src/afs/IRIX/osi_machdep.h

   1 /*
   2  * Copyright 2000, International Business Machines Corporation and others.
   3  * All Rights Reserved.
   4  *
   5  * This software has been released under the terms of the IBM Public
   6  * License.  For details, see the LICENSE file in the top-level source
   7  * directory or online at http://www.openafs.org/dl/license10.html
   8  */
   9
  10 /*
  11  * IRIX OSI header file. Extends afs_osi.h.
  12  *
  13  * afs_osi.h includes this file, which is the only way this file should
  14  * be included in a source file. This file can redefine macros declared in
  15  * afs_osi.h.
  16  */
  17 #ifndef _OSI_MACHDEP_H_
  18 #define _OSI_MACHDEP_H_
  19
  20 #include <sys/sema.h>
  21 #include <sys/pda.h>
  22 extern kmutex_t afs_global_lock;
  23
  24
  25 #undef osi_Time
  26 extern time_t time;
  27 #define osi_Time() (time)
  28
  29 /* This gets redefined from ucred to cred in osi_vfs.h, just do it right */
  30 typedef struct cred afs_ucred_t;
  31 typedef struct proc afs_proc_t;
  32
  33 #undef gop_lookupname
  34 #define gop_lookupname(fnamep,segflg,followlink,compvpp) lookupname((fnamep),(segflg),(followlink),NULL,(compvpp), NULL)
  35
  36 #undef gop_lookupname_user
  37 #define gop_lookupname_user(fnamep,segflg,followlink,compvpp) lookupname((fnamep),(segflg),(followlink),NULL,(compvpp), NULL)
  38
  39 #define osi_vnhold(avc, r)  do { VN_HOLD(AFSTOV(avc)); } while(0)
  40
  41 #ifdef AFS_SGI64_ENV
  42 #include <sys/flock.h>
  43 extern flid_t osi_flid;
  44 #define v_op v_bh.bh_first->bd_ops
  45 #define v_data v_bh.bh_first->bd_pdata
  46 #define vfs_data vfs_bh.bh_first->bd_pdata
  47 #endif /* AFS_SGI64_ENV */
  48
  49 /*
  50  * Global lock, semaphore, mutex and state vector support.
  51  */
  52 #define SV_INIT(cv, nm, t, c)   cv_init(cv, nm, t, c)
  53 /* Spinlock macros */
  54 #define SV_TYPE sv_t
  55 #define SV_SIGNAL(cv)           sv_signal(cv)
  56 #define SPINLOCK_INIT(l, nm)    spinlock_init((l),(nm))
  57 #define SPLOCK(l)               mp_mutex_spinlock(&(l))
  58 #define SPUNLOCK(l,s)           mp_mutex_spinunlock(&(l),s)
  59 #define SP_WAIT(l, s, cv, p)    mp_sv_wait_sig(cv, p, (void*)(&(l)), s)
  60 #ifdef AFS_SGI64_ENV
  61 #ifdef AFS_SGI65_ENV
  62 /* Add PLTWAIT for afsd's to wait so we don't rack up the load average. */
  63 #define AFSD_PRI() ((kt_basepri(curthreadp) == PTIME_SHARE) ? PZERO : (PZERO|PLTWAIT))
  64 #undef AFS_MUTEX_ENTER
  65 #define AFS_MUTEX_ENTER(mp) \
  66   MACRO_BEGIN \
  67     struct kthread *_kthreadP; \
  68     while(mutex_tryenter(mp) == 0) { \
  69       _kthreadP = (struct kthread*)mutex_owner(mp); \
  70       if (_kthreadP != NULL && _kthreadP->k_sonproc == CPU_NONE) { \
  71           mutex_lock(mp, AFSD_PRI()); \
  72           break; \
  73       } \
  74     } \
  75   MACRO_END
  76
  77 #else /* AFS_SGI65_ENV */
  78 /* Add PLTWAIT for afsd's to wait so we don't rack up the load average. */
  79 #define AFSD_PRI() ((curprocp && curprocp->p_rss==0) ? (PZERO|PLTWAIT) : PZERO)
  80
  81 #define AFS_MUTEX_ENTER(mp) \
  82   MACRO_BEGIN \
  83     kthread_t *kt; \
  84     while(mutex_tryenter(mp) == 0) { \
  85         kt = mutex_owner(mp); \
  86         if (kt != NULL && kt->k_sonproc == CPU_NONE) { \
  87             mutex_lock(mp, AFSD_PRI()); \
  88             break; \
  89         } \
  90     } \
  91   MACRO_END
  92 #endif /* AFS_SGI65_ENV */
  93
  94 #define cv_timedwait(cv, l, t)  {                               \
