Support odc, newc and bigendian cpio formats.
* Makefile.util.def (libgrubmods): Add odc.c, newc.c and cpio_be.c. * grub-core/Makefile.core.def (newc): New module. (odc): Likewise. (cpio_be): Likewise. * grub-core/fs/cpio.c (ALIGN_CPIO): New macro. (MAGIC): Likewise. (MAGIC2): Likewise. (head) [MODE_ODC]: Adapt for the format. (head) [MODE_NEWC]: Likewise. (head) [!MODE_*]: Write fields of interest as arrays. (MAGIC_USTAR): Removed. (read_number) [MODE_NEWC]: Change to hex. (read_number) [!MODE_*]: Parse binary arrays. (grub_cpio_find_file): Factor out the code for better structure and always use read_number. (grub_cpio_mount): Use MAGIC and MAGIC2. (grub_cpio_dir): Exit on first hook non-0 return. (grub_cpio_fs) [MODE_ODC]: Set name to odc. (grub_cpio_fs) [MODE_NEWC]: Set name to newc. (GRUB_MOD_INIT) [MODE_ODC]: Set name to odc. (GRUB_MOD_INIT) [MODE_NEWC]: Set name to newc. (GRUB_MOD_FINI) [MODE_ODC]: Set name to odc. (GRUB_MOD_FINI) [MODE_NEWC]: Set name to newc. * grub-core/fs/newc.c: New file. * grub-core/fs/odc.c: Likewise. * grub-core/fs/cpio_be.c: Likewise.
This commit is contained in:
Vladimir 'phcoder' Serbinenko
parent
58eba9eec7
commit
a1a8b1b90a
7 changed files with 181 additions and 36 deletions
31
ChangeLog
31
ChangeLog
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@ -1,3 +1,34 @@
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2011-12-23 Vladimir Serbinenko <phcoder@gmail.com>
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Support odc, newc and bigendian cpio formats.
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* Makefile.util.def (libgrubmods): Add odc.c, newc.c and cpio_be.c.
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* grub-core/Makefile.core.def (newc): New module.
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(odc): Likewise.
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(cpio_be): Likewise.
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* grub-core/fs/cpio.c (ALIGN_CPIO): New macro.
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(MAGIC): Likewise.
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(MAGIC2): Likewise.
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(head) [MODE_ODC]: Adapt for the format.
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(head) [MODE_NEWC]: Likewise.
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(head) [!MODE_*]: Write fields of interest as arrays.
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(MAGIC_USTAR): Removed.
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(read_number) [MODE_NEWC]: Change to hex.
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(read_number) [!MODE_*]: Parse binary arrays.
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(grub_cpio_find_file): Factor out the code for better structure and
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always use read_number.
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(grub_cpio_mount): Use MAGIC and MAGIC2.
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(grub_cpio_dir): Exit on first hook non-0 return.
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(grub_cpio_fs) [MODE_ODC]: Set name to odc.
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(grub_cpio_fs) [MODE_NEWC]: Set name to newc.
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(GRUB_MOD_INIT) [MODE_ODC]: Set name to odc.
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(GRUB_MOD_INIT) [MODE_NEWC]: Set name to newc.
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(GRUB_MOD_FINI) [MODE_ODC]: Set name to odc.
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(GRUB_MOD_FINI) [MODE_NEWC]: Set name to newc.
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* grub-core/fs/newc.c: New file.
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* grub-core/fs/odc.c: Likewise.
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* grub-core/fs/cpio_be.c: Likewise.
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2011-12-23 Vladimir Serbinenko <phcoder@gmail.com>
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Fix handling of tar numbers occupying the whole field.
