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Revision 1.21 - (show annotations) (download)
Mon Jan 31 20:03:47 2005 UTC (9 years, 5 months ago) by johnm
Branch: MAIN
Changes since 1.20: +52 -63 lines
Multiple fixes.

1 # Copyright 1999-2004 Gentoo Foundation
2 # Distributed under the terms of the GNU General Public License v2
3 # $Header: /var/cvsroot/gentoo-x86/eclass/linux-info.eclass,v 1.16 2005/01/06 13:58:15 johnm Exp $
4 #
5 # Description: This eclass is used as a central eclass for accessing kernel
6 # related information for sources already installed.
7 # It is vital for linux-mod to function correctly, and is split
8 # out so that any ebuild behaviour "templates" are abstracted out
9 # using additional eclasses.
10 #
11 # Maintainer: John Mylchreest <johnm@gentoo.org>
12 # Copyright 2004 Gentoo Linux
13 #
14 # Please direct your bugs to the current eclass maintainer :)
15
16 # A Couple of env vars are available to effect usage of this eclass
17 # These are as follows:
18 #
19 # Env Var Option Description
20 # KERNEL_DIR <string> The directory containing kernel the target kernel
21 # sources.
22 # CONFIG_CHECK <string> a list of .config options to check for before
23 # proceeding with the install. ie: CONFIG_CHECK="MTRR"
24 # You can also check that an option doesn't exist by
25 # prepending it with an exclamation mark (!).
26 # ie: CONFIG_CHECK="!MTRR"
27 # ERROR_CFG <string> The error message to display when the above check
28 # fails. <CFG> should reference the appropriate option
29 # as above. ie: MTRR_ERROR="MTRR exists in the .config
30 # but shouldn't!!"
31 # KBUILD_OUTPUT <string> This is passed on commandline, or can be set from
32 # the kernel makefile. This contains the directory
33 # which is to be used as the kernel object directory.
34
35 # There are also a couple of variables which are set by this, and shouldn't be
36 # set by hand. These are as follows:
37 #
38 # Env Var Option Description
39 # KV_FULL <string> The full kernel version. ie: 2.6.9-gentoo-johnm-r1
40 # KV_MAJOR <integer> The kernel major version. ie: 2
41 # KV_MINOR <integer> The kernel minor version. ie: 6
42 # KV_PATCH <integer> The kernel patch version. ie: 9
43 # KV_EXTRA <string> The kernel EXTRAVERSION. ie: -gentoo
44 # KV_LOCAL <string> The kernel LOCALVERSION concatenation. ie: -johnm
45 # KV_DIR <string> The kernel source directory, will be null if
46 # KERNEL_DIR is invalid.
47 # KV_OUT_DIR <string> The kernel object directory. will be KV_DIR unless
48 # koutput is used. This should be used for referencing
49 # .config.
50
51 # And to ensure all the weirdness with crosscompile
52 inherit toolchain-funcs
53
54 ECLASS=linux-info
55 INHERITED="$INHERITED $ECLASS"
56 EXPORT_FUNCTIONS pkg_setup
57
58 # Overwritable environment Var's
59 # ---------------------------------------
60 KERNEL_DIR="${KERNEL_DIR:-${ROOT}usr/src/linux}"
61
62
63 # Bug fixes
64 # fix to bug #75034
65 case ${ARCH} in
66 ppc) BUILD_FIXES="${BUILD_FIXES} TOUT=${T}/.tmp_gas_check";;
67 ppc64) BUILD_FIXES="${BUILD_FIXES} TOUT=${T}/.tmp_gas_check";;
68 esac
69
70 # These are legacy wrappers for toolchain-funcs.
71 # I dont like them here, but oh well.
72 set_arch_to_kernel() { $(tc-arch-kernel); }
73 set_arch_to_portage() { $(tc-arch); }
74
75 # qeinfo "Message"
76 # -------------------
77 # qeinfo is a quiet einfo call when EBUILD_PHASE
78 # should not have visible output.
