1 // SPDX-License-Identifier: GPL-2.0-only
3 * Common NFS I/O operations for the pnfs file based
6 * Copyright (c) 2014, Primary Data, Inc. All rights reserved.
8 * Tom Haynes <loghyr@primarydata.com>
11 #include <linux/nfs_fs.h>
12 #include <linux/nfs_page.h>
13 #include <linux/sunrpc/addr.h>
14 #include <linux/module.h>
16 #include "nfs4session.h"
20 #define NFSDBG_FACILITY NFSDBG_PNFS
22 void pnfs_generic_rw_release(void *data)
24 struct nfs_pgio_header *hdr = data;
26 nfs_put_client(hdr->ds_clp);
27 hdr->mds_ops->rpc_release(data);
29 EXPORT_SYMBOL_GPL(pnfs_generic_rw_release);
31 /* Fake up some data that will cause nfs_commit_release to retry the writes. */
32 void pnfs_generic_prepare_to_resend_writes(struct nfs_commit_data *data)
34 struct nfs_writeverf *verf = data->res.verf;
36 data->task.tk_status = 0;
37 memset(&verf->verifier, 0, sizeof(verf->verifier));
38 verf->committed = NFS_UNSTABLE;
40 EXPORT_SYMBOL_GPL(pnfs_generic_prepare_to_resend_writes);
42 void pnfs_generic_write_commit_done(struct rpc_task *task, void *data)
44 struct nfs_commit_data *wdata = data;
46 /* Note this may cause RPC to be resent */
47 wdata->mds_ops->rpc_call_done(task, data);
49 EXPORT_SYMBOL_GPL(pnfs_generic_write_commit_done);
51 void pnfs_generic_commit_release(void *calldata)
53 struct nfs_commit_data *data = calldata;
55 data->completion_ops->completion(data);
56 pnfs_put_lseg(data->lseg);
57 nfs_put_client(data->ds_clp);
58 nfs_commitdata_release(data);
60 EXPORT_SYMBOL_GPL(pnfs_generic_commit_release);
62 static struct pnfs_layout_segment *
63 pnfs_free_bucket_lseg(struct pnfs_commit_bucket *bucket)
65 if (list_empty(&bucket->committing) && list_empty(&bucket->written)) {
66 struct pnfs_layout_segment *freeme = bucket->lseg;
73 /* The generic layer is about to remove the req from the commit list.
74 * If this will make the bucket empty, it will need to put the lseg reference.
75 * Note this must be called holding nfsi->commit_mutex
78 pnfs_generic_clear_request_commit(struct nfs_page *req,
79 struct nfs_commit_info *cinfo)
81 struct pnfs_commit_bucket *bucket = NULL;
83 if (!test_and_clear_bit(PG_COMMIT_TO_DS, &req->wb_flags))
85 cinfo->ds->nwritten--;
86 if (list_is_singular(&req->wb_list))
87 bucket = list_first_entry(&req->wb_list,
88 struct pnfs_commit_bucket, written);
90 nfs_request_remove_commit_list(req, cinfo);
92 pnfs_put_lseg(pnfs_free_bucket_lseg(bucket));
94 EXPORT_SYMBOL_GPL(pnfs_generic_clear_request_commit);
96 struct pnfs_commit_array *
97 pnfs_alloc_commit_array(size_t n, gfp_t gfp_flags)
99 struct pnfs_commit_array *p;
100 struct pnfs_commit_bucket *b;
102 p = kmalloc(struct_size(p, buckets, n), gfp_flags);
106 INIT_LIST_HEAD(&p->cinfo_list);
107 INIT_LIST_HEAD(&p->lseg_list);
109 for (b = &p->buckets[0]; n != 0; b++, n--) {
110 INIT_LIST_HEAD(&b->written);
111 INIT_LIST_HEAD(&b->committing);
