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303a780520
I found that the read code might send multiple requests using the same
nfs_pgio_header, but nfs4_proc_read_setup() is only called once. This is
how we ended up occasionally double-freeing the scratch buffer, but also
means we set a NULL pointer but non-zero length to the xdr scratch
buffer. This results in an oops the first time decoding needs to copy
something to scratch, which frequently happens when decoding READ_PLUS
hole segments.
I fix this by moving scratch handling into the pageio read code. I
provide a function to allocate scratch space for decoding read replies,
and free the scratch buffer when the nfs_pgio_header is freed.
Fixes: fbd2a05f29
(NFSv4.2: Rework scratch handling for READ_PLUS)
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
1673 lines
42 KiB
C
1673 lines
42 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2014 Anna Schumaker <Anna.Schumaker@Netapp.com>
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*/
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#ifndef __LINUX_FS_NFS_NFS4_2XDR_H
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#define __LINUX_FS_NFS_NFS4_2XDR_H
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#include "nfs42.h"
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/* Not limited by NFS itself, limited by the generic xattr code */
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#define nfs4_xattr_name_maxsz XDR_QUADLEN(XATTR_NAME_MAX)
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#define encode_fallocate_maxsz (encode_stateid_maxsz + \
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2 /* offset */ + \
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2 /* length */)
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#define NFS42_WRITE_RES_SIZE (1 /* wr_callback_id size */ +\
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XDR_QUADLEN(NFS4_STATEID_SIZE) + \
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2 /* wr_count */ + \
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1 /* wr_committed */ + \
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XDR_QUADLEN(NFS4_VERIFIER_SIZE))
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#define encode_allocate_maxsz (op_encode_hdr_maxsz + \
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encode_fallocate_maxsz)
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#define decode_allocate_maxsz (op_decode_hdr_maxsz)
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#define encode_copy_maxsz (op_encode_hdr_maxsz + \
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XDR_QUADLEN(NFS4_STATEID_SIZE) + \
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XDR_QUADLEN(NFS4_STATEID_SIZE) + \
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2 + 2 + 2 + 1 + 1 + 1 +\
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1 + /* One cnr_source_server */\
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1 + /* nl4_type */ \
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1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
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#define decode_copy_maxsz (op_decode_hdr_maxsz + \
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NFS42_WRITE_RES_SIZE + \
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1 /* cr_consecutive */ + \
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1 /* cr_synchronous */)
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#define encode_offload_cancel_maxsz (op_encode_hdr_maxsz + \
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XDR_QUADLEN(NFS4_STATEID_SIZE))
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#define decode_offload_cancel_maxsz (op_decode_hdr_maxsz)
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#define encode_copy_notify_maxsz (op_encode_hdr_maxsz + \
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XDR_QUADLEN(NFS4_STATEID_SIZE) + \
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1 + /* nl4_type */ \
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1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
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#define decode_copy_notify_maxsz (op_decode_hdr_maxsz + \
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3 + /* cnr_lease_time */\
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XDR_QUADLEN(NFS4_STATEID_SIZE) + \
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1 + /* Support 1 cnr_source_server */\
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1 + /* nl4_type */ \
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1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
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#define encode_deallocate_maxsz (op_encode_hdr_maxsz + \
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encode_fallocate_maxsz)
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#define decode_deallocate_maxsz (op_decode_hdr_maxsz)
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#define encode_read_plus_maxsz (op_encode_hdr_maxsz + \
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encode_stateid_maxsz + 3)
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#define NFS42_READ_PLUS_DATA_SEGMENT_SIZE \
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(1 /* data_content4 */ + \
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2 /* data_info4.di_offset */ + \
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1 /* data_info4.di_length */)
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#define NFS42_READ_PLUS_HOLE_SEGMENT_SIZE \
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(1 /* data_content4 */ + \
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2 /* data_info4.di_offset */ + \
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2 /* data_info4.di_length */)
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#define READ_PLUS_SEGMENT_SIZE_DIFF (NFS42_READ_PLUS_HOLE_SEGMENT_SIZE - \
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NFS42_READ_PLUS_DATA_SEGMENT_SIZE)
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#define decode_read_plus_maxsz (op_decode_hdr_maxsz + \
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1 /* rpr_eof */ + \
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1 /* rpr_contents count */ + \
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NFS42_READ_PLUS_HOLE_SEGMENT_SIZE)
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#define encode_seek_maxsz (op_encode_hdr_maxsz + \
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encode_stateid_maxsz + \
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2 /* offset */ + \
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1 /* whence */)
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#define decode_seek_maxsz (op_decode_hdr_maxsz + \
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1 /* eof */ + \
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1 /* whence */ + \
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2 /* offset */ + \
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2 /* length */)
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#define encode_io_info_maxsz 4
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#define encode_layoutstats_maxsz (op_decode_hdr_maxsz + \
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2 /* offset */ + \
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2 /* length */ + \
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encode_stateid_maxsz + \
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encode_io_info_maxsz + \
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encode_io_info_maxsz + \
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1 /* opaque devaddr4 length */ + \
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XDR_QUADLEN(PNFS_LAYOUTSTATS_MAXSIZE))
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#define decode_layoutstats_maxsz (op_decode_hdr_maxsz)
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#define encode_device_error_maxsz (XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
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1 /* status */ + 1 /* opnum */)
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#define encode_layouterror_maxsz (op_decode_hdr_maxsz + \
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2 /* offset */ + \
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2 /* length */ + \
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encode_stateid_maxsz + \
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1 /* Array size */ + \
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encode_device_error_maxsz)
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#define decode_layouterror_maxsz (op_decode_hdr_maxsz)
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#define encode_clone_maxsz (encode_stateid_maxsz + \
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encode_stateid_maxsz + \
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2 /* src offset */ + \
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2 /* dst offset */ + \
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2 /* count */)
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#define decode_clone_maxsz (op_decode_hdr_maxsz)
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#define encode_getxattr_maxsz (op_encode_hdr_maxsz + 1 + \
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nfs4_xattr_name_maxsz)
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#define decode_getxattr_maxsz (op_decode_hdr_maxsz + 1 + pagepad_maxsz)
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#define encode_setxattr_maxsz (op_encode_hdr_maxsz + \
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1 + nfs4_xattr_name_maxsz + 1)
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#define decode_setxattr_maxsz (op_decode_hdr_maxsz + decode_change_info_maxsz)
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#define encode_listxattrs_maxsz (op_encode_hdr_maxsz + 2 + 1)
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#define decode_listxattrs_maxsz (op_decode_hdr_maxsz + 2 + 1 + 1 + 1)
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#define encode_removexattr_maxsz (op_encode_hdr_maxsz + 1 + \
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nfs4_xattr_name_maxsz)
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#define decode_removexattr_maxsz (op_decode_hdr_maxsz + \
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decode_change_info_maxsz)
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#define NFS4_enc_allocate_sz (compound_encode_hdr_maxsz + \
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encode_sequence_maxsz + \
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encode_putfh_maxsz + \
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encode_allocate_maxsz + \
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encode_getattr_maxsz)
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#define NFS4_dec_allocate_sz (compound_decode_hdr_maxsz + \
