2N/A

2N/A#include <grub/err.h>

2N/A#include <grub/file.h>

2N/A#include <grub/mm.h>

2N/A#include <grub/misc.h>

2N/A#include <grub/disk.h>

2N/A#include <grub/dl.h>

2N/A#include <grub/types.h>

2N/A#include <grub/fshelp.h>

2N/A

2N/AGRUB_MOD_LICENSE ("GPLv3+");

2N/A

2N/A#define XFS_INODE_EXTENTS 9

2N/A

2N/A#define XFS_INODE_FORMAT_INO 1

2N/A#define XFS_INODE_FORMAT_EXT 2

2N/A#define XFS_INODE_FORMAT_BTREE 3

2N/A

2N/A

2N/Astruct grub_xfs_sblock

2N/A{

2N/A grub_uint8_t magic[4];

2N/A grub_uint32_t bsize;

2N/A grub_uint8_t unused1[24];

2N/A grub_uint16_t uuid[8];

2N/A grub_uint8_t unused2[8];

2N/A grub_uint64_t rootino;

2N/A grub_uint8_t unused3[20];

2N/A grub_uint32_t agsize;

2N/A grub_uint8_t unused4[20];

2N/A grub_uint8_t label[12];

2N/A grub_uint8_t log2_bsize;

2N/A grub_uint8_t log2_sect;

2N/A grub_uint8_t log2_inode;

2N/A grub_uint8_t log2_inop;

2N/A grub_uint8_t log2_agblk;

2N/A grub_uint8_t unused6[67];

2N/A grub_uint8_t log2_dirblk;

2N/A} __attribute__ ((packed));

2N/A

2N/Astruct grub_xfs_dir_header

2N/A{

2N/A grub_uint8_t count;

2N/A grub_uint8_t smallino;

2N/A union

2N/A {

2N/A grub_uint32_t i4;

2N/A grub_uint64_t i8;

2N/A } parent __attribute__ ((packed));

2N/A} __attribute__ ((packed));

2N/A

2N/Astruct grub_xfs_dir_entry

2N/A{

2N/A grub_uint8_t len;

2N/A grub_uint16_t offset;

2N/A char name[1];

2N/A /* Inode number follows, 32 bits. */

2N/A} __attribute__ ((packed));

2N/A

2N/Astruct grub_xfs_dir2_entry

2N/A{

2N/A grub_uint64_t inode;

2N/A grub_uint8_t len;

2N/A} __attribute__ ((packed));

2N/A

2N/Atypedef grub_uint32_t grub_xfs_extent[4];

2N/A

2N/Astruct grub_xfs_btree_node

2N/A{

2N/A grub_uint8_t magic[4];

2N/A grub_uint16_t level;

2N/A grub_uint16_t numrecs;

2N/A grub_uint64_t left;

2N/A grub_uint64_t right;

2N/A grub_uint64_t keys[1];

2N/A} __attribute__ ((packed));

2N/A

2N/Astruct grub_xfs_btree_root

2N/A{

2N/A grub_uint16_t level;

2N/A grub_uint16_t numrecs;

2N/A grub_uint64_t keys[1];

2N/A} __attribute__ ((packed));

2N/A

2N/Astruct grub_xfs_time

2N/A{

2N/A grub_uint32_t sec;

2N/A grub_uint32_t nanosec;

2N/A} __attribute__ ((packed));

2N/A

2N/Astruct grub_xfs_inode

2N/A{

2N/A grub_uint8_t magic[2];

2N/A grub_uint16_t mode;

2N/A grub_uint8_t version;

2N/A grub_uint8_t format;

2N/A grub_uint8_t unused2[26];

2N/A struct grub_xfs_time atime;

2N/A struct grub_xfs_time mtime;

2N/A struct grub_xfs_time ctime;

2N/A grub_uint64_t size;

2N/A grub_uint64_t nblocks;

2N/A grub_uint32_t extsize;

2N/A grub_uint32_t nextents;

2N/A grub_uint16_t unused3;

2N/A grub_uint8_t fork_offset;

2N/A grub_uint8_t unused4[17];

2N/A union

2N/A {

2N/A char raw[156];

2N/A struct dir

2N/A {

2N/A struct grub_xfs_dir_header dirhead;

2N/A struct grub_xfs_dir_entry direntry[1];

2N/A } dir;

2N/A grub_xfs_extent extents[XFS_INODE_EXTENTS];

