diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/fhandle.c | 4 | ||||
| -rw-r--r-- | fs/mount.h | 2 | ||||
| -rw-r--r-- | fs/namespace.c | 30 | ||||
| -rw-r--r-- | fs/pnode.c | 4 |
4 files changed, 22 insertions, 18 deletions
diff --git a/fs/fhandle.c b/fs/fhandle.c index 6b088641f5bf..5eff7116951e 100644 --- a/fs/fhandle.c +++ b/fs/fhandle.c @@ -10,6 +10,7 @@ #include <linux/personality.h> #include <asm/uaccess.h> #include "internal.h" +#include "mount.h" static long do_sys_name_to_handle(struct path *path, struct file_handle __user *ufh, @@ -66,7 +67,8 @@ static long do_sys_name_to_handle(struct path *path, } else retval = 0; /* copy the mount id */ - if (copy_to_user(mnt_id, &path->mnt->mnt_id, sizeof(*mnt_id)) || + if (copy_to_user(mnt_id, &real_mount(path->mnt)->mnt_id, + sizeof(*mnt_id)) || copy_to_user(ufh, handle, sizeof(struct file_handle) + handle_bytes)) retval = -EFAULT; diff --git a/fs/mount.h b/fs/mount.h index 4a5f1dca0c2e..c7bd401960ea 100644 --- a/fs/mount.h +++ b/fs/mount.h @@ -26,6 +26,8 @@ struct mount { struct list_head mnt_slave; /* slave list entry */ struct mount *mnt_master; /* slave is on master->mnt_slave_list */ struct mnt_namespace *mnt_ns; /* containing namespace */ + int mnt_id; /* mount identifier */ + int mnt_group_id; /* peer group identifier */ }; static inline struct mount *real_mount(struct vfsmount *mnt) diff --git a/fs/namespace.c b/fs/namespace.c index 4cdb7f698613..dfed9a25f204 100644 --- a/fs/namespace.c +++ b/fs/namespace.c @@ -85,9 +85,9 @@ static int mnt_alloc_id(struct mount *mnt) retry: ida_pre_get(&mnt_id_ida, GFP_KERNEL); spin_lock(&mnt_id_lock); - res = ida_get_new_above(&mnt_id_ida, mnt_id_start, &mnt->mnt.mnt_id); + res = ida_get_new_above(&mnt_id_ida, mnt_id_start, &mnt->mnt_id); if (!res) - mnt_id_start = mnt->mnt.mnt_id + 1; + mnt_id_start = mnt->mnt_id + 1; spin_unlock(&mnt_id_lock); if (res == -EAGAIN) goto retry; @@ -97,7 +97,7 @@ retry: static void mnt_free_id(struct mount *mnt) { - int id = mnt->mnt.mnt_id; + int id = mnt->mnt_id; spin_lock(&mnt_id_lock); ida_remove(&mnt_id_ida, id); if (mnt_id_start > id) @@ -119,9 +119,9 @@ static int mnt_alloc_group_id(struct mount *mnt) res = ida_get_new_above(&mnt_group_ida, mnt_group_start, - &mnt->mnt.mnt_group_id); + &mnt->mnt_group_id); if (!res) - mnt_group_start = mnt->mnt.mnt_group_id + 1; + mnt_group_start = mnt->mnt_group_id + 1; return res; } @@ -131,11 +131,11 @@ static int mnt_alloc_group_id(struct mount *mnt) */ void mnt_release_group_id(struct mount *mnt) { - int id = mnt->mnt.mnt_group_id; + int id = mnt->mnt_group_id; ida_remove(&mnt_group_ida, id); if (mnt_group_start > id) mnt_group_start = id; - mnt->mnt.mnt_group_id = 0; + mnt->mnt_group_id = 0; } /* @@ -696,11 +696,11 @@ static struct mount *clone_mnt(struct mount *old, struct dentry *root, if (mnt) { if (flag & (CL_SLAVE | CL_PRIVATE)) - mnt->mnt.mnt_group_id = 0; /* not a peer of original */ + mnt->mnt_group_id = 0; /* not a peer of original */ else - mnt->mnt.mnt_group_id = old->mnt.mnt_group_id; + mnt->mnt_group_id = old->mnt_group_id; - if ((flag & CL_MAKE_SHARED) && !mnt->mnt.mnt_group_id) { + if ((flag & CL_MAKE_SHARED) && !mnt->mnt_group_id) { int err = mnt_alloc_group_id(mnt); if (err) goto out_free; @@ -1029,7 +1029,7 @@ static int show_mountinfo(struct seq_file *m, void *v) struct path root = p->root; int err = 0; - seq_printf(m, "%i %i %u:%u ", mnt->mnt_id, r->mnt_parent->mnt.mnt_id, + seq_printf(m, "%i %i %u:%u ", r->mnt_id, r->mnt_parent->mnt_id, MAJOR(sb->s_dev), MINOR(sb->s_dev)); if (sb->s_op->show_path) err = sb->s_op->show_path(m, mnt); @@ -1049,9 +1049,9 @@ static int show_mountinfo(struct seq_file *m, void *v) /* Tagged fields ("foo:X" or "bar") */ if (IS_MNT_SHARED(mnt)) - seq_printf(m, " shared:%i", mnt->mnt_group_id); + seq_printf(m, " shared:%i", r->mnt_group_id); if (IS_MNT_SLAVE(r)) { - int master = r->mnt_master->mnt.mnt_group_id; + int master = r->mnt_master->mnt_group_id; int dom = get_dominating_id(r, &p->root); seq_printf(m, " master:%i", master); if (dom && dom != master) @@ -1507,7 +1507,7 @@ static void cleanup_group_ids(struct mount *mnt, struct mount *end) struct mount *p; for (p = mnt; p != end; p = next_mnt(p, &mnt->mnt)) { - if (p->mnt.mnt_group_id && !IS_MNT_SHARED(&p->mnt)) + if (p->mnt_group_id && !IS_MNT_SHARED(&p->mnt)) mnt_release_group_id(p); } } @@ -1517,7 +1517,7 @@ static int invent_group_ids(struct mount *mnt, bool recurse) struct mount *p; for (p = mnt; p; p = recurse ? next_mnt(p, &mnt->mnt) : NULL) { - if (!p->mnt.mnt_group_id && !IS_MNT_SHARED(&p->mnt)) { + if (!p->mnt_group_id && !IS_MNT_SHARED(&p->mnt)) { int err = mnt_alloc_group_id(p); if (err) { cleanup_group_ids(mnt, p); diff --git a/fs/pnode.c b/fs/pnode.c index cec329822a16..001c8b0df379 100644 --- a/fs/pnode.c +++ b/fs/pnode.c @@ -58,7 +58,7 @@ int get_dominating_id(struct mount *mnt, const struct path *root) for (m = mnt->mnt_master; m != NULL; m = m->mnt_master) { struct mount *d = get_peer_under_root(m, mnt->mnt_ns, root); if (d) - return d->mnt.mnt_group_id; + return d->mnt_group_id; } return 0; @@ -86,7 +86,7 @@ static int do_make_slave(struct mount *mnt) mnt_release_group_id(mnt); list_del_init(&mnt->mnt_share); - mnt->mnt.mnt_group_id = 0; + mnt->mnt_group_id = 0; if (peer_mnt) master = peer_mnt; |