コード例 #1
0
/**
 * fsal_internal_proxy_create_fattr_bitmap :
 * Create the fattr4 bitmap related to the attributes managed by this implementation of the proxy
 *
 *
 * @param none
 *
 * @return the desired bitmap
 *
 */
void fsal_internal_proxy_create_fattr_bitmap(bitmap4 * pbitmap)
{
  uint32_t tmpattrlist[20];
  uint32_t attrlen = 0;

  pbitmap->bitmap4_len = 2;

  memset(pbitmap->bitmap4_val, 0, sizeof(uint32_t) * pbitmap->bitmap4_len);

  tmpattrlist[0] = FATTR4_TYPE;
  tmpattrlist[1] = FATTR4_CHANGE;
  tmpattrlist[2] = FATTR4_SIZE;
  tmpattrlist[3] = FATTR4_FSID;
  tmpattrlist[4] = FATTR4_FILEID;
  tmpattrlist[5] = FATTR4_MODE;
  tmpattrlist[6] = FATTR4_NUMLINKS;
  tmpattrlist[7] = FATTR4_OWNER;
  tmpattrlist[8] = FATTR4_OWNER_GROUP;
  tmpattrlist[9] = FATTR4_SPACE_USED;
  tmpattrlist[10] = FATTR4_TIME_ACCESS;
  tmpattrlist[11] = FATTR4_TIME_METADATA;
  tmpattrlist[12] = FATTR4_TIME_MODIFY;
  tmpattrlist[13] = FATTR4_RAWDEV;

  attrlen = 14;

  nfs4_list_to_bitmap4(pbitmap, attrlen, tmpattrlist);

}                               /* fsal_internal_proxy_create_fattr_bitmap */
コード例 #2
0
void fsal_interval_proxy_fsalattr2bitmap4(fsal_attrib_list_t * pfsalattr,
                                          bitmap4 * pbitmap)
{
  uint32_t tmpattrlist[100];
  uint32_t attrlen = 0;

  if(FSAL_TEST_MASK(pfsalattr->asked_attributes, FSAL_ATTR_SIZE))
    tmpattrlist[attrlen++] = FATTR4_SIZE;
  if(FSAL_TEST_MASK(pfsalattr->asked_attributes, FSAL_ATTR_MODE))
    tmpattrlist[attrlen++] = FATTR4_MODE;
  if(FSAL_TEST_MASK(pfsalattr->asked_attributes, FSAL_ATTR_OWNER))
    tmpattrlist[attrlen++] = FATTR4_OWNER;
  if(FSAL_TEST_MASK(pfsalattr->asked_attributes, FSAL_ATTR_GROUP))
    tmpattrlist[attrlen++] = FATTR4_OWNER_GROUP;
  if(FSAL_TEST_MASK(pfsalattr->asked_attributes, FSAL_ATTR_ATIME))
    tmpattrlist[attrlen++] = FATTR4_TIME_ACCESS_SET;
  if(FSAL_TEST_MASK(pfsalattr->asked_attributes, FSAL_ATTR_ATIME_SERVER))
    tmpattrlist[attrlen++] = FATTR4_TIME_ACCESS_SET;
  if(FSAL_TEST_MASK(pfsalattr->asked_attributes, FSAL_ATTR_MTIME))
    tmpattrlist[attrlen++] = FATTR4_TIME_MODIFY_SET;
  if(FSAL_TEST_MASK(pfsalattr->asked_attributes, FSAL_ATTR_MTIME_SERVER))
    tmpattrlist[attrlen++] = FATTR4_TIME_MODIFY_SET;
  if(FSAL_TEST_MASK(pfsalattr->asked_attributes, FSAL_ATTR_CTIME))
    tmpattrlist[attrlen++] = FATTR4_TIME_METADATA;
 
  nfs4_list_to_bitmap4(pbitmap, attrlen, tmpattrlist);
}                               /* fsal_interval_proxy_fsalattr2bitmap4 */
コード例 #3
0
void fsal_internal_proxy_create_fattr_fsinfo_bitmap(bitmap4 * pbitmap)
{
  uint32_t tmpattrlist[10];
  uint32_t attrlen = 0;

  pbitmap->bitmap4_len = 2;
  memset(pbitmap->bitmap4_val, 0, sizeof(uint32_t) * pbitmap->bitmap4_len);

  tmpattrlist[0] = FATTR4_FILES_AVAIL;
  tmpattrlist[1] = FATTR4_FILES_FREE;
  tmpattrlist[2] = FATTR4_FILES_TOTAL;
  tmpattrlist[3] = FATTR4_SPACE_AVAIL;
  tmpattrlist[4] = FATTR4_SPACE_FREE;
  tmpattrlist[5] = FATTR4_SPACE_TOTAL;

  attrlen = 6;

  nfs4_list_to_bitmap4(pbitmap, attrlen, tmpattrlist);

