fs/orangefs/orangefs-mod.c

   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 int dcache_timeout_msecs = 50;
  51 int getattr_timeout_msecs = 50;
  52
  53 MODULE_LICENSE("GPL");
  54 MODULE_AUTHOR("ORANGEFS Development Team");
  55 MODULE_DESCRIPTION("The Linux Kernel VFS interface to ORANGEFS");
  56 MODULE_PARM_DESC(module_parm_debug_mask, "debugging level (see orangefs-debug.h for values)");
  57 MODULE_PARM_DESC(op_timeout_secs, "Operation timeout in seconds");
  58 MODULE_PARM_DESC(slot_timeout_secs, "Slot timeout in seconds");
  59 MODULE_PARM_DESC(hash_table_size,
  60                  "size of hash table for operations in progress");
  61
  62 static struct file_system_type orangefs_fs_type = {
  63         .name = "pvfs2",
  64         .mount = orangefs_mount,
  65         .kill_sb = orangefs_kill_sb,
  66         .owner = THIS_MODULE,
  67 };
  68
  69 module_param(hash_table_size, int, 0);
  70 module_param(module_parm_debug_mask, ulong, 0644);
  71 module_param(op_timeout_secs, int, 0);
  72 module_param(slot_timeout_secs, int, 0);
  73
  74 /* synchronizes the request device file */
  75 DEFINE_MUTEX(devreq_mutex);
  76
  77 /*
  78  * Blocks non-priority requests from being queued for servicing.  This
  79  * could be used for protecting the request list data structure, but
  80  * for now it's only being used to stall the op addition to the request
  81  * list
  82  */
  83 DEFINE_MUTEX(request_mutex);
  84
  85 /* hash table for storing operations waiting for matching downcall */
  86 struct list_head *htable_ops_in_progress;
  87 DEFINE_SPINLOCK(htable_ops_in_progress_lock);
  88
  89 /* list for queueing upcall operations */
  90 LIST_HEAD(orangefs_request_list);
  91
  92 /* used to protect the above orangefs_request_list */
  93 DEFINE_SPINLOCK(orangefs_request_list_lock);
  94
  95 /* used for incoming request notification */
  96 DECLARE_WAIT_QUEUE_HEAD(orangefs_request_list_waitq);
  97
  98 static int __init orangefs_init(void)
  99 {
 100         int ret = -1;
 101         __u32 i = 0;
 102
 103         /* convert input debug mask to a 64-bit unsigned integer */
 104         gossip_debug_mask = (unsigned long long) module_parm_debug_mask;
 105
 106         /*
 107          * set the kernel's gossip debug string; invalid mask values will
 108          * be ignored.
 109          */
 110         debug_mask_to_string(&gossip_debug_mask, 0);
 111
 112         /* remove any invalid values from the mask */
 113         debug_string_to_mask(kernel_debug_string, &gossip_debug_mask, 0);
 114
 115         /*
 116          * if the mask has a non-zero value, then indicate that the mask
 117          * was set when the kernel module was loaded.  The orangefs dev ioctl
 118          * command will look at this boolean to determine if the kernel's
 119          * debug mask should be overwritten when the client-core is started.
 120          */
 121         if (gossip_debug_mask != 0)
 122                 kernel_mask_set_mod_init = true;
 123
 124         pr_info("%s: called with debug mask: :%s: :%llx:\n",
 125                 __func__,
 126                 kernel_debug_string,
 127                 (unsigned long long)gossip_debug_mask);
 128
 129         ret = bdi_init(&orangefs_backing_dev_info);
 130
 131         if (ret)
 132                 return ret;
 133
 134         if (op_timeout_secs < 0)
 135                 op_timeout_secs = 0;
 136
 137         if (slot_timeout_secs < 0)
 138                 slot_timeout_secs = 0;
 139
 140         /* initialize global book keeping data structures */
 141         ret = op_cache_initialize();
 142         if (ret < 0)
 143                 goto err;
 144
 145         ret = orangefs_inode_cache_initialize();
 146         if (ret < 0)
 147                 goto cleanup_op;
 148
 149         htable_ops_in_progress =
 150             kcalloc(hash_table_size, sizeof(struct list_head), GFP_KERNEL);
 151         if (!htable_ops_in_progress) {
 152                 gossip_err("Failed to initialize op hashtable");
 153                 ret = -ENOMEM;
 154                 goto cleanup_inode;
 155         }
 156
 157         /* initialize a doubly linked at each hash table index */
 158         for (i = 0; i < hash_table_size; i++)
 159                 INIT_LIST_HEAD(&htable_ops_in_progress[i]);
 160
 161         ret = fsid_key_table_initialize();
 162         if (ret < 0)
 163                 goto cleanup_progress_table;
 164
 165         /*
 166          * Build the contents of /sys/kernel/debug/orangefs/debug-help
 167          * from the keywords in the kernel keyword/mask array.
