v4.19.13 snapshot.
diff --git a/fs/cifs/cifs_debug.c b/fs/cifs/cifs_debug.c
new file mode 100644
index 0000000..0657679
--- /dev/null
+++ b/fs/cifs/cifs_debug.c
@@ -0,0 +1,871 @@
+/*
+ * fs/cifs_debug.c
+ *
+ * Copyright (C) International Business Machines Corp., 2000,2005
+ *
+ * Modified by Steve French (sfrench@us.ibm.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
+ * the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#include <linux/fs.h>
+#include <linux/string.h>
+#include <linux/ctype.h>
+#include <linux/module.h>
+#include <linux/proc_fs.h>
+#include <linux/uaccess.h>
+#include "cifspdu.h"
+#include "cifsglob.h"
+#include "cifsproto.h"
+#include "cifs_debug.h"
+#include "cifsfs.h"
+#ifdef CONFIG_CIFS_SMB_DIRECT
+#include "smbdirect.h"
+#endif
+
+void
+cifs_dump_mem(char *label, void *data, int length)
+{
+ pr_debug("%s: dump of %d bytes of data at 0x%p\n", label, length, data);
+ print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 16, 4,
+ data, length, true);
+}
+
+void cifs_dump_detail(void *buf, struct TCP_Server_Info *server)
+{
+#ifdef CONFIG_CIFS_DEBUG2
+ struct smb_hdr *smb = (struct smb_hdr *)buf;
+
+ cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Flgs2: 0x%x Mid: %d Pid: %d\n",
+ smb->Command, smb->Status.CifsError,
+ smb->Flags, smb->Flags2, smb->Mid, smb->Pid);
+ cifs_dbg(VFS, "smb buf %p len %u\n", smb,
+ server->ops->calc_smb_size(smb, server));
+#endif /* CONFIG_CIFS_DEBUG2 */
+}
+
+void cifs_dump_mids(struct TCP_Server_Info *server)
+{
+#ifdef CONFIG_CIFS_DEBUG2
+ struct list_head *tmp;
+ struct mid_q_entry *mid_entry;
+
+ if (server == NULL)
+ return;
+
+ cifs_dbg(VFS, "Dump pending requests:\n");
+ spin_lock(&GlobalMid_Lock);
+ list_for_each(tmp, &server->pending_mid_q) {
+ mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
+ cifs_dbg(VFS, "State: %d Cmd: %d Pid: %d Cbdata: %p Mid %llu\n",
+ mid_entry->mid_state,
+ le16_to_cpu(mid_entry->command),
+ mid_entry->pid,
+ mid_entry->callback_data,
+ mid_entry->mid);
+#ifdef CONFIG_CIFS_STATS2
+ cifs_dbg(VFS, "IsLarge: %d buf: %p time rcv: %ld now: %ld\n",
+ mid_entry->large_buf,
+ mid_entry->resp_buf,
+ mid_entry->when_received,
+ jiffies);
+#endif /* STATS2 */
+ cifs_dbg(VFS, "IsMult: %d IsEnd: %d\n",
+ mid_entry->multiRsp, mid_entry->multiEnd);
+ if (mid_entry->resp_buf) {
+ cifs_dump_detail(mid_entry->resp_buf, server);
+ cifs_dump_mem("existing buf: ",
+ mid_entry->resp_buf, 62);
+ }
+ }
+ spin_unlock(&GlobalMid_Lock);
+#endif /* CONFIG_CIFS_DEBUG2 */
+}
+
+#ifdef CONFIG_PROC_FS
+static void cifs_debug_tcon(struct seq_file *m, struct cifs_tcon *tcon)
+{
+ __u32 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
+
+ seq_printf(m, "%s Mounts: %d ", tcon->treeName, tcon->tc_count);
+ if (tcon->nativeFileSystem)
+ seq_printf(m, "Type: %s ", tcon->nativeFileSystem);
+ seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x\n\tPathComponentMax: %d Status: %d",
+ le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
+ le32_to_cpu(tcon->fsAttrInfo.Attributes),
+ le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
+ tcon->tidStatus);
+ if (dev_type == FILE_DEVICE_DISK)
+ seq_puts(m, " type: DISK ");
+ else if (dev_type == FILE_DEVICE_CD_ROM)
