diff options
Diffstat (limited to 'usr')
| -rw-r--r-- | usr/.gitignore | 3 | ||||
| -rw-r--r-- | usr/Kconfig | 56 | ||||
| -rw-r--r-- | usr/Makefile | 113 | ||||
| -rw-r--r-- | usr/gen_init_cpio.c | 223 | ||||
| -rw-r--r-- | usr/initramfs_data.S | 22 |
5 files changed, 301 insertions, 116 deletions
diff --git a/usr/.gitignore b/usr/.gitignore index be186a82e8d..8e48117a3f3 100644 --- a/usr/.gitignore +++ b/usr/.gitignore @@ -4,4 +4,7 @@ gen_init_cpio initramfs_data.cpio initramfs_data.cpio.gz +initramfs_data.cpio.bz2 +initramfs_data.cpio.lzma initramfs_list +include diff --git a/usr/Kconfig b/usr/Kconfig index 07727f3c7ce..2d4c77eecf2 100644 --- a/usr/Kconfig +++ b/usr/Kconfig @@ -17,7 +17,7 @@ config INITRAMFS_SOURCE When multiple directories and files are specified then the initramfs image will be the aggregate of all of them. - See <file:Documentation/early-userspace/README for more details. + See <file:Documentation/early-userspace/README> for more details. If you are not sure, leave it blank. @@ -44,3 +44,57 @@ config INITRAMFS_ROOT_GID owned by group root in the initial ramdisk image. If you are not sure, leave it set to "0". + +config RD_GZIP + bool "Support initial ramdisks compressed using gzip" if EXPERT + default y + depends on BLK_DEV_INITRD + select DECOMPRESS_GZIP + help + Support loading of a gzip encoded initial ramdisk or cpio buffer. + If unsure, say Y. + +config RD_BZIP2 + bool "Support initial ramdisks compressed using bzip2" if EXPERT + default !EXPERT + depends on BLK_DEV_INITRD + select DECOMPRESS_BZIP2 + help + Support loading of a bzip2 encoded initial ramdisk or cpio buffer + If unsure, say N. + +config RD_LZMA + bool "Support initial ramdisks compressed using LZMA" if EXPERT + default !EXPERT + depends on BLK_DEV_INITRD + select DECOMPRESS_LZMA + help + Support loading of a LZMA encoded initial ramdisk or cpio buffer + If unsure, say N. + +config RD_XZ + bool "Support initial ramdisks compressed using XZ" if EXPERT + default !EXPERT + depends on BLK_DEV_INITRD + select DECOMPRESS_XZ + help + Support loading of a XZ encoded initial ramdisk or cpio buffer. + If unsure, say N. + +config RD_LZO + bool "Support initial ramdisks compressed using LZO" if EXPERT + default !EXPERT + depends on BLK_DEV_INITRD + select DECOMPRESS_LZO + help + Support loading of a LZO encoded initial ramdisk or cpio buffer + If unsure, say N. + +config RD_LZ4 + bool "Support initial ramdisks compressed using LZ4" if EXPERT + default !EXPERT + depends on BLK_DEV_INITRD + select DECOMPRESS_LZ4 + help + Support loading of a LZ4 encoded initial ramdisk or cpio buffer + If unsure, say N. diff --git a/usr/Makefile b/usr/Makefile index e2129cb570b..e767f019acc 100644 --- a/usr/Makefile +++ b/usr/Makefile @@ -1,65 +1,74 @@ +# +# kbuild file for usr/ - including initramfs image +# -obj-y := initramfs_data.o +klibcdirs:; +PHONY += klibcdirs -hostprogs-y := gen_init_cpio -clean-files := initramfs_data.cpio.gz initramfs_list +# Bzip2 +suffix_$(CONFIG_RD_BZIP2) = .bz2 -# initramfs_data.o contains the initramfs_data.cpio.gz image. -# The image is included using .incbin, a dependency which is not -# tracked automatically. -$(obj)/initramfs_data.o: $(obj)/initramfs_data.cpio.gz FORCE - -ifdef CONFIG_INITRAMFS_ROOT_UID -gen_initramfs_args += -u $(CONFIG_INITRAMFS_ROOT_UID) -endif - -ifdef CONFIG_INITRAMFS_ROOT_GID -gen_initramfs_args += -g $(CONFIG_INITRAMFS_ROOT_GID) -endif - -# The $(shell echo $(CONFIG_INITRAMFS_SOURCE)) is to remove the -# gratuitous begin and end quotes from the Kconfig string type. -# Internal, escaped