2005-04-16 16:20:36 -06:00
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/*
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* linux/fs/nfsd/nfs4callback.c
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*
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* Copyright (c) 2001 The Regents of the University of Michigan.
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* All rights reserved.
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*
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* Kendrick Smith <kmsmith@umich.edu>
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* Andy Adamson <andros@umich.edu>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <linux/module.h>
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#include <linux/list.h>
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#include <linux/inet.h>
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#include <linux/errno.h>
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#include <linux/delay.h>
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Detach sched.h from mm.h
First thing mm.h does is including sched.h solely for can_do_mlock() inline
function which has "current" dereference inside. By dealing with can_do_mlock()
mm.h can be detached from sched.h which is good. See below, why.
This patch
a) removes unconditional inclusion of sched.h from mm.h
b) makes can_do_mlock() normal function in mm/mlock.c
c) exports can_do_mlock() to not break compilation
d) adds sched.h inclusions back to files that were getting it indirectly.
e) adds less bloated headers to some files (asm/signal.h, jiffies.h) that were
getting them indirectly
Net result is:
a) mm.h users would get less code to open, read, preprocess, parse, ... if
they don't need sched.h
b) sched.h stops being dependency for significant number of files:
on x86_64 allmodconfig touching sched.h results in recompile of 4083 files,
after patch it's only 3744 (-8.3%).
Cross-compile tested on
all arm defconfigs, all mips defconfigs, all powerpc defconfigs,
alpha alpha-up
arm
i386 i386-up i386-defconfig i386-allnoconfig
ia64 ia64-up
m68k
mips
parisc parisc-up
powerpc powerpc-up
s390 s390-up
sparc sparc-up
sparc64 sparc64-up
um-x86_64
x86_64 x86_64-up x86_64-defconfig x86_64-allnoconfig
as well as my two usual configs.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-20 15:22:52 -06:00
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#include <linux/sched.h>
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2007-07-27 16:06:50 -06:00
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#include <linux/kthread.h>
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2005-04-16 16:20:36 -06:00
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#include <linux/sunrpc/xdr.h>
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#include <linux/sunrpc/svc.h>
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#include <linux/sunrpc/clnt.h>
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2009-09-10 03:25:59 -06:00
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#include <linux/sunrpc/svcsock.h>
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2005-04-16 16:20:36 -06:00
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#include <linux/nfsd/nfsd.h>
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#include <linux/nfsd/state.h>
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#include <linux/sunrpc/sched.h>
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#include <linux/nfs4.h>
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#define NFSDDBG_FACILITY NFSDDBG_PROC
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#define NFSPROC4_CB_NULL 0
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#define NFSPROC4_CB_COMPOUND 1
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2009-09-10 03:25:59 -06:00
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#define NFS4_STATEID_SIZE 16
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2005-04-16 16:20:36 -06:00
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/* Index of predefined Linux callback client operations */
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enum {
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2009-09-10 03:25:46 -06:00
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NFSPROC4_CLNT_CB_NULL = 0,
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2005-04-16 16:20:36 -06:00
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NFSPROC4_CLNT_CB_RECALL,
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2009-09-10 03:25:59 -06:00
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NFSPROC4_CLNT_CB_SEQUENCE,
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2005-04-16 16:20:36 -06:00
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};
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enum nfs_cb_opnum4 {
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OP_CB_RECALL = 4,
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2009-09-10 03:25:59 -06:00
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OP_CB_SEQUENCE = 11,
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2005-04-16 16:20:36 -06:00
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};
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#define NFS4_MAXTAGLEN 20
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#define NFS4_enc_cb_null_sz 0
