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1369 lines
32 KiB
1369 lines
32 KiB
// SPDX-License-Identifier: GPL-2.0 |
|
/* |
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* linux/arch/alpha/kernel/osf_sys.c |
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* |
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* Copyright (C) 1995 Linus Torvalds |
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*/ |
|
|
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/* |
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* This file handles some of the stranger OSF/1 system call interfaces. |
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* Some of the system calls expect a non-C calling standard, others have |
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* special parameter blocks.. |
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*/ |
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|
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#include <linux/errno.h> |
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#include <linux/sched/signal.h> |
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#include <linux/sched/mm.h> |
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#include <linux/sched/task_stack.h> |
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#include <linux/sched/cputime.h> |
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#include <linux/kernel.h> |
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#include <linux/mm.h> |
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#include <linux/smp.h> |
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#include <linux/stddef.h> |
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#include <linux/syscalls.h> |
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#include <linux/unistd.h> |
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#include <linux/ptrace.h> |
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#include <linux/user.h> |
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#include <linux/utsname.h> |
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#include <linux/time.h> |
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#include <linux/timex.h> |
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#include <linux/major.h> |
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#include <linux/stat.h> |
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#include <linux/mman.h> |
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#include <linux/shm.h> |
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#include <linux/poll.h> |
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#include <linux/file.h> |
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#include <linux/types.h> |
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#include <linux/ipc.h> |
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#include <linux/namei.h> |
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#include <linux/uio.h> |
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#include <linux/vfs.h> |
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#include <linux/rcupdate.h> |
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#include <linux/slab.h> |
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|
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#include <asm/fpu.h> |
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#include <asm/io.h> |
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#include <linux/uaccess.h> |
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#include <asm/sysinfo.h> |
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#include <asm/thread_info.h> |
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#include <asm/hwrpb.h> |
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#include <asm/processor.h> |
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|
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/* |
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* Brk needs to return an error. Still support Linux's brk(0) query idiom, |
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* which OSF programs just shouldn't be doing. We're still not quite |
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* identical to OSF as we don't return 0 on success, but doing otherwise |
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* would require changes to libc. Hopefully this is good enough. |
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*/ |
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SYSCALL_DEFINE1(osf_brk, unsigned long, brk) |
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{ |
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unsigned long retval = sys_brk(brk); |
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if (brk && brk != retval) |
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retval = -ENOMEM; |
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return retval; |
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} |
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|
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/* |
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* This is pure guess-work.. |
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*/ |
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SYSCALL_DEFINE4(osf_set_program_attributes, unsigned long, text_start, |
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unsigned long, text_len, unsigned long, bss_start, |
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unsigned long, bss_len) |
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{ |
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struct mm_struct *mm; |
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|
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mm = current->mm; |
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mm->end_code = bss_start + bss_len; |
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mm->start_brk = bss_start + bss_len; |
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mm->brk = bss_start + bss_len; |
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#if 0 |
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printk("set_program_attributes(%lx %lx %lx %lx)\n", |
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text_start, text_len, bss_start, bss_len); |
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#endif |
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return 0; |
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} |
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|
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/* |
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* OSF/1 directory handling functions... |
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* |
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* The "getdents()" interface is much more sane: the "basep" stuff is |
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* braindamage (it can't really handle filesystems where the directory |
