d4c9b428e1
* fs/xfs.c (struct grub_xfs_dir_header): Use names similar to those in Linux XFS code. Provide a way to access 64-bit parent inode. (grub_xfs_iterate_dir): Use the new names. Avoid reading past the end of struct grub_xfs_dir_header.
833 lines
20 KiB
C
833 lines
20 KiB
C
/* xfs.c - XFS. */
|
||
/*
|
||
* GRUB -- GRand Unified Bootloader
|
||
* Copyright (C) 2005,2006,2007,2008 Free Software Foundation, Inc.
|
||
*
|
||
* GRUB is free software: you can redistribute it and/or modify
|
||
* it under the terms of the GNU General Public License as published by
|
||
* the Free Software Foundation, either version 3 of the License, or
|
||
* (at your option) any later version.
|
||
*
|
||
* GRUB is distributed in the hope that it will be useful,
|
||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
* GNU General Public License for more details.
|
||
*
|
||
* You should have received a copy of the GNU General Public License
|
||
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
|
||
*/
|
||
|
||
#include <grub/err.h>
|
||
#include <grub/file.h>
|
||
#include <grub/mm.h>
|
||
#include <grub/misc.h>
|
||
#include <grub/disk.h>
|
||
#include <grub/dl.h>
|
||
#include <grub/types.h>
|
||
#include <grub/fshelp.h>
|
||
|
||
#define XFS_INODE_EXTENTS 9
|
||
|
||
#define XFS_INODE_FORMAT_INO 1
|
||
#define XFS_INODE_FORMAT_EXT 2
|
||
#define XFS_INODE_FORMAT_BTREE 3
|
||
|
||
|
||
struct grub_xfs_sblock
|
||
{
|
||
grub_uint8_t magic[4];
|
||
grub_uint32_t bsize;
|
||
grub_uint8_t unused1[24];
|
||
grub_uint16_t uuid[8];
|
||
grub_uint8_t unused2[8];
|
||
grub_uint64_t rootino;
|
||
grub_uint8_t unused3[20];
|
||
grub_uint32_t agsize;
|
||
grub_uint8_t unused4[20];
|
||
grub_uint8_t label[12];
|
||
grub_uint8_t log2_bsize;
|
||
grub_uint8_t unused5[2];
|
||
grub_uint8_t log2_inop;
|
||
grub_uint8_t log2_agblk;
|
||
grub_uint8_t unused6[67];
|
||
grub_uint8_t log2_dirblk;
|
||
} __attribute__ ((packed));
|
||
|
||
struct grub_xfs_dir_header
|
||
{
|
||
grub_uint8_t count;
|
||
grub_uint8_t i8count;
|
||
union
|
||
{
|
||
grub_uint32_t i4;
|
||
grub_uint64_t i8;
|
||
} parent __attribute__ ((packed));
|
||
} __attribute__ ((packed));
|
||
|
||
struct grub_xfs_dir_entry
|
||
{
|
||
grub_uint8_t len;
|
||
grub_uint16_t offset;
|
||
char name[1];
|
||
/* Inode number follows, 32 bits. */
|
||
} __attribute__ ((packed));
|
||
|
||
struct grub_xfs_dir2_entry
|
||
{
|
||
grub_uint64_t inode;
|
||
grub_uint8_t len;
|
||
} __attribute__ ((packed));
|
||
|
||
typedef grub_uint32_t grub_xfs_extent[4];
|
||
|
||
struct grub_xfs_btree_node
|
||
{
|
||
grub_uint8_t magic[4];
|
||
grub_uint16_t level;
|
||
grub_uint16_t numrecs;
|
||
grub_uint64_t left;
|
||
grub_uint64_t right;
|
||
grub_uint64_t keys[1];
|
||
