[PATCH v2] dump-dmesg: Understand >= v3.11-rc4 dmesg
Atsushi Kumagai
kumagai-atsushi at mxc.nes.nec.co.jp
Fri Sep 20 00:15:59 EDT 2013
Hello Lubomir,
(2013/09/18 22:59), Lubomir Rintel wrote:
> Symbol name changed with the following commit:
> 62e32ac printk: rename struct log to struct printk_log
>
> Signed-off-by: Lubomir Rintel <lkundrak at v3.sk>
> Cc: Louis Bouchard <louis.bouchard at canonical.com>
> Cc: Masaki Tachibana <tachibana at mxm.nes.nec.co.jp>
> Cc: Minoru Usui <usui at mxm.nes.nec.co.jp>
> Cc: Daisuke Nishimura <nishimura at mxp.nes.nec.co.jp>
> Cc: Atsushi Kumagai <kumagai-atsushi at mxc.nes.nec.co.jp>
> ---
> So, the change did make it into 3.11.
> Does this make sense?
Thanks, I'll merge this patch with the small change below:
diff --git a/makedumpfile.c b/makedumpfile.c
index ca27987..c21d113 100644
--- a/makedumpfile.c
+++ b/makedumpfile.c
@@ -49,7 +49,6 @@ unsigned long long pfn_hwpoison;
unsigned long long num_dumped;
-int use_printk_log; /* did we read printk_log symbol name? */
int retcd = FAILED; /* return code */
#define INITIALIZE_LONG_TABLE(table, value) \
@@ -1392,12 +1391,12 @@ get_structure_info(void)
SIZE_INIT(printk_log, "printk_log");
if (SIZE(printk_log) != NOT_FOUND_STRUCTURE) {
- use_printk_log = 1;
+ info->flag_use_printk_log = TRUE;
OFFSET_INIT(printk_log.ts_nsec, "printk_log", "ts_nsec");
OFFSET_INIT(printk_log.len, "printk_log", "len");
OFFSET_INIT(printk_log.text_len, "printk_log", "text_len");
} else {
- use_printk_log = 0;
+ info->flag_use_printk_log = FALSE;
SIZE_INIT(printk_log, "log");
OFFSET_INIT(printk_log.ts_nsec, "log", "ts_nsec");
OFFSET_INIT(printk_log.len, "log", "len");
@@ -1603,7 +1602,7 @@ write_vmcoreinfo_data(void)
WRITE_STRUCTURE_SIZE("node_memblk_s", node_memblk_s);
WRITE_STRUCTURE_SIZE("nodemask_t", nodemask_t);
WRITE_STRUCTURE_SIZE("pageflags", pageflags);
- if (use_printk_log)
+ if (info->flag_use_printk_log)
WRITE_STRUCTURE_SIZE("printk_log", printk_log);
else
WRITE_STRUCTURE_SIZE("log", printk_log);
@@ -1641,7 +1640,7 @@ write_vmcoreinfo_data(void)
WRITE_MEMBER_OFFSET("vm_struct.addr", vm_struct.addr);
WRITE_MEMBER_OFFSET("vmap_area.va_start", vmap_area.va_start);
WRITE_MEMBER_OFFSET("vmap_area.list", vmap_area.list);
- if (use_printk_log) {
+ if (info->flag_use_printk_log) {
WRITE_MEMBER_OFFSET("printk_log.ts_nsec", printk_log.ts_nsec);
WRITE_MEMBER_OFFSET("printk_log.len", printk_log.len);
WRITE_MEMBER_OFFSET("printk_log.text_len", printk_log.text_len);
@@ -1962,12 +1961,12 @@ read_vmcoreinfo(void)
READ_STRUCTURE_SIZE("printk_log", printk_log);
if (SIZE(printk_log) != NOT_FOUND_STRUCTURE) {
- use_printk_log = 1;
+ info->flag_use_printk_log = TRUE;
READ_MEMBER_OFFSET("printk_log.ts_nsec", printk_log.ts_nsec);
READ_MEMBER_OFFSET("printk_log.len", printk_log.len);
READ_MEMBER_OFFSET("printk_log.text_len", printk_log.text_len);
} else {
- use_printk_log = 0;
+ info->flag_use_printk_log = FALSE;
READ_STRUCTURE_SIZE("log", printk_log);
READ_MEMBER_OFFSET("log.ts_nsec", printk_log.ts_nsec);
READ_MEMBER_OFFSET("log.len", printk_log.len);
diff --git a/makedumpfile.h b/makedumpfile.h
index d244b83..3a7e61a 100644
--- a/makedumpfile.h
+++ b/makedumpfile.h
@@ -893,6 +893,7 @@ struct DumpInfo {
int flag_force; /* overwrite existing stuff */
int flag_exclude_xen_dom;/* exclude Domain-U from xen-kdump */
