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0696c3a8ac
linux_dsm_epyc7002/net/core
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Peter Pan(潘卫平) 0696c3a8ac net:set valid name before calling ndo_init() 
In commit 1c5cae815d (net: call dev_alloc_name from register_netdevice),
a bug of bonding was involved, see example 1 and 2.

In register_netdevice(), the name of net_device is not valid until
dev_get_valid_name() is called. But dev->netdev_ops->ndo_init(that is
bond_init) is called before dev_get_valid_name(),
and it uses the invalid name of net_device.

I think register_netdevice() should make sure that the name of net_device is
valid before calling ndo_init().

example 1:
modprobe bonding
ls  /proc/net/bonding/bond%d

ps -eLf
root      3398     2  3398  0    1 21:34 ?        00:00:00 [bond%d]

example 2:
modprobe bonding max_bonds=3

[  170.100292] bonding: Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)
[  170.101090] bonding: Warning: either miimon or arp_interval and arp_ip_target module parameters must be specified, otherwise bonding will not detect link failures! see bonding.txt for details.
[  170.102469] ------------[ cut here ]------------
[  170.103150] WARNING: at /home/pwp/net-next-2.6/fs/proc/generic.c:586 proc_register+0x126/0x157()
[  170.104075] Hardware name: VirtualBox
[  170.105065] proc_dir_entry 'bonding/bond%d' already registered
[  170.105613] Modules linked in: bonding(+) sunrpc ipv6 uinput microcode ppdev parport_pc parport joydev e1000 pcspkr i2c_piix4 i2c_core [last unloaded: bonding]
[  170.108397] Pid: 3457, comm: modprobe Not tainted 2.6.39-rc2+ #14
[  170.108935] Call Trace:
[  170.109382]  [<c0438f3b>] warn_slowpath_common+0x6a/0x7f
[  170.109911]  [<c051a42a>] ? proc_register+0x126/0x157
[  170.110329]  [<c0438fc3>] warn_slowpath_fmt+0x2b/0x2f
[  170.110846]  [<c051a42a>] proc_register+0x126/0x157
[  170.111870]  [<c051a4dd>] proc_create_data+0x82/0x98
[  170.112335]  [<f94e6af6>] bond_create_proc_entry+0x3f/0x73 [bonding]
[  170.112905]  [<f94dd806>] bond_init+0x77/0xa5 [bonding]
[  170.113319]  [<c0721ac6>] register_netdevice+0x8c/0x1d3
[  170.113848]  [<f94e0e30>] bond_create+0x6c/0x90 [bonding]
[  170.114322]  [<f94f4763>] bonding_init+0x763/0x7b1 [bonding]
[  170.114879]  [<c0401240>] do_one_initcall+0x76/0x122
[  170.115317]  [<f94f4000>] ? 0xf94f3fff
[  170.115799]  [<c0463f1e>] sys_init_module+0x1286/0x140d
[  170.116879]  [<c07c6d9f>] sysenter_do_call+0x12/0x28
[  170.117404] ---[ end trace 64e4fac3ae5fff1a ]---
[  170.117924] bond%d: Warning: failed to register to debugfs
[  170.128728] ------------[ cut here ]------------
[  170.129360] WARNING: at /home/pwp/net-next-2.6/fs/proc/generic.c:586 proc_register+0x126/0x157()
[  170.130323] Hardware name: VirtualBox
[  170.130797] proc_dir_entry 'bonding/bond%d' already registered
[  170.131315] Modules linked in: bonding(+) sunrpc ipv6 uinput microcode ppdev parport_pc parport joydev e1000 pcspkr i2c_piix4 i2c_core [last unloaded: bonding]
[  170.133731] Pid: 3457, comm: modprobe Tainted: G        W   2.6.39-rc2+ #14
[  170.134308] Call Trace:
[  170.134743]  [<c0438f3b>] warn_slowpath_common+0x6a/0x7f
[  170.135305]  [<c051a42a>] ? proc_register+0x126/0x157
[  170.135820]  [<c0438fc3>] warn_slowpath_fmt+0x2b/0x2f
[  170.137168]  [<c051a42a>] proc_register+0x126/0x157
[  170.137700]  [<c051a4dd>] proc_create_data+0x82/0x98
[  170.138174]  [<f94e6af6>] bond_create_proc_entry+0x3f/0x73 [bonding]
[  170.138745]  [<f94dd806>] bond_init+0x77/0xa5 [bonding]
[  170.139278]  [<c0721ac6>] register_netdevice+0x8c/0x1d3
[  170.139828]  [<f94e0e30>] bond_create+0x6c/0x90 [bonding]
[  170.140361]  [<f94f4763>] bonding_init+0x763/0x7b1 [bonding]
[  170.140927]  [<c0401240>] do_one_initcall+0x76/0x122
[  170.141494]  [<f94f4000>] ? 0xf94f3fff
[  170.141975]  [<c0463f1e>] sys_init_module+0x1286/0x140d
[  170.142463]  [<c07c6d9f>] sysenter_do_call+0x12/0x28
[  170.142974] ---[ end trace 64e4fac3ae5fff1b ]---
[  170.144949] bond%d: Warning: failed to register to debugfs