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@ -59,6 +59,9 @@ library = {
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common = grub-core/fs/bfs.c;
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common = grub-core/fs/btrfs.c;
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common = grub-core/fs/cpio.c;
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common = grub-core/fs/cpio_be.c;
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common = grub-core/fs/odc.c;
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common = grub-core/fs/newc.c;
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common = grub-core/fs/ext2.c;
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common = grub-core/fs/fat.c;
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common = grub-core/fs/exfat.c;
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@ -1014,6 +1014,21 @@ module = {
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common = fs/cpio.c;
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};
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module = {
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name = cpio_be;
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common = fs/cpio_be.c;
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};
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module = {
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name = newc;
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common = fs/newc.c;
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};
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module = {
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name = odc;
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common = fs/odc.c;
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};
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module = {
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name = ext2;
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common = fs/ext2.c;
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@ -30,28 +30,69 @@ GRUB_MOD_LICENSE ("GPLv3+");
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#define ATTR_DIR 0040000
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#define ATTR_LNK 0120000
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#ifndef MODE_USTAR
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/* cpio support */
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#define MAGIC_BCPIO 070707
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#ifdef MODE_ODC
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#define ALIGN_CPIO(x) x
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#define MAGIC "070707"
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struct head
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{
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grub_uint16_t magic;
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char magic[6];
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char dev[6];
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char ino[6];
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char mode[6];
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char uid[6];
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char gid[6];
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char nlink[6];
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char rdev[6];
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char mtime[11];
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char namesize[6];
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char filesize[11];
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} __attribute__ ((packed));
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#elif defined (MODE_NEWC)
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#define ALIGN_CPIO(x) (ALIGN_UP ((x), 4))
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#define MAGIC "070701"
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#define MAGIC2 "070702"
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struct head
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{
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char magic[6];
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char ino[8];
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char mode[8];
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char uid[8];
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char gid[8];
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char nlink[8];
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char mtime[8];
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char filesize[8];
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char devmajor[8];
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char devminor[8];
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char rdevmajor[8];
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char rdevminor[8];
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char namesize[8];
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char check[8];
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} __attribute__ ((packed));
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#elif !defined (MODE_USTAR)
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/* cpio support */
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#define ALIGN_CPIO(x) (ALIGN_UP ((x), 2))
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#ifdef MODE_BIGENDIAN
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#define MAGIC "\x71\xc7"
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#else
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#define MAGIC "\xc7\x71"
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#endif
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struct head
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{
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grub_uint16_t magic[1];
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grub_uint16_t dev;
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grub_uint16_t ino;
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grub_uint16_t mode;
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grub_uint16_t mode[1];
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grub_uint16_t uid;
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grub_uint16_t gid;
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grub_uint16_t nlink;
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grub_uint16_t rdev;
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grub_uint16_t mtime_1;
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grub_uint16_t mtime_2;
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grub_uint16_t namesize;
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grub_uint16_t filesize_1;
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grub_uint16_t filesize_2;
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grub_uint16_t mtime[2];
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grub_uint16_t namesize[1];
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grub_uint16_t filesize[2];
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} __attribute__ ((packed));
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#else
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/* tar support */
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#define MAGIC_USTAR "ustar"
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#define MAGIC "ustar"
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struct head
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{
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char name[100];
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@ -108,14 +149,48 @@ canonicalize (char *name)
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*optr = 0;
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}
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#if defined (MODE_ODC) || defined (MODE_USTAR)
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static inline unsigned long long
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read_number (const char *str, grub_size_t size)
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{
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long long ret = 0;
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unsigned long long ret = 0;
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while (size-- && *str >= '0' && *str <= '7')
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ret = (ret << 3) | (*str++ & ~'0');
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ret = (ret << 3) | (*str++ & 0xf);
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return ret;
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}
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#elif defined (MODE_NEWC)
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static inline unsigned long long
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read_number (const char *str, grub_size_t size)
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{
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unsigned long long ret = 0;
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while (size-- && grub_isxdigit (*str))
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{
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char dig = *str++;
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if (dig >= '0' && dig <= '9')
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dig &= 0xf;
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else if (dig >= 'a' && dig <= 'f')
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dig -= 'a' - 10;
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else
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dig -= 'A' - 10;
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ret = (ret << 4) | (dig);
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}
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return ret;
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}
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#else
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static inline unsigned long long
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read_number (const grub_uint16_t *arr, grub_size_t size)
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{
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long long ret = 0;
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#ifdef MODE_BIGENDIAN
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while (size--)
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ret = (ret << 16) | grub_be_to_cpu16 (*arr++);
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#else
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while (size--)
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ret = (ret << 16) | grub_le_to_cpu16 (*arr++);
