4 * Kernel compatibililty routines for e.g. 32 bit syscall support
7 * Copyright (C) 2002 Stephen Rothwell, IBM Corporation
8 * Copyright (C) 1997-2000 Jakub Jelinek (jakub@redhat.com)
9 * Copyright (C) 1998 Eddie C. Dost (ecd@skynet.be)
10 * Copyright (C) 2001,2002 Andi Kleen, SuSE Labs
11 * Copyright (C) 2003 Pavel Machek (pavel@suse.cz)
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License version 2 as
15 * published by the Free Software Foundation.
18 #include <linux/kernel.h>
19 #include <linux/linkage.h>
20 #include <linux/compat.h>
21 #include <linux/errno.h>
22 #include <linux/time.h>
24 #include <linux/fcntl.h>
25 #include <linux/namei.h>
26 #include <linux/file.h>
27 #include <linux/vfs.h>
28 #include <linux/ioctl32.h>
29 #include <linux/ioctl.h>
30 #include <linux/init.h>
31 #include <linux/sockios.h> /* for SIOCDEVPRIVATE */
32 #include <linux/smb.h>
33 #include <linux/smb_mount.h>
34 #include <linux/ncp_mount.h>
35 #include <linux/nfs4_mount.h>
36 #include <linux/smp_lock.h>
37 #include <linux/syscalls.h>
38 #include <linux/ctype.h>
39 #include <linux/module.h>
40 #include <linux/dirent.h>
41 #include <linux/fsnotify.h>
42 #include <linux/highuid.h>
43 #include <linux/sunrpc/svc.h>
44 #include <linux/nfsd/nfsd.h>
45 #include <linux/nfsd/syscall.h>
46 #include <linux/personality.h>
47 #include <linux/rwsem.h>
48 #include <linux/tsacct_kern.h>
49 #include <linux/highmem.h>
50 #include <linux/poll.h>
52 #include <linux/eventpoll.h>
54 #include <net/sock.h> /* siocdevprivate_ioctl */
56 #include <asm/uaccess.h>
57 #include <asm/mmu_context.h>
58 #include <asm/ioctls.h>
63 int compat_printk(const char *fmt, ...)
70 ret = vprintk(fmt, ap);
75 #include "read_write.h"
78 * Not all architectures have sys_utime, so implement this in terms
81 asmlinkage long compat_sys_utime(char __user *filename, struct compat_utimbuf __user *t)
86 if (get_user(tv[0].tv_sec, &t->actime) ||
87 get_user(tv[1].tv_sec, &t->modtime))
92 return do_utimes(AT_FDCWD, filename, t ? tv : NULL);
95 asmlinkage long compat_sys_futimesat(unsigned int dfd, char __user *filename, struct compat_timeval __user *t)
100 if (get_user(tv[0].tv_sec, &t[0].tv_sec) ||
101 get_user(tv[0].tv_usec, &t[0].tv_usec) ||
102 get_user(tv[1].tv_sec, &t[1].tv_sec) ||
103 get_user(tv[1].tv_usec, &t[1].tv_usec))
106 return do_utimes(dfd, filename, t ? tv : NULL);
109 asmlinkage long compat_sys_utimes(char __user *filename, struct compat_timeval __user *t)
111 return compat_sys_futimesat(AT_FDCWD, filename, t);
114 asmlinkage long compat_sys_newstat(char __user * filename,
115 struct compat_stat __user *statbuf)
118 int error = vfs_stat_fd(AT_FDCWD, filename, &stat);
121 error = cp_compat_stat(&stat, statbuf);
125 asmlinkage long compat_sys_newlstat(char __user * filename,
126 struct compat_stat __user *statbuf)
129 int error = vfs_lstat_fd(AT_FDCWD, filename, &stat);
132 error = cp_compat_stat(&stat, statbuf);
136 #ifndef __ARCH_WANT_STAT64
137 asmlinkage long compat_sys_newfstatat(unsigned int dfd, char __user *filename,
138 struct compat_stat __user *statbuf, int flag)
143 if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
146 if (flag & AT_SYMLINK_NOFOLLOW)
147 error = vfs_lstat_fd(dfd, filename, &stat);
149 error = vfs_stat_fd(dfd, filename, &stat);
152 error = cp_compat_stat(&stat, statbuf);
159 asmlinkage long compat_sys_newfstat(unsigned int fd,
160 struct compat_stat __user * statbuf)
163 int error = vfs_fstat(fd, &stat);
166 error = cp_compat_stat(&stat, statbuf);
170 static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *kbuf)
173 if (sizeof ubuf->f_blocks == 4) {
174 if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail) &
175 0xffffffff00000000ULL)
177 /* f_files and f_ffree may be -1; it's okay
178 * to stuff that into 32 bits */
179 if (kbuf->f_files != 0xffffffffffffffffULL
180 && (kbuf->f_files & 0xffffffff00000000ULL))
182 if (kbuf->f_ffree != 0xffffffffffffffffULL
183 && (kbuf->f_ffree & 0xffffffff00000000ULL))
186 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
187 __put_user(kbuf->f_type, &ubuf->f_type) ||
188 __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
189 __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
190 __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
191 __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
192 __put_user(kbuf->f_files, &ubuf->f_files) ||
193 __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
194 __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
195 __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
196 __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
197 __put_user(kbuf->f_frsize, &ubuf->f_frsize) ||
198 __put_user(0, &ubuf->f_spare[0]) ||
199 __put_user(0, &ubuf->f_spare[1]) ||
200 __put_user(0, &ubuf->f_spare[2]) ||
201 __put_user(0, &ubuf->f_spare[3]) ||
202 __put_user(0, &ubuf->f_spare[4]))
208 * The following statfs calls are copies of code from fs/open.c and
209 * should be checked against those from time to time
211 asmlinkage long compat_sys_statfs(const char __user *path, struct compat_statfs __user *buf)
216 error = user_path_walk(path, &nd);
219 error = vfs_statfs(nd.dentry, &tmp);
221 error = put_compat_statfs(buf, &tmp);
227 asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user *buf)
237 error = vfs_statfs(file->f_path.dentry, &tmp);
239 error = put_compat_statfs(buf, &tmp);
245 static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf)
247 if (sizeof ubuf->f_blocks == 4) {
248 if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail) &
249 0xffffffff00000000ULL)
251 /* f_files and f_ffree may be -1; it's okay
252 * to stuff that into 32 bits */
253 if (kbuf->f_files != 0xffffffffffffffffULL
254 && (kbuf->f_files & 0xffffffff00000000ULL))
256 if (kbuf->f_ffree != 0xffffffffffffffffULL
