svc_reserve(9) [centos man page]

SVC_RESERVE(9)							 Linux Networking						    SVC_RESERVE(9)

NAME

       svc_reserve - change the space reserved for the reply to a request.

SYNOPSIS

       void svc_reserve(struct svc_rqst * rqstp, int space);

ARGUMENTS

       rqstp
	   The request in question

       space
	   new max space to reserve

DESCRIPTION

       Each request reserves some space on the output queue of the transport to make sure the reply fits. This function reduces that reserved
       space to be the amount of space used already, plus space.

COPYRIGHT

Kernel Hackers Manual 3.10					     June 2014							    SVC_RESERVE(9)

DPM_RESERVESPACE(3)					       DPM Library Functions					       DPM_RESERVESPACE(3)

NAME

       dpm_reservespace - reserve space

SYNOPSIS

       #include <sys/types.h>
       #include "dpm_api.h"

       int  dpm_reservespace  (const  char  s_type,  const  char  *u_token,  const char ret_policy, const char ac_latency, u_signed64 req_t_space,
       u_signed64 req_g_space,	time_t	req_lifetime,  int  nbgids,  gid_t  *req_gids,	const  char  *poolname,  char  *actual_s_type,	u_signed64
       *actual_t_space, u_signed64 *actual_g_space, time_t *actual_lifetime, char *s_token)

DESCRIPTION

       dpm_reservespace reserves space.

       The input arguments are:

       s_type specifies the type of space requested. It can be V (for Volatile), D (for Durable), P (for Permanent) or - (for any).

       u_token
	      specifies the user provided description associated with the request.  This argument may be NULL.

       ret_policy
	      specifies the retention policy requested. It can be R (for REPLICA), O (for OUTPUT) or C (for CUSTODIAL).

       ac_latency
	      specifies the access latency requested. It can be O (for ONLINE) or N (for NEARLINE).

       req_t_space
	      Total space requested in bytes.

       req_g_space
	      Guaranteed space requested in bytes.

       req_lifetime
	      specifies the requested space lifetime (in seconds) relative to the current time.

       nbgids is the size of the array of group ids req_gids.

       req_gids
	      when  zero, the space is reserved for the user if the requester has a proxy without VOMS extension or for the group if the requester
	      has a proxy with VOMS extension.	If not zero, the space is reserved for this set of group ids.  If the caller does  not	belong	to
	      the group, it must have ADMIN privileges.

       poolname
	      If not NULL, reserves the space in that disk pool.

       The output arguments are:

       actual_s_type
	      Type of reserved space.

       actual_t_space
	      Total space reserved in bytes (best effort).

       actual_g_space
	      Guaranteed space reserved in bytes.

       actual_lifetime
	      Lifetime of the reserved space (in seconds) relative to the current time.

       s_token
	      Address of a buffer to receive the system allocated token.

RETURN VALUE

       This routine returns 0 if the operation was successful or -1 if the operation failed. In the latter case, serrno is set appropriately.

ERRORS

       EACCES	    The caller does not belong to the group identified by req_gid and does not have ADMIN privileges.

       EFAULT	    nbgids is greater than 0 and req_gids is a NULL pointer.

       EINVAL	    The  space type is invalid or the length of the user space token description is greater than 255, the space requested is not a
		    positive value, the pool name is longer than CA_MAXPOOLNAMELEN or unknown or the number of gids is too big.

       SENOSHOST    Host unknown.

       SEINTERNAL   Database error.

       SECOMERR     Communication error.

LCG
								      $Date$						       DPM_RESERVESPACE(3)