2N/A struct grub_xfs_btree_root btree;

2N/A } data __attribute__ ((packed));

2N/A} __attribute__ ((packed));

2N/A

2N/Astruct grub_xfs_dirblock_tail

2N/A{

2N/A grub_uint32_t leaf_count;

2N/A grub_uint32_t leaf_stale;

2N/A} __attribute__ ((packed));

2N/A

2N/Astruct grub_fshelp_node

2N/A{

2N/A struct grub_xfs_data *data;

2N/A grub_uint64_t ino;

2N/A int inode_read;

2N/A struct grub_xfs_inode inode;

2N/A};

2N/A

2N/Astruct grub_xfs_data

2N/A{

2N/A struct grub_xfs_sblock sblock;

2N/A grub_disk_t disk;

2N/A int pos;

2N/A int bsize;

2N/A grub_uint32_t agsize;

2N/A struct grub_fshelp_node diropen;

2N/A};

2N/A

2N/Astatic grub_dl_t my_mod;

2N/A

2N/A

2N/A

2N/A#define FILETYPE_INO_MASK 0170000

2N/A#define FILETYPE_INO_REG 0100000

2N/A#define FILETYPE_INO_DIRECTORY 0040000

2N/A#define FILETYPE_INO_SYMLINK 0120000

2N/A

2N/Astatic inline int

2N/AGRUB_XFS_INO_AGBITS(struct grub_xfs_data *data)

2N/A{

2N/A return ((data)->sblock.log2_agblk + (data)->sblock.log2_inop);

2N/A}

2N/A

2N/Astatic inline grub_uint64_t

2N/AGRUB_XFS_INO_INOINAG (struct grub_xfs_data *data,

2N/A grub_uint64_t ino)

2N/A{

2N/A return (grub_be_to_cpu64 (ino) & ((1LL << GRUB_XFS_INO_AGBITS (data)) - 1));

2N/A}

2N/A

2N/Astatic inline grub_uint64_t

2N/AGRUB_XFS_INO_AG (struct grub_xfs_data *data,

2N/A grub_uint64_t ino)

2N/A{

2N/A return (grub_be_to_cpu64 (ino) >> GRUB_XFS_INO_AGBITS (data));

2N/A}

2N/A

2N/Astatic inline grub_disk_addr_t

2N/AGRUB_XFS_FSB_TO_BLOCK (struct grub_xfs_data *data, grub_disk_addr_t fsb)

2N/A{

2N/A return ((fsb >> data->sblock.log2_agblk) * data->agsize

2N/A + (fsb & ((1LL << data->sblock.log2_agblk) - 1)));

2N/A}

2N/A

2N/Astatic inline grub_uint64_t

2N/AGRUB_XFS_EXTENT_OFFSET (grub_xfs_extent *exts, int ex)

2N/A{

2N/A return ((grub_be_to_cpu32 (exts[ex][0]) & ~(1 << 31)) << 23

2N/A | grub_be_to_cpu32 (exts[ex][1]) >> 9);

2N/A}

2N/A

2N/Astatic inline grub_uint64_t

2N/AGRUB_XFS_EXTENT_BLOCK (grub_xfs_extent *exts, int ex)

2N/A{

2N/A return ((grub_uint64_t) (grub_be_to_cpu32 (exts[ex][1])

2N/A & (0x1ff)) << 43

2N/A | (grub_uint64_t) grub_be_to_cpu32 (exts[ex][2]) << 11

2N/A | grub_be_to_cpu32 (exts[ex][3]) >> 21);

2N/A}

2N/A

2N/Astatic inline grub_uint64_t

2N/AGRUB_XFS_EXTENT_SIZE (grub_xfs_extent *exts, int ex)

2N/A{

2N/A return (grub_be_to_cpu32 (exts[ex][3]) & ((1 << 20) - 1));

2N/A}

2N/A

2N/Astatic inline int

2N/AGRUB_XFS_ROUND_TO_DIRENT (int pos)

2N/A{

2N/A return ((((pos) + 8 - 1) / 8) * 8);

2N/A}

2N/A

2N/Astatic inline int

2N/AGRUB_XFS_NEXT_DIRENT (int pos, int len)

2N/A{

2N/A return (pos) + GRUB_XFS_ROUND_TO_DIRENT (8 + 1 + len + 2);

