lisa/android_kernel_xiaomi_sm8350
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
4f51dc5e9a
android_kernel_xiaomi_sm8350/arch/sparc64/solaris/fs.c
David Howells afefdbb28a [PATCH] VFS: Make filldir_t and struct kstat deal in 64-bit inode numbers 
These patches make the kernel pass 64-bit inode numbers internally when
communicating to userspace, even on a 32-bit system.  They are required
because some filesystems have intrinsic 64-bit inode numbers: NFS3+ and XFS
for example.  The 64-bit inode numbers are then propagated to userspace
automatically where the arch supports it.

Problems have been seen with userspace (eg: ld.so) using the 64-bit inode
number returned by stat64() or getdents64() to differentiate files, and
failing because the 64-bit inode number space was compressed to 32-bits, and
so overlaps occur.

This patch:

Make filldir_t take a 64-bit inode number and struct kstat carry a 64-bit
inode number so that 64-bit inode numbers can be passed back to userspace.

The stat functions then returns the full 64-bit inode number where
available and where possible.  If it is not possible to represent the inode
number supplied by the filesystem in the field provided by userspace, then
error EOVERFLOW will be issued.

Similarly, the getdents/readdir functions now pass the full 64-bit inode
number to userspace where possible, returning EOVERFLOW instead when a
directory entry is encountered that can't be properly represented.

Note that this means that some inodes will not be stat'able on a 32-bit
system with old libraries where they were before - but it does mean that
there will be no ambiguity over what a 32-bit inode number refers to.

Note similarly that directory scans may be cut short with an error on a
32-bit system with old libraries where the scan would work before for the
same reasons.

It is judged unlikely that this situation will occur because modern glibc
uses 64-bit capable versions of stat and getdents class functions
exclusively, and that older systems are unlikely to encounter
unrepresentable inode numbers anyway.

[akpm: alpha build fix]
Signed-off-by: David Howells <dhowells@redhat.com>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-10-03 08:03:40 -07:00

746 lines
19 KiB
C
Raw Blame History

/* $Id: fs.c,v 1.27 2002/02/08 03:57:14 davem Exp $
* fs.c: fs related syscall emulation for Solaris
*
* Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
*
* 1999-08-19 Implemented solaris F_FREESP (truncate)
* fcntl, by Jason Rappleye (rappleye@ccr.buffalo.edu)
*/
#include <linux/types.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/capability.h>
#include <linux/fs.h>
#include <linux/namei.h>
#include <linux/mm.h>
#include <linux/file.h>
#include <linux/stat.h>
#include <linux/smp_lock.h>
#include <linux/limits.h>
#include <linux/resource.h>
#include <linux/quotaops.h>
#include <linux/mount.h>
#include <linux/vfs.h>
#include <asm/uaccess.h>
#include <asm/string.h>
#include <asm/ptrace.h>
#include "conv.h"
#define R3_VERSION 1
#define R4_VERSION 2
typedef struct {
s32 tv_sec;
s32 tv_nsec;
} timestruct_t;
struct sol_stat {
u32 st_dev;
s32 st_pad1[3]; /* network id */
u32 st_ino;
