2 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
31 * file/module function dispatcher, support, etc.
36 #include <sys/param.h>
37 #include <sys/linker.h>
38 #include <sys/module.h>
39 #include <sys/queue.h>
40 #include <sys/stdint.h>
42 #include "bootstrap.h"
44 #define MDIR_REMOVED 0x0001
45 #define MDIR_NOHINTS 0x0002
48 char *d_path; /* path of modules directory */
49 u_char *d_hints; /* content of linker.hints file */
50 int d_hintsz; /* size of hints data */
52 STAILQ_ENTRY(moduledir) d_link;
55 static int file_load(char *filename, vm_offset_t dest, struct preloaded_file **result);
56 static int file_load_dependencies(struct preloaded_file *base_mod);
57 static char * file_search(const char *name, char **extlist);
58 static struct kernel_module * file_findmodule(struct preloaded_file *fp, char *modname, struct mod_depend *verinfo);
59 static int file_havepath(const char *name);
60 static char *mod_searchmodule(char *name, struct mod_depend *verinfo);
61 static void file_insert_tail(struct preloaded_file *mp);
62 struct file_metadata* metadata_next(struct file_metadata *base_mp, int type);
63 static void moduledir_readhints(struct moduledir *mdp);
64 static void moduledir_rebuild(void);
66 /* load address should be tweaked by first module loaded (kernel) */
67 static vm_offset_t loadaddr = 0;
69 #if defined(LOADER_FDT_SUPPORT)
70 static const char *default_searchpath =
71 "/boot/kernel;/boot/modules;/boot/dtb";
73 static const char *default_searchpath ="/boot/kernel;/boot/modules";
76 static STAILQ_HEAD(, moduledir) moduledir_list = STAILQ_HEAD_INITIALIZER(moduledir_list);
78 struct preloaded_file *preloaded_files = NULL;
80 static char *kld_ext_list[] = {
89 * load an object, either a disk file or code module.
91 * To load a file, the syntax is:
93 * load -t <type> <path>
95 * code modules are loaded as:
97 * load <path> <options>
100 COMMAND_SET(load, "load", "load a kernel or module", command_load);
103 command_load(int argc, char *argv[])
105 struct preloaded_file *fp;
109 int dofile, dokld, ch, error;
116 command_errmsg = "no filename specified";
119 prefix = skip = NULL;
120 while ((ch = getopt(argc, argv, "kp:s:t:")) != -1) {
137 /* getopt has already reported an error */
141 argv += (optind - 1);
142 argc -= (optind - 1);
145 * Request to load a raw file?
148 if ((argc != 2) || (typestr == NULL) || (*typestr == 0)) {
149 command_errmsg = "invalid load type";
153 #ifdef LOADER_VERIEXEC
154 if (strncmp(typestr, "manifest", 8) == 0) {
155 return (load_manifest(argv[1], prefix, skip, NULL));
159 fp = file_findfile(argv[1], typestr);
161 snprintf(command_errbuf, sizeof(command_errbuf),
162 "warning: file '%s' already loaded", argv[1]);
166 if (file_loadraw(argv[1], typestr, 1) != NULL)
169 /* Failing to load mfs_root is never going to end well! */
170 if (strcmp("mfs_root", typestr) == 0)
176 * Do we have explicit KLD load ?
178 if (dokld || file_havepath(argv[1])) {
179 error = mod_loadkld(argv[1], argc - 2, argv + 2);
180 if (error == EEXIST) {
181 snprintf(command_errbuf, sizeof(command_errbuf),
182 "warning: KLD '%s' already loaded", argv[1]);
186 return (error == 0 ? CMD_OK : CMD_CRIT);
189 * Looks like a request for a module.
