mirror of https://gitee.com/openkylin/linux.git
2530 lines
66 KiB
C
2530 lines
66 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Module for pnfs flexfile layout driver.
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*
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* Copyright (c) 2014, Primary Data, Inc. All rights reserved.
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*
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* Tao Peng <bergwolf@primarydata.com>
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*/
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#include <linux/nfs_fs.h>
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#include <linux/nfs_mount.h>
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#include <linux/nfs_page.h>
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#include <linux/module.h>
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#include <linux/sched/mm.h>
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#include <linux/sunrpc/metrics.h>
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#include "flexfilelayout.h"
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#include "../nfs4session.h"
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#include "../nfs4idmap.h"
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#include "../internal.h"
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#include "../delegation.h"
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#include "../nfs4trace.h"
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#include "../iostat.h"
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#include "../nfs.h"
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#include "../nfs42.h"
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#define NFSDBG_FACILITY NFSDBG_PNFS_LD
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#define FF_LAYOUT_POLL_RETRY_MAX (15*HZ)
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#define FF_LAYOUTRETURN_MAXERR 20
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static unsigned short io_maxretrans;
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static const struct pnfs_commit_ops ff_layout_commit_ops;
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static void ff_layout_read_record_layoutstats_done(struct rpc_task *task,
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struct nfs_pgio_header *hdr);
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static int ff_layout_mirror_prepare_stats(struct pnfs_layout_hdr *lo,
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struct nfs42_layoutstat_devinfo *devinfo,
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int dev_limit);
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static void ff_layout_encode_ff_layoutupdate(struct xdr_stream *xdr,
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const struct nfs42_layoutstat_devinfo *devinfo,
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struct nfs4_ff_layout_mirror *mirror);
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static struct pnfs_layout_hdr *
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ff_layout_alloc_layout_hdr(struct inode *inode, gfp_t gfp_flags)
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{
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struct nfs4_flexfile_layout *ffl;
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ffl = kzalloc(sizeof(*ffl), gfp_flags);
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if (ffl) {
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pnfs_init_ds_commit_info(&ffl->commit_info);
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INIT_LIST_HEAD(&ffl->error_list);
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INIT_LIST_HEAD(&ffl->mirrors);
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ffl->last_report_time = ktime_get();
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ffl->commit_info.ops = &ff_layout_commit_ops;
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return &ffl->generic_hdr;
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} else
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return NULL;
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}
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static void
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ff_layout_free_layout_hdr(struct pnfs_layout_hdr *lo)
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{
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struct nfs4_flexfile_layout *ffl = FF_LAYOUT_FROM_HDR(lo);
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struct nfs4_ff_layout_ds_err *err, *n;
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list_for_each_entry_safe(err, n, &ffl->error_list, list) {
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list_del(&err->list);
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kfree(err);
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}
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kfree_rcu(ffl, generic_hdr.plh_rcu);
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}
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static int decode_pnfs_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
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{
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__be32 *p;
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p = xdr_inline_decode(xdr, NFS4_STATEID_SIZE);
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if (unlikely(p == NULL))
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return -ENOBUFS;
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stateid->type = NFS4_PNFS_DS_STATEID_TYPE;
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memcpy(stateid->data, p, NFS4_STATEID_SIZE);
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dprintk("%s: stateid id= [%x%x%x%x]\n", __func__,
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p[0], p[1], p[2], p[3]);
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return 0;
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}
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static int decode_deviceid(struct xdr_stream *xdr, struct nfs4_deviceid *devid)
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{
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__be32 *p;
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p = xdr_inline_decode(xdr, NFS4_DEVICEID4_SIZE);
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if (unlikely(!p))
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return -ENOBUFS;
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memcpy(devid, p, NFS4_DEVICEID4_SIZE);
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nfs4_print_deviceid(devid);
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return 0;
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}
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static int decode_nfs_fh(struct xdr_stream *xdr, struct nfs_fh *fh)
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{
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__be32 *p;
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p = xdr_inline_decode(xdr, 4);
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if (unlikely(!p))
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return -ENOBUFS;
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fh->size = be32_to_cpup(p++);
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if (fh->size > sizeof(struct nfs_fh)) {
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printk(KERN_ERR "NFS flexfiles: Too big fh received %d\n",
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fh->size);
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return -EOVERFLOW;
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}
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/* fh.data */
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p = xdr_inline_decode(xdr, fh->size);
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if (unlikely(!p))
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return -ENOBUFS;
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memcpy(&fh->data, p, fh->size);
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dprintk("%s: fh len %d\n", __func__, fh->size);
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return 0;
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}
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/*
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* Currently only stringified uids and gids are accepted.