Signed-off-by: Weiping Pan <panweiping3@gmail.com>
Reviewed-by: Jiri Pirko <jpirko@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-05-13 16:49:49 -04:00
..
datagram.c Fix a typo in datagram.c and sctp/socket.c. 2010-12-06 13:10:11 -08:00
dev_addr_lists.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2011-03-18 10:37:40 -07:00
dev.c net:set valid name before calling ndo_init() 2011-05-13 16:49:49 -04:00
drop_monitor.c net: fix incorrect spelling in drop monitor protocol 2011-03-21 18:20:26 -07:00
dst.c net: Use non-zero allocations in dst_alloc(). 2011-04-28 22:26:00 -07:00
ethtool.c ethtool: Added support for FW dump 2011-05-13 14:37:28 -04:00
fib_rules.c net: dont hold rtnl mutex during netlink dump callbacks 2011-05-02 15:26:28 -07:00
filter.c net: filter: Just In Time compiler for x86-64 2011-04-27 23:05:08 -07:00
flow.c net: Make flow cache paths use a const struct flowi. 2011-02-22 18:44:31 -08:00
gen_estimator.c pkt_sched: remov unnecessary bh_disable 2010-09-10 12:47:59 -07:00
gen_stats.c net/core: EXPORT_SYMBOL cleanups 2010-07-12 12:57:55 -07:00
iovec.c net: Limit socket I/O iovec total length to INT_MAX. 2010-10-28 11:47:52 -07:00
kmap_skb.h [PATCH] severing skbuff.h -> highmem.h 2006-12-04 02:00:29 -05:00
link_watch.c Fix common misspellings 2011-03-31 11:26:23 -03:00
Makefile net: support time stamping in phy devices. 2010-07-18 19:15:26 -07:00
neighbour.c neigh: __rcu annotations 2011-01-20 16:59:34 -08:00
net_namespace.c net: minor cleanup to net_namespace.c. 2011-04-15 15:47:51 -07:00
net-sysfs.c ethtool: Call ethtool's get/set_settings callbacks with cleaned data 2011-04-29 14:01:30 -07:00
net-sysfs.h xps: Add CONFIG_XPS 2010-11-28 18:24:14 -08:00
net-traces.c netdev: Add tracepoints to netdev layer 2010-09-07 17:51:33 +02:00
netevent.c net/core: EXPORT_SYMBOL cleanups 2010-07-12 12:57:55 -07:00
netpoll.c net: add mac_pton() for parsing MAC address 2011-05-09 12:10:49 -07:00
pktgen.c net: add mac_pton() for parsing MAC address 2011-05-09 12:10:49 -07:00
request_sock.c Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-12-08 13:47:38 -08:00
rtnetlink.c net: use batched device unregister in veth and macvlan 2011-05-09 11:41:40 -07:00
scm.c Allow passing O_PATH descriptors via SCM_RIGHTS datagrams 2011-03-15 02:21:45 -04:00
skbuff.c Fix common misspellings 2011-03-31 11:26:23 -03:00
sock.c Fix common misspellings 2011-03-31 11:26:23 -03:00
stream.c net: Fix the condition passed to sk_wait_event() 2010-10-03 20:41:32 -07:00
sysctl_net_core.c net: filter: Just In Time compiler for x86-64 2011-04-27 23:05:08 -07:00
timestamping.c Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-12-17 12:27:22 -08:00
user_dma.c net/core/user_dma.c: Use frag list abstraction interfaces. 2009-06-09 00:19:10 -07:00
utils.c net: add mac_pton() for parsing MAC address 2011-05-09 12:10:49 -07:00