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TOMOYO Linux Cross Reference
Linux/fs/orangefs/orangefs-mod.c

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

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