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Revision 1.102 - (show annotations) (download)
Sun Sep 29 02:49:40 2013 UTC (11 months, 2 weeks ago) by vapier
Branch: MAIN
Changes since 1.101: +13 -10 lines
get_version: extract version info with getfilevar_noexec as it should always work, and is much faster than evaluating with make; reported by Doug Anderson from ChromiumOS

1 # Copyright 1999-2013 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 1.100 2013/02/10 07:53:31 vapier Exp $
4
5 # @ECLASS: linux-info.eclass
6 # @MAINTAINER:
7 # kernel-misc@gentoo.org
8 # @AUTHOR:
9 # Original author: John Mylchreest <johnm@gentoo.org>
10 # @BLURB: eclass used for accessing kernel related information
11 # @DESCRIPTION:
12 # This eclass is used as a central eclass for accessing kernel
13 # related information for source or binary already installed.
14 # It is vital for linux-mod.eclass to function correctly, and is split
15 # out so that any ebuild behaviour "templates" are abstracted out
16 # using additional eclasses.
17 #
18 # "kernel config" in this file means:
19 # The .config of the currently installed sources is used as the first
20 # preference, with a fall-back to bundled config (/proc/config.gz) if available.
21 #
22 # Before using any of the config-handling functions in this eclass, you must
23 # ensure that one of the following functions has been called (in order of
24 # preference), otherwise you will get bugs like #364041):
25 # linux-info_pkg_setup
26 # linux-info_get_any_version
27 # get_version
28 # get_running_version
29
30 # A Couple of env vars are available to effect usage of this eclass
31 # These are as follows:
32
33 # @ECLASS-VARIABLE: KERNEL_DIR
34 # @DESCRIPTION:
35 # A string containing the directory of the target kernel sources. The default value is
36 # "/usr/src/linux"
37
38 # @ECLASS-VARIABLE: CONFIG_CHECK
39 # @DESCRIPTION:
40 # A string containing a list of .config options to check for before
41 # proceeding with the install.
42 #
43 # e.g.: CONFIG_CHECK="MTRR"
44 #
45 # You can also check that an option doesn't exist by
46 # prepending it with an exclamation mark (!).
47 #
48 # e.g.: CONFIG_CHECK="!MTRR"
49 #
50 # To simply warn about a missing option, prepend a '~'.
51 # It may be combined with '!'.
52 #
53 # In general, most checks should be non-fatal. The only time fatal checks should
54 # be used is for building kernel modules or cases that a compile will fail
55 # without the option.
56 #
57 # This is to allow usage of binary kernels, and minimal systems without kernel
58 # sources.
59
60 # @ECLASS-VARIABLE: ERROR_<CFG>
61 # @DESCRIPTION:
62 # A string containing the error message to display when the check against CONFIG_CHECK
63 # fails. <CFG> should reference the appropriate option used in CONFIG_CHECK.
64 #
65 # e.g.: ERROR_MTRR="MTRR exists in the .config but shouldn't!!"
66
67 # @ECLASS-VARIABLE: KBUILD_OUTPUT
68 # @DESCRIPTION:
69 # A string passed on commandline, or set from the kernel makefile. It contains the directory
70 # which is to be used as the kernel object directory.
71
72 # There are also a couple of variables which are set by this, and shouldn't be
73 # set by hand. These are as follows:
74
75 # @ECLASS-VARIABLE: KV_FULL
76 # @DESCRIPTION:
77 # A read-only variable. It's a string containing the full kernel version. ie: 2.6.9-gentoo-johnm-r1
78
79 # @ECLASS-VARIABLE: KV_MAJOR
80 # @DESCRIPTION:
81 # A read-only variable. It's an integer containing the kernel major version. ie: 2
82
83 # @ECLASS-VARIABLE: KV_MINOR
84 # @DESCRIPTION:
85 # A read-only variable. It's an integer containing the kernel minor version. ie: 6
86
87 # @ECLASS-VARIABLE: KV_PATCH
88 # @DESCRIPTION:
89 # A read-only variable. It's an integer containing the kernel patch version. ie: 9
90
91 # @ECLASS-VARIABLE: KV_EXTRA
92 # @DESCRIPTION:
93 # A read-only variable. It's a string containing the kernel EXTRAVERSION. ie: -gentoo
94
95 # @ECLASS-VARIABLE: KV_LOCAL
96 # @DESCRIPTION:
97 # A read-only variable. It's a string containing the kernel LOCALVERSION concatenation. ie: -johnm
98
99 # @ECLASS-VARIABLE: KV_DIR
100 # @DESCRIPTION:
101 # A read-only variable. It's a string containing the kernel source directory, will be null if
102 # KERNEL_DIR is invalid.
