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d_path: Make get_dcookie() use a struct path argument

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get_dcookie() is always called with a dentry and a vfsmount from a struct
path.  Make get_dcookie() take it directly as an argument.

[[email protected]: coding-style fixes]
Signed-off-by: Jan Blunck <[email protected]>
Acked-by: Christoph Hellwig <[email protected]>
Cc: Al Viro <[email protected]>
Cc: "J. Bruce Fields" <[email protected]>
Cc: Neil Brown <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Jan Blunck 2008-02-14 19:38:36 -08:00 • committed by Linus Torvalds
commit 448678a0f3
4 changed files with 37 additions and 48 deletions
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34
fs/dcookies.c
View file

@ -24,6 +24,7 @@
#include <linux/errno.h>
#include <linux/dcookies.h>
#include <linux/mutex.h>
#include <linux/path.h>
#include <asm/uaccess.h>
/* The dcookies are allocated from a kmem_cache and
@ -31,8 +32,7 @@
* code here is particularly performance critical
*/
struct dcookie_struct {
struct dentry * dentry;
struct vfsmount * vfsmnt;
struct path path;
struct list_head hash_list;
};
@ -51,7 +51,7 @@ static inline int is_live(void)
/* The dentry is locked, its address will do for the cookie */
static inline unsigned long dcookie_value(struct dcookie_struct * dcs)
{
return (unsigned long)dcs->dentry;
return (unsigned long)dcs->path.dentry;
}
@ -89,19 +89,17 @@ static void hash_dcookie(struct dcookie_struct * dcs)
}
static struct dcookie_struct * alloc_dcookie(struct dentry * dentry,
struct vfsmount * vfsmnt)
static struct dcookie_struct *alloc_dcookie(struct path *path)
{
struct dcookie_struct * dcs = kmem_cache_alloc(dcookie_cache, GFP_KERNEL);
struct dcookie_struct *dcs = kmem_cache_alloc(dcookie_cache,
GFP_KERNEL);
if (!dcs)
return NULL;
dentry->d_cookie = dcs;
dcs->dentry = dget(dentry);
dcs->vfsmnt = mntget(vfsmnt);
path->dentry->d_cookie = dcs;
dcs->path = *path;
path_get(path);
hash_dcookie(dcs);
return dcs;
}
@ -109,8 +107,7 @@ static struct dcookie_struct * alloc_dcookie(struct dentry * dentry,
/* This is the main kernel-side routine that retrieves the cookie
* value for a dentry/vfsmnt pair.
*/
int get_dcookie(struct dentry * dentry, struct vfsmount * vfsmnt,
unsigned long * cookie)
int get_dcookie(struct path *path, unsigned long *cookie)
{
int err = 0;
struct dcookie_struct * dcs;
@ -122,10 +119,10 @@ int get_dcookie(struct dentry * dentry, struct vfsmount * vfsmnt,
goto out;
}
dcs = dentry->d_cookie;
dcs = path->dentry->d_cookie;
if (!dcs)
dcs = alloc_dcookie(dentry, vfsmnt);
dcs = alloc_dcookie(path);
if (!dcs) {
err = -ENOMEM;
@ -174,7 +171,7 @@ asmlinkage long sys_lookup_dcookie(u64 cookie64, char __user * buf, size_t len)
goto out;
/* FIXME: (deleted) ? */
path = d_path(dcs->dentry, dcs->vfsmnt, kbuf, PAGE_SIZE);
path = d_path(dcs->path.dentry, dcs->path.mnt, kbuf, PAGE_SIZE);
if (IS_ERR(path)) {
err = PTR_ERR(path);
@ -254,9 +251,8 @@ out_kmem:
static void free_dcookie(struct dcookie_struct * dcs)
{
dcs->dentry->d_cookie = NULL;
dput(dcs->dentry);
mntput(dcs->vfsmnt);
dcs->path.dentry->d_cookie = NULL;
path_put(&dcs->path);
kmem_cache_free(dcookie_cache, dcs);
}