| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * SMB2 version specific operations |
| * |
| * Copyright (c) 2012, Jeff Layton <jlayton@redhat.com> |
| */ |
| |
| #include <linux/pagemap.h> |
| #include <linux/vfs.h> |
| #include <linux/falloc.h> |
| #include <linux/scatterlist.h> |
| #include <linux/uuid.h> |
| #include <linux/sort.h> |
| #include <crypto/aead.h> |
| #include "cifsfs.h" |
| #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_server_dbg(VFS, "Possible client or server bug - zero credits\n"); |
| break; |
| case 1: |
| cifs_server_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) |
| { |
| return mid->credits_received; |
| } |
| |
| 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++; |
| if (server->in_flight > server->max_in_flight) |
| server->max_in_flight = 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_server_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_server_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_server_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_server_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; |
| |
| cifs_ses_server(ses)->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); |
| 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) |
| /* |
| * Account for SMB2 data transfer packet header and |
| * possible encryption header |
| */ |
| wsize = min_t(unsigned int, |
| wsize, |
| server->smbd_conn->max_fragmented_send_size - |
| SMB2_READWRITE_PDU_HEADER_SIZE - |
| sizeof(struct smb2_transform_hdr)); |
| 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); |
| |
| 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) |
| /* |
| * Account for SMB2 data transfer packet header and |
| * possible encryption header |
| */ |
| rsize = min_t(unsigned int, |
| rsize, |
| server->smbd_conn->max_fragmented_recv_size - |
| SMB2_READWRITE_PDU_HEADER_SIZE - |
| sizeof(struct smb2_transform_hdr)); |
| 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 compare_iface(const void *ia, const void *ib) |
| { |
| const struct cifs_server_iface *a = (struct cifs_server_iface *)ia; |
| const struct cifs_server_iface *b = (struct cifs_server_iface *)ib; |
| |
| return a->speed == b->speed ? 0 : (a->speed > b->speed ? -1 : 1); |
| } |
| |
| 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_tcon_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; |
| |
| /* sort interfaces from fastest to slowest */ |
| sort(iface_list, iface_count, sizeof(*iface_list), compare_iface, NULL); |
| |
| 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; |
| cfid->has_lease = 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 close_shroot_lease_locked(struct cached_fid *cfid) |
| { |
| if (cfid->has_lease) { |
| cfid->has_lease = false; |
| kref_put(&cfid->refcount, smb2_close_cached_fid); |
| } |
| } |
| |
| void close_shroot_lease(struct cached_fid *cfid) |
| { |
| mutex_lock(&cfid->fid_mutex); |
| close_shroot_lease_locked(cfid); |
| 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_lease(cfid); |
| } |
| |
| /* |
| * Open the directory at the root of a share |
| */ |
| int open_shroot(unsigned int xid, struct cifs_tcon *tcon, |
| struct cifs_sb_info *cifs_sb, 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; |
| } |
| |
| /* |
| * We do not hold the lock for the open because in case |
| * SMB2_open needs to reconnect, it will end up calling |
| * cifs_mark_open_files_invalid() which takes the lock again |
| * thus causing a deadlock |
| */ |
| |
| mutex_unlock(&tcon->crfid.fid_mutex); |
| |
| if (smb3_encryption_required(tcon)) |
| flags |= CIFS_TRANSFORM_REQ; |
| |
| if (!server->ops->new_lease_key) |
| return -EIO; |
| |
| server->ops->new_lease_key(pfid); |
| |
| 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 = cifs_create_options(cifs_sb, 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_free; |
| 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_free; |
| |
| smb2_set_related(&rqst[1]); |
| |
| rc = compound_send_recv(xid, ses, flags, 2, rqst, |
| resp_buftype, rsp_iov); |
| mutex_lock(&tcon->crfid.fid_mutex); |
| |
| /* |
| * Now we need to check again as the cached root might have |
| * been successfully re-opened from a concurrent process |
| */ |
| |
| if (tcon->crfid.is_valid) { |
| /* work was already done */ |
| |
| /* stash fids for close() later */ |
| struct cifs_fid fid = { |
| .persistent_fid = pfid->persistent_fid, |
| .volatile_fid = pfid->volatile_fid, |
| }; |
| |
| /* |
| * caller expects this func to set pfid to a valid |
| * cached root, so we copy the existing one and get a |
| * reference. |
| */ |
| memcpy(pfid, tcon->crfid.fid, sizeof(*pfid)); |