u32 st_mode;
u32 st_nlink;
u32 st_uid;
u32 st_gid;
u32 st_rdev;
s32 st_pad2[2];
s32 st_size;
s32 st_pad3; /* st_size, off_t expansion */
timestruct_t st_atime;
timestruct_t st_mtime;
timestruct_t st_ctime;
s32 st_blksize;
s32 st_blocks;
char st_fstype[16];
s32 st_pad4[8]; /* expansion area */
};
struct sol_stat64 {
u32 st_dev;
s32 st_pad1[3]; /* network id */
u64 st_ino;
u32 st_mode;
u32 st_nlink;
u32 st_uid;
u32 st_gid;
u32 st_rdev;
s32 st_pad2[2];
s64 st_size;
timestruct_t st_atime;
timestruct_t st_mtime;
timestruct_t st_ctime;
s64 st_blksize;
s32 st_blocks;
char st_fstype[16];
s32 st_pad4[4]; /* expansion area */
};
#define UFSMAGIC (((unsigned)'u'<<24)||((unsigned)'f'<<16)||((unsigned)'s'<<8))
static inline int putstat(struct sol_stat __user *ubuf, struct kstat *kbuf)
{
u32 ino;
if (kbuf->size > MAX_NON_LFS ||
!sysv_valid_dev(kbuf->dev) ||
!sysv_valid_dev(kbuf->rdev))
return -EOVERFLOW;
ino = kbuf->ino;
if (sizeof(ino) < sizeof(kbuf->ino) && ino != kbuf->ino)
return -EOVERFLOW;
if (put_user (sysv_encode_dev(kbuf->dev), &ubuf->st_dev) ||
__put_user (ino, &ubuf->st_ino) ||
__put_user (kbuf->mode, &ubuf->st_mode) ||
__put_user (kbuf->nlink, &ubuf->st_nlink) ||
__put_user (kbuf->uid, &ubuf->st_uid) ||
__put_user (kbuf->gid, &ubuf->st_gid) ||
__put_user (sysv_encode_dev(kbuf->rdev), &ubuf->st_rdev) ||
__put_user (kbuf->size, &ubuf->st_size) ||
__put_user (kbuf->atime.tv_sec, &ubuf->st_atime.tv_sec) ||
__put_user (kbuf->atime.tv_nsec, &ubuf->st_atime.tv_nsec) ||
__put_user (kbuf->mtime.tv_sec, &ubuf->st_mtime.tv_sec) ||
__put_user (kbuf->mtime.tv_nsec, &ubuf->st_mtime.tv_nsec) ||
__put_user (kbuf->ctime.tv_sec, &ubuf->st_ctime.tv_sec) ||
__put_user (kbuf->ctime.tv_nsec, &ubuf->st_ctime.tv_nsec) ||
__put_user (kbuf->blksize, &ubuf->st_blksize) ||
__put_user (kbuf->blocks, &ubuf->st_blocks) ||
__put_user (UFSMAGIC, (unsigned __user *)ubuf->st_fstype))
return -EFAULT;
return 0;
}
static inline int putstat64(struct sol_stat64 __user *ubuf, struct kstat *kbuf)
{
if (!sysv_valid_dev(kbuf->dev) || !sysv_valid_dev(kbuf->rdev))
return -EOVERFLOW;
if (put_user (sysv_encode_dev(kbuf->dev), &ubuf->st_dev) ||
__put_user (kbuf->ino, &ubuf->st_ino) ||
__put_user (kbuf->mode, &ubuf->st_mode) ||
__put_user (kbuf->nlink, &ubuf->st_nlink) ||
__put_user (kbuf->uid, &ubuf->st_uid) ||
__put_user (kbuf->gid, &ubuf->st_gid) ||
__put_user (sysv_encode_dev(kbuf->rdev), &ubuf->st_rdev) ||
__put_user (kbuf->size, &ubuf->st_size) ||
__put_user (kbuf->atime.tv_sec, &ubuf->st_atime.tv_sec) ||
__put_user (kbuf->atime.tv_nsec, &ubuf->st_atime.tv_nsec) ||
__put_user (kbuf->mtime.tv_sec, &ubuf->st_mtime.tv_sec) ||
__put_user (kbuf->mtime.tv_nsec, &ubuf->st_mtime.tv_nsec) ||
__put_user (kbuf->ctime.tv_sec, &ubuf->st_ctime.tv_sec) ||
__put_user (kbuf->ctime.tv_nsec, &ubuf->st_ctime.tv_nsec) ||
__put_user (kbuf->blksize, &ubuf->st_blksize) ||
__put_user (kbuf->blocks, &ubuf->st_blocks) ||
__put_user (UFSMAGIC, (unsigned __user *)ubuf->st_fstype))
return -EFAULT;
return 0;
}
asmlinkage int solaris_stat(u32 filename, u32 statbuf)
{
struct kstat s;
int ret = vfs_stat(A(filename), &s);
if (!ret)
return putstat(A(statbuf), &s);
return ret;
}
