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 dflag, dofile, dokld, ch, error;
111 dflag = dokld = dofile = 0;
116 command_errmsg = "no filename specified";
119 prefix = skip = NULL;
120 while ((ch = getopt(argc, argv, "dkp:s:t:")) != -1) {
140 /* getopt has already reported an error */
144 argv += (optind - 1);
145 argc -= (optind - 1);
148 * Request to load a raw file?
151 if ((argc != 2) || (typestr == NULL) || (*typestr == 0)) {
152 command_errmsg = "invalid load type";
156 #ifdef LOADER_VERIEXEC
157 if (strncmp(typestr, "manifest", 8) == 0) {
160 return (load_manifest(argv[1], prefix, skip, NULL));
162 #ifdef LOADER_VERIEXEC_PASS_MANIFEST
163 if (strncmp(typestr, "pass_manifest", 13) == 0) {
166 return (pass_manifest(argv[1], prefix));
171 fp = file_findfile(argv[1], typestr);
173 snprintf(command_errbuf, sizeof(command_errbuf),
174 "warning: file '%s' already loaded", argv[1]);
178 if (file_loadraw(argv[1], typestr, 1) != NULL)
181 /* Failing to load mfs_root is never going to end well! */
182 if (strcmp("mfs_root", typestr) == 0)
188 * Do we have explicit KLD load ?
190 if (dokld || file_havepath(argv[1])) {
191 error = mod_loadkld(argv[1], argc - 2, argv + 2);
192 if (error == EEXIST) {
193 snprintf(command_errbuf, sizeof(command_errbuf),
194 "warning: KLD '%s' already loaded", argv[1]);
198 return (error == 0 ? CMD_OK : CMD_CRIT);
201 * Looks like a request for a module.
203 error = mod_load(argv[1], NULL, argc - 2, argv + 2);
204 if (error == EEXIST) {
205 snprintf(command_errbuf, sizeof(command_errbuf),
206 "warning: module '%s' already loaded", argv[1]);
210 return (error == 0 ? CMD_OK : CMD_CRIT);
213 #ifdef LOADER_GELI_SUPPORT
214 COMMAND_SET(load_geli, "load_geli", "load a geli key", command_load_geli);
217 command_load_geli(int argc, char *argv[])
224 command_errmsg = "usage is [-n key#] <prov> <file>";
231 while ((ch = getopt(argc, argv, "n:")) != -1) {
234 num = strtol(optarg, &cp, 0);
236 snprintf(command_errbuf, sizeof(command_errbuf),
237 "bad key index '%s'", optarg);
243 /* getopt has already reported an error */
247 argv += (optind - 1);
248 argc -= (optind - 1);
249 sprintf(typestr, "%s:geli_keyfile%d", argv[1], num);
250 return (file_loadraw(argv[2], typestr, 1) ? CMD_OK : CMD_ERROR);
257 struct preloaded_file *fp;
259 while (preloaded_files != NULL) {
260 fp = preloaded_files;
261 preloaded_files = preloaded_files->f_next;
265 unsetenv("kernelname");
268 COMMAND_SET(unload, "unload", "unload all modules", command_unload);
271 command_unload(int argc, char *argv[])
277 COMMAND_SET(lsmod, "lsmod", "list loaded modules", command_lsmod);
280 command_lsmod(int argc, char *argv[])
282 struct preloaded_file *fp;
283 struct kernel_module *mp;
284 struct file_metadata *md;
286 int ch, verbose, ret = 0;
291 while ((ch = getopt(argc, argv, "v")) != -1) {
298 /* getopt has already reported an error */
304 for (fp = preloaded_files; fp; fp = fp->f_next) {
305 snprintf(lbuf, sizeof(lbuf), " %p: ", (void *) fp->f_addr);
307 pager_output(fp->f_name);
308 snprintf(lbuf, sizeof(lbuf), " (%s, 0x%lx)\n", fp->f_type,
310 if (pager_output(lbuf))
312 if (fp->f_args != NULL) {
313 pager_output(" args: ");
314 pager_output(fp->f_args);
315 if (pager_output("\n"))
319 pager_output(" modules: ");
320 for (mp = fp->f_modules; mp; mp = mp->m_next) {
321 snprintf(lbuf, sizeof(lbuf), "%s.%d ", mp->m_name,
325 if (pager_output("\n"))
329 /* XXX could add some formatting smarts here to display some better */
330 for (md = fp->f_metadata; md != NULL; md = md->md_next) {
