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/linkage.h>
19 #include <linux/compat.h>
20 #include <linux/errno.h>
21 #include <linux/time.h>
23 #include <linux/fcntl.h>
24 #include <linux/namei.h>
25 #include <linux/file.h>
26 #include <linux/vfs.h>
27 #include <linux/ioctl32.h>
28 #include <linux/ioctl.h>
29 #include <linux/init.h>
30 #include <linux/sockios.h> /* for SIOCDEVPRIVATE */
31 #include <linux/smb.h>
32 #include <linux/smb_mount.h>
33 #include <linux/ncp_mount.h>
34 #include <linux/nfs4_mount.h>
35 #include <linux/smp_lock.h>
36 #include <linux/syscalls.h>
37 #include <linux/ctype.h>
38 #include <linux/module.h>
39 #include <linux/dirent.h>
40 #include <linux/fsnotify.h>
41 #include <linux/highuid.h>
42 #include <linux/sunrpc/svc.h>
43 #include <linux/nfsd/nfsd.h>
44 #include <linux/nfsd/syscall.h>
45 #include <linux/personality.h>
46 #include <linux/rwsem.h>
47 #include <linux/tsacct_kern.h>
48 #include <linux/highmem.h>
49 #include <linux/poll.h>
51 #include <linux/eventpoll.h>
53 #include <net/sock.h> /* siocdevprivate_ioctl */
55 #include <asm/uaccess.h>
56 #include <asm/mmu_context.h>
57 #include <asm/ioctls.h>
62 int compat_printk(const char *fmt, ...)
69 ret = vprintk(fmt, ap);
74 #include "read_write.h"
77 * Not all architectures have sys_utime, so implement this in terms
80 asmlinkage long compat_sys_utime(char __user *filename, struct compat_utimbuf __user *t)
85 if (get_user(tv[0].tv_sec, &t->actime) ||
86 get_user(tv[1].tv_sec, &t->modtime))
91 return do_utimes(AT_FDCWD, filename, t ? tv : NULL);
94 asmlinkage long compat_sys_futimesat(unsigned int dfd, char __user *filename, struct compat_timeval __user *t)
99 if (get_user(tv[0].tv_sec, &t[0].tv_sec) ||
100 get_user(tv[0].tv_usec, &t[0].tv_usec) ||
101 get_user(tv[1].tv_sec, &t[1].tv_sec) ||
102 get_user(tv[1].tv_usec, &t[1].tv_usec))
105 return do_utimes(dfd, filename, t ? tv : NULL);
108 asmlinkage long compat_sys_utimes(char __user *filename, struct compat_timeval __user *t)
110 return compat_sys_futimesat(AT_FDCWD, filename, t);
113 asmlinkage long compat_sys_newstat(char __user * filename,
114 struct compat_stat __user *statbuf)
117 int error = vfs_stat_fd(AT_FDCWD, filename, &stat);
120 error = cp_compat_stat(&stat, statbuf);
124 asmlinkage long compat_sys_newlstat(char __user * filename,
125 struct compat_stat __user *statbuf)
128 int error = vfs_lstat_fd(AT_FDCWD, filename, &stat);
131 error = cp_compat_stat(&stat, statbuf);
135 #ifndef __ARCH_WANT_STAT64
136 asmlinkage long compat_sys_newfstatat(unsigned int dfd, char __user *filename,
137 struct compat_stat __user *statbuf, int flag)
142 if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
145 if (flag & AT_SYMLINK_NOFOLLOW)
146 error = vfs_lstat_fd(dfd, filename, &stat);
148 error = vfs_stat_fd(dfd, filename, &stat);
151 error = cp_compat_stat(&stat, statbuf);
158 asmlinkage long compat_sys_newfstat(unsigned int fd,
159 struct compat_stat __user * statbuf)
162 int error = vfs_fstat(fd, &stat);
165 error = cp_compat_stat(&stat, statbuf);
169 static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *kbuf)
172 if (sizeof ubuf->f_blocks == 4) {
173 if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail) &
174 0xffffffff00000000ULL)
176 /* f_files and f_ffree may be -1; it's okay
177 * to stuff that into 32 bits */
178 if (kbuf->f_files != 0xffffffffffffffffULL
179 && (kbuf->f_files & 0xffffffff00000000ULL))
181 if (kbuf->f_ffree != 0xffffffffffffffffULL
182 && (kbuf->f_ffree & 0xffffffff00000000ULL))
185 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
186 __put_user(kbuf->f_type, &ubuf->f_type) ||
187 __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
188 __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
189 __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
190 __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
191 __put_user(kbuf->f_files, &ubuf->f_files) ||
192 __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
193 __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
194 __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
195 __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
196 __put_user(kbuf->f_frsize, &ubuf->f_frsize) ||
197 __put_user(0, &ubuf->f_spare[0]) ||
198 __put_user(0, &ubuf->f_spare[1]) ||
199 __put_user(0, &ubuf->f_spare[2]) ||
200 __put_user(0, &ubuf->f_spare[3]) ||
201 __put_user(0, &ubuf->f_spare[4]))
207 * The following statfs calls are copies of code from fs/open.c and
208 * should be checked against those from time to time
210 asmlinkage long compat_sys_statfs(const char __user *path, struct compat_statfs __user *buf)
215 error = user_path_walk(path, &nd);
218 error = vfs_statfs(nd.dentry, &tmp);
220 error = put_compat_statfs(buf, &tmp);
226 asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user *buf)
236 error = vfs_statfs(file->f_path.dentry, &tmp);
238 error = put_compat_statfs(buf, &tmp);
244 static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf)
246 if (sizeof ubuf->f_blocks == 4) {
247 if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail) &
248 0xffffffff00000000ULL)
250 /* f_files and f_ffree may be -1; it's okay
251 * to stuff that into 32 bits */
252 if (kbuf->f_files != 0xffffffffffffffffULL
253 && (kbuf->f_files & 0xffffffff00000000ULL))
255 if (kbuf->f_ffree != 0xffffffffffffffffULL
256 && (kbuf->f_ffree & 0xffffffff00000000ULL))
259 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
260 __put_user(kbuf->f_type, &ubuf->f_type) ||
261 __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
