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smb: client: cleanup smb2_query_reparse_point()
Use smb2_compound_op() with SMB2_OP_GET_REPARSE to get reparse point. Signed-off-by: Paulo Alcantara (SUSE) <pc@manguebit.com> Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Paulo Alcantara
Steve French
parent
514d793e27
commit
3ded18a9e9
@ -1053,3 +1053,36 @@ struct inode *smb2_get_reparse_inode(struct cifs_open_info_data *data,
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}
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return rc ? ERR_PTR(rc) : new;
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}
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int smb2_query_reparse_point(const unsigned int xid,
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struct cifs_tcon *tcon,
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struct cifs_sb_info *cifs_sb,
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const char *full_path,
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u32 *tag, struct kvec *rsp,
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int *rsp_buftype)
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{
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struct cifs_open_info_data data = {};
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struct cifsFileInfo *cfile;
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struct kvec in_iov = { .iov_base = &data, .iov_len = sizeof(data), };
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int rc;
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cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
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cifs_get_readable_path(tcon, full_path, &cfile);
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rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
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FILE_READ_ATTRIBUTES, FILE_OPEN,
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OPEN_REPARSE_POINT, ACL_NO_MODE, &in_iov,
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&(int){SMB2_OP_GET_REPARSE}, 1, cfile,
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NULL, NULL, NULL, NULL);
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if (rc)
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goto out;
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*tag = data.reparse.tag;
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*rsp = data.reparse.io.iov;
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*rsp_buftype = data.reparse.io.buftype;
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memset(&data.reparse.io.iov, 0, sizeof(data.reparse.io.iov));
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data.reparse.io.buftype = CIFS_NO_BUFFER;
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out:
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cifs_free_open_info(&data);
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return rc;
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}
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@ -2997,145 +2997,6 @@ static int smb2_parse_reparse_point(struct cifs_sb_info *cifs_sb,
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return parse_reparse_point(buf, plen, cifs_sb, true, data);
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}
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static int smb2_query_reparse_point(const unsigned int xid,
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struct cifs_tcon *tcon,
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struct cifs_sb_info *cifs_sb,
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const char *full_path,
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u32 *tag, struct kvec *rsp,
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int *rsp_buftype)
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{
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struct smb2_compound_vars *vars;
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int rc;
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__le16 *utf16_path = NULL;
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__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
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struct cifs_open_parms oparms;
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struct cifs_fid fid;
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struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
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int flags = CIFS_CP_CREATE_CLOSE_OP;
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struct smb_rqst *rqst;
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int resp_buftype[3];
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struct kvec *rsp_iov;
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struct smb2_ioctl_rsp *ioctl_rsp;
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struct reparse_data_buffer *reparse_buf;
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u32 off, count, len;
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cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
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if (smb3_encryption_required(tcon))
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flags |= CIFS_TRANSFORM_REQ;
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utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
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if (!utf16_path)
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return -ENOMEM;
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resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
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vars = kzalloc(sizeof(*vars), GFP_KERNEL);
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if (!vars) {
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rc = -ENOMEM;
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goto out_free_path;
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}
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rqst = vars->rqst;
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rsp_iov = vars->rsp_iov;
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/*
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* setup smb2open - TODO add optimization to call cifs_get_readable_path
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* to see if there is a handle already open that we can use
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*/
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rqst[0].rq_iov = vars->open_iov;
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rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
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oparms = (struct cifs_open_parms) {
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.tcon = tcon,
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.path = full_path,
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.desired_access = FILE_READ_ATTRIBUTES,
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.disposition = FILE_OPEN,
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.create_options = cifs_create_options(cifs_sb, OPEN_REPARSE_POINT),
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.fid = &fid,
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};
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rc = SMB2_open_init(tcon, server,
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&rqst[0], &oplock, &oparms, utf16_path);
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if (rc)
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goto query_rp_exit;
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smb2_set_next_command(tcon, &rqst[0]);
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/* IOCTL */
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rqst[1].rq_iov = vars->io_iov;
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rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
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rc = SMB2_ioctl_init(tcon, server,
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&rqst[1], COMPOUND_FID,
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COMPOUND_FID, FSCTL_GET_REPARSE_POINT, NULL, 0,
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CIFSMaxBufSize -
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MAX_SMB2_CREATE_RESPONSE_SIZE -
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MAX_SMB2_CLOSE_RESPONSE_SIZE);
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if (rc)
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goto query_rp_exit;
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smb2_set_next_command(tcon, &rqst[1]);
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smb2_set_related(&rqst[1]);
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/* Close */
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rqst[2].rq_iov = &vars->close_iov;
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rqst[2].rq_nvec = 1;
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rc = SMB2_close_init(tcon, server,
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&rqst[2], COMPOUND_FID, COMPOUND_FID, false);
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if (rc)
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goto query_rp_exit;
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smb2_set_related(&rqst[2]);
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rc = compound_send_recv(xid, tcon->ses, server,
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flags, 3, rqst,
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resp_buftype, rsp_iov);
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ioctl_rsp = rsp_iov[1].iov_base;
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/*
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* Open was successful and we got an ioctl response.
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*/
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if (rc == 0) {
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/* See MS-FSCC 2.3.23 */
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off = le32_to_cpu(ioctl_rsp->OutputOffset);
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count = le32_to_cpu(ioctl_rsp->OutputCount);
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if (check_add_overflow(off, count, &len) ||
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len > rsp_iov[1].iov_len) {
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cifs_tcon_dbg(VFS, "%s: invalid ioctl: off=%d count=%d\n",
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__func__, off, count);
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rc = -EIO;
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goto query_rp_exit;
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}
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reparse_buf = (void *)((u8 *)ioctl_rsp + off);
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len = sizeof(*reparse_buf);
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if (count < len ||
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count < le16_to_cpu(reparse_buf->ReparseDataLength) + len) {
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cifs_tcon_dbg(VFS, "%s: invalid ioctl: off=%d count=%d\n",
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__func__, off, count);
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rc = -EIO;
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goto query_rp_exit;
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}
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*tag = le32_to_cpu(reparse_buf->ReparseTag);
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*rsp = rsp_iov[1];
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*rsp_buftype = resp_buftype[1];
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resp_buftype[1] = CIFS_NO_BUFFER;
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}
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query_rp_exit:
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SMB2_open_free(&rqst[0]);
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SMB2_ioctl_free(&rqst[1]);
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SMB2_close_free(&rqst[2]);
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free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
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free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
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free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
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kfree(vars);
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out_free_path:
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kfree(utf16_path);
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return rc;
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}
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static struct cifs_ntsd *
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get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
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const struct cifs_fid *cifsfid, u32 *pacllen, u32 info)
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@ -62,6 +62,12 @@ struct inode *smb2_get_reparse_inode(struct cifs_open_info_data *data,
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struct cifs_tcon *tcon,
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const char *full_path,
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struct kvec *iov);
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int smb2_query_reparse_point(const unsigned int xid,
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struct cifs_tcon *tcon,
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struct cifs_sb_info *cifs_sb,
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const char *full_path,
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u32 *tag, struct kvec *rsp,
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int *rsp_buftype);
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int smb2_query_path_info(const unsigned int xid,
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struct cifs_tcon *tcon,
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struct cifs_sb_info *cifs_sb,
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