![Olga Kornievskaia](/assets/img/avatar_default.png)
If we fail to find a good deviceid while trying to pnfs instead of
propogating an error back fallback to doing IO to the MDS. Currently,
code with fals the IO with EINVAL.
Signed-off-by: Olga Kornievskaia <kolga@netapp.com>
Fixes: 8d40b0f148
("NFS filelayout:call GETDEVICEINFO after pnfs_layout_process completes"
Cc: stable@vger.kernel.org # v4.11+
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
1206 lines
32 KiB
C
1206 lines
32 KiB
C
/*
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* Module for the pnfs nfs4 file layout driver.
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* Defines all I/O and Policy interface operations, plus code
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* to register itself with the pNFS client.
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*
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* Copyright (c) 2002
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* The Regents of the University of Michigan
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* All Rights Reserved
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*
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* Dean Hildebrand <dhildebz@umich.edu>
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*
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* Permission is granted to use, copy, create derivative works, and
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* redistribute this software and such derivative works for any purpose,
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* so long as the name of the University of Michigan is not used in
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* any advertising or publicity pertaining to the use or distribution
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* of this software without specific, written prior authorization. If
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* the above copyright notice or any other identification of the
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* University of Michigan is included in any copy of any portion of
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* this software, then the disclaimer below must also be included.
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*
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* This software is provided as is, without representation or warranty
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* of any kind either express or implied, including without limitation
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* the implied warranties of merchantability, fitness for a particular
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* purpose, or noninfringement. The Regents of the University of
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* Michigan shall not be liable for any damages, including special,
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* indirect, incidental, or consequential damages, with respect to any
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* claim arising out of or in connection with the use of the software,
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* even if it has been or is hereafter advised of the possibility of
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* such damages.
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*/
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#include <linux/nfs_fs.h>
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#include <linux/nfs_page.h>
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#include <linux/module.h>
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#include <linux/backing-dev.h>
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#include <linux/sunrpc/metrics.h>
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#include "../nfs4session.h"
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#include "../internal.h"
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#include "../delegation.h"
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#include "filelayout.h"
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#include "../nfs4trace.h"
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#define NFSDBG_FACILITY NFSDBG_PNFS_LD
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Dean Hildebrand <dhildebz@umich.edu>");
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MODULE_DESCRIPTION("The NFSv4 file layout driver");
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#define FILELAYOUT_POLL_RETRY_MAX (15*HZ)
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static loff_t
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filelayout_get_dense_offset(struct nfs4_filelayout_segment *flseg,
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loff_t offset)
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{
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u32 stripe_width = flseg->stripe_unit * flseg->dsaddr->stripe_count;
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u64 stripe_no;
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u32 rem;
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offset -= flseg->pattern_offset;
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stripe_no = div_u64(offset, stripe_width);
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div_u64_rem(offset, flseg->stripe_unit, &rem);
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return stripe_no * flseg->stripe_unit + rem;
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}
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/* This function is used by the layout driver to calculate the
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* offset of the file on the dserver based on whether the
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* layout type is STRIPE_DENSE or STRIPE_SPARSE
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*/
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static loff_t
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filelayout_get_dserver_offset(struct pnfs_layout_segment *lseg, loff_t offset)
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{
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struct nfs4_filelayout_segment *flseg = FILELAYOUT_LSEG(lseg);
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switch (flseg->stripe_type) {
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case STRIPE_SPARSE:
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return offset;
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case STRIPE_DENSE:
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return filelayout_get_dense_offset(flseg, offset);
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}
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BUG();
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}
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static void filelayout_reset_write(struct nfs_pgio_header *hdr)
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{
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struct rpc_task *task = &hdr->task;
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if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) {
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dprintk("%s Reset task %5u for i/o through MDS "
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"(req %s/%llu, %u bytes @ offset %llu)\n", __func__,
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hdr->task.tk_pid,
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hdr->inode->i_sb->s_id,
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(unsigned long long)NFS_FILEID(hdr->inode),
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hdr->args.count,
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(unsigned long long)hdr->args.offset);
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task->tk_status = pnfs_write_done_resend_to_mds(hdr);
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}
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}
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static void filelayout_reset_read(struct nfs_pgio_header *hdr)
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{
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struct rpc_task *task = &hdr->task;
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if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) {
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dprintk("%s Reset task %5u for i/o through MDS "
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"(req %s/%llu, %u bytes @ offset %llu)\n", __func__,
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hdr->task.tk_pid,
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hdr->inode->i_sb->s_id,
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(unsigned long long)NFS_FILEID(hdr->inode),
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hdr->args.count,
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(unsigned long long)hdr->args.offset);
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task->tk_status = pnfs_read_done_resend_to_mds(hdr);
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}
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}
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static int filelayout_async_handle_error(struct rpc_task *task,
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struct nfs4_state *state,
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struct nfs_client *clp,
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struct pnfs_layout_segment *lseg)
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{
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struct pnfs_layout_hdr *lo = lseg->pls_layout;
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struct inode *inode = lo->plh_inode;
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struct nfs4_deviceid_node *devid = FILELAYOUT_DEVID_NODE(lseg);
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struct nfs4_slot_table *tbl = &clp->cl_session->fc_slot_table;
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if (task->tk_status >= 0)
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return 0;
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switch (task->tk_status) {
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/* DS session errors */
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case -NFS4ERR_BADSESSION:
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case -NFS4ERR_BADSLOT:
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case -NFS4ERR_BAD_HIGH_SLOT:
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case -NFS4ERR_DEADSESSION:
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case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
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case -NFS4ERR_SEQ_FALSE_RETRY:
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case -NFS4ERR_SEQ_MISORDERED:
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dprintk("%s ERROR %d, Reset session. Exchangeid "
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"flags 0x%x\n", __func__, task->tk_status,
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clp->cl_exchange_flags);
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nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
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break;
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case -NFS4ERR_DELAY:
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case -NFS4ERR_GRACE:
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rpc_delay(task, FILELAYOUT_POLL_RETRY_MAX);
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break;
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case -NFS4ERR_RETRY_UNCACHED_REP:
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break;
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/* Invalidate Layout errors */
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case -NFS4ERR_ACCESS:
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case -NFS4ERR_PNFS_NO_LAYOUT:
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case -ESTALE: /* mapped NFS4ERR_STALE */
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case -EBADHANDLE: /* mapped NFS4ERR_BADHANDLE */
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case -EISDIR: /* mapped NFS4ERR_ISDIR */
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case -NFS4ERR_FHEXPIRED:
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case -NFS4ERR_WRONG_TYPE:
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dprintk("%s Invalid layout error %d\n", __func__,
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task->tk_status);
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/*
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* Destroy layout so new i/o will get a new layout.
