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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 | /* * debug.c - NTFS kernel debug support. Part of the Linux-NTFS project. * * Copyright (c) 2001-2004 Anton Altaparmakov * * This program/include file 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/include file 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 (in the main directory of the Linux-NTFS * distribution in the file COPYING); if not, write to the Free Software * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include "debug.h" /* * A static buffer to hold the error string being displayed and a spinlock * to protect concurrent accesses to it. */ static char err_buf[1024]; static DEFINE_SPINLOCK(err_buf_lock); /** * __ntfs_warning - output a warning to the syslog * @function: name of function outputting the warning * @sb: super block of mounted ntfs filesystem * @fmt: warning string containing format specifications * @...: a variable number of arguments specified in @fmt * * Outputs a warning to the syslog for the mounted ntfs filesystem described * by @sb. * * @fmt and the corresponding @... is printf style format string containing * the warning string and the corresponding format arguments, respectively. * * @function is the name of the function from which __ntfs_warning is being * called. * * Note, you should be using debug.h::ntfs_warning(@sb, @fmt, @...) instead * as this provides the @function parameter automatically. */ void __ntfs_warning(const char *function, const struct super_block *sb, const char *fmt, ...) { va_list args; int flen = 0; #ifndef DEBUG if (!printk_ratelimit()) return; #endif if (function) flen = strlen(function); spin_lock(&err_buf_lock); va_start(args, fmt); vsnprintf(err_buf, sizeof(err_buf), fmt, args); va_end(args); if (sb) printk(KERN_ERR "NTFS-fs warning (device %s): %s(): %s\n", sb->s_id, flen ? function : "", err_buf); else printk(KERN_ERR "NTFS-fs warning: %s(): %s\n", flen ? function : "", err_buf); spin_unlock(&err_buf_lock); } /** * __ntfs_error - output an error to the syslog * @function: name of function outputting the error * @sb: super block of mounted ntfs filesystem * @fmt: error string containing format specifications * @...: a variable number of arguments specified in @fmt * * Outputs an error to the syslog for the mounted ntfs filesystem described * by @sb. * * @fmt and the corresponding @... is printf style format string containing * the error string and the corresponding format arguments, respectively. * * @function is the name of the function from which __ntfs_error is being * called. * * Note, you should be using debug.h::ntfs_error(@sb, @fmt, @...) instead * as this provides the @function parameter automatically. */ void __ntfs_error(const char *function, const struct super_block *sb, const char *fmt, ...) { va_list args; int flen = 0; #ifndef DEBUG if (!printk_ratelimit()) return; #endif if (function) flen = strlen(function); spin_lock(&err_buf_lock); va_start(args, fmt); vsnprintf(err_buf, sizeof(err_buf), fmt, args); va_end(args); if (sb) printk(KERN_ERR "NTFS-fs error (device %s): %s(): %s\n", sb->s_id, flen ? function : "", err_buf); else printk(KERN_ERR "NTFS-fs error: %s(): %s\n", flen ? function : "", err_buf); spin_unlock(&err_buf_lock); } #ifdef DEBUG /* If 1, output debug messages, and if 0, don't. */ int debug_msgs = 0; void __ntfs_debug (const char *file, int line, const char *function, const char *fmt, ...) { va_list args; int flen = 0; if (!debug_msgs) return; if (function) flen = strlen(function); spin_lock(&err_buf_lock); va_start(args, fmt); vsnprintf(err_buf, sizeof(err_buf), fmt, args); va_end(args); printk(KERN_DEBUG "NTFS-fs DEBUG (%s, %d): %s(): %s\n", file, line, flen ? function : "", err_buf); spin_unlock(&err_buf_lock); } /* Dump a runlist. Caller has to provide synchronisation for @rl. */ void ntfs_debug_dump_runlist(const runlist_element *rl) { int i; const char *lcn_str[5] = { "LCN_HOLE ", "LCN_RL_NOT_MAPPED", "LCN_ENOENT ", "LCN_unknown " }; if (!debug_msgs) return; printk(KERN_DEBUG "NTFS-fs DEBUG: Dumping runlist (values in hex):\n"); if (!rl) { printk(KERN_DEBUG "Run list not present.\n"); return; } printk(KERN_DEBUG "VCN LCN Run length\n"); for (i = 0; ; i++) { LCN lcn = (rl + i)->lcn; if (lcn < (LCN)0) { int index = -lcn - 1; if (index > -LCN_ENOENT - 1) index = 3; printk(KERN_DEBUG "%-16Lx %s %-16Lx%s\n", (long long)(rl + i)->vcn, lcn_str[index], (long long)(rl + i)->length, (rl + i)->length ? "" : " (runlist end)"); } else printk(KERN_DEBUG "%-16Lx %-16Lx %-16Lx%s\n", (long long)(rl + i)->vcn, (long long)(rl + i)->lcn, (long long)(rl + i)->length, (rl + i)->length ? "" : " (runlist end)"); if (!(rl + i)->length) break; } } #endif |