fs/bcachefs/inode.h - linux - Git at Google

 /* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _BCACHEFS_INODE_H
 #define _BCACHEFS_INODE_H

 #include "bkey.h"
 #include "bkey_methods.h"
 #include "opts.h"

 enum bch_validate_flags;
 extern const char * const bch2_inode_opts[];

 int bch2_inode_invalid(struct bch_fs *, struct bkey_s_c,
 		       enum bch_validate_flags, struct printbuf *);
 int bch2_inode_v2_invalid(struct bch_fs *, struct bkey_s_c,
 			  enum bch_validate_flags, struct printbuf *);
 int bch2_inode_v3_invalid(struct bch_fs *, struct bkey_s_c,
 			  enum bch_validate_flags, struct printbuf *);
 void bch2_inode_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);

 int bch2_trigger_inode(struct btree_trans *, enum btree_id, unsigned,
 		       struct bkey_s_c, struct bkey_s,
 		       enum btree_iter_update_trigger_flags);

 #define bch2_bkey_ops_inode ((struct bkey_ops) {	\
 	.key_invalid	= bch2_inode_invalid,		\
 	.val_to_text	= bch2_inode_to_text,		\
 	.trigger	= bch2_trigger_inode,		\
 	.min_val_size	= 16,				\
 })

 #define bch2_bkey_ops_inode_v2 ((struct bkey_ops) {	\
 	.key_invalid	= bch2_inode_v2_invalid,	\
 	.val_to_text	= bch2_inode_to_text,		\
 	.trigger	= bch2_trigger_inode,		\
 	.min_val_size	= 32,				\
 })

 #define bch2_bkey_ops_inode_v3 ((struct bkey_ops) {	\
 	.key_invalid	= bch2_inode_v3_invalid,	\
 	.val_to_text	= bch2_inode_to_text,		\
 	.trigger	= bch2_trigger_inode,		\
 	.min_val_size	= 48,				\
 })

 static inline bool bkey_is_inode(const struct bkey *k)
 {
 	return  k->type == KEY_TYPE_inode ||
 		k->type == KEY_TYPE_inode_v2 ||
 		k->type == KEY_TYPE_inode_v3;
 }

 int bch2_inode_generation_invalid(struct bch_fs *, struct bkey_s_c,
 				  enum bch_validate_flags, struct printbuf *);
 void bch2_inode_generation_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);

 #define bch2_bkey_ops_inode_generation ((struct bkey_ops) {	\
 	.key_invalid	= bch2_inode_generation_invalid,	\
 	.val_to_text	= bch2_inode_generation_to_text,	\
 	.min_val_size	= 8,					\
 })

 #if 0
 typedef struct {
 	u64			lo;
 	u32			hi;
 } __packed __aligned(4) u96;
 #endif
 typedef u64 u96;

 struct bch_inode_unpacked {
 	u64			bi_inum;
 	u64			bi_journal_seq;
 	__le64			bi_hash_seed;
 	u64			bi_size;
 	u64			bi_sectors;
 	u64			bi_version;
 	u32			bi_flags;
 	u16			bi_mode;

 #define x(_name, _bits)	u##_bits _name;
 	BCH_INODE_FIELDS_v3()
 #undef  x
 };

 struct bkey_inode_buf {
 	struct bkey_i_inode_v3	inode;

 #define x(_name, _bits)		+ 8 + _bits / 8
 	u8		_pad[0 + BCH_INODE_FIELDS_v3()];
 #undef  x
 } __packed __aligned(8);

 void bch2_inode_pack(struct bkey_inode_buf *, const struct bch_inode_unpacked *);
 int bch2_inode_unpack(struct bkey_s_c, struct bch_inode_unpacked *);
 struct bkey_i *bch2_inode_to_v3(struct btree_trans *, struct bkey_i *);

 void bch2_inode_unpacked_to_text(struct printbuf *, struct bch_inode_unpacked *);

 int bch2_inode_peek_nowarn(struct btree_trans *, struct btree_iter *,
 		    struct bch_inode_unpacked *, subvol_inum, unsigned);
 int bch2_inode_peek(struct btree_trans *, struct btree_iter *,
 		    struct bch_inode_unpacked *, subvol_inum, unsigned);

 int bch2_inode_write_flags(struct btree_trans *, struct btree_iter *,
 		     struct bch_inode_unpacked *, enum btree_iter_update_trigger_flags);

 static inline int bch2_inode_write(struct btree_trans *trans,
 		     struct btree_iter *iter,
 		     struct bch_inode_unpacked *inode)
 {
 	return bch2_inode_write_flags(trans, iter, inode, 0);
 }

 int __bch2_fsck_write_inode(struct btree_trans *, struct bch_inode_unpacked *, u32);
 int bch2_fsck_write_inode(struct btree_trans *, struct bch_inode_unpacked *, u32);

