mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-01 09:16:38 +07:00
4bdf87ebda
The newly added NFS v4.2 operations (ALLOCATE, DEALLOCATE, SEEK and CLONE) use a helper called nfs42_set_rw_stateid to select a stateid that is sent to the server. But they don't set the inode and state fields in the nfs4_exception structure, and this don't partake in the stateid recovery protocol. Because of this they will simply return errors insted of trying to recover a stateid when the server return a BAD_STATEID error. Additionally CLONE has the problem that it operates on two files and thus two stateids, and thus needs to call the exception handler twice to recover stateids. While we're at it stop grabbing an addititional reference to the open context in all these operations - having the file open guarantees that the open context won't go away. All this can be produces with the generic/168 and generic/170 tests in xfstests which stress the CLONE stateid handling. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
404 lines
10 KiB
C
404 lines
10 KiB
C
/*
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* Copyright (c) 2014 Anna Schumaker <Anna.Schumaker@Netapp.com>
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*/
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#include <linux/fs.h>
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#include <linux/sunrpc/sched.h>
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#include <linux/nfs.h>
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#include <linux/nfs3.h>
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#include <linux/nfs4.h>
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#include <linux/nfs_xdr.h>
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#include <linux/nfs_fs.h>
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#include "nfs4_fs.h"
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#include "nfs42.h"
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#include "iostat.h"
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#include "pnfs.h"
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#include "internal.h"
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#define NFSDBG_FACILITY NFSDBG_PROC
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static int _nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
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struct nfs_lock_context *lock, loff_t offset, loff_t len)
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{
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struct inode *inode = file_inode(filep);
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struct nfs_server *server = NFS_SERVER(inode);
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struct nfs42_falloc_args args = {
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.falloc_fh = NFS_FH(inode),
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.falloc_offset = offset,
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.falloc_length = len,
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.falloc_bitmask = server->cache_consistency_bitmask,
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};
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struct nfs42_falloc_res res = {
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.falloc_server = server,
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};
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int status;
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msg->rpc_argp = &args;
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msg->rpc_resp = &res;
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status = nfs4_set_rw_stateid(&args.falloc_stateid, lock->open_context,
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lock, FMODE_WRITE);
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if (status)
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return status;
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res.falloc_fattr = nfs_alloc_fattr();
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if (!res.falloc_fattr)
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return -ENOMEM;
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status = nfs4_call_sync(server->client, server, msg,
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&args.seq_args, &res.seq_res, 0);
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if (status == 0)
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status = nfs_post_op_update_inode(inode, res.falloc_fattr);
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kfree(res.falloc_fattr);
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return status;
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}
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static int nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
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loff_t offset, loff_t len)
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{
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struct nfs_server *server = NFS_SERVER(file_inode(filep));
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struct nfs4_exception exception = { };
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struct nfs_lock_context *lock;
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int err;
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lock = nfs_get_lock_context(nfs_file_open_context(filep));
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if (IS_ERR(lock))
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return PTR_ERR(lock);
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exception.inode = file_inode(filep);
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exception.state = lock->open_context->state;
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do {
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err = _nfs42_proc_fallocate(msg, filep, lock, offset, len);
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if (err == -ENOTSUPP) {
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err = -EOPNOTSUPP;
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break;
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}
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err = nfs4_handle_exception(server, err, &exception);
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} while (exception.retry);
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nfs_put_lock_context(lock);
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return err;
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}
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int nfs42_proc_allocate(struct file *filep, loff_t offset, loff_t len)
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{
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struct rpc_message msg = {
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.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ALLOCATE],
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};
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struct inode *inode = file_inode(filep);
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int err;
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if (!nfs_server_capable(inode, NFS_CAP_ALLOCATE))
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return -EOPNOTSUPP;
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inode_lock(inode);
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err = nfs42_proc_fallocate(&msg, filep, offset, len);
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if (err == -EOPNOTSUPP)
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NFS_SERVER(inode)->caps &= ~NFS_CAP_ALLOCATE;
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inode_unlock(inode);
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return err;
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}
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int nfs42_proc_deallocate(struct file *filep, loff_t offset, loff_t len)
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{
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struct rpc_message msg = {
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.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DEALLOCATE],
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};
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struct inode *inode = file_inode(filep);
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int err;
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if (!nfs_server_capable(inode, NFS_CAP_DEALLOCATE))
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return -EOPNOTSUPP;
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nfs_wb_all(inode);
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inode_lock(inode);
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err = nfs42_proc_fallocate(&msg, filep, offset, len);
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if (err == 0)
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truncate_pagecache_range(inode, offset, (offset + len) -1);
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if (err == -EOPNOTSUPP)
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NFS_SERVER(inode)->caps &= ~NFS_CAP_DEALLOCATE;
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inode_unlock(inode);
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return err;
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}
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static loff_t _nfs42_proc_llseek(struct file *filep,
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struct nfs_lock_context *lock, loff_t offset, int whence)
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{
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struct inode *inode = file_inode(filep);
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struct nfs42_seek_args args = {
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.sa_fh = NFS_FH(inode),
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.sa_offset = offset,
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.sa_what = (whence == SEEK_HOLE) ?
