Return-Path: Received: from mail-io0-f195.google.com ([209.85.223.195]:33075 "EHLO mail-io0-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751501AbdF1Ozo (ORCPT ); Wed, 28 Jun 2017 10:55:44 -0400 Received: by mail-io0-f195.google.com with SMTP id j200so5456685ioe.0 for ; Wed, 28 Jun 2017 07:55:43 -0700 (PDT) Subject: Re: [PATCH 3/4] nfs4: add NFSv4 LOOKUPP handlers To: Christoph Hellwig , trond.myklebust@primarydata.com, "J. Bruce Fields" Cc: jlayton@poochiereds.net, linux-nfs@vger.kernel.org References: <20170627154403.20944-1-hch@lst.de> <20170627154403.20944-4-hch@lst.de> From: Anna Schumaker Message-ID: <99a3d554-399f-3d02-2033-3962fc00afea@gmail.com> Date: Wed, 28 Jun 2017 10:55:35 -0400 MIME-Version: 1.0 In-Reply-To: <20170627154403.20944-4-hch@lst.de> Content-Type: text/plain; charset=utf-8 Sender: linux-nfs-owner@vger.kernel.org List-ID: Hi Christoph, On 06/27/2017 11:44 AM, Christoph Hellwig wrote: > From: Jeff Layton > > This will be needed in order to implement the get_parent export op > for nfsd. I think this patch conflicts with your constify and function pointer cleanups from a few weeks ago, and it may need to be updated. Just double checking: Bruce, are you taking the constify series for 4.13? Thanks, Anna > > Signed-off-by: Jeff Layton > --- > fs/nfs/nfs4proc.c | 49 +++++++++++++++++++++++++++++++++ > fs/nfs/nfs4trace.h | 29 ++++++++++++++++++++ > fs/nfs/nfs4xdr.c | 73 +++++++++++++++++++++++++++++++++++++++++++++++++ > include/linux/nfs4.h | 1 + > include/linux/nfs_xdr.h | 17 +++++++++++- > 5 files changed, 168 insertions(+), 1 deletion(-) > > diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c > index c08c46a3b8cd..6fd9eee8e4ee 100644 > --- a/fs/nfs/nfs4proc.c > +++ b/fs/nfs/nfs4proc.c > @@ -3802,6 +3802,54 @@ nfs4_proc_lookup_mountpoint(struct inode *dir, const struct qstr *name, > return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client; > } > > +static int _nfs4_proc_lookupp(struct inode *inode, > + struct nfs_fh *fhandle, struct nfs_fattr *fattr, > + struct nfs4_label *label) > +{ > + struct rpc_clnt *clnt = NFS_CLIENT(inode); > + struct nfs_server *server = NFS_SERVER(inode); > + int status; > + struct nfs4_lookupp_arg args = { > + .bitmask = server->attr_bitmask, > + .fh = NFS_FH(inode), > + }; > + struct nfs4_lookupp_res res = { > + .server = server, > + .fattr = fattr, > + .label = label, > + .fh = fhandle, > + }; > + struct rpc_message msg = { > + .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUPP], > + .rpc_argp = &args, > + .rpc_resp = &res, > + }; > + > + args.bitmask = nfs4_bitmask(server, label); > + > + nfs_fattr_init(fattr); > + > + dprintk("NFS call lookupp ino=0x%lx\n", inode->i_ino); > + status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, > + &res.seq_res, 0); > + dprintk("NFS reply lookupp: %d\n", status); > + return status; > +} > + > +static int nfs4_proc_lookupp(struct inode *inode, struct nfs_fh *fhandle, > + struct nfs_fattr *fattr, struct nfs4_label *label) > +{ > + struct nfs4_exception exception = { }; > + int err; > + do { > + err = _nfs4_proc_lookupp(inode, fhandle, fattr, label); > + trace_nfs4_lookupp(inode, err); > + err = nfs4_handle_exception(NFS_SERVER(inode), err, > + &exception); > + } while (exception.retry); > + return err; > +} > + > static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) > { > struct nfs_server *server = NFS_SERVER(inode); > @@ -9312,6 +9360,7 @@ const struct nfs_rpc_ops nfs_v4_clientops = { > .getattr = nfs4_proc_getattr, > .setattr = nfs4_proc_setattr, > .lookup = nfs4_proc_lookup, > + .lookupp = nfs4_proc_lookupp, > .access = nfs4_proc_access, > .readlink = nfs4_proc_readlink, > .create = nfs4_proc_create, > diff --git a/fs/nfs/nfs4trace.h b/fs/nfs/nfs4trace.h > index 845d0eadefc9..be1da19c65d6 100644 > --- a/fs/nfs/nfs4trace.h > +++ b/fs/nfs/nfs4trace.h > @@ -891,6 +891,35 @@ DEFINE_NFS4_LOOKUP_EVENT(nfs4_remove); > DEFINE_NFS4_LOOKUP_EVENT(nfs4_get_fs_locations); > DEFINE_NFS4_LOOKUP_EVENT(nfs4_secinfo); > > +TRACE_EVENT(nfs4_lookupp, > + TP_PROTO( > + const struct inode *inode, > + int error > + ), > + > + TP_ARGS(inode, error), > + > + TP_STRUCT__entry( > + __field(dev_t, dev) > + __field(u64, ino) > + __field(int, error) > + ), > + > + TP_fast_assign( > + __entry->dev = inode->i_sb->s_dev; > + __entry->ino = NFS_FILEID(inode); > + __entry->error = error; > + ), > + > + TP_printk( > + "error=%d (%s) inode=%02x:%02x:%llu", > + __entry->error, > + show_nfsv4_errors(__entry->error), > + MAJOR(__entry->dev), MINOR(__entry->dev), > + (unsigned long long)__entry->ino > + ) > +); > + > TRACE_EVENT(nfs4_rename, > TP_PROTO( > const struct inode *olddir, > diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c > index 3aebfdc82b30..b55017987dcd 100644 > --- a/fs/nfs/nfs4xdr.c > +++ b/fs/nfs/nfs4xdr.c > @@ -159,6 +159,8 @@ static int nfs4_stat_to_errno(int); > (op_decode_hdr_maxsz) > #define encode_lookup_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz) > #define decode_lookup_maxsz (op_decode_hdr_maxsz) > +#define encode_lookupp_maxsz (op_encode_hdr_maxsz) > +#define decode_lookupp_maxsz (op_decode_hdr_maxsz) > #define encode_share_access_maxsz \ > (2) > #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz) > @@ -618,6 +620,18 @@ static int nfs4_stat_to_errno(int); > decode_lookup_maxsz + \ > decode_getattr_maxsz + \ > decode_getfh_maxsz) > +#define NFS4_enc_lookupp_sz (compound_encode_hdr_maxsz + \ > + encode_sequence_maxsz + \ > + encode_putfh_maxsz + \ > + encode_lookupp_maxsz + \ > + encode_getattr_maxsz + \ > + encode_getfh_maxsz) > +#define NFS4_dec_lookupp_sz (compound_decode_hdr_maxsz + \ > + decode_sequence_maxsz + \ > + decode_putfh_maxsz + \ > + decode_lookupp_maxsz + \ > + decode_getattr_maxsz + \ > + decode_getfh_maxsz) > #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \ > encode_sequence_maxsz + \ > encode_putrootfh_maxsz + \ > @@ -1368,6 +1382,11 @@ static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struc > encode_string(xdr, name->len, name->name); > } > > +static void encode_lookupp(struct xdr_stream *xdr, struct compound_hdr *hdr) > +{ > + encode_op_hdr(xdr, OP_LOOKUPP, decode_lookupp_maxsz, hdr); > +} > + > static void encode_share_access(struct xdr_stream *xdr, u32 share_access) > { > __be32 *p; > @@ -2120,6 +2139,25 @@ static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr, > } > > /* > + * Encode LOOKUPP request > + */ > +static void nfs4_xdr_enc_lookupp(struct rpc_rqst *req, struct xdr_stream *xdr, > + const struct nfs4_lookupp_arg *args) > +{ > + struct compound_hdr hdr = { > + .minorversion = nfs4_xdr_minorversion(&args->seq_args), > + }; > + > + encode_compound_hdr(xdr, req, &hdr); > + encode_sequence(xdr, &args->seq_args, &hdr); > + encode_putfh(xdr, args->fh, &hdr); > + encode_lookupp(xdr, &hdr); > + encode_getfh(xdr, &hdr); > + encode_getfattr(xdr, args->bitmask, &hdr); > + encode_nops(&hdr); > +} > + > +/* > * Encode