257 && (kbuf->f_ffree & 0xffffffff00000000ULL))
260 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
261 __put_user(kbuf->f_type, &ubuf->f_type) ||
262 __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
263 __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
264 __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
265 __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
266 __put_user(kbuf->f_files, &ubuf->f_files) ||
267 __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
268 __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
269 __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
270 __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
271 __put_user(kbuf->f_frsize, &ubuf->f_frsize))
276 asmlinkage long compat_sys_statfs64(const char __user *path, compat_size_t sz, struct compat_statfs64 __user *buf)
281 if (sz != sizeof(*buf))
284 error = user_path_walk(path, &nd);
287 error = vfs_statfs(nd.dentry, &tmp);
289 error = put_compat_statfs64(buf, &tmp);
295 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, struct compat_statfs64 __user *buf)
301 if (sz != sizeof(*buf))
308 error = vfs_statfs(file->f_path.dentry, &tmp);
310 error = put_compat_statfs64(buf, &tmp);
316 /* ioctl32 stuff, used by sparc64, parisc, s390x, ppc64, x86_64, MIPS */
318 #define IOCTL_HASHSIZE 256
319 static struct ioctl_trans *ioctl32_hash_table[IOCTL_HASHSIZE];
321 static inline unsigned long ioctl32_hash(unsigned long cmd)
323 return (((cmd >> 6) ^ (cmd >> 4) ^ cmd)) % IOCTL_HASHSIZE;
326 static void ioctl32_insert_translation(struct ioctl_trans *trans)
329 struct ioctl_trans *t;
331 hash = ioctl32_hash (trans->cmd);
332 if (!ioctl32_hash_table[hash])
333 ioctl32_hash_table[hash] = trans;
335 t = ioctl32_hash_table[hash];
343 static int __init init_sys32_ioctl(void)
347 for (i = 0; i < ioctl_table_size; i++) {
348 if (ioctl_start[i].next != 0) {
349 printk("ioctl translation %d bad\n",i);
353 ioctl32_insert_translation(&ioctl_start[i]);
358 __initcall(init_sys32_ioctl);
360 static void compat_ioctl_error(struct file *filp, unsigned int fd,
361 unsigned int cmd, unsigned long arg)
367 /* find the name of the device. */
368 path = (char *)__get_free_page(GFP_KERNEL);
370 fn = d_path(filp->f_path.dentry, filp->f_path.mnt, path, PAGE_SIZE);
375 sprintf(buf,"'%c'", (cmd>>_IOC_TYPESHIFT) & _IOC_TYPEMASK);
376 if (!isprint(buf[1]))
377 sprintf(buf, "%02x", buf[1]);
378 compat_printk("ioctl32(%s:%d): Unknown cmd fd(%d) "
379 "cmd(%08x){t:%s;sz:%u} arg(%08x) on %s\n",
380 current->comm, current->pid,
381 (int)fd, (unsigned int)cmd, buf,
382 (cmd >> _IOC_SIZESHIFT) & _IOC_SIZEMASK,
383 (unsigned int)arg, fn);
386 free_page((unsigned long)path);
389 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
394 struct ioctl_trans *t;
397 filp = fget_light(fd, &fput_needed);
401 /* RED-PEN how should LSM module know it's handling 32bit? */
402 error = security_file_ioctl(filp, cmd, arg);
407 * To allow the compat_ioctl handlers to be self contained
408 * we need to check the common ioctls here first.
409 * Just handle them with the standard handlers below.
422 if (S_ISREG(filp->f_path.dentry->d_inode->i_mode))
427 if (filp->f_op && filp->f_op->compat_ioctl) {
428 error = filp->f_op->compat_ioctl(filp, cmd, arg);
429 if (error != -ENOIOCTLCMD)
434 (!filp->f_op->ioctl && !filp->f_op->unlocked_ioctl))
439 for (t = ioctl32_hash_table[ioctl32_hash(cmd)]; t; t = t->next) {
444 if (S_ISSOCK(filp->f_path.dentry->d_inode->i_mode) &&
445 cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) {
446 error = siocdevprivate_ioctl(fd, cmd, arg);
451 compat_ioctl_error(filp, fd, cmd, arg);
460 error = t->handler(fd, cmd, arg, filp);
466 error = vfs_ioctl(filp, fd, cmd, arg);
468 fput_light(filp, fput_needed);
473 static int get_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
475 if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
476 __get_user(kfl->l_type, &ufl->l_type) ||
477 __get_user(kfl->l_whence, &ufl->l_whence) ||
478 __get_user(kfl->l_start, &ufl->l_start) ||
479 __get_user(kfl->l_len, &ufl->l_len) ||
480 __get_user(kfl->l_pid, &ufl->l_pid))
485 static int put_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
487 if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
488 __put_user(kfl->l_type, &ufl->l_type) ||
489 __put_user(kfl->l_whence, &ufl->l_whence) ||
490 __put_user(kfl->l_start, &ufl->l_start) ||
491 __put_user(kfl->l_len, &ufl->l_len) ||
492 __put_user(kfl->l_pid, &ufl->l_pid))
497 #ifndef HAVE_ARCH_GET_COMPAT_FLOCK64
498 static int get_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
500 if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
501 __get_user(kfl->l_type, &ufl->l_type) ||
502 __get_user(kfl->l_whence, &ufl->l_whence) ||
503 __get_user(kfl->l_start, &ufl->l_start) ||
504 __get_user(kfl->l_len, &ufl->l_len) ||
505 __get_user(kfl->l_pid, &ufl->l_pid))
511 #ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64
512 static int put_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
514 if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
515 __put_user(kfl->l_type, &ufl->l_type) ||
516 __put_user(kfl->l_whence, &ufl->l_whence) ||
517 __put_user(kfl->l_start, &ufl->l_start) ||
518 __put_user(kfl->l_len, &ufl->l_len) ||
519 __put_user(kfl->l_pid, &ufl->l_pid))
525 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
536 ret = get_compat_flock(&f, compat_ptr(arg));
541 ret = sys_fcntl(fd, cmd, (unsigned long)&f);
543 if (cmd == F_GETLK && ret == 0) {
544 /* GETLK was successfule and we need to return the data...
545 * but it needs to fit in the compat structure.
546 * l_start shouldn't be too big, unless the original
547 * start + end is greater than COMPAT_OFF_T_MAX, in which
548 * case the app was asking for trouble, so we return
549 * -EOVERFLOW in that case.