+ seq_puts(m, " type: CDROM ");
+ else
+ seq_printf(m, " type: %d ", dev_type);
+ if (tcon->seal)
+ seq_printf(m, " Encrypted");
+ if (tcon->nocase)
+ seq_printf(m, " nocase");
+ if (tcon->unix_ext)
+ seq_printf(m, " POSIX Extensions");
+ if (tcon->ses->server->ops->dump_share_caps)
+ tcon->ses->server->ops->dump_share_caps(m, tcon);
+
+ if (tcon->need_reconnect)
+ seq_puts(m, "\tDISCONNECTED ");
+ seq_putc(m, '\n');
+}
+
+static void
+cifs_dump_iface(struct seq_file *m, struct cifs_server_iface *iface)
+{
+ struct sockaddr_in *ipv4 = (struct sockaddr_in *)&iface->sockaddr;
+ struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)&iface->sockaddr;
+
+ seq_printf(m, "\t\tSpeed: %zu bps\n", iface->speed);
+ seq_puts(m, "\t\tCapabilities: ");
+ if (iface->rdma_capable)
+ seq_puts(m, "rdma ");
+ if (iface->rss_capable)
+ seq_puts(m, "rss ");
+ seq_putc(m, '\n');
+ if (iface->sockaddr.ss_family == AF_INET)
+ seq_printf(m, "\t\tIPv4: %pI4\n", &ipv4->sin_addr);
+ else if (iface->sockaddr.ss_family == AF_INET6)
+ seq_printf(m, "\t\tIPv6: %pI6\n", &ipv6->sin6_addr);
+}
+
+static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
+{
+ struct list_head *tmp1, *tmp2, *tmp3;
+ struct mid_q_entry *mid_entry;
+ struct TCP_Server_Info *server;
+ struct cifs_ses *ses;
+ struct cifs_tcon *tcon;
+ int i, j;
+
+ seq_puts(m,
+ "Display Internal CIFS Data Structures for Debugging\n"
+ "---------------------------------------------------\n");
+ seq_printf(m, "CIFS Version %s\n", CIFS_VERSION);
+ seq_printf(m, "Features:");
+#ifdef CONFIG_CIFS_DFS_UPCALL
+ seq_printf(m, " DFS");
+#endif
+#ifdef CONFIG_CIFS_FSCACHE
+ seq_printf(m, ",FSCACHE");
+#endif
+#ifdef CONFIG_CIFS_SMB_DIRECT
+ seq_printf(m, ",SMB_DIRECT");
+#endif
+#ifdef CONFIG_CIFS_STATS2
+ seq_printf(m, ",STATS2");
+#else
+ seq_printf(m, ",STATS");
+#endif
+#ifdef CONFIG_CIFS_DEBUG2
+ seq_printf(m, ",DEBUG2");
+#elif defined(CONFIG_CIFS_DEBUG)
+ seq_printf(m, ",DEBUG");
+#endif
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+ seq_printf(m, ",ALLOW_INSECURE_LEGACY");
+#endif
+#ifdef CONFIG_CIFS_WEAK_PW_HASH
+ seq_printf(m, ",WEAK_PW_HASH");
+#endif
+#ifdef CONFIG_CIFS_POSIX
+ seq_printf(m, ",CIFS_POSIX");
+#endif
+#ifdef CONFIG_CIFS_UPCALL
+ seq_printf(m, ",UPCALL(SPNEGO)");
+#endif
+#ifdef CONFIG_CIFS_XATTR
+ seq_printf(m, ",XATTR");
+#endif
+#ifdef CONFIG_CIFS_ACL
+ seq_printf(m, ",ACL");
+#endif
+ seq_putc(m, '\n');
+ seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
+ seq_printf(m, "Servers:");
+
+ i = 0;
+ spin_lock(&cifs_tcp_ses_lock);
+ list_for_each(tmp1, &cifs_tcp_ses_list) {
+ server = list_entry(tmp1, struct TCP_Server_Info,
+ tcp_ses_list);
+
+#ifdef CONFIG_CIFS_SMB_DIRECT
+ if (!server->rdma)
+ goto skip_rdma;
+
+ seq_printf(m, "\nSMBDirect (in hex) protocol version: %x "
+ "transport status: %x",
+ server->smbd_conn->protocol,
+ server->smbd_conn->transport_status);
+ seq_printf(m, "\nConn receive_credit_max: %x "
+ "send_credit_target: %x max_send_size: %x",
+ server->smbd_conn->receive_credit_max,
+ server->smbd_conn->send_credit_target,
+ server->smbd_conn->max_send_size);
+ seq_printf(m, "\nConn max_fragmented_recv_size: %x "
+ "max_fragmented_send_size: %x max_receive_size:%x",
