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/syscalls.h>
36 #include <linux/ctype.h>
37 #include <linux/module.h>
38 #include <linux/dirent.h>
39 #include <linux/fsnotify.h>
40 #include <linux/highuid.h>
41 #include <linux/nfsd/syscall.h>
42 #include <linux/personality.h>
43 #include <linux/rwsem.h>
44 #include <linux/tsacct_kern.h>
45 #include <linux/security.h>
46 #include <linux/highmem.h>
47 #include <linux/signal.h>
48 #include <linux/poll.h>
50 #include <linux/eventpoll.h>
51 #include <linux/fs_struct.h>
52 #include <linux/slab.h>
54 #include <asm/uaccess.h>
55 #include <asm/mmu_context.h>
56 #include <asm/ioctls.h>
61 int compat_printk(const char *fmt, ...)
68 ret = vprintk(fmt, ap);
73 #include "read_write.h"
76 * Not all architectures have sys_utime, so implement this in terms
79 asmlinkage long compat_sys_utime(char __user *filename, struct compat_utimbuf __user *t)
81 struct timespec tv[2];
84 if (get_user(tv[0].tv_sec, &t->actime) ||
85 get_user(tv[1].tv_sec, &t->modtime))
90 return do_utimes(AT_FDCWD, filename, t ? tv : NULL, 0);
93 asmlinkage long compat_sys_utimensat(unsigned int dfd, char __user *filename, struct compat_timespec __user *t, int flags)
95 struct timespec tv[2];
98 if (get_compat_timespec(&tv[0], &t[0]) ||
99 get_compat_timespec(&tv[1], &t[1]))
102 if (tv[0].tv_nsec == UTIME_OMIT && tv[1].tv_nsec == UTIME_OMIT)
105 return do_utimes(dfd, filename, t ? tv : NULL, flags);
108 asmlinkage long compat_sys_futimesat(unsigned int dfd, char __user *filename, struct compat_timeval __user *t)
110 struct timespec tv[2];
113 if (get_user(tv[0].tv_sec, &t[0].tv_sec) ||
114 get_user(tv[0].tv_nsec, &t[0].tv_usec) ||
115 get_user(tv[1].tv_sec, &t[1].tv_sec) ||
116 get_user(tv[1].tv_nsec, &t[1].tv_usec))
118 if (tv[0].tv_nsec >= 1000000 || tv[0].tv_nsec < 0 ||
119 tv[1].tv_nsec >= 1000000 || tv[1].tv_nsec < 0)
121 tv[0].tv_nsec *= 1000;
122 tv[1].tv_nsec *= 1000;
124 return do_utimes(dfd, filename, t ? tv : NULL, 0);
127 asmlinkage long compat_sys_utimes(char __user *filename, struct compat_timeval __user *t)
129 return compat_sys_futimesat(AT_FDCWD, filename, t);
132 static int cp_compat_stat(struct kstat *stat, struct compat_stat __user *ubuf)
134 compat_ino_t ino = stat->ino;
135 typeof(ubuf->st_uid) uid = 0;
136 typeof(ubuf->st_gid) gid = 0;
139 SET_UID(uid, stat->uid);
140 SET_GID(gid, stat->gid);
142 if ((u64) stat->size > MAX_NON_LFS ||
143 !old_valid_dev(stat->dev) ||
144 !old_valid_dev(stat->rdev))
146 if (sizeof(ino) < sizeof(stat->ino) && ino != stat->ino)
149 if (clear_user(ubuf, sizeof(*ubuf)))
152 err = __put_user(old_encode_dev(stat->dev), &ubuf->st_dev);
153 err |= __put_user(ino, &ubuf->st_ino);
154 err |= __put_user(stat->mode, &ubuf->st_mode);
155 err |= __put_user(stat->nlink, &ubuf->st_nlink);
156 err |= __put_user(uid, &ubuf->st_uid);
157 err |= __put_user(gid, &ubuf->st_gid);
158 err |= __put_user(old_encode_dev(stat->rdev), &ubuf->st_rdev);
159 err |= __put_user(stat->size, &ubuf->st_size);
160 err |= __put_user(stat->atime.tv_sec, &ubuf->st_atime);
161 err |= __put_user(stat->atime.tv_nsec, &ubuf->st_atime_nsec);
162 err |= __put_user(stat->mtime.tv_sec, &ubuf->st_mtime);
163 err |= __put_user(stat->mtime.tv_nsec, &ubuf->st_mtime_nsec);
164 err |= __put_user(stat->ctime.tv_sec, &ubuf->st_ctime);
165 err |= __put_user(stat->ctime.tv_nsec, &ubuf->st_ctime_nsec);
166 err |= __put_user(stat->blksize, &ubuf->st_blksize);
167 err |= __put_user(stat->blocks, &ubuf->st_blocks);
171 asmlinkage long compat_sys_newstat(char __user * filename,
172 struct compat_stat __user *statbuf)
177 error = vfs_stat(filename, &stat);
180 return cp_compat_stat(&stat, statbuf);
183 asmlinkage long compat_sys_newlstat(char __user * filename,
184 struct compat_stat __user *statbuf)
189 error = vfs_lstat(filename, &stat);
192 return cp_compat_stat(&stat, statbuf);
195 #ifndef __ARCH_WANT_STAT64
196 asmlinkage long compat_sys_newfstatat(unsigned int dfd, char __user *filename,
197 struct compat_stat __user *statbuf, int flag)
202 error = vfs_fstatat(dfd, filename, &stat, flag);
205 return cp_compat_stat(&stat, statbuf);
209 asmlinkage long compat_sys_newfstat(unsigned int fd,
210 struct compat_stat __user * statbuf)
213 int error = vfs_fstat(fd, &stat);
216 error = cp_compat_stat(&stat, statbuf);
220 static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *kbuf)
223 if (sizeof ubuf->f_blocks == 4) {
224 if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail |
225 kbuf->f_bsize | kbuf->f_frsize) & 0xffffffff00000000ULL)
227 /* f_files and f_ffree may be -1; it's okay
228 * to stuff that into 32 bits */
229 if (kbuf->f_files != 0xffffffffffffffffULL
230 && (kbuf->f_files & 0xffffffff00000000ULL))
232 if (kbuf->f_ffree != 0xffffffffffffffffULL
233 && (kbuf->f_ffree & 0xffffffff00000000ULL))
236 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
237 __put_user(kbuf->f_type, &ubuf->f_type) ||
238 __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
239 __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
240 __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
241 __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
242 __put_user(kbuf->f_files, &ubuf->f_files) ||
243 __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
244 __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
245 __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
246 __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
247 __put_user(kbuf->f_frsize, &ubuf->f_frsize) ||
248 __put_user(0, &ubuf->f_spare[0]) ||
249 __put_user(0, &ubuf->f_spare[1]) ||
250 __put_user(0, &ubuf->f_spare[2]) ||
251 __put_user(0, &ubuf->f_spare[3]) ||
252 __put_user(0, &ubuf->f_spare[4]))
258 * The following statfs calls are copies of code from fs/open.c and
259 * should be checked against those from time to time
261 asmlinkage long compat_sys_statfs(const char __user *pathname, struct compat_statfs __user *buf)
266 error = user_path(pathname, &path);
269 error = vfs_statfs(path.dentry, &tmp);
271 error = put_compat_statfs(buf, &tmp);
277 asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user *buf)
287 error = vfs_statfs(file->f_path.dentry, &tmp);
289 error = put_compat_statfs(buf, &tmp);
295 static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf)
297 if (sizeof ubuf->f_blocks == 4) {
298 if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail |
299 kbuf->f_bsize | kbuf->f_frsize) & 0xffffffff00000000ULL)
301 /* f_files and f_ffree may be -1; it's okay
302 * to stuff that into 32 bits */
303 if (kbuf->f_files != 0xffffffffffffffffULL
304 && (kbuf->f_files & 0xffffffff00000000ULL))
306 if (kbuf->f_ffree != 0xffffffffffffffffULL
307 && (kbuf->f_ffree & 0xffffffff00000000ULL))
310 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
311 __put_user(kbuf->f_type, &ubuf->f_type) ||
312 __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
313 __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
314 __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
315 __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
316 __put_user(kbuf->f_files, &ubuf->f_files) ||
317 __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
318 __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
319 __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
320 __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
321 __put_user(kbuf->f_frsize, &ubuf->f_frsize))
326 asmlinkage long compat_sys_statfs64(const char __user *pathname, compat_size_t sz, struct compat_statfs64 __user *buf)
331 if (sz != sizeof(*buf))
334 error = user_path(pathname, &path);
337 error = vfs_statfs(path.dentry, &tmp);
339 error = put_compat_statfs64(buf, &tmp);
345 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, struct compat_statfs64 __user *buf)
351 if (sz != sizeof(*buf))
358 error = vfs_statfs(file->f_path.dentry, &tmp);
360 error = put_compat_statfs64(buf, &tmp);
367 * This is a copy of sys_ustat, just dealing with a structure layout.
