Merge tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linuxgrafted

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
  ...

1 files changed, 270 insertions, 0 deletions

diff --git a/fs/smb/server/proc.c b/fs/smb/server/proc.c
new file mode 100644
index 000000000..826353ed0
--- /dev/null
+++ b/fs/smb/server/proc.c
@@ -0,0 +1,270 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *   Copyright (C) 2025, LG Electronics.
+ *   Author(s): Hyunchul Lee <hyc.lee@gmail.com>
+ *   Copyright (C) 2025, Samsung Electronics.
+ *   Author(s): Vedansh Bhardwaj <v.bhardwaj@samsung.com>
+ */
+
+#include <linux/module.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+
+#include "misc.h"
+#include "connection.h"
+#include "server.h"
+#include "stats.h"
+#include "smb_common.h"
+#include "smb2pdu.h"
+#include "vfs_cache.h"
+
+static struct proc_dir_entry *ksmbd_proc_fs;
+struct ksmbd_counters ksmbd_counters;
+
+struct proc_dir_entry *ksmbd_proc_create(const char *name,
+					 int (*show)(struct seq_file *m, void *v),
+						 void *v)
+{
+	return proc_create_single_data(name, 0400, ksmbd_proc_fs,
+			   show, v);
+}
+
+void ksmbd_proc_show_flag_names(struct seq_file *m,
+				const struct ksmbd_const_name *table,
+				int count, unsigned int flags)
+{
+	unsigned int remaining = flags;
+	bool separator = false;
+	int i;
+
+	for (i = 0; i < count; i++) {
+		unsigned int flag = table[i].const_value;
+
+		if (!flag || (remaining & flag) != flag)
+			continue;
+		seq_printf(m, "%s%s", separator ? "," : "", table[i].name);
+		separator = true;
+		remaining &= ~flag;
+	}
+
+	if (remaining)
+		seq_printf(m, "%s0x%08x", separator ? "," : "", remaining);
+	else if (!separator)
+		seq_puts(m, "none");
+}
+
+const char *ksmbd_proc_const_name(const struct ksmbd_const_name *table,
+				  int count, unsigned int const_value)
+{
+	int i;
+
+	for (i = 0; i < count; i++) {
+		if (table[i].const_value == const_value)
+			return table[i].name;
+	}
+	return NULL;
+}
+
+struct ksmbd_const_smb2_process_req {
+	unsigned int const_value;
+	const char *name;
+};
+
+static const struct ksmbd_const_smb2_process_req smb2_process_req[KSMBD_COUNTER_MAX_REQS] = {
+	{le16_to_cpu(SMB2_NEGOTIATE), "SMB2_NEGOTIATE"},
+	{le16_to_cpu(SMB2_SESSION_SETUP), "SMB2_SESSION_SETUP"},
+	{le16_to_cpu(SMB2_LOGOFF), "SMB2_LOGOFF"},
+	{le16_to_cpu(SMB2_TREE_CONNECT), "SMB2_TREE_CONNECT"},
+	{le16_to_cpu(SMB2_TREE_DISCONNECT), "SMB2_TREE_DISCONNECT"},
+	{le16_to_cpu(SMB2_CREATE), "SMB2_CREATE"},
+	{le16_to_cpu(SMB2_CLOSE), "SMB2_CLOSE"},
+	{le16_to_cpu(SMB2_FLUSH), "SMB2_FLUSH"},
+	{le16_to_cpu(SMB2_READ), "SMB2_READ"},
+	{le16_to_cpu(SMB2_WRITE), "SMB2_WRITE"},
+	{le16_to_cpu(SMB2_LOCK), "SMB2_LOCK"},
+	{le16_to_cpu(SMB2_IOCTL), "SMB2_IOCTL"},
+	{le16_to_cpu(SMB2_CANCEL), "SMB2_CANCEL"},
+	{le16_to_cpu(SMB2_ECHO), "SMB2_ECHO"},
+	{le16_to_cpu(SMB2_QUERY_DIRECTORY), "SMB2_QUERY_DIRECTORY"},