79 qout() {
80 local outputmsg type
81 type=${1}
82 shift
83 outputmsg="${@}"
84 case "${EBUILD_PHASE}" in
85 depend) unset outputmsg;;
86 clean) unset outputmsg;;
87 preinst) unset outputmsg;;
88 esac
89 [ -n "${outputmsg}" ] && ${type} "${outputmsg}"
90 }
91
92 qeinfo() { qout einfo "${@}" ; }
93 qeerror() { qout eerror "${@}" ; }
94
95 # File Functions
96 # ---------------------------------------
97
98 # getfilevar accepts 2 vars as follows:
99 # getfilevar <VARIABLE> <CONFIGFILE>
100
101 getfilevar() {
102 local ERROR workingdir basefname basedname myARCH="${ARCH}"
103 ERROR=0
104
105 [ -z "${1}" ] && ERROR=1
106 [ ! -f "${2}" ] && ERROR=1
107
108 if [ "${ERROR}" = 1 ]
109 then
110 ebeep
111 echo -e "\n"
112 eerror "getfilevar requires 2 variables, with the second a valid file."
113 eerror " getfilevar <VARIABLE> <CONFIGFILE>"
114 else
115 workingdir=${PWD}
116 basefname=$(basename ${2})
117 basedname=$(dirname ${2})
118 unset ARCH
119
120 cd ${basedname}
121 echo -e "include ${basefname}\ne:\n\t@echo \$(${1})" | \
122 make ${BUILD_FIXES} -f - e 2>/dev/null
123 cd ${workingdir}
124
125 ARCH=${myARCH}
126 fi
127 }
128
129 linux_chkconfig_present() {
130 local RESULT
131 RESULT="$(getfilevar CONFIG_${1} ${KV_OUT_DIR}/.config)"
132 [ "${RESULT}" = "m" -o "${RESULT}" = "y" ] && return 0 || return 1
133 }
134
135 linux_chkconfig_module() {
136 local RESULT
137 RESULT="$(getfilevar CONFIG_${1} ${KV_OUT_DIR}/.config)"
138 [ "${RESULT}" = "m" ] && return 0 || return 1
139 }
140
141 linux_chkconfig_builtin() {
142 local RESULT
143 RESULT="$(getfilevar CONFIG_${1} ${KV_OUT_DIR}/.config)"
144 [ "${RESULT}" = "y" ] && return 0 || return 1
145 }
146
147 linux_chkconfig_string() {
148 getfilevar "CONFIG_${1}" "${KV_OUT_DIR}/.config"
149 }
150
151 # Versioning Functions
152 # ---------------------------------------
153
154 # kernel_is returns true when the version is the same as the passed version
155 #
156 # For Example where KV = 2.6.9
157 # kernel_is 2 4 returns false
158 # kernel_is 2 returns true
159 # kernel_is 2 6 returns true
160 # kernel_is 2 6 8 returns false
161 # kernel_is 2 6 9 returns true
162 #
163 # got the jist yet?
164
165 kernel_is() {
166 # if we haven't determined the version yet, we need too.
167 get_version;
168
169 local RESULT operator test value i len
170 RESULT=0
171
172 operator="="
173 if [ "${1}" == "lt" ]
174 then
175 operator="-lt"
176 shift
177 elif [ "${1}" == "gt" ]
178 then
179 operator="-gt"
180 shift
181 elif [ "${1}" == "le" ]
182 then
183 operator="-le"
184 shift
185 elif [ "${1}" == "ge" ]
186 then
187 operator="-ge"
188 shift
189 fi
190
191 if [ -n "${1}" ]
192 then
193 value="${value}${1}"
194 test="${test}${KV_MAJOR}"
195 fi
196 if [ -n "${2}" ]
197 then
198 len=$[ 3 - ${#2} ]
199 for((i=0; i<$len; i++)); do
200 value="${value}0"
201 done
202 value="${value}${2}"
203
204 len=$[ 3 - ${#KV_MINOR} ]
205 for((i=0; i<$len; i++)); do
206 test="${test}0"
207 done
208 test="${test}${KV_MINOR}"
209 fi
210 if [ -n "${3}" ]
211 then
212 len=$[ 3 - ${#3} ]
213 for((i=0; i<$len; i++)); do
214 value="${value}0"
215 done
216 value="${value}${3}"
217
218 len=$[ 3 - ${#KV_PATCH} ]
219 for((i=0; i<$len; i++)); do
220 test="${test}0"
221 done
222 test="${test}${KV_PATCH}"
223 fi
224
225 [ ${test} ${operator} ${value} ] && return 0 || return 1
226 }
227
228 get_version() {
229 local kbuild_output
230
231 # no need to execute this twice assuming KV_FULL is populated.