368 * Given how simple this syscall is that apporach is more maintainable
369 * than the various conversion hacks.
371 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u)
373 struct super_block *sb;
374 struct compat_ustat tmp;
378 sb = user_get_super(new_decode_dev(dev));
381 err = vfs_statfs(sb->s_root, &sbuf);
386 memset(&tmp, 0, sizeof(struct compat_ustat));
387 tmp.f_tfree = sbuf.f_bfree;
388 tmp.f_tinode = sbuf.f_ffree;
389 if (copy_to_user(u, &tmp, sizeof(struct compat_ustat)))
394 static int get_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
396 if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
397 __get_user(kfl->l_type, &ufl->l_type) ||
398 __get_user(kfl->l_whence, &ufl->l_whence) ||
399 __get_user(kfl->l_start, &ufl->l_start) ||
400 __get_user(kfl->l_len, &ufl->l_len) ||
401 __get_user(kfl->l_pid, &ufl->l_pid))
406 static int put_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
408 if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
409 __put_user(kfl->l_type, &ufl->l_type) ||
410 __put_user(kfl->l_whence, &ufl->l_whence) ||
411 __put_user(kfl->l_start, &ufl->l_start) ||
412 __put_user(kfl->l_len, &ufl->l_len) ||
413 __put_user(kfl->l_pid, &ufl->l_pid))
418 #ifndef HAVE_ARCH_GET_COMPAT_FLOCK64
419 static int get_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
421 if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
422 __get_user(kfl->l_type, &ufl->l_type) ||
423 __get_user(kfl->l_whence, &ufl->l_whence) ||
424 __get_user(kfl->l_start, &ufl->l_start) ||
425 __get_user(kfl->l_len, &ufl->l_len) ||
426 __get_user(kfl->l_pid, &ufl->l_pid))
432 #ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64
433 static int put_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
435 if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
436 __put_user(kfl->l_type, &ufl->l_type) ||
437 __put_user(kfl->l_whence, &ufl->l_whence) ||
438 __put_user(kfl->l_start, &ufl->l_start) ||
439 __put_user(kfl->l_len, &ufl->l_len) ||
440 __put_user(kfl->l_pid, &ufl->l_pid))
446 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
457 ret = get_compat_flock(&f, compat_ptr(arg));
462 ret = sys_fcntl(fd, cmd, (unsigned long)&f);
464 if (cmd == F_GETLK && ret == 0) {
465 /* GETLK was successful and we need to return the data...
466 * but it needs to fit in the compat structure.
467 * l_start shouldn't be too big, unless the original
468 * start + end is greater than COMPAT_OFF_T_MAX, in which
469 * case the app was asking for trouble, so we return
470 * -EOVERFLOW in that case.
471 * l_len could be too big, in which case we just truncate it,
472 * and only allow the app to see that part of the conflicting
473 * lock that might make sense to it anyway
476 if (f.l_start > COMPAT_OFF_T_MAX)
478 if (f.l_len > COMPAT_OFF_T_MAX)
479 f.l_len = COMPAT_OFF_T_MAX;
481 ret = put_compat_flock(&f, compat_ptr(arg));
488 ret = get_compat_flock64(&f, compat_ptr(arg));
493 ret = sys_fcntl(fd, (cmd == F_GETLK64) ? F_GETLK :
494 ((cmd == F_SETLK64) ? F_SETLK : F_SETLKW),
497 if (cmd == F_GETLK64 && ret == 0) {
498 /* need to return lock information - see above for commentary */
499 if (f.l_start > COMPAT_LOFF_T_MAX)
501 if (f.l_len > COMPAT_LOFF_T_MAX)
502 f.l_len = COMPAT_LOFF_T_MAX;
504 ret = put_compat_flock64(&f, compat_ptr(arg));
509 ret = sys_fcntl(fd, cmd, arg);
515 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
518 if ((cmd == F_GETLK64) || (cmd == F_SETLK64) || (cmd == F_SETLKW64))
520 return compat_sys_fcntl64(fd, cmd, arg);
524 compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p)
529 mm_segment_t oldfs = get_fs();
530 if (unlikely(get_user(ctx64, ctx32p)))
534 /* The __user pointer cast is valid because of the set_fs() */
535 ret = sys_io_setup(nr_reqs, (aio_context_t __user *) &ctx64);
537 /* truncating is ok because it's a user address */
539 ret = put_user((u32) ctx64, ctx32p);
544 compat_sys_io_getevents(aio_context_t ctx_id,
545 unsigned long min_nr,
547 struct io_event __user *events,
548 struct compat_timespec __user *timeout)
552 struct timespec __user *ut = NULL;
555 if (unlikely(!access_ok(VERIFY_WRITE, events,
556 nr * sizeof(struct io_event))))
559 if (get_compat_timespec(&t, timeout))
562 ut = compat_alloc_user_space(sizeof(*ut));
563 if (copy_to_user(ut, &t, sizeof(t)) )
566 ret = sys_io_getevents(ctx_id, min_nr, nr, events, ut);
571 /* A write operation does a read from user space and vice versa */
572 #define vrfy_dir(type) ((type) == READ ? VERIFY_WRITE : VERIFY_READ)
574 ssize_t compat_rw_copy_check_uvector(int type,
575 const struct compat_iovec __user *uvector, unsigned long nr_segs,
576 unsigned long fast_segs, struct iovec *fast_pointer,
577 struct iovec **ret_pointer)
579 compat_ssize_t tot_len;
580 struct iovec *iov = *ret_pointer = fast_pointer;
585 * SuS says "The readv() function *may* fail if the iovcnt argument
586 * was less than or equal to 0, or greater than {IOV_MAX}. Linux has
587 * traditionally returned zero for zero segments, so...
