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/queue.h>
  32 #include <sys/blist.h>
  33 #include <sys/conf.h>
  34 #include <sys/exec.h>
  35 #include <sys/filedesc.h>
  36 #include <sys/kernel.h>
  37 #include <sys/linker.h>
  38 #include <sys/malloc.h>
  39 #include <sys/mount.h>
  40 #include <sys/mutex.h>
  41 #include <sys/proc.h>
  42 #include <sys/resourcevar.h>
  43 #include <sys/sbuf.h>
  44 #include <sys/smp.h>
  45 #include <sys/socket.h>
  46 #include <sys/vnode.h>
  47 #include <sys/bus.h>
  48 #include <sys/pciio.h>
  49
  50 #include <dev/pci/pcivar.h>
  51 #include <dev/pci/pcireg.h>
  52
  53 #include <net/if.h>
  54
  55 #include <vm/vm.h>
  56 #include <vm/pmap.h>
  57 #include <vm/vm_map.h>
  58 #include <vm/vm_param.h>
  59 #include <vm/vm_object.h>
  60 #include <vm/swap_pager.h>
  61
  62 #include <machine/bus.h>
  63
  64 #include "opt_compat.h"
  65 #ifdef COMPAT_LINUX32                           /* XXX */
  66 #include <machine/../linux32/linux.h>
  67 #else
  68 #include <machine/../linux/linux.h>
  69 #endif
  70 #include <compat/linux/linux_ioctl.h>
  71 #include <compat/linux/linux_mib.h>
  72 #include <compat/linux/linux_util.h>
  73 #include <fs/pseudofs/pseudofs.h>
  74
  75 struct scsi_host_queue {
  76         TAILQ_ENTRY(scsi_host_queue) scsi_host_next;
  77         char *path;
  78         char *name;
  79 };
  80
  81 TAILQ_HEAD(,scsi_host_queue) scsi_host_q;
  82
  83 static int host_number = 0;
  84
  85 static int
  86 atoi(const char *str)
  87 {
  88         return (int)strtol(str, (char **)NULL, 10);
  89 }
  90
  91 /*
  92  * Filler function for proc_name
  93  */
  94 static int
  95 linsysfs_scsiname(PFS_FILL_ARGS)
  96 {
  97         struct scsi_host_queue *scsi_host;
  98         int index;
  99
 100         if (strncmp(pn->pn_parent->pn_name, "host", 4) == 0) {
 101                 index = atoi(&pn->pn_parent->pn_name[4]);
 102         } else {
 103                 sbuf_printf(sb, "unknown\n");
 104                 return (0);
 105         }
 106         TAILQ_FOREACH(scsi_host, &scsi_host_q, scsi_host_next) {
 107                 if (index-- == 0) {
 108                         sbuf_printf(sb, "%s\n", scsi_host->name);
 109                         return (0);
 110                 }
 111         }
 112         sbuf_printf(sb, "unknown\n");
 113         return (0);
 114 }
 115
 116 /*
 117  * Filler function for device sym-link
 118  */
 119 static int
 120 linsysfs_link_scsi_host(PFS_FILL_ARGS)
 121 {
 122         struct scsi_host_queue *scsi_host;
 123         int index;
 124
 125         if (strncmp(pn->pn_parent->pn_name, "host", 4) == 0) {
 126                 index = atoi(&pn->pn_parent->pn_name[4]);
 127         } else {
 128                 sbuf_printf(sb, "unknown\n");
 129                 return (0);
 130         }
 131         TAILQ_FOREACH(scsi_host, &scsi_host_q, scsi_host_next) {
 132                 if (index-- == 0) {
 133                         sbuf_printf(sb, "../../../devices%s", scsi_host->path);
 134                         return(0);
 135                 }
 136         }
 137         sbuf_printf(sb, "unknown\n");
 138         return (0);
 139 }
 140
 141 #define PCI_DEV "pci"
 142 static int
 143 linsysfs_run_bus(device_t dev, struct pfs_node *dir, struct pfs_node *scsi, char *path,
 144    char *prefix)
 145 {
 146         struct scsi_host_queue *scsi_host;
 147         struct pfs_node *sub_dir;
 148         int i, nchildren;
 149         device_t *children, parent;
 150         devclass_t devclass;
 151         const char *name = NULL;
 152         struct pci_devinfo *dinfo;
 153         char *device, *host, *new_path = path;
 154
 155         parent = device_get_parent(dev);
 156         if (parent) {
 157                 devclass = device_get_devclass(parent);
 158                 if (devclass != NULL)
 159                         name = devclass_get_name(devclass);
 160                 if (name && strcmp(name, PCI_DEV) == 0) {
 161                         dinfo = device_get_ivars(dev);
 162                         if (dinfo) {
 163                                 device = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
 164                                 new_path = malloc(MAXPATHLEN, M_TEMP,
 165                                     M_WAITOK);
 166                                 new_path[0] = '\000';
 167                                 strcpy(new_path, path);
 168                                 host = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
 169                                 device[0] = '\000';
 170                                 sprintf(device, "%s:%02x:%02x.%x",
 171                                     prefix,
 172                                     dinfo->cfg.bus,
