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)
184 int error = vfs_stat_fd(AT_FDCWD, filename, &stat);
187 error = cp_compat_stat(&stat, statbuf);
191 asmlinkage long compat_sys_newlstat(char __user * filename,
192 struct compat_stat __user *statbuf)
195 int error = vfs_lstat_fd(AT_FDCWD, filename, &stat);
198 error = cp_compat_stat(&stat, statbuf);
202 #ifndef __ARCH_WANT_STAT64
203 asmlinkage long compat_sys_newfstatat(unsigned int dfd, char __user *filename,
204 struct compat_stat __user *statbuf, int flag)
209 error = vfs_fstatat(dfd, filename, &stat, flag);
212 return cp_compat_stat(&stat, statbuf);
216 asmlinkage long compat_sys_newfstat(unsigned int fd,
217 struct compat_stat __user * statbuf)
220 int error = vfs_fstat(fd, &stat);
223 error = cp_compat_stat(&stat, statbuf);
227 static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *kbuf)
230 if (sizeof ubuf->f_blocks == 4) {
231 if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail |
232 kbuf->f_bsize | kbuf->f_frsize) & 0xffffffff00000000ULL)
234 /* f_files and f_ffree may be -1; it's okay
235 * to stuff that into 32 bits */
236 if (kbuf->f_files != 0xffffffffffffffffULL
237 && (kbuf->f_files & 0xffffffff00000000ULL))
239 if (kbuf->f_ffree != 0xffffffffffffffffULL
240 && (kbuf->f_ffree & 0xffffffff00000000ULL))
243 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
244 __put_user(kbuf->f_type, &ubuf->f_type) ||
245 __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
246 __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
247 __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
248 __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
249 __put_user(kbuf->f_files, &ubuf->f_files) ||
250 __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
251 __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
252 __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
253 __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
254 __put_user(kbuf->f_frsize, &ubuf->f_frsize) ||
255 __put_user(0, &ubuf->f_spare[0]) ||
256 __put_user(0, &ubuf->f_spare[1]) ||
257 __put_user(0, &ubuf->f_spare[2]) ||
258 __put_user(0, &ubuf->f_spare[3]) ||
259 __put_user(0, &ubuf->f_spare[4]))
265 * The following statfs calls are copies of code from fs/open.c and
266 * should be checked against those from time to time
268 asmlinkage long compat_sys_statfs(const char __user *pathname, struct compat_statfs __user *buf)
273 error = user_path(pathname, &path);
276 error = vfs_statfs(path.dentry, &tmp);
278 error = put_compat_statfs(buf, &tmp);
284 asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user *buf)
294 error = vfs_statfs(file->f_path.dentry, &tmp);
296 error = put_compat_statfs(buf, &tmp);
302 static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf)
304 if (sizeof ubuf->f_blocks == 4) {
305 if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail |
306 kbuf->f_bsize | kbuf->f_frsize) & 0xffffffff00000000ULL)
308 /* f_files and f_ffree may be -1; it's okay
309 * to stuff that into 32 bits */
310 if (kbuf->f_files != 0xffffffffffffffffULL
311 && (kbuf->f_files & 0xffffffff00000000ULL))
313 if (kbuf->f_ffree != 0xffffffffffffffffULL
314 && (kbuf->f_ffree & 0xffffffff00000000ULL))
317 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
318 __put_user(kbuf->f_type, &ubuf->f_type) ||
319 __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
320 __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
321 __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
322 __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
323 __put_user(kbuf->f_files, &ubuf->f_files) ||
324 __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
325 __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
326 __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
327 __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
328 __put_user(kbuf->f_frsize, &ubuf->f_frsize))
333 asmlinkage long compat_sys_statfs64(const char __user *pathname, compat_size_t sz, struct compat_statfs64 __user *buf)
338 if (sz != sizeof(*buf))
341 error = user_path(pathname, &path);
344 error = vfs_statfs(path.dentry, &tmp);
346 error = put_compat_statfs64(buf, &tmp);
352 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, struct compat_statfs64 __user *buf)
358 if (sz != sizeof(*buf))
365 error = vfs_statfs(file->f_path.dentry, &tmp);
367 error = put_compat_statfs64(buf, &tmp);
374 * This is a copy of sys_ustat, just dealing with a structure layout.
375 * Given how simple this syscall is that apporach is more maintainable
376 * than the various conversion hacks.
378 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u)
380 struct super_block *sb;
381 struct compat_ustat tmp;
385 sb = user_get_super(new_decode_dev(dev));
388 err = vfs_statfs(sb->s_root, &sbuf);
393 memset(&tmp, 0, sizeof(struct compat_ustat));
394 tmp.f_tfree = sbuf.f_bfree;
395 tmp.f_tinode = sbuf.f_ffree;
396 if (copy_to_user(u, &tmp, sizeof(struct compat_ustat)))
401 static int get_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
403 if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
404 __get_user(kfl->l_type, &ufl->l_type) ||
405 __get_user(kfl->l_whence, &ufl->l_whence) ||
406 __get_user(kfl->l_start, &ufl->l_start) ||
407 __get_user(kfl->l_len, &ufl->l_len) ||
408 __get_user(kfl->l_pid, &ufl->l_pid))
413 static int put_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
415 if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
416 __put_user(kfl->l_type, &ufl->l_type) ||
417 __put_user(kfl->l_whence, &ufl->l_whence) ||
418 __put_user(kfl->l_start, &ufl->l_start) ||
419 __put_user(kfl->l_len, &ufl->l_len) ||
420 __put_user(kfl->l_pid, &ufl->l_pid))
425 #ifndef HAVE_ARCH_GET_COMPAT_FLOCK64
426 static int get_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
428 if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
429 __get_user(kfl->l_type, &ufl->l_type) ||
430 __get_user(kfl->l_whence, &ufl->l_whence) ||
431 __get_user(kfl->l_start, &ufl->l_start) ||
432 __get_user(kfl->l_len, &ufl->l_len) ||
433 __get_user(kfl->l_pid, &ufl->l_pid))
439 #ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64
440 static int put_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
442 if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
443 __put_user(kfl->l_type, &ufl->l_type) ||
444 __put_user(kfl->l_whence, &ufl->l_whence) ||
445 __put_user(kfl->l_start, &ufl->l_start) ||
446 __put_user(kfl->l_len, &ufl->l_len) ||
447 __put_user(kfl->l_pid, &ufl->l_pid))
453 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
464 ret = get_compat_flock(&f, compat_ptr(arg));
469 ret = sys_fcntl(fd, cmd, (unsigned long)&f);
471 if (cmd == F_GETLK && ret == 0) {
472 /* GETLK was successfule and we need to return the data...
