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 "pvfs2-kernel.h"
12 #include "pvfs2-debugfs.h"
13 #include "pvfs2-sysfs.h"
15 /* PVFS2_VERSION is a ./configure define */
17 #define PVFS2_VERSION "Unknown"
21 * global variables declared here
24 /* array of client debug keyword/mask values */
25 struct client_debug_mask *cdm_array;
26 int cdm_element_count;
28 char kernel_debug_string[PVFS2_MAX_DEBUG_STRING_LEN] = "none";
29 char client_debug_string[PVFS2_MAX_DEBUG_STRING_LEN];
30 char client_debug_array_string[PVFS2_MAX_DEBUG_STRING_LEN];
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;
39 struct pvfs2_stats g_pvfs2_stats;
41 /* the size of the hash tables for ops in progress */
42 int hash_table_size = 509;
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 = PVFS2_DEFAULT_OP_TIMEOUT_SECS;
49 int slot_timeout_secs = PVFS2_DEFAULT_SLOT_TIMEOUT_SECS;
51 MODULE_LICENSE("GPL");
52 MODULE_AUTHOR("PVFS2 Development Team");
53 MODULE_DESCRIPTION("The Linux Kernel VFS interface to PVFS2");
54 MODULE_PARM_DESC(module_parm_debug_mask, "debugging level (see pvfs2-debug.h for values)");
55 MODULE_PARM_DESC(op_timeout_secs, "Operation timeout in seconds");
56 MODULE_PARM_DESC(slot_timeout_secs, "Slot timeout in seconds");
57 MODULE_PARM_DESC(hash_table_size,
58 "size of hash table for operations in progress");
60 static struct file_system_type pvfs2_fs_type = {
63 .kill_sb = pvfs2_kill_sb,
67 module_param(hash_table_size, int, 0);
68 module_param(module_parm_debug_mask, ulong, 0644);
69 module_param(op_timeout_secs, int, 0);
70 module_param(slot_timeout_secs, int, 0);
72 /* synchronizes the request device file */
73 struct mutex devreq_mutex;
76 * Blocks non-priority requests from being queued for servicing. This
77 * could be used for protecting the request list data structure, but
78 * for now it's only being used to stall the op addition to the request
81 struct mutex request_mutex;
83 /* hash table for storing operations waiting for matching downcall */
84 struct list_head *htable_ops_in_progress;
85 DEFINE_SPINLOCK(htable_ops_in_progress_lock);
87 /* list for queueing upcall operations */
88 LIST_HEAD(pvfs2_request_list);
90 /* used to protect the above pvfs2_request_list */
91 DEFINE_SPINLOCK(pvfs2_request_list_lock);
93 /* used for incoming request notification */
94 DECLARE_WAIT_QUEUE_HEAD(pvfs2_request_list_waitq);
96 static int __init pvfs2_init(void)
101 /* convert input debug mask to a 64-bit unsigned integer */
102 gossip_debug_mask = (unsigned long long) module_parm_debug_mask;
105 * set the kernel's gossip debug string; invalid mask values will
108 debug_mask_to_string(&gossip_debug_mask, 0);
110 /* remove any invalid values from the mask */
111 debug_string_to_mask(kernel_debug_string, &gossip_debug_mask, 0);
114 * if the mask has a non-zero value, then indicate that the mask
115 * was set when the kernel module was loaded. The pvfs2 dev ioctl
116 * command will look at this boolean to determine if the kernel's
117 * debug mask should be overwritten when the client-core is started.
119 if (gossip_debug_mask != 0)
120 kernel_mask_set_mod_init = true;
122 /* print information message to the system log */
123 pr_info("pvfs2: pvfs2_init called with debug mask: :%s: :%llx:\n",
125 (unsigned long long)gossip_debug_mask);
127 ret = bdi_init(&pvfs2_backing_dev_info);
132 if (op_timeout_secs < 0)
135 if (slot_timeout_secs < 0)
136 slot_timeout_secs = 0;
138 /* initialize global book keeping data structures */
139 ret = op_cache_initialize();
143 ret = dev_req_cache_initialize();
147 ret = pvfs2_inode_cache_initialize();
151 ret = kiocb_cache_initialize();
155 /* Initialize the pvfsdev subsystem. */
156 ret = pvfs2_dev_init();
158 gossip_err("pvfs2: could not initialize device subsystem %d!\n",
163 mutex_init(&devreq_mutex);
164 mutex_init(&request_mutex);
166 htable_ops_in_progress =
167 kcalloc(hash_table_size, sizeof(struct list_head), GFP_KERNEL);
168 if (!htable_ops_in_progress) {
169 gossip_err("Failed to initialize op hashtable");
174 /* initialize a doubly linked at each hash table index */
175 for (i = 0; i < hash_table_size; i++)
176 INIT_LIST_HEAD(&htable_ops_in_progress[i]);
178 ret = fsid_key_table_initialize();
180 goto cleanup_progress_table;
183 * Build the contents of /sys/kernel/debug/orangefs/debug-help
184 * from the keywords in the kernel keyword/mask array.
186 * The keywords in the client keyword/mask array are
187 * unknown at boot time.
189 * orangefs_prepare_debugfs_help_string will be used again
190 * later to rebuild the debug-help file after the client starts
191 * and passes along the needed info. The argument signifies
192 * which time orangefs_prepare_debugfs_help_string is being
196 ret = orangefs_prepare_debugfs_help_string(1);
200 pvfs2_debugfs_init();
201 pvfs2_kernel_debug_init();
202 orangefs_sysfs_init();
204 ret = register_filesystem(&pvfs2_fs_type);
206 pr_info("pvfs2: module version %s loaded\n", PVFS2_VERSION);
210 pvfs2_debugfs_cleanup();
211 orangefs_sysfs_exit();
212 fsid_key_table_finalize();
214 cleanup_progress_table:
215 kfree(htable_ops_in_progress);
221 kiocb_cache_finalize();
224 pvfs2_inode_cache_finalize();
227 dev_req_cache_finalize();
233 bdi_destroy(&pvfs2_backing_dev_info);
239 static void __exit pvfs2_exit(void)
242 struct pvfs2_kernel_op_s *cur_op = NULL;
244 gossip_debug(GOSSIP_INIT_DEBUG, "pvfs2: pvfs2_exit called\n");
246 unregister_filesystem(&pvfs2_fs_type);
247 pvfs2_debugfs_cleanup();
248 orangefs_sysfs_exit();
249 fsid_key_table_finalize();
251 /* clear out all pending upcall op requests */
252 spin_lock(&pvfs2_request_list_lock);
253 while (!list_empty(&pvfs2_request_list)) {
254 cur_op = list_entry(pvfs2_request_list.next,
255 struct pvfs2_kernel_op_s,
257 list_del(&cur_op->list);
258 gossip_debug(GOSSIP_INIT_DEBUG,
259 "Freeing unhandled upcall request type %d\n",
260 cur_op->upcall.type);
263 spin_unlock(&pvfs2_request_list_lock);
265 for (i = 0; i < hash_table_size; i++)
266 while (!list_empty(&htable_ops_in_progress[i])) {
267 cur_op = list_entry(htable_ops_in_progress[i].next,
268 struct pvfs2_kernel_op_s,
273 kiocb_cache_finalize();
274 pvfs2_inode_cache_finalize();
275 dev_req_cache_finalize();
278 kfree(htable_ops_in_progress);
280 bdi_destroy(&pvfs2_backing_dev_info);
282 pr_info("pvfs2: module version %s unloaded\n", PVFS2_VERSION);
286 * What we do in this function is to walk the list of operations
287 * that are in progress in the hash table and mark them as purged as well.
289 void purge_inprogress_ops(void)
293 for (i = 0; i < hash_table_size; i++) {
294 struct pvfs2_kernel_op_s *op;
295 struct pvfs2_kernel_op_s *next;
297 list_for_each_entry_safe(op,
299 &htable_ops_in_progress[i],
301 spin_lock(&op->lock);
302 gossip_debug(GOSSIP_INIT_DEBUG,
303 "pvfs2-client-core: purging in-progress op tag "
306 get_opname_string(op));
307 set_op_state_purged(op);
308 spin_unlock(&op->lock);
309 wake_up_interruptible(&op->waitq);
314 module_init(pvfs2_init);
315 module_exit(pvfs2_exit);