550 * l_len could be too big, in which case we just truncate it,
551 * and only allow the app to see that part of the conflicting
552 * lock that might make sense to it anyway
555 if (f.l_start > COMPAT_OFF_T_MAX)
557 if (f.l_len > COMPAT_OFF_T_MAX)
558 f.l_len = COMPAT_OFF_T_MAX;
560 ret = put_compat_flock(&f, compat_ptr(arg));
567 ret = get_compat_flock64(&f, compat_ptr(arg));
572 ret = sys_fcntl(fd, (cmd == F_GETLK64) ? F_GETLK :
573 ((cmd == F_SETLK64) ? F_SETLK : F_SETLKW),
576 if (cmd == F_GETLK64 && ret == 0) {
577 /* need to return lock information - see above for commentary */
578 if (f.l_start > COMPAT_LOFF_T_MAX)
580 if (f.l_len > COMPAT_LOFF_T_MAX)
581 f.l_len = COMPAT_LOFF_T_MAX;
583 ret = put_compat_flock64(&f, compat_ptr(arg));
588 ret = sys_fcntl(fd, cmd, arg);
594 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
597 if ((cmd == F_GETLK64) || (cmd == F_SETLK64) || (cmd == F_SETLKW64))
599 return compat_sys_fcntl64(fd, cmd, arg);
603 compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p)
608 mm_segment_t oldfs = get_fs();
609 if (unlikely(get_user(ctx64, ctx32p)))
613 /* The __user pointer cast is valid because of the set_fs() */
614 ret = sys_io_setup(nr_reqs, (aio_context_t __user *) &ctx64);
616 /* truncating is ok because it's a user address */
618 ret = put_user((u32) ctx64, ctx32p);
623 compat_sys_io_getevents(aio_context_t ctx_id,
624 unsigned long min_nr,
626 struct io_event __user *events,
627 struct compat_timespec __user *timeout)
631 struct timespec __user *ut = NULL;
634 if (unlikely(!access_ok(VERIFY_WRITE, events,
635 nr * sizeof(struct io_event))))
638 if (get_compat_timespec(&t, timeout))
641 ut = compat_alloc_user_space(sizeof(*ut));
642 if (copy_to_user(ut, &t, sizeof(t)) )
645 ret = sys_io_getevents(ctx_id, min_nr, nr, events, ut);
651 copy_iocb(long nr, u32 __user *ptr32, struct iocb __user * __user *ptr64)
656 for (i = 0; i < nr; ++i) {
657 if (get_user(uptr, ptr32 + i))
659 if (put_user(compat_ptr(uptr), ptr64 + i))
665 #define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *))
668 compat_sys_io_submit(aio_context_t ctx_id, int nr, u32 __user *iocb)
670 struct iocb __user * __user *iocb64;
673 if (unlikely(nr < 0))
676 if (nr > MAX_AIO_SUBMITS)
677 nr = MAX_AIO_SUBMITS;
679 iocb64 = compat_alloc_user_space(nr * sizeof(*iocb64));
680 ret = copy_iocb(nr, iocb, iocb64);
682 ret = sys_io_submit(ctx_id, nr, iocb64);
686 struct compat_ncp_mount_data {
687 compat_int_t version;
688 compat_uint_t ncp_fd;
689 __compat_uid_t mounted_uid;
690 compat_pid_t wdog_pid;
691 unsigned char mounted_vol[NCP_VOLNAME_LEN + 1];
692 compat_uint_t time_out;
693 compat_uint_t retry_count;
697 compat_mode_t file_mode;
698 compat_mode_t dir_mode;
701 struct compat_ncp_mount_data_v4 {
702 compat_int_t version;
703 compat_ulong_t flags;
704 compat_ulong_t mounted_uid;
705 compat_long_t wdog_pid;
706 compat_uint_t ncp_fd;
707 compat_uint_t time_out;
708 compat_uint_t retry_count;
711 compat_ulong_t file_mode;
712 compat_ulong_t dir_mode;
715 static void *do_ncp_super_data_conv(void *raw_data)
717 int version = *(unsigned int *)raw_data;
720 struct compat_ncp_mount_data *c_n = raw_data;
721 struct ncp_mount_data *n = raw_data;
723 n->dir_mode = c_n->dir_mode;
724 n->file_mode = c_n->file_mode;
727 memmove (n->mounted_vol, c_n->mounted_vol, (sizeof (c_n->mounted_vol) + 3 * sizeof (unsigned int)));
728 n->wdog_pid = c_n->wdog_pid;
729 n->mounted_uid = c_n->mounted_uid;
730 } else if (version == 4) {
731 struct compat_ncp_mount_data_v4 *c_n = raw_data;
732 struct ncp_mount_data_v4 *n = raw_data;
734 n->dir_mode = c_n->dir_mode;
735 n->file_mode = c_n->file_mode;
738 n->retry_count = c_n->retry_count;
739 n->time_out = c_n->time_out;
740 n->ncp_fd = c_n->ncp_fd;
741 n->wdog_pid = c_n->wdog_pid;
742 n->mounted_uid = c_n->mounted_uid;
743 n->flags = c_n->flags;
744 } else if (version != 5) {
751 struct compat_smb_mount_data {
752 compat_int_t version;
753 __compat_uid_t mounted_uid;
756 compat_mode_t file_mode;
757 compat_mode_t dir_mode;
760 static void *do_smb_super_data_conv(void *raw_data)
762 struct smb_mount_data *s = raw_data;
763 struct compat_smb_mount_data *c_s = raw_data;
765 if (c_s->version != SMB_MOUNT_OLDVERSION)
767 s->dir_mode = c_s->dir_mode;
768 s->file_mode = c_s->file_mode;
771 s->mounted_uid = c_s->mounted_uid;
776 struct compat_nfs_string {
781 static inline void compat_nfs_string(struct nfs_string *dst,
782 struct compat_nfs_string *src)
784 dst->data = compat_ptr(src->data);
788 struct compat_nfs4_mount_data_v1 {
789 compat_int_t version;
794 compat_int_t retrans;
795 compat_int_t acregmin;
796 compat_int_t acregmax;
797 compat_int_t acdirmin;
798 compat_int_t acdirmax;
799 struct compat_nfs_string client_addr;
800 struct compat_nfs_string mnt_path;
801 struct compat_nfs_string hostname;
802 compat_uint_t host_addrlen;
803 compat_uptr_t host_addr;
805 compat_int_t auth_flavourlen;
806 compat_uptr_t auth_flavours;
809 static int do_nfs4_super_data_conv(void *raw_data)
811 int version = *(compat_uint_t *) raw_data;
814 struct compat_nfs4_mount_data_v1 *raw = raw_data;
815 struct nfs4_mount_data *real = raw_data;
817 /* copy the fields backwards */
818 real->auth_flavours = compat_ptr(raw->auth_flavours);
819 real->auth_flavourlen = raw->auth_flavourlen;
820 real->proto = raw->proto;
821 real->host_addr = compat_ptr(raw->host_addr);
822 real->host_addrlen = raw->host_addrlen;
823 compat_nfs_string(&real->hostname, &raw->hostname);
824 compat_nfs_string(&real->mnt_path, &raw->mnt_path);
825 compat_nfs_string(&real->client_addr, &raw->client_addr);
826 real->acdirmax = raw->acdirmax;
827 real->acdirmin = raw->acdirmin;
828 real->acregmax = raw->acregmax;
829 real->acregmin = raw->acregmin;
830 real->retrans = raw->retrans;
831 real->timeo = raw->timeo;
832 real->wsize = raw->wsize;
833 real->rsize = raw->rsize;
834 real->flags = raw->flags;
835 real->version = raw->version;
844 #define SMBFS_NAME "smbfs"
845 #define NCPFS_NAME "ncpfs"
846 #define NFS4_NAME "nfs4"
848 asmlinkage long compat_sys_mount(char __user * dev_name, char __user * dir_name,
