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Vladimir 'phcoder' Serbinenko 2010-12-01 16:36:05 +01:00
parent 355b3eed0f
commit df80cd06fb
1 changed files with 27 additions and 6 deletions
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33
grub-core/fs/btrfs.c
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@ -122,6 +122,9 @@ struct grub_btrfs_dir_item
grub_uint8_t dummy[8];
grub_uint16_t m;
grub_uint16_t n;
#define GRUB_BTRFS_DIR_ITEM_TYPE_REGULAR 1
#define GRUB_BTRFS_DIR_ITEM_TYPE_DIRECTORY 2
#define GRUB_BTRFS_DIR_ITEM_TYPE_SYMLINK 7
grub_uint8_t type;
char name[0];
} __attribute__ ((packed));
@ -605,7 +608,7 @@ static grub_err_t
find_path (struct grub_btrfs_data *data,
grub_disk_t disk,
const char *path, struct grub_btrfs_key *key,
grub_uint64_t *tree)
grub_uint64_t *tree, grub_uint8_t *type)
{
const char *slash;
grub_err_t err;
@ -615,17 +618,22 @@ find_path (struct grub_btrfs_data *data,
struct grub_btrfs_dir_item *direl = NULL;
struct grub_btrfs_key key_out;
*type = GRUB_BTRFS_DIR_ITEM_TYPE_DIRECTORY;
*tree = data->sblock.root_tree;
key->object_id = data->sblock.root_dir_objectid;
while (1)
{
key->type = GRUB_BTRFS_ITEM_TYPE_DIR_ITEM;
key->offset = 0;
while (path[0] == '/')
path++;
if (!path[0])
break;
if (*type != GRUB_BTRFS_DIR_ITEM_TYPE_DIRECTORY)
return grub_error (GRUB_ERR_BAD_FILE_TYPE, "not a directory");
key->type = GRUB_BTRFS_ITEM_TYPE_DIR_ITEM;
key->offset = 0;
slash = grub_strchr (path, '/');
if (!slash)
slash = path + grub_strlen (path);
@ -684,6 +692,13 @@ find_path (struct grub_btrfs_data *data,
}
path = slash;
*type = cdirel->type;
if (*type == GRUB_BTRFS_DIR_ITEM_TYPE_SYMLINK)
{
grub_free (direl);
return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
"symlinks not supported");
}
switch (cdirel->key.type)
{
@ -739,13 +754,16 @@ grub_btrfs_dir (grub_device_t device,
struct grub_btrfs_leaf_descriptor desc;
int r;
grub_uint64_t tree;
grub_uint8_t type;
if (!data)
return grub_errno;
err = find_path (data, device->disk, path, &key_in, &tree);
err = find_path (data, device->disk, path, &key_in, &tree, &type);
if (err)
return err;
if (type != GRUB_BTRFS_DIR_ITEM_TYPE_DIRECTORY)
return grub_error (GRUB_ERR_BAD_FILE_TYPE, "not a directory");
err = lower_bound (data, device->disk, &key_in, &key_out,
tree,
@ -800,7 +818,7 @@ grub_btrfs_dir (grub_device_t device,
c = cdirel->name[grub_le_to_cpu16 (cdirel->n)];
cdirel->name[grub_le_to_cpu16 (cdirel->n)] = 0;
grub_memset (&info, 0, sizeof (info));
info.dir = (cdirel->type == 2);
info.dir = (cdirel->type == GRUB_BTRFS_DIR_ITEM_TYPE_DIRECTORY);
if (hook (cdirel->name, &info))
goto out;
cdirel->name[grub_le_to_cpu16 (cdirel->n)] = c;
@ -827,16 +845,19 @@ grub_btrfs_open (struct grub_file *file, const char *name)
grub_disk_addr_t elemaddr;
grub_size_t elemsize;
struct grub_btrfs_inode inode;
grub_uint8_t type;
if (!data)
return grub_errno;
err = find_path (data, file->device->disk, name, &key_in, &data->tree);
err = find_path (data, file->device->disk, name, &key_in, &data->tree, &type);
if (err)
{
grub_free (data);
return err;
}
if (type != GRUB_BTRFS_DIR_ITEM_TYPE_REGULAR)
return grub_error (GRUB_ERR_BAD_FILE_TYPE, "not a regular file");
data->inode = key_in.object_id;
key_in.type = GRUB_BTRFS_ITEM_TYPE_INODE_ITEM;