1 /* $NetBSD: procfs_linux.c,v 1.29 2006/10/27 16:49:01 christos Exp $ */ 2 3 /* 4 * Copyright (c) 2001 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Frank van der Linden for Wasabi Systems, Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed for the NetBSD Project by 20 * Wasabi Systems, Inc. 21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 #include <sys/cdefs.h> 39 __KERNEL_RCSID(0, "$NetBSD: procfs_linux.c,v 1.29 2006/10/27 16:49:01 christos Exp $"); 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/time.h> 44 #include <sys/kernel.h> 45 #include <sys/proc.h> 46 #include <sys/vnode.h> 47 #include <sys/exec.h> 48 #include <sys/resource.h> 49 #include <sys/resourcevar.h> 50 #include <sys/signal.h> 51 #include <sys/signalvar.h> 52 #include <sys/tty.h> 53 #include <sys/malloc.h> 54 #include <sys/mount.h> 55 #include <sys/conf.h> 56 57 #include <miscfs/procfs/procfs.h> 58 #include <compat/linux/common/linux_exec.h> 59 60 #include <uvm/uvm_extern.h> 61 #include <uvm/uvm.h> 62 63 extern struct devsw_conv *devsw_conv; 64 extern int max_devsw_convs; 65 66 #define PGTOB(p) ((unsigned long)(p) << PAGE_SHIFT) 67 #define PGTOKB(p) ((unsigned long)(p) << (PAGE_SHIFT - 10)) 68 69 #define LBFSZ (8 * 1024) 70 71 /* 72 * Linux compatible /proc/meminfo. Only active when the -o linux 73 * mountflag is used. 74 */ 75 int 76 procfs_domeminfo(struct lwp *curl __unused, struct proc *p __unused, 77 struct pfsnode *pfs __unused, struct uio *uio) 78 { 79 char *bf; 80 int len; 81 int error = 0; 82 83 bf = malloc(LBFSZ, M_TEMP, M_WAITOK); 84 85 len = snprintf(bf, LBFSZ, 86 " total: used: free: shared: buffers: cached:\n" 87 "Mem: %8lu %8lu %8lu %8lu %8lu %8lu\n" 88 "Swap: %8lu %8lu %8lu\n" 89 "MemTotal: %8lu kB\n" 90 "MemFree: %8lu kB\n" 91 "MemShared: %8lu kB\n" 92 "Buffers: %8lu kB\n" 93 "Cached: %8lu kB\n" 94 "SwapTotal: %8lu kB\n" 95 "SwapFree: %8lu kB\n", 96 PGTOB(uvmexp.npages), 97 PGTOB(uvmexp.npages - uvmexp.free), 98 PGTOB(uvmexp.free), 99 0L, 100 PGTOB(uvmexp.filepages), 101 PGTOB(uvmexp.anonpages + uvmexp.filepages + uvmexp.execpages), 102 PGTOB(uvmexp.swpages), 103 PGTOB(uvmexp.swpginuse), 104 PGTOB(uvmexp.swpages - uvmexp.swpginuse), 105 PGTOKB(uvmexp.npages), 106 PGTOKB(uvmexp.free), 107 0L, 108 PGTOKB(uvmexp.filepages), 109 PGTOKB(uvmexp.anonpages + uvmexp.filepages + uvmexp.execpages), 110 PGTOKB(uvmexp.swpages), 111 PGTOKB(uvmexp.swpages - uvmexp.swpginuse)); 112 113 if (len == 0) 114 goto out; 115 116 error = uiomove_frombuf(bf, len, uio); 117 out: 118 free(bf, M_TEMP); 119 return error; 120 } 121 122 /* 123 * Linux compatible /proc/devices. Only active when the -o linux 124 * mountflag is used. 125 */ 126 int 127 procfs_dodevices(struct lwp *curl __unused, struct proc *p __unused, 128 struct pfsnode *pfs __unused, struct uio *uio) 129 { 130 char *bf; 131 int offset = 0; 132 int i, error = ENAMETOOLONG; 133 134 bf = malloc(LBFSZ, M_TEMP, M_WAITOK); 135 136 offset += snprintf(&bf[offset], LBFSZ - offset, "Character devices:\n"); 137 if (offset >= LBFSZ) 138 goto out; 139 140 for (i = 0; i < max_devsw_convs; i++) { 141 if ((devsw_conv[i].d_name == NULL) || 142 (devsw_conv[i].d_cmajor == -1)) 143 continue; 144 