asmlinkage int solaris_xstat(int vers, u32 filename, u32 statbuf)
{
/* Solaris doesn't bother with looking at vers, so we do neither */
return solaris_stat(filename, statbuf);
}
asmlinkage int solaris_stat64(u32 filename, u32 statbuf)
{
struct kstat s;
int ret = vfs_stat(A(filename), &s);
if (!ret)
return putstat64(A(statbuf), &s);
return ret;
}
asmlinkage int solaris_lstat(u32 filename, u32 statbuf)
{
struct kstat s;
int ret = vfs_lstat(A(filename), &s);
if (!ret)
return putstat(A(statbuf), &s);
return ret;
}
asmlinkage int solaris_lxstat(int vers, u32 filename, u32 statbuf)
{
return solaris_lstat(filename, statbuf);
}
asmlinkage int solaris_lstat64(u32 filename, u32 statbuf)
{
struct kstat s;
int ret = vfs_lstat(A(filename), &s);
if (!ret)
return putstat64(A(statbuf), &s);
return ret;
}
asmlinkage int solaris_fstat(unsigned int fd, u32 statbuf)
{
struct kstat s;
int ret = vfs_fstat(fd, &s);
if (!ret)
return putstat(A(statbuf), &s);
return ret;
}
asmlinkage int solaris_fxstat(int vers, u32 fd, u32 statbuf)
{
return solaris_fstat(fd, statbuf);
}
asmlinkage int solaris_fstat64(unsigned int fd, u32 statbuf)
{
struct kstat s;
int ret = vfs_fstat(fd, &s);
if (!ret)
return putstat64(A(statbuf), &s);
return ret;
}
asmlinkage int solaris_mknod(u32 path, u32 mode, s32 dev)
{
int (*sys_mknod)(const char __user *,int,unsigned) =
(int (*)(const char __user *,int,unsigned))SYS(mknod);
int major = sysv_major(dev);
int minor = sysv_minor(dev);
/* minor is guaranteed to be OK for MKDEV, major might be not */
if (major > 0xfff)
return -EINVAL;
return sys_mknod(A(path), mode, new_encode_dev(MKDEV(major,minor)));
}
asmlinkage int solaris_xmknod(int vers, u32 path, u32 mode, s32 dev)
{
return solaris_mknod(path, mode, dev);
}
asmlinkage int solaris_getdents64(unsigned int fd, void __user *dirent, unsigned int count)
{
int (*sys_getdents)(unsigned int, void __user *, unsigned int) =
(int (*)(unsigned int, void __user *, unsigned int))SYS(getdents);
return sys_getdents(fd, dirent, count);
}
/* This statfs thingie probably will go in the near future, but... */
struct sol_statfs {
short f_type;
s32 f_bsize;
s32 f_frsize;
s32 f_blocks;
s32 f_bfree;
u32 f_files;
u32 f_ffree;
char f_fname[6];
char f_fpack[6];
};
asmlinkage int solaris_statfs(u32 path, u32 buf, int len, int fstype)
{
int ret;
struct statfs s;
mm_segment_t old_fs = get_fs();
int (*sys_statfs)(const char __user *,struct statfs __user *) =
(int (*)(const char __user *,struct statfs __user *))SYS(statfs);
struct sol_statfs __user *ss = A(buf);
if (len != sizeof(struct sol_statfs)) return -EINVAL;
if (!fstype) {
/* FIXME: mixing userland and kernel pointers */
set_fs (KERNEL_DS);
ret = sys_statfs(A(path), &s);
set_fs (old_fs);
if (!ret) {
if (put_user (s.f_type, &ss->f_type) ||
__put_user (s.f_bsize, &ss->f_bsize) ||
__put_user (0, &ss->f_frsize) ||
__put_user (s.f_blocks, &ss->f_blocks) ||
__put_user (s.f_bfree, &ss->f_bfree) ||
__put_user (s.f_files, &ss->f_files) ||
__put_user (s.f_ffree, &ss->f_ffree) ||
__clear_user (&ss->f_fname, 12))
return -EFAULT;
}
return ret;
}
/* Linux can't stat unmounted filesystems so we
* simply lie and claim 100MB of 1GB is free. Sorry.