593 if (nr_segs > UIO_MAXIOV || nr_segs < 0)
595 if (nr_segs > fast_segs) {
597 iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL);
599 *ret_pointer = fast_pointer;
606 * Single unix specification:
607 * We should -EINVAL if an element length is not >= 0 and fitting an
608 * ssize_t. The total length is fitting an ssize_t
610 * Be careful here because iov_len is a size_t not an ssize_t
614 for (seg = 0; seg < nr_segs; seg++) {
615 compat_ssize_t tmp = tot_len;
619 if (__get_user(len, &uvector->iov_len) ||
620 __get_user(buf, &uvector->iov_base)) {
624 if (len < 0) /* size_t not fitting in compat_ssize_t .. */
627 if (tot_len < tmp) /* maths overflow on the compat_ssize_t */
629 if (!access_ok(vrfy_dir(type), compat_ptr(buf), len)) {
633 iov->iov_base = compat_ptr(buf);
634 iov->iov_len = (compat_size_t) len;
645 copy_iocb(long nr, u32 __user *ptr32, struct iocb __user * __user *ptr64)
650 for (i = 0; i < nr; ++i) {
651 if (get_user(uptr, ptr32 + i))
653 if (put_user(compat_ptr(uptr), ptr64 + i))
659 #define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *))
662 compat_sys_io_submit(aio_context_t ctx_id, int nr, u32 __user *iocb)
664 struct iocb __user * __user *iocb64;
667 if (unlikely(nr < 0))
670 if (nr > MAX_AIO_SUBMITS)
671 nr = MAX_AIO_SUBMITS;
673 iocb64 = compat_alloc_user_space(nr * sizeof(*iocb64));
674 ret = copy_iocb(nr, iocb, iocb64);
676 ret = do_io_submit(ctx_id, nr, iocb64, 1);
680 struct compat_ncp_mount_data {
681 compat_int_t version;
682 compat_uint_t ncp_fd;
683 __compat_uid_t mounted_uid;
684 compat_pid_t wdog_pid;
685 unsigned char mounted_vol[NCP_VOLNAME_LEN + 1];
686 compat_uint_t time_out;
687 compat_uint_t retry_count;
691 compat_mode_t file_mode;
692 compat_mode_t dir_mode;
695 struct compat_ncp_mount_data_v4 {
696 compat_int_t version;
697 compat_ulong_t flags;
698 compat_ulong_t mounted_uid;
699 compat_long_t wdog_pid;
700 compat_uint_t ncp_fd;
701 compat_uint_t time_out;
702 compat_uint_t retry_count;
705 compat_ulong_t file_mode;
706 compat_ulong_t dir_mode;
709 static void *do_ncp_super_data_conv(void *raw_data)
711 int version = *(unsigned int *)raw_data;
714 struct compat_ncp_mount_data *c_n = raw_data;
715 struct ncp_mount_data *n = raw_data;
717 n->dir_mode = c_n->dir_mode;
718 n->file_mode = c_n->file_mode;
721 memmove (n->mounted_vol, c_n->mounted_vol, (sizeof (c_n->mounted_vol) + 3 * sizeof (unsigned int)));
722 n->wdog_pid = c_n->wdog_pid;
723 n->mounted_uid = c_n->mounted_uid;
724 } else if (version == 4) {
725 struct compat_ncp_mount_data_v4 *c_n = raw_data;
726 struct ncp_mount_data_v4 *n = raw_data;
728 n->dir_mode = c_n->dir_mode;
729 n->file_mode = c_n->file_mode;
732 n->retry_count = c_n->retry_count;
733 n->time_out = c_n->time_out;
734 n->ncp_fd = c_n->ncp_fd;
735 n->wdog_pid = c_n->wdog_pid;
736 n->mounted_uid = c_n->mounted_uid;
737 n->flags = c_n->flags;
738 } else if (version != 5) {
745 struct compat_smb_mount_data {
746 compat_int_t version;
747 __compat_uid_t mounted_uid;
750 compat_mode_t file_mode;
751 compat_mode_t dir_mode;
754 static void *do_smb_super_data_conv(void *raw_data)
756 struct smb_mount_data *s = raw_data;
757 struct compat_smb_mount_data *c_s = raw_data;
759 if (c_s->version != SMB_MOUNT_OLDVERSION)
761 s->dir_mode = c_s->dir_mode;
762 s->file_mode = c_s->file_mode;
765 s->mounted_uid = c_s->mounted_uid;
770 struct compat_nfs_string {
775 static inline void compat_nfs_string(struct nfs_string *dst,
776 struct compat_nfs_string *src)
778 dst->data = compat_ptr(src->data);
782 struct compat_nfs4_mount_data_v1 {
783 compat_int_t version;
788 compat_int_t retrans;
789 compat_int_t acregmin;
790 compat_int_t acregmax;
791 compat_int_t acdirmin;
792 compat_int_t acdirmax;
793 struct compat_nfs_string client_addr;
794 struct compat_nfs_string mnt_path;
795 struct compat_nfs_string hostname;
796 compat_uint_t host_addrlen;
797 compat_uptr_t host_addr;
799 compat_int_t auth_flavourlen;
800 compat_uptr_t auth_flavours;
803 static int do_nfs4_super_data_conv(void *raw_data)
805 int version = *(compat_uint_t *) raw_data;
808 struct compat_nfs4_mount_data_v1 *raw = raw_data;
809 struct nfs4_mount_data *real = raw_data;
811 /* copy the fields backwards */
812 real->auth_flavours = compat_ptr(raw->auth_flavours);
813 real->auth_flavourlen = raw->auth_flavourlen;
814 real->proto = raw->proto;
815 real->host_addr = compat_ptr(raw->host_addr);
816 real->host_addrlen = raw->host_addrlen;
817 compat_nfs_string(&real->hostname, &raw->hostname);
818 compat_nfs_string(&real->mnt_path, &raw->mnt_path);
819 compat_nfs_string(&real->client_addr, &raw->client_addr);
820 real->acdirmax = raw->acdirmax;
821 real->acdirmin = raw->acdirmin;
822 real->acregmax = raw->acregmax;
823 real->acregmin = raw->acregmin;
824 real->retrans = raw->retrans;
825 real->timeo = raw->timeo;
826 real->wsize = raw->wsize;
827 real->rsize = raw->rsize;
828 real->flags = raw->flags;
829 real->version = raw->version;
835 #define SMBFS_NAME "smbfs"
836 #define NCPFS_NAME "ncpfs"
837 #define NFS4_NAME "nfs4"
839 asmlinkage long compat_sys_mount(char __user * dev_name, char __user * dir_name,
840 char __user * type, unsigned long flags,
844 unsigned long data_page;
849 retval = copy_mount_string(type, &kernel_type);
853 dir_page = getname(dir_name);
854 retval = PTR_ERR(dir_page);
855 if (IS_ERR(dir_page))
858 retval = copy_mount_string(dev_name, &kernel_dev);
862 retval = copy_mount_options(data, &data_page);
