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/linux/Documentation/filesystems/smb/
H A Dsmbdirect.rst4 SMB Direct - SMB3 over RDMA
7 This document describes how to set up the Linux SMB client and server to
12 The Linux SMB kernel client supports SMB Direct, which is a transport
16 SMB Direct on the Linux SMB client can be tested against KSMBD - a
17 kernel-space SMB server.
25 - Install a kernel with SMB Direct support. The first kernel release to
26 support SMB Direct on both the client and server side is 5.15. Therefore,
29 - Install cifs-utils, which provides the `mount.cifs` command to mount SMB
54 - Enable SMB Direct support for both the server and the client in the kernel
63 [*] Support for SMB Direct protocol
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H A Dcifsroot.rst4 Mounting root file system via SMB (cifs.ko)
12 support over the SMB protocol via cifs.ko.
16 network by utilizing SMB or CIFS protocol.
39 settings in Samba smb.conf::
53 the root file system via SMB protocol.
59 Enables the kernel to mount the root file system via SMB that are
62 The default mount options are set in fs/smb/client/cifsroot.c.
68 Path to SMB share (rootfs).
76 Export root file system as a Samba share in smb.conf file::
93 Restart smb service::
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H A Dksmbd.rst27 for listening to SMB requests. Whenever new clients make a request, the Forker
30 processing of SMB requests(commands) from clients as well as allowing for new
32 to indicate connected clients. Depending on the SMB request types, each new
41 ownership of receiving/parsing of SMB commands. Each received command is worked
45 So, each SMB workitem is queued to the kworkers. This allows the benefit of load
54 allows sharing information parameters that are parsed from smb.conf to ksmbd in
84 SMB direct(RDMA) Supported.
134 2. Create /usr/local/etc/ksmbd/ksmbd.conf file, add SMB share in ksmbd.conf file.
141 3. Create user/password for SMB share.
146 $ sudo ksmbd.adduser -a <Enter USERNAME for SMB share access>
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/linux/fs/smb/server/
H A Dsmb_common.c37 "\2SMB 2.1",
43 "\2SMB 2.???",
52 "\2SMB 2.1",
58 "\2SMB 3.0",
64 "\2SMB 3.02",
70 "\2SMB 3.1.1",
108 ksmbd_debug(SMB, "selected %s dialect idx = %d\n", in ksmbd_lookup_protocol_idx()
118 ksmbd_debug(SMB, "selected %s dialect idx = %d\n", in ksmbd_lookup_protocol_idx()
129 * @work: smb work
131 * check for valid smb signature and packet direction(request/response)
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H A Dsmb2misc.c17 * Make sure that this really is an SMB, that it is a response. in check_smb2_hdr()
26 * in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests.
187 ksmbd_debug(SMB, "no length check for command\n"); in smb2_get_data_area_len()
192 ksmbd_debug(SMB, "offset %d too large\n", *off); in smb2_get_data_area_len()
195 ksmbd_debug(SMB, "Request is larger than maximum stream protocol length(%u): %llu\n", in smb2_get_data_area_len()
204 * Calculate the size of the SMB message based on the fixed header
211 unsigned int offset; /* the offset from the beginning of SMB to data area */ in smb2_calc_size()
238 ksmbd_debug(SMB, "SMB2 data length %u offset %u\n", data_length, in smb2_calc_size()
249 ksmbd_debug(SMB, in smb2_calc_size()
259 ksmbd_debug(SMB, "SMB2 len %u\n", *len); in smb2_calc_size()
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H A Dsmb2pdu.c58 * check_session_id() - check for valid session id in smb header
60 * @id: session id from smb header
87 * @work: smb work
101 ksmbd_debug(SMB, "skip to check tree connect request\n"); in smb2_get_ksmbd_tcon()
106 ksmbd_debug(SMB, "NO tree connected\n"); in smb2_get_ksmbd_tcon()
139 * smb2_set_err_rsp() - set error response code on smb response
140 * @work: smb work containing response buffer
169 * @work: smb work containing smb header
193 * @work: smb work containing smb response buffer
213 * get_smb2_cmd_val() - get smb command code from smb header
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H A DKconfig51 bool "Support for SMB Direct protocol"