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* I.e., kerberos is not supported to the DSes, so no pricipals.
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*
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* That means that one common function will suffice, but when
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* principals are added, this should be split to accomodate
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* calls to both nfs_map_name_to_uid() and nfs_map_group_to_gid().
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*/
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static int
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decode_name(struct xdr_stream *xdr, u32 *id)
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{
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__be32 *p;
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int len;
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/* opaque_length(4)*/
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p = xdr_inline_decode(xdr, 4);
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if (unlikely(!p))
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return -ENOBUFS;
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len = be32_to_cpup(p++);
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if (len < 0)
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return -EINVAL;
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dprintk("%s: len %u\n", __func__, len);
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/* opaque body */
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p = xdr_inline_decode(xdr, len);
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if (unlikely(!p))
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return -ENOBUFS;
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if (!nfs_map_string_to_numeric((char *)p, len, id))
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return -EINVAL;
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return 0;
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}
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static bool ff_mirror_match_fh(const struct nfs4_ff_layout_mirror *m1,
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const struct nfs4_ff_layout_mirror *m2)
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{
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int i, j;
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if (m1->fh_versions_cnt != m2->fh_versions_cnt)
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return false;
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for (i = 0; i < m1->fh_versions_cnt; i++) {
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bool found_fh = false;
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for (j = 0; j < m2->fh_versions_cnt; j++) {
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if (nfs_compare_fh(&m1->fh_versions[i],
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&m2->fh_versions[j]) == 0) {
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found_fh = true;
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break;
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}
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}
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if (!found_fh)
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return false;
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}
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return true;
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}
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static struct nfs4_ff_layout_mirror *
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ff_layout_add_mirror(struct pnfs_layout_hdr *lo,
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struct nfs4_ff_layout_mirror *mirror)
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{
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struct nfs4_flexfile_layout *ff_layout = FF_LAYOUT_FROM_HDR(lo);
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struct nfs4_ff_layout_mirror *pos;
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struct inode *inode = lo->plh_inode;
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spin_lock(&inode->i_lock);
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list_for_each_entry(pos, &ff_layout->mirrors, mirrors) {
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if (memcmp(&mirror->devid, &pos->devid, sizeof(pos->devid)) != 0)
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continue;
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if (!ff_mirror_match_fh(mirror, pos))
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continue;
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if (refcount_inc_not_zero(&pos->ref)) {
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spin_unlock(&inode->i_lock);
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return pos;
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}
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}
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list_add(&mirror->mirrors, &ff_layout->mirrors);
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mirror->layout = lo;
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spin_unlock(&inode->i_lock);
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return mirror;
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}
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static void
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ff_layout_remove_mirror(struct nfs4_ff_layout_mirror *mirror)
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{
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struct inode *inode;
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if (mirror->layout == NULL)
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return;
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inode = mirror->layout->plh_inode;
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spin_lock(&inode->i_lock);
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list_del(&mirror->mirrors);
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spin_unlock(&inode->i_lock);
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mirror->layout = NULL;
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}
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static struct nfs4_ff_layout_mirror *ff_layout_alloc_mirror(gfp_t gfp_flags)
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{
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struct nfs4_ff_layout_mirror *mirror;
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mirror = kzalloc(sizeof(*mirror), gfp_flags);
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if (mirror != NULL) {
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spin_lock_init(&mirror->lock);
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refcount_set(&mirror->ref, 1);
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INIT_LIST_HEAD(&mirror->mirrors);
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}
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return mirror;
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}
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static void ff_layout_free_mirror(struct nfs4_ff_layout_mirror *mirror)
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{
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const struct cred *cred;
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ff_layout_remove_mirror(mirror);
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kfree(mirror->fh_versions);
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cred = rcu_access_pointer(mirror->ro_cred);
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put_cred(cred);
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cred = rcu_access_pointer(mirror->rw_cred);
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put_cred(cred);
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nfs4_ff_layout_put_deviceid(mirror->mirror_ds);
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kfree(mirror);
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}
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static void ff_layout_put_mirror(struct nfs4_ff_layout_mirror *mirror)
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{
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if (mirror != NULL && refcount_dec_and_test(&mirror->ref))
