2 * What: /sys/kernel/debug/orangefs/debug-help
4 * Contact: Mike Marshall <hubcap@omnibond.com>
6 * List of client and kernel debug keywords.
9 * What: /sys/kernel/debug/orangefs/client-debug
11 * Contact: Mike Marshall <hubcap@omnibond.com>
13 * Debug setting for "the client", the userspace
14 * helper for the kernel module.
17 * What: /sys/kernel/debug/orangefs/kernel-debug
19 * Contact: Mike Marshall <hubcap@omnibond.com>
21 * Debug setting for the orangefs kernel module.
23 * Any of the keywords, or comma-separated lists
24 * of keywords, from debug-help can be catted to
25 * client-debug or kernel-debug.
27 * "none", "all" and "verbose" are special keywords
28 * for client-debug. Setting client-debug to "all"
29 * is kind of like trying to drink water from a
30 * fire hose, "verbose" triggers most of the same
31 * output except for the constant flow of output
32 * from the main wait loop.
34 * "none" and "all" are similar settings for kernel-debug
35 * no need for a "verbose".
37 #include <linux/debugfs.h>
38 #include <linux/slab.h>
40 #include <linux/uaccess.h>
42 #include "orangefs-debugfs.h"
44 #include "orangefs-kernel.h"
46 #define DEBUG_HELP_STRING_SIZE 4096
47 #define HELP_STRING_UNINITIALIZED \
48 "Client Debug Keywords are unknown until the first time\n" \
49 "the client is started after boot.\n"
50 #define ORANGEFS_KMOD_DEBUG_HELP_FILE "debug-help"
51 #define ORANGEFS_KMOD_DEBUG_FILE "kernel-debug"
52 #define ORANGEFS_CLIENT_DEBUG_FILE "client-debug"
53 #define ORANGEFS_VERBOSE "verbose"
54 #define ORANGEFS_ALL "all"
57 * An array of client_debug_mask will be built to hold debug keyword/mask
58 * values fetched from userspace.
60 struct client_debug_mask {
66 static int orangefs_kernel_debug_init(void);
68 static int orangefs_debug_help_open(struct inode *, struct file *);
69 static void *help_start(struct seq_file *, loff_t *);
70 static void *help_next(struct seq_file *, void *, loff_t *);
71 static void help_stop(struct seq_file *, void *);
72 static int help_show(struct seq_file *, void *);
74 static int orangefs_debug_open(struct inode *, struct file *);
76 static ssize_t orangefs_debug_read(struct file *,
81 static ssize_t orangefs_debug_write(struct file *,
86 static int orangefs_prepare_cdm_array(char *);
87 static void debug_mask_to_string(void *, int);
88 static void do_k_string(void *, int);
89 static void do_c_string(void *, int);
90 static int keyword_is_amalgam(char *);
91 static int check_amalgam_keyword(void *, int);
92 static void debug_string_to_mask(char *, void *, int);
93 static void do_c_mask(int, char *, struct client_debug_mask **);
94 static void do_k_mask(int, char *, __u64 **);
96 static char kernel_debug_string[ORANGEFS_MAX_DEBUG_STRING_LEN] = "none";
97 static char *debug_help_string;
98 static char client_debug_string[ORANGEFS_MAX_DEBUG_STRING_LEN];
99 static char client_debug_array_string[ORANGEFS_MAX_DEBUG_STRING_LEN];
101 static struct dentry *help_file_dentry;
102 static struct dentry *client_debug_dentry;
103 static struct dentry *debug_dir;
105 static unsigned int kernel_mask_set_mod_init;
106 static int orangefs_debug_disabled = 1;
107 static int help_string_initialized;
109 static const struct seq_operations help_debug_ops = {
116 const struct file_operations debug_help_fops = {
117 .owner = THIS_MODULE,
118 .open = orangefs_debug_help_open,
120 .release = seq_release,
124 static const struct file_operations kernel_debug_fops = {
125 .owner = THIS_MODULE,
126 .open = orangefs_debug_open,
127 .read = orangefs_debug_read,
128 .write = orangefs_debug_write,
129 .llseek = generic_file_llseek,
132 static int client_all_index;
133 static int client_verbose_index;
135 static struct client_debug_mask *cdm_array;
136 static int cdm_element_count;
138 static struct client_debug_mask client_debug_mask;
141 * Used to protect data in ORANGEFS_KMOD_DEBUG_FILE and
142 * ORANGEFS_KMOD_DEBUG_FILE.
