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[PATCH] v9fs: debug and support routines
This part of the patch contains debug and other misc routines. Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Eric Van Hensbergen
Linus Torvalds
parent
322b329ab7
commit
3ed8491c8a
70
fs/9p/debug.h
Normal file
70
fs/9p/debug.h
Normal file
@ -0,0 +1,70 @@
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/*
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* linux/fs/9p/debug.h - V9FS Debug Definitions
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*
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* Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
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* Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to:
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* Free Software Foundation
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* 51 Franklin Street, Fifth Floor
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* Boston, MA 02111-1301 USA
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*
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*/
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#define DEBUG_ERROR (1<<0)
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#define DEBUG_CURRENT (1<<1)
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#define DEBUG_9P (1<<2)
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#define DEBUG_VFS (1<<3)
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#define DEBUG_CONV (1<<4)
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#define DEBUG_MUX (1<<5)
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#define DEBUG_TRANS (1<<6)
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#define DEBUG_SLABS (1<<7)
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#define DEBUG_DUMP_PKT 0
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extern int v9fs_debug_level;
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#define dprintk(level, format, arg...) \
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do { \
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if((v9fs_debug_level & level)==level) \
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printk(KERN_NOTICE "-- %s (%d): " \
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format , __FUNCTION__, current->pid , ## arg); \
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} while(0)
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#define eprintk(level, format, arg...) \
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do { \
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printk(level "v9fs: %s (%d): " \
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format , __FUNCTION__, current->pid , ## arg); \
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} while(0)
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#if DEBUG_DUMP_PKT
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static inline void dump_data(const unsigned char *data, unsigned int datalen)
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{
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int i, j;
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int len = datalen;
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printk(KERN_DEBUG "data ");
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for (i = 0; i < len; i += 4) {
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for (j = 0; (j < 4) && (i + j < len); j++)
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printk(KERN_DEBUG "%02x", data[i + j]);
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printk(KERN_DEBUG " ");
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}
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printk(KERN_DEBUG "\n");
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}
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#else /* DEBUG_DUMP_PKT */
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static inline void dump_data(const unsigned char *data, unsigned int datalen)
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{
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}
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#endif /* DEBUG_DUMP_PKT */
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93
fs/9p/error.c
Normal file
93
fs/9p/error.c
Normal file
@ -0,0 +1,93 @@
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/*
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* linux/fs/9p/error.c
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*
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* Error string handling
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*
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* Plan 9 uses error strings, Unix uses error numbers. These functions
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* try to help manage that and provide for dynamically adding error
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* mappings.
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*
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* Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
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* Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to:
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* Free Software Foundation
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* 51 Franklin Street, Fifth Floor
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* Boston, MA 02111-1301 USA
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*
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*/
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#include <linux/config.h>
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#include <linux/module.h>
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#include <linux/list.h>
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#include <linux/jhash.h>
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#include "debug.h"
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#include "error.h"
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/**
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* v9fs_error_init - preload
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* @errstr: error string
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*
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*/
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int v9fs_error_init(void)
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{
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struct errormap *c;
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int bucket;
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/* initialize hash table */
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for (bucket = 0; bucket < ERRHASHSZ; bucket++)
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INIT_HLIST_HEAD(&hash_errmap[bucket]);
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/* load initial error map into hash table */
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for (c = errmap; c->name != NULL; c++) {
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bucket = jhash(c->name, strlen(c->name), 0) % ERRHASHSZ;
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INIT_HLIST_NODE(&c->list);
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hlist_add_head(&c->list, &hash_errmap[bucket]);
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}
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return 1;
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}
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/**
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* errstr2errno - convert error string to error number
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* @errstr: error string
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*
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*/
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int v9fs_errstr2errno(char *errstr)
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{
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int errno = 0;
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struct hlist_node *p = NULL;
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struct errormap *c = NULL;
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int bucket = jhash(errstr, strlen(errstr), 0) % ERRHASHSZ;
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hlist_for_each_entry(c, p, &hash_errmap[bucket], list) {
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if (!strcmp(c->name, errstr)) {
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errno = c->val;
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break;
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}
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}
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if (errno == 0) {
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/* TODO: if error isn't found, add it dynamically */
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printk(KERN_ERR "%s: errstr :%s: not found\n", __FUNCTION__,
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errstr);
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errno = 1;
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}
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return -errno;
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}
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181
fs/9p/error.h
Normal file
181
fs/9p/error.h
Normal file
@ -0,0 +1,181 @@
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/*
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* linux/fs/9p/error.h
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*
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* Huge Nasty Error Table
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*
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* Plan 9 uses error strings, Unix uses error numbers. This table tries to
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* match UNIX strings and Plan 9 strings to unix error numbers. It is used
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* to preload the dynamic error table which can also track user-specific error
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* strings.