  95                                 sv_timedwait(cv, AFSD_PRI(), l, 0, 0, &(t), \
  96                                              (struct timespec*)0);      \
  97                                 AFS_MUTEX_ENTER(l); \
  98                                 }
  99 #ifdef cv_wait
 100 #undef cv_wait
 101 #endif
 102 #define cv_wait(cv, l) {                                        \
 103                         sv_wait(cv, AFSD_PRI(),  l, 0); \
 104                         AFS_MUTEX_ENTER(l); \
 105                        }
 106 #else /* AFS_SGI64_ENV */
 107 #ifdef AFS_SGI62_ENV
 108
 109 #define AFS_MUTEX_ENTER(mp) \
 110   MACRO_BEGIN \
 111     struct proc *_procP; \
 112     while(mutex_tryenter(mp) == 0) { \
 113         _procP = mutex_owner(mp); \
 114         if (_procP != NULL && _procP->p_sonproc == CPU_NONE) { \
 115             mutex_enter(mp); \
 116             break; \
 117         } \
 118     } \
 119   MACRO_END
 120
 121 #else /* AFS_SGI62_ENV */
 122
 123 #define AFS_MUTEX_ENTER(mp)     mutex_enter(mp)
 124
 125 #endif /* AFS_SGI62_ENV */
 126
 127 #define cv_timedwait(cv, l, t)  {                               \
 128                                   sv_timedwait(cv, l, t);       \
 129                                   AFS_GLOCK();                  \
 130                                 }
 131 #endif /* AFS_SGI64_ENV */
 132
 133 #if defined(KERNEL)
 134 #if defined(MP)
 135 #define _MP_NETLOCKS            /* to get sblock to work right */
 136
 137 /* On SGI mutex_owned doesn't work, so simulate this by remembering the owning
 138  * thread explicitly.  This is only used for debugging so could be disabled for
 139  * production builds.
 140  *
 141  * CAUTION -- The ISAFS_(RX)?GLOCK macros are not safe to use when the lock is
 142  *     not held if the test may be made at interrupt level as the code may
 143  *     appear to be running as the process that is (or last was) running at
 144  *     non-interrupt level. Worse yet, the interrupt may occur just as the
 145  *     process is exiting, in which case, the pid may change from the start
 146  *     of the interrupt to the end, since the u area has been changed. So,
 147  *     at interrupt level, I'm using the base of the current interrupt stack.
 148  *     Note that afs_osinet.c also modifies afs_global_owner for osi_Sleep and
 149  *     afs_osi_Wakeup. Changes made here should be reflected there as well.
 150  * NOTE - As of 6.2, we can no longer use mutexes in interrupts, so the above
 151  *     concern no longer exists.
 152  */
 153
 154 #ifdef AFS_SGI64_ENV
 155 #ifdef AFS_SGI65_ENV
 156 /* Irix does not check for deadlocks unless it's a debug kernel. */
 157 #define AFS_ASSERT_GNOTME() \
 158     (!ISAFS_GLOCK() || (panic("afs global lock held be me"), 0))
 159 #define AFS_GLOCK() \
 160         { AFS_ASSERT_GNOTME(); AFS_MUTEX_ENTER(&afs_global_lock); }
 161 #else
 162 #define AFS_GLOCK() AFS_MUTEX_ENTER(&afs_global_lock)
 163 #endif
 164 #define AFS_GUNLOCK()  { AFS_ASSERT_GLOCK(); mutex_exit(&afs_global_lock); }
 165 #define ISAFS_GLOCK() mutex_mine(&afs_global_lock)
 166 #else
 167 extern long afs_global_owner;
 168 #define AFS_GLOCK() \
 169   MACRO_BEGIN \
 170     AFS_MUTEX_ENTER(&afs_global_lock) ; \
 171     afs_global_owner = osi_ThreadUnique(); \
 172   MACRO_END
 173 #define AFS_GUNLOCK() \
 174     { AFS_ASSERT_GLOCK(); afs_global_owner = 0; mutex_exit(&afs_global_lock); }
 175 #define ISAFS_GLOCK() (osi_ThreadUnique() == afs_global_owner)
