linux/arch/sparc64/solaris/fs.c
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   1/* $Id: fs.c,v 1.27 2002/02/08 03:57:14 davem Exp $
   2 * fs.c: fs related syscall emulation for Solaris
   3 *
   4 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
   5 *
   6 * 1999-08-19 Implemented solaris F_FREESP (truncate)
   7 *            fcntl, by Jason Rappleye (rappleye@ccr.buffalo.edu)
   8 */
   9
  10#include <linux/types.h>
  11#include <linux/sched.h>
  12#include <linux/slab.h>
  13#include <linux/capability.h>
  14#include <linux/fs.h>
  15#include <linux/namei.h>
  16#include <linux/mm.h>
  17#include <linux/file.h>
  18#include <linux/stat.h>
  19#include <linux/smp_lock.h>
  20#include <linux/limits.h>
  21#include <linux/resource.h>
  22#include <linux/quotaops.h>
  23#include <linux/mount.h>
  24#include <linux/vfs.h>
  25
  26#include <asm/uaccess.h>
  27#include <asm/string.h>
  28#include <asm/ptrace.h>
  29
  30#include "conv.h"
  31
  32#define R3_VERSION      1
  33#define R4_VERSION      2
  34
  35typedef struct {
  36        s32     tv_sec;
  37        s32     tv_nsec;
  38} timestruct_t;
  39
  40struct sol_stat {
  41        u32             st_dev;
  42        s32             st_pad1[3];     /* network id */
  43        u32             st_ino;
  44        u32             st_mode;
  45        u32             st_nlink;
  46        u32             st_uid;
  47        u32             st_gid;
  48        u32             st_rdev;
  49        s32             st_pad2[2];
  50        s32             st_size;
  51        s32             st_pad3;        /* st_size, off_t expansion */
  52        timestruct_t    st_atime;
  53        timestruct_t    st_mtime;
  54        timestruct_t    st_ctime;
  55        s32             st_blksize;
  56        s32             st_blocks;
  57        char            st_fstype[16];
  58        s32             st_pad4[8];     /* expansion area */
  59};
  60
  61struct sol_stat64 {
  62        u32             st_dev;
  63        s32             st_pad1[3];     /* network id */
  64        u64             st_ino;
  65        u32             st_mode;
  66        u32             st_nlink;
  67        u32             st_uid;
  68        u32             st_gid;
  69        u32             st_rdev;
  70        s32             st_pad2[2];
  71        s64             st_size;
  72        timestruct_t    st_atime;
  73        timestruct_t    st_mtime;
  74        timestruct_t    st_ctime;
  75        s64             st_blksize;
  76        s32             st_blocks;
  77        char            st_fstype[16];
  78        s32             st_pad4[4];     /* expansion area */
  79};
  80
  81#define UFSMAGIC (((unsigned)'u'<<24)||((unsigned)'f'<<16)||((unsigned)'s'<<8))
  82
  83static inline int putstat(struct sol_stat __user *ubuf, struct kstat *kbuf)
  84{
  85        u32 ino;
  86
  87        if (kbuf->size > MAX_NON_LFS ||
  88            !sysv_valid_dev(kbuf->dev) ||
  89            !sysv_valid_dev(kbuf->rdev))
  90                return -EOVERFLOW;
  91        ino = kbuf->ino;
  92        if (sizeof(ino) < sizeof(kbuf->ino) && ino != kbuf->ino)
  93                return -EOVERFLOW;
  94        if (put_user (sysv_encode_dev(kbuf->dev), &ubuf->st_dev)        ||
  95            __put_user (ino, &ubuf->st_ino)                             ||
  96            __put_user (kbuf->mode, &ubuf->st_mode)             ||
  97            __put_user (kbuf->nlink, &ubuf->st_nlink)   ||
  98            __put_user (kbuf->uid, &ubuf->st_uid)               ||
  99            __put_user (kbuf->gid, &ubuf->st_gid)               ||
 100            __put_user (sysv_encode_dev(kbuf->rdev), &ubuf->st_rdev)    ||