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* Layout will not be destroyed until all current lseg
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* references are put. Mark layout as invalid to resend failed
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* i/o and all i/o waiting on the slot table to the MDS until
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* layout is destroyed and a new valid layout is obtained.
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*/
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pnfs_destroy_layout(NFS_I(inode));
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rpc_wake_up(&tbl->slot_tbl_waitq);
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goto reset;
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/* RPC connection errors */
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case -ECONNREFUSED:
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case -EHOSTDOWN:
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case -EHOSTUNREACH:
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case -ENETUNREACH:
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case -EIO:
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case -ETIMEDOUT:
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case -EPIPE:
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dprintk("%s DS connection error %d\n", __func__,
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task->tk_status);
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nfs4_mark_deviceid_unavailable(devid);
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pnfs_error_mark_layout_for_return(inode, lseg);
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pnfs_set_lo_fail(lseg);
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rpc_wake_up(&tbl->slot_tbl_waitq);
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/* fall through */
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default:
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reset:
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dprintk("%s Retry through MDS. Error %d\n", __func__,
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task->tk_status);
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return -NFS4ERR_RESET_TO_MDS;
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}
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task->tk_status = 0;
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return -EAGAIN;
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}
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/* NFS_PROTO call done callback routines */
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static int filelayout_read_done_cb(struct rpc_task *task,
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struct nfs_pgio_header *hdr)
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{
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int err;
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trace_nfs4_pnfs_read(hdr, task->tk_status);
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err = filelayout_async_handle_error(task, hdr->args.context->state,
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hdr->ds_clp, hdr->lseg);
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switch (err) {
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case -NFS4ERR_RESET_TO_MDS:
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filelayout_reset_read(hdr);
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return task->tk_status;
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case -EAGAIN:
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rpc_restart_call_prepare(task);
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return -EAGAIN;
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}
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return 0;
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}
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/*
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* We reference the rpc_cred of the first WRITE that triggers the need for
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* a LAYOUTCOMMIT, and use it to send the layoutcommit compound.
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* rfc5661 is not clear about which credential should be used.
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*/
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static void
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filelayout_set_layoutcommit(struct nfs_pgio_header *hdr)
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{
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loff_t end_offs = 0;
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if (FILELAYOUT_LSEG(hdr->lseg)->commit_through_mds ||
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hdr->res.verf->committed == NFS_FILE_SYNC)
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return;
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if (hdr->res.verf->committed == NFS_DATA_SYNC)
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end_offs = hdr->mds_offset + (loff_t)hdr->res.count;
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/* Note: if the write is unstable, don't set end_offs until commit */
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pnfs_set_layoutcommit(hdr->inode, hdr->lseg, end_offs);
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dprintk("%s inode %lu pls_end_pos %lu\n", __func__, hdr->inode->i_ino,
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(unsigned long) NFS_I(hdr->inode)->layout->plh_lwb);
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}
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bool
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filelayout_test_devid_unavailable(struct nfs4_deviceid_node *node)
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{
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return filelayout_test_devid_invalid(node) ||
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nfs4_test_deviceid_unavailable(node);
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}
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static bool
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filelayout_reset_to_mds(struct pnfs_layout_segment *lseg)
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{
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struct nfs4_deviceid_node *node = FILELAYOUT_DEVID_NODE(lseg);
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return filelayout_test_devid_unavailable(node);
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}
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/*
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* Call ops for the async read/write cases
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* In the case of dense layouts, the offset needs to be reset to its
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* original value.
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*/
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static void filelayout_read_prepare(struct rpc_task *task, void *data)
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{
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struct nfs_pgio_header *hdr = data;
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if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) {
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rpc_exit(task, -EIO);
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return;
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}
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if (filelayout_reset_to_mds(hdr->lseg)) {
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dprintk("%s task %u reset io to MDS\n", __func__, task->tk_pid);
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filelayout_reset_read(hdr);
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rpc_exit(task, 0);
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return;
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}
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hdr->pgio_done_cb = filelayout_read_done_cb;
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if (nfs4_setup_sequence(hdr->ds_clp,