849 char __user * type, unsigned long flags,
852 unsigned long type_page;
853 unsigned long data_page;
854 unsigned long dev_page;
858 retval = copy_mount_options (type, &type_page);
862 dir_page = getname(dir_name);
863 retval = PTR_ERR(dir_page);
864 if (IS_ERR(dir_page))
867 retval = copy_mount_options (dev_name, &dev_page);
871 retval = copy_mount_options (data, &data_page);
877 if (type_page && data_page) {
878 if (!strcmp((char *)type_page, SMBFS_NAME)) {
879 do_smb_super_data_conv((void *)data_page);
880 } else if (!strcmp((char *)type_page, NCPFS_NAME)) {
881 do_ncp_super_data_conv((void *)data_page);
882 } else if (!strcmp((char *)type_page, NFS4_NAME)) {
883 if (do_nfs4_super_data_conv((void *) data_page))
889 retval = do_mount((char*)dev_page, dir_page, (char*)type_page,
890 flags, (void*)data_page);
894 free_page(data_page);
900 free_page(type_page);
905 #define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
907 struct compat_old_linux_dirent {
908 compat_ulong_t d_ino;
909 compat_ulong_t d_offset;
910 unsigned short d_namlen;
914 struct compat_readdir_callback {
915 struct compat_old_linux_dirent __user *dirent;
919 static int compat_fillonedir(void *__buf, const char *name, int namlen,
920 loff_t offset, u64 ino, unsigned int d_type)
922 struct compat_readdir_callback *buf = __buf;
923 struct compat_old_linux_dirent __user *dirent;
924 compat_ulong_t d_ino;
929 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino)
932 dirent = buf->dirent;
933 if (!access_ok(VERIFY_WRITE, dirent,
934 (unsigned long)(dirent->d_name + namlen + 1) -
935 (unsigned long)dirent))
937 if ( __put_user(d_ino, &dirent->d_ino) ||
938 __put_user(offset, &dirent->d_offset) ||
939 __put_user(namlen, &dirent->d_namlen) ||
940 __copy_to_user(dirent->d_name, name, namlen) ||
941 __put_user(0, dirent->d_name + namlen))
945 buf->result = -EFAULT;
949 asmlinkage long compat_sys_old_readdir(unsigned int fd,
950 struct compat_old_linux_dirent __user *dirent, unsigned int count)
954 struct compat_readdir_callback buf;
964 error = vfs_readdir(file, compat_fillonedir, &buf);
973 struct compat_linux_dirent {
974 compat_ulong_t d_ino;
975 compat_ulong_t d_off;
976 unsigned short d_reclen;
980 struct compat_getdents_callback {
981 struct compat_linux_dirent __user *current_dir;
982 struct compat_linux_dirent __user *previous;
987 static int compat_filldir(void *__buf, const char *name, int namlen,
988 loff_t offset, u64 ino, unsigned int d_type)
990 struct compat_linux_dirent __user * dirent;
991 struct compat_getdents_callback *buf = __buf;
992 compat_ulong_t d_ino;
993 int reclen = ALIGN(NAME_OFFSET(dirent) + namlen + 2, sizeof(compat_long_t));
995 buf->error = -EINVAL; /* only used if we fail.. */
996 if (reclen > buf->count)
999 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino)
1001 dirent = buf->previous;
1003 if (__put_user(offset, &dirent->d_off))
1006 dirent = buf->current_dir;
1007 if (__put_user(d_ino, &dirent->d_ino))
1009 if (__put_user(reclen, &dirent->d_reclen))
1011 if (copy_to_user(dirent->d_name, name, namlen))
1013 if (__put_user(0, dirent->d_name + namlen))
1015 if (__put_user(d_type, (char __user *) dirent + reclen - 1))
1017 buf->previous = dirent;
1018 dirent = (void __user *)dirent + reclen;
1019 buf->current_dir = dirent;
1020 buf->count -= reclen;
1023 buf->error = -EFAULT;
1027 asmlinkage long compat_sys_getdents(unsigned int fd,
1028 struct compat_linux_dirent __user *dirent, unsigned int count)
1031 struct compat_linux_dirent __user * lastdirent;
1032 struct compat_getdents_callback buf;
1036 if (!access_ok(VERIFY_WRITE, dirent, count))
1044 buf.current_dir = dirent;
1045 buf.previous = NULL;
1049 error = vfs_readdir(file, compat_filldir, &buf);
1053 lastdirent = buf.previous;
1055 if (put_user(file->f_pos, &lastdirent->d_off))
1058 error = count - buf.count;
1067 #ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64
1069 struct compat_getdents_callback64 {
1070 struct linux_dirent64 __user *current_dir;
1071 struct linux_dirent64 __user *previous;
1076 static int compat_filldir64(void * __buf, const char * name, int namlen, loff_t offset,
1077 u64 ino, unsigned int d_type)
1079 struct linux_dirent64 __user *dirent;
1080 struct compat_getdents_callback64 *buf = __buf;
1081 int jj = NAME_OFFSET(dirent);
1082 int reclen = ALIGN(jj + namlen + 1, sizeof(u64));
1085 buf->error = -EINVAL; /* only used if we fail.. */
1086 if (reclen > buf->count)
1088 dirent = buf->previous;
1091 if (__put_user_unaligned(offset, &dirent->d_off))
1094 dirent = buf->current_dir;
1095 if (__put_user_unaligned(ino, &dirent->d_ino))
1098 if (__put_user_unaligned(off, &dirent->d_off))
1100 if (__put_user(reclen, &dirent->d_reclen))
1102 if (__put_user(d_type, &dirent->d_type))
1104 if (copy_to_user(dirent->d_name, name, namlen))
1106 if (__put_user(0, dirent->d_name + namlen))
1108 buf->previous = dirent;
1109 dirent = (void __user *)dirent + reclen;
1110 buf->current_dir = dirent;
1111 buf->count -= reclen;
1114 buf->error = -EFAULT;
1118 asmlinkage long compat_sys_getdents64(unsigned int fd,
1119 struct linux_dirent64 __user * dirent, unsigned int count)
1122 struct linux_dirent64 __user * lastdirent;
1123 struct compat_getdents_callback64 buf;
1127 if (!access_ok(VERIFY_WRITE, dirent, count))
1135 buf.current_dir = dirent;
1136 buf.previous = NULL;
1140 error = vfs_readdir(file, compat_filldir64, &buf);
1144 lastdirent = buf.previous;
1146 typeof(lastdirent->d_off) d_off = file->f_pos;
1148 if (__put_user_unaligned(d_off, &lastdirent->d_off))
1150 error = count - buf.count;
1158 #endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */
1160 static ssize_t compat_do_readv_writev(int type, struct file *file,
1161 const struct compat_iovec __user *uvector,
1162 unsigned long nr_segs, loff_t *pos)
1164 compat_ssize_t tot_len;
1165 struct iovec iovstack[UIO_FASTIOV];
1166 struct iovec *iov=iovstack, *vector;
1173 * SuS says "The readv() function *may* fail if the iovcnt argument
1174 * was less than or equal to 0, or greater than {IOV_MAX}. Linux has
1175 * traditionally returned zero for zero segments, so...
