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 <compat/linux/linux_ioctl.h>
  65 #include <compat/linux/linux_mib.h>
  66 #include <compat/linux/linux_util.h>
  67 #include <fs/pseudofs/pseudofs.h>
  68
  69 struct scsi_host_queue {
  70         TAILQ_ENTRY(scsi_host_queue) scsi_host_next;
  71         char *path;
  72         char *name;
  73 };
  74
  75 TAILQ_HEAD(,scsi_host_queue) scsi_host_q;
  76
  77 static int host_number = 0;
  78
  79 static int
  80 atoi(const char *str)
  81 {
  82         return (int)strtol(str, (char **)NULL, 10);
  83 }
  84
  85 /*
  86  * Filler function for proc_name
  87  */
  88 static int
  89 linsysfs_scsiname(PFS_FILL_ARGS)
  90 {
  91         struct scsi_host_queue *scsi_host;
  92         int index;
  93
  94         if (strncmp(pn->pn_parent->pn_name, "host", 4) == 0) {
  95                 index = atoi(&pn->pn_parent->pn_name[4]);
  96         } else {
  97                 sbuf_printf(sb, "unknown\n");
  98                 return (0);
  99         }
 100         TAILQ_FOREACH(scsi_host, &scsi_host_q, scsi_host_next) {
 101                 if (index-- == 0) {
 102                         sbuf_printf(sb, "%s\n", scsi_host->name);
 103                         return (0);
 104                 }
 105         }
 106         sbuf_printf(sb, "unknown\n");
 107         return (0);
 108 }
 109
 110 /*
 111  * Filler function for device sym-link
 112  */
 113 static int
 114 linsysfs_link_scsi_host(PFS_FILL_ARGS)
 115 {
 116         struct scsi_host_queue *scsi_host;
 117         int index;
 118
 119         if (strncmp(pn->pn_parent->pn_name, "host", 4) == 0) {
 120                 index = atoi(&pn->pn_parent->pn_name[4]);
 121         } else {
 122                 sbuf_printf(sb, "unknown\n");
 123                 return (0);
 124         }
 125         TAILQ_FOREACH(scsi_host, &scsi_host_q, scsi_host_next) {
 126                 if (index-- == 0) {
 127                         sbuf_printf(sb, "../../../devices%s", scsi_host->path);
 128                         return(0);
 129                 }
 130         }
 131         sbuf_printf(sb, "unknown\n");
 132         return (0);
 133 }
 134
 135 #define PCI_DEV "pci"
 136 static int
 137 linsysfs_run_bus(device_t dev, struct pfs_node *dir, struct pfs_node *scsi, char *path,
 138    char *prefix)
 139 {
 140         struct scsi_host_queue *scsi_host;
 141         struct pfs_node *sub_dir;
 142         int i, nchildren;
 143         device_t *children, parent;
 144         devclass_t devclass;
 145         const char *name = NULL;
 146         struct pci_devinfo *dinfo;
 147         char *device, *host, *new_path = path;
 148
 149         parent = device_get_parent(dev);
 150         if (parent) {
 151                 devclass = device_get_devclass(parent);
 152                 if (devclass != NULL)
 153                         name = devclass_get_name(devclass);
 154                 if (name && strcmp(name, PCI_DEV) == 0) {
 155                         dinfo = device_get_ivars(dev);
 156                         if (dinfo) {
 157                                 device = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
 158                                 new_path = malloc(MAXPATHLEN, M_TEMP,
 159                                     M_WAITOK);
 160                                 new_path[0] = '\000';
 161                                 strcpy(new_path, path);
 162                                 host = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
 163                                 device[0] = '\000';
 164                                 sprintf(device, "%s:%02x:%02x.%x",
 165                                     prefix,
 166                                     dinfo->cfg.bus,
 167                                     dinfo->cfg.slot,
 168                                     dinfo->cfg.func);
 169                                 strcat(new_path, "/");
 170                                 strcat(new_path, device);
 171                                 dir = pfs_create_dir(dir, device,
 172                                     NULL, NULL, NULL, 0);
 173
 174                                 if (dinfo->cfg.baseclass == PCIC_STORAGE) {
 175                                         /* DJA only make this if needed */
 176                                         sprintf(host, "host%d", host_number++);
