2017-03-17 06:18:50 +00:00
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// SPDX-License-Identifier: GPL-2.0
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#ifndef NO_BCACHEFS_FS
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#include "bcachefs.h"
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#include "btree_update.h"
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#include "buckets.h"
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#include "clock.h"
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#include "error.h"
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2018-08-05 21:46:41 +00:00
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#include "extents.h"
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2017-03-17 06:18:50 +00:00
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#include "fs.h"
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#include "fs-io.h"
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#include "fsck.h"
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#include "inode.h"
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#include "journal.h"
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#include "io.h"
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#include "keylist.h"
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#include "quota.h"
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#include "trace.h"
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#include <linux/aio.h>
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#include <linux/backing-dev.h>
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#include <linux/falloc.h>
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#include <linux/migrate.h>
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#include <linux/mmu_context.h>
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#include <linux/pagevec.h>
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#include <linux/sched/signal.h>
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#include <linux/task_io_accounting_ops.h>
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#include <linux/uio.h>
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#include <linux/writeback.h>
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#include <trace/events/writeback.h>
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struct quota_res {
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u64 sectors;
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};
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struct bchfs_write_op {
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struct bch_inode_info *inode;
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s64 sectors_added;
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bool is_dio;
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bool unalloc;
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u64 new_i_size;
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/* must be last: */
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struct bch_write_op op;
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};
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struct bch_writepage_io {
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struct closure cl;
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u64 new_sectors;
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/* must be last: */
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struct bchfs_write_op op;
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};
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struct dio_write {
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struct closure cl;
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struct kiocb *req;
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struct task_struct *task;
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unsigned loop:1,
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sync:1,
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free_iov:1;
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struct quota_res quota_res;
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struct iov_iter iter;
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struct iovec inline_vecs[2];
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/* must be last: */
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struct bchfs_write_op iop;
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};
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struct dio_read {
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struct closure cl;
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struct kiocb *req;
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long ret;
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struct bch_read_bio rbio;
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};
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/* pagecache_block must be held */
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static int write_invalidate_inode_pages_range(struct address_space *mapping,
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loff_t start, loff_t end)
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{
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int ret;
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/*
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* XXX: the way this is currently implemented, we can spin if a process
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* is continually redirtying a specific page
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*/
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do {
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if (!mapping->nrpages)
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return 0;
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ret = filemap_write_and_wait_range(mapping, start, end);
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if (ret)
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break;
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if (!mapping->nrpages)
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return 0;
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ret = invalidate_inode_pages2_range(mapping,
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start >> PAGE_SHIFT,
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end >> PAGE_SHIFT);
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} while (ret == -EBUSY);
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return ret;
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}
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/* quotas */
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#ifdef CONFIG_BCACHEFS_QUOTA
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static 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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return;
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mutex_lock(&inode->ei_quota_lock);
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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), BCH_QUOTA_PREALLOC);
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inode->ei_quota_reserved -= res->sectors;
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mutex_unlock(&inode->ei_quota_lock);
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res->sectors = 0;
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}
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static 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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int ret;
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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 ? BCH_QUOTA_PREALLOC : BCH_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 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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}
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static 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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/* i_size updates: */
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2018-07-17 18:12:42 +00:00
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struct inode_new_size {
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loff_t new_size;
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u64 now;
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unsigned fields;
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};
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2017-03-17 06:18:50 +00:00
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static int inode_set_size(struct bch_inode_info *inode,
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struct bch_inode_unpacked *bi,
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void *p)
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{
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2018-07-17 18:12:42 +00:00
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struct inode_new_size *s = p;
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2017-03-17 06:18:50 +00:00
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2018-07-17 18:12:42 +00:00
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bi->bi_size = s->new_size;
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if (s->fields & ATTR_ATIME)
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bi->bi_atime = s->now;
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if (s->fields & ATTR_MTIME)
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bi->bi_mtime = s->now;
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if (s->fields & ATTR_CTIME)
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bi->bi_ctime = s->now;
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2017-03-17 06:18:50 +00:00
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return 0;
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}
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static int __must_check bch2_write_inode_size(struct bch_fs *c,
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struct bch_inode_info *inode,
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2018-07-17 18:12:42 +00:00
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loff_t new_size, unsigned fields)
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2017-03-17 06:18:50 +00:00
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{
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2018-07-17 18:12:42 +00:00
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struct inode_new_size s = {
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.new_size = new_size,
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.now = bch2_current_time(c),
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.fields = fields,
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};
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return bch2_write_inode(c, inode, inode_set_size, &s, fields);
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2017-03-17 06:18:50 +00:00
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}
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static void i_sectors_acct(struct bch_fs *c, struct bch_inode_info *inode,
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2018-08-05 21:48:00 +00:00
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struct quota_res *quota_res, s64 sectors)
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2017-03-17 06:18:50 +00:00
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{
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2018-08-05 21:48:00 +00:00
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if (!sectors)
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return;
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2017-03-17 06:18:50 +00:00
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mutex_lock(&inode->ei_quota_lock);
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#ifdef CONFIG_BCACHEFS_QUOTA
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if (quota_res && sectors > 0) {
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BUG_ON(sectors > quota_res->sectors);
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BUG_ON(sectors > inode->ei_quota_reserved);
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quota_res->sectors -= sectors;
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inode->ei_quota_reserved -= sectors;
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} else {
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bch2_quota_acct(c, inode->ei_qid, Q_SPC, sectors, BCH_QUOTA_WARN);
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}
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#endif
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inode->v.i_blocks += sectors;
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mutex_unlock(&inode->ei_quota_lock);
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}
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/* normal i_size/i_sectors update machinery: */
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2018-08-08 22:42:04 +00:00
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static s64 sum_sector_overwrites(struct bkey_i *new, struct btree_iter *_iter,
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bool *allocating)
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{
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struct btree_iter iter;
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struct bkey_s_c old;
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s64 delta = 0;
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2017-03-17 06:18:50 +00:00
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2018-08-08 22:42:04 +00:00
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bch2_btree_iter_init(&iter, _iter->c, BTREE_ID_EXTENTS, POS_MIN,
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BTREE_ITER_SLOTS);
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2017-03-17 06:18:50 +00:00
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2018-08-08 22:42:04 +00:00
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bch2_btree_iter_link(_iter, &iter);
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bch2_btree_iter_copy(&iter, _iter);
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2017-03-17 06:18:50 +00:00
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2018-08-08 22:42:04 +00:00
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for_each_btree_key_continue(&iter, BTREE_ITER_SLOTS, old) {
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if (bkey_cmp(new->k.p, bkey_start_pos(old.k)) <= 0)
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break;
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if (allocating &&
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!bch2_extent_is_fully_allocated(old))
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*allocating = true;
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delta += (min(new->k.p.offset,
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old.k->p.offset) -
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max(bkey_start_offset(&new->k),
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bkey_start_offset(old.k))) *
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(bkey_extent_is_allocation(&new->k) -
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bkey_extent_is_allocation(old.k));
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}
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bch2_btree_iter_unlink(&iter);
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return delta;
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}
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static int bch2_extent_update(struct btree_trans *trans,
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struct bch_inode_info *inode,
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struct disk_reservation *disk_res,
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struct quota_res *quota_res,
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struct btree_iter *extent_iter,
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struct bkey_i *k,
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u64 new_i_size,
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bool may_allocate,
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bool direct,
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s64 *total_delta)
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2017-03-17 06:18:50 +00:00
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{
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2018-08-08 22:42:04 +00:00
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struct btree_iter *inode_iter = NULL;
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struct bch_inode_unpacked inode_u;
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struct bkey_inode_buf inode_p;
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bool allocating = false;
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bool extended = false;
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s64 i_sectors_delta;
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int ret;
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2017-03-17 06:18:50 +00:00
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2018-08-08 22:42:04 +00:00
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bch2_trans_begin_updates(trans);
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2017-03-17 06:18:50 +00:00
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2018-08-08 22:42:04 +00:00
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ret = bch2_btree_iter_traverse(extent_iter);
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if (ret)
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return ret;
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2017-03-17 06:18:50 +00:00
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2018-08-08 22:42:04 +00:00
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bch2_extent_trim_atomic(k, extent_iter);
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i_sectors_delta = sum_sector_overwrites(k, extent_iter, &allocating);
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if (!may_allocate && allocating)
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return -ENOSPC;
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2017-03-17 06:18:50 +00:00
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2018-08-08 22:42:04 +00:00
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bch2_trans_update(trans, BTREE_INSERT_ENTRY(extent_iter, k));
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new_i_size = min(k->k.p.offset << 9, new_i_size);
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/* XXX: inode->i_size locking */
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if (i_sectors_delta ||
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new_i_size > inode->ei_inode.bi_size) {
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inode_iter = bch2_trans_get_iter(trans,
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BTREE_ID_INODES,
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POS(k->k.p.inode, 0),
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BTREE_ITER_SLOTS|BTREE_ITER_INTENT);
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if (IS_ERR(inode_iter))
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return PTR_ERR(inode_iter);
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ret = bch2_btree_iter_traverse(inode_iter);
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if (ret)
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goto err;
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2017-03-17 06:18:50 +00:00
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2018-08-08 22:42:04 +00:00
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inode_u = inode->ei_inode;
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inode_u.bi_sectors += i_sectors_delta;
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2017-03-17 06:18:50 +00:00
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2018-08-08 22:42:04 +00:00
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/* XXX: this is slightly suspect */
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if (!(inode_u.bi_flags & BCH_INODE_I_SIZE_DIRTY) &&
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new_i_size > inode_u.bi_size) {
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inode_u.bi_size = new_i_size;
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extended = true;
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2017-03-17 06:18:50 +00:00
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}
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2018-08-08 22:42:04 +00:00
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bch2_inode_pack(&inode_p, &inode_u);
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bch2_trans_update(trans,
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BTREE_INSERT_ENTRY(inode_iter, &inode_p.inode.k_i));
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2017-03-17 06:18:50 +00:00
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}
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2018-08-08 23:53:30 +00:00
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ret = bch2_trans_commit(trans, disk_res,
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2018-08-08 22:42:04 +00:00
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&inode->ei_journal_seq,
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BTREE_INSERT_NOFAIL|
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BTREE_INSERT_ATOMIC|
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BTREE_INSERT_NOUNLOCK|
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BTREE_INSERT_USE_RESERVE);
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if (ret)
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goto err;
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inode->ei_inode.bi_sectors += i_sectors_delta;
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2017-03-17 06:18:50 +00:00
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2018-08-08 22:42:04 +00:00
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EBUG_ON(i_sectors_delta &&
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inode->ei_inode.bi_sectors != inode_u.bi_sectors);
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if (extended) {
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inode->ei_inode.bi_size = new_i_size;
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if (direct) {
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spin_lock(&inode->v.i_lock);
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if (new_i_size > inode->v.i_size)
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i_size_write(&inode->v, new_i_size);
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spin_unlock(&inode->v.i_lock);
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}
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2017-03-17 06:18:50 +00:00
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}
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|
|
2018-08-08 22:42:04 +00:00
|
|
|
if (direct)
|
|
|
|
i_sectors_acct(trans->c, inode, quota_res, i_sectors_delta);
|
2017-03-17 06:18:50 +00:00
|
|
|
|
2018-08-08 22:42:04 +00:00
|
|
|
if (total_delta)
|
|
|
|
*total_delta += i_sectors_delta;
|
|
|
|
err:
|
|
|
|
if (!IS_ERR_OR_NULL(inode_iter))
|
|
|
|
bch2_trans_iter_put(trans, inode_iter);
|
|
|
|
return ret;
|
2017-03-17 06:18:50 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static int bchfs_write_index_update(struct bch_write_op *wop)
|
|
|
|
{
|
|
|
|
struct bchfs_write_op *op = container_of(wop,
|
|
|
|
struct bchfs_write_op, op);
|
2018-08-08 22:42:04 +00:00
|
|
|
struct quota_res *quota_res = op->is_dio
|
|
|
|
? &container_of(op, struct dio_write, iop)->quota_res
|
|
|
|
: NULL;
|
|
|
|
struct bch_inode_info *inode = op->inode;
|
2017-03-17 06:18:50 +00:00
|
|
|
struct keylist *keys = &op->op.insert_keys;
|
|
|
|
struct bkey_i *k = bch2_keylist_front(keys);
|
2018-08-08 22:42:04 +00:00
|
|
|
struct btree_trans trans;
|
|
|
|
struct btree_iter *iter;
|
2017-03-17 06:18:50 +00:00
|
|
|
int ret;
|
|
|
|
|
2018-08-08 22:42:04 +00:00
|
|
|
BUG_ON(k->k.p.inode != inode->v.i_ino);
|
2017-03-17 06:18:50 +00:00
|
|
|
|
2018-07-12 23:19:41 +00:00
|
|
|
bch2_trans_init(&trans, wop->c);
|
2018-08-08 22:42:04 +00:00
|
|
|
bch2_trans_preload_iters(&trans);
|
2018-07-12 23:19:41 +00:00
|
|
|
|
2018-08-08 22:42:04 +00:00
|
|
|
iter = bch2_trans_get_iter(&trans,
|
2018-07-12 23:19:41 +00:00
|
|
|
BTREE_ID_EXTENTS,
|
2018-08-08 22:42:04 +00:00
|
|
|
bkey_start_pos(&k->k),
|
2018-07-12 23:19:41 +00:00
|
|
|
BTREE_ITER_INTENT);
|
2017-03-17 06:18:50 +00:00
|
|
|
|
|
|
|
do {
|
2018-08-05 21:46:41 +00:00
|
|
|
BKEY_PADDED(k) tmp;
|
2017-03-17 06:18:50 +00:00
|
|
|
|
2018-08-05 21:46:41 +00:00
|
|
|
bkey_copy(&tmp.k, bch2_keylist_front(keys));
|
2017-03-17 06:18:50 +00:00
|
|
|
|
2018-08-08 22:42:04 +00:00
|
|
|
ret = bch2_extent_update(&trans, inode,
|
|
|
|
&wop->res, quota_res,
|
|
|
|
iter, &tmp.k,
|
|
|
|
op->new_i_size,
|
|
|
|
!op->unalloc,
|
|
|
|
op->is_dio,
|
|
|
|
&op->sectors_added);
|
2017-03-17 06:18:50 +00:00
|
|
|
if (ret == -EINTR)
|
|
|
|
continue;
|
|
|
|
if (ret)
|
|
|
|
break;
|
|
|
|
|
2018-08-08 22:42:04 +00:00
|
|
|
if (bkey_cmp(iter->pos, bch2_keylist_front(keys)->k.p) < 0)
|
|
|
|
bch2_cut_front(iter->pos, bch2_keylist_front(keys));
|
2018-08-05 21:46:41 +00:00
|
|
|
else
|
|
|
|
bch2_keylist_pop_front(keys);
|
2017-03-17 06:18:50 +00:00
|
|
|
} while (!bch2_keylist_empty(keys));
|
|
|
|
|
2018-07-12 23:19:41 +00:00
|
|
|
bch2_trans_exit(&trans);
|
2017-03-17 06:18:50 +00:00
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline void bch2_fswrite_op_init(struct bchfs_write_op *op,
|
|
|
|
struct bch_fs *c,
|
|
|
|
struct bch_inode_info *inode,
|
|
|
|
struct bch_io_opts opts,
|
|
|
|
bool is_dio)
|
|
|
|
{
|
|
|
|
op->inode = inode;
|
|
|
|
op->sectors_added = 0;
|
|
|
|
op->is_dio = is_dio;
|
|
|
|
op->unalloc = false;
|
|
|
|
op->new_i_size = U64_MAX;
|
|
|
|
|
|
|
|
bch2_write_op_init(&op->op, c, opts);
|
|
|
|
op->op.target = opts.foreground_target;
|
|
|
|
op->op.index_update_fn = bchfs_write_index_update;
|
|
|
|
op_journal_seq_set(&op->op, &inode->ei_journal_seq);
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline struct bch_io_opts io_opts(struct bch_fs *c, struct bch_inode_info *inode)
|
|
|
|
{
|
|
|
|
struct bch_io_opts opts = bch2_opts_to_inode_opts(c->opts);
|
|
|
|
|
|
|
|
bch2_io_opts_apply(&opts, bch2_inode_opts_get(&inode->ei_inode));
|
|
|
|
return opts;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* page state: */
|
|
|
|
|
|
|
|
/* stored in page->private: */
|
|
|
|
|
|
|
|
/*
|
|
|
|
* bch_page_state has to (unfortunately) be manipulated with cmpxchg - we could
|
|
|
|
* almost protected it with the page lock, except that bch2_writepage_io_done has
|
|
|
|
* to update the sector counts (and from interrupt/bottom half context).