262 __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
263 __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
264 __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
265 __put_user(kbuf->f_files, &ubuf->f_files) ||
266 __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
267 __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
268 __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
269 __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
270 __put_user(kbuf->f_frsize, &ubuf->f_frsize))
275 asmlinkage long compat_sys_statfs64(const char __user *path, compat_size_t sz, struct compat_statfs64 __user *buf)
280 if (sz != sizeof(*buf))
283 error = user_path_walk(path, &nd);
286 error = vfs_statfs(nd.dentry, &tmp);
288 error = put_compat_statfs64(buf, &tmp);
294 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, struct compat_statfs64 __user *buf)
300 if (sz != sizeof(*buf))
307 error = vfs_statfs(file->f_path.dentry, &tmp);
309 error = put_compat_statfs64(buf, &tmp);
315 /* ioctl32 stuff, used by sparc64, parisc, s390x, ppc64, x86_64, MIPS */
317 #define IOCTL_HASHSIZE 256
318 static struct ioctl_trans *ioctl32_hash_table[IOCTL_HASHSIZE];
320 static inline unsigned long ioctl32_hash(unsigned long cmd)
322 return (((cmd >> 6) ^ (cmd >> 4) ^ cmd)) % IOCTL_HASHSIZE;
325 static void ioctl32_insert_translation(struct ioctl_trans *trans)
328 struct ioctl_trans *t;
330 hash = ioctl32_hash (trans->cmd);
331 if (!ioctl32_hash_table[hash])
332 ioctl32_hash_table[hash] = trans;
334 t = ioctl32_hash_table[hash];
342 static int __init init_sys32_ioctl(void)
346 for (i = 0; i < ioctl_table_size; i++) {
347 if (ioctl_start[i].next != 0) {
348 printk("ioctl translation %d bad\n",i);
352 ioctl32_insert_translation(&ioctl_start[i]);
357 __initcall(init_sys32_ioctl);
359 static void compat_ioctl_error(struct file *filp, unsigned int fd,
360 unsigned int cmd, unsigned long arg)
366 /* find the name of the device. */
367 path = (char *)__get_free_page(GFP_KERNEL);
369 fn = d_path(filp->f_path.dentry, filp->f_path.mnt, path, PAGE_SIZE);
374 sprintf(buf,"'%c'", (cmd>>24) & 0x3f);
375 if (!isprint(buf[1]))
376 sprintf(buf, "%02x", buf[1]);
377 compat_printk("ioctl32(%s:%d): Unknown cmd fd(%d) "
378 "cmd(%08x){%s} arg(%08x) on %s\n",
379 current->comm, current->pid,
380 (int)fd, (unsigned int)cmd, buf,
381 (unsigned int)arg, fn);
384 free_page((unsigned long)path);
387 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
392 struct ioctl_trans *t;
395 filp = fget_light(fd, &fput_needed);
399 /* RED-PEN how should LSM module know it's handling 32bit? */
400 error = security_file_ioctl(filp, cmd, arg);
405 * To allow the compat_ioctl handlers to be self contained
406 * we need to check the common ioctls here first.
407 * Just handle them with the standard handlers below.
420 if (S_ISREG(filp->f_path.dentry->d_inode->i_mode))
425 if (filp->f_op && filp->f_op->compat_ioctl) {
426 error = filp->f_op->compat_ioctl(filp, cmd, arg);
427 if (error != -ENOIOCTLCMD)
432 (!filp->f_op->ioctl && !filp->f_op->unlocked_ioctl))
437 for (t = ioctl32_hash_table[ioctl32_hash(cmd)]; t; t = t->next) {
442 if (S_ISSOCK(filp->f_path.dentry->d_inode->i_mode) &&
443 cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) {
444 error = siocdevprivate_ioctl(fd, cmd, arg);
449 compat_ioctl_error(filp, fd, cmd, arg);
458 error = t->handler(fd, cmd, arg, filp);
464 error = vfs_ioctl(filp, fd, cmd, arg);
466 fput_light(filp, fput_needed);
471 static int get_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
473 if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
474 __get_user(kfl->l_type, &ufl->l_type) ||
475 __get_user(kfl->l_whence, &ufl->l_whence) ||
476 __get_user(kfl->l_start, &ufl->l_start) ||
477 __get_user(kfl->l_len, &ufl->l_len) ||
478 __get_user(kfl->l_pid, &ufl->l_pid))
483 static int put_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
485 if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
486 __put_user(kfl->l_type, &ufl->l_type) ||
487 __put_user(kfl->l_whence, &ufl->l_whence) ||
488 __put_user(kfl->l_start, &ufl->l_start) ||
489 __put_user(kfl->l_len, &ufl->l_len) ||
490 __put_user(kfl->l_pid, &ufl->l_pid))
495 #ifndef HAVE_ARCH_GET_COMPAT_FLOCK64
496 static int get_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
498 if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
499 __get_user(kfl->l_type, &ufl->l_type) ||
500 __get_user(kfl->l_whence, &ufl->l_whence) ||
501 __get_user(kfl->l_start, &ufl->l_start) ||
502 __get_user(kfl->l_len, &ufl->l_len) ||
503 __get_user(kfl->l_pid, &ufl->l_pid))
509 #ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64
510 static int put_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
512 if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
513 __put_user(kfl->l_type, &ufl->l_type) ||
514 __put_user(kfl->l_whence, &ufl->l_whence) ||
515 __put_user(kfl->l_start, &ufl->l_start) ||
516 __put_user(kfl->l_len, &ufl->l_len) ||
517 __put_user(kfl->l_pid, &ufl->l_pid))
523 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
534 ret = get_compat_flock(&f, compat_ptr(arg));
539 ret = sys_fcntl(fd, cmd, (unsigned long)&f);
541 if (cmd == F_GETLK && ret == 0) {
542 /* GETLK was successfule and we need to return the data...
543 * but it needs to fit in the compat structure.
544 * l_start shouldn't be too big, unless the original
545 * start + end is greater than COMPAT_OFF_T_MAX, in which
546 * case the app was asking for trouble, so we return
547 * -EOVERFLOW in that case.
