/* * 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 #include #include #include #include #include #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->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 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_WEAK_PW_HASH seq_printf(m, " lanman"); #endif #ifdef CONFIG_CIFS_POSIX seq_printf(m, " posix"); #endif #ifdef CONFIG_CIFS_UPCALL seq_printf(m, " 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"); 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_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 int cifs_debug_data_proc_open(struct inode *inode, struct file *file) { return single_open(file, cifs_debug_data_proc_show, NULL); } static const struct file_operations cifs_debug_data_proc_fops = { .open = cifs_debug_data_proc_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, }; #ifdef CONFIG_CIFS_STATS 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 atomic_set(&totBufAllocCount, 0); atomic_set(&totSmBufAllocCount, 0); #endif /* CONFIG_CIFS_STATS2 */ 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); 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); 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; 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); 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, }; #endif /* STATS */ #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("DebugData", 0, proc_fs_cifs, &cifs_debug_data_proc_fops); #ifdef CONFIG_CIFS_STATS proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_fops); #endif /* STATS */ 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); #ifdef CONFIG_CIFS_STATS remove_proc_entry("Stats", proc_fs_cifs); #endif 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 */