|
|
|
|
*/
|
|
|
|
struct bch_page_state {
|
|
|
|
union { struct {
|
|
|
|
/* existing data: */
|
|
|
|
unsigned sectors:PAGE_SECTOR_SHIFT + 1;
|
|
|
|
unsigned nr_replicas:4;
|
|
|
|
unsigned compressed:1;
|
|
|
|
|
|
|
|
/* Owns PAGE_SECTORS sized reservation: */
|
|
|
|
unsigned reserved:1;
|
|
|
|
unsigned reservation_replicas:4;
|
|
|
|
|
|
|
|
/* Owns PAGE_SECTORS sized quota reservation: */
|
|
|
|
unsigned quota_reserved:1;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Number of sectors on disk - for i_blocks
|
|
|
|
* Uncompressed size, not compressed size:
|
|
|
|
*/
|
|
|
|
unsigned dirty_sectors:PAGE_SECTOR_SHIFT + 1;
|
|
|
|
};
|
|
|
|
/* for cmpxchg: */
|
|
|
|
unsigned long v;
|
|
|
|
};
|
|
|
|
};
|
|
|
|
|
|
|
|
#define page_state_cmpxchg(_ptr, _new, _expr) \
|
|
|
|
({ \
|
|
|
|
unsigned long _v = READ_ONCE((_ptr)->v); \
|
|
|
|
struct bch_page_state _old; \
|
|
|
|
\
|
|
|
|
do { \
|
|
|
|
_old.v = _new.v = _v; \
|
|
|
|
_expr; \
|
|
|
|
\
|
|
|
|
EBUG_ON(_new.sectors + _new.dirty_sectors > PAGE_SECTORS);\
|
|
|
|
} while (_old.v != _new.v && \
|
|
|
|
(_v = cmpxchg(&(_ptr)->v, _old.v, _new.v)) != _old.v); \
|
|
|
|
\
|
|
|
|
_old; \
|
|
|
|
})
|
|
|
|
|
|
|
|
static inline struct bch_page_state *page_state(struct page *page)
|
|
|
|
{
|
|
|
|
struct bch_page_state *s = (void *) &page->private;
|
|
|
|
|
|
|
|
BUILD_BUG_ON(sizeof(*s) > sizeof(page->private));
|
|
|
|
|
|
|
|
if (!PagePrivate(page))
|
|
|
|
SetPagePrivate(page);
|
|
|
|
|
|
|
|
return s;
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline unsigned page_res_sectors(struct bch_page_state s)
|
|
|
|
{
|
|
|
|
|
|
|
|
return s.reserved ? s.reservation_replicas * PAGE_SECTORS : 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void __bch2_put_page_reservation(struct bch_fs *c, struct bch_inode_info *inode,
|
|
|
|
struct bch_page_state s)
|
|
|
|
{
|
|
|
|
struct disk_reservation res = { .sectors = page_res_sectors(s) };
|
|
|
|
struct quota_res quota_res = { .sectors = s.quota_reserved ? PAGE_SECTORS : 0 };
|
|
|
|
|
|
|
|
bch2_quota_reservation_put(c, inode, "a_res);
|
|
|
|
bch2_disk_reservation_put(c, &res);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void bch2_put_page_reservation(struct bch_fs *c, struct bch_inode_info *inode,
|
|
|
|
struct page *page)
|
|
|
|
{
|
|
|
|
struct bch_page_state s;
|
|
|
|
|
|
|
|
s = page_state_cmpxchg(page_state(page), s, {
|
|
|
|
s.reserved = 0;
|
|
|
|
s.quota_reserved = 0;
|
|
|
|
});
|
|
|
|
|
|
|
|
__bch2_put_page_reservation(c, inode, s);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int bch2_get_page_reservation(struct bch_fs *c, struct bch_inode_info *inode,
|
|
|
|
struct page *page, bool check_enospc)
|
|
|
|
{
|
|
|
|
struct bch_page_state *s = page_state(page), new, old;
|
|
|
|
|
|
|
|
/* XXX: this should not be open coded */
|
|
|
|
unsigned nr_replicas = inode->ei_inode.bi_data_replicas
|
|
|
|
? inode->ei_inode.bi_data_replicas - 1
|
|
|
|
: c->opts.data_replicas;
|
|
|
|
|
|
|
|
struct disk_reservation disk_res = bch2_disk_reservation_init(c,
|
|
|
|
nr_replicas);
|
|
|
|
struct quota_res quota_res = { 0 };
|
|
|
|
int ret = 0;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* XXX: this could likely be quite a bit simpler, page reservations
|
|
|
|
* _should_ only be manipulated with page locked:
|
|
|
|
*/
|
|
|
|
|
|
|
|
old = page_state_cmpxchg(s, new, {
|
|
|
|
if (new.reserved
|
|
|
|
? (new.reservation_replicas < disk_res.nr_replicas)
|
|
|
|
: (new.sectors < PAGE_SECTORS ||
|
|
|
|
new.nr_replicas < disk_res.nr_replicas ||
|
|
|
|
new.compressed)) {
|
|
|
|
int sectors = (disk_res.nr_replicas * PAGE_SECTORS -
|
|
|
|
page_res_sectors(new) -
|
|
|
|
disk_res.sectors);
|
|
|
|
|
|
|
|
if (sectors > 0) {
|
|
|
|
ret = bch2_disk_reservation_add(c, &disk_res, sectors,
|
|
|
|
!check_enospc
|
|
|
|
? BCH_DISK_RESERVATION_NOFAIL : 0);
|
|
|
|
if (unlikely(ret))
|
|
|
|
goto err;
|
|
|
|
}
|
|
|
|
|
|
|
|
new.reserved = 1;
|
|
|
|
new.reservation_replicas = disk_res.nr_replicas;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!new.quota_reserved &&
|
|
|
|
new.sectors + new.dirty_sectors < PAGE_SECTORS) {
|
|
|
|
ret = bch2_quota_reservation_add(c, inode, "a_res,
|
|
|
|
PAGE_SECTORS - quota_res.sectors,
|
|
|
|
check_enospc);
|
|
|
|
if (unlikely(ret))
|
|
|
|
goto err;
|
|
|
|
|
|
|
|
new.quota_reserved = 1;
|
|
|
|
}
|
|
|
|
});
|
|
|
|
|
|
|
|
quota_res.sectors -= (new.quota_reserved - old.quota_reserved) * PAGE_SECTORS;
|
|
|
|
disk_res.sectors -= page_res_sectors(new) - page_res_sectors(old);
|
|
|
|
err:
|
|
|
|
bch2_quota_reservation_put(c, inode, "a_res);
|
|
|
|
bch2_disk_reservation_put(c, &disk_res);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void bch2_clear_page_bits(struct page *page)
|
|
|
|
{
|
|
|
|
struct bch_inode_info *inode = to_bch_ei(page->mapping->host);
|
|
|
|
struct bch_fs *c = inode->v.i_sb->s_fs_info;
|
|
|
|
struct bch_page_state s;
|
|
|
|
|
|
|
|
if (!PagePrivate(page))
|
|
|
|
return;
|
|
|
|
|
|
|
|
s.v = xchg(&page_state(page)->v, 0);
|
|
|
|
ClearPagePrivate(page);
|
|
|
|
|
|
|
|
if (s.dirty_sectors)
|
|
|
|
i_sectors_acct(c, inode, NULL, -s.dirty_sectors);
|
|
|
|
|
|
|
|
__bch2_put_page_reservation(c, inode, s);
|
|
|
|
}
|
|
|
|
|
|
|
|
bool bch2_dirty_folio(struct address_space *mapping, struct folio *folio)
|
|
|
|
{
|
|
|
|
struct bch_inode_info *inode = to_bch_ei(mapping->host);
|
|
|
|
struct bch_fs *c = inode->v.i_sb->s_fs_info;
|
|
|
|
struct quota_res quota_res = { 0 };
|
|
|
|
struct bch_page_state old, new;
|
|
|
|
|
|
|
|
old = page_state_cmpxchg(page_state(&folio->page), new,
|
|
|
|
new.dirty_sectors = PAGE_SECTORS - new.sectors;
|
|
|
|
new.quota_reserved = 0;
|
|
|
|
);
|
|
|
|
|
|
|
|
quota_res.sectors += old.quota_reserved * PAGE_SECTORS;
|
|
|
|
|
|
|
|
if (old.dirty_sectors != new.dirty_sectors)
|
|
|
|
i_sectors_acct(c, inode, "a_res,
|
|
|
|
new.dirty_sectors - old.dirty_sectors);
|
|
|
|
bch2_quota_reservation_put(c, inode, "a_res);
|
|
|
|
|
|
|
|
return filemap_dirty_folio(mapping, folio);
|
|
|
|
}
|
|
|
|
|
|
|
|
vm_fault_t bch2_page_fault(struct vm_fault *vmf)
|
|
|
|
{
|
|
|
|
struct file *file = vmf->vma->vm_file;
|
|
|
|
struct bch_inode_info *inode = file_bch_inode(file);
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
bch2_pagecache_add_get(&inode->ei_pagecache_lock);
|
|
|
|
ret = filemap_fault(vmf);
|
|
|
|
bch2_pagecache_add_put(&inode->ei_pagecache_lock);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
vm_fault_t bch2_page_mkwrite(struct vm_fault *vmf)
|
|
|
|
{
|
|
|
|
struct page *page = vmf->page;
|
|
|
|
struct file *file = vmf->vma->vm_file;
|
|
|
|
struct bch_inode_info *inode = file_bch_inode(file);
|
|
|
|
struct address_space *mapping = file->f_mapping;
|
|
|
|
struct bch_fs *c = inode->v.i_sb->s_fs_info;
|
|
|
|
int ret = VM_FAULT_LOCKED;
|
|
|
|
|
|
|
|
sb_start_pagefault(inode->v.i_sb);
|
|
|
|
file_update_time(file);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Not strictly necessary, but helps avoid dio writes livelocking in
|
|
|
|
* write_invalidate_inode_pages_range() - can drop this if/when we get
|
|
|
|
* a write_invalidate_inode_pages_range() that works without dropping
|
|
|
|
* page lock before invalidating page
|
|
|
|
*/
|
|
|
|
bch2_pagecache_add_get(&inode->ei_pagecache_lock);
|
|
|
|
|
|
|
|
lock_page(page);
|
|
|
|
if (page->mapping != mapping ||
|
|
|
|
page_offset(page) > i_size_read(&inode->v)) {
|
|
|
|
unlock_page(page);
|
|
|
|
ret = VM_FAULT_NOPAGE;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (bch2_get_page_reservation(c, inode, page, true)) {
|
|
|
|
unlock_page(page);
|
|
|
|
ret = VM_FAULT_SIGBUS;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!PageDirty(page))
|
|
|
|
set_page_dirty(page);
|
|
|
|
wait_for_stable_page(page);
|
|
|
|
out:
|
|
|
|
bch2_pagecache_add_put(&inode->ei_pagecache_lock);
|
|
|
|
sb_end_pagefault(inode->v.i_sb);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
void bch2_invalidate_folio(struct folio *folio, size_t offset, size_t length)
|
|
|
|
{
|
|
|
|
EBUG_ON(!PageLocked(&folio->page));
|
|
|
|
EBUG_ON(folio_test_writeback(folio));
|
|
|
|
|
|
|
|
if (offset || length < folio_size(folio))
|
|
|
|
return;
|
|
|
|
|
|
|
|
bch2_clear_page_bits(&folio->page);
|
|
|
|
}
|
|
|
|
|
|
|
|
bool bch2_release_folio(struct folio *folio, gfp_t gfp_mask)
|
|
|
|
{
|
|
|
|
/* XXX: this can't take locks that are held while we allocate memory */
|
|
|
|
EBUG_ON(!PageLocked(&folio->page));
|
|
|
|
EBUG_ON(folio_test_writeback(folio));
|
|
|
|
|
|
|
|
if (folio_test_dirty(folio))
|
|
|
|
return false;
|
|
|
|
|
|
|
|
bch2_clear_page_bits(&folio->page);
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* readpages/writepages: */
|
|
|
|
|
|
|
|
static bool bio_can_add_page_contig(struct bio *bio, struct page *page)
|
|
|
|
{
|
|
|
|
sector_t offset = (sector_t) page->index << PAGE_SECTOR_SHIFT;
|
|
|
|
|
|
|
|
return bio->bi_vcnt < bio->bi_max_vecs &&
|
|
|
|
bio_end_sector(bio) == offset;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int bio_add_page_contig(struct bio *bio, struct page *page)
|
|
|
|
{
|
|
|
|
sector_t offset = (sector_t) page->index << PAGE_SECTOR_SHIFT;
|
|
|
|
|
|
|
|
EBUG_ON(!bio->bi_max_vecs);
|
|
|
|
|
|
|
|
if (!bio->bi_vcnt)
|
|
|
|
bio->bi_iter.bi_sector = offset;
|
|
|
|
else if (!bio_can_add_page_contig(bio, page))
|
|
|
|
return -1;
|
|
|
|
|
|
|
|
__bio_add_page(bio, page, PAGE_SIZE, 0);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* readpage(s): */
|
|
|
|
|
|
|
|
static void bch2_readpages_end_io(struct bio *bio)
|
|
|
|
{
|
|
|
|
struct bvec_iter_all iter;
|
|
|
|
struct bio_vec *bv;
|
|
|
|
|
|
|
|
bio_for_each_segment_all(bv, bio, iter) {
|
|
|
|
struct page *page = bv->bv_page;
|
|
|
|
|
|
|
|
if (!bio->bi_status) {
|
|
|
|
SetPageUptodate(page);
|
|
|
|
} else {
|
|
|
|
ClearPageUptodate(page);
|
|
|
|
SetPageError(page);
|
|
|
|
}
|
|
|
|
unlock_page(page);
|
|
|
|
}
|
|
|
|
|
|
|
|
bio_put(bio);
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline void page_state_init_for_read(struct page *page)
|
|
|
|
{
|
|
|
|
struct bch_page_state *s = page_state(page);
|
|
|
|
|
|
|
|
BUG_ON(s->reserved);
|
|
|
|
s->sectors = 0;
|
|
|
|
s->compressed = 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
struct readpages_iter {
|
|
|
|
struct address_space *mapping;
|
|
|
|
struct page **pages;
|
|
|
|
unsigned nr_pages;
|
|
|
|
unsigned idx;
|
|
|
|
pgoff_t offset;
|
|
|
|
};
|
|
|
|
|
|
|
|
static int readpages_iter_init(struct readpages_iter *iter,
|
|
|
|
struct readahead_control *ractl)
|
|
|
|
{
|
|
|
|
unsigned i, nr_pages = readahead_count(ractl);
|
|
|
|
|
|
|
|
memset(iter, 0, sizeof(*iter));
|
|
|
|
|
|
|
|
iter->mapping = ractl->mapping;
|
|
|
|
iter->offset = readahead_index(ractl);
|
|
|
|
iter->nr_pages = nr_pages;
|
|
|
|
|
|
|
|
iter->pages = kmalloc_array(nr_pages, sizeof(struct page *), GFP_NOFS);
|
|
|
|
if (!iter->pages)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
__readahead_batch(ractl, iter->pages, nr_pages);
|
|
|
|
for (i = 0; i < nr_pages; i++) {
|
|
|
|
put_page(iter->pages[i]);
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline struct page *readpage_iter_next(struct readpages_iter *iter)
|
|
|
|
{
|
|
|
|
if (iter->idx >= iter->nr_pages)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
EBUG_ON(iter->pages[iter->idx]->index != iter->offset + iter->idx);
|
|
|
|
|
|
|
|
page_state_init_for_read(iter->pages[iter->idx]);
|
|
|
|
return iter->pages[iter->idx];
|
|
|
|
}
|
|
|
|
|
|
|
|
static void bch2_add_page_sectors(struct bio *bio, struct bkey_s_c k)
|
|
|
|
{
|
|
|
|
struct bvec_iter iter;
|
|
|
|
struct bio_vec bv;
|
|
|
|
bool compressed = bch2_extent_is_compressed(k);
|
|
|
|
unsigned nr_ptrs = bch2_extent_nr_dirty_ptrs(k);
|
|
|
|
|
|
|
|
bio_for_each_segment(bv, bio, iter) {
|
|
|
|
struct bch_page_state *s = page_state(bv.bv_page);
|
|
|
|
|
|
|
|
/* sectors in @k from the start of this page: */