191 error = mod_load(argv[1], NULL, argc - 2, argv + 2);
192 if (error == EEXIST) {
193 snprintf(command_errbuf, sizeof(command_errbuf),
194 "warning: module '%s' already loaded", argv[1]);
198 return (error == 0 ? CMD_OK : CMD_CRIT);
201 #ifdef LOADER_GELI_SUPPORT
202 COMMAND_SET(load_geli, "load_geli", "load a geli key", command_load_geli);
205 command_load_geli(int argc, char *argv[])
212 command_errmsg = "usage is [-n key#] <prov> <file>";
219 while ((ch = getopt(argc, argv, "n:")) != -1) {
222 num = strtol(optarg, &cp, 0);
224 snprintf(command_errbuf, sizeof(command_errbuf),
225 "bad key index '%s'", optarg);
231 /* getopt has already reported an error */
235 argv += (optind - 1);
236 argc -= (optind - 1);
237 sprintf(typestr, "%s:geli_keyfile%d", argv[1], num);
238 return (file_loadraw(argv[2], typestr, 1) ? CMD_OK : CMD_ERROR);
245 struct preloaded_file *fp;
247 while (preloaded_files != NULL) {
248 fp = preloaded_files;
249 preloaded_files = preloaded_files->f_next;
253 unsetenv("kernelname");
256 COMMAND_SET(unload, "unload", "unload all modules", command_unload);
259 command_unload(int argc, char *argv[])
265 COMMAND_SET(lsmod, "lsmod", "list loaded modules", command_lsmod);
268 command_lsmod(int argc, char *argv[])
270 struct preloaded_file *fp;
271 struct kernel_module *mp;
272 struct file_metadata *md;
274 int ch, verbose, ret = 0;
279 while ((ch = getopt(argc, argv, "v")) != -1) {
286 /* getopt has already reported an error */
292 for (fp = preloaded_files; fp; fp = fp->f_next) {
293 snprintf(lbuf, sizeof(lbuf), " %p: ", (void *) fp->f_addr);
295 pager_output(fp->f_name);
296 snprintf(lbuf, sizeof(lbuf), " (%s, 0x%lx)\n", fp->f_type,
298 if (pager_output(lbuf))
300 if (fp->f_args != NULL) {
301 pager_output(" args: ");
302 pager_output(fp->f_args);
303 if (pager_output("\n"))
307 pager_output(" modules: ");
308 for (mp = fp->f_modules; mp; mp = mp->m_next) {
309 snprintf(lbuf, sizeof(lbuf), "%s.%d ", mp->m_name,
313 if (pager_output("\n"))
317 /* XXX could add some formatting smarts here to display some better */
318 for (md = fp->f_metadata; md != NULL; md = md->md_next) {
319 snprintf(lbuf, sizeof(lbuf), " 0x%04x, 0x%lx\n",
320 md->md_type, (long) md->md_size);
321 if (pager_output(lbuf))
333 * File level interface, functions file_*
336 file_load(char *filename, vm_offset_t dest, struct preloaded_file **result)
338 static int last_file_format = 0;
339 struct preloaded_file *fp;
343 if (archsw.arch_loadaddr != NULL)
344 dest = archsw.arch_loadaddr(LOAD_RAW, filename, dest);
347 for (i = last_file_format, fp = NULL;
348 file_formats[i] && fp == NULL; i++) {
349 error = (file_formats[i]->l_load)(filename, dest, &fp);
351 fp->f_loader = last_file_format = i; /* remember the loader */
354 } else if (last_file_format == i && i != 0) {
355 /* Restart from the beginning */
357 last_file_format = 0;
362 continue; /* Unknown to this handler? */
364 snprintf(command_errbuf, sizeof(command_errbuf),
365 "can't load file '%s': %s", filename, strerror(error));
373 file_load_dependencies(struct preloaded_file *base_file)
375 struct file_metadata *md;
376 struct preloaded_file *fp;
377 struct mod_depend *verinfo;
378 struct kernel_module *mp;
382 md = file_findmetadata(base_file, MODINFOMD_DEPLIST);
387 verinfo = (struct mod_depend*)md->md_data;
388 dmodname = (char *)(verinfo + 1);
389 if (file_findmodule(NULL, dmodname, verinfo) == NULL) {
390 printf("loading required module '%s'\n", dmodname);
391 error = mod_load(dmodname, verinfo, 0, NULL);
395 * If module loaded via kld name which isn't listed
396 * in the linker.hints file, we should check if it have
399 mp = file_findmodule(NULL, dmodname, verinfo);
401 snprintf(command_errbuf, sizeof(command_errbuf),
402 "module '%s' exists but with wrong version", dmodname);
407 md = metadata_next(md, MODINFOMD_DEPLIST);
411 /* Load failed; discard everything */
412 while (base_file != NULL) {
414 base_file = base_file->f_next;
421 * We've been asked to load (fname) as (type), so just suck it in,
422 * no arguments or anything.
