8f0e65c915
cloned from the old NFS client, plus additions for NFSv4. A review of this code is in progress, however it was felt by the reviewer that it could go in now, before code slush. Any changes required by the review can be committed as bug fixes later.
601 lines
17 KiB
C
601 lines
17 KiB
C
/*-
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* Copyright (c) 2009 Robert N. M. Watson
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* All rights reserved.
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*
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* This software was developed at the University of Cambridge Computer
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* Laboratory with support from a grant from Google, Inc.
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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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* 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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/conf.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/module.h>
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#include <sys/dtrace.h>
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#include <sys/dtrace_bsd.h>
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#include <fs/nfs/nfsproto.h>
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#include <fs/nfsclient/nfs_kdtrace.h>
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/*
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* dtnfscl is a DTrace provider that tracks the intent to perform RPCs
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* in the NFS client, as well as acess to and maintenance of the access and
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* attribute caches. This is not quite the same as RPCs, because NFS may
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* issue multiple RPC transactions in the event that authentication fails,
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* there's a jukebox error, or none at all if the access or attribute cache
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* hits. However, it cleanly represents the logical layer between RPC
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* transmission and vnode/vfs operations, providing access to state linking
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* the two.
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*/
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static int dtnfsclient_unload(void);
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static void dtnfsclient_getargdesc(void *, dtrace_id_t, void *,
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dtrace_argdesc_t *);
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static void dtnfsclient_provide(void *, dtrace_probedesc_t *);
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static void dtnfsclient_destroy(void *, dtrace_id_t, void *);
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static void dtnfsclient_enable(void *, dtrace_id_t, void *);
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static void dtnfsclient_disable(void *, dtrace_id_t, void *);
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static void dtnfsclient_load(void *);
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static dtrace_pattr_t dtnfsclient_attr = {
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{ DTRACE_STABILITY_STABLE, DTRACE_STABILITY_STABLE, DTRACE_CLASS_COMMON },
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{ DTRACE_STABILITY_PRIVATE, DTRACE_STABILITY_PRIVATE, DTRACE_CLASS_UNKNOWN },
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{ DTRACE_STABILITY_PRIVATE, DTRACE_STABILITY_PRIVATE, DTRACE_CLASS_UNKNOWN },
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{ DTRACE_STABILITY_STABLE, DTRACE_STABILITY_STABLE, DTRACE_CLASS_COMMON },
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{ DTRACE_STABILITY_STABLE, DTRACE_STABILITY_STABLE, DTRACE_CLASS_COMMON },
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};
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/*
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* Description of NFSv4, NFSv3 and (optional) NFSv2 probes for a procedure.
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*/
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struct dtnfsclient_rpc {
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char *nr_v4_name;
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char *nr_v3_name; /* Or NULL if none. */
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char *nr_v2_name; /* Or NULL if none. */
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/*
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* IDs for the start and done cases, for NFSv2, NFSv3 and NFSv4.
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*/
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uint32_t nr_v2_id_start, nr_v2_id_done;
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uint32_t nr_v3_id_start, nr_v3_id_done;
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uint32_t nr_v4_id_start, nr_v4_id_done;
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};
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/*
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* This table is indexed by NFSv3 procedure number, but also used for NFSv2
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* procedure names and NFSv4 operations.
