From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- fs/orangefs/orangefs-debugfs.c | 1010 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 1010 insertions(+) create mode 100644 fs/orangefs/orangefs-debugfs.c (limited to 'fs/orangefs/orangefs-debugfs.c') diff --git a/fs/orangefs/orangefs-debugfs.c b/fs/orangefs/orangefs-debugfs.c new file mode 100644 index 000000000..1b508f543 --- /dev/null +++ b/fs/orangefs/orangefs-debugfs.c @@ -0,0 +1,1010 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * What: /sys/kernel/debug/orangefs/debug-help + * Date: June 2015 + * Contact: Mike Marshall + * Description: + * List of client and kernel debug keywords. + * + * + * What: /sys/kernel/debug/orangefs/client-debug + * Date: June 2015 + * Contact: Mike Marshall + * Description: + * Debug setting for "the client", the userspace + * helper for the kernel module. + * + * + * What: /sys/kernel/debug/orangefs/kernel-debug + * Date: June 2015 + * Contact: Mike Marshall + * Description: + * Debug setting for the orangefs kernel module. + * + * Any of the keywords, or comma-separated lists + * of keywords, from debug-help can be catted to + * client-debug or kernel-debug. + * + * "none", "all" and "verbose" are special keywords + * for client-debug. Setting client-debug to "all" + * is kind of like trying to drink water from a + * fire hose, "verbose" triggers most of the same + * output except for the constant flow of output + * from the main wait loop. + * + * "none" and "all" are similar settings for kernel-debug + * no need for a "verbose". + */ +#include +#include + +#include + +#include "orangefs-debugfs.h" +#include "protocol.h" +#include "orangefs-kernel.h" + +#define DEBUG_HELP_STRING_SIZE 4096 +#define HELP_STRING_UNINITIALIZED \ + "Client Debug Keywords are unknown until the first time\n" \ + "the client is started after boot.\n" +#define ORANGEFS_KMOD_DEBUG_HELP_FILE "debug-help" +#define ORANGEFS_KMOD_DEBUG_FILE "kernel-debug" +#define ORANGEFS_CLIENT_DEBUG_FILE "client-debug" +#define ORANGEFS_VERBOSE "verbose" +#define ORANGEFS_ALL "all" + +/* + * An array of client_debug_mask will be built to hold debug keyword/mask + * values fetched from userspace. + */ +struct client_debug_mask { + char *keyword; + __u64 mask1; + __u64 mask2; +}; + +static void orangefs_kernel_debug_init(void); + +static int orangefs_debug_help_open(struct inode *, struct file *); +static void *help_start(struct seq_file *, loff_t *); +static void *help_next(struct seq_file *, void *, loff_t *); +static void help_stop(struct seq_file *, void *); +static int help_show(struct seq_file *, void *); + +static int orangefs_debug_open(struct inode *, struct file *); + +static ssize_t orangefs_debug_read(struct file *, + char __user *, + size_t, + loff_t *); + +static ssize_t orangefs_debug_write(struct file *, + const char __user *, + size_t, + loff_t *); + +static int orangefs_prepare_cdm_array(char *); +static void debug_mask_to_string(void *, int); +static void do_k_string(void *, int); +static void do_c_string(void *, int); +static int keyword_is_amalgam(char *); +static int check_amalgam_keyword(void *, int); +static void debug_string_to_mask(char *, void *, int); +static void do_c_mask(int, char *, struct client_debug_mask **); +static void do_k_mask(int, char *, __u64 **); + +static char kernel_debug_string[ORANGEFS_MAX_DEBUG_STRING_LEN] = "none"; +static char *debug_help_string; +static char client_debug_string[ORANGEFS_MAX_DEBUG_STRING_LEN]; +static char client_debug_array_string[ORANGEFS_MAX_DEBUG_STRING_LEN]; + +static struct dentry *client_debug_dentry; +static struct dentry *debug_dir; + +static