Commit 07d3b2e4 authored by Ronnie Sahlberg's avatar Ronnie Sahlberg Committed by Steve French
Browse files

cifs: create a helper function for compound query_info 



and convert statfs to use it.

Signed-off-by: default avatarRonnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: default avatarSteve French <stfrench@microsoft.com>
parent 97aa495a

fs/cifs/smb2ops.c

+56 −26
Original line number Diff line number Diff line
@@ -960,7 +960,7 @@ smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon, 
	rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);

	if (rc)

		goto sea_exit;

	smb2_set_next_command(ses->server, &rqst[0]);

	smb2_set_next_command(ses->server, &rqst[0], 0);





	/* Set Info */
@@ -987,7 +987,7 @@ smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon, 
				COMPOUND_FID, current->tgid,

				FILE_FULL_EA_INFORMATION,

				SMB2_O_INFO_FILE, 0, data, size);

	smb2_set_next_command(server, &rqst[1]);

	smb2_set_next_command(server, &rqst[1], 0);

	smb2_set_related(&rqst[1]);
@@ -1837,25 +1837,28 @@ smb2_set_next_command(struct TCP_Server_Info *server, struct smb_rqst *rqst, 
	shdr->NextCommand = cpu_to_le32(len);

}



/*

 * Passes the query info response back to the caller on success.

 * Caller need to free this with free_rsp_buf().

 */

static int

smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,

	     struct kstatfs *buf)

smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,

			 __le16 *utf16_path, u32 desired_access,

			 u32 class, u32 type, u32 output_len,

			 struct kvec *rsp, int *buftype)

{

	struct smb2_query_info_rsp *rsp;

	struct smb2_fs_full_size_info *info = NULL;

	struct cifs_ses *ses = tcon->ses;

	struct TCP_Server_Info *server = ses->server;

	int flags = 0;

	struct smb_rqst rqst[3];

	int resp_buftype[3];

	struct kvec rsp_iov[3];

	struct kvec open_iov[SMB2_CREATE_IOV_SIZE];

	struct kvec qi_iov[1];

	struct kvec close_iov[1];

	struct cifs_ses *ses = tcon->ses;

	struct TCP_Server_Info *server = ses->server;

	__le16 srch_path = 0; /* Null - open root of share */

	u8 oplock = SMB2_OPLOCK_LEVEL_NONE;

	struct cifs_open_parms oparms;

	struct cifs_fid fid;

	int flags = 0;

	int rc;



	if (smb3_encryption_required(tcon))
@@ -1870,15 +1873,15 @@ smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon, 
	rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;



	oparms.tcon = tcon;

	oparms.desired_access = FILE_READ_ATTRIBUTES;

	oparms.desired_access = desired_access;

	oparms.disposition = FILE_OPEN;

	oparms.create_options = 0;

	oparms.fid = &fid;

	oparms.reconnect = false;



	rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, &srch_path);

	rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);

	if (rc)

		goto qfs_exit;

		goto qic_exit;

	smb2_set_next_command(server, &rqst[0], 0);



	memset(&qi_iov, 0, sizeof(qi_iov));
@@ -1886,12 +1889,11 @@ smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon, 
	rqst[1].rq_nvec = 1;



	rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID, COMPOUND_FID,

				  FS_FULL_SIZE_INFORMATION,

				  SMB2_O_INFO_FILESYSTEM, 0,

				  sizeof(struct smb2_fs_full_size_info), 0,

				  class, type, 0,

				  output_len, 0,

				  NULL);

	if (rc)

		goto qfs_exit;

		goto qic_exit;

	smb2_set_next_command(server, &rqst[1], 0);

	smb2_set_related(&rqst[1]);
@@ -1901,32 +1903,60 @@ smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon, 


	rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID);

	if (rc)

		goto qfs_exit;

		goto qic_exit;

	smb2_set_related(&rqst[2]);



	rc = compound_send_recv(xid, ses, flags, 3, rqst,

				resp_buftype, rsp_iov);

	if (rc)

		goto qic_exit;



	*rsp = rsp_iov[1];

	*buftype = resp_buftype[1];



 qic_exit:

	SMB2_open_free(&rqst[0]);

	SMB2_query_info_free(&rqst[1]);

	SMB2_close_free(&rqst[2]);

	free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);

	free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);

	return rc;

}



static int

smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,

	     struct kstatfs *buf)

{

	struct smb2_query_info_rsp *rsp;

	struct smb2_fs_full_size_info *info = NULL;

	__le16 utf16_path = 0; /* Null - open root of share */

	struct kvec rsp_iov = {NULL, 0};

	int buftype = CIFS_NO_BUFFER;

	int rc;





	rc = smb2_query_info_compound(xid, tcon, &utf16_path,

				      FILE_READ_ATTRIBUTES,

				      FS_FULL_SIZE_INFORMATION,

				      SMB2_O_INFO_FILESYSTEM,

				      sizeof(struct smb2_fs_full_size_info),

				      &rsp_iov, &buftype);

	if (rc)

		goto qfs_exit;



	rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;

	rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;

	buf->f_type = SMB2_MAGIC_NUMBER;

	info = (struct smb2_fs_full_size_info *)(

		le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);

	rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),

			       le32_to_cpu(rsp->OutputBufferLength),

			       &rsp_iov[1],

			       &rsp_iov,

			       sizeof(struct smb2_fs_full_size_info));

	if (!rc)

		smb2_copy_fs_info_to_kstatfs(info, buf);



qfs_exit:

	SMB2_open_free(&rqst[0]);

	SMB2_query_info_free(&rqst[1]);

	SMB2_close_free(&rqst[2]);

	free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);

	free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);

	free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);

	free_rsp_buf(buftype, rsp_iov.iov_base);

	return rc;

}

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