|
|
|
|
unsigned k_sectors = k.k->size - (iter.bi_sector - k.k->p.offset);
|
|
|
|
|
|
|
|
unsigned page_sectors = min(bv.bv_len >> 9, k_sectors);
|
|
|
|
|
|
|
|
s->nr_replicas = !s->sectors
|
|
|
|
? nr_ptrs
|
|
|
|
: min_t(unsigned, s->nr_replicas, nr_ptrs);
|
|
|
|
|
|
|
|
BUG_ON(s->sectors + page_sectors > PAGE_SECTORS);
|
|
|
|
s->sectors += page_sectors;
|
|
|
|
|
|
|
|
s->compressed |= compressed;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void readpage_bio_extend(struct readpages_iter *iter,
|
|
|
|
struct bio *bio, u64 offset,
|
|
|
|
bool get_more)
|
|
|
|
{
|
|
|
|
while (bio_end_sector(bio) < offset &&
|
|
|
|
bio->bi_vcnt < bio->bi_max_vecs) {
|
|
|
|
pgoff_t page_offset = bio_end_sector(bio) >> PAGE_SECTOR_SHIFT;
|
|
|
|
struct page *page = readpage_iter_next(iter);
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
if (page) {
|
|
|
|
if (iter->offset + iter->idx != page_offset)
|
|
|
|
break;
|
|
|
|
|
|
|
|
iter->idx++;
|
|
|
|
} else {
|
|
|
|
if (!get_more)
|
|
|
|
break;
|
|
|
|
|
|
|
|
page = xa_load(&iter->mapping->i_pages, page_offset);
|
|
|
|
if (page && !xa_is_value(page))
|
|
|
|
break;
|
|
|
|
|
|
|
|
page = __page_cache_alloc(readahead_gfp_mask(iter->mapping));
|
|
|
|
if (!page)
|
|
|
|
break;
|
|
|
|
|
|
|
|
page_state_init_for_read(page);
|
|
|
|
|
|
|
|
ret = add_to_page_cache_lru(page, iter->mapping,
|
|
|
|
page_offset, GFP_NOFS);
|
|
|
|
if (ret) {
|
|
|
|
ClearPagePrivate(page);
|
|
|
|
put_page(page);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
put_page(page);
|
|
|
|
}
|
|
|
|
|
|
|
|
__bio_add_page(bio, page, PAGE_SIZE, 0);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void bchfs_read(struct bch_fs *c, struct btree_iter *iter,
|
|
|
|
struct bch_read_bio *rbio, u64 inum,
|
|
|
|
struct readpages_iter *readpages_iter)
|
|
|
|
{
|
|
|
|
struct bio *bio = &rbio->bio;
|
|
|
|
int flags = BCH_READ_RETRY_IF_STALE|
|
|
|
|
BCH_READ_MAY_PROMOTE;
|
|
|
|
|
|
|
|
rbio->c = c;
|
|
|
|
rbio->start_time = local_clock();
|
|
|
|
|
|
|
|
while (1) {
|
|
|
|
BKEY_PADDED(k) tmp;
|
|
|
|
struct bkey_s_c k;
|
|
|
|
unsigned bytes;
|
|
|
|
|
|
|
|
bch2_btree_iter_set_pos(iter, POS(inum, bio->bi_iter.bi_sector));
|
|
|
|
|
|
|
|
k = bch2_btree_iter_peek_slot(iter);
|
|
|
|
BUG_ON(!k.k);
|
|
|
|
|
|
|
|
if (IS_ERR(k.k)) {
|
|
|
|
int ret = bch2_btree_iter_unlock(iter);
|
|
|
|
BUG_ON(!ret);
|
|
|
|
bcache_io_error(c, bio, "btree IO error %i", ret);
|
|
|
|
bio_endio(bio);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
bkey_reassemble(&tmp.k, k);
|
|
|
|
bch2_btree_iter_unlock(iter);
|
|
|
|
k = bkey_i_to_s_c(&tmp.k);
|
|
|
|
|
|
|
|
if (readpages_iter) {
|
|
|
|
bool want_full_extent = false;
|
|
|
|
|
|
|
|
if (bkey_extent_is_data(k.k)) {
|
|
|
|
struct bkey_s_c_extent e = bkey_s_c_to_extent(k);
|
|
|
|
struct bch_extent_crc_unpacked crc;
|
|
|
|
const union bch_extent_entry *i;
|
|
|
|
|
|
|
|
extent_for_each_crc(e, crc, i)
|
|
|
|
want_full_extent |= ((crc.csum_type != 0) |
|
|
|
|
(crc.compression_type != 0));
|
|
|
|
}
|
|
|
|
|
|
|
|
readpage_bio_extend(readpages_iter,
|
|
|
|
bio, k.k->p.offset,
|
|
|
|
want_full_extent);
|
|
|
|
}
|
|
|
|
|
|
|
|
bytes = (min_t(u64, k.k->p.offset, bio_end_sector(bio)) -
|
|
|
|
bio->bi_iter.bi_sector) << 9;
|
|
|
|
swap(bio->bi_iter.bi_size, bytes);
|
|
|
|
|
|
|
|
if (bytes == bio->bi_iter.bi_size)
|
|
|
|
flags |= BCH_READ_LAST_FRAGMENT;
|
|
|
|
|
|
|
|
if (bkey_extent_is_allocation(k.k))
|
|
|
|
bch2_add_page_sectors(bio, k);
|
|
|
|
|
|
|
|
bch2_read_extent(c, rbio, k, flags);
|
|
|
|
|
|
|
|
if (flags & BCH_READ_LAST_FRAGMENT)
|
|
|
|
return;
|
|
|
|
|
|
|
|
swap(bio->bi_iter.bi_size, bytes);
|
|
|
|
bio_advance(bio, bytes);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
void bch2_readahead(struct readahead_control *ractl)
|
|
|
|
{
|
|
|
|
struct bch_inode_info *inode = to_bch_ei(ractl->mapping->host);
|
|
|
|
struct bch_fs *c = inode->v.i_sb->s_fs_info;
|
|
|
|
struct bch_io_opts opts = io_opts(c, inode);
|
|
|
|
struct btree_iter iter;
|
|
|
|
struct page *page;
|
|
|
|
struct readpages_iter readpages_iter;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
ret = readpages_iter_init(&readpages_iter, ractl);
|
|
|
|
BUG_ON(ret);
|
|
|
|
|
|
|
|
bch2_btree_iter_init(&iter, c, BTREE_ID_EXTENTS, POS_MIN,
|
|
|
|
BTREE_ITER_SLOTS);
|
|
|
|
|
|
|
|
bch2_pagecache_add_get(&inode->ei_pagecache_lock);
|
|
|
|
|
|
|
|
while ((page = readpage_iter_next(&readpages_iter))) {
|
|
|
|
pgoff_t index = readpages_iter.offset + readpages_iter.idx;
|
|
|
|
unsigned n = min_t(unsigned,
|
|
|
|
readpages_iter.nr_pages -
|
|
|
|
readpages_iter.idx,
|
|
|
|
BIO_MAX_VECS);
|
|
|
|
struct bch_read_bio *rbio =
|
|
|
|
rbio_init(bio_alloc_bioset(NULL, n, REQ_OP_READ,
|
|
|
|
GFP_NOFS, &c->bio_read),
|
|
|
|
opts);
|
|
|
|
|
|
|
|
readpages_iter.idx++;
|
|
|
|
|
|
|
|
rbio->bio.bi_iter.bi_sector = (sector_t) index << PAGE_SECTOR_SHIFT;
|
|
|
|
rbio->bio.bi_end_io = bch2_readpages_end_io;
|
|
|
|
__bio_add_page(&rbio->bio, page, PAGE_SIZE, 0);
|
|
|
|
|
|
|
|
bchfs_read(c, &iter, rbio, inode->v.i_ino, &readpages_iter);
|
|
|
|
}
|
|
|
|
|
|
|
|
bch2_pagecache_add_put(&inode->ei_pagecache_lock);
|
|
|
|
kfree(readpages_iter.pages);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void __bchfs_readpage(struct bch_fs *c, struct bch_read_bio *rbio,
|
|
|
|
u64 inum, struct page *page)
|
|
|
|
{
|
|
|
|
struct btree_iter iter;
|
|
|
|
|
|
|
|
page_state_init_for_read(page);
|
|
|
|
|
|
|
|
rbio->bio.bi_opf = REQ_OP_READ|REQ_SYNC;
|
|
|
|
bio_add_page_contig(&rbio->bio, page);
|
|
|
|
|
|
|
|
bch2_btree_iter_init(&iter, c, BTREE_ID_EXTENTS, POS_MIN,
|
|
|
|
BTREE_ITER_SLOTS);
|
|
|
|
bchfs_read(c, &iter, rbio, inum, NULL);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void bch2_read_single_page_end_io(struct bio *bio)
|
|
|
|
{
|
|
|
|
complete(bio->bi_private);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int bch2_read_single_page(struct page *page,
|
|
|
|
struct address_space *mapping)
|
|
|
|
{
|
|
|
|
struct bch_inode_info *inode = to_bch_ei(mapping->host);
|
|
|
|
struct bch_fs *c = inode->v.i_sb->s_fs_info;
|
|
|
|
struct bch_read_bio *rbio;
|
|
|
|
int ret;
|
|
|
|
DECLARE_COMPLETION_ONSTACK(done);
|
|
|
|
|
|
|
|
rbio = rbio_init(bio_alloc_bioset(NULL, 1, REQ_OP_READ, GFP_NOFS, &c->bio_read),
|
|
|
|
io_opts(c, inode));
|
|
|
|
rbio->bio.bi_private = &done;
|
|
|
|
rbio->bio.bi_end_io = bch2_read_single_page_end_io;
|
|
|
|
|
|
|
|
__bchfs_readpage(c, rbio, inode->v.i_ino, page);
|
|
|
|
wait_for_completion(&done);
|
|
|
|
|
|
|
|
ret = blk_status_to_errno(rbio->bio.bi_status);
|
|
|
|
bio_put(&rbio->bio);
|
|
|
|
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
SetPageUptodate(page);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
int bch2_read_folio(struct file *file, struct folio *folio)
|
|
|
|
{
|
|
|
|
struct page *page = &folio->page;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
ret = bch2_read_single_page(page, page->mapping);
|
|
|
|
folio_unlock(folio);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* writepages: */
|
|
|
|
|
|
|
|
struct bch_writepage_state {
|
|
|
|
struct bch_writepage_io *io;
|
|
|
|
struct bch_io_opts opts;
|
|
|
|
};
|
|
|
|
|
|
|
|
static inline struct bch_writepage_state bch_writepage_state_init(struct bch_fs *c,
|
|
|
|
struct bch_inode_info *inode)
|
|
|
|
{
|
|
|
|
return (struct bch_writepage_state) { .opts = io_opts(c, inode) };
|
|
|
|
}
|
|
|
|
|
|
|
|
static void bch2_writepage_io_free(struct closure *cl)
|
|
|
|
{
|
|
|
|
struct bch_writepage_io *io = container_of(cl,
|
|
|
|
struct bch_writepage_io, cl);
|
|
|
|
|
|
|
|
bio_put(&io->op.op.wbio.bio);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void bch2_writepage_io_done(struct closure *cl)
|
|
|
|
{
|
|
|
|
struct bch_writepage_io *io = container_of(cl,
|
|
|
|
struct bch_writepage_io, cl);
|
|
|
|
struct bch_fs *c = io->op.op.c;
|
|
|
|
struct bio *bio = &io->op.op.wbio.bio;
|
|
|
|
struct bvec_iter_all iter;
|
|
|
|
struct bio_vec *bvec;
|
|
|
|
|
|
|
|
if (io->op.op.error) {
|
|
|
|
bio_for_each_segment_all(bvec, bio, iter)
|
|
|
|
SetPageError(bvec->bv_page);
|
|
|
|
set_bit(AS_EIO, &io->op.inode->v.i_mapping->flags);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* racing with fallocate can cause us to add fewer sectors than
|
|
|
|
* expected - but we shouldn't add more sectors than expected:
|
|
|
|
*/
|
|
|
|
BUG_ON(io->op.sectors_added > (s64) io->new_sectors);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* (error (due to going RO) halfway through a page can screw that up
|
|
|
|
* slightly)
|
|
|
|
* XXX wtf?
|
|
|
|
BUG_ON(io->op.sectors_added - io->new_sectors >= (s64) PAGE_SECTORS);
|
|
|
|
*/
|
|
|
|
|
|
|
|
/*
|
|
|
|
* PageWriteback is effectively our ref on the inode - fixup i_blocks
|
|
|
|
* before calling end_page_writeback:
|
|
|
|
*/
|
|
|
|
if (io->op.sectors_added != io->new_sectors)
|
|
|
|
i_sectors_acct(c, io->op.inode, NULL,
|
|
|
|
io->op.sectors_added - (s64) io->new_sectors);
|
|
|
|
|
|
|
|
bio_for_each_segment_all(bvec, bio, iter)
|
|
|
|
end_page_writeback(bvec->bv_page);
|
|
|
|
|
|
|
|
closure_return_with_destructor(&io->cl, bch2_writepage_io_free);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void bch2_writepage_do_io(struct bch_writepage_state *w)
|
|
|
|
{
|
|
|
|
struct bch_writepage_io *io = w->io;
|
|
|
|
|
|
|
|
w->io = NULL;
|
|
|
|
closure_call(&io->op.op.cl, bch2_write, NULL, &io->cl);
|
|
|
|
continue_at(&io->cl, bch2_writepage_io_done, NULL);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Get a bch_writepage_io and add @page to it - appending to an existing one if
|
|
|
|
* possible, else allocating a new one:
|
|
|
|
*/
|
|
|
|
static void bch2_writepage_io_alloc(struct bch_fs *c,
|
|
|
|
struct bch_writepage_state *w,
|
|
|
|
struct bch_inode_info *inode,
|
|
|
|
struct page *page,
|
|
|
|
unsigned nr_replicas)
|
|
|
|
{
|
|
|
|
struct bch_write_op *op;
|
|
|
|
u64 offset = (u64) page->index << PAGE_SECTOR_SHIFT;
|
|
|
|
|
|
|
|
w->io = container_of(bio_alloc_bioset(NULL, BIO_MAX_VECS,
|
|
|
|
REQ_OP_WRITE,
|
|
|
|
GFP_NOFS,
|
|
|
|
&c->writepage_bioset),
|
|
|
|
struct bch_writepage_io, op.op.wbio.bio);
|
|
|
|
|
|
|
|
closure_init(&w->io->cl, NULL);
|
|
|
|
w->io->new_sectors = 0;
|
|
|
|
bch2_fswrite_op_init(&w->io->op, c, inode, w->opts, false);
|
|
|
|
op = &w->io->op.op;
|
|
|
|
op->nr_replicas = nr_replicas;
|
|
|
|
op->res.nr_replicas = nr_replicas;
|
|
|
|
op->write_point = writepoint_hashed(inode->ei_last_dirtied);
|
|
|
|
op->pos = POS(inode->v.i_ino, offset);
|
|
|
|
op->wbio.bio.bi_iter.bi_sector = offset;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int __bch2_writepage(struct folio *folio,
|
|
|
|
struct writeback_control *wbc,
|
|
|
|
void *data)
|
|
|
|
{
|
|
|
|
struct page *page = &folio->page;
|
|
|
|
struct bch_inode_info *inode = to_bch_ei(page->mapping->host);
|
|
|
|
struct bch_fs *c = inode->v.i_sb->s_fs_info;
|
|
|
|
struct bch_writepage_state *w = data;
|
|
|
|
struct bch_page_state new, old;
|
|
|
|
unsigned offset;
|
|
|
|
loff_t i_size = i_size_read(&inode->v);
|
|
|
|
pgoff_t end_index = i_size >> PAGE_SHIFT;
|
|
|
|
|
|
|
|
EBUG_ON(!PageUptodate(page));
|
|
|
|
|
|
|
|
/* Is the page fully inside i_size? */
|
|
|
|
if (page->index < end_index)
|
|
|
|
goto do_io;
|
|
|
|
|
|
|
|
/* Is the page fully outside i_size? (truncate in progress) */
|
|
|
|
offset = i_size & (PAGE_SIZE - 1);
|
|
|
|
if (page->index > end_index || !offset) {
|
|
|
|
unlock_page(page);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* The page straddles i_size. It must be zeroed out on each and every
|
|
|
|
* writepage invocation because it may be mmapped. "A file is mapped
|
|
|
|
* in multiples of the page size. For a file that is not a multiple of
|
|
|
|
* the page size, the remaining memory is zeroed when mapped, and
|
|
|
|
* writes to that region are not written out to the file."
