#include <linux/init.h>#include <linux/fs.h>#include <linux/slab.h>#include <linux/types.h>#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){ if (!message) message = x;} /* link hash */ #define N_ALIGN(len) ((((len) + 1) & ~3) + 2) static __initdata struct hash { int ino, minor, major; mode_t mode; struct hash *next; char name[N_ALIGN(PATH_MAX)];} *head[32]; static inline int hash(int major, int minor, int ino){ unsigned long tmp = ino + minor + (major << 3); tmp += tmp >> 5; return tmp & 31;} static char __init *find_link(int major, int minor, int ino, mode_t mode, char *name){ struct hash **p, *q; for (p = head + hash(major, minor, ino); *p; p = &(*p)->next) { if ((*p)->ino != ino) continue; if ((*p)->minor != minor) continue; if ((*p)->major != major) continue; if (((*p)->mode ^ mode) & S_IFMT) continue; return (*p)->name; } q = kmalloc(sizeof(struct hash), GFP_KERNEL); if (!q) panic("can't allocate link hash entry"); q->major = major; q->minor = minor; q->ino = ino; q->mode = mode; strcpy(q->name, name); q->next = NULL; *p = q; return NULL;} static void __init free_hash(void){ struct hash **p, *q; for (p = head; p < head + 32; p++) { while (*p) { q = *p; *p = q->next; 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;static __initdata mode_t mode;static __initdata unsigned long body_len, name_len;static __initdata uid_t uid;static __initdata gid_t gid;static __initdata unsigned rdev; static void __init parse_header(char *s){ unsigned long parsed[12]; char buf[9]; int i; buf[8] = '\0'; for (i = 0, s += 6; i < 12; i++, s += 8) { memcpy(buf, s, 8); parsed[i] = simple_strtoul(buf, NULL, 16); } ino = parsed[0]; mode = parsed[1]; uid = parsed[2]; gid = parsed[3]; nlink = parsed[4]; mtime = parsed[5]; body_len = parsed[6]; major = parsed[7]; minor = parsed[8]; rdev = new_encode_dev(MKDEV(parsed[9], parsed[10])); name_len = parsed[11];} /* FSM */ static __initdata enum state { Start, Collect, GotHeader, SkipIt, GotName, CopyFile, GotSymlink, Reset} state, next_state; static __initdata char *victim;static __initdata unsigned count;static __initdata loff_t this_header, next_header; 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 void __init read_into(char *buf, unsigned size, enum state next){ if (count >= size) { collected = victim; eat(size); state = next; } else { collect = collected = buf; remains = size; next_state = next; state = Collect; }} static __initdata char *header_buf, *symlink_buf, *name_buf; static int __init do_start(void){ read_into(header_buf, 110, GotHeader); return 0;} static int __init do_collect(void){ unsigned n = remains; if (count < n) n = count; memcpy(collect, victim, n); eat(n); collect += n; if ((remains -= n) != 0) return 1; state = next_state; return 0;} 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; state = SkipIt; if (name_len <= 0 || name_len > PATH_MAX) return 0; if (S_ISLNK(mode)) { if (body_len > PATH_MAX) return 0; collect = collected = symlink_buf; remains = N_ALIGN(name_len) + body_len; next_state = GotSymlink; state = Collect; return 0; } if (S_ISREG(mode) || !body_len) read_into(name_buf, N_ALIGN(name_len), GotName); return 0;} static int __init do_skip(void){ if (this_header + count < next_header) { eat(count); return 1; } else { eat(next_header - this_header); state = next_state; return 0; }} static int __init do_reset(void){ while(count && *victim == '\0') eat(1); if (count && (this_header & 3)) error("broken padding"); return 1;} static int __init maybe_link(void){ if (nlink >= 2) { char *old = find_link(major, minor, ino, mode, collected); if (old) return (sys_link(old, collected) < 0) ? -1 : 1; } return 0;} static void __init clean_path(char *path, mode_t mode){ struct stat st; if (!sys_newlstat(path, &st) && (st.st_mode^mode) & S_IFMT) { if (S_ISDIR(st.st_mode)) sys_rmdir(path); else sys_unlink(path); }} static __initdata int wfd; static int __init do_name(void){ state = SkipIt; next_state = Reset; if (strcmp(collected, "TRAILER!!!") == 0) { free_hash(); return 0; } clean_path(collected, mode); if (S_ISREG(mode)) { int ml = maybe_link(); if (ml >= 0) { int openflags = O_WRONLY|O_CREAT; if (ml != 1) openflags |= O_TRUNC; wfd = sys_open(collected, openflags, mode); 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; } } } else if (S_ISDIR(mode)) { 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;} static