} __attribute__ ((packed));
|
||
|
||
struct grub_xfs_btree_root
|
||
{
|
||
grub_uint16_t level;
|
||
grub_uint16_t numrecs;
|
||
grub_uint64_t keys[1];
|
||
} __attribute__ ((packed));
|
||
|
||
struct grub_xfs_inode
|
||
{
|
||
grub_uint8_t magic[2];
|
||
grub_uint16_t mode;
|
||
grub_uint8_t version;
|
||
grub_uint8_t format;
|
||
grub_uint8_t unused2[50];
|
||
grub_uint64_t size;
|
||
grub_uint64_t nblocks;
|
||
grub_uint32_t extsize;
|
||
grub_uint32_t nextents;
|
||
grub_uint8_t unused3[20];
|
||
union
|
||
{
|
||
char raw[156];
|
||
struct dir
|
||
{
|
||
struct grub_xfs_dir_header dirhead;
|
||
struct grub_xfs_dir_entry direntry[1];
|
||
} dir;
|
||
grub_xfs_extent extents[XFS_INODE_EXTENTS];
|
||
struct grub_xfs_btree_root btree;
|
||
} data __attribute__ ((packed));
|
||
} __attribute__ ((packed));
|
||
|
||
struct grub_xfs_dirblock_tail
|
||
{
|
||
grub_uint32_t leaf_count;
|
||
grub_uint32_t leaf_stale;
|
||
} __attribute__ ((packed));
|
||
|
||
struct grub_fshelp_node
|
||
{
|
||
struct grub_xfs_data *data;
|
||
struct grub_xfs_inode inode;
|
||
grub_uint64_t ino;
|
||
int inode_read;
|
||
};
|
||
|
||
struct grub_xfs_data
|
||
{
|
||
struct grub_xfs_sblock sblock;
|
||
struct grub_xfs_inode *inode;
|
||
grub_disk_t disk;
|
||
int pos;
|
||
int bsize;
|
||
int agsize;
|
||
struct grub_fshelp_node diropen;
|
||
|
||
};
|
||
|
||
#ifndef GRUB_UTIL
|
||
static grub_dl_t my_mod;
|
||
#endif
|
||
|
||
|
||
|
||
/* Filetype information as used in inodes. */
|
||
#define FILETYPE_INO_MASK 0170000
|
||
#define FILETYPE_INO_REG 0100000
|
||
#define FILETYPE_INO_DIRECTORY 0040000
|
||
#define FILETYPE_INO_SYMLINK 0120000
|
||
|
||
#define GRUB_XFS_INO_AGBITS(data) \
|
||
((data)->sblock.log2_agblk + (data)->sblock.log2_inop)
|
||
#define GRUB_XFS_INO_INOINAG(data, ino) \
|
||
(grub_be_to_cpu64 (ino) & ((1 << GRUB_XFS_INO_AGBITS (data)) - 1))
|
||
#define GRUB_XFS_INO_AG(data,ino) \
|
||
(grub_be_to_cpu64 (ino) >> GRUB_XFS_INO_AGBITS (data))
|
||
|
||
#define GRUB_XFS_FSB_TO_BLOCK(data, fsb) \
|
||
(((fsb) >> (data)->sblock.log2_agblk) * (data)->agsize \
|
||
+ ((fsb) & ((1 << (data)->sblock.log2_agblk) - 1)))
|
||
|
||
#define GRUB_XFS_EXTENT_OFFSET(exts,ex) \
|
||
((grub_be_to_cpu32 (exts[ex][0]) & ~(1 << 31)) << 23 \
|
||
| grub_be_to_cpu32 (exts[ex][1]) >> 9)
|
||
|
||
#define GRUB_XFS_EXTENT_BLOCK(exts,ex) \
|
||
((grub_uint64_t) (grub_be_to_cpu32 (exts[ex][1]) \
|
||
& (0x1ff)) << 43 \
|
||
| (grub_uint64_t) grub_be_to_cpu32 (exts[ex][2]) << 11 \
|
||
| grub_be_to_cpu32 (exts[ex][3]) >> 21)
|
||
|
||
#define GRUB_XFS_EXTENT_SIZE(exts,ex) \
|
||
(grub_be_to_cpu32 (exts[ex][3]) & ((1 << 20) - 1))
|
||
|
||
#define GRUB_XFS_ROUND_TO_DIRENT(pos) ((((pos) + 8 - 1) / 8) * 8)
|
||
#define GRUB_XFS_NEXT_DIRENT(pos,len) \