 177                                         strcat(new_path, "/");
 178                                         strcat(new_path, host);
 179                                         pfs_create_dir(dir, host,
 180                                             NULL, NULL, NULL, 0);
 181                                         scsi_host = malloc(sizeof(
 182                                             struct scsi_host_queue),
 183                                             M_DEVBUF, M_NOWAIT);
 184                                         scsi_host->path = malloc(
 185                                             strlen(new_path) + 1,
 186                                             M_DEVBUF, M_NOWAIT);
 187                                         scsi_host->path[0] = '\000';
 188                                         bcopy(new_path, scsi_host->path,
 189                                             strlen(new_path) + 1);
 190                                         scsi_host->name = "unknown";
 191
 192                                         sub_dir = pfs_create_dir(scsi, host,
 193                                             NULL, NULL, NULL, 0);
 194                                         pfs_create_link(sub_dir, "device",
 195                                             &linsysfs_link_scsi_host,
 196                                             NULL, NULL, NULL, 0);
 197                                         pfs_create_file(sub_dir, "proc_name",
 198                                             &linsysfs_scsiname,
 199                                             NULL, NULL, NULL, PFS_RD);
 200                                         scsi_host->name
 201                                             = linux_driver_get_name_dev(dev);
 202                                         TAILQ_INSERT_TAIL(&scsi_host_q,
 203                                             scsi_host, scsi_host_next);
 204                                 }
 205                                 free(device, M_TEMP);
 206                                 free(host, M_TEMP);
 207                         }
 208                 }
 209         }
 210
 211         device_get_children(dev, &children, &nchildren);
 212         for (i = 0; i < nchildren; i++) {
 213                 if (children[i])
 214                         linsysfs_run_bus(children[i], dir, scsi, new_path, prefix);
 215         }
 216         if (new_path != path)
 217                 free(new_path, M_TEMP);
 218
 219         return (1);
 220 }
 221
 222 /*
 223  * Constructor
 224  */
 225 static int
 226 linsysfs_init(PFS_INIT_ARGS)
 227 {
 228         struct pfs_node *root;
 229         struct pfs_node *dir;
 230         struct pfs_node *pci;
 231         struct pfs_node *scsi;
 232         devclass_t devclass;
 233         device_t dev;
 234
 235         TAILQ_INIT(&scsi_host_q);
 236
 237         root = pi->pi_root;
 238
 239         /* /sys/class/... */
 240         scsi = pfs_create_dir(root, "class", NULL, NULL, NULL, 0);
 241         scsi = pfs_create_dir(scsi, "scsi_host", NULL, NULL, NULL, 0);
 242
 243         /* /sys/device */
 244         dir = pfs_create_dir(root, "devices", NULL, NULL, NULL, 0);
 245
 246         /* /sys/device/pci0000:00 */
 247         pci = pfs_create_dir(dir, "pci0000:00", NULL, NULL, NULL, 0);
 248
 249         devclass = devclass_find("root");
 250         if (devclass == NULL) {
 251                 return (0);
 252         }
 253
 254         dev = devclass_get_device(devclass, 0);
 255         linsysfs_run_bus(dev, pci, scsi, "/pci0000:00", "0000");
 256         return (0);
 257 }
 258
 259 /*
 260  * Destructor
 261  */
 262 static int
 263 linsysfs_uninit(PFS_INIT_ARGS)
 264 {
 265         struct scsi_host_queue *scsi_host, *scsi_host_tmp;
 266
 267         TAILQ_FOREACH_SAFE(scsi_host, &scsi_host_q, scsi_host_next,
 268             scsi_host_tmp) {
 269                 TAILQ_REMOVE(&scsi_host_q, scsi_host, scsi_host_next);
 270                 free(scsi_host->path, M_TEMP);
 271                 free(scsi_host, M_TEMP);
 272         }
 273
 274         return (0);
 275 }
 276
 277 PSEUDOFS(linsysfs, 1, PR_ALLOW_MOUNT_LINSYSFS);
 278 #if defined(__amd64__)
 279 MODULE_DEPEND(linsysfs, linux_common, 1, 1, 1);
 280 #else
 281 MODULE_DEPEND(linsysfs, linux, 1, 1, 1);
 282 #endif