X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libbcachefs%2Ffs.h;h=6170d214d6489720791edd25a3811c2274baa64b;hb=bafc817a3f33adbf2ff701bf8f6757aedb0a1458;hp=374f7fd1ffbf980852e62a01daa26b6cbcc7c96d;hpb=b485aae1bac95e3b5be235116e2bc43da85906c5;p=bcachefs-tools-debian diff --git a/libbcachefs/fs.h b/libbcachefs/fs.h index 374f7fd..6170d21 100644 --- a/libbcachefs/fs.h +++ b/libbcachefs/fs.h @@ -1,3 +1,4 @@ +/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _BCACHEFS_FS_H #define _BCACHEFS_FS_H @@ -5,28 +6,68 @@ #include "opts.h" #include "str_hash.h" #include "quota_types.h" +#include "two_state_shared_lock.h" #include #include struct bch_inode_info { struct inode v; + struct list_head ei_vfs_inode_list; + unsigned long ei_flags; struct mutex ei_update_lock; - struct deferred_update *ei_inode_update; - u64 ei_journal_seq; u64 ei_quota_reserved; unsigned long ei_last_dirtied; + two_state_lock_t ei_pagecache_lock; struct mutex ei_quota_lock; struct bch_qid ei_qid; - struct bch_hash_info ei_str_hash; + u32 ei_subvol; + + /* + * When we've been doing nocow writes we'll need to issue flushes to the + * underlying block devices + * + * XXX: a device may have had a flush issued by some other codepath. It + * would be better to keep for each device a sequence number that's + * incremented when we isusue a cache flush, and track here the sequence + * number that needs flushing. + */ + struct bch_devs_mask ei_devs_need_flush; /* copy of inode in btree: */ struct bch_inode_unpacked ei_inode; }; +#define bch2_pagecache_add_put(i) bch2_two_state_unlock(&i->ei_pagecache_lock, 0) +#define bch2_pagecache_add_tryget(i) bch2_two_state_trylock(&i->ei_pagecache_lock, 0) +#define bch2_pagecache_add_get(i) bch2_two_state_lock(&i->ei_pagecache_lock, 0) + +#define bch2_pagecache_block_put(i) bch2_two_state_unlock(&i->ei_pagecache_lock, 1) +#define bch2_pagecache_block_get(i) bch2_two_state_lock(&i->ei_pagecache_lock, 1) + +static inline subvol_inum inode_inum(struct bch_inode_info *inode) +{ + return (subvol_inum) { + .subvol = inode->ei_subvol, + .inum = inode->ei_inode.bi_inum, + }; +} + +/* + * Set if we've gotten a btree error for this inode, and thus the vfs inode and + * btree inode may be inconsistent: + */ +#define EI_INODE_ERROR 0 + +/* + * Set in the inode is in a snapshot subvolume - we don't do quota accounting in + * those: + */ +#define EI_INODE_SNAPSHOT 1 + #define to_bch_ei(_inode) \ container_of_or_null(_inode, struct bch_inode_info, v) @@ -35,40 +76,53 @@ static inline int ptrcmp(void *l, void *r) return cmp_int(l, r); } -#define __bch2_lock_inodes(_lock, ...) \ +enum bch_inode_lock_op { + INODE_LOCK = (1U << 0), + INODE_PAGECACHE_BLOCK = (1U << 1), + INODE_UPDATE_LOCK = (1U << 2), +}; + +#define bch2_lock_inodes(_locks, ...) \ do { \ struct bch_inode_info *a[] = { NULL, __VA_ARGS__ }; \ unsigned i; \ \ - bubble_sort(&a[1], ARRAY_SIZE(a) - 1 , ptrcmp); \ + bubble_sort(&a[1], ARRAY_SIZE(a) - 1, ptrcmp); \ \ - for (i = ARRAY_SIZE(a) - 1; a[i]; --i) \ + for (i = 1; i < ARRAY_SIZE(a); i++) \ if (a[i] != a[i - 1]) { \ - if (_lock) \ + if ((_locks) & INODE_LOCK) \ + down_write_nested(&a[i]->v.i_rwsem, i); \ + if ((_locks) & INODE_PAGECACHE_BLOCK) \ + bch2_pagecache_block_get(a[i]);\ + if ((_locks) & INODE_UPDATE_LOCK) \ mutex_lock_nested(&a[i]->ei_update_lock, i);\ - else \ - mutex_unlock(&a[i]->ei_update_lock); \ } \ } while (0) -#define bch2_lock_inodes(...) __bch2_lock_inodes(true, __VA_ARGS__) -#define bch2_unlock_inodes(...) __bch2_lock_inodes(false, __VA_ARGS__) +#define bch2_unlock_inodes(_locks, ...) \ +do { \ + struct bch_inode_info *a[] = { NULL, __VA_ARGS__ }; \ + unsigned i; \ + \ + bubble_sort(&a[1], ARRAY_SIZE(a) - 1, ptrcmp); \ + \ + for (i = 1; i < ARRAY_SIZE(a); i++) \ + if (a[i] != a[i - 1]) { \ + if ((_locks) & INODE_LOCK) \ + up_write(&a[i]->v.i_rwsem); \ + if ((_locks) & INODE_PAGECACHE_BLOCK) \ + bch2_pagecache_block_put(a[i]);\ + if ((_locks) & INODE_UPDATE_LOCK) \ + mutex_unlock(&a[i]->ei_update_lock); \ + } \ +} while (0) 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; -} - static inline bool inode_attr_changing(struct bch_inode_info *dir, struct bch_inode_info *inode, enum inode_opt_id id) @@ -94,6 +148,10 @@ struct bch_inode_unpacked; #ifndef NO_BCACHEFS_FS +struct bch_inode_info * +__bch2_create(struct mnt_idmap *, struct bch_inode_info *, + struct dentry *, umode_t, dev_t, subvol_inum, unsigned); + int bch2_fs_quota_transfer(struct bch_fs *, struct bch_inode_info *, struct bch_qid, @@ -113,32 +171,35 @@ static inline int bch2_set_projid(struct bch_fs *c, KEY_TYPE_QUOTA_PREALLOC); } -struct inode *bch2_vfs_inode_get(struct bch_fs *, u64); +struct inode *bch2_vfs_inode_get(struct bch_fs *, subvol_inum); /* 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 *, +void bch2_inode_update_after_write(struct btree_trans *, 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 bch2_reinherit_attrs_fn(struct bch_inode_info *, - struct bch_inode_unpacked *, - void *); +int bch2_setattr_nonsize(struct mnt_idmap *, + struct bch_inode_info *, + struct iattr *); +int __bch2_unlink(struct inode *, struct dentry *, bool); + +void bch2_evict_subvolume_inodes(struct bch_fs *, snapshot_id_list *); void bch2_vfs_exit(void); int bch2_vfs_init(void); #else +#define bch2_inode_update_after_write(_trans, _inode, _inode_u, _fields) do {} while (0) + +static inline void bch2_evict_subvolume_inodes(struct bch_fs *c, + snapshot_id_list *s) {} static inline void bch2_vfs_exit(void) {} static inline int bch2_vfs_init(void) { return 0; }