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#define NFS4_dec_cb_null_sz 0
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#define cb_compound_enc_hdr_sz 4
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#define cb_compound_dec_hdr_sz (3 + (NFS4_MAXTAGLEN >> 2))
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2009-09-10 03:25:59 -06:00
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#define sessionid_sz (NFS4_MAX_SESSIONID_LEN >> 2)
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#define cb_sequence_enc_sz (sessionid_sz + 4 + \
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1 /* no referring calls list yet */)
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#define cb_sequence_dec_sz (op_dec_sz + sessionid_sz + 4)
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2005-04-16 16:20:36 -06:00
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#define op_enc_sz 1
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#define op_dec_sz 2
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#define enc_nfs4_fh_sz (1 + (NFS4_FHSIZE >> 2))
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2007-07-17 05:04:37 -06:00
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#define enc_stateid_sz (NFS4_STATEID_SIZE >> 2)
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2005-04-16 16:20:36 -06:00
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#define NFS4_enc_cb_recall_sz (cb_compound_enc_hdr_sz + \
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2009-09-10 03:25:59 -06:00
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cb_sequence_enc_sz + \
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2005-04-16 16:20:36 -06:00
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1 + enc_stateid_sz + \
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enc_nfs4_fh_sz)
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#define NFS4_dec_cb_recall_sz (cb_compound_dec_hdr_sz + \
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2009-09-10 03:25:59 -06:00
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cb_sequence_dec_sz + \
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2005-04-16 16:20:36 -06:00
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op_dec_sz)
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2009-09-10 03:26:12 -06:00
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struct nfs4_rpc_args {
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void *args_op;
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struct nfsd4_cb_sequence args_seq;
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};
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2005-04-16 16:20:36 -06:00
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/*
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* Generic encode routines from fs/nfs/nfs4xdr.c
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*/
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2006-10-20 00:29:01 -06:00
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static inline __be32 *
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xdr_writemem(__be32 *p, const void *ptr, int nbytes)
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2005-04-16 16:20:36 -06:00
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{
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int tmp = XDR_QUADLEN(nbytes);
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if (!tmp)
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return p;
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p[tmp-1] = 0;
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memcpy(p, ptr, nbytes);
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return p + tmp;
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}
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#define WRITE32(n) *p++ = htonl(n)
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#define WRITEMEM(ptr,nbytes) do { \
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p = xdr_writemem(p, ptr, nbytes); \
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} while (0)
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#define RESERVE_SPACE(nbytes) do { \
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p = xdr_reserve_space(xdr, nbytes); \
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2008-04-30 01:55:09 -06:00
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if (!p) dprintk("NFSD: RESERVE_SPACE(%d) failed in function %s\n", (int) (nbytes), __func__); \
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2005-04-16 16:20:36 -06:00
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BUG_ON(!p); \
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} while (0)
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/*
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* Generic decode routines from fs/nfs/nfs4xdr.c
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*/
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#define DECODE_TAIL \
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status = 0; \
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out: \
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return status; \
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xdr_error: \
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dprintk("NFSD: xdr error! (%s:%d)\n", __FILE__, __LINE__); \