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*/
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static struct dtnfsclient_rpc dtnfsclient_rpcs[NFS_NPROCS + 1] = {
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{ "null", "null", "null" },
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{ "getattr", "getattr", "getattr" },
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{ "setattr", "setattr", "setattr" },
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{ "lookup", "lookup", "lookup" },
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{ "access", "access", "noop" },
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{ "readlink", "readlink", "readlink" },
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{ "read", "read", "read" },
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{ "write", "write", "write" },
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{ "create", "create", "create" },
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{ "mkdir", "mkdir", "mkdir" },
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{ "symlink", "symlink", "symlink" },
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{ "mknod", "mknod" },
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{ "remove", "remove", "remove" },
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{ "rmdir", "rmdir", "rmdir" },
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{ "rename", "rename", "rename" },
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{ "link", "link", "link" },
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{ "readdir", "readdir", "readdir" },
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{ "readdirplus", "readdirplus" },
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{ "fsstat", "fsstat", "statfs" },
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{ "fsinfo", "fsinfo" },
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{ "pathconf", "pathconf" },
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{ "commit", "commit" },
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{ "lookupp" },
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{ "setclientid" },
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{ "setclientidcfrm" },
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{ "lock" },
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{ "locku" },
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{ "open" },
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{ "close" },
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{ "openconfirm" },
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{ "lockt" },
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{ "opendowngrade" },
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{ "renew" },
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{ "putrootfh" },
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{ "releaselckown" },
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{ "delegreturn" },
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{ "retdelegremove" },
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{ "retdelegrename1" },
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{ "retdelegrename2" },
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{ "getacl" },
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{ "setacl" },
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{ "noop", "noop", "noop" }
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};
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/*
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* Module name strings.
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*/
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static char *dtnfsclient_accesscache_str = "accesscache";
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static char *dtnfsclient_attrcache_str = "attrcache";
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static char *dtnfsclient_nfs2_str = "nfs2";
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static char *dtnfsclient_nfs3_str = "nfs3";
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static char *dtnfsclient_nfs4_str = "nfs4";
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/*
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* Function name strings.
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*/
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static char *dtnfsclient_flush_str = "flush";
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static char *dtnfsclient_load_str = "load";
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static char *dtnfsclient_get_str = "get";
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/*
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* Name strings.
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*/
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static char *dtnfsclient_done_str = "done";
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static char *dtnfsclient_hit_str = "hit";
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static char *dtnfsclient_miss_str = "miss";
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static char *dtnfsclient_start_str = "start";
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static dtrace_pops_t dtnfsclient_pops = {
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dtnfsclient_provide,
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NULL,
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dtnfsclient_enable,
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dtnfsclient_disable,
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NULL,
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NULL,
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dtnfsclient_getargdesc,
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NULL,
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NULL,
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dtnfsclient_destroy
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};
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static dtrace_provider_id_t dtnfsclient_id;
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/*
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* Most probes are generated from the above RPC table, but for access and
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* attribute caches, we have specific IDs we recognize and handle specially
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* in various spots.
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*/
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extern uint32_t nfscl_accesscache_flush_done_id;
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extern uint32_t nfscl_accesscache_get_hit_id;
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extern uint32_t nfscl_accesscache_get_miss_id;
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extern uint32_t nfscl_accesscache_load_done_id;
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extern uint32_t nfscl_attrcache_flush_done_id;
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extern uint32_t nfscl_attrcache_get_hit_id;
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extern uint32_t nfscl_attrcache_get_miss_id;
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extern uint32_t nfscl_attrcache_load_done_id;
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/*
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* When tracing on a procedure is enabled, the DTrace ID for an RPC event is
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* stored in one of these two NFS client-allocated arrays; 0 indicates that
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* the event is not being traced so probes should not be called.
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*
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* For simplicity, we allocate both v2, v3 and v4 arrays as NFS_NPROCS + 1, and
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* the v2, v3 arrays are simply sparse.
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*/
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extern uint32_t nfscl_nfs2_start_probes[NFS_NPROCS + 1];
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extern uint32_t nfscl_nfs2_done_probes[NFS_NPROCS + 1];
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extern uint32_t nfscl_nfs3_start_probes[NFS_NPROCS + 1];
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extern uint32_t nfscl_nfs3_done_probes[NFS_NPROCS + 1];
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extern uint32_t nfscl_nfs4_start_probes[NFS_NPROCS + 1];
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extern uint32_t nfscl_nfs4_done_probes[NFS_NPROCS + 1];
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/*
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* Look up a DTrace probe ID to see if it's associated with a "done" event --
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* if so, we will return a fourth argument type of "int".