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* offset differences aren't the same as "d_reclen"). |
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*/ |
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#define NAME_OFFSET offsetof (struct osf_dirent, d_name) |
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|
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struct osf_dirent { |
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unsigned int d_ino; |
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unsigned short d_reclen; |
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unsigned short d_namlen; |
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char d_name[1]; |
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}; |
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|
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struct osf_dirent_callback { |
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struct dir_context ctx; |
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struct osf_dirent __user *dirent; |
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long __user *basep; |
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unsigned int count; |
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int error; |
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}; |
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|
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static int |
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osf_filldir(struct dir_context *ctx, const char *name, int namlen, |
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loff_t offset, u64 ino, unsigned int d_type) |
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{ |
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struct osf_dirent __user *dirent; |
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struct osf_dirent_callback *buf = |
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container_of(ctx, struct osf_dirent_callback, ctx); |
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unsigned int reclen = ALIGN(NAME_OFFSET + namlen + 1, sizeof(u32)); |
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unsigned int d_ino; |
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|
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buf->error = -EINVAL; /* only used if we fail */ |
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if (reclen > buf->count) |
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return -EINVAL; |
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d_ino = ino; |
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if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) { |
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buf->error = -EOVERFLOW; |
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return -EOVERFLOW; |
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} |
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if (buf->basep) { |
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if (put_user(offset, buf->basep)) |
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goto Efault; |
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buf->basep = NULL; |
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} |
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dirent = buf->dirent; |
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if (put_user(d_ino, &dirent->d_ino) || |
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put_user(namlen, &dirent->d_namlen) || |
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put_user(reclen, &dirent->d_reclen) || |
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copy_to_user(dirent->d_name, name, namlen) || |
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put_user(0, dirent->d_name + namlen)) |
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goto Efault; |
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dirent = (void __user *)dirent + reclen; |
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buf->dirent = dirent; |
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buf->count -= reclen; |
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return 0; |
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Efault: |
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buf->error = -EFAULT; |
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return -EFAULT; |
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} |
|
|
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SYSCALL_DEFINE4(osf_getdirentries, unsigned int, fd, |
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struct osf_dirent __user *, dirent, unsigned int, count, |
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long __user *, basep) |
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{ |
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int error; |
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struct fd arg = fdget_pos(fd); |
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struct osf_dirent_callback buf = { |
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.ctx.actor = osf_filldir, |
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.dirent = dirent, |
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.basep = basep, |
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.count = count |
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}; |
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|
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if (!arg.file) |
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return -EBADF; |
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|
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error = iterate_dir(arg.file, &buf.ctx); |
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if (error >= 0) |
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error = buf.error; |
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if (count != buf.count) |
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error = count - buf.count; |
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|
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fdput_pos(arg); |
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return error; |
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} |
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|
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#undef NAME_OFFSET |
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|
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SYSCALL_DEFINE6(osf_mmap, unsigned long, addr, unsigned long, len, |
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unsigned long, prot, unsigned long, flags, unsigned long, fd, |
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unsigned long, off) |
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{ |
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unsigned long ret = -EINVAL; |
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|
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#if 0 |