113 b->direct_verf.committed = NFS_INVALID_STABLE_HOW;
117 EXPORT_SYMBOL_GPL(pnfs_alloc_commit_array);
120 pnfs_free_commit_array(struct pnfs_commit_array *p)
124 EXPORT_SYMBOL_GPL(pnfs_free_commit_array);
126 static struct pnfs_commit_array *
127 pnfs_find_commit_array_by_lseg(struct pnfs_ds_commit_info *fl_cinfo,
128 struct pnfs_layout_segment *lseg)
130 struct pnfs_commit_array *array;
132 list_for_each_entry_rcu(array, &fl_cinfo->commits, cinfo_list) {
133 if (array->lseg == lseg)
139 struct pnfs_commit_array *
140 pnfs_add_commit_array(struct pnfs_ds_commit_info *fl_cinfo,
141 struct pnfs_commit_array *new,
142 struct pnfs_layout_segment *lseg)
144 struct pnfs_commit_array *array;
146 array = pnfs_find_commit_array_by_lseg(fl_cinfo, lseg);
150 refcount_set(&new->refcount, 1);
151 list_add_rcu(&new->cinfo_list, &fl_cinfo->commits);
152 list_add(&new->lseg_list, &lseg->pls_commits);
155 EXPORT_SYMBOL_GPL(pnfs_add_commit_array);
157 static struct pnfs_commit_array *
158 pnfs_lookup_commit_array(struct pnfs_ds_commit_info *fl_cinfo,
159 struct pnfs_layout_segment *lseg)
161 struct pnfs_commit_array *array;
164 array = pnfs_find_commit_array_by_lseg(fl_cinfo, lseg);
167 fl_cinfo->ops->setup_ds_info(fl_cinfo, lseg);
169 array = pnfs_find_commit_array_by_lseg(fl_cinfo, lseg);
176 pnfs_release_commit_array_locked(struct pnfs_commit_array *array)
178 list_del_rcu(&array->cinfo_list);
179 list_del(&array->lseg_list);
180 pnfs_free_commit_array(array);
184 pnfs_put_commit_array_locked(struct pnfs_commit_array *array)
186 if (refcount_dec_and_test(&array->refcount))
187 pnfs_release_commit_array_locked(array);
191 pnfs_put_commit_array(struct pnfs_commit_array *array, struct inode *inode)
193 if (refcount_dec_and_lock(&array->refcount, &inode->i_lock)) {
194 pnfs_release_commit_array_locked(array);
195 spin_unlock(&inode->i_lock);
199 static struct pnfs_commit_array *
200 pnfs_get_commit_array(struct pnfs_commit_array *array)
202 if (refcount_inc_not_zero(&array->refcount))
208 pnfs_remove_and_free_commit_array(struct pnfs_commit_array *array)
211 list_del_init(&array->lseg_list);
212 pnfs_put_commit_array_locked(array);
216 pnfs_generic_ds_cinfo_release_lseg(struct pnfs_ds_commit_info *fl_cinfo,
217 struct pnfs_layout_segment *lseg)
219 struct pnfs_commit_array *array, *tmp;
221 list_for_each_entry_safe(array, tmp, &lseg->pls_commits, lseg_list)
222 pnfs_remove_and_free_commit_array(array);
224 EXPORT_SYMBOL_GPL(pnfs_generic_ds_cinfo_release_lseg);
227 pnfs_generic_ds_cinfo_destroy(struct pnfs_ds_commit_info *fl_cinfo)
229 struct pnfs_commit_array *array, *tmp;
231 list_for_each_entry_safe(array, tmp, &fl_cinfo->commits, cinfo_list)
232 pnfs_remove_and_free_commit_array(array);
234 EXPORT_SYMBOL_GPL(pnfs_generic_ds_cinfo_destroy);
237 * Locks the nfs_page requests for commit and moves them to
238 * @bucket->committing.