 101            __put_user (kbuf->size, &ubuf->st_size)             ||
 102            __put_user (kbuf->atime.tv_sec, &ubuf->st_atime.tv_sec)     ||
 103            __put_user (kbuf->atime.tv_nsec, &ubuf->st_atime.tv_nsec)   ||
 104            __put_user (kbuf->mtime.tv_sec, &ubuf->st_mtime.tv_sec)     ||
 105            __put_user (kbuf->mtime.tv_nsec, &ubuf->st_mtime.tv_nsec)   ||
 106            __put_user (kbuf->ctime.tv_sec, &ubuf->st_ctime.tv_sec)     ||
 107            __put_user (kbuf->ctime.tv_nsec, &ubuf->st_ctime.tv_nsec)   ||
 108            __put_user (kbuf->blksize, &ubuf->st_blksize)       ||
 109            __put_user (kbuf->blocks, &ubuf->st_blocks) ||
 110            __put_user (UFSMAGIC, (unsigned __user *)ubuf->st_fstype))
 111                return -EFAULT;
 112        return 0;
 113}
 114
 115static inline int putstat64(struct sol_stat64 __user *ubuf, struct kstat *kbuf)
 116{
 117        if (!sysv_valid_dev(kbuf->dev) || !sysv_valid_dev(kbuf->rdev))
 118                return -EOVERFLOW;
 119        if (put_user (sysv_encode_dev(kbuf->dev), &ubuf->st_dev)        ||
 120            __put_user (kbuf->ino, &ubuf->st_ino)               ||
 121            __put_user (kbuf->mode, &ubuf->st_mode)             ||
 122            __put_user (kbuf->nlink, &ubuf->st_nlink)   ||
 123            __put_user (kbuf->uid, &ubuf->st_uid)               ||
 124            __put_user (kbuf->gid, &ubuf->st_gid)               ||
 125            __put_user (sysv_encode_dev(kbuf->rdev), &ubuf->st_rdev)    ||
 126            __put_user (kbuf->size, &ubuf->st_size)             ||
 127            __put_user (kbuf->atime.tv_sec, &ubuf->st_atime.tv_sec)     ||
 128            __put_user (kbuf->atime.tv_nsec, &ubuf->st_atime.tv_nsec)   ||
 129            __put_user (kbuf->mtime.tv_sec, &ubuf->st_mtime.tv_sec)     ||
 130            __put_user (kbuf->mtime.tv_nsec, &ubuf->st_mtime.tv_nsec)   ||
 131            __put_user (kbuf->ctime.tv_sec, &ubuf->st_ctime.tv_sec)     ||
 132            __put_user (kbuf->ctime.tv_nsec, &ubuf->st_ctime.tv_nsec)   ||
 133            __put_user (kbuf->blksize, &ubuf->st_blksize)       ||
 134            __put_user (kbuf->blocks, &ubuf->st_blocks) ||
 135            __put_user (UFSMAGIC, (unsigned __user *)ubuf->st_fstype))
 136                return -EFAULT;
 137        return 0;
 138}
 139
 140asmlinkage int solaris_stat(u32 filename, u32 statbuf)
 141{
 142        struct kstat s;
 143        int ret = vfs_stat(A(filename), &s);
 144        if (!ret)
 145                return putstat(A(statbuf), &s);
 146        return ret;
 147}
 148
 149asmlinkage int solaris_xstat(int vers, u32 filename, u32 statbuf)
 150{
 151        /* Solaris doesn't bother with looking at vers, so we do neither */
 152        return solaris_stat(filename, statbuf);
 153}
 154
 155asmlinkage int solaris_stat64(u32 filename, u32 statbuf)
 156{
 157        struct kstat s;
 158        int ret = vfs_stat(A(filename), &s);
 159        if (!ret)
 160                return putstat64(A(statbuf), &s);
 161        return ret;
 162}
 163
 164asmlinkage int solaris_lstat(u32 filename, u32 statbuf)
 165{
 166        struct kstat s;
 167        int ret = vfs_lstat(A(filename), &s);
 168        if (!ret)
 169                return putstat(A(statbuf), &s);
 170        return ret;
 171}
 172
 173asmlinkage int solaris_lxstat(int vers, u32 filename, u32 statbuf)
 174{
 175        return solaris_lstat(filename, statbuf);
 176}
 177
 178asmlinkage int solaris_lstat64(u32 filename, u32 statbuf)
 179{
 180        struct kstat s;
 181        int ret = vfs_lstat(A(filename), &s);
 182        if (!ret)