2N/A}

2N/A

2N/A

2N/Astatic inline grub_uint64_t

2N/Agrub_xfs_inode_block (struct grub_xfs_data *data,

2N/A grub_uint64_t ino)

2N/A{

2N/A long long int inoinag = GRUB_XFS_INO_INOINAG (data, ino);

2N/A long long ag = GRUB_XFS_INO_AG (data, ino);

2N/A long long block;

2N/A

2N/A block = (inoinag >> data->sblock.log2_inop) + ag * data->agsize;

2N/A block <<= (data->sblock.log2_bsize - GRUB_DISK_SECTOR_BITS);

2N/A return block;

2N/A}

2N/A

2N/A

2N/Astatic inline int

2N/Agrub_xfs_inode_offset (struct grub_xfs_data *data,

2N/A grub_uint64_t ino)

2N/A{

2N/A int inoag = GRUB_XFS_INO_INOINAG (data, ino);

2N/A return ((inoag & ((1 << data->sblock.log2_inop) - 1)) <<

2N/A data->sblock.log2_inode);

2N/A}

2N/A

2N/A

2N/Astatic grub_err_t

2N/Agrub_xfs_read_inode (struct grub_xfs_data *data, grub_uint64_t ino,

2N/A struct grub_xfs_inode *inode)

2N/A{

2N/A grub_uint64_t block = grub_xfs_inode_block (data, ino);

2N/A int offset = grub_xfs_inode_offset (data, ino);

2N/A

2N/A /* Read the inode. */

2N/A if (grub_disk_read (data->disk, block, offset,

2N/A 1 << data->sblock.log2_inode, inode))

2N/A return grub_errno;

2N/A

2N/A if (grub_strncmp ((char *) inode->magic, "IN", 2))

2N/A return grub_error (GRUB_ERR_BAD_FS, "not a correct XFS inode");

2N/A

2N/A return 0;

2N/A}

2N/A

2N/A

2N/Astatic grub_disk_addr_t

2N/Agrub_xfs_read_block (grub_fshelp_node_t node, grub_disk_addr_t fileblock)

2N/A{

2N/A struct grub_xfs_btree_node *leaf = 0;

2N/A int ex, nrec;

2N/A grub_xfs_extent *exts;

2N/A grub_uint64_t ret = 0;

2N/A

2N/A if (node->inode.format == XFS_INODE_FORMAT_BTREE)

2N/A {

2N/A grub_uint64_t *keys;

2N/A int recoffset;

2N/A

2N/A leaf = grub_malloc (node->data->bsize);

2N/A if (leaf == 0)

2N/A return 0;

2N/A

2N/A nrec = grub_be_to_cpu16 (node->inode.data.btree.numrecs);

2N/A keys = &node->inode.data.btree.keys[0];

2N/A if (node->inode.fork_offset)

2N/A recoffset = (node->inode.fork_offset

2N/A - ((char *) &node->inode.data.btree.keys - (char *) &node->inode))

2N/A / (2 * sizeof (grub_uint64_t));

2N/A else

2N/A recoffset = ((1 << node->data->sblock.log2_inode)

2N/A - ((char *) &node->inode.data.btree.keys

2N/A - (char *) &node->inode))

2N/A / (2 * sizeof (grub_uint64_t));

2N/A do

2N/A {

2N/A int i;

2N/A

2N/A for (i = 0; i < nrec; i++)

2N/A {

2N/A if (fileblock < grub_be_to_cpu64 (keys[i]))

2N/A break;

2N/A }

2N/A

2N/A /* Sparse block. */

2N/A if (i == 0)

2N/A {

2N/A grub_free (leaf);

2N/A return 0;

2N/A }

2N/A if (grub_disk_read (node->data->disk,

2N/A GRUB_XFS_FSB_TO_BLOCK (node->data, grub_be_to_cpu64 (keys[i - 1 + recoffset])) << (node->data->sblock.log2_bsize - GRUB_DISK_SECTOR_BITS),

2N/A 0, node->data->bsize, leaf))

2N/A return 0;

2N/A

2N/A if (grub_strncmp ((char *) leaf->magic, "BMAP", 4))

2N/A {

2N/A grub_free (leaf);

2N/A grub_error (GRUB_ERR_BAD_FS, "not a correct XFS BMAP node");

2N/A return 0;

2N/A }

2N/A

2N/A nrec = grub_be_to_cpu16 (leaf->numrecs);

2N/A keys = &leaf->keys[0];

