diff options
Diffstat (limited to 'fs/cifs/smb2pdu.c')
| -rw-r--r-- | fs/cifs/smb2pdu.c | 1889 |
1 files changed, 1690 insertions, 199 deletions
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c index 62b3f17d061..b0b260dbb19 100644 --- a/fs/cifs/smb2pdu.c +++ b/fs/cifs/smb2pdu.c @@ -1,7 +1,7 @@ /* * fs/cifs/smb2pdu.c * - * Copyright (C) International Business Machines Corp., 2009, 2011 + * Copyright (C) International Business Machines Corp., 2009, 2013 * Etersoft, 2012 * Author(s): Steve French (sfrench@us.ibm.com) * Pavel Shilovsky (pshilovsky@samba.org) 2012 @@ -31,7 +31,9 @@ #include <linux/fs.h> #include <linux/kernel.h> #include <linux/vfs.h> +#include <linux/task_io_accounting_ops.h> #include <linux/uaccess.h> +#include <linux/pagemap.h> #include <linux/xattr.h> #include "smb2pdu.h" #include "cifsglob.h" @@ -42,6 +44,8 @@ #include "cifs_debug.h" #include "ntlmssp.h" #include "smb2status.h" +#include "smb2glob.h" +#include "cifspdu.h" /* * The following table defines the expected "StructureSize" of SMB2 requests @@ -104,20 +108,34 @@ smb2_hdr_assemble(struct smb2_hdr *hdr, __le16 smb2_cmd /* command */ , if (!tcon) goto out; + /* BB FIXME when we do write > 64K add +1 for every 64K in req or rsp */ + /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */ + /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */ + if ((tcon->ses) && + (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) + hdr->CreditCharge = cpu_to_le16(1); + /* else CreditCharge MBZ */ + hdr->TreeId = tcon->tid; /* Uid is not converted */ if (tcon->ses) hdr->SessionId = tcon->ses->Suid; - /* BB check following DFS flags BB */ - /* BB do we have to add check for SHI1005_FLAGS_DFS_ROOT too? */ - if (tcon->share_flags & SHI1005_FLAGS_DFS) - hdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; - /* BB how does SMB2 do case sensitive? */ - /* if (tcon->nocase) - hdr->Flags |= SMBFLG_CASELESS; */ - /* if (tcon->ses && tcon->ses->server && - (tcon->ses->server->sec_mode & SECMODE_SIGN_REQUIRED)) - hdr->Flags |= SMB2_FLAGS_SIGNED; */ + + /* + * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have + * to pass the path on the Open SMB prefixed by \\server\share. + * Not sure when we would need to do the augmented path (if ever) and + * setting this flag breaks the SMB2 open operation since it is + * illegal to send an empty path name (without \\server\share prefix) + * when the DFS flag is set in the SMB open header. We could + * consider setting the flag on all operations other than open + * but it is safer to net set it for now. + */ +/* if (tcon->share_flags & SHI1005_FLAGS_DFS) + hdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */ + + if (tcon->ses && tcon->ses->server && tcon->ses->server->sign) + hdr->Flags |= SMB2_FLAGS_SIGNED; out: pdu->StructureSize2 = cpu_to_le16(parmsize); return; @@ -151,8 +169,8 @@ smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon) if ((smb2_command != SMB2_WRITE) && (smb2_command != SMB2_CREATE) && (smb2_command != SMB2_TREE_DISCONNECT)) { - cFYI(1, "can not send cmd %d while umounting", - smb2_command); + cifs_dbg(FYI, "can not send cmd %d while umounting\n", + smb2_command); return -ENODEV; } } @@ -196,7 +214,7 @@ smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon) * back on-line */ if (!tcon->retry) { - cFYI(1, "gave up waiting on reconnect in smb_init"); + cifs_dbg(FYI, "gave up waiting on reconnect in smb_init\n"); return -EHOSTDOWN; } } @@ -223,7 +241,7 @@ smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon) cifs_mark_open_files_invalid(tcon); rc = SMB2_tcon(0, tcon->ses, tcon->treeName, tcon, nls_codepage); mutex_unlock(&tcon->ses->session_mutex); - cFYI(1, "reconnect tcon rc = %d", rc); + cifs_dbg(FYI, "reconnect tcon rc = %d\n", rc); if (rc) goto out; atomic_inc(&tconInfoReconnectCount); @@ -300,24 +318,6 @@ free_rsp_buf(int resp_buftype, void *rsp) cifs_buf_release(rsp); } -#define SMB2_NUM_PROT 1 - -#define SMB2_PROT 0 -#define SMB21_PROT 1 -#define BAD_PROT 0xFFFF - -#define SMB2_PROT_ID 0x0202 -#define SMB21_PROT_ID 0x0210 -#define BAD_PROT_ID 0xFFFF - -static struct { - int index; - __le16 name; -} smb2protocols[] = { - {SMB2_PROT, cpu_to_le16(SMB2_PROT_ID)}, - {SMB21_PROT, cpu_to_le16(SMB21_PROT_ID)}, - {BAD_PROT, cpu_to_le16(BAD_PROT_ID)} -}; /* * @@ -342,52 +342,45 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses) struct kvec iov[1]; int rc = 0; int resp_buftype; - struct TCP_Server_Info *server; - unsigned int sec_flags; - u16 i; - u16 temp = 0; + struct TCP_Server_Info *server = ses->server; int blob_offset, blob_length; char *security_blob; int flags = CIFS_NEG_OP; - cFYI(1, "Negotiate protocol"); + cifs_dbg(FYI, "Negotiate protocol\n"); - if (ses->server) - server = ses->server; - else { - rc = -EIO; - return rc; + if (!server) { + WARN(1, "%s: server is NULL!\n", __func__); + return -EIO; } rc = small_smb2_init(SMB2_NEGOTIATE, NULL, (void **) &req); if (rc) return rc; - /* if any of auth flags (ie not sign or seal) are overriden use them */ - if (ses->overrideSecFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL))) - sec_flags = ses->overrideSecFlg; /* BB FIXME fix sign flags?*/ - else /* if override flags set only sign/seal OR them with global auth */ - sec_flags = global_secflags | ses->overrideSecFlg; - - cFYI(1, "sec_flags 0x%x", sec_flags); - req->hdr.SessionId = 0; - for (i = 0; i < SMB2_NUM_PROT; i++) - req->Dialects[i] = smb2protocols[i].name; + req->Dialects[0] = cpu_to_le16(ses->server->vals->protocol_id); - req->DialectCount = cpu_to_le16(i); - inc_rfc1001_len(req, i * 2); + req->DialectCount = cpu_to_le16(1); /* One vers= at a time for now */ + inc_rfc1001_len(req, 2); /* only one of SMB2 signing flags may be set in SMB2 request */ - if ((sec_flags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) - temp = SMB2_NEGOTIATE_SIGNING_REQUIRED; - else if (sec_flags & CIFSSEC_MAY_SIGN) /* MAY_SIGN is a single flag */ - temp = SMB2_NEGOTIATE_SIGNING_ENABLED; + if (ses->sign) + req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED); + else if (global_secflags & CIFSSEC_MAY_SIGN) + req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED); + else + req->SecurityMode = 0; - req->SecurityMode = cpu_to_le16(temp); + req->Capabilities = cpu_to_le32(ses->server->vals->req_capabilities); - req->Capabilities = cpu_to_le32(SMB2_GLOBAL_CAP_DFS); + /* ClientGUID must be zero for SMB2.02 dialect */ + if (ses->server->vals->protocol_id == SMB20_PROT_ID) + memset(req->ClientGUID, 0, SMB2_CLIENT_GUID_SIZE); + else + memcpy(req->ClientGUID, server->client_guid, + SMB2_CLIENT_GUID_SIZE); iov[0].iov_base = (char *)req; /* 4 for rfc1002 length field */ @@ -403,26 +396,31 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses) if (rc != 0) goto neg_exit; - if (rsp == NULL) { - rc = -EIO; - goto neg_exit; - } - - cFYI(1, "mode 0x%x", rsp->SecurityMode); - - if (rsp->DialectRevision == smb2protocols[SMB21_PROT].name) - cFYI(1, "negotiated smb2.1 dialect"); - else if (rsp->DialectRevision == smb2protocols[SMB2_PROT].name) - cFYI(1, "negotiated smb2 dialect"); + cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode); + + /* BB we may eventually want to match the negotiated vs. requested + dialect, even though we are only requesting one at a time */ + if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) + cifs_dbg(FYI, "negotiated smb2.0 dialect\n"); + else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) + cifs_dbg(FYI, "negotiated smb2.1 dialect\n"); + else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID)) + cifs_dbg(FYI, "negotiated smb3.0 dialect\n"); + else if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID)) + cifs_dbg(FYI, "negotiated smb3.02 dialect\n"); else { - cERROR(1, "Illegal dialect returned by server %d", - le16_to_cpu(rsp->DialectRevision)); + cifs_dbg(VFS, "Illegal dialect returned by server %d\n", + le16_to_cpu(rsp->DialectRevision)); rc = -EIO; goto neg_exit; } server->dialect = le16_to_cpu(rsp->DialectRevision); - server->maxBuf = le32_to_cpu(rsp->MaxTransactSize); + /* SMB2 only has an extended negflavor */ + server->negflavor = CIFS_NEGFLAVOR_EXTENDED; + /* set it to the maximum buffer size value we can send with 1 credit */ + server->maxBuf = min_t(unsigned int, le32_to_cpu(rsp->MaxTransactSize), + SMB2_MAX_BUFFER_SIZE); server->max_read = le32_to_cpu(rsp->MaxReadSize); server->max_write = le32_to_cpu(rsp->MaxWriteSize); /* BB Do we need to validate the SecurityMode? */ @@ -433,13 +431,22 