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-rw-r--r--grub-core/fs/xfs.c837
1 files changed, 837 insertions, 0 deletions
diff --git a/grub-core/fs/xfs.c b/grub-core/fs/xfs.c
new file mode 100644
index 0000000..2eadc37
--- /dev/null
+++ b/grub-core/fs/xfs.c
@@ -0,0 +1,837 @@
+/* xfs.c - XFS. */
+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 2005,2006,2007,2008,2009 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>
+
+GRUB_MOD_LICENSE ("GPLv3+");
+
+#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 log2_sect;
+ grub_uint8_t log2_inode;
+ 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 smallino;
+ 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;
+ grub_uint64_t ino;
+ int inode_read;
+ struct grub_xfs_inode inode;
+};
+
+struct grub_xfs_data
+{
+ struct grub_xfs_sblock sblock;
+ grub_disk_t disk;
+ int pos;
+ int bsize;
+ int agsize;
+ struct grub_fshelp_node diropen;
+};
+
+static grub_dl_t my_mod;
+
+
+
+/* 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) & ((1LL << 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) & ((1LL << (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 grub_uint64_t
+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 >> data->sblock.log2_inop) + 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 << data->sblock.log2_inop) - 1)) <<
+ data->sblock.log2_inode);
+}
+
+
+static grub_err_t
+grub_xfs_read_inode (struct grub_xfs_data *data, grub_uint64_t ino,
+ struct grub_xfs_inode *inode)
+{
+ grub_uint64_t 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,
+ 1 << data->sblock.log2_inode, inode))
+ return grub_errno;
+
+ if (grub_strncmp ((char *) inode->magic, "IN", 2))
+ return grub_error (GRUB_ERR_BAD_FS, "not a correct XFS inode");
+
+ 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 + nrec])
+ << (node->data->sblock.log2_bsize
+ - GRUB_DISK_SECTOR_BITS),
+ 0, node->data->sblock.bsize, 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");
+ 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)
+ - sizeof (struct grub_xfs_inode)
+ + (1 << diro->data->sblock.log2_inode));
+ 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.smallino;
+ 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);
+ /* The header is a bit smaller than usual. */
+ de = (struct grub_xfs_dir_entry *) ((char *) de - 4);
+ }
+ else
+ {
+ parent = diro->inode.data.dir.dirhead.parent.i8;
+ }
+
+ /* 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;
+ grub_uint8_t *inopos = (((grub_uint8_t *) de)
+ + sizeof (struct grub_xfs_dir_entry)
+ + de->len - 1);
+ char name[de->len + 1];
+
+ /* inopos might be unaligned. */
+ if (smallino)
+ ino = (((grub_uint32_t) inopos[0]) << 24)
+ | (((grub_uint32_t) inopos[1]) << 16)
+ | (((grub_uint32_t) inopos[2]) << 8)
+ | (((grub_uint32_t) inopos[3]) << 0);
+ else
+ ino = (((grub_uint64_t) inopos[0]) << 56)
+ | (((grub_uint64_t) inopos[1]) << 48)
+ | (((grub_uint64_t) inopos[2]) << 40)
+ | (((grub_uint64_t) inopos[3]) << 32)
+ | (((grub_uint64_t) inopos[4]) << 24)
+ | (((grub_uint64_t) inopos[5]) << 16)
+ | (((grub_uint64_t) inopos[6]) << 8)
+ | (((grub_uint64_t) inopos[7]) << 0);
+ ino = grub_cpu_to_be64 (ino);
+
+ 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_zalloc (sizeof (struct grub_xfs_data));
+ if (!data)
+ return 0;
+
+ /* Read the superblock. */
+ if (grub_disk_read (disk, 0, 0,
+ sizeof (struct grub_xfs_sblock), &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 = grub_realloc (data,
+ sizeof (struct grub_xfs_data)
+ - sizeof (struct grub_xfs_inode)
+ + (1 << data->sblock.log2_inode));
+
+ if (! data)
+ 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->pos = 0;
+
+ grub_xfs_read_inode (data, data->diropen.ino, &data->diropen.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,
+ const struct grub_dirhook_info *info))
+{
+ 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)
+ {
+ struct grub_dirhook_info info;
+ grub_memset (&info, 0, sizeof (info));
+ info.dir = ((filetype & GRUB_FSHELP_TYPE_MASK) == GRUB_FSHELP_DIR);
+ grub_free (node);
+ return hook (filename, &info);
+ }
+
+ grub_dl_ref (my_mod);
+
+ data = grub_xfs_mount (device->disk);
+ if (!data)
+ goto mount_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);
+
+ mount_fail:
+
+ grub_dl_unref (my_mod);
+
+ return grub_errno;
+}
+
+
+/* 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;
+
+ grub_dl_ref (my_mod);
+
+ data = grub_xfs_mount (file->device->disk);
+ if (!data)
+ goto mount_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;
+ }
+
+ if (fdiro != &data->diropen)
+ grub_memcpy (&data->diropen, fdiro,
+ sizeof (struct grub_fshelp_node)
+ - sizeof (struct grub_xfs_inode)
+ + (1 << data->sblock.log2_inode));
+
+ file->size = grub_be_to_cpu64 (data->diropen.inode.size);
+ file->data = data;
+ file->offset = 0;
+
+ return 0;
+
+ fail:
+ if (fdiro != &data->diropen)
+ grub_free (fdiro);
+ grub_free (data);
+
+ mount_fail:
+ grub_dl_unref (my_mod);
+
+ 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);
+
+ grub_dl_unref (my_mod);
+
+ 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;
+
+ grub_dl_ref (my_mod);
+
+ data = grub_xfs_mount (disk);
+ if (data)
+ *label = grub_strndup ((char *) (data->sblock.label), 12);
+ else
+ *label = 0;
+
+ grub_dl_unref (my_mod);
+
+ 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;
+
+ grub_dl_ref (my_mod);
+
+ data = grub_xfs_mount (disk);
+ if (data)
+ {
+ *uuid = grub_xasprintf ("%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;
+
+ grub_dl_unref (my_mod);
+
+ 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,
+#ifdef GRUB_UTIL
+ .reserved_first_sector = 0,
+#endif
+ .next = 0
+ };
+
+GRUB_MOD_INIT(xfs)
+{
+ grub_fs_register (&grub_xfs_fs);
+ my_mod = mod;
+}
+
+GRUB_MOD_FINI(xfs)
+{
+ grub_fs_unregister (&grub_xfs_fs);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-17 17:46:13 +0000