}                               /* fsal_internal_proxy_create_fattr_fsinfo_bitmap */
コード例 #4
0
ファイル: nfs41_op_open.c プロジェクト: alangenfeld/cloud-nfs
int nfs41_op_open(struct nfs_argop4 *op, compound_data_t * data, struct nfs_resop4 *resp)
{
    cache_entry_t *pentry_parent = NULL;
    cache_entry_t *pentry_lookup = NULL;
    cache_entry_t *pentry_newfile = NULL;
    fsal_handle_t *pnewfsal_handle = NULL;
    fsal_attrib_list_t attr_parent;
    fsal_attrib_list_t attr;
    fsal_attrib_list_t attr_newfile;
    fsal_attrib_list_t sattr;
    fsal_openflags_t openflags = 0;
    cache_inode_status_t cache_status;
    nfsstat4 rc;
    int retval;
    fsal_name_t filename;
    bool_t AttrProvided = FALSE;
    fsal_accessmode_t mode = 0600;
    nfs_fh4 newfh4;
    nfs_client_id_t nfs_clientid;
    nfs_worker_data_t *pworker = NULL;
    int convrc = 0;
    char __attribute__ ((__unused__)) funcname[] = "nfs4_op_open";

    cache_inode_state_data_t candidate_data;
    cache_inode_state_type_t candidate_type;
    cache_inode_state_t *pfile_state = NULL;
    cache_inode_state_t *pstate_found_iterate = NULL;
    cache_inode_state_t *pstate_previous_iterate = NULL;
    cache_inode_state_t *pstate_found_same_owner = NULL;

    cache_inode_open_owner_name_t owner_name;
    cache_inode_open_owner_name_t *powner_name = NULL;
    cache_inode_open_owner_t *powner = NULL;
    bool_t open_owner_known = FALSE;

    resp->resop = NFS4_OP_OPEN;
    res_OPEN4.status = NFS4_OK;

    uint32_t tmp_attr[2];
    uint_t tmp_int = 2;

    int pnfs_status;
    cache_inode_create_arg_t create_arg;

    pworker = (nfs_worker_data_t *) data->pclient->pworker;

    /* If there is no FH */
    if(nfs4_Is_Fh_Empty(&(data->currentFH)))
    {
        res_OPEN4.status = NFS4ERR_NOFILEHANDLE;
        return res_OPEN4.status;
    }

    /* If the filehandle is invalid */
    if(nfs4_Is_Fh_Invalid(&(data->currentFH)))
    {
        res_OPEN4.status = NFS4ERR_BADHANDLE;
        return res_OPEN4.status;
    }

    /* Tests if the Filehandle is expired (for volatile filehandle) */
    if(nfs4_Is_Fh_Expired(&(data->currentFH)))
    {
        res_OPEN4.status = NFS4ERR_FHEXPIRED;
        return res_OPEN4.status;
    }

    /* This can't be done on the pseudofs */
    if(nfs4_Is_Fh_Pseudo(&(data->currentFH)))
    {
        res_OPEN4.status = NFS4ERR_ROFS;
        return res_OPEN4.status;
    }

    /* If Filehandle points to a xattr object, manage it via the xattrs specific functions */
    if(nfs4_Is_Fh_Xattr(&(data->currentFH)))
        return nfs4_op_open_xattr(op, data, resp);

    /* If data->current_entry is empty, repopulate it */
    if(data->current_entry == NULL)
    {
        if((data->current_entry = nfs_FhandleToCache(NFS_V4,
                                  NULL,
                                  NULL,
                                  &(data->currentFH),
                                  NULL,
                                  NULL,
                                  &(res_OPEN4.status),
                                  &attr,
                                  data->pcontext,
                                  data->pclient,
                                  data->ht, &retval)) == NULL)
        {
            res_OPEN4.status = NFS4ERR_SERVERFAULT;
            return res_OPEN4.status;
        }
    }

    /* Set parent */
    pentry_parent = data->current_entry;

    /* First switch is based upon claim type */
    switch (arg_OPEN4.claim.claim)
    {
    case CLAIM_DELEGATE_CUR:
    case CLAIM_DELEGATE_PREV:
        /* Check for name length */
        if(arg_OPEN4.claim.open_claim4_u.file.utf8string_len > FSAL_MAX_NAME_LEN)
        {
            res_OPEN4.status = NFS4ERR_NAMETOOLONG;
            return res_OPEN4.status;
        }

        /* get the filename from the argument, it should not be empty */
        if(arg_OPEN4.claim.open_claim4_u.file.utf8string_len == 0)
        {
            res_OPEN4.status = NFS4ERR_INVAL;
            return res_OPEN4.status;
        }

        res_OPEN4.status = NFS4ERR_NOTSUPP;
        return res_OPEN4.status;
        break;

    case CLAIM_NULL:
        /* Check for name length */
        if(arg_OPEN4.claim.open_claim4_u.file.utf8string_len > FSAL_MAX_NAME_LEN)
        {
            res_OPEN4.status = NFS4ERR_NAMETOOLONG;
            return res_OPEN4.status;
        }

        /* get the filename from the argument, it should not be empty */
        if(arg_OPEN4.claim.open_claim4_u.file.utf8string_len == 0)
        {
            res_OPEN4.status = NFS4ERR_INVAL;
            return res_OPEN4.status;
        }

        /* Check if asked attributes are correct */
        if(arg_OPEN4.openhow.openflag4_u.how.mode == GUARDED4 ||
                arg_OPEN4.openhow.openflag4_u.how.mode == UNCHECKED4)
        {
            if(!nfs4_Fattr_Supported
                    (&arg_OPEN4.openhow.openflag4_u.how.createhow4_u.createattrs))
            {
                res_OPEN4.status = NFS4ERR_ATTRNOTSUPP;
                return res_OPEN4.status;
            }

            /* Do not use READ attr, use WRITE attr */
            if(!nfs4_Fattr_Check_Access
                    (&arg_OPEN4.openhow.openflag4_u.how.createhow4_u.createattrs,
                     FATTR4_ATTR_WRITE))
            {
                res_OPEN4.status = NFS4ERR_INVAL;
                return res_OPEN4.status;
            }
        }

        /* Check if filename is correct */
        if((cache_status =
                    cache_inode_error_convert(FSAL_buffdesc2name
                                              ((fsal_buffdesc_t *) & arg_OPEN4.claim.open_claim4_u.
                                               file, &filename))) != CACHE_INODE_SUCCESS)
        {
            res_OPEN4.status = nfs4_Errno(cache_status);
            return res_OPEN4.status;
        }