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*/
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static int
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dtnfs234_isdoneprobe(dtrace_id_t id)
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{
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int i;
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for (i = 0; i < NFS_NPROCS + 1; i++) {
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if (dtnfsclient_rpcs[i].nr_v4_id_done == id ||
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dtnfsclient_rpcs[i].nr_v3_id_done == id ||
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dtnfsclient_rpcs[i].nr_v2_id_done == id)
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return (1);
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}
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return (0);
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}
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static void
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dtnfsclient_getargdesc(void *arg, dtrace_id_t id, void *parg,
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dtrace_argdesc_t *desc)
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{
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const char *p = NULL;
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if (id == nfscl_accesscache_flush_done_id ||
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id == nfscl_attrcache_flush_done_id ||
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id == nfscl_attrcache_get_miss_id) {
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switch (desc->dtargd_ndx) {
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case 0:
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p = "struct vnode *";
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break;
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default:
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desc->dtargd_ndx = DTRACE_ARGNONE;
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break;
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}
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} else if (id == nfscl_accesscache_get_hit_id ||
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id == nfscl_accesscache_get_miss_id) {
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switch (desc->dtargd_ndx) {
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case 0:
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p = "struct vnode *";
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break;
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case 1:
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p = "uid_t";
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break;
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case 2:
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p = "uint32_t";
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break;
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default:
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desc->dtargd_ndx = DTRACE_ARGNONE;
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break;
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}
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} else if (id == nfscl_accesscache_load_done_id) {
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switch (desc->dtargd_ndx) {
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case 0:
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p = "struct vnode *";
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break;
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case 1:
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p = "uid_t";
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break;
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case 2:
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p = "uint32_t";
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break;
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case 3:
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p = "int";
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break;
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default:
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desc->dtargd_ndx = DTRACE_ARGNONE;
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break;
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}
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} else if (id == nfscl_attrcache_get_hit_id) {
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switch (desc->dtargd_ndx) {
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case 0:
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p = "struct vnode *";
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break;
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case 1:
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p = "struct vattr *";
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break;
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default:
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desc->dtargd_ndx = DTRACE_ARGNONE;
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break;
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}
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} else if (id == nfscl_attrcache_load_done_id) {
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switch (desc->dtargd_ndx) {
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case 0:
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p = "struct vnode *";
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break;
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case 1:
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p = "struct vattr *";
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break;
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case 2:
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p = "int";
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break;
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default:
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desc->dtargd_ndx = DTRACE_ARGNONE;
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break;
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}
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} else {
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switch (desc->dtargd_ndx) {
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case 0:
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p = "struct vnode *";
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break;
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case 1:
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p = "struct mbuf *";
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break;
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case 2:
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p = "struct ucred *";
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break;
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case 3:
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p = "int";
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break;
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case 4:
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if (dtnfs234_isdoneprobe(id)) {
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p = "int";
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break;
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}
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/* FALLSTHROUGH */
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default:
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desc->dtargd_ndx = DTRACE_ARGNONE;
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break;
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}
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}
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if (p != NULL)
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strlcpy(desc->dtargd_native, p, sizeof(desc->dtargd_native));
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}
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static void
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dtnfsclient_provide(void *arg, dtrace_probedesc_t *desc)
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{
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int i;
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if (desc != NULL)
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return;
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/*
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* Register access cache probes.
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*/
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if (dtrace_probe_lookup(dtnfsclient_id, dtnfsclient_accesscache_str,
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dtnfsclient_flush_str, dtnfsclient_done_str) == 0) {
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nfscl_accesscache_flush_done_id = dtrace_probe_create(
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dtnfsclient_id, dtnfsclient_accesscache_str,
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dtnfsclient_flush_str, dtnfsclient_done_str, 0, NULL);
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}
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if (dtrace_probe_lookup(dtnfsclient_id, dtnfsclient_accesscache_str,
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dtnfsclient_get_str, dtnfsclient_hit_str) == 0) {
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nfscl_accesscache_get_hit_id = dtrace_probe_create(
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dtnfsclient_id, dtnfsclient_accesscache_str,
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dtnfsclient_get_str, dtnfsclient_hit_str, 0, NULL);
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}
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if (dtrace_probe_lookup(dtnfsclient_id, dtnfsclient_accesscache_str,
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dtnfsclient_get_str, dtnfsclient_miss_str) == 0) {
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nfscl_accesscache_get_miss_id = dtrace_probe_create(
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dtnfsclient_id, dtnfsclient_accesscache_str,
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dtnfsclient_get_str, dtnfsclient_miss_str, 0, NULL);
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}
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if (dtrace_probe_lookup(dtnfsclient_id, dtnfsclient_accesscache_str,
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dtnfsclient_load_str, dtnfsclient_done_str) == 0) {
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nfscl_accesscache_load_done_id = dtrace_probe_create(
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dtnfsclient_id, dtnfsclient_accesscache_str,
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dtnfsclient_load_str, dtnfsclient_done_str, 0, NULL);
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}
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/*
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* Register attribute cache probes.
