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2619 lines
68 KiB
2619 lines
68 KiB
// 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 <[email protected]> |
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*/ |
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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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|
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#include <linux/sunrpc/metrics.h> |
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|
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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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|
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#define NFSDBG_FACILITY NFSDBG_PNFS_LD |
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|
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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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|
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enum nfs4_ff_op_type { |
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NFS4_FF_OP_LAYOUTSTATS, |
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NFS4_FF_OP_LAYOUTRETURN, |
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}; |
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|
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static unsigned short io_maxretrans; |
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|
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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 |
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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, enum nfs4_ff_op_type type); |
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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 > NFS_MAXFHSIZE) { |
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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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|
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return 0; |
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} |
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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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|
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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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|
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dprintk("%s: len %u\n", __func__, len); |
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|
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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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|
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if (!nfs_map_string_to_numeric((char *)p, len, id)) |
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return -EINVAL; |
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|
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return 0; |
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} |
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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 < |
|
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; |
|
|
|
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); |
|
|
|
xdr_init_decode_pages(&stream, &buf, lgr->layoutp->pages, |
|
lgr->layoutp->len); |
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xdr_set_scratch_page(&stream, scratch); |
|
|
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/* stripe unit and mirror_array_cnt */ |
|
rc = -EIO; |
|
p = xdr_inline_decode(&stream, 8 + 4); |
|
if (!p) |
|
goto out_err_free; |
|
|
|
p = xdr_decode_hyper(p, &stripe_unit); |
|
mirror_array_cnt = be32_to_cpup(p++); |
|
dprintk("%s: stripe_unit=%llu mirror_array_cnt=%u\n", __func__, |
|
stripe_unit, mirror_array_cnt); |
|
|
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if (mirror_array_cnt > NFS4_FLEXFILE_LAYOUT_MAX_MIRROR_CNT || |
|
mirror_array_cnt == 0) |
|
goto out_err_free; |
|
|
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rc = -ENOMEM; |
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fls = kzalloc(struct_size(fls, mirror_array, mirror_array_cnt), |
|
gfp_flags); |
|
if (!fls) |
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goto out_err_free; |
|
|
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fls->mirror_array_cnt = mirror_array_cnt; |
|
fls->stripe_unit = stripe_unit; |
|
|
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for (i = 0; i < fls->mirror_array_cnt; i++) { |
|
struct nfs4_ff_layout_mirror *mirror; |
|
struct cred *kcred; |
|
const struct cred __rcu *cred; |
|
kuid_t uid; |
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kgid_t gid; |
|
u32 ds_count, fh_count, id; |
|
int j; |
|
|
|
rc = -EIO; |
|
p = xdr_inline_decode(&stream, 4); |
|
if (!p) |
|
goto out_err_free; |
|
ds_count = be32_to_cpup(p); |
|
|
|
/* FIXME: allow for striping? */ |
|
if (ds_count != 1) |
|
goto out_err_free; |
|
|
|
fls->mirror_array[i] = ff_layout_alloc_mirror(gfp_flags); |
|
if (fls->mirror_array[i] == NULL) { |
|
rc = -ENOMEM; |
|
goto out_err_free; |
|
} |
|
|
|
fls->mirror_array[i]->ds_count = ds_count; |
|
|
|
/* deviceid */ |
|
rc = decode_deviceid(&stream, &fls->mirror_array[i]->devid); |
|
if (rc) |
|
goto out_err_free; |
|
|
|
/* efficiency */ |
|
rc = -EIO; |
|
p = xdr_inline_decode(&stream, 4); |
|
if (!p) |
|
goto out_err_free; |
|
fls->mirror_array[i]->efficiency = be32_to_cpup(p); |
|
|
|
/* stateid */ |
|
rc = decode_pnfs_stateid(&stream, &fls->mirror_array[i]->stateid); |
|
if (rc) |
|
goto out_err_free; |
|
|
|
/* fh */ |
|
rc = -EIO; |
|
p = xdr_inline_decode(&stream, 4); |
|
if (!p) |
|
goto out_err_free; |
|
fh_count = be32_to_cpup(p); |
|
|
|
fls->mirror_array[i]->fh_versions = |
|
kcalloc(fh_count, sizeof(struct nfs_fh), |
|
gfp_flags); |
|
if (fls->mirror_array[i]->fh_versions == NULL) { |
|
rc = -ENOMEM; |
|
goto out_err_free; |
|
} |
|
|
|
for (j = 0; j < fh_count; j++) { |
|
rc = decode_nfs_fh(&stream, |
|
&fls->mirror_array[i]->fh_versions[j]); |
|
if (rc) |
|
goto out_err_free; |
|
} |
|
|
|
fls->mirror_array[i]->fh_versions_cnt = fh_count; |
|
|
|
/* user */ |
|
rc = decode_name(&stream, &id); |
|
if (rc) |
|
goto out_err_free; |
|
|
|
uid = make_kuid(&init_user_ns, id); |
|
|
|
/* group */ |
|
rc = decode_name(&stream, &id); |
|
if (rc) |
|
goto out_err_free; |
|
|
|
gid = make_kgid(&init_user_ns, id); |
|
|
|
if (gfp_flags & __GFP_FS) |
|
kcred = prepare_kernel_cred(NULL); |
|
else { |
|
unsigned int nofs_flags = memalloc_nofs_save(); |
|
kcred = prepare_kernel_cred(NULL); |
|
memalloc_nofs_restore(nofs_flags); |
|
} |
|
rc = -ENOMEM; |
|
if (!kcred) |
|
goto out_err_free; |
|
kcred->fsuid = uid; |
|
kcred->fsgid = gid; |
|
cred = RCU_INITIALIZER(kcred); |
|
|
|
if (lgr->range.iomode == IOMODE_READ) |
|
rcu_assign_pointer(fls->mirror_array[i]->ro_cred, cred); |
|
else |
|
rcu_assign_pointer(fls->mirror_array[i]->rw_cred, cred); |
|
|
|
mirror = ff_layout_add_mirror(lh, fls->mirror_array[i]); |
|
if (mirror != fls->mirror_array[i]) { |
|
/* swap cred ptrs so free_mirror will clean up old */ |
|
if (lgr->range.iomode == IOMODE_READ) { |
|
cred = xchg(&mirror->ro_cred, cred); |
|
rcu_assign_pointer(fls->mirror_array[i]->ro_cred, cred); |
|
} else { |
|
cred = xchg(&mirror->rw_cred, cred); |
|
rcu_assign_pointer(fls->mirror_array[i]->rw_cred, cred); |
|
} |
|
ff_layout_free_mirror(fls->mirror_array[i]); |
|
fls->mirror_array[i] = mirror; |
|
} |
|
|
|
dprintk("%s: iomode %s uid %u gid %u\n", __func__, |
|
lgr->range.iomode == IOMODE_READ ? "READ" : "RW", |
|
from_kuid(&init_user_ns, uid), |
|
from_kgid(&init_user_ns, gid)); |
|
} |
|
|
|
p = xdr_inline_decode(&stream, 4); |
|
if (!p) |
|
goto out_sort_mirrors; |
|
fls->flags = be32_to_cpup(p); |
|
|
|
p = xdr_inline_decode(&stream, 4); |
|
if (!p) |
|
goto out_sort_mirrors; |
|
for (i=0; i < fls->mirror_array_cnt; i++) |
|
fls->mirror_array[i]->report_interval = be32_to_cpup(p); |
|
|
|
out_sort_mirrors: |
|
ff_layout_sort_mirrors(fls); |
|
ret = &fls->generic_hdr; |
|
dprintk("<-- %s (success)\n", __func__); |
|
out_free_page: |
|
__free_page(scratch); |
|
return ret; |
|
out_err_free: |
|
_ff_layout_free_lseg(fls); |
|
ret = ERR_PTR(rc); |
|
dprintk("<-- %s (%d)\n", __func__, rc); |
|
goto out_free_page; |
|
} |
|
|
|
static void |
|
ff_layout_free_lseg(struct pnfs_layout_segment *lseg) |
|
{ |
|
struct nfs4_ff_layout_segment *fls = FF_LAYOUT_LSEG(lseg); |
|
|
|
dprintk("--> %s\n", __func__); |
|
|
|
if (lseg->pls_range.iomode == IOMODE_RW) { |
|
struct nfs4_flexfile_layout *ffl; |
|
struct inode *inode; |
|
|
|
ffl = FF_LAYOUT_FROM_HDR(lseg->pls_layout); |
|
