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linux/fs/bcachefs/namei.h

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bcachefs: Factor out fs-common.c This refactoring makes the code easier to understand by separating the bcachefs btree transactional code from the linux VFS code - but more importantly, it's also to share code with the fuse port. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2019-10-02 18:35:36 -04:00
/* SPDX-License-Identifier: GPL-2.0 */
bcachefs: fs-common.c -> namei.c name <-> inode, code for managing the relationships between inodes and dirents. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2025-03-20 10:53:52 -04:00
#ifndef _BCACHEFS_NAMEI_H
#define _BCACHEFS_NAMEI_H
bcachefs: Factor out fs-common.c This refactoring makes the code easier to understand by separating the bcachefs btree transactional code from the linux VFS code - but more importantly, it's also to share code with the fuse port. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2019-10-02 18:35:36 -04:00
bcachefs: fix missing include fs-common.h needs dirent.h for enum bch_rename_mode Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-06-17 13:58:17 -04:00
#include "dirent.h"
bcachefs: Factor out fs-common.c This refactoring makes the code easier to understand by separating the bcachefs btree transactional code from the linux VFS code - but more importantly, it's also to share code with the fuse port. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2019-10-02 18:35:36 -04:00
struct posix_acl;
bcachefs: Plumb through subvolume id To implement snapshots, we need every filesystem btree operation (every btree operation without a subvolume) to start by looking up the subvolume and getting the current snapshot ID, with bch2_subvolume_get_snapshot() - then, that snapshot ID is used for doing btree lookups in BTREE_ITER_FILTER_SNAPSHOTS mode. This patch adds those bch2_subvolume_get_snapshot() calls, and also switches to passing around a subvol_inum instead of just an inode number. Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
2021-03-16 00:28:17 -04:00
#define BCH_CREATE_TMPFILE (1U << 0)
bcachefs: Snapshot creation, deletion This is the final patch in the patch series implementing snapshots. This patch implements two new ioctls that work like creation and deletion of directories, but fancier. - BCH_IOCTL_SUBVOLUME_CREATE, for creating new subvolumes and snaphots - BCH_IOCTL_SUBVOLUME_DESTROY, for deleting subvolumes and snapshots Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
2021-03-16 23:28:43 -04:00
#define BCH_CREATE_SUBVOL (1U << 1)
#define BCH_CREATE_SNAPSHOT (1U << 2)
#define BCH_CREATE_SNAPSHOT_RO (1U << 3)
bcachefs: Plumb through subvolume id To implement snapshots, we need every filesystem btree operation (every btree operation without a subvolume) to start by looking up the subvolume and getting the current snapshot ID, with bch2_subvolume_get_snapshot() - then, that snapshot ID is used for doing btree lookups in BTREE_ITER_FILTER_SNAPSHOTS mode. This patch adds those bch2_subvolume_get_snapshot() calls, and also switches to passing around a subvol_inum instead of just an inode number. Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
2021-03-16 00:28:17 -04:00
int bch2_create_trans(struct btree_trans *, subvol_inum,
bcachefs: Factor out fs-common.c This refactoring makes the code easier to understand by separating the bcachefs btree transactional code from the linux VFS code - but more importantly, it's also to share code with the fuse port. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2019-10-02 18:35:36 -04:00
struct bch_inode_unpacked *,
struct bch_inode_unpacked *,
const struct qstr *,
uid_t, gid_t, umode_t, dev_t,
struct posix_acl *,
bcachefs: Plumb through subvolume id To implement snapshots, we need every filesystem btree operation (every btree operation without a subvolume) to start by looking up the subvolume and getting the current snapshot ID, with bch2_subvolume_get_snapshot() - then, that snapshot ID is used for doing btree lookups in BTREE_ITER_FILTER_SNAPSHOTS mode. This patch adds those bch2_subvolume_get_snapshot() calls, and also switches to passing around a subvol_inum instead of just an inode number. Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
2021-03-16 00:28:17 -04:00
struct posix_acl *,
bcachefs: Snapshot creation, deletion This is the final patch in the patch series implementing snapshots. This patch implements two new ioctls that work like creation and deletion of directories, but fancier. - BCH_IOCTL_SUBVOLUME_CREATE, for creating new subvolumes and snaphots - BCH_IOCTL_SUBVOLUME_DESTROY, for deleting subvolumes and snapshots Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
2021-03-16 23:28:43 -04:00
subvol_inum, unsigned);
bcachefs: Factor out fs-common.c This refactoring makes the code easier to understand by separating the bcachefs btree transactional code from the linux VFS code - but more importantly, it's also to share code with the fuse port. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2019-10-02 18:35:36 -04:00
bcachefs: Plumb through subvolume id To implement snapshots, we need every filesystem btree operation (every btree operation without a subvolume) to start by looking up the subvolume and getting the current snapshot ID, with bch2_subvolume_get_snapshot() - then, that snapshot ID is used for doing btree lookups in BTREE_ITER_FILTER_SNAPSHOTS mode. This patch adds those bch2_subvolume_get_snapshot() calls, and also switches to passing around a subvol_inum instead of just an inode number. Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
2021-03-16 00:28:17 -04:00
int bch2_link_trans(struct btree_trans *,
subvol_inum, struct bch_inode_unpacked *,
subvol_inum, struct bch_inode_unpacked *,
bcachefs: Factor out fs-common.c This refactoring makes the code easier to understand by separating the bcachefs btree transactional code from the linux VFS code - but more importantly, it's also to share code with the fuse port. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2019-10-02 18:35:36 -04:00
