1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * (C) 2001 Clemson University and The University of Chicago 4 * 5 * Changes by Acxiom Corporation to add proc file handler for pvfs2 client 6 * parameters, Copyright Acxiom Corporation, 2005. 7 * 8 * See COPYING in top-level directory. 9 */ 10 11 #include "protocol.h" 12 #include "orangefs-kernel.h" 13 #include "orangefs-debugfs.h" 14 #include "orangefs-sysfs.h" 15 16 /* ORANGEFS_VERSION is a ./configure define */ 17 #ifndef ORANGEFS_VERSION 18 #define ORANGEFS_VERSION "upstream" 19 #endif 20 21 /* 22 * global variables declared here 23 */ 24 25 struct orangefs_stats orangefs_stats; 26 27 /* the size of the hash tables for ops in progress */ 28 int hash_table_size = 509; 29 30 static ulong module_parm_debug_mask; 31 __u64 orangefs_gossip_debug_mask; 32 int op_timeout_secs = ORANGEFS_DEFAULT_OP_TIMEOUT_SECS; 33 int slot_timeout_secs = ORANGEFS_DEFAULT_SLOT_TIMEOUT_SECS; 34 int orangefs_cache_timeout_msecs = 500; 35 int orangefs_dcache_timeout_msecs = 50; 36 int orangefs_getattr_timeout_msecs = 50; 37 38 MODULE_LICENSE("GPL"); 39 MODULE_AUTHOR("ORANGEFS Development Team"); 40 MODULE_DESCRIPTION("The Linux Kernel VFS interface to ORANGEFS"); 41 MODULE_PARM_DESC(module_parm_debug_mask, "debugging level (see orangefs-debug.h for values)"); 42 MODULE_PARM_DESC(op_timeout_secs, "Operation timeout in seconds"); 43 MODULE_PARM_DESC(slot_timeout_secs, "Slot timeout in seconds"); 44 MODULE_PARM_DESC(hash_table_size, 45 "size of hash table for operations in progress"); 46 47 static struct file_system_type orangefs_fs_type = { 48 .name = "pvfs2", 49 .mount = orangefs_mount, 50 .kill_sb = orangefs_kill_sb, 51 .owner = THIS_MODULE, 52 }; 53 54 module_param(hash_table_size, int, 0); 55 module_param(module_parm_debug_mask, ulong, 0644); 56 module_param(op_timeout_secs, int, 0); 57 module_param(slot_timeout_secs, int, 0); 58 59 /* 60 * Blocks non-priority requests from being queued for servicing. This 61 * could be used for protecting the request list data structure, but 62 * for now it's only being used to stall the op addition to the request 63 * list 64 */ 65 DEFINE_MUTEX(orangefs_request_mutex); 66 67 /* hash table for storing operations waiting for matching downcall */ 68 struct list_head *orangefs_htable_ops_in_progress; 69 DEFINE_SPINLOCK(orangefs_htable_ops_in_progress_lock); 70 71 /* list for queueing upcall operations */ 72 LIST_HEAD(orangefs_request_list); 73 74 /* used to protect the above orangefs_request_list */ 75 DEFINE_SPINLOCK(orangefs_request_list_lock); 76 77 /* used for incoming request notification */ 78 DECLARE_WAIT_QUEUE_HEAD(orangefs_request_list_waitq); 79 80 static int __init orangefs_init(void) 81 { 82 int ret; 83 __u32 i = 0; 84 85 if (op_timeout_secs < 0) 86 op_timeout_secs = 0; 87 88 if (slot_timeout_secs < 0) 89 slot_timeout_secs = 0; 90 91 /* initialize global book keeping data structures */ 92 ret = op_cache_initialize(); 93 if (ret < 0) 94 goto out; 95 96 ret = orangefs_inode_cache_initialize(); 97 if (ret < 0) 98 goto cleanup_op; 99 100 orangefs_htable_ops_in_progress = 101 kcalloc(hash_table_size, sizeof(struct list_head), GFP_KERNEL); 102 if (!orangefs_htable_ops_in_progress) { 103 ret = -ENOMEM; 104 goto cleanup_inode; 105 } 106 107 /* initialize a doubly linked at each hash table index */ 108 for (i = 0; i < hash_table_size; i++) 109 INIT_LIST_HEAD(&orangefs_htable_ops_in_progress[i]); 110 111 ret = fsid_key_table_initialize(); 112 if (ret < 0) 113 goto cleanup_progress_table; 114 115 /* 116 * Build the contents of /sys/kernel/debug/orangefs/debug-help 117 * from the keywords in the kernel keyword/mask array. 