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses) security_blob = smb2_get_data_area_len(&blob_offset, &blob_length, &rsp->hdr); - if (blob_length == 0) { - cERROR(1, "missing security blob on negprot"); - rc = -EIO; - goto neg_exit; - } + /* + * See MS-SMB2 section 2.2.4: if no blob, client picks default which + * for us will be + * ses->sectype = RawNTLMSSP; + * but for time being this is our only auth choice so doesn't matter. + * We just found a server which sets blob length to zero expecting raw. + */ + if (blob_length == 0) + cifs_dbg(FYI, "missing security blob on negprot\n"); + + rc = cifs_enable_signing(server, ses->sign); #ifdef CONFIG_SMB2_ASN1 /* BB REMOVEME when updated asn1.c ready */ - rc = decode_neg_token_init(security_blob, blob_length, + if (rc) + goto neg_exit; + if (blob_length) + rc = decode_neg_token_init(security_blob, blob_length, &server->sec_type); if (rc == 1) rc = 0; @@ -454,6 +461,82 @@ neg_exit: return rc; } +int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon) +{ + int rc = 0; + struct validate_negotiate_info_req vneg_inbuf; + struct validate_negotiate_info_rsp *pneg_rsp; + u32 rsplen; + + cifs_dbg(FYI, "validate negotiate\n"); + + /* + * validation ioctl must be signed, so no point sending this if we + * can not sign it. We could eventually change this to selectively + * sign just this, the first and only signed request on a connection. + * This is good enough for now since a user who wants better security + * would also enable signing on the mount. Having validation of + * negotiate info for signed connections helps reduce attack vectors + */ + if (tcon->ses->server->sign == false) + return 0; /* validation requires signing */ + + vneg_inbuf.Capabilities = + cpu_to_le32(tcon->ses->server->vals->req_capabilities); + memcpy(vneg_inbuf.Guid, tcon->ses->server->client_guid, + SMB2_CLIENT_GUID_SIZE); + + if (tcon->ses->sign) + vneg_inbuf.SecurityMode = + cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED); + else if (global_secflags & CIFSSEC_MAY_SIGN) + vneg_inbuf.SecurityMode = + cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED); + else + vneg_inbuf.SecurityMode = 0; + + vneg_inbuf.DialectCount = cpu_to_le16(1); + vneg_inbuf.Dialects[0] = + cpu_to_le16(tcon->ses->server->vals->protocol_id); + + rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID, + FSCTL_VALIDATE_NEGOTIATE_INFO, true /* is_fsctl */, + (char *)&vneg_inbuf, sizeof(struct validate_negotiate_info_req), + (char **)&pneg_rsp, &rsplen); + + if (rc != 0) { + cifs_dbg(VFS, "validate protocol negotiate failed: %d\n", rc); + return -EIO; + } + + if (rsplen != sizeof(struct validate_negotiate_info_rsp)) { + cifs_dbg(VFS, "invalid size of protocol negotiate response\n"); + return -EIO; + } + + /* check validate negotiate info response matches what we got earlier */ + if (pneg_rsp->Dialect != + cpu_to_le16(tcon->ses->server->vals->protocol_id)) + goto vneg_out; + + if (pneg_rsp->SecurityMode != cpu_to_le16(tcon->ses->server->sec_mode)) + goto vneg_out; + + /* do not validate server guid because not saved at negprot time yet */ + + if ((le32_to_cpu(pneg_rsp->Capabilities) | SMB2_NT_FIND | + SMB2_LARGE_FILES) != tcon->ses->server->capabilities) + goto vneg_out; + + /* validate negotiate successful */ + cifs_dbg(FYI, "validate negotiate info successful\n"); + return 0; + +vneg_out: + cifs_dbg(VFS, "protocol revalidation - security settings mismatch\n"); + return -EIO; +} + int SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses, const struct nls_table *nls_cp) @@ -464,32 +547,37 @@ SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses, int rc = 0; int resp_buftype; __le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */ - struct TCP_Server_Info *server; - unsigned int sec_flags; - u8 temp = 0; + struct TCP_Server_Info *server = ses->server; u16 blob_length = 0; char *security_blob; char *ntlmssp_blob = NULL; bool use_spnego = false; /* else use raw ntlmssp */ - cFYI(1, "Session Setup"); + cifs_dbg(FYI, "Session Setup\n"); - if (ses->server) - server = ses->server; - else { - rc = -EIO; - return rc; + if (!server) { + WARN(1, "%s: server is NULL!\n", __func__); + return -EIO; } /* + * If we are here due to reconnect, free per-smb session key + * in case signing was required. + */ + kfree(ses->auth_key.response); + ses->auth_key.response = NULL; + + /* * If memory allocation is successful, caller of this function * frees it. */ ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL); if (!ses->ntlmssp) return -ENOMEM; + ses->ntlmssp->sesskey_per_smbsess = true; - ses->server->secType = RawNTLMSSP; + /* FIXME: allow for other auth types besides NTLMSSP (e.g. krb5) */ + ses->sectype = RawNTLMSSP; ssetup_ntlmssp_authenticate: if (phase == NtLmChallenge) @@ -499,28 +587,19 @@ ssetup_ntlmssp_authenticate: if (rc) return rc; - /* if any of auth flags (ie not sign or seal) are overriden use them */ - if (ses->overrideSecFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL))) - sec_flags = ses->overrideSecFlg; /* BB FIXME fix sign flags?*/ - else /* if override flags set only sign/seal OR them with global auth */ - sec_flags = global_secflags | ses->overrideSecFlg; - - cFYI(1, "sec_flags 0x%x", sec_flags); - req->hdr.SessionId = 0; /* First session, not a reauthenticate */ req->VcNumber = 0; /* MBZ */ /* to enable echos and oplocks */ req->hdr.CreditRequest = cpu_to_le16(3); /* only one of SMB2 signing flags may be set in SMB2 request */ - if ((sec_flags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) - temp = SMB2_NEGOTIATE_SIGNING_REQUIRED; - else if (ses->server->sec_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) - temp = SMB2_NEGOTIATE_SIGNING_REQUIRED; - else if (sec_flags & CIFSSEC_MAY_SIGN) /* MAY_SIGN is a single flag */ - temp = SMB2_NEGOTIATE_SIGNING_ENABLED; - - req->SecurityMode = temp; + if (server->sign) + req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED; + else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */ + req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED; + else + req->SecurityMode = 0; + req->Capabilities = 0; req->Channel = 0; /* MBZ */ @@ -541,7 +620,7 @@ ssetup_ntlmssp_authenticate: sizeof(struct _NEGOTIATE_MESSAGE), ntlmssp_blob); */ /* BB eventually need to add this */ - cERROR(1, "spnego not supported for SMB2 yet"); + cifs_dbg(VFS, "spnego not supported for SMB2 yet\n"); rc = -EOPNOTSUPP; kfree(ntlmssp_blob); goto ssetup_exit; @@ -555,14 +634,14 @@ ssetup_ntlmssp_authenticate: ntlmssp_blob = kzalloc(sizeof(struct _NEGOTIATE_MESSAGE) + 500, GFP_KERNEL); if (ntlmssp_blob == NULL) { - cERROR(1, "failed to malloc ntlmssp blob"); rc = -ENOMEM; goto ssetup_exit; } rc = build_ntlmssp_auth_blob(ntlmssp_blob, &blob_length, ses, nls_cp); if (rc) { - cFYI(1, "build_ntlmssp_auth_blob failed %d", rc); + cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n", + rc); goto ssetup_exit; /* BB double check error handling */ } if (use_spnego) { @@ -570,7 +649,7 @@ ssetup_ntlmssp_authenticate: &security_blob, blob_length, ntlmssp_blob); */ - cERROR(1, "spnego not supported for SMB2 yet"); + cifs_dbg(VFS, "spnego not supported for SMB2 yet\n"); rc = -EOPNOTSUPP; kfree(ntlmssp_blob); goto ssetup_exit; @@ -578,7 +657,7 @@ ssetup_ntlmssp_authenticate: security_blob = ntlmssp_blob; } } else { - cERROR(1, "illegal ntlmssp phase"); + cifs_dbg(VFS, "illegal ntlmssp phase\n"); rc = -EIO; goto ssetup_exit; } @@ -595,19 +674,21 @@ ssetup_ntlmssp_authenticate: /* BB add code to build os and lm fields */ - rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, CIFS_LOG_ERROR); + rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, + CIFS_LOG_ERROR | CIFS_NEG_OP); kfree(security_blob); rsp = (struct smb2_sess_setup_rsp *)iov[0].iov_base; - if (rsp->hdr.Status == STATUS_MORE_PROCESSING_REQUIRED) { + if (resp_buftype != CIFS_NO_BUFFER && + rsp->hdr.Status == STATUS_MORE_PROCESSING_REQUIRED) { if (phase != NtLmNegotiate) { - cERROR(1, "Unexpected more processing error"); + cifs_dbg(VFS, "Unexpected more processing error\n"); goto ssetup_exit; } if (offsetof(struct smb2_sess_setup_rsp, Buffer) - 4 != - le16_to_cpu(rsp->SecurityBufferOffset)) { - cERROR(1, "Invalid security buffer offset %d", - le16_to_cpu(rsp->SecurityBufferOffset)); + le16_to_cpu(rsp->SecurityBufferOffset)) { + cifs_dbg(VFS, "Invalid security buffer offset %d\n", + le16_to_cpu(rsp->SecurityBufferOffset)); rc = -EIO; goto ssetup_exit; } @@ -631,18 +712,49 @@ ssetup_ntlmssp_authenticate: if (rc != 0) goto ssetup_exit; - if (rsp == NULL) { - rc = -EIO; - goto ssetup_exit; - } - ses->session_flags = le16_to_cpu(rsp->SessionFlags); + if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) + cifs_dbg(VFS, "SMB3 encryption not supported yet\n"); ssetup_exit: free_rsp_buf(resp_buftype, rsp); /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */ if ((phase == NtLmChallenge) && (rc == 0)) goto ssetup_ntlmssp_authenticate; + + if (!rc) { + mutex_lock(&server->srv_mutex); + if (server->sign && server->ops->generate_signingkey) { + rc = server->ops->generate_signingkey(ses); + kfree(ses->auth_key.response); + ses->auth_key.response = NULL; + if (rc) { + cifs_dbg(FYI, + "SMB3 session key generation failed\n"); + mutex_unlock(&server->srv_mutex); + goto keygen_exit; + } + } + if (!server->session_estab) { + server->sequence_number = 0x2; + server->session_estab = true; + } + mutex_unlock(&server->srv_mutex); + + cifs_dbg(FYI, "SMB2/3 session established successfully\n"); + spin_lock(&GlobalMid_Lock); + ses->status = CifsGood; + ses->need_reconnect = false; + spin_unlock(&GlobalMid_Lock); + } + +keygen_exit: + if (!server->sign) { + kfree(ses->auth_key.response); + ses->auth_key.response = NULL; + } + kfree(ses->ntlmssp); + return rc; } @@ -653,25 +765,33 @@ SMB2_logoff(const unsigned int xid, struct cifs_ses *ses) int rc = 0; struct TCP_Server_Info *server; - cFYI(1, "disconnect session %p", ses); + cifs_dbg(FYI, "disconnect session %p\n", ses); if (ses && (ses->server)) server = ses->server; else return -EIO; + /* no need to send SMB logoff if uid already closed due to reconnect */ + if (ses->need_reconnect) + goto smb2_session_already_dead; + rc = small_smb2_init(SMB2_LOGOFF, NULL, (void **) &req); if (rc) return rc; /* since no tcon, smb2_init can not do this, so do here */ req->hdr.SessionId = ses->Suid; + if (server->sign) + req->hdr.Flags |= SMB2_FLAGS_SIGNED; rc = SendReceiveNoRsp(xid, ses, (char *) &req->hdr, 0); /* * No tcon so can't do * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]); */ + +smb2_session_already_dead: return rc; } @@ -682,6 +802,14 @@ static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code) #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */) +/* These are similar values to what Windows uses */ +static inline void init_copy_chunk_defaults(struct cifs_tcon *tcon) +{ + tcon->max_chunks = 256; + tcon->max_bytes_chunk = 1048576; + tcon->max_bytes_copy = 16777216; +} + int SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree, struct cifs_tcon *tcon, const struct nls_table *cp) @@ -695,7 +823,7 @@ SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree, struct TCP_Server_Info *server; __le16 *unc_path = NULL; - cFYI(1, "TCON"); + cifs_dbg(FYI, "TCON\n"); if ((ses->server) && tree) server = ses->server; @@ -753,41 +881,39 @@ SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree, goto tcon_error_exit; } - if (rsp == NULL) { - rc = -EIO; - goto tcon_exit; - } - if (tcon == NULL) { ses->ipc_tid = rsp->hdr.TreeId; goto tcon_exit; } if (rsp->ShareType & SMB2_SHARE_TYPE_DISK) - cFYI(1, "connection to disk share"); + cifs_dbg(FYI, "connection to disk share\n"); else if (rsp->ShareType & SMB2_SHARE_TYPE_PIPE) { tcon->ipc = true; - cFYI(1, "connection to pipe share"); + cifs_dbg(FYI, "connection to pipe share\n"); } else if (rsp->ShareType & SMB2_SHARE_TYPE_PRINT) { tcon->print = true; - cFYI(1, "connection to printer"); + cifs_dbg(FYI, "connection to printer\n"); } else { - cERROR(1, "unknown share type %d", rsp->ShareType); + cifs_dbg(VFS, "unknown share type %d\n", rsp->ShareType); rc = -EOPNOTSUPP; goto tcon_error_exit; } tcon->share_flags = le32_to_cpu(rsp->ShareFlags); + tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */ tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess); tcon->tidStatus = CifsGood; tcon->need_reconnect = false; tcon->tid = rsp->hdr.TreeId; - strncpy(tcon->treeName, tree, MAX_TREE_SIZE); + strlcpy(tcon->treeName, tree, sizeof(tcon->treeName)); if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) && ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0)) - cERROR(1, "DFS capability contradicts DFS flag"); - + cifs_dbg(VFS, "DFS capability contradicts DFS flag\n"); + init_copy_chunk_defaults(tcon); + if (tcon->ses->server->ops->validate_negotiate) + rc = tcon->ses->server->ops->validate_negotiate(xid, tcon); tcon_exit: free_rsp_buf(resp_buftype, rsp); kfree(unc_path); @@ -795,7 +921,7 @@ tcon_exit: tcon_error_exit: if (rsp->hdr.Status == STATUS_BAD_NETWORK_NAME) { - cERROR(1, "BAD_NETWORK_NAME: %s", tree); + cifs_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree); tcon->bad_network_name = true; } goto tcon_exit; @@ -809,7 +935,7 @@ SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon) struct TCP_Server_Info *server; struct cifs_ses *ses = tcon->ses; - cFYI(1, "Tree Disconnect"); + cifs_dbg(FYI, "Tree Disconnect\n"); if (ses && (ses->server)) server = ses->server; @@ -830,22 +956,150 @@ SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon) return rc; } + +static struct create_durable * +create_durable_buf(void) +{ + struct create_durable *buf; + + buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL); + if (!buf) + return NULL; + + buf->ccontext.DataOffset = cpu_to_le16(offsetof + (struct create_durable, Data)); + buf->ccontext.DataLength = cpu_to_le32(16); + buf->ccontext.NameOffset = cpu_to_le16(offsetof + (struct create_durable, Name)); + buf->ccontext.NameLength = cpu_to_le16(4); + /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */ + buf->Name[0] = 'D'; + buf->Name[1] = 'H'; + buf->Name[2] = 'n'; + buf->Name[3] = 'Q'; + return buf; +} + +static struct create_durable * +create_reconnect_durable_buf(struct cifs_fid *fid) +{ + struct create_durable *buf; + + buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL); + if (!buf) + return NULL; + + buf->ccontext.DataOffset = cpu_to_le16(offsetof + (struct create_durable, Data)); + buf->ccontext.DataLength = cpu_to_le32(16); + buf->ccontext.NameOffset = cpu_to_le16(offsetof + (struct create_durable, Name)); + buf->ccontext.NameLength = cpu_to_le16(4); + buf->Data.Fid.PersistentFileId = fid->persistent_fid; + buf->Data.Fid.VolatileFileId = fid->volatile_fid; + /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */ + buf->Name[0] = 'D'; + buf->Name[1] = 'H'; + buf->Name[2] = 'n'; + buf->Name[3] = 'C'; + return buf; +} + +static __u8 +parse_lease_state(struct TCP_Server_Info *server, struct smb2_create_rsp *rsp, + unsigned int *epoch) +{ + char *data_offset; + struct create_context *cc; + unsigned int next = 0; + char *name; + + data_offset = (char *)rsp + 4 + le32_to_cpu(rsp->CreateContextsOffset); + cc = (struct create_context *)data_offset; + do { + cc = (struct create_context *)((char *)cc + next); + name = le16_to_cpu(cc->NameOffset) + (char *)cc; + if (le16_to_cpu(cc->NameLength) != 4 || + strncmp(name, "RqLs", 4)) { + next = le32_to_cpu(cc->Next); + continue; + } + return server->ops->parse_lease_buf(cc, epoch); + } while (next != 0); + + return 0; +} + +static int +add_lease_context(struct TCP_Server_Info *server, struct kvec *iov, + unsigned int *num_iovec, __u8 *oplock) +{ + struct smb2_create_req *req = iov[0].iov_base; + unsigned int num = *num_iovec; + + iov[num].iov_base = server->ops->create_lease_buf(oplock+1, *oplock); + if (iov[num].iov_base == NULL) + return -ENOMEM; + iov[num].iov_len = server->vals->create_lease_size; + req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE; + if (!req->CreateContextsOffset) + req->CreateContextsOffset = cpu_to_le32( + sizeof(struct smb2_create_req) - 4 + + iov[num - 1].iov_len); + le32_add_cpu(&req->CreateContextsLength, + server->vals->create_lease_size); + inc_rfc1001_len(&req->hdr, server->vals->create_lease_size); + *num_iovec = num + 1; + return 0; +} + +static int +add_durable_context(struct kvec *iov, unsigned int *num_iovec, + struct cifs_open_parms *oparms) +{ + struct smb2_create_req *req = iov[0].iov_base; + unsigned int num = *num_iovec; + + if (oparms->reconnect) { + iov[num].iov_base = create_reconnect_durable_buf(oparms->fid); + /* indicate that we don't need to relock the file */ + oparms->reconnect = false; + } else + iov[num].iov_base = create_durable_buf(); + if (iov[num].iov_base == NULL) + return -ENOMEM; + iov[num].iov_len = sizeof(struct create_durable); + if (!req->CreateContextsOffset) + req->CreateContextsOffset = + cpu_to_le32(sizeof(struct smb2_create_req) - 4 + + iov[1].iov_len); + le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable)); + inc_rfc1001_len(&req->hdr, sizeof(struct