diff options
Diffstat (limited to 'gnu/build')
| -rw-r--r-- | gnu/build/linux-modules.scm | 72 |
1 files changed, 67 insertions, 5 deletions
diff --git a/gnu/build/linux-modules.scm b/gnu/build/linux-modules.scm index 2af7c33d42..a149eff329 100644 --- a/gnu/build/linux-modules.scm +++ b/gnu/build/linux-modules.scm @@ -31,8 +31,10 @@ #:use-module (ice-9 vlist) #:use-module (ice-9 match) #:use-module (ice-9 rdelim) + #:autoload (ice-9 pretty-print) (pretty-print) #:export (dot-ko ensure-dot-ko + module-formal-name module-aliases module-dependencies module-soft-dependencies @@ -52,6 +54,7 @@ matching-modules missing-modules + write-module-name-database write-module-alias-database write-module-device-database)) @@ -100,6 +103,14 @@ key/value pairs.." (define %not-comma (char-set-complement (char-set #\,))) +(define (module-formal-name file) + "Return the module name of FILE as it appears in its info section. Usually +the module name is the same as the base name of FILE, modulo hyphens and minus +the \".ko\" extension." + (match (assq 'name (modinfo-section-contents file)) + (('name . name) name) + (#f #f))) + (define (module-dependencies file) "Return the list of modules that FILE depends on. The returned list contains module names, not actual file names." @@ -319,12 +330,13 @@ appears in BLACK-LIST are not loaded." "Load MODULES and their dependencies from DIRECTORY, a directory containing the '.ko' files. The '.ko' suffix is automatically added to MODULES if needed." - (define (lookup-module name) - (string-append directory "/" (ensure-dot-ko name))) + (define module-name->file-name + (module-name-lookup directory)) - (for-each (cut load-linux-module* <> - #:lookup-module lookup-module) - (map lookup-module modules))) + (for-each (lambda (module) + (load-linux-module* (module-name->file-name module) + #:lookup-module module-name->file-name)) + modules)) ;;; @@ -502,6 +514,56 @@ are required to access DEVICE." (remove (cut member <> provided) modules)) '())) + +;;; +;;; Module databases. +;;; + +(define (module-name->file-name/guess directory name) + "Guess the file name corresponding to NAME, a module name. That doesn't +always work because sometimes underscores in NAME map to hyphens (e.g., +\"input-leds.ko\"), sometimes not (e.g., \"mac_hid.ko\")." + (string-append directory "/" (ensure-dot-ko name))) + +(define (module-name-lookup directory) + "Return a one argument procedure that takes a module name (e.g., +\"input_leds\") and returns its absolute file name (e.g., +\"/.../input-leds.ko\")." + (catch 'system-error + (lambda () + (define mapping + (call-with-input-file (string-append directory "/modules.name") + read)) + + (lambda (name) + (or (assoc-ref mapping name) + (module-name->file-name/guess directory name)))) + (lambda args + (if (= ENOENT (system-error-errno args)) + (cut module-name->file-name/guess directory <>) + (apply throw args))))) + +(define (write-module-name-database directory) + "Write a database that maps \"module names\" as they appear in the relevant +ELF section of '.ko' files, to actual file names. This format is +Guix-specific. It aims to deal with inconsistent naming, in particular +hyphens vs. underscores." + (define mapping + (map (lambda (file) + (match (module-formal-name file) + (#f (cons (basename file ".ko") file)) + (name (cons name file)))) + (find-files directory "\\.ko$"))) + + (call-with-output-file (string-append directory "/modules.name") + (lambda (port) + (display ";; Module name to file name mapping. +;; +;; This format is Guix-specific; it is not supported by upstream Linux tools. +\n" + port) + (pretty-print mapping port)))) + (define (write-module-alias-database directory) "Traverse the '.ko' files in DIRECTORY and create the corresponding 'modules.alias' file." |