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&hdr->args.seq_args,
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&hdr->res.seq_res,
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task))
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return;
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if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
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hdr->args.lock_context, FMODE_READ) == -EIO)
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rpc_exit(task, -EIO); /* lost lock, terminate I/O */
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}
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static void filelayout_read_call_done(struct rpc_task *task, void *data)
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{
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struct nfs_pgio_header *hdr = data;
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dprintk("--> %s task->tk_status %d\n", __func__, task->tk_status);
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if (test_bit(NFS_IOHDR_REDO, &hdr->flags) &&
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task->tk_status == 0) {
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nfs41_sequence_done(task, &hdr->res.seq_res);
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return;
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}
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/* Note this may cause RPC to be resent */
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hdr->mds_ops->rpc_call_done(task, data);
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}
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static void filelayout_read_count_stats(struct rpc_task *task, void *data)
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{
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struct nfs_pgio_header *hdr = data;
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rpc_count_iostats(task, NFS_SERVER(hdr->inode)->client->cl_metrics);
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}
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static int filelayout_write_done_cb(struct rpc_task *task,
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struct nfs_pgio_header *hdr)
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{
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int err;
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trace_nfs4_pnfs_write(hdr, task->tk_status);
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err = filelayout_async_handle_error(task, hdr->args.context->state,
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hdr->ds_clp, hdr->lseg);
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switch (err) {
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case -NFS4ERR_RESET_TO_MDS:
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filelayout_reset_write(hdr);
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return task->tk_status;
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case -EAGAIN:
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rpc_restart_call_prepare(task);
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return -EAGAIN;
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}
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filelayout_set_layoutcommit(hdr);
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/* zero out the fattr */
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hdr->fattr.valid = 0;
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if (task->tk_status >= 0)
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nfs_writeback_update_inode(hdr);
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return 0;
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}
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static int filelayout_commit_done_cb(struct rpc_task *task,
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struct nfs_commit_data *data)
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{
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int err;
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trace_nfs4_pnfs_commit_ds(data, task->tk_status);
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err = filelayout_async_handle_error(task, NULL, data->ds_clp,
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data->lseg);
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switch (err) {
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case -NFS4ERR_RESET_TO_MDS:
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pnfs_generic_prepare_to_resend_writes(data);
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return -EAGAIN;
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case -EAGAIN:
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rpc_restart_call_prepare(task);
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return -EAGAIN;
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}
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pnfs_set_layoutcommit(data->inode, data->lseg, data->lwb);
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return 0;
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}
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static void filelayout_write_prepare(struct rpc_task *task, void *data)
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{
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struct nfs_pgio_header *hdr = data;
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if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) {
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rpc_exit(task, -EIO);
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return;
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}
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if (filelayout_reset_to_mds(hdr->lseg)) {
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dprintk("%s task %u reset io to MDS\n", __func__, task->tk_pid);
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filelayout_reset_write(hdr);
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rpc_exit(task, 0);
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return;
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}
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if (nfs4_setup_sequence(hdr->ds_clp,
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&hdr->args.seq_args,
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&hdr->res.seq_res,
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task))
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return;
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if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
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hdr->args.lock_context, FMODE_WRITE) == -EIO)
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rpc_exit(task, -EIO); /* lost lock, terminate I/O */
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}
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static void filelayout_write_call_done(struct rpc_task *task, void *data)
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{
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struct nfs_pgio_header *hdr = data;
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if (test_bit(NFS_IOHDR_REDO, &hdr->flags) &&
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task->tk_status == 0) {
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nfs41_sequence_done(task, &hdr->res.seq_res);
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return;
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}
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/* Note this may cause RPC to be resent */
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hdr->mds_ops->rpc_call_done(task, data);
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}
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static void filelayout_write_count_stats(struct rpc_task *task, void *data)
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{
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struct nfs_pgio_header *hdr = data;
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rpc_count_iostats(task, NFS_SERVER(hdr->inode)->client->cl_metrics);