241 pnfs_bucket_scan_ds_commit_list(struct pnfs_commit_bucket *bucket,
242 struct nfs_commit_info *cinfo,
245 struct list_head *src = &bucket->written;
246 struct list_head *dst = &bucket->committing;
249 lockdep_assert_held(&NFS_I(cinfo->inode)->commit_mutex);
250 ret = nfs_scan_commit_list(src, dst, cinfo, max);
252 cinfo->ds->nwritten -= ret;
253 cinfo->ds->ncommitting += ret;
258 static int pnfs_bucket_scan_array(struct nfs_commit_info *cinfo,
259 struct pnfs_commit_bucket *buckets,
260 unsigned int nbuckets,
266 for (i = 0; i < nbuckets && max != 0; i++) {
267 cnt = pnfs_bucket_scan_ds_commit_list(&buckets[i], cinfo, max);
274 /* Move reqs from written to committing lists, returning count
277 int pnfs_generic_scan_commit_lists(struct nfs_commit_info *cinfo, int max)
279 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds;
280 struct pnfs_commit_array *array;
284 list_for_each_entry_rcu(array, &fl_cinfo->commits, cinfo_list) {
285 if (!array->lseg || !pnfs_get_commit_array(array))
288 cnt = pnfs_bucket_scan_array(cinfo, array->buckets,
289 array->nbuckets, max);
291 pnfs_put_commit_array(array, cinfo->inode);
300 EXPORT_SYMBOL_GPL(pnfs_generic_scan_commit_lists);
303 pnfs_bucket_recover_commit_reqs(struct list_head *dst,
304 struct pnfs_commit_bucket *buckets,
305 unsigned int nbuckets,
306 struct nfs_commit_info *cinfo)
308 struct pnfs_commit_bucket *b;
309 struct pnfs_layout_segment *freeme;
310 unsigned int nwritten, ret = 0;
314 for (i = 0, b = buckets; i < nbuckets; i++, b++) {
315 nwritten = nfs_scan_commit_list(&b->written, dst, cinfo, 0);
319 freeme = pnfs_free_bucket_lseg(b);
321 pnfs_put_lseg(freeme);
328 /* Pull everything off the committing lists and dump into @dst. */
329 void pnfs_generic_recover_commit_reqs(struct list_head *dst,
330 struct nfs_commit_info *cinfo)
332 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds;
333 struct pnfs_commit_array *array;
334 unsigned int nwritten;
336 lockdep_assert_held(&NFS_I(cinfo->inode)->commit_mutex);
338 list_for_each_entry_rcu(array, &fl_cinfo->commits, cinfo_list) {
339 if (!array->lseg || !pnfs_get_commit_array(array))
342 nwritten = pnfs_bucket_recover_commit_reqs(dst,
347 pnfs_put_commit_array(array, cinfo->inode);
348 fl_cinfo->nwritten -= nwritten;
352 EXPORT_SYMBOL_GPL(pnfs_generic_recover_commit_reqs);
354 static struct nfs_page *
355 pnfs_bucket_search_commit_reqs(struct pnfs_commit_bucket *buckets,
356 unsigned int nbuckets, struct page *page)
358 struct nfs_page *req;
359 struct pnfs_commit_bucket *b;
362 /* Linearly search the commit lists for each bucket until a matching
363 * request is found */
364 for (i = 0, b = buckets; i < nbuckets; i++, b++) {
365 list_for_each_entry(req, &b->written, wb_list) {
366 if (req->wb_page == page)
369 list_for_each_entry(req, &b->committing, wb_list) {
370 if (req->wb_page == page)
377 /* pnfs_generic_search_commit_reqs - Search lists in @cinfo for the head reqest
379 * @cinfo - commit info for current inode
380 * @page - page to search for matching head request
382 * Returns a the head request if one is found, otherwise returns NULL.
385 pnfs_generic_search_commit_reqs(struct nfs_commit_info *cinfo, struct page *page)
387 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds;
388 struct pnfs_commit_array *array;
389 struct nfs_page *req;
391 list_for_each_entry(array, &fl_cinfo->commits, cinfo_list) {
392 req = pnfs_bucket_search_commit_reqs(array->buckets,
393 array->nbuckets, page);
399 EXPORT_SYMBOL_GPL(pnfs_generic_search_commit_reqs);
401 static struct pnfs_layout_segment *
402 pnfs_bucket_get_committing(struct list_head *head,
403 struct pnfs_commit_bucket *bucket,
404 struct nfs_commit_info *cinfo)