 176 #endif /* AFS_SGI64_ENV */
 177 #else /* MP */
 178 #define AFS_GLOCK()
 179 #define AFS_GUNLOCK()
 180 #define ISAFS_GLOCK() 1
 181
 182 #define SPLVAR      int splvar
 183 #define NETPRI      splvar=splnet()
 184 #define USERPRI     splx(splvar)
 185
 186
 187 #endif /* MP */
 188
 189 #endif /* KERNEL  */
 190
 191 #if defined(AFS_SGI62_ENV)
 192 # define osi_InitGlock() \
 193         mutex_init(&afs_global_lock, MUTEX_DEFAULT, "afs_global_lock");
 194 #else
 195 # define osi_InitGlock() \
 196         mutex_init(&afs_global_lock, "afs_global_lock", MUTEX_DEFAULT, NULL);
 197 #endif
 198
 199 #ifdef AFS_SGI64_ENV
 200 #define gop_rdwr(rw,gp,base,len,offset,segflg,ioflag,ulimit,cr,aresid) \
 201    vn_rdwr((rw),(gp),(base),(len),(offset),(segflg),(ioflag),(ulimit),(cr),\
 202            (int *)(aresid), &osi_flid)
 203 #else
 204 #define gop_rdwr(rw,gp,base,len,offset,segflg,ioflag,ulimit,cr,aresid) \
 205    vn_rdwr((rw),(gp),(base),(len),(offset),(segflg),(ioflag),(ulimit),(cr), \
 206            (int *)(aresid))
 207 #endif
 208
 209 #ifdef AFS_SGI64_ENV
 210 #undef suser
 211 #define suser()         cap_able(CAP_DEVICE_MGT)
 212 #endif
 213 #define afs_suser(x)    suser()
 214
 215 #define afs_hz HZ
 216
 217 #ifdef AFS_SGI64_ENV
 218 #undef setuerror
 219 #undef getuerror
 220 #endif
 221
 222
 223 /* OS independent user structure stuff */
 224 /*
 225  * OSI_GET_CURRENT_PID
 226  */
 227 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI64_ENV)
 228 #define OSI_GET_CURRENT_PID() (u.u_procp->p_pid)
 229 #endif /* AFS_SGI_ENV but not AFS_SGI64_ENV */
 230
 231 #if defined(AFS_SGI64_ENV) && !defined(AFS_SGI65_ENV)
 232 #define OSI_GET_CURRENT_PID() current_pid()
 233 #endif /* AFS_SGI64_ENV */
 234
 235 #if defined(AFS_SGI65_ENV)
 236 #define OSI_GET_CURRENT_PID() proc_pid(curproc())
 237 #endif
 238
 239 #define getpid()  OSI_GET_CURRENT_PID()
 240
 241 /*
 242  * OSI_GET_CURRENT_PROCP
 243  */
 244 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI64_ENV)
 245 #define OSI_GET_CURRENT_PROCP() (u.u_procp)
 246 #endif /* AFS_SGI_ENV but not AFS_SGI64_ENV */
 247
 248 #if defined(AFS_SGI64_ENV) && !defined(AFS_SGI65_ENV)
 249 #define OSI_GET_CURRENT_PROCP() curprocp
 250 #endif /* AFS_SGI64_ENV */
 251
 252 #if defined(AFS_SGI65_ENV)
 253 #define OSI_GET_CURRENT_PROCP() UT_TO_PROC(curuthread)
 254 #endif
 255
 256
 257 /*
 258  * OSI_GET_LOCKID
 259  *
 260  * Prior to IRIX 6.4, pid sufficed, now we need kthread.
 261  */
 262 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI64_ENV)
 263 #define OSI_GET_LOCKID() (u.u_procp->p_pid)
 264 #define OSI_NO_LOCKID (-1)
 265 #endif /* AFS_SGI_ENV but not AFS_SGI64_ENV */
 266
 267 #if defined(AFS_SGI64_ENV)
 268 /* IRIX returns k_id, but this way, we've got the thread address for debugging. */
 269 #define OSI_GET_LOCKID() \
 270         (private.p_curkthread ? (uint64_t)private.p_curkthread : (uint64_t)0)
 271 #define OSI_NO_LOCKID ((uint64_t)-1)
 272 #endif /* AFS_SGI64_ENV */
 273
 274 /*
 275  * OSI_GET_CURRENT_CRED
 276  */
 277 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI64_ENV)
 278 #define OSI_GET_CURRENT_CRED() (u.u_cred)
 279 #endif /* AFS_SGI_ENV but not AFS_SGI64_ENV */
 280
 281 #if defined(AFS_SGI64_ENV)
 282 #define OSI_GET_CURRENT_CRED() get_current_cred()
 283 #endif /* AFS_SGI64_ENV */
 284
 285 #define osi_curcred()           OSI_GET_CURRENT_CRED()
 286
 287 /*
 288  * OSI_SET_CURRENT_CRED
 289  */