inode = ffl->generic_hdr.plh_inode; |
|
spin_lock(&inode->i_lock); |
|
pnfs_generic_ds_cinfo_release_lseg(&ffl->commit_info, lseg); |
|
spin_unlock(&inode->i_lock); |
|
} |
|
_ff_layout_free_lseg(fls); |
|
} |
|
|
|
static void |
|
nfs4_ff_start_busy_timer(struct nfs4_ff_busy_timer *timer, ktime_t now) |
|
{ |
|
/* first IO request? */ |
|
if (atomic_inc_return(&timer->n_ops) == 1) { |
|
timer->start_time = now; |
|
} |
|
} |
|
|
|
static ktime_t |
|
nfs4_ff_end_busy_timer(struct nfs4_ff_busy_timer *timer, ktime_t now) |
|
{ |
|
ktime_t start; |
|
|
|
if (atomic_dec_return(&timer->n_ops) < 0) |
|
WARN_ON_ONCE(1); |
|
|
|
start = timer->start_time; |
|
timer->start_time = now; |
|
return ktime_sub(now, start); |
|
} |
|
|
|
static bool |
|
nfs4_ff_layoutstat_start_io(struct nfs4_ff_layout_mirror *mirror, |
|
struct nfs4_ff_layoutstat *layoutstat, |
|
ktime_t now) |
|
{ |
|
s64 report_interval = FF_LAYOUTSTATS_REPORT_INTERVAL; |
|
struct nfs4_flexfile_layout *ffl = FF_LAYOUT_FROM_HDR(mirror->layout); |
|
|
|
nfs4_ff_start_busy_timer(&layoutstat->busy_timer, now); |
|
if (!mirror->start_time) |
|
mirror->start_time = now; |
|
if (mirror->report_interval != 0) |
|
report_interval = (s64)mirror->report_interval * 1000LL; |
|
else if (layoutstats_timer != 0) |
|
report_interval = (s64)layoutstats_timer * 1000LL; |
|
if (ktime_to_ms(ktime_sub(now, ffl->last_report_time)) >= |
|
report_interval) { |
|
ffl->last_report_time = now; |
|
return true; |
|
} |
|
|
|
return false; |
|
} |
|
|
|
static void |
|
nfs4_ff_layout_stat_io_update_requested(struct nfs4_ff_layoutstat *layoutstat, |
|
__u64 requested) |
|
{ |
|
struct nfs4_ff_io_stat *iostat = &layoutstat->io_stat; |
|
|
|
iostat->ops_requested++; |
|
iostat->bytes_requested += requested; |
|
} |
|
|
|
static void |
|
nfs4_ff_layout_stat_io_update_completed(struct nfs4_ff_layoutstat *layoutstat, |
|
__u64 requested, |
|
__u64 completed, |
|
ktime_t time_completed, |
|
ktime_t time_started) |
|
{ |
|
struct nfs4_ff_io_stat *iostat = &layoutstat->io_stat; |
|
ktime_t completion_time = ktime_sub(time_completed, time_started); |
|
ktime_t timer; |
|
|
|
iostat->ops_completed++; |
|
iostat->bytes_completed += completed; |
|
iostat->bytes_not_delivered += requested - completed; |
|
|
|
timer = nfs4_ff_end_busy_timer(&layoutstat->busy_timer, time_completed); |
|
iostat->total_busy_time = |
|
ktime_add(iostat->total_busy_time, timer); |
|
iostat->aggregate_completion_time = |
|
ktime_add(iostat->aggregate_completion_time, |
|
completion_time); |
|
} |
|
|
|
static void |
|
nfs4_ff_layout_stat_io_start_read(struct inode *inode, |
|
struct nfs4_ff_layout_mirror *mirror, |
|
__u64 requested, ktime_t now) |
|
{ |
|
bool report; |
|
|
|
spin_lock(&mirror->lock); |
|
report = nfs4_ff_layoutstat_start_io(mirror, &mirror->read_stat, now); |
|
nfs4_ff_layout_stat_io_update_requested(&mirror->read_stat, requested); |
|
set_bit(NFS4_FF_MIRROR_STAT_AVAIL, &mirror->flags); |
|
spin_unlock(&mirror->lock); |
|
|
|
if (report) |
|
pnfs_report_layoutstat(inode, nfs_io_gfp_mask()); |
|
} |
|
|
|
static void |
|
nfs4_ff_layout_stat_io_end_read(struct rpc_task *task, |
|
struct nfs4_ff_layout_mirror *mirror, |
|
__u64 requested, |
|
__u64 completed) |
|
{ |
|
spin_lock(&mirror->lock); |
|
nfs4_ff_layout_stat_io_update_completed(&mirror->read_stat, |
|
requested, completed, |
|
ktime_get(), task->tk_start); |
|
set_bit(NFS4_FF_MIRROR_STAT_AVAIL, &mirror->flags); |
|
spin_unlock(&mirror->lock); |
|
} |
|
|
|
static void |
|
nfs4_ff_layout_stat_io_start_write(struct inode *inode, |
|
struct nfs4_ff_layout_mirror *mirror, |
|
__u64 requested, ktime_t now) |
|
{ |
|
bool report; |
|
|
|
spin_lock(&mirror->lock); |
|
report = nfs4_ff_layoutstat_start_io(mirror , &mirror->write_stat, now); |
|
nfs4_ff_layout_stat_io_update_requested(&mirror->write_stat, requested); |
|
set_bit(NFS4_FF_MIRROR_STAT_AVAIL, &mirror->flags); |
|
spin_unlock(&mirror->lock); |
|
|
|
if (report) |
|
pnfs_report_layoutstat(inode, nfs_io_gfp_mask()); |
|
} |
|
|
|
static void |
|
nfs4_ff_layout_stat_io_end_write(struct rpc_task *task, |
|
struct nfs4_ff_layout_mirror *mirror, |
|
__u64 requested, |
|
__u64 completed, |
|
enum nfs3_stable_how committed) |
|
{ |
|
if (committed == NFS_UNSTABLE) |
|
requested = completed = 0; |
|
|
|
spin_lock(&mirror->lock); |
|
nfs4_ff_layout_stat_io_update_completed(&mirror->write_stat, |
|
requested, completed, ktime_get(), task->tk_start); |
|
set_bit(NFS4_FF_MIRROR_STAT_AVAIL, &mirror->flags); |
|
spin_unlock(&mirror->lock); |
|
} |
|
|
|
static void |
|
ff_layout_mark_ds_unreachable(struct pnfs_layout_segment *lseg, u32 idx) |
|
{ |
|
struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx); |
|
|
|
if (devid) |
|
nfs4_mark_deviceid_unavailable(devid); |
|
} |
|
|
|
static void |
|
ff_layout_mark_ds_reachable(struct pnfs_layout_segment *lseg, u32 idx) |
|
{ |
|
struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx); |
|
|
|
if (devid) |
|
nfs4_mark_deviceid_available(devid); |
|
} |
|
|
|
static struct nfs4_pnfs_ds * |
|
ff_layout_choose_ds_for_read(struct pnfs_layout_segment *lseg, |
|
u32 start_idx, u32 *best_idx, |
|
bool check_device) |
|
{ |
|
struct nfs4_ff_layout_segment *fls = FF_LAYOUT_LSEG(lseg); |
|
struct nfs4_ff_layout_mirror *mirror; |
|
struct nfs4_pnfs_ds *ds; |
|
u32 idx; |
|
|
|
/* mirrors are initially sorted by efficiency */ |
|
for (idx = start_idx; idx < fls->mirror_array_cnt; idx++) { |
|
mirror = FF_LAYOUT_COMP(lseg, idx); |
|
ds = nfs4_ff_layout_prepare_ds(lseg, mirror, false); |
|
if (!ds) |
|
continue; |
|
|
|
if (check_device && |
|
nfs4_test_deviceid_unavailable(&mirror->mirror_ds->id_node)) |
|
continue; |
|
|
|
*best_idx = idx; |
|
return ds; |
|
} |
|
|
|
return NULL; |
|
} |
|
|
|
static struct nfs4_pnfs_ds * |
|
ff_layout_choose_any_ds_for_read(struct pnfs_layout_segment *lseg, |
|
u32 start_idx, u32 *best_idx) |
|
{ |
|
return ff_layout_choose_ds_for_read(lseg, start_idx, best_idx, false); |
|
} |
|
|
|
static struct nfs4_pnfs_ds * |
|
ff_layout_choose_valid_ds_for_read(struct pnfs_layout_segment *lseg, |
|
u32 start_idx, u32 *best_idx) |
|
{ |
|
return ff_layout_choose_ds_for_read(lseg, start_idx, best_idx, true); |
|
} |
|
|
|
static struct nfs4_pnfs_ds * |
|
ff_layout_choose_best_ds_for_read(struct pnfs_layout_segment *lseg, |
|
u32 start_idx, u32 *best_idx) |
|
{ |
|
struct nfs4_pnfs_ds *ds; |
|
|
|
ds = ff_layout_choose_valid_ds_for_read(lseg, start_idx, best_idx); |
|
if (ds) |
|
return ds; |
|
return ff_layout_choose_any_ds_for_read(lseg, start_idx, best_idx); |
|
} |
|
|
|
static struct nfs4_pnfs_ds * |
|
ff_layout_get_ds_for_read(struct nfs_pageio_descriptor *pgio, |
|
u32 *best_idx) |
|
{ |
|
struct pnfs_layout_segment *lseg = pgio->pg_lseg; |
|
struct nfs4_pnfs_ds *ds; |
|
|
|
ds = ff_layout_choose_best_ds_for_read(lseg, pgio->pg_mirror_idx, |
|
best_idx); |
|
if (ds || !pgio->pg_mirror_idx) |
|
return ds; |
|
return ff_layout_choose_best_ds_for_read(lseg, 0, best_idx); |
|
} |
|
|
|
static void |
|
ff_layout_pg_get_read(struct nfs_pageio_descriptor *pgio, |
|
struct nfs_page *req, |
|
bool strict_iomode) |
|
{ |
|
pnfs_put_lseg(pgio->pg_lseg); |
|
pgio->pg_lseg = |
|
pnfs_update_layout(pgio->pg_inode, nfs_req_openctx(req), |
|
req_offset(req), req->wb_bytes, IOMODE_READ, |
|
strict_iomode, nfs_io_gfp_mask()); |
|
if (IS_ERR(pgio->pg_lseg)) { |
|
pgio->pg_error = PTR_ERR(pgio->pg_lseg); |
|
pgio->pg_lseg = NULL; |
|
} |
|
} |
|
|
|
static void |
|
ff_layout_pg_check_layout(struct nfs_pageio_descriptor *pgio, |
|
struct nfs_page *req) |
|
{ |
|
pnfs_generic_pg_check_layout(pgio); |
|
pnfs_generic_pg_check_range(pgio, req); |
|
} |
|
|
|
static void |
|
ff_layout_pg_init_read(struct nfs_pageio_descriptor *pgio, |
|
struct nfs_page *req) |
|
{ |
|
struct nfs_pgio_mirror *pgm; |
|
struct nfs4_ff_layout_mirror *mirror; |
|
struct nfs4_pnfs_ds *ds; |
|
u32 ds_idx; |
|
|
|
retry: |
|
ff_layout_pg_check_layout(pgio, req); |
|
/* Use full layout for now */ |
|
if (!pgio->pg_lseg) { |
|
ff_layout_pg_get_read(pgio, req, false); |
|
if (!pgio->pg_lseg) |
|
goto out_nolseg; |
|
} |
|
if (ff_layout_avoid_read_on_rw(pgio->pg_lseg)) { |
|
ff_layout_pg_get_read(pgio, req, true); |
|
if (!pgio->pg_lseg) |
|
goto out_nolseg; |
|
} |
|
|
|
ds = ff_layout_get_ds_for_read(pgio, &ds_idx); |
|
if (!ds) { |
|
if (!ff_layout_no_fallback_to_mds(pgio->pg_lseg)) |
|
goto out_mds; |
|
pnfs_generic_pg_cleanup(pgio); |
|
/* Sleep for 1 second before retrying */ |
|
ssleep(1); |
|
goto retry; |
|
} |
|
|
|
mirror = FF_LAYOUT_COMP(pgio->pg_lseg, ds_idx); |
|
pgm = &pgio->pg_mirrors[0]; |
|
pgm->pg_bsize = mirror->mirror_ds->ds_versions[0].rsize; |
|
|
|
pgio->pg_mirror_idx = ds_idx; |
|
|
|
if (NFS_SERVER(pgio->pg_inode)->flags & |
|
(NFS_MOUNT_SOFT|NFS_MOUNT_SOFTERR)) |
|
pgio->pg_maxretrans = io_maxretrans; |
|
return; |
|
