1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (C) 2002 Cluster File Systems, Inc.
6 * This file is part of Lustre, http://www.lustre.org.
8 * Lustre is free software; you can redistribute it and/or
9 * modify it under the terms of version 2 of the GNU General Public
10 * License as published by the Free Software Foundation.
12 * Lustre is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with Lustre; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 #include <linux/config.h>
25 #include <linux/module.h>
26 #include <linux/version.h>
27 #include <linux/proc_fs.h>
28 #include <linux/slab.h>
29 #include <linux/types.h>
31 #define DEBUG_SUBSYSTEM S_CLASS
32 #define MAX_STRING_SIZE 100
34 #include <linux/lustre_lite.h>
35 #include <linux/lprocfs_status.h>
39 #define DEFAULT_MODE 0444
41 * Tokenizer array. Change this array to include special
42 * characters for string tokenizing
44 const char tok[] = {'/', '\0'};
49 extern struct proc_dir_entry proc_root; /* Defined in proc/root.c */
54 struct proc_dir_entry *proc_lustre_root;
55 struct proc_dir_entry *proc_lustre_dev_root;
56 struct proc_dir_entry *proc_lustre_fs_root;
58 struct proc_dir_entry* lprocfs_mkdir(const char* dname,
59 struct proc_dir_entry *parent)
61 struct proc_dir_entry *child_dir_entry;
63 child_dir_entry = proc_mkdir(dname, parent);
66 CERROR("lustre: failed to create /proc entry %s\n", dname);
68 return child_dir_entry;
71 struct proc_dir_entry* lprocfs_srch(struct proc_dir_entry* head,
74 struct proc_dir_entry* temp;
80 while (temp != NULL) {
81 if (!strcmp(temp->name, name))
89 void lprocfs_remove_all(struct proc_dir_entry* root)
91 struct proc_dir_entry *temp = root;
92 struct proc_dir_entry *rm_entry;
93 struct proc_dir_entry *parent = root->parent;
101 remove_proc_entry(rm_entry->name, rm_entry->parent);
102 if (temp == parent) break;
106 struct proc_dir_entry* lprocfs_new_dir(struct proc_dir_entry* root,
107 const char* string, const char* tok)
109 struct proc_dir_entry* new_root = 0;
110 struct proc_dir_entry* temp_entry = 0;
111 char temp_string[MAX_STRING_SIZE];
115 strncpy(temp_string, string, MAX_STRING_SIZE-1);
116 temp_string[strlen(string) + 1] = '\0';
119 mover_str = temp_string;
120 while ((my_str = strsep(&mover_str, tok))) {
123 CDEBUG(D_OTHER, "SEARCH= %s\t, ROOT=%s\n", my_str,
125 temp_entry = lprocfs_srch(new_root, my_str);
126 if (temp_entry == 0) {
127 CDEBUG(D_OTHER, "Adding: %s\n", my_str);
128 temp_entry = lprocfs_mkdir(my_str, new_root);
129 if (temp_entry == 0) {
131 "! Did not create new dir %s !!\n",
136 new_root = temp_entry;
142 int lprocfs_new_vars(struct proc_dir_entry* root, struct lprocfs_vars* list,
143 const char* tok, void* data)
145 struct proc_dir_entry *temp_root;
146 struct proc_dir_entry *new_leaf;
147 struct proc_dir_entry *new_parent;
148 char temp_string[MAX_STRING_SIZE];
154 temp_root = lprocfs_new_dir(root, list->name, tok);
157 CDEBUG(D_OTHER, "!LProcFS: Mods: No root!");
161 /* Convert the last element into a leaf-node */
162 strncpy(temp_string, temp_root->name, MAX_STRING_SIZE-1);
