davidlt/kernel-ark
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity
8d79d088e8
kernel-ark/arch/sparc64/solaris/fs.c
David Howells 726c334223 [PATCH] VFS: Permit filesystem to perform statfs with a known root dentry 
Give the statfs superblock operation a dentry pointer rather than a superblock
pointer.

This complements the get_sb() patch.  That reduced the significance of
sb->s_root, allowing NFS to place a fake root there.  However, NFS does
require a dentry to use as a target for the statfs operation.  This permits
the root in the vfsmount to be used instead.

linux/mount.h has been added where necessary to make allyesconfig build
successfully.

Interest has also been expressed for use with the FUSE and XFS filesystems.

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Cc: Nathan Scott <nathans@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-23 07:42:45 -07:00

741 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)
{
if (kbuf->size > MAX_NON_LFS ||
!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;
}
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