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ff_layout_free_mirror(mirror);
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}
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static void ff_layout_free_mirror_array(struct nfs4_ff_layout_segment *fls)
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{
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u32 i;
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for (i = 0; i < fls->mirror_array_cnt; i++)
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ff_layout_put_mirror(fls->mirror_array[i]);
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}
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static void _ff_layout_free_lseg(struct nfs4_ff_layout_segment *fls)
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{
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if (fls) {
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ff_layout_free_mirror_array(fls);
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kfree(fls);
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}
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}
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static bool
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ff_lseg_match_mirrors(struct pnfs_layout_segment *l1,
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struct pnfs_layout_segment *l2)
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{
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const struct nfs4_ff_layout_segment *fl1 = FF_LAYOUT_LSEG(l1);
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const struct nfs4_ff_layout_segment *fl2 = FF_LAYOUT_LSEG(l1);
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u32 i;
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if (fl1->mirror_array_cnt != fl2->mirror_array_cnt)
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return false;
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for (i = 0; i < fl1->mirror_array_cnt; i++) {
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if (fl1->mirror_array[i] != fl2->mirror_array[i])
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return false;
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}
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return true;
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}
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static bool
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ff_lseg_range_is_after(const struct pnfs_layout_range *l1,
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const struct pnfs_layout_range *l2)
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{
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u64 end1, end2;
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if (l1->iomode != l2->iomode)
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return l1->iomode != IOMODE_READ;
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end1 = pnfs_calc_offset_end(l1->offset, l1->length);
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end2 = pnfs_calc_offset_end(l2->offset, l2->length);
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if (end1 < l2->offset)
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return false;
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if (end2 < l1->offset)
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return true;
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return l2->offset <= l1->offset;
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}
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static bool
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ff_lseg_merge(struct pnfs_layout_segment *new,
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struct pnfs_layout_segment *old)
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{
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u64 new_end, old_end;
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if (test_bit(NFS_LSEG_LAYOUTRETURN, &old->pls_flags))
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return false;
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if (new->pls_range.iomode != old->pls_range.iomode)
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return false;
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old_end = pnfs_calc_offset_end(old->pls_range.offset,
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old->pls_range.length);
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if (old_end < new->pls_range.offset)
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return false;
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new_end = pnfs_calc_offset_end(new->pls_range.offset,
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new->pls_range.length);
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if (new_end < old->pls_range.offset)
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return false;
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if (!ff_lseg_match_mirrors(new, old))
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return false;
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/* Mergeable: copy info from 'old' to 'new' */
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if (new_end < old_end)
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new_end = old_end;
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if (new->pls_range.offset < old->pls_range.offset)
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new->pls_range.offset = old->pls_range.offset;
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new->pls_range.length = pnfs_calc_offset_length(new->pls_range.offset,
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new_end);
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if (test_bit(NFS_LSEG_ROC, &old->pls_flags))
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set_bit(NFS_LSEG_ROC, &new->pls_flags);
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return true;
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}
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static void
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ff_layout_add_lseg(struct pnfs_layout_hdr *lo,
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struct pnfs_layout_segment *lseg,
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struct list_head *free_me)
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{
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pnfs_generic_layout_insert_lseg(lo, lseg,
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ff_lseg_range_is_after,
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ff_lseg_merge,
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free_me);
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}
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static void ff_layout_sort_mirrors(struct nfs4_ff_layout_segment *fls)
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{
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int i, j;
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for (i = 0; i < fls->mirror_array_cnt - 1; i++) {
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for (j = i + 1; j < fls->mirror_array_cnt; j++)
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if (fls->mirror_array[i]->efficiency <
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fls->mirror_array[j]->efficiency)
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swap(fls->mirror_array[i],
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fls->mirror_array[j]);
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}
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}
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static struct pnfs_layout_segment *
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ff_layout_alloc_lseg(struct pnfs_layout_hdr *lh,
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struct nfs4_layoutget_res *lgr,
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gfp_t gfp_flags)
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{
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struct pnfs_layout_segment *ret;
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struct nfs4_ff_layout_segment *fls = NULL;
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struct xdr_stream stream;
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struct xdr_buf buf;
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struct page *scratch;
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u64 stripe_unit;