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decode_sequence_maxsz + \
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decode_putfh_maxsz + \
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decode_allocate_maxsz + \
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decode_getattr_maxsz)
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#define NFS4_enc_copy_sz (compound_encode_hdr_maxsz + \
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encode_sequence_maxsz + \
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encode_putfh_maxsz + \
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encode_savefh_maxsz + \
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encode_putfh_maxsz + \
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encode_copy_maxsz + \
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encode_commit_maxsz)
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#define NFS4_dec_copy_sz (compound_decode_hdr_maxsz + \
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decode_sequence_maxsz + \
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decode_putfh_maxsz + \
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decode_savefh_maxsz + \
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decode_putfh_maxsz + \
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decode_copy_maxsz + \
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decode_commit_maxsz)
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#define NFS4_enc_offload_cancel_sz (compound_encode_hdr_maxsz + \
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encode_sequence_maxsz + \
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encode_putfh_maxsz + \
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encode_offload_cancel_maxsz)
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#define NFS4_dec_offload_cancel_sz (compound_decode_hdr_maxsz + \
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decode_sequence_maxsz + \
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decode_putfh_maxsz + \
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decode_offload_cancel_maxsz)
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#define NFS4_enc_copy_notify_sz (compound_encode_hdr_maxsz + \
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encode_putfh_maxsz + \
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encode_copy_notify_maxsz)
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#define NFS4_dec_copy_notify_sz (compound_decode_hdr_maxsz + \
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decode_putfh_maxsz + \
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decode_copy_notify_maxsz)
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#define NFS4_enc_deallocate_sz (compound_encode_hdr_maxsz + \
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encode_sequence_maxsz + \
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encode_putfh_maxsz + \
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encode_deallocate_maxsz + \
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encode_getattr_maxsz)
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#define NFS4_dec_deallocate_sz (compound_decode_hdr_maxsz + \
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decode_sequence_maxsz + \
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decode_putfh_maxsz + \
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decode_deallocate_maxsz + \
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decode_getattr_maxsz)
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#define NFS4_enc_read_plus_sz (compound_encode_hdr_maxsz + \
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encode_sequence_maxsz + \
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encode_putfh_maxsz + \
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encode_read_plus_maxsz)
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#define NFS4_dec_read_plus_sz (compound_decode_hdr_maxsz + \
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decode_sequence_maxsz + \
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decode_putfh_maxsz + \
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decode_read_plus_maxsz)
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#define NFS4_enc_seek_sz (compound_encode_hdr_maxsz + \
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encode_sequence_maxsz + \
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encode_putfh_maxsz + \
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encode_seek_maxsz)
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#define NFS4_dec_seek_sz (compound_decode_hdr_maxsz + \
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decode_sequence_maxsz + \
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decode_putfh_maxsz + \
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decode_seek_maxsz)
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#define NFS4_enc_layoutstats_sz (compound_encode_hdr_maxsz + \
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encode_sequence_maxsz + \
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encode_putfh_maxsz + \
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PNFS_LAYOUTSTATS_MAXDEV * encode_layoutstats_maxsz)
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#define NFS4_dec_layoutstats_sz (compound_decode_hdr_maxsz + \
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decode_sequence_maxsz + \
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decode_putfh_maxsz + \
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PNFS_LAYOUTSTATS_MAXDEV * decode_layoutstats_maxsz)
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#define NFS4_enc_layouterror_sz (compound_encode_hdr_maxsz + \
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encode_sequence_maxsz + \
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encode_putfh_maxsz + \
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NFS42_LAYOUTERROR_MAX * \
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encode_layouterror_maxsz)
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#define NFS4_dec_layouterror_sz (compound_decode_hdr_maxsz + \
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decode_sequence_maxsz + \
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decode_putfh_maxsz + \
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NFS42_LAYOUTERROR_MAX * \
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decode_layouterror_maxsz)
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#define NFS4_enc_clone_sz (compound_encode_hdr_maxsz + \
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encode_sequence_maxsz + \
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encode_putfh_maxsz + \
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encode_savefh_maxsz + \
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encode_putfh_maxsz + \
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encode_clone_maxsz + \
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encode_getattr_maxsz)
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#define NFS4_dec_clone_sz (compound_decode_hdr_maxsz + \
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decode_sequence_maxsz + \
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decode_putfh_maxsz + \
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decode_savefh_maxsz + \
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decode_putfh_maxsz + \
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decode_clone_maxsz + \
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decode_getattr_maxsz)
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#define NFS4_enc_getxattr_sz (compound_encode_hdr_maxsz + \
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encode_sequence_maxsz + \
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encode_putfh_maxsz + \
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encode_getxattr_maxsz)
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#define NFS4_dec_getxattr_sz (compound_decode_hdr_maxsz + \
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decode_sequence_maxsz + \
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decode_putfh_maxsz + \
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decode_getxattr_maxsz)
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#define NFS4_enc_setxattr_sz (compound_encode_hdr_maxsz + \
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encode_sequence_maxsz + \
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encode_putfh_maxsz + \
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encode_setxattr_maxsz + \
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encode_getattr_maxsz)
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#define NFS4_dec_setxattr_sz (compound_decode_hdr_maxsz + \
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decode_sequence_maxsz + \
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decode_putfh_maxsz + \
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decode_setxattr_maxsz + \
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decode_getattr_maxsz)
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#define NFS4_enc_listxattrs_sz (compound_encode_hdr_maxsz + \
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encode_sequence_maxsz + \
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encode_putfh_maxsz + \
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encode_listxattrs_maxsz)
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#define NFS4_dec_listxattrs_sz (compound_decode_hdr_maxsz + \
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decode_sequence_maxsz + \
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decode_putfh_maxsz + \
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decode_listxattrs_maxsz)
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#define NFS4_enc_removexattr_sz (compound_encode_hdr_maxsz + \
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encode_sequence_maxsz + \
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encode_putfh_maxsz + \
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encode_removexattr_maxsz)
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#define NFS4_dec_removexattr_sz (compound_decode_hdr_maxsz + \
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decode_sequence_maxsz + \
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decode_putfh_maxsz + \
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decode_removexattr_maxsz)
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/*
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* These values specify the maximum amount of data that is not
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* associated with the extended attribute name or extended
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* attribute list in the SETXATTR, GETXATTR and LISTXATTR
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* respectively.
