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- // SPDX-License-Identifier: GPL-2.0-only
- /*
- * Module for pnfs flexfile layout driver.
- *
- * Copyright (c) 2014, Primary Data, Inc. All rights reserved.
- *
- * Tao Peng <bergwolf@primarydata.com>
- */
- #include <linux/nfs_fs.h>
- #include <linux/nfs_mount.h>
- #include <linux/nfs_page.h>
- #include <linux/module.h>
- #include <linux/sched/mm.h>
- #include <linux/sunrpc/metrics.h>
- #include "flexfilelayout.h"
- #include "../nfs4session.h"
- #include "../nfs4idmap.h"
- #include "../internal.h"
- #include "../delegation.h"
- #include "../nfs4trace.h"
- #include "../iostat.h"
- #include "../nfs.h"
- #include "../nfs42.h"
- #define NFSDBG_FACILITY NFSDBG_PNFS_LD
- #define FF_LAYOUT_POLL_RETRY_MAX (15*HZ)
- #define FF_LAYOUTRETURN_MAXERR 20
- static unsigned short io_maxretrans;
- static const struct pnfs_commit_ops ff_layout_commit_ops;
- static void ff_layout_read_record_layoutstats_done(struct rpc_task *task,
- struct nfs_pgio_header *hdr);
- static int ff_layout_mirror_prepare_stats(struct pnfs_layout_hdr *lo,
- struct nfs42_layoutstat_devinfo *devinfo,
- int dev_limit);
- static void ff_layout_encode_ff_layoutupdate(struct xdr_stream *xdr,
- const struct nfs42_layoutstat_devinfo *devinfo,
- struct nfs4_ff_layout_mirror *mirror);
- static struct pnfs_layout_hdr *
- ff_layout_alloc_layout_hdr(struct inode *inode, gfp_t gfp_flags)
- {
- struct nfs4_flexfile_layout *ffl;
- ffl = kzalloc(sizeof(*ffl), gfp_flags);
- if (ffl) {
- pnfs_init_ds_commit_info(&ffl->commit_info);
- INIT_LIST_HEAD(&ffl->error_list);
- INIT_LIST_HEAD(&ffl->mirrors);
- ffl->last_report_time = ktime_get();
- ffl->commit_info.ops = &ff_layout_commit_ops;
- return &ffl->generic_hdr;
- } else
- return NULL;
- }
- static void
- ff_layout_free_layout_hdr(struct pnfs_layout_hdr *lo)
- {
- struct nfs4_flexfile_layout *ffl = FF_LAYOUT_FROM_HDR(lo);
- struct nfs4_ff_layout_ds_err *err, *n;
- list_for_each_entry_safe(err, n, &ffl->error_list, list) {
- list_del(&err->list);
- kfree(err);
- }
- kfree_rcu(ffl, generic_hdr.plh_rcu);
- }
- static int decode_pnfs_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
- {
- __be32 *p;
- p = xdr_inline_decode(xdr, NFS4_STATEID_SIZE);
- if (unlikely(p == NULL))
- return -ENOBUFS;
- stateid->type = NFS4_PNFS_DS_STATEID_TYPE;
- memcpy(stateid->data, p, NFS4_STATEID_SIZE);
- dprintk("%s: stateid id= [%x%x%x%x]\n", __func__,
- p[0], p[1], p[2], p[3]);
- return 0;
- }
- static int decode_deviceid(struct xdr_stream *xdr, struct nfs4_deviceid *devid)
- {
- __be32 *p;
- p = xdr_inline_decode(xdr, NFS4_DEVICEID4_SIZE);
- if (unlikely(!p))
- return -ENOBUFS;
- memcpy(devid, p, NFS4_DEVICEID4_SIZE);
- nfs4_print_deviceid(devid);
- return 0;
- }
- static int decode_nfs_fh(struct xdr_stream *xdr, struct nfs_fh *fh)
- {
- __be32 *p;
- p = xdr_inline_decode(xdr, 4);
- if (unlikely(!p))
- return -ENOBUFS;
- fh->size = be32_to_cpup(p++);
- if (fh->size > NFS_MAXFHSIZE) {
- printk(KERN_ERR "NFS flexfiles: Too big fh received %d\n",
- fh->size);
- return -EOVERFLOW;
- }
- /* fh.data */
- p = xdr_inline_decode(xdr, fh->size);
- if (unlikely(!p))
- return -ENOBUFS;
- memcpy(&fh->data, p, fh->size);
- dprintk("%s: fh len %d\n", __func__, fh->size);
- return 0;
- }
- /*
- * Currently only stringified uids and gids are accepted.
- * I.e., kerberos is not supported to the DSes, so no pricipals.
- *
- * That means that one common function will suffice, but when
- * principals are added, this should be split to accomodate
- * calls to both nfs_map_name_to_uid() and nfs_map_group_to_gid().
- */
- static int
- decode_name(struct xdr_stream *xdr, u32 *id)
- {
- __be32 *p;
- int len;
- /* opaque_length(4)*/
- p = xdr_inline_decode(xdr, 4);
- if (unlikely(!p))
- return -ENOBUFS;
- len = be32_to_cpup(p++);
- if (len < 0)
- return -EINVAL;
- dprintk("%s: len %u\n", __func__, len);
- /* opaque body */
- p = xdr_inline_decode(xdr, len);
- if (unlikely(!p))
- return -ENOBUFS;
- if (!nfs_map_string_to_numeric((char *)p, len, id))
- return -EINVAL;
- return 0;
- }
- static bool ff_mirror_match_fh(const struct nfs4_ff_layout_mirror *m1,
- const struct nfs4_ff_layout_mirror *m2)
- {
- int i, j;
- if (m1->fh_versions_cnt != m2->fh_versions_cnt)
- return false;
- for (i = 0; i < m1->fh_versions_cnt; i++) {
- bool found_fh = false;
- for (j = 0; j < m2->fh_versions_cnt; j++) {
- if (nfs_compare_fh(&m1->fh_versions[i],
- &m2->fh_versions[j]) == 0) {
- found_fh = true;
- break;
- }
- }
- if (!found_fh)
- return false;
- }
- return true;
- }
- static struct nfs4_ff_layout_mirror *
- ff_layout_add_mirror(struct pnfs_layout_hdr *lo,
- struct nfs4_ff_layout_mirror *mirror)
- {
- struct nfs4_flexfile_layout *ff_layout = FF_LAYOUT_FROM_HDR(lo);
- struct nfs4_ff_layout_mirror *pos;
- struct inode *inode = lo->plh_inode;
- spin_lock(&inode->i_lock);
- list_for_each_entry(pos, &ff_layout->mirrors, mirrors) {
- if (memcmp(&mirror->devid, &pos->devid, sizeof(pos->devid)) != 0)
- continue;
- if (!ff_mirror_match_fh(mirror, pos))
- continue;
- if (refcount_inc_not_zero(&pos->ref)) {
- spin_unlock(&inode->i_lock);
- return pos;
- }
- }
- list_add(&mirror->mirrors, &ff_layout->mirrors);
- mirror->layout = lo;
- spin_unlock(&inode->i_lock);
- return mirror;
- }
- static void
- ff_layout_remove_mirror(struct nfs4_ff_layout_mirror *mirror)
- {
- struct inode *inode;
- if (mirror->layout == NULL)
- return;
- inode = mirror->layout->plh_inode;
- spin_lock(&inode->i_lock);
- list_del(&mirror->mirrors);
- spin_unlock(&inode->i_lock);
- mirror->layout = NULL;
- }
- static struct nfs4_ff_layout_mirror *ff_layout_alloc_mirror(gfp_t gfp_flags)
- {
- struct nfs4_ff_layout_mirror *mirror;
- mirror = kzalloc(sizeof(*mirror), gfp_flags);
- if (mirror != NULL) {
- spin_lock_init(&mirror->lock);
- refcount_set(&mirror->ref, 1);
- INIT_LIST_HEAD(&mirror->mirrors);
- }
- return mirror;
- }
- static void ff_layout_free_mirror(struct nfs4_ff_layout_mirror *mirror)
- {
- const struct cred *cred;
- ff_layout_remove_mirror(mirror);
- kfree(mirror->fh_versions);
- cred = rcu_access_pointer(mirror->ro_cred);
- put_cred(cred);
- cred = rcu_access_pointer(mirror->rw_cred);
- put_cred(cred);
- nfs4_ff_layout_put_deviceid(mirror->mirror_ds);
- kfree(mirror);
- }
- static void ff_layout_put_mirror(struct nfs4_ff_layout_mirror *mirror)
- {
- if (mirror != NULL && refcount_dec_and_test(&mirror->ref))
- ff_layout_free_mirror(mirror);
- }
- static void ff_layout_free_mirror_array(struct nfs4_ff_layout_segment *fls)
- {
- u32 i;
- for (i = 0; i < fls->mirror_array_cnt; i++)
- ff_layout_put_mirror(fls->mirror_array[i]);
- }
- static void _ff_layout_free_lseg(struct nfs4_ff_layout_segment *fls)
- {
- if (fls) {
- ff_layout_free_mirror_array(fls);
- kfree(fls);
- }
- }
- static bool
- ff_lseg_match_mirrors(struct pnfs_layout_segment *l1,
- struct pnfs_layout_segment *l2)
- {
- const struct nfs4_ff_layout_segment *fl1 = FF_LAYOUT_LSEG(l1);
- const struct nfs4_ff_layout_segment *fl2 = FF_LAYOUT_LSEG(l1);
- u32 i;
- if (fl1->mirror_array_cnt != fl2->mirror_array_cnt)
- return false;
- for (i = 0; i < fl1->mirror_array_cnt; i++) {
- if (fl1->mirror_array[i] != fl2->mirror_array[i])
- return false;
- }
- return true;
- }
- static bool
- ff_lseg_range_is_after(const struct pnfs_layout_range *l1,
- const struct pnfs_layout_range *l2)
- {
- u64 end1, end2;
- if (l1->iomode != l2->iomode)
- return l1->iomode != IOMODE_READ;
- end1 = pnfs_calc_offset_end(l1->offset, l1->length);
- end2 = pnfs_calc_offset_end(l2->offset, l2->length);
- if (end1 < l2->offset)
- return false;
- if (end2 < l1->offset)
- return true;
- return l2->offset <= l1->offset;
- }
- static bool
- ff_lseg_merge(struct pnfs_layout_segment *new,
- struct pnfs_layout_segment *old)
- {
- u64 new_end, old_end;
- if (test_bit(NFS_LSEG_LAYOUTRETURN, &old->pls_flags))
- return false;
- if (new->pls_range.iomode != old->pls_range.iomode)
- return false;
- old_end = pnfs_calc_offset_end(old->pls_range.offset,
- old->pls_range.length);
- if (old_end < new->pls_range.offset)
- return false;
- new_end = pnfs_calc_offset_end(new->pls_range.offset,
- new->pls_range.length);
- if (new_end < old->pls_range.offset)
- return false;
- if (!ff_lseg_match_mirrors(new, old))
- return false;
- /* Mergeable: copy info from 'old' to 'new' */
- if (new_end < old_end)
- new_end = old_end;
- if (new->pls_range.offset < old->pls_range.offset)
- new->pls_range.offset = old->pls_range.offset;
- new->pls_range.length = pnfs_calc_offset_length(new->pls_range.offset,
- new_end);
- if (test_bit(NFS_LSEG_ROC, &old->pls_flags))
- set_bit(NFS_LSEG_ROC, &new->pls_flags);
- return true;
- }
- static void
- ff_layout_add_lseg(struct pnfs_layout_hdr *lo,
- struct pnfs_layout_segment *lseg,
- struct list_head *free_me)
- {
- pnfs_generic_layout_insert_lseg(lo, lseg,
- ff_lseg_range_is_after,
- ff_lseg_merge,
- free_me);
- }
- static void ff_layout_sort_mirrors(struct nfs4_ff_layout_segment *fls)
- {
- int i, j;
- for (i = 0; i < fls->mirror_array_cnt - 1; i++) {
- for (j = i + 1; j < fls->mirror_array_cnt; j++)
- if (fls->mirror_array[i]->efficiency <
- fls->mirror_array[j]->efficiency)
- swap(fls->mirror_array[i],
- fls->mirror_array[j]);
- }
- }
- static struct pnfs_layout_segment *
- ff_layout_alloc_lseg(struct pnfs_layout_hdr *lh,
- struct nfs4_layoutget_res *lgr,
- gfp_t gfp_flags)
- {
- struct pnfs_layout_segment *ret;
- struct nfs4_ff_layout_segment *fls = NULL;
- struct xdr_stream stream;
- struct xdr_buf buf;
- struct page *scratch;
- u64 stripe_unit;
- u32 mirror_array_cnt;
- __be32 *p;
- int i, rc;
- dprintk("--> %s\n", __func__);
- scratch = alloc_page(gfp_flags);
- if (!scratch)
- return ERR_PTR(-ENOMEM);
- xdr_init_decode_pages(&stream, &buf, lgr->layoutp->pages,
- lgr->layoutp->len);
- xdr_set_scratch_buffer(&stream, page_address(scratch), PAGE_SIZE);
- /* stripe unit and mirror_array_cnt */
- rc = -EIO;
- p = xdr_inline_decode(&stream, 8 + 4);
- if (!p)
- goto out_err_free;
- p = xdr_decode_hyper(p, &stripe_unit);
- mirror_array_cnt = be32_to_cpup(p++);
- dprintk("%s: stripe_unit=%llu mirror_array_cnt=%u\n", __func__,
- stripe_unit, mirror_array_cnt);
- if (mirror_array_cnt > NFS4_FLEXFILE_LAYOUT_MAX_MIRROR_CNT ||
- mirror_array_cnt == 0)
- goto out_err_free;
- rc = -ENOMEM;
- fls = kzalloc(struct_size(fls, mirror_array, mirror_array_cnt),
- gfp_flags);
- if (!fls)
- goto out_err_free;
- fls->mirror_array_cnt = mirror_array_cnt;
- fls->stripe_unit = stripe_unit;
- for (i = 0; i < fls->mirror_array_cnt; i++) {
- struct nfs4_ff_layout_mirror *mirror;
- struct cred *kcred;
- const struct cred __rcu *cred;
- kuid_t uid;
- kgid_t gid;
- u32 ds_count, fh_count, id;
- int j;
- rc = -EIO;
- p = xdr_inline_decode(&stream, 4);
- if (!p)
- goto out_err_free;
- ds_count = be32_to_cpup(p);
- /* FIXME: allow for striping? */
- if (ds_count != 1)
- goto out_err_free;
- fls->mirror_array[i] = ff_layout_alloc_mirror(gfp_flags);
- if (fls->mirror_array[i] == NULL) {
- rc = -ENOMEM;
- goto out_err_free;
- }
- fls->mirror_array[i]->ds_count = ds_count;
- /* deviceid */
- rc = decode_deviceid(&stream, &fls->mirror_array[i]->devid);
- if (rc)
- goto out_err_free;
- /* efficiency */
- rc = -EIO;
- p = xdr_inline_decode(&stream, 4);
- if (!p)
- goto out_err_free;
- fls->mirror_array[i]->efficiency = be32_to_cpup(p);
- /* stateid */
- rc = decode_pnfs_stateid(&stream, &fls->mirror_array[i]->stateid);
- if (rc)
- goto out_err_free;
- /* fh */
- rc = -EIO;
- p = xdr_inline_decode(&stream, 4);
- if (!p)
- goto out_err_free;
- fh_count = be32_to_cpup(p);
- fls->mirror_array[i]->fh_versions =
- kcalloc(fh_count, sizeof(struct nfs_fh),
- gfp_flags);
- if (fls->mirror_array[i]->fh_versions == NULL) {
- rc = -ENOMEM;
- goto out_err_free;
- }
- for (j = 0; j < fh_count; j++) {
- rc = decode_nfs_fh(&stream,
- &fls->mirror_array[i]->fh_versions[j]);
- if (rc)
- goto out_err_free;
- }
- fls->mirror_array[i]->fh_versions_cnt = fh_count;
- /* user */
- rc = decode_name(&stream, &id);
- if (rc)
- goto out_err_free;
- uid = make_kuid(&init_user_ns, id);
- /* group */
- rc = decode_name(&stream, &id);
- if (rc)
- goto out_err_free;
- gid = make_kgid(&init_user_ns, id);
- if (gfp_flags & __GFP_FS)
- kcred = prepare_kernel_cred(NULL);
- else {
- unsigned int nofs_flags = memalloc_nofs_save();
- kcred = prepare_kernel_cred(NULL);
- memalloc_nofs_restore(nofs_flags);
- }
- rc = -ENOMEM;
- if (!kcred)
- goto out_err_free;
- kcred->fsuid = uid;
- kcred->fsgid = gid;
- cred = RCU_INITIALIZER(kcred);
- if (lgr->range.iomode == IOMODE_READ)
- rcu_assign_pointer(fls->mirror_array[i]->ro_cred, cred);
- else
- rcu_assign_pointer(fls->mirror_array[i]->rw_cred, cred);
- mirror = ff_layout_add_mirror(lh, fls->mirror_array[i]);
- if (mirror != fls->mirror_array[i]) {
- /* swap cred ptrs so free_mirror will clean up old */
- if (lgr->range.iomode == IOMODE_READ) {
- cred = xchg(&mirror->ro_cred, cred);
- rcu_assign_pointer(fls->mirror_array[i]->ro_cred, cred);
- } else {
- cred = xchg(&mirror->rw_cred, cred);
- rcu_assign_pointer(fls->mirror_array[i]->rw_cred, cred);
- }
- ff_layout_free_mirror(fls->mirror_array[i]);
- fls->mirror_array[i] = mirror;
- }
- dprintk("%s: iomode %s uid %u gid %u\n", __func__,
- lgr->range.iomode == IOMODE_READ ? "READ" : "RW",
- from_kuid(&init_user_ns, uid),
- from_kgid(&init_user_ns, gid));
- }
- p = xdr_inline_decode(&stream, 4);
- if (!p)
- goto out_sort_mirrors;
- fls->flags = be32_to_cpup(p);
- p = xdr_inline_decode(&stream, 4);
- if (!p)
- goto out_sort_mirrors;
- for (i=0; i < fls->mirror_array_cnt; i++)
- fls->mirror_array[i]->report_interval = be32_to_cpup(p);
- out_sort_mirrors:
- ff_layout_sort_mirrors(fls);
- ret = &fls->generic_hdr;
- dprintk("<-- %s (success)\n", __func__);
- out_free_page:
- __free_page(scratch);
- return ret;
- out_err_free:
- _ff_layout_free_lseg(fls);
- ret = ERR_PTR(rc);
- dprintk("<-- %s (%d)\n", __func__, rc);
- goto out_free_page;
- }
- static void
- ff_layout_free_lseg(struct pnfs_layout_segment *lseg)
- {
- struct nfs4_ff_layout_segment *fls = FF_LAYOUT_LSEG(lseg);
- dprintk("--> %s\n", __func__);
- if (lseg->pls_range.iomode == IOMODE_RW) {
- struct nfs4_flexfile_layout *ffl;
- struct inode *inode;
- ffl = FF_LAYOUT_FROM_HDR(lseg->pls_layout);
- inode = ffl->generic_hdr.plh_inode;
- spin_lock(&inode->i_lock);
- pnfs_generic_ds_cinfo_release_lseg(&ffl->commit_info, lseg);
- spin_unlock(&inode->i_lock);
- }
- _ff_layout_free_lseg(fls);
- }
- static void
- nfs4_ff_start_busy_timer(struct nfs4_ff_busy_timer *timer, ktime_t now)
- {
- /* first IO request? */
- if (atomic_inc_return(&timer->n_ops) == 1) {
- timer->start_time = now;
- }
- }
- static ktime_t
- nfs4_ff_end_busy_timer(struct nfs4_ff_busy_timer *timer, ktime_t now)
- {
- ktime_t start;
- if (atomic_dec_return(&timer->n_ops) < 0)
- WARN_ON_ONCE(1);
- start = timer->start_time;
- timer->start_time = now;
- return ktime_sub(now, start);
- }
- static bool
- nfs4_ff_layoutstat_start_io(struct nfs4_ff_layout_mirror *mirror,
- struct nfs4_ff_layoutstat *layoutstat,
- ktime_t now)
- {
- s64 report_interval = FF_LAYOUTSTATS_REPORT_INTERVAL;
- struct nfs4_flexfile_layout *ffl = FF_LAYOUT_FROM_HDR(mirror->layout);
- nfs4_ff_start_busy_timer(&layoutstat->busy_timer, now);
- if (!mirror->start_time)
- mirror->start_time = now;
- if (mirror->report_interval != 0)
- report_interval = (s64)mirror->report_interval * 1000LL;
- else if (layoutstats_timer != 0)
- report_interval = (s64)layoutstats_timer * 1000LL;
- if (ktime_to_ms(ktime_sub(now, ffl->last_report_time)) >=
- report_interval) {
- ffl->last_report_time = now;
- return true;
- }
- return false;
- }
- static void
- nfs4_ff_layout_stat_io_update_requested(struct nfs4_ff_layoutstat *layoutstat,
- __u64 requested)
- {
- struct nfs4_ff_io_stat *iostat = &layoutstat->io_stat;
- iostat->ops_requested++;
- iostat->bytes_requested += requested;
- }
- static void
- nfs4_ff_layout_stat_io_update_completed(struct nfs4_ff_layoutstat *layoutstat,
- __u64 requested,
- __u64 completed,
- ktime_t time_completed,
- ktime_t time_started)
- {
- struct nfs4_ff_io_stat *iostat = &layoutstat->io_stat;
- ktime_t completion_time = ktime_sub(time_completed, time_started);
- ktime_t timer;
- iostat->ops_completed++;
- iostat->bytes_completed += completed;
- iostat->bytes_not_delivered += requested - completed;
- timer = nfs4_ff_end_busy_timer(&layoutstat->busy_timer, time_completed);
- iostat->total_busy_time =
- ktime_add(iostat->total_busy_time, timer);
- iostat->aggregate_completion_time =
- ktime_add(iostat->aggregate_completion_time,
- completion_time);
- }
- static void
- nfs4_ff_layout_stat_io_start_read(struct inode *inode,
- struct nfs4_ff_layout_mirror *mirror,
- __u64 requested, ktime_t now)
- {
- bool report;
- spin_lock(&mirror->lock);
- report = nfs4_ff_layoutstat_start_io(mirror, &mirror->read_stat, now);
- nfs4_ff_layout_stat_io_update_requested(&mirror->read_stat, requested);
- set_bit(NFS4_FF_MIRROR_STAT_AVAIL, &mirror->flags);
- spin_unlock(&mirror->lock);
- if (report)
- pnfs_report_layoutstat(inode, GFP_KERNEL);
- }
- static void
- nfs4_ff_layout_stat_io_end_read(struct rpc_task *task,
- struct nfs4_ff_layout_mirror *mirror,
- __u64 requested,
- __u64 completed)
- {
- spin_lock(&mirror->lock);
- nfs4_ff_layout_stat_io_update_completed(&mirror->read_stat,
- requested, completed,
- ktime_get(), task->tk_start);
- set_bit(NFS4_FF_MIRROR_STAT_AVAIL, &mirror->flags);