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}
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static void filelayout_commit_prepare(struct rpc_task *task, void *data)
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{
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struct nfs_commit_data *wdata = data;
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nfs4_setup_sequence(wdata->ds_clp,
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&wdata->args.seq_args,
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&wdata->res.seq_res,
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task);
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}
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static void filelayout_commit_count_stats(struct rpc_task *task, void *data)
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{
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struct nfs_commit_data *cdata = data;
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rpc_count_iostats(task, NFS_SERVER(cdata->inode)->client->cl_metrics);
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}
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static const struct rpc_call_ops filelayout_read_call_ops = {
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.rpc_call_prepare = filelayout_read_prepare,
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.rpc_call_done = filelayout_read_call_done,
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.rpc_count_stats = filelayout_read_count_stats,
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.rpc_release = pnfs_generic_rw_release,
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};
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static const struct rpc_call_ops filelayout_write_call_ops = {
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.rpc_call_prepare = filelayout_write_prepare,
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.rpc_call_done = filelayout_write_call_done,
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.rpc_count_stats = filelayout_write_count_stats,
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.rpc_release = pnfs_generic_rw_release,
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};
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static const struct rpc_call_ops filelayout_commit_call_ops = {
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.rpc_call_prepare = filelayout_commit_prepare,
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.rpc_call_done = pnfs_generic_write_commit_done,
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.rpc_count_stats = filelayout_commit_count_stats,
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.rpc_release = pnfs_generic_commit_release,
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};
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static enum pnfs_try_status
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filelayout_read_pagelist(struct nfs_pgio_header *hdr)
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{
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struct pnfs_layout_segment *lseg = hdr->lseg;
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struct nfs4_pnfs_ds *ds;
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struct rpc_clnt *ds_clnt;
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loff_t offset = hdr->args.offset;
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u32 j, idx;
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struct nfs_fh *fh;
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dprintk("--> %s ino %lu pgbase %u req %zu@%llu\n",
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__func__, hdr->inode->i_ino,
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hdr->args.pgbase, (size_t)hdr->args.count, offset);
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/* Retrieve the correct rpc_client for the byte range */
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j = nfs4_fl_calc_j_index(lseg, offset);
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idx = nfs4_fl_calc_ds_index(lseg, j);
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ds = nfs4_fl_prepare_ds(lseg, idx);
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if (!ds)
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return PNFS_NOT_ATTEMPTED;
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|
|
ds_clnt = nfs4_find_or_create_ds_client(ds->ds_clp, hdr->inode);
|
|
if (IS_ERR(ds_clnt))
|
|
return PNFS_NOT_ATTEMPTED;
|
|
|
|
dprintk("%s USE DS: %s cl_count %d\n", __func__,
|
|
ds->ds_remotestr, refcount_read(&ds->ds_clp->cl_count));
|
|
|
|
/* No multipath support. Use first DS */
|
|
refcount_inc(&ds->ds_clp->cl_count);
|
|
hdr->ds_clp = ds->ds_clp;
|
|
hdr->ds_commit_idx = idx;
|
|
fh = nfs4_fl_select_ds_fh(lseg, j);
|
|
if (fh)
|
|
hdr->args.fh = fh;
|
|
|
|
hdr->args.offset = filelayout_get_dserver_offset(lseg, offset);
|
|
hdr->mds_offset = offset;
|
|
|
|
/* Perform an asynchronous read to ds */
|
|
nfs_initiate_pgio(ds_clnt, hdr, hdr->cred,
|
|
NFS_PROTO(hdr->inode), &filelayout_read_call_ops,
|
|
0, RPC_TASK_SOFTCONN);
|
|
return PNFS_ATTEMPTED;
|
|
}
|
|
|
|
/* Perform async writes. */
|
|
static enum pnfs_try_status
|
|
filelayout_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;
|
|
loff_t offset = hdr->args.offset;
|
|
u32 j, idx;
|
|
struct nfs_fh *fh;
|
|
|
|
/* Retrieve the correct rpc_client for the byte range */
|
|
j = nfs4_fl_calc_j_index(lseg, offset);
|
|
idx = nfs4_fl_calc_ds_index(lseg, j);
|
|
ds = nfs4_fl_prepare_ds(lseg, idx);
|
|
if (!ds)
|
|
return PNFS_NOT_ATTEMPTED;
|
|
|
|
ds_clnt = nfs4_find_or_create_ds_client(ds->ds_clp, hdr->inode);
|
|
if (IS_ERR(ds_clnt))
|
|
return PNFS_NOT_ATTEMPTED;
|
|
|
|
dprintk("%s ino %lu sync %d req %zu@%llu DS: %s cl_count %d\n",
|
|
__func__, hdr->inode->i_ino, sync, (size_t) hdr->args.count,
|
|
offset, ds->ds_remotestr, refcount_read(&ds->ds_clp->cl_count));
|
|
|
|
hdr->pgio_done_cb = filelayout_write_done_cb;
|
|
refcount_inc(&ds->ds_clp->cl_count);
|
|
hdr->ds_clp = ds->ds_clp;
|
|
hdr->ds_commit_idx = idx;
|
|
fh = nfs4_fl_select_ds_fh(lseg, j);
|
|
if (fh)
|
|
hdr->args.fh = fh;
|
|
hdr->args.offset = filelayout_get_dserver_offset(lseg, offset);
|
|
|
|
/* Perform an asynchronous write */
|
|
nfs_initiate_pgio(ds_clnt, hdr, hdr->cred,
|
|
NFS_PROTO(hdr->inode), &filelayout_write_call_ops,
|
|
sync, RPC_TASK_SOFTCONN);
|
|
return PNFS_ATTEMPTED;
|
|
}
|
|
|
|
static int
|
|
filelayout_check_deviceid(struct pnfs_layout_hdr *lo,
|
|
struct nfs4_filelayout_segment *fl,
|
|
gfp_t gfp_flags)
|
|
{
|
|
struct nfs4_deviceid_node *d;
|
|
struct nfs4_file_layout_dsaddr *dsaddr;
|
|
int status = -EINVAL;
|
|
|
|
/* Is the deviceid already set? If so, we're good. */
|
|
if (fl->dsaddr != NULL)
|
|
return 0;
|
|
|
|
/* find and reference the deviceid */
|
|
d = nfs4_find_get_deviceid(NFS_SERVER(lo->plh_inode), &fl->deviceid,
|
|
lo->plh_lc_cred, gfp_flags);
|
|
if (d == NULL)
|
|
goto out;
|
|
|
|
dsaddr = container_of(d, struct nfs4_file_layout_dsaddr, id_node);
|
|
/* Found deviceid is unavailable */
|
|
if (filelayout_test_devid_unavailable(&dsaddr->id_node))
|
|
goto out_put;
|
|
|
|
if (fl->first_stripe_index >= dsaddr->stripe_count) {
|
|
dprintk("%s Bad first_stripe_index %u\n",
|
|
__func__, fl->first_stripe_index);
|
|
goto out_put;
|
|
}
|
|
|
|
if ((fl->stripe_type == STRIPE_SPARSE &&
|
|
fl->num_fh > 1 && fl->num_fh != dsaddr->ds_num) ||
|
|
(fl->stripe_type == STRIPE_DENSE &&
|
|
fl->num_fh != dsaddr->stripe_count)) {
|
|
dprintk("%s num_fh %u not valid for given packing\n",
|
|
__func__, fl->num_fh);
|
|
goto out_put;
|
|
}
|
|
status = 0;
|
|
|
|
/*
|
|
* Atomic compare and xchange to ensure we don't scribble
|
|
* over a non-NULL pointer.
|
|
*/
|
|
if (cmpxchg(&fl->dsaddr, NULL, dsaddr) != NULL)
|
|
goto out_put;
|
|
out:
|
|
return status;
|
|
out_put:
|
|
nfs4_fl_put_deviceid(dsaddr);
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* filelayout_check_layout()
|
|
*
|
|
* Make sure layout segment parameters are sane WRT the device.
|
|
* At this point no generic layer initialization of the lseg has occurred,
|
|
* and nothing has been added to the layout_hdr cache.
