sys/compat/linsysfs/linsysfs.c

   1 /*-
   2  * Copyright (c) 2006 IronPort Systems
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  */
  26
  27 #include <sys/cdefs.h>
  28 __FBSDID("$FreeBSD$");
  29
  30 #include <sys/param.h>
  31 #include <sys/systm.h>
  32 #include <sys/queue.h>
  33 #include <sys/blist.h>
  34 #include <sys/conf.h>
  35 #include <sys/exec.h>
  36 #include <sys/filedesc.h>
  37 #include <sys/kernel.h>
  38 #include <sys/linker.h>
  39 #include <sys/malloc.h>
  40 #include <sys/mount.h>
  41 #include <sys/mutex.h>
  42 #include <sys/proc.h>
  43 #include <sys/resourcevar.h>
  44 #include <sys/sbuf.h>
  45 #include <sys/smp.h>
  46 #include <sys/socket.h>
  47 #include <sys/vnode.h>
  48 #include <sys/bus.h>
  49 #include <sys/pciio.h>
  50
  51 #include <dev/pci/pcivar.h>
  52 #include <dev/pci/pcireg.h>
  53
  54 #include <net/if.h>
  55
  56 #include <vm/vm.h>
  57 #include <vm/pmap.h>
  58 #include <vm/vm_map.h>
  59 #include <vm/vm_param.h>
  60 #include <vm/vm_object.h>
  61 #include <vm/swap_pager.h>
  62
  63 #include <machine/bus.h>
  64
  65 #include <compat/linux/linux_ioctl.h>
  66 #include <compat/linux/linux_mib.h>
  67 #include <compat/linux/linux_util.h>
  68 #include <fs/pseudofs/pseudofs.h>
  69
  70 struct scsi_host_queue {
  71         TAILQ_ENTRY(scsi_host_queue) scsi_host_next;
  72         char *path;
  73         char *name;
  74 };
  75
  76 TAILQ_HEAD(,scsi_host_queue) scsi_host_q;
  77
  78 static int host_number = 0;
  79
  80 static int
  81 atoi(const char *str)
  82 {
  83         return (int)strtol(str, (char **)NULL, 10);
  84 }
  85
  86 /*
  87  * Filler function for proc_name
  88  */
  89 static int
  90 linsysfs_scsiname(PFS_FILL_ARGS)
  91 {
  92         struct scsi_host_queue *scsi_host;
  93         int index;
  94
  95         if (strncmp(pn->pn_parent->pn_name, "host", 4) == 0) {
  96                 index = atoi(&pn->pn_parent->pn_name[4]);
  97         } else {
  98                 sbuf_printf(sb, "unknown\n");
  99                 return (0);
 100         }
 101         TAILQ_FOREACH(scsi_host, &scsi_host_q, scsi_host_next) {
 102                 if (index-- == 0) {
 103                         sbuf_printf(sb, "%s\n", scsi_host->name);
 104                         return (0);
 105                 }
 106         }
 107         sbuf_printf(sb, "unknown\n");
 108         return (0);
 109 }
 110
 111 /*
 112  * Filler function for device sym-link
 113  */
 114 static int
 115 linsysfs_link_scsi_host(PFS_FILL_ARGS)
 116 {
 117         struct scsi_host_queue *scsi_host;
 118         int index;
 119
 120         if (strncmp(pn->pn_parent->pn_name, "host", 4) == 0) {
 121                 index = atoi(&pn->pn_parent->pn_name[4]);
 122         } else {
 123                 sbuf_printf(sb, "unknown\n");
 124                 return (0);
 125         }
 126         TAILQ_FOREACH(scsi_host, &scsi_host_q, scsi_host_next) {
 127                 if (index-- == 0) {
 128                         sbuf_printf(sb, "../../../devices%s", scsi_host->path);
 129                         return(0);
 130                 }
 131         }
 132         sbuf_printf(sb, "unknown\n");
 133         return (0);
 134 }
 135
 136 #define PCI_DEV "pci"
 137 static int
 138 linsysfs_run_bus(device_t dev, struct pfs_node *dir, struct pfs_node *scsi, char *path,
 139    char *prefix)
 140 {
 141         struct scsi_host_queue *scsi_host;
 142         struct pfs_node *sub_dir;
 143         int i, nchildren;
 144         device_t *children, parent;
 145         devclass_t devclass;
 146         const char *name = NULL;
 147         struct pci_devinfo *dinfo;
 148         char *device, *host, *new_path = path;
 149
 150         parent = device_get_parent(dev);
 151         if (parent) {
 152                 devclass = device_get_devclass(parent);
