// SPDX-License-Identifier: GPL-2.0 /* * SMB2 version specific operations * * Copyright (c) 2012, Jeff Layton */ #include #include #include #include #include #include #include "cifsglob.h" #include "smb2pdu.h" #include "smb2proto.h" #include "cifsproto.h" #include "cifs_debug.h" #include "cifs_unicode.h" #include "smb2status.h" #include "smb2glob.h" #include "cifs_ioctl.h" #include "smbdirect.h" /* Change credits for different ops and return the total number of credits */ static int change_conf(struct TCP_Server_Info *server) { server->credits += server->echo_credits + server->oplock_credits; server->oplock_credits = server->echo_credits = 0; switch (server->credits) { case 0: return 0; case 1: server->echoes = false; server->oplocks = false; break; case 2: server->echoes = true; server->oplocks = false; server->echo_credits = 1; break; default: server->echoes = true; if (enable_oplocks) { server->oplocks = true; server->oplock_credits = 1; } else server->oplocks = false; server->echo_credits = 1; } server->credits -= server->echo_credits + server->oplock_credits; return server->credits + server->echo_credits + server->oplock_credits; } static void smb2_add_credits(struct TCP_Server_Info *server, const struct cifs_credits *credits, const int optype) { int *val, rc = -1; unsigned int add = credits->value; unsigned int instance = credits->instance; bool reconnect_detected = false; spin_lock(&server->req_lock); val = server->ops->get_credits_field(server, optype); /* eg found case where write overlapping reconnect messed up credits */ if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0)) trace_smb3_reconnect_with_invalid_credits(server->CurrentMid, server->hostname, *val); if ((instance == 0) || (instance == server->reconnect_instance)) *val += add; else reconnect_detected = true; if (*val > 65000) { *val = 65000; /* Don't get near 64K credits, avoid srv bugs */ printk_once(KERN_WARNING "server overflowed SMB3 credits\n"); } server->in_flight--; if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP) rc = change_conf(server); /* * Sometimes server returns 0 credits on oplock break ack - we need to * rebalance credits in this case. */ else if (server->in_flight > 0 && server->oplock_credits == 0 && server->oplocks) { if (server->credits > 1) { server->credits--; server->oplock_credits++; } } spin_unlock(&server->req_lock); wake_up(&server->request_q); if (reconnect_detected) cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n", add, instance); if (server->tcpStatus == CifsNeedReconnect || server->tcpStatus == CifsExiting) return; switch (rc) { case -1: /* change_conf hasn't been executed */ break; case 0: cifs_dbg(VFS, "Possible client or server bug - zero credits\n"); break; case 1: cifs_dbg(VFS, "disabling echoes and oplocks\n"); break; case 2: cifs_dbg(FYI, "disabling oplocks\n"); break; default: cifs_dbg(FYI, "add %u credits total=%d\n", add, rc); } } static void smb2_set_credits(struct TCP_Server_Info *server, const int val) { spin_lock(&server->req_lock); server->credits = val; if (val == 1) server->reconnect_instance++; spin_unlock(&server->req_lock); /* don't log while holding the lock */ if (val == 1) cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n"); } static int * smb2_get_credits_field(struct TCP_Server_Info *server, const int optype) { switch (optype) { case CIFS_ECHO_OP: return &server->echo_credits; case CIFS_OBREAK_OP: return &server->oplock_credits; default: return &server->credits; } } static unsigned int smb2_get_credits(struct mid_q_entry *mid) { struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)mid->resp_buf; if (mid->mid_state == MID_RESPONSE_RECEIVED || mid->mid_state == MID_RESPONSE_MALFORMED) return le16_to_cpu(shdr->CreditRequest); return 0; } static int smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size, unsigned int *num, struct cifs_credits *credits) { int rc = 0; unsigned int scredits; spin_lock(&server->req_lock); while (1) { if (server->credits <= 0) { spin_unlock(&server->req_lock); cifs_num_waiters_inc(server); rc = wait_event_killable(server->request_q, has_credits(server, &server->credits, 1)); cifs_num_waiters_dec(server); if (rc) return rc; spin_lock(&server->req_lock); } else { if (server->tcpStatus == CifsExiting) { spin_unlock(&server->req_lock); return -ENOENT; } scredits = server->credits; /* can deadlock with reopen */ if (scredits <= 8) { *num = SMB2_MAX_BUFFER_SIZE; credits->value = 0; credits->instance = 0; break; } /* leave some credits for reopen and other ops */ scredits -= 8; *num = min_t(unsigned int, size, scredits * SMB2_MAX_BUFFER_SIZE); credits->value = DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE); credits->instance = server->reconnect_instance; server->credits -= credits->value; server->in_flight++; break; } } spin_unlock(&server->req_lock); return rc; } static int smb2_adjust_credits(struct TCP_Server_Info *server, struct cifs_credits *credits, const unsigned int payload_size) { int new_val = DIV_ROUND_UP(payload_size, SMB2_MAX_BUFFER_SIZE); if (!credits->value || credits->value == new_val) return 0; if (credits->value < new_val) { WARN_ONCE(1, "request has less credits (%d) than required (%d)", credits->value, new_val); return -ENOTSUPP; } spin_lock(&server->req_lock); if (server->reconnect_instance != credits->instance) { spin_unlock(&server->req_lock); cifs_dbg(VFS, "trying to return %d credits to old session\n", credits->value - new_val); return -EAGAIN; } server->credits += credits->value - new_val; spin_unlock(&server->req_lock); wake_up(&server->request_q); credits->value = new_val; return 0; } static __u64 smb2_get_next_mid(struct TCP_Server_Info *server) { __u64 mid; /* for SMB2 we need the current value */ spin_lock(&GlobalMid_Lock); mid = server->CurrentMid++; spin_unlock(&GlobalMid_Lock); return mid; } static void smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val) { spin_lock(&GlobalMid_Lock); if (server->CurrentMid >= val) server->CurrentMid -= val; spin_unlock(&GlobalMid_Lock); } static struct mid_q_entry * smb2_find_mid(struct TCP_Server_Info *server, char *buf) { struct mid_q_entry *mid; struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf; __u64 wire_mid = le64_to_cpu(shdr->MessageId); if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) { cifs_dbg(VFS, "Encrypted frame parsing not supported yet\n"); return NULL; } spin_lock(&GlobalMid_Lock); list_for_each_entry(mid, &server->pending_mid_q, qhead) { if ((mid->mid == wire_mid) && (mid->mid_state == MID_REQUEST_SUBMITTED) && (mid->command == shdr->Command)) { kref_get(&mid->refcount); spin_unlock(&GlobalMid_Lock); return mid; } } spin_unlock(&GlobalMid_Lock); return NULL; } static void smb2_dump_detail(void *buf, struct TCP_Server_Info *server) { #ifdef CONFIG_CIFS_DEBUG2 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf; cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n", shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId, shdr->ProcessId); cifs_dbg(VFS, "smb buf %p len %u\n", buf, server->ops->calc_smb_size(buf, server)); #endif } static bool smb2_need_neg(struct TCP_Server_Info *server) { return server->max_read == 0; } static int smb2_negotiate(const unsigned int xid, struct cifs_ses *ses) { int rc; ses->server->CurrentMid = 0; rc = SMB2_negotiate(xid, ses); /* BB we probably don't need to retry with modern servers */ if (rc == -EAGAIN) rc = -EHOSTDOWN; return rc; } static unsigned int smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info) { struct TCP_Server_Info *server = tcon->ses->server; unsigned int wsize; /* start with specified wsize, or default */ wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE; wsize = min_t(unsigned int, wsize, server->max_write); #ifdef CONFIG_CIFS_SMB_DIRECT if (server->rdma) { if (server->sign) wsize = min_t(unsigned int, wsize, server->smbd_conn->max_fragmented_send_size); else wsize = min_t(unsigned int, wsize, server->smbd_conn->max_readwrite_size); } #endif if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE); return wsize; } static unsigned int smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info) { struct TCP_Server_Info *server = tcon->ses->server; unsigned int wsize; /* start with specified wsize, or default */ wsize = volume_info->wsize ? volume_info->wsize : SMB3_DEFAULT_IOSIZE; wsize = min_t(unsigned int, wsize, server->max_write); #ifdef CONFIG_CIFS_SMB_DIRECT if (server->rdma) { if (server->sign) wsize = min_t(unsigned int, wsize, server->smbd_conn->max_fragmented_send_size); else wsize = min_t(unsigned int, wsize, server->smbd_conn->max_readwrite_size); } #endif if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE); return wsize; } static unsigned int smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info) { struct TCP_Server_Info *server = tcon->ses->server; unsigned int rsize; /* start with specified rsize, or default */ rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE; rsize = min_t(unsigned int, rsize, server->max_read); #ifdef CONFIG_CIFS_SMB_DIRECT if (server->rdma) { if (server->sign) rsize = min_t(unsigned int, rsize, server->smbd_conn->max_fragmented_recv_size); else rsize = min_t(unsigned int, rsize, server->smbd_conn->max_readwrite_size); } #endif if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE); return rsize; } static unsigned int smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info) { struct TCP_Server_Info *server = tcon->ses->server; unsigned int rsize; /* start with specified rsize, or default */ rsize = volume_info->rsize ? volume_info->rsize : SMB3_DEFAULT_IOSIZE; rsize = min_t(unsigned int, rsize, server->max_read); #ifdef CONFIG_CIFS_SMB_DIRECT if (server->rdma) { if (server->sign) rsize = min_t(unsigned int, rsize, server->smbd_conn->max_fragmented_recv_size); else rsize = min_t(unsigned int, rsize, server->smbd_conn->max_readwrite_size); } #endif if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE); return rsize; } static int parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf, size_t buf_len, struct cifs_server_iface **iface_list, size_t *iface_count) { struct network_interface_info_ioctl_rsp *p; struct sockaddr_in *addr4; struct sockaddr_in6 *addr6; struct iface_info_ipv4 *p4; struct iface_info_ipv6 *p6; struct cifs_server_iface *info; ssize_t bytes_left; size_t next = 0; int nb_iface = 0; int rc = 0; *iface_list = NULL; *iface_count = 0; /* * Fist pass: count and sanity check */ bytes_left = buf_len; p = buf; while (bytes_left >= sizeof(*p)) { nb_iface++; next = le32_to_cpu(p->Next); if (!next) { bytes_left -= sizeof(*p); break; } p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next); bytes_left -= next; } if (!nb_iface) { cifs_dbg(VFS, "%s: malformed interface info\n", __func__); rc = -EINVAL; goto out; } if (bytes_left || p->Next) cifs_dbg(VFS, "%s: incomplete interface info\n", __func__); /* * Second pass: extract info to internal structure */ *iface_list = kcalloc(nb_iface, sizeof(**iface_list), GFP_KERNEL); if (!*iface_list) { rc = -ENOMEM; goto out; } info = *iface_list; bytes_left = buf_len; p = buf; while (bytes_left >= sizeof(*p)) { info->speed = le64_to_cpu(p->LinkSpeed); info->rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE); info->rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE); cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, *iface_count); cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed); cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__, le32_to_cpu(p->Capability)); switch (p->Family) { /* * The kernel and wire socket structures have the same * layout and use network byte order but make the * conversion explicit in case either one changes. */ case INTERNETWORK: addr4 = (struct sockaddr_in *)&info->sockaddr; p4 = (struct iface_info_ipv4 *)p->Buffer; addr4->sin_family = AF_INET; memcpy(&addr4->sin_addr, &p4->IPv4Address, 4); /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */ addr4->sin_port = cpu_to_be16(CIFS_PORT); cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__, &addr4->sin_addr); break; case INTERNETWORKV6: addr6 = (struct sockaddr_in6 *)&info->sockaddr; p6 = (struct iface_info_ipv6 *)p->Buffer; addr6->sin6_family = AF_INET6; memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16); /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */ addr6->sin6_flowinfo = 0; addr6->sin6_scope_id = 0; addr6->sin6_port = cpu_to_be16(CIFS_PORT); cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__, &addr6->sin6_addr); break; default: cifs_dbg(VFS, "%s: skipping unsupported socket family\n", __func__); goto next_iface; } (*iface_count)++; info++; next_iface: next = le32_to_cpu(p->Next); if (!next) break; p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next); bytes_left -= next; } if (!*iface_count) { rc = -EINVAL; goto out; } out: if (rc) { kfree(*iface_list); *iface_count = 0; *iface_list = NULL; } return rc; } static int SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon) { int rc; unsigned int ret_data_len = 0; struct network_interface_info_ioctl_rsp *out_buf = NULL; struct cifs_server_iface *iface_list; size_t iface_count; struct cifs_ses *ses = tcon->ses; rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID, FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */, NULL /* no data input */, 0 /* no data input */, CIFSMaxBufSize, (char **)&out_buf, &ret_data_len); if (rc == -EOPNOTSUPP) { cifs_dbg(FYI, "server does not support query network interfaces\n"); goto out; } else if (rc != 0) { cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc); goto out; } rc = parse_server_interfaces(out_buf, ret_data_len, &iface_list, &iface_count); if (rc) goto out; spin_lock(&ses->iface_lock); kfree(ses->iface_list); ses->iface_list = iface_list; ses->iface_count = iface_count; ses->iface_last_update = jiffies; spin_unlock(&ses->iface_lock); out: kfree(out_buf); return rc; } static void smb2_close_cached_fid(struct kref *ref) { struct cached_fid *cfid = container_of(ref, struct cached_fid, refcount); if (cfid->is_valid) { cifs_dbg(FYI, "clear cached root file handle\n"); SMB2_close(0, cfid->tcon, cfid->fid->persistent_fid, cfid->fid->volatile_fid); cfid->is_valid = false; cfid->file_all_info_is_valid = false; } } void close_shroot(struct cached_fid *cfid) { mutex_lock(&cfid->fid_mutex); kref_put(&cfid->refcount, smb2_close_cached_fid); mutex_unlock(&cfid->fid_mutex); } void smb2_cached_lease_break(struct work_struct *work) { struct cached_fid *cfid = container_of(work, struct cached_fid, lease_break); close_shroot(cfid); } /* * Open the directory at the root of a share */ int open_shroot(unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *pfid) { struct cifs_ses *ses = tcon->ses; struct TCP_Server_Info *server = ses->server; struct cifs_open_parms oparms; struct smb2_create_rsp *o_rsp = NULL; struct smb2_query_info_rsp *qi_rsp = NULL; int resp_buftype[2]; struct smb_rqst rqst[2]; struct kvec rsp_iov[2]; struct kvec open_iov[SMB2_CREATE_IOV_SIZE]; struct kvec qi_iov[1]; int rc, flags = 0; __le16 utf16_path = 0; /* Null - since an open of top of share */ u8 oplock = SMB2_OPLOCK_LEVEL_II; mutex_lock(&tcon->crfid.fid_mutex); if (tcon->crfid.is_valid) { cifs_dbg(FYI, "found a cached root file handle\n"); memcpy(pfid, tcon->crfid.fid, sizeof(struct cifs_fid)); kref_get(&tcon->crfid.refcount); mutex_unlock(&tcon->crfid.fid_mutex); return 0; } if (smb3_encryption_required(tcon)) flags |= CIFS_TRANSFORM_REQ; memset(rqst, 0, sizeof(rqst)); resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER; memset(rsp_iov, 0, sizeof(rsp_iov)); /* Open */ memset(&open_iov, 0, sizeof(open_iov)); rqst[0].rq_iov = open_iov; rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; oparms.tcon = tcon; oparms.create_options = 0; oparms.desired_access = FILE_READ_ATTRIBUTES; oparms.disposition = FILE_OPEN; oparms.fid = pfid; oparms.reconnect = false; rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, &utf16_path); if (rc) goto oshr_exit; smb2_set_next_command(tcon, &rqst[0]); memset(&qi_iov, 0, sizeof(qi_iov)); rqst[1].rq_iov = qi_iov; rqst[1].rq_nvec = 1; rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID, COMPOUND_FID, FILE_ALL_INFORMATION, SMB2_O_INFO_FILE, 0, sizeof(struct smb2_file_all_info) + PATH_MAX * 2, 0, NULL); if (rc) goto oshr_exit; smb2_set_related(&rqst[1]); rc = compound_send_recv(xid, ses, flags, 2, rqst, resp_buftype, rsp_iov); if (rc) goto oshr_exit; o_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base; oparms.fid->persistent_fid = o_rsp->PersistentFileId; oparms.fid->volatile_fid = o_rsp->VolatileFileId; #ifdef CONFIG_CIFS_DEBUG2 oparms.fid->mid = le64_to_cpu(o_rsp->sync_hdr.MessageId); #endif /* CIFS_DEBUG2 */ memcpy(tcon->crfid.fid, pfid, sizeof(struct cifs_fid)); tcon->crfid.tcon = tcon; tcon->crfid.is_valid = true; kref_init(&tcon->crfid.refcount); if (o_rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE) { kref_get(&tcon->crfid.refcount); oplock = smb2_parse_lease_state(server, o_rsp, &oparms.fid->epoch, oparms.fid->lease_key); } else goto oshr_exit; qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base; if (le32_to_cpu(qi_rsp->OutputBufferLength) < sizeof(struct smb2_file_all_info)) goto oshr_exit; if (!smb2_validate_and_copy_iov( le16_to_cpu(qi_rsp->OutputBufferOffset), sizeof(struct smb2_file_all_info), &rsp_iov[1], sizeof(struct smb2_file_all_info), (char *)&tcon->crfid.file_all_info)) tcon->crfid.file_all_info_is_valid = 1; oshr_exit: mutex_unlock(&tcon->crfid.fid_mutex); SMB2_open_free(&rqst[0]); SMB2_query_info_free(&rqst[1]); free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); return rc; } static void smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon) { int rc; __le16 srch_path = 0; /* Null - open root of share */ u8 oplock = SMB2_OPLOCK_LEVEL_NONE; struct cifs_open_parms oparms; struct cifs_fid fid; bool no_cached_open = tcon->nohandlecache; oparms.tcon = tcon; oparms.desired_access = FILE_READ_ATTRIBUTES; oparms.disposition = FILE_OPEN; oparms.create_options = 0; oparms.fid = &fid; oparms.reconnect = false; if (no_cached_open) rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL); else rc = open_shroot(xid, tcon, &fid); if (rc) return; SMB3_request_interfaces(xid, tcon); SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, FS_ATTRIBUTE_INFORMATION); SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, FS_DEVICE_INFORMATION); SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, FS_VOLUME_INFORMATION); SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */ if (no_cached_open) SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); else close_shroot(&tcon->crfid); } static void smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon) { int rc; __le16 srch_path = 0; /* Null - open root of share */ u8 oplock = SMB2_OPLOCK_LEVEL_NONE; struct cifs_open_parms oparms; struct cifs_fid fid; oparms.tcon = tcon; oparms.desired_access = FILE_READ_ATTRIBUTES; oparms.disposition = FILE_OPEN; oparms.create_options = 0; oparms.fid = &fid; oparms.reconnect = false; rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL); if (rc) return; SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, FS_ATTRIBUTE_INFORMATION); SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, FS_DEVICE_INFORMATION); SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); } static int smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon, struct cifs_sb_info *cifs_sb, const char *full_path) { int rc; __le16 *utf16_path; __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; struct cifs_open_parms oparms; struct cifs_fid fid; if ((*full_path == 0) && tcon->crfid.is_valid) return 0; utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb); if (!utf16_path) return -ENOMEM; oparms.tcon = tcon; oparms.desired_access = FILE_READ_ATTRIBUTES; oparms.disposition = FILE_OPEN; if (backup_cred(cifs_sb)) oparms.create_options = CREATE_OPEN_BACKUP_INTENT; else oparms.create_options = 0; oparms.fid = &fid; oparms.reconnect = false; rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL); if (rc) { kfree(utf16_path); return rc; } rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); kfree(utf16_path); return rc; } static int smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon, struct cifs_sb_info *cifs_sb, const char *full_path, u64 *uniqueid, FILE_ALL_INFO *data) { *uniqueid = le64_to_cpu(data->IndexNumber); return 0; } static int smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *fid, FILE_ALL_INFO *data) { int rc; struct smb2_file_all_info *smb2_data; smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2, GFP_KERNEL); if (smb2_data == NULL) return -ENOMEM; rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid, smb2_data); if (!rc) move_smb2_info_to_cifs(data, smb2_data); kfree(smb2_data); return rc; } #ifdef CONFIG_CIFS_XATTR static ssize_t move_smb2_ea_to_cifs(char *dst, size_t dst_size, struct smb2_file_full_ea_info *src, size_t src_size, const unsigned char *ea_name) { int rc = 0; unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0; char *name, *value; size_t buf_size = dst_size; size_t name_len, value_len, user_name_len; while (src_size > 0) { name = &src->ea_data[0]; name_len = (size_t)src->ea_name_length; value = &src->ea_data[src->ea_name_length + 1]; value_len = (size_t)le16_to_cpu(src->ea_value_length); if (name_len == 0) break; if (src_size < 8 + name_len + 1 + value_len) { cifs_dbg(FYI, "EA entry goes beyond length of list\n"); rc = -EIO; goto out; } if (ea_name) { if (ea_name_len == name_len && memcmp(ea_name, name, name_len) == 0) { rc = value_len; if (dst_size == 0) goto out; if (dst_size < value_len) { rc = -ERANGE; goto out; } memcpy(dst, value, value_len); goto out; } } else { /* 'user.' plus a terminating null */ user_name_len = 5 + 1 + name_len; if (buf_size == 0) { /* skip copy - calc size only */ rc += user_name_len; } else if (dst_size >= user_name_len) { dst_size -= user_name_len; memcpy(dst, "user.", 5); dst += 5; memcpy(dst, src->ea_data, name_len); dst += name_len; *dst = 0; ++dst; rc += user_name_len; } else { /* stop before overrun buffer */ rc = -ERANGE; break; } } if (!src->next_entry_offset) break; if (src_size < le32_to_cpu(src->next_entry_offset)) { /* stop before overrun buffer */ rc = -ERANGE; break; } src_size -= le32_to_cpu(src->next_entry_offset); src = (void *)((char *)src + le32_to_cpu(src->next_entry_offset)); } /* didn't find the named attribute */ if (ea_name) rc = -ENODATA; out: return (ssize_t)rc; } static ssize_t smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon, const unsigned char *path, const unsigned char *ea_name, char *ea_data, size_t buf_size, struct cifs_sb_info *cifs_sb) { int rc; __le16 *utf16_path; struct kvec rsp_iov = {NULL, 0}; int buftype = CIFS_NO_BUFFER; struct smb2_query_info_rsp *rsp; struct smb2_file_full_ea_info *info = NULL; utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); if (!utf16_path) return -ENOMEM; rc = smb2_query_info_compound(xid, tcon, utf16_path, FILE_READ_EA, FILE_FULL_EA_INFORMATION, SMB2_O_INFO_FILE, CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE - MAX_SMB2_CLOSE_RESPONSE_SIZE, &rsp_iov, &buftype, cifs_sb); if (rc) { /* * If ea_name is NULL (listxattr) and there are no EAs, * return 0 as it's not an error. Otherwise, the specified * ea_name was not found. */ if (!ea_name && rc == -ENODATA) rc = 0; goto qeas_exit; } rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), le32_to_cpu(rsp->OutputBufferLength), &rsp_iov, sizeof(struct smb2_file_full_ea_info)); if (rc) goto qeas_exit; info = (struct smb2_file_full_ea_info *)( le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp); rc = move_smb2_ea_to_cifs(ea_data, buf_size, info, le32_to_cpu(rsp->OutputBufferLength), ea_name); qeas_exit: kfree(utf16_path); free_rsp_buf(buftype, rsp_iov.iov_base); return rc; } static int smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon, const char *path, const char *ea_name, const void *ea_value, const __u16 ea_value_len, const struct nls_table *nls_codepage, struct cifs_sb_info *cifs_sb) { struct cifs_ses *ses = tcon->ses; __le16 *utf16_path = NULL; int ea_name_len = strlen(ea_name); int flags = 0; int len; struct smb_rqst rqst[3]; int resp_buftype[3]; struct kvec rsp_iov[3]; struct kvec open_iov[SMB2_CREATE_IOV_SIZE]; struct cifs_open_parms oparms; __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; struct cifs_fid fid; struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE]; unsigned int size[1]; void *data[1]; struct smb2_file_full_ea_info *ea = NULL; struct kvec close_iov[1]; int rc; if (smb3_encryption_required(tcon)) flags |= CIFS_TRANSFORM_REQ; if (ea_name_len > 255) return -EINVAL; utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); if (!utf16_path) return -ENOMEM; memset(rqst, 0, sizeof(rqst)); resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; memset(rsp_iov, 0, sizeof(rsp_iov)); if (ses->server->ops->query_all_EAs) { if (!ea_value) { rc = ses->server->ops->query_all_EAs(xid, tcon, path, ea_name, NULL, 0, cifs_sb); if (rc == -ENODATA) goto sea_exit; } } /* Open */ memset(&open_iov, 0, sizeof(open_iov)); rqst[0].rq_iov = open_iov; rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; memset(&oparms, 0, sizeof(oparms)); oparms.tcon = tcon; oparms.desired_access = FILE_WRITE_EA; oparms.disposition = FILE_OPEN; if (backup_cred(cifs_sb)) oparms.create_options = CREATE_OPEN_BACKUP_INTENT; else oparms.create_options = 0; oparms.fid = &fid; oparms.reconnect = false; rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path); if (rc) goto sea_exit; smb2_set_next_command(tcon, &rqst[0]); /* Set Info */ memset(&si_iov, 0, sizeof(si_iov)); rqst[1].rq_iov = si_iov; rqst[1].rq_nvec = 1; len = sizeof(ea) + ea_name_len + ea_value_len + 1; ea = kzalloc(len, GFP_KERNEL); if (ea == NULL) { rc = -ENOMEM; goto sea_exit; } ea->ea_name_length = ea_name_len; ea->ea_value_length = cpu_to_le16(ea_value_len); memcpy(ea->ea_data, ea_name, ea_name_len + 1); memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len); size[0] = len; data[0] = ea; rc = SMB2_set_info_init(tcon, &rqst[1], COMPOUND_FID, COMPOUND_FID, current->tgid, FILE_FULL_EA_INFORMATION, SMB2_O_INFO_FILE, 0, data, size); smb2_set_next_command(tcon, &rqst[1]); smb2_set_related(&rqst[1]); /* Close */ memset(&close_iov, 0, sizeof(close_iov)); rqst[2].rq_iov = close_iov; rqst[2].rq_nvec = 1; rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID); smb2_set_related(&rqst[2]); rc = compound_send_recv(xid, ses, flags, 3, rqst, resp_buftype, rsp_iov); sea_exit: kfree(ea); kfree(utf16_path); SMB2_open_free(&rqst[0]); SMB2_set_info_free(&rqst[1]); SMB2_close_free(&rqst[2]); free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); return rc; } #endif static bool smb2_can_echo(struct TCP_Server_Info *server) { return server->echoes; } static void smb2_clear_stats(struct cifs_tcon *tcon) { int i; for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) { atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0); atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0); } } static void smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon) { seq_puts(m, "\n\tShare Capabilities:"); if (tcon->capabilities & SMB2_SHARE_CAP_DFS) seq_puts(m, " DFS,"); if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY) seq_puts(m, " CONTINUOUS AVAILABILITY,"); if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT) seq_puts(m, " SCALEOUT,"); if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER) seq_puts(m, " CLUSTER,"); if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC) seq_puts(m, " ASYMMETRIC,"); if (tcon->capabilities == 0) seq_puts(m, " None"); if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE) seq_puts(m, " Aligned,"); if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE) seq_puts(m, " Partition Aligned,"); if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY) seq_puts(m, " SSD,"); if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED) seq_puts(m, " TRIM-support,"); seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags); seq_printf(m, "\n\ttid: 0x%x", tcon->tid); if (tcon->perf_sector_size) seq_printf(m, "\tOptimal sector size: 0x%x", tcon->perf_sector_size); seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access); } static void smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon) { atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent; atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed; /* * Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO * totals (requests sent) since those SMBs are per-session not per tcon */ seq_printf(m, "\nBytes read: %llu Bytes written: %llu", (long long)(tcon->bytes_read), (long long)(tcon->bytes_written)); seq_printf(m, "\nOpen files: %d total (local), %d open on server", atomic_read(&tcon->num_local_opens), atomic_read(&tcon->num_remote_opens)); seq_printf(m, "\nTreeConnects: %d total %d failed", atomic_read(&sent[SMB2_TREE_CONNECT_HE]), atomic_read(&failed[SMB2_TREE_CONNECT_HE])); seq_printf(m, "\nTreeDisconnects: %d total %d failed", atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]), atomic_read(&failed[SMB2_TREE_DISCONNECT_HE])); seq_printf(m, "\nCreates: %d total %d failed", atomic_read(&sent[SMB2_CREATE_HE]), atomic_read(&failed[SMB2_CREATE_HE])); seq_printf(m, "\nCloses: %d total %d failed", atomic_read(&sent[SMB2_CLOSE_HE]), atomic_read(&failed[SMB2_CLOSE_HE])); seq_printf(m, "\nFlushes: %d total %d failed", atomic_read(&sent[SMB2_FLUSH_HE]), atomic_read(&failed[SMB2_FLUSH_HE])); seq_printf(m, "\nReads: %d total %d failed", atomic_read(&sent[SMB2_READ_HE]), atomic_read(&failed[SMB2_READ_HE])); seq_printf(m, "\nWrites: %d total %d failed", atomic_read(&sent[SMB2_WRITE_HE]), atomic_read(&failed[SMB2_WRITE_HE])); seq_printf(m, "\nLocks: %d total %d failed", atomic_read(&sent[SMB2_LOCK_HE]), atomic_read(&failed[SMB2_LOCK_HE])); seq_printf(m, "\nIOCTLs: %d total %d failed", atomic_read(&sent[SMB2_IOCTL_HE]), atomic_read(&failed[SMB2_IOCTL_HE])); seq_printf(m, "\nQueryDirectories: %d total %d failed", atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]), atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE])); seq_printf(m, "\nChangeNotifies: %d total %d failed", atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]), atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE])); seq_printf(m, "\nQueryInfos: %d total %d failed", atomic_read(&sent[SMB2_QUERY_INFO_HE]), atomic_read(&failed[SMB2_QUERY_INFO_HE])); seq_printf(m, "\nSetInfos: %d total %d failed", atomic_read(&sent[SMB2_SET_INFO_HE]), atomic_read(&failed[SMB2_SET_INFO_HE])); seq_printf(m, "\nOplockBreaks: %d sent %d failed", atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]), atomic_read(&failed[SMB2_OPLOCK_BREAK_HE])); } static void smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock) { struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry)); struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server; cfile->fid.persistent_fid = fid->persistent_fid; cfile->fid.volatile_fid = fid->volatile_fid; #ifdef CONFIG_CIFS_DEBUG2 cfile->fid.mid = fid->mid; #endif /* CIFS_DEBUG2 */ server->ops->set_oplock_level(cinode, oplock, fid->epoch, &fid->purge_cache); cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode); memcpy(cfile->fid.create_guid, fid->create_guid, 16); } static void smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *fid) { SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); } static int SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, u64 volatile_fid, struct copychunk_ioctl *pcchunk) { int rc; unsigned int ret_data_len; struct resume_key_req *res_key; rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid, FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */, NULL, 0 /* no input */, CIFSMaxBufSize, (char **)&res_key, &ret_data_len); if (rc) { cifs_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc); goto req_res_key_exit; } if (ret_data_len < sizeof(struct resume_key_req)) { cifs_dbg(VFS, "Invalid refcopy resume key length\n"); rc = -EINVAL; goto req_res_key_exit; } memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE); req_res_key_exit: kfree(res_key); return rc; } static int smb2_ioctl_query_info(const unsigned int xid, struct cifs_tcon *tcon, __le16 *path, int is_dir, unsigned long p) { struct cifs_ses *ses = tcon->ses; char __user *arg = (char __user *)p; struct smb_query_info qi; struct smb_query_info __user *pqi; int rc = 0; int flags = 0; struct smb2_query_info_rsp *qi_rsp = NULL; struct smb2_ioctl_rsp *io_rsp = NULL; void *buffer = NULL; struct smb_rqst rqst[3]; int resp_buftype[3]; struct kvec rsp_iov[3]; struct kvec open_iov[SMB2_CREATE_IOV_SIZE]; struct cifs_open_parms oparms; u8 oplock = SMB2_OPLOCK_LEVEL_NONE; struct cifs_fid fid; struct kvec qi_iov[1]; struct kvec io_iov[SMB2_IOCTL_IOV_SIZE]; struct kvec close_iov[1]; memset(rqst, 0, sizeof(rqst)); resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; memset(rsp_iov, 0, sizeof(rsp_iov)); if (copy_from_user(&qi, arg, sizeof(struct smb_query_info))) return -EFAULT; if (qi.output_buffer_length > 1024) return -EINVAL; if (!ses || !