57 Enables SMB Direct support for SMB 3.0, 3.02 and 3.1.1.
59 SMB Direct allows transferring SMB packets over RDMA. If unsure,
H A Dksmbd_work.h34 /* Pointer to received SMB header */
66 /* response smb header size */
96 * @work: smb work containing response buffer
105 * @work: smb work containing response buffer
114 * @work: smb work containing response buffer
H A Dvfs.c167 * ksmbd_vfs_create() - vfs helper for smb create file
205 * ksmbd_vfs_mkdir() - vfs helper for smb create directory
312 * check_lock_range() - vfs helper for smb byte range file locking
356 * ksmbd_vfs_read() - vfs helper for smb file read
357 * @work: smb work
400 pr_err("smb read failed, err = %zd\n", nbytes); in ksmbd_vfs_read()
475 * ksmbd_vfs_write() - vfs helper for smb file write
529 ksmbd_debug(VFS, "smb write failed, err = %d\n", err); in ksmbd_vfs_write()
548 * ksmbd_vfs_getattr() - vfs helper for smb getattr
565 * ksmbd_vfs_fsync() - vfs helper for smb fsync
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H A Dserver.c88 * @work: smb work containing server thread information
134 ksmbd_debug(SMB, "*** not implemented yet cmd = %x\n", command); in __process_request()
257 * handle_ksmbd_work() - process pending smb work requests
258 * @wk: smb work containing request command buffer
260 * called by kworker threads to processing remaining smb work requests
277 * queue_ksmbd_work() - queue a smb request to worker thread queue
278 * for processing smb command and sending response
465 static const char * const debug_type_strings[] = {"smb", "auth", "vfs",
622 MODULE_DESCRIPTION("Linux kernel CIFS/SMB SERVER");
/linux/Documentation/i2c/busses/
H A Di2c-ali15x3.rst42 This is the driver for the SMB Host controller on Acer Labs Inc. (ALI)
89 then you must enable ACPI, the PMU, SMB, or something similar
94 The SMB controller is part of the M7101 device, which is an ACPI-compliant
97 The whole M7101 device has to be enabled for the SMB to work. You can't
98 just enable the SMB alone. The SMB and the ACPI have separate I/O spaces.
99 We make sure that the SMB is enabled. We leave the ACPI alone.
104 This driver controls the SMB Host only. The SMB Slave
112 This driver requests the I/O space for only the SMB
H A Di2c-ali1535.rst21 This is the driver for the SMB Host controller on Acer Labs Inc. (ALI)
33 The SMB controller is part of the M7101 device, which is an ACPI-compliant
36 The whole M7101 device has to be enabled for the SMB to work. You can't
37 just enable the SMB alone. The SMB and the ACPI have separate I/O spaces.
38 We make sure that the SMB is enabled. We leave the ACPI alone.
44 This driver controls the SMB Host only. This driver does not use
/linux/fs/smb/client/
H A DKconfig29 protocol, Server Message Block (SMB ie SMB1), the native file sharing
60 Enabling this option will allow more detailed statistics on SMB
100 namespace prefix to SMB/CIFS EAs. EAs are stored on Windows
183 bool "SMB Direct support"
186 Enables SMB Direct support for SMB 3.0, 3.02 and 3.1.1.
187 SMB Direct allows transferring SMB packets over RDMA. If unsure,
199 bool "SMB root file system (Experimental)"