|
|
|
|
*/
|
|
|
|
zero_user_segment(page, offset, PAGE_SIZE);
|
|
|
|
do_io:
|
|
|
|
/* Before unlocking the page, transfer reservation to w->io: */
|
|
|
|
old = page_state_cmpxchg(page_state(page), new, {
|
|
|
|
EBUG_ON(!new.reserved &&
|
|
|
|
(new.sectors != PAGE_SECTORS ||
|
|
|
|
new.compressed));
|
|
|
|
|
|
|
|
if (new.reserved)
|
|
|
|
new.nr_replicas = new.reservation_replicas;
|
|
|
|
new.reserved = 0;
|
|
|
|
|
|
|
|
new.compressed |= w->opts.compression != 0;
|
|
|
|
|
|
|
|
new.sectors += new.dirty_sectors;
|
|
|
|
new.dirty_sectors = 0;
|
|
|
|
});
|
|
|
|
|
|
|
|
BUG_ON(PageWriteback(page));
|
|
|
|
set_page_writeback(page);
|
|
|
|
unlock_page(page);
|
|
|
|
|
|
|
|
if (w->io &&
|
|
|
|
(w->io->op.op.res.nr_replicas != new.nr_replicas ||
|
|
|
|
!bio_can_add_page_contig(&w->io->op.op.wbio.bio, page)))
|
|
|
|
bch2_writepage_do_io(w);
|
|
|
|
|
|
|
|
if (!w->io)
|
|
|
|
bch2_writepage_io_alloc(c, w, inode, page, new.nr_replicas);
|
|
|
|
|
|
|
|
w->io->new_sectors += new.sectors - old.sectors;
|
|
|
|
|
|
|
|
BUG_ON(inode != w->io->op.inode);
|
|
|
|
BUG_ON(bio_add_page_contig(&w->io->op.op.wbio.bio, page));
|
|
|
|
|
|
|
|
if (old.reserved)
|
|
|
|
w->io->op.op.res.sectors += old.reservation_replicas * PAGE_SECTORS;
|
|
|
|
|
|
|
|
w->io->op.new_i_size = i_size;
|
|
|
|
|
|
|
|
if (wbc->sync_mode == WB_SYNC_ALL)
|
|
|
|
w->io->op.op.wbio.bio.bi_opf |= REQ_SYNC;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
int bch2_writepages(struct address_space *mapping, struct writeback_control *wbc)
|
|
|
|
{
|
|
|
|
struct bch_fs *c = mapping->host->i_sb->s_fs_info;
|
|
|
|
struct bch_writepage_state w =
|
|
|
|
bch_writepage_state_init(c, to_bch_ei(mapping->host));
|
|
|
|
struct blk_plug plug;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
blk_start_plug(&plug);
|
|
|
|
ret = write_cache_pages(mapping, wbc, __bch2_writepage, &w);
|
|
|
|
if (w.io)
|
|
|
|
bch2_writepage_do_io(&w);
|
|
|
|
blk_finish_plug(&plug);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
int bch2_writepage(struct page *page, struct writeback_control *wbc)
|
|
|
|
{
|
|
|
|
struct bch_fs *c = page->mapping->host->i_sb->s_fs_info;
|
|
|
|
struct bch_writepage_state w =
|
|
|
|
bch_writepage_state_init(c, to_bch_ei(page->mapping->host));
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
ret = __bch2_writepage(page_folio(page), wbc, &w);
|
|
|
|
if (w.io)
|
|
|
|
bch2_writepage_do_io(&w);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* buffered writes: */
|
|
|
|
|
|
|
|
int bch2_write_begin(struct file *file, struct address_space *mapping,
|
|
|
|
loff_t pos, unsigned len,
|
|
|
|
struct page **pagep, void **fsdata)
|
|
|
|
{
|
|
|
|
struct bch_inode_info *inode = to_bch_ei(mapping->host);
|
|
|
|
struct bch_fs *c = inode->v.i_sb->s_fs_info;
|
|
|
|
pgoff_t index = pos >> PAGE_SHIFT;
|
|
|
|
unsigned offset = pos & (PAGE_SIZE - 1);
|
|
|
|
struct page *page;
|
|
|
|
int ret = -ENOMEM;
|
|
|
|
|
|
|
|
BUG_ON(inode_unhashed(&inode->v));
|
|
|
|
|
|
|
|
bch2_pagecache_add_get(&inode->ei_pagecache_lock);
|
|
|
|
|
|
|
|
page = grab_cache_page_write_begin(mapping, index);
|
|
|
|
if (!page)
|
|
|
|
goto err_unlock;
|
|
|
|
|
|
|
|
if (PageUptodate(page))
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
/* If we're writing entire page, don't need to read it in first: */
|
|
|
|
if (len == PAGE_SIZE)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
if (!offset && pos + len >= inode->v.i_size) {
|
|
|
|
zero_user_segment(page, len, PAGE_SIZE);
|
|
|
|
flush_dcache_page(page);
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (index > inode->v.i_size >> PAGE_SHIFT) {
|
|
|
|
zero_user_segments(page, 0, offset, offset + len, PAGE_SIZE);
|
|
|
|
flush_dcache_page(page);
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
readpage:
|
|
|
|
ret = bch2_read_single_page(page, mapping);
|
|
|
|
if (ret)
|
|
|
|
goto err;
|
|
|
|
out:
|
|
|
|
ret = bch2_get_page_reservation(c, inode, page, true);
|
|
|
|
if (ret) {
|
|
|
|
if (!PageUptodate(page)) {
|
|
|
|
/*
|
|
|
|
* If the page hasn't been read in, we won't know if we
|
|
|
|
* actually need a reservation - we don't actually need
|
|
|
|
* to read here, we just need to check if the page is
|
|
|
|
* fully backed by uncompressed data:
|
|
|
|
*/
|
|
|
|
goto readpage;
|
|
|
|
}
|
|
|
|
|
|
|
|
goto err;
|
|
|
|
}
|
|
|
|
|
|
|
|
*pagep = page;
|
|
|
|
return 0;
|
|
|
|
err:
|
|
|
|
unlock_page(page);
|
|
|
|
put_page(page);
|
|
|
|
*pagep = NULL;
|
|
|
|
err_unlock:
|
|
|
|
bch2_pagecache_add_put(&inode->ei_pagecache_lock);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
int bch2_write_end(struct file *file, struct address_space *mapping,
|
|
|
|
loff_t pos, unsigned len, unsigned copied,
|
|
|
|
struct page *page, void *fsdata)
|
|
|
|
{
|
|
|
|
struct bch_inode_info *inode = to_bch_ei(mapping->host);
|
|
|
|
struct bch_fs *c = inode->v.i_sb->s_fs_info;
|
|
|
|
|
|
|
|
lockdep_assert_held(&inode->v.i_rwsem);
|
|
|
|
|
|
|
|
if (unlikely(copied < len && !PageUptodate(page))) {
|
|
|
|
/*
|
|
|
|
* The page needs to be read in, but that would destroy
|
|
|
|
* our partial write - simplest thing is to just force
|
|
|
|
* userspace to redo the write:
|
|
|
|
*/
|
|
|
|
zero_user(page, 0, PAGE_SIZE);
|
|
|
|
flush_dcache_page(page);
|
|
|
|
copied = 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
spin_lock(&inode->v.i_lock);
|
|
|
|
if (pos + copied > inode->v.i_size)
|
|
|
|
i_size_write(&inode->v, pos + copied);
|
|
|
|
spin_unlock(&inode->v.i_lock);
|
|
|
|
|
|
|
|
if (copied) {
|
|
|
|
if (!PageUptodate(page))
|
|
|
|
SetPageUptodate(page);
|
|
|
|
if (!PageDirty(page))
|
|
|
|
set_page_dirty(page);
|
|
|
|
|
|
|
|
inode->ei_last_dirtied = (unsigned long) current;
|
|
|
|
} else {
|
|
|
|
bch2_put_page_reservation(c, inode, page);
|
|
|
|
}
|
|
|
|
|
|
|
|
unlock_page(page);
|
|
|
|
put_page(page);
|
|
|
|
bch2_pagecache_add_put(&inode->ei_pagecache_lock);
|
|
|
|
|
|
|
|
return copied;
|
|
|
|
}
|
|
|
|
|
|
|
|
#define WRITE_BATCH_PAGES 32
|
|
|
|
|
|
|
|
static int __bch2_buffered_write(struct bch_inode_info *inode,
|
|
|
|
struct address_space *mapping,
|
|
|
|
struct iov_iter *iter,
|
|
|
|
loff_t pos, unsigned len)
|
|
|
|
{
|
|
|
|
struct bch_fs *c = inode->v.i_sb->s_fs_info;
|
|
|
|
struct page *pages[WRITE_BATCH_PAGES];
|
|
|
|
unsigned long index = pos >> PAGE_SHIFT;
|
|
|
|
unsigned offset = pos & (PAGE_SIZE - 1);
|
|
|
|
unsigned nr_pages = DIV_ROUND_UP(offset + len, PAGE_SIZE);
|
|
|
|
unsigned i, copied = 0, nr_pages_copied = 0;
|
|
|
|
int ret = 0;
|
|
|
|
|
|
|
|
BUG_ON(!len);
|
|
|
|
BUG_ON(nr_pages > ARRAY_SIZE(pages));
|
|
|
|
|
|
|
|
for (i = 0; i < nr_pages; i++) {
|
|
|
|
pages[i] = grab_cache_page_write_begin(mapping, index + i);
|
|
|
|
if (!pages[i]) {
|
|
|
|
nr_pages = i;
|
|
|
|
ret = -ENOMEM;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (offset && !PageUptodate(pages[0])) {
|
|
|
|
ret = bch2_read_single_page(pages[0], mapping);
|
|
|
|
if (ret)
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
if ((pos + len) & (PAGE_SIZE - 1) &&
|
|
|
|
!PageUptodate(pages[nr_pages - 1])) {
|
|
|
|
if ((index + nr_pages - 1) << PAGE_SHIFT >= inode->v.i_size) {
|
|
|
|
zero_user(pages[nr_pages - 1], 0, PAGE_SIZE);
|
|
|
|
} else {
|
|
|
|
ret = bch2_read_single_page(pages[nr_pages - 1], mapping);
|
|
|
|
if (ret)
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
for (i = 0; i < nr_pages; i++) {
|
|
|
|
ret = bch2_get_page_reservation(c, inode, pages[i], true);
|
|
|
|
|
|
|
|
if (ret && !PageUptodate(pages[i])) {
|
|
|
|
ret = bch2_read_single_page(pages[i], mapping);
|
|
|
|
if (ret)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
ret = bch2_get_page_reservation(c, inode, pages[i], true);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (ret)
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (mapping_writably_mapped(mapping))
|
|
|
|
for (i = 0; i < nr_pages; i++)
|
|
|
|
flush_dcache_page(pages[i]);
|
|
|
|
|
|
|
|
while (copied < len) {
|
|
|
|
struct page *page = pages[(offset + copied) >> PAGE_SHIFT];
|
|
|
|
unsigned pg_offset = (offset + copied) & (PAGE_SIZE - 1);
|
|
|
|
unsigned pg_bytes = min_t(unsigned, len - copied,
|
|
|
|
PAGE_SIZE - pg_offset);
|
|
|
|
unsigned pg_copied = copy_page_from_iter_atomic(page,
|
|
|
|
pg_offset, pg_bytes, iter);
|
|
|
|
|
|
|
|
flush_dcache_page(page);
|
|
|
|
copied += pg_copied;
|
|
|
|
|
|
|
|
if (pg_copied != pg_bytes)
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!copied)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
nr_pages_copied = DIV_ROUND_UP(offset + copied, PAGE_SIZE);
|
|
|
|
inode->ei_last_dirtied = (unsigned long) current;
|
|
|
|
|
|
|
|
spin_lock(&inode->v.i_lock);
|
|
|
|
if (pos + copied > inode->v.i_size)
|
|
|
|
i_size_write(&inode->v, pos + copied);
|
|
|
|
spin_unlock(&inode->v.i_lock);
|
|
|
|
|
|
|
|
if (copied < len &&
|
|
|
|
((offset + copied) & (PAGE_SIZE - 1))) {
|
|
|
|
struct page *page = pages[(offset + copied) >> PAGE_SHIFT];
|
|
|
|
|
|
|
|
if (!PageUptodate(page)) {
|
|
|
|
zero_user(page, 0, PAGE_SIZE);
|
|
|
|
copied -= (offset + copied) & (PAGE_SIZE - 1);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
out:
|
|
|
|
for (i = 0; i < nr_pages_copied; i++) {
|
|
|
|
if (!PageUptodate(pages[i]))
|
|
|
|
SetPageUptodate(pages[i]);
|
|
|
|
if (!PageDirty(pages[i]))
|
|
|
|
set_page_dirty(pages[i]);
|
|
|
|
unlock_page(pages[i]);
|
|
|
|
put_page(pages[i]);
|
|
|
|
}
|
|
|
|
|
|
|
|
for (i = nr_pages_copied; i < nr_pages; i++) {
|
|
|
|
if (!PageDirty(pages[i]))
|
|
|
|
bch2_put_page_reservation(c, inode, pages[i]);
|
|
|
|
unlock_page(pages[i]);
|
|
|
|
put_page(pages[i]);
|
|
|
|
}
|
|
|
|
|
|
|
|
return copied ?: ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t bch2_buffered_write(struct kiocb *iocb, struct iov_iter *iter)
|
|
|
|
{
|
|
|
|
struct file *file = iocb->ki_filp;
|
|
|
|
struct address_space *mapping = file->f_mapping;
|
|
|
|
struct bch_inode_info *inode = file_bch_inode(file);
|
|
|
|
loff_t pos = iocb->ki_pos;
|
|
|
|
ssize_t written = 0;
|
|
|
|
int ret = 0;
|
|
|
|
|
|
|
|
bch2_pagecache_add_get(&inode->ei_pagecache_lock);
|
|
|
|
|
|
|
|
do {
|
|
|
|
unsigned offset = pos & (PAGE_SIZE - 1);
|
|
|
|
unsigned bytes = min_t(unsigned long, iov_iter_count(iter),
|
|
|
|
PAGE_SIZE * WRITE_BATCH_PAGES - offset);
|
|
|
|
again:
|
|
|
|
/*
|
|
|
|
* Bring in the user page that we will copy from _first_.