144 static DEFINE_MUTEX(orangefs_debug_lock);
146 /* Used to protect data in ORANGEFS_KMOD_DEBUG_HELP_FILE */
147 static DEFINE_MUTEX(orangefs_help_file_lock);
150 * initialize kmod debug operations, create orangefs debugfs dir and
151 * ORANGEFS_KMOD_DEBUG_HELP_FILE.
153 int orangefs_debugfs_init(int debug_mask)
157 /* convert input debug mask to a 64-bit unsigned integer */
158 orangefs_gossip_debug_mask = (unsigned long long)debug_mask;
161 * set the kernel's gossip debug string; invalid mask values will
164 debug_mask_to_string(&orangefs_gossip_debug_mask, 0);
166 /* remove any invalid values from the mask */
167 debug_string_to_mask(kernel_debug_string, &orangefs_gossip_debug_mask,
171 * if the mask has a non-zero value, then indicate that the mask
172 * was set when the kernel module was loaded. The orangefs dev ioctl
173 * command will look at this boolean to determine if the kernel's
174 * debug mask should be overwritten when the client-core is started.
176 if (orangefs_gossip_debug_mask != 0)
177 kernel_mask_set_mod_init = true;
179 pr_info("%s: called with debug mask: :%s: :%llx:\n",
182 (unsigned long long)orangefs_gossip_debug_mask);
184 debug_dir = debugfs_create_dir("orangefs", NULL);
186 pr_info("%s: debugfs_create_dir failed.\n", __func__);
190 help_file_dentry = debugfs_create_file(ORANGEFS_KMOD_DEBUG_HELP_FILE,
195 if (!help_file_dentry) {
196 pr_info("%s: debugfs_create_file failed.\n", __func__);
200 orangefs_debug_disabled = 0;
202 rc = orangefs_kernel_debug_init();
210 * initialize the kernel-debug file.
212 static int orangefs_kernel_debug_init(void)
216 char *k_buffer = NULL;
218 gossip_debug(GOSSIP_DEBUGFS_DEBUG, "%s: start\n", __func__);
220 k_buffer = kzalloc(ORANGEFS_MAX_DEBUG_STRING_LEN, GFP_KERNEL);
224 if (strlen(kernel_debug_string) + 1 < ORANGEFS_MAX_DEBUG_STRING_LEN) {
225 strcpy(k_buffer, kernel_debug_string);
226 strcat(k_buffer, "\n");
228 strcpy(k_buffer, "none\n");
229 pr_info("%s: overflow 1!\n", __func__);
232 ret = debugfs_create_file(ORANGEFS_KMOD_DEBUG_FILE,
238 pr_info("%s: failed to create %s.\n",
240 ORANGEFS_KMOD_DEBUG_FILE);
248 gossip_debug(GOSSIP_DEBUGFS_DEBUG, "%s: rc:%d:\n", __func__, rc);
253 void orangefs_debugfs_cleanup(void)
255 debugfs_remove_recursive(debug_dir);
256 kfree(debug_help_string);
257 debug_help_string = NULL;
260 /* open ORANGEFS_KMOD_DEBUG_HELP_FILE */
261 static int orangefs_debug_help_open(struct inode *inode, struct file *file)
266 gossip_debug(GOSSIP_DEBUGFS_DEBUG,
267 "orangefs_debug_help_open: start\n");
269 if (orangefs_debug_disabled)
272 ret = seq_open(file, &help_debug_ops);
276 ((struct seq_file *)(file->private_data))->private = inode->i_private;
281 gossip_debug(GOSSIP_DEBUGFS_DEBUG,
282 "orangefs_debug_help_open: rc:%d:\n",
288 * I think start always gets called again after stop. Start
289 * needs to return NULL when it is done. The whole "payload"
290 * in this case is a single (long) string, so by the second
291 * time we get to start (pos = 1), we're done.