| kref_get(&tcon->crfid.refcount); |
| |
| mutex_unlock(&tcon->crfid.fid_mutex); |
| |
| if (rc == 0) { |
| /* close extra handle outside of crit sec */ |
| SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); |
| } |
| goto oshr_free; |
| } |
| |
| /* Cached root is still invalid, continue normaly */ |
| |
| if (rc) { |
| if (rc == -EREMCHG) { |
| tcon->need_reconnect = true; |
| printk_once(KERN_WARNING "server share %s deleted\n", |
| tcon->treeName); |
| } |
| goto oshr_exit; |
| } |
| |
| atomic_inc(&tcon->num_remote_opens); |
| |
| 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); |
| |
| /* BB TBD check to see if oplock level check can be removed below */ |
| if (o_rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE) { |
| kref_get(&tcon->crfid.refcount); |
| tcon->crfid.has_lease = true; |
| smb2_parse_contexts(server, o_rsp, |
| &oparms.fid->epoch, |
| oparms.fid->lease_key, &oplock, |
| NULL, NULL); |
| } 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 = true; |
| |
| oshr_exit: |
| mutex_unlock(&tcon->crfid.fid_mutex); |
| oshr_free: |
| 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, |
| struct cifs_sb_info *cifs_sb) |
| { |
| 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 = cifs_create_options(cifs_sb, 0); |
| oparms.fid = &fid; |
| oparms.reconnect = false; |
| |
| if (no_cached_open) |
| rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, |
| NULL, NULL); |
| else |
| rc = open_shroot(xid, tcon, cifs_sb, &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, |
| struct cifs_sb_info *cifs_sb) |
| { |
| 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 = cifs_create_options(cifs_sb, 0); |
| oparms.fid = &fid; |
| oparms.reconnect = false; |
| |
| rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, 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; |
| oparms.create_options = cifs_create_options(cifs_sb, 0); |
| oparms.fid = &fid; |
| oparms.reconnect = false; |
| |
| rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, 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]; |
| struct smb2_query_info_rsp *rsp; |
| int rc, used_len = 0; |
| |
| 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; |
| } else { |
| /* If we are adding a attribute we should first check |
| * if there will be enough space available to store |
| * the new EA. If not we should not add it since we |
| * would not be able to even read the EAs back. |
| */ |
| 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[1], &resp_buftype[1], cifs_sb); |
| if (rc == 0) { |
| rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base; |
| used_len = le32_to_cpu(rsp->OutputBufferLength); |
| } |
| free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); |
| resp_buftype[1] = CIFS_NO_BUFFER; |
| memset(&rsp_iov[1], 0, sizeof(rsp_iov[1])); |
| rc = 0; |
| |
| /* Use a fudge factor of 256 bytes in case we collide |
| * with a different set_EAs command. |
| */ |
| if(CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE - |
| MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 < |
| used_len + ea_name_len + ea_value_len + 1) { |
| rc = -ENOSPC; |
| 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; |
| oparms.create_options = cifs_create_options(cifs_sb, 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, false); |
| smb2_set_related(&rqst[2]); |
| |
| rc = compound_send_recv(xid, ses, flags, 3, rqst, |
| resp_buftype, rsp_iov); |
| /* no need to bump num_remote_opens because handle immediately closed */ |
| |
| 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; |
| cfile->fid.access = fid->access; |
| #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 void |
| smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon, |
| struct cifsFileInfo *cfile) |
| { |
| struct smb2_file_network_open_info file_inf; |
| struct inode *inode; |
| int rc; |
| |
| rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid, |
| cfile->fid.volatile_fid, &file_inf); |
| if (rc) |
| return; |
| |
| inode = d_inode(cfile->dentry); |
| |
| spin_lock(&inode->i_lock); |
| CIFS_I(inode)->time = jiffies; |
| |
| /* Creation time should not need to be updated on close */ |
| if (file_inf.LastWriteTime) |
| inode->i_mtime = cifs_NTtimeToUnix(file_inf.LastWriteTime); |
| if (file_inf.ChangeTime) |
| inode->i_ctime = cifs_NTtimeToUnix(file_inf.ChangeTime); |
| if (file_inf.LastAccessTime) |
| inode->i_atime = cifs_NTtimeToUnix(file_inf.LastAccessTime); |
| |
| /* |
| * i_blocks is not related to (i_size / i_blksize), |
| * but instead 512 byte (2**9) size is required for |
| * calculating num blocks. |
| */ |
| if (le64_to_cpu(file_inf.AllocationSize) > 4096) |