|
||
(pos) + GRUB_XFS_ROUND_TO_DIRENT (8 + 1 + len + 2)
|
||
|
||
static inline int
|
||
grub_xfs_inode_block (struct grub_xfs_data *data,
|
||
grub_uint64_t ino)
|
||
{
|
||
long long int inoinag = GRUB_XFS_INO_INOINAG (data, ino);
|
||
long long ag = GRUB_XFS_INO_AG (data, ino);
|
||
long long block;
|
||
|
||
block = (inoinag >> 4) + ag * data->agsize;
|
||
block <<= (data->sblock.log2_bsize - GRUB_DISK_SECTOR_BITS);
|
||
return block;
|
||
}
|
||
|
||
|
||
static inline int
|
||
grub_xfs_inode_offset (struct grub_xfs_data *data,
|
||
grub_uint64_t ino)
|
||
{
|
||
int inoag = GRUB_XFS_INO_INOINAG (data, ino);
|
||
return (inoag & ((1 << 4) - 1)) << 8;
|
||
}
|
||
|
||
|
||
static grub_err_t
|
||
grub_xfs_read_inode (struct grub_xfs_data *data, grub_uint64_t ino,
|
||
struct grub_xfs_inode *inode)
|
||
{
|
||
int block = grub_xfs_inode_block (data, ino);
|
||
int offset = grub_xfs_inode_offset (data, ino);
|
||
|
||
/* Read the inode. */
|
||
if (grub_disk_read (data->disk, block, offset,
|
||
sizeof (struct grub_xfs_inode), (char *) inode))
|
||
return grub_errno;
|
||
|
||
if (grub_strncmp ((char *) inode->magic, "IN", 2))
|
||
return grub_error (GRUB_ERR_BAD_FS, "not a correct XFS inode.\n");
|
||
|
||
return 0;
|
||
}
|
||
|
||
|
||
static grub_disk_addr_t
|
||
grub_xfs_read_block (grub_fshelp_node_t node, grub_disk_addr_t fileblock)
|
||
{
|
||
struct grub_xfs_btree_node *leaf = 0;
|
||
int ex, nrec;
|
||
grub_xfs_extent *exts;
|
||
grub_uint64_t ret = 0;
|
||
|
||
if (node->inode.format == XFS_INODE_FORMAT_BTREE)
|
||
{
|
||
grub_uint64_t *keys;
|
||
|
||
leaf = grub_malloc (node->data->sblock.bsize);
|
||
if (leaf == 0)
|
||
return 0;
|
||
|
||
nrec = grub_be_to_cpu16 (node->inode.data.btree.numrecs);
|
||
keys = &node->inode.data.btree.keys[0];
|
||
do
|
||
{
|
||
int i;
|
||
|
||
for (i = 0; i < nrec; i++)
|
||
{
|
||
if (fileblock < grub_be_to_cpu64 (keys[i]))
|
||
break;
|
||
}
|
||
|
||
/* Sparse block. */
|
||
if (i == 0)
|
||
{
|
||
grub_free (leaf);
|
||
return 0;
|
||
}
|
||
|
||
if (grub_disk_read (node->data->disk,
|
||
grub_be_to_cpu64 (keys[i - 1 + XFS_INODE_EXTENTS])
|
||
<< (node->data->sblock.log2_bsize
|
||
- GRUB_DISK_SECTOR_BITS),
|
||
0, node->data->sblock.bsize, (char *) leaf))
|
||
return 0;
|
||
|
||
if (grub_strncmp ((char *) leaf->magic, "BMAP", 4))
|
||
{
|
||
grub_free (leaf);
|
||
grub_error (GRUB_ERR_BAD_FS, "not a correct XFS BMAP node.\n");
|
||
return 0;
|
||
}
|
||
|
||
nrec = grub_be_to_cpu16 (leaf->numrecs);
|
||
keys = &leaf->keys[0];
|
||
} while (leaf->level);
|
||
exts = (grub_xfs_extent *) keys;
|
||
}
|
||
else if (node->inode.format == XFS_INODE_FORMAT_EXT)
|
||
{
|
||
nrec = grub_be_to_cpu32 (node->inode.nextents);
|
||
