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vfs: spread struct mount - mount group id handling 

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2011-11-24 19:54:23 -05:00
parent 4b2619a571
commit 4b8b21f4fe
3 changed files with 20 additions and 20 deletions
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36
fs/namespace.c
View File

@ -110,7 +110,7 @@ static void mnt_free_id(struct vfsmount *mnt)
*
* mnt_group_ida is protected by namespace_sem
*/
static int mnt_alloc_group_id(struct vfsmount *mnt)
static int mnt_alloc_group_id(struct mount *mnt)
{
int res;
@ -119,9 +119,9 @@ static int mnt_alloc_group_id(struct vfsmount *mnt)
res = ida_get_new_above(&mnt_group_ida,
mnt_group_start,
&mnt->mnt_group_id);
&mnt->mnt.mnt_group_id);
if (!res)
mnt_group_start = mnt->mnt_group_id + 1;
mnt_group_start = mnt->mnt.mnt_group_id + 1;
return res;
}
@ -129,13 +129,13 @@ static int mnt_alloc_group_id(struct vfsmount *mnt)
/*
* Release a peer group ID
*/
void mnt_release_group_id(struct vfsmount *mnt)
void mnt_release_group_id(struct mount *mnt)
{
int id = mnt->mnt_group_id;
int id = mnt->mnt.mnt_group_id;
ida_remove(&mnt_group_ida, id);
if (mnt_group_start > id)
mnt_group_start = id;
mnt->mnt_group_id = 0;
mnt->mnt.mnt_group_id = 0;
}
/*
@ -701,7 +701,7 @@ static struct vfsmount *clone_mnt(struct vfsmount *old, struct dentry *root,
mnt->mnt_group_id = old->mnt_group_id;
if ((flag & CL_MAKE_SHARED) && !mnt->mnt_group_id) {
int err = mnt_alloc_group_id(mnt);
int err = mnt_alloc_group_id(real_mount(mnt));
if (err)
goto out_free;
}
@ -1497,25 +1497,25 @@ int iterate_mounts(int (*f)(struct vfsmount *, void *), void *arg,
return 0;
}
static void cleanup_group_ids(struct vfsmount *mnt, struct vfsmount *end)
static void cleanup_group_ids(struct mount *mnt, struct mount *end)
{
struct mount *p;
for (p = real_mount(mnt); &p->mnt != end; p = next_mnt(p, mnt)) {
for (p = mnt; p != end; p = next_mnt(p, &mnt->mnt)) {
if (p->mnt.mnt_group_id && !IS_MNT_SHARED(&p->mnt))
mnt_release_group_id(&p->mnt);
mnt_release_group_id(p);
}
}
static int invent_group_ids(struct vfsmount *mnt, bool recurse)
static int invent_group_ids(struct mount *mnt, bool recurse)
{
struct mount *p;
for (p = real_mount(mnt); p; p = recurse ? next_mnt(p, mnt) : NULL) {
for (p = mnt; p; p = recurse ? next_mnt(p, &mnt->mnt) : NULL) {
if (!p->mnt.mnt_group_id && !IS_MNT_SHARED(&p->mnt)) {
int err = mnt_alloc_group_id(&p->mnt);
int err = mnt_alloc_group_id(p);
if (err) {
cleanup_group_ids(mnt, &p->mnt);
cleanup_group_ids(mnt, p);
return err;
}
}
@ -1597,7 +1597,7 @@ static int attach_recursive_mnt(struct vfsmount *source_mnt,
int err;
if (IS_MNT_SHARED(dest_mnt)) {
err = invent_group_ids(source_mnt, true);
err = invent_group_ids(real_mount(source_mnt), true);
if (err)
goto out;
}
@ -1630,7 +1630,7 @@ static int attach_recursive_mnt(struct vfsmount *source_mnt,
out_cleanup_ids:
if (IS_MNT_SHARED(dest_mnt))
cleanup_group_ids(source_mnt, NULL);
cleanup_group_ids(real_mount(source_mnt), NULL);
out:
return err;
}
@ -1700,7 +1700,7 @@ static int flags_to_propagation_type(int flags)
static int do_change_type(struct path *path, int flag)
{
struct mount *m;
struct vfsmount *mnt = path->mnt;
struct mount *mnt = real_mount(path->mnt);
int recurse = flag & MS_REC;
int type;
int err = 0;
@ -1723,7 +1723,7 @@ static int do_change_type(struct path *path, int flag)
}
br_write_lock(vfsmount_lock);
for (m = real_mount(mnt); m; m = (recurse ? next_mnt(m, mnt) : NULL))
for (m = mnt; m; m = (recurse ? next_mnt(m, &mnt->mnt) : NULL))
change_mnt_propagation(&m->mnt, type);
br_write_unlock(vfsmount_lock);

2
fs/pnode.c
View File

@ -83,7 +83,7 @@ static int do_make_slave(struct vfsmount *mnt)
peer_mnt = NULL;
}
if (IS_MNT_SHARED(mnt) && list_empty(&mnt->mnt_share))
mnt_release_group_id(mnt);
mnt_release_group_id(real_mount(mnt));
list_del_init(&mnt->mnt_share);
mnt->mnt_group_id = 0;

2
fs/pnode.h
View File

@ -34,7 +34,7 @@ int propagate_mnt(struct vfsmount *, struct dentry *, struct vfsmount *,
struct list_head *);
int propagate_umount(struct list_head *);
int propagate_mount_busy(struct vfsmount *, int);
void mnt_release_group_id(struct vfsmount *);
void mnt_release_group_id(struct mount *);
int get_dominating_id(struct vfsmount *mnt, const struct path *root);
unsigned int mnt_get_count(struct vfsmount *mnt);
void mnt_set_mountpoint(struct vfsmount *, struct dentry *,