| /* |
| * fs/cifs/smb2pdu.c |
| * |
| * Copyright (C) International Business Machines Corp., 2009, 2013 |
| * Etersoft, 2012 |
| * Author(s): Steve French (sfrench@us.ibm.com) |
| * Pavel Shilovsky (pshilovsky@samba.org) 2012 |
| * |
| * Contains the routines for constructing the SMB2 PDUs themselves |
| * |
| * This library is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU Lesser General Public License as published |
| * by the Free Software Foundation; either version 2.1 of the License, or |
| * (at your option) any later version. |
| * |
| * This library 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 Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public License |
| * along with this library; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| |
| /* SMB2 PDU handling routines here - except for leftovers (eg session setup) */ |
| /* Note that there are handle based routines which must be */ |
| /* treated slightly differently for reconnection purposes since we never */ |
| /* want to reuse a stale file handle and only the caller knows the file info */ |
| |
| #include <linux/fs.h> |
| #include <linux/kernel.h> |
| #include <linux/vfs.h> |
| #include <linux/task_io_accounting_ops.h> |
| #include <linux/uaccess.h> |
| #include <linux/uuid.h> |
| #include <linux/pagemap.h> |
| #include <linux/xattr.h> |
| #include "smb2pdu.h" |
| #include "cifsglob.h" |
| #include "cifsacl.h" |
| #include "cifsproto.h" |
| #include "smb2proto.h" |
| #include "cifs_unicode.h" |
| #include "cifs_debug.h" |
| #include "ntlmssp.h" |
| #include "smb2status.h" |
| #include "smb2glob.h" |
| #include "cifspdu.h" |
| #include "cifs_spnego.h" |
| #include "smbdirect.h" |
| #include "trace.h" |
| #ifdef CONFIG_CIFS_DFS_UPCALL |
| #include "dfs_cache.h" |
| #endif |
| |
| /* |
| * The following table defines the expected "StructureSize" of SMB2 requests |
| * in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests. |
| * |
| * Note that commands are defined in smb2pdu.h in le16 but the array below is |
| * indexed by command in host byte order. |
| */ |
| static const int smb2_req_struct_sizes[NUMBER_OF_SMB2_COMMANDS] = { |
| /* SMB2_NEGOTIATE */ 36, |
| /* SMB2_SESSION_SETUP */ 25, |
| /* SMB2_LOGOFF */ 4, |
| /* SMB2_TREE_CONNECT */ 9, |
| /* SMB2_TREE_DISCONNECT */ 4, |
| /* SMB2_CREATE */ 57, |
| /* SMB2_CLOSE */ 24, |
| /* SMB2_FLUSH */ 24, |
| /* SMB2_READ */ 49, |
| /* SMB2_WRITE */ 49, |
| /* SMB2_LOCK */ 48, |
| /* SMB2_IOCTL */ 57, |
| /* SMB2_CANCEL */ 4, |
| /* SMB2_ECHO */ 4, |
| /* SMB2_QUERY_DIRECTORY */ 33, |
| /* SMB2_CHANGE_NOTIFY */ 32, |
| /* SMB2_QUERY_INFO */ 41, |
| /* SMB2_SET_INFO */ 33, |
| /* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */ |
| }; |
| |
| int smb3_encryption_required(const struct cifs_tcon *tcon) |
| { |
| if (!tcon) |
| return 0; |
| if ((tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) || |
| (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA)) |
| return 1; |
| if (tcon->seal && |
| (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION)) |
| return 1; |
| return 0; |
| } |
| |
| static void |
| smb2_hdr_assemble(struct smb2_sync_hdr *shdr, __le16 smb2_cmd, |
| const struct cifs_tcon *tcon) |
| { |
| shdr->ProtocolId = SMB2_PROTO_NUMBER; |
| shdr->StructureSize = cpu_to_le16(64); |
| shdr->Command = smb2_cmd; |
| if (tcon && tcon->ses && tcon->ses->server) { |
| struct TCP_Server_Info *server = tcon->ses->server; |
| |
| spin_lock(&server->req_lock); |
| /* Request up to 2 credits but don't go over the limit. */ |
| if (server->credits >= server->max_credits) |
| shdr->CreditRequest = cpu_to_le16(0); |
| else |
| shdr->CreditRequest = cpu_to_le16( |
| min_t(int, server->max_credits - |
| server->credits, 2)); |
| spin_unlock(&server->req_lock); |
| } else { |
| shdr->CreditRequest = cpu_to_le16(2); |
| } |
| shdr->ProcessId = cpu_to_le32((__u16)current->tgid); |
| |
| if (!tcon) |
| goto out; |
| |
| /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */ |
| /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */ |
| if ((tcon->ses) && (tcon->ses->server) && |
| (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) |
| shdr->CreditCharge = cpu_to_le16(1); |
| /* else CreditCharge MBZ */ |
| |
| shdr->TreeId = tcon->tid; |
| /* Uid is not converted */ |
| if (tcon->ses) |
| shdr->SessionId = tcon->ses->Suid; |
| |
| /* |
| * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have |
| * to pass the path on the Open SMB prefixed by \\server\share. |
| * Not sure when we would need to do the augmented path (if ever) and |
| * setting this flag breaks the SMB2 open operation since it is |
| * illegal to send an empty path name (without \\server\share prefix) |
| * when the DFS flag is set in the SMB open header. We could |
| * consider setting the flag on all operations other than open |
| * but it is safer to net set it for now. |
| */ |
| /* if (tcon->share_flags & SHI1005_FLAGS_DFS) |
| shdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */ |
| |
| if (tcon->ses && tcon->ses->server && tcon->ses->server->sign && |
| !smb3_encryption_required(tcon)) |
| shdr->Flags |= SMB2_FLAGS_SIGNED; |
| out: |
| return; |
| } |
| |
| #ifdef CONFIG_CIFS_DFS_UPCALL |
| static int __smb2_reconnect(const struct nls_table *nlsc, |
| struct cifs_tcon *tcon) |
| { |
| int rc; |
| struct dfs_cache_tgt_list tl; |
| struct dfs_cache_tgt_iterator *it = NULL; |
| char tree[MAX_TREE_SIZE + 1]; |
| const char *tcp_host; |
| size_t tcp_host_len; |
| const char *dfs_host; |
| size_t dfs_host_len; |
| |
| if (tcon->ipc) { |
| snprintf(tree, sizeof(tree), "\\\\%s\\IPC$", |
| tcon->ses->server->hostname); |
| return SMB2_tcon(0, tcon->ses, tree, tcon, nlsc); |
| } |
| |
| if (!tcon->dfs_path) |
| return SMB2_tcon(0, tcon->ses, tcon->treeName, tcon, nlsc); |
| |
| rc = dfs_cache_noreq_find(tcon->dfs_path + 1, NULL, &tl); |
| if (rc) |
| return rc; |
| |
| extract_unc_hostname(tcon->ses->server->hostname, &tcp_host, |
| &tcp_host_len); |
| |
| for (it = dfs_cache_get_tgt_iterator(&tl); it; |
| it = dfs_cache_get_next_tgt(&tl, it)) { |
| const char *tgt = dfs_cache_get_tgt_name(it); |
| |
| extract_unc_hostname(tgt, &dfs_host, &dfs_host_len); |
| |
| if (dfs_host_len != tcp_host_len |
| || strncasecmp(dfs_host, tcp_host, dfs_host_len) != 0) { |
| cifs_dbg(FYI, "%s: skipping %.*s, doesn't match %.*s", |
| __func__, |
| (int)dfs_host_len, dfs_host, |
| (int)tcp_host_len, tcp_host); |
| continue; |
| } |
| |
| snprintf(tree, sizeof(tree), "\\%s", tgt); |
| |
| rc = SMB2_tcon(0, tcon->ses, tree, tcon, nlsc); |
| if (!rc) |
| break; |
| if (rc == -EREMOTE) |
| break; |
| } |
| |
| if (!rc) { |
| if (it) |
| rc = dfs_cache_noreq_update_tgthint(tcon->dfs_path + 1, |
| it); |
| else |
| rc = -ENOENT; |
| } |
| dfs_cache_free_tgts(&tl); |
| return rc; |
| } |
| #else |
| static inline int __smb2_reconnect(const struct nls_table *nlsc, |
| struct cifs_tcon *tcon) |
| { |
| return SMB2_tcon(0, tcon->ses, tcon->treeName, tcon, nlsc); |
| } |
| #endif |
| |
| static int |
| smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon) |
| { |
| int rc; |
| struct nls_table *nls_codepage; |
| struct cifs_ses *ses; |
| struct TCP_Server_Info *server; |
| int retries; |
| |
| /* |
| * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so |
| * check for tcp and smb session status done differently |
| * for those three - in the calling routine. |
| */ |
| if (tcon == NULL) |
| return 0; |
| |
| if (smb2_command == SMB2_TREE_CONNECT) |
| return 0; |
| |
| if (tcon->tidStatus == CifsExiting) { |
| /* |
| * only tree disconnect, open, and write, |
| * (and ulogoff which does not have tcon) |
| * are allowed as we start force umount. |
| */ |
| if ((smb2_command != SMB2_WRITE) && |
| (smb2_command != SMB2_CREATE) && |
| (smb2_command != SMB2_TREE_DISCONNECT)) { |
| cifs_dbg(FYI, "can not send cmd %d while umounting\n", |
| smb2_command); |
| return -ENODEV; |
| } |
| } |
| if ((!tcon->ses) || (tcon->ses->status == CifsExiting) || |
| (!tcon->ses->server)) |
| return -EIO; |
| |
| ses = tcon->ses; |
| server = ses->server; |
| |
| retries = server->nr_targets; |
| |
| /* |
| * Give demultiplex thread up to 10 seconds to each target available for |
| * reconnect -- should be greater than cifs socket timeout which is 7 |
| * seconds. |
| */ |
| while (server->tcpStatus == CifsNeedReconnect) { |
| /* |
| * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE |
| * here since they are implicitly done when session drops. |
| */ |
| switch (smb2_command) { |
| /* |
| * BB Should we keep oplock break and add flush to exceptions? |
| */ |
| case SMB2_TREE_DISCONNECT: |
| case SMB2_CANCEL: |
| case SMB2_CLOSE: |
| case SMB2_OPLOCK_BREAK: |
| return -EAGAIN; |
| } |
| |
| rc = wait_event_interruptible_timeout(server->response_q, |
| (server->tcpStatus != CifsNeedReconnect), |
| 10 * HZ); |
| if (rc < 0) { |
| cifs_dbg(FYI, "%s: aborting reconnect due to a received" |
| " signal by the process\n", __func__); |
| return -ERESTARTSYS; |
| } |
| |
| /* are we still trying to reconnect? */ |
| if (server->tcpStatus != CifsNeedReconnect) |
| break; |
| |
| if (--retries) |
| continue; |
| |
| /* |
| * on "soft" mounts we wait once. Hard mounts keep |
| * retrying until process is killed or server comes |
| * back on-line |
| */ |
| if (!tcon->retry) { |
| cifs_dbg(FYI, "gave up waiting on reconnect in smb_init\n"); |
| return -EHOSTDOWN; |
| } |
| retries = server->nr_targets; |
| } |
| |
| if (!tcon->ses->need_reconnect && !tcon->need_reconnect) |
| return 0; |
| |
| nls_codepage = load_nls_default(); |
| |
| /* |
| * need to prevent multiple threads trying to simultaneously reconnect |
| * the same SMB session |
| */ |
| mutex_lock(&tcon->ses->session_mutex); |
| |
| /* |
| * Recheck after acquire mutex. If another thread is negotiating |
| * and the server never sends an answer the socket will be closed |
| * and tcpStatus set to reconnect. |
| */ |
| if (server->tcpStatus == CifsNeedReconnect) { |
| rc = -EHOSTDOWN; |
| mutex_unlock(&tcon->ses->session_mutex); |
| goto out; |
| } |
| |
| rc = cifs_negotiate_protocol(0, tcon->ses); |
| if (!rc && tcon->ses->need_reconnect) |
| rc = cifs_setup_session(0, tcon->ses, nls_codepage); |
| |
| if (rc || !tcon->need_reconnect) { |
| mutex_unlock(&tcon->ses->session_mutex); |
| goto out; |
| } |
| |
| cifs_mark_open_files_invalid(tcon); |
| if (tcon->use_persistent) |
| tcon->need_reopen_files = true; |
| |
| rc = __smb2_reconnect(nls_codepage, tcon); |
| mutex_unlock(&tcon->ses->session_mutex); |
| |
| cifs_dbg(FYI, "reconnect tcon rc = %d\n", rc); |
| if (rc) { |
| /* If sess reconnected but tcon didn't, something strange ... */ |
| printk_once(KERN_WARNING "reconnect tcon failed rc = %d\n", rc); |
| goto out; |
| } |
| |
| if (smb2_command != SMB2_INTERNAL_CMD) |
| queue_delayed_work(cifsiod_wq, &server->reconnect, 0); |
| |
| atomic_inc(&tconInfoReconnectCount); |
| out: |
| /* |
| * Check if handle based operation so we know whether we can continue |
| * or not without returning to caller to reset file handle. |
| */ |
| /* |
| * BB Is flush done by server on drop of tcp session? Should we special |
| * case it and skip above? |
| */ |
| switch (smb2_command) { |
| case SMB2_FLUSH: |
| case SMB2_READ: |
| case SMB2_WRITE: |
| case SMB2_LOCK: |
| case SMB2_IOCTL: |
| case SMB2_QUERY_DIRECTORY: |
| case SMB2_CHANGE_NOTIFY: |
| case SMB2_QUERY_INFO: |
| case SMB2_SET_INFO: |
| rc = -EAGAIN; |
| } |
| unload_nls(nls_codepage); |
| return rc; |
| } |
| |
| static void |
| fill_small_buf(__le16 smb2_command, struct cifs_tcon *tcon, void *buf, |
| unsigned int *total_len) |
| { |
| struct smb2_sync_pdu *spdu = (struct smb2_sync_pdu *)buf; |
| /* lookup word count ie StructureSize from table */ |
| __u16 parmsize = smb2_req_struct_sizes[le16_to_cpu(smb2_command)]; |
| |
| /* |
| * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of |
| * largest operations (Create) |
| */ |
| memset(buf, 0, 256); |
| |
| smb2_hdr_assemble(&spdu->sync_hdr, smb2_command, tcon); |
| spdu->StructureSize2 = cpu_to_le16(parmsize); |
| |
| *total_len = parmsize + sizeof(struct smb2_sync_hdr); |
| } |
| |
| /* |
| * Allocate and return pointer to an SMB request hdr, and set basic |
| * SMB information in the SMB header. If the return code is zero, this |
| * function must have filled in request_buf pointer. |
| */ |
| static int |
| smb2_plain_req_init(__le16 smb2_command, struct cifs_tcon *tcon, |
| void **request_buf, unsigned int *total_len) |
| { |
| int rc; |
| |
| rc = smb2_reconnect(smb2_command, tcon); |
| if (rc) |
| return rc; |
| |
| /* BB eventually switch this to SMB2 specific small buf size */ |
| if (smb2_command == SMB2_SET_INFO) |
| *request_buf = cifs_buf_get(); |
| else |
| *request_buf = cifs_small_buf_get(); |
| if (*request_buf == NULL) { |
| /* BB should we add a retry in here if not a writepage? */ |
| return -ENOMEM; |
| } |
| |
| fill_small_buf(smb2_command, tcon, |
| (struct smb2_sync_hdr *)(*request_buf), |
| total_len); |
| |
| if (tcon != NULL) { |
| uint16_t com_code = le16_to_cpu(smb2_command); |
| cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]); |
| cifs_stats_inc(&tcon->num_smbs_sent); |
| } |
| |
| return rc; |
| } |
| |
| |
| #define SMB2_PREAUTH_INTEGRITY_CAPABILITIES cpu_to_le16(1) |
| #define SMB2_ENCRYPTION_CAPABILITIES cpu_to_le16(2) |
| #define SMB2_POSIX_EXTENSIONS_AVAILABLE cpu_to_le16(0x100) |
| |
| static void |
| build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt) |
| { |
| pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES; |
| pneg_ctxt->DataLength = cpu_to_le16(38); |
| pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1); |
| pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE); |
| get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE); |
| pneg_ctxt->HashAlgorithms = SMB2_PREAUTH_INTEGRITY_SHA512; |
| } |
| |
| static void |
| build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt) |
| { |
| pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES; |
| pneg_ctxt->DataLength = cpu_to_le16(4); /* Cipher Count + le16 cipher */ |
| pneg_ctxt->CipherCount = cpu_to_le16(1); |
| /* pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM;*/ /* not supported yet */ |
| pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_CCM; |
| } |
| |
| static void |
| build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt) |
| { |
| pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE; |
| pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN); |
| } |
| |
| static void |
| assemble_neg_contexts(struct smb2_negotiate_req *req, |
| unsigned int *total_len) |
| { |
| char *pneg_ctxt = (char *)req; |
| unsigned int ctxt_len; |
| |
| if (*total_len > 200) { |
| /* In case length corrupted don't want to overrun smb buffer */ |
| cifs_dbg(VFS, "Bad frame length assembling neg contexts\n"); |
| return; |
| } |
| |
| /* |
| * round up total_len of fixed part of SMB3 negotiate request to 8 |
| * byte boundary before adding negotiate contexts |
| */ |
| *total_len = roundup(*total_len, 8); |
| |
| pneg_ctxt = (*total_len) + (char *)req; |
| req->NegotiateContextOffset = cpu_to_le32(*total_len); |
| |
| build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt); |
| ctxt_len = DIV_ROUND_UP(sizeof(struct smb2_preauth_neg_context), 8) * 8; |
| *total_len += ctxt_len; |
| pneg_ctxt += ctxt_len; |
| |
| build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt); |
| ctxt_len = DIV_ROUND_UP(sizeof(struct smb2_encryption_neg_context), 8) * 8; |
| *total_len += ctxt_len; |
| pneg_ctxt += ctxt_len; |
| |
| build_posix_ctxt((struct smb2_posix_neg_context *)pneg_ctxt); |
| *total_len += sizeof(struct smb2_posix_neg_context); |
| |
| req->NegotiateContextCount = cpu_to_le16(3); |
| } |
| |
| static void decode_preauth_context(struct smb2_preauth_neg_context *ctxt) |
| { |
| unsigned int len = le16_to_cpu(ctxt->DataLength); |
| |
| /* If invalid preauth context warn but use what we requested, SHA-512 */ |
| if (len < MIN_PREAUTH_CTXT_DATA_LEN) { |
| printk_once(KERN_WARNING "server sent bad preauth context\n"); |
| return; |
| } |
| if (le16_to_cpu(ctxt->HashAlgorithmCount) != 1) |
| printk_once(KERN_WARNING "illegal SMB3 hash algorithm count\n"); |
| if (ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512) |
| printk_once(KERN_WARNING "unknown SMB3 hash algorithm\n"); |
| } |
| |
| static int decode_encrypt_ctx(struct TCP_Server_Info *server, |
| struct smb2_encryption_neg_context *ctxt) |
| { |
| unsigned int len = le16_to_cpu(ctxt->DataLength); |
| |
| cifs_dbg(FYI, "decode SMB3.11 encryption neg context of len %d\n", len); |
| if (len < MIN_ENCRYPT_CTXT_DATA_LEN) { |
