Hi, Dave
Thanks for your improvement.
On Fri, Jul 7, 2023 at 2:17 PM <crash-utility-request@xxxxxxxxxx> wrote:
Date: Thu, 6 Jul 2023 10:53:18 -0400
From: Dave Wysochanski <dwysocha@xxxxxxxxxx>
To: crash-utility@xxxxxxxxxx
Cc: dwysocha@xxxxxxxxxx, amakhalov@xxxxxxxxxx, soakley@xxxxxxxxxx
Subject: [Crash-utility] [PATCH] vmware: Improve output when we fail
to read vmware 'vmsn' file
Message-ID: <20230706145318.731449-1-dwysocha@xxxxxxxxxx>
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@xxxxxxxxxx>
---
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));
^^^^^^^^^^^^
Although the above code is good, I tend to output constant strings directly rather than using the '%s' to print.
Anyway, the other changes still look fine to me. So: Ack.
Thanks
Lianbo
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"));
--
2.39.3
-- Crash-utility mailing list Crash-utility@xxxxxxxxxx https://listman.redhat.com/mailman/listinfo/crash-utility Contribution Guidelines: https://github.com/crash-utility/crash/wiki
