2019-05-29 00:57:20 +08:00
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// SPDX-License-Identifier: GPL-2.0-only
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2007-05-18 21:59:31 +08:00
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/*
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* Copyright (C) 2007 Red Hat, Inc. All rights reserved.
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*/
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#include <net/genetlink.h>
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#include <linux/dlm.h>
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#include <linux/dlm_netlink.h>
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include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files. percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.
percpu.h -> slab.h dependency is about to be removed. Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability. As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.
http://userweb.kernel.org/~tj/misc/slabh-sweep.py
The script does the followings.
* Scan files for gfp and slab usages and update includes such that
only the necessary includes are there. ie. if only gfp is used,
gfp.h, if slab is used, slab.h.
* When the script inserts a new include, it looks at the include
blocks and try to put the new include such that its order conforms
to its surrounding. It's put in the include block which contains
core kernel includes, in the same order that the rest are ordered -
alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
doesn't seem to be any matching order.
* If the script can't find a place to put a new include (mostly
because the file doesn't have fitting include block), it prints out
an error message indicating which .h file needs to be added to the
file.
The conversion was done in the following steps.
1. The initial automatic conversion of all .c files updated slightly
over 4000 files, deleting around 700 includes and adding ~480 gfp.h
and ~3000 slab.h inclusions. The script emitted errors for ~400
files.
2. Each error was manually checked. Some didn't need the inclusion,
some needed manual addition while adding it to implementation .h or
embedding .c file was more appropriate for others. This step added
inclusions to around 150 files.
3. The script was run again and the output was compared to the edits
from #2 to make sure no file was left behind.
4. Several build tests were done and a couple of problems were fixed.
e.g. lib/decompress_*.c used malloc/free() wrappers around slab
APIs requiring slab.h to be added manually.
5. The script was run on all .h files but without automatically
editing them as sprinkling gfp.h and slab.h inclusions around .h
files could easily lead to inclusion dependency hell. Most gfp.h
inclusion directives were ignored as stuff from gfp.h was usually
wildly available and often used in preprocessor macros. Each
slab.h inclusion directive was examined and added manually as
necessary.
6. percpu.h was updated not to include slab.h.
7. Build test were done on the following configurations and failures
were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
distributed build env didn't work with gcov compiles) and a few
more options had to be turned off depending on archs to make things
build (like ipr on powerpc/64 which failed due to missing writeq).
* x86 and x86_64 UP and SMP allmodconfig and a custom test config.
* powerpc and powerpc64 SMP allmodconfig
* sparc and sparc64 SMP allmodconfig
* ia64 SMP allmodconfig
* s390 SMP allmodconfig
* alpha SMP allmodconfig
* um on x86_64 SMP allmodconfig
8. percpu.h modifications were reverted so that it could be applied as
a separate patch and serve as bisection point.
Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.
Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 16:04:11 +08:00
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#include <linux/gfp.h>
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2007-05-18 21:59:31 +08:00
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#include "dlm_internal.h"
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static uint32_t dlm_nl_seqnum;
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2012-09-08 04:12:54 +08:00
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static uint32_t listener_nlportid;
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2007-05-18 21:59:31 +08:00
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2016-10-24 20:40:03 +08:00
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static struct genl_family family;
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2007-05-18 21:59:31 +08:00
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static int prepare_data(u8 cmd, struct sk_buff **skbp, size_t size)
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{
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struct sk_buff *skb;
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void *data;
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2009-12-01 06:34:43 +08:00
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skb = genlmsg_new(size, GFP_NOFS);
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2007-05-18 21:59:31 +08:00
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if (!skb)
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return -ENOMEM;
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/* add the message headers */
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data = genlmsg_put(skb, 0, dlm_nl_seqnum++, &family, 0, cmd);
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if (!data) {
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nlmsg_free(skb);
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return -EINVAL;
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}
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*skbp = skb;
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return 0;
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}
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static struct dlm_lock_data *mk_data(struct sk_buff *skb)
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{
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struct nlattr *ret;
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ret = nla_reserve(skb, DLM_TYPE_LOCK, sizeof(struct dlm_lock_data));
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if (!ret)
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return NULL;
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return nla_data(ret);
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}
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static int send_data(struct sk_buff *skb)
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{
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struct genlmsghdr *genlhdr = nlmsg_data((struct nlmsghdr *)skb->data);
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void *data = genlmsg_data(genlhdr);
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2015-01-17 05:09:00 +08:00
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genlmsg_end(skb, data);
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2007-05-18 21:59:31 +08:00
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2012-09-08 04:12:54 +08:00
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return genlmsg_unicast(&init_net, skb, listener_nlportid);
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2007-05-18 21:59:31 +08:00
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}
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static int user_cmd(struct sk_buff *skb, struct genl_info *info)
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{
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2012-09-08 04:12:54 +08:00
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listener_nlportid = info->snd_portid;
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printk("user_cmd nlpid %u\n", listener_nlportid);
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2007-05-18 21:59:31 +08:00