103
104 # @ECLASS-VARIABLE: KV_OUT_DIR
105 # @DESCRIPTION:
106 # A read-only variable. It's a string containing the kernel object directory, will be KV_DIR unless
107 # KBUILD_OUTPUT is used. This should be used for referencing .config.
108
109 # And to ensure all the weirdness with crosscompile
110 inherit toolchain-funcs versionator
111
112 EXPORT_FUNCTIONS pkg_setup
113
114 # Overwritable environment Var's
115 # ---------------------------------------
116 KERNEL_DIR="${KERNEL_DIR:-${ROOT}usr/src/linux}"
117
118
119 # Bug fixes
120 # fix to bug #75034
121 case ${ARCH} in
122 ppc) BUILD_FIXES="${BUILD_FIXES} TOUT=${T}/.tmp_gas_check";;
123 ppc64) BUILD_FIXES="${BUILD_FIXES} TOUT=${T}/.tmp_gas_check";;
124 esac
125
126 # @FUNCTION: set_arch_to_kernel
127 # @DESCRIPTION:
128 # Set the env ARCH to match what the kernel expects.
129 set_arch_to_kernel() { export ARCH=$(tc-arch-kernel); }
130 # @FUNCTION: set_arch_to_portage
131 # @DESCRIPTION:
132 # Set the env ARCH to match what portage expects.
133 set_arch_to_portage() { export ARCH=$(tc-arch); }
134
135 # qeinfo "Message"
136 # -------------------
137 # qeinfo is a quiet einfo call when EBUILD_PHASE
138 # should not have visible output.
139 qout() {
140 local outputmsg type
141 type=${1}
142 shift
143 outputmsg="${@}"
144 case "${EBUILD_PHASE}" in
145 depend) unset outputmsg;;
146 clean) unset outputmsg;;
147 preinst) unset outputmsg;;
148 esac
149 [ -n "${outputmsg}" ] && ${type} "${outputmsg}"
150 }
151
152 qeinfo() { qout einfo "${@}" ; }
153 qewarn() { qout ewarn "${@}" ; }
154 qeerror() { qout eerror "${@}" ; }
155
156 # File Functions
157 # ---------------------------------------
158
159 # @FUNCTION: getfilevar
160 # @USAGE: variable configfile
161 # @RETURN: the value of the variable
162 # @DESCRIPTION:
163 # It detects the value of the variable defined in the file configfile. This is
164 # done by including the configfile, and printing the variable with Make.
165 # It WILL break if your makefile has missing dependencies!
166 getfilevar() {
167 local ERROR basefname basedname myARCH="${ARCH}"
168 ERROR=0
169
170 [ -z "${1}" ] && ERROR=1
171 [ ! -f "${2}" ] && ERROR=1
172
173 if [ "${ERROR}" = 1 ]
174 then
175 echo -e "\n"
176 eerror "getfilevar requires 2 variables, with the second a valid file."
177 eerror " getfilevar <VARIABLE> <CONFIGFILE>"
178 else
179 basefname="$(basename ${2})"
180 basedname="$(dirname ${2})"
181 unset ARCH
182
183 # We use nonfatal because we want the caller to take care of things #373151
184 [[ ${EAPI:-0} == [0123] ]] && nonfatal() { "$@"; }
185 echo -e "e:\\n\\t@echo \$(${1})\\ninclude ${basefname}" | \
186 nonfatal emake -C "${basedname}" M="${S}" ${BUILD_FIXES} -s -f - 2>/dev/null
187
188 ARCH=${myARCH}
189 fi
190 }
191
192 # @FUNCTION: getfilevar_noexec
193 # @USAGE: variable configfile
194 # @RETURN: the value of the variable
195 # @DESCRIPTION:
196 # It detects the value of the variable defined in the file configfile.
197 # This is done with sed matching an expression only. If the variable is defined,
198 # you will run into problems. See getfilevar for those cases.
199 getfilevar_noexec() {
200 local ERROR basefname basedname mycat myARCH="${ARCH}"
201 ERROR=0
202 mycat='cat'
203
204 [ -z "${1}" ] && ERROR=1
205 [ ! -f "${2}" ] && ERROR=1
206 [ "${2%.gz}" != "${2}" ] && mycat='zcat'
207
208 if [ "${ERROR}" = 1 ]
209 then
210 echo -e "\n"
211 eerror "getfilevar_noexec requires 2 variables, with the second a valid file."
212 eerror " getfilevar_noexec <VARIABLE> <CONFIGFILE>"
213 else
214 ${mycat} "${2}" | \
215 sed -n \
216 -e "/^[[:space:]]*${1}[[:space:]]*:\\?=[[:space:]]*\(.*\)\$/{
217 s,^[^=]*[[:space:]]*=[[:space:]]*,,g ;
218 s,[[:space:]]*\$,,g ;
219 p
220 }"
221 fi
222 }
223
224 # @ECLASS-VARIABLE: _LINUX_CONFIG_EXISTS_DONE
225 # @INTERNAL
226 # @DESCRIPTION:
227 # This is only set if one of the linux_config_*exists functions has been called.