473 * but it needs to fit in the compat structure.
474 * l_start shouldn't be too big, unless the original
475 * start + end is greater than COMPAT_OFF_T_MAX, in which
476 * case the app was asking for trouble, so we return
477 * -EOVERFLOW in that case.
478 * l_len could be too big, in which case we just truncate it,
479 * and only allow the app to see that part of the conflicting
480 * lock that might make sense to it anyway
483 if (f.l_start > COMPAT_OFF_T_MAX)
485 if (f.l_len > COMPAT_OFF_T_MAX)
486 f.l_len = COMPAT_OFF_T_MAX;
488 ret = put_compat_flock(&f, compat_ptr(arg));
495 ret = get_compat_flock64(&f, compat_ptr(arg));
500 ret = sys_fcntl(fd, (cmd == F_GETLK64) ? F_GETLK :
501 ((cmd == F_SETLK64) ? F_SETLK : F_SETLKW),
504 if (cmd == F_GETLK64 && ret == 0) {
505 /* need to return lock information - see above for commentary */
506 if (f.l_start > COMPAT_LOFF_T_MAX)
508 if (f.l_len > COMPAT_LOFF_T_MAX)
509 f.l_len = COMPAT_LOFF_T_MAX;
511 ret = put_compat_flock64(&f, compat_ptr(arg));
516 ret = sys_fcntl(fd, cmd, arg);
522 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
525 if ((cmd == F_GETLK64) || (cmd == F_SETLK64) || (cmd == F_SETLKW64))
527 return compat_sys_fcntl64(fd, cmd, arg);
531 compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p)
536 mm_segment_t oldfs = get_fs();
537 if (unlikely(get_user(ctx64, ctx32p)))
541 /* The __user pointer cast is valid because of the set_fs() */
542 ret = sys_io_setup(nr_reqs, (aio_context_t __user *) &ctx64);
544 /* truncating is ok because it's a user address */
546 ret = put_user((u32) ctx64, ctx32p);
551 compat_sys_io_getevents(aio_context_t ctx_id,
552 unsigned long min_nr,
554 struct io_event __user *events,
555 struct compat_timespec __user *timeout)
559 struct timespec __user *ut = NULL;
562 if (unlikely(!access_ok(VERIFY_WRITE, events,
563 nr * sizeof(struct io_event))))
566 if (get_compat_timespec(&t, timeout))
569 ut = compat_alloc_user_space(sizeof(*ut));
570 if (copy_to_user(ut, &t, sizeof(t)) )
573 ret = sys_io_getevents(ctx_id, min_nr, nr, events, ut);
579 copy_iocb(long nr, u32 __user *ptr32, struct iocb __user * __user *ptr64)
584 for (i = 0; i < nr; ++i) {
585 if (get_user(uptr, ptr32 + i))
587 if (put_user(compat_ptr(uptr), ptr64 + i))
593 #define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *))
596 compat_sys_io_submit(aio_context_t ctx_id, int nr, u32 __user *iocb)
598 struct iocb __user * __user *iocb64;
601 if (unlikely(nr < 0))
604 if (nr > MAX_AIO_SUBMITS)
605 nr = MAX_AIO_SUBMITS;
607 iocb64 = compat_alloc_user_space(nr * sizeof(*iocb64));
608 ret = copy_iocb(nr, iocb, iocb64);
610 ret = sys_io_submit(ctx_id, nr, iocb64);
614 struct compat_ncp_mount_data {
615 compat_int_t version;
616 compat_uint_t ncp_fd;
617 __compat_uid_t mounted_uid;
618 compat_pid_t wdog_pid;
619 unsigned char mounted_vol[NCP_VOLNAME_LEN + 1];
620 compat_uint_t time_out;
621 compat_uint_t retry_count;
625 compat_mode_t file_mode;
626 compat_mode_t dir_mode;
629 struct compat_ncp_mount_data_v4 {
630 compat_int_t version;
631 compat_ulong_t flags;
632 compat_ulong_t mounted_uid;
633 compat_long_t wdog_pid;
634 compat_uint_t ncp_fd;
635 compat_uint_t time_out;
636 compat_uint_t retry_count;
639 compat_ulong_t file_mode;
640 compat_ulong_t dir_mode;
643 static void *do_ncp_super_data_conv(void *raw_data)
645 int version = *(unsigned int *)raw_data;
648 struct compat_ncp_mount_data *c_n = raw_data;
649 struct ncp_mount_data *n = raw_data;
651 n->dir_mode = c_n->dir_mode;
652 n->file_mode = c_n->file_mode;
655 memmove (n->mounted_vol, c_n->mounted_vol, (sizeof (c_n->mounted_vol) + 3 * sizeof (unsigned int)));
656 n->wdog_pid = c_n->wdog_pid;
657 n->mounted_uid = c_n->mounted_uid;
658 } else if (version == 4) {
659 struct compat_ncp_mount_data_v4 *c_n = raw_data;
660 struct ncp_mount_data_v4 *n = raw_data;
662 n->dir_mode = c_n->dir_mode;
663 n->file_mode = c_n->file_mode;
666 n->retry_count = c_n->retry_count;
667 n->time_out = c_n->time_out;
668 n->ncp_fd = c_n->ncp_fd;
669 n->wdog_pid = c_n->wdog_pid;
670 n->mounted_uid = c_n->mounted_uid;
671 n->flags = c_n->flags;
672 } else if (version != 5) {
679 struct compat_smb_mount_data {
680 compat_int_t version;
681 __compat_uid_t mounted_uid;
684 compat_mode_t file_mode;
685 compat_mode_t dir_mode;
688 static void *do_smb_super_data_conv(void *raw_data)
690 struct smb_mount_data *s = raw_data;
691 struct compat_smb_mount_data *c_s = raw_data;
693 if (c_s->version != SMB_MOUNT_OLDVERSION)
695 s->dir_mode = c_s->dir_mode;
696 s->file_mode = c_s->file_mode;
699 s->mounted_uid = c_s->mounted_uid;
704 struct compat_nfs_string {
709 static inline void compat_nfs_string(struct nfs_string *dst,
710 struct compat_nfs_string *src)
712 dst->data = compat_ptr(src->data);
716 struct compat_nfs4_mount_data_v1 {
717 compat_int_t version;
722 compat_int_t retrans;
723 compat_int_t acregmin;
724 compat_int_t acregmax;
725 compat_int_t acdirmin;
726 compat_int_t acdirmax;
727 struct compat_nfs_string client_addr;
728 struct compat_nfs_string mnt_path;
729 struct compat_nfs_string hostname;
730 compat_uint_t host_addrlen;
731 compat_uptr_t host_addr;
733 compat_int_t auth_flavourlen;
734 compat_uptr_t auth_flavours;
737 static int do_nfs4_super_data_conv(void *raw_data)
739 int version = *(compat_uint_t *) raw_data;
742 struct compat_nfs4_mount_data_v1 *raw = raw_data;
743 struct nfs4_mount_data *real = raw_data;
745 /* copy the fields backwards */
746 real->auth_flavours = compat_ptr(raw->auth_flavours);
747 real->auth_flavourlen = raw->auth_flavourlen;
748 real->proto = raw->proto;
749 real->host_addr = compat_ptr(raw->host_addr);
