1 /* 2 * (C) 2001 Clemson University and The University of Chicago 3 * 4 * Changes by Acxiom Corporation to add proc file handler for pvfs2 client 5 * parameters, Copyright Acxiom Corporation, 2005. 6 * 7 * See COPYING in top-level directory. 8 */ 9 10 #include "protocol.h" 11 #include "orangefs-kernel.h" 12 #include "orangefs-debugfs.h" 13 #include "orangefs-sysfs.h" 14 15 /* ORANGEFS_VERSION is a ./configure define */ 16 #ifndef ORANGEFS_VERSION 17 #define ORANGEFS_VERSION "upstream" 18 #endif 19 20 /* 21 * global variables declared here 22 */ 23 24 /* array of client debug keyword/mask values */ 25 struct client_debug_mask *cdm_array; 26 int cdm_element_count; 27 28 char kernel_debug_string[ORANGEFS_MAX_DEBUG_STRING_LEN] = "none"; 29 char client_debug_string[ORANGEFS_MAX_DEBUG_STRING_LEN]; 30 char client_debug_array_string[ORANGEFS_MAX_DEBUG_STRING_LEN]; 31 32 char *debug_help_string; 33 int help_string_initialized; 34 struct dentry *help_file_dentry; 35 struct dentry *client_debug_dentry; 36 struct dentry *debug_dir; 37 int client_verbose_index; 38 int client_all_index; 39 struct orangefs_stats g_orangefs_stats; 40 41 /* the size of the hash tables for ops in progress */ 42 int hash_table_size = 509; 43 44 static ulong module_parm_debug_mask; 45 __u64 gossip_debug_mask; 46 struct client_debug_mask client_debug_mask = { NULL, 0, 0 }; 47 unsigned int kernel_mask_set_mod_init; /* implicitly false */ 48 int op_timeout_secs = ORANGEFS_DEFAULT_OP_TIMEOUT_SECS; 49 int slot_timeout_secs = ORANGEFS_DEFAULT_SLOT_TIMEOUT_SECS; 50 51 MODULE_LICENSE("GPL"); 52 MODULE_AUTHOR("ORANGEFS Development Team"); 53 MODULE_DESCRIPTION("The Linux Kernel VFS interface to ORANGEFS"); 54 MODULE_PARM_DESC(module_parm_debug_mask, "debugging level (see orangefs-debug.h for values)"); 55 MODULE_PARM_DESC(op_timeout_secs, "Operation timeout in seconds"); 56 MODULE_PARM_DESC(slot_timeout_secs, "Slot timeout in seconds"); 57 MODULE_PARM_DESC(hash_table_size, 58 "size of hash table for operations in progress"); 59 60 static struct file_system_type orangefs_fs_type = { 61 .name = "pvfs2", 62 .mount = orangefs_mount, 63 .kill_sb = orangefs_kill_sb, 64 .owner = THIS_MODULE, 65 }; 66 67 module_param(hash_table_size, int, 0); 68 module_param(module_parm_debug_mask, ulong, 0644); 69 module_param(op_timeout_secs, int, 0); 70 module_param(slot_timeout_secs, int, 0); 71 72 /* synchronizes the request device file */ 73 DEFINE_MUTEX(devreq_mutex); 74 75 /* 76 * Blocks non-priority requests from being queued for servicing. This 77 * could be used for protecting the request list data structure, but 78 * for now it's only being used to stall the op addition to the request 79 * list 80 */ 81 DEFINE_MUTEX(request_mutex); 82 83 /* hash table for storing operations waiting for matching downcall */ 84 struct list_head *htable_ops_in_progress; 85 DEFINE_SPINLOCK(htable_ops_in_progress_lock); 86 87 /* list for queueing upcall operations */ 88 LIST_HEAD(orangefs_request_list); 89 90 /* used to protect the above orangefs_request_list */ 91 DEFINE_SPINLOCK(orangefs_request_list_lock); 92 93 /* used for incoming request notification */ 94 DECLARE_WAIT_QUEUE_HEAD(orangefs_request_list_waitq); 95 96 static int __init orangefs_init(void) 97 { 98 int ret = -1; 99 __u32 i = 0; 100 101 /* convert input debug mask to a 64-bit unsigned integer */ 102 gossip_debug_mask = (unsigned long long) module_parm_debug_mask; 103 104 /* 105 * set the kernel's gossip debug string; invalid mask values will 106 * be ignored. 107 */ 108 debug_mask_to_string(&gossip_debug_mask, 0); 109 110 /* remove any invalid values from the mask */ 111 debug_string_to_mask(kernel_debug_string, &gossip_debug_mask, 0); 112 113 /* 114 * if the mask has a non-zero value, then indicate that the mask 115 * was set when the kernel module was loaded. The orangefs dev ioctl 116 * command will look at this boolean to determine if the kernel's 117 * debug mask should be overwritten when the client-core is started. 