src/afs/LINUX/osi_proc.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 /*
  11  * Linux module support routines.
  12  *
  13  */
  14 #include <afsconfig.h>
  15 #include "afs/param.h"
  16
  17
  18 #include <linux/module.h> /* early to avoid printf->printk mapping */
  19 #ifdef HAVE_LINUX_SEQ_FILE_H
  20 # include <linux/seq_file.h>
  21 #endif
  22 #include "afs/sysincludes.h"
  23 #include "afsincludes.h"
  24 #include "afs/nfsclient.h"
  25 #include <linux/unistd.h>               /* For syscall numbers. */
  26 #include <linux/mm.h>
  27
  28 #ifdef AFS_AMD64_LINUX20_ENV
  29 # include <asm/ia32_unistd.h>
  30 #endif
  31
  32 #include <linux/slab.h>
  33 #include <linux/init.h>
  34 #include <linux/sched.h>
  35 #include <linux/kernel.h>
  36
  37 #include "osi_compat.h"
  38
  39 struct proc_dir_entry *openafs_procfs;
  40
  41 #ifdef HAVE_LINUX_SEQ_FILE_H
  42 static void *
  43 c_start(struct seq_file *m, loff_t *pos)
  44 {
  45     struct afs_q *cq, *tq;
  46     loff_t n = 0;
  47
  48     AFS_GLOCK();
  49     ObtainReadLock(&afs_xcell);
  50     for (cq = CellLRU.next; cq != &CellLRU; cq = tq) {
  51         tq = QNext(cq);
  52
  53         if (n++ == *pos)
  54             break;
  55     }
  56     if (cq == &CellLRU)
  57         cq = NULL;
  58
  59     AFS_GUNLOCK();
  60     return cq;
  61 }
  62
  63 static void *
  64 c_next(struct seq_file *m, void *p, loff_t *pos)
  65 {
  66     struct afs_q *cq = p, *tq;
  67
  68     AFS_GLOCK();
  69     (*pos)++;
  70     tq = QNext(cq);
  71
  72     if (tq == &CellLRU)
  73         tq = NULL;
  74
  75     AFS_GUNLOCK();
  76     return tq;
  77 }
  78
  79 static void
  80 c_stop(struct seq_file *m, void *p)
  81 {
  82     AFS_GLOCK();
  83     ReleaseReadLock(&afs_xcell);
  84     AFS_GUNLOCK();
  85 }
  86
  87 static int
  88 c_show(struct seq_file *m, void *p)
  89 {
  90     struct afs_q *cq = p;
  91     struct cell *tc = QTOC(cq);
  92     int j;
  93
  94     seq_printf(m, ">%s #(%d/%d)\n", tc->cellName,
  95                tc->cellNum, tc->cellIndex);
  96
  97     for (j = 0; j < AFS_MAXCELLHOSTS; j++) {
  98         afs_uint32 addr;
  99
 100         if (!tc->cellHosts[j]) break;
 101
 102         addr = tc->cellHosts[j]->addr->sa_ip;
 103 #if defined(NIPQUAD)
 104         seq_printf(m, "%u.%u.%u.%u #%u.%u.%u.%u\n",
 105                    NIPQUAD(addr), NIPQUAD(addr));
 106 #else
 107         seq_printf(m, "%pI4 #%pI4\n", &addr, &addr);
 108 #endif
 109     }
 110
 111         return 0;
 112 }
 113
 114 static struct seq_operations afs_csdb_op = {
 115     .start = c_start,
 116     .next  = c_next,
 117     .stop  = c_stop,
 118     .show  = c_show,
 119 };
 120
 121 static int
 122 afs_csdb_open(struct inode *inode, struct file *file)
 123 {
 124     return seq_open(file, &afs_csdb_op);
 125 }
 126
 127 static struct file_operations afs_csdb_operations = {
 128     .open    = afs_csdb_open,
 129     .read    = seq_read,
 130     .llseek  = seq_lseek,
 131     .release = seq_release,
 132 };
 133
 134 static void *
 135 uu_start(struct seq_file *m, loff_t *pos)
 136 {
 137     struct unixuser *tu;
 138     void *ret;
 139     loff_t n = 0;
 140     afs_int32 i;
 141
 142     AFS_GLOCK();
 143     ObtainReadLock(&afs_xuser);
 144
 145     if (!*pos) {
 146         ret = (void *)(1);
 147         goto done;
 148     }
 149
 150     ret = NULL;
 151
 152     for (i = 0; i < NUSERS; i++) {
 153         for (tu = afs_users[i]; tu; tu = tu->next) {
 154             if (++n == *pos) {
 155                 ret = tu;
 156                 goto done;
 157             }
 158         }
 159     }
 160
 161  done:
 162     AFS_GUNLOCK();
 163     return ret;
 164 }
 165
 166 static void *
 167 uu_next(struct seq_file *m, void *p, loff_t *pos)
 168 {