293 static void *help_start(struct seq_file *m, loff_t *pos)
295 void *payload = NULL;
297 gossip_debug(GOSSIP_DEBUGFS_DEBUG, "help_start: start\n");
299 mutex_lock(&orangefs_help_file_lock);
302 payload = m->private;
307 static void *help_next(struct seq_file *m, void *v, loff_t *pos)
310 gossip_debug(GOSSIP_DEBUGFS_DEBUG, "help_next: start\n");
315 static void help_stop(struct seq_file *m, void *p)
317 gossip_debug(GOSSIP_DEBUGFS_DEBUG, "help_stop: start\n");
318 mutex_unlock(&orangefs_help_file_lock);
321 static int help_show(struct seq_file *m, void *v)
323 gossip_debug(GOSSIP_DEBUGFS_DEBUG, "help_show: start\n");
331 * initialize the client-debug file.
333 int orangefs_client_debug_init(void)
337 char *c_buffer = NULL;
339 gossip_debug(GOSSIP_DEBUGFS_DEBUG, "%s: start\n", __func__);
341 c_buffer = kzalloc(ORANGEFS_MAX_DEBUG_STRING_LEN, GFP_KERNEL);
345 if (strlen(client_debug_string) + 1 < ORANGEFS_MAX_DEBUG_STRING_LEN) {
346 strcpy(c_buffer, client_debug_string);
347 strcat(c_buffer, "\n");
349 strcpy(c_buffer, "none\n");
350 pr_info("%s: overflow! 2\n", __func__);
353 client_debug_dentry = debugfs_create_file(ORANGEFS_CLIENT_DEBUG_FILE,
358 if (!client_debug_dentry) {
359 pr_info("%s: failed to create updated %s.\n",
361 ORANGEFS_CLIENT_DEBUG_FILE);
369 gossip_debug(GOSSIP_DEBUGFS_DEBUG, "%s: rc:%d:\n", __func__, rc);
373 /* open ORANGEFS_KMOD_DEBUG_FILE or ORANGEFS_CLIENT_DEBUG_FILE.*/
374 static int orangefs_debug_open(struct inode *inode, struct file *file)
378 gossip_debug(GOSSIP_DEBUGFS_DEBUG,
379 "%s: orangefs_debug_disabled: %d\n",
381 orangefs_debug_disabled);
383 if (orangefs_debug_disabled)
387 mutex_lock(&orangefs_debug_lock);
388 file->private_data = inode->i_private;
389 mutex_unlock(&orangefs_debug_lock);
392 gossip_debug(GOSSIP_DEBUGFS_DEBUG,
393 "orangefs_debug_open: rc: %d\n",
398 static ssize_t orangefs_debug_read(struct file *file,
405 ssize_t read_ret = -ENOMEM;
407 gossip_debug(GOSSIP_DEBUGFS_DEBUG, "orangefs_debug_read: start\n");
409 buf = kmalloc(ORANGEFS_MAX_DEBUG_STRING_LEN, GFP_KERNEL);
413 mutex_lock(&orangefs_debug_lock);
414 sprintf_ret = sprintf(buf, "%s", (char *)file->private_data);
415 mutex_unlock(&orangefs_debug_lock);
417 read_ret = simple_read_from_buffer(ubuf, count, ppos, buf, sprintf_ret);
422 gossip_debug(GOSSIP_DEBUGFS_DEBUG,
423 "orangefs_debug_read: ret: %zu\n",
429 static ssize_t orangefs_debug_write(struct file *file,
430 const char __user *ubuf,
438 struct orangefs_kernel_op_s *new_op = NULL;
439 struct client_debug_mask c_mask = { NULL, 0, 0 };
441 gossip_debug(GOSSIP_DEBUGFS_DEBUG,
442 "orangefs_debug_write: %pD\n",
446 * Thwart users who try to jamb a ridiculous number
447 * of bytes into the debug file...
