cfg80211: reg: remove support for built-in regdb
Parsing and building C structures from a regdb is no longer needed since the "firmware" file (regulatory.db) can be linked into the kernel image to achieve the same effect. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg
parent
1ea4ff3e9f
commit
c8c240e284
@ -200,23 +200,5 @@ Then in some part of your code after your wiphy has been registered:
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Statically compiled regulatory database
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---------------------------------------
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In most situations the userland solution using CRDA as described
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above is the preferred solution. However in some cases a set of
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rules built into the kernel itself may be desirable. To account
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for this situation, a configuration option has been provided
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(i.e. CONFIG_CFG80211_INTERNAL_REGDB). With this option enabled,
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the wireless database information contained in net/wireless/db.txt is
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used to generate a data structure encoded in net/wireless/regdb.c.
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That option also enables code in net/wireless/reg.c which queries
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the data in regdb.c as an alternative to using CRDA.
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The file net/wireless/db.txt should be kept up-to-date with the db.txt
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file available in the git repository here:
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git://git.kernel.org/pub/scm/linux/kernel/git/sforshee/wireless-regdb.git
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Again, most users in most situations should be using the CRDA package
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provided with their distribution, and in most other situations users
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should be building and using CRDA on their own rather than using
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this option. If you are not absolutely sure that you should be using
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CONFIG_CFG80211_INTERNAL_REGDB then _DO_NOT_USE_IT_.
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When a database should be fixed into the kernel, it can be provided as a
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firmware file at build time that is then linked into the kernel.
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1
net/wireless/.gitignore
vendored
1
net/wireless/.gitignore
vendored
@ -1 +0,0 @@
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regdb.c
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@ -140,30 +140,8 @@ config CFG80211_DEBUGFS
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If unsure, say N.
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config CFG80211_INTERNAL_REGDB
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bool "use statically compiled regulatory rules database" if EXPERT
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default n
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depends on CFG80211
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---help---
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This option generates an internal data structure representing
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the wireless regulatory rules described in net/wireless/db.txt
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and includes code to query that database. This is an alternative
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to using CRDA for defining regulatory rules for the kernel.
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Using this option requires some parsing of the db.txt at build time,
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the parser will be upkept with the latest wireless-regdb updates but
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older wireless-regdb formats will be ignored. The parser may later
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be replaced to avoid issues with conflicts on versions of
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wireless-regdb.
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For details see:
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http://wireless.kernel.org/en/developers/Regulatory
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Most distributions have a CRDA package. So if unsure, say N.
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config CFG80211_CRDA_SUPPORT
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bool "support CRDA" if CFG80211_INTERNAL_REGDB
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bool "support CRDA" if EXPERT
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default y
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depends on CFG80211
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help
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@ -14,11 +14,5 @@ cfg80211-y += mlme.o ibss.o sme.o chan.o ethtool.o mesh.o ap.o trace.o ocb.o
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cfg80211-$(CONFIG_OF) += of.o
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cfg80211-$(CONFIG_CFG80211_DEBUGFS) += debugfs.o
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cfg80211-$(CONFIG_CFG80211_WEXT) += wext-compat.o wext-sme.o
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cfg80211-$(CONFIG_CFG80211_INTERNAL_REGDB) += regdb.o
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CFLAGS_trace.o := -I$(src)
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$(obj)/regdb.c: $(src)/db.txt $(src)/genregdb.awk
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@$(AWK) -f $(srctree)/$(src)/genregdb.awk < $< > $@
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clean-files := regdb.c
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@ -1,17 +0,0 @@
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#
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# This file is a placeholder to prevent accidental build breakage if someone
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# enables CONFIG_CFG80211_INTERNAL_REGDB. Almost no one actually needs to
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# enable that build option.
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#
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# You should be using CRDA instead. It is even better if you use the CRDA
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# package provided by your distribution, since they will probably keep it
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# up-to-date on your behalf.