| printk_once(KERN_WARNING "server sent bad crypto ctxt len\n"); |
| return -EINVAL; |
| } |
| |
| if (le16_to_cpu(ctxt->CipherCount) != 1) { |
| printk_once(KERN_WARNING "illegal SMB3.11 cipher count\n"); |
| return -EINVAL; |
| } |
| cifs_dbg(FYI, "SMB311 cipher type:%d\n", le16_to_cpu(ctxt->Ciphers[0])); |
| if ((ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES128_CCM) && |
| (ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES128_GCM)) { |
| printk_once(KERN_WARNING "invalid SMB3.11 cipher returned\n"); |
| return -EINVAL; |
| } |
| server->cipher_type = ctxt->Ciphers[0]; |
| server->capabilities |= SMB2_GLOBAL_CAP_ENCRYPTION; |
| return 0; |
| } |
| |
| static int smb311_decode_neg_context(struct smb2_negotiate_rsp *rsp, |
| struct TCP_Server_Info *server, |
| unsigned int len_of_smb) |
| { |
| struct smb2_neg_context *pctx; |
| unsigned int offset = le32_to_cpu(rsp->NegotiateContextOffset); |
| unsigned int ctxt_cnt = le16_to_cpu(rsp->NegotiateContextCount); |
| unsigned int len_of_ctxts, i; |
| int rc = 0; |
| |
| cifs_dbg(FYI, "decoding %d negotiate contexts\n", ctxt_cnt); |
| if (len_of_smb <= offset) { |
| cifs_dbg(VFS, "Invalid response: negotiate context offset\n"); |
| return -EINVAL; |
| } |
| |
| len_of_ctxts = len_of_smb - offset; |
| |
| for (i = 0; i < ctxt_cnt; i++) { |
| int clen; |
| /* check that offset is not beyond end of SMB */ |
| if (len_of_ctxts == 0) |
| break; |
| |
| if (len_of_ctxts < sizeof(struct smb2_neg_context)) |
| break; |
| |
| pctx = (struct smb2_neg_context *)(offset + (char *)rsp); |
| clen = le16_to_cpu(pctx->DataLength); |
| if (clen > len_of_ctxts) |
| break; |
| |
| if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES) |
| decode_preauth_context( |
| (struct smb2_preauth_neg_context *)pctx); |
| else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES) |
| rc = decode_encrypt_ctx(server, |
| (struct smb2_encryption_neg_context *)pctx); |
| else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) |
| server->posix_ext_supported = true; |
| else |
| cifs_dbg(VFS, "unknown negcontext of type %d ignored\n", |
| le16_to_cpu(pctx->ContextType)); |
| |
| if (rc) |
| break; |
| /* offsets must be 8 byte aligned */ |
| clen = (clen + 7) & ~0x7; |
| offset += clen + sizeof(struct smb2_neg_context); |
| len_of_ctxts -= clen; |
| } |
| return rc; |
| } |
| |
| static struct create_posix * |
| create_posix_buf(umode_t mode) |
| { |
| struct create_posix *buf; |
| |
| buf = kzalloc(sizeof(struct create_posix), |
| GFP_KERNEL); |
| if (!buf) |
| return NULL; |
| |
| buf->ccontext.DataOffset = |
| cpu_to_le16(offsetof(struct create_posix, Mode)); |
| buf->ccontext.DataLength = cpu_to_le32(4); |
| buf->ccontext.NameOffset = |
| cpu_to_le16(offsetof(struct create_posix, Name)); |
| buf->ccontext.NameLength = cpu_to_le16(16); |
| |
| /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */ |
| buf->Name[0] = 0x93; |
| buf->Name[1] = 0xAD; |
| buf->Name[2] = 0x25; |
| buf->Name[3] = 0x50; |
| buf->Name[4] = 0x9C; |
| buf->Name[5] = 0xB4; |
| buf->Name[6] = 0x11; |
| buf->Name[7] = 0xE7; |
| buf->Name[8] = 0xB4; |
| buf->Name[9] = 0x23; |
| buf->Name[10] = 0x83; |
| buf->Name[11] = 0xDE; |
| buf->Name[12] = 0x96; |
| buf->Name[13] = 0x8B; |
| buf->Name[14] = 0xCD; |
| buf->Name[15] = 0x7C; |
| buf->Mode = cpu_to_le32(mode); |
| cifs_dbg(FYI, "mode on posix create 0%o", mode); |
| return buf; |
| } |
| |
| static int |
| add_posix_context(struct kvec *iov, unsigned int *num_iovec, umode_t mode) |
| { |
| struct smb2_create_req *req = iov[0].iov_base; |
| unsigned int num = *num_iovec; |
| |
| iov[num].iov_base = create_posix_buf(mode); |
| if (iov[num].iov_base == NULL) |
| return -ENOMEM; |
| iov[num].iov_len = sizeof(struct create_posix); |
| if (!req->CreateContextsOffset) |
| req->CreateContextsOffset = cpu_to_le32( |
| sizeof(struct smb2_create_req) + |
| iov[num - 1].iov_len); |
| le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_posix)); |
| *num_iovec = num + 1; |
| return 0; |
| } |
| |
| |
| /* |
| * |
| * SMB2 Worker functions follow: |
| * |
| * The general structure of the worker functions is: |
| * 1) Call smb2_init (assembles SMB2 header) |
| * 2) Initialize SMB2 command specific fields in fixed length area of SMB |
| * 3) Call smb_sendrcv2 (sends request on socket and waits for response) |
| * 4) Decode SMB2 command specific fields in the fixed length area |
| * 5) Decode variable length data area (if any for this SMB2 command type) |
| * 6) Call free smb buffer |
| * 7) return |
| * |
| */ |
| |
| int |
| SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses) |
| { |
| struct smb_rqst rqst; |
| struct smb2_negotiate_req *req; |
| struct smb2_negotiate_rsp *rsp; |
| struct kvec iov[1]; |
| struct kvec rsp_iov; |
| int rc = 0; |
| int resp_buftype; |
| struct TCP_Server_Info *server = ses->server; |
| int blob_offset, blob_length; |
| char *security_blob; |
| int flags = CIFS_NEG_OP; |
| unsigned int total_len; |
| |
| cifs_dbg(FYI, "Negotiate protocol\n"); |
| |
| if (!server) { |
| WARN(1, "%s: server is NULL!\n", __func__); |
| return -EIO; |
| } |
| |
| rc = smb2_plain_req_init(SMB2_NEGOTIATE, NULL, (void **) &req, &total_len); |
| if (rc) |
| return rc; |
| |
| req->sync_hdr.SessionId = 0; |
| |
| memset(server->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE); |
| memset(ses->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE); |
| |
| if (strcmp(ses->server->vals->version_string, |
| SMB3ANY_VERSION_STRING) == 0) { |
| req->Dialects[0] = cpu_to_le16(SMB30_PROT_ID); |
| req->Dialects[1] = cpu_to_le16(SMB302_PROT_ID); |
| req->DialectCount = cpu_to_le16(2); |
| total_len += 4; |
| } else if (strcmp(ses->server->vals->version_string, |
| SMBDEFAULT_VERSION_STRING) == 0) { |
| req->Dialects[0] = cpu_to_le16(SMB21_PROT_ID); |
| req->Dialects[1] = cpu_to_le16(SMB30_PROT_ID); |
| req->Dialects[2] = cpu_to_le16(SMB302_PROT_ID); |
| req->Dialects[3] = cpu_to_le16(SMB311_PROT_ID); |
| req->DialectCount = cpu_to_le16(4); |
| total_len += 8; |
| } else { |
| /* otherwise send specific dialect */ |
| req->Dialects[0] = cpu_to_le16(ses->server->vals->protocol_id); |
| req->DialectCount = cpu_to_le16(1); |
| total_len += 2; |
| } |
| |
| /* only one of SMB2 signing flags may be set in SMB2 request */ |
| if (ses->sign) |
| req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED); |
| else if (global_secflags & CIFSSEC_MAY_SIGN) |
| req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED); |
| else |
| req->SecurityMode = 0; |
| |
| req->Capabilities = cpu_to_le32(ses->server->vals->req_capabilities); |
| |
| /* ClientGUID must be zero for SMB2.02 dialect */ |
| if (ses->server->vals->protocol_id == SMB20_PROT_ID) |
| memset(req->ClientGUID, 0, SMB2_CLIENT_GUID_SIZE); |
| else { |
| memcpy(req->ClientGUID, server->client_guid, |
| SMB2_CLIENT_GUID_SIZE); |
| if ((ses->server->vals->protocol_id == SMB311_PROT_ID) || |
| (strcmp(ses->server->vals->version_string, |
| SMBDEFAULT_VERSION_STRING) == 0)) |
| assemble_neg_contexts(req, &total_len); |
| } |
| iov[0].iov_base = (char *)req; |
| iov[0].iov_len = total_len; |
| |
| memset(&rqst, 0, sizeof(struct smb_rqst)); |
| rqst.rq_iov = iov; |
| rqst.rq_nvec = 1; |
| |
| rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov); |
| cifs_small_buf_release(req); |
| rsp = (struct smb2_negotiate_rsp *)rsp_iov.iov_base; |
| /* |
| * No tcon so can't do |
| * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]); |
| */ |
| if (rc == -EOPNOTSUPP) { |
| cifs_dbg(VFS, "Dialect not supported by server. Consider " |
| "specifying vers=1.0 or vers=2.0 on mount for accessing" |
| " older servers\n"); |
| goto neg_exit; |
| } else if (rc != 0) |
| goto neg_exit; |
| |
| if (strcmp(ses->server->vals->version_string, |
| SMB3ANY_VERSION_STRING) == 0) { |
| if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) { |
| cifs_dbg(VFS, |
| "SMB2 dialect returned but not requested\n"); |
| return -EIO; |
| } else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) { |
| cifs_dbg(VFS, |
| "SMB2.1 dialect returned but not requested\n"); |
| return -EIO; |
| } |
| } else if (strcmp(ses->server->vals->version_string, |
| SMBDEFAULT_VERSION_STRING) == 0) { |
| if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) { |
| cifs_dbg(VFS, |
| "SMB2 dialect returned but not requested\n"); |
| return -EIO; |
| } else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) { |
| /* ops set to 3.0 by default for default so update */ |
| ses->server->ops = &smb21_operations; |
| } else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) |
| ses->server->ops = &smb311_operations; |
| } else if (le16_to_cpu(rsp->DialectRevision) != |
| ses->server->vals->protocol_id) { |
| /* if requested single dialect ensure returned dialect matched */ |
| cifs_dbg(VFS, "Illegal 0x%x dialect returned: not requested\n", |
| le16_to_cpu(rsp->DialectRevision)); |
| return -EIO; |
| } |
| |
| cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode); |
| |
| if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) |
| cifs_dbg(FYI, "negotiated smb2.0 dialect\n"); |
| else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) |
| cifs_dbg(FYI, "negotiated smb2.1 dialect\n"); |
| else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID)) |
| cifs_dbg(FYI, "negotiated smb3.0 dialect\n"); |
| else if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID)) |
| cifs_dbg(FYI, "negotiated smb3.02 dialect\n"); |
| else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) |
| cifs_dbg(FYI, "negotiated smb3.1.1 dialect\n"); |
| else { |
| cifs_dbg(VFS, "Illegal dialect returned by server 0x%x\n", |
| le16_to_cpu(rsp->DialectRevision)); |
| rc = -EIO; |
| goto neg_exit; |
| } |
| server->dialect = le16_to_cpu(rsp->DialectRevision); |
| |
| /* |
| * Keep a copy of the hash after negprot. This hash will be |
| * the starting hash value for all sessions made from this |
| * server. |
| */ |
| memcpy(server->preauth_sha_hash, ses->preauth_sha_hash, |
| SMB2_PREAUTH_HASH_SIZE); |
| |
| /* SMB2 only has an extended negflavor */ |
| server->negflavor = CIFS_NEGFLAVOR_EXTENDED; |
| /* set it to the maximum buffer size value we can send with 1 credit */ |
| server->maxBuf = min_t(unsigned int, le32_to_cpu(rsp->MaxTransactSize), |
| SMB2_MAX_BUFFER_SIZE); |
| server->max_read = le32_to_cpu(rsp->MaxReadSize); |
| server->max_write = le32_to_cpu(rsp->MaxWriteSize); |
| server->sec_mode = le16_to_cpu(rsp->SecurityMode); |
| if ((server->sec_mode & SMB2_SEC_MODE_FLAGS_ALL) != server->sec_mode) |
| cifs_dbg(FYI, "Server returned unexpected security mode 0x%x\n", |
| server->sec_mode); |
| server->capabilities = le32_to_cpu(rsp->Capabilities); |
| /* Internal types */ |
| server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES; |
| |
| security_blob = smb2_get_data_area_len(&blob_offset, &blob_length, |
| (struct smb2_sync_hdr *)rsp); |
| /* |
| * See MS-SMB2 section 2.2.4: if no blob, client picks default which |
| * for us will be |
| * ses->sectype = RawNTLMSSP; |
| * but for time being this is our only auth choice so doesn't matter. |
| * We just found a server which sets blob length to zero expecting raw. |
| */ |
| if (blob_length == 0) { |
| cifs_dbg(FYI, "missing security blob on negprot\n"); |
| server->sec_ntlmssp = true; |
| } |
| |
| rc = cifs_enable_signing(server, ses->sign); |
| if (rc) |
| goto neg_exit; |
| if (blob_length) { |
| rc = decode_negTokenInit(security_blob, blob_length, server); |
| if (rc == 1) |
| rc = 0; |
| else if (rc == 0) |
| rc = -EIO; |
| } |
| |
| if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) { |
| if (rsp->NegotiateContextCount) |
| rc = smb311_decode_neg_context(rsp, server, |
| rsp_iov.iov_len); |
| else |
| cifs_dbg(VFS, "Missing expected negotiate contexts\n"); |
| } |
| neg_exit: |
| free_rsp_buf(resp_buftype, rsp); |
| return rc; |
| } |
| |
| int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon) |
| { |
| int rc; |
| struct validate_negotiate_info_req *pneg_inbuf; |
| struct validate_negotiate_info_rsp *pneg_rsp = NULL; |
| u32 rsplen; |
| u32 inbuflen; /* max of 4 dialects */ |
| |
| cifs_dbg(FYI, "validate negotiate\n"); |
| |
| /* In SMB3.11 preauth integrity supersedes validate negotiate */ |
| if (tcon->ses->server->dialect == SMB311_PROT_ID) |
| return 0; |
| |
| /* |
| * validation ioctl must be signed, so no point sending this if we |
| * can not sign it (ie are not known user). Even if signing is not |
| * required (enabled but not negotiated), in those cases we selectively |
| * sign just this, the first and only signed request on a connection. |
| * Having validation of negotiate info helps reduce attack vectors. |
| */ |
| if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST) |
| return 0; /* validation requires signing */ |
| |
| if (tcon->ses->user_name == NULL) { |
| cifs_dbg(FYI, "Can't validate negotiate: null user mount\n"); |
| return 0; /* validation requires signing */ |
| } |
| |
| if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_NULL) |
| cifs_dbg(VFS, "Unexpected null user (anonymous) auth flag sent by server\n"); |
| |
| pneg_inbuf = kmalloc(sizeof(*pneg_inbuf), GFP_NOFS); |
| if (!pneg_inbuf) |
| return -ENOMEM; |
| |
| pneg_inbuf->Capabilities = |
| cpu_to_le32(tcon->ses->server->vals->req_capabilities); |
| memcpy(pneg_inbuf->Guid, tcon->ses->server->client_guid, |
| SMB2_CLIENT_GUID_SIZE); |
| |
| if (tcon->ses->sign) |
| pneg_inbuf->SecurityMode = |
| cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED); |
| else if (global_secflags & CIFSSEC_MAY_SIGN) |
| pneg_inbuf->SecurityMode = |
| cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED); |
| else |
| pneg_inbuf->SecurityMode = 0; |
| |
| |
| if (strcmp(tcon->ses->server->vals->version_string, |
| SMB3ANY_VERSION_STRING) == 0) { |
| pneg_inbuf->Dialects[0] = cpu_to_le16(SMB30_PROT_ID); |
| pneg_inbuf->Dialects[1] = cpu_to_le16(SMB302_PROT_ID); |
| pneg_inbuf->DialectCount = cpu_to_le16(2); |
| /* structure is big enough for 3 dialects, sending only 2 */ |
| inbuflen = sizeof(*pneg_inbuf) - |
| (2 * sizeof(pneg_inbuf->Dialects[0])); |
| } else if (strcmp(tcon->ses->server->vals->version_string, |
| SMBDEFAULT_VERSION_STRING) == 0) { |
| pneg_inbuf->Dialects[0] = cpu_to_le16(SMB21_PROT_ID); |
| pneg_inbuf->Dialects[1] = cpu_to_le16(SMB30_PROT_ID); |
| pneg_inbuf->Dialects[2] = cpu_to_le16(SMB302_PROT_ID); |
| pneg_inbuf->Dialects[3] = cpu_to_le16(SMB311_PROT_ID); |
| pneg_inbuf->DialectCount = cpu_to_le16(4); |
| /* structure is big enough for 3 dialects */ |
| inbuflen = sizeof(*pneg_inbuf); |
| } else { |
| /* otherwise specific dialect was requested */ |
| pneg_inbuf->Dialects[0] = |
| cpu_to_le16(tcon->ses->server->vals->protocol_id); |
| pneg_inbuf->DialectCount = cpu_to_le16(1); |
| /* structure is big enough for 3 dialects, sending only 1 */ |
| inbuflen = sizeof(*pneg_inbuf) - |
| sizeof(pneg_inbuf->Dialects[0]) * 2; |
| } |
| |
| rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID, |
| FSCTL_VALIDATE_NEGOTIATE_INFO, true /* is_fsctl */, |
| (char *)pneg_inbuf, inbuflen, (char **)&pneg_rsp, &rsplen); |
| |
| if (rc != 0) { |
| cifs_dbg(VFS, "validate protocol negotiate failed: %d\n", rc); |
| rc = -EIO; |
| goto out_free_inbuf; |
| } |
| |
| rc = -EIO; |
| if (rsplen != sizeof(*pneg_rsp)) { |
| cifs_dbg(VFS, "invalid protocol negotiate response size: %d\n", |
| rsplen); |
| |
| /* relax check since Mac returns max bufsize allowed on ioctl */ |
| if (rsplen > CIFSMaxBufSize || rsplen < sizeof(*pneg_rsp)) |
| goto out_free_rsp; |
| } |
| |
| /* check validate negotiate info response matches what we got earlier */ |
| if (pneg_rsp->Dialect != cpu_to_le16(tcon->ses->server->dialect)) |
| goto vneg_out; |
| |
| if (pneg_rsp->SecurityMode != cpu_to_le16(tcon->ses->server->sec_mode)) |
| goto vneg_out; |
| |
| /* do not validate server guid because not saved at negprot time yet */ |
| |
| if ((le32_to_cpu(pneg_rsp->Capabilities) | SMB2_NT_FIND | |
| SMB2_LARGE_FILES) != tcon->ses->server->capabilities) |
| goto vneg_out; |
| |
| /* validate negotiate successful */ |
| rc = 0; |
| cifs_dbg(FYI, "validate negotiate info successful\n"); |
| goto out_free_rsp; |
| |
| vneg_out: |
| cifs_dbg(VFS, "protocol revalidation - security settings mismatch\n"); |
| out_free_rsp: |
| kfree(pneg_rsp); |
| out_free_inbuf: |
| kfree(pneg_inbuf); |
| return rc; |
| } |
| |
| enum securityEnum |
| smb2_select_sectype(struct TCP_Server_Info *server, enum securityEnum requested) |
| { |
| switch (requested) { |
| case Kerberos: |
| case RawNTLMSSP: |
| return requested; |
| case NTLMv2: |
| return RawNTLMSSP; |
| case Unspecified: |
| if (server->sec_ntlmssp && |
| (global_secflags & CIFSSEC_MAY_NTLMSSP)) |
