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_IMPORT_NS(ANDROID_GKI_VFS_EXPORT_ONLY);
40 MODULE_AUTHOR("ORANGEFS Development Team");
41 MODULE_DESCRIPTION("The Linux Kernel VFS interface to ORANGEFS");
42 MODULE_PARM_DESC(module_parm_debug_mask, "debugging level (see orangefs-debug.h for values)");
43 MODULE_PARM_DESC(op_timeout_secs, "Operation timeout in seconds");
44 MODULE_PARM_DESC(slot_timeout_secs, "Slot timeout in seconds");
45 MODULE_PARM_DESC(hash_table_size,
46 "size of hash table for operations in progress");
47
48 static struct file_system_type orangefs_fs_type = {
49 .name = "pvfs2",
50 .mount = orangefs_mount,
51 .kill_sb = orangefs_kill_sb,
52 .owner = THIS_MODULE,
53 };
54
55 module_param(hash_table_size, int, 0);
56 module_param(module_parm_debug_mask, ulong, 0644);
57 module_param(op_timeout_secs, int, 0);
58 module_param(slot_timeout_secs, int, 0);
59
60 /*
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
64 * list
65 */
66 DEFINE_MUTEX(orangefs_request_mutex);
67
68 /* hash table for storing operations waiting for matching downcall */
69 struct list_head *orangefs_htable_ops_in_progress;
70 DEFINE_SPINLOCK(orangefs_htable_ops_in_progress_lock);
71
72 /* list for queueing upcall operations */
73 LIST_HEAD(orangefs_request_list);
74
75 /* used to protect the above orangefs_request_list */
76 DEFINE_SPINLOCK(orangefs_request_list_lock);
77
78 /* used for incoming request notification */
79 DECLARE_WAIT_QUEUE_HEAD(orangefs_request_list_waitq);
80
orangefs_init(void)81 static int __init orangefs_init(void)
82 {
83 int ret;
84 __u32 i = 0;
85
86 if (op_timeout_secs < 0)
87 op_timeout_secs = 0;
88
89 if (slot_timeout_secs < 0)
90 slot_timeout_secs = 0;
91
92 /* initialize global book keeping data structures */
93 ret = op_cache_initialize();
94 if (ret < 0)
95 goto out;
96
97 ret = orangefs_inode_cache_initialize();
98 if (ret < 0)
99 goto cleanup_op;
100
101 orangefs_htable_ops_in_progress =
102 kcalloc(hash_table_size, sizeof(struct list_head), GFP_KERNEL);
103 if (!orangefs_htable_ops_in_progress) {
104 ret = -ENOMEM;
105 goto cleanup_inode;
106 }
107
108 /* initialize a doubly linked at each hash table index */
109 for (i = 0; i < hash_table_size; i++)
110 INIT_LIST_HEAD(&orangefs_htable_ops_in_progress[i]);
111
112 ret = fsid_key_table_initialize();
113 if (ret < 0)
114 goto cleanup_progress_table;
115
116 /*
117 * Build the contents of /sys/kernel/debug/orangefs/debug-help
118 * from the keywords in the kernel keyword/mask array.
119 *
120 * The keywords in the client keyword/mask array are
121 * unknown at boot time.
122 *
123 * orangefs_prepare_debugfs_help_string will be used again
124 * later to rebuild the debug-help-string after the client starts
125 * and passes along the needed info. The argument signifies
126 * which time orangefs_prepare_debugfs_help_string is being
127 * called.
128 */
129 ret = orangefs_prepare_debugfs_help_string(1);
130 if (ret)
131 goto cleanup_key_table;
132
133 orangefs_debugfs_init(module_parm_debug_mask);
134
135 ret = orangefs_sysfs_init();
136 if (ret)
137 goto sysfs_init_failed;
138
139 /* Initialize the orangefsdev subsystem. */
140 ret = orangefs_dev_init();
141 if (ret < 0) {
142 gossip_err("%s: could not initialize device subsystem %d!\n",
143 __func__,
144 ret);
145 goto cleanup_sysfs;
146 }
147
148 ret = register_filesystem(&orangefs_fs_type);
149 if (ret == 0) {
150 pr_info("%s: module version %s loaded\n",
151 __func__,
152 ORANGEFS_VERSION);
153 goto out;
154 }
155
156 orangefs_dev_cleanup();
157
158 cleanup_sysfs:
159 orangefs_sysfs_exit();
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
orangefs_exit(void)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 */
purge_inprogress_ops(void)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);
233