out_nolseg: |
|
if (pgio->pg_error < 0) |
|
return; |
|
out_mds: |
|
trace_pnfs_mds_fallback_pg_init_read(pgio->pg_inode, |
|
0, NFS4_MAX_UINT64, IOMODE_READ, |
|
NFS_I(pgio->pg_inode)->layout, |
|
pgio->pg_lseg); |
|
pgio->pg_maxretrans = 0; |
|
nfs_pageio_reset_read_mds(pgio); |
|
} |
|
|
|
static void |
|
ff_layout_pg_init_write(struct nfs_pageio_descriptor *pgio, |
|
struct nfs_page *req) |
|
{ |
|
struct nfs4_ff_layout_mirror *mirror; |
|
struct nfs_pgio_mirror *pgm; |
|
struct nfs4_pnfs_ds *ds; |
|
u32 i; |
|
|
|
retry: |
|
ff_layout_pg_check_layout(pgio, req); |
|
if (!pgio->pg_lseg) { |
|
pgio->pg_lseg = |
|
pnfs_update_layout(pgio->pg_inode, nfs_req_openctx(req), |
|
req_offset(req), req->wb_bytes, |
|
IOMODE_RW, false, nfs_io_gfp_mask()); |
|
if (IS_ERR(pgio->pg_lseg)) { |
|
pgio->pg_error = PTR_ERR(pgio->pg_lseg); |
|
pgio->pg_lseg = NULL; |
|
return; |
|
} |
|
} |
|
/* If no lseg, fall back to write through mds */ |
|
if (pgio->pg_lseg == NULL) |
|
goto out_mds; |
|
|
|
/* Use a direct mapping of ds_idx to pgio mirror_idx */ |
|
if (pgio->pg_mirror_count != FF_LAYOUT_MIRROR_COUNT(pgio->pg_lseg)) |
|
goto out_eagain; |
|
|
|
for (i = 0; i < pgio->pg_mirror_count; i++) { |
|
mirror = FF_LAYOUT_COMP(pgio->pg_lseg, i); |
|
ds = nfs4_ff_layout_prepare_ds(pgio->pg_lseg, mirror, true); |
|
if (!ds) { |
|
if (!ff_layout_no_fallback_to_mds(pgio->pg_lseg)) |
|
goto out_mds; |
|
pnfs_generic_pg_cleanup(pgio); |
|
/* Sleep for 1 second before retrying */ |
|
ssleep(1); |
|
goto retry; |
|
} |
|
pgm = &pgio->pg_mirrors[i]; |
|
pgm->pg_bsize = mirror->mirror_ds->ds_versions[0].wsize; |
|
} |
|
|
|
if (NFS_SERVER(pgio->pg_inode)->flags & |
|
(NFS_MOUNT_SOFT|NFS_MOUNT_SOFTERR)) |
|
pgio->pg_maxretrans = io_maxretrans; |
|
return; |
|
out_eagain: |
|
pnfs_generic_pg_cleanup(pgio); |
|
pgio->pg_error = -EAGAIN; |
|
return; |
|
out_mds: |
|
trace_pnfs_mds_fallback_pg_init_write(pgio->pg_inode, |
|
0, NFS4_MAX_UINT64, IOMODE_RW, |
|
NFS_I(pgio->pg_inode)->layout, |
|
pgio->pg_lseg); |
|
pgio->pg_maxretrans = 0; |
|
nfs_pageio_reset_write_mds(pgio); |
|
pgio->pg_error = -EAGAIN; |
|
} |
|
|
|
static unsigned int |
|
ff_layout_pg_get_mirror_count_write(struct nfs_pageio_descriptor *pgio, |
|
struct nfs_page *req) |
|
{ |
|
if (!pgio->pg_lseg) { |
|
pgio->pg_lseg = |
|
pnfs_update_layout(pgio->pg_inode, nfs_req_openctx(req), |
|
req_offset(req), req->wb_bytes, |
|
IOMODE_RW, false, nfs_io_gfp_mask()); |
|
if (IS_ERR(pgio->pg_lseg)) { |
|
pgio->pg_error = PTR_ERR(pgio->pg_lseg); |
|
pgio->pg_lseg = NULL; |
|
goto out; |
|
} |
|
} |
|
if (pgio->pg_lseg) |
|
return FF_LAYOUT_MIRROR_COUNT(pgio->pg_lseg); |
|
|
|
trace_pnfs_mds_fallback_pg_get_mirror_count(pgio->pg_inode, |
|
0, NFS4_MAX_UINT64, IOMODE_RW, |
|
NFS_I(pgio->pg_inode)->layout, |
|
pgio->pg_lseg); |
|
/* no lseg means that pnfs is not in use, so no mirroring here */ |
|
nfs_pageio_reset_write_mds(pgio); |
|
out: |
|
return 1; |
|
} |
|
|
|
static u32 |
|
ff_layout_pg_set_mirror_write(struct nfs_pageio_descriptor *desc, u32 idx) |
|
{ |
|
u32 old = desc->pg_mirror_idx; |
|
|
|
desc->pg_mirror_idx = idx; |
|
return old; |
|
} |
|
|
|
static struct nfs_pgio_mirror * |
|
ff_layout_pg_get_mirror_write(struct nfs_pageio_descriptor *desc, u32 idx) |
|
{ |
|
return &desc->pg_mirrors[idx]; |
|
} |
|
|
|
static const struct nfs_pageio_ops ff_layout_pg_read_ops = { |
|
.pg_init = ff_layout_pg_init_read, |
|
.pg_test = pnfs_generic_pg_test, |
|
.pg_doio = pnfs_generic_pg_readpages, |
|
.pg_cleanup = pnfs_generic_pg_cleanup, |
|
}; |
|
|
|
static const struct nfs_pageio_ops ff_layout_pg_write_ops = { |
|
.pg_init = ff_layout_pg_init_write, |
|
.pg_test = pnfs_generic_pg_test, |
|
.pg_doio = pnfs_generic_pg_writepages, |
|
.pg_get_mirror_count = ff_layout_pg_get_mirror_count_write, |
|
.pg_cleanup = pnfs_generic_pg_cleanup, |
|
.pg_get_mirror = ff_layout_pg_get_mirror_write, |
|
.pg_set_mirror = ff_layout_pg_set_mirror_write, |
|
}; |
|
|
|
static void ff_layout_reset_write(struct nfs_pgio_header *hdr, bool retry_pnfs) |
|
{ |
|
struct rpc_task *task = &hdr->task; |
|
|
|
pnfs_layoutcommit_inode(hdr->inode, false); |
|
|
|
if (retry_pnfs) { |
|
dprintk("%s Reset task %5u for i/o through pNFS " |
|
"(req %s/%llu, %u bytes @ offset %llu)\n", __func__, |
|
hdr->task.tk_pid, |
|
hdr->inode->i_sb->s_id, |
|
(unsigned long long)NFS_FILEID(hdr->inode), |
|
hdr->args.count, |
|
(unsigned long long)hdr->args.offset); |
|
|
|
hdr->completion_ops->reschedule_io(hdr); |
|
return; |
|
} |
|
|
|
if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { |
|
dprintk("%s Reset task %5u for i/o through MDS " |
|
"(req %s/%llu, %u bytes @ offset %llu)\n", __func__, |
|
hdr->task.tk_pid, |
|
hdr->inode->i_sb->s_id, |
|
(unsigned long long)NFS_FILEID(hdr->inode), |
|
hdr->args.count, |
|
(unsigned long long)hdr->args.offset); |
|
|
|
trace_pnfs_mds_fallback_write_done(hdr->inode, |
|
hdr->args.offset, hdr->args.count, |
|
IOMODE_RW, NFS_I(hdr->inode)->layout, |
|
hdr->lseg); |
|
task->tk_status = pnfs_write_done_resend_to_mds(hdr); |
|
} |
|
} |
|
|
|
static void ff_layout_resend_pnfs_read(struct nfs_pgio_header *hdr) |
|
{ |
|
u32 idx = hdr->pgio_mirror_idx + 1; |
|
u32 new_idx = 0; |
|
|
|
if (ff_layout_choose_any_ds_for_read(hdr->lseg, idx, &new_idx)) |
|
ff_layout_send_layouterror(hdr->lseg); |
|
else |
|
pnfs_error_mark_layout_for_return(hdr->inode, hdr->lseg); |
|
pnfs_read_resend_pnfs(hdr, new_idx); |
|
} |
|
|
|
static void ff_layout_reset_read(struct nfs_pgio_header *hdr) |
|
{ |
|
struct rpc_task *task = &hdr->task; |
|
|
|
pnfs_layoutcommit_inode(hdr->inode, false); |
|
pnfs_error_mark_layout_for_return(hdr->inode, hdr->lseg); |
|
|
|
if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { |
|
dprintk("%s Reset task %5u for i/o through MDS " |
|
"(req %s/%llu, %u bytes @ offset %llu)\n", __func__, |
|
hdr->task.tk_pid, |
|
hdr->inode->i_sb->s_id, |
|
(unsigned long long)NFS_FILEID(hdr->inode), |
|
hdr->args.count, |
|
(unsigned long long)hdr->args.offset); |
|
|
|
trace_pnfs_mds_fallback_read_done(hdr->inode, |
|
hdr->args.offset, hdr->args.count, |
|
IOMODE_READ, NFS_I(hdr->inode)->layout, |
|
hdr->lseg); |
|
task->tk_status = pnfs_read_done_resend_to_mds(hdr); |
|
} |
|
} |
|
|
|
static int ff_layout_async_handle_error_v4(struct rpc_task *task, |
|
struct nfs4_state *state, |
|
struct nfs_client *clp, |
|
struct pnfs_layout_segment *lseg, |
|
u32 idx) |
|
{ |
|
struct pnfs_layout_hdr *lo = lseg->pls_layout; |
|
struct inode *inode = lo->plh_inode; |
|
struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx); |
|
struct nfs4_slot_table *tbl = &clp->cl_session->fc_slot_table; |
|
|
|
switch (task->tk_status) { |
|
case -NFS4ERR_BADSESSION: |
|
case -NFS4ERR_BADSLOT: |
|
case -NFS4ERR_BAD_HIGH_SLOT: |
|
case -NFS4ERR_DEADSESSION: |
|
case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
|
case -NFS4ERR_SEQ_FALSE_RETRY: |
|
case -NFS4ERR_SEQ_MISORDERED: |
|
dprintk("%s ERROR %d, Reset session. Exchangeid " |
|
"flags 0x%x\n", __func__, task->tk_status, |
|
clp->cl_exchange_flags); |
|
nfs4_schedule_session_recovery(clp->cl_session, task->tk_status); |
|
break; |
|
case -NFS4ERR_DELAY: |
|
case -NFS4ERR_GRACE: |
|
rpc_delay(task, FF_LAYOUT_POLL_RETRY_MAX); |
|
break; |
|
case -NFS4ERR_RETRY_UNCACHED_REP: |
|
break; |
|
/* Invalidate Layout errors */ |
|
case -NFS4ERR_PNFS_NO_LAYOUT: |
|
case -ESTALE: /* mapped NFS4ERR_STALE */ |
|
case -EBADHANDLE: /* mapped NFS4ERR_BADHANDLE */ |
|
case -EISDIR: /* mapped NFS4ERR_ISDIR */ |
|
case -NFS4ERR_FHEXPIRED: |
|
case -NFS4ERR_WRONG_TYPE: |
|
dprintk("%s Invalid layout error %d\n", __func__, |
|
task->tk_status); |
|
/* |
|
* Destroy layout so new i/o will get a new layout. |
|
* Layout will not be destroyed until all current lseg |
|
* references are put. Mark layout as invalid to resend failed |
|
* i/o and all i/o waiting on the slot table to the MDS until |
|
* layout is destroyed and a new valid layout is obtained. |
|
*/ |
|
pnfs_destroy_layout(NFS_I(inode)); |
|
rpc_wake_up(&tbl->slot_tbl_waitq); |
|
goto reset; |
|
/* RPC connection errors */ |
|
case -ECONNREFUSED: |
|
case -EHOSTDOWN: |
|
case -EHOSTUNREACH: |
|
case -ENETUNREACH: |
|
case -EIO: |
|
case -ETIMEDOUT: |
|
case -EPIPE: |
|
case -EPROTO: |
|
case -ENODEV: |
|
dprintk("%s DS connection error %d\n", __func__, |
|
task->tk_status); |
|
nfs4_delete_deviceid(devid->ld, devid->nfs_client, |
|
&devid->deviceid); |
|
rpc_wake_up(&tbl->slot_tbl_waitq); |
|
fallthrough; |
|
default: |
|
if (ff_layout_avoid_mds_available_ds(lseg)) |
|
return -NFS4ERR_RESET_TO_PNFS; |
|
reset: |
|
dprintk("%s Retry through MDS. Error %d\n", __func__, |
|
task->tk_status); |
|
return -NFS4ERR_RESET_TO_MDS; |
|
} |
|
task->tk_status = 0; |
|
return -EAGAIN; |
|
} |
|
|
|
/* Retry all errors through either pNFS or MDS except for -EJUKEBOX */ |
|
static int ff_layout_async_handle_error_v3(struct rpc_task *task, |
|
struct pnfs_layout_segment *lseg, |
|
u32 idx) |
|
{ |
|
struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx); |
|
|
|
switch (task->tk_status) { |
|
/* File access problems. Don't mark the device as unavailable */ |
|
case -EACCES: |
|
case -ESTALE: |
|
case -EISDIR: |
|
case -EBADHANDLE: |
|
case -ELOOP: |
|
case -ENOSPC: |
|
break; |
|
case -EJUKEBOX: |
|
nfs_inc_stats(lseg->pls_layout->plh_inode, NFSIOS_DELAY); |
|
goto out_retry; |
|
default: |
|
dprintk("%s DS connection error %d\n", __func__, |
|
task->tk_status); |
|
nfs4_delete_deviceid(devid->ld, devid->nfs_client, |
|
&devid->deviceid); |
|
} |
|
/* FIXME: Need to prevent infinite looping here. */ |
|
return -NFS4ERR_RESET_TO_PNFS; |
|
out_retry: |
|
task->tk_status = 0; |
|
rpc_restart_call_prepare(task); |
|
rpc_delay(task, NFS_JUKEBOX_RETRY_TIME); |
|
return -EAGAIN; |
|
} |
|
|
|
static int ff_layout_async_handle_error(struct rpc_task *task, |
|
struct nfs4_state *state, |
|
struct nfs_client *clp, |
|
struct pnfs_layout_segment *lseg, |
|
u32 idx) |
|
{ |
|
int vers = clp->cl_nfs_mod->rpc_vers->number; |
|
|
|
if (task->tk_status >= 0) { |
|
ff_layout_mark_ds_reachable(lseg, idx); |
|
return 0; |
|
} |
|
|
|
/* Handle the case of an invalid layout segment */ |
|
if (!pnfs_is_valid_lseg(lseg)) |
|
return -NFS4ERR_RESET_TO_PNFS; |
|
|
|
switch (vers) { |
|
case 3: |
|
return ff_layout_async_handle_error_v3(task, lseg, idx); |
|
case 4: |
|
return ff_layout_async_handle_error_v4(task, state, clp, |
|
lseg, idx); |
|
default: |
|
/* should never happen */ |
|
WARN_ON_ONCE(1); |
|
return 0; |
|
} |
|
} |
|
|
|
static void ff_layout_io_track_ds_error(struct pnfs_layout_segment *lseg, |
|
u32 idx, u64 offset, u64 length, |
|
u32 *op_status, int opnum, int error) |
|
{ |
|
struct nfs4_ff_layout_mirror *mirror; |
|
u32 status = *op_status; |
|
int err; |
|
|
|
if (status == 0) { |
|
switch (error) { |
|
case -ETIMEDOUT: |
|
case -EPFNOSUPPORT: |
|
case -EPROTONOSUPPORT: |
|
case -EOPNOTSUPP: |
|
case -ECONNREFUSED: |
|
case -ECONNRESET: |
|
case -EHOSTDOWN: |
|
case -EHOSTUNREACH: |
|
case -ENETUNREACH: |
|
case -EADDRINUSE: |
|
case -ENOBUFS: |
|
case -EPIPE: |
|
case -EPERM: |
|
case -EPROTO: |
|
case -ENODEV: |
|
*op_status = status = NFS4ERR_NXIO; |
|
break; |
|
case -EACCES: |
|
*op_status = status = NFS4ERR_ACCESS; |
|
break; |
|
default: |
|
return; |
|
} |
|
} |
|
|
|
mirror = FF_LAYOUT_COMP(lseg, idx); |
|
err = ff_layout_track_ds_error(FF_LAYOUT_FROM_HDR(lseg->pls_layout), |
|
mirror, offset, length, status, opnum, |
|
nfs_io_gfp_mask()); |
|
|
|
switch (status) { |
|
case NFS4ERR_DELAY: |
|
case NFS4ERR_GRACE: |
|
break; |
|
case NFS4ERR_NXIO: |
|
ff_layout_mark_ds_unreachable(lseg, idx); |
|
/* |
|
* Don't return the layout if this is a read and we still |
|
* have layouts to try |
|
*/ |
|
if (opnum == OP_READ) |
|
break; |
|
fallthrough; |
|
default: |
|
pnfs_error_mark_layout_for_return(lseg->pls_layout->plh_inode, |
|
lseg); |
|
} |
|
|
|
dprintk("%s: err %d op %d status %u\n", __func__, err, opnum, status); |
|
} |
|
|
|
/* NFS_PROTO call done callback routines */ |
|
static int ff_layout_read_done_cb(struct rpc_task *task, |
|
struct nfs_pgio_header *hdr) |
|
{ |
|
int err; |
|
|
|
if (task->tk_status < 0) { |
|
ff_layout_io_track_ds_error(hdr->lseg, hdr->pgio_mirror_idx, |
|
hdr->args.offset, hdr->args.count, |
|
&hdr->res.op_status, OP_READ, |
|
task->tk_status); |
|
trace_ff_layout_read_error(hdr); |
|
} |
|
|
|
err = ff_layout_async_handle_error(task, hdr->args.context->state, |
|
hdr->ds_clp, hdr->lseg, |
|
hdr->pgio_mirror_idx); |
|
|
|
trace_nfs4_pnfs_read(hdr, err); |
|
clear_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags); |
|
clear_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags); |
|
switch (err) { |
|
case -NFS4ERR_RESET_TO_PNFS: |
|
set_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags); |
|
return task->tk_status; |
|
case -NFS4ERR_RESET_TO_MDS: |
|
set_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags); |
|
return task->tk_status; |
|
case -EAGAIN: |
|
goto out_eagain; |
|
} |
|
|
|
return 0; |
|
out_eagain: |
|
rpc_restart_call_prepare(task); |
|
return -EAGAIN; |
|
} |
|
|
|
static bool |
|
ff_layout_need_layoutcommit(struct pnfs_layout_segment *lseg) |
|
{ |
|
return !(FF_LAYOUT_LSEG(lseg)->flags & FF_FLAGS_NO_LAYOUTCOMMIT); |
|
} |
|
|
|
/* |
|
* We reference the rpc_cred of the first WRITE that triggers the need for |
|
* a LAYOUTCOMMIT, and use it to send the layoutcommit compound. |
|
* rfc5661 is not clear about which credential should be used. |
|
* |
|
* Flexlayout client should treat DS replied FILE_SYNC as DATA_SYNC, so |
|
* to follow http://www.rfc-editor.org/errata_search.php?rfc=5661&eid=2751 |
|
* we always send layoutcommit after DS writes. |
|
*/ |
|
static void |
|
ff_layout_set_layoutcommit(struct inode *inode, |
|
struct pnfs_layout_segment *lseg, |
|
loff_t end_offset) |
|
{ |
|
if (!ff_layout_need_layoutcommit(lseg)) |
|
return; |
|
|
|
pnfs_set_layoutcommit(inode, lseg, end_offset); |
|
dprintk("%s inode %lu pls_end_pos %llu\n", __func__, inode->i_ino, |
|
(unsigned long long) NFS_I(inode)->layout->plh_lwb); |
|
} |
|
|
|
static void ff_layout_read_record_layoutstats_start(struct rpc_task *task, |
|
struct nfs_pgio_header *hdr) |
|
{ |
|
if (test_and_set_bit(NFS_IOHDR_STAT, &hdr->flags)) |
|
return; |
|
nfs4_ff_layout_stat_io_start_read(hdr->inode, |
|
FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx), |
|
hdr->args.count, |
|
task->tk_start); |
|
} |
|
|
|
static void ff_layout_read_record_layoutstats_done(struct rpc_task *task, |
|
struct nfs_pgio_header *hdr) |
|
{ |
|
if (!test_and_clear_bit(NFS_IOHDR_STAT, &hdr->flags)) |
|
return; |
|
nfs4_ff_layout_stat_io_end_read(task, |
|
FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx), |
|
hdr->args.count, |
|
hdr->res.count); |
|
set_bit(NFS_LSEG_LAYOUTRETURN, &hdr->lseg->pls_flags); |
|
} |
|
|
|
static int ff_layout_read_prepare_common(struct rpc_task *task, |
|
struct nfs_pgio_header *hdr) |
|
{ |
|
if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) { |
|
rpc_exit(task, -EIO); |
|
return -EIO; |
|
} |
|
|
|
if (!pnfs_is_valid_lseg(hdr->lseg)) { |
|
rpc_exit(task, -EAGAIN); |
|
return -EAGAIN; |
|
} |
|
|
|
ff_layout_read_record_layoutstats_start(task, hdr); |
|
return 0; |
|
} |
|
|
|
/* |
|
* Call ops for the async read/write cases |
|
* In the case of dense layouts, the offset needs to be reset to its |
|
* original value. |
|
*/ |
|
static void ff_layout_read_prepare_v3(struct rpc_task *task, void *data) |
|
{ |
|
struct nfs_pgio_header *hdr = data; |
|
|
|
if (ff_layout_read_prepare_common(task, hdr)) |
|
return; |
|
|
|
rpc_call_start(task); |
|
} |
|
|
|
static void ff_layout_read_prepare_v4(struct rpc_task *task, void *data) |
|
{ |
|
struct nfs_pgio_header *hdr = data; |
|
|
|
if (nfs4_setup_sequence(hdr->ds_clp, |
|
&hdr->args.seq_args, |
|
&hdr->res.seq_res, |
|
task)) |
|
return; |
|
|
|
ff_layout_read_prepare_common(task, hdr); |
|
} |
|
|
|
static void ff_layout_read_call_done(struct rpc_task *task, void *data) |
|
{ |
|
struct nfs_pgio_header *hdr = data; |
|
|
|
if (test_bit(NFS_IOHDR_REDO, &hdr->flags) && |
|
task->tk_status == 0) { |
|
nfs4_sequence_done(task, &hdr->res.seq_res); |
|
return; |
|
} |
|
|
|
/* Note this may cause RPC to be resent */ |
|
hdr->mds_ops->rpc_call_done(task, hdr); |
|
} |
|
|
|
static void ff_layout_read_count_stats(struct rpc_task *task, void *data) |
|
{ |
|
struct nfs_pgio_header *hdr = data; |
|
|
|
ff_layout_read_record_layoutstats_done(task, hdr); |
|
rpc_count_iostats_metrics(task, |
|
&NFS_CLIENT(hdr->inode)->cl_metrics[NFSPROC4_CLNT_READ]); |
|
} |
|
|
|
static void ff_layout_read_release(void *data) |
|
{ |
|
struct nfs_pgio_header *hdr = data; |
|
|
|
ff_layout_read_record_layoutstats_done(&hdr->task, hdr); |
|
if (test_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags)) |
|
ff_layout_resend_pnfs_read(hdr); |
|
else if (test_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags)) |
|
ff_layout_reset_read(hdr); |
|
pnfs_generic_rw_release(data); |
|
} |
|
|
|
|
|
static int ff_layout_write_done_cb(struct rpc_task *task, |
|
struct nfs_pgio_header *hdr) |
|
{ |
|
loff_t end_offs = 0; |
|
int err; |
|
|
|
if (task->tk_status < 0) { |
|
ff_layout_io_track_ds_error(hdr->lseg, hdr->pgio_mirror_idx, |
|
hdr->args.offset, hdr->args.count, |
|
&hdr->res.op_status, OP_WRITE, |
|
task->tk_status); |
|
trace_ff_layout_write_error(hdr); |
|
} |
|
|
|
err = ff_layout_async_handle_error(task, hdr->args.context->state, |
|
hdr->ds_clp, hdr->lseg, |
|
hdr->pgio_mirror_idx); |
|
|
|
trace_nfs4_pnfs_write(hdr, err); |
|
clear_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags); |
|
clear_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags); |
|
switch (err) { |
|
case -NFS4ERR_RESET_TO_PNFS: |
|
set_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags); |
|
return task->tk_status; |
|
case -NFS4ERR_RESET_TO_MDS: |
|
set_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags); |
|
return task->tk_status; |
|
case -EAGAIN: |
|
return -EAGAIN; |
|
} |
|
|
|
if (hdr->res.verf->committed == NFS_FILE_SYNC || |
|
hdr->res.verf->committed == NFS_DATA_SYNC) |
|
end_offs = hdr->mds_offset + (loff_t)hdr->res.count; |
|
|
|
/* Note: if the write is unstable, don't set end_offs until commit */ |
|
ff_layout_set_layoutcommit(hdr->inode, hdr->lseg, end_offs); |
|
|
|
/* zero out fattr since we don't care DS attr at all */ |
|
hdr->fattr.valid = 0; |
|
if (task->tk_status >= 0) |
|
nfs_writeback_update_inode(hdr); |
|
|
|
return 0; |
|
} |
|
|
|
static int ff_layout_commit_done_cb(struct rpc_task *task, |
|
struct nfs_commit_data *data) |
|
{ |
|
int err; |
|
|
|
if (task->tk_status < 0) { |
|
ff_layout_io_track_ds_error(data->lseg, data->ds_commit_index, |
|
data->args.offset, data->args.count, |
|
&data->res.op_status, OP_COMMIT, |
|
task->tk_status); |
|
trace_ff_layout_commit_error(data); |
|
} |
|
|
|
err = ff_layout_async_handle_error(task, NULL, data->ds_clp, |
|
data->lseg, data->ds_commit_index); |
|
|
|
trace_nfs4_pnfs_commit_ds(data, err); |
|
switch (err) { |
|
case -NFS4ERR_RESET_TO_PNFS: |
|
pnfs_generic_prepare_to_resend_writes(data); |
|
return -EAGAIN; |
|
case -NFS4ERR_RESET_TO_MDS: |
|
pnfs_generic_prepare_to_resend_writes(data); |
|
return -EAGAIN; |
|
case -EAGAIN: |
|
rpc_restart_call_prepare(task); |
|
return -EAGAIN; |
|
} |
|
|
|
ff_layout_set_layoutcommit(data->inode, data->lseg, data->lwb); |
|
|
|
return 0; |
|
} |
|
|
|
static void ff_layout_write_record_layoutstats_start(struct rpc_task *task, |
|
struct nfs_pgio_header *hdr) |
|
{ |
|
if (test_and_set_bit(NFS_IOHDR_STAT, &hdr->flags)) |
|
return; |
|
nfs4_ff_layout_stat_io_start_write(hdr->inode, |
|
FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx), |
|
hdr->args.count, |
|
task->tk_start); |
|
} |
|
|
|
static void ff_layout_write_record_layoutstats_done(struct rpc_task *task, |
|
struct nfs_pgio_header *hdr) |
|
{ |
|
if (!test_and_clear_bit(NFS_IOHDR_STAT, &hdr->flags)) |
|
return; |
|
nfs4_ff_layout_stat_io_end_write(task, |
|
FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx), |
|
hdr->args.count, hdr->res.count, |
|
hdr->res.verf->committed); |
|
set_bit(NFS_LSEG_LAYOUTRETURN, &hdr->lseg->pls_flags); |
|
} |
|
|
|
static int ff_layout_write_prepare_common(struct rpc_task *task, |
|
struct nfs_pgio_header *hdr) |
|
{ |
|
if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) { |
|
rpc_exit(task, -EIO); |
|
return -EIO; |
|
} |
|
|
|
if (!pnfs_is_valid_lseg(hdr->lseg)) { |
|
rpc_exit(task, -EAGAIN); |
|
return -EAGAIN; |
|
} |
|
|
|
ff_layout_write_record_layoutstats_start(task, hdr); |
|
return 0; |
|
} |
|
|
|
static void ff_layout_write_prepare_v3(struct rpc_task *task, void *data) |
|
{ |
|
struct nfs_pgio_header *hdr = data; |
|
|
|
if (ff_layout_write_prepare_common(task, hdr)) |
|
return; |
|
|
|
rpc_call_start(task); |
|
} |
|
|
|
static void ff_layout_write_prepare_v4(struct rpc_task *task, void *data) |
|
{ |
|
struct nfs_pgio_header *hdr = data; |
|
|
|
if (nfs4_setup_sequence(hdr->ds_clp, |
|
&hdr->args.seq_args, |
|
&hdr->res.seq_res, |
|
task)) |
|
return; |
|
|
|
ff_layout_write_prepare_common(task, hdr); |
|
} |
|
|
|
static void ff_layout_write_call_done(struct rpc_task *task, void *data) |
|
{ |
|
struct nfs_pgio_header *hdr = data; |
|
|
|
if (test_bit(NFS_IOHDR_REDO, &hdr->flags) && |
|
task->tk_status == 0) { |
|
nfs4_sequence_done(task, &hdr->res.seq_res); |
|
return; |
|
} |
|
|
|
/* Note this may cause RPC to be resent */ |
|
hdr->mds_ops->rpc_call_done(task, hdr); |
|
} |
|
|
|
static void ff_layout_write_count_stats(struct rpc_task *task, void *data) |
|
{ |
|
struct nfs_pgio_header *hdr = data; |
|
|
|
ff_layout_write_record_layoutstats_done(task, hdr); |
|
rpc_count_iostats_metrics(task, |
|
&NFS_CLIENT(hdr->inode)->cl_metrics[NFSPROC4_CLNT_WRITE]); |
|
} |
|
|
|
static void ff_layout_write_release(void *data) |
|
{ |
|
struct nfs_pgio_header *hdr = data; |
|
|
|
ff_layout_write_record_layoutstats_done(&hdr->task, hdr); |
|
if (test_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags)) { |
|
ff_layout_send_layouterror(hdr->lseg); |
|
ff_layout_reset_write(hdr, true); |
|
} else if (test_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags)) |
|
ff_layout_reset_write(hdr, false); |
|
pnfs_generic_rw_release(data); |
|
} |
|
|
|
static void ff_layout_commit_record_layoutstats_start(struct rpc_task *task, |
|
struct nfs_commit_data *cdata) |
|
{ |
|
if (test_and_set_bit(NFS_IOHDR_STAT, &cdata->flags)) |
|
return; |
|
nfs4_ff_layout_stat_io_start_write(cdata->inode, |
|
FF_LAYOUT_COMP(cdata->lseg, cdata->ds_commit_index), |
|
0, task->tk_start); |
|
} |
|
|
|
static void ff_layout_commit_record_layoutstats_done(struct rpc_task *task, |
|
struct nfs_commit_data *cdata) |
|
{ |
|
struct nfs_page *req; |
|
__u64 count = 0; |
|
|
|
if (!test_and_clear_bit(NFS_IOHDR_STAT, &cdata->flags)) |
|
return; |
|
|
|
if (task->tk_status == 0) { |
|
list_for_each_entry(req, &cdata->pages, wb_list) |
|
count += req->wb_bytes; |
|
} |
|
nfs4_ff_layout_stat_io_end_write(task, |
|
FF_LAYOUT_COMP(cdata->lseg, cdata->ds_commit_index), |
|
count, count, NFS_FILE_SYNC); |
|
set_bit(NFS_LSEG_LAYOUTRETURN, &cdata->lseg->pls_flags); |
|
} |
|
|
|
static int ff_layout_commit_prepare_common(struct rpc_task *task, |
|
struct nfs_commit_data *cdata) |
|
{ |
|
if (!pnfs_is_valid_lseg(cdata->lseg)) { |
|
rpc_exit(task, -EAGAIN); |
|
return -EAGAIN; |
|
} |
|
|
|
ff_layout_commit_record_layoutstats_start(task, cdata); |
|
return 0; |
|
} |
|
|
|
static void ff_layout_commit_prepare_v3(struct rpc_task *task, void *data) |
|
{ |
|
if (ff_layout_commit_prepare_common(task, data)) |
|
return; |
|
|
|
rpc_call_start(task); |
|
} |
|
|
|
static void ff_layout_commit_prepare_v4(struct rpc_task *task, void *data) |
|
{ |
|
struct nfs_commit_data *wdata = data; |
|
|
|
if (nfs4_setup_sequence(wdata->ds_clp, |
|
&wdata->args.seq_args, |
|
&wdata->res.seq_res, |
|
task)) |
|
return; |
|
ff_layout_commit_prepare_common(task, data); |
|
} |
|
|
|
static void ff_layout_commit_done(struct rpc_task *task, void *data) |
|
{ |
|
pnfs_generic_write_commit_done(task, data); |
|
} |
|
|
|
static void ff_layout_commit_count_stats(struct rpc_task *task, void *data) |
|
{ |
|
struct nfs_commit_data *cdata = data; |
|
|
|
ff_layout_commit_record_layoutstats_done(task, cdata); |
|
rpc_count_iostats_metrics(task, |
|
&NFS_CLIENT(cdata->inode)->cl_metrics[NFSPROC4_CLNT_COMMIT]); |
|
} |
|
|
|
static void ff_layout_commit_release(void *data) |
|
{ |
|
struct nfs_commit_data *cdata = data; |
|
|
|
ff_layout_commit_record_layoutstats_done(&cdata->task, cdata); |
|
pnfs_generic_commit_release(data); |
|
} |
|
|
|
static const struct rpc_call_ops ff_layout_read_call_ops_v3 = { |
|
.rpc_call_prepare = ff_layout_read_prepare_v3, |
|
.rpc_call_done = ff_layout_read_call_done, |
|
.rpc_count_stats = ff_layout_read_count_stats, |
|
.rpc_release = ff_layout_read_release, |
|
}; |
|
|
|
static const struct rpc_call_ops ff_layout_read_call_ops_v4 = { |
|
.rpc_call_prepare = ff_layout_read_prepare_v4, |
|
.rpc_call_done = ff_layout_read_call_done, |
|
.rpc_count_stats = ff_layout_read_count_stats, |
|
.rpc_release = ff_layout_read_release, |
|
}; |
|
|
|
static const struct rpc_call_ops ff_layout_write_call_ops_v3 = { |
|
.rpc_call_prepare = ff_layout_write_prepare_v3, |
|
.rpc_call_done = ff_layout_write_call_done, |
|
.rpc_count_stats = ff_layout_write_count_stats, |
|
.rpc_release = ff_layout_write_release, |
|
}; |
|
|
|
static const struct rpc_call_ops ff_layout_write_call_ops_v4 = { |
|
.rpc_call_prepare = ff_layout_write_prepare_v4, |
|
.rpc_call_done = ff_layout_write_call_done, |
|
.rpc_count_stats = ff_layout_write_count_stats, |
|
.rpc_release = ff_layout_write_release, |
|
}; |
|
|
|
static const struct rpc_call_ops ff_layout_commit_call_ops_v3 = { |
|
.rpc_call_prepare = ff_layout_commit_prepare_v3, |
|
.rpc_call_done = ff_layout_commit_done, |
|
.rpc_count_stats = ff_layout_commit_count_stats, |
|
.rpc_release = ff_layout_commit_release, |
|
}; |
|
|
|
static const struct rpc_call_ops ff_layout_commit_call_ops_v4 = { |
|
.rpc_call_prepare = ff_layout_commit_prepare_v4, |
|
.rpc_call_done = ff_layout_commit_done, |
|
.rpc_count_stats = ff_layout_commit_count_stats, |
|
.rpc_release = ff_layout_commit_release, |
|
}; |
|
|
|
static enum pnfs_try_status |
|
ff_layout_read_pagelist(struct nfs_pgio_header *hdr) |
|
{ |
|
struct pnfs_layout_segment *lseg = hdr->lseg; |
|
struct nfs4_pnfs_ds *ds; |
|
struct rpc_clnt *ds_clnt; |
|
struct nfs4_ff_layout_mirror *mirror; |
|
const struct cred *ds_cred; |
|
loff_t offset = hdr->args.offset; |
|
u32 idx = hdr->pgio_mirror_idx; |
|
int vers; |
|
struct nfs_fh *fh; |
|
|
|
dprintk("--> %s ino %lu pgbase %u req %zu@%llu\n", |
|
__func__, hdr->inode->i_ino, |
|
hdr->args.pgbase, (size_t)hdr->args.count, offset); |
|
|
|
mirror = FF_LAYOUT_COMP(lseg, idx); |
|
ds = nfs4_ff_layout_prepare_ds(lseg, mirror, false); |
|
if (!ds) |
|
goto out_failed; |
|
|
|
ds_clnt = nfs4_ff_find_or_create_ds_client(mirror, ds->ds_clp, |
|
hdr->inode); |
|
if (IS_ERR(ds_clnt)) |
|
goto out_failed; |
|
|
|
ds_cred = ff_layout_get_ds_cred(mirror, &lseg->pls_range, hdr->cred); |
|
if (!ds_cred) |
|
goto out_failed; |
|
|
|
vers = nfs4_ff_layout_ds_version(mirror); |
|
|
|
dprintk("%s USE DS: %s cl_count %d vers %d\n", __func__, |
|
ds->ds_remotestr, refcount_read(&ds->ds_clp->cl_count), vers); |
|
|
|
hdr->pgio_done_cb = ff_layout_read_done_cb; |
|
refcount_inc(&ds->ds_clp->cl_count); |
|
hdr->ds_clp = ds->ds_clp; |
|
fh = nfs4_ff_layout_select_ds_fh(mirror); |
|
if (fh) |
|
hdr->args.fh = fh; |
|
|
|
nfs4_ff_layout_select_ds_stateid(mirror, &hdr->args.stateid); |
|
|
|
/* |
|
* Note that if we ever decide to split across DSes, |
|
* then we may need to handle dense-like offsets. |
|
*/ |
|
hdr->args.offset = offset; |
|
hdr->mds_offset = offset; |
|
|
|
/* Perform an asynchronous read to ds */ |
|
nfs_initiate_pgio(ds_clnt, hdr, ds_cred, ds->ds_clp->rpc_ops, |
|
vers == 3 ? &ff_layout_read_call_ops_v3 : |
|
&ff_layout_read_call_ops_v4, |
|
0, RPC_TASK_SOFTCONN); |
|
put_cred(ds_cred); |
|
return PNFS_ATTEMPTED; |
|
|
|
out_failed: |
|
if (ff_layout_avoid_mds_available_ds(lseg)) |
|
return PNFS_TRY_AGAIN; |
|
trace_pnfs_mds_fallback_read_pagelist(hdr->inode, |
|
hdr->args.offset, hdr->args.count, |
|
IOMODE_READ, NFS_I(hdr->inode)->layout, lseg); |
|
return PNFS_NOT_ATTEMPTED; |
|
} |
|
|
|
/* Perform async writes. */ |
|
static enum pnfs_try_status |
|
ff_layout_write_pagelist(struct nfs_pgio_header *hdr, int sync) |
|
{ |
|
struct pnfs_layout_segment *lseg = hdr->lseg; |
|
struct nfs4_pnfs_ds *ds; |
|
struct rpc_clnt *ds_clnt; |
|
struct nfs4_ff_layout_mirror *mirror; |
|
const struct cred *ds_cred; |
|
loff_t offset = hdr->args.offset; |
|
int vers; |
|
struct nfs_fh *fh; |
|
u32 idx = hdr->pgio_mirror_idx; |
|
|
|
mirror = FF_LAYOUT_COMP(lseg, idx); |
|
ds = nfs4_ff_layout_prepare_ds(lseg, mirror, true); |
|
if (!ds) |
|
goto out_failed; |
|
|
|
ds_clnt = nfs4_ff_find_or_create_ds_client(mirror, ds->ds_clp, |
|
hdr->inode); |
|
if (IS_ERR(ds_clnt)) |
|
goto out_failed; |
|
|
|
ds_cred = ff_layout_get_ds_cred(mirror, &lseg->pls_range, hdr->cred); |
|
if (!ds_cred) |
|
goto out_failed; |
|
|
|
vers = nfs4_ff_layout_ds_version(mirror); |
|
|
|
dprintk("%s ino %lu sync %d req %zu@%llu DS: %s cl_count %d vers %d\n", |
|
__func__, hdr->inode->i_ino, sync, (size_t) hdr->args.count, |
|
offset, ds->ds_remotestr, refcount_read(&ds->ds_clp->cl_count), |
|
vers); |
|
|
|
hdr->pgio_done_cb = ff_layout_write_done_cb; |
|
refcount_inc(&ds->ds_clp->cl_count); |
|
hdr->ds_clp = ds->ds_clp; |
|
hdr->ds_commit_idx = idx; |
|
fh = nfs4_ff_layout_select_ds_fh(mirror); |
|
if (fh) |
|
hdr->args.fh = fh; |
|
|
|
nfs4_ff_layout_select_ds_stateid(mirror, &hdr->args.stateid); |
|
|
|
/* |
|
* Note that if we ever decide to split across DSes, |
|
* then we may need to handle dense-like offsets. |
|
*/ |
|
hdr->args.offset = offset; |
|
|
|
/* Perform an asynchronous write */ |
|
nfs_initiate_pgio(ds_clnt, hdr, ds_cred, ds->ds_clp->rpc_ops, |
|
vers == 3 ? &ff_layout_write_call_ops_v3 : |
|
&ff_layout_write_call_ops_v4, |
|
sync, RPC_TASK_SOFTCONN); |
|
put_cred(ds_cred); |
|
return PNFS_ATTEMPTED; |
|
|
|
out_failed: |
|
if (ff_layout_avoid_mds_available_ds(lseg)) |
|
return PNFS_TRY_AGAIN; |
|
trace_pnfs_mds_fallback_write_pagelist(hdr->inode, |
|
hdr->args.offset, hdr->args.count, |
|
IOMODE_RW, NFS_I(hdr->inode)->layout, lseg); |
|
return PNFS_NOT_ATTEMPTED; |
|
} |
|
|
|
static u32 calc_ds_index_from_commit(struct pnfs_layout_segment *lseg, u32 i) |
|
{ |
|
return i; |
|
} |
|
|
|
static struct nfs_fh * |
|
select_ds_fh_from_commit(struct pnfs_layout_segment *lseg, u32 i) |
|
{ |
|
struct nfs4_ff_layout_segment *flseg = FF_LAYOUT_LSEG(lseg); |
|
|
|
/* FIXME: Assume that there is only one NFS version available |
|
* for the DS. |
|
*/ |
|
return &flseg->mirror_array[i]->fh_versions[0]; |
|
} |
|
|
|
static int ff_layout_initiate_commit(struct nfs_commit_data *data, int how) |
|
{ |
|
struct pnfs_layout_segment *lseg = data->lseg; |
|
struct nfs4_pnfs_ds *ds; |
|
struct rpc_clnt *ds_clnt; |
|
struct nfs4_ff_layout_mirror *mirror; |
|
const struct cred *ds_cred; |
|
u32 idx; |
|
int vers, ret; |
|
struct nfs_fh *fh; |
|
|
|
if (!lseg || !(pnfs_is_valid_lseg(lseg) || |
|
test_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags))) |
|
goto out_err; |
|
|
|
idx = calc_ds_index_from_commit(lseg, data->ds_commit_index); |
|
mirror = FF_LAYOUT_COMP(lseg, idx); |
|
ds = nfs4_ff_layout_prepare_ds(lseg, mirror, true); |
|
if (!ds) |
|
goto out_err; |
|
|
|
ds_clnt = nfs4_ff_find_or_create_ds_client(mirror, ds->ds_clp, |
|
data->inode); |
|
if (IS_ERR(ds_clnt)) |
|
goto out_err; |
|
|
|
ds_cred = ff_layout_get_ds_cred(mirror, &lseg->pls_range, data->cred); |
|
if (!ds_cred) |
|
goto out_err; |
|
|
|
vers = nfs4_ff_layout_ds_version(mirror); |
|
|
|
dprintk("%s ino %lu, how %d cl_count %d vers %d\n", __func__, |
|
data->inode->i_ino, how, refcount_read(&ds->ds_clp->cl_count), |
|
vers); |
|
data->commit_done_cb = ff_layout_commit_done_cb; |
|
data->cred = ds_cred; |
|
refcount_inc(&ds->ds_clp->cl_count); |
|
data->ds_clp = ds->ds_clp; |
|
fh = select_ds_fh_from_commit(lseg, data->ds_commit_index); |
|
if (fh) |
|
data->args.fh = fh; |
|
|
|
ret = nfs_initiate_commit(ds_clnt, data, ds->ds_clp->rpc_ops, |
|
vers == 3 ? &ff_layout_commit_call_ops_v3 : |
|
&ff_layout_commit_call_ops_v4, |
|
how, RPC_TASK_SOFTCONN); |
|
put_cred(ds_cred); |
|
return ret; |
|
out_err: |
|
pnfs_generic_prepare_to_resend_writes(data); |
|
pnfs_generic_commit_release(data); |
|
return -EAGAIN; |
|
} |
|
|
|
static int |
|
ff_layout_commit_pagelist(struct inode *inode, struct list_head *mds_pages, |
|
int how, struct nfs_commit_info *cinfo) |
|
{ |
|
return pnfs_generic_commit_pagelist(inode, mds_pages, how, cinfo, |
|
ff_layout_initiate_commit); |
|
} |
|
|
|
static bool ff_layout_match_rw(const struct rpc_task *task, |
|
const struct nfs_pgio_header *hdr, |
|
const struct pnfs_layout_segment *lseg) |
|
{ |
|
return hdr->lseg == lseg; |
|
} |
|
|
|
static bool ff_layout_match_commit(const struct rpc_task *task, |
|
const struct nfs_commit_data *cdata, |
|
const struct pnfs_layout_segment *lseg) |
|
{ |
|
return cdata->lseg == lseg; |
|
} |
|
|
|
static bool ff_layout_match_io(const struct rpc_task *task, const void *data) |
|
{ |
|
const struct rpc_call_ops *ops = task->tk_ops; |
|
|
|
if (ops == &ff_layout_read_call_ops_v3 || |
|
ops == &ff_layout_read_call_ops_v4 || |
|
ops == &ff_layout_write_call_ops_v3 || |
|
ops == &ff_layout_write_call_ops_v4) |
|
return ff_layout_match_rw(task, task->tk_calldata, data); |
|
if (ops == &ff_layout_commit_call_ops_v3 || |
|
ops == &ff_layout_commit_call_ops_v4) |
|
return ff_layout_match_commit(task, task->tk_calldata, data); |
|
return false; |
|
} |
|
|
|
static void ff_layout_cancel_io(struct pnfs_layout_segment *lseg) |
|
{ |
|
struct nfs4_ff_layout_segment *flseg = FF_LAYOUT_LSEG(lseg); |
|
struct nfs4_ff_layout_mirror *mirror; |
|
struct nfs4_ff_layout_ds *mirror_ds; |
|
struct nfs4_pnfs_ds *ds; |
|
struct nfs_client *ds_clp; |
|
struct rpc_clnt *clnt; |
|
u32 idx; |
|
|
|
for (idx = 0; idx < flseg->mirror_array_cnt; idx++) { |
|
mirror = flseg->mirror_array[idx]; |
|
mirror_ds = mirror->mirror_ds; |
|
if (!mirror_ds) |
|
continue; |
|
ds = mirror->mirror_ds->ds; |
|
if (!ds) |
|
continue; |
|
ds_clp = ds->ds_clp; |
|
if (!ds_clp) |
|
continue; |
|
clnt = ds_clp->cl_rpcclient; |
|
if (!clnt) |
|
continue; |
|
if (!rpc_cancel_tasks(clnt, -EAGAIN, ff_layout_match_io, lseg)) |
|
continue; |
|
rpc_clnt_disconnect(clnt); |
|
} |
|
} |
|
|
|
static struct pnfs_ds_commit_info * |
|
ff_layout_get_ds_info(struct inode *inode) |
|
{ |
|
struct pnfs_layout_hdr *layout = NFS_I(inode)->layout; |
|
|
|
if (layout == NULL) |
|
return NULL; |
|
|
|
return &FF_LAYOUT_FROM_HDR(layout)->commit_info; |
|
} |
|
|
|
static void |
|
ff_layout_setup_ds_info(struct pnfs_ds_commit_info *fl_cinfo, |
|
struct pnfs_layout_segment *lseg) |
|
{ |
|
struct nfs4_ff_layout_segment *flseg = FF_LAYOUT_LSEG(lseg); |
|
struct inode *inode = lseg->pls_layout->plh_inode; |
|
struct pnfs_commit_array *array, *new; |
|
|
|
new = pnfs_alloc_commit_array(flseg->mirror_array_cnt, |
