fs/smbsrv/smb_nt_transact_create.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
 * Copyright 2013 Nexenta Systems, Inc.  All rights reserved.
 */

/*
 * This command is used to create or open a file or directory, when EAs
 * or an SD must be applied to the file. The functionality is similar
 * to SmbNtCreateAndx with the option to supply extended attributes or
 * a security descriptor.
 *
 * Note: we don't decode the extended attributes because we don't
 * support them at this time.
 */

#include <smbsrv/smb_kproto.h>
#include <smbsrv/smb_fsops.h>

/*
 * smb_nt_transact_create
 *
 * This command is used to create or open a file or directory, when EAs
 * or an SD must be applied to the file. The request parameter block
 * encoding, data block encoding and output parameter block encoding are
 * described in CIFS section 4.2.2.
 *
 * The format of the command is SmbNtTransact but it is basically the same
 * as SmbNtCreateAndx with the option to supply extended attributes or a
 * security descriptor. For information not defined in CIFS section 4.2.2
 * see section 4.2.1 (NT_CREATE_ANDX).
 */
smb_sdrc_t
smb_pre_nt_transact_create(smb_request_t *sr, smb_xa_t *xa)
{
    struct open_param *op = &sr->arg.open;
    uint8_t SecurityFlags;
    uint32_t EaLength;
    uint32_t ImpersonationLevel;
    uint32_t NameLength;
    uint32_t sd_len;
    uint32_t status;
    smb_sd_t sd;
    int rc;

    bzero(op, sizeof (sr->arg.open));

    rc = smb_mbc_decodef(&xa->req_param_mb, "%lllqllllllllb",
        sr,
        &op->nt_flags,
        &op->rootdirfid,
        &op->desired_access,
        &op->dsize,
        &op->dattr,
        &op->share_access,
        &op->create_disposition,
        &op->create_options,
        &sd_len,
        &EaLength,
        &NameLength,
        &ImpersonationLevel,
        &SecurityFlags);

    if (rc == 0) {
        if (NameLength == 0) {
            op->fqi.fq_path.pn_path = "\\";
        } else if (NameLength >= MAXPATHLEN) {
            smbsr_error(sr, NT_STATUS_OBJECT_PATH_NOT_FOUND,
                ERRDOS, ERROR_PATH_NOT_FOUND);
            rc = -1;
        } else {
            rc = smb_mbc_decodef(&xa->req_param_mb, "%#u",
                sr, NameLength, &op->fqi.fq_path.pn_path);
        }
    }

    op->op_oplock_level = SMB_OPLOCK_NONE;
    if (op->nt_flags & NT_CREATE_FLAG_REQUEST_OPLOCK) {
        if (op->nt_flags & NT_CREATE_FLAG_REQUEST_OPBATCH)
            op->op_oplock_level = SMB_OPLOCK_BATCH;
        else
            op->op_oplock_level = SMB_OPLOCK_EXCLUSIVE;
    }

    if (sd_len) {
        status = smb_decode_sd(&xa->req_data_mb, &sd);
        if (status != NT_STATUS_SUCCESS) {
            smbsr_error(sr, status, 0, 0);
            return (SDRC_ERROR);
        }
        op->sd = kmem_alloc(sizeof (smb_sd_t), KM_SLEEP);
        *op->sd = sd;
    } else {
        op->sd = NULL;
    }

    DTRACE_SMB_2(op__NtTransactCreate__start, smb_request_t *, sr,
        struct open_param *, op);

    return ((rc == 0) ? SDRC_SUCCESS : SDRC_ERROR);
}

void
smb_post_nt_transact_create(smb_request_t *sr, smb_xa_t *xa)
{
    smb_sd_t *sd = sr->arg.open.sd;

