# # gdb helper commands and functions for Linux kernel debugging # # list tools # # Copyright (c) Thiebaud Weksteen, 2015 # # Authors: # Thiebaud Weksteen # # This work is licensed under the terms of the GNU GPL version 2. # import gdb from linux import utils list_head = utils.CachedType("struct list_head") hlist_head = utils.CachedType("struct hlist_head") hlist_node = utils.CachedType("struct hlist_node") def list_for_each(head): if head.type == list_head.get_type().pointer(): head = head.dereference() elif head.type != list_head.get_type(): raise TypeError("Must be struct list_head not {}" .format(head.type)) if head['next'] == 0: gdb.write("list_for_each: Uninitialized list '{}' treated as empty\n" .format(head.address)) return node = head['next'].dereference() while node.address != head.address: yield node.address node = node['next'].dereference() def list_for_each_entry(head, gdbtype, member): for node in list_for_each(head): yield utils.container_of(node, gdbtype, member) def hlist_for_each(head): if head.type == hlist_head.get_type().pointer(): head = head.dereference() elif head.type != hlist_head.get_type(): raise TypeError("Must be struct hlist_head not {}" .format(head.type)) node = head['first'].dereference() while node.address: yield node.address node = node['next'].dereference() def hlist_for_each_entry(head, gdbtype, member): for node in hlist_for_each(head): yield utils.container_of(node, gdbtype, member) def list_check(head): nb = 0 if (head.type == list_head.get_type().pointer()): head = head.dereference() elif (head.type != list_head.get_type()): raise gdb.GdbError('argument must be of type (struct list_head [*])') c = head try: gdb.write("Starting with: {}\n".format(c)) except gdb.MemoryError: gdb.write('head is not accessible\n') return while True: p = c['prev'].dereference() n = c['next'].dereference() try: if p['next'] != c.address: gdb.write('prev.next != current: ' 'current@{current_addr}={current} ' 'prev@{p_addr}={p}\n'.format( current_addr=c.address, current=c, p_addr=p.address, p=p, )) return except gdb.MemoryError: gdb.write('prev is not accessible: ' 'current@{current_addr}={current}\n'.format( current_addr=c.address, current=c )) return try: if n['prev'] != c.address: gdb.write('next.prev != current: ' 'current@{current_addr}={current} ' 'next@{n_addr}={n}\n'.format( current_addr=c.address, current=c, n_addr=n.address, n=n, )) return except gdb.MemoryError: gdb.write('next is not accessible: ' 'current@{current_addr}={current}\n'.format( current_addr=c.address, current=c )) return c = n nb += 1 if c == head: gdb.write("list is consistent: {} node(s)\n".format(nb)) return class LxListChk(gdb.Command): """Verify a list consistency""" def __init__(self): super(LxListChk, self).__init__("lx-list-check", gdb.COMMAND_DATA, gdb.COMPLETE_EXPRESSION) def invoke(self, arg, from_tty): argv = gdb.string_to_argv(arg) if len(argv) != 1: raise gdb.GdbError("lx-list-check takes one argument") list_check(gdb.parse_and_eval(argv[0])) LxListChk() s='ctrl'>
authorJulian Wiedmann <jwi@linux.ibm.com>2020-02-17 13:27:58 +0100
committerDavid S. Miller <davem@davemloft.net>2020-02-17 14:30:54 -0800
commitbd706ff8ea2b6e2d3f21f0863b2fc42f860f8ba2 (patch)
treeea4e9fd226dcaec59d14d0b17b6998982bdb69c3 /drivers/net/ethernet/intel
parent3e07df430c2b4ffe003085a0b3e6b0b041187632 (diff)
net: vlan: suppress "failed to kill vid" warnings
When a real dev unregisters, vlan_device_event() also unregisters all of its vlan interfaces. For each VID this ends up in __vlan_vid_del(), which attempts to remove the VID from the real dev's VLAN filter. But the unregistering real dev might no longer be able to issue the required IOs, and return an error. Subsequently we raise a noisy warning msg that is not appropriate for this situation: the real dev is being torn down anyway, there shouldn't be any worry about cleanly releasing all of its HW-internal resources. So to avoid scaring innocent users, suppress this warning when the failed deletion happens on an unregistering device. While at it also convert the raw pr_warn() to a more fitting netdev_warn(). Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/intel')