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https://github.com/torvalds/linux
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![Kent Overstreet](/assets/img/avatar_default.png)
This pulls the non vfs specific parts of truncate and finsert/fcollapse out of fs-io.c, and moves them to io_misc.c. This is prep work for logging these operations, to make them atomic in the event of a crash. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
185 lines
4.8 KiB
C
185 lines
4.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _BCACHEFS_FS_IO_H
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#define _BCACHEFS_FS_IO_H
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#ifndef NO_BCACHEFS_FS
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#include "buckets.h"
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#include "fs.h"
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#include "io_write_types.h"
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#include "quota.h"
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#include <linux/uio.h>
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struct folio_vec {
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struct folio *fv_folio;
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size_t fv_offset;
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size_t fv_len;
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};
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static inline struct folio_vec biovec_to_foliovec(struct bio_vec bv)
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{
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struct folio *folio = page_folio(bv.bv_page);
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size_t offset = (folio_page_idx(folio, bv.bv_page) << PAGE_SHIFT) +
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bv.bv_offset;
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size_t len = min_t(size_t, folio_size(folio) - offset, bv.bv_len);
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return (struct folio_vec) {
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.fv_folio = folio,
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.fv_offset = offset,
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.fv_len = len,
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};
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}
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static inline struct folio_vec bio_iter_iovec_folio(struct bio *bio,
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struct bvec_iter iter)
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{
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return biovec_to_foliovec(bio_iter_iovec(bio, iter));
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}
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#define __bio_for_each_folio(bvl, bio, iter, start) \
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for (iter = (start); \
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(iter).bi_size && \
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((bvl = bio_iter_iovec_folio((bio), (iter))), 1); \
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bio_advance_iter_single((bio), &(iter), (bvl).fv_len))
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/**
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* bio_for_each_folio - iterate over folios within a bio
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*
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* Like other non-_all versions, this iterates over what bio->bi_iter currently
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* points to. This version is for drivers, where the bio may have previously
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* been split or cloned.
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*/
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#define bio_for_each_folio(bvl, bio, iter) \
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__bio_for_each_folio(bvl, bio, iter, (bio)->bi_iter)
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struct quota_res {
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u64 sectors;
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};
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#ifdef CONFIG_BCACHEFS_QUOTA
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static inline void __bch2_quota_reservation_put(struct bch_fs *c,
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struct bch_inode_info *inode,
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struct quota_res *res)
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{
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BUG_ON(res->sectors > inode->ei_quota_reserved);
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bch2_quota_acct(c, inode->ei_qid, Q_SPC,
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-((s64) res->sectors), KEY_TYPE_QUOTA_PREALLOC);
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inode->ei_quota_reserved -= res->sectors;
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res->sectors = 0;
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}
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static inline void bch2_quota_reservation_put(struct bch_fs *c,
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struct bch_inode_info *inode,
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struct quota_res *res)
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{
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if (res->sectors) {
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mutex_lock(&inode->ei_quota_lock);
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__bch2_quota_reservation_put(c, inode, res);
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mutex_unlock(&inode->ei_quota_lock);
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}
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}
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static inline int bch2_quota_reservation_add(struct bch_fs *c,
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struct bch_inode_info *inode,
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struct quota_res *res,
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u64 sectors,
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bool check_enospc)
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{
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int ret;
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if (test_bit(EI_INODE_SNAPSHOT, &inode->ei_flags))
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return 0;
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mutex_lock(&inode->ei_quota_lock);
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ret = bch2_quota_acct(c, inode->ei_qid, Q_SPC, sectors,
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check_enospc ? KEY_TYPE_QUOTA_PREALLOC : KEY_TYPE_QUOTA_NOCHECK);
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if (likely(!ret)) {
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inode->ei_quota_reserved += sectors;
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res->sectors += sectors;
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}
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mutex_unlock(&inode->ei_quota_lock);
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return ret;
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}
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#else
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static inline void __bch2_quota_reservation_put(struct bch_fs *c,
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struct bch_inode_info *inode,
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struct quota_res *res) {}
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static inline void bch2_quota_reservation_put(struct bch_fs *c,
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struct bch_inode_info *inode,
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struct quota_res *res) {}
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static inline int bch2_quota_reservation_add(struct bch_fs *c,
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struct bch_inode_info *inode,
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struct quota_res *res,
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unsigned sectors,
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bool check_enospc)
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{
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return 0;
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}
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#endif
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void __bch2_i_sectors_acct(struct bch_fs *, struct bch_inode_info *,
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struct quota_res *, s64);
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static inline void bch2_i_sectors_acct(struct bch_fs *c, struct bch_inode_info *inode,
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struct quota_res *quota_res, s64 sectors)
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{
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if (sectors) {
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mutex_lock(&inode->ei_quota_lock);
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__bch2_i_sectors_acct(c, inode, quota_res, sectors);
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mutex_unlock(&inode->ei_quota_lock);
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}
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}
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static inline struct address_space *faults_disabled_mapping(void)
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{
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return (void *) (((unsigned long) current->faults_disabled_mapping) & ~1UL);
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}
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static inline void set_fdm_dropped_locks(void)
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{
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current->faults_disabled_mapping =
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(void *) (((unsigned long) current->faults_disabled_mapping)|1);
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}
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static inline bool fdm_dropped_locks(void)
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{
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return ((unsigned long) current->faults_disabled_mapping) & 1;
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}
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void bch2_inode_flush_nocow_writes_async(struct bch_fs *,
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struct bch_inode_info *, struct closure *);
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int __must_check bch2_write_inode_size(struct bch_fs *,
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struct bch_inode_info *,
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loff_t, unsigned);
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int bch2_fsync(struct file *, loff_t, loff_t, int);
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int bchfs_truncate(struct mnt_idmap *,
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struct bch_inode_info *, struct iattr *);
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long bch2_fallocate_dispatch(struct file *, int, loff_t, loff_t);
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loff_t bch2_remap_file_range(struct file *, loff_t, struct file *,
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loff_t, loff_t, unsigned);
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loff_t bch2_llseek(struct file *, loff_t, int);
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void bch2_fs_fsio_exit(struct bch_fs *);
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int bch2_fs_fsio_init(struct bch_fs *);
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#else
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static inline void bch2_fs_fsio_exit(struct bch_fs *c) {}
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static inline int bch2_fs_fsio_init(struct bch_fs *c) { return 0; }
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#endif
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#endif /* _BCACHEFS_FS_IO_H */
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