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NFSv4: Fix reboot recovery in copy offload

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Copy offload code needs to be hooked into the code for handling
NFS4ERR_BAD_STATEID by ensuring that we set the "stateid" field
in struct nfs4_exception.

Reported-by: Olga Kornievskaia <aglo@umich.edu>
Fixes: 2e72448b07 ("NFS: Add COPY nfs operation")
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Cc: stable@vger.kernel.org # v4.7+
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Trond Myklebust 2017-02-17 18:42:32 -05:00 committed by Anna Schumaker
parent df3ab232e4
commit 9d8cacbf56
1 changed files with 37 additions and 26 deletions
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63
fs/nfs/nfs42proc.c
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@ -129,30 +129,26 @@ out_unlock:
return err;
}
static ssize_t _nfs42_proc_copy(struct file *src, loff_t pos_src,
static ssize_t _nfs42_proc_copy(struct file *src,
struct nfs_lock_context *src_lock,
struct file *dst, loff_t pos_dst,
struct file *dst,
struct nfs_lock_context *dst_lock,
size_t count)
struct nfs42_copy_args *args,
struct nfs42_copy_res *res)
{
struct nfs42_copy_args args = {
.src_fh = NFS_FH(file_inode(src)),
.src_pos = pos_src,
.dst_fh = NFS_FH(file_inode(dst)),
.dst_pos = pos_dst,
.count = count,
};
struct nfs42_copy_res res;
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COPY],
.rpc_argp = &args,
.rpc_resp = &res,
.rpc_argp = args,
.rpc_resp = res,
};
struct inode *dst_inode = file_inode(dst);
struct nfs_server *server = NFS_SERVER(dst_inode);
loff_t pos_src = args->src_pos;
loff_t pos_dst = args->dst_pos;
size_t count = args->count;
int status;
status = nfs4_set_rw_stateid(&args.src_stateid, src_lock->open_context,
status = nfs4_set_rw_stateid(&args->src_stateid, src_lock->open_context,
src_lock, FMODE_READ);
if (status)
return status;
@ -162,7 +158,7 @@ static ssize_t _nfs42_proc_copy(struct file *src, loff_t pos_src,
if (status)
return status;
status = nfs4_set_rw_stateid(&args.dst_stateid, dst_lock->open_context,
status = nfs4_set_rw_stateid(&args->dst_stateid, dst_lock->open_context,
dst_lock, FMODE_WRITE);
if (status)
return status;
@ -172,22 +168,22 @@ static ssize_t _nfs42_proc_copy(struct file *src, loff_t pos_src,
return status;
status = nfs4_call_sync(server->client, server, &msg,
&args.seq_args, &res.seq_res, 0);
&args->seq_args, &res->seq_res, 0);
if (status == -ENOTSUPP)
server->caps &= ~NFS_CAP_COPY;
if (status)
return status;
if (res.write_res.verifier.committed != NFS_FILE_SYNC) {
status = nfs_commit_file(dst, &res.write_res.verifier.verifier);
if (res->write_res.verifier.committed != NFS_FILE_SYNC) {
status = nfs_commit_file(dst, &res->write_res.verifier.verifier);
if (status)
return status;
}
truncate_pagecache_range(dst_inode, pos_dst,
pos_dst + res.write_res.count);
pos_dst + res->write_res.count);
return res.write_res.count;
return res->write_res.count;
}
ssize_t nfs42_proc_copy(struct file *src, loff_t pos_src,
@ -197,8 +193,22 @@ ssize_t nfs42_proc_copy(struct file *src, loff_t pos_src,
struct nfs_server *server = NFS_SERVER(file_inode(dst));
struct nfs_lock_context *src_lock;
struct nfs_lock_context *dst_lock;
struct nfs4_exception src_exception = { };
struct nfs4_exception dst_exception = { };
struct nfs42_copy_args args = {
.src_fh = NFS_FH(file_inode(src)),
.src_pos = pos_src,
.dst_fh = NFS_FH(file_inode(dst)),
.dst_pos = pos_dst,
.count = count,
};
struct nfs42_copy_res res;
struct nfs4_exception src_exception = {
.inode = file_inode(src),
.stateid = &args.src_stateid,
};
struct nfs4_exception dst_exception = {
.inode = file_inode(dst),
.stateid = &args.dst_stateid,
};
ssize_t err, err2;
if (!nfs_server_capable(file_inode(dst), NFS_CAP_COPY))
@ -208,7 +218,6 @@ ssize_t nfs42_proc_copy(struct file *src, loff_t pos_src,
if (IS_ERR(src_lock))
return PTR_ERR(src_lock);
src_exception.inode = file_inode(src);
src_exception.state = src_lock->open_context->state;
dst_lock = nfs_get_lock_context(nfs_file_open_context(dst));
@ -217,15 +226,17 @@ ssize_t nfs42_proc_copy(struct file *src, loff_t pos_src,
goto out_put_src_lock;
}
dst_exception.inode = file_inode(dst);
dst_exception.state = dst_lock->open_context->state;
do {
inode_lock(file_inode(dst));
err = _nfs42_proc_copy(src, pos_src, src_lock,
dst, pos_dst, dst_lock, count);
err = _nfs42_proc_copy(src, src_lock,
dst, dst_lock,
&args, &res);
inode_unlock(file_inode(dst));
if (err >= 0)
break;
if (err == -ENOTSUPP) {
err = -EOPNOTSUPP;
break;