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-rw-r--r--net/can/proc.c417
1 files changed, 232 insertions, 185 deletions
diff --git a/net/can/proc.c b/net/can/proc.c
index 520fef5e539..1a19b985a86 100644
--- a/net/can/proc.c
+++ b/net/can/proc.c
@@ -37,14 +37,13 @@
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*
- * Send feedback to <socketcan-users@lists.berlios.de>
- *
*/
#include <linux/module.h>
#include <linux/proc_fs.h>
#include <linux/list.h>
#include <linux/rcupdate.h>
+#include <linux/if_arp.h>
#include <linux/can/core.h>
#include "af_can.h"
@@ -81,7 +80,6 @@ static const char rx_list_name[][8] = {
[RX_ALL] = "rx_all",
[RX_FIL] = "rx_fil",
[RX_INV] = "rx_inv",
- [RX_EFF] = "rx_eff",
};
/*
@@ -190,269 +188,320 @@ void can_stat_update(unsigned long data)
/*
* proc read functions
- *
- * From known use-cases we expect about 10 entries in a receive list to be
- * printed in the proc_fs. So PAGE_SIZE is definitely enough space here.
- *
*/
-static int can_print_rcvlist(char *page, int len, struct hlist_head *rx_list,
- struct net_device *dev)
+static void can_print_rcvlist(struct seq_file *m, struct hlist_head *rx_list,
+ struct net_device *dev)
{
struct receiver *r;
- struct hlist_node *n;
- rcu_read_lock();
- hlist_for_each_entry_rcu(r, n, rx_list, list) {
+ hlist_for_each_entry_rcu(r, rx_list, list) {
char *fmt = (r->can_id & CAN_EFF_FLAG)?
- " %-5s %08X %08x %08x %08x %8ld %s\n" :
- " %-5s %03X %08x %08lx %08lx %8ld %s\n";
-
- len += snprintf(page + len, PAGE_SIZE - len, fmt,
- DNAME(dev), r->can_id, r->mask,
- (unsigned long)r->func, (unsigned long)r->data,
- r->matches, r->ident);
+ " %-5s %08x %08x %pK %pK %8ld %s\n" :
+ " %-5s %03x %08x %pK %pK %8ld %s\n";
- /* does a typical line fit into the current buffer? */
-
- /* 100 Bytes before end of buffer */
- if (len > PAGE_SIZE - 100) {
- /* mark output cut off */
- len += snprintf(page + len, PAGE_SIZE - len,
- " (..)\n");
- break;
- }
+ seq_printf(m, fmt, DNAME(dev), r->can_id, r->mask,
+ r->func, r->data, r->matches, r->ident);
}
- rcu_read_unlock();
-
- return len;
}
-static int can_print_recv_banner(char *page, int len)
+static void can_print_recv_banner(struct seq_file *m)
{
/*
* can1. 00000000 00000000 00000000
* ....... 0 tp20
*/
- len += snprintf(page + len, PAGE_SIZE - len,
- " device can_id can_mask function"
+ seq_puts(m, " device can_id can_mask function"
" userdata matches ident\n");
-
- return len;
}
-static int can_proc_read_stats(char *page, char **start, off_t off,
- int count, int *eof, void *data)
+static int can_stats_proc_show(struct seq_file *m, void *v)
{
- int len = 0;
-
- len += snprintf(page + len, PAGE_SIZE - len, "\n");
- len += snprintf(page + len, PAGE_SIZE - len,
- " %8ld transmitted frames (TXF)\n",
- can_stats.tx_frames);
- len += snprintf(page + len, PAGE_SIZE - len,
- " %8ld received frames (RXF)\n", can_stats.rx_frames);
- len += snprintf(page + len, PAGE_SIZE - len,
- " %8ld matched frames (RXMF)\n", can_stats.matches);
+ seq_putc(m, '\n');
+ seq_printf(m, " %8ld transmitted frames (TXF)\n", can_stats.tx_frames);
+ seq_printf(m, " %8ld received frames (RXF)\n", can_stats.rx_frames);
+ seq_printf(m, " %8ld matched frames (RXMF)\n", can_stats.matches);