(ses->server)) return -EIO; if (smb3_encryption_required(tcon)) flags |= CIFS_TRANSFORM_REQ; buffer = kmalloc(qi.output_buffer_length, GFP_KERNEL); if (buffer == NULL) return -ENOMEM; if (copy_from_user(buffer, arg + sizeof(struct smb_query_info), qi.output_buffer_length)) { rc = -EFAULT; goto iqinf_exit; } /* Open */ memset(&open_iov, 0, sizeof(open_iov)); rqst[0].rq_iov = open_iov; rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; memset(&oparms, 0, sizeof(oparms)); oparms.tcon = tcon; oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL; oparms.disposition = FILE_OPEN; if (is_dir) oparms.create_options = CREATE_NOT_FILE; else oparms.create_options = CREATE_NOT_DIR; oparms.fid = &fid; oparms.reconnect = false; /* * FSCTL codes encode the special access they need in the fsctl code. */ if (qi.flags & PASSTHRU_FSCTL) { switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) { case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS: oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE; break; case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS: oparms.desired_access = GENERIC_ALL; break; case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS: oparms.desired_access = GENERIC_READ; break; case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS: oparms.desired_access = GENERIC_WRITE; break; } } rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, path); if (rc) goto iqinf_exit; smb2_set_next_command(tcon, &rqst[0]); /* Query */ if (qi.flags & PASSTHRU_FSCTL) { /* Can eventually relax perm check since server enforces too */ if (!capable(CAP_SYS_ADMIN)) rc = -EPERM; else { memset(&io_iov, 0, sizeof(io_iov)); rqst[1].rq_iov = io_iov; rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE; rc = SMB2_ioctl_init(tcon, &rqst[1], COMPOUND_FID, COMPOUND_FID, qi.info_type, true, buffer, qi.output_buffer_length, CIFSMaxBufSize); } } else if (qi.flags == PASSTHRU_QUERY_INFO) { memset(&qi_iov, 0, sizeof(qi_iov)); rqst[1].rq_iov = qi_iov; rqst[1].rq_nvec = 1; rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID, COMPOUND_FID, qi.file_info_class, qi.info_type, qi.additional_information, qi.input_buffer_length, qi.output_buffer_length, buffer); } else { /* unknown flags */ cifs_dbg(VFS, "invalid passthru query flags: 0x%x\n", qi.flags); rc = -EINVAL; } if (rc) goto iqinf_exit; smb2_set_next_command(tcon, &rqst[1]); smb2_set_related(&rqst[1]); /* Close */ memset(&close_iov, 0, sizeof(close_iov)); rqst[2].rq_iov = close_iov; rqst[2].rq_nvec = 1; rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID); if (rc) goto iqinf_exit; smb2_set_related(&rqst[2]); rc = compound_send_recv(xid, ses, flags, 3, rqst, resp_buftype, rsp_iov); if (rc) goto iqinf_exit; if (qi.flags & PASSTHRU_FSCTL) { pqi = (struct smb_query_info __user *)arg; io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base; if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length) qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount); if (qi.input_buffer_length > 0 && le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length > rsp_iov[1].iov_len) { rc = -EFAULT; goto iqinf_exit; } if (copy_to_user(&pqi->input_buffer_length, &qi.input_buffer_length, sizeof(qi.input_buffer_length))) { rc = -EFAULT; goto iqinf_exit; } if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info), (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset), qi.input_buffer_length)) { rc = -EFAULT; goto iqinf_exit; } } else { pqi = (struct smb_query_info __user *)arg; qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base; if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length) qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength); if (copy_to_user(&pqi->input_buffer_length, &qi.input_buffer_length, sizeof(qi.input_buffer_length))) { rc = -EFAULT; goto iqinf_exit; } if (copy_to_user(pqi + 1, qi_rsp->Buffer, qi.input_buffer_length)) { rc = -EFAULT; goto iqinf_exit; } } iqinf_exit: kfree(buffer); SMB2_open_free(&rqst[0]); if (qi.flags & PASSTHRU_FSCTL) SMB2_ioctl_free(&rqst[1]); else SMB2_query_info_free(&rqst[1]); SMB2_close_free(&rqst[2]); free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); return rc; } static ssize_t smb2_copychunk_range(const unsigned int xid, struct cifsFileInfo *srcfile, struct cifsFileInfo *trgtfile, u64 src_off, u64 len, u64 dest_off) { int rc; unsigned int ret_data_len; struct copychunk_ioctl *pcchunk; struct copychunk_ioctl_rsp *retbuf = NULL; struct cifs_tcon *tcon; int chunks_copied = 0; bool chunk_sizes_updated = false; ssize_t bytes_written, total_bytes_written = 0; pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL); if (pcchunk == NULL) return -ENOMEM; cifs_dbg(FYI, "%s: about to call request res key\n", __func__); /* Request a key from the server to identify the source of the copy */ rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink), srcfile->fid.persistent_fid, srcfile->fid.volatile_fid, pcchunk); /* Note: request_res_key sets res_key null only if rc !=0 */ if (rc) goto cchunk_out; /* For now array only one chunk long, will make more flexible later */ pcchunk->ChunkCount = cpu_to_le32(1); pcchunk->Reserved = 0; pcchunk->Reserved2 = 0; tcon = tlink_tcon(trgtfile->tlink); while (len > 0) { pcchunk->SourceOffset = cpu_to_le64(src_off); pcchunk->TargetOffset = cpu_to_le64(dest_off); pcchunk->Length = cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk)); /* Request server copy to target from src identified by key */ rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid, trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE, true /* is_fsctl */, (char *)pcchunk, sizeof(struct copychunk_ioctl), CIFSMaxBufSize, (char **)&retbuf, &ret_data_len); if (rc == 0) { if (ret_data_len != sizeof(struct copychunk_ioctl_rsp)) { cifs_dbg(VFS, "invalid cchunk response size\n"); rc = -EIO; goto cchunk_out; } if (retbuf->TotalBytesWritten == 0) { cifs_dbg(FYI, "no bytes copied\n"); rc = -EIO; goto cchunk_out; } /* * Check if server claimed to write more than we asked */ if (le32_to_cpu(retbuf->TotalBytesWritten) > le32_to_cpu(pcchunk->Length)) { cifs_dbg(VFS, "invalid copy chunk response\n"); rc = -EIO; goto cchunk_out; } if (le32_to_cpu(retbuf->ChunksWritten) != 1) { cifs_dbg(VFS, "invalid num chunks written\n"); rc = -EIO; goto cchunk_out; } chunks_copied++; bytes_written = le32_to_cpu(retbuf->TotalBytesWritten); src_off += bytes_written; dest_off += bytes_written; len -= bytes_written; total_bytes_written += bytes_written; cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n", le32_to_cpu(retbuf->ChunksWritten), le32_to_cpu(retbuf->ChunkBytesWritten), bytes_written); } else if (rc == -EINVAL) { if (ret_data_len != sizeof(struct copychunk_ioctl_rsp)) goto cchunk_out; cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n", le32_to_cpu(retbuf->ChunksWritten), le32_to_cpu(retbuf->ChunkBytesWritten), le32_to_cpu(retbuf->TotalBytesWritten)); /* * Check if this is the first request using these sizes, * (ie check if copy succeed once with original sizes * and check if the server gave us different sizes after * we already updated max sizes on previous request). * if not then why is the server returning an error now */ if ((chunks_copied != 0) || chunk_sizes_updated) goto cchunk_out; /* Check that server is not asking us to grow size */ if (le32_to_cpu(retbuf->ChunkBytesWritten) < tcon->max_bytes_chunk) tcon->max_bytes_chunk = le32_to_cpu(retbuf->ChunkBytesWritten); else goto cchunk_out; /* server gave us bogus size */ /* No need to change MaxChunks since already set to 1 */ chunk_sizes_updated = true; } else goto cchunk_out; } cchunk_out: kfree(pcchunk); kfree(retbuf); if (rc) return rc; else return total_bytes_written; } static int smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *fid) { return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid); } static unsigned int smb2_read_data_offset(char *buf) { struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf; return rsp->DataOffset; } static unsigned int smb2_read_data_length(char *buf, bool in_remaining) { struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf; if (in_remaining) return le32_to_cpu(rsp->DataRemaining); return le32_to_cpu(rsp->DataLength); } static int smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid, struct cifs_io_parms *parms, unsigned int *bytes_read, char **buf, int *buf_type) { parms->persistent_fid = pfid->persistent_fid; parms->volatile_fid = pfid->volatile_fid; return SMB2_read(xid, parms, bytes_read, buf, buf_type); } static int smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid, struct cifs_io_parms *parms, unsigned int *written, struct kvec *iov, unsigned long nr_segs) { parms->persistent_fid = pfid->persistent_fid; parms->volatile_fid = pfid->volatile_fid; return SMB2_write(xid, parms, written, iov, nr_segs); } /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */ static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon, struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse) { struct cifsInodeInfo *cifsi; int rc; cifsi = CIFS_I(inode); /* if file already sparse don't bother setting sparse again */ if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse) return true; /* already sparse */ if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse) return true; /* already not sparse */ /* * Can't check for sparse support on share the usual way via the * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share * since Samba server doesn't set the flag on the share, yet * supports the set sparse FSCTL and returns sparse correctly * in the file attributes. If we fail setting sparse though we * mark that server does not support sparse files for this share * to avoid repeatedly sending the unsupported fsctl to server * if the file is repeatedly extended. */ if (tcon->broken_sparse_sup) return false; rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, cfile->fid.volatile_fid, FSCTL_SET_SPARSE, true /* is_fctl */, &setsparse, 1, CIFSMaxBufSize, NULL, NULL); if (rc) { tcon->broken_sparse_sup = true; cifs_dbg(FYI, "set sparse rc = %d\n", rc); return false; } if (setsparse) cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE; else cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE); return true; } static int smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon, struct cifsFileInfo *cfile, __u64 size, bool set_alloc) { __le64 eof = cpu_to_le64(size); struct inode *inode; /* * If extending file more than one page make sparse. Many Linux fs * make files sparse by default when extending via ftruncate */ inode = d_inode(cfile->dentry); if (!set_alloc && (size > inode->i_size + 8192)) { __u8 set_sparse = 1; /* whether set sparse succeeds or not, extend the file */ smb2_set_sparse(xid, tcon, cfile, inode, set_sparse); } return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, cfile->fid.volatile_fid, cfile->pid, &eof); } static int smb2_duplicate_extents(const unsigned int xid, struct cifsFileInfo *srcfile, struct cifsFileInfo *trgtfile, u64 src_off, u64 len, u64 dest_off) { int rc; unsigned int ret_data_len; struct duplicate_extents_to_file dup_ext_buf; struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink); /* server fileays advertise duplicate extent support with this flag */ if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) & FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0) return -EOPNOTSUPP; dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid; dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid; dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off); dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off); dup_ext_buf.ByteCount = cpu_to_le64(len); cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n", src_off, dest_off, len); rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false); if (rc) goto duplicate_extents_out; rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid, trgtfile->fid.volatile_fid, FSCTL_DUPLICATE_EXTENTS_TO_FILE, true /* is_fsctl */, (char *)&dup_ext_buf, sizeof(struct duplicate_extents_to_file), CIFSMaxBufSize, NULL, &ret_data_len); if (ret_data_len > 0) cifs_dbg(FYI, "Non-zero response length in duplicate extents\n"); duplicate_extents_out: return rc; } static int smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon, struct cifsFileInfo *cfile) { return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid, cfile->fid.volatile_fid); } static int smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon, struct cifsFileInfo *cfile) { struct fsctl_set_integrity_information_req integr_info; unsigned int ret_data_len; integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED); integr_info.Flags = 0; integr_info.Reserved = 0; return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, cfile->fid.volatile_fid, FSCTL_SET_INTEGRITY_INFORMATION, true /* is_fsctl */, (char *)&integr_info, sizeof(struct fsctl_set_integrity_information_req), CIFSMaxBufSize, NULL, &ret_data_len); } /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */ #define GMT_TOKEN_SIZE 50 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */ /* * Input buffer contains (empty) struct smb_snapshot array with size filled in * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2 */ static int smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon, struct cifsFileInfo *cfile, void __user *ioc_buf) { char *retbuf = NULL; unsigned int ret_data_len = 0; int rc; u32 max_response_size; struct smb_snapshot_array snapshot_in; /* * On the first query to enumerate the list of snapshots available * for this volume the buffer begins with 0 (number of snapshots * which can be returned is zero since at that point we do not know * how big the buffer needs to be). On the second query, * it (ret_data_len) is set to number of snapshots so we can * know to set the maximum response size larger (see below). */ if (get_user(ret_data_len, (unsigned int __user *)ioc_buf)) return -EFAULT; /* * Note that for snapshot queries that servers like Azure expect that * the first query be minimal size (and just used to get the number/size * of previous versions) so response size must be specified as EXACTLY * sizeof(struct snapshot_array) which is 16 when