+ server->smbd_conn->max_fragmented_recv_size,
+ server->smbd_conn->max_fragmented_send_size,
+ server->smbd_conn->max_receive_size);
+ seq_printf(m, "\nConn keep_alive_interval: %x "
+ "max_readwrite_size: %x rdma_readwrite_threshold: %x",
+ server->smbd_conn->keep_alive_interval,
+ server->smbd_conn->max_readwrite_size,
+ server->smbd_conn->rdma_readwrite_threshold);
+ seq_printf(m, "\nDebug count_get_receive_buffer: %x "
+ "count_put_receive_buffer: %x count_send_empty: %x",
+ server->smbd_conn->count_get_receive_buffer,
+ server->smbd_conn->count_put_receive_buffer,
+ server->smbd_conn->count_send_empty);
+ seq_printf(m, "\nRead Queue count_reassembly_queue: %x "
+ "count_enqueue_reassembly_queue: %x "
+ "count_dequeue_reassembly_queue: %x "
+ "fragment_reassembly_remaining: %x "
+ "reassembly_data_length: %x "
+ "reassembly_queue_length: %x",
+ server->smbd_conn->count_reassembly_queue,
+ server->smbd_conn->count_enqueue_reassembly_queue,
+ server->smbd_conn->count_dequeue_reassembly_queue,
+ server->smbd_conn->fragment_reassembly_remaining,
+ server->smbd_conn->reassembly_data_length,
+ server->smbd_conn->reassembly_queue_length);
+ seq_printf(m, "\nCurrent Credits send_credits: %x "
+ "receive_credits: %x receive_credit_target: %x",
+ atomic_read(&server->smbd_conn->send_credits),
+ atomic_read(&server->smbd_conn->receive_credits),
+ server->smbd_conn->receive_credit_target);
+ seq_printf(m, "\nPending send_pending: %x send_payload_pending:"
+ " %x smbd_send_pending: %x smbd_recv_pending: %x",
+ atomic_read(&server->smbd_conn->send_pending),
+ atomic_read(&server->smbd_conn->send_payload_pending),
+ server->smbd_conn->smbd_send_pending,
+ server->smbd_conn->smbd_recv_pending);
+ seq_printf(m, "\nReceive buffers count_receive_queue: %x "
+ "count_empty_packet_queue: %x",
+ server->smbd_conn->count_receive_queue,
+ server->smbd_conn->count_empty_packet_queue);
+ seq_printf(m, "\nMR responder_resources: %x "
+ "max_frmr_depth: %x mr_type: %x",
+ server->smbd_conn->responder_resources,
+ server->smbd_conn->max_frmr_depth,
+ server->smbd_conn->mr_type);
+ seq_printf(m, "\nMR mr_ready_count: %x mr_used_count: %x",
+ atomic_read(&server->smbd_conn->mr_ready_count),
+ atomic_read(&server->smbd_conn->mr_used_count));
+skip_rdma:
+#endif
+ seq_printf(m, "\nNumber of credits: %d Dialect 0x%x",
+ server->credits, server->dialect);
+ if (server->sign)
+ seq_printf(m, " signed");
+ if (server->posix_ext_supported)
+ seq_printf(m, " posix");
+
+ i++;
+ list_for_each(tmp2, &server->smb_ses_list) {
+ ses = list_entry(tmp2, struct cifs_ses,
+ smb_ses_list);
+ if ((ses->serverDomain == NULL) ||
+ (ses->serverOS == NULL) ||
+ (ses->serverNOS == NULL)) {
+ seq_printf(m, "\n%d) Name: %s Uses: %d Capability: 0x%x\tSession Status: %d\t",
+ i, ses->serverName, ses->ses_count,
+ ses->capabilities, ses->status);
+ if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
+ seq_printf(m, "Guest\t");
+ else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
+ seq_printf(m, "Anonymous\t");
+ } else {
+ seq_printf(m,
+ "\n%d) Name: %s Domain: %s Uses: %d OS:"
+ " %s\n\tNOS: %s\tCapability: 0x%x\n\tSMB"
+ " session status: %d\t",
