vn_trace_entry(vp, "clear_inode", (inst_t *)__return_address);
ASSERT(vp->v_fbhv != NULL);
XFS_STATS_INC(vn_rele);
XFS_STATS_INC(vn_remove);
XFS_STATS_INC(vn_reclaim);
XFS_STATS_DEC(vn_active);
VOP_INACTIVE(vp, NULL, cache);
VN_LOCK(vp);
vp->v_flag &= ~VMODIFIED;
VN_UNLOCK(vp, 0);
VOP_RECLAIM(vp, error);
if (error)
panic("vn_purge: cannot reclaim");
ASSERT(vp->v_fbhv == NULL);
#ifdef XFS_VNODE_TRACE
ktrace_free(vp->v_trace);
#endif
}
/*
* Enqueue a work item to be picked up by the vfs xfssyncd thread.
* Doing this has two advantages:

144
fs/xfs/linux-2.6/xfs_vnode.c
View File

@ -71,39 +71,6 @@ vn_iowake(
wake_up(vptosync(vp));
}
/*
* Clean a vnode of filesystem-specific data and prepare it for reuse.
*/
STATIC int
vn_reclaim(
struct vnode *vp)
{
int error;
XFS_STATS_INC(vn_reclaim);
vn_trace_entry(vp, "vn_reclaim", (inst_t *)__return_address);
/*
* Only make the VOP_RECLAIM call if there are behaviors
* to call.
*/
if (vp->v_fbhv) {
VOP_RECLAIM(vp, error);
if (error)
return -error;
}
ASSERT(vp->v_fbhv == NULL);
vp->v_fbhv = NULL;
#ifdef XFS_VNODE_TRACE
ktrace_free(vp->v_trace);
vp->v_trace = NULL;
#endif
return 0;
}
struct vnode *
vn_initialize(
struct inode *inode)
@ -197,51 +164,6 @@ vn_revalidate(
return -error;
}
/*
* 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 vnode *vp,
vmap_t *vmap)
{
vn_trace_entry(vp, "vn_purge", (inst_t *)__return_address);
/*
* Check whether vp has already been reclaimed since our caller
* sampled its version while holding a filesystem cache lock that
* its VOP_RECLAIM function acquires.
*/
VN_LOCK(vp);
if (vp->v_number != vmap->v_number) {
VN_UNLOCK(vp, 0);
return;
}
/*
* Another process could have raced in and gotten this vnode...
*/
if (vn_count(vp) > 0) {
VN_UNLOCK(vp, 0);
return;
}
XFS_STATS_DEC(vn_active);
VN_UNLOCK(vp, 0);
/*
* Call VOP_RECLAIM and clean vp. The FSYNC_INVAL flag tells
* vp's filesystem to flush and invalidate all cached resources.
* When vn_reclaim returns, vp should have no private data,
* either in a system cache or attached to v_data.
*/
if (vn_reclaim(vp) != 0)
panic("vn_purge: cannot reclaim");
}
/*
* Add a reference to a referenced vnode.
*/
@ -261,72 +183,6 @@ vn_hold(
return vp;
}
/*
* Call VOP_INACTIVE on last reference.
*/
void
vn_rele(
struct vnode *vp)
{
int vcnt;
int cache;
XFS_STATS_INC(vn_rele);
VN_LOCK(vp);
vn_trace_entry(vp, "vn_rele", (inst_t *)__return_address);
vcnt = vn_count(vp);
/*
* Since we always get called from put_inode we know
* that i_count won't be decremented after we
* return.
*/
if (!vcnt) {
VN_UNLOCK(vp, 0);
/*
* Do not make the VOP_INACTIVE call if there
* are no behaviors attached to the vnode to call.
*/
if (vp->v_fbhv)
VOP_INACTIVE(vp, NULL, cache);
VN_LOCK(vp);
vp->v_flag &= ~VMODIFIED;
}
VN_UNLOCK(vp, 0);
vn_trace_exit(vp, "vn_rele", (inst_t *)__return_address);
}
/*
* Finish the removal of a vnode.
*/
void
vn_remove(
struct 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 XFS_VNODE_TRACE
#define KTRACE_ENTER(vp, vk, s, line, ra) \

3
fs/xfs/linux-2.6/xfs_vnode.h
View File

@ -502,10 +502,8 @@ typedef struct vnode_map {
(vmap).v_number = (vp)->v_number, \
(vmap).v_ino = (vp)->v_inode.i_ino; }
extern void vn_purge(struct vnode *, vmap_t *);
extern int vn_revalidate(struct vnode *);
extern void vn_revalidate_core(struct vnode *, vattr_t *);
extern void vn_remove(struct vnode *);
extern void vn_iowait(struct vnode *vp);
extern void vn_iowake(struct vnode *vp);
@ -519,7 +517,6 @@ static inline int vn_count(struct vnode *vp)
* Vnode reference counting functions (and macros for compatibility).
*/
extern vnode_t *vn_hold(struct vnode *);
extern void vn_rele(struct vnode *);
#if defined(XFS_VNODE_TRACE)
#define VN_HOLD(vp) \