List replica entries for a given pool/server/filesystem
#include <sys/types.h>
#include "dpns_api.h"
struct dpns_filereplica *dpns_listreplicax (const char *poolname, const char *server, const char *fs, int flags, dpns_list *listp)
dpns_listreplicax lists replica entries for a given pool/server/filesystem. This routine returns a pointer to a structure containing the current replica entry.
struct dpns_filereplica {
u_signed64 fileid;
u_signed64 nbaccesses;
time_t atime; /* last access to replica */
time_t ptime; /* replica pin time */
char status;
char f_type; /* 'V' for Volatile, 'P' for Permanent */
char poolname[CA_MAXPOOLNAMELEN+1];
char host[CA_MAXHOSTNAMELEN+1];
char fs[80];
char sfn[CA_MAXSFNLEN+1];
};
poolname
specifies the disk pool (only meaningful for the DPM).
server
specifies the Storage Element or disk server hostname.
fs
specifies the file system (only meaningful for the DPM).
flags
may be one of the following constant:
CNS_LIST_BEGIN
the first call must have this flag set to allocate buffers and initialize pointers.
CNS_LIST_CONTINUE
all the following calls must have this flag set.
CNS_LIST_END
final call to terminate the list and free resources.
This routine returns a pointer to a structure containing the current replica entry if the operation was successful or NULL if all entries have been returned or if the operation failed. In the latter case, serrno is set appropriately.
A C program listing the files residing on a given server could look like:
int flags;
dpns_list list;
struct dpns_filereplica *lp;
flags = CNS_LIST_BEGIN;
while ((lp = dpns_listreplicax (NULL, server, NULL, flags, &list))) {
flags = CNS_LIST_CONTINUE;
/* process the entry */
.....
}
(void) dpns_listreplicax (NULL, server, NULL, CNS_LIST_END, &list);
ENOMEM
Memory could not be allocated for the output buffer.
EFAULT
poolname, server and fs are NULL pointers or listp is a NULL pointer.
EINVAL
The length of poolname exceeds CA_MAXPOOLNAMELEN or the length of server exceeds CA_MAXHOSTNAMELEN or the length of fs exceeds 79.
SENOSHOST
Host unknown.
SENOSSERV
Service unknown.
SECOMERR
Communication error.
ENSNACT
Name server is not running or is being shutdown.