2N/A recoffset = ((node->data->bsize - ((char *) &leaf->keys

2N/A - (char *) leaf))

2N/A / (2 * sizeof (grub_uint64_t)));

2N/A }

2N/A while (leaf->level);

2N/A exts = (grub_xfs_extent *) keys;

2N/A }

2N/A else if (node->inode.format == XFS_INODE_FORMAT_EXT)

2N/A {

2N/A nrec = grub_be_to_cpu32 (node->inode.nextents);

2N/A exts = &node->inode.data.extents[0];

2N/A }

2N/A else

2N/A {

2N/A grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,

2N/A "XFS does not support inode format %d yet",

2N/A node->inode.format);

2N/A return 0;

2N/A }

2N/A

2N/A /* Iterate over each extent to figure out which extent has

2N/A for (ex = 0; ex < nrec; ex++)

2N/A {

2N/A grub_uint64_t start = GRUB_XFS_EXTENT_BLOCK (exts, ex);

2N/A grub_uint64_t offset = GRUB_XFS_EXTENT_OFFSET (exts, ex);

2N/A grub_uint64_t size = GRUB_XFS_EXTENT_SIZE (exts, ex);

2N/A

2N/A /* Sparse block. */

2N/A if (fileblock < offset)

2N/A break;

2N/A else if (fileblock < offset + size)

2N/A {

2N/A ret = (fileblock - offset + start);

2N/A break;

2N/A }

2N/A }

2N/A

2N/A grub_free (leaf);

2N/A

2N/A return GRUB_XFS_FSB_TO_BLOCK(node->data, ret);

2N/A}

2N/A

2N/A

2N/Astatic grub_ssize_t

2N/Agrub_xfs_read_file (grub_fshelp_node_t node,

2N/A void NESTED_FUNC_ATTR (*read_hook) (grub_disk_addr_t sector,

2N/A unsigned offset, unsigned length),

2N/A grub_off_t pos, grub_size_t len, char *buf)

2N/A{

2N/A return grub_fshelp_read_file (node->data->disk, node, read_hook,

2N/A pos, len, buf, grub_xfs_read_block,

2N/A grub_be_to_cpu64 (node->inode.size),

2N/A node->data->sblock.log2_bsize

2N/A - GRUB_DISK_SECTOR_BITS);

2N/A}

2N/A

2N/A

2N/Astatic char *

2N/Agrub_xfs_read_symlink (grub_fshelp_node_t node)

2N/A{

2N/A int size = grub_be_to_cpu64 (node->inode.size);

2N/A

2N/A switch (node->inode.format)

2N/A {

2N/A case XFS_INODE_FORMAT_INO:

2N/A return grub_strndup (node->inode.data.raw, size);

2N/A

2N/A case XFS_INODE_FORMAT_EXT:

2N/A {

2N/A char *symlink;

2N/A grub_ssize_t numread;

2N/A

2N/A symlink = grub_malloc (size + 1);

2N/A if (!symlink)

2N/A return 0;

2N/A

2N/A numread = grub_xfs_read_file (node, 0, 0, size, symlink);

2N/A if (numread != size)

2N/A {

2N/A grub_free (symlink);

2N/A return 0;

2N/A }

2N/A symlink[size] = '\0';

2N/A return symlink;

2N/A }

2N/A }

2N/A

2N/A return 0;

2N/A}

2N/A

2N/A

2N/Astatic enum grub_fshelp_filetype

2N/Agrub_xfs_mode_to_filetype (grub_uint16_t mode)

2N/A{

2N/A if ((grub_be_to_cpu16 (mode)

2N/A & FILETYPE_INO_MASK) == FILETYPE_INO_DIRECTORY)

2N/A return GRUB_FSHELP_DIR;

2N/A else if ((grub_be_to_cpu16 (mode)

2N/A & FILETYPE_INO_MASK) == FILETYPE_INO_SYMLINK)

2N/A return GRUB_FSHELP_SYMLINK;

2N/A else if ((grub_be_to_cpu16 (mode)

2N/A & FILETYPE_INO_MASK) == FILETYPE_INO_REG)

2N/A return GRUB_FSHELP_REG;

2N/A return GRUB_FSHELP_UNKNOWN;

