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![Greg Kroah-Hartman](/assets/img/avatar_default.png)
Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
1036 lines
26 KiB
C
1036 lines
26 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* linux/fs/nfs/callback_xdr.c
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*
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* Copyright (C) 2004 Trond Myklebust
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*
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* NFSv4 callback encode/decode procedures
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*/
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#include <linux/kernel.h>
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#include <linux/sunrpc/svc.h>
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#include <linux/nfs4.h>
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#include <linux/nfs_fs.h>
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#include <linux/ratelimit.h>
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#include <linux/printk.h>
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#include <linux/slab.h>
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#include <linux/sunrpc/bc_xprt.h>
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#include "nfs4_fs.h"
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#include "callback.h"
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#include "internal.h"
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#include "nfs4session.h"
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#define CB_OP_TAGLEN_MAXSZ (512)
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#define CB_OP_HDR_RES_MAXSZ (2 * 4) // opcode, status
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#define CB_OP_GETATTR_BITMAP_MAXSZ (4 * 4) // bitmap length, 3 bitmaps
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#define CB_OP_GETATTR_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ + \
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CB_OP_GETATTR_BITMAP_MAXSZ + \
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/* change, size, ctime, mtime */\
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(2 + 2 + 3 + 3) * 4)
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#define CB_OP_RECALL_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ)
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#if defined(CONFIG_NFS_V4_1)
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#define CB_OP_LAYOUTRECALL_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ)
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#define CB_OP_DEVICENOTIFY_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ)
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#define CB_OP_SEQUENCE_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ + \
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NFS4_MAX_SESSIONID_LEN + \
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(1 + 3) * 4) // seqid, 3 slotids
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#define CB_OP_RECALLANY_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ)
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#define CB_OP_RECALLSLOT_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ)
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#define CB_OP_NOTIFY_LOCK_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ)
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#endif /* CONFIG_NFS_V4_1 */
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#define NFSDBG_FACILITY NFSDBG_CALLBACK
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/* Internal error code */
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#define NFS4ERR_RESOURCE_HDR 11050
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struct callback_op {
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__be32 (*process_op)(void *, void *, struct cb_process_state *);
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__be32 (*decode_args)(struct svc_rqst *, struct xdr_stream *, void *);
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__be32 (*encode_res)(struct svc_rqst *, struct xdr_stream *,
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const void *);
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long res_maxsize;
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};
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static struct callback_op callback_ops[];
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static __be32 nfs4_callback_null(struct svc_rqst *rqstp)
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{
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return htonl(NFS4_OK);
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}
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static int nfs4_decode_void(struct svc_rqst *rqstp, __be32 *p)
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{
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return xdr_argsize_check(rqstp, p);
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}
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static int nfs4_encode_void(struct svc_rqst *rqstp, __be32 *p)
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{
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return xdr_ressize_check(rqstp, p);
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}
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static __be32 *read_buf(struct xdr_stream *xdr, size_t nbytes)
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{
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__be32 *p;
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p = xdr_inline_decode(xdr, nbytes);
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if (unlikely(p == NULL))
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printk(KERN_WARNING "NFS: NFSv4 callback reply buffer overflowed!\n");
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return p;
