#include "bcachefs.h"
#include "alloc_foreground.h"
-#include "bkey_on_stack.h"
+#include "bkey_buf.h"
#include "btree_update.h"
#include "buckets.h"
#include "clock.h"
#include <trace/events/bcachefs.h>
#include <trace/events/writeback.h>
+static inline bool bio_full(struct bio *bio, unsigned len)
+{
+ if (bio->bi_vcnt >= bio->bi_max_vecs)
+ return true;
+ if (bio->bi_iter.bi_size > UINT_MAX - len)
+ return true;
+ return false;
+}
+
static inline struct address_space *faults_disabled_mapping(void)
{
return (void *) (((unsigned long) current->faults_disabled_mapping) & ~1UL);
struct closure cl;
struct kiocb *req;
long ret;
+ bool should_dirty;
struct bch_read_bio rbio;
};
* is continually redirtying a specific page
*/
do {
- if (!mapping->nrpages &&
- !mapping->nrexceptional)
+ if (!mapping->nrpages)
return 0;
ret = filemap_write_and_wait_range(mapping, start, end);
static int bch2_quota_reservation_add(struct bch_fs *c,
struct bch_inode_info *inode,
struct quota_res *res,
- unsigned sectors,
+ u64 sectors,
bool check_enospc)
{
int ret;
return;
mutex_lock(&inode->ei_quota_lock);
+ bch2_fs_inconsistent_on((s64) inode->v.i_blocks + sectors < 0, c,
+ "inode %lu i_blocks underflow: %llu + %lli < 0 (ondisk %lli)",
+ inode->v.i_ino, (u64) inode->v.i_blocks, sectors,
+ inode->ei_inode.bi_sectors);
+ inode->v.i_blocks += sectors;
+
#ifdef CONFIG_BCACHEFS_QUOTA
if (quota_res && sectors > 0) {
BUG_ON(sectors > quota_res->sectors);
bch2_quota_acct(c, inode->ei_qid, Q_SPC, sectors, KEY_TYPE_QUOTA_WARN);
}
#endif
- inode->v.i_blocks += sectors;
mutex_unlock(&inode->ei_quota_lock);
}
/* stored in page->private: */
struct bch_page_sector {
- /* Uncompressed, fully allocated replicas: */
- unsigned nr_replicas:3;
+ /* Uncompressed, fully allocated replicas (or on disk reservation): */
+ unsigned nr_replicas:4;
- /* Owns PAGE_SECTORS * replicas_reserved sized reservation: */
- unsigned replicas_reserved:3;
+ /* Owns PAGE_SECTORS * replicas_reserved sized in memory reservation: */
+ unsigned replicas_reserved:4;
/* i_sectors: */
enum {
SECTOR_UNALLOCATED,
SECTOR_RESERVED,
SECTOR_DIRTY,
+ SECTOR_DIRTY_RESERVED,
SECTOR_ALLOCATED,
- } state:2;
+ } state:8;
};
struct bch_page_state {
spinlock_t lock;
atomic_t write_count;
+ bool uptodate;
struct bch_page_sector s[PAGE_SECTORS];
};
return bch2_page_state(page) ?: __bch2_page_state_create(page, gfp);
}
+static unsigned bkey_to_sector_state(const struct bkey *k)
+{
+ if (k->type == KEY_TYPE_reservation)
+ return SECTOR_RESERVED;
+ if (bkey_extent_is_allocation(k))
+ return SECTOR_ALLOCATED;
+ return SECTOR_UNALLOCATED;
+}
+
+static void __bch2_page_state_set(struct page *page,
+ unsigned pg_offset, unsigned pg_len,
+ unsigned nr_ptrs, unsigned state)
+{
+ struct bch_page_state *s = bch2_page_state_create(page, __GFP_NOFAIL);
+ unsigned i;
+
+ BUG_ON(pg_offset >= PAGE_SECTORS);
+ BUG_ON(pg_offset + pg_len > PAGE_SECTORS);
+
+ spin_lock(&s->lock);
+
+ for (i = pg_offset; i < pg_offset + pg_len; i++) {
+ s->s[i].nr_replicas = nr_ptrs;
+ s->s[i].state = state;
+ }
+
+ if (i == PAGE_SECTORS)
+ s->uptodate = true;
+
+ spin_unlock(&s->lock);
+}
+
+static int bch2_page_state_set(struct bch_fs *c, subvol_inum inum,
+ struct page **pages, unsigned nr_pages)
+{
+ struct btree_trans trans;
+ struct btree_iter iter;
+ struct bkey_s_c k;
+ u64 offset = pages[0]->index << PAGE_SECTORS_SHIFT;