548 * l_len could be too big, in which case we just truncate it,
549 * and only allow the app to see that part of the conflicting
550 * lock that might make sense to it anyway
553 if (f.l_start > COMPAT_OFF_T_MAX)
555 if (f.l_len > COMPAT_OFF_T_MAX)
556 f.l_len = COMPAT_OFF_T_MAX;
558 ret = put_compat_flock(&f, compat_ptr(arg));
565 ret = get_compat_flock64(&f, compat_ptr(arg));
570 ret = sys_fcntl(fd, (cmd == F_GETLK64) ? F_GETLK :
571 ((cmd == F_SETLK64) ? F_SETLK : F_SETLKW),
574 if (cmd == F_GETLK64 && ret == 0) {
575 /* need to return lock information - see above for commentary */
576 if (f.l_start > COMPAT_LOFF_T_MAX)
578 if (f.l_len > COMPAT_LOFF_T_MAX)
579 f.l_len = COMPAT_LOFF_T_MAX;
581 ret = put_compat_flock64(&f, compat_ptr(arg));
586 ret = sys_fcntl(fd, cmd, arg);
592 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
595 if ((cmd == F_GETLK64) || (cmd == F_SETLK64) || (cmd == F_SETLKW64))
597 return compat_sys_fcntl64(fd, cmd, arg);
601 compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p)
606 mm_segment_t oldfs = get_fs();
607 if (unlikely(get_user(ctx64, ctx32p)))
611 /* The __user pointer cast is valid because of the set_fs() */
612 ret = sys_io_setup(nr_reqs, (aio_context_t __user *) &ctx64);
614 /* truncating is ok because it's a user address */
616 ret = put_user((u32) ctx64, ctx32p);
621 compat_sys_io_getevents(aio_context_t ctx_id,
622 unsigned long min_nr,
624 struct io_event __user *events,
625 struct compat_timespec __user *timeout)
629 struct timespec __user *ut = NULL;
632 if (unlikely(!access_ok(VERIFY_WRITE, events,
633 nr * sizeof(struct io_event))))
636 if (get_compat_timespec(&t, timeout))
639 ut = compat_alloc_user_space(sizeof(*ut));
640 if (copy_to_user(ut, &t, sizeof(t)) )
643 ret = sys_io_getevents(ctx_id, min_nr, nr, events, ut);
649 copy_iocb(long nr, u32 __user *ptr32, struct iocb __user * __user *ptr64)
654 for (i = 0; i < nr; ++i) {
655 if (get_user(uptr, ptr32 + i))
657 if (put_user(compat_ptr(uptr), ptr64 + i))
663 #define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *))
666 compat_sys_io_submit(aio_context_t ctx_id, int nr, u32 __user *iocb)
668 struct iocb __user * __user *iocb64;
671 if (unlikely(nr < 0))
674 if (nr > MAX_AIO_SUBMITS)
675 nr = MAX_AIO_SUBMITS;
677 iocb64 = compat_alloc_user_space(nr * sizeof(*iocb64));
678 ret = copy_iocb(nr, iocb, iocb64);
680 ret = sys_io_submit(ctx_id, nr, iocb64);
684 struct compat_ncp_mount_data {
685 compat_int_t version;
686 compat_uint_t ncp_fd;
687 __compat_uid_t mounted_uid;
688 compat_pid_t wdog_pid;
689 unsigned char mounted_vol[NCP_VOLNAME_LEN + 1];
690 compat_uint_t time_out;
691 compat_uint_t retry_count;
695 compat_mode_t file_mode;
696 compat_mode_t dir_mode;
699 struct compat_ncp_mount_data_v4 {
700 compat_int_t version;
701 compat_ulong_t flags;
702 compat_ulong_t mounted_uid;
703 compat_long_t wdog_pid;
704 compat_uint_t ncp_fd;
705 compat_uint_t time_out;
706 compat_uint_t retry_count;
709 compat_ulong_t file_mode;
710 compat_ulong_t dir_mode;
713 static void *do_ncp_super_data_conv(void *raw_data)
715 int version = *(unsigned int *)raw_data;
718 struct compat_ncp_mount_data *c_n = raw_data;
719 struct ncp_mount_data *n = raw_data;
721 n->dir_mode = c_n->dir_mode;
722 n->file_mode = c_n->file_mode;
725 memmove (n->mounted_vol, c_n->mounted_vol, (sizeof (c_n->mounted_vol) + 3 * sizeof (unsigned int)));
726 n->wdog_pid = c_n->wdog_pid;
727 n->mounted_uid = c_n->mounted_uid;
728 } else if (version == 4) {
729 struct compat_ncp_mount_data_v4 *c_n = raw_data;
730 struct ncp_mount_data_v4 *n = raw_data;
732 n->dir_mode = c_n->dir_mode;
733 n->file_mode = c_n->file_mode;
736 n->retry_count = c_n->retry_count;
737 n->time_out = c_n->time_out;
738 n->ncp_fd = c_n->ncp_fd;
739 n->wdog_pid = c_n->wdog_pid;
740 n->mounted_uid = c_n->mounted_uid;
741 n->flags = c_n->flags;
742 } else if (version != 5) {
749 struct compat_smb_mount_data {
750 compat_int_t version;
751 __compat_uid_t mounted_uid;
754 compat_mode_t file_mode;
755 compat_mode_t dir_mode;
758 static void *do_smb_super_data_conv(void *raw_data)
760 struct smb_mount_data *s = raw_data;
761 struct compat_smb_mount_data *c_s = raw_data;
763 if (c_s->version != SMB_MOUNT_OLDVERSION)
765 s->dir_mode = c_s->dir_mode;
766 s->file_mode = c_s->file_mode;
769 s->mounted_uid = c_s->mounted_uid;
774 struct compat_nfs_string {
779 static inline void compat_nfs_string(struct nfs_string *dst,
780 struct compat_nfs_string *src)
782 dst->data = compat_ptr(src->data);
786 struct compat_nfs4_mount_data_v1 {
787 compat_int_t version;
792 compat_int_t retrans;
793 compat_int_t acregmin;
794 compat_int_t acregmax;
795 compat_int_t acdirmin;
796 compat_int_t acdirmax;
797 struct compat_nfs_string client_addr;
798 struct compat_nfs_string mnt_path;
799 struct compat_nfs_string hostname;
800 compat_uint_t host_addrlen;
801 compat_uptr_t host_addr;
803 compat_int_t auth_flavourlen;
804 compat_uptr_t auth_flavours;
807 static int do_nfs4_super_data_conv(void *raw_data)
809 int version = *(compat_uint_t *) raw_data;
812 struct compat_nfs4_mount_data_v1 *raw = raw_data;
813 struct nfs4_mount_data *real = raw_data;
815 /* copy the fields backwards */
816 real->auth_flavours = compat_ptr(raw->auth_flavours);
817 real->auth_flavourlen = raw->auth_flavourlen;
818 real->proto = raw->proto;
819 real->host_addr = compat_ptr(raw->host_addr);
820 real->host_addrlen = raw->host_addrlen;
821 compat_nfs_string(&real->hostname, &raw->hostname);
822 compat_nfs_string(&real->mnt_path, &raw->mnt_path);
823 compat_nfs_string(&real->client_addr, &raw->client_addr);
824 real->acdirmax = raw->acdirmax;
825 real->acdirmin = raw->acdirmin;
826 real->acregmax = raw->acregmax;
827 real->acregmin = raw->acregmin;
828 real->retrans = raw->retrans;
829 real->timeo = raw->timeo;
830 real->wsize = raw->wsize;
831 real->rsize = raw->rsize;
832 real->flags = raw->flags;
833 real->version = raw->version;
842 #define SMBFS_NAME "smbfs"
843 #define NCPFS_NAME "ncpfs"
844 #define NFS4_NAME "nfs4"
846 asmlinkage long compat_sys_mount(char __user * dev_name, char __user * dir_name,
847 char __user * type, unsigned long flags,
850 unsigned long type_page;
851 unsigned long data_page;
852 unsigned long dev_page;
856 retval = copy_mount_options (type, &type_page);
860 dir_page = getname(dir_name);
861 retval = PTR_ERR(dir_page);
862 if (IS_ERR(dir_page))
865 retval = copy_mount_options (dev_name, &dev_page);
869 retval = copy_mount_options (data, &data_page);
875 if (type_page && data_page) {
876 if (!strcmp((char *)type_page, SMBFS_NAME)) {
877 do_smb_super_data_conv((void *)data_page);
878 } else if (!strcmp((char *)type_page, NCPFS_NAME)) {
879 do_ncp_super_data_conv((void *)data_page);
880 } else if (!strcmp((char *)type_page, NFS4_NAME)) {
881 if (do_nfs4_super_data_conv((void *) data_page))
887 retval = do_mount((char*)dev_page, dir_page, (char*)type_page,
888 flags, (void*)data_page);
892 free_page(data_page);
898 free_page(type_page);
903 #define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
904 #define COMPAT_ROUND_UP(x) (((x)+sizeof(compat_long_t)-1) & \
905 ~(sizeof(compat_long_t)-1))
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 = COMPAT_ROUND_UP(NAME_OFFSET(dirent) + namlen + 2);
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
1068 #define COMPAT_ROUND_UP64(x) (((x)+sizeof(u64)-1) & ~(sizeof(u64)-1))
1070 struct compat_getdents_callback64 {
1071 struct linux_dirent64 __user *current_dir;
1072 struct linux_dirent64 __user *previous;
1077 static int compat_filldir64(void * __buf, const char * name, int namlen, loff_t offset,
1078 u64 ino, unsigned int d_type)
1080 struct linux_dirent64 __user *dirent;
1081 struct compat_getdents_callback64 *buf = __buf;
1082 int jj = NAME_OFFSET(dirent);
1083 int reclen = COMPAT_ROUND_UP64(jj + namlen + 1);
1086 buf->error = -EINVAL; /* only used if we fail.. */
1087 if (reclen > buf->count)
1089 dirent = buf->previous;
1092 if (__put_user_unaligned(offset, &dirent->d_off))
1095 dirent = buf->current_dir;
1096 if (__put_user_unaligned(ino, &dirent->d_ino))
1099 if (__put_user_unaligned(off, &dirent->d_off))
1101 if (__put_user(reclen, &dirent->d_reclen))
1103 if (__put_user(d_type, &dirent->d_type))
1105 if (copy_to_user(dirent->d_name, name, namlen))
1107 if (__put_user(0, dirent->d_name + namlen))
1109 buf->previous = dirent;
1110 dirent = (void __user *)dirent + reclen;
1111 buf->current_dir = dirent;
1112 buf->count -= reclen;
1115 buf->error = -EFAULT;
1119 asmlinkage long compat_sys_getdents64(unsigned int fd,
1120 struct linux_dirent64 __user * dirent, unsigned int count)
1123 struct linux_dirent64 __user * lastdirent;
1124 struct compat_getdents_callback64 buf;
1128 if (!access_ok(VERIFY_WRITE, dirent, count))
1136 buf.current_dir = dirent;
1137 buf.previous = NULL;
1141 error = vfs_readdir(file, compat_filldir64, &buf);
1145 lastdirent = buf.previous;
1147 typeof(lastdirent->d_off) d_off = file->f_pos;
1149 if (__put_user_unaligned(d_off, &lastdirent->d_off))
1151 error = count - buf.count;
1159 #endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */
1161 static ssize_t compat_do_readv_writev(int type, struct file *file,
1162 const struct compat_iovec __user *uvector,
1163 unsigned long nr_segs, loff_t *pos)
1165 compat_ssize_t tot_len;
1166 struct iovec iovstack[UIO_FASTIOV];
1167 struct iovec *iov=iovstack, *vector;
1174 * SuS says "The readv() function *may* fail if the iovcnt argument
1175 * was less than or equal to 0, or greater than {IOV_MAX}. Linux has
1176 * traditionally returned zero for zero segments, so...
1183 * First get the "struct iovec" from user memory and
1184 * verify all the pointers
1187 if ((nr_segs > UIO_MAXIOV) || (nr_segs <= 0))
1191 if (nr_segs > UIO_FASTIOV) {
1193 iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL);
1198 if (!access_ok(VERIFY_READ, uvector, nr_segs*sizeof(*uvector)))
1202 * Single unix specification:
1203 * We should -EINVAL if an element length is not >= 0 and fitting an
1204 * ssize_t. The total length is fitting an ssize_t
1206 * Be careful here because iov_len is a size_t not an ssize_t
1211 for (seg = 0 ; seg < nr_segs; seg++) {
1212 compat_ssize_t tmp = tot_len;
1216 if (__get_user(len, &uvector->iov_len) ||
1217 __get_user(buf, &uvector->iov_base)) {
1221 if (len < 0) /* size_t not fitting an compat_ssize_t .. */
1224 if (tot_len < tmp) /* maths overflow on the compat_ssize_t */
1226 vector->iov_base = compat_ptr(buf);
1227 vector->iov_len = (compat_size_t) len;
1236 ret = rw_verify_area(type, file, pos, tot_len);
1240 ret = security_file_permission(file, type == READ ? MAY_READ:MAY_WRITE);
1246 fn = file->f_op->read;
1247 fnv = file->f_op->aio_read;
1249 fn = (io_fn_t)file->f_op->write;
1250 fnv = file->f_op->aio_write;
1254 ret = do_sync_readv_writev(file, iov, nr_segs, tot_len,
1257 ret = do_loop_readv_writev(file, iov, nr_segs, pos, fn);
1260 if (iov != iovstack)
1262 if ((ret + (type == READ)) > 0) {
1263 struct dentry *dentry = file->f_path.dentry;
1265 fsnotify_access(dentry);
1267 fsnotify_modify(dentry);
1273 compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen)
1276 ssize_t ret = -EBADF;
1282 if (!(file->f_mode & FMODE_READ))
1286 if (!file->f_op || (!file->f_op->aio_read && !file->f_op->read))
1289 ret = compat_do_readv_writev(READ, file, vec, vlen, &file->f_pos);
1297 compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen)
1300 ssize_t ret = -EBADF;
1305 if (!(file->f_mode & FMODE_WRITE))
1309 if (!file->f_op || (!file->f_op->aio_write && !file->f_op->write))
1312 ret = compat_do_readv_writev(WRITE, file, vec, vlen, &file->f_pos);
1320 compat_sys_vmsplice(int fd, const struct compat_iovec __user *iov32,
1321 unsigned int nr_segs, unsigned int flags)
1324 struct iovec __user *iov;
1325 if (nr_segs > UIO_MAXIOV)
1327 iov = compat_alloc_user_space(nr_segs * sizeof(struct iovec));
1328 for (i = 0; i < nr_segs; i++) {
1329 struct compat_iovec v;
1330 if (get_user(v.iov_base, &iov32[i].iov_base) ||
1331 get_user(v.iov_len, &iov32[i].iov_len) ||
1332 put_user(compat_ptr(v.iov_base), &iov[i].iov_base) ||
1333 put_user(v.iov_len, &iov[i].iov_len))
1336 return sys_vmsplice(fd, iov, nr_segs, flags);
1340 * Exactly like fs/open.c:sys_open(), except that it doesn't set the
1344 compat_sys_open(const char __user *filename, int flags, int mode)
1346 return do_sys_open(AT_FDCWD, filename, flags, mode);
1350 * Exactly like fs/open.c:sys_openat(), except that it doesn't set the
1354 compat_sys_openat(unsigned int dfd, const char __user *filename, int flags, int mode)
1356 return do_sys_open(dfd, filename, flags, mode);
1360 * compat_count() counts the number of arguments/envelopes. It is basically
1361 * a copy of count() from fs/exec.c, except that it works with 32 bit argv
1362 * and envp pointers.