+ i, ses->serverName, ses->serverDomain,
+ ses->ses_count, ses->serverOS, ses->serverNOS,
+ ses->capabilities, ses->status);
+ }
+ if (server->rdma)
+ seq_printf(m, "RDMA\n\t");
+ seq_printf(m, "TCP status: %d\n\tLocal Users To "
+ "Server: %d SecMode: 0x%x Req On Wire: %d",
+ server->tcpStatus, server->srv_count,
+ server->sec_mode, in_flight(server));
+
+#ifdef CONFIG_CIFS_STATS2
+ seq_printf(m, " In Send: %d In MaxReq Wait: %d",
+ atomic_read(&server->in_send),
+ atomic_read(&server->num_waiters));
+#endif
+
+ seq_puts(m, "\n\tShares:");
+ j = 0;
+
+ seq_printf(m, "\n\t%d) IPC: ", j);
+ if (ses->tcon_ipc)
+ cifs_debug_tcon(m, ses->tcon_ipc);
+ else
+ seq_puts(m, "none\n");
+
+ list_for_each(tmp3, &ses->tcon_list) {
+ tcon = list_entry(tmp3, struct cifs_tcon,
+ tcon_list);
+ ++j;
+ seq_printf(m, "\n\t%d) ", j);
+ cifs_debug_tcon(m, tcon);
+ }
+
+ seq_puts(m, "\n\tMIDs:\n");
+
+ spin_lock(&GlobalMid_Lock);
+ list_for_each(tmp3, &server->pending_mid_q) {
+ mid_entry = list_entry(tmp3, struct mid_q_entry,
+ qhead);
+ seq_printf(m, "\tState: %d com: %d pid:"
+ " %d cbdata: %p mid %llu\n",
+ mid_entry->mid_state,
+ le16_to_cpu(mid_entry->command),
+ mid_entry->pid,
+ mid_entry->callback_data,
+ mid_entry->mid);
+ }
+ spin_unlock(&GlobalMid_Lock);
+
+ spin_lock(&ses->iface_lock);
+ if (ses->iface_count)
+ seq_printf(m, "\n\tServer interfaces: %zu\n",
+ ses->iface_count);
+ for (j = 0; j < ses->iface_count; j++) {
+ seq_printf(m, "\t%d)\n", j);
+ cifs_dump_iface(m, &ses->iface_list[j]);
+ }
+ spin_unlock(&ses->iface_lock);
+ }
+ }
+ spin_unlock(&cifs_tcp_ses_lock);
+ seq_putc(m, '\n');
+
+ /* BB add code to dump additional info such as TCP session info now */
+ return 0;
+}
+
+static ssize_t cifs_stats_proc_write(struct file *file,
+ const char __user *buffer, size_t count, loff_t *ppos)
+{
+ bool bv;
+ int rc;
+ struct list_head *tmp1, *tmp2, *tmp3;
+ struct TCP_Server_Info *server;
+ struct cifs_ses *ses;
+ struct cifs_tcon *tcon;
+
+ rc = kstrtobool_from_user(buffer, count, &bv);
+ if (rc == 0) {
+#ifdef CONFIG_CIFS_STATS2
+ int i;
+
+ atomic_set(&totBufAllocCount, 0);
+ atomic_set(&totSmBufAllocCount, 0);
+#endif /* CONFIG_CIFS_STATS2 */
+ atomic_set(&tcpSesReconnectCount, 0);
+ atomic_set(&tconInfoReconnectCount, 0);
+
+ spin_lock(&GlobalMid_Lock);
+ GlobalMaxActiveXid = 0;
+ GlobalCurrentXid = 0;
+ spin_unlock(&GlobalMid_Lock);
+ spin_lock(&cifs_tcp_ses_lock);
+ list_for_each(tmp1, &cifs_tcp_ses_list) {
+ server = list_entry(tmp1, struct TCP_Server_Info,
+ tcp_ses_list);
+#ifdef CONFIG_CIFS_STATS2
+ for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++)
+ atomic_set(&server->smb2slowcmd[i], 0);
+#endif /* CONFIG_CIFS_STATS2 */
+ list_for_each(tmp2, &server->smb_ses_list) {
+ ses = list_entry(tmp2, struct cifs_ses,
+ smb_ses_list);
+ list_for_each(tmp3, &ses->tcon_list) {
+ tcon = list_entry(tmp3,
+ struct cifs_tcon,
+ tcon_list);
+ atomic_set(&tcon->num_smbs_sent, 0);
+ spin_lock(&tcon->stat_lock);
+ tcon->bytes_read = 0;
+ tcon->bytes_written = 0;
+ spin_unlock(&tcon->stat_lock);
+ if (server->ops->clear_stats)
+ server->ops->clear_stats(tcon);
+ }
+ }
+ }
+ spin_unlock(&cifs_tcp_ses_lock);
+ } else {
+ return rc;
+ }
+
+ return count;
+}