228 # We use it for a QA warning that the check for a config has not been performed,
229 # as linux_chkconfig* in non-legacy mode WILL return an undefined value if no
230 # config is available at all.
231 _LINUX_CONFIG_EXISTS_DONE=
232
233 linux_config_qa_check() {
234 local f="$1"
235 if [ -z "${_LINUX_CONFIG_EXISTS_DONE}" ]; then
236 ewarn "QA: You called $f before any linux_config_exists!"
237 ewarn "QA: The return value of $f will NOT guaranteed later!"
238 fi
239 }
240
241 # @FUNCTION: linux_config_src_exists
242 # @RETURN: true or false
243 # @DESCRIPTION:
244 # It returns true if .config exists in a build directory otherwise false
245 linux_config_src_exists() {
246 export _LINUX_CONFIG_EXISTS_DONE=1
247 [[ -n ${KV_OUT_DIR} && -s ${KV_OUT_DIR}/.config ]]
248 }
249
250 # @FUNCTION: linux_config_bin_exists
251 # @RETURN: true or false
252 # @DESCRIPTION:
253 # It returns true if .config exists in /proc, otherwise false
254 linux_config_bin_exists() {
255 export _LINUX_CONFIG_EXISTS_DONE=1
256 [[ -s /proc/config.gz ]]
257 }
258
259 # @FUNCTION: linux_config_exists
260 # @RETURN: true or false
261 # @DESCRIPTION:
262 # It returns true if .config exists otherwise false
263 #
264 # This function MUST be checked before using any of the linux_chkconfig_*
265 # functions.
266 linux_config_exists() {
267 linux_config_src_exists || linux_config_bin_exists
268 }
269
270 # @FUNCTION: linux_config_path
271 # @DESCRIPTION:
272 # Echo the name of the config file to use. If none are found,
273 # then return false.
274 linux_config_path() {
275 if linux_config_src_exists; then
276 echo "${KV_OUT_DIR}/.config"
277 elif linux_config_bin_exists; then
278 echo "/proc/config.gz"
279 else
280 return 1
281 fi
282 }
283
284 # @FUNCTION: require_configured_kernel
285 # @DESCRIPTION:
286 # This function verifies that the current kernel is configured (it checks against the existence of .config)
287 # otherwise it dies.
288 require_configured_kernel() {
289 if ! linux_config_src_exists; then
290 qeerror "Could not find a usable .config in the kernel source directory."
291 qeerror "Please ensure that ${KERNEL_DIR} points to a configured set of Linux sources."
292 qeerror "If you are using KBUILD_OUTPUT, please set the environment var so that"
293 qeerror "it points to the necessary object directory so that it might find .config."
294 die "Kernel not configured; no .config found in ${KV_OUT_DIR}"
295 fi
296 }
297
298 # @FUNCTION: linux_chkconfig_present
299 # @USAGE: option
300 # @RETURN: true or false
301 # @DESCRIPTION:
302 # It checks that CONFIG_<option>=y or CONFIG_<option>=m is present in the current kernel .config
303 # If linux_config_exists returns false, the results of this are UNDEFINED. You
304 # MUST call linux_config_exists first.
305 linux_chkconfig_present() {
306 linux_config_qa_check linux_chkconfig_present
307 [[ $(getfilevar_noexec "CONFIG_$1" "$(linux_config_path)") == [my] ]]
308 }
309
310 # @FUNCTION: linux_chkconfig_module
311 # @USAGE: option
312 # @RETURN: true or false
313 # @DESCRIPTION:
314 # It checks that CONFIG_<option>=m is present in the current kernel .config
315 # If linux_config_exists returns false, the results of this are UNDEFINED. You
316 # MUST call linux_config_exists first.
317 linux_chkconfig_module() {
318 linux_config_qa_check linux_chkconfig_module
319 [[ $(getfilevar_noexec "CONFIG_$1" "$(linux_config_path)") == m ]]
320 }
321
322 # @FUNCTION: linux_chkconfig_builtin
323 # @USAGE: option
324 # @RETURN: true or false
325 # @DESCRIPTION:
326 # It checks that CONFIG_<option>=y is present in the current kernel .config
327 # If linux_config_exists returns false, the results of this are UNDEFINED. You
328 # MUST call linux_config_exists first.
329 linux_chkconfig_builtin() {
330 linux_config_qa_check linux_chkconfig_builtin
331 [[ $(getfilevar_noexec "CONFIG_$1" "$(linux_config_path)") == y ]]
332 }
333
334 # @FUNCTION: linux_chkconfig_string
335 # @USAGE: option
336 # @RETURN: CONFIG_<option>
337 # @DESCRIPTION:
338 # It prints the CONFIG_<option> value of the current kernel .config (it requires a configured kernel).
