From f291095f340db986271e951e3891bb95624a93ea Mon Sep 17 00:00:00 2001 From: Noel Power Date: Wed, 27 May 2015 09:22:10 +0100 Subject: client MUST ignore EncryptionKeyLength if CAP_EXTENDED_SECURITY is set [MS-SMB] 2.2.4.5.2.1 states: "ChallengeLength (1 byte): When the CAP_EXTENDED_SECURITY bit is set, the server MUST set this value to zero and clients MUST ignore this value." Signed-off-by: Noel Power Signed-off-by: Steve French --- fs/cifs/cifssmb.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) (limited to 'fs') diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c index f26ffbfc64d8..672ef35c9f73 100644 --- a/fs/cifs/cifssmb.c +++ b/fs/cifs/cifssmb.c @@ -625,9 +625,8 @@ CIFSSMBNegotiate(const unsigned int xid, struct cifs_ses *ses) server->negflavor = CIFS_NEGFLAVOR_UNENCAP; memcpy(ses->server->cryptkey, pSMBr->u.EncryptionKey, CIFS_CRYPTO_KEY_SIZE); - } else if ((pSMBr->hdr.Flags2 & SMBFLG2_EXT_SEC || - server->capabilities & CAP_EXTENDED_SECURITY) && - (pSMBr->EncryptionKeyLength == 0)) { + } else if (pSMBr->hdr.Flags2 & SMBFLG2_EXT_SEC || + server->capabilities & CAP_EXTENDED_SECURITY) { server->negflavor = CIFS_NEGFLAVOR_EXTENDED; rc = decode_ext_sec_blob(ses, pSMBr); } else if (server->sec_mode & SECMODE_PW_ENCRYPT) { -- cgit From 5f7fbf733c9dd6b58d40fa394313a5949b696f84 Mon Sep 17 00:00:00 2001 From: Steve French Date: Wed, 17 Dec 2014 22:52:58 -0600 Subject: Allow parsing vers=3.11 on cifs mount Parses and recognizes "vers=3.1.1" on cifs mount and allows sending 0x0311 as a new CIFS/SMB3 dialect. Subsequent patches will add the new negotiate contexts and updated session setup Reviewed-by: Jeff Layton Signed-off-by: Steve French --- fs/cifs/Kconfig | 9 +++++++++ fs/cifs/cifsglob.h | 7 +++++++ fs/cifs/connect.c | 10 ++++++++++ fs/cifs/smb2ops.c | 22 ++++++++++++++++++++++ fs/cifs/smb2pdu.c | 4 ++++ fs/cifs/smb2pdu.h | 10 +++++++--- 6 files changed, 59 insertions(+), 3 deletions(-) (limited to 'fs') diff --git a/fs/cifs/Kconfig b/fs/cifs/Kconfig index a2172f3f69e3..e7b478b49985 100644 --- a/fs/cifs/Kconfig +++ b/fs/cifs/Kconfig @@ -192,6 +192,15 @@ config CIFS_SMB2 options are also slightly simpler (compared to CIFS) due to protocol improvements. +config CIFS_SMB311 + bool "SMB3.1.1 network file system support (Experimental)" + depends on CIFS_SMB2 && INET + + help + This enables experimental support for the newest, SMB3.1.1, dialect. + This dialect includes improved security negotiation features. + If unsure, say N + config CIFS_FSCACHE bool "Provide CIFS client caching support" depends on CIFS=m && FSCACHE || CIFS=y && FSCACHE=y diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h index 22b289a3b1c4..71bf86e6de9a 100644 --- a/fs/cifs/cifsglob.h +++ b/fs/cifs/cifsglob.h @@ -171,6 +171,10 @@ enum smb_version { Smb_21, Smb_30, Smb_302, +#ifdef CONFIG_CIFS_SMB311 + Smb_311, +#endif /* SMB311 */ + Smb_version_err }; struct mid_q_entry; @@ -1617,4 +1621,7 @@ extern struct smb_version_values smb30_values; #define SMB302_VERSION_STRING "3.02" /*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */ extern struct smb_version_values smb302_values; +#define SMB311_VERSION_STRING "3.1.1" +/*extern struct smb_version_operations smb311_operations;*/ /* not needed yet */ +extern struct smb_version_values smb311_values; #endif /* _CIFS_GLOB_H */ diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c index 8383d5ea4202..9300b98d8584 100644 --- a/fs/cifs/connect.c +++ b/fs/cifs/connect.c @@ -280,6 +280,10 @@ static const match_table_t cifs_smb_version_tokens = { { Smb_21, SMB21_VERSION_STRING }, { Smb_30, SMB30_VERSION_STRING }, { Smb_302, SMB302_VERSION_STRING }, +#ifdef CONFIG_CIFS_SMB311 + { Smb_311, SMB311_VERSION_STRING }, +#endif /* SMB311 */ + { Smb_version_err, NULL } }; static int ip_connect(struct TCP_Server_Info *server); @@ -1133,6 +1137,12 @@ cifs_parse_smb_version(char *value, struct smb_vol *vol) vol->ops = &smb30_operations; /* currently identical with 3.0 */ vol->vals = &smb302_values; break; +#ifdef CONFIG_CIFS_SMB311 + case Smb_311: + vol->ops = &smb30_operations; /* currently identical with 3.0 */ + vol->vals = &smb311_values; + break; +#endif /* SMB311 */ #endif default: cifs_dbg(VFS, "Unknown vers= option specified: %s\n", value); diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c index 54daee5ad4c1..a7d520cc2cfd 100644 --- a/fs/cifs/smb2ops.c +++ b/fs/cifs/smb2ops.c @@ -1714,3 +1714,25 @@ struct smb_version_values smb302_values = { .