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#
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# If you _really_ intend to use CONFIG_CFG80211_INTERNAL_REGDB then you will
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# need to replace this file with one containing appropriately formatted
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# regulatory rules that cover the regulatory domains you will be using. Your
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# best option is to extract the db.txt file from the wireless-regdb git
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# repository:
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#
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# git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-regdb.git
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#
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@ -1,158 +0,0 @@
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#!/usr/bin/awk -f
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#
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# genregdb.awk -- generate regdb.c from db.txt
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#
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# Actually, it reads from stdin (presumed to be db.txt) and writes
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# to stdout (presumed to be regdb.c), but close enough...
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#
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# Copyright 2009 John W. Linville <linville@tuxdriver.com>
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#
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# Permission to use, copy, modify, and/or distribute this software for any
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# purpose with or without fee is hereby granted, provided that the above
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# copyright notice and this permission notice appear in all copies.
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#
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# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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BEGIN {
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active = 0
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rules = 0;
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print "/*"
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print " * DO NOT EDIT -- file generated from data in db.txt"
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print " */"
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print ""
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print "#include <linux/nl80211.h>"
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print "#include <net/cfg80211.h>"
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print "#include \"regdb.h\""
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print ""
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regdb = "const struct ieee80211_regdomain *reg_regdb[] = {\n"
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}
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function parse_country_head() {
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country=$2
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sub(/:/, "", country)
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printf "static const struct ieee80211_regdomain regdom_%s = {\n", country
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printf "\t.alpha2 = \"%s\",\n", country
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if ($NF ~ /DFS-ETSI/)
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printf "\t.dfs_region = NL80211_DFS_ETSI,\n"
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else if ($NF ~ /DFS-FCC/)
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printf "\t.dfs_region = NL80211_DFS_FCC,\n"
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else if ($NF ~ /DFS-JP/)
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printf "\t.dfs_region = NL80211_DFS_JP,\n"
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printf "\t.reg_rules = {\n"
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active = 1
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regdb = regdb "\t®dom_" country ",\n"
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}
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function parse_reg_rule()
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{
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flag_starts_at = 7
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start = $1
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sub(/\(/, "", start)
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end = $3
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bw = $5
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sub(/\),/, "", bw)
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gain = 0
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power = $6
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# power might be in mW...
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units = $7
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dfs_cac = 0
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sub(/\(/, "", power)
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sub(/\),/, "", power)
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sub(/\),/, "", units)
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sub(/\)/, "", units)
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if (units == "mW") {
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flag_starts_at = 8
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power = 10 * log(power)/log(10)
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if ($8 ~ /[[:digit:]]/) {
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flag_starts_at = 9
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dfs_cac = $8
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}
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} else {
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if ($7 ~ /[[:digit:]]/) {
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flag_starts_at = 8
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dfs_cac = $7
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}
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}
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sub(/\(/, "", dfs_cac)
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sub(/\),/, "", dfs_cac)
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flagstr = ""
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for (i=flag_starts_at; i<=NF; i++)
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flagstr = flagstr $i
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split(flagstr, flagarray, ",")
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flags = ""
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for (arg in flagarray) {
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if (flagarray[arg] == "NO-OFDM") {
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flags = flags "\n\t\t\tNL80211_RRF_NO_OFDM | "
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} else if (flagarray[arg] == "NO-CCK") {
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flags = flags "\n\t\t\tNL80211_RRF_NO_CCK | "
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} else if (flagarray[arg] == "NO-INDOOR") {
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flags = flags "\n\t\t\tNL80211_RRF_NO_INDOOR | "
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} else if (flagarray[arg] == "NO-OUTDOOR") {
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flags = flags "\n\t\t\tNL80211_RRF_NO_OUTDOOR | "
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} else if (flagarray[arg] == "DFS") {
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flags = flags "\n\t\t\tNL80211_RRF_DFS | "
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} else if (flagarray[arg] == "PTP-ONLY") {
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flags = flags "\n\t\t\tNL80211_RRF_PTP_ONLY | "
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} else if (flagarray[arg] == "PTMP-ONLY") {
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flags = flags "\n\t\t\tNL80211_RRF_PTMP_ONLY | "