2N/A}

2N/A

2N/A

2N/Astatic int

2N/Agrub_xfs_iterate_dir (grub_fshelp_node_t dir,

2N/A int NESTED_FUNC_ATTR

2N/A (*hook) (const char *filename,

2N/A enum grub_fshelp_filetype filetype,

2N/A grub_fshelp_node_t node))

2N/A{

2N/A struct grub_fshelp_node *diro = (struct grub_fshelp_node *) dir;

2N/A auto int NESTED_FUNC_ATTR call_hook (grub_uint64_t ino, const char *filename);

2N/A

2N/A int NESTED_FUNC_ATTR call_hook (grub_uint64_t ino, const char *filename)

2N/A {

2N/A struct grub_fshelp_node *fdiro;

2N/A

2N/A fdiro = grub_malloc (sizeof (struct grub_fshelp_node)

2N/A - sizeof (struct grub_xfs_inode)

2N/A + (1 << diro->data->sblock.log2_inode));

2N/A if (!fdiro)

2N/A return 0;

2N/A

2N/A /* The inode should be read, otherwise the filetype can

2N/A fdiro->ino = ino;

2N/A fdiro->inode_read = 1;

2N/A fdiro->data = diro->data;

2N/A grub_xfs_read_inode (diro->data, ino, &fdiro->inode);

2N/A

2N/A return hook (filename,

2N/A grub_xfs_mode_to_filetype (fdiro->inode.mode),

2N/A fdiro);

2N/A }

2N/A

2N/A switch (diro->inode.format)

2N/A {

2N/A case XFS_INODE_FORMAT_INO:

2N/A {

2N/A struct grub_xfs_dir_entry *de = &diro->inode.data.dir.direntry[0];

2N/A int smallino = !diro->inode.data.dir.dirhead.smallino;

2N/A int i;

2N/A grub_uint64_t parent;

2N/A

2N/A /* If small inode numbers are used to pack the direntry, the

2N/A if (smallino)

2N/A {

2N/A parent = grub_be_to_cpu32 (diro->inode.data.dir.dirhead.parent.i4);

2N/A parent = grub_cpu_to_be64 (parent);

2N/A /* The header is a bit smaller than usual. */

2N/A de = (struct grub_xfs_dir_entry *) ((char *) de - 4);

2N/A }

2N/A else

2N/A {

2N/A parent = diro->inode.data.dir.dirhead.parent.i8;

2N/A }

2N/A

2N/A /* Synthesize the direntries for `.' and `..'. */

2N/A if (call_hook (diro->ino, "."))

2N/A return 1;

2N/A

2N/A if (call_hook (parent, ".."))

2N/A return 1;

2N/A

2N/A for (i = 0; i < diro->inode.data.dir.dirhead.count; i++)

2N/A {

2N/A grub_uint64_t ino;

2N/A grub_uint8_t *inopos = (((grub_uint8_t *) de)

2N/A + sizeof (struct grub_xfs_dir_entry)

2N/A + de->len - 1);

2N/A char name[de->len + 1];

2N/A

2N/A /* inopos might be unaligned. */

2N/A if (smallino)

2N/A ino = (((grub_uint32_t) inopos[0]) << 24)

2N/A | (((grub_uint32_t) inopos[1]) << 16)

2N/A | (((grub_uint32_t) inopos[2]) << 8)

2N/A | (((grub_uint32_t) inopos[3]) << 0);

2N/A else

2N/A ino = (((grub_uint64_t) inopos[0]) << 56)

2N/A | (((grub_uint64_t) inopos[1]) << 48)

2N/A | (((grub_uint64_t) inopos[2]) << 40)

2N/A | (((grub_uint64_t) inopos[3]) << 32)

2N/A | (((grub_uint64_t) inopos[4]) << 24)

2N/A | (((grub_uint64_t) inopos[5]) << 16)

2N/A | (((grub_uint64_t) inopos[6]) << 8)

2N/A | (((grub_uint64_t) inopos[7]) << 0);

2N/A ino = grub_cpu_to_be64 (ino);

2N/A

2N/A grub_memcpy (name, de->name, de->len);

2N/A name[de->len] = '\0';

2N/A if (call_hook (ino, name))

2N/A return 1;

2N/A

2N/A de = ((struct grub_xfs_dir_entry *)

2N/A (((char *) de)+ sizeof (struct grub_xfs_dir_entry) + de->len

2N/A + ((smallino ? sizeof (grub_uint32_t)

2N/A : sizeof (grub_uint64_t))) - 1));

2N/A }

2N/A break;

