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Signed-off-by: Tigran Mkrtchyan <tigran.mkrtchyan@desy.de>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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Chris Worley reports:
RIP: 0010:[<ffffffffa0245f80>] [<ffffffffa0245f80>] rpc_new_client+0x2a0/0x2e0 [sunrpc]
RSP: 0018:ffff880158f6f548 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff880234f8bc00 RCX: 000000000000ea60
RDX: 0000000000074cc0 RSI: 000000000000ea60 RDI: ffff880234f8bcf0
RBP: ffff880158f6f588 R08: 000000000001ac80 R09: ffff880237003300
R10: ffff880201171000 R11: ffffea0000d75200 R12: ffffffffa03afc60
R13: ffff880230c18800 R14: 0000000000000000 R15: ffff880158f6f680
FS: 00007f0e32673740(0000) GS:ffff88023fc40000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 0000000000000008 CR3: 0000000234886000 CR4: 00000000001406e0
Stack:
ffffffffa047a680 0000000000000000 ffff880158f6f598 ffff880158f6f680
ffff880158f6f680 ffff880234d11d00 ffff88023357f800 ffff880158f6f7d0
ffff880158f6f5b8 ffffffffa024660a ffff880158f6f5b8 ffffffffa02492ec
Call Trace:
[<ffffffffa024660a>] rpc_create_xprt+0x1a/0xb0 [sunrpc]
[<ffffffffa02492ec>] ? xprt_create_transport+0x13c/0x240 [sunrpc]
[<ffffffffa0246766>] rpc_create+0xc6/0x1a0 [sunrpc]
[<ffffffffa038e695>] nfs_create_rpc_client+0xf5/0x140 [nfs]
[<ffffffffa038f31a>] nfs_init_client+0x3a/0xd0 [nfs]
[<ffffffffa038f22f>] nfs_get_client+0x25f/0x310 [nfs]
[<ffffffffa025cef8>] ? rpc_ntop+0xe8/0x100 [sunrpc]
[<ffffffffa047512c>] nfs3_set_ds_client+0xcc/0x100 [nfsv3]
[<ffffffffa041fa10>] nfs4_pnfs_ds_connect+0x120/0x400 [nfsv4]
[<ffffffffa03d41c7>] nfs4_ff_layout_prepare_ds+0xe7/0x330 [nfs_layout_flexfiles]
[<ffffffffa03d1b1b>] ff_layout_pg_init_write+0xcb/0x280 [nfs_layout_flexfiles]
[<ffffffffa03a14dc>] __nfs_pageio_add_request+0x12c/0x490 [nfs]
[<ffffffffa03a1fa2>] nfs_pageio_add_request+0xc2/0x2a0 [nfs]
[<ffffffffa03a0365>] ? nfs_pageio_init+0x75/0x120 [nfs]
[<ffffffffa03a5b50>] nfs_do_writepage+0x120/0x270 [nfs]
[<ffffffffa03a5d31>] nfs_writepage_locked+0x61/0xc0 [nfs]
[<ffffffff813d4115>] ? __percpu_counter_add+0x55/0x70
[<ffffffffa03a6a9f>] nfs_wb_single_page+0xef/0x1c0 [nfs]
[<ffffffff811ca4a3>] ? __dec_zone_page_state+0x33/0x40
[<ffffffffa0395b21>] nfs_launder_page+0x41/0x90 [nfs]
[<ffffffff811baba0>] invalidate_inode_pages2_range+0x340/0x3a0
[<ffffffff811bac17>] invalidate_inode_pages2+0x17/0x20
[<ffffffffa039960e>] nfs_release+0x9e/0xb0 [nfs]
[<ffffffffa0399570>] ? nfs_open+0x60/0x60 [nfs]
[<ffffffffa0394dad>] nfs_file_release+0x3d/0x60 [nfs]
[<ffffffff81226e6c>] __fput+0xdc/0x1e0
[<ffffffff81226fbe>] ____fput+0xe/0x10
[<ffffffff810bf2e4>] task_work_run+0xc4/0xe0
[<ffffffff810a4188>] do_exit+0x2e8/0xb30
[<ffffffff8102471c>] ? do_audit_syscall_entry+0x6c/0x70
[<ffffffff811464e6>] ? __audit_syscall_exit+0x1e6/0x280
[<ffffffff810a4a5f>] do_group_exit+0x3f/0xa0
[<ffffffff810a4ad4>] SyS_exit_group+0x14/0x20
[<ffffffff8179b76e>] system_call_fastpath+0x12/0x71
Which seems to be due to a call to utsname() when in a task exit context
in order to determine the hostname to set in rpc_new_client().
In reality, what we want here is not the hostname of the current task, but
the hostname that was used to set up the metadata server.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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lockd assumes hostname exists otherwise kernel oops.