|
|
*
|
|
*/
|
|
static int
|
|
filelayout_check_layout(struct pnfs_layout_hdr *lo,
|
|
struct nfs4_filelayout_segment *fl,
|
|
struct nfs4_layoutget_res *lgr,
|
|
gfp_t gfp_flags)
|
|
{
|
|
int status = -EINVAL;
|
|
|
|
dprintk("--> %s\n", __func__);
|
|
|
|
/* FIXME: remove this check when layout segment support is added */
|
|
if (lgr->range.offset != 0 ||
|
|
lgr->range.length != NFS4_MAX_UINT64) {
|
|
dprintk("%s Only whole file layouts supported. Use MDS i/o\n",
|
|
__func__);
|
|
goto out;
|
|
}
|
|
|
|
if (fl->pattern_offset > lgr->range.offset) {
|
|
dprintk("%s pattern_offset %lld too large\n",
|
|
__func__, fl->pattern_offset);
|
|
goto out;
|
|
}
|
|
|
|
if (!fl->stripe_unit) {
|
|
dprintk("%s Invalid stripe unit (%u)\n",
|
|
__func__, fl->stripe_unit);
|
|
goto out;
|
|
}
|
|
|
|
status = 0;
|
|
out:
|
|
dprintk("--> %s returns %d\n", __func__, status);
|
|
return status;
|
|
}
|
|
|
|
static void _filelayout_free_lseg(struct nfs4_filelayout_segment *fl)
|
|
{
|
|
int i;
|
|
|
|
if (fl->fh_array) {
|
|
for (i = 0; i < fl->num_fh; i++) {
|
|
if (!fl->fh_array[i])
|
|
break;
|
|
kfree(fl->fh_array[i]);
|
|
}
|
|
kfree(fl->fh_array);
|
|
}
|
|
kfree(fl);
|
|
}
|
|
|
|
static int
|
|
filelayout_decode_layout(struct pnfs_layout_hdr *flo,
|
|
struct nfs4_filelayout_segment *fl,
|
|
struct nfs4_layoutget_res *lgr,
|
|
gfp_t gfp_flags)
|
|
{
|
|
struct xdr_stream stream;
|
|
struct xdr_buf buf;
|
|
struct page *scratch;
|
|
__be32 *p;
|
|
uint32_t nfl_util;
|
|
int i;
|
|
|
|
dprintk("%s: set_layout_map Begin\n", __func__);
|
|
|
|
scratch = alloc_page(gfp_flags);
|
|
if (!scratch)
|
|
return -ENOMEM;
|
|
|
|
xdr_init_decode_pages(&stream, &buf, lgr->layoutp->pages, lgr->layoutp->len);
|
|
xdr_set_scratch_buffer(&stream, page_address(scratch), PAGE_SIZE);
|
|
|
|
/* 20 = ufl_util (4), first_stripe_index (4), pattern_offset (8),
|
|
* num_fh (4) */
|
|
p = xdr_inline_decode(&stream, NFS4_DEVICEID4_SIZE + 20);
|
|
if (unlikely(!p))
|
|
goto out_err;
|
|
|
|
memcpy(&fl->deviceid, p, sizeof(fl->deviceid));
|
|
p += XDR_QUADLEN(NFS4_DEVICEID4_SIZE);
|
|
nfs4_print_deviceid(&fl->deviceid);
|
|
|
|
nfl_util = be32_to_cpup(p++);
|
|
if (nfl_util & NFL4_UFLG_COMMIT_THRU_MDS)
|
|
fl->commit_through_mds = 1;
|
|
if (nfl_util & NFL4_UFLG_DENSE)
|
|
fl->stripe_type = STRIPE_DENSE;
|
|
else
|
|
fl->stripe_type = STRIPE_SPARSE;
|
|
fl->stripe_unit = nfl_util & ~NFL4_UFLG_MASK;
|
|
|
|
fl->first_stripe_index = be32_to_cpup(p++);
|
|
p = xdr_decode_hyper(p, &fl->pattern_offset);
|
|
fl->num_fh = be32_to_cpup(p++);
|
|
|
|
dprintk("%s: nfl_util 0x%X num_fh %u fsi %u po %llu\n",
|
|
__func__, nfl_util, fl->num_fh, fl->first_stripe_index,
|
|
fl->pattern_offset);
|
|
|
|
/* Note that a zero value for num_fh is legal for STRIPE_SPARSE.
|
|
* Futher checking is done in filelayout_check_layout */
|
|
if (fl->num_fh >
|
|
max(NFS4_PNFS_MAX_STRIPE_CNT, NFS4_PNFS_MAX_MULTI_CNT))
|
|
goto out_err;
|
|
|
|
if (fl->num_fh > 0) {
|
|
fl->fh_array = kcalloc(fl->num_fh, sizeof(fl->fh_array[0]),
|
|
gfp_flags);
|
|
if (!fl->fh_array)
|
|
goto out_err;
|
|
}
|
|
|
|
for (i = 0; i < fl->num_fh; i++) {
|
|
/* Do we want to use a mempool here? */
|
|
fl->fh_array[i] = kmalloc(sizeof(struct nfs_fh), gfp_flags);
|
|
if (!fl->fh_array[i])
|
|
goto out_err;
|
|
|
|
p = xdr_inline_decode(&stream, 4);
|
|
if (unlikely(!p))
|
|
goto out_err;
|
|
fl->fh_array[i]->size = be32_to_cpup(p++);
|
|
if (sizeof(struct nfs_fh) < fl->fh_array[i]->size) {
|
|
printk(KERN_ERR "NFS: Too big fh %d received %d\n",
|
|
i, fl->fh_array[i]->size);
|
|
goto out_err;
|
|
}
|
|
|
|
p = xdr_inline_decode(&stream, fl->fh_array[i]->size);
|
|
if (unlikely(!p))
|
|
goto out_err;
|
|
memcpy(fl->fh_array[i]->data, p, fl->fh_array[i]->size);
|
|
dprintk("DEBUG: %s: fh len %d\n", __func__,
|
|
fl->fh_array[i]->size);
|
|
}
|
|
|
|
__free_page(scratch);
|
|
return 0;
|
|
|
|
out_err:
|
|
__free_page(scratch);
|
|
return -EIO;
|
|
}
|
|
|
|
static void
|
|
filelayout_free_lseg(struct pnfs_layout_segment *lseg)
|
|
{
|
|
struct nfs4_filelayout_segment *fl = FILELAYOUT_LSEG(lseg);
|
|
|
|
dprintk("--> %s\n", __func__);
|
|
if (fl->dsaddr != NULL)
|
|
nfs4_fl_put_deviceid(fl->dsaddr);
|
|
/* This assumes a single RW lseg */
|
|
if (lseg->pls_range.iomode == IOMODE_RW) {
|
|
struct nfs4_filelayout *flo;
|
|
|
|
flo = FILELAYOUT_FROM_HDR(lseg->pls_layout);
|
|
flo->commit_info.nbuckets = 0;
|
|
kfree(flo->commit_info.buckets);
|
|
flo->commit_info.buckets = NULL;
|
|
}
|
|
_filelayout_free_lseg(fl);
|
|
}
|
|
|
|
static int
|
|
filelayout_alloc_commit_info(struct pnfs_layout_segment *lseg,
|
|
struct nfs_commit_info *cinfo,
|
|
gfp_t gfp_flags)
|
|
{
|
|
struct nfs4_filelayout_segment *fl = FILELAYOUT_LSEG(lseg);
|
|
struct pnfs_commit_bucket *buckets;
|
|
int size, i;
|
|
|
|
if (fl->commit_through_mds)
|
|
return 0;
|
|
|
|
size = (fl->stripe_type == STRIPE_SPARSE) ?