| return RawNTLMSSP; |
| if ((server->sec_kerberos || server->sec_mskerberos) && |
| (global_secflags & CIFSSEC_MAY_KRB5)) |
| return Kerberos; |
| /* Fallthrough */ |
| default: |
| return Unspecified; |
| } |
| } |
| |
| struct SMB2_sess_data { |
| unsigned int xid; |
| struct cifs_ses *ses; |
| struct nls_table *nls_cp; |
| void (*func)(struct SMB2_sess_data *); |
| int result; |
| u64 previous_session; |
| |
| /* we will send the SMB in three pieces: |
| * a fixed length beginning part, an optional |
| * SPNEGO blob (which can be zero length), and a |
| * last part which will include the strings |
| * and rest of bcc area. This allows us to avoid |
| * a large buffer 17K allocation |
| */ |
| int buf0_type; |
| struct kvec iov[2]; |
| }; |
| |
| static int |
| SMB2_sess_alloc_buffer(struct SMB2_sess_data *sess_data) |
| { |
| int rc; |
| struct cifs_ses *ses = sess_data->ses; |
| struct smb2_sess_setup_req *req; |
| struct TCP_Server_Info *server = ses->server; |
| unsigned int total_len; |
| |
| rc = smb2_plain_req_init(SMB2_SESSION_SETUP, NULL, (void **) &req, |
| &total_len); |
| if (rc) |
| return rc; |
| |
| /* First session, not a reauthenticate */ |
| req->sync_hdr.SessionId = 0; |
| |
| /* if reconnect, we need to send previous sess id, otherwise it is 0 */ |
| req->PreviousSessionId = sess_data->previous_session; |
| |
| req->Flags = 0; /* MBZ */ |
| |
| /* enough to enable echos and oplocks and one max size write */ |
| req->sync_hdr.CreditRequest = cpu_to_le16(130); |
| |
| /* only one of SMB2 signing flags may be set in SMB2 request */ |
| if (server->sign) |
| req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED; |
| else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */ |
| req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED; |
| else |
| req->SecurityMode = 0; |
| |
| req->Capabilities = 0; |
| req->Channel = 0; /* MBZ */ |
| |
| sess_data->iov[0].iov_base = (char *)req; |
| /* 1 for pad */ |
| sess_data->iov[0].iov_len = total_len - 1; |
| /* |
| * This variable will be used to clear the buffer |
| * allocated above in case of any error in the calling function. |
| */ |
| sess_data->buf0_type = CIFS_SMALL_BUFFER; |
| |
| return 0; |
| } |
| |
| static void |
| SMB2_sess_free_buffer(struct SMB2_sess_data *sess_data) |
| { |
| free_rsp_buf(sess_data->buf0_type, sess_data->iov[0].iov_base); |
| sess_data->buf0_type = CIFS_NO_BUFFER; |
| } |
| |
| static int |
| SMB2_sess_sendreceive(struct SMB2_sess_data *sess_data) |
| { |
| int rc; |
| struct smb_rqst rqst; |
| struct smb2_sess_setup_req *req = sess_data->iov[0].iov_base; |
| struct kvec rsp_iov = { NULL, 0 }; |
| |
| /* Testing shows that buffer offset must be at location of Buffer[0] */ |
| req->SecurityBufferOffset = |
| cpu_to_le16(sizeof(struct smb2_sess_setup_req) - 1 /* pad */); |
| req->SecurityBufferLength = cpu_to_le16(sess_data->iov[1].iov_len); |
| |
| memset(&rqst, 0, sizeof(struct smb_rqst)); |
| rqst.rq_iov = sess_data->iov; |
| rqst.rq_nvec = 2; |
| |
| /* BB add code to build os and lm fields */ |
| rc = cifs_send_recv(sess_data->xid, sess_data->ses, |
| &rqst, |
| &sess_data->buf0_type, |
| CIFS_LOG_ERROR | CIFS_NEG_OP, &rsp_iov); |
| cifs_small_buf_release(sess_data->iov[0].iov_base); |
| memcpy(&sess_data->iov[0], &rsp_iov, sizeof(struct kvec)); |
| |
| return rc; |
| } |
| |
| static int |
| SMB2_sess_establish_session(struct SMB2_sess_data *sess_data) |
| { |
| int rc = 0; |
| struct cifs_ses *ses = sess_data->ses; |
| |
| mutex_lock(&ses->server->srv_mutex); |
| if (ses->server->ops->generate_signingkey) { |
| rc = ses->server->ops->generate_signingkey(ses); |
| if (rc) { |
| cifs_dbg(FYI, |
| "SMB3 session key generation failed\n"); |
| mutex_unlock(&ses->server->srv_mutex); |
| return rc; |
| } |
| } |
| if (!ses->server->session_estab) { |
| ses->server->sequence_number = 0x2; |
| ses->server->session_estab = true; |
| } |
| mutex_unlock(&ses->server->srv_mutex); |
| |
| cifs_dbg(FYI, "SMB2/3 session established successfully\n"); |
| spin_lock(&GlobalMid_Lock); |
| ses->status = CifsGood; |
| ses->need_reconnect = false; |
| spin_unlock(&GlobalMid_Lock); |
| return rc; |
| } |
| |
| #ifdef CONFIG_CIFS_UPCALL |
| static void |
| SMB2_auth_kerberos(struct SMB2_sess_data *sess_data) |
| { |
| int rc; |
| struct cifs_ses *ses = sess_data->ses; |
| struct cifs_spnego_msg *msg; |
| struct key *spnego_key = NULL; |
| struct smb2_sess_setup_rsp *rsp = NULL; |
| |
| rc = SMB2_sess_alloc_buffer(sess_data); |
| if (rc) |
| goto out; |
| |
| spnego_key = cifs_get_spnego_key(ses); |
| if (IS_ERR(spnego_key)) { |
| rc = PTR_ERR(spnego_key); |
| spnego_key = NULL; |
| goto out; |
| } |
| |
| msg = spnego_key->payload.data[0]; |
| /* |
| * check version field to make sure that cifs.upcall is |
| * sending us a response in an expected form |
| */ |
| if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) { |
| cifs_dbg(VFS, |
| "bad cifs.upcall version. Expected %d got %d", |
| CIFS_SPNEGO_UPCALL_VERSION, msg->version); |
| rc = -EKEYREJECTED; |
| goto out_put_spnego_key; |
| } |
| |
| ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len, |
| GFP_KERNEL); |
| if (!ses->auth_key.response) { |
| cifs_dbg(VFS, |
| "Kerberos can't allocate (%u bytes) memory", |
| msg->sesskey_len); |
| rc = -ENOMEM; |
| goto out_put_spnego_key; |
| } |
| ses->auth_key.len = msg->sesskey_len; |
| |
| sess_data->iov[1].iov_base = msg->data + msg->sesskey_len; |
| sess_data->iov[1].iov_len = msg->secblob_len; |
| |
| rc = SMB2_sess_sendreceive(sess_data); |
| if (rc) |
| goto out_put_spnego_key; |
| |
| rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base; |
| ses->Suid = rsp->sync_hdr.SessionId; |
| |
| ses->session_flags = le16_to_cpu(rsp->SessionFlags); |
| |
| rc = SMB2_sess_establish_session(sess_data); |
| out_put_spnego_key: |
| key_invalidate(spnego_key); |
| key_put(spnego_key); |
| out: |
| sess_data->result = rc; |
| sess_data->func = NULL; |
| SMB2_sess_free_buffer(sess_data); |
| } |
| #else |
| static void |
| SMB2_auth_kerberos(struct SMB2_sess_data *sess_data) |
| { |
| cifs_dbg(VFS, "Kerberos negotiated but upcall support disabled!\n"); |
| sess_data->result = -EOPNOTSUPP; |
| sess_data->func = NULL; |
| } |
| #endif |
| |
| static void |
| SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data); |
| |
| static void |
| SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data *sess_data) |
| { |
| int rc; |
| struct cifs_ses *ses = sess_data->ses; |
| struct smb2_sess_setup_rsp *rsp = NULL; |
| char *ntlmssp_blob = NULL; |
| bool use_spnego = false; /* else use raw ntlmssp */ |
| u16 blob_length = 0; |
| |
| /* |
| * If memory allocation is successful, caller of this function |
| * frees it. |
| */ |
| ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL); |
| if (!ses->ntlmssp) { |
| rc = -ENOMEM; |
| goto out_err; |
| } |
| ses->ntlmssp->sesskey_per_smbsess = true; |
| |
| rc = SMB2_sess_alloc_buffer(sess_data); |
| if (rc) |
| goto out_err; |
| |
| ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE), |
| GFP_KERNEL); |
| if (ntlmssp_blob == NULL) { |
| rc = -ENOMEM; |
| goto out; |
| } |
| |
| build_ntlmssp_negotiate_blob(ntlmssp_blob, ses); |
| if (use_spnego) { |
| /* BB eventually need to add this */ |
| cifs_dbg(VFS, "spnego not supported for SMB2 yet\n"); |
| rc = -EOPNOTSUPP; |
| goto out; |
| } else { |
| blob_length = sizeof(struct _NEGOTIATE_MESSAGE); |
| /* with raw NTLMSSP we don't encapsulate in SPNEGO */ |
| } |
| sess_data->iov[1].iov_base = ntlmssp_blob; |
| sess_data->iov[1].iov_len = blob_length; |
| |
| rc = SMB2_sess_sendreceive(sess_data); |
| rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base; |
| |
| /* If true, rc here is expected and not an error */ |
| if (sess_data->buf0_type != CIFS_NO_BUFFER && |
| rsp->sync_hdr.Status == STATUS_MORE_PROCESSING_REQUIRED) |
| rc = 0; |
| |
| if (rc) |
| goto out; |
| |
| if (offsetof(struct smb2_sess_setup_rsp, Buffer) != |
| le16_to_cpu(rsp->SecurityBufferOffset)) { |
| cifs_dbg(VFS, "Invalid security buffer offset %d\n", |
| le16_to_cpu(rsp->SecurityBufferOffset)); |
| rc = -EIO; |
| goto out; |
| } |
| rc = decode_ntlmssp_challenge(rsp->Buffer, |
| le16_to_cpu(rsp->SecurityBufferLength), ses); |
| if (rc) |
| goto out; |
| |
| cifs_dbg(FYI, "rawntlmssp session setup challenge phase\n"); |
| |
| |
| ses->Suid = rsp->sync_hdr.SessionId; |
| ses->session_flags = le16_to_cpu(rsp->SessionFlags); |
| |
| out: |
| kfree(ntlmssp_blob); |
| SMB2_sess_free_buffer(sess_data); |
| if (!rc) { |
| sess_data->result = 0; |
| sess_data->func = SMB2_sess_auth_rawntlmssp_authenticate; |
| return; |
| } |
| out_err: |
| kfree(ses->ntlmssp); |
| ses->ntlmssp = NULL; |
| sess_data->result = rc; |
| sess_data->func = NULL; |
| } |
| |
| static void |
| SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data) |
| { |
| int rc; |
| struct cifs_ses *ses = sess_data->ses; |
| struct smb2_sess_setup_req *req; |
| struct smb2_sess_setup_rsp *rsp = NULL; |
| unsigned char *ntlmssp_blob = NULL; |
| bool use_spnego = false; /* else use raw ntlmssp */ |
| u16 blob_length = 0; |
| |
| rc = SMB2_sess_alloc_buffer(sess_data); |
| if (rc) |
| goto out; |
| |
| req = (struct smb2_sess_setup_req *) sess_data->iov[0].iov_base; |
| req->sync_hdr.SessionId = ses->Suid; |
| |
| rc = build_ntlmssp_auth_blob(&ntlmssp_blob, &blob_length, ses, |
| sess_data->nls_cp); |
| if (rc) { |
| cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n", rc); |
| goto out; |
| } |
| |
| if (use_spnego) { |
| /* BB eventually need to add this */ |
| cifs_dbg(VFS, "spnego not supported for SMB2 yet\n"); |
| rc = -EOPNOTSUPP; |
| goto out; |
| } |
| sess_data->iov[1].iov_base = ntlmssp_blob; |
| sess_data->iov[1].iov_len = blob_length; |
| |
| rc = SMB2_sess_sendreceive(sess_data); |
| if (rc) |
| goto out; |
| |
| rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base; |
| |
| ses->Suid = rsp->sync_hdr.SessionId; |
| ses->session_flags = le16_to_cpu(rsp->SessionFlags); |
| |
| rc = SMB2_sess_establish_session(sess_data); |
| out: |
| kfree(ntlmssp_blob); |
| SMB2_sess_free_buffer(sess_data); |
| kfree(ses->ntlmssp); |
| ses->ntlmssp = NULL; |
| sess_data->result = rc; |
| sess_data->func = NULL; |
| } |
| |
| static int |
| SMB2_select_sec(struct cifs_ses *ses, struct SMB2_sess_data *sess_data) |
| { |
| int type; |
| |
| type = smb2_select_sectype(ses->server, ses->sectype); |
| cifs_dbg(FYI, "sess setup type %d\n", type); |
| if (type == Unspecified) { |
| cifs_dbg(VFS, |
| "Unable to select appropriate authentication method!"); |
| return -EINVAL; |
| } |
| |
| switch (type) { |
| case Kerberos: |
| sess_data->func = SMB2_auth_kerberos; |
| break; |
| case RawNTLMSSP: |
| sess_data->func = SMB2_sess_auth_rawntlmssp_negotiate; |
| break; |
| default: |
| cifs_dbg(VFS, "secType %d not supported!\n", type); |
| return -EOPNOTSUPP; |
| } |
| |
| return 0; |
| } |
| |
| int |
| SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses, |
| const struct nls_table *nls_cp) |
| { |
| int rc = 0; |
| struct TCP_Server_Info *server = ses->server; |
| struct SMB2_sess_data *sess_data; |
| |
| cifs_dbg(FYI, "Session Setup\n"); |
| |
| if (!server) { |
| WARN(1, "%s: server is NULL!\n", __func__); |
| return -EIO; |
| } |
| |
| sess_data = kzalloc(sizeof(struct SMB2_sess_data), GFP_KERNEL); |
| if (!sess_data) |
| return -ENOMEM; |
| |
| rc = SMB2_select_sec(ses, sess_data); |
| if (rc) |
| goto out; |
| sess_data->xid = xid; |
| sess_data->ses = ses; |
| sess_data->buf0_type = CIFS_NO_BUFFER; |
| sess_data->nls_cp = (struct nls_table *) nls_cp; |
| sess_data->previous_session = ses->Suid; |
| |
| /* |
| * Initialize the session hash with the server one. |
| */ |
| memcpy(ses->preauth_sha_hash, ses->server->preauth_sha_hash, |
| SMB2_PREAUTH_HASH_SIZE); |
| |
| while (sess_data->func) |
| sess_data->func(sess_data); |
| |
| if ((ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST) && (ses->sign)) |
| cifs_dbg(VFS, "signing requested but authenticated as guest\n"); |
| rc = sess_data->result; |
| out: |
| kfree(sess_data); |
| return rc; |
| } |
| |
| int |
| SMB2_logoff(const unsigned int xid, struct cifs_ses *ses) |
| { |
| struct smb_rqst rqst; |
| struct smb2_logoff_req *req; /* response is also trivial struct */ |
| int rc = 0; |
| struct TCP_Server_Info *server; |
| int flags = 0; |
| unsigned int total_len; |
| struct kvec iov[1]; |
| struct kvec rsp_iov; |
| int resp_buf_type; |
| |
| cifs_dbg(FYI, "disconnect session %p\n", ses); |
| |
| if (ses && (ses->server)) |
| server = ses->server; |
| else |
| return -EIO; |
| |
| /* no need to send SMB logoff if uid already closed due to reconnect */ |
| if (ses->need_reconnect) |
| goto smb2_session_already_dead; |
| |
| rc = smb2_plain_req_init(SMB2_LOGOFF, NULL, (void **) &req, &total_len); |
| if (rc) |
| return rc; |
| |
| /* since no tcon, smb2_init can not do this, so do here */ |
| req->sync_hdr.SessionId = ses->Suid; |
| |
| if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) |
| flags |= CIFS_TRANSFORM_REQ; |
| else if (server->sign) |
| req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED; |
| |
| flags |= CIFS_NO_RESP; |
| |
| iov[0].iov_base = (char *)req; |
| iov[0].iov_len = total_len; |
| |
| memset(&rqst, 0, sizeof(struct smb_rqst)); |
| rqst.rq_iov = iov; |
| rqst.rq_nvec = 1; |
| |
| rc = cifs_send_recv(xid, ses, &rqst, &resp_buf_type, flags, &rsp_iov); |
| cifs_small_buf_release(req); |
| /* |
| * No tcon so can't do |
| * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]); |
| */ |
| |
| smb2_session_already_dead: |
| return rc; |
| } |
| |
| static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code) |
| { |
| cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]); |
| } |
| |
| #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */) |
| |
| /* These are similar values to what Windows uses */ |
| static inline void init_copy_chunk_defaults(struct cifs_tcon *tcon) |
| { |
| tcon->max_chunks = 256; |
| tcon->max_bytes_chunk = 1048576; |
| tcon->max_bytes_copy = 16777216; |
| } |
| |
| int |
| SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree, |
| struct cifs_tcon *tcon, const struct nls_table *cp) |
| { |
| struct smb_rqst rqst; |
| struct smb2_tree_connect_req *req; |
| struct smb2_tree_connect_rsp *rsp = NULL; |
| struct kvec iov[2]; |
| struct kvec rsp_iov = { NULL, 0 }; |
| int rc = 0; |
| int resp_buftype; |
| int unc_path_len; |
| __le16 *unc_path = NULL; |
| int flags = 0; |
| unsigned int total_len; |
| |
| cifs_dbg(FYI, "TCON\n"); |
| |
| if (!(ses->server) || !tree) |
| return -EIO; |
| |
| unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL); |
| if (unc_path == NULL) |
| return -ENOMEM; |
| |
| unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1; |
| unc_path_len *= 2; |
| if (unc_path_len < 2) { |
| kfree(unc_path); |
| return -EINVAL; |
| } |
| |
| /* SMB2 TREE_CONNECT request must be called with TreeId == 0 */ |
| tcon->tid = 0; |
| atomic_set(&tcon->num_remote_opens, 0); |
| rc = smb2_plain_req_init(SMB2_TREE_CONNECT, tcon, (void **) &req, |
| &total_len); |
| if (rc) { |
| kfree(unc_path); |
| return rc; |
| } |
| |
| if (smb3_encryption_required(tcon)) |
| flags |= CIFS_TRANSFORM_REQ; |
| |
| iov[0].iov_base = (char *)req; |
| /* 1 for pad */ |
| iov[0].iov_len = total_len - 1; |
| |
| /* Testing shows that buffer offset must be at location of Buffer[0] */ |
| req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req) |
| - 1 /* pad */); |
| req->PathLength = cpu_to_le16(unc_path_len - 2); |
| iov[1].iov_base = unc_path; |
| iov[1].iov_len = unc_path_len; |
| |
| /* 3.11 tcon req must be signed if not encrypted. See MS-SMB2 3.2.4.1.1 */ |
| if ((ses->server->dialect == SMB311_PROT_ID) && |
| !smb3_encryption_required(tcon)) |
| req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED; |
| |
| memset(&rqst, 0, sizeof(struct smb_rqst)); |
| rqst.rq_iov = iov; |
| rqst.rq_nvec = 2; |
| |
| rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov); |
| cifs_small_buf_release(req); |
| rsp = (struct smb2_tree_connect_rsp *)rsp_iov.iov_base; |
| trace_smb3_tcon(xid, tcon->tid, ses->Suid, tree, rc); |
| if (rc != 0) { |
| if (tcon) { |
| cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE); |
| tcon->need_reconnect = true; |
| } |
| goto tcon_error_exit; |
| } |
| |
| switch (rsp->ShareType) { |
| case SMB2_SHARE_TYPE_DISK: |
| cifs_dbg(FYI, "connection to disk share\n"); |
| break; |
| case SMB2_SHARE_TYPE_PIPE: |
| tcon->pipe = true; |
| cifs_dbg(FYI, "connection to pipe share\n"); |
| break; |
| case SMB2_SHARE_TYPE_PRINT: |
| tcon->print = true; |
| cifs_dbg(FYI, "connection to printer\n"); |
| break; |
| default: |