 169     struct unixuser *tu = p;
 170     afs_int32 i = 0;
 171
 172     (*pos)++;
 173     if (!p) return NULL;
 174
 175     if (p != (void *)1) {
 176         if (tu->next) return tu->next;
 177         i = UHash(tu->uid) + 1;
 178     }
 179
 180     for (; i < NUSERS; i++)
 181         if (afs_users[i]) return afs_users[i];
 182     return NULL;
 183 }
 184
 185 static void
 186 uu_stop(struct seq_file *m, void *p)
 187 {
 188     AFS_GLOCK();
 189     ReleaseReadLock(&afs_xuser);
 190     AFS_GUNLOCK();
 191 }
 192
 193 static int
 194 uu_show(struct seq_file *m, void *p)
 195 {
 196     struct cell *tc = 0;
 197     struct unixuser *tu = p;
 198     union tokenUnion *token;
 199     char *cellname;
 200
 201     if (p == (void *)1) {
 202         seq_printf(m, "%10s %4s %-6s  %-25s %10s",
 203                    "UID/PAG", "Refs", "States", "Cell", "ViceID");
 204         seq_printf(m, "  %10s %10s %10s %3s",
 205                    "Tok Set", "Tok Begin", "Tok Expire", "vno");
 206         seq_printf(m, "  %-15s %10s %10s %s\n",
 207                    "NFS Client", "UID/PAG", "Client UID", "Sysname(s)");
 208
 209         return 0;
 210     }
 211
 212     AFS_GLOCK();
 213
 214     tu->refCount++;
 215     ReleaseReadLock(&afs_xuser);
 216
 217     afs_LockUser(tu, READ_LOCK, 0);
 218
 219     if (tu->cell == -1) {
 220         cellname = "<default>";
 221     } else {
 222         tc = afs_GetCellStale(tu->cell, READ_LOCK);
 223         if (tc) cellname = tc->cellName;
 224         else cellname = "<unknown>";
 225     }
 226
 227     seq_printf(m, "%10d %4d %04x    %-25s %10d",
 228                tu->uid, tu->refCount, tu->states, cellname, tu->viceId);
 229
 230     if (tc) afs_PutCell(tc, READ_LOCK);
 231
 232     if (tu->states & UHasTokens) {
 233         token = afs_FindToken(tu->tokens, RX_SECIDX_KAD);
 234         seq_printf(m, "  %10d %10d %10d %3d",
 235                    tu->tokenTime,
 236                    (token!=NULL)?token->rxkad.clearToken.BeginTimestamp:0,
 237                    (token!=NULL)?token->rxkad.clearToken.EndTimestamp:0,
 238                    (token!=NULL)?token->rxkad.clearToken.AuthHandle:0);
 239     } else {
 240         seq_printf(m, "  %-36s", "Tokens Not Set");
 241     }
 242
 243     if (tu->exporter && tu->exporter->exp_type == EXP_NFS) {
 244         struct nfsclientpag *np = (struct nfsclientpag *)(tu->exporter);
 245         char ipaddr[16];
 246         int i;
 247
 248 #if defined(NIPQUAD)
 249         sprintf(ipaddr, "%u.%u.%u.%u", NIPQUAD(np->host));
 250 #else
 251         sprintf(ipaddr, "%pI4", &np->host);
 252 #endif
 253         seq_printf(m, "  %-15s %10d %10d", ipaddr, np->uid, np->client_uid);
 254         if (np->sysnamecount) {
 255             for (i = 0; i < np->sysnamecount; i++)
 256                 seq_printf(m, " %s", np->sysname[i]);
 257         } else {
 258             seq_printf(m, " <no sysname list>");
 259         }
 260
 261     } else if (tu->exporter) {
 262         seq_printf(m, "  Unknown exporter type %d", tu->exporter->exp_type);
 263     }
 264     seq_printf(m, "\n");
 265
 266     afs_PutUser(tu, READ_LOCK);
 267     ObtainReadLock(&afs_xuser);
 268
 269     AFS_GUNLOCK();
 270
 271     return 0;
 272 }
 273
 274 static struct seq_operations afs_unixuser_seqop = {
 275     .start = uu_start,
 276     .next  = uu_next,
 277     .stop  = uu_stop,
 278     .show  = uu_show,
 279 };
 280
 281 static int
 282 afs_unixuser_open(struct inode *inode, struct file *file)
 283 {
 284     return seq_open(file, &afs_unixuser_seqop);
 285 }
 286
 287 static struct file_operations afs_unixuser_fops = {
 288     .open    = afs_unixuser_open,
 289     .read    = seq_read,
 290     .llseek  = seq_lseek,
 291     .release = seq_release,
 292 };