        /* Check parent */
        pentry_parent = data->current_entry;

        /* Parent must be a directory */
        if((pentry_parent->internal_md.type != DIR_BEGINNING) &&
                (pentry_parent->internal_md.type != DIR_CONTINUE))
        {
            /* Parent object is not a directory... */
            if(pentry_parent->internal_md.type == SYMBOLIC_LINK)
                res_OPEN4.status = NFS4ERR_SYMLINK;
            else
                res_OPEN4.status = NFS4ERR_NOTDIR;

            return res_OPEN4.status;
        }

        /* What kind of open is it ? */

        LogFullDebug(COMPONENT_NFS_V4,
                     "     OPEN: Claim type = %d   Open Type = %d  Share Deny = %d   Share Access = %d \n",
                     arg_OPEN4.claim.claim, arg_OPEN4.openhow.opentype, arg_OPEN4.share_deny,
                     arg_OPEN4.share_access);


        /* It this a known client id ? */
        LogDebug(COMPONENT_NFS_V4, "OPEN Client id = %llx", arg_OPEN4.owner.clientid);

        /* Is this open_owner known ? */
        if(!nfs_convert_open_owner(&arg_OPEN4.owner, &owner_name))
        {
            res_OPEN4.status = NFS4ERR_SERVERFAULT;
            return res_OPEN4.status;
        }

        if(!nfs_open_owner_Get_Pointer(&owner_name, &powner))
        {
            /* This open owner is not known yet, allocated and set up a new one */
            GET_PREALLOC(powner,
                         data->pclient->pool_open_owner,
                         data->pclient->nb_pre_state_v4, cache_inode_open_owner_t, next);

            GET_PREALLOC(powner_name,
                         data->pclient->pool_open_owner_name,
                         data->pclient->nb_pre_state_v4,
                         cache_inode_open_owner_name_t, next);

            if(powner == NULL || powner_name == NULL)
            {
                res_OPEN4.status = NFS4ERR_SERVERFAULT;
                return res_OPEN4.status;
            }

            memcpy((char *)powner_name, (char *)&owner_name,
                   sizeof(cache_inode_open_owner_name_t));

            /* set up the content of the open_owner */
            powner->confirmed = FALSE;
            powner->seqid = 1;    /* NFSv4.1 specific, initial seqid is 1 */
            powner->related_owner = NULL;
            powner->next = NULL;
            powner->clientid = arg_OPEN4.owner.clientid;
            powner->owner_len = arg_OPEN4.owner.owner.owner_len;
            memcpy((char *)powner->owner_val, (char *)arg_OPEN4.owner.owner.owner_val,
                   arg_OPEN4.owner.owner.owner_len);
            powner->owner_val[powner->owner_len] = '\0';

            pthread_mutex_init(&powner->lock, NULL);

            if(!nfs_open_owner_Set(powner_name, powner))
            {
                res_OPEN4.status = NFS4ERR_SERVERFAULT;
                return res_OPEN4.status;
            }

        }

        /* Status of parent directory before the operation */
        if((cache_status = cache_inode_getattr(pentry_parent,
                                               &attr_parent,
                                               data->ht,
                                               data->pclient,
                                               data->pcontext,
                                               &cache_status)) != CACHE_INODE_SUCCESS)
        {
            res_OPEN4.status = nfs4_Errno(cache_status);
            return res_OPEN4.status;
        }
        memset(&(res_OPEN4.OPEN4res_u.resok4.cinfo.before), 0, sizeof(changeid4));
        res_OPEN4.OPEN4res_u.resok4.cinfo.before =
            (changeid4) pentry_parent->internal_md.mod_time;

        /* CLient may have provided fattr4 to set attributes at creation time */
        if(arg_OPEN4.openhow.openflag4_u.how.mode == GUARDED4 ||
                arg_OPEN4.openhow.openflag4_u.how.mode == UNCHECKED4)
        {
            if(arg_OPEN4.openhow.openflag4_u.how.createhow4_u.createattrs.attrmask.
                    bitmap4_len != 0)
            {
                /* Convert fattr4 so nfs4_sattr */
                convrc =
                    nfs4_Fattr_To_FSAL_attr(&sattr,
                                            &(arg_OPEN4.openhow.openflag4_u.how.
                                              createhow4_u.createattrs));

                if(convrc == 0)
                {
                    res_OPEN4.status = NFS4ERR_ATTRNOTSUPP;
                    return res_OPEN4.status;
                }

                if(convrc == -1)
                {
                    res_OPEN4.status = NFS4ERR_BADXDR;
                    return res_OPEN4.status;
                }

                AttrProvided = TRUE;
            }

        }

        /* Second switch is based upon "openhow" */
        switch (arg_OPEN4.openhow.opentype)
        {
        case OPEN4_CREATE:
            /* a new file is to be created */

            /* Does a file with this name already exist ? */
            pentry_lookup = cache_inode_lookup(pentry_parent,
                                               &filename,
                                               &attr_newfile,
                                               data->ht,
                                               data->pclient,
                                               data->pcontext, &cache_status);

            if(cache_status != CACHE_INODE_NOT_FOUND)
            {
                /* if open is UNCHECKED, return NFS4_OK (RFC3530 page 172) */
                if(arg_OPEN4.openhow.openflag4_u.how.mode == UNCHECKED4
                        && (cache_status == CACHE_INODE_SUCCESS))
                {
                    /* If the file is opened for write, OPEN4 while deny share write access,
                     * in this case, check caller has write access to the file */
                    if(arg_OPEN4.share_deny & OPEN4_SHARE_DENY_WRITE)
                    {
                        if(cache_inode_access(pentry_lookup,
                                              FSAL_W_OK,
                                              data->ht,
                                              data->pclient,
                                              data->pcontext,
                                              &cache_status) != CACHE_INODE_SUCCESS)
                        {
                            res_OPEN4.status = NFS4ERR_ACCESS;
                            return res_OPEN4.status;
                        }
                        openflags = FSAL_O_WRONLY;
                    }