It can be reproduced by following steps:
1. mount flexfile MDS
2. write some files
3. mount DS via nfsv3
BUG: unable to handle kernel NULL pointer dereference at (null)
IP: [<ffffffff8134f332>] strlen+0x2/0x20
PGD 0
Oops: 0000 [#1] SMP
Modules linked in: nfsd(F) nfs_layout_flexfiles(F) rpcsec_gss_krb5(F) auth_rpcgss(F) nfsv4(F) dns_resolver(F) nfsv3(F) nfs_acl(F) nfs(F) lockd(F) sunrpc(F) fscache(F) ebtable_nat(F) nf_conntrack_netbios_ns(F) nf_conntrack_broadcast(F) ipt_MASQUERADE(F) ip6table_nat(F) nf_nat_ipv6(F) ip6table_mangle(F) ip6t_REJECT(F) nf_conntrack_ipv6(F) nf_defrag_ipv6(F) iptable_nat(F) nf_nat_ipv4(F) nf_nat(F) iptable_mangle(F) nf_conntrack_ipv4(F) nf_defrag_ipv4(F) xt_conntrack(F) nf_conntrack(F) ebtable_filter(F) ebtables(F) ip6table_filter(F) ip6_tables(F) bnep(F) snd_ens1371(F) snd_rawmidi(F) snd_ac97_codec(F) btusb(F) ac97_bus(F) snd_seq(F) snd_seq_device(F) snd_pcm(F) ppdev(F) bluetooth(F) 6lowpan_iphc(F) rfkill(F) vmw_balloon(F) snd_timer(F) snd(F) soundcore(F) gameport(F) i2c_piix4(F) e1000(F) vmw_vmci(F) parport_pc(F) parport(F) shpchp(F) uinput(F) xfs(F) libcrc32c(F) vmwgfx(F) ttm(F) drm(F) mptspi(F) scsi_transport_spi(F) mptscsih(F) mptbase(F) i2c_core(F)
CPU: 0 PID: 10397 Comm: mount.nfs Tainted: GF 3.14.7-100.pd_client.001.fc16.x86_64 #1
Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 07/31/2013
task: ffff880008942600 ti: ffff880007990000 task.ti: ffff880007990000
RIP: 0010:[<ffffffff8134f332>] [<ffffffff8134f332>] strlen+0x2/0x20
RSP: 0018:ffff880007991aa0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff880038d39c20 RCX: 0000000000000004
RDX: 0000000000000006 RSI: 0000000000000010 RDI: 0000000000000000
RBP: ffff880007991b38 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000014600 R11: 0000000000000400 R12: ffffffff81cc8580
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000004
FS: 00007f90cd2ef880(0000) GS:ffff88003f600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000001710000 CR4: 00000000001407f0
Stack:
ffffffffa045f52c ffff880001782230 ffff880004141e28 0006880007991ac8
ffffffff816dc14b ffff880000000000 ffff880038d39c20 0000000000000010
0000000481cc0006 0000000000000000 ffffffffa0410be8 000000000000c014
Call Trace:
[<ffffffffa045f52c>] ? nlmclnt_lookup_host+0x4c/0x2c0 [lockd]
[<ffffffff816dc14b>] ? _raw_spin_unlock_bh+0x1b/0x20
[<ffffffffa0410be8>] ? svc_destroy+0xb8/0x140 [sunrpc]
[<ffffffffa045c323>] nlmclnt_init+0x53/0xc0 [lockd]
[<ffffffffa047d2dc>] ? nfs_get_client+0x1cc/0x340 [nfs]
[<ffffffffa047c2e7>] nfs_start_lockd+0xa7/0xd0 [nfs]
[<ffffffffa047df71>] nfs_create_server+0x181/0x5c0 [nfs]
[<ffffffffa04460f3>] nfs3_create_server+0x13/0x30 [nfsv3]
[<ffffffffa048a0bc>] nfs_try_mount+0x21c/0x300 [nfs]
[<ffffffff811ca32d>] ? __kmalloc_track_caller+0x1ad/0x240
[<ffffffffa048b677>] ? nfs_fs_mount+0xc37/0xd80 [nfs]
[<ffffffffa048ad05>] nfs_fs_mount+0x2c5/0xd80 [nfs]
[<ffffffffa048a830>] ? nfs_clone_super+0x140/0x140 [nfs]
[<ffffffffa048a240>] ? nfs_clone_sb_security+0x40/0x40 [nfs]
[<ffffffff811e7e43>] mount_fs+0x43/0x1b0
[<ffffffff81193100>] ? __alloc_percpu+0x10/0x20
[<ffffffff812026e6>] vfs_kern_mount+0x76/0x120
[<ffffffff81204917>] do_mount+0x237/0xa80
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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The flexfiles layout wants to create DS connection over NFSv3.
Add nfs3_set_ds_client to allow that to happen.
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Tom Haynes <Thomas.Haynes@primarydata.com>
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Silence a few warnings about missing symbols that are due to missing
includes of nfs3_fs.h.
Fixes: 00a36a1090350 (NFS: Move v3 declarations out of internal.h)
Fixes: cb8c20fa53ec2 (NFS: Move NFS v3 acl functions to nfs3_fs.h)
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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v2 and v4 don't use it, so I create two new nfs_rpc_ops functions to
initialize the ACL client only when we are using v3.
Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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