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}
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static __be32 decode_string(struct xdr_stream *xdr, unsigned int *len,
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const char **str, size_t maxlen)
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{
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ssize_t err;
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err = xdr_stream_decode_opaque_inline(xdr, (void **)str, maxlen);
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if (err < 0)
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return cpu_to_be32(NFS4ERR_RESOURCE);
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*len = err;
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return 0;
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}
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static __be32 decode_fh(struct xdr_stream *xdr, struct nfs_fh *fh)
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{
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__be32 *p;
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p = read_buf(xdr, 4);
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if (unlikely(p == NULL))
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return htonl(NFS4ERR_RESOURCE);
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fh->size = ntohl(*p);
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if (fh->size > NFS4_FHSIZE)
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return htonl(NFS4ERR_BADHANDLE);
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p = read_buf(xdr, fh->size);
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if (unlikely(p == NULL))
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return htonl(NFS4ERR_RESOURCE);
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memcpy(&fh->data[0], p, fh->size);
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memset(&fh->data[fh->size], 0, sizeof(fh->data) - fh->size);
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return 0;
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}
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static __be32 decode_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
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{
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__be32 *p;
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unsigned int attrlen;
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p = read_buf(xdr, 4);
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if (unlikely(p == NULL))
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return htonl(NFS4ERR_RESOURCE);
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attrlen = ntohl(*p);
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p = read_buf(xdr, attrlen << 2);
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if (unlikely(p == NULL))
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return htonl(NFS4ERR_RESOURCE);
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if (likely(attrlen > 0))
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bitmap[0] = ntohl(*p++);
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if (attrlen > 1)
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bitmap[1] = ntohl(*p);
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return 0;
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}
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static __be32 decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
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{
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__be32 *p;
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p = read_buf(xdr, NFS4_STATEID_SIZE);
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if (unlikely(p == NULL))
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return htonl(NFS4ERR_RESOURCE);
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memcpy(stateid->data, p, NFS4_STATEID_SIZE);
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return 0;
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}
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static __be32 decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
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{
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stateid->type = NFS4_DELEGATION_STATEID_TYPE;
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return decode_stateid(xdr, stateid);
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}
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static __be32 decode_compound_hdr_arg(struct xdr_stream *xdr, struct cb_compound_hdr_arg *hdr)
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{
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__be32 *p;
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__be32 status;
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status = decode_string(xdr, &hdr->taglen, &hdr->tag, CB_OP_TAGLEN_MAXSZ);
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if (unlikely(status != 0))
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return status;
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p = read_buf(xdr, 12);
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if (unlikely(p == NULL))
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return htonl(NFS4ERR_RESOURCE);
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hdr->minorversion = ntohl(*p++);
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/* Check for minor version support */
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if (hdr->minorversion <= NFS4_MAX_MINOR_VERSION) {
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hdr->cb_ident = ntohl(*p++); /* ignored by v4.1 and v4.2 */
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} else {
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pr_warn_ratelimited("NFS: %s: NFSv4 server callback with "