331 snprintf(lbuf, sizeof(lbuf), " 0x%04x, 0x%lx\n",
332 md->md_type, (long) md->md_size);
333 if (pager_output(lbuf))
345 * File level interface, functions file_*
348 file_load(char *filename, vm_offset_t dest, struct preloaded_file **result)
350 static int last_file_format = 0;
351 struct preloaded_file *fp;
355 if (archsw.arch_loadaddr != NULL)
356 dest = archsw.arch_loadaddr(LOAD_RAW, filename, dest);
359 for (i = last_file_format, fp = NULL;
360 file_formats[i] && fp == NULL; i++) {
361 error = (file_formats[i]->l_load)(filename, dest, &fp);
363 fp->f_loader = last_file_format = i; /* remember the loader */
366 } else if (last_file_format == i && i != 0) {
367 /* Restart from the beginning */
369 last_file_format = 0;
374 continue; /* Unknown to this handler? */
376 snprintf(command_errbuf, sizeof(command_errbuf),
377 "can't load file '%s': %s", filename, strerror(error));
385 file_load_dependencies(struct preloaded_file *base_file)
387 struct file_metadata *md;
388 struct preloaded_file *fp;
389 struct mod_depend *verinfo;
390 struct kernel_module *mp;
394 md = file_findmetadata(base_file, MODINFOMD_DEPLIST);
399 verinfo = (struct mod_depend*)md->md_data;
400 dmodname = (char *)(verinfo + 1);
401 if (file_findmodule(NULL, dmodname, verinfo) == NULL) {
402 printf("loading required module '%s'\n", dmodname);
403 error = mod_load(dmodname, verinfo, 0, NULL);
407 * If module loaded via kld name which isn't listed
408 * in the linker.hints file, we should check if it have
411 mp = file_findmodule(NULL, dmodname, verinfo);
413 snprintf(command_errbuf, sizeof(command_errbuf),
414 "module '%s' exists but with wrong version", dmodname);
419 md = metadata_next(md, MODINFOMD_DEPLIST);
423 /* Load failed; discard everything */
424 while (base_file != NULL) {
426 base_file = base_file->f_next;
433 * We've been asked to load (fname) as (type), so just suck it in,
434 * no arguments or anything.
436 struct preloaded_file *
437 file_loadraw(const char *fname, char *type, int insert)
439 struct preloaded_file *fp;
444 /* We can't load first */
445 if ((file_findfile(NULL, NULL)) == NULL) {
446 command_errmsg = "can't load file before kernel";
450 /* locate the file on the load path */
451 name = file_search(fname, NULL);
453 snprintf(command_errbuf, sizeof(command_errbuf),
454 "can't find '%s'", fname);
458 if ((fd = open(name, O_RDONLY)) < 0) {
459 snprintf(command_errbuf, sizeof(command_errbuf),
460 "can't open '%s': %s", name, strerror(errno));
465 #ifdef LOADER_VERIEXEC
466 if (verify_file(fd, name, 0, VE_MUST) < 0) {
467 sprintf(command_errbuf, "can't verify '%s'", name);
474 if (archsw.arch_loadaddr != NULL)
475 loadaddr = archsw.arch_loadaddr(LOAD_RAW, name, loadaddr);
481 /* read in 4k chunks; size is not really important */
482 got = archsw.arch_readin(fd, laddr, 4096);
483 if (got == 0) /* end of file */
485 if (got < 0) { /* error */
486 snprintf(command_errbuf, sizeof(command_errbuf),
487 "error reading '%s': %s", name, strerror(errno));
495 printf("size=%#jx\n", (uintmax_t)(laddr - loadaddr));
497 /* Looks OK so far; create & populate control structure */
499 fp->f_name = strdup(name);
500 fp->f_type = strdup(type);
502 fp->f_metadata = NULL;
504 fp->f_addr = loadaddr;
505 fp->f_size = laddr - loadaddr;
507 /* recognise space consumption */
510 /* Add to the list of loaded files */
512 file_insert_tail(fp);
518 * Load the module (name), pass it (argc),(argv), add container file
519 * to the list of loaded files.
