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/fdtable.h>
28 #include <linux/vfs.h>
29 #include <linux/ioctl.h>
30 #include <linux/init.h>
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/security.h>
49 #include <linux/highmem.h>
50 #include <linux/signal.h>
51 #include <linux/poll.h>
53 #include <linux/eventpoll.h>
54 #include <linux/fs_struct.h>
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)
83 struct timespec tv[2];
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, 0);
95 asmlinkage long compat_sys_utimensat(unsigned int dfd, char __user *filename, struct compat_timespec __user *t, int flags)
97 struct timespec tv[2];
100 if (get_compat_timespec(&tv[0], &t[0]) ||
101 get_compat_timespec(&tv[1], &t[1]))
104 if ((tv[0].tv_nsec == UTIME_OMIT || tv[0].tv_nsec == UTIME_NOW)
105 && tv[0].tv_sec != 0)
107 if ((tv[1].tv_nsec == UTIME_OMIT || tv[1].tv_nsec == UTIME_NOW)
108 && tv[1].tv_sec != 0)
111 if (tv[0].tv_nsec == UTIME_OMIT && tv[1].tv_nsec == UTIME_OMIT)
114 return do_utimes(dfd, filename, t ? tv : NULL, flags);
117 asmlinkage long compat_sys_futimesat(unsigned int dfd, char __user *filename, struct compat_timeval __user *t)
119 struct timespec tv[2];
122 if (get_user(tv[0].tv_sec, &t[0].tv_sec) ||
123 get_user(tv[0].tv_nsec, &t[0].tv_usec) ||
124 get_user(tv[1].tv_sec, &t[1].tv_sec) ||
125 get_user(tv[1].tv_nsec, &t[1].tv_usec))
127 if (tv[0].tv_nsec >= 1000000 || tv[0].tv_nsec < 0 ||
128 tv[1].tv_nsec >= 1000000 || tv[1].tv_nsec < 0)
130 tv[0].tv_nsec *= 1000;
131 tv[1].tv_nsec *= 1000;
133 return do_utimes(dfd, filename, t ? tv : NULL, 0);
136 asmlinkage long compat_sys_utimes(char __user *filename, struct compat_timeval __user *t)
138 return compat_sys_futimesat(AT_FDCWD, filename, t);
141 static int cp_compat_stat(struct kstat *stat, struct compat_stat __user *ubuf)
143 compat_ino_t ino = stat->ino;
144 typeof(ubuf->st_uid) uid = 0;
145 typeof(ubuf->st_gid) gid = 0;
148 SET_UID(uid, stat->uid);
149 SET_GID(gid, stat->gid);
151 if ((u64) stat->size > MAX_NON_LFS ||
152 !old_valid_dev(stat->dev) ||
153 !old_valid_dev(stat->rdev))
155 if (sizeof(ino) < sizeof(stat->ino) && ino != stat->ino)
158 if (clear_user(ubuf, sizeof(*ubuf)))
161 err = __put_user(old_encode_dev(stat->dev), &ubuf->st_dev);
162 err |= __put_user(ino, &ubuf->st_ino);
163 err |= __put_user(stat->mode, &ubuf->st_mode);
164 err |= __put_user(stat->nlink, &ubuf->st_nlink);
165 err |= __put_user(uid, &ubuf->st_uid);
166 err |= __put_user(gid, &ubuf->st_gid);
167 err |= __put_user(old_encode_dev(stat->rdev), &ubuf->st_rdev);
168 err |= __put_user(stat->size, &ubuf->st_size);
169 err |= __put_user(stat->atime.tv_sec, &ubuf->st_atime);
170 err |= __put_user(stat->atime.tv_nsec, &ubuf->st_atime_nsec);
171 err |= __put_user(stat->mtime.tv_sec, &ubuf->st_mtime);
172 err |= __put_user(stat->mtime.tv_nsec, &ubuf->st_mtime_nsec);
173 err |= __put_user(stat->ctime.tv_sec, &ubuf->st_ctime);
174 err |= __put_user(stat->ctime.tv_nsec, &ubuf->st_ctime_nsec);
175 err |= __put_user(stat->blksize, &ubuf->st_blksize);
176 err |= __put_user(stat->blocks, &ubuf->st_blocks);
180 asmlinkage long compat_sys_newstat(char __user * filename,
181 struct compat_stat __user *statbuf)
186 error = vfs_stat(filename, &stat);
189 return cp_compat_stat(&stat, statbuf);
192 asmlinkage long compat_sys_newlstat(char __user * filename,
193 struct compat_stat __user *statbuf)
198 error = vfs_lstat(filename, &stat);
201 return cp_compat_stat(&stat, statbuf);
204 #ifndef __ARCH_WANT_STAT64
205 asmlinkage long compat_sys_newfstatat(unsigned int dfd, char __user *filename,
206 struct compat_stat __user *statbuf, int flag)
211 error = vfs_fstatat(dfd, filename, &stat, flag);
214 return cp_compat_stat(&stat, statbuf);
218 asmlinkage long compat_sys_newfstat(unsigned int fd,
219 struct compat_stat __user * statbuf)
222 int error = vfs_fstat(fd, &stat);
225 error = cp_compat_stat(&stat, statbuf);
229 static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *kbuf)
232 if (sizeof ubuf->f_blocks == 4) {
233 if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail |
234 kbuf->f_bsize | kbuf->f_frsize) & 0xffffffff00000000ULL)
236 /* f_files and f_ffree may be -1; it's okay
237 * to stuff that into 32 bits */
238 if (kbuf->f_files != 0xffffffffffffffffULL
239 && (kbuf->f_files & 0xffffffff00000000ULL))
241 if (kbuf->f_ffree != 0xffffffffffffffffULL
242 && (kbuf->f_ffree & 0xffffffff00000000ULL))
245 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
246 __put_user(kbuf->f_type, &ubuf->f_type) ||
247 __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
248 __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
249 __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
250 __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
251 __put_user(kbuf->f_files, &ubuf->f_files) ||
252 __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
253 __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
254 __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
255 __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
256 __put_user(kbuf->f_frsize, &ubuf->f_frsize) ||
257 __put_user(0, &ubuf->f_spare[0]) ||
258 __put_user(0, &ubuf->f_spare[1]) ||
259 __put_user(0, &ubuf->f_spare[2]) ||
260 __put_user(0, &ubuf->f_spare[3]) ||
261 __put_user(0, &ubuf->f_spare[4]))
267 * The following statfs calls are copies of code from fs/open.c and
268 * should be checked against those from time to time
270 asmlinkage long compat_sys_statfs(const char __user *pathname, struct compat_statfs __user *buf)
275 error = user_path(pathname, &path);
278 error = vfs_statfs(path.dentry, &tmp);
280 error = put_compat_statfs(buf, &tmp);
286 asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user *buf)
296 error = vfs_statfs(file->f_path.dentry, &tmp);
298 error = put_compat_statfs(buf, &tmp);
304 static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf)
306 if (sizeof ubuf->f_blocks == 4) {
307 if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail |
308 kbuf->f_bsize | kbuf->f_frsize) & 0xffffffff00000000ULL)
310 /* f_files and f_ffree may be -1; it's okay
311 * to stuff that into 32 bits */
312 if (kbuf->f_files != 0xffffffffffffffffULL
313 && (kbuf->f_files & 0xffffffff00000000ULL))
315 if (kbuf->f_ffree != 0xffffffffffffffffULL
316 && (kbuf->f_ffree & 0xffffffff00000000ULL))
319 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
320 __put_user(kbuf->f_type, &ubuf->f_type) ||
321 __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
322 __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
323 __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
324 __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
325 __put_user(kbuf->f_files, &ubuf->f_files) ||
326 __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
327 __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
328 __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
329 __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
330 __put_user(kbuf->f_frsize, &ubuf->f_frsize))
335 asmlinkage long compat_sys_statfs64(const char __user *pathname, compat_size_t sz, struct compat_statfs64 __user *buf)
340 if (sz != sizeof(*buf))
343 error = user_path(pathname, &path);
346 error = vfs_statfs(path.dentry, &tmp);
348 error = put_compat_statfs64(buf, &tmp);
354 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, struct compat_statfs64 __user *buf)
360 if (sz != sizeof(*buf))
367 error = vfs_statfs(file->f_path.dentry, &tmp);
369 error = put_compat_statfs64(buf, &tmp);
376 * This is a copy of sys_ustat, just dealing with a structure layout.