|
nfs_io_gfp_mask()); |
|
if (new) { |
|
spin_lock(&inode->i_lock); |
|
array = pnfs_add_commit_array(fl_cinfo, new, lseg); |
|
spin_unlock(&inode->i_lock); |
|
if (array != new) |
|
pnfs_free_commit_array(new); |
|
} |
|
} |
|
|
|
static void |
|
ff_layout_release_ds_info(struct pnfs_ds_commit_info *fl_cinfo, |
|
struct inode *inode) |
|
{ |
|
spin_lock(&inode->i_lock); |
|
pnfs_generic_ds_cinfo_destroy(fl_cinfo); |
|
spin_unlock(&inode->i_lock); |
|
} |
|
|
|
static void |
|
ff_layout_free_deviceid_node(struct nfs4_deviceid_node *d) |
|
{ |
|
nfs4_ff_layout_free_deviceid(container_of(d, struct nfs4_ff_layout_ds, |
|
id_node)); |
|
} |
|
|
|
static int ff_layout_encode_ioerr(struct xdr_stream *xdr, |
|
const struct nfs4_layoutreturn_args *args, |
|
const struct nfs4_flexfile_layoutreturn_args *ff_args) |
|
{ |
|
__be32 *start; |
|
|
|
start = xdr_reserve_space(xdr, 4); |
|
if (unlikely(!start)) |
|
return -E2BIG; |
|
|
|
*start = cpu_to_be32(ff_args->num_errors); |
|
/* This assume we always return _ALL_ layouts */ |
|
return ff_layout_encode_ds_ioerr(xdr, &ff_args->errors); |
|
} |
|
|
|
static void |
|
encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len) |
|
{ |
|
WARN_ON_ONCE(xdr_stream_encode_opaque_fixed(xdr, buf, len) < 0); |
|
} |
|
|
|
static void |
|
ff_layout_encode_ff_iostat_head(struct xdr_stream *xdr, |
|
const nfs4_stateid *stateid, |
|
const struct nfs42_layoutstat_devinfo *devinfo) |
|
{ |
|
__be32 *p; |
|
|
|
p = xdr_reserve_space(xdr, 8 + 8); |
|
p = xdr_encode_hyper(p, devinfo->offset); |
|
p = xdr_encode_hyper(p, devinfo->length); |
|
encode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE); |
|
p = xdr_reserve_space(xdr, 4*8); |
|
p = xdr_encode_hyper(p, devinfo->read_count); |
|
p = xdr_encode_hyper(p, devinfo->read_bytes); |
|
p = xdr_encode_hyper(p, devinfo->write_count); |
|
p = xdr_encode_hyper(p, devinfo->write_bytes); |
|
encode_opaque_fixed(xdr, devinfo->dev_id.data, NFS4_DEVICEID4_SIZE); |
|
} |
|
|
|
static void |
|
ff_layout_encode_ff_iostat(struct xdr_stream *xdr, |
|
const nfs4_stateid *stateid, |
|
const struct nfs42_layoutstat_devinfo *devinfo) |
|
{ |
|
ff_layout_encode_ff_iostat_head(xdr, stateid, devinfo); |
|
ff_layout_encode_ff_layoutupdate(xdr, devinfo, |
|
devinfo->ld_private.data); |
|
} |
|
|
|
/* report nothing for now */ |
|
static void ff_layout_encode_iostats_array(struct xdr_stream *xdr, |
|
const struct nfs4_layoutreturn_args *args, |
|
struct nfs4_flexfile_layoutreturn_args *ff_args) |
|
{ |
|
__be32 *p; |
|
int i; |
|
|
|
p = xdr_reserve_space(xdr, 4); |
|
*p = cpu_to_be32(ff_args->num_dev); |
|
for (i = 0; i < ff_args->num_dev; i++) |
|
ff_layout_encode_ff_iostat(xdr, |
|
&args->layout->plh_stateid, |
|
&ff_args->devinfo[i]); |
|
} |
|
|
|
static void |
|
ff_layout_free_iostats_array(struct nfs42_layoutstat_devinfo *devinfo, |
|
unsigned int num_entries) |
|
{ |
|
unsigned int i; |
|
|
|
for (i = 0; i < num_entries; i++) { |
|
if (!devinfo[i].ld_private.ops) |
|
continue; |
|
if (!devinfo[i].ld_private.ops->free) |
|
continue; |
|
devinfo[i].ld_private.ops->free(&devinfo[i].ld_private); |
|
} |
|
} |
|
|
|
static struct nfs4_deviceid_node * |
|
ff_layout_alloc_deviceid_node(struct nfs_server *server, |
|
struct pnfs_device *pdev, gfp_t gfp_flags) |
|
{ |
|
struct nfs4_ff_layout_ds *dsaddr; |
|
|
|
dsaddr = nfs4_ff_alloc_deviceid_node(server, pdev, gfp_flags); |
|
if (!dsaddr) |
|
return NULL; |
|
return &dsaddr->id_node; |
|
} |
|
|
|
static void |
|
ff_layout_encode_layoutreturn(struct xdr_stream *xdr, |
|
const void *voidargs, |
|
const struct nfs4_xdr_opaque_data *ff_opaque) |
|
{ |
|
const struct nfs4_layoutreturn_args *args = voidargs; |
|
struct nfs4_flexfile_layoutreturn_args *ff_args = ff_opaque->data; |
|
struct xdr_buf tmp_buf = { |
|
.head = { |
|
[0] = { |
|
.iov_base = page_address(ff_args->pages[0]), |
|
}, |
|
}, |
|
.buflen = PAGE_SIZE, |
|
}; |
|
struct xdr_stream tmp_xdr; |
|
__be32 *start; |
|
|
|
dprintk("%s: Begin\n", __func__); |
|
|
|
xdr_init_encode(&tmp_xdr, &tmp_buf, NULL, NULL); |
|
|
|
ff_layout_encode_ioerr(&tmp_xdr, args, ff_args); |
|
ff_layout_encode_iostats_array(&tmp_xdr, args, ff_args); |
|
|
|
start = xdr_reserve_space(xdr, 4); |
|
*start = cpu_to_be32(tmp_buf.len); |
|
xdr_write_pages(xdr, ff_args->pages, 0, tmp_buf.len); |
|
|
|
dprintk("%s: Return\n", __func__); |
|
} |
|
|
|
static void |
|
ff_layout_free_layoutreturn(struct nfs4_xdr_opaque_data *args) |
|
{ |
|
struct nfs4_flexfile_layoutreturn_args *ff_args; |
|
|
|
if (!args->data) |
|
return; |
|
ff_args = args->data; |
|
args->data = NULL; |
|
|
|
ff_layout_free_ds_ioerr(&ff_args->errors); |
|
ff_layout_free_iostats_array(ff_args->devinfo, ff_args->num_dev); |
|
|
|
put_page(ff_args->pages[0]); |
|
kfree(ff_args); |
|
} |
|
|
|
static const struct nfs4_xdr_opaque_ops layoutreturn_ops = { |
|
.encode = ff_layout_encode_layoutreturn, |
|
.free = ff_layout_free_layoutreturn, |
|
}; |
|
|
|
static int |
|
ff_layout_prepare_layoutreturn(struct nfs4_layoutreturn_args *args) |
|
{ |
|
struct nfs4_flexfile_layoutreturn_args *ff_args; |
|
struct nfs4_flexfile_layout *ff_layout = FF_LAYOUT_FROM_HDR(args->layout); |
|
|
|
ff_args = kmalloc(sizeof(*ff_args), nfs_io_gfp_mask()); |
|
if (!ff_args) |
|
goto out_nomem; |
|
ff_args->pages[0] = alloc_page(nfs_io_gfp_mask()); |
|
if (!ff_args->pages[0]) |
|
goto out_nomem_free; |
|
|
|
INIT_LIST_HEAD(&ff_args->errors); |
|
ff_args->num_errors = ff_layout_fetch_ds_ioerr(args->layout, |
|
&args->range, &ff_args->errors, |
|
FF_LAYOUTRETURN_MAXERR); |
|
|
|
spin_lock(&args->inode->i_lock); |
|
ff_args->num_dev = ff_layout_mirror_prepare_stats( |
|
&ff_layout->generic_hdr, &ff_args->devinfo[0], |
|
ARRAY_SIZE(ff_args->devinfo), NFS4_FF_OP_LAYOUTRETURN); |
|
spin_unlock(&args->inode->i_lock); |
|
|
|
args->ld_private->ops = &layoutreturn_ops; |
|
args->ld_private->data = ff_args; |
|
return 0; |
|
out_nomem_free: |
|
kfree(ff_args); |
|
out_nomem: |
|
return -ENOMEM; |
|
} |
|
|
|
#ifdef CONFIG_NFS_V4_2 |
|
void |
|
ff_layout_send_layouterror(struct pnfs_layout_segment *lseg) |
|
{ |
|
struct pnfs_layout_hdr *lo = lseg->pls_layout; |
|
struct nfs42_layout_error *errors; |
|
LIST_HEAD(head); |
|
|
|
if (!nfs_server_capable(lo->plh_inode, NFS_CAP_LAYOUTERROR)) |
|
return; |
|
ff_layout_fetch_ds_ioerr(lo, &lseg->pls_range, &head, -1); |
|
if (list_empty(&head)) |
|
return; |
|
|
|
errors = kmalloc_array(NFS42_LAYOUTERROR_MAX, sizeof(*errors), |
|
nfs_io_gfp_mask()); |
|
if (errors != NULL) { |
|
const struct nfs4_ff_layout_ds_err *pos; |
|
size_t n = 0; |
|
|
|
list_for_each_entry(pos, &head, list) { |
|
errors[n].offset = pos->offset; |
|
errors[n].length = pos->length; |
|
nfs4_stateid_copy(&errors[n].stateid, &pos->stateid); |
|
errors[n].errors[0].dev_id = pos->deviceid; |
|
errors[n].errors[0].status = pos->status; |
|
errors[n].errors[0].opnum = pos->opnum; |
|
n++; |
|
if (!list_is_last(&pos->list, &head) && |
|
n < NFS42_LAYOUTERROR_MAX) |
|
continue; |
|
if (nfs42_proc_layouterror(lseg, errors, n) < 0) |
|
break; |
|
n = 0; |
|
} |
|
kfree(errors); |
|
} |
|
ff_layout_free_ds_ioerr(&head); |
|
} |
|
#else |
|
void |
|
ff_layout_send_layouterror(struct pnfs_layout_segment *lseg) |
|
{ |
|
} |
|
#endif |
|
|
|
static int |
|
ff_layout_ntop4(const struct sockaddr *sap, char *buf, const size_t buflen) |
|
{ |
|
const struct sockaddr_in *sin = (struct sockaddr_in *)sap; |
|
|
|
return snprintf(buf, buflen, "%pI4", &sin->sin_addr); |
|
} |
|
|
|
static size_t |
|
ff_layout_ntop6_noscopeid(const struct sockaddr *sap, char *buf, |
|
const int buflen) |
|
{ |
|
const struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap; |
|
const struct in6_addr *addr = &sin6->sin6_addr; |
|
|
|
/* |
|
* RFC 4291, Section 2.2.2 |
|
* |
|
* Shorthanded ANY address |
|
*/ |
|
if (ipv6_addr_any(addr)) |
|
return snprintf(buf, buflen, "::"); |
|
|
|
/* |
|
* RFC 4291, Section 2.2.2 |
|
* |
|
* Shorthanded loopback address |
|
*/ |
|
if (ipv6_addr_loopback(addr)) |
|
return snprintf(buf, buflen, "::1"); |
|
|
|
/* |
|
* RFC 4291, Section 2.2.3 |
|
* |
|
* Special presentation address format for mapped v4 |
|
* addresses. |
|
*/ |
|
if (ipv6_addr_v4mapped(addr)) |
|
return snprintf(buf, buflen, "::ffff:%pI4", |
|
&addr->s6_addr32[3]); |
|
|
|
/* |
|
* RFC 4291, Section 2.2.1 |
|
*/ |
|
return snprintf(buf, buflen, "%pI6c", addr); |
|
} |
|
|
|
/* Derived from rpc_sockaddr2uaddr */ |
|
static void |
|
ff_layout_encode_netaddr(struct xdr_stream *xdr, struct nfs4_pnfs_ds_addr *da) |
|
{ |
|
struct sockaddr *sap = (struct sockaddr *)&da->da_addr; |
|
char portbuf[RPCBIND_MAXUADDRPLEN]; |
|
char addrbuf[RPCBIND_MAXUADDRLEN]; |
|
unsigned short port; |
|
int len, netid_len; |
|
__be32 *p; |
|
|
|
switch (sap->sa_family) { |
|
case AF_INET: |
|
