+++ /dev/null
-/* 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"
-#include "two_state_shared_lock.h"
-
-#include <linux/seqlock.h>
-#include <linux/stat.h>
-
-struct bch_inode_info {
- struct inode v;
- struct list_head ei_vfs_inode_list;
- unsigned long ei_flags;
-
- struct mutex ei_update_lock;
- 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;
-
- 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)
-
-static inline int ptrcmp(void *l, void *r)
-{
- return cmp_int(l, r);
-}
-
-enum bch_inode_lock_op {
- INODE_PAGECACHE_BLOCK = (1U << 0),
- INODE_UPDATE_LOCK = (1U << 1),
-};
-
-#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_PAGECACHE_BLOCK) \
- bch2_pagecache_block_get(a[i]);\
- 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_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 bool inode_attr_changing(struct bch_inode_info *dir,
- struct bch_inode_info *inode,
- enum inode_opt_id id)
-{
- 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 bool inode_attrs_changing(struct bch_inode_info *dir,
- struct bch_inode_info *inode)
-{
- 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 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,
- 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 btree_trans *,
- struct bch_inode_info *,
- struct bch_inode_unpacked *, void *);
-
-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 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; }
-
-#endif /* NO_BCACHEFS_FS */
-
-#endif /* _BCACHEFS_FS_H */
projects / bcachefs-tools-debian / blobdiff