561 lines
14 KiB
C
561 lines
14 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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inode_lock(inode);
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err = nfs_sync_inode(inode);
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if (err)
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goto out_unlock;
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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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out_unlock:
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inode_unlock(inode);
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return err;
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}
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static ssize_t _nfs42_proc_copy(struct file *src,
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struct nfs_lock_context *src_lock,
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struct file *dst,
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struct nfs_lock_context *dst_lock,
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struct nfs42_copy_args *args,
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struct nfs42_copy_res *res)
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{
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struct rpc_message msg = {
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.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COPY],
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.rpc_argp = args,
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.rpc_resp = res,
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};
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struct inode *dst_inode = file_inode(dst);
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struct nfs_server *server = NFS_SERVER(dst_inode);
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loff_t pos_src = args->src_pos;
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loff_t pos_dst = args->dst_pos;
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size_t count = args->count;
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int status;
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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 = nfs_filemap_write_and_wait_range(file_inode(src)->i_mapping,
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pos_src, pos_src + (loff_t)count - 1);
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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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status = nfs_sync_inode(dst_inode);
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if (status)
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return status;
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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_COPY;
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if (status)
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return status;
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if (res->write_res.verifier.committed != NFS_FILE_SYNC) {
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status = nfs_commit_file(dst, &res->write_res.verifier.verifier);
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if (status)
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return status;
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}
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truncate_pagecache_range(dst_inode, pos_dst,
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pos_dst + res->write_res.count);
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return res->write_res.count;
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}
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ssize_t nfs42_proc_copy(struct file *src, loff_t pos_src,
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struct file *dst, loff_t pos_dst,
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size_t count)
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{
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struct nfs_server *server = NFS_SERVER(file_inode(dst));
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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 nfs42_copy_args args = {
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.src_fh = NFS_FH(file_inode(src)),
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.src_pos = pos_src,
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.dst_fh = NFS_FH(file_inode(dst)),
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.dst_pos = pos_dst,
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.count = count,
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};
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struct nfs42_copy_res res;
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struct nfs4_exception src_exception = {
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.inode = file_inode(src),
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.stateid = &args.src_stateid,
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};
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struct nfs4_exception dst_exception = {
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.inode = file_inode(dst),
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.stateid = &args.dst_stateid,
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};
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ssize_t err, err2;
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if (!nfs_server_capable(file_inode(dst), NFS_CAP_COPY))
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return -EOPNOTSUPP;
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src_lock = nfs_get_lock_context(nfs_file_open_context(src));
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if (IS_ERR(src_lock))
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return PTR_ERR(src_lock);
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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));
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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.state = dst_lock->open_context->state;
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do {
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inode_lock(file_inode(dst));
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err = _nfs42_proc_copy(src, src_lock,
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dst, dst_lock,
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&args, &res);
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inode_unlock(file_inode(dst));
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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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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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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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status = nfs_filemap_write_and_wait_range(inode->i_mapping,
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offset, LLONG_MAX);
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if (status)
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return status;
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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 inode *inode = data->inode;
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struct nfs_server *server = NFS_SERVER(inode);
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struct pnfs_layout_hdr *lo;
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spin_lock(&inode->i_lock);
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lo = NFS_I(inode)->layout;
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if (!pnfs_layout_is_valid(lo)) {
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spin_unlock(&inode->i_lock);
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rpc_exit(task, 0);
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return;
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}
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nfs4_stateid_copy(&data->args.stateid, &lo->plh_stateid);
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spin_unlock(&inode->i_lock);
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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_ADMIN_REVOKED:
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case -NFS4ERR_DELEG_REVOKED:
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case -NFS4ERR_STALE_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 (pnfs_layout_is_valid(lo) &&
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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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pnfs_mark_layout_stateid_invalid(lo, &head);
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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 -NFS4ERR_OLD_STATEID:
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spin_lock(&inode->i_lock);
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lo = NFS_I(inode)->layout;
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if (pnfs_layout_is_valid(lo) &&
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nfs4_stateid_match_other(&data->args.stateid,
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&lo->plh_stateid)) {
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/* Do we need to delay before resending? */
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if (!nfs4_stateid_is_newer(&lo->plh_stateid,
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&data->args.stateid))
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rpc_delay(task, HZ);
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rpc_restart_call_prepare(task);
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}
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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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}
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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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rpc_put_task(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,
|
|
dst_lock, FMODE_WRITE);
|
|
if (status)
|
|
return status;
|
|
|
|
res.dst_fattr = nfs_alloc_fattr();
|
|
if (!res.dst_fattr)
|
|
return -ENOMEM;
|
|
|
|
status = nfs4_call_sync(server->client, server, msg,
|
|
&args.seq_args, &res.seq_res, 0);
|
|
if (status == 0)
|
|
status = nfs_post_op_update_inode(dst_inode, res.dst_fattr);
|
|
|
|
kfree(res.dst_fattr);
|
|
return status;
|
|
}
|
|
|
|
int nfs42_proc_clone(struct file *src_f, struct file *dst_f,
|
|
loff_t src_offset, loff_t dst_offset, loff_t count)
|
|
{
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLONE],
|
|
};
|
|
struct inode *inode = file_inode(src_f);
|
|
struct nfs_server *server = NFS_SERVER(file_inode(src_f));
|
|
struct nfs_lock_context *src_lock;
|
|
struct nfs_lock_context *dst_lock;
|
|
struct nfs4_exception src_exception = { };
|
|
struct nfs4_exception dst_exception = { };
|
|
int err, err2;
|
|
|
|
if (!nfs_server_capable(inode, NFS_CAP_CLONE))
|
|
return -EOPNOTSUPP;
|
|
|
|
src_lock = nfs_get_lock_context(nfs_file_open_context(src_f));
|
|
if (IS_ERR(src_lock))
|
|
return PTR_ERR(src_lock);
|
|
|
|
src_exception.inode = file_inode(src_f);
|
|
src_exception.state = src_lock->open_context->state;
|
|
|
|
dst_lock = nfs_get_lock_context(nfs_file_open_context(dst_f));
|
|
if (IS_ERR(dst_lock)) {
|
|
err = PTR_ERR(dst_lock);
|
|
goto out_put_src_lock;
|
|
}
|
|
|
|
dst_exception.inode = file_inode(dst_f);
|
|
dst_exception.state = dst_lock->open_context->state;
|
|
|
|
do {
|
|
err = _nfs42_proc_clone(&msg, src_f, dst_f, src_lock, dst_lock,
|
|
src_offset, dst_offset, count);
|
|
if (err == -ENOTSUPP || err == -EOPNOTSUPP) {
|
|
NFS_SERVER(inode)->caps &= ~NFS_CAP_CLONE;
|
|
err = -EOPNOTSUPP;
|
|
break;
|
|
}
|
|
|
|
err2 = nfs4_handle_exception(server, err, &src_exception);
|
|
err = nfs4_handle_exception(server, err, &dst_exception);
|
|
if (!err)
|
|
err = err2;
|
|
} while (src_exception.retry || dst_exception.retry);
|
|
|
|
nfs_put_lock_context(dst_lock);
|
|
out_put_src_lock:
|
|
nfs_put_lock_context(src_lock);
|
|
return err;
|
|
}
|