 290 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI64_ENV)
 291 #define OSI_SET_CURRENT_CRED(x) u.u_cred=x
 292 #endif /* AFS_SGI_ENV but not AFS_SGI64_ENV */
 293
 294 #if defined(AFS_SGI64_ENV)
 295 #define OSI_SET_CURRENT_CRED(C) set_current_cred((C))
 296 #endif /* AFS_SGI64_ENV */
 297
 298 /*
 299  * OSI_GET_CURRENT_ABI
 300  */
 301 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI64_ENV)
 302 #define OSI_GET_CURRENT_ABI() (u.u_procp->p_abi)
 303 #endif /* AFS_SGI_ENV but not AFS_SGI64_ENV */
 304
 305 #if defined(AFS_SGI64_ENV)
 306 #define OSI_GET_CURRENT_ABI() get_current_abi()
 307 #endif /* AFS_SGI64_ENV */
 308
 309 /*
 310  * OSI_GET_CURRENT_SYSID
 311  */
 312 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI64_ENV)
 313 #define OSI_GET_CURRENT_SYSID() (u.u_procp->p_sysid)
 314 #endif /* AFS_SGI_ENV but not AFS_SGI64_ENV */
 315
 316 #if defined(AFS_SGI64_ENV)
 317 #define OSI_GET_CURRENT_SYSID() (curprocp->p_flid.fl_sysid)
 318 #endif /* AFS_SGI64_ENV */
 319
 320 /*
 321  * OSI_GET_CURRENT_COMM
 322  */
 323 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI64_ENV)
 324 #define OSI_GET_CURRENT_COMM() (u.u_comm)
 325 #endif /* AFS_SGI_ENV but not AFS_SGI64_ENV */
 326
 327 #if defined(AFS_SGI64_ENV)
 328 #define OSI_GET_CURRENT_COMM() (curprocp->p_comm)
 329 #endif /* AFS_SGI64_ENV */
 330
 331 /*
 332  * OSI_GET_CURRENT_CDIR
 333  */
 334 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI64_ENV)
 335 #define OSI_GET_CURRENT_CDIR() (u.u_cdir)
 336 #endif /* AFS_SGI_ENV but not AFS_SGI64_ENV */
 337
 338 #if defined(AFS_SGI64_ENV) && !defined(AFS_SGI65_ENV)
 339 #define OSI_GET_CURRENT_CDIR() (curprocp->p_cdir)
 340 #endif /* AFS_SGI64_ENV */
 341
 342 #if defined(AFS_SGI65_ENV)
 343 #define OSI_GET_CURRENT_CDIR() (curuthread->ut_cdir)
 344 #endif /* AFS_SGI65_ENV */
 345
 346
 347 /*
 348  * OSI_GET_CURRENT_RDIR
 349  */
 350 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI64_ENV)
 351 #define OSI_GET_CURRENT_RDIR() (u.u_rdir)
 352 #endif /* AFS_SGI_ENV but not AFS_SGI64_ENV */
 353
 354 #if defined(AFS_SGI64_ENV) && !defined(AFS_SGI65_ENV)
 355 #define OSI_GET_CURRENT_RDIR() (curprocp->p_rdir)
 356 #endif /* AFS_SGI64_ENV */
 357
 358 #if defined(AFS_SGI65_ENV)
 359 #define OSI_GET_CURRENT_RDIR() (curuthread->ut_rdir)
 360 #endif /* AFS_SGI65_ENV */
 361
 362
 363
 364 /* Macros for vcache/vnode and vfs arguments to vnode and vfs ops.
 365  *
 366  * Note that the _CONVERT routines get the ";" here so that argument lists
 367  * can have arguments after the OSI_x_CONVERT macro is called.
 368  */
 369 #ifdef AFS_SGI64_ENV
 370 #undef OSI_VN_ARG
 371 #define OSI_VN_ARG(V) bhv_##V
 372 #undef OSI_VN_DECL
 373 #define OSI_VN_DECL(V)  bhv_desc_t *bhv_##V
 374 #undef OSI_VN_CONVERT
 375 #define OSI_VN_CONVERT(V) struct vnode * V = (struct vnode*)BHV_TO_VNODE(bhv_##V)
 376 #undef OSI_VC_ARG
 377 #define OSI_VC_ARG(V) bhv_##V
 378 #undef OSI_VC_DECL
 379 #define OSI_VC_DECL(V)  bhv_desc_t *bhv_##V
 380 #undef OSI_VC_CONVERT
 381 #define OSI_VC_CONVERT(V) struct vcache * V = VTOAFS(BHV_TO_VNODE(bhv_##V))
 382 #undef OSI_VFS_ARG
 383 #define OSI_VFS_ARG(V) bhv_##V
 384 #undef OSI_VFS_DECL
 385 #define OSI_VFS_DECL(V)  bhv_desc_t *bhv_##V
 386 #undef OSI_VFS_CONVERT
 387 #define OSI_VFS_CONVERT(V) struct vfs * V = (struct vfs*)bhvtovfs(bhv_##V)
 388 #endif /* AFS_SGI64_ENV */
 389
 390 #define osi_procname(procname, size) strncpy(procname, proc_name(curproc()), size)
 391
 392
 393 #endif /* _OSI_MACHDEP_H_ */