080518d810
fuse(4) was heavily instrumented with debug printf statements that could only be enabled with compile-time flags. They fell into three basic groups: 1. Totally redundant with dtrace FBT probes. These I deleted. 2. Print textual information, usually error messages. These I converted to SDT probes of the form fuse:fuse:FILE:trace. They work just like the old printf statements except they can be enabled at runtime with dtrace. They can be filtered by FILE and/or by priority. 3. More complicated probes that print detailed information. These I converted into ad-hoc SDT probes. Also, de-inline fuse_internal_cache_attrs. It's big enough to be a regular function, and this way it gets a dtrace FBT probe. This commit is a merge of r345304, r344914, r344703, and r344664 from projects/fuse2. Reviewed by: cem MFC after: 2 weeks Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D19667
169 lines
5.4 KiB
C
169 lines
5.4 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 2007-2009 Google Inc.
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* All rights reserved.
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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 are
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* met:
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*
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* * 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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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Google Inc. nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Copyright (C) 2005 Csaba Henk.
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* All rights reserved.
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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 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 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/types.h>
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#include <sys/module.h>
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#include <sys/systm.h>
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#include <sys/errno.h>
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/conf.h>
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#include <sys/mutex.h>
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#include <sys/proc.h>
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#include <sys/queue.h>
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#include <sys/mount.h>
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#include <sys/vnode.h>
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#include <sys/stat.h>
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#include <sys/file.h>
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#include <sys/buf.h>
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#include <sys/sdt.h>
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#include <sys/sysctl.h>
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#include "fuse.h"
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static void fuse_bringdown(eventhandler_tag eh_tag);
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static int fuse_loader(struct module *m, int what, void *arg);
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struct mtx fuse_mtx;
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extern struct vfsops fuse_vfsops;
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extern struct cdevsw fuse_cdevsw;
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extern struct vop_vector fuse_vnops;
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extern uma_zone_t fuse_pbuf_zone;
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static struct vfsconf fuse_vfsconf = {
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.vfc_version = VFS_VERSION,
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.vfc_name = "fusefs",
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.vfc_vfsops = &fuse_vfsops,
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.vfc_typenum = -1,
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.vfc_flags = VFCF_JAIL | VFCF_SYNTHETIC
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};
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SYSCTL_INT(_vfs_fusefs, OID_AUTO, kernelabi_major, CTLFLAG_RD,
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SYSCTL_NULL_INT_PTR, FUSE_KERNEL_VERSION, "FUSE kernel abi major version");
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SYSCTL_INT(_vfs_fusefs, OID_AUTO, kernelabi_minor, CTLFLAG_RD,
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SYSCTL_NULL_INT_PTR, FUSE_KERNEL_MINOR_VERSION, "FUSE kernel abi minor version");
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SDT_PROVIDER_DEFINE(fuse);
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/******************************
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*
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* >>> Module management stuff
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*
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******************************/
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static void
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fuse_bringdown(eventhandler_tag eh_tag)
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{
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fuse_ipc_destroy();
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fuse_device_destroy();
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mtx_destroy(&fuse_mtx);
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}
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static int
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fuse_loader(struct module *m, int what, void *arg)
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{
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static eventhandler_tag eh_tag = NULL;
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int err = 0;
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switch (what) {
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case MOD_LOAD: /* kldload */
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mtx_init(&fuse_mtx, "fuse_mtx", NULL, MTX_DEF);
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err = fuse_device_init();
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if (err) {
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mtx_destroy(&fuse_mtx);
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return (err);
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}
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fuse_ipc_init();
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fuse_pbuf_zone = pbuf_zsecond_create("fusepbuf", nswbuf / 2);
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/* vfs_modevent ignores its first arg */
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if ((err = vfs_modevent(NULL, what, &fuse_vfsconf)))
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fuse_bringdown(eh_tag);
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else
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printf("fuse-freebsd: version %s, FUSE ABI %d.%d\n",
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FUSE_FREEBSD_VERSION,
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FUSE_KERNEL_VERSION, FUSE_KERNEL_MINOR_VERSION);
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break;
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case MOD_UNLOAD:
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if ((err = vfs_modevent(NULL, what, &fuse_vfsconf)))
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return (err);
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fuse_bringdown(eh_tag);
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uma_zdestroy(fuse_pbuf_zone);
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break;
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default:
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return (EINVAL);
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}
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return (err);
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}
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/* Registering the module */
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static moduledata_t fuse_moddata = {
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"fusefs",
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fuse_loader,
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&fuse_vfsconf
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};
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DECLARE_MODULE(fusefs, fuse_moddata, SI_SUB_VFS, SI_ORDER_MIDDLE);
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MODULE_VERSION(fusefs, 1);
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