339 # If linux_config_exists returns false, the results of this are UNDEFINED. You
340 # MUST call linux_config_exists first.
341 linux_chkconfig_string() {
342 linux_config_qa_check linux_chkconfig_string
343 getfilevar_noexec "CONFIG_$1" "$(linux_config_path)"
344 }
345
346 # Versioning Functions
347 # ---------------------------------------
348
349 # @FUNCTION: kernel_is
350 # @USAGE: [-lt -gt -le -ge -eq] major_number [minor_number patch_number]
351 # @RETURN: true or false
352 # @DESCRIPTION:
353 # It returns true when the current kernel version satisfies the comparison against the passed version.
354 # -eq is the default comparison.
355 #
356 # @CODE
357 # For Example where KV = 2.6.9
358 # kernel_is 2 4 returns false
359 # kernel_is 2 returns true
360 # kernel_is 2 6 returns true
361 # kernel_is 2 6 8 returns false
362 # kernel_is 2 6 9 returns true
363 # @CODE
364
365 # Note: duplicated in kernel-2.eclass
366 kernel_is() {
367 # if we haven't determined the version yet, we need to.
368 linux-info_get_any_version
369
370 # Now we can continue
371 local operator test value
372
373 case ${1#-} in
374 lt) operator="-lt"; shift;;
375 gt) operator="-gt"; shift;;
376 le) operator="-le"; shift;;
377 ge) operator="-ge"; shift;;
378 eq) operator="-eq"; shift;;
379 *) operator="-eq";;
380 esac
381 [[ $# -gt 3 ]] && die "Error in kernel-2_kernel_is(): too many parameters"
382
383 : $(( test = (KV_MAJOR << 16) + (KV_MINOR << 8) + KV_PATCH ))
384 : $(( value = (${1:-${KV_MAJOR}} << 16) + (${2:-${KV_MINOR}} << 8) + ${3:-${KV_PATCH}} ))
385 [ ${test} ${operator} ${value} ]
386 }
387
388 get_localversion() {
389 local lv_list i x
390
391 # ignore files with ~ in it.
392 for i in $(ls ${1}/localversion* 2>/dev/null); do
393 [[ -n ${i//*~*} ]] && lv_list="${lv_list} ${i}"
394 done
395
396 for i in ${lv_list}; do
397 x="${x}$(<${i})"
398 done
399 x=${x/ /}
400 echo ${x}
401 }
402
403 # Check if the Makefile is valid for direct parsing.
404 # Check status results:
405 # - PASS, use 'getfilevar' to extract values
406 # - FAIL, use 'getfilevar_noexec' to extract values
407 # The check may fail if:
408 # - make is not present
409 # - corruption exists in the kernel makefile
410 get_makefile_extract_function() {
411 local a='' b='' mkfunc='getfilevar'
412 a="$(getfilevar VERSION ${KERNEL_MAKEFILE})"
413 b="$(getfilevar_noexec VERSION ${KERNEL_MAKEFILE})"
414 [[ "${a}" != "${b}" ]] && mkfunc='getfilevar_noexec'
415 echo "${mkfunc}"
416 }
417
418 # internal variable, so we know to only print the warning once
419 get_version_warning_done=
420
421 # @FUNCTION: get_version
422 # @DESCRIPTION:
423 # It gets the version of the kernel inside KERNEL_DIR and populates the KV_FULL variable
424 # (if KV_FULL is already set it does nothing).
425 #
426 # The kernel version variables (KV_MAJOR, KV_MINOR, KV_PATCH, KV_EXTRA and KV_LOCAL) are also set.
427 #
428 # The KV_DIR is set using the KERNEL_DIR env var, the KV_DIR_OUT is set using a valid
429 # KBUILD_OUTPUT (in a decreasing priority list, we look for the env var, makefile var or the
430 # symlink /lib/modules/${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}/build).
431 get_version() {
432 local tmplocal
433
434 # no need to execute this twice assuming KV_FULL is populated.
435 # we can force by unsetting KV_FULL
436 [ -n "${KV_FULL}" ] && return 0
437
438 # if we dont know KV_FULL, then we need too.
439 # make sure KV_DIR isnt set since we need to work it out via KERNEL_DIR
440 unset KV_DIR
441
442 # KV_DIR will contain the full path to the sources directory we should use
443 [ -z "${get_version_warning_done}" ] && \
444 qeinfo "Determining the location of the kernel source code"
445 [ -h "${KERNEL_DIR}" ] && KV_DIR="$(readlink -f ${KERNEL_DIR})"
446 [ -d "${KERNEL_DIR}" ] && KV_DIR="${KERNEL_DIR}"
447
448 if [ -z "${KV_DIR}" ]
449 then
450 if [ -z "${get_version_warning_done}" ]; then
451 get_version_warning_done=1
452 qeerror "Unable to find kernel sources at ${KERNEL_DIR}"
453 #qeinfo "This package requires Linux sources."