520 * If module is already loaded just assign new argc/argv.
523 mod_load(char *modname, struct mod_depend *verinfo, int argc, char *argv[])
525 struct kernel_module *mp;
529 if (file_havepath(modname)) {
530 printf("Warning: mod_load() called instead of mod_loadkld() for module '%s'\n", modname);
531 return (mod_loadkld(modname, argc, argv));
533 /* see if module is already loaded */
534 mp = file_findmodule(NULL, modname, verinfo);
539 mp->m_args = unargv(argc, argv);
541 snprintf(command_errbuf, sizeof(command_errbuf),
542 "warning: module '%s' already loaded", mp->m_name);
545 /* locate file with the module on the search path */
546 filename = mod_searchmodule(modname, verinfo);
547 if (filename == NULL) {
548 snprintf(command_errbuf, sizeof(command_errbuf),
549 "can't find '%s'", modname);
552 err = mod_loadkld(filename, argc, argv);
557 * Load specified KLD. If path is omitted, then try to locate it via
561 mod_loadkld(const char *kldname, int argc, char *argv[])
563 struct preloaded_file *fp, *last_file;
568 * Get fully qualified KLD name
570 filename = file_search(kldname, kld_ext_list);
571 if (filename == NULL) {
572 snprintf(command_errbuf, sizeof(command_errbuf),
573 "can't find '%s'", kldname);
577 * Check if KLD already loaded
579 fp = file_findfile(filename, NULL);
581 snprintf(command_errbuf, sizeof(command_errbuf),
582 "warning: KLD '%s' already loaded", filename);
586 for (last_file = preloaded_files;
587 last_file != NULL && last_file->f_next != NULL;
588 last_file = last_file->f_next)
592 err = file_load(filename, loadaddr, &fp);
595 fp->f_args = unargv(argc, argv);
596 loadaddr = fp->f_addr + fp->f_size;
597 file_insert_tail(fp); /* Add to the list of loaded files */
598 if (file_load_dependencies(fp) != 0) {
600 last_file->f_next = NULL;
601 loadaddr = last_file->f_addr + last_file->f_size;
607 snprintf(command_errbuf, sizeof(command_errbuf),
608 "don't know how to load module '%s'", filename);
617 * Find a file matching (name) and (type).
618 * NULL may be passed as a wildcard to either.
620 struct preloaded_file *
621 file_findfile(const char *name, const char *type)
623 struct preloaded_file *fp;
625 for (fp = preloaded_files; fp != NULL; fp = fp->f_next) {
626 if (((name == NULL) || !strcmp(name, fp->f_name)) &&
627 ((type == NULL) || !strcmp(type, fp->f_type)))
634 * Find a module matching (name) inside of given file.
635 * NULL may be passed as a wildcard.
637 struct kernel_module *
638 file_findmodule(struct preloaded_file *fp, char *modname,
639 struct mod_depend *verinfo)
641 struct kernel_module *mp, *best;
645 for (fp = preloaded_files; fp; fp = fp->f_next) {
646 mp = file_findmodule(fp, modname, verinfo);
654 for (mp = fp->f_modules; mp; mp = mp->m_next) {
655 if (strcmp(modname, mp->m_name) == 0) {
658 mver = mp->m_version;
659 if (mver == verinfo->md_ver_preferred)
661 if (mver >= verinfo->md_ver_minimum &&
662 mver <= verinfo->md_ver_maximum &&
672 * Make a copy of (size) bytes of data from (p), and associate them as
673 * metadata of (type) to the module (mp).
676 file_addmetadata(struct preloaded_file *fp, int type, size_t size, void *p)
678 struct file_metadata *md;
680 md = malloc(sizeof(struct file_metadata) - sizeof(md->md_data) + size);
683 bcopy(p, md->md_data, size);
684 md->md_next = fp->f_metadata;
689 * Find a metadata object of (type) associated with the file (fp)
691 struct file_metadata *
692 file_findmetadata(struct preloaded_file *fp, int type)
694 struct file_metadata *md;
696 for (md = fp->f_metadata; md != NULL; md = md->md_next)
697 if (md->md_type == type)
703 * Remove all metadata from the file.