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"illegal minor version %u!\n",
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__func__, hdr->minorversion);
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return htonl(NFS4ERR_MINOR_VERS_MISMATCH);
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}
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hdr->nops = ntohl(*p);
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return 0;
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}
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static __be32 decode_op_hdr(struct xdr_stream *xdr, unsigned int *op)
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{
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__be32 *p;
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p = read_buf(xdr, 4);
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if (unlikely(p == NULL))
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return htonl(NFS4ERR_RESOURCE_HDR);
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*op = ntohl(*p);
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return 0;
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}
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static __be32 decode_getattr_args(struct svc_rqst *rqstp,
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struct xdr_stream *xdr, void *argp)
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{
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struct cb_getattrargs *args = argp;
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__be32 status;
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status = decode_fh(xdr, &args->fh);
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if (unlikely(status != 0))
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return status;
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return decode_bitmap(xdr, args->bitmap);
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}
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static __be32 decode_recall_args(struct svc_rqst *rqstp,
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struct xdr_stream *xdr, void *argp)
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{
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struct cb_recallargs *args = argp;
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__be32 *p;
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__be32 status;
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status = decode_delegation_stateid(xdr, &args->stateid);
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if (unlikely(status != 0))
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return status;
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p = read_buf(xdr, 4);
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if (unlikely(p == NULL))
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return htonl(NFS4ERR_RESOURCE);
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args->truncate = ntohl(*p);
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return decode_fh(xdr, &args->fh);
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}
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#if defined(CONFIG_NFS_V4_1)
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static __be32 decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
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{
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stateid->type = NFS4_LAYOUT_STATEID_TYPE;
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return decode_stateid(xdr, stateid);
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}
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static __be32 decode_layoutrecall_args(struct svc_rqst *rqstp,
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struct xdr_stream *xdr, void *argp)
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{
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struct cb_layoutrecallargs *args = argp;
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__be32 *p;
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__be32 status = 0;
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uint32_t iomode;
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p = read_buf(xdr, 4 * sizeof(uint32_t));
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if (unlikely(p == NULL))
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return htonl(NFS4ERR_BADXDR);
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args->cbl_layout_type = ntohl(*p++);
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/* Depite the spec's xdr, iomode really belongs in the FILE switch,
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* as it is unusable and ignored with the other types.
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*/
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iomode = ntohl(*p++);
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args->cbl_layoutchanged = ntohl(*p++);
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args->cbl_recall_type = ntohl(*p++);
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if (args->cbl_recall_type == RETURN_FILE) {
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args->cbl_range.iomode = iomode;
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status = decode_fh(xdr, &args->cbl_fh);
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if (unlikely(status != 0))
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return status;
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p = read_buf(xdr, 2 * sizeof(uint64_t));
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if (unlikely(p == NULL))
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return htonl(NFS4ERR_BADXDR);
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p = xdr_decode_hyper(p, &args->cbl_range.offset);
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p = xdr_decode_hyper(p, &args->cbl_range.length);
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return decode_layout_stateid(xdr, &args->cbl_stateid);
