Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* scm.c - Socket level control messages processing. |
| 2 | * |
| 3 | * Author: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> |
| 4 | * Alignment and value checking mods by Craig Metz |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License |
| 8 | * as published by the Free Software Foundation; either version |
| 9 | * 2 of the License, or (at your option) any later version. |
| 10 | */ |
| 11 | |
| 12 | #include <linux/module.h> |
| 13 | #include <linux/signal.h> |
Randy Dunlap | 4fc268d | 2006-01-11 12:17:47 -0800 | [diff] [blame] | 14 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | #include <linux/errno.h> |
| 16 | #include <linux/sched.h> |
| 17 | #include <linux/mm.h> |
| 18 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | #include <linux/stat.h> |
| 20 | #include <linux/socket.h> |
| 21 | #include <linux/file.h> |
| 22 | #include <linux/fcntl.h> |
| 23 | #include <linux/net.h> |
| 24 | #include <linux/interrupt.h> |
| 25 | #include <linux/netdevice.h> |
| 26 | #include <linux/security.h> |
Eric W. Biederman | 92f28d9 | 2013-03-15 01:03:33 -0700 | [diff] [blame] | 27 | #include <linux/pid_namespace.h> |
Pavel Emelyanov | b488893 | 2007-10-18 23:40:14 -0700 | [diff] [blame] | 28 | #include <linux/pid.h> |
| 29 | #include <linux/nsproxy.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 30 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #include <asm/uaccess.h> |
| 33 | |
| 34 | #include <net/protocol.h> |
| 35 | #include <linux/skbuff.h> |
| 36 | #include <net/sock.h> |
| 37 | #include <net/compat.h> |
| 38 | #include <net/scm.h> |
Daniel Wagner | d842950 | 2013-01-21 21:09:00 +0000 | [diff] [blame] | 39 | #include <net/cls_cgroup.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | |
| 41 | |
| 42 | /* |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 43 | * Only allow a user to send credentials, that they could set with |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | * setu(g)id. |
| 45 | */ |
| 46 | |
| 47 | static __inline__ int scm_check_creds(struct ucred *creds) |
| 48 | { |
David Howells | 86a264a | 2008-11-14 10:39:18 +1100 | [diff] [blame] | 49 | const struct cred *cred = current_cred(); |
Eric W. Biederman | b2e4f54 | 2012-05-23 16:39:45 -0600 | [diff] [blame] | 50 | kuid_t uid = make_kuid(cred->user_ns, creds->uid); |
| 51 | kgid_t gid = make_kgid(cred->user_ns, creds->gid); |
| 52 | |
| 53 | if (!uid_valid(uid) || !gid_valid(gid)) |
| 54 | return -EINVAL; |
David Howells | b6dff3e | 2008-11-14 10:39:16 +1100 | [diff] [blame] | 55 | |
Eric W. Biederman | 92f28d9 | 2013-03-15 01:03:33 -0700 | [diff] [blame] | 56 | if ((creds->pid == task_tgid_vnr(current) || |
Andy Lutomirski | d661684 | 2013-08-22 11:39:15 -0700 | [diff] [blame] | 57 | ns_capable(task_active_pid_ns(current)->user_ns, CAP_SYS_ADMIN)) && |
Eric W. Biederman | b2e4f54 | 2012-05-23 16:39:45 -0600 | [diff] [blame] | 58 | ((uid_eq(uid, cred->uid) || uid_eq(uid, cred->euid) || |
Eric W. Biederman | c7b96ac | 2013-03-20 12:49:49 -0700 | [diff] [blame] | 59 | uid_eq(uid, cred->suid)) || ns_capable(cred->user_ns, CAP_SETUID)) && |
Eric W. Biederman | b2e4f54 | 2012-05-23 16:39:45 -0600 | [diff] [blame] | 60 | ((gid_eq(gid, cred->gid) || gid_eq(gid, cred->egid) || |