|
|
|
|
* Otherwise there's a nasty deadlock on copying from the
|
|
|
|
* same page as we're writing to, without it being marked
|
|
|
|
* up-to-date.
|
|
|
|
*
|
|
|
|
* Not only is this an optimisation, but it is also required
|
|
|
|
* to check that the address is actually valid, when atomic
|
|
|
|
* usercopies are used, below.
|
|
|
|
*/
|
|
|
|
if (unlikely(fault_in_iov_iter_readable(iter, bytes))) {
|
|
|
|
bytes = min_t(unsigned long, iov_iter_count(iter),
|
|
|
|
PAGE_SIZE - offset);
|
|
|
|
|
|
|
|
if (unlikely(fault_in_iov_iter_readable(iter, bytes))) {
|
|
|
|
ret = -EFAULT;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (unlikely(fatal_signal_pending(current))) {
|
|
|
|
ret = -EINTR;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
ret = __bch2_buffered_write(inode, mapping, iter, pos, bytes);
|
|
|
|
if (unlikely(ret < 0))
|
|
|
|
break;
|
|
|
|
|
|
|
|
cond_resched();
|
|
|
|
|
|
|
|
if (unlikely(ret == 0)) {
|
|
|
|
/*
|
|
|
|
* If we were unable to copy any data at all, we must
|
|
|
|
* fall back to a single segment length write.
|
|
|
|
*
|
|
|
|
* If we didn't fallback here, we could livelock
|
|
|
|
* because not all segments in the iov can be copied at
|
|
|
|
* once without a pagefault.
|
|
|
|
*/
|
|
|
|
bytes = min_t(unsigned long, PAGE_SIZE - offset,
|
|
|
|
iov_iter_single_seg_count(iter));
|
|
|
|
goto again;
|
|
|
|
}
|
|
|
|
pos += ret;
|
|
|
|
written += ret;
|
|
|
|
|
|
|
|
balance_dirty_pages_ratelimited(mapping);
|
|
|
|
} while (iov_iter_count(iter));
|
|
|
|
|
|
|
|
bch2_pagecache_add_put(&inode->ei_pagecache_lock);
|
|
|
|
|
|
|
|
return written ? written : ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* O_DIRECT reads */
|
|
|
|
|
|
|
|
static void bch2_dio_read_complete(struct closure *cl)
|
|
|
|
{
|
|
|
|
struct dio_read *dio = container_of(cl, struct dio_read, cl);
|
|
|
|
|
|
|
|
dio->req->ki_complete(dio->req, dio->ret);
|
|
|
|
bio_check_pages_dirty(&dio->rbio.bio); /* transfers ownership */
|
|
|
|
}
|
|
|
|
|
|
|
|
static void bch2_direct_IO_read_endio(struct bio *bio)
|
|
|
|
{
|
|
|
|
struct dio_read *dio = bio->bi_private;
|
|
|
|
|
|
|
|
if (bio->bi_status)
|
|
|
|
dio->ret = blk_status_to_errno(bio->bi_status);
|
|
|
|
|
|
|
|
closure_put(&dio->cl);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void bch2_direct_IO_read_split_endio(struct bio *bio)
|
|
|
|
{
|
|
|
|
bch2_direct_IO_read_endio(bio);
|
|
|
|
bio_check_pages_dirty(bio); /* transfers ownership */
|
|
|
|
}
|
|
|
|
|
|
|
|
static int bch2_direct_IO_read(struct kiocb *req, struct iov_iter *iter)
|
|
|
|
{
|
|
|
|
struct file *file = req->ki_filp;
|
|
|
|
struct bch_inode_info *inode = file_bch_inode(file);
|
|
|
|
struct bch_fs *c = inode->v.i_sb->s_fs_info;
|
|
|
|
struct bch_io_opts opts = io_opts(c, inode);
|
|
|
|
struct dio_read *dio;
|
|
|
|
struct bio *bio;
|
|
|
|
loff_t offset = req->ki_pos;
|
|
|
|
bool sync = is_sync_kiocb(req);
|
|
|
|
size_t shorten;
|
|
|
|
ssize_t ret;
|
|
|
|
|
|
|
|
if ((offset|iter->count) & (block_bytes(c) - 1))
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
ret = min_t(loff_t, iter->count,
|
|
|
|
max_t(loff_t, 0, i_size_read(&inode->v) - offset));
|
|
|
|
|
|
|
|
if (!ret)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
shorten = iov_iter_count(iter) - round_up(ret, block_bytes(c));
|
|
|
|
iter->count -= shorten;
|
|
|
|
|
|
|
|
bio = bio_alloc_bioset(NULL,
|
|
|
|
iov_iter_npages(iter, BIO_MAX_VECS),
|
|
|
|
REQ_OP_READ,
|
|
|
|
GFP_KERNEL,
|
|
|
|
&c->dio_read_bioset);
|
|
|
|
|
|
|
|
bio->bi_end_io = bch2_direct_IO_read_endio;
|
|
|
|
|
|
|
|
dio = container_of(bio, struct dio_read, rbio.bio);
|
|
|
|
closure_init(&dio->cl, NULL);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* this is a _really_ horrible hack just to avoid an atomic sub at the
|
|
|
|
* end:
|
|
|
|
*/
|
|
|
|
if (!sync) {
|
|
|
|
set_closure_fn(&dio->cl, bch2_dio_read_complete, NULL);
|
|
|
|
atomic_set(&dio->cl.remaining,
|
|
|
|
CLOSURE_REMAINING_INITIALIZER -
|
|
|
|
CLOSURE_RUNNING +
|
|
|
|
CLOSURE_DESTRUCTOR);
|
|
|
|
} else {
|
|
|
|
atomic_set(&dio->cl.remaining,
|
|
|
|
CLOSURE_REMAINING_INITIALIZER + 1);
|
|
|
|
}
|
|
|
|
|
|
|
|
dio->req = req;
|
|
|
|
dio->ret = ret;
|
|
|
|
|
|
|
|
goto start;
|
|
|
|
while (iter->count) {
|
|
|
|
bio = bio_alloc_bioset(NULL,
|
|
|
|
iov_iter_npages(iter, BIO_MAX_VECS),
|
|
|
|
REQ_OP_READ,
|
|
|
|
GFP_KERNEL,
|
|
|
|
&c->bio_read);
|
|
|
|
bio->bi_end_io = bch2_direct_IO_read_split_endio;
|
|
|
|
start:
|
|
|
|
bio->bi_opf = REQ_OP_READ|REQ_SYNC;
|
|
|
|
bio->bi_iter.bi_sector = offset >> 9;
|
|
|
|
bio->bi_private = dio;
|
|
|
|
|
|
|
|
ret = bio_iov_iter_get_pages(bio, iter);
|
|
|
|
if (ret < 0) {
|
|
|
|
/* XXX: fault inject this path */
|
|
|
|
bio->bi_status = BLK_STS_RESOURCE;
|
|
|
|
bio_endio(bio);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
offset += bio->bi_iter.bi_size;
|
|
|
|
bio_set_pages_dirty(bio);
|
|
|
|
|
|
|
|
if (iter->count)
|
|
|
|
closure_get(&dio->cl);
|
|
|
|
|
|
|
|
bch2_read(c, rbio_init(bio, opts), inode->v.i_ino);
|
|
|
|
}
|
|
|
|
|
|
|
|
iter->count += shorten;
|
|
|
|
|
|
|
|
if (sync) {
|
|
|
|
closure_sync(&dio->cl);
|
|
|
|
closure_debug_destroy(&dio->cl);
|
|
|
|
ret = dio->ret;
|
|
|
|
bio_check_pages_dirty(&dio->rbio.bio); /* transfers ownership */
|
|
|
|
return ret;
|
|
|
|
} else {
|
|
|
|
return -EIOCBQUEUED;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
ssize_t bch2_read_iter(struct kiocb *iocb, struct iov_iter *iter)
|
|
|
|
{
|
|
|
|
struct file *file = iocb->ki_filp;
|
|
|
|
struct bch_inode_info *inode = file_bch_inode(file);
|
|
|
|
struct address_space *mapping = file->f_mapping;
|
|
|
|
size_t count = iov_iter_count(iter);
|
|
|
|
ssize_t ret;
|
|
|
|
|
|
|
|
if (!count)
|
|
|
|
return 0; /* skip atime */
|
|
|
|
|
|
|
|
if (iocb->ki_flags & IOCB_DIRECT) {
|
|
|
|
struct blk_plug plug;
|
|
|
|
|
|
|
|
ret = filemap_write_and_wait_range(mapping,
|
|
|
|
iocb->ki_pos,
|
|
|
|
iocb->ki_pos + count - 1);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
file_accessed(file);
|
|
|
|
|
|
|
|
blk_start_plug(&plug);
|
|
|
|
ret = bch2_direct_IO_read(iocb, iter);
|
|
|
|
blk_finish_plug(&plug);
|
|
|
|
|
|
|
|
if (ret >= 0)
|
|
|
|
iocb->ki_pos += ret;
|
|
|
|
} else {
|
|
|
|
bch2_pagecache_add_get(&inode->ei_pagecache_lock);
|
|
|
|
ret = generic_file_read_iter(iocb, iter);
|
|
|
|
bch2_pagecache_add_put(&inode->ei_pagecache_lock);
|
|
|
|
}
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* O_DIRECT writes */
|
|
|
|
|
|
|
|
/*
|
|
|
|
* We're going to return -EIOCBQUEUED, but we haven't finished consuming the
|
|
|
|
* iov_iter yet, so we need to stash a copy of the iovec: it might be on the
|
|
|
|
* caller's stack, we're not guaranteed that it will live for the duration of
|
|
|
|
* the IO:
|
|
|
|
*/
|
|
|
|
static noinline int bch2_dio_write_copy_iov(struct dio_write *dio)
|
|
|
|
{
|
|
|
|
struct iovec *iov = dio->inline_vecs;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* iov_iter has a single embedded iovec - nothing to do:
|
|
|
|
*/
|
|
|
|
if (iter_is_ubuf(&dio->iter))
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* We don't currently handle non-iovec iov_iters here - return an error,
|
|
|
|
* and we'll fall back to doing the IO synchronously:
|
|
|
|
*/
|
|
|
|
if (!iter_is_iovec(&dio->iter))
|
|
|
|
return -1;
|
|
|
|
|
|
|
|
if (dio->iter.nr_segs > ARRAY_SIZE(dio->inline_vecs)) {
|
|
|
|
iov = kmalloc_array(dio->iter.nr_segs, sizeof(*iov),
|
|
|
|
GFP_KERNEL);
|
|
|
|
if (unlikely(!iov))
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
dio->free_iov = true;
|
|
|
|
}
|
|
|
|
|
|
|
|
memcpy(iov, dio->iter.__iov, dio->iter.nr_segs * sizeof(*iov));
|
|
|
|
dio->iter.__iov = iov;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void bch2_dio_write_loop_async(struct closure *);
|
|
|
|
|
|
|
|
static long bch2_dio_write_loop(struct dio_write *dio)
|
|
|
|
{
|
|
|
|
struct kiocb *req = dio->req;
|
|
|
|
struct address_space *mapping = req->ki_filp->f_mapping;
|
|
|
|
struct bch_inode_info *inode = dio->iop.inode;
|
|
|
|
struct bio *bio = &dio->iop.op.wbio.bio;
|
|
|
|
struct bvec_iter_all iter;
|
|
|
|
struct bio_vec *bv;
|
|
|
|
bool sync;
|
|
|
|
long ret;
|
|
|
|
|
|
|
|
if (dio->loop)
|
|
|
|
goto loop;
|
|
|
|
|
|
|
|
inode_dio_begin(&inode->v);
|
|
|
|
bch2_pagecache_block_get(&inode->ei_pagecache_lock);
|
|
|
|
|
|
|
|
/* Write and invalidate pagecache range that we're writing to: */
|
|
|
|
ret = write_invalidate_inode_pages_range(mapping, req->ki_pos,
|
|
|
|
req->ki_pos + iov_iter_count(&dio->iter) - 1);
|
|
|
|
if (unlikely(ret))
|
|
|
|
goto err;
|
|
|
|
|
|
|
|
while (1) {
|
|
|
|
if (current != dio->task)
|
|
|
|
kthread_use_mm(dio->task->mm);
|
|
|
|
BUG_ON(current->faults_disabled_mapping);
|
|
|
|
current->faults_disabled_mapping = mapping;
|
|
|
|
|
|
|
|
ret = bio_iov_iter_get_pages(bio, &dio->iter);
|
|
|
|
|
|
|
|
current->faults_disabled_mapping = NULL;
|
|
|
|
if (current != dio->task)
|
|
|
|
kthread_unuse_mm(dio->task->mm);
|
|
|
|
|
|
|
|
if (unlikely(ret < 0))
|
|
|
|
goto err;
|
|
|
|
|
|
|
|
/* gup might have faulted pages back in: */
|
|
|
|
ret = write_invalidate_inode_pages_range(mapping,
|
|
|
|
req->ki_pos + (dio->iop.op.written << 9),
|
|
|
|
req->ki_pos + iov_iter_count(&dio->iter) - 1);
|
|
|
|
if (unlikely(ret))
|
|
|
|
goto err;
|
|
|
|
|
|
|
|
dio->iop.op.pos = POS(inode->v.i_ino,
|
|
|
|
(req->ki_pos >> 9) + dio->iop.op.written);
|
|
|
|
|
|
|
|
task_io_account_write(bio->bi_iter.bi_size);
|
|
|
|
|
|
|
|
closure_call(&dio->iop.op.cl, bch2_write, NULL, &dio->cl);
|
|
|
|
|
|
|
|
if (!dio->sync && !dio->loop && dio->iter.count) {
|
|
|
|
if (bch2_dio_write_copy_iov(dio)) {
|
|
|
|
dio->iop.op.error = -ENOMEM;
|
|
|
|
goto err_wait_io;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
