From 93c95e526a4ef00eb3d5a1e0920ba5a22f32e40d Mon Sep 17 00:00:00 2001 From: Jessica Yu Date: Fri, 6 Mar 2020 17:02:05 +0100 Subject: [PATCH] modpost: rework and consolidate logging interface Rework modpost's logging interface by consolidating merror(), warn(), and fatal() to use a single function, modpost_log(). Introduce different logging levels (WARN, ERROR, FATAL) as well. The purpose of this cleanup is to reduce code duplication when deciding whether or not to warn or error out based on a condition. Signed-off-by: Jessica Yu Signed-off-by: Masahiro Yamada --- scripts/mod/modpost.c | 71 ++++++++++++++++++------------------------- scripts/mod/modpost.h | 14 +++++++-- 2 files changed, 41 insertions(+), 44 deletions(-) diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c index 7edfdb2f4497..a6f7b309ac45 100644 --- a/scripts/mod/modpost.c +++ b/scripts/mod/modpost.c @@ -51,41 +51,33 @@ enum export { #define MODULE_NAME_LEN (64 - sizeof(Elf_Addr)) -#define PRINTF __attribute__ ((format (printf, 1, 2))) - -PRINTF void fatal(const char *fmt, ...) +void __attribute__((format(printf, 2, 3))) +modpost_log(enum loglevel loglevel, const char *fmt, ...) { va_list arglist; - fprintf(stderr, "FATAL: "); + switch (loglevel) { + case LOG_WARN: + fprintf(stderr, "WARNING: "); + break; + case LOG_ERROR: + fprintf(stderr, "ERROR: "); + break; + case LOG_FATAL: + fprintf(stderr, "FATAL: "); + break; + default: /* invalid loglevel, ignore */ + break; + } + + fprintf(stderr, "modpost: "); va_start(arglist, fmt); vfprintf(stderr, fmt, arglist); va_end(arglist); - exit(1); -} - -PRINTF void warn(const char *fmt, ...) -{ - va_list arglist; - - fprintf(stderr, "WARNING: "); - - va_start(arglist, fmt); - vfprintf(stderr, fmt, arglist); - va_end(arglist); -} - -PRINTF void merror(const char *fmt, ...) -{ - va_list arglist; - - fprintf(stderr, "ERROR: "); - - va_start(arglist, fmt); - vfprintf(stderr, fmt, arglist); - va_end(arglist); + if (loglevel == LOG_FATAL) + exit(1); } static inline bool strends(const char *str, const char *postfix) @@ -113,7 +105,7 @@ static int is_vmlinux(const char *modname) void *do_nofail(void *ptr, const char *expr) { if (!ptr) - fatal("modpost: Memory allocation failure: %s.\n", expr); + fatal("Memory allocation failure: %s.\n", expr); return ptr; } @@ -2021,7 +2013,7 @@ static void read_symbols(const char *modname) license = get_modinfo(&info, "license"); if (!license && !is_vmlinux(modname)) - warn("modpost: missing MODULE_LICENSE() in %s\n" + warn("missing MODULE_LICENSE() in %s\n" "see include/linux/module.h for " "more information\n", modname); while (license) { @@ -2152,15 +2144,15 @@ static void check_for_gpl_usage(enum export exp, const char *m, const char *s) switch (exp) { case export_gpl: - fatal("modpost: GPL-incompatible module %s%s " + fatal("GPL-incompatible module %s%s " "uses GPL-only symbol '%s'\n", m, e, s); break; case export_unused_gpl: - fatal("modpost: GPL-incompatible module %s%s " + fatal("GPL-incompatible module %s%s " "uses GPL-only symbol marked UNUSED '%s'\n", m, e, s); break; case export_gpl_future: - warn("modpost: GPL-incompatible module %s%s " + warn("GPL-incompatible module %s%s " "uses future GPL-only symbol '%s'\n", m, e, s); break; case export_plain: @@ -2178,7 +2170,7 @@ static void check_for_unused(enum export exp, const char *m, const char *s) switch (exp) { case export_unused: case export_unused_gpl: - warn("modpost: module %s%s " + warn("module %s%s " "uses symbol '%s' marked UNUSED\n", m, e, s); break; default: @@ -2197,14 +2189,11 @@ static int check_exports(struct module *mod) exp = find_symbol(s->name); if (!exp || exp->module == mod) { if (have_vmlinux && !s->weak) { - if (warn_unresolved) { - warn("\"%s\" [%s.ko] undefined!\n", - s->name, mod->name); - } else { - merror("\"%s\" [%s.ko] undefined!\n", - s->name, mod->name); + modpost_log(warn_unresolved ? LOG_WARN : LOG_ERROR, + "\"%s\" [%s.ko] undefined!\n", + s->name, mod->name); + if (!warn_unresolved) err = 1; - } } continue; } @@ -2653,7 +2642,7 @@ int main(int argc, char **argv) if (dump_write) write_dump(dump_write); if (sec_mismatch_count && sec_mismatch_fatal) - fatal("modpost: Section mismatches detected.\n" + fatal("Section mismatches detected.\n" "Set CONFIG_SECTION_MISMATCH_WARN_ONLY=y to allow them.\n"); for (n = 0; n < SYMBOL_HASH_SIZE; n++) { struct symbol *s; diff --git a/scripts/mod/modpost.h b/scripts/mod/modpost.h index 64a82d2d85f6..60dca9b7106b 100644 --- a/scripts/mod/modpost.h +++ b/scripts/mod/modpost.h @@ -198,6 +198,14 @@ void *grab_file(const char *filename, unsigned long *size); char* get_next_line(unsigned long *pos, void *file, unsigned long size); void release_file(void *file, unsigned long size); -void fatal(const char *fmt, ...); -void warn(const char *fmt, ...); -void merror(const char *fmt, ...); +enum loglevel { + LOG_WARN, + LOG_ERROR, + LOG_FATAL +}; + +void modpost_log(enum loglevel loglevel, const char *fmt, ...); + +#define warn(fmt, args...) modpost_log(LOG_WARN, fmt, ##args) +#define merror(fmt, args...) modpost_log(LOG_ERROR, fmt, ##args) +#define fatal(fmt, args...) modpost_log(LOG_FATAL, fmt, ##args)