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NFS4_CONTENT_HOLE : NFS4_CONTENT_DATA,
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};
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struct nfs42_seek_res res;
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struct rpc_message msg = {
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.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEEK],
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.rpc_argp = &args,
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.rpc_resp = &res,
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};
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struct nfs_server *server = NFS_SERVER(inode);
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int status;
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if (!nfs_server_capable(inode, NFS_CAP_SEEK))
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return -ENOTSUPP;
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status = nfs4_set_rw_stateid(&args.sa_stateid, lock->open_context,
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lock, FMODE_READ);
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if (status)
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return status;
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nfs_wb_all(inode);
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status = nfs4_call_sync(server->client, server, &msg,
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&args.seq_args, &res.seq_res, 0);
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if (status == -ENOTSUPP)
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server->caps &= ~NFS_CAP_SEEK;
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if (status)
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return status;
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return vfs_setpos(filep, res.sr_offset, inode->i_sb->s_maxbytes);
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}
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loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence)
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{
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struct nfs_server *server = NFS_SERVER(file_inode(filep));
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struct nfs4_exception exception = { };
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struct nfs_lock_context *lock;
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loff_t err;
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lock = nfs_get_lock_context(nfs_file_open_context(filep));
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if (IS_ERR(lock))
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return PTR_ERR(lock);
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exception.inode = file_inode(filep);
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exception.state = lock->open_context->state;
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do {
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err = _nfs42_proc_llseek(filep, lock, offset, whence);
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if (err >= 0)
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break;
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if (err == -ENOTSUPP) {
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err = -EOPNOTSUPP;
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break;
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}
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err = nfs4_handle_exception(server, err, &exception);
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} while (exception.retry);
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nfs_put_lock_context(lock);
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return err;
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}
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static void
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nfs42_layoutstat_prepare(struct rpc_task *task, void *calldata)
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{
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struct nfs42_layoutstat_data *data = calldata;
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struct nfs_server *server = NFS_SERVER(data->args.inode);
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nfs41_setup_sequence(nfs4_get_session(server), &data->args.seq_args,
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&data->res.seq_res, task);
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}
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static void
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nfs42_layoutstat_done(struct rpc_task *task, void *calldata)
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{
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struct nfs42_layoutstat_data *data = calldata;
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struct inode *inode = data->inode;
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struct pnfs_layout_hdr *lo;
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if (!nfs4_sequence_done(task, &data->res.seq_res))
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return;
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switch (task->tk_status) {
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case 0:
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break;
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case -NFS4ERR_EXPIRED:
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case -NFS4ERR_STALE_STATEID:
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case -NFS4ERR_OLD_STATEID:
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case -NFS4ERR_BAD_STATEID:
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spin_lock(&inode->i_lock);
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lo = NFS_I(inode)->layout;
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if (lo && nfs4_stateid_match(&data->args.stateid,
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&lo->plh_stateid)) {
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LIST_HEAD(head);
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/*
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* Mark the bad layout state as invalid, then retry
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* with the current stateid.