 183                return putstat64(A(statbuf), &s);
 184        return ret;
 185}
 186
 187asmlinkage int solaris_fstat(unsigned int fd, u32 statbuf)
 188{
 189        struct kstat s;
 190        int ret = vfs_fstat(fd, &s);
 191        if (!ret)
 192                return putstat(A(statbuf), &s);
 193        return ret;
 194}
 195
 196asmlinkage int solaris_fxstat(int vers, u32 fd, u32 statbuf)
 197{
 198        return solaris_fstat(fd, statbuf);
 199}
 200
 201asmlinkage int solaris_fstat64(unsigned int fd, u32 statbuf)
 202{
 203        struct kstat s;
 204        int ret = vfs_fstat(fd, &s);
 205        if (!ret)
 206                return putstat64(A(statbuf), &s);
 207        return ret;
 208}
 209
 210asmlinkage int solaris_mknod(u32 path, u32 mode, s32 dev)
 211{
 212        int (*sys_mknod)(const char __user *,int,unsigned) = 
 213                (int (*)(const char __user *,int,unsigned))SYS(mknod);
 214        int major = sysv_major(dev);
 215        int minor = sysv_minor(dev);
 216
 217        /* minor is guaranteed to be OK for MKDEV, major might be not */
 218        if (major > 0xfff)
 219                return -EINVAL;
 220        return sys_mknod(A(path), mode, new_encode_dev(MKDEV(major,minor)));
 221}
 222
 223asmlinkage int solaris_xmknod(int vers, u32 path, u32 mode, s32 dev)
 224{
 225        return solaris_mknod(path, mode, dev);
 226}
 227
 228asmlinkage int solaris_getdents64(unsigned int fd, void __user *dirent, unsigned int count)
 229{
 230        int (*sys_getdents)(unsigned int, void __user *, unsigned int) =
 231                (int (*)(unsigned int, void __user *, unsigned int))SYS(getdents);
 232                
 233        return sys_getdents(fd, dirent, count);
 234}
 235
 236/* This statfs thingie probably will go in the near future, but... */
 237
 238struct sol_statfs {
 239        short   f_type;
 240        s32     f_bsize;
 241        s32     f_frsize;
 242        s32     f_blocks;
 243        s32     f_bfree;
 244        u32     f_files;
 245        u32     f_ffree;
 246        char    f_fname[6];
 247        char    f_fpack[6];
 248};
 249
 250asmlinkage int solaris_statfs(u32 path, u32 buf, int len, int fstype)
 251{
 252        int ret;
 253        struct statfs s;
 254        mm_segment_t old_fs = get_fs();
 255        int (*sys_statfs)(const char __user *,struct statfs __user *) = 
 256                (int (*)(const char __user *,struct statfs __user *))SYS(statfs);
 257        struct sol_statfs __user *ss = A(buf);
 258        
 259        if (len != sizeof(struct sol_statfs)) return -EINVAL;
 260        if (!fstype) {
 261                /* FIXME: mixing userland and kernel pointers */
 262                set_fs (KERNEL_DS);
 263                ret = sys_statfs(A(path), &s);
 264                set_fs (old_fs);
 265                if (!ret) {
 266                        if (put_user (s.f_type, &ss->f_type)            ||
 267                            __put_user (s.f_bsize, &ss->f_bsize)        ||
 268                            __put_user (0, &ss->f_frsize)               ||
 269                            __put_user (s.f_blocks, &ss->f_blocks)      ||
 270                            __put_user (s.f_bfree, &ss->f_bfree)        ||
 271                            __put_user (s.f_files, &ss->f_files)        ||
 272                            __put_user (s.f_ffree, &ss->f_ffree)        ||
 273                            __clear_user (&ss->f_fname, 12))
 274                                return -EFAULT;
 275                }
 276                return ret;
 277        }
 278/* Linux can't stat unmounted filesystems so we
 279 * simply lie and claim 100MB of 1GB is free. Sorry.