                    /* Same check on read: check for readability of a file before opening it for read */
                    if(arg_OPEN4.share_access & OPEN4_SHARE_ACCESS_READ)
                    {
                        if(cache_inode_access(pentry_lookup,
                                              FSAL_R_OK,
                                              data->ht,
                                              data->pclient,
                                              data->pcontext,
                                              &cache_status) != CACHE_INODE_SUCCESS)
                        {
                            res_OPEN4.status = NFS4ERR_ACCESS;
                            return res_OPEN4.status;
                        }
                        openflags = FSAL_O_RDONLY;
                    }

                    if(AttrProvided == TRUE)      /* Set the attribute if provided */
                    {
                        if((cache_status = cache_inode_setattr(pentry_lookup,
                                                               &sattr,
                                                               data->ht,
                                                               data->pclient,
                                                               data->pcontext,
                                                               &cache_status)) !=
                                CACHE_INODE_SUCCESS)
                        {
                            res_OPEN4.status = nfs4_Errno(cache_status);
                            return res_OPEN4.status;
                        }

                        res_OPEN4.OPEN4res_u.resok4.attrset =
                            arg_OPEN4.openhow.openflag4_u.how.createhow4_u.createattrs.
                            attrmask;
                    }
                    else
                        res_OPEN4.OPEN4res_u.resok4.attrset.bitmap4_len = 0;

                    /* Same check on write */
                    if(arg_OPEN4.share_access & OPEN4_SHARE_ACCESS_WRITE)
                    {
                        if(cache_inode_access(pentry_lookup,
                                              FSAL_W_OK,
                                              data->ht,
                                              data->pclient,
                                              data->pcontext,
                                              &cache_status) != CACHE_INODE_SUCCESS)
                        {
                            res_OPEN4.status = NFS4ERR_ACCESS;
                            return res_OPEN4.status;
                        }
                        openflags = FSAL_O_RDWR;
                    }

                    /* Set the state for the related file */

                    /* Prepare state management structure */
                    candidate_type = CACHE_INODE_STATE_SHARE;
                    candidate_data.share.share_deny = arg_OPEN4.share_deny;
                    candidate_data.share.share_access = arg_OPEN4.share_access;

                    if(cache_inode_add_state(pentry_lookup,
                                             candidate_type,
                                             &candidate_data,
                                             powner,
                                             data->pclient,
                                             data->pcontext,
                                             &pfile_state,
                                             &cache_status) != CACHE_INODE_SUCCESS)
                    {
                        /* Seqid has to be incremented even in this case */
                        P(powner->lock);
                        powner->seqid += 1;
                        V(powner->lock);

                        res_OPEN4.status = NFS4ERR_SHARE_DENIED;
                        return res_OPEN4.status;
                    }

                    /* Open the file */
                    if(cache_inode_open_by_name(pentry_parent,
                                                &filename,
                                                pentry_lookup,
                                                data->pclient,
                                                openflags,
                                                data->pcontext,
                                                &cache_status) != CACHE_INODE_SUCCESS)
                    {
                        /* Seqid has to be incremented even in this case */
                        P(powner->lock);
                        powner->seqid += 1;
                        V(powner->lock);

                        res_OPEN4.status = NFS4ERR_SHARE_DENIED;
                        res_OPEN4.status = NFS4ERR_ACCESS;
                        return res_OPEN4.status;
                    }

                    res_OPEN4.OPEN4res_u.resok4.attrset.bitmap4_len = 2;
                    if((res_OPEN4.OPEN4res_u.resok4.attrset.bitmap4_val =
                                (uint32_t *) Mem_Alloc(res_OPEN4.OPEN4res_u.resok4.attrset.
                                                       bitmap4_len * sizeof(uint32_t))) == NULL)
                    {
                        res_OPEN4.status = NFS4ERR_SERVERFAULT;
                        return res_OPEN4.status;
                    }

                    memset(&(res_OPEN4.OPEN4res_u.resok4.cinfo.after), 0,
                           sizeof(changeid4));
                    res_OPEN4.OPEN4res_u.resok4.cinfo.after =
                        (changeid4) pentry_parent->internal_md.mod_time;
                    res_OPEN4.OPEN4res_u.resok4.cinfo.atomic = TRUE;

                    res_OPEN4.OPEN4res_u.resok4.stateid.seqid = pfile_state->seqid;
                    memcpy(res_OPEN4.OPEN4res_u.resok4.stateid.other,
                           pfile_state->stateid_other, 12);

                    /* No delegation */
                    res_OPEN4.OPEN4res_u.resok4.delegation.delegation_type =
                        OPEN_DELEGATE_NONE;
                    res_OPEN4.OPEN4res_u.resok4.rflags = OPEN4_RESULT_LOCKTYPE_POSIX;

                    /* Now produce the filehandle to this file */
                    if((pnewfsal_handle =
                                cache_inode_get_fsal_handle(pentry_lookup, &cache_status)) == NULL)
                    {
                        res_OPEN4.status = nfs4_Errno(cache_status);
                        return res_OPEN4.status;
                    }