+ unsigned pg_idx = 0;
+ u32 snapshot;
+ int ret;
+
+ bch2_trans_init(&trans, c, 0, 0);
+retry:
+ bch2_trans_begin(&trans);
+
+ ret = bch2_subvolume_get_snapshot(&trans, inum.subvol, &snapshot);
+ if (ret)
+ goto err;
+
+ for_each_btree_key_norestart(&trans, iter, BTREE_ID_extents,
+ SPOS(inum.inum, offset, snapshot),
+ BTREE_ITER_SLOTS, k, ret) {
+ unsigned nr_ptrs = bch2_bkey_nr_ptrs_fully_allocated(k);
+ unsigned state = bkey_to_sector_state(k.k);
+
+ while (pg_idx < nr_pages) {
+ struct page *page = pages[pg_idx];
+ u64 pg_start = page->index << PAGE_SECTORS_SHIFT;
+ u64 pg_end = (page->index + 1) << PAGE_SECTORS_SHIFT;
+ unsigned pg_offset = max(bkey_start_offset(k.k), pg_start) - pg_start;
+ unsigned pg_len = min(k.k->p.offset, pg_end) - pg_offset - pg_start;
+
+ BUG_ON(k.k->p.offset < pg_start);
+ BUG_ON(bkey_start_offset(k.k) > pg_end);
+
+ if (!bch2_page_state_create(page, __GFP_NOFAIL)->uptodate)
+ __bch2_page_state_set(page, pg_offset, pg_len, nr_ptrs, state);
+
+ if (k.k->p.offset < pg_end)
+ break;
+ pg_idx++;
+ }
+
+ if (pg_idx == nr_pages)
+ break;
+ }
+
+ offset = iter.pos.offset;
+ bch2_trans_iter_exit(&trans, &iter);
+err:
+ if (bch2_err_matches(ret, BCH_ERR_transaction_restart))
+ goto retry;
+ bch2_trans_exit(&trans);
+
+ return ret;
+}
+
+static void bch2_bio_page_state_set(struct bio *bio, struct bkey_s_c k)
+{
+ struct bvec_iter iter;
+ struct bio_vec bv;
+ unsigned nr_ptrs = k.k->type == KEY_TYPE_reflink_v
+ ? 0 : bch2_bkey_nr_ptrs_fully_allocated(k);
+ unsigned state = bkey_to_sector_state(k.k);
+
+ bio_for_each_segment(bv, bio, iter)
+ __bch2_page_state_set(bv.bv_page, bv.bv_offset >> 9,
+ bv.bv_len >> 9, nr_ptrs, state);
+}
+
+static void mark_pagecache_unallocated(struct bch_inode_info *inode,
+ u64 start, u64 end)
+{
+ pgoff_t index = start >> PAGE_SECTORS_SHIFT;
+ pgoff_t end_index = (end - 1) >> PAGE_SECTORS_SHIFT;
+ struct folio_batch fbatch;
+ unsigned i, j;
+
+ if (end <= start)
+ return;
+
+ folio_batch_init(&fbatch);
+
+ while (filemap_get_folios(inode->v.i_mapping,
+ &index, end_index, &fbatch)) {
+ for (i = 0; i < folio_batch_count(&fbatch); i++) {
+ struct folio *folio = fbatch.folios[i];
+ u64 pg_start = folio->index << PAGE_SECTORS_SHIFT;
+ u64 pg_end = (folio->index + 1) << PAGE_SECTORS_SHIFT;
+ unsigned pg_offset = max(start, pg_start) - pg_start;
+ unsigned pg_len = min(end, pg_end) - pg_offset - pg_start;
+ struct bch_page_state *s;
+
+ BUG_ON(end <= pg_start);
+ BUG_ON(pg_offset >= PAGE_SECTORS);
+ BUG_ON(pg_offset + pg_len > PAGE_SECTORS);
+
+ folio_lock(folio);
+ s = bch2_page_state(&folio->page);
+
+ if (s) {
+ spin_lock(&s->lock);
+ for (j = pg_offset; j < pg_offset + pg_len; j++)
+ s->s[j].nr_replicas = 0;
+ spin_unlock(&s->lock);
+ }
+
+ folio_unlock(folio);
+ }
+ folio_batch_release(&fbatch);
+ cond_resched();
+ }
+}
+
+static void mark_pagecache_reserved(struct bch_inode_info *inode,
+ u64 start, u64 end)
+{
+ struct bch_fs *c = inode->v.i_sb->s_fs_info;
+ pgoff_t index = start >> PAGE_SECTORS_SHIFT;
+ pgoff_t end_index = (end - 1) >> PAGE_SECTORS_SHIFT;
+ struct folio_batch fbatch;
+ s64 i_sectors_delta = 0;
+ unsigned i, j;
+
+ if (end <= start)
+ return;
+
+ folio_batch_init(&fbatch);
+
+ while (filemap_get_folios(inode->v.i_mapping,
+ &index, end_index, &fbatch)) {
+ for (i = 0; i < folio_batch_count(&fbatch); i++) {