+	{le16_to_cpu(SMB2_CHANGE_NOTIFY), "SMB2_CHANGE_NOTIFY"},
+	{le16_to_cpu(SMB2_QUERY_INFO), "SMB2_QUERY_INFO"},
+	{le16_to_cpu(SMB2_SET_INFO), "SMB2_SET_INFO"},
+	{le16_to_cpu(SMB2_OPLOCK_BREAK), "SMB2_OPLOCK_BREAK"},
+};
+
+static const char *ksmbd_server_state_string(void)
+{
+	switch (READ_ONCE(server_conf.state)) {
+	case SERVER_STATE_STARTING_UP:
+		return "starting";
+	case SERVER_STATE_RUNNING:
+		return "running";
+	case SERVER_STATE_RESETTING:
+		return "resetting";
+	case SERVER_STATE_SHUTTING_DOWN:
+		return "shutdown";
+	default:
+		return "unknown";
+	}
+}
+
+static const char *ksmbd_signing_mode_string(void)
+{
+	switch (server_conf.signing) {
+	case KSMBD_CONFIG_OPT_DISABLED:
+		return "disabled";
+	case KSMBD_CONFIG_OPT_MANDATORY:
+		return "mandatory";
+	case KSMBD_CONFIG_OPT_AUTO:
+		return "auto";
+	default:
+		return "unknown";
+	}
+}
+
+static void proc_show_runtime_totals(struct seq_file *m)
+{
+	struct ksmbd_conn *conn;
+	unsigned int clients = 0;
+	unsigned int open_files = 0;
+	int i;
+
+	down_read(&conn_list_lock);
+	hash_for_each(conn_list, i, conn, hlist) {
+		clients++;
+		open_files += atomic_read(&conn->stats.open_files_count);
+	}
+	up_read(&conn_list_lock);
+
+	seq_printf(m, "clients:\t%u\n", clients);
+	seq_printf(m, "open_files:\t%u\n", open_files);
+}
+
+static int proc_show_ksmbd_stats(struct seq_file *m, void *v)
+{
+	int i;
+
+	seq_puts(m, "Server\n");
+	seq_printf(m, "state:\t%s\n", ksmbd_server_state_string());
+	seq_printf(m, "name:\t%s\n", ksmbd_server_string());
+	seq_printf(m, "netbios:\t%s\n", ksmbd_netbios_name());
+	seq_printf(m, "work_group:\t%s\n", ksmbd_work_group());
+	seq_printf(m, "min_protocol:\t%s\n", ksmbd_get_protocol_string(server_conf.min_protocol));
+	seq_printf(m, "max_protocol:\t%s\n", ksmbd_get_protocol_string(server_conf.max_protocol));
+	seq_printf(m, "flags:\t0x%08x\n", server_conf.flags);
+	seq_printf(m, "tcp_port:\t%u\n", server_conf.tcp_port);
+	seq_printf(m, "signing:\t%s\n", ksmbd_signing_mode_string());
+	seq_printf(m, "signing_enforced:\t%s\n",
+		   server_conf.enforced_signing ? "yes" : "no");
+	seq_printf(m, "bind_interfaces_only:\t%s\n",
+		   server_conf.bind_interfaces_only ? "yes" : "no");
+	seq_printf(m, "max_connections:\t%u\n", server_conf.max_connections);
+	seq_printf(m, "max_connections_per_ip:\t%u\n",
+		   server_conf.max_ip_connections);
+	seq_printf(m, "max_inflight_requests:\t%u\n",
+		   server_conf.max_inflight_req);
+	seq_printf(m, "deadtime_seconds:\t%lu\n", server_conf.deadtime / HZ);
+	seq_printf(m, "ipc_timeout_seconds:\t%u\n", server_conf.ipc_timeout / HZ);
+	if (server_conf.ipc_last_active)
+		seq_printf(m, "ipc_last_active_seconds:\t%lu\n",
+			   jiffies_to_msecs(jiffies - server_conf.ipc_last_active) /
+			   MSEC_PER_SEC);
+	else
+		seq_puts(m, "ipc_last_active_seconds:\tnever\n");
+	seq_printf(m, "durable_scavenger:\t%s\n",
