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;
107 int dofile, dokld, ch, error;
114 command_errmsg = "no filename specified";
117 while ((ch = getopt(argc, argv, "kt:")) != -1) {
128 /* getopt has already reported an error */
132 argv += (optind - 1);
133 argc -= (optind - 1);
136 * Request to load a raw file?
139 if ((argc != 2) || (typestr == NULL) || (*typestr == 0)) {
140 command_errmsg = "invalid load type";
144 fp = file_findfile(argv[1], typestr);
146 snprintf(command_errbuf, sizeof(command_errbuf),
147 "warning: file '%s' already loaded", argv[1]);
151 if (file_loadraw(argv[1], typestr, 1) != NULL)
154 /* Failing to load mfs_root is never going to end well! */
155 if (strcmp("mfs_root", typestr) == 0)
161 * Do we have explicit KLD load ?
163 if (dokld || file_havepath(argv[1])) {
164 error = mod_loadkld(argv[1], argc - 2, argv + 2);
165 if (error == EEXIST) {
166 snprintf(command_errbuf, sizeof(command_errbuf),
167 "warning: KLD '%s' already loaded", argv[1]);
171 return (error == 0 ? CMD_OK : CMD_CRIT);
174 * Looks like a request for a module.
176 error = mod_load(argv[1], NULL, argc - 2, argv + 2);
177 if (error == EEXIST) {
178 snprintf(command_errbuf, sizeof(command_errbuf),
179 "warning: module '%s' already loaded", argv[1]);
183 return (error == 0 ? CMD_OK : CMD_CRIT);
186 #ifdef LOADER_GELI_SUPPORT
187 COMMAND_SET(load_geli, "load_geli", "load a geli key", command_load_geli);
190 command_load_geli(int argc, char *argv[])
197 command_errmsg = "usage is [-n key#] <prov> <file>";
204 while ((ch = getopt(argc, argv, "n:")) != -1) {
207 num = strtol(optarg, &cp, 0);
209 snprintf(command_errbuf, sizeof(command_errbuf),
210 "bad key index '%s'", optarg);
216 /* getopt has already reported an error */
220 argv += (optind - 1);
221 argc -= (optind - 1);
222 sprintf(typestr, "%s:geli_keyfile%d", argv[1], num);
223 return (file_loadraw(argv[2], typestr, 1) ? CMD_OK : CMD_ERROR);
230 struct preloaded_file *fp;
232 while (preloaded_files != NULL) {
233 fp = preloaded_files;
234 preloaded_files = preloaded_files->f_next;
238 unsetenv("kernelname");
241 COMMAND_SET(unload, "unload", "unload all modules", command_unload);
244 command_unload(int argc, char *argv[])
250 COMMAND_SET(lsmod, "lsmod", "list loaded modules", command_lsmod);
253 command_lsmod(int argc, char *argv[])
255 struct preloaded_file *fp;
256 struct kernel_module *mp;
257 struct file_metadata *md;
259 int ch, verbose, ret = 0;
264 while ((ch = getopt(argc, argv, "v")) != -1) {
271 /* getopt has already reported an error */
277 for (fp = preloaded_files; fp; fp = fp->f_next) {
278 snprintf(lbuf, sizeof(lbuf), " %p: ", (void *) fp->f_addr);
280 pager_output(fp->f_name);
281 snprintf(lbuf, sizeof(lbuf), " (%s, 0x%lx)\n", fp->f_type,
283 if (pager_output(lbuf))
285 if (fp->f_args != NULL) {
286 pager_output(" args: ");
287 pager_output(fp->f_args);
288 if (pager_output("\n"))
292 pager_output(" modules: ");
293 for (mp = fp->f_modules; mp; mp = mp->m_next) {
294 snprintf(lbuf, sizeof(lbuf), "%s.%d ", mp->m_name,
298 if (pager_output("\n"))
302 /* XXX could add some formatting smarts here to display some better */
303 for (md = fp->f_metadata; md != NULL; md = md->md_next) {
304 snprintf(lbuf, sizeof(lbuf), " 0x%04x, 0x%lx\n",
305 md->md_type, (long) md->md_size);