 280 */
 281        if (put_user (fstype, &ss->f_type)              ||
 282            __put_user (1024, &ss->f_bsize)             ||
 283            __put_user (0, &ss->f_frsize)               ||
 284            __put_user (1024*1024, &ss->f_blocks)       ||
 285            __put_user (100*1024, &ss->f_bfree)         ||
 286            __put_user (60000, &ss->f_files)            ||
 287            __put_user (50000, &ss->f_ffree)            ||
 288            __clear_user (&ss->f_fname, 12))
 289                return -EFAULT;
 290        return 0;
 291}
 292
 293asmlinkage int solaris_fstatfs(u32 fd, u32 buf, int len, int fstype)
 294{
 295        int ret;
 296        struct statfs s;
 297        mm_segment_t old_fs = get_fs();
 298        int (*sys_fstatfs)(unsigned,struct statfs __user *) = 
 299                (int (*)(unsigned,struct statfs __user *))SYS(fstatfs);
 300        struct sol_statfs __user *ss = A(buf);
 301        
 302        if (len != sizeof(struct sol_statfs)) return -EINVAL;
 303        if (!fstype) {
 304                set_fs (KERNEL_DS);
 305                ret = sys_fstatfs(fd, &s);
 306                set_fs (old_fs);
 307                if (!ret) {
 308                        if (put_user (s.f_type, &ss->f_type)            ||
 309                            __put_user (s.f_bsize, &ss->f_bsize)        ||
 310                            __put_user (0, &ss->f_frsize)               ||
 311                            __put_user (s.f_blocks, &ss->f_blocks)      ||
 312                            __put_user (s.f_bfree, &ss->f_bfree)        ||
 313                            __put_user (s.f_files, &ss->f_files)        ||
 314                            __put_user (s.f_ffree, &ss->f_ffree)        ||
 315                            __clear_user (&ss->f_fname, 12))
 316                                return -EFAULT;
 317                }
 318                return ret;
 319        }
 320        /* Otherwise fstatfs is the same as statfs */
 321        return solaris_statfs(0, buf, len, fstype);
 322}
 323
 324struct sol_statvfs {
 325        u32     f_bsize;
 326        u32     f_frsize;
 327        u32     f_blocks;
 328        u32     f_bfree;
 329        u32     f_bavail;
 330        u32     f_files;
 331        u32     f_ffree;
 332        u32     f_favail;
 333        u32     f_fsid;
 334        char    f_basetype[16];
 335        u32     f_flag;
 336        u32     f_namemax;
 337        char    f_fstr[32];
 338        u32     f_filler[16];
 339};
 340
 341struct sol_statvfs64 {
 342        u32     f_bsize;
 343        u32     f_frsize;
 344        u64     f_blocks;
 345        u64     f_bfree;
 346        u64     f_bavail;
 347        u64     f_files;
 348        u64     f_ffree;
 349        u64     f_favail;
 350        u32     f_fsid;
 351        char    f_basetype[16];
 352        u32     f_flag;
 353        u32     f_namemax;
 354        char    f_fstr[32];
 355        u32     f_filler[16];
 356};
 357
 358static int report_statvfs(struct vfsmount *mnt, struct inode *inode, u32 buf)
 359{
 360        struct kstatfs s;
 361        int error;
 362        struct sol_statvfs __user *ss = A(buf);
 363
 364        error = vfs_statfs(mnt->mnt_root, &s);
 365        if (!error) {
 366                const char *p = mnt->mnt_sb->s_type->name;
 367                int i = 0;
 368                int j = strlen (p);
 369                
 370                if (j > 15) j = 15;
 371                if (IS_RDONLY(inode)) i = 1;
 372                if (mnt->mnt_flags & MNT_NOSUID) i |= 2;