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, .create_lease_size = sizeof(struct create_lease_v2), }; + +#ifdef CONFIG_CIFS_SMB311 +struct smb_version_values smb311_values = { + .version_string = SMB311_VERSION_STRING, + .protocol_id = SMB311_PROT_ID, + .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU, + .large_lock_type = 0, + .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK, + .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK, + .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, + .header_size = sizeof(struct smb2_hdr), + .max_header_size = MAX_SMB2_HDR_SIZE, + .read_rsp_size = sizeof(struct smb2_read_rsp) - 1, + .lock_cmd = SMB2_LOCK, + .cap_unix = 0, + .cap_nt_find = SMB2_NT_FIND, + .cap_large_files = SMB2_LARGE_FILES, + .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, + .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, + .create_lease_size = sizeof(struct create_lease_v2), +}; +#endif /* SMB311 */ diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c index 54cbe19d9c08..150dbe3e2822 100644 --- a/fs/cifs/smb2pdu.c +++ b/fs/cifs/smb2pdu.c @@ -393,6 +393,10 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses) 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"); +#ifdef CONFIG_CIFS_SMB311 + else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) + cifs_dbg(FYI, "negotiated smb3.1.1 dialect\n"); +#endif /* SMB311 */ else { cifs_dbg(VFS, "Illegal dialect returned by server %d\n", le16_to_cpu(rsp->DialectRevision)); diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h index 70867d54fb8b..994b34843c3a 100644 --- a/fs/cifs/smb2pdu.h +++ b/fs/cifs/smb2pdu.h @@ -191,7 +191,10 @@ struct smb2_negotiate_req { __le16 Reserved; /* MBZ */ __le32 Capabilities; __u8 ClientGUID[SMB2_CLIENT_GUID_SIZE]; - __le64 ClientStartTime; /* MBZ */ + /* In SMB3.02 and earlier next three were MBZ le64 ClientStartTime */ + __le32 NegotiateContextOffset; /* SMB3.1.1 only. MBZ earlier */ + __le16 NegotiateContextCount; /* SMB3.1.1 only. MBZ earlier */ + __le16 Reserved2; __le16 Dialects[1]; /* One dialect (vers=) at a time for now */ } __packed; @@ -200,6 +203,7 @@ struct smb2_negotiate_req { #define SMB21_PROT_ID 0x0210 #define SMB30_PROT_ID 0x0300 #define SMB302_PROT_ID 0x0302 +#define SMB311_PROT_ID 0x0311 #define BAD_PROT_ID 0xFFFF /* SecurityMode flags */ @@ -222,7 +226,7 @@ struct smb2_negotiate_rsp { __le16 StructureSize; /* Must be 65 */ __le16 SecurityMode; __le16 DialectRevision; - __le16 Reserved; /* MBZ */ + __le16 NegotiateContextCount; /* Prior to SMB3.1.1 was Reserved & MBZ */ __u8 ServerGUID[16]; __le32 Capabilities; __le32 MaxTransactSize; @@ -232,7 +236,7 @@ struct smb2_negotiate_rsp { __le64 ServerStartTime; __le16 SecurityBufferOffset; __le16 SecurityBufferLength; - __le32 Reserved2; /* may be any value, ignore */ + __le32 NegotiateContextOffset; /* Pre:SMB3.1.1 was reserved/ignored */ __u8 Buffer[1]; /* variable length GSS security buffer */ } __packed; -- cgit From eed0e1753cbe7a30758ad2ee5e2742dd7fda2c41 Mon Sep 17 00:00:00 2001 From: Steve French Date: Fri, 6 Feb 2015 00:03:52 -0600 Subject: Add defines and structs for smb3.1 dialect Add new structures and defines for SMB3.11 negotiate, session setup and tcon See MS-SMB2-diff.pdf section 2.2.3 for additional protocol documentation. Reviewed-by: Jeff Layton Signed-off-by: Steve French --- fs/cifs/smb2pdu.c | 2 +- fs/cifs/smb2pdu.h | 40 +++++++++++++++++++++++++++++++++++----- 2 files changed, 36 insertions(+), 6 deletions(-) (limited to 'fs') diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c index 150dbe3e2822..1270806376eb 100644 --- a/fs/cifs/smb2pdu.c +++ b/fs/cifs/smb2pdu.c @@ -576,7 +576,7 @@ ssetup_ntlmssp_authenticate: return rc; req->hdr.SessionId = 0; /* First session, not a reauthenticate */ - req->VcNumber = 0; /* MBZ */ + req->Flags = 0; /* MBZ */ /* to enable echos and oplocks */ req->hdr.CreditRequest = cpu_to_le16(3); diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h index 994b34843c3a..725283a7d887 100644 --- a/fs/cifs/smb2pdu.h +++ b/fs/cifs/smb2pdu.h @@ -136,9 +136,6 @@ struct smb2_transform_hdr { __u64 SessionId; } __packed; -/* Encryption Algorithms */ -#define SMB2_ENCRYPTION_AES128_CCM cpu_to_le16(0x0001) - /* * SMB2 flag definitions */ @@ -221,6 +218,32 @@ struct smb2_negotiate_req { #define SMB2_NT_FIND 0x00100000 #define SMB2_LARGE_FILES 0x00200000 +#define SMB311_SALT_SIZE 32 +/* Hash Algorithm Types */ +#define SMB2_PREAUTH_INTEGRITY_SHA512 0x0001 + +struct smb2_preauth_neg_context { + __le16 ContextType; /* 1 */ + __le16 DataLength; + __le32 Reserved; + __le16 HashAlgorithmCount; /* 1 */ + __le16 SaltLength; + __le16 HashAlgorithms; /* HashAlgorithms[0] since only one defined */ + __u8 Salt[SMB311_SALT_SIZE]; +} __packed; + +/* Encryption Algorithms Ciphers */ +#define SMB2_ENCRYPTION_AES128_CCM cpu_to_le16(0x0001) +#define SMB2_ENCRYPTION_AES128_GCM cpu_to_le16(0x0002) + +struct smb2_encryption_neg_context { + __le16 ContextType; /* 2 */ + __le16 DataLength; + __le32 Reserved; + __le16 CipherCount; /* 1 for time being, only AES-128-CCM */ + __le16 Ciphers; /* Ciphers[0] since only one used now */ +} __packed; + struct smb2_negotiate_rsp { struct smb2_hdr hdr; __le16 StructureSize; /* Must be 65 */ @@ -240,10 +263,14 @@ struct smb2_negotiate_rsp { __u8 Buffer[1]; /* variable length GSS security buffer */ } __packed; +/* Flags */ +#define SMB2_SESSION_REQ_FLAG_BINDING 0x01 +#define SMB2_SESSION_REQ_FLAG_ENCRYPT_DATA 0x04 + struct smb2_sess_setup_req { struct smb2_hdr hdr; __le16 StructureSize; /* Must be 25 */ - __u8 VcNumber; + __u8 Flags; __u8 SecurityMode; __le32 Capabilities; __le32 Channel; @@ -278,10 +305,13 @@ struct smb2_logoff_rsp { __le16 Reserved; } __packed; +/* Flags/Reserved for SMB3.1.1 */ +#define SMB2_SHAREFLAG_CLUSTER_RECONNECT 0x0001 + struct smb2_tree_connect_req { struct smb2_hdr hdr; __le16 StructureSize; /* Must be 9 */ - __le16 Reserved; + __le16 Reserved; /* Flags in SMB3.1.1 */ __le16 PathOffset; __le16 PathLength; __u8 Buffer[1]; /* variable length */ -- cgit From f799d6234b6f871ff0fc0d3d2f6f47c4df4505b7 Mon Sep 17 00:00:00 2001 From: Steve French Date: Thu, 18 Jun 2015 05:07:52 -0500 Subject: Make dialect negotiation warning message easier to read Dialect version and minor version are easier to read in hex Signed-off-by: Steve French --- fs/cifs/smb2pdu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs') diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c index 1270806376eb..0479e3c87a2c 100644 --- a/fs/cifs/smb2pdu.c +++ b/fs/cifs/smb2pdu.c @@ -398,7 +398,7 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses) cifs_dbg(FYI, "negotiated smb3.1.1 dialect\n"); #endif /* SMB311 */ else { - cifs_dbg(VFS, "Illegal dialect returned by server %d\n", + cifs_dbg(VFS, "Illegal dialect returned by server 0x%x\n", le16_to_cpu(rsp->DialectRevision)); rc = -EIO; goto neg_exit; -- cgit From 80bc83c360ef04cd1f5f8f0fb9c47669e702c980 Mon Sep 17 00:00:00 2001 From: Steve French Date: Thu, 18 Jun 2015 05:10:27 -0500 Subject: add struct FILE_STANDARD_INFO Signed-off-by: Gregor Beck Reviewed-by: Jeff Layton --- fs/cifs/cifspdu.h | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'fs') diff --git a/fs/cifs/cifspdu.h b/fs/cifs/cifspdu.h index 5f9822ac0245..998a66ffe01e 100644 --- a/fs/cifs/cifspdu.h +++ b/fs/cifs/cifspdu.h @@ -2310,6 +2310,16 @@ typedef struct { /* data block encoding of response to level 263 QPathInfo */ char FileName[1]; } __attribute__((packed)) FILE_ALL_INFO; /* level 0x107 QPathInfo */ +typedef struct { + __le64 AllocationSize; + __le64 EndOfFile; /* size ie offset to first free byte in file */ + __le32 NumberOfLinks; /* hard links */ + __u8 DeletePending; + __u8 Directory; + __u16 Pad; +} __attribute__((packed)) FILE_STANDARD_INFO; /* level 0x102 QPathInfo */ + + /* defines for enumerating possible values of the Unix type field below */ #define UNIX_FILE 0 #define UNIX_DIR 1 -- cgit From aab1893d5fbeb7c931e97189f54a71ab0ecbf4c7 Mon Sep 17 00:00:00 2001 From: Steve French Date: Tue, 23 Jun 2015 23:37:11 -0500 Subject: Add SMB3.11 mount option synonym for new dialect Most people think of SMB 3.1.1 as SMB version 3.11 so add synonym for "vers=3.1.1" of "vers=3.11" on mount. Also make sure that unlike SMB3.0 and 3.02 we don't send validate negotiate on mount (it is handled by negotiate contexts) - add list of SMB3.11 specific functions (distinct from 3.0 dialect). Signed-off-by: Steve French w --- fs/cifs/cifsglob.h | 3 +- fs/cifs/connect.c | 3 +- fs/cifs/smb2ops.c | 86 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 90 insertions(+), 2 deletions(-) (limited to 'fs') diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h index 71bf86e6de9a..a0212ec6f701 100644 --- a/fs/cifs/cifsglob.h +++ b/fs/cifs/cifsglob.h @@ -1622,6 +1622,7 @@ extern struct smb_version_values