+ struct folio *folio = fbatch.folios[i];
+ u64 pg_start = folio->index << PAGE_SECTORS_SHIFT;
+ u64 pg_end = (folio->index + 1) << PAGE_SECTORS_SHIFT;
+ unsigned pg_offset = max(start, pg_start) - pg_start;
+ unsigned pg_len = min(end, pg_end) - pg_offset - pg_start;
+ struct bch_page_state *s;
+
+ BUG_ON(end <= pg_start);
+ BUG_ON(pg_offset >= PAGE_SECTORS);
+ BUG_ON(pg_offset + pg_len > PAGE_SECTORS);
+
+ folio_lock(folio);
+ s = bch2_page_state(&folio->page);
+
+ if (s) {
+ spin_lock(&s->lock);
+ for (j = pg_offset; j < pg_offset + pg_len; j++)
+ switch (s->s[j].state) {
+ case SECTOR_UNALLOCATED:
+ s->s[j].state = SECTOR_RESERVED;
+ break;
+ case SECTOR_DIRTY:
+ s->s[j].state = SECTOR_DIRTY_RESERVED;
+ i_sectors_delta--;
+ break;
+ default:
+ break;
+ }
+ spin_unlock(&s->lock);
+ }
+
+ folio_unlock(folio);
+ }
+ folio_batch_release(&fbatch);
+ cond_resched();
+ }
+
+ i_sectors_acct(c, inode, NULL, i_sectors_delta);
+}
+
static inline unsigned inode_nr_replicas(struct bch_fs *c, struct bch_inode_info *inode)
{
/* XXX: this should not be open coded */
if (!s)
return -ENOMEM;
+ BUG_ON(!s->uptodate);
+
for (i = round_down(offset, block_bytes(c)) >> 9;
i < round_up(offset + len, block_bytes(c)) >> 9;
i++) {
disk_res.sectors += s->s[i].replicas_reserved;
s->s[i].replicas_reserved = 0;
- if (s->s[i].state == SECTOR_DIRTY) {
- dirty_sectors++;
+ switch (s->s[i].state) {
+ case SECTOR_DIRTY:
s->s[i].state = SECTOR_UNALLOCATED;
+ --dirty_sectors;
+ break;
+ case SECTOR_DIRTY_RESERVED:
+ s->s[i].state = SECTOR_RESERVED;
+ break;
+ default:
+ break;
}
}
bch2_disk_reservation_put(c, &disk_res);
- if (dirty_sectors)
- i_sectors_acct(c, inode, NULL, -dirty_sectors);
+ i_sectors_acct(c, inode, NULL, dirty_sectors);
bch2_page_state_release(page);
}
s->s[i].replicas_reserved += sectors;
res->disk.sectors -= sectors;
- if (s->s[i].state == SECTOR_UNALLOCATED)
+ switch (s->s[i].state) {
+ case SECTOR_UNALLOCATED:
+ s->s[i].state = SECTOR_DIRTY;
dirty_sectors++;
-
- s->s[i].state = max_t(unsigned, s->s[i].state, SECTOR_DIRTY);
+ break;
+ case SECTOR_RESERVED:
+ s->s[i].state = SECTOR_DIRTY_RESERVED;
+ break;
+ default:
+ break;
+ }
}
spin_unlock(&s->lock);
- if (dirty_sectors)
- i_sectors_acct(c, inode, &res->quota, dirty_sectors);
+ i_sectors_acct(c, inode, &res->quota, dirty_sectors);
if (!PageDirty(page))
__set_page_dirty_nobuffers(page);
struct bch2_page_reservation res;
unsigned len;
loff_t isize;
- int ret = VM_FAULT_LOCKED;
+ int ret;
bch2_page_reservation_init(c, inode, &res);
len = min_t(loff_t, PAGE_SIZE, isize - page_offset(page));
+ if (!bch2_page_state_create(page, __GFP_NOFAIL)->uptodate) {
+ if (bch2_page_state_set(c, inode_inum(inode), &page, 1)) {
+ unlock_page(page);
+ ret = VM_FAULT_SIGBUS;
+ goto out;
+ }
+ }
+
if (bch2_page_reservation_get(c, inode, page, &res, 0, len, true)) {
unlock_page(page);
ret = VM_FAULT_SIGBUS;
bch2_page_reservation_put(c, inode, &res);
wait_for_stable_page(page);
+ ret = VM_FAULT_LOCKED;
out:
bch2_pagecache_add_put(&inode->ei_pagecache_lock);
sb_end_pagefault(inode->v.i_sb);
return ret;
}
-void bch2_invalidatepage(struct page *page, unsigned int offset,
- unsigned int length)
+void bch2_invalidate_folio(struct folio *folio, size_t offset, size_t length)
{
- if (offset || length < PAGE_SIZE)
+ if (offset || length < folio_size(folio))
return;
- bch2_clear_page_bits(page);