int flag_dmesg; /* dump the dmesg log out of the vmcore file */
+ int flag_use_printk_log; /* did we read printk_log symbol name? */
int flag_nospace; /* the flag of "No space on device" error */
unsigned long vaddr_for_vtop; /* virtual address for debugging */
long page_size; /* size of page */
@@ -1176,6 +1177,7 @@ struct size_table {
long list_head;
long node_memblk_s;
long nodemask_t;
+ long printk_log;
/*
* for Xen extraction
@@ -1198,8 +1200,6 @@ struct size_table {
long cpumask_t;
long kexec_segment;
long elf64_hdr;
- long printk_log;
- long log;
long pageflags;
};
Thanks
Atsushi Kumagai
> Changes for v2:
> * Only back values for symbol names we did actually read; either "log"
> or "printk_log"
>
> makedumpfile.c | 66 ++++++++++++++++++++++++++++++++++++++++---------------
> makedumpfile.h | 5 ++-
> 2 files changed, 51 insertions(+), 20 deletions(-)
>
> diff --git a/makedumpfile.c b/makedumpfile.c
> index b42565c..6f00167 100644
> --- a/makedumpfile.c
> +++ b/makedumpfile.c
> @@ -49,6 +49,7 @@ unsigned long long pfn_hwpoison;
>
> unsigned long long num_dumped;
>
> +int use_printk_log; /* did we read printk_log symbol name? */
> int retcd = FAILED; /* return code */
>
> #define INITIALIZE_LONG_TABLE(table, value) \
> @@ -1389,10 +1390,19 @@ get_structure_info(void)
> OFFSET_INIT(elf64_phdr.p_paddr, "elf64_phdr", "p_paddr");
> OFFSET_INIT(elf64_phdr.p_memsz, "elf64_phdr", "p_memsz");
>
> - SIZE_INIT(log, "log");
> - OFFSET_INIT(log.ts_nsec, "log", "ts_nsec");
> - OFFSET_INIT(log.len, "log", "len");
> - OFFSET_INIT(log.text_len, "log", "text_len");
> + SIZE_INIT(printk_log, "printk_log");
> + if (SIZE(printk_log) != NOT_FOUND_STRUCTURE) {
> + use_printk_log = 1;
> + OFFSET_INIT(printk_log.ts_nsec, "printk_log", "ts_nsec");
> + OFFSET_INIT(printk_log.len, "printk_log", "len");
> + OFFSET_INIT(printk_log.text_len, "printk_log", "text_len");
> + } else {
> + use_printk_log = 0;
> + SIZE_INIT(printk_log, "log");
> + OFFSET_INIT(printk_log.ts_nsec, "log", "ts_nsec");
> + OFFSET_INIT(printk_log.len, "log", "len");
> + OFFSET_INIT(printk_log.text_len, "log", "text_len");
> + }
>
> return TRUE;
> }
> @@ -1593,7 +1603,10 @@ write_vmcoreinfo_data(void)
> WRITE_STRUCTURE_SIZE("node_memblk_s", node_memblk_s);
> WRITE_STRUCTURE_SIZE("nodemask_t", nodemask_t);
> WRITE_STRUCTURE_SIZE("pageflags", pageflags);
> - WRITE_STRUCTURE_SIZE("log", log);
> + if (use_printk_log)
> + WRITE_STRUCTURE_SIZE("printk_log", printk_log);
> + else
> + WRITE_STRUCTURE_SIZE("log", printk_log);
>
> /*
> * write the member offset of 1st kernel
> @@ -1628,9 +1641,16 @@ write_vmcoreinfo_data(void)
> WRITE_MEMBER_OFFSET("vm_struct.addr", vm_struct.addr);
> WRITE_MEMBER_OFFSET("vmap_area.va_start", vmap_area.va_start);
> WRITE_MEMBER_OFFSET("vmap_area.list", vmap_area.list);
> - WRITE_MEMBER_OFFSET("log.ts_nsec", log.ts_nsec);
> - WRITE_MEMBER_OFFSET("log.len", log.len);
> - WRITE_MEMBER_OFFSET("log.text_len", log.text_len);
> + if (use_printk_log) {
> + WRITE_MEMBER_OFFSET("printk_log.ts_nsec", printk_log.ts_nsec);
> + WRITE_MEMBER_OFFSET("printk_log.len", printk_log.len);
> + WRITE_MEMBER_OFFSET("printk_log.text_len", printk_log.text_len);
> + } else {
> + /* Compatibility with pre-3.11-rc4 */
> + WRITE_MEMBER_OFFSET("log.ts_nsec", printk_log.ts_nsec);