406 struct pnfs_layout_segment *lseg;
407 struct list_head *pos;
409 list_for_each(pos, &bucket->committing)
410 cinfo->ds->ncommitting--;
411 list_splice_init(&bucket->committing, head);
412 lseg = pnfs_free_bucket_lseg(bucket);
414 lseg = pnfs_get_lseg(bucket->lseg);
418 static struct nfs_commit_data *
419 pnfs_bucket_fetch_commitdata(struct pnfs_commit_bucket *bucket,
420 struct nfs_commit_info *cinfo)
422 struct nfs_commit_data *data = nfs_commitdata_alloc(false);
426 data->lseg = pnfs_bucket_get_committing(&data->pages, bucket, cinfo);
430 static void pnfs_generic_retry_commit(struct pnfs_commit_bucket *buckets,
431 unsigned int nbuckets,
432 struct nfs_commit_info *cinfo,
435 struct pnfs_commit_bucket *bucket;
436 struct pnfs_layout_segment *freeme;
439 for (bucket = buckets; idx < nbuckets; bucket++, idx++) {
440 if (list_empty(&bucket->committing))
442 mutex_lock(&NFS_I(cinfo->inode)->commit_mutex);
443 freeme = pnfs_bucket_get_committing(&pages, bucket, cinfo);
444 mutex_unlock(&NFS_I(cinfo->inode)->commit_mutex);
445 nfs_retry_commit(&pages, freeme, cinfo, idx);
446 pnfs_put_lseg(freeme);
451 pnfs_bucket_alloc_ds_commits(struct list_head *list,
452 struct pnfs_commit_bucket *buckets,
453 unsigned int nbuckets,
454 struct nfs_commit_info *cinfo)
456 struct pnfs_commit_bucket *bucket;
457 struct nfs_commit_data *data;
459 unsigned int nreq = 0;
461 for (i = 0, bucket = buckets; i < nbuckets; i++, bucket++) {
462 if (list_empty(&bucket->committing))
464 mutex_lock(&NFS_I(cinfo->inode)->commit_mutex);
465 if (!list_empty(&bucket->committing)) {
466 data = pnfs_bucket_fetch_commitdata(bucket, cinfo);
469 data->ds_commit_index = i;
470 list_add_tail(&data->list, list);
473 mutex_unlock(&NFS_I(cinfo->inode)->commit_mutex);
477 mutex_unlock(&NFS_I(cinfo->inode)->commit_mutex);
478 /* Clean up on error */
479 pnfs_generic_retry_commit(buckets, nbuckets, cinfo, i);
484 pnfs_alloc_ds_commits_list(struct list_head *list,
485 struct pnfs_ds_commit_info *fl_cinfo,
486 struct nfs_commit_info *cinfo)
488 struct pnfs_commit_array *array;
489 unsigned int ret = 0;
492 list_for_each_entry_rcu(array, &fl_cinfo->commits, cinfo_list) {
493 if (!array->lseg || !pnfs_get_commit_array(array))
496 ret += pnfs_bucket_alloc_ds_commits(list, array->buckets,
497 array->nbuckets, cinfo);
499 pnfs_put_commit_array(array, cinfo->inode);
505 /* This follows nfs_commit_list pretty closely */
507 pnfs_generic_commit_pagelist(struct inode *inode, struct list_head *mds_pages,
508 int how, struct nfs_commit_info *cinfo,
509 int (*initiate_commit)(struct nfs_commit_data *data,
512 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds;
513 struct nfs_commit_data *data, *tmp;
515 unsigned int nreq = 0;
517 if (!list_empty(mds_pages)) {
518 data = nfs_commitdata_alloc(true);
519 data->ds_commit_index = -1;
520 list_splice_init(mds_pages, &data->pages);
521 list_add_tail(&data->list, &list);
525 nreq += pnfs_alloc_ds_commits_list(&list, fl_cinfo, cinfo);
529 list_for_each_entry_safe(data, tmp, &list, list) {
530 list_del(&data->list);
531 if (data->ds_commit_index < 0) {
532 nfs_init_commit(data, NULL, NULL, cinfo);
533 nfs_initiate_commit(NFS_CLIENT(inode), data,
534 NFS_PROTO(data->inode),
536 RPC_TASK_CRED_NOREF);
538 nfs_init_commit(data, NULL, data->lseg, cinfo);
539 initiate_commit(data, how);
543 return PNFS_ATTEMPTED;
545 EXPORT_SYMBOL_GPL(pnfs_generic_commit_pagelist);
550 * Data servers can be mapped to different device ids.
551 * nfs4_pnfs_ds reference counting
552 * - set to 1 on allocation
553 * - incremented when a device id maps a data server already in the cache.
554 * - decremented when deviceid is removed from the cache.