+		   ksmbd_durable_scavenger_active() ? "running" : "stopped");
+	seq_printf(m, "share_fake_fscaps:\t0x%08x\n",
+		   server_conf.share_fake_fscaps);
+	proc_show_runtime_totals(m);
+	seq_printf(m, "sessions:\t%lld\n",
+		   ksmbd_counter_sum(KSMBD_COUNTER_SESSIONS));
+	seq_printf(m, "tree_connects:\t%lld\n",
+		   ksmbd_counter_sum(KSMBD_COUNTER_TREE_CONNS));
+	seq_printf(m, "requests:\t%lld\n",
+		   ksmbd_counter_sum(KSMBD_COUNTER_REQUESTS));
+	seq_printf(m, "read_bytes:\t%lld\n",
+		   ksmbd_counter_sum(KSMBD_COUNTER_READ_BYTES));
+	seq_printf(m, "written_bytes:\t%lld\n",
+		   ksmbd_counter_sum(KSMBD_COUNTER_WRITE_BYTES));
+
+	seq_puts(m, "\nSMB2\n");
+	for (i = 0; i < KSMBD_COUNTER_MAX_REQS; i++)
+		seq_printf(m, "%s:\t%lld\n", smb2_process_req[i].name,
+			   ksmbd_counter_sum(KSMBD_COUNTER_FIRST_REQ + i));
+
+	seq_puts(m, "\nSMB2 status\n");
+	seq_printf(m, "success:\t%lld\n",
+		   ksmbd_counter_sum(KSMBD_COUNTER_STATUS_SUCCESS));
+	seq_printf(m, "informational:\t%lld\n",
+		   ksmbd_counter_sum(KSMBD_COUNTER_STATUS_INFORMATIONAL));
+	seq_printf(m, "warning:\t%lld\n",
+		   ksmbd_counter_sum(KSMBD_COUNTER_STATUS_WARNING));
+	seq_printf(m, "error:\t%lld\n",
+		   ksmbd_counter_sum(KSMBD_COUNTER_STATUS_ERROR));
+	seq_printf(m, "access_denied:\t%lld\n",
+		   ksmbd_counter_sum(KSMBD_COUNTER_ERROR_ACCESS_DENIED));
+	seq_printf(m, "not_found:\t%lld\n",
+		   ksmbd_counter_sum(KSMBD_COUNTER_ERROR_NOT_FOUND));
+	seq_printf(m, "invalid_parameter:\t%lld\n",
+		   ksmbd_counter_sum(KSMBD_COUNTER_ERROR_INVALID_PARAMETER));
+	seq_printf(m, "sharing_violation:\t%lld\n",
+		   ksmbd_counter_sum(KSMBD_COUNTER_ERROR_SHARING_VIOLATION));
+	seq_printf(m, "not_supported:\t%lld\n",
+		   ksmbd_counter_sum(KSMBD_COUNTER_ERROR_NOT_SUPPORTED));
+	seq_printf(m, "other:\t%lld\n",
+		   ksmbd_counter_sum(KSMBD_COUNTER_ERROR_OTHER));
+	return 0;
+}
+
+void ksmbd_proc_cleanup(void)
+{
+	int i;
+
+	if (!ksmbd_proc_fs)
+		return;
+
+	proc_remove(ksmbd_proc_fs);
+
+	for (i = 0; i < ARRAY_SIZE(ksmbd_counters.counters); i++)
+		percpu_counter_destroy(&ksmbd_counters.counters[i]);
+
+	ksmbd_proc_fs = NULL;
+}
+
+void ksmbd_proc_reset(void)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(ksmbd_counters.counters); i++)
+		percpu_counter_set(&ksmbd_counters.counters[i], 0);
+}
+
+int ksmbd_proc_init(void)
+{
+	int i;
+	int retval = -ENOMEM;
+
+	ksmbd_proc_fs = proc_mkdir("fs/ksmbd", NULL);
+	if (!ksmbd_proc_fs)
+		return retval;
+
+	if (!proc_mkdir_mode("sessions", 0400, ksmbd_proc_fs))
+		goto err_out;
+
+	for (i = 0; i < ARRAY_SIZE(ksmbd_counters.counters); i++) {
+		retval = percpu_counter_init(&ksmbd_counters.counters[i], 0, GFP_KERNEL);
+		if (retval)
+			goto err_out;
+	}
+
+	if (!ksmbd_proc_create("server", proc_show_ksmbd_stats, NULL)) {
+		retval = -ENOMEM;
+		goto err_out;
+	}
+
+	ksmbd_proc_reset();
+	return 0;
+err_out:
+	ksmbd_proc_cleanup();
+	return retval;
+}