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author | Kent Overstreet <kent.overstreet@gmail.com> | 2017-03-16 22:18:50 -0800 |
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committer | Kent Overstreet <kent.overstreet@linux.dev> | 2023-10-22 17:08:07 -0400 |
commit | 1c6fdbd8f2465ddfb73a01ec620cbf3d14044e1a (patch) | |
tree | 9192de91a00908ee898bc331ac8b0544d6fc030a /fs/bcachefs/fs.h | |
parent | 0d29a833b7b1800bd2759bbc064b5ada4729caf5 (diff) | |
download | lwn-1c6fdbd8f2465ddfb73a01ec620cbf3d14044e1a.tar.gz lwn-1c6fdbd8f2465ddfb73a01ec620cbf3d14044e1a.zip |
bcachefs: Initial commit
Initially forked from drivers/md/bcache, bcachefs is a new copy-on-write
filesystem with every feature you could possibly want.
Website: https://bcachefs.org
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Diffstat (limited to 'fs/bcachefs/fs.h')
-rw-r--r-- | fs/bcachefs/fs.h | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/fs/bcachefs/fs.h b/fs/bcachefs/fs.h new file mode 100644 index 000000000000..e8dd566285fc --- /dev/null +++ b/fs/bcachefs/fs.h @@ -0,0 +1,99 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _BCACHEFS_FS_H +#define _BCACHEFS_FS_H + +#include "opts.h" +#include "str_hash.h" +#include "quota_types.h" + +#include <linux/seqlock.h> +#include <linux/stat.h> + +/* + * Two-state lock - can be taken for add or block - both states are shared, + * like read side of rwsem, but conflict with other state: + */ +struct pagecache_lock { + atomic_long_t v; + wait_queue_head_t wait; +}; + +static inline void pagecache_lock_init(struct pagecache_lock *lock) +{ + atomic_long_set(&lock->v, 0); + init_waitqueue_head(&lock->wait); +} + +void bch2_pagecache_add_put(struct pagecache_lock *); +void bch2_pagecache_add_get(struct pagecache_lock *); +void bch2_pagecache_block_put(struct pagecache_lock *); +void bch2_pagecache_block_get(struct pagecache_lock *); + +struct bch_inode_info { + struct inode v; + + struct mutex ei_update_lock; + u64 ei_journal_seq; + u64 ei_quota_reserved; + unsigned long ei_last_dirtied; + struct pagecache_lock ei_pagecache_lock; + + struct mutex ei_quota_lock; + struct bch_qid ei_qid; + + struct bch_hash_info ei_str_hash; + + /* copy of inode in btree: */ + struct bch_inode_unpacked ei_inode; +}; + +#define to_bch_ei(_inode) \ + container_of_or_null(_inode, struct bch_inode_info, v) + +static inline struct bch_inode_info *file_bch_inode(struct file *file) +{ + return to_bch_ei(file_inode(file)); +} + +static inline u8 mode_to_type(umode_t mode) +{ + return (mode >> 12) & 15; +} + +static inline unsigned nlink_bias(umode_t mode) +{ + return S_ISDIR(mode) ? 2 : 1; +} + +struct bch_inode_unpacked; + +#ifndef NO_BCACHEFS_FS + +/* returns 0 if we want to do the update, or error is passed up */ +typedef int (*inode_set_fn)(struct bch_inode_info *, + struct bch_inode_unpacked *, void *); + +void bch2_inode_update_after_write(struct bch_fs *, + struct bch_inode_info *, + struct bch_inode_unpacked *, + unsigned); +int __must_check bch2_write_inode_trans(struct btree_trans *, + struct bch_inode_info *, + struct bch_inode_unpacked *, + inode_set_fn, void *); +int __must_check __bch2_write_inode(struct bch_fs *, struct bch_inode_info *, + inode_set_fn, void *, unsigned); +int __must_check bch2_write_inode(struct bch_fs *, + struct bch_inode_info *); + +void bch2_vfs_exit(void); +int bch2_vfs_init(void); + +#else + +static inline void bch2_vfs_exit(void) {} +static inline int bch2_vfs_init(void) { return 0; } + +#endif /* NO_BCACHEFS_FS */ + +#endif /* _BCACHEFS_FS_H */ |