202 Enables root file system support over SMB protocol.
207 bool "SMB message compression (Experimental)"
211 Enables over-the-wire message compression for SMB 3.1.1
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H A Dcifssmb.c7 * Contains the routines for constructing the SMB PDUs themselves
11 /* SMB/CIFS PDU handling routines here - except for leftovers in connect.c */
69 /* reconnect the socket, tcon, and smb session if needed */
79 * tcp and smb session status done differently for those three - in the in cifs_reconnect_tcon()
139 * reconnect the same SMB session in cifs_reconnect_tcon()
222 /* Allocate and return pointer to an SMB request buffer, and set basic
223 SMB information in the SMB header. If the return code is zero, this
287 /* potential retries of smb operations it turns out we can determine */ in __smb_init()
339 /* check for parm and data offset going beyond end of smb */ in validate_t2()
349 * less than negotiated smb buffer in validate_t2()
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H A Dmisc.c31 in a similar way to the mid which is useful to track each sent smb,
318 check_smb_hdr(struct smb_hdr *smb) in check_smb_hdr() argument
320 /* does it have the right SMB "signature" ? */ in check_smb_hdr()
321 if (*(__le32 *) smb->Protocol != cpu_to_le32(0x424d53ff)) { in check_smb_hdr()
323 *(unsigned int *)smb->Protocol); in check_smb_hdr()
328 if (smb->Flags & SMBFLG_RESPONSE) in check_smb_hdr()
332 if (smb->Command == SMB_COM_LOCKING_ANDX) in check_smb_hdr()
340 if (smb->Command == SMB_COM_TRANSACTION2 && smb->Status.CifsError != 0) in check_smb_hdr()
344 get_mid(smb)); in check_smb_hdr()
351 struct smb_hdr *smb = (struct smb_hdr *)buf; in checkSMB() local
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H A Dnetmisc.c811 struct smb_hdr *smb = (struct smb_hdr *)buf; in map_smb_to_linux_error() local
813 int rc = -EIO; /* if transport error smb error may not be set */ in map_smb_to_linux_error()
819 /* old style smb error codes */ in map_smb_to_linux_error()
820 if (smb->Status.CifsError == 0) in map_smb_to_linux_error()
823 if (smb->Flags2 & SMBFLG2_ERR_STATUS) { in map_smb_to_linux_error()
824 /* translate the newer STATUS codes to old style SMB errors in map_smb_to_linux_error()
826 __u32 err = le32_to_cpu(smb->Status.CifsError); in map_smb_to_linux_error()
833 smberrclass = smb->Status.DosError.ErrorClass; in map_smb_to_linux_error()
834 smberrcode = le16_to_cpu(smb->Status.DosError.Error); in map_smb_to_linux_error()
839 /* DOS class smb error codes - map DOS */ in map_smb_to_linux_error()
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H A Dcifspdu.h20 /* SMB command codes:
22 * (ie which include no useful data other than the SMB error code itself).
66 /* SMB Transact (Named Pipe) subcommand codes */
102 * Starting value for maximum SMB size negotiation
112 * Size of the crypto key returned on the negotiate SMB in bytes
137 * Flags on SMB open
154 * SMB flag definitions
156 #define SMBFLG_EXTD_LOCK 0x01 /* server supports lock-read write-unlock smb */
167 * SMB flag2 definitions
202 /* (for non-local files over SMB it */
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H A Dcifstransport.c103 /* check if SMB session is bad because we are setting it up */ in allocate_mid()
151 * Send an SMB Request. No response info (other than return code)
199 cifs_server_dbg(VFS, "SMB signature verification returned error = %d\n", in cifs_check_receive()
283 cifs_dbg(VFS, "Null smb session\n"); in SendReceive()
315 of smb data */ in SendReceive()
424 cifs_dbg(VFS, "Null smb session\n"); in SendReceiveBlockingLock()
458 of smb data */ in SendReceiveBlockingLock()
506 /* POSIX lock. We send a NT_CANCEL SMB to cause the in SendReceiveBlockingLock()
/linux/Documentation/ABI/testing/
H A Dsysfs-bus-coresight-devices-ultra_smb5 Description: (RW) Add/remove a SMB device from a trace path. There can be
6 multiple sources for a single SMB device.
