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 struct orangefs_stats orangefs_stats; 25 26 /* the size of the hash tables for ops in progress */ 27 int hash_table_size = 509; 28 29 static ulong module_parm_debug_mask; 30 __u64 orangefs_gossip_debug_mask; 31 int op_timeout_secs = ORANGEFS_DEFAULT_OP_TIMEOUT_SECS; 32 int slot_timeout_secs = ORANGEFS_DEFAULT_SLOT_TIMEOUT_SECS; 33 int orangefs_dcache_timeout_msecs = 50; 34 int orangefs_getattr_timeout_msecs = 50; 35 36 MODULE_LICENSE("GPL"); 37 MODULE_AUTHOR("ORANGEFS Development Team"); 38 MODULE_DESCRIPTION("The Linux Kernel VFS interface to ORANGEFS"); 39 MODULE_PARM_DESC(module_parm_debug_mask, "debugging level (see orangefs-debug.h for values)"); 40 MODULE_PARM_DESC(op_timeout_secs, "Operation timeout in seconds"); 41 MODULE_PARM_DESC(slot_timeout_secs, "Slot timeout in seconds"); 42 MODULE_PARM_DESC(hash_table_size, 43 "size of hash table for operations in progress"); 44 45 static struct file_system_type orangefs_fs_type = { 46 .name = "pvfs2", 47 .mount = orangefs_mount, 48 .kill_sb = orangefs_kill_sb, 49 .owner = THIS_MODULE, 50 }; 51 52 module_param(hash_table_size, int, 0); 53 module_param(module_parm_debug_mask, ulong, 0644); 54 module_param(op_timeout_secs, int, 0); 55 module_param(slot_timeout_secs, int, 0); 56 57 /* 58 * Blocks non-priority requests from being queued for servicing. This 59 * could be used for protecting the request list data structure, but 60 * for now it's only being used to stall the op addition to the request 61 * list 62 */ 63 DEFINE_MUTEX(orangefs_request_mutex); 64 65 /* hash table for storing operations waiting for matching downcall */ 66 struct list_head *orangefs_htable_ops_in_progress; 67 DEFINE_SPINLOCK(orangefs_htable_ops_in_progress_lock); 68 69 /* list for queueing upcall operations */ 70 LIST_HEAD(orangefs_request_list); 71 72 /* used to protect the above orangefs_request_list */ 73 DEFINE_SPINLOCK(orangefs_request_list_lock); 74 75 /* used for incoming request notification */ 76 DECLARE_WAIT_QUEUE_HEAD(orangefs_request_list_waitq); 77 78 static int __init orangefs_init(void) 79 { 80 int ret = -1; 81 __u32 i = 0; 82 83 ret = bdi_init(&orangefs_backing_dev_info); 84 85 if (ret) 86 return ret; 87 88 if (op_timeout_secs < 0) 89 op_timeout_secs = 0; 90 91 if (slot_timeout_secs < 0) 92 slot_timeout_secs = 0; 93 94 /* initialize global book keeping data structures */ 95 ret = op_cache_initialize(); 96 if (ret < 0) 97 goto err; 98 99 ret = orangefs_inode_cache_initialize(); 100 if (ret < 0) 101 goto cleanup_op; 102 103 orangefs_htable_ops_in_progress = 104 kcalloc(hash_table_size, sizeof(struct list_head), GFP_KERNEL); 105 if (!orangefs_htable_ops_in_progress) { 106 gossip_err("Failed to initialize op hashtable"); 107 ret = -ENOMEM; 108 goto cleanup_inode; 109 } 110 111 /* initialize a doubly linked at each hash table index */ 112 for (i = 0; i < hash_table_size; i++) 113 INIT_LIST_HEAD(&orangefs_htable_ops_in_progress[i]); 114 115 ret = fsid_key_table_initialize(); 116 if (ret < 0) 117 goto cleanup_progress_table; 118 119 /* 120 * Build the contents of /sys/kernel/debug/orangefs/debug-help 121 * from the keywords in the kernel keyword/mask array. 