+
+static int cifs_stats_proc_show(struct seq_file *m, void *v)
+{
+ int i;
+#ifdef CONFIG_CIFS_STATS2
+ int j;
+#endif /* STATS2 */
+ struct list_head *tmp1, *tmp2, *tmp3;
+ struct TCP_Server_Info *server;
+ struct cifs_ses *ses;
+ struct cifs_tcon *tcon;
+
+ seq_printf(m, "Resources in use\nCIFS Session: %d\n",
+ sesInfoAllocCount.counter);
+ seq_printf(m, "Share (unique mount targets): %d\n",
+ tconInfoAllocCount.counter);
+ seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
+ bufAllocCount.counter,
+ cifs_min_rcv + tcpSesAllocCount.counter);
+ seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
+ smBufAllocCount.counter, cifs_min_small);
+#ifdef CONFIG_CIFS_STATS2
+ seq_printf(m, "Total Large %d Small %d Allocations\n",
+ atomic_read(&totBufAllocCount),
+ atomic_read(&totSmBufAllocCount));
+#endif /* CONFIG_CIFS_STATS2 */
+
+ seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&midCount));
+ seq_printf(m,
+ "\n%d session %d share reconnects\n",
+ tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
+
+ seq_printf(m,
+ "Total vfs operations: %d maximum at one time: %d\n",
+ GlobalCurrentXid, GlobalMaxActiveXid);
+
+ i = 0;
+ spin_lock(&cifs_tcp_ses_lock);
+ list_for_each(tmp1, &cifs_tcp_ses_list) {
+ server = list_entry(tmp1, struct TCP_Server_Info,
+ tcp_ses_list);
+#ifdef CONFIG_CIFS_STATS2
+ for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
+ if (atomic_read(&server->smb2slowcmd[j]))
+ seq_printf(m, "%d slow responses from %s for command %d\n",
+ atomic_read(&server->smb2slowcmd[j]),
+ server->hostname, j);
+#endif /* STATS2 */
+ list_for_each(tmp2, &server->smb_ses_list) {
+ ses = list_entry(tmp2, struct cifs_ses,
+ smb_ses_list);
+ list_for_each(tmp3, &ses->tcon_list) {
+ tcon = list_entry(tmp3,
+ struct cifs_tcon,
+ tcon_list);
+ i++;
+ seq_printf(m, "\n%d) %s", i, tcon->treeName);
+ if (tcon->need_reconnect)
+ seq_puts(m, "\tDISCONNECTED ");
+ seq_printf(m, "\nSMBs: %d",
+ atomic_read(&tcon->num_smbs_sent));
+ if (server->ops->print_stats)
+ server->ops->print_stats(m, tcon);
+ }
+ }
+ }
+ spin_unlock(&cifs_tcp_ses_lock);
+
+ seq_putc(m, '\n');
+ return 0;
+}
+
+static int cifs_stats_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, cifs_stats_proc_show, NULL);
+}
+
+static const struct file_operations cifs_stats_proc_fops = {
+ .open = cifs_stats_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+ .write = cifs_stats_proc_write,
+};
+
+#ifdef CONFIG_CIFS_SMB_DIRECT
+#define PROC_FILE_DEFINE(name) \
+static ssize_t name##_write(struct file *file, const char __user *buffer, \
+ size_t count, loff_t *ppos) \
+{ \
+ int rc; \
+ rc = kstrtoint_from_user(buffer, count, 10, & name); \
+ if (rc) \
+ return rc; \
+ return count; \
+} \
+static int name##_proc_show(struct seq_file *m, void *v) \
+{ \
+ seq_printf(m, "%d\n", name ); \
+ return 0; \
+} \
+static int name##_open(struct inode *inode, struct file *file) \
+{ \
+ return single_open(file, name##_proc_show, NULL); \
+} \
+\
+static const struct file_operations cifs_##name##_proc_fops = { \
+ .open = name##_open, \
+ .read = seq_read, \
+ .llseek = seq_lseek, \
+ .release = single_release, \
+ .write = name##_write, \
+}
+
+PROC_FILE_DEFINE(rdma_readwrite_threshold);
