summaryrefslogtreecommitdiff
path: root/fs/open.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/open.c')
-rw-r--r--fs/open.c87
1 files changed, 2 insertions, 85 deletions
diff --git a/fs/open.c b/fs/open.c
index 13bece4f36a4..937f4ec20180 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -771,46 +771,6 @@ static struct file *__dentry_open(struct dentry *dentry, struct vfsmount *mnt,
}
/**
- * lookup_instantiate_filp - instantiates the open intent filp
- * @nd: pointer to nameidata
- * @dentry: pointer to dentry
- * @open: open callback
- *
- * Helper for filesystems that want to use lookup open intents and pass back
- * a fully instantiated struct file to the caller.
- * This function is meant to be called from within a filesystem's
- * lookup method.
- * Beware of calling it for non-regular files! Those ->open methods might block
- * (e.g. in fifo_open), leaving you with parent locked (and in case of fifo,
- * leading to a deadlock, as nobody can open that fifo anymore, because
- * another process to open fifo will block on locked parent when doing lookup).
- * Note that in case of error, nd->intent.open.file is destroyed, but the
- * path information remains valid.
- * If the open callback is set to NULL, then the standard f_op->open()
- * filesystem callback is substituted.
- */
-struct file *lookup_instantiate_filp(struct nameidata *nd, struct dentry *dentry,
- int (*open)(struct inode *, struct file *))
-{
- const struct cred *cred = current_cred();
-
- if (IS_ERR(nd->intent.open.file))
- goto out;
- if (IS_ERR(dentry))
- goto out_err;
- nd->intent.open.file = __dentry_open(dget(dentry), mntget(nd->path.mnt),
- nd->intent.open.file,
- open, cred);
-out:
- return nd->intent.open.file;
-out_err:
- release_open_intent(nd);
- nd->intent.open.file = ERR_CAST(dentry);
- goto out;
-}
-EXPORT_SYMBOL_GPL(lookup_instantiate_filp);
-
-/**
* finish_open - finish opening a file
* @od: opaque open data
* @dentry: pointer to dentry
@@ -829,9 +789,9 @@ struct file *finish_open(struct opendata *od, struct dentry *dentry,
mntget(od->mnt);
dget(dentry);
- res = do_dentry_open(dentry, od->mnt, *od->filp, open, current_cred());
+ res = do_dentry_open(dentry, od->mnt, od->filp, open, current_cred());
if (!IS_ERR(res))
- *od->filp = NULL;
+ od->filp = NULL;
return res;
}
@@ -852,49 +812,6 @@ void finish_no_open(struct opendata *od, struct dentry *dentry)
}
EXPORT_SYMBOL(finish_no_open);
-/**
- * nameidata_to_filp - convert a nameidata to an open filp.
- * @nd: pointer to nameidata
- * @flags: open flags
- *
- * Note that this function destroys the original nameidata
- */
-struct file *nameidata_to_filp(struct nameidata *nd)
-{
- const struct cred *cred = current_cred();
- struct file *filp;
-
- /* Pick up the filp from the open intent */
- filp = nd->intent.open.file;
-
- /* Has the filesystem initialised the file for us? */
- if (filp->f_path.dentry != NULL) {
- nd->intent.open.file = NULL;
- } else {
- struct file *res;
-
- path_get(&nd->path);
- res = do_dentry_open(nd->path.dentry, nd->path.mnt,
- filp, NULL, cred);
- if (!IS_ERR(res)) {
- int error;
-
- nd->intent.open.file = NULL;
- BUG_ON(res != filp);
-
- error = open_check_o_direct(filp);
- if (error) {
- fput(filp);
- filp = ERR_PTR(error);
- }
- } else {
- /* Allow nd->intent.open.file to be recycled */
- filp = res;
- }
- }
- return filp;
-}
-
/*
* dentry_open() will have done dput(dentry) and mntput(mnt) if it returns an
* error.