root/branches/cu-security-branch/src/client/sysint/mgmt-remove-dirent.sm @ 8397

/* 
 * (C) 2003 Clemson University and The University of Chicago 
 *
 * See COPYING in top-level directory.
 */

/** \file
 *  \ingroup mgmtint
 *
 *  PVFS2 management interface routines for removing specific directory
 *  entries.  These are used primarily for file system repair purposes,
 *  although they can also be used to create specific inconsistency cases
 *  for testing of failure tolerance.
 */

#include <string.h>
#include <assert.h>

#include "client-state-machine.h"
#include "pvfs2-debug.h"
#include "job.h"
#include "gossip.h"
#include "str-utils.h"
#include "pint-cached-config.h"
#include "PINT-reqproto-encode.h"
#include "pvfs2-internal.h"

extern job_context_id pint_client_sm_context;

static int mgmt_remove_dirent_comp_fn(
    void *v_p, struct PVFS_server_resp *resp_p, int i);

%%

machine pvfs2_client_mgmt_remove_dirent_sm
{
    state init
    {
        run mgmt_remove_dirent_init;
        default => remove_dirent_get_capability;
    }
    
    state remove_dirent_get_capability
    {
        jump pvfs2_client_getattr_sm;
        success => remove_dirent_setup_msgpair;
        default => cleanup;
    }

    state remove_dirent_setup_msgpair
    {
        run mgmt_remove_dirent_setup_msgpair;
        success => remove_dirent_xfer_msgpair;
        default => cleanup;
    }

    state remove_dirent_xfer_msgpair
    {
        jump pvfs2_msgpairarray_sm;
        default => cleanup;
    }

    state cleanup
    {
        run mgmt_remove_dirent_cleanup;
        default => terminate;
    }
}

%%

/** Initiate removal of a specific directory entry.
 */
PVFS_error PVFS_imgmt_remove_dirent(
    PVFS_object_ref parent_ref,
    char *entry,
    const PVFS_credential *credential,
    PVFS_mgmt_op_id *op_id,
    PVFS_hint hints,
    void *user_ptr)
{
    PVFS_error ret = -PVFS_EINVAL;
    PINT_smcb *smcb = NULL;
    PINT_client_sm *sm_p = NULL;

    gossip_debug(GOSSIP_CLIENT_DEBUG,
                 "PVFS_imgmt_remove_dirent entered\n");

    if ((parent_ref.handle == PVFS_HANDLE_NULL) ||
        (parent_ref.fs_id == PVFS_FS_ID_NULL))
    {
        gossip_err("invalid (NULL) required argument\n");
        return ret;
    }

    PINT_smcb_alloc(&smcb, PVFS_MGMT_REMOVE_DIRENT,
             sizeof(struct PINT_client_sm),
             client_op_state_get_machine,
             client_state_machine_terminate,
             pint_client_sm_context);
    if (smcb == NULL)
    {
        return -PVFS_ENOMEM;
    }
    sm_p = PINT_sm_frame(smcb, PINT_FRAME_CURRENT);

    PINT_init_msgarray_params(sm_p, parent_ref.fs_id);
    PINT_init_sysint_credential(sm_p->cred_p, credential);
    sm_p->parent_ref = parent_ref;
    sm_p->u.mgmt_remove_dirent.entry = entry;
    PVFS_hint_copy(hints, &sm_p->hints);

    gossip_debug(
        GOSSIP_CLIENT_DEBUG, "Trying to remove dirent %s under %llu,%d\n",
        sm_p->u.mgmt_remove_dirent.entry, llu(parent_ref.handle),
        parent_ref.fs_id);

    return PINT_client_state_machine_post(
        smcb,  op_id, user_ptr);
}

/** Remove a specific directory entry.
 */
PVFS_error PVFS_mgmt_remove_dirent(
    PVFS_object_ref parent_ref,
    char *entry,
    const PVFS_credential *credential,
    PVFS_hint hints)
{
    PVFS_error ret = -PVFS_EINVAL, error = 0;
    PVFS_mgmt_op_id op_id;

    gossip_debug(GOSSIP_CLIENT_DEBUG,
                 "PVFS_mgmt_remove_dirent entered\n");

    ret = PVFS_imgmt_remove_dirent(
        parent_ref, entry, credential, &op_id, hints, NULL);
    if (ret)
    {
        PVFS_perror_gossip("PVFS_imgmt_remove_dirent call", ret);
        error = ret;
    }
    else
    {
        ret = PVFS_mgmt_wait(op_id, "remove_dirent", &error);
        if (ret)
        {
            PVFS_perror_gossip("PVFS_mgmt_wait call", ret);
            error = ret;
        }
    }