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if (flags & (_MAP_HASSEMAPHORE | _MAP_INHERIT | _MAP_UNALIGNED)) |
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printk("%s: unimplemented OSF mmap flags %04lx\n", |
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current->comm, flags); |
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#endif |
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if ((off + PAGE_ALIGN(len)) < off) |
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goto out; |
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if (off & ~PAGE_MASK) |
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goto out; |
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ret = ksys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT); |
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out: |
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return ret; |
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} |
|
|
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struct osf_stat { |
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int st_dev; |
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int st_pad1; |
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unsigned st_mode; |
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unsigned short st_nlink; |
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short st_nlink_reserved; |
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unsigned st_uid; |
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unsigned st_gid; |
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int st_rdev; |
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int st_ldev; |
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long st_size; |
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int st_pad2; |
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int st_uatime; |
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int st_pad3; |
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int st_umtime; |
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int st_pad4; |
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int st_uctime; |
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int st_pad5; |
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int st_pad6; |
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unsigned st_flags; |
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unsigned st_gen; |
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long st_spare[4]; |
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unsigned st_ino; |
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int st_ino_reserved; |
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int st_atime; |
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int st_atime_reserved; |
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int st_mtime; |
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int st_mtime_reserved; |
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int st_ctime; |
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int st_ctime_reserved; |
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long st_blksize; |
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long st_blocks; |
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}; |
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|
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/* |
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* The OSF/1 statfs structure is much larger, but this should |
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* match the beginning, at least. |
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*/ |
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struct osf_statfs { |
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short f_type; |
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short f_flags; |
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int f_fsize; |
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int f_bsize; |
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int f_blocks; |
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int f_bfree; |
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int f_bavail; |
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int f_files; |
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int f_ffree; |
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__kernel_fsid_t f_fsid; |
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}; |
|
|
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struct osf_statfs64 { |
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short f_type; |
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short f_flags; |
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int f_pad1; |
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int f_pad2; |
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int f_pad3; |
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int f_pad4; |
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int f_pad5; |
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int f_pad6; |
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int f_pad7; |
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__kernel_fsid_t f_fsid; |
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u_short f_namemax; |
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short f_reserved1; |
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int f_spare[8]; |
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char f_pad8[90]; |
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char f_pad9[90]; |
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long mount_info[10]; |
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u_long f_flags2; |
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long f_spare2[14]; |
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long f_fsize; |
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long f_bsize; |
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long f_blocks; |
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long f_bfree; |
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long f_bavail; |
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long f_files; |
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long f_ffree; |
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}; |
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|
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static int |
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linux_to_osf_stat(struct kstat *lstat, struct osf_stat __user *osf_stat) |
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{ |
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struct osf_stat tmp = { 0 }; |
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|
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tmp.st_dev = lstat->dev; |
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tmp.st_mode = lstat->mode; |
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tmp.st_nlink = lstat->nlink; |