750 real->host_addrlen = raw->host_addrlen;
751 compat_nfs_string(&real->hostname, &raw->hostname);
752 compat_nfs_string(&real->mnt_path, &raw->mnt_path);
753 compat_nfs_string(&real->client_addr, &raw->client_addr);
754 real->acdirmax = raw->acdirmax;
755 real->acdirmin = raw->acdirmin;
756 real->acregmax = raw->acregmax;
757 real->acregmin = raw->acregmin;
758 real->retrans = raw->retrans;
759 real->timeo = raw->timeo;
760 real->wsize = raw->wsize;
761 real->rsize = raw->rsize;
762 real->flags = raw->flags;
763 real->version = raw->version;
769 #define SMBFS_NAME "smbfs"
770 #define NCPFS_NAME "ncpfs"
771 #define NFS4_NAME "nfs4"
773 asmlinkage long compat_sys_mount(char __user * dev_name, char __user * dir_name,
774 char __user * type, unsigned long flags,
777 unsigned long type_page;
778 unsigned long data_page;
779 unsigned long dev_page;
783 retval = copy_mount_options (type, &type_page);
787 dir_page = getname(dir_name);
788 retval = PTR_ERR(dir_page);
789 if (IS_ERR(dir_page))
792 retval = copy_mount_options (dev_name, &dev_page);
796 retval = copy_mount_options (data, &data_page);
802 if (type_page && data_page) {
803 if (!strcmp((char *)type_page, SMBFS_NAME)) {
804 do_smb_super_data_conv((void *)data_page);
805 } else if (!strcmp((char *)type_page, NCPFS_NAME)) {
806 do_ncp_super_data_conv((void *)data_page);
807 } else if (!strcmp((char *)type_page, NFS4_NAME)) {
808 if (do_nfs4_super_data_conv((void *) data_page))
814 retval = do_mount((char*)dev_page, dir_page, (char*)type_page,
815 flags, (void*)data_page);
819 free_page(data_page);
825 free_page(type_page);
830 #define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
832 struct compat_old_linux_dirent {
833 compat_ulong_t d_ino;
834 compat_ulong_t d_offset;
835 unsigned short d_namlen;
839 struct compat_readdir_callback {
840 struct compat_old_linux_dirent __user *dirent;
844 static int compat_fillonedir(void *__buf, const char *name, int namlen,
845 loff_t offset, u64 ino, unsigned int d_type)
847 struct compat_readdir_callback *buf = __buf;
848 struct compat_old_linux_dirent __user *dirent;
849 compat_ulong_t d_ino;
854 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) {
855 buf->result = -EOVERFLOW;
859 dirent = buf->dirent;
860 if (!access_ok(VERIFY_WRITE, dirent,
861 (unsigned long)(dirent->d_name + namlen + 1) -
862 (unsigned long)dirent))
864 if ( __put_user(d_ino, &dirent->d_ino) ||
865 __put_user(offset, &dirent->d_offset) ||
866 __put_user(namlen, &dirent->d_namlen) ||
867 __copy_to_user(dirent->d_name, name, namlen) ||
868 __put_user(0, dirent->d_name + namlen))
872 buf->result = -EFAULT;
876 asmlinkage long compat_sys_old_readdir(unsigned int fd,
877 struct compat_old_linux_dirent __user *dirent, unsigned int count)
881 struct compat_readdir_callback buf;
891 error = vfs_readdir(file, compat_fillonedir, &buf);
900 struct compat_linux_dirent {
901 compat_ulong_t d_ino;
902 compat_ulong_t d_off;
903 unsigned short d_reclen;
907 struct compat_getdents_callback {
908 struct compat_linux_dirent __user *current_dir;
909 struct compat_linux_dirent __user *previous;
914 static int compat_filldir(void *__buf, const char *name, int namlen,
915 loff_t offset, u64 ino, unsigned int d_type)
917 struct compat_linux_dirent __user * dirent;
918 struct compat_getdents_callback *buf = __buf;
919 compat_ulong_t d_ino;
920 int reclen = ALIGN(NAME_OFFSET(dirent) + namlen + 2, sizeof(compat_long_t));
922 buf->error = -EINVAL; /* only used if we fail.. */
923 if (reclen > buf->count)
926 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) {
927 buf->error = -EOVERFLOW;
930 dirent = buf->previous;
932 if (__put_user(offset, &dirent->d_off))
935 dirent = buf->current_dir;
936 if (__put_user(d_ino, &dirent->d_ino))
938 if (__put_user(reclen, &dirent->d_reclen))
940 if (copy_to_user(dirent->d_name, name, namlen))
942 if (__put_user(0, dirent->d_name + namlen))
944 if (__put_user(d_type, (char __user *) dirent + reclen - 1))
946 buf->previous = dirent;
947 dirent = (void __user *)dirent + reclen;
948 buf->current_dir = dirent;
949 buf->count -= reclen;
952 buf->error = -EFAULT;
956 asmlinkage long compat_sys_getdents(unsigned int fd,
957 struct compat_linux_dirent __user *dirent, unsigned int count)
960 struct compat_linux_dirent __user * lastdirent;
961 struct compat_getdents_callback buf;
965 if (!access_ok(VERIFY_WRITE, dirent, count))
973 buf.current_dir = dirent;
978 error = vfs_readdir(file, compat_filldir, &buf);
981 lastdirent = buf.previous;
983 if (put_user(file->f_pos, &lastdirent->d_off))
986 error = count - buf.count;
993 #ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64
995 struct compat_getdents_callback64 {
996 struct linux_dirent64 __user *current_dir;
997 struct linux_dirent64 __user *previous;
1002 static int compat_filldir64(void * __buf, const char * name, int namlen, loff_t offset,
1003 u64 ino, unsigned int d_type)
1005 struct linux_dirent64 __user *dirent;
1006 struct compat_getdents_callback64 *buf = __buf;
1007 int jj = NAME_OFFSET(dirent);
1008 int reclen = ALIGN(jj + namlen + 1, sizeof(u64));
1011 buf->error = -EINVAL; /* only used if we fail.. */
1012 if (reclen > buf->count)
1014 dirent = buf->previous;
1017 if (__put_user_unaligned(offset, &dirent->d_off))
1020 dirent = buf->current_dir;
1021 if (__put_user_unaligned(ino, &dirent->d_ino))
1024 if (__put_user_unaligned(off, &dirent->d_off))
1026 if (__put_user(reclen, &dirent->d_reclen))
1028 if (__put_user(d_type, &dirent->d_type))
1030 if (copy_to_user(dirent->d_name, name, namlen))
1032 if (__put_user(0, dirent->d_name + namlen))
