[deliverable/linux.git] / arch / parisc / hpux / fs.c

/*
 *    Implements HPUX syscalls.
 *
 *    Copyright (C) 1999 Matthew Wilcox <willy with parisc-linux.org>
 *    Copyright (C) 2000 Michael Ang <mang with subcarrier.org>
 *    Copyright (C) 2000 John Marvin <jsm with parisc-linux.org>
 *    Copyright (C) 2000 Philipp Rumpf
 *
 *    This program is free software; you can redistribute it and/or modify
 *    it under the terms of the GNU General Public License as published by
 *    the Free Software Foundation; either version 2 of the License, or
 *    (at your option) any later version.
 *
 *    This program is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *    GNU General Public License for more details.
 *
 *    You should have received a copy of the GNU General Public License
 *    along with this program; if not, write to the Free Software
 *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/fs.h>
#include <linux/sched.h>
#include <linux/file.h>
#include <linux/slab.h>
#include <linux/ptrace.h>
#include <asm/errno.h>
#include <asm/uaccess.h>

int hpux_execve(struct pt_regs *regs)
{
	int error;
	char *filename;

	filename = getname((char __user *) regs->gr[26]);
	error = PTR_ERR(filename);
	if (IS_ERR(filename))
		goto out;

	error = do_execve(filename, (char __user * __user *) regs->gr[25],
		(char __user * __user *) regs->gr[24], regs);

	if (error == 0) {
		task_lock(current);
		current->ptrace &= ~PT_DTRACE;
		task_unlock(current);
	}
	putname(filename);

out:
	return error;
}

struct hpux_dirent {
	loff_t	d_off;
	ino_t	d_ino;
	short	d_reclen;
	short	d_namlen;
	char	d_name[1];
};

struct getdents_callback {
	struct hpux_dirent __user *current_dir;
	struct hpux_dirent __user *previous;
	int count;
	int error;
};

#define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))

static int filldir(void * __buf, const char * name, int namlen, loff_t offset,
		u64 ino, unsigned d_type)
{
	struct hpux_dirent __user * dirent;
	struct getdents_callback * buf = (struct getdents_callback *) __buf;
	ino_t d_ino;
	int reclen = ALIGN(NAME_OFFSET(dirent) + namlen + 1, sizeof(long));

	buf->error = -EINVAL;	/* only used if we fail.. */
	if (reclen > buf->count)
		return -EINVAL;
	d_ino = ino;
	if (sizeof(d_ino) < sizeof(ino) && d_ino != ino)
		return -EOVERFLOW;
	dirent = buf->previous;
	if (dirent)
		put_user(offset, &dirent->d_off);
	dirent = buf->current_dir;
	buf->previous = dirent;
	put_user(d_ino, &dirent->d_ino);
	put_user(reclen, &dirent->d_reclen);
	put_user(namlen, &dirent->d_namlen);
	copy_to_user(dirent->d_name, name, namlen);
	put_user(0, dirent->d_name + namlen);
	dirent = (void __user *)dirent + reclen;
	buf->current_dir = dirent;
	buf->count -= reclen;
	return 0;
}

#undef NAME_OFFSET

int hpux_getdents(unsigned int fd, struct hpux_dirent __user *dirent, unsigned int count)
{
	struct file * file;
	struct hpux_dirent __user * lastdirent;
	struct getdents_callback buf;
	int error = -EBADF;

	file = fget(fd);
	if (!file)
		goto out;

	buf.current_dir = dirent;
	buf.previous = NULL;
	buf.count = count;
	buf.error = 0;

	error = vfs_readdir(file, filldir, &buf);
	if (error < 0)
		goto out_putf;
	error = buf.error;
	lastdirent = buf.previous;
	if (lastdirent) {
		put_user(file->f_pos, &lastdirent->d_off);
		error = count - buf.count;
	}

out_putf:
	fput(file);
out:
	return error;
}

int hpux_mount(const char *fs, const char *path, int mflag,
		const char *fstype, const char *dataptr, int datalen)
{
	return -ENOSYS;
}

static int cp_hpux_stat(struct kstat *stat, struct hpux_stat64 __user *statbuf)
{
	struct hpux_stat64 tmp;