Eric W. Biederman | c7b96ac | 2013-03-20 12:49:49 -0700 | [diff] [blame] | 61 | gid_eq(gid, cred->sgid)) || ns_capable(cred->user_ns, CAP_SETGID))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | return 0; |
| 63 | } |
| 64 | return -EPERM; |
| 65 | } |
| 66 | |
| 67 | static int scm_fp_copy(struct cmsghdr *cmsg, struct scm_fp_list **fplp) |
| 68 | { |
| 69 | int *fdp = (int*)CMSG_DATA(cmsg); |
| 70 | struct scm_fp_list *fpl = *fplp; |
| 71 | struct file **fpp; |
| 72 | int i, num; |
| 73 | |
| 74 | num = (cmsg->cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr)))/sizeof(int); |
| 75 | |
| 76 | if (num <= 0) |
| 77 | return 0; |
| 78 | |
| 79 | if (num > SCM_MAX_FD) |
| 80 | return -EINVAL; |
| 81 | |
| 82 | if (!fpl) |
| 83 | { |
| 84 | fpl = kmalloc(sizeof(struct scm_fp_list), GFP_KERNEL); |
| 85 | if (!fpl) |
| 86 | return -ENOMEM; |
| 87 | *fplp = fpl; |
| 88 | fpl->count = 0; |
Eric Dumazet | bba14de | 2010-11-23 14:09:15 +0000 | [diff] [blame] | 89 | fpl->max = SCM_MAX_FD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | } |
| 91 | fpp = &fpl->fp[fpl->count]; |
| 92 | |
Eric Dumazet | bba14de | 2010-11-23 14:09:15 +0000 | [diff] [blame] | 93 | if (fpl->count + num > fpl->max) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | return -EINVAL; |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 95 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | /* |
| 97 | * Verify the descriptors and increment the usage count. |
| 98 | */ |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 99 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | for (i=0; i< num; i++) |
| 101 | { |
| 102 | int fd = fdp[i]; |
| 103 | struct file *file; |
| 104 | |
Al Viro | 326be7b | 2011-03-13 17:08:22 -0400 | [diff] [blame] | 105 | if (fd < 0 || !(file = fget_raw(fd))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | return -EBADF; |
| 107 | *fpp++ = file; |
| 108 | fpl->count++; |
| 109 | } |
| 110 | return num; |
| 111 | } |
| 112 | |
| 113 | void __scm_destroy(struct scm_cookie *scm) |
| 114 | { |
| 115 | struct scm_fp_list *fpl = scm->fp; |
| 116 | int i; |
| 117 | |
| 118 | if (fpl) { |
| 119 | scm->fp = NULL; |
Al Viro | 6120d3d | 2012-06-24 10:03:05 +0400 | [diff] [blame] | 120 | for (i=fpl->count-1; i>=0; i--) |
| 121 | fput(fpl->fp[i]); |
| 122 | kfree(fpl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | } |
| 124 | } |
Eric Dumazet | 9e34a5b | 2010-07-09 21:22:04 +0000 | [diff] [blame] | 125 | EXPORT_SYMBOL(__scm_destroy); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | |
| 127 | int __scm_send(struct socket *sock, struct msghdr *msg, struct scm_cookie *p) |
| 128 | { |
| 129 | struct cmsghdr *cmsg; |
| 130 | int err; |
| 131 | |
Gu Zheng | f95b414 | 2014-12-11 11:22:04 +0800 | [diff] [blame] | 132 | for_each_cmsghdr(cmsg, msg) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | err = -EINVAL; |
| 134 | |
| 135 | /* Verify that cmsg_len is at least sizeof(struct cmsghdr) */ |
| 136 | /* The first check was omitted in <= 2.2.5. The reasoning was |
| 137 | that parser checks cmsg_len in any case, so that |