- spin_unlock(&mirror->lock);
- }
- static void
- nfs4_ff_layout_stat_io_start_write(struct inode *inode,
- struct nfs4_ff_layout_mirror *mirror,
- __u64 requested, ktime_t now)
- {
- bool report;
- spin_lock(&mirror->lock);
- report = nfs4_ff_layoutstat_start_io(mirror , &mirror->write_stat, now);
- nfs4_ff_layout_stat_io_update_requested(&mirror->write_stat, requested);
- set_bit(NFS4_FF_MIRROR_STAT_AVAIL, &mirror->flags);
- spin_unlock(&mirror->lock);
- if (report)
- pnfs_report_layoutstat(inode, GFP_NOIO);
- }
- static void
- nfs4_ff_layout_stat_io_end_write(struct rpc_task *task,
- struct nfs4_ff_layout_mirror *mirror,
- __u64 requested,
- __u64 completed,
- enum nfs3_stable_how committed)
- {
- if (committed == NFS_UNSTABLE)
- requested = completed = 0;
- spin_lock(&mirror->lock);
- nfs4_ff_layout_stat_io_update_completed(&mirror->write_stat,
- requested, completed, ktime_get(), task->tk_start);
- set_bit(NFS4_FF_MIRROR_STAT_AVAIL, &mirror->flags);
- spin_unlock(&mirror->lock);
- }
- static void
- ff_layout_mark_ds_unreachable(struct pnfs_layout_segment *lseg, u32 idx)
- {
- struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx);
- if (devid)
- nfs4_mark_deviceid_unavailable(devid);
- }
- static void
- ff_layout_mark_ds_reachable(struct pnfs_layout_segment *lseg, u32 idx)
- {
- struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx);
- if (devid)
- nfs4_mark_deviceid_available(devid);
- }
- static struct nfs4_pnfs_ds *
- ff_layout_choose_ds_for_read(struct pnfs_layout_segment *lseg,
- u32 start_idx, u32 *best_idx,
- bool check_device)
- {
- struct nfs4_ff_layout_segment *fls = FF_LAYOUT_LSEG(lseg);
- struct nfs4_ff_layout_mirror *mirror;
- struct nfs4_pnfs_ds *ds;
- bool fail_return = false;
- u32 idx;
- /* mirrors are initially sorted by efficiency */
- for (idx = start_idx; idx < fls->mirror_array_cnt; idx++) {
- if (idx+1 == fls->mirror_array_cnt)
- fail_return = !check_device;
- mirror = FF_LAYOUT_COMP(lseg, idx);
- ds = nfs4_ff_layout_prepare_ds(lseg, mirror, fail_return);
- if (!ds)
- continue;
- if (check_device &&
- nfs4_test_deviceid_unavailable(&mirror->mirror_ds->id_node))
- continue;
- *best_idx = idx;
- return ds;
- }
- return NULL;
- }
- static struct nfs4_pnfs_ds *
- ff_layout_choose_any_ds_for_read(struct pnfs_layout_segment *lseg,
- u32 start_idx, u32 *best_idx)
- {
- return ff_layout_choose_ds_for_read(lseg, start_idx, best_idx, false);
- }
- static struct nfs4_pnfs_ds *
- ff_layout_choose_valid_ds_for_read(struct pnfs_layout_segment *lseg,
- u32 start_idx, u32 *best_idx)
- {
- return ff_layout_choose_ds_for_read(lseg, start_idx, best_idx, true);
- }
- static struct nfs4_pnfs_ds *
- ff_layout_choose_best_ds_for_read(struct pnfs_layout_segment *lseg,
- u32 start_idx, u32 *best_idx)
- {
- struct nfs4_pnfs_ds *ds;
- ds = ff_layout_choose_valid_ds_for_read(lseg, start_idx, best_idx);
- if (ds)
- return ds;
- return ff_layout_choose_any_ds_for_read(lseg, start_idx, best_idx);
- }
- static struct nfs4_pnfs_ds *
- ff_layout_get_ds_for_read(struct nfs_pageio_descriptor *pgio,
- u32 *best_idx)
- {
- struct pnfs_layout_segment *lseg = pgio->pg_lseg;
- struct nfs4_pnfs_ds *ds;
- ds = ff_layout_choose_best_ds_for_read(lseg, pgio->pg_mirror_idx,
- best_idx);
- if (ds || !pgio->pg_mirror_idx)
- return ds;
- return ff_layout_choose_best_ds_for_read(lseg, 0, best_idx);
- }
- static void
- ff_layout_pg_get_read(struct nfs_pageio_descriptor *pgio,
- struct nfs_page *req,
- bool strict_iomode)
- {
- pnfs_put_lseg(pgio->pg_lseg);
- pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
- nfs_req_openctx(req),
- req_offset(req),
- req->wb_bytes,
- IOMODE_READ,
- strict_iomode,
- GFP_KERNEL);
- if (IS_ERR(pgio->pg_lseg)) {
- pgio->pg_error = PTR_ERR(pgio->pg_lseg);
- pgio->pg_lseg = NULL;
- }
- }
- static void
- ff_layout_pg_check_layout(struct nfs_pageio_descriptor *pgio,
- struct nfs_page *req)
- {
- pnfs_generic_pg_check_layout(pgio);
- pnfs_generic_pg_check_range(pgio, req);
- }
- static void
- ff_layout_pg_init_read(struct nfs_pageio_descriptor *pgio,
- struct nfs_page *req)
- {
- struct nfs_pgio_mirror *pgm;
- struct nfs4_ff_layout_mirror *mirror;
- struct nfs4_pnfs_ds *ds;
- u32 ds_idx;
- retry:
- ff_layout_pg_check_layout(pgio, req);
- /* Use full layout for now */
- if (!pgio->pg_lseg) {
- ff_layout_pg_get_read(pgio, req, false);
- if (!pgio->pg_lseg)
- goto out_nolseg;
- }
- if (ff_layout_avoid_read_on_rw(pgio->pg_lseg)) {
- ff_layout_pg_get_read(pgio, req, true);
- if (!pgio->pg_lseg)
- goto out_nolseg;
- }
- ds = ff_layout_get_ds_for_read(pgio, &ds_idx);
- if (!ds) {
- if (!ff_layout_no_fallback_to_mds(pgio->pg_lseg))
- goto out_mds;
- pnfs_generic_pg_cleanup(pgio);
- /* Sleep for 1 second before retrying */
- ssleep(1);
- goto retry;
- }
- mirror = FF_LAYOUT_COMP(pgio->pg_lseg, ds_idx);
- pgm = &pgio->pg_mirrors[0];
- pgm->pg_bsize = mirror->mirror_ds->ds_versions[0].rsize;
- pgio->pg_mirror_idx = ds_idx;
- if (NFS_SERVER(pgio->pg_inode)->flags &
- (NFS_MOUNT_SOFT|NFS_MOUNT_SOFTERR))
- pgio->pg_maxretrans = io_maxretrans;
- return;
- out_nolseg:
- if (pgio->pg_error < 0)
- return;
- out_mds:
- trace_pnfs_mds_fallback_pg_init_read(pgio->pg_inode,
- 0, NFS4_MAX_UINT64, IOMODE_READ,
- NFS_I(pgio->pg_inode)->layout,
- pgio->pg_lseg);
- pgio->pg_maxretrans = 0;
- nfs_pageio_reset_read_mds(pgio);
- }
- static void
- ff_layout_pg_init_write(struct nfs_pageio_descriptor *pgio,
- struct nfs_page *req)
- {
- struct nfs4_ff_layout_mirror *mirror;
- struct nfs_pgio_mirror *pgm;
- struct nfs4_pnfs_ds *ds;
- u32 i;
- retry:
- ff_layout_pg_check_layout(pgio, req);
- if (!pgio->pg_lseg) {
- pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
- nfs_req_openctx(req),
- req_offset(req),
- req->wb_bytes,
- IOMODE_RW,
- false,
- GFP_NOFS);
- if (IS_ERR(pgio->pg_lseg)) {
- pgio->pg_error = PTR_ERR(pgio->pg_lseg);
- pgio->pg_lseg = NULL;
- return;
- }
- }
- /* If no lseg, fall back to write through mds */
- if (pgio->pg_lseg == NULL)
- goto out_mds;
- /* Use a direct mapping of ds_idx to pgio mirror_idx */
- if (pgio->pg_mirror_count != FF_LAYOUT_MIRROR_COUNT(pgio->pg_lseg))
- goto out_eagain;
- for (i = 0; i < pgio->pg_mirror_count; i++) {
- mirror = FF_LAYOUT_COMP(pgio->pg_lseg, i);
- ds = nfs4_ff_layout_prepare_ds(pgio->pg_lseg, mirror, true);
- if (!ds) {
- if (!ff_layout_no_fallback_to_mds(pgio->pg_lseg))
- goto out_mds;
- pnfs_generic_pg_cleanup(pgio);
- /* Sleep for 1 second before retrying */
- ssleep(1);
- goto retry;
- }
- pgm = &pgio->pg_mirrors[i];
- pgm->pg_bsize = mirror->mirror_ds->ds_versions[0].wsize;
- }
- if (NFS_SERVER(pgio->pg_inode)->flags &
- (NFS_MOUNT_SOFT|NFS_MOUNT_SOFTERR))
- pgio->pg_maxretrans = io_maxretrans;
- return;
- out_eagain:
- pnfs_generic_pg_cleanup(pgio);
- pgio->pg_error = -EAGAIN;
- return;
- out_mds:
- trace_pnfs_mds_fallback_pg_init_write(pgio->pg_inode,
- 0, NFS4_MAX_UINT64, IOMODE_RW,
- NFS_I(pgio->pg_inode)->layout,
- pgio->pg_lseg);
- pgio->pg_maxretrans = 0;
- nfs_pageio_reset_write_mds(pgio);
- pgio->pg_error = -EAGAIN;
- }
- static unsigned int
- ff_layout_pg_get_mirror_count_write(struct nfs_pageio_descriptor *pgio,
- struct nfs_page *req)
- {
- if (!pgio->pg_lseg) {
- pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
- nfs_req_openctx(req),
- req_offset(req),
- req->wb_bytes,
- IOMODE_RW,
- false,
- GFP_NOFS);
- if (IS_ERR(pgio->pg_lseg)) {
- pgio->pg_error = PTR_ERR(pgio->pg_lseg);
- pgio->pg_lseg = NULL;
- goto out;
- }
- }
- if (pgio->pg_lseg)
- return FF_LAYOUT_MIRROR_COUNT(pgio->pg_lseg);
- trace_pnfs_mds_fallback_pg_get_mirror_count(pgio->pg_inode,
- 0, NFS4_MAX_UINT64, IOMODE_RW,
- NFS_I(pgio->pg_inode)->layout,
- pgio->pg_lseg);
- /* no lseg means that pnfs is not in use, so no mirroring here */
- nfs_pageio_reset_write_mds(pgio);
- out:
- return 1;
- }
- static u32
- ff_layout_pg_set_mirror_write(struct nfs_pageio_descriptor *desc, u32 idx)
- {
- u32 old = desc->pg_mirror_idx;
- desc->pg_mirror_idx = idx;
- return old;
- }
- static struct nfs_pgio_mirror *
- ff_layout_pg_get_mirror_write(struct nfs_pageio_descriptor *desc, u32 idx)
- {
- return &desc->pg_mirrors[idx];
- }
- static const struct nfs_pageio_ops ff_layout_pg_read_ops = {
- .pg_init = ff_layout_pg_init_read,
- .pg_test = pnfs_generic_pg_test,
- .pg_doio = pnfs_generic_pg_readpages,
- .pg_cleanup = pnfs_generic_pg_cleanup,
- };
- static const struct nfs_pageio_ops ff_layout_pg_write_ops = {
- .pg_init = ff_layout_pg_init_write,
- .pg_test = pnfs_generic_pg_test,
- .pg_doio = pnfs_generic_pg_writepages,
- .pg_get_mirror_count = ff_layout_pg_get_mirror_count_write,
- .pg_cleanup = pnfs_generic_pg_cleanup,
- .pg_get_mirror = ff_layout_pg_get_mirror_write,
- .pg_set_mirror = ff_layout_pg_set_mirror_write,