	/* we probably want a different split here - is hpux 12:20? */

	if (!new_valid_dev(stat->dev) || !new_valid_dev(stat->rdev))
		return -EOVERFLOW;

	memset(&tmp, 0, sizeof(tmp));
	tmp.st_dev = new_encode_dev(stat->dev);
	tmp.st_ino = stat->ino;
	tmp.st_mode = stat->mode;
	tmp.st_nlink = stat->nlink;
	tmp.st_uid = stat->uid;
	tmp.st_gid = stat->gid;
	tmp.st_rdev = new_encode_dev(stat->rdev);
	tmp.st_size = stat->size;
	tmp.st_atime = stat->atime.tv_sec;
	tmp.st_mtime = stat->mtime.tv_sec;
	tmp.st_ctime = stat->ctime.tv_sec;
	tmp.st_blocks = stat->blocks;
	tmp.st_blksize = stat->blksize;
	return copy_to_user(statbuf,&tmp,sizeof(tmp)) ? -EFAULT : 0;
}

long hpux_stat64(char __user *filename, struct hpux_stat64 __user *statbuf)
{
	struct kstat stat;
	int error = vfs_stat(filename, &stat);

	if (!error)
		error = cp_hpux_stat(&stat, statbuf);

	return error;
}

long hpux_fstat64(unsigned int fd, struct hpux_stat64 __user *statbuf)
{
	struct kstat stat;
	int error = vfs_fstat(fd, &stat);

	if (!error)
		error = cp_hpux_stat(&stat, statbuf);

	return error;
}

long hpux_lstat64(char __user *filename, struct hpux_stat64 __user *statbuf)
{
	struct kstat stat;
	int error = vfs_lstat(filename, &stat);

	if (!error)
		error = cp_hpux_stat(&stat, statbuf);

