author | Jiri Sasek <jurasek@opensolaris.org> |
Wed, 25 May 2011 18:33:43 +0200 | |
changeset 264 | 84a67a54e8fd |
child 628 | c3c0c8f3f696 |
permissions | -rw-r--r-- |
264
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--- source3/modules/vfs_samfs.c 2010-07-07 10:22:33.756895700 -0700 |
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+++ source3/modules/vfs_samfs.c 2010-07-07 07:13:55.603441200 -0700 |
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@@ -0,0 +1,172 @@ |
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+/* |
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+ * Support for offline files with Sun SAM-QFS |
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+ * |
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+ * Copyright (C) Dirk Nitschke, 2009 |
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+ * |
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+ * Modified by Jiri Sasek, 2010 |
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+ * To conform the samba-vfs api |
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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 3 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, see <http://www.gnu.org/licenses/>. |
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+ * |
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+ */ |
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+ |
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+#include "includes.h" |
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+/* |
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+ * Include files for Sun SAM-QFS |
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+ * |
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+ */ |
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+#include <pub/stat.h> |
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+#include <pub/lib.h> |
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+ |
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+#undef DBGC_CLASS |
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+#define DBGC_CLASS DBGC_VFS |
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+ |
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+#define SAMFS_MODULE_NAME "samfs" |
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+ |
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+NTSTATUS vfs_samfs_init(void); |
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+ |
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+/* |
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+ * samfs_is_offline() |
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+ * check if the local file is offline in the sense of SAM-QFS |
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+ * |
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+ * A segmented file is offline if the file's index inode is |
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+ * offline or at least one of it's segments is offline. |
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+ * |
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+ * See sam_stat(3) and sam_segment_stat(3) for details. |
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+ * |
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+ * If something goes wrong we assume that the file is offline. |
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+ */ |
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+static bool samfs_is_offline(struct vfs_handle_struct *handle, const char *path, SMB_STRUCT_STAT *sbuf) |
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+{ |
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+ struct sam_stat file_info; |
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+ struct sam_stat *seg_info_ptr; |
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+ bool offline; |
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+ int number_of_segments; |
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+ int result; |
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+ int i; |
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+ |
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+ offline = false; |
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+ if (ISDOT(path) || ISDOTDOT(path)) { |
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+ return false; |
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+ } |
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+ |
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+ /* |
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+ * Initialize file_info to be all zero bits |
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+ */ |
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+ memset((void *)&file_info, 0, sizeof(struct sam_stat)); |
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+ |
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+ /* |
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+ * Stat the file using the regular sam_stat function |
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+ */ |
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+ result = sam_stat(path, &file_info, sizeof(struct sam_stat)); |
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+ |
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+ if (result != 0) { |
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+ DEBUG(10,("samfs_is_offline: cannot sam_stat %s, %s\nAssuming file is offline.\n", \ |
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+ path, strerror(errno))); |
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+ return true; |
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+ } |
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+ |
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+ /* |
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+ * Check if file is offline |
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+ */ |
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+ if (SS_ISOFFLINE(file_info.attr)) { |
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+ DEBUG(10,("samfs_is_offline: file %s is offline.\n", path)); |
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+ return true; |
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+ } |
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+ |
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+ /* |
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+ * Check for segmented file |
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+ */ |
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+ if (SS_ISSEGMENT_F(file_info.attr)) { |
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+ number_of_segments = NUM_SEGS(&file_info); |
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+ seg_info_ptr = (struct sam_stat *)malloc(number_of_segments * |
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+ sizeof(struct sam_stat)); |
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+ if (seg_info_ptr != NULL) { |
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+ /* |
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+ * Initialize seg_info_ptr to be all zero bits |
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+ */ |
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+ memset((void *)seg_info_ptr, 0, number_of_segments * |
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+ sizeof(struct sam_stat)); |
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+ /* |
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+ * Stat all segments |
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+ */ |
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+ result = sam_segment_stat(path, seg_info_ptr, |
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+ number_of_segments * sizeof(struct sam_stat)); |
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+ if (result != 0) { |
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110 |
+ DEBUG(10,("samfs_is_offline: cannot sam_segment_stat %s, %s\nAssuming file is offline.\n", \ |
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111 |
+ path, strerror(errno))); |
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112 |
+ offline = true; |
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113 |
+ } |
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114 |
+ /* |
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115 |
+ * Loop over segments until we have checked all segments |
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116 |
+ * or found one which is offline. |
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117 |
+ */ |
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118 |
+ i = 0; |
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119 |
+ while (!offline && (i < number_of_segments)) { |
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120 |
+ if (SS_ISOFFLINE(seg_info_ptr[i].attr)) { |
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121 |
+ DEBUG(10,("samfs_is_offline: file %s has offline segment %d\n", \ |
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122 |
+ path, i+1)); |
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123 |
+ offline = true; |
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124 |
+ } |
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125 |
+ i++; |
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126 |
+ } |
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127 |
+ SAFE_FREE(seg_info_ptr); |
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128 |
+ } else { |
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129 |
+ DEBUG(10,("samfs_is_offline: cannot malloc for segment stat info %s\nAssuming file is offline.\n", \ |
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130 |
+ path)); |
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131 |
+ offline = true; |
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132 |
+ } |
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133 |
+ |
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134 |
+ } |
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135 |
+ return offline; |
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136 |
+} |
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137 |
+ |
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138 |
+/* |
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139 |
+ * release a file-command to SAM-stagger |
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140 |
+ */ |
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141 |
+extern int sam_release(const char *path, const char *command); |
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142 |
+ |
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143 |
+/* |
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144 |
+ * samfs_set_offline() |
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145 |
+ * |
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146 |
+ * Release the local file in the sense of SAM-QFS. |
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147 |
+ * See sam_release(3) for details. |
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148 |
+ * |
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149 |
+ */ |
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150 |
+static int samfs_set_offline(struct vfs_handle_struct *handle, const char *path) |
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151 |
+{ |
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152 |
+ int result; |
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153 |
+ |
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154 |
+ result = sam_release(path, "i"); |
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155 |
+ if (result != 0) { |
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156 |
+ DEBUG(10,("samfs_set_offline: sam_release %s returned %s\n", \ |
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157 |
+ path, strerror(errno))); |
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158 |
+ return -1; |
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159 |
+ } |
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160 |
+ return 0; |
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161 |
+} |
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162 |
+ |
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163 |
+/* VFS operations structure */ |
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164 |
+ |
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165 |
+static struct vfs_fn_pointers samfs_fns = { |
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166 |
+ .is_offline = samfs_is_offline, |
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167 |
+ .set_offline = samfs_set_offline |
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168 |
+}; |
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169 |
+ |
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170 |
+NTSTATUS vfs_samfs_init(void); |
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171 |
+NTSTATUS vfs_samfs_init(void) |
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172 |
+{ |
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173 |
+ return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, SAMFS_MODULE_NAME, |
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174 |
+ &samfs_fns); |
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175 |
+} |