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*/
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const u32 nfs42_maxsetxattr_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
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compound_encode_hdr_maxsz +
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encode_sequence_maxsz +
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encode_putfh_maxsz + 1 +
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nfs4_xattr_name_maxsz)
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* XDR_UNIT);
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const u32 nfs42_maxgetxattr_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
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compound_decode_hdr_maxsz +
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decode_sequence_maxsz +
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decode_putfh_maxsz + 1) * XDR_UNIT);
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const u32 nfs42_maxlistxattrs_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
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compound_decode_hdr_maxsz +
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decode_sequence_maxsz +
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decode_putfh_maxsz + 3) * XDR_UNIT);
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static void encode_fallocate(struct xdr_stream *xdr,
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const struct nfs42_falloc_args *args)
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{
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encode_nfs4_stateid(xdr, &args->falloc_stateid);
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encode_uint64(xdr, args->falloc_offset);
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encode_uint64(xdr, args->falloc_length);
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}
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static void encode_allocate(struct xdr_stream *xdr,
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const struct nfs42_falloc_args *args,
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struct compound_hdr *hdr)
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{
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encode_op_hdr(xdr, OP_ALLOCATE, decode_allocate_maxsz, hdr);
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encode_fallocate(xdr, args);
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}
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static void encode_nl4_server(struct xdr_stream *xdr,
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const struct nl4_server *ns)
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{
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encode_uint32(xdr, ns->nl4_type);
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switch (ns->nl4_type) {
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case NL4_NAME:
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case NL4_URL:
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encode_string(xdr, ns->u.nl4_str_sz, ns->u.nl4_str);
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break;
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case NL4_NETADDR:
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encode_string(xdr, ns->u.nl4_addr.netid_len,
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ns->u.nl4_addr.netid);
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encode_string(xdr, ns->u.nl4_addr.addr_len,
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ns->u.nl4_addr.addr);
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break;
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default:
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WARN_ON_ONCE(1);
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}
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}
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static void encode_copy(struct xdr_stream *xdr,
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const struct nfs42_copy_args *args,
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struct compound_hdr *hdr)
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{
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encode_op_hdr(xdr, OP_COPY, decode_copy_maxsz, hdr);
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encode_nfs4_stateid(xdr, &args->src_stateid);
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encode_nfs4_stateid(xdr, &args->dst_stateid);
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encode_uint64(xdr, args->src_pos);
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encode_uint64(xdr, args->dst_pos);
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encode_uint64(xdr, args->count);
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encode_uint32(xdr, 1); /* consecutive = true */
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encode_uint32(xdr, args->sync);
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if (args->cp_src == NULL) { /* intra-ssc */
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encode_uint32(xdr, 0); /* no src server list */
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return;
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}
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encode_uint32(xdr, 1); /* supporting 1 server */
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encode_nl4_server(xdr, args->cp_src);
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}
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static void encode_copy_commit(struct xdr_stream *xdr,
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const struct nfs42_copy_args *args,
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struct compound_hdr *hdr)
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{
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__be32 *p;
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encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
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p = reserve_space(xdr, 12);
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p = xdr_encode_hyper(p, args->dst_pos);
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*p = cpu_to_be32(args->count);
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}
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static void encode_offload_cancel(struct xdr_stream *xdr,
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const struct nfs42_offload_status_args *args,
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struct compound_hdr *hdr)
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{
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encode_op_hdr(xdr, OP_OFFLOAD_CANCEL, decode_offload_cancel_maxsz, hdr);
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encode_nfs4_stateid(xdr, &args->osa_stateid);
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}
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static void encode_copy_notify(struct xdr_stream *xdr,
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const struct nfs42_copy_notify_args *args,