- len += snprintf(page + len, PAGE_SIZE - len, "\n");
+ seq_putc(m, '\n');
if (can_stattimer.function == can_stat_update) {
- len += snprintf(page + len, PAGE_SIZE - len,
- " %8ld %% total match ratio (RXMR)\n",
+ seq_printf(m, " %8ld %% total match ratio (RXMR)\n",
can_stats.total_rx_match_ratio);
- len += snprintf(page + len, PAGE_SIZE - len,
- " %8ld frames/s total tx rate (TXR)\n",
+ seq_printf(m, " %8ld frames/s total tx rate (TXR)\n",
can_stats.total_tx_rate);
- len += snprintf(page + len, PAGE_SIZE - len,
- " %8ld frames/s total rx rate (RXR)\n",
+ seq_printf(m, " %8ld frames/s total rx rate (RXR)\n",
can_stats.total_rx_rate);
- len += snprintf(page + len, PAGE_SIZE - len, "\n");
+ seq_putc(m, '\n');
- len += snprintf(page + len, PAGE_SIZE - len,
- " %8ld %% current match ratio (CRXMR)\n",
+ seq_printf(m, " %8ld %% current match ratio (CRXMR)\n",
can_stats.current_rx_match_ratio);
- len += snprintf(page + len, PAGE_SIZE - len,
- " %8ld frames/s current tx rate (CTXR)\n",
+ seq_printf(m, " %8ld frames/s current tx rate (CTXR)\n",
can_stats.current_tx_rate);
- len += snprintf(page + len, PAGE_SIZE - len,
- " %8ld frames/s current rx rate (CRXR)\n",
+ seq_printf(m, " %8ld frames/s current rx rate (CRXR)\n",
can_stats.current_rx_rate);
- len += snprintf(page + len, PAGE_SIZE - len, "\n");
+ seq_putc(m, '\n');
- len += snprintf(page + len, PAGE_SIZE - len,
- " %8ld %% max match ratio (MRXMR)\n",
+ seq_printf(m, " %8ld %% max match ratio (MRXMR)\n",
can_stats.max_rx_match_ratio);
- len += snprintf(page + len, PAGE_SIZE - len,
- " %8ld frames/s max tx rate (MTXR)\n",
+ seq_printf(m, " %8ld frames/s max tx rate (MTXR)\n",
can_stats.max_tx_rate);
- len += snprintf(page + len, PAGE_SIZE - len,
- " %8ld frames/s max rx rate (MRXR)\n",
+ seq_printf(m, " %8ld frames/s max rx rate (MRXR)\n",
can_stats.max_rx_rate);
- len += snprintf(page + len, PAGE_SIZE - len, "\n");
+ seq_putc(m, '\n');
}
- len += snprintf(page + len, PAGE_SIZE - len,
- " %8ld current receive list entries (CRCV)\n",
+ seq_printf(m, " %8ld current receive list entries (CRCV)\n",
can_pstats.rcv_entries);
- len += snprintf(page + len, PAGE_SIZE - len,
- " %8ld maximum receive list entries (MRCV)\n",
+ seq_printf(m, " %8ld maximum receive list entries (MRCV)\n",
can_pstats.rcv_entries_max);
if (can_pstats.stats_reset)
- len += snprintf(page + len, PAGE_SIZE - len,
- "\n %8ld statistic resets (STR)\n",
+ seq_printf(m, "\n %8ld statistic resets (STR)\n",
can_pstats.stats_reset);
if (can_pstats.user_reset)
- len += snprintf(page + len, PAGE_SIZE - len,
- " %8ld user statistic resets (USTR)\n",
+ seq_printf(m, " %8ld user statistic resets (USTR)\n",
can_pstats.user_reset);
- len += snprintf(page + len, PAGE_SIZE - len, "\n");
-
- *eof = 1;
- return len;
+ seq_putc(m, '\n');
+ return 0;
}
-static int can_proc_read_reset_stats(char *page, char **start, off_t off,
- int count, int *eof, void *data)
+static int can_stats_proc_open(struct inode *inode, struct file *file)
{
- int len = 0;
+ return single_open(file, can_stats_proc_show, NULL);
+}
+
+static const struct file_operations can_stats_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = can_stats_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+static int can_reset_stats_proc_show(struct seq_file *m, void *v)