868 if (kernel_type && data_page) {
869 if (!strcmp(kernel_type, SMBFS_NAME)) {
870 do_smb_super_data_conv((void *)data_page);
871 } else if (!strcmp(kernel_type, NCPFS_NAME)) {
872 do_ncp_super_data_conv((void *)data_page);
873 } else if (!strcmp(kernel_type, NFS4_NAME)) {
874 if (do_nfs4_super_data_conv((void *) data_page))
879 retval = do_mount(kernel_dev, dir_page, kernel_type,
880 flags, (void*)data_page);
883 free_page(data_page);
894 #define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
896 struct compat_old_linux_dirent {
897 compat_ulong_t d_ino;
898 compat_ulong_t d_offset;
899 unsigned short d_namlen;
903 struct compat_readdir_callback {
904 struct compat_old_linux_dirent __user *dirent;
908 static int compat_fillonedir(void *__buf, const char *name, int namlen,
909 loff_t offset, u64 ino, unsigned int d_type)
911 struct compat_readdir_callback *buf = __buf;
912 struct compat_old_linux_dirent __user *dirent;
913 compat_ulong_t d_ino;
918 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) {
919 buf->result = -EOVERFLOW;
923 dirent = buf->dirent;
924 if (!access_ok(VERIFY_WRITE, dirent,
925 (unsigned long)(dirent->d_name + namlen + 1) -
926 (unsigned long)dirent))
928 if ( __put_user(d_ino, &dirent->d_ino) ||
929 __put_user(offset, &dirent->d_offset) ||
930 __put_user(namlen, &dirent->d_namlen) ||
931 __copy_to_user(dirent->d_name, name, namlen) ||
932 __put_user(0, dirent->d_name + namlen))
936 buf->result = -EFAULT;
940 asmlinkage long compat_sys_old_readdir(unsigned int fd,
941 struct compat_old_linux_dirent __user *dirent, unsigned int count)
945 struct compat_readdir_callback buf;
955 error = vfs_readdir(file, compat_fillonedir, &buf);
964 struct compat_linux_dirent {
965 compat_ulong_t d_ino;
966 compat_ulong_t d_off;
967 unsigned short d_reclen;
971 struct compat_getdents_callback {
972 struct compat_linux_dirent __user *current_dir;
973 struct compat_linux_dirent __user *previous;
978 static int compat_filldir(void *__buf, const char *name, int namlen,
979 loff_t offset, u64 ino, unsigned int d_type)
981 struct compat_linux_dirent __user * dirent;
982 struct compat_getdents_callback *buf = __buf;
983 compat_ulong_t d_ino;
984 int reclen = ALIGN(NAME_OFFSET(dirent) + namlen + 2, sizeof(compat_long_t));
986 buf->error = -EINVAL; /* only used if we fail.. */
987 if (reclen > buf->count)
990 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) {
991 buf->error = -EOVERFLOW;
994 dirent = buf->previous;
996 if (__put_user(offset, &dirent->d_off))
999 dirent = buf->current_dir;
1000 if (__put_user(d_ino, &dirent->d_ino))
1002 if (__put_user(reclen, &dirent->d_reclen))
1004 if (copy_to_user(dirent->d_name, name, namlen))
1006 if (__put_user(0, dirent->d_name + namlen))
1008 if (__put_user(d_type, (char __user *) dirent + reclen - 1))
1010 buf->previous = dirent;
1011 dirent = (void __user *)dirent + reclen;
1012 buf->current_dir = dirent;
1013 buf->count -= reclen;
1016 buf->error = -EFAULT;
1020 asmlinkage long compat_sys_getdents(unsigned int fd,
1021 struct compat_linux_dirent __user *dirent, unsigned int count)
1024 struct compat_linux_dirent __user * lastdirent;
1025 struct compat_getdents_callback buf;
1029 if (!access_ok(VERIFY_WRITE, dirent, count))
1037 buf.current_dir = dirent;
1038 buf.previous = NULL;
1042 error = vfs_readdir(file, compat_filldir, &buf);
1045 lastdirent = buf.previous;
1047 if (put_user(file->f_pos, &lastdirent->d_off))
1050 error = count - buf.count;
1057 #ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64
1059 struct compat_getdents_callback64 {
1060 struct linux_dirent64 __user *current_dir;
1061 struct linux_dirent64 __user *previous;
1066 static int compat_filldir64(void * __buf, const char * name, int namlen, loff_t offset,
1067 u64 ino, unsigned int d_type)
1069 struct linux_dirent64 __user *dirent;
1070 struct compat_getdents_callback64 *buf = __buf;
1071 int jj = NAME_OFFSET(dirent);
1072 int reclen = ALIGN(jj + namlen + 1, sizeof(u64));
1075 buf->error = -EINVAL; /* only used if we fail.. */
1076 if (reclen > buf->count)
1078 dirent = buf->previous;
1081 if (__put_user_unaligned(offset, &dirent->d_off))
1084 dirent = buf->current_dir;
1085 if (__put_user_unaligned(ino, &dirent->d_ino))
1088 if (__put_user_unaligned(off, &dirent->d_off))
1090 if (__put_user(reclen, &dirent->d_reclen))
1092 if (__put_user(d_type, &dirent->d_type))
1094 if (copy_to_user(dirent->d_name, name, namlen))
1096 if (__put_user(0, dirent->d_name + namlen))
1098 buf->previous = dirent;
1099 dirent = (void __user *)dirent + reclen;
1100 buf->current_dir = dirent;
1101 buf->count -= reclen;
1104 buf->error = -EFAULT;
1108 asmlinkage long compat_sys_getdents64(unsigned int fd,
1109 struct linux_dirent64 __user * dirent, unsigned int count)
1112 struct linux_dirent64 __user * lastdirent;
1113 struct compat_getdents_callback64 buf;
1117 if (!access_ok(VERIFY_WRITE, dirent, count))
1125 buf.current_dir = dirent;
1126 buf.previous = NULL;
1130 error = vfs_readdir(file, compat_filldir64, &buf);
1133 lastdirent = buf.previous;
1135 typeof(lastdirent->d_off) d_off = file->f_pos;
1136 if (__put_user_unaligned(d_off, &lastdirent->d_off))
1139 error = count - buf.count;
1145 #endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */
1147 static ssize_t compat_do_readv_writev(int type, struct file *file,
1148 const struct compat_iovec __user *uvector,
