mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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![Linus Torvalds](/assets/img/avatar_default.png)
Pull networking updates from David Miller: "Highlights: 1) Support AES128-CCM ciphers in kTLS, from Vakul Garg. 2) Add fib_sync_mem to control the amount of dirty memory we allow to queue up between synchronize RCU calls, from David Ahern. 3) Make flow classifier more lockless, from Vlad Buslov. 4) Add PHY downshift support to aquantia driver, from Heiner Kallweit. 5) Add SKB cache for TCP rx and tx, from Eric Dumazet. This reduces contention on SLAB spinlocks in heavy RPC workloads. 6) Partial GSO offload support in XFRM, from Boris Pismenny. 7) Add fast link down support to ethtool, from Heiner Kallweit. 8) Use siphash for IP ID generator, from Eric Dumazet. 9) Pull nexthops even further out from ipv4/ipv6 routes and FIB entries, from David Ahern. 10) Move skb->xmit_more into a per-cpu variable, from Florian Westphal. 11) Improve eBPF verifier speed and increase maximum program size, from Alexei Starovoitov. 12) Eliminate per-bucket spinlocks in rhashtable, and instead use bit spinlocks. From Neil Brown. 13) Allow tunneling with GUE encap in ipvs, from Jacky Hu. 14) Improve link partner cap detection in generic PHY code, from Heiner Kallweit. 15) Add layer 2 encap support to bpf_skb_adjust_room(), from Alan Maguire. 16) Remove SKB list implementation assumptions in SCTP, your's truly. 17) Various cleanups, optimizations, and simplifications in r8169 driver. From Heiner Kallweit. 18) Add memory accounting on TX and RX path of SCTP, from Xin Long. 19) Switch PHY drivers over to use dynamic featue detection, from Heiner Kallweit. 20) Support flow steering without masking in dpaa2-eth, from Ioana Ciocoi. 21) Implement ndo_get_devlink_port in netdevsim driver, from Jiri Pirko. 22) Increase the strict parsing of current and future netlink attributes, also export such policies to userspace. From Johannes Berg. 23) Allow DSA tag drivers to be modular, from Andrew Lunn. 24) Remove legacy DSA probing support, also from Andrew Lunn. 25) Allow ll_temac driver to be used on non-x86 platforms, from Esben Haabendal. 26) Add a generic tracepoint for TX queue timeouts to ease debugging, from Cong Wang. 27) More indirect call optimizations, from Paolo Abeni" * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1763 commits) cxgb4: Fix error path in cxgb4_init_module net: phy: improve pause mode reporting in phy_print_status dt-bindings: net: Fix a typo in the phy-mode list for ethernet bindings net: macb: Change interrupt and napi enable order in open net: ll_temac: Improve error message on error IRQ net/sched: remove block pointer from common offload structure net: ethernet: support of_get_mac_address new ERR_PTR error net: usb: smsc: fix warning reported by kbuild test robot staging: octeon-ethernet: Fix of_get_mac_address ERR_PTR check net: dsa: support of_get_mac_address new ERR_PTR error net: dsa: sja1105: Fix status initialization in sja1105_get_ethtool_stats vrf: sit mtu should not be updated when vrf netdev is the link net: dsa: Fix error cleanup path in dsa_init_module l2tp: Fix possible NULL pointer dereference taprio: add null check on sched_nest to avoid potential null pointer dereference net: mvpp2: cls: fix less than zero check on a u32 variable net_sched: sch_fq: handle non connected flows net_sched: sch_fq: do not assume EDT packets are ordered net: hns3: use devm_kcalloc when allocating desc_cb net: hns3: some cleanup for struct hns3_enet_ring ...
255 lines
5.4 KiB
C
255 lines
5.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (C) 2010-2019 B.A.T.M.A.N. contributors:
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*
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* Marek Lindner
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*/
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#include "log.h"
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#include "main.h"
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#include <linux/compiler.h>
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#include <linux/debugfs.h>
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#include <linux/errno.h>
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#include <linux/eventpoll.h>
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#include <linux/export.h>
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#include <linux/fcntl.h>
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#include <linux/fs.h>
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#include <linux/gfp.h>
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#include <linux/jiffies.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/poll.h>
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#include <linux/sched.h> /* for linux/wait.h */
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <linux/stddef.h>
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#include <linux/types.h>
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#include <linux/uaccess.h>
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#include <linux/wait.h>
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#include <stdarg.h>
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#include "debugfs.h"
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#include "trace.h"
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#ifdef CONFIG_BATMAN_ADV_DEBUGFS
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#define BATADV_LOG_BUFF_MASK (batadv_log_buff_len - 1)
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static const int batadv_log_buff_len = BATADV_LOG_BUF_LEN;
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static char *batadv_log_char_addr(struct batadv_priv_debug_log *debug_log,
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size_t idx)
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{
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return &debug_log->log_buff[idx & BATADV_LOG_BUFF_MASK];
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}
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static void batadv_emit_log_char(struct batadv_priv_debug_log *debug_log,
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char c)
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{
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char *char_addr;
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char_addr = batadv_log_char_addr(debug_log, debug_log->log_end);
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*char_addr = c;
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debug_log->log_end++;
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if (debug_log->log_end - debug_log->log_start > batadv_log_buff_len)
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debug_log->log_start = debug_log->log_end - batadv_log_buff_len;
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}
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__printf(2, 3)
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static int batadv_fdebug_log(struct batadv_priv_debug_log *debug_log,
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const char *fmt, ...)