exts = &node->inode.data.extents[0];
|
||
}
|
||
else
|
||
{
|
||
grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
|
||
"xfs does not support inode format %d yet",
|
||
node->inode.format);
|
||
return 0;
|
||
}
|
||
|
||
/* Iterate over each extent to figure out which extent has
|
||
the block we are looking for. */
|
||
for (ex = 0; ex < nrec; ex++)
|
||
{
|
||
grub_uint64_t start = GRUB_XFS_EXTENT_BLOCK (exts, ex);
|
||
grub_uint64_t offset = GRUB_XFS_EXTENT_OFFSET (exts, ex);
|
||
grub_uint64_t size = GRUB_XFS_EXTENT_SIZE (exts, ex);
|
||
|
||
/* Sparse block. */
|
||
if (fileblock < offset)
|
||
break;
|
||
else if (fileblock < offset + size)
|
||
{
|
||
ret = (fileblock - offset + start);
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (leaf)
|
||
grub_free (leaf);
|
||
|
||
return GRUB_XFS_FSB_TO_BLOCK(node->data, ret);
|
||
}
|
||
|
||
|
||
/* Read LEN bytes from the file described by DATA starting with byte
|
||
POS. Return the amount of read bytes in READ. */
|
||
static grub_ssize_t
|
||
grub_xfs_read_file (grub_fshelp_node_t node,
|
||
void NESTED_FUNC_ATTR (*read_hook) (grub_disk_addr_t sector,
|
||
unsigned offset, unsigned length),
|
||
int pos, grub_size_t len, char *buf)
|
||
{
|
||
return grub_fshelp_read_file (node->data->disk, node, read_hook,
|
||
pos, len, buf, grub_xfs_read_block,
|
||
grub_be_to_cpu64 (node->inode.size),
|
||
node->data->sblock.log2_bsize
|
||
- GRUB_DISK_SECTOR_BITS);
|
||
}
|
||
|
||
|
||
static char *
|
||
grub_xfs_read_symlink (grub_fshelp_node_t node)
|
||
{
|
||
int size = grub_be_to_cpu64 (node->inode.size);
|
||
|
||
switch (node->inode.format)
|
||
{
|
||
case XFS_INODE_FORMAT_INO:
|
||
return grub_strndup (node->inode.data.raw, size);
|
||
|
||
case XFS_INODE_FORMAT_EXT:
|
||
{
|
||
char *symlink;
|
||
grub_ssize_t numread;
|
||
|
||
symlink = grub_malloc (size + 1);
|
||
if (!symlink)
|
||
return 0;
|
||
|
||
numread = grub_xfs_read_file (node, 0, 0, size, symlink);
|
||
if (numread != size)
|
||
{
|
||
grub_free (symlink);
|
||
return 0;
|
||
}
|
||
symlink[size] = '\0';
|
||
return symlink;
|
||
}
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
|
||
static enum grub_fshelp_filetype
|
||
grub_xfs_mode_to_filetype (grub_uint16_t mode)
|
||
{
|
||
if ((grub_be_to_cpu16 (mode)
|
||
& FILETYPE_INO_MASK) == FILETYPE_INO_DIRECTORY)
|
||
return GRUB_FSHELP_DIR;
|
||
else if ((grub_be_to_cpu16 (mode)
|
||
& FILETYPE_INO_MASK) == FILETYPE_INO_SYMLINK)
|
||
return GRUB_FSHELP_SYMLINK;
|
||
else if ((grub_be_to_cpu16 (mode)
|
||
& FILETYPE_INO_MASK) == FILETYPE_INO_REG)
|
||
return GRUB_FSHELP_REG;
|
||
return GRUB_FSHELP_UNKNOWN;
|
||
}
|
||
|
||
|
||
static int
|
||
grub_xfs_iterate_dir (grub_fshelp_node_t dir,
|
||
int NESTED_FUNC_ATTR
|
||
