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staging/lustre: remove unused request policies.

Browse Source 
Client policies do not make much sense to have in client-only code,
so remove all references to everything but fifo.
This also removes lustre/libcfs/heap.c and its header, since it was
only used by certain request policies (crr and orr).

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Oleg Drokin
2014-08-28 14:54:23 -04:00
committed by Greg Kroah-Hartman
parent 986f7b9653
commit aa075d31d2
3 changed files with 0 additions and 791 deletions
Download Patch File Download Diff File Expand all files Collapse all files

276
drivers/staging/lustre/lustre/include/lustre_net.h
View File

@@ -1182,276 +1182,6 @@ struct nrs_fifo_req {
/** @} fifo */
/**
* \name CRR-N
*
* CRR-N, Client Round Robin over NIDs
* @{
*/
/**
* private data structure for CRR-N NRS
*/
struct nrs_crrn_net {
struct ptlrpc_nrs_resource cn_res;
cfs_binheap_t *cn_binheap;
struct cfs_hash *cn_cli_hash;
/**
* Used when a new scheduling round commences, in order to synchronize
* all clients with the new round number.
*/
__u64 cn_round;
/**
* Determines the relevant ordering amongst request batches within a
* scheduling round.
*/
__u64 cn_sequence;
/**
* Round Robin quantum; the maximum number of RPCs that each request
* batch for each client can have in a scheduling round.
*/
__u16 cn_quantum;
};
/**
* Object representing a client in CRR-N, as identified by its NID
*/
struct nrs_crrn_client {
struct ptlrpc_nrs_resource cc_res;
struct hlist_node cc_hnode;
lnet_nid_t cc_nid;
/**
* The round number against which this client is currently scheduling
* requests.
*/
__u64 cc_round;
/**
* The sequence number used for requests scheduled by this client during
* the current round number.
*/
__u64 cc_sequence;
atomic_t cc_ref;
/**
* Round Robin quantum; the maximum number of RPCs the client is allowed
* to schedule in a single batch of each round.
*/
__u16 cc_quantum;
/**
* # of pending requests for this client, on all existing rounds
*/
__u16 cc_active;
};
/**
* CRR-N NRS request definition
*/
struct nrs_crrn_req {
/**
* Round number for this request; shared with all other requests in the
* same batch.
*/
__u64 cr_round;
/**
* Sequence number for this request; shared with all other requests in
* the same batch.
*/
__u64 cr_sequence;
};
/**
* CRR-N policy operations.
*/
enum nrs_ctl_crr {
/**
* Read the RR quantum size of a CRR-N policy.
*/
NRS_CTL_CRRN_RD_QUANTUM = PTLRPC_NRS_CTL_1ST_POL_SPEC,
/**
* Write the RR quantum size of a CRR-N policy.
*/
NRS_CTL_CRRN_WR_QUANTUM,
};
/** @} CRR-N */
/**
* \name ORR/TRR
*
* ORR/TRR (Object-based Round Robin/Target-based Round Robin) NRS policies
* @{
*/
/**
* Lower and upper byte offsets of a brw RPC
*/
struct nrs_orr_req_range {
__u64 or_start;
__u64 or_end;
};
/**
* RPC types supported by the ORR/TRR policies
*/
enum nrs_orr_supp {
NOS_OST_READ = (1 << 0),
NOS_OST_WRITE = (1 << 1),
NOS_OST_RW = (NOS_OST_READ | NOS_OST_WRITE),
/**
* Default value for policies.
*/
NOS_DFLT = NOS_OST_READ
};
/**
* As unique keys for grouping RPCs together, we use the object's OST FID for
* the ORR policy, and the OST index for the TRR policy.
*
* XXX: We waste some space for TRR policy instances by using a union, but it
* allows to consolidate some of the code between ORR and TRR, and these
* policies will probably eventually merge into one anyway.
*/
struct nrs_orr_key {
union {
/** object FID for ORR */
struct lu_fid ok_fid;
/** OST index for TRR */
__u32 ok_idx;
};
};
/**
* The largest base string for unique hash/slab object names is
* "nrs_orr_reg_", so 13 characters. We add 3 to this to be used for the CPT
* id number, so this _should_ be more than enough for the maximum number of
* CPTs on any system. If it does happen that this statement is incorrect,
* nrs_orr_genobjname() will inevitably yield a non-unique name and cause
* kmem_cache_create() to complain (on Linux), so the erroneous situation
* will hopefully not go unnoticed.