| cifs_dbg(VFS, "unknown share type %d\n", rsp->ShareType); |
| rc = -EOPNOTSUPP; |
| goto tcon_error_exit; |
| } |
| |
| tcon->share_flags = le32_to_cpu(rsp->ShareFlags); |
| tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */ |
| tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess); |
| tcon->tidStatus = CifsGood; |
| tcon->need_reconnect = false; |
| tcon->tid = rsp->sync_hdr.TreeId; |
| strlcpy(tcon->treeName, tree, sizeof(tcon->treeName)); |
| |
| if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) && |
| ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0)) |
| cifs_dbg(VFS, "DFS capability contradicts DFS flag\n"); |
| |
| if (tcon->seal && |
| !(tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION)) |
| cifs_dbg(VFS, "Encryption is requested but not supported\n"); |
| |
| init_copy_chunk_defaults(tcon); |
| if (tcon->ses->server->ops->validate_negotiate) |
| rc = tcon->ses->server->ops->validate_negotiate(xid, tcon); |
| tcon_exit: |
| |
| free_rsp_buf(resp_buftype, rsp); |
| kfree(unc_path); |
| return rc; |
| |
| tcon_error_exit: |
| if (rsp && rsp->sync_hdr.Status == STATUS_BAD_NETWORK_NAME) { |
| cifs_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree); |
| } |
| goto tcon_exit; |
| } |
| |
| int |
| SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon) |
| { |
| struct smb_rqst rqst; |
| struct smb2_tree_disconnect_req *req; /* response is trivial */ |
| int rc = 0; |
| struct cifs_ses *ses = tcon->ses; |
| int flags = 0; |
| unsigned int total_len; |
| struct kvec iov[1]; |
| struct kvec rsp_iov; |
| int resp_buf_type; |
| |
| cifs_dbg(FYI, "Tree Disconnect\n"); |
| |
| if (!ses || !(ses->server)) |
| return -EIO; |
| |
| if ((tcon->need_reconnect) || (tcon->ses->need_reconnect)) |
| return 0; |
| |
| rc = smb2_plain_req_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req, |
| &total_len); |
| if (rc) |
| return rc; |
| |
| if (smb3_encryption_required(tcon)) |
| flags |= CIFS_TRANSFORM_REQ; |
| |
| flags |= CIFS_NO_RESP; |
| |
| iov[0].iov_base = (char *)req; |
| iov[0].iov_len = total_len; |
| |
| memset(&rqst, 0, sizeof(struct smb_rqst)); |
| rqst.rq_iov = iov; |
| rqst.rq_nvec = 1; |
| |
| rc = cifs_send_recv(xid, ses, &rqst, &resp_buf_type, flags, &rsp_iov); |
| cifs_small_buf_release(req); |
| if (rc) |
| cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE); |
| |
| return rc; |
| } |
| |
| |
| static struct create_durable * |
| create_durable_buf(void) |
| { |
| struct create_durable *buf; |
| |
| buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL); |
| if (!buf) |
| return NULL; |
| |
| buf->ccontext.DataOffset = cpu_to_le16(offsetof |
| (struct create_durable, Data)); |
| buf->ccontext.DataLength = cpu_to_le32(16); |
| buf->ccontext.NameOffset = cpu_to_le16(offsetof |
| (struct create_durable, Name)); |
| buf->ccontext.NameLength = cpu_to_le16(4); |
| /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */ |
| buf->Name[0] = 'D'; |
| buf->Name[1] = 'H'; |
| buf->Name[2] = 'n'; |
| buf->Name[3] = 'Q'; |
| return buf; |
| } |
| |
| static struct create_durable * |
| create_reconnect_durable_buf(struct cifs_fid *fid) |
| { |
| struct create_durable *buf; |
| |
| buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL); |
| if (!buf) |
| return NULL; |
| |
| buf->ccontext.DataOffset = cpu_to_le16(offsetof |
| (struct create_durable, Data)); |
| buf->ccontext.DataLength = cpu_to_le32(16); |
| buf->ccontext.NameOffset = cpu_to_le16(offsetof |
| (struct create_durable, Name)); |
| buf->ccontext.NameLength = cpu_to_le16(4); |
| buf->Data.Fid.PersistentFileId = fid->persistent_fid; |
| buf->Data.Fid.VolatileFileId = fid->volatile_fid; |
| /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */ |
| buf->Name[0] = 'D'; |
| buf->Name[1] = 'H'; |
| buf->Name[2] = 'n'; |
| buf->Name[3] = 'C'; |
| return buf; |
| } |
| |
| static __u8 |
| parse_lease_state(struct TCP_Server_Info *server, struct smb2_create_rsp *rsp, |
| unsigned int *epoch, char *lease_key) |
| { |
| char *data_offset; |
| struct create_context *cc; |
| unsigned int next; |
| unsigned int remaining; |
| char *name; |
| |
| data_offset = (char *)rsp + le32_to_cpu(rsp->CreateContextsOffset); |
| remaining = le32_to_cpu(rsp->CreateContextsLength); |
| cc = (struct create_context *)data_offset; |
| while (remaining >= sizeof(struct create_context)) { |
| name = le16_to_cpu(cc->NameOffset) + (char *)cc; |
| if (le16_to_cpu(cc->NameLength) == 4 && |
| strncmp(name, "RqLs", 4) == 0) |
| return server->ops->parse_lease_buf(cc, epoch, |
| lease_key); |
| |
| next = le32_to_cpu(cc->Next); |
| if (!next) |
| break; |
| remaining -= next; |
| cc = (struct create_context *)((char *)cc + next); |
| } |
| |
| return 0; |
| } |
| |
| static int |
| add_lease_context(struct TCP_Server_Info *server, struct kvec *iov, |
| unsigned int *num_iovec, u8 *lease_key, __u8 *oplock) |
| { |
| struct smb2_create_req *req = iov[0].iov_base; |
| unsigned int num = *num_iovec; |
| |
| iov[num].iov_base = server->ops->create_lease_buf(lease_key, *oplock); |
| if (iov[num].iov_base == NULL) |
| return -ENOMEM; |
| iov[num].iov_len = server->vals->create_lease_size; |
| req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE; |
| if (!req->CreateContextsOffset) |
| req->CreateContextsOffset = cpu_to_le32( |
| sizeof(struct smb2_create_req) + |
| iov[num - 1].iov_len); |
| le32_add_cpu(&req->CreateContextsLength, |
| server->vals->create_lease_size); |
| *num_iovec = num + 1; |
| return 0; |
| } |
| |
| static struct create_durable_v2 * |
| create_durable_v2_buf(struct cifs_fid *pfid) |
| { |
| struct create_durable_v2 *buf; |
| |
| buf = kzalloc(sizeof(struct create_durable_v2), GFP_KERNEL); |
| if (!buf) |
| return NULL; |
| |
| buf->ccontext.DataOffset = cpu_to_le16(offsetof |
| (struct create_durable_v2, dcontext)); |
| buf->ccontext.DataLength = cpu_to_le32(sizeof(struct durable_context_v2)); |
| buf->ccontext.NameOffset = cpu_to_le16(offsetof |
| (struct create_durable_v2, Name)); |
| buf->ccontext.NameLength = cpu_to_le16(4); |
| |
| buf->dcontext.Timeout = 0; /* Should this be configurable by workload */ |
| buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT); |
| generate_random_uuid(buf->dcontext.CreateGuid); |
| memcpy(pfid->create_guid, buf->dcontext.CreateGuid, 16); |
| |
| /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */ |
| buf->Name[0] = 'D'; |
| buf->Name[1] = 'H'; |
| buf->Name[2] = '2'; |
| buf->Name[3] = 'Q'; |
| return buf; |
| } |
| |
| static struct create_durable_handle_reconnect_v2 * |
| create_reconnect_durable_v2_buf(struct cifs_fid *fid) |
| { |
| struct create_durable_handle_reconnect_v2 *buf; |
| |
| buf = kzalloc(sizeof(struct create_durable_handle_reconnect_v2), |
| GFP_KERNEL); |
| if (!buf) |
| return NULL; |
| |
| buf->ccontext.DataOffset = |
| cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2, |
| dcontext)); |
| buf->ccontext.DataLength = |
| cpu_to_le32(sizeof(struct durable_reconnect_context_v2)); |
| buf->ccontext.NameOffset = |
| cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2, |
| Name)); |
| buf->ccontext.NameLength = cpu_to_le16(4); |
| |
| buf->dcontext.Fid.PersistentFileId = fid->persistent_fid; |
| buf->dcontext.Fid.VolatileFileId = fid->volatile_fid; |
| buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT); |
| memcpy(buf->dcontext.CreateGuid, fid->create_guid, 16); |
| |
| /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */ |
| buf->Name[0] = 'D'; |
| buf->Name[1] = 'H'; |
| buf->Name[2] = '2'; |
| buf->Name[3] = 'C'; |
| return buf; |
| } |
| |
| static int |
| add_durable_v2_context(struct kvec *iov, unsigned int *num_iovec, |
| struct cifs_open_parms *oparms) |
| { |
| struct smb2_create_req *req = iov[0].iov_base; |
| unsigned int num = *num_iovec; |
| |
| iov[num].iov_base = create_durable_v2_buf(oparms->fid); |
| if (iov[num].iov_base == NULL) |
| return -ENOMEM; |
| iov[num].iov_len = sizeof(struct create_durable_v2); |
| if (!req->CreateContextsOffset) |
| req->CreateContextsOffset = |
| cpu_to_le32(sizeof(struct smb2_create_req) + |
| iov[1].iov_len); |
| le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable_v2)); |
| *num_iovec = num + 1; |
| return 0; |
| } |
| |
| static int |
| add_durable_reconnect_v2_context(struct kvec *iov, unsigned int *num_iovec, |
| struct cifs_open_parms *oparms) |
| { |
| struct smb2_create_req *req = iov[0].iov_base; |
| unsigned int num = *num_iovec; |
| |
| /* indicate that we don't need to relock the file */ |
| oparms->reconnect = false; |
| |
| iov[num].iov_base = create_reconnect_durable_v2_buf(oparms->fid); |
| if (iov[num].iov_base == NULL) |
| return -ENOMEM; |
| iov[num].iov_len = sizeof(struct create_durable_handle_reconnect_v2); |
| if (!req->CreateContextsOffset) |
| req->CreateContextsOffset = |
| cpu_to_le32(sizeof(struct smb2_create_req) + |
| iov[1].iov_len); |
| le32_add_cpu(&req->CreateContextsLength, |
| sizeof(struct create_durable_handle_reconnect_v2)); |
| *num_iovec = num + 1; |
| return 0; |
| } |
| |
| static int |
| add_durable_context(struct kvec *iov, unsigned int *num_iovec, |
| struct cifs_open_parms *oparms, bool use_persistent) |
| { |
| struct smb2_create_req *req = iov[0].iov_base; |
| unsigned int num = *num_iovec; |
| |
| if (use_persistent) { |
| if (oparms->reconnect) |
| return add_durable_reconnect_v2_context(iov, num_iovec, |
| oparms); |
| else |
| return add_durable_v2_context(iov, num_iovec, oparms); |
| } |
| |
| if (oparms->reconnect) { |
| iov[num].iov_base = create_reconnect_durable_buf(oparms->fid); |
| /* indicate that we don't need to relock the file */ |
| oparms->reconnect = false; |
| } else |
| iov[num].iov_base = create_durable_buf(); |
| if (iov[num].iov_base == NULL) |
| return -ENOMEM; |
| iov[num].iov_len = sizeof(struct create_durable); |
| if (!req->CreateContextsOffset) |
| req->CreateContextsOffset = |
| cpu_to_le32(sizeof(struct smb2_create_req) + |
| iov[1].iov_len); |
| le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable)); |
| *num_iovec = num + 1; |
| return 0; |
| } |
| |
| /* See MS-SMB2 2.2.13.2.7 */ |
| static struct crt_twarp_ctxt * |
| create_twarp_buf(__u64 timewarp) |
| { |
| struct crt_twarp_ctxt *buf; |
| |
| buf = kzalloc(sizeof(struct crt_twarp_ctxt), GFP_KERNEL); |
| if (!buf) |
| return NULL; |
| |
| buf->ccontext.DataOffset = cpu_to_le16(offsetof |
| (struct crt_twarp_ctxt, Timestamp)); |
| buf->ccontext.DataLength = cpu_to_le32(8); |
| buf->ccontext.NameOffset = cpu_to_le16(offsetof |
| (struct crt_twarp_ctxt, Name)); |
| buf->ccontext.NameLength = cpu_to_le16(4); |
| /* SMB2_CREATE_TIMEWARP_TOKEN is "TWrp" */ |
| buf->Name[0] = 'T'; |
| buf->Name[1] = 'W'; |
| buf->Name[2] = 'r'; |
| buf->Name[3] = 'p'; |
| buf->Timestamp = cpu_to_le64(timewarp); |
| return buf; |
| } |
| |
| /* See MS-SMB2 2.2.13.2.7 */ |
| static int |
| add_twarp_context(struct kvec *iov, unsigned int *num_iovec, __u64 timewarp) |
| { |
| struct smb2_create_req *req = iov[0].iov_base; |
| unsigned int num = *num_iovec; |
| |
| iov[num].iov_base = create_twarp_buf(timewarp); |
| if (iov[num].iov_base == NULL) |
| return -ENOMEM; |
| iov[num].iov_len = sizeof(struct crt_twarp_ctxt); |
| if (!req->CreateContextsOffset) |
| req->CreateContextsOffset = cpu_to_le32( |
| sizeof(struct smb2_create_req) + |
| iov[num - 1].iov_len); |
| le32_add_cpu(&req->CreateContextsLength, sizeof(struct crt_twarp_ctxt)); |
| *num_iovec = num + 1; |
| return 0; |
| } |
| |
| static int |
| alloc_path_with_tree_prefix(__le16 **out_path, int *out_size, int *out_len, |
| const char *treename, const __le16 *path) |
| { |
| int treename_len, path_len; |
| struct nls_table *cp; |
| const __le16 sep[] = {cpu_to_le16('\\'), cpu_to_le16(0x0000)}; |
| |
| /* |
| * skip leading "\\" |
| */ |
| treename_len = strlen(treename); |
| if (treename_len < 2 || !(treename[0] == '\\' && treename[1] == '\\')) |
| return -EINVAL; |
| |
| treename += 2; |
| treename_len -= 2; |
| |
| path_len = UniStrnlen((wchar_t *)path, PATH_MAX); |
| |
| /* |
| * make room for one path separator between the treename and |
| * path |
| */ |
| *out_len = treename_len + 1 + path_len; |
| |
| /* |
| * final path needs to be null-terminated UTF16 with a |
| * size aligned to 8 |
| */ |
| |
| *out_size = roundup((*out_len+1)*2, 8); |
| *out_path = kzalloc(*out_size, GFP_KERNEL); |
| if (!*out_path) |
| return -ENOMEM; |
| |
| cp = load_nls_default(); |
| cifs_strtoUTF16(*out_path, treename, treename_len, cp); |
| UniStrcat(*out_path, sep); |
| UniStrcat(*out_path, path); |
| unload_nls(cp); |
| |
| return 0; |
| } |
| |
| int smb311_posix_mkdir(const unsigned int xid, struct inode *inode, |
| umode_t mode, struct cifs_tcon *tcon, |
| const char *full_path, |
| struct cifs_sb_info *cifs_sb) |
| { |
| struct smb_rqst rqst; |
| struct smb2_create_req *req; |
| struct smb2_create_rsp *rsp = NULL; |
| struct cifs_ses *ses = tcon->ses; |
| struct kvec iov[3]; /* make sure at least one for each open context */ |
| struct kvec rsp_iov = {NULL, 0}; |
| int resp_buftype; |
| int uni_path_len; |
| __le16 *copy_path = NULL; |
| int copy_size; |
| int rc = 0; |
| unsigned int n_iov = 2; |
| __u32 file_attributes = 0; |
| char *pc_buf = NULL; |
| int flags = 0; |
| unsigned int total_len; |
| __le16 *utf16_path = NULL; |
| |
| cifs_dbg(FYI, "mkdir\n"); |
| |
| /* resource #1: path allocation */ |
| utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb); |
| if (!utf16_path) |
| return -ENOMEM; |
| |
| if (!ses || !(ses->server)) { |
| rc = -EIO; |
| goto err_free_path; |
| } |
| |
| /* resource #2: request */ |
| rc = smb2_plain_req_init(SMB2_CREATE, tcon, (void **) &req, &total_len); |
| if (rc) |
| goto err_free_path; |
| |
| |
| if (smb3_encryption_required(tcon)) |
| flags |= CIFS_TRANSFORM_REQ; |
| |
| req->ImpersonationLevel = IL_IMPERSONATION; |
| req->DesiredAccess = cpu_to_le32(FILE_WRITE_ATTRIBUTES); |
| /* File attributes ignored on open (used in create though) */ |
| req->FileAttributes = cpu_to_le32(file_attributes); |
| req->ShareAccess = FILE_SHARE_ALL_LE; |
| req->CreateDisposition = cpu_to_le32(FILE_CREATE); |
| req->CreateOptions = cpu_to_le32(CREATE_NOT_FILE); |
| |
| iov[0].iov_base = (char *)req; |
| /* -1 since last byte is buf[0] which is sent below (path) */ |
| iov[0].iov_len = total_len - 1; |
| |
| req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req)); |
| |
| /* [MS-SMB2] 2.2.13 NameOffset: |
| * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of |
| * the SMB2 header, the file name includes a prefix that will |
| * be processed during DFS name normalization as specified in |
| * section 3.3.5.9. Otherwise, the file name is relative to |
| * the share that is identified by the TreeId in the SMB2 |
| * header. |
| */ |
| if (tcon->share_flags & SHI1005_FLAGS_DFS) { |
| int name_len; |
| |
| req->sync_hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS; |
| rc = alloc_path_with_tree_prefix(©_path, ©_size, |
| &name_len, |
| tcon->treeName, utf16_path); |
| if (rc) |
| goto err_free_req; |
| |
| req->NameLength = cpu_to_le16(name_len * 2); |
| uni_path_len = copy_size; |
| /* free before overwriting resource */ |
| kfree(utf16_path); |
| utf16_path = copy_path; |
| } else { |
| uni_path_len = (2 * UniStrnlen((wchar_t *)utf16_path, PATH_MAX)) + 2; |
| /* MUST set path len (NameLength) to 0 opening root of share */ |
| req->NameLength = cpu_to_le16(uni_path_len - 2); |
| if (uni_path_len % 8 != 0) { |
| copy_size = roundup(uni_path_len, 8); |
| copy_path = kzalloc(copy_size, GFP_KERNEL); |
| if (!copy_path) { |
| rc = -ENOMEM; |
| goto err_free_req; |
| } |
| memcpy((char *)copy_path, (const char *)utf16_path, |
| uni_path_len); |
| uni_path_len = copy_size; |
| /* free before overwriting resource */ |
| kfree(utf16_path); |
| utf16_path = copy_path; |
| } |
| } |
| |
| iov[1].iov_len = uni_path_len; |
| iov[1].iov_base = utf16_path; |
| req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_NONE; |
| |
| if (tcon->posix_extensions) { |
| /* resource #3: posix buf */ |
| rc = add_posix_context(iov, &n_iov, mode); |
| if (rc) |
| goto err_free_req; |
| pc_buf = iov[n_iov-1].iov_base; |
| } |
| |
| |
| memset(&rqst, 0, sizeof(struct smb_rqst)); |
| rqst.rq_iov = iov; |
| rqst.rq_nvec = n_iov; |
| |
| /* resource #4: response buffer */ |
| rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov); |
| if (rc) { |
| cifs_stats_fail_inc(tcon, SMB2_CREATE_HE); |
| trace_smb3_posix_mkdir_err(xid, tcon->tid, ses->Suid, |
| CREATE_NOT_FILE, |
| FILE_WRITE_ATTRIBUTES, rc); |
| goto err_free_rsp_buf; |
| } |
| |
| rsp = (struct smb2_create_rsp *)rsp_iov.iov_base; |
| trace_smb3_posix_mkdir_done(xid, rsp->PersistentFileId, tcon->tid, |
| ses->Suid, CREATE_NOT_FILE, |