err_wait_io:
|
|
|
|
dio->loop = true;
|
|
|
|
|
|
|
|
if (!dio->sync) {
|
|
|
|
continue_at(&dio->cl, bch2_dio_write_loop_async, NULL);
|
|
|
|
return -EIOCBQUEUED;
|
|
|
|
}
|
|
|
|
|
|
|
|
closure_sync(&dio->cl);
|
|
|
|
loop:
|
|
|
|
bio_for_each_segment_all(bv, bio, iter)
|
|
|
|
put_page(bv->bv_page);
|
|
|
|
if (!dio->iter.count || dio->iop.op.error)
|
|
|
|
break;
|
|
|
|
bio_reset(bio, NULL, REQ_OP_WRITE);
|
|
|
|
}
|
|
|
|
|
|
|
|
ret = dio->iop.op.error ?: ((long) dio->iop.op.written << 9);
|
|
|
|
err:
|
|
|
|
bch2_pagecache_block_put(&inode->ei_pagecache_lock);
|
|
|
|
bch2_disk_reservation_put(dio->iop.op.c, &dio->iop.op.res);
|
|
|
|
bch2_quota_reservation_put(dio->iop.op.c, inode, &dio->quota_res);
|
|
|
|
|
|
|
|
if (dio->free_iov)
|
|
|
|
kfree(dio->iter.__iov);
|
|
|
|
|
|
|
|
closure_debug_destroy(&dio->cl);
|
|
|
|
|
|
|
|
sync = dio->sync;
|
|
|
|
bio_put(bio);
|
|
|
|
|
|
|
|
/* inode->i_dio_count is our ref on inode and thus bch_fs */
|
|
|
|
inode_dio_end(&inode->v);
|
|
|
|
|
|
|
|
if (!sync) {
|
|
|
|
req->ki_complete(req, ret);
|
|
|
|
ret = -EIOCBQUEUED;
|
|
|
|
}
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void bch2_dio_write_loop_async(struct closure *cl)
|
|
|
|
{
|
|
|
|
struct dio_write *dio = container_of(cl, struct dio_write, cl);
|
|
|
|
|
|
|
|
bch2_dio_write_loop(dio);
|
|
|
|
}
|
|
|
|
|
|
|
|
static noinline
|
|
|
|
ssize_t bch2_direct_write(struct kiocb *req, struct iov_iter *iter)
|
|
|
|
{
|
|
|
|
struct file *file = req->ki_filp;
|
|
|
|
struct bch_inode_info *inode = file_bch_inode(file);
|
|
|
|
struct bch_fs *c = inode->v.i_sb->s_fs_info;
|
|
|
|
struct dio_write *dio;
|
|
|
|
struct bio *bio;
|
|
|
|
loff_t offset = req->ki_pos;
|
|
|
|
ssize_t ret;
|
|
|
|
|
|
|
|
lockdep_assert_held(&inode->v.i_rwsem);
|
|
|
|
|
|
|
|
if (unlikely(!iter->count))
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
if (unlikely((offset|iter->count) & (block_bytes(c) - 1)))
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
bio = bio_alloc_bioset(NULL,
|
|
|
|
iov_iter_npages(iter, BIO_MAX_VECS),
|
|
|
|
REQ_OP_WRITE,
|
|
|
|
GFP_KERNEL,
|
|
|
|
&c->dio_write_bioset);
|
|
|
|
dio = container_of(bio, struct dio_write, iop.op.wbio.bio);
|
|
|
|
closure_init(&dio->cl, NULL);
|
|
|
|
dio->req = req;
|
|
|
|
dio->task = current;
|
|
|
|
dio->loop = false;
|
|
|
|
dio->sync = is_sync_kiocb(req) ||
|
|
|
|
offset + iter->count > inode->v.i_size;
|
|
|
|
dio->free_iov = false;
|
|
|
|
dio->quota_res.sectors = 0;
|
|
|
|
dio->iter = *iter;
|
|
|
|
bch2_fswrite_op_init(&dio->iop, c, inode, io_opts(c, inode), true);
|
|
|
|
dio->iop.op.write_point = writepoint_hashed((unsigned long) dio->task);
|
|
|
|
dio->iop.op.flags |= BCH_WRITE_NOPUT_RESERVATION;
|
|
|
|
|
|
|
|
if ((req->ki_flags & IOCB_DSYNC) &&
|
|
|
|
!c->opts.journal_flush_disabled)
|
|
|
|
dio->iop.op.flags |= BCH_WRITE_FLUSH;
|
|
|
|
|
|
|
|
ret = bch2_quota_reservation_add(c, inode, &dio->quota_res,
|
|
|
|
iter->count >> 9, true);
|
|
|
|
if (unlikely(ret))
|
|
|
|
goto err;
|
|
|
|
|
|
|
|
ret = bch2_disk_reservation_get(c, &dio->iop.op.res, iter->count >> 9,
|
|
|
|
dio->iop.op.opts.data_replicas, 0);
|
|
|
|
if (unlikely(ret)) {
|
|
|
|
if (bch2_check_range_allocated(c, POS(inode->v.i_ino,
|
|
|
|
offset >> 9),
|
|
|
|
iter->count >> 9))
|
|
|
|
goto err;
|
|
|
|
|
|
|
|
dio->iop.unalloc = true;
|
|
|
|
}
|
|
|
|
|
|
|
|
dio->iop.op.nr_replicas = dio->iop.op.res.nr_replicas;
|
|
|
|
|
|
|
|
return bch2_dio_write_loop(dio);
|
|
|
|
err:
|
|
|
|
bch2_disk_reservation_put(c, &dio->iop.op.res);
|
|
|
|
bch2_quota_reservation_put(c, inode, &dio->quota_res);
|
|
|
|
closure_debug_destroy(&dio->cl);
|
|
|
|
bio_put(bio);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t __bch2_write_iter(struct kiocb *iocb, struct iov_iter *from)
|
|
|
|
{
|
|
|
|
struct file *file = iocb->ki_filp;
|
|
|
|
ssize_t ret;
|
|
|
|
|
|
|
|
if (iocb->ki_flags & IOCB_DIRECT)
|
|
|
|
return bch2_direct_write(iocb, from);
|
|
|
|
|
|
|
|
ret = file_remove_privs(file);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
ret = file_update_time(file);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
ret = iocb->ki_flags & IOCB_DIRECT
|
|
|
|
? bch2_direct_write(iocb, from)
|
|
|
|
: bch2_buffered_write(iocb, from);
|
|
|
|
|
|
|
|
if (likely(ret > 0))
|
|
|
|
iocb->ki_pos += ret;
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
ssize_t bch2_write_iter(struct kiocb *iocb, struct iov_iter *from)
|
|
|
|
{
|
|
|
|
struct bch_inode_info *inode = file_bch_inode(iocb->ki_filp);
|
|
|
|
bool direct = iocb->ki_flags & IOCB_DIRECT;
|
|
|
|
ssize_t ret;
|
|
|
|
|
|
|
|
inode_lock(&inode->v);
|
|
|
|
ret = generic_write_checks(iocb, from);
|
|
|
|
if (ret > 0)
|
|
|
|
ret = __bch2_write_iter(iocb, from);
|
|
|
|
inode_unlock(&inode->v);
|
|
|
|
|
|
|
|
if (ret > 0 && !direct)
|
|
|
|
ret = generic_write_sync(iocb, ret);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* fsync: */
|
|
|
|
|
|
|
|
int bch2_fsync(struct file *file, loff_t start, loff_t end, int datasync)
|
|
|
|
{
|
|
|
|
struct bch_inode_info *inode = file_bch_inode(file);
|
|
|
|
struct bch_fs *c = inode->v.i_sb->s_fs_info;
|
2018-07-23 11:53:29 +00:00
|
|
|
int ret, ret2;
|
2017-03-17 06:18:50 +00:00
|
|
|
|
|
|
|
ret = file_write_and_wait_range(file, start, end);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
if (datasync && !(inode->v.i_state & I_DIRTY_DATASYNC))
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
ret = sync_inode_metadata(&inode->v, 1);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
out:
|
|
|
|
if (c->opts.journal_flush_disabled)
|
|
|
|
return 0;
|
|
|
|
|
2018-07-23 11:53:29 +00:00
|
|
|
ret = bch2_journal_flush_seq(&c->journal, inode->ei_journal_seq);
|
|
|
|
ret2 = file_check_and_advance_wb_err(file);
|
|
|
|
|
|
|
|
return ret ?: ret2;
|
2017-03-17 06:18:50 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/* truncate: */
|
|
|
|
|
2018-08-09 01:09:31 +00:00
|
|
|
static int __bch2_fpunch(struct bch_fs *c, struct bch_inode_info *inode,
|
|
|
|
u64 start_offset, u64 end_offset, u64 *journal_seq)
|
|
|
|
{
|
|
|
|
struct bpos start = POS(inode->v.i_ino, start_offset);
|
|
|
|
struct bpos end = POS(inode->v.i_ino, end_offset);
|
|
|
|
unsigned max_sectors = KEY_SIZE_MAX & (~0 << c->block_bits);
|
|
|
|
struct btree_trans trans;
|
|
|
|
struct btree_iter *iter;
|
|
|
|
struct bkey_s_c k;
|
|
|
|
int ret = 0;
|
|
|
|
|
|
|
|
bch2_trans_init(&trans, c);
|
|
|
|
bch2_trans_preload_iters(&trans);
|
|
|
|
|
|
|
|
iter = bch2_trans_get_iter(&trans, BTREE_ID_EXTENTS, start,
|
|
|
|
BTREE_ITER_INTENT);
|
|
|
|
|
|
|
|
while ((k = bch2_btree_iter_peek(iter)).k &&
|
|
|
|
!(ret = btree_iter_err(k)) &&
|
|
|
|
bkey_cmp(iter->pos, end) < 0) {
|
|
|
|
struct disk_reservation disk_res =
|
|
|
|
bch2_disk_reservation_init(c, 0);
|
|
|
|
struct bkey_i delete;
|
|
|
|
|
|
|
|
bkey_init(&delete.k);
|
|
|
|
delete.k.p = iter->pos;
|
|
|
|
|
|
|
|
/* create the biggest key we can */
|
|
|
|
bch2_key_resize(&delete.k, max_sectors);
|
|
|
|
bch2_cut_back(end, &delete.k);
|
|
|
|
|
|
|
|
ret = bch2_extent_update(&trans, inode,
|
|
|
|
&disk_res, NULL, iter, &delete,
|
|
|
|
0, true, true, NULL);
|
|
|
|
bch2_disk_reservation_put(c, &disk_res);
|
|
|
|
|
|
|
|
if (ret == -EINTR)
|
|
|
|
ret = 0;
|
|
|
|
if (ret)
|
|
|
|
break;
|
|
|
|
|
|
|
|
bch2_btree_iter_cond_resched(iter);
|
|
|
|
}
|
|
|
|
|
|
|
|
bch2_trans_exit(&trans);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2017-03-17 06:18:50 +00:00
|
|
|
static inline int range_has_data(struct bch_fs *c,
|
|
|
|
struct bpos start,
|
|
|
|
struct bpos end)
|
|
|
|
{
|
|
|
|
|
|
|
|
struct btree_iter iter;
|
|
|
|
struct bkey_s_c k;
|
|
|
|
int ret = 0;
|
|
|
|
|
|
|
|
for_each_btree_key(&iter, c, BTREE_ID_EXTENTS,
|
|
|
|
start, 0, k) {
|
|
|
|
if (bkey_cmp(bkey_start_pos(k.k), end) >= 0)
|
|
|
|
break;
|
|
|
|
|
|
|
|
if (bkey_extent_is_data(k.k)) {
|
|
|
|
ret = 1;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return bch2_btree_iter_unlock(&iter) ?: ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int __bch2_truncate_page(struct bch_inode_info *inode,
|
|
|
|
pgoff_t index, loff_t start, loff_t end)
|
|
|
|
{
|
|
|
|
struct bch_fs *c = inode->v.i_sb->s_fs_info;
|
|
|
|
struct address_space *mapping = inode->v.i_mapping;
|
|
|
|
unsigned start_offset = start & (PAGE_SIZE - 1);
|
|
|
|
unsigned end_offset = ((end - 1) & (PAGE_SIZE - 1)) + 1;
|
|
|
|
struct page *page;
|
|
|
|
int ret = 0;
|
|
|
|
|
|
|
|
/* Page boundary? Nothing to do */
|
|
|
|
if (!((index == start >> PAGE_SHIFT && start_offset) ||
|
|
|
|
(index == end >> PAGE_SHIFT && end_offset != PAGE_SIZE)))
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
/* Above i_size? */
|
|
|
|
if (index << PAGE_SHIFT >= inode->v.i_size)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
page = find_lock_page(mapping, index);
|
|
|
|
if (!page) {
|
|
|
|
/*
|
|
|
|
* XXX: we're doing two index lookups when we end up reading the
|
|
|
|
* page
|
|
|
|
*/
|
|
|
|
ret = range_has_data(c,
|
|
|
|
POS(inode->v.i_ino, index << PAGE_SECTOR_SHIFT),
|
|
|
|
POS(inode->v.i_ino, (index + 1) << PAGE_SECTOR_SHIFT));
|
|
|
|
if (ret <= 0)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
page = find_or_create_page(mapping, index, GFP_KERNEL);
|
|
|
|
if (unlikely(!page)) {
|
|
|
|
ret = -ENOMEM;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!PageUptodate(page)) {
|
|
|
|
ret = bch2_read_single_page(page, mapping);
|
|
|
|
if (ret)
|
|
|
|
goto unlock;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Bit of a hack - we don't want truncate to fail due to -ENOSPC.
|
|
|
|
*
|
|
|
|
* XXX: because we aren't currently tracking whether the page has actual
|
|
|
|
* data in it (vs. just 0s, or only partially written) this wrong. ick.
