From 4352b8aee98005853aa63f57d6377282de17a33f Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sun, 23 Aug 2026 13:28:57 -0700 Subject: Merge tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux Pull I3C updates from Alexandre Belloni: "A new driver this cycle, for the AMD AXI I3C controller. There are also new features such as IBI wakeup support, SETAASA device discovery and ACPI support for the the DAA methods, meaning we can now communicate with the SPD devices on DDR5 modules. New driver: - AMD AXI I3C master controller Subsystem: - I3C Common Command Code (CCC) handling improvements, especially around GET CCCs - SETAASA device discovery support - ACPI support for all existing DAA methods like SETDASA, SETNEWDA as well as I2C devices on I3C bus - IBI-based wakeup support Drivers: - dw: SETAASA support - mipi-i3c-hci: advertise IBI wakeup capability, AMD_PT I3C controller support, PIO queue management support for HCI v1.2 - renesas: improve suspend to RAM support, add runtime PM support" * tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux: (70 commits) i3c: dw: reduce do_daa time if there's no client i3c: mipi-i3c-hci: Add support for AMD_PT I3C controller i3c: mipi-i3c-hci: Add PIO queue management support for HCI v1.2 i3c: mipi-i3c-hci: Fix missing STAT_IBI_STATUS_THLD in PIO mode i3c: dw: rename "pclk" to "apb" to match dt-binding i3c: dw: make struct dw_i3c_cmd smaller i3c: dw: use COMMAND_PORT_TRANSFER_ARG instead of hardcoding i3c: renesas: Don't register devices when ENTDAA times out i3c: master: dw-i3c-master: fix OD timing for first broadcast i3c: mipi-i3c-hci: Advertise IBI wakeup capability i3c: mipi-i3c-hci: Factor out i3c_hci_sysdev() i3c: mipi-i3c-hci-pci: Propagate I3C wakeup requirements to PCI i3c: master: Reject IBI requests from non-IBI-capable devices i3c: master: Add helper to query bus wakeup requirements i3c: master: Report wakeup events for IBIs i3c: master: Support IBI-based wakeup capability i3c: master: Fix potential UAF in i3c_device_match() i3c: master: Fix potential UAF in i3c_device_uevent() i3c: Make dev->desc locking assumptions explicit i3c: master: Fix use-after-free of master->this ... --- net/kcm/kcmproc.c | 387 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 387 insertions(+) create mode 100644 net/kcm/kcmproc.c (limited to 'net/kcm/kcmproc.c') diff --git a/net/kcm/kcmproc.c b/net/kcm/kcmproc.c new file mode 100644 index 000000000..25c1007f1 --- /dev/null +++ b/net/kcm/kcmproc.c @@ -0,0 +1,387 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#ifdef CONFIG_PROC_FS +static struct kcm_mux *kcm_get_first(struct seq_file *seq) +{ + struct net *net = seq_file_net(seq); + struct kcm_net *knet = net_generic(net, kcm_net_id); + + return list_first_or_null_rcu(&knet->mux_list, + struct kcm_mux, kcm_mux_list); +} + +static struct kcm_mux *kcm_get_next(struct kcm_mux *mux) +{ + struct kcm_net *knet = mux->knet; + + return list_next_or_null_rcu(&knet->mux_list, &mux->kcm_mux_list, + struct kcm_mux, kcm_mux_list); +} + +static struct kcm_mux *kcm_get_idx(struct seq_file *seq, loff_t pos) +{ + struct net *net = seq_file_net(seq); + struct kcm_net *knet = net_generic(net, kcm_net_id); + struct kcm_mux *m; + + list_for_each_entry_rcu(m, &knet->mux_list, kcm_mux_list) { + if (!pos) + return m; + --pos; + } + return NULL; +} + +static void *kcm_seq_next(struct seq_file *seq, void *v, loff_t *pos) +{ + void *p; + + if (v == SEQ_START_TOKEN) + p = kcm_get_first(seq); + else + p = kcm_get_next(v); + ++*pos; + return p; +} + +static void *kcm_seq_start(struct seq_file *seq, loff_t *pos) + __acquires(rcu) +{ + rcu_read_lock(); + + if (!