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} else if (args->cbl_recall_type == RETURN_FSID) {
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p = read_buf(xdr, 2 * sizeof(uint64_t));
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if (unlikely(p == NULL))
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return htonl(NFS4ERR_BADXDR);
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p = xdr_decode_hyper(p, &args->cbl_fsid.major);
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p = xdr_decode_hyper(p, &args->cbl_fsid.minor);
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} else if (args->cbl_recall_type != RETURN_ALL)
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return htonl(NFS4ERR_BADXDR);
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return 0;
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}
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static
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__be32 decode_devicenotify_args(struct svc_rqst *rqstp,
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struct xdr_stream *xdr,
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void *argp)
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{
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struct cb_devicenotifyargs *args = argp;
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__be32 *p;
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__be32 status = 0;
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u32 tmp;
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int n, i;
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args->ndevs = 0;
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/* Num of device notifications */
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p = read_buf(xdr, sizeof(uint32_t));
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if (unlikely(p == NULL)) {
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status = htonl(NFS4ERR_BADXDR);
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goto out;
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}
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n = ntohl(*p++);
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if (n <= 0)
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goto out;
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if (n > ULONG_MAX / sizeof(*args->devs)) {
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status = htonl(NFS4ERR_BADXDR);
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goto out;
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}
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args->devs = kmalloc_array(n, sizeof(*args->devs), GFP_KERNEL);
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if (!args->devs) {
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status = htonl(NFS4ERR_DELAY);
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goto out;
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}
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/* Decode each dev notification */
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for (i = 0; i < n; i++) {
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struct cb_devicenotifyitem *dev = &args->devs[i];
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p = read_buf(xdr, (4 * sizeof(uint32_t)) + NFS4_DEVICEID4_SIZE);
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if (unlikely(p == NULL)) {
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status = htonl(NFS4ERR_BADXDR);
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goto err;
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}
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tmp = ntohl(*p++); /* bitmap size */
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if (tmp != 1) {
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status = htonl(NFS4ERR_INVAL);
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goto err;
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}
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dev->cbd_notify_type = ntohl(*p++);
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if (dev->cbd_notify_type != NOTIFY_DEVICEID4_CHANGE &&
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dev->cbd_notify_type != NOTIFY_DEVICEID4_DELETE) {
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status = htonl(NFS4ERR_INVAL);
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goto err;
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}
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tmp = ntohl(*p++); /* opaque size */
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if (((dev->cbd_notify_type == NOTIFY_DEVICEID4_CHANGE) &&
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(tmp != NFS4_DEVICEID4_SIZE + 8)) ||
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((dev->cbd_notify_type == NOTIFY_DEVICEID4_DELETE) &&
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(tmp != NFS4_DEVICEID4_SIZE + 4))) {
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status = htonl(NFS4ERR_INVAL);
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goto err;
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}
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dev->cbd_layout_type = ntohl(*p++);
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memcpy(dev->cbd_dev_id.data, p, NFS4_DEVICEID4_SIZE);
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p += XDR_QUADLEN(NFS4_DEVICEID4_SIZE);
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if (dev->cbd_layout_type == NOTIFY_DEVICEID4_CHANGE) {
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p = read_buf(xdr, sizeof(uint32_t));
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if (unlikely(p == NULL)) {
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status = htonl(NFS4ERR_BADXDR);
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goto err;
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}