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struct compound_hdr *hdr)
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{
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encode_op_hdr(xdr, OP_COPY_NOTIFY, decode_copy_notify_maxsz, hdr);
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encode_nfs4_stateid(xdr, &args->cna_src_stateid);
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encode_nl4_server(xdr, &args->cna_dst);
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}
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static void encode_deallocate(struct xdr_stream *xdr,
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const struct nfs42_falloc_args *args,
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struct compound_hdr *hdr)
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{
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encode_op_hdr(xdr, OP_DEALLOCATE, decode_deallocate_maxsz, hdr);
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encode_fallocate(xdr, args);
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}
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static void encode_read_plus(struct xdr_stream *xdr,
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const struct nfs_pgio_args *args,
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struct compound_hdr *hdr)
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{
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encode_op_hdr(xdr, OP_READ_PLUS, decode_read_plus_maxsz, hdr);
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encode_nfs4_stateid(xdr, &args->stateid);
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encode_uint64(xdr, args->offset);
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encode_uint32(xdr, args->count);
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}
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static void encode_seek(struct xdr_stream *xdr,
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const struct nfs42_seek_args *args,
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struct compound_hdr *hdr)
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{
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encode_op_hdr(xdr, OP_SEEK, decode_seek_maxsz, hdr);
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encode_nfs4_stateid(xdr, &args->sa_stateid);
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encode_uint64(xdr, args->sa_offset);
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encode_uint32(xdr, args->sa_what);
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}
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static void encode_layoutstats(struct xdr_stream *xdr,
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const struct nfs42_layoutstat_args *args,
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struct nfs42_layoutstat_devinfo *devinfo,
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struct compound_hdr *hdr)
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{
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__be32 *p;
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encode_op_hdr(xdr, OP_LAYOUTSTATS, decode_layoutstats_maxsz, hdr);
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p = reserve_space(xdr, 8 + 8);
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p = xdr_encode_hyper(p, devinfo->offset);
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p = xdr_encode_hyper(p, devinfo->length);
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encode_nfs4_stateid(xdr, &args->stateid);
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p = reserve_space(xdr, 4*8 + NFS4_DEVICEID4_SIZE + 4);
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p = xdr_encode_hyper(p, devinfo->read_count);
|
|
p = xdr_encode_hyper(p, devinfo->read_bytes);
|
|
p = xdr_encode_hyper(p, devinfo->write_count);
|
|
p = xdr_encode_hyper(p, devinfo->write_bytes);
|
|
p = xdr_encode_opaque_fixed(p, devinfo->dev_id.data,
|
|
NFS4_DEVICEID4_SIZE);
|
|
/* Encode layoutupdate4 */
|
|
*p++ = cpu_to_be32(devinfo->layout_type);
|
|
if (devinfo->ld_private.ops)
|
|
devinfo->ld_private.ops->encode(xdr, args,
|
|
&devinfo->ld_private);
|
|
else
|
|
encode_uint32(xdr, 0);
|
|
}
|
|
|
|
static void encode_clone(struct xdr_stream *xdr,
|
|
const struct nfs42_clone_args *args,
|
|
struct compound_hdr *hdr)
|
|
{
|
|
__be32 *p;
|
|
|
|
encode_op_hdr(xdr, OP_CLONE, decode_clone_maxsz, hdr);
|
|
encode_nfs4_stateid(xdr, &args->src_stateid);
|
|
encode_nfs4_stateid(xdr, &args->dst_stateid);
|
|
p = reserve_space(xdr, 3*8);
|
|
p = xdr_encode_hyper(p, args->src_offset);
|
|
p = xdr_encode_hyper(p, args->dst_offset);
|
|
xdr_encode_hyper(p, args->count);
|
|
}
|
|
|
|
static void encode_device_error(struct xdr_stream *xdr,
|
|
const struct nfs42_device_error *error)
|
|
{
|
|
__be32 *p;
|
|
|
|
p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 2*4);
|
|
p = xdr_encode_opaque_fixed(p, error->dev_id.data,
|
|
NFS4_DEVICEID4_SIZE);
|
|
*p++ = cpu_to_be32(error->status);
|
|
*p = cpu_to_be32(error->opnum);
|
|
}
|
|
|
|
static void encode_layouterror(struct xdr_stream *xdr,
|
|
const struct nfs42_layout_error *args,
|
|
struct compound_hdr *hdr)
|
|
{
|
|
__be32 *p;
|
|
|
|
encode_op_hdr(xdr, OP_LAYOUTERROR, decode_layouterror_maxsz, hdr);
|
|
p = reserve_space(xdr, 8 + 8);
|
|
p = xdr_encode_hyper(p, args->offset);
|
|
p = xdr_encode_hyper(p, args->length);
|
|
encode_nfs4_stateid(xdr, &args->stateid);
|
|
p = reserve_space(xdr, 4);
|
|
*p = cpu_to_be32(1);
|
|
encode_device_error(xdr, &args->errors[0]);
|
|
}
|
|
|
|
static void encode_setxattr(struct xdr_stream *xdr,
|
|
const struct nfs42_setxattrargs *arg,
|
|
struct compound_hdr *hdr)
|
|
{
|
|
__be32 *p;
|
|
|
|
BUILD_BUG_ON(XATTR_CREATE != SETXATTR4_CREATE);
|
|
BUILD_BUG_ON(XATTR_REPLACE != SETXATTR4_REPLACE);
|
|
|
|
encode_op_hdr(xdr, OP_SETXATTR, decode_setxattr_maxsz, hdr);
|
|
p = reserve_space(xdr, 4);
|
|
*p = cpu_to_be32(arg->xattr_flags);
|
|
encode_string(xdr, strlen(arg->xattr_name), arg->xattr_name);
|
|
p = reserve_space(xdr, 4);
|
|
*p = cpu_to_be32(arg->xattr_len);
|
|
if (arg->xattr_len)
|
|
xdr_write_pages(xdr, arg->xattr_pages, 0, arg->xattr_len);
|
|
}
|
|
|
|
static void encode_getxattr(struct xdr_stream *xdr, const char *name,
|
|
struct compound_hdr *hdr)
|
|
{
|
|
encode_op_hdr(xdr, OP_GETXATTR, decode_getxattr_maxsz, hdr);
|
|
encode_string(xdr, strlen(name), name);
|
|
}
|
|
|
|
static void encode_removexattr(struct xdr_stream *xdr, const char *name,
|
|
struct compound_hdr *hdr)
|
|
{
|
|
encode_op_hdr(xdr, OP_REMOVEXATTR, decode_removexattr_maxsz, hdr);
|
|
encode_string(xdr, strlen(name), name);
|
|
}
|
|
|
|
static void encode_listxattrs(struct xdr_stream *xdr,
|
|
const struct nfs42_listxattrsargs *arg,
|
|
struct compound_hdr *hdr)
|
|
{
|
|
__be32 *p;
|
|
|
|
encode_op_hdr(xdr, OP_LISTXATTRS, decode_listxattrs_maxsz, hdr);
|
|
|
|
p = reserve_space(xdr, 12);
|
|
if (unlikely(!p))
|
|
return;
|
|
|
|
p = xdr_encode_hyper(p, arg->cookie);
|
|
/*
|
|
* RFC 8276 says to specify the full max length of the LISTXATTRS
|
|
* XDR reply. Count is set to the XDR length of the names array
|
|
* plus the EOF marker. So, add the cookie and the names count.