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tmp.st_uid = from_kuid_munged(current_user_ns(), lstat->uid); |
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tmp.st_gid = from_kgid_munged(current_user_ns(), lstat->gid); |
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tmp.st_rdev = lstat->rdev; |
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tmp.st_ldev = lstat->rdev; |
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tmp.st_size = lstat->size; |
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tmp.st_uatime = lstat->atime.tv_nsec / 1000; |
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tmp.st_umtime = lstat->mtime.tv_nsec / 1000; |
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tmp.st_uctime = lstat->ctime.tv_nsec / 1000; |
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tmp.st_ino = lstat->ino; |
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tmp.st_atime = lstat->atime.tv_sec; |
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tmp.st_mtime = lstat->mtime.tv_sec; |
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tmp.st_ctime = lstat->ctime.tv_sec; |
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tmp.st_blksize = lstat->blksize; |
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tmp.st_blocks = lstat->blocks; |
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|
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return copy_to_user(osf_stat, &tmp, sizeof(tmp)) ? -EFAULT : 0; |
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} |
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|
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static int |
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linux_to_osf_statfs(struct kstatfs *linux_stat, struct osf_statfs __user *osf_stat, |
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unsigned long bufsiz) |
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{ |
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struct osf_statfs tmp_stat; |
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|
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tmp_stat.f_type = linux_stat->f_type; |
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tmp_stat.f_flags = 0; /* mount flags */ |
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tmp_stat.f_fsize = linux_stat->f_frsize; |
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tmp_stat.f_bsize = linux_stat->f_bsize; |
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tmp_stat.f_blocks = linux_stat->f_blocks; |
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tmp_stat.f_bfree = linux_stat->f_bfree; |
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tmp_stat.f_bavail = linux_stat->f_bavail; |
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tmp_stat.f_files = linux_stat->f_files; |
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tmp_stat.f_ffree = linux_stat->f_ffree; |
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tmp_stat.f_fsid = linux_stat->f_fsid; |
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if (bufsiz > sizeof(tmp_stat)) |
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bufsiz = sizeof(tmp_stat); |
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return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0; |
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} |
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|
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static int |
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linux_to_osf_statfs64(struct kstatfs *linux_stat, struct osf_statfs64 __user *osf_stat, |
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unsigned long bufsiz) |
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{ |
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struct osf_statfs64 tmp_stat = { 0 }; |
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|
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tmp_stat.f_type = linux_stat->f_type; |
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tmp_stat.f_fsize = linux_stat->f_frsize; |
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tmp_stat.f_bsize = linux_stat->f_bsize; |
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tmp_stat.f_blocks = linux_stat->f_blocks; |
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tmp_stat.f_bfree = linux_stat->f_bfree; |
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tmp_stat.f_bavail = linux_stat->f_bavail; |
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tmp_stat.f_files = linux_stat->f_files; |
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tmp_stat.f_ffree = linux_stat->f_ffree; |
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tmp_stat.f_fsid = linux_stat->f_fsid; |
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if (bufsiz > sizeof(tmp_stat)) |
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bufsiz = sizeof(tmp_stat); |
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return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0; |
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} |
|
|
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SYSCALL_DEFINE3(osf_statfs, const char __user *, pathname, |
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struct osf_statfs __user *, buffer, unsigned long, bufsiz) |
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{ |
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struct kstatfs linux_stat; |
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int error = user_statfs(pathname, &linux_stat); |
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if (!error) |
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error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz); |
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return error; |
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} |
|
|
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SYSCALL_DEFINE2(osf_stat, char __user *, name, struct osf_stat __user *, buf) |
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{ |
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struct kstat stat; |
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int error; |
|
|
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error = vfs_stat(name, &stat); |
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if (error) |
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return error; |
|
|
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return linux_to_osf_stat(&stat, buf); |
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} |
|
|
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SYSCALL_DEFINE2(osf_lstat, char __user *, name, struct osf_stat __user *, buf) |
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{ |
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struct kstat stat; |
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int error; |
|
|
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error = vfs_lstat(name, &stat); |
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if (error) |
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return error; |
|
|