*/
if (put_user (fstype, &ss->f_type) ||
__put_user (1024, &ss->f_bsize) ||
__put_user (0, &ss->f_frsize) ||
__put_user (1024*1024, &ss->f_blocks) ||
__put_user (100*1024, &ss->f_bfree) ||
__put_user (60000, &ss->f_files) ||
__put_user (50000, &ss->f_ffree) ||
__clear_user (&ss->f_fname, 12))
return -EFAULT;
return 0;
}
asmlinkage int solaris_fstatfs(u32 fd, u32 buf, int len, int fstype)
{
int ret;
struct statfs s;
mm_segment_t old_fs = get_fs();
int (*sys_fstatfs)(unsigned,struct statfs __user *) =
(int (*)(unsigned,struct statfs __user *))SYS(fstatfs);
struct sol_statfs __user *ss = A(buf);
if (len != sizeof(struct sol_statfs)) return -EINVAL;
if (!fstype) {
set_fs (KERNEL_DS);
ret = sys_fstatfs(fd, &s);
set_fs (old_fs);
if (!ret) {
if (put_user (s.f_type, &ss->f_type) ||
__put_user (s.f_bsize, &ss->f_bsize) ||
__put_user (0, &ss->f_frsize) ||
__put_user (s.f_blocks, &ss->f_blocks) ||
__put_user (s.f_bfree, &ss->f_bfree) ||
__put_user (s.f_files, &ss->f_files) ||
__put_user (s.f_ffree, &ss->f_ffree) ||
__clear_user (&ss->f_fname, 12))
return -EFAULT;
}
return ret;
}
/* Otherwise fstatfs is the same as statfs */
return solaris_statfs(0, buf, len, fstype);
}
struct sol_statvfs {
u32 f_bsize;
u32 f_frsize;
u32 f_blocks;
u32 f_bfree;
u32 f_bavail;
u32 f_files;
u32 f_ffree;
u32 f_favail;
u32 f_fsid;
char f_basetype[16];
u32 f_flag;
u32 f_namemax;
char f_fstr[32];
u32 f_filler[16];
};
struct sol_statvfs64 {
u32 f_bsize;
u32 f_frsize;
u64 f_blocks;
u64 f_bfree;
u64 f_bavail;
u64 f_files;
u64 f_ffree;
u64 f_favail;
u32 f_fsid;
char f_basetype[16];
u32 f_flag;
u32 f_namemax;
char f_fstr[32];
u32 f_filler[16];
};
static int report_statvfs(struct vfsmount *mnt, struct inode *inode, u32 buf)
{
struct kstatfs s;
int error;
struct sol_statvfs __user *ss = A(buf);
error = vfs_statfs(mnt->mnt_root, &s);
if (!error) {
const char *p = mnt->mnt_sb->s_type->name;
int i = 0;
int j = strlen (p);
if (j > 15) j = 15;
if (IS_RDONLY(inode)) i = 1;
if (mnt->mnt_flags & MNT_NOSUID) i |= 2;
if (!sysv_valid_dev(inode->i_sb->s_dev))
return -EOVERFLOW;
if (put_user (s.f_bsize, &ss->f_bsize) ||
__put_user (0, &ss->f_frsize) ||
__put_user (s.f_blocks, &ss->f_blocks) ||
__put_user (s.f_bfree, &ss->f_bfree) ||
__put_user (s.f_bavail, &ss->f_bavail) ||
__put_user (s.f_files, &ss->f_files) ||
__put_user (s.f_ffree, &ss->f_ffree) ||
__put_user (s.f_ffree, &ss->f_favail) ||
__put_user (sysv_encode_dev(inode->i_sb->s_dev), &ss->f_fsid) ||
__copy_to_user (ss->f_basetype,p,j) ||
__put_user (0, (char __user *)&ss->f_basetype[j]) ||
__put_user (s.f_namelen, &ss->f_namemax) ||
__put_user (i, &ss->f_flag) ||
__clear_user (&ss->f_fstr, 32))
return -EFAULT;
}
return error;
}
static int report_statvfs64(struct vfsmount *mnt, struct inode *inode, u32 buf)