377 * Given how simple this syscall is that apporach is more maintainable
378 * than the various conversion hacks.
380 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u)
382 struct super_block *sb;
383 struct compat_ustat tmp;
387 sb = user_get_super(new_decode_dev(dev));
390 err = vfs_statfs(sb->s_root, &sbuf);
395 memset(&tmp, 0, sizeof(struct compat_ustat));
396 tmp.f_tfree = sbuf.f_bfree;
397 tmp.f_tinode = sbuf.f_ffree;
398 if (copy_to_user(u, &tmp, sizeof(struct compat_ustat)))
403 static int get_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
405 if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
406 __get_user(kfl->l_type, &ufl->l_type) ||
407 __get_user(kfl->l_whence, &ufl->l_whence) ||
408 __get_user(kfl->l_start, &ufl->l_start) ||
409 __get_user(kfl->l_len, &ufl->l_len) ||
410 __get_user(kfl->l_pid, &ufl->l_pid))
415 static int put_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
417 if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
418 __put_user(kfl->l_type, &ufl->l_type) ||
419 __put_user(kfl->l_whence, &ufl->l_whence) ||
420 __put_user(kfl->l_start, &ufl->l_start) ||
421 __put_user(kfl->l_len, &ufl->l_len) ||
422 __put_user(kfl->l_pid, &ufl->l_pid))
427 #ifndef HAVE_ARCH_GET_COMPAT_FLOCK64
428 static int get_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
430 if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
431 __get_user(kfl->l_type, &ufl->l_type) ||
432 __get_user(kfl->l_whence, &ufl->l_whence) ||
433 __get_user(kfl->l_start, &ufl->l_start) ||
434 __get_user(kfl->l_len, &ufl->l_len) ||
435 __get_user(kfl->l_pid, &ufl->l_pid))
441 #ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64
442 static int put_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
444 if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
445 __put_user(kfl->l_type, &ufl->l_type) ||
446 __put_user(kfl->l_whence, &ufl->l_whence) ||
447 __put_user(kfl->l_start, &ufl->l_start) ||
448 __put_user(kfl->l_len, &ufl->l_len) ||
449 __put_user(kfl->l_pid, &ufl->l_pid))
455 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
466 ret = get_compat_flock(&f, compat_ptr(arg));
471 ret = sys_fcntl(fd, cmd, (unsigned long)&f);
473 if (cmd == F_GETLK && ret == 0) {
474 /* GETLK was successfule and we need to return the data...
475 * but it needs to fit in the compat structure.
476 * l_start shouldn't be too big, unless the original
477 * start + end is greater than COMPAT_OFF_T_MAX, in which
478 * case the app was asking for trouble, so we return
479 * -EOVERFLOW in that case.
480 * l_len could be too big, in which case we just truncate it,
481 * and only allow the app to see that part of the conflicting
482 * lock that might make sense to it anyway
485 if (f.l_start > COMPAT_OFF_T_MAX)
487 if (f.l_len > COMPAT_OFF_T_MAX)
488 f.l_len = COMPAT_OFF_T_MAX;
490 ret = put_compat_flock(&f, compat_ptr(arg));
497 ret = get_compat_flock64(&f, compat_ptr(arg));
502 ret = sys_fcntl(fd, (cmd == F_GETLK64) ? F_GETLK :
503 ((cmd == F_SETLK64) ? F_SETLK : F_SETLKW),
506 if (cmd == F_GETLK64 && ret == 0) {
507 /* need to return lock information - see above for commentary */
508 if (f.l_start > COMPAT_LOFF_T_MAX)
510 if (f.l_len > COMPAT_LOFF_T_MAX)
511 f.l_len = COMPAT_LOFF_T_MAX;
513 ret = put_compat_flock64(&f, compat_ptr(arg));
518 ret = sys_fcntl(fd, cmd, arg);
524 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
527 if ((cmd == F_GETLK64) || (cmd == F_SETLK64) || (cmd == F_SETLKW64))
529 return compat_sys_fcntl64(fd, cmd, arg);
533 compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p)
538 mm_segment_t oldfs = get_fs();
539 if (unlikely(get_user(ctx64, ctx32p)))
543 /* The __user pointer cast is valid because of the set_fs() */
544 ret = sys_io_setup(nr_reqs, (aio_context_t __user *) &ctx64);
546 /* truncating is ok because it's a user address */
548 ret = put_user((u32) ctx64, ctx32p);
553 compat_sys_io_getevents(aio_context_t ctx_id,
554 unsigned long min_nr,
556 struct io_event __user *events,
557 struct compat_timespec __user *timeout)
561 struct timespec __user *ut = NULL;
564 if (unlikely(!access_ok(VERIFY_WRITE, events,
565 nr * sizeof(struct io_event))))
568 if (get_compat_timespec(&t, timeout))
571 ut = compat_alloc_user_space(sizeof(*ut));
572 if (copy_to_user(ut, &t, sizeof(t)) )
575 ret = sys_io_getevents(ctx_id, min_nr, nr, events, ut);
581 copy_iocb(long nr, u32 __user *ptr32, struct iocb __user * __user *ptr64)
586 for (i = 0; i < nr; ++i) {
587 if (get_user(uptr, ptr32 + i))
589 if (put_user(compat_ptr(uptr), ptr64 + i))
595 #define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *))
598 compat_sys_io_submit(aio_context_t ctx_id, int nr, u32 __user *iocb)
600 struct iocb __user * __user *iocb64;
603 if (unlikely(nr < 0))
606 if (nr > MAX_AIO_SUBMITS)
607 nr = MAX_AIO_SUBMITS;
609 iocb64 = compat_alloc_user_space(nr * sizeof(*iocb64));
610 ret = copy_iocb(nr, iocb, iocb64);
612 ret = sys_io_submit(ctx_id, nr, iocb64);
616 struct compat_ncp_mount_data {
617 compat_int_t version;
618 compat_uint_t ncp_fd;
619 __compat_uid_t mounted_uid;
620 compat_pid_t wdog_pid;
621 unsigned char mounted_vol[NCP_VOLNAME_LEN + 1];
622 compat_uint_t time_out;
623 compat_uint_t retry_count;
627 compat_mode_t file_mode;
628 compat_mode_t dir_mode;
631 struct compat_ncp_mount_data_v4 {
632 compat_int_t version;
633 compat_ulong_t flags;
634 compat_ulong_t mounted_uid;
635 compat_long_t wdog_pid;
636 compat_uint_t ncp_fd;
637 compat_uint_t time_out;
638 compat_uint_t retry_count;
641 compat_ulong_t file_mode;
642 compat_ulong_t dir_mode;
645 static void *do_ncp_super_data_conv(void *raw_data)
647 int version = *(unsigned int *)raw_data;
650 struct compat_ncp_mount_data *c_n = raw_data;
651 struct ncp_mount_data *n = raw_data;
653 n->dir_mode = c_n->dir_mode;
654 n->file_mode = c_n->file_mode;
657 memmove (n->mounted_vol, c_n->mounted_vol, (sizeof (c_n->mounted_vol) + 3 * sizeof (unsigned int)));
658 n->wdog_pid = c_n->wdog_pid;
659 n->mounted_uid = c_n->mounted_uid;
660 } else if (version == 4) {
661 struct compat_ncp_mount_data_v4 *c_n = raw_data;
662 struct ncp_mount_data_v4 *n = raw_data;
664 n->dir_mode = c_n->dir_mode;
665 n->file_mode = c_n->file_mode;
668 n->retry_count = c_n->retry_count;
669 n->time_out = c_n->time_out;
670 n->ncp_fd = c_n->ncp_fd;
671 n->wdog_pid = c_n->wdog_pid;
672 n->mounted_uid = c_n->mounted_uid;
673 n->flags = c_n->flags;
674 } else if (version != 5) {
681 struct compat_smb_mount_data {
682 compat_int_t version;
683 __compat_uid_t mounted_uid;
686 compat_mode_t file_mode;
687 compat_mode_t dir_mode;
690 static void *do_smb_super_data_conv(void *raw_data)
692 struct smb_mount_data *s = raw_data;
693 struct compat_smb_mount_data *c_s = raw_data;
695 if (c_s->version != SMB_MOUNT_OLDVERSION)
697 s->dir_mode = c_s->dir_mode;
698 s->file_mode = c_s->file_mode;
701 s->mounted_uid = c_s->mounted_uid;
706 struct compat_nfs_string {
711 static inline void compat_nfs_string(struct nfs_string *dst,
712 struct compat_nfs_string *src)
714 dst->data = compat_ptr(src->data);
718 struct compat_nfs4_mount_data_v1 {
719 compat_int_t version;
724 compat_int_t retrans;
725 compat_int_t acregmin;
726 compat_int_t acregmax;
727 compat_int_t acdirmin;
728 compat_int_t acdirmax;
729 struct compat_nfs_string client_addr;
730 struct compat_nfs_string mnt_path;
731 struct compat_nfs_string hostname;
732 compat_uint_t host_addrlen;