    PINT_mgmt_release(op_id);
    return error;
}

/****************************************************************/

static PINT_sm_action mgmt_remove_dirent_init(
    struct PINT_smcb *smcb, job_status_s *js_p)
{
    struct PINT_client_sm *sm_p = PINT_sm_frame(smcb, PINT_FRAME_CURRENT);
    gossip_debug(GOSSIP_CLIENT_DEBUG, "mgmt_remove_dirent_init called\n");
    
    PINT_SM_GETATTR_STATE_FILL(
        sm_p->getattr,
        sm_p->parent_ref,
        PVFS_ATTR_COMMON_ALL|PVFS_ATTR_DIR_HINT|PVFS_ATTR_CAPABILITY, 
        PVFS_TYPE_NONE,
        0);

    assert(js_p->error_code == 0);
    return SM_ACTION_COMPLETE;
}

static PINT_sm_action mgmt_remove_dirent_setup_msgpair(
    struct PINT_smcb *smcb, job_status_s *js_p)
{
    struct PINT_client_sm *sm_p = PINT_sm_frame(smcb, PINT_FRAME_CURRENT);
    int ret = -PVFS_EINVAL;
    PINT_sm_msgpair_state *msg_p = NULL;

    js_p->error_code = 0;

    PINT_msgpair_init(&sm_p->msgarray_op);
    msg_p = &sm_p->msgarray_op.msgpair;

    PINT_SERVREQ_MGMT_REMOVE_DIRENT_FILL(
        msg_p->req,
        sm_p->getattr.attr.capability,
        sm_p->parent_ref.fs_id,
        sm_p->parent_ref.handle,
        sm_p->u.mgmt_remove_dirent.entry,
        sm_p->hints);

    gossip_debug(GOSSIP_REMOVE_DEBUG, "- doing MGMT_REMOVE_DIRENT %s "
                 "under %llu,%d\n", sm_p->u.mgmt_remove_dirent.entry,
                 llu(sm_p->parent_ref.handle), sm_p->parent_ref.fs_id);

    msg_p->fs_id = sm_p->parent_ref.fs_id;
    msg_p->handle = sm_p->parent_ref.handle;
    msg_p->retry_flag = PVFS_MSGPAIR_NO_RETRY;
    msg_p->comp_fn = mgmt_remove_dirent_comp_fn;

    ret = PINT_cached_config_map_to_server(
        &msg_p->svr_addr, msg_p->handle, msg_p->fs_id);

    if (ret)
    {
        gossip_err("Failed to map server address\n");
        js_p->error_code = ret;
    }

    PINT_sm_push_frame(smcb, 0, &sm_p->msgarray_op);
    return SM_ACTION_COMPLETE;
}

static int mgmt_remove_dirent_comp_fn(
    void *v_p, struct PVFS_server_resp *resp_p, int index)
{
    PINT_smcb *smcb = v_p;
    PINT_client_sm *sm_p __attribute__((unused)) =
        PINT_sm_frame(smcb, PINT_MSGPAIR_PARENT_SM);

    assert(resp_p->op == PVFS_SERV_MGMT_REMOVE_DIRENT);

    if (resp_p->status == 0)
    {
        gossip_debug(
            GOSSIP_CLIENT_DEBUG,
            "  mgmt_remove_dirent_comp_fn: dirent %s under %llu,%d "
            "removed\n", sm_p->u.mgmt_remove_dirent.entry,
            llu(sm_p->parent_ref.handle), sm_p->parent_ref.fs_id);
    }
    return resp_p->status;
}

static PINT_sm_action mgmt_remove_dirent_cleanup(
    struct PINT_smcb *smcb, job_status_s *js_p)
{
    struct PINT_client_sm *sm_p = PINT_sm_frame(smcb, PINT_FRAME_CURRENT);
    gossip_debug(GOSSIP_CLIENT_DEBUG,
                 "mgmt_remove_dirent_cleanup called\n");

    sm_p->error_code = js_p->error_code;

    PINT_SET_OP_COMPLETE;
    return SM_ACTION_TERMINATE;
}

/*
 * Local variables:
 *  mode: c
 *  c-indent-level: 4
 *  c-basic-offset: 4
 * End:
 *
 * vim: ft=c ts=8 sts=4 sw=4 expandtab
 */