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status = -EIO; \
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goto out
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#define READ32(x) (x) = ntohl(*p++)
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#define READ64(x) do { \
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(x) = (u64)ntohl(*p++) << 32; \
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(x) |= ntohl(*p++); \
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} while (0)
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#define READTIME(x) do { \
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p++; \
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(x.tv_sec) = ntohl(*p++); \
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(x.tv_nsec) = ntohl(*p++); \
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} while (0)
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#define READ_BUF(nbytes) do { \
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p = xdr_inline_decode(xdr, nbytes); \
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if (!p) { \
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2006-10-02 03:17:41 -06:00
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dprintk("NFSD: %s: reply buffer overflowed in line %d.\n", \
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2008-04-30 01:55:09 -06:00
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__func__, __LINE__); \
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2005-04-16 16:20:36 -06:00
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return -EIO; \
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} \
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} while (0)
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struct nfs4_cb_compound_hdr {
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2009-09-10 03:25:59 -06:00
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/* args */
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u32 ident; /* minorversion 0 only */
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2005-04-16 16:20:36 -06:00
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u32 nops;
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2009-06-15 19:20:50 -06:00
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__be32 *nops_p;
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2009-06-15 19:20:53 -06:00
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u32 minorversion;
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2009-09-10 03:25:59 -06:00
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/* res */
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int status;
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2005-04-16 16:20:36 -06:00
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u32 taglen;
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2009-06-15 19:20:50 -06:00
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char *tag;
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2005-04-16 16:20:36 -06:00
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};
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static struct {
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int stat;
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int errno;
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} nfs_cb_errtbl[] = {
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{ NFS4_OK, 0 },
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{ NFS4ERR_PERM, EPERM },
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{ NFS4ERR_NOENT, ENOENT },
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{ NFS4ERR_IO, EIO },
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{ NFS4ERR_NXIO, ENXIO },
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{ NFS4ERR_ACCESS, EACCES },
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{ NFS4ERR_EXIST, EEXIST },
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{ NFS4ERR_XDEV, EXDEV },
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{ NFS4ERR_NOTDIR, ENOTDIR },
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{ NFS4ERR_ISDIR, EISDIR },
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{ NFS4ERR_INVAL, EINVAL },
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{ NFS4ERR_FBIG, EFBIG },
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{ NFS4ERR_NOSPC, ENOSPC },
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{ NFS4ERR_ROFS, EROFS },
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{ NFS4ERR_MLINK, EMLINK },
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{ NFS4ERR_NAMETOOLONG, ENAMETOOLONG },
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{ NFS4ERR_NOTEMPTY, ENOTEMPTY },
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{ NFS4ERR_DQUOT, EDQUOT },
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{ NFS4ERR_STALE, ESTALE },
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{ NFS4ERR_BADHANDLE, EBADHANDLE },
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{ NFS4ERR_BAD_COOKIE, EBADCOOKIE },
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{ NFS4ERR_NOTSUPP, ENOTSUPP },
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{ NFS4ERR_TOOSMALL, ETOOSMALL },
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{ NFS4ERR_SERVERFAULT, ESERVERFAULT },