    DTRACE_SMB_2(op__NtTransactCreate__done, smb_request_t *, sr,
        smb_xa_t *, xa);

    if (sd) {
        smb_sd_term(sd);
        kmem_free(sd, sizeof (smb_sd_t));
    }

    if (sr->arg.open.dir != NULL)
        smb_ofile_release(sr->arg.open.dir);
}

smb_sdrc_t
smb_nt_transact_create(smb_request_t *sr, smb_xa_t *xa)
{
    struct open_param *op = &sr->arg.open;
    uint8_t         DirFlag;
    smb_attr_t      attr;
    smb_ofile_t     *of;
    uint32_t        status;
    int         rc;

    if ((op->create_options & FILE_DELETE_ON_CLOSE) &&
        !(op->desired_access & DELETE)) {
        smbsr_error(sr, NT_STATUS_INVALID_PARAMETER,
            ERRDOS, ERRbadaccess);
        return (SDRC_ERROR);
    }

    if (op->create_disposition > FILE_MAXIMUM_DISPOSITION) {
        smbsr_error(sr, NT_STATUS_INVALID_PARAMETER,
            ERRDOS, ERRbadaccess);
        return (SDRC_ERROR);
    }

    if (op->dattr & FILE_FLAG_WRITE_THROUGH)
        op->create_options |= FILE_WRITE_THROUGH;

    if (op->dattr & FILE_FLAG_DELETE_ON_CLOSE)
        op->create_options |= FILE_DELETE_ON_CLOSE;

    if (op->dattr & FILE_FLAG_BACKUP_SEMANTICS)
        op->create_options |= FILE_OPEN_FOR_BACKUP_INTENT;

    if (op->create_options & FILE_OPEN_FOR_BACKUP_INTENT)
        sr->user_cr = smb_user_getprivcred(sr->uid_user);

    if (op->rootdirfid == 0) {
        op->fqi.fq_dnode = sr->tid_tree->t_snode;
    } else {
        op->dir = smb_ofile_lookup_by_fid(sr, (uint16_t)op->rootdirfid);
        if (op->dir == NULL) {
            smbsr_error(sr, NT_STATUS_INVALID_HANDLE,
                ERRDOS, ERRbadfid);
            return (SDRC_ERROR);
        }
        op->fqi.fq_dnode = op->dir->f_node;
    }

    op->op_oplock_levelII = B_TRUE;

    status = smb_common_open(sr);
    if (status != NT_STATUS_SUCCESS) {
        smbsr_status(sr, status, 0, 0);
        return (SDRC_ERROR);
    }

    /*
     * NB: after the above smb_common_open() success,
     * we have a handle allocated (sr->fid_ofile).
     * If we don't return success, we must close it.
     */
    of = sr->fid_ofile;

    switch (sr->tid_tree->t_res_type & STYPE_MASK) {
    case STYPE_DISKTREE:
    case STYPE_PRINTQ:
        if (op->create_options & FILE_DELETE_ON_CLOSE)
            smb_ofile_set_delete_on_close(of);

        DirFlag = smb_node_is_dir(of->f_node) ? 1 : 0;
        bzero(&attr, sizeof (attr));
        attr.sa_mask = SMB_AT_ALL;
        rc = smb_node_getattr(sr, of->f_node, of->f_cr, of, &attr);
        if (rc != 0) {
            smbsr_errno(sr, rc);
            goto errout;
        }

        rc = smb_mbc_encodef(&xa->rep_param_mb, "b.wllTTTTlqqwwb",
            op->op_oplock_level,
            sr->smb_fid,
            op->action_taken,
            0,  /* EaErrorOffset */
            &attr.sa_crtime,
            &attr.sa_vattr.va_atime,
            &attr.sa_vattr.va_mtime,
            &attr.sa_vattr.va_ctime,
            op->dattr & FILE_ATTRIBUTE_MASK,
            attr.sa_allocsz,
            attr.sa_vattr.va_size,
            op->ftype,
            op->devstate,
            DirFlag);
        break;

    case STYPE_IPC:
        bzero(&attr, sizeof (smb_attr_t));
        rc = smb_mbc_encodef(&xa->rep_param_mb, "b.wllTTTTlqqwwb",
            0,
            sr->smb_fid,
            op->action_taken,
            0,  /* EaErrorOffset */
            &attr.sa_crtime,
            &attr.sa_vattr.va_atime,
            &attr.sa_vattr.va_mtime,
            &attr.sa_vattr.va_ctime,
            op->dattr,
            0x1000LL,
            0LL,
            op->ftype,
            op->devstate,
            0);
        break;

    default:
        smbsr_error(sr, NT_STATUS_INVALID_DEVICE_REQUEST,
            ERRDOS, ERROR_INVALID_FUNCTION);
        goto errout;
    }
    return (SDRC_SUCCESS);

errout:
    smb_ofile_close(of, 0);
    return (SDRC_ERROR);
}