556 static DEFINE_SPINLOCK(nfs4_ds_cache_lock);
557 static LIST_HEAD(nfs4_data_server_cache);
561 print_ds(struct nfs4_pnfs_ds *ds)
564 printk(KERN_WARNING "%s NULL device\n", __func__);
567 printk(KERN_WARNING " ds %s\n"
570 " cl_exchange_flags %x\n",
572 refcount_read(&ds->ds_count), ds->ds_clp,
573 ds->ds_clp ? ds->ds_clp->cl_exchange_flags : 0);
577 same_sockaddr(struct sockaddr *addr1, struct sockaddr *addr2)
579 struct sockaddr_in *a, *b;
580 struct sockaddr_in6 *a6, *b6;
582 if (addr1->sa_family != addr2->sa_family)
585 switch (addr1->sa_family) {
587 a = (struct sockaddr_in *)addr1;
588 b = (struct sockaddr_in *)addr2;
590 if (a->sin_addr.s_addr == b->sin_addr.s_addr &&
591 a->sin_port == b->sin_port)
596 a6 = (struct sockaddr_in6 *)addr1;
597 b6 = (struct sockaddr_in6 *)addr2;
599 /* LINKLOCAL addresses must have matching scope_id */
600 if (ipv6_addr_src_scope(&a6->sin6_addr) ==
601 IPV6_ADDR_SCOPE_LINKLOCAL &&
602 a6->sin6_scope_id != b6->sin6_scope_id)
605 if (ipv6_addr_equal(&a6->sin6_addr, &b6->sin6_addr) &&
606 a6->sin6_port == b6->sin6_port)
611 dprintk("%s: unhandled address family: %u\n",
612 __func__, addr1->sa_family);
620 * Checks if 'dsaddrs1' contains a subset of 'dsaddrs2'. If it does,
624 _same_data_server_addrs_locked(const struct list_head *dsaddrs1,
625 const struct list_head *dsaddrs2)
627 struct nfs4_pnfs_ds_addr *da1, *da2;
628 struct sockaddr *sa1, *sa2;
631 list_for_each_entry(da1, dsaddrs1, da_node) {
632 sa1 = (struct sockaddr *)&da1->da_addr;
634 list_for_each_entry(da2, dsaddrs2, da_node) {
635 sa2 = (struct sockaddr *)&da2->da_addr;
636 match = same_sockaddr(sa1, sa2);
647 * Lookup DS by addresses. nfs4_ds_cache_lock is held
649 static struct nfs4_pnfs_ds *
650 _data_server_lookup_locked(const struct list_head *dsaddrs)
652 struct nfs4_pnfs_ds *ds;
654 list_for_each_entry(ds, &nfs4_data_server_cache, ds_node)
655 if (_same_data_server_addrs_locked(&ds->ds_addrs, dsaddrs))
660 static struct nfs4_pnfs_ds_addr *nfs4_pnfs_ds_addr_alloc(gfp_t gfp_flags)
662 struct nfs4_pnfs_ds_addr *da = kzalloc(sizeof(*da), gfp_flags);
664 INIT_LIST_HEAD(&da->da_node);
668 static void nfs4_pnfs_ds_addr_free(struct nfs4_pnfs_ds_addr *da)
670 kfree(da->da_remotestr);
675 static void destroy_ds(struct nfs4_pnfs_ds *ds)
677 struct nfs4_pnfs_ds_addr *da;
679 dprintk("--> %s\n", __func__);
683 nfs_put_client(ds->ds_clp);
685 while (!list_empty(&ds->ds_addrs)) {
686 da = list_first_entry(&ds->ds_addrs,
687 struct nfs4_pnfs_ds_addr,
689 list_del_init(&da->da_node);
690 nfs4_pnfs_ds_addr_free(da);
693 kfree(ds->ds_remotestr);
697 void nfs4_pnfs_ds_put(struct nfs4_pnfs_ds *ds)
699 if (refcount_dec_and_lock(&ds->ds_count,
700 &nfs4_ds_cache_lock)) {
701 list_del_init(&ds->ds_node);
702 spin_unlock(&nfs4_ds_cache_lock);
706 EXPORT_SYMBOL_GPL(nfs4_pnfs_ds_put);
709 * Create a string with a human readable address and port to avoid
710 * complicated setup around many dprinks.
713 nfs4_pnfs_remotestr(struct list_head *dsaddrs, gfp_t gfp_flags)
715 struct nfs4_pnfs_ds_addr *da;
720 len = 3; /* '{', '}' and eol */
721 list_for_each_entry(da, dsaddrs, da_node) {
722 len += strlen(da->da_remotestr) + 1; /* string plus comma */
725 remotestr = kzalloc(len, gfp_flags);
732 list_for_each_entry(da, dsaddrs, da_node) {
733 size_t ll = strlen(da->da_remotestr);
738 memcpy(p, da->da_remotestr, ll);
758 * Given a list of multipath struct nfs4_pnfs_ds_addr, add it to ds cache if
759 * uncached and return cached struct nfs4_pnfs_ds.