 void bch2_inode_init_early(struct bch_fs *,
 			   struct bch_inode_unpacked *);
 void bch2_inode_init_late(struct bch_inode_unpacked *, u64,
 			  uid_t, gid_t, umode_t, dev_t,
 			  struct bch_inode_unpacked *);
 void bch2_inode_init(struct bch_fs *, struct bch_inode_unpacked *,
 		     uid_t, gid_t, umode_t, dev_t,
 		     struct bch_inode_unpacked *);

 int bch2_inode_create(struct btree_trans *, struct btree_iter *,
 		      struct bch_inode_unpacked *, u32, u64);

 int bch2_inode_rm(struct bch_fs *, subvol_inum);

 int bch2_inode_find_by_inum_nowarn_trans(struct btree_trans *,
 				  subvol_inum,
 				  struct bch_inode_unpacked *);
 int bch2_inode_find_by_inum_trans(struct btree_trans *, subvol_inum,
 				  struct bch_inode_unpacked *);
 int bch2_inode_find_by_inum(struct bch_fs *, subvol_inum,
 			    struct bch_inode_unpacked *);

 #define inode_opt_get(_c, _inode, _name)			\
 	((_inode)->bi_##_name ? (_inode)->bi_##_name - 1 : (_c)->opts._name)

 static inline void bch2_inode_opt_set(struct bch_inode_unpacked *inode,
 				      enum inode_opt_id id, u64 v)
 {
 	switch (id) {
 #define x(_name, ...)							\
 	case Inode_opt_##_name:						\
 		inode->bi_##_name = v;					\
 		break;
 	BCH_INODE_OPTS()
 #undef x
 	default:
 		BUG();
 	}
 }

 static inline u64 bch2_inode_opt_get(struct bch_inode_unpacked *inode,
 				     enum inode_opt_id id)
 {
 	switch (id) {
 #define x(_name, ...)							\
 	case Inode_opt_##_name:						\
 		return inode->bi_##_name;
 	BCH_INODE_OPTS()
 #undef x
 	default:
 		BUG();
 	}
 }

 static inline u8 mode_to_type(umode_t mode)
 {
 	return (mode >> 12) & 15;
 }

 static inline u8 inode_d_type(struct bch_inode_unpacked *inode)
 {
 	return inode->bi_subvol ? DT_SUBVOL : mode_to_type(inode->bi_mode);
 }

 static inline u32 bch2_inode_flags(struct bkey_s_c k)
 {
 	switch (k.k->type) {
 	case KEY_TYPE_inode:
 		return le32_to_cpu(bkey_s_c_to_inode(k).v->bi_flags);
 	case KEY_TYPE_inode_v2:
 		return le64_to_cpu(bkey_s_c_to_inode_v2(k).v->bi_flags);
 	case KEY_TYPE_inode_v3:
 		return le64_to_cpu(bkey_s_c_to_inode_v3(k).v->bi_flags);
 	default:
 		return 0;
 	}
 }

 /* i_nlink: */

 static inline unsigned nlink_bias(umode_t mode)
 {
 	return S_ISDIR(mode) ? 2 : 1;
 }

 static inline unsigned bch2_inode_nlink_get(struct bch_inode_unpacked *bi)
 {
 	return bi->bi_flags & BCH_INODE_unlinked
 		  ? 0
 		  : bi->bi_nlink + nlink_bias(bi->bi_mode);
 }

 static inline void bch2_inode_nlink_set(struct bch_inode_unpacked *bi,
 					unsigned nlink)
 {
 	if (nlink) {
 		bi->bi_nlink = nlink - nlink_bias(bi->bi_mode);
 		bi->bi_flags &= ~BCH_INODE_unlinked;
 	} else {
 		bi->bi_nlink = 0;
 		bi->bi_flags |= BCH_INODE_unlinked;
 	}
 }

 int bch2_inode_nlink_inc(struct bch_inode_unpacked *);
 void bch2_inode_nlink_dec(struct btree_trans *, struct bch_inode_unpacked *);

 static inline bool bch2_inode_should_have_bp(struct bch_inode_unpacked *inode)
 {
 	bool inode_has_bp = inode->bi_dir || inode->bi_dir_offset;

 	return S_ISDIR(inode->bi_mode) ||
 		(!inode->bi_nlink && inode_has_bp);
 }

 struct bch_opts bch2_inode_opts_to_opts(struct bch_inode_unpacked *);
 void bch2_inode_opts_get(struct bch_io_opts *, struct bch_fs *,
 			 struct bch_inode_unpacked *);
 int bch2_inum_opts_get(struct btree_trans*, subvol_inum, struct bch_io_opts *);

 int bch2_inode_rm_snapshot(struct btree_trans *, u64, u32);
 int bch2_delete_dead_inodes(struct bch_fs *);