1034 buf->previous = dirent;
1035 dirent = (void __user *)dirent + reclen;
1036 buf->current_dir = dirent;
1037 buf->count -= reclen;
1040 buf->error = -EFAULT;
1044 asmlinkage long compat_sys_getdents64(unsigned int fd,
1045 struct linux_dirent64 __user * dirent, unsigned int count)
1048 struct linux_dirent64 __user * lastdirent;
1049 struct compat_getdents_callback64 buf;
1053 if (!access_ok(VERIFY_WRITE, dirent, count))
1061 buf.current_dir = dirent;
1062 buf.previous = NULL;
1066 error = vfs_readdir(file, compat_filldir64, &buf);
1069 lastdirent = buf.previous;
1071 typeof(lastdirent->d_off) d_off = file->f_pos;
1072 if (__put_user_unaligned(d_off, &lastdirent->d_off))
1075 error = count - buf.count;
1081 #endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */
1083 static ssize_t compat_do_readv_writev(int type, struct file *file,
1084 const struct compat_iovec __user *uvector,
1085 unsigned long nr_segs, loff_t *pos)
1087 compat_ssize_t tot_len;
1088 struct iovec iovstack[UIO_FASTIOV];
1089 struct iovec *iov=iovstack, *vector;
1096 * SuS says "The readv() function *may* fail if the iovcnt argument
1097 * was less than or equal to 0, or greater than {IOV_MAX}. Linux has
1098 * traditionally returned zero for zero segments, so...
1105 * First get the "struct iovec" from user memory and
1106 * verify all the pointers
1109 if ((nr_segs > UIO_MAXIOV) || (nr_segs <= 0))
1113 if (nr_segs > UIO_FASTIOV) {
1115 iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL);
1120 if (!access_ok(VERIFY_READ, uvector, nr_segs*sizeof(*uvector)))
1124 * Single unix specification:
1125 * We should -EINVAL if an element length is not >= 0 and fitting an
1126 * ssize_t. The total length is fitting an ssize_t
1128 * Be careful here because iov_len is a size_t not an ssize_t
1133 for (seg = 0 ; seg < nr_segs; seg++) {
1134 compat_ssize_t tmp = tot_len;
1138 if (__get_user(len, &uvector->iov_len) ||
1139 __get_user(buf, &uvector->iov_base)) {
1143 if (len < 0) /* size_t not fitting an compat_ssize_t .. */
1146 if (tot_len < tmp) /* maths overflow on the compat_ssize_t */
1148 vector->iov_base = compat_ptr(buf);
1149 vector->iov_len = (compat_size_t) len;
1158 ret = rw_verify_area(type, file, pos, tot_len);
1164 fn = file->f_op->read;
1165 fnv = file->f_op->aio_read;
1167 fn = (io_fn_t)file->f_op->write;
1168 fnv = file->f_op->aio_write;
1172 ret = do_sync_readv_writev(file, iov, nr_segs, tot_len,
1175 ret = do_loop_readv_writev(file, iov, nr_segs, pos, fn);
1178 if (iov != iovstack)
1180 if ((ret + (type == READ)) > 0) {
1181 struct dentry *dentry = file->f_path.dentry;
1183 fsnotify_access(dentry);
1185 fsnotify_modify(dentry);
1190 static size_t compat_readv(struct file *file,
1191 const struct compat_iovec __user *vec,
1192 unsigned long vlen, loff_t *pos)
1194 ssize_t ret = -EBADF;
1196 if (!(file->f_mode & FMODE_READ))
1200 if (!file->f_op || (!file->f_op->aio_read && !file->f_op->read))
1203 ret = compat_do_readv_writev(READ, file, vec, vlen, pos);
1207 add_rchar(current, ret);
1213 compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec,
1220 file = fget_light(fd, &fput_needed);
1223 ret = compat_readv(file, vec, vlen, &file->f_pos);
1224 fput_light(file, fput_needed);
1229 compat_sys_preadv(unsigned long fd, const struct compat_iovec __user *vec,
1230 unsigned long vlen, u32 pos_low, u32 pos_high)
1232 loff_t pos = ((loff_t)pos_high << 32) | pos_low;
1239 file = fget_light(fd, &fput_needed);
1242 ret = compat_readv(file, vec, vlen, &pos);
1243 fput_light(file, fput_needed);
1247 static size_t compat_writev(struct file *file,
1248 const struct compat_iovec __user *vec,
1249 unsigned long vlen, loff_t *pos)
1251 ssize_t ret = -EBADF;
1253 if (!(file->f_mode & FMODE_WRITE))
1257 if (!file->f_op || (!file->f_op->aio_write && !file->f_op->write))
1260 ret = compat_do_readv_writev(WRITE, file, vec, vlen, pos);
1264 add_wchar(current, ret);
1270 compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec,
1277 file = fget_light(fd, &fput_needed);
1280 ret = compat_writev(file, vec, vlen, &file->f_pos);
1281 fput_light(file, fput_needed);
1286 compat_sys_pwritev(unsigned long fd, const struct compat_iovec __user *vec,
1287 unsigned long vlen, u32 pos_low, u32 pos_high)
1289 loff_t pos = ((loff_t)pos_high << 32) | pos_low;
1296 file = fget_light(fd, &fput_needed);
1299 ret = compat_writev(file, vec, vlen, &pos);
1300 fput_light(file, fput_needed);
1305 compat_sys_vmsplice(int fd, const struct compat_iovec __user *iov32,
1306 unsigned int nr_segs, unsigned int flags)
1309 struct iovec __user *iov;
1310 if (nr_segs > UIO_MAXIOV)
1312 iov = compat_alloc_user_space(nr_segs * sizeof(struct iovec));
1313 for (i = 0; i < nr_segs; i++) {
1314 struct compat_iovec v;
1315 if (get_user(v.iov_base, &iov32[i].iov_base) ||
1316 get_user(v.iov_len, &iov32[i].iov_len) ||
1317 put_user(compat_ptr(v.iov_base), &iov[i].iov_base) ||
1318 put_user(v.iov_len, &iov[i].iov_len))
1321 return sys_vmsplice(fd, iov, nr_segs, flags);
1325 * Exactly like fs/open.c:sys_open(), except that it doesn't set the
1329 compat_sys_open(const char __user *filename, int flags, int mode)
1331 return do_sys_open(AT_FDCWD, filename, flags, mode);
1335 * Exactly like fs/open.c:sys_openat(), except that it doesn't set the
1339 compat_sys_openat(unsigned int dfd, const char __user *filename, int flags, int mode)
1341 return do_sys_open(dfd, filename, flags, mode);
1345 * compat_count() counts the number of arguments/envelopes. It is basically
1346 * a copy of count() from fs/exec.c, except that it works with 32 bit argv
1347 * and envp pointers.