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return linux_to_osf_stat(&stat, buf); |
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} |
|
|
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SYSCALL_DEFINE2(osf_fstat, int, fd, struct osf_stat __user *, buf) |
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{ |
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struct kstat stat; |
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int error; |
|
|
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error = vfs_fstat(fd, &stat); |
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if (error) |
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return error; |
|
|
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return linux_to_osf_stat(&stat, buf); |
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} |
|
|
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SYSCALL_DEFINE3(osf_fstatfs, unsigned long, fd, |
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struct osf_statfs __user *, buffer, unsigned long, bufsiz) |
|
{ |
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struct kstatfs linux_stat; |
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int error = fd_statfs(fd, &linux_stat); |
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if (!error) |
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error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz); |
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return error; |
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} |
|
|
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SYSCALL_DEFINE3(osf_statfs64, char __user *, pathname, |
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struct osf_statfs64 __user *, buffer, unsigned long, bufsiz) |
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{ |
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struct kstatfs linux_stat; |
|
int error = user_statfs(pathname, &linux_stat); |
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if (!error) |
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error = linux_to_osf_statfs64(&linux_stat, buffer, bufsiz); |
|
return error; |
|
} |
|
|
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SYSCALL_DEFINE3(osf_fstatfs64, unsigned long, fd, |
|
struct osf_statfs64 __user *, buffer, unsigned long, bufsiz) |
|
{ |
|
struct kstatfs linux_stat; |
|
int error = fd_statfs(fd, &linux_stat); |
|
if (!error) |
|
error = linux_to_osf_statfs64(&linux_stat, buffer, bufsiz); |
|
return error; |
|
} |
|
|
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/* |
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* Uhh.. OSF/1 mount parameters aren't exactly obvious.. |
|
* |
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* Although to be frank, neither are the native Linux/i386 ones.. |
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*/ |
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struct ufs_args { |
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char __user *devname; |
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int flags; |
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uid_t exroot; |
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}; |
|
|
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struct cdfs_args { |
|
char __user *devname; |
|
int flags; |
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uid_t exroot; |
|
|
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/* This has lots more here, which Linux handles with the option block |
|
but I'm too lazy to do the translation into ASCII. */ |
|
}; |
|
|
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struct procfs_args { |
|
char __user *devname; |
|
int flags; |
|
uid_t exroot; |
|
}; |
|
|
|
/* |
|
* We can't actually handle ufs yet, so we translate UFS mounts to |
|
* ext2fs mounts. I wouldn't mind a UFS filesystem, but the UFS |
|
* layout is so braindead it's a major headache doing it. |
|
* |
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* Just how long ago was it written? OTOH our UFS driver may be still |
|
* unhappy with OSF UFS. [CHECKME] |
|
*/ |
|
static int |
|
osf_ufs_mount(const char __user *dirname, |
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struct ufs_args __user *args, int flags) |
|
{ |
|
int retval; |
|
struct cdfs_args tmp; |
|
struct filename *devname; |
|
|
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retval = -EFAULT; |
|
if (copy_from_user(&tmp, args, sizeof(tmp))) |
|
goto out; |
|
devname = getname(tmp.devname); |
|
retval = PTR_ERR(devname); |
|
if (IS_ERR(devname)) |
|
goto out; |
|
retval = do_mount(devname->name, dirname, "ext2", flags, NULL); |
|
putname(devname); |
|
out: |
|
return retval; |
|
} |
|
|
|
static int |
|
osf_cdfs_mount(const char __user *dirname, |
|
struct cdfs_args __user *args, int flags) |
|
{ |
|
int retval; |
|
struct cdfs_args tmp; |
|
struct filename *devname; |
|
|
|
retval = -EFAULT; |
|
if (copy_from_user(&tmp, args, sizeof(tmp))) |
|
goto out; |
|
devname = getname(tmp.devname); |
|
retval = PTR_ERR(devname); |
|
if (IS_ERR(devname)) |
|
goto out; |
|
retval = do_mount(devname->name, dirname, "iso9660", flags, NULL); |
|
putname(devname); |
|
out: |
|
return retval; |
|
} |
|
|
|
static int |
|
osf_procfs_mount(const char __user *dirname, |
|
struct procfs_args __user *args, int flags) |
|
{ |
|
struct procfs_args tmp; |
|
|
|
if (copy_from_user(&tmp, args, sizeof(tmp))) |
|
return -EFAULT; |
|
|
|
return do_mount("", dirname, "proc", flags, NULL); |
|
} |
|
|
|
SYSCALL_DEFINE4(osf_mount, unsigned long, typenr, const char __user *, path, |
|
int, flag, void __user *, data) |
|
{ |
|
int retval; |
|
|
|
switch (typenr) { |
|
case 1: |
|
retval = osf_ufs_mount(path, data, flag); |
|
break; |
|
case 6: |
|
retval = osf_cdfs_mount(path, data, flag); |
|
break; |
|
case 9: |
|
retval = osf_procfs_mount(path, data, flag); |
|
break; |
|
default: |
|
retval = -EINVAL; |
|
printk("osf_mount(%ld, %x)\n", typenr, flag); |
|
} |
|
|
|
return retval; |
|
} |
|
|
|
SYSCALL_DEFINE1(osf_utsname, char __user *, name) |
|
{ |
|
char tmp[5 * 32]; |
|
|
|
down_read(&uts_sem); |
|
memcpy(tmp + 0 * 32, utsname()->sysname, 32); |
|
memcpy(tmp + 1 * 32, utsname()->nodename, 32); |
|
memcpy(tmp + 2 * 32, utsname()->release, 32); |
|
memcpy(tmp + 3 * 32, utsname()->version, 32); |
|
memcpy(tmp + 4 * 32, utsname()->machine, 32); |
|
up_read(&uts_sem); |
|
|
|
if (copy_to_user(name, tmp, sizeof(tmp))) |
|
return -EFAULT; |
|
return 0; |
|
} |
|
|
|
SYSCALL_DEFINE0(getpagesize) |
|
{ |
|
return PAGE_SIZE; |
|
} |
|
|
|
SYSCALL_DEFINE0(getdtablesize) |
|
{ |
|
return sysctl_nr_open; |
|
} |
|
|
|
/* |
|
* For compatibility with OSF/1 only. Use utsname(2) instead. |
|
*/ |
|
SYSCALL_DEFINE2(osf_getdomainname, char __user *, name, int, namelen) |
|
{ |
|
int len; |
|
char *kname; |
|
char tmp[32]; |
|
|
|
if (namelen < 0 || namelen > 32) |
|
namelen = 32; |
|
|
|
down_read(&uts_sem); |
|
kname = utsname()->domainname; |
|
len = strnlen(kname, namelen); |
|
len = min(len + 1, namelen); |
|
memcpy(tmp, kname, len); |
|
up_read(&uts_sem); |
|
|
|