*/
#define NRS_ORR_OBJ_NAME_MAX (sizeof("nrs_orr_reg_") + 3)
/**
* private data structure for ORR and TRR NRS
*/
struct nrs_orr_data {
struct ptlrpc_nrs_resource od_res;
cfs_binheap_t *od_binheap;
struct cfs_hash *od_obj_hash;
struct kmem_cache *od_cache;
/**
* Used when a new scheduling round commences, in order to synchronize
* all object or OST batches with the new round number.
*/
__u64 od_round;
/**
* Determines the relevant ordering amongst request batches within a
* scheduling round.
*/
__u64 od_sequence;
/**
* RPC types that are currently supported.
*/
enum nrs_orr_supp od_supp;
/**
* Round Robin quantum; the maximum number of RPCs that each request
* batch for each object or OST can have in a scheduling round.
*/
__u16 od_quantum;
/**
* Whether to use physical disk offsets or logical file offsets.
*/
bool od_physical;
/**
* XXX: We need to provide a persistently allocated string to hold
* unique object names for this policy, since in currently supported
* versions of Linux by Lustre, kmem_cache_create() just sets a pointer
* to the name string provided. kstrdup() is used in the version of
* kmeme_cache_create() in current Linux mainline, so we may be able to
* remove this in the future.
*/
char od_objname[NRS_ORR_OBJ_NAME_MAX];
};
/**
* Represents a backend-fs object or OST in the ORR and TRR policies
* respectively
*/
struct nrs_orr_object {
struct ptlrpc_nrs_resource oo_res;
struct hlist_node oo_hnode;
/**
* The round number against which requests are being scheduled for this
* object or OST
*/
__u64 oo_round;
/**
* The sequence number used for requests scheduled for this object or
* OST during the current round number.
*/
__u64 oo_sequence;
/**
* The key of the object or OST for which this structure instance is
* scheduling RPCs
*/
struct nrs_orr_key oo_key;
atomic_t oo_ref;
/**
* Round Robin quantum; the maximum number of RPCs that are allowed to
* be scheduled for the object or OST in a single batch of each round.
*/
__u16 oo_quantum;
/**
* # of pending requests for this object or OST, on all existing rounds
*/
__u16 oo_active;
};
/**
* ORR/TRR NRS request definition
*/
struct nrs_orr_req {
/**
* The offset range this request covers
*/
struct nrs_orr_req_range or_range;
/**
* Round number for this request; shared with all other requests in the
* same batch.
*/
__u64 or_round;
/**
* Sequence number for this request; shared with all other requests in
* the same batch.
*/
__u64 or_sequence;
/**
* For debugging purposes.
*/
struct nrs_orr_key or_key;
/**
* An ORR policy instance has filled in request information while
* enqueueing the request on the service partition's regular NRS head.
*/
unsigned int or_orr_set:1;
/**
* A TRR policy instance has filled in request information while
* enqueueing the request on the service partition's regular NRS head.
*/
unsigned int or_trr_set:1;
/**
* Request offset ranges have been filled in with logical offset
* values.
*/
unsigned int or_logical_set:1;
/**
* Request offset ranges have been filled in with physical offset
* values.
*/
unsigned int or_physical_set:1;
};
/** @} ORR/TRR */
/**
* NRS request
*
@@ -1487,12 +1217,6 @@ struct ptlrpc_nrs_request {
* Fields for the FIFO policy
*/
struct nrs_fifo_req fifo;
/**
* CRR-N request definition
*/
struct nrs_crrn_req crr;
/** ORR and TRR share the same request definition */
struct nrs_orr_req orr;
} nr_u;
/**
* Externally-registering policies may want to use this to allocate

475
drivers/staging/lustre/lustre/libcfs/heap.c
View File

@@ -1,475 +0,0 @@
/*
* GPL HEADER START
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 only,
* as published by the Free Software Foundation.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License version 2 for more details. A copy is
* included in the COPYING file that accompanied this code.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* GPL HEADER END
*/
/*
* Copyright (c) 2011 Intel Corporation
*/
/*
* libcfs/libcfs/heap.c
*
* Author: Eric Barton <eeb@whamcloud.com>
* Liang Zhen <liang@whamcloud.com>
*/
/** \addtogroup heap
*
* @{
*/
#define DEBUG_SUBSYSTEM S_LNET
#include "../../include/linux/libcfs/libcfs.h"
#define CBH_ALLOC(ptr, h) \
do { \
if ((h)->cbh_flags & CBH_FLAG_ATOMIC_GROW) \
LIBCFS_CPT_ALLOC_GFP((ptr), h->cbh_cptab, h->cbh_cptid, \
CBH_NOB, GFP_ATOMIC); \
else \
LIBCFS_CPT_ALLOC((ptr), h->cbh_cptab, h->cbh_cptid, \
CBH_NOB); \
} while (0)
#define CBH_FREE(ptr) LIBCFS_FREE(ptr, CBH_NOB)
/**
* Grows the capacity of a binary heap so that it can handle a larger number of
* \e cfs_binheap_node_t objects.