232 # we can force by unsetting KV_FULL
233 [ -n "${KV_FULL}" ] && return 0
234
235 # if we dont know KV_FULL, then we need too.
236 # make sure KV_DIR isnt set since we need to work it out via KERNEL_DIR
237 unset KV_DIR
238
239 # KV_DIR will contain the full path to the sources directory we should use
240 qeinfo "Determining the location of the kernel source code"
241 [ -h "${KERNEL_DIR}" ] && KV_DIR="$(readlink -f ${KERNEL_DIR})"
242 [ -d "${KERNEL_DIR}" ] && KV_DIR="${KERNEL_DIR}"
243
244 if [ -z "${KV_DIR}" ]
245 then
246 qeerror "Unable to find kernel sources at ${KERNEL_DIR}"
247 qeinfo "This package requires Linux sources."
248 if [ "${KERNEL_DIR}" == "/usr/src/linux" ] ; then
249 qeinfo "Please make sure that ${KERNEL_DIR} points at your running kernel, "
250 qeinfo "(or the kernel you wish to build against)."
251 qeinfo "Alternatively, set the KERNEL_DIR environment variable to the kernel sources location"
252 else
253 qeinfo "Please ensure that the KERNEL_DIR environment variable points at full Linux sources of the kernel you wish to compile against."
254 fi
255 return 1
256 fi
257
258 qeinfo "Found kernel source directory:"
259 qeinfo " ${KV_DIR}"
260
261 if [ ! -s "${KV_DIR}/Makefile" ]
262 then
263 qeerror "Could not find a Makefile in the kernel source directory."
264 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources"
265 return 1
266 fi
267
268 # OK so now we know our sources directory, but they might be using
269 # KBUILD_OUTPUT, and we need this for .config and localversions-*
270 # so we better find it eh?
271 # do we pass KBUILD_OUTPUT on the CLI?
272 OUTPUT_DIR="${OUTPUT_DIR:-${KBUILD_OUTPUT}}"
273
274 # And if we didn't pass it, we can take a nosey in the Makefile
275 kbuild_output="$(getfilevar KBUILD_OUTPUT ${KV_DIR}/Makefile)"
276 OUTPUT_DIR="${OUTPUT_DIR:-${kbuild_output}}"
277
278 # And contrary to existing functions I feel we shouldn't trust the
279 # directory name to find version information as this seems insane.
280 # so we parse ${KV_DIR}/Makefile
281 KV_MAJOR="$(getfilevar VERSION ${KV_DIR}/Makefile)"
282 KV_MINOR="$(getfilevar PATCHLEVEL ${KV_DIR}/Makefile)"
283 KV_PATCH="$(getfilevar SUBLEVEL ${KV_DIR}/Makefile)"
284 KV_EXTRA="$(getfilevar EXTRAVERSION ${KV_DIR}/Makefile)"
285
286 if [ -z "${KV_MAJOR}" -o -z "${KV_MINOR}" -o -z "${KV_PATCH}" ]
287 then
288 qeerror "Could not detect kernel version."
289 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources."
290 return 1
291 fi
292
293 # and in newer versions we can also pull LOCALVERSION if it is set.
294 # but before we do this, we need to find if we use a different object directory.
295 # This *WILL* break if the user is using localversions, but we assume it was
296 # caught before this if they are.