|
|
*/
|
|
*p = cpu_to_be32(arg->count + 8 + 4);
|
|
}
|
|
|
|
/*
|
|
* Encode ALLOCATE request
|
|
*/
|
|
static void nfs4_xdr_enc_allocate(struct rpc_rqst *req,
|
|
struct xdr_stream *xdr,
|
|
const void *data)
|
|
{
|
|
const struct nfs42_falloc_args *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->falloc_fh, &hdr);
|
|
encode_allocate(xdr, args, &hdr);
|
|
encode_getfattr(xdr, args->falloc_bitmask, &hdr);
|
|
encode_nops(&hdr);
|
|
}
|
|
|
|
/*
|
|
* Encode COPY request
|
|
*/
|
|
static void nfs4_xdr_enc_copy(struct rpc_rqst *req,
|
|
struct xdr_stream *xdr,
|
|
const void *data)
|
|
{
|
|
const struct nfs42_copy_args *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->src_fh, &hdr);
|
|
encode_savefh(xdr, &hdr);
|
|
encode_putfh(xdr, args->dst_fh, &hdr);
|
|
encode_copy(xdr, args, &hdr);
|
|
if (args->sync)
|
|
encode_copy_commit(xdr, args, &hdr);
|
|
encode_nops(&hdr);
|
|
}
|
|
|
|
/*
|
|
* Encode OFFLOAD_CANEL request
|
|
*/
|
|
static void nfs4_xdr_enc_offload_cancel(struct rpc_rqst *req,
|
|
struct xdr_stream *xdr,
|
|
const void *data)
|
|
{
|
|
const struct nfs42_offload_status_args *args = data;
|
|
struct compound_hdr hdr = {
|
|
.minorversion = nfs4_xdr_minorversion(&args->osa_seq_args),
|
|
};
|
|
|
|
encode_compound_hdr(xdr, req, &hdr);
|
|
encode_sequence(xdr, &args->osa_seq_args, &hdr);
|
|
encode_putfh(xdr, args->osa_src_fh, &hdr);
|
|
encode_offload_cancel(xdr, args, &hdr);
|
|
encode_nops(&hdr);
|
|
}
|
|
|
|
/*
|
|
* Encode COPY_NOTIFY request
|
|
*/
|
|
static void nfs4_xdr_enc_copy_notify(struct rpc_rqst *req,
|
|
struct xdr_stream *xdr,
|
|
const void *data)
|
|
{
|
|
const struct nfs42_copy_notify_args *args = data;
|
|
struct compound_hdr hdr = {
|
|
.minorversion = nfs4_xdr_minorversion(&args->cna_seq_args),
|
|
};
|
|
|
|
encode_compound_hdr(xdr, req, &hdr);
|
|
encode_sequence(xdr, &args->cna_seq_args, &hdr);
|
|
encode_putfh(xdr, args->cna_src_fh, &hdr);
|
|
encode_copy_notify(xdr, args, &hdr);
|
|
encode_nops(&hdr);
|
|
}
|
|
|
|
/*
|
|
* Encode DEALLOCATE request
|
|
*/
|
|
static void nfs4_xdr_enc_deallocate(struct rpc_rqst *req,
|
|
struct xdr_stream *xdr,
|
|
const void *data)
|
|
{
|
|
const struct nfs42_falloc_args *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->falloc_fh, &hdr);
|
|
encode_deallocate(xdr, args, &hdr);
|
|
encode_getfattr(xdr, args->falloc_bitmask, &hdr);
|
|
encode_nops(&hdr);
|
|
}
|
|
|
|
/*
|
|
* Encode READ_PLUS request
|
|
*/
|
|
static void nfs4_xdr_enc_read_plus(struct rpc_rqst *req,
|
|
struct xdr_stream *xdr,
|
|
const void *data)
|
|
{
|
|
const struct nfs_pgio_args *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_read_plus(xdr, args, &hdr);
|
|
|
|
rpc_prepare_reply_pages(req, args->pages, args->pgbase, args->count,
|
|
hdr.replen - READ_PLUS_SEGMENT_SIZE_DIFF);
|
|
encode_nops(&hdr);
|
|
}
|
|
|
|
/*
|
|
* Encode SEEK request
|
|
*/
|
|
static void nfs4_xdr_enc_seek(struct rpc_rqst *req,
|
|
struct xdr_stream *xdr,
|
|
const void *data)
|
|
{
|
|
const struct nfs42_seek_args *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->sa_fh, &hdr);
|
|
encode_seek(xdr, args, &hdr);
|
|
encode_nops(&hdr);
|
|
}
|
|
|
|
/*
|
|
* Encode LAYOUTSTATS request
|
|
*/
|
|
static void nfs4_xdr_enc_layoutstats(struct rpc_rqst *req,
|
|
struct xdr_stream *xdr,
|
|
const void *data)
|
|
{
|
|
const struct nfs42_layoutstat_args *args = data;
|
|
int i;
|
|
|
|
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);
|
|
WARN_ON(args->num_dev > PNFS_LAYOUTSTATS_MAXDEV);
|
|
for (i = 0; i < args->num_dev; i++)
|
|
encode_layoutstats(xdr, args, &args->devinfo[i], &hdr);
|
|
encode_nops(&hdr);
|
|
}
|
|
|
|
/*
|
|
* Encode CLONE request
|
|
*/
|
|
static void nfs4_xdr_enc_clone(struct rpc_rqst *req,
|
|
struct xdr_stream *xdr,
|
|
const void *data)
|
|
{
|
|
const struct nfs42_clone_args *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->src_fh, &hdr);
|
|
encode_savefh(xdr, &hdr);
|
|
encode_putfh(xdr, args->dst_fh, &hdr);
|
|
encode_clone(xdr, args, &hdr);
|
|
encode_getfattr(xdr, args->dst_bitmask, &hdr);
|
|
encode_nops(&hdr);
|
|
}
|
|
|
|
/*
|
|
* Encode LAYOUTERROR request
|
|
*/
|
|
static void nfs4_xdr_enc_layouterror(struct rpc_rqst *req,
|
|
struct xdr_stream *xdr,
|
|
const void *data)
|
|
{
|
|
const struct nfs42_layouterror_args *args = data;
|
|
struct compound_hdr hdr = {
|
|
.minorversion = nfs4_xdr_minorversion(&args->seq_args),
|
|
};
|
|
int i;
|
|
|
|
encode_compound_hdr(xdr, req, &hdr);
|
|
encode_sequence(xdr, &args->seq_args, &hdr);
|
|
encode_putfh(xdr, NFS_FH(args->inode), &hdr);
|
|
for (i = 0; i < args->num_errors; i++)
|
|
encode_layouterror(xdr, &args->errors[i], &hdr);
|
|
encode_nops(&hdr);
|
|
}
|
|
|
|
/*
|
|
* Encode SETXATTR request
|
|
*/
|
|
static void nfs4_xdr_enc_setxattr(struct rpc_rqst *req, struct xdr_stream *xdr,
|
|
const void *data)
|
|
{
|
|
const struct nfs42_setxattrargs *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_setxattr(xdr, args, &hdr);
|
|
encode_getfattr(xdr, args->bitmask, &hdr);
|
|
encode_nops(&hdr);
|
|
}
|
|
|
|
/*
|
|
* Encode GETXATTR request
|
|
*/
|
|
static void nfs4_xdr_enc_getxattr(struct rpc_rqst *req, struct xdr_stream *xdr,
|
|
const void *data)
|
|
{
|
|
const struct nfs42_getxattrargs *args = data;
|
|
struct compound_hdr hdr = {
|
|
.minorversion = nfs4_xdr_minorversion(&args->seq_args),
|
|
};
|
|
uint32_t replen;
|
|
|
|
encode_compound_hdr(xdr, req, &hdr);
|
|
encode_sequence(xdr, &args->seq_args, &hdr);
|
|
encode_putfh(xdr, args->fh, &hdr);
|
|
replen = hdr.replen + op_decode_hdr_maxsz + 1;
|
|
encode_getxattr(xdr, args->xattr_name, &hdr);
|
|
|
|
rpc_prepare_reply_pages(req, args->xattr_pages, 0, args->xattr_len,
|
|
replen);
|
|
|
|
encode_nops(&hdr);
|
|
}
|
|
|
|
/*
|
|
* Encode LISTXATTR request
|
|
*/
|
|
static void nfs4_xdr_enc_listxattrs(struct rpc_rqst *req,
|
|
