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793a06d984
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
210 lines
5.6 KiB
C
210 lines
5.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _BCACHEFS_FS_H
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#define _BCACHEFS_FS_H
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#include "inode.h"
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#include "opts.h"
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#include "str_hash.h"
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#include "quota_types.h"
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#include "two_state_shared_lock.h"
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#include <linux/seqlock.h>
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#include <linux/stat.h>
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struct bch_inode_info {
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struct inode v;
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struct list_head ei_vfs_inode_list;
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unsigned long ei_flags;
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struct mutex ei_update_lock;
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u64 ei_quota_reserved;
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unsigned long ei_last_dirtied;
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two_state_lock_t ei_pagecache_lock;
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struct mutex ei_quota_lock;
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struct bch_qid ei_qid;
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u32 ei_subvol;
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/*
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* When we've been doing nocow writes we'll need to issue flushes to the
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* underlying block devices
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*
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* XXX: a device may have had a flush issued by some other codepath. It
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* would be better to keep for each device a sequence number that's
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* incremented when we isusue a cache flush, and track here the sequence
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* number that needs flushing.
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*/
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struct bch_devs_mask ei_devs_need_flush;
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/* copy of inode in btree: */
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struct bch_inode_unpacked ei_inode;
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};
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#define bch2_pagecache_add_put(i) bch2_two_state_unlock(&i->ei_pagecache_lock, 0)
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#define bch2_pagecache_add_tryget(i) bch2_two_state_trylock(&i->ei_pagecache_lock, 0)
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#define bch2_pagecache_add_get(i) bch2_two_state_lock(&i->ei_pagecache_lock, 0)
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#define bch2_pagecache_block_put(i) bch2_two_state_unlock(&i->ei_pagecache_lock, 1)
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#define bch2_pagecache_block_get(i) bch2_two_state_lock(&i->ei_pagecache_lock, 1)
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static inline subvol_inum inode_inum(struct bch_inode_info *inode)
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{
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return (subvol_inum) {
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.subvol = inode->ei_subvol,
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.inum = inode->ei_inode.bi_inum,
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};
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}
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/*
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* Set if we've gotten a btree error for this inode, and thus the vfs inode and
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* btree inode may be inconsistent:
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*/
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#define EI_INODE_ERROR 0
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/*
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* Set in the inode is in a snapshot subvolume - we don't do quota accounting in
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* those:
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*/
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#define EI_INODE_SNAPSHOT 1
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#define to_bch_ei(_inode) \
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container_of_or_null(_inode, struct bch_inode_info, v)
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static inline int ptrcmp(void *l, void *r)
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{
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return cmp_int(l, r);
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}
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enum bch_inode_lock_op {
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INODE_LOCK = (1U << 0),
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INODE_PAGECACHE_BLOCK = (1U << 1),
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INODE_UPDATE_LOCK = (1U << 2),
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};
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#define bch2_lock_inodes(_locks, ...) \
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do { \
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struct bch_inode_info *a[] = { NULL, __VA_ARGS__ }; \
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unsigned i; \
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\
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bubble_sort(&a[1], ARRAY_SIZE(a) - 1, ptrcmp); \
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\
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for (i = 1; i < ARRAY_SIZE(a); i++) \
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if (a[i] != a[i - 1]) { \
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if ((_locks) & INODE_LOCK) \
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down_write_nested(&a[i]->v.i_rwsem, i); \
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if ((_locks) & INODE_PAGECACHE_BLOCK) \
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bch2_pagecache_block_get(a[i]);\
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if ((_locks) & INODE_UPDATE_LOCK) \
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mutex_lock_nested(&a[i]->ei_update_lock, i);\
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} \
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} while (0)
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#define bch2_unlock_inodes(_locks, ...) \
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do { \
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struct bch_inode_info *a[] = { NULL, __VA_ARGS__ }; \
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unsigned i; \
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\
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bubble_sort(&a[1], ARRAY_SIZE(a) - 1, ptrcmp); \
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\
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for (i = 1; i < ARRAY_SIZE(a); i++) \
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if (a[i] != a[i - 1]) { \
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if ((_locks) & INODE_LOCK) \
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up_write(&a[i]->v.i_rwsem); \
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if ((_locks) & INODE_PAGECACHE_BLOCK) \
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bch2_pagecache_block_put(a[i]);\
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if ((_locks) & INODE_UPDATE_LOCK) \
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mutex_unlock(&a[i]->ei_update_lock); \
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} \
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} while (0)
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static inline struct bch_inode_info *file_bch_inode(struct file *file)
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{
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return to_bch_ei(file_inode(file));
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}
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static inline bool inode_attr_changing(struct bch_inode_info *dir,
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struct bch_inode_info *inode,
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enum inode_opt_id id)
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{
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return !(inode->ei_inode.bi_fields_set & (1 << id)) &&
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bch2_inode_opt_get(&dir->ei_inode, id) !=
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bch2_inode_opt_get(&inode->ei_inode, id);
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}
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static inline bool inode_attrs_changing(struct bch_inode_info *dir,
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struct bch_inode_info *inode)
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{
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unsigned id;
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for (id = 0; id < Inode_opt_nr; id++)
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if (inode_attr_changing(dir, inode, id))
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return true;
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return false;
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}
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struct bch_inode_unpacked;
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#ifndef NO_BCACHEFS_FS
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struct bch_inode_info *
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__bch2_create(struct mnt_idmap *, struct bch_inode_info *,
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struct dentry *, umode_t, dev_t, subvol_inum, unsigned);
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int bch2_fs_quota_transfer(struct bch_fs *,
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struct bch_inode_info *,
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struct bch_qid,
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unsigned,
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enum quota_acct_mode);
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static inline int bch2_set_projid(struct bch_fs *c,
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struct bch_inode_info *inode,
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u32 projid)
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{
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struct bch_qid qid = inode->ei_qid;
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qid.q[QTYP_PRJ] = projid;
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return bch2_fs_quota_transfer(c, inode, qid,
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1 << QTYP_PRJ,
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KEY_TYPE_QUOTA_PREALLOC);
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}
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struct inode *bch2_vfs_inode_get(struct bch_fs *, subvol_inum);
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/* returns 0 if we want to do the update, or error is passed up */
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typedef int (*inode_set_fn)(struct btree_trans *,
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struct bch_inode_info *,
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struct bch_inode_unpacked *, void *);
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void bch2_inode_update_after_write(struct btree_trans *,
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struct bch_inode_info *,
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struct bch_inode_unpacked *,
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unsigned);
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int __must_check bch2_write_inode(struct bch_fs *, struct bch_inode_info *,
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inode_set_fn, void *, unsigned);
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int bch2_setattr_nonsize(struct mnt_idmap *,
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struct bch_inode_info *,
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struct iattr *);
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int __bch2_unlink(struct inode *, struct dentry *, bool);
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void bch2_evict_subvolume_inodes(struct bch_fs *, snapshot_id_list *);
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void bch2_vfs_exit(void);
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int bch2_vfs_init(void);
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#else
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#define bch2_inode_update_after_write(_trans, _inode, _inode_u, _fields) ({ do {} while (0); })
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static inline void bch2_evict_subvolume_inodes(struct bch_fs *c,
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snapshot_id_list *s) {}
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static inline void bch2_vfs_exit(void) {}
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static inline int bch2_vfs_init(void) { return 0; }
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#endif /* NO_BCACHEFS_FS */
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#endif /* _BCACHEFS_FS_H */
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