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#endif
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return ret;
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}
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#endif
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static grub_err_t
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grub_cpio_find_file (struct grub_cpio_data *data, char **name,
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@ -124,35 +199,40 @@ grub_cpio_find_file (struct grub_cpio_data *data, char **name,
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{
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#ifndef MODE_USTAR
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struct head hd;
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grub_size_t namesize;
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grub_uint32_t modeval;
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if (grub_disk_read (data->disk, 0, data->hofs, sizeof (hd), &hd))
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return grub_errno;
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if (hd.magic != MAGIC_BCPIO)
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if (grub_memcmp (hd.magic, MAGIC, sizeof (hd.magic)) != 0
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#ifdef MAGIC2
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&& grub_memcmp (hd.magic, MAGIC2, sizeof (hd.magic)) != 0
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#endif
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)
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return grub_error (GRUB_ERR_BAD_FS, "invalid cpio archive");
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data->size = (((grub_uint32_t) hd.filesize_1) << 16) + hd.filesize_2;
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data->size = read_number (hd.filesize, ARRAY_SIZE (hd.filesize));
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if (mtime)
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*mtime = (((grub_uint32_t) hd.mtime_1) << 16) + hd.mtime_2;
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*mtime = read_number (hd.mtime, ARRAY_SIZE (hd.mtime));
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modeval = read_number (hd.mode, ARRAY_SIZE (hd.mode));
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namesize = read_number (hd.namesize, ARRAY_SIZE (hd.namesize));
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if (mode)
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*mode = hd.mode;
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*mode = modeval;
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if (hd.namesize & 1)
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hd.namesize++;
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*name = grub_malloc (hd.namesize + 1);
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*name = grub_malloc (namesize + 1);
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if (*name == NULL)
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return grub_errno;
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if (grub_disk_read (data->disk, 0, data->hofs + sizeof (hd),
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hd.namesize, *name))
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namesize, *name))
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{
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grub_free (*name);
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return grub_errno;
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}
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(*name)[hd.namesize] = 0;
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(*name)[namesize] = 0;
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if (data->size == 0 && hd.mode == 0 && hd.namesize == 11 + 1
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if (data->size == 0 && modeval == 0 && namesize == 11
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&& grub_memcmp(*name, "TRAILER!!!", 11) == 0)
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{
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*ofs = 0;
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canonicalize (*name);
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data->dofs = data->hofs + sizeof (hd) + hd.namesize;
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*ofs = data->dofs + data->size;
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if (data->size & 1)
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(*ofs)++;
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data->dofs = data->hofs + ALIGN_CPIO (sizeof (hd) + namesize);
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*ofs = data->dofs + ALIGN_CPIO (data->size);
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#else
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struct head hd;
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int reread = 0, have_longname = 0, have_longlink = 0;
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@ -181,7 +259,7 @@ grub_cpio_find_file (struct grub_cpio_data *data, char **name,
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return GRUB_ERR_NONE;
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}
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if (grub_memcmp (hd.magic, MAGIC_USTAR, sizeof (MAGIC_USTAR) - 1))
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if (grub_memcmp (hd.magic, MAGIC, sizeof (MAGIC) - 1))
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return grub_error (GRUB_ERR_BAD_FS, "invalid tar archive");
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if (hd.typeflag == 'L')
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@ -293,12 +371,11 @@ grub_cpio_mount (grub_disk_t disk)
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if (grub_disk_read (disk, 0, 0, sizeof (hd), &hd))
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goto fail;
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#ifndef MODE_USTAR
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if (hd.magic != MAGIC_BCPIO)
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#else
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if (grub_memcmp (hd.magic, MAGIC_USTAR,
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sizeof (MAGIC_USTAR) - 1))
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if (grub_memcmp (hd.magic, MAGIC, sizeof (MAGIC) - 1)
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#ifdef MAGIC2
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&& grub_memcmp (hd.magic, MAGIC2, sizeof (MAGIC2) - 1)
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#endif
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)
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goto fail;
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data = (struct grub_cpio_data *) grub_zalloc (sizeof (*data));
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@ -469,7 +546,8 @@ grub_cpio_dir (grub_device_t device, const char *path_in,
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info.mtime = mtime;
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info.mtimeset = 1;
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hook (n, &info);
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if (hook (n, &info))
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goto fail;
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grub_free (prev);
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prev = name;
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}
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@ -623,6 +701,10 @@ grub_cpio_close (grub_file_t file)
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static struct grub_fs grub_cpio_fs = {
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#ifdef MODE_USTAR
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.name = "tarfs",
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#elif defined (MODE_ODC)
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.name = "odc",
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#elif defined (MODE_NEWC)
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.name = "newc",
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#else
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.name = "cpiofs",
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#endif
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@ -637,6 +719,10 @@ static struct grub_fs grub_cpio_fs = {
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#ifdef MODE_USTAR
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GRUB_MOD_INIT (tar)
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#elif defined (MODE_ODC)
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GRUB_MOD_INIT (odc)
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#elif defined (MODE_NEWC)
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GRUB_MOD_INIT (newc)
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#else
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GRUB_MOD_INIT (cpio)
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#endif
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@ -647,6 +733,10 @@ GRUB_MOD_INIT (cpio)
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#ifdef MODE_USTAR
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GRUB_MOD_FINI (tar)
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#elif defined (MODE_ODC)
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GRUB_MOD_FINI (odc)
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#elif defined (MODE_NEWC)
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GRUB_MOD_FINI (newc)
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#else
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GRUB_MOD_FINI (cpio)
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#endif
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2
grub-core/fs/cpio_be.c
Normal file
2
grub-core/fs/cpio_be.c
Normal file
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@ -0,0 +1,2 @@
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#define MODE_BIGENDIAN 1
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#include "cpio.c"
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2
grub-core/fs/newc.c
Normal file
2
grub-core/fs/newc.c
Normal file
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@ -0,0 +1,2 @@
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#define MODE_NEWC 1
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#include "cpio.c"
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2
grub-core/fs/odc.c
Normal file
2
grub-core/fs/odc.c
Normal file
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@ -0,0 +1,2 @@
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#define MODE_ODC 1
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#include "cpio.c"
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