struct xdr_stream *xdr, const void *data)
|
|
{
|
|
const struct nfs42_listxattrsargs *args = data;
|
|
struct compound_hdr hdr = {
|
|
.minorversion = nfs4_xdr_minorversion(&args->seq_args),
|
|
};
|
|
uint32_t replen;
|
|
|
|
encode_compound_hdr(xdr, req, &hdr);
|
|
encode_sequence(xdr, &args->seq_args, &hdr);
|
|
encode_putfh(xdr, args->fh, &hdr);
|
|
replen = hdr.replen + op_decode_hdr_maxsz + 2 + 1;
|
|
encode_listxattrs(xdr, args, &hdr);
|
|
|
|
rpc_prepare_reply_pages(req, args->xattr_pages, 0, args->count, replen);
|
|
|
|
encode_nops(&hdr);
|
|
}
|
|
|
|
/*
|
|
* Encode REMOVEXATTR request
|
|
*/
|
|
static void nfs4_xdr_enc_removexattr(struct rpc_rqst *req,
|
|
struct xdr_stream *xdr, const void *data)
|
|
{
|
|
const struct nfs42_removexattrargs *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_removexattr(xdr, args->xattr_name, &hdr);
|
|
encode_nops(&hdr);
|
|
}
|
|
|
|
static int decode_allocate(struct xdr_stream *xdr, struct nfs42_falloc_res *res)
|
|
{
|
|
return decode_op_hdr(xdr, OP_ALLOCATE);
|
|
}
|
|
|
|
static int decode_write_response(struct xdr_stream *xdr,
|
|
struct nfs42_write_res *res)
|
|
{
|
|
__be32 *p;
|
|
int status, count;
|
|
|
|
p = xdr_inline_decode(xdr, 4);
|
|
if (unlikely(!p))
|
|
return -EIO;
|
|
count = be32_to_cpup(p);
|
|
if (count > 1)
|
|
return -EREMOTEIO;
|
|
else if (count == 1) {
|
|
status = decode_opaque_fixed(xdr, &res->stateid,
|
|
NFS4_STATEID_SIZE);
|
|
if (unlikely(status))
|
|
return -EIO;
|
|
}
|
|
p = xdr_inline_decode(xdr, 8 + 4);
|
|
if (unlikely(!p))
|
|
return -EIO;
|
|
p = xdr_decode_hyper(p, &res->count);
|
|
res->verifier.committed = be32_to_cpup(p);
|
|
return decode_verifier(xdr, &res->verifier.verifier);
|
|
}
|
|
|
|
static int decode_nl4_server(struct xdr_stream *xdr, struct nl4_server *ns)
|
|
{
|
|
struct nfs42_netaddr *naddr;
|
|
uint32_t dummy;
|
|
char *dummy_str;
|
|
__be32 *p;
|
|
int status;
|
|
|
|
/* nl_type */
|
|
p = xdr_inline_decode(xdr, 4);
|
|
if (unlikely(!p))
|
|
return -EIO;
|
|
ns->nl4_type = be32_to_cpup(p);
|
|
switch (ns->nl4_type) {
|
|
case NL4_NAME:
|
|
case NL4_URL:
|
|
status = decode_opaque_inline(xdr, &dummy, &dummy_str);
|
|
if (unlikely(status))
|
|
return status;
|
|
if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
|
|
return -EIO;
|
|
memcpy(&ns->u.nl4_str, dummy_str, dummy);
|
|
ns->u.nl4_str_sz = dummy;
|
|
break;
|
|
case NL4_NETADDR:
|
|
naddr = &ns->u.nl4_addr;
|
|
|
|
/* netid string */
|
|
status = decode_opaque_inline(xdr, &dummy, &dummy_str);
|
|
if (unlikely(status))
|
|
return status;
|
|
if (unlikely(dummy > RPCBIND_MAXNETIDLEN))
|
|
return -EIO;
|
|
naddr->netid_len = dummy;
|
|
memcpy(naddr->netid, dummy_str, naddr->netid_len);
|
|
|
|
/* uaddr string */
|
|
status = decode_opaque_inline(xdr, &dummy, &dummy_str);
|
|
if (unlikely(status))
|
|
return status;
|
|
if (unlikely(dummy > RPCBIND_MAXUADDRLEN))
|
|
return -EIO;
|
|
naddr->addr_len = dummy;
|
|
memcpy(naddr->addr, dummy_str, naddr->addr_len);
|
|
break;
|
|
default:
|
|
WARN_ON_ONCE(1);
|
|
return -EIO;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int decode_copy_requirements(struct xdr_stream *xdr,
|
|
struct nfs42_copy_res *res) {
|
|
__be32 *p;
|
|
|
|
p = xdr_inline_decode(xdr, 4 + 4);
|
|
if (unlikely(!p))
|
|
return -EIO;
|
|
|
|
res->consecutive = be32_to_cpup(p++);
|
|
res->synchronous = be32_to_cpup(p++);
|
|
return 0;
|
|
}
|
|
|
|
static int decode_copy(struct xdr_stream *xdr, struct nfs42_copy_res *res)
|
|
{
|
|
int status;
|
|
|
|
status = decode_op_hdr(xdr, OP_COPY);
|
|
if (status == NFS4ERR_OFFLOAD_NO_REQS) {
|
|
status = decode_copy_requirements(xdr, res);
|
|
if (status)
|
|
return status;
|
|
return NFS4ERR_OFFLOAD_NO_REQS;
|
|
} else if (status)
|
|
return status;
|
|
|
|
status = decode_write_response(xdr, &res->write_res);
|
|
if (status)
|
|
return status;
|
|
|
|
return decode_copy_requirements(xdr, res);
|
|
}
|
|
|
|
static int decode_offload_cancel(struct xdr_stream *xdr,
|
|
struct nfs42_offload_status_res *res)
|
|
{
|
|
return decode_op_hdr(xdr, OP_OFFLOAD_CANCEL);
|
|
}
|
|
|
|
static int decode_copy_notify(struct xdr_stream *xdr,
|
|
struct nfs42_copy_notify_res *res)
|
|
{
|
|
__be32 *p;
|
|
int status, count;
|
|
|
|
status = decode_op_hdr(xdr, OP_COPY_NOTIFY);
|
|
if (status)
|
|
return status;
|
|
/* cnr_lease_time */
|
|
p = xdr_inline_decode(xdr, 12);
|
|
if (unlikely(!p))
|
|
return -EIO;
|
|
p = xdr_decode_hyper(p, &res->cnr_lease_time.seconds);
|
|
res->cnr_lease_time.nseconds = be32_to_cpup(p);
|
|
|
|
status = decode_opaque_fixed(xdr, &res->cnr_stateid, NFS4_STATEID_SIZE);
|
|
if (unlikely(status))
|
|
return -EIO;
|
|
|
|
/* number of source addresses */
|
|
p = xdr_inline_decode(xdr, 4);
|
|
if (unlikely(!p))
|
|
return -EIO;
|
|
|
|
count = be32_to_cpup(p);
|
|
if (count > 1)
|
|
pr_warn("NFS: %s: nsvr %d > Supported. Use first servers\n",
|
|
__func__, count);
|
|
|
|
status = decode_nl4_server(xdr, &res->cnr_src);
|
|
if (unlikely(status))
|
|
return -EIO;
|
|
return 0;
|
|
}
|
|
|
|
static int decode_deallocate(struct xdr_stream *xdr, struct nfs42_falloc_res *res)
|
|
{
|
|
return decode_op_hdr(xdr, OP_DEALLOCATE);
|
|
}
|
|
|
|
struct read_plus_segment {
|
|
enum data_content4 type;
|
|
uint64_t offset;
|
|
union {
|
|
struct {
|
|
uint64_t length;
|
|
} hole;
|
|
|
|
struct {
|
|
uint32_t length;
|
|
unsigned int from;
|
|
} data;
|
|
};
|
|
};
|
|
|
|
static inline uint64_t read_plus_segment_length(struct read_plus_segment *seg)
|
|
{
|
|
return seg->type == NFS4_CONTENT_DATA ? seg->data.length : seg->hole.length;
|
|
}
|
|
|
|
static int decode_read_plus_segment(struct xdr_stream *xdr,
|
|
struct read_plus_segment *seg)
|
|
{
|
|
__be32 *p;
|
|
|
|
p = xdr_inline_decode(xdr, 4);
|
|
if (!p)
|
|
return -EIO;
|
|
seg->type = be32_to_cpup(p++);
|
|
|
|
p = xdr_inline_decode(xdr, seg->type == NFS4_CONTENT_DATA ? 12 : 16);