 373                if (!sysv_valid_dev(inode->i_sb->s_dev))
 374                        return -EOVERFLOW;
 375                if (put_user (s.f_bsize, &ss->f_bsize)          ||
 376                    __put_user (0, &ss->f_frsize)               ||
 377                    __put_user (s.f_blocks, &ss->f_blocks)      ||
 378                    __put_user (s.f_bfree, &ss->f_bfree)        ||
 379                    __put_user (s.f_bavail, &ss->f_bavail)      ||
 380                    __put_user (s.f_files, &ss->f_files)        ||
 381                    __put_user (s.f_ffree, &ss->f_ffree)        ||
 382                    __put_user (s.f_ffree, &ss->f_favail)       ||
 383                    __put_user (sysv_encode_dev(inode->i_sb->s_dev), &ss->f_fsid) ||
 384                    __copy_to_user (ss->f_basetype,p,j)         ||
 385                    __put_user (0, (char __user *)&ss->f_basetype[j])   ||
 386                    __put_user (s.f_namelen, &ss->f_namemax)    ||
 387                    __put_user (i, &ss->f_flag)                 ||                  
 388                    __clear_user (&ss->f_fstr, 32))
 389                        return -EFAULT;
 390        }
 391        return error;
 392}
 393
 394static int report_statvfs64(struct vfsmount *mnt, struct inode *inode, u32 buf)
 395{
 396        struct kstatfs s;
 397        int error;
 398        struct sol_statvfs64 __user *ss = A(buf);
 399                        
 400        error = vfs_statfs(mnt->mnt_root, &s);
 401        if (!error) {
 402                const char *p = mnt->mnt_sb->s_type->name;
 403                int i = 0;
 404                int j = strlen (p);
 405                
 406                if (j > 15) j = 15;
 407                if (IS_RDONLY(inode)) i = 1;
 408                if (mnt->mnt_flags & MNT_NOSUID) i |= 2;
 409                if (!sysv_valid_dev(inode->i_sb->s_dev))
 410                        return -EOVERFLOW;
 411                if (put_user (s.f_bsize, &ss->f_bsize)          ||
 412                    __put_user (0, &ss->f_frsize)               ||
 413                    __put_user (s.f_blocks, &ss->f_blocks)      ||
 414                    __put_user (s.f_bfree, &ss->f_bfree)        ||
 415                    __put_user (s.f_bavail, &ss->f_bavail)      ||
 416                    __put_user (s.f_files, &ss->f_files)        ||
 417                    __put_user (s.f_ffree, &ss->f_ffree)        ||
 418                    __put_user (s.f_ffree, &ss->f_favail)       ||
 419                    __put_user (sysv_encode_dev(inode->i_sb->s_dev), &ss->f_fsid) ||
 420                    __copy_to_user (ss->f_basetype,p,j)         ||
 421                    __put_user (0, (char __user *)&ss->f_basetype[j])   ||
 422                    __put_user (s.f_namelen, &ss->f_namemax)    ||
 423                    __put_user (i, &ss->f_flag)                 ||                  
 424                    __clear_user (&ss->f_fstr, 32))
 425                        return -EFAULT;
 426        }
 427        return error;
 428}
 429
 430asmlinkage int solaris_statvfs(u32 path, u32 buf)
 431{
 432        struct nameidata nd;
 433        int error;
 434
 435        error = user_path_walk(A(path),&nd);
 436        if (!error) {
 437                struct inode * inode = nd.dentry->d_inode;
 438                error = report_statvfs(nd.mnt, inode, buf);
 439                path_release(&nd);
 440        }
 441        return error;
 442}
 443
 444asmlinkage int solaris_fstatvfs(unsigned int fd, u32 buf)
 445{
 446        struct file * file;
 447        int error;