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{ NFS4ERR_BADTYPE, EBADTYPE },
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{ NFS4ERR_LOCKED, EAGAIN },
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{ NFS4ERR_RESOURCE, EREMOTEIO },
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{ NFS4ERR_SYMLINK, ELOOP },
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{ NFS4ERR_OP_ILLEGAL, EOPNOTSUPP },
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{ NFS4ERR_DEADLOCK, EDEADLK },
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{ -1, EIO }
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};
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static int
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nfs_cb_stat_to_errno(int stat)
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{
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int i;
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for (i = 0; nfs_cb_errtbl[i].stat != -1; i++) {
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if (nfs_cb_errtbl[i].stat == stat)
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return nfs_cb_errtbl[i].errno;
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}
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/* If we cannot translate the error, the recovery routines should
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* handle it.
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* Note: remaining NFSv4 error codes have values > 10000, so should
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* not conflict with native Linux error codes.
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*/
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return stat;
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}
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/*
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* XDR encode
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*/
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2009-06-15 19:20:50 -06:00
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static void
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2005-04-16 16:20:36 -06:00
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encode_cb_compound_hdr(struct xdr_stream *xdr, struct nfs4_cb_compound_hdr *hdr)
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{
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2006-10-20 00:29:01 -06:00
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__be32 * p;
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2005-04-16 16:20:36 -06:00
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RESERVE_SPACE(16);
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WRITE32(0); /* tag length is always 0 */
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2009-06-15 19:20:53 -06:00
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WRITE32(hdr->minorversion);
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2005-04-16 16:20:36 -06:00
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WRITE32(hdr->ident);
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2009-06-15 19:20:50 -06:00
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hdr->nops_p = p;
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2005-04-16 16:20:36 -06:00
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WRITE32(hdr->nops);
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}
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2009-06-15 19:20:50 -06:00
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static void encode_cb_nops(struct nfs4_cb_compound_hdr *hdr)
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{
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*hdr->nops_p = htonl(hdr->nops);
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}
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static void
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encode_cb_recall(struct xdr_stream *xdr, struct nfs4_delegation *dp,
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struct nfs4_cb_compound_hdr *hdr)
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2005-04-16 16:20:36 -06:00
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{
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2006-10-20 00:29:01 -06:00
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__be32 *p;
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2009-05-01 17:50:00 -06:00
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int len = dp->dl_fh.fh_size;
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2005-04-16 16:20:36 -06:00
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2009-05-01 17:50:00 -06:00
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RESERVE_SPACE(12+sizeof(dp->dl_stateid) + len);
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2005-04-16 16:20:36 -06:00
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WRITE32(OP_CB_RECALL);
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2009-05-01 17:50:00 -06:00
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WRITE32(dp->dl_stateid.si_generation);
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WRITEMEM(&dp->dl_stateid.si_opaque, sizeof(stateid_opaque_t));
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2009-05-01 17:57:46 -06:00