1364 static int compat_count(compat_uptr_t __user *argv, int max)
1372 if (get_user(p, argv))
1385 * compat_copy_strings() is basically a copy of copy_strings() from fs/exec.c
1386 * except that it works with 32 bit argv and envp pointers.
1388 static int compat_copy_strings(int argc, compat_uptr_t __user *argv,
1389 struct linux_binprm *bprm)
1391 struct page *kmapped_page = NULL;
1395 while (argc-- > 0) {
1400 if (get_user(str, argv+argc) ||
1401 !(len = strnlen_user(compat_ptr(str), bprm->p))) {
1406 if (bprm->p < len) {
1412 /* XXX: add architecture specific overflow check here. */
1417 int offset, bytes_to_copy;
1420 offset = pos % PAGE_SIZE;
1422 page = bprm->page[i];
1425 page = alloc_page(GFP_HIGHUSER);
1426 bprm->page[i] = page;
1434 if (page != kmapped_page) {
1436 kunmap(kmapped_page);
1437 kmapped_page = page;
1438 kaddr = kmap(kmapped_page);
1441 memset(kaddr, 0, offset);
1442 bytes_to_copy = PAGE_SIZE - offset;
1443 if (bytes_to_copy > len) {
1444 bytes_to_copy = len;
1446 memset(kaddr+offset+len, 0,
1447 PAGE_SIZE-offset-len);
1449 err = copy_from_user(kaddr+offset, compat_ptr(str),
1456 pos += bytes_to_copy;
1457 str += bytes_to_copy;
1458 len -= bytes_to_copy;
1464 kunmap(kmapped_page);
1470 #define free_arg_pages(bprm) do { } while (0)
1474 static inline void free_arg_pages(struct linux_binprm *bprm)
1478 for (i = 0; i < MAX_ARG_PAGES; i++) {
1480 __free_page(bprm->page[i]);
1481 bprm->page[i] = NULL;
1485 #endif /* CONFIG_MMU */
1488 * compat_do_execve() is mostly a copy of do_execve(), with the exception
1489 * that it processes 32 bit argv and envp pointers.
1491 int compat_do_execve(char * filename,
1492 compat_uptr_t __user *argv,
1493 compat_uptr_t __user *envp,
1494 struct pt_regs * regs)
1496 struct linux_binprm *bprm;
1502 bprm = kzalloc(sizeof(*bprm), GFP_KERNEL);
1506 file = open_exec(filename);
1507 retval = PTR_ERR(file);
1513 bprm->p = PAGE_SIZE*MAX_ARG_PAGES-sizeof(void *);
1515 bprm->filename = filename;
1516 bprm->interp = filename;
1517 bprm->mm = mm_alloc();
1522 retval = init_new_context(current, bprm->mm);
1526 bprm->argc = compat_count(argv, bprm->p / sizeof(compat_uptr_t));
1527 if ((retval = bprm->argc) < 0)
1530 bprm->envc = compat_count(envp, bprm->p / sizeof(compat_uptr_t));
1531 if ((retval = bprm->envc) < 0)
1534 retval = security_bprm_alloc(bprm);
1538 retval = prepare_binprm(bprm);
1542 retval = copy_strings_kernel(1, &bprm->filename, bprm);
1546 bprm->exec = bprm->p;
1547 retval = compat_copy_strings(bprm->envc, envp, bprm);
1551 retval = compat_copy_strings(bprm->argc, argv, bprm);
1555 retval = search_binary_handler(bprm, regs);
1557 free_arg_pages(bprm);
1559 /* execve success */
1560 security_bprm_free(bprm);
1561 acct_update_integrals(current);
1567 /* Something went wrong, return the inode and free the argument pages*/
1568 for (i = 0 ; i < MAX_ARG_PAGES ; i++) {
1569 struct page * page = bprm->page[i];
1575 security_bprm_free(bprm);
1583 allow_write_access(bprm->file);
1594 #define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t))
1596 #define ROUND_UP(x,y) (((x)+(y)-1)/(y))
1599 * Ooo, nasty. We need here to frob 32-bit unsigned longs to
1600 * 64-bit unsigned longs.
1603 int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
1604 unsigned long *fdset)
1606 nr = ROUND_UP(nr, __COMPAT_NFDBITS);
1610 if (!access_ok(VERIFY_WRITE, ufdset, nr*sizeof(compat_ulong_t)))
1617 if (__get_user(l, ufdset) || __get_user(h, ufdset+1))
1620 *fdset++ = h << 32 | l;
1623 if (odd && __get_user(*fdset, ufdset))
1626 /* Tricky, must clear full unsigned long in the
1627 * kernel fdset at the end, this makes sure that
1630 memset(fdset, 0, ((nr + 1) & ~1)*sizeof(compat_ulong_t));
1636 int compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
1637 unsigned long *fdset)
1640 nr = ROUND_UP(nr, __COMPAT_NFDBITS);
1651 if (__put_user(l, ufdset) || __put_user(h, ufdset+1))
1656 if (odd && __put_user(*fdset, ufdset))
1663 * This is a virtual copy of sys_select from fs/select.c and probably
1664 * should be compared to it from time to time
1668 * We can actually return ERESTARTSYS instead of EINTR, but I'd
1669 * like to be certain this leads to no problems. So I return
1670 * EINTR just for safety.
1672 * Update: ERESTARTSYS breaks at least the xview clock binary, so
1673 * I'm trying ERESTARTNOHAND which restart only when you want to.