unsigned int kernel_mask_set_mod_init; +static int orangefs_debug_disabled = 1; +static int help_string_initialized; + +static const struct seq_operations help_debug_ops = { + .start = help_start, + .next = help_next, + .stop = help_stop, + .show = help_show, +}; + +static const struct file_operations debug_help_fops = { + .owner = THIS_MODULE, + .open = orangefs_debug_help_open, + .read = seq_read, + .release = seq_release, + .llseek = seq_lseek, +}; + +static const struct file_operations kernel_debug_fops = { + .owner = THIS_MODULE, + .open = orangefs_debug_open, + .read = orangefs_debug_read, + .write = orangefs_debug_write, + .llseek = generic_file_llseek, +}; + +static int client_all_index; +static int client_verbose_index; + +static struct client_debug_mask *cdm_array; +static int cdm_element_count; + +static struct client_debug_mask client_debug_mask; + +/* + * Used to protect data in ORANGEFS_KMOD_DEBUG_FILE and + * ORANGEFS_KMOD_DEBUG_FILE. + */ +static DEFINE_MUTEX(orangefs_debug_lock); + +/* Used to protect data in ORANGEFS_KMOD_DEBUG_HELP_FILE */ +static DEFINE_MUTEX(orangefs_help_file_lock); + +/* + * initialize kmod debug operations, create orangefs debugfs dir and + * ORANGEFS_KMOD_DEBUG_HELP_FILE. + */ +void orangefs_debugfs_init(int debug_mask) +{ + /* convert input debug mask to a 64-bit unsigned integer */ + orangefs_gossip_debug_mask = (unsigned long long)debug_mask; + + /* + * set the kernel's gossip debug string; invalid mask values will + * be ignored. + */ + debug_mask_to_string(&orangefs_gossip_debug_mask, 0); + + /* remove any invalid values from the mask */ + debug_string_to_mask(kernel_debug_string, &orangefs_gossip_debug_mask, + 0); + + /* + * if the mask has a non-zero value, then indicate that the mask + * was set when the kernel module was loaded. The orangefs dev ioctl + * command will look at this boolean to determine if the kernel's + * debug mask should be overwritten when the client-core is started. + */ + if (orangefs_gossip_debug_mask != 0) + kernel_mask_set_mod_init = true; + + pr_info("%s: called with debug mask: :%s: :%llx:\n", + __func__, + kernel_debug_string, + (unsigned long long)orangefs_gossip_debug_mask); + + debug_dir = debugfs_create_dir("orangefs", NULL); + + debugfs_create_file(ORANGEFS_KMOD_DEBUG_HELP_FILE, 0444, debug_dir, + debug_help_string, &debug_help_fops); + + orangefs_debug_disabled = 0; + + orangefs_kernel_debug_init(); +} + +/* + * initialize the kernel-debug file. + */ +static void orangefs_kernel_debug_init(void) +{ + static char k_buffer[ORANGEFS_MAX_DEBUG_STRING_LEN] = { }; + + gossip_debug(GOSSIP_DEBUGFS_DEBUG, "%s: start\n", __func__); + + if (strlen(kernel_debug_string) + 1 < ORANGEFS_MAX_DEBUG_STRING_LEN) { + strcpy(k_buffer, kernel_debug_string); + strcat(k_buffer, "\n"); + } else { + strcpy(k_buffer, "none\n"); + pr_info("%s: overflow 1!\n", __func__); + } + + debugfs_create_file(ORANGEFS_KMOD_DEBUG_FILE, 0444, debug_dir, k_buffer, + &kernel_debug_fops); +} + + +void orangefs_debugfs_cleanup(void) +{ + debugfs_remove_recursive(debug_dir); + kfree(debug_help_string); + debug_help_string = NULL; +} + +/* open ORANGEFS_KMOD_DEBUG_HELP_FILE */ +static int orangefs_debug_help_open(struct inode *inode, struct file *file) +{ + int rc = -ENODEV; + int ret; + + gossip_debug(GOSSIP_DEBUGFS_DEBUG, + "orangefs_debug_help_open: start\n"); + + if (orangefs_debug_disabled) + goto out; + + ret = seq_open(file, &help_debug_ops); + if (ret) + goto out; + + ((struct seq_file *)(file->private_data))->private = inode->i_private; + + rc = 0; + +out: + gossip_debug(GOSSIP_DEBUGFS_DEBUG, + "orangefs_debug_help_open: rc:%d:\n", + rc); + return rc; +} + +/* + * I think start always gets called again after stop. Start + * needs to return NULL when it is done. The whole "payload" + * in this case is a single (long) string, so by the second + * time we get to start (pos = 1), we're done. + */ +static void *help_start(struct seq_file *m, loff_t *pos) +{ + void *payload = NULL; + + gossip_debug(GOSSIP_DEBUGFS_DEBUG, "help_start: start\n"); + + mutex_lock(&orangefs_help_file_lock); + + if (*pos == 0) + payload = m->private; + + return payload; +} + +static void *help_next(struct seq_file *m, void *v, loff_t *pos) +{ + (*pos)++; + gossip_debug(GOSSIP_DEBUGFS_DEBUG, "help_next: start\n"); + + return NULL; +} + +static void help_stop(struct seq_file *m, void *p) +{ + gossip_debug(GOSSIP_DEBUGFS_DEBUG, "help_stop: start\n"); + mutex_unlock(&orangefs_help_file_lock); +} + +static int help_show(struct seq_file *m, void *v) +{ + gossip_debug(GOSSIP_DEBUGFS_DEBUG, "help_show: start\n"); + + seq_puts(m, v); + + return 0; +} + +/* + * initialize the client-debug file. + */ +static void orangefs_client_debug_init(void) +{ + + static char c_buffer[ORANGEFS_MAX_DEBUG_STRING_LEN] = { }; + + gossip_debug(GOSSIP_DEBUGFS_DEBUG, "%s: start\n", __func__); + + if (strlen(client_debug_string) + 1 < ORANGEFS_MAX_DEBUG_STRING_LEN) { + strcpy(c_buffer, client_debug_string); + strcat(c_buffer, "\n"); + } else { + strcpy(c_buffer, "none\n"); + pr_info("%s: overflow! 2\n", __func__); + } + + client_debug_dentry = debugfs_create_file(ORANGEFS_CLIENT_DEBUG_FILE, + 0444, + debug_dir, + c_buffer, + &kernel_debug_fops); +} + +/* open ORANGEFS_KMOD_DEBUG_FILE or ORANGEFS_CLIENT_DEBUG_FILE.*/ +static int orangefs_debug_open(struct inode *inode, struct file *file) +{ + int rc = -ENODEV; + + gossip_debug(GOSSIP_DEBUGFS_DEBUG, + "%s: orangefs_debug_disabled: %d\n", + __func__, + orangefs_debug_disabled); + + if (orangefs_debug_disabled) + goto out; + + rc = 0; + mutex_lock(&orangefs_debug_lock); + file->private_data = inode->i_private; + mutex_unlock(&orangefs_debug_lock); + +out: + gossip_debug(GOSSIP_DEBUGFS_DEBUG, + "orangefs_debug_open: rc: %d\n", + rc); + return rc; +} + +static ssize_t orangefs_debug_read(struct file *file, + char __user *ubuf, + size_t count, + loff_t *ppos) +{ + char *buf; + int sprintf_ret; + ssize_t read_ret = -ENOMEM; + + gossip_debug(GOSSIP_DEBUGFS_DEBUG, "orangefs_debug_read: start\n"); + + buf = kmalloc(ORANGEFS_MAX_DEBUG_STRING_LEN, GFP_KERNEL); + if (!buf) + goto out; + + mutex_lock(&orangefs_debug_lock); + sprintf_ret = sprintf(buf, "%s", (char *)file->private_data); + mutex_unlock(&orangefs_debug_lock); + + read_ret = simple_read_from_buffer(ubuf, count, ppos, buf, sprintf_ret); + + kfree(buf); + +out: + gossip_debug(GOSSIP_DEBUGFS_DEBUG, + "orangefs_debug_read: ret: %zu\n", + read_ret); + + return read_ret; +} + +static ssize_t orangefs_debug_write(struct file *file, + const char __user *ubuf, + size_t count, + loff_t *ppos) +{ + char *buf; + int rc = -EFAULT; + size_t silly = 0; + char *debug_string; + struct orangefs_kernel_op_s *new_op = NULL; + struct client_debug_mask c_mask = { NULL, 0, 0 }; + char *s; + + gossip_debug(GOSSIP_DEBUGFS_DEBUG, + "orangefs_debug_write: %pD\n", + file); + + if (count == 0) + return 0; + + /* + * Thwart users who try to jamb a ridiculous number + * of bytes into the debug file... + */ + if (count > ORANGEFS_MAX_DEBUG_STRING_LEN + 1) { + silly = count; + count = ORANGEFS_MAX_DEBUG_STRING_LEN + 1; + } + + buf = kzalloc(ORANGEFS_MAX_DEBUG_STRING_LEN, GFP_KERNEL); + if (!buf) + goto out; + + if (copy_from_user(buf, ubuf, count - 1)) { + gossip_debug(GOSSIP_DEBUGFS_DEBUG, + "%s: copy_from_user failed!