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{
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va_list args;
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static char debug_log_buf[256];
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char *p;
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if (!debug_log)
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return 0;
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spin_lock_bh(&debug_log->lock);
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va_start(args, fmt);
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vscnprintf(debug_log_buf, sizeof(debug_log_buf), fmt, args);
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va_end(args);
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for (p = debug_log_buf; *p != 0; p++)
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batadv_emit_log_char(debug_log, *p);
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spin_unlock_bh(&debug_log->lock);
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wake_up(&debug_log->queue_wait);
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return 0;
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}
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static int batadv_log_open(struct inode *inode, struct file *file)
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{
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if (!try_module_get(THIS_MODULE))
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return -EBUSY;
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batadv_debugfs_deprecated(file,
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"Use tracepoint batadv:batadv_dbg instead\n");
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stream_open(inode, file);
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file->private_data = inode->i_private;
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return 0;
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}
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static int batadv_log_release(struct inode *inode, struct file *file)
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{
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module_put(THIS_MODULE);
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return 0;
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}
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static bool batadv_log_empty(struct batadv_priv_debug_log *debug_log)
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{
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return !(debug_log->log_start - debug_log->log_end);
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}
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static ssize_t batadv_log_read(struct file *file, char __user *buf,
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size_t count, loff_t *ppos)
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{
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struct batadv_priv *bat_priv = file->private_data;
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struct batadv_priv_debug_log *debug_log = bat_priv->debug_log;
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int error, i = 0;
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char *char_addr;
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char c;
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if ((file->f_flags & O_NONBLOCK) && batadv_log_empty(debug_log))
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return -EAGAIN;
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if (!buf)
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return -EINVAL;
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if (count == 0)
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return 0;
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if (!access_ok(buf, count))
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return -EFAULT;
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error = wait_event_interruptible(debug_log->queue_wait,
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(!batadv_log_empty(debug_log)));
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if (error)
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return error;
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spin_lock_bh(&debug_log->lock);
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while ((!error) && (i < count) &&
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(debug_log->log_start != debug_log->log_end)) {
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char_addr = batadv_log_char_addr(debug_log,
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debug_log->log_start);
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c = *char_addr;
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debug_log->log_start++;
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spin_unlock_bh(&debug_log->lock);
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error = __put_user(c, buf);
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spin_lock_bh(&debug_log->lock);
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buf++;
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i++;
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}
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spin_unlock_bh(&debug_log->lock);
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if (!error)
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return i;
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return error;
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}
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static __poll_t batadv_log_poll(struct file *file, poll_table *wait)
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{
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struct batadv_priv *bat_priv = file->private_data;
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struct batadv_priv_debug_log *debug_log = bat_priv->debug_log;
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poll_wait(file, &debug_log->queue_wait, wait);
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if (!batadv_log_empty(debug_log))
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return EPOLLIN | EPOLLRDNORM;
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return 0;
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}
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static const struct file_operations batadv_log_fops = {
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.open = batadv_log_open,
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.release = batadv_log_release,
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.read = batadv_log_read,
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.poll = batadv_log_poll,
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.llseek = no_llseek,
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};
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/**
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* batadv_debug_log_setup() - Initialize debug log
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* @bat_priv: the bat priv with all the soft interface information
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*
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* Return: 0 on success or negative error number in case of failure
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*/
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int batadv_debug_log_setup(struct batadv_priv *bat_priv)
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{
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struct dentry *d;
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if (!bat_priv->debug_dir)
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goto err;
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bat_priv->debug_log = kzalloc(sizeof(*bat_priv->debug_log), GFP_ATOMIC);
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if (!bat_priv->debug_log)
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goto err;
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spin_lock_init(&bat_priv->debug_log->lock);
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init_waitqueue_head(&bat_priv->debug_log->queue_wait);
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d = debugfs_create_file("log", 0400, bat_priv->debug_dir, bat_priv,
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&batadv_log_fops);
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if (!d)
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goto err;
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return 0;
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err:
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return -ENOMEM;
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}
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/**
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* batadv_debug_log_cleanup() - Destroy debug log
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* @bat_priv: the bat priv with all the soft interface information
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*/
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void batadv_debug_log_cleanup(struct batadv_priv *bat_priv)
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{
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kfree(bat_priv->debug_log);
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bat_priv->debug_log = NULL;
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}
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#endif /* CONFIG_BATMAN_ADV_DEBUGFS */
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/**
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* batadv_debug_log() - Add debug log entry
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* @bat_priv: the bat priv with all the soft interface information
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* @fmt: format string
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*
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* Return: 0 on success or negative error number in case of failure
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*/
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int batadv_debug_log(struct batadv_priv *bat_priv, const char *fmt, ...)
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{
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struct va_format vaf;
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va_list args;
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va_start(args, fmt);
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vaf.fmt = fmt;
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vaf.va = &args;
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#ifdef CONFIG_BATMAN_ADV_DEBUGFS
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batadv_fdebug_log(bat_priv->debug_log, "[%10u] %pV",
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jiffies_to_msecs(jiffies), &vaf);
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#endif
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trace_batadv_dbg(bat_priv, &vaf);
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va_end(args);
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return 0;
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}
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