linsysfs.c revision 295951
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: stable/10/sys/compat/linsysfs/linsysfs.c 295951 2016-02-24 02:34:11Z araujo $"); 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 69struct scsi_host_queue { 70 TAILQ_ENTRY(scsi_host_queue) scsi_host_next; 71 char *path; 72 char *name; 73}; 74 75TAILQ_HEAD(,scsi_host_queue) scsi_host_q; 76 77static int host_number = 0; 78 79static int 80atoi(const char *str) 81{ 82 return (int)strtol(str, (char **)NULL, 10); 83} 84 85/* 86 * Filler function for proc_name 87 */ 88static int 89linsysfs_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 */ 113static int 114linsysfs_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" 136static int 137linsysfs_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 */ 225static int 226linsysfs_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 */ 262static int 263linsysfs_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 277PSEUDOFS(linsysfs, 1, PR_ALLOW_MOUNT_LINSYSFS); 278#if defined(__amd64__) 279MODULE_DEPEND(linsysfs, linux_common, 1, 1, 1); 280#else 281MODULE_DEPEND(linsysfs, linux, 1, 1, 1); 282#endif 283