706 file_removemetadata(struct preloaded_file *fp)
708 struct file_metadata *md, *next;
710 for (md = fp->f_metadata; md != NULL; md = next)
715 fp->f_metadata = NULL;
718 struct file_metadata *
719 metadata_next(struct file_metadata *md, int type)
723 while((md = md->md_next) != NULL)
724 if (md->md_type == type)
729 static char *emptyextlist[] = { "", NULL };
732 * Check if the given file is in place and return full path to it.
735 file_lookup(const char *path, const char *name, int namelen, char **extlist)
738 char *result, *cp, **cpp;
739 int pathlen, extlen, len;
741 pathlen = strlen(path);
744 extlist = emptyextlist;
745 for (cpp = extlist; *cpp; cpp++) {
750 result = malloc(pathlen + namelen + extlen + 2);
753 bcopy(path, result, pathlen);
754 if (pathlen > 0 && result[pathlen - 1] != '/')
755 result[pathlen++] = '/';
756 cp = result + pathlen;
757 bcopy(name, cp, namelen);
759 for (cpp = extlist; *cpp; cpp++) {
761 if (stat(result, &st) == 0 && S_ISREG(st.st_mode))
769 * Check if file name have any qualifiers
772 file_havepath(const char *name)
776 archsw.arch_getdev(NULL, name, &cp);
777 return (cp != name || strchr(name, '/') != NULL);
781 * Attempt to find the file (name) on the module searchpath.
782 * If (name) is qualified in any way, we simply check it and
783 * return it or NULL. If it is not qualified, then we attempt
784 * to construct a path using entries in the environment variable
787 * The path we return a pointer to need never be freed, as we manage
791 file_search(const char *name, char **extlist)
793 struct moduledir *mdp;
798 /* Don't look for nothing */
803 return(strdup(name));
805 if (file_havepath(name)) {
806 /* Qualified, so just see if it exists */
807 if (stat(name, &sb) == 0)
808 return(strdup(name));
813 namelen = strlen(name);
814 STAILQ_FOREACH(mdp, &moduledir_list, d_link) {
815 result = file_lookup(mdp->d_path, name, namelen, extlist);
822 #define INT_ALIGN(base, ptr) ptr = \
823 (base) + roundup2((ptr) - (base), sizeof(int))
826 mod_search_hints(struct moduledir *mdp, const char *modname,
827 struct mod_depend *verinfo)
829 u_char *cp, *recptr, *bufend, *best;
831 int *intp, bestver, blen, clen, found, ival, modnamelen, reclen;
833 moduledir_readhints(mdp);
834 modnamelen = strlen(modname);
838 if (mdp->d_hints == NULL)
840 recptr = mdp->d_hints;
841 bufend = recptr + mdp->d_hintsz;
844 while (recptr < bufend && !found) {
852 if (clen != modnamelen || bcmp(cp, modname, clen) != 0)
855 INT_ALIGN(mdp->d_hints, cp);
859 if (verinfo == NULL || ival == verinfo->md_ver_preferred) {
863 if (ival >= verinfo->md_ver_minimum &&
864 ival <= verinfo->md_ver_maximum &&
874 recptr += reclen + sizeof(int);
877 * Finally check if KLD is in the place
880 result = file_lookup(mdp->d_path, (const char *)cp, clen, NULL);
882 result = file_lookup(mdp->d_path, (const char *)best, blen, NULL);
885 * If nothing found or hints is absent - fallback to the old way
886 * by using "kldname[.ko]" as module name.
888 if (!found && !bestver && result == NULL)
889 result = file_lookup(mdp->d_path, modname, modnamelen, kld_ext_list);
894 * Attempt to locate the file containing the module (name)
897 mod_searchmodule(char *name, struct mod_depend *verinfo)
899 struct moduledir *mdp;
904 * Now we ready to lookup module in the given directories
907 STAILQ_FOREACH(mdp, &moduledir_list, d_link) {
908 result = mod_search_hints(mdp, name, verinfo);
917 file_addmodule(struct preloaded_file *fp, char *modname, int version,
918 struct kernel_module **newmp)
920 struct kernel_module *mp;
921 struct mod_depend mdepend;
923 bzero(&mdepend, sizeof(mdepend));
924 mdepend.md_ver_preferred = version;
925 mp = file_findmodule(fp, modname, &mdepend);
928 mp = malloc(sizeof(struct kernel_module));
931 bzero(mp, sizeof(struct kernel_module));
932 mp->m_name = strdup(modname);
933 mp->m_version = version;
935 mp->m_next = fp->f_modules;
946 file_discard(struct preloaded_file *fp)
948 struct file_metadata *md, *md1;
949 struct kernel_module *mp, *mp1;
966 if (fp->f_name != NULL)
968 if (fp->f_type != NULL)
970 if (fp->f_args != NULL)
976 * Allocate a new file; must be used instead of malloc()
977 * to ensure safe initialisation.