733 compat_uptr_t host_addr;
735 compat_int_t auth_flavourlen;
736 compat_uptr_t auth_flavours;
739 static int do_nfs4_super_data_conv(void *raw_data)
741 int version = *(compat_uint_t *) raw_data;
744 struct compat_nfs4_mount_data_v1 *raw = raw_data;
745 struct nfs4_mount_data *real = raw_data;
747 /* copy the fields backwards */
748 real->auth_flavours = compat_ptr(raw->auth_flavours);
749 real->auth_flavourlen = raw->auth_flavourlen;
750 real->proto = raw->proto;
751 real->host_addr = compat_ptr(raw->host_addr);
752 real->host_addrlen = raw->host_addrlen;
753 compat_nfs_string(&real->hostname, &raw->hostname);
754 compat_nfs_string(&real->mnt_path, &raw->mnt_path);
755 compat_nfs_string(&real->client_addr, &raw->client_addr);
756 real->acdirmax = raw->acdirmax;
757 real->acdirmin = raw->acdirmin;
758 real->acregmax = raw->acregmax;
759 real->acregmin = raw->acregmin;
760 real->retrans = raw->retrans;
761 real->timeo = raw->timeo;
762 real->wsize = raw->wsize;
763 real->rsize = raw->rsize;
764 real->flags = raw->flags;
765 real->version = raw->version;
771 #define SMBFS_NAME "smbfs"
772 #define NCPFS_NAME "ncpfs"
773 #define NFS4_NAME "nfs4"
775 asmlinkage long compat_sys_mount(char __user * dev_name, char __user * dir_name,
776 char __user * type, unsigned long flags,
779 unsigned long type_page;
780 unsigned long data_page;
781 unsigned long dev_page;
785 retval = copy_mount_options (type, &type_page);
789 dir_page = getname(dir_name);
790 retval = PTR_ERR(dir_page);
791 if (IS_ERR(dir_page))
794 retval = copy_mount_options (dev_name, &dev_page);
798 retval = copy_mount_options (data, &data_page);
804 if (type_page && data_page) {
805 if (!strcmp((char *)type_page, SMBFS_NAME)) {
806 do_smb_super_data_conv((void *)data_page);
807 } else if (!strcmp((char *)type_page, NCPFS_NAME)) {
808 do_ncp_super_data_conv((void *)data_page);
809 } else if (!strcmp((char *)type_page, NFS4_NAME)) {
810 if (do_nfs4_super_data_conv((void *) data_page))
816 retval = do_mount((char*)dev_page, dir_page, (char*)type_page,
817 flags, (void*)data_page);
821 free_page(data_page);
827 free_page(type_page);
832 #define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
834 struct compat_old_linux_dirent {
835 compat_ulong_t d_ino;
836 compat_ulong_t d_offset;
837 unsigned short d_namlen;
841 struct compat_readdir_callback {
842 struct compat_old_linux_dirent __user *dirent;
846 static int compat_fillonedir(void *__buf, const char *name, int namlen,
847 loff_t offset, u64 ino, unsigned int d_type)
849 struct compat_readdir_callback *buf = __buf;
850 struct compat_old_linux_dirent __user *dirent;
851 compat_ulong_t d_ino;
856 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) {
857 buf->result = -EOVERFLOW;
861 dirent = buf->dirent;
862 if (!access_ok(VERIFY_WRITE, dirent,
863 (unsigned long)(dirent->d_name + namlen + 1) -
864 (unsigned long)dirent))
866 if ( __put_user(d_ino, &dirent->d_ino) ||
867 __put_user(offset, &dirent->d_offset) ||
868 __put_user(namlen, &dirent->d_namlen) ||
869 __copy_to_user(dirent->d_name, name, namlen) ||
870 __put_user(0, dirent->d_name + namlen))
874 buf->result = -EFAULT;
878 asmlinkage long compat_sys_old_readdir(unsigned int fd,
879 struct compat_old_linux_dirent __user *dirent, unsigned int count)
883 struct compat_readdir_callback buf;
893 error = vfs_readdir(file, compat_fillonedir, &buf);
902 struct compat_linux_dirent {
903 compat_ulong_t d_ino;
904 compat_ulong_t d_off;
905 unsigned short d_reclen;
909 struct compat_getdents_callback {
910 struct compat_linux_dirent __user *current_dir;
911 struct compat_linux_dirent __user *previous;
916 static int compat_filldir(void *__buf, const char *name, int namlen,
917 loff_t offset, u64 ino, unsigned int d_type)
919 struct compat_linux_dirent __user * dirent;
920 struct compat_getdents_callback *buf = __buf;
921 compat_ulong_t d_ino;
922 int reclen = ALIGN(NAME_OFFSET(dirent) + namlen + 2, sizeof(compat_long_t));
924 buf->error = -EINVAL; /* only used if we fail.. */
925 if (reclen > buf->count)
928 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) {
929 buf->error = -EOVERFLOW;
932 dirent = buf->previous;
934 if (__put_user(offset, &dirent->d_off))
937 dirent = buf->current_dir;
938 if (__put_user(d_ino, &dirent->d_ino))
940 if (__put_user(reclen, &dirent->d_reclen))
942 if (copy_to_user(dirent->d_name, name, namlen))
944 if (__put_user(0, dirent->d_name + namlen))
946 if (__put_user(d_type, (char __user *) dirent + reclen - 1))
948 buf->previous = dirent;
949 dirent = (void __user *)dirent + reclen;
950 buf->current_dir = dirent;
951 buf->count -= reclen;
954 buf->error = -EFAULT;
958 asmlinkage long compat_sys_getdents(unsigned int fd,
959 struct compat_linux_dirent __user *dirent, unsigned int count)
962 struct compat_linux_dirent __user * lastdirent;
963 struct compat_getdents_callback buf;
967 if (!access_ok(VERIFY_WRITE, dirent, count))
975 buf.current_dir = dirent;
980 error = vfs_readdir(file, compat_filldir, &buf);
983 lastdirent = buf.previous;
985 if (put_user(file->f_pos, &lastdirent->d_off))
988 error = count - buf.count;
995 #ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64
997 struct compat_getdents_callback64 {
998 struct linux_dirent64 __user *current_dir;
999 struct linux_dirent64 __user *previous;
1004 static int compat_filldir64(void * __buf, const char * name, int namlen, loff_t offset,
1005 u64 ino, unsigned int d_type)
1007 struct linux_dirent64 __user *dirent;
1008 struct compat_getdents_callback64 *buf = __buf;
1009 int jj = NAME_OFFSET(dirent);
1010 int reclen = ALIGN(jj + namlen + 1, sizeof(u64));
1013 buf->error = -EINVAL; /* only used if we fail.. */
1014 if (reclen > buf->count)
1016 dirent = buf->previous;
1019 if (__put_user_unaligned(offset, &dirent->d_off))
1022 dirent = buf->current_dir;
1023 if (__put_user_unaligned(ino, &dirent->d_ino))
1026 if (__put_user_unaligned(off, &dirent->d_off))
1028 if (__put_user(reclen, &dirent->d_reclen))
1030 if (__put_user(d_type, &dirent->d_type))
1032 if (copy_to_user(dirent->d_name, name, namlen))
1034 if (__put_user(0, dirent->d_name + namlen))
1036 buf->previous = dirent;
1037 dirent = (void __user *)dirent + reclen;
1038 buf->current_dir = dirent;
1039 buf->count -= reclen;
1042 buf->error = -EFAULT;
1046 asmlinkage long compat_sys_getdents64(unsigned int fd,
1047 struct linux_dirent64 __user * dirent, unsigned int count)
1050 struct linux_dirent64 __user * lastdirent;
1051 struct compat_getdents_callback64 buf;
1055 if (!access_ok(VERIFY_WRITE, dirent, count))
1063 buf.current_dir = dirent;
1064 buf.previous = NULL;
1068 error = vfs_readdir(file, compat_filldir64, &buf);
1071 lastdirent = buf.previous;
1073 typeof(lastdirent->d_off) d_off = file->f_pos;
1074 if (__put_user_unaligned(d_off, &lastdirent->d_off))
1077 error = count - buf.count;
1083 #endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */
1085 static ssize_t compat_do_readv_writev(int type, struct file *file,
1086 const struct compat_iovec __user *uvector,
1087 unsigned long nr_segs, loff_t *pos)
1089 compat_ssize_t tot_len;
1090 struct iovec iovstack[UIO_FASTIOV];
1091 struct iovec *iov=iovstack, *vector;
1098 * SuS says "The readv() function *may* fail if the iovcnt argument
1099 * was less than or equal to 0, or greater than {IOV_MAX}. Linux has
1100 * traditionally returned zero for zero segments, so...
