2 * (C) 2001 Clemson University and The University of Chicago
4 * Changes by Acxiom Corporation to add proc file handler for pvfs2 client
5 * parameters, Copyright Acxiom Corporation, 2005.
7 * See COPYING in top-level directory.
11 #include "orangefs-kernel.h"
12 #include "orangefs-debugfs.h"
13 #include "orangefs-sysfs.h"
15 /* ORANGEFS_VERSION is a ./configure define */
16 #ifndef ORANGEFS_VERSION
17 #define ORANGEFS_VERSION "upstream"
21 * global variables declared here
24 struct orangefs_stats g_orangefs_stats;
26 /* the size of the hash tables for ops in progress */
27 int hash_table_size = 509;
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 dcache_timeout_msecs = 50;
34 int getattr_timeout_msecs = 50;
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");
45 static struct file_system_type orangefs_fs_type = {
47 .mount = orangefs_mount,
48 .kill_sb = orangefs_kill_sb,
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);
57 /* synchronizes the request device file */
58 DEFINE_MUTEX(devreq_mutex);
61 * Blocks non-priority requests from being queued for servicing. This
62 * could be used for protecting the request list data structure, but
63 * for now it's only being used to stall the op addition to the request
66 DEFINE_MUTEX(request_mutex);
68 /* hash table for storing operations waiting for matching downcall */
69 struct list_head *htable_ops_in_progress;
70 DEFINE_SPINLOCK(htable_ops_in_progress_lock);
72 /* list for queueing upcall operations */
73 LIST_HEAD(orangefs_request_list);
75 /* used to protect the above orangefs_request_list */
76 DEFINE_SPINLOCK(orangefs_request_list_lock);
78 /* used for incoming request notification */
79 DECLARE_WAIT_QUEUE_HEAD(orangefs_request_list_waitq);
81 static int __init orangefs_init(void)
86 ret = bdi_init(&orangefs_backing_dev_info);
91 if (op_timeout_secs < 0)
94 if (slot_timeout_secs < 0)
95 slot_timeout_secs = 0;
97 /* initialize global book keeping data structures */
98 ret = op_cache_initialize();
102 ret = orangefs_inode_cache_initialize();
106 htable_ops_in_progress =
107 kcalloc(hash_table_size, sizeof(struct list_head), GFP_KERNEL);
108 if (!htable_ops_in_progress) {
109 gossip_err("Failed to initialize op hashtable");
114 /* initialize a doubly linked at each hash table index */
115 for (i = 0; i < hash_table_size; i++)
116 INIT_LIST_HEAD(&htable_ops_in_progress[i]);
118 ret = fsid_key_table_initialize();
120 goto cleanup_progress_table;
123 * Build the contents of /sys/kernel/debug/orangefs/debug-help
124 * from the keywords in the kernel keyword/mask array.
126 * The keywords in the client keyword/mask array are
127 * unknown at boot time.
129 * orangefs_prepare_debugfs_help_string will be used again
130 * later to rebuild the debug-help file after the client starts
131 * and passes along the needed info. The argument signifies
132 * which time orangefs_prepare_debugfs_help_string is being
135 ret = orangefs_prepare_debugfs_help_string(1);
137 goto cleanup_key_table;
139 ret = orangefs_debugfs_init(module_parm_debug_mask);
141 goto debugfs_init_failed;
143 ret = orangefs_sysfs_init();
145 goto sysfs_init_failed;
147 /* Initialize the orangefsdev subsystem. */
148 ret = orangefs_dev_init();
150 gossip_err("%s: could not initialize device subsystem %d!\n",
156 ret = register_filesystem(&orangefs_fs_type);
158 pr_info("orangefs: module version %s loaded\n", ORANGEFS_VERSION);
163 orangefs_sysfs_exit();
166 orangefs_dev_cleanup();
171 orangefs_debugfs_cleanup();
174 fsid_key_table_finalize();
176 cleanup_progress_table:
177 kfree(htable_ops_in_progress);
180 orangefs_inode_cache_finalize();
186 bdi_destroy(&orangefs_backing_dev_info);
192 static void __exit orangefs_exit(void)
195 gossip_debug(GOSSIP_INIT_DEBUG, "orangefs: orangefs_exit called\n");
197 unregister_filesystem(&orangefs_fs_type);
198 orangefs_debugfs_cleanup();
199 orangefs_sysfs_exit();
200 fsid_key_table_finalize();
201 orangefs_dev_cleanup();
202 BUG_ON(!list_empty(&orangefs_request_list));
203 for (i = 0; i < hash_table_size; i++)
204 BUG_ON(!list_empty(&htable_ops_in_progress[i]));
206 orangefs_inode_cache_finalize();
209 kfree(htable_ops_in_progress);
211 bdi_destroy(&orangefs_backing_dev_info);
213 pr_info("orangefs: module version %s unloaded\n", ORANGEFS_VERSION);
217 * What we do in this function is to walk the list of operations
218 * that are in progress in the hash table and mark them as purged as well.
220 void purge_inprogress_ops(void)
224 for (i = 0; i < hash_table_size; i++) {
225 struct orangefs_kernel_op_s *op;
226 struct orangefs_kernel_op_s *next;
228 spin_lock(&htable_ops_in_progress_lock);
229 list_for_each_entry_safe(op,
231 &htable_ops_in_progress[i],
233 set_op_state_purged(op);
234 gossip_debug(GOSSIP_DEV_DEBUG,
235 "%s: op:%s: op_state:%d: process:%s:\n",
237 get_opname_string(op),
241 spin_unlock(&htable_ops_in_progress_lock);
245 module_init(orangefs_init);
246 module_exit(orangefs_exit);