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*/
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if (dtrace_probe_lookup(dtnfsclient_id, dtnfsclient_attrcache_str,
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dtnfsclient_flush_str, dtnfsclient_done_str) == 0) {
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nfscl_attrcache_flush_done_id = dtrace_probe_create(
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dtnfsclient_id, dtnfsclient_attrcache_str,
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dtnfsclient_flush_str, dtnfsclient_done_str, 0, NULL);
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}
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if (dtrace_probe_lookup(dtnfsclient_id, dtnfsclient_attrcache_str,
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dtnfsclient_get_str, dtnfsclient_hit_str) == 0) {
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nfscl_attrcache_get_hit_id = dtrace_probe_create(
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dtnfsclient_id, dtnfsclient_attrcache_str,
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dtnfsclient_get_str, dtnfsclient_hit_str, 0, NULL);
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}
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if (dtrace_probe_lookup(dtnfsclient_id, dtnfsclient_attrcache_str,
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dtnfsclient_get_str, dtnfsclient_miss_str) == 0) {
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nfscl_attrcache_get_miss_id = dtrace_probe_create(
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dtnfsclient_id, dtnfsclient_attrcache_str,
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dtnfsclient_get_str, dtnfsclient_miss_str, 0, NULL);
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}
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if (dtrace_probe_lookup(dtnfsclient_id, dtnfsclient_attrcache_str,
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dtnfsclient_load_str, dtnfsclient_done_str) == 0) {
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nfscl_attrcache_load_done_id = dtrace_probe_create(
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dtnfsclient_id, dtnfsclient_attrcache_str,
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dtnfsclient_load_str, dtnfsclient_done_str, 0, NULL);
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}
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/*
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* Register NFSv2 RPC procedures; note sparseness check for each slot
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* in the NFSv3, NFSv4 procnum-indexed array.
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*/
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for (i = 0; i < NFS_NPROCS + 1; i++) {
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if (dtnfsclient_rpcs[i].nr_v2_name != NULL &&
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dtrace_probe_lookup(dtnfsclient_id, dtnfsclient_nfs2_str,
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dtnfsclient_rpcs[i].nr_v2_name, dtnfsclient_start_str) ==
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0) {
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dtnfsclient_rpcs[i].nr_v2_id_start =
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dtrace_probe_create(dtnfsclient_id,
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dtnfsclient_nfs2_str,
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dtnfsclient_rpcs[i].nr_v2_name,
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dtnfsclient_start_str, 0,
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&nfscl_nfs2_start_probes[i]);
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}
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if (dtnfsclient_rpcs[i].nr_v2_name != NULL &&
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dtrace_probe_lookup(dtnfsclient_id, dtnfsclient_nfs2_str,
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dtnfsclient_rpcs[i].nr_v2_name, dtnfsclient_done_str) ==
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0) {
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dtnfsclient_rpcs[i].nr_v2_id_done =
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dtrace_probe_create(dtnfsclient_id,
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dtnfsclient_nfs2_str,
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dtnfsclient_rpcs[i].nr_v2_name,
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dtnfsclient_done_str, 0,
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&nfscl_nfs2_done_probes[i]);
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}
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}
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/*
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* Register NFSv3 RPC procedures; note sparseness check for each slot
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* in the NFSv4 procnum-indexed array.