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*
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* Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
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* Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
|
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to:
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* Free Software Foundation
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* 51 Franklin Street, Fifth Floor
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* Boston, MA 02111-1301 USA
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*
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*/
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#include <linux/errno.h>
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struct errormap {
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char *name;
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int val;
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struct hlist_node list;
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};
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#define ERRHASHSZ 32
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static struct hlist_head hash_errmap[ERRHASHSZ];
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/* FixMe - reduce to a reasonable size */
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static struct errormap errmap[] = {
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{"Operation not permitted", 1},
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{"wstat prohibited", 1},
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{"No such file or directory", 2},
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{"file not found", 2},
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{"Interrupted system call", 4},
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{"Input/output error", 5},
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{"No such device or address", 6},
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{"Argument list too long", 7},
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{"Bad file descriptor", 9},
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{"Resource temporarily unavailable", 11},
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{"Cannot allocate memory", 12},
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{"Permission denied", 13},
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{"Bad address", 14},
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{"Block device required", 15},
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{"Device or resource busy", 16},
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{"File exists", 17},
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{"Invalid cross-device link", 18},
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{"No such device", 19},
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{"Not a directory", 20},
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{"Is a directory", 21},
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{"Invalid argument", 22},
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{"Too many open files in system", 23},
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{"Too many open files", 24},
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{"Text file busy", 26},
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{"File too large", 27},
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{"No space left on device", 28},
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{"Illegal seek", 29},
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{"Read-only file system", 30},
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{"Too many links", 31},
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{"Broken pipe", 32},
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{"Numerical argument out of domain", 33},
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{"Numerical result out of range", 34},
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{"Resource deadlock avoided", 35},
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{"File name too long", 36},
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{"No locks available", 37},
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{"Function not implemented", 38},
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{"Directory not empty", 39},
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{"Too many levels of symbolic links", 40},
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{"Unknown error 41", 41},
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{"No message of desired type", 42},
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{"Identifier removed", 43},
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{"File locking deadlock error", 58},
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{"No data available", 61},
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{"Machine is not on the network", 64},
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{"Package not installed", 65},
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{"Object is remote", 66},
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{"Link has been severed", 67},
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{"Communication error on send", 70},
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{"Protocol error", 71},
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{"Bad message", 74},
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{"File descriptor in bad state", 77},
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{"Streams pipe error", 86},
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{"Too many users", 87},
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{"Socket operation on non-socket", 88},
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{"Message too long", 90},
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{"Protocol not available", 92},
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{"Protocol not supported", 93},
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{"Socket type not supported", 94},