if (ff_layout_ntop4(sap, addrbuf, sizeof(addrbuf)) == 0) |
|
return; |
|
port = ntohs(((struct sockaddr_in *)sap)->sin_port); |
|
break; |
|
case AF_INET6: |
|
if (ff_layout_ntop6_noscopeid(sap, addrbuf, sizeof(addrbuf)) == 0) |
|
return; |
|
port = ntohs(((struct sockaddr_in6 *)sap)->sin6_port); |
|
break; |
|
default: |
|
WARN_ON_ONCE(1); |
|
return; |
|
} |
|
|
|
snprintf(portbuf, sizeof(portbuf), ".%u.%u", port >> 8, port & 0xff); |
|
len = strlcat(addrbuf, portbuf, sizeof(addrbuf)); |
|
|
|
netid_len = strlen(da->da_netid); |
|
p = xdr_reserve_space(xdr, 4 + netid_len); |
|
xdr_encode_opaque(p, da->da_netid, netid_len); |
|
|
|
p = xdr_reserve_space(xdr, 4 + len); |
|
xdr_encode_opaque(p, addrbuf, len); |
|
} |
|
|
|
static void |
|
ff_layout_encode_nfstime(struct xdr_stream *xdr, |
|
ktime_t t) |
|
{ |
|
struct timespec64 ts; |
|
__be32 *p; |
|
|
|
p = xdr_reserve_space(xdr, 12); |
|
ts = ktime_to_timespec64(t); |
|
p = xdr_encode_hyper(p, ts.tv_sec); |
|
*p++ = cpu_to_be32(ts.tv_nsec); |
|
} |
|
|
|
static void |
|
ff_layout_encode_io_latency(struct xdr_stream *xdr, |
|
struct nfs4_ff_io_stat *stat) |
|
{ |
|
__be32 *p; |
|
|
|
p = xdr_reserve_space(xdr, 5 * 8); |
|
p = xdr_encode_hyper(p, stat->ops_requested); |
|
p = xdr_encode_hyper(p, stat->bytes_requested); |
|
p = xdr_encode_hyper(p, stat->ops_completed); |
|
p = xdr_encode_hyper(p, stat->bytes_completed); |
|
p = xdr_encode_hyper(p, stat->bytes_not_delivered); |
|
ff_layout_encode_nfstime(xdr, stat->total_busy_time); |
|
ff_layout_encode_nfstime(xdr, stat->aggregate_completion_time); |
|
} |
|
|
|
static void |
|
ff_layout_encode_ff_layoutupdate(struct xdr_stream *xdr, |
|
const struct nfs42_layoutstat_devinfo *devinfo, |
|
struct nfs4_ff_layout_mirror *mirror) |
|
{ |
|
struct nfs4_pnfs_ds_addr *da; |
|
struct nfs4_pnfs_ds *ds = mirror->mirror_ds->ds; |
|
struct nfs_fh *fh = &mirror->fh_versions[0]; |
|
__be32 *p; |
|
|
|
da = list_first_entry(&ds->ds_addrs, struct nfs4_pnfs_ds_addr, da_node); |
|
dprintk("%s: DS %s: encoding address %s\n", |
|
__func__, ds->ds_remotestr, da->da_remotestr); |
|
/* netaddr4 */ |
|
ff_layout_encode_netaddr(xdr, da); |
|
/* nfs_fh4 */ |
|
p = xdr_reserve_space(xdr, 4 + fh->size); |
|
xdr_encode_opaque(p, fh->data, fh->size); |
|
/* ff_io_latency4 read */ |
|
spin_lock(&mirror->lock); |
|
ff_layout_encode_io_latency(xdr, &mirror->read_stat.io_stat); |
|
/* ff_io_latency4 write */ |
|
ff_layout_encode_io_latency(xdr, &mirror->write_stat.io_stat); |
|
spin_unlock(&mirror->lock); |
|
/* nfstime4 */ |
|
ff_layout_encode_nfstime(xdr, ktime_sub(ktime_get(), mirror->start_time)); |
|
/* bool */ |
|
p = xdr_reserve_space(xdr, 4); |
|
*p = cpu_to_be32(false); |
|
} |
|
|
|
static void |
|
ff_layout_encode_layoutstats(struct xdr_stream *xdr, const void *args, |
|
const struct nfs4_xdr_opaque_data *opaque) |
|
{ |
|
struct nfs42_layoutstat_devinfo *devinfo = container_of(opaque, |
|
struct nfs42_layoutstat_devinfo, ld_private); |
|
__be32 *start; |
|
|
|
/* layoutupdate length */ |
|
start = xdr_reserve_space(xdr, 4); |
|
ff_layout_encode_ff_layoutupdate(xdr, devinfo, opaque->data); |
|
|
|
*start = cpu_to_be32((xdr->p - start - 1) * 4); |
|
} |
|
|
|
static void |
|
ff_layout_free_layoutstats(struct nfs4_xdr_opaque_data *opaque) |
|
{ |
|
struct nfs4_ff_layout_mirror *mirror = opaque->data; |
|
|
|
ff_layout_put_mirror(mirror); |
|
} |
|
|
|
static const struct nfs4_xdr_opaque_ops layoutstat_ops = { |
|
.encode = ff_layout_encode_layoutstats, |
|
.free = ff_layout_free_layoutstats, |
|
}; |
|
|
|
static int |
|
ff_layout_mirror_prepare_stats(struct pnfs_layout_hdr *lo, |
|
struct nfs42_layoutstat_devinfo *devinfo, |
|
int dev_limit, enum nfs4_ff_op_type type) |
|
{ |
|
struct nfs4_flexfile_layout *ff_layout = FF_LAYOUT_FROM_HDR(lo); |
|
struct nfs4_ff_layout_mirror *mirror; |
|
struct nfs4_deviceid_node *dev; |
|
int i = 0; |
|
|
|
list_for_each_entry(mirror, &ff_layout->mirrors, mirrors) { |
|
if (i >= dev_limit) |
|
break; |
|
if (IS_ERR_OR_NULL(mirror->mirror_ds)) |
|
continue; |
|
if (!test_and_clear_bit(NFS4_FF_MIRROR_STAT_AVAIL, |
|
&mirror->flags) && |
|
type != NFS4_FF_OP_LAYOUTRETURN) |
|
continue; |
|
/* mirror refcount put in cleanup_layoutstats */ |
|
if (!refcount_inc_not_zero(&mirror->ref)) |
|
continue; |
|
dev = &mirror->mirror_ds->id_node; |
|
memcpy(&devinfo->dev_id, &dev->deviceid, NFS4_DEVICEID4_SIZE); |
|
devinfo->offset = 0; |
|
devinfo->length = NFS4_MAX_UINT64; |
|
spin_lock(&mirror->lock); |
|
devinfo->read_count = mirror->read_stat.io_stat.ops_completed; |
|
devinfo->read_bytes = mirror->read_stat.io_stat.bytes_completed; |
|
devinfo->write_count = mirror->write_stat.io_stat.ops_completed; |
|
devinfo->write_bytes = mirror->write_stat.io_stat.bytes_completed; |
|
spin_unlock(&mirror->lock); |
|
devinfo->layout_type = LAYOUT_FLEX_FILES; |
|
devinfo->ld_private.ops = &layoutstat_ops; |
|
devinfo->ld_private.data = mirror; |
|
|
|
devinfo++; |
|
i++; |
|
} |
|
return i; |
|
} |
|
|
|
static int |
|
ff_layout_prepare_layoutstats(struct nfs42_layoutstat_args *args) |
|
{ |
|
struct nfs4_flexfile_layout *ff_layout; |
|
const int dev_count = PNFS_LAYOUTSTATS_MAXDEV; |
|
|
|
/* For now, send at most PNFS_LAYOUTSTATS_MAXDEV statistics */ |
|
args->devinfo = kmalloc_array(dev_count, sizeof(*args->devinfo), |
|
nfs_io_gfp_mask()); |
|
if (!args->devinfo) |
|
return -ENOMEM; |
|
|
|
spin_lock(&args->inode->i_lock); |
|
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, |
|
NFS4_FF_OP_LAYOUTSTATS); |
|
spin_unlock(&args->inode->i_lock); |
|
if (!args->num_dev) { |
|
kfree(args->devinfo); |
|
args->devinfo = NULL; |
|
return -ENOENT; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int |
|
ff_layout_set_layoutdriver(struct nfs_server *server, |
|
const struct nfs_fh *dummy) |
|
{ |
|
#if IS_ENABLED(CONFIG_NFS_V4_2) |
|
server->caps |= NFS_CAP_LAYOUTSTATS; |
|
#endif |
|
return 0; |
|
} |
|
|
|
static const struct pnfs_commit_ops ff_layout_commit_ops = { |
|
.setup_ds_info = ff_layout_setup_ds_info, |
|
.release_ds_info = ff_layout_release_ds_info, |
|
.mark_request_commit = pnfs_layout_mark_request_commit, |
|
.clear_request_commit = pnfs_generic_clear_request_commit, |
|
.scan_commit_lists = pnfs_generic_scan_commit_lists, |
|
.recover_commit_reqs = pnfs_generic_recover_commit_reqs, |
|
.commit_pagelist = ff_layout_commit_pagelist, |
|
}; |
|
|
|
static struct pnfs_layoutdriver_type flexfilelayout_type = { |
|
.id = LAYOUT_FLEX_FILES, |
|
.name = "LAYOUT_FLEX_FILES", |
|
.owner = THIS_MODULE, |
|
.flags = PNFS_LAYOUTGET_ON_OPEN, |
|
.max_layoutget_response = 4096, /* 1 page or so... */ |
|
.set_layoutdriver = ff_layout_set_layoutdriver, |
|
.alloc_layout_hdr = ff_layout_alloc_layout_hdr, |
|
.free_layout_hdr = ff_layout_free_layout_hdr, |
|
.alloc_lseg = ff_layout_alloc_lseg, |
|
.free_lseg = ff_layout_free_lseg, |
|
.add_lseg = ff_layout_add_lseg, |
|
.pg_read_ops = &ff_layout_pg_read_ops, |
|
.pg_write_ops = &ff_layout_pg_write_ops, |
|
.get_ds_info = ff_layout_get_ds_info, |
|
.free_deviceid_node = ff_layout_free_deviceid_node, |
|
.read_pagelist = ff_layout_read_pagelist, |
|
.write_pagelist = ff_layout_write_pagelist, |
|
.alloc_deviceid_node = ff_layout_alloc_deviceid_node, |
|
.prepare_layoutreturn = ff_layout_prepare_layoutreturn, |
|
.sync = pnfs_nfs_generic_sync, |
|
.prepare_layoutstats = ff_layout_prepare_layoutstats, |
|
.cancel_io = ff_layout_cancel_io, |
|
}; |
|
|
|
static int __init nfs4flexfilelayout_init(void) |
|
{ |
|
printk(KERN_INFO "%s: NFSv4 Flexfile Layout Driver Registering...\n", |
|
__func__); |
|
return pnfs_register_layoutdriver(&flexfilelayout_type); |
|
} |
|
|
|
static void __exit nfs4flexfilelayout_exit(void) |
|
{ |
|
printk(KERN_INFO "%s: NFSv4 Flexfile Layout Driver Unregistering...\n", |
|
__func__); |
|
pnfs_unregister_layoutdriver(&flexfilelayout_type); |
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} |
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|
|
MODULE_ALIAS("nfs-layouttype4-4"); |
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|
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MODULE_LICENSE("GPL"); |
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MODULE_DESCRIPTION("The NFSv4 flexfile layout driver"); |
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|
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module_init(nfs4flexfilelayout_init); |
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module_exit(nfs4flexfilelayout_exit); |
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|
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module_param(io_maxretrans, ushort, 0644); |
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MODULE_PARM_DESC(io_maxretrans, "The number of times the NFSv4.1 client " |
|
"retries an I/O request before returning an error. ");
|
|
|