create_durable)); + *num_iovec = num + 1; + return 0; +} + int -SMB2_open(const unsigned int xid, struct cifs_tcon *tcon, __le16 *path, - u64 *persistent_fid, u64 *volatile_fid, __u32 desired_access, - __u32 create_disposition, __u32 file_attributes, __u32 create_options) +SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path, + __u8 *oplock, struct smb2_file_all_info *buf, + struct smb2_err_rsp **err_buf) { struct smb2_create_req *req; struct smb2_create_rsp *rsp; struct TCP_Server_Info *server; + struct cifs_tcon *tcon = oparms->tcon; struct cifs_ses *ses = tcon->ses; - struct kvec iov[2]; + struct kvec iov[4]; int resp_buftype; int uni_path_len; + __le16 *copy_path = NULL; + int copy_size; int rc = 0; - int num_iovecs = 2; + unsigned int num_iovecs = 2; + __u32 file_attributes = 0; + char *dhc_buf = NULL, *lc_buf = NULL; - cFYI(1, "create/open"); + cifs_dbg(FYI, "create/open\n"); if (ses && (ses->server)) server = ses->server; @@ -856,40 +1110,79 @@ SMB2_open(const unsigned int xid, struct cifs_tcon *tcon, __le16 *path, if (rc) return rc; - if (enable_oplocks) - req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_BATCH; - else - req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_NONE; + if (oparms->create_options & CREATE_OPTION_READONLY) + file_attributes |= ATTR_READONLY; + req->ImpersonationLevel = IL_IMPERSONATION; - req->DesiredAccess = cpu_to_le32(desired_access); + req->DesiredAccess = cpu_to_le32(oparms->desired_access); /* File attributes ignored on open (used in create though) */ req->FileAttributes = cpu_to_le32(file_attributes); req->ShareAccess = FILE_SHARE_ALL_LE; - req->CreateDisposition = cpu_to_le32(create_disposition); - req->CreateOptions = cpu_to_le32(create_options); + req->CreateDisposition = cpu_to_le32(oparms->disposition); + req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK); uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2; - req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req) - - 1 /* pad */ - 4 /* do not count rfc1001 len field */); + /* do not count rfc1001 len field */ + req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req) - 4); iov[0].iov_base = (char *)req; /* 4 for rfc1002 length field */ iov[0].iov_len = get_rfc1002_length(req) + 4; /* MUST set path len (NameLength) to 0 opening root of share */ - if (uni_path_len >= 4) { - req->NameLength = cpu_to_le16(uni_path_len - 2); - /* -1 since last byte is buf[0] which is sent below (path) */ - iov[0].iov_len--; - iov[1].iov_len = uni_path_len; - iov[1].iov_base = path; - /* - * -1 since last byte is buf[0] which was counted in - * smb2_buf_len. - */ - inc_rfc1001_len(req, uni_path_len - 1); - } else { - num_iovecs = 1; - req->NameLength = 0; + req->NameLength = cpu_to_le16(uni_path_len - 2); + /* -1 since last byte is buf[0] which is sent below (path) */ + iov[0].iov_len--; + if (uni_path_len % 8 != 0) { + copy_size = uni_path_len / 8 * 8; + if (copy_size < uni_path_len) + copy_size += 8; + + copy_path = kzalloc(copy_size, GFP_KERNEL); + if (!copy_path) + return -ENOMEM; + memcpy((char *)copy_path, (const char *)path, + uni_path_len); + uni_path_len = copy_size; + path = copy_path; + } + + iov[1].iov_len = uni_path_len; + iov[1].iov_base = path; + /* -1 since last byte is buf[0] which was counted in smb2_buf_len */ + inc_rfc1001_len(req, uni_path_len - 1); + + if (!server->oplocks) + *oplock = SMB2_OPLOCK_LEVEL_NONE; + + if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) || + *oplock == SMB2_OPLOCK_LEVEL_NONE) + req->RequestedOplockLevel = *oplock; + else { + rc = add_lease_context(server, iov, &num_iovecs, oplock); + if (rc) { + cifs_small_buf_release(req); + kfree(copy_path); + return rc; + } + lc_buf = iov[num_iovecs-1].iov_base; + } + + if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) { + /* need to set Next field of lease context if we request it */ + if (server->capabilities & SMB2_GLOBAL_CAP_LEASING) { + struct create_context *ccontext = + (struct create_context *)iov[num_iovecs-1].iov_base; + ccontext->Next = + cpu_to_le32(server->vals->create_lease_size); + } + rc = add_durable_context(iov, &num_iovecs, oparms); + if (rc) { + cifs_small_buf_release(req); + kfree(copy_path); + kfree(lc_buf); + return rc; + } + dhc_buf = iov[num_iovecs-1].iov_base; } rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0); @@ -897,20 +1190,197 @@ SMB2_open(const unsigned int xid, struct cifs_tcon *tcon, __le16 *path, if (rc != 0) { cifs_stats_fail_inc(tcon, SMB2_CREATE_HE); + if (err_buf) + *err_buf = kmemdup(rsp, get_rfc1002_length(rsp) + 4, + GFP_KERNEL); goto creat_exit; } - if (rsp == NULL) { - rc = -EIO; - goto creat_exit; + oparms->fid->persistent_fid = rsp->PersistentFileId; + oparms->fid->volatile_fid = rsp->VolatileFileId; + + if (buf) { + memcpy(buf, &rsp->CreationTime, 32); + buf->AllocationSize = rsp->AllocationSize; + buf->EndOfFile = rsp->EndofFile; + buf->Attributes = rsp->FileAttributes; + buf->NumberOfLinks = cpu_to_le32(1); + buf->DeletePending = 0; } - *persistent_fid = rsp->PersistentFileId; - *volatile_fid = rsp->VolatileFileId; + + if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE) + *oplock = parse_lease_state(server, rsp, &oparms->fid->epoch); + else + *oplock = rsp->OplockLevel; creat_exit: + kfree(copy_path); + kfree(lc_buf); + kfree(dhc_buf); free_rsp_buf(resp_buftype, rsp); return rc; } +/* + * SMB2 IOCTL is used for both IOCTLs and FSCTLs + */ +int +SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, + u64 volatile_fid, u32 opcode, bool is_fsctl, char *in_data, + u32 indatalen, char **out_data, u32 *plen /* returned data len */) +{ + struct smb2_ioctl_req *req; + struct smb2_ioctl_rsp *rsp; + struct TCP_Server_Info *server; + struct cifs_ses *ses = tcon->ses; + struct kvec iov[2]; + int resp_buftype; + int num_iovecs; + int rc = 0; + + cifs_dbg(FYI, "SMB2 IOCTL\n"); + + *out_data = NULL; + /* zero out returned data len, in case of error */ + if (plen) + *plen = 0; + + if (ses && (ses->server)) + server = ses->server; + else + return -EIO; + + rc = small_smb2_init(SMB2_IOCTL, tcon, (void **) &req); + if (rc) + return rc; + + req->CtlCode = cpu_to_le32(opcode); + req->PersistentFileId = persistent_fid; + req->VolatileFileId = volatile_fid; + + if (indatalen) { + req->InputCount = cpu_to_le32(indatalen); + /* do not set InputOffset if no input data */ + req->InputOffset = + cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer) - 4); + iov[1].iov_base = in_data; + iov[1].iov_len = indatalen; + num_iovecs = 2; + } else + num_iovecs = 1; + + req->OutputOffset = 0; + req->OutputCount = 0; /* MBZ */ + + /* + * Could increase MaxOutputResponse, but that would require more + * than one credit. Windows typically sets this smaller, but for some + * ioctls it may be useful to allow server to send more. No point + * limiting what the server can send as long as fits in one credit + */ + req->MaxOutputResponse = cpu_to_le32(0xFF00); /* < 64K uses 1 credit */ + + if (is_fsctl) + req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL); + else + req->Flags = 0; + + iov[0].iov_base = (char *)req; + + /* + * If no input data, the size of ioctl struct in + * protocol spec still includes a 1 byte data buffer, + * but if input data passed to ioctl, we do not + * want to double count this, so we do not send + * the dummy one byte of data in iovec[0] if sending + * input data (in iovec[1]). We also must add 4 bytes + * in first iovec to allow for rfc1002 length field. + */ + + if (indatalen) { + iov[0].iov_len = get_rfc1002_length(req) + 4 - 1; + inc_rfc1001_len(req, indatalen - 1); + } else + iov[0].iov_len = get_rfc1002_length(req) + 4; + + + rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0); + rsp = (struct smb2_ioctl_rsp *)iov[0].iov_base; + + if ((rc != 0) && (rc != -EINVAL)) { + if (tcon) + cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE); + goto ioctl_exit; + } else if (rc == -EINVAL) { + if ((opcode != FSCTL_SRV_COPYCHUNK_WRITE) && + (opcode != FSCTL_SRV_COPYCHUNK)) { + if (tcon) + cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE); + goto ioctl_exit; + } + } + + /* check if caller wants to look at return data or just return rc */ + if ((plen == NULL) || (out_data == NULL)) + goto ioctl_exit; + + *plen = le32_to_cpu(rsp->OutputCount); + + /* We check for obvious errors in the output buffer length and offset */ + if (*plen == 0) + goto ioctl_exit; /* server returned no data */ + else if (*plen > 0xFF00) { + cifs_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen); + *plen = 0; + rc = -EIO; + goto ioctl_exit; + } + + if (get_rfc1002_length(rsp) < le32_to_cpu(rsp->OutputOffset) + *plen) { + cifs_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen, + le32_to_cpu(rsp->OutputOffset)); + *plen = 0; + rc = -EIO; + goto ioctl_exit; + } + + *out_data = kmalloc(*plen, GFP_KERNEL); + if (*out_data == NULL) { + rc = -ENOMEM; + goto ioctl_exit; + } + + memcpy(*out_data, rsp->hdr.ProtocolId + le32_to_cpu(rsp->OutputOffset), + *plen); +ioctl_exit: + free_rsp_buf(resp_buftype, rsp); + return rc; +} + +/* + * Individual callers to ioctl worker function follow + */ + +int +SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon, + u64 persistent_fid, u64 volatile_fid) +{ + int rc; + struct compress_ioctl fsctl_input; + char *ret_data = NULL; + + fsctl_input.CompressionState = + __constant_cpu_to_le16(COMPRESSION_FORMAT_DEFAULT); + + rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid, + FSCTL_SET_COMPRESSION, true /* is_fsctl */, + (char *)&fsctl_input /* data input */, + 2 /* in data len */, &ret_data /* out data */, NULL); + + cifs_dbg(FYI, "set compression rc %d\n", rc); + + return rc; +} + int SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, u64 volatile_fid) @@ -923,7 +1393,7 @@ SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, int resp_buftype; int rc = 0; - cFYI(1, "Close"); + cifs_dbg(FYI, "Close\n"); if (ses && (ses->server)) server = ses->server; @@ -950,11 +1420,6 @@ SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, goto close_exit; } - if (rsp == NULL) { - rc = -EIO; - goto close_exit; - } - /* BB FIXME - decode close response, update inode for caching */ close_exit: @@ -974,20 +1439,20 @@ validate_buf(unsigned int offset, unsigned int buffer_length, if (buffer_length < min_buf_size) { - cERROR(1, "buffer length %d smaller than minimum size %d", - buffer_length, min_buf_size); + cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n", + buffer_length, min_buf_size); return -EINVAL; } /* check if beyond RFC1001 maximum length */ if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) { - cERROR(1, "buffer length %d or smb length %d too large", - buffer_length, smb_len); + cifs_dbg(VFS, "buffer length %d or smb length %d too large\n", + buffer_length, smb_len); return -EINVAL; } if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) { - cERROR(1, "illegal server response, bad offset to data"); + cifs_dbg(VFS, "illegal server response, bad offset to data\n"); return -EINVAL; } @@ -1019,10 +1484,10 @@ validate_and_copy_buf(unsigned int offset, unsigned int buffer_length, return 0; } -int -SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon, - u64 persistent_fid, u64 volatile_fid, - struct smb2_file_all_info *data) +static int +query_info(const unsigned int xid, struct cifs_tcon *tcon, + u64 persistent_fid, u64 volatile_fid, u8 info_class, + size_t output_len, size_t min_len, void *data) { struct smb2_query_info_req *req; struct smb2_query_info_rsp *rsp = NULL; @@ -1032,7 +1497,7 @@ SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon, struct TCP_Server_Info *server; struct cifs_ses *ses = tcon->ses; - cFYI(1, "Query Info"); + cifs_dbg(FYI, "Query Info\n"); if (ses && (ses->server)) server = ses->server; @@ -1044,37 +1509,56 @@ SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon, return rc; req->InfoType = SMB2_O_INFO_FILE; - req->FileInfoClass = FILE_ALL_INFORMATION; + req->FileInfoClass = info_class; req->PersistentFileId = persistent_fid; req->VolatileFileId = volatile_fid; /* 4 for rfc1002 length field and 1 for Buffer */ req->InputBufferOffset = cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4); - req->OutputBufferLength = - cpu_to_le32(sizeof(struct smb2_file_all_info) + MAX_NAME * 2); + req->OutputBufferLength = cpu_to_le32(output_len); iov[0].iov_base = (char *)req; /* 4 for rfc1002 length field */ iov[0].iov_len = get_rfc1002_length(req) + 4; rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0); + rsp = (struct smb2_query_info_rsp *)iov[0].iov_base; + if (rc) { cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); goto qinf_exit; } - rsp = (struct smb2_query_info_rsp *)iov[0].iov_base; - rc = validate_and_copy_buf(le16_to_cpu(rsp->OutputBufferOffset), le32_to_cpu(rsp->OutputBufferLength), - &rsp->hdr, sizeof(struct smb2_file_all_info), - (char *)data); + &rsp->hdr, min_len, data); qinf_exit: free_rsp_buf(resp_buftype, rsp); return rc; } +int +SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon, + u64 persistent_fid, u64 volatile_fid, + struct smb2_file_all_info *data) +{ + return query_info(xid, tcon, persistent_fid, volatile_fid, + FILE_ALL_INFORMATION, + sizeof(struct smb2_file_all_info) + MAX_NAME * 2, + sizeof(struct smb2_file_all_info), data); +} + +int +SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon, + u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid) +{ + return query_info(xid, tcon, persistent_fid, volatile_fid, + FILE_INTERNAL_INFORMATION, + sizeof(struct smb2_file_internal_info), + sizeof(struct smb2_file_internal_info), uniqueid); +} + /* * This is a no-op for now. We're not really interested in the reply, but * rather in the fact that the server sent one and that server->lstrp @@ -1102,8 +1586,10 @@ SMB2_echo(struct TCP_Server_Info *server) struct smb2_echo_req *req; int rc = 0; struct kvec iov; + struct smb_rqst rqst = { .rq_iov = &iov, + .rq_nvec = 1 }; - cFYI(1, "In echo request"); + cifs_dbg(FYI, "In echo request\n"); rc = small_smb2_init(SMB2_ECHO, NULL, (void **)&req); if (rc) @@ -1115,11 +1601,1016 @@ SMB2_echo(struct TCP_Server_Info *server) /* 4 for rfc1002 length field */ iov.iov_len = get_rfc1002_length(req) + 4; - rc = cifs_call_async(server, &iov, 1, NULL, smb2_echo_callback, server, + rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, server, CIFS_ECHO_OP); if (rc) - cFYI(1, "Echo request failed: %d", rc); + cifs_dbg(FYI, "Echo request failed: %d\n", rc); cifs_small_buf_release(req); return rc; } + +int +SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, + u64 volatile_fid) +{ + struct smb2_flush_req *req; + struct TCP_Server_Info *server; + struct cifs_ses *ses = tcon->ses; + struct kvec iov[1]; + int resp_buftype; + int rc = 0; + + cifs_dbg(FYI, "Flush\n"); + + if (ses && (ses->server)) + server = ses->server; + else + return -EIO; + + rc = small_smb2_init(SMB2_FLUSH, tcon, (void **) &req); + if (rc) + return rc; + + req->PersistentFileId = persistent_fid; + req->VolatileFileId = volatile_fid; + + iov[0].iov_base = (char *)req; + /* 4 for rfc1002 length field */ + iov[0].iov_len = get_rfc1002_length(req) + 4; + + rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0); + + if ((rc != 0) && tcon) + cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE); + + free_rsp_buf(resp_buftype, iov[0].iov_base); + return rc; +} + +/* + * To form a chain of read requests, any read requests after the first should + * have the end_of_chain boolean set to true. + */ +static int +smb2_new_read_req(struct kvec *iov, struct cifs_io_parms *io_parms, + unsigned int remaining_bytes, int request_type) +{ + int rc = -EACCES; + struct smb2_read_req *req = NULL; + + rc = small_smb2_init(SMB2_READ, io_parms->tcon, (void **) &req); + if (rc) + return rc; + if (io_parms->tcon->ses->server == NULL) + return -ECONNABORTED; + + req->hdr.ProcessId = cpu_to_le32(io_parms->pid); + + req->PersistentFileId = io_parms->persistent_fid; + req->VolatileFileId = io_parms->volatile_fid; + req->ReadChannelInfoOffset = 0; /* reserved */ + req->ReadChannelInfoLength = 0; /* reserved */ + req->Channel = 0; /* reserved */ + req->MinimumCount = 0; + req->Length = cpu_to_le32(io_parms->length); + req->Offset = cpu_to_le64(io_parms->offset); + + if (request_type & CHAINED_REQUEST) { + if (!