1107 * First get the "struct iovec" from user memory and
1108 * verify all the pointers
1111 if ((nr_segs > UIO_MAXIOV) || (nr_segs <= 0))
1115 if (nr_segs > UIO_FASTIOV) {
1117 iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL);
1122 if (!access_ok(VERIFY_READ, uvector, nr_segs*sizeof(*uvector)))
1126 * Single unix specification:
1127 * We should -EINVAL if an element length is not >= 0 and fitting an
1128 * ssize_t. The total length is fitting an ssize_t
1130 * Be careful here because iov_len is a size_t not an ssize_t
1135 for (seg = 0 ; seg < nr_segs; seg++) {
1136 compat_ssize_t tmp = tot_len;
1140 if (__get_user(len, &uvector->iov_len) ||
1141 __get_user(buf, &uvector->iov_base)) {
1145 if (len < 0) /* size_t not fitting an compat_ssize_t .. */
1148 if (tot_len < tmp) /* maths overflow on the compat_ssize_t */
1150 vector->iov_base = compat_ptr(buf);
1151 vector->iov_len = (compat_size_t) len;
1160 ret = rw_verify_area(type, file, pos, tot_len);
1166 fn = file->f_op->read;
1167 fnv = file->f_op->aio_read;
1169 fn = (io_fn_t)file->f_op->write;
1170 fnv = file->f_op->aio_write;
1174 ret = do_sync_readv_writev(file, iov, nr_segs, tot_len,
1177 ret = do_loop_readv_writev(file, iov, nr_segs, pos, fn);
1180 if (iov != iovstack)
1182 if ((ret + (type == READ)) > 0) {
1183 struct dentry *dentry = file->f_path.dentry;
1185 fsnotify_access(dentry);
1187 fsnotify_modify(dentry);
1192 static size_t compat_readv(struct file *file,
1193 const struct compat_iovec __user *vec,
1194 unsigned long vlen, loff_t *pos)
1196 ssize_t ret = -EBADF;
1198 if (!(file->f_mode & FMODE_READ))
1202 if (!file->f_op || (!file->f_op->aio_read && !file->f_op->read))
1205 ret = compat_do_readv_writev(READ, file, vec, vlen, pos);
1209 add_rchar(current, ret);
1215 compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec,
1222 file = fget_light(fd, &fput_needed);
1225 ret = compat_readv(file, vec, vlen, &file->f_pos);
1226 fput_light(file, fput_needed);
1231 compat_sys_preadv(unsigned long fd, const struct compat_iovec __user *vec,
1232 unsigned long vlen, u32 pos_low, u32 pos_high)
1234 loff_t pos = ((loff_t)pos_high << 32) | pos_low;
1241 file = fget_light(fd, &fput_needed);
1244 ret = compat_readv(file, vec, vlen, &pos);
1245 fput_light(file, fput_needed);
1249 static size_t compat_writev(struct file *file,
1250 const struct compat_iovec __user *vec,
1251 unsigned long vlen, loff_t *pos)
1253 ssize_t ret = -EBADF;
1255 if (!(file->f_mode & FMODE_WRITE))
1259 if (!file->f_op || (!file->f_op->aio_write && !file->f_op->write))
1262 ret = compat_do_readv_writev(WRITE, file, vec, vlen, pos);
1266 add_wchar(current, ret);
1272 compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec,
1279 file = fget_light(fd, &fput_needed);
1282 ret = compat_writev(file, vec, vlen, &file->f_pos);
1283 fput_light(file, fput_needed);
1288 compat_sys_pwritev(unsigned long fd, const struct compat_iovec __user *vec,
1289 unsigned long vlen, u32 pos_low, u32 pos_high)
1291 loff_t pos = ((loff_t)pos_high << 32) | pos_low;
1298 file = fget_light(fd, &fput_needed);
1301 ret = compat_writev(file, vec, vlen, &pos);
1302 fput_light(file, fput_needed);
1307 compat_sys_vmsplice(int fd, const struct compat_iovec __user *iov32,
1308 unsigned int nr_segs, unsigned int flags)
1311 struct iovec __user *iov;
1312 if (nr_segs > UIO_MAXIOV)
1314 iov = compat_alloc_user_space(nr_segs * sizeof(struct iovec));
1315 for (i = 0; i < nr_segs; i++) {
1316 struct compat_iovec v;
1317 if (get_user(v.iov_base, &iov32[i].iov_base) ||
1318 get_user(v.iov_len, &iov32[i].iov_len) ||
1319 put_user(compat_ptr(v.iov_base), &iov[i].iov_base) ||
1320 put_user(v.iov_len, &iov[i].iov_len))
1323 return sys_vmsplice(fd, iov, nr_segs, flags);
1327 * Exactly like fs/open.c:sys_open(), except that it doesn't set the
1331 compat_sys_open(const char __user *filename, int flags, int mode)
1333 return do_sys_open(AT_FDCWD, filename, flags, mode);
1337 * Exactly like fs/open.c:sys_openat(), except that it doesn't set the
1341 compat_sys_openat(unsigned int dfd, const char __user *filename, int flags, int mode)
1343 return do_sys_open(dfd, filename, flags, mode);
1347 * compat_count() counts the number of arguments/envelopes. It is basically
1348 * a copy of count() from fs/exec.c, except that it works with 32 bit argv