                    /* Allocation of a new file handle */
                    if((rc = nfs4_AllocateFH(&newfh4)) != NFS4_OK)
                    {
                        res_OPEN4.status = rc;
                        return res_OPEN4.status;
                    }

                    /* Building a new fh */
                    if(!nfs4_FSALToFhandle(&newfh4, pnewfsal_handle, data))
                    {
                        res_OPEN4.status = NFS4ERR_SERVERFAULT;
                        return res_OPEN4.status;
                    }

                    /* This new fh replaces the current FH */
                    data->currentFH.nfs_fh4_len = newfh4.nfs_fh4_len;
                    memcpy(data->currentFH.nfs_fh4_val, newfh4.nfs_fh4_val,
                           newfh4.nfs_fh4_len);

                    data->current_entry = pentry_lookup;
                    data->current_filetype = REGULAR_FILE;

                    res_OPEN4.status = NFS4_OK;
                    return res_OPEN4.status;
                }

                /* if open is EXCLUSIVE, but verifier is the same, return NFS4_OK (RFC3530 page 173) */
                if(arg_OPEN4.openhow.openflag4_u.how.mode == EXCLUSIVE4)
                {
                    if((pentry_lookup != NULL)
                            && (pentry_lookup->internal_md.type == REGULAR_FILE))
                    {
                        pstate_found_iterate = NULL;
                        pstate_previous_iterate = NULL;

                        do
                        {
                            cache_inode_state_iterate(pentry_lookup,
                                                      &pstate_found_iterate,
                                                      pstate_previous_iterate,
                                                      data->pclient,
                                                      data->pcontext, &cache_status);
                            if(cache_status == CACHE_INODE_STATE_ERROR)
                                break;

                            if(cache_status == CACHE_INODE_INVALID_ARGUMENT)
                            {
                                /* Seqid has to be incremented even in this case */
                                P(powner->lock);
                                powner->seqid += 1;
                                V(powner->lock);

                                res_OPEN4.status = NFS4ERR_INVAL;
                                return res_OPEN4.status;
                            }

                            /* Check is open_owner is the same */
                            if(pstate_found_iterate != NULL)
                            {
                                if((pstate_found_iterate->state_type ==
                                        CACHE_INODE_STATE_SHARE)
                                        && !memcmp(arg_OPEN4.owner.owner.owner_val,
                                                   pstate_found_iterate->powner->owner_val,
                                                   pstate_found_iterate->powner->owner_len)
                                        && !memcmp(pstate_found_iterate->state_data.share.
                                                   oexcl_verifier,
                                                   arg_OPEN4.openhow.openflag4_u.how.
                                                   createhow4_u.createverf, NFS4_VERIFIER_SIZE))
                                {

                                    /* A former open EXCLUSIVE with same owner and verifier was found, resend it */
                                    res_OPEN4.OPEN4res_u.resok4.stateid.seqid =
                                        pstate_found_iterate->seqid;
                                    memcpy(res_OPEN4.OPEN4res_u.resok4.stateid.other,
                                           pstate_found_iterate->stateid_other, 12);

                                    memset(&(res_OPEN4.OPEN4res_u.resok4.cinfo.after), 0,
                                           sizeof(changeid4));
                                    res_OPEN4.OPEN4res_u.resok4.cinfo.after =
                                        (changeid4) pentry_parent->internal_md.mod_time;
                                    res_OPEN4.OPEN4res_u.resok4.cinfo.atomic = TRUE;

                                    /* No delegation */
                                    res_OPEN4.OPEN4res_u.resok4.delegation.delegation_type =
                                        OPEN_DELEGATE_NONE;
                                    res_OPEN4.OPEN4res_u.resok4.rflags =
                                        OPEN4_RESULT_LOCKTYPE_POSIX;

                                    /* Now produce the filehandle to this file */
                                    if((pnewfsal_handle =
                                                cache_inode_get_fsal_handle(pentry_lookup,
                                                                            &cache_status)) == NULL)
                                    {
                                        res_OPEN4.status = nfs4_Errno(cache_status);
                                        return res_OPEN4.status;
                                    }

                                    /* Allocation of a new file handle */
                                    if((rc = nfs4_AllocateFH(&newfh4)) != NFS4_OK)
                                    {
                                        res_OPEN4.status = rc;
                                        return res_OPEN4.status;
                                    }

                                    /* Building a new fh */
                                    if(!nfs4_FSALToFhandle(&newfh4, pnewfsal_handle, data))
                                    {
                                        res_OPEN4.status = NFS4ERR_SERVERFAULT;
                                        return res_OPEN4.status;
                                    }

                                    /* This new fh replaces the current FH */
                                    data->currentFH.nfs_fh4_len = newfh4.nfs_fh4_len;
                                    memcpy(data->currentFH.nfs_fh4_val, newfh4.nfs_fh4_val,
                                           newfh4.nfs_fh4_len);

                                    data->current_entry = pentry_lookup;
                                    data->current_filetype = REGULAR_FILE;

                                    /* regular exit */
                                    res_OPEN4.status = NFS4_OK;
                                    return res_OPEN4.status;
                                }

                            }
                            /* if( pstate_found_iterate != NULL ) */
                            pstate_previous_iterate = pstate_found_iterate;
                        }
                        while(pstate_found_iterate != NULL);
                    }
                }

                /* Managing GUARDED4 mode */
                if(cache_status != CACHE_INODE_SUCCESS)
                    res_OPEN4.status = nfs4_Errno(cache_status);
                else
                    res_OPEN4.status = NFS4ERR_EXIST;       /* File already exists */
                return res_OPEN4.status;
            }

