Messages in this thread | | | Date | Mon, 11 Jul 2005 02:37:31 -0400 | From | Xin Zhao <> | Subject | NFS and RPC question under kernel 2.6 |
| |
Sorry if this question is dumb.
I am trying to modify NFS to add some more features. I changed the rpc_clnt struct in include/linux/sunrpc/clnt.h to add some more fields:
vrpc_comm_t *cl_comm; wait_queue_head_t cl_callwaitq[MAX_PENDING_REQS]; int cl_blocked[MAX_PENDING_REQS]; /* indicates whether a request is blocked */ svdif_response_t cl_resp_ring[MAX_PENDING_REQS];
I tried to initialise those fields in nfs_fill_super function, but once those initialization codes are executed, if a nfs client tries to mount a directory, its underlying linux will crash with the following dump out:
Unable to handle kernel NULL pointer dereference at virtual address 00000008 printing eip: d085ff29 *pde = ma 00000000 pa 55555000 [<c01e5564>] snprintf+0x27/0x2b [<d086002b>] nfs_sb_init+0x9a/0x527 [nfs] [<d08344c6>] unx_create+0x4e/0x6b [sunrpc] [<d08338cb>] rpcauth_create+0x6a/0xb1 [sunrpc] [<d082e212>] rpc_create_client+0x18a/0x269 [sunrpc] [<d086057c>] nfs_create_client+0xc4/0x138 [nfs] [<d084f4bb>] lockd_up+0xd0/0x13d [lockd] [<d08608ce>] nfs_fill_super+0x2de/0x36c [nfs] [<d0862821>] nfs_get_sb+0x231/0x265 [nfs] [<c0158cdc>] do_kern_mount+0x4f/0xc5 [<c016dfd4>] do_new_mount+0x82/0xc3 [<c016e687>] do_mount+0x179/0x197 [<c016e4c3>] copy_mount_options+0x54/0x9f [<c016ea38>] sys_mount+0x9f/0xe0 [<c0108e2c>] syscall_call+0x7/0xb
My initialization codes work well on kernel 2.4, but do not work on 2.6. :( I was stuck on this problem for a couple of days.
Can someone help me out? Many thanks in advance!!!
BTW: after I change clnt.h, I recompiled the kernel and restart the machine, so kernel should know rpc_clnt struct is changed.
-x - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |