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-rw-r--r--fs/btrfs/inode.c323
1 files changed, 0 insertions, 323 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 0c2b2b57054..ff330280e02 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -12,81 +12,6 @@
#include "disk-io.h"
#include "volumes.h"
-u64 __btrfs_lookup_inode_ref(struct __btrfs_root *root, u64 inr,
- struct btrfs_inode_ref *refp, char *name)
-{
- struct __btrfs_path path;
- struct btrfs_key *key;
- struct btrfs_inode_ref *ref;
- u64 res = -1ULL;
-
- key = btrfs_search_tree_key_type(root, inr, BTRFS_INODE_REF_KEY,
- &path);
-
- if (!key)
- return -1ULL;
-
- ref = btrfs_path_item_ptr(&path, struct btrfs_inode_ref);
- btrfs_inode_ref_to_cpu(ref);
-
- if (refp)
- *refp = *ref;
-
- if (name) {
- if (ref->name_len > BTRFS_NAME_LEN) {
- printf("%s: inode name too long: %u\n", __func__,
- ref->name_len);
- goto out;
- }
-
- memcpy(name, ref + 1, ref->name_len);
- }
-
- res = key->offset;
-out:
- __btrfs_free_path(&path);
- return res;
-}
-
-int __btrfs_lookup_inode(const struct __btrfs_root *root,
- struct btrfs_key *location,
- struct btrfs_inode_item *item,
- struct __btrfs_root *new_root)
-{
- struct __btrfs_root tmp_root = *root;
- struct __btrfs_path path;
- int res = -1;
-
- if (location->type == BTRFS_ROOT_ITEM_KEY) {
- if (btrfs_find_root(location->objectid, &tmp_root, NULL))
- return -1;
-
- location->objectid = tmp_root.root_dirid;
- location->type = BTRFS_INODE_ITEM_KEY;
- location->offset = 0;
- }
-
- if (btrfs_search_tree(&tmp_root, location, &path))
- return res;
-
- if (__btrfs_comp_keys(location, btrfs_path_leaf_key(&path)))
- goto out;
-
- if (item) {
- *item = *btrfs_path_item_ptr(&path, struct btrfs_inode_item);
- btrfs_inode_item_to_cpu(item);
- }
-
- if (new_root)
- *new_root = tmp_root;
-
- res = 0;
-
-out:
- __btrfs_free_path(&path);
- return res;
-}
-
/*
* Read the content of symlink inode @ino of @root, into @target.
* NOTE: @target will not be \0 termiated, caller should handle it properly.
@@ -143,28 +68,6 @@ out:
return ret;
}
-int __btrfs_readlink(const struct __btrfs_root *root, u64 inr, char *target)
-{
- struct btrfs_root *subvolume;
- struct btrfs_fs_info *fs_info = current_fs_info;
- struct btrfs_key key;
- int ret;
-
- ASSERT(fs_info);
- key.objectid = root->objectid;
- key.type = BTRFS_ROOT_ITEM_KEY;
- key.offset = (u64)-1;
- subvolume = btrfs_read_fs_root(fs_info, &key);
- if (IS_ERR(subvolume))
- return -1;
-
- ret = btrfs_readlink(subvolume, inr, target);
- if (ret < 0)
- return -1;
- target[ret] = '\0';
- return 0;
-}
-
static int lookup_root_ref(struct btrfs_fs_info *fs_info,
u64 rootid, u64 *root_ret, u64 *dir_ret)
{
@@ -274,58 +177,6 @@ out:
return ret;
}
-/* inr must be a directory (for regular files with multiple hard links this
- function returns only one of the parents of the file) */
-static u64 __get_parent_inode(struct __btrfs_root *root, u64 inr,
- struct btrfs_inode_item *inode_item)
-{
- struct btrfs_key key;
- u64 res;
-
- if (inr == BTRFS_FIRST_FREE_OBJECTID) {
- if (root->objectid != btrfs_info.fs_root.objectid) {
- u64 parent;
- struct btrfs_root_ref ref;
-
- parent = btrfs_lookup_root_ref(root->objectid, &ref,
- NULL);
- if (parent == -1ULL)
- return -1ULL;
-
- if (btrfs_find_root(parent, root, NULL))
- return -1ULL;
-
- inr = ref.dirid;
- }
-
- if (inode_item) {
- key.objectid = inr;
- key.type = BTRFS_INODE_ITEM_KEY;
- key.offset = 0;
-
- if (__btrfs_lookup_inode(root, &key, inode_item, NULL))
- return -1ULL;
- }
-
- return inr;
- }
-
- res = __btrfs_lookup_inode_ref(root, inr, NULL, NULL);
- if (res == -1ULL)
- return -1ULL;
-
- if (inode_item) {
- key.objectid = res;
- key.type = BTRFS_INODE_ITEM_KEY;
- key.offset = 0;
-
- if (__btrfs_lookup_inode(root, &key, inode_item, NULL))
- return -1ULL;
- }
-
- return res;
-}
-
static inline int next_length(const char *path)
{
int res = 0;
@@ -493,180 +344,6 @@ next:
return ret;
}
-u64 __btrfs_lookup_path(struct __btrfs_root *root, u64 inr, const char *path,
- u8 *type_p, struct btrfs_inode_item *inode_item_p,
- int symlink_limit)
-{
- struct btrfs_dir_item item;
- struct btrfs_inode_item inode_item;
- u8 type = BTRFS_FT_DIR;
- int len, have_inode = 0;
- const char *cur = path;
-
- if (*cur == '/') {
- ++cur;
- inr = root->root_dirid;
- }
-
- do {
- cur = skip_current_directories(cur);
-
- len = next_length(cur);
- if (len > BTRFS_NAME_LEN) {
- printf("%s: Name too long at \"%.*s\"\n", __func__,
- BTRFS_NAME_LEN, cur);
- return -1ULL;
- }
-
- if (len == 1 && cur[0] == '.')