1182 * First get the "struct iovec" from user memory and
1183 * verify all the pointers
1186 if ((nr_segs > UIO_MAXIOV) || (nr_segs <= 0))
1190 if (nr_segs > UIO_FASTIOV) {
1192 iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL);
1197 if (!access_ok(VERIFY_READ, uvector, nr_segs*sizeof(*uvector)))
1201 * Single unix specification:
1202 * We should -EINVAL if an element length is not >= 0 and fitting an
1203 * ssize_t. The total length is fitting an ssize_t
1205 * Be careful here because iov_len is a size_t not an ssize_t
1210 for (seg = 0 ; seg < nr_segs; seg++) {
1211 compat_ssize_t tmp = tot_len;
1215 if (__get_user(len, &uvector->iov_len) ||
1216 __get_user(buf, &uvector->iov_base)) {
1220 if (len < 0) /* size_t not fitting an compat_ssize_t .. */
1223 if (tot_len < tmp) /* maths overflow on the compat_ssize_t */
1225 vector->iov_base = compat_ptr(buf);
1226 vector->iov_len = (compat_size_t) len;
1235 ret = rw_verify_area(type, file, pos, tot_len);
1239 ret = security_file_permission(file, type == READ ? MAY_READ:MAY_WRITE);
1245 fn = file->f_op->read;
1246 fnv = file->f_op->aio_read;
1248 fn = (io_fn_t)file->f_op->write;
1249 fnv = file->f_op->aio_write;
1253 ret = do_sync_readv_writev(file, iov, nr_segs, tot_len,
1256 ret = do_loop_readv_writev(file, iov, nr_segs, pos, fn);
1259 if (iov != iovstack)
1261 if ((ret + (type == READ)) > 0) {
1262 struct dentry *dentry = file->f_path.dentry;
1264 fsnotify_access(dentry);
1266 fsnotify_modify(dentry);
1272 compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen)
1275 ssize_t ret = -EBADF;
1281 if (!(file->f_mode & FMODE_READ))
1285 if (!file->f_op || (!file->f_op->aio_read && !file->f_op->read))
1288 ret = compat_do_readv_writev(READ, file, vec, vlen, &file->f_pos);
1296 compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen)
1299 ssize_t ret = -EBADF;
1304 if (!(file->f_mode & FMODE_WRITE))
1308 if (!file->f_op || (!file->f_op->aio_write && !file->f_op->write))
1311 ret = compat_do_readv_writev(WRITE, file, vec, vlen, &file->f_pos);
1319 compat_sys_vmsplice(int fd, const struct compat_iovec __user *iov32,
1320 unsigned int nr_segs, unsigned int flags)
1323 struct iovec __user *iov;
1324 if (nr_segs > UIO_MAXIOV)
1326 iov = compat_alloc_user_space(nr_segs * sizeof(struct iovec));
1327 for (i = 0; i < nr_segs; i++) {
1328 struct compat_iovec v;
1329 if (get_user(v.iov_base, &iov32[i].iov_base) ||
1330 get_user(v.iov_len, &iov32[i].iov_len) ||
1331 put_user(compat_ptr(v.iov_base), &iov[i].iov_base) ||
1332 put_user(v.iov_len, &iov[i].iov_len))
1335 return sys_vmsplice(fd, iov, nr_segs, flags);
1339 * Exactly like fs/open.c:sys_open(), except that it doesn't set the
1343 compat_sys_open(const char __user *filename, int flags, int mode)
1345 return do_sys_open(AT_FDCWD, filename, flags, mode);
1349 * Exactly like fs/open.c:sys_openat(), except that it doesn't set the
1353 compat_sys_openat(unsigned int dfd, const char __user *filename, int flags, int mode)
1355 return do_sys_open(dfd, filename, flags, mode);
1359 * compat_count() counts the number of arguments/envelopes. It is basically
1360 * a copy of count() from fs/exec.c, except that it works with 32 bit argv
1361 * and envp pointers.
1363 static int compat_count(compat_uptr_t __user *argv, int max)
1371 if (get_user(p, argv))
1384 * compat_copy_strings() is basically a copy of copy_strings() from fs/exec.c
1385 * except that it works with 32 bit argv and envp pointers.
1387 static int compat_copy_strings(int argc, compat_uptr_t __user *argv,
1388 struct linux_binprm *bprm)
1390 struct page *kmapped_page = NULL;
1394 while (argc-- > 0) {
1399 if (get_user(str, argv+argc) ||
1400 !(len = strnlen_user(compat_ptr(str), bprm->p))) {
1405 if (bprm->p < len) {
1411 /* XXX: add architecture specific overflow check here. */
1416 int offset, bytes_to_copy;
1419 offset = pos % PAGE_SIZE;
1421 page = bprm->page[i];
1424 page = alloc_page(GFP_HIGHUSER);
1425 bprm->page[i] = page;
1433 if (page != kmapped_page) {
1435 kunmap(kmapped_page);
1436 kmapped_page = page;
1437 kaddr = kmap(kmapped_page);
1440 memset(kaddr, 0, offset);
1441 bytes_to_copy = PAGE_SIZE - offset;
1442 if (bytes_to_copy > len) {
1443 bytes_to_copy = len;
1445 memset(kaddr+offset+len, 0,
1446 PAGE_SIZE-offset-len);
1448 err = copy_from_user(kaddr+offset, compat_ptr(str),
1455 pos += bytes_to_copy;
1456 str += bytes_to_copy;
1457 len -= bytes_to_copy;
1463 kunmap(kmapped_page);
1469 #define free_arg_pages(bprm) do { } while (0)
1473 static inline void free_arg_pages(struct linux_binprm *bprm)
1477 for (i = 0; i < MAX_ARG_PAGES; i++) {
1479 __free_page(bprm->page[i]);
1480 bprm->page[i] = NULL;
1484 #endif /* CONFIG_MMU */
1487 * compat_do_execve() is mostly a copy of do_execve(), with the exception
1488 * that it processes 32 bit argv and envp pointers.
1490 int compat_do_execve(char * filename,
1491 compat_uptr_t __user *argv,
1492 compat_uptr_t __user *envp,
1493 struct pt_regs * regs)
1495 struct linux_binprm *bprm;
1501 bprm = kzalloc(sizeof(*bprm), GFP_KERNEL);
1505 file = open_exec(filename);
1506 retval = PTR_ERR(file);
1512 bprm->p = PAGE_SIZE*MAX_ARG_PAGES-sizeof(void *);
1514 bprm->filename = filename;
1515 bprm->interp = filename;
1516 bprm->mm = mm_alloc();
1521 retval = init_new_context(current, bprm->mm);
1525 bprm->argc = compat_count(argv, bprm->p / sizeof(compat_uptr_t));
1526 if ((retval = bprm->argc) < 0)
1529 bprm->envc = compat_count(envp, bprm->p / sizeof(compat_uptr_t));
1530 if ((retval = bprm->envc) < 0)
1533 retval = security_bprm_alloc(bprm);
1537 retval = prepare_binprm(bprm);
1541 retval = copy_strings_kernel(1, &bprm->filename, bprm);
1545 bprm->exec = bprm->p;
1546 retval = compat_copy_strings(bprm->envc, envp, bprm);
1550 retval = compat_copy_strings(bprm->argc, argv, bprm);
1554 retval = search_binary_handler(bprm, regs);
1556 free_arg_pages(bprm);
1558 /* execve success */
1559 security_bprm_free(bprm);
1560 acct_update_integrals(current);
1566 /* Something went wrong, return the inode and free the argument pages*/
1567 for (i = 0 ; i < MAX_ARG_PAGES ; i++) {
1568 struct page * page = bprm->page[i];
1574 security_bprm_free(bprm);
1582 allow_write_access(bprm->file);
1593 #define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t))
1596 * Ooo, nasty. We need here to frob 32-bit unsigned longs to
1597 * 64-bit unsigned longs.
