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linux-stable/fs/bcachefs/subvolume.h

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bcachefs: Subvolumes, snapshots This patch adds subvolume.c - support for the subvolumes and snapshots btrees and related data types and on disk data structures. The next patches will start hooking up this new code to existing code. Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
2021-03-16 04:42:25 +00:00
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _BCACHEFS_SUBVOLUME_H
#define _BCACHEFS_SUBVOLUME_H
bcachefs: darrays Inspired by CCAN darray - simple, stupid resizable (dynamic) arrays. Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
2022-03-29 19:48:45 +00:00
#include "darray.h"
bcachefs: Add BCH_SUBVOLUME_UNLINKED Snapshot deletion needs to become a multi step process, where we unlink, then tear down the page cache, then delete the subvolume - the deleting flag is equivalent to an inode with i_nlink = 0. Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
2021-10-11 16:03:19 +00:00
#include "subvolume_types.h"
bcachefs: Change check for invalid key types As part of the forward compatibility patch series, we need to allow for new key types without complaining loudly when running an old version. This patch changes the flags parameter of bkey_invalid to an enum, and adds a new flag to indicate we're being called from the transaction commit path. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2023-07-07 01:16:10 +00:00
enum bkey_invalid_flags;
bcachefs: Enumerate recovery passes Recovery and fsck have many different passes/jobs to do, which always run in the same order - but not all of them run all the time. Some are for fsck, some for unclean shutdown, some for version upgrades. This adds some new structure: a defined list of recovery passes that we can run in a loop, as well as consolidating the log messages. The main benefit is consolidating the "should run this recovery pass" logic, as well as cleaning up the "this recovery pass has finished" state; instead of having a bunch of ad-hoc state bits in c->flags, we've now got c->curr_recovery_pass. By consolidating the "should run this recovery pass" logic, in the future on disk format upgrades will be able to say "upgrading to this version requires x passes to run", instead of forcing all of fsck to run. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2023-07-07 06:42:28 +00:00
int bch2_check_subvols(struct bch_fs *);
bcachefs: BTREE_ID_subvolume_children Add a btree to record a parent -> child subvolume relationships, according to the filesystem heirarchy. The subvolume_children btree is a bitset btree: if a bit is set at pos p, that means p.offset is a child of subvolume p.inode. This will be used for efficiently listing subvolumes, as well as recursive deletion. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-21 11:00:07 +00:00
int bch2_check_subvol_children(struct bch_fs *);
bcachefs: Fix subvol/snapshot deleting in recovery fsck doesn't want to run while we're cleaning up deleted snapshots - if that work needs to be done, we want it to have finished before fsck runs, otherwise fsck will get confused when it finds multiple keys in the same snapshot ID equivalence class (i.e. the mechanism that snapshot deletion uses for cleaning up redundant keys). Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
2022-07-14 05:10:24 +00:00
bcachefs: Enumerate fsck errors This patch adds a superblock error counter for every distinct fsck error; this means that when analyzing filesystems out in the wild we'll be able to see what sorts of inconsistencies are being found and repair, and hence what bugs to look for. Errors validating bkeys are not yet considered distinct fsck errors, but this patch adds a new helper, bkey_fsck_err(), in order to add distinct error types for them as well. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2023-10-25 00:44:36 +00:00
int bch2_subvolume_invalid(struct bch_fs *, struct bkey_s_c,
bcachefs: Fix -Wincompatible-function-pointer-types-strict from key_invalid callbacks When building bcachefs with -Wincompatible-function-pointer-types-strict, a clang warning designed to catch issues with mismatched function pointer types, which will be fatal at runtime due to kernel Control Flow Integrity (kCFI), there are several instances along the lines of: fs/bcachefs/bkey_methods.c:118:2: error: incompatible function pointer types initializing 'int (*)(const struct bch_fs *, struct bkey_s_c, enum bkey_invalid_flags, struct printbuf *)' with an expression of type 'int (const struct bch_fs *, struct bkey_s_c, unsigned int, struct printbuf *)' [-Werror,-Wincompatible-function-pointer-types-strict] 118 | BCH_BKEY_TYPES() | ^~~~~~~~~~~~~~~~ fs/bcachefs/bcachefs_format.h:342:2: note: expanded from macro 'BCH_BKEY_TYPES' 342 | x(deleted, 0) \ | ^~~~~~~~~~~~~~~~~~~~~~~~~~ fs/bcachefs/bkey_methods.c:117:41: note: expanded from macro 'x' 117 | #define x(name, nr) [KEY_TYPE_##name] = bch2_bkey_ops_##name, | ^~~~~~~~~~~~~~~~~~~~ <scratch space>:206:1: note: expanded from here 206 | bch2_bkey_ops_deleted | ^~~~~~~~~~~~~~~~~~~~~ fs/bcachefs/bkey_methods.c:34:17: note: expanded from macro 'bch2_bkey_ops_deleted' 34 | .key_invalid = deleted_key_invalid, \ | ^~~~~~~~~~~~~~~~~~~ The flags parameter should be of type 'enum bkey_invalid_flags', not 'unsigned int'. Adjust the type everywhere so that there is no more warning. Signed-off-by: Nathan Chancellor <nathan@kernel.org> Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2023-09-12 19:15:42 +00:00
enum bkey_invalid_flags, struct printbuf *);
bcachefs: Subvolumes, snapshots This patch adds subvolume.c - support for the subvolumes and snapshots btrees and related data types and on disk data structures. The next patches will start hooking up this new code to existing code. Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
2021-03-16 04:42:25 +00:00
void bch2_subvolume_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);