+ bch2_clear_page_bits(&folio->page);
}
-int bch2_releasepage(struct page *page, gfp_t gfp_mask)
+bool bch2_release_folio(struct folio *folio, gfp_t gfp_mask)
{
- if (PageDirty(page))
- return 0;
-
- bch2_clear_page_bits(page);
- return 1;
-}
-
-#ifdef CONFIG_MIGRATION
-int bch2_migrate_page(struct address_space *mapping, struct page *newpage,
- struct page *page, enum migrate_mode mode)
-{
- int ret;
-
- EBUG_ON(!PageLocked(page));
- EBUG_ON(!PageLocked(newpage));
+ if (folio_test_dirty(folio) || folio_test_writeback(folio))
+ return false;
- ret = migrate_page_move_mapping(mapping, newpage, page, 0);
- if (ret != MIGRATEPAGE_SUCCESS)
- return ret;
-
- if (PagePrivate(page))
- attach_page_private(newpage, detach_page_private(page));
-
- if (mode != MIGRATE_SYNC_NO_COPY)
- migrate_page_copy(newpage, page);
- else
- migrate_page_states(newpage, page);
- return MIGRATEPAGE_SUCCESS;
+ bch2_clear_page_bits(&folio->page);
+ return true;
}
-#endif
/* readpage(s): */
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;
- unsigned nr_ptrs = k.k->type == KEY_TYPE_reflink_v
- ? 0 : bch2_bkey_nr_ptrs_fully_allocated(k);
- unsigned state = k.k->type == KEY_TYPE_reservation
- ? SECTOR_RESERVED
- : SECTOR_ALLOCATED;
-
- bio_for_each_segment(bv, bio, iter) {
- struct bch_page_state *s = bch2_page_state(bv.bv_page);
- unsigned i;
-
- for (i = bv.bv_offset >> 9;
- i < (bv.bv_offset + bv.bv_len) >> 9;
- i++) {
- s->s[i].nr_replicas = nr_ptrs;
- s->s[i].state = state;
- }
- }
-}
-
static bool extent_partial_reads_expensive(struct bkey_s_c k)
{
struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k);
{
while (bio_sectors(bio) < sectors_this_extent &&
bio->bi_vcnt < bio->bi_max_vecs) {
- pgoff_t page_offset = bio_end_sector(bio) >> PAGE_SECTOR_SHIFT;
+ pgoff_t page_offset = bio_end_sector(bio) >> PAGE_SECTORS_SHIFT;
struct page *page = readpage_iter_next(iter);
int ret;
}
}
-static void bchfs_read(struct btree_trans *trans, struct btree_iter *iter,
- struct bch_read_bio *rbio, u64 inum,
+static void bchfs_read(struct btree_trans *trans,
+ struct bch_read_bio *rbio,
+ subvol_inum inum,
struct readpages_iter *readpages_iter)
{
struct bch_fs *c = trans->c;
- struct bkey_on_stack sk;
+ struct btree_iter iter;
+ struct bkey_buf sk;
int flags = BCH_READ_RETRY_IF_STALE|
BCH_READ_MAY_PROMOTE;
+ u32 snapshot;
int ret = 0;
rbio->c = c;
rbio->start_time = local_clock();
+ rbio->subvol = inum.subvol;
- bkey_on_stack_init(&sk);
+ bch2_bkey_buf_init(&sk);
retry:
+ bch2_trans_begin(trans);
+ iter = (struct btree_iter) { NULL };
+
+ ret = bch2_subvolume_get_snapshot(trans, inum.subvol, &snapshot);
+ if (ret)
+ goto err;
+
+ bch2_trans_iter_init(trans, &iter, BTREE_ID_extents,
+ SPOS(inum.inum, rbio->bio.bi_iter.bi_sector, snapshot),
+ BTREE_ITER_SLOTS);
while (1) {
struct bkey_s_c k;
unsigned bytes, sectors, offset_into_extent;
+ enum btree_id data_btree = BTREE_ID_extents;
+
+ /*
+ * read_extent -> io_time_reset may cause a transaction restart
+ * without returning an error, we need to check for that here:
+ */
+ ret = bch2_trans_relock(trans);
+ if (ret)
+ break;
- bch2_btree_iter_set_pos(iter,
- POS(inum, rbio->bio.bi_iter.bi_sector));
+ bch2_btree_iter_set_pos(&iter,
+ POS(inum.inum, rbio->bio.bi_iter.bi_sector));
- k = bch2_btree_iter_peek_slot(iter);
+ k = bch2_btree_iter_peek_slot(&iter);
ret = bkey_err(k);
if (ret)
break;