quotes in the Kconfig string will loose the -# escape and become active quotes. -quotefixed_initramfs_source := $(shell echo $(CONFIG_INITRAMFS_SOURCE)) - -filechk_initramfs_list = $(CONFIG_SHELL) \ - $(srctree)/scripts/gen_initramfs_list.sh $(gen_initramfs_args) $(quotefixed_initramfs_source) +# Lzma +suffix_$(CONFIG_RD_LZMA) = .lzma -$(obj)/initramfs_list: $(obj)/Makefile FORCE - $(call filechk,initramfs_list) +# XZ +suffix_$(CONFIG_RD_XZ) = .xz -quiet_cmd_cpio = CPIO $@ - cmd_cpio = ./$< $(obj)/initramfs_list > $@ +# Lzo +suffix_$(CONFIG_RD_LZO) = .lzo +# Lz4 +suffix_$(CONFIG_RD_LZ4) = .lz4 -# Check if the INITRAMFS_SOURCE is a cpio archive -ifneq (,$(findstring .cpio,$(quotefixed_initramfs_source))) +# Gzip +suffix_$(CONFIG_RD_GZIP) = .gz -# INITRAMFS_SOURCE has a cpio archive - verify that it's a single file -ifneq (1,$(words $(quotefixed_initramfs_source))) -$(error Only a single file may be specified in CONFIG_INITRAMFS_SOURCE (="$(quotefixed_initramfs_source)") when a cpio archive is directly specified.) -endif -# Now use the cpio archive directly -initramfs_data_cpio = $(quotefixed_initramfs_source) -targets += $(quotefixed_initramfs_source) - -else +AFLAGS_initramfs_data.o += -DINITRAMFS_IMAGE="usr/initramfs_data.cpio$(suffix_y)" -# INITRAMFS_SOURCE is not a cpio archive - create one -$(obj)/initramfs_data.cpio: $(obj)/gen_init_cpio \ - $(initramfs-y) $(obj)/initramfs_list FORCE - $(call if_changed,cpio) - -targets += initramfs_data.cpio -initramfs_data_cpio = $(obj)/initramfs_data.cpio +# Generate builtin.o based on initramfs_data.o +obj-$(CONFIG_BLK_DEV_INITRD) := initramfs_data.o +# initramfs_data.o contains the compressed initramfs_data.cpio image. +# The image is included using .incbin, a dependency which is not +# tracked automatically. +$(obj)/initramfs_data.o: $(obj)/initramfs_data.cpio$(suffix_y) FORCE + +##### +# Generate the initramfs cpio archive + +hostprogs-y := gen_init_cpio +initramfs := $(CONFIG_SHELL) $(srctree)/scripts/gen_initramfs_list.sh +ramfs-input := $(if $(filter-out "",$(CONFIG_INITRAMFS_SOURCE)), \ + $(shell echo $(CONFIG_INITRAMFS_SOURCE)),-d) +ramfs-args := \ + $(if $(CONFIG_INITRAMFS_ROOT_UID), -u $(CONFIG_INITRAMFS_ROOT_UID)) \ + $(if $(CONFIG_INITRAMFS_ROOT_GID), -g $(CONFIG_INITRAMFS_ROOT_GID)) + +# .initramfs_data.cpio.d is used to identify all files included +# in initramfs and to detect if any files are added/removed. +# Removed files are identified by directory timestamp being updated +# The dependency list is generated by gen_initramfs.sh -l +ifneq ($(wildcard $(obj)/.initramfs_data.cpio.d),) + include $(obj)/.initramfs_data.cpio.d endif - -$(obj)/initramfs_data.cpio.gz: $(initramfs_data_cpio) FORCE - $(call if_changed,gzip) - -targets += initramfs_data.cpio.gz - +quiet_cmd_initfs = GEN $@ + cmd_initfs = $(initramfs) -o $@ $(ramfs-args) $(ramfs-input) + +targets := initramfs_data.cpio.gz initramfs_data.cpio.bz2 \ + initramfs_data.cpio.lzma initramfs_data.cpio.xz \ + initramfs_data.cpio.lzo initramfs_data.cpio.lz4 \ + initramfs_data.cpio +# do not try to update files included in initramfs +$(deps_initramfs): ; + +$(deps_initramfs): klibcdirs +# We rebuild initramfs_data.cpio if: +# 1) Any included file is newer then initramfs_data.cpio +# 2) There are changes in which files are included (added or deleted) +# 3) If gen_init_cpio are newer than initramfs_data.cpio +# 4) arguments to gen_initramfs.sh changes +$(obj)/initramfs_data.cpio$(suffix_y): $(obj)/gen_init_cpio $(deps_initramfs) klibcdirs + $(Q)$(initramfs) -l $(ramfs-input) > $(obj)/.initramfs_data.cpio.d + $(call if_changed,initfs) diff --git a/usr/gen_init_cpio.c b/usr/gen_init_cpio.c index 33dbcbf77c5..225ad244cf8 100644 --- a/usr/gen_init_cpio.c +++ b/usr/gen_init_cpio.c @@ -14,6 +14,7 @@ * Original work by Jeff Garzik * * External file lists, symlink, pipe and fifo support by Thayne Harbaugh + * Hard link support by Luciano Rocha */ #define xstr(s) #s @@ -21,6 +22,7 @@ static unsigned int offset; static unsigned int ino = 721; +static time_t default_mtime; struct file_handler { const char *type; @@ -101,8 +103,9 @@ static int cpio_mkslink(const char *name, const char *target, unsigned int mode, uid_t uid, gid_t gid) { char s[256]; - time_t mtime = time(NULL); + if (name[0] == '/') + name++; sprintf(s,"%s%08X%08X%08lX%08lX%08X%08lX" "%08X%08X%08X%08X%08X%08X%08X", "070701", /* magic */ @@ -111,7 +114,7 @@ static int cpio_mkslink(const char *name, const char *target, (long) uid, /* uid */ (long) gid, /* gid */ 1, /* nlink */ - (long) mtime, /* mtime */ + (long) default_mtime, /* mtime */ (unsigned)strlen(target)+1, /* filesize */ 3, /* major */ 1, /* minor */ @@ -149,8 +152,9 @@ static int cpio_mkgeneric(const char *name, unsigned int mode, uid_t uid, gid_t gid) { char s[256]; - time_t mtime = time(NULL); + if (name[0] == '/') + name++; sprintf(s,"%s%08X%08X%08lX%08lX%08X%08lX" "%08X%08X%08X%08X%08X%08X%08X", "070701", /* magic */ @@ -159,7 +163,7 @@ static int cpio_mkgeneric(const char *name, unsigned int mode, (long) uid, /* uid */ (long) gid, /* gid */ 2, /* nlink */ - (long) mtime, /* mtime */ + (long) default_mtime, /* mtime */ 0, /* filesize */ 3, /* major */ 1, /* minor */ @@ -237,13 +241,14 @@ static int cpio_mknod(const char *name, unsigned int mode, unsigned int maj, unsigned int min) { char s[256]; - time_t mtime = time(NULL); if (dev_type == 'b') mode |= S_IFBLK; else mode |= S_IFCHR; + if (name[0] == '/') + name++; sprintf(s,"%s%08X%08X%08lX%08lX%08X%08lX" "%08X%08X%08X%08X%08X%08X%08X", "070701", /* magic */ @@ -252,7 +257,7 @@ static int cpio_mknod(const char *name, unsigned int mode, (long) uid, /* uid */ (long) gid, /* gid */ 1, /* nlink */ - (long) mtime, /* mtime */ + (long) default_mtime, /* mtime */ 0, /* filesize */ 3, /* major */ 1, /* minor */ @@ -286,31 +291,34 @@ static int cpio_mknod_line(const char *line) return rc; } -/* Not marked static to keep the compiler quiet, as no one uses this yet... */ static int cpio_mkfile(const char *name, const char *location, - unsigned int mode, uid_t uid, gid_t gid) + unsigned int mode, uid_t uid, gid_t gid, + unsigned int nlinks) { char s[256]; char *filebuf = NULL; struct stat buf; + long size; int file = -1; int retval; int rc = -1; + int namesize; + unsigned int i; mode |= S_IFREG; - retval = stat (location, &buf); - if (retval) { - fprintf (stderr, "File %s could not be located\n", location); - goto error; - } - file = open (location, O_RDONLY); if (file < 0) { fprintf (stderr, "File %s could not be opened for reading\n", location); goto error; } + retval = fstat(file, &buf); + if (retval) { + fprintf(stderr, "File %s could not be stat()'ed\n", location); + goto error; + } + filebuf = malloc(buf.st_size); if (!filebuf) { fprintf (stderr, "out of memory\n"); @@ -323,29 +331,46 @@ static int cpio_mkfile(const char *name, const char *location, goto error; } - sprintf(s,"%s%08X%08X%08lX%08lX%08X%08lX" - "%08X%08X%08X%08X%08X%08X%08X", - "070701", /* magic */ - ino++, /* ino */ - mode, /* mode */ - (long) uid, /* uid */ - (long) gid, /* gid */ - 1, /* nlink */ - (long) buf.st_mtime, /* mtime */ - (int) buf.st_size, /* filesize */ - 