2N/A }

2N/A

2N/A case XFS_INODE_FORMAT_BTREE:

2N/A case XFS_INODE_FORMAT_EXT:

2N/A {

2N/A grub_ssize_t numread;

2N/A char *dirblock;

2N/A grub_uint64_t blk;

2N/A int dirblk_size, dirblk_log2;

2N/A

2N/A dirblk_log2 = (dir->data->sblock.log2_bsize

2N/A + dir->data->sblock.log2_dirblk);

2N/A dirblk_size = 1 << dirblk_log2;

2N/A

2N/A dirblock = grub_malloc (dirblk_size);

2N/A if (! dirblock)

2N/A return 0;

2N/A

2N/A /* Iterate over every block the directory has. */

2N/A for (blk = 0;

2N/A blk < (grub_be_to_cpu64 (dir->inode.size)

2N/A >> dirblk_log2);

2N/A blk++)

2N/A {

2N/A /* The header is skipped, the first direntry is stored

2N/A int pos = 16;

2N/A int entries;

2N/A int tail_start = (dirblk_size

2N/A - sizeof (struct grub_xfs_dirblock_tail));

2N/A

2N/A struct grub_xfs_dirblock_tail *tail;

2N/A tail = (struct grub_xfs_dirblock_tail *) &dirblock[tail_start];

2N/A

2N/A numread = grub_xfs_read_file (dir, 0,

2N/A blk << dirblk_log2,

2N/A dirblk_size, dirblock);

2N/A if (numread != dirblk_size)

2N/A return 0;

2N/A

2N/A entries = (grub_be_to_cpu32 (tail->leaf_count)

2N/A - grub_be_to_cpu32 (tail->leaf_stale));

2N/A

2N/A /* Iterate over all entries within this block. */

2N/A while (pos < (dirblk_size

2N/A - (int) sizeof (struct grub_xfs_dir2_entry)))

2N/A {

2N/A struct grub_xfs_dir2_entry *direntry;

2N/A grub_uint8_t *freetag;

2N/A char *filename;

2N/A

2N/A direntry = (struct grub_xfs_dir2_entry *) &dirblock[pos];

2N/A freetag = (grub_uint8_t *) direntry;

2N/A

2N/A if (grub_get_unaligned16 (freetag) == 0XFFFF)

2N/A {

2N/A grub_uint8_t *skip = (freetag + sizeof (grub_uint16_t));

2N/A

2N/A /* This entry is not used, go to the next one. */

2N/A pos += grub_be_to_cpu16 (grub_get_unaligned16 (skip));

2N/A

2N/A continue;

2N/A }

2N/A

2N/A filename = &dirblock[pos + sizeof (*direntry)];

2N/A /* The byte after the filename is for the tag, which

2N/A filename[direntry->len] = '\0';

2N/A

2N/A if (call_hook (direntry->inode, filename))

2N/A {

2N/A grub_free (dirblock);

2N/A return 1;

2N/A }

2N/A

2N/A /* Check if last direntry in this block is

2N/A entries--;

2N/A if (!entries)

2N/A break;

2N/A

2N/A /* Select the next directory entry. */

2N/A pos = GRUB_XFS_NEXT_DIRENT (pos, direntry->len);

2N/A pos = GRUB_XFS_ROUND_TO_DIRENT (pos);

2N/A }

2N/A }

2N/A grub_free (dirblock);

2N/A break;

2N/A }

2N/A

2N/A default:

2N/A grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,

2N/A "XFS does not support inode format %d yet",

2N/A diro->inode.format);

2N/A }

2N/A return 0;

2N/A}

2N/A

2N/A

2N/Astatic struct grub_xfs_data *

2N/Agrub_xfs_mount (grub_disk_t disk)

2N/A{

2N/A struct grub_xfs_data *data = 0;

2N/A

2N/A data = grub_zalloc (sizeof (struct grub_xfs_data));

2N/A if (!data)

2N/A return 0;

2N/A

2N/A /* Read the superblock. */

2N/A if (grub_disk_read (disk, 0, 0,

2N/A sizeof (struct grub_xfs_sblock), &data->sblock))

2N/A goto fail;

2N/A

2N/A if (grub_strncmp ((char *) (data->sblock.magic), "XFSB", 4))

2N/A {

2N/A grub_error (GRUB_ERR_BAD_FS, "not a XFS filesystem");

2N/A goto fail;