- offset_into_extent = iter->pos.offset -
+ offset_into_extent = iter.pos.offset -
bkey_start_offset(k.k);
sectors = k.k->size - offset_into_extent;
- bkey_on_stack_reassemble(&sk, c, k);
+ bch2_bkey_buf_reassemble(&sk, c, k);
- ret = bch2_read_indirect_extent(trans,
+ ret = bch2_read_indirect_extent(trans, &data_btree,
&offset_into_extent, &sk);
if (ret)
break;
sectors = min(sectors, k.k->size - offset_into_extent);
- bch2_trans_unlock(trans);
-
if (readpages_iter)
readpage_bio_extend(readpages_iter, &rbio->bio, sectors,
extent_partial_reads_expensive(k));
if (rbio->bio.bi_iter.bi_size == bytes)
flags |= BCH_READ_LAST_FRAGMENT;
- if (bkey_extent_is_allocation(k.k))
- bch2_add_page_sectors(&rbio->bio, k);
+ bch2_bio_page_state_set(&rbio->bio, k);
- bch2_read_extent(trans, rbio, k, offset_into_extent, flags);
+ bch2_read_extent(trans, rbio, iter.pos,
+ data_btree, k, offset_into_extent, flags);
if (flags & BCH_READ_LAST_FRAGMENT)
break;
swap(rbio->bio.bi_iter.bi_size, bytes);
bio_advance(&rbio->bio, bytes);
+
+ ret = btree_trans_too_many_iters(trans);
+ if (ret)
+ break;
}
+err:
+ bch2_trans_iter_exit(trans, &iter);
- if (ret == -EINTR)
+ if (bch2_err_matches(ret, BCH_ERR_transaction_restart))
goto retry;
if (ret) {
- bcache_io_error(c, &rbio->bio, "btree IO error %i", ret);
+ bch_err_inum_ratelimited(c, inum.inum,
+ "read error %i from btree lookup", ret);
+ rbio->bio.bi_status = BLK_STS_IOERR;
bio_endio(&rbio->bio);
}
- bkey_on_stack_exit(&sk, c);
+ bch2_bkey_buf_exit(&sk, c);
}
void bch2_readahead(struct readahead_control *ractl)
struct bch_fs *c = inode->v.i_sb->s_fs_info;
struct bch_io_opts opts = io_opts(c, &inode->ei_inode);
struct btree_trans trans;
- struct btree_iter *iter;
struct page *page;
struct readpages_iter readpages_iter;
int ret;
bch2_trans_init(&trans, c, 0, 0);
- iter = bch2_trans_get_iter(&trans, BTREE_ID_EXTENTS, POS_MIN,
- BTREE_ITER_SLOTS);
-
bch2_pagecache_add_get(&inode->ei_pagecache_lock);
while ((page = readpage_iter_next(&readpages_iter))) {
unsigned n = min_t(unsigned,
readpages_iter.nr_pages -
readpages_iter.idx,
- BIO_MAX_PAGES);
+ BIO_MAX_VECS);
struct bch_read_bio *rbio =
- rbio_init(bio_alloc_bioset(GFP_NOFS, n, &c->bio_read),
+ rbio_init(bio_alloc_bioset(NULL, n, REQ_OP_READ,
+ GFP_NOFS, &c->bio_read),
opts);
readpages_iter.idx++;
- bio_set_op_attrs(&rbio->bio, REQ_OP_READ, 0);
- rbio->bio.bi_iter.bi_sector = (sector_t) index << PAGE_SECTOR_SHIFT;
+ rbio->bio.bi_iter.bi_sector = (sector_t) index << PAGE_SECTORS_SHIFT;
rbio->bio.bi_end_io = bch2_readpages_end_io;
BUG_ON(!bio_add_page(&rbio->bio, page, PAGE_SIZE, 0));
- bchfs_read(&trans, iter, rbio, inode->v.i_ino,
+ bchfs_read(&trans, rbio, inode_inum(inode),
&readpages_iter);
}
}
static void __bchfs_readpage(struct bch_fs *c, struct bch_read_bio *rbio,
- u64 inum, struct page *page)
+ subvol_inum inum, struct page *page)
{
struct btree_trans trans;
- struct btree_iter *iter;
bch2_page_state_create(page, __GFP_NOFAIL);
bio_set_op_attrs(&rbio->bio, REQ_OP_READ, REQ_SYNC);
rbio->bio.bi_iter.bi_sector =
- (sector_t) page->index << PAGE_SECTOR_SHIFT;
+ (sector_t) page->index << PAGE_SECTORS_SHIFT;
BUG_ON(!bio_add_page(&rbio->bio, page, PAGE_SIZE, 0));
bch2_trans_init(&trans, c, 0, 0);
- iter = bch2_trans_get_iter(&trans, BTREE_ID_EXTENTS, POS_MIN,
- BTREE_ITER_SLOTS);
-
- bchfs_read(&trans, iter, rbio, inum, NULL);
-