306 if (pager_output(lbuf))
318 * File level interface, functions file_*
321 file_load(char *filename, vm_offset_t dest, struct preloaded_file **result)
323 static int last_file_format = 0;
324 struct preloaded_file *fp;
328 if (archsw.arch_loadaddr != NULL)
329 dest = archsw.arch_loadaddr(LOAD_RAW, filename, dest);
332 for (i = last_file_format, fp = NULL;
333 file_formats[i] && fp == NULL; i++) {
334 error = (file_formats[i]->l_load)(filename, dest, &fp);
336 fp->f_loader = last_file_format = i; /* remember the loader */
339 } else if (last_file_format == i && i != 0) {
340 /* Restart from the beginning */
342 last_file_format = 0;
347 continue; /* Unknown to this handler? */
349 snprintf(command_errbuf, sizeof(command_errbuf),
350 "can't load file '%s': %s", filename, strerror(error));
358 file_load_dependencies(struct preloaded_file *base_file)
360 struct file_metadata *md;
361 struct preloaded_file *fp;
362 struct mod_depend *verinfo;
363 struct kernel_module *mp;
367 md = file_findmetadata(base_file, MODINFOMD_DEPLIST);
372 verinfo = (struct mod_depend*)md->md_data;
373 dmodname = (char *)(verinfo + 1);
374 if (file_findmodule(NULL, dmodname, verinfo) == NULL) {
375 printf("loading required module '%s'\n", dmodname);
376 error = mod_load(dmodname, verinfo, 0, NULL);
380 * If module loaded via kld name which isn't listed
381 * in the linker.hints file, we should check if it have
384 mp = file_findmodule(NULL, dmodname, verinfo);
386 snprintf(command_errbuf, sizeof(command_errbuf),
387 "module '%s' exists but with wrong version", dmodname);
392 md = metadata_next(md, MODINFOMD_DEPLIST);
396 /* Load failed; discard everything */
397 while (base_file != NULL) {
399 base_file = base_file->f_next;
406 * We've been asked to load (fname) as (type), so just suck it in,
407 * no arguments or anything.
409 struct preloaded_file *
410 file_loadraw(const char *fname, char *type, int insert)
412 struct preloaded_file *fp;
417 /* We can't load first */
418 if ((file_findfile(NULL, NULL)) == NULL) {
419 command_errmsg = "can't load file before kernel";
423 /* locate the file on the load path */
424 name = file_search(fname, NULL);
426 snprintf(command_errbuf, sizeof(command_errbuf),
427 "can't find '%s'", fname);
431 if ((fd = open(name, O_RDONLY)) < 0) {
432 snprintf(command_errbuf, sizeof(command_errbuf),
433 "can't open '%s': %s", name, strerror(errno));
438 if (archsw.arch_loadaddr != NULL)
439 loadaddr = archsw.arch_loadaddr(LOAD_RAW, name, loadaddr);
445 /* read in 4k chunks; size is not really important */
446 got = archsw.arch_readin(fd, laddr, 4096);
447 if (got == 0) /* end of file */
449 if (got < 0) { /* error */
450 snprintf(command_errbuf, sizeof(command_errbuf),
451 "error reading '%s': %s", name, strerror(errno));
459 printf("size=%#jx\n", (uintmax_t)(laddr - loadaddr));
461 /* Looks OK so far; create & populate control structure */
463 fp->f_name = strdup(name);
464 fp->f_type = strdup(type);
466 fp->f_metadata = NULL;
468 fp->f_addr = loadaddr;
469 fp->f_size = laddr - loadaddr;
471 /* recognise space consumption */
474 /* Add to the list of loaded files */
476 file_insert_tail(fp);
482 * Load the module (name), pass it (argc),(argv), add container file
483 * to the list of loaded files.
484 * If module is already loaded just assign new argc/argv.