 448
 449        error = -EBADF;
 450        file = fget(fd);
 451        if (file) {
 452                error = report_statvfs(file->f_path.mnt, file->f_path.dentry->d_inode, buf);
 453                fput(file);
 454        }
 455
 456        return error;
 457}
 458
 459asmlinkage int solaris_statvfs64(u32 path, u32 buf)
 460{
 461        struct nameidata nd;
 462        int error;
 463
 464        lock_kernel();
 465        error = user_path_walk(A(path), &nd);
 466        if (!error) {
 467                struct inode * inode = nd.dentry->d_inode;
 468                error = report_statvfs64(nd.mnt, inode, buf);
 469                path_release(&nd);
 470        }
 471        unlock_kernel();
 472        return error;
 473}
 474
 475asmlinkage int solaris_fstatvfs64(unsigned int fd, u32 buf)
 476{
 477        struct file * file;
 478        int error;
 479
 480        error = -EBADF;
 481        file = fget(fd);
 482        if (file) {
 483                lock_kernel();
 484                error = report_statvfs64(file->f_path.mnt, file->f_path.dentry->d_inode, buf);
 485                unlock_kernel();
 486                fput(file);
 487        }
 488        return error;
 489}
 490
 491extern asmlinkage long sparc32_open(const char * filename, int flags, int mode);
 492
 493asmlinkage int solaris_open(u32 fname, int flags, u32 mode)
 494{
 495        const char *filename = (const char *)(long)fname;
 496        int fl = flags & 0xf;
 497
 498        /* Translate flags first. */
 499        if (flags & 0x2000) fl |= O_LARGEFILE;
 500        if (flags & 0x8050) fl |= O_SYNC;
 501        if (flags & 0x80) fl |= O_NONBLOCK;
 502        if (flags & 0x100) fl |= O_CREAT;
 503        if (flags & 0x200) fl |= O_TRUNC;
 504        if (flags & 0x400) fl |= O_EXCL;
 505        if (flags & 0x800) fl |= O_NOCTTY;
 506        flags = fl;
 507
 508        return sparc32_open(filename, flags, mode);
 509}
 510
 511#define SOL_F_SETLK     6
 512#define SOL_F_SETLKW    7
 513#define SOL_F_FREESP    11
 514#define SOL_F_ISSTREAM  13
 515#define SOL_F_GETLK     14
 516#define SOL_F_PRIV      15
 517#define SOL_F_NPRIV     16
 518#define SOL_F_QUOTACTL  17
 519#define SOL_F_BLOCKS    18
 520#define SOL_F_BLKSIZE   19
 521#define SOL_F_GETOWN    23
 522#define SOL_F_SETOWN    24
 523
 524struct sol_flock {
 525        short   l_type;
 526        short   l_whence;
 527        u32     l_start;
 528        u32     l_len;
 529        s32     l_sysid;
 530        s32     l_pid;
 531        s32     l_pad[4];
 532};
 533
 534asmlinkage int solaris_fcntl(unsigned fd, unsigned cmd, u32 arg)
 535{
 536        int (*sys_fcntl)(unsigned,unsigned,unsigned long) = 
 537                (int (*)(unsigned,unsigned,unsigned long))SYS(fcntl);
 538        int ret, flags;
 539
 540        switch (cmd) {
 541        case F_DUPFD:
 542        case F_GETFD:
 543        case F_SETFD: return sys_fcntl(fd, cmd, (unsigned long)arg);
 544        case F_GETFL:
 545                flags = sys_fcntl(fd, cmd, 0);
 546                ret = flags & 0xf;
 547                if (flags & O_SYNC) ret |= 0x8050;
 548                if (flags & O_NONBLOCK) ret |= 0x80;
 549                return ret;
 550        case F_SETFL:
 551                flags = arg & 0xf;
 552                if (arg & 0x8050) flags |= O_SYNC;
 553                if (arg & 0x80) flags |= O_NONBLOCK;
 554                return sys_fcntl(fd, cmd, (long)flags);
 555        case SOL_F_GETLK:
 556        case SOL_F_SETLK:
 557        case SOL_F_SETLKW:
 558                {
 559                        struct flock f;