smb30_values; /*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */ extern struct smb_version_values smb302_values; #define SMB311_VERSION_STRING "3.1.1" -/*extern struct smb_version_operations smb311_operations;*/ /* not needed yet */ +#define ALT_SMB311_VERSION_STRING "3.11" +extern struct smb_version_operations smb311_operations; extern struct smb_version_values smb311_values; #endif /* _CIFS_GLOB_H */ diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c index 9300b98d8584..247f4dd228cc 100644 --- a/fs/cifs/connect.c +++ b/fs/cifs/connect.c @@ -282,6 +282,7 @@ static const match_table_t cifs_smb_version_tokens = { { Smb_302, SMB302_VERSION_STRING }, #ifdef CONFIG_CIFS_SMB311 { Smb_311, SMB311_VERSION_STRING }, + { Smb_311, ALT_SMB311_VERSION_STRING }, #endif /* SMB311 */ { Smb_version_err, NULL } }; @@ -1139,7 +1140,7 @@ cifs_parse_smb_version(char *value, struct smb_vol *vol) break; #ifdef CONFIG_CIFS_SMB311 case Smb_311: - vol->ops = &smb30_operations; /* currently identical with 3.0 */ + vol->ops = &smb311_operations; vol->vals = &smb311_values; break; #endif /* SMB311 */ diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c index a7d520cc2cfd..c7d228c4006a 100644 --- a/fs/cifs/smb2ops.c +++ b/fs/cifs/smb2ops.c @@ -1635,6 +1635,92 @@ struct smb_version_operations smb30_operations = { .fallocate = smb3_fallocate, }; +#ifdef CONFIG_CIFS_SMB311 +struct smb_version_operations smb311_operations = { + .compare_fids = smb2_compare_fids, + .setup_request = smb2_setup_request, + .setup_async_request = smb2_setup_async_request, + .check_receive = smb2_check_receive, + .add_credits = smb2_add_credits, + .set_credits = smb2_set_credits, + .get_credits_field = smb2_get_credits_field, + .get_credits = smb2_get_credits, + .wait_mtu_credits = smb2_wait_mtu_credits, + .get_next_mid = smb2_get_next_mid, + .read_data_offset = smb2_read_data_offset, + .read_data_length = smb2_read_data_length, + .map_error = map_smb2_to_linux_error, + .find_mid = smb2_find_mid, + .check_message = smb2_check_message, + .dump_detail = smb2_dump_detail, + .clear_stats = smb2_clear_stats, + .print_stats = smb2_print_stats, + .dump_share_caps = smb2_dump_share_caps, + .is_oplock_break = smb2_is_valid_oplock_break, + .downgrade_oplock = smb2_downgrade_oplock, + .need_neg = smb2_need_neg, + .negotiate = smb2_negotiate, + .negotiate_wsize = smb2_negotiate_wsize, + .negotiate_rsize = smb2_negotiate_rsize, + .sess_setup = SMB2_sess_setup, + .logoff = SMB2_logoff, + .tree_connect = SMB2_tcon, + .tree_disconnect = SMB2_tdis, + .qfs_tcon = smb3_qfs_tcon, + .is_path_accessible = smb2_is_path_accessible, + .can_echo = smb2_can_echo, + .echo = SMB2_echo, + .query_path_info = smb2_query_path_info, + .get_srv_inum = smb2_get_srv_inum, + .query_file_info = smb2_query_file_info, + .set_path_size = smb2_set_path_size, + .set_file_size = smb2_set_file_size, + .set_file_info = smb2_set_file_info, + .set_compression = smb2_set_compression, + .mkdir = smb2_mkdir, + .mkdir_setinfo = smb2_mkdir_setinfo, + .rmdir = smb2_rmdir, + .unlink = smb2_unlink, + .rename = smb2_rename_path, + .create_hardlink = smb2_create_hardlink, + .query_symlink = smb2_query_symlink, + .query_mf_symlink = smb3_query_mf_symlink, + .create_mf_symlink = smb3_create_mf_symlink, + .open = smb2_open_file, + .set_fid = smb2_set_fid, + .close = smb2_close_file, + .flush = smb2_flush_file, + .async_readv = smb2_async_readv, + .async_writev = smb2_async_writev, + .sync_read = smb2_sync_read, + .sync_write = smb2_sync_write, + .query_dir_first = smb2_query_dir_first, + .query_dir_next = smb2_query_dir_next, + .close_dir = smb2_close_dir, + .calc_smb_size = smb2_calc_size, + .is_status_pending = smb2_is_status_pending, + .oplock_response = smb2_oplock_response, + .queryfs = smb2_queryfs, + .mand_lock = smb2_mand_lock, + .mand_unlock_range = smb2_unlock_range, + .push_mand_locks = smb2_push_mandatory_locks, + .get_lease_key = smb2_get_lease_key, + .set_lease_key = smb2_set_lease_key, + .new_lease_key = smb2_new_lease_key, + .generate_signingkey = generate_smb3signingkey, + .calc_signature = smb3_calc_signature, + .is_read_op = smb21_is_read_op, + .set_oplock_level = smb3_set_oplock_level, + .create_lease_buf = smb3_create_lease_buf, + .parse_lease_buf = smb3_parse_lease_buf, + .clone_range = smb2_clone_range, +/* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */ + .wp_retry_size = smb2_wp_retry_size, + .dir_needs_close = smb2_dir_needs_close, + .fallocate = smb3_fallocate, +}; +#endif /* CIFS_SMB311 */ + struct smb_version_values smb20_values = { .version_string = SMB20_VERSION_STRING, .protocol_id = SMB20_PROT_ID, -- cgit From 02b1666544c08e245cb4e2253ed575f8128943d6 Mon Sep 17 00:00:00 2001 From: Steve French Date: Sat, 27 Jun 2015 21:18:36 -0700 Subject: Add reflink copy over SMB3.11 with new FSCTL_DUPLICATE_EXTENTS Getting fantastic copy performance with cp --reflink over SMB3.11 using the new FSCTL_DUPLICATE_EXTENTS. This FSCTL was added in the SMB3.11 dialect (testing was against REFS file system) so have put it as a 3.11 protocol specific operation ("vers=3.1.1" on the mount). Tested at the SMB3 plugfest in Redmond. It depends on the new FS Attribute (BLOCK_REFCOUNTING) which is used to advertise support for the ability to do this ioctl (if you can support multiple files pointing to the same block than this refcounting ability or equivalent is needed to support the new reflink-like duplicate extent SMB3 ioctl. Signed-off-by: Steve French --- fs/cifs/cifsglob.h | 3 +++ fs/cifs/cifspdu.h | 2 ++ fs/cifs/ioctl.c | 16 +++++++++++++--- fs/cifs/smb2ops.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++ fs/cifs/smb2pdu.h | 8 ++++++++ fs/cifs/smbfsctl.h | 1 + 6 files changed, 75 insertions(+), 3 deletions(-) (limited to 'fs') diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h index a0212ec6f701..81194e6c7601 100644 --- a/fs/cifs/cifsglob.h +++ b/fs/cifs/cifsglob.h @@ -390,6 +390,9 @@ struct smb_version_operations { int (*clone_range)(const unsigned int, struct cifsFileInfo *src_file, struct cifsFileInfo *target_file, u64 src_off, u64 len, u64 dest_off); + int (*duplicate_extents)(const unsigned int, struct cifsFileInfo *src, + struct cifsFileInfo *target_file, u64 src_off, u64 len, + u64 dest_off); int (*validate_negotiate)(const unsigned int, struct cifs_tcon *); ssize_t (*query_all_EAs)(const unsigned int, struct cifs_tcon *, const unsigned char *, const unsigned char *, char *, diff --git a/fs/cifs/cifspdu.h b/fs/cifs/cifspdu.h index 998a66ffe01e..47b030da0781 100644 --- a/fs/cifs/cifspdu.h +++ b/fs/cifs/cifspdu.h @@ -2255,6 +2255,8 @@ typedef struct { /* List of FileSystemAttributes - see 2.5.1 of MS-FSCC */ +#define FILE_SUPPORTS_SPARSE_VDL 0x10000000 /* faster nonsparse extend */ +#define FILE_SUPPORTS_BLOCK_REFCOUNTING 0x08000000 /* allow ioctl dup extents */ #define FILE_SUPPORT_INTEGRITY_STREAMS 0x04000000 #define FILE_SUPPORTS_USN_JOURNAL 0x02000000 #define FILE_SUPPORTS_OPEN_BY_FILE_ID 0x01000000 diff --git a/fs/cifs/ioctl.c b/fs/cifs/ioctl.c index 8b7898b7670f..7843b19ef5be 100644 --- a/fs/cifs/ioctl.c +++ b/fs/cifs/ioctl.c @@ -31,12 +31,14 @@ #include "cifsproto.h" #include "cifs_debug.h" #include "cifsfs.h" +#include #define CIFS_IOCTL_MAGIC 0xCF #define CIFS_IOC_COPYCHUNK_FILE _IOW(CIFS_IOCTL_MAGIC, 3, int) static long cifs_ioctl_clone(unsigned int xid, struct file *dst_file, - unsigned long srcfd, u64 off, u64 len, u64 destoff) + unsigned long srcfd, u64 off, u64 len, u64 destoff, + bool dup_extents) { int rc; struct cifsFileInfo *smb_file_target = dst_file->private_data; @@ -109,9 +111,14 @@ static long cifs_ioctl_clone(unsigned int xid, struct file *dst_file, truncate_inode_pages_range(&target_inode->i_data, destoff, PAGE_CACHE_ALIGN(destoff + len)-1); - if (target_tcon->ses->server->ops->clone_range) + if (dup_extents && target_tcon->ses->server->ops->duplicate_extents) + rc = target_tcon->ses->server->ops->duplicate_extents(xid, + smb_file_src, smb_file_target, off, len, destoff); + else if (!dup_extents && target_tcon->ses->server->ops->clone_range) rc = target_tcon->ses->server->ops->clone_range(xid, smb_file_src, smb_file_target, off, len, destoff); + else + rc = -EOPNOTSUPP; /* force revalidate of size and timestamps of target file now that target is updated on the server */ @@ -205,7 +212,10 @@ long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg) } break; case CIFS_IOC_COPYCHUNK_FILE: - rc = cifs_ioctl_clone(xid, filep, arg, 0, 0, 0); + rc = cifs_ioctl_clone(xid, filep, arg, 0, 0, 0, false); + break; + case BTRFS_IOC_CLONE: + rc = cifs_ioctl_clone(xid, filep, arg, 0, 0, 0, true); break; default: cifs_dbg(FYI, "unsupported ioctl\n"); diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c index c7d228c4006a..b1e9c0f1b24c 100644 --- a/fs/cifs/smb2ops.c +++ b/fs/cifs/smb2ops.c @@ -806,6 +806,53 @@ smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon, cfile->fid.volatile_fid, cfile->pid, &eof, false); } +#ifdef CONFIG_CIFS_SMB311 +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; + char *retbuf = NULL; + 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", + 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), + (char **)&retbuf, + &ret_data_len); + + if (ret_data_len > 0) + cifs_dbg(FYI, "non-zero response length in duplicate extents"); + +duplicate_extents_out: + return rc; +} +#endif /* CONFIG_CIFS_SMB311 */ + + static int smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon, struct cifsFileInfo *cfile) @@ -1714,6 +1761,7 @@ struct smb_version_operations smb311_operations = { .create_lease_buf = smb3_create_lease_buf, .parse_lease_buf = smb3_parse_lease_buf, .clone_range = smb2_clone_range, + .duplicate_extents = smb2_duplicate_extents, /* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */ .wp_retry_size = smb2_wp_retry_size, .dir_needs_close = smb2_dir_needs_close, diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h index 725283a7d887..8e7bbe54ebb0 100644 --- a/fs/cifs/smb2pdu.h +++ b/fs/cifs/smb2pdu.h @@ -654,6 +654,14 @@ struct compress_ioctl { __le16 CompressionState; /* See cifspdu.h for possible flag values */ } __packed; +struct duplicate_extents_to_file { + __u64 PersistentFileHandle; /* source file handle, opaque endianness */ + __u64 VolatileFileHandle; + __le64 SourceFileOffset; + __le64 TargetFileOffset; + __le64 ByteCount; /* Bytes to be copied */ +} __packed; + struct smb2_ioctl_req { struct smb2_hdr hdr; __le16 StructureSize; /* Must be 57 */ diff --git a/fs/cifs/smbfsctl.h b/fs/cifs/smbfsctl.h index 83efa59535be..d098da678668 100644 --- a/fs/cifs/smbfsctl.h +++ b/fs/cifs/smbfsctl.h @@ -78,6 +78,7 @@ #define FSCTL_QUERY_ALLOCATED_RANGES 0x000940CF /* BB add struct */ #define FSCTL_SET_DEFECT_MANAGEMENT 0x00098134 /* BB add struct */ #define FSCTL_FILE_LEVEL_TRIM 0x00098208 /* BB add struct */ +#define FSCTL_DUPLICATE_EXTENTS_TO_FILE 0x00098344 #define FSCTL_SIS_LINK_FILES 0x0009C104 #define FSCTL_PIPE_PEEK 0x0011400C /* BB add struct */ #define FSCTL_PIPE_TRANSCEIVE 0x0011C017 /* BB add struct */ -- cgit From 9d1b06602eb6716220c5988735c0b4944d62abaa Mon Sep 17 00:00:00 2001 From: Steve French Date: Wed, 24 Jun 2015 02:12:19 -0500 Subject: Add Get/Set Integrity Information structure definitions Signed-off-by: Steve French --- fs/cifs/smb2pdu.h | 22 ++++++++++++++++++++++ fs/cifs/smbfsctl.h | 2 ++ 2 files changed, 24 insertions(+) (limited to 'fs') diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h index 8e7bbe54ebb0..c302e82f2575 100644 --- a/fs/cifs/smb2pdu.h +++ b/fs/cifs/smb2pdu.h @@ -621,6 +621,28 @@ struct copychunk_ioctl_rsp { __le32 TotalBytesWritten; } __packed; +struct fsctl_set_integrity_information_req { + __le16 ChecksumAlgorithm; + __le16 Reserved; + __le32 Flags; +} __packed; + +struct fsctl_get_integrity_information_rsp { + __le16 ChecksumAlgorithm; + __le16 Reserved; + __le32 Flags; + __le32 ChecksumChunkSizeInBytes; + __le32 ClusterSizeInBytes; +} __packed; + +/* Integrity ChecksumAlgorithm choices for above */ +#define CHECKSUM_TYPE_NONE 0x0000 +#define CHECKSUM_TYPE_CRC64 0x0002 + +/* Integrity flags for above */ +#define FSCTL_INTEGRITY_FLAG_CHECKSUM_ENFORCEMENT_OFF 0x00000001 + + struct validate_negotiate_info_req { __le32 Capabilities; __u8 Guid[SMB2_CLIENT_GUID_SIZE]; diff --git a/fs/cifs/smbfsctl.h b/fs/cifs/smbfsctl.h index d098da678668..a639d0dab453 100644 --- a/fs/cifs/smbfsctl.h +++ b/fs/cifs/smbfsctl.h @@ -75,11 +75,13 @@ #define FSCTL_QUERY_SPARING_INFO 0x00090138 /* BB add struct */ #define FSCTL_SET_ZERO_ON_DEALLOC 0x00090194 /* BB add struct */ #define FSCTL_SET_SHORT_NAME_BEHAVIOR 0x000901B4 /* BB add struct */ +#define FSCTL_GET_INTEGRITY_INFORMATION 0x0009027C #define FSCTL_QUERY_ALLOCATED_RANGES 0x000940CF /* BB add struct */ #define FSCTL_SET_DEFECT_MANAGEMENT 0x00098134 /* BB add struct */ #define FSCTL_FILE_LEVEL_TRIM 0x00098208 /* BB add struct */ #define FSCTL_DUPLICATE_EXTENTS_TO_FILE 0x00098344 #define FSCTL_SIS_LINK_FILES 0x0009C104 +#define FSCTL_SET_INTEGRITY_INFORMATION 0x0009C280 #define FSCTL_PIPE_PEEK 0x0011400C /* BB add struct */ #define FSCTL_PIPE_TRANSCEIVE 0x0011C017 /* BB add struct */ /* strange that the number for this op is not sequential with previous op */ -- cgit From b3152e2c7aa9ad0c50085738d048fbf16d01d32d Mon Sep 17 00:00:00 2001 From: Steve French Date: Wed, 24 Jun 2015 