{
struct kstatfs s;
int error;
struct sol_statvfs64 __user *ss = A(buf);
error = vfs_statfs(mnt->mnt_root, &s);
if (!error) {
const char *p = mnt->mnt_sb->s_type->name;
int i = 0;
int j = strlen (p);
if (j > 15) j = 15;
if (IS_RDONLY(inode)) i = 1;
if (mnt->mnt_flags & MNT_NOSUID) i |= 2;
if (!sysv_valid_dev(inode->i_sb->s_dev))
return -EOVERFLOW;
if (put_user (s.f_bsize, &ss->f_bsize) ||
__put_user (0, &ss->f_frsize) ||
__put_user (s.f_blocks, &ss->f_blocks) ||
__put_user (s.f_bfree, &ss->f_bfree) ||
__put_user (s.f_bavail, &ss->f_bavail) ||
__put_user (s.f_files, &ss->f_files) ||
__put_user (s.f_ffree, &ss->f_ffree) ||
__put_user (s.f_ffree, &ss->f_favail) ||
__put_user (sysv_encode_dev(inode->i_sb->s_dev), &ss->f_fsid) ||
__copy_to_user (ss->f_basetype,p,j) ||
__put_user (0, (char __user *)&ss->f_basetype[j]) ||
__put_user (s.f_namelen, &ss->f_namemax) ||
__put_user (i, &ss->f_flag) ||
__clear_user (&ss->f_fstr, 32))
return -EFAULT;
}
return error;
}
asmlinkage int solaris_statvfs(u32 path, u32 buf)
{
struct nameidata nd;
int error;
error = user_path_walk(A(path),&nd);
if (!error) {
struct inode * inode = nd.dentry->d_inode;
error = report_statvfs(nd.mnt, inode, buf);
path_release(&nd);
}
return error;
}
asmlinkage int solaris_fstatvfs(unsigned int fd, u32 buf)
{
struct file * file;
int error;
error = -EBADF;
file = fget(fd);
if (file) {
error = report_statvfs(file->f_vfsmnt, file->f_dentry->d_inode, buf);
fput(file);
}
return error;
}
asmlinkage int solaris_statvfs64(u32 path, u32 buf)
{
struct nameidata nd;
int error;
lock_kernel();
error = user_path_walk(A(path), &nd);
if (!error) {
struct inode * inode = nd.dentry->d_inode;
error = report_statvfs64(nd.mnt, inode, buf);
path_release(&nd);
}
unlock_kernel();
return error;
}
asmlinkage int solaris_fstatvfs64(unsigned int fd, u32 buf)
{
struct file * file;
int error;
error = -EBADF;
file = fget(fd);
if (file) {
lock_kernel();
error = report_statvfs64(file->f_vfsmnt, file->f_dentry->d_inode, buf);
unlock_kernel();
fput(file);
}
return error;
}
extern asmlinkage long sparc32_open(const char * filename, int flags, int mode);
asmlinkage int solaris_open(u32 fname, int flags, u32 mode)
{
const char *filename = (const char *)(long)fname;
int fl = flags & 0xf;
/* Translate flags first. */
if (flags & 0x2000) fl |= O_LARGEFILE;
if (flags & 0x8050) fl |= O_SYNC;
if (flags & 0x80) fl |= O_NONBLOCK;
if (flags & 0x100) fl |= O_CREAT;
if (flags & 0x200) fl |= O_TRUNC;
if (flags & 0x400) fl |= O_EXCL;
if (flags & 0x800) fl |= O_NOCTTY;
flags = fl;
return sparc32_open(filename, flags, mode);
}
#define SOL_F_SETLK 6
#define SOL_F_SETLKW 7
#define SOL_F_FREESP 11
#define SOL_F_ISSTREAM 13
#define SOL_F_GETLK 14