+ bchfs_read(&trans, rbio, inum, NULL);
bch2_trans_exit(&trans);
}
-int bch2_readpage(struct file *file, 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_io_opts opts = io_opts(c, &inode->ei_inode);
- struct bch_read_bio *rbio;
-
- rbio = rbio_init(bio_alloc_bioset(GFP_NOFS, 1, &c->bio_read), opts);
- rbio->bio.bi_end_io = bch2_readpages_end_io;
-
- __bchfs_readpage(c, rbio, inode->v.i_ino, page);
- return 0;
-}
-
static void bch2_read_single_page_end_io(struct bio *bio)
{
complete(bio->bi_private);
int ret;
DECLARE_COMPLETION_ONSTACK(done);
- rbio = rbio_init(bio_alloc_bioset(GFP_NOFS, 1, &c->bio_read),
+ rbio = rbio_init(bio_alloc_bioset(NULL, 1, REQ_OP_READ, GFP_NOFS, &c->bio_read),
io_opts(c, &inode->ei_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);
+ __bchfs_readpage(c, rbio, inode_inum(inode), page);
wait_for_completion(&done);
ret = blk_status_to_errno(rbio->bio.bi_status);
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 bch2_err_class(ret);
+}
+
/* writepages: */
struct bch_writepage_state {
unsigned i;
if (io->op.error) {
+ set_bit(EI_INODE_ERROR, &io->inode->ei_flags);
+
bio_for_each_segment_all(bvec, bio, iter) {
struct bch_page_state *s;
* 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.i_sectors_delta > 0);
+ WARN_ON_ONCE(io->op.i_sectors_delta > 0);
/*
* (error (due to going RO) halfway through a page can screw that up
{
struct bch_write_op *op;
- w->io = container_of(bio_alloc_bioset(GFP_NOFS,
- BIO_MAX_PAGES,
+ w->io = container_of(bio_alloc_bioset(NULL, BIO_MAX_VECS,
+ REQ_OP_WRITE,
+ GFP_NOFS,
&c->writepage_bioset),
struct bch_writepage_io, op.wbio.bio);
op = &w->io->op;
bch2_write_op_init(op, c, w->opts);
op->target = w->opts.foreground_target;
- op_journal_seq_set(op, &inode->ei_journal_seq);
op->nr_replicas = nr_replicas;
op->res.nr_replicas = nr_replicas;
op->write_point = writepoint_hashed(inode->ei_last_dirtied);
+ op->subvol = inode->ei_subvol;
op->pos = POS(inode->v.i_ino, sector);
op->wbio.bio.bi_iter.bi_sector = sector;
op->wbio.bio.bi_opf = wbc_to_write_flags(wbc);
do_io:
s = bch2_page_state_create(page, __GFP_NOFAIL);
- ret = bch2_get_page_disk_reservation(c, inode, page, true);
- if (ret) {
- SetPageError(page);
- mapping_set_error(page->mapping, ret);
- unlock_page(page);
- return 0;
- }
+ /*
+ * Things get really hairy with errors during writeback:
+ */
+ ret = bch2_get_page_disk_reservation(c, inode, page, false);
+ BUG_ON(ret);
/* Before unlocking the page, get copy of reservations: */
+ spin_lock(&s->lock);
orig = *s;
+ spin_unlock(&s->lock);
for (i = 0; i < PAGE_SECTORS; i++) {
if (s->s[i].state < SECTOR_DIRTY)
offset = 0;
while (1) {
- unsigned sectors = 1, dirty_sectors = 0, reserved_sectors = 0;
+ unsigned sectors = 0, dirty_sectors = 0, reserved_sectors = 0;
u64 sector;
while (offset < PAGE_SECTORS &&
if (offset == PAGE_SECTORS)
break;
- sector = ((u64) page->index << PAGE_SECTOR_SHIFT) + offset;
-
while (offset + sectors < PAGE_SECTORS &&
- orig.s[offset + sectors].state >= SECTOR_DIRTY)
+ orig.s[offset + sectors].state >= SECTOR_DIRTY) {
+ reserved_sectors += orig.s[offset + sectors].replicas_reserved;
+ dirty_sectors += orig.s[offset + sectors].state == SECTOR_DIRTY;
sectors++;
-
- for (i = offset; i < offset + sectors; i++) {
- reserved_sectors += orig.s[i].replicas_reserved;
- dirty_sectors += orig.s[i].state == SECTOR_DIRTY;
}