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*/
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set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags);
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pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
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spin_unlock(&inode->i_lock);
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pnfs_free_lseg_list(&head);
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} else
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spin_unlock(&inode->i_lock);
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break;
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case -ENOTSUPP:
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case -EOPNOTSUPP:
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NFS_SERVER(inode)->caps &= ~NFS_CAP_LAYOUTSTATS;
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default:
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break;
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}
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dprintk("%s server returns %d\n", __func__, task->tk_status);
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}
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static void
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nfs42_layoutstat_release(void *calldata)
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{
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struct nfs42_layoutstat_data *data = calldata;
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struct nfs_server *nfss = NFS_SERVER(data->args.inode);
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if (nfss->pnfs_curr_ld->cleanup_layoutstats)
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nfss->pnfs_curr_ld->cleanup_layoutstats(data);
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pnfs_put_layout_hdr(NFS_I(data->args.inode)->layout);
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smp_mb__before_atomic();
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clear_bit(NFS_INO_LAYOUTSTATS, &NFS_I(data->args.inode)->flags);
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smp_mb__after_atomic();
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nfs_iput_and_deactive(data->inode);
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kfree(data->args.devinfo);
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kfree(data);
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}
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static const struct rpc_call_ops nfs42_layoutstat_ops = {
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.rpc_call_prepare = nfs42_layoutstat_prepare,
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.rpc_call_done = nfs42_layoutstat_done,
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.rpc_release = nfs42_layoutstat_release,
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};
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int nfs42_proc_layoutstats_generic(struct nfs_server *server,
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struct nfs42_layoutstat_data *data)
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{
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struct rpc_message msg = {
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.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTSTATS],
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.rpc_argp = &data->args,
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.rpc_resp = &data->res,
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};
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struct rpc_task_setup task_setup = {
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.rpc_client = server->client,
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.rpc_message = &msg,
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.callback_ops = &nfs42_layoutstat_ops,
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.callback_data = data,
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.flags = RPC_TASK_ASYNC,
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};
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struct rpc_task *task;
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data->inode = nfs_igrab_and_active(data->args.inode);
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if (!data->inode) {
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nfs42_layoutstat_release(data);
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return -EAGAIN;
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}
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nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
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task = rpc_run_task(&task_setup);
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if (IS_ERR(task))
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return PTR_ERR(task);
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return 0;
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}
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static int _nfs42_proc_clone(struct rpc_message *msg, struct file *src_f,
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struct file *dst_f, struct nfs_lock_context *src_lock,
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struct nfs_lock_context *dst_lock, loff_t src_offset,
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loff_t dst_offset, loff_t count)
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{
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struct inode *src_inode = file_inode(src_f);
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struct inode *dst_inode = file_inode(dst_f);
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struct nfs_server *server = NFS_SERVER(dst_inode);
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struct nfs42_clone_args args = {
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.src_fh = NFS_FH(src_inode),
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.dst_fh = NFS_FH(dst_inode),
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.src_offset = src_offset,
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.dst_offset = dst_offset,
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.count = count,
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.dst_bitmask = server->cache_consistency_bitmask,
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};
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struct nfs42_clone_res res = {
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.server = server,
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};
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int status;
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msg->rpc_argp = &args;
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msg->rpc_resp = &res;
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status = nfs4_set_rw_stateid(&args.src_stateid, src_lock->open_context,
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src_lock, FMODE_READ);
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if (status)
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return status;
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status = nfs4_set_rw_stateid(&args.dst_stateid, dst_lock->open_context,
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dst_lock, FMODE_WRITE);
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if (status)
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return status;
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res.dst_fattr = nfs_alloc_fattr();
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if (!res.dst_fattr)
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return -ENOMEM;
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status = nfs4_call_sync(server->client, server, msg,
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&args.seq_args, &res.seq_res, 0);
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if (status == 0)
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status = nfs_post_op_update_inode(dst_inode, res.dst_fattr);
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kfree(res.dst_fattr);
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return status;
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}
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int nfs42_proc_clone(struct file *src_f, struct file *dst_f,
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loff_t src_offset, loff_t dst_offset, loff_t count)
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{
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struct rpc_message msg = {
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.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLONE],
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};
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struct inode *inode = file_inode(src_f);
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struct nfs_server *server = NFS_SERVER(file_inode(src_f));
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struct nfs_lock_context *src_lock;
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struct nfs_lock_context *dst_lock;
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struct nfs4_exception src_exception = { };
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struct nfs4_exception dst_exception = { };
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int err, err2;
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if (!nfs_server_capable(inode, NFS_CAP_CLONE))
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return -EOPNOTSUPP;
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src_lock = nfs_get_lock_context(nfs_file_open_context(src_f));
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if (IS_ERR(src_lock))
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return PTR_ERR(src_lock);
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src_exception.inode = file_inode(src_f);
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src_exception.state = src_lock->open_context->state;
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dst_lock = nfs_get_lock_context(nfs_file_open_context(dst_f));
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if (IS_ERR(dst_lock)) {
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err = PTR_ERR(dst_lock);
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goto out_put_src_lock;
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}
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dst_exception.inode = file_inode(dst_f);
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dst_exception.state = dst_lock->open_context->state;
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do {
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err = _nfs42_proc_clone(&msg, src_f, dst_f, src_lock, dst_lock,
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src_offset, dst_offset, count);
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if (err == -ENOTSUPP || err == -EOPNOTSUPP) {
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NFS_SERVER(inode)->caps &= ~NFS_CAP_CLONE;
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err = -EOPNOTSUPP;
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break;
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}
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err2 = nfs4_handle_exception(server, err, &src_exception);
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err = nfs4_handle_exception(server, err, &dst_exception);
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if (!err)
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err = err2;
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} while (src_exception.retry || dst_exception.retry);
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nfs_put_lock_context(dst_lock);
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out_put_src_lock:
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nfs_put_lock_context(src_lock);
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return err;
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}
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