|
|
if (!p)
|
|
return -EIO;
|
|
p = xdr_decode_hyper(p, &seg->offset);
|
|
|
|
if (seg->type == NFS4_CONTENT_DATA) {
|
|
struct xdr_buf buf;
|
|
uint32_t len = be32_to_cpup(p);
|
|
|
|
seg->data.length = len;
|
|
seg->data.from = xdr_stream_pos(xdr);
|
|
|
|
if (!xdr_stream_subsegment(xdr, &buf, xdr_align_size(len)))
|
|
return -EIO;
|
|
} else if (seg->type == NFS4_CONTENT_HOLE) {
|
|
xdr_decode_hyper(p, &seg->hole.length);
|
|
} else
|
|
return -EINVAL;
|
|
return 0;
|
|
}
|
|
|
|
static int process_read_plus_segment(struct xdr_stream *xdr,
|
|
struct nfs_pgio_args *args,
|
|
struct nfs_pgio_res *res,
|
|
struct read_plus_segment *seg)
|
|
{
|
|
unsigned long offset = seg->offset;
|
|
unsigned long length = read_plus_segment_length(seg);
|
|
unsigned int bufpos;
|
|
|
|
if (offset + length < args->offset)
|
|
return 0;
|
|
else if (offset > args->offset + args->count) {
|
|
res->eof = 0;
|
|
return 0;
|
|
} else if (offset < args->offset) {
|
|
length -= (args->offset - offset);
|
|
offset = args->offset;
|
|
} else if (offset + length > args->offset + args->count) {
|
|
length = (args->offset + args->count) - offset;
|
|
res->eof = 0;
|
|
}
|
|
|
|
bufpos = xdr->buf->head[0].iov_len + (offset - args->offset);
|
|
if (seg->type == NFS4_CONTENT_HOLE)
|
|
return xdr_stream_zero(xdr, bufpos, length);
|
|
else
|
|
return xdr_stream_move_subsegment(xdr, seg->data.from, bufpos, length);
|
|
}
|
|
|
|
static int decode_read_plus(struct xdr_stream *xdr, struct nfs_pgio_res *res)
|
|
{
|
|
struct nfs_pgio_header *hdr =
|
|
container_of(res, struct nfs_pgio_header, res);
|
|
struct nfs_pgio_args *args = &hdr->args;
|
|
uint32_t segments;
|
|
struct read_plus_segment *segs;
|
|
int status, i;
|
|
__be32 *p;
|
|
|
|
status = decode_op_hdr(xdr, OP_READ_PLUS);
|
|
if (status)
|
|
return status;
|
|
|
|
p = xdr_inline_decode(xdr, 4 + 4);
|
|
if (unlikely(!p))
|
|
return -EIO;
|
|
|
|
res->count = 0;
|
|
res->eof = be32_to_cpup(p++);
|
|
segments = be32_to_cpup(p++);
|
|
if (segments == 0)
|
|
return 0;
|
|
|
|
segs = kmalloc_array(segments, sizeof(*segs), GFP_KERNEL);
|
|
if (!segs)
|
|
return -ENOMEM;
|
|
|
|
for (i = 0; i < segments; i++) {
|
|
status = decode_read_plus_segment(xdr, &segs[i]);
|
|
if (status < 0)
|
|
goto out;
|
|
}
|
|
|
|
xdr_set_pagelen(xdr, xdr_align_size(args->count));
|
|
for (i = segments; i > 0; i--)
|
|
res->count += process_read_plus_segment(xdr, args, res, &segs[i-1]);
|
|
status = 0;
|
|
|
|
out:
|
|
kfree(segs);
|
|
return status;
|
|
}
|
|
|
|
static int decode_seek(struct xdr_stream *xdr, struct nfs42_seek_res *res)
|
|
{
|
|
int status;
|
|
__be32 *p;
|
|
|
|
status = decode_op_hdr(xdr, OP_SEEK);
|
|
if (status)
|
|
return status;
|
|
|
|
p = xdr_inline_decode(xdr, 4 + 8);
|
|
if (unlikely(!p))
|
|
return -EIO;
|
|
|
|
res->sr_eof = be32_to_cpup(p++);
|
|
p = xdr_decode_hyper(p, &res->sr_offset);
|
|
return 0;
|
|
}
|
|
|
|
static int decode_layoutstats(struct xdr_stream *xdr)
|
|
{
|
|
return decode_op_hdr(xdr, OP_LAYOUTSTATS);
|
|
}
|
|
|
|
static int decode_clone(struct xdr_stream *xdr)
|
|
{
|
|
return decode_op_hdr(xdr, OP_CLONE);
|
|
}
|
|
|
|
static int decode_layouterror(struct xdr_stream *xdr)
|
|
{
|
|
return decode_op_hdr(xdr, OP_LAYOUTERROR);
|
|
}
|
|
|
|
static int decode_setxattr(struct xdr_stream *xdr,
|
|
struct nfs4_change_info *cinfo)
|
|
{
|
|
int status;
|
|
|
|
status = decode_op_hdr(xdr, OP_SETXATTR);
|
|
if (status)
|
|
goto out;
|
|
status = decode_change_info(xdr, cinfo);
|
|
out:
|
|
return status;
|
|
}
|
|
|
|
static int decode_getxattr(struct xdr_stream *xdr,
|
|
struct nfs42_getxattrres *res,
|
|
struct rpc_rqst *req)
|
|
{
|
|
int status;
|
|
__be32 *p;
|
|
u32 len, rdlen;
|
|
|
|
status = decode_op_hdr(xdr, OP_GETXATTR);
|
|
if (status)
|
|
return status;
|
|
|
|
p = xdr_inline_decode(xdr, 4);
|
|
if (unlikely(!p))
|
|
return -EIO;
|
|
|
|
len = be32_to_cpup(p);
|
|
|
|
/*
|
|
* Only check against the page length here. The actual
|
|
* requested length may be smaller, but that is only
|
|
* checked against after possibly caching a valid reply.
|
|
*/
|
|
if (len > req->rq_rcv_buf.page_len)
|
|
return -ERANGE;
|
|
|
|
res->xattr_len = len;
|
|
|
|
if (len > 0) {
|
|
rdlen = xdr_read_pages(xdr, len);
|
|
if (rdlen < len)
|
|
return -EIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int decode_removexattr(struct xdr_stream *xdr,
|
|
struct nfs4_change_info *cinfo)
|
|
{
|
|
int status;
|
|
|
|
status = decode_op_hdr(xdr, OP_REMOVEXATTR);
|
|
if (status)
|
|
goto out;
|
|
|
|
status = decode_change_info(xdr, cinfo);
|
|
out:
|
|
return status;
|
|
}
|
|
|
|
static int decode_listxattrs(struct xdr_stream *xdr,
|
|
struct nfs42_listxattrsres *res)
|
|
{
|
|
int status;
|
|
__be32 *p;
|
|
u32 count, len, ulen;
|
|
size_t left, copied;
|
|
char *buf;
|
|
|
|
status = decode_op_hdr(xdr, OP_LISTXATTRS);
|
|
if (status) {
|
|
/*
|
|
* Special case: for LISTXATTRS, NFS4ERR_TOOSMALL
|
|
* should be translated to ERANGE.
|
|
*/
|
|
if (status == -ETOOSMALL)
|
|
status = -ERANGE;
|
|
/*
|
|
* Special case: for LISTXATTRS, NFS4ERR_NOXATTR
|
|
* should be translated to success with zero-length reply.
|
|
*/
|
|
if (status == -ENODATA) {
|
|
res->eof = true;
|
|
status = 0;
|
|
}
|
|
goto out;
|
|
}
|
|
|
|
p = xdr_inline_decode(xdr, 8);
|
|
if (unlikely(!p))
|
|
return -EIO;
|
|
|
|
xdr_decode_hyper(p, &res->cookie);
|
|
|
|
p = xdr_inline_decode(xdr, 4);
|
|
if (unlikely(!p))
|
|
return -EIO;
|
|
|
|
left = res->xattr_len;
|
|
buf = res->xattr_buf;
|
|
|
|
count = be32_to_cpup(p);
|
|
copied = 0;
|
|
|
|
/*
|
|
* We have asked for enough room to encode the maximum number
|
|
* of possible attribute names, so everything should fit.
|
|
*
|
|
* But, don't rely on that assumption. Just decode entries
|
|
* until they don't fit anymore, just in case the server did
|
|
* something odd.
