From owner-svn-src-stable-7@FreeBSD.ORG Mon Jul 18 18:09:10 2011 Return-Path: Delivered-To: svn-src-stable-7@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id BCFF7106564A; Mon, 18 Jul 2011 18:09:10 +0000 (UTC) (envelope-from mdf@FreeBSD.org) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:4f8:fff6::2c]) by mx1.freebsd.org (Postfix) with ESMTP id AA7468FC1C; Mon, 18 Jul 2011 18:09:10 +0000 (UTC) Received: from svn.freebsd.org (localhost [127.0.0.1]) by svn.freebsd.org (8.14.4/8.14.4) with ESMTP id p6II9Are033654; Mon, 18 Jul 2011 18:09:10 GMT (envelope-from mdf@svn.freebsd.org) Received: (from mdf@localhost) by svn.freebsd.org (8.14.4/8.14.4/Submit) id p6II9A4u033652; Mon, 18 Jul 2011 18:09:10 GMT (envelope-from mdf@svn.freebsd.org) Message-Id: <201107181809.p6II9A4u033652@svn.freebsd.org> From: Matthew D Fleming Date: Mon, 18 Jul 2011 18:09:10 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-7@freebsd.org X-SVN-Group: stable-7 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Cc: Subject: svn commit: r224191 - stable/7/sys/kern X-BeenThere: svn-src-stable-7@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: SVN commit messages for only the 7-stable src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 18 Jul 2011 18:09:10 -0000 Author: mdf Date: Mon Jul 18 18:09:10 2011 New Revision: 224191 URL: http://svn.freebsd.org/changeset/base/224191 Log: MFC r223875, r223876: style(9) and cleanup fixes. Add an option to have a fail point term only execute when run by a specified pid. This is helpful for automated testing involving a global knob that would otherwise be executed by many other threads. Modified: stable/7/sys/kern/kern_fail.c Directory Properties: stable/7/sys/ (props changed) stable/7/sys/cddl/contrib/opensolaris/ (props changed) stable/7/sys/contrib/dev/acpica/ (props changed) stable/7/sys/contrib/pf/ (props changed) Modified: stable/7/sys/kern/kern_fail.c ============================================================================== --- stable/7/sys/kern/kern_fail.c Mon Jul 18 18:06:39 2011 (r224190) +++ stable/7/sys/kern/kern_fail.c Mon Jul 18 18:09:10 2011 (r224191) @@ -52,6 +52,7 @@ #include __FBSDID("$FreeBSD$"); +#include #include #include #include @@ -59,6 +60,7 @@ __FBSDID("$FreeBSD$"); #include #include #include +#include #include #include @@ -88,16 +90,20 @@ enum fail_point_t { FAIL_POINT_BREAK, /**< break into the debugger */ FAIL_POINT_PRINT, /**< print a message */ FAIL_POINT_SLEEP, /**< sleep for some msecs */ - FAIL_POINT_INVALID, /**< placeholder */ + FAIL_POINT_NUMTYPES }; -static const char *fail_type_strings[] = { - "off", - "panic", - "return", - "break", - "print", - "sleep", +static struct { + const char *name; + int nmlen; +} fail_type_strings[] = { +#define FP_TYPE_NM_LEN(s) { s, sizeof(s) - 1 } + [FAIL_POINT_OFF] = FP_TYPE_NM_LEN("off"), + [FAIL_POINT_PANIC] = FP_TYPE_NM_LEN("panic"), + [FAIL_POINT_RETURN] = FP_TYPE_NM_LEN("return"), + [FAIL_POINT_BREAK] = FP_TYPE_NM_LEN("break"), + [FAIL_POINT_PRINT] = FP_TYPE_NM_LEN("print"), + [FAIL_POINT_SLEEP] = FP_TYPE_NM_LEN("sleep"), }; /** @@ -109,7 +115,7 @@ struct fail_point_entry { int fe_arg; /**< argument to type (e.g. return value) */ int fe_prob; /**< likelihood of firing in millionths */ int fe_count; /**< number of times to fire, 0 means always */ - + pid_t fe_pid; /**< only fail for this process */ TAILQ_ENTRY(fail_point_entry) fe_entries; /**< next entry in fail point */ }; @@ -120,7 +126,7 @@ fail_point_sleep(struct fail_point *fp, /* convert from millisecs to ticks, rounding up */ int timo = ((msecs * hz) + 999) / 1000; - if (timo) { + if (timo > 0) { if (fp->fp_sleep_fn == NULL) { msleep(fp, &g_fp_mtx, PWAIT, "failpt", timo); } else { @@ -191,19 +197,13 @@ fail_point_init(struct fail_point *fp, c void fail_point_destroy(struct fail_point *fp) { - struct fail_point_entry *ent; - if (fp->fp_flags & FAIL_POINT_DYNAMIC_NAME && fp->fp_name != NULL) { - fp_free((void *)(intptr_t)fp->fp_name); + if ((fp->fp_flags & FAIL_POINT_DYNAMIC_NAME) != 0) { + fp_free(__DECONST(void *, fp->fp_name)); fp->fp_name = NULL; } fp->fp_flags = 0; - - while (!TAILQ_EMPTY(&fp->fp_entries)) { - ent = TAILQ_FIRST(&fp->fp_entries); - TAILQ_REMOVE(&fp->fp_entries, ent, fe_entries); - fp_free(ent); - } + clear_entries(&fp->fp_entries); } /** @@ -222,16 +222,14 @@ fail_point_eval_nontrivial(struct fail_p FP_LOCK(); - ent = TAILQ_FIRST(&fp->fp_entries); - while (ent) { + TAILQ_FOREACH_SAFE(ent, &fp->fp_entries, fe_entries, next) { int cont = 0; /* don't continue by default */ - next = TAILQ_NEXT(ent, fe_entries); if (ent->fe_prob < PROB_MAX && - ent->fe_prob < random() % PROB_MAX) { - cont = 1; - goto loop_end; - } + ent->fe_prob < random() % PROB_MAX) + continue; + if (ent->fe_pid != NO_PID && ent->fe_pid != curproc->p_pid) + continue; switch (ent->fe_type) { case FAIL_POINT_PANIC: @@ -239,13 +237,14 @@ fail_point_eval_nontrivial(struct fail_p /* NOTREACHED */ case FAIL_POINT_RETURN: - if (return_value) + if (return_value != NULL) *return_value = ent->fe_arg; ret = FAIL_POINT_RC_RETURN; break; case FAIL_POINT_BREAK: - printf("fail point %s breaking to debugger\n", fp->fp_name); + printf("fail point %s breaking to debugger\n", + fp->fp_name); breakpoint(); break; @@ -273,13 +272,9 @@ fail_point_eval_nontrivial(struct fail_p break; } - if (ent && ent->fe_count > 0 && --ent->fe_count == 0) + if (ent != NULL && ent->fe_count > 0 && --ent->fe_count == 0) free_entry(&fp->fp_entries, ent); - -loop_end: - if (cont) - ent = next; - else + if (cont == 0) break; } @@ -290,7 +285,7 @@ loop_end: FP_UNLOCK(); - return ret; + return (ret); } /** @@ -320,9 +315,11 @@ fail_point_get(struct fail_point *fp, st } if (ent->fe_count > 0) sbuf_printf(sb, "%d*", ent->fe_count); - sbuf_printf(sb, "%s", fail_type_strings[ent->fe_type]); + sbuf_printf(sb, "%s", fail_type_strings[ent->fe_type].name); if (ent->fe_arg) sbuf_printf(sb, "(%d)", ent->fe_arg); + if (ent->fe_pid != NO_PID) + sbuf_printf(sb, "[pid %d]", ent->fe_pid); if (TAILQ_NEXT(ent, fe_entries)) sbuf_printf(sb, "->"); } @@ -380,7 +377,7 @@ fail_point_set(struct fail_point *fp, ch fp->fp_name, fp->fp_location, buf); #endif /* IWARNING */ - return error; + return (error); } #define MAX_FAIL_POINT_BUF 1023 @@ -422,9 +419,8 @@ fail_point_sysctl(SYSCTL_HANDLER_ARGS) } out: - if (buf) - fp_free(buf); - return error; + fp_free(buf); + return (error); } /** @@ -437,12 +433,17 @@ parse_fail_point(struct fail_point_entri /* :: * ( "->" )* */ - if (!(p = parse_term(ents, p))) - return 0; - while (*p) - if (p[0] != '-' || p[1] != '>' || !