1349 static int compat_count(compat_uptr_t __user *argv, int max)
1357 if (get_user(p, argv))
1370 * compat_copy_strings() is basically a copy of copy_strings() from fs/exec.c
1371 * except that it works with 32 bit argv and envp pointers.
1373 static int compat_copy_strings(int argc, compat_uptr_t __user *argv,
1374 struct linux_binprm *bprm)
1376 struct page *kmapped_page = NULL;
1378 unsigned long kpos = 0;
1381 while (argc-- > 0) {
1386 if (get_user(str, argv+argc) ||
1387 !(len = strnlen_user(compat_ptr(str), MAX_ARG_STRLEN))) {
1392 if (len > MAX_ARG_STRLEN) {
1397 /* We're going to work our way backwords. */
1403 int offset, bytes_to_copy;
1405 offset = pos % PAGE_SIZE;
1409 bytes_to_copy = offset;
1410 if (bytes_to_copy > len)
1411 bytes_to_copy = len;
1413 offset -= bytes_to_copy;
1414 pos -= bytes_to_copy;
1415 str -= bytes_to_copy;
1416 len -= bytes_to_copy;
1418 if (!kmapped_page || kpos != (pos & PAGE_MASK)) {
1421 #ifdef CONFIG_STACK_GROWSUP
1422 ret = expand_stack_downwards(bprm->vma, pos);
1424 /* We've exceed the stack rlimit. */
1429 ret = get_user_pages(current, bprm->mm, pos,
1430 1, 1, 1, &page, NULL);
1432 /* We've exceed the stack rlimit. */
1438 flush_kernel_dcache_page(kmapped_page);
1439 kunmap(kmapped_page);
1440 put_page(kmapped_page);
1442 kmapped_page = page;
1443 kaddr = kmap(kmapped_page);
1444 kpos = pos & PAGE_MASK;
1445 flush_cache_page(bprm->vma, kpos,
1446 page_to_pfn(kmapped_page));
1448 if (copy_from_user(kaddr+offset, compat_ptr(str),
1458 flush_kernel_dcache_page(kmapped_page);
1459 kunmap(kmapped_page);
1460 put_page(kmapped_page);
1466 * compat_do_execve() is mostly a copy of do_execve(), with the exception
1467 * that it processes 32 bit argv and envp pointers.
1469 int compat_do_execve(char * filename,
1470 compat_uptr_t __user *argv,
1471 compat_uptr_t __user *envp,
1472 struct pt_regs * regs)
1474 struct linux_binprm *bprm;
1476 struct files_struct *displaced;
1479 retval = unshare_files(&displaced);
1484 bprm = kzalloc(sizeof(*bprm), GFP_KERNEL);
1488 retval = mutex_lock_interruptible(¤t->cred_exec_mutex);
1491 current->in_execve = 1;
1494 bprm->cred = prepare_exec_creds();
1498 retval = check_unsafe_exec(bprm);
1502 file = open_exec(filename);
1503 retval = PTR_ERR(file);
1510 bprm->filename = filename;
1511 bprm->interp = filename;
1513 retval = bprm_mm_init(bprm);
1517 bprm->argc = compat_count(argv, MAX_ARG_STRINGS);
1518 if ((retval = bprm->argc) < 0)
1521 bprm->envc = compat_count(envp, MAX_ARG_STRINGS);
1522 if ((retval = bprm->envc) < 0)
1525 retval = prepare_binprm(bprm);
1529 retval = copy_strings_kernel(1, &bprm->filename, bprm);
1533 bprm->exec = bprm->p;
1534 retval = compat_copy_strings(bprm->envc, envp, bprm);
1538 retval = compat_copy_strings(bprm->argc, argv, bprm);
1542 retval = search_binary_handler(bprm, regs);
1546 /* execve succeeded */
1547 write_lock(¤t->fs->lock);
1548 current->fs->in_exec = 0;
1549 write_unlock(¤t->fs->lock);
1550 current->in_execve = 0;
1551 mutex_unlock(¤t->cred_exec_mutex);
1552 acct_update_integrals(current);
1555 put_files_struct(displaced);
1564 allow_write_access(bprm->file);
1569 write_lock(¤t->fs->lock);
1570 current->fs->in_exec = 0;
1571 write_unlock(¤t->fs->lock);
1574 current->in_execve = 0;
1575 mutex_unlock(¤t->cred_exec_mutex);
1582 reset_files_struct(displaced);
1587 #define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t))
1589 static int poll_select_copy_remaining(struct timespec *end_time, void __user *p,
1590 int timeval, int ret)
1597 if (current->personality & STICKY_TIMEOUTS)
1600 /* No update for zero timeout */
1601 if (!end_time->tv_sec && !end_time->tv_nsec)
1605 ts = timespec_sub(*end_time, ts);
1607 ts.tv_sec = ts.tv_nsec = 0;
1610 struct compat_timeval rtv;
1612 rtv.tv_sec = ts.tv_sec;
1613 rtv.tv_usec = ts.tv_nsec / NSEC_PER_USEC;
1615 if (!copy_to_user(p, &rtv, sizeof(rtv)))
1618 struct compat_timespec rts;
1620 rts.tv_sec = ts.tv_sec;
1621 rts.tv_nsec = ts.tv_nsec;
1623 if (!copy_to_user(p, &rts, sizeof(rts)))
1627 * If an application puts its timeval in read-only memory, we
1628 * don't want the Linux-specific update to the timeval to
1629 * cause a fault after the select has completed
1630 * successfully. However, because we're not updating the
1631 * timeval, we can't restart the system call.