- };
- static void ff_layout_reset_write(struct nfs_pgio_header *hdr, bool retry_pnfs)
- {
- struct rpc_task *task = &hdr->task;
- pnfs_layoutcommit_inode(hdr->inode, false);
- if (retry_pnfs) {
- dprintk("%s Reset task %5u for i/o through pNFS "
- "(req %s/%llu, %u bytes @ offset %llu)\n", __func__,
- hdr->task.tk_pid,
- hdr->inode->i_sb->s_id,
- (unsigned long long)NFS_FILEID(hdr->inode),
- hdr->args.count,
- (unsigned long long)hdr->args.offset);
- hdr->completion_ops->reschedule_io(hdr);
- return;
- }
- if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) {
- dprintk("%s Reset task %5u for i/o through MDS "
- "(req %s/%llu, %u bytes @ offset %llu)\n", __func__,
- hdr->task.tk_pid,
- hdr->inode->i_sb->s_id,
- (unsigned long long)NFS_FILEID(hdr->inode),
- hdr->args.count,
- (unsigned long long)hdr->args.offset);
- trace_pnfs_mds_fallback_write_done(hdr->inode,
- hdr->args.offset, hdr->args.count,
- IOMODE_RW, NFS_I(hdr->inode)->layout,
- hdr->lseg);
- task->tk_status = pnfs_write_done_resend_to_mds(hdr);
- }
- }
- static void ff_layout_resend_pnfs_read(struct nfs_pgio_header *hdr)
- {
- u32 idx = hdr->pgio_mirror_idx + 1;
- u32 new_idx = 0;
- if (ff_layout_choose_any_ds_for_read(hdr->lseg, idx, &new_idx))
- ff_layout_send_layouterror(hdr->lseg);
- else
- pnfs_error_mark_layout_for_return(hdr->inode, hdr->lseg);
- pnfs_read_resend_pnfs(hdr, new_idx);
- }
- static void ff_layout_reset_read(struct nfs_pgio_header *hdr)
- {
- struct rpc_task *task = &hdr->task;
- pnfs_layoutcommit_inode(hdr->inode, false);
- pnfs_error_mark_layout_for_return(hdr->inode, hdr->lseg);
- if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) {
- dprintk("%s Reset task %5u for i/o through MDS "
- "(req %s/%llu, %u bytes @ offset %llu)\n", __func__,
- hdr->task.tk_pid,
- hdr->inode->i_sb->s_id,
- (unsigned long long)NFS_FILEID(hdr->inode),
- hdr->args.count,
- (unsigned long long)hdr->args.offset);
- trace_pnfs_mds_fallback_read_done(hdr->inode,
- hdr->args.offset, hdr->args.count,
- IOMODE_READ, NFS_I(hdr->inode)->layout,
- hdr->lseg);
- task->tk_status = pnfs_read_done_resend_to_mds(hdr);
- }
- }
- static int ff_layout_async_handle_error_v4(struct rpc_task *task,
- struct nfs4_state *state,
- struct nfs_client *clp,
- struct pnfs_layout_segment *lseg,
- u32 idx)
- {
- struct pnfs_layout_hdr *lo = lseg->pls_layout;
- struct inode *inode = lo->plh_inode;
- struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx);
- struct nfs4_slot_table *tbl = &clp->cl_session->fc_slot_table;
- switch (task->tk_status) {
- case -NFS4ERR_BADSESSION:
- case -NFS4ERR_BADSLOT:
- case -NFS4ERR_BAD_HIGH_SLOT:
- case -NFS4ERR_DEADSESSION:
- case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
- case -NFS4ERR_SEQ_FALSE_RETRY:
- case -NFS4ERR_SEQ_MISORDERED:
- dprintk("%s ERROR %d, Reset session. Exchangeid "
- "flags 0x%x\n", __func__, task->tk_status,
- clp->cl_exchange_flags);
- nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
- break;
- case -NFS4ERR_DELAY:
- case -NFS4ERR_GRACE:
- rpc_delay(task, FF_LAYOUT_POLL_RETRY_MAX);
- break;
- case -NFS4ERR_RETRY_UNCACHED_REP:
- break;
- /* Invalidate Layout errors */
- case -NFS4ERR_PNFS_NO_LAYOUT:
- case -ESTALE: /* mapped NFS4ERR_STALE */
- case -EBADHANDLE: /* mapped NFS4ERR_BADHANDLE */
- case -EISDIR: /* mapped NFS4ERR_ISDIR */
- case -NFS4ERR_FHEXPIRED:
- case -NFS4ERR_WRONG_TYPE:
- dprintk("%s Invalid layout error %d\n", __func__,
- task->tk_status);
- /*
- * Destroy layout so new i/o will get a new layout.
- * Layout will not be destroyed until all current lseg
- * references are put. Mark layout as invalid to resend failed
- * i/o and all i/o waiting on the slot table to the MDS until
- * layout is destroyed and a new valid layout is obtained.
- */
- pnfs_destroy_layout(NFS_I(inode));
- rpc_wake_up(&tbl->slot_tbl_waitq);
- goto reset;
- /* RPC connection errors */
- case -ECONNREFUSED:
- case -EHOSTDOWN:
- case -EHOSTUNREACH:
- case -ENETUNREACH:
- case -EIO:
- case -ETIMEDOUT:
- case -EPIPE:
- dprintk("%s DS connection error %d\n", __func__,
- task->tk_status);
- nfs4_delete_deviceid(devid->ld, devid->nfs_client,
- &devid->deviceid);
- rpc_wake_up(&tbl->slot_tbl_waitq);
- fallthrough;
- default:
- if (ff_layout_avoid_mds_available_ds(lseg))
- return -NFS4ERR_RESET_TO_PNFS;
- reset:
- dprintk("%s Retry through MDS. Error %d\n", __func__,
- task->tk_status);
- return -NFS4ERR_RESET_TO_MDS;
- }
- task->tk_status = 0;
- return -EAGAIN;
- }
- /* Retry all errors through either pNFS or MDS except for -EJUKEBOX */
- static int ff_layout_async_handle_error_v3(struct rpc_task *task,
- struct pnfs_layout_segment *lseg,
- u32 idx)
- {
- struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx);
- switch (task->tk_status) {
- /* File access problems. Don't mark the device as unavailable */
- case -EACCES:
- case -ESTALE:
- case -EISDIR:
- case -EBADHANDLE:
- case -ELOOP:
- case -ENOSPC:
- break;
- case -EJUKEBOX:
- nfs_inc_stats(lseg->pls_layout->plh_inode, NFSIOS_DELAY);
- goto out_retry;
- default:
- dprintk("%s DS connection error %d\n", __func__,
- task->tk_status);
- nfs4_delete_deviceid(devid->ld, devid->nfs_client,
- &devid->deviceid);
- }
- /* FIXME: Need to prevent infinite looping here. */
- return -NFS4ERR_RESET_TO_PNFS;
- out_retry:
- task->tk_status = 0;
- rpc_restart_call_prepare(task);
- rpc_delay(task, NFS_JUKEBOX_RETRY_TIME);
- return -EAGAIN;
- }
- static int ff_layout_async_handle_error(struct rpc_task *task,
- struct nfs4_state *state,
- struct nfs_client *clp,
- struct pnfs_layout_segment *lseg,
- u32 idx)
- {
- int vers = clp->cl_nfs_mod->rpc_vers->number;
- if (task->tk_status >= 0) {
- ff_layout_mark_ds_reachable(lseg, idx);
- return 0;
- }
- /* Handle the case of an invalid layout segment */
- if (!pnfs_is_valid_lseg(lseg))
- return -NFS4ERR_RESET_TO_PNFS;
- switch (vers) {
- case 3:
- return ff_layout_async_handle_error_v3(task, lseg, idx);
- case 4:
- return ff_layout_async_handle_error_v4(task, state, clp,
- lseg, idx);
- default:
- /* should never happen */
- WARN_ON_ONCE(1);
- return 0;
- }
- }
- static void ff_layout_io_track_ds_error(struct pnfs_layout_segment *lseg,
- u32 idx, u64 offset, u64 length,
- u32 *op_status, int opnum, int error)
- {
- struct nfs4_ff_layout_mirror *mirror;
- u32 status = *op_status;
- int err;
- if (status == 0) {
- switch (error) {
- case -ETIMEDOUT:
- case -EPFNOSUPPORT:
- case -EPROTONOSUPPORT:
- case -EOPNOTSUPP:
- case -ECONNREFUSED:
- case -ECONNRESET:
- case -EHOSTDOWN:
- case -EHOSTUNREACH:
- case -ENETUNREACH:
- case -EADDRINUSE:
- case -ENOBUFS:
- case -EPIPE:
- case -EPERM:
- *op_status = status = NFS4ERR_NXIO;
- break;
- case -EACCES:
- *op_status = status = NFS4ERR_ACCESS;
- break;
- default:
- return;
- }
- }
- mirror = FF_LAYOUT_COMP(lseg, idx);
- err = ff_layout_track_ds_error(FF_LAYOUT_FROM_HDR(lseg->pls_layout),
- mirror, offset, length, status, opnum,
- GFP_NOIO);
- switch (status) {
- case NFS4ERR_DELAY:
- case NFS4ERR_GRACE:
- break;
- case NFS4ERR_NXIO:
- ff_layout_mark_ds_unreachable(lseg, idx);
- /*
- * Don't return the layout if this is a read and we still
- * have layouts to try
- */
- if (opnum == OP_READ)
- break;
- fallthrough;
- default:
- pnfs_error_mark_layout_for_return(lseg->pls_layout->plh_inode,
- lseg);
- }
- dprintk("%s: err %d op %d status %u\n", __func__, err, opnum, status);
- }
- /* NFS_PROTO call done callback routines */
- static int ff_layout_read_done_cb(struct rpc_task *task,
- struct nfs_pgio_header *hdr)
- {
- int err;
- if (task->tk_status < 0) {
- ff_layout_io_track_ds_error(hdr->lseg, hdr->pgio_mirror_idx,
- hdr->args.offset, hdr->args.count,
- &hdr->res.op_status, OP_READ,
- task->tk_status);
- trace_ff_layout_read_error(hdr);
- }
- err = ff_layout_async_handle_error(task, hdr->args.context->state,
- hdr->ds_clp, hdr->lseg,
- hdr->pgio_mirror_idx);
- trace_nfs4_pnfs_read(hdr, err);
- clear_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags);
- clear_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags);
- switch (err) {
- case -NFS4ERR_RESET_TO_PNFS:
- set_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags);
- return task->tk_status;
- case -NFS4ERR_RESET_TO_MDS:
- set_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags);
- return task->tk_status;
- case -EAGAIN:
- goto out_eagain;
- }
- return 0;
- out_eagain:
- rpc_restart_call_prepare(task);
- return -EAGAIN;
- }
- static bool
- ff_layout_need_layoutcommit(struct pnfs_layout_segment *lseg)
- {
- return !(FF_LAYOUT_LSEG(lseg)->flags & FF_FLAGS_NO_LAYOUTCOMMIT);
- }
- /*
- * We reference the rpc_cred of the first WRITE that triggers the need for
- * a LAYOUTCOMMIT, and use it to send the layoutcommit compound.