487 mod_load(char *modname, struct mod_depend *verinfo, int argc, char *argv[])
489 struct kernel_module *mp;
493 if (file_havepath(modname)) {
494 printf("Warning: mod_load() called instead of mod_loadkld() for module '%s'\n", modname);
495 return (mod_loadkld(modname, argc, argv));
497 /* see if module is already loaded */
498 mp = file_findmodule(NULL, modname, verinfo);
503 mp->m_args = unargv(argc, argv);
505 snprintf(command_errbuf, sizeof(command_errbuf),
506 "warning: module '%s' already loaded", mp->m_name);
509 /* locate file with the module on the search path */
510 filename = mod_searchmodule(modname, verinfo);
511 if (filename == NULL) {
512 snprintf(command_errbuf, sizeof(command_errbuf),
513 "can't find '%s'", modname);
516 err = mod_loadkld(filename, argc, argv);
521 * Load specified KLD. If path is omitted, then try to locate it via
525 mod_loadkld(const char *kldname, int argc, char *argv[])
527 struct preloaded_file *fp, *last_file;
532 * Get fully qualified KLD name
534 filename = file_search(kldname, kld_ext_list);
535 if (filename == NULL) {
536 snprintf(command_errbuf, sizeof(command_errbuf),
537 "can't find '%s'", kldname);
541 * Check if KLD already loaded
543 fp = file_findfile(filename, NULL);
545 snprintf(command_errbuf, sizeof(command_errbuf),
546 "warning: KLD '%s' already loaded", filename);
550 for (last_file = preloaded_files;
551 last_file != NULL && last_file->f_next != NULL;
552 last_file = last_file->f_next)
556 err = file_load(filename, loadaddr, &fp);
559 fp->f_args = unargv(argc, argv);
560 loadaddr = fp->f_addr + fp->f_size;
561 file_insert_tail(fp); /* Add to the list of loaded files */
562 if (file_load_dependencies(fp) != 0) {
564 last_file->f_next = NULL;
565 loadaddr = last_file->f_addr + last_file->f_size;
571 snprintf(command_errbuf, sizeof(command_errbuf),
572 "don't know how to load module '%s'", filename);
581 * Find a file matching (name) and (type).
582 * NULL may be passed as a wildcard to either.
584 struct preloaded_file *
585 file_findfile(const char *name, const char *type)
587 struct preloaded_file *fp;
589 for (fp = preloaded_files; fp != NULL; fp = fp->f_next) {
590 if (((name == NULL) || !strcmp(name, fp->f_name)) &&
591 ((type == NULL) || !strcmp(type, fp->f_type)))
598 * Find a module matching (name) inside of given file.
599 * NULL may be passed as a wildcard.
601 struct kernel_module *
602 file_findmodule(struct preloaded_file *fp, char *modname,
603 struct mod_depend *verinfo)
605 struct kernel_module *mp, *best;
609 for (fp = preloaded_files; fp; fp = fp->f_next) {
610 mp = file_findmodule(fp, modname, verinfo);
618 for (mp = fp->f_modules; mp; mp = mp->m_next) {
619 if (strcmp(modname, mp->m_name) == 0) {
622 mver = mp->m_version;
623 if (mver == verinfo->md_ver_preferred)
625 if (mver >= verinfo->md_ver_minimum &&
626 mver <= verinfo->md_ver_maximum &&
636 * Make a copy of (size) bytes of data from (p), and associate them as
637 * metadata of (type) to the module (mp).
640 file_addmetadata(struct preloaded_file *fp, int type, size_t size, void *p)
642 struct file_metadata *md;
644 md = malloc(sizeof(struct file_metadata) - sizeof(md->md_data) + size);
647 bcopy(p, md->md_data, size);
648 md->md_next = fp->f_metadata;
653 * Find a metadata object of (type) associated with the file (fp)
655 struct file_metadata *
656 file_findmetadata(struct preloaded_file *fp, int type)
658 struct file_metadata *md;
660 for (md = fp->f_metadata; md != NULL; md = md->md_next)
661 if (md->md_type == type)
667 * Remove all metadata from the file.
670 file_removemetadata(struct preloaded_file *fp)
672 struct file_metadata *md, *next;
674 for (md = fp->f_metadata; md != NULL; md = next)
679 fp->f_metadata = NULL;
682 struct file_metadata *
683 metadata_next(struct file_metadata *md, int type)
687 while((md = md->md_next) != NULL)
688 if (md->md_type == type)
693 static char *emptyextlist[] = { "", NULL };
696 * Check if the given file is in place and return full path to it.