#define SOL_F_PRIV 15
#define SOL_F_NPRIV 16
#define SOL_F_QUOTACTL 17
#define SOL_F_BLOCKS 18
#define SOL_F_BLKSIZE 19
#define SOL_F_GETOWN 23
#define SOL_F_SETOWN 24
struct sol_flock {
short l_type;
short l_whence;
u32 l_start;
u32 l_len;
s32 l_sysid;
s32 l_pid;
s32 l_pad[4];
};
asmlinkage int solaris_fcntl(unsigned fd, unsigned cmd, u32 arg)
{
int (*sys_fcntl)(unsigned,unsigned,unsigned long) =
(int (*)(unsigned,unsigned,unsigned long))SYS(fcntl);
int ret, flags;
switch (cmd) {
case F_DUPFD:
case F_GETFD:
case F_SETFD: return sys_fcntl(fd, cmd, (unsigned long)arg);
case F_GETFL:
flags = sys_fcntl(fd, cmd, 0);
ret = flags & 0xf;
if (flags & O_SYNC) ret |= 0x8050;
if (flags & O_NONBLOCK) ret |= 0x80;
return ret;
case F_SETFL:
flags = arg & 0xf;
if (arg & 0x8050) flags |= O_SYNC;
if (arg & 0x80) flags |= O_NONBLOCK;
return sys_fcntl(fd, cmd, (long)flags);
case SOL_F_GETLK:
case SOL_F_SETLK:
case SOL_F_SETLKW:
{
struct flock f;
struct sol_flock __user *p = A(arg);
mm_segment_t old_fs = get_fs();
switch (cmd) {
case SOL_F_GETLK: cmd = F_GETLK; break;
case SOL_F_SETLK: cmd = F_SETLK; break;
case SOL_F_SETLKW: cmd = F_SETLKW; break;
}
if (get_user (f.l_type, &p->l_type) ||
__get_user (f.l_whence, &p->l_whence) ||
__get_user (f.l_start, &p->l_start) ||
__get_user (f.l_len, &p->l_len) ||
__get_user (f.l_pid, &p->l_sysid))
return -EFAULT;
set_fs(KERNEL_DS);
ret = sys_fcntl(fd, cmd, (unsigned long)&f);
set_fs(old_fs);
if (__put_user (f.l_type, &p->l_type) ||
__put_user (f.l_whence, &p->l_whence) ||
__put_user (f.l_start, &p->l_start) ||
__put_user (f.l_len, &p->l_len) ||
__put_user (f.l_pid, &p->l_pid) ||
__put_user (0, &p->l_sysid))
return -EFAULT;
return ret;
}
case SOL_F_FREESP:
{
int length;
int (*sys_newftruncate)(unsigned int, unsigned long)=
(int (*)(unsigned int, unsigned long))SYS(ftruncate);
if (get_user(length, &((struct sol_flock __user *)A(arg))->l_start))
return -EFAULT;
return sys_newftruncate(fd, length);
}
};
return -EINVAL;
}
asmlinkage int solaris_ulimit(int cmd, int val)
{
switch (cmd) {
case 1: /* UL_GETFSIZE - in 512B chunks */
return current->signal->rlim[RLIMIT_FSIZE].rlim_cur >> 9;
case 2: /* UL_SETFSIZE */
if ((unsigned long)val > (LONG_MAX>>9)) return -ERANGE;
val <<= 9;
task_lock(current->group_leader);
if (val > current->signal->rlim[RLIMIT_FSIZE].rlim_max) {
if (!capable(CAP_SYS_RESOURCE)) {
task_unlock(current->group_leader);
return -EPERM;
}
current->signal->rlim[RLIMIT_FSIZE].rlim_max = val;
}
current->signal->rlim[RLIMIT_FSIZE].rlim_cur = val;
task_unlock(current->group_leader);
return 0;
case 3: /* UL_GMEMLIM */
return current->signal->rlim[RLIMIT_DATA].rlim_cur;
case 4: /* UL_GDESLIM */
return NR_OPEN;
}
return -EINVAL;
}
/* At least at the time I'm writing this, Linux doesn't have ACLs, so we