424 struct preloaded_file *
425 file_loadraw(const char *fname, char *type, int insert)
427 struct preloaded_file *fp;
432 /* We can't load first */
433 if ((file_findfile(NULL, NULL)) == NULL) {
434 command_errmsg = "can't load file before kernel";
438 /* locate the file on the load path */
439 name = file_search(fname, NULL);
441 snprintf(command_errbuf, sizeof(command_errbuf),
442 "can't find '%s'", fname);
446 if ((fd = open(name, O_RDONLY)) < 0) {
447 snprintf(command_errbuf, sizeof(command_errbuf),
448 "can't open '%s': %s", name, strerror(errno));
453 #ifdef LOADER_VERIEXEC
454 if (verify_file(fd, name, 0, VE_MUST) < 0) {
455 sprintf(command_errbuf, "can't verify '%s'", name);
462 if (archsw.arch_loadaddr != NULL)
463 loadaddr = archsw.arch_loadaddr(LOAD_RAW, name, loadaddr);
469 /* read in 4k chunks; size is not really important */
470 got = archsw.arch_readin(fd, laddr, 4096);
471 if (got == 0) /* end of file */
473 if (got < 0) { /* error */
474 snprintf(command_errbuf, sizeof(command_errbuf),
475 "error reading '%s': %s", name, strerror(errno));
483 printf("size=%#jx\n", (uintmax_t)(laddr - loadaddr));
485 /* Looks OK so far; create & populate control structure */
487 fp->f_name = strdup(name);
488 fp->f_type = strdup(type);
490 fp->f_metadata = NULL;
492 fp->f_addr = loadaddr;
493 fp->f_size = laddr - loadaddr;
495 /* recognise space consumption */
498 /* Add to the list of loaded files */
500 file_insert_tail(fp);
506 * Load the module (name), pass it (argc),(argv), add container file
507 * to the list of loaded files.
508 * If module is already loaded just assign new argc/argv.