| 138 | additional check would be work duplication. |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 139 | But if cmsg_level is not SOL_SOCKET, we do not check |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | for too short ancillary data object at all! Oops. |
| 141 | OK, let's add it... |
| 142 | */ |
| 143 | if (!CMSG_OK(msg, cmsg)) |
| 144 | goto error; |
| 145 | |
| 146 | if (cmsg->cmsg_level != SOL_SOCKET) |
| 147 | continue; |
| 148 | |
| 149 | switch (cmsg->cmsg_type) |
| 150 | { |
| 151 | case SCM_RIGHTS: |
Eric W. Biederman | 76dadd76 | 2010-02-28 01:20:36 +0000 | [diff] [blame] | 152 | if (!sock->ops || sock->ops->family != PF_UNIX) |
| 153 | goto error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | err=scm_fp_copy(cmsg, &p->fp); |
| 155 | if (err<0) |
| 156 | goto error; |
| 157 | break; |
| 158 | case SCM_CREDENTIALS: |
Eric W. Biederman | b2e4f54 | 2012-05-23 16:39:45 -0600 | [diff] [blame] | 159 | { |
Eric W. Biederman | dbe9a41 | 2012-09-06 18:20:01 +0000 | [diff] [blame] | 160 | struct ucred creds; |
Eric W. Biederman | b2e4f54 | 2012-05-23 16:39:45 -0600 | [diff] [blame] | 161 | kuid_t uid; |
| 162 | kgid_t gid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | if (cmsg->cmsg_len != CMSG_LEN(sizeof(struct ucred))) |
| 164 | goto error; |
Eric W. Biederman | dbe9a41 | 2012-09-06 18:20:01 +0000 | [diff] [blame] | 165 | memcpy(&creds, CMSG_DATA(cmsg), sizeof(struct ucred)); |
| 166 | err = scm_check_creds(&creds); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | if (err) |
| 168 | goto error; |
Eric W. Biederman | 257b535 | 2010-06-13 03:32:34 +0000 | [diff] [blame] | 169 | |
Eric W. Biederman | dbe9a41 | 2012-09-06 18:20:01 +0000 | [diff] [blame] | 170 | p->creds.pid = creds.pid; |
| 171 | if (!p->pid || pid_vnr(p->pid) != creds.pid) { |
Eric W. Biederman | 257b535 | 2010-06-13 03:32:34 +0000 | [diff] [blame] | 172 | struct pid *pid; |
| 173 | err = -ESRCH; |
Eric W. Biederman | dbe9a41 | 2012-09-06 18:20:01 +0000 | [diff] [blame] | 174 | pid = find_get_pid(creds.pid); |
Eric W. Biederman | 257b535 | 2010-06-13 03:32:34 +0000 | [diff] [blame] | 175 | if (!pid) |
| 176 | goto error; |
| 177 | put_pid(p->pid); |
| 178 | p->pid = pid; |
| 179 | } |
| 180 | |
Eric W. Biederman | b2e4f54 | 2012-05-23 16:39:45 -0600 | [diff] [blame] | 181 | err = -EINVAL; |
Eric W. Biederman | dbe9a41 | 2012-09-06 18:20:01 +0000 | [diff] [blame] | 182 | uid = make_kuid(current_user_ns(), creds.uid); |
| 183 | gid = make_kgid(current_user_ns(), creds.gid); |
Eric W. Biederman | b2e4f54 | 2012-05-23 16:39:45 -0600 | [diff] [blame] | 184 | if (!uid_valid(uid) || !gid_valid(gid)) |
| 185 | goto error; |
| 186 | |
Eric W. Biederman | dbe9a41 | 2012-09-06 18:20:01 +0000 | [diff] [blame] | 187 | p->creds.uid = uid; |
| 188 | p->creds.gid = gid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | break; |
Eric W. Biederman | b2e4f54 | 2012-05-23 16:39:45 -0600 | [diff] [blame] | 190 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | default: |
| 192 | goto error; |
| 193 | } |
| 194 | } |
| 195 | |
| 196 | if (p->fp && !p->fp->count) |
| 197 | { |
| 198 | kfree(p->fp); |
| 199 | p->fp = NULL; |
| 200 | } |
| 201 | return 0; |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 202 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | error: |
| 204 | scm_destroy(p); |
| 205 | return err; |