1675 #define MAX_SELECT_SECONDS \
1676 ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1)
1678 int compat_core_sys_select(int n, compat_ulong_t __user *inp,
1679 compat_ulong_t __user *outp, compat_ulong_t __user *exp, s64 *timeout)
1683 int size, max_fds, ret = -EINVAL;
1684 struct fdtable *fdt;
1689 /* max_fds can increase, so grab it once to avoid race */
1691 fdt = files_fdtable(current->files);
1692 max_fds = fdt->max_fds;
1698 * We need 6 bitmaps (in/out/ex for both incoming and outgoing),
1699 * since we used fdset we need to allocate memory in units of
1703 size = FDS_BYTES(n);
1704 bits = kmalloc(6 * size, GFP_KERNEL);
1707 fds.in = (unsigned long *) bits;
1708 fds.out = (unsigned long *) (bits + size);
1709 fds.ex = (unsigned long *) (bits + 2*size);
1710 fds.res_in = (unsigned long *) (bits + 3*size);
1711 fds.res_out = (unsigned long *) (bits + 4*size);
1712 fds.res_ex = (unsigned long *) (bits + 5*size);
1714 if ((ret = compat_get_fd_set(n, inp, fds.in)) ||
1715 (ret = compat_get_fd_set(n, outp, fds.out)) ||
1716 (ret = compat_get_fd_set(n, exp, fds.ex)))
1718 zero_fd_set(n, fds.res_in);
1719 zero_fd_set(n, fds.res_out);
1720 zero_fd_set(n, fds.res_ex);
1722 ret = do_select(n, &fds, timeout);
1727 ret = -ERESTARTNOHAND;
1728 if (signal_pending(current))
1733 if (compat_set_fd_set(n, inp, fds.res_in) ||
1734 compat_set_fd_set(n, outp, fds.res_out) ||
1735 compat_set_fd_set(n, exp, fds.res_ex))
1743 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
1744 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1745 struct compat_timeval __user *tvp)
1748 struct compat_timeval tv;
1752 if (copy_from_user(&tv, tvp, sizeof(tv)))
1755 if (tv.tv_sec < 0 || tv.tv_usec < 0)
1758 /* Cast to u64 to make GCC stop complaining */
1759 if ((u64)tv.tv_sec >= (u64)MAX_INT64_SECONDS)
1760 timeout = -1; /* infinite */
1762 timeout = ROUND_UP(tv.tv_usec, 1000000/HZ);
1763 timeout += tv.tv_sec * HZ;
1767 ret = compat_core_sys_select(n, inp, outp, exp, &timeout);
1770 struct compat_timeval rtv;
1772 if (current->personality & STICKY_TIMEOUTS)
1774 rtv.tv_usec = jiffies_to_usecs(do_div((*(u64*)&timeout), HZ));
1775 rtv.tv_sec = timeout;
1776 if (compat_timeval_compare(&rtv, &tv) >= 0)
1778 if (copy_to_user(tvp, &rtv, sizeof(rtv))) {
1781 * If an application puts its timeval in read-only
1782 * memory, we don't want the Linux-specific update to
1783 * the timeval to cause a fault after the select has
1784 * completed successfully. However, because we're not
1785 * updating the timeval, we can't restart the system
1788 if (ret == -ERESTARTNOHAND)
1796 #ifdef TIF_RESTORE_SIGMASK
1797 asmlinkage long compat_sys_pselect7(int n, compat_ulong_t __user *inp,
1798 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1799 struct compat_timespec __user *tsp, compat_sigset_t __user *sigmask,
1800 compat_size_t sigsetsize)
1802 compat_sigset_t ss32;
1803 sigset_t ksigmask, sigsaved;
1804 s64 timeout = MAX_SCHEDULE_TIMEOUT;
1805 struct compat_timespec ts;
1809 if (copy_from_user(&ts, tsp, sizeof(ts)))
1812 if (ts.tv_sec < 0 || ts.tv_nsec < 0)
1817 if (sigsetsize != sizeof(compat_sigset_t))
1819 if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
1821 sigset_from_compat(&ksigmask, &ss32);
1823 sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP));
1824 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
1829 if ((unsigned long)ts.tv_sec < MAX_SELECT_SECONDS) {
1830 timeout = ROUND_UP(ts.tv_nsec, 1000000000/HZ);
1831 timeout += ts.tv_sec * (unsigned long)HZ;
1835 ts.tv_sec -= MAX_SELECT_SECONDS;
1836 timeout = MAX_SELECT_SECONDS * HZ;
1840 ret = compat_core_sys_select(n, inp, outp, exp, &timeout);
1842 } while (!ret && !timeout && tsp && (ts.tv_sec || ts.tv_nsec));
1845 struct compat_timespec rts;
1847 if (current->personality & STICKY_TIMEOUTS)
1850 rts.tv_sec = timeout / HZ;
1851 rts.tv_nsec = (timeout % HZ) * (NSEC_PER_SEC/HZ);
1852 if (rts.tv_nsec >= NSEC_PER_SEC) {
1854 rts.tv_nsec -= NSEC_PER_SEC;
1856 if (compat_timespec_compare(&rts, &ts) >= 0)
1858 if (copy_to_user(tsp, &rts, sizeof(rts))) {
1861 * If an application puts its timeval in read-only
1862 * memory, we don't want the Linux-specific update to
1863 * the timeval to cause a fault after the select has
1864 * completed successfully. However, because we're not
1865 * updating the timeval, we can't restart the system
1868 if (ret == -ERESTARTNOHAND)
1873 if (ret == -ERESTARTNOHAND) {
1875 * Don't restore the signal mask yet. Let do_signal() deliver
1876 * the signal on the way back to userspace, before the signal
1880 memcpy(¤t->saved_sigmask, &sigsaved,
1882 set_thread_flag(TIF_RESTORE_SIGMASK);
1885 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
1890 asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp,
1891 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1892 struct compat_timespec __user *tsp, void __user *sig)
1894 compat_size_t sigsetsize = 0;
1895 compat_uptr_t up = 0;
1898 if (!access_ok(VERIFY_READ, sig,
1899 sizeof(compat_uptr_t)+sizeof(compat_size_t)) ||
1900 __get_user(up, (compat_uptr_t __user *)sig) ||
1901 __get_user(sigsetsize,
1902 (compat_size_t __user *)(sig+sizeof(up))))
1905 return compat_sys_pselect7(n, inp, outp, exp, tsp, compat_ptr(up),
1909 asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
1910 unsigned int nfds, struct compat_timespec __user *tsp,
1911 const compat_sigset_t __user *sigmask, compat_size_t sigsetsize)
1913 compat_sigset_t ss32;
1914 sigset_t ksigmask, sigsaved;
1915 struct compat_timespec ts;
1920 if (copy_from_user(&ts, tsp, sizeof(ts)))
1923 /* We assume that ts.tv_sec is always lower than
1924 the number of seconds that can be expressed in
1925 an s64. Otherwise the compiler bitches at us */
1926 timeout = ROUND_UP(ts.tv_nsec, 1000000000/HZ);
1927 timeout += ts.tv_sec * HZ;
1931 if (sigsetsize != sizeof(compat_sigset_t))
1933 if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
1935 sigset_from_compat(&ksigmask, &ss32);
1937 sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP));