(*hook) (const char *filename,
|
||
enum grub_fshelp_filetype filetype,
|
||
grub_fshelp_node_t node))
|
||
{
|
||
struct grub_fshelp_node *diro = (struct grub_fshelp_node *) dir;
|
||
auto int NESTED_FUNC_ATTR call_hook (grub_uint64_t ino, char *filename);
|
||
|
||
int NESTED_FUNC_ATTR call_hook (grub_uint64_t ino, char *filename)
|
||
{
|
||
struct grub_fshelp_node *fdiro;
|
||
|
||
fdiro = grub_malloc (sizeof (struct grub_fshelp_node));
|
||
if (!fdiro)
|
||
return 0;
|
||
|
||
/* The inode should be read, otherwise the filetype can
|
||
not be determined. */
|
||
fdiro->ino = ino;
|
||
fdiro->inode_read = 1;
|
||
fdiro->data = diro->data;
|
||
grub_xfs_read_inode (diro->data, ino, &fdiro->inode);
|
||
|
||
return hook (filename,
|
||
grub_xfs_mode_to_filetype (fdiro->inode.mode),
|
||
fdiro);
|
||
}
|
||
|
||
switch (diro->inode.format)
|
||
{
|
||
case XFS_INODE_FORMAT_INO:
|
||
{
|
||
struct grub_xfs_dir_entry *de = &diro->inode.data.dir.direntry[0];
|
||
int smallino = !diro->inode.data.dir.dirhead.i8count;
|
||
int i;
|
||
grub_uint64_t parent;
|
||
|
||
/* If small inode numbers are used to pack the direntry, the
|
||
parent inode number is small too. */
|
||
if (smallino)
|
||
{
|
||
parent = grub_be_to_cpu32 (diro->inode.data.dir.dirhead.parent.i4);
|
||
parent = grub_cpu_to_be64 (parent);
|
||
}
|
||
else
|
||
{
|
||
parent = diro->inode.data.dir.dirhead.parent.i8;
|
||
/* The header is a bit bigger than usual. */
|
||
de = (struct grub_xfs_dir_entry *) ((char *) de + 4);
|
||
}
|
||
|
||
/* Synthesize the direntries for `.' and `..'. */
|
||
if (call_hook (diro->ino, "."))
|
||
return 1;
|
||
|
||
if (call_hook (parent, ".."))
|
||
return 1;
|
||
|
||
for (i = 0; i < diro->inode.data.dir.dirhead.count; i++)
|
||
{
|
||
grub_uint64_t ino;
|
||
void *inopos = (((char *) de)
|
||
+ sizeof (struct grub_xfs_dir_entry)
|
||
+ de->len - 1);
|
||
char name[de->len + 1];
|
||
|
||
if (smallino)
|
||
{
|
||
ino = grub_be_to_cpu32 (*(grub_uint32_t *) inopos);
|
||
ino = grub_cpu_to_be64 (ino);
|
||
}
|
||
else
|
||
ino = *(grub_uint64_t *) inopos;
|
||
|
||
grub_memcpy (name, de->name, de->len);
|
||
name[de->len] = '\0';
|
||
if (call_hook (ino, name))
|
||
return 1;
|
||
|
||
de = ((struct grub_xfs_dir_entry *)
|
||
(((char *) de)+ sizeof (struct grub_xfs_dir_entry) + de->len
|
||
+ ((smallino ? sizeof (grub_uint32_t)
|
||
: sizeof (grub_uint64_t))) - 1));
|
||
}
|
||
break;
|
||
}
|
||
|
||
case XFS_INODE_FORMAT_BTREE:
|
||
case XFS_INODE_FORMAT_EXT:
|
||
{
|
||
grub_ssize_t numread;
|
||
char *dirblock;
|
||
grub_uint64_t blk;
|
||
int dirblk_size, dirblk_log2;
|
||
|
||
dirblk_log2 = (dir->data->sblock.log2_bsize
|
||
+ dir->data->sblock.log2_dirblk);
|
||
dirblk_size = 1 << dirblk_log2;
|
||
|
||
