4:05 p.m.
On 2023/07/06 23:53, Dave Wysochanski wrote:
Today if crash fails to read some structure in a vmware
'vmsn' file,
it will throw an "No such file or directory" message. Such a generic
message does not give any clue as to the problem, but instead sounds
like the file may not exist when it does, for example:
$ crash ./vmcore.vmsn ./vmlinux
crash 8.0.3
...
crash: vmw: Failed to read './vmcore.vmsn': [Error 2] No such file or
directory
crash: ./vmcore.vmsn: initialization failed
$ ls -l ./vmcore.vmsn
-rwxrwxrwx. 7 myuser mygroup 12128999 Jul 4 07:21 ./vmcore.vmsn
Improve the above error message so we at least know which portion
of the file crash had difficulty reading. After this patch, the
above error looks like:
crash: vmw: Failed to read 'cptgroupdesc' from file './vmcore.vmsn':
[Error 2] No such file or directory
Signed-off-by: Dave Wysochanski <dwysocha(a)redhat.com>
Thank you for the improvement.
Acked-by: Kazuhito Hagio <k-hagio-ab(a)nec.com>
Thanks,
Kazu
> ---
> vmware_guestdump.c | 8 ++++----
> vmware_vmss.c | 24 ++++++++++++------------
> 2 files changed, 16 insertions(+), 16 deletions(-)
>
> diff --git a/vmware_guestdump.c b/vmware_guestdump.c
> index cf818e588a60..5be26c8e2e90 100644
> --- a/vmware_guestdump.c
> +++ b/vmware_guestdump.c
> @@ -117,8 +117,8 @@ is_vmware_guestdump(char *filename)
> }
>
> if (fread(&hdr, sizeof(struct guestdumpheader), 1, fp) != 1) {
> - error(INFO, LOGPRX"Failed to read '%s': [Error %d] %s\n",
> - filename, errno, strerror(errno));
> + error(INFO, LOGPRX"Failed to read '%s' from file '%s': [Error
%d] %s\n",
> + "guestdumpheader", filename, errno, strerror(errno));
> fclose(fp);
> return FALSE;
> }
> @@ -204,8 +204,8 @@ vmware_guestdump_init(char *filename, FILE *ofp)
>
> for (i = 0; i < vmss.num_vcpus; i++) {
> if (fread(&vs, sizeof(struct vcpu_state), 1, fp) != 1) {
> - error(INFO, LOGPRX"Failed to read '%s': [Error %d] %s\n",
> - filename, errno, strerror(errno));
> + error(INFO, LOGPRX"Failed to read '%s' from file '%s':
[Error %d] %s\n",
> + "vcpu_state", filename, errno, strerror(errno));
> result = FALSE;
> goto exit;
> }
> diff --git a/vmware_vmss.c b/vmware_vmss.c
> index f6c5f32ea4c0..8121ab64a99a 100644
> --- a/vmware_vmss.c
> +++ b/vmware_vmss.c
> @@ -39,8 +39,8 @@ is_vmware_vmss(char *filename)
> }
>
> if (fread(&hdr, sizeof(cptdumpheader), 1, fp) != 1) {
> - error(INFO, LOGPRX"Failed to read '%s': [Error %d] %s\n",
> - filename, errno, strerror(errno));
> + error(INFO, LOGPRX"Failed to read '%s' from file '%s': [Error
%d] %s\n",
> + "cptdumpheader", filename, errno, strerror(errno));
> fclose(fp);
> return FALSE;
> }
> @@ -86,8 +86,8 @@ vmware_vmss_init(char *filename, FILE *ofp)
> }
>
> if (fread(&hdr, sizeof(cptdumpheader), 1, fp) != 1) {
> - error(INFO, LOGPRX"Failed to read '%s': %s [Error %d] %s\n",
> - filename, errno, strerror(errno));
> + error(INFO, LOGPRX"Failed to read '%s' from file '%s': [Error
%d] %s\n",
> + "cptdumpheader", filename, errno, strerror(errno));
> result = FALSE;
> goto exit;
> }
> @@ -112,8 +112,8 @@ vmware_vmss_init(char *filename, FILE *ofp)
> }
>
> if (fread(grps, sizeof(cptgroupdesc), grpsize, fp) != grpsize) {
> - error(INFO, LOGPRX"Failed to read '%s': [Error %d] %s\n",
> - filename, errno, strerror(errno));
> + error(INFO, LOGPRX"Failed to read '%s' from file '%s': [Error
%d] %s\n",
> + "cptgroupdesc", filename, errno, strerror(errno));
> result = FALSE;
> goto exit;
> }
> @@ -225,8 +225,8 @@ vmware_vmss_init(char *filename, FILE *ofp)
> idx[0] < vmss.num_vcpus) {
> int cpu = idx[0];
> if (fread(vmss.regs64[cpu], VMW_GPREGS_SIZE, 1, fp) != 1) {
> - error(INFO, LOGPRX"Failed to read '%s': [Error %d] %s\n",
> - filename, errno, strerror(errno));
> + error(INFO, LOGPRX"Failed to read '%s' from file '%s':
[Error %d] %s\n",
> + name, filename, errno, strerror(errno));
> break;
> }
> DEBUG_PARSE_PRINT((ofp, "\n"));
> @@ -237,8 +237,8 @@ vmware_vmss_init(char *filename, FILE *ofp)
> int cpu = idx[0];
> DEBUG_PARSE_PRINT((ofp, "\t=> "));
> if (fread(&vmss.regs64[cpu]->cr[0], VMW_CR64_SIZE, 1, fp) != 1) {
> - error(INFO, LOGPRX"Failed to read '%s': [Error %d] %s\n",
> - filename, errno, strerror(errno));
> + error(INFO, LOGPRX"Failed to read '%s' from file '%s':
[Error %d] %s\n",
> + name, filename, errno, strerror(errno));
> break;
> }
> for (j = 0; j < VMW_CR64_SIZE / 8; j++)
> @@ -257,8 +257,8 @@ vmware_vmss_init(char *filename, FILE *ofp)
> break;
> }
> if (fread(&idtr, sizeof(idtr), 1, fp) != 1) {
> - error(INFO, LOGPRX"Failed to read '%s': [Error %d] %s\n",
> - filename, errno, strerror(errno));
> + error(INFO, LOGPRX"Failed to read '%s' from file '%s':
[Error %d] %s\n",
> + name, filename, errno, strerror(errno));
> break;
> }
> DEBUG_PARSE_PRINT((ofp, "\n"));