+PROC_FILE_DEFINE(smbd_max_frmr_depth);
+PROC_FILE_DEFINE(smbd_keep_alive_interval);
+PROC_FILE_DEFINE(smbd_max_receive_size);
+PROC_FILE_DEFINE(smbd_max_fragmented_recv_size);
+PROC_FILE_DEFINE(smbd_max_send_size);
+PROC_FILE_DEFINE(smbd_send_credit_target);
+PROC_FILE_DEFINE(smbd_receive_credit_max);
+#endif
+
+static struct proc_dir_entry *proc_fs_cifs;
+static const struct file_operations cifsFYI_proc_fops;
+static const struct file_operations cifs_lookup_cache_proc_fops;
+static const struct file_operations traceSMB_proc_fops;
+static const struct file_operations cifs_security_flags_proc_fops;
+static const struct file_operations cifs_linux_ext_proc_fops;
+
+void
+cifs_proc_init(void)
+{
+ proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
+ if (proc_fs_cifs == NULL)
+ return;
+
+ proc_create_single("DebugData", 0, proc_fs_cifs,
+ cifs_debug_data_proc_show);
+
+ proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_fops);
+ proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_fops);
+ proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_fops);
+ proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs,
+ &cifs_linux_ext_proc_fops);
+ proc_create("SecurityFlags", 0644, proc_fs_cifs,
+ &cifs_security_flags_proc_fops);
+ proc_create("LookupCacheEnabled", 0644, proc_fs_cifs,
+ &cifs_lookup_cache_proc_fops);
+#ifdef CONFIG_CIFS_SMB_DIRECT
+ proc_create("rdma_readwrite_threshold", 0644, proc_fs_cifs,
+ &cifs_rdma_readwrite_threshold_proc_fops);
+ proc_create("smbd_max_frmr_depth", 0644, proc_fs_cifs,
+ &cifs_smbd_max_frmr_depth_proc_fops);
+ proc_create("smbd_keep_alive_interval", 0644, proc_fs_cifs,
+ &cifs_smbd_keep_alive_interval_proc_fops);
+ proc_create("smbd_max_receive_size", 0644, proc_fs_cifs,
+ &cifs_smbd_max_receive_size_proc_fops);
+ proc_create("smbd_max_fragmented_recv_size", 0644, proc_fs_cifs,
+ &cifs_smbd_max_fragmented_recv_size_proc_fops);
+ proc_create("smbd_max_send_size", 0644, proc_fs_cifs,
+ &cifs_smbd_max_send_size_proc_fops);
+ proc_create("smbd_send_credit_target", 0644, proc_fs_cifs,
+ &cifs_smbd_send_credit_target_proc_fops);
+ proc_create("smbd_receive_credit_max", 0644, proc_fs_cifs,
+ &cifs_smbd_receive_credit_max_proc_fops);
+#endif
+}
+
+void
+cifs_proc_clean(void)
+{
+ if (proc_fs_cifs == NULL)
+ return;
+
+ remove_proc_entry("DebugData", proc_fs_cifs);
+ remove_proc_entry("cifsFYI", proc_fs_cifs);
+ remove_proc_entry("traceSMB", proc_fs_cifs);
+ remove_proc_entry("Stats", proc_fs_cifs);
+ remove_proc_entry("SecurityFlags", proc_fs_cifs);
+ remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
+ remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
+#ifdef CONFIG_CIFS_SMB_DIRECT
+ remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs);
+ remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs);
+ remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs);
+ remove_proc_entry("smbd_max_receive_size", proc_fs_cifs);
+ remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs);
+ remove_proc_entry("smbd_max_send_size", proc_fs_cifs);
+ remove_proc_entry("smbd_send_credit_target", proc_fs_cifs);
+ remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs);