dirblock = grub_malloc (dirblk_size);
|
||
if (! dirblock)
|
||
return 0;
|
||
|
||
/* Iterate over every block the directory has. */
|
||
for (blk = 0;
|
||
blk < (grub_be_to_cpu64 (dir->inode.size)
|
||
>> dirblk_log2);
|
||
blk++)
|
||
{
|
||
/* The header is skipped, the first direntry is stored
|
||
from byte 16. */
|
||
int pos = 16;
|
||
int entries;
|
||
int tail_start = (dirblk_size
|
||
- sizeof (struct grub_xfs_dirblock_tail));
|
||
|
||
struct grub_xfs_dirblock_tail *tail;
|
||
tail = (struct grub_xfs_dirblock_tail *) &dirblock[tail_start];
|
||
|
||
numread = grub_xfs_read_file (dir, 0,
|
||
blk << dirblk_log2,
|
||
dirblk_size, dirblock);
|
||
if (numread != dirblk_size)
|
||
return 0;
|
||
|
||
entries = (grub_be_to_cpu32 (tail->leaf_count)
|
||
- grub_be_to_cpu32 (tail->leaf_stale));
|
||
|
||
/* Iterate over all entries within this block. */
|
||
while (pos < (dirblk_size
|
||
- (int) sizeof (struct grub_xfs_dir2_entry)))
|
||
{
|
||
struct grub_xfs_dir2_entry *direntry;
|
||
grub_uint16_t *freetag;
|
||
char *filename;
|
||
|
||
direntry = (struct grub_xfs_dir2_entry *) &dirblock[pos];
|
||
freetag = (grub_uint16_t *) direntry;
|
||
|
||
if (*freetag == 0XFFFF)
|
||
{
|
||
grub_uint16_t *skip = (grub_uint16_t *) (freetag + 1);
|
||
|
||
/* This entry is not used, go to the next one. */
|
||
pos += grub_be_to_cpu16 (*skip);
|
||
|
||
continue;
|
||
}
|
||
|
||
filename = &dirblock[pos + sizeof (*direntry)];
|
||
/* The byte after the filename is for the tag, which
|
||
is not used by GRUB. So it can be overwritten. */
|
||
filename[direntry->len] = '\0';
|
||
|
||
if (call_hook (direntry->inode, filename))
|
||
{
|
||
grub_free (dirblock);
|
||
return 1;
|
||
}
|
||
|
||
/* Check if last direntry in this block is
|
||
reached. */
|
||
entries--;
|
||
if (!entries)
|
||
break;
|
||
|
||
/* Select the next directory entry. */
|
||
pos = GRUB_XFS_NEXT_DIRENT (pos, direntry->len);
|
||
pos = GRUB_XFS_ROUND_TO_DIRENT (pos);
|
||
}
|
||
}
|
||
grub_free (dirblock);
|
||
break;
|
||
}
|
||
|
||
default:
|
||
grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
|
||
"xfs does not support inode format %d yet",
|
||
diro->inode.format);
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
|
||
static struct grub_xfs_data *
|
||
grub_xfs_mount (grub_disk_t disk)
|
||
{
|
||
struct grub_xfs_data *data = 0;
|
||
|
||
data = grub_malloc (sizeof (struct grub_xfs_data));
|
||
if (!data)
|
||
return 0;
|
||
|
||
/* Read the superblock. */
|
||
if (grub_disk_read (disk, 0, 0,
|
||
sizeof (struct grub_xfs_sblock), (char *) &data->sblock))
|
||
goto fail;
|
||
|
||
if (grub_strncmp ((char *) (data->sblock.magic), "XFSB", 4))
|
||
{
|
||
grub_error (GRUB_ERR_BAD_FS, "not a xfs filesystem");
|
||