761 struct nfs4_pnfs_ds *
762 nfs4_pnfs_ds_add(struct list_head *dsaddrs, gfp_t gfp_flags)
764 struct nfs4_pnfs_ds *tmp_ds, *ds = NULL;
767 if (list_empty(dsaddrs)) {
768 dprintk("%s: no addresses defined\n", __func__);
772 ds = kzalloc(sizeof(*ds), gfp_flags);
776 /* this is only used for debugging, so it's ok if its NULL */
777 remotestr = nfs4_pnfs_remotestr(dsaddrs, gfp_flags);
779 spin_lock(&nfs4_ds_cache_lock);
780 tmp_ds = _data_server_lookup_locked(dsaddrs);
781 if (tmp_ds == NULL) {
782 INIT_LIST_HEAD(&ds->ds_addrs);
783 list_splice_init(dsaddrs, &ds->ds_addrs);
784 ds->ds_remotestr = remotestr;
785 refcount_set(&ds->ds_count, 1);
786 INIT_LIST_HEAD(&ds->ds_node);
788 list_add(&ds->ds_node, &nfs4_data_server_cache);
789 dprintk("%s add new data server %s\n", __func__,
794 refcount_inc(&tmp_ds->ds_count);
795 dprintk("%s data server %s found, inc'ed ds_count to %d\n",
796 __func__, tmp_ds->ds_remotestr,
797 refcount_read(&tmp_ds->ds_count));
800 spin_unlock(&nfs4_ds_cache_lock);
804 EXPORT_SYMBOL_GPL(nfs4_pnfs_ds_add);
806 static int nfs4_wait_ds_connect(struct nfs4_pnfs_ds *ds)
809 return wait_on_bit(&ds->ds_state, NFS4DS_CONNECTING, TASK_KILLABLE);
812 static void nfs4_clear_ds_conn_bit(struct nfs4_pnfs_ds *ds)
814 smp_mb__before_atomic();
815 clear_and_wake_up_bit(NFS4DS_CONNECTING, &ds->ds_state);
818 static struct nfs_client *(*get_v3_ds_connect)(
819 struct nfs_server *mds_srv,
820 const struct sockaddr *ds_addr,
823 unsigned int ds_timeo,
824 unsigned int ds_retrans);
826 static bool load_v3_ds_connect(void)
828 if (!get_v3_ds_connect) {
829 get_v3_ds_connect = symbol_request(nfs3_set_ds_client);
830 WARN_ON_ONCE(!get_v3_ds_connect);
833 return(get_v3_ds_connect != NULL);
836 void nfs4_pnfs_v3_ds_connect_unload(void)
838 if (get_v3_ds_connect) {
839 symbol_put(nfs3_set_ds_client);
840 get_v3_ds_connect = NULL;
844 static int _nfs4_pnfs_v3_ds_connect(struct nfs_server *mds_srv,
845 struct nfs4_pnfs_ds *ds,
847 unsigned int retrans)
849 struct nfs_client *clp = ERR_PTR(-EIO);
850 struct nfs4_pnfs_ds_addr *da;
853 dprintk("--> %s DS %s\n", __func__, ds->ds_remotestr);
855 if (!load_v3_ds_connect())
856 return -EPROTONOSUPPORT;
858 list_for_each_entry(da, &ds->ds_addrs, da_node) {
859 dprintk("%s: DS %s: trying address %s\n",
860 __func__, ds->ds_remotestr, da->da_remotestr);
863 struct xprt_create xprt_args = {
864 .ident = da->da_transport,
866 .dstaddr = (struct sockaddr *)&da->da_addr,
867 .addrlen = da->da_addrlen,
868 .servername = clp->cl_hostname,
871 if (da->da_transport != clp->cl_proto)
873 if (da->da_addr.ss_family != clp->cl_addr.ss_family)
875 /* Add this address as an alias */
876 rpc_clnt_add_xprt(clp->cl_rpcclient, &xprt_args,
877 rpc_clnt_test_and_add_xprt, NULL);
880 clp = get_v3_ds_connect(mds_srv,
881 (struct sockaddr *)&da->da_addr,
882 da->da_addrlen, da->da_transport,