163 temp_string[strlen(temp_root->name) + 1] = '\0';
164 new_parent = temp_root->parent;
165 remove_proc_entry(temp_root->name, new_parent);
167 new_leaf = create_proc_entry(temp_string, DEFAULT_MODE,
169 new_leaf->read_proc = list->read_fptr;
170 new_leaf->write_proc = list->write_fptr;
171 new_leaf->data = data;
178 * API implementations
180 int lprocfs_add_vars(struct proc_dir_entry *root, struct lprocfs_vars *var,
183 return lprocfs_new_vars(root, var, (const char*) tok, data);
186 int lprocfs_reg_obd(struct obd_device *device, struct lprocfs_vars *list,
190 struct proc_dir_entry* this_dev_root = 0;
192 /* Obtain this device root */
193 this_dev_root = lprocfs_mkdir(device->obd_name,
194 device->obd_type->typ_procroot);
196 device->obd_proc_entry = this_dev_root;
197 retval = lprocfs_add_vars(this_dev_root, list, data);
202 int lprocfs_dereg_obd(struct obd_device* device)
204 CDEBUG(D_OTHER, "LPROCFS removing device = %s\n", device->obd_name);
207 CDEBUG(D_OTHER, "! LProcfs: Null pointer !\n");
211 lprocfs_remove_all(device->obd_proc_entry);
213 if (device->counters)
214 OBD_FREE(device->counters, device->cntr_mem_size);
219 struct proc_dir_entry* lprocfs_reg_mnt(char* mnt_name)
221 return lprocfs_mkdir(mnt_name, proc_lustre_fs_root);
224 int lprocfs_dereg_mnt(struct proc_dir_entry* root)
226 lprocfs_remove_all(root);
230 int lprocfs_reg_class(struct obd_type* type, struct lprocfs_vars* list,
233 struct proc_dir_entry* root;
236 root = lprocfs_mkdir(type->typ_name, proc_lustre_dev_root);
238 type->typ_procroot = root;
240 retval = lprocfs_add_vars(root, list, data);
245 int lprocfs_dereg_class(struct obd_type* class)
248 CDEBUG(D_OTHER, "Non-existent class",
253 lprocfs_remove_all(class->typ_procroot);
255 CDEBUG(D_OTHER, "LPROCFS removed = %s\n", class->typ_name);
260 int lprocfs_reg_main()
262 proc_lustre_root = lprocfs_mkdir("lustre", &proc_root);
263 if (!proc_lustre_root) {
264 CERROR(" !! Cannot create /proc/lustre !! \n");
268 proc_lustre_dev_root = lprocfs_mkdir("devices", proc_lustre_root);
269 if (!proc_lustre_dev_root) {
270 CERROR(" !! Cannot create /proc/lustre/devices !! \n");
273 proc_lustre_fs_root = lprocfs_mkdir("mnt_pnt", proc_lustre_root);
275 if (!proc_lustre_fs_root) {
276 CERROR(" !! Cannot create /proc/lustre/mnt_pnt !! \n");
283 int lprocfs_dereg_main()
285 lprocfs_remove_all(proc_lustre_root);
286 proc_lustre_root = 0;
287 proc_lustre_dev_root = 0;
288 proc_lustre_fs_root = 0;
297 int lprocfs_ll_rd(char *page, char **start, off_t off,
298 int count, int *eof, void *data)
300 __u64 *temp = (__u64 *)data;
303 len = snprintf(page, count, LPU64"\n", *temp);
308 #endif /* LPROC_SNMP */
310 EXPORT_SYMBOL(lprocfs_reg_obd);
311 EXPORT_SYMBOL(lprocfs_dereg_obd);
312 EXPORT_SYMBOL(lprocfs_reg_main);
313 EXPORT_SYMBOL(lprocfs_dereg_main);
314 EXPORT_SYMBOL(lprocfs_reg_mnt);
315 EXPORT_SYMBOL(lprocfs_dereg_mnt);
316 EXPORT_SYMBOL(lprocfs_add_vars);
317 EXPORT_SYMBOL(lprocfs_reg_class);
318 EXPORT_SYMBOL(lprocfs_dereg_class);
319 EXPORT_SYMBOL(lprocfs_ll_rd);