1600 int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
1601 unsigned long *fdset)
1603 nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS);
1607 if (!access_ok(VERIFY_WRITE, ufdset, nr*sizeof(compat_ulong_t)))
1614 if (__get_user(l, ufdset) || __get_user(h, ufdset+1))
1617 *fdset++ = h << 32 | l;
1620 if (odd && __get_user(*fdset, ufdset))
1623 /* Tricky, must clear full unsigned long in the
1624 * kernel fdset at the end, this makes sure that
1627 memset(fdset, 0, ((nr + 1) & ~1)*sizeof(compat_ulong_t));
1633 int compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
1634 unsigned long *fdset)
1637 nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS);
1648 if (__put_user(l, ufdset) || __put_user(h, ufdset+1))
1653 if (odd && __put_user(*fdset, ufdset))
1660 * This is a virtual copy of sys_select from fs/select.c and probably
1661 * should be compared to it from time to time
1665 * We can actually return ERESTARTSYS instead of EINTR, but I'd
1666 * like to be certain this leads to no problems. So I return
1667 * EINTR just for safety.
1669 * Update: ERESTARTSYS breaks at least the xview clock binary, so
1670 * I'm trying ERESTARTNOHAND which restart only when you want to.
1672 #define MAX_SELECT_SECONDS \
1673 ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1)
1675 int compat_core_sys_select(int n, compat_ulong_t __user *inp,
1676 compat_ulong_t __user *outp, compat_ulong_t __user *exp, s64 *timeout)
1680 int size, max_fds, ret = -EINVAL;
1681 struct fdtable *fdt;
1686 /* max_fds can increase, so grab it once to avoid race */
1688 fdt = files_fdtable(current->files);
1689 max_fds = fdt->max_fds;
1695 * We need 6 bitmaps (in/out/ex for both incoming and outgoing),
1696 * since we used fdset we need to allocate memory in units of
1700 size = FDS_BYTES(n);
1701 bits = kmalloc(6 * size, GFP_KERNEL);
1704 fds.in = (unsigned long *) bits;
1705 fds.out = (unsigned long *) (bits + size);
1706 fds.ex = (unsigned long *) (bits + 2*size);
1707 fds.res_in = (unsigned long *) (bits + 3*size);
1708 fds.res_out = (unsigned long *) (bits + 4*size);
1709 fds.res_ex = (unsigned long *) (bits + 5*size);
1711 if ((ret = compat_get_fd_set(n, inp, fds.in)) ||
1712 (ret = compat_get_fd_set(n, outp, fds.out)) ||
1713 (ret = compat_get_fd_set(n, exp, fds.ex)))
1715 zero_fd_set(n, fds.res_in);
1716 zero_fd_set(n, fds.res_out);
1717 zero_fd_set(n, fds.res_ex);
1719 ret = do_select(n, &fds, timeout);
1724 ret = -ERESTARTNOHAND;
1725 if (signal_pending(current))
1730 if (compat_set_fd_set(n, inp, fds.res_in) ||
1731 compat_set_fd_set(n, outp, fds.res_out) ||
1732 compat_set_fd_set(n, exp, fds.res_ex))
1740 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
1741 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1742 struct compat_timeval __user *tvp)
1745 struct compat_timeval tv;
1749 if (copy_from_user(&tv, tvp, sizeof(tv)))
1752 if (tv.tv_sec < 0 || tv.tv_usec < 0)
1755 /* Cast to u64 to make GCC stop complaining */
1756 if ((u64)tv.tv_sec >= (u64)MAX_INT64_SECONDS)
1757 timeout = -1; /* infinite */
1759 timeout = DIV_ROUND_UP(tv.tv_usec, 1000000/HZ);
1760 timeout += tv.tv_sec * HZ;
1764 ret = compat_core_sys_select(n, inp, outp, exp, &timeout);
1767 struct compat_timeval rtv;
1769 if (current->personality & STICKY_TIMEOUTS)
1771 rtv.tv_usec = jiffies_to_usecs(do_div((*(u64*)&timeout), HZ));
1772 rtv.tv_sec = timeout;
1773 if (compat_timeval_compare(&rtv, &tv) >= 0)
1775 if (copy_to_user(tvp, &rtv, sizeof(rtv))) {
1778 * If an application puts its timeval in read-only
1779 * memory, we don't want the Linux-specific update to
1780 * the timeval to cause a fault after the select has
1781 * completed successfully. However, because we're not
1782 * updating the timeval, we can't restart the system
1785 if (ret == -ERESTARTNOHAND)
1793 #ifdef TIF_RESTORE_SIGMASK
1794 asmlinkage long compat_sys_pselect7(int n, compat_ulong_t __user *inp,
1795 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1796 struct compat_timespec __user *tsp, compat_sigset_t __user *sigmask,
1797 compat_size_t sigsetsize)
1799 compat_sigset_t ss32;
1800 sigset_t ksigmask, sigsaved;
1801 s64 timeout = MAX_SCHEDULE_TIMEOUT;
1802 struct compat_timespec ts;
1806 if (copy_from_user(&ts, tsp, sizeof(ts)))
1809 if (ts.tv_sec < 0 || ts.tv_nsec < 0)
1814 if (sigsetsize != sizeof(compat_sigset_t))
1816 if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
1818 sigset_from_compat(&ksigmask, &ss32);
1820 sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP));
1821 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
1826 if ((unsigned long)ts.tv_sec < MAX_SELECT_SECONDS) {
1827 timeout = DIV_ROUND_UP(ts.tv_nsec, 1000000000/HZ);
1828 timeout += ts.tv_sec * (unsigned long)HZ;
1832 ts.tv_sec -= MAX_SELECT_SECONDS;
1833 timeout = MAX_SELECT_SECONDS * HZ;
1837 ret = compat_core_sys_select(n, inp, outp, exp, &timeout);
1839 } while (!ret && !timeout && tsp && (ts.tv_sec || ts.tv_nsec));
1842 struct compat_timespec rts;
1844 if (current->personality & STICKY_TIMEOUTS)
1847 rts.tv_sec = timeout / HZ;
1848 rts.tv_nsec = (timeout % HZ) * (NSEC_PER_SEC/HZ);
1849 if (rts.tv_nsec >= NSEC_PER_SEC) {
1851 rts.tv_nsec -= NSEC_PER_SEC;
1853 if (compat_timespec_compare(&rts, &ts) >= 0)
1855 if (copy_to_user(tsp, &rts, sizeof(rts))) {
1858 * If an application puts its timeval in read-only
1859 * memory, we don't want the Linux-specific update to
1860 * the timeval to cause a fault after the select has
1861 * completed successfully. However, because we're not
1862 * updating the timeval, we can't restart the system
1865 if (ret == -ERESTARTNOHAND)
1870 if (ret == -ERESTARTNOHAND) {
1872 * Don't restore the signal mask yet. Let do_signal() deliver