1938 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
1941 ret = do_sys_poll(ufds, nfds, &timeout);
1943 /* We can restart this syscall, usually */
1944 if (ret == -EINTR) {
1946 * Don't restore the signal mask yet. Let do_signal() deliver
1947 * the signal on the way back to userspace, before the signal
1951 memcpy(¤t->saved_sigmask, &sigsaved,
1953 set_thread_flag(TIF_RESTORE_SIGMASK);
1955 ret = -ERESTARTNOHAND;
1957 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
1959 if (tsp && timeout >= 0) {
1960 struct compat_timespec rts;
1962 if (current->personality & STICKY_TIMEOUTS)
1964 /* Yes, we know it's actually an s64, but it's also positive. */
1965 rts.tv_nsec = jiffies_to_usecs(do_div((*(u64*)&timeout), HZ)) *
1967 rts.tv_sec = timeout;
1968 if (compat_timespec_compare(&rts, &ts) >= 0)
1970 if (copy_to_user(tsp, &rts, sizeof(rts))) {
1973 * If an application puts its timeval in read-only
1974 * memory, we don't want the Linux-specific update to
1975 * the timeval to cause a fault after the select has
1976 * completed successfully. However, because we're not
1977 * updating the timeval, we can't restart the system
1980 if (ret == -ERESTARTNOHAND && timeout >= 0)
1987 #endif /* TIF_RESTORE_SIGMASK */
1989 #if defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE)
1990 /* Stuff for NFS server syscalls... */
1991 struct compat_nfsctl_svc {
1996 struct compat_nfsctl_client {
1997 s8 cl32_ident[NFSCLNT_IDMAX+1];
1999 struct in_addr cl32_addrlist[NFSCLNT_ADDRMAX];
2002 u8 cl32_fhkey[NFSCLNT_KEYMAX];
2005 struct compat_nfsctl_export {
2006 char ex32_client[NFSCLNT_IDMAX+1];
2007 char ex32_path[NFS_MAXPATHLEN+1];
2008 compat_dev_t ex32_dev;
2009 compat_ino_t ex32_ino;
2010 compat_int_t ex32_flags;
2011 __compat_uid_t ex32_anon_uid;
2012 __compat_gid_t ex32_anon_gid;
2015 struct compat_nfsctl_fdparm {
2016 struct sockaddr gd32_addr;
2017 s8 gd32_path[NFS_MAXPATHLEN+1];
2018 compat_int_t gd32_version;
2021 struct compat_nfsctl_fsparm {
2022 struct sockaddr gd32_addr;
2023 s8 gd32_path[NFS_MAXPATHLEN+1];
2024 compat_int_t gd32_maxlen;
2027 struct compat_nfsctl_arg {
2028 compat_int_t ca32_version; /* safeguard */
2030 struct compat_nfsctl_svc u32_svc;
2031 struct compat_nfsctl_client u32_client;
2032 struct compat_nfsctl_export u32_export;
2033 struct compat_nfsctl_fdparm u32_getfd;
2034 struct compat_nfsctl_fsparm u32_getfs;
2036 #define ca32_svc u.u32_svc
2037 #define ca32_client u.u32_client
2038 #define ca32_export u.u32_export
2039 #define ca32_getfd u.u32_getfd
2040 #define ca32_getfs u.u32_getfs
2043 union compat_nfsctl_res {
2044 __u8 cr32_getfh[NFS_FHSIZE];
2045 struct knfsd_fh cr32_getfs;
2048 static int compat_nfs_svc_trans(struct nfsctl_arg *karg,
2049 struct compat_nfsctl_arg __user *arg)
2051 if (!access_ok(VERIFY_READ, &arg->ca32_svc, sizeof(arg->ca32_svc)) ||
2052 get_user(karg->ca_version, &arg->ca32_version) ||
2053 __get_user(karg->ca_svc.svc_port, &arg->ca32_svc.svc32_port) ||
2054 __get_user(karg->ca_svc.svc_nthreads,
2055 &arg->ca32_svc.svc32_nthreads))
2060 static int compat_nfs_clnt_trans(struct nfsctl_arg *karg,
2061 struct compat_nfsctl_arg __user *arg)
2063 if (!access_ok(VERIFY_READ, &arg->ca32_client,
2064 sizeof(arg->ca32_client)) ||
2065 get_user(karg->ca_version, &arg->ca32_version) ||
2066 __copy_from_user(&karg->ca_client.cl_ident[0],
2067 &arg->ca32_client.cl32_ident[0],
2069 __get_user(karg->ca_client.cl_naddr,
2070 &arg->ca32_client.cl32_naddr) ||
2071 __copy_from_user(&karg->ca_client.cl_addrlist[0],
2072 &arg->ca32_client.cl32_addrlist[0],
2073 (sizeof(struct in_addr) * NFSCLNT_ADDRMAX)) ||
2074 __get_user(karg->ca_client.cl_fhkeytype,
2075 &arg->ca32_client.cl32_fhkeytype) ||
2076 __get_user(karg->ca_client.cl_fhkeylen,
2077 &arg->ca32_client.cl32_fhkeylen) ||
2078 __copy_from_user(&karg->ca_client.cl_fhkey[0],
2079 &arg->ca32_client.cl32_fhkey[0],
2086 static int compat_nfs_exp_trans(struct nfsctl_arg *karg,
2087 struct compat_nfsctl_arg __user *arg)
2089 if (!access_ok(VERIFY_READ, &arg->ca32_export,
2090 sizeof(arg->ca32_export)) ||
2091 get_user(karg->ca_version, &arg->ca32_version) ||
2092 __copy_from_user(&karg->ca_export.ex_client[0],
2093 &arg->ca32_export.ex32_client[0],
2095 __copy_from_user(&karg->ca_export.ex_path[0],
2096 &arg->ca32_export.ex32_path[0],
2098 __get_user(karg->ca_export.ex_dev,
2099 &arg->ca32_export.ex32_dev) ||
2100 __get_user(karg->ca_export.ex_ino,
2101 &arg->ca32_export.ex32_ino) ||
2102 __get_user(karg->ca_export.ex_flags,
2103 &arg->ca32_export.ex32_flags) ||
2104 __get_user(karg->ca_export.ex_anon_uid,
2105 &arg->ca32_export.ex32_anon_uid) ||
2106 __get_user(karg->ca_export.ex_anon_gid,
2107 &arg->ca32_export.ex32_anon_gid))
2109 SET_UID(karg->ca_export.ex_anon_uid, karg->ca_export.ex_anon_uid);
2110 SET_GID(karg->ca_export.ex_anon_gid, karg->ca_export.ex_anon_gid);
2115 static int compat_nfs_getfd_trans(struct nfsctl_arg *karg,
2116 struct compat_nfsctl_arg __user *arg)
2118 if (!access_ok(VERIFY_READ, &arg->ca32_getfd,
2119 sizeof(arg->ca32_getfd)) ||
2120 get_user(karg->ca_version, &arg->ca32_version) ||
2121 __copy_from_user(&karg->ca_getfd.gd_addr,
2122 &arg->ca32_getfd.gd32_addr,
2123 (sizeof(struct sockaddr))) ||
2124 __copy_from_user(&karg->ca_getfd.gd_path,
2125 &arg->ca32_getfd.gd32_path,
2126 (NFS_MAXPATHLEN+1)) ||
2127 __get_user(karg->ca_getfd.gd_version,
2128 &arg->ca32_getfd.gd32_version))
2134 static int compat_nfs_getfs_trans(struct nfsctl_arg *karg,
2135 struct compat_nfsctl_arg __user *arg)
2137 if (!access_ok(VERIFY_READ,&arg->ca32_getfs,sizeof(arg->ca32_getfs)) ||
2138 get_user(karg->ca_version, &arg->ca32_version) ||
2139 __copy_from_user(&karg->ca_getfs.gd_addr,
2140 &arg->ca32_getfs.gd32_addr,
2141 (sizeof(struct sockaddr))) ||
2142 __copy_from_user(&karg->ca_getfs.gd_path,
2143 &arg->ca32_getfs.gd32_path,
2144 (NFS_MAXPATHLEN+1)) ||
2145 __get_user(karg->ca_getfs.gd_maxlen,
2146 &arg->ca32_getfs.gd32_maxlen))
2152 /* This really doesn't need translations, we are only passing
2153 * back a union which contains opaque nfs file handle data.
