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-rw-r--r--fs/smb/common/smb2pdu.h53
-rw-r--r--fs/smb/common/smbacl.h3
-rw-r--r--fs/smb/common/smbdirect/smbdirect.h37
-rw-r--r--fs/smb/common/smbdirect/smbdirect_pdu.h55
-rw-r--r--fs/smb/common/smbdirect/smbdirect_socket.h161
-rw-r--r--fs/smb/common/smbfsctl.h3
6 files changed, 297 insertions, 15 deletions
diff --git a/fs/smb/common/smb2pdu.h b/fs/smb/common/smb2pdu.h
index 3c7c706c797d..f79a5165a7cc 100644
--- a/fs/smb/common/smb2pdu.h
+++ b/fs/smb/common/smb2pdu.h
@@ -95,6 +95,9 @@
*/
#define SMB3_DEFAULT_IOSIZE (4 * 1024 * 1024)
+/* According to MS-SMB2 specification The minimum recommended value is 65536.*/
+#define CIFS_MIN_DEFAULT_IOSIZE (65536)
+
/*
* SMB2 Header Definition
*
@@ -1550,15 +1553,27 @@ struct reparse_symlink_data_buffer {
__u8 PathBuffer[]; /* Variable Length */
} __packed;
-/* See MS-FSCC 2.1.2.6 and cifspdu.h for struct reparse_posix_data */
+/* For IO_REPARSE_TAG_NFS - see MS-FSCC 2.1.2.6 */
+#define NFS_SPECFILE_LNK 0x00000000014B4E4C
+#define NFS_SPECFILE_CHR 0x0000000000524843
+#define NFS_SPECFILE_BLK 0x00000000004B4C42
+#define NFS_SPECFILE_FIFO 0x000000004F464946
+#define NFS_SPECFILE_SOCK 0x000000004B434F53
+struct reparse_nfs_data_buffer {
+ __le32 ReparseTag;
+ __le16 ReparseDataLength;
+ __u16 Reserved;
+ __le64 InodeType; /* NFS_SPECFILE_* */
+ __u8 DataBuffer[];
+} __packed;
-/* For IO_REPARSE_TAG_LX_SYMLINK */
+/* For IO_REPARSE_TAG_LX_SYMLINK - see MS-FSCC 2.1.2.7 */
struct reparse_wsl_symlink_data_buffer {
__le32 ReparseTag;
__le16 ReparseDataLength;
__u16 Reserved;
- __le32 Flags;
- __u8 PathBuffer[]; /* Variable Length UTF-8 string without nul-term */
+ __le32 Version; /* Always 2 */
+ __u8 Target[]; /* Variable Length UTF-8 string without nul-term */
} __packed;
struct validate_negotiate_info_req {
@@ -1695,23 +1710,33 @@ struct smb2_file_internal_info {
} __packed; /* level 6 Query */
struct smb2_file_rename_info { /* encoding of request for level 10 */
- __u8 ReplaceIfExists; /* 1 = replace existing target with new */
- /* 0 = fail if target already exists */
- __u8 Reserved[7];
- __u64 RootDirectory; /* MBZ for network operations (why says spec?) */
- __le32 FileNameLength;
+ /* New members MUST be added within the struct_group() macro below. */
+ __struct_group(smb2_file_rename_info_hdr, __hdr, __packed,
+ __u8 ReplaceIfExists; /* 1 = replace existing target with new */
+ /* 0 = fail if target already exists */
+ __u8 Reserved[7];
+ __u64 RootDirectory; /* MBZ for network operations (why says spec?) */