(p = parse_term(ents, p+2))) - return 0; - return p; + p = parse_term(ents, p); + if (p == NULL) + return (NULL); + while (*p != '\0') { + if (p[0] != '-' || p[1] != '>') + return (NULL); + p = parse_term(ents, p + 2); + if (p == NULL) + return (NULL); + } + return (p); } /** @@ -455,6 +456,7 @@ parse_term(struct fail_point_entries *en ent = fp_malloc(sizeof *ent, M_WAITOK | M_ZERO); ent->fe_prob = PROB_MAX; + ent->fe_pid = NO_PID; TAILQ_INSERT_TAIL(ents, ent, fe_entries); /* @@ -462,14 +464,16 @@ parse_term(struct fail_point_entries *en * ( ( "%") | ( "*" ) )* * * [ "(" ")" ] + * [ "[pid " "]" ] */ /* ( ( "%") | ( "*" ) )* */ - while (('0' <= *p && *p <= '9') || *p == '.') { + while (isdigit(*p) || *p == '.') { int units, decimal; - if (!(p = parse_number(&units, &decimal, p))) - return 0; + p = parse_number(&units, &decimal, p); + if (p == NULL) + return (NULL); if (*p == '%') { if (units > 100) /* prevent overflow early */ @@ -477,37 +481,44 @@ parse_term(struct fail_point_entries *en ent->fe_prob = units * (PROB_MAX / 100) + decimal; if (ent->fe_prob > PROB_MAX) ent->fe_prob = PROB_MAX; - } else if (*p == '*') { if (!units || decimal) - return 0; + return (NULL); ent->fe_count = units;; - - } else { - return 0; - } - + } else + return (NULL); p++; } /* */ - if (!(p = parse_type(ent, p))) - return 0; + p = parse_type(ent, p); + if (p == NULL) + return (NULL); if (*p == '\0') - return p; + return (p); /* [ "(" ")" ] */ if (*p != '(') return p; p++; - if (('0' <= *p && *p <= '9') || *p == '-') - ent->fe_arg = strtol(p, &p, 0); - else - return 0; + if (!isdigit(*p) && *p != '-') + return (NULL); + ent->fe_arg = strtol(p, &p, 0); if (*p++ != ')') - return 0; + return (NULL); + + /* [ "[pid " "]" ] */ +#define PID_STRING "[pid " + if (strncmp(p, PID_STRING, sizeof(PID_STRING) - 1) != 0) + return (p); + p += sizeof(PID_STRING) - 1; + if (!isdigit(*p)) + return (NULL); + ent->fe_pid = strtol(p, &p, 0); + if (*p++ != ']') + return (NULL); - return p; + return (p); } /** @@ -528,14 +539,14 @@ parse_number(int *out_units, int *out_de old_p = p; *out_units = strtol(p, &p, 10);; if (p == old_p && *p != '.') - return 0; + return (NULL); /* fractional part */ *out_decimal = 0; if (*p == '.') { int digits = 0; p++; - while ('0' <= *p && *p <= '9') { + while (isdigit(*p)) { int digit = *p - '0'; if (digits < PROB_DIGITS - 2) *out_decimal = *out_decimal * 10 + digit; @@ -545,12 +556,12 @@ parse_number(int *out_units, int *out_de p++; } if (!digits) /* need at least one digit after '.' */ - return 0; + return (NULL); while (digits++ < PROB_DIGITS - 2) /* add implicit zeros */ *out_decimal *= 10; } - return p; /* success */ + return (p); /* success */ } /** @@ -560,21 +571,16 @@ static char * parse_type(struct fail_point_entry *ent, char *beg) { enum fail_point_t type; - char *end = beg; - while ('a' <= *end && *end <= 'z') - end++; - if (beg == end) - return 0; - for (type = FAIL_POINT_OFF; type != FAIL_POINT_INVALID; type++) { - const char *p = fail_type_strings[type]; - const char *q = beg; - while (q < end && *p++ == *q++); - if (q == end && *p == '\0') { + int len; + + for (type = FAIL_POINT_OFF; type < FAIL_POINT_NUMTYPES; type++) { + len = fail_type_strings[type].nmlen; + if (strncmp(fail_type_strings[type].name, beg, len) == 0) { ent->fe_type = type; - return end; + return (beg + len); } } - return 0; + return (NULL); } /** @@ -595,6 +601,7 @@ static void clear_entries(struct fail_point_entries *ents) { struct fail_point_entry *ent, *ent_next; + TAILQ_FOREACH_SAFE(ent, ents, fe_entries, ent_next) fp_free(ent); TAILQ_INIT(ents);