979 struct preloaded_file *
982 struct preloaded_file *fp;
984 if ((fp = malloc(sizeof(struct preloaded_file))) != NULL) {
985 bzero(fp, sizeof(struct preloaded_file));
991 * Add a module to the chain
994 file_insert_tail(struct preloaded_file *fp)
996 struct preloaded_file *cm;
998 /* Append to list of loaded file */
1000 if (preloaded_files == NULL) {
1001 preloaded_files = fp;
1003 for (cm = preloaded_files; cm->f_next != NULL; cm = cm->f_next)
1010 moduledir_fullpath(struct moduledir *mdp, const char *fname)
1014 cp = malloc(strlen(mdp->d_path) + strlen(fname) + 2);
1017 strcpy(cp, mdp->d_path);
1024 * Read linker.hints file into memory performing some sanity checks.
1027 moduledir_readhints(struct moduledir *mdp)
1031 int fd, size, version;
1033 if (mdp->d_hints != NULL || (mdp->d_flags & MDIR_NOHINTS))
1035 path = moduledir_fullpath(mdp, "linker.hints");
1036 if (stat(path, &st) != 0 ||
1037 st.st_size < (ssize_t)(sizeof(version) + sizeof(int)) ||
1038 st.st_size > LINKER_HINTS_MAX || (fd = open(path, O_RDONLY)) < 0) {
1040 mdp->d_flags |= MDIR_NOHINTS;
1044 size = read(fd, &version, sizeof(version));
1045 if (size != sizeof(version) || version != LINKER_HINTS_VERSION)
1047 size = st.st_size - size;
1048 mdp->d_hints = malloc(size);
1049 if (mdp->d_hints == NULL)
1051 if (read(fd, mdp->d_hints, size) != size)
1053 mdp->d_hintsz = size;
1060 mdp->d_hints = NULL;
1062 mdp->d_flags |= MDIR_NOHINTS;
1067 * Extract directories from the ';' separated list, remove duplicates.
1070 moduledir_rebuild(void)
1072 struct moduledir *mdp, *mtmp;
1073 const char *path, *cp, *ep;
1076 path = getenv("module_path");
1078 path = default_searchpath;
1080 * Rebuild list of module directories if it changed
1082 STAILQ_FOREACH(mdp, &moduledir_list, d_link)
1083 mdp->d_flags |= MDIR_REMOVED;
1085 for (ep = path; *ep != 0; ep++) {
1087 for (; *ep != 0 && *ep != ';'; ep++)
1090 * Ignore trailing slashes
1092 for (cplen = ep - cp; cplen > 1 && cp[cplen - 1] == '/'; cplen--)
1094 STAILQ_FOREACH(mdp, &moduledir_list, d_link) {
1095 if (strlen(mdp->d_path) != cplen || bcmp(cp, mdp->d_path, cplen) != 0)
1097 mdp->d_flags &= ~MDIR_REMOVED;
1101 mdp = malloc(sizeof(*mdp) + cplen + 1);
1104 mdp->d_path = (char*)(mdp + 1);
1105 bcopy(cp, mdp->d_path, cplen);
1106 mdp->d_path[cplen] = 0;
1107 mdp->d_hints = NULL;
1109 STAILQ_INSERT_TAIL(&moduledir_list, mdp, d_link);
1115 * Delete unused directories if any
1117 mdp = STAILQ_FIRST(&moduledir_list);
1119 if ((mdp->d_flags & MDIR_REMOVED) == 0) {
1120 mdp = STAILQ_NEXT(mdp, d_link);
1125 mdp = STAILQ_NEXT(mdp, d_link);
1126 STAILQ_REMOVE(&moduledir_list, mtmp, moduledir, d_link);