 293
 294
 295 #else /* HAVE_LINUX_SEQ_FILE_H */
 296
 297 static int
 298 csdbproc_info(char *buffer, char **start, off_t offset, int length)
 299 {
 300     int len = 0;
 301     off_t pos = 0;
 302     int cnt;
 303     struct afs_q *cq, *tq;
 304     struct cell *tc;
 305     char tbuffer[16];
 306     /* 90 - 64 cellname, 10 for 32 bit num and index, plus
 307        decor */
 308     char temp[91];
 309     afs_uint32 addr;
 310
 311     AFS_GLOCK();
 312
 313     ObtainReadLock(&afs_xcell);
 314
 315     for (cq = CellLRU.next; cq != &CellLRU; cq = tq) {
 316         tc = QTOC(cq); tq = QNext(cq);
 317
 318         pos += 90;
 319
 320         if (pos <= offset) {
 321             len = 0;
 322         } else {
 323             sprintf(temp, ">%s #(%d/%d)\n", tc->cellName,
 324                     tc->cellNum, tc->cellIndex);
 325             sprintf(buffer + len, "%-89s\n", temp);
 326             len += 90;
 327             if (pos >= offset+length) {
 328                 ReleaseReadLock(&afs_xcell);
 329                 goto done;
 330             }
 331         }
 332
 333         for (cnt = 0; cnt < AFS_MAXCELLHOSTS; cnt++) {
 334             if (!tc->cellHosts[cnt]) break;
 335             pos += 90;
 336             if (pos <= offset) {
 337                 len = 0;
 338             } else {
 339                 addr = ntohl(tc->cellHosts[cnt]->addr->sa_ip);
 340                 sprintf(tbuffer, "%d.%d.%d.%d",
 341                         (int)((addr>>24) & 0xff),
 342 (int)((addr>>16) & 0xff),
 343                         (int)((addr>>8)  & 0xff), (int)( addr & 0xff));
 344                 sprintf(temp, "%s #%s\n", tbuffer, tbuffer);
 345                 sprintf(buffer + len, "%-89s\n", temp);
 346                 len += 90;
 347                 if (pos >= offset+length) {
 348                     ReleaseReadLock(&afs_xcell);
 349                     goto done;
 350                 }
 351             }
 352         }
 353     }
 354
 355     ReleaseReadLock(&afs_xcell);
 356
 357 done:
 358     AFS_GUNLOCK();
 359
 360     *start = buffer + len - (pos - offset);
 361     len = pos - offset;
 362     if (len > length)
 363         len = length;
 364     return len;
 365 }
 366
 367 #endif /* HAVE_LINUX_SEQ_FILE_H */
 368
 369 void
 370 osi_proc_init(void)
 371 {
 372     struct proc_dir_entry *entry;
 373 #if !defined(EXPORTED_PROC_ROOT_FS)
 374     char path[64];
 375 #endif
 376
 377 #if defined(EXPORTED_PROC_ROOT_FS)
 378     openafs_procfs = proc_mkdir(PROC_FSDIRNAME, proc_root_fs);
 379 #else
 380     sprintf(path, "fs/%s", PROC_FSDIRNAME);
 381     openafs_procfs = proc_mkdir(path, NULL);
 382 #endif
 383 #ifdef HAVE_LINUX_SEQ_FILE_H
 384     entry = afs_proc_create("unixusers", 0, openafs_procfs, &afs_unixuser_fops);
 385 # if defined(STRUCT_PROC_DIR_ENTRY_HAS_OWNER)
 386     if (entry)
 387         entry->owner = THIS_MODULE;
 388 # endif
 389     entry = afs_proc_create(PROC_CELLSERVDB_NAME, 0, openafs_procfs, &afs_csdb_operations);
 390 #else
 391     entry = create_proc_info_entry(PROC_CELLSERVDB_NAME, (S_IFREG|S_IRUGO), openafs_procfs, csdbproc_info);
 392 #endif
 393 #if defined(STRUCT_PROC_DIR_ENTRY_HAS_OWNER)
 394     if (entry)
 395         entry->owner = THIS_MODULE;
 396 #endif
 397 }
 398
 399 void
 400 osi_proc_clean(void)
 401 {
 402 #if !defined(EXPORTED_PROC_ROOT_FS)
 403     char path[64];
 404 #endif
 405
 406     remove_proc_entry(PROC_CELLSERVDB_NAME, openafs_procfs);
 407 #ifdef HAVE_LINUX_SEQ_FILE_H
 408     remove_proc_entry("unixusers", openafs_procfs);
 409 #endif
 410 #if defined(EXPORTED_PROC_ROOT_FS)
 411     remove_proc_entry(PROC_FSDIRNAME, proc_root_fs);
 412 #else
 413     sprintf(path, "fs/%s", PROC_FSDIRNAME);
 414     remove_proc_entry(path, NULL);
 415 #endif
 416 }