 168          *
 169          * The keywords in the client keyword/mask array are
 170          * unknown at boot time.
 171          *
 172          * orangefs_prepare_debugfs_help_string will be used again
 173          * later to rebuild the debug-help file after the client starts
 174          * and passes along the needed info. The argument signifies
 175          * which time orangefs_prepare_debugfs_help_string is being
 176          * called.
 177          */
 178         ret = orangefs_prepare_debugfs_help_string(1);
 179         if (ret)
 180                 goto cleanup_key_table;
 181
 182         ret = orangefs_debugfs_init();
 183         if (ret)
 184                 goto debugfs_init_failed;
 185
 186         ret = orangefs_kernel_debug_init();
 187         if (ret)
 188                 goto kernel_debug_init_failed;
 189
 190         ret = orangefs_sysfs_init();
 191         if (ret)
 192                 goto sysfs_init_failed;
 193
 194         /* Initialize the orangefsdev subsystem. */
 195         ret = orangefs_dev_init();
 196         if (ret < 0) {
 197                 gossip_err("%s: could not initialize device subsystem %d!\n",
 198                            __func__,
 199                            ret);
 200                 goto cleanup_device;
 201         }
 202
 203         ret = register_filesystem(&orangefs_fs_type);
 204         if (ret == 0) {
 205                 pr_info("orangefs: module version %s loaded\n", ORANGEFS_VERSION);
 206                 ret = 0;
 207                 goto out;
 208         }
 209
 210         orangefs_sysfs_exit();
 211
 212 cleanup_device:
 213         orangefs_dev_cleanup();
 214
 215 sysfs_init_failed:
 216
 217 kernel_debug_init_failed:
 218
 219 debugfs_init_failed:
 220         orangefs_debugfs_cleanup();
 221
 222 cleanup_key_table:
 223         fsid_key_table_finalize();
 224
 225 cleanup_progress_table:
 226         kfree(htable_ops_in_progress);
 227
 228 cleanup_inode:
 229         orangefs_inode_cache_finalize();
 230
 231 cleanup_op:
 232         op_cache_finalize();
 233
 234 err:
 235         bdi_destroy(&orangefs_backing_dev_info);
 236
 237 out:
 238         return ret;
 239 }
 240
 241 static void __exit orangefs_exit(void)
 242 {
 243         int i = 0;
 244         gossip_debug(GOSSIP_INIT_DEBUG, "orangefs: orangefs_exit called\n");
 245
 246         unregister_filesystem(&orangefs_fs_type);
 247         orangefs_debugfs_cleanup();
 248         orangefs_sysfs_exit();
 249         fsid_key_table_finalize();
 250         orangefs_dev_cleanup();
 251         BUG_ON(!list_empty(&orangefs_request_list));
 252         for (i = 0; i < hash_table_size; i++)
 253                 BUG_ON(!list_empty(&htable_ops_in_progress[i]));
 254
 255         orangefs_inode_cache_finalize();
 256         op_cache_finalize();
 257
 258         kfree(htable_ops_in_progress);
 259
 260         bdi_destroy(&orangefs_backing_dev_info);
 261
 262         pr_info("orangefs: module version %s unloaded\n", ORANGEFS_VERSION);
 263 }
 264
 265 /*
 266  * What we do in this function is to walk the list of operations
 267  * that are in progress in the hash table and mark them as purged as well.
 268  */
 269 void purge_inprogress_ops(void)
 270 {
 271         int i;
 272
 273         for (i = 0; i < hash_table_size; i++) {
 274                 struct orangefs_kernel_op_s *op;
 275                 struct orangefs_kernel_op_s *next;
 276
 277                 spin_lock(&htable_ops_in_progress_lock);
 278                 list_for_each_entry_safe(op,
 279                                          next,
 280                                          &htable_ops_in_progress[i],
 281                                          list) {
 282                         set_op_state_purged(op);
 283                         gossip_debug(GOSSIP_DEV_DEBUG,
 284                                      "%s: op:%s: op_state:%d: process:%s:\n",
 285                                      __func__,
 286                                      get_opname_string(op),
 287                                      op->op_state,
 288                                      current->comm);
 289                 }
 290                 spin_unlock(&htable_ops_in_progress_lock);
 291         }
 292 }
 293
 294 module_init(orangefs_init);
 295 module_exit(orangefs_exit);