| FILE_WRITE_ATTRIBUTES); |
| |
| SMB2_close(xid, tcon, rsp->PersistentFileId, rsp->VolatileFileId); |
| |
| /* Eventually save off posix specific response info and timestaps */ |
| |
| err_free_rsp_buf: |
| free_rsp_buf(resp_buftype, rsp); |
| kfree(pc_buf); |
| err_free_req: |
| cifs_small_buf_release(req); |
| err_free_path: |
| kfree(utf16_path); |
| return rc; |
| } |
| |
| int |
| SMB2_open_init(struct cifs_tcon *tcon, struct smb_rqst *rqst, __u8 *oplock, |
| struct cifs_open_parms *oparms, __le16 *path) |
| { |
| struct TCP_Server_Info *server = tcon->ses->server; |
| struct smb2_create_req *req; |
| unsigned int n_iov = 2; |
| __u32 file_attributes = 0; |
| int copy_size; |
| int uni_path_len; |
| unsigned int total_len; |
| struct kvec *iov = rqst->rq_iov; |
| __le16 *copy_path; |
| int rc; |
| |
| rc = smb2_plain_req_init(SMB2_CREATE, tcon, (void **) &req, &total_len); |
| if (rc) |
| return rc; |
| |
| iov[0].iov_base = (char *)req; |
| /* -1 since last byte is buf[0] which is sent below (path) */ |
| iov[0].iov_len = total_len - 1; |
| |
| if (oparms->create_options & CREATE_OPTION_READONLY) |
| file_attributes |= ATTR_READONLY; |
| if (oparms->create_options & CREATE_OPTION_SPECIAL) |
| file_attributes |= ATTR_SYSTEM; |
| |
| req->ImpersonationLevel = IL_IMPERSONATION; |
| req->DesiredAccess = cpu_to_le32(oparms->desired_access); |
| /* File attributes ignored on open (used in create though) */ |
| req->FileAttributes = cpu_to_le32(file_attributes); |
| req->ShareAccess = FILE_SHARE_ALL_LE; |
| req->CreateDisposition = cpu_to_le32(oparms->disposition); |
| req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK); |
| req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req)); |
| |
| /* [MS-SMB2] 2.2.13 NameOffset: |
| * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of |
| * the SMB2 header, the file name includes a prefix that will |
| * be processed during DFS name normalization as specified in |
| * section 3.3.5.9. Otherwise, the file name is relative to |
| * the share that is identified by the TreeId in the SMB2 |
| * header. |
| */ |
| if (tcon->share_flags & SHI1005_FLAGS_DFS) { |
| int name_len; |
| |
| req->sync_hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS; |
| rc = alloc_path_with_tree_prefix(©_path, ©_size, |
| &name_len, |
| tcon->treeName, path); |
| if (rc) |
| return rc; |
| req->NameLength = cpu_to_le16(name_len * 2); |
| uni_path_len = copy_size; |
| path = copy_path; |
| } else { |
| uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2; |
| /* MUST set path len (NameLength) to 0 opening root of share */ |
| req->NameLength = cpu_to_le16(uni_path_len - 2); |
| copy_size = uni_path_len; |
| if (copy_size % 8 != 0) |
| copy_size = roundup(copy_size, 8); |
| copy_path = kzalloc(copy_size, GFP_KERNEL); |
| if (!copy_path) |
| return -ENOMEM; |
| memcpy((char *)copy_path, (const char *)path, |
| uni_path_len); |
| uni_path_len = copy_size; |
| path = copy_path; |
| } |
| |
| iov[1].iov_len = uni_path_len; |
| iov[1].iov_base = path; |
| |
| if (!server->oplocks) |
| *oplock = SMB2_OPLOCK_LEVEL_NONE; |
| |
| if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) || |
| *oplock == SMB2_OPLOCK_LEVEL_NONE) |
| req->RequestedOplockLevel = *oplock; |
| else if (!(server->capabilities & SMB2_GLOBAL_CAP_DIRECTORY_LEASING) && |
| (oparms->create_options & CREATE_NOT_FILE)) |
| req->RequestedOplockLevel = *oplock; /* no srv lease support */ |
| else { |
| rc = add_lease_context(server, iov, &n_iov, |
| oparms->fid->lease_key, oplock); |
| if (rc) |
| return rc; |
| } |
| |
| if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) { |
| /* need to set Next field of lease context if we request it */ |
| if (server->capabilities & SMB2_GLOBAL_CAP_LEASING) { |
| struct create_context *ccontext = |
| (struct create_context *)iov[n_iov-1].iov_base; |
| ccontext->Next = |
| cpu_to_le32(server->vals->create_lease_size); |
| } |
| |
| rc = add_durable_context(iov, &n_iov, oparms, |
| tcon->use_persistent); |
| if (rc) |
| return rc; |
| } |
| |
| if (tcon->posix_extensions) { |
| if (n_iov > 2) { |
| struct create_context *ccontext = |
| (struct create_context *)iov[n_iov-1].iov_base; |
| ccontext->Next = |
| cpu_to_le32(iov[n_iov-1].iov_len); |
| } |
| |
| rc = add_posix_context(iov, &n_iov, oparms->mode); |
| if (rc) |
| return rc; |
| } |
| |
| if (tcon->snapshot_time) { |
| cifs_dbg(FYI, "adding snapshot context\n"); |
| if (n_iov > 2) { |
| struct create_context *ccontext = |
| (struct create_context *)iov[n_iov-1].iov_base; |
| ccontext->Next = |
| cpu_to_le32(iov[n_iov-1].iov_len); |
| } |
| |
| rc = add_twarp_context(iov, &n_iov, tcon->snapshot_time); |
| if (rc) |
| return rc; |
| } |
| |
| |
| rqst->rq_nvec = n_iov; |
| return 0; |
| } |
| |
| /* rq_iov[0] is the request and is released by cifs_small_buf_release(). |
| * All other vectors are freed by kfree(). |
| */ |
| void |
| SMB2_open_free(struct smb_rqst *rqst) |
| { |
| int i; |
| |
| if (rqst && rqst->rq_iov) { |
| cifs_small_buf_release(rqst->rq_iov[0].iov_base); |
| for (i = 1; i < rqst->rq_nvec; i++) |
| if (rqst->rq_iov[i].iov_base != smb2_padding) |
| kfree(rqst->rq_iov[i].iov_base); |
| } |
| } |
| |
| int |
| SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path, |
| __u8 *oplock, struct smb2_file_all_info *buf, |
| struct kvec *err_iov, int *buftype) |
| { |
| struct smb_rqst rqst; |
| struct smb2_create_rsp *rsp = NULL; |
| struct TCP_Server_Info *server; |
| struct cifs_tcon *tcon = oparms->tcon; |
| struct cifs_ses *ses = tcon->ses; |
| struct kvec iov[SMB2_CREATE_IOV_SIZE]; |
| struct kvec rsp_iov = {NULL, 0}; |
| int resp_buftype = CIFS_NO_BUFFER; |
| int rc = 0; |
| int flags = 0; |
| |
| cifs_dbg(FYI, "create/open\n"); |
| if (ses && (ses->server)) |
| server = ses->server; |
| else |
| return -EIO; |
| |
| if (smb3_encryption_required(tcon)) |
| flags |= CIFS_TRANSFORM_REQ; |
| |
| memset(&rqst, 0, sizeof(struct smb_rqst)); |
| memset(&iov, 0, sizeof(iov)); |
| rqst.rq_iov = iov; |
| rqst.rq_nvec = SMB2_CREATE_IOV_SIZE; |
| |
| rc = SMB2_open_init(tcon, &rqst, oplock, oparms, path); |
| if (rc) |
| goto creat_exit; |
| |
| rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, |
| &rsp_iov); |
| rsp = (struct smb2_create_rsp *)rsp_iov.iov_base; |
| |
| if (rc != 0) { |
| cifs_stats_fail_inc(tcon, SMB2_CREATE_HE); |
| if (err_iov && rsp) { |
| *err_iov = rsp_iov; |
| *buftype = resp_buftype; |
| resp_buftype = CIFS_NO_BUFFER; |
| rsp = NULL; |
| } |
| trace_smb3_open_err(xid, tcon->tid, ses->Suid, |
| oparms->create_options, oparms->desired_access, rc); |
| goto creat_exit; |
| } else |
| trace_smb3_open_done(xid, rsp->PersistentFileId, tcon->tid, |
| ses->Suid, oparms->create_options, |
| oparms->desired_access); |
| |
| atomic_inc(&tcon->num_remote_opens); |
| oparms->fid->persistent_fid = rsp->PersistentFileId; |
| oparms->fid->volatile_fid = rsp->VolatileFileId; |
| #ifdef CONFIG_CIFS_DEBUG2 |
| oparms->fid->mid = le64_to_cpu(rsp->sync_hdr.MessageId); |
| #endif /* CIFS_DEBUG2 */ |
| |
| if (buf) { |
| memcpy(buf, &rsp->CreationTime, 32); |
| buf->AllocationSize = rsp->AllocationSize; |
| buf->EndOfFile = rsp->EndofFile; |
| buf->Attributes = rsp->FileAttributes; |
| buf->NumberOfLinks = cpu_to_le32(1); |
| buf->DeletePending = 0; |
| } |
| |
| if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE) |
| *oplock = parse_lease_state(server, rsp, &oparms->fid->epoch, |
| oparms->fid->lease_key); |
| else |
| *oplock = rsp->OplockLevel; |
| creat_exit: |
| SMB2_open_free(&rqst); |
| free_rsp_buf(resp_buftype, rsp); |
| return rc; |
| } |
| |
| /* |
| * SMB2 IOCTL is used for both IOCTLs and FSCTLs |
| */ |
| int |
| SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, |
| u64 volatile_fid, u32 opcode, bool is_fsctl, |
| char *in_data, u32 indatalen, |
| char **out_data, u32 *plen /* returned data len */) |
| { |
| struct smb_rqst rqst; |
| struct smb2_ioctl_req *req; |
| struct smb2_ioctl_rsp *rsp; |
| struct cifs_ses *ses; |
| struct kvec iov[2]; |
| struct kvec rsp_iov; |
| int resp_buftype; |
| int n_iov; |
| int rc = 0; |
| int flags = 0; |
| unsigned int total_len; |
| |
| cifs_dbg(FYI, "SMB2 IOCTL\n"); |
| |
| if (out_data != NULL) |
| *out_data = NULL; |
| |
| /* zero out returned data len, in case of error */ |
| if (plen) |
| *plen = 0; |
| |
| if (tcon) |
| ses = tcon->ses; |
| else |
| return -EIO; |
| |
| if (!ses || !(ses->server)) |
| return -EIO; |
| |
| rc = smb2_plain_req_init(SMB2_IOCTL, tcon, (void **) &req, &total_len); |
| if (rc) |
| return rc; |
| |
| if (smb3_encryption_required(tcon)) |
| flags |= CIFS_TRANSFORM_REQ; |
| |
| req->CtlCode = cpu_to_le32(opcode); |
| req->PersistentFileId = persistent_fid; |
| req->VolatileFileId = volatile_fid; |
| |
| if (indatalen) { |
| req->InputCount = cpu_to_le32(indatalen); |
| /* do not set InputOffset if no input data */ |
| req->InputOffset = |
| cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer)); |
| iov[1].iov_base = in_data; |
| iov[1].iov_len = indatalen; |
| n_iov = 2; |
| } else |
| n_iov = 1; |
| |
| req->OutputOffset = 0; |
| req->OutputCount = 0; /* MBZ */ |
| |
| /* |
| * Could increase MaxOutputResponse, but that would require more |
| * than one credit. Windows typically sets this smaller, but for some |
| * ioctls it may be useful to allow server to send more. No point |
| * limiting what the server can send as long as fits in one credit |
| * Unfortunately - we can not handle more than CIFS_MAX_MSG_SIZE |
| * (by default, note that it can be overridden to make max larger) |
| * in responses (except for read responses which can be bigger. |
| * We may want to bump this limit up |
| */ |
| req->MaxOutputResponse = cpu_to_le32(CIFSMaxBufSize); |
| |
| if (is_fsctl) |
| req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL); |
| else |
| req->Flags = 0; |
| |
| iov[0].iov_base = (char *)req; |
| |
| /* |
| * If no input data, the size of ioctl struct in |
| * protocol spec still includes a 1 byte data buffer, |
| * but if input data passed to ioctl, we do not |
| * want to double count this, so we do not send |
| * the dummy one byte of data in iovec[0] if sending |
| * input data (in iovec[1]). |
| */ |
| |
| if (indatalen) { |
| iov[0].iov_len = total_len - 1; |
| } else |
| iov[0].iov_len = total_len; |
| |
| /* validate negotiate request must be signed - see MS-SMB2 3.2.5.5 */ |
| if (opcode == FSCTL_VALIDATE_NEGOTIATE_INFO) |
| req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED; |
| |
| memset(&rqst, 0, sizeof(struct smb_rqst)); |
| rqst.rq_iov = iov; |
| rqst.rq_nvec = n_iov; |
| |
| rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, |
| &rsp_iov); |
| cifs_small_buf_release(req); |
| rsp = (struct smb2_ioctl_rsp *)rsp_iov.iov_base; |
| |
| if (rc != 0) |
| trace_smb3_fsctl_err(xid, persistent_fid, tcon->tid, |
| ses->Suid, 0, opcode, rc); |
| |
| if ((rc != 0) && (rc != -EINVAL)) { |
| cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE); |
| goto ioctl_exit; |
| } else if (rc == -EINVAL) { |
| if ((opcode != FSCTL_SRV_COPYCHUNK_WRITE) && |
| (opcode != FSCTL_SRV_COPYCHUNK)) { |
| cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE); |
| goto ioctl_exit; |
| } |
| } |
| |
| /* check if caller wants to look at return data or just return rc */ |
| if ((plen == NULL) || (out_data == NULL)) |
| goto ioctl_exit; |
| |
| *plen = le32_to_cpu(rsp->OutputCount); |
| |
| /* We check for obvious errors in the output buffer length and offset */ |
| if (*plen == 0) |
| goto ioctl_exit; /* server returned no data */ |
| else if (*plen > rsp_iov.iov_len || *plen > 0xFF00) { |
| cifs_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen); |
| *plen = 0; |
| rc = -EIO; |
| goto ioctl_exit; |
| } |
| |
| if (rsp_iov.iov_len - *plen < le32_to_cpu(rsp->OutputOffset)) { |
| cifs_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen, |
| le32_to_cpu(rsp->OutputOffset)); |
| *plen = 0; |
| rc = -EIO; |
| goto ioctl_exit; |
| } |
| |
| *out_data = kmemdup((char *)rsp + le32_to_cpu(rsp->OutputOffset), |
| *plen, GFP_KERNEL); |
| if (*out_data == NULL) { |
| rc = -ENOMEM; |
| goto ioctl_exit; |
| } |
| |
| ioctl_exit: |
| free_rsp_buf(resp_buftype, rsp); |
| return rc; |
| } |
| |
| /* |
| * Individual callers to ioctl worker function follow |
| */ |
| |
| int |
| SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon, |
| u64 persistent_fid, u64 volatile_fid) |
| { |
| int rc; |
| struct compress_ioctl fsctl_input; |
| char *ret_data = NULL; |
| |
| fsctl_input.CompressionState = |
| cpu_to_le16(COMPRESSION_FORMAT_DEFAULT); |
| |
| rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid, |
| FSCTL_SET_COMPRESSION, true /* is_fsctl */, |
| (char *)&fsctl_input /* data input */, |
| 2 /* in data len */, &ret_data /* out data */, NULL); |
| |
| cifs_dbg(FYI, "set compression rc %d\n", rc); |
| |
| return rc; |
| } |
| |
| int |
| SMB2_close_init(struct cifs_tcon *tcon, struct smb_rqst *rqst, |
| u64 persistent_fid, u64 volatile_fid) |
| { |
| struct smb2_close_req *req; |
| struct kvec *iov = rqst->rq_iov; |
| unsigned int total_len; |
| int rc; |
| |
| rc = smb2_plain_req_init(SMB2_CLOSE, tcon, (void **) &req, &total_len); |
| if (rc) |
| return rc; |
| |
| req->PersistentFileId = persistent_fid; |
| req->VolatileFileId = volatile_fid; |
| iov[0].iov_base = (char *)req; |
| iov[0].iov_len = total_len; |
| |
| return 0; |
| } |
| |
| void |
| SMB2_close_free(struct smb_rqst *rqst) |
| { |
| if (rqst && rqst->rq_iov) |
| cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */ |
| } |
| |
| int |
| SMB2_close_flags(const unsigned int xid, struct cifs_tcon *tcon, |
| u64 persistent_fid, u64 volatile_fid, int flags) |
| { |
| struct smb_rqst rqst; |
| struct smb2_close_rsp *rsp = NULL; |
| struct cifs_ses *ses = tcon->ses; |
| struct kvec iov[1]; |
| struct kvec rsp_iov; |
| int resp_buftype = CIFS_NO_BUFFER; |
| int rc = 0; |
| |
| cifs_dbg(FYI, "Close\n"); |
| |
| if (!ses || !(ses->server)) |
| return -EIO; |
| |
| if (smb3_encryption_required(tcon)) |
| flags |= CIFS_TRANSFORM_REQ; |
| |
| memset(&rqst, 0, sizeof(struct smb_rqst)); |
| memset(&iov, 0, sizeof(iov)); |
| rqst.rq_iov = iov; |
| rqst.rq_nvec = 1; |
| |
| rc = SMB2_close_init(tcon, &rqst, persistent_fid, volatile_fid); |
| if (rc) |
| goto close_exit; |
| |
| rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov); |
| rsp = (struct smb2_close_rsp *)rsp_iov.iov_base; |
| |
| if (rc != 0) { |
| cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE); |
| trace_smb3_close_err(xid, persistent_fid, tcon->tid, ses->Suid, |
| rc); |
| goto close_exit; |
| } |
| |
| atomic_dec(&tcon->num_remote_opens); |
| |
| /* BB FIXME - decode close response, update inode for caching */ |
| |
| close_exit: |
| SMB2_close_free(&rqst); |
| free_rsp_buf(resp_buftype, rsp); |
| return rc; |
| } |
| |
| int |
| SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, |
| u64 persistent_fid, u64 volatile_fid) |
| { |
| return SMB2_close_flags(xid, tcon, persistent_fid, volatile_fid, 0); |
| } |
| |
| int |
| smb2_validate_iov(unsigned int offset, unsigned int buffer_length, |
| struct kvec *iov, unsigned int min_buf_size) |
| { |
| unsigned int smb_len = iov->iov_len; |
| char *end_of_smb = smb_len + (char *)iov->iov_base; |
| char *begin_of_buf = offset + (char *)iov->iov_base; |
| char *end_of_buf = begin_of_buf + buffer_length; |
| |
| |
| if (buffer_length < min_buf_size) { |
| cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n", |
| buffer_length, min_buf_size); |
| return -EINVAL; |
| } |
| |
| /* check if beyond RFC1001 maximum length */ |
| if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) { |
| cifs_dbg(VFS, "buffer length %d or smb length %d too large\n", |
| buffer_length, smb_len); |
| return -EINVAL; |
| } |
| |
| if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) { |
| cifs_dbg(VFS, "illegal server response, bad offset to data\n"); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * If SMB buffer fields are valid, copy into temporary buffer to hold result. |
| * Caller must free buffer. |
| */ |
| int |
| smb2_validate_and_copy_iov(unsigned int offset, unsigned int buffer_length, |
| struct kvec *iov, unsigned int minbufsize, |
| char *data) |
| { |
| char *begin_of_buf = offset + (char *)iov->iov_base; |
| int rc; |
| |
| if (!data) |
| return -EINVAL; |
| |
| rc = smb2_validate_iov(offset, buffer_length, iov, minbufsize); |
| if (rc) |
| return rc; |
| |
| memcpy(data, begin_of_buf, buffer_length); |
| |
| return 0; |
| } |
| |
| int |
| SMB2_query_info_init(struct cifs_tcon *tcon, struct smb_rqst *rqst, |
| u64 persistent_fid, u64 volatile_fid, |
| u8 info_class, u8 info_type, u32 additional_info, |