511 mod_load(char *modname, struct mod_depend *verinfo, int argc, char *argv[])
513 struct kernel_module *mp;
517 if (file_havepath(modname)) {
518 printf("Warning: mod_load() called instead of mod_loadkld() for module '%s'\n", modname);
519 return (mod_loadkld(modname, argc, argv));
521 /* see if module is already loaded */
522 mp = file_findmodule(NULL, modname, verinfo);
527 mp->m_args = unargv(argc, argv);
529 snprintf(command_errbuf, sizeof(command_errbuf),
530 "warning: module '%s' already loaded", mp->m_name);
533 /* locate file with the module on the search path */
534 filename = mod_searchmodule(modname, verinfo);
535 if (filename == NULL) {
536 snprintf(command_errbuf, sizeof(command_errbuf),
537 "can't find '%s'", modname);
540 err = mod_loadkld(filename, argc, argv);
545 * Load specified KLD. If path is omitted, then try to locate it via
549 mod_loadkld(const char *kldname, int argc, char *argv[])
551 struct preloaded_file *fp, *last_file;
556 * Get fully qualified KLD name
558 filename = file_search(kldname, kld_ext_list);
559 if (filename == NULL) {
560 snprintf(command_errbuf, sizeof(command_errbuf),
561 "can't find '%s'", kldname);
565 * Check if KLD already loaded
567 fp = file_findfile(filename, NULL);
569 snprintf(command_errbuf, sizeof(command_errbuf),
570 "warning: KLD '%s' already loaded", filename);
574 for (last_file = preloaded_files;
575 last_file != NULL && last_file->f_next != NULL;
576 last_file = last_file->f_next)
580 err = file_load(filename, loadaddr, &fp);
583 fp->f_args = unargv(argc, argv);
584 loadaddr = fp->f_addr + fp->f_size;
585 file_insert_tail(fp); /* Add to the list of loaded files */
586 if (file_load_dependencies(fp) != 0) {
588 last_file->f_next = NULL;
589 loadaddr = last_file->f_addr + last_file->f_size;
595 snprintf(command_errbuf, sizeof(command_errbuf),
596 "don't know how to load module '%s'", filename);
605 * Find a file matching (name) and (type).
606 * NULL may be passed as a wildcard to either.
608 struct preloaded_file *
609 file_findfile(const char *name, const char *type)
611 struct preloaded_file *fp;
613 for (fp = preloaded_files; fp != NULL; fp = fp->f_next) {
614 if (((name == NULL) || !strcmp(name, fp->f_name)) &&
615 ((type == NULL) || !strcmp(type, fp->f_type)))
622 * Find a module matching (name) inside of given file.
623 * NULL may be passed as a wildcard.
625 struct kernel_module *
626 file_findmodule(struct preloaded_file *fp, char *modname,
627 struct mod_depend *verinfo)
629 struct kernel_module *mp, *best;
633 for (fp = preloaded_files; fp; fp = fp->f_next) {
634 mp = file_findmodule(fp, modname, verinfo);
642 for (mp = fp->f_modules; mp; mp = mp->m_next) {
643 if (strcmp(modname, mp->m_name) == 0) {
646 mver = mp->m_version;
647 if (mver == verinfo->md_ver_preferred)
649 if (mver >= verinfo->md_ver_minimum &&
650 mver <= verinfo->md_ver_maximum &&
660 * Make a copy of (size) bytes of data from (p), and associate them as
661 * metadata of (type) to the module (mp).
664 file_addmetadata(struct preloaded_file *fp, int type, size_t size, void *p)
666 struct file_metadata *md;
668 md = malloc(sizeof(struct file_metadata) - sizeof(md->md_data) + size);
671 bcopy(p, md->md_data, size);
672 md->md_next = fp->f_metadata;
677 * Find a metadata object of (type) associated with the file (fp)
679 struct file_metadata *
680 file_findmetadata(struct preloaded_file *fp, int type)
682 struct file_metadata *md;
684 for (md = fp->f_metadata; md != NULL; md = md->md_next)
685 if (md->md_type == type)
691 * Remove all metadata from the file.
694 file_removemetadata(struct preloaded_file *fp)
696 struct file_metadata *md, *next;
698 for (md = fp->f_metadata; md != NULL; md = next)
703 fp->f_metadata = NULL;
706 struct file_metadata *
707 metadata_next(struct file_metadata *md, int type)
711 while((md = md->md_next) != NULL)
712 if (md->md_type == type)
717 static char *emptyextlist[] = { "", NULL };
720 * Check if the given file is in place and return full path to it.