12 Description: (RO) Shows the buffer size of each UltraSoc SMB device.
18 Description: (RO) Shows the value of UltraSoc SMB status register.
25 Description: (RO) Shows the value of UltraSoc SMB Read Pointer register.
31 Description: (RO) Shows the value of UltraSoc SMB Write Pointer register.
/linux/drivers/i2c/busses/
H A Di2c-ali1535.c11 This is the driver for the SMB Host controller on
25 The SMB controller is part of the 7101 device, which is an
28 The whole 7101 device has to be enabled for the SMB to work.
29 You can't just enable the SMB alone.
30 The SMB and the ACPI have separate I/O spaces.
31 We make sure that the SMB is enabled. We leave the ACPI alone.
33 This driver controls the SMB Host only.
118 #define ALI1535_SMBIO_EN 0x04 /* SMB I/O Space enable */
134 - SMB I/O address is initialized in ali1535_setup()
177 dev_err(&dev->dev, "SMB device not enabled - upgrade BIOS?\n"); in ali1535_setup()
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H A Di2c-ali15x3.c10 This is the driver for the SMB Host controller on
33 The SMB controller is part of the 7101 device, which is an
36 The whole 7101 device has to be enabled for the SMB to work.
37 You can't just enable the SMB alone.
38 The SMB and the ACPI have separate I/O spaces.
39 We make sure that the SMB is enabled. We leave the ACPI alone.
41 This driver controls the SMB Host only.
42 The SMB Target controller on the M15X3 is not enabled.
127 - SMB I/O address is initialized in ali15x3_setup()
192 /* Is SMB Host controller enabled? */ in ali15x3_setup()
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/linux/drivers/net/ethernet/atheros/atlx/
H A Datl1.c1091 /* init SMB */ in atl1_setup_ring_resources()
1092 adapter->smb.dma = adapter->cmb.dma + sizeof(struct coals_msg_block); in atl1_setup_ring_resources()
1093 offset = (adapter->smb.dma & 0x7) ? (8 - (adapter->smb.dma & 0x7)) : 0; in atl1_setup_ring_resources()
1094 adapter->smb.dma += offset; in atl1_setup_ring_resources()
1095 adapter->smb.smb = (struct stats_msg_block *) in atl1_setup_ring_resources()
1237 adapter->smb.dma = 0; in atl1_free_ring_resources()
1238 adapter->smb.smb = NULL; in atl1_free_ring_resources()
1482 iowrite32((u32) (adapter->smb.dma & 0x00000000ffffffffULL), in atl1_configure()
1596 /* config CMB / SMB */ in atl1_configure()
1606 /* --- enable CMB / SMB */ in atl1_configure()
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/linux/Documentation/admin-guide/cifs/
H A Dauthors.rst11 Andrew Tridgell (Samba team) for his early suggestions about SMB/CIFS VFS
18 Dave Boutcher of IBM Rochester (author of the OS/400 smb/cifs filesystem client)
19 for proving years ago that very good smb/cifs clients could be done on Unix-like
55 - Long Li (some great work on RDMA, SMB Direct)
H A Dusage.rst11 supersedes the 1992 X/Open SMB Standard) as well as to perform best practice
48 the modules directory e.g. /lib/modules/6.3.0-060300-generic/kernel/fs/smb/client/cifs.ko).
71 on kernel/fs/smb/client/cifs.ko the list of configuration changes that can be made
152 to your smb.conf file on the server. Note that the following smb.conf settings
174 Some administrators may want to change Samba's smb.conf ``map archive`` and
182 (``man smb.conf``) on the Samba server system. Note that the cifs vfs,
183 unlike the smbfs vfs, does not read the smb.conf on the client system
270 illegal Windows/NTFS/SMB characters to a remap range (this mount parameter
273 When POSIX Extensions for SMB 3.1.1 are negotiated, remapping is automatically
293 Set the SMB/CIFS workgroup name prepended to the
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/linux/fs/smb/
H A DKconfig5 source "fs/smb/client/Kconfig"
6 source "fs/smb/server/Kconfig"

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