            /*  if( cache_status != CACHE_INODE_NOT_FOUND ), if file already exists basically */
            LogFullDebug(COMPONENT_NFS_V4, "    OPEN open.how = %d\n", arg_OPEN4.openhow.openflag4_u.how.mode);

            create_arg.use_pnfs = FALSE;
#ifdef _USE_PNFS
            /*  set the file has "managed via pNFS" */
            if(data->pexport->options & EXPORT_OPTION_USE_PNFS)
                create_arg.use_pnfs = TRUE;
#endif                          /* _USE_PNFS */

            /* Create the file, if we reach this point, it does not exist, we can create it */
            if((pentry_newfile = cache_inode_create(pentry_parent,
                                                    &filename,
                                                    REGULAR_FILE,
                                                    mode,
                                                    &create_arg,
                                                    &attr_newfile,
                                                    data->ht,
                                                    data->pclient,
                                                    data->pcontext, &cache_status)) == NULL)
            {
                /* If the file already exists, this is not an error if open mode is UNCHECKED */
                if(cache_status != CACHE_INODE_ENTRY_EXISTS)
                {
                    res_OPEN4.status = nfs4_Errno(cache_status);
                    return res_OPEN4.status;
                }
                else
                {
                    /* If this point is reached, then the file already exists, cache_status == CACHE_INODE_ENTRY_EXISTS and pentry_newfile == NULL
                       This probably means EXCLUSIVE4 mode is used and verifier matches. pentry_newfile is then set to pentry_lookup */
                    pentry_newfile = pentry_lookup;
                }
            }

            /* Prepare state management structure */
            candidate_type = CACHE_INODE_STATE_SHARE;
            candidate_data.share.share_deny = arg_OPEN4.share_deny;
            candidate_data.share.share_access = arg_OPEN4.share_access;
            candidate_data.share.lockheld = 0;

            /* If file is opened under mode EXCLUSIVE4, open verifier should be kept to detect non vicious double open */
            if(arg_OPEN4.openhow.openflag4_u.how.mode == EXCLUSIVE4)
            {
                strncpy(candidate_data.share.oexcl_verifier,
                        arg_OPEN4.openhow.openflag4_u.how.createhow4_u.createverf,
                        NFS4_VERIFIER_SIZE);
            }

            if(cache_inode_add_state(pentry_newfile,
                                     candidate_type,
                                     &candidate_data,
                                     powner,
                                     data->pclient,
                                     data->pcontext,
                                     &pfile_state, &cache_status) != CACHE_INODE_SUCCESS)
            {
                /* Seqid has to be incremented even in this case */
                P(powner->lock);
                powner->seqid += 1;
                V(powner->lock);

                res_OPEN4.status = NFS4ERR_SHARE_DENIED;
                return res_OPEN4.status;
            }

            if(AttrProvided == TRUE)      /* Set the attribute if provided */
            {
                if((cache_status = cache_inode_setattr(pentry_newfile,
                                                       &sattr,
                                                       data->ht,
                                                       data->pclient,
                                                       data->pcontext,
                                                       &cache_status)) !=
                        CACHE_INODE_SUCCESS)
                {
                    res_OPEN4.status = nfs4_Errno(cache_status);
                    return res_OPEN4.status;
                }

            }

            /* Set the openflags variable */
            if(arg_OPEN4.share_deny & OPEN4_SHARE_DENY_WRITE)
                openflags |= FSAL_O_RDONLY;
            if(arg_OPEN4.share_deny & OPEN4_SHARE_DENY_READ)
                openflags |= FSAL_O_WRONLY;
            if(arg_OPEN4.share_access & OPEN4_SHARE_ACCESS_WRITE)
                openflags = FSAL_O_RDWR;
            if(arg_OPEN4.share_access != 0)
                openflags = FSAL_O_RDWR;    /* @todo : BUGAZOMEU : Something better later */

            /* Open the file */
            if(cache_inode_open_by_name(pentry_parent,
                                        &filename,
                                        pentry_newfile,
                                        data->pclient,
                                        openflags,
                                        data->pcontext,
                                        &cache_status) != CACHE_INODE_SUCCESS)
            {
                /* Seqid has to be incremented even in this case */
                P(powner->lock);
                powner->seqid += 1;
                V(powner->lock);

                res_OPEN4.status = NFS4ERR_ACCESS;
                return res_OPEN4.status;
            }

            break;

        case OPEN4_NOCREATE:
            /* It was not a creation, but a regular open */
            /* The filehandle to the new file replaces the current filehandle */
            if(pentry_newfile == NULL)
            {
                if((pentry_newfile = cache_inode_lookup(pentry_parent,
                                                        &filename,
                                                        &attr_newfile,
                                                        data->ht,
                                                        data->pclient,
                                                        data->pcontext,
                                                        &cache_status)) == NULL)
                {
                    res_OPEN4.status = nfs4_Errno(cache_status);
                    return res_OPEN4.status;
                }
            }

            /* OPEN4 is to be done on a file */
            if(pentry_newfile->internal_md.type != REGULAR_FILE)
            {
                if(pentry_newfile->internal_md.type == DIR_BEGINNING
                        || pentry_newfile->internal_md.type == DIR_CONTINUE)
                {
                    res_OPEN4.status = NFS4ERR_ISDIR;
                    return res_OPEN4.status;
                }
                else if(pentry_newfile->internal_md.type == SYMBOLIC_LINK)
                {
                    res_OPEN4.status = NFS4ERR_SYMLINK;
                    return res_OPEN4.status;
                }
                else
                {
                    res_OPEN4.status = NFS4ERR_INVAL;
                    return res_OPEN4.status;
                }
            }