|
|
fl->dsaddr->ds_num : fl->dsaddr->stripe_count;
|
|
|
|
if (cinfo->ds->nbuckets >= size) {
|
|
/* This assumes there is only one IOMODE_RW lseg. What
|
|
* we really want to do is have a layout_hdr level
|
|
* dictionary of <multipath_list4, fh> keys, each
|
|
* associated with a struct list_head, populated by calls
|
|
* to filelayout_write_pagelist().
|
|
* */
|
|
return 0;
|
|
}
|
|
|
|
buckets = kcalloc(size, sizeof(struct pnfs_commit_bucket),
|
|
gfp_flags);
|
|
if (!buckets)
|
|
return -ENOMEM;
|
|
for (i = 0; i < size; i++) {
|
|
INIT_LIST_HEAD(&buckets[i].written);
|
|
INIT_LIST_HEAD(&buckets[i].committing);
|
|
/* mark direct verifier as unset */
|
|
buckets[i].direct_verf.committed = NFS_INVALID_STABLE_HOW;
|
|
}
|
|
|
|
spin_lock(&cinfo->inode->i_lock);
|
|
if (cinfo->ds->nbuckets >= size)
|
|
goto out;
|
|
for (i = 0; i < cinfo->ds->nbuckets; i++) {
|
|
list_splice(&cinfo->ds->buckets[i].written,
|
|
&buckets[i].written);
|
|
list_splice(&cinfo->ds->buckets[i].committing,
|
|
&buckets[i].committing);
|
|
buckets[i].direct_verf.committed =
|
|
cinfo->ds->buckets[i].direct_verf.committed;
|
|
buckets[i].wlseg = cinfo->ds->buckets[i].wlseg;
|
|
buckets[i].clseg = cinfo->ds->buckets[i].clseg;
|
|
}
|
|
swap(cinfo->ds->buckets, buckets);
|
|
cinfo->ds->nbuckets = size;
|
|
out:
|
|
spin_unlock(&cinfo->inode->i_lock);
|
|
kfree(buckets);
|
|
return 0;
|
|
}
|
|
|
|
static struct pnfs_layout_segment *
|
|
filelayout_alloc_lseg(struct pnfs_layout_hdr *layoutid,
|
|
struct nfs4_layoutget_res *lgr,
|
|
gfp_t gfp_flags)
|
|
{
|
|
struct nfs4_filelayout_segment *fl;
|
|
int rc;
|
|
|
|
dprintk("--> %s\n", __func__);
|
|
fl = kzalloc(sizeof(*fl), gfp_flags);
|
|
if (!fl)
|
|
return NULL;
|
|
|
|
rc = filelayout_decode_layout(layoutid, fl, lgr, gfp_flags);
|
|
if (rc != 0 || filelayout_check_layout(layoutid, fl, lgr, gfp_flags)) {
|
|
_filelayout_free_lseg(fl);
|
|
return NULL;
|
|
}
|
|
return &fl->generic_hdr;
|
|
}
|
|
|
|
/*
|
|
* filelayout_pg_test(). Called by nfs_can_coalesce_requests()
|
|
*
|
|
* Return 0 if @req cannot be coalesced into @pgio, otherwise return the number
|
|
* of bytes (maximum @req->wb_bytes) that can be coalesced.
|
|
*/
|
|
static size_t
|
|
filelayout_pg_test(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev,
|
|
struct nfs_page *req)
|
|
{
|
|
unsigned int size;
|
|
u64 p_stripe, r_stripe;
|
|
u32 stripe_offset;
|
|
u64 segment_offset = pgio->pg_lseg->pls_range.offset;
|
|
u32 stripe_unit = FILELAYOUT_LSEG(pgio->pg_lseg)->stripe_unit;
|
|
|
|
/* calls nfs_generic_pg_test */
|
|
size = pnfs_generic_pg_test(pgio, prev, req);
|
|
if (!size)
|
|
return 0;
|
|
|
|
/* see if req and prev are in the same stripe */
|
|
if (prev) {
|
|
p_stripe = (u64)req_offset(prev) - segment_offset;
|
|
r_stripe = (u64)req_offset(req) - segment_offset;
|
|
do_div(p_stripe, stripe_unit);
|
|
do_div(r_stripe, stripe_unit);
|
|
|
|
if (p_stripe != r_stripe)
|
|
return 0;
|
|
}
|
|
|
|
/* calculate remaining bytes in the current stripe */
|
|
div_u64_rem((u64)req_offset(req) - segment_offset,
|
|
stripe_unit,
|
|
&stripe_offset);
|
|
WARN_ON_ONCE(stripe_offset > stripe_unit);
|
|
if (stripe_offset >= stripe_unit)
|
|
return 0;
|
|
return min(stripe_unit - (unsigned int)stripe_offset, size);
|
|
}
|
|
|
|
static struct pnfs_layout_segment *
|
|
fl_pnfs_update_layout(struct inode *ino,
|
|
struct nfs_open_context *ctx,
|
|
loff_t pos,
|
|
u64 count,
|
|
enum pnfs_iomode iomode,
|
|
bool strict_iomode,
|
|
gfp_t gfp_flags)
|
|
{
|
|
struct pnfs_layout_segment *lseg = NULL;
|
|
struct pnfs_layout_hdr *lo;
|
|
struct nfs4_filelayout_segment *fl;
|
|
int status;
|
|
|
|
lseg = pnfs_update_layout(ino, ctx, pos, count, iomode, strict_iomode,
|
|
gfp_flags);
|
|
if (IS_ERR_OR_NULL(lseg))
|
|
goto out;
|
|
|
|
lo = NFS_I(ino)->layout;
|
|
fl = FILELAYOUT_LSEG(lseg);
|
|
|
|
status = filelayout_check_deviceid(lo, fl, gfp_flags);
|
|
if (status) {
|
|
pnfs_put_lseg(lseg);
|
|
lseg = NULL;
|
|
}
|
|
out:
|
|
return lseg;
|
|
}
|
|
|
|
static void
|
|
filelayout_pg_init_read(struct nfs_pageio_descriptor *pgio,
|
|
struct nfs_page *req)
|
|
{
|
|
pnfs_generic_pg_check_layout(pgio);
|
|
if (!pgio->pg_lseg) {
|
|
pgio->pg_lseg = fl_pnfs_update_layout(pgio->pg_inode,
|
|
nfs_req_openctx(req),
|
|
0,
|
|
NFS4_MAX_UINT64,
|
|
IOMODE_READ,
|
|
false,
|
|
GFP_KERNEL);
|
|
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 read through mds */
