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Implement bookmark copying

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This feature allows copying existing bookmarks using

    zfs bookmark fs#target fs#newbookmark

There are some niche use cases for such functionality,
e.g. when using bookmarks as markers for replication progress.

Copying redaction bookmarks produces a normal bookmark that
cannot be used for redacted send (we are not duplicating
the redaction object).

ZCP support for bookmarking (both creation and copying) will be
implemented in a separate patch based on this work.

Overview:

- Terminology:
    - source = existing snapshot or bookmark
    - new/bmark = new bookmark
- Implement bookmark copying in `dsl_bookmark.c`
  - create new bookmark node
  - copy source's `zbn_phys` to new's `zbn_phys`
  - zero-out redaction object id in copy
- Extend existing bookmark ioctl nvlist schema to accept
  bookmarks as sources
  - => `dsl_bookmark_create_nvl_validate` is authoritative
- use `dsl_dataset_is_before` check for both snapshot
  and bookmark sources
- Adjust CLI
  - refactor shortname expansion logic in `zfs_do_bookmark`
- Update man pages
  - warn about redaction bookmark handling
- Add test cases
  - CLI
  - pyyzfs libzfs_core bindings

Reviewed-by: Matt Ahrens <matt@delphix.com>
Reviewed-by: Paul Dagnelie <pcd@delphix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Christian Schwarz <me@cschwarz.com>
Closes #9571
This commit is contained in:
Christian Schwarz
2019-11-10 23:24:14 -08:00
committed by Brian Behlendorf
parent 7b49bbc816
commit a73f361fdb
19 changed files with 672 additions and 142 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/zfs_namecheck.h
+3
View File
@@ -46,6 +46,7 @@ typedef enum {
NAME_ERR_SELF_REF, /* reserved self path name ('.') */
NAME_ERR_PARENT_REF, /* reserved parent path name ('..') */
NAME_ERR_NO_AT, /* permission set is missing '@' */
NAME_ERR_NO_POUND, /* permission set is missing '#' */
} namecheck_err_t;
#define ZFS_PERMSET_MAXLEN 64
@@ -56,6 +57,8 @@ int get_dataset_depth(const char *);
int pool_namecheck(const char *, namecheck_err_t *, char *);
int entity_namecheck(const char *, namecheck_err_t *, char *);
int dataset_namecheck(const char *, namecheck_err_t *, char *);
int snapshot_namecheck(const char *, namecheck_err_t *, char *);
int bookmark_namecheck(const char *, namecheck_err_t *, char *);
int dataset_nestcheck(const char *);
int mountpoint_namecheck(const char *, namecheck_err_t *);
int zfs_component_namecheck(const char *, namecheck_err_t *, char *);