454 if [ "${KERNEL_DIR}" == "/usr/src/linux" ] ; then
455 qeinfo "Please make sure that ${KERNEL_DIR} points at your running kernel, "
456 qeinfo "(or the kernel you wish to build against)."
457 qeinfo "Alternatively, set the KERNEL_DIR environment variable to the kernel sources location"
458 else
459 qeinfo "Please ensure that the KERNEL_DIR environment variable points at full Linux sources of the kernel you wish to compile against."
460 fi
461 fi
462 return 1
463 fi
464
465 # See if the kernel dir is actually an output dir. #454294
466 if [ -z "${KBUILD_OUTPUT}" -a -L "${KERNEL_DIR}/source" ]; then
467 KBUILD_OUTPUT=${KERNEL_DIR}
468 KERNEL_DIR=$(readlink -f "${KERNEL_DIR}/source")
469 KV_DIR=${KERNEL_DIR}
470 fi
471
472 if [ -z "${get_version_warning_done}" ]; then
473 qeinfo "Found kernel source directory:"
474 qeinfo " ${KV_DIR}"
475 fi
476
477 if [ ! -s "${KV_DIR}/Makefile" ]
478 then
479 if [ -z "${get_version_warning_done}" ]; then
480 get_version_warning_done=1
481 qeerror "Could not find a Makefile in the kernel source directory."
482 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources"
483 fi
484 return 1
485 fi
486
487 # OK so now we know our sources directory, but they might be using
488 # KBUILD_OUTPUT, and we need this for .config and localversions-*
489 # so we better find it eh?
490 # do we pass KBUILD_OUTPUT on the CLI?
491 local OUTPUT_DIR=${KBUILD_OUTPUT}
492
493 # keep track of it
494 KERNEL_MAKEFILE="${KV_DIR}/Makefile"
495
496 if [[ -z ${OUTPUT_DIR} ]]; then
497 # Decide the function used to extract makefile variables.
498 local mkfunc=$(get_makefile_extract_function "${KERNEL_MAKEFILE}")
499
500 # And if we didn't pass it, we can take a nosey in the Makefile.
501 OUTPUT_DIR=$(${mkfunc} KBUILD_OUTPUT "${KERNEL_MAKEFILE}")
502 fi
503
504 # And contrary to existing functions I feel we shouldn't trust the
505 # directory name to find version information as this seems insane.
506 # So we parse ${KERNEL_MAKEFILE}. We should be able to trust that
507 # the Makefile is simple enough to use the noexec extract function.
508 # This has been true for every release thus far, and it's faster
509 # than using make to evaluate the Makefile every time.
510 KV_MAJOR=$(getfilevar_noexec VERSION "${KERNEL_MAKEFILE}")
511 KV_MINOR=$(getfilevar_noexec PATCHLEVEL "${KERNEL_MAKEFILE}")
512 KV_PATCH=$(getfilevar_noexec SUBLEVEL "${KERNEL_MAKEFILE}")
513 KV_EXTRA=$(getfilevar_noexec EXTRAVERSION "${KERNEL_MAKEFILE}")
514
515 if [ -z "${KV_MAJOR}" -o -z "${KV_MINOR}" -o -z "${KV_PATCH}" ]
516 then
517 if [ -z "${get_version_warning_done}" ]; then
518 get_version_warning_done=1
519 qeerror "Could not detect kernel version."
520 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources."
521 fi
522 return 1
523 fi
524
525 # and in newer versions we can also pull LOCALVERSION if it is set.
526 # but before we do this, we need to find if we use a different object directory.
527 # This *WILL* break if the user is using localversions, but we assume it was
528 # caught before this if they are.
529 OUTPUT_DIR="${OUTPUT_DIR:-/lib/modules/${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}/build}"
530
531 [ -h "${OUTPUT_DIR}" ] && KV_OUT_DIR="$(readlink -f ${OUTPUT_DIR})"
532 [ -d "${OUTPUT_DIR}" ] && KV_OUT_DIR="${OUTPUT_DIR}"
533 if [ -n "${KV_OUT_DIR}" ];
534 then
535 qeinfo "Found kernel object directory:"
536 qeinfo " ${KV_OUT_DIR}"
537 fi
538 # and if we STILL have not got it, then we better just set it to KV_DIR
539 KV_OUT_DIR="${KV_OUT_DIR:-${KV_DIR}}"
540
541 # Grab the kernel release from the output directory.
542 # TODO: we MUST detect kernel.release being out of date, and 'return 1' from
543 # this function.