if (copy_to_user(name, tmp, len)) |
|
return -EFAULT; |
|
return 0; |
|
} |
|
|
|
/* |
|
* The following stuff should move into a header file should it ever |
|
* be labeled "officially supported." Right now, there is just enough |
|
* support to avoid applications (such as tar) printing error |
|
* messages. The attributes are not really implemented. |
|
*/ |
|
|
|
/* |
|
* Values for Property list entry flag |
|
*/ |
|
#define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry |
|
by default */ |
|
#define PLE_FLAG_MASK 0x1 /* Valid flag values */ |
|
#define PLE_FLAG_ALL -1 /* All flag value */ |
|
|
|
struct proplistname_args { |
|
unsigned int pl_mask; |
|
unsigned int pl_numnames; |
|
char **pl_names; |
|
}; |
|
|
|
union pl_args { |
|
struct setargs { |
|
char __user *path; |
|
long follow; |
|
long nbytes; |
|
char __user *buf; |
|
} set; |
|
struct fsetargs { |
|
long fd; |
|
long nbytes; |
|
char __user *buf; |
|
} fset; |
|
struct getargs { |
|
char __user *path; |
|
long follow; |
|
struct proplistname_args __user *name_args; |
|
long nbytes; |
|
char __user *buf; |
|
int __user *min_buf_size; |
|
} get; |
|
struct fgetargs { |
|
long fd; |
|
struct proplistname_args __user *name_args; |
|
long nbytes; |
|
char __user *buf; |
|
int __user *min_buf_size; |
|
} fget; |
|
struct delargs { |
|
char __user *path; |
|
long follow; |
|
struct proplistname_args __user *name_args; |
|
} del; |
|
struct fdelargs { |
|
long fd; |
|
struct proplistname_args __user *name_args; |
|
} fdel; |
|
}; |
|
|
|
enum pl_code { |
|
PL_SET = 1, PL_FSET = 2, |
|
PL_GET = 3, PL_FGET = 4, |
|
PL_DEL = 5, PL_FDEL = 6 |
|
}; |
|
|
|
SYSCALL_DEFINE2(osf_proplist_syscall, enum pl_code, code, |
|
union pl_args __user *, args) |
|
{ |
|
long error; |
|
int __user *min_buf_size_ptr; |
|
|
|
switch (code) { |
|
case PL_SET: |
|
if (get_user(error, &args->set.nbytes)) |
|
error = -EFAULT; |
|
break; |
|
case PL_FSET: |
|
if (get_user(error, &args->fset.nbytes)) |
|
error = -EFAULT; |
|
break; |
|
case PL_GET: |
|
error = get_user(min_buf_size_ptr, &args->get.min_buf_size); |
|
if (error) |
|
break; |
|
error = put_user(0, min_buf_size_ptr); |
|
break; |
|
case PL_FGET: |
|
error = get_user(min_buf_size_ptr, &args->fget.min_buf_size); |
|
if (error) |
|
break; |
|
error = put_user(0, min_buf_size_ptr); |
|
break; |
|
case PL_DEL: |
|
case PL_FDEL: |
|
error = 0; |
|
break; |
|
default: |
|
error = -EOPNOTSUPP; |
|
break; |
|
} |
|
return error; |
|
} |
|
|
|
SYSCALL_DEFINE2(osf_sigstack, struct sigstack __user *, uss, |
|
struct sigstack __user *, uoss) |
|
{ |
|
unsigned long usp = rdusp(); |
|
unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size; |
|
unsigned long oss_os = on_sig_stack(usp); |
|
int error; |
|
|
|
if (uss) { |
|
void __user *ss_sp; |
|
|
|
error = -EFAULT; |
|
if (get_user(ss_sp, &uss->ss_sp)) |
|
goto out; |
|
|
|
/* If the current stack was set with sigaltstack, don't |
|
swap stacks while we are on it. */ |
|
error = -EPERM; |
|
if (current->sas_ss_sp && on_sig_stack(usp)) |
|
goto out; |
|
|
|
/* Since we don't know the extent of the stack, and we don't |
|
track onstack-ness, but rather calculate it, we must |
|
presume a size. Ho hum this interface is lossy. */ |
|
current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ; |
|
current->sas_ss_size = SIGSTKSZ; |
|
} |
|
|
|
if (uoss) { |
|
error = -EFAULT; |
|
if (put_user(oss_sp, &uoss->ss_sp) || |
|
put_user(oss_os, &uoss->ss_onstack)) |
|
goto out; |
|
} |
|
|
|
error = 0; |
|
out: |
|
return error; |
|
} |
|
|
|
SYSCALL_DEFINE3(osf_sysinfo, int, command, char __user *, buf, long, count) |
|
{ |
|
const char *sysinfo_table[] = { |
|
utsname()->sysname, |
|
utsname()->nodename, |
|
utsname()->release, |
|
utsname()->version, |
|
utsname()->machine, |
|
"alpha", /* instruction set architecture */ |
|
"dummy", /* hardware serial number */ |
|
"dummy", /* hardware manufacturer */ |
|
"dummy", /* secure RPC domain */ |
|
}; |
|
unsigned long offset; |
|
const char *res; |
|
long len; |
|
char tmp[__NEW_UTS_LEN + 1]; |
|
|
|
offset = command-1; |
|
if (offset >= ARRAY_SIZE(sysinfo_table)) { |
|
/* Digital UNIX has a few unpublished interfaces here */ |
|
printk("sysinfo(%d)", command); |
|
return -EINVAL; |
|
} |
|
|
|
down_read(&uts_sem); |
|
res = sysinfo_table[offset]; |
|
len = strlen(res)+1; |
|
if ((unsigned long)len > (unsigned long)count) |
|
len = count; |
|
memcpy(tmp, res, len); |
|
up_read(&uts_sem); |
|
if (copy_to_user(buf, tmp, len)) |
|
return -EFAULT; |
|
return 0; |
|
} |
|
|
|
SYSCALL_DEFINE5(osf_getsysinfo, unsigned long, op, void __user *, buffer, |
|
unsigned long, nbytes, int __user *, start, void __user *, arg) |
|
{ |
|
unsigned long w; |
|
struct percpu_struct *cpu; |
|
|
|
switch (op) { |
|
case GSI_IEEE_FP_CONTROL: |
|
/* Return current software fp control & status bits. */ |
|
/* Note that DU doesn't verify available space here. */ |
|
|
|
w = current_thread_info()->ieee_state & IEEE_SW_MASK; |
|
w = swcr_update_status(w, rdfpcr()); |
|
if (put_user(w, (unsigned long __user *) buffer)) |
|
return -EFAULT; |
|
return 0; |
|
|
|
case GSI_IEEE_STATE_AT_SIGNAL: |
|
/* |
|
* Not sure anybody will ever use this weird stuff. These |
|
* ops can be used (under OSF/1) to set the fpcr that should |
|
* be used when a signal handler starts executing. |
|
*/ |
|
break; |
|
|
|
case GSI_UACPROC: |
|
if (nbytes < sizeof(unsigned int)) |
|
return -EINVAL; |
|
w = current_thread_info()->status & UAC_BITMASK; |
|
if (put_user(w, (unsigned int __user *)buffer)) |
|
return -EFAULT; |
|
return 1; |
|
|
|
case GSI_PROC_TYPE: |
|
if (nbytes < sizeof(unsigned long)) |
|
return -EINVAL; |
|
cpu = (struct percpu_struct*) |
|
((char*)hwrpb + hwrpb->processor_offset); |
|
w = cpu->type; |
|
if (put_user(w, (unsigned long __user*)buffer)) |
|
return -EFAULT; |
|
return 1; |
|
|
|
case GSI_GET_HWRPB: |
|
if (nbytes > sizeof(*hwrpb)) |
|
return -EINVAL; |
|
if (copy_to_user(buffer, hwrpb, nbytes) != 0) |
|
return -EFAULT; |
|
return 1; |
|
|
|
default: |
|
break; |
|
} |
|
|
|
return -EOPNOTSUPP; |
|
} |
|
|
|
SYSCALL_DEFINE5(osf_setsysinfo, unsigned long, op, void __user *, buffer, |
|
unsigned long, nbytes, int __user *, start, void __user *, arg) |
|
{ |
|
switch (op) { |
|
case SSI_IEEE_FP_CONTROL: { |
|
unsigned long swcr, fpcr; |
|
unsigned int *state; |
|
|
|
/* |
|
* Alpha Architecture Handbook 4.7.7.3: |
|
* To be fully IEEE compiant, we must track the current IEEE |
|
* exception state in software, because spurious bits can be |
|
* set in the trap shadow of a software-complete insn. |
|
*/ |
|
|
|
if (get_user(swcr, (unsigned long __user *)buffer)) |
|
return -EFAULT; |
|
state = ¤t_thread_info()->ieee_state; |
|
|
|
/* Update softare trap enable bits. */ |
|
*state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK); |
|
|
|
/* Update the real fpcr. */ |
|
fpcr = rdfpcr() & FPCR_DYN_MASK; |
|
fpcr |= ieee_swcr_to_fpcr(swcr); |
|
wrfpcr(fpcr); |
|
|
|
return 0; |
|
} |
|
|
|
case SSI_IEEE_RAISE_EXCEPTION: { |
|
unsigned long exc, swcr, fpcr, fex; |
|
unsigned int *state; |
|
|
|
if (get_user(exc, (unsigned long __user *)buffer)) |
|
