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NFS: Convert struct nfs_open_context to use a kref 

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust 2007-06-17 16:02:44 -04:00
parent edc05fc1c2
commit 3bec63db55
2 changed files with 25 additions and 18 deletions
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40
fs/nfs/inode.c
View File

@ -461,7 +461,6 @@ static struct nfs_open_context *alloc_nfs_open_context(struct vfsmount *mnt, str
ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
if (ctx != NULL) {
atomic_set(&ctx->count, 1);
ctx->path.dentry = dget(dentry);
ctx->path.mnt = mntget(mnt);
ctx->cred = get_rpccred(cred);
@ -469,6 +468,7 @@ static struct nfs_open_context *alloc_nfs_open_context(struct vfsmount *mnt, str
ctx->lockowner = current->files;
ctx->error = 0;
ctx->dir_cookie = 0;
kref_init(&ctx->kref);
}
return ctx;
}
@ -476,27 +476,33 @@ static struct nfs_open_context *alloc_nfs_open_context(struct vfsmount *mnt, str
struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx)
{
if (ctx != NULL)
atomic_inc(&ctx->count);
kref_get(&ctx->kref);
return ctx;
}
static void nfs_free_open_context(struct kref *kref)
{
struct nfs_open_context *ctx = container_of(kref,
struct nfs_open_context, kref);
if (!list_empty(&ctx->list)) {
struct inode *inode = ctx->path.dentry->d_inode;
spin_lock(&inode->i_lock);
list_del(&ctx->list);
spin_unlock(&inode->i_lock);
}
if (ctx->state != NULL)
nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
if (ctx->cred != NULL)
put_rpccred(ctx->cred);
dput(ctx->path.dentry);
mntput(ctx->path.mnt);
kfree(ctx);
}
void put_nfs_open_context(struct nfs_open_context *ctx)
{
if (atomic_dec_and_test(&ctx->count)) {
if (!list_empty(&ctx->list)) {
struct inode *inode = ctx->path.dentry->d_inode;
spin_lock(&inode->i_lock);
list_del(&ctx->list);
spin_unlock(&inode->i_lock);
}
if (ctx->state != NULL)
nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
if (ctx->cred != NULL)
put_rpccred(ctx->cred);
dput(ctx->path.dentry);
mntput(ctx->path.mnt);
kfree(ctx);
}
kref_put(&ctx->kref, nfs_free_open_context);
}
/*

3
include/linux/nfs_fs.h
View File

@ -30,6 +30,7 @@
#ifdef __KERNEL__
#include <linux/in.h>
#include <linux/kref.h>
#include <linux/mm.h>
#include <linux/namei.h>
#include <linux/pagemap.h>
@ -70,7 +71,7 @@ struct nfs_access_entry {
struct nfs4_state;
struct nfs_open_context {
atomic_t count;
struct kref kref;
struct path path;
struct rpc_cred *cred;
struct nfs4_state *state;