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 if (op_timeout_secs < 0) 84 op_timeout_secs = 0; 85 86 if (slot_timeout_secs < 0) 87 slot_timeout_secs = 0; 88 89 /* initialize global book keeping data structures */ 90 ret = op_cache_initialize(); 91 if (ret < 0) 92 goto out; 93 94 ret = orangefs_inode_cache_initialize(); 95 if (ret < 0) 96 goto cleanup_op; 97 98 orangefs_htable_ops_in_progress = 99 kcalloc(hash_table_size, sizeof(struct list_head), GFP_KERNEL); 100 if (!orangefs_htable_ops_in_progress) { 101 gossip_err("Failed to initialize op hashtable"); 102 ret = -ENOMEM; 103 goto cleanup_inode; 104 } 105 106 /* initialize a doubly linked at each hash table index */ 107 for (i = 0; i < hash_table_size; i++) 108 INIT_LIST_HEAD(&orangefs_htable_ops_in_progress[i]); 109 110 ret = fsid_key_table_initialize(); 111 if (ret < 0) 112 goto cleanup_progress_table; 113 114 /* 115 * Build the contents of /sys/kernel/debug/orangefs/debug-help 116 * from the keywords in the kernel keyword/mask array. 117 * 118 * The keywords in the client keyword/mask array are 119 * unknown at boot time. 120 * 121 * orangefs_prepare_debugfs_help_string will be used again 122 * later to rebuild the debug-help-string after the client starts 123 * and passes along the needed info. The argument signifies 124 * which time orangefs_prepare_debugfs_help_string is being 125 * called. 126 */ 127 ret = orangefs_prepare_debugfs_help_string(1); 128 if (ret) 129 goto cleanup_key_table; 130 131 ret = orangefs_debugfs_init(module_parm_debug_mask); 132 if (ret) 133 goto debugfs_init_failed; 134 135 ret = orangefs_sysfs_init(); 136 if (ret) 137 goto sysfs_init_failed; 138 139 /* Initialize the orangefsdev subsystem. */ 140 ret = orangefs_dev_init(); 141 if (ret < 0) { 142 gossip_err("%s: could not initialize device subsystem %d!\n", 143 __func__, 144 ret); 145 goto cleanup_device; 146 } 147 148 ret = register_filesystem(&orangefs_fs_type); 149 if (ret == 0) { 150 pr_info("%s: module version %s loaded\n", 151 __func__, 152 ORANGEFS_VERSION); 153 ret = 0; 154 goto out; 155 } 156 157 orangefs_sysfs_exit(); 158 159 cleanup_device: 160 orangefs_dev_cleanup(); 161 162 sysfs_init_failed: 163 164 debugfs_init_failed: 165 orangefs_debugfs_cleanup(); 166 167 cleanup_key_table: 168 fsid_key_table_finalize(); 169 170 cleanup_progress_table: 171 kfree(orangefs_htable_ops_in_progress); 172 173 cleanup_inode: 174 orangefs_inode_cache_finalize(); 175 176 cleanup_op: 177 op_cache_finalize(); 178 179 out: 180 return ret; 181 } 182 183 static void __exit orangefs_exit(void) 184 { 185 int i = 0; 186 gossip_debug(GOSSIP_INIT_DEBUG, "orangefs: orangefs_exit called\n"); 187 188 unregister_filesystem(&orangefs_fs_type); 189 orangefs_debugfs_cleanup(); 190 orangefs_sysfs_exit(); 191 fsid_key_table_finalize(); 192 orangefs_dev_cleanup(); 193 BUG_ON(!list_empty(&orangefs_request_list)); 194 for (i = 0; i < hash_table_size; i++) 195 BUG_ON(!list_empty(&orangefs_htable_ops_in_progress[i])); 196 197 orangefs_inode_cache_finalize(); 198 op_cache_finalize(); 199 200 kfree(orangefs_htable_ops_in_progress); 201 202 pr_info("orangefs: module version %s unloaded\n", ORANGEFS_VERSION); 203 } 204 205 /* 206 * What we do in this function is to walk the list of operations 207 * that are in progress in the hash table and mark them as purged as well. 208 */ 209 void purge_inprogress_ops(void) 210 { 211 int i; 212 213 for (i = 0; i < hash_table_size; i++) { 214 struct orangefs_kernel_op_s *op; 215 struct orangefs_kernel_op_s *next; 216 217 spin_lock(&orangefs_htable_ops_in_progress_lock); 218 list_for_each_entry_safe(op, 219 next, 220 &orangefs_htable_ops_in_progress[i], 221 list) { 222 set_op_state_purged(op); 223 gossip_debug(GOSSIP_DEV_DEBUG, 224 "%s: op:%s: op_state:%d: process:%s:\n", 225 __func__, 226 get_opname_string(op), 227 op->op_state, 228 current->comm); 229 } 230 spin_unlock(&orangefs_htable_ops_in_progress_lock); 231 } 232 } 233 234 module_init(orangefs_init); 235 module_exit(orangefs_exit); 236