1873 * the signal on the way back to userspace, before the signal
1877 memcpy(¤t->saved_sigmask, &sigsaved,
1879 set_thread_flag(TIF_RESTORE_SIGMASK);
1882 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
1887 asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp,
1888 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1889 struct compat_timespec __user *tsp, void __user *sig)
1891 compat_size_t sigsetsize = 0;
1892 compat_uptr_t up = 0;
1895 if (!access_ok(VERIFY_READ, sig,
1896 sizeof(compat_uptr_t)+sizeof(compat_size_t)) ||
1897 __get_user(up, (compat_uptr_t __user *)sig) ||
1898 __get_user(sigsetsize,
1899 (compat_size_t __user *)(sig+sizeof(up))))
1902 return compat_sys_pselect7(n, inp, outp, exp, tsp, compat_ptr(up),
1906 asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
1907 unsigned int nfds, struct compat_timespec __user *tsp,
1908 const compat_sigset_t __user *sigmask, compat_size_t sigsetsize)
1910 compat_sigset_t ss32;
1911 sigset_t ksigmask, sigsaved;
1912 struct compat_timespec ts;
1917 if (copy_from_user(&ts, tsp, sizeof(ts)))
1920 /* We assume that ts.tv_sec is always lower than
1921 the number of seconds that can be expressed in
1922 an s64. Otherwise the compiler bitches at us */
1923 timeout = DIV_ROUND_UP(ts.tv_nsec, 1000000000/HZ);
1924 timeout += ts.tv_sec * HZ;
1928 if (sigsetsize != sizeof(compat_sigset_t))
1930 if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
1932 sigset_from_compat(&ksigmask, &ss32);
1934 sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP));
1935 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
1938 ret = do_sys_poll(ufds, nfds, &timeout);
1940 /* We can restart this syscall, usually */
1941 if (ret == -EINTR) {
1943 * Don't restore the signal mask yet. Let do_signal() deliver
1944 * the signal on the way back to userspace, before the signal
1948 memcpy(¤t->saved_sigmask, &sigsaved,
1950 set_thread_flag(TIF_RESTORE_SIGMASK);
1952 ret = -ERESTARTNOHAND;
1954 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
1956 if (tsp && timeout >= 0) {
1957 struct compat_timespec rts;
1959 if (current->personality & STICKY_TIMEOUTS)
1961 /* Yes, we know it's actually an s64, but it's also positive. */
1962 rts.tv_nsec = jiffies_to_usecs(do_div((*(u64*)&timeout), HZ)) *
1964 rts.tv_sec = timeout;
1965 if (compat_timespec_compare(&rts, &ts) >= 0)
1967 if (copy_to_user(tsp, &rts, sizeof(rts))) {
1970 * If an application puts its timeval in read-only
1971 * memory, we don't want the Linux-specific update to
1972 * the timeval to cause a fault after the select has
1973 * completed successfully. However, because we're not
1974 * updating the timeval, we can't restart the system
1977 if (ret == -ERESTARTNOHAND && timeout >= 0)
1984 #endif /* TIF_RESTORE_SIGMASK */
1986 #if defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE)
1987 /* Stuff for NFS server syscalls... */
1988 struct compat_nfsctl_svc {
1993 struct compat_nfsctl_client {
1994 s8 cl32_ident[NFSCLNT_IDMAX+1];
1996 struct in_addr cl32_addrlist[NFSCLNT_ADDRMAX];
1999 u8 cl32_fhkey[NFSCLNT_KEYMAX];
2002 struct compat_nfsctl_export {
2003 char ex32_client[NFSCLNT_IDMAX+1];
2004 char ex32_path[NFS_MAXPATHLEN+1];
2005 compat_dev_t ex32_dev;
2006 compat_ino_t ex32_ino;
2007 compat_int_t ex32_flags;
2008 __compat_uid_t ex32_anon_uid;
2009 __compat_gid_t ex32_anon_gid;
2012 struct compat_nfsctl_fdparm {
2013 struct sockaddr gd32_addr;
2014 s8 gd32_path[NFS_MAXPATHLEN+1];
2015 compat_int_t gd32_version;
2018 struct compat_nfsctl_fsparm {
2019 struct sockaddr gd32_addr;
2020 s8 gd32_path[NFS_MAXPATHLEN+1];
2021 compat_int_t gd32_maxlen;
2024 struct compat_nfsctl_arg {
2025 compat_int_t ca32_version; /* safeguard */
2027 struct compat_nfsctl_svc u32_svc;
2028 struct compat_nfsctl_client u32_client;
2029 struct compat_nfsctl_export u32_export;
2030 struct compat_nfsctl_fdparm u32_getfd;
2031 struct compat_nfsctl_fsparm u32_getfs;
2033 #define ca32_svc u.u32_svc
2034 #define ca32_client u.u32_client
2035 #define ca32_export u.u32_export
2036 #define ca32_getfd u.u32_getfd
2037 #define ca32_getfs u.u32_getfs
2040 union compat_nfsctl_res {
2041 __u8 cr32_getfh[NFS_FHSIZE];
2042 struct knfsd_fh cr32_getfs;
2045 static int compat_nfs_svc_trans(struct nfsctl_arg *karg,
2046 struct compat_nfsctl_arg __user *arg)
2048 if (!access_ok(VERIFY_READ, &arg->ca32_svc, sizeof(arg->ca32_svc)) ||
2049 get_user(karg->ca_version, &arg->ca32_version) ||
2050 __get_user(karg->ca_svc.svc_port, &arg->ca32_svc.svc32_port) ||
2051 __get_user(karg->ca_svc.svc_nthreads,
2052 &arg->ca32_svc.svc32_nthreads))
2057 static int compat_nfs_clnt_trans(struct nfsctl_arg *karg,
2058 struct compat_nfsctl_arg __user *arg)
2060 if (!access_ok(VERIFY_READ, &arg->ca32_client,
2061 sizeof(arg->ca32_client)) ||
2062 get_user(karg->ca_version, &arg->ca32_version) ||
2063 __copy_from_user(&karg->ca_client.cl_ident[0],
2064 &arg->ca32_client.cl32_ident[0],
2066 __get_user(karg->ca_client.cl_naddr,
2067 &arg->ca32_client.cl32_naddr) ||
2068 __copy_from_user(&karg->ca_client.cl_addrlist[0],
2069 &arg->ca32_client.cl32_addrlist[0],
2070 (sizeof(struct in_addr) * NFSCLNT_ADDRMAX)) ||
2071 __get_user(karg->ca_client.cl_fhkeytype,
2072 &arg->ca32_client.cl32_fhkeytype) ||
2073 __get_user(karg->ca_client.cl_fhkeylen,
2074 &arg->ca32_client.cl32_fhkeylen) ||
2075 __copy_from_user(&karg->ca_client.cl_fhkey[0],
2076 &arg->ca32_client.cl32_fhkey[0],
2083 static int compat_nfs_exp_trans(struct nfsctl_arg *karg,
2084 struct compat_nfsctl_arg __user *arg)
2086 if (!access_ok(VERIFY_READ, &arg->ca32_export,
2087 sizeof(arg->ca32_export)) ||
2088 get_user(karg->ca_version, &arg->ca32_version) ||
2089 __copy_from_user(&karg->ca_export.ex_client[0],
2090 &arg->ca32_export.ex32_client[0],