rounded up to multiple * of eight bytes. */ if (ret_data_len == 0) max_response_size = MIN_SNAPSHOT_ARRAY_SIZE; else max_response_size = CIFSMaxBufSize; rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, cfile->fid.volatile_fid, FSCTL_SRV_ENUMERATE_SNAPSHOTS, true /* is_fsctl */, NULL, 0 /* no input data */, max_response_size, (char **)&retbuf, &ret_data_len); cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n", rc, ret_data_len); if (rc) return rc; if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) { /* Fixup buffer */ if (copy_from_user(&snapshot_in, ioc_buf, sizeof(struct smb_snapshot_array))) { rc = -EFAULT; kfree(retbuf); return rc; } /* * Check for min size, ie not large enough to fit even one GMT * token (snapshot). On the first ioctl some users may pass in * smaller size (or zero) to simply get the size of the array * so the user space caller can allocate sufficient memory * and retry the ioctl again with larger array size sufficient * to hold all of the snapshot GMT tokens on the second try. */ if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE) ret_data_len = sizeof(struct smb_snapshot_array); /* * We return struct SRV_SNAPSHOT_ARRAY, followed by * the snapshot array (of 50 byte GMT tokens) each * representing an available previous version of the data */ if (ret_data_len > (snapshot_in.snapshot_array_size + sizeof(struct smb_snapshot_array))) ret_data_len = snapshot_in.snapshot_array_size + sizeof(struct smb_snapshot_array); if (copy_to_user(ioc_buf, retbuf, ret_data_len)) rc = -EFAULT; } kfree(retbuf); return rc; } static int smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon, const char *path, struct cifs_sb_info *cifs_sb, struct cifs_fid *fid, __u16 search_flags, struct cifs_search_info *srch_inf) { __le16 *utf16_path; int rc; __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; struct cifs_open_parms oparms; utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); if (!utf16_path) return -ENOMEM; oparms.tcon = tcon; oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA; oparms.disposition = FILE_OPEN; if (backup_cred(cifs_sb)) oparms.create_options = CREATE_OPEN_BACKUP_INTENT; else oparms.create_options = 0; oparms.fid = fid; oparms.reconnect = false; rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL); kfree(utf16_path); if (rc) { cifs_dbg(FYI, "open dir failed rc=%d\n", rc); return rc; } srch_inf->entries_in_buffer = 0; srch_inf->index_of_last_entry = 2; rc = SMB2_query_directory(xid, tcon, fid->persistent_fid, fid->volatile_fid, 0, srch_inf); if (rc) { cifs_dbg(FYI, "query directory failed rc=%d\n", rc); SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); } return rc; } static int smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *fid, __u16 search_flags, struct cifs_search_info *srch_inf) { return SMB2_query_directory(xid, tcon, fid->persistent_fid, fid->volatile_fid, 0, srch_inf); } static int smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *fid) { return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); } /* * If we negotiate SMB2 protocol and get STATUS_PENDING - update * the number of credits and return true. Otherwise - return false. */ static bool smb2_is_status_pending(char *buf, struct TCP_Server_Info *server) { struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf; if (shdr->Status != STATUS_PENDING) return false; if (shdr->CreditRequest) { spin_lock(&server->req_lock); server->credits += le16_to_cpu(shdr->CreditRequest); spin_unlock(&server->req_lock); wake_up(&server->request_q); } return true; } static bool smb2_is_session_expired(char *buf) { struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf; if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED && shdr->Status != STATUS_USER_SESSION_DELETED) return false; trace_smb3_ses_expired(shdr->TreeId, shdr->SessionId, le16_to_cpu(shdr->Command), le64_to_cpu(shdr->MessageId)); cifs_dbg(FYI, "Session expired or deleted\n"); return true; } static int smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid, struct cifsInodeInfo *cinode) { if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING) return SMB2_lease_break(0, tcon, cinode->lease_key, smb2_get_lease_state(cinode)); return SMB2_oplock_break(0, tcon, fid->persistent_fid, fid->volatile_fid, CIFS_CACHE_READ(cinode) ? 1 : 0); } void smb2_set_related(struct smb_rqst *rqst) { struct smb2_sync_hdr *shdr; shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base); if (shdr == NULL) { cifs_dbg(FYI, "shdr NULL in smb2_set_related\n"); return; } shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS; } char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0}; void smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst) { struct smb2_sync_hdr *shdr; struct cifs_ses *ses = tcon->ses; struct TCP_Server_Info *server = ses->server; unsigned long len = smb_rqst_len(server, rqst); int i, num_padding; shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base); if (shdr == NULL) { cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n"); return; } /* SMB headers in a compound are 8 byte aligned. */ /* No padding needed */ if (!(len & 7)) goto finished; num_padding = 8 - (len & 7); if (!smb3_encryption_required(tcon)) { /* * If we do not have encryption then we can just add an extra * iov for the padding. */ rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding; rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding; rqst->rq_nvec++; len += num_padding; } else { /* * We can not add a small padding iov for the encryption case * because the encryption framework can not handle the padding * iovs. * We have to flatten this into a single buffer and add * the padding to it. */ for (i = 1; i < rqst->rq_nvec; i++) { memcpy(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len, rqst->rq_iov[i].iov_base, rqst->rq_iov[i].iov_len); rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len; } memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len, 0, num_padding); rqst->rq_iov[0].iov_len += num_padding; len += num_padding; rqst->rq_nvec = 1; } finished: shdr->NextCommand = cpu_to_le32(len); } /* * Passes the query info response back to the caller on success. * Caller need to free this with free_rsp_buf(). */ int smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon, __le16 *utf16_path, u32 desired_access, u32 class, u32 type, u32 output_len, struct kvec *rsp, int *buftype, struct cifs_sb_info *cifs_sb) { struct cifs_ses *ses = tcon->ses; int flags = 0; struct smb_rqst rqst[3]; int resp_buftype[3]; struct kvec rsp_iov[3]; struct kvec open_iov[SMB2_CREATE_IOV_SIZE]; struct kvec qi_iov[1]; struct kvec close_iov[1]; u8 oplock = SMB2_OPLOCK_LEVEL_NONE; struct cifs_open_parms oparms; struct cifs_fid fid; int rc; if (smb3_encryption_required(tcon)) flags |= CIFS_TRANSFORM_REQ; memset(rqst, 0, sizeof(rqst)); resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; memset(rsp_iov, 0, sizeof(rsp_iov)); memset(&open_iov, 0, sizeof(open_iov)); rqst[0].rq_iov = open_iov; rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; oparms.tcon = tcon; oparms.desired_access = desired_access; oparms.disposition = FILE_OPEN; if (cifs_sb && backup_cred(cifs_sb)) oparms.create_options = CREATE_OPEN_BACKUP_INTENT; else oparms.create_options = 0; oparms.fid = &fid; oparms.reconnect = false; rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path); if (rc) goto qic_exit; smb2_set_next_command(tcon, &rqst[0]); memset(&qi_iov, 0, sizeof(qi_iov)); rqst[1].rq_iov = qi_iov; rqst[1].rq_nvec = 1; rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID, COMPOUND_FID, class, type, 0, output_len, 0, NULL); if (rc) goto qic_exit; smb2_set_next_command(tcon, &rqst[1]); smb2_set_related(&rqst[1]); memset(&close_iov, 0, sizeof(close_iov)); rqst[2].rq_iov = close_iov; rqst[2].rq_nvec = 1; rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID); if (rc) goto qic_exit; smb2_set_related(&rqst[2]); rc = compound_send_recv(xid, ses, flags, 3, rqst, resp_buftype, rsp_iov); if (rc) { free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); goto qic_exit; } *rsp = rsp_iov[1]; *buftype = resp_buftype[1]; qic_exit: SMB2_open_free(&rqst[0]); SMB2_query_info_free(&rqst[1]); SMB2_close_free(&rqst[2]); free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); return rc; } static int smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon, struct kstatfs *buf) { struct smb2_query_info_rsp *rsp; struct smb2_fs_full_size_info *info = NULL; __le16 utf16_path = 0; /* Null - open root of share */ struct kvec rsp_iov = {NULL, 0}; int buftype = CIFS_NO_BUFFER; int rc; rc = smb2_query_info_compound(xid, tcon, &utf16_path, FILE_READ_ATTRIBUTES, FS_FULL_SIZE_INFORMATION, SMB2_O_INFO_FILESYSTEM, sizeof(struct smb2_fs_full_size_info), &rsp_iov, &buftype, NULL); if (rc) goto qfs_exit; rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; buf->f_type = SMB2_MAGIC_NUMBER; 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, buf); qfs_exit: free_rsp_buf(buftype, rsp_iov.iov_base); return rc; } static int smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon, struct kstatfs *buf) { int rc; __le16 srch_path = 0; /* Null - open root of share */ u8 oplock = SMB2_OPLOCK_LEVEL_NONE; struct cifs_open_parms oparms; struct cifs_fid fid; if (!tcon->posix_extensions) return smb2_queryfs(xid, tcon, buf); oparms.tcon = tcon; oparms.desired_access = FILE_READ_ATTRIBUTES; oparms.disposition = FILE_OPEN; oparms.create_options = 0; oparms.fid = &fid; oparms.reconnect = false; rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL); if (rc) return rc; rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid, fid.volatile_fid, buf); buf->f_type = SMB2_MAGIC_NUMBER; SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); return rc; } static bool smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2) { return ob1->fid.persistent_fid == ob2->fid.persistent_fid && ob1->fid.volatile_fid == ob2->fid.volatile_fid; } static int smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset, __u64 length, __u32 type, int lock, int unlock, bool wait) { if (unlock && !lock) type = SMB2_LOCKFLAG_UNLOCK; return SMB2_lock(xid, tlink_tcon(cfile->tlink), cfile->fid.persistent_fid, cfile->fid.volatile_fid, current->tgid, length, offset, type, wait); } static void smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid) { memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE); } static void smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid) { memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE); } static void smb2_new_lease_key(struct cifs_fid *fid) { generate_random_uuid(fid->lease_key); } static int smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses, const char *search_name, struct dfs_info3_param **target_nodes, unsigned int *num_of_nodes, const struct nls_table *nls_codepage, int remap) { int rc; __le16 *utf16_path = NULL; int utf16_path_len = 0; struct cifs_tcon *tcon; struct fsctl_get_dfs_referral_req *dfs_req = NULL; struct get_dfs_referral_rsp *dfs_rsp = NULL; u32 dfs_req_size = 0, dfs_rsp_size = 0; cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name); /* * Try to use the IPC tcon, otherwise just use any */ tcon = ses->tcon_ipc; if (tcon == NULL) { spin_lock(&cifs_tcp_ses_lock); tcon = list_first_entry_or_null(&ses->tcon_list, struct cifs_tcon, tcon_list); if (tcon) tcon->tc_count++; spin_unlock(&cifs_tcp_ses_lock); } if (tcon == NULL) { cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n", ses); rc = -ENOTCONN; goto out; } utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX, &utf16_path_len, nls_codepage, remap); if (!utf16_path) { rc = -ENOMEM; goto out; } dfs_req_size = sizeof(*dfs_req) + utf16_path_len; dfs_req = kzalloc(dfs_req_size, GFP_KERNEL); if (!dfs_req) { rc = -ENOMEM; goto out; } /* Highest DFS referral version understood */ dfs_req->MaxReferralLevel = DFS_VERSION; /* Path to resolve in an UTF-16 null-terminated string */ memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len); do { rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID, FSCTL_DFS_GET_REFERRALS, true /* is_fsctl */, (char *)dfs_req, dfs_req_size, CIFSMaxBufSize, (char **)&dfs_rsp, &dfs_rsp_size); } while (rc == -EAGAIN); if (rc) { if ((rc != -ENOENT) && (rc != -EOPNOTSUPP)) cifs_dbg(VFS, "ioctl error in %s rc=%d\n", __func__, rc); goto out; } rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size, num_of_nodes, target_nodes, nls_codepage, remap, search_name, true /* is_unicode */); if (rc) { cifs_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc); goto out; } out: if (tcon && !tcon->ipc) { /* ipc tcons are not refcounted */ spin_lock(&cifs_tcp_ses_lock); tcon->tc_count--; spin_unlock(&cifs_tcp_ses_lock); } kfree(utf16_path); kfree(dfs_req); kfree(dfs_rsp); return rc; } static int parse_reparse_posix(struct reparse_posix_data *symlink_buf, u32 plen, char **target_path, struct cifs_sb_info *cifs_sb) { unsigned int len; /* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */ len = le16_to_cpu(symlink_buf->ReparseDataLength); if (le64_to_cpu(symlink_buf->InodeType) != NFS_SPECFILE_LNK) { cifs_dbg(VFS, "%lld not a supported symlink type\n", le64_to_cpu(symlink_buf->InodeType)); return -EOPNOTSUPP; } *target_path = cifs_strndup_from_utf16( symlink_buf->PathBuffer, len, true, cifs_sb->local_nls); if (!(*target_path)) return -ENOMEM; convert_delimiter(*target_path, '/'); cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path); return 0; } static int parse_reparse_symlink(struct reparse_symlink_data_buffer *symlink_buf, u32 plen, char **target_path, struct cifs_sb_info *cifs_sb) { unsigned int sub_len; unsigned int sub_offset; /* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */ sub_offset = le16_to_cpu(symlink_buf->SubstituteNameOffset); sub_len = le16_to_cpu(symlink_buf->SubstituteNameLength); if (sub_offset + 20 > plen || sub_offset + sub_len + 20 > plen) { cifs_dbg(VFS, "srv returned malformed symlink buffer\n"); return -EIO; } *target_path = cifs_strndup_from_utf16( symlink_buf->PathBuffer + sub_offset, sub_len, true, cifs_sb->local_nls); if (!