return -EFAULT; |
|
state = ¤t_thread_info()->ieee_state; |
|
exc &= IEEE_STATUS_MASK; |
|
|
|
/* Update softare trap enable bits. */ |
|
swcr = (*state & IEEE_SW_MASK) | exc; |
|
*state |= exc; |
|
|
|
/* Update the real fpcr. */ |
|
fpcr = rdfpcr(); |
|
fpcr |= ieee_swcr_to_fpcr(swcr); |
|
wrfpcr(fpcr); |
|
|
|
/* If any exceptions set by this call, and are unmasked, |
|
send a signal. Old exceptions are not signaled. */ |
|
fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr; |
|
if (fex) { |
|
int si_code = FPE_FLTUNK; |
|
|
|
if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND; |
|
if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES; |
|
if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND; |
|
if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF; |
|
if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV; |
|
if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV; |
|
|
|
send_sig_fault(SIGFPE, si_code, |
|
(void __user *)NULL, /* FIXME */ |
|
0, current); |
|
} |
|
return 0; |
|
} |
|
|
|
case SSI_IEEE_STATE_AT_SIGNAL: |
|
case SSI_IEEE_IGNORE_STATE_AT_SIGNAL: |
|
/* |
|
* Not sure anybody will ever use this weird stuff. These |
|
* ops can be used (under OSF/1) to set the fpcr that should |
|
* be used when a signal handler starts executing. |
|
*/ |
|
break; |
|
|
|
case SSI_NVPAIRS: { |
|
unsigned __user *p = buffer; |
|
unsigned i; |
|
|
|
for (i = 0, p = buffer; i < nbytes; ++i, p += 2) { |
|
unsigned v, w, status; |
|
|
|
if (get_user(v, p) || get_user(w, p + 1)) |
|
return -EFAULT; |
|
switch (v) { |
|
case SSIN_UACPROC: |
|
w &= UAC_BITMASK; |
|
status = current_thread_info()->status; |
|
status = (status & ~UAC_BITMASK) | w; |
|
current_thread_info()->status = status; |
|
break; |
|
|
|
default: |
|
return -EOPNOTSUPP; |
|
} |
|
} |
|
return 0; |
|
} |
|
|
|
case SSI_LMF: |
|
return 0; |
|
|
|
default: |
|
break; |
|
} |
|
|
|
return -EOPNOTSUPP; |
|
} |
|
|
|
/* Translations due to the fact that OSF's time_t is an int. Which |
|
affects all sorts of things, like timeval and itimerval. */ |
|
|
|
extern struct timezone sys_tz; |
|
|
|
struct timeval32 |
|
{ |
|
int tv_sec, tv_usec; |
|
}; |
|
|
|
struct itimerval32 |
|
{ |
|
struct timeval32 it_interval; |
|
struct timeval32 it_value; |
|
}; |
|
|
|
static inline long |
|
get_tv32(struct timespec64 *o, struct timeval32 __user *i) |
|
{ |
|
struct timeval32 tv; |
|
if (copy_from_user(&tv, i, sizeof(struct timeval32))) |
|
return -EFAULT; |
|
o->tv_sec = tv.tv_sec; |
|
o->tv_nsec = tv.tv_usec * NSEC_PER_USEC; |
|
return 0; |
|
} |
|
|
|
static inline long |
|
put_tv32(struct timeval32 __user *o, struct timespec64 *i) |
|
{ |
|
return copy_to_user(o, &(struct timeval32){ |
|
.tv_sec = i->tv_sec, |
|
.tv_usec = i->tv_nsec / NSEC_PER_USEC}, |
|
sizeof(struct timeval32)); |
|
} |
|
|
|
static inline long |
|
put_tv_to_tv32(struct timeval32 __user *o, struct __kernel_old_timeval *i) |
|
{ |
|
return copy_to_user(o, &(struct timeval32){ |
|
.tv_sec = i->tv_sec, |
|
.tv_usec = i->tv_usec}, |
|
sizeof(struct timeval32)); |
|
} |
|
|
|
static inline void |
|
jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value) |
|
{ |
|
value->tv_usec = (jiffies % HZ) * (1000000L / HZ); |
|
value->tv_sec = jiffies / HZ; |
|
} |
|
|
|
SYSCALL_DEFINE2(osf_gettimeofday, struct timeval32 __user *, tv, |
|
struct timezone __user *, tz) |
|
{ |
|
if (tv) { |
|
struct timespec64 kts; |
|
|
|
ktime_get_real_ts64(&kts); |
|
if (put_tv32(tv, &kts)) |
|
return -EFAULT; |
|
} |
|
if (tz) { |
|
if (copy_to_user(tz, &sys_tz, sizeof(sys_tz))) |
|
return -EFAULT; |
|
} |
|
return 0; |
|
} |
|
|
|
SYSCALL_DEFINE2(osf_settimeofday, struct timeval32 __user *, tv, |
|
struct timezone __user *, tz) |
|
{ |
|
struct timespec64 kts; |
|
struct timezone ktz; |
|
|
|
if (tv) { |
|
if (get_tv32(&kts, tv)) |
|
return -EFAULT; |
|
} |
|
if (tz) { |
|
if (copy_from_user(&ktz, tz, sizeof(*tz))) |
|
return -EFAULT; |
|
} |
|
|
|
return do_sys_settimeofday64(tv ? &kts : NULL, tz ? &ktz : NULL); |
|
} |
|
|
|
asmlinkage long sys_ni_posix_timers(void); |
|
|
|
SYSCALL_DEFINE2(osf_utimes, const char __user *, filename, |
|
struct timeval32 __user *, tvs) |
|
{ |
|
struct timespec64 tv[2]; |
|
|
|
if (tvs) { |
|
if (get_tv32(&tv[0], &tvs[0]) || |
|
get_tv32(&tv[1], &tvs[1])) |
|
return -EFAULT; |
|
|
|
if (tv[0].tv_nsec < 0 || tv[0].tv_nsec >= 1000000000 || |
|
tv[1].tv_nsec < 0 || tv[1].tv_nsec >= 1000000000) |
|
return -EINVAL; |
|
} |
|
|
|
return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0); |
|
} |
|
|
|
SYSCALL_DEFINE5(osf_select, int, n, fd_set __user *, inp, fd_set __user *, outp, |
|
fd_set __user *, exp, struct timeval32 __user *, tvp) |
|
{ |
|
struct timespec64 end_time, *to = NULL; |
|
if (tvp) { |
|
struct timespec64 tv; |
|
to = &end_time; |
|
|
|
if (get_tv32(&tv, tvp)) |
|
return -EFAULT; |
|
|
|
if (tv.tv_sec < 0 || tv.tv_nsec < 0) |
|
return -EINVAL; |
|
|
|
if (poll_select_set_timeout(to, tv.tv_sec, tv.tv_nsec)) |
|
return -EINVAL; |
|
|
|
} |
|
|
|
/* OSF does not copy back the remaining time. */ |
|
return core_sys_select(n, inp, outp, exp, to); |
|
} |
|
|
|
struct rusage32 { |
|
struct timeval32 ru_utime; /* user time used */ |
|
struct timeval32 ru_stime; /* system time used */ |
|
long ru_maxrss; /* maximum resident set size */ |
|
long ru_ixrss; /* integral shared memory size */ |
|
long ru_idrss; /* integral unshared data size */ |
|
long ru_isrss; /* integral unshared stack size */ |
|
long ru_minflt; /* page reclaims */ |
|
long ru_majflt; /* page faults */ |
|
long ru_nswap; /* swaps */ |
|
long ru_inblock; /* block input operations */ |
|
long ru_oublock; /* block output operations */ |
|
long ru_msgsnd; /* messages sent */ |
|
long ru_msgrcv; /* messages received */ |
|
long ru_nsignals; /* signals received */ |
|
long ru_nvcsw; /* voluntary context switches */ |
|
long ru_nivcsw; /* involuntary " */ |
|
}; |
|
|
|
SYSCALL_DEFINE2(osf_getrusage, int, who, struct rusage32 __user *, ru) |
|
{ |
|
struct rusage32 r; |
|
u64 utime, stime; |
|
unsigned long utime_jiffies, stime_jiffies; |
|
|
|
if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN) |
|
return -EINVAL; |
|
|
|
memset(&r, 0, sizeof(r)); |
|
switch (who) { |
|
case RUSAGE_SELF: |
|
task_cputime(current, &utime, &stime); |
|
utime_jiffies = nsecs_to_jiffies(utime); |
|
stime_jiffies = nsecs_to_jiffies(stime); |
|
jiffies_to_timeval32(utime_jiffies, &r.ru_utime); |
|
jiffies_to_timeval32(stime_jiffies, &r.ru_stime); |
|
r.ru_minflt = current->min_flt; |
|
r.ru_majflt = current->maj_flt; |
|
break; |
|
case RUSAGE_CHILDREN: |
|
utime_jiffies = nsecs_to_jiffies(current->signal->cutime); |
|
stime_jiffies = nsecs_to_jiffies(current->signal->cstime); |
|
jiffies_to_timeval32(utime_jiffies, &r.ru_utime); |
|
jiffies_to_timeval32(stime_jiffies, &r.ru_stime); |
|
r.ru_minflt = current->signal->cmin_flt; |
|
r.ru_majflt = current->signal->cmaj_flt; |
|
break; |
|
} |
|
|
|
return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0; |
|
} |
|
|
|
SYSCALL_DEFINE4(osf_wait4, pid_t, pid, int __user *, ustatus, int, options, |
|
struct rusage32 __user *, ur) |
|
{ |
|
struct rusage r; |