+{
user_reset = 1;
if (can_stattimer.function == can_stat_update) {
- len += snprintf(page + len, PAGE_SIZE - len,
- "Scheduled statistic reset #%ld.\n",
+ seq_printf(m, "Scheduled statistic reset #%ld.\n",
can_pstats.stats_reset + 1);
} else {
if (can_stats.jiffies_init != jiffies)
can_init_stats();
- len += snprintf(page + len, PAGE_SIZE - len,
- "Performed statistic reset #%ld.\n",
+ seq_printf(m, "Performed statistic reset #%ld.\n",
can_pstats.stats_reset);
}
+ return 0;
+}
- *eof = 1;
- return len;
+static int can_reset_stats_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, can_reset_stats_proc_show, NULL);
}
-static int can_proc_read_version(char *page, char **start, off_t off,
- int count, int *eof, void *data)
+static const struct file_operations can_reset_stats_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = can_reset_stats_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int can_version_proc_show(struct seq_file *m, void *v)
+{
+ seq_printf(m, "%s\n", CAN_VERSION_STRING);
+ return 0;
+}
+
+static int can_version_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, can_version_proc_show, NULL);
+}
+
+static const struct file_operations can_version_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = can_version_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static inline void can_rcvlist_proc_show_one(struct seq_file *m, int idx,
+ struct net_device *dev,
+ struct dev_rcv_lists *d)
{
- int len = 0;
+ if (!hlist_empty(&d->rx[idx])) {
+ can_print_recv_banner(m);
+ can_print_rcvlist(m, &d->rx[idx], dev);
+ } else
+ seq_printf(m, " (%s: no entry)\n", DNAME(dev));
- len += snprintf(page + len, PAGE_SIZE - len, "%s\n",
- CAN_VERSION_STRING);
- *eof = 1;
- return len;
}
-static int can_proc_read_rcvlist(char *page, char **start, off_t off,
- int count, int *eof, void *data)
+static int can_rcvlist_proc_show(struct seq_file *m, void *v)
{
/* double cast to prevent GCC warning */
- int idx = (int)(long)data;
- int len = 0;
+ int idx = (int)(long)m->private;
+ struct net_device *dev;
struct dev_rcv_lists *d;
- struct hlist_node *n;
- len += snprintf(page + len, PAGE_SIZE - len,
- "\nreceive list '%s':\n", rx_list_name[idx]);
+ seq_printf(m, "\nreceive list '%s':\n", rx_list_name[idx]);
rcu_read_lock();
- hlist_for_each_entry_rcu(d, n, &can_rx_dev_list, list) {
- if (!hlist_empty(&d->rx[idx])) {
- len = can_print_recv_banner(page, len);
- len = can_print_rcvlist(page, len, &d->rx[idx], d->dev);
- } else
- len += snprintf(page + len, PAGE_SIZE - len,
- " (%s: no entry)\n", DNAME(d->dev));
+ /* receive list for 'all' CAN devices (dev == NULL) */
+ d = &can_rx_alldev_list;
+ can_rcvlist_proc_show_one(m, idx, NULL, d);
- /* exit on end of buffer? */
- if (len > PAGE_SIZE - 100)
- break;
+ /* receive list for registered CAN devices */
+ for_each_netdev_rcu(&init_net, dev) {
+ if (dev->type == ARPHRD_CAN && dev->ml_priv)
+ can_rcvlist_proc_show_one(m, idx, dev, dev->ml_priv);
}
+
rcu_read_unlock();
- len += snprintf(page + len, PAGE_SIZE - len, "\n");
+ seq_putc(m, '\n');
+ return 0;
+}
- *eof = 1;
- return len;