| 206 | } |
Eric Dumazet | 9e34a5b | 2010-07-09 21:22:04 +0000 | [diff] [blame] | 207 | EXPORT_SYMBOL(__scm_send); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | |
| 209 | int put_cmsg(struct msghdr * msg, int level, int type, int len, void *data) |
| 210 | { |
Stephen Hemminger | cfcabdc | 2007-10-09 01:59:42 -0700 | [diff] [blame] | 211 | struct cmsghdr __user *cm |
| 212 | = (__force struct cmsghdr __user *)msg->msg_control; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | struct cmsghdr cmhdr; |
| 214 | int cmlen = CMSG_LEN(len); |
| 215 | int err; |
| 216 | |
| 217 | if (MSG_CMSG_COMPAT & msg->msg_flags) |
| 218 | return put_cmsg_compat(msg, level, type, len, data); |
| 219 | |
| 220 | if (cm==NULL || msg->msg_controllen < sizeof(*cm)) { |
| 221 | msg->msg_flags |= MSG_CTRUNC; |
| 222 | return 0; /* XXX: return error? check spec. */ |
| 223 | } |
| 224 | if (msg->msg_controllen < cmlen) { |
| 225 | msg->msg_flags |= MSG_CTRUNC; |
| 226 | cmlen = msg->msg_controllen; |
| 227 | } |
| 228 | cmhdr.cmsg_level = level; |
| 229 | cmhdr.cmsg_type = type; |
| 230 | cmhdr.cmsg_len = cmlen; |
| 231 | |
| 232 | err = -EFAULT; |
| 233 | if (copy_to_user(cm, &cmhdr, sizeof cmhdr)) |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 234 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | if (copy_to_user(CMSG_DATA(cm), data, cmlen - sizeof(struct cmsghdr))) |
| 236 | goto out; |
| 237 | cmlen = CMSG_SPACE(len); |
Wei Yongjun | 1ac70e7 | 2007-12-20 14:36:44 -0800 | [diff] [blame] | 238 | if (msg->msg_controllen < cmlen) |
| 239 | cmlen = msg->msg_controllen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | msg->msg_control += cmlen; |
| 241 | msg->msg_controllen -= cmlen; |
| 242 | err = 0; |
| 243 | out: |
| 244 | return err; |
| 245 | } |
Eric Dumazet | 9e34a5b | 2010-07-09 21:22:04 +0000 | [diff] [blame] | 246 | EXPORT_SYMBOL(put_cmsg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | |
| 248 | void scm_detach_fds(struct msghdr *msg, struct scm_cookie *scm) |
| 249 | { |
Stephen Hemminger | cfcabdc | 2007-10-09 01:59:42 -0700 | [diff] [blame] | 250 | struct cmsghdr __user *cm |
| 251 | = (__force struct cmsghdr __user*)msg->msg_control; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | |
| 253 | int fdmax = 0; |
| 254 | int fdnum = scm->fp->count; |
| 255 | struct file **fp = scm->fp->fp; |
| 256 | int __user *cmfptr; |
| 257 | int err = 0, i; |
| 258 | |
| 259 | if (MSG_CMSG_COMPAT & msg->msg_flags) { |
| 260 | scm_detach_fds_compat(msg, scm); |
| 261 | return; |
| 262 | } |
| 263 | |
| 264 | if (msg->msg_controllen > sizeof(struct cmsghdr)) |
| 265 | fdmax = ((msg->msg_controllen - sizeof(struct cmsghdr)) |
| 266 | / sizeof(int)); |
| 267 | |
| 268 | if (fdnum < fdmax) |
| 269 | fdmax = fdnum; |
| 270 | |
Stephen Hemminger | cfcabdc | 2007-10-09 01:59:42 -0700 | [diff] [blame] | 271 | for (i=0, cmfptr=(__force int __user *)CMSG_DATA(cm); i<fdmax; |
| 272 | i++, cmfptr++) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | { |
John Fastabend | 48a87cc | 2012-08-14 12:34:30 +0000 | [diff] [blame] | 274 | struct socket *sock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | int new_fd; |
| 276 | err = security_file_receive(fp[i]); |
| 277 | if (err) |
| 278 | break; |