| size_t output_len, size_t input_len, void *input) |
| { |
| struct smb2_query_info_req *req; |
| struct kvec *iov = rqst->rq_iov; |
| unsigned int total_len; |
| int rc; |
| |
| rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, (void **) &req, |
| &total_len); |
| if (rc) |
| return rc; |
| |
| req->InfoType = info_type; |
| req->FileInfoClass = info_class; |
| req->PersistentFileId = persistent_fid; |
| req->VolatileFileId = volatile_fid; |
| req->AdditionalInformation = cpu_to_le32(additional_info); |
| |
| req->OutputBufferLength = cpu_to_le32(output_len); |
| if (input_len) { |
| req->InputBufferLength = cpu_to_le32(input_len); |
| /* total_len for smb query request never close to le16 max */ |
| req->InputBufferOffset = cpu_to_le16(total_len - 1); |
| memcpy(req->Buffer, input, input_len); |
| } |
| |
| iov[0].iov_base = (char *)req; |
| /* 1 for Buffer */ |
| iov[0].iov_len = total_len - 1 + input_len; |
| return 0; |
| } |
| |
| void |
| SMB2_query_info_free(struct smb_rqst *rqst) |
| { |
| if (rqst && rqst->rq_iov) |
| cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */ |
| } |
| |
| static int |
| query_info(const unsigned int xid, struct cifs_tcon *tcon, |
| u64 persistent_fid, u64 volatile_fid, u8 info_class, u8 info_type, |
| u32 additional_info, size_t output_len, size_t min_len, void **data, |
| u32 *dlen) |
| { |
| struct smb_rqst rqst; |
| struct smb2_query_info_rsp *rsp = NULL; |
| struct kvec iov[1]; |
| struct kvec rsp_iov; |
| int rc = 0; |
| int resp_buftype = CIFS_NO_BUFFER; |
| struct cifs_ses *ses = tcon->ses; |
| int flags = 0; |
| |
| cifs_dbg(FYI, "Query Info\n"); |
| |
| if (!ses || !(ses->server)) |
| return -EIO; |
| |
| if (smb3_encryption_required(tcon)) |
| flags |= CIFS_TRANSFORM_REQ; |
| |
| memset(&rqst, 0, sizeof(struct smb_rqst)); |
| memset(&iov, 0, sizeof(iov)); |
| rqst.rq_iov = iov; |
| rqst.rq_nvec = 1; |
| |
| rc = SMB2_query_info_init(tcon, &rqst, persistent_fid, volatile_fid, |
| info_class, info_type, additional_info, |
| output_len, 0, NULL); |
| if (rc) |
| goto qinf_exit; |
| |
| rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov); |
| rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; |
| |
| if (rc) { |
| cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); |
| trace_smb3_query_info_err(xid, persistent_fid, tcon->tid, |
| ses->Suid, info_class, (__u32)info_type, rc); |
| goto qinf_exit; |
| } |
| |
| if (dlen) { |
| *dlen = le32_to_cpu(rsp->OutputBufferLength); |
| if (!*data) { |
| *data = kmalloc(*dlen, GFP_KERNEL); |
| if (!*data) { |
| cifs_dbg(VFS, |
| "Error %d allocating memory for acl\n", |
| rc); |
| *dlen = 0; |
| goto qinf_exit; |
| } |
| } |
| } |
| |
| rc = smb2_validate_and_copy_iov(le16_to_cpu(rsp->OutputBufferOffset), |
| le32_to_cpu(rsp->OutputBufferLength), |
| &rsp_iov, min_len, *data); |
| |
| qinf_exit: |
| SMB2_query_info_free(&rqst); |
| free_rsp_buf(resp_buftype, rsp); |
| return rc; |
| } |
| |
| int SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon, |
| u64 persistent_fid, u64 volatile_fid, struct smb2_file_all_info *data) |
| { |
| return query_info(xid, tcon, persistent_fid, volatile_fid, |
| FILE_ALL_INFORMATION, SMB2_O_INFO_FILE, 0, |
| sizeof(struct smb2_file_all_info) + PATH_MAX * 2, |
| sizeof(struct smb2_file_all_info), (void **)&data, |
| NULL); |
| } |
| |
| int |
| SMB2_query_acl(const unsigned int xid, struct cifs_tcon *tcon, |
| u64 persistent_fid, u64 volatile_fid, |
| void **data, u32 *plen) |
| { |
| __u32 additional_info = OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO; |
| *plen = 0; |
| |
| return query_info(xid, tcon, persistent_fid, volatile_fid, |
| 0, SMB2_O_INFO_SECURITY, additional_info, |
| SMB2_MAX_BUFFER_SIZE, MIN_SEC_DESC_LEN, data, plen); |
| } |
| |
| int |
| SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon, |
| u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid) |
| { |
| return query_info(xid, tcon, persistent_fid, volatile_fid, |
| FILE_INTERNAL_INFORMATION, SMB2_O_INFO_FILE, 0, |
| sizeof(struct smb2_file_internal_info), |
| sizeof(struct smb2_file_internal_info), |
| (void **)&uniqueid, NULL); |
| } |
| |
| /* |
| * This is a no-op for now. We're not really interested in the reply, but |
| * rather in the fact that the server sent one and that server->lstrp |
| * gets updated. |
| * |
| * FIXME: maybe we should consider checking that the reply matches request? |
| */ |
| static void |
| smb2_echo_callback(struct mid_q_entry *mid) |
| { |
| struct TCP_Server_Info *server = mid->callback_data; |
| struct smb2_echo_rsp *rsp = (struct smb2_echo_rsp *)mid->resp_buf; |
| unsigned int credits_received = 1; |
| |
| if (mid->mid_state == MID_RESPONSE_RECEIVED) |
| credits_received = le16_to_cpu(rsp->sync_hdr.CreditRequest); |
| |
| DeleteMidQEntry(mid); |
| add_credits(server, credits_received, CIFS_ECHO_OP); |
| } |
| |
| void smb2_reconnect_server(struct work_struct *work) |
| { |
| struct TCP_Server_Info *server = container_of(work, |
| struct TCP_Server_Info, reconnect.work); |
| struct cifs_ses *ses; |
| struct cifs_tcon *tcon, *tcon2; |
| struct list_head tmp_list; |
| int tcon_exist = false; |
| int rc; |
| int resched = false; |
| |
| |
| /* Prevent simultaneous reconnects that can corrupt tcon->rlist list */ |
| mutex_lock(&server->reconnect_mutex); |
| |
| INIT_LIST_HEAD(&tmp_list); |
| cifs_dbg(FYI, "Need negotiate, reconnecting tcons\n"); |
| |
| spin_lock(&cifs_tcp_ses_lock); |
| list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { |
| list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { |
| if (tcon->need_reconnect || tcon->need_reopen_files) { |
| tcon->tc_count++; |
| list_add_tail(&tcon->rlist, &tmp_list); |
| tcon_exist = true; |
| } |
| } |
| if (ses->tcon_ipc && ses->tcon_ipc->need_reconnect) { |
| list_add_tail(&ses->tcon_ipc->rlist, &tmp_list); |
| tcon_exist = true; |
| } |
| } |
| /* |
| * Get the reference to server struct to be sure that the last call of |
| * cifs_put_tcon() in the loop below won't release the server pointer. |
| */ |
| if (tcon_exist) |
| server->srv_count++; |
| |
| spin_unlock(&cifs_tcp_ses_lock); |
| |
| list_for_each_entry_safe(tcon, tcon2, &tmp_list, rlist) { |
| rc = smb2_reconnect(SMB2_INTERNAL_CMD, tcon); |
| if (!rc) |
| cifs_reopen_persistent_handles(tcon); |
| else |
| resched = true; |
| list_del_init(&tcon->rlist); |
| cifs_put_tcon(tcon); |
| } |
| |
| cifs_dbg(FYI, "Reconnecting tcons finished\n"); |
| if (resched) |
| queue_delayed_work(cifsiod_wq, &server->reconnect, 2 * HZ); |
| mutex_unlock(&server->reconnect_mutex); |
| |
| /* now we can safely release srv struct */ |
| if (tcon_exist) |
| cifs_put_tcp_session(server, 1); |
| } |
| |
| int |
| SMB2_echo(struct TCP_Server_Info *server) |
| { |
| struct smb2_echo_req *req; |
| int rc = 0; |
| struct kvec iov[1]; |
| struct smb_rqst rqst = { .rq_iov = iov, |
| .rq_nvec = 1 }; |
| unsigned int total_len; |
| |
| cifs_dbg(FYI, "In echo request\n"); |
| |
| if (server->tcpStatus == CifsNeedNegotiate) { |
| /* No need to send echo on newly established connections */ |
| queue_delayed_work(cifsiod_wq, &server->reconnect, 0); |
| return rc; |
| } |
| |
| rc = smb2_plain_req_init(SMB2_ECHO, NULL, (void **)&req, &total_len); |
| if (rc) |
| return rc; |
| |
| req->sync_hdr.CreditRequest = cpu_to_le16(1); |
| |
| iov[0].iov_len = total_len; |
| iov[0].iov_base = (char *)req; |
| |
| rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, NULL, |
| server, CIFS_ECHO_OP); |
| if (rc) |
| cifs_dbg(FYI, "Echo request failed: %d\n", rc); |
| |
| cifs_small_buf_release(req); |
| return rc; |
| } |
| |
| int |
| SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, |
| u64 volatile_fid) |
| { |
| struct smb_rqst rqst; |
| struct smb2_flush_req *req; |
| struct cifs_ses *ses = tcon->ses; |
| struct kvec iov[1]; |
| struct kvec rsp_iov; |
| int resp_buftype; |
| int rc = 0; |
| int flags = 0; |
| unsigned int total_len; |
| |
| cifs_dbg(FYI, "Flush\n"); |
| |
| if (!ses || !(ses->server)) |
| return -EIO; |
| |
| rc = smb2_plain_req_init(SMB2_FLUSH, tcon, (void **) &req, &total_len); |
| if (rc) |
| return rc; |
| |
| if (smb3_encryption_required(tcon)) |
| flags |= CIFS_TRANSFORM_REQ; |
| |
| req->PersistentFileId = persistent_fid; |
| req->VolatileFileId = volatile_fid; |
| |
| iov[0].iov_base = (char *)req; |
| iov[0].iov_len = total_len; |
| |
| memset(&rqst, 0, sizeof(struct smb_rqst)); |
| rqst.rq_iov = iov; |
| rqst.rq_nvec = 1; |
| |
| rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov); |
| cifs_small_buf_release(req); |
| |
| if (rc != 0) { |
| cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE); |
| trace_smb3_flush_err(xid, persistent_fid, tcon->tid, ses->Suid, |
| rc); |
| } |
| |
| free_rsp_buf(resp_buftype, rsp_iov.iov_base); |
| return rc; |
| } |
| |
| /* |
| * To form a chain of read requests, any read requests after the first should |
| * have the end_of_chain boolean set to true. |
| */ |
| static int |
| smb2_new_read_req(void **buf, unsigned int *total_len, |
| struct cifs_io_parms *io_parms, struct cifs_readdata *rdata, |
| unsigned int remaining_bytes, int request_type) |
| { |
| int rc = -EACCES; |
| struct smb2_read_plain_req *req = NULL; |
| struct smb2_sync_hdr *shdr; |
| struct TCP_Server_Info *server; |
| |
| rc = smb2_plain_req_init(SMB2_READ, io_parms->tcon, (void **) &req, |
| total_len); |
| if (rc) |
| return rc; |
| |
| server = io_parms->tcon->ses->server; |
| if (server == NULL) |
| return -ECONNABORTED; |
| |
| shdr = &req->sync_hdr; |
| shdr->ProcessId = cpu_to_le32(io_parms->pid); |
| |
| req->PersistentFileId = io_parms->persistent_fid; |
| req->VolatileFileId = io_parms->volatile_fid; |
| req->ReadChannelInfoOffset = 0; /* reserved */ |
| req->ReadChannelInfoLength = 0; /* reserved */ |
| req->Channel = 0; /* reserved */ |
| req->MinimumCount = 0; |
| req->Length = cpu_to_le32(io_parms->length); |
| req->Offset = cpu_to_le64(io_parms->offset); |
| #ifdef CONFIG_CIFS_SMB_DIRECT |
| /* |
| * If we want to do a RDMA write, fill in and append |
| * smbd_buffer_descriptor_v1 to the end of read request |
| */ |
| if (server->rdma && rdata && !server->sign && |
| rdata->bytes >= server->smbd_conn->rdma_readwrite_threshold) { |
| |
| struct smbd_buffer_descriptor_v1 *v1; |
| bool need_invalidate = |
| io_parms->tcon->ses->server->dialect == SMB30_PROT_ID; |
| |
| rdata->mr = smbd_register_mr( |
| server->smbd_conn, rdata->pages, |
| rdata->nr_pages, rdata->page_offset, |
| rdata->tailsz, true, need_invalidate); |
| if (!rdata->mr) |
| return -ENOBUFS; |
| |
| req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE; |
| if (need_invalidate) |
| req->Channel = SMB2_CHANNEL_RDMA_V1; |
| req->ReadChannelInfoOffset = |
| cpu_to_le16(offsetof(struct smb2_read_plain_req, Buffer)); |
| req->ReadChannelInfoLength = |
| cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1)); |
| v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0]; |
| v1->offset = cpu_to_le64(rdata->mr->mr->iova); |
| v1->token = cpu_to_le32(rdata->mr->mr->rkey); |
| v1->length = cpu_to_le32(rdata->mr->mr->length); |
| |
| *total_len += sizeof(*v1) - 1; |
| } |
| #endif |
| if (request_type & CHAINED_REQUEST) { |
| if (!(request_type & END_OF_CHAIN)) { |
| /* next 8-byte aligned request */ |
| *total_len = DIV_ROUND_UP(*total_len, 8) * 8; |
| shdr->NextCommand = cpu_to_le32(*total_len); |
| } else /* END_OF_CHAIN */ |
| shdr->NextCommand = 0; |
| if (request_type & RELATED_REQUEST) { |
| shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS; |
| /* |
| * Related requests use info from previous read request |
| * in chain. |
| */ |
| shdr->SessionId = 0xFFFFFFFF; |
| shdr->TreeId = 0xFFFFFFFF; |
| req->PersistentFileId = 0xFFFFFFFF; |
| req->VolatileFileId = 0xFFFFFFFF; |
| } |
| } |
| if (remaining_bytes > io_parms->length) |
| req->RemainingBytes = cpu_to_le32(remaining_bytes); |
| else |
| req->RemainingBytes = 0; |
| |
| *buf = req; |
| return rc; |
| } |
| |
| static void |
| smb2_readv_callback(struct mid_q_entry *mid) |
| { |
| struct cifs_readdata *rdata = mid->callback_data; |
| struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink); |
| struct TCP_Server_Info *server = tcon->ses->server; |
| struct smb2_sync_hdr *shdr = |
| (struct smb2_sync_hdr *)rdata->iov[0].iov_base; |
| unsigned int credits_received = 1; |
| struct smb_rqst rqst = { .rq_iov = rdata->iov, |
| .rq_nvec = 2, |
| .rq_pages = rdata->pages, |
| .rq_offset = rdata->page_offset, |
| .rq_npages = rdata->nr_pages, |
| .rq_pagesz = rdata->pagesz, |
| .rq_tailsz = rdata->tailsz }; |
| |
| cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n", |
| __func__, mid->mid, mid->mid_state, rdata->result, |
| rdata->bytes); |
| |
| switch (mid->mid_state) { |
| case MID_RESPONSE_RECEIVED: |
| credits_received = le16_to_cpu(shdr->CreditRequest); |
| /* result already set, check signature */ |
| if (server->sign && !mid->decrypted) { |
| int rc; |
| |
| rc = smb2_verify_signature(&rqst, server); |
| if (rc) |
| cifs_dbg(VFS, "SMB signature verification returned error = %d\n", |
| rc); |
| } |
| /* FIXME: should this be counted toward the initiating task? */ |
| task_io_account_read(rdata->got_bytes); |
| cifs_stats_bytes_read(tcon, rdata->got_bytes); |
| break; |
| case MID_REQUEST_SUBMITTED: |
| case MID_RETRY_NEEDED: |
| rdata->result = -EAGAIN; |
| if (server->sign && rdata->got_bytes) |
| /* reset bytes number since we can not check a sign */ |
| rdata->got_bytes = 0; |
| /* FIXME: should this be counted toward the initiating task? */ |
| task_io_account_read(rdata->got_bytes); |
| cifs_stats_bytes_read(tcon, rdata->got_bytes); |
| break; |
| default: |
| if (rdata->result != -ENODATA) |
| rdata->result = -EIO; |
| } |
| #ifdef CONFIG_CIFS_SMB_DIRECT |
| /* |
| * If this rdata has a memmory registered, the MR can be freed |
| * MR needs to be freed as soon as I/O finishes to prevent deadlock |
| * because they have limited number and are used for future I/Os |
| */ |
| if (rdata->mr) { |
| smbd_deregister_mr(rdata->mr); |
| rdata->mr = NULL; |
| } |
| #endif |
| if (rdata->result) |
| cifs_stats_fail_inc(tcon, SMB2_READ_HE); |
| |
| queue_work(cifsiod_wq, &rdata->work); |
| DeleteMidQEntry(mid); |
| add_credits(server, credits_received, 0); |
| } |
| |
| /* smb2_async_readv - send an async read, and set up mid to handle result */ |
| int |
| smb2_async_readv(struct cifs_readdata *rdata) |
| { |
| int rc, flags = 0; |
| char *buf; |
| struct smb2_sync_hdr *shdr; |
| struct cifs_io_parms io_parms; |
| struct smb_rqst rqst = { .rq_iov = rdata->iov, |
| .rq_nvec = 1 }; |
| struct TCP_Server_Info *server; |
| unsigned int total_len; |
| |
| cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n", |
| __func__, rdata->offset, rdata->bytes); |
| |
| io_parms.tcon = tlink_tcon(rdata->cfile->tlink); |
| io_parms.offset = rdata->offset; |
| io_parms.length = rdata->bytes; |
| io_parms.persistent_fid = rdata->cfile->fid.persistent_fid; |
| io_parms.volatile_fid = rdata->cfile->fid.volatile_fid; |
| io_parms.pid = rdata->pid; |
| |
| server = io_parms.tcon->ses->server; |
| |
| rc = smb2_new_read_req( |
| (void **) &buf, &total_len, &io_parms, rdata, 0, 0); |
| if (rc) { |
| if (rc == -EAGAIN && rdata->credits) { |
| /* credits was reset by reconnect */ |
| rdata->credits = 0; |
| /* reduce in_flight value since we won't send the req */ |
| spin_lock(&server->req_lock); |
| server->in_flight--; |
| spin_unlock(&server->req_lock); |
| } |
| return rc; |
| } |
| |
| if (smb3_encryption_required(io_parms.tcon)) |
| flags |= CIFS_TRANSFORM_REQ; |
| |
| rdata->iov[0].iov_base = buf; |
| rdata->iov[0].iov_len = total_len; |
| |
| shdr = (struct smb2_sync_hdr *)buf; |
| |
| if (rdata->credits) { |
| shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(rdata->bytes, |
| SMB2_MAX_BUFFER_SIZE)); |
| shdr->CreditRequest = shdr->CreditCharge; |
| spin_lock(&server->req_lock); |
| server->credits += rdata->credits - |
| le16_to_cpu(shdr->CreditCharge); |
| spin_unlock(&server->req_lock); |
| wake_up(&server->request_q); |
| flags |= CIFS_HAS_CREDITS; |
| } |
| |
| kref_get(&rdata->refcount); |
| rc = cifs_call_async(io_parms.tcon->ses->server, &rqst, |
| cifs_readv_receive, smb2_readv_callback, |
| smb3_handle_read_data, rdata, flags); |
| if (rc) { |
| kref_put(&rdata->refcount, cifs_readdata_release); |
| cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE); |
| trace_smb3_read_err(rc, 0 /* xid */, io_parms.persistent_fid, |
| io_parms.tcon->tid, io_parms.tcon->ses->Suid, |
| io_parms.offset, io_parms.length); |
| } else |
| trace_smb3_read_done(0 /* xid */, io_parms.persistent_fid, |
| io_parms.tcon->tid, io_parms.tcon->ses->Suid, |