449 if (count > ORANGEFS_MAX_DEBUG_STRING_LEN + 1) {
451 count = ORANGEFS_MAX_DEBUG_STRING_LEN + 1;
454 buf = kzalloc(ORANGEFS_MAX_DEBUG_STRING_LEN, GFP_KERNEL);
458 if (copy_from_user(buf, ubuf, count - 1)) {
459 gossip_debug(GOSSIP_DEBUGFS_DEBUG,
460 "%s: copy_from_user failed!\n",
466 * Map the keyword string from userspace into a valid debug mask.
467 * The mapping process involves mapping the human-inputted string
468 * into a valid mask, and then rebuilding the string from the
469 * verified valid mask.
471 * A service operation is required to set a new client-side
474 if (!strcmp(file->f_path.dentry->d_name.name,
475 ORANGEFS_KMOD_DEBUG_FILE)) {
476 debug_string_to_mask(buf, &orangefs_gossip_debug_mask, 0);
477 debug_mask_to_string(&orangefs_gossip_debug_mask, 0);
478 debug_string = kernel_debug_string;
479 gossip_debug(GOSSIP_DEBUGFS_DEBUG,
480 "New kernel debug string is %s\n",
481 kernel_debug_string);
483 /* Can't reset client debug mask if client is not running. */
484 if (is_daemon_in_service()) {
485 pr_info("%s: Client not running :%d:\n",
487 is_daemon_in_service());
491 debug_string_to_mask(buf, &c_mask, 1);
492 debug_mask_to_string(&c_mask, 1);
493 debug_string = client_debug_string;
495 new_op = op_alloc(ORANGEFS_VFS_OP_PARAM);
497 pr_info("%s: op_alloc failed!\n", __func__);
501 new_op->upcall.req.param.op =
502 ORANGEFS_PARAM_REQUEST_OP_TWO_MASK_VALUES;
503 new_op->upcall.req.param.type = ORANGEFS_PARAM_REQUEST_SET;
504 memset(new_op->upcall.req.param.s_value,
506 ORANGEFS_MAX_DEBUG_STRING_LEN);
507 sprintf(new_op->upcall.req.param.s_value,
512 /* service_operation returns 0 on success... */
513 rc = service_operation(new_op,
515 ORANGEFS_OP_INTERRUPTIBLE);
518 gossip_debug(GOSSIP_DEBUGFS_DEBUG,
519 "%s: service_operation failed! rc:%d:\n",
526 mutex_lock(&orangefs_debug_lock);
527 memset(file->f_inode->i_private, 0, ORANGEFS_MAX_DEBUG_STRING_LEN);
528 sprintf((char *)file->f_inode->i_private, "%s\n", debug_string);
529 mutex_unlock(&orangefs_debug_lock);
538 gossip_debug(GOSSIP_DEBUGFS_DEBUG,
539 "orangefs_debug_write: rc: %d\n",
546 * After obtaining a string representation of the client's debug
547 * keywords and their associated masks, this function is called to build an
548 * array of these values.
550 static int orangefs_prepare_cdm_array(char *debug_array_string)
554 char *cds_head = NULL;
555 char *cds_delimiter = NULL;
558 gossip_debug(GOSSIP_UTILS_DEBUG, "%s: start\n", __func__);
561 * figure out how many elements the cdm_array needs.