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dev->cbd_immediate = ntohl(*p++);
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} else {
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dev->cbd_immediate = 0;
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}
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args->ndevs++;
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dprintk("%s: type %d layout 0x%x immediate %d\n",
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__func__, dev->cbd_notify_type, dev->cbd_layout_type,
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dev->cbd_immediate);
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}
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out:
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dprintk("%s: status %d ndevs %d\n",
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__func__, ntohl(status), args->ndevs);
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return status;
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err:
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kfree(args->devs);
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goto out;
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}
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static __be32 decode_sessionid(struct xdr_stream *xdr,
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struct nfs4_sessionid *sid)
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{
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__be32 *p;
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p = read_buf(xdr, NFS4_MAX_SESSIONID_LEN);
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if (unlikely(p == NULL))
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return htonl(NFS4ERR_RESOURCE);
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memcpy(sid->data, p, NFS4_MAX_SESSIONID_LEN);
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return 0;
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}
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static __be32 decode_rc_list(struct xdr_stream *xdr,
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struct referring_call_list *rc_list)
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{
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__be32 *p;
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int i;
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__be32 status;
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status = decode_sessionid(xdr, &rc_list->rcl_sessionid);
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if (status)
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goto out;
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|
|
status = htonl(NFS4ERR_RESOURCE);
|
|
p = read_buf(xdr, sizeof(uint32_t));
|
|
if (unlikely(p == NULL))
|
|
goto out;
|
|
|
|
rc_list->rcl_nrefcalls = ntohl(*p++);
|
|
if (rc_list->rcl_nrefcalls) {
|
|
p = read_buf(xdr,
|
|
rc_list->rcl_nrefcalls * 2 * sizeof(uint32_t));
|
|
if (unlikely(p == NULL))
|
|
goto out;
|
|
rc_list->rcl_refcalls = kmalloc_array(rc_list->rcl_nrefcalls,
|
|
sizeof(*rc_list->rcl_refcalls),
|
|
GFP_KERNEL);
|
|
if (unlikely(rc_list->rcl_refcalls == NULL))
|
|
goto out;
|
|
for (i = 0; i < rc_list->rcl_nrefcalls; i++) {
|
|
rc_list->rcl_refcalls[i].rc_sequenceid = ntohl(*p++);
|
|
rc_list->rcl_refcalls[i].rc_slotid = ntohl(*p++);
|
|
}
|
|
}
|
|
status = 0;
|
|
|
|
out:
|
|
return status;
|
|
}
|
|
|
|
static __be32 decode_cb_sequence_args(struct svc_rqst *rqstp,
|
|
struct xdr_stream *xdr,
|
|
void *argp)
|
|
{
|
|
struct cb_sequenceargs *args = argp;
|
|
__be32 *p;
|
|
int i;
|
|
__be32 status;
|
|
|
|
status = decode_sessionid(xdr, &args->csa_sessionid);
|
|
if (status)
|
|
return status;
|
|
|
|
p = read_buf(xdr, 5 * sizeof(uint32_t));
|
|
if (unlikely(p == NULL))
|
|
return htonl(NFS4ERR_RESOURCE);
|
|
|
|
args->csa_addr = svc_addr(rqstp);
|
|
args->csa_sequenceid = ntohl(*p++);
|
|
args->csa_slotid = ntohl(*p++);
|
|
args->csa_highestslotid = ntohl(*p++);
|
|
args->csa_cachethis = ntohl(*p++);
|
|
args->csa_nrclists = ntohl(*p++);
|
|
args->csa_rclists = NULL;
|
|
if (args->csa_nrclists) {
|
|
args->csa_rclists = kmalloc_array(args->csa_nrclists,
|
|
sizeof(*args->csa_rclists),
|
|
GFP_KERNEL);
|
|
if (unlikely(args->csa_rclists == NULL))
|
|
return htonl(NFS4ERR_RESOURCE);
|
|
|
|
for (i = 0; i < args->csa_nrclists; i++) {
|
|
status = decode_rc_list(xdr, &args->csa_rclists[i]);
|
|
if (status) {
|
|
args->csa_nrclists = i;
|
|
goto out_free;
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
|
|
out_free:
|
|
for (i = 0; i < args->csa_nrclists; i++)
|
|
kfree(args->csa_rclists[i].rcl_refcalls);
|
|
kfree(args->csa_rclists);
|
|
return status;
|
|
}
|
|
|
|
static __be32 decode_recallany_args(struct svc_rqst *rqstp,
|
|
struct xdr_stream *xdr,
|
|
void *argp)
|
|
{
|
|
struct cb_recallanyargs *args = argp;
|
|
uint32_t bitmap[2];
|
|
__be32 *p, status;
|
|
|
|
p = read_buf(xdr, 4);
|
|
if (unlikely(p == NULL))
|
|
return htonl(NFS4ERR_BADXDR);
|
|
args->craa_objs_to_keep = ntohl(*p++);
|
|
status = decode_bitmap(xdr, bitmap);
|
|
if (unlikely(status))
|
|
return status;
|
|
args->craa_type_mask = bitmap[0];
|
|
|
|
return 0;
|
|
}
|
|
|
|
static __be32 decode_recallslot_args(struct svc_rqst *rqstp,
|
|
struct xdr_stream *xdr,
|
|
void *argp)
|
|
{
|
|
struct cb_recallslotargs *args = argp;
|
|
__be32 *p;
|
|
|
|
p = read_buf(xdr, 4);
|
|
if (unlikely(p == NULL))
|
|
return htonl(NFS4ERR_BADXDR);
|
|
args->crsa_target_highest_slotid = ntohl(*p++);
|
|
return 0;
|
|
}
|
|
|
|
static __be32 decode_lockowner(struct xdr_stream *xdr, struct cb_notify_lock_args *args)
|
|
{
|
|
__be32 *p;
|
|
unsigned int len;
|
|
|
|
p = read_buf(xdr, 12);
|
|
if (unlikely(p == NULL))
|
|
return htonl(NFS4ERR_BADXDR);
|
|
|
|
p = xdr_decode_hyper(p, &args->cbnl_owner.clientid);
|
|
len = be32_to_cpu(*p);
|
|
|
|
p = read_buf(xdr, len);
|
|
if (unlikely(p == NULL))
|
|