|
|
|
|
*/
|
|
|
|
ret = bch2_get_page_reservation(c, inode, page, false);
|
|
|
|
BUG_ON(ret);
|
|
|
|
|
|
|
|
if (index == start >> PAGE_SHIFT &&
|
|
|
|
index == end >> PAGE_SHIFT)
|
|
|
|
zero_user_segment(page, start_offset, end_offset);
|
|
|
|
else if (index == start >> PAGE_SHIFT)
|
|
|
|
zero_user_segment(page, start_offset, PAGE_SIZE);
|
|
|
|
else if (index == end >> PAGE_SHIFT)
|
|
|
|
zero_user_segment(page, 0, end_offset);
|
|
|
|
|
|
|
|
if (!PageDirty(page))
|
|
|
|
set_page_dirty(page);
|
|
|
|
unlock:
|
|
|
|
unlock_page(page);
|
|
|
|
put_page(page);
|
|
|
|
out:
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int bch2_truncate_page(struct bch_inode_info *inode, loff_t from)
|
|
|
|
{
|
|
|
|
return __bch2_truncate_page(inode, from >> PAGE_SHIFT,
|
|
|
|
from, from + PAGE_SIZE);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int bch2_extend(struct bch_inode_info *inode, struct iattr *iattr)
|
|
|
|
{
|
|
|
|
struct bch_fs *c = inode->v.i_sb->s_fs_info;
|
|
|
|
struct address_space *mapping = inode->v.i_mapping;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
ret = filemap_write_and_wait_range(mapping,
|
|
|
|
inode->ei_inode.bi_size, S64_MAX);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
truncate_setsize(&inode->v, iattr->ia_size);
|
|
|
|
/* ATTR_MODE will never be set here, ns argument isn't needed: */
|
|
|
|
setattr_copy(NULL, &inode->v, iattr);
|
|
|
|
|
|
|
|
mutex_lock(&inode->ei_update_lock);
|
2018-07-17 18:12:42 +00:00
|
|
|
ret = bch2_write_inode_size(c, inode, inode->v.i_size,
|
|
|
|
ATTR_MTIME|ATTR_CTIME);
|
2017-03-17 06:18:50 +00:00
|
|
|
mutex_unlock(&inode->ei_update_lock);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2018-08-09 01:09:31 +00:00
|
|
|
static int bch2_truncate_finish_fn(struct bch_inode_info *inode,
|
|
|
|
struct bch_inode_unpacked *bi,
|
|
|
|
void *p)
|
|
|
|
{
|
|
|
|
struct bch_fs *c = inode->v.i_sb->s_fs_info;
|
|
|
|
|
|
|
|
bi->bi_flags &= ~BCH_INODE_I_SIZE_DIRTY;
|
|
|
|
bi->bi_mtime = bi->bi_ctime = bch2_current_time(c);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int bch2_truncate_start_fn(struct bch_inode_info *inode,
|
|
|
|
struct bch_inode_unpacked *bi, void *p)
|
|
|
|
{
|
|
|
|
u64 *new_i_size = p;
|
|
|
|
|
|
|
|
bi->bi_flags |= BCH_INODE_I_SIZE_DIRTY;
|
|
|
|
bi->bi_size = *new_i_size;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2017-03-17 06:18:50 +00:00
|
|
|
int bch2_truncate(struct bch_inode_info *inode, struct iattr *iattr)
|
|
|
|
{
|
|
|
|
struct bch_fs *c = inode->v.i_sb->s_fs_info;
|
|
|
|
struct address_space *mapping = inode->v.i_mapping;
|
2018-08-09 01:09:31 +00:00
|
|
|
u64 new_i_size = iattr->ia_size;
|
2017-03-17 06:18:50 +00:00
|
|
|
bool shrink;
|
|
|
|
int ret = 0;
|
|
|
|
|
|
|
|
inode_dio_wait(&inode->v);
|
|
|
|
bch2_pagecache_block_get(&inode->ei_pagecache_lock);
|
|
|
|
|
|
|
|
BUG_ON(inode->v.i_size < inode->ei_inode.bi_size);
|
|
|
|
|
|
|
|
shrink = iattr->ia_size <= inode->v.i_size;
|
|
|
|
|
|
|
|
if (!shrink) {
|
|
|
|
ret = bch2_extend(inode, iattr);
|
2018-08-09 01:09:31 +00:00
|
|
|
goto err;
|
2017-03-17 06:18:50 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
ret = bch2_truncate_page(inode, iattr->ia_size);
|
|
|
|
if (unlikely(ret))
|
2018-08-09 01:09:31 +00:00
|
|
|
goto err;
|
2017-03-17 06:18:50 +00:00
|
|
|
|
|
|
|
if (iattr->ia_size > inode->ei_inode.bi_size)
|
|
|
|
ret = filemap_write_and_wait_range(mapping,
|
|
|
|
inode->ei_inode.bi_size,
|
|
|
|
iattr->ia_size - 1);
|
|
|
|
else if (iattr->ia_size & (PAGE_SIZE - 1))
|
|
|
|
ret = filemap_write_and_wait_range(mapping,
|
|
|
|
round_down(iattr->ia_size, PAGE_SIZE),
|
|
|
|
iattr->ia_size - 1);
|
|
|
|
if (ret)
|
2018-08-09 01:09:31 +00:00
|
|
|
goto err;
|
2017-03-17 06:18:50 +00:00
|
|
|
|
2018-08-09 01:09:31 +00:00
|
|
|
mutex_lock(&inode->ei_update_lock);
|
|
|
|
ret = bch2_write_inode(c, inode, bch2_truncate_start_fn,
|
|
|
|
&new_i_size, 0);
|
|
|
|
mutex_unlock(&inode->ei_update_lock);
|
2017-03-17 06:18:50 +00:00
|
|
|
|
|
|
|
if (unlikely(ret))
|
2018-08-09 01:09:31 +00:00
|
|
|
goto err;
|
2017-03-17 06:18:50 +00:00
|
|
|
|
|
|
|
truncate_setsize(&inode->v, iattr->ia_size);
|
|
|
|
|
2018-08-09 01:09:31 +00:00
|
|
|
/*
|
|
|
|
* XXX: need a comment explaining why PAGE_SIZE and not block_bytes()
|
|
|
|
* here:
|
|
|
|
*/
|
|
|
|
ret = __bch2_fpunch(c, inode,
|
|
|
|
round_up(iattr->ia_size, PAGE_SIZE) >> 9,
|
|
|
|
U64_MAX, &inode->ei_journal_seq);
|
2017-03-17 06:18:50 +00:00
|
|
|
if (unlikely(ret))
|
2018-08-09 01:09:31 +00:00
|
|
|
goto err;
|
2017-03-17 06:18:50 +00:00
|
|
|
|
|
|
|
/* ATTR_MODE will never be set here, ns argument isn't needed: */
|
|
|
|
setattr_copy(NULL, &inode->v, iattr);
|
2018-08-09 01:09:31 +00:00
|
|
|
|
|
|
|
mutex_lock(&inode->ei_update_lock);
|
|
|
|
ret = bch2_write_inode(c, inode, bch2_truncate_finish_fn, NULL,
|
|
|
|
ATTR_MTIME|ATTR_CTIME);
|
|
|
|
mutex_unlock(&inode->ei_update_lock);
|
|
|
|
err:
|
2017-03-17 06:18:50 +00:00
|
|
|
bch2_pagecache_block_put(&inode->ei_pagecache_lock);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* fallocate: */
|
|
|
|
|
|
|
|
static long bch2_fpunch(struct bch_inode_info *inode, loff_t offset, loff_t len)
|
|
|
|
{
|
|
|
|
struct bch_fs *c = inode->v.i_sb->s_fs_info;
|
|
|
|
u64 discard_start = round_up(offset, PAGE_SIZE) >> 9;
|
|
|
|
u64 discard_end = round_down(offset + len, PAGE_SIZE) >> 9;
|
|
|
|
int ret = 0;
|
|
|
|
|
|
|
|
inode_lock(&inode->v);
|
|
|
|
inode_dio_wait(&inode->v);
|
|
|
|
bch2_pagecache_block_get(&inode->ei_pagecache_lock);
|
|
|
|
|
|
|
|
ret = __bch2_truncate_page(inode,
|
|
|
|
offset >> PAGE_SHIFT,
|
|
|
|
offset, offset + len);
|
|
|
|
if (unlikely(ret))
|
|
|
|
goto err;
|
|
|
|
|
|
|
|
if (offset >> PAGE_SHIFT !=
|
|
|
|
(offset + len) >> PAGE_SHIFT) {
|
|
|
|
ret = __bch2_truncate_page(inode,
|
|
|
|
(offset + len) >> PAGE_SHIFT,
|
|
|
|
offset, offset + len);
|
|
|
|
if (unlikely(ret))
|
|
|
|
goto err;
|
|
|
|
}
|
|
|
|
|
|
|
|
truncate_pagecache_range(&inode->v, offset, offset + len - 1);
|
|
|
|
|
2018-08-09 01:11:43 +00:00
|
|
|
if (discard_start < discard_end)
|
|
|
|
ret = __bch2_fpunch(c, inode, discard_start, discard_end,
|
|
|
|
&inode->ei_journal_seq);
|
2017-03-17 06:18:50 +00:00
|
|
|
err:
|
|
|
|
bch2_pagecache_block_put(&inode->ei_pagecache_lock);
|
|
|
|
inode_unlock(&inode->v);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static long bch2_fcollapse(struct bch_inode_info *inode,
|
|
|
|
loff_t offset, loff_t len)
|
|
|
|
{
|
|
|
|
struct bch_fs *c = inode->v.i_sb->s_fs_info;
|
|
|
|
struct address_space *mapping = inode->v.i_mapping;
|
2018-07-12 23:19:41 +00:00
|
|
|
struct btree_trans trans;
|
|
|
|
struct btree_iter *src, *dst;
|
2017-03-17 06:18:50 +00:00
|
|
|
BKEY_PADDED(k) copy;
|
|
|
|
struct bkey_s_c k;
|
|
|
|
loff_t new_size;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
if ((offset | len) & (block_bytes(c) - 1))
|
|
|
|
return -EINVAL;
|
|
|
|
|
2018-07-12 23:19:41 +00:00
|
|
|
bch2_trans_init(&trans, c);
|
2018-08-11 21:26:11 +00:00
|
|
|
bch2_trans_preload_iters(&trans);
|
2017-03-17 06:18:50 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* We need i_mutex to keep the page cache consistent with the extents
|
|
|
|
* btree, and the btree consistent with i_size - we don't need outside
|
|
|
|
* locking for the extents btree itself, because we're using linked
|
|
|
|
* iterators
|
|
|
|
*/
|
|
|
|
inode_lock(&inode->v);
|
|
|
|
inode_dio_wait(&inode->v);
|
|
|
|
bch2_pagecache_block_get(&inode->ei_pagecache_lock);
|
|
|
|
|
|
|
|
ret = -EINVAL;
|
|
|
|
if (offset + len >= inode->v.i_size)
|
|
|
|
goto err;
|
|
|
|
|
|
|
|
if (inode->v.i_size < len)
|
|
|
|
goto err;
|
|
|
|
|
|
|
|
new_size = inode->v.i_size - len;
|
|
|
|
|
|
|
|
ret = write_invalidate_inode_pages_range(mapping, offset, LLONG_MAX);
|
|
|
|
if (ret)
|
|
|
|
goto err;
|
|
|
|
|
2018-08-11 21:26:11 +00:00
|
|
|
dst = bch2_trans_get_iter(&trans, BTREE_ID_EXTENTS,
|
|
|
|
POS(inode->v.i_ino, offset >> 9),
|
|
|
|
BTREE_ITER_SLOTS|BTREE_ITER_INTENT);
|
|
|
|
BUG_ON(IS_ERR_OR_NULL(dst));
|
|
|
|
|
|
|
|
src = bch2_trans_get_iter(&trans, BTREE_ID_EXTENTS,
|
|
|
|
POS_MIN, BTREE_ITER_SLOTS);
|
|
|
|
BUG_ON(IS_ERR_OR_NULL(src));
|
2017-03-17 06:18:50 +00:00
|
|
|
|
2018-07-12 23:19:41 +00:00
|
|
|
while (bkey_cmp(dst->pos,
|
2017-03-17 06:18:50 +00:00
|
|
|
POS(inode->v.i_ino,
|
|
|
|
round_up(new_size, PAGE_SIZE) >> 9)) < 0) {
|
|
|
|
struct disk_reservation disk_res;
|
|
|
|
|
2018-08-11 21:26:11 +00:00
|
|
|
ret = bch2_btree_iter_traverse(dst);
|
|
|
|
if (ret)
|
|
|
|
goto btree_iter_err;
|
|
|
|
|
2018-07-12 23:19:41 +00:00
|
|
|
bch2_btree_iter_set_pos(src,
|
|
|
|
POS(dst->pos.inode, dst->pos.offset + (len >> 9)));
|
2017-03-17 06:18:50 +00:00
|
|
|
|
2018-07-12 23:19:41 +00:00
|
|
|
k = bch2_btree_iter_peek_slot(src);
|
2017-03-17 06:18:50 +00:00
|
|
|
if ((ret = btree_iter_err(k)))
|
|
|
|
goto btree_iter_err;
|
|
|
|
|
|
|
|
bkey_reassemble(©.k, k);
|
|
|
|
|
2018-07-12 23:19:41 +00:00
|
|
|
bch2_cut_front(src->pos, ©.k);
|
2017-03-17 06:18:50 +00:00
|
|
|
copy.k.k.p.offset -= len >> 9;
|
|
|
|
|
2018-08-05 21:46:41 +00:00
|
|
|
bch2_extent_trim_atomic(©.k, dst);
|
|
|
|
|
2018-07-12 23:19:41 +00:00
|
|
|
BUG_ON(bkey_cmp(dst->pos, bkey_start_pos(©.k.k)));
|
2017-03-17 06:18:50 +00:00
|
|
|
|
|
|
|
ret = bch2_disk_reservation_get(c, &disk_res, copy.k.k.size,
|
|
|
|
bch2_extent_nr_dirty_ptrs(bkey_i_to_s_c(©.k)),
|
|
|
|
BCH_DISK_RESERVATION_NOFAIL);
|
|
|
|
BUG_ON(ret);
|
|
|
|
|
2018-08-11 21:26:11 +00:00
|
|
|
ret = bch2_extent_update(&trans, inode,
|
|
|
|
&disk_res, NULL,
|
|
|
|
dst, ©.k,
|
|
|
|
0, true, true, NULL);
|
2017-03-17 06:18:50 +00:00
|
|
|
bch2_disk_reservation_put(c, &disk_res);
|
|
|
|
btree_iter_err:
|
|
|
|
if (ret == -EINTR)
|
|
|
|
ret = 0;
|
2018-08-11 21:26:11 +00:00
|
|
|
if (ret)
|
|
|
|
goto err;
|
2017-03-17 06:18:50 +00:00
|
|
|
/*
|
|
|
|
* XXX: if we error here we've left data with multiple
|
|
|
|
* pointers... which isn't a _super_ serious problem...
