Commit 69dda305 authored by Aurelien Aptel's avatar Aurelien Aptel Committed by Steve French
Browse files

cifs: add SMB2_open() arg to return POSIX data 



allows SMB2_open() callers to pass down a POSIX data buffer that will
trigger requesting POSIX create context and parsing the response into
the provided buffer.

Signed-off-by: default avatarAurelien Aptel <aaptel@suse.com>
Signed-off-by: default avatarSteve French <stfrench@microsoft.com>
Reviewed-by: default avatarPaulo Alcantara (SUSE) <pc@cjr.nz>
parent 3d519bd1

fs/cifs/link.c

+2 −2
Original line number Diff line number Diff line
@@ -416,7 +416,7 @@ smb3_query_mf_symlink(unsigned int xid, struct cifs_tcon *tcon, 
	}



	rc = SMB2_open(xid, &oparms, utf16_path, &oplock, pfile_info, NULL,

		       NULL);

		       NULL, NULL);

	if (rc)

		goto qmf_out_open_fail;
@@ -470,7 +470,7 @@ smb3_create_mf_symlink(unsigned int xid, struct cifs_tcon *tcon, 
	oparms.reconnect = false;



	rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,

		       NULL);

		       NULL, NULL);

	if (rc) {

		kfree(utf16_path);

		return rc;

fs/cifs/smb2file.c

+1 −1
Original line number Diff line number Diff line
@@ -62,7 +62,7 @@ smb2_open_file(const unsigned int xid, struct cifs_open_parms *oparms, 
	smb2_oplock = SMB2_OPLOCK_LEVEL_BATCH;



	rc = SMB2_open(xid, oparms, smb2_path, &smb2_oplock, smb2_data, NULL,

		       NULL);

		       NULL, NULL);

	if (rc)

		goto out;

fs/cifs/smb2ops.c

+15 −8
Original line number Diff line number Diff line
@@ -794,7 +794,8 @@ int open_shroot(unsigned int xid, struct cifs_tcon *tcon, 
		tcon->crfid.has_lease = true;

		smb2_parse_contexts(server, o_rsp,

				&oparms.fid->epoch,

				oparms.fid->lease_key, &oplock, NULL);

				    oparms.fid->lease_key, &oplock,

				    NULL, NULL);

	} else

		goto oshr_exit;
@@ -838,7 +839,7 @@ smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon, 


	if (no_cached_open)

		rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,

			       NULL);

			       NULL, NULL);

	else

		rc = open_shroot(xid, tcon, cifs_sb, &fid);
@@ -878,7 +879,8 @@ smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon, 
	oparms.fid = &fid;

	oparms.reconnect = false;



	rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL);

	rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,

		       NULL, NULL);

	if (rc)

		return;
@@ -913,7 +915,8 @@ smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon, 
	oparms.fid = &fid;

	oparms.reconnect = false;



	rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);

	rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,

		       NULL);

	if (rc) {

		kfree(utf16_path);

		return rc;
@@ -2122,7 +2125,8 @@ smb3_notify(const unsigned int xid, struct file *pfile, 
	oparms.fid = &fid;

	oparms.reconnect = false;



	rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);

	rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,

		       NULL);

	if (rc)

		goto notify_exit;
@@ -2543,7 +2547,8 @@ smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon, 
	oparms.fid = &fid;

	oparms.reconnect = false;



	rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL);

	rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,

		       NULL, NULL);

	if (rc)

		return rc;
@@ -3028,7 +3033,8 @@ get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb, 
	oparms.fid = &fid;

	oparms.reconnect = false;



	rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);

	rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,

		       NULL);

	kfree(utf16_path);

	if (!rc) {

		rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
@@ -3086,7 +3092,8 @@ set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen, 
	oparms.fid = &fid;

	oparms.reconnect = false;



	rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);

	rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,

		       NULL, NULL);

	kfree(utf16_path);

	if (!rc) {

		rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,

fs/cifs/smb2pdu.c

+39 −16
Original line number Diff line number Diff line
@@ -1951,25 +1951,46 @@ parse_query_id_ctxt(struct create_context *cc, struct smb2_file_all_info *buf) 
}



static void

parse_posix_ctxt(struct create_context *cc, struct smb2_file_all_info *info)

parse_posix_ctxt(struct create_context *cc, struct smb2_file_all_info *info,

		 struct create_posix_rsp *posix)

{

	/* struct create_posix_rsp *posix = (struct create_posix_rsp *)cc; */

	int sid_len;

	u8 *beg = (u8 *)cc + le16_to_cpu(cc->DataOffset);

	u8 *end = beg + le32_to_cpu(cc->DataLength);

	u8 *sid;



	/*

	 * TODO: Need to add parsing for the context and return. Can

	 * smb2_file_all_info hold POSIX data? Need to change the

	 * passed type from SMB2_open.