+#endif
+ remove_proc_entry("fs/cifs", NULL);
+}
+
+static int cifsFYI_proc_show(struct seq_file *m, void *v)
+{
+ seq_printf(m, "%d\n", cifsFYI);
+ return 0;
+}
+
+static int cifsFYI_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, cifsFYI_proc_show, NULL);
+}
+
+static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
+ size_t count, loff_t *ppos)
+{
+ char c[2] = { '\0' };
+ bool bv;
+ int rc;
+
+ rc = get_user(c[0], buffer);
+ if (rc)
+ return rc;
+ if (strtobool(c, &bv) == 0)
+ cifsFYI = bv;
+ else if ((c[0] > '1') && (c[0] <= '9'))
+ cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */
+ else
+ return -EINVAL;
+
+ return count;
+}
+
+static const struct file_operations cifsFYI_proc_fops = {
+ .open = cifsFYI_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+ .write = cifsFYI_proc_write,
+};
+
+static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
+{
+ seq_printf(m, "%d\n", linuxExtEnabled);
+ return 0;
+}
+
+static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, cifs_linux_ext_proc_show, NULL);
+}
+
+static ssize_t cifs_linux_ext_proc_write(struct file *file,
+ const char __user *buffer, size_t count, loff_t *ppos)
+{
+ int rc;
+
+ rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled);
+ if (rc)
+ return rc;
+
+ return count;
+}
+
+static const struct file_operations cifs_linux_ext_proc_fops = {
+ .open = cifs_linux_ext_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+ .write = cifs_linux_ext_proc_write,
+};
+
+static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
+{
+ seq_printf(m, "%d\n", lookupCacheEnabled);
+ return 0;
+}
+
+static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, cifs_lookup_cache_proc_show, NULL);
+}
+
+static ssize_t cifs_lookup_cache_proc_write(struct file *file,
+ const char __user *buffer, size_t count, loff_t *ppos)
+{
+ int rc;
+
+ rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
+ if (rc)
+ return rc;
+
+ return count;
+}
+
+static const struct file_operations cifs_lookup_cache_proc_fops = {
+ .open = cifs_lookup_cache_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+ .write = cifs_lookup_cache_proc_write,
+};
+
+static int traceSMB_proc_show(struct seq_file *m, void *v)
+{
+ seq_printf(m, "%d\n", traceSMB);
+ return 0;
+}
+
+static int traceSMB_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, traceSMB_proc_show, NULL);
+}
+
+static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
+ size_t count, loff_t *ppos)
+{
+ int rc;
+
+ rc = kstrtobool_from_user(buffer, count, &traceSMB);
+ if (rc)
+ return rc;
+
+ return count;
+}
+
+static const struct file_operations traceSMB_proc_fops = {
+ .open = traceSMB_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+ .write = traceSMB_proc_write,
+};
+
+static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
+{
+ seq_printf(m, "0x%x\n", global_secflags);
+ return 0;
+}
+
+static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, cifs_security_flags_proc_show, NULL);
+}
+
+/*
+ * Ensure that if someone sets a MUST flag, that we disable all other MAY
+ * flags except for the ones corresponding to the given MUST flag. If there are
+ * multiple MUST flags, then try to prefer more secure ones.