| inode->i_blocks = |
| (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9; |
| |
| /* End of file and Attributes should not have to be updated on close */ |
| spin_unlock(&inode->i_lock); |
| } |
| |
| 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_tcon_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_tcon_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, |
| struct cifs_sb_info *cifs_sb, |
| __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 si_iov[SMB2_SET_INFO_IOV_SIZE]; |
| struct kvec close_iov[1]; |
| unsigned int size[2]; |
| void *data[2]; |
| int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR; |
| |
| 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 = memdup_user(arg + sizeof(struct smb_query_info), |
| qi.output_buffer_length); |
| if (IS_ERR(buffer)) |
| return PTR_ERR(buffer); |
| |
| /* 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.disposition = FILE_OPEN; |
| oparms.create_options = cifs_create_options(cifs_sb, create_options); |
| oparms.fid = &fid; |
| oparms.reconnect = false; |
| |
| 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; |
| } |
| } else if (qi.flags & PASSTHRU_SET_INFO) { |
| oparms.desired_access = GENERIC_WRITE; |
| } else { |
| oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL; |
| } |
| |
| 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 - |
| MAX_SMB2_CREATE_RESPONSE_SIZE - |
| MAX_SMB2_CLOSE_RESPONSE_SIZE); |
| } |
| } else if (qi.flags == PASSTHRU_SET_INFO) { |
| /* Can eventually relax perm check since server enforces too */ |
| if (!capable(CAP_SYS_ADMIN)) |
| rc = -EPERM; |
| else { |
| memset(&si_iov, 0, sizeof(si_iov)); |
| rqst[1].rq_iov = si_iov; |
| rqst[1].rq_nvec = 1; |
| |
| size[0] = 8; |
| data[0] = buffer; |
| |
| rc = SMB2_set_info_init(tcon, &rqst[1], |
| COMPOUND_FID, COMPOUND_FID, |
| current->tgid, |
| FILE_END_OF_FILE_INFORMATION, |
| SMB2_O_INFO_FILE, 0, data, size); |
| } |
| } 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_tcon_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, false); |
| 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; |
| |
| /* No need to bump num_remote_opens since handle immediately closed */ |
| 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) |
| goto e_fault; |
| |
| if (copy_to_user(&pqi->input_buffer_length, |
| &qi.input_buffer_length, |
| sizeof(qi.input_buffer_length))) |
| goto e_fault; |
| |
| 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)) |
| goto e_fault; |
| } 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))) |
| goto e_fault; |
| |
| if (copy_to_user(pqi + 1, qi_rsp->Buffer, |
| qi.input_buffer_length)) |
| goto e_fault; |
| } |
| |
| 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; |
| |
| e_fault: |
| rc = -EFAULT; |
| goto iqinf_exit; |
| } |
| |
| 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_tcon_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_tcon_dbg(VFS, "invalid copy chunk response\n"); |
| rc = -EIO; |
| goto cchunk_out; |
| } |
| if (le32_to_cpu(retbuf->ChunksWritten) != 1) { |
| cifs_tcon_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 |
| smb3_notify(const unsigned int xid, struct file *pfile, |
| void __user *ioc_buf) |
| { |
| struct smb3_notify notify; |
| struct dentry *dentry = pfile->f_path.dentry; |
| struct inode *inode = file_inode(pfile); |
| struct cifs_sb_info *cifs_sb; |
| struct cifs_open_parms oparms; |
| struct cifs_fid fid; |
| struct cifs_tcon *tcon; |
| unsigned char *path = NULL; |
| __le16 *utf16_path = NULL; |
| u8 oplock = SMB2_OPLOCK_LEVEL_NONE; |
| int rc = 0; |
| |
| path = build_path_from_dentry(dentry); |
| if (path == NULL) |
| return -ENOMEM; |
| |
| cifs_sb = CIFS_SB(inode->i_sb); |
| |
| utf16_path = cifs_convert_path_to_utf16(path + 1, cifs_sb); |
| if (utf16_path == NULL) { |
| rc = -ENOMEM; |
| goto notify_exit; |
| } |
| |
| if (copy_from_user(¬ify, ioc_buf, sizeof(struct smb3_notify))) { |
| rc = -EFAULT; |
| goto notify_exit; |
| } |
| |
| tcon = cifs_sb_master_tcon(cifs_sb); |
| oparms.tcon = tcon; |
| oparms.desired_access = FILE_READ_ATTRIBUTES; |
| oparms.disposition = FILE_OPEN; |
| oparms.create_options = cifs_create_options(cifs_sb, 0); |
| oparms.fid = &fid; |
| oparms.reconnect = false; |
| |
| rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL, |
| NULL); |
| if (rc) |
| goto notify_exit; |
| |
| rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid, |
| notify.watch_tree, notify.completion_filter); |
| |
| SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); |
| |
| cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc); |
| |
| notify_exit: |
| kfree(path); |
| kfree(utf16_path); |
| 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; |
| struct smb_rqst rqst[2]; |
| struct kvec rsp_iov[2]; |
| int resp_buftype[2]; |
| struct kvec open_iov[SMB2_CREATE_IOV_SIZE]; |
| struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE]; |
| int rc, flags = 0; |
| u8 oplock = SMB2_OPLOCK_LEVEL_NONE; |
| struct cifs_open_parms oparms; |
| struct smb2_query_directory_rsp *qd_rsp = NULL; |
| struct smb2_create_rsp *op_rsp = NULL; |
| |
| utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); |
| if (!utf16_path) |
| return -ENOMEM; |
| |
| 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.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA; |
| oparms.disposition = FILE_OPEN; |
| oparms.create_options = cifs_create_options(cifs_sb, 0); |
| oparms.fid = fid; |
| oparms.reconnect = false; |
| |
| rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path); |
| if (rc) |
| goto qdf_free; |
| smb2_set_next_command(tcon, &rqst[0]); |
| |
| /* Query directory */ |
| srch_inf->entries_in_buffer = 0; |
| srch_inf->index_of_last_entry = 2; |
| |
| memset(&qd_iov, 0, sizeof(qd_iov)); |
| rqst[1].rq_iov = qd_iov; |
| rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE; |
| |
| rc = SMB2_query_directory_init(xid, tcon, &rqst[1], |
| COMPOUND_FID, COMPOUND_FID, |
| 0, srch_inf->info_level); |
| if (rc) |
| goto qdf_free; |
| |
| smb2_set_related(&rqst[1]); |
| |
| rc = compound_send_recv(xid, tcon->ses, flags, 2, rqst, |
| resp_buftype, rsp_iov); |
| |
| /* If the open failed there is nothing to do */ |
| op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base; |
| if (op_rsp == NULL || op_rsp->sync_hdr.Status != STATUS_SUCCESS) { |
| cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc); |
| goto qdf_free; |
| } |
| fid->persistent_fid = op_rsp->PersistentFileId; |
| fid->volatile_fid = op_rsp->VolatileFileId; |
| |
| /* Anything else than ENODATA means a genuine error */ |
| if (rc && rc != -ENODATA) { |
| SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); |
| cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc); |
| trace_smb3_query_dir_err(xid, fid->persistent_fid, |
| tcon->tid, tcon->ses->Suid, 0, 0, rc); |
| goto qdf_free; |
| } |
| |
| atomic_inc(&tcon->num_remote_opens); |
| |
| qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base; |
| if (qd_rsp->sync_hdr.Status == STATUS_NO_MORE_FILES) { |
| trace_smb3_query_dir_done(xid, fid->persistent_fid, |
| tcon->tid, tcon->ses->Suid, 0, 0); |
| srch_inf->endOfSearch = true; |
| rc = 0; |
| goto qdf_free; |
| } |
| |
| rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1], |
| srch_inf); |
| if (rc) { |
| trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid, |
| tcon->ses->Suid, 0, 0, rc); |
| goto qdf_free; |
| } |
| resp_buftype[1] = CIFS_NO_BUFFER; |
| |
| trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid, |
| tcon->ses->Suid, 0, srch_inf->entries_in_buffer); |
| |
| qdf_free: |
| kfree(utf16_path); |
| SMB2_open_free(&rqst[0]); |
| SMB2_query_directory_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 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; |
| oparms.create_options = cifs_create_options(cifs_sb, 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, false); |
| 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); |
| if (rc == -EREMCHG) { |
| tcon->need_reconnect = true; |
| printk_once(KERN_WARNING "server share %s deleted\n", |
| tcon->treeName); |
| } |
| 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 cifs_sb_info *cifs_sb, 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, cifs_sb); |
| 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 cifs_sb_info *cifs_sb, 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, cifs_sb, buf); |
| |
| oparms.tcon = tcon; |
| oparms.desired_access = FILE_READ_ATTRIBUTES; |
| oparms.disposition = FILE_OPEN; |
| oparms.create_options = cifs_create_options(cifs_sb, 0); |
| oparms.fid = &fid; |
| oparms.reconnect = false; |
| |
| rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, 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_tcon_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_tcon_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; |
| int create_options = is_reparse_point ? OPEN_REPARSE_POINT : 0; |
| 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; |
| oparms.create_options = cifs_create_options(cifs_sb, create_options); |
| 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 - |
| MAX_SMB2_CREATE_RESPONSE_SIZE - |
| MAX_SMB2_CLOSE_RESPONSE_SIZE); |
| 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, false); |
| 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_tcon_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(); |
| |
| 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.create_options = cifs_create_options(cifs_sb, 0); |
| oparms.fid = &fid; |
| oparms.reconnect = false; |
| |
| rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, 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 (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.create_options = cifs_create_options(cifs_sb, 0); |
| oparms.disposition = FILE_OPEN; |
| oparms.path = path; |
| oparms.fid = &fid; |
| oparms.reconnect = false; |
| |
| rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, 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 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); |
| |
| /* 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; |
| } |
| |
| /* |
| * Extending the file |
| */ |
| if ((keep_size == false) && i_size_read(inode) < off + len) { |
| rc = inode_newsize_ok(inode, off + len); |
| if (rc) |
| goto out; |
| |
| if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) |
| smb2_set_sparse(xid, tcon, cfile, inode, false); |
| |
| 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 == 0) { |
| cifsi->server_eof = off + len; |
| cifs_setsize(inode, off + len); |
| cifs_truncate_page(inode->i_mapping, inode->i_size); |
| truncate_setsize(inode, off + len); |
| } |
| goto out; |
| } |
| |
| /* |
| * Files are non-sparse by default so falloc may be a no-op |
| * Must check if file sparse. If not sparse, and since we are not |
| * extending then no need to do anything since file already allocated |
| */ |
| if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) { |
| rc = 0; |
| goto out; |
| } |
| |
| 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; |
| goto out; |
| } |
| } |
| |
| smb2_set_sparse(xid, tcon, cfile, inode, false); |
| rc = 0; |
| |
| out: |
| 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, FIND_WR_ANY); |
| 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 && 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, __u32 oplock, |
| unsigned int epoch, bool *purge_cache) |
| { |
| server->ops->set_oplock_level(cinode, oplock, 0, NULL); |
| } |
| |
| static void |
| smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, |
| unsigned int epoch, bool *purge_cache); |
| |
| static void |
| smb3_downgrade_oplock(struct TCP_Server_Info *server, |
| struct cifsInodeInfo *cinode, __u32 oplock, |
| unsigned int epoch, bool *purge_cache) |
| { |
| unsigned int old_state = cinode->oplock; |
| unsigned int old_epoch = cinode->epoch; |
| unsigned int new_state; |
| |
| if (epoch > old_epoch) { |
| smb21_set_oplock_level(cinode, oplock, 0, NULL); |
| cinode->epoch = epoch; |
| } |
| |
| new_state = cinode->oplock; |
| *purge_cache = false; |
| |
| if ((old_state & CIFS_CACHE_READ_FLG) != 0 && |
| (new_state & CIFS_CACHE_READ_FLG) == 0) |
| *purge_cache = true; |
| else if (old_state == new_state && (epoch - old_epoch > 1)) |
| *purge_cache = true; |
| } |
| |
| 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; |
| |
| /* Check if the server granted an oplock rather than a lease */ |
| if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE) |
| return smb2_set_oplock_level(cinode, oplock, epoch, |
| purge_cache); |
| |
| 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) |
| { |
| void *addr; |
| /* |
| * VMAP_STACK (at least) puts stack into the vmalloc address space |
| */ |
| if (is_vmalloc_addr(buf)) |
| addr = vmalloc_to_page(buf); |
| else |
| addr = virt_to_page(buf); |
| sg_set_page(sg, addr, 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(server, &cifs_tcp_ses_list, tcp_ses_list) { |
| list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { |
| if (ses->Suid == ses_id) { |
| 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_server_dbg(VFS, "%s: Could not get %scryption key\n", __func__, |
| enc ? "en" : "de"); |
| return 0; |
| } |
| |
| rc = smb3_crypto_aead_allocate(server); |
| if (rc) { |
| cifs_server_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_server_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_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc); |
| return rc; |
| } |
| |
| req = aead_request_alloc(tfm, GFP_KERNEL); |
| if (!req) { |
| cifs_server_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_server_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_server_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_server_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); |
| 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; |
| } |
| |
| struct smb2_decrypt_work { |
| struct work_struct decrypt; |
| struct TCP_Server_Info *server; |