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WRITE32(0); /* truncate optimization not implemented */
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2005-04-16 16:20:36 -06:00
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WRITE32(len);
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2009-05-01 17:50:00 -06:00
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WRITEMEM(&dp->dl_fh.fh_base, len);
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2009-06-15 19:20:50 -06:00
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hdr->nops++;
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2005-04-16 16:20:36 -06:00
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}
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static int
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2006-10-20 00:29:01 -06:00
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nfs4_xdr_enc_cb_null(struct rpc_rqst *req, __be32 *p)
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2005-04-16 16:20:36 -06:00
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{
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struct xdr_stream xdrs, *xdr = &xdrs;
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xdr_init_encode(&xdrs, &req->rq_snd_buf, p);
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RESERVE_SPACE(0);
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return 0;
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}
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static int
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2009-05-01 17:50:00 -06:00
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nfs4_xdr_enc_cb_recall(struct rpc_rqst *req, __be32 *p, struct nfs4_delegation *args)
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2005-04-16 16:20:36 -06:00
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{
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struct xdr_stream xdr;
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struct nfs4_cb_compound_hdr hdr = {
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2009-05-01 17:50:00 -06:00
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.ident = args->dl_ident,
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2005-04-16 16:20:36 -06:00
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};
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xdr_init_encode(&xdr, &req->rq_snd_buf, p);
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encode_cb_compound_hdr(&xdr, &hdr);
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2009-06-15 19:20:50 -06:00
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encode_cb_recall(&xdr, args, &hdr);
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encode_cb_nops(&hdr);
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return 0;
|
2005-04-16 16:20:36 -06:00
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}
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static int
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|
decode_cb_compound_hdr(struct xdr_stream *xdr, struct nfs4_cb_compound_hdr *hdr){
|
2006-10-20 00:29:01 -06:00
|
|
|
__be32 *p;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
READ_BUF(8);
|
|
|
|
READ32(hdr->status);
|
|
|
|
READ32(hdr->taglen);
|
|
|
|
READ_BUF(hdr->taglen + 4);
|
|
|
|
hdr->tag = (char *)p;
|
|
|
|
p += XDR_QUADLEN(hdr->taglen);
|
|
|
|
READ32(hdr->nops);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
decode_cb_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
|
|
|
|
{
|
2006-10-20 00:29:01 -06:00
|
|
|
__be32 *p;
|
2005-04-16 16:20:36 -06:00
|
|
|
u32 op;
|
|
|
|
int32_t nfserr;
|
|
|
|
|
|
|
|
READ_BUF(8);
|
|
|
|
READ32(op);
|
|
|
|
if (op != expected) {
|
|
|
|
dprintk("NFSD: decode_cb_op_hdr: Callback server returned "
|
|
|
|
" operation %d but we issued a request for %d\n",
|
|
|
|
op, expected);
|
|
|
|
return -EIO;
|
|
|
|
}
|
|
|
|
READ32(nfserr);
|
|
|
|
if (nfserr != NFS_OK)
|
|
|
|
return -nfs_cb_stat_to_errno(nfserr);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
2006-10-20 00:29:01 -06:00
|
|
|
nfs4_xdr_dec_cb_null(struct rpc_rqst *req, __be32 *p)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
2006-10-20 00:29:01 -06:00
|
|
|
nfs4_xdr_dec_cb_recall(struct rpc_rqst *rqstp, __be32 *p)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
|
|
|
struct xdr_stream xdr;
|
|
|
|
struct nfs4_cb_compound_hdr hdr;
|
|
|
|
int status;
|
|
|
|
|
|
|
|
xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
|
|
|
|
status = decode_cb_compound_hdr(&xdr, &hdr);
|
|
|
|
if (status)
|
|
|
|
goto out;
|
|
|
|
status = decode_cb_op_hdr(&xdr, OP_CB_RECALL);
|
|
|
|
out:
|
|
|
|
return status;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* RPC procedure tables
|
|
|
|
*/
|
|
|
|
#define PROC(proc, call, argtype, restype) \
|
|
|
|
[NFSPROC4_CLNT_##proc] = { \
|
|
|
|
.p_proc = NFSPROC4_CB_##call, \
|
|
|
|
.p_encode = (kxdrproc_t) nfs4_xdr_##argtype, \
|
|
|
|
.p_decode = (kxdrproc_t) nfs4_xdr_##restype, \
|
2007-03-29 14:47:53 -06:00
|
|
|
.p_arglen = NFS4_##argtype##_sz, \
|
|
|
|
.p_replen = NFS4_##restype##_sz, \
|
2006-03-20 11:44:22 -07:00
|
|
|
.p_statidx = NFSPROC4_CB_##call, \
|
|
|
|
.p_name = #proc, \
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
2005-06-23 23:04:03 -06:00
|
|
|
static struct rpc_procinfo nfs4_cb_procedures[] = {
|