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{"Operation not supported", 95},
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{"Protocol family not supported", 96},
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{"Network is down", 100},
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{"Network is unreachable", 101},
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{"Network dropped connection on reset", 102},
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{"Software caused connection abort", 103},
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{"Connection reset by peer", 104},
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{"No buffer space available", 105},
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{"Transport endpoint is already connected", 106},
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{"Transport endpoint is not connected", 107},
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{"Cannot send after transport endpoint shutdown", 108},
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{"Connection timed out", 110},
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{"Connection refused", 111},
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{"Host is down", 112},
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{"No route to host", 113},
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{"Operation already in progress", 114},
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{"Operation now in progress", 115},
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{"Is a named type file", 120},
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{"Remote I/O error", 121},
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{"Disk quota exceeded", 122},
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{"Operation canceled", 125},
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{"Unknown error 126", 126},
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{"Unknown error 127", 127},
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/* errors from fossil, vacfs, and u9fs */
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{"fid unknown or out of range", EBADF},
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{"permission denied", EACCES},
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{"file does not exist", ENOENT},
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{"authentication failed", ECONNREFUSED},
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{"bad offset in directory read", ESPIPE},
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{"bad use of fid", EBADF},
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{"wstat can't convert between files and directories", EPERM},
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{"directory is not empty", ENOTEMPTY},
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{"file exists", EEXIST},
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{"file already exists", EEXIST},
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{"file or directory already exists", EEXIST},
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{"fid already in use", EBADF},
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{"file in use", ETXTBSY},
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{"i/o error", EIO},
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{"file already open for I/O", ETXTBSY},
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{"illegal mode", EINVAL},
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{"illegal name", ENAMETOOLONG},
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{"not a directory", ENOTDIR},
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{"not a member of proposed group", EINVAL},
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{"not owner", EACCES},
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{"only owner can change group in wstat", EACCES},
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{"read only file system", EROFS},
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{"no access to special file", EPERM},
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{"i/o count too large", EIO},
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{"unknown group", EINVAL},
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{"unknown user", EINVAL},
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{"bogus wstat buffer", EPROTO},
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{"exclusive use file already open", EAGAIN},
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{"corrupted directory entry", EIO},
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{"corrupted file entry", EIO},
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{"corrupted block label", EIO},
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{"corrupted meta data", EIO},
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{"illegal offset", EINVAL},
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{"illegal path element", ENOENT},
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{"root of file system is corrupted", EIO},
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{"corrupted super block", EIO},
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{"protocol botch", EPROTO},
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{"file system is full", ENOSPC},
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{"file is in use", EAGAIN},
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{"directory entry is not allocated", ENOENT},
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{"file is read only", EROFS},
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{"file has been removed", EIDRM},
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{"only support truncation to zero length", EPERM},
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{"cannot remove root", EPERM},
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{"file too big", EFBIG},
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{"venti i/o error", EIO},
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/* these are not errors */
