From: Jeff Layton <jeff.layton@xxxxxxxxxxxxxxx>
This will be needed in order to implement the get_parent export op
for nfsd.
Signed-off-by: Jeff Layton <jeff.layton@xxxxxxxxxxxxxxx>
---
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);
--
2.11.0
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