#include <linux/fcntl.h>
#include <linux/delay.h>
#include <linux/string.h>
+#include <linux/dirent.h>
#include <linux/syscalls.h>
+#include <linux/utime.h>
static __initdata char *message;
static void __init error(char *x)
message = x;
}
-static void __init *malloc(size_t size)
-{
- return kmalloc(size, GFP_KERNEL);
-}
-
-static void __init free(void *where)
-{
- kfree(where);
-}
-
/* link hash */
#define N_ALIGN(len) ((((len) + 1) & ~3) + 2)
continue;
return (*p)->name;
}
- q = (struct hash *)malloc(sizeof(struct hash));
+ q = kmalloc(sizeof(struct hash), GFP_KERNEL);
if (!q)
panic("can't allocate link hash entry");
q->major = major;
while (*p) {
q = *p;
*p = q->next;
- free(q);
+ kfree(q);
}
}
}
+static long __init do_utime(char __user *filename, time_t mtime)
+{
+ struct timespec t[2];
+
+ t[0].tv_sec = mtime;
+ t[0].tv_nsec = 0;
+ t[1].tv_sec = mtime;
+ t[1].tv_nsec = 0;
+
+ return do_utimes(AT_FDCWD, filename, t, AT_SYMLINK_NOFOLLOW);
+}
+
+static __initdata LIST_HEAD(dir_list);
+struct dir_entry {
+ struct list_head list;
+ char *name;
+ time_t mtime;
+};
+
+static void __init dir_add(const char *name, time_t mtime)
+{
+ struct dir_entry *de = kmalloc(sizeof(struct dir_entry), GFP_KERNEL);
+ if (!de)
+ panic("can't allocate dir_entry buffer");
+ INIT_LIST_HEAD(&de->list);
+ de->name = kstrdup(name, GFP_KERNEL);
+ de->mtime = mtime;
+ list_add(&de->list, &dir_list);
+}
+
+static void __init dir_utime(void)
+{
+ struct dir_entry *de, *tmp;
+ list_for_each_entry_safe(de, tmp, &dir_list, list) {
+ list_del(&de->list);
+ do_utime(de->name, de->mtime);
+ kfree(de->name);
+ kfree(de);
+ }
+}
+
+static __initdata time_t mtime;
+
/* cpio header parsing */
static __initdata unsigned long ino, major, minor, nlink;
uid = parsed[2];
gid = parsed[3];
nlink = parsed[4];
+ mtime = parsed[5];
body_len = parsed[6];
major = parsed[7];
minor = parsed[8];
static __initdata unsigned count;
static __initdata loff_t this_header, next_header;
-static __initdata int dry_run;
-
-static inline void eat(unsigned n)
+static inline void __init eat(unsigned n)
{
victim += n;
this_header += n;
count -= n;
}
+static __initdata char *vcollected;
static __initdata char *collected;
static __initdata int remains;
static __initdata char *collect;
static int __init do_header(void)
{
+ if (memcmp(collected, "070707", 6)==0) {
+ error("incorrect cpio method used: use -H newc option");
+ return 1;
+ }
if (memcmp(collected, "070701", 6)) {
error("no cpio magic");
return 1;
parse_header(collected);
next_header = this_header + N_ALIGN(name_len) + body_len;
next_header = (next_header + 3) & ~3;
- if (dry_run) {
- read_into(name_buf, N_ALIGN(name_len), GotName);
- return 0;
- }
state = SkipIt;
if (name_len <= 0 || name_len > PATH_MAX)
return 0;
free_hash();
return 0;
}
- if (dry_run)
- return 0;
clean_path(collected, mode);
if (S_ISREG(mode)) {
int ml = maybe_link();
if (wfd >= 0) {
sys_fchown(wfd, uid, gid);
sys_fchmod(wfd, mode);
+ if (body_len)
+ sys_ftruncate(wfd, body_len);
+ vcollected = kstrdup(collected, GFP_KERNEL);
state = CopyFile;
}
}
sys_mkdir(collected, mode);
sys_chown(collected, uid, gid);
sys_chmod(collected, mode);
+ dir_add(collected, mtime);
} else if (S_ISBLK(mode) || S_ISCHR(mode) ||
S_ISFIFO(mode) || S_ISSOCK(mode)) {
if (maybe_link() == 0) {
sys_mknod(collected, mode, rdev);
sys_chown(collected, uid, gid);
sys_chmod(collected, mode);
+ do_utime(collected, mtime);
}
}
return 0;
if (count >= body_len) {
sys_write(wfd, victim, body_len);
sys_close(wfd);
+ do_utime(vcollected, mtime);
+ kfree(vcollected);
eat(body_len);
state = SkipIt;
return 0;
clean_path(collected, 0);
sys_symlink(collected + N_ALIGN(name_len), collected);
sys_lchown(collected, uid, gid);
+ do_utime(collected, mtime);
state = SkipIt;
next_state = Reset;
return 0;
return len - count;
}
-static void __init flush_buffer(char *buf, unsigned len)
+static int __init flush_buffer(void *bufv, unsigned len)
{
+ char *buf = (char *) bufv;
int written;
+ int origLen = len;
if (message)
- return;
+ return -1;
while ((written = write_buffer(buf, len)) < len && !message) {
char c = buf[written];
if (c == '0') {
} else
error("junk in compressed archive");
}
+ return origLen;
}
-/*
- * gzip declarations
- */
-
-#define OF(args) args
-
-#ifndef memzero