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{"u9fs rhostsauth: no authentication required", 0},
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{"u9fs authnone: no authentication required", 0},
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{NULL, -1}
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};
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extern int v9fs_error_init(void);
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extern int v9fs_errstr2errno(char *errstr);
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241
fs/9p/fid.c
Normal file
241
fs/9p/fid.c
Normal file
@ -0,0 +1,241 @@
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/*
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* V9FS FID Management
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*
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* Copyright (C) 2005 by Eric Van Hensbergen <ericvh@gmail.com>
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*
|
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* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to:
|
||||
* Free Software Foundation
|
||||
* 51 Franklin Street, Fifth Floor
|
||||
* Boston, MA 02111-1301 USA
|
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*
|
||||
*/
|
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#include <linux/config.h>
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#include <linux/module.h>
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#include <linux/errno.h>
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#include <linux/fs.h>
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#include <linux/idr.h>
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#include "debug.h"
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#include "v9fs.h"
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#include "9p.h"
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#include "v9fs_vfs.h"
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#include "transport.h"
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#include "mux.h"
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#include "conv.h"
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#include "fid.h"
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/**
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* v9fs_fid_insert - add a fid to a dentry
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* @fid: fid to add
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* @dentry: dentry that it is being added to
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*
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*/
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static int v9fs_fid_insert(struct v9fs_fid *fid, struct dentry *dentry)
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{
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struct list_head *fid_list = (struct list_head *)dentry->d_fsdata;
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dprintk(DEBUG_9P, "fid %d (%p) dentry %s (%p)\n", fid->fid, fid,
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dentry->d_iname, dentry);
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if (dentry->d_fsdata == NULL) {
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dentry->d_fsdata =
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kmalloc(sizeof(struct list_head), GFP_KERNEL);
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if (dentry->d_fsdata == NULL) {
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dprintk(DEBUG_ERROR, "Out of memory\n");
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return -ENOMEM;
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}
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fid_list = (struct list_head *)dentry->d_fsdata;
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INIT_LIST_HEAD(fid_list); /* Initialize list head */
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}
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fid->uid = current->uid;
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fid->pid = current->pid;
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list_add(&fid->list, fid_list);
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return 0;
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}
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|
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/**
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* v9fs_fid_create - allocate a FID structure
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* @dentry - dentry to link newly created fid to
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*
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*/
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struct v9fs_fid *v9fs_fid_create(struct dentry *dentry)
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{
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struct v9fs_fid *new;
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new = kmalloc(sizeof(struct v9fs_fid), GFP_KERNEL);
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if (new == NULL) {
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dprintk(DEBUG_ERROR, "Out of Memory\n");
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return ERR_PTR(-ENOMEM);
|
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}
|
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|
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new->fid = -1;
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new->fidopen = 0;
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new->fidcreate = 0;
|
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new->fidclunked = 0;
|
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new->iounit = 0;
|
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if (v9fs_fid_insert(new, dentry) == 0)
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return new;
|
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else {
|
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dprintk(DEBUG_ERROR, "Problems inserting to dentry\n");
|
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kfree(new);
|
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return NULL;
