[B.A.T.M.A.N.] [PATCH 11/17] Staging: batman-adv: splitting /proc vis file into vis_server and vis_data

From: Marek Lindner lindner_marek@yahoo.de

The /proc vis file was used to enable/disable the vis server and to output the vis data at the same time. This behaviour was confusing and lacked a proper method to display the current vis server status. This patch seperates the 2 functionalities: * use vis_server to enable/disable the vis server and to retrieve its status * use vis_data to retrieve the vis raw data (if the server is enabled)

Signed-off-by: Marek Lindner lindner_marek@yahoo.de Signed-off-by: Andrew Lunn andrew@lunn.ch --- drivers/staging/batman-adv/proc.c | 172 +++++++++++++++--------------------- drivers/staging/batman-adv/proc.h | 4 +- drivers/staging/batman-adv/types.h | 10 ++ drivers/staging/batman-adv/vis.c | 62 +++++++++++++ drivers/staging/batman-adv/vis.h | 6 ++ 5 files changed, 151 insertions(+), 103 deletions(-)

diff --git a/drivers/staging/batman-adv/proc.c b/drivers/staging/batman-adv/proc.c index f1adf57..d9fde94 100644 --- a/drivers/staging/batman-adv/proc.c +++ b/drivers/staging/batman-adv/proc.c @@ -33,7 +33,7 @@ static struct proc_dir_entry *proc_batman_dir, *proc_interface_file; static struct proc_dir_entry *proc_orig_interval_file, *proc_originators_file; static struct proc_dir_entry *proc_transt_local_file; static struct proc_dir_entry *proc_transt_global_file; -static struct proc_dir_entry *proc_vis_file; +static struct proc_dir_entry *proc_vis_srv_file, *proc_vis_data_file; static struct proc_dir_entry *proc_aggr_file;

static int proc_interfaces_read(struct seq_file *seq, void *offset) @@ -320,79 +320,55 @@ static int proc_transt_global_open(struct inode *inode, struct file *file) return single_open(file, proc_transt_global_read, NULL); }

-/* While scanning for vis-entries of a particular vis-originator - * this list collects its interfaces to create a subgraph/cluster - * out of them later - */ -struct if_list_entry { - uint8_t addr[ETH_ALEN]; - bool primary; - struct hlist_node list; -}; - -/* insert interface to the list of interfaces of one originator, if it - * does not already exist in the list */ -static void proc_vis_insert_interface(const uint8_t *interface, - struct hlist_head *if_list, - bool primary) +/* setting the mode of the vis server by the user */ +static ssize_t proc_vis_srv_write(struct file *file, const char __user * buffer, + size_t count, loff_t *ppos) { - struct if_list_entry *entry; - struct hlist_node *pos; + char *vis_mode_string; + int not_copied = 0;

- hlist_for_each_entry(entry, pos, if_list, list) { - if (compare_orig(entry->addr, (void *)interface)) - return; - } + vis_mode_string = kmalloc(count, GFP_KERNEL);

- /* its a new address, add it to the list */ - entry = kmalloc(sizeof(*entry), GFP_KERNEL); - if (!entry) - return; - memcpy(entry->addr, interface, ETH_ALEN); - entry->primary = primary; - hlist_add_head(&entry->list, if_list); + if (!vis_mode_string) + return -ENOMEM; + + not_copied = copy_from_user(vis_mode_string, buffer, count); + vis_mode_string[count - not_copied - 1] = 0; + + if ((strcmp(vis_mode_string, "client") == 0) || + (strcmp(vis_mode_string, "disabled") == 0)) { + printk(KERN_INFO "batman-adv:Setting VIS mode to client (disabling vis server)\n"); + vis_set_mode(VIS_TYPE_CLIENT_UPDATE); + } else if ((strcmp(vis_mode_string, "server") == 0) || + (strcmp(vis_mode_string, "enabled") == 0)) { + printk(KERN_INFO "batman-adv:Setting VIS mode to server (enabling vis server)\n"); + vis_set_mode(VIS_TYPE_SERVER_SYNC); + } else + printk(KERN_ERR "batman-adv:Unknown VIS mode: %s\n", + vis_mode_string); + + kfree(vis_mode_string); + return count; }

-static void proc_vis_read_prim_sec(struct seq_file *seq, - struct hlist_head *if_list) +static int proc_vis_srv_read(struct seq_file *seq, void *offset) { - struct if_list_entry *entry; - struct hlist_node *pos, *n; - char tmp_addr_str[ETH_STR_LEN]; + int vis_server = is_vis_server();

- hlist_for_each_entry_safe(entry, pos, n, if_list, list) { - if (entry->primary) { - seq_printf(seq, "PRIMARY, "); - } else { - addr_to_string(tmp_addr_str, entry->addr); - seq_printf(seq, "SEC %s, ", tmp_addr_str); - } + seq_printf(seq, "[%c] client mode (server disabled) \n", + (!vis_server) ? 'x' : ' '); + seq_printf(seq, "[%c] server mode (server enabled) \n", + (vis_server) ? 'x' : ' ');

