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@@ -8,6 +8,7 @@
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#include <malloc.h>
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#include "ctree.h"
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#include "btrfs.h"
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+#include "disk-io.h"
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/*
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* Resolve the path of ino inside subvolume @root into @path_ret.
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@@ -74,6 +75,86 @@ out:
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return ret;
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}
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+static int list_one_subvol(struct btrfs_root *root, char *path_ret)
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+{
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+ struct btrfs_fs_info *fs_info = root->fs_info;
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+ struct btrfs_root *tree_root = fs_info->tree_root;
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+ struct btrfs_path path;
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+ struct btrfs_key key;
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+ char *tmp;
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+ u64 cur = root->root_key.objectid;
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+ int ret = 0;
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+
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+ tmp = malloc(PATH_MAX);
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+ if (!tmp)
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+ return -ENOMEM;
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+ tmp[0] = '\0';
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+ path_ret[0] = '\0';
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+ btrfs_init_path(&path);
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+ while (cur != BTRFS_FS_TREE_OBJECTID) {
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+ struct btrfs_root_ref *rr;
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+ struct btrfs_key location;
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+ int name_len;
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+ u64 ino;
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+
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+ key.objectid = cur;
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+ key.type = BTRFS_ROOT_BACKREF_KEY;
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+ key.offset = (u64)-1;
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+ btrfs_release_path(&path);
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+
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+ ret = btrfs_search_slot(NULL, tree_root, &key, &path, 0, 0);
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+ if (ret == 0)
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+ ret = -EUCLEAN;
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+ if (ret < 0)
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+ goto out;
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+ ret = btrfs_previous_item(tree_root, &path, cur,
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+ BTRFS_ROOT_BACKREF_KEY);
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+ if (ret > 0)
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+ ret = -ENOENT;
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+ if (ret < 0)
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+ goto out;
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+
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+ /* Get the subvolume name */
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+ rr = btrfs_item_ptr(path.nodes[0], path.slots[0],
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+ struct btrfs_root_ref);
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+ strncpy(tmp, path_ret, PATH_MAX);
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+ name_len = btrfs_root_ref_name_len(path.nodes[0], rr);
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+ if (name_len > BTRFS_NAME_LEN) {
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+ ret = -ENAMETOOLONG;
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+ goto out;
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+ }
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+ ino = btrfs_root_ref_dirid(path.nodes[0], rr);
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+ read_extent_buffer(path.nodes[0], path_ret,
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+ (unsigned long)(rr + 1), name_len);
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+ path_ret[name_len] = '/';
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+ path_ret[name_len + 1] = '\0';
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+ strncat(path_ret, tmp, PATH_MAX);
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+
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+ /* Get the path inside the parent subvolume */
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+ btrfs_item_key_to_cpu(path.nodes[0], &key, path.slots[0]);
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+ location.objectid = key.offset;
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+ location.type = BTRFS_ROOT_ITEM_KEY;
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+ location.offset = (u64)-1;
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+ root = btrfs_read_fs_root(fs_info, &location);
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+ if (IS_ERR(root)) {
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+ ret = PTR_ERR(root);
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+ goto out;
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+ }
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+ ret = get_path_in_subvol(root, ino, path_ret);
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+ if (ret < 0)
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+ goto out;
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+ cur = key.offset;
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+ }
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+ /* Add the leading '/' */
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+ strncpy(tmp, path_ret, PATH_MAX);
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+ strncpy(path_ret, "/", PATH_MAX);
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+ strncat(path_ret, tmp, PATH_MAX);
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+out:
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+ btrfs_release_path(&path);
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+ free(tmp);
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+ return ret;
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+}
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+
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static int get_subvol_name(u64 subvolid, char *name, int max_len)
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{
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struct btrfs_root_ref rref;
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