2N/A }

2N/A

2N/A data = grub_realloc (data,

2N/A sizeof (struct grub_xfs_data)

2N/A - sizeof (struct grub_xfs_inode)

2N/A + (1 << data->sblock.log2_inode));

2N/A

2N/A if (! data)

2N/A goto fail;

2N/A

2N/A data->diropen.data = data;

2N/A data->diropen.ino = data->sblock.rootino;

2N/A data->diropen.inode_read = 1;

2N/A data->bsize = grub_be_to_cpu32 (data->sblock.bsize);

2N/A data->agsize = grub_be_to_cpu32 (data->sblock.agsize);

2N/A

2N/A data->disk = disk;

2N/A data->pos = 0;

2N/A

2N/A grub_xfs_read_inode (data, data->diropen.ino, &data->diropen.inode);

2N/A

2N/A return data;

2N/A fail:

2N/A

2N/A if (grub_errno == GRUB_ERR_OUT_OF_RANGE)

2N/A grub_error (GRUB_ERR_BAD_FS, "not an XFS filesystem");

2N/A

2N/A grub_free (data);

2N/A

2N/A return 0;

2N/A}

2N/A

2N/A

2N/Astatic grub_err_t

2N/Agrub_xfs_dir (grub_device_t device, const char *path,

2N/A int (*hook) (const char *filename,

2N/A const struct grub_dirhook_info *info))

2N/A{

2N/A struct grub_xfs_data *data = 0;

2N/A struct grub_fshelp_node *fdiro = 0;

2N/A

2N/A auto int NESTED_FUNC_ATTR iterate (const char *filename,

2N/A enum grub_fshelp_filetype filetype,

2N/A grub_fshelp_node_t node);

2N/A

2N/A int NESTED_FUNC_ATTR iterate (const char *filename,

2N/A enum grub_fshelp_filetype filetype,

2N/A grub_fshelp_node_t node)

2N/A {

2N/A struct grub_dirhook_info info;

2N/A grub_memset (&info, 0, sizeof (info));

2N/A if (node->inode_read)

2N/A {

2N/A info.mtimeset = 1;

2N/A info.mtime = grub_be_to_cpu32 (node->inode.mtime.sec);

2N/A }

2N/A info.dir = ((filetype & GRUB_FSHELP_TYPE_MASK) == GRUB_FSHELP_DIR);

2N/A grub_free (node);

2N/A return hook (filename, &info);

2N/A }

2N/A

2N/A grub_dl_ref (my_mod);

2N/A

2N/A data = grub_xfs_mount (device->disk);

2N/A if (!data)

2N/A goto mount_fail;

2N/A

2N/A grub_fshelp_find_file (path, &data->diropen, &fdiro, grub_xfs_iterate_dir,

2N/A grub_xfs_read_symlink, GRUB_FSHELP_DIR);

2N/A if (grub_errno)

2N/A goto fail;

2N/A

2N/A grub_xfs_iterate_dir (fdiro, iterate);

2N/A

2N/A fail:

2N/A if (fdiro != &data->diropen)

2N/A grub_free (fdiro);

2N/A grub_free (data);

2N/A

2N/A mount_fail:

2N/A

2N/A grub_dl_unref (my_mod);

2N/A

2N/A return grub_errno;

2N/A}

2N/A

2N/A

2N/Astatic grub_err_t

2N/Agrub_xfs_open (struct grub_file *file, const char *name)

2N/A{

2N/A struct grub_xfs_data *data;

2N/A struct grub_fshelp_node *fdiro = 0;

2N/A

2N/A grub_dl_ref (my_mod);

2N/A

2N/A data = grub_xfs_mount (file->device->disk);

2N/A if (!data)

2N/A goto mount_fail;

2N/A

2N/A grub_fshelp_find_file (name, &data->diropen, &fdiro, grub_xfs_iterate_dir,

2N/A grub_xfs_read_symlink, GRUB_FSHELP_REG);

2N/A if (grub_errno)

2N/A goto fail;

2N/A

2N/A if (!fdiro->inode_read)

2N/A {

2N/A grub_xfs_read_inode (data, fdiro->ino, &fdiro->inode);

2N/A if (grub_errno)

2N/A goto fail;

2N/A }

2N/A

2N/A if (fdiro != &data->diropen)

2N/A {

2N/A grub_memcpy (&data->diropen, fdiro,

2N/A sizeof (struct grub_fshelp_node)