|
|
if (pgio->pg_lseg == NULL)
|
|
nfs_pageio_reset_read_mds(pgio);
|
|
}
|
|
|
|
static void
|
|
filelayout_pg_init_write(struct nfs_pageio_descriptor *pgio,
|
|
struct nfs_page *req)
|
|
{
|
|
struct nfs_commit_info cinfo;
|
|
int status;
|
|
|
|
pnfs_generic_pg_check_layout(pgio);
|
|
if (!pgio->pg_lseg) {
|
|
pgio->pg_lseg = fl_pnfs_update_layout(pgio->pg_inode,
|
|
nfs_req_openctx(req),
|
|
0,
|
|
NFS4_MAX_UINT64,
|
|
IOMODE_RW,
|
|
false,
|
|
GFP_NOFS);
|
|
if (IS_ERR(pgio->pg_lseg)) {
|
|
pgio->pg_error = PTR_ERR(pgio->pg_lseg);
|
|
pgio->pg_lseg = NULL;
|
|
return;
|
|
}
|
|
}
|
|
|
|
/* If no lseg, fall back to write through mds */
|
|
if (pgio->pg_lseg == NULL)
|
|
goto out_mds;
|
|
nfs_init_cinfo(&cinfo, pgio->pg_inode, pgio->pg_dreq);
|
|
status = filelayout_alloc_commit_info(pgio->pg_lseg, &cinfo, GFP_NOFS);
|
|
if (status < 0) {
|
|
pnfs_put_lseg(pgio->pg_lseg);
|
|
pgio->pg_lseg = NULL;
|
|
goto out_mds;
|
|
}
|
|
return;
|
|
out_mds:
|
|
nfs_pageio_reset_write_mds(pgio);
|
|
}
|
|
|
|
static const struct nfs_pageio_ops filelayout_pg_read_ops = {
|
|
.pg_init = filelayout_pg_init_read,
|
|
.pg_test = filelayout_pg_test,
|
|
.pg_doio = pnfs_generic_pg_readpages,
|
|
.pg_cleanup = pnfs_generic_pg_cleanup,
|
|
};
|
|
|
|
static const struct nfs_pageio_ops filelayout_pg_write_ops = {
|
|
.pg_init = filelayout_pg_init_write,
|
|
.pg_test = filelayout_pg_test,
|
|
.pg_doio = pnfs_generic_pg_writepages,
|
|
.pg_cleanup = pnfs_generic_pg_cleanup,
|
|
};
|
|
|
|
static u32 select_bucket_index(struct nfs4_filelayout_segment *fl, u32 j)
|
|
{
|
|
if (fl->stripe_type == STRIPE_SPARSE)
|
|
return nfs4_fl_calc_ds_index(&fl->generic_hdr, j);
|
|
else
|
|
return j;
|
|
}
|
|
|
|
static void
|
|
filelayout_mark_request_commit(struct nfs_page *req,
|
|
struct pnfs_layout_segment *lseg,
|
|
struct nfs_commit_info *cinfo,
|
|
u32 ds_commit_idx)
|
|
|
|
{
|
|
struct nfs4_filelayout_segment *fl = FILELAYOUT_LSEG(lseg);
|
|
u32 i, j;
|
|
|
|
if (fl->commit_through_mds) {
|
|
nfs_request_add_commit_list(req, cinfo);
|
|
} else {
|
|
/* Note that we are calling nfs4_fl_calc_j_index on each page
|
|
* that ends up being committed to a data server. An attractive
|
|
* alternative is to add a field to nfs_write_data and nfs_page
|
|
* to store the value calculated in filelayout_write_pagelist
|
|
* and just use that here.
|
|
*/
|
|
j = nfs4_fl_calc_j_index(lseg, req_offset(req));
|
|
i = select_bucket_index(fl, j);
|
|
pnfs_layout_mark_request_commit(req, lseg, cinfo, i);
|
|
}
|
|
}
|
|
|
|
static u32 calc_ds_index_from_commit(struct pnfs_layout_segment *lseg, u32 i)
|
|
{
|
|
struct nfs4_filelayout_segment *flseg = FILELAYOUT_LSEG(lseg);
|
|
|
|
if (flseg->stripe_type == STRIPE_SPARSE)
|
|
return i;
|
|
else
|
|
return nfs4_fl_calc_ds_index(lseg, i);
|
|
}
|
|
|
|
static struct nfs_fh *
|
|
select_ds_fh_from_commit(struct pnfs_layout_segment *lseg, u32 i)
|
|
{
|
|
struct nfs4_filelayout_segment *flseg = FILELAYOUT_LSEG(lseg);
|
|
|
|
if (flseg->stripe_type == STRIPE_SPARSE) {
|
|
if (flseg->num_fh == 1)
|
|
i = 0;
|
|
else if (flseg->num_fh == 0)
|
|
/* Use the MDS OPEN fh set in nfs_read_rpcsetup */
|
|
return NULL;
|
|
}
|
|
return flseg->fh_array[i];
|
|
}
|
|
|
|
static int filelayout_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;
|
|
u32 idx;
|
|
struct nfs_fh *fh;
|
|
|
|
idx = calc_ds_index_from_commit(lseg, data->ds_commit_index);
|
|
ds = nfs4_fl_prepare_ds(lseg, idx);
|
|
if (!ds)
|
|
goto out_err;
|
|
|
|
ds_clnt = nfs4_find_or_create_ds_client(ds->ds_clp, data->inode);
|
|
if (IS_ERR(ds_clnt))
|
|
goto out_err;
|
|
|
|
dprintk("%s ino %lu, how %d cl_count %d\n", __func__,
|
|
data->inode->i_ino, how, refcount_read(&ds->ds_clp->cl_count));
|
|
data->commit_done_cb = filelayout_commit_done_cb;
|
|
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;
|
|
return nfs_initiate_commit(ds_clnt, data, NFS_PROTO(data->inode),
|
|
&filelayout_commit_call_ops, how,
|
|
RPC_TASK_SOFTCONN);
|
|
out_err:
|
|
pnfs_generic_prepare_to_resend_writes(data);
|
|
pnfs_generic_commit_release(data);
|
|
return -EAGAIN;
|
|
}
|
|
|
|
/* filelayout_search_commit_reqs - Search lists in @cinfo for the head reqest
|
|
* for @page
|
|
* @cinfo - commit info for current inode
|
|
* @page - page to search for matching head request
|
|
*
|
|
* Returns a the head request if one is found, otherwise returns NULL.
