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authorEric W. Biederman <ebiederm@xmission.com>2012-02-07 16:18:52 -0800
committerEric W. Biederman <ebiederm@xmission.com>2012-11-14 22:05:32 -0800
commit45634cd8cb6541523227753944c7417ac3d20f94 (patch)
treebb54e7acb675feb089b6b7d28d58e94feee71d9d /fs/autofs4/autofs_i.h
parentLinux 3.7-rc3 (diff)
downloadlinux-dev-45634cd8cb6541523227753944c7417ac3d20f94.tar.xz
linux-dev-45634cd8cb6541523227753944c7417ac3d20f94.zip
userns: Support autofs4 interacing with multiple user namespaces
Use kuid_t and kgid_t in struct autofs_info and struct autofs_wait_queue. When creating directories and symlinks default the uid and gid of the mount requester to the global root uid and gid. autofs4_wait will update these fields when a mount is requested. When generating autofsv5 packets report the uid and gid of the mount requestor in user namespace of the process that opened the pipe, reporting unmapped uids and gids as overflowuid and overflowgid. In autofs_dev_ioctl_requester return the uid and gid of the last mount requester converted into the calling processes user namespace. When the uid or gid don't map return overflowuid and overflowgid as appropriate, allowing failure to find a mount requester to be distinguished from failure to map a mount requester. The uid and gid mount options specifying the user and group of the root autofs inode are converted into kuid and kgid as they are parsed defaulting to the current uid and current gid of the process that mounts autofs. Mounting of autofs for the present remains confined to processes in the initial user namespace. Cc: Ian Kent <raven@themaw.net> Acked-by: Serge Hallyn <serge.hallyn@canonical.com> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Diffstat (limited to 'fs/autofs4/autofs_i.h')
-rw-r--r--fs/autofs4/autofs_i.h8
1 files changed, 4 insertions, 4 deletions
diff --git a/fs/autofs4/autofs_i.h b/fs/autofs4/autofs_i.h
index 908e18455413..b785e7707959 100644
--- a/fs/autofs4/autofs_i.h
+++ b/fs/autofs4/autofs_i.h
@@ -74,8 +74,8 @@ struct autofs_info {
unsigned long last_used;
atomic_t count;
- uid_t uid;
- gid_t gid;
+ kuid_t uid;
+ kgid_t gid;
};
#define AUTOFS_INF_EXPIRING (1<<0) /* dentry is in the process of expiring */
@@ -89,8 +89,8 @@ struct autofs_wait_queue {
struct qstr name;
u32 dev;
u64 ino;
- uid_t uid;
- gid_t gid;
+ kuid_t uid;
+ kgid_t gid;
pid_t pid;
pid_t tgid;
/* This is for status reporting upon return */