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5890f504ef
Add ns_debug() that asserts that the correct operations are used for the namespace type. Reviewed-by: Jan Kara <jack@suse.cz> Signed-off-by: Christian Brauner <brauner@kernel.org>
78 lines
1.5 KiB
C
78 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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#include <linux/ns_common.h>
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#include <linux/proc_ns.h>
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#include <linux/vfsdebug.h>
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#ifdef CONFIG_DEBUG_VFS
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static void ns_debug(struct ns_common *ns, const struct proc_ns_operations *ops)
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{
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switch (ns->ops->type) {
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#ifdef CONFIG_CGROUPS
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case CLONE_NEWCGROUP:
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VFS_WARN_ON_ONCE(ops != &cgroupns_operations);
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break;
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#endif
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#ifdef CONFIG_IPC_NS
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case CLONE_NEWIPC:
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VFS_WARN_ON_ONCE(ops != &ipcns_operations);
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break;
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#endif
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case CLONE_NEWNS:
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VFS_WARN_ON_ONCE(ops != &mntns_operations);
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break;
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#ifdef CONFIG_NET_NS
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case CLONE_NEWNET:
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VFS_WARN_ON_ONCE(ops != &netns_operations);
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break;
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#endif
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#ifdef CONFIG_PID_NS
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case CLONE_NEWPID:
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VFS_WARN_ON_ONCE(ops != &pidns_operations);
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break;
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#endif
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#ifdef CONFIG_TIME_NS
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case CLONE_NEWTIME:
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VFS_WARN_ON_ONCE(ops != &timens_operations);
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break;
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#endif
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#ifdef CONFIG_USER_NS
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case CLONE_NEWUSER:
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VFS_WARN_ON_ONCE(ops != &userns_operations);
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break;
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#endif
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#ifdef CONFIG_UTS_NS
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case CLONE_NEWUTS:
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VFS_WARN_ON_ONCE(ops != &utsns_operations);
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break;
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#endif
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default:
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VFS_WARN_ON_ONCE(true);
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}
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}
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#endif
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int __ns_common_init(struct ns_common *ns, const struct proc_ns_operations *ops, int inum)
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{
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refcount_set(&ns->__ns_ref, 1);
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ns->stashed = NULL;
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ns->ops = ops;
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ns->ns_id = 0;
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RB_CLEAR_NODE(&ns->ns_tree_node);
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INIT_LIST_HEAD(&ns->ns_list_node);
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#ifdef CONFIG_DEBUG_VFS
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ns_debug(ns, ops);
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#endif
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if (inum) {
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ns->inum = inum;
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return 0;
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}
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return proc_alloc_inum(&ns->inum);
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}
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void __ns_common_free(struct ns_common *ns)
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{
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proc_free_inum(ns->inum);
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}
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