- * rfc5661 is not clear about which credential should be used.
- *
- * Flexlayout client should treat DS replied FILE_SYNC as DATA_SYNC, so
- * to follow http://www.rfc-editor.org/errata_search.php?rfc=5661&eid=2751
- * we always send layoutcommit after DS writes.
- */
- static void
- ff_layout_set_layoutcommit(struct inode *inode,
- struct pnfs_layout_segment *lseg,
- loff_t end_offset)
- {
- if (!ff_layout_need_layoutcommit(lseg))
- return;
- pnfs_set_layoutcommit(inode, lseg, end_offset);
- dprintk("%s inode %lu pls_end_pos %llu\n", __func__, inode->i_ino,
- (unsigned long long) NFS_I(inode)->layout->plh_lwb);
- }
- static void ff_layout_read_record_layoutstats_start(struct rpc_task *task,
- struct nfs_pgio_header *hdr)
- {
- if (test_and_set_bit(NFS_IOHDR_STAT, &hdr->flags))
- return;
- nfs4_ff_layout_stat_io_start_read(hdr->inode,
- FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx),
- hdr->args.count,
- task->tk_start);
- }
- static void ff_layout_read_record_layoutstats_done(struct rpc_task *task,
- struct nfs_pgio_header *hdr)
- {
- if (!test_and_clear_bit(NFS_IOHDR_STAT, &hdr->flags))
- return;
- nfs4_ff_layout_stat_io_end_read(task,
- FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx),
- hdr->args.count,
- hdr->res.count);
- set_bit(NFS_LSEG_LAYOUTRETURN, &hdr->lseg->pls_flags);
- }
- static int ff_layout_read_prepare_common(struct rpc_task *task,
- struct nfs_pgio_header *hdr)
- {
- if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) {
- rpc_exit(task, -EIO);
- return -EIO;
- }
- ff_layout_read_record_layoutstats_start(task, hdr);
- return 0;
- }
- /*
- * Call ops for the async read/write cases
- * In the case of dense layouts, the offset needs to be reset to its
- * original value.
- */
- static void ff_layout_read_prepare_v3(struct rpc_task *task, void *data)
- {
- struct nfs_pgio_header *hdr = data;
- if (ff_layout_read_prepare_common(task, hdr))
- return;
- rpc_call_start(task);
- }
- static void ff_layout_read_prepare_v4(struct rpc_task *task, void *data)
- {
- struct nfs_pgio_header *hdr = data;
- if (nfs4_setup_sequence(hdr->ds_clp,
- &hdr->args.seq_args,
- &hdr->res.seq_res,
- task))
- return;
- ff_layout_read_prepare_common(task, hdr);
- }
- static void ff_layout_read_call_done(struct rpc_task *task, void *data)
- {
- struct nfs_pgio_header *hdr = data;
- dprintk("--> %s task->tk_status %d\n", __func__, task->tk_status);
- if (test_bit(NFS_IOHDR_REDO, &hdr->flags) &&
- task->tk_status == 0) {
- nfs4_sequence_done(task, &hdr->res.seq_res);
- return;
- }
- /* Note this may cause RPC to be resent */
- hdr->mds_ops->rpc_call_done(task, hdr);
- }
- static void ff_layout_read_count_stats(struct rpc_task *task, void *data)
- {
- struct nfs_pgio_header *hdr = data;
- ff_layout_read_record_layoutstats_done(task, hdr);
- rpc_count_iostats_metrics(task,
- &NFS_CLIENT(hdr->inode)->cl_metrics[NFSPROC4_CLNT_READ]);
- }
- static void ff_layout_read_release(void *data)
- {
- struct nfs_pgio_header *hdr = data;
- ff_layout_read_record_layoutstats_done(&hdr->task, hdr);
- if (test_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags))
- ff_layout_resend_pnfs_read(hdr);
- else if (test_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags))
- ff_layout_reset_read(hdr);
- pnfs_generic_rw_release(data);
- }
- static int ff_layout_write_done_cb(struct rpc_task *task,
- struct nfs_pgio_header *hdr)
- {
- loff_t end_offs = 0;
- int err;
- if (task->tk_status < 0) {
- ff_layout_io_track_ds_error(hdr->lseg, hdr->pgio_mirror_idx,
- hdr->args.offset, hdr->args.count,
- &hdr->res.op_status, OP_WRITE,
- task->tk_status);
- trace_ff_layout_write_error(hdr);
- }
- err = ff_layout_async_handle_error(task, hdr->args.context->state,
- hdr->ds_clp, hdr->lseg,
- hdr->pgio_mirror_idx);
- trace_nfs4_pnfs_write(hdr, err);
- clear_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags);
- clear_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags);
- switch (err) {
- case -NFS4ERR_RESET_TO_PNFS:
- set_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags);
- return task->tk_status;
- case -NFS4ERR_RESET_TO_MDS:
- set_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags);
- return task->tk_status;
- case -EAGAIN:
- return -EAGAIN;
- }
- if (hdr->res.verf->committed == NFS_FILE_SYNC ||
- hdr->res.verf->committed == NFS_DATA_SYNC)
- end_offs = hdr->mds_offset + (loff_t)hdr->res.count;
- /* Note: if the write is unstable, don't set end_offs until commit */
- ff_layout_set_layoutcommit(hdr->inode, hdr->lseg, end_offs);
- /* zero out fattr since we don't care DS attr at all */
- hdr->fattr.valid = 0;
- if (task->tk_status >= 0)
- nfs_writeback_update_inode(hdr);
- return 0;
- }
- static int ff_layout_commit_done_cb(struct rpc_task *task,
- struct nfs_commit_data *data)
- {
- int err;
- if (task->tk_status < 0) {
- ff_layout_io_track_ds_error(data->lseg, data->ds_commit_index,
- data->args.offset, data->args.count,
- &data->res.op_status, OP_COMMIT,
- task->tk_status);
- trace_ff_layout_commit_error(data);
- }
- err = ff_layout_async_handle_error(task, NULL, data->ds_clp,
- data->lseg, data->ds_commit_index);
- trace_nfs4_pnfs_commit_ds(data, err);
- switch (err) {
- case -NFS4ERR_RESET_TO_PNFS:
- pnfs_generic_prepare_to_resend_writes(data);
- return -EAGAIN;
- case -NFS4ERR_RESET_TO_MDS:
- pnfs_generic_prepare_to_resend_writes(data);
- return -EAGAIN;
- case -EAGAIN:
- rpc_restart_call_prepare(task);
- return -EAGAIN;
- }
- ff_layout_set_layoutcommit(data->inode, data->lseg, data->lwb);
- return 0;
- }
- static void ff_layout_write_record_layoutstats_start(struct rpc_task *task,
- struct nfs_pgio_header *hdr)
- {
- if (test_and_set_bit(NFS_IOHDR_STAT, &hdr->flags))
- return;
- nfs4_ff_layout_stat_io_start_write(hdr->inode,
- FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx),
- hdr->args.count,
- task->tk_start);
- }
- static void ff_layout_write_record_layoutstats_done(struct rpc_task *task,
- struct nfs_pgio_header *hdr)
- {
- if (!test_and_clear_bit(NFS_IOHDR_STAT, &hdr->flags))
- return;
- nfs4_ff_layout_stat_io_end_write(task,
- FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx),
- hdr->args.count, hdr->res.count,
- hdr->res.verf->committed);
- set_bit(NFS_LSEG_LAYOUTRETURN, &hdr->lseg->pls_flags);
- }
- static int ff_layout_write_prepare_common(struct rpc_task *task,
- struct nfs_pgio_header *hdr)
- {
- if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) {
- rpc_exit(task, -EIO);
- return -EIO;
- }
- ff_layout_write_record_layoutstats_start(task, hdr);
- return 0;
- }
- static void ff_layout_write_prepare_v3(struct rpc_task *task, void *data)
- {
- struct nfs_pgio_header *hdr = data;
- if (ff_layout_write_prepare_common(task, hdr))
- return;
- rpc_call_start(task);
- }
- static void ff_layout_write_prepare_v4(struct rpc_task *task, void *data)
- {
- struct nfs_pgio_header *hdr = data;
- if (nfs4_setup_sequence(hdr->ds_clp,
- &hdr->args.seq_args,
- &hdr->res.seq_res,
- task))
- return;
- ff_layout_write_prepare_common(task, hdr);
- }
- static void ff_layout_write_call_done(struct rpc_task *task, void *data)
- {
- struct nfs_pgio_header *hdr = data;
- if (test_bit(NFS_IOHDR_REDO, &hdr->flags) &&
- task->tk_status == 0) {
- nfs4_sequence_done(task, &hdr->res.seq_res);
- return;
- }
- /* Note this may cause RPC to be resent */
- hdr->mds_ops->rpc_call_done(task, hdr);
- }
- static void ff_layout_write_count_stats(struct rpc_task *task, void *data)
- {
- struct nfs_pgio_header *hdr = data;
- ff_layout_write_record_layoutstats_done(task, hdr);
- rpc_count_iostats_metrics(task,
- &NFS_CLIENT(hdr->inode)->cl_metrics[NFSPROC4_CLNT_WRITE]);
- }
- static void ff_layout_write_release(void *data)
- {
- struct nfs_pgio_header *hdr = data;
- ff_layout_write_record_layoutstats_done(&hdr->task, hdr);
- if (test_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags)) {
- ff_layout_send_layouterror(hdr->lseg);
- ff_layout_reset_write(hdr, true);
- } else if (test_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags))