118 * 119 * The keywords in the client keyword/mask array are 120 * unknown at boot time. 121 * 122 * orangefs_prepare_debugfs_help_string will be used again 123 * later to rebuild the debug-help-string after the client starts 124 * and passes along the needed info. The argument signifies 125 * which time orangefs_prepare_debugfs_help_string is being 126 * called. 127 */ 128 ret = orangefs_prepare_debugfs_help_string(1); 129 if (ret) 130 goto cleanup_key_table; 131 132 orangefs_debugfs_init(module_parm_debug_mask); 133 134 ret = orangefs_sysfs_init(); 135 if (ret) 136 goto sysfs_init_failed; 137 138 /* Initialize the orangefsdev subsystem. */ 139 ret = orangefs_dev_init(); 140 if (ret < 0) { 141 gossip_err("%s: could not initialize device subsystem %d!\n", 142 __func__, 143 ret); 144 goto cleanup_device; 145 } 146 147 ret = register_filesystem(&orangefs_fs_type); 148 if (ret == 0) { 149 pr_info("%s: module version %s loaded\n", 150 __func__, 151 ORANGEFS_VERSION); 152 goto out; 153 } 154 155 orangefs_sysfs_exit(); 156 157 cleanup_device: 158 orangefs_dev_cleanup(); 159 160 sysfs_init_failed: 161 orangefs_debugfs_cleanup(); 162 163 cleanup_key_table: 164 fsid_key_table_finalize(); 165 166 cleanup_progress_table: 167 kfree(orangefs_htable_ops_in_progress); 168 169 cleanup_inode: 170 orangefs_inode_cache_finalize(); 171 172 cleanup_op: 173 op_cache_finalize(); 174 175 out: 176 return ret; 177 } 178 179 static void __exit orangefs_exit(void) 180 { 181 int i = 0; 182 gossip_debug(GOSSIP_INIT_DEBUG, "orangefs: orangefs_exit called\n"); 183 184 unregister_filesystem(&orangefs_fs_type); 185 orangefs_debugfs_cleanup(); 186 orangefs_sysfs_exit(); 187 fsid_key_table_finalize(); 188 orangefs_dev_cleanup(); 189 BUG_ON(!list_empty(&orangefs_request_list)); 190 for (i = 0; i < hash_table_size; i++) 191 BUG_ON(!list_empty(&orangefs_htable_ops_in_progress[i])); 192 193 orangefs_inode_cache_finalize(); 194 op_cache_finalize(); 195 196 kfree(orangefs_htable_ops_in_progress); 197 198 pr_info("orangefs: module version %s unloaded\n", ORANGEFS_VERSION); 199 } 200 201 /* 202 * What we do in this function is to walk the list of operations 203 * that are in progress in the hash table and mark them as purged as well. 204 */ 205 void purge_inprogress_ops(void) 206 { 207 int i; 208 209 for (i = 0; i < hash_table_size; i++) { 210 struct orangefs_kernel_op_s *op; 211 struct orangefs_kernel_op_s *next; 212 213 spin_lock(&orangefs_htable_ops_in_progress_lock); 214 list_for_each_entry_safe(op, 215 next, 216 &orangefs_htable_ops_in_progress[i], 217 list) { 218 set_op_state_purged(op); 219 gossip_debug(GOSSIP_DEV_DEBUG, 220 "%s: op:%s: op_state:%d: process:%s:\n", 221 __func__, 222 get_opname_string(op), 223 op->op_state, 224 current->comm); 225 } 226 spin_unlock(&orangefs_htable_ops_in_progress_lock); 227 } 228 } 229 230 module_init(orangefs_init); 231 module_exit(orangefs_exit); 232