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u32 mirror_array_cnt;
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__be32 *p;
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int i, rc;
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dprintk("--> %s\n", __func__);
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scratch = alloc_page(gfp_flags);
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if (!scratch)
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return ERR_PTR(-ENOMEM);
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xdr_init_decode_pages(&stream, &buf, lgr->layoutp->pages,
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lgr->layoutp->len);
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xdr_set_scratch_buffer(&stream, page_address(scratch), PAGE_SIZE);
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/* stripe unit and mirror_array_cnt */
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rc = -EIO;
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p = xdr_inline_decode(&stream, 8 + 4);
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if (!p)
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goto out_err_free;
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p = xdr_decode_hyper(p, &stripe_unit);
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mirror_array_cnt = be32_to_cpup(p++);
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dprintk("%s: stripe_unit=%llu mirror_array_cnt=%u\n", __func__,
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stripe_unit, mirror_array_cnt);
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if (mirror_array_cnt > NFS4_FLEXFILE_LAYOUT_MAX_MIRROR_CNT ||
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mirror_array_cnt == 0)
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goto out_err_free;
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rc = -ENOMEM;
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fls = kzalloc(struct_size(fls, mirror_array, mirror_array_cnt),
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gfp_flags);
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if (!fls)
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goto out_err_free;
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fls->mirror_array_cnt = mirror_array_cnt;
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fls->stripe_unit = stripe_unit;
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for (i = 0; i < fls->mirror_array_cnt; i++) {
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struct nfs4_ff_layout_mirror *mirror;
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struct cred *kcred;
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const struct cred __rcu *cred;
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kuid_t uid;
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kgid_t gid;
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u32 ds_count, fh_count, id;
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int j;
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rc = -EIO;
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p = xdr_inline_decode(&stream, 4);
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if (!p)
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goto out_err_free;
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ds_count = be32_to_cpup(p);
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/* FIXME: allow for striping? */
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if (ds_count != 1)
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goto out_err_free;
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fls->mirror_array[i] = ff_layout_alloc_mirror(gfp_flags);
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if (fls->mirror_array[i] == NULL) {
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rc = -ENOMEM;
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goto out_err_free;
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}
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fls->mirror_array[i]->ds_count = ds_count;
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/* deviceid */
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rc = decode_deviceid(&stream, &fls->mirror_array[i]->devid);
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if (rc)
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goto out_err_free;
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/* efficiency */
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rc = -EIO;
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p = xdr_inline_decode(&stream, 4);
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if (!p)
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goto out_err_free;
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fls->mirror_array[i]->efficiency = be32_to_cpup(p);
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/* stateid */
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rc = decode_pnfs_stateid(&stream, &fls->mirror_array[i]->stateid);
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if (rc)
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goto out_err_free;
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|
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/* fh */
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rc = -EIO;
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p = xdr_inline_decode(&stream, 4);
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if (!p)
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goto out_err_free;
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fh_count = be32_to_cpup(p);
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fls->mirror_array[i]->fh_versions =
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kcalloc(fh_count, sizeof(struct nfs_fh),
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gfp_flags);
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if (fls->mirror_array[i]->fh_versions == NULL) {
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rc = -ENOMEM;
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goto out_err_free;
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}
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for (j = 0; j < fh_count; j++) {
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rc = decode_nfs_fh(&stream,
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&fls->mirror_array[i]->fh_versions[j]);
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if (rc)
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goto out_err_free;
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}
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|
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fls->mirror_array[i]->fh_versions_cnt = fh_count;
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|
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/* user */
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rc = decode_name(&stream, &id);
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if (rc)
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goto out_err_free;
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uid = make_kuid(&init_user_ns, id);
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|
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/* group */
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rc = decode_name(&stream, &id);
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if (rc)
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goto out_err_free;
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|
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gid = make_kgid(&init_user_ns, id);
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|
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if (gfp_flags & __GFP_FS)
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kcred = prepare_kernel_cred(NULL);
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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, i;
|
|
|
|
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;
|
|
}
|
|
|
|
for (i = 0; i < pgio->pg_mirror_count; i++) {
|
|
mirror = FF_LAYOUT_COMP(pgio->pg_lseg, i);
|
|
pgm = &pgio->pg_mirrors[i];
|
|
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 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,
|
|
};
|
|
|
|
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 + 1, &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. ");
|