563 for (i = 0; i < strlen(debug_array_string); i++)
564 if (debug_array_string[i] == '\n')
567 if (!cdm_element_count) {
568 pr_info("No elements in client debug array string!\n");
573 kzalloc(cdm_element_count * sizeof(struct client_debug_mask),
576 pr_info("malloc failed for cdm_array!\n");
581 cds_head = debug_array_string;
583 for (i = 0; i < cdm_element_count; i++) {
584 cds_delimiter = strchr(cds_head, '\n');
585 *cds_delimiter = '\0';
587 keyword_len = strcspn(cds_head, " ");
589 cdm_array[i].keyword = kzalloc(keyword_len + 1, GFP_KERNEL);
590 if (!cdm_array[i].keyword) {
597 cdm_array[i].keyword,
598 (unsigned long long *)&(cdm_array[i].mask1),
599 (unsigned long long *)&(cdm_array[i].mask2));
601 if (!strcmp(cdm_array[i].keyword, ORANGEFS_VERBOSE))
602 client_verbose_index = i;
604 if (!strcmp(cdm_array[i].keyword, ORANGEFS_ALL))
605 client_all_index = i;
607 cds_head = cds_delimiter + 1;
610 rc = cdm_element_count;
612 gossip_debug(GOSSIP_UTILS_DEBUG, "%s: rc:%d:\n", __func__, rc);
621 * /sys/kernel/debug/orangefs/debug-help can be catted to
622 * see all the available kernel and client debug keywords.
624 * When orangefs.ko initializes, we have no idea what keywords the
625 * client supports, nor their associated masks.
627 * We pass through this function once at module-load and stamp a
628 * boilerplate "we don't know" message for the client in the
629 * debug-help file. We pass through here again when the client
630 * starts and then we can fill out the debug-help file fully.
632 * The client might be restarted any number of times between
633 * module reloads, we only build the debug-help file the first time.
635 int orangefs_prepare_debugfs_help_string(int at_boot)
637 char *client_title = "Client Debug Keywords:\n";
638 char *kernel_title = "Kernel Debug Keywords:\n";
639 size_t string_size = DEBUG_HELP_STRING_SIZE;
645 gossip_debug(GOSSIP_UTILS_DEBUG, "%s: start\n", __func__);
648 client_title = HELP_STRING_UNINITIALIZED;
650 /* build a new debug_help_string. */
651 new = kzalloc(DEBUG_HELP_STRING_SIZE, GFP_KERNEL);
658 * strlcat(dst, src, size) will append at most
659 * "size - strlen(dst) - 1" bytes of src onto dst,
660 * null terminating the result, and return the total
661 * length of the string it tried to create.
663 * We'll just plow through here building our new debug
664 * help string and let strlcat take care of assuring that
665 * dst doesn't overflow.
667 strlcat(new, client_title, string_size);
672 * fill the client keyword/mask array and remember
673 * how many elements there were.
676 orangefs_prepare_cdm_array(client_debug_array_string);
677 if (cdm_element_count <= 0) {
682 for (i = 0; i < cdm_element_count; i++) {
683 strlcat(new, "\t", string_size);
684 strlcat(new, cdm_array[i].keyword, string_size);
685 strlcat(new, "\n", string_size);
689 strlcat(new, "\n", string_size);
690 strlcat(new, kernel_title, string_size);
692 for (i = 0; i < num_kmod_keyword_mask_map; i++) {
693 strlcat(new, "\t", string_size);
694 strlcat(new, s_kmod_keyword_mask_map[i].keyword, string_size);
695 result_size = strlcat(new, "\n", string_size);
698 /* See if we tried to put too many bytes into "new"... */
699 if (result_size >= string_size) {
705 debug_help_string = new;
707 mutex_lock(&orangefs_help_file_lock);
708 memset(debug_help_string, 0, DEBUG_HELP_STRING_SIZE);
709 strlcat(debug_help_string, new, string_size);
710 mutex_unlock(&orangefs_help_file_lock);