1349 * and envp pointers.
1351 static int compat_count(compat_uptr_t __user *argv, int max)
1359 if (get_user(p, argv))
1372 * compat_copy_strings() is basically a copy of copy_strings() from fs/exec.c
1373 * except that it works with 32 bit argv and envp pointers.
1375 static int compat_copy_strings(int argc, compat_uptr_t __user *argv,
1376 struct linux_binprm *bprm)
1378 struct page *kmapped_page = NULL;
1380 unsigned long kpos = 0;
1383 while (argc-- > 0) {
1388 if (get_user(str, argv+argc) ||
1389 !(len = strnlen_user(compat_ptr(str), MAX_ARG_STRLEN))) {
1394 if (len > MAX_ARG_STRLEN) {
1399 /* We're going to work our way backwords. */
1405 int offset, bytes_to_copy;
1407 offset = pos % PAGE_SIZE;
1411 bytes_to_copy = offset;
1412 if (bytes_to_copy > len)
1413 bytes_to_copy = len;
1415 offset -= bytes_to_copy;
1416 pos -= bytes_to_copy;
1417 str -= bytes_to_copy;
1418 len -= bytes_to_copy;
1420 if (!kmapped_page || kpos != (pos & PAGE_MASK)) {
1423 #ifdef CONFIG_STACK_GROWSUP
1424 ret = expand_stack_downwards(bprm->vma, pos);
1426 /* We've exceed the stack rlimit. */
1431 ret = get_user_pages(current, bprm->mm, pos,
1432 1, 1, 1, &page, NULL);
1434 /* We've exceed the stack rlimit. */
1440 flush_kernel_dcache_page(kmapped_page);
1441 kunmap(kmapped_page);
1442 put_page(kmapped_page);
1444 kmapped_page = page;
1445 kaddr = kmap(kmapped_page);
1446 kpos = pos & PAGE_MASK;
1447 flush_cache_page(bprm->vma, kpos,
1448 page_to_pfn(kmapped_page));
1450 if (copy_from_user(kaddr+offset, compat_ptr(str),
1460 flush_kernel_dcache_page(kmapped_page);
1461 kunmap(kmapped_page);
1462 put_page(kmapped_page);
1468 * compat_do_execve() is mostly a copy of do_execve(), with the exception
1469 * that it processes 32 bit argv and envp pointers.
1471 int compat_do_execve(char * filename,
1472 compat_uptr_t __user *argv,
1473 compat_uptr_t __user *envp,
1474 struct pt_regs * regs)
1476 struct linux_binprm *bprm;
1478 struct files_struct *displaced;
1482 retval = unshare_files(&displaced);
1487 bprm = kzalloc(sizeof(*bprm), GFP_KERNEL);
1491 retval = mutex_lock_interruptible(¤t->cred_guard_mutex);
1494 current->in_execve = 1;
1497 bprm->cred = prepare_exec_creds();
1501 retval = check_unsafe_exec(bprm);
1504 clear_in_exec = retval;
1506 file = open_exec(filename);
1507 retval = PTR_ERR(file);
1514 bprm->filename = filename;
1515 bprm->interp = filename;
1517 retval = bprm_mm_init(bprm);
1521 bprm->argc = compat_count(argv, MAX_ARG_STRINGS);
1522 if ((retval = bprm->argc) < 0)
1525 bprm->envc = compat_count(envp, MAX_ARG_STRINGS);
1526 if ((retval = bprm->envc) < 0)
1529 retval = prepare_binprm(bprm);
1533 retval = copy_strings_kernel(1, &bprm->filename, bprm);
1537 bprm->exec = bprm->p;
1538 retval = compat_copy_strings(bprm->envc, envp, bprm);
1542 retval = compat_copy_strings(bprm->argc, argv, bprm);
1546 retval = search_binary_handler(bprm, regs);
1550 /* execve succeeded */
1551 current->fs->in_exec = 0;
1552 current->in_execve = 0;
1553 mutex_unlock(¤t->cred_guard_mutex);
1554 acct_update_integrals(current);
1557 put_files_struct(displaced);
1566 allow_write_access(bprm->file);
1572 current->fs->in_exec = 0;
1575 current->in_execve = 0;
1576 mutex_unlock(¤t->cred_guard_mutex);
1583 reset_files_struct(displaced);
1588 #define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t))
1590 static int poll_select_copy_remaining(struct timespec *end_time, void __user *p,
1591 int timeval, int ret)
1598 if (current->personality & STICKY_TIMEOUTS)
1601 /* No update for zero timeout */
1602 if (!end_time->tv_sec && !end_time->tv_nsec)
1606 ts = timespec_sub(*end_time, ts);
1608 ts.tv_sec = ts.tv_nsec = 0;
1611 struct compat_timeval rtv;
1613 rtv.tv_sec = ts.tv_sec;
1614 rtv.tv_usec = ts.tv_nsec / NSEC_PER_USEC;
1616 if (!copy_to_user(p, &rtv, sizeof(rtv)))
1619 struct compat_timespec rts;
1621 rts.tv_sec = ts.tv_sec;
1622 rts.tv_nsec = ts.tv_nsec;
1624 if (!copy_to_user(p, &rts, sizeof(rts)))
1628 * If an application puts its timeval in read-only memory, we
1629 * don't want the Linux-specific update to the timeval to
1630 * cause a fault after the select has completed
1631 * successfully. However, because we're not updating the
1632 * timeval, we can't restart the system call.