2N/A - sizeof (struct grub_xfs_inode)

2N/A + (1 << data->sblock.log2_inode));

2N/A grub_free (fdiro);

2N/A }

2N/A

2N/A file->size = grub_be_to_cpu64 (data->diropen.inode.size);

2N/A file->data = data;

2N/A file->offset = 0;

2N/A

2N/A return 0;

2N/A

2N/A fail:

2N/A if (fdiro != &data->diropen)

2N/A grub_free (fdiro);

2N/A grub_free (data);

2N/A

2N/A mount_fail:

2N/A grub_dl_unref (my_mod);

2N/A

2N/A return grub_errno;

2N/A}

2N/A

2N/A

2N/Astatic grub_ssize_t

2N/Agrub_xfs_read (grub_file_t file, char *buf, grub_size_t len)

2N/A{

2N/A struct grub_xfs_data *data =

2N/A (struct grub_xfs_data *) file->data;

2N/A

2N/A return grub_xfs_read_file (&data->diropen, file->read_hook,

2N/A file->offset, len, buf);

2N/A}

2N/A

2N/A

2N/Astatic grub_err_t

2N/Agrub_xfs_close (grub_file_t file)

2N/A{

2N/A grub_free (file->data);

2N/A

2N/A grub_dl_unref (my_mod);

2N/A

2N/A return GRUB_ERR_NONE;

2N/A}

2N/A

2N/A

2N/Astatic grub_err_t

2N/Agrub_xfs_label (grub_device_t device, char **label)

2N/A{

2N/A struct grub_xfs_data *data;

2N/A grub_disk_t disk = device->disk;

2N/A

2N/A grub_dl_ref (my_mod);

2N/A

2N/A data = grub_xfs_mount (disk);

2N/A if (data)

2N/A *label = grub_strndup ((char *) (data->sblock.label), 12);

2N/A else

2N/A *label = 0;

2N/A

2N/A grub_dl_unref (my_mod);

2N/A

2N/A grub_free (data);

2N/A

2N/A return grub_errno;

2N/A}

2N/A

2N/Astatic grub_err_t

2N/Agrub_xfs_uuid (grub_device_t device, char **uuid)

2N/A{

2N/A struct grub_xfs_data *data;

2N/A grub_disk_t disk = device->disk;

2N/A

2N/A grub_dl_ref (my_mod);

2N/A

2N/A data = grub_xfs_mount (disk);

2N/A if (data)

2N/A {

2N/A *uuid = grub_xasprintf ("%04x%04x-%04x-%04x-%04x-%04x%04x%04x",

2N/A grub_be_to_cpu16 (data->sblock.uuid[0]),

2N/A grub_be_to_cpu16 (data->sblock.uuid[1]),

2N/A grub_be_to_cpu16 (data->sblock.uuid[2]),

2N/A grub_be_to_cpu16 (data->sblock.uuid[3]),

2N/A grub_be_to_cpu16 (data->sblock.uuid[4]),

2N/A grub_be_to_cpu16 (data->sblock.uuid[5]),

2N/A grub_be_to_cpu16 (data->sblock.uuid[6]),

2N/A grub_be_to_cpu16 (data->sblock.uuid[7]));

2N/A }

2N/A else

2N/A *uuid = NULL;

2N/A

2N/A grub_dl_unref (my_mod);

2N/A

2N/A grub_free (data);

2N/A

2N/A return grub_errno;

2N/A}

2N/A

2N/A

2N/A

2N/Astatic struct grub_fs grub_xfs_fs =

2N/A {

2N/A .name = "xfs",

2N/A .dir = grub_xfs_dir,

2N/A .open = grub_xfs_open,

2N/A .read = grub_xfs_read,

2N/A .close = grub_xfs_close,

2N/A .label = grub_xfs_label,

2N/A .uuid = grub_xfs_uuid,

2N/A#ifdef GRUB_UTIL

2N/A .reserved_first_sector = 0,

2N/A#endif

2N/A .next = 0

2N/A };

2N/A

2N/AGRUB_MOD_INIT(xfs)

2N/A{

2N/A grub_fs_register (&grub_xfs_fs);

2N/A my_mod = mod;

2N/A}

2N/A

2N/AGRUB_MOD_FINI(xfs)

2N/A{

2N/A grub_fs_unregister (&grub_xfs_fs);

2N/A}