 #endif /* _BCACHEFS_INODE_H */
	/* SPDX-License-Identifier: GPL-2.0 */
	#ifndef _BCACHEFS_INODE_H
	#define _BCACHEFS_INODE_H

	#include "bkey.h"
	#include "bkey_methods.h"
	#include "opts.h"

	enum bch_validate_flags;
	extern const char * const bch2_inode_opts[];

	int bch2_inode_invalid(struct bch_fs *, struct bkey_s_c,
	enum bch_validate_flags, struct printbuf *);
	int bch2_inode_v2_invalid(struct bch_fs *, struct bkey_s_c,
	enum bch_validate_flags, struct printbuf *);
	int bch2_inode_v3_invalid(struct bch_fs *, struct bkey_s_c,
	enum bch_validate_flags, struct printbuf *);
	void bch2_inode_to_text(struct printbuf , struct bch_fs , struct bkey_s_c);

	int bch2_trigger_inode(struct btree_trans *, enum btree_id, unsigned,
	struct bkey_s_c, struct bkey_s,
	enum btree_iter_update_trigger_flags);

	#define bch2_bkey_ops_inode ((struct bkey_ops) { \
	.key_invalid = bch2_inode_invalid, \
	.val_to_text = bch2_inode_to_text, \
	.trigger = bch2_trigger_inode, \
	.min_val_size = 16, \
	})

	#define bch2_bkey_ops_inode_v2 ((struct bkey_ops) { \
	.key_invalid = bch2_inode_v2_invalid, \
	.val_to_text = bch2_inode_to_text, \
	.trigger = bch2_trigger_inode, \
	.min_val_size = 32, \
	})

	#define bch2_bkey_ops_inode_v3 ((struct bkey_ops) { \
	.key_invalid = bch2_inode_v3_invalid, \
	.val_to_text = bch2_inode_to_text, \
	.trigger = bch2_trigger_inode, \
	.min_val_size = 48, \
	})

	static inline bool bkey_is_inode(const struct bkey *k)
	{
	return k->type == KEY_TYPE_inode \|\|
	k->type == KEY_TYPE_inode_v2 \|\|
	k->type == KEY_TYPE_inode_v3;
	}

	int bch2_inode_generation_invalid(struct bch_fs *, struct bkey_s_c,
	enum bch_validate_flags, struct printbuf *);
	void bch2_inode_generation_to_text(struct printbuf , struct bch_fs , struct bkey_s_c);

	#define bch2_bkey_ops_inode_generation ((struct bkey_ops) { \
	.key_invalid = bch2_inode_generation_invalid, \
	.val_to_text = bch2_inode_generation_to_text, \
	.min_val_size = 8, \
	})

	#if 0
	typedef struct {
	u64 lo;
	u32 hi;
	} __packed __aligned(4) u96;
	#endif
	typedef u64 u96;

	struct bch_inode_unpacked {
	u64 bi_inum;
	u64 bi_journal_seq;
	__le64 bi_hash_seed;
	u64 bi_size;
	u64 bi_sectors;
	u64 bi_version;
	u32 bi_flags;
	u16 bi_mode;

	#define x(_name, _bits) u##_bits _name;
	BCH_INODE_FIELDS_v3()
	#undef x
	};

	struct bkey_inode_buf {
	struct bkey_i_inode_v3 inode;

	#define x(_name, _bits) + 8 + _bits / 8
	u8 _pad[0 + BCH_INODE_FIELDS_v3()];
	#undef x
	} __packed __aligned(8);

	void bch2_inode_pack(struct bkey_inode_buf , const struct bch_inode_unpacked );
	int bch2_inode_unpack(struct bkey_s_c, struct bch_inode_unpacked *);
	struct bkey_i bch2_inode_to_v3(struct btree_trans , struct bkey_i *);

	void bch2_inode_unpacked_to_text(struct printbuf , struct bch_inode_unpacked );

	int bch2_inode_peek_nowarn(struct btree_trans , struct btree_iter ,
	struct bch_inode_unpacked *, subvol_inum, unsigned);
	int bch2_inode_peek(struct btree_trans , struct btree_iter ,
	struct bch_inode_unpacked *, subvol_inum, unsigned);

	int bch2_inode_write_flags(struct btree_trans , struct btree_iter ,
	struct bch_inode_unpacked *, enum btree_iter_update_trigger_flags);

	static inline int bch2_inode_write(struct btree_trans *trans,
	struct btree_iter *iter,
	struct bch_inode_unpacked *inode)
	{
	return bch2_inode_write_flags(trans, iter, inode, 0);
	}

