src/afs/DARWIN/osi_file.c

   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 #include <afsconfig.h>
  11 #include "afs/param.h"
  12
  13
  14 #include "afs/sysincludes.h"    /* Standard vendor system headers */
  15 #include "afsincludes.h"        /* Afs-based standard headers */
  16 #include "afs/afs_stats.h"      /* afs statistics */
  17 #include "afs/osi_inode.h"
  18
  19
  20 int afs_osicred_initialized = 0;
  21 afs_ucred_t afs_osi_cred;
  22 afs_lock_t afs_xosi;            /* lock is for tvattr */
  23 extern struct osi_dev cacheDev;
  24 extern struct mount *afs_cacheVfsp;
  25 int afs_CacheFSType = -1;
  26
  27 /* Initialize the cache operations. Called while initializing cache files. */
  28 void
  29 afs_InitDualFSCacheOps(struct vnode *vp)
  30 {
  31     int code;
  32     static int inited = 0;
  33 #ifdef AFS_DARWIN80_ENV
  34     char *buffer = (char*)_MALLOC(MFSNAMELEN, M_TEMP, M_WAITOK);
  35 #endif
  36
  37     if (inited)
  38         return;
  39     inited = 1;
  40
  41     if (vp == NULL)
  42         return;
  43 #ifdef AFS_DARWIN80_ENV
  44     vfs_name(vnode_mount(vp), buffer);
  45     if (strncmp("hfs", buffer, 3) == 0)
  46 #else
  47     if (strncmp("hfs", vp->v_mount->mnt_vfc->vfc_name, 3) == 0)
  48 #endif
  49         afs_CacheFSType = AFS_APPL_HFS_CACHE;
  50 #ifdef AFS_DARWIN80_ENV
  51     else if (strncmp("ufs", buffer, 3) == 0)
  52 #else
  53     else if (strncmp("ufs", vp->v_mount->mnt_vfc->vfc_name, 3) == 0)
  54 #endif
  55         afs_CacheFSType = AFS_APPL_UFS_CACHE;
  56 #ifdef AFS_DARWIN80_ENV
  57     else if (strncmp("apfs", buffer, 4) == 0)
  58         afs_CacheFSType = AFS_APPL_APFS_CACHE;
  59 #endif
  60     else
  61         osi_Panic("Unknown cache vnode type\n");
  62 #ifdef AFS_DARWIN80_ENV
  63     _FREE(buffer, M_TEMP);
  64 #endif
  65 }
  66
  67 ino_t
  68 VnodeToIno(vnode_t avp)
  69 {
  70     unsigned long ret;
  71
  72 #ifndef AFS_DARWIN80_ENV
  73     if (afs_CacheFSType == AFS_APPL_UFS_CACHE) {
  74         struct inode *ip = VTOI(avp);
  75         ret = ip->i_number;
  76     } else if (afs_CacheFSType == AFS_APPL_HFS_CACHE) {
  77 #endif
  78 #if defined(AFS_DARWIN80_ENV)
  79         struct vattr va;
  80         VATTR_INIT(&va);
  81         VATTR_WANTED(&va, va_fileid);
  82         if (vnode_getattr(avp, &va, afs_osi_ctxtp))
  83             osi_Panic("VOP_GETATTR failed in VnodeToIno\n");
  84         if (!VATTR_ALL_SUPPORTED(&va))
  85             osi_Panic("VOP_GETATTR unsupported fileid in VnodeToIno\n");
  86         ret = va.va_fileid;
  87 #elif !defined(VTOH)
  88         struct vattr va;
  89         if (VOP_GETATTR(avp, &va, &afs_osi_cred, current_proc()))
  90             osi_Panic("VOP_GETATTR failed in VnodeToIno\n");
  91         ret = va.va_fileid;
  92 #else
  93         struct hfsnode *hp = VTOH(avp);
  94         ret = H_FILEID(hp);
  95 #endif
  96 #ifndef AFS_DARWIN80_ENV
  97     } else
  98         osi_Panic("VnodeToIno called before cacheops initialized\n");
  99 #endif
 100     return ret;
 101 }
 102
 103
 104 dev_t
 105 VnodeToDev(vnode_t avp)
 106 {
 107 #ifndef AFS_DARWIN80_ENV
 108     if (afs_CacheFSType == AFS_APPL_UFS_CACHE) {
 109         struct inode *ip = VTOI(avp);