544 if [ -s "${KV_OUT_DIR}"/include/config/kernel.release ]; then
545 KV_LOCAL=$(<"${KV_OUT_DIR}"/include/config/kernel.release)
546 elif [ -s "${KV_OUT_DIR}"/.kernelrelease ]; then
547 KV_LOCAL=$(<"${KV_OUT_DIR}"/.kernelrelease)
548 else
549 KV_LOCAL=
550 fi
551
552 # KV_LOCAL currently contains the full release; discard the first bits.
553 tmplocal=${KV_LOCAL#${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}}
554
555 # If the updated local version was not changed, the tree is not prepared.
556 # Clear out KV_LOCAL in that case.
557 # TODO: this does not detect a change in the localversion part between
558 # kernel.release and the value that would be generated.
559 if [ "$KV_LOCAL" = "$tmplocal" ]; then
560 KV_LOCAL=
561 else
562 KV_LOCAL=$tmplocal
563 fi
564
565 # And we should set KV_FULL to the full expanded version
566 KV_FULL="${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}${KV_LOCAL}"
567
568 qeinfo "Found sources for kernel version:"
569 qeinfo " ${KV_FULL}"
570
571 return 0
572 }
573
574 # @FUNCTION: get_running_version
575 # @DESCRIPTION:
576 # It gets the version of the current running kernel and the result is the same as get_version() if the
577 # function can find the sources.
578 get_running_version() {
579 KV_FULL=$(uname -r)
580
581 if [[ -f ${ROOT}/lib/modules/${KV_FULL}/source/Makefile && -f ${ROOT}/lib/modules/${KV_FULL}/build/Makefile ]]; then
582 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/source)
583 KBUILD_OUTPUT=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/build)
584 unset KV_FULL
585 get_version
586 return $?
587 elif [[ -f ${ROOT}/lib/modules/${KV_FULL}/source/Makefile ]]; then
588 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/source)
589 unset KV_FULL
590 get_version
591 return $?
592 elif [[ -f ${ROOT}/lib/modules/${KV_FULL}/build/Makefile ]]; then
593 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/build)
594 unset KV_FULL
595 get_version
596 return $?
597 else
598 # This handles a variety of weird kernel versions. Make sure to update
599 # tests/linux-info:get_running_version.sh if you want to change this.
600 local kv_full=${KV_FULL//[-+_]*}
601 KV_MAJOR=$(get_version_component_range 1 ${kv_full})
602 KV_MINOR=$(get_version_component_range 2 ${kv_full})
603 KV_PATCH=$(get_version_component_range 3 ${kv_full})
604 KV_EXTRA="${KV_FULL#${KV_MAJOR}.${KV_MINOR}${KV_PATCH:+.${KV_PATCH}}}"
605 : ${KV_PATCH:=0}
606 fi
607 return 0
608 }
609
610 # This next function is named with the eclass prefix to avoid conflicts with
611 # some old versionator-like eclass functions.
612
613 # @FUNCTION: linux-info_get_any_version
614 # @DESCRIPTION:
615 # This attempts to find the version of the sources, and otherwise falls back to
616 # the version of the running kernel.
617 linux-info_get_any_version() {
618 get_version
619 if [[ $? -ne 0 ]]; then
620 ewarn "Unable to calculate Linux Kernel version for build, attempting to use running version"
621 get_running_version
622 fi
623 }
624
625
626 # ebuild check functions
627 # ---------------------------------------
628
629 # @FUNCTION: check_kernel_built
630 # @DESCRIPTION:
631 # This function verifies that the current kernel sources have been already prepared otherwise it dies.
632 check_kernel_built() {
633 # if we haven't determined the version yet, we need to
634 require_configured_kernel
635 get_version
636
637 local versionh_path
638 if kernel_is -ge 3 7; then
639 versionh_path="include/generated/uapi/linux/version.h"
640 else
641 versionh_path="include/linux/version.h"
642 fi
643
644 if [ ! -f "${KV_OUT_DIR}/${versionh_path}" ]
645 then
646 eerror "These sources have not yet been prepared."
647 eerror "We cannot build against an unprepared tree."
648 eerror "To resolve this, please type the following:"
649 eerror
650 eerror "# cd ${KV_DIR}"
651 eerror "# make oldconfig"
652 eerror "# make modules_prepare"
653 eerror
654 eerror "Then please try merging this module again."
655 die "Kernel sources need compiling first"
656 fi
657 }
658
659 # @FUNCTION: check_modules_supported
660 # @DESCRIPTION:
661 # This function verifies that the current kernel support modules (it checks CONFIG_MODULES=y) otherwise it dies.
662 check_modules_supported() {
663 # if we haven't determined the version yet, we need too.
664 require_configured_kernel
665 get_version
666
667 if ! linux_chkconfig_builtin "MODULES"; then
668 eerror "These sources do not support loading external modules."