1149 unsigned long nr_segs, loff_t *pos)
1151 compat_ssize_t tot_len;
1152 struct iovec iovstack[UIO_FASTIOV];
1163 if (!access_ok(VERIFY_READ, uvector, nr_segs*sizeof(*uvector)))
1166 tot_len = compat_rw_copy_check_uvector(type, uvector, nr_segs,
1167 UIO_FASTIOV, iovstack, &iov);
1173 ret = rw_verify_area(type, file, pos, tot_len);
1179 fn = file->f_op->read;
1180 fnv = file->f_op->aio_read;
1182 fn = (io_fn_t)file->f_op->write;
1183 fnv = file->f_op->aio_write;
1187 ret = do_sync_readv_writev(file, iov, nr_segs, tot_len,
1190 ret = do_loop_readv_writev(file, iov, nr_segs, pos, fn);
1193 if (iov != iovstack)
1195 if ((ret + (type == READ)) > 0) {
1196 struct dentry *dentry = file->f_path.dentry;
1198 fsnotify_access(dentry);
1200 fsnotify_modify(dentry);
1205 static size_t compat_readv(struct file *file,
1206 const struct compat_iovec __user *vec,
1207 unsigned long vlen, loff_t *pos)
1209 ssize_t ret = -EBADF;
1211 if (!(file->f_mode & FMODE_READ))
1215 if (!file->f_op || (!file->f_op->aio_read && !file->f_op->read))
1218 ret = compat_do_readv_writev(READ, file, vec, vlen, pos);
1222 add_rchar(current, ret);
1228 compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec,
1235 file = fget_light(fd, &fput_needed);
1238 ret = compat_readv(file, vec, vlen, &file->f_pos);
1239 fput_light(file, fput_needed);
1244 compat_sys_preadv(unsigned long fd, const struct compat_iovec __user *vec,
1245 unsigned long vlen, u32 pos_low, u32 pos_high)
1247 loff_t pos = ((loff_t)pos_high << 32) | pos_low;
1254 file = fget_light(fd, &fput_needed);
1257 ret = compat_readv(file, vec, vlen, &pos);
1258 fput_light(file, fput_needed);
1262 static size_t compat_writev(struct file *file,
1263 const struct compat_iovec __user *vec,
1264 unsigned long vlen, loff_t *pos)
1266 ssize_t ret = -EBADF;
1268 if (!(file->f_mode & FMODE_WRITE))
1272 if (!file->f_op || (!file->f_op->aio_write && !file->f_op->write))
1275 ret = compat_do_readv_writev(WRITE, file, vec, vlen, pos);
1279 add_wchar(current, ret);
1285 compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec,
1292 file = fget_light(fd, &fput_needed);
1295 ret = compat_writev(file, vec, vlen, &file->f_pos);
1296 fput_light(file, fput_needed);
1301 compat_sys_pwritev(unsigned long fd, const struct compat_iovec __user *vec,
1302 unsigned long vlen, u32 pos_low, u32 pos_high)
1304 loff_t pos = ((loff_t)pos_high << 32) | pos_low;
1311 file = fget_light(fd, &fput_needed);
1314 ret = compat_writev(file, vec, vlen, &pos);
1315 fput_light(file, fput_needed);
1320 compat_sys_vmsplice(int fd, const struct compat_iovec __user *iov32,
1321 unsigned int nr_segs, unsigned int flags)
1324 struct iovec __user *iov;
1325 if (nr_segs > UIO_MAXIOV)
1327 iov = compat_alloc_user_space(nr_segs * sizeof(struct iovec));
1328 for (i = 0; i < nr_segs; i++) {
1329 struct compat_iovec v;
1330 if (get_user(v.iov_base, &iov32[i].iov_base) ||
1331 get_user(v.iov_len, &iov32[i].iov_len) ||
1332 put_user(compat_ptr(v.iov_base), &iov[i].iov_base) ||
1333 put_user(v.iov_len, &iov[i].iov_len))
1336 return sys_vmsplice(fd, iov, nr_segs, flags);
1340 * Exactly like fs/open.c:sys_open(), except that it doesn't set the
1344 compat_sys_open(const char __user *filename, int flags, int mode)
1346 return do_sys_open(AT_FDCWD, filename, flags, mode);
1350 * Exactly like fs/open.c:sys_openat(), except that it doesn't set the
1354 compat_sys_openat(unsigned int dfd, const char __user *filename, int flags, int mode)
1356 return do_sys_open(dfd, filename, flags, mode);
1360 * compat_count() counts the number of arguments/envelopes. It is basically
1361 * a copy of count() from fs/exec.c, except that it works with 32 bit argv
1362 * and envp pointers.
1364 static int compat_count(compat_uptr_t __user *argv, int max)
1372 if (get_user(p, argv))
1385 * compat_copy_strings() is basically a copy of copy_strings() from fs/exec.c
1386 * except that it works with 32 bit argv and envp pointers.
1388 static int compat_copy_strings(int argc, compat_uptr_t __user *argv,
1389 struct linux_binprm *bprm)
1391 struct page *kmapped_page = NULL;
1393 unsigned long kpos = 0;
1396 while (argc-- > 0) {
1401 if (get_user(str, argv+argc) ||
1402 !(len = strnlen_user(compat_ptr(str), MAX_ARG_STRLEN))) {
1407 if (len > MAX_ARG_STRLEN) {
1412 /* We're going to work our way backwords. */
1418 int offset, bytes_to_copy;
1420 offset = pos % PAGE_SIZE;
1424 bytes_to_copy = offset;
1425 if (bytes_to_copy > len)
1426 bytes_to_copy = len;
1428 offset -= bytes_to_copy;
1429 pos -= bytes_to_copy;
1430 str -= bytes_to_copy;
1431 len -= bytes_to_copy;
1433 if (!kmapped_page || kpos != (pos & PAGE_MASK)) {
1436 #ifdef CONFIG_STACK_GROWSUP
1437 ret = expand_stack_downwards(bprm->vma, pos);
1439 /* We've exceed the stack rlimit. */
1444 ret = get_user_pages(current, bprm->mm, pos,
1445 1, 1, 1, &page, NULL);
1447 /* We've exceed the stack rlimit. */
1453 flush_kernel_dcache_page(kmapped_page);
1454 kunmap(kmapped_page);
1455 put_page(kmapped_page);
1457 kmapped_page = page;
1458 kaddr = kmap(kmapped_page);
1459 kpos = pos & PAGE_MASK;
1460 flush_cache_page(bprm->vma, kpos,
1461 page_to_pfn(kmapped_page));
1463 if (copy_from_user(kaddr+offset, compat_ptr(str),
1473 flush_kernel_dcache_page(kmapped_page);
1474 kunmap(kmapped_page);
1475 put_page(kmapped_page);
1481 * compat_do_execve() is mostly a copy of do_execve(), with the exception
1482 * that it processes 32 bit argv and envp pointers.
