Re: [PATCH RFC 21/24] nfs: add a GDD_GETATTR rpc operation
From: Anna Schumaker <anna@kernel.org>
Date: 2024-03-15 20:51:07
Also in:
linux-cifs, linux-fsdevel, linux-nfs, linux-unionfs, lkml, netfs
Hi Jeff, On Fri, Mar 15, 2024 at 12:54 PM Jeff Layton [off-list ref] wrote:
quoted hunk ↗ jump to hunk
Add a new compound that does a GET_DIR_DELEGATION just before doing a GETATTR on an inode. Add a delegation stateid and a nf_status code to struct nfs4_getattr_res to store the result. Signed-off-by: Jeff Layton <jlayton@kernel.org> --- fs/nfs/nfs4xdr.c | 136 ++++++++++++++++++++++++++++++++++++++++++++++++ include/linux/nfs4.h | 1 + include/linux/nfs_xdr.h | 2 + 3 files changed, 139 insertions(+)diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c index 1416099dfcd1..c28025018bda 100644 --- a/fs/nfs/nfs4xdr.c +++ b/fs/nfs/nfs4xdr.c@@ -391,6 +391,22 @@ static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req, XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) #define encode_reclaim_complete_maxsz (op_encode_hdr_maxsz + 4) #define decode_reclaim_complete_maxsz (op_decode_hdr_maxsz + 4) +#define encode_get_dir_delegation_maxsz (op_encode_hdr_maxsz + \ + 4 /* gdda_signal_deleg_avail */ + \ + 8 /* gdda_notification_types */ + \ + nfstime4_maxsz /* gdda_child_attr_delay */ + \ + nfstime4_maxsz /* gdda_dir_attr_delay */ + \ + nfs4_fattr_bitmap_maxsz /* gdda_child_attributes */ + \ + nfs4_fattr_bitmap_maxsz /* gdda_dir_attributes */) + +#define decode_get_dir_delegation_maxsz (op_encode_hdr_maxsz + \ + 4 /* gddrnf_status */ + \ + encode_verifier_maxsz /* gddr_cookieverf */ + \ + encode_stateid_maxsz /* gddr_stateid */ + \ + 8 /* gddr_notification */ + \ + nfs4_fattr_bitmap_maxsz /* gddr_child_attributes */ + \ + nfs4_fattr_bitmap_maxsz /* gddr_dir_attributes */) + #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \ XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \ 1 /* layout type */ + \@@ -636,6 +652,18 @@ static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req, decode_putfh_maxsz + \ decode_getattr_maxsz + \ decode_renew_maxsz) +#define NFS4_enc_gdd_getattr_sz (compound_encode_hdr_maxsz + \ + encode_sequence_maxsz + \ + encode_putfh_maxsz + \ + encode_get_dir_delegation_maxsz + \ + encode_getattr_maxsz + \ + encode_renew_maxsz) +#define NFS4_dec_gdd_getattr_sz (compound_decode_hdr_maxsz + \ + decode_sequence_maxsz + \ + decode_putfh_maxsz + \ + decode_get_dir_delegation_maxsz + \ + decode_getattr_maxsz + \ + decode_renew_maxsz) #define NFS4_enc_lookup_sz (compound_encode_hdr_maxsz + \ encode_sequence_maxsz + \ encode_putfh_maxsz + \@@ -1981,6 +2009,30 @@ static void encode_sequence(struct xdr_stream *xdr, } #ifdef CONFIG_NFS_V4_1 +static void +encode_get_dir_delegation(struct xdr_stream *xdr, struct compound_hdr *hdr) +{ + __be32 *p; + struct timespec64 ts = {}; + u32 zerobm[1] = {}; + + encode_op_hdr(xdr, OP_GET_DIR_DELEGATION, decode_get_dir_delegation_maxsz, hdr); + + /* We can't handle CB_RECALLABLE_OBJ_AVAIL yet */ + xdr_stream_encode_bool(xdr, false); + + /* for now, we request no notification types */ + xdr_encode_bitmap4(xdr, zerobm, ARRAY_SIZE(zerobm)); + + /* Request no attribute updates */ + p = reserve_space(xdr, 12 + 12); + p = xdr_encode_nfstime4(p, &ts); + xdr_encode_nfstime4(p, &ts); + + xdr_encode_bitmap4(xdr, zerobm, ARRAY_SIZE(zerobm)); + xdr_encode_bitmap4(xdr, zerobm, ARRAY_SIZE(zerobm)); +} + static void encode_getdeviceinfo(struct xdr_stream *xdr, const struct nfs4_getdeviceinfo_args *args,@@ -2334,6 +2386,25 @@ static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr, encode_nops(&hdr); } +/* + * Encode GDD_GETATTR request + */ +static void nfs4_xdr_enc_gdd_getattr(struct rpc_rqst *req, struct xdr_stream *xdr, + const void *data) +{ + const struct nfs4_getattr_arg *args = data; + 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_get_dir_delegation(xdr, &hdr); + encode_getfattr(xdr, args->bitmask, &hdr); + encode_nops(&hdr); +} +