122 * 123 * The keywords in the client keyword/mask array are 124 * unknown at boot time. 125 * 126 * orangefs_prepare_debugfs_help_string will be used again 127 * later to rebuild the debug-help file after the client starts 128 * and passes along the needed info. The argument signifies 129 * which time orangefs_prepare_debugfs_help_string is being 130 * called. 131 */ 132 ret = orangefs_prepare_debugfs_help_string(1); 133 if (ret) 134 goto cleanup_key_table; 135 136 ret = orangefs_debugfs_init(module_parm_debug_mask); 137 if (ret) 138 goto debugfs_init_failed; 139 140 ret = orangefs_sysfs_init(); 141 if (ret) 142 goto sysfs_init_failed; 143 144 /* Initialize the orangefsdev subsystem. */ 145 ret = orangefs_dev_init(); 146 if (ret < 0) { 147 gossip_err("%s: could not initialize device subsystem %d!\n", 148 __func__, 149 ret); 150 goto cleanup_device; 151 } 152 153 ret = register_filesystem(&orangefs_fs_type); 154 if (ret == 0) { 155 pr_info("orangefs: module version %s loaded\n", ORANGEFS_VERSION); 156 ret = 0; 157 goto out; 158 } 159 160 orangefs_sysfs_exit(); 161 162 cleanup_device: 163 orangefs_dev_cleanup(); 164 165 sysfs_init_failed: 166 167 debugfs_init_failed: 168 orangefs_debugfs_cleanup(); 169 170 cleanup_key_table: 171 fsid_key_table_finalize(); 172 173 cleanup_progress_table: 174 kfree(orangefs_htable_ops_in_progress); 175 176 cleanup_inode: 177 orangefs_inode_cache_finalize(); 178 179 cleanup_op: 180 op_cache_finalize(); 181 182 err: 183 bdi_destroy(&orangefs_backing_dev_info); 184 185 out: 186 return ret; 187 } 188 189 static void __exit orangefs_exit(void) 190 { 191 int i = 0; 192 gossip_debug(GOSSIP_INIT_DEBUG, "orangefs: orangefs_exit called\n"); 193 194 unregister_filesystem(&orangefs_fs_type); 195 orangefs_debugfs_cleanup(); 196 orangefs_sysfs_exit(); 197 fsid_key_table_finalize(); 198 orangefs_dev_cleanup(); 199 BUG_ON(!list_empty(&orangefs_request_list)); 200 for (i = 0; i < hash_table_size; i++) 201 BUG_ON(!list_empty(&orangefs_htable_ops_in_progress[i])); 202 203 orangefs_inode_cache_finalize(); 204 op_cache_finalize(); 205 206 kfree(orangefs_htable_ops_in_progress); 207 208 bdi_destroy(&orangefs_backing_dev_info); 209 210 pr_info("orangefs: module version %s unloaded\n", ORANGEFS_VERSION); 211 } 212 213 /* 214 * What we do in this function is to walk the list of operations 215 * that are in progress in the hash table and mark them as purged as well. 216 */ 217 void purge_inprogress_ops(void) 218 { 219 int i; 220 221 for (i = 0; i < hash_table_size; i++) { 222 struct orangefs_kernel_op_s *op; 223 struct orangefs_kernel_op_s *next; 224 225 spin_lock(&orangefs_htable_ops_in_progress_lock); 226 list_for_each_entry_safe(op, 227 next, 228 &orangefs_htable_ops_in_progress[i], 229 list) { 230 set_op_state_purged(op); 231 gossip_debug(GOSSIP_DEV_DEBUG, 232 "%s: op:%s: op_state:%d: process:%s:\n", 233 __func__, 234 get_opname_string(op), 235 op->op_state, 236 current->comm); 237 } 238 spin_unlock(&orangefs_htable_ops_in_progress_lock); 239 } 240 } 241 242 module_init(orangefs_init); 243 module_exit(orangefs_exit); 244