+ */
+static void
+cifs_security_flags_handle_must_flags(unsigned int *flags)
+{
+ unsigned int signflags = *flags & CIFSSEC_MUST_SIGN;
+
+ if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
+ *flags = CIFSSEC_MUST_KRB5;
+ else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
+ *flags = CIFSSEC_MUST_NTLMSSP;
+ else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
+ *flags = CIFSSEC_MUST_NTLMV2;
+ else if ((*flags & CIFSSEC_MUST_NTLM) == CIFSSEC_MUST_NTLM)
+ *flags = CIFSSEC_MUST_NTLM;
+ else if (CIFSSEC_MUST_LANMAN &&
+ (*flags & CIFSSEC_MUST_LANMAN) == CIFSSEC_MUST_LANMAN)
+ *flags = CIFSSEC_MUST_LANMAN;
+ else if (CIFSSEC_MUST_PLNTXT &&
+ (*flags & CIFSSEC_MUST_PLNTXT) == CIFSSEC_MUST_PLNTXT)
+ *flags = CIFSSEC_MUST_PLNTXT;
+
+ *flags |= signflags;
+}
+
+static ssize_t cifs_security_flags_proc_write(struct file *file,
+ const char __user *buffer, size_t count, loff_t *ppos)
+{
+ int rc;
+ unsigned int flags;
+ char flags_string[12];
+ bool bv;
+
+ if ((count < 1) || (count > 11))
+ return -EINVAL;
+
+ memset(flags_string, 0, 12);
+
+ if (copy_from_user(flags_string, buffer, count))
+ return -EFAULT;
+
+ if (count < 3) {
+ /* single char or single char followed by null */
+ if (strtobool(flags_string, &bv) == 0) {
+ global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
+ return count;
+ } else if (!isdigit(flags_string[0])) {
+ cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
+ flags_string);
+ return -EINVAL;
+ }
+ }
+
+ /* else we have a number */
+ rc = kstrtouint(flags_string, 0, &flags);
+ if (rc) {
+ cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
+ flags_string);
+ return rc;
+ }
+
+ cifs_dbg(FYI, "sec flags 0x%x\n", flags);
+
+ if (flags == 0) {
+ cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
+ return -EINVAL;
+ }
+
+ if (flags & ~CIFSSEC_MASK) {
+ cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
+ flags & ~CIFSSEC_MASK);
+ return -EINVAL;
+ }
+
+ cifs_security_flags_handle_must_flags(&flags);
+
+ /* flags look ok - update the global security flags for cifs module */
+ global_secflags = flags;
+ if (global_secflags & CIFSSEC_MUST_SIGN) {
+ /* requiring signing implies signing is allowed */
+ global_secflags |= CIFSSEC_MAY_SIGN;
+ cifs_dbg(FYI, "packet signing now required\n");
+ } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
+ cifs_dbg(FYI, "packet signing disabled\n");
+ }
+ /* BB should we turn on MAY flags for other MUST options? */
+ return count;
+}
+
+static const struct file_operations cifs_security_flags_proc_fops = {
+ .open = cifs_security_flags_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+ .write = cifs_security_flags_proc_write,
+};
+#else
+inline void cifs_proc_init(void)
+{
+}
+
+inline void cifs_proc_clean(void)
+{
+}
+#endif /* PROC_FS */