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*/
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for (i = 0; i < NFS_NPROCS + 1; i++) {
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if (dtnfsclient_rpcs[i].nr_v3_name != NULL &&
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dtrace_probe_lookup(dtnfsclient_id, dtnfsclient_nfs3_str,
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dtnfsclient_rpcs[i].nr_v3_name, dtnfsclient_start_str) ==
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0) {
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dtnfsclient_rpcs[i].nr_v3_id_start =
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dtrace_probe_create(dtnfsclient_id,
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dtnfsclient_nfs3_str,
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dtnfsclient_rpcs[i].nr_v3_name,
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dtnfsclient_start_str, 0,
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&nfscl_nfs3_start_probes[i]);
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}
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if (dtnfsclient_rpcs[i].nr_v3_name != NULL &&
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dtrace_probe_lookup(dtnfsclient_id, dtnfsclient_nfs3_str,
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dtnfsclient_rpcs[i].nr_v3_name, dtnfsclient_done_str) ==
|
|
0) {
|
|
dtnfsclient_rpcs[i].nr_v3_id_done =
|
|
dtrace_probe_create(dtnfsclient_id,
|
|
dtnfsclient_nfs3_str,
|
|
dtnfsclient_rpcs[i].nr_v3_name,
|
|
dtnfsclient_done_str, 0,
|
|
&nfscl_nfs3_done_probes[i]);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Register NFSv4 RPC procedures.
|
|
*/
|
|
for (i = 0; i < NFS_NPROCS + 1; i++) {
|
|
if (dtrace_probe_lookup(dtnfsclient_id, dtnfsclient_nfs4_str,
|
|
dtnfsclient_rpcs[i].nr_v4_name, dtnfsclient_start_str) ==
|
|
0) {
|
|
dtnfsclient_rpcs[i].nr_v4_id_start =
|
|
dtrace_probe_create(dtnfsclient_id,
|
|
dtnfsclient_nfs4_str,
|
|
dtnfsclient_rpcs[i].nr_v4_name,
|
|
dtnfsclient_start_str, 0,
|
|
&nfscl_nfs4_start_probes[i]);
|
|
}
|
|
if (dtrace_probe_lookup(dtnfsclient_id, dtnfsclient_nfs4_str,
|
|
dtnfsclient_rpcs[i].nr_v4_name, dtnfsclient_done_str) ==
|
|
0) {
|
|
dtnfsclient_rpcs[i].nr_v4_id_done =
|
|
dtrace_probe_create(dtnfsclient_id,
|
|
dtnfsclient_nfs4_str,
|
|
dtnfsclient_rpcs[i].nr_v4_name,
|
|
dtnfsclient_done_str, 0,
|
|
&nfscl_nfs4_done_probes[i]);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
dtnfsclient_destroy(void *arg, dtrace_id_t id, void *parg)
|
|
{
|
|
}
|
|
|
|
static void
|
|
dtnfsclient_enable(void *arg, dtrace_id_t id, void *parg)
|
|
{
|
|
uint32_t *p = parg;
|
|
void *f = dtrace_probe;
|
|
|
|
if (id == nfscl_accesscache_flush_done_id)
|
|
dtrace_nfscl_accesscache_flush_done_probe = f;
|
|
else if (id == nfscl_accesscache_get_hit_id)
|
|
dtrace_nfscl_accesscache_get_hit_probe = f;
|
|
else if (id == nfscl_accesscache_get_miss_id)
|
