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beginning of transtion: ->mount()

Browse Source 
eventual replacement for ->get_sb() - does *not* get vfsmount,
return ERR_PTR(error) or root of subtree to be mounted.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2010-07-25 00:17:56 +04:00
parent d893f1bc2a
commit c96e41e92b
2 changed files with 16 additions and 3 deletions
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17
fs/super.c
View File

@ -918,6 +918,7 @@ struct vfsmount *
vfs_kern_mount(struct file_system_type *type, int flags, const char *name, void *data)
{
struct vfsmount *mnt;
struct dentry *root;
char *secdata = NULL;
int error;
@ -942,9 +943,19 @@ vfs_kern_mount(struct file_system_type *type, int flags, const char *name, void
goto out_free_secdata;
}
error = type->get_sb(type, flags, name, data, mnt);
if (error < 0)
goto out_free_secdata;
if (type->mount) {
root = type->mount(type, flags, name, data);
if (IS_ERR(root)) {
error = PTR_ERR(root);
goto out_free_secdata;
}
mnt->mnt_root = root;
mnt->mnt_sb = root->d_sb;
} else {
error = type->get_sb(type, flags, name, data, mnt);
if (error < 0)
goto out_free_secdata;
}
BUG_ON(!mnt->mnt_sb);
WARN_ON(!mnt->mnt_sb->s_bdi);
mnt->mnt_sb->s_flags |= MS_BORN;

2
include/linux/fs.h
View File

@ -1772,6 +1772,8 @@ struct file_system_type {
int fs_flags;
int (*get_sb) (struct file_system_type *, int,
const char *, void *, struct vfsmount *);
struct dentry *(*mount) (struct file_system_type *, int,
const char *, void *);
void (*kill_sb) (struct super_block *);
struct module *owner;
struct file_system_type * next;