3, /* major */ - 1, /* minor */ - 0, /* rmajor */ - 0, /* rminor */ - (unsigned)strlen(name) + 1,/* namesize */ - 0); /* chksum */ - push_hdr(s); - push_string(name); - push_pad(); + size = 0; + for (i = 1; i <= nlinks; i++) { + /* data goes on last link */ + if (i == nlinks) size = buf.st_size; + + if (name[0] == '/') + name++; + namesize = strlen(name) + 1; + sprintf(s,"%s%08X%08X%08lX%08lX%08X%08lX" + "%08lX%08X%08X%08X%08X%08X%08X", + "070701", /* magic */ + ino, /* ino */ + mode, /* mode */ + (long) uid, /* uid */ + (long) gid, /* gid */ + nlinks, /* nlink */ + (long) buf.st_mtime, /* mtime */ + size, /* filesize */ + 3, /* major */ + 1, /* minor */ + 0, /* rmajor */ + 0, /* rminor */ + namesize, /* namesize */ + 0); /* chksum */ + push_hdr(s); + push_string(name); + push_pad(); + + if (size) { + if (fwrite(filebuf, size, 1, stdout) != 1) { + fprintf(stderr, "writing filebuf failed\n"); + goto error; + } + offset += size; + push_pad(); + } - fwrite(filebuf, buf.st_size, 1, stdout); - offset += buf.st_size; - push_pad(); + name += namesize; + } + ino++; rc = 0; error: @@ -354,49 +379,102 @@ error: return rc; } +static char *cpio_replace_env(char *new_location) +{ + char expanded[PATH_MAX + 1]; + char *start, *end, *var; + + while ((start = strstr(new_location, "${")) && + (end = strchr(start + 2, '}'))) { + *start = *end = 0; + var = getenv(start + 2); + snprintf(expanded, sizeof expanded, "%s%s%s", + new_location, var ? var : "", end + 1); + strcpy(new_location, expanded); + } + + return new_location; +} + static int cpio_mkfile_line(const char *line) { char name[PATH_MAX + 1]; + char *dname = NULL; /* malloc'ed buffer for hard links */ char location[PATH_MAX + 1]; unsigned int mode; int uid; int gid; + int nlinks = 1; + int end = 0, dname_len = 0; int rc = -1; - if (5 != sscanf(line, "%" str(PATH_MAX) "s %" str(PATH_MAX) "s %o %d %d", name, location, &mode, &uid, &gid)) { + if (5 > sscanf(line, "%" str(PATH_MAX) "s %" str(PATH_MAX) + "s %o %d %d %n", + name, location, &mode, &uid, &gid, &end)) { fprintf(stderr, "Unrecognized file format '%s'", line); goto fail; } - rc = cpio_mkfile(name, location, mode, uid, gid); + if (end && isgraph(line[end])) { + int len; + int nend; + + dname = malloc(strlen(line)); + if (!dname) { + fprintf (stderr, "out of memory (%d)\n", dname_len); + goto fail; + } + + dname_len = strlen(name) + 1; + memcpy(dname, name, dname_len); + + do { + nend = 0; + if (sscanf(line + end, "%" str(PATH_MAX) "s %n", + name, &nend) < 1) + break; + len = strlen(name) + 1; + memcpy(dname + dname_len, name, len); + dname_len += len; + nlinks++; + end += nend; + } while (isgraph(line[end])); + } else { + dname = name; + } + rc = cpio_mkfile(dname, cpio_replace_env(location), + mode, uid, gid, nlinks); fail: + if (dname_len) free(dname); return rc; } -void usage(const char *prog) +static void usage(const char *prog) { fprintf(stderr, "Usage:\n" - "\t%s <cpio_list>\n" + "\t%s [-t <timestamp>] <cpio_list>\n" "\n" "<cpio_list> is a file containing newline separated entries that\n" "describe the files to be included in the initramfs archive:\n" "\n" "# a comment\n" - "file <name> <location> <mode> <uid> <gid>\n" + "file <name> <location> <mode> <uid> <gid> [<hard links>]\n" "dir <name> <mode> <uid> <gid>\n" "nod <name> <mode> <uid> <gid> <dev_type> <maj> <min>\n" "slink <name> <target> <mode> <uid> <gid>\n" "pipe <name> <mode> <uid> <gid>\n" "sock <name> <mode> <uid> <gid>\n" "\n" - "<name> name of the file/dir/nod/etc in the archive\n" - "<location> location of the file in the current