1635 if (ret == -ERESTARTNOHAND)
1641 * Ooo, nasty. We need here to frob 32-bit unsigned longs to
1642 * 64-bit unsigned longs.
1645 int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
1646 unsigned long *fdset)
1648 nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS);
1652 if (!access_ok(VERIFY_WRITE, ufdset, nr*sizeof(compat_ulong_t)))
1659 if (__get_user(l, ufdset) || __get_user(h, ufdset+1))
1662 *fdset++ = h << 32 | l;
1665 if (odd && __get_user(*fdset, ufdset))
1668 /* Tricky, must clear full unsigned long in the
1669 * kernel fdset at the end, this makes sure that
1672 memset(fdset, 0, ((nr + 1) & ~1)*sizeof(compat_ulong_t));
1678 int compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
1679 unsigned long *fdset)
1682 nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS);
1693 if (__put_user(l, ufdset) || __put_user(h, ufdset+1))
1698 if (odd && __put_user(*fdset, ufdset))
1705 * This is a virtual copy of sys_select from fs/select.c and probably
1706 * should be compared to it from time to time
1710 * We can actually return ERESTARTSYS instead of EINTR, but I'd
1711 * like to be certain this leads to no problems. So I return
1712 * EINTR just for safety.
1714 * Update: ERESTARTSYS breaks at least the xview clock binary, so
1715 * I'm trying ERESTARTNOHAND which restart only when you want to.
1717 #define MAX_SELECT_SECONDS \
1718 ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1)
1720 int compat_core_sys_select(int n, compat_ulong_t __user *inp,
1721 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1722 struct timespec *end_time)
1726 int size, max_fds, ret = -EINVAL;
1727 struct fdtable *fdt;
1728 long stack_fds[SELECT_STACK_ALLOC/sizeof(long)];
1733 /* max_fds can increase, so grab it once to avoid race */
1735 fdt = files_fdtable(current->files);
1736 max_fds = fdt->max_fds;
1742 * We need 6 bitmaps (in/out/ex for both incoming and outgoing),
1743 * since we used fdset we need to allocate memory in units of
1746 size = FDS_BYTES(n);
1748 if (size > sizeof(stack_fds) / 6) {
1749 bits = kmalloc(6 * size, GFP_KERNEL);
1754 fds.in = (unsigned long *) bits;
1755 fds.out = (unsigned long *) (bits + size);
1756 fds.ex = (unsigned long *) (bits + 2*size);
1757 fds.res_in = (unsigned long *) (bits + 3*size);
1758 fds.res_out = (unsigned long *) (bits + 4*size);
1759 fds.res_ex = (unsigned long *) (bits + 5*size);
1761 if ((ret = compat_get_fd_set(n, inp, fds.in)) ||
1762 (ret = compat_get_fd_set(n, outp, fds.out)) ||
1763 (ret = compat_get_fd_set(n, exp, fds.ex)))
1765 zero_fd_set(n, fds.res_in);
1766 zero_fd_set(n, fds.res_out);
1767 zero_fd_set(n, fds.res_ex);
1769 ret = do_select(n, &fds, end_time);
1774 ret = -ERESTARTNOHAND;
1775 if (signal_pending(current))
1780 if (compat_set_fd_set(n, inp, fds.res_in) ||
1781 compat_set_fd_set(n, outp, fds.res_out) ||
1782 compat_set_fd_set(n, exp, fds.res_ex))
1785 if (bits != stack_fds)
1791 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
1792 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1793 struct compat_timeval __user *tvp)
1795 struct timespec end_time, *to = NULL;
1796 struct compat_timeval tv;
1800 if (copy_from_user(&tv, tvp, sizeof(tv)))
1804 if (poll_select_set_timeout(to,
1805 tv.tv_sec + (tv.tv_usec / USEC_PER_SEC),
1806 (tv.tv_usec % USEC_PER_SEC) * NSEC_PER_USEC))
1810 ret = compat_core_sys_select(n, inp, outp, exp, to);
1811 ret = poll_select_copy_remaining(&end_time, tvp, 1, ret);
1816 #ifdef HAVE_SET_RESTORE_SIGMASK
1817 static long do_compat_pselect(int n, compat_ulong_t __user *inp,
1818 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1819 struct compat_timespec __user *tsp, compat_sigset_t __user *sigmask,
1820 compat_size_t sigsetsize)
1822 compat_sigset_t ss32;
1823 sigset_t ksigmask, sigsaved;
1824 struct compat_timespec ts;
1825 struct timespec end_time, *to = NULL;
1829 if (copy_from_user(&ts, tsp, sizeof(ts)))
1833 if (poll_select_set_timeout(to, ts.tv_sec, ts.tv_nsec))
1838 if (sigsetsize != sizeof(compat_sigset_t))
1840 if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
1842 sigset_from_compat(&ksigmask, &ss32);
1844 sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP));
1845 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
1848 ret = compat_core_sys_select(n, inp, outp, exp, to);
1849 ret = poll_select_copy_remaining(&end_time, tsp, 0, ret);
1851 if (ret == -ERESTARTNOHAND) {
1853 * Don't restore the signal mask yet. Let do_signal() deliver
1854 * the signal on the way back to userspace, before the signal
1858 memcpy(¤t->saved_sigmask, &sigsaved,
1860 set_restore_sigmask();
1863 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
1868 asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp,
1869 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1870 struct compat_timespec __user *tsp, void __user *sig)
1872 compat_size_t sigsetsize = 0;
1873 compat_uptr_t up = 0;
1876 if (!access_ok(VERIFY_READ, sig,
1877 sizeof(compat_uptr_t)+sizeof(compat_size_t)) ||
1878 __get_user(up, (compat_uptr_t __user *)sig) ||
1879 __get_user(sigsetsize,
1880 (compat_size_t __user *)(sig+sizeof(up))))
1883 return do_compat_pselect(n, inp, outp, exp, tsp, compat_ptr(up),
1887 asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
1888 unsigned int nfds, struct compat_timespec __user *tsp,
1889 const compat_sigset_t __user *sigmask, compat_size_t sigsetsize)
1891 compat_sigset_t ss32;
1892 sigset_t ksigmask, sigsaved;
1893 struct compat_timespec ts;
1894 struct timespec end_time, *to = NULL;
1898 if (copy_from_user(&ts, tsp, sizeof(ts)))
1902 if (poll_select_set_timeout(to, ts.tv_sec, ts.tv_nsec))