| struct page **ppages; |
| char *buf; |
| unsigned int npages; |
| unsigned int len; |
| }; |
| |
| |
| static void smb2_decrypt_offload(struct work_struct *work) |
| { |
| struct smb2_decrypt_work *dw = container_of(work, |
| struct smb2_decrypt_work, decrypt); |
| int i, rc; |
| struct mid_q_entry *mid; |
| |
| rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size, |
| dw->ppages, dw->npages, dw->len); |
| if (rc) { |
| cifs_dbg(VFS, "error decrypting rc=%d\n", rc); |
| goto free_pages; |
| } |
| |
| dw->server->lstrp = jiffies; |
| mid = smb2_find_mid(dw->server, dw->buf); |
| if (mid == NULL) |
| cifs_dbg(FYI, "mid not found\n"); |
| else { |
| mid->decrypted = true; |
| rc = handle_read_data(dw->server, mid, dw->buf, |
| dw->server->vals->read_rsp_size, |
| dw->ppages, dw->npages, dw->len); |
| mid->callback(mid); |
| cifs_mid_q_entry_release(mid); |
| } |
| |
| free_pages: |
| for (i = dw->npages-1; i >= 0; i--) |
| put_page(dw->ppages[i]); |
| |
| kfree(dw->ppages); |
| cifs_small_buf_release(dw->buf); |
| kfree(dw); |
| } |
| |
| |
| static int |
| receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid, |
| int *num_mids) |
| { |
| 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; |
| struct smb2_decrypt_work *dw; |
| |
| *num_mids = 1; |
| 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; |
| |
| /* |
| * For large reads, offload to different thread for better performance, |
| * use more cores decrypting which can be expensive |
| */ |
| |
| if ((server->min_offload) && (server->in_flight > 1) && |
| (server->pdu_size >= server->min_offload)) { |
| dw = kmalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL); |
| if (dw == NULL) |
| goto non_offloaded_decrypt; |
| |
| dw->buf = server->smallbuf; |
| server->smallbuf = (char *)cifs_small_buf_get(); |
| |
| INIT_WORK(&dw->decrypt, smb2_decrypt_offload); |
| |
| dw->npages = npages; |
| dw->server = server; |
| dw->ppages = pages; |
| dw->len = len; |
| queue_work(decrypt_wq, &dw->decrypt); |
| *num_mids = 0; /* worker thread takes care of finding mid */ |
| return -1; |
| } |
| |
| non_offloaded_decrypt: |
| 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; |
| 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) |
| next_buffer = (char *)cifs_buf_get(); |
| else |
| next_buffer = (char *)cifs_small_buf_get(); |
| memcpy(next_buffer, |
| buf + 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_server_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 = buf = next_buffer; |
| else |
| server->smallbuf = buf = next_buffer; |
| goto one_more; |
| } else if (ret != 0) { |
| /* |
| * ret != 0 here means that we didn't get to handle_mid() thus |
| * server->smallbuf and server->bigbuf are still valid. We need |
| * to free next_buffer because it is not going to be used |
| * anywhere. |
| */ |
| if (next_is_large) |
| free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer); |
| else |
| free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer); |
| } |
| |
| 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_server_dbg(VFS, "Transform message is too small (%u)\n", |
| pdu_length); |
| cifs_reconnect(server); |
| return -ECONNABORTED; |
| } |
| |
| if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) { |
| cifs_server_dbg(VFS, "Transform message is broken\n"); |
| cifs_reconnect(server); |
| return -ECONNABORTED; |
| } |
| |
| /* TODO: add support for compounds containing READ. */ |
| if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) { |
| return receive_encrypted_read(server, &mids[0], num_mids); |
| } |
| |
| 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; |
| 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; |
| } |
| |
| oparms.tcon = tcon; |
| oparms.cifs_sb = cifs_sb; |
| oparms.desired_access = GENERIC_WRITE; |
| oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR | |
| CREATE_OPTION_SPECIAL); |
| 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 = 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 = 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, |
| .notify = smb3_notify, |
| .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 = smb3_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, |
| .close_getattr = smb2_close_getattr, |
| .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, |
| .notify = smb3_notify, |
| .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 = smb3_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, |
| .close_getattr = smb2_close_getattr, |
| .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, |
| .notify = smb3_notify, |
| .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), |
| }; |