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vfs: make path_openat take a struct filename pointer

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...and fix up the callers. For do_file_open_root, just declare a
struct filename on the stack and fill out the .name field. For
do_filp_open, make it also take a struct filename pointer, and fix up its
callers to call it appropriately.

For filp_open, add a variant that takes a struct filename pointer and turn
filp_open into a wrapper around it.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Jeff Layton
2012-10-10 16:43:10 -04:00
committed by Al Viro
parent 873f1eedc1
commit 669abf4e55
7 changed files with 42 additions and 21 deletions
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18
fs/namei.c
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@@ -2662,7 +2662,7 @@ out_dput:
*/
static int do_last(struct nameidata *nd, struct path *path,
struct file *file, const struct open_flags *op,
int *opened, const char *pathname)
int *opened, struct filename *name)
{
struct dentry *dir = nd->path.dentry;
int open_flag = op->open_flag;
@@ -2674,6 +2674,7 @@ static int do_last(struct nameidata *nd, struct path *path,
struct path save_parent = { .dentry = NULL, .mnt = NULL };
bool retried = false;
int error;
const char *pathname = name->name;
nd->flags &= ~LOOKUP_PARENT;
nd->flags |= op->intent;
@@ -2908,7 +2909,7 @@ stale_open:
goto retry_lookup;
}
static struct file *path_openat(int dfd, const char *pathname,
static struct file *path_openat(int dfd, struct filename *pathname,
struct nameidata *nd, const struct open_flags *op, int flags)
{
struct file *base = NULL;
@@ -2923,12 +2924,12 @@ static struct file *path_openat(int dfd, const char *pathname,
file->f_flags = op->open_flag;
error = path_init(dfd, pathname, flags | LOOKUP_PARENT, nd, &base);
error = path_init(dfd, pathname->name, flags | LOOKUP_PARENT, nd, &base);
if (unlikely(error))
goto out;
current->total_link_count = 0;
error = link_path_walk(pathname, nd);
error = link_path_walk(pathname->name, nd);
if (unlikely(error))
goto out;
@@ -2974,7 +2975,7 @@ out:
return file;
}
struct file *do_filp_open(int dfd, const char *pathname,
struct file *do_filp_open(int dfd, struct filename *pathname,
const struct open_flags *op, int flags)
{
struct nameidata nd;
@@ -2993,6 +2994,7 @@ struct file *do_file_open_root(struct dentry *dentry, struct vfsmount *mnt,
{
struct nameidata nd;
struct file *file;
struct filename filename = { .name = name };
nd.root.mnt = mnt;
nd.root.dentry = dentry;
@@ -3002,11 +3004,11 @@ struct file *do_file_open_root(struct dentry *dentry, struct vfsmount *mnt,
if (dentry->d_inode->i_op->follow_link && op->intent & LOOKUP_OPEN)
return ERR_PTR(-ELOOP);
file = path_openat(-1, name, &nd, op, flags | LOOKUP_RCU);
file = path_openat(-1, &filename, &nd, op, flags | LOOKUP_RCU);
if (unlikely(file == ERR_PTR(-ECHILD)))
file = path_openat(-1, name, &nd, op, flags);
file = path_openat(-1, &filename, &nd, op, flags);
if (unlikely(file == ERR_PTR(-ESTALE)))
file = path_openat(-1, name, &nd, op, flags | LOOKUP_REVAL);
file = path_openat(-1, &filename, &nd, op, flags | LOOKUP_REVAL);
return file;
}