- ff_layout_reset_write(hdr, false);
- pnfs_generic_rw_release(data);
- }
- static void ff_layout_commit_record_layoutstats_start(struct rpc_task *task,
- struct nfs_commit_data *cdata)
- {
- if (test_and_set_bit(NFS_IOHDR_STAT, &cdata->flags))
- return;
- nfs4_ff_layout_stat_io_start_write(cdata->inode,
- FF_LAYOUT_COMP(cdata->lseg, cdata->ds_commit_index),
- 0, task->tk_start);
- }
- static void ff_layout_commit_record_layoutstats_done(struct rpc_task *task,
- struct nfs_commit_data *cdata)
- {
- struct nfs_page *req;
- __u64 count = 0;
- if (!test_and_clear_bit(NFS_IOHDR_STAT, &cdata->flags))
- return;
- if (task->tk_status == 0) {
- list_for_each_entry(req, &cdata->pages, wb_list)
- count += req->wb_bytes;
- }
- nfs4_ff_layout_stat_io_end_write(task,
- FF_LAYOUT_COMP(cdata->lseg, cdata->ds_commit_index),
- count, count, NFS_FILE_SYNC);
- set_bit(NFS_LSEG_LAYOUTRETURN, &cdata->lseg->pls_flags);
- }
- static void ff_layout_commit_prepare_common(struct rpc_task *task,
- struct nfs_commit_data *cdata)
- {
- ff_layout_commit_record_layoutstats_start(task, cdata);
- }
- static void ff_layout_commit_prepare_v3(struct rpc_task *task, void *data)
- {
- ff_layout_commit_prepare_common(task, data);
- rpc_call_start(task);
- }
- static void ff_layout_commit_prepare_v4(struct rpc_task *task, void *data)
- {
- struct nfs_commit_data *wdata = data;
- if (nfs4_setup_sequence(wdata->ds_clp,
- &wdata->args.seq_args,
- &wdata->res.seq_res,
- task))
- return;
- ff_layout_commit_prepare_common(task, data);
- }
- static void ff_layout_commit_done(struct rpc_task *task, void *data)
- {
- pnfs_generic_write_commit_done(task, data);
- }
- static void ff_layout_commit_count_stats(struct rpc_task *task, void *data)
- {
- struct nfs_commit_data *cdata = data;
- ff_layout_commit_record_layoutstats_done(task, cdata);
- rpc_count_iostats_metrics(task,
- &NFS_CLIENT(cdata->inode)->cl_metrics[NFSPROC4_CLNT_COMMIT]);
- }
- static void ff_layout_commit_release(void *data)
- {
- struct nfs_commit_data *cdata = data;
- ff_layout_commit_record_layoutstats_done(&cdata->task, cdata);
- pnfs_generic_commit_release(data);
- }
- static const struct rpc_call_ops ff_layout_read_call_ops_v3 = {
- .rpc_call_prepare = ff_layout_read_prepare_v3,
- .rpc_call_done = ff_layout_read_call_done,
- .rpc_count_stats = ff_layout_read_count_stats,
- .rpc_release = ff_layout_read_release,
- };
- static const struct rpc_call_ops ff_layout_read_call_ops_v4 = {
- .rpc_call_prepare = ff_layout_read_prepare_v4,
- .rpc_call_done = ff_layout_read_call_done,
- .rpc_count_stats = ff_layout_read_count_stats,
- .rpc_release = ff_layout_read_release,
- };
- static const struct rpc_call_ops ff_layout_write_call_ops_v3 = {
- .rpc_call_prepare = ff_layout_write_prepare_v3,
- .rpc_call_done = ff_layout_write_call_done,
- .rpc_count_stats = ff_layout_write_count_stats,
- .rpc_release = ff_layout_write_release,
- };
- static const struct rpc_call_ops ff_layout_write_call_ops_v4 = {
- .rpc_call_prepare = ff_layout_write_prepare_v4,
- .rpc_call_done = ff_layout_write_call_done,
- .rpc_count_stats = ff_layout_write_count_stats,
- .rpc_release = ff_layout_write_release,
- };
- static const struct rpc_call_ops ff_layout_commit_call_ops_v3 = {
- .rpc_call_prepare = ff_layout_commit_prepare_v3,
- .rpc_call_done = ff_layout_commit_done,
- .rpc_count_stats = ff_layout_commit_count_stats,
- .rpc_release = ff_layout_commit_release,
- };
- static const struct rpc_call_ops ff_layout_commit_call_ops_v4 = {
- .rpc_call_prepare = ff_layout_commit_prepare_v4,
- .rpc_call_done = ff_layout_commit_done,
- .rpc_count_stats = ff_layout_commit_count_stats,
- .rpc_release = ff_layout_commit_release,
- };
- static enum pnfs_try_status
- ff_layout_read_pagelist(struct nfs_pgio_header *hdr)
- {
- struct pnfs_layout_segment *lseg = hdr->lseg;
- struct nfs4_pnfs_ds *ds;
- struct rpc_clnt *ds_clnt;
- struct nfs4_ff_layout_mirror *mirror;
- const struct cred *ds_cred;
- loff_t offset = hdr->args.offset;
- u32 idx = hdr->pgio_mirror_idx;
- int vers;
- struct nfs_fh *fh;
- dprintk("--> %s ino %lu pgbase %u req %zu@%llu\n",
- __func__, hdr->inode->i_ino,
- hdr->args.pgbase, (size_t)hdr->args.count, offset);
- mirror = FF_LAYOUT_COMP(lseg, idx);
- ds = nfs4_ff_layout_prepare_ds(lseg, mirror, false);
- if (!ds)
- goto out_failed;
- ds_clnt = nfs4_ff_find_or_create_ds_client(mirror, ds->ds_clp,
- hdr->inode);
- if (IS_ERR(ds_clnt))
- goto out_failed;
- ds_cred = ff_layout_get_ds_cred(mirror, &lseg->pls_range, hdr->cred);
- if (!ds_cred)
- goto out_failed;
- vers = nfs4_ff_layout_ds_version(mirror);
- dprintk("%s USE DS: %s cl_count %d vers %d\n", __func__,
- ds->ds_remotestr, refcount_read(&ds->ds_clp->cl_count), vers);
- hdr->pgio_done_cb = ff_layout_read_done_cb;
- refcount_inc(&ds->ds_clp->cl_count);
- hdr->ds_clp = ds->ds_clp;
- fh = nfs4_ff_layout_select_ds_fh(mirror);
- if (fh)
- hdr->args.fh = fh;
- nfs4_ff_layout_select_ds_stateid(mirror, &hdr->args.stateid);
- /*
- * Note that if we ever decide to split across DSes,
- * then we may need to handle dense-like offsets.
- */
- hdr->args.offset = offset;
- hdr->mds_offset = offset;
- /* Perform an asynchronous read to ds */
- nfs_initiate_pgio(ds_clnt, hdr, ds_cred, ds->ds_clp->rpc_ops,
- vers == 3 ? &ff_layout_read_call_ops_v3 :
- &ff_layout_read_call_ops_v4,
- 0, RPC_TASK_SOFTCONN);
- put_cred(ds_cred);
- return PNFS_ATTEMPTED;
- out_failed:
- if (ff_layout_avoid_mds_available_ds(lseg))
- return PNFS_TRY_AGAIN;
- trace_pnfs_mds_fallback_read_pagelist(hdr->inode,
- hdr->args.offset, hdr->args.count,
- IOMODE_READ, NFS_I(hdr->inode)->layout, lseg);
- return PNFS_NOT_ATTEMPTED;
- }
- /* Perform async writes. */
- static enum pnfs_try_status
- ff_layout_write_pagelist(struct nfs_pgio_header *hdr, int sync)
- {
- struct pnfs_layout_segment *lseg = hdr->lseg;
- struct nfs4_pnfs_ds *ds;
- struct rpc_clnt *ds_clnt;
- struct nfs4_ff_layout_mirror *mirror;
- const struct cred *ds_cred;
- loff_t offset = hdr->args.offset;
- int vers;
- struct nfs_fh *fh;
- u32 idx = hdr->pgio_mirror_idx;
- mirror = FF_LAYOUT_COMP(lseg, idx);
- ds = nfs4_ff_layout_prepare_ds(lseg, mirror, true);
- if (!ds)
- goto out_failed;
- ds_clnt = nfs4_ff_find_or_create_ds_client(mirror, ds->ds_clp,
- hdr->inode);
- if (IS_ERR(ds_clnt))
- goto out_failed;
- ds_cred = ff_layout_get_ds_cred(mirror, &lseg->pls_range, hdr->cred);
- if (!ds_cred)
- goto out_failed;
- vers = nfs4_ff_layout_ds_version(mirror);
- dprintk("%s ino %lu sync %d req %zu@%llu DS: %s cl_count %d vers %d\n",
- __func__, hdr->inode->i_ino, sync, (size_t) hdr->args.count,
- offset, ds->ds_remotestr, refcount_read(&ds->ds_clp->cl_count),
- vers);
- hdr->pgio_done_cb = ff_layout_write_done_cb;
- refcount_inc(&ds->ds_clp->cl_count);
- hdr->ds_clp = ds->ds_clp;
- hdr->ds_commit_idx = idx;
- fh = nfs4_ff_layout_select_ds_fh(mirror);
- if (fh)
- hdr->args.fh = fh;
- nfs4_ff_layout_select_ds_stateid(mirror, &hdr->args.stateid);
- /*
- * Note that if we ever decide to split across DSes,
- * then we may need to handle dense-like offsets.
- */
- hdr->args.offset = offset;
- /* Perform an asynchronous write */
- nfs_initiate_pgio(ds_clnt, hdr, ds_cred, ds->ds_clp->rpc_ops,
- vers == 3 ? &ff_layout_write_call_ops_v3 :
- &ff_layout_write_call_ops_v4,
- sync, RPC_TASK_SOFTCONN);
- put_cred(ds_cred);
- return PNFS_ATTEMPTED;
- out_failed:
- if (ff_layout_avoid_mds_available_ds(lseg))
- return PNFS_TRY_AGAIN;
- trace_pnfs_mds_fallback_write_pagelist(hdr->inode,
- hdr->args.offset, hdr->args.count,
- IOMODE_RW, NFS_I(hdr->inode)->layout, lseg);
- return PNFS_NOT_ATTEMPTED;
- }
- static u32 calc_ds_index_from_commit(struct pnfs_layout_segment *lseg, u32 i)
- {
- return i;
- }
- static struct nfs_fh *
- select_ds_fh_from_commit(struct pnfs_layout_segment *lseg, u32 i)
- {
- struct nfs4_ff_layout_segment *flseg = FF_LAYOUT_LSEG(lseg);
- /* FIXME: Assume that there is only one NFS version available
- * for the DS.