1636 if (ret == -ERESTARTNOHAND)
1642 * Ooo, nasty. We need here to frob 32-bit unsigned longs to
1643 * 64-bit unsigned longs.
1646 int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
1647 unsigned long *fdset)
1649 nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS);
1653 if (!access_ok(VERIFY_WRITE, ufdset, nr*sizeof(compat_ulong_t)))
1660 if (__get_user(l, ufdset) || __get_user(h, ufdset+1))
1663 *fdset++ = h << 32 | l;
1666 if (odd && __get_user(*fdset, ufdset))
1669 /* Tricky, must clear full unsigned long in the
1670 * kernel fdset at the end, this makes sure that
1673 memset(fdset, 0, ((nr + 1) & ~1)*sizeof(compat_ulong_t));
1679 int compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
1680 unsigned long *fdset)
1683 nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS);
1694 if (__put_user(l, ufdset) || __put_user(h, ufdset+1))
1699 if (odd && __put_user(*fdset, ufdset))
1706 * This is a virtual copy of sys_select from fs/select.c and probably
1707 * should be compared to it from time to time
1711 * We can actually return ERESTARTSYS instead of EINTR, but I'd
1712 * like to be certain this leads to no problems. So I return
1713 * EINTR just for safety.
1715 * Update: ERESTARTSYS breaks at least the xview clock binary, so
1716 * I'm trying ERESTARTNOHAND which restart only when you want to.
1718 #define MAX_SELECT_SECONDS \
1719 ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1)
1721 int compat_core_sys_select(int n, compat_ulong_t __user *inp,
1722 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1723 struct timespec *end_time)
1727 int size, max_fds, ret = -EINVAL;
1728 struct fdtable *fdt;
1729 long stack_fds[SELECT_STACK_ALLOC/sizeof(long)];
1734 /* max_fds can increase, so grab it once to avoid race */
1736 fdt = files_fdtable(current->files);
1737 max_fds = fdt->max_fds;
1743 * We need 6 bitmaps (in/out/ex for both incoming and outgoing),
1744 * since we used fdset we need to allocate memory in units of
1747 size = FDS_BYTES(n);
1749 if (size > sizeof(stack_fds) / 6) {
1750 bits = kmalloc(6 * size, GFP_KERNEL);
1755 fds.in = (unsigned long *) bits;
1756 fds.out = (unsigned long *) (bits + size);
1757 fds.ex = (unsigned long *) (bits + 2*size);
1758 fds.res_in = (unsigned long *) (bits + 3*size);
1759 fds.res_out = (unsigned long *) (bits + 4*size);
1760 fds.res_ex = (unsigned long *) (bits + 5*size);
1762 if ((ret = compat_get_fd_set(n, inp, fds.in)) ||
1763 (ret = compat_get_fd_set(n, outp, fds.out)) ||
1764 (ret = compat_get_fd_set(n, exp, fds.ex)))
1766 zero_fd_set(n, fds.res_in);
1767 zero_fd_set(n, fds.res_out);
1768 zero_fd_set(n, fds.res_ex);
1770 ret = do_select(n, &fds, end_time);
1775 ret = -ERESTARTNOHAND;
1776 if (signal_pending(current))
1781 if (compat_set_fd_set(n, inp, fds.res_in) ||
1782 compat_set_fd_set(n, outp, fds.res_out) ||
1783 compat_set_fd_set(n, exp, fds.res_ex))
1786 if (bits != stack_fds)
1792 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
1793 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1794 struct compat_timeval __user *tvp)
1796 struct timespec end_time, *to = NULL;
1797 struct compat_timeval tv;
1801 if (copy_from_user(&tv, tvp, sizeof(tv)))
1805 if (poll_select_set_timeout(to,
1806 tv.tv_sec + (tv.tv_usec / USEC_PER_SEC),
1807 (tv.tv_usec % USEC_PER_SEC) * NSEC_PER_USEC))
1811 ret = compat_core_sys_select(n, inp, outp, exp, to);
1812 ret = poll_select_copy_remaining(&end_time, tvp, 1, ret);
1817 #ifdef HAVE_SET_RESTORE_SIGMASK
1818 static long do_compat_pselect(int n, compat_ulong_t __user *inp,
1819 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1820 struct compat_timespec __user *tsp, compat_sigset_t __user *sigmask,
1821 compat_size_t sigsetsize)
1823 compat_sigset_t ss32;
1824 sigset_t ksigmask, sigsaved;
1825 struct compat_timespec ts;
1826 struct timespec end_time, *to = NULL;
1830 if (copy_from_user(&ts, tsp, sizeof(ts)))
1834 if (poll_select_set_timeout(to, ts.tv_sec, ts.tv_nsec))
1839 if (sigsetsize != sizeof(compat_sigset_t))
1841 if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
1843 sigset_from_compat(&ksigmask, &ss32);
1845 sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP));
1846 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
1849 ret = compat_core_sys_select(n, inp, outp, exp, to);
1850 ret = poll_select_copy_remaining(&end_time, tsp, 0, ret);
1852 if (ret == -ERESTARTNOHAND) {
1854 * Don't restore the signal mask yet. Let do_signal() deliver
1855 * the signal on the way back to userspace, before the signal
1859 memcpy(¤t->saved_sigmask, &sigsaved,
1861 set_restore_sigmask();
1864 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
1869 asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp,
1870 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1871 struct compat_timespec __user *tsp, void __user *sig)
1873 compat_size_t sigsetsize = 0;
1874 compat_uptr_t up = 0;
1877 if (!access_ok(VERIFY_READ, sig,
1878 sizeof(compat_uptr_t)+sizeof(compat_size_t)) ||
1879 __get_user(up, (compat_uptr_t __user *)sig) ||
1880 __get_user(sigsetsize,
1881 (compat_size_t __user *)(sig+sizeof(up))))
1884 return do_compat_pselect(n, inp, outp, exp, tsp, compat_ptr(up),
1888 asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
1889 unsigned int nfds, struct compat_timespec __user *tsp,
1890 const compat_sigset_t __user *sigmask, compat_size_t sigsetsize)
1892 compat_sigset_t ss32;
1893 sigset_t ksigmask, sigsaved;
1894 struct compat_timespec ts;
1895 struct timespec end_time, *to = NULL;
1899 if (copy_from_user(&ts, tsp, sizeof(ts)))
1903 if (poll_select_set_timeout(to, ts.tv_sec, ts.tv_nsec))