886 clp->cl_rpcclient->cl_softerr = 0;
887 clp->cl_rpcclient->cl_softrtry = 0;
891 status = PTR_ERR(clp);
896 WRITE_ONCE(ds->ds_clp, clp);
897 dprintk("%s [new] addr: %s\n", __func__, ds->ds_remotestr);
902 static int _nfs4_pnfs_v4_ds_connect(struct nfs_server *mds_srv,
903 struct nfs4_pnfs_ds *ds,
905 unsigned int retrans,
908 struct nfs_client *clp = ERR_PTR(-EIO);
909 struct nfs4_pnfs_ds_addr *da;
912 dprintk("--> %s DS %s\n", __func__, ds->ds_remotestr);
914 list_for_each_entry(da, &ds->ds_addrs, da_node) {
915 dprintk("%s: DS %s: trying address %s\n",
916 __func__, ds->ds_remotestr, da->da_remotestr);
918 if (!IS_ERR(clp) && clp->cl_mvops->session_trunk) {
919 struct xprt_create xprt_args = {
920 .ident = da->da_transport,
922 .dstaddr = (struct sockaddr *)&da->da_addr,
923 .addrlen = da->da_addrlen,
924 .servername = clp->cl_hostname,
926 struct nfs4_add_xprt_data xprtdata = {
929 struct rpc_add_xprt_test rpcdata = {
930 .add_xprt_test = clp->cl_mvops->session_trunk,
934 if (da->da_transport != clp->cl_proto)
936 if (da->da_addr.ss_family != clp->cl_addr.ss_family)
939 * Test this address for session trunking and
942 xprtdata.cred = nfs4_get_clid_cred(clp),
943 rpc_clnt_add_xprt(clp->cl_rpcclient, &xprt_args,
944 rpc_clnt_setup_test_and_add_xprt,
947 put_cred(xprtdata.cred);
949 clp = nfs4_set_ds_client(mds_srv,
950 (struct sockaddr *)&da->da_addr,
952 da->da_transport, timeo,
953 retrans, minor_version);
957 status = nfs4_init_ds_session(clp,
958 mds_srv->nfs_client->cl_lease_time);
969 status = PTR_ERR(clp);
974 WRITE_ONCE(ds->ds_clp, clp);
975 dprintk("%s [new] addr: %s\n", __func__, ds->ds_remotestr);
981 * Create an rpc connection to the nfs4_pnfs_ds data server.
982 * Currently only supports IPv4 and IPv6 addresses.
983 * If connection fails, make devid unavailable and return a -errno.
985 int nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds,
986 struct nfs4_deviceid_node *devid, unsigned int timeo,
987 unsigned int retrans, u32 version, u32 minor_version)
992 err = nfs4_wait_ds_connect(ds);
993 if (err || ds->ds_clp)
995 if (nfs4_test_deviceid_unavailable(devid))
997 } while (test_and_set_bit(NFS4DS_CONNECTING, &ds->ds_state) != 0);
1004 err = _nfs4_pnfs_v3_ds_connect(mds_srv, ds, timeo, retrans);
1007 err = _nfs4_pnfs_v4_ds_connect(mds_srv, ds, timeo, retrans,
1011 dprintk("%s: unsupported DS version %d\n", __func__, version);
1012 err = -EPROTONOSUPPORT;
1016 nfs4_clear_ds_conn_bit(ds);
1019 * At this point the ds->ds_clp should be ready, but it might have
1023 if (!ds->ds_clp || !nfs_client_init_is_complete(ds->ds_clp)) {
1024 WARN_ON_ONCE(ds->ds_clp ||
1025 !nfs4_test_deviceid_unavailable(devid));
1028 err = nfs_client_init_status(ds->ds_clp);
1033 EXPORT_SYMBOL_GPL(nfs4_pnfs_ds_connect);
1036 * Currently only supports ipv4, ipv6 and one multi-path address.