Ulrich Drepper | 4a19542 | 2007-07-15 23:40:34 -0700 | [diff] [blame] | 279 | err = get_unused_fd_flags(MSG_CMSG_CLOEXEC & msg->msg_flags |
| 280 | ? O_CLOEXEC : 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | if (err < 0) |
| 282 | break; |
| 283 | new_fd = err; |
| 284 | err = put_user(new_fd, cmfptr); |
| 285 | if (err) { |
| 286 | put_unused_fd(new_fd); |
| 287 | break; |
| 288 | } |
| 289 | /* Bump the usage count and install the file. */ |
John Fastabend | 48a87cc | 2012-08-14 12:34:30 +0000 | [diff] [blame] | 290 | sock = sock_from_file(fp[i], &err); |
Daniel Wagner | d842950 | 2013-01-21 21:09:00 +0000 | [diff] [blame] | 291 | if (sock) { |
Zefan Li | 6ffd464 | 2013-04-08 20:03:47 +0000 | [diff] [blame] | 292 | sock_update_netprioidx(sock->sk); |
Zefan Li | 211d2f97 | 2013-04-08 20:03:35 +0000 | [diff] [blame] | 293 | sock_update_classid(sock->sk); |
Daniel Wagner | d842950 | 2013-01-21 21:09:00 +0000 | [diff] [blame] | 294 | } |
Al Viro | cb0942b | 2012-08-27 14:48:26 -0400 | [diff] [blame] | 295 | fd_install(new_fd, get_file(fp[i])); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | } |
| 297 | |
| 298 | if (i > 0) |
| 299 | { |
| 300 | int cmlen = CMSG_LEN(i*sizeof(int)); |
Miklos Szeredi | effee6a | 2006-10-09 21:42:14 -0700 | [diff] [blame] | 301 | err = put_user(SOL_SOCKET, &cm->cmsg_level); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | if (!err) |
| 303 | err = put_user(SCM_RIGHTS, &cm->cmsg_type); |
| 304 | if (!err) |
| 305 | err = put_user(cmlen, &cm->cmsg_len); |
| 306 | if (!err) { |
| 307 | cmlen = CMSG_SPACE(i*sizeof(int)); |
Daniel Borkmann | 6900317 | 2015-11-20 00:11:56 +0100 | [diff] [blame] | 308 | if (msg->msg_controllen < cmlen) |
| 309 | cmlen = msg->msg_controllen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | msg->msg_control += cmlen; |
| 311 | msg->msg_controllen -= cmlen; |
| 312 | } |
| 313 | } |
| 314 | if (i < fdnum || (fdnum && fdmax <= 0)) |
| 315 | msg->msg_flags |= MSG_CTRUNC; |
| 316 | |
| 317 | /* |
| 318 | * All of the files that fit in the message have had their |
| 319 | * usage counts incremented, so we just free the list. |
| 320 | */ |
| 321 | __scm_destroy(scm); |
| 322 | } |
Eric Dumazet | 9e34a5b | 2010-07-09 21:22:04 +0000 | [diff] [blame] | 323 | EXPORT_SYMBOL(scm_detach_fds); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | |
| 325 | struct scm_fp_list *scm_fp_dup(struct scm_fp_list *fpl) |
| 326 | { |
| 327 | struct scm_fp_list *new_fpl; |
| 328 | int i; |
| 329 | |
| 330 | if (!fpl) |
| 331 | return NULL; |
| 332 | |
Eric Dumazet | bba14de | 2010-11-23 14:09:15 +0000 | [diff] [blame] | 333 | new_fpl = kmemdup(fpl, offsetof(struct scm_fp_list, fp[fpl->count]), |
| 334 | GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | if (new_fpl) { |
Eric Dumazet | bba14de | 2010-11-23 14:09:15 +0000 | [diff] [blame] | 336 | for (i = 0; i < fpl->count; i++) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | get_file(fpl->fp[i]); |
Eric Dumazet | bba14de | 2010-11-23 14:09:15 +0000 | [diff] [blame] | 338 | new_fpl->max = new_fpl->count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | } |
| 340 | return new_fpl; |
| 341 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | EXPORT_SYMBOL(scm_fp_dup); |