|
|
*/
|
|
static struct nfs_page *
|
|
filelayout_search_commit_reqs(struct nfs_commit_info *cinfo, struct page *page)
|
|
{
|
|
struct nfs_page *freq, *t;
|
|
struct pnfs_commit_bucket *b;
|
|
int i;
|
|
|
|
/* Linearly search the commit lists for each bucket until a matching
|
|
* request is found */
|
|
for (i = 0, b = cinfo->ds->buckets; i < cinfo->ds->nbuckets; i++, b++) {
|
|
list_for_each_entry_safe(freq, t, &b->written, wb_list) {
|
|
if (freq->wb_page == page)
|
|
return freq->wb_head;
|
|
}
|
|
list_for_each_entry_safe(freq, t, &b->committing, wb_list) {
|
|
if (freq->wb_page == page)
|
|
return freq->wb_head;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static int
|
|
filelayout_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,
|
|
filelayout_initiate_commit);
|
|
}
|
|
|
|
static struct nfs4_deviceid_node *
|
|
filelayout_alloc_deviceid_node(struct nfs_server *server,
|
|
struct pnfs_device *pdev, gfp_t gfp_flags)
|
|
{
|
|
struct nfs4_file_layout_dsaddr *dsaddr;
|
|
|
|
dsaddr = nfs4_fl_alloc_deviceid_node(server, pdev, gfp_flags);
|
|
if (!dsaddr)
|
|
return NULL;
|
|
return &dsaddr->id_node;
|
|
}
|
|
|
|
static void
|
|
filelayout_free_deviceid_node(struct nfs4_deviceid_node *d)
|
|
{
|
|
nfs4_fl_free_deviceid(container_of(d, struct nfs4_file_layout_dsaddr, id_node));
|
|
}
|
|
|
|
static struct pnfs_layout_hdr *
|
|
filelayout_alloc_layout_hdr(struct inode *inode, gfp_t gfp_flags)
|
|
{
|
|
struct nfs4_filelayout *flo;
|
|
|
|
flo = kzalloc(sizeof(*flo), gfp_flags);
|
|
return flo != NULL ? &flo->generic_hdr : NULL;
|
|
}
|
|
|
|
static void
|
|
filelayout_free_layout_hdr(struct pnfs_layout_hdr *lo)
|
|
{
|
|
kfree(FILELAYOUT_FROM_HDR(lo));
|
|
}
|
|
|
|
static struct pnfs_ds_commit_info *
|
|
filelayout_get_ds_info(struct inode *inode)
|
|
{
|
|
struct pnfs_layout_hdr *layout = NFS_I(inode)->layout;
|
|
|
|
if (layout == NULL)
|
|
return NULL;
|
|
else
|
|
return &FILELAYOUT_FROM_HDR(layout)->commit_info;
|
|
}
|
|
|
|
static struct pnfs_layoutdriver_type filelayout_type = {
|
|
.id = LAYOUT_NFSV4_1_FILES,
|
|
.name = "LAYOUT_NFSV4_1_FILES",
|
|
.owner = THIS_MODULE,
|
|
.max_layoutget_response = 4096, /* 1 page or so... */
|
|
.alloc_layout_hdr = filelayout_alloc_layout_hdr,
|
|
.free_layout_hdr = filelayout_free_layout_hdr,
|
|
.alloc_lseg = filelayout_alloc_lseg,
|
|
.free_lseg = filelayout_free_lseg,
|
|
.pg_read_ops = &filelayout_pg_read_ops,
|
|
.pg_write_ops = &filelayout_pg_write_ops,
|
|
.get_ds_info = &filelayout_get_ds_info,
|
|
.mark_request_commit = filelayout_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,
|
|
.search_commit_reqs = filelayout_search_commit_reqs,
|
|
.commit_pagelist = filelayout_commit_pagelist,
|
|
.read_pagelist = filelayout_read_pagelist,
|
|
.write_pagelist = filelayout_write_pagelist,
|
|
.alloc_deviceid_node = filelayout_alloc_deviceid_node,
|
|
.free_deviceid_node = filelayout_free_deviceid_node,
|
|
.sync = pnfs_nfs_generic_sync,
|
|
};
|
|
|
|
static int __init nfs4filelayout_init(void)
|
|
{
|
|
printk(KERN_INFO "%s: NFSv4 File Layout Driver Registering...\n",
|
|
__func__);
|
|
return pnfs_register_layoutdriver(&filelayout_type);
|
|
}
|
|
|
|
static void __exit nfs4filelayout_exit(void)
|
|
{
|
|
printk(KERN_INFO "%s: NFSv4 File Layout Driver Unregistering...\n",
|
|
__func__);
|
|
pnfs_unregister_layoutdriver(&filelayout_type);
|
|
}
|
|
|
|
MODULE_ALIAS("nfs-layouttype4-1");
|
|
|
|
module_init(nfs4filelayout_init);
|
|
module_exit(nfs4filelayout_exit);
|