- break;
-
- if (len == 2 && cur[0] == '.' && cur[1] == '.') {
- cur += 2;
- inr = __get_parent_inode(root, inr, &inode_item);
- if (inr == -1ULL)
- return -1ULL;
-
- type = BTRFS_FT_DIR;
- continue;
- }
-
- if (!*cur)
- break;
-
- if (__btrfs_lookup_dir_item(root, inr, cur, len, &item))
- return -1ULL;
-
- type = item.type;
- have_inode = 1;
- if (__btrfs_lookup_inode(root, (struct btrfs_key *)&item.location,
- &inode_item, root))
- return -1ULL;
-
- if (item.type == BTRFS_FT_SYMLINK && symlink_limit >= 0) {
- char *target;
-
- if (!symlink_limit) {
- printf("%s: Too much symlinks!\n", __func__);
- return -1ULL;
- }
-
- target = malloc(min(inode_item.size + 1,
- (u64) btrfs_info.sb.sectorsize));
- if (!target)
- return -1ULL;
-
- if (__btrfs_readlink(root, item.location.objectid,
- target)) {
- free(target);
- return -1ULL;
- }
-
- inr = __btrfs_lookup_path(root, inr, target, &type,
- &inode_item, symlink_limit - 1);
-
- free(target);
-
- if (inr == -1ULL)
- return -1ULL;
- } else if (item.type != BTRFS_FT_DIR && cur[len]) {
- printf("%s: \"%.*s\" not a directory\n", __func__,
- (int) (cur - path + len), path);
- return -1ULL;
- } else {
- inr = item.location.objectid;
- }
-
- cur += len;
- } while (*cur);
-
- if (type_p)
- *type_p = type;
-
- if (inode_item_p) {
- if (!have_inode) {
- struct btrfs_key key;
-
- key.objectid = inr;
- key.type = BTRFS_INODE_ITEM_KEY;
- key.offset = 0;
-
- if (__btrfs_lookup_inode(root, &key, &inode_item, NULL))
- return -1ULL;
- }
-
- *inode_item_p = inode_item;
- }
-
- return inr;
-}
-
-u64 __btrfs_file_read(const struct __btrfs_root *root, u64 inr, u64 offset,
- u64 size, char *buf)
-{
- struct __btrfs_path path;
- struct btrfs_key key;
- struct btrfs_file_extent_item *extent;
- int res = 0;
- u64 rd, rd_all = -1ULL;
-
- key.objectid = inr;
- key.type = BTRFS_EXTENT_DATA_KEY;
- key.offset = offset;
-
- if (btrfs_search_tree(root, &key, &path))
- return -1ULL;
-
- if (__btrfs_comp_keys(&key, btrfs_path_leaf_key(&path)) < 0) {
- if (btrfs_prev_slot(&path))
- goto out;
-
- if (btrfs_comp_keys_type(&key, btrfs_path_leaf_key(&path)))
- goto out;
- }
-
- rd_all = 0;
-
- do {
- if (btrfs_comp_keys_type(&key, btrfs_path_leaf_key(&path)))
- break;
-
- extent = btrfs_path_item_ptr(&path,
- struct btrfs_file_extent_item);
-
- if (extent->type == BTRFS_FILE_EXTENT_INLINE) {
- btrfs_file_extent_item_to_cpu_inl(extent);
- rd = __btrfs_read_extent_inline(&path, extent, offset,
- size, buf);
- } else {
- btrfs_file_extent_item_to_cpu(extent);
- rd = __btrfs_read_extent_reg(&path, extent, offset, size,
- buf);
- }
-
- if (rd == -1ULL) {
- printf("%s: Error reading extent\n", __func__);
- rd_all = -1;
- goto out;
- }
-
- offset = 0;
- buf += rd;
- rd_all += rd;
- size -= rd;
-
- if (!size)
- break;
- } while (!(res = btrfs_next_slot(&path)));
-
- if (res)
- return -1ULL;
-
-out:
- __btrfs_free_path(&path);
- return rd_all;
-}
-
/*
* Read out inline extent.
*
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-10 07:16:39 +0000