2092 __copy_from_user(&karg->ca_export.ex_path[0],
2093 &arg->ca32_export.ex32_path[0],
2095 __get_user(karg->ca_export.ex_dev,
2096 &arg->ca32_export.ex32_dev) ||
2097 __get_user(karg->ca_export.ex_ino,
2098 &arg->ca32_export.ex32_ino) ||
2099 __get_user(karg->ca_export.ex_flags,
2100 &arg->ca32_export.ex32_flags) ||
2101 __get_user(karg->ca_export.ex_anon_uid,
2102 &arg->ca32_export.ex32_anon_uid) ||
2103 __get_user(karg->ca_export.ex_anon_gid,
2104 &arg->ca32_export.ex32_anon_gid))
2106 SET_UID(karg->ca_export.ex_anon_uid, karg->ca_export.ex_anon_uid);
2107 SET_GID(karg->ca_export.ex_anon_gid, karg->ca_export.ex_anon_gid);
2112 static int compat_nfs_getfd_trans(struct nfsctl_arg *karg,
2113 struct compat_nfsctl_arg __user *arg)
2115 if (!access_ok(VERIFY_READ, &arg->ca32_getfd,
2116 sizeof(arg->ca32_getfd)) ||
2117 get_user(karg->ca_version, &arg->ca32_version) ||
2118 __copy_from_user(&karg->ca_getfd.gd_addr,
2119 &arg->ca32_getfd.gd32_addr,
2120 (sizeof(struct sockaddr))) ||
2121 __copy_from_user(&karg->ca_getfd.gd_path,
2122 &arg->ca32_getfd.gd32_path,
2123 (NFS_MAXPATHLEN+1)) ||
2124 __get_user(karg->ca_getfd.gd_version,
2125 &arg->ca32_getfd.gd32_version))
2131 static int compat_nfs_getfs_trans(struct nfsctl_arg *karg,
2132 struct compat_nfsctl_arg __user *arg)
2134 if (!access_ok(VERIFY_READ,&arg->ca32_getfs,sizeof(arg->ca32_getfs)) ||
2135 get_user(karg->ca_version, &arg->ca32_version) ||
2136 __copy_from_user(&karg->ca_getfs.gd_addr,
2137 &arg->ca32_getfs.gd32_addr,
2138 (sizeof(struct sockaddr))) ||
2139 __copy_from_user(&karg->ca_getfs.gd_path,
2140 &arg->ca32_getfs.gd32_path,
2141 (NFS_MAXPATHLEN+1)) ||
2142 __get_user(karg->ca_getfs.gd_maxlen,
2143 &arg->ca32_getfs.gd32_maxlen))
2149 /* This really doesn't need translations, we are only passing
2150 * back a union which contains opaque nfs file handle data.
2152 static int compat_nfs_getfh_res_trans(union nfsctl_res *kres,
2153 union compat_nfsctl_res __user *res)
2157 err = copy_to_user(res, kres, sizeof(*res));
2159 return (err) ? -EFAULT : 0;
2162 asmlinkage long compat_sys_nfsservctl(int cmd,
2163 struct compat_nfsctl_arg __user *arg,
2164 union compat_nfsctl_res __user *res)
2166 struct nfsctl_arg *karg;
2167 union nfsctl_res *kres;
2171 karg = kmalloc(sizeof(*karg), GFP_USER);
2172 kres = kmalloc(sizeof(*kres), GFP_USER);
2173 if(!karg || !kres) {
2180 err = compat_nfs_svc_trans(karg, arg);
2183 case NFSCTL_ADDCLIENT:
2184 err = compat_nfs_clnt_trans(karg, arg);
2187 case NFSCTL_DELCLIENT:
2188 err = compat_nfs_clnt_trans(karg, arg);
2192 case NFSCTL_UNEXPORT:
2193 err = compat_nfs_exp_trans(karg, arg);
2197 err = compat_nfs_getfd_trans(karg, arg);
2201 err = compat_nfs_getfs_trans(karg, arg);
2214 /* The __user pointer casts are valid because of the set_fs() */
2215 err = sys_nfsservctl(cmd, (void __user *) karg, (void __user *) kres);
2221 if((cmd == NFSCTL_GETFD) ||
2222 (cmd == NFSCTL_GETFS))
2223 err = compat_nfs_getfh_res_trans(kres, res);
2231 long asmlinkage compat_sys_nfsservctl(int cmd, void *notused, void *notused2)
2233 return sys_ni_syscall();
2239 #ifdef CONFIG_HAS_COMPAT_EPOLL_EVENT
2240 asmlinkage long compat_sys_epoll_ctl(int epfd, int op, int fd,
2241 struct compat_epoll_event __user *event)
2244 struct compat_epoll_event user;
2245 struct epoll_event __user *kernel = NULL;
2248 if (copy_from_user(&user, event, sizeof(user)))
2250 kernel = compat_alloc_user_space(sizeof(struct epoll_event));
2251 err |= __put_user(user.events, &kernel->events);
2252 err |= __put_user(user.data, &kernel->data);
2255 return err ? err : sys_epoll_ctl(epfd, op, fd, kernel);
2259 asmlinkage long compat_sys_epoll_wait(int epfd,
2260 struct compat_epoll_event __user *events,
2261 int maxevents, int timeout)
2263 long i, ret, err = 0;
2264 struct epoll_event __user *kbuf;
2265 struct epoll_event ev;
2267 if ((maxevents <= 0) ||
2268 (maxevents > (INT_MAX / sizeof(struct epoll_event))))
2270 kbuf = compat_alloc_user_space(sizeof(struct epoll_event) * maxevents);
2271 ret = sys_epoll_wait(epfd, kbuf, maxevents, timeout);
2272 for (i = 0; i < ret; i++) {
2273 err |= __get_user(ev.events, &kbuf[i].events);
2274 err |= __get_user(ev.data, &kbuf[i].data);
2275 err |= __put_user(ev.events, &events->events);
2276 err |= __put_user_unaligned(ev.data, &events->data);
2280 return err ? -EFAULT: ret;
2282 #endif /* CONFIG_HAS_COMPAT_EPOLL_EVENT */
2284 #ifdef TIF_RESTORE_SIGMASK
2285 asmlinkage long compat_sys_epoll_pwait(int epfd,
2286 struct compat_epoll_event __user *events,
2287 int maxevents, int timeout,
2288 const compat_sigset_t __user *sigmask,
2289 compat_size_t sigsetsize)
2292 compat_sigset_t csigmask;
2293 sigset_t ksigmask, sigsaved;
2296 * If the caller wants a certain signal mask to be set during the wait,
2300 if (sigsetsize != sizeof(compat_sigset_t))
2302 if (copy_from_user(&csigmask, sigmask, sizeof(csigmask)))
2304 sigset_from_compat(&ksigmask, &csigmask);
2305 sigdelsetmask(&ksigmask, sigmask(SIGKILL) | sigmask(SIGSTOP));
2306 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
2309 #ifdef CONFIG_HAS_COMPAT_EPOLL_EVENT
2310 err = compat_sys_epoll_wait(epfd, events, maxevents, timeout);
2312 err = sys_epoll_wait(epfd, events, maxevents, timeout);
2316 * If we changed the signal mask, we need to restore the original one.
2317 * In case we've got a signal while waiting, we do not restore the
2318 * signal mask yet, and we allow do_signal() to deliver the signal on
2319 * the way back to userspace, before the signal mask is restored.
2322 if (err == -EINTR) {
2323 memcpy(¤t->saved_sigmask, &sigsaved,
2325 set_thread_flag(TIF_RESTORE_SIGMASK);
2327 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
2332 #endif /* TIF_RESTORE_SIGMASK */
2334 #endif /* CONFIG_EPOLL */