goto fail;
|
||
}
|
||
|
||
data->diropen.data = data;
|
||
data->diropen.ino = data->sblock.rootino;
|
||
data->diropen.inode_read = 1;
|
||
data->bsize = grub_be_to_cpu32 (data->sblock.bsize);
|
||
data->agsize = grub_be_to_cpu32 (data->sblock.agsize);
|
||
|
||
data->disk = disk;
|
||
data->inode = &data->diropen.inode;
|
||
data->pos = 0;
|
||
|
||
grub_xfs_read_inode (data, data->diropen.ino, data->inode);
|
||
|
||
return data;
|
||
fail:
|
||
|
||
if (grub_errno == GRUB_ERR_OUT_OF_RANGE)
|
||
grub_error (GRUB_ERR_BAD_FS, "not an xfs filesystem");
|
||
|
||
grub_free (data);
|
||
|
||
return 0;
|
||
}
|
||
|
||
|
||
static grub_err_t
|
||
grub_xfs_dir (grub_device_t device, const char *path,
|
||
int (*hook) (const char *filename, int dir))
|
||
{
|
||
struct grub_xfs_data *data = 0;;
|
||
struct grub_fshelp_node *fdiro = 0;
|
||
|
||
auto int NESTED_FUNC_ATTR iterate (const char *filename,
|
||
enum grub_fshelp_filetype filetype,
|
||
grub_fshelp_node_t node);
|
||
|
||
int NESTED_FUNC_ATTR iterate (const char *filename,
|
||
enum grub_fshelp_filetype filetype,
|
||
grub_fshelp_node_t node)
|
||
{
|
||
grub_free (node);
|
||
|
||
if (filetype == GRUB_FSHELP_DIR)
|
||
return hook (filename, 1);
|
||
else
|
||
return hook (filename, 0);
|
||
|
||
return 0;
|
||
}
|
||
|
||
#ifndef GRUB_UTIL
|
||
grub_dl_ref (my_mod);
|
||
#endif
|
||
|
||
data = grub_xfs_mount (device->disk);
|
||
if (!data)
|
||
goto fail;
|
||
|
||
grub_fshelp_find_file (path, &data->diropen, &fdiro, grub_xfs_iterate_dir,
|
||
grub_xfs_read_symlink, GRUB_FSHELP_DIR);
|
||
if (grub_errno)
|
||
goto fail;
|
||
|
||
grub_xfs_iterate_dir (fdiro, iterate);
|
||
|
||
fail:
|
||
if (fdiro != &data->diropen)
|
||
grub_free (fdiro);
|
||
grub_free (data);
|
||
|
||
#ifndef GRUB_UTIL
|
||
grub_dl_unref (my_mod);
|
||
#endif
|
||
|
||
return grub_errno;
|
||
|
||
return 0;
|
||
}
|
||
|
||
|
||
/* Open a file named NAME and initialize FILE. */
|
||
static grub_err_t
|
||
grub_xfs_open (struct grub_file *file, const char *name)
|
||
{
|
||
struct grub_xfs_data *data;
|
||
struct grub_fshelp_node *fdiro = 0;
|
||
|
||
#ifndef GRUB_UTIL
|
||
grub_dl_ref (my_mod);
|
||
#endif
|
||
|
||
data = grub_xfs_mount (file->device->disk);
|
||
if (!data)
|
||
goto fail;
|
||
|
||
grub_fshelp_find_file (name, &data->diropen, &fdiro, grub_xfs_iterate_dir,
|
||
grub_xfs_read_symlink, GRUB_FSHELP_REG);
|
||
if (grub_errno)
|
||
goto fail;
|
||
|
||
if (!fdiro->inode_read)
|
||
{
|
||
grub_xfs_read_inode (data, fdiro->ino, &fdiro->inode);
|
||
if (grub_errno)
|
||
goto fail;
|
||
}
|
||
|
||
grub_memcpy (data->inode,
|
||
&fdiro->inode,
|
||
sizeof (struct grub_xfs_inode));
|
||
grub_free (fdiro);
|
||
|
||
file->size = grub_be_to_cpu64 (data->inode->size);
|
||