(request_type & END_OF_CHAIN)) { + /* 4 for rfc1002 length field */ + req->hdr.NextCommand = + cpu_to_le32(get_rfc1002_length(req) + 4); + } else /* END_OF_CHAIN */ + req->hdr.NextCommand = 0; + if (request_type & RELATED_REQUEST) { + req->hdr.Flags |= SMB2_FLAGS_RELATED_OPERATIONS; + /* + * Related requests use info from previous read request + * in chain. + */ + req->hdr.SessionId = 0xFFFFFFFF; + req->hdr.TreeId = 0xFFFFFFFF; + req->PersistentFileId = 0xFFFFFFFF; + req->VolatileFileId = 0xFFFFFFFF; + } + } + if (remaining_bytes > io_parms->length) + req->RemainingBytes = cpu_to_le32(remaining_bytes); + else + req->RemainingBytes = 0; + + iov[0].iov_base = (char *)req; + /* 4 for rfc1002 length field */ + iov[0].iov_len = get_rfc1002_length(req) + 4; + return rc; +} + +static void +smb2_readv_callback(struct mid_q_entry *mid) +{ + struct cifs_readdata *rdata = mid->callback_data; + struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink); + struct TCP_Server_Info *server = tcon->ses->server; + struct smb2_hdr *buf = (struct smb2_hdr *)rdata->iov.iov_base; + unsigned int credits_received = 1; + struct smb_rqst rqst = { .rq_iov = &rdata->iov, + .rq_nvec = 1, + .rq_pages = rdata->pages, + .rq_npages = rdata->nr_pages, + .rq_pagesz = rdata->pagesz, + .rq_tailsz = rdata->tailsz }; + + cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n", + __func__, mid->mid, mid->mid_state, rdata->result, + rdata->bytes); + + switch (mid->mid_state) { + case MID_RESPONSE_RECEIVED: + credits_received = le16_to_cpu(buf->CreditRequest); + /* result already set, check signature */ + if (server->sign) { + int rc; + + rc = smb2_verify_signature(&rqst, server); + if (rc) + cifs_dbg(VFS, "SMB signature verification returned error = %d\n", + rc); + } + /* FIXME: should this be counted toward the initiating task? */ + task_io_account_read(rdata->bytes); + cifs_stats_bytes_read(tcon, rdata->bytes); + break; + case MID_REQUEST_SUBMITTED: + case MID_RETRY_NEEDED: + rdata->result = -EAGAIN; + break; + default: + if (rdata->result != -ENODATA) + rdata->result = -EIO; + } + + if (rdata->result) + cifs_stats_fail_inc(tcon, SMB2_READ_HE); + + queue_work(cifsiod_wq, &rdata->work); + DeleteMidQEntry(mid); + add_credits(server, credits_received, 0); +} + +/* smb2_async_readv - send an async write, and set up mid to handle result */ +int +smb2_async_readv(struct cifs_readdata *rdata) +{ + int rc; + struct smb2_hdr *buf; + struct cifs_io_parms io_parms; + struct smb_rqst rqst = { .rq_iov = &rdata->iov, + .rq_nvec = 1 }; + + cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n", + __func__, rdata->offset, rdata->bytes); + + io_parms.tcon = tlink_tcon(rdata->cfile->tlink); + io_parms.offset = rdata->offset; + io_parms.length = rdata->bytes; + io_parms.persistent_fid = rdata->cfile->fid.persistent_fid; + io_parms.volatile_fid = rdata->cfile->fid.volatile_fid; + io_parms.pid = rdata->pid; + rc = smb2_new_read_req(&rdata->iov, &io_parms, 0, 0); + if (rc) + return rc; + + buf = (struct smb2_hdr *)rdata->iov.iov_base; + /* 4 for rfc1002 length field */ + rdata->iov.iov_len = get_rfc1002_length(rdata->iov.iov_base) + 4; + + kref_get(&rdata->refcount); + rc = cifs_call_async(io_parms.tcon->ses->server, &rqst, + cifs_readv_receive, smb2_readv_callback, + rdata, 0); + if (rc) { + kref_put(&rdata->refcount, cifs_readdata_release); + cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE); + } + + cifs_small_buf_release(buf); + return rc; +} + +int +SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms, + unsigned int *nbytes, char **buf, int *buf_type) +{ + int resp_buftype, rc = -EACCES; + struct smb2_read_rsp *rsp = NULL; + struct kvec iov[1]; + + *nbytes = 0; + rc = smb2_new_read_req(iov, io_parms, 0, 0); + if (rc) + return rc; + + rc = SendReceive2(xid, io_parms->tcon->ses, iov, 1, + &resp_buftype, CIFS_LOG_ERROR); + + rsp = (struct smb2_read_rsp *)iov[0].iov_base; + + if (rsp->hdr.Status == STATUS_END_OF_FILE) { + free_rsp_buf(resp_buftype, iov[0].iov_base); + return 0; + } + + if (rc) { + cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE); + cifs_dbg(VFS, "Send error in read = %d\n", rc); + } else { + *nbytes = le32_to_cpu(rsp->DataLength); + if ((*nbytes > CIFS_MAX_MSGSIZE) || + (*nbytes > io_parms->length)) { + cifs_dbg(FYI, "bad length %d for count %d\n", + *nbytes, io_parms->length); + rc = -EIO; + *nbytes = 0; + } + } + + if (*buf) { + memcpy(*buf, (char *)rsp->hdr.ProtocolId + rsp->DataOffset, + *nbytes); + free_rsp_buf(resp_buftype, iov[0].iov_base); + } else if (resp_buftype != CIFS_NO_BUFFER) { + *buf = iov[0].iov_base; + if (resp_buftype == CIFS_SMALL_BUFFER) + *buf_type = CIFS_SMALL_BUFFER; + else if (resp_buftype == CIFS_LARGE_BUFFER) + *buf_type = CIFS_LARGE_BUFFER; + } + return rc; +} + +/* + * Check the mid_state and signature on received buffer (if any), and queue the + * workqueue completion task. + */ +static void +smb2_writev_callback(struct mid_q_entry *mid) +{ + struct cifs_writedata *wdata = mid->callback_data; + struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink); + unsigned int written; + struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf; + unsigned int credits_received = 1; + + switch (mid->mid_state) { + case MID_RESPONSE_RECEIVED: + credits_received = le16_to_cpu(rsp->hdr.CreditRequest); + wdata->result = smb2_check_receive(mid, tcon->ses->server, 0); + if (wdata->result != 0) + break; + + written = le32_to_cpu(rsp->DataLength); + /* + * Mask off high 16 bits when bytes written as returned + * by the server is greater than bytes requested by the + * client. OS/2 servers are known to set incorrect + * CountHigh values. + */ + if (written > wdata->bytes) + written &= 0xFFFF; + + if (written < wdata->bytes) + wdata->result = -ENOSPC; + else + wdata->bytes = written; + break; + case MID_REQUEST_SUBMITTED: + case MID_RETRY_NEEDED: + wdata->result = -EAGAIN; + break; + default: + wdata->result = -EIO; + break; + } + + if (wdata->result) + cifs_stats_fail_inc(tcon, SMB2_WRITE_HE); + + queue_work(cifsiod_wq, &wdata->work); + DeleteMidQEntry(mid); + add_credits(tcon->ses->server, credits_received, 0); +} + +/* smb2_async_writev - send an async write, and set up mid to handle result */ +int +smb2_async_writev(struct cifs_writedata *wdata, + void (*release)(struct kref *kref)) +{ + int rc = -EACCES; + struct smb2_write_req *req = NULL; + struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink); + struct kvec iov; + struct smb_rqst rqst; + + rc = small_smb2_init(SMB2_WRITE, tcon, (void **) &req); + if (rc) + goto async_writev_out; + + req->hdr.ProcessId = cpu_to_le32(wdata->cfile->pid); + + req->PersistentFileId = wdata->cfile->fid.persistent_fid; + req->VolatileFileId = wdata->cfile->fid.volatile_fid; + req->WriteChannelInfoOffset = 0; + req->WriteChannelInfoLength = 0; + req->Channel = 0; + req->Offset = cpu_to_le64(wdata->offset); + /* 4 for rfc1002 length field */ + req->DataOffset = cpu_to_le16( + offsetof(struct smb2_write_req, Buffer) - 4); + req->RemainingBytes = 0; + + /* 4 for rfc1002 length field and 1 for Buffer */ + iov.iov_len = get_rfc1002_length(req) + 4 - 1; + iov.iov_base = req; + + rqst.rq_iov = &iov; + rqst.rq_nvec = 1; + rqst.rq_pages = wdata->pages; + rqst.rq_npages = wdata->nr_pages; + rqst.rq_pagesz = wdata->pagesz; + rqst.rq_tailsz = wdata->tailsz; + + cifs_dbg(FYI, "async write at %llu %u bytes\n", + wdata->offset, wdata->bytes); + + req->Length = cpu_to_le32(wdata->bytes); + + inc_rfc1001_len(&req->hdr, wdata->bytes - 1 /* Buffer */); + + kref_get(&wdata->refcount); + rc = cifs_call_async(tcon->ses->server, &rqst, NULL, + smb2_writev_callback, wdata, 0); + + if (rc) { + kref_put(&wdata->refcount, release); + cifs_stats_fail_inc(tcon, SMB2_WRITE_HE); + } + +async_writev_out: + cifs_small_buf_release(req); + return rc; +} + +/* + * SMB2_write function gets iov pointer to kvec array with n_vec as a length. + * The length field from io_parms must be at least 1 and indicates a number of + * elements with data to write that begins with position 1 in iov array. All + * data length is specified by count. + */ +int +SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms, + unsigned int *nbytes, struct kvec *iov, int n_vec) +{ + int rc = 0; + struct smb2_write_req *req = NULL; + struct smb2_write_rsp *rsp = NULL; + int resp_buftype; + *nbytes = 0; + + if (n_vec < 1) + return rc; + + rc = small_smb2_init(SMB2_WRITE, io_parms->tcon, (void **) &req); + if (rc) + return rc; + + if (io_parms->tcon->ses->server == NULL) + return -ECONNABORTED; + + req->hdr.ProcessId = cpu_to_le32(io_parms->pid); + + req->PersistentFileId = io_parms->persistent_fid; + req->VolatileFileId = io_parms->volatile_fid; + req->WriteChannelInfoOffset = 0; + req->WriteChannelInfoLength = 0; + req->Channel = 0; + req->Length = cpu_to_le32(io_parms->length); + req->Offset = cpu_to_le64(io_parms->offset); + /* 4 for rfc1002 length field */ + req->DataOffset = cpu_to_le16( + offsetof(struct smb2_write_req, Buffer) - 4); + req->RemainingBytes = 0; + + iov[0].iov_base = (char *)req; + /* 4 for rfc1002 length field and 1 for Buffer */ + iov[0].iov_len = get_rfc1002_length(req) + 4 - 