724 static void debug_mask_to_string(void *mask, int type)
729 int element_count = 0;
731 gossip_debug(GOSSIP_UTILS_DEBUG, "%s: start\n", __func__);
734 debug_string = client_debug_string;
735 element_count = cdm_element_count;
737 debug_string = kernel_debug_string;
738 element_count = num_kmod_keyword_mask_map;
741 memset(debug_string, 0, ORANGEFS_MAX_DEBUG_STRING_LEN);
744 * Some keywords, like "all" or "verbose", are amalgams of
745 * numerous other keywords. Make a special check for those
746 * before grinding through the whole mask only to find out
749 if (check_amalgam_keyword(mask, type))
752 /* Build the debug string. */
753 for (i = 0; i < element_count; i++)
755 do_c_string(mask, i);
757 do_k_string(mask, i);
759 len = strlen(debug_string);
762 client_debug_string[len - 1] = '\0';
764 kernel_debug_string[len - 1] = '\0';
766 strcpy(client_debug_string, "none");
768 strcpy(kernel_debug_string, "none");
771 gossip_debug(GOSSIP_UTILS_DEBUG, "%s: string:%s:\n", __func__, debug_string);
777 static void do_k_string(void *k_mask, int index)
779 __u64 *mask = (__u64 *) k_mask;
781 if (keyword_is_amalgam((char *) s_kmod_keyword_mask_map[index].keyword))
784 if (*mask & s_kmod_keyword_mask_map[index].mask_val) {
785 if ((strlen(kernel_debug_string) +
786 strlen(s_kmod_keyword_mask_map[index].keyword))
787 < ORANGEFS_MAX_DEBUG_STRING_LEN - 1) {
788 strcat(kernel_debug_string,
789 s_kmod_keyword_mask_map[index].keyword);
790 strcat(kernel_debug_string, ",");
792 gossip_err("%s: overflow!\n", __func__);
793 strcpy(kernel_debug_string, ORANGEFS_ALL);
803 static void do_c_string(void *c_mask, int index)
805 struct client_debug_mask *mask = (struct client_debug_mask *) c_mask;
807 if (keyword_is_amalgam(cdm_array[index].keyword))
810 if ((mask->mask1 & cdm_array[index].mask1) ||
811 (mask->mask2 & cdm_array[index].mask2)) {
812 if ((strlen(client_debug_string) +
813 strlen(cdm_array[index].keyword) + 1)
814 < ORANGEFS_MAX_DEBUG_STRING_LEN - 2) {
815 strcat(client_debug_string,
816 cdm_array[index].keyword);
817 strcat(client_debug_string, ",");
819 gossip_err("%s: overflow!\n", __func__);
820 strcpy(client_debug_string, ORANGEFS_ALL);
828 static int keyword_is_amalgam(char *keyword)
832 if ((!strcmp(keyword, ORANGEFS_ALL)) || (!strcmp(keyword, ORANGEFS_VERBOSE)))
842 * return 1 if we found an amalgam.
844 static int check_amalgam_keyword(void *mask, int type)
847 struct client_debug_mask *c_mask;
848 int k_all_index = num_kmod_keyword_mask_map - 1;
852 c_mask = (struct client_debug_mask *) mask;
854 if ((c_mask->mask1 == cdm_array[client_all_index].mask1) &&
855 (c_mask->mask2 == cdm_array[client_all_index].mask2)) {
856 strcpy(client_debug_string, ORANGEFS_ALL);
861 if ((c_mask->mask1 == cdm_array[client_verbose_index].mask1) &&
862 (c_mask->mask2 == cdm_array[client_verbose_index].mask2)) {
863 strcpy(client_debug_string, ORANGEFS_VERBOSE);
869 k_mask = (__u64 *) mask;
871 if (*k_mask >= s_kmod_keyword_mask_map[k_all_index].mask_val) {
872 strcpy(kernel_debug_string, ORANGEFS_ALL);
887 static void debug_string_to_mask(char *debug_string, void *mask, int type)
889 char *unchecked_keyword;
891 char *strsep_fodder = kstrdup(debug_string, GFP_KERNEL);
892 char *original_pointer;
893 int element_count = 0;
894 struct client_debug_mask *c_mask = NULL;
895 __u64 *k_mask = NULL;
897 gossip_debug(GOSSIP_UTILS_DEBUG, "%s: start\n", __func__);