118 */ 119 if (gossip_debug_mask != 0) 120 kernel_mask_set_mod_init = true; 121 122 pr_info("%s: called with debug mask: :%s: :%llx:\n", 123 __func__, 124 kernel_debug_string, 125 (unsigned long long)gossip_debug_mask); 126 127 ret = bdi_init(&orangefs_backing_dev_info); 128 129 if (ret) 130 return ret; 131 132 if (op_timeout_secs < 0) 133 op_timeout_secs = 0; 134 135 if (slot_timeout_secs < 0) 136 slot_timeout_secs = 0; 137 138 /* initialize global book keeping data structures */ 139 ret = op_cache_initialize(); 140 if (ret < 0) 141 goto err; 142 143 ret = orangefs_inode_cache_initialize(); 144 if (ret < 0) 145 goto cleanup_op; 146 147 htable_ops_in_progress = 148 kcalloc(hash_table_size, sizeof(struct list_head), GFP_KERNEL); 149 if (!htable_ops_in_progress) { 150 gossip_err("Failed to initialize op hashtable"); 151 ret = -ENOMEM; 152 goto cleanup_inode; 153 } 154 155 /* initialize a doubly linked at each hash table index */ 156 for (i = 0; i < hash_table_size; i++) 157 INIT_LIST_HEAD(&htable_ops_in_progress[i]); 158 159 ret = fsid_key_table_initialize(); 160 if (ret < 0) 161 goto cleanup_progress_table; 162 163 /* 164 * Build the contents of /sys/kernel/debug/orangefs/debug-help 165 * from the keywords in the kernel keyword/mask array. 166 * 167 * The keywords in the client keyword/mask array are 168 * unknown at boot time. 169 * 170 * orangefs_prepare_debugfs_help_string will be used again 171 * later to rebuild the debug-help file after the client starts 172 * and passes along the needed info. The argument signifies 173 * which time orangefs_prepare_debugfs_help_string is being 174 * called. 175 */ 176 ret = orangefs_prepare_debugfs_help_string(1); 177 if (ret) 178 goto cleanup_key_table; 179 180 ret = orangefs_debugfs_init(); 181 if (ret) 182 goto debugfs_init_failed; 183 184 ret = orangefs_kernel_debug_init(); 185 if (ret) 186 goto kernel_debug_init_failed; 187 188 ret = orangefs_sysfs_init(); 189 if (ret) 190 goto sysfs_init_failed; 191 192 /* Initialize the orangefsdev subsystem. */ 193 ret = orangefs_dev_init(); 194 if (ret < 0) { 195 gossip_err("%s: could not initialize device subsystem %d!\n", 196 __func__, 197 ret); 198 goto cleanup_device; 199 } 200 201 ret = register_filesystem(&orangefs_fs_type); 202 if (ret == 0) { 203 pr_info("orangefs: module version %s loaded\n", ORANGEFS_VERSION); 204 ret = 0; 205 goto out; 206 } 207 208 orangefs_sysfs_exit(); 209 210 cleanup_device: 211 orangefs_dev_cleanup(); 212 213 sysfs_init_failed: 214 215 kernel_debug_init_failed: 216 217 debugfs_init_failed: 218 orangefs_debugfs_cleanup(); 219 220 cleanup_key_table: 221 fsid_key_table_finalize(); 222 223 cleanup_progress_table: 224 kfree(htable_ops_in_progress); 225 226 cleanup_inode: 227 orangefs_inode_cache_finalize(); 228 229 cleanup_op: 230 op_cache_finalize(); 231 232 err: 233 bdi_destroy(&orangefs_backing_dev_info); 234 235 out: 236 return ret; 237 } 238 239 static void __exit orangefs_exit(void) 240 { 241 int i = 0; 242 gossip_debug(GOSSIP_INIT_DEBUG, "orangefs: orangefs_exit called\n"); 243 244 unregister_filesystem(&orangefs_fs_type); 245 orangefs_debugfs_cleanup(); 246 orangefs_sysfs_exit(); 247 fsid_key_table_finalize(); 248 orangefs_dev_cleanup(); 249 BUG_ON(!list_empty(&orangefs_request_list)); 250 for (i = 0; i < hash_table_size; i++) 251 BUG_ON(!list_empty(&htable_ops_in_progress[i])); 252 253 orangefs_inode_cache_finalize(); 254 op_cache_finalize(); 255 256 kfree(htable_ops_in_progress); 257 258 bdi_destroy(&orangefs_backing_dev_info); 259 260 pr_info("orangefs: module version %s unloaded\n", ORANGEFS_VERSION); 261 } 262 263 /* 264 * What we do in this function is to walk the list of operations 265 * that are in progress in the hash table and mark them as purged as well. 266 */ 267 void purge_inprogress_ops(void) 268 { 269 int i; 270 271 for (i = 0; i < hash_table_size; i++) { 272 struct orangefs_kernel_op_s *op; 273 struct orangefs_kernel_op_s *next; 274 275 spin_lock(&htable_ops_in_progress_lock); 276 list_for_each_entry_safe(op, 277 next, 278 &htable_ops_in_progress[i], 279 list) { 280 set_op_state_purged(op); 281 gossip_debug(GOSSIP_DEV_DEBUG, 282 "%s: op:%s: op_state:%d: process:%s:\n", 283 __func__, 284 get_opname_string(op), 285 op->op_state, 286 current->comm); 287 } 288 spin_unlock(&htable_ops_in_progress_lock); 289 } 290 } 291 292 module_init(orangefs_init); 293 module_exit(orangefs_exit); 294