diff options
author | Jakub Kicinski <jakub.kicinski@netronome.com> | 2017-12-28 05:39:08 +0300 |
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committer | Daniel Borkmann <daniel@iogearbox.net> | 2017-12-31 18:12:23 +0300 |
commit | cdab6ba8668d68f031bfd5d237b4586ec4f8cd88 (patch) | |
tree | 8e996972f0cfbccd3334d7e12490c5d5cbdb2d24 /fs/nsfs.c | |
parent | ad8ad79f4f6078f456792f7f8d344da2be9bc74f (diff) | |
download | linux-cdab6ba8668d68f031bfd5d237b4586ec4f8cd88.tar.xz |
nsfs: generalize ns_get_path() for path resolution with a task
ns_get_path() takes struct task_struct and proc_ns_ops as its
parameters. For path resolution directly from a namespace,
e.g. based on a networking device's net name space, we need
more flexibility. Add a ns_get_path_cb() helper which will
allow callers to use any method of obtaining the name space
reference. Convert ns_get_path() to use ns_get_path_cb().
Following patches will bring a networking user.
CC: Eric W. Biederman <ebiederm@xmission.com>
Suggested-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'fs/nsfs.c')
-rw-r--r-- | fs/nsfs.c | 29 |
1 files changed, 26 insertions, 3 deletions
diff --git a/fs/nsfs.c b/fs/nsfs.c index 7c6f76d29f56..36b0772701a0 100644 --- a/fs/nsfs.c +++ b/fs/nsfs.c @@ -103,14 +103,14 @@ slow: goto got_it; } -void *ns_get_path(struct path *path, struct task_struct *task, - const struct proc_ns_operations *ns_ops) +void *ns_get_path_cb(struct path *path, ns_get_path_helper_t *ns_get_cb, + void *private_data) { struct ns_common *ns; void *ret; again: - ns = ns_ops->get(task); + ns = ns_get_cb(private_data); if (!ns) return ERR_PTR(-ENOENT); @@ -120,6 +120,29 @@ again: return ret; } +struct ns_get_path_task_args { + const struct proc_ns_operations *ns_ops; + struct task_struct *task; +}; + +static struct ns_common *ns_get_path_task(void *private_data) +{ + struct ns_get_path_task_args *args = private_data; + + return args->ns_ops->get(args->task); +} + +void *ns_get_path(struct path *path, struct task_struct *task, + const struct proc_ns_operations *ns_ops) +{ + struct ns_get_path_task_args args = { + .ns_ops = ns_ops, + .task = task, + }; + + return ns_get_path_cb(path, ns_get_path_task, &args); +} + int open_related_ns(struct ns_common *ns, struct ns_common *(*get_ns)(struct ns_common *ns)) { |