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authorBen Greear <greearb@candelatech.com>2016-12-05 10:58:30 -0800
committerJohannes Berg <johannes.berg@intel.com>2016-12-13 16:05:12 +0100
commit4a5eccaa93505cd186939a01d7c115568b1881a6 (patch)
tree85095ce04aaefef742c951a4b39e0d72a55d8f8d /net/mac80211/debugfs.c
parent11197d006bcfabf0173a7820a163fcaac420d10e (diff)
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mac80211: Show pending txqlen in debugfs.
Could be useful for debugging memory consumption issues, and perhaps power-save as well. Signed-off-by: Ben Greear <greearb@candelatech.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211/debugfs.c')
-rw-r--r--net/mac80211/debugfs.c27
1 files changed, 27 insertions, 0 deletions
diff --git a/net/mac80211/debugfs.c b/net/mac80211/debugfs.c
index e02ba42ca827..f62cd0e13c58 100644
--- a/net/mac80211/debugfs.c
+++ b/net/mac80211/debugfs.c
@@ -243,6 +243,31 @@ static ssize_t hwflags_read(struct file *file, char __user *user_buf,
return rv;
}
+static ssize_t misc_read(struct file *file, char __user *user_buf,
+ size_t count, loff_t *ppos)
+{
+ struct ieee80211_local *local = file->private_data;
+ /* Max len of each line is 16 characters, plus 9 for 'pending:\n' */
+ size_t bufsz = IEEE80211_MAX_QUEUES * 16 + 9;
+ char *buf = kzalloc(bufsz, GFP_KERNEL);
+ char *pos = buf, *end = buf + bufsz - 1;
+ ssize_t rv;
+ int i;
+ int ln;
+
+ pos += scnprintf(pos, end - pos, "pending:\n");
+
+ for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
+ ln = skb_queue_len(&local->pending[i]);
+ pos += scnprintf(pos, end - pos, "[%i] %d\n",
+ i, ln);
+ }
+
+ rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
+ kfree(buf);
+ return rv;
+}
+
static ssize_t queues_read(struct file *file, char __user *user_buf,
size_t count, loff_t *ppos)
{
@@ -263,6 +288,7 @@ static ssize_t queues_read(struct file *file, char __user *user_buf,
DEBUGFS_READONLY_FILE_OPS(hwflags);
DEBUGFS_READONLY_FILE_OPS(queues);
+DEBUGFS_READONLY_FILE_OPS(misc);
/* statistics stuff */
@@ -331,6 +357,7 @@ void debugfs_hw_add(struct ieee80211_local *local)
DEBUGFS_ADD(total_ps_buffered);
DEBUGFS_ADD(wep_iv);
DEBUGFS_ADD(queues);
+ DEBUGFS_ADD(misc);
#ifdef CONFIG_PM
DEBUGFS_ADD_MODE(reset, 0200);
#endif