int __init do_copy(void){ 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; } else { sys_write(wfd, victim, count); body_len -= count; eat(count); return 1; }} static int __init do_symlink(void){ collected[N_ALIGN(name_len) + body_len] = '\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;} static __initdata int (*actions[])(void) = { [Start] = do_start, [Collect] = do_collect, [GotHeader] = do_header, [SkipIt] = do_skip, [GotName] = do_name, [CopyFile] = do_copy, [GotSymlink] = do_symlink, [Reset] = do_reset,}; static int __init write_buffer(char *buf, unsigned len){ count = len; victim = buf; while (!actions[state]()) ; return len - count;} static int __init flush_buffer(void *bufv, unsigned len){ char *buf = (char *) bufv; int written; int origLen = len; if (message) return -1; while ((written = write_buffer(buf, len)) < len && !message) { char c = buf[written]; if (c == '0') { buf += written; len -= written; state = Start; } else if (c == 0) { buf += written; len -= written; state = Reset; } else error("junk in compressed archive"); } return origLen;} static unsigned my_inptr; /* index of next byte to be processed in inbuf */ #include <linux/decompress/generic.h> 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]; 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); if (!header_buf || !symlink_buf || !name_buf) panic("can't allocate buffers"); state = Start; this_header = 0; message = NULL; while (!message && len) { loff_t saved_offset = this_header; if (*buf == '0' && !(this_header & 3)) { state = Start; written = write_buffer(buf, len); buf += written; len -= written; continue; } if (!*buf) { buf++; len--; this_header++; continue; } this_header = 0; 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 compressed archive"); this_header = saved_offset + my_inptr; buf += my_inptr; len -= my_inptr; } 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[];extern unsigned long __initramfs_size;#include <linux/initrd.h>#include <linux/kexec.h> static void __init free_initrd(void){#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_KEXECLines 1–500 of 611. 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#include <linux/init.h> #include <linux/fs.h> #include <linux/slab.h> #include <linux/types.h> #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) { if (!message) message = x; } /* link hash */ #define N_ALIGN(len) ((((len) + 1) & ~3) + 2) static __initdata struct hash { int ino, minor, major; mode_t mode; struct hash *next; char name[N_ALIGN(PATH_MAX)]; } *head[32]; static inline int hash(int major, int minor, int ino) { unsigned long tmp = ino + minor + (major << 3); tmp += tmp >> 5; return tmp & 31; } static char __init *find_link(int major, int minor, int ino, mode_t mode, char *name) { struct hash **p, *q; for (p = head + hash(major, minor, ino); *p; p = &(*p)->next) { if ((*p)->ino != ino) continue; if ((*p)->minor != minor) continue; if ((*p)->major != major) continue; if (((*p)->mode ^ mode) & S_IFMT) continue; return (*p)->name; } q = kmalloc(sizeof(struct hash), GFP_KERNEL); if (!q) panic("can't allocate link hash entry"); q->major = major; q->minor = minor; q->ino = ino; q->mode = mode; strcpy(q->name, name); q->next = NULL; *p = q; return NULL; } static void __init free_hash(void) { struct hash **p, *q; for (p = head; p < head + 32; p++) { while (*p) { q = *p; *p = q->next; 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; static __initdata mode_t mode; static __initdata unsigned long body_len, name_len; static __initdata uid_t uid; static __initdata gid_t gid; static __initdata unsigned rdev; static void __init parse_header(char *s) { unsigned long parsed[12]; char buf[9]; int i; buf[8] = '\0'; for (i = 0, s += 6; i < 12; i++, s += 8) { memcpy(buf, s, 8); parsed[i] = simple_strtoul(buf, NULL, 16); } ino = parsed[0]; mode = parsed[1]; uid = parsed[2]; gid = parsed[3]; nlink = parsed[4]; mtime = parsed[5]; body_len = parsed[6]; major = parsed[7]; minor = parsed[8]; rdev = new_encode_dev(MKDEV(parsed[9], parsed[10])); name_len = parsed[11]; } /* FSM */ static __initdata enum state { Start, Collect, GotHeader, SkipIt, GotName, CopyFile, GotSymlink, Reset } state, next_state; static __initdata char *victim; static __initdata unsigned count; static __initdata loff_t this_header, next_header; 