- */
- return &flseg->mirror_array[i]->fh_versions[0];
- }
- static int ff_layout_initiate_commit(struct nfs_commit_data *data, int how)
- {
- struct pnfs_layout_segment *lseg = data->lseg;
- struct nfs4_pnfs_ds *ds;
- struct rpc_clnt *ds_clnt;
- struct nfs4_ff_layout_mirror *mirror;
- const struct cred *ds_cred;
- u32 idx;
- int vers, ret;
- struct nfs_fh *fh;
- if (!lseg || !(pnfs_is_valid_lseg(lseg) ||
- test_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags)))
- goto out_err;
- idx = calc_ds_index_from_commit(lseg, data->ds_commit_index);
- mirror = FF_LAYOUT_COMP(lseg, idx);
- ds = nfs4_ff_layout_prepare_ds(lseg, mirror, true);
- if (!ds)
- goto out_err;
- ds_clnt = nfs4_ff_find_or_create_ds_client(mirror, ds->ds_clp,
- data->inode);
- if (IS_ERR(ds_clnt))
- goto out_err;
- ds_cred = ff_layout_get_ds_cred(mirror, &lseg->pls_range, data->cred);
- if (!ds_cred)
- goto out_err;
- vers = nfs4_ff_layout_ds_version(mirror);
- dprintk("%s ino %lu, how %d cl_count %d vers %d\n", __func__,
- data->inode->i_ino, how, refcount_read(&ds->ds_clp->cl_count),
- vers);
- data->commit_done_cb = ff_layout_commit_done_cb;
- data->cred = ds_cred;
- refcount_inc(&ds->ds_clp->cl_count);
- data->ds_clp = ds->ds_clp;
- fh = select_ds_fh_from_commit(lseg, data->ds_commit_index);
- if (fh)
- data->args.fh = fh;
- ret = nfs_initiate_commit(ds_clnt, data, ds->ds_clp->rpc_ops,
- vers == 3 ? &ff_layout_commit_call_ops_v3 :
- &ff_layout_commit_call_ops_v4,
- how, RPC_TASK_SOFTCONN);
- put_cred(ds_cred);
- return ret;
- out_err:
- pnfs_generic_prepare_to_resend_writes(data);
- pnfs_generic_commit_release(data);
- return -EAGAIN;
- }
- static int
- ff_layout_commit_pagelist(struct inode *inode, struct list_head *mds_pages,
- int how, struct nfs_commit_info *cinfo)
- {
- return pnfs_generic_commit_pagelist(inode, mds_pages, how, cinfo,
- ff_layout_initiate_commit);
- }
- static struct pnfs_ds_commit_info *
- ff_layout_get_ds_info(struct inode *inode)
- {
- struct pnfs_layout_hdr *layout = NFS_I(inode)->layout;
- if (layout == NULL)
- return NULL;
- return &FF_LAYOUT_FROM_HDR(layout)->commit_info;
- }
- static void
- ff_layout_setup_ds_info(struct pnfs_ds_commit_info *fl_cinfo,
- struct pnfs_layout_segment *lseg)
- {
- struct nfs4_ff_layout_segment *flseg = FF_LAYOUT_LSEG(lseg);
- struct inode *inode = lseg->pls_layout->plh_inode;
- struct pnfs_commit_array *array, *new;
- new = pnfs_alloc_commit_array(flseg->mirror_array_cnt, GFP_NOIO);
- if (new) {
- spin_lock(&inode->i_lock);
- array = pnfs_add_commit_array(fl_cinfo, new, lseg);
- spin_unlock(&inode->i_lock);
- if (array != new)
- pnfs_free_commit_array(new);
- }
- }
- static void
- ff_layout_release_ds_info(struct pnfs_ds_commit_info *fl_cinfo,
- struct inode *inode)
- {
- spin_lock(&inode->i_lock);
- pnfs_generic_ds_cinfo_destroy(fl_cinfo);
- spin_unlock(&inode->i_lock);
- }
- static void
- ff_layout_free_deviceid_node(struct nfs4_deviceid_node *d)
- {
- nfs4_ff_layout_free_deviceid(container_of(d, struct nfs4_ff_layout_ds,
- id_node));
- }
- static int ff_layout_encode_ioerr(struct xdr_stream *xdr,
- const struct nfs4_layoutreturn_args *args,
- const struct nfs4_flexfile_layoutreturn_args *ff_args)
- {
- __be32 *start;
- start = xdr_reserve_space(xdr, 4);
- if (unlikely(!start))
- return -E2BIG;
- *start = cpu_to_be32(ff_args->num_errors);
- /* This assume we always return _ALL_ layouts */
- return ff_layout_encode_ds_ioerr(xdr, &ff_args->errors);
- }
- static void
- encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
- {
- WARN_ON_ONCE(xdr_stream_encode_opaque_fixed(xdr, buf, len) < 0);
- }
- static void
- ff_layout_encode_ff_iostat_head(struct xdr_stream *xdr,
- const nfs4_stateid *stateid,
- const struct nfs42_layoutstat_devinfo *devinfo)
- {
- __be32 *p;
- p = xdr_reserve_space(xdr, 8 + 8);
- p = xdr_encode_hyper(p, devinfo->offset);
- p = xdr_encode_hyper(p, devinfo->length);
- encode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE);
- p = xdr_reserve_space(xdr, 4*8);
- p = xdr_encode_hyper(p, devinfo->read_count);
- p = xdr_encode_hyper(p, devinfo->read_bytes);
- p = xdr_encode_hyper(p, devinfo->write_count);
- p = xdr_encode_hyper(p, devinfo->write_bytes);
- encode_opaque_fixed(xdr, devinfo->dev_id.data, NFS4_DEVICEID4_SIZE);
- }
- static void
- ff_layout_encode_ff_iostat(struct xdr_stream *xdr,
- const nfs4_stateid *stateid,
- const struct nfs42_layoutstat_devinfo *devinfo)
- {
- ff_layout_encode_ff_iostat_head(xdr, stateid, devinfo);
- ff_layout_encode_ff_layoutupdate(xdr, devinfo,
- devinfo->ld_private.data);
- }
- /* report nothing for now */
- static void ff_layout_encode_iostats_array(struct xdr_stream *xdr,
- const struct nfs4_layoutreturn_args *args,
- struct nfs4_flexfile_layoutreturn_args *ff_args)
- {
- __be32 *p;
- int i;
- p = xdr_reserve_space(xdr, 4);
- *p = cpu_to_be32(ff_args->num_dev);
- for (i = 0; i < ff_args->num_dev; i++)
- ff_layout_encode_ff_iostat(xdr,
- &args->layout->plh_stateid,
- &ff_args->devinfo[i]);
- }
- static void
- ff_layout_free_iostats_array(struct nfs42_layoutstat_devinfo *devinfo,
- unsigned int num_entries)
- {
- unsigned int i;
- for (i = 0; i < num_entries; i++) {
- if (!devinfo[i].ld_private.ops)
- continue;
- if (!devinfo[i].ld_private.ops->free)
- continue;
- devinfo[i].ld_private.ops->free(&devinfo[i].ld_private);
- }
- }
- static struct nfs4_deviceid_node *
- ff_layout_alloc_deviceid_node(struct nfs_server *server,
- struct pnfs_device *pdev, gfp_t gfp_flags)
- {
- struct nfs4_ff_layout_ds *dsaddr;
- dsaddr = nfs4_ff_alloc_deviceid_node(server, pdev, gfp_flags);
- if (!dsaddr)
- return NULL;
- return &dsaddr->id_node;
- }
- static void
- ff_layout_encode_layoutreturn(struct xdr_stream *xdr,
- const void *voidargs,
- const struct nfs4_xdr_opaque_data *ff_opaque)
- {
- const struct nfs4_layoutreturn_args *args = voidargs;
- struct nfs4_flexfile_layoutreturn_args *ff_args = ff_opaque->data;
- struct xdr_buf tmp_buf = {
- .head = {
- [0] = {
- .iov_base = page_address(ff_args->pages[0]),
- },
- },
- .buflen = PAGE_SIZE,
- };
- struct xdr_stream tmp_xdr;
- __be32 *start;
- dprintk("%s: Begin\n", __func__);
- xdr_init_encode(&tmp_xdr, &tmp_buf, NULL, NULL);
- ff_layout_encode_ioerr(&tmp_xdr, args, ff_args);
- ff_layout_encode_iostats_array(&tmp_xdr, args, ff_args);
- start = xdr_reserve_space(xdr, 4);
- *start = cpu_to_be32(tmp_buf.len);
- xdr_write_pages(xdr, ff_args->pages, 0, tmp_buf.len);
- dprintk("%s: Return\n", __func__);
- }
- static void
- ff_layout_free_layoutreturn(struct nfs4_xdr_opaque_data *args)
- {
- struct nfs4_flexfile_layoutreturn_args *ff_args;
- if (!args->data)
- return;
- ff_args = args->data;
- args->data = NULL;
- ff_layout_free_ds_ioerr(&ff_args->errors);
- ff_layout_free_iostats_array(ff_args->devinfo, ff_args->num_dev);
- put_page(ff_args->pages[0]);
- kfree(ff_args);
- }
- static const struct nfs4_xdr_opaque_ops layoutreturn_ops = {
- .encode = ff_layout_encode_layoutreturn,
- .free = ff_layout_free_layoutreturn,
- };
- static int
- ff_layout_prepare_layoutreturn(struct nfs4_layoutreturn_args *args)
- {
- struct nfs4_flexfile_layoutreturn_args *ff_args;
- struct nfs4_flexfile_layout *ff_layout = FF_LAYOUT_FROM_HDR(args->layout);
- ff_args = kmalloc(sizeof(*ff_args), GFP_KERNEL);
- if (!ff_args)
- goto out_nomem;
- ff_args->pages[0] = alloc_page(GFP_KERNEL);
- if (!ff_args->pages[0])
- goto out_nomem_free;
- INIT_LIST_HEAD(&ff_args->errors);
- ff_args->num_errors = ff_layout_fetch_ds_ioerr(args->layout,
- &args->range, &ff_args->errors,
- FF_LAYOUTRETURN_MAXERR);
- spin_lock(&args->inode->i_lock);
- ff_args->num_dev = ff_layout_mirror_prepare_stats(&ff_layout->generic_hdr,
- &ff_args->devinfo[0], ARRAY_SIZE(ff_args->devinfo));
- spin_unlock(&args->inode->i_lock);
- args->ld_private->ops = &layoutreturn_ops;
- args->ld_private->data = ff_args;
- return 0;
- out_nomem_free:
- kfree(ff_args);
- out_nomem:
- return -ENOMEM;
- }
- #ifdef CONFIG_NFS_V4_2
- void
- ff_layout_send_layouterror(struct pnfs_layout_segment *lseg)
- {
- struct pnfs_layout_hdr *lo = lseg->pls_layout;
- struct nfs42_layout_error *errors;
- LIST_HEAD(head);
- if (!nfs_server_capable(lo->plh_inode, NFS_CAP_LAYOUTERROR))
- return;
- ff_layout_fetch_ds_ioerr(lo, &lseg->pls_range, &head, -1);
- if (list_empty(&head))
- return;
- errors = kmalloc_array(NFS42_LAYOUTERROR_MAX,
- sizeof(*errors), GFP_NOFS);
- if (errors != NULL) {
- const struct nfs4_ff_layout_ds_err *pos;
- size_t n = 0;
- list_for_each_entry(pos, &head, list) {
- errors[n].offset = pos->offset;
- errors[n].length = pos->length;
- nfs4_stateid_copy(&errors[n].stateid, &pos->stateid);
- errors[n].errors[0].dev_id = pos->deviceid;
- errors[n].errors[0].status = pos->status;
- errors[n].errors[0].opnum = pos->opnum;
- n++;
- if (!list_is_last(&pos->list, &head) &&
- n < NFS42_LAYOUTERROR_MAX)
- continue;
- if (nfs42_proc_layouterror(lseg, errors, n) < 0)
- break;
- n = 0;
- }
- kfree(errors);
- }
- ff_layout_free_ds_ioerr(&head);
- }
- #else
- void
- ff_layout_send_layouterror(struct pnfs_layout_segment *lseg)
- {
- }
- #endif
- static int
- ff_layout_ntop4(const struct sockaddr *sap, char *buf, const size_t buflen)
- {
- const struct sockaddr_in *sin = (struct sockaddr_in *)sap;
- return snprintf(buf, buflen, "%pI4", &sin->sin_addr);
- }
- static size_t
- ff_layout_ntop6_noscopeid(const struct sockaddr *sap, char *buf,
- const int buflen)
- {
- const struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap;
- const struct in6_addr *addr = &sin6->sin6_addr;
- /*
- * RFC 4291, Section 2.2.2
- *
- * Shorthanded ANY address
- */
- if (ipv6_addr_any(addr))
- return snprintf(buf, buflen, "::");
- /*
- * RFC 4291, Section 2.2.2
- *
- * Shorthanded loopback address
- */
- if (ipv6_addr_loopback(addr))
- return snprintf(buf, buflen, "::1");
- /*
- * RFC 4291, Section 2.2.3
- *
- * Special presentation address format for mapped v4
- * addresses.