145 offset += snprintf(&bf[offset], LBFSZ - offset, 146 "%3d %s\n", devsw_conv[i].d_cmajor, devsw_conv[i].d_name); 147 if (offset >= LBFSZ) 148 goto out; 149 } 150 151 offset += snprintf(&bf[offset], LBFSZ - offset, "\nBlock devices:\n"); 152 if (offset >= LBFSZ) 153 goto out; 154 155 for (i = 0; i < max_devsw_convs; i++) { 156 if ((devsw_conv[i].d_name == NULL) || 157 (devsw_conv[i].d_bmajor == -1)) 158 continue; 159 160 offset += snprintf(&bf[offset], LBFSZ - offset, 161 "%3d %s\n", devsw_conv[i].d_bmajor, devsw_conv[i].d_name); 162 if (offset >= LBFSZ) 163 goto out; 164 } 165 166 error = uiomove_frombuf(bf, offset, uio); 167 out: 168 free(bf, M_TEMP); 169 return error; 170 } 171 172 /* 173 * Linux compatible /proc/<pid>/stat. Only active when the -o linux 174 * mountflag is used. 175 */ 176 int 177 procfs_do_pid_stat(struct lwp *curl __unused, struct lwp *l, 178 struct pfsnode *pfs __unused, struct uio *uio) 179 { 180 char *bf; 181 struct proc *p = l->l_proc; 182 int len; 183 struct tty *tty = p->p_session->s_ttyp; 184 struct rusage *ru = &p->p_stats->p_ru; 185 struct rusage *cru = &p->p_stats->p_cru; 186 struct vm_map *map = &p->p_vmspace->vm_map; 187 struct vm_map_entry *entry; 188 unsigned long stext = 0, etext = 0, sstack = 0; 189 int error = 0; 190 191 bf = malloc(LBFSZ, M_TEMP, M_WAITOK); 192 193 if (map != &curproc->p_vmspace->vm_map) 194 vm_map_lock_read(map); 195 for (entry = map->header.next; entry != &map->header; 196 entry = entry->next) { 197 if (UVM_ET_ISSUBMAP(entry)) 198 continue; 199 /* assume text is the first entry */ 200 if (stext == etext) { 201 stext = entry->start; 202 etext = entry->end; 203 break; 204 } 205 } 206 #ifdef LINUX_USRSTACK 207 if (strcmp(p->p_emul->e_name, "linux") == 0 && 208 LINUX_USRSTACK < USRSTACK) 209 sstack = (unsigned long) LINUX_USRSTACK; 210 else 211 #endif 212 sstack = (unsigned long) USRSTACK; 213 214 if (map != &curproc->p_vmspace->vm_map) 215 vm_map_unlock_read(map); 216 217 len = snprintf(bf, LBFSZ, 218 "%d (%s) %c %d %d %d %d %d " 219 "%u " 220 "%lu %lu %lu %lu %lu %lu %lu %lu " 221 "%d %d %d " 222 "%lu %lu %lu %lu %" PRIu64 " " 223 "%lu %lu %lu " 224 "%u %u " 225 "%u %u %u %u " 226 "%lu %lu %lu %d %d\n", 227 228 p->p_pid, 229 p->p_comm, 230 "0IR3SZD"[(p->p_stat > 6) ? 0 : (int)p->p_stat], 231 (p->p_pptr != NULL) ? p->p_pptr->p_pid : 0, 232 233 p->p_pgid, 234 p->p_session->s_sid, 235 tty ? tty->t_dev : 0, 236 (tty && tty->t_pgrp) ? tty->t_pgrp->pg_id : 0, 237 238 p->p_flag, 239 240 ru->ru_minflt, 241 cru->ru_minflt, 242 ru->ru_majflt, 243 cru->ru_majflt, 244 ru->ru_utime.tv_sec, 245 ru->ru_stime.tv_sec, 246 cru->ru_utime.tv_sec, 247 cru->ru_stime.tv_sec, 248 249 p->p_nice, /* XXX: priority */ 250 p->p_nice, 251 0, 252 253 p->p_rtime.tv_sec, 254 p->p_stats->p_start.tv_sec, 255 ru->ru_ixrss + ru->ru_idrss + ru->ru_isrss, 256 ru->ru_maxrss, 257 p->p_rlimit[RLIMIT_RSS].rlim_cur, 258 259 stext, /* start code */ 260 etext, /* end code */ 261 sstack, /* mm start stack */ 262 0, /* XXX: pc */ 263 0, /* XXX: sp */ 264 p->p_sigctx.ps_siglist.__bits[0], /* pending */ 265 p->p_sigctx.ps_sigmask.__bits[0], /* blocked */ 266 p->p_sigctx.ps_sigignore.__bits[0], /* ignored */ 267 p->p_sigctx.ps_sigcatch.