2155 static int compat_nfs_getfh_res_trans(union nfsctl_res *kres,
2156 union compat_nfsctl_res __user *res)
2160 err = copy_to_user(res, kres, sizeof(*res));
2162 return (err) ? -EFAULT : 0;
2165 asmlinkage long compat_sys_nfsservctl(int cmd,
2166 struct compat_nfsctl_arg __user *arg,
2167 union compat_nfsctl_res __user *res)
2169 struct nfsctl_arg *karg;
2170 union nfsctl_res *kres;
2174 karg = kmalloc(sizeof(*karg), GFP_USER);
2175 kres = kmalloc(sizeof(*kres), GFP_USER);
2176 if(!karg || !kres) {
2183 err = compat_nfs_svc_trans(karg, arg);
2186 case NFSCTL_ADDCLIENT:
2187 err = compat_nfs_clnt_trans(karg, arg);
2190 case NFSCTL_DELCLIENT:
2191 err = compat_nfs_clnt_trans(karg, arg);
2195 case NFSCTL_UNEXPORT:
2196 err = compat_nfs_exp_trans(karg, arg);
2200 err = compat_nfs_getfd_trans(karg, arg);
2204 err = compat_nfs_getfs_trans(karg, arg);
2217 /* The __user pointer casts are valid because of the set_fs() */
2218 err = sys_nfsservctl(cmd, (void __user *) karg, (void __user *) kres);
2224 if((cmd == NFSCTL_GETFD) ||
2225 (cmd == NFSCTL_GETFS))
2226 err = compat_nfs_getfh_res_trans(kres, res);
2234 long asmlinkage compat_sys_nfsservctl(int cmd, void *notused, void *notused2)
2236 return sys_ni_syscall();
2242 #ifdef CONFIG_HAS_COMPAT_EPOLL_EVENT
2243 asmlinkage long compat_sys_epoll_ctl(int epfd, int op, int fd,
2244 struct compat_epoll_event __user *event)
2247 struct compat_epoll_event user;
2248 struct epoll_event __user *kernel = NULL;
2251 if (copy_from_user(&user, event, sizeof(user)))
2253 kernel = compat_alloc_user_space(sizeof(struct epoll_event));
2254 err |= __put_user(user.events, &kernel->events);
2255 err |= __put_user(user.data, &kernel->data);
2258 return err ? err : sys_epoll_ctl(epfd, op, fd, kernel);
2262 asmlinkage long compat_sys_epoll_wait(int epfd,
2263 struct compat_epoll_event __user *events,
2264 int maxevents, int timeout)
2266 long i, ret, err = 0;
2267 struct epoll_event __user *kbuf;
2268 struct epoll_event ev;
2270 if ((maxevents <= 0) ||
2271 (maxevents > (INT_MAX / sizeof(struct epoll_event))))
2273 kbuf = compat_alloc_user_space(sizeof(struct epoll_event) * maxevents);
2274 ret = sys_epoll_wait(epfd, kbuf, maxevents, timeout);
2275 for (i = 0; i < ret; i++) {
2276 err |= __get_user(ev.events, &kbuf[i].events);
2277 err |= __get_user(ev.data, &kbuf[i].data);
2278 err |= __put_user(ev.events, &events->events);
2279 err |= __put_user_unaligned(ev.data, &events->data);
2283 return err ? -EFAULT: ret;
2285 #endif /* CONFIG_HAS_COMPAT_EPOLL_EVENT */
2287 #ifdef TIF_RESTORE_SIGMASK
2288 asmlinkage long compat_sys_epoll_pwait(int epfd,
2289 struct compat_epoll_event __user *events,
2290 int maxevents, int timeout,
2291 const compat_sigset_t __user *sigmask,
2292 compat_size_t sigsetsize)
2295 compat_sigset_t csigmask;
2296 sigset_t ksigmask, sigsaved;
2299 * If the caller wants a certain signal mask to be set during the wait,
2303 if (sigsetsize != sizeof(compat_sigset_t))
2305 if (copy_from_user(&csigmask, sigmask, sizeof(csigmask)))
2307 sigset_from_compat(&ksigmask, &csigmask);
2308 sigdelsetmask(&ksigmask, sigmask(SIGKILL) | sigmask(SIGSTOP));
2309 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
2312 #ifdef CONFIG_HAS_COMPAT_EPOLL_EVENT
2313 err = compat_sys_epoll_wait(epfd, events, maxevents, timeout);
2315 err = sys_epoll_wait(epfd, events, maxevents, timeout);
2319 * If we changed the signal mask, we need to restore the original one.
2320 * In case we've got a signal while waiting, we do not restore the
2321 * signal mask yet, and we allow do_signal() to deliver the signal on
2322 * the way back to userspace, before the signal mask is restored.
2325 if (err == -EINTR) {
2326 memcpy(¤t->saved_sigmask, &sigsaved,
2328 set_thread_flag(TIF_RESTORE_SIGMASK);
2330 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
2335 #endif /* TIF_RESTORE_SIGMASK */
2337 #endif /* CONFIG_EPOLL */