\n", + __func__); + goto out; + } + + /* + * Map the keyword string from userspace into a valid debug mask. + * The mapping process involves mapping the human-inputted string + * into a valid mask, and then rebuilding the string from the + * verified valid mask. + * + * A service operation is required to set a new client-side + * debug mask. + */ + if (!strcmp(file->f_path.dentry->d_name.name, + ORANGEFS_KMOD_DEBUG_FILE)) { + debug_string_to_mask(buf, &orangefs_gossip_debug_mask, 0); + debug_mask_to_string(&orangefs_gossip_debug_mask, 0); + debug_string = kernel_debug_string; + gossip_debug(GOSSIP_DEBUGFS_DEBUG, + "New kernel debug string is %s\n", + kernel_debug_string); + } else { + /* Can't reset client debug mask if client is not running. */ + if (is_daemon_in_service()) { + pr_info("%s: Client not running :%d:\n", + __func__, + is_daemon_in_service()); + goto out; + } + + debug_string_to_mask(buf, &c_mask, 1); + debug_mask_to_string(&c_mask, 1); + debug_string = client_debug_string; + + new_op = op_alloc(ORANGEFS_VFS_OP_PARAM); + if (!new_op) { + pr_info("%s: op_alloc failed!\n", __func__); + goto out; + } + + new_op->upcall.req.param.op = + ORANGEFS_PARAM_REQUEST_OP_TWO_MASK_VALUES; + new_op->upcall.req.param.type = ORANGEFS_PARAM_REQUEST_SET; + memset(new_op->upcall.req.param.s_value, + 0, + ORANGEFS_MAX_DEBUG_STRING_LEN); + sprintf(new_op->upcall.req.param.s_value, + "%llx %llx\n", + c_mask.mask1, + c_mask.mask2); + + /* service_operation returns 0 on success... */ + rc = service_operation(new_op, + "orangefs_param", + ORANGEFS_OP_INTERRUPTIBLE); + + if (rc) + gossip_debug(GOSSIP_DEBUGFS_DEBUG, + "%s: service_operation failed! rc:%d:\n", + __func__, + rc); + + op_release(new_op); + } + + mutex_lock(&orangefs_debug_lock); + s = file_inode(file)->i_private; + memset(s, 0, ORANGEFS_MAX_DEBUG_STRING_LEN); + sprintf(s, "%s\n", debug_string); + mutex_unlock(&orangefs_debug_lock); + + *ppos += count; + if (silly) + rc = silly; + else + rc = count; + +out: + gossip_debug(GOSSIP_DEBUGFS_DEBUG, + "orangefs_debug_write: rc: %d\n", + rc); + kfree(buf); + return rc; +} + +/* + * After obtaining a string representation of the client's debug + * keywords and their associated masks, this function is called to build an + * array of these values. + */ +static int orangefs_prepare_cdm_array(char *debug_array_string) +{ + int i; + int rc = -EINVAL; + char *cds_head = NULL; + char *cds_delimiter = NULL; + int keyword_len = 0; + + gossip_debug(GOSSIP_UTILS_DEBUG, "%s: start\n", __func__); + + /* + * figure out how many elements the cdm_array needs. + */ + for (i = 0; i < strlen(debug_array_string); i++) + if (debug_array_string[i] == '\n') + cdm_element_count++; + + if (!cdm_element_count) { + pr_info("No elements in client debug array string!\n"); + goto out; + } + + cdm_array = kcalloc(cdm_element_count, sizeof(*cdm_array), GFP_KERNEL); + if (!cdm_array) { + rc = -ENOMEM; + goto out; + } + + cds_head = debug_array_string; + + for (i = 0; i < cdm_element_count; i++) { + cds_delimiter = strchr(cds_head, '\n'); + *cds_delimiter = '\0'; + + keyword_len = strcspn(cds_head, " "); + + cdm_array[i].keyword = kzalloc(keyword_len + 1, GFP_KERNEL); + if (!cdm_array[i].keyword) { + rc = -ENOMEM; + goto out; + } + + sscanf(cds_head, + "%s %llx %llx", + cdm_array[i].keyword, + (unsigned long long *)&(cdm_array[i].mask1), + (unsigned long long *)&(cdm_array[i].mask2)); + + if (!strcmp(cdm_array[i].keyword, ORANGEFS_VERBOSE)) + client_verbose_index = i; + + if (!strcmp(cdm_array[i].keyword, ORANGEFS_ALL)) + client_all_index = i; + + cds_head = cds_delimiter + 1; + } + + rc = cdm_element_count; + + gossip_debug(GOSSIP_UTILS_DEBUG, "%s: rc:%d:\n", __func__, rc); + +out: + + return rc; + +} + +/* + * /sys/kernel/debug/orangefs/debug-help can be catted to + * see all the available kernel and client debug keywords. + * + * When orangefs.ko initializes, we have no idea what keywords the + * client supports, nor their associated masks. + * + * We pass through this function once at module-load and stamp a + * boilerplate "we don't know" message for the client in the + * debug-help file. We pass through here again when the client + * starts and then we can fill out the debug-help file fully. + * + * The client might be restarted any number of times between + * module reloads, we only build the debug-help file the first time. + */ +int orangefs_prepare_debugfs_help_string(int at_boot) +{ + char *client_title = "Client Debug Keywords:\n"; + char *kernel_title = "Kernel Debug Keywords:\n"; + size_t string_size = DEBUG_HELP_STRING_SIZE; + size_t result_size; + size_t i; + char *new; + int rc = -EINVAL; + + gossip_debug(GOSSIP_UTILS_DEBUG, "%s: start\n", __func__); + + if (at_boot) + client_title = HELP_STRING_UNINITIALIZED; + + /* build a new debug_help_string. */ + new = kzalloc(DEBUG_HELP_STRING_SIZE, GFP_KERNEL); + if (!new) { + rc = -ENOMEM; + goto out; + } + + /* + * strlcat(dst, src, size) will append at most + * "size - strlen(dst) - 1" bytes of src onto dst, + * null terminating the result, and return the total + * length of the string it tried to create. + * + * We'll just plow through here building our new debug + * help string and let strlcat take care of assuring that + * dst doesn't overflow. + */ + strlcat(new, client_title, string_size); + + if (!at_boot) { + + /* + * fill the client keyword/mask array and remember + * how many elements there were. + */ + cdm_element_count = + orangefs_prepare_cdm_array(client_debug_array_string); + if (cdm_element_count <= 0) { + kfree(new); + goto out; + } + + for (i = 0; i < cdm_element_count; i++) { + strlcat(new, "\t", string_size); + strlcat(new, cdm_array[i].keyword, string_size); + strlcat(new, "\n", string_size); + } + } + + strlcat(new, "\n", string_size); + strlcat(new, kernel_title, string_size); + + for (i = 0; i < num_kmod_keyword_mask_map; i++) { + strlcat(new, "\t", string_size); + strlcat(new, s_kmod_keyword_mask_map[i].keyword, string_size); + result_size = strlcat(new, "\n", string_size); + } + + /* See if we tried to put too many bytes into "new"... */ + if (result_size >= string_size) { + kfree(new); + goto out; + } + + if (at_boot) { + debug_help_string = new; + } else { + mutex_lock(&orangefs_help_file_lock); + memset(debug_help_string, 0, DEBUG_HELP_STRING_SIZE); + strlcat(debug_help_string, new, string_size); + mutex_unlock(&orangefs_help_file_lock); + kfree(new); + } + + rc = 0; + +out: return rc; + +} + +/* + * kernel = type 0 + * client = type 1 + */ +static void debug_mask_to_string(void *mask, int type) +{ + int i; + int len = 0; + char *debug_string; + int element_count = 0; + + gossip_debug(GOSSIP_UTILS_DEBUG, "%s: start\n", __func__); + + if (type) { + debug_string = client_debug_string; + element_count = cdm_element_count; + } else { + debug_string = kernel_debug_string; + element_count = num_kmod_keyword_mask_map; + } + + memset(debug_string, 0, ORANGEFS_MAX_DEBUG_STRING_LEN); + + /* + * Some keywords, like "all" or "verbose", are amalgams of + * numerous other keywords. Make a special check for those + * before grinding through the whole mask only to find out + * later... + */ + if (check_amalgam_keyword(mask, type)) + goto out; + + /* Build the debug