699 file_lookup(const char *path, const char *name, int namelen, char **extlist)
702 char *result, *cp, **cpp;
703 int pathlen, extlen, len;
705 pathlen = strlen(path);
708 extlist = emptyextlist;
709 for (cpp = extlist; *cpp; cpp++) {
714 result = malloc(pathlen + namelen + extlen + 2);
717 bcopy(path, result, pathlen);
718 if (pathlen > 0 && result[pathlen - 1] != '/')
719 result[pathlen++] = '/';
720 cp = result + pathlen;
721 bcopy(name, cp, namelen);
723 for (cpp = extlist; *cpp; cpp++) {
725 if (stat(result, &st) == 0 && S_ISREG(st.st_mode))
733 * Check if file name have any qualifiers
736 file_havepath(const char *name)
740 archsw.arch_getdev(NULL, name, &cp);
741 return (cp != name || strchr(name, '/') != NULL);
745 * Attempt to find the file (name) on the module searchpath.
746 * If (name) is qualified in any way, we simply check it and
747 * return it or NULL. If it is not qualified, then we attempt
748 * to construct a path using entries in the environment variable
751 * The path we return a pointer to need never be freed, as we manage
755 file_search(const char *name, char **extlist)
757 struct moduledir *mdp;
762 /* Don't look for nothing */
767 return(strdup(name));
769 if (file_havepath(name)) {
770 /* Qualified, so just see if it exists */
771 if (stat(name, &sb) == 0)
772 return(strdup(name));
777 namelen = strlen(name);
778 STAILQ_FOREACH(mdp, &moduledir_list, d_link) {
779 result = file_lookup(mdp->d_path, name, namelen, extlist);
786 #define INT_ALIGN(base, ptr) ptr = \
787 (base) + roundup2((ptr) - (base), sizeof(int))
790 mod_search_hints(struct moduledir *mdp, const char *modname,
791 struct mod_depend *verinfo)
793 u_char *cp, *recptr, *bufend, *best;
795 int *intp, bestver, blen, clen, found, ival, modnamelen, reclen;
797 moduledir_readhints(mdp);
798 modnamelen = strlen(modname);
802 if (mdp->d_hints == NULL)
804 recptr = mdp->d_hints;
805 bufend = recptr + mdp->d_hintsz;
808 while (recptr < bufend && !found) {
816 if (clen != modnamelen || bcmp(cp, modname, clen) != 0)
819 INT_ALIGN(mdp->d_hints, cp);
823 if (verinfo == NULL || ival == verinfo->md_ver_preferred) {
827 if (ival >= verinfo->md_ver_minimum &&
828 ival <= verinfo->md_ver_maximum &&
838 recptr += reclen + sizeof(int);
841 * Finally check if KLD is in the place
844 result = file_lookup(mdp->d_path, (const char *)cp, clen, NULL);
846 result = file_lookup(mdp->d_path, (const char *)best, blen, NULL);
849 * If nothing found or hints is absent - fallback to the old way
850 * by using "kldname[.ko]" as module name.
852 if (!found && !bestver && result == NULL)
853 result = file_lookup(mdp->d_path, modname, modnamelen, kld_ext_list);
858 * Attempt to locate the file containing the module (name)
861 mod_searchmodule(char *name, struct mod_depend *verinfo)
863 struct moduledir *mdp;
868 * Now we ready to lookup module in the given directories
871 STAILQ_FOREACH(mdp, &moduledir_list, d_link) {
872 result = mod_search_hints(mdp, name, verinfo);
881 file_addmodule(struct preloaded_file *fp, char *modname, int version,
882 struct kernel_module **newmp)
884 struct kernel_module *mp;
885 struct mod_depend mdepend;
887 bzero(&mdepend, sizeof(mdepend));
888 mdepend.md_ver_preferred = version;
889 mp = file_findmodule(fp, modname, &mdepend);
892 mp = malloc(sizeof(struct kernel_module));
895 bzero(mp, sizeof(struct kernel_module));
896 mp->m_name = strdup(modname);
897 mp->m_version = version;
899 mp->m_next = fp->f_modules;
910 file_discard(struct preloaded_file *fp)
912 struct file_metadata *md, *md1;
913 struct kernel_module *mp, *mp1;
930 if (fp->f_name != NULL)
932 if (fp->f_type != NULL)
934 if (fp->f_args != NULL)
940 * Allocate a new file; must be used instead of malloc()
941 * to ensure safe initialisation.
