get rid of nd->file

Don't stash the struct file * used as starting point of walk in nameidata;
pass file ** to path_init() instead.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/fs/namei.c b/fs/namei.c
index 85f6e39..a260a30 100644 (file)
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1498,7 +1498,8 @@ lookup_parent:
        return err;
 }
 
-static int path_init(int dfd, const char *name, unsigned int flags, struct nameidata *nd)
+static int path_init(int dfd, const char *name, unsigned int flags,
+                    struct nameidata *nd, struct file **fp)
 {
        int retval = 0;
        int fput_needed;
@@ -1508,7 +1509,6 @@ static int path_init(int dfd, const char *name, unsigned int flags, struct namei
        nd->flags = flags | LOOKUP_JUMPED;
        nd->depth = 0;
        nd->root.mnt = NULL;
-       nd->file = NULL;
 
        if (*name=='/') {
                if (flags & LOOKUP_RCU) {
@@ -1557,7 +1557,7 @@ static int path_init(int dfd, const char *name, unsigned int flags, struct namei
                nd->path = file->f_path;
                if (flags & LOOKUP_RCU) {
                        if (fput_needed)
-                               nd->file = file;
+                               *fp = file;
                        nd->seq = __read_seqcount_begin(&nd->path.dentry->d_seq);
                        br_read_lock(vfsmount_lock);
                        rcu_read_lock();
@@ -1580,6 +1580,7 @@ out_fail:
 static int path_lookupat(int dfd, const char *name,
                                unsigned int flags, struct nameidata *nd)
 {
+       struct file *base = NULL;
        int retval;
 
        /*
@@ -1596,7 +1597,7 @@ static int path_lookupat(int dfd, const char *name,
         * be handled by restarting a traditional ref-walk (which will always
         * be able to complete).
         */
-       retval = path_init(dfd, name, flags, nd);
+       retval = path_init(dfd, name, flags, nd, &base);
 
        if (unlikely(retval))
                return retval;
@@ -1614,10 +1615,8 @@ static int path_lookupat(int dfd, const char *name,
        if (!retval)
                retval = handle_reval_path(nd);
 
-       if (nd->file) {
-               fput(nd->file);
-               nd->file = NULL;
-       }
+       if (base)
+               fput(base);
 
        if (nd->root.mnt) {
                path_put(&nd->root);

diff --git a/include/linux/namei.h b/include/linux/namei.h
index 265378a..72ffd62 100644 (file)
--- a/include/linux/namei.h
+++ b/include/linux/namei.h
@@ -19,7 +19,6 @@ struct nameidata {
        struct path     path;
        struct qstr     last;
        struct path     root;
-       struct file     *file;
        struct inode    *inode; /* path.dentry.d_inode */
        unsigned int    flags;
        unsigned        seq;