 560                        struct sol_flock __user *p = A(arg);
 561                        mm_segment_t old_fs = get_fs();
 562
 563                        switch (cmd) {
 564                        case SOL_F_GETLK: cmd = F_GETLK; break;
 565                        case SOL_F_SETLK: cmd = F_SETLK; break;
 566                        case SOL_F_SETLKW: cmd = F_SETLKW; break;
 567                        }
 568
 569                        if (get_user (f.l_type, &p->l_type) ||
 570                            __get_user (f.l_whence, &p->l_whence) ||
 571                            __get_user (f.l_start, &p->l_start) ||
 572                            __get_user (f.l_len, &p->l_len) ||
 573                            __get_user (f.l_pid, &p->l_sysid))
 574                                return -EFAULT;
 575
 576                        set_fs(KERNEL_DS);
 577                        ret = sys_fcntl(fd, cmd, (unsigned long)&f);
 578                        set_fs(old_fs);
 579
 580                        if (__put_user (f.l_type, &p->l_type) ||
 581                            __put_user (f.l_whence, &p->l_whence) ||
 582                            __put_user (f.l_start, &p->l_start) ||
 583                            __put_user (f.l_len, &p->l_len) ||
 584                            __put_user (f.l_pid, &p->l_pid) ||
 585                            __put_user (0, &p->l_sysid))
 586                                return -EFAULT;
 587
 588                        return ret;
 589                }
 590        case SOL_F_FREESP:
 591                { 
 592                    int length;
 593                    int (*sys_newftruncate)(unsigned int, unsigned long)=
 594                            (int (*)(unsigned int, unsigned long))SYS(ftruncate);
 595
 596                    if (get_user(length, &((struct sol_flock __user *)A(arg))->l_start))
 597                            return -EFAULT;
 598
 599                    return sys_newftruncate(fd, length);
 600                }
 601        };
 602        return -EINVAL;
 603}
 604
 605asmlinkage int solaris_ulimit(int cmd, int val)
 606{
 607        switch (cmd) {
 608        case 1: /* UL_GETFSIZE - in 512B chunks */
 609                return current->signal->rlim[RLIMIT_FSIZE].rlim_cur >> 9;
 610        case 2: /* UL_SETFSIZE */
 611                if ((unsigned long)val > (LONG_MAX>>9)) return -ERANGE;
 612                val <<= 9;
 613                task_lock(current->group_leader);
 614                if (val > current->signal->rlim[RLIMIT_FSIZE].rlim_max) {
 615                        if (!capable(CAP_SYS_RESOURCE)) {
 616                                task_unlock(current->group_leader);
 617                                return -EPERM;
 618                        }
 619                        current->signal->rlim[RLIMIT_FSIZE].rlim_max = val;
 620                }
 621                current->signal->rlim[RLIMIT_FSIZE].rlim_cur = val;
 622                task_unlock(current->group_leader);
 623                return 0;
 624        case 3: /* UL_GMEMLIM */
 625                return current->signal->rlim[RLIMIT_DATA].rlim_cur;
 626        case 4: /* UL_GDESLIM */
 627                return NR_OPEN;
 628        }
 629        return -EINVAL;
 630}
 631
 632/* At least at the time I'm writing this, Linux doesn't have ACLs, so we
 633   just fake this */
 634asmlinkage int solaris_acl(u32 filename, int cmd, int nentries, u32 aclbufp)
 635{
 636        return -ENOSYS;
 637}
 638
 639asmlinkage int solaris_facl(unsigned int fd, int cmd, int nentries, u32 aclbufp)