file->data = data;
|
||
file->offset = 0;
|
||
|
||
return 0;
|
||
|
||
fail:
|
||
if (fdiro != &data->diropen)
|
||
grub_free (fdiro);
|
||
grub_free (data);
|
||
|
||
#ifndef GRUB_UTIL
|
||
grub_dl_unref (my_mod);
|
||
#endif
|
||
|
||
return grub_errno;
|
||
}
|
||
|
||
|
||
static grub_ssize_t
|
||
grub_xfs_read (grub_file_t file, char *buf, grub_size_t len)
|
||
{
|
||
struct grub_xfs_data *data =
|
||
(struct grub_xfs_data *) file->data;
|
||
|
||
return grub_xfs_read_file (&data->diropen, file->read_hook,
|
||
file->offset, len, buf);
|
||
}
|
||
|
||
|
||
static grub_err_t
|
||
grub_xfs_close (grub_file_t file)
|
||
{
|
||
grub_free (file->data);
|
||
|
||
#ifndef GRUB_UTIL
|
||
grub_dl_unref (my_mod);
|
||
#endif
|
||
|
||
return GRUB_ERR_NONE;
|
||
}
|
||
|
||
|
||
static grub_err_t
|
||
grub_xfs_label (grub_device_t device, char **label)
|
||
{
|
||
struct grub_xfs_data *data;
|
||
grub_disk_t disk = device->disk;
|
||
|
||
#ifndef GRUB_UTIL
|
||
grub_dl_ref (my_mod);
|
||
#endif
|
||
|
||
data = grub_xfs_mount (disk);
|
||
if (data)
|
||
*label = grub_strndup ((char *) (data->sblock.label), 12);
|
||
else
|
||
*label = 0;
|
||
|
||
#ifndef GRUB_UTIL
|
||
grub_dl_unref (my_mod);
|
||
#endif
|
||
|
||
grub_free (data);
|
||
|
||
return grub_errno;
|
||
}
|
||
|
||
static grub_err_t
|
||
grub_xfs_uuid (grub_device_t device, char **uuid)
|
||
{
|
||
struct grub_xfs_data *data;
|
||
grub_disk_t disk = device->disk;
|
||
|
||
#ifndef GRUB_UTIL
|
||
grub_dl_ref (my_mod);
|
||
#endif
|
||
|
||
data = grub_xfs_mount (disk);
|
||
if (data)
|
||
{
|
||
*uuid = grub_malloc (sizeof ("xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"));
|
||
grub_sprintf (*uuid, "%04x%04x-%04x-%04x-%04x-%04x%04x%04x",
|
||
grub_be_to_cpu16 (data->sblock.uuid[0]), grub_be_to_cpu16 (data->sblock.uuid[1]),
|
||
grub_be_to_cpu16 (data->sblock.uuid[2]), grub_be_to_cpu16 (data->sblock.uuid[3]),
|
||
grub_be_to_cpu16 (data->sblock.uuid[4]), grub_be_to_cpu16 (data->sblock.uuid[5]),
|
||
grub_be_to_cpu16 (data->sblock.uuid[6]), grub_be_to_cpu16 (data->sblock.uuid[7]));
|
||
}
|
||
else
|
||
*uuid = NULL;
|
||
|
||
#ifndef GRUB_UTIL
|
||
grub_dl_unref (my_mod);
|
||
#endif
|
||
|
||
grub_free (data);
|
||
|
||
return grub_errno;
|
||
}
|
||
|
||
|
||
|
||
static struct grub_fs grub_xfs_fs =
|
||
{
|
||
.name = "xfs",
|
||
.dir = grub_xfs_dir,
|
||
.open = grub_xfs_open,
|
||
.read = grub_xfs_read,
|
||
.close = grub_xfs_close,
|
||
.label = grub_xfs_label,
|
||
.uuid = grub_xfs_uuid,
|
||
.next = 0
|
||
};
|
||
|
||
GRUB_MOD_INIT(xfs)
|
||
{
|
||
grub_fs_register (&grub_xfs_fs);
|
||
#ifndef GRUB_UTIL
|
||
my_mod = mod;
|
||
#endif
|
||
}
|
||
|
||
GRUB_MOD_FINI(xfs)
|
||
{
|
||
grub_fs_unregister (&grub_xfs_fs);
|
||
}
|