bcachefs: BTREE_ID_subvolume_children Add a btree to record a parent -> child subvolume relationships, according to the filesystem heirarchy. The subvolume_children btree is a bitset btree: if a bit is set at pos p, that means p.offset is a child of subvolume p.inode. This will be used for efficiently listing subvolumes, as well as recursive deletion. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-21 11:00:07 +00:00
int bch2_subvolume_trigger(struct btree_trans *, enum btree_id, unsigned,
struct bkey_s_c, struct bkey_s, unsigned);
bcachefs: Subvolumes, snapshots This patch adds subvolume.c - support for the subvolumes and snapshots btrees and related data types and on disk data structures. The next patches will start hooking up this new code to existing code. Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
2021-03-16 04:42:25 +00:00
bcachefs: More style fixes Fixes for various checkpatch errors. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2022-10-22 19:59:53 +00:00
#define bch2_bkey_ops_subvolume ((struct bkey_ops) { \
bcachefs: Subvolumes, snapshots This patch adds subvolume.c - support for the subvolumes and snapshots btrees and related data types and on disk data structures. The next patches will start hooking up this new code to existing code. Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
2021-03-16 04:42:25 +00:00
.key_invalid = bch2_subvolume_invalid, \
.val_to_text = bch2_subvolume_to_text, \
bcachefs: BTREE_ID_subvolume_children Add a btree to record a parent -> child subvolume relationships, according to the filesystem heirarchy. The subvolume_children btree is a bitset btree: if a bit is set at pos p, that means p.offset is a child of subvolume p.inode. This will be used for efficiently listing subvolumes, as well as recursive deletion. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-21 11:00:07 +00:00
.trigger = bch2_subvolume_trigger, \
bcachefs: bkey_ops.min_val_size This adds a new field to bkey_ops for the minimum size of the value, which standardizes that check and also enforces the new rule (previously done somewhat ad-hoc) that we can extend value types by adding new fields on to the end. To make that work we do _not_ initialize min_val_size with sizeof, instead we initialize it to the size of the first version of those values. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2023-04-29 17:24:18 +00:00
.min_val_size = 16, \
bcachefs: More style fixes Fixes for various checkpatch errors. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2022-10-22 19:59:53 +00:00
})
bcachefs: Subvolumes, snapshots This patch adds subvolume.c - support for the subvolumes and snapshots btrees and related data types and on disk data structures. The next patches will start hooking up this new code to existing code. Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
2021-03-16 04:42:25 +00:00
bcachefs: Check for subvolume children when deleting subvolumes Recursively destroying subvolumes isn't allowed yet. Fixes: https://github.com/koverstreet/bcachefs/issues/634 Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-02-10 02:01:04 +00:00
int bch2_subvol_has_children(struct btree_trans *, u32);
bcachefs: bch2_subvolume_get() Factor out a little helper. Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
2021-09-30 23:46:23 +00:00
int bch2_subvolume_get(struct btree_trans *, unsigned,
bool, int, struct bch_subvolume *);
bcachefs: Subvolumes, snapshots This patch adds subvolume.c - support for the subvolumes and snapshots btrees and related data types and on disk data structures. The next patches will start hooking up this new code to existing code. Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
2021-03-16 04:42:25 +00:00
int bch2_subvolume_get_snapshot(struct btree_trans *, u32, u32 *);
bcachefs: make RO snapshots actually RO Add checks to all the VFS paths for "are we in a RO snapshot?". Note - we don't check this when setting inode options via our xattr interface, since those generally only affect data placement, not contents of data. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> Reported-by: "Carl E. Thompson" <list-bcachefs@carlthompson.net>
2023-12-30 02:16:32 +00:00
int bch2_subvol_is_ro_trans(struct btree_trans *, u32);
int bch2_subvol_is_ro(struct bch_fs *, u32);
bcachefs: Fix subvol/snapshot deleting in recovery fsck doesn't want to run while we're cleaning up deleted snapshots - if that work needs to be done, we want it to have finished before fsck runs, otherwise fsck will get confused when it finds multiple keys in the same snapshot ID equivalence class (i.e. the mechanism that snapshot deletion uses for cleaning up redundant keys). Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
2022-07-14 05:10:24 +00:00
int bch2_delete_dead_snapshots(struct bch_fs *);
void bch2_delete_dead_snapshots_async(struct bch_fs *);
bcachefs: Add BCH_SUBVOLUME_UNLINKED Snapshot deletion needs to become a multi step process, where we unlink, then tear down the page cache, then delete the subvolume - the deleting flag is equivalent to an inode with i_nlink = 0. Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
2021-10-11 16:03:19 +00:00
int bch2_subvolume_unlink(struct btree_trans *, u32);
bcachefs: bch_subvolume::fs_path_parent Record the filesystem path heirarchy for subvolumes in bch_subvolume Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-02-08 23:39:42 +00:00
int bch2_subvolume_create(struct btree_trans *, u64, u32, u32, u32 *, u32 *, bool);
bcachefs: Subvolumes, snapshots This patch adds subvolume.c - support for the subvolumes and snapshots btrees and related data types and on disk data structures. The next patches will start hooking up this new code to existing code. Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
2021-03-16 04:42:25 +00:00
int bch2_fs_subvolumes_init(struct bch_fs *);
#endif /* _BCACHEFS_SUBVOLUME_H */
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