297 [ "${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}.${KV_EXTRA}" == "$(uname -r)" ] && \
298 OUTPUT_DIR="${OUTPUT_DIR:-/lib/modules/${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}.${KV_EXTRA}/build}"
299
300 [ -h "${OUTPUT_DIR}" ] && KV_OUT_DIR="$(readlink -f ${OUTPUT_DIR})"
301 [ -d "${OUTPUT_DIR}" ] && KV_OUT_DIR="${OUTPUT_DIR}"
302 if [ -n "${KV_OUT_DIR}" ];
303 then
304 qeinfo "Found kernel object directory:"
305 qeinfo " ${KV_OUT_DIR}"
306
307 KV_LOCAL="$(cat ${KV_OUT_DIR}/localversion* 2>/dev/null)"
308 fi
309 # and if we STILL haven't got it, then we better just set it to KV_DIR
310 KV_OUT_DIR="${KV_OUT_DIR:-${KV_DIR}}"
311
312 KV_LOCAL="${KV_LOCAL}$(cat ${KV_DIR}/localversion* 2>/dev/null)"
313 KV_LOCAL="${KV_LOCAL}$(linux_chkconfig_string LOCALVERSION)"
314 KV_LOCAL="${KV_LOCAL//\"/}"
315
316 # And we should set KV_FULL to the full expanded version
317 KV_FULL="${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}${KV_LOCAL}"
318
319 qeinfo "Found sources for kernel version:"
320 qeinfo " ${KV_FULL}"
321
322 if [ ! -s "${KV_OUT_DIR}/.config" ]
323 then
324 qeerror "Could not find a usable .config in the kernel source directory."
325 qeerror "Please ensure that ${KERNEL_DIR} points to a configured set of Linux sources."
326 qeerror "If you are using KBUILD_OUTPUT, please set the environment var so that"
327 qeerror "it points to the necessary object directory so that it might find .config."
328 return 1
329 fi
330
331 return 0
332 }
333
334
335
336
337 # ebuild check functions
338 # ---------------------------------------
339
340 check_kernel_built() {
341 # if we haven't determined the version yet, we need too.
342 get_version;
343
344 if [ ! -f "${KV_OUT_DIR}/include/linux/version.h" ]
345 then
346 eerror "These sources have not yet been prepared."
347 eerror "We cannot build against an unprepared tree."
348 eerror "To resolve this, please type the following:"
349 eerror
350 eerror "# cd ${KV_DIR}"
351 eerror "# make oldconfig"
352 eerror "# make modules_prepare"
353 eerror
354 eerror "Then please try merging this module again."
355 die "Kernel sources need compiling first"
356 fi
357 }
358
359 check_modules_supported() {
360 # if we haven't determined the version yet, we need too.
361 get_version;
362
363 if ! linux_chkconfig_builtin "MODULES"
364 then
365 eerror "These sources do not support loading external modules."
366 eerror "to be able to use this module please enable \"Loadable modules support\""
367 eerror "in your kernel, recompile and then try merging this module again."
368 die "No support for external modules in ${KV_FULL} config"
369 fi
370 }
371
372 check_extra_config() {
373 local config negate error local_error i n temp_config
374
375 # if we haven't determined the version yet, we need too.
376 get_version;
377
378 einfo "Checking for suitable kernel configuration options"
379 for config in ${CONFIG_CHECK}
380 do
381 negate="${config:0:1}"
382 if [ "${negate}" == "!" ];
383 then
384 config="${config:1}"
385 if linux_chkconfig_present ${config}
386 then
387 local_error="${config}_ERROR"
388 local_error="${!local_error}"
389 [ -n "${local_error}" ] && eerror " ${local_error}" || \
390 eerror " CONFIG_${config}:\tshould not be set in the kernel configuration, but it is."
391 error=1
392 fi
393 elif [ "${negate}" == "@" ];
394 then
395 # we never call this unless we are using MODULE_NAMES
396
397 config="${config:1}"
398 temp_config="${config//*:}"
399 config="${config//:*}"
400 if linux_chkconfig_present ${config}
401 then
402 local_error="${config}_ERROR"
403 local_error="${!local_error}"
404 [ -n "${local_error}" ] && eerror " ${local_error}" || \
405 eerror " CONFIG_${config}:\tshould not be set in the kernel configuration, but it is."