1908 if (sigsetsize != sizeof(compat_sigset_t))
1910 if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
1912 sigset_from_compat(&ksigmask, &ss32);
1914 sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP));
1915 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
1918 ret = do_sys_poll(ufds, nfds, to);
1920 /* We can restart this syscall, usually */
1921 if (ret == -EINTR) {
1923 * Don't restore the signal mask yet. Let do_signal() deliver
1924 * the signal on the way back to userspace, before the signal
1928 memcpy(¤t->saved_sigmask, &sigsaved,
1930 set_restore_sigmask();
1932 ret = -ERESTARTNOHAND;
1934 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
1936 ret = poll_select_copy_remaining(&end_time, tsp, 0, ret);
1940 #endif /* HAVE_SET_RESTORE_SIGMASK */
1942 #if defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE)
1943 /* Stuff for NFS server syscalls... */
1944 struct compat_nfsctl_svc {
1949 struct compat_nfsctl_client {
1950 s8 cl32_ident[NFSCLNT_IDMAX+1];
1952 struct in_addr cl32_addrlist[NFSCLNT_ADDRMAX];
1955 u8 cl32_fhkey[NFSCLNT_KEYMAX];
1958 struct compat_nfsctl_export {
1959 char ex32_client[NFSCLNT_IDMAX+1];
1960 char ex32_path[NFS_MAXPATHLEN+1];
1961 compat_dev_t ex32_dev;
1962 compat_ino_t ex32_ino;
1963 compat_int_t ex32_flags;
1964 __compat_uid_t ex32_anon_uid;
1965 __compat_gid_t ex32_anon_gid;
1968 struct compat_nfsctl_fdparm {
1969 struct sockaddr gd32_addr;
1970 s8 gd32_path[NFS_MAXPATHLEN+1];
1971 compat_int_t gd32_version;
1974 struct compat_nfsctl_fsparm {
1975 struct sockaddr gd32_addr;
1976 s8 gd32_path[NFS_MAXPATHLEN+1];
1977 compat_int_t gd32_maxlen;
1980 struct compat_nfsctl_arg {
1981 compat_int_t ca32_version; /* safeguard */
1983 struct compat_nfsctl_svc u32_svc;
1984 struct compat_nfsctl_client u32_client;
1985 struct compat_nfsctl_export u32_export;
1986 struct compat_nfsctl_fdparm u32_getfd;
1987 struct compat_nfsctl_fsparm u32_getfs;
1989 #define ca32_svc u.u32_svc
1990 #define ca32_client u.u32_client
1991 #define ca32_export u.u32_export
1992 #define ca32_getfd u.u32_getfd
1993 #define ca32_getfs u.u32_getfs
1996 union compat_nfsctl_res {
1997 __u8 cr32_getfh[NFS_FHSIZE];
1998 struct knfsd_fh cr32_getfs;
2001 static int compat_nfs_svc_trans(struct nfsctl_arg *karg,
2002 struct compat_nfsctl_arg __user *arg)
2004 if (!access_ok(VERIFY_READ, &arg->ca32_svc, sizeof(arg->ca32_svc)) ||
2005 get_user(karg->ca_version, &arg->ca32_version) ||
2006 __get_user(karg->ca_svc.svc_port, &arg->ca32_svc.svc32_port) ||
2007 __get_user(karg->ca_svc.svc_nthreads,
2008 &arg->ca32_svc.svc32_nthreads))
2013 static int compat_nfs_clnt_trans(struct nfsctl_arg *karg,
2014 struct compat_nfsctl_arg __user *arg)
2016 if (!access_ok(VERIFY_READ, &arg->ca32_client,
2017 sizeof(arg->ca32_client)) ||
2018 get_user(karg->ca_version, &arg->ca32_version) ||
2019 __copy_from_user(&karg->ca_client.cl_ident[0],
2020 &arg->ca32_client.cl32_ident[0],
2022 __get_user(karg->ca_client.cl_naddr,
2023 &arg->ca32_client.cl32_naddr) ||
2024 __copy_from_user(&karg->ca_client.cl_addrlist[0],
2025 &arg->ca32_client.cl32_addrlist[0],
2026 (sizeof(struct in_addr) * NFSCLNT_ADDRMAX)) ||
2027 __get_user(karg->ca_client.cl_fhkeytype,
2028 &arg->ca32_client.cl32_fhkeytype) ||
2029 __get_user(karg->ca_client.cl_fhkeylen,
2030 &arg->ca32_client.cl32_fhkeylen) ||
2031 __copy_from_user(&karg->ca_client.cl_fhkey[0],
2032 &arg->ca32_client.cl32_fhkey[0],
2039 static int compat_nfs_exp_trans(struct nfsctl_arg *karg,
2040 struct compat_nfsctl_arg __user *arg)
2042 if (!access_ok(VERIFY_READ, &arg->ca32_export,
2043 sizeof(arg->ca32_export)) ||
2044 get_user(karg->ca_version, &arg->ca32_version) ||
2045 __copy_from_user(&karg->ca_export.ex_client[0],
2046 &arg->ca32_export.ex32_client[0],
2048 __copy_from_user(&karg->ca_export.ex_path[0],
2049 &arg->ca32_export.ex32_path[0],
2051 __get_user(karg->ca_export.ex_dev,
2052 &arg->ca32_export.ex32_dev) ||
2053 __get_user(karg->ca_export.ex_ino,
2054 &arg->ca32_export.ex32_ino) ||
2055 __get_user(karg->ca_export.ex_flags,
2056 &arg->ca32_export.ex32_flags) ||
2057 __get_user(karg->ca_export.ex_anon_uid,
2058 &arg->ca32_export.ex32_anon_uid) ||
2059 __get_user(karg->ca_export.ex_anon_gid,
2060 &arg->ca32_export.ex32_anon_gid))
2062 SET_UID(karg->ca_export.ex_anon_uid, karg->ca_export.ex_anon_uid);
2063 SET_GID(karg->ca_export.ex_anon_gid, karg->ca_export.ex_anon_gid);
2068 static int compat_nfs_getfd_trans(struct nfsctl_arg *karg,
2069 struct compat_nfsctl_arg __user *arg)
2071 if (!access_ok(VERIFY_READ, &arg->ca32_getfd,
2072 sizeof(arg->ca32_getfd)) ||
2073 get_user(karg->ca_version, &arg->ca32_version) ||
2074 __copy_from_user(&karg->ca_getfd.gd_addr,
2075 &arg->ca32_getfd.gd32_addr,
2076 (sizeof(struct sockaddr))) ||
2077 __copy_from_user(&karg->ca_getfd.gd_path,
2078 &arg->ca32_getfd.gd32_path,
2079 (NFS_MAXPATHLEN+1)) ||
2080 __get_user(karg->ca_getfd.gd_version,
2081 &arg->ca32_getfd.gd32_version))
2087 static int compat_nfs_getfs_trans(struct nfsctl_arg *karg,
2088 struct compat_nfsctl_arg __user *arg)
2090 if (!access_ok(VERIFY_READ,&arg->ca32_getfs,sizeof(arg->ca32_getfs)) ||
2091 get_user(karg->ca_version, &arg->ca32_version) ||
2092 __copy_from_user(&karg->ca_getfs.gd_addr,
2093 &arg->ca32_getfs.gd32_addr,
2094 (sizeof(struct sockaddr))) ||
2095 __copy_from_user(&karg->ca_getfs.gd_path,
2096 &arg->ca32_getfs.gd32_path,
2097 (NFS_MAXPATHLEN+1)) ||
2098 __get_user(karg->ca_getfs.gd_maxlen,
2099 &arg->ca32_getfs.gd32_maxlen))
2105 /* This really doesn't need translations, we are only passing
2106 * back a union which contains opaque nfs file handle data.
