| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Trond Myklebust | 5536 | 43.34% | 117 | 51.77% |
| Tom Haynes | 4990 | 39.07% | 7 | 3.10% |
| Peng Tao | 1294 | 10.13% | 14 | 6.19% |
| Jeff Layton | 195 | 1.53% | 5 | 2.21% |
| Fred Isaman | 152 | 1.19% | 17 | 7.52% |
| Andy Adamson | 133 | 1.04% | 10 | 4.42% |
| Neil Brown | 92 | 0.72% | 3 | 1.33% |
| Weston Andros Adamson | 86 | 0.67% | 9 | 3.98% |
| Anna Schumaker | 52 | 0.41% | 5 | 2.21% |
| Adrian Bunk | 43 | 0.34% | 1 | 0.44% |
| Linus Torvalds (pre-git) | 29 | 0.23% | 7 | 3.10% |
| Andreas Gruenbacher | 24 | 0.19% | 1 | 0.44% |
| Tigran Mkrtchyan | 20 | 0.16% | 1 | 0.44% |
| Benny Halevy | 20 | 0.16% | 4 | 1.77% |
| J. Bruce Fields | 18 | 0.14% | 1 | 0.44% |
| Chuck Lever | 17 | 0.13% | 4 | 1.77% |
| Al Viro | 12 | 0.09% | 1 | 0.44% |
| David P. Quigley | 10 | 0.08% | 2 | 0.88% |
| Elena Reshetova | 10 | 0.08% | 2 | 0.88% |
| Ricardo Labiaga | 9 | 0.07% | 2 | 0.88% |
| Kees Cook | 6 | 0.05% | 2 | 0.88% |
| Dan Carpenter | 5 | 0.04% | 1 | 0.44% |
| Fabian Frederick | 4 | 0.03% | 1 | 0.44% |
| Gustavo A. R. Silva | 4 | 0.03% | 1 | 0.44% |
| Paul Gortmaker | 3 | 0.02% | 1 | 0.44% |
| Thomas Gleixner | 2 | 0.02% | 2 | 0.88% |
| Alexey Dobriyan | 2 | 0.02% | 1 | 0.44% |
| Dean Hildebrand | 2 | 0.02% | 1 | 0.44% |
| Fengguang Wu | 1 | 0.01% | 1 | 0.44% |
| Nikola Livic | 1 | 0.01% | 1 | 0.44% |
| Wei Yongjun | 1 | 0.01% | 1 | 0.44% |
| Total | 12773 | 226 |
// 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 enum nfs4_ff_op_type { NFS4_FF_OP_LAYOUTSTATS, NFS4_FF_OP_LAYOUTRETURN, }; 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, enum nfs4_ff_op_type type); 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_page(&stream, scratch); /* 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(&init_task); else { unsigned int nofs_flags = memalloc_nofs_save(); kcred = prepare_kernel_cred(&init_task); 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, nfs_io_gfp_mask()); } 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, nfs_io_gfp_mask()); } 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; u32 idx; /* mirrors are initially sorted by efficiency */ for (idx = start_idx; idx < fls->mirror_array_cnt; idx++) { mirror = FF_LAYOUT_COMP(lseg, idx); ds = nfs4_ff_layout_prepare_ds(lseg, mirror, false); 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, nfs_io_gfp_mask()); 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, nfs_io_gfp_mask()); 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, nfs_io_gfp_mask()); 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: case -EPROTO: case -ENODEV: 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 -EINVAL: case -ECONNREFUSED: case -ECONNRESET: case -EHOSTDOWN: case -EHOSTUNREACH: case -ENETUNREACH: case -EADDRINUSE: case -ENOBUFS: case -EPIPE: case -EPERM: case -EPROTO: case -ENODEV: *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, nfs_io_gfp_mask()); 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; } if (!pnfs_is_valid_lseg(hdr->lseg)) { rpc_exit(task, -EAGAIN); return -EAGAIN; } 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; 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; } if (!pnfs_is_valid_lseg(hdr->lseg)) { rpc_exit(task, -EAGAIN); return -EAGAIN; } 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 int ff_layout_commit_prepare_common(struct rpc_task *task, struct nfs_commit_data *cdata) { if (!pnfs_is_valid_lseg(cdata->lseg)) { rpc_exit(task, -EAGAIN); return -EAGAIN; } ff_layout_commit_record_layoutstats_start(task, cdata); return 0; } static void ff_layout_commit_prepare_v3(struct rpc_task *task, void *data) { if (ff_layout_commit_prepare_common(task, data)) return; 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 bool ff_layout_match_rw(const struct rpc_task *task, const struct nfs_pgio_header *hdr, const struct pnfs_layout_segment *lseg) { return hdr->lseg == lseg; } static bool ff_layout_match_commit(const struct rpc_task *task, const struct nfs_commit_data *cdata, const struct pnfs_layout_segment *lseg) { return cdata->lseg == lseg; } static bool ff_layout_match_io(const struct rpc_task *task, const void *data) { const struct rpc_call_ops *ops = task->tk_ops; if (ops == &ff_layout_read_call_ops_v3 || ops == &ff_layout_read_call_ops_v4 || ops == &ff_layout_write_call_ops_v3 || ops == &ff_layout_write_call_ops_v4) return ff_layout_match_rw(task, task->tk_calldata, data); if (ops == &ff_layout_commit_call_ops_v3 || ops == &ff_layout_commit_call_ops_v4) return ff_layout_match_commit(task, task->tk_calldata, data); return false; } static void ff_layout_cancel_io(struct pnfs_layout_segment *lseg) { struct nfs4_ff_layout_segment *flseg = FF_LAYOUT_LSEG(lseg); struct nfs4_ff_layout_mirror *mirror; struct nfs4_ff_layout_ds *mirror_ds; struct nfs4_pnfs_ds *ds; struct nfs_client *ds_clp; struct rpc_clnt *clnt; u32 idx; for (idx = 0; idx < flseg->mirror_array_cnt; idx++) { mirror = flseg->mirror_array[idx]; mirror_ds = mirror->mirror_ds; if (!mirror_ds) continue; ds = mirror->mirror_ds->ds; if (!ds) continue; ds_clp = ds->ds_clp; if (!ds_clp) continue; clnt = ds_clp->cl_rpcclient; if (!clnt) continue; if (!rpc_cancel_tasks(clnt, -EAGAIN, ff_layout_match_io, lseg)) continue; rpc_clnt_disconnect(clnt); } } 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, nfs_io_gfp_mask()); 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), nfs_io_gfp_mask()); if (!ff_args) goto out_nomem; ff_args->pages[0] = alloc_page(nfs_io_gfp_mask()); 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), NFS4_FF_OP_LAYOUTRETURN); 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), nfs_io_gfp_mask()); 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]; 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); break; case AF_INET6: if (ff_layout_ntop6_noscopeid(sap, addrbuf, sizeof(addrbuf)) == 0) return; port = ntohs(((struct sockaddr_in6 *)sap)->sin6_port); break; default: WARN_ON_ONCE(1); return; } snprintf(portbuf, sizeof(portbuf), ".%u.%u", port >> 8, port & 0xff); len = strlcat(addrbuf, portbuf, sizeof(addrbuf)); netid_len = strlen(da->da_netid); p = xdr_reserve_space(xdr, 4 + netid_len); xdr_encode_opaque(p, da->da_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, enum nfs4_ff_op_type type) { 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) && type != NFS4_FF_OP_LAYOUTRETURN) 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 pnfs_layout_hdr *lo; 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), nfs_io_gfp_mask()); if (!args->devinfo) return -ENOMEM; spin_lock(&args->inode->i_lock); lo = NFS_I(args->inode)->layout; if (lo && pnfs_layout_is_valid(lo)) { ff_layout = FF_LAYOUT_FROM_HDR(lo); args->num_dev = ff_layout_mirror_prepare_stats( &ff_layout->generic_hdr, &args->devinfo[0], dev_count, NFS4_FF_OP_LAYOUTSTATS); } else args->num_dev = 0; 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, .cancel_io = ff_layout_cancel_io, }; 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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