 640{
 641        return -ENOSYS;
 642}
 643
 644asmlinkage int solaris_pread(unsigned int fd, char __user *buf, u32 count, u32 pos)
 645{
 646        ssize_t (*sys_pread64)(unsigned int, char __user *, size_t, loff_t) =
 647                (ssize_t (*)(unsigned int, char __user *, size_t, loff_t))SYS(pread64);
 648
 649        return sys_pread64(fd, buf, count, (loff_t)pos);
 650}
 651
 652asmlinkage int solaris_pwrite(unsigned int fd, char __user *buf, u32 count, u32 pos)
 653{
 654        ssize_t (*sys_pwrite64)(unsigned int, char __user *, size_t, loff_t) =
 655                (ssize_t (*)(unsigned int, char __user *, size_t, loff_t))SYS(pwrite64);
 656
 657        return sys_pwrite64(fd, buf, count, (loff_t)pos);
 658}
 659
 660/* POSIX.1 names */
 661#define _PC_LINK_MAX    1
 662#define _PC_MAX_CANON   2
 663#define _PC_MAX_INPUT   3
 664#define _PC_NAME_MAX    4
 665#define _PC_PATH_MAX    5
 666#define _PC_PIPE_BUF    6
 667#define _PC_NO_TRUNC    7
 668#define _PC_VDISABLE    8
 669#define _PC_CHOWN_RESTRICTED    9
 670/* POSIX.4 names */
 671#define _PC_ASYNC_IO    10
 672#define _PC_PRIO_IO     11
 673#define _PC_SYNC_IO     12
 674#define _PC_LAST        12
 675
 676/* This is not a real and complete implementation yet, just to keep
 677 * the easy Solaris binaries happy.
 678 */
 679asmlinkage int solaris_fpathconf(int fd, int name)
 680{
 681        int ret;
 682
 683        switch(name) {
 684        case _PC_LINK_MAX:
 685                ret = LINK_MAX;
 686                break;
 687        case _PC_MAX_CANON:
 688                ret = MAX_CANON;
 689                break;
 690        case _PC_MAX_INPUT:
 691                ret = MAX_INPUT;
 692                break;
 693        case _PC_NAME_MAX:
 694                ret = NAME_MAX;
 695                break;
 696        case _PC_PATH_MAX:
 697                ret = PATH_MAX;
 698                break;
 699        case _PC_PIPE_BUF:
 700                ret = PIPE_BUF;
 701                break;
 702        case _PC_CHOWN_RESTRICTED:
 703                ret = 1;
 704                break;
 705        case _PC_NO_TRUNC:
 706        case _PC_VDISABLE:
 707                ret = 0;
 708                break;
 709        default:
 710                ret = -EINVAL;
 711                break;
 712        }
 713        return ret;
 714}
 715
 716asmlinkage int solaris_pathconf(u32 path, int name)
 717{
 718        return solaris_fpathconf(0, name);
 719}
 720
 721/* solaris_llseek returns long long - quite difficult */
 722asmlinkage long solaris_llseek(struct pt_regs *regs, u32 off_hi, u32 off_lo, int whence)
 723{
 724        int (*sys_llseek)(unsigned int, unsigned long, unsigned long, loff_t __user *, unsigned int) =
 725                (int (*)(unsigned int, unsigned long, unsigned long, loff_t __user *, unsigned int))SYS(_llseek);
 726        int ret;
 727        mm_segment_t old_fs = get_fs();
 728        loff_t retval;
 729        
 730        set_fs(KERNEL_DS);
 731        ret = sys_llseek((unsigned int)regs->u_regs[UREG_I0], off_hi, off_lo, &retval, whence);
 732        set_fs(old_fs);
 733        if (ret < 0) return ret;
 734        regs->u_regs[UREG_I1] = (u32)retval;
 735        return (retval >> 32);
 736}
 737
 738/* Have to mask out all but lower 3 bits */
 739asmlinkage int solaris_access(u32 filename, long mode)
 740{
 741        int (*sys_access)(const char __user *, int) = 
 742                (int (*)(const char __user *, int))SYS(access);
 743                
 744        return sys_access(A(filename), mode & 7);
 745}
 746