|
||||
}
|
||||
}
|
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|
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/**
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* v9fs_fid_destroy - deallocate a FID structure
|
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* @fid: fid to destroy
|
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*
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*/
|
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|
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void v9fs_fid_destroy(struct v9fs_fid *fid)
|
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{
|
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list_del(&fid->list);
|
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kfree(fid);
|
||||
}
|
||||
|
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/**
|
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* v9fs_fid_lookup - retrieve the right fid from a particular dentry
|
||||
* @dentry: dentry to look for fid in
|
||||
* @type: intent of lookup (operation or traversal)
|
||||
*
|
||||
* search list of fids associated with a dentry for a fid with a matching
|
||||
* thread id or uid. If that fails, look up the dentry's parents to see if you
|
||||
* can find a matching fid.
|
||||
*
|
||||
*/
|
||||
|
||||
struct v9fs_fid *v9fs_fid_lookup(struct dentry *dentry, int type)
|
||||
{
|
||||
struct list_head *fid_list = (struct list_head *)dentry->d_fsdata;
|
||||
struct v9fs_fid *current_fid = NULL;
|
||||
struct v9fs_fid *temp = NULL;
|
||||
struct v9fs_fid *return_fid = NULL;
|
||||
int found_parent = 0;
|
||||
int found_user = 0;
|
||||
|
||||
dprintk(DEBUG_9P, " dentry: %s (%p) type %d\n", dentry->d_iname, dentry,
|
||||
type);
|
||||
|
||||
if (fid_list && !list_empty(fid_list)) {
|
||||
list_for_each_entry_safe(current_fid, temp, fid_list, list) {
|
||||
if (current_fid->uid == current->uid) {
|
||||
if (return_fid == NULL) {
|
||||
if ((type == FID_OP)
|
||||
|| (!current_fid->fidopen)) {
|
||||
return_fid = current_fid;
|
||||
found_user = 1;
|
||||
}
|
||||
}
|
||||
}
|
||||
if (current_fid->pid == current->real_parent->pid) {
|
||||
if ((return_fid == NULL) || (found_parent)
|
||||
|| (found_user)) {
|
||||
if ((type == FID_OP)
|
||||
|| (!current_fid->fidopen)) {
|
||||
return_fid = current_fid;
|
||||
found_parent = 1;
|
||||
found_user = 0;
|
||||
}
|
||||
}
|
||||
}
|
||||
if (current_fid->pid == current->pid) {
|
||||
if ((type == FID_OP) ||
|
||||
(!current_fid->fidopen)) {
|
||||
return_fid = current_fid;
|
||||
found_parent = 0;
|
||||
found_user = 0;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/* we are at the root but didn't match */
|
||||
if ((!return_fid) && (dentry->d_parent == dentry)) {
|
||||
/* TODO: clone attach with new uid */
|
||||
return_fid = current_fid;
|
||||
}
|
||||
|
||||
if (!return_fid) {
|
||||
struct dentry *par = current->fs->pwd->d_parent;
|
||||
int count = 1;
|
||||
while (par != NULL) {
|
||||
if (par == dentry)
|
||||
break;
|
||||
count++;
|
||||
if (par == par->d_parent) {
|
||||
dprintk(DEBUG_ERROR,
|
||||
"got to root without finding dentry\n");
|
||||
break;
|
||||
}
|
||||
par = par->d_parent;
|
||||
}
|
||||
|
||||
/* XXX - there may be some duplication we can get rid of */
|
||||
if (par == dentry) {
|
||||
/* we need to fid_lookup the starting point */
|
||||
int fidnum = -1;
|
||||
int oldfid = -1;
|
||||
int result = -1;
|
||||
struct v9fs_session_info *v9ses =
|
||||
v9fs_inode2v9ses(current->fs->pwd->d_inode);
|
||||
|
||||
current_fid =
|
||||
v9fs_fid_lookup(current->fs->pwd, FID_WALK);
|
||||
if (current_fid == NULL) {
|
||||
dprintk(DEBUG_ERROR,
|
||||
"process cwd doesn't have a fid\n");
|
||||
return return_fid;
|
||||
}
|
||||
oldfid = current_fid->fid;
|
||||
par = current->fs->pwd;
|
||||
/* TODO: take advantage of multiwalk */
|
||||
|
||||
fidnum = v9fs_get_idpool(&v9ses->fidpool);
|
||||
if (fidnum < 0) {
|
||||
dprintk(DEBUG_ERROR,
|
||||
"could not get a new fid num\n");
|
||||
return return_fid;
|
||||
}
|
||||
|
||||
while (par != dentry) {
|
||||
result =
|
||||
v9fs_t_walk(v9ses, oldfid, fidnum, "..",
|
||||
NULL);
|
||||
if (result < 0) {
|
||||
dprintk(DEBUG_ERROR,
|
||||
"problem walking to parent\n");
|
||||
|
||||
break;
|
||||
}
|
||||
oldfid = fidnum;
|
||||
if (par == par->d_parent) {
|
||||
dprintk(DEBUG_ERROR,
|
||||
"can't find dentry\n");
|
||||
break;
|
||||
}
|
||||
par = par->d_parent;
|
||||
}
|
||||
if (par == dentry) {
|
||||
return_fid = v9fs_fid_create(dentry);
|
||||
return_fid->fid = fidnum;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return return_fid;
|
||||
}
|
||||
57
fs/9p/fid.h
Normal file
57
fs/9p/fid.h
Normal file
@ -0,0 +1,57 @@
|
||||
/*
|
||||
* V9FS FID Management
|
||||
*
|
||||
* Copyright (C) 2005 by Eric Van Hensbergen <ericvh@gmail.com>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to:
|
||||
* Free Software Foundation
|
||||
* 51 Franklin Street, Fifth Floor
|
||||
* Boston, MA 02111-1301 USA
|
||||
*
|
||||
*/
|
||||
|
||||
#include <linux/list.h>
|
||||
|
||||
#define FID_OP 0
|
||||
#define FID_WALK 1
|
||||
|
||||
struct v9fs_fid {
|
||||
struct list_head list; /* list of fids associated with a dentry */
|
||||
struct list_head active; /* XXX - debug */
|
||||
|
||||
u32 fid;
|
||||
unsigned char fidopen; /* set when fid is opened */
|
||||
unsigned char fidcreate; /* set when fid was just created */
|
||||
unsigned char fidclunked; /* set when fid has already been clunked */
|
||||
|
||||
struct v9fs_qid qid;
|
||||
u32 iounit;
|
||||
|
||||
/* readdir stuff */
|
||||
int rdir_fpos;
|
||||
loff_t rdir_pos;
|
||||
struct v9fs_fcall *rdir_fcall;
|
||||
|
||||
/* management stuff */
|
||||
pid_t pid; /* thread associated with this fid */
|
||||
uid_t uid; /* user associated with this fid */
|
||||
|
||||
/* private data */
|
||||
struct file *filp; /* backpointer to File struct for open files */
|
||||
struct v9fs_session_info *v9ses; /* session info for this FID */
|
||||
};
|
||||
|
||||
struct v9fs_fid *v9fs_fid_lookup(struct dentry *dentry, int type);
|
||||
void v9fs_fid_destroy(struct v9fs_fid *fid);
|
||||
struct v9fs_fid *v9fs_fid_create(struct dentry *);
|
||||
Loading…
Reference in New Issue
Block a user