|
|
|
|
*/
|
|
|
|
|
2018-07-12 23:19:41 +00:00
|
|
|
bch2_btree_iter_cond_resched(src);
|
2017-03-17 06:18:50 +00:00
|
|
|
}
|
2018-08-11 21:26:11 +00:00
|
|
|
bch2_trans_unlock(&trans);
|
2017-03-17 06:18:50 +00:00
|
|
|
|
2018-08-11 21:26:11 +00:00
|
|
|
ret = __bch2_fpunch(c, inode,
|
|
|
|
round_up(new_size, block_bytes(c)) >> 9,
|
|
|
|
U64_MAX, &inode->ei_journal_seq);
|
2017-03-17 06:18:50 +00:00
|
|
|
if (ret)
|
2018-08-11 21:26:11 +00:00
|
|
|
goto err;
|
2017-03-17 06:18:50 +00:00
|
|
|
|
2018-08-11 21:26:11 +00:00
|
|
|
i_size_write(&inode->v, new_size);
|
|
|
|
mutex_lock(&inode->ei_update_lock);
|
|
|
|
ret = bch2_write_inode_size(c, inode, new_size,
|
|
|
|
ATTR_MTIME|ATTR_CTIME);
|
|
|
|
mutex_unlock(&inode->ei_update_lock);
|
2017-03-17 06:18:50 +00:00
|
|
|
err:
|
2018-08-11 21:26:11 +00:00
|
|
|
bch2_trans_exit(&trans);
|
2017-03-17 06:18:50 +00:00
|
|
|
bch2_pagecache_block_put(&inode->ei_pagecache_lock);
|
|
|
|
inode_unlock(&inode->v);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static long bch2_fallocate(struct bch_inode_info *inode, int mode,
|
|
|
|
loff_t offset, loff_t len)
|
|
|
|
{
|
|
|
|
struct address_space *mapping = inode->v.i_mapping;
|
|
|
|
struct bch_fs *c = inode->v.i_sb->s_fs_info;
|
2018-08-05 21:48:00 +00:00
|
|
|
struct btree_trans trans;
|
|
|
|
struct btree_iter *iter;
|
2017-03-17 06:18:50 +00:00
|
|
|
struct bpos end_pos;
|
|
|
|
loff_t block_start, block_end;
|
|
|
|
loff_t end = offset + len;
|
|
|
|
unsigned sectors;
|
|
|
|
unsigned replicas = io_opts(c, inode).data_replicas;
|
|
|
|
int ret;
|
|
|
|
|
2018-08-05 21:48:00 +00:00
|
|
|
bch2_trans_init(&trans, c);
|
|
|
|
bch2_trans_preload_iters(&trans);
|
2017-03-17 06:18:50 +00:00
|
|
|
|
|
|
|
inode_lock(&inode->v);
|
|
|
|
inode_dio_wait(&inode->v);
|
|
|
|
bch2_pagecache_block_get(&inode->ei_pagecache_lock);
|
|
|
|
|
|
|
|
if (!(mode & FALLOC_FL_KEEP_SIZE) && end > inode->v.i_size) {
|
|
|
|
ret = inode_newsize_ok(&inode->v, end);
|
|
|
|
if (ret)
|
|
|
|
goto err;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (mode & FALLOC_FL_ZERO_RANGE) {
|
|
|
|
ret = __bch2_truncate_page(inode,
|
|
|
|
offset >> PAGE_SHIFT,
|
|
|
|
offset, end);
|
|
|
|
|
|
|
|
if (!ret &&
|
|
|
|
offset >> PAGE_SHIFT != end >> PAGE_SHIFT)
|
|
|
|
ret = __bch2_truncate_page(inode,
|
|
|
|
end >> PAGE_SHIFT,
|
|
|
|
offset, end);
|
|
|
|
|
|
|
|
if (unlikely(ret))
|
|
|
|
goto err;
|
|
|
|
|
|
|
|
truncate_pagecache_range(&inode->v, offset, end - 1);
|
|
|
|
|
|
|
|
block_start = round_up(offset, PAGE_SIZE);
|
|
|
|
block_end = round_down(end, PAGE_SIZE);
|
|
|
|
} else {
|
|
|
|
block_start = round_down(offset, PAGE_SIZE);
|
|
|
|
block_end = round_up(end, PAGE_SIZE);
|
|
|
|
}
|
|
|
|
|
2018-08-05 21:48:00 +00:00
|
|
|
iter = bch2_trans_get_iter(&trans, BTREE_ID_EXTENTS,
|
|
|
|
POS(inode->v.i_ino, block_start >> 9),
|
|
|
|
BTREE_ITER_SLOTS|BTREE_ITER_INTENT);
|
2017-03-17 06:18:50 +00:00
|
|
|
end_pos = POS(inode->v.i_ino, block_end >> 9);
|
|
|
|
|
2018-08-05 21:48:00 +00:00
|
|
|
while (bkey_cmp(iter->pos, end_pos) < 0) {
|
2017-03-17 06:18:50 +00:00
|
|
|
struct disk_reservation disk_res = { 0 };
|
2018-08-05 21:48:00 +00:00
|
|
|
struct quota_res quota_res = { 0 };
|
2017-03-17 06:18:50 +00:00
|
|
|
struct bkey_i_reservation reservation;
|
|
|
|
struct bkey_s_c k;
|
|
|
|
|
2018-08-05 21:48:00 +00:00
|
|
|
k = bch2_btree_iter_peek_slot(iter);
|
2017-03-17 06:18:50 +00:00
|
|
|
if ((ret = btree_iter_err(k)))
|
|
|
|
goto btree_iter_err;
|
|
|
|
|
|
|
|
/* already reserved */
|
|
|
|
if (k.k->type == BCH_RESERVATION &&
|
|
|
|
bkey_s_c_to_reservation(k).v->nr_replicas >= replicas) {
|
2018-08-05 21:48:00 +00:00
|
|
|
bch2_btree_iter_next_slot(iter);
|
2017-03-17 06:18:50 +00:00
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
2018-08-05 21:48:00 +00:00
|
|
|
if (bkey_extent_is_data(k.k) &&
|
|
|
|
!(mode & FALLOC_FL_ZERO_RANGE)) {
|
|
|
|
bch2_btree_iter_next_slot(iter);
|
|
|
|
continue;
|
2017-03-17 06:18:50 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
bkey_reservation_init(&reservation.k_i);
|
|
|
|
reservation.k.type = BCH_RESERVATION;
|
|
|
|
reservation.k.p = k.k->p;
|
|
|
|
reservation.k.size = k.k->size;
|
|
|
|
|
2018-08-05 21:48:00 +00:00
|
|
|
bch2_cut_front(iter->pos, &reservation.k_i);
|
2017-03-17 06:18:50 +00:00
|
|
|
bch2_cut_back(end_pos, &reservation.k);
|
|
|
|
|
|
|
|
sectors = reservation.k.size;
|
|
|
|
reservation.v.nr_replicas = bch2_extent_nr_dirty_ptrs(k);
|
|
|
|
|
|
|
|
if (!bkey_extent_is_allocation(k.k)) {
|
|
|
|
ret = bch2_quota_reservation_add(c, inode,
|
2018-08-05 21:48:00 +00:00
|
|
|
"a_res,
|
2017-03-17 06:18:50 +00:00
|
|
|
sectors, true);
|
|
|
|
if (unlikely(ret))
|
|
|
|
goto btree_iter_err;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (reservation.v.nr_replicas < replicas ||
|
|
|
|
bch2_extent_is_compressed(k)) {
|
|
|
|
ret = bch2_disk_reservation_get(c, &disk_res, sectors,
|
|
|
|
replicas, 0);
|
|
|
|
if (unlikely(ret))
|
|
|
|
goto btree_iter_err;
|
|
|
|
|
|
|
|
reservation.v.nr_replicas = disk_res.nr_replicas;
|
|
|
|
}
|
|
|
|
|
2018-08-05 21:48:00 +00:00
|
|
|
ret = bch2_extent_update(&trans, inode,
|
|
|
|
&disk_res, "a_res,
|
|
|
|
iter, &reservation.k_i,
|
|
|
|
0, true, true, NULL);
|
|
|
|
|
|
|
|
bch2_quota_reservation_put(c, inode, "a_res);
|
2017-03-17 06:18:50 +00:00
|
|
|
bch2_disk_reservation_put(c, &disk_res);
|
|
|
|
btree_iter_err:
|
|
|
|
if (ret == -EINTR)
|
|
|
|
ret = 0;
|
2018-08-05 21:48:00 +00:00
|
|
|
if (ret)
|
|
|
|
goto err;
|
2017-03-17 06:18:50 +00:00
|
|
|
}
|
2018-08-05 21:48:00 +00:00
|
|
|
bch2_trans_unlock(&trans);
|
2017-03-17 06:18:50 +00:00
|
|
|
|
|
|
|
if (!(mode & FALLOC_FL_KEEP_SIZE) &&
|
|
|
|
end > inode->v.i_size) {
|
|
|
|
i_size_write(&inode->v, end);
|
|
|
|
|
|
|
|
mutex_lock(&inode->ei_update_lock);
|
2018-07-17 18:12:42 +00:00
|
|
|
ret = bch2_write_inode_size(c, inode, inode->v.i_size, 0);
|
2017-03-17 06:18:50 +00:00
|
|
|
mutex_unlock(&inode->ei_update_lock);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* blech */
|
|
|
|
if ((mode & FALLOC_FL_KEEP_SIZE) &&
|
|
|
|
(mode & FALLOC_FL_ZERO_RANGE) &&
|
|
|
|
inode->ei_inode.bi_size != inode->v.i_size) {
|
|
|
|
/* sync appends.. */
|
|
|
|
ret = filemap_write_and_wait_range(mapping,
|
|
|
|
inode->ei_inode.bi_size, S64_MAX);
|
|
|
|
if (ret)
|
|
|
|
goto err;
|
|
|
|
|
|
|
|
if (inode->ei_inode.bi_size != inode->v.i_size) {
|
|
|
|
mutex_lock(&inode->ei_update_lock);
|
2018-07-17 18:12:42 +00:00
|
|
|
ret = bch2_write_inode_size(c, inode,
|
|
|
|
inode->v.i_size, 0);
|
2017-03-17 06:18:50 +00:00
|
|
|
mutex_unlock(&inode->ei_update_lock);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
err:
|
2018-08-05 21:48:00 +00:00
|
|
|
bch2_trans_exit(&trans);
|
2017-03-17 06:18:50 +00:00
|
|
|
bch2_pagecache_block_put(&inode->ei_pagecache_lock);
|
|
|
|
inode_unlock(&inode->v);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
long bch2_fallocate_dispatch(struct file *file, int mode,
|
|
|
|
loff_t offset, loff_t len)
|
|
|
|
{
|
|
|
|
struct bch_inode_info *inode = file_bch_inode(file);
|
|
|
|
|
|
|
|
if (!(mode & ~(FALLOC_FL_KEEP_SIZE|FALLOC_FL_ZERO_RANGE)))
|
|
|
|
return bch2_fallocate(inode, mode, offset, len);
|
|
|
|
|
|
|
|
if (mode == (FALLOC_FL_PUNCH_HOLE|FALLOC_FL_KEEP_SIZE))
|
|
|
|
return bch2_fpunch(inode, offset, len);
|
|
|
|
|
|
|
|
if (mode == FALLOC_FL_COLLAPSE_RANGE)
|
|
|
|
return bch2_fcollapse(inode, offset, len);
|
|
|
|
|
|
|
|
return -EOPNOTSUPP;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* fseek: */
|
|
|
|
|
|
|
|
static bool folio_is_data(struct folio *folio)
|
|
|
|
{
|
|
|
|
/* XXX: should only have to check PageDirty */
|
|
|
|
return folio_test_private(folio) &&
|
|
|
|
(page_state(&folio->page)->sectors ||
|
|
|
|
page_state(&folio->page)->dirty_sectors);
|
|
|
|
}
|
|
|
|
|
|
|
|
static loff_t bch2_next_pagecache_data(struct inode *vinode,
|
|
|
|
loff_t start_offset,
|
|
|
|
loff_t end_offset)
|
|
|
|
{
|
|
|
|
struct folio_batch fbatch;
|
|
|
|
pgoff_t start_index = start_offset >> PAGE_SHIFT;
|
|
|
|
pgoff_t end_index = end_offset >> PAGE_SHIFT;
|
|
|
|
pgoff_t index = start_index;
|
|
|
|
unsigned i;
|
|
|
|
|
|
|
|
folio_batch_init(&fbatch);
|
|
|
|
|
|
|
|
while (filemap_get_folios(vinode->i_mapping,
|
|
|
|
&index, end_index, &fbatch)) {
|
|
|
|
for (i = 0; i < folio_batch_count(&fbatch); i++) {
|
|
|
|
struct folio *folio = fbatch.folios[i];
|
|
|
|
|
|
|
|
folio_lock(folio);
|
|
|
|
if (folio_is_data(folio)) {
|
|
|
|
end_offset =
|
|
|
|
min(end_offset,
|
|
|
|
max(start_offset,
|
|
|
|
((loff_t) index) << PAGE_SHIFT));
|
|
|
|
folio_unlock(folio);
|
|
|
|
folio_batch_release(&fbatch);
|
|
|
|
return end_offset;
|
|
|
|
}
|
|
|
|
folio_unlock(folio);
|
|
|
|
}
|
|
|
|
folio_batch_release(&fbatch);
|
|
|
|
cond_resched();
|
|
|
|
}
|
|
|
|
|
|
|
|
return end_offset;
|
|
|
|
}
|
|
|
|
|
|
|
|
static loff_t bch2_seek_data(struct file *file, u64 offset)
|
|
|
|
{
|
|
|
|
struct bch_inode_info *inode = file_bch_inode(file);
|
|
|
|
struct bch_fs *c = inode->v.i_sb->s_fs_info;
|
|
|
|
struct btree_iter iter;
|
|
|
|
struct bkey_s_c k;
|
|
|
|
u64 isize, next_data = MAX_LFS_FILESIZE;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
isize = i_size_read(&inode->v);
|
|
|
|
if (offset >= isize)
|
|
|
|
return -ENXIO;
|
|
|
|
|
|
|
|
for_each_btree_key(&iter, c, BTREE_ID_EXTENTS,
|
|
|
|
POS(inode->v.i_ino, offset >> 9), 0, k) {
|
|
|
|
if (k.k->p.inode != inode->v.i_ino) {
|
|
|
|
break;
|
|
|
|
} else if (bkey_extent_is_data(k.k)) {
|
|
|
|
next_data = max(offset, bkey_start_offset(k.k) << 9);
|
|
|
|
break;
|
|
|
|
} else if (k.k->p.offset >> 9 > isize)
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
ret = bch2_btree_iter_unlock(&iter);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
if (next_data > offset)
|
|
|
|
next_data = bch2_next_pagecache_data(&inode->v,
|
|
|
|
offset, next_data);
|
|
|
|
|
|
|
|
if (next_data > isize)
|
|
|
|
return -ENXIO;
|
|
|
|
|
|
|
|
return vfs_setpos(file, next_data, MAX_LFS_FILESIZE);
|
|
|
|
}
|
|
|
|
|
|
|
|
static bool page_slot_is_data(struct address_space *mapping, pgoff_t index)
|
|
|
|
{
|
|
|
|
struct page *page;
|
|
|
|
bool ret;
|
|
|
|
|
|
|
|
page = find_lock_page(mapping, index);
|
|
|
|
if (!page)
|
|
|
|
return false;
|
|
|
|
|
|
|
|
ret = folio_is_data(page_folio(page));
|
|
|
|
unlock_page(page);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static loff_t bch2_next_pagecache_hole(struct inode *vinode,
|
|
|
|
loff_t start_offset,
|
|
|
|
loff_t end_offset)
|
|
|
|
{
|
|
|
|
struct address_space *mapping = vinode->i_mapping;
|
|
|
|
pgoff_t index;
|
|
|
|
|
|
|
|
for (index = start_offset >> PAGE_SHIFT;
|
|
|
|
index < end_offset >> PAGE_SHIFT;
|
|
|
|
index++)
|
|
|
|
if (!page_slot_is_data(mapping, index))
|
|
|
|
end_offset = max(start_offset,
|
|
|
|
((loff_t) index) << PAGE_SHIFT);
|
|
|
|
|
|
|
|
return end_offset;
|
|
|
|
}
|
|
|
|
|
|
|
|
static loff_t bch2_seek_hole(struct file *file, u64 offset)
|
|
|
|
{
|
|
|
|
struct bch_inode_info *inode = file_bch_inode(file);
|
|
|
|
struct bch_fs *c = inode->v.i_sb->s_fs_info;
|
|
|
|
struct btree_iter iter;
|
|
|
|
struct bkey_s_c k;
|
|
|
|
u64 isize, next_hole = MAX_LFS_FILESIZE;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
isize = i_size_read(&inode->v);
|
|
|
|
if (offset >= isize)
|
|
|
|
return -ENXIO;
|
|
|
|
|
|
|
|
for_each_btree_key(&iter, c, BTREE_ID_EXTENTS,
|
|
|
|
POS(inode->v.i_ino, offset >> 9),
|
|
|
|
BTREE_ITER_SLOTS, k) {
|
|
|
|
if (k.k->p.inode != inode->v.i_ino) {
|
|
|
|
next_hole = bch2_next_pagecache_hole(&inode->v,
|
|
|
|
offset, MAX_LFS_FILESIZE);
|
|
|
|
break;
|
|
|
|
} else if (!bkey_extent_is_data(k.k)) {
|
|
|
|
next_hole = bch2_next_pagecache_hole(&inode->v,
|
|
|
|
max(offset, bkey_start_offset(k.k) << 9),
|
|
|
|
k.k->p.offset << 9);
|
|
|
|
|
|
|
|
if (next_hole < k.k->p.offset << 9)
|
|
|
|
break;
|
|
|
|
} else {
|
|
|
|
offset = max(offset, bkey_start_offset(k.k) << 9);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
ret = bch2_btree_iter_unlock(&iter);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
if (next_hole > isize)
|
|
|
|
next_hole = isize;
|
|
|
|
|
|
|
|
return vfs_setpos(file, next_hole, MAX_LFS_FILESIZE);
|
|
|
|
}
|
|
|
|
|
|
|
|
loff_t bch2_llseek(struct file *file, loff_t offset, int whence)
|
|
|
|
{
|
|
|
|
switch (whence) {
|
|
|
|
case SEEK_SET:
|
|
|
|
case SEEK_CUR:
|
|
|
|
case SEEK_END:
|
|
|
|
return generic_file_llseek(file, offset, whence);
|
|
|
|
case SEEK_DATA:
|
|
|
|
return bch2_seek_data(file, offset);
|
|
|
|
case SEEK_HOLE:
|
|
|
|
return bch2_seek_hole(file, offset);
|
|
|
|
}
|
|
|
|
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
void bch2_fs_fsio_exit(struct bch_fs *c)
|
|
|
|
{
|
|
|
|
bioset_exit(&c->dio_write_bioset);
|
|
|
|
bioset_exit(&c->dio_read_bioset);
|
|
|
|
bioset_exit(&c->writepage_bioset);
|
|
|
|
}
|
|
|
|
|
|
|
|
int bch2_fs_fsio_init(struct bch_fs *c)
|
|
|
|
{
|
|
|
|
int ret = 0;
|
|
|
|
|
|
|
|
pr_verbose_init(c->opts, "");
|
|
|
|
|
|
|
|
if (bioset_init(&c->writepage_bioset,
|
|
|
|
4, offsetof(struct bch_writepage_io, op.op.wbio.bio),
|
|
|
|
BIOSET_NEED_BVECS) ||
|
|
|
|
bioset_init(&c->dio_read_bioset,
|
|
|
|
4, offsetof(struct dio_read, rbio.bio),
|
|
|
|
BIOSET_NEED_BVECS) ||
|
|
|
|
bioset_init(&c->dio_write_bioset,
|
|
|
|
4, offsetof(struct dio_write, iop.op.wbio.bio),
|
|
|
|
BIOSET_NEED_BVECS))
|
|
|
|
ret = -ENOMEM;
|
|
|
|
|
|
|
|
pr_verbose_init(c->opts, "ret %i", ret);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
#endif /* NO_BCACHEFS_FS */
|