filesystem\n" - "<target> link target\n" - "<mode> mode/permissions of the file\n" - "<uid> user id (0=root)\n" - "<gid> group id (0=root)\n" - "<dev_type> device type (b=block, c=character)\n" - "<maj> major number of nod\n" - "<min> minor number of nod\n" + "<name> name of the file/dir/nod/etc in the archive\n" + "<location> location of the file in the current filesystem\n" + " expands shell variables quoted with ${}\n" + "<target> link target\n" + "<mode> mode/permissions of the file\n" + "<uid> user id (0=root)\n" + "<gid> group id (0=root)\n" + "<dev_type> device type (b=block, c=character)\n" + "<maj> major number of nod\n" + "<min> minor number of nod\n" + "<hard links> space separated list of other links to file\n" "\n" "example:\n" "# A simple initramfs\n" @@ -404,7 +482,11 @@ void usage(const char *prog) "nod /dev/console 0600 0 0 c 5 1\n" "dir /root 0700 0 0\n" "dir /sbin 0755 0 0\n" - "file /sbin/kinit /usr/src/klibc/kinit/kinit 0755 0 0\n", + "file /sbin/kinit /usr/src/klibc/kinit/kinit 0755 0 0\n" + "\n" + "<timestamp> is time in seconds since Epoch that will be used\n" + "as mtime for symlinks, special files and directories. The default\n" + "is to use the current time for these entries.\n", prog); } @@ -442,15 +524,42 @@ int main (int argc, char *argv[]) char *args, *type; int ec = 0; int line_nr = 0; + const char *filename; + + default_mtime = time(NULL); + while (1) { + int opt = getopt(argc, argv, "t:h"); + char *invalid; + + if (opt == -1) + break; + switch (opt) { + case 't': + default_mtime = strtol(optarg, &invalid, 10); + if (!*optarg || *invalid) { + fprintf(stderr, "Invalid timestamp: %s\n", + optarg); + usage(argv[0]); + exit(1); + } + break; + case 'h': + case '?': + usage(argv[0]); + exit(opt == 'h' ? 0 : 1); + } + } - if (2 != argc) { + if (argc - optind != 1) { usage(argv[0]); exit(1); } - - if (! (cpio_list = fopen(argv[1], "r"))) { + filename = argv[optind]; + if (!strcmp(filename, "-")) + cpio_list = stdin; + else if (!(cpio_list = fopen(filename, "r"))) { fprintf(stderr, "ERROR: unable to open '%s': %s\n\n", - argv[1], strerror(errno)); + filename, strerror(errno)); usage(argv[0]); exit(1); } @@ -471,6 +580,7 @@ int main (int argc, char *argv[]) "ERROR: incorrect format, could not locate file type line %d: '%s'\n", line_nr, line); ec = -1; + break; } if ('\n' == *type) { @@ -506,7 +616,8 @@ int main (int argc, char *argv[]) line_nr, line); } } - cpio_trailer(); + if (ec == 0) + cpio_trailer(); exit(ec); } diff --git a/usr/initramfs_data.S b/usr/initramfs_data.S index c2e1ad424f4..c14322d1c0c 100644 --- a/usr/initramfs_data.S +++ b/usr/initramfs_data.S @@ -11,11 +11,7 @@ -T initramfs_data.scr initramfs_data.cpio.gz -o initramfs_data.o ld -m elf_i386 -r -o built-in.o initramfs_data.o - initramfs_data.scr looks like this: -SECTIONS -{ - .init.ramfs : { *(.data) } -} + For including the .init.ramfs sections, see include/asm-generic/vmlinux.lds. The above example is for i386 - the parameters vary from architectures. Eventually look up LDFLAGS_BLOB in an older version of the @@ -25,6 +21,18 @@ SECTIONS in the ELF header, as required by certain architectures. */ -.section .init.ramfs,"a" -.incbin "usr/initramfs_data.cpio.gz" +#include <linux/stringify.h> +#include <asm-generic/vmlinux.lds.h> +.section .init.ramfs,"a" +__irf_start: +.incbin __stringify(INITRAMFS_IMAGE) +__irf_end: +.section .init.ramfs.info,"a" +.globl VMLINUX_SYMBOL(__initramfs_size) +VMLINUX_SYMBOL(__initramfs_size): +#ifdef CONFIG_64BIT + .quad __irf_end - __irf_start +#else + .long __irf_end - __irf_start +#endif |