just fake this */
asmlinkage int solaris_acl(u32 filename, int cmd, int nentries, u32 aclbufp)
{
return -ENOSYS;
}
asmlinkage int solaris_facl(unsigned int fd, int cmd, int nentries, u32 aclbufp)
{
return -ENOSYS;
}
asmlinkage int solaris_pread(unsigned int fd, char __user *buf, u32 count, u32 pos)
{
ssize_t (*sys_pread64)(unsigned int, char __user *, size_t, loff_t) =
(ssize_t (*)(unsigned int, char __user *, size_t, loff_t))SYS(pread64);
return sys_pread64(fd, buf, count, (loff_t)pos);
}
asmlinkage int solaris_pwrite(unsigned int fd, char __user *buf, u32 count, u32 pos)
{
ssize_t (*sys_pwrite64)(unsigned int, char __user *, size_t, loff_t) =
(ssize_t (*)(unsigned int, char __user *, size_t, loff_t))SYS(pwrite64);
return sys_pwrite64(fd, buf, count, (loff_t)pos);
}
/* POSIX.1 names */
#define _PC_LINK_MAX 1
#define _PC_MAX_CANON 2
#define _PC_MAX_INPUT 3
#define _PC_NAME_MAX 4
#define _PC_PATH_MAX 5
#define _PC_PIPE_BUF 6
#define _PC_NO_TRUNC 7
#define _PC_VDISABLE 8
#define _PC_CHOWN_RESTRICTED 9
/* POSIX.4 names */
#define _PC_ASYNC_IO 10
#define _PC_PRIO_IO 11
#define _PC_SYNC_IO 12
#define _PC_LAST 12
/* This is not a real and complete implementation yet, just to keep
* the easy Solaris binaries happy.
*/
asmlinkage int solaris_fpathconf(int fd, int name)
{
int ret;
switch(name) {
case _PC_LINK_MAX:
ret = LINK_MAX;
break;
case _PC_MAX_CANON:
ret = MAX_CANON;
break;
case _PC_MAX_INPUT:
ret = MAX_INPUT;
break;
case _PC_NAME_MAX:
ret = NAME_MAX;
break;
case _PC_PATH_MAX:
ret = PATH_MAX;
break;
case _PC_PIPE_BUF:
ret = PIPE_BUF;
break;
case _PC_CHOWN_RESTRICTED:
ret = 1;
break;
case _PC_NO_TRUNC:
case _PC_VDISABLE:
ret = 0;
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
asmlinkage int solaris_pathconf(u32 path, int name)
{
return solaris_fpathconf(0, name);
}
/* solaris_llseek returns long long - quite difficult */
asmlinkage long solaris_llseek(struct pt_regs *regs, u32 off_hi, u32 off_lo, int whence)
{
int (*sys_llseek)(unsigned int, unsigned long, unsigned long, loff_t __user *, unsigned int) =
(int (*)(unsigned int, unsigned long, unsigned long, loff_t __user *, unsigned int))SYS(_llseek);
int ret;
mm_segment_t old_fs = get_fs();
loff_t retval;
set_fs(KERNEL_DS);
ret = sys_llseek((unsigned int)regs->u_regs[UREG_I0], off_hi, off_lo, &retval, whence);
set_fs(old_fs);
if (ret < 0) return ret;
regs->u_regs[UREG_I1] = (u32)retval;
return (retval >> 32);
}
/* Have to mask out all but lower 3 bits */
asmlinkage int solaris_access(u32 filename, long mode)
{
int (*sys_access)(const char __user *, int) =
(int (*)(const char __user *, int))SYS(access);
return sys_access(A(filename), mode & 7);
}
Reference in New Issue View Git Blame Copy Permalink