*
* \param[in] h The binary heap
*
* \retval 0 Successfully grew the heap
* \retval -ENOMEM OOM error
*/
static int
cfs_binheap_grow(cfs_binheap_t *h)
{
cfs_binheap_node_t ***frag1 = NULL;
cfs_binheap_node_t **frag2;
int hwm = h->cbh_hwm;
/* need a whole new chunk of pointers */
LASSERT((h->cbh_hwm & CBH_MASK) == 0);
if (hwm == 0) {
/* first use of single indirect */
CBH_ALLOC(h->cbh_elements1, h);
if (h->cbh_elements1 == NULL)
return -ENOMEM;
goto out;
}
hwm -= CBH_SIZE;
if (hwm < CBH_SIZE * CBH_SIZE) {
/* not filled double indirect */
CBH_ALLOC(frag2, h);
if (frag2 == NULL)
return -ENOMEM;
if (hwm == 0) {
/* first use of double indirect */
CBH_ALLOC(h->cbh_elements2, h);
if (h->cbh_elements2 == NULL) {
CBH_FREE(frag2);
return -ENOMEM;
}
}
h->cbh_elements2[hwm >> CBH_SHIFT] = frag2;
goto out;
}
hwm -= CBH_SIZE * CBH_SIZE;
#if (CBH_SHIFT * 3 < 32)
if (hwm >= CBH_SIZE * CBH_SIZE * CBH_SIZE) {
/* filled triple indirect */
return -ENOMEM;
}
#endif
CBH_ALLOC(frag2, h);
if (frag2 == NULL)
return -ENOMEM;
if (((hwm >> CBH_SHIFT) & CBH_MASK) == 0) {
/* first use of this 2nd level index */
CBH_ALLOC(frag1, h);
if (frag1 == NULL) {
CBH_FREE(frag2);
return -ENOMEM;
}
}
if (hwm == 0) {
/* first use of triple indirect */
CBH_ALLOC(h->cbh_elements3, h);
if (h->cbh_elements3 == NULL) {
CBH_FREE(frag2);
CBH_FREE(frag1);
return -ENOMEM;
}
}
if (frag1 != NULL) {
LASSERT(h->cbh_elements3[hwm >> (2 * CBH_SHIFT)] == NULL);
h->cbh_elements3[hwm >> (2 * CBH_SHIFT)] = frag1;
} else {
frag1 = h->cbh_elements3[hwm >> (2 * CBH_SHIFT)];
LASSERT(frag1 != NULL);
}
frag1[(hwm >> CBH_SHIFT) & CBH_MASK] = frag2;
out:
h->cbh_hwm += CBH_SIZE;
return 0;
}
/**
* Creates and initializes a binary heap instance.
*
* \param[in] ops The operations to be used
* \param[in] flags The heap flags
* \parm[in] count The initial heap capacity in # of elements
* \param[in] arg An optional private argument
* \param[in] cptab The CPT table this heap instance will operate over
* \param[in] cptid The CPT id of \a cptab this heap instance will operate over
*
* \retval valid-pointer A newly-created and initialized binary heap object
* \retval NULL error
*/
cfs_binheap_t *
cfs_binheap_create(cfs_binheap_ops_t *ops, unsigned int flags,
unsigned count, void *arg, struct cfs_cpt_table *cptab,
int cptid)
{
cfs_binheap_t *h;
LASSERT(ops != NULL);
LASSERT(ops->hop_compare != NULL);
LASSERT(cptab != NULL);
LASSERT(cptid == CFS_CPT_ANY ||
(cptid >= 0 && cptid < cptab->ctb_nparts));
LIBCFS_CPT_ALLOC(h, cptab, cptid, sizeof(*h));
if (h == NULL)
return NULL;
h->cbh_ops = ops;
h->cbh_nelements = 0;
h->cbh_hwm = 0;
h->cbh_private = arg;
h->cbh_flags = flags & (~CBH_FLAG_ATOMIC_GROW);
h->cbh_cptab = cptab;
h->cbh_cptid = cptid;
while (h->cbh_hwm < count) { /* preallocate */
if (cfs_binheap_grow(h) != 0) {
cfs_binheap_destroy(h);
return NULL;
}
}
h->cbh_flags |= flags & CBH_FLAG_ATOMIC_GROW;
return h;
}
EXPORT_SYMBOL(cfs_binheap_create);
/**
* Releases all resources associated with a binary heap instance.