            /* If the file is opened for write, OPEN4 while deny share write access,
             * in this case, check caller has write access to the file */
            if(arg_OPEN4.share_deny & OPEN4_SHARE_DENY_WRITE)
            {
                if(cache_inode_access(pentry_newfile,
                                      FSAL_W_OK,
                                      data->ht,
                                      data->pclient,
                                      data->pcontext, &cache_status) != CACHE_INODE_SUCCESS)
                {
                    res_OPEN4.status = NFS4ERR_ACCESS;
                    return res_OPEN4.status;
                }
                openflags = FSAL_O_WRONLY;
            }

            /* Same check on read: check for readability of a file before opening it for read */
            if(arg_OPEN4.share_access & OPEN4_SHARE_ACCESS_READ)
            {
                if(cache_inode_access(pentry_newfile,
                                      FSAL_R_OK,
                                      data->ht,
                                      data->pclient,
                                      data->pcontext, &cache_status) != CACHE_INODE_SUCCESS)
                {
                    res_OPEN4.status = NFS4ERR_ACCESS;
                    return res_OPEN4.status;
                }
                openflags = FSAL_O_RDONLY;
            }

            /* Same check on write */
            if(arg_OPEN4.share_access & OPEN4_SHARE_ACCESS_WRITE)
            {
                if(cache_inode_access(pentry_newfile,
                                      FSAL_W_OK,
                                      data->ht,
                                      data->pclient,
                                      data->pcontext, &cache_status) != CACHE_INODE_SUCCESS)
                {
                    res_OPEN4.status = NFS4ERR_ACCESS;
                    return res_OPEN4.status;
                }
                openflags = FSAL_O_RDWR;
            }

            /* Try to find if the same open_owner already has acquired a stateid for this file */
            pstate_found_iterate = NULL;
            pstate_previous_iterate = NULL;
            do
            {
                cache_inode_state_iterate(pentry_newfile,
                                          &pstate_found_iterate,
                                          pstate_previous_iterate,
                                          data->pclient, data->pcontext, &cache_status);
                if(cache_status == CACHE_INODE_STATE_ERROR)
                    break;          /* Get out of the loop */

                if(cache_status == CACHE_INODE_INVALID_ARGUMENT)
                {
                    res_OPEN4.status = NFS4ERR_INVAL;
                    return res_OPEN4.status;
                }

                /* Check is open_owner is the same */
                if(pstate_found_iterate != NULL)
                {
                    if((pstate_found_iterate->state_type == CACHE_INODE_STATE_SHARE) &&
                            (pstate_found_iterate->powner->clientid == arg_OPEN4.owner.clientid)
                            &&
                            ((pstate_found_iterate->powner->owner_len ==
                              arg_OPEN4.owner.owner.owner_len)
                             &&
                             (!memcmp
                              (arg_OPEN4.owner.owner.owner_val,
                               pstate_found_iterate->powner->owner_val,
                               pstate_found_iterate->powner->owner_len))))
                    {
                        /* We'll be re-using the found state */
                        pstate_found_same_owner = pstate_found_iterate;
                    }
                    else
                    {

                        /* This is a different owner, check for possible conflicts */

                        if(memcmp(arg_OPEN4.owner.owner.owner_val,
                                  pstate_found_iterate->powner->owner_val,
                                  pstate_found_iterate->powner->owner_len))
                        {
                            switch (pstate_found_iterate->state_type)
                            {
                            case CACHE_INODE_STATE_SHARE:
                                if((pstate_found_iterate->state_data.share.
                                        share_access & OPEN4_SHARE_ACCESS_WRITE)
                                        && (arg_OPEN4.share_deny & OPEN4_SHARE_DENY_WRITE))
                                {
                                    res_OPEN4.status = NFS4ERR_SHARE_DENIED;
                                    return res_OPEN4.status;
                                }

                                break;
                            }
                        }

                    }

                    /* In all cases opening in read access a read denied file or write access to a write denied file
                     * should fail, even if the owner is the same, see discussion in 14.2.16 and 8.9 */
                    if(pstate_found_iterate->state_type == CACHE_INODE_STATE_SHARE)
                    {
                        /* deny read access on read denied file */
                        if((pstate_found_iterate->state_data.share.
                                share_deny & OPEN4_SHARE_DENY_READ)
                                && (arg_OPEN4.share_access & OPEN4_SHARE_ACCESS_READ))
                        {
                            /* Seqid has to be incremented even in this case */
                            P(powner->lock);
                            powner->seqid += 1;
                            V(powner->lock);

                            powner->seqid += 1;
                            res_OPEN4.status = NFS4ERR_SHARE_DENIED;
                            return res_OPEN4.status;
                        }

                        /* deny write access on write denied file */
                        if((pstate_found_iterate->state_data.share.
                                share_deny & OPEN4_SHARE_DENY_WRITE)
                                && (arg_OPEN4.share_access & OPEN4_SHARE_ACCESS_WRITE))
                        {
                            /* Seqid has to be incremented even in this case */
                            P(powner->lock);
                            powner->seqid += 1;
                            V(powner->lock);

                            res_OPEN4.status = NFS4ERR_SHARE_DENIED;
                            return res_OPEN4.status;
                        }

                    }

                }
                /*  if( pstate_found_iterate != NULL ) */
                pstate_previous_iterate = pstate_found_iterate;
            }
            while(pstate_found_iterate != NULL);

            if(pstate_found_same_owner != NULL)
            {
                pfile_state = pstate_found_same_owner;
                pfile_state->seqid += 1;

                P(powner->lock);
                powner->seqid += 1;
                V(powner->lock);

