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| author | Al Viro <viro@zeniv.linux.org.uk> | 2011-11-25 04:59:16 +0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2012-01-04 07:57:00 +0400 |
| commit | 0fb54e50562d8d6f4b1a4517ba9783a9c7c5c2b7 (patch) | |
| tree | 5cb0c780208f837b004b7cc0be18e6dff3839246 /fs/namespace.c | |
| parent | 4b8b21f4fe16ee15eec5c69ea5fb41b30e428e59 (diff) | |
| download | linux-0fb54e50562d8d6f4b1a4517ba9783a9c7c5c2b7.tar.xz | |
vfs: spread struct mount - attach_recursive_mnt
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/namespace.c')
| -rw-r--r-- | fs/namespace.c | 25 |
1 files changed, 14 insertions, 11 deletions
diff --git a/fs/namespace.c b/fs/namespace.c index 60d5c15c0879..64ae40c91079 100644 --- a/fs/namespace.c +++ b/fs/namespace.c @@ -1587,7 +1587,7 @@ static int invent_group_ids(struct mount *mnt, bool recurse) * Must be called without spinlocks held, since this function can sleep * in allocations. */ -static int attach_recursive_mnt(struct vfsmount *source_mnt, +static int attach_recursive_mnt(struct mount *source_mnt, struct path *path, struct path *parent_path) { LIST_HEAD(tree_list); @@ -1597,27 +1597,27 @@ static int attach_recursive_mnt(struct vfsmount *source_mnt, int err; if (IS_MNT_SHARED(dest_mnt)) { - err = invent_group_ids(real_mount(source_mnt), true); + err = invent_group_ids(source_mnt, true); if (err) goto out; } - err = propagate_mnt(dest_mnt, dest_dentry, source_mnt, &tree_list); + err = propagate_mnt(dest_mnt, dest_dentry, &source_mnt->mnt, &tree_list); if (err) goto out_cleanup_ids; br_write_lock(vfsmount_lock); if (IS_MNT_SHARED(dest_mnt)) { - for (p = real_mount(source_mnt); p; p = next_mnt(p, source_mnt)) + for (p = source_mnt; p; p = next_mnt(p, &source_mnt->mnt)) set_mnt_shared(&p->mnt); } if (parent_path) { - detach_mnt(real_mount(source_mnt), parent_path); - attach_mnt(real_mount(source_mnt), path); + detach_mnt(source_mnt, parent_path); + attach_mnt(source_mnt, path); touch_mnt_namespace(parent_path->mnt->mnt_ns); } else { - mnt_set_mountpoint(dest_mnt, dest_dentry, source_mnt); - commit_tree(real_mount(source_mnt)); + mnt_set_mountpoint(dest_mnt, dest_dentry, &source_mnt->mnt); + commit_tree(source_mnt); } list_for_each_entry_safe(child, p, &tree_list, mnt.mnt_hash) { @@ -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(real_mount(source_mnt), NULL); + cleanup_group_ids(source_mnt, NULL); out: return err; } @@ -1674,7 +1674,7 @@ static int graft_tree(struct vfsmount *mnt, struct path *path) if (d_unlinked(path->dentry)) return -ENOENT; - return attach_recursive_mnt(mnt, path, NULL); + return attach_recursive_mnt(real_mount(mnt), path, NULL); } /* @@ -1859,6 +1859,7 @@ static int do_move_mount(struct path *path, char *old_name) { struct path old_path, parent_path; struct vfsmount *p; + struct mount *old; int err = 0; if (!capable(CAP_SYS_ADMIN)) return -EPERM; @@ -1883,6 +1884,8 @@ static int do_move_mount(struct path *path, char *old_name) if (old_path.dentry != old_path.mnt->mnt_root) goto out1; + old = real_mount(old_path.mnt); + if (!mnt_has_parent(old_path.mnt)) goto out1; @@ -1906,7 +1909,7 @@ static int do_move_mount(struct path *path, char *old_name) if (p == old_path.mnt) goto out1; - err = attach_recursive_mnt(old_path.mnt, path, &parent_path); + err = attach_recursive_mnt(old, path, &parent_path); if (err) goto out1; |