return htonl(NFS4ERR_BADXDR);
|
|
|
|
/* Only try to decode if the length is right */
|
|
if (len == 20) {
|
|
p += 2; /* skip "lock id:" */
|
|
args->cbnl_owner.s_dev = be32_to_cpu(*p++);
|
|
xdr_decode_hyper(p, &args->cbnl_owner.id);
|
|
args->cbnl_valid = true;
|
|
} else {
|
|
args->cbnl_owner.s_dev = 0;
|
|
args->cbnl_owner.id = 0;
|
|
args->cbnl_valid = false;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static __be32 decode_notify_lock_args(struct svc_rqst *rqstp,
|
|
struct xdr_stream *xdr, void *argp)
|
|
{
|
|
struct cb_notify_lock_args *args = argp;
|
|
__be32 status;
|
|
|
|
status = decode_fh(xdr, &args->cbnl_fh);
|
|
if (unlikely(status != 0))
|
|
return status;
|
|
return decode_lockowner(xdr, args);
|
|
}
|
|
|
|
#endif /* CONFIG_NFS_V4_1 */
|
|
|
|
static __be32 encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
|
|
{
|
|
if (unlikely(xdr_stream_encode_opaque(xdr, str, len) < 0))
|
|
return cpu_to_be32(NFS4ERR_RESOURCE);
|
|
return 0;
|
|
}
|
|
|
|
#define CB_SUPPORTED_ATTR0 (FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE)
|
|
#define CB_SUPPORTED_ATTR1 (FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY)
|
|
static __be32 encode_attr_bitmap(struct xdr_stream *xdr, const uint32_t *bitmap, __be32 **savep)
|
|
{
|
|
__be32 bm[2];
|
|
__be32 *p;
|
|
|
|
bm[0] = htonl(bitmap[0] & CB_SUPPORTED_ATTR0);
|
|
bm[1] = htonl(bitmap[1] & CB_SUPPORTED_ATTR1);
|
|
if (bm[1] != 0) {
|
|
p = xdr_reserve_space(xdr, 16);
|
|
if (unlikely(p == NULL))
|
|
return htonl(NFS4ERR_RESOURCE);
|
|
*p++ = htonl(2);
|
|
*p++ = bm[0];
|
|
*p++ = bm[1];
|
|
} else if (bm[0] != 0) {
|
|
p = xdr_reserve_space(xdr, 12);
|
|
if (unlikely(p == NULL))
|
|
return htonl(NFS4ERR_RESOURCE);
|
|
*p++ = htonl(1);
|
|
*p++ = bm[0];
|
|
} else {
|
|
p = xdr_reserve_space(xdr, 8);
|
|
if (unlikely(p == NULL))
|
|
return htonl(NFS4ERR_RESOURCE);
|
|
*p++ = htonl(0);
|
|
}
|
|
*savep = p;
|
|
return 0;
|
|
}
|
|
|
|
static __be32 encode_attr_change(struct xdr_stream *xdr, const uint32_t *bitmap, uint64_t change)
|
|
{
|
|
__be32 *p;
|
|
|
|
if (!(bitmap[0] & FATTR4_WORD0_CHANGE))
|
|
return 0;
|
|
p = xdr_reserve_space(xdr, 8);
|
|
if (unlikely(!p))
|
|
return htonl(NFS4ERR_RESOURCE);
|
|
p = xdr_encode_hyper(p, change);
|
|
return 0;
|
|
}
|
|
|
|
static __be32 encode_attr_size(struct xdr_stream *xdr, const uint32_t *bitmap, uint64_t size)
|
|
{
|
|
__be32 *p;
|
|
|
|
if (!(bitmap[0] & FATTR4_WORD0_SIZE))
|
|
return 0;
|
|
p = xdr_reserve_space(xdr, 8);
|
|
if (unlikely(!p))
|
|
return htonl(NFS4ERR_RESOURCE);
|
|
p = xdr_encode_hyper(p, size);
|
|
return 0;
|
|
}
|
|
|
|
static __be32 encode_attr_time(struct xdr_stream *xdr, const struct timespec *time)
|
|
{
|
|
__be32 *p;
|
|
|
|
p = xdr_reserve_space(xdr, 12);
|
|
if (unlikely(!p))
|
|
return htonl(NFS4ERR_RESOURCE);
|
|
p = xdr_encode_hyper(p, time->tv_sec);
|
|
*p = htonl(time->tv_nsec);
|
|
return 0;
|
|
}
|
|
|
|
static __be32 encode_attr_ctime(struct xdr_stream *xdr, const uint32_t *bitmap, const struct timespec *time)
|
|
{
|
|
if (!(bitmap[1] & FATTR4_WORD1_TIME_METADATA))
|
|
return 0;
|
|
return encode_attr_time(xdr,time);
|
|
}
|
|
|
|
static __be32 encode_attr_mtime(struct xdr_stream *xdr, const uint32_t *bitmap, const struct timespec *time)
|
|
{
|
|
if (!(bitmap[1] & FATTR4_WORD1_TIME_MODIFY))
|
|
return 0;
|
|
return encode_attr_time(xdr,time);
|
|
}
|
|
|
|
static __be32 encode_compound_hdr_res(struct xdr_stream *xdr, struct cb_compound_hdr_res *hdr)
|
|
{
|
|
__be32 status;
|
|
|
|
hdr->status = xdr_reserve_space(xdr, 4);
|
|
if (unlikely(hdr->status == NULL))
|
|
return htonl(NFS4ERR_RESOURCE);
|
|
status = encode_string(xdr, hdr->taglen, hdr->tag);
|
|
if (unlikely(status != 0))
|
|
return status;
|
|
hdr->nops = xdr_reserve_space(xdr, 4);
|
|
if (unlikely(hdr->nops == NULL))
|
|
return htonl(NFS4ERR_RESOURCE);
|
|
return 0;
|
|
}
|
|
|
|
static __be32 encode_op_hdr(struct xdr_stream *xdr, uint32_t op, __be32 res)
|
|
{
|
|
__be32 *p;
|
|
|
|
p = xdr_reserve_space(xdr, 8);
|
|
if (unlikely(p == NULL))
|
|
return htonl(NFS4ERR_RESOURCE_HDR);
|
|
*p++ = htonl(op);
|
|
*p = res;
|
|
return 0;
|
|
}
|
|
|
|
static __be32 encode_getattr_res(struct svc_rqst *rqstp, struct xdr_stream *xdr,
|
|
const void *resp)
|
|
{
|
|
const struct cb_getattrres *res = resp;
|
|
__be32 *savep = NULL;
|
|
__be32 status = res->status;
|
|
|
|
if (unlikely(status != 0))
|
|
goto out;
|
|
status = encode_attr_bitmap(xdr, res->bitmap, &savep);
|
|
if (unlikely(status != 0))
|
|
goto out;
|
|
status = encode_attr_change(xdr, res->bitmap, res->change_attr);
|
|
if (unlikely(status != 0))
|
|
goto out;
|
|
status = encode_attr_size(xdr, res->bitmap, res->size);
|
|
if (unlikely(status != 0))
|
|
goto out;
|
|
status = encode_attr_ctime(xdr, res->bitmap, &res->ctime);
|
|
if (unlikely(status != 0))
|
|
goto out;
|
|
status = encode_attr_mtime(xdr, res->bitmap, &res->mtime);
|
|
*savep = htonl((unsigned int)((char *)xdr->p - (char *)(savep+1)));
|
|
out:
|
|
return status;
|
|
}
|
|
|
|
#if defined(CONFIG_NFS_V4_1)
|
|
|
|
static __be32 encode_sessionid(struct xdr_stream *xdr,
|
|
const struct nfs4_sessionid *sid)
|
|
{
|
|
__be32 *p;
|
|
|
|
p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN);
|
|
if (unlikely(p == NULL))
|
|
return htonl(NFS4ERR_RESOURCE);
|
|
|
|
memcpy(p, sid, NFS4_MAX_SESSIONID_LEN);
|
|
return 0;
|
|
}
|
|
|
|
static __be32 encode_cb_sequence_res(struct svc_rqst *rqstp,
|
|
struct xdr_stream *xdr,
|
|
const void *resp)
|
|
{
|
|
const struct cb_sequenceres *res = resp;
|
|
__be32 *p;
|
|
__be32 status = res->csr_status;
|
|
|
|
if (unlikely(status != 0))
|
|
return status;
|
|
|
|
status = encode_sessionid(xdr, &res->csr_sessionid);
|
|
if (status)
|
|
return status;
|
|
|
|
p = xdr_reserve_space(xdr, 4 * sizeof(uint32_t));
|
|
if (unlikely(p == NULL))
|
|
return htonl(NFS4ERR_RESOURCE);
|
|
|
|
*p++ = htonl(res->csr_sequenceid);
|
|
*p++ = htonl(res->csr_slotid);
|
|
*p++ = htonl(res->csr_highestslotid);
|
|
*p++ = htonl(res->csr_target_highestslotid);