+ BUG_ON(!sectors);
+
+ sector = ((u64) page->index << PAGE_SECTORS_SHIFT) + offset;
if (w->io &&
(w->io->op.res.nr_replicas != nr_replicas_this_write ||
bio_full(&w->io->op.wbio.bio, PAGE_SIZE) ||
w->io->op.wbio.bio.bi_iter.bi_size + (sectors << 9) >=
- (BIO_MAX_PAGES * PAGE_SIZE) ||
+ (BIO_MAX_VECS * PAGE_SIZE) ||
bio_end_sector(&w->io->op.wbio.bio) != sector))
bch2_writepage_do_io(w);
sectors << 9, offset << 9));
/* Check for writing past i_size: */
- WARN_ON((bio_end_sector(&w->io->op.wbio.bio) << 9) >
- round_up(i_size, block_bytes(c)));
+ WARN_ON_ONCE((bio_end_sector(&w->io->op.wbio.bio) << 9) >
+ round_up(i_size, block_bytes(c)));
w->io->op.res.sectors += reserved_sectors;
w->io->op.i_sectors_delta -= dirty_sectors;
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, wbc, &w);
- if (w.io)
- bch2_writepage_do_io(&w);
-
- return ret;
+ return bch2_err_class(ret);
}
/* buffered writes: */
int bch2_write_begin(struct file *file, struct address_space *mapping,
- loff_t pos, unsigned len, unsigned flags,
+ loff_t pos, unsigned len,
struct page **pagep, void **fsdata)
{
struct bch_inode_info *inode = to_bch_ei(mapping->host);
bch2_pagecache_add_get(&inode->ei_pagecache_lock);
- page = grab_cache_page_write_begin(mapping, index, flags);
+ page = grab_cache_page_write_begin(mapping, index);
if (!page)
goto err_unlock;
if (ret)
goto err;
out:
+ if (!bch2_page_state_create(page, __GFP_NOFAIL)->uptodate) {
+ ret = bch2_page_state_set(c, inode_inum(inode), &page, 1);
+ if (ret)
+ goto err;
+ }
+
ret = bch2_page_reservation_get(c, inode, page, res,
offset, len, true);
if (ret) {
bch2_pagecache_add_put(&inode->ei_pagecache_lock);
kfree(res);
*fsdata = NULL;
- return ret;
+ return bch2_err_class(ret);
}
int bch2_write_end(struct file *file, struct address_space *mapping,
bch2_page_reservation_init(c, inode, &res);
for (i = 0; i < nr_pages; i++) {
- pages[i] = grab_cache_page_write_begin(mapping, index + i, 0);
+ pages[i] = grab_cache_page_write_begin(mapping, index + i);
if (!pages[i]) {
nr_pages = i;
if (!i) {
}
while (reserved < len) {
- struct page *page = pages[(offset + reserved) >> PAGE_SHIFT];
+ unsigned i = (offset + reserved) >> PAGE_SHIFT;
+ struct page *page = pages[i];
unsigned pg_offset = (offset + reserved) & (PAGE_SIZE - 1);
unsigned pg_len = min_t(unsigned, len - reserved,
PAGE_SIZE - pg_offset);
-retry_reservation:
- ret = bch2_page_reservation_get(c, inode, page, &res,
- pg_offset, pg_len, true);
- if (ret && !PageUptodate(page)) {
- ret = bch2_read_single_page(page, mapping);
- if (!ret)
- goto retry_reservation;
+ if (!bch2_page_state_create(page, __GFP_NOFAIL)->uptodate) {
+ ret = bch2_page_state_set(c, inode_inum(inode),
+ pages + i, nr_pages - i);
+ if (ret)
+ goto out;
}
+ ret = bch2_page_reservation_get(c, inode, page, &res,
+ pg_offset, pg_len, true);
if (ret)
goto out;
unsigned pg_offset = (offset + copied) & (PAGE_SIZE - 1);
unsigned pg_len = min_t(unsigned, len - copied,
PAGE_SIZE - pg_offset);
- unsigned pg_copied = iov_iter_copy_from_user_atomic(page,
- iter, pg_offset, pg_len);
+ unsigned pg_copied = copy_page_from_iter_atomic(page,
+ pg_offset, pg_len,iter);
if (!pg_copied)
break;
}
flush_dcache_page(page);
- iov_iter_advance(iter, pg_copied);
copied += pg_copied;
if (pg_copied != pg_len)
* to check that the address is actually valid, when atomic
* usercopies are used, below.