 110         return ip->i_dev;
 111     } else if (afs_CacheFSType == AFS_APPL_HFS_CACHE) {
 112 #endif
 113 #if defined(AFS_DARWIN80_ENV)
 114         struct vattr va;
 115         VATTR_INIT(&va);
 116         VATTR_WANTED(&va, va_fsid);
 117         if (vnode_getattr(avp, &va, afs_osi_ctxtp))
 118             osi_Panic("VOP_GETATTR failed in VnodeToDev\n");
 119         if (!VATTR_ALL_SUPPORTED(&va))
 120             osi_Panic("VOP_GETATTR unsupported fsid in VnodeToIno\n");
 121         return va.va_fsid;      /* XXX they say it's the dev.... */
 122 #elif !defined(VTOH)
 123         struct vattr va;
 124         if (VOP_GETATTR(avp, &va, &afs_osi_cred, current_proc()))
 125             osi_Panic("VOP_GETATTR failed in VnodeToDev\n");
 126         return va.va_fsid;      /* XXX they say it's the dev.... */
 127 #else
 128         struct hfsnode *hp = VTOH(avp);
 129         return H_DEV(hp);
 130 #endif
 131 #ifndef AFS_DARWIN80_ENV
 132     } else
 133         osi_Panic("VnodeToDev called before cacheops initialized\n");
 134 #endif
 135 }
 136
 137 void *
 138 osi_UFSOpen(afs_dcache_id_t *ainode)
 139 {
 140     struct vnode *vp;
 141     struct vattr va;
 142     struct osi_file *afile = NULL;
 143     extern int cacheDiskType;
 144     afs_int32 code = 0;
 145     int dummy;
 146     char fname[1024];
 147     struct osi_stat tstat;
 148
 149     AFS_STATCNT(osi_UFSOpen);
 150     if (cacheDiskType != AFS_FCACHE_TYPE_UFS) {
 151         osi_Panic("UFSOpen called for non-UFS cache\n");
 152     }
 153     if (!afs_osicred_initialized) {
 154         /* valid for alpha_osf, SunOS, Ultrix */
 155         memset(&afs_osi_cred, 0, sizeof(afs_ucred_t));
 156         afs_osi_cred.cr_ref++;
 157 #ifndef AFS_DARWIN110_ENV
 158         afs_osi_cred.cr_ngroups = 1;
 159 #endif
 160         afs_osicred_initialized = 1;
 161     }
 162     afile = osi_AllocSmallSpace(sizeof(struct osi_file));
 163     AFS_GUNLOCK();
 164 #ifdef AFS_CACHE_VNODE_PATH
 165     if (!ainode->ufs) {
 166         osi_Panic("No cache inode\n");
 167     }
 168
 169     code = vnode_open(ainode->ufs, O_RDWR, 0, 0, &vp, afs_osi_ctxtp);
 170 #else
 171 #ifndef AFS_DARWIN80_ENV
 172     if (afs_CacheFSType == AFS_APPL_HFS_CACHE)
 173         code = igetinode(afs_cacheVfsp, (dev_t) cacheDev.dev, &ainode->ufs, &vp, &va, &dummy);  /* XXX hfs is broken */
 174     else if (afs_CacheFSType == AFS_APPL_UFS_CACHE)
 175 #endif
 176         code =
 177             igetinode(afs_cacheVfsp, (dev_t) cacheDev.dev, (ino_t) ainode->ufs,
 178                       &vp, &va, &dummy);
 179 #ifndef AFS_DARWIN80_ENV
 180     else
 181         panic("osi_UFSOpen called before cacheops initialized\n");
 182 #endif
 183 #endif
 184     AFS_GLOCK();
 185     if (code) {
 186         osi_FreeSmallSpace(afile);
 187         osi_Panic("UFSOpen: igetinode failed");
 188     }
 189     afile->vnode = vp;
 190     afile->offset = 0;
 191     afile->proc = (int (*)())0;
 192 #ifndef AFS_CACHE_VNODE_PATH
 193     afile->size = va.va_size;
 194 #else
 195     code = afs_osi_Stat(afile, &tstat);
 196     afile->size = tstat.size;
 197 #endif
 198     return (void *)afile;
 199 }
 200
 201 int