string. */ + for (i = 0; i < element_count; i++) + if (type) + do_c_string(mask, i); + else + do_k_string(mask, i); + + len = strlen(debug_string); + + if ((len) && (type)) + client_debug_string[len - 1] = '\0'; + else if (len) + kernel_debug_string[len - 1] = '\0'; + else if (type) + strcpy(client_debug_string, "none"); + else + strcpy(kernel_debug_string, "none"); + +out: +gossip_debug(GOSSIP_UTILS_DEBUG, "%s: string:%s:\n", __func__, debug_string); + + return; + +} + +static void do_k_string(void *k_mask, int index) +{ + __u64 *mask = (__u64 *) k_mask; + + if (keyword_is_amalgam((char *) s_kmod_keyword_mask_map[index].keyword)) + goto out; + + if (*mask & s_kmod_keyword_mask_map[index].mask_val) { + if ((strlen(kernel_debug_string) + + strlen(s_kmod_keyword_mask_map[index].keyword)) + < ORANGEFS_MAX_DEBUG_STRING_LEN - 1) { + strcat(kernel_debug_string, + s_kmod_keyword_mask_map[index].keyword); + strcat(kernel_debug_string, ","); + } else { + gossip_err("%s: overflow!\n", __func__); + strcpy(kernel_debug_string, ORANGEFS_ALL); + goto out; + } + } + +out: + + return; +} + +static void do_c_string(void *c_mask, int index) +{ + struct client_debug_mask *mask = (struct client_debug_mask *) c_mask; + + if (keyword_is_amalgam(cdm_array[index].keyword)) + goto out; + + if ((mask->mask1 & cdm_array[index].mask1) || + (mask->mask2 & cdm_array[index].mask2)) { + if ((strlen(client_debug_string) + + strlen(cdm_array[index].keyword) + 1) + < ORANGEFS_MAX_DEBUG_STRING_LEN - 2) { + strcat(client_debug_string, + cdm_array[index].keyword); + strcat(client_debug_string, ","); + } else { + gossip_err("%s: overflow!\n", __func__); + strcpy(client_debug_string, ORANGEFS_ALL); + goto out; + } + } +out: + return; +} + +static int keyword_is_amalgam(char *keyword) +{ + int rc = 0; + + if ((!strcmp(keyword, ORANGEFS_ALL)) || (!strcmp(keyword, ORANGEFS_VERBOSE))) + rc = 1; + + return rc; +} + +/* + * kernel = type 0 + * client = type 1 + * + * return 1 if we found an amalgam. + */ +static int check_amalgam_keyword(void *mask, int type) +{ + __u64 *k_mask; + struct client_debug_mask *c_mask; + int k_all_index = num_kmod_keyword_mask_map - 1; + int rc = 0; + + if (type) { + c_mask = (struct client_debug_mask *) mask; + + if ((c_mask->mask1 == cdm_array[client_all_index].mask1) && + (c_mask->mask2 == cdm_array[client_all_index].mask2)) { + strcpy(client_debug_string, ORANGEFS_ALL); + rc = 1; + goto out; + } + + if ((c_mask->mask1 == cdm_array[client_verbose_index].mask1) && + (c_mask->mask2 == cdm_array[client_verbose_index].mask2)) { + strcpy(client_debug_string, ORANGEFS_VERBOSE); + rc = 1; + goto out; + } + + } else { + k_mask = (__u64 *) mask; + + if (*k_mask >= s_kmod_keyword_mask_map[k_all_index].mask_val) { + strcpy(kernel_debug_string, ORANGEFS_ALL); + rc = 1; + goto out; + } + } + +out: + + return rc; +} + +/* + * kernel = type 0 + * client = type 1 + */ +static void debug_string_to_mask(char *debug_string, void *mask, int type) +{ + char *unchecked_keyword; + int i; + char *strsep_fodder = kstrdup(debug_string, GFP_KERNEL); + char *original_pointer; + int element_count = 0; + struct client_debug_mask *c_mask = NULL; + __u64 *k_mask = NULL; + + gossip_debug(GOSSIP_UTILS_DEBUG, "%s: start\n", __func__); + + if (type) { + c_mask = (struct client_debug_mask *)mask; + element_count = cdm_element_count; + } else { + k_mask = (__u64 *)mask; + *k_mask = 0; + element_count = num_kmod_keyword_mask_map; + } + + original_pointer = strsep_fodder; + while ((unchecked_keyword = strsep(&strsep_fodder, ","))) + if (strlen(unchecked_keyword)) { + for (i = 0; i < element_count; i++) + if (type) + do_c_mask(i, + unchecked_keyword, + &c_mask); + else + do_k_mask(i, + unchecked_keyword, + &k_mask); + } + + kfree(original_pointer); +} + +static void do_c_mask(int i, char *unchecked_keyword, + struct client_debug_mask **sane_mask) +{ + + if (!strcmp(cdm_array[i].keyword, unchecked_keyword)) { + (**sane_mask).mask1 = (**sane_mask).mask1 | cdm_array[i].mask1; + (**sane_mask).mask2 = (**sane_mask).mask2 | cdm_array[i].mask2; + } +} + +static void do_k_mask(int i, char *unchecked_keyword, __u64 **sane_mask) +{ + + if (!strcmp(s_kmod_keyword_mask_map[i].keyword, unchecked_keyword)) + **sane_mask = (**sane_mask) | + s_kmod_keyword_mask_map[i].mask_val; +} + +int orangefs_debugfs_new_client_mask(void __user *arg) +{ + struct dev_mask2_info_s mask2_info = {0}; + int ret; + + ret = copy_from_user(&mask2_info, + (void __user *)arg, + sizeof(struct dev_mask2_info_s)); + + if (ret != 0) + return -EIO; + + client_debug_mask.mask1 = mask2_info.mask1_value; + client_debug_mask.mask2 = mask2_info.mask2_value; + + pr_info("%s: client debug mask has been been received " + ":%llx: :%llx:\n", + __func__, + (unsigned long long)client_debug_mask.mask1, + (unsigned long long)client_debug_mask.mask2); + + return ret; +} + +int orangefs_debugfs_new_client_string(void __user *arg) +{ + int ret; + + ret = copy_from_user(&client_debug_array_string, + (void __user *)arg, + ORANGEFS_MAX_DEBUG_STRING_LEN); + + if (ret != 0) { + pr_info("%s: CLIENT_STRING: copy_from_user failed\n", + __func__); + return -EFAULT; + } + + /* + * The real client-core makes an effort to ensure + * that actual strings that aren't too long to fit in + * this buffer is what we get here. We're going to use + * string functions on the stuff we got, so we'll make + * this extra effort to try and keep from + * flowing out of this buffer when we use the string + * functions, even if somehow the stuff we end up + * with here is garbage. + */ + client_debug_array_string[ORANGEFS_MAX_DEBUG_STRING_LEN - 1] = + '\0'; + + pr_info("%s: client debug array string has been received.\n", + __func__); + + if (!help_string_initialized) { + + /* Build a proper debug help string. */ + ret = orangefs_prepare_debugfs_help_string(0); + if (ret) { + gossip_err("%s: no debug help string \n", + __func__); + return ret; + } + + } + + debug_mask_to_string(&client_debug_mask, 1); + + debugfs_remove(client_debug_dentry); + + orangefs_client_debug_init(); + + help_string_initialized++; + + return 0; +} + +int orangefs_debugfs_new_debug(void __user *arg) +{ + struct dev_mask_info_s mask_info = {0}; + int ret; + + ret = copy_from_user(&mask_info, + (void __user *)arg, + sizeof(mask_info)); + + if (ret != 0) + return -EIO; + + if (mask_info.mask_type == KERNEL_MASK) { + if ((mask_info.mask_value == 0) + && (kernel_mask_set_mod_init)) { + /* + * the kernel debug mask was set when the + * kernel module was loaded; don't override + * it if the client-core was started without + * a value for ORANGEFS_KMODMASK. + */ + return 0; + } + debug_mask_to_string(&mask_info.mask_value, + mask_info.mask_type); + orangefs_gossip_debug_mask = mask_info.mask_value; + pr_info("%s: kernel debug mask has been modified to " + ":%s: :%llx:\n", + __func__, + kernel_debug_string, + (unsigned long long)orangefs_gossip_debug_mask); + } else if (mask_info.mask_type == CLIENT_MASK) { + debug_mask_to_string(&mask_info.mask_value, + mask_info.mask_type); + pr_info("%s: client debug mask has been modified to" + ":%s: :%llx:\n", + __func__, + client_debug_string, + llu(mask_info.mask_value)); + } else { + gossip_err("Invalid mask type....\n"); + return -EINVAL; + } + + return ret; +} -- cgit v1.2.3