1038 struct nfs4_pnfs_ds_addr *
1039 nfs4_decode_mp_ds_addr(struct net *net, struct xdr_stream *xdr, gfp_t gfp_flags)
1041 struct nfs4_pnfs_ds_addr *da = NULL;
1042 char *buf, *portstr;
1048 char *startsep = "";
1053 nlen = xdr_stream_decode_string_dup(xdr, &netid, XDR_MAX_NETOBJ,
1055 if (unlikely(nlen < 0))
1058 /* r_addr: ip/ip6addr with port in dec octets - see RFC 5665 */
1059 /* port is ".ABC.DEF", 8 chars max */
1060 rlen = xdr_stream_decode_string_dup(xdr, &buf, INET6_ADDRSTRLEN +
1061 IPV6_SCOPE_ID_LEN + 8, gfp_flags);
1062 if (unlikely(rlen < 0))
1063 goto out_free_netid;
1065 /* replace port '.' with '-' */
1066 portstr = strrchr(buf, '.');
1068 dprintk("%s: Failed finding expected dot in port\n",
1074 /* find '.' between address and port */
1075 portstr = strrchr(buf, '.');
1077 dprintk("%s: Failed finding expected dot between address and "
1078 "port\n", __func__);
1083 da = nfs4_pnfs_ds_addr_alloc(gfp_flags);
1087 if (!rpc_pton(net, buf, portstr-buf, (struct sockaddr *)&da->da_addr,
1088 sizeof(da->da_addr))) {
1089 dprintk("%s: error parsing address %s\n", __func__, buf);
1094 sscanf(portstr, "%d-%d", &tmp[0], &tmp[1]);
1095 port = htons((tmp[0] << 8) | (tmp[1]));
1097 switch (da->da_addr.ss_family) {
1099 ((struct sockaddr_in *)&da->da_addr)->sin_port = port;
1100 da->da_addrlen = sizeof(struct sockaddr_in);
1104 ((struct sockaddr_in6 *)&da->da_addr)->sin6_port = port;
1105 da->da_addrlen = sizeof(struct sockaddr_in6);
1111 dprintk("%s: unsupported address family: %u\n",
1112 __func__, da->da_addr.ss_family);
1116 da->da_transport = xprt_find_transport_ident(netid);
1117 if (da->da_transport < 0) {
1118 dprintk("%s: ERROR: unknown r_netid \"%s\"\n",
1123 da->da_netid = netid;
1125 /* save human readable address */
1126 len = strlen(startsep) + strlen(buf) + strlen(endsep) + 7;
1127 da->da_remotestr = kzalloc(len, gfp_flags);
1129 /* NULL is ok, only used for dprintk */
1130 if (da->da_remotestr)
1131 snprintf(da->da_remotestr, len, "%s%s%s:%u", startsep,
1132 buf, endsep, ntohs(port));
1134 dprintk("%s: Parsed DS addr %s\n", __func__, da->da_remotestr);
1141 dprintk("%s: Error parsing DS addr: %s\n", __func__, buf);
1148 EXPORT_SYMBOL_GPL(nfs4_decode_mp_ds_addr);
1151 pnfs_layout_mark_request_commit(struct nfs_page *req,
1152 struct pnfs_layout_segment *lseg,
1153 struct nfs_commit_info *cinfo,
1156 struct list_head *list;
1157 struct pnfs_commit_array *array;
1158 struct pnfs_commit_bucket *bucket;
1160 mutex_lock(&NFS_I(cinfo->inode)->commit_mutex);
1161 array = pnfs_lookup_commit_array(cinfo->ds, lseg);
1162 if (!array || !pnfs_is_valid_lseg(lseg))
1164 bucket = &array->buckets[ds_commit_idx];
1165 list = &bucket->written;
1166 /* Non-empty buckets hold a reference on the lseg. That ref
1167 * is normally transferred to the COMMIT call and released
1168 * there. It could also be released if the last req is pulled
1169 * off due to a rewrite, in which case it will be done in
1170 * pnfs_common_clear_request_commit
1173 bucket->lseg = pnfs_get_lseg(lseg);
1174 set_bit(PG_COMMIT_TO_DS, &req->wb_flags);
1175 cinfo->ds->nwritten++;
1177 nfs_request_add_commit_list_locked(req, list, cinfo);
1178 mutex_unlock(&NFS_I(cinfo->inode)->commit_mutex);
1179 nfs_mark_page_unstable(req->wb_page, cinfo);
1182 mutex_unlock(&NFS_I(cinfo->inode)->commit_mutex);
1183 cinfo->completion_ops->resched_write(cinfo, req);
1185 EXPORT_SYMBOL_GPL(pnfs_layout_mark_request_commit);
1188 pnfs_nfs_generic_sync(struct inode *inode, bool datasync)
1192 if (!pnfs_layoutcommit_outstanding(inode))
1194 ret = nfs_commit_inode(inode, FLUSH_SYNC);
1199 return pnfs_layoutcommit_inode(inode, true);
1201 EXPORT_SYMBOL_GPL(pnfs_nfs_generic_sync);