| io_parms.offset, io_parms.length); |
| |
| cifs_small_buf_release(buf); |
| return rc; |
| } |
| |
| int |
| SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms, |
| unsigned int *nbytes, char **buf, int *buf_type) |
| { |
| struct smb_rqst rqst; |
| int resp_buftype, rc = -EACCES; |
| struct smb2_read_plain_req *req = NULL; |
| struct smb2_read_rsp *rsp = NULL; |
| struct kvec iov[1]; |
| struct kvec rsp_iov; |
| unsigned int total_len; |
| int flags = CIFS_LOG_ERROR; |
| struct cifs_ses *ses = io_parms->tcon->ses; |
| |
| *nbytes = 0; |
| rc = smb2_new_read_req((void **)&req, &total_len, io_parms, NULL, 0, 0); |
| if (rc) |
| return rc; |
| |
| if (smb3_encryption_required(io_parms->tcon)) |
| flags |= CIFS_TRANSFORM_REQ; |
| |
| iov[0].iov_base = (char *)req; |
| iov[0].iov_len = total_len; |
| |
| memset(&rqst, 0, sizeof(struct smb_rqst)); |
| rqst.rq_iov = iov; |
| rqst.rq_nvec = 1; |
| |
| rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov); |
| cifs_small_buf_release(req); |
| |
| rsp = (struct smb2_read_rsp *)rsp_iov.iov_base; |
| |
| if (rc) { |
| if (rc != -ENODATA) { |
| cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE); |
| cifs_dbg(VFS, "Send error in read = %d\n", rc); |
| } |
| trace_smb3_read_err(rc, xid, req->PersistentFileId, |
| io_parms->tcon->tid, ses->Suid, |
| io_parms->offset, io_parms->length); |
| free_rsp_buf(resp_buftype, rsp_iov.iov_base); |
| return rc == -ENODATA ? 0 : rc; |
| } else |
| trace_smb3_read_done(xid, req->PersistentFileId, |
| io_parms->tcon->tid, ses->Suid, |
| io_parms->offset, io_parms->length); |
| |
| *nbytes = le32_to_cpu(rsp->DataLength); |
| if ((*nbytes > CIFS_MAX_MSGSIZE) || |
| (*nbytes > io_parms->length)) { |
| cifs_dbg(FYI, "bad length %d for count %d\n", |
| *nbytes, io_parms->length); |
| rc = -EIO; |
| *nbytes = 0; |
| } |
| |
| if (*buf) { |
| memcpy(*buf, (char *)rsp + rsp->DataOffset, *nbytes); |
| free_rsp_buf(resp_buftype, rsp_iov.iov_base); |
| } else if (resp_buftype != CIFS_NO_BUFFER) { |
| *buf = rsp_iov.iov_base; |
| if (resp_buftype == CIFS_SMALL_BUFFER) |
| *buf_type = CIFS_SMALL_BUFFER; |
| else if (resp_buftype == CIFS_LARGE_BUFFER) |
| *buf_type = CIFS_LARGE_BUFFER; |
| } |
| return rc; |
| } |
| |
| /* |
| * Check the mid_state and signature on received buffer (if any), and queue the |
| * workqueue completion task. |
| */ |
| static void |
| smb2_writev_callback(struct mid_q_entry *mid) |
| { |
| struct cifs_writedata *wdata = mid->callback_data; |
| struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink); |
| unsigned int written; |
| struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf; |
| unsigned int credits_received = 1; |
| |
| switch (mid->mid_state) { |
| case MID_RESPONSE_RECEIVED: |
| credits_received = le16_to_cpu(rsp->sync_hdr.CreditRequest); |
| wdata->result = smb2_check_receive(mid, tcon->ses->server, 0); |
| if (wdata->result != 0) |
| break; |
| |
| written = le32_to_cpu(rsp->DataLength); |
| /* |
| * Mask off high 16 bits when bytes written as returned |
| * by the server is greater than bytes requested by the |
| * client. OS/2 servers are known to set incorrect |
| * CountHigh values. |
| */ |
| if (written > wdata->bytes) |
| written &= 0xFFFF; |
| |
| if (written < wdata->bytes) |
| wdata->result = -ENOSPC; |
| else |
| wdata->bytes = written; |
| break; |
| case MID_REQUEST_SUBMITTED: |
| case MID_RETRY_NEEDED: |
| wdata->result = -EAGAIN; |
| break; |
| default: |
| wdata->result = -EIO; |
| break; |
| } |
| #ifdef CONFIG_CIFS_SMB_DIRECT |
| /* |
| * If this wdata has a memory registered, the MR can be freed |
| * The number of MRs available is limited, it's important to recover |
| * used MR as soon as I/O is finished. Hold MR longer in the later |
| * I/O process can possibly result in I/O deadlock due to lack of MR |
| * to send request on I/O retry |
| */ |
| if (wdata->mr) { |
| smbd_deregister_mr(wdata->mr); |
| wdata->mr = NULL; |
| } |
| #endif |
| if (wdata->result) |
| cifs_stats_fail_inc(tcon, SMB2_WRITE_HE); |
| |
| queue_work(cifsiod_wq, &wdata->work); |
| DeleteMidQEntry(mid); |
| add_credits(tcon->ses->server, credits_received, 0); |
| } |
| |
| /* smb2_async_writev - send an async write, and set up mid to handle result */ |
| int |
| smb2_async_writev(struct cifs_writedata *wdata, |
| void (*release)(struct kref *kref)) |
| { |
| int rc = -EACCES, flags = 0; |
| struct smb2_write_req *req = NULL; |
| struct smb2_sync_hdr *shdr; |
| struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink); |
| struct TCP_Server_Info *server = tcon->ses->server; |
| struct kvec iov[1]; |
| struct smb_rqst rqst = { }; |
| unsigned int total_len; |
| |
| rc = smb2_plain_req_init(SMB2_WRITE, tcon, (void **) &req, &total_len); |
| if (rc) { |
| if (rc == -EAGAIN && wdata->credits) { |
| /* credits was reset by reconnect */ |
| wdata->credits = 0; |
| /* reduce in_flight value since we won't send the req */ |
| spin_lock(&server->req_lock); |
| server->in_flight--; |
| spin_unlock(&server->req_lock); |
| } |
| goto async_writev_out; |
| } |
| |
| if (smb3_encryption_required(tcon)) |
| flags |= CIFS_TRANSFORM_REQ; |
| |
| shdr = (struct smb2_sync_hdr *)req; |
| shdr->ProcessId = cpu_to_le32(wdata->cfile->pid); |
| |
| req->PersistentFileId = wdata->cfile->fid.persistent_fid; |
| req->VolatileFileId = wdata->cfile->fid.volatile_fid; |
| req->WriteChannelInfoOffset = 0; |
| req->WriteChannelInfoLength = 0; |
| req->Channel = 0; |
| req->Offset = cpu_to_le64(wdata->offset); |
| req->DataOffset = cpu_to_le16( |
| offsetof(struct smb2_write_req, Buffer)); |
| req->RemainingBytes = 0; |
| #ifdef CONFIG_CIFS_SMB_DIRECT |
| /* |
| * If we want to do a server RDMA read, fill in and append |
| * smbd_buffer_descriptor_v1 to the end of write request |
| */ |
| if (server->rdma && !server->sign && wdata->bytes >= |
| server->smbd_conn->rdma_readwrite_threshold) { |
| |
| struct smbd_buffer_descriptor_v1 *v1; |
| bool need_invalidate = server->dialect == SMB30_PROT_ID; |
| |
| wdata->mr = smbd_register_mr( |
| server->smbd_conn, wdata->pages, |
| wdata->nr_pages, wdata->page_offset, |
| wdata->tailsz, false, need_invalidate); |
| if (!wdata->mr) { |
| rc = -ENOBUFS; |
| goto async_writev_out; |
| } |
| req->Length = 0; |
| req->DataOffset = 0; |
| if (wdata->nr_pages > 1) |
| req->RemainingBytes = |
| cpu_to_le32( |
| (wdata->nr_pages - 1) * wdata->pagesz - |
| wdata->page_offset + wdata->tailsz |
| ); |
| else |
| req->RemainingBytes = cpu_to_le32(wdata->tailsz); |
| req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE; |
| if (need_invalidate) |
| req->Channel = SMB2_CHANNEL_RDMA_V1; |
| req->WriteChannelInfoOffset = |
| cpu_to_le16(offsetof(struct smb2_write_req, Buffer)); |
| req->WriteChannelInfoLength = |
| cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1)); |
| v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0]; |
| v1->offset = cpu_to_le64(wdata->mr->mr->iova); |
| v1->token = cpu_to_le32(wdata->mr->mr->rkey); |
| v1->length = cpu_to_le32(wdata->mr->mr->length); |
| } |
| #endif |
| iov[0].iov_len = total_len - 1; |
| iov[0].iov_base = (char *)req; |
| |
| rqst.rq_iov = iov; |
| rqst.rq_nvec = 1; |
| rqst.rq_pages = wdata->pages; |
| rqst.rq_offset = wdata->page_offset; |
| rqst.rq_npages = wdata->nr_pages; |
| rqst.rq_pagesz = wdata->pagesz; |
| rqst.rq_tailsz = wdata->tailsz; |
| #ifdef CONFIG_CIFS_SMB_DIRECT |
| if (wdata->mr) { |
| iov[0].iov_len += sizeof(struct smbd_buffer_descriptor_v1); |
| rqst.rq_npages = 0; |
| } |
| #endif |
| cifs_dbg(FYI, "async write at %llu %u bytes\n", |
| wdata->offset, wdata->bytes); |
| |
| #ifdef CONFIG_CIFS_SMB_DIRECT |
| /* For RDMA read, I/O size is in RemainingBytes not in Length */ |
| if (!wdata->mr) |
| req->Length = cpu_to_le32(wdata->bytes); |
| #else |
| req->Length = cpu_to_le32(wdata->bytes); |
| #endif |
| |
| if (wdata->credits) { |
| shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(wdata->bytes, |
| SMB2_MAX_BUFFER_SIZE)); |
| shdr->CreditRequest = shdr->CreditCharge; |
| spin_lock(&server->req_lock); |
| server->credits += wdata->credits - |
| le16_to_cpu(shdr->CreditCharge); |
| spin_unlock(&server->req_lock); |
| wake_up(&server->request_q); |
| flags |= CIFS_HAS_CREDITS; |
| } |
| |
| kref_get(&wdata->refcount); |
| rc = cifs_call_async(server, &rqst, NULL, smb2_writev_callback, NULL, |
| wdata, flags); |
| |
| if (rc) { |
| trace_smb3_write_err(0 /* no xid */, req->PersistentFileId, |
| tcon->tid, tcon->ses->Suid, wdata->offset, |
| wdata->bytes, rc); |
| kref_put(&wdata->refcount, release); |
| cifs_stats_fail_inc(tcon, SMB2_WRITE_HE); |
| } else |
| trace_smb3_write_done(0 /* no xid */, req->PersistentFileId, |
| tcon->tid, tcon->ses->Suid, wdata->offset, |
| wdata->bytes); |
| |
| async_writev_out: |
| cifs_small_buf_release(req); |
| return rc; |
| } |
| |
| /* |
| * SMB2_write function gets iov pointer to kvec array with n_vec as a length. |
| * The length field from io_parms must be at least 1 and indicates a number of |
| * elements with data to write that begins with position 1 in iov array. All |
| * data length is specified by count. |
| */ |
| int |
| SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms, |
| unsigned int *nbytes, struct kvec *iov, int n_vec) |
| { |
| struct smb_rqst rqst; |
| int rc = 0; |
| struct smb2_write_req *req = NULL; |
| struct smb2_write_rsp *rsp = NULL; |
| int resp_buftype; |
| struct kvec rsp_iov; |
| int flags = 0; |
| unsigned int total_len; |
| |
| *nbytes = 0; |
| |
| if (n_vec < 1) |
| return rc; |
| |
| rc = smb2_plain_req_init(SMB2_WRITE, io_parms->tcon, (void **) &req, |
| &total_len); |
| if (rc) |
| return rc; |
| |
| if (io_parms->tcon->ses->server == NULL) |
| return -ECONNABORTED; |
| |
| if (smb3_encryption_required(io_parms->tcon)) |
| flags |= CIFS_TRANSFORM_REQ; |
| |
| req->sync_hdr.ProcessId = cpu_to_le32(io_parms->pid); |
| |
| req->PersistentFileId = io_parms->persistent_fid; |
| req->VolatileFileId = io_parms->volatile_fid; |
| req->WriteChannelInfoOffset = 0; |
| req->WriteChannelInfoLength = 0; |
| req->Channel = 0; |
| req->Length = cpu_to_le32(io_parms->length); |
| req->Offset = cpu_to_le64(io_parms->offset); |
| req->DataOffset = cpu_to_le16( |
| offsetof(struct smb2_write_req, Buffer)); |
| req->RemainingBytes = 0; |
| |
| iov[0].iov_base = (char *)req; |
| /* 1 for Buffer */ |
| iov[0].iov_len = total_len - 1; |
| |
| memset(&rqst, 0, sizeof(struct smb_rqst)); |
| rqst.rq_iov = iov; |
| rqst.rq_nvec = n_vec + 1; |
| |
| rc = cifs_send_recv(xid, io_parms->tcon->ses, &rqst, |
| &resp_buftype, flags, &rsp_iov); |
| cifs_small_buf_release(req); |
| rsp = (struct smb2_write_rsp *)rsp_iov.iov_base; |
| |
| if (rc) { |
| trace_smb3_write_err(xid, req->PersistentFileId, |
| io_parms->tcon->tid, |
| io_parms->tcon->ses->Suid, |
| io_parms->offset, io_parms->length, rc); |
| cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE); |
| cifs_dbg(VFS, "Send error in write = %d\n", rc); |
| } else { |
| *nbytes = le32_to_cpu(rsp->DataLength); |
| trace_smb3_write_done(xid, req->PersistentFileId, |
| io_parms->tcon->tid, |
| io_parms->tcon->ses->Suid, |
| io_parms->offset, *nbytes); |
| } |
| |
| free_rsp_buf(resp_buftype, rsp); |
| return rc; |
| } |
| |
| static unsigned int |
| num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size) |
| { |
| int len; |
| unsigned int entrycount = 0; |
| unsigned int next_offset = 0; |
| char *entryptr; |
| FILE_DIRECTORY_INFO *dir_info; |
| |
| if (bufstart == NULL) |
| return 0; |
| |
| entryptr = bufstart; |
| |
| while (1) { |
| if (entryptr + next_offset < entryptr || |
| entryptr + next_offset > end_of_buf || |
| entryptr + next_offset + size > end_of_buf) { |
| cifs_dbg(VFS, "malformed search entry would overflow\n"); |
| break; |
| } |
| |
| entryptr = entryptr + next_offset; |
| dir_info = (FILE_DIRECTORY_INFO *)entryptr; |
| |
| len = le32_to_cpu(dir_info->FileNameLength); |
| if (entryptr + len < entryptr || |
| entryptr + len > end_of_buf || |
| entryptr + len + size > end_of_buf) { |
| cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n", |
| end_of_buf); |
| break; |
| } |
| |
| *lastentry = entryptr; |
| entrycount++; |
| |
| next_offset = le32_to_cpu(dir_info->NextEntryOffset); |
| if (!next_offset) |
| break; |
| } |
| |
| return entrycount; |
| } |
| |
| /* |
| * Readdir/FindFirst |
| */ |
| int |
| SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon, |
| u64 persistent_fid, u64 volatile_fid, int index, |
| struct cifs_search_info *srch_inf) |
| { |
| struct smb_rqst rqst; |
| struct smb2_query_directory_req *req; |
| struct smb2_query_directory_rsp *rsp = NULL; |
| struct kvec iov[2]; |
| struct kvec rsp_iov; |
| int rc = 0; |
| int len; |
| int resp_buftype = CIFS_NO_BUFFER; |
| unsigned char *bufptr; |
| struct TCP_Server_Info *server; |
| struct cifs_ses *ses = tcon->ses; |
| __le16 asteriks = cpu_to_le16('*'); |
| char *end_of_smb; |
| unsigned int output_size = CIFSMaxBufSize; |
| size_t info_buf_size; |
| int flags = 0; |
| unsigned int total_len; |
| |
| if (ses && (ses->server)) |
| server = ses->server; |
| else |
| return -EIO; |
| |
| rc = smb2_plain_req_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req, |
| &total_len); |
| if (rc) |
| return rc; |
| |
| if (smb3_encryption_required(tcon)) |
| flags |= CIFS_TRANSFORM_REQ; |
| |
| switch (srch_inf->info_level) { |
| case SMB_FIND_FILE_DIRECTORY_INFO: |
| req->FileInformationClass = FILE_DIRECTORY_INFORMATION; |
| info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1; |
| break; |
| case SMB_FIND_FILE_ID_FULL_DIR_INFO: |
| req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION; |
| info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1; |
| break; |
| default: |
| cifs_dbg(VFS, "info level %u isn't supported\n", |
| srch_inf->info_level); |
| rc = -EINVAL; |
| goto qdir_exit; |
| } |
| |
| req->FileIndex = cpu_to_le32(index); |
| req->PersistentFileId = persistent_fid; |
| req->VolatileFileId = volatile_fid; |
| |
| len = 0x2; |
| bufptr = req->Buffer; |
| memcpy(bufptr, &asteriks, len); |
| |
| req->FileNameOffset = |
| cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1); |
| req->FileNameLength = cpu_to_le16(len); |
| /* |
| * BB could be 30 bytes or so longer if we used SMB2 specific |
| * buffer lengths, but this is safe and close enough. |
| */ |
| output_size = min_t(unsigned int, output_size, server->maxBuf); |
| output_size = min_t(unsigned int, output_size, 2 << 15); |
| req->OutputBufferLength = cpu_to_le32(output_size); |
| |
| iov[0].iov_base = (char *)req; |
| /* 1 for Buffer */ |
| iov[0].iov_len = total_len - 1; |
| |
| iov[1].iov_base = (char *)(req->Buffer); |
| iov[1].iov_len = len; |
| |
| memset(&rqst, 0, sizeof(struct smb_rqst)); |
| rqst.rq_iov = iov; |
| rqst.rq_nvec = 2; |
| |
| rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov); |
| cifs_small_buf_release(req); |
| rsp = (struct smb2_query_directory_rsp *)rsp_iov.iov_base; |
| |
| if (rc) { |
| if (rc == -ENODATA && |
| rsp->sync_hdr.Status == STATUS_NO_MORE_FILES) { |
| srch_inf->endOfSearch = true; |
| rc = 0; |
| } |
| cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE); |
| goto qdir_exit; |
| } |
| |
| rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), |
| le32_to_cpu(rsp->OutputBufferLength), &rsp_iov, |
| info_buf_size); |
| if (rc) |
| goto qdir_exit; |
| |
| srch_inf->unicode = true; |
| |
| if (srch_inf->ntwrk_buf_start) { |
| if (srch_inf->smallBuf) |
| cifs_small_buf_release(srch_inf->ntwrk_buf_start); |
| else |
| cifs_buf_release(srch_inf->ntwrk_buf_start); |
| } |
| srch_inf->ntwrk_buf_start = (char *)rsp; |
| srch_inf->srch_entries_start = srch_inf->last_entry = |
| (char *)rsp + le16_to_cpu(rsp->OutputBufferOffset); |
| end_of_smb = rsp_iov.iov_len + (char *)rsp; |
| srch_inf->entries_in_buffer = |
| num_entries(srch_inf->srch_entries_start, end_of_smb, |
| &srch_inf->last_entry, info_buf_size); |
| srch_inf->index_of_last_entry += srch_inf->entries_in_buffer; |
| cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n", |
| srch_inf->entries_in_buffer, srch_inf->index_of_last_entry, |
| srch_inf->srch_entries_start, srch_inf->last_entry); |
| if (resp_buftype == CIFS_LARGE_BUFFER) |
| srch_inf->smallBuf = false; |
| else if (resp_buftype == CIFS_SMALL_BUFFER) |
| srch_inf->smallBuf = true; |
| else |
| cifs_dbg(VFS, "illegal search buffer type\n"); |
| |
| return rc; |
| |
| qdir_exit: |
| free_rsp_buf(resp_buftype, rsp); |
| return rc; |
| } |
| |
| int |
| SMB2_set_info_init(struct cifs_tcon *tcon, struct smb_rqst *rqst, |
| u64 persistent_fid, u64 volatile_fid, u32 pid, u8 info_class, |
| u8 info_type, u32 additional_info, |
| void **data, unsigned int *size) |