1; + + /* length of entire message including data to be written */ + inc_rfc1001_len(req, io_parms->length - 1 /* Buffer */); + + rc = SendReceive2(xid, io_parms->tcon->ses, iov, n_vec + 1, + &resp_buftype, 0); + rsp = (struct smb2_write_rsp *)iov[0].iov_base; + + if (rc) { + cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE); + cifs_dbg(VFS, "Send error in write = %d\n", rc); + } else + *nbytes = le32_to_cpu(rsp->DataLength); + + free_rsp_buf(resp_buftype, rsp); + return rc; +} + +static unsigned int +num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size) +{ + int len; + unsigned int entrycount = 0; + unsigned int next_offset = 0; + FILE_DIRECTORY_INFO *entryptr; + + if (bufstart == NULL) + return 0; + + entryptr = (FILE_DIRECTORY_INFO *)bufstart; + + while (1) { + entryptr = (FILE_DIRECTORY_INFO *) + ((char *)entryptr + next_offset); + + if ((char *)entryptr + size > end_of_buf) { + cifs_dbg(VFS, "malformed search entry would overflow\n"); + break; + } + + len = le32_to_cpu(entryptr->FileNameLength); + if ((char *)entryptr + len + size > end_of_buf) { + cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n", + end_of_buf); + break; + } + + *lastentry = (char *)entryptr; + entrycount++; + + next_offset = le32_to_cpu(entryptr->NextEntryOffset); + if (!next_offset) + break; + } + + return entrycount; +} + +/* + * Readdir/FindFirst + */ +int +SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon, + u64 persistent_fid, u64 volatile_fid, int index, + struct cifs_search_info *srch_inf) +{ + struct smb2_query_directory_req *req; + struct smb2_query_directory_rsp *rsp = NULL; + struct kvec iov[2]; + int rc = 0; + int len; + int resp_buftype; + unsigned char *bufptr; + struct TCP_Server_Info *server; + struct cifs_ses *ses = tcon->ses; + __le16 asteriks = cpu_to_le16('*'); + char *end_of_smb; + unsigned int output_size = CIFSMaxBufSize; + size_t info_buf_size; + + if (ses && (ses->server)) + server = ses->server; + else + return -EIO; + + rc = small_smb2_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req); + if (rc) + return rc; + + switch (srch_inf->info_level) { + case SMB_FIND_FILE_DIRECTORY_INFO: + req->FileInformationClass = FILE_DIRECTORY_INFORMATION; + info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1; + break; + case SMB_FIND_FILE_ID_FULL_DIR_INFO: + req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION; + info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1; + break; + default: + cifs_dbg(VFS, "info level %u isn't supported\n", + srch_inf->info_level); + rc = -EINVAL; + goto qdir_exit; + } + + req->FileIndex = cpu_to_le32(index); + req->PersistentFileId = persistent_fid; + req->VolatileFileId = volatile_fid; + + len = 0x2; + bufptr = req->Buffer; + memcpy(bufptr, &asteriks, len); + + req->FileNameOffset = + cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1 - 4); + req->FileNameLength = cpu_to_le16(len); + /* + * BB could be 30 bytes or so longer if we used SMB2 specific + * buffer lengths, but this is safe and close enough. + */ + output_size = min_t(unsigned int, output_size, server->maxBuf); + output_size = min_t(unsigned int, output_size, 2 << 15); + req->OutputBufferLength = cpu_to_le32(output_size); + + iov[0].iov_base = (char *)req; + /* 4 for RFC1001 length and 1 for Buffer */ + iov[0].iov_len = get_rfc1002_length(req) + 4 - 1; + + iov[1].iov_base = (char *)(req->Buffer); + iov[1].iov_len = len; + + inc_rfc1001_len(req, len - 1 /* Buffer */); + + rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0); + rsp = (struct smb2_query_directory_rsp *)iov[0].iov_base; + + if (rc) { + cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE); + goto qdir_exit; + } + + rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset), + le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr, + info_buf_size); + if (rc) + goto qdir_exit; + + srch_inf->unicode = true; + + if (srch_inf->ntwrk_buf_start) { + if (srch_inf->smallBuf) + cifs_small_buf_release(srch_inf->ntwrk_buf_start); + else + cifs_buf_release(srch_inf->ntwrk_buf_start); + } + srch_inf->ntwrk_buf_start = (char *)rsp; + srch_inf->srch_entries_start = srch_inf->last_entry = 4 /* rfclen */ + + (char *)&rsp->hdr + le16_to_cpu(rsp->OutputBufferOffset); + /* 4 for rfc1002 length field */ + end_of_smb = get_rfc1002_length(rsp) + 4 + (char *)&rsp->hdr; + srch_inf->entries_in_buffer = + num_entries(srch_inf->srch_entries_start, end_of_smb, + &srch_inf->last_entry, info_buf_size); + srch_inf->index_of_last_entry += srch_inf->entries_in_buffer; + cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n", + srch_inf->entries_in_buffer, srch_inf->index_of_last_entry, + srch_inf->srch_entries_start, srch_inf->last_entry); + if (resp_buftype == CIFS_LARGE_BUFFER) + srch_inf->smallBuf = false; + else if (resp_buftype == CIFS_SMALL_BUFFER) + srch_inf->smallBuf = true; + else + cifs_dbg(VFS, "illegal search buffer type\n"); + + if (rsp->hdr.Status == STATUS_NO_MORE_FILES) + srch_inf->endOfSearch = 1; + else + srch_inf->endOfSearch = 0; + + return rc; + +qdir_exit: + free_rsp_buf(resp_buftype, rsp); + return rc; +} + +static int +send_set_info(const unsigned int xid, struct cifs_tcon *tcon, + u64 persistent_fid, u64 volatile_fid, u32 pid, int info_class, + unsigned int num, void **data, unsigned int *size) +{ + struct smb2_set_info_req *req; + struct smb2_set_info_rsp *rsp = NULL; + struct kvec *iov; + int rc = 0; + int resp_buftype; + unsigned int i; + struct TCP_Server_Info *server; + struct cifs_ses *ses = tcon->ses; + + if (ses && (ses->server)) + server = ses->server; + else + return -EIO; + + if (!num) + return -EINVAL; + + iov = kmalloc(sizeof(struct kvec) * num, GFP_KERNEL); + if (!iov) + return -ENOMEM; + + rc = small_smb2_init(SMB2_SET_INFO, tcon, (void **) &req); + if (rc) { + kfree(iov); + return rc; + } + + req->hdr.ProcessId = cpu_to_le32(pid); + + req->InfoType = SMB2_O_INFO_FILE; + req->FileInfoClass = info_class; + req->PersistentFileId = persistent_fid; + req->VolatileFileId = volatile_fid; + + /* 4 for RFC1001 length and 1 for Buffer */ + req->BufferOffset = + cpu_to_le16(sizeof(struct smb2_set_info_req) - 1 - 4); + req->BufferLength = cpu_to_le32(*size); + + inc_rfc1001_len(req, *size - 1 /* Buffer */); + + memcpy(req->Buffer, *data, *size); + + iov[0].iov_base = (char *)req; + /* 4 for RFC1001 length */ + iov[0].iov_len = get_rfc1002_length(req) + 4; + + for (i = 1; i < num; i++) { + inc_rfc1001_len(req, size[i]); + le32_add_cpu(&req->BufferLength, size[i]); + iov[i].iov_base = (char *)data[i]; + iov[i].iov_len = size[i]; + } + + rc = SendReceive2(xid, ses, iov, num, &resp_buftype, 0); + rsp = (struct smb2_set_info_rsp *)iov[0].iov_base; + + if (rc != 0) + cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE); + + free_rsp_buf(resp_buftype, rsp); + kfree(iov); + return rc; +} + +int +SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon, + u64 persistent_fid, u64 volatile_fid, __le16 *target_file) +{ + struct smb2_file_rename_info info; + void **data; + unsigned int size[2]; + int rc; + int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX)); + + data = kmalloc(sizeof(void *) * 2, GFP_KERNEL); + if (!data) + return -ENOMEM; + + info.ReplaceIfExists = 1; /* 1 = replace existing target with new */ + /* 0 = fail if target already exists */ + info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */ + info.FileNameLength = cpu_to_le32(len); + + data[0] = &info; + size[0] = sizeof(struct smb2_file_rename_info); + + data[1] = target_file; + size[1] = len + 2 /* null */; + + rc = send_set_info(xid, tcon, persistent_fid, volatile_fid, + current->tgid, FILE_RENAME_INFORMATION, 2, data, + size); + kfree(data); + return rc; +} + +int +SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon, + u64 persistent_fid, u64 volatile_fid, __le16 *target_file) +{ + struct smb2_file_link_info info; + void **data; + unsigned int size[2]; + int rc; + int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX)); + + data = kmalloc(sizeof(void *) * 2, GFP_KERNEL); + if (!data) + return -ENOMEM; + + info.ReplaceIfExists = 0; /* 1 = replace existing link with new */ + /* 0 = fail if link already exists */ + info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */ + info.FileNameLength = cpu_to_le32(len); + + data[0] = &info; + size[0] = sizeof(struct smb2_file_link_info); + + data[1] = target_file; + size[1] = len + 2 /* null */; + + rc = send_set_info(xid, tcon, persistent_fid, volatile_fid, + current->tgid, FILE_LINK_INFORMATION, 