|
|
*/
|
|
while (count--) {
|
|
p = xdr_inline_decode(xdr, 4);
|
|
if (unlikely(!p))
|
|
return -EIO;
|
|
|
|
len = be32_to_cpup(p);
|
|
if (len > (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) {
|
|
status = -ERANGE;
|
|
goto out;
|
|
}
|
|
|
|
p = xdr_inline_decode(xdr, len);
|
|
if (unlikely(!p))
|
|
return -EIO;
|
|
|
|
ulen = len + XATTR_USER_PREFIX_LEN + 1;
|
|
if (buf) {
|
|
if (ulen > left) {
|
|
status = -ERANGE;
|
|
goto out;
|
|
}
|
|
|
|
memcpy(buf, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
|
|
memcpy(buf + XATTR_USER_PREFIX_LEN, p, len);
|
|
|
|
buf[ulen - 1] = 0;
|
|
buf += ulen;
|
|
left -= ulen;
|
|
}
|
|
copied += ulen;
|
|
}
|
|
|
|
p = xdr_inline_decode(xdr, 4);
|
|
if (unlikely(!p))
|
|
return -EIO;
|
|
|
|
res->eof = be32_to_cpup(p);
|
|
res->copied = copied;
|
|
|
|
out:
|
|
if (status == -ERANGE && res->xattr_len == XATTR_LIST_MAX)
|
|
status = -E2BIG;
|
|
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* Decode ALLOCATE request
|
|
*/
|
|
static int nfs4_xdr_dec_allocate(struct rpc_rqst *rqstp,
|
|
struct xdr_stream *xdr,
|
|
void *data)
|
|
{
|
|
struct nfs42_falloc_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_allocate(xdr, res);
|
|
if (status)
|
|
goto out;
|
|
decode_getfattr(xdr, res->falloc_fattr, res->falloc_server);
|
|
out:
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* Decode COPY response
|
|
*/
|
|
static int nfs4_xdr_dec_copy(struct rpc_rqst *rqstp,
|
|
struct xdr_stream *xdr,
|
|
void *data)
|
|
{
|
|
struct nfs42_copy_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_savefh(xdr);
|
|
if (status)
|
|
goto out;
|
|
status = decode_putfh(xdr);
|
|
if (status)
|
|
goto out;
|
|
status = decode_copy(xdr, res);
|
|
if (status)
|
|
goto out;
|
|
if (res->commit_res.verf)
|
|
status = decode_commit(xdr, &res->commit_res);
|
|
out:
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* Decode OFFLOAD_CANCEL response
|
|
*/
|
|
static int nfs4_xdr_dec_offload_cancel(struct rpc_rqst *rqstp,
|
|
struct xdr_stream *xdr,
|
|
void *data)
|
|
{
|
|
struct nfs42_offload_status_res *res = data;
|
|
struct compound_hdr hdr;
|
|
int status;
|
|
|
|
status = decode_compound_hdr(xdr, &hdr);
|
|
if (status)
|
|
goto out;
|
|
status = decode_sequence(xdr, &res->osr_seq_res, rqstp);
|
|
if (status)
|
|
goto out;
|
|
status = decode_putfh(xdr);
|
|
if (status)
|
|
goto out;
|
|
status = decode_offload_cancel(xdr, res);
|
|
|
|
out:
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* Decode COPY_NOTIFY response
|
|
*/
|
|
static int nfs4_xdr_dec_copy_notify(struct rpc_rqst *rqstp,
|
|
struct xdr_stream *xdr,
|
|
void *data)
|
|
{
|
|
struct nfs42_copy_notify_res *res = data;
|
|
struct compound_hdr hdr;
|
|
int status;
|
|
|
|
status = decode_compound_hdr(xdr, &hdr);
|
|
if (status)
|
|
goto out;
|
|
status = decode_sequence(xdr, &res->cnr_seq_res, rqstp);
|
|
if (status)
|
|
goto out;
|
|
status = decode_putfh(xdr);
|
|
if (status)
|
|
goto out;
|
|
status = decode_copy_notify(xdr, res);
|
|
|
|
out:
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* Decode DEALLOCATE request
|
|
*/
|
|
static int nfs4_xdr_dec_deallocate(struct rpc_rqst *rqstp,
|
|
struct xdr_stream *xdr,
|
|
void *data)
|
|
{
|
|
struct nfs42_falloc_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_deallocate(xdr, res);
|
|
if (status)
|
|
goto out;
|
|
decode_getfattr(xdr, res->falloc_fattr, res->falloc_server);
|
|
out:
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* Decode READ_PLUS request
|
|
*/
|
|
static int nfs4_xdr_dec_read_plus(struct rpc_rqst *rqstp,
|
|
struct xdr_stream *xdr,
|
|
void *data)
|
|
{
|
|
struct nfs_pgio_res *res = data;
|
|
struct compound_hdr hdr;
|
|
int status;
|
|
|
|
xdr_set_scratch_buffer(xdr, res->scratch, READ_PLUS_SCRATCH_SIZE);
|
|
|
|
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_read_plus(xdr, res);
|
|
if (!status)
|
|
status = res->count;
|
|
out:
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* Decode SEEK request
|
|
*/
|
|
static int nfs4_xdr_dec_seek(struct rpc_rqst *rqstp,
|
|
struct xdr_stream *xdr,
|
|
void *data)
|
|
{
|
|
struct nfs42_seek_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_seek(xdr, res);
|
|
out:
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* Decode LAYOUTSTATS request
|
|
*/
|
|
static int nfs4_xdr_dec_layoutstats(struct rpc_rqst *rqstp,
|
|
struct xdr_stream *xdr,
|
|
void *data)
|
|
{
|
|
struct nfs42_layoutstat_res *res = data;
|
|
struct compound_hdr hdr;
|
|
int status, i;
|
|
|
|
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;
|
|
WARN_ON(res->num_dev > PNFS_LAYOUTSTATS_MAXDEV);
|
|
for (i = 0; i < res->num_dev; i++) {
|
|
status = decode_layoutstats(xdr);
|
|
if (status)
|
|
goto out;
|
|
}
|
|
out:
|
|
res->rpc_status = status;
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* Decode CLONE request
|
|
*/
|
|
static int nfs4_xdr_dec_clone(struct rpc_rqst *rqstp,
|
|
struct xdr_stream *xdr,
|
|
void *data)
|
|
{
|
|
struct nfs42_clone_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_savefh(xdr);
|
|
if (status)
|
|
goto out;
|
|
status = decode_putfh(xdr);
|
|
if (status)
|
|
goto out;
|
|
status = decode_clone(xdr);
|
|
if (status)
|
|
goto out;
|
|
decode_getfattr(xdr, res->dst_fattr, res->server);
|
|
out:
|
|
res->rpc_status = status;
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* Decode LAYOUTERROR request
|
|
*/
|
|
static int nfs4_xdr_dec_layouterror(struct rpc_rqst *rqstp,
|
|
struct xdr_stream *xdr,
|
|
void *data)
|
|
{
|
|
struct nfs42_layouterror_res *res = data;
|
|
struct compound_hdr hdr;
|
|
int status, i;
|
|
|
|
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);
|
|
|
|
for (i = 0; i < res->num_errors && status == 0; i++)
|
|
status = decode_layouterror(xdr);
|
|
out:
|
|
res->rpc_status = status;
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* Decode SETXATTR request
|
|
*/
|
|
static int nfs4_xdr_dec_setxattr(struct rpc_rqst *req, struct xdr_stream *xdr,
|
|
void *data)
|
|
{
|
|
struct nfs42_setxattrres *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, req);
|
|
if (status)
|
|
goto out;
|
|
status = decode_putfh(xdr);
|
|
if (status)
|
|
goto out;
|
|
status = decode_setxattr(xdr, &res->cinfo);
|
|
if (status)
|
|
goto out;
|
|
status = decode_getfattr(xdr, res->fattr, res->server);
|
|
out:
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* Decode GETXATTR request
|
|
*/
|
|
static int nfs4_xdr_dec_getxattr(struct rpc_rqst *rqstp,
|
|
struct xdr_stream *xdr, void *data)
|
|
{
|
|
struct nfs42_getxattrres *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_getxattr(xdr, res, rqstp);
|
|
out:
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* Decode LISTXATTR request
|
|
*/
|
|
static int nfs4_xdr_dec_listxattrs(struct rpc_rqst *rqstp,
|
|
struct xdr_stream *xdr, void *data)
|
|
{
|
|
struct nfs42_listxattrsres *res = data;
|
|
struct compound_hdr hdr;
|
|
int status;
|
|
|
|
xdr_set_scratch_page(xdr, res->scratch);
|
|
|
|
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_listxattrs(xdr, res);
|
|
out:
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* Decode REMOVEXATTR request
|
|
*/
|
|
static int nfs4_xdr_dec_removexattr(struct rpc_rqst *req,
|
|
struct xdr_stream *xdr, void *data)
|
|
{
|
|
struct nfs42_removexattrres *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, req);
|
|
if (status)
|
|
goto out;
|
|
status = decode_putfh(xdr);
|
|
if (status)
|
|
goto out;
|
|
|
|
status = decode_removexattr(xdr, &res->cinfo);
|
|
out:
|
|
return status;
|
|
}
|
|
#endif /* __LINUX_FS_NFS_NFS4_2XDR_H */
|