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vfs: and now we can make ->mnt_master point to struct mount

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2011-11-25 00:10:28 -05:00
parent d10e8def07
commit 32301920f4
3 changed files with 12 additions and 12 deletions
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2
fs/mount.h
View File

@ -20,7 +20,7 @@ struct mount {
struct list_head mnt_mounts; /* list of children, anchored here */ struct list_head mnt_mounts; /* list of children, anchored here */
struct list_head mnt_child; /* and going through their mnt_child */ struct list_head mnt_child; /* and going through their mnt_child */
/* yet to be moved - up to mnt_slave */ /* yet to be moved - up to mnt_slave */
struct vfsmount *mnt_master; /* slave is on master->mnt_slave_list */ struct mount *mnt_master; /* slave is on master->mnt_slave_list */
}; };
static inline struct mount *real_mount(struct vfsmount *mnt) static inline struct mount *real_mount(struct vfsmount *mnt)

4
fs/namespace.c
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@ -715,7 +715,7 @@ static struct mount *clone_mnt(struct mount *old, struct dentry *root,
if (flag & CL_SLAVE) { if (flag & CL_SLAVE) {
list_add(&mnt->mnt.mnt_slave, &old->mnt.mnt_slave_list); list_add(&mnt->mnt.mnt_slave, &old->mnt.mnt_slave_list);
mnt->mnt_master = &old->mnt; mnt->mnt_master = old;
CLEAR_MNT_SHARED(&mnt->mnt); CLEAR_MNT_SHARED(&mnt->mnt);
} else if (!(flag & CL_PRIVATE)) { } else if (!(flag & CL_PRIVATE)) {
if ((flag & CL_MAKE_SHARED) || IS_MNT_SHARED(&old->mnt)) if ((flag & CL_MAKE_SHARED) || IS_MNT_SHARED(&old->mnt))
@ -1052,7 +1052,7 @@ static int show_mountinfo(struct seq_file *m, void *v)
if (IS_MNT_SHARED(mnt)) if (IS_MNT_SHARED(mnt))
seq_printf(m, " shared:%i", mnt->mnt_group_id); seq_printf(m, " shared:%i", mnt->mnt_group_id);
if (IS_MNT_SLAVE(r)) { if (IS_MNT_SLAVE(r)) {
int master = r->mnt_master->mnt_group_id; int master = r->mnt_master->mnt.mnt_group_id;
int dom = get_dominating_id(r, &p->root); int dom = get_dominating_id(r, &p->root);
seq_printf(m, " master:%i", master); seq_printf(m, " master:%i", master);
if (dom && dom != master) if (dom && dom != master)

18
fs/pnode.c
View File

@ -55,7 +55,7 @@ int get_dominating_id(struct mount *mnt, const struct path *root)
{ {
struct mount *m; struct mount *m;
for (m = real_mount(mnt->mnt_master); m != NULL; m = real_mount(m->mnt_master)) { for (m = mnt->mnt_master; m != NULL; m = m->mnt_master) {
struct mount *d = get_peer_under_root(m, mnt->mnt.mnt_ns, root); struct mount *d = get_peer_under_root(m, mnt->mnt.mnt_ns, root);
if (d) if (d)
return d->mnt.mnt_group_id; return d->mnt.mnt_group_id;
@ -66,7 +66,7 @@ int get_dominating_id(struct mount *mnt, const struct path *root)
static int do_make_slave(struct mount *mnt) static int do_make_slave(struct mount *mnt)
{ {
struct mount *peer_mnt = mnt, *master = real_mount(mnt->mnt_master); struct mount *peer_mnt = mnt, *master = mnt->mnt_master;
struct mount *slave_mnt; struct mount *slave_mnt;
/* /*
@ -93,7 +93,7 @@ static int do_make_slave(struct mount *mnt)
if (master) { if (master) {
list_for_each_entry(slave_mnt, &mnt->mnt.mnt_slave_list, mnt.mnt_slave) list_for_each_entry(slave_mnt, &mnt->mnt.mnt_slave_list, mnt.mnt_slave)
slave_mnt->mnt_master = &master->mnt; slave_mnt->mnt_master = master;
list_move(&mnt->mnt.mnt_slave, &master->mnt.mnt_slave_list); list_move(&mnt->mnt.mnt_slave, &master->mnt.mnt_slave_list);
list_splice(&mnt->mnt.mnt_slave_list, master->mnt.mnt_slave_list.prev); list_splice(&mnt->mnt.mnt_slave_list, master->mnt.mnt_slave_list.prev);
INIT_LIST_HEAD(&mnt->mnt.mnt_slave_list); INIT_LIST_HEAD(&mnt->mnt.mnt_slave_list);
@ -106,7 +106,7 @@ static int do_make_slave(struct mount *mnt)
slave_mnt->mnt_master = NULL; slave_mnt->mnt_master = NULL;
} }
} }
mnt->mnt_master = &master->mnt; mnt->mnt_master = master;
CLEAR_MNT_SHARED(&mnt->mnt); CLEAR_MNT_SHARED(&mnt->mnt);
return 0; return 0;
} }
@ -149,9 +149,9 @@ static struct mount *propagation_next(struct mount *m,
return first_slave(m); return first_slave(m);
while (1) { while (1) {
struct mount *master = real_mount(m->mnt_master); struct mount *master = m->mnt_master;
if (&master->mnt == origin->mnt_master) { if (master == origin->mnt_master) {
struct mount *next = next_peer(m); struct mount *next = next_peer(m);
return (next == origin) ? NULL : next; return (next == origin) ? NULL : next;
} else if (m->mnt.mnt_slave.next != &master->mnt.mnt_slave_list) } else if (m->mnt.mnt_slave.next != &master->mnt.mnt_slave_list)
@ -179,11 +179,11 @@ static struct mount *get_source(struct mount *dest,
struct mount *p_last_src = NULL; struct mount *p_last_src = NULL;
struct mount *p_last_dest = NULL; struct mount *p_last_dest = NULL;
while (&last_dest->mnt != dest->mnt_master) { while (last_dest != dest->mnt_master) {
p_last_dest = last_dest; p_last_dest = last_dest;
p_last_src = last_src; p_last_src = last_src;
last_dest = real_mount(last_dest->mnt_master); last_dest = last_dest->mnt_master;
last_src = real_mount(last_src->mnt_master); last_src = last_src->mnt_master;
} }
if (p_last_dest) { if (p_last_dest) {