LOOKUP_ROOT request > */ > static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, > @@ -5005,6 +5043,11 @@ static int decode_lookup(struct xdr_stream *xdr) > return decode_op_hdr(xdr, OP_LOOKUP); > } > > +static int decode_lookupp(struct xdr_stream *xdr) > +{ > + return decode_op_hdr(xdr, OP_LOOKUPP); > +} > + > /* This is too sick! */ > static int decode_space_limit(struct xdr_stream *xdr, > unsigned long *pagemod_limit) > @@ -6182,6 +6225,35 @@ static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr, > } > > /* > + * Decode LOOKUPP response > + */ > +static int nfs4_xdr_dec_lookupp(struct rpc_rqst *rqstp, struct xdr_stream *xdr, > + struct nfs4_lookupp_res *res) > +{ > + struct compound_hdr hdr; > + int status; > + > + status = decode_compound_hdr(xdr, &hdr); > + if (status) > + goto out; > + status = decode_sequence(xdr, &res->seq_res, rqstp); > + if (status) > + goto out; > + status = decode_putfh(xdr); > + if (status) > + goto out; > + status = decode_lookupp(xdr); > + if (status) > + goto out; > + status = decode_getfh(xdr, res->fh); > + if (status) > + goto out; > + status = decode_getfattr_label(xdr, res->fattr, res->label, res->server); > +out: > + return status; > +} > + > +/* > * Decode LOOKUP_ROOT response > */ > static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, > @@ -7517,6 +7589,7 @@ struct rpc_procinfo nfs4_procedures[] = { > PROC(ACCESS, enc_access, dec_access), > PROC(GETATTR, enc_getattr, dec_getattr), > PROC(LOOKUP, enc_lookup, dec_lookup), > + PROC(LOOKUPP, enc_lookupp, dec_lookupp), > PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root), > PROC(REMOVE, enc_remove, dec_remove), > PROC(RENAME, enc_rename, dec_rename), > diff --git a/include/linux/nfs4.h b/include/linux/nfs4.h > index 1b1ca04820a3..47239c336688 100644 > --- a/include/linux/nfs4.h > +++ b/include/linux/nfs4.h > @@ -479,6 +479,7 @@ enum { > NFSPROC4_CLNT_ACCESS, > NFSPROC4_CLNT_GETATTR, > NFSPROC4_CLNT_LOOKUP, > + NFSPROC4_CLNT_LOOKUPP, > NFSPROC4_CLNT_LOOKUP_ROOT, > NFSPROC4_CLNT_REMOVE, > NFSPROC4_CLNT_RENAME, > diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h > index b28c83475ee8..7a664a5fcc25 100644 > --- a/include/linux/nfs_xdr.h > +++ b/include/linux/nfs_xdr.h > @@ -1012,7 +1012,6 @@ struct nfs4_link_res { > struct nfs_fattr * dir_attr; > }; > > - > struct nfs4_lookup_arg { > struct nfs4_sequence_args seq_args; > const struct nfs_fh * dir_fh; > @@ -1028,6 +1027,20 @@ struct nfs4_lookup_res { > struct nfs4_label *label; > }; > > +struct nfs4_lookupp_arg { > + struct nfs4_sequence_args seq_args; > + const struct nfs_fh *fh; > + const u32 *bitmask; > +}; > + > +struct nfs4_lookupp_res { > + struct nfs4_sequence_res seq_res; > + const struct nfs_server *server; > + struct nfs_fattr *fattr; > + struct nfs_fh *fh; > + struct nfs4_label *label; > +}; > + > struct nfs4_lookup_root_arg { > struct nfs4_sequence_args seq_args; > const u32 * bitmask; > @@ -1567,6 +1580,8 @@ struct nfs_rpc_ops { > int (*lookup) (struct inode *, const struct qstr *, > struct nfs_fh *, struct nfs_fattr *, > struct nfs4_label *); > + int (*lookupp) (struct inode *, struct nfs_fh *, > + struct nfs_fattr *, struct nfs4_label *); > int (*access) (struct inode *, struct nfs_access_entry *); > int (*readlink)(struct inode *, struct page *, unsigned int, > unsigned int); >