	 */

	printk_once(KERN_WARNING

		    "SMB3 3.11 POSIX response context not completed yet\n");

	memset(posix, 0, sizeof(*posix));



	posix->nlink = le32_to_cpu(*(__le32 *)(beg + 0));

	posix->reparse_tag = le32_to_cpu(*(__le32 *)(beg + 4));

	posix->mode = le32_to_cpu(*(__le32 *)(beg + 8));



	sid = beg + 12;

	sid_len = posix_info_sid_size(sid, end);

	if (sid_len < 0) {

		cifs_dbg(VFS, "bad owner sid in posix create response\n");

		return;

	}

	memcpy(&posix->owner, sid, sid_len);



	sid = sid + sid_len;

	sid_len = posix_info_sid_size(sid, end);

	if (sid_len < 0) {

		cifs_dbg(VFS, "bad group sid in posix create response\n");

		return;

	}

	memcpy(&posix->group, sid, sid_len);



	cifs_dbg(FYI, "nlink=%d mode=%o reparse_tag=%x\n",

		 posix->nlink, posix->mode, posix->reparse_tag);

}



void

smb2_parse_contexts(struct TCP_Server_Info *server,

		    struct smb2_create_rsp *rsp,

		    unsigned int *epoch, char *lease_key, __u8 *oplock,

		       struct smb2_file_all_info *buf)

		    struct smb2_file_all_info *buf,

		    struct create_posix_rsp *posix)

{

	char *data_offset;

	struct create_context *cc;
@@ -1999,8 +2020,9 @@ smb2_parse_contexts(struct TCP_Server_Info *server, 
		    strncmp(name, SMB2_CREATE_QUERY_ON_DISK_ID, 4) == 0)

			parse_query_id_ctxt(cc, buf);

		else if ((le16_to_cpu(cc->NameLength) == 16)) {

			if (memcmp(name, smb3_create_tag_posix, 16) == 0)

				parse_posix_ctxt(cc, buf);

			if (posix &&

			    memcmp(name, smb3_create_tag_posix, 16) == 0)

				parse_posix_ctxt(cc, buf, posix);

		}

		/* else {

			cifs_dbg(FYI, "Context not matched with len %d\n",
@@ -2725,6 +2747,7 @@ SMB2_open_free(struct smb_rqst *rqst) 
int

SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,

	  __u8 *oplock, struct smb2_file_all_info *buf,

	  struct create_posix_rsp *posix,

	  struct kvec *err_iov, int *buftype)

{

	struct smb_rqst rqst;
@@ -2803,7 +2826,7 @@ SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path, 




	smb2_parse_contexts(server, rsp, &oparms->fid->epoch,

			    oparms->fid->lease_key, oplock, buf);

			    oparms->fid->lease_key, oplock, buf, posix);

creat_exit:

	SMB2_open_free(&rqst);

	free_rsp_buf(resp_buftype, rsp);
@@ -4302,7 +4325,7 @@ SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms, 
	return rc;

}



static int posix_info_sid_size(const void *beg, const void *end)

int posix_info_sid_size(const void *beg, const void *end)

{

	size_t subauth;

	int total;

fs/cifs/smb2pdu.h

+5 −7
Original line number Diff line number Diff line
@@ -1605,13 +1605,11 @@ extern char smb2_padding[7]; 


/* equivalent of the contents of SMB3.1.1 POSIX open context response */

struct create_posix_rsp {

	__le32 nlink;

	__le32 reparse_tag;

	__le32 mode;

	/*

	 * var sized owner SID

	 * var sized group SID

	 */

	u32 nlink;

	u32 reparse_tag;

	u32 mode;

	struct cifs_sid owner; /* var-sized on the wire */

	struct cifs_sid group; /* var-sized on the wire */

} __packed;



/*

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