*
* Deallocates memory for all indirection levels and the binary heap object
* itself.
*
* \param[in] h The binary heap object
*/
void
cfs_binheap_destroy(cfs_binheap_t *h)
{
int idx0;
int idx1;
int n;
LASSERT(h != NULL);
n = h->cbh_hwm;
if (n > 0) {
CBH_FREE(h->cbh_elements1);
n -= CBH_SIZE;
}
if (n > 0) {
for (idx0 = 0; idx0 < CBH_SIZE && n > 0; idx0++) {
CBH_FREE(h->cbh_elements2[idx0]);
n -= CBH_SIZE;
}
CBH_FREE(h->cbh_elements2);
}
if (n > 0) {
for (idx0 = 0; idx0 < CBH_SIZE && n > 0; idx0++) {
for (idx1 = 0; idx1 < CBH_SIZE && n > 0; idx1++) {
CBH_FREE(h->cbh_elements3[idx0][idx1]);
n -= CBH_SIZE;
}
CBH_FREE(h->cbh_elements3[idx0]);
}
CBH_FREE(h->cbh_elements3);
}
LIBCFS_FREE(h, sizeof(*h));
}
EXPORT_SYMBOL(cfs_binheap_destroy);
/**
* Obtains a double pointer to a heap element, given its index into the binary
* tree.
*
* \param[in] h The binary heap instance
* \param[in] idx The requested node's index
*
* \retval valid-pointer A double pointer to a heap pointer entry
*/
static cfs_binheap_node_t **
cfs_binheap_pointer(cfs_binheap_t *h, unsigned int idx)
{
if (idx < CBH_SIZE)
return &(h->cbh_elements1[idx]);
idx -= CBH_SIZE;
if (idx < CBH_SIZE * CBH_SIZE)
return &(h->cbh_elements2[idx >> CBH_SHIFT][idx & CBH_MASK]);
idx -= CBH_SIZE * CBH_SIZE;
return &(h->cbh_elements3[idx >> (2 * CBH_SHIFT)]\
[(idx >> CBH_SHIFT) & CBH_MASK]\
[idx & CBH_MASK]);
}
/**
* Obtains a pointer to a heap element, given its index into the binary tree.
*
* \param[in] h The binary heap
* \param[in] idx The requested node's index
*
* \retval valid-pointer The requested heap node
* \retval NULL Supplied index is out of bounds
*/
cfs_binheap_node_t *
cfs_binheap_find(cfs_binheap_t *h, unsigned int idx)
{
if (idx >= h->cbh_nelements)
return NULL;
return *cfs_binheap_pointer(h, idx);
}
EXPORT_SYMBOL(cfs_binheap_find);
/**
* Moves a node upwards, towards the root of the binary tree.
*
* \param[in] h The heap
* \param[in] e The node
*
* \retval 1 The position of \a e in the tree was changed at least once
* \retval 0 The position of \a e in the tree was not changed
*/
static int
cfs_binheap_bubble(cfs_binheap_t *h, cfs_binheap_node_t *e)
{
unsigned int cur_idx = e->chn_index;
cfs_binheap_node_t **cur_ptr;
unsigned int parent_idx;
cfs_binheap_node_t **parent_ptr;
int did_sth = 0;
cur_ptr = cfs_binheap_pointer(h, cur_idx);
LASSERT(*cur_ptr == e);
while (cur_idx > 0) {
parent_idx = (cur_idx - 1) >> 1;
parent_ptr = cfs_binheap_pointer(h, parent_idx);
LASSERT((*parent_ptr)->chn_index == parent_idx);
if (h->cbh_ops->hop_compare(*parent_ptr, e))
break;
(*parent_ptr)->chn_index = cur_idx;
*cur_ptr = *parent_ptr;
cur_ptr = parent_ptr;
cur_idx = parent_idx;
did_sth = 1;
}
e->chn_index = cur_idx;
*cur_ptr = e;
return did_sth;
}
/**
* Moves a node downwards, towards the last level of the binary tree.