+ __le32 FileNameLength;
+ );
char FileName[]; /* New name to be assigned */
/* padding - overall struct size must be >= 24 so filename + pad >= 6 */
} __packed; /* level 10 Set */
+static_assert(offsetof(struct smb2_file_rename_info, FileName) == sizeof(struct smb2_file_rename_info_hdr),
+ "struct member likely outside of __struct_group()");
struct smb2_file_link_info { /* encoding of request for level 11 */
- __u8 ReplaceIfExists; /* 1 = replace existing link with new */
- /* 0 = fail if link already exists */
- __u8 Reserved[7];
- __u64 RootDirectory; /* MBZ for network operations (why says spec?) */
- __le32 FileNameLength;
+ /* New members MUST be added within the struct_group() macro below. */
+ __struct_group(smb2_file_link_info_hdr, __hdr, __packed,
+ __u8 ReplaceIfExists; /* 1 = replace existing link with new */
+ /* 0 = fail if link already exists */
+ __u8 Reserved[7];
+ __u64 RootDirectory; /* MBZ for network operations (why says spec?) */
+ __le32 FileNameLength;
+ );
char FileName[]; /* Name to be assigned to new link */
} __packed; /* level 11 Set */
+static_assert(offsetof(struct smb2_file_link_info, FileName) == sizeof(struct smb2_file_link_info_hdr),
+ "struct member likely outside of __struct_group()");
/*
* This level 18, although with struct with same name is different from cifs
diff --git a/fs/smb/common/smbacl.h b/fs/smb/common/smbacl.h
index 6a60698fc6f0..a624ec9e4a14 100644
--- a/fs/smb/common/smbacl.h
+++ b/fs/smb/common/smbacl.h
@@ -107,7 +107,8 @@ struct smb_sid {
struct smb_acl {
__le16 revision; /* revision level */
__le16 size;
- __le32 num_aces;
+ __le16 num_aces;
+ __le16 reserved;
} __attribute__((packed));
struct smb_ace {
diff --git a/fs/smb/common/smbdirect/smbdirect.h b/fs/smb/common/smbdirect/smbdirect.h
new file mode 100644
index 000000000000..b9a385344ff3
--- /dev/null
+++ b/fs/smb/common/smbdirect/smbdirect.h
@@ -0,0 +1,37 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2017, Microsoft Corporation.
+ * Copyright (C) 2018, LG Electronics.
+ */
+
+#ifndef __FS_SMB_COMMON_SMBDIRECT_SMBDIRECT_H__
+#define __FS_SMB_COMMON_SMBDIRECT_SMBDIRECT_H__
+
+/* SMB-DIRECT buffer descriptor V1 structure [MS-SMBD] 2.2.3.1 */
+struct smbdirect_buffer_descriptor_v1 {
+ __le64 offset;
+ __le32 token;
+ __le32 length;
+} __packed;
+
+/*
+ * Connection parameters mostly from [MS-SMBD] 3.1.1.1
+ *
+ * These are setup and negotiated at the beginning of a
+ * connection and remain constant unless explicitly changed.
+ *
+ * Some values are important for the upper layer.
