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Subject[PATCH v3 094/110] namei: store inode in nd->stack[]
Date
From: Al Viro <viro@zeniv.linux.org.uk>

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/namei.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/fs/namei.c b/fs/namei.c
index e321450..366b0f3 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -507,6 +507,7 @@ struct nameidata {
struct path link;
void *cookie;
const char *name;
+ struct inode *inode;
} *stack, internal[EMBEDDED_LEVELS];
};

@@ -746,7 +747,7 @@ void nd_jump_link(struct path *path)
static inline void put_link(struct nameidata *nd)
{
struct saved *last = nd->stack + --nd->depth;
- struct inode *inode = last->link.dentry->d_inode;
+ struct inode *inode = last->inode;
if (last->cookie && inode->i_op->put_link)
inode->i_op->put_link(last->link.dentry, last->cookie);
path_put(&last->link);
@@ -779,7 +780,7 @@ static inline int may_follow_link(struct nameidata *nd)
return 0;

/* Allowed if owner and follower match. */
- inode = nd->stack[0].link.dentry->d_inode;
+ inode = nd->stack[0].inode;
if (uid_eq(current_cred()->fsuid, inode->i_uid))
return 0;

@@ -870,7 +871,7 @@ const char *get_link(struct nameidata *nd)
{
struct saved *last = nd->stack + nd->depth - 1;
struct dentry *dentry = last->link.dentry;
- struct inode *inode = dentry->d_inode;
+ struct inode *inode = last->inode;
int error;
const char *res;

@@ -1569,6 +1570,7 @@ static int pick_link(struct nameidata *nd, struct path *link, unsigned seq)
last = nd->stack + nd->depth++;
last->link = *link;
last->cookie = NULL;
+ last->inode = d_backing_inode(link->dentry);
return 1;
}

--
2.1.4


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