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