- */
- if (ipv6_addr_v4mapped(addr))
- return snprintf(buf, buflen, "::ffff:%pI4",
- &addr->s6_addr32[3]);
- /*
- * RFC 4291, Section 2.2.1
- */
- return snprintf(buf, buflen, "%pI6c", addr);
- }
- /* Derived from rpc_sockaddr2uaddr */
- static void
- ff_layout_encode_netaddr(struct xdr_stream *xdr, struct nfs4_pnfs_ds_addr *da)
- {
- struct sockaddr *sap = (struct sockaddr *)&da->da_addr;
- char portbuf[RPCBIND_MAXUADDRPLEN];
- char addrbuf[RPCBIND_MAXUADDRLEN];
- char *netid;
- unsigned short port;
- int len, netid_len;
- __be32 *p;
- switch (sap->sa_family) {
- case AF_INET:
- if (ff_layout_ntop4(sap, addrbuf, sizeof(addrbuf)) == 0)
- return;
- port = ntohs(((struct sockaddr_in *)sap)->sin_port);
- netid = "tcp";
- netid_len = 3;
- break;
- case AF_INET6:
- if (ff_layout_ntop6_noscopeid(sap, addrbuf, sizeof(addrbuf)) == 0)
- return;
- port = ntohs(((struct sockaddr_in6 *)sap)->sin6_port);
- netid = "tcp6";
- netid_len = 4;
- break;
- default:
- /* we only support tcp and tcp6 */
- WARN_ON_ONCE(1);
- return;
- }
- snprintf(portbuf, sizeof(portbuf), ".%u.%u", port >> 8, port & 0xff);
- len = strlcat(addrbuf, portbuf, sizeof(addrbuf));
- p = xdr_reserve_space(xdr, 4 + netid_len);
- xdr_encode_opaque(p, netid, netid_len);
- p = xdr_reserve_space(xdr, 4 + len);
- xdr_encode_opaque(p, addrbuf, len);
- }
- static void
- ff_layout_encode_nfstime(struct xdr_stream *xdr,
- ktime_t t)
- {
- struct timespec64 ts;
- __be32 *p;
- p = xdr_reserve_space(xdr, 12);
- ts = ktime_to_timespec64(t);
- p = xdr_encode_hyper(p, ts.tv_sec);
- *p++ = cpu_to_be32(ts.tv_nsec);
- }
- static void
- ff_layout_encode_io_latency(struct xdr_stream *xdr,
- struct nfs4_ff_io_stat *stat)
- {
- __be32 *p;
- p = xdr_reserve_space(xdr, 5 * 8);
- p = xdr_encode_hyper(p, stat->ops_requested);
- p = xdr_encode_hyper(p, stat->bytes_requested);
- p = xdr_encode_hyper(p, stat->ops_completed);
- p = xdr_encode_hyper(p, stat->bytes_completed);
- p = xdr_encode_hyper(p, stat->bytes_not_delivered);
- ff_layout_encode_nfstime(xdr, stat->total_busy_time);
- ff_layout_encode_nfstime(xdr, stat->aggregate_completion_time);
- }
- static void
- ff_layout_encode_ff_layoutupdate(struct xdr_stream *xdr,
- const struct nfs42_layoutstat_devinfo *devinfo,
- struct nfs4_ff_layout_mirror *mirror)
- {
- struct nfs4_pnfs_ds_addr *da;
- struct nfs4_pnfs_ds *ds = mirror->mirror_ds->ds;
- struct nfs_fh *fh = &mirror->fh_versions[0];
- __be32 *p;
- da = list_first_entry(&ds->ds_addrs, struct nfs4_pnfs_ds_addr, da_node);
- dprintk("%s: DS %s: encoding address %s\n",
- __func__, ds->ds_remotestr, da->da_remotestr);
- /* netaddr4 */
- ff_layout_encode_netaddr(xdr, da);
- /* nfs_fh4 */
- p = xdr_reserve_space(xdr, 4 + fh->size);
- xdr_encode_opaque(p, fh->data, fh->size);
- /* ff_io_latency4 read */
- spin_lock(&mirror->lock);
- ff_layout_encode_io_latency(xdr, &mirror->read_stat.io_stat);
- /* ff_io_latency4 write */
- ff_layout_encode_io_latency(xdr, &mirror->write_stat.io_stat);
- spin_unlock(&mirror->lock);
- /* nfstime4 */
- ff_layout_encode_nfstime(xdr, ktime_sub(ktime_get(), mirror->start_time));
- /* bool */
- p = xdr_reserve_space(xdr, 4);
- *p = cpu_to_be32(false);
- }
- static void
- ff_layout_encode_layoutstats(struct xdr_stream *xdr, const void *args,
- const struct nfs4_xdr_opaque_data *opaque)
- {
- struct nfs42_layoutstat_devinfo *devinfo = container_of(opaque,
- struct nfs42_layoutstat_devinfo, ld_private);
- __be32 *start;
- /* layoutupdate length */
- start = xdr_reserve_space(xdr, 4);
- ff_layout_encode_ff_layoutupdate(xdr, devinfo, opaque->data);
- *start = cpu_to_be32((xdr->p - start - 1) * 4);
- }
- static void
- ff_layout_free_layoutstats(struct nfs4_xdr_opaque_data *opaque)
- {
- struct nfs4_ff_layout_mirror *mirror = opaque->data;
- ff_layout_put_mirror(mirror);
- }
- static const struct nfs4_xdr_opaque_ops layoutstat_ops = {
- .encode = ff_layout_encode_layoutstats,
- .free = ff_layout_free_layoutstats,
- };
- static int
- ff_layout_mirror_prepare_stats(struct pnfs_layout_hdr *lo,
- struct nfs42_layoutstat_devinfo *devinfo,
- int dev_limit)
- {
- struct nfs4_flexfile_layout *ff_layout = FF_LAYOUT_FROM_HDR(lo);
- struct nfs4_ff_layout_mirror *mirror;
- struct nfs4_deviceid_node *dev;
- int i = 0;
- list_for_each_entry(mirror, &ff_layout->mirrors, mirrors) {
- if (i >= dev_limit)
- break;
- if (IS_ERR_OR_NULL(mirror->mirror_ds))
- continue;
- if (!test_and_clear_bit(NFS4_FF_MIRROR_STAT_AVAIL, &mirror->flags))
- continue;
- /* mirror refcount put in cleanup_layoutstats */
- if (!refcount_inc_not_zero(&mirror->ref))
- continue;
- dev = &mirror->mirror_ds->id_node;
- memcpy(&devinfo->dev_id, &dev->deviceid, NFS4_DEVICEID4_SIZE);
- devinfo->offset = 0;
- devinfo->length = NFS4_MAX_UINT64;
- spin_lock(&mirror->lock);
- devinfo->read_count = mirror->read_stat.io_stat.ops_completed;
- devinfo->read_bytes = mirror->read_stat.io_stat.bytes_completed;
- devinfo->write_count = mirror->write_stat.io_stat.ops_completed;
- devinfo->write_bytes = mirror->write_stat.io_stat.bytes_completed;
- spin_unlock(&mirror->lock);
- devinfo->layout_type = LAYOUT_FLEX_FILES;
- devinfo->ld_private.ops = &layoutstat_ops;
- devinfo->ld_private.data = mirror;
- devinfo++;
- i++;
- }
- return i;
- }
- static int
- ff_layout_prepare_layoutstats(struct nfs42_layoutstat_args *args)
- {
- struct nfs4_flexfile_layout *ff_layout;
- const int dev_count = PNFS_LAYOUTSTATS_MAXDEV;
- /* For now, send at most PNFS_LAYOUTSTATS_MAXDEV statistics */
- args->devinfo = kmalloc_array(dev_count, sizeof(*args->devinfo), GFP_NOIO);
- if (!args->devinfo)
- return -ENOMEM;
- spin_lock(&args->inode->i_lock);
- ff_layout = FF_LAYOUT_FROM_HDR(NFS_I(args->inode)->layout);
- args->num_dev = ff_layout_mirror_prepare_stats(&ff_layout->generic_hdr,
- &args->devinfo[0], dev_count);
- spin_unlock(&args->inode->i_lock);
- if (!args->num_dev) {
- kfree(args->devinfo);
- args->devinfo = NULL;
- return -ENOENT;
- }
- return 0;
- }
- static int
- ff_layout_set_layoutdriver(struct nfs_server *server,
- const struct nfs_fh *dummy)
- {
- #if IS_ENABLED(CONFIG_NFS_V4_2)
- server->caps |= NFS_CAP_LAYOUTSTATS;
- #endif
- return 0;
- }
- static const struct pnfs_commit_ops ff_layout_commit_ops = {
- .setup_ds_info = ff_layout_setup_ds_info,
- .release_ds_info = ff_layout_release_ds_info,
- .mark_request_commit = pnfs_layout_mark_request_commit,
- .clear_request_commit = pnfs_generic_clear_request_commit,
- .scan_commit_lists = pnfs_generic_scan_commit_lists,
- .recover_commit_reqs = pnfs_generic_recover_commit_reqs,
- .commit_pagelist = ff_layout_commit_pagelist,
- };
- static struct pnfs_layoutdriver_type flexfilelayout_type = {
- .id = LAYOUT_FLEX_FILES,
- .name = "LAYOUT_FLEX_FILES",
- .owner = THIS_MODULE,
- .flags = PNFS_LAYOUTGET_ON_OPEN,
- .max_layoutget_response = 4096, /* 1 page or so... */
- .set_layoutdriver = ff_layout_set_layoutdriver,
- .alloc_layout_hdr = ff_layout_alloc_layout_hdr,
- .free_layout_hdr = ff_layout_free_layout_hdr,
- .alloc_lseg = ff_layout_alloc_lseg,
- .free_lseg = ff_layout_free_lseg,
- .add_lseg = ff_layout_add_lseg,
- .pg_read_ops = &ff_layout_pg_read_ops,
- .pg_write_ops = &ff_layout_pg_write_ops,
- .get_ds_info = ff_layout_get_ds_info,
- .free_deviceid_node = ff_layout_free_deviceid_node,
- .read_pagelist = ff_layout_read_pagelist,
- .write_pagelist = ff_layout_write_pagelist,
- .alloc_deviceid_node = ff_layout_alloc_deviceid_node,
- .prepare_layoutreturn = ff_layout_prepare_layoutreturn,
- .sync = pnfs_nfs_generic_sync,
- .prepare_layoutstats = ff_layout_prepare_layoutstats,
- };
- static int __init nfs4flexfilelayout_init(void)
- {
- printk(KERN_INFO "%s: NFSv4 Flexfile Layout Driver Registering...\n",
- __func__);
- return pnfs_register_layoutdriver(&flexfilelayout_type);
- }
- static void __exit nfs4flexfilelayout_exit(void)
- {
- printk(KERN_INFO "%s: NFSv4 Flexfile Layout Driver Unregistering...\n",
- __func__);
- pnfs_unregister_layoutdriver(&flexfilelayout_type);
- }
- MODULE_ALIAS("nfs-layouttype4-4");
- MODULE_LICENSE("GPL");
- MODULE_DESCRIPTION("The NFSv4 flexfile layout driver");
- module_init(nfs4flexfilelayout_init);
- module_exit(nfs4flexfilelayout_exit);
- module_param(io_maxretrans, ushort, 0644);
- MODULE_PARM_DESC(io_maxretrans, "The number of times the NFSv4.1 client "
- "retries an I/O request before returning an error. ");
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