2005-04-16 16:20:36 -06:00
|
|
|
PROC(CB_NULL, NULL, enc_cb_null, dec_cb_null),
|
|
|
|
PROC(CB_RECALL, COMPOUND, enc_cb_recall, dec_cb_recall),
|
|
|
|
};
|
|
|
|
|
2005-06-23 23:04:03 -06:00
|
|
|
static struct rpc_version nfs_cb_version4 = {
|
2005-04-16 16:20:36 -06:00
|
|
|
.number = 1,
|
2006-03-24 04:15:34 -07:00
|
|
|
.nrprocs = ARRAY_SIZE(nfs4_cb_procedures),
|
2005-04-16 16:20:36 -06:00
|
|
|
.procs = nfs4_cb_procedures
|
|
|
|
};
|
|
|
|
|
|
|
|
static struct rpc_version * nfs_cb_version[] = {
|
|
|
|
NULL,
|
|
|
|
&nfs_cb_version4,
|
|
|
|
};
|
|
|
|
|
2008-03-28 14:04:56 -06:00
|
|
|
static struct rpc_program cb_program;
|
|
|
|
|
|
|
|
static struct rpc_stat cb_stats = {
|
|
|
|
.program = &cb_program
|
|
|
|
};
|
|
|
|
|
|
|
|
#define NFS4_CALLBACK 0x40000000
|
|
|
|
static struct rpc_program cb_program = {
|
|
|
|
.name = "nfs4_cb",
|
|
|
|
.number = NFS4_CALLBACK,
|
|
|
|
.nrvers = ARRAY_SIZE(nfs_cb_version),
|
|
|
|
.version = nfs_cb_version,
|
|
|
|
.stats = &cb_stats,
|
2008-12-23 14:19:00 -07:00
|
|
|
.pipe_dir_name = "/nfsd4_cb",
|
2008-03-28 14:04:56 -06:00
|
|
|
};
|
|
|
|
|
2009-03-05 15:18:10 -07:00
|
|
|
static int max_cb_time(void)
|
|
|
|
{
|
|
|
|
return max(NFSD_LEASE_TIME/10, (time_t)1) * HZ;
|
|
|
|
}
|
|
|
|
|
2007-07-27 16:06:50 -06:00
|
|
|
/* Reference counting, callback cleanup, etc., all look racy as heck.
|
|
|
|
* And why is cb_set an atomic? */
|
|
|
|
|
2009-02-23 11:45:27 -07:00
|
|
|
int setup_callback_client(struct nfs4_client *clp)
|
2007-07-27 16:06:50 -06:00
|
|
|
{
|
2009-04-29 17:09:19 -06:00
|
|
|
struct nfs4_cb_conn *cb = &clp->cl_cb_conn;
|
2006-08-22 18:06:21 -06:00
|
|
|
struct rpc_timeout timeparms = {
|
2009-03-05 15:18:10 -07:00
|
|
|
.to_initval = max_cb_time(),
|
|
|
|
.to_retries = 0,
|
2006-08-22 18:06:21 -06:00
|
|
|
};
|
|
|
|
struct rpc_create_args args = {
|
|
|
|
.protocol = IPPROTO_TCP,
|
2009-08-14 10:57:57 -06:00
|
|
|
.address = (struct sockaddr *) &cb->cb_addr,
|
|
|
|
.addrsize = cb->cb_addrlen,
|
2006-08-22 18:06:21 -06:00
|
|
|
.timeout = &timeparms,
|
2008-03-28 14:04:56 -06:00
|
|
|
.program = &cb_program,
|
2008-09-28 00:21:26 -06:00
|
|
|
.prognumber = cb->cb_prog,
|
2006-08-22 18:06:21 -06:00
|
|
|
.version = nfs_cb_version[1]->number,
|
2008-12-23 14:19:00 -07:00
|
|
|
.authflavor = clp->cl_flavor,
|
2008-06-09 14:51:31 -06:00
|
|
|
.flags = (RPC_CLNT_CREATE_NOPING | RPC_CLNT_CREATE_QUIET),
|
2008-12-23 14:17:40 -07:00
|
|
|
.client_name = clp->cl_principal,
|
2006-08-22 18:06:21 -06:00
|
|
|
};
|
2007-10-25 17:00:26 -06:00
|
|
|
struct rpc_clnt *client;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2009-02-22 16:52:13 -07:00
|
|
|
if (!clp->cl_principal && (clp->cl_flavor >= RPC_AUTH_GSS_KRB5))
|
2009-02-23 11:45:27 -07:00
|
|
|
return -EINVAL;
|
2008-12-23 14:17:40 -07:00
|
|
|
|
2006-08-22 18:06:21 -06:00
|
|
|
/* Create RPC client */
|
2007-10-25 17:00:26 -06:00
|
|
|
client = rpc_create(&args);
|
2009-02-23 11:45:27 -07:00
|
|
|
if (IS_ERR(client)) {
|
2009-02-22 17:43:45 -07:00
|
|
|
dprintk("NFSD: couldn't create callback client: %ld\n",
|
|
|
|
PTR_ERR(client));
|
2009-02-23 11:45:27 -07:00
|
|
|
return PTR_ERR(client);
|
|
|
|
}
|
|
|
|
cb->cb_client = client;
|
|
|
|
return 0;
|
2009-02-22 17:43:45 -07:00
|
|
|
|
|
|
|
}
|
|
|
|
|
2009-02-23 20:35:22 -07:00
|
|
|
static void warn_no_callback_path(struct nfs4_client *clp, int reason)
|
|
|
|
{
|
|
|
|
dprintk("NFSD: warning: no callback path to client %.*s: error %d\n",
|
|
|
|
(int)clp->cl_name.len, clp->cl_name.data, reason);
|
|
|
|
}
|
|
|
|
|
2009-03-05 13:01:11 -07:00
|
|
|
static void nfsd4_cb_probe_done(struct rpc_task *task, void *calldata)
|
|
|
|
{
|
|
|
|
struct nfs4_client *clp = calldata;
|
|
|
|
|
|
|
|
if (task->tk_status)
|
|
|
|
warn_no_callback_path(clp, task->tk_status);
|
|
|
|
else
|
2009-04-29 17:09:19 -06:00
|
|
|
atomic_set(&clp->cl_cb_conn.cb_set, 1);
|
2009-03-05 13:01:11 -07:00
|
|
|
put_nfs4_client(clp);
|
|
|
|
}
|
|
|
|
|
|
|
|
static const struct rpc_call_ops nfsd4_cb_probe_ops = {
|
|
|
|
.rpc_call_done = nfsd4_cb_probe_done,
|
|
|
|
};
|
|
|
|
|
2009-09-15 16:07:35 -06:00
|
|
|
static struct rpc_cred *callback_cred;
|
|
|
|
|
|
|
|
int set_callback_cred(void)
|
2009-02-23 22:42:10 -07:00
|
|
|
{
|
2009-09-15 16:07:35 -06:00
|
|
|
callback_cred = rpc_lookup_machine_cred();
|
|
|
|
if (!callback_cred)
|
|
|
|
return -ENOMEM;
|
|
|
|
return 0;
|
2009-02-23 22:42:10 -07:00
|
|
|
}
|
|
|
|
|
2009-09-15 16:07:35 -06:00
|
|
|
|
2009-03-05 13:01:11 -07:00
|
|
|
void do_probe_callback(struct nfs4_client *clp)
|
2009-02-22 17:43:45 -07:00
|
|
|
{
|
2009-04-29 17:09:19 -06:00
|
|
|
struct nfs4_cb_conn *cb = &clp->cl_cb_conn;
|
2009-02-22 17:43:45 -07:00
|
|
|
struct rpc_message msg = {
|
|
|
|
.rpc_proc = &nfs4_cb_procedures[NFSPROC4_CLNT_CB_NULL],
|
|
|
|
.rpc_argp = clp,
|
2009-09-15 16:07:35 -06:00
|
|
|
.rpc_cred = callback_cred
|
2009-02-22 17:43:45 -07:00
|
|
|
};
|
|
|
|
int status;
|
|
|
|
|
2009-03-05 13:01:11 -07:00
|
|
|
status = rpc_call_async(cb->cb_client, &msg, RPC_TASK_SOFT,
|
|
|
|
&nfsd4_cb_probe_ops, (void *)clp);
|
|
|
|
if (status) {
|
2009-02-23 20:35:22 -07:00
|
|
|
warn_no_callback_path(clp, status);
|
2009-03-05 13:01:11 -07:00
|
|
|
put_nfs4_client(clp);
|
|
|
|
}
|
2007-10-25 17:00:26 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Set up the callback client and put a NFSPROC4_CB_NULL on the wire...