-#define memzero(s, n) memset ((s), 0, (n))
-#endif
-
-typedef unsigned char uch;
-typedef unsigned short ush;
-typedef unsigned long ulg;
-
-#define WSIZE 0x8000 /* window size--must be a power of two, and */
- /* at least 32K for zip's deflate method */
-
-static uch *inbuf;
-static uch *window;
-
-static unsigned insize; /* valid bytes in inbuf */
-static unsigned inptr; /* index of next byte to be processed in inbuf */
-static unsigned outcnt; /* bytes in output buffer */
-static long bytes_out;
-
-#define get_byte() (inptr < insize ? inbuf[inptr++] : -1)
-
-/* Diagnostic functions (stubbed out) */
-#define Assert(cond,msg)
-#define Trace(x)
-#define Tracev(x)
-#define Tracevv(x)
-#define Tracec(c,x)
-#define Tracecv(c,x)
-
-#define STATIC static
-#define INIT __init
-
-static void __init flush_window(void);
-static void __init error(char *m);
-static void __init gzip_mark(void **);
-static void __init gzip_release(void **);
+static unsigned my_inptr; /* index of next byte to be processed in inbuf */
-#include "../lib/inflate.c"
+#include <linux/decompress/generic.h>
-static void __init gzip_mark(void **ptr)
+static char * __init unpack_to_rootfs(char *buf, unsigned len)
{
-}
+ int written, res;
+ decompress_fn decompress;
+ const char *compress_name;
+ static __initdata char msg_buf[64];
-static void __init gzip_release(void **ptr)
-{
-}
-
-/* ===========================================================================
- * Write the output window window[0..outcnt-1] and update crc and bytes_out.
- * (Used for the decompressed data only.)
- */
-static void __init flush_window(void)
-{
- ulg c = crc; /* temporary variable */
- unsigned n;
- uch *in, ch;
-
- flush_buffer(window, outcnt);
- in = window;
- for (n = 0; n < outcnt; n++) {
- ch = *in++;
- c = crc_32_tab[((int)c ^ ch) & 0xff] ^ (c >> 8);
- }
- crc = c;
- bytes_out += (ulg)outcnt;
- outcnt = 0;
-}
+ header_buf = kmalloc(110, GFP_KERNEL);
+ symlink_buf = kmalloc(PATH_MAX + N_ALIGN(PATH_MAX) + 1, GFP_KERNEL);
+ name_buf = kmalloc(N_ALIGN(PATH_MAX), GFP_KERNEL);
-static char * __init unpack_to_rootfs(char *buf, unsigned len, int check_only)
-{
- int written;
- dry_run = check_only;
- header_buf = malloc(110);
- symlink_buf = malloc(PATH_MAX + N_ALIGN(PATH_MAX) + 1);
- name_buf = malloc(N_ALIGN(PATH_MAX));
- window = malloc(WSIZE);
- if (!window || !header_buf || !symlink_buf || !name_buf)
+ if (!header_buf || !symlink_buf || !name_buf)
panic("can't allocate buffers");
+
state = Start;
this_header = 0;
message = NULL;
continue;
}
this_header = 0;
- insize = len;
- inbuf = buf;
- inptr = 0;
- outcnt = 0; /* bytes in output buffer */
- bytes_out = 0;
- crc = (ulg)0xffffffffL; /* shift register contents */
- makecrc();
- gunzip();
+ decompress = decompress_method(buf, len, &compress_name);
+ if (decompress) {
+ res = decompress(buf, len, NULL, flush_buffer, NULL,
+ &my_inptr, error);
+ if (res)
+ error("decompressor failed");
+ } else if (compress_name) {
+ if (!message) {
+ snprintf(msg_buf, sizeof msg_buf,
+ "compression method %s not configured",
+ compress_name);
+ message = msg_buf;
+ }
+ } else
+ error("junk in compressed archive");
if (state != Reset)
- error("junk in gzipped archive");
- this_header = saved_offset + inptr;
- buf += inptr;
- len -= inptr;
+ error("junk in compressed archive");
+ this_header = saved_offset + my_inptr;
+ buf += my_inptr;
+ len -= my_inptr;
}
- free(window);
- free(name_buf);
- free(symlink_buf);
- free(header_buf);
+ dir_utime();
+ kfree(name_buf);
+ kfree(symlink_buf);
+ kfree(header_buf);
return message;
}
+static int __initdata do_retain_initrd;
+
+static int __init retain_initrd_param(char *str)
+{
+ if (*str)
+ return 0;
+ do_retain_initrd = 1;
+ return 1;
+}
+__setup("retain_initrd", retain_initrd_param);
+
extern char __initramfs_start[], __initramfs_end[];
-#ifdef CONFIG_BLK_DEV_INITRD
#include <linux/initrd.h>
#include <linux/kexec.h>
#ifdef CONFIG_KEXEC
unsigned long crashk_start = (unsigned long)__va(crashk_res.start);
unsigned long crashk_end = (unsigned long)__va(crashk_res.end);
+#endif
+ if (do_retain_initrd)
+ goto skip;
+#ifdef CONFIG_KEXEC
/*
* If the initrd region is overlapped with crashkernel reserved region,
* free only memory that is not part of crashkernel region.