900 c_mask = (struct client_debug_mask *)mask;
901 element_count = cdm_element_count;
903 k_mask = (__u64 *)mask;
905 element_count = num_kmod_keyword_mask_map;
908 original_pointer = strsep_fodder;
909 while ((unchecked_keyword = strsep(&strsep_fodder, ",")))
910 if (strlen(unchecked_keyword)) {
911 for (i = 0; i < element_count; i++)
922 kfree(original_pointer);
925 static void do_c_mask(int i, char *unchecked_keyword,
926 struct client_debug_mask **sane_mask)
929 if (!strcmp(cdm_array[i].keyword, unchecked_keyword)) {
930 (**sane_mask).mask1 = (**sane_mask).mask1 | cdm_array[i].mask1;
931 (**sane_mask).mask2 = (**sane_mask).mask2 | cdm_array[i].mask2;
935 static void do_k_mask(int i, char *unchecked_keyword, __u64 **sane_mask)
938 if (!strcmp(s_kmod_keyword_mask_map[i].keyword, unchecked_keyword))
939 **sane_mask = (**sane_mask) |
940 s_kmod_keyword_mask_map[i].mask_val;
943 int orangefs_debugfs_new_client_mask(void __user *arg)
945 struct dev_mask2_info_s mask2_info = {0};
948 ret = copy_from_user(&mask2_info,
950 sizeof(struct dev_mask2_info_s));
955 client_debug_mask.mask1 = mask2_info.mask1_value;
956 client_debug_mask.mask2 = mask2_info.mask2_value;
958 pr_info("%s: client debug mask has been been received "
961 (unsigned long long)client_debug_mask.mask1,
962 (unsigned long long)client_debug_mask.mask2);
967 int orangefs_debugfs_new_client_string(void __user *arg)
971 ret = copy_from_user(&client_debug_array_string,
973 ORANGEFS_MAX_DEBUG_STRING_LEN);
976 pr_info("%s: CLIENT_STRING: copy_from_user failed\n",
982 * The real client-core makes an effort to ensure
983 * that actual strings that aren't too long to fit in
984 * this buffer is what we get here. We're going to use
985 * string functions on the stuff we got, so we'll make
986 * this extra effort to try and keep from
987 * flowing out of this buffer when we use the string
988 * functions, even if somehow the stuff we end up
989 * with here is garbage.
991 client_debug_array_string[ORANGEFS_MAX_DEBUG_STRING_LEN - 1] =
994 pr_info("%s: client debug array string has been received.\n",
997 if (!help_string_initialized) {
999 /* Build a proper debug help string. */
1000 ret = orangefs_prepare_debugfs_help_string(0);
1002 gossip_err("%s: no debug help string \n",
1009 debug_mask_to_string(&client_debug_mask, 1);
1011 debugfs_remove(client_debug_dentry);
1013 orangefs_client_debug_init();
1015 help_string_initialized++;
1020 int orangefs_debugfs_new_debug(void __user *arg)
1022 struct dev_mask_info_s mask_info = {0};
1025 ret = copy_from_user(&mask_info,
1032 if (mask_info.mask_type == KERNEL_MASK) {
1033 if ((mask_info.mask_value == 0)
1034 && (kernel_mask_set_mod_init)) {
1036 * the kernel debug mask was set when the
1037 * kernel module was loaded; don't override
1038 * it if the client-core was started without
1039 * a value for ORANGEFS_KMODMASK.
1043 debug_mask_to_string(&mask_info.mask_value,
1044 mask_info.mask_type);
1045 orangefs_gossip_debug_mask = mask_info.mask_value;
1046 pr_info("%s: kernel debug mask has been modified to "
1049 kernel_debug_string,
1050 (unsigned long long)orangefs_gossip_debug_mask);
1051 } else if (mask_info.mask_type == CLIENT_MASK) {
1052 debug_mask_to_string(&mask_info.mask_value,
1053 mask_info.mask_type);
1054 pr_info("%s: client debug mask has been modified to"
1057 client_debug_string,
1058 llu(mask_info.mask_value));
1060 gossip_lerr("Invalid mask type....\n");