	int __bch2_fsck_write_inode(struct btree_trans , struct bch_inode_unpacked , u32);
	int bch2_fsck_write_inode(struct btree_trans , struct bch_inode_unpacked , u32);

	void bch2_inode_init_early(struct bch_fs *,
	struct bch_inode_unpacked *);
	void bch2_inode_init_late(struct bch_inode_unpacked *, u64,
	uid_t, gid_t, umode_t, dev_t,
	struct bch_inode_unpacked *);
	void bch2_inode_init(struct bch_fs , struct bch_inode_unpacked ,
	uid_t, gid_t, umode_t, dev_t,
	struct bch_inode_unpacked *);

	int bch2_inode_create(struct btree_trans , struct btree_iter ,
	struct bch_inode_unpacked *, u32, u64);

	int bch2_inode_rm(struct bch_fs *, subvol_inum);

	int bch2_inode_find_by_inum_nowarn_trans(struct btree_trans *,
	subvol_inum,
	struct bch_inode_unpacked *);
	int bch2_inode_find_by_inum_trans(struct btree_trans *, subvol_inum,
	struct bch_inode_unpacked *);
	int bch2_inode_find_by_inum(struct bch_fs *, subvol_inum,
	struct bch_inode_unpacked *);

	#define inode_opt_get(_c, _inode, _name) \
	((_inode)->bi_##_name ? (_inode)->bi_##_name - 1 : (_c)->opts._name)

	static inline void bch2_inode_opt_set(struct bch_inode_unpacked *inode,
	enum inode_opt_id id, u64 v)
	{
	switch (id) {
	#define x(_name, ...) \
	case Inode_opt_##_name: \
	inode->bi_##_name = v; \
	break;
	BCH_INODE_OPTS()
	#undef x
	default:
	BUG();
	}
	}

	static inline u64 bch2_inode_opt_get(struct bch_inode_unpacked *inode,
	enum inode_opt_id id)
	{
	switch (id) {
	#define x(_name, ...) \
	case Inode_opt_##_name: \
	return inode->bi_##_name;
	BCH_INODE_OPTS()
	#undef x
	default:
	BUG();
	}
	}

	static inline u8 mode_to_type(umode_t mode)
	{
	return (mode >> 12) & 15;
	}

	static inline u8 inode_d_type(struct bch_inode_unpacked *inode)
	{
	return inode->bi_subvol ? DT_SUBVOL : mode_to_type(inode->bi_mode);
	}

	static inline u32 bch2_inode_flags(struct bkey_s_c k)
	{
	switch (k.k->type) {
	case KEY_TYPE_inode:
	return le32_to_cpu(bkey_s_c_to_inode(k).v->bi_flags);
	case KEY_TYPE_inode_v2:
	return le64_to_cpu(bkey_s_c_to_inode_v2(k).v->bi_flags);
	case KEY_TYPE_inode_v3:
	return le64_to_cpu(bkey_s_c_to_inode_v3(k).v->bi_flags);
	default:
	return 0;
	}
	}

	/* i_nlink: */

	static inline unsigned nlink_bias(umode_t mode)
	{
	return S_ISDIR(mode) ? 2 : 1;
	}

	static inline unsigned bch2_inode_nlink_get(struct bch_inode_unpacked *bi)
	{
	return bi->bi_flags & BCH_INODE_unlinked
	? 0
	: bi->bi_nlink + nlink_bias(bi->bi_mode);
	}

	static inline void bch2_inode_nlink_set(struct bch_inode_unpacked *bi,
	unsigned nlink)
	{
	if (nlink) {
	bi->bi_nlink = nlink - nlink_bias(bi->bi_mode);
	bi->bi_flags &= ~BCH_INODE_unlinked;
	} else {
	bi->bi_nlink = 0;
	bi->bi_flags \|= BCH_INODE_unlinked;
	}
	}

	int bch2_inode_nlink_inc(struct bch_inode_unpacked *);
	void bch2_inode_nlink_dec(struct btree_trans , struct bch_inode_unpacked );

	static inline bool bch2_inode_should_have_bp(struct bch_inode_unpacked *inode)
	{
	bool inode_has_bp = inode->bi_dir \|\| inode->bi_dir_offset;

	return S_ISDIR(inode->bi_mode) \|\|
	(!inode->bi_nlink && inode_has_bp);
	}

	struct bch_opts bch2_inode_opts_to_opts(struct bch_inode_unpacked *);
	void bch2_inode_opts_get(struct bch_io_opts , struct bch_fs ,
	struct bch_inode_unpacked *);
	int bch2_inum_opts_get(struct btree_trans, subvol_inum, struct bch_io_opts );

	int bch2_inode_rm_snapshot(struct btree_trans *, u64, u32);
	int bch2_delete_dead_inodes(struct bch_fs *);

	#endif /* _BCACHEFS_INODE_H */