406
407 for i in ${MODULE_NAMES}
408 do
409 n="${i//${temp_config}}"
410 [ -z "${n//(*}" ] && MODULE_IGNORE="${MODULE_IGNORE} ${temp_config}"
411 done
412 error=0
413 fi
414 else
415 if ! linux_chkconfig_present ${config}
416 then
417 # Support the new syntax first.
418 local_error="ERROR_${config}"
419 local_error="${!local_error}"
420
421 # then fall back on the older syntax.
422 if [[ -z ${local_error} ]] ; then
423 local_error="${config}_ERROR"
424 local_error="${!local_error}"
425 fi
426
427 [[ -n ${local_error} ]] && eerror " ${local_error}" || \
428 eerror " CONFIG_${config}:\tshould be set in the kernel configuration, but isn't"
429 error=1
430 fi
431 fi
432 done
433
434 if [ "${error}" == 1 ] ;
435 then
436 eerror "Please check to make sure these options are set correctly."
437 eerror "Once you have satisfied these options, please try merging"
438 eerror "this package again."
439 die "Incorrect kernel configuration options"
440 fi
441 }
442
443 check_zlibinflate() {
444 # if we haven't determined the version yet, we need too.
445 get_version;
446
447 # although I restructured this code - I really really really dont support it!
448
449 # bug #27882 - zlib routines are only linked into the kernel
450 # if something compiled into the kernel calls them
451 #
452 # plus, for the cloop module, it appears that there's no way
453 # to get cloop.o to include a static zlib if CONFIG_MODVERSIONS
454 # is on
455
456 local INFLATE
457 local DEFLATE
458
459 einfo "Determining the usability of ZLIB_INFLATE support in your kernel"
460
461 ebegin "checking ZLIB_INFLATE"
462 getfilevar_isbuiltin CONFIG_ZLIB_INFLATE ${KV_DIR}/.config
463 eend $?
464 [ "$?" != 0 ] && die
465
466 ebegin "checking ZLIB_DEFLATE"
467 getfilevar_isbuiltin CONFIG_ZLIB_DEFLATE ${KV_DIR}/.config
468 eend $?
469 [ "$?" != 0 ] && die
470
471
472 local LINENO_START
473 local LINENO_END
474 local SYMBOLS
475 local x
476
477 LINENO_END="$(grep -n 'CONFIG_ZLIB_INFLATE y' ${KV_DIR}/lib/Config.in | cut -d : -f 1)"
478 LINENO_START="$(head -n $LINENO_END ${KV_DIR}/lib/Config.in | grep -n 'if \[' | tail -n 1 | cut -d : -f 1)"
479 (( LINENO_AMOUNT = $LINENO_END - $LINENO_START ))
480 (( LINENO_END = $LINENO_END - 1 ))
481 SYMBOLS="$(head -n $LINENO_END ${KV_DIR}/lib/Config.in | tail -n $LINENO_AMOUNT | sed -e 's/^.*\(CONFIG_[^\" ]*\).*/\1/g;')"
482
483 # okay, now we have a list of symbols
484 # we need to check each one in turn, to see whether it is set or not
485 for x in $SYMBOLS ; do
486 if [ "${!x}" = "y" ]; then
487 # we have a winner!
488 einfo "${x} ensures zlib is linked into your kernel - excellent"
489 return 0
490 fi
491 done
492
493 eerror
494 eerror "This kernel module requires ZLIB library support."
495 eerror "You have enabled zlib support in your kernel, but haven't enabled"
496 eerror "enabled any option that will ensure that zlib is linked into your"
497 eerror "kernel."
498 eerror
499 eerror "Please ensure that you enable at least one of these options:"
500 eerror
501
502 for x in $SYMBOLS ; do
503 eerror " * $x"
504 done
505
506 eerror
507 eerror "Please remember to recompile and install your kernel, and reboot"
508 eerror "into your new kernel before attempting to load this kernel module."
509
510 die "Kernel doesn't include zlib support"
511 }
512
513 ################################
514 # Default pkg_setup
515 # Also used when inheriting linux-mod to force a get_version call
516
517 linux-info_pkg_setup() {
518 get_version || die "Unable to calculate Linux Kernel version"
519 [ -n "${CONFIG_CHECK}" ] && check_extra_config;
520 }

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