----- 原始邮件 -----
发件人：Daniel Gryniewicz <dang@redhat.com>
收件人：devel@lists.nfs-ganesha.org
主题：[NFS-Ganesha-Devel] Re: Crash in mdcache_get_chunk
日期：2019年06月25日 01点01分

The entire chunk list was determined to be invalid, so it was removed
and replaced with cookie values. Realistically, you're not going to get
stable chunked readdir on 2.6; lots and lots of work has gone into it
since then. Non-whence-is-name should work pretty well in 2.7.4, and
everything should work well in the upcoming 2.7.5. Similarly for 2.8.x.
Daniel
On 6/24/19 11:07 AM, QR wrote:
> We are getting this crash with ganesha2.6.3.
> Did anyone see this backtrace before, if so what fixed it?
>
> (gdb) bt
> #0 0x0000000000518124 in __glist_add (left=0x7f4728044ae0, right=0x0,
> elt=0x7f46a0008680) at
> /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/include/gsh_list.h:79
> #1 0x0000000000518181 in glist_add (head=0x7f4728044ae0,
> elt=0x7f46a0008680) at
> /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/include/gsh_list.h:92
> #2 0x000000000051ad28 in mdcache_get_chunk (parent=0x7f479004c4d0,
> prev_chunk=0x7f4728044ae0)
> at
> /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_lru.c:902
> #3 0x0000000000533724 in mdcache_populate_dir_chunk
> (directory=0x7f479004c4d0, whence=512, dirent=0x7f47735fc468,
> prev_chunk=0x7f4728044ae0, eod_met=0x7f47735fc467)
> at
> /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_helpers.c:2654
> #4 0x0000000000535294 in mdcache_readdir_chunked
> (directory=0x7f479004c4d0, whence=472, dir_state=0x7f47735fc780,
> cb=0x430a1e <populate_dirent>, attrmask=0, eod_met=0x7f47735fcc7b)
> at
> /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_helpers.c:3048
> #5 0x0000000000523520 in mdcache_readdir (dir_hdl=0x7f479004c508,
> whence=0x7f47735fc760, dir_state=0x7f47735fc780, cb=0x430a1e
> <populate_dirent>, attrmask=0, eod_met=0x7f47735fcc7b)
> at
> /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_handle.c:560
> #6 0x0000000000431318 in fsal_readdir (directory=0x7f479004c508,
> cookie=472, nbfound=0x7f47735fcc7c, eod_met=0x7f47735fcc7b, attrmask=0,
> cb=0x48af8c <nfs3_readdir_callback>,
> opaque=0x7f47735fcc30) at
> /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/FSAL/fsal_helper.c:1295
> #7 0x000000000048ad74 in nfs3_readdir (arg=0x7f46a000aaa8,
> req=0x7f46a000a3a0, res=0x7f46a000b670)
> at
> /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/Protocols/NFS/nfs3_readdir.c:289
> #8 0x0000000000454845 in nfs_rpc_process_request
> (reqdata=0x7f46a000a3a0) at
> /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/MainNFSD/nfs_worker_thread.c:1329
> #9 0x0000000000455004 in nfs_rpc_valid_NFS (req=0x7f46a000a3a0) at
> /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/MainNFSD/nfs_worker_thread.c:1564
> #10 0x00007f47eb9ea4d6 in svc_vc_decode (req=0x7f46a000a3a0) at
> /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/libntirpc/src/svc_vc.c:815
> #11 0x0000000000448249 in nfs_rpc_decode_request (xprt=0x7f46e803aba0,
> xdrs=0x7f46a00013b0)
> at
> /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/MainNFSD/nfs_rpc_dispatcher_thread.c:1341
> #12 0x00007f47eb9ea3e7 in svc_vc_recv (xprt=0x7f46e803aba0) at
> /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/libntirpc/src/svc_vc.c:788
> #13 0x00007f47eb9e6bc5 in svc_rqst_xprt_task (wpe=0x7f46e803adb8) at
> /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/libntirpc/src/svc_rqst.c:751
> #14 0x00007f47eb9e703a in svc_rqst_epoll_events (sr_rec=0x109bb10,
> n_events=1) at
> /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/libntirpc/src/svc_rqst.c:923
> #15 0x00007f47eb9e72dc in svc_rqst_epoll_loop (sr_rec=0x109bb10) at
> /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/libntirpc/src/svc_rqst.c:996
> #16 0x00007f47eb9e738f in svc_rqst_run_task (wpe=0x109bb10) at
> /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/libntirpc/src/svc_rqst.c:1032
> #17 0x00007f47eb9f049f in work_pool_thread (arg=0x7f46e803da10) at
> /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/libntirpc/src/work_pool.c:176
> #18 0x00007f47ebe12e25 in start_thread () from /lib64/libpthread.so.0
> #19 0x00007f47eb4dd34d in clone () from /lib64/libc.so.6
> (gdb) frame 1
> #1 0x0000000000518181 in glist_add (head=0x7f4728044ae0,
> elt=0x7f46a0008680) at
> /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/include/gsh_list.h:92
> 92in
> /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/include/gsh_list.h
> (gdb) p head->prev
> $8 = (struct glist_head *) 0x0
> (gdb) p head
> $9 = (struct glist_head *) 0x7f4728044ae0
>
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