723 file_lookup(const char *path, const char *name, int namelen, char **extlist)
726 char *result, *cp, **cpp;
727 int pathlen, extlen, len;
729 pathlen = strlen(path);
732 extlist = emptyextlist;
733 for (cpp = extlist; *cpp; cpp++) {
738 result = malloc(pathlen + namelen + extlen + 2);
741 bcopy(path, result, pathlen);
742 if (pathlen > 0 && result[pathlen - 1] != '/')
743 result[pathlen++] = '/';
744 cp = result + pathlen;
745 bcopy(name, cp, namelen);
747 for (cpp = extlist; *cpp; cpp++) {
749 if (stat(result, &st) == 0 && S_ISREG(st.st_mode))
757 * Check if file name have any qualifiers
760 file_havepath(const char *name)
764 archsw.arch_getdev(NULL, name, &cp);
765 return (cp != name || strchr(name, '/') != NULL);
769 * Attempt to find the file (name) on the module searchpath.
770 * If (name) is qualified in any way, we simply check it and
771 * return it or NULL. If it is not qualified, then we attempt
772 * to construct a path using entries in the environment variable
775 * The path we return a pointer to need never be freed, as we manage
779 file_search(const char *name, char **extlist)
781 struct moduledir *mdp;
786 /* Don't look for nothing */
791 return(strdup(name));
793 if (file_havepath(name)) {
794 /* Qualified, so just see if it exists */
795 if (stat(name, &sb) == 0)
796 return(strdup(name));
801 namelen = strlen(name);
802 STAILQ_FOREACH(mdp, &moduledir_list, d_link) {
803 result = file_lookup(mdp->d_path, name, namelen, extlist);
810 #define INT_ALIGN(base, ptr) ptr = \
811 (base) + roundup2((ptr) - (base), sizeof(int))
814 mod_search_hints(struct moduledir *mdp, const char *modname,
815 struct mod_depend *verinfo)
817 u_char *cp, *recptr, *bufend, *best;
819 int *intp, bestver, blen, clen, found, ival, modnamelen, reclen;
821 moduledir_readhints(mdp);
822 modnamelen = strlen(modname);
826 if (mdp->d_hints == NULL)
828 recptr = mdp->d_hints;
829 bufend = recptr + mdp->d_hintsz;
832 while (recptr < bufend && !found) {
840 if (clen != modnamelen || bcmp(cp, modname, clen) != 0)
843 INT_ALIGN(mdp->d_hints, cp);
847 if (verinfo == NULL || ival == verinfo->md_ver_preferred) {
851 if (ival >= verinfo->md_ver_minimum &&
852 ival <= verinfo->md_ver_maximum &&
862 recptr += reclen + sizeof(int);
865 * Finally check if KLD is in the place
868 result = file_lookup(mdp->d_path, (const char *)cp, clen, NULL);
870 result = file_lookup(mdp->d_path, (const char *)best, blen, NULL);
873 * If nothing found or hints is absent - fallback to the old way
874 * by using "kldname[.ko]" as module name.
876 if (!found && !bestver && result == NULL)
877 result = file_lookup(mdp->d_path, modname, modnamelen, kld_ext_list);
882 * Attempt to locate the file containing the module (name)
885 mod_searchmodule(char *name, struct mod_depend *verinfo)
887 struct moduledir *mdp;
892 * Now we ready to lookup module in the given directories
895 STAILQ_FOREACH(mdp, &moduledir_list, d_link) {
896 result = mod_search_hints(mdp, name, verinfo);
905 file_addmodule(struct preloaded_file *fp, char *modname, int version,
906 struct kernel_module **newmp)
908 struct kernel_module *mp;
909 struct mod_depend mdepend;
911 bzero(&mdepend, sizeof(mdepend));
912 mdepend.md_ver_preferred = version;
913 mp = file_findmodule(fp, modname, &mdepend);
916 mp = malloc(sizeof(struct kernel_module));
919 bzero(mp, sizeof(struct kernel_module));
920 mp->m_name = strdup(modname);
921 mp->m_version = version;
923 mp->m_next = fp->f_modules;
934 file_discard(struct preloaded_file *fp)
936 struct file_metadata *md, *md1;
937 struct kernel_module *mp, *mp1;
954 if (fp->f_name != NULL)
956 if (fp->f_type != NULL)
958 if (fp->f_args != NULL)
964 * Allocate a new file; must be used instead of malloc()
965 * to ensure safe initialisation.
967 struct preloaded_file *
970 struct preloaded_file *fp;
972 if ((fp = malloc(sizeof(struct preloaded_file))) != NULL) {
973 bzero(fp, sizeof(struct preloaded_file));
979 * Add a module to the chain
982 file_insert_tail(struct preloaded_file *fp)
984 struct preloaded_file *cm;
986 /* Append to list of loaded file */
988 if (preloaded_files == NULL) {
989 preloaded_files = fp;
991 for (cm = preloaded_files; cm->f_next != NULL; cm = cm->f_next)
998 moduledir_fullpath(struct moduledir *mdp, const char *fname)
1002 cp = malloc(strlen(mdp->d_path) + strlen(fname) + 2);
1005 strcpy(cp, mdp->d_path);
1012 * Read linker.hints file into memory performing some sanity checks.
1015 moduledir_readhints(struct moduledir *mdp)
1019 int fd, size, version;
1021 if (mdp->d_hints != NULL || (mdp->d_flags & MDIR_NOHINTS))
1023 path = moduledir_fullpath(mdp, "linker.hints");
1024 if (stat(path, &st) != 0 ||
1025 st.st_size < (ssize_t)(sizeof(version) + sizeof(int)) ||
1026 st.st_size > LINKER_HINTS_MAX || (fd = open(path, O_RDONLY)) < 0) {
1028 mdp->d_flags |= MDIR_NOHINTS;
1032 size = read(fd, &version, sizeof(version));
1033 if (size != sizeof(version) || version != LINKER_HINTS_VERSION)
1035 size = st.st_size - size;
1036 mdp->d_hints = malloc(size);
1037 if (mdp->d_hints == NULL)
1039 if (read(fd, mdp->d_hints, size) != size)
1041 mdp->d_hintsz = size;
1048 mdp->d_hints = NULL;
1050 mdp->d_flags |= MDIR_NOHINTS;
1055 * Extract directories from the ';' separated list, remove duplicates.
1058 moduledir_rebuild(void)
1060 struct moduledir *mdp, *mtmp;
1061 const char *path, *cp, *ep;
1064 path = getenv("module_path");
1066 path = default_searchpath;
1068 * Rebuild list of module directories if it changed
1070 STAILQ_FOREACH(mdp, &moduledir_list, d_link)
1071 mdp->d_flags |= MDIR_REMOVED;
1073 for (ep = path; *ep != 0; ep++) {
1075 for (; *ep != 0 && *ep != ';'; ep++)
1078 * Ignore trailing slashes
1080 for (cplen = ep - cp; cplen > 1 && cp[cplen - 1] == '/'; cplen--)
1082 STAILQ_FOREACH(mdp, &moduledir_list, d_link) {
1083 if (strlen(mdp->d_path) != cplen || bcmp(cp, mdp->d_path, cplen) != 0)
1085 mdp->d_flags &= ~MDIR_REMOVED;
1089 mdp = malloc(sizeof(*mdp) + cplen + 1);
1092 mdp->d_path = (char*)(mdp + 1);
1093 bcopy(cp, mdp->d_path, cplen);
1094 mdp->d_path[cplen] = 0;
1095 mdp->d_hints = NULL;
1097 STAILQ_INSERT_TAIL(&moduledir_list, mdp, d_link);
1103 * Delete unused directories if any
1105 mdp = STAILQ_FIRST(&moduledir_list);
1107 if ((mdp->d_flags & MDIR_REMOVED) == 0) {
1108 mdp = STAILQ_NEXT(mdp, d_link);
1113 mdp = STAILQ_NEXT(mdp, d_link);
1114 STAILQ_REMOVE(&moduledir_list, mtmp, moduledir, d_link);