1907 if (sigsetsize != sizeof(compat_sigset_t))
1909 if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
1911 sigset_from_compat(&ksigmask, &ss32);
1913 sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP));
1914 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
1917 ret = do_sys_poll(ufds, nfds, to);
1919 /* We can restart this syscall, usually */
1920 if (ret == -EINTR) {
1922 * Don't restore the signal mask yet. Let do_signal() deliver
1923 * the signal on the way back to userspace, before the signal
1927 memcpy(¤t->saved_sigmask, &sigsaved,
1929 set_restore_sigmask();
1931 ret = -ERESTARTNOHAND;
1933 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
1935 ret = poll_select_copy_remaining(&end_time, tsp, 0, ret);
1939 #endif /* HAVE_SET_RESTORE_SIGMASK */
1941 #if defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE)
1942 /* Stuff for NFS server syscalls... */
1943 struct compat_nfsctl_svc {
1948 struct compat_nfsctl_client {
1949 s8 cl32_ident[NFSCLNT_IDMAX+1];
1951 struct in_addr cl32_addrlist[NFSCLNT_ADDRMAX];
1954 u8 cl32_fhkey[NFSCLNT_KEYMAX];
1957 struct compat_nfsctl_export {
1958 char ex32_client[NFSCLNT_IDMAX+1];
1959 char ex32_path[NFS_MAXPATHLEN+1];
1960 compat_dev_t ex32_dev;
1961 compat_ino_t ex32_ino;
1962 compat_int_t ex32_flags;
1963 __compat_uid_t ex32_anon_uid;
1964 __compat_gid_t ex32_anon_gid;
1967 struct compat_nfsctl_fdparm {
1968 struct sockaddr gd32_addr;
1969 s8 gd32_path[NFS_MAXPATHLEN+1];
1970 compat_int_t gd32_version;
1973 struct compat_nfsctl_fsparm {
1974 struct sockaddr gd32_addr;
1975 s8 gd32_path[NFS_MAXPATHLEN+1];
1976 compat_int_t gd32_maxlen;
1979 struct compat_nfsctl_arg {
1980 compat_int_t ca32_version; /* safeguard */
1982 struct compat_nfsctl_svc u32_svc;
1983 struct compat_nfsctl_client u32_client;
1984 struct compat_nfsctl_export u32_export;
1985 struct compat_nfsctl_fdparm u32_getfd;
1986 struct compat_nfsctl_fsparm u32_getfs;
1988 #define ca32_svc u.u32_svc
1989 #define ca32_client u.u32_client
1990 #define ca32_export u.u32_export
1991 #define ca32_getfd u.u32_getfd
1992 #define ca32_getfs u.u32_getfs
1995 union compat_nfsctl_res {
1996 __u8 cr32_getfh[NFS_FHSIZE];
1997 struct knfsd_fh cr32_getfs;
2000 static int compat_nfs_svc_trans(struct nfsctl_arg *karg,
2001 struct compat_nfsctl_arg __user *arg)
2003 if (!access_ok(VERIFY_READ, &arg->ca32_svc, sizeof(arg->ca32_svc)) ||
2004 get_user(karg->ca_version, &arg->ca32_version) ||
2005 __get_user(karg->ca_svc.svc_port, &arg->ca32_svc.svc32_port) ||
2006 __get_user(karg->ca_svc.svc_nthreads,
2007 &arg->ca32_svc.svc32_nthreads))
2012 static int compat_nfs_clnt_trans(struct nfsctl_arg *karg,
2013 struct compat_nfsctl_arg __user *arg)
2015 if (!access_ok(VERIFY_READ, &arg->ca32_client,
2016 sizeof(arg->ca32_client)) ||
2017 get_user(karg->ca_version, &arg->ca32_version) ||
2018 __copy_from_user(&karg->ca_client.cl_ident[0],
2019 &arg->ca32_client.cl32_ident[0],
2021 __get_user(karg->ca_client.cl_naddr,
2022 &arg->ca32_client.cl32_naddr) ||
2023 __copy_from_user(&karg->ca_client.cl_addrlist[0],
2024 &arg->ca32_client.cl32_addrlist[0],
2025 (sizeof(struct in_addr) * NFSCLNT_ADDRMAX)) ||
2026 __get_user(karg->ca_client.cl_fhkeytype,
2027 &arg->ca32_client.cl32_fhkeytype) ||
2028 __get_user(karg->ca_client.cl_fhkeylen,
2029 &arg->ca32_client.cl32_fhkeylen) ||
2030 __copy_from_user(&karg->ca_client.cl_fhkey[0],
2031 &arg->ca32_client.cl32_fhkey[0],
2038 static int compat_nfs_exp_trans(struct nfsctl_arg *karg,
2039 struct compat_nfsctl_arg __user *arg)
2041 if (!access_ok(VERIFY_READ, &arg->ca32_export,
2042 sizeof(arg->ca32_export)) ||
2043 get_user(karg->ca_version, &arg->ca32_version) ||
2044 __copy_from_user(&karg->ca_export.ex_client[0],
2045 &arg->ca32_export.ex32_client[0],
2047 __copy_from_user(&karg->ca_export.ex_path[0],
2048 &arg->ca32_export.ex32_path[0],
2050 __get_user(karg->ca_export.ex_dev,
2051 &arg->ca32_export.ex32_dev) ||
2052 __get_user(karg->ca_export.ex_ino,
2053 &arg->ca32_export.ex32_ino) ||
2054 __get_user(karg->ca_export.ex_flags,
2055 &arg->ca32_export.ex32_flags) ||
2056 __get_user(karg->ca_export.ex_anon_uid,
2057 &arg->ca32_export.ex32_anon_uid) ||
2058 __get_user(karg->ca_export.ex_anon_gid,
2059 &arg->ca32_export.ex32_anon_gid))
2061 SET_UID(karg->ca_export.ex_anon_uid, karg->ca_export.ex_anon_uid);
2062 SET_GID(karg->ca_export.ex_anon_gid, karg->ca_export.ex_anon_gid);
2067 static int compat_nfs_getfd_trans(struct nfsctl_arg *karg,
2068 struct compat_nfsctl_arg __user *arg)
2070 if (!access_ok(VERIFY_READ, &arg->ca32_getfd,
2071 sizeof(arg->ca32_getfd)) ||
2072 get_user(karg->ca_version, &arg->ca32_version) ||
2073 __copy_from_user(&karg->ca_getfd.gd_addr,
2074 &arg->ca32_getfd.gd32_addr,
2075 (sizeof(struct sockaddr))) ||
2076 __copy_from_user(&karg->ca_getfd.gd_path,
2077 &arg->ca32_getfd.gd32_path,
2078 (NFS_MAXPATHLEN+1)) ||
2079 __get_user(karg->ca_getfd.gd_version,
2080 &arg->ca32_getfd.gd32_version))
2086 static int compat_nfs_getfs_trans(struct nfsctl_arg *karg,
2087 struct compat_nfsctl_arg __user *arg)
2089 if (!access_ok(VERIFY_READ,&arg->ca32_getfs,sizeof(arg->ca32_getfs)) ||
2090 get_user(karg->ca_version, &arg->ca32_version) ||
2091 __copy_from_user(&karg->ca_getfs.gd_addr,
2092 &arg->ca32_getfs.gd32_addr,
2093 (sizeof(struct sockaddr))) ||
2094 __copy_from_user(&karg->ca_getfs.gd_path,
2095 &arg->ca32_getfs.gd32_path,
2096 (NFS_MAXPATHLEN+1)) ||
2097 __get_user(karg->ca_getfs.gd_maxlen,
2098 &arg->ca32_getfs.gd32_maxlen))
2104 /* This really doesn't need translations, we are only passing
2105 * back a union which contains opaque nfs file handle data.