+static int can_rcvlist_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, can_rcvlist_proc_show, PDE_DATA(inode));
}
-static int can_proc_read_rcvlist_sff(char *page, char **start, off_t off,
- int count, int *eof, void *data)
+static const struct file_operations can_rcvlist_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = can_rcvlist_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static inline void can_rcvlist_proc_show_array(struct seq_file *m,
+ struct net_device *dev,
+ struct hlist_head *rcv_array,
+ unsigned int rcv_array_sz)
{
- int len = 0;
+ unsigned int i;
+ int all_empty = 1;
+
+ /* check whether at least one list is non-empty */
+ for (i = 0; i < rcv_array_sz; i++)
+ if (!hlist_empty(&rcv_array[i])) {
+ all_empty = 0;
+ break;
+ }
+
+ if (!all_empty) {
+ can_print_recv_banner(m);
+ for (i = 0; i < rcv_array_sz; i++) {
+ if (!hlist_empty(&rcv_array[i]))
+ can_print_rcvlist(m, &rcv_array[i], dev);
+ }
+ } else
+ seq_printf(m, " (%s: no entry)\n", DNAME(dev));
+}
+
+static int can_rcvlist_sff_proc_show(struct seq_file *m, void *v)
+{
+ struct net_device *dev;
struct dev_rcv_lists *d;
- struct hlist_node *n;
/* RX_SFF */
- len += snprintf(page + len, PAGE_SIZE - len,
- "\nreceive list 'rx_sff':\n");
+ seq_puts(m, "\nreceive list 'rx_sff':\n");
rcu_read_lock();
- hlist_for_each_entry_rcu(d, n, &can_rx_dev_list, list) {
- int i, all_empty = 1;
- /* check wether at least one list is non-empty */
- for (i = 0; i < 0x800; i++)
- if (!hlist_empty(&d->rx_sff[i])) {
- all_empty = 0;
- break;
- }
-
- if (!all_empty) {
- len = can_print_recv_banner(page, len);
- for (i = 0; i < 0x800; i++) {
- if (!hlist_empty(&d->rx_sff[i]) &&
- len < PAGE_SIZE - 100)
- len = can_print_rcvlist(page, len,
- &d->rx_sff[i],
- d->dev);
- }
- } else
- len += snprintf(page + len, PAGE_SIZE - len,
- " (%s: no entry)\n", DNAME(d->dev));
-
- /* exit on end of buffer? */
- if (len > PAGE_SIZE - 100)
- break;
+
+ /* sff receive list for 'all' CAN devices (dev == NULL) */
+ d = &can_rx_alldev_list;
+ can_rcvlist_proc_show_array(m, NULL, d->rx_sff, ARRAY_SIZE(d->rx_sff));
+
+ /* sff receive list for registered CAN devices */
+ for_each_netdev_rcu(&init_net, dev) {
+ if (dev->type == ARPHRD_CAN && dev->ml_priv) {
+ d = dev->ml_priv;
+ can_rcvlist_proc_show_array(m, dev, d->rx_sff,
+ ARRAY_SIZE(d->rx_sff));
+ }
}
+
rcu_read_unlock();
- len += snprintf(page + len, PAGE_SIZE - len, "\n");
+ seq_putc(m, '\n');
+ return 0;
+}
- *eof = 1;
- return len;
+static int can_rcvlist_sff_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, can_rcvlist_sff_proc_show, NULL);
}
-/*
- * proc utility functions
- */
+static const struct file_operations can_rcvlist_sff_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = can_rcvlist_sff_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
-static struct proc_dir_entry *can_create_proc_readentry(const char *name,
- mode_t mode,
- read_proc_t *read_proc,
- void *data)
+
+static int can_rcvlist_eff_proc_show(struct seq_file *m, void *v)
{
- if (can_dir)
- return create_proc_read_entry(name, mode, can_dir, read_proc,
- data);
- else
- return NULL;
+ struct net_device *dev;
+ struct dev_rcv_lists *d;
+
+ /* RX_EFF */
+ seq_puts(m, "\nreceive list 'rx_eff':\n");
+
+ rcu_read_lock();