|
dtrace_nfscl_accesscache_get_miss_probe = f;
|
|
else if (id == nfscl_accesscache_load_done_id)
|
|
dtrace_nfscl_accesscache_load_done_probe = f;
|
|
else if (id == nfscl_attrcache_flush_done_id)
|
|
dtrace_nfscl_attrcache_flush_done_probe = f;
|
|
else if (id == nfscl_attrcache_get_hit_id)
|
|
dtrace_nfscl_attrcache_get_hit_probe = f;
|
|
else if (id == nfscl_attrcache_get_miss_id)
|
|
dtrace_nfscl_attrcache_get_miss_probe = f;
|
|
else if (id == nfscl_attrcache_load_done_id)
|
|
dtrace_nfscl_attrcache_load_done_probe = f;
|
|
else
|
|
*p = id;
|
|
}
|
|
|
|
static void
|
|
dtnfsclient_disable(void *arg, dtrace_id_t id, void *parg)
|
|
{
|
|
uint32_t *p = parg;
|
|
|
|
if (id == nfscl_accesscache_flush_done_id)
|
|
dtrace_nfscl_accesscache_flush_done_probe = NULL;
|
|
else if (id == nfscl_accesscache_get_hit_id)
|
|
dtrace_nfscl_accesscache_get_hit_probe = NULL;
|
|
else if (id == nfscl_accesscache_get_miss_id)
|
|
dtrace_nfscl_accesscache_get_miss_probe = NULL;
|
|
else if (id == nfscl_accesscache_load_done_id)
|
|
dtrace_nfscl_accesscache_load_done_probe = NULL;
|
|
else if (id == nfscl_attrcache_flush_done_id)
|
|
dtrace_nfscl_attrcache_flush_done_probe = NULL;
|
|
else if (id == nfscl_attrcache_get_hit_id)
|
|
dtrace_nfscl_attrcache_get_hit_probe = NULL;
|
|
else if (id == nfscl_attrcache_get_miss_id)
|
|
dtrace_nfscl_attrcache_get_miss_probe = NULL;
|
|
else if (id == nfscl_attrcache_load_done_id)
|
|
dtrace_nfscl_attrcache_load_done_probe = NULL;
|
|
else
|
|
*p = 0;
|
|
}
|
|
|
|
static void
|
|
dtnfsclient_load(void *dummy)
|
|
{
|
|
|
|
if (dtrace_register("nfscl", &dtnfsclient_attr,
|
|
DTRACE_PRIV_USER, NULL, &dtnfsclient_pops, NULL,
|
|
&dtnfsclient_id) != 0)
|
|
return;
|
|
|
|
dtrace_nfscl_nfs234_start_probe =
|
|
(dtrace_nfsclient_nfs23_start_probe_func_t)dtrace_probe;
|
|
dtrace_nfscl_nfs234_done_probe =
|
|
(dtrace_nfsclient_nfs23_done_probe_func_t)dtrace_probe;
|
|
}
|
|
|
|
|
|
static int
|
|
dtnfsclient_unload()
|
|
{
|
|
|
|
dtrace_nfscl_nfs234_start_probe = NULL;
|
|
dtrace_nfscl_nfs234_done_probe = NULL;
|
|
|
|
return (dtrace_unregister(dtnfsclient_id));
|
|
}
|
|
|
|
static int
|
|
dtnfsclient_modevent(module_t mod __unused, int type, void *data __unused)
|
|
{
|
|
int error = 0;
|
|
|
|
switch (type) {
|
|
case MOD_LOAD:
|
|
break;
|
|
|
|
case MOD_UNLOAD:
|
|
break;
|
|
|
|
case MOD_SHUTDOWN:
|
|
break;
|
|
|
|
default:
|
|
error = EOPNOTSUPP;
|
|
break;
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
SYSINIT(dtnfsclient_load, SI_SUB_DTRACE_PROVIDER, SI_ORDER_ANY,
|
|
dtnfsclient_load, NULL);
|
|
SYSUNINIT(dtnfsclient_unload, SI_SUB_DTRACE_PROVIDER, SI_ORDER_ANY,
|
|
dtnfsclient_unload, NULL);
|
|
|
|
DEV_MODULE(dtnfscl, dtnfsclient_modevent, NULL);
|
|
MODULE_VERSION(dtnfscl, 1);
|
|
MODULE_DEPEND(dtnfscl, dtrace, 1, 1, 1);
|
|
MODULE_DEPEND(dtnfscl, opensolaris, 1, 1, 1);
|
|
MODULE_DEPEND(dtnfscl, nfscl, 1, 1, 1);
|
|
MODULE_DEPEND(dtnfscl, nfscommon, 1, 1, 1);
|