2, data, size); + kfree(data); + return rc; +} + +int +SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, + u64 volatile_fid, u32 pid, __le64 *eof) +{ + struct smb2_file_eof_info info; + void *data; + unsigned int size; + + info.EndOfFile = *eof; + + data = &info; + size = sizeof(struct smb2_file_eof_info); + + return send_set_info(xid, tcon, persistent_fid, volatile_fid, pid, + FILE_END_OF_FILE_INFORMATION, 1, &data, &size); +} + +int +SMB2_set_info(const unsigned int xid, struct cifs_tcon *tcon, + u64 persistent_fid, u64 volatile_fid, FILE_BASIC_INFO *buf) +{ + unsigned int size; + size = sizeof(FILE_BASIC_INFO); + return send_set_info(xid, tcon, persistent_fid, volatile_fid, + current->tgid, FILE_BASIC_INFORMATION, 1, + (void **)&buf, &size); +} + +int +SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon, + const u64 persistent_fid, const u64 volatile_fid, + __u8 oplock_level) +{ + int rc; + struct smb2_oplock_break *req = NULL; + + cifs_dbg(FYI, "SMB2_oplock_break\n"); + rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req); + + if (rc) + return rc; + + req->VolatileFid = volatile_fid; + req->PersistentFid = persistent_fid; + req->OplockLevel = oplock_level; + req->hdr.CreditRequest = cpu_to_le16(1); + + rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP); + /* SMB2 buffer freed by function above */ + + if (rc) { + cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE); + cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc); + } + + return rc; +} + +static void +copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf, + struct kstatfs *kst) +{ + kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) * + le32_to_cpu(pfs_inf->SectorsPerAllocationUnit); + kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits); + kst->f_bfree = le64_to_cpu(pfs_inf->ActualAvailableAllocationUnits); + kst->f_bavail = le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits); + return; +} + +static int +build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level, + int outbuf_len, u64 persistent_fid, u64 volatile_fid) +{ + int rc; + struct smb2_query_info_req *req; + + cifs_dbg(FYI, "Query FSInfo level %d\n", level); + + if ((tcon->ses == NULL) || (tcon->ses->server == NULL)) + return -EIO; + + rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req); + if (rc) + return rc; + + req->InfoType = SMB2_O_INFO_FILESYSTEM; + req->FileInfoClass = level; + req->PersistentFileId = persistent_fid; + req->VolatileFileId = volatile_fid; + /* 4 for rfc1002 length field and 1 for pad */ + req->InputBufferOffset = + cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4); + req->OutputBufferLength = cpu_to_le32( + outbuf_len + sizeof(struct smb2_query_info_rsp) - 1 - 4); + + iov->iov_base = (char *)req; + /* 4 for rfc1002 length field */ + iov->iov_len = get_rfc1002_length(req) + 4; + return 0; +} + +int +SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon, + u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata) +{ + struct smb2_query_info_rsp *rsp = NULL; + struct kvec iov; + int rc = 0; + int resp_buftype; + struct cifs_ses *ses = tcon->ses; + struct smb2_fs_full_size_info *info = NULL; + + rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION, + sizeof(struct smb2_fs_full_size_info), + persistent_fid, volatile_fid); + if (rc) + return rc; + + rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0); + if (rc) { + cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); + goto qfsinf_exit; + } + rsp = (struct smb2_query_info_rsp *)iov.iov_base; + + info = (struct smb2_fs_full_size_info *)(4 /* RFC1001 len */ + + le16_to_cpu(rsp->OutputBufferOffset) + (char *)&rsp->hdr); + rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset), + le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr, + sizeof(struct smb2_fs_full_size_info)); + if (!rc) + copy_fs_info_to_kstatfs(info, fsdata); + +qfsinf_exit: + free_rsp_buf(resp_buftype, iov.iov_base); + return rc; +} + +int +SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon, + u64 persistent_fid, u64 volatile_fid, int level) +{ + struct smb2_query_info_rsp *rsp = NULL; + struct kvec iov; + int rc = 0; + int resp_buftype, max_len, min_len; + struct cifs_ses *ses = tcon->ses; + unsigned int rsp_len, offset; + + if (level == FS_DEVICE_INFORMATION) { + max_len = sizeof(FILE_SYSTEM_DEVICE_INFO); + min_len = sizeof(FILE_SYSTEM_DEVICE_INFO); + } else if (level == FS_ATTRIBUTE_INFORMATION) { + max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO); + min_len = MIN_FS_ATTR_INFO_SIZE; + } else if (level == FS_SECTOR_SIZE_INFORMATION) { + max_len = sizeof(struct smb3_fs_ss_info); + min_len = sizeof(struct smb3_fs_ss_info); + } else { + cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level); + return -EINVAL; + } + + rc = build_qfs_info_req(&iov, tcon, level, max_len, + persistent_fid, volatile_fid); + if (rc) + return rc; + + rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0); + if (rc) { + cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); + goto qfsattr_exit; + } + rsp = (struct smb2_query_info_rsp *)iov.iov_base; + + rsp_len = le32_to_cpu(rsp->OutputBufferLength); + offset = le16_to_cpu(rsp->OutputBufferOffset); + rc = validate_buf(offset, rsp_len, &rsp->hdr, min_len); + if (rc) + goto qfsattr_exit; + + if (level == FS_ATTRIBUTE_INFORMATION) + memcpy(&tcon->fsAttrInfo, 4 /* RFC1001 len */ + offset + + (char *)&rsp->hdr, min_t(unsigned int, + rsp_len, max_len)); + else if (level == FS_DEVICE_INFORMATION) + memcpy(&tcon->fsDevInfo, 4 /* RFC1001 len */ + offset + + (char *)&rsp->hdr, sizeof(FILE_SYSTEM_DEVICE_INFO)); + else if (level == FS_SECTOR_SIZE_INFORMATION) { + struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *) + (4 /* RFC1001 len */ + offset + (char *)&rsp->hdr); + tcon->ss_flags = le32_to_cpu(ss_info->Flags); + tcon->perf_sector_size = + le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf); + } + +qfsattr_exit: + free_rsp_buf(resp_buftype, iov.iov_base); + return rc; +} + +int +smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon, + const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid, + const __u32 num_lock, struct smb2_lock_element *buf) +{ + int rc = 0; + struct smb2_lock_req *req = NULL; + struct kvec iov[2]; + int resp_buf_type; + unsigned int count; + + cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock); + + rc = small_smb2_init(SMB2_LOCK, tcon, (void **) &req); + if (rc) + return rc; + + req->hdr.ProcessId = cpu_to_le32(pid); + req->LockCount = cpu_to_le16(num_lock); + + req->PersistentFileId = persist_fid; + req->VolatileFileId = volatile_fid; + + count = num_lock * sizeof(struct smb2_lock_element); + inc_rfc1001_len(req, count - sizeof(struct smb2_lock_element)); + + iov[0].iov_base = (char *)req; + /* 4 for rfc1002 length field and count for all locks */ + iov[0].iov_len = get_rfc1002_length(req) + 4 - count; + iov[1].iov_base = (char *)buf; + iov[1].iov_len = count; + + cifs_stats_inc(&tcon->stats.cifs_stats.num_locks); + rc = SendReceive2(xid, tcon->ses, iov, 2, &resp_buf_type, CIFS_NO_RESP); + if (rc) { + cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc); + cifs_stats_fail_inc(tcon, SMB2_LOCK_HE); + } + + return rc; +} + +int +SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon, + const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid, + const __u64 length, const __u64 offset, const __u32 lock_flags, + const bool wait) +{ + struct smb2_lock_element lock; + + lock.Offset = cpu_to_le64(offset); + lock.Length = cpu_to_le64(length); + lock.Flags = cpu_to_le32(lock_flags); + if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK) + lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY); + + return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock); +} + +int +SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon, + __u8 *lease_key, const __le32 lease_state) +{ + int rc; + struct smb2_lease_ack *req = NULL; + + cifs_dbg(FYI, "SMB2_lease_break\n"); + rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req); + + if (rc) + return rc; + + req->hdr.CreditRequest = cpu_to_le16(1); + req->StructureSize = cpu_to_le16(36); + inc_rfc1001_len(req, 12); + + memcpy(req->LeaseKey, lease_key, 16); + req->LeaseState = lease_state; + + rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP); + /* SMB2 buffer freed by function above */ + + if (rc) { + cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE); + cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc); + } + + return rc; +} |