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return 0;
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}
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2020-10-03 05:49:54 +08:00
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static const struct genl_small_ops dlm_nl_ops[] = {
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2013-11-19 22:19:31 +08:00
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{
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.cmd = DLM_CMD_HELLO,
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2019-04-26 20:07:31 +08:00
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.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
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2013-11-19 22:19:31 +08:00
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.doit = user_cmd,
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},
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2007-05-18 21:59:31 +08:00
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};
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2016-10-24 20:40:05 +08:00
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static struct genl_family family __ro_after_init = {
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2016-10-24 20:40:03 +08:00
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.name = DLM_GENL_NAME,
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.version = DLM_GENL_VERSION,
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2020-10-03 05:49:54 +08:00
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.small_ops = dlm_nl_ops,
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.n_small_ops = ARRAY_SIZE(dlm_nl_ops),
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2022-08-25 08:18:30 +08:00
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.resv_start_op = DLM_CMD_HELLO + 1,
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2016-10-24 20:40:03 +08:00
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.module = THIS_MODULE,
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};
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2008-02-02 01:53:46 +08:00
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int __init dlm_netlink_init(void)
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2007-05-18 21:59:31 +08:00
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{
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2016-10-24 20:40:03 +08:00
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return genl_register_family(&family);
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2007-05-18 21:59:31 +08:00
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}
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2008-05-12 01:15:34 +08:00
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void dlm_netlink_exit(void)
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2007-05-18 21:59:31 +08:00
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{
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genl_unregister_family(&family);
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}
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static void fill_data(struct dlm_lock_data *data, struct dlm_lkb *lkb)
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{
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struct dlm_rsb *r = lkb->lkb_resource;
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memset(data, 0, sizeof(struct dlm_lock_data));
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data->version = DLM_LOCK_DATA_VERSION;
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data->nodeid = lkb->lkb_nodeid;
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data->ownpid = lkb->lkb_ownpid;
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data->id = lkb->lkb_id;
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data->remid = lkb->lkb_remid;
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data->status = lkb->lkb_status;
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data->grmode = lkb->lkb_grmode;
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data->rqmode = lkb->lkb_rqmode;
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2008-02-07 13:27:04 +08:00
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if (lkb->lkb_ua)
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data->xid = lkb->lkb_ua->xid;
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2007-05-18 21:59:31 +08:00
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if (r) {
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data->lockspace_id = r->res_ls->ls_global_id;
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data->resource_namelen = r->res_length;
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memcpy(data->resource_name, r->res_name, r->res_length);
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}
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}
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void dlm_timeout_warn(struct dlm_lkb *lkb)
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{
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treewide: Remove uninitialized_var() usage
Using uninitialized_var() is dangerous as it papers over real bugs[1]
(or can in the future), and suppresses unrelated compiler warnings
(e.g. "unused variable"). If the compiler thinks it is uninitialized,
either simply initialize the variable or make compiler changes.
In preparation for removing[2] the[3] macro[4], remove all remaining
needless uses with the following script:
git grep '\buninitialized_var\b' | cut -d: -f1 | sort -u | \
xargs perl -pi -e \
's/\buninitialized_var\(([^\)]+)\)/\1/g;
s:\s*/\* (GCC be quiet|to make compiler happy) \*/$::g;'
drivers/video/fbdev/riva/riva_hw.c was manually tweaked to avoid
pathological white-space.
No outstanding warnings were found building allmodconfig with GCC 9.3.0
for x86_64, i386, arm64, arm, powerpc, powerpc64le, s390x, mips, sparc64,
alpha, and m68k.
[1] https://lore.kernel.org/lkml/20200603174714.192027-1-glider@google.com/
[2] https://lore.kernel.org/lkml/CA+55aFw+Vbj0i=1TGqCR5vQkCzWJ0QxK6CernOU6eedsudAixw@mail.gmail.com/
[3] https://lore.kernel.org/lkml/CA+55aFwgbgqhbp1fkxvRKEpzyR5J8n1vKT1VZdz9knmPuXhOeg@mail.gmail.com/
[4] https://lore.kernel.org/lkml/CA+55aFz2500WfbKXAx8s67wrm9=yVJu65TpLgN_ybYNv0VEOKA@mail.gmail.com/
Reviewed-by: Leon Romanovsky <leonro@mellanox.com> # drivers/infiniband and mlx4/mlx5
Acked-by: Jason Gunthorpe <jgg@mellanox.com> # IB
Acked-by: Kalle Valo <kvalo@codeaurora.org> # wireless drivers
Reviewed-by: Chao Yu <yuchao0@huawei.com> # erofs
Signed-off-by: Kees Cook <keescook@chromium.org>
2020-06-04 04:09:38 +08:00
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struct sk_buff *send_skb;
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2007-05-18 21:59:31 +08:00
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struct dlm_lock_data *data;
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size_t size;
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int rv;
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size = nla_total_size(sizeof(struct dlm_lock_data)) +
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nla_total_size(0); /* why this? */
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rv = prepare_data(DLM_CMD_TIMEOUT, &send_skb, size);
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if (rv < 0)
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return;
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data = mk_data(send_skb);
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if (!data) {
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nlmsg_free(send_skb);
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return;
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}
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fill_data(data, lkb);
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send_data(send_skb);
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}
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