> + WRITE_MEMBER_OFFSET("log.len", printk_log.len);
> + WRITE_MEMBER_OFFSET("log.text_len", printk_log.text_len);
> + }
>
> if (SYMBOL(node_data) != NOT_FOUND_SYMBOL)
> WRITE_ARRAY_LENGTH("node_data", node_data);
> @@ -1909,7 +1929,6 @@ read_vmcoreinfo(void)
> READ_STRUCTURE_SIZE("node_memblk_s", node_memblk_s);
> READ_STRUCTURE_SIZE("nodemask_t", nodemask_t);
> READ_STRUCTURE_SIZE("pageflags", pageflags);
> - READ_STRUCTURE_SIZE("log", log);
>
> READ_MEMBER_OFFSET("page.flags", page.flags);
> READ_MEMBER_OFFSET("page._count", page._count);
> @@ -1940,9 +1959,20 @@ read_vmcoreinfo(void)
> READ_MEMBER_OFFSET("vm_struct.addr", vm_struct.addr);
> READ_MEMBER_OFFSET("vmap_area.va_start", vmap_area.va_start);
> READ_MEMBER_OFFSET("vmap_area.list", vmap_area.list);
> - READ_MEMBER_OFFSET("log.ts_nsec", log.ts_nsec);
> - READ_MEMBER_OFFSET("log.len", log.len);
> - READ_MEMBER_OFFSET("log.text_len", log.text_len);
> +
> + READ_STRUCTURE_SIZE("printk_log", printk_log);
> + if (SIZE(printk_log) != NOT_FOUND_STRUCTURE) {
> + use_printk_log = 1;
> + READ_MEMBER_OFFSET("printk_log.ts_nsec", printk_log.ts_nsec);
> + READ_MEMBER_OFFSET("printk_log.len", printk_log.len);
> + READ_MEMBER_OFFSET("printk_log.text_len", printk_log.text_len);
> + } else {
> + use_printk_log = 0;
> + READ_STRUCTURE_SIZE("log", printk_log);
> + READ_MEMBER_OFFSET("log.ts_nsec", printk_log.ts_nsec);
> + READ_MEMBER_OFFSET("log.len", printk_log.len);
> + READ_MEMBER_OFFSET("log.text_len", printk_log.text_len);
> + }
>
> READ_ARRAY_LENGTH("node_data", node_data);
> READ_ARRAY_LENGTH("pgdat_list", pgdat_list);
> @@ -3705,13 +3735,13 @@ dump_log_entry(char *logptr, int fp)
> ulonglong nanos;
> ulong rem;
>
> - text_len = USHORT(logptr + OFFSET(log.text_len));
> - ts_nsec = ULONGLONG(logptr + OFFSET(log.ts_nsec));
> + text_len = USHORT(logptr + OFFSET(printk_log.text_len));
> + ts_nsec = ULONGLONG(logptr + OFFSET(printk_log.ts_nsec));
>
> nanos = (ulonglong)ts_nsec / (ulonglong)1000000000;
> rem = (ulonglong)ts_nsec % (ulonglong)1000000000;
>
> - msg = logptr + SIZE(log);
> + msg = logptr + SIZE(printk_log);
>
> sprintf(buf, "[%5lld.%06ld] ", nanos, rem/1000);
>
> @@ -3749,7 +3779,7 @@ log_from_idx(unsigned int idx, char *logbuf)
> * the buffer.
> */
>
> - msglen = USHORT(logptr + OFFSET(log.len));
> + msglen = USHORT(logptr + OFFSET(printk_log.len));
> if (!msglen)
> logptr = logbuf;
>
> @@ -3770,9 +3800,9 @@ log_next(unsigned int idx, char *logbuf)
> * return the one after that.
> */
>
> - msglen = USHORT(logptr + OFFSET(log.len));
> + msglen = USHORT(logptr + OFFSET(printk_log.len));
> if (!msglen) {
> - msglen = USHORT(logbuf + OFFSET(log.len));
> + msglen = USHORT(logbuf + OFFSET(printk_log.len));
> return msglen;
> }
>
> diff --git a/makedumpfile.h b/makedumpfile.h
> index a5826e0..c33852a 100644
> --- a/makedumpfile.h
> +++ b/makedumpfile.h
> @@ -1198,6 +1198,7 @@ struct size_table {
> long cpumask_t;
> long kexec_segment;
> long elf64_hdr;
> + long printk_log;
> long log;
>
> long pageflags;
> @@ -1337,11 +1338,11 @@ struct offset_table {
> long p_memsz;
> } elf64_phdr;
>
> - struct log_s {
> + struct printk_log_s {
> long ts_nsec;
> long len;
> long text_len;
> - } log;
> + } printk_log;
>
> };
>
>
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