|
|
return 0;
|
|
}
|
|
|
|
static __be32
|
|
preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op)
|
|
{
|
|
if (op_nr == OP_CB_SEQUENCE) {
|
|
if (nop != 0)
|
|
return htonl(NFS4ERR_SEQUENCE_POS);
|
|
} else {
|
|
if (nop == 0)
|
|
return htonl(NFS4ERR_OP_NOT_IN_SESSION);
|
|
}
|
|
|
|
switch (op_nr) {
|
|
case OP_CB_GETATTR:
|
|
case OP_CB_RECALL:
|
|
case OP_CB_SEQUENCE:
|
|
case OP_CB_RECALL_ANY:
|
|
case OP_CB_RECALL_SLOT:
|
|
case OP_CB_LAYOUTRECALL:
|
|
case OP_CB_NOTIFY_DEVICEID:
|
|
case OP_CB_NOTIFY_LOCK:
|
|
*op = &callback_ops[op_nr];
|
|
break;
|
|
|
|
case OP_CB_NOTIFY:
|
|
case OP_CB_PUSH_DELEG:
|
|
case OP_CB_RECALLABLE_OBJ_AVAIL:
|
|
case OP_CB_WANTS_CANCELLED:
|
|
return htonl(NFS4ERR_NOTSUPP);
|
|
|
|
default:
|
|
return htonl(NFS4ERR_OP_ILLEGAL);
|
|
}
|
|
|
|
return htonl(NFS_OK);
|
|
}
|
|
|
|
static void nfs4_callback_free_slot(struct nfs4_session *session,
|
|
struct nfs4_slot *slot)
|
|
{
|
|
struct nfs4_slot_table *tbl = &session->bc_slot_table;
|
|
|
|
spin_lock(&tbl->slot_tbl_lock);
|
|
/*
|
|
* Let the state manager know callback processing done.
|
|
* A single slot, so highest used slotid is either 0 or -1
|
|
*/
|
|
nfs4_free_slot(tbl, slot);
|
|
spin_unlock(&tbl->slot_tbl_lock);
|
|
}
|
|
|
|
static void nfs4_cb_free_slot(struct cb_process_state *cps)
|
|
{
|
|
if (cps->slot) {
|
|
nfs4_callback_free_slot(cps->clp->cl_session, cps->slot);
|
|
cps->slot = NULL;
|
|
}
|
|
}
|
|
|
|
#else /* CONFIG_NFS_V4_1 */
|
|
|
|
static __be32
|
|
preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op)
|
|
{
|
|
return htonl(NFS4ERR_MINOR_VERS_MISMATCH);
|
|
}
|
|
|
|
static void nfs4_cb_free_slot(struct cb_process_state *cps)
|
|
{
|
|
}
|
|
#endif /* CONFIG_NFS_V4_1 */
|
|
|
|
#ifdef CONFIG_NFS_V4_2
|
|
static __be32
|
|
preprocess_nfs42_op(int nop, unsigned int op_nr, struct callback_op **op)
|
|
{
|
|
__be32 status = preprocess_nfs41_op(nop, op_nr, op);
|
|
if (status != htonl(NFS4ERR_OP_ILLEGAL))
|
|
return status;
|
|
|
|
if (op_nr == OP_CB_OFFLOAD)
|
|
return htonl(NFS4ERR_NOTSUPP);
|
|
return htonl(NFS4ERR_OP_ILLEGAL);
|
|
}
|
|
#else /* CONFIG_NFS_V4_2 */
|
|
static __be32
|
|
preprocess_nfs42_op(int nop, unsigned int op_nr, struct callback_op **op)
|
|
{
|
|
return htonl(NFS4ERR_MINOR_VERS_MISMATCH);
|
|
}
|
|
#endif /* CONFIG_NFS_V4_2 */
|
|
|
|
static __be32
|
|
preprocess_nfs4_op(unsigned int op_nr, struct callback_op **op)
|
|
{
|
|
switch (op_nr) {
|
|
case OP_CB_GETATTR:
|
|
case OP_CB_RECALL:
|
|
*op = &callback_ops[op_nr];
|
|
break;
|
|
default:
|
|
return htonl(NFS4ERR_OP_ILLEGAL);
|
|
}
|
|
|
|
return htonl(NFS_OK);
|
|
}
|
|
|
|
static __be32 process_op(int nop, struct svc_rqst *rqstp,
|
|
struct xdr_stream *xdr_in, void *argp,
|
|
struct xdr_stream *xdr_out, void *resp,
|
|
struct cb_process_state *cps)
|
|
{
|
|
struct callback_op *op = &callback_ops[0];
|
|
unsigned int op_nr;
|
|
__be32 status;
|
|
long maxlen;
|
|
__be32 res;
|
|
|
|
status = decode_op_hdr(xdr_in, &op_nr);
|
|
if (unlikely(status))
|
|
return status;
|
|
|
|
switch (cps->minorversion) {
|
|
case 0:
|
|
status = preprocess_nfs4_op(op_nr, &op);
|
|
break;
|
|
case 1:
|
|
status = preprocess_nfs41_op(nop, op_nr, &op);
|
|
break;
|
|
case 2:
|
|
status = preprocess_nfs42_op(nop, op_nr, &op);
|
|
break;
|
|
default:
|
|
status = htonl(NFS4ERR_MINOR_VERS_MISMATCH);
|
|
}
|
|
|
|
if (status == htonl(NFS4ERR_OP_ILLEGAL))
|
|
op_nr = OP_CB_ILLEGAL;
|
|
if (status)
|
|
goto encode_hdr;
|
|
|
|
if (cps->drc_status) {
|
|
status = cps->drc_status;
|
|
goto encode_hdr;
|
|
}
|
|
|
|
maxlen = xdr_out->end - xdr_out->p;
|
|
if (maxlen > 0 && maxlen < PAGE_SIZE) {
|
|
status = op->decode_args(rqstp, xdr_in, argp);
|
|
if (likely(status == 0))
|
|
status = op->process_op(argp, resp, cps);
|
|
} else
|
|
status = htonl(NFS4ERR_RESOURCE);
|
|
|
|
encode_hdr:
|
|
res = encode_op_hdr(xdr_out, op_nr, status);
|
|
if (unlikely(res))
|
|
return res;
|
|
if (op->encode_res != NULL && status == 0)
|
|
status = op->encode_res(rqstp, xdr_out, resp);
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* Decode, process and encode a COMPOUND
|
|
*/
|
|
static __be32 nfs4_callback_compound(struct svc_rqst *rqstp)
|
|
{
|
|
struct cb_compound_hdr_arg hdr_arg = { 0 };
|
|
struct cb_compound_hdr_res hdr_res = { NULL };
|
|
struct xdr_stream xdr_in, xdr_out;
|
|
__be32 *p, status;
|
|
struct cb_process_state cps = {
|
|
.drc_status = 0,
|
|
.clp = NULL,
|
|
.net = SVC_NET(rqstp),
|
|
};
|
|
unsigned int nops = 0;
|
|
|
|
xdr_init_decode(&xdr_in, &rqstp->rq_arg, rqstp->rq_arg.head[0].iov_base);
|
|
|
|
p = (__be32*)((char *)rqstp->rq_res.head[0].iov_base + rqstp->rq_res.head[0].iov_len);
|
|
xdr_init_encode(&xdr_out, &rqstp->rq_res, p);
|
|
|
|
status = decode_compound_hdr_arg(&xdr_in, &hdr_arg);
|
|
if (status == htonl(NFS4ERR_RESOURCE))
|
|
return rpc_garbage_args;
|
|
|
|
if (hdr_arg.minorversion == 0) {
|
|
cps.clp = nfs4_find_client_ident(SVC_NET(rqstp), hdr_arg.cb_ident);
|
|
if (!cps.clp || !check_gss_callback_principal(cps.clp, rqstp))
|
|
goto out_invalidcred;
|
|
}
|
|
|
|
cps.minorversion = hdr_arg.minorversion;
|
|
hdr_res.taglen = hdr_arg.taglen;
|
|
hdr_res.tag = hdr_arg.tag;
|
|
if (encode_compound_hdr_res(&xdr_out, &hdr_res) != 0)
|
|
return rpc_system_err;
|
|
|
|
while (status == 0 && nops != hdr_arg.nops) {
|
|
status = process_op(nops, rqstp, &xdr_in,
|
|
rqstp->rq_argp, &xdr_out, rqstp->rq_resp,
|
|
&cps);
|
|
nops++;
|
|
}
|
|
|
|
/* Buffer overflow in decode_ops_hdr or encode_ops_hdr. Return
|
|
* resource error in cb_compound status without returning op */
|
|
if (unlikely(status == htonl(NFS4ERR_RESOURCE_HDR))) {
|
|
status = htonl(NFS4ERR_RESOURCE);
|
|
nops--;
|
|
}
|
|
|
|
*hdr_res.status = status;
|
|
*hdr_res.nops = htonl(nops);
|
|
nfs4_cb_free_slot(&cps);
|
|
nfs_put_client(cps.clp);
|
|
return rpc_success;
|
|
|
|
out_invalidcred:
|
|
pr_warn_ratelimited("NFS: NFSv4 callback contains invalid cred\n");
|
|
return rpc_autherr_badcred;
|
|
}
|
|
|
|
/*
|
|
* Define NFS4 callback COMPOUND ops.
