/**
* Get status of entry regarding 'shook' system
* and convert it to robinhood status.
* @return 0 on success, <0 on error.
*/
int ShookGetStatus(const char *path, file_status_t *p_status)
{
shook_state st;
int rc;
if (shook_get_status(path, &st, FALSE) != 0) {
rc = -errno;
DisplayLog(LVL_CRIT, SHOOK_TAG, "ERROR getting state of %s: %s",
path, strerror(-rc));
return rc;
}
if (st != SS_ONLINE)
DisplayLog(LVL_FULL, SHOOK_TAG,
"shook indicates '%s' status is '%s'",
path, shook_attr_val[st]);
*p_status = shook2rbh_status(st);
if (*p_status == (file_status_t)-1) {
DisplayLog(LVL_CRIT, SHOOK_TAG,
"ERROR getting state of %s: unknown status %d", path,
(int)st);
return -EINVAL;
}
return 0;
}
fsal_status_t LUSTREFSAL_truncate(fsal_handle_t * p_filehandle, /* IN */
fsal_op_context_t * p_context, /* IN */
fsal_size_t length, /* IN */
fsal_file_t * file_descriptor, /* Unused in this FSAL */
fsal_attrib_list_t * p_object_attributes /* [ IN/OUT ] */
)
{
int rc, errsv;
fsal_path_t fsalpath;
fsal_status_t st;
int no_trunc = 0;
/* sanity checks.
* note : object_attributes is optional.
*/
if(!p_filehandle || !p_context)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_truncate);
/* get the path of the file and its handle */
st = fsal_internal_Handle2FidPath(p_context, p_filehandle, &fsalpath);
if(FSAL_IS_ERROR(st))
ReturnStatus(st, INDEX_FSAL_truncate);
#ifdef _SHOOK
/* If the file is not online:
* - if truncate(0) => call tuncate(0), then "shook restore_trunc"
* - if truncate(>0) => call "shook restore", then truncate
*/
shook_state state;
rc = shook_get_status(fsalpath.path, &state, FALSE);
if (rc)
{
LogEvent(COMPONENT_FSAL, "Error retrieving shook status of %s: %s",
fsalpath.path, strerror(-rc));
if (rc)
Return(posix2fsal_error(-rc), -rc, INDEX_FSAL_truncate);
}
else if (state != SS_ONLINE)
{
if (length == 0)
{
LogInfo(COMPONENT_FSAL, "File is offline: calling shook restore_trunc");
/* first truncate the file, them call the shook_svr to clear
* the 'released' flag */
TakeTokenFSCall();
rc = truncate(fsalpath.path, 0);
errsv = errno;
ReleaseTokenFSCall();
if (rc == 0)
{
/* use a short timeout of 2s */
rc = shook_server_call(SA_RESTORE_TRUNC, ((lustrefsal_op_context_t *)p_context)->export_context->fsname,
&((lustrefsal_handle_t *)p_filehandle)->data.fid, 2);
if (rc)
Return(posix2fsal_error(-rc), -rc, INDEX_FSAL_truncate);
else {
/* check that file is online, else operation is still
* in progress: return err jukebox */
rc = shook_get_status(fsalpath.path, &state, FALSE);
if (rc)
{
LogEvent(COMPONENT_FSAL, "Error retrieving shook status of %s: %s",
fsalpath.path, strerror(-rc));
if (rc)
Return(posix2fsal_error(-rc), -rc, INDEX_FSAL_truncate);
}
else if (state != SS_ONLINE)
Return(ERR_FSAL_DELAY, -rc, INDEX_FSAL_truncate);
/* OK */
}
/* file is already truncated, no need to truncate again */
no_trunc = 1;
}
else
{
if(errsv == ENOENT)
Return(ERR_FSAL_STALE, errsv, INDEX_FSAL_truncate);
else
Return(posix2fsal_error(errsv), errsv, INDEX_FSAL_truncate);
}
}
else /* length > 0 */
{
/* trigger restore. Give it a chance to retrieve the file in less than a second.
* Else, it returns ETIME that is converted in ERR_DELAY */
rc = shook_server_call(SA_RESTORE, ((lustrefsal_op_context_t *)p_context)->export_context->fsname,
&((lustrefsal_handle_t *)p_filehandle)->data.fid, 1);
if (rc)
Return(posix2fsal_error(-rc), -rc, INDEX_FSAL_truncate);
else {
/* check that file is online, else operation is still
* in progress: return err jukebox */
rc = shook_get_status(fsalpath.path, &state, FALSE);
if (rc)
{
LogEvent(COMPONENT_FSAL, "Error retrieving shook status of %s: %s",
fsalpath.path, strerror(-rc));
if (rc)
Return(posix2fsal_error(-rc), -rc, INDEX_FSAL_truncate);
}
else if (state != SS_ONLINE)
Return(ERR_FSAL_DELAY, -rc, INDEX_FSAL_truncate);
/* OK */
}
/* if rc = 0, file can be opened */
}
}
/* else file is on line */
#endif
/* Executes the POSIX truncate operation */
if (!no_trunc)
{
TakeTokenFSCall();
rc = truncate(fsalpath.path, length);
errsv = errno;
ReleaseTokenFSCall();
}
/* convert return code */
if(rc)
{
if(errsv == ENOENT)
Return(ERR_FSAL_STALE, errsv, INDEX_FSAL_truncate);
else
Return(posix2fsal_error(errsv), errsv, INDEX_FSAL_truncate);
}
/* Optionally retrieve attributes */
if(p_object_attributes)
{
fsal_status_t st;
st = LUSTREFSAL_getattrs(p_filehandle, p_context, p_object_attributes);
if(FSAL_IS_ERROR(st))
{
FSAL_CLEAR_MASK(p_object_attributes->asked_attributes);
FSAL_SET_MASK(p_object_attributes->asked_attributes, FSAL_ATTR_RDATTR_ERR);
}
}
/* No error occurred */
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_truncate);
}