+ */
+struct smbdirect_socket_parameters {
+ __u16 recv_credit_max;
+ __u16 send_credit_target;
+ __u32 max_send_size;
+ __u32 max_fragmented_send_size;
+ __u32 max_recv_size;
+ __u32 max_fragmented_recv_size;
+ __u32 max_read_write_size;
+ __u32 keepalive_interval_msec;
+ __u32 keepalive_timeout_msec;
+} __packed;
+
+#endif /* __FS_SMB_COMMON_SMBDIRECT_SMBDIRECT_H__ */
diff --git a/fs/smb/common/smbdirect/smbdirect_pdu.h b/fs/smb/common/smbdirect/smbdirect_pdu.h
new file mode 100644
index 000000000000..ae9fdb05ce23
--- /dev/null
+++ b/fs/smb/common/smbdirect/smbdirect_pdu.h
@@ -0,0 +1,55 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (c) 2017 Stefan Metzmacher
+ */
+
+#ifndef __FS_SMB_COMMON_SMBDIRECT_SMBDIRECT_PDU_H__
+#define __FS_SMB_COMMON_SMBDIRECT_SMBDIRECT_PDU_H__
+
+#define SMBDIRECT_V1 0x0100
+
+/* SMBD negotiation request packet [MS-SMBD] 2.2.1 */
+struct smbdirect_negotiate_req {
+ __le16 min_version;
+ __le16 max_version;
+ __le16 reserved;
+ __le16 credits_requested;
+ __le32 preferred_send_size;
+ __le32 max_receive_size;
+ __le32 max_fragmented_size;
+} __packed;
+
+/* SMBD negotiation response packet [MS-SMBD] 2.2.2 */
+struct smbdirect_negotiate_resp {
+ __le16 min_version;
+ __le16 max_version;
+ __le16 negotiated_version;
+ __le16 reserved;
+ __le16 credits_requested;
+ __le16 credits_granted;
+ __le32 status;
+ __le32 max_readwrite_size;
+ __le32 preferred_send_size;
+ __le32 max_receive_size;
+ __le32 max_fragmented_size;
+} __packed;
+
+#define SMBDIRECT_DATA_MIN_HDR_SIZE 0x14
+#define SMBDIRECT_DATA_OFFSET 0x18
+
+#define SMBDIRECT_FLAG_RESPONSE_REQUESTED 0x0001
+
+/* SMBD data transfer packet with payload [MS-SMBD] 2.2.3 */
+struct smbdirect_data_transfer {
+ __le16 credits_requested;
+ __le16 credits_granted;
+ __le16 flags;
+ __le16 reserved;
+ __le32 remaining_data_length;
+ __le32 data_offset;
+ __le32 data_length;
+ __le32 padding;
+ __u8 buffer[];
+} __packed;
+
+#endif /* __FS_SMB_COMMON_SMBDIRECT_SMBDIRECT_PDU_H__ */
diff --git a/fs/smb/common/smbdirect/smbdirect_socket.h b/fs/smb/common/smbdirect/smbdirect_socket.h
new file mode 100644
index 000000000000..3c4a8d627aa3
--- /dev/null
+++ b/fs/smb/common/smbdirect/smbdirect_socket.h
@@ -0,0 +1,161 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (c) 2025 Stefan Metzmacher
+ */
+
+#ifndef __FS_SMB_COMMON_SMBDIRECT_SMBDIRECT_SOCKET_H__
+#define __FS_SMB_COMMON_SMBDIRECT_SMBDIRECT_SOCKET_H__
+
+enum smbdirect_socket_status {
+ SMBDIRECT_SOCKET_CREATED,
+ SMBDIRECT_SOCKET_CONNECTING,
+ SMBDIRECT_SOCKET_CONNECTED,
+ SMBDIRECT_SOCKET_NEGOTIATE_FAILED,
+ SMBDIRECT_SOCKET_DISCONNECTING,
+ SMBDIRECT_SOCKET_DISCONNECTED,
+ SMBDIRECT_SOCKET_DESTROYED
+};
+
+struct smbdirect_socket {
+ enum smbdirect_socket_status status;
+
+ /* RDMA related */
+ struct {
+ struct rdma_cm_id *cm_id;
+ } rdma;
+
+ /* IB verbs related */
+ struct {
+ struct ib_pd *pd;
+ struct ib_cq *send_cq;
+ struct ib_cq *recv_cq;
+
+ /*
+ * shortcuts for rdma.cm_id->{qp,device};
+ */
+ struct ib_qp *qp;
+ struct ib_device *dev;
+ } ib;
+
+ struct smbdirect_socket_parameters parameters;
+
+ /*
+ * The state for posted send buffers
+ */
+ struct {
+ /*
+ * Memory pools for preallocating
+ * smbdirect_send_io buffers
+ */
+ struct {
+ struct kmem_cache *cache;
+ mempool_t *pool;
+ } mem;
+ } send_io;
+
+ /*
+ * The state for posted receive buffers
+ */
+ struct {
+ /*
+ * The type of PDU we are expecting
+ */
+ enum {
+ SMBDIRECT_EXPECT_NEGOTIATE_REQ = 1,
+ SMBDIRECT_EXPECT_NEGOTIATE_REP = 2,
+ SMBDIRECT_EXPECT_DATA_TRANSFER = 3,
+ } expected;
+
+ /*
+ * Memory pools for preallocating
+ * smbdirect_recv_io buffers
+ */
+ struct {
+ struct kmem_cache *cache;
+ mempool_t *pool;
+ } mem;
+
+ /*
+ * The list of free smbdirect_recv_io
+ * structures
+ */
+ struct {
+ struct list_head list;
+ spinlock_t lock;
+ } free;
+
+ /*
+ * The list of arrived non-empty smbdirect_recv_io
+ * structures
+ *
+ * This represents the reassembly queue.
