Date: Mon, 17 Feb 2014 11:44:58 +0000 (UTC) From: Andriy Gapon <avg@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-9@freebsd.org Subject: svn commit: r262026 - stable/9/sys/kern Message-ID: <201402171144.s1HBiwdp017731@svn.freebsd.org>
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Author: avg Date: Mon Feb 17 11:44:58 2014 New Revision: 262026 URL: http://svnweb.freebsd.org/changeset/base/262026 Log: MFC r254810: Remove the kld lock macros and just use the sx(9) API Modified: stable/9/sys/kern/kern_linker.c Directory Properties: stable/9/sys/ (props changed) Modified: stable/9/sys/kern/kern_linker.c ============================================================================== --- stable/9/sys/kern/kern_linker.c Mon Feb 17 11:36:30 2014 (r262025) +++ stable/9/sys/kern/kern_linker.c Mon Feb 17 11:44:58 2014 (r262026) @@ -69,17 +69,6 @@ SYSCTL_INT(_debug, OID_AUTO, kld_debug, &kld_debug, 0, "Set various levels of KLD debug"); #endif -#define KLD_LOCK() sx_xlock(&kld_sx) -#define KLD_UNLOCK() sx_xunlock(&kld_sx) -#define KLD_DOWNGRADE() sx_downgrade(&kld_sx) -#define KLD_LOCK_READ() sx_slock(&kld_sx) -#define KLD_UNLOCK_READ() sx_sunlock(&kld_sx) -#define KLD_LOCKED() sx_xlocked(&kld_sx) -#define KLD_LOCK_ASSERT() do { \ - if (!cold) \ - sx_assert(&kld_sx, SX_XLOCKED); \ -} while (0) - /* * static char *linker_search_path(const char *name, struct mod_depend * *verinfo); @@ -119,7 +108,8 @@ static int linker_no_more_classes = 0; #define LINKER_GET_NEXT_FILE_ID(a) do { \ linker_file_t lftmp; \ \ - KLD_LOCK_ASSERT(); \ + if (!cold) \ + sx_assert(&kld_sx, SA_XLOCKED); \ retry: \ TAILQ_FOREACH(lftmp, &linker_files, link) { \ if (next_file_id == lftmp->id) { \ @@ -368,7 +358,9 @@ static void linker_init_kernel_modules(void) { + sx_xlock(&kld_sx); linker_file_register_modules(linker_kernel_file); + sx_xunlock(&kld_sx); } SYSINIT(linker_kernel, SI_SUB_KLD, SI_ORDER_ANY, linker_init_kernel_modules, @@ -385,7 +377,7 @@ linker_load_file(const char *filename, l if (prison0.pr_securelevel > 0) return (EPERM); - KLD_LOCK_ASSERT(); + sx_assert(&kld_sx, SA_XLOCKED); lf = linker_find_file_by_name(filename); if (lf) { KLD_DPF(FILE, ("linker_load_file: file %s is already loaded," @@ -419,10 +411,10 @@ linker_load_file(const char *filename, l return (error); } modules = !TAILQ_EMPTY(&lf->modules); - KLD_UNLOCK(); + sx_xunlock(&kld_sx); linker_file_register_sysctls(lf); linker_file_sysinit(lf); - KLD_LOCK(); + sx_xlock(&kld_sx); lf->flags |= LINKER_FILE_LINKED; /* @@ -473,16 +465,16 @@ linker_reference_module(const char *modn modlist_t mod; int error; - KLD_LOCK(); + sx_xlock(&kld_sx); if ((mod = modlist_lookup2(modname, verinfo)) != NULL) { *result = mod->container; (*result)->refs++; - KLD_UNLOCK(); + sx_xunlock(&kld_sx); return (0); } error = linker_load_module(NULL, modname, NULL, verinfo, result); - KLD_UNLOCK(); + sx_xunlock(&kld_sx); return (error); } @@ -493,13 +485,13 @@ linker_release_module(const char *modnam modlist_t mod; int error; - KLD_LOCK(); + sx_xlock(&kld_sx); if (lf == NULL) { KASSERT(modname != NULL, ("linker_release_module: no file or name")); mod = modlist_lookup2(modname, verinfo); if (mod == NULL) { - KLD_UNLOCK(); + sx_xunlock(&kld_sx); return (ESRCH); } lf = mod->container; @@ -507,7 +499,7 @@ linker_release_module(const char *modnam KASSERT(modname == NULL && verinfo == NULL, ("linker_release_module: both file and name")); error = linker_file_unload(lf, LINKER_UNLOAD_NORMAL); - KLD_UNLOCK(); + sx_xunlock(&kld_sx); return (error); } @@ -520,7 +512,7 @@ linker_find_file_by_name(const char *fil koname = malloc(strlen(filename) + 4, M_LINKER, M_WAITOK); sprintf(koname, "%s.ko", filename); - KLD_LOCK_ASSERT(); + sx_assert(&kld_sx, SA_XLOCKED); TAILQ_FOREACH(lf, &linker_files, link) { if (strcmp(lf->filename, koname) == 0) break; @@ -536,7 +528,7 @@ linker_find_file_by_id(int fileid) { linker_file_t lf; - KLD_LOCK_ASSERT(); + sx_assert(&kld_sx, SA_XLOCKED); TAILQ_FOREACH(lf, &linker_files, link) if (lf->id == fileid && lf->flags & LINKER_FILE_LINKED) break; @@ -549,13 +541,13 @@ linker_file_foreach(linker_predicate_t * linker_file_t lf; int retval = 0; - KLD_LOCK(); + sx_xlock(&kld_sx); TAILQ_FOREACH(lf, &linker_files, link) { retval = predicate(lf, context); if (retval != 0) break; } - KLD_UNLOCK(); + sx_xunlock(&kld_sx); return (retval); } @@ -565,7 +557,8 @@ linker_make_file(const char *pathname, l linker_file_t lf; const char *filename; - KLD_LOCK_ASSERT(); + if (!cold) + sx_assert(&kld_sx, SA_XLOCKED); filename = linker_basename(pathname); KLD_DPF(FILE, ("linker_make_file: new file, filename='%s' for pathname='%s'\n", filename, pathname)); @@ -599,7 +592,7 @@ linker_file_unload(linker_file_t file, i if (prison0.pr_securelevel > 0) return (EPERM); - KLD_LOCK_ASSERT(); + sx_assert(&kld_sx, SA_XLOCKED); KLD_DPF(FILE, ("linker_file_unload: lf->refs=%d\n", file->refs)); /* Easy case of just dropping a reference. */ @@ -672,10 +665,10 @@ linker_file_unload(linker_file_t file, i */ if (file->flags & LINKER_FILE_LINKED) { file->flags &= ~LINKER_FILE_LINKED; - KLD_UNLOCK(); + sx_xunlock(&kld_sx); linker_file_sysuninit(file); linker_file_unregister_sysctls(file); - KLD_LOCK(); + sx_xlock(&kld_sx); } TAILQ_REMOVE(&linker_files, file, link); @@ -714,7 +707,7 @@ linker_file_add_dependency(linker_file_t { linker_file_t *newdeps; - KLD_LOCK_ASSERT(); + sx_assert(&kld_sx, SA_XLOCKED); newdeps = malloc((file->ndeps + 1) * sizeof(linker_file_t *), M_LINKER, M_WAITOK | M_ZERO); if (newdeps == NULL) @@ -746,12 +739,12 @@ linker_file_lookup_set(linker_file_t fil { int error, locked; - locked = KLD_LOCKED(); + locked = sx_xlocked(&kld_sx); if (!locked) - KLD_LOCK(); + sx_xlock(&kld_sx); error = LINKER_LOOKUP_SET(file, name, firstp, lastp, countp); if (!locked) - KLD_UNLOCK(); + sx_xunlock(&kld_sx); return (error); } @@ -771,12 +764,12 @@ linker_file_lookup_symbol(linker_file_t caddr_t sym; int locked; - locked = KLD_LOCKED(); + locked = sx_xlocked(&kld_sx); if (!locked) - KLD_LOCK(); + sx_xlock(&kld_sx); sym = linker_file_lookup_symbol_internal(file, name, deps); if (!locked) - KLD_UNLOCK(); + sx_xunlock(&kld_sx); return (sym); } @@ -790,7 +783,7 @@ linker_file_lookup_symbol_internal(linke size_t common_size = 0; int i; - KLD_LOCK_ASSERT(); + sx_assert(&kld_sx, SA_XLOCKED); KLD_DPF(SYM, ("linker_file_lookup_symbol: file=%p, name=%s, deps=%d\n", file, name, deps)); @@ -990,9 +983,9 @@ linker_search_symbol_name(caddr_t value, { int error; - KLD_LOCK(); + sx_xlock(&kld_sx); error = linker_debug_search_symbol_name(value, buf, buflen, offset); - KLD_UNLOCK(); + sx_xunlock(&kld_sx); return (error); } @@ -1034,10 +1027,10 @@ kern_kldload(struct thread *td, const ch modname = file; } - KLD_LOCK(); + sx_xlock(&kld_sx); error = linker_load_module(kldname, modname, NULL, NULL, &lf); if (error) { - KLD_UNLOCK(); + sx_xunlock(&kld_sx); goto done; } lf->userrefs++; @@ -1047,13 +1040,13 @@ kern_kldload(struct thread *td, const ch EVENTHANDLER_INVOKE(kld_load, lf); #ifdef HWPMC_HOOKS - KLD_DOWNGRADE(); + sx_downgrade(&kld_sx); pkm.pm_file = lf->filename; pkm.pm_address = (uintptr_t) lf->address; PMC_CALL_HOOK(td, PMC_FN_KLD_LOAD, (void *) &pkm); - KLD_UNLOCK_READ(); + sx_sunlock(&kld_sx); #else - KLD_UNLOCK(); + sx_xunlock(&kld_sx); #endif done: @@ -1096,7 +1089,7 @@ kern_kldunload(struct thread *td, int fi return (error); CURVNET_SET(TD_TO_VNET(td)); - KLD_LOCK(); + sx_xlock(&kld_sx); lf = linker_find_file_by_id(fileid); if (lf) { KLD_DPF(FILE, ("kldunload: lf->userrefs=%d\n", lf->userrefs)); @@ -1127,13 +1120,13 @@ kern_kldunload(struct thread *td, int fi #ifdef HWPMC_HOOKS if (error == 0) { - KLD_DOWNGRADE(); + sx_downgrade(&kld_sx); PMC_CALL_HOOK(td, PMC_FN_KLD_UNLOAD, (void *) &pkm); - KLD_UNLOCK_READ(); + sx_sunlock(&kld_sx); } else - KLD_UNLOCK(); + sx_xunlock(&kld_sx); #else - KLD_UNLOCK(); + sx_xunlock(&kld_sx); #endif CURVNET_RESTORE(); return (error); @@ -1177,13 +1170,13 @@ sys_kldfind(struct thread *td, struct kl goto out; filename = linker_basename(pathname); - KLD_LOCK(); + sx_xlock(&kld_sx); lf = linker_find_file_by_name(filename); if (lf) td->td_retval[0] = lf->id; else error = ENOENT; - KLD_UNLOCK(); + sx_xunlock(&kld_sx); out: free(pathname, M_TEMP); return (error); @@ -1201,7 +1194,7 @@ sys_kldnext(struct thread *td, struct kl return (error); #endif - KLD_LOCK(); + sx_xlock(&kld_sx); if (uap->fileid == 0) lf = TAILQ_FIRST(&linker_files); else { @@ -1222,7 +1215,7 @@ sys_kldnext(struct thread *td, struct kl else td->td_retval[0] = 0; out: - KLD_UNLOCK(); + sx_xunlock(&kld_sx); return (error); } @@ -1261,10 +1254,10 @@ kern_kldstat(struct thread *td, int file return (error); #endif - KLD_LOCK(); + sx_xlock(&kld_sx); lf = linker_find_file_by_id(fileid); if (lf == NULL) { - KLD_UNLOCK(); + sx_xunlock(&kld_sx); return (ENOENT); } @@ -1282,7 +1275,7 @@ kern_kldstat(struct thread *td, int file if (namelen > MAXPATHLEN) namelen = MAXPATHLEN; bcopy(lf->pathname, &stat->pathname[0], namelen); - KLD_UNLOCK(); + sx_xunlock(&kld_sx); td->td_retval[0] = 0; return (0); @@ -1301,7 +1294,7 @@ sys_kldfirstmod(struct thread *td, struc return (error); #endif - KLD_LOCK(); + sx_xlock(&kld_sx); lf = linker_find_file_by_id(uap->fileid); if (lf) { MOD_SLOCK; @@ -1313,7 +1306,7 @@ sys_kldfirstmod(struct thread *td, struc MOD_SUNLOCK; } else error = ENOENT; - KLD_UNLOCK(); + sx_xunlock(&kld_sx); return (error); } @@ -1341,7 +1334,7 @@ sys_kldsym(struct thread *td, struct kld symstr = malloc(MAXPATHLEN, M_TEMP, M_WAITOK); if ((error = copyinstr(lookup.symname, symstr, MAXPATHLEN, NULL)) != 0) goto out; - KLD_LOCK(); + sx_xlock(&kld_sx); if (uap->fileid != 0) { lf = linker_find_file_by_id(uap->fileid); if (lf == NULL) @@ -1367,7 +1360,7 @@ sys_kldsym(struct thread *td, struct kld if (lf == NULL) error = ENOENT; } - KLD_UNLOCK(); + sx_xunlock(&kld_sx); out: free(symstr, M_TEMP); return (error); @@ -1476,6 +1469,7 @@ linker_preload(void *arg) error = 0; modptr = NULL; + sx_xlock(&kld_sx); while ((modptr = preload_search_next_name(modptr)) != NULL) { modname = (char *)preload_search_info(modptr, MODINFO_NAME); modtype = (char *)preload_search_info(modptr, MODINFO_TYPE); @@ -1657,6 +1651,7 @@ fail: TAILQ_REMOVE(&depended_files, lf, loaded); linker_file_unload(lf, LINKER_UNLOAD_FORCE); } + sx_xunlock(&kld_sx); /* woohoo! we made it! */ } @@ -1962,7 +1957,7 @@ linker_hwpmc_list_objects(void) int i, nmappings; nmappings = 0; - KLD_LOCK_READ(); + sx_slock(&kld_sx); TAILQ_FOREACH(lf, &linker_files, link) nmappings++; @@ -1977,7 +1972,7 @@ linker_hwpmc_list_objects(void) kobase[i].pm_address = (uintptr_t)lf->address; i++; } - KLD_UNLOCK_READ(); + sx_sunlock(&kld_sx); KASSERT(i > 0, ("linker_hpwmc_list_objects: no kernel objects?")); @@ -2003,7 +1998,7 @@ linker_load_module(const char *kldname, char *pathname; int error; - KLD_LOCK_ASSERT(); + sx_assert(&kld_sx, SA_XLOCKED); if (modname == NULL) { /* * We have to load KLD @@ -2077,7 +2072,7 @@ linker_load_dependencies(linker_file_t l /* * All files are dependant on /kernel. */ - KLD_LOCK_ASSERT(); + sx_assert(&kld_sx, SA_XLOCKED); if (linker_kernel_file) { linker_kernel_file->refs++; error = linker_file_add_dependency(lf, linker_kernel_file); @@ -2169,16 +2164,16 @@ sysctl_kern_function_list(SYSCTL_HANDLER error = sysctl_wire_old_buffer(req, 0); if (error != 0) return (error); - KLD_LOCK(); + sx_xlock(&kld_sx); TAILQ_FOREACH(lf, &linker_files, link) { error = LINKER_EACH_FUNCTION_NAME(lf, sysctl_kern_function_list_iterate, req); if (error) { - KLD_UNLOCK(); + sx_xunlock(&kld_sx); return (error); } } - KLD_UNLOCK(); + sx_xunlock(&kld_sx); return (SYSCTL_OUT(req, "", 1)); }
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