669 eerror "to be able to use this module please enable \"Loadable modules support\""
670 eerror "in your kernel, recompile and then try merging this module again."
671 die "No support for external modules in ${KV_FULL} config"
672 fi
673 }
674
675 # @FUNCTION: check_extra_config
676 # @DESCRIPTION:
677 # It checks the kernel config options specified by CONFIG_CHECK. It dies only when a required config option (i.e.
678 # the prefix ~ is not used) doesn't satisfy the directive.
679 check_extra_config() {
680 local config negate die error reworkmodulenames
681 local soft_errors_count=0 hard_errors_count=0 config_required=0
682 # store the value of the QA check, because otherwise we won't catch usages
683 # after if check_extra_config is called AND other direct calls are done
684 # later.
685 local old_LINUX_CONFIG_EXISTS_DONE="${_LINUX_CONFIG_EXISTS_DONE}"
686
687 # if we haven't determined the version yet, we need to
688 linux-info_get_any_version
689
690 # Determine if we really need a .config. The only time when we don't need
691 # one is when all of the CONFIG_CHECK options are prefixed with "~".
692 for config in ${CONFIG_CHECK}; do
693 if [[ "${config:0:1}" != "~" ]]; then
694 config_required=1
695 break
696 fi
697 done
698
699 if [[ ${config_required} == 0 ]]; then
700 # In the case where we don't require a .config, we can now bail out
701 # if the user has no .config as there is nothing to do. Otherwise
702 # code later will cause a failure due to missing .config.
703 if ! linux_config_exists; then
704 ewarn "Unable to check for the following kernel config options due"
705 ewarn "to absence of any configured kernel sources or compiled"
706 ewarn "config:"
707 for config in ${CONFIG_CHECK}; do
708 local_error="ERROR_${config#\~}"
709 msg="${!local_error}"
710 if [[ "x${msg}" == "x" ]]; then
711 local_error="WARNING_${config#\~}"
712 msg="${!local_error}"
713 fi
714 ewarn " - ${config#\~}${msg:+ - }${msg}"
715 done
716 ewarn "You're on your own to make sure they are set if needed."
717 export LINUX_CONFIG_EXISTS_DONE="${old_LINUX_CONFIG_EXISTS_DONE}"
718 return 0
719 fi
720 else
721 require_configured_kernel
722 fi
723
724 einfo "Checking for suitable kernel configuration options..."
725
726 for config in ${CONFIG_CHECK}
727 do
728 # if we specify any fatal, ensure we honor them
729 die=1
730 error=0
731 negate=0
732 reworkmodulenames=0
733
734 if [[ ${config:0:1} == "~" ]]; then
735 die=0
736 config=${config:1}
737 elif [[ ${config:0:1} == "@" ]]; then
738 die=0
739 reworkmodulenames=1
740 config=${config:1}
741 fi
742 if [[ ${config:0:1} == "!" ]]; then
743 negate=1
744 config=${config:1}
745 fi
746
747 if [[ ${negate} == 1 ]]; then
748 linux_chkconfig_present ${config} && error=2
749 elif [[ ${reworkmodulenames} == 1 ]]; then
750 local temp_config="${config//*:}" i n
751 config="${config//:*}"
752 if linux_chkconfig_present ${config}; then
753 for i in ${MODULE_NAMES}; do
754 n="${i//${temp_config}}"
755 [[ -z ${n//\(*} ]] && \
756 MODULE_IGNORE="${MODULE_IGNORE} ${temp_config}"
757 done
758 error=2
759 fi
760 else
761 linux_chkconfig_present ${config} || error=1
762 fi
763
764 if [[ ${error} > 0 ]]; then
765 local report_func="eerror" local_error
766 local_error="ERROR_${config}"
767 local_error="${!local_error}"
768
769 if [[ -z "${local_error}" ]]; then
770 # using old, deprecated format.
771 local_error="${config}_ERROR"
772 local_error="${!local_error}"
773 fi
774 if [[ ${die} == 0 && -z "${local_error}" ]]; then
775 #soft errors can be warnings
776 local_error="WARNING_${config}"
777 local_error="${!local_error}"
778 if [[ -n "${local_error}" ]] ; then
779 report_func="ewarn"
780 fi
781 fi
782
783 if [[ -z "${local_error}" ]]; then
784 [[ ${error} == 1 ]] \
785 && local_error="is not set when it should be." \
786 || local_error="should not be set. But it is."
787 local_error="CONFIG_${config}:\t ${local_error}"
788 fi
789 if [[ ${die} == 0 ]]; then
790 ${report_func} " ${local_error}"
791 soft_errors_count=$[soft_errors_count + 1]
792 else
793 ${report_func} " ${local_error}"
794 hard_errors_count=$[hard_errors_count + 1]
795 fi
796 fi
797 done
798
799 if [[ ${hard_errors_count} > 0 ]]; then
800 eerror "Please check to make sure these options are set correctly."