2108 static int compat_nfs_getfh_res_trans(union nfsctl_res *kres,
2109 union compat_nfsctl_res __user *res)
2113 err = copy_to_user(res, kres, sizeof(*res));
2115 return (err) ? -EFAULT : 0;
2118 asmlinkage long compat_sys_nfsservctl(int cmd,
2119 struct compat_nfsctl_arg __user *arg,
2120 union compat_nfsctl_res __user *res)
2122 struct nfsctl_arg *karg;
2123 union nfsctl_res *kres;
2127 karg = kmalloc(sizeof(*karg), GFP_USER);
2128 kres = kmalloc(sizeof(*kres), GFP_USER);
2129 if(!karg || !kres) {
2136 err = compat_nfs_svc_trans(karg, arg);
2139 case NFSCTL_ADDCLIENT:
2140 err = compat_nfs_clnt_trans(karg, arg);
2143 case NFSCTL_DELCLIENT:
2144 err = compat_nfs_clnt_trans(karg, arg);
2148 case NFSCTL_UNEXPORT:
2149 err = compat_nfs_exp_trans(karg, arg);
2153 err = compat_nfs_getfd_trans(karg, arg);
2157 err = compat_nfs_getfs_trans(karg, arg);
2170 /* The __user pointer casts are valid because of the set_fs() */
2171 err = sys_nfsservctl(cmd, (void __user *) karg, (void __user *) kres);
2177 if((cmd == NFSCTL_GETFD) ||
2178 (cmd == NFSCTL_GETFS))
2179 err = compat_nfs_getfh_res_trans(kres, res);
2187 long asmlinkage compat_sys_nfsservctl(int cmd, void *notused, void *notused2)
2189 return sys_ni_syscall();
2195 #ifdef HAVE_SET_RESTORE_SIGMASK
2196 asmlinkage long compat_sys_epoll_pwait(int epfd,
2197 struct compat_epoll_event __user *events,
2198 int maxevents, int timeout,
2199 const compat_sigset_t __user *sigmask,
2200 compat_size_t sigsetsize)
2203 compat_sigset_t csigmask;
2204 sigset_t ksigmask, sigsaved;
2207 * If the caller wants a certain signal mask to be set during the wait,
2211 if (sigsetsize != sizeof(compat_sigset_t))
2213 if (copy_from_user(&csigmask, sigmask, sizeof(csigmask)))
2215 sigset_from_compat(&ksigmask, &csigmask);
2216 sigdelsetmask(&ksigmask, sigmask(SIGKILL) | sigmask(SIGSTOP));
2217 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
2220 err = sys_epoll_wait(epfd, events, maxevents, timeout);
2223 * If we changed the signal mask, we need to restore the original one.
2224 * In case we've got a signal while waiting, we do not restore the
2225 * signal mask yet, and we allow do_signal() to deliver the signal on
2226 * the way back to userspace, before the signal mask is restored.
2229 if (err == -EINTR) {
2230 memcpy(¤t->saved_sigmask, &sigsaved,
2232 set_restore_sigmask();
2234 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
2239 #endif /* HAVE_SET_RESTORE_SIGMASK */
2241 #endif /* CONFIG_EPOLL */
2243 #ifdef CONFIG_SIGNALFD
2245 asmlinkage long compat_sys_signalfd4(int ufd,
2246 const compat_sigset_t __user *sigmask,
2247 compat_size_t sigsetsize, int flags)
2249 compat_sigset_t ss32;
2251 sigset_t __user *ksigmask;
2253 if (sigsetsize != sizeof(compat_sigset_t))
2255 if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
2257 sigset_from_compat(&tmp, &ss32);
2258 ksigmask = compat_alloc_user_space(sizeof(sigset_t));
2259 if (copy_to_user(ksigmask, &tmp, sizeof(sigset_t)))
2262 return sys_signalfd4(ufd, ksigmask, sizeof(sigset_t), flags);
2265 asmlinkage long compat_sys_signalfd(int ufd,
2266 const compat_sigset_t __user *sigmask,
2267 compat_size_t sigsetsize)
2269 return compat_sys_signalfd4(ufd, sigmask, sigsetsize, 0);
2271 #endif /* CONFIG_SIGNALFD */
2273 #ifdef CONFIG_TIMERFD
2275 asmlinkage long compat_sys_timerfd_settime(int ufd, int flags,
2276 const struct compat_itimerspec __user *utmr,
2277 struct compat_itimerspec __user *otmr)
2280 struct itimerspec t;
2281 struct itimerspec __user *ut;
2283 if (get_compat_itimerspec(&t, utmr))
2285 ut = compat_alloc_user_space(2 * sizeof(struct itimerspec));
2286 if (copy_to_user(&ut[0], &t, sizeof(t)))
2288 error = sys_timerfd_settime(ufd, flags, &ut[0], &ut[1]);
2290 error = (copy_from_user(&t, &ut[1], sizeof(struct itimerspec)) ||
2291 put_compat_itimerspec(otmr, &t)) ? -EFAULT: 0;
2296 asmlinkage long compat_sys_timerfd_gettime(int ufd,
2297 struct compat_itimerspec __user *otmr)
2300 struct itimerspec t;
2301 struct itimerspec __user *ut;
2303 ut = compat_alloc_user_space(sizeof(struct itimerspec));
2304 error = sys_timerfd_gettime(ufd, ut);
2306 error = (copy_from_user(&t, ut, sizeof(struct itimerspec)) ||
2307 put_compat_itimerspec(otmr, &t)) ? -EFAULT: 0;
2312 #endif /* CONFIG_TIMERFD */