- hlist_del(&entry->list); - kfree(entry); - } + return 0; }

-/* read an entry */ -static void proc_vis_read_entry(struct seq_file *seq, - struct vis_info_entry *entry, - struct hlist_head *if_list, - uint8_t *vis_orig) +static int proc_vis_srv_open(struct inode *inode, struct file *file) { - char to[40]; - - addr_to_string(to, entry->dest); - if (entry->quality == 0) { - proc_vis_insert_interface(vis_orig, if_list, true); - seq_printf(seq, "HNA %s, ", to); - } else { - proc_vis_insert_interface(entry->src, if_list, - compare_orig(entry->src, vis_orig)); - seq_printf(seq, "TQ %s %d, ", to, entry->quality); - } + return single_open(file, proc_vis_srv_read, NULL); }

-static int proc_vis_read(struct seq_file *seq, void *offset) +static int proc_vis_data_read(struct seq_file *seq, void *offset) { HASHIT(hashit); struct vis_info *info; @@ -432,38 +408,9 @@ end: return 0; }

-/* setting the mode of the vis server by the user */ -static ssize_t proc_vis_write(struct file *file, const char __user * buffer, - size_t count, loff_t *ppos) +static int proc_vis_data_open(struct inode *inode, struct file *file) { - char *vis_mode_string; - int not_copied = 0; - - vis_mode_string = kmalloc(count, GFP_KERNEL); - - if (!vis_mode_string) - return -ENOMEM; - - not_copied = copy_from_user(vis_mode_string, buffer, count); - vis_mode_string[count - not_copied - 1] = 0; - - if (strcmp(vis_mode_string, "client") == 0) { - printk(KERN_INFO "batman-adv:Setting VIS mode to client\n"); - vis_set_mode(VIS_TYPE_CLIENT_UPDATE); - } else if (strcmp(vis_mode_string, "server") == 0) { - printk(KERN_INFO "batman-adv:Setting VIS mode to server\n"); - vis_set_mode(VIS_TYPE_SERVER_SYNC); - } else - printk(KERN_ERR "batman-adv:Unknown VIS mode: %s\n", - vis_mode_string); - - kfree(vis_mode_string); - return count; -} - -static int proc_vis_open(struct inode *inode, struct file *file) -{ - return single_open(file, proc_vis_read, NULL); + return single_open(file, proc_vis_data_read, NULL); }

static int proc_aggr_read(struct seq_file *seq, void *offset) @@ -529,11 +476,20 @@ static const struct file_operations proc_aggr_fops = { .release = single_release, };

-static const struct file_operations proc_vis_fops = { +static const struct file_operations proc_vis_srv_fops = { .owner = THIS_MODULE, - .open = proc_vis_open, + .open = proc_vis_srv_open, .read = seq_read, - .write = proc_vis_write, + .write = proc_vis_srv_write, + .llseek = seq_lseek, + .release = single_release, +}; + +static const struct file_operations proc_vis_data_fops = { + .owner = THIS_MODULE, + .open = proc_vis_data_open, + .read = seq_read, + .write = proc_dummy_write, .llseek = seq_lseek, .release = single_release, }; @@ -600,8 +556,11 @@ void cleanup_procfs(void) if (proc_interface_file) remove_proc_entry(PROC_FILE_INTERFACES, proc_batman_dir);

- if (proc_vis_file) - remove_proc_entry(PROC_FILE_VIS, proc_batman_dir); + if (proc_vis_data_file) + remove_proc_entry(PROC_FILE_VIS_DATA, proc_batman_dir); + + if (proc_vis_srv_file) + remove_proc_entry(PROC_FILE_VIS_SRV, proc_batman_dir);

if (proc_aggr_file) remove_proc_entry(PROC_FILE_AGGR, proc_batman_dir); @@ -679,12 +638,23 @@ int setup_procfs(void) return -EFAULT; }