*pos) + return SEQ_START_TOKEN; + else + return kcm_get_idx(seq, *pos - 1); +} + +static void kcm_seq_stop(struct seq_file *seq, void *v) + __releases(rcu) +{ + rcu_read_unlock(); +} + +struct kcm_proc_mux_state { + struct seq_net_private p; + int idx; +}; + +static void kcm_format_mux_header(struct seq_file *seq) +{ + struct net *net = seq_file_net(seq); + struct kcm_net *knet = net_generic(net, kcm_net_id); + + seq_printf(seq, + "*** KCM statistics (%d MUX) ****\n", + knet->count); + + seq_printf(seq, + "%-14s %-10s %-16s %-10s %-16s %-8s %-8s %-8s %-8s %s", + "Object", + "RX-Msgs", + "RX-Bytes", + "TX-Msgs", + "TX-Bytes", + "Recv-Q", + "Rmem", + "Send-Q", + "Smem", + "Status"); + + /* XXX: pdsts header stuff here */ + seq_puts(seq, "\n"); +} + +static void kcm_format_sock(struct kcm_sock *kcm, struct seq_file *seq, + int i, int *len) +{ + seq_printf(seq, + " kcm-%-7u %-10llu %-16llu %-10llu %-16llu %-8d %-8d %-8d %-8s ", + kcm->index, + kcm->stats.rx_msgs, + kcm->stats.rx_bytes, + kcm->stats.tx_msgs, + kcm->stats.tx_bytes, + kcm->sk.sk_receive_queue.qlen, + sk_rmem_alloc_get(&kcm->sk), + kcm->sk.sk_write_queue.qlen, + "-"); + + if (kcm->tx_psock) + seq_printf(seq, "Psck-%u ", kcm->tx_psock->index); + + if (kcm->tx_wait) + seq_puts(seq, "TxWait "); + + if (kcm->tx_wait_more) + seq_puts(seq, "WMore "); + + if (kcm->rx_wait) + seq_puts(seq, "RxWait "); + + seq_puts(seq, "\n"); +} + +static void kcm_format_psock(struct kcm_psock *psock, struct seq_file *seq, + int i, int *len) +{ + seq_printf(seq, + " psock-%-5u %-10llu %-16llu %-10llu %-16llu %-8d %-8d %-8d %-8d ", + psock->index, + psock->strp.stats.msgs, + psock->strp.stats.bytes, + psock->stats.tx_msgs, + psock->stats.tx_bytes, + psock->sk->sk_receive_queue.qlen, + atomic_read(&psock->sk->sk_rmem_alloc), + psock->sk->sk_write_queue.qlen, + refcount_read(&psock->sk->sk_wmem_alloc)); + + if (psock->done) + seq_puts(seq, "Done "); + + if (psock->tx_stopped) + seq_puts(seq, "TxStop "); + + if (psock->strp.stopped) + seq_puts(seq, "RxStop "); + + if (psock->tx_kcm) + seq_printf(seq, "Rsvd-%d ", psock->tx_kcm->index); + + if (!psock->strp.paused && !psock->ready_rx_msg) { + if (psock->sk->sk_receive_queue.qlen) { + if (psock->strp.need_bytes) + seq_printf(seq, "RxWait=%u ", + psock->strp.need_bytes); + else + seq_printf(seq, "RxWait "); + } + } else { + if (psock->strp.paused) + seq_puts(seq, "RxPause "); + + if (psock->ready_rx_msg) + seq_puts(seq, "RdyRx "); + } + + seq_puts(seq, "\n"); +} + +static void +kcm_format_mux(struct kcm_mux *mux, loff_t idx, struct seq_file *seq) +{ + int i, len; + struct kcm_sock *kcm; + struct kcm_psock *psock; + + /* mux information */ + seq_printf(seq, + "%-6s%-8s %-10llu %-16llu %-10llu %-16llu %-8s %-8s %-8s %-8s ", + "mux", "", + mux->stats.rx_msgs, + mux->stats.rx_bytes, + mux->stats.tx_msgs, + mux->stats.tx_bytes, + "-", "-", "-", "-"); + + seq_printf(seq, "KCMs: %d, Psocks %d\n", + mux->kcm_socks_cnt, mux->psocks_cnt); + + /* kcm sock information */ + i = 0; + spin_lock_bh(&mux->lock); + list_for_each_entry(kcm, &mux->kcm_socks, kcm_sock_list) { + kcm_format_sock(kcm, seq, i, &len); + i++; + } + i = 0; + list_for_each_entry(psock, &mux->psocks, psock_list) { + kcm_format_psock(psock, seq, i, &len); + i++; + } + spin_unlock_bh(&mux->lock); +} + +static int kcm_seq_show(struct seq_file *seq, void *v) +{ + struct kcm_proc_mux_state *mux_state; + + mux_state = seq->private; + if (v == SEQ_START_TOKEN) { + mux_state->idx = 0; + kcm_format_mux_header(seq); + } else { + kcm_format_mux(v, mux_state->idx, seq); + mux_state->idx++; + } + return 0; +} + +static const struct