1484 int compat_do_execve(char * filename,
1485 compat_uptr_t __user *argv,
1486 compat_uptr_t __user *envp,
1487 struct pt_regs * regs)
1489 struct linux_binprm *bprm;
1491 struct files_struct *displaced;
1495 retval = unshare_files(&displaced);
1500 bprm = kzalloc(sizeof(*bprm), GFP_KERNEL);
1504 retval = prepare_bprm_creds(bprm);
1508 retval = check_unsafe_exec(bprm);
1511 clear_in_exec = retval;
1512 current->in_execve = 1;
1514 file = open_exec(filename);
1515 retval = PTR_ERR(file);
1522 bprm->filename = filename;
1523 bprm->interp = filename;
1525 retval = bprm_mm_init(bprm);
1529 bprm->argc = compat_count(argv, MAX_ARG_STRINGS);
1530 if ((retval = bprm->argc) < 0)
1533 bprm->envc = compat_count(envp, MAX_ARG_STRINGS);
1534 if ((retval = bprm->envc) < 0)
1537 retval = prepare_binprm(bprm);
1541 retval = copy_strings_kernel(1, &bprm->filename, bprm);
1545 bprm->exec = bprm->p;
1546 retval = compat_copy_strings(bprm->envc, envp, bprm);
1550 retval = compat_copy_strings(bprm->argc, argv, bprm);
1554 retval = search_binary_handler(bprm, regs);
1558 /* execve succeeded */
1559 current->fs->in_exec = 0;
1560 current->in_execve = 0;
1561 acct_update_integrals(current);
1564 put_files_struct(displaced);
1573 allow_write_access(bprm->file);
1579 current->fs->in_exec = 0;
1580 current->in_execve = 0;
1587 reset_files_struct(displaced);
1592 #define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t))
1594 static int poll_select_copy_remaining(struct timespec *end_time, void __user *p,
1595 int timeval, int ret)
1602 if (current->personality & STICKY_TIMEOUTS)
1605 /* No update for zero timeout */
1606 if (!end_time->tv_sec && !end_time->tv_nsec)
1610 ts = timespec_sub(*end_time, ts);
1612 ts.tv_sec = ts.tv_nsec = 0;
1615 struct compat_timeval rtv;
1617 rtv.tv_sec = ts.tv_sec;
1618 rtv.tv_usec = ts.tv_nsec / NSEC_PER_USEC;
1620 if (!copy_to_user(p, &rtv, sizeof(rtv)))
1623 struct compat_timespec rts;
1625 rts.tv_sec = ts.tv_sec;
1626 rts.tv_nsec = ts.tv_nsec;
1628 if (!copy_to_user(p, &rts, sizeof(rts)))
1632 * If an application puts its timeval in read-only memory, we
1633 * don't want the Linux-specific update to the timeval to
1634 * cause a fault after the select has completed
1635 * successfully. However, because we're not updating the
1636 * timeval, we can't restart the system call.
1640 if (ret == -ERESTARTNOHAND)
1646 * Ooo, nasty. We need here to frob 32-bit unsigned longs to
1647 * 64-bit unsigned longs.
1650 int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
1651 unsigned long *fdset)
1653 nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS);
1657 if (!access_ok(VERIFY_WRITE, ufdset, nr*sizeof(compat_ulong_t)))
1664 if (__get_user(l, ufdset) || __get_user(h, ufdset+1))
1667 *fdset++ = h << 32 | l;
1670 if (odd && __get_user(*fdset, ufdset))
1673 /* Tricky, must clear full unsigned long in the
1674 * kernel fdset at the end, this makes sure that
1677 memset(fdset, 0, ((nr + 1) & ~1)*sizeof(compat_ulong_t));
1683 int compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
1684 unsigned long *fdset)
1687 nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS);
1698 if (__put_user(l, ufdset) || __put_user(h, ufdset+1))
1703 if (odd && __put_user(*fdset, ufdset))
1710 * This is a virtual copy of sys_select from fs/select.c and probably
1711 * should be compared to it from time to time
1715 * We can actually return ERESTARTSYS instead of EINTR, but I'd
1716 * like to be certain this leads to no problems. So I return
1717 * EINTR just for safety.
1719 * Update: ERESTARTSYS breaks at least the xview clock binary, so
1720 * I'm trying ERESTARTNOHAND which restart only when you want to.
1722 #define MAX_SELECT_SECONDS \
1723 ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1)
1725 int compat_core_sys_select(int n, compat_ulong_t __user *inp,
1726 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1727 struct timespec *end_time)
1731 int size, max_fds, ret = -EINVAL;
1732 struct fdtable *fdt;
1733 long stack_fds[SELECT_STACK_ALLOC/sizeof(long)];
1738 /* max_fds can increase, so grab it once to avoid race */
1740 fdt = files_fdtable(current->files);
1741 max_fds = fdt->max_fds;
1747 * We need 6 bitmaps (in/out/ex for both incoming and outgoing),
1748 * since we used fdset we need to allocate memory in units of
1751 size = FDS_BYTES(n);
1753 if (size > sizeof(stack_fds) / 6) {
1754 bits = kmalloc(6 * size, GFP_KERNEL);
1759 fds.in = (unsigned long *) bits;
1760 fds.out = (unsigned long *) (bits + size);
1761 fds.ex = (unsigned long *) (bits + 2*size);
1762 fds.res_in = (unsigned long *) (bits + 3*size);
1763 fds.res_out = (unsigned long *) (bits + 4*size);
1764 fds.res_ex = (unsigned long *) (bits + 5*size);
1766 if ((ret = compat_get_fd_set(n, inp, fds.in)) ||
1767 (ret = compat_get_fd_set(n, outp, fds.out)) ||
1768 (ret = compat_get_fd_set(n, exp, fds.ex)))
1770 zero_fd_set(n, fds.res_in);
1771 zero_fd_set(n, fds.res_out);
1772 zero_fd_set(n, fds.res_ex);
1774 ret = do_select(n, &fds, end_time);
1779 ret = -ERESTARTNOHAND;
1780 if (signal_pending(current))
1785 if (compat_set_fd_set(n, inp, fds.res_in) ||
1786 compat_set_fd_set(n, outp, fds.res_out) ||
1787 compat_set_fd_set(n, exp, fds.res_ex))
1790 if (bits != stack_fds)
1796 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
1797 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1798 struct compat_timeval __user *tvp)
1800 struct timespec end_time, *to = NULL;
1801 struct compat_timeval tv;
1805 if (copy_from_user(&tv, tvp, sizeof(tv)))
1809 if (poll_select_set_timeout(to,
1810 tv.tv_sec + (tv.tv_usec / USEC_PER_SEC),
1811 (tv.tv_usec % USEC_PER_SEC) * NSEC_PER_USEC))
1815 ret = compat_core_sys_select(n, inp, outp, exp, to);
1816 ret = poll_select_copy_remaining(&end_time, tvp, 1, ret);
1821 struct compat_sel_arg_struct {
1829 asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg)
1831 struct compat_sel_arg_struct a;
1833 if (copy_from_user(&a, arg, sizeof(a)))
1835 return compat_sys_select(a.n, compat_ptr(a.inp), compat_ptr(a.outp),
1836 compat_ptr(a.exp), compat_ptr(a.tvp));
1839 #ifdef HAVE_SET_RESTORE_SIGMASK
1840 static long do_compat_pselect(int n, compat_ulong_t __user *inp,
1841 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1842 struct compat_timespec __user *tsp, compat_sigset_t __user *sigmask,
1843 compat_size_t sigsetsize)
1845 compat_sigset_t ss32;
1846 sigset_t ksigmask, sigsaved;
1847 struct compat_timespec ts;
1848 struct timespec end_time, *to = NULL;
1852 if (copy_from_user(&ts, tsp, sizeof(ts)))
1856 if (poll_select_set_timeout(to, ts.tv_sec, ts.tv_nsec))
1861 if (sigsetsize != sizeof(compat_sigset_t))
1863 if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
1865 sigset_from_compat(&ksigmask, &ss32);
1867 sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP));
1868 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
1871 ret = compat_core_sys_select(n, inp, outp, exp, to);