 153                 if (devclass != NULL)
 154                         name = devclass_get_name(devclass);
 155                 if (name && strcmp(name, PCI_DEV) == 0) {
 156                         dinfo = device_get_ivars(dev);
 157                         if (dinfo) {
 158                                 device = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
 159                                 new_path = malloc(MAXPATHLEN, M_TEMP,
 160                                     M_WAITOK);
 161                                 new_path[0] = '\000';
 162                                 strcpy(new_path, path);
 163                                 host = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
 164                                 device[0] = '\000';
 165                                 sprintf(device, "%s:%02x:%02x.%x",
 166                                     prefix,
 167                                     dinfo->cfg.bus,
 168                                     dinfo->cfg.slot,
 169                                     dinfo->cfg.func);
 170                                 strcat(new_path, "/");
 171                                 strcat(new_path, device);
 172                                 dir = pfs_create_dir(dir, device,
 173                                     NULL, NULL, NULL, 0);
 174
 175                                 if (dinfo->cfg.baseclass == PCIC_STORAGE) {
 176                                         /* DJA only make this if needed */
 177                                         sprintf(host, "host%d", host_number++);
 178                                         strcat(new_path, "/");
 179                                         strcat(new_path, host);
 180                                         pfs_create_dir(dir, host,
 181                                             NULL, NULL, NULL, 0);
 182                                         scsi_host = malloc(sizeof(
 183                                             struct scsi_host_queue),
 184                                             M_DEVBUF, M_NOWAIT);
 185                                         scsi_host->path = malloc(
 186                                             strlen(new_path) + 1,
 187                                             M_DEVBUF, M_NOWAIT);
 188                                         scsi_host->path[0] = '\000';
 189                                         bcopy(new_path, scsi_host->path,
 190                                             strlen(new_path) + 1);
 191                                         scsi_host->name = "unknown";
 192
 193                                         sub_dir = pfs_create_dir(scsi, host,
 194                                             NULL, NULL, NULL, 0);
 195                                         pfs_create_link(sub_dir, "device",
 196                                             &linsysfs_link_scsi_host,
 197                                             NULL, NULL, NULL, 0);
 198                                         pfs_create_file(sub_dir, "proc_name",
 199                                             &linsysfs_scsiname,
 200                                             NULL, NULL, NULL, PFS_RD);
 201                                         scsi_host->name
 202                                             = linux_driver_get_name_dev(dev);
 203                                         TAILQ_INSERT_TAIL(&scsi_host_q,
 204                                             scsi_host, scsi_host_next);
 205                                 }
 206                                 free(device, M_TEMP);
 207                                 free(host, M_TEMP);
 208                         }
 209                 }
 210         }
 211
 212         device_get_children(dev, &children, &nchildren);
 213         for (i = 0; i < nchildren; i++) {
 214                 if (children[i])
 215                         linsysfs_run_bus(children[i], dir, scsi, new_path, prefix);
 216         }
 217         if (new_path != path)
 218                 free(new_path, M_TEMP);
 219
 220         return (1);
 221 }
 222
 223 /*
 224  * Filler function for sys/devices/system/cpu/online
 225  */
 226 static int
 227 linsysfs_cpuonline(PFS_FILL_ARGS)
 228 {
 229
 230         sbuf_printf(sb, "%d-%d\n", CPU_FIRST(), mp_maxid);
 231         return (0);
 232 }
 233
 234 /*
 235  * Filler function for sys/devices/system/cpu/cpuX/online
 236  */
 237 static int
 238 linsysfs_cpuxonline(PFS_FILL_ARGS)
 239 {
 240
 241         sbuf_printf(sb, "1\n");
 242         return (0);
 243 }
 244
 245 static void
 246 linsysfs_listcpus(struct pfs_node *dir)
 247 {
 248         struct pfs_node *cpu;
 249         char *name;
 250         int i, count, len;
 251
 252         len = 1;
 253         count = mp_maxcpus;
 254         while (count > 10) {
 255                 count /= 10;
 256                 len++;
 257         }
 258         len += sizeof("cpu");
 259         name = malloc(len, M_TEMP, M_WAITOK);
 260
 261         for (i = 0; i < mp_ncpus; ++i) {
 262                 /* /sys/devices/system/cpu/cpuX */
 263                 sprintf(name, "cpu%d", i);
 264                 cpu = pfs_create_dir(dir, name, NULL, NULL, NULL, 0);
 265
 266                 pfs_create_file(cpu, "online", &linsysfs_cpuxonline,
 267                     NULL, NULL, NULL, PFS_RD);
 268         }
 269         free(name, M_TEMP);
 270 }
 271
 272 /*
 273  * Constructor
 274  */
 275 static int
 276 linsysfs_init(PFS_INIT_ARGS)
 277 {
 278         struct pfs_node *root;
 279         struct pfs_node *dir, *sys, *cpu;
 280         struct pfs_node *pci;
 281         struct pfs_node *scsi;
 282         devclass_t devclass;
 283         device_t dev;
 284
 285         TAILQ_INIT(&scsi_host_q);
 286
 287         root = pi->pi_root;
 288
 289         /* /sys/class/... */
 290         scsi = pfs_create_dir(root, "class", NULL, NULL, NULL, 0);
 291         scsi = pfs_create_dir(scsi, "scsi_host", NULL, NULL, NULL, 0);
 292
 293         /* /sys/devices */
 294         dir = pfs_create_dir(root, "devices", NULL, NULL, NULL, 0);
 295
 296         /* /sys/devices/pci0000:00 */
 297         pci = pfs_create_dir(dir, "pci0000:00", NULL, NULL, NULL, 0);
 298
 299         devclass = devclass_find("root");
 300         if (devclass == NULL) {
 301                 return (0);
 302         }
 303
 304         dev = devclass_get_device(devclass, 0);
 305         linsysfs_run_bus(dev, pci, scsi, "/pci0000:00", "0000");
 306
 307         /* /sys/devices/system */
 308         sys = pfs_create_dir(dir, "system", NULL, NULL, NULL, 0);
 309
 310         /* /sys/devices/system/cpu */
 311         cpu = pfs_create_dir(sys, "cpu", NULL, NULL, NULL, 0);
 312
 313         pfs_create_file(cpu, "online", &linsysfs_cpuonline,
 314             NULL, NULL, NULL, PFS_RD);
 315
 316         linsysfs_listcpus(cpu);
 317
 318         return (0);
 319 }
 320
 321 /*
 322  * Destructor
 323  */
 324 static int
 325 linsysfs_uninit(PFS_INIT_ARGS)
 326 {
 327         struct scsi_host_queue *scsi_host, *scsi_host_tmp;
 328
 329         TAILQ_FOREACH_SAFE(scsi_host, &scsi_host_q, scsi_host_next,
 330             scsi_host_tmp) {
 331                 TAILQ_REMOVE(&scsi_host_q, scsi_host, scsi_host_next);
 332                 free(scsi_host->path, M_TEMP);
 333                 free(scsi_host, M_TEMP);
 334         }
 335
 336         return (0);
 337 }
 338
 339 PSEUDOFS(linsysfs, 1, PR_ALLOW_MOUNT_LINSYSFS);
 340 #if defined(__amd64__)
 341 MODULE_DEPEND(linsysfs, linux_common, 1, 1, 1);
 342 #else
 343 MODULE_DEPEND(linsysfs, linux, 1, 1, 1);
 344 #endif