CIFS: Add statfs support for SMB2 (6fc05c25) · Commits · git / linux-net

fs/cifs/smb2glob.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -23,6 +23,8 @@
		#ifndef _SMB2_GLOB_H
		#define _SMB2_GLOB_H

		#define SMB2_MAGIC_NUMBER 0xFE534D42

		/*
		*****************************************************************
		* Constants go here

fs/cifs/smb2ops.c

+22 −0

Original line number	Diff line number	Diff line
		@@ -18,12 +18,14 @@
		*/

		#include <linux/pagemap.h>
		#include <linux/vfs.h>
		#include "cifsglob.h"
		#include "smb2pdu.h"
		#include "smb2proto.h"
		#include "cifsproto.h"
		#include "cifs_debug.h"
		#include "smb2status.h"
		#include "smb2glob.h"

		static int
		change_conf(struct TCP_Server_Info *server)
		@@ -522,6 +524,25 @@ smb2_oplock_response(struct cifs_tcon tcon, struct cifs_fid fid,
		cinode->clientCanCacheRead ? 1 : 0);
		}

		static int
		smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
		struct kstatfs *buf)
		{
		int rc;
		u64 persistent_fid, volatile_fid;
		__le16 srch_path = 0; /* Null - open root of share */
		u8 oplock = SMB2_OPLOCK_LEVEL_NONE;

		rc = SMB2_open(xid, tcon, &srch_path, &persistent_fid, &volatile_fid,
		FILE_READ_ATTRIBUTES, FILE_OPEN, 0, 0, &oplock, NULL);
		if (rc)
		return rc;
		buf->f_type = SMB2_MAGIC_NUMBER;
		rc = SMB2_QFS_info(xid, tcon, persistent_fid, volatile_fid, buf);
		SMB2_close(xid, tcon, persistent_fid, volatile_fid);
		return rc;
		}

		struct smb_version_operations smb21_operations = {
		.setup_request = smb2_setup_request,
		.setup_async_request = smb2_setup_async_request,
		@@ -578,6 +599,7 @@ struct smb_version_operations smb21_operations = {
		.calc_smb_size = smb2_calc_size,
		.is_status_pending = smb2_is_status_pending,
		.oplock_response = smb2_oplock_response,
		.queryfs = smb2_queryfs,
		};

		struct smb_version_values smb21_values = {

fs/cifs/smb2pdu.c

+81 −0

Original line number	Diff line number	Diff line
		@@ -1971,3 +1971,84 @@ SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,

		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;

		cFYI(1, "Query FSInfo level %d", 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 qinf_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);

		qinf_exit:
		free_rsp_buf(resp_buftype, iov.iov_base);
		return rc;
		}

fs/cifs/smb2pdu.h

+19 −0

Original line number	Diff line number	Diff line
		@@ -630,6 +630,25 @@ struct smb2_oplock_break {
		* BB consider moving to a different header
		*/

		/* File System Information Classes */
		#define FS_VOLUME_INFORMATION 1 /* Query */
		#define FS_LABEL_INFORMATION 2 /* Set */
		#define FS_SIZE_INFORMATION 3 /* Query */
		#define FS_DEVICE_INFORMATION 4 /* Query */
		#define FS_ATTRIBUTE_INFORMATION 5 /* Query */
		#define FS_CONTROL_INFORMATION 6 /* Query, Set */
		#define FS_FULL_SIZE_INFORMATION 7 /* Query */
		#define FS_OBJECT_ID_INFORMATION 8 /* Query, Set */
		#define FS_DRIVER_PATH_INFORMATION 9 /* Query */

		struct smb2_fs_full_size_info {
		__le64 TotalAllocationUnits;
		__le64 CallerAvailableAllocationUnits;
		__le64 ActualAvailableAllocationUnits;
		__le32 SectorsPerAllocationUnit;
		__le32 BytesPerSector;
		} __packed;

		/* partial list of QUERY INFO levels */
		#define FILE_DIRECTORY_INFORMATION 1
		#define FILE_FULL_DIRECTORY_INFORMATION 2

fs/cifs/smb2proto.h

+3 −0

Original line number	Diff line number	Diff line
		@@ -138,5 +138,8 @@ extern int SMB2_set_info(const unsigned int xid, struct cifs_tcon *tcon,
		extern int SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,
		const u64 persistent_fid, const u64 volatile_fid,
		const __u8 oplock_level);
		extern int SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
		u64 persistent_file_id, u64 volatile_file_id,
		struct kstatfs *FSData);

		#endif /* _SMB2PROTO_H */