seq_operations kcm_seq_ops = { + .show = kcm_seq_show, + .start = kcm_seq_start, + .next = kcm_seq_next, + .stop = kcm_seq_stop, +}; + +static int kcm_stats_seq_show(struct seq_file *seq, void *v) +{ + struct kcm_psock_stats psock_stats; + struct kcm_mux_stats mux_stats; + struct strp_aggr_stats strp_stats; + struct kcm_mux *mux; + struct kcm_psock *psock; + struct net *net = seq->private; + struct kcm_net *knet = net_generic(net, kcm_net_id); + + memset(&mux_stats, 0, sizeof(mux_stats)); + memset(&psock_stats, 0, sizeof(psock_stats)); + memset(&strp_stats, 0, sizeof(strp_stats)); + + mutex_lock(&knet->mutex); + + aggregate_mux_stats(&knet->aggregate_mux_stats, &mux_stats); + aggregate_psock_stats(&knet->aggregate_psock_stats, + &psock_stats); + aggregate_strp_stats(&knet->aggregate_strp_stats, + &strp_stats); + + list_for_each_entry(mux, &knet->mux_list, kcm_mux_list) { + spin_lock_bh(&mux->lock); + aggregate_mux_stats(&mux->stats, &mux_stats); + aggregate_psock_stats(&mux->aggregate_psock_stats, + &psock_stats); + aggregate_strp_stats(&mux->aggregate_strp_stats, + &strp_stats); + list_for_each_entry(psock, &mux->psocks, psock_list) { + aggregate_psock_stats(&psock->stats, &psock_stats); + save_strp_stats(&psock->strp, &strp_stats); + } + + spin_unlock_bh(&mux->lock); + } + + mutex_unlock(&knet->mutex); + + seq_printf(seq, + "%-8s %-10s %-16s %-10s %-16s %-10s %-10s %-10s %-10s %-10s\n", + "MUX", + "RX-Msgs", + "RX-Bytes", + "TX-Msgs", + "TX-Bytes", + "TX-Retries", + "Attach", + "Unattach", + "UnattchRsvd", + "RX-RdyDrops"); + + seq_printf(seq, + "%-8s %-10llu %-16llu %-10llu %-16llu %-10u %-10u %-10u %-10u %-10u\n", + "", + mux_stats.rx_msgs, + mux_stats.rx_bytes, + mux_stats.tx_msgs, + mux_stats.tx_bytes, + mux_stats.tx_retries, + mux_stats.psock_attach, + mux_stats.psock_unattach_rsvd, + mux_stats.psock_unattach, + mux_stats.rx_ready_drops); + + seq_printf(seq, + "%-8s %-10s %-16s %-10s %-16s %-10s %-10s %-10s %-10s %-10s %-10s %-10s %-10s %-10s %-10s %-10s\n", + "Psock", + "RX-Msgs", + "RX-Bytes", + "TX-Msgs", + "TX-Bytes", + "Reserved", + "Unreserved", + "RX-Aborts", + "RX-Intr", + "RX-Unrecov", + "RX-MemFail", + "RX-NeedMor", + "RX-BadLen", + "RX-TooBig", + "RX-Timeout", + "TX-Aborts"); + + seq_printf(seq, + "%-8s %-10llu %-16llu %-10llu %-16llu %-10llu %-10llu %-10u %-10u %-10u %-10u %-10u %-10u %-10u %-10u %-10u\n", + "", + strp_stats.msgs, + strp_stats.bytes, + psock_stats.tx_msgs, + psock_stats.tx_bytes, + psock_stats.reserved, + psock_stats.unreserved, + strp_stats.aborts, + strp_stats.interrupted, + strp_stats.unrecov_intr, + strp_stats.mem_fail, + strp_stats.need_more_hdr, + strp_stats.bad_hdr_len, + strp_stats.msg_too_big, + strp_stats.msg_timeouts, + psock_stats.tx_aborts); + + return 0; +} + +static int kcm_proc_init_net(struct net *net) +{ + if (!proc_create_net_single("kcm_stats", 0444, net->proc_net, + kcm_stats_seq_show, NULL)) + goto out_kcm_stats; + + if (!proc_create_net("kcm", 0444, net->proc_net, &kcm_seq_ops, + sizeof(struct kcm_proc_mux_state))) + goto out_kcm; + + return 0; + +out_kcm: + remove_proc_entry("kcm_stats", net->proc_net); +out_kcm_stats: + return -ENOMEM; +} + +static void kcm_proc_exit_net(struct net *net) +{ + remove_proc_entry("kcm", net->proc_net); + remove_proc_entry("kcm_stats", net->proc_net); +} + +static struct pernet_operations kcm_net_ops = { + .init = kcm_proc_init_net, + .exit = kcm_proc_exit_net, +}; + +int __init kcm_proc_init(void) +{ + return register_pernet_subsys(&kcm_net_ops); +} + +void __exit kcm_proc_exit(void) +{ + unregister_pernet_subsys(&kcm_net_ops); +} + +#endif /* CONFIG_PROC_FS */ -- cgit v1.3.1