X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libbcachefs%2Ffs.h;h=27aacd7e28646544e3983fb0935580744b0400c6;hb=837b76ce9507fa2a69ddeecc1e1b6d3fabb08227;hp=dd0bd4ef6c7ea988f50b1ea512a455ad024eedf7;hpb=4de98a2712764bceb9e0f67b1ac2f2c7862feb77;p=bcachefs-tools-debian diff --git a/libbcachefs/fs.h b/libbcachefs/fs.h index dd0bd4e..27aacd7 100644 --- a/libbcachefs/fs.h +++ b/libbcachefs/fs.h @@ -1,6 +1,8 @@ +/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _BCACHEFS_FS_H #define _BCACHEFS_FS_H +#include "inode.h" #include "opts.h" #include "str_hash.h" #include "quota_types.h" @@ -8,56 +10,190 @@ #include #include +/* + * 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 *); +bool bch2_pagecache_add_tryget(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; + unsigned long ei_flags; 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; + u32 ei_subvol; /* copy of inode in btree: */ struct bch_inode_unpacked ei_inode; }; +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 + #define to_bch_ei(_inode) \ container_of_or_null(_inode, struct bch_inode_info, v) +static inline int ptrcmp(void *l, void *r) +{ + return cmp_int(l, r); +} + +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); \ + \ + for (i = 1; i < ARRAY_SIZE(a); i++) \ + if (a[i] != a[i - 1]) { \ + if ((_locks) & INODE_LOCK) \ + down_write_nested(&a[i]->v.i_rwsem, i); \ + if ((_locks) & INODE_PAGECACHE_BLOCK) \ + bch2_pagecache_block_get(&a[i]->ei_pagecache_lock);\ + if ((_locks) & INODE_UPDATE_LOCK) \ + mutex_lock_nested(&a[i]->ei_update_lock, i);\ + } \ +} while (0) + +#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]->ei_pagecache_lock);\ + 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) +static inline bool inode_attr_changing(struct bch_inode_info *dir, + struct bch_inode_info *inode, + enum inode_opt_id id) { - return (mode >> 12) & 15; + return !(inode->ei_inode.bi_fields_set & (1 << id)) && + bch2_inode_opt_get(&dir->ei_inode, id) != + bch2_inode_opt_get(&inode->ei_inode, id); } -static inline unsigned nlink_bias(umode_t mode) +static inline bool inode_attrs_changing(struct bch_inode_info *dir, + struct bch_inode_info *inode) { - return S_ISDIR(mode) ? 2 : 1; + unsigned id; + + for (id = 0; id < Inode_opt_nr; id++) + if (inode_attr_changing(dir, inode, id)) + return true; + + return false; } struct bch_inode_unpacked; #ifndef NO_BCACHEFS_FS +struct bch_inode_info * +__bch2_create(struct user_namespace *, 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, + unsigned, + enum quota_acct_mode); + +static inline int bch2_set_projid(struct bch_fs *c, + struct bch_inode_info *inode, + u32 projid) +{ + struct bch_qid qid = inode->ei_qid; + + qid.q[QTYP_PRJ] = projid; + + return bch2_fs_quota_transfer(c, inode, qid, + 1 << QTYP_PRJ, + KEY_TYPE_QUOTA_PREALLOC); +} + +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 *); -int __must_check __bch2_write_inode(struct bch_fs *, struct bch_inode_info *, - inode_set_fn, void *); -int __must_check bch2_write_inode(struct bch_fs *, - struct bch_inode_info *); +void bch2_inode_update_after_write(struct btree_trans *, + struct bch_inode_info *, + struct bch_inode_unpacked *, + unsigned); +int __must_check bch2_write_inode(struct bch_fs *, struct bch_inode_info *, + inode_set_fn, void *, unsigned); + +int bch2_setattr_nonsize(struct user_namespace *, + struct bch_inode_info *, + struct iattr *); +int __bch2_unlink(struct inode *, struct dentry *, bool); + +void bch2_evict_subvolume_inodes(struct bch_fs *, struct snapshot_id_list *); void bch2_vfs_exit(void); int bch2_vfs_init(void); #else +static inline void bch2_evict_subvolume_inodes(struct bch_fs *c, + struct snapshot_id_list *s) {} static inline void bch2_vfs_exit(void) {} static inline int bch2_vfs_init(void) { return 0; }