801 eerror "Failure to do so may cause unexpected problems."
802 eerror "Once you have satisfied these options, please try merging"
803 eerror "this package again."
804 export LINUX_CONFIG_EXISTS_DONE="${old_LINUX_CONFIG_EXISTS_DONE}"
805 die "Incorrect kernel configuration options"
806 elif [[ ${soft_errors_count} > 0 ]]; then
807 ewarn "Please check to make sure these options are set correctly."
808 ewarn "Failure to do so may cause unexpected problems."
809 else
810 eend 0
811 fi
812 export LINUX_CONFIG_EXISTS_DONE="${old_LINUX_CONFIG_EXISTS_DONE}"
813 }
814
815 check_zlibinflate() {
816 # if we haven't determined the version yet, we need to
817 require_configured_kernel
818 get_version
819
820 # although I restructured this code - I really really really dont support it!
821
822 # bug #27882 - zlib routines are only linked into the kernel
823 # if something compiled into the kernel calls them
824 #
825 # plus, for the cloop module, it appears that there's no way
826 # to get cloop.o to include a static zlib if CONFIG_MODVERSIONS
827 # is on
828
829 local INFLATE
830 local DEFLATE
831
832 einfo "Determining the usability of ZLIB_INFLATE support in your kernel"
833
834 ebegin "checking ZLIB_INFLATE"
835 linux_chkconfig_builtin CONFIG_ZLIB_INFLATE
836 eend $?
837 [ "$?" != 0 ] && die
838
839 ebegin "checking ZLIB_DEFLATE"
840 linux_chkconfig_builtin CONFIG_ZLIB_DEFLATE
841 eend $?
842 [ "$?" != 0 ] && die
843
844 local LINENO_START
845 local LINENO_END
846 local SYMBOLS
847 local x
848
849 LINENO_END="$(grep -n 'CONFIG_ZLIB_INFLATE y' ${KV_DIR}/lib/Config.in | cut -d : -f 1)"
850 LINENO_START="$(head -n $LINENO_END ${KV_DIR}/lib/Config.in | grep -n 'if \[' | tail -n 1 | cut -d : -f 1)"
851 (( LINENO_AMOUNT = $LINENO_END - $LINENO_START ))
852 (( LINENO_END = $LINENO_END - 1 ))
853 SYMBOLS="$(head -n $LINENO_END ${KV_DIR}/lib/Config.in | tail -n $LINENO_AMOUNT | sed -e 's/^.*\(CONFIG_[^\" ]*\).*/\1/g;')"
854
855 # okay, now we have a list of symbols
856 # we need to check each one in turn, to see whether it is set or not
857 for x in $SYMBOLS ; do
858 if [ "${!x}" = "y" ]; then
859 # we have a winner!
860 einfo "${x} ensures zlib is linked into your kernel - excellent"
861 return 0
862 fi
863 done
864
865 eerror
866 eerror "This kernel module requires ZLIB library support."
867 eerror "You have enabled zlib support in your kernel, but haven't enabled"
868 eerror "enabled any option that will ensure that zlib is linked into your"
869 eerror "kernel."
870 eerror
871 eerror "Please ensure that you enable at least one of these options:"
872 eerror
873
874 for x in $SYMBOLS ; do
875 eerror " * $x"
876 done
877
878 eerror
879 eerror "Please remember to recompile and install your kernel, and reboot"
880 eerror "into your new kernel before attempting to load this kernel module."
881
882 die "Kernel doesn't include zlib support"
883 }
884
885 ################################
886 # Default pkg_setup
887 # Also used when inheriting linux-mod to force a get_version call
888 # @FUNCTION: linux-info_pkg_setup
889 # @DESCRIPTION:
890 # Force a get_version() call when inherited from linux-mod.eclass and then check if the kernel is configured
891 # to support the options specified in CONFIG_CHECK (if not null)
892 linux-info_pkg_setup() {
893 linux-info_get_any_version
894
895 if kernel_is 2 4; then
896 if [ "$( gcc-major-version )" -eq "4" ] ; then
897 echo
898 ewarn "Be warned !! >=sys-devel/gcc-4.0.0 isn't supported with"
899 ewarn "linux-2.4 (or modules building against a linux-2.4 kernel)!"
900 echo
901 ewarn "Either switch to another gcc-version (via gcc-config) or use a"
902 ewarn "newer kernel that supports gcc-4."
903 echo
904 ewarn "Also be aware that bugreports about gcc-4 not working"
905 ewarn "with linux-2.4 based ebuilds will be closed as INVALID!"
906 echo
907 epause 10
908 fi
909 fi
910
911 [ -n "${CONFIG_CHECK}" ] && check_extra_config;
912 }

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