(*target_path)) return -ENOMEM; convert_delimiter(*target_path, '/'); cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path); return 0; } static int parse_reparse_point(struct reparse_data_buffer *buf, u32 plen, char **target_path, struct cifs_sb_info *cifs_sb) { if (plen < sizeof(struct reparse_data_buffer)) { cifs_dbg(VFS, "reparse buffer is too small. Must be " "at least 8 bytes but was %d\n", plen); return -EIO; } if (plen < le16_to_cpu(buf->ReparseDataLength) + sizeof(struct reparse_data_buffer)) { cifs_dbg(VFS, "srv returned invalid reparse buf " "length: %d\n", plen); return -EIO; } /* See MS-FSCC 2.1.2 */ switch (le32_to_cpu(buf->ReparseTag)) { case IO_REPARSE_TAG_NFS: return parse_reparse_posix( (struct reparse_posix_data *)buf, plen, target_path, cifs_sb); case IO_REPARSE_TAG_SYMLINK: return parse_reparse_symlink( (struct reparse_symlink_data_buffer *)buf, plen, target_path, cifs_sb); default: cifs_dbg(VFS, "srv returned unknown symlink buffer " "tag:0x%08x\n", le32_to_cpu(buf->ReparseTag)); return -EOPNOTSUPP; } } #define SMB2_SYMLINK_STRUCT_SIZE \ (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp)) static int smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon, struct cifs_sb_info *cifs_sb, const char *full_path, char **target_path, bool is_reparse_point) { int rc; __le16 *utf16_path = NULL; __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; struct cifs_open_parms oparms; struct cifs_fid fid; struct kvec err_iov = {NULL, 0}; struct smb2_err_rsp *err_buf = NULL; struct smb2_symlink_err_rsp *symlink; unsigned int sub_len; unsigned int sub_offset; unsigned int print_len; unsigned int print_offset; int flags = 0; struct smb_rqst rqst[3]; int resp_buftype[3]; struct kvec rsp_iov[3]; struct kvec open_iov[SMB2_CREATE_IOV_SIZE]; struct kvec io_iov[SMB2_IOCTL_IOV_SIZE]; struct kvec close_iov[1]; struct smb2_create_rsp *create_rsp; struct smb2_ioctl_rsp *ioctl_rsp; struct reparse_data_buffer *reparse_buf; u32 plen; cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path); *target_path = NULL; if (smb3_encryption_required(tcon)) flags |= CIFS_TRANSFORM_REQ; memset(rqst, 0, sizeof(rqst)); resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; memset(rsp_iov, 0, sizeof(rsp_iov)); utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb); if (!utf16_path) return -ENOMEM; /* Open */ memset(&open_iov, 0, sizeof(open_iov)); rqst[0].rq_iov = open_iov; rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; memset(&oparms, 0, sizeof(oparms)); oparms.tcon = tcon; oparms.desired_access = FILE_READ_ATTRIBUTES; oparms.disposition = FILE_OPEN; if (backup_cred(cifs_sb)) oparms.create_options = CREATE_OPEN_BACKUP_INTENT; else oparms.create_options = 0; if (is_reparse_point) oparms.create_options = OPEN_REPARSE_POINT; oparms.fid = &fid; oparms.reconnect = false; rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path); if (rc) goto querty_exit; smb2_set_next_command(tcon, &rqst[0]); /* IOCTL */ memset(&io_iov, 0, sizeof(io_iov)); rqst[1].rq_iov = io_iov; rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE; rc = SMB2_ioctl_init(tcon, &rqst[1], fid.persistent_fid, fid.volatile_fid, FSCTL_GET_REPARSE_POINT, true /* is_fctl */, NULL, 0, CIFSMaxBufSize); if (rc) goto querty_exit; smb2_set_next_command(tcon, &rqst[1]); smb2_set_related(&rqst[1]); /* Close */ memset(&close_iov, 0, sizeof(close_iov)); rqst[2].rq_iov = close_iov; rqst[2].rq_nvec = 1; rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID); if (rc) goto querty_exit; smb2_set_related(&rqst[2]); rc = compound_send_recv(xid, tcon->ses, flags, 3, rqst, resp_buftype, rsp_iov); create_rsp = rsp_iov[0].iov_base; if (create_rsp && create_rsp->sync_hdr.Status) err_iov = rsp_iov[0]; ioctl_rsp = rsp_iov[1].iov_base; /* * Open was successful and we got an ioctl response. */ if ((rc == 0) && (is_reparse_point)) { /* See MS-FSCC 2.3.23 */ reparse_buf = (struct reparse_data_buffer *) ((char *)ioctl_rsp + le32_to_cpu(ioctl_rsp->OutputOffset)); plen = le32_to_cpu(ioctl_rsp->OutputCount); if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) > rsp_iov[1].iov_len) { cifs_dbg(VFS, "srv returned invalid ioctl len: %d\n", plen); rc = -EIO; goto querty_exit; } rc = parse_reparse_point(reparse_buf, plen, target_path, cifs_sb); goto querty_exit; } if (!rc || !err_iov.iov_base) { rc = -ENOENT; goto querty_exit; } err_buf = err_iov.iov_base; if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) || err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE) { rc = -EINVAL; goto querty_exit; } symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData; if (le32_to_cpu(symlink->SymLinkErrorTag) != SYMLINK_ERROR_TAG || le32_to_cpu(symlink->ReparseTag) != IO_REPARSE_TAG_SYMLINK) { rc = -EINVAL; goto querty_exit; } /* open must fail on symlink - reset rc */ rc = 0; sub_len = le16_to_cpu(symlink->SubstituteNameLength); sub_offset = le16_to_cpu(symlink->SubstituteNameOffset); print_len = le16_to_cpu(symlink->PrintNameLength); print_offset = le16_to_cpu(symlink->PrintNameOffset); if (err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) { rc = -EINVAL; goto querty_exit; } if (err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) { rc = -EINVAL; goto querty_exit; } *target_path = cifs_strndup_from_utf16( (char *)symlink->PathBuffer + sub_offset, sub_len, true, cifs_sb->local_nls); if (!(*target_path)) { rc = -ENOMEM; goto querty_exit; } convert_delimiter(*target_path, '/'); cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path); querty_exit: cifs_dbg(FYI, "query symlink rc %d\n", rc); kfree(utf16_path); SMB2_open_free(&rqst[0]); SMB2_ioctl_free(&rqst[1]); SMB2_close_free(&rqst[2]); free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); return rc; } static struct cifs_ntsd * get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb, const struct cifs_fid *cifsfid, u32 *pacllen) { struct cifs_ntsd *pntsd = NULL; unsigned int xid; int rc = -EOPNOTSUPP; struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); if (IS_ERR(tlink)) return ERR_CAST(tlink); xid = get_xid(); cifs_dbg(FYI, "trying to get acl\n"); rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid, cifsfid->volatile_fid, (void **)&pntsd, pacllen); free_xid(xid); cifs_put_tlink(tlink); cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen); if (rc) return ERR_PTR(rc); return pntsd; } static struct cifs_ntsd * get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb, const char *path, u32 *pacllen) { struct cifs_ntsd *pntsd = NULL; u8 oplock = SMB2_OPLOCK_LEVEL_NONE; unsigned int xid; int rc; struct cifs_tcon *tcon; struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); struct cifs_fid fid; struct cifs_open_parms oparms; __le16 *utf16_path; cifs_dbg(FYI, "get smb3 acl for path %s\n", path); if (IS_ERR(tlink)) return ERR_CAST(tlink); tcon = tlink_tcon(tlink); xid = get_xid(); if (backup_cred(cifs_sb)) oparms.create_options = CREATE_OPEN_BACKUP_INTENT; else oparms.create_options = 0; utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); if (!utf16_path) { rc = -ENOMEM; free_xid(xid); return ERR_PTR(rc); } oparms.tcon = tcon; oparms.desired_access = READ_CONTROL; oparms.disposition = FILE_OPEN; oparms.fid = &fid; oparms.reconnect = false; rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL); kfree(utf16_path); if (!rc) { rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid, fid.volatile_fid, (void **)&pntsd, pacllen); SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); } cifs_put_tlink(tlink); free_xid(xid); cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen); if (rc) return ERR_PTR(rc); return pntsd; } static int set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen, struct inode *inode, const char *path, int aclflag) { u8 oplock = SMB2_OPLOCK_LEVEL_NONE; unsigned int xid; int rc, access_flags = 0; struct cifs_tcon *tcon; struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); struct cifs_fid fid; struct cifs_open_parms oparms; __le16 *utf16_path; cifs_dbg(FYI, "set smb3 acl for path %s\n", path); if (IS_ERR(tlink)) return PTR_ERR(tlink); tcon = tlink_tcon(tlink); xid = get_xid(); if (backup_cred(cifs_sb)) oparms.create_options = CREATE_OPEN_BACKUP_INTENT; else oparms.create_options = 0; if (aclflag == CIFS_ACL_OWNER || aclflag == CIFS_ACL_GROUP) access_flags = WRITE_OWNER; else access_flags = WRITE_DAC; utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); if (!utf16_path) { rc = -ENOMEM; free_xid(xid); return rc; } oparms.tcon = tcon; oparms.desired_access = access_flags; oparms.disposition = FILE_OPEN; oparms.path = path; oparms.fid = &fid; oparms.reconnect = false; rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL); kfree(utf16_path); if (!rc) { rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid, fid.volatile_fid, pnntsd, acllen, aclflag); SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); } cifs_put_tlink(tlink); free_xid(xid); return rc; } /* Retrieve an ACL from the server */ static struct cifs_ntsd * get_smb2_acl(struct cifs_sb_info *cifs_sb, struct inode *inode, const char *path, u32 *pacllen) { struct cifs_ntsd *pntsd = NULL; struct cifsFileInfo *open_file = NULL; if (inode) open_file = find_readable_file(CIFS_I(inode), true); if (!open_file) return get_smb2_acl_by_path(cifs_sb, path, pacllen); pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen); cifsFileInfo_put(open_file); return pntsd; } static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon, loff_t offset, loff_t len, bool keep_size) { struct cifs_ses *ses = tcon->ses; struct inode *inode; struct cifsInodeInfo *cifsi; struct cifsFileInfo *cfile = file->private_data; struct file_zero_data_information fsctl_buf; long rc; unsigned int xid; __le64 eof; xid = get_xid(); inode = d_inode(cfile->dentry); cifsi = CIFS_I(inode); trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid, ses->Suid, offset, len); /* if file not oplocked can't be sure whether asking to extend size */ if (!CIFS_CACHE_READ(cifsi)) if (keep_size == false) { rc = -EOPNOTSUPP; trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid, ses->Suid, offset, len, rc); free_xid(xid); return rc; } cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len); fsctl_buf.FileOffset = cpu_to_le64(offset); fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len); rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, true, (char *)&fsctl_buf, sizeof(struct file_zero_data_information), 0, NULL, NULL); if (rc) goto zero_range_exit; /* * do we also need to change the size of the file? */ if (keep_size == false && i_size_read(inode) < offset + len) { eof = cpu_to_le64(offset + len); rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, cfile->fid.volatile_fid, cfile->pid, &eof); } zero_range_exit: free_xid(xid); if (rc) trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid, ses->Suid, offset, len, rc); else trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid, ses->Suid, offset, len); return rc; } static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon, loff_t offset, loff_t len) { struct inode *inode; struct cifsInodeInfo *cifsi; struct cifsFileInfo *cfile = file->private_data; struct file_zero_data_information fsctl_buf; long rc; unsigned int xid; __u8 set_sparse = 1; xid = get_xid(); inode = d_inode(cfile->dentry); cifsi = CIFS_I(inode); /* Need to make file sparse, if not already, before freeing range. */ /* Consider adding equivalent for compressed since it could also work */ if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) { rc = -EOPNOTSUPP; free_xid(xid); return rc; } cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len); fsctl_buf.FileOffset = cpu_to_le64(offset); fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len); rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, true /* is_fctl */, (char *)&fsctl_buf, sizeof(struct file_zero_data_information), CIFSMaxBufSize, NULL, NULL); free_xid(xid); return rc; } static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon, loff_t off, loff_t len, bool keep_size) { struct inode *inode; struct cifsInodeInfo *cifsi; struct cifsFileInfo *cfile = file->private_data; long rc = -EOPNOTSUPP; unsigned int xid; __le64 eof; xid = get_xid(); inode = d_inode(cfile->dentry); cifsi = CIFS_I(inode); trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid, tcon->ses->Suid, off, len); /* if file not oplocked can't be sure whether asking to extend size */ if (!CIFS_CACHE_READ(cifsi)) if (keep_size == false) { trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid, tcon->ses->Suid, off, len, rc); free_xid(xid); return rc; } /* * Files are non-sparse by default so falloc may be a no-op * Must check if file sparse. If not sparse, and not extending * then no need to do anything since file already allocated */ if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) { if (keep_size == true) rc = 0; /* check if extending file */ else if (i_size_read(inode) >= off + len) /* not extending file and already not sparse */ rc = 0; /* BB: in future add else clause to extend file */ else rc = -EOPNOTSUPP; if (rc) trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid, tcon->ses->Suid, off, len, rc); else trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid, tcon->ses->Suid, off, len); free_xid(xid); return rc; } if ((keep_size == true) || (i_size_read(inode) >= off + len)) { /* * Check if falloc starts within first few pages of file * and ends within a few pages of the end of file to * ensure that most of file is being forced to be * fallocated now. If so then setting whole file sparse * ie potentially making a few extra pages at the beginning * or end of the file non-sparse via set_sparse is harmless. */ if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) { rc = -EOPNOTSUPP; trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid, tcon->ses->Suid, off, len, rc); free_xid(xid); return rc; } smb2_set_sparse(xid, tcon, cfile, inode, false); rc = 0; } else { smb2_set_sparse(xid, tcon, cfile, inode, false); rc = 0; if (i_size_read(inode) < off + len) { eof = cpu_to_le64(off + len); rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, cfile->fid.volatile_fid, cfile->pid, &eof); } } if (rc) trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid, tcon->ses->Suid, off, len, rc); else trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid, tcon->ses->Suid, off, len); free_xid(xid); return rc; } static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence) { struct cifsFileInfo *wrcfile, *cfile = file->private_data; struct cifsInodeInfo *cifsi; struct inode *inode; int rc = 0; struct file_allocated_range_buffer in_data, *out_data = NULL; u32 out_data_len; unsigned int xid; if (whence != SEEK_HOLE && whence != SEEK_DATA) return generic_file_llseek(file, offset, whence); inode = d_inode(cfile->dentry); cifsi = CIFS_I(inode); if (offset < 0 || offset >= i_size_read(inode)) return -ENXIO; xid = get_xid(); /* * We need to be sure that all dirty pages are written as they * might fill holes on the server. * Note that we also MUST flush any written pages since at least * some servers (Windows2016) will not reflect recent writes in * QUERY_ALLOCATED_RANGES until SMB2_flush is called. */ wrcfile = find_writable_file(cifsi, false); if (wrcfile) { filemap_write_and_wait(inode->i_mapping); smb2_flush_file(xid, tcon, &wrcfile->fid); cifsFileInfo_put(wrcfile); } if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) { if (whence == SEEK_HOLE) offset = i_size_read(inode); goto lseek_exit; } in_data.file_offset = cpu_to_le64(offset); in_data.length = cpu_to_le64(i_size_read(inode)); rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, cfile->fid.volatile_fid, FSCTL_QUERY_ALLOCATED_RANGES, true, (char *)&in_data, sizeof(in_data), sizeof(struct file_allocated_range_buffer), (char **)&out_data, &out_data_len); if (rc == -E2BIG) rc = 0; if (rc) goto lseek_exit; if (whence == SEEK_HOLE && out_data_len == 0) goto lseek_exit; if (whence == SEEK_DATA && out_data_len == 0) { rc = -ENXIO; goto lseek_exit; } if (out_data_len < sizeof(struct file_allocated_range_buffer)) { rc = -EINVAL; goto lseek_exit; } if (whence == SEEK_DATA) { offset = le64_to_cpu(out_data->file_offset); goto lseek_exit; } if (offset < le64_to_cpu(out_data->file_offset)) goto lseek_exit; offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length); lseek_exit: free_xid(xid); kfree(out_data); if (!rc) return vfs_setpos(file, offset, inode->i_sb->s_maxbytes); else return rc; } static int smb3_fiemap(struct cifs_tcon *tcon, struct cifsFileInfo *cfile, struct fiemap_extent_info *fei, u64 start, u64 len) { unsigned int xid; struct file_allocated_range_buffer in_data, *out_data; u32 out_data_len; int i, num, rc, flags, last_blob; u64 next; if (fiemap_check_flags(fei, FIEMAP_FLAG_SYNC)) return -EBADR; xid = get_xid(); again: in_data.file_offset = cpu_to_le64(start); in_data.length = cpu_to_le64(len); rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, cfile->fid.volatile_fid, FSCTL_QUERY_ALLOCATED_RANGES, true, (char *)&in_data, sizeof(in_data), 1024 * sizeof(struct file_allocated_range_buffer), (char **)&out_data, &out_data_len); if (rc == -E2BIG) { last_blob = 0; rc = 0; } else last_blob = 1; if (rc) goto out; if (out_data_len < sizeof(struct file_allocated_range_buffer)) { rc = -EINVAL; goto out; } if (out_data_len % sizeof(struct file_allocated_range_buffer)) { rc = -EINVAL; goto out; } num = out_data_len / sizeof(struct file_allocated_range_buffer); for (i = 0; i < num; i++) { flags = 0; if (i == num - 1 && last_blob) flags |= FIEMAP_EXTENT_LAST; rc = fiemap_fill_next_extent(fei, le64_to_cpu(out_data[i].file_offset), le64_to_cpu(out_data[i].file_offset), le64_to_cpu(out_data[i].length), flags); if (rc < 0) goto out; if (rc == 1) { rc = 0; goto out; } } if (!last_blob) { next = le64_to_cpu(out_data[num - 1].file_offset) + le64_to_cpu(out_data[num - 1].length); len = len - (next - start); start = next; goto again; } out: free_xid(xid); kfree(out_data); return rc; } static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode, loff_t off, loff_t len) { /* KEEP_SIZE already checked for by do_fallocate */ if (mode & FALLOC_FL_PUNCH_HOLE) return smb3_punch_hole(file, tcon, off, len); else if (mode & FALLOC_FL_ZERO_RANGE) { if (mode & FALLOC_FL_KEEP_SIZE) return smb3_zero_range(file, tcon, off, len, true); return smb3_zero_range(file, tcon, off, len, false); } else if (mode == FALLOC_FL_KEEP_SIZE) return smb3_simple_falloc(file, tcon, off, len, true); else if (mode == 0) return smb3_simple_falloc(file, tcon, off, len, false); return -EOPNOTSUPP; } static void smb2_downgrade_oplock(struct TCP_Server_Info *server, struct cifsInodeInfo *cinode, bool set_level2) { if (set_level2) server->ops->set_oplock_level(cinode, SMB2_OPLOCK_LEVEL_II, 0, NULL); else server->ops->set_oplock_level(cinode, 0, 0, NULL); } static void smb21_downgrade_oplock(struct TCP_Server_Info *server, struct cifsInodeInfo *cinode, bool set_level2) { server->ops->set_oplock_level(cinode, set_level2 ? SMB2_LEASE_READ_CACHING_HE : 0, 0, NULL); } static void smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, unsigned int epoch, bool *purge_cache) { oplock &= 0xFF; if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE) return; if (oplock == SMB2_OPLOCK_LEVEL_BATCH) { cinode->oplock = CIFS_CACHE_RHW_FLG; cifs_dbg(FYI, "Batch Oplock granted on inode %p\n", &cinode->vfs_inode); } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) { cinode->oplock = CIFS_CACHE_RW_FLG; cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n", &cinode->vfs_inode); } else if (oplock == SMB2_OPLOCK_LEVEL_II) { cinode->oplock = CIFS_CACHE_READ_FLG; cifs_dbg(FYI, "Level II Oplock granted on inode %p\n", &cinode->vfs_inode); } else cinode->oplock = 0; } static void smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, unsigned int epoch, bool *purge_cache) { char message[5] = {0}; unsigned int new_oplock = 0; oplock &= 0xFF; if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE) return; if (oplock & SMB2_LEASE_READ_CACHING_HE) { new_oplock |= CIFS_CACHE_READ_FLG; strcat(message, "R"); } if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) { new_oplock |= CIFS_CACHE_HANDLE_FLG; strcat(message, "H"); } if (oplock & SMB2_LEASE_WRITE_CACHING_HE) { new_oplock |= CIFS_CACHE_WRITE_FLG; strcat(message, "W"); } if (!new_oplock) strncpy(message, "None", sizeof(message)); cinode->oplock = new_oplock; cifs_dbg(FYI, "%s Lease granted on inode %p\n", message, &cinode->vfs_inode); } static void smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, unsigned int epoch, bool *purge_cache) { unsigned int old_oplock = cinode->oplock; smb21_set_oplock_level(cinode, oplock, epoch, purge_cache); if (purge_cache) { *purge_cache = false; if (old_oplock == CIFS_CACHE_READ_FLG) { if (cinode->oplock == CIFS_CACHE_READ_FLG && (epoch - cinode->epoch > 0)) *purge_cache = true; else if (cinode->oplock == CIFS_CACHE_RH_FLG && (epoch - cinode->epoch > 1)) *purge_cache = true; else if (cinode->oplock == CIFS_CACHE_RHW_FLG && (epoch - cinode->epoch > 1)) *purge_cache = true; else if (cinode->oplock == 0 && (epoch - cinode->epoch > 0)) *purge_cache = true; } else if (old_oplock == CIFS_CACHE_RH_FLG) { if (cinode->oplock == CIFS_CACHE_RH_FLG && (epoch - cinode->epoch > 0)) *purge_cache = true; else if (cinode->oplock == CIFS_CACHE_RHW_FLG && (epoch - cinode->epoch > 1)) *purge_cache = true; } cinode->epoch = epoch; } } static bool smb2_is_read_op(__u32 oplock) { return oplock == SMB2_OPLOCK_LEVEL_II; } static bool smb21_is_read_op(__u32 oplock) { return (oplock & SMB2_LEASE_READ_CACHING_HE) && !(oplock & SMB2_LEASE_WRITE_CACHING_HE); } static __le32 map_oplock_to_lease(u8 oplock) { if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING; else if (oplock == SMB2_OPLOCK_LEVEL_II) return SMB2_LEASE_READ_CACHING; else if (oplock == SMB2_OPLOCK_LEVEL_BATCH) return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING | SMB2_LEASE_WRITE_CACHING; return 0; } static char * smb2_create_lease_buf(u8 *lease_key, u8 oplock) { struct create_lease *buf; buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL); if (!buf) return NULL; memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE); buf->lcontext.LeaseState = map_oplock_to_lease(oplock); buf->ccontext.DataOffset = cpu_to_le16(offsetof (struct create_lease, lcontext)); buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context)); buf->ccontext.NameOffset = cpu_to_le16(offsetof (struct create_lease, Name)); buf->ccontext.NameLength = cpu_to_le16(4); /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */ buf->Name[0] = 'R'; buf->Name[1] = 'q'; buf->Name[2] = 'L'; buf->Name[3] = 's'; return (char *)buf; } static char * smb3_create_lease_buf(u8 *lease_key, u8 oplock) { struct create_lease_v2 *buf; buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL); if (!buf) return NULL; memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE); buf->lcontext.LeaseState = map_oplock_to_lease(oplock); buf->ccontext.DataOffset = cpu_to_le16(offsetof (struct create_lease_v2, lcontext)); buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2)); buf->ccontext.NameOffset = cpu_to_le16(offsetof (struct create_lease_v2, Name)); buf->ccontext.NameLength = cpu_to_le16(4); /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */ buf->Name[0] = 'R'; buf->Name[1] = 'q'; buf->Name[2] = 'L'; buf->Name[3] = 's'; return (char *)buf; } static __u8 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key) { struct create_lease *lc = (struct create_lease *)buf; *epoch = 0; /* not used */ if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS) return SMB2_OPLOCK_LEVEL_NOCHANGE; return le32_to_cpu(lc->lcontext.LeaseState); } static __u8 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key) { struct create_lease_v2 *lc = (struct create_lease_v2 *)buf; *epoch = le16_to_cpu(lc->lcontext.Epoch); if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS) return SMB2_OPLOCK_LEVEL_NOCHANGE; if (lease_key) memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE); return le32_to_cpu(lc->lcontext.LeaseState); } static unsigned int smb2_wp_retry_size(struct inode *inode) { return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize, SMB2_MAX_BUFFER_SIZE); } static bool smb2_dir_needs_close(struct cifsFileInfo *cfile) { return !cfile->invalidHandle; } static void fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len, struct smb_rqst *old_rq, __le16 cipher_type) { struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)old_rq->rq_iov[0].iov_base; memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr)); tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM; tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len); tr_hdr->Flags = cpu_to_le16(0x01); if (cipher_type == SMB2_ENCRYPTION_AES128_GCM) get_random_bytes(&tr_hdr->Nonce, SMB3_AES128GCM_NONCE); else get_random_bytes(&tr_hdr->Nonce, SMB3_AES128CCM_NONCE); memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8); } /* We can not use the normal sg_set_buf() as we will sometimes pass a * stack object as buf. */ static inline void smb2_sg_set_buf(struct scatterlist *sg, const void *buf, unsigned int buflen) { sg_set_page(sg, virt_to_page(buf), buflen, offset_in_page(buf)); } /* Assumes the first rqst has a transform header as the first iov. * I.e. * rqst[0].rq_iov[0] is transform header * rqst[0].rq_iov[1+] data to be encrypted/decrypted * rqst[1+].rq_iov[0+] data to be encrypted/decrypted */ static struct scatterlist * init_sg(int num_rqst, struct smb_rqst *rqst, u8 *sign) { unsigned int sg_len; struct scatterlist *sg; unsigned int i; unsigned int j; unsigned int idx = 0; int skip; sg_len = 1; for (i = 0; i < num_rqst; i++) sg_len += rqst[i].rq_nvec + rqst[i].rq_npages; sg = kmalloc_array(sg_len, sizeof(struct scatterlist), GFP_KERNEL); if (!sg) return NULL; sg_init_table(sg, sg_len); for (i = 0; i < num_rqst; i++) { for (j = 0; j < rqst[i].rq_nvec; j++) { /* * The first rqst has a transform header where the * first 20 bytes are not part of the encrypted blob */ skip = (i == 0) && (j == 0) ? 20 : 0; smb2_sg_set_buf(&sg[idx++], rqst[i].rq_iov[j].iov_base + skip, rqst[i].rq_iov[j].iov_len - skip); } for (j = 0; j < rqst[i].rq_npages; j++) { unsigned int len, offset; rqst_page_get_length(&rqst[i], j, &len, &offset); sg_set_page(&sg[idx++], rqst[i].rq_pages[j], len, offset); } } smb2_sg_set_buf(&sg[idx], sign, SMB2_SIGNATURE_SIZE); return sg; } static int smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key) { struct cifs_ses *ses; u8 *ses_enc_key; spin_lock(&cifs_tcp_ses_lock); list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { if (ses->Suid != ses_id) continue; ses_enc_key = enc ? ses->smb3encryptionkey : ses->smb3decryptionkey; memcpy(key, ses_enc_key, SMB3_SIGN_KEY_SIZE); spin_unlock(&cifs_tcp_ses_lock); return 0; } spin_unlock(&cifs_tcp_ses_lock); return 1; } /* * Encrypt or decrypt @rqst message. @rqst[0] has the following format: * iov[0] - transform header (associate data), * iov[1-N] - SMB2 header and pages - data to encrypt. * On success return encrypted data in iov[1-N] and pages, leave iov[0] * untouched. */ static int crypt_message(struct TCP_Server_Info *server, int num_rqst, struct smb_rqst *rqst, int enc) { struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base; unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20; int rc = 0; struct scatterlist *sg; u8 sign[SMB2_SIGNATURE_SIZE] = {}; u8 key[SMB3_SIGN_KEY_SIZE]; struct aead_request *req; char *iv; unsigned int iv_len; DECLARE_CRYPTO_WAIT(wait); struct crypto_aead *tfm; unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize); rc = smb2_get_enc_key(server, tr_hdr->SessionId, enc, key); if (rc) { cifs_dbg(VFS, "%s: Could not get %scryption key\n", __func__, enc ? "en" : "de"); return 0; } rc = smb3_crypto_aead_allocate(server); if (rc) { cifs_dbg(VFS, "%s: crypto alloc failed\n", __func__); return rc; } tfm = enc ? server->secmech.ccmaesencrypt : server->secmech.ccmaesdecrypt; rc = crypto_aead_setkey(tfm, key, SMB3_SIGN_KEY_SIZE); if (rc) { cifs_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc); return rc; } rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE); if (rc) { cifs_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc); return rc; } req = aead_request_alloc(tfm, GFP_KERNEL); if (!req) { cifs_dbg(VFS, "%s: Failed to alloc aead request\n", __func__); return -ENOMEM; } if (!enc) { memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE); crypt_len += SMB2_SIGNATURE_SIZE; } sg = init_sg(num_rqst, rqst, sign); if (!sg) { cifs_dbg(VFS, "%s: Failed to init sg\n", __func__); rc = -ENOMEM; goto free_req; } iv_len = crypto_aead_ivsize(tfm); iv = kzalloc(iv_len, GFP_KERNEL); if (!iv) { cifs_dbg(VFS, "%s: Failed to alloc iv\n", __func__); rc = -ENOMEM; goto free_sg; } if (server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES128GCM_NONCE); else { iv[0] = 3; memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES128CCM_NONCE); } aead_request_set_crypt(req, sg, sg, crypt_len, iv); aead_request_set_ad(req, assoc_data_len); aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG, crypto_req_done, &wait); rc = crypto_wait_req(enc ? crypto_aead_encrypt(req) : crypto_aead_decrypt(req), &wait); if (!rc && enc) memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE); kfree(iv); free_sg: kfree(sg); free_req: kfree(req); return rc; } void smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst) { int i, j; for (i = 0; i < num_rqst; i++) { if (rqst[i].rq_pages) { for (j = rqst[i].rq_npages - 1; j >= 0; j--) put_page(rqst[i].rq_pages[j]); kfree(rqst[i].rq_pages); } } } /* * This function will initialize new_rq and encrypt the content. * The first entry, new_rq[0], only contains a single iov which contains * a smb2_transform_hdr and is pre-allocated by the caller. * This function then populates new_rq[1+] with the content from olq_rq[0+]. * * The end result is an array of smb_rqst structures where the first structure * only contains a single iov for the transform header which we then can pass * to crypt_message(). * * new_rq[0].rq_iov[0] : smb2_transform_hdr pre-allocated by the caller * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests */ static int smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst, struct smb_rqst *new_rq, struct smb_rqst *old_rq) { struct page **pages; struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base; unsigned int npages; unsigned int orig_len = 0; int i, j; int rc = -ENOMEM; for (i = 1; i < num_rqst; i++) { npages = old_rq[i - 1].rq_npages; pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL); if (!pages) goto err_free; new_rq[i].rq_pages = pages; new_rq[i].rq_npages = npages; new_rq[i].rq_offset = old_rq[i - 1].rq_offset; new_rq[i].rq_pagesz = old_rq[i - 1].rq_pagesz; new_rq[i].rq_tailsz = old_rq[i - 1].rq_tailsz; new_rq[i].rq_iov = old_rq[i - 1].rq_iov; new_rq[i].rq_nvec = old_rq[i - 1].rq_nvec; orig_len += smb_rqst_len(server, &old_rq[i - 1]); for (j = 0; j < npages; j++) { pages[j] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM); if (!pages[j]) goto err_free; } /* copy pages form the old */ for (j = 0; j < npages; j++) { char *dst, *src; unsigned int offset, len; rqst_page_get_length(&new_rq[i], j, &len, &offset); dst = (char *) kmap(new_rq[i].rq_pages[j]) + offset; src = (char *) kmap(old_rq[i - 1].rq_pages[j]) + offset; memcpy(dst, src, len); kunmap(new_rq[i].rq_pages[j]); kunmap(old_rq[i - 1].rq_pages[j]); } } /* fill the 1st iov with a transform header */ fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type); rc = crypt_message(server, num_rqst, new_rq, 1); cifs_dbg(FYI, "Encrypt message returned %d\n", rc); if (rc) goto err_free; return rc; err_free: smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]); return rc; } static int smb3_is_transform_hdr(void *buf) { struct smb2_transform_hdr *trhdr = buf; return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM; } static int decrypt_raw_data(struct TCP_Server_Info *server, char *buf, unsigned int buf_data_size, struct page **pages, unsigned int npages, unsigned int page_data_size) { struct kvec iov[2]; struct smb_rqst rqst = {NULL}; int rc; iov[0].iov_base = buf; iov[0].iov_len = sizeof(struct smb2_transform_hdr); iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr); iov[1].iov_len = buf_data_size; rqst.rq_iov = iov; rqst.rq_nvec = 2; rqst.rq_pages = pages; rqst.rq_npages = npages; rqst.rq_pagesz = PAGE_SIZE; rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE; rc = crypt_message(server, 1, &rqst, 0); cifs_dbg(FYI, "Decrypt message returned %d\n", rc); if (rc) return rc; memmove(buf, iov[1].iov_base, buf_data_size); server->total_read = buf_data_size + page_data_size; return rc; } static int read_data_into_pages(struct TCP_Server_Info *server, struct page **pages, unsigned int npages, unsigned int len) { int i; int length; for (i = 0; i < npages; i++) { struct page *page = pages[i]; size_t n; n = len; if (len >= PAGE_SIZE) { /* enough data to fill the page */ n = PAGE_SIZE; len -= n; } else { zero_user(page, len, PAGE_SIZE - len); len = 0; } length = cifs_read_page_from_socket(server, page, 0, n); if (length < 0) return length; server->total_read += length; } return 0; } static