__bits[0], /* caught */ 268 269 (unsigned long)(intptr_t)l->l_wchan, 270 ru->ru_nvcsw, 271 ru->ru_nivcsw, 272 p->p_exitsig, 273 0); /* XXX: processor */ 274 275 if (len == 0) 276 goto out; 277 278 error = uiomove_frombuf(bf, len, uio); 279 out: 280 free(bf, M_TEMP); 281 return error; 282 } 283 284 int 285 procfs_docpuinfo(struct lwp *curl __unused, struct proc *p __unused, 286 struct pfsnode *pfs __unused, struct uio *uio) 287 { 288 int len = LBFSZ; 289 char *bf = malloc(len, M_TEMP, M_WAITOK); 290 int error; 291 292 if (procfs_getcpuinfstr(bf, &len) < 0) { 293 error = ENOSPC; 294 goto done; 295 } 296 297 if (len == 0) { 298 error = 0; 299 goto done; 300 } 301 302 error = uiomove_frombuf(bf, len, uio); 303 done: 304 free(bf, M_TEMP); 305 return error; 306 } 307 308 int 309 procfs_douptime(struct lwp *curl __unused, struct proc *p __unused, 310 struct pfsnode *pfs __unused, struct uio *uio) 311 { 312 char *bf; 313 int len; 314 struct timeval runtime; 315 u_int64_t idle; 316 int error = 0; 317 318 bf = malloc(LBFSZ, M_TEMP, M_WAITOK); 319 320 timersub(&curcpu()->ci_schedstate.spc_runtime, &boottime, &runtime); 321 idle = curcpu()->ci_schedstate.spc_cp_time[CP_IDLE]; 322 len = snprintf(bf, LBFSZ, 323 "%lu.%02lu %" PRIu64 ".%02" PRIu64 "\n", 324 runtime.tv_sec, runtime.tv_usec / 10000, 325 idle / hz, (((idle % hz) * 100) / hz) % 100); 326 327 if (len == 0) 328 goto out; 329 330 error = uiomove_frombuf(bf, len, uio); 331 out: 332 free(bf, M_TEMP); 333 return error; 334 } 335 336 int 337 procfs_domounts(struct lwp *curl __unused, struct proc *p __unused, 338 struct pfsnode *pfs __unused, struct uio *uio) 339 { 340 char *bf, *mtab = NULL; 341 const char *fsname; 342 size_t len, mtabsz = 0; 343 struct mount *mp, *nmp; 344 struct statvfs *sfs; 345 int error = 0; 346 347 bf = malloc(LBFSZ, M_TEMP, M_WAITOK); 348 simple_lock(&mountlist_slock); 349 for (mp = CIRCLEQ_FIRST(&mountlist); mp != (void *)&mountlist; 350 mp = nmp) { 351 if (vfs_busy(mp, LK_NOWAIT, &mountlist_slock)) { 352 nmp = CIRCLEQ_NEXT(mp, mnt_list); 353 continue; 354 } 355 356 sfs = &mp->mnt_stat; 357 358 /* Linux uses different names for some filesystems */ 359 fsname = sfs->f_fstypename; 360 if (strcmp(fsname, "procfs") == 0) 361 fsname = "proc"; 362 else if (strcmp(fsname, "ext2fs") == 0) 363 fsname = "ext2"; 364 365 len = snprintf(bf, LBFSZ, "%s %s %s %s%s%s%s%s%s 0 0\n", 366 sfs->f_mntfromname, 367 sfs->f_mntonname, 368 fsname, 369 (mp->mnt_flag & MNT_RDONLY) ? "ro" : "rw", 370 (mp->mnt_flag & MNT_NOSUID) ? ",nosuid" : "", 371 (mp->mnt_flag & MNT_NOEXEC) ? ",noexec" : "", 372 (mp->mnt_flag & MNT_NODEV) ? ",nodev" : "", 373 (mp->mnt_flag & MNT_SYNCHRONOUS) ? ",sync" : "", 374 (mp->mnt_flag & MNT_NOATIME) ? ",noatime" : "" 375 ); 376 377 mtab = realloc(mtab, mtabsz + len, M_TEMP, M_WAITOK); 378 memcpy(mtab + mtabsz, bf, len); 379 mtabsz += len; 380 381 simple_lock(&mountlist_slock); 382 nmp = CIRCLEQ_NEXT(mp, mnt_list); 383 vfs_unbusy(mp); 384 } 385 simple_unlock(&mountlist_slock); 386 free(bf, M_TEMP); 387 388 if (mtabsz > 0) { 389 error = uiomove_frombuf(mtab, mtabsz, uio); 390 free(mtab, M_TEMP); 391 } 392 393 return error; 394 } 395