2107 static int compat_nfs_getfh_res_trans(union nfsctl_res *kres,
2108 union compat_nfsctl_res __user *res)
2112 err = copy_to_user(res, kres, sizeof(*res));
2114 return (err) ? -EFAULT : 0;
2117 asmlinkage long compat_sys_nfsservctl(int cmd,
2118 struct compat_nfsctl_arg __user *arg,
2119 union compat_nfsctl_res __user *res)
2121 struct nfsctl_arg *karg;
2122 union nfsctl_res *kres;
2126 karg = kmalloc(sizeof(*karg), GFP_USER);
2127 kres = kmalloc(sizeof(*kres), GFP_USER);
2128 if(!karg || !kres) {
2135 err = compat_nfs_svc_trans(karg, arg);
2138 case NFSCTL_ADDCLIENT:
2139 err = compat_nfs_clnt_trans(karg, arg);
2142 case NFSCTL_DELCLIENT:
2143 err = compat_nfs_clnt_trans(karg, arg);
2147 case NFSCTL_UNEXPORT:
2148 err = compat_nfs_exp_trans(karg, arg);
2152 err = compat_nfs_getfd_trans(karg, arg);
2156 err = compat_nfs_getfs_trans(karg, arg);
2169 /* The __user pointer casts are valid because of the set_fs() */
2170 err = sys_nfsservctl(cmd, (void __user *) karg, (void __user *) kres);
2176 if((cmd == NFSCTL_GETFD) ||
2177 (cmd == NFSCTL_GETFS))
2178 err = compat_nfs_getfh_res_trans(kres, res);
2186 long asmlinkage compat_sys_nfsservctl(int cmd, void *notused, void *notused2)
2188 return sys_ni_syscall();
2194 #ifdef HAVE_SET_RESTORE_SIGMASK
2195 asmlinkage long compat_sys_epoll_pwait(int epfd,
2196 struct compat_epoll_event __user *events,
2197 int maxevents, int timeout,
2198 const compat_sigset_t __user *sigmask,
2199 compat_size_t sigsetsize)
2202 compat_sigset_t csigmask;
2203 sigset_t ksigmask, sigsaved;
2206 * If the caller wants a certain signal mask to be set during the wait,
2210 if (sigsetsize != sizeof(compat_sigset_t))
2212 if (copy_from_user(&csigmask, sigmask, sizeof(csigmask)))
2214 sigset_from_compat(&ksigmask, &csigmask);
2215 sigdelsetmask(&ksigmask, sigmask(SIGKILL) | sigmask(SIGSTOP));
2216 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
2219 err = sys_epoll_wait(epfd, events, maxevents, timeout);
2222 * If we changed the signal mask, we need to restore the original one.
2223 * In case we've got a signal while waiting, we do not restore the
2224 * signal mask yet, and we allow do_signal() to deliver the signal on
2225 * the way back to userspace, before the signal mask is restored.
2228 if (err == -EINTR) {
2229 memcpy(¤t->saved_sigmask, &sigsaved,
2231 set_restore_sigmask();
2233 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
2238 #endif /* HAVE_SET_RESTORE_SIGMASK */
2240 #endif /* CONFIG_EPOLL */
2242 #ifdef CONFIG_SIGNALFD
2244 asmlinkage long compat_sys_signalfd4(int ufd,
2245 const compat_sigset_t __user *sigmask,
2246 compat_size_t sigsetsize, int flags)
2248 compat_sigset_t ss32;
2250 sigset_t __user *ksigmask;
2252 if (sigsetsize != sizeof(compat_sigset_t))
2254 if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
2256 sigset_from_compat(&tmp, &ss32);
2257 ksigmask = compat_alloc_user_space(sizeof(sigset_t));
2258 if (copy_to_user(ksigmask, &tmp, sizeof(sigset_t)))
2261 return sys_signalfd4(ufd, ksigmask, sizeof(sigset_t), flags);
2264 asmlinkage long compat_sys_signalfd(int ufd,
2265 const compat_sigset_t __user *sigmask,
2266 compat_size_t sigsetsize)
2268 return compat_sys_signalfd4(ufd, sigmask, sigsetsize, 0);
2270 #endif /* CONFIG_SIGNALFD */
2272 #ifdef CONFIG_TIMERFD
2274 asmlinkage long compat_sys_timerfd_settime(int ufd, int flags,
2275 const struct compat_itimerspec __user *utmr,
2276 struct compat_itimerspec __user *otmr)
2279 struct itimerspec t;
2280 struct itimerspec __user *ut;
2282 if (get_compat_itimerspec(&t, utmr))
2284 ut = compat_alloc_user_space(2 * sizeof(struct itimerspec));
2285 if (copy_to_user(&ut[0], &t, sizeof(t)))
2287 error = sys_timerfd_settime(ufd, flags, &ut[0], &ut[1]);
2289 error = (copy_from_user(&t, &ut[1], sizeof(struct itimerspec)) ||
2290 put_compat_itimerspec(otmr, &t)) ? -EFAULT: 0;
2295 asmlinkage long compat_sys_timerfd_gettime(int ufd,
2296 struct compat_itimerspec __user *otmr)
2299 struct itimerspec t;
2300 struct itimerspec __user *ut;
2302 ut = compat_alloc_user_space(sizeof(struct itimerspec));
2303 error = sys_timerfd_gettime(ufd, ut);
2305 error = (copy_from_user(&t, ut, sizeof(struct itimerspec)) ||
2306 put_compat_itimerspec(otmr, &t)) ? -EFAULT: 0;
2311 #endif /* CONFIG_TIMERFD */