+
+ /* eff receive list for 'all' CAN devices (dev == NULL) */
+ d = &can_rx_alldev_list;
+ can_rcvlist_proc_show_array(m, NULL, d->rx_eff, ARRAY_SIZE(d->rx_eff));
+
+ /* eff receive list for registered CAN devices */
+ for_each_netdev_rcu(&init_net, dev) {
+ if (dev->type == ARPHRD_CAN && dev->ml_priv) {
+ d = dev->ml_priv;
+ can_rcvlist_proc_show_array(m, dev, d->rx_eff,
+ ARRAY_SIZE(d->rx_eff));
+ }
+ }
+
+ rcu_read_unlock();
+
+ seq_putc(m, '\n');
+ return 0;
}
+static int can_rcvlist_eff_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, can_rcvlist_eff_proc_show, NULL);
+}
+
+static const struct file_operations can_rcvlist_eff_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = can_rcvlist_eff_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+/*
+ * proc utility functions
+ */
+
static void can_remove_proc_readentry(const char *name)
{
if (can_dir)
@@ -473,27 +522,25 @@ void can_init_proc(void)
return;
}
- can_dir->owner = THIS_MODULE;
-
/* own procfs entries from the AF_CAN core */
- pde_version = can_create_proc_readentry(CAN_PROC_VERSION, 0644,
- can_proc_read_version, NULL);
- pde_stats = can_create_proc_readentry(CAN_PROC_STATS, 0644,
- can_proc_read_stats, NULL);
- pde_reset_stats = can_create_proc_readentry(CAN_PROC_RESET_STATS, 0644,
- can_proc_read_reset_stats, NULL);
- pde_rcvlist_err = can_create_proc_readentry(CAN_PROC_RCVLIST_ERR, 0644,
- can_proc_read_rcvlist, (void *)RX_ERR);
- pde_rcvlist_all = can_create_proc_readentry(CAN_PROC_RCVLIST_ALL, 0644,
- can_proc_read_rcvlist, (void *)RX_ALL);
- pde_rcvlist_fil = can_create_proc_readentry(CAN_PROC_RCVLIST_FIL, 0644,
- can_proc_read_rcvlist, (void *)RX_FIL);
- pde_rcvlist_inv = can_create_proc_readentry(CAN_PROC_RCVLIST_INV, 0644,
- can_proc_read_rcvlist, (void *)RX_INV);
- pde_rcvlist_eff = can_create_proc_readentry(CAN_PROC_RCVLIST_EFF, 0644,
- can_proc_read_rcvlist, (void *)RX_EFF);
- pde_rcvlist_sff = can_create_proc_readentry(CAN_PROC_RCVLIST_SFF, 0644,
- can_proc_read_rcvlist_sff, NULL);
+ pde_version = proc_create(CAN_PROC_VERSION, 0644, can_dir,
+ &can_version_proc_fops);
+ pde_stats = proc_create(CAN_PROC_STATS, 0644, can_dir,
+ &can_stats_proc_fops);
+ pde_reset_stats = proc_create(CAN_PROC_RESET_STATS, 0644, can_dir,
+ &can_reset_stats_proc_fops);
+ pde_rcvlist_err = proc_create_data(CAN_PROC_RCVLIST_ERR, 0644, can_dir,
+ &can_rcvlist_proc_fops, (void *)RX_ERR);
+ pde_rcvlist_all = proc_create_data(CAN_PROC_RCVLIST_ALL, 0644, can_dir,
+ &can_rcvlist_proc_fops, (void *)RX_ALL);
+ pde_rcvlist_fil = proc_create_data(CAN_PROC_RCVLIST_FIL, 0644, can_dir,
+ &can_rcvlist_proc_fops, (void *)RX_FIL);
+ pde_rcvlist_inv = proc_create_data(CAN_PROC_RCVLIST_INV, 0644, can_dir,
+ &can_rcvlist_proc_fops, (void *)RX_INV);
+ pde_rcvlist_eff = proc_create(CAN_PROC_RCVLIST_EFF, 0644, can_dir,
+ &can_rcvlist_eff_proc_fops);
+ pde_rcvlist_sff = proc_create(CAN_PROC_RCVLIST_SFF, 0644, can_dir,
+ &can_rcvlist_sff_proc_fops);
}
/*
@@ -529,5 +576,5 @@ void can_remove_proc(void)
can_remove_proc_readentry(CAN_PROC_RCVLIST_SFF);
if (can_dir)
- proc_net_remove(&init_net, "can");
+ remove_proc_entry("can", init_net.proc_net);
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-10 01:57:30 +0000