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 void __init read_into(char *buf, unsigned size, enum state next) { if (count >= size) { collected = victim; eat(size); state = next; } else { collect = collected = buf; remains = size; next_state = next; state = Collect; } } static __initdata char *header_buf, *symlink_buf, *name_buf; static int __init do_start(void) { read_into(header_buf, 110, GotHeader); return 0; } static int __init do_collect(void) { unsigned n = remains; if (count < n) n = count; memcpy(collect, victim, n); eat(n); collect += n; if ((remains -= n) != 0) return 1; state = next_state; return 0; } 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; state = SkipIt; if (name_len <= 0 || name_len > PATH_MAX) return 0; if (S_ISLNK(mode)) { if (body_len > PATH_MAX) return 0; collect = collected = symlink_buf; remains = N_ALIGN(name_len) + body_len; next_state = GotSymlink; state = Collect; return 0; } if (S_ISREG(mode) || !body_len) read_into(name_buf, N_ALIGN(name_len), GotName); return 0; } static int __init do_skip(void) { if (this_header + count < next_header) { eat(count); return 1; } else { eat(next_header - this_header); state = next_state; return 0; } } static int __init do_reset(void) { while(count && *victim == '\0') eat(1); if (count && (this_header & 3)) error("broken padding"); return 1; } static int __init maybe_link(void) { if (nlink >= 2) { char *old = find_link(major, minor, ino, mode, collected); if (old) return (sys_link(old, collected) < 0) ? -1 : 1; } return 0; } static void __init clean_path(char *path, mode_t mode) { struct stat st; if (!sys_newlstat(path, &st) && (st.st_mode^mode) & S_IFMT) { if (S_ISDIR(st.st_mode)) sys_rmdir(path); else sys_unlink(path); } } static __initdata int wfd; static int __init do_name(void) { state = SkipIt; next_state = Reset; if (strcmp(collected, "TRAILER!!!") == 0) { free_hash(); return 0; } clean_path(collected, mode); if (S_ISREG(mode)) { int ml = maybe_link(); if (ml >= 0) { int openflags = O_WRONLY|O_CREAT; if (ml != 1) openflags |= O_TRUNC; wfd = sys_open(collected, openflags, mode); 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; } } } else if (S_ISDIR(mode)) { 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; } static int __init do_copy(void) { 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; } else { sys_write(wfd, victim, count); body_len -= count; eat(count); return 1; } } static int __init do_symlink(void) { collected[N_ALIGN(name_len) + body_len] = '\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; } static __initdata int (*actions[])(void) = { [Start] = do_start, [Collect] = do_collect, [GotHeader] = do_header, [SkipIt] = do_skip, [GotName] = do_name, [CopyFile] = do_copy, [GotSymlink] = do_symlink, [Reset] = do_reset, }; static int __init write_buffer(char *buf, unsigned len) { count = len; victim = buf; while (!actions[state]()) ; return len - count; } static int __init flush_buffer(void *bufv, unsigned len) { char *buf = (char *) bufv; int written; int origLen = len; if (message) return -1; while ((written = write_buffer(buf, len)) < len && !message) { char c = buf[written]; if (c == '0') { buf += written; len -= written; state = Start; } else if (c == 0) { buf += written; len -= written; state = Reset; } else error("junk in compressed archive"); } return origLen; } static unsigned my_inptr; /* index of next byte to be processed in inbuf */ #include <linux/decompress/generic.h> 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]; 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); if (!header_buf || !symlink_buf || !name_buf) panic("can't allocate buffers"); state = Start; this_header = 0; message = NULL; while (!message && len) { loff_t saved_offset = this_header; if (*buf == '0' && !(this_header & 3)) { state = Start; written = write_buffer(buf, len); buf += written; len -= written; continue; } if (!*buf) { buf++; len--; this_header++; continue; } this_header = 0; 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 compressed archive"); this_header = saved_offset + my_inptr; buf += my_inptr; len -= my_inptr; } 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[]; extern unsigned long __initramfs_size; #include <linux/initrd.h> #include <linux/kexec.h> static void __init free_initrd(void) { #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