 202 afs_osi_Stat(struct osi_file *afile, struct osi_stat *astat)
 203 {
 204     afs_int32 code;
 205     struct vattr tvattr;
 206     AFS_STATCNT(osi_Stat);
 207     ObtainWriteLock(&afs_xosi, 320);
 208     AFS_GUNLOCK();
 209 #ifdef AFS_DARWIN80_ENV
 210     VATTR_INIT(&tvattr);
 211     VATTR_WANTED(&tvattr, va_size);
 212     VATTR_WANTED(&tvattr, va_blocksize);
 213     VATTR_WANTED(&tvattr, va_mtime);
 214     VATTR_WANTED(&tvattr, va_atime);
 215     code = vnode_getattr(afile->vnode, &tvattr, afs_osi_ctxtp);
 216     if (code == 0 && !VATTR_ALL_SUPPORTED(&tvattr))
 217        code = EINVAL;
 218 #else
 219     code = VOP_GETATTR(afile->vnode, &tvattr, &afs_osi_cred, current_proc());
 220 #endif
 221     AFS_GLOCK();
 222     if (code == 0) {
 223         astat->size = tvattr.va_size;
 224         astat->mtime = tvattr.va_mtime.tv_sec;
 225         astat->atime = tvattr.va_atime.tv_sec;
 226     }
 227     ReleaseWriteLock(&afs_xosi);
 228     return code;
 229 }
 230
 231 int
 232 osi_UFSClose(struct osi_file *afile)
 233 {
 234     AFS_STATCNT(osi_Close);
 235     if (afile->vnode) {
 236 #ifdef AFS_DARWIN80_ENV
 237         vnode_close(afile->vnode, O_RDWR, afs_osi_ctxtp);
 238 #else
 239         AFS_RELE(afile->vnode);
 240 #endif
 241     }
 242
 243     osi_FreeSmallSpace(afile);
 244     return 0;
 245 }
 246
 247 int
 248 osi_UFSTruncate(struct osi_file *afile, afs_int32 asize)
 249 {
 250     afs_ucred_t *oldCred;
 251     struct vattr tvattr;
 252     afs_int32 code;
 253     struct osi_stat tstat;
 254     AFS_STATCNT(osi_Truncate);
 255
 256     /* This routine only shrinks files, and most systems
 257      * have very slow truncates, even when the file is already
 258      * small enough.  Check now and save some time.
 259      */
 260     code = afs_osi_Stat(afile, &tstat);
 261     if (code || tstat.size <= asize)
 262         return code;
 263     ObtainWriteLock(&afs_xosi, 321);
 264     AFS_GUNLOCK();
 265 #ifdef AFS_DARWIN80_ENV
 266     VATTR_INIT(&tvattr);
 267     VATTR_SET(&tvattr, va_size, asize);
 268     code = vnode_setattr(afile->vnode, &tvattr, afs_osi_ctxtp);
 269 #else
 270     VATTR_NULL(&tvattr);
 271     tvattr.va_size = asize;
 272     code = VOP_SETATTR(afile->vnode, &tvattr, &afs_osi_cred, current_proc());
 273 #endif
 274     AFS_GLOCK();
 275     ReleaseWriteLock(&afs_xosi);
 276     return code;
 277 }
 278
 279 void
 280 #ifdef AFS_DARWIN80_ENV
 281 osi_DisableAtimes(vnode_t avp)
 282 #else
 283 osi_DisableAtimes(struct vnode *avp)
 284 #endif
 285 {
 286 #ifdef AFS_DARWIN80_ENV
 287     struct vnode_attr vap;
 288
 289     VATTR_INIT(&vap);
 290     VATTR_CLEAR_SUPPORTED(&vap, va_access_time);
 291     vnode_setattr(avp, &vap, afs_osi_ctxtp);
 292 #else
 293     if (afs_CacheFSType == AFS_APPL_UFS_CACHE) {
 294         struct inode *ip = VTOI(avp);
 295         ip->i_flag &= ~IN_ACCESS;
 296     }
 297 #ifdef VTOH                     /* can't do this without internals */
 298     else if (afs_CacheFSType == AFS_APPL_HFS_CACHE) {
 299         struct hfsnode *hp = VTOH(avp);
 300         hp->h_nodeflags &= ~IN_ACCESS;
 301     }
 302 #endif
 303 #endif
 304 }
 305
 306
 307 /* Generic read interface */
 308 int
 309 afs_osi_Read(struct osi_file *afile, int offset, void *aptr,
 310              afs_int32 asize)
 311 {
 312     afs_ucred_t *oldCred;
 313     afs_size_t resid;
 314     afs_int32 code;
 315 #ifdef AFS_DARWIN80_ENV
 316     uio_t uio;
 317 #endif
 318     AFS_STATCNT(osi_Read);
 319
 320     /**
 321       * If the osi_file passed in is NULL, panic only if AFS is not shutting
 322       * down. No point in crashing when we are already shutting down
 323       */
 324     if (!afile) {
 325         if (afs_shuttingdown == AFS_RUNNING)
 326             osi_Panic("osi_Read called with null param");
 327         else
 328             return -EIO;
 329     }
 330
 331     if (offset != -1)
 332         afile->offset = offset;
 333     AFS_GUNLOCK();
 334 #ifdef AFS_DARWIN80_ENV
 335     uio=uio_create(1, afile->offset, AFS_UIOSYS, UIO_READ);
 336     uio_addiov(uio, CAST_USER_ADDR_T(aptr), asize);
 337     code = VNOP_READ(afile->vnode, uio, IO_UNIT, afs_osi_ctxtp);
 338     resid = AFS_UIO_RESID(uio);
 339     uio_free(uio);
 340 #else
 341     code =
 342         gop_rdwr(UIO_READ, afile->vnode, (caddr_t) aptr, asize, afile->offset,
 343                  AFS_UIOSYS, IO_UNIT, &afs_osi_cred, &resid);
 344 #endif
 345     AFS_GLOCK();
 346     if (code == 0) {
 347         code = asize - resid;
 348         afile->offset += code;
 349         osi_DisableAtimes(afile->vnode);
 350     } else {
 351         afs_Trace2(afs_iclSetp, CM_TRACE_READFAILED, ICL_TYPE_INT32, resid,
 352                    ICL_TYPE_INT32, code);
 353         if (code > 0) {
 354             code = -code;
 355         }
 356     }
 357     return code;
 358 }
 359
 360 /* Generic write interface */
 361 int
 362 afs_osi_Write(struct osi_file *afile, afs_int32 offset, void *aptr,
 363               afs_int32 asize)
 364 {
 365     afs_ucred_t *oldCred;
 366     afs_size_t resid;
 367     afs_int32 code;
 368 #ifdef AFS_DARWIN80_ENV
 369     uio_t uio;
 370 #endif
 371     AFS_STATCNT(osi_Write);
 372     if (!afile)
 373         osi_Panic("afs_osi_Write called with null param");
 374     if (offset != -1)
 375         afile->offset = offset;
 376     {
 377         AFS_GUNLOCK();
 378 #ifdef AFS_DARWIN80_ENV
 379         uio=uio_create(1, afile->offset, AFS_UIOSYS, UIO_WRITE);
 380         uio_addiov(uio, CAST_USER_ADDR_T(aptr), asize);
 381         code = VNOP_WRITE(afile->vnode, uio, IO_UNIT, afs_osi_ctxtp);
 382         resid = AFS_UIO_RESID(uio);
 383         uio_free(uio);
 384 #else
 385         code =
 386             gop_rdwr(UIO_WRITE, afile->vnode, (caddr_t) aptr, asize,
 387                      afile->offset, AFS_UIOSYS, IO_UNIT, &afs_osi_cred,
 388                      &resid);
 389 #endif
 390         AFS_GLOCK();
 391     }
 392     if (code == 0) {
 393         code = asize - resid;
 394         afile->offset += code;
 395     } else {
 396         if (code > 0) {
 397             code = -code;
 398         }
 399     }
 400     if (afile->proc) {
 401         (*afile->proc) (afile, code);
 402     }
 403     return code;
 404 }
 405
 406
 407
 408
 409
 410 void
 411 shutdown_osifile(void)
 412 {
 413     AFS_STATCNT(shutdown_osifile);
 414     if (afs_cold_shutdown) {
 415         afs_osicred_initialized = 0;
 416     }
 417 }