1872 ret = poll_select_copy_remaining(&end_time, tsp, 0, ret);
1874 if (ret == -ERESTARTNOHAND) {
1876 * Don't restore the signal mask yet. Let do_signal() deliver
1877 * the signal on the way back to userspace, before the signal
1881 memcpy(¤t->saved_sigmask, &sigsaved,
1883 set_restore_sigmask();
1886 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
1891 asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp,
1892 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1893 struct compat_timespec __user *tsp, void __user *sig)
1895 compat_size_t sigsetsize = 0;
1896 compat_uptr_t up = 0;
1899 if (!access_ok(VERIFY_READ, sig,
1900 sizeof(compat_uptr_t)+sizeof(compat_size_t)) ||
1901 __get_user(up, (compat_uptr_t __user *)sig) ||
1902 __get_user(sigsetsize,
1903 (compat_size_t __user *)(sig+sizeof(up))))
1906 return do_compat_pselect(n, inp, outp, exp, tsp, compat_ptr(up),
1910 asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
1911 unsigned int nfds, struct compat_timespec __user *tsp,
1912 const compat_sigset_t __user *sigmask, compat_size_t sigsetsize)
1914 compat_sigset_t ss32;
1915 sigset_t ksigmask, sigsaved;
1916 struct compat_timespec ts;
1917 struct timespec end_time, *to = NULL;
1921 if (copy_from_user(&ts, tsp, sizeof(ts)))
1925 if (poll_select_set_timeout(to, ts.tv_sec, ts.tv_nsec))
1930 if (sigsetsize != sizeof(compat_sigset_t))
1932 if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
1934 sigset_from_compat(&ksigmask, &ss32);
1936 sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP));
1937 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
1940 ret = do_sys_poll(ufds, nfds, to);
1942 /* We can restart this syscall, usually */
1943 if (ret == -EINTR) {
1945 * Don't restore the signal mask yet. Let do_signal() deliver
1946 * the signal on the way back to userspace, before the signal
1950 memcpy(¤t->saved_sigmask, &sigsaved,
1952 set_restore_sigmask();
1954 ret = -ERESTARTNOHAND;
1956 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
1958 ret = poll_select_copy_remaining(&end_time, tsp, 0, ret);
1962 #endif /* HAVE_SET_RESTORE_SIGMASK */
1964 #if defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE)
1965 /* Stuff for NFS server syscalls... */
1966 struct compat_nfsctl_svc {
1971 struct compat_nfsctl_client {
1972 s8 cl32_ident[NFSCLNT_IDMAX+1];
1974 struct in_addr cl32_addrlist[NFSCLNT_ADDRMAX];
1977 u8 cl32_fhkey[NFSCLNT_KEYMAX];
1980 struct compat_nfsctl_export {
1981 char ex32_client[NFSCLNT_IDMAX+1];
1982 char ex32_path[NFS_MAXPATHLEN+1];
1983 compat_dev_t ex32_dev;
1984 compat_ino_t ex32_ino;
1985 compat_int_t ex32_flags;
1986 __compat_uid_t ex32_anon_uid;
1987 __compat_gid_t ex32_anon_gid;
1990 struct compat_nfsctl_fdparm {
1991 struct sockaddr gd32_addr;
1992 s8 gd32_path[NFS_MAXPATHLEN+1];
1993 compat_int_t gd32_version;
1996 struct compat_nfsctl_fsparm {
1997 struct sockaddr gd32_addr;
1998 s8 gd32_path[NFS_MAXPATHLEN+1];
1999 compat_int_t gd32_maxlen;
2002 struct compat_nfsctl_arg {
2003 compat_int_t ca32_version; /* safeguard */
2005 struct compat_nfsctl_svc u32_svc;
2006 struct compat_nfsctl_client u32_client;
2007 struct compat_nfsctl_export u32_export;
2008 struct compat_nfsctl_fdparm u32_getfd;
2009 struct compat_nfsctl_fsparm u32_getfs;
2011 #define ca32_svc u.u32_svc
2012 #define ca32_client u.u32_client
2013 #define ca32_export u.u32_export
2014 #define ca32_getfd u.u32_getfd
2015 #define ca32_getfs u.u32_getfs
2018 union compat_nfsctl_res {
2019 __u8 cr32_getfh[NFS_FHSIZE];
2020 struct knfsd_fh cr32_getfs;
2023 static int compat_nfs_svc_trans(struct nfsctl_arg *karg,
2024 struct compat_nfsctl_arg __user *arg)
2026 if (!access_ok(VERIFY_READ, &arg->ca32_svc, sizeof(arg->ca32_svc)) ||
2027 get_user(karg->ca_version, &arg->ca32_version) ||
2028 __get_user(karg->ca_svc.svc_port, &arg->ca32_svc.svc32_port) ||
2029 __get_user(karg->ca_svc.svc_nthreads,
2030 &arg->ca32_svc.svc32_nthreads))
2035 static int compat_nfs_clnt_trans(struct nfsctl_arg *karg,
2036 struct compat_nfsctl_arg __user *arg)
2038 if (!access_ok(VERIFY_READ, &arg->ca32_client,
2039 sizeof(arg->ca32_client)) ||
2040 get_user(karg->ca_version, &arg->ca32_version) ||
2041 __copy_from_user(&karg->ca_client.cl_ident[0],
2042 &arg->ca32_client.cl32_ident[0],
2044 __get_user(karg->ca_client.cl_naddr,
2045 &arg->ca32_client.cl32_naddr) ||
2046 __copy_from_user(&karg->ca_client.cl_addrlist[0],
2047 &arg->ca32_client.cl32_addrlist[0],
2048 (sizeof(struct in_addr) * NFSCLNT_ADDRMAX)) ||
2049 __get_user(karg->ca_client.cl_fhkeytype,
2050 &arg->ca32_client.cl32_fhkeytype) ||
2051 __get_user(karg->ca_client.cl_fhkeylen,
2052 &arg->ca32_client.cl32_fhkeylen) ||
2053 __copy_from_user(&karg->ca_client.cl_fhkey[0],
2054 &arg->ca32_client.cl32_fhkey[0],
2061 static int compat_nfs_exp_trans(struct nfsctl_arg *karg,
2062 struct compat_nfsctl_arg __user *arg)
2064 if (!access_ok(VERIFY_READ, &arg->ca32_export,
2065 sizeof(arg->ca32_export)) ||
2066 get_user(karg->ca_version, &arg->ca32_version) ||
2067 __copy_from_user(&karg->ca_export.ex_client[0],
2068 &arg->ca32_export.ex32_client[0],
2070 __copy_from_user(&karg->ca_export.ex_path[0],
2071 &arg->ca32_export.ex32_path[0],
2073 __get_user(karg->ca_export.ex_dev,
2074 &arg->ca32_export.ex32_dev) ||
2075 __get_user(karg->ca_export.ex_ino,
2076 &arg->ca32_export.ex32_ino) ||
2077 __get_user(karg->ca_export.ex_flags,
2078 &arg->ca32_export.ex32_flags) ||
2079 __get_user(karg->ca_export.ex_anon_uid,
2080 &arg->ca32_export.ex32_anon_uid) ||
2081 __get_user(karg->ca_export.ex_anon_gid,
2082 &arg->ca32_export.ex32_anon_gid))
2084 SET_UID(karg->ca_export.ex_anon_uid, karg->ca_export.ex_anon_uid);
2085 SET_GID(karg->ca_export.ex_anon_gid, karg->ca_export.ex_anon_gid);
2090 static int compat_nfs_getfd_trans(struct nfsctl_arg *karg,
2091 struct compat_nfsctl_arg __user *arg)
2093 if (!access_ok(VERIFY_READ, &arg->ca32_getfd,
2094 sizeof(arg->ca32_getfd)) ||
2095 get_user(karg->ca_version, &arg->ca32_version) ||
2096 __copy_from_user(&karg->ca_getfd.gd_addr,
2097 &arg->ca32_getfd.gd32_addr,
2098 (sizeof(struct sockaddr))) ||
2099 __copy_from_user(&karg->ca_getfd.gd_path,
2100 &arg->ca32_getfd.gd32_path,
2101 (NFS_MAXPATHLEN+1)) ||
2102 __get_user(karg->ca_getfd.gd_version,
2103 &arg->ca32_getfd.gd32_version))
2109 static int compat_nfs_getfs_trans(struct nfsctl_arg *karg,
2110 struct compat_nfsctl_arg __user *arg)
2112 if (!access_ok(VERIFY_READ,&arg->ca32_getfs,sizeof(arg->ca32_getfs)) ||
2113 get_user(karg->ca_version, &arg->ca32_version) ||
2114 __copy_from_user(&karg->ca_getfs.gd_addr,
2115 &arg->ca32_getfs.gd32_addr,
2116 (sizeof(struct sockaddr))) ||
2117 __copy_from_user(&karg->ca_getfs.gd_path,
2118 &arg->ca32_getfs.gd32_path,
2119 (NFS_MAXPATHLEN+1)) ||
2120 __get_user(karg->ca_getfs.gd_maxlen,
2121 &arg->ca32_getfs.gd32_maxlen))
2127 /* This really doesn't need translations, we are only passing
2128 * back a union which contains opaque nfs file handle data.