03:17:02 -0500 Subject: Add ioctl to set integrity set integrity increases reliability of files stored on SMB3 servers. Add ioctl to allow setting this on files on SMB3 and later mounts. Signed-off-by: Steve French --- fs/cifs/cifsglob.h | 2 ++ fs/cifs/ioctl.c | 11 +++++++++++ fs/cifs/smb2ops.c | 24 ++++++++++++++++++++++++ fs/cifs/smb2pdu.h | 1 + 4 files changed, 38 insertions(+) (limited to 'fs') diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h index 81194e6c7601..b406a32deb1f 100644 --- a/fs/cifs/cifsglob.h +++ b/fs/cifs/cifsglob.h @@ -372,6 +372,8 @@ struct smb_version_operations { void (*new_lease_key)(struct cifs_fid *); int (*generate_signingkey)(struct cifs_ses *); int (*calc_signature)(struct smb_rqst *, struct TCP_Server_Info *); + int (*set_integrity)(const unsigned int, struct cifs_tcon *tcon, + struct cifsFileInfo *src_file); int (*query_mf_symlink)(unsigned int, struct cifs_tcon *, struct cifs_sb_info *, const unsigned char *, char *, unsigned int *); diff --git a/fs/cifs/ioctl.c b/fs/cifs/ioctl.c index 7843b19ef5be..49b8b6e41a18 100644 --- a/fs/cifs/ioctl.c +++ b/fs/cifs/ioctl.c @@ -35,6 +35,7 @@ #define CIFS_IOCTL_MAGIC 0xCF #define CIFS_IOC_COPYCHUNK_FILE _IOW(CIFS_IOCTL_MAGIC, 3, int) +#define CIFS_IOC_SET_INTEGRITY _IO(CIFS_IOCTL_MAGIC, 4) static long cifs_ioctl_clone(unsigned int xid, struct file *dst_file, unsigned long srcfd, u64 off, u64 len, u64 destoff, @@ -217,6 +218,16 @@ long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg) case BTRFS_IOC_CLONE: rc = cifs_ioctl_clone(xid, filep, arg, 0, 0, 0, true); break; + case CIFS_IOC_SET_INTEGRITY: + if (pSMBFile == NULL) + break; + tcon = tlink_tcon(pSMBFile->tlink); + if (tcon->ses->server->ops->set_integrity) + rc = tcon->ses->server->ops->set_integrity(xid, + tcon, pSMBFile); + else + rc = -EOPNOTSUPP; + break; default: cifs_dbg(FYI, "unsupported ioctl\n"); break; diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c index b1e9c0f1b24c..df91bcf56d67 100644 --- a/fs/cifs/smb2ops.c +++ b/fs/cifs/smb2ops.c @@ -861,6 +861,28 @@ smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon, 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; + char *retbuf = NULL; + 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), + (char **)&retbuf, + &ret_data_len); + +} + static int smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon, const char *path, struct cifs_sb_info *cifs_sb, @@ -1671,6 +1693,7 @@ struct smb_version_operations smb30_operations = { .new_lease_key = smb2_new_lease_key, .generate_signingkey = generate_smb3signingkey, .calc_signature = smb3_calc_signature, + .set_integrity = smb3_set_integrity, .is_read_op = smb21_is_read_op, .set_oplock_level = smb3_set_oplock_level, .create_lease_buf = smb3_create_lease_buf, @@ -1756,6 +1779,7 @@ struct smb_version_operations smb311_operations = { .new_lease_key = smb2_new_lease_key, .generate_signingkey = generate_smb3signingkey, .calc_signature = smb3_calc_signature, + .set_integrity = smb3_set_integrity, .is_read_op = smb21_is_read_op, .set_oplock_level = smb3_set_oplock_level, .create_lease_buf = smb3_create_lease_buf, diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h index c302e82f2575..2d91c2a7b218 100644 --- a/fs/cifs/smb2pdu.h +++ b/fs/cifs/smb2pdu.h @@ -638,6 +638,7 @@ struct fsctl_get_integrity_information_rsp { /* Integrity ChecksumAlgorithm choices for above */ #define CHECKSUM_TYPE_NONE 0x0000 #define CHECKSUM_TYPE_CRC64 0x0002 +#define CHECKSUM_TYPE_UNCHANGED 0xFFFF /* set only */ /* Integrity flags for above */ #define FSCTL_INTEGRITY_FLAG_CHECKSUM_ENFORCEMENT_OFF 0x00000001 -- cgit From ebb3a9d4ba3babd19c83b96fc88fc9b0d2f7d2d6 Mon Sep 17 00:00:00 2001 From: Steve French Date: Thu, 18 Jun 2015 04:49:47 -0500 Subject: Update negotiate protocol for SMB3.11 dialect Send negotiate contexts when SMB3.11 dialect is negotiated (ie the preauth and the encryption contexts) and Initialize SMB3.11 preauth negotiate context salt to random bytes Followon patch will update session setup and tree connect Signed-off-by: Steve French --- fs/cifs/smb2pdu.c | 59 +++++++++++++++++++++++++++++++++++++++++++++++++++++-- fs/cifs/smb2pdu.h | 6 +++--- 2 files changed, 60 insertions(+), 5 deletions(-) (limited to 'fs') diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c index 0479e3c87a2c..b8b4f08ee094 100644 --- a/fs/cifs/smb2pdu.c +++ b/fs/cifs/smb2pdu.c @@ -304,6 +304,59 @@ small_smb2_init(__le16 smb2_command, struct