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NFS: Add global helper to set up a stand-along nfs4_slot_table 

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Chuck Lever 2013-08-09 12:48:53 -04:00 committed by Trond Myklebust
parent 9d33059c1b
commit 744aa52530
2 changed files with 27 additions and 13 deletions
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38
fs/nfs/nfs4session.c
View File

@ -23,6 +23,14 @@
#define NFSDBG_FACILITY NFSDBG_STATE
static void nfs4_init_slot_table(struct nfs4_slot_table *tbl, const char *queue)
{
tbl->highest_used_slotid = NFS4_NO_SLOT;
spin_lock_init(&tbl->slot_tbl_lock);
rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, queue);
init_completion(&tbl->complete);
}
/*
* nfs4_shrink_slot_table - free retired slots from the slot table
*/
@ -223,6 +231,21 @@ static int nfs4_realloc_slot_table(struct nfs4_slot_table *tbl,
return ret;
}
/**
* nfs4_setup_slot_table - prepare a stand-alone slot table for use
* @tbl: slot table to set up
* @max_reqs: maximum number of requests allowed
* @queue: name to give RPC wait queue
*
* Returns zero on success, or a negative errno.
*/
int nfs4_setup_slot_table(struct nfs4_slot_table *tbl, unsigned int max_reqs,
const char *queue)
{
nfs4_init_slot_table(tbl, queue);
return nfs4_realloc_slot_table(tbl, max_reqs, 0);
}
static bool nfs41_assign_slot(struct rpc_task *task, void *pslot)
{
struct nfs4_sequence_args *args = task->tk_msg.rpc_argp;
@ -425,24 +448,13 @@ int nfs4_setup_session_slot_tables(struct nfs4_session *ses)
struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
{
struct nfs4_session *session;
struct nfs4_slot_table *tbl;
session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
if (!session)
return NULL;
tbl = &session->fc_slot_table;
tbl->highest_used_slotid = NFS4_NO_SLOT;
spin_lock_init(&tbl->slot_tbl_lock);
rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
init_completion(&tbl->complete);
tbl = &session->bc_slot_table;
tbl->highest_used_slotid = NFS4_NO_SLOT;
spin_lock_init(&tbl->slot_tbl_lock);
rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
init_completion(&tbl->complete);
nfs4_init_slot_table(&session->fc_slot_table, "ForeChannel Slot table");
nfs4_init_slot_table(&session->bc_slot_table, "BackChannel Slot table");
session->session_state = 1<<NFS4_SESSION_INITING;
session->clp = clp;

2
fs/nfs/nfs4session.h
View File

@ -72,6 +72,8 @@ enum nfs4_session_state {
NFS4_SESSION_INITING,
};
extern int nfs4_setup_slot_table(struct nfs4_slot_table *tbl,
unsigned int max_reqs, const char *queue);
extern struct nfs4_slot *nfs4_alloc_slot(struct nfs4_slot_table *tbl);
extern void nfs4_free_slot(struct nfs4_slot_table *tbl, struct nfs4_slot *slot);
extern void nfs4_slot_tbl_drain_complete(struct nfs4_slot_table *tbl);