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| author | David Disseldorp <ddiss@suse.de> | 2025-03-04 16:57:44 +1100 |
|---|---|---|
| committer | Christian Brauner <brauner@kernel.org> | 2025-03-04 09:52:36 +0100 |
| commit | 5f469c4f716746bc8aebf84a34faa5d14e78bf7e (patch) | |
| tree | 185e96a0eacf8e226f3eeda7322fe949de42b20c /init | |
| parent | 2014c95afecee3e76ca4a56956a936e23283f05b (diff) | |
| download | linux-5f469c4f716746bc8aebf84a34faa5d14e78bf7e.tar.gz linux-5f469c4f716746bc8aebf84a34faa5d14e78bf7e.tar.bz2 linux-5f469c4f716746bc8aebf84a34faa5d14e78bf7e.zip | |
init: add initramfs_internal.h
The new header only exports a single unpack function and a CPIO_HDRLEN
constant for future test use.
Signed-off-by: David Disseldorp <ddiss@suse.de>
Link: https://lore.kernel.org/r/20250304061020.9815-2-ddiss@suse.de
Signed-off-by: Christian Brauner <brauner@kernel.org>
Diffstat (limited to 'init')
| -rw-r--r-- | init/initramfs.c | 16 | ||||
| -rw-r--r-- | init/initramfs_internal.h | 8 |
2 files changed, 21 insertions, 3 deletions
diff --git a/init/initramfs.c b/init/initramfs.c index b2f7583bb1f5..002e83ae12ac 100644 --- a/init/initramfs.c +++ b/init/initramfs.c @@ -20,6 +20,7 @@ #include <linux/security.h> #include "do_mounts.h" +#include "initramfs_internal.h" static __initdata bool csum_present; static __initdata u32 io_csum; @@ -256,7 +257,7 @@ static __initdata char *header_buf, *symlink_buf, *name_buf; static int __init do_start(void) { - read_into(header_buf, 110, GotHeader); + read_into(header_buf, CPIO_HDRLEN, GotHeader); return 0; } @@ -497,14 +498,23 @@ static unsigned long my_inptr __initdata; /* index of next byte to be processed #include <linux/decompress/generic.h> -static char * __init unpack_to_rootfs(char *buf, unsigned long len) +/** + * unpack_to_rootfs - decompress and extract an initramfs archive + * @buf: input initramfs archive to extract + * @len: length of initramfs data to process + * + * Returns: NULL for success or an error message string + * + * This symbol shouldn't be used externally. It's available for unit tests. + */ +char * __init unpack_to_rootfs(char *buf, unsigned long len) { long written; decompress_fn decompress; const char *compress_name; static __initdata char msg_buf[64]; - header_buf = kmalloc(110, GFP_KERNEL); + header_buf = kmalloc(CPIO_HDRLEN, GFP_KERNEL); symlink_buf = kmalloc(PATH_MAX + N_ALIGN(PATH_MAX) + 1, GFP_KERNEL); name_buf = kmalloc(N_ALIGN(PATH_MAX), GFP_KERNEL); diff --git a/init/initramfs_internal.h b/init/initramfs_internal.h new file mode 100644 index 000000000000..233dad16b0a0 --- /dev/null +++ b/init/initramfs_internal.h @@ -0,0 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0 +#ifndef __INITRAMFS_INTERNAL_H__ +#define __INITRAMFS_INTERNAL_H__ + +char *unpack_to_rootfs(char *buf, unsigned long len); +#define CPIO_HDRLEN 110 + +#endif |