} else
#endif
free_initrd_mem(initrd_start, initrd_end);
-
+skip:
initrd_start = 0;
initrd_end = 0;
}
+#ifdef CONFIG_BLK_DEV_RAM
+#define BUF_SIZE 1024
+static void __init clean_rootfs(void)
+{
+ int fd;
+ void *buf;
+ struct linux_dirent64 *dirp;
+ int num;
+
+ fd = sys_open("/", O_RDONLY, 0);
+ WARN_ON(fd < 0);
+ if (fd < 0)
+ return;
+ buf = kzalloc(BUF_SIZE, GFP_KERNEL);
+ WARN_ON(!buf);
+ if (!buf) {
+ sys_close(fd);
+ return;
+ }
+
+ dirp = buf;
+ num = sys_getdents64(fd, dirp, BUF_SIZE);
+ while (num > 0) {
+ while (num > 0) {
+ struct stat st;
+ int ret;
+
+ ret = sys_newlstat(dirp->d_name, &st);
+ WARN_ON_ONCE(ret);
+ if (!ret) {
+ if (S_ISDIR(st.st_mode))
+ sys_rmdir(dirp->d_name);
+ else
+ sys_unlink(dirp->d_name);
+ }
+
+ num -= dirp->d_reclen;
+ dirp = (void *)dirp + dirp->d_reclen;
+ }
+ dirp = buf;
+ memset(buf, 0, BUF_SIZE);
+ num = sys_getdents64(fd, dirp, BUF_SIZE);
+ }
+
+ sys_close(fd);
+ kfree(buf);
+}
#endif
-void __init populate_rootfs(void)
+static int __init populate_rootfs(void)
{
char *err = unpack_to_rootfs(__initramfs_start,
- __initramfs_end - __initramfs_start, 0);
+ __initramfs_end - __initramfs_start);
if (err)
- panic(err);
-#ifdef CONFIG_BLK_DEV_INITRD
+ panic(err); /* Failed to decompress INTERNAL initramfs */
if (initrd_start) {
#ifdef CONFIG_BLK_DEV_RAM
int fd;
- printk(KERN_INFO "checking if image is initramfs...");
+ printk(KERN_INFO "Trying to unpack rootfs image as initramfs...\n");
err = unpack_to_rootfs((char *)initrd_start,
- initrd_end - initrd_start, 1);
+ initrd_end - initrd_start);
if (!err) {
- printk(" it is\n");
- unpack_to_rootfs((char *)initrd_start,
- initrd_end - initrd_start, 0);
free_initrd();
- return;
+ return 0;
+ } else {
+ clean_rootfs();
+ unpack_to_rootfs(__initramfs_start,
+ __initramfs_end - __initramfs_start);
}
- printk("it isn't (%s); looks like an initrd\n", err);
+ printk(KERN_INFO "rootfs image is not initramfs (%s)"
+ "; looks like an initrd\n", err);
fd = sys_open("/initrd.image", O_WRONLY|O_CREAT, 0700);
if (fd >= 0) {
sys_write(fd, (char *)initrd_start,
free_initrd();
}
#else
- printk(KERN_INFO "Unpacking initramfs...");
+ printk(KERN_INFO "Unpacking initramfs...\n");
err = unpack_to_rootfs((char *)initrd_start,
- initrd_end - initrd_start, 0);
+ initrd_end - initrd_start);
if (err)
- panic(err);
- printk(" done\n");
+ printk(KERN_EMERG "Initramfs unpacking failed: %s\n", err);
free_initrd();
#endif
}
-#endif
+ return 0;
}
+rootfs_initcall(populate_rootfs);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff