Re: [Crash-utility] [PATCH] add a new command: ipcs
Hello Dave,
I cannot get all kernels at hand. So I have to ask you about the code.
Please show me.
(a) On these kernel versions:
2.6.9-89.ELxenU
2.6.15-1.2054_FC5
2.6.16.33-xen
2.6.18-1.2714.el5xen
2.6.18-36.el5xen
2.6.18-58.el5xen
2.6.18-152.el5xen
2.6.31 uniprocessor kernel
the command fails immediatedly with this error:
ipcs: cannot resolve "hugetlbfs_file_operations"
(b) On *all* RHEL5 2.6.18-era kernels, the message queue display
always fails like this:
------ Message Queues --------
KEY MSQID UID PERMS USED-BYTES MESSAGES
ipcs: invalid structure member offset: kern_ipc_perm_id
FILE: ipcs.c LINE: 899 FUNCTION: get_msg_info()
I want to see the struct msg_queue and struct struct kern_ipc_perm.
(c) On this 2.6.36-0.16.rc3.git0.fc15 Fedora kernel, it shows:
------ Shared Memory Segments ------
KEY SHMID UID PERMS BYTES NATTCH STATUS
ipcs: invalid kernel virtual address: 10 type: "nsproxy.ipc_ns"
what is struct nsproxy? Or is there any symbol referring to ipc_ns?
(d) On *all* RHEL4 2.6.9-era and SLES9 2.6.5-era kernels, the command fail like this:
------ Shared Memory Segments ------
KEY SHMID UID PERMS BYTES NATTCH STATUS
ipcs: invalid structure member offset: ipc_id_ary_p
FILE: ipcs.c LINE: 540 FUNCTION: ipc_search_array()
or this:
------ Shared Memory Segments ------
KEY SHMID UID PERMS BYTES NATTCH STATUS
(none allocated)------ Semaphore Arrays --------
KEY SEMID UID PERMS NSEMS
ipcs: invalid structure member offset: ipc_id_ary_p
FILE: ipcs.c LINE: 540 FUNCTION: ipc_search_array()
what is struct ipc_id? And what is entries in struct ipc_id or something
similar to it?
It would be preferable if you could support all 2.6-era kernels, but if not,
the command should handle them more gracefully by pre-verifying the offsets
before using them, and if they are invalid, then use the option_not_supported()
routine.
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Regards
Qiao Nuohan