|
|
|
|
*/
|
|
|
|
void
|
|
|
|
nfsd4_probe_callback(struct nfs4_client *clp)
|
|
|
|
{
|
2009-02-23 20:35:22 -07:00
|
|
|
int status;
|
2007-10-25 17:00:26 -06:00
|
|
|
|
2009-04-29 17:09:19 -06:00
|
|
|
BUG_ON(atomic_read(&clp->cl_cb_conn.cb_set));
|
2007-10-25 17:00:26 -06:00
|
|
|
|
2009-02-23 20:35:22 -07:00
|
|
|
status = setup_callback_client(clp);
|
|
|
|
if (status) {
|
|
|
|
warn_no_callback_path(clp, status);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2006-04-10 23:55:38 -06:00
|
|
|
/* the task holds a reference to the nfs4_client struct */
|
2005-04-16 16:20:36 -06:00
|
|
|
atomic_inc(&clp->cl_count);
|
|
|
|
|
2009-03-05 13:01:11 -07:00
|
|
|
do_probe_callback(clp);
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
2009-05-01 20:36:55 -06:00
|
|
|
static void nfsd4_cb_recall_done(struct rpc_task *task, void *calldata)
|
|
|
|
{
|
|
|
|
struct nfs4_delegation *dp = calldata;
|
|
|
|
struct nfs4_client *clp = dp->dl_client;
|
|
|
|
|
|
|
|
switch (task->tk_status) {
|
|
|
|
case -EIO:
|
|
|
|
/* Network partition? */
|
|
|
|
atomic_set(&clp->cl_cb_conn.cb_set, 0);
|
|
|
|
warn_no_callback_path(clp, task->tk_status);
|
|
|
|
case -EBADHANDLE:
|
|
|
|
case -NFS4ERR_BAD_STATEID:
|
|
|
|
/* Race: client probably got cb_recall
|
|
|
|
* before open reply granting delegation */
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
/* success, or error we can't handle */
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
if (dp->dl_retries--) {
|
|
|
|
rpc_delay(task, 2*HZ);
|
|
|
|
task->tk_status = 0;
|
|
|
|
rpc_restart_call(task);
|
|
|
|
} else {
|
|
|
|
atomic_set(&clp->cl_cb_conn.cb_set, 0);
|
|
|
|
warn_no_callback_path(clp, task->tk_status);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void nfsd4_cb_recall_release(void *calldata)
|
|
|
|
{
|
|
|
|
struct nfs4_delegation *dp = calldata;
|
|
|
|
struct nfs4_client *clp = dp->dl_client;
|
|
|
|
|
|
|
|
nfs4_put_delegation(dp);
|
|
|
|
put_nfs4_client(clp);
|
|
|
|
}
|
|
|
|
|
|
|
|
static const struct rpc_call_ops nfsd4_cb_recall_ops = {
|
|
|
|
.rpc_call_done = nfsd4_cb_recall_done,
|
|
|
|
.rpc_release = nfsd4_cb_recall_release,
|
|
|
|
};
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
/*
|
|
|
|
* called with dp->dl_count inc'ed.
|
|
|
|
*/
|
|
|
|
void
|
|
|
|
nfsd4_cb_recall(struct nfs4_delegation *dp)
|
|
|
|
{
|
|
|
|
struct nfs4_client *clp = dp->dl_client;
|
2009-04-29 17:09:19 -06:00
|
|
|
struct rpc_clnt *clnt = clp->cl_cb_conn.cb_client;
|
2005-04-16 16:20:36 -06:00
|
|
|
struct rpc_message msg = {
|
|
|
|
.rpc_proc = &nfs4_cb_procedures[NFSPROC4_CLNT_CB_RECALL],
|
2009-05-01 17:50:00 -06:00
|
|
|
.rpc_argp = dp,
|
2009-09-15 16:07:35 -06:00
|
|
|
.rpc_cred = callback_cred
|
2005-04-16 16:20:36 -06:00
|
|
|
};
|
2009-05-01 20:36:55 -06:00
|
|
|
int status;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2009-05-01 18:11:12 -06:00
|
|
|
dp->dl_retries = 1;
|
2009-05-01 20:36:55 -06:00
|
|
|
status = rpc_call_async(clnt, &msg, RPC_TASK_SOFT,
|
|
|
|
&nfsd4_cb_recall_ops, dp);
|
|
|
|
if (status) {
|
|
|
|
put_nfs4_client(clp);
|
|
|
|
nfs4_put_delegation(dp);
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
}
|