This function should be under a "#ifdef CONFIG_NFS_V4_1" to avoid the
following compiler error:
fs/nfs/nfs4xdr.c:2403:2: error: call to undeclared function
'encode_get_dir_delegation'; ISO C99 and later do not support implicit
function declarations [-Wimplicit-function-declaration]
2403 | encode_get_dir_delegation(xdr, &hdr);
| ^
quoted hunk ↗ jump to hunk
/* * Encode a CLOSE request */@@ -5919,6 +5990,43 @@ static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid) return decode_stateid(xdr, stateid); } +static int decode_get_dir_delegation(struct xdr_stream *xdr, + struct nfs4_getattr_res *res) +{ + nfs4_verifier cookieverf; + int status; + u32 bm[1]; + + status = decode_op_hdr(xdr, OP_GET_DIR_DELEGATION); + if (status) + return status; + + if (xdr_stream_decode_u32(xdr, &res->nf_status)) + return -EIO; + + if (res->nf_status == GDD4_UNAVAIL) + return xdr_inline_decode(xdr, 4) ? 0 : -EIO; + + status = decode_verifier(xdr, &cookieverf); + if (status) + return status; + + status = decode_delegation_stateid(xdr, &res->deleg); + if (status) + return status; + + status = decode_bitmap4(xdr, bm, ARRAY_SIZE(bm)); + if (status < 0) + return status; + status = decode_bitmap4(xdr, bm, ARRAY_SIZE(bm)); + if (status < 0) + return status; + status = decode_bitmap4(xdr, bm, ARRAY_SIZE(bm)); + if (status < 0) + return status; + return 0; +} + static int decode_getdeviceinfo(struct xdr_stream *xdr, struct nfs4_getdeviceinfo_res *res) {@@ -6455,6 +6563,33 @@ static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr, return status; } +/* + * Decode GDD_GETATTR response + */ +static int nfs4_xdr_dec_gdd_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr, + void *data) +{ + struct nfs4_getattr_res *res = data; + 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_get_dir_delegation(xdr, res); + if (status) + goto out; + status = decode_getfattr(xdr, res->fattr, res->server); +out: + return status; +} +
This needs to be under the same #ifdef, too. Thanks, Anna
quoted hunk ↗ jump to hunk
/* * Encode an SETACL request */@@ -7704,6 +7839,7 @@ const struct rpc_procinfo nfs4_procedures[] = { PROC41(BIND_CONN_TO_SESSION, enc_bind_conn_to_session, dec_bind_conn_to_session), PROC41(DESTROY_CLIENTID,enc_destroy_clientid, dec_destroy_clientid), + PROC41(GDD_GETATTR, enc_gdd_getattr, dec_gdd_getattr), PROC42(SEEK, enc_seek, dec_seek), PROC42(ALLOCATE, enc_allocate, dec_allocate), PROC42(DEALLOCATE, enc_deallocate, dec_deallocate),diff --git a/include/linux/nfs4.h b/include/linux/nfs4.h index 11ad088b411d..86cbfd50ecd1 100644 --- a/include/linux/nfs4.h +++ b/include/linux/nfs4.h@@ -681,6 +681,7 @@ enum { NFSPROC4_CLNT_LISTXATTRS, NFSPROC4_CLNT_REMOVEXATTR, NFSPROC4_CLNT_READ_PLUS, + NFSPROC4_CLNT_GDD_GETATTR, }; /* nfs41 types */diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h index d09b9773b20c..85ee37ccc25e 100644 --- a/include/linux/nfs_xdr.h +++ b/include/linux/nfs_xdr.h@@ -1072,6 +1072,8 @@ struct nfs4_getattr_res { struct nfs4_sequence_res seq_res; const struct nfs_server * server; struct nfs_fattr * fattr; + nfs4_stateid deleg; + u32 nf_status; }; struct nfs4_link_arg { --2.44.0