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 struct orangefs_stats orangefs_stats;
25
26 /* the size of the hash tables for ops in progress */
27 int hash_table_size = 509;
28
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 orangefs_dcache_timeout_msecs = 50;
34 int orangefs_getattr_timeout_msecs = 50;
35
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");
44
45 static struct file_system_type orangefs_fs_type = {
46 .name = "pvfs2",
47 .mount = orangefs_mount,
48 .kill_sb = orangefs_kill_sb,
49 .owner = THIS_MODULE,
50 };
51
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);
56
57 /*
58 * Blocks non-priority requests from being queued for servicing. This
59 * could be used for protecting the request list data structure, but
60 * for now it's only being used to stall the op addition to the request
61 * list
62 */
63 DEFINE_MUTEX(orangefs_request_mutex);
64
65 /* hash table for storing operations waiting for matching downcall */
66 struct list_head *orangefs_htable_ops_in_progress;
67 DEFINE_SPINLOCK(orangefs_htable_ops_in_progress_lock);
68
69 /* list for queueing upcall operations */
70 LIST_HEAD(orangefs_request_list);
71
72 /* used to protect the above orangefs_request_list */
73 DEFINE_SPINLOCK(orangefs_request_list_lock);
74
75 /* used for incoming request notification */
76 DECLARE_WAIT_QUEUE_HEAD(orangefs_request_list_waitq);
77
orangefs_init(void)78 static int __init orangefs_init(void)
79 {
80 int ret = -1;
81 __u32 i = 0;
82
83 if (op_timeout_secs < 0)
84 op_timeout_secs = 0;
85
86 if (slot_timeout_secs < 0)
87 slot_timeout_secs = 0;
88
89 /* initialize global book keeping data structures */
90 ret = op_cache_initialize();
91 if (ret < 0)
92 goto out;
93
94 ret = orangefs_inode_cache_initialize();
95 if (ret < 0)
96 goto cleanup_op;
97
98 orangefs_htable_ops_in_progress =
99 kcalloc(hash_table_size, sizeof(struct list_head), GFP_KERNEL);
100 if (!orangefs_htable_ops_in_progress) {
101 ret = -ENOMEM;
102 goto cleanup_inode;
103 }
104
105 /* initialize a doubly linked at each hash table index */
106 for (i = 0; i < hash_table_size; i++)
107 INIT_LIST_HEAD(&orangefs_htable_ops_in_progress[i]);
108
109 ret = fsid_key_table_initialize();
110 if (ret < 0)
111 goto cleanup_progress_table;
112
113 /*
114 * Build the contents of /sys/kernel/debug/orangefs/debug-help
115 * from the keywords in the kernel keyword/mask array.
116 *
117 * The keywords in the client keyword/mask array are
118 * unknown at boot time.
119 *
120 * orangefs_prepare_debugfs_help_string will be used again
121 * later to rebuild the debug-help-string after the client starts
122 * and passes along the needed info. The argument signifies
123 * which time orangefs_prepare_debugfs_help_string is being
124 * called.
125 */
126 ret = orangefs_prepare_debugfs_help_string(1);
127 if (ret)
128 goto cleanup_key_table;
129
130 ret = orangefs_debugfs_init(module_parm_debug_mask);
131 if (ret)
132 goto debugfs_init_failed;
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_sysfs;
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_dev_cleanup();
157
158 cleanup_sysfs:
159 orangefs_sysfs_exit();
160
161 sysfs_init_failed:
162
163 debugfs_init_failed:
164 orangefs_debugfs_cleanup();
165
166 cleanup_key_table:
167 fsid_key_table_finalize();
168
169 cleanup_progress_table:
170 kfree(orangefs_htable_ops_in_progress);
171
172 cleanup_inode:
173 orangefs_inode_cache_finalize();
174
175 cleanup_op:
176 op_cache_finalize();
177
178 out:
179 return ret;
180 }
181
orangefs_exit(void)182 static void __exit orangefs_exit(void)
183 {
184 int i = 0;
185 gossip_debug(GOSSIP_INIT_DEBUG, "orangefs: orangefs_exit called\n");
186
187 unregister_filesystem(&orangefs_fs_type);
188 orangefs_debugfs_cleanup();
189 orangefs_sysfs_exit();
190 fsid_key_table_finalize();
191 orangefs_dev_cleanup();
192 BUG_ON(!list_empty(&orangefs_request_list));
193 for (i = 0; i < hash_table_size; i++)
194 BUG_ON(!list_empty(&orangefs_htable_ops_in_progress[i]));
195
196 orangefs_inode_cache_finalize();
197 op_cache_finalize();
198
199 kfree(orangefs_htable_ops_in_progress);
200
201 pr_info("orangefs: module version %s unloaded\n", ORANGEFS_VERSION);
202 }
203
204 /*
205 * What we do in this function is to walk the list of operations
206 * that are in progress in the hash table and mark them as purged as well.
207 */
purge_inprogress_ops(void)208 void purge_inprogress_ops(void)
209 {
210 int i;
211
212 for (i = 0; i < hash_table_size; i++) {
213 struct orangefs_kernel_op_s *op;
214 struct orangefs_kernel_op_s *next;
215
216 spin_lock(&orangefs_htable_ops_in_progress_lock);
217 list_for_each_entry_safe(op,
218 next,
219 &orangefs_htable_ops_in_progress[i],
220 list) {
221 set_op_state_purged(op);
222 gossip_debug(GOSSIP_DEV_DEBUG,
223 "%s: op:%s: op_state:%d: process:%s:\n",
224 __func__,
225 get_opname_string(op),
226 op->op_state,
227 current->comm);
228 }
229 spin_unlock(&orangefs_htable_ops_in_progress_lock);
230 }
231 }
232
233 module_init(orangefs_init);
234 module_exit(orangefs_exit);
235