| { |
| struct smb2_set_info_req *req; |
| struct kvec *iov = rqst->rq_iov; |
| unsigned int i, total_len; |
| int rc; |
| |
| rc = smb2_plain_req_init(SMB2_SET_INFO, tcon, (void **) &req, &total_len); |
| if (rc) |
| return rc; |
| |
| req->sync_hdr.ProcessId = cpu_to_le32(pid); |
| req->InfoType = info_type; |
| req->FileInfoClass = info_class; |
| req->PersistentFileId = persistent_fid; |
| req->VolatileFileId = volatile_fid; |
| req->AdditionalInformation = cpu_to_le32(additional_info); |
| |
| req->BufferOffset = |
| cpu_to_le16(sizeof(struct smb2_set_info_req) - 1); |
| req->BufferLength = cpu_to_le32(*size); |
| |
| memcpy(req->Buffer, *data, *size); |
| total_len += *size; |
| |
| iov[0].iov_base = (char *)req; |
| /* 1 for Buffer */ |
| iov[0].iov_len = total_len - 1; |
| |
| for (i = 1; i < rqst->rq_nvec; i++) { |
| le32_add_cpu(&req->BufferLength, size[i]); |
| iov[i].iov_base = (char *)data[i]; |
| iov[i].iov_len = size[i]; |
| } |
| |
| return 0; |
| } |
| |
| void |
| SMB2_set_info_free(struct smb_rqst *rqst) |
| { |
| if (rqst && rqst->rq_iov) |
| cifs_buf_release(rqst->rq_iov[0].iov_base); /* request */ |
| } |
| |
| static int |
| send_set_info(const unsigned int xid, struct cifs_tcon *tcon, |
| u64 persistent_fid, u64 volatile_fid, u32 pid, u8 info_class, |
| u8 info_type, u32 additional_info, unsigned int num, |
| void **data, unsigned int *size) |
| { |
| struct smb_rqst rqst; |
| struct smb2_set_info_rsp *rsp = NULL; |
| struct kvec *iov; |
| struct kvec rsp_iov; |
| int rc = 0; |
| int resp_buftype; |
| struct cifs_ses *ses = tcon->ses; |
| int flags = 0; |
| |
| if (!ses || !(ses->server)) |
| return -EIO; |
| |
| if (!num) |
| return -EINVAL; |
| |
| if (smb3_encryption_required(tcon)) |
| flags |= CIFS_TRANSFORM_REQ; |
| |
| iov = kmalloc_array(num, sizeof(struct kvec), GFP_KERNEL); |
| if (!iov) |
| return -ENOMEM; |
| |
| memset(&rqst, 0, sizeof(struct smb_rqst)); |
| rqst.rq_iov = iov; |
| rqst.rq_nvec = num; |
| |
| rc = SMB2_set_info_init(tcon, &rqst, persistent_fid, volatile_fid, pid, |
| info_class, info_type, additional_info, |
| data, size); |
| if (rc) { |
| kfree(iov); |
| return rc; |
| } |
| |
| |
| rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, |
| &rsp_iov); |
| SMB2_set_info_free(&rqst); |
| rsp = (struct smb2_set_info_rsp *)rsp_iov.iov_base; |
| |
| if (rc != 0) { |
| cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE); |
| trace_smb3_set_info_err(xid, persistent_fid, tcon->tid, |
| ses->Suid, info_class, (__u32)info_type, rc); |
| } |
| |
| free_rsp_buf(resp_buftype, rsp); |
| kfree(iov); |
| return rc; |
| } |
| |
| int |
| SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, |
| u64 volatile_fid, u32 pid, __le64 *eof) |
| { |
| struct smb2_file_eof_info info; |
| void *data; |
| unsigned int size; |
| |
| info.EndOfFile = *eof; |
| |
| data = &info; |
| size = sizeof(struct smb2_file_eof_info); |
| |
| return send_set_info(xid, tcon, persistent_fid, volatile_fid, |
| pid, FILE_END_OF_FILE_INFORMATION, SMB2_O_INFO_FILE, |
| 0, 1, &data, &size); |
| } |
| |
| int |
| SMB2_set_acl(const unsigned int xid, struct cifs_tcon *tcon, |
| u64 persistent_fid, u64 volatile_fid, |
| struct cifs_ntsd *pnntsd, int pacllen, int aclflag) |
| { |
| return send_set_info(xid, tcon, persistent_fid, volatile_fid, |
| current->tgid, 0, SMB2_O_INFO_SECURITY, aclflag, |
| 1, (void **)&pnntsd, &pacllen); |
| } |
| |
| int |
| SMB2_set_ea(const unsigned int xid, struct cifs_tcon *tcon, |
| u64 persistent_fid, u64 volatile_fid, |
| struct smb2_file_full_ea_info *buf, int len) |
| { |
| return send_set_info(xid, tcon, persistent_fid, volatile_fid, |
| current->tgid, FILE_FULL_EA_INFORMATION, SMB2_O_INFO_FILE, |
| 0, 1, (void **)&buf, &len); |
| } |
| |
| int |
| SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon, |
| const u64 persistent_fid, const u64 volatile_fid, |
| __u8 oplock_level) |
| { |
| struct smb_rqst rqst; |
| int rc; |
| struct smb2_oplock_break *req = NULL; |
| struct cifs_ses *ses = tcon->ses; |
| int flags = CIFS_OBREAK_OP; |
| unsigned int total_len; |
| struct kvec iov[1]; |
| struct kvec rsp_iov; |
| int resp_buf_type; |
| |
| cifs_dbg(FYI, "SMB2_oplock_break\n"); |
| rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req, |
| &total_len); |
| if (rc) |
| return rc; |
| |
| if (smb3_encryption_required(tcon)) |
| flags |= CIFS_TRANSFORM_REQ; |
| |
| req->VolatileFid = volatile_fid; |
| req->PersistentFid = persistent_fid; |
| req->OplockLevel = oplock_level; |
| req->sync_hdr.CreditRequest = cpu_to_le16(1); |
| |
| flags |= CIFS_NO_RESP; |
| |
| iov[0].iov_base = (char *)req; |
| iov[0].iov_len = total_len; |
| |
| memset(&rqst, 0, sizeof(struct smb_rqst)); |
| rqst.rq_iov = iov; |
| rqst.rq_nvec = 1; |
| |
| rc = cifs_send_recv(xid, ses, &rqst, &resp_buf_type, flags, &rsp_iov); |
| cifs_small_buf_release(req); |
| |
| if (rc) { |
| cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE); |
| cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc); |
| } |
| |
| return rc; |
| } |
| |
| void |
| smb2_copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf, |
| struct kstatfs *kst) |
| { |
| kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) * |
| le32_to_cpu(pfs_inf->SectorsPerAllocationUnit); |
| kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits); |
| kst->f_bfree = kst->f_bavail = |
| le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits); |
| return; |
| } |
| |
| static void |
| copy_posix_fs_info_to_kstatfs(FILE_SYSTEM_POSIX_INFO *response_data, |
| struct kstatfs *kst) |
| { |
| kst->f_bsize = le32_to_cpu(response_data->BlockSize); |
| kst->f_blocks = le64_to_cpu(response_data->TotalBlocks); |
| kst->f_bfree = le64_to_cpu(response_data->BlocksAvail); |
| if (response_data->UserBlocksAvail == cpu_to_le64(-1)) |
| kst->f_bavail = kst->f_bfree; |
| else |
| kst->f_bavail = le64_to_cpu(response_data->UserBlocksAvail); |
| if (response_data->TotalFileNodes != cpu_to_le64(-1)) |
| kst->f_files = le64_to_cpu(response_data->TotalFileNodes); |
| if (response_data->FreeFileNodes != cpu_to_le64(-1)) |
| kst->f_ffree = le64_to_cpu(response_data->FreeFileNodes); |
| |
| return; |
| } |
| |
| static int |
| build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level, |
| int outbuf_len, u64 persistent_fid, u64 volatile_fid) |
| { |
| int rc; |
| struct smb2_query_info_req *req; |
| unsigned int total_len; |
| |
| cifs_dbg(FYI, "Query FSInfo level %d\n", level); |
| |
| if ((tcon->ses == NULL) || (tcon->ses->server == NULL)) |
| return -EIO; |
| |
| rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, (void **) &req, |
| &total_len); |
| if (rc) |
| return rc; |
| |
| req->InfoType = SMB2_O_INFO_FILESYSTEM; |
| req->FileInfoClass = level; |
| req->PersistentFileId = persistent_fid; |
| req->VolatileFileId = volatile_fid; |
| /* 1 for pad */ |
| req->InputBufferOffset = |
| cpu_to_le16(sizeof(struct smb2_query_info_req) - 1); |
| req->OutputBufferLength = cpu_to_le32( |
| outbuf_len + sizeof(struct smb2_query_info_rsp) - 1); |
| |
| iov->iov_base = (char *)req; |
| iov->iov_len = total_len; |
| return 0; |
| } |
| |
| int |
| SMB311_posix_qfs_info(const unsigned int xid, struct cifs_tcon *tcon, |
| u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata) |
| { |
| struct smb_rqst rqst; |
| struct smb2_query_info_rsp *rsp = NULL; |
| struct kvec iov; |
| struct kvec rsp_iov; |
| int rc = 0; |
| int resp_buftype; |
| struct cifs_ses *ses = tcon->ses; |
| FILE_SYSTEM_POSIX_INFO *info = NULL; |
| int flags = 0; |
| |
| rc = build_qfs_info_req(&iov, tcon, FS_POSIX_INFORMATION, |
| sizeof(FILE_SYSTEM_POSIX_INFO), |
| persistent_fid, volatile_fid); |
| if (rc) |
| return rc; |
| |
| if (smb3_encryption_required(tcon)) |
| flags |= CIFS_TRANSFORM_REQ; |
| |
| memset(&rqst, 0, sizeof(struct smb_rqst)); |
| rqst.rq_iov = &iov; |
| rqst.rq_nvec = 1; |
| |
| rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov); |
| cifs_small_buf_release(iov.iov_base); |
| if (rc) { |
| cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); |
| goto posix_qfsinf_exit; |
| } |
| rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; |
| |
| info = (FILE_SYSTEM_POSIX_INFO *)( |
| le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp); |
| rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), |
| le32_to_cpu(rsp->OutputBufferLength), &rsp_iov, |
| sizeof(FILE_SYSTEM_POSIX_INFO)); |
| if (!rc) |
| copy_posix_fs_info_to_kstatfs(info, fsdata); |
| |
| posix_qfsinf_exit: |
| free_rsp_buf(resp_buftype, rsp_iov.iov_base); |
| return rc; |
| } |
| |
| int |
| SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon, |
| u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata) |
| { |
| struct smb_rqst rqst; |
| struct smb2_query_info_rsp *rsp = NULL; |
| struct kvec iov; |
| struct kvec rsp_iov; |
| int rc = 0; |
| int resp_buftype; |
| struct cifs_ses *ses = tcon->ses; |
| struct smb2_fs_full_size_info *info = NULL; |
| int flags = 0; |
| |
| rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION, |
| sizeof(struct smb2_fs_full_size_info), |
| persistent_fid, volatile_fid); |
| if (rc) |
| return rc; |
| |
| if (smb3_encryption_required(tcon)) |
| flags |= CIFS_TRANSFORM_REQ; |
| |
| memset(&rqst, 0, sizeof(struct smb_rqst)); |
| rqst.rq_iov = &iov; |
| rqst.rq_nvec = 1; |
| |
| rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov); |
| cifs_small_buf_release(iov.iov_base); |
| if (rc) { |
| cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); |
| goto qfsinf_exit; |
| } |
| rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; |
| |
| info = (struct smb2_fs_full_size_info *)( |
| le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp); |
| rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), |
| le32_to_cpu(rsp->OutputBufferLength), &rsp_iov, |
| sizeof(struct smb2_fs_full_size_info)); |
| if (!rc) |
| smb2_copy_fs_info_to_kstatfs(info, fsdata); |
| |
| qfsinf_exit: |
| free_rsp_buf(resp_buftype, rsp_iov.iov_base); |
| return rc; |
| } |
| |
| int |
| SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon, |
| u64 persistent_fid, u64 volatile_fid, int level) |
| { |
| struct smb_rqst rqst; |
| struct smb2_query_info_rsp *rsp = NULL; |
| struct kvec iov; |
| struct kvec rsp_iov; |
| int rc = 0; |
| int resp_buftype, max_len, min_len; |
| struct cifs_ses *ses = tcon->ses; |
| unsigned int rsp_len, offset; |
| int flags = 0; |
| |
| if (level == FS_DEVICE_INFORMATION) { |
| max_len = sizeof(FILE_SYSTEM_DEVICE_INFO); |
| min_len = sizeof(FILE_SYSTEM_DEVICE_INFO); |
| } else if (level == FS_ATTRIBUTE_INFORMATION) { |
| max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO); |
| min_len = MIN_FS_ATTR_INFO_SIZE; |
| } else if (level == FS_SECTOR_SIZE_INFORMATION) { |
| max_len = sizeof(struct smb3_fs_ss_info); |
| min_len = sizeof(struct smb3_fs_ss_info); |
| } else if (level == FS_VOLUME_INFORMATION) { |
| max_len = sizeof(struct smb3_fs_vol_info) + MAX_VOL_LABEL_LEN; |
| min_len = sizeof(struct smb3_fs_vol_info); |
| } else { |
| cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level); |
| return -EINVAL; |
| } |
| |
| rc = build_qfs_info_req(&iov, tcon, level, max_len, |
| persistent_fid, volatile_fid); |
| if (rc) |
| return rc; |
| |
| if (smb3_encryption_required(tcon)) |
| flags |= CIFS_TRANSFORM_REQ; |
| |
| memset(&rqst, 0, sizeof(struct smb_rqst)); |
| rqst.rq_iov = &iov; |
| rqst.rq_nvec = 1; |
| |
| rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov); |
| cifs_small_buf_release(iov.iov_base); |
| if (rc) { |
| cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); |
| goto qfsattr_exit; |
| } |
| rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; |
| |
| rsp_len = le32_to_cpu(rsp->OutputBufferLength); |
| offset = le16_to_cpu(rsp->OutputBufferOffset); |
| rc = smb2_validate_iov(offset, rsp_len, &rsp_iov, min_len); |
| if (rc) |
| goto qfsattr_exit; |
| |
| if (level == FS_ATTRIBUTE_INFORMATION) |
| memcpy(&tcon->fsAttrInfo, offset |
| + (char *)rsp, min_t(unsigned int, |
| rsp_len, max_len)); |
| else if (level == FS_DEVICE_INFORMATION) |
| memcpy(&tcon->fsDevInfo, offset |
| + (char *)rsp, sizeof(FILE_SYSTEM_DEVICE_INFO)); |
| else if (level == FS_SECTOR_SIZE_INFORMATION) { |
| struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *) |
| (offset + (char *)rsp); |
| tcon->ss_flags = le32_to_cpu(ss_info->Flags); |
| tcon->perf_sector_size = |
| le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf); |
| } else if (level == FS_VOLUME_INFORMATION) { |
| struct smb3_fs_vol_info *vol_info = (struct smb3_fs_vol_info *) |
| (offset + (char *)rsp); |
| tcon->vol_serial_number = vol_info->VolumeSerialNumber; |
| tcon->vol_create_time = vol_info->VolumeCreationTime; |
| } |
| |
| qfsattr_exit: |
| free_rsp_buf(resp_buftype, rsp_iov.iov_base); |
| return rc; |
| } |
| |
| int |
| smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon, |
| const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid, |
| const __u32 num_lock, struct smb2_lock_element *buf) |
| { |
| struct smb_rqst rqst; |
| int rc = 0; |
| struct smb2_lock_req *req = NULL; |
| struct kvec iov[2]; |
| struct kvec rsp_iov; |
| int resp_buf_type; |
| unsigned int count; |
| int flags = CIFS_NO_RESP; |
| unsigned int total_len; |
| |
| cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock); |
| |
| rc = smb2_plain_req_init(SMB2_LOCK, tcon, (void **) &req, &total_len); |
| if (rc) |
| return rc; |
| |
| if (smb3_encryption_required(tcon)) |
| flags |= CIFS_TRANSFORM_REQ; |
| |
| req->sync_hdr.ProcessId = cpu_to_le32(pid); |
| req->LockCount = cpu_to_le16(num_lock); |
| |
| req->PersistentFileId = persist_fid; |
| req->VolatileFileId = volatile_fid; |
| |
| count = num_lock * sizeof(struct smb2_lock_element); |
| |
| iov[0].iov_base = (char *)req; |
| iov[0].iov_len = total_len - sizeof(struct smb2_lock_element); |
| iov[1].iov_base = (char *)buf; |
| iov[1].iov_len = count; |
| |
| cifs_stats_inc(&tcon->stats.cifs_stats.num_locks); |
| |
| memset(&rqst, 0, sizeof(struct smb_rqst)); |
| rqst.rq_iov = iov; |
| rqst.rq_nvec = 2; |
| |
| rc = cifs_send_recv(xid, tcon->ses, &rqst, &resp_buf_type, flags, |
| &rsp_iov); |
| cifs_small_buf_release(req); |
| if (rc) { |
| cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc); |
| cifs_stats_fail_inc(tcon, SMB2_LOCK_HE); |
| trace_smb3_lock_err(xid, persist_fid, tcon->tid, |
| tcon->ses->Suid, rc); |
| } |
| |
| return rc; |
| } |
| |
| int |
| SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon, |
| const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid, |
| const __u64 length, const __u64 offset, const __u32 lock_flags, |
| const bool wait) |
| { |
| struct smb2_lock_element lock; |
| |
| lock.Offset = cpu_to_le64(offset); |
| lock.Length = cpu_to_le64(length); |
| lock.Flags = cpu_to_le32(lock_flags); |
| if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK) |
| lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY); |
| |
| return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock); |
| } |
| |
| int |
| SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon, |
| __u8 *lease_key, const __le32 lease_state) |
| { |
| struct smb_rqst rqst; |
| int rc; |
| struct smb2_lease_ack *req = NULL; |
| struct cifs_ses *ses = tcon->ses; |
| int flags = CIFS_OBREAK_OP; |
| unsigned int total_len; |
| struct kvec iov[1]; |
| struct kvec rsp_iov; |
| int resp_buf_type; |
| __u64 *please_key_high; |
| __u64 *please_key_low; |
| |
| cifs_dbg(FYI, "SMB2_lease_break\n"); |
| rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req, |
| &total_len); |
| if (rc) |
| return rc; |
| |
| if (smb3_encryption_required(tcon)) |
| flags |= CIFS_TRANSFORM_REQ; |
| |
| req->sync_hdr.CreditRequest = cpu_to_le16(1); |
| req->StructureSize = cpu_to_le16(36); |
| total_len += 12; |
| |
| memcpy(req->LeaseKey, lease_key, 16); |
| req->LeaseState = lease_state; |
| |
| flags |= CIFS_NO_RESP; |
| |
| iov[0].iov_base = (char *)req; |
| iov[0].iov_len = total_len; |
| |
| memset(&rqst, 0, sizeof(struct smb_rqst)); |
| rqst.rq_iov = iov; |
| rqst.rq_nvec = 1; |
| |
| rc = cifs_send_recv(xid, ses, &rqst, &resp_buf_type, flags, &rsp_iov); |
| cifs_small_buf_release(req); |
| |
| please_key_low = (__u64 *)req->LeaseKey; |
| please_key_high = (__u64 *)(req->LeaseKey+8); |
| if (rc) { |
| cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE); |
| trace_smb3_lease_err(le32_to_cpu(lease_state), tcon->tid, |
| ses->Suid, *please_key_low, *please_key_high, rc); |
| cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc); |
| } else |
| trace_smb3_lease_done(le32_to_cpu(lease_state), tcon->tid, |
| ses->Suid, *please_key_low, *please_key_high); |
| |
| return rc; |
| } |