            }
            else
            {
                /* Set the state for the related file */
                /* Prepare state management structure */
                candidate_type = CACHE_INODE_STATE_SHARE;
                candidate_data.share.share_deny = arg_OPEN4.share_deny;
                candidate_data.share.share_access = arg_OPEN4.share_access;

                if(cache_inode_add_state(pentry_newfile,
                                         candidate_type,
                                         &candidate_data,
                                         powner,
                                         data->pclient,
                                         data->pcontext,
                                         &pfile_state,
                                         &cache_status) != CACHE_INODE_SUCCESS)
                {
                    /* Seqid has to be incremented even in this case */
                    P(powner->lock);
                    powner->seqid += 1;
                    V(powner->lock);

                    res_OPEN4.status = NFS4ERR_SHARE_DENIED;
                    return res_OPEN4.status;
                }
            }

            /* Open the file */
            if(cache_inode_open_by_name(pentry_parent,
                                        &filename,
                                        pentry_newfile,
                                        data->pclient,
                                        openflags,
                                        data->pcontext,
                                        &cache_status) != CACHE_INODE_SUCCESS)
            {
                /* Seqid has to be incremented even in this case */
                P(powner->lock);
                powner->seqid += 1;
                V(powner->lock);

                res_OPEN4.status = NFS4ERR_ACCESS;
                return res_OPEN4.status;
            }
            break;

        default:
            /* Seqid has to be incremented even in this case */
            if(powner != NULL)
            {
                P(powner->lock);
                powner->seqid += 1;
                V(powner->lock);
            }

            res_OPEN4.status = NFS4ERR_INVAL;
            return res_OPEN4.status;
            break;
        }                       /* switch( arg_OPEN4.openhow.opentype ) */

        break;

    case CLAIM_PREVIOUS:
        break;

    default:
        /* Seqid has to be incremented even in this case */
        if(powner != NULL)
        {
            P(powner->lock);
            powner->seqid += 1;
            V(powner->lock);
        }

        res_OPEN4.status = NFS4ERR_INVAL;
        return res_OPEN4.status;
        break;
    }                           /*  switch(  arg_OPEN4.claim.claim ) */

    /* Now produce the filehandle to this file */
    if((pnewfsal_handle =
                cache_inode_get_fsal_handle(pentry_newfile, &cache_status)) == NULL)
    {
        res_OPEN4.status = nfs4_Errno(cache_status);
        return res_OPEN4.status;
    }

    /* Allocation of a new file handle */
    if((rc = nfs4_AllocateFH(&newfh4)) != NFS4_OK)
    {
        res_OPEN4.status = rc;
        return res_OPEN4.status;
    }

    /* Building a new fh */
    if(!nfs4_FSALToFhandle(&newfh4, pnewfsal_handle, data))
    {
        res_OPEN4.status = NFS4ERR_SERVERFAULT;
        return res_OPEN4.status;
    }

    /* This new fh replaces the current FH */
    data->currentFH.nfs_fh4_len = newfh4.nfs_fh4_len;
    memcpy(data->currentFH.nfs_fh4_val, newfh4.nfs_fh4_val, newfh4.nfs_fh4_len);

    data->current_entry = pentry_newfile;
    data->current_filetype = REGULAR_FILE;

    /* No do not need newfh any more */
    Mem_Free((char *)newfh4.nfs_fh4_val);

    /* Status of parent directory after the operation */
    if((cache_status = cache_inode_getattr(pentry_parent,
                                           &attr_parent,
                                           data->ht,
                                           data->pclient,
                                           data->pcontext,
                                           &cache_status)) != CACHE_INODE_SUCCESS)
    {
        res_OPEN4.status = nfs4_Errno(cache_status);
        return res_OPEN4.status;
    }

    res_OPEN4.OPEN4res_u.resok4.attrset.bitmap4_len = 2;
    if((res_OPEN4.OPEN4res_u.resok4.attrset.bitmap4_val =
                (uint32_t *) Mem_Alloc(res_OPEN4.OPEN4res_u.resok4.attrset.bitmap4_len *
                                       sizeof(uint32_t))) == NULL)
    {
        res_OPEN4.status = NFS4ERR_SERVERFAULT;
        return res_OPEN4.status;
    }
    res_OPEN4.OPEN4res_u.resok4.attrset.bitmap4_val[0] = 0;       /* No Attributes set */
    res_OPEN4.OPEN4res_u.resok4.attrset.bitmap4_val[1] = 0;       /* No Attributes set */

    if(arg_OPEN4.openhow.opentype == OPEN4_CREATE)
    {
        tmp_int = 2;
        tmp_attr[0] = FATTR4_SIZE;
        tmp_attr[1] = FATTR4_MODE;
        nfs4_list_to_bitmap4(&(res_OPEN4.OPEN4res_u.resok4.attrset), &tmp_int, tmp_attr);
        res_OPEN4.OPEN4res_u.resok4.attrset.bitmap4_len = 2;
    }

    res_OPEN4.OPEN4res_u.resok4.cinfo.after =
        (changeid4) pentry_parent->internal_md.mod_time;
    res_OPEN4.OPEN4res_u.resok4.cinfo.atomic = TRUE;

    res_OPEN4.OPEN4res_u.resok4.stateid.seqid = powner->seqid;
    memcpy(res_OPEN4.OPEN4res_u.resok4.stateid.other, pfile_state->stateid_other, 12);

    /* No delegation */
    res_OPEN4.OPEN4res_u.resok4.delegation.delegation_type = OPEN_DELEGATE_NONE;

    res_OPEN4.OPEN4res_u.resok4.rflags = OPEN4_RESULT_LOCKTYPE_POSIX;

    /* regular exit */
    res_OPEN4.status = NFS4_OK;
    return res_OPEN4.status;
}                               /* nfs41_op_open */