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} else if (flagarray[arg] == "PASSIVE-SCAN") {
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flags = flags "\n\t\t\tNL80211_RRF_NO_IR | "
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} else if (flagarray[arg] == "NO-IBSS") {
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flags = flags "\n\t\t\tNL80211_RRF_NO_IR | "
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} else if (flagarray[arg] == "NO-IR") {
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flags = flags "\n\t\t\tNL80211_RRF_NO_IR | "
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} else if (flagarray[arg] == "AUTO-BW") {
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flags = flags "\n\t\t\tNL80211_RRF_AUTO_BW | "
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}
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}
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flags = flags "0"
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printf "\t\tREG_RULE_EXT(%d, %d, %d, %d, %.0f, %d, %s),\n", start, end, bw, gain, power, dfs_cac, flags
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rules++
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}
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function print_tail_country()
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{
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active = 0
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printf "\t},\n"
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printf "\t.n_reg_rules = %d\n", rules
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printf "};\n\n"
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rules = 0;
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}
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/^[ \t]*#/ {
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# Ignore
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}
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!active && /^[ \t]*$/ {
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# Ignore
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}
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!active && /country/ {
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parse_country_head()
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}
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active && /^[ \t]*\(/ {
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parse_reg_rule()
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}
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active && /^[ \t]*$/ {
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print_tail_country()
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}
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END {
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if (active)
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print_tail_country()
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print regdb "};"
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print ""
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print "int reg_regdb_size = ARRAY_SIZE(reg_regdb);"
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}
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@ -59,7 +59,6 @@
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#include "core.h"
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#include "reg.h"
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#include "rdev-ops.h"
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#include "regdb.h"
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#include "nl80211.h"
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/*
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@ -495,38 +494,6 @@ static int reg_schedule_apply(const struct ieee80211_regdomain *regdom)
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return 0;
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}
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#ifdef CONFIG_CFG80211_INTERNAL_REGDB
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static int reg_query_builtin(const char *alpha2)
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{
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const struct ieee80211_regdomain *regdom = NULL;
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unsigned int i;
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for (i = 0; i < reg_regdb_size; i++) {
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if (alpha2_equal(alpha2, reg_regdb[i]->alpha2)) {
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regdom = reg_copy_regd(reg_regdb[i]);
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break;
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}
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}
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if (!regdom)
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return -ENODATA;
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return reg_schedule_apply(regdom);
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}
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/* Feel free to add any other sanity checks here */
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static void reg_regdb_size_check(void)
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{
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/* We should ideally BUILD_BUG_ON() but then random builds would fail */
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WARN_ONCE(!reg_regdb_size, "db.txt is empty, you should update it...");
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}
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#else
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static inline void reg_regdb_size_check(void) {}
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static inline int reg_query_builtin(const char *alpha2)
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{
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return -ENODATA;
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}
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#endif /* CONFIG_CFG80211_INTERNAL_REGDB */
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#ifdef CONFIG_CFG80211_CRDA_SUPPORT
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/* Max number of consecutive attempts to communicate with CRDA */
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#define REG_MAX_CRDA_TIMEOUTS 10
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@ -885,10 +852,6 @@ int reg_reload_regdb(void)
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static bool reg_query_database(struct regulatory_request *request)
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{
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/* query internal regulatory database (if it exists) */
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if (reg_query_builtin(request->alpha2) == 0)
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return true;
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if (query_regdb_file(request->alpha2) == 0)
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return true;
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@ -3580,8 +3543,6 @@ int __init regulatory_init(void)
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spin_lock_init(®_pending_beacons_lock);
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spin_lock_init(®_indoor_lock);
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reg_regdb_size_check();
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rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom);
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user_alpha2[0] = '9';
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@ -1,23 +0,0 @@
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#ifndef __REGDB_H__
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#define __REGDB_H__
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/*
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* Copyright 2009 John W. Linville <linville@tuxdriver.com>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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extern const struct ieee80211_regdomain *reg_regdb[];
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extern int reg_regdb_size;
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#endif /* __REGDB_H__ */
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