const struct qstr *);
bcachefs: Plumb through subvolume id To implement snapshots, we need every filesystem btree operation (every btree operation without a subvolume) to start by looking up the subvolume and getting the current snapshot ID, with bch2_subvolume_get_snapshot() - then, that snapshot ID is used for doing btree lookups in BTREE_ITER_FILTER_SNAPSHOTS mode. This patch adds those bch2_subvolume_get_snapshot() calls, and also switches to passing around a subvol_inum instead of just an inode number. Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
2021-03-16 00:28:17 -04:00
int bch2_unlink_trans(struct btree_trans *, subvol_inum,
struct bch_inode_unpacked *,
bcachefs: Factor out fs-common.c This refactoring makes the code easier to understand by separating the bcachefs btree transactional code from the linux VFS code - but more importantly, it's also to share code with the fuse port. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2019-10-02 18:35:36 -04:00
struct bch_inode_unpacked *,
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 12:03:19 -04:00
const struct qstr *, bool);
bcachefs: Factor out fs-common.c This refactoring makes the code easier to understand by separating the bcachefs btree transactional code from the linux VFS code - but more importantly, it's also to share code with the fuse port. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2019-10-02 18:35:36 -04:00
int bch2_rename_trans(struct btree_trans *,
bcachefs: Plumb through subvolume id To implement snapshots, we need every filesystem btree operation (every btree operation without a subvolume) to start by looking up the subvolume and getting the current snapshot ID, with bch2_subvolume_get_snapshot() - then, that snapshot ID is used for doing btree lookups in BTREE_ITER_FILTER_SNAPSHOTS mode. This patch adds those bch2_subvolume_get_snapshot() calls, and also switches to passing around a subvol_inum instead of just an inode number. Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
2021-03-16 00:28:17 -04:00
subvol_inum, struct bch_inode_unpacked *,
subvol_inum, struct bch_inode_unpacked *,
bcachefs: Factor out fs-common.c This refactoring makes the code easier to understand by separating the bcachefs btree transactional code from the linux VFS code - but more importantly, it's also to share code with the fuse port. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2019-10-02 18:35:36 -04:00
struct bch_inode_unpacked *,
struct bch_inode_unpacked *,
const struct qstr *,
const struct qstr *,
enum bch_rename_mode);
bool bch2_reinherit_attrs(struct bch_inode_unpacked *,
struct bch_inode_unpacked *);
bcachefs: bch2_inum_to_path() Add a function for walking backpointers to find a path from a given inode number, and convert various error messages to use it. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-09-28 15:40:49 -04:00
int bch2_inum_to_path(struct btree_trans *, subvol_inum, struct printbuf *);
bcachefs: bch2_inum_snapshot_to_path() Add a better helper for printing out paths of inodes when we don't know the subvolume, for fsck. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2025-05-19 09:48:50 -04:00
int bch2_inum_snapshot_to_path(struct btree_trans *, u64, u32,
snapshot_id_list *, struct printbuf *);
bcachefs: bch2_inum_to_path() Add a function for walking backpointers to find a path from a given inode number, and convert various error messages to use it. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-09-28 15:40:49 -04:00
bcachefs: Refactor bch2_check_dirent_target() Prep work for calling bch2_check_dirent_target() from bch2_lookup(). - Add an inline wrapper, if the target and backpointer match we can skip the function call. - We don't (yet?) want to remove the dirent we did the lookup from (when we find a directory or subvol with multiple valid dirents pointing to it), we can defer on that until later. For now, add an "are we in fsck?" parameter. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2025-03-20 11:06:50 -04:00
int __bch2_check_dirent_target(struct btree_trans *,
struct btree_iter *,
struct bkey_s_c_dirent,
struct bch_inode_unpacked *, bool);
static inline bool inode_points_to_dirent(struct bch_inode_unpacked *inode,
struct bkey_s_c_dirent d)
{
return inode->bi_dir == d.k->p.inode &&
inode->bi_dir_offset == d.k->p.offset;
}
static inline int bch2_check_dirent_target(struct btree_trans *trans,
struct btree_iter *dirent_iter,
struct bkey_s_c_dirent d,
struct bch_inode_unpacked *target,
bool in_fsck)
{
if (likely(inode_points_to_dirent(target, d) &&
d.v->d_type == inode_d_type(target)))
return 0;
return __bch2_check_dirent_target(trans, dirent_iter, d, target, in_fsck);
}
bcachefs: Move bch2_check_dirent_target() to namei.c We're gradually running more and more fsck.c checks at runtime, whereever applicable; when we do so they get moved out of fsck.c. Next patch will call bch2_check_dirent_target() from bch2_lookup(). Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2025-03-20 11:06:50 -04:00
bcachefs: BCH_INODE_has_case_insensitive Add a flag for tracking whether a directory has case-insensitive descendents - so that overlayfs can disallow mounting, even though the filesystem supports case insensitivity. This is a new on disk format version, with a (cheap) upgrade to ensure the flag is correctly set on existing inodes. Create, rename and fssetxattr are all plumbed to ensure the new flag is set, and we've got new fsck code that hooks into check_inode(0. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2025-05-19 10:31:44 -04:00
int bch2_maybe_propagate_has_case_insensitive(struct btree_trans *, subvol_inum,
struct bch_inode_unpacked *);
int bch2_check_inode_has_case_insensitive(struct btree_trans *, struct bch_inode_unpacked *,
snapshot_id_list *, bool *);
bcachefs: fs-common.c -> namei.c name <-> inode, code for managing the relationships between inodes and dirents. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2025-03-20 10:53:52 -04:00
#endif /* _BCACHEFS_NAMEI_H */
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