*
* \param[in] h The heap
* \param[in] e The node
*
* \retval 1 The position of \a e in the tree was changed at least once
* \retval 0 The position of \a e in the tree was not changed
*/
static int
cfs_binheap_sink(cfs_binheap_t *h, cfs_binheap_node_t *e)
{
unsigned int n = h->cbh_nelements;
unsigned int child_idx;
cfs_binheap_node_t **child_ptr;
cfs_binheap_node_t *child;
unsigned int child2_idx;
cfs_binheap_node_t **child2_ptr;
cfs_binheap_node_t *child2;
unsigned int cur_idx;
cfs_binheap_node_t **cur_ptr;
int did_sth = 0;
cur_idx = e->chn_index;
cur_ptr = cfs_binheap_pointer(h, cur_idx);
LASSERT(*cur_ptr == e);
while (cur_idx < n) {
child_idx = (cur_idx << 1) + 1;
if (child_idx >= n)
break;
child_ptr = cfs_binheap_pointer(h, child_idx);
child = *child_ptr;
child2_idx = child_idx + 1;
if (child2_idx < n) {
child2_ptr = cfs_binheap_pointer(h, child2_idx);
child2 = *child2_ptr;
if (h->cbh_ops->hop_compare(child2, child)) {
child_idx = child2_idx;
child_ptr = child2_ptr;
child = child2;
}
}
LASSERT(child->chn_index == child_idx);
if (h->cbh_ops->hop_compare(e, child))
break;
child->chn_index = cur_idx;
*cur_ptr = child;
cur_ptr = child_ptr;
cur_idx = child_idx;
did_sth = 1;
}
e->chn_index = cur_idx;
*cur_ptr = e;
return did_sth;
}
/**
* Sort-inserts a node into the binary heap.
*
* \param[in] h The heap
* \param[in] e The node
*
* \retval 0 Element inserted successfully
* \retval != 0 error
*/
int
cfs_binheap_insert(cfs_binheap_t *h, cfs_binheap_node_t *e)
{
cfs_binheap_node_t **new_ptr;
unsigned int new_idx = h->cbh_nelements;
int rc;
if (new_idx == h->cbh_hwm) {
rc = cfs_binheap_grow(h);
if (rc != 0)
return rc;
}
if (h->cbh_ops->hop_enter) {
rc = h->cbh_ops->hop_enter(h, e);
if (rc != 0)
return rc;
}
e->chn_index = new_idx;
new_ptr = cfs_binheap_pointer(h, new_idx);
h->cbh_nelements++;
*new_ptr = e;
cfs_binheap_bubble(h, e);
return 0;
}
EXPORT_SYMBOL(cfs_binheap_insert);
/**
* Removes a node from the binary heap.
*
* \param[in] h The heap
* \param[in] e The node
*/
void
cfs_binheap_remove(cfs_binheap_t *h, cfs_binheap_node_t *e)
{
unsigned int n = h->cbh_nelements;
unsigned int cur_idx = e->chn_index;
cfs_binheap_node_t **cur_ptr;
cfs_binheap_node_t *last;
LASSERT(cur_idx != CBH_POISON);
LASSERT(cur_idx < n);
cur_ptr = cfs_binheap_pointer(h, cur_idx);
LASSERT(*cur_ptr == e);
n--;
last = *cfs_binheap_pointer(h, n);
h->cbh_nelements = n;
if (last == e)
return;
last->chn_index = cur_idx;
*cur_ptr = last;
if (!cfs_binheap_bubble(h, *cur_ptr))
cfs_binheap_sink(h, *cur_ptr);
e->chn_index = CBH_POISON;
if (h->cbh_ops->hop_exit)
h->cbh_ops->hop_exit(h, e);
}
EXPORT_SYMBOL(cfs_binheap_remove);
/** @} heap */

40
drivers/staging/lustre/lustre/ptlrpc/nrs_crr.c
View File

@@ -1,40 +0,0 @@
/*
* GPL HEADER START
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 only,
* as published by the Free Software Foundation.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License version 2 for more details. A copy is
* included in the COPYING file that accompanied this code.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* GPL HEADER END
*/
/*
* Copyright (c) 2011 Intel Corporation
*
* Copyright 2012 Xyratex Technology Limited
*/
/*
* lustre/ptlrpc/nrs_crr.c
*
* Network Request Scheduler (NRS) CRR-N policy
*
* Request ordering in a batched Round-Robin manner over client NIDs
*
* Author: Liang Zhen <liang@whamcloud.com>
* Author: Nikitas Angelinas <nikitas_angelinas@xyratex.com>
*/
/**
* \addtogoup nrs
* @{
*/