2130 static int compat_nfs_getfh_res_trans(union nfsctl_res *kres,
2131 union compat_nfsctl_res __user *res)
2135 err = copy_to_user(res, kres, sizeof(*res));
2137 return (err) ? -EFAULT : 0;
2140 asmlinkage long compat_sys_nfsservctl(int cmd,
2141 struct compat_nfsctl_arg __user *arg,
2142 union compat_nfsctl_res __user *res)
2144 struct nfsctl_arg *karg;
2145 union nfsctl_res *kres;
2149 karg = kmalloc(sizeof(*karg), GFP_USER);
2150 kres = kmalloc(sizeof(*kres), GFP_USER);
2151 if(!karg || !kres) {
2158 err = compat_nfs_svc_trans(karg, arg);
2161 case NFSCTL_ADDCLIENT:
2162 err = compat_nfs_clnt_trans(karg, arg);
2165 case NFSCTL_DELCLIENT:
2166 err = compat_nfs_clnt_trans(karg, arg);
2170 case NFSCTL_UNEXPORT:
2171 err = compat_nfs_exp_trans(karg, arg);
2175 err = compat_nfs_getfd_trans(karg, arg);
2179 err = compat_nfs_getfs_trans(karg, arg);
2192 /* The __user pointer casts are valid because of the set_fs() */
2193 err = sys_nfsservctl(cmd, (void __user *) karg, (void __user *) kres);
2199 if((cmd == NFSCTL_GETFD) ||
2200 (cmd == NFSCTL_GETFS))
2201 err = compat_nfs_getfh_res_trans(kres, res);
2209 long asmlinkage compat_sys_nfsservctl(int cmd, void *notused, void *notused2)
2211 return sys_ni_syscall();
2217 #ifdef HAVE_SET_RESTORE_SIGMASK
2218 asmlinkage long compat_sys_epoll_pwait(int epfd,
2219 struct compat_epoll_event __user *events,
2220 int maxevents, int timeout,
2221 const compat_sigset_t __user *sigmask,
2222 compat_size_t sigsetsize)
2225 compat_sigset_t csigmask;
2226 sigset_t ksigmask, sigsaved;
2229 * If the caller wants a certain signal mask to be set during the wait,
2233 if (sigsetsize != sizeof(compat_sigset_t))
2235 if (copy_from_user(&csigmask, sigmask, sizeof(csigmask)))
2237 sigset_from_compat(&ksigmask, &csigmask);
2238 sigdelsetmask(&ksigmask, sigmask(SIGKILL) | sigmask(SIGSTOP));
2239 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
2242 err = sys_epoll_wait(epfd, events, maxevents, timeout);
2245 * If we changed the signal mask, we need to restore the original one.
2246 * In case we've got a signal while waiting, we do not restore the
2247 * signal mask yet, and we allow do_signal() to deliver the signal on
2248 * the way back to userspace, before the signal mask is restored.
2251 if (err == -EINTR) {
2252 memcpy(¤t->saved_sigmask, &sigsaved,
2254 set_restore_sigmask();
2256 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
2261 #endif /* HAVE_SET_RESTORE_SIGMASK */
2263 #endif /* CONFIG_EPOLL */
2265 #ifdef CONFIG_SIGNALFD
2267 asmlinkage long compat_sys_signalfd4(int ufd,
2268 const compat_sigset_t __user *sigmask,
2269 compat_size_t sigsetsize, int flags)
2271 compat_sigset_t ss32;
2273 sigset_t __user *ksigmask;
2275 if (sigsetsize != sizeof(compat_sigset_t))
2277 if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
2279 sigset_from_compat(&tmp, &ss32);
2280 ksigmask = compat_alloc_user_space(sizeof(sigset_t));
2281 if (copy_to_user(ksigmask, &tmp, sizeof(sigset_t)))
2284 return sys_signalfd4(ufd, ksigmask, sizeof(sigset_t), flags);
2287 asmlinkage long compat_sys_signalfd(int ufd,
2288 const compat_sigset_t __user *sigmask,
2289 compat_size_t sigsetsize)
2291 return compat_sys_signalfd4(ufd, sigmask, sigsetsize, 0);
2293 #endif /* CONFIG_SIGNALFD */
2295 #ifdef CONFIG_TIMERFD
2297 asmlinkage long compat_sys_timerfd_settime(int ufd, int flags,
2298 const struct compat_itimerspec __user *utmr,
2299 struct compat_itimerspec __user *otmr)
2302 struct itimerspec t;
2303 struct itimerspec __user *ut;
2305 if (get_compat_itimerspec(&t, utmr))
2307 ut = compat_alloc_user_space(2 * sizeof(struct itimerspec));
2308 if (copy_to_user(&ut[0], &t, sizeof(t)))
2310 error = sys_timerfd_settime(ufd, flags, &ut[0], &ut[1]);
2312 error = (copy_from_user(&t, &ut[1], sizeof(struct itimerspec)) ||
2313 put_compat_itimerspec(otmr, &t)) ? -EFAULT: 0;
2318 asmlinkage long compat_sys_timerfd_gettime(int ufd,
2319 struct compat_itimerspec __user *otmr)
2322 struct itimerspec t;
2323 struct itimerspec __user *ut;
2325 ut = compat_alloc_user_space(sizeof(struct itimerspec));
2326 error = sys_timerfd_gettime(ufd, ut);
2328 error = (copy_from_user(&t, ut, sizeof(struct itimerspec)) ||
2329 put_compat_itimerspec(otmr, &t)) ? -EFAULT: 0;
2334 #endif /* CONFIG_TIMERFD */