|
|
*/
|
|
static struct callback_op callback_ops[] = {
|
|
[0] = {
|
|
.res_maxsize = CB_OP_HDR_RES_MAXSZ,
|
|
},
|
|
[OP_CB_GETATTR] = {
|
|
.process_op = nfs4_callback_getattr,
|
|
.decode_args = decode_getattr_args,
|
|
.encode_res = encode_getattr_res,
|
|
.res_maxsize = CB_OP_GETATTR_RES_MAXSZ,
|
|
},
|
|
[OP_CB_RECALL] = {
|
|
.process_op = nfs4_callback_recall,
|
|
.decode_args = decode_recall_args,
|
|
.res_maxsize = CB_OP_RECALL_RES_MAXSZ,
|
|
},
|
|
#if defined(CONFIG_NFS_V4_1)
|
|
[OP_CB_LAYOUTRECALL] = {
|
|
.process_op = nfs4_callback_layoutrecall,
|
|
.decode_args = decode_layoutrecall_args,
|
|
.res_maxsize = CB_OP_LAYOUTRECALL_RES_MAXSZ,
|
|
},
|
|
[OP_CB_NOTIFY_DEVICEID] = {
|
|
.process_op = nfs4_callback_devicenotify,
|
|
.decode_args = decode_devicenotify_args,
|
|
.res_maxsize = CB_OP_DEVICENOTIFY_RES_MAXSZ,
|
|
},
|
|
[OP_CB_SEQUENCE] = {
|
|
.process_op = nfs4_callback_sequence,
|
|
.decode_args = decode_cb_sequence_args,
|
|
.encode_res = encode_cb_sequence_res,
|
|
.res_maxsize = CB_OP_SEQUENCE_RES_MAXSZ,
|
|
},
|
|
[OP_CB_RECALL_ANY] = {
|
|
.process_op = nfs4_callback_recallany,
|
|
.decode_args = decode_recallany_args,
|
|
.res_maxsize = CB_OP_RECALLANY_RES_MAXSZ,
|
|
},
|
|
[OP_CB_RECALL_SLOT] = {
|
|
.process_op = nfs4_callback_recallslot,
|
|
.decode_args = decode_recallslot_args,
|
|
.res_maxsize = CB_OP_RECALLSLOT_RES_MAXSZ,
|
|
},
|
|
[OP_CB_NOTIFY_LOCK] = {
|
|
.process_op = nfs4_callback_notify_lock,
|
|
.decode_args = decode_notify_lock_args,
|
|
.res_maxsize = CB_OP_NOTIFY_LOCK_RES_MAXSZ,
|
|
},
|
|
#endif /* CONFIG_NFS_V4_1 */
|
|
};
|
|
|
|
/*
|
|
* Define NFS4 callback procedures
|
|
*/
|
|
static const struct svc_procedure nfs4_callback_procedures1[] = {
|
|
[CB_NULL] = {
|
|
.pc_func = nfs4_callback_null,
|
|
.pc_decode = nfs4_decode_void,
|
|
.pc_encode = nfs4_encode_void,
|
|
.pc_xdrressize = 1,
|
|
},
|
|
[CB_COMPOUND] = {
|
|
.pc_func = nfs4_callback_compound,
|
|
.pc_encode = nfs4_encode_void,
|
|
.pc_argsize = 256,
|
|
.pc_ressize = 256,
|
|
.pc_xdrressize = NFS4_CALLBACK_BUFSIZE,
|
|
}
|
|
};
|
|
|
|
static unsigned int nfs4_callback_count1[ARRAY_SIZE(nfs4_callback_procedures1)];
|
|
const struct svc_version nfs4_callback_version1 = {
|
|
.vs_vers = 1,
|
|
.vs_nproc = ARRAY_SIZE(nfs4_callback_procedures1),
|
|
.vs_proc = nfs4_callback_procedures1,
|
|
.vs_count = nfs4_callback_count1,
|
|
.vs_xdrsize = NFS4_CALLBACK_XDRSIZE,
|
|
.vs_dispatch = NULL,
|
|
.vs_hidden = true,
|
|
.vs_need_cong_ctrl = true,
|
|
};
|
|
|
|
static unsigned int nfs4_callback_count4[ARRAY_SIZE(nfs4_callback_procedures1)];
|
|
const struct svc_version nfs4_callback_version4 = {
|
|
.vs_vers = 4,
|
|
.vs_nproc = ARRAY_SIZE(nfs4_callback_procedures1),
|
|
.vs_proc = nfs4_callback_procedures1,
|
|
.vs_count = nfs4_callback_count4,
|
|
.vs_xdrsize = NFS4_CALLBACK_XDRSIZE,
|
|
.vs_dispatch = NULL,
|
|
.vs_hidden = true,
|
|
.vs_need_cong_ctrl = true,
|
|
};
|