arch/sparc64/solaris/fs.c

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