int init_read_bvec(struct page **pages, unsigned int npages, unsigned int data_size, unsigned int cur_off, struct bio_vec **page_vec) { struct bio_vec *bvec; int i; bvec = kcalloc(npages, sizeof(struct bio_vec), GFP_KERNEL); if (!bvec) return -ENOMEM; for (i = 0; i < npages; i++) { bvec[i].bv_page = pages[i]; bvec[i].bv_offset = (i == 0) ? cur_off : 0; bvec[i].bv_len = min_t(unsigned int, PAGE_SIZE, data_size); data_size -= bvec[i].bv_len; } if (data_size != 0) { cifs_dbg(VFS, "%s: something went wrong\n", __func__); kfree(bvec); return -EIO; } *page_vec = bvec; return 0; } static int handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid, char *buf, unsigned int buf_len, struct page **pages, unsigned int npages, unsigned int page_data_size) { unsigned int data_offset; unsigned int data_len; unsigned int cur_off; unsigned int cur_page_idx; unsigned int pad_len; struct cifs_readdata *rdata = mid->callback_data; struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf; struct bio_vec *bvec = NULL; struct iov_iter iter; struct kvec iov; int length; bool use_rdma_mr = false; if (shdr->Command != SMB2_READ) { cifs_dbg(VFS, "only big read responses are supported\n"); return -ENOTSUPP; } if (server->ops->is_session_expired && server->ops->is_session_expired(buf)) { cifs_reconnect(server); wake_up(&server->response_q); return -1; } if (server->ops->is_status_pending && server->ops->is_status_pending(buf, server)) return -1; /* set up first two iov to get credits */ rdata->iov[0].iov_base = buf; rdata->iov[0].iov_len = 0; rdata->iov[1].iov_base = buf; rdata->iov[1].iov_len = min_t(unsigned int, buf_len, server->vals->read_rsp_size); cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n", rdata->iov[0].iov_base, rdata->iov[0].iov_len); cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n", rdata->iov[1].iov_base, rdata->iov[1].iov_len); rdata->result = server->ops->map_error(buf, true); if (rdata->result != 0) { cifs_dbg(FYI, "%s: server returned error %d\n", __func__, rdata->result); /* normal error on read response */ dequeue_mid(mid, false); return 0; } data_offset = server->ops->read_data_offset(buf); #ifdef CONFIG_CIFS_SMB_DIRECT use_rdma_mr = rdata->mr; #endif data_len = server->ops->read_data_length(buf, use_rdma_mr); if (data_offset < server->vals->read_rsp_size) { /* * win2k8 sometimes sends an offset of 0 when the read * is beyond the EOF. Treat it as if the data starts just after * the header. */ cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n", __func__, data_offset); data_offset = server->vals->read_rsp_size; } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) { /* data_offset is beyond the end of smallbuf */ cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n", __func__, data_offset); rdata->result = -EIO; dequeue_mid(mid, rdata->result); return 0; } pad_len = data_offset - server->vals->read_rsp_size; if (buf_len <= data_offset) { /* read response payload is in pages */ cur_page_idx = pad_len / PAGE_SIZE; cur_off = pad_len % PAGE_SIZE; if (cur_page_idx != 0) { /* data offset is beyond the 1st page of response */ cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n", __func__, data_offset); rdata->result = -EIO; dequeue_mid(mid, rdata->result); return 0; } if (data_len > page_data_size - pad_len) { /* data_len is corrupt -- discard frame */ rdata->result = -EIO; dequeue_mid(mid, rdata->result); return 0; } rdata->result = init_read_bvec(pages, npages, page_data_size, cur_off, &bvec); if (rdata->result != 0) { dequeue_mid(mid, rdata->result); return 0; } iov_iter_bvec(&iter, WRITE, bvec, npages, data_len); } else if (buf_len >= data_offset + data_len) { /* read response payload is in buf */ WARN_ONCE(npages > 0, "read data can be either in buf or in pages"); iov.iov_base = buf + data_offset; iov.iov_len = data_len; iov_iter_kvec(&iter, WRITE, &iov, 1, data_len); } else { /* read response payload cannot be in both buf and pages */ WARN_ONCE(1, "buf can not contain only a part of read data"); rdata->result = -EIO; dequeue_mid(mid, rdata->result); return 0; } length = rdata->copy_into_pages(server, rdata, &iter); kfree(bvec); if (length < 0) return length; dequeue_mid(mid, false); return length; } static int receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid) { char *buf = server->smallbuf; struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf; unsigned int npages; struct page **pages; unsigned int len; unsigned int buflen = server->pdu_size; int rc; int i = 0; len = min_t(unsigned int, buflen, server->vals->read_rsp_size + sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1; rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len); if (rc < 0) return rc; server->total_read += rc; len = le32_to_cpu(tr_hdr->OriginalMessageSize) - server->vals->read_rsp_size; npages = DIV_ROUND_UP(len, PAGE_SIZE); pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL); if (!pages) { rc = -ENOMEM; goto discard_data; } for (; i < npages; i++) { pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM); if (!pages[i]) { rc = -ENOMEM; goto discard_data; } } /* read read data into pages */ rc = read_data_into_pages(server, pages, npages, len); if (rc) goto free_pages; rc = cifs_discard_remaining_data(server); if (rc) goto free_pages; rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size, pages, npages, len); if (rc) goto free_pages; *mid = smb2_find_mid(server, buf); if (*mid == NULL) cifs_dbg(FYI, "mid not found\n"); else { cifs_dbg(FYI, "mid found\n"); (*mid)->decrypted = true; rc = handle_read_data(server, *mid, buf, server->vals->read_rsp_size, pages, npages, len); } free_pages: for (i = i - 1; i >= 0; i--) put_page(pages[i]); kfree(pages); return rc; discard_data: cifs_discard_remaining_data(server); goto free_pages; } static int receive_encrypted_standard(struct TCP_Server_Info *server, struct mid_q_entry **mids, char **bufs, int *num_mids) { int ret, length; char *buf = server->smallbuf; char *tmpbuf; struct smb2_sync_hdr *shdr; unsigned int pdu_length = server->pdu_size; unsigned int buf_size; struct mid_q_entry *mid_entry; int next_is_large; char *next_buffer = NULL; *num_mids = 0; /* switch to large buffer if too big for a small one */ if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) { server->large_buf = true; memcpy(server->bigbuf, buf, server->total_read); buf = server->bigbuf; } /* now read the rest */ length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, pdu_length - HEADER_SIZE(server) + 1); if (length < 0) return length; server->total_read += length; buf_size = pdu_length - sizeof(struct smb2_transform_hdr); length = decrypt_raw_data(server, buf, buf_size, NULL, 0, 0); if (length) return length; next_is_large = server->large_buf; one_more: shdr = (struct smb2_sync_hdr *)buf; if (shdr->NextCommand) { if (next_is_large) { tmpbuf = server->bigbuf; next_buffer = (char *)cifs_buf_get(); } else { tmpbuf = server->smallbuf; next_buffer = (char *)cifs_small_buf_get(); } memcpy(next_buffer, tmpbuf + le32_to_cpu(shdr->NextCommand), pdu_length - le32_to_cpu(shdr->NextCommand)); } mid_entry = smb2_find_mid(server, buf); if (mid_entry == NULL) cifs_dbg(FYI, "mid not found\n"); else { cifs_dbg(FYI, "mid found\n"); mid_entry->decrypted = true; mid_entry->resp_buf_size = server->pdu_size; } if (*num_mids >= MAX_COMPOUND) { cifs_dbg(VFS, "too many PDUs in compound\n"); return -1; } bufs[*num_mids] = buf; mids[(*num_mids)++] = mid_entry; if (mid_entry && mid_entry->handle) ret = mid_entry->handle(server, mid_entry); else ret = cifs_handle_standard(server, mid_entry); if (ret == 0 && shdr->NextCommand) { pdu_length -= le32_to_cpu(shdr->NextCommand); server->large_buf = next_is_large; if (next_is_large) server->bigbuf = next_buffer; else server->smallbuf = next_buffer; buf += le32_to_cpu(shdr->NextCommand); goto one_more; } return ret; } static int smb3_receive_transform(struct TCP_Server_Info *server, struct mid_q_entry **mids, char **bufs, int *num_mids) { char *buf = server->smallbuf; unsigned int pdu_length = server->pdu_size; struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf; unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize); if (pdu_length < sizeof(struct smb2_transform_hdr) + sizeof(struct smb2_sync_hdr)) { cifs_dbg(VFS, "Transform message is too small (%u)\n", pdu_length); cifs_reconnect(server); wake_up(&server->response_q); return -ECONNABORTED; } if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) { cifs_dbg(VFS, "Transform message is broken\n"); cifs_reconnect(server); wake_up(&server->response_q); return -ECONNABORTED; } /* TODO: add support for compounds containing READ. */ if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) { *num_mids = 1; return receive_encrypted_read(server, &mids[0]); } return receive_encrypted_standard(server, mids, bufs, num_mids); } int smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid) { char *buf = server->large_buf ? server->bigbuf : server->smallbuf; return handle_read_data(server, mid, buf, server->pdu_size, NULL, 0, 0); } static int smb2_next_header(char *buf) { struct smb2_sync_hdr *hdr = (struct smb2_sync_hdr *)buf; struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf; if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) return sizeof(struct smb2_transform_hdr) + le32_to_cpu(t_hdr->OriginalMessageSize); return le32_to_cpu(hdr->NextCommand); } static int smb2_make_node(unsigned int xid, struct inode *inode, struct dentry *dentry, struct cifs_tcon *tcon, char *full_path, umode_t mode, dev_t dev) { struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); int rc = -EPERM; int create_options = CREATE_NOT_DIR | CREATE_OPTION_SPECIAL; FILE_ALL_INFO *buf = NULL; struct cifs_io_parms io_parms; __u32 oplock = 0; struct cifs_fid fid; struct cifs_open_parms oparms; unsigned int bytes_written; struct win_dev *pdev; struct kvec iov[2]; /* * Check if mounted with mount parm 'sfu' mount parm. * SFU emulation should work with all servers, but only * supports block and char device (no socket & fifo), * and was used by default in earlier versions of Windows */ if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)) goto out; /* * TODO: Add ability to create instead via reparse point. Windows (e.g. * their current NFS server) uses this approach to expose special files * over SMB2/SMB3 and Samba will do this with SMB3.1.1 POSIX Extensions */ if (!S_ISCHR(mode) && !S_ISBLK(mode)) goto out; cifs_dbg(FYI, "sfu compat create special file\n"); buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); if (buf == NULL) { rc = -ENOMEM; goto out; } if (backup_cred(cifs_sb)) create_options |= CREATE_OPEN_BACKUP_INTENT; oparms.tcon = tcon; oparms.cifs_sb = cifs_sb; oparms.desired_access = GENERIC_WRITE; oparms.create_options = create_options; oparms.disposition = FILE_CREATE; oparms.path = full_path; oparms.fid = &fid; oparms.reconnect = false; if (tcon->ses->server->oplocks) oplock = REQ_OPLOCK; else oplock = 0; rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, buf); if (rc) goto out; /* * BB Do not bother to decode buf since no local inode yet to put * timestamps in, but we can reuse it safely. */ pdev = (struct win_dev *)buf; io_parms.pid = current->tgid; io_parms.tcon = tcon; io_parms.offset = 0; io_parms.length = sizeof(struct win_dev); iov[1].iov_base = buf; iov[1].iov_len = sizeof(struct win_dev); if (S_ISCHR(mode)) { memcpy(pdev->type, "IntxCHR", 8); pdev->major = cpu_to_le64(MAJOR(dev)); pdev->minor = cpu_to_le64(MINOR(dev)); rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms, &bytes_written, iov, 1); } else if (S_ISBLK(mode)) { memcpy(pdev->type, "IntxBLK", 8); pdev->major = cpu_to_le64(MAJOR(dev)); pdev->minor = cpu_to_le64(MINOR(dev)); rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms, &bytes_written, iov, 1); } tcon->ses->server->ops->close(xid, tcon, &fid); d_drop(dentry); /* FIXME: add code here to set EAs */ out: kfree(buf); return rc; } struct smb_version_operations smb20_operations = { .compare_fids = smb2_compare_fids, .setup_request = smb2_setup_request, .setup_async_request = smb2_setup_async_request, .check_receive = smb2_check_receive, .add_credits = smb2_add_credits, .set_credits = smb2_set_credits, .get_credits_field = smb2_get_credits_field, .get_credits = smb2_get_credits, .wait_mtu_credits = cifs_wait_mtu_credits, .get_next_mid = smb2_get_next_mid, .revert_current_mid = smb2_revert_current_mid, .read_data_offset = smb2_read_data_offset, .read_data_length = smb2_read_data_length, .map_error = map_smb2_to_linux_error, .find_mid = smb2_find_mid, .check_message = smb2_check_message, .dump_detail = smb2_dump_detail, .clear_stats = smb2_clear_stats, .print_stats = smb2_print_stats, .is_oplock_break = smb2_is_valid_oplock_break, .handle_cancelled_mid = smb2_handle_cancelled_mid, .downgrade_oplock = smb2_downgrade_oplock, .need_neg = smb2_need_neg, .negotiate = smb2_negotiate, .negotiate_wsize = smb2_negotiate_wsize, .negotiate_rsize = smb2_negotiate_rsize, .sess_setup = SMB2_sess_setup, .logoff = SMB2_logoff, .tree_connect = SMB2_tcon, .tree_disconnect = SMB2_tdis, .qfs_tcon = smb2_qfs_tcon, .is_path_accessible = smb2_is_path_accessible, .can_echo = smb2_can_echo, .echo = SMB2_echo, .query_path_info = smb2_query_path_info, .get_srv_inum = smb2_get_srv_inum, .query_file_info = smb2_query_file_info, .set_path_size = smb2_set_path_size, .set_file_size = smb2_set_file_size, .set_file_info = smb2_set_file_info, .set_compression = smb2_set_compression, .mkdir = smb2_mkdir, .mkdir_setinfo = smb2_mkdir_setinfo, .rmdir = smb2_rmdir, .unlink = smb2_unlink, .rename = smb2_rename_path, .create_hardlink = smb2_create_hardlink, .query_symlink = smb2_query_symlink, .query_mf_symlink = smb3_query_mf_symlink, .create_mf_symlink = smb3_create_mf_symlink, .open = smb2_open_file, .set_fid = smb2_set_fid, .close = smb2_close_file, .flush = smb2_flush_file, .async_readv = smb2_async_readv, .async_writev = smb2_async_writev, .sync_read = smb2_sync_read, .sync_write = smb2_sync_write, .query_dir_first = smb2_query_dir_first, .query_dir_next = smb2_query_dir_next, .close_dir = smb2_close_dir, .calc_smb_size = smb2_calc_size, .is_status_pending = smb2_is_status_pending, .is_session_expired = smb2_is_session_expired, .oplock_response = smb2_oplock_response, .queryfs = smb2_queryfs, .mand_lock = smb2_mand_lock, .mand_unlock_range = smb2_unlock_range, .push_mand_locks = smb2_push_mandatory_locks, .get_lease_key = smb2_get_lease_key, .set_lease_key = smb2_set_lease_key, .new_lease_key = smb2_new_lease_key, .calc_signature = smb2_calc_signature, .is_read_op = smb2_is_read_op, .set_oplock_level = smb2_set_oplock_level, .create_lease_buf = smb2_create_lease_buf, .parse_lease_buf = smb2_parse_lease_buf, .copychunk_range = smb2_copychunk_range, .wp_retry_size = smb2_wp_retry_size, .dir_needs_close = smb2_dir_needs_close, .get_dfs_refer = smb2_get_dfs_refer, .select_sectype = smb2_select_sectype, #ifdef CONFIG_CIFS_XATTR .query_all_EAs = smb2_query_eas, .set_EA = smb2_set_ea, #endif /* CIFS_XATTR */ .get_acl = get_smb2_acl, .get_acl_by_fid = get_smb2_acl_by_fid, .set_acl = set_smb2_acl, .next_header = smb2_next_header, .ioctl_query_info = smb2_ioctl_query_info, .make_node = smb2_make_node, .fiemap = smb3_fiemap, .llseek = smb3_llseek, }; struct smb_version_operations smb21_operations = { .compare_fids = smb2_compare_fids, .setup_request = smb2_setup_request, .setup_async_request = smb2_setup_async_request, .check_receive = smb2_check_receive, .add_credits = smb2_add_credits, .set_credits = smb2_set_credits, .get_credits_field = smb2_get_credits_field, .get_credits = smb2_get_credits, .wait_mtu_credits = smb2_wait_mtu_credits, .adjust_credits = smb2_adjust_credits, .get_next_mid = smb2_get_next_mid, .revert_current_mid = smb2_revert_current_mid, .read_data_offset = smb2_read_data_offset, .read_data_length = smb2_read_data_length, .map_error = map_smb2_to_linux_error, .find_mid = smb2_find_mid, .check_message = smb2_check_message, .dump_detail = smb2_dump_detail, .clear_stats = smb2_clear_stats, .print_stats = smb2_print_stats, .is_oplock_break = smb2_is_valid_oplock_break, .handle_cancelled_mid = smb2_handle_cancelled_mid, .downgrade_oplock = smb21_downgrade_oplock, .need_neg = smb2_need_neg, .negotiate = smb2_negotiate, .negotiate_wsize = smb2_negotiate_wsize, .negotiate_rsize = smb2_negotiate_rsize, .sess_setup = SMB2_sess_setup, .logoff = SMB2_logoff, .tree_connect = SMB2_tcon, .tree_disconnect = SMB2_tdis, .qfs_tcon = smb2_qfs_tcon, .is_path_accessible = smb2_is_path_accessible, .can_echo = smb2_can_echo, .echo = SMB2_echo, .query_path_info = smb2_query_path_info, .get_srv_inum = smb2_get_srv_inum, .query_file_info = smb2_query_file_info, .set_path_size = smb2_set_path_size, .set_file_size = smb2_set_file_size, .set_file_info = smb2_set_file_info, .set_compression = smb2_set_compression, .mkdir = smb2_mkdir, .mkdir_setinfo = smb2_mkdir_setinfo, .rmdir = smb2_rmdir, .unlink = smb2_unlink, .rename = smb2_rename_path, .create_hardlink = smb2_create_hardlink, .query_symlink = smb2_query_symlink, .query_mf_symlink = smb3_query_mf_symlink, .create_mf_symlink = smb3_create_mf_symlink, .open = smb2_open_file, .set_fid = smb2_set_fid, .close = smb2_close_file, .flush = smb2_flush_file, .async_readv = smb2_async_readv, .async_writev = smb2_async_writev, .sync_read = smb2_sync_read, .sync_write = smb2_sync_write, .query_dir_first = smb2_query_dir_first, .query_dir_next = smb2_query_dir_next, .close_dir = smb2_close_dir, .calc_smb_size = smb2_calc_size, .is_status_pending = smb2_is_status_pending, .is_session_expired = smb2_is_session_expired, .oplock_response = smb2_oplock_response, .queryfs = smb2_queryfs, .mand_lock = smb2_mand_lock, .mand_unlock_range = smb2_unlock_range, .push_mand_locks = smb2_push_mandatory_locks, .get_lease_key = smb2_get_lease_key, .set_lease_key = smb2_set_lease_key, .new_lease_key = smb2_new_lease_key, .calc_signature = smb2_calc_signature, .is_read_op = smb21_is_read_op, .set_oplock_level = smb21_set_oplock_level, .create_lease_buf = smb2_create_lease_buf, .parse_lease_buf = smb2_parse_lease_buf, .copychunk_range = smb2_copychunk_range, .wp_retry_size = smb2_wp_retry_size, .dir_needs_close = smb2_dir_needs_close, .enum_snapshots = smb3_enum_snapshots, .get_dfs_refer = smb2_get_dfs_refer, .select_sectype = smb2_select_sectype, #ifdef CONFIG_CIFS_XATTR .query_all_EAs = smb2_query_eas, .set_EA = smb2_set_ea, #endif /* CIFS_XATTR */ .get_acl = get_smb2_acl, .get_acl_by_fid = get_smb2_acl_by_fid, .set_acl = set_smb2_acl, .next_header = smb2_next_header, .ioctl_query_info = smb2_ioctl_query_info, .make_node = smb2_make_node, .fiemap = smb3_fiemap, .llseek = smb3_llseek, }; struct smb_version_operations smb30_operations = { .compare_fids = smb2_compare_fids, .setup_request = smb2_setup_request, .setup_async_request = smb2_setup_async_request, .check_receive = smb2_check_receive, .add_credits = smb2_add_credits, .set_credits = smb2_set_credits, .get_credits_field = smb2_get_credits_field, .get_credits = smb2_get_credits, .wait_mtu_credits = smb2_wait_mtu_credits, .adjust_credits = smb2_adjust_credits, .get_next_mid = smb2_get_next_mid, .revert_current_mid = smb2_revert_current_mid, .read_data_offset = smb2_read_data_offset, .read_data_length = smb2_read_data_length, .map_error = map_smb2_to_linux_error, .find_mid = smb2_find_mid, .check_message = smb2_check_message, .dump_detail = smb2_dump_detail, .clear_stats = smb2_clear_stats, .print_stats = smb2_print_stats, .dump_share_caps = smb2_dump_share_caps, .is_oplock_break = smb2_is_valid_oplock_break, .handle_cancelled_mid = smb2_handle_cancelled_mid, .downgrade_oplock = smb21_downgrade_oplock, .need_neg = smb2_need_neg, .negotiate = smb2_negotiate, .negotiate_wsize = smb3_negotiate_wsize, .negotiate_rsize = smb3_negotiate_rsize, .sess_setup = SMB2_sess_setup, .logoff = SMB2_logoff, .tree_connect = SMB2_tcon, .tree_disconnect = SMB2_tdis, .qfs_tcon = smb3_qfs_tcon, .is_path_accessible = smb2_is_path_accessible, .can_echo = smb2_can_echo, .echo = SMB2_echo, .query_path_info = smb2_query_path_info, .get_srv_inum = smb2_get_srv_inum, .query_file_info = smb2_query_file_info, .set_path_size = smb2_set_path_size, .set_file_size = smb2_set_file_size, .set_file_info = smb2_set_file_info, .set_compression = smb2_set_compression, .mkdir = smb2_mkdir, .mkdir_setinfo = smb2_mkdir_setinfo, .rmdir = smb2_rmdir, .unlink = smb2_unlink, .rename = smb2_rename_path, .create_hardlink = smb2_create_hardlink, .query_symlink = smb2_query_symlink, .query_mf_symlink = smb3_query_mf_symlink, .create_mf_symlink = smb3_create_mf_symlink, .open = smb2_open_file, .set_fid = smb2_set_fid, .close = smb2_close_file, .flush = smb2_flush_file, .async_readv = smb2_async_readv, .async_writev = smb2_async_writev, .sync_read = smb2_sync_read, .sync_write = smb2_sync_write, .query_dir_first = smb2_query_dir_first, .query_dir_next = smb2_query_dir_next, .close_dir = smb2_close_dir, .calc_smb_size = smb2_calc_size, .is_status_pending = smb2_is_status_pending, .is_session_expired = smb2_is_session_expired, .oplock_response = smb2_oplock_response, .queryfs = smb2_queryfs, .mand_lock = smb2_mand_lock, .mand_unlock_range = smb2_unlock_range, .push_mand_locks = smb2_push_mandatory_locks, .get_lease_key = smb2_get_lease_key, .set_lease_key = smb2_set_lease_key, .new_lease_key = smb2_new_lease_key, .generate_signingkey = generate_smb30signingkey, .calc_signature = smb3_calc_signature, .set_integrity = smb3_set_integrity, .is_read_op = smb21_is_read_op, .set_oplock_level = smb3_set_oplock_level, .create_lease_buf = smb3_create_lease_buf, .parse_lease_buf = smb3_parse_lease_buf, .copychunk_range = smb2_copychunk_range, .duplicate_extents = smb2_duplicate_extents, .validate_negotiate = smb3_validate_negotiate, .wp_retry_size = smb2_wp_retry_size, .dir_needs_close = smb2_dir_needs_close, .fallocate = smb3_fallocate, .enum_snapshots = smb3_enum_snapshots, .init_transform_rq = smb3_init_transform_rq, .is_transform_hdr = smb3_is_transform_hdr, .receive_transform = smb3_receive_transform, .get_dfs_refer = smb2_get_dfs_refer, .select_sectype = smb2_select_sectype, #ifdef CONFIG_CIFS_XATTR .query_all_EAs = smb2_query_eas, .set_EA = smb2_set_ea, #endif /* CIFS_XATTR */ .get_acl = get_smb2_acl, .get_acl_by_fid = get_smb2_acl_by_fid, .set_acl = set_smb2_acl, .next_header = smb2_next_header, .ioctl_query_info = smb2_ioctl_query_info, .make_node = smb2_make_node, .fiemap = smb3_fiemap, .llseek = smb3_llseek, }; struct smb_version_operations smb311_operations = { .compare_fids = smb2_compare_fids, .setup_request = smb2_setup_request, .setup_async_request = smb2_setup_async_request, .check_receive = smb2_check_receive, .add_credits = smb2_add_credits, .set_credits = smb2_set_credits, .get_credits_field = smb2_get_credits_field, .get_credits = smb2_get_credits, .wait_mtu_credits = smb2_wait_mtu_credits, .adjust_credits = smb2_adjust_credits, .get_next_mid = smb2_get_next_mid, .revert_current_mid = smb2_revert_current_mid, .read_data_offset = smb2_read_data_offset, .read_data_length = smb2_read_data_length, .map_error = map_smb2_to_linux_error, .find_mid = smb2_find_mid, .check_message = smb2_check_message, .dump_detail = smb2_dump_detail, .clear_stats = smb2_clear_stats, .print_stats = smb2_print_stats, .dump_share_caps = smb2_dump_share_caps, .is_oplock_break = smb2_is_valid_oplock_break, .handle_cancelled_mid = smb2_handle_cancelled_mid, .downgrade_oplock = smb21_downgrade_oplock, .need_neg = smb2_need_neg, .negotiate = smb2_negotiate, .negotiate_wsize = smb3_negotiate_wsize, .negotiate_rsize = smb3_negotiate_rsize, .sess_setup = SMB2_sess_setup, .logoff = SMB2_logoff, .tree_connect = SMB2_tcon, .tree_disconnect = SMB2_tdis, .qfs_tcon = smb3_qfs_tcon, .is_path_accessible = smb2_is_path_accessible, .can_echo = smb2_can_echo, .echo = SMB2_echo, .query_path_info = smb2_query_path_info, .get_srv_inum = smb2_get_srv_inum, .query_file_info = smb2_query_file_info, .set_path_size = smb2_set_path_size, .set_file_size = smb2_set_file_size, .set_file_info = smb2_set_file_info, .set_compression = smb2_set_compression, .mkdir = smb2_mkdir, .mkdir_setinfo = smb2_mkdir_setinfo, .posix_mkdir = smb311_posix_mkdir, .rmdir = smb2_rmdir, .unlink = smb2_unlink, .rename = smb2_rename_path, .create_hardlink = smb2_create_hardlink, .query_symlink = smb2_query_symlink, .query_mf_symlink = smb3_query_mf_symlink, .create_mf_symlink = smb3_create_mf_symlink, .open = smb2_open_file, .set_fid = smb2_set_fid, .close = smb2_close_file, .flush = smb2_flush_file, .async_readv = smb2_async_readv, .async_writev = smb2_async_writev, .sync_read = smb2_sync_read, .sync_write = smb2_sync_write, .query_dir_first = smb2_query_dir_first, .query_dir_next = smb2_query_dir_next, .close_dir = smb2_close_dir, .calc_smb_size = smb2_calc_size, .is_status_pending = smb2_is_status_pending, .is_session_expired = smb2_is_session_expired, .oplock_response = smb2_oplock_response, .queryfs = smb311_queryfs, .mand_lock = smb2_mand_lock, .mand_unlock_range = smb2_unlock_range, .push_mand_locks = smb2_push_mandatory_locks, .get_lease_key = smb2_get_lease_key, .set_lease_key = smb2_set_lease_key, .new_lease_key = smb2_new_lease_key, .generate_signingkey = generate_smb311signingkey, .calc_signature = smb3_calc_signature, .set_integrity = smb3_set_integrity, .is_read_op = smb21_is_read_op, .set_oplock_level = smb3_set_oplock_level, .create_lease_buf = smb3_create_lease_buf, .parse_lease_buf = smb3_parse_lease_buf, .copychunk_range = smb2_copychunk_range, .duplicate_extents = smb2_duplicate_extents, /* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */ .wp_retry_size = smb2_wp_retry_size, .dir_needs_close = smb2_dir_needs_close, .fallocate = smb3_fallocate, .enum_snapshots = smb3_enum_snapshots, .init_transform_rq = smb3_init_transform_rq, .is_transform_hdr = smb3_is_transform_hdr, .receive_transform = smb3_receive_transform, .get_dfs_refer = smb2_get_dfs_refer, .select_sectype = smb2_select_sectype, #ifdef CONFIG_CIFS_XATTR .query_all_EAs = smb2_query_eas, .set_EA = smb2_set_ea, #endif /* CIFS_XATTR */ .get_acl = get_smb2_acl, .get_acl_by_fid = get_smb2_acl_by_fid, .set_acl = set_smb2_acl, .next_header = smb2_next_header, .ioctl_query_info = smb2_ioctl_query_info, .make_node = smb2_make_node, .fiemap = smb3_fiemap, .llseek = smb3_llseek, }; struct smb_version_values smb20_values = { .version_string = SMB20_VERSION_STRING, .protocol_id = SMB20_PROT_ID, .req_capabilities = 0, /* MBZ */ .large_lock_type = 0, .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK, .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK, .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, .header_size = sizeof(struct smb2_sync_hdr), .header_preamble_size = 0, .max_header_size = MAX_SMB2_HDR_SIZE, .read_rsp_size = sizeof(struct smb2_read_rsp) - 1, .lock_cmd = SMB2_LOCK, .cap_unix = 0, .cap_nt_find = SMB2_NT_FIND, .cap_large_files = SMB2_LARGE_FILES, .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, .create_lease_size = sizeof(struct create_lease), }; struct smb_version_values smb21_values = { .version_string = SMB21_VERSION_STRING, .protocol_id = SMB21_PROT_ID, .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */ .large_lock_type = 0, .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK, .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK, .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, .header_size = sizeof(struct smb2_sync_hdr), .header_preamble_size = 0, .max_header_size = MAX_SMB2_HDR_SIZE, .read_rsp_size = sizeof(struct smb2_read_rsp) - 1, .lock_cmd = SMB2_LOCK, .cap_unix = 0, .cap_nt_find = SMB2_NT_FIND, .cap_large_files = SMB2_LARGE_FILES, .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, .create_lease_size = sizeof(struct create_lease), }; struct smb_version_values smb3any_values = { .version_string = SMB3ANY_VERSION_STRING, .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */ .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING, .large_lock_type = 0, .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK, .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK, .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, .header_size = sizeof(struct smb2_sync_hdr), .header_preamble_size = 0, .max_header_size = MAX_SMB2_HDR_SIZE, .read_rsp_size = sizeof(struct smb2_read_rsp) - 1, .lock_cmd = SMB2_LOCK, .cap_unix = 0, .cap_nt_find = SMB2_NT_FIND, .cap_large_files = SMB2_LARGE_FILES, .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, .create_lease_size = sizeof(struct create_lease_v2), }; struct smb_version_values smbdefault_values = { .version_string = SMBDEFAULT_VERSION_STRING, .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */ .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING, .large_lock_type = 0, .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK, .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK, .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, .header_size = sizeof(struct smb2_sync_hdr), .header_preamble_size = 0, .max_header_size = MAX_SMB2_HDR_SIZE, .read_rsp_size = sizeof(struct smb2_read_rsp) - 1, .lock_cmd = SMB2_LOCK, .cap_unix = 0, .cap_nt_find = SMB2_NT_FIND, .cap_large_files = SMB2_LARGE_FILES, .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, .create_lease_size = sizeof(struct create_lease_v2), }; struct smb_version_values smb30_values = { .version_string = SMB30_VERSION_STRING, .protocol_id = SMB30_PROT_ID, .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING, .large_lock_type = 0, .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK, .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK, .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, .header_size = sizeof(struct smb2_sync_hdr), .header_preamble_size = 0, .max_header_size = MAX_SMB2_HDR_SIZE, .read_rsp_size = sizeof(struct smb2_read_rsp) - 1, .lock_cmd = SMB2_LOCK, .cap_unix = 0, .cap_nt_find = SMB2_NT_FIND, .cap_large_files = SMB2_LARGE_FILES, .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, .create_lease_size = sizeof(struct create_lease_v2), }; struct smb_version_values smb302_values = { .version_string = SMB302_VERSION_STRING, .protocol_id = SMB302_PROT_ID, .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING, .large_lock_type = 0, .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK, .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK, .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, .header_size = sizeof(struct smb2_sync_hdr), .header_preamble_size = 0, .max_header_size = MAX_SMB2_HDR_SIZE, .read_rsp_size = sizeof(struct smb2_read_rsp) - 1, .lock_cmd = SMB2_LOCK, .cap_unix = 0, .cap_nt_find = SMB2_NT_FIND, .cap_large_files = SMB2_LARGE_FILES, .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, .create_lease_size = sizeof(struct create_lease_v2), }; struct smb_version_values smb311_values = { .version_string = SMB311_VERSION_STRING, .protocol_id = SMB311_PROT_ID, .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING, .large_lock_type = 0, .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK, .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK, .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, .header_size = sizeof(struct smb2_sync_hdr), .header_preamble_size = 0, .max_header_size = MAX_SMB2_HDR_SIZE, .read_rsp_size = sizeof(struct smb2_read_rsp) - 1, .lock_cmd = SMB2_LOCK, .cap_unix = 0, .cap_nt_find = SMB2_NT_FIND, .cap_large_files = SMB2_LARGE_FILES, .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, .create_lease_size = sizeof(struct create_lease_v2), };