diff options
author | Nicholas D Steeves <nsteeves@gmail.com> | 2016-04-23 00:41:30 +0100 |
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committer | Nicholas D Steeves <nsteeves@gmail.com> | 2016-04-23 00:41:30 +0100 |
commit | cec572daccafa1e912cbed363df6f84687778c6f (patch) | |
tree | 7d99ab9f73d25c1ed8eaf6393f6374edf5316b03 /send-utils.h |
btrfs-progs (4.4.1-1.1) unstable; urgency=medium
* Non-maintainer upload.
* New upstream release.
* Rename package to btrfs-progs (Closes: #780081)
* Update standards version to 3.9.7 (no changes needed).
* debian/control: Add "Breaks" per Gianfranco Costamagna's suggestion
* Change lintian override to reflect package rename
* Switch from using postinst and postrm to using triggers
per Christian Seiler's recommendation.
# imported from the archive
Diffstat (limited to 'send-utils.h')
-rw-r--r-- | send-utils.h | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/send-utils.h b/send-utils.h new file mode 100644 index 00000000..677a1db2 --- /dev/null +++ b/send-utils.h @@ -0,0 +1,108 @@ +/* + * Copyright (C) 2012 Alexander Block. All rights reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public + * License v2 as published by the Free Software Foundation. + * + * This program 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 this program; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 021110-1307, USA. + */ + +#ifndef __BTRFS_SEND_UTILS_H__ +#define __BTRFS_SEND_UTILS_H__ + +#if BTRFS_FLAT_INCLUDES +#include "kerncompat.h" +#include "ctree.h" +#include "rbtree.h" +#else +#include <btrfs/kerncompat.h> +#include <btrfs/ctree.h> +#include <btrfs/rbtree.h> +#endif /* BTRFS_FLAT_INCLUDES */ + +#ifdef __cplusplus +extern "C" { +#endif + +/* + * Compatibility code for kernels < 3.12; the UUID tree is not available there + * and we have to do the slow search. This should be deprecated someday. + */ +#define BTRFS_COMPAT_SEND_NO_UUID_TREE 1 + +enum subvol_search_type { + subvol_search_by_root_id, + subvol_search_by_uuid, + subvol_search_by_received_uuid, + subvol_search_by_path, +}; + +struct subvol_info { +#ifdef BTRFS_COMPAT_SEND_NO_UUID_TREE + struct rb_node rb_root_id_node; + struct rb_node rb_local_node; + struct rb_node rb_received_node; + struct rb_node rb_path_node; +#endif + + u64 root_id; + u8 uuid[BTRFS_UUID_SIZE]; + u8 parent_uuid[BTRFS_UUID_SIZE]; + u8 received_uuid[BTRFS_UUID_SIZE]; + u64 ctransid; + u64 otransid; + u64 stransid; + u64 rtransid; + + char *path; +}; + +struct subvol_uuid_search { + int mnt_fd; +#ifdef BTRFS_COMPAT_SEND_NO_UUID_TREE + int uuid_tree_existed; + + struct rb_root root_id_subvols; + struct rb_root local_subvols; + struct rb_root received_subvols; + struct rb_root path_subvols; +#endif +}; + +int subvol_uuid_search_init(int mnt_fd, struct subvol_uuid_search *s); +void subvol_uuid_search_finit(struct subvol_uuid_search *s); +struct subvol_info *subvol_uuid_search(struct subvol_uuid_search *s, + u64 root_id, const u8 *uuid, u64 transid, + const char *path, + enum subvol_search_type type); +void subvol_uuid_search_add(struct subvol_uuid_search *s, + struct subvol_info *si); + +int btrfs_subvolid_resolve(int fd, char *path, size_t path_len, u64 subvol_id); + +/* + * DEPRECATED: the functions path_cat and path_cat3 are unsafe and should not + * be used, use the _out variants and always check the return code. + */ +__attribute__((deprecated)) +char *path_cat(const char *p1, const char *p2); +__attribute__((deprecated)) +char *path_cat3(const char *p1, const char *p2, const char *p3); + +int path_cat_out(char *out, const char *p1, const char *p2); +int path_cat3_out(char *out, const char *p1, const char *p2, const char *p3); + +#ifdef __cplusplus +} +#endif + +#endif |