 173                                     dinfo->cfg.slot,
 174                                     dinfo->cfg.func);
 175                                 strcat(new_path, "/");
 176                                 strcat(new_path, device);
 177                                 dir = pfs_create_dir(dir, device,
 178                                     NULL, NULL, NULL, 0);
 179
 180                                 if (dinfo->cfg.baseclass == PCIC_STORAGE) {
 181                                         /* DJA only make this if needed */
 182                                         sprintf(host, "host%d", host_number++);
 183                                         strcat(new_path, "/");
 184                                         strcat(new_path, host);
 185                                         pfs_create_dir(dir, host,
 186                                             NULL, NULL, NULL, 0);
 187                                         scsi_host = malloc(sizeof(
 188                                             struct scsi_host_queue),
 189                                             M_DEVBUF, M_NOWAIT);
 190                                         scsi_host->path = malloc(
 191                                             strlen(new_path) + 1,
 192                                             M_DEVBUF, M_NOWAIT);
 193                                         scsi_host->path[0] = '\000';
 194                                         bcopy(new_path, scsi_host->path,
 195                                             strlen(new_path) + 1);
 196                                         scsi_host->name = "unknown";
 197
 198                                         sub_dir = pfs_create_dir(scsi, host,
 199                                             NULL, NULL, NULL, 0);
 200                                         pfs_create_link(sub_dir, "device",
 201                                             &linsysfs_link_scsi_host,
 202                                             NULL, NULL, NULL, 0);
 203                                         pfs_create_file(sub_dir, "proc_name",
 204                                             &linsysfs_scsiname,
 205                                             NULL, NULL, NULL, PFS_RD);
 206                                         scsi_host->name
 207                                             = linux_driver_get_name_dev(dev);
 208                                         TAILQ_INSERT_TAIL(&scsi_host_q,
 209                                             scsi_host, scsi_host_next);
 210                                 }
 211                                 free(device, M_TEMP);
 212                                 free(host, M_TEMP);
 213                         }
 214                 }
 215         }
 216
 217         device_get_children(dev, &children, &nchildren);
 218         for (i = 0; i < nchildren; i++) {
 219                 if (children[i])
 220                         linsysfs_run_bus(children[i], dir, scsi, new_path, prefix);
 221         }
 222         if (new_path != path)
 223                 free(new_path, M_TEMP);
 224
 225         return (1);
 226 }
 227
 228 /*
 229  * Constructor
 230  */
 231 static int
 232 linsysfs_init(PFS_INIT_ARGS)
 233 {
 234         struct pfs_node *root;
 235         struct pfs_node *dir;
 236         struct pfs_node *pci;
 237         struct pfs_node *scsi;
 238         devclass_t devclass;
 239         device_t dev;
 240
 241         TAILQ_INIT(&scsi_host_q);
 242
 243         root = pi->pi_root;
 244
 245         /* /sys/class/... */
 246         scsi = pfs_create_dir(root, "class", NULL, NULL, NULL, 0);
 247         scsi = pfs_create_dir(scsi, "scsi_host", NULL, NULL, NULL, 0);
 248
 249         /* /sys/device */
 250         dir = pfs_create_dir(root, "devices", NULL, NULL, NULL, 0);
 251
 252         /* /sys/device/pci0000:00 */
 253         pci = pfs_create_dir(dir, "pci0000:00", NULL, NULL, NULL, 0);
 254
 255         devclass = devclass_find("root");
 256         if (devclass == NULL) {
 257                 return (0);
 258         }
 259
 260         dev = devclass_get_device(devclass, 0);
 261         linsysfs_run_bus(dev, pci, scsi, "/pci0000:00", "0000");
 262         return (0);
 263 }
 264
 265 /*
 266  * Destructor
 267  */
 268 static int
 269 linsysfs_uninit(PFS_INIT_ARGS)
 270 {
 271         struct scsi_host_queue *scsi_host, *scsi_host_tmp;
 272
 273         TAILQ_FOREACH_SAFE(scsi_host, &scsi_host_q, scsi_host_next,
 274             scsi_host_tmp) {
 275                 TAILQ_REMOVE(&scsi_host_q, scsi_host, scsi_host_next);
 276                 free(scsi_host->path, M_TEMP);
 277                 free(scsi_host, M_TEMP);
 278         }
 279
 280         return (0);
 281 }
 282
 283 PSEUDOFS(linsysfs, 1, 0);
 284 MODULE_DEPEND(linsysfs, linux, 1, 1, 1);