| // 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 <linux/fiemap.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 */ |
| pr_warn_once("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, server, |
| &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, server, |
| &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, server, |
| 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; |
| pr_warn_once("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; |
| struct TCP_Server_Info *server = cifs_pick_channel(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, server, |
| &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, server, |
| &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, server, |
| &rqst[2], COMPOUND_FID, COMPOUND_FID, false); |
| smb2_set_related(&rqst[2]); |
| |
| rc = compound_send_recv(xid, ses, server, |
| 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; |
| } |
| |
| struct iqi_vars { |
| struct smb_rqst rqst[3]; |
| struct kvec rsp_iov[3]; |
| struct kvec open_iov[SMB2_CREATE_IOV_SIZE]; |
| 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]; |
| }; |
| |
| 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 iqi_vars *vars; |
| struct smb_rqst *rqst; |
| struct kvec *rsp_iov; |
| struct cifs_ses *ses = tcon->ses; |
| struct TCP_Server_Info *server = cifs_pick_channel(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; |
| int resp_buftype[3]; |
| struct cifs_open_parms oparms; |
| u8 oplock = SMB2_OPLOCK_LEVEL_NONE; |
| struct cifs_fid fid; |
| unsigned int size[2]; |
| void *data[2]; |
| int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR; |
| |
| vars = kzalloc(sizeof(*vars), GFP_ATOMIC); |
| if (vars == NULL) |
| return -ENOMEM; |
| rqst = &vars->rqst[0]; |
| rsp_iov = &vars->rsp_iov[0]; |
| |
| resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; |
| |
| if (copy_from_user(&qi, arg, sizeof(struct smb_query_info))) |
| goto e_fault; |
| |
| if (qi.output_buffer_length > 1024) { |
| kfree(vars); |
| return -EINVAL; |
| } |
| |
| if (!ses || !server) { |
| kfree(vars); |
| 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)) { |
| kfree(vars); |
| return PTR_ERR(buffer); |
| } |
| |
| /* Open */ |
| rqst[0].rq_iov = &vars->open_iov[0]; |
| 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, server, |
| &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 { |
| rqst[1].rq_iov = &vars->io_iov[0]; |
| rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE; |
| |
| rc = SMB2_ioctl_init(tcon, server, |
| &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 { |
| rqst[1].rq_iov = &vars->si_iov[0]; |
| rqst[1].rq_nvec = 1; |
| |
| size[0] = 8; |
| data[0] = buffer; |
| |
| rc = SMB2_set_info_init(tcon, server, |
| &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) { |
| rqst[1].rq_iov = &vars->qi_iov[0]; |
| rqst[1].rq_nvec = 1; |
| |
| rc = SMB2_query_info_init(tcon, server, |
| &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 */ |
| rqst[2].rq_iov = &vars->close_iov[0]; |
| rqst[2].rq_nvec = 1; |
| |
| rc = SMB2_close_init(tcon, server, |
| &rqst[2], COMPOUND_FID, COMPOUND_FID, false); |
| if (rc) |
| goto iqinf_exit; |
| smb2_set_related(&rqst[2]); |
| |
| rc = compound_send_recv(xid, ses, server, |
| 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(vars); |
| 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; |
| struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses); |
| |
| 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, server, |
| &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, server, |
| &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, server, |
| 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; |
| struct TCP_Server_Info *server = cifs_pick_channel(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, server, |
| &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, server, |
| &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, server, |
| &rqst[2], COMPOUND_FID, COMPOUND_FID, false); |
| if (rc) |
| goto qic_exit; |
| smb2_set_related(&rqst[2]); |
| |
| rc = compound_send_recv(xid, ses, server, |
| 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; |
| pr_warn_once("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; |
| struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses); |
| 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, server, |
| &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, server, |
| &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, server, |
| &rqst[2], COMPOUND_FID, COMPOUND_FID, false); |
| if (rc) |
| goto querty_exit; |
| |
| smb2_set_related(&rqst[2]); |
| |
| rc = compound_send_recv(xid, tcon->ses, server, |
| 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)); |
|