- proc_vis_file = create_proc_entry(PROC_FILE_VIS, S_IWUSR | S_IRUGO, + proc_vis_srv_file = create_proc_entry(PROC_FILE_VIS_SRV, + S_IWUSR | S_IRUGO, + proc_batman_dir); + if (proc_vis_srv_file) { + proc_vis_srv_file->proc_fops = &proc_vis_srv_fops; + } else { + printk(KERN_ERR "batman-adv: Registering the '/proc/net/%s/%s' file failed\n", PROC_ROOT_DIR, PROC_FILE_VIS_SRV); + cleanup_procfs(); + return -EFAULT; + } + + proc_vis_data_file = create_proc_entry(PROC_FILE_VIS_DATA, S_IRUGO, proc_batman_dir); - if (proc_vis_file) { - proc_vis_file->proc_fops = &proc_vis_fops; + if (proc_vis_data_file) { + proc_vis_data_file->proc_fops = &proc_vis_data_fops; } else { - printk(KERN_ERR "batman-adv: Registering the '/proc/net/%s/%s' file failed\n", PROC_ROOT_DIR, PROC_FILE_VIS); + printk(KERN_ERR "batman-adv: Registering the '/proc/net/%s/%s' file failed\n", PROC_ROOT_DIR, PROC_FILE_VIS_DATA); cleanup_procfs(); return -EFAULT; } diff --git a/drivers/staging/batman-adv/proc.h b/drivers/staging/batman-adv/proc.h index 761c5f8..cd690e0 100644 --- a/drivers/staging/batman-adv/proc.h +++ b/drivers/staging/batman-adv/proc.h @@ -31,8 +31,8 @@ #define PROC_FILE_LOG_LEVEL "log_level" #define PROC_FILE_TRANST_LOCAL "transtable_local" #define PROC_FILE_TRANST_GLOBAL "transtable_global" -#define PROC_FILE_VIS "vis" -#define PROC_FILE_VIS_FORMAT "vis_format" +#define PROC_FILE_VIS_SRV "vis_server" +#define PROC_FILE_VIS_DATA "vis_data" #define PROC_FILE_AGGR "aggregate_ogm"

void cleanup_procfs(void); diff --git a/drivers/staging/batman-adv/types.h b/drivers/staging/batman-adv/types.h index 9739358..d708e6f 100644 --- a/drivers/staging/batman-adv/types.h +++ b/drivers/staging/batman-adv/types.h @@ -121,4 +121,14 @@ struct forw_packet { /* structure for forw_list maintaining packet struct batman_if *if_incoming; };

+/* While scanning for vis-entries of a particular vis-originator + * this list collects its interfaces to create a subgraph/cluster + * out of them later + */ +struct if_list_entry { + uint8_t addr[ETH_ALEN]; + bool primary; + struct hlist_node list; +}; + #endif diff --git a/drivers/staging/batman-adv/vis.c b/drivers/staging/batman-adv/vis.c index 0eb23d2..3c66645 100644 --- a/drivers/staging/batman-adv/vis.c +++ b/drivers/staging/batman-adv/vis.c @@ -114,6 +114,68 @@ static int vis_info_choose(void *data, int size) return hash % size; }

+/* insert interface to the list of interfaces of one originator, if it + * does not already exist in the list */ +static void proc_vis_insert_interface(const uint8_t *interface, + struct hlist_head *if_list, + bool primary) +{ + struct if_list_entry *entry; + struct hlist_node *pos; + + hlist_for_each_entry(entry, pos, if_list, list) { + if (compare_orig(entry->addr, (void *)interface)) + return; + } + + /* its a new address, add it to the list */ + entry = kmalloc(sizeof(*entry), GFP_KERNEL); + if (!entry) + return; + memcpy(entry->addr, interface, ETH_ALEN); + entry->primary = primary; + hlist_add_head(&entry->list, if_list); +} + +void proc_vis_read_prim_sec(struct seq_file *seq, + struct hlist_head *if_list) +{ + struct if_list_entry *entry; + struct hlist_node *pos, *n; + char tmp_addr_str[ETH_STR_LEN]; + + hlist_for_each_entry_safe(entry, pos, n, if_list, list) { + if (entry->primary) { + seq_printf(seq, "PRIMARY, "); + } else { + addr_to_string(tmp_addr_str, entry->addr); + seq_printf(seq, "SEC %s, ", tmp_addr_str); + } + + hlist_del(&entry->list); + kfree(entry); + } +} + +/* read an entry */ +void proc_vis_read_entry(struct seq_file *seq, + struct vis_info_entry *entry, + struct hlist_head *if_list, + uint8_t *vis_orig) +{ + char to[40]; + + addr_to_string(to, entry->dest); + if (entry->quality == 0) { + proc_vis_insert_interface(vis_orig, if_list, true); + seq_printf(seq, "HNA %s, ", to); + } else { + proc_vis_insert_interface(entry->src, if_list, + compare_orig(entry->src, vis_orig)); + seq_printf(seq, "TQ %s %d, ", to, entry->quality); + } +} + /* tries to add one entry to the receive list. */ static void recv_list_add(struct list_head *recv_list, char *mac) { diff --git a/drivers/staging/batman-adv/vis.h b/drivers/staging/batman-adv/vis.h index ff88a43..2e24258 100644 --- a/drivers/staging/batman-adv/vis.h +++ b/drivers/staging/batman-adv/vis.h @@ -50,6 +50,12 @@ extern spinlock_t vis_hash_lock;

void vis_set_mode(int mode); int is_vis_server(void); +void proc_vis_read_entry(struct seq_file *seq, + struct vis_info_entry *entry, + struct hlist_head *if_list, + uint8_t *vis_orig); +void proc_vis_read_prim_sec(struct seq_file *seq, + struct hlist_head *if_list); void receive_server_sync_packet(struct vis_packet *vis_packet, int vis_info_len); void receive_client_update_packet(struct vis_packet *vis_packet,