+ */
+ struct {
+ struct list_head list;
+ spinlock_t lock;
+ wait_queue_head_t wait_queue;
+ /* total data length of reassembly queue */
+ int data_length;
+ int queue_length;
+ /* the offset to first buffer in reassembly queue */
+ int first_entry_offset;
+ /*
+ * Indicate if we have received a full packet on the
+ * connection This is used to identify the first SMBD
+ * packet of a assembled payload (SMB packet) in
+ * reassembly queue so we can return a RFC1002 length to
+ * upper layer to indicate the length of the SMB packet
+ * received
+ */
+ bool full_packet_received;
+ } reassembly;
+ } recv_io;
+};
+
+struct smbdirect_send_io {
+ struct smbdirect_socket *socket;
+ struct ib_cqe cqe;
+
+ /*
+ * The SGE entries for this work request
+ *
+ * The first points to the packet header
+ */
+#define SMBDIRECT_SEND_IO_MAX_SGE 6
+ size_t num_sge;
+ struct ib_sge sge[SMBDIRECT_SEND_IO_MAX_SGE];
+
+ /*
+ * Link to the list of sibling smbdirect_send_io
+ * messages.
+ */
+ struct list_head sibling_list;
+ struct ib_send_wr wr;
+
+ /* SMBD packet header follows this structure */
+ u8 packet[];
+};
+
+struct smbdirect_recv_io {
+ struct smbdirect_socket *socket;
+ struct ib_cqe cqe;
+
+ /*
+ * For now we only use a single SGE
+ * as we have just one large buffer
+ * per posted recv.
+ */
+#define SMBDIRECT_RECV_IO_MAX_SGE 1
+ struct ib_sge sge;
+
+ /* Link to free or reassembly list */
+ struct list_head list;
+
+ /* Indicate if this is the 1st packet of a payload */
+ bool first_segment;
+
+ /* SMBD packet header and payload follows this structure */
+ u8 packet[];
+};
+
+#endif /* __FS_SMB_COMMON_SMBDIRECT_SMBDIRECT_SOCKET_H__ */
diff --git a/fs/smb/common/smbfsctl.h b/fs/smb/common/smbfsctl.h
index 4b379e84c46b..3253a18ecb5c 100644
--- a/fs/smb/common/smbfsctl.h
+++ b/fs/smb/common/smbfsctl.h
@@ -159,6 +159,9 @@
#define IO_REPARSE_TAG_LX_CHR 0x80000025
#define IO_REPARSE_TAG_LX_BLK 0x80000026
+/* If Name Surrogate Bit is set, the file or directory represents another named entity in the system. */
+#define IS_REPARSE_TAG_NAME_SURROGATE(tag) (!!((tag) & 0x20000000))
+
/* fsctl flags */
/* If Flags is set to this value, the request is an FSCTL not ioctl request */
#define SMB2_0_IOCTL_IS_FSCTL 0x00000001
generated by cgit v1.2.3 (git 2.39.0) at 2025-08-25 11:37:43 +0300