|
long err = kernel_wait4(pid, ustatus, options, &r); |
|
if (err <= 0) |
|
return err; |
|
if (!ur) |
|
return err; |
|
if (put_tv_to_tv32(&ur->ru_utime, &r.ru_utime)) |
|
return -EFAULT; |
|
if (put_tv_to_tv32(&ur->ru_stime, &r.ru_stime)) |
|
return -EFAULT; |
|
if (copy_to_user(&ur->ru_maxrss, &r.ru_maxrss, |
|
sizeof(struct rusage32) - offsetof(struct rusage32, ru_maxrss))) |
|
return -EFAULT; |
|
return err; |
|
} |
|
|
|
/* |
|
* I don't know what the parameters are: the first one |
|
* seems to be a timeval pointer, and I suspect the second |
|
* one is the time remaining.. Ho humm.. No documentation. |
|
*/ |
|
SYSCALL_DEFINE2(osf_usleep_thread, struct timeval32 __user *, sleep, |
|
struct timeval32 __user *, remain) |
|
{ |
|
struct timespec64 tmp; |
|
unsigned long ticks; |
|
|
|
if (get_tv32(&tmp, sleep)) |
|
goto fault; |
|
|
|
ticks = timespec64_to_jiffies(&tmp); |
|
|
|
ticks = schedule_timeout_interruptible(ticks); |
|
|
|
if (remain) { |
|
jiffies_to_timespec64(ticks, &tmp); |
|
if (put_tv32(remain, &tmp)) |
|
goto fault; |
|
} |
|
|
|
return 0; |
|
fault: |
|
return -EFAULT; |
|
} |
|
|
|
|
|
struct timex32 { |
|
unsigned int modes; /* mode selector */ |
|
long offset; /* time offset (usec) */ |
|
long freq; /* frequency offset (scaled ppm) */ |
|
long maxerror; /* maximum error (usec) */ |
|
long esterror; /* estimated error (usec) */ |
|
int status; /* clock command/status */ |
|
long constant; /* pll time constant */ |
|
long precision; /* clock precision (usec) (read only) */ |
|
long tolerance; /* clock frequency tolerance (ppm) |
|
* (read only) |
|
*/ |
|
struct timeval32 time; /* (read only) */ |
|
long tick; /* (modified) usecs between clock ticks */ |
|
|
|
long ppsfreq; /* pps frequency (scaled ppm) (ro) */ |
|
long jitter; /* pps jitter (us) (ro) */ |
|
int shift; /* interval duration (s) (shift) (ro) */ |
|
long stabil; /* pps stability (scaled ppm) (ro) */ |
|
long jitcnt; /* jitter limit exceeded (ro) */ |
|
long calcnt; /* calibration intervals (ro) */ |
|
long errcnt; /* calibration errors (ro) */ |
|
long stbcnt; /* stability limit exceeded (ro) */ |
|
|
|
int :32; int :32; int :32; int :32; |
|
int :32; int :32; int :32; int :32; |
|
int :32; int :32; int :32; int :32; |
|
}; |
|
|
|
SYSCALL_DEFINE1(old_adjtimex, struct timex32 __user *, txc_p) |
|
{ |
|
struct __kernel_timex txc; |
|
int ret; |
|
|
|
/* copy relevant bits of struct timex. */ |
|
if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) || |
|
copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) - |
|
offsetof(struct timex32, tick))) |
|
return -EFAULT; |
|
|
|
ret = do_adjtimex(&txc); |
|
if (ret < 0) |
|
return ret; |
|
|
|
/* copy back to timex32 */ |
|
if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) || |
|
(copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) - |
|
offsetof(struct timex32, tick))) || |
|
(put_user(txc.time.tv_sec, &txc_p->time.tv_sec)) || |
|
(put_user(txc.time.tv_usec, &txc_p->time.tv_usec))) |
|
return -EFAULT; |
|
|
|
return ret; |
|
} |
|
|
|
/* Get an address range which is currently unmapped. Similar to the |
|
generic version except that we know how to honor ADDR_LIMIT_32BIT. */ |
|
|
|
static unsigned long |
|
arch_get_unmapped_area_1(unsigned long addr, unsigned long len, |
|
unsigned long limit) |
|
{ |
|
struct vm_unmapped_area_info info; |
|
|
|
info.flags = 0; |
|
info.length = len; |
|
info.low_limit = addr; |
|
info.high_limit = limit; |
|
info.align_mask = 0; |
|
info.align_offset = 0; |
|
return vm_unmapped_area(&info); |
|
} |
|
|
|
unsigned long |
|
arch_get_unmapped_area(struct file *filp, unsigned long addr, |
|
unsigned long len, unsigned long pgoff, |
|
unsigned long flags) |
|
{ |
|
unsigned long limit; |
|
|
|
/* "32 bit" actually means 31 bit, since pointers sign extend. */ |
|
if (current->personality & ADDR_LIMIT_32BIT) |
|
limit = 0x80000000; |
|
else |
|
limit = TASK_SIZE; |
|
|
|
if (len > limit) |
|
return -ENOMEM; |
|
|
|
if (flags & MAP_FIXED) |
|
return addr; |
|
|
|
/* First, see if the given suggestion fits. |
|
|
|
The OSF/1 loader (/sbin/loader) relies on us returning an |
|
address larger than the requested if one exists, which is |
|
a terribly broken way to program. |
|
|
|
That said, I can see the use in being able to suggest not |
|
merely specific addresses, but regions of memory -- perhaps |
|
this feature should be incorporated into all ports? */ |
|
|
|
if (addr) { |
|
addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit); |
|
if (addr != (unsigned long) -ENOMEM) |
|
return addr; |
|
} |
|
|
|
/* Next, try allocating at TASK_UNMAPPED_BASE. */ |
|
addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE), |
|
len, limit); |
|
if (addr != (unsigned long) -ENOMEM) |
|
return addr; |
|
|
|
/* Finally, try allocating in low memory. */ |
|
addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit); |
|
|
|
return addr; |
|
} |
|
|
|
#ifdef CONFIG_OSF4_COMPAT |
|
/* Clear top 32 bits of iov_len in the user's buffer for |
|
compatibility with old versions of OSF/1 where iov_len |
|
was defined as int. */ |
|
static int |
|
osf_fix_iov_len(const struct iovec __user *iov, unsigned long count) |
|
{ |
|
unsigned long i; |
|
|
|
for (i = 0 ; i < count ; i++) { |
|
int __user *iov_len_high = (int __user *)&iov[i].iov_len + 1; |
|
|
|
if (put_user(0, iov_len_high)) |
|
return -EFAULT; |
|
} |
|
return 0; |
|
} |
|
#endif |
|
|
|
SYSCALL_DEFINE3(osf_readv, unsigned long, fd, |
|
const struct iovec __user *, vector, unsigned long, count) |
|
{ |
|
#ifdef CONFIG_OSF4_COMPAT |
|
if (unlikely(personality(current->personality) == PER_OSF4)) |
|
if (osf_fix_iov_len(vector, count)) |
|
return -EFAULT; |
|
#endif |
|
|
|
return sys_readv(fd, vector, count); |
|
} |
|
|
|
SYSCALL_DEFINE3(osf_writev, unsigned long, fd, |
|
const struct iovec __user *, vector, unsigned long, count) |
|
{ |
|
#ifdef CONFIG_OSF4_COMPAT |
|
if (unlikely(personality(current->personality) == PER_OSF4)) |
|
if (osf_fix_iov_len(vector, count)) |
|
return -EFAULT; |
|
#endif |
|
return sys_writev(fd, vector, count); |
|
} |
|
|
|
SYSCALL_DEFINE2(osf_getpriority, int, which, int, who) |
|
{ |
|
int prio = sys_getpriority(which, who); |
|
if (prio >= 0) { |
|
/* Return value is the unbiased priority, i.e. 20 - prio. |
|
This does result in negative return values, so signal |
|
no error */ |
|
force_successful_syscall_return(); |
|
prio = 20 - prio; |
|
} |
|
return prio; |
|
} |
|
|
|
SYSCALL_DEFINE0(getxuid) |
|
{ |
|
current_pt_regs()->r20 = sys_geteuid(); |
|
return sys_getuid(); |
|
} |
|
|
|
SYSCALL_DEFINE0(getxgid) |
|
{ |
|
current_pt_regs()->r20 = sys_getegid(); |
|
return sys_getgid(); |
|
} |
|
|
|
SYSCALL_DEFINE0(getxpid) |
|
{ |
|
current_pt_regs()->r20 = sys_getppid(); |
|
return sys_getpid(); |
|
} |
|
|
|
SYSCALL_DEFINE0(alpha_pipe) |
|
{ |
|
int fd[2]; |
|
int res = do_pipe_flags(fd, 0); |
|
if (!res) { |
|
/* The return values are in $0 and $20. */ |
|
current_pt_regs()->r20 = fd[1]; |
|
res = fd[0]; |
|
} |
|
return res; |
|
} |
|
|
|
SYSCALL_DEFINE1(sethae, unsigned long, val) |
|
{ |
|
current_pt_regs()->hae = val; |
|
return 0; |
|
}
|
|
|