cifs_tcon *tcon, return rc; } +#ifdef CONFIG_CIFS_SMB311 +/* offset is sizeof smb2_negotiate_req - 4 but rounded up to 8 bytes */ +#define OFFSET_OF_NEG_CONTEXT 0x68 /* sizeof(struct smb2_negotiate_req) - 4 */ + + +#define SMB2_PREAUTH_INTEGRITY_CAPABILITIES cpu_to_le16(1) +#define SMB2_ENCRYPTION_CAPABILITIES cpu_to_le16(2) + +static void +build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt) +{ + pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES; + pneg_ctxt->DataLength = cpu_to_le16(38); + pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1); + pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE); + get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE); + pneg_ctxt->HashAlgorithms = SMB2_PREAUTH_INTEGRITY_SHA512; +} + +static void +build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt) +{ + pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES; + pneg_ctxt->DataLength = cpu_to_le16(6); + pneg_ctxt->CipherCount = cpu_to_le16(2); + pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM; + pneg_ctxt->Ciphers[1] = SMB2_ENCRYPTION_AES128_CCM; +} + +static void +assemble_neg_contexts(struct smb2_negotiate_req *req) +{ + + /* +4 is to account for the RFC1001 len field */ + char *pneg_ctxt = (char *)req + OFFSET_OF_NEG_CONTEXT + 4; + + build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt); + /* Add 2 to size to round to 8 byte boundary */ + pneg_ctxt += 2 + sizeof(struct smb2_preauth_neg_context); + build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt); + req->NegotiateContextOffset = cpu_to_le32(OFFSET_OF_NEG_CONTEXT); + req->NegotiateContextCount = cpu_to_le16(2); + inc_rfc1001_len(req, 4 + sizeof(struct smb2_preauth_neg_context) + 2 + + sizeof(struct smb2_encryption_neg_context)); /* calculate hash */ +} +#else +static void assemble_neg_contexts(struct smb2_negotiate_req *req) +{ + return; +} +#endif /* SMB311 */ + + /* * * SMB2 Worker functions follow: @@ -363,10 +416,12 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses) /* 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 + else { memcpy(req->ClientGUID, server->client_guid, SMB2_CLIENT_GUID_SIZE); - + if (ses->server->vals->protocol_id == SMB311_PROT_ID) + assemble_neg_contexts(req); + } iov[0].iov_base = (char *)req; /* 4 for rfc1002 length field */ iov[0].iov_len = get_rfc1002_length(req) + 4; diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h index 2d91c2a7b218..451108284a2f 100644 --- a/fs/cifs/smb2pdu.h +++ b/fs/cifs/smb2pdu.h @@ -220,7 +220,7 @@ struct smb2_negotiate_req { #define SMB311_SALT_SIZE 32 /* Hash Algorithm Types */ -#define SMB2_PREAUTH_INTEGRITY_SHA512 0x0001 +#define SMB2_PREAUTH_INTEGRITY_SHA512 cpu_to_le16(0x0001) struct smb2_preauth_neg_context { __le16 ContextType; /* 1 */ @@ -240,8 +240,8 @@ struct smb2_encryption_neg_context { __le16 ContextType; /* 2 */ __le16 DataLength; __le32 Reserved; - __le16 CipherCount; /* 1 for time being, only AES-128-CCM */ - __le16 Ciphers; /* Ciphers[0] since only one used now */ + __le16 CipherCount; /* AES-128-GCM and AES-128-CCM */ + __le16 Ciphers[2]; /* Ciphers[0] since only one used now */ } __packed; struct smb2_negotiate_rsp { -- cgit From 1dfd18d0571231d030f325bfcd80f5c42a56a53e Mon Sep 17 00:00:00 2001 From: Sachin Prabhu Date: Tue, 16 Jun 2015 16:36:17 +0100 Subject: cifs: Unset CIFS_MOUNT_POSIX_PATHS flag when following dfs mounts MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit In a dfs setup where the client transitions from a server which supports posix paths to a server which doesn't support posix paths, the flag CIFS_MOUNT_POSIX_PATHS is not reset. This leads to the wrong directory separator being used causing smb commands to fail. Consider the following case where a dfs share on a samba server points to a share on windows smb server. # mount -t cifs -o .. //vm140-31/dfsroot/testwin/ # ls -l /mnt; touch /mnt/a total 0 touch: cannot touch ‘/mnt/a’: No such file or directory Signed-off-by: Sachin Prabhu Acked-by: Jeff Layton Signed-off-by: Steve French --- fs/cifs/connect.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'fs') diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c index 247f4dd228cc..773f4dc77630 100644 --- a/fs/cifs/connect.c +++ b/fs/cifs/connect.c @@ -3472,6 +3472,8 @@ try_mount_again: else if (ses) cifs_put_smb_ses(ses); + cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_POSIX_PATHS; + free_xid(xid); } #endif -- cgit