	return error;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Implements HPUX syscalls.
	3	*
	4	* Copyright (C) 1999 Matthew Wilcox <willy with parisc-linux.org>
	5	* Copyright (C) 2000 Michael Ang <mang with subcarrier.org>
	6	* Copyright (C) 2000 John Marvin <jsm with parisc-linux.org>
	7	* Copyright (C) 2000 Philipp Rumpf
	8	*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License as published by
	11	* the Free Software Foundation; either version 2 of the License, or
	12	* (at your option) any later version.
	13	*
	14	* This program is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	* GNU General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License
	20	* along with this program; if not, write to the Free Software
	21	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	22	*/
	23
ea743429	24	#include <linux/kernel.h>
1da177e4	25	#include <linux/mm.h>
4e950f6f	26	#include <linux/fs.h>
1da177e4 LT	27	#include <linux/sched.h>
1da177e4 LT	28	#include <linux/file.h>
1da177e4 LT	29	#include <linux/slab.h>
	30	#include <linux/ptrace.h>
	31	#include <asm/errno.h>
	32	#include <asm/uaccess.h>
	33
	34	int hpux_execve(struct pt_regs *regs)
	35	{
	36	int error;
	37	char *filename;
	38
e51ec241	39	filename = getname((char __user *) regs->gr[26]);
1da177e4 LT	40	error = PTR_ERR(filename);
	41	if (IS_ERR(filename))
	42	goto out;
	43
e51ec241 MW	44	error = do_execve(filename, (char __user * __user *) regs->gr[25],
e51ec241 MW	45	(char __user * __user *) regs->gr[24], regs);
1da177e4 LT	46
	47	if (error == 0) {
	48	task_lock(current);
	49	current->ptrace &= ~PT_DTRACE;
	50	task_unlock(current);
	51	}
	52	putname(filename);
	53
	54	out:
	55	return error;
	56	}
	57
	58	struct hpux_dirent {
	59	loff_t d_off;
	60	ino_t d_ino;
	61	short d_reclen;
	62	short d_namlen;
	63	char d_name[1];
	64	};
	65
	66	struct getdents_callback {
e51ec241 MW	67	struct hpux_dirent __user *current_dir;
e51ec241 MW	68	struct hpux_dirent __user *previous;
1da177e4 LT	69	int count;
	70	int error;
	71	};
	72
e51ec241	73	#define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
1da177e4 LT	74
1da177e4 LT	75	static int filldir(void * __buf, const char * name, int namlen, loff_t offset,
15c130c1	76	u64 ino, unsigned d_type)
1da177e4	77	{
e51ec241	78	struct hpux_dirent __user * dirent;
1da177e4	79	struct getdents_callback * buf = (struct getdents_callback *) __buf;
afefdbb2	80	ino_t d_ino;
ea743429	81	int reclen = ALIGN(NAME_OFFSET(dirent) + namlen + 1, sizeof(long));
1da177e4 LT	82
	83	buf->error = -EINVAL; /* only used if we fail.. */
	84	if (reclen > buf->count)
	85	return -EINVAL;
afefdbb2 DH	86	d_ino = ino;
	87	if (sizeof(d_ino) < sizeof(ino) && d_ino != ino)
	88	return -EOVERFLOW;
1da177e4 LT	89	dirent = buf->previous;
	90	if (dirent)
	91	put_user(offset, &dirent->d_off);
	92	dirent = buf->current_dir;
	93	buf->previous = dirent;
afefdbb2	94	put_user(d_ino, &dirent->d_ino);
1da177e4 LT	95	put_user(reclen, &dirent->d_reclen);
	96	put_user(namlen, &dirent->d_namlen);
	97	copy_to_user(dirent->d_name, name, namlen);
	98	put_user(0, dirent->d_name + namlen);
32f46813	99	dirent = (void __user *)dirent + reclen;
1da177e4 LT	100	buf->current_dir = dirent;
	101	buf->count -= reclen;
	102	return 0;
	103	}
	104
	105	#undef NAME_OFFSET
1da177e4	106
e51ec241	107	int hpux_getdents(unsigned int fd, struct hpux_dirent __user *dirent, unsigned int count)
1da177e4 LT	108	{
1da177e4 LT	109	struct file * file;
e51ec241	110	struct hpux_dirent __user * lastdirent;
1da177e4 LT	111	struct getdents_callback buf;
	112	int error = -EBADF;
	113
	114	file = fget(fd);
	115	if (!file)
	116	goto out;
	117
	118	buf.current_dir = dirent;
	119	buf.previous = NULL;
	120	buf.count = count;
	121	buf.error = 0;
	122
	123	error = vfs_readdir(file, filldir, &buf);
	124	if (error < 0)
	125	goto out_putf;
	126	error = buf.error;
	127	lastdirent = buf.previous;
	128	if (lastdirent) {
	129	put_user(file->f_pos, &lastdirent->d_off);
	130	error = count - buf.count;
	131	}
	132
	133	out_putf:
	134	fput(file);
	135	out:
	136	return error;
	137	}
	138
	139	int hpux_mount(const char fs, const char path, int mflag,
	140	const char fstype, const char dataptr, int datalen)
	141	{
	142	return -ENOSYS;
	143	}
	144
e51ec241	145	static int cp_hpux_stat(struct kstat stat, struct hpux_stat64 __user statbuf)
1da177e4 LT	146	{
	147	struct hpux_stat64 tmp;
	148
	149	/* we probably want a different split here - is hpux 12:20? */
	150
	151	if (!new_valid_dev(stat->dev) \|\| !new_valid_dev(stat->rdev))
	152	return -EOVERFLOW;
	153
	154	memset(&tmp, 0, sizeof(tmp));
	155	tmp.st_dev = new_encode_dev(stat->dev);
	156	tmp.st_ino = stat->ino;
	157	tmp.st_mode = stat->mode;
	158	tmp.st_nlink = stat->nlink;
	159	tmp.st_uid = stat->uid;
	160	tmp.st_gid = stat->gid;
	161	tmp.st_rdev = new_encode_dev(stat->rdev);
	162	tmp.st_size = stat->size;
	163	tmp.st_atime = stat->atime.tv_sec;
	164	tmp.st_mtime = stat->mtime.tv_sec;
	165	tmp.st_ctime = stat->ctime.tv_sec;
	166	tmp.st_blocks = stat->blocks;
	167	tmp.st_blksize = stat->blksize;
	168	return copy_to_user(statbuf,&tmp,sizeof(tmp)) ? -EFAULT : 0;
	169	}
	170
e51ec241	171	long hpux_stat64(char __user filename, struct hpux_stat64 __user statbuf)
1da177e4 LT	172	{
	173	struct kstat stat;
	174	int error = vfs_stat(filename, &stat);
	175
	176	if (!error)
	177	error = cp_hpux_stat(&stat, statbuf);
	178
	179	return error;
	180	}
	181
e51ec241	182	long hpux_fstat64(unsigned int fd, struct hpux_stat64 __user *statbuf)
1da177e4 LT	183	{
	184	struct kstat stat;
	185	int error = vfs_fstat(fd, &stat);
	186
	187	if (!error)
	188	error = cp_hpux_stat(&stat, statbuf);
	189
	190	return error;
	191	}
	192
e51ec241	193	long hpux_lstat64(char __user filename, struct hpux_stat64 __user statbuf)
1da177e4 LT	194	{
	195	struct kstat stat;
	196	int error = vfs_lstat(filename, &stat);
	197
	198	if (!error)
	199	error = cp_hpux_stat(&stat, statbuf);
	200
	201	return error;
	202	}