943 struct preloaded_file *
946 struct preloaded_file *fp;
948 if ((fp = malloc(sizeof(struct preloaded_file))) != NULL) {
949 bzero(fp, sizeof(struct preloaded_file));
955 * Add a module to the chain
958 file_insert_tail(struct preloaded_file *fp)
960 struct preloaded_file *cm;
962 /* Append to list of loaded file */
964 if (preloaded_files == NULL) {
965 preloaded_files = fp;
967 for (cm = preloaded_files; cm->f_next != NULL; cm = cm->f_next)
974 moduledir_fullpath(struct moduledir *mdp, const char *fname)
978 cp = malloc(strlen(mdp->d_path) + strlen(fname) + 2);
981 strcpy(cp, mdp->d_path);
988 * Read linker.hints file into memory performing some sanity checks.
991 moduledir_readhints(struct moduledir *mdp)
995 int fd, size, version;
997 if (mdp->d_hints != NULL || (mdp->d_flags & MDIR_NOHINTS))
999 path = moduledir_fullpath(mdp, "linker.hints");
1000 if (stat(path, &st) != 0 ||
1001 st.st_size < (ssize_t)(sizeof(version) + sizeof(int)) ||
1002 st.st_size > LINKER_HINTS_MAX || (fd = open(path, O_RDONLY)) < 0) {
1004 mdp->d_flags |= MDIR_NOHINTS;
1008 size = read(fd, &version, sizeof(version));
1009 if (size != sizeof(version) || version != LINKER_HINTS_VERSION)
1011 size = st.st_size - size;
1012 mdp->d_hints = malloc(size);
1013 if (mdp->d_hints == NULL)
1015 if (read(fd, mdp->d_hints, size) != size)
1017 mdp->d_hintsz = size;
1024 mdp->d_hints = NULL;
1026 mdp->d_flags |= MDIR_NOHINTS;
1031 * Extract directories from the ';' separated list, remove duplicates.
1034 moduledir_rebuild(void)
1036 struct moduledir *mdp, *mtmp;
1037 const char *path, *cp, *ep;
1040 path = getenv("module_path");
1042 path = default_searchpath;
1044 * Rebuild list of module directories if it changed
1046 STAILQ_FOREACH(mdp, &moduledir_list, d_link)
1047 mdp->d_flags |= MDIR_REMOVED;
1049 for (ep = path; *ep != 0; ep++) {
1051 for (; *ep != 0 && *ep != ';'; ep++)
1054 * Ignore trailing slashes
1056 for (cplen = ep - cp; cplen > 1 && cp[cplen - 1] == '/'; cplen--)
1058 STAILQ_FOREACH(mdp, &moduledir_list, d_link) {
1059 if (strlen(mdp->d_path) != cplen || bcmp(cp, mdp->d_path, cplen) != 0)
1061 mdp->d_flags &= ~MDIR_REMOVED;
1065 mdp = malloc(sizeof(*mdp) + cplen + 1);
1068 mdp->d_path = (char*)(mdp + 1);
1069 bcopy(cp, mdp->d_path, cplen);
1070 mdp->d_path[cplen] = 0;
1071 mdp->d_hints = NULL;
1073 STAILQ_INSERT_TAIL(&moduledir_list, mdp, d_link);
1079 * Delete unused directories if any
1081 mdp = STAILQ_FIRST(&moduledir_list);
1083 if ((mdp->d_flags & MDIR_REMOVED) == 0) {
1084 mdp = STAILQ_NEXT(mdp, d_link);
1089 mdp = STAILQ_NEXT(mdp, d_link);
1090 STAILQ_REMOVE(&moduledir_list, mtmp, moduledir, d_link);