1 // SPDX-License-Identifier: GPL-2.0-only
5 * Copyright 2009 Luis R. Rodriguez <lrodriguez@atheros.com>
6 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
9 #include <linux/slab.h>
13 #define DEBUGFS_READONLY_FILE(name, buflen, fmt, value...) \
14 static ssize_t name## _read(struct file *file, char __user *userbuf, \
15 size_t count, loff_t *ppos) \
17 struct wiphy *wiphy = file->private_data; \
21 res = scnprintf(buf, buflen, fmt "\n", ##value); \
22 return simple_read_from_buffer(userbuf, count, ppos, buf, res); \
25 static const struct file_operations name## _ops = { \
26 .read = name## _read, \
27 .open = simple_open, \
28 .llseek = generic_file_llseek, \
31 DEBUGFS_READONLY_FILE(rts_threshold
, 20, "%d",
32 wiphy
->rts_threshold
);
33 DEBUGFS_READONLY_FILE(fragmentation_threshold
, 20, "%d",
34 wiphy
->frag_threshold
);
35 DEBUGFS_READONLY_FILE(short_retry_limit
, 20, "%d",
37 DEBUGFS_READONLY_FILE(long_retry_limit
, 20, "%d",
40 static int ht_print_chan(struct ieee80211_channel
*chan
,
41 char *buf
, int buf_size
, int offset
)
43 if (WARN_ON(offset
> buf_size
))
46 if (chan
->flags
& IEEE80211_CHAN_DISABLED
)
47 return scnprintf(buf
+ offset
,
52 return scnprintf(buf
+ offset
,
56 (chan
->flags
& IEEE80211_CHAN_NO_HT40MINUS
) ?
58 (chan
->flags
& IEEE80211_CHAN_NO_HT40PLUS
) ?
62 static ssize_t
ht40allow_map_read(struct file
*file
,
63 char __user
*user_buf
,
64 size_t count
, loff_t
*ppos
)
66 struct wiphy
*wiphy
= file
->private_data
;
68 unsigned int offset
= 0, buf_size
= PAGE_SIZE
, i
, r
;
69 enum nl80211_band band
;
70 struct ieee80211_supported_band
*sband
;
72 buf
= kzalloc(buf_size
, GFP_KERNEL
);
76 for (band
= 0; band
< NUM_NL80211_BANDS
; band
++) {
77 sband
= wiphy
->bands
[band
];
80 for (i
= 0; i
< sband
->n_channels
; i
++)
81 offset
+= ht_print_chan(&sband
->channels
[i
],
82 buf
, buf_size
, offset
);
85 r
= simple_read_from_buffer(user_buf
, count
, ppos
, buf
, offset
);
92 static const struct file_operations ht40allow_map_ops
= {
93 .read
= ht40allow_map_read
,
95 .llseek
= default_llseek
,
98 #define DEBUGFS_ADD(name) \
99 debugfs_create_file(#name, 0444, phyd, &rdev->wiphy, &name## _ops)
101 void cfg80211_debugfs_rdev_add(struct cfg80211_registered_device
*rdev
)
103 struct dentry
*phyd
= rdev
->wiphy
.debugfsdir
;
105 DEBUGFS_ADD(rts_threshold
);
106 DEBUGFS_ADD(fragmentation_threshold
);
107 DEBUGFS_ADD(short_retry_limit
);
108 DEBUGFS_ADD(long_retry_limit
);
109 DEBUGFS_ADD(ht40allow_map
);