Re: [Crash-utility] [PATCH] deduplicate kernel_version open-coded parser

Date: Mon, 14 Aug 2023 09:41:12 -0400 From: Rafael Aquini <aquini(a)redhat.com&gt; To: crash-utility(a)redhat.com Cc: raquini(a)redhat.com Subject: [Crash-utility] [PATCH] deduplicate kernel_version open-coded parser Message-ID: <20230814134112.232436-1-aquini(a)redhat.com&gt; The code that parses kernel version from OSRELEASE/UTSRELEASE strings and populates the global kernel table is duplicated across the codebase for no good reason. This commit consolidates all the duplicated parsing code into a single method to remove the unnecessary duplicated code.

Signed-off-by: Rafael Aquini <aquini(a)redhat.com&gt; --- arm64.c | 27 +++---------------- defs.h | 2 ++ kernel.c | 77 ++++++++++++++++++++++++++----------------------------- riscv64.c | 25 ++---------------- 4 files changed, 43 insertions(+), 88 deletions(-) diff --git a/arm64.c b/arm64.c index 67b1a22..39d5f04 100644 --- a/arm64.c +++ b/arm64.c @@ -834,35 +834,14 @@ static struct kernel_va_range_handler kernel_va_range_handlers[] = { static unsigned long arm64_get_kernel_version(void) { char *string; - char buf[BUFSIZE]; - char *p1, *p2; if (THIS_KERNEL_VERSION) return THIS_KERNEL_VERSION; - string = pc->read_vmcoreinfo("OSRELEASE"); - if (string) { - strcpy(buf, string); - - p1 = p2 = buf; - while (*p2 != '.') - p2++; - *p2 = NULLCHAR; - kt->kernel_version[0] = atoi(p1); - - p1 = ++p2; - while (*p2 != '.') - p2++; - *p2 = NULLCHAR; - kt->kernel_version[1] = atoi(p1); - - p1 = ++p2; - while ((*p2 >= '0') && (*p2 <= '9')) - p2++; - *p2 = NULLCHAR; - kt->kernel_version[2] = atoi(p1); + if ((string = pc->read_vmcoreinfo("OSRELEASE"))) { + parse_kernel_version(string); + free(string); } - free(string); return THIS_KERNEL_VERSION; } diff --git a/defs.h b/defs.h index 5ee60f1..1925148 100644 --- a/defs.h +++ b/defs.h @@ -6032,6 +6032,8 @@ void clone_bt_info(struct bt_info *, struct bt_info *, struct task_context *); void dump_kernel_table(int); void dump_bt_info(struct bt_info *, char *where); void dump_log(int); +void parse_kernel_version(char *); + #define LOG_LEVEL(v) ((v) & 0x07) #define SHOW_LOG_LEVEL (0x1) #define SHOW_LOG_DICT (0x2) diff --git a/kernel.c b/kernel.c index 2114700..988206b 100644 --- a/kernel.c +++ b/kernel.c @@ -104,6 +104,38 @@ static void check_vmcoreinfo(void); static int is_pvops_xen(void); static int get_linux_banner_from_vmlinux(char *, size_t); +/* + * popuplate the global kernel table (kt) with kernel version + * information parsed from UTSNAME/OSRELEASE string + */ +void +parse_kernel_version(char *str) +{ + char *p1, *p2, separator; + + p1 = p2 = str; + while (*p2 != '.' && *p2 != '\0') + p2++; + + *p2 = NULLCHAR; + kt->kernel_version[0] = atoi(p1); + p1 = ++p2; + while (*p2 != '.' && *p2 != '-' && *p2 != '\0') + p2++; + + separator = *p2; + *p2 = NULLCHAR; + kt->kernel_version[1] = atoi(p1); + + if (separator == '.') { + p1 = ++p2; + while ((*p2 >= '0') && (*p2 <= '9')) + p2++; + + *p2 = NULLCHAR; + kt->kernel_version[2] = atoi(p1); + } +} /* * Gather a few kernel basics. @@ -112,7 +144,7 @@ void kernel_init() { int i, c; - char *p1, *p2, buf[BUFSIZE]; + char buf[BUFSIZE]; struct syment *sp1, *sp2; char *rqstruct; char *rq_timestamp_name = NULL; @@ -270,28 +302,7 @@ kernel_init() if (buf[64]) buf[64] = NULLCHAR; if (ascii_string(kt->utsname.release)) { - char separator; - - p1 = p2 = buf; - while (*p2 != '.') - p2++; - *p2 = NULLCHAR; - kt->kernel_version[0] = atoi(p1); - p1 = ++p2; - while (*p2 != '.' && *p2 != '-' && *p2 != '\0') - p2++; - separator = *p2; - *p2 = NULLCHAR; - kt->kernel_version[1] = atoi(p1); - *p2 = separator; - if (*p2 == '.') { - p1 = ++p2; - while ((*p2 >= '0') && (*p2 <= '9')) - p2++; - *p2 = NULLCHAR; - kt->kernel_version[2] = atoi(p1); - } else - kt->kernel_version[2] = 0; + parse_kernel_version(buf); if (CRASHDEBUG(1)) fprintf(fp, "base kernel version: %d.%d.%d\n", @@ -10973,8 +10984,6 @@ void get_log_from_vmcoreinfo(char *file) { char *string; - char buf[BUFSIZE]; - char *p1, *p2; struct vmcoreinfo_data *vmc = &kt->vmcoreinfo; if (!(pc->flags2 & VMCOREINFO)) @@ -10986,22 +10995,8 @@ get_log_from_vmcoreinfo(char *file) if ((string = pc->read_vmcoreinfo("OSRELEASE"))) { if (CRASHDEBUG(1)) fprintf(fp, "OSRELEASE: %s\n", string); - strcpy(buf, string); - p1 = p2 = buf; - while (*p2 != '.') - p2++; - *p2 = NULLCHAR; - kt->kernel_version[0] = atoi(p1); - p1 = ++p2; - while (*p2 != '.') - p2++; - *p2 = NULLCHAR; - kt->kernel_version[1] = atoi(p1); - p1 = ++p2; - while ((*p2 >= '0') && (*p2 <= '9')) - p2++; - *p2 = NULLCHAR; - kt->kernel_version[2] = atoi(p1); + + parse_kernel_version(string); if (CRASHDEBUG(1)) fprintf(fp, "base kernel version: %d.%d.%d\n", diff --git a/riscv64.c b/riscv64.c index 6b9a688..066cf2c 100644 --- a/riscv64.c +++ b/riscv64.c @@ -259,33 +259,12 @@ riscv64_processor_speed(void) static unsigned long riscv64_get_kernel_version(void) { char *string; - char buf[BUFSIZE]; - char *p1, *p2; if (THIS_KERNEL_VERSION) return THIS_KERNEL_VERSION; - string = pc->read_vmcoreinfo("OSRELEASE"); - if (string) { - strcpy(buf, string); - - p1 = p2 = buf; - while (*p2 != '.') - p2++; - *p2 = NULLCHAR; - kt->kernel_version[0] = atoi(p1); - - p1 = ++p2; - while (*p2 != '.') - p2++; - *p2 = NULLCHAR; - kt->kernel_version[1] = atoi(p1); - - p1 = ++p2; - while ((*p2 >= '0') && (*p2 <= '9')) - p2++; - *p2 = NULLCHAR; - kt->kernel_version[2] = atoi(p1); + if ((string = pc->read_vmcoreinfo("OSRELEASE"))) { + parse_kernel_version(string); free(string); } return THIS_KERNEL_VERSION; -- 2.41.0