root/fs/orangefs/orangefs-mod.c

DEFINITIONS

1. orangefs_init
2. orangefs_exit
3. purge_inprogress_ops

   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 = 50;
  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 = -1;
  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                 ret = 0;
 153                 goto out;
 154         }
 155 
 156         orangefs_sysfs_exit();
 157 
 158 cleanup_device:
 159         orangefs_dev_cleanup();
 160 
 161 sysfs_init_failed:
 162         orangefs_debugfs_cleanup();
 163 
 164 cleanup_key_table:
 165         fsid_key_table_finalize();
 166 
 167 cleanup_progress_table:
 168         kfree(orangefs_htable_ops_in_progress);
 169 
 170 cleanup_inode:
 171         orangefs_inode_cache_finalize();
 172 
 173 cleanup_op:
 174         op_cache_finalize();
 175 
 176 out:
 177         return ret;
 178 }
 179 
 180 static void __exit orangefs_exit(void)
 181 {
 182         int i = 0;
 183         gossip_debug(GOSSIP_INIT_DEBUG, "orangefs: orangefs_exit called\n");
 184 
 185         unregister_filesystem(&orangefs_fs_type);
 186         orangefs_debugfs_cleanup();
 187         orangefs_sysfs_exit();
 188         fsid_key_table_finalize();
 189         orangefs_dev_cleanup();
 190         BUG_ON(!list_empty(&orangefs_request_list));
 191         for (i = 0; i < hash_table_size; i++)
 192                 BUG_ON(!list_empty(&orangefs_htable_ops_in_progress[i]));
 193 
 194         orangefs_inode_cache_finalize();
 195         op_cache_finalize();
 196 
 197         kfree(orangefs_htable_ops_in_progress);
 198 
 199         pr_info("orangefs: module version %s unloaded\n", ORANGEFS_VERSION);
 200 }
 201 
 202 /*
 203  * What we do in this function is to walk the list of operations
 204  * that are in progress in the hash table and mark them as purged as well.
 205  */
 206 void purge_inprogress_ops(void)
 207 {
 208         int i;
 209 
 210         for (i = 0; i < hash_table_size; i++) {
 211                 struct orangefs_kernel_op_s *op;
 212                 struct orangefs_kernel_op_s *next;
 213 
 214                 spin_lock(&orangefs_htable_ops_in_progress_lock);
 215                 list_for_each_entry_safe(op,
 216                                          next,
 217                                          &orangefs_htable_ops_in_progress[i],
 218                                          list) {
 219                         set_op_state_purged(op);
 220                         gossip_debug(GOSSIP_DEV_DEBUG,
 221                                      "%s: op:%s: op_state:%d: process:%s:\n",
 222                                      __func__,
 223                                      get_opname_string(op),
 224                                      op->op_state,
 225                                      current->comm);
 226                 }
 227                 spin_unlock(&orangefs_htable_ops_in_progress_lock);
 228         }
 229 }
 230 
 231 module_init(orangefs_init);
 232 module_exit(orangefs_exit);