*/
- if (unlikely(iov_iter_fault_in_readable(iter, bytes))) {
+ if (unlikely(fault_in_iov_iter_readable(iter, bytes))) {
bytes = min_t(unsigned long, iov_iter_count(iter),
PAGE_SIZE - offset);
- if (unlikely(iov_iter_fault_in_readable(iter, bytes))) {
+ if (unlikely(fault_in_iov_iter_readable(iter, bytes))) {
ret = -EFAULT;
break;
}
/* O_DIRECT reads */
+static void bio_check_or_release(struct bio *bio, bool check_dirty)
+{
+ if (check_dirty) {
+ bio_check_pages_dirty(bio);
+ } else {
+ bio_release_pages(bio, false);
+ bio_put(bio);
+ }
+}
+
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, 0);
- bio_check_pages_dirty(&dio->rbio.bio); /* transfers ownership */
+ dio->req->ki_complete(dio->req, dio->ret);
+ bio_check_or_release(&dio->rbio.bio, dio->should_dirty);
}
static void bch2_direct_IO_read_endio(struct bio *bio)
static void bch2_direct_IO_read_split_endio(struct bio *bio)
{
+ struct dio_read *dio = bio->bi_private;
+ bool should_dirty = dio->should_dirty;
+
bch2_direct_IO_read_endio(bio);
- bio_check_pages_dirty(bio); /* transfers ownership */
+ bio_check_or_release(bio, should_dirty);
}
static int bch2_direct_IO_read(struct kiocb *req, struct iov_iter *iter)
shorten = iov_iter_count(iter) - round_up(ret, block_bytes(c));
iter->count -= shorten;
- bio = bio_alloc_bioset(GFP_KERNEL,
- iov_iter_npages(iter, BIO_MAX_PAGES),
+ bio = bio_alloc_bioset(NULL,
+ bio_iov_vecs_to_alloc(iter, BIO_MAX_VECS),
+ REQ_OP_READ,
+ GFP_KERNEL,
&c->dio_read_bioset);
bio->bi_end_io = bch2_direct_IO_read_endio;
dio->req = req;
dio->ret = ret;
+ /*
+ * This is one of the sketchier things I've encountered: we have to skip
+ * the dirtying of requests that are internal from the kernel (i.e. from
+ * loopback), because we'll deadlock on page_lock.
+ */
+ dio->should_dirty = iter_is_iovec(iter);
goto start;
while (iter->count) {
- bio = bio_alloc_bioset(GFP_KERNEL,
- iov_iter_npages(iter, BIO_MAX_PAGES),
+ bio = bio_alloc_bioset(NULL,
+ bio_iov_vecs_to_alloc(iter, BIO_MAX_VECS),
+ REQ_OP_READ,
+ GFP_KERNEL,
&c->bio_read);
bio->bi_end_io = bch2_direct_IO_read_split_endio;
start:
}
offset += bio->bi_iter.bi_size;
- bio_set_pages_dirty(bio);
+
+ if (dio->should_dirty)
+ bio_set_pages_dirty(bio);
if (iter->count)
closure_get(&dio->cl);
- bch2_read(c, rbio_init(bio, opts), inode->v.i_ino);
+ bch2_read(c, rbio_init(bio, opts), inode_inum(inode));
}
iter->count += shorten;
closure_sync(&dio->cl);
closure_debug_destroy(&dio->cl);
ret = dio->ret;
- bio_check_pages_dirty(&dio->rbio.bio); /* transfers ownership */
+ bio_check_or_release(&dio->rbio.bio, dio->should_dirty);
return ret;
} else {
return -EIOCBQUEUED;
iocb->ki_pos,
iocb->ki_pos + count - 1);
if (ret < 0)
- return ret;
+ goto out;
file_accessed(file);
ret = generic_file_read_iter(iocb, iter);
bch2_pagecache_add_put(&inode->ei_pagecache_lock);
}
-
- return ret;
+out:
+ return bch2_err_class(ret);
}
/* O_DIRECT writes */
+static bool bch2_check_range_allocated(struct bch_fs *c, subvol_inum inum,
+ u64 offset, u64 size,
+ unsigned nr_replicas, bool compressed)
+{
+ struct btree_trans trans;
+ struct btree_iter iter;
+ struct bkey_s_c k;
+ u64 end = offset + size;
+ u32 snapshot;
+ bool ret = true;
+ int err;
+
+ bch2_trans_init(&trans, c, 0, 0);
+retry:
+ bch2_trans_begin(&trans);
+
+ err = bch2_subvolume_get_snapshot(&trans, inum.subvol, &snapshot);
+ if (err)
+ goto err;
+
+ for_each_btree_key_norestart(&trans, iter, BTREE_ID_extents,
+ SPOS(inum.inum, offset, snapshot),
+ BTREE_ITER_SLOTS, k, err) {
+ if (bkey_cmp(bkey_start_pos(k.k), POS(inum.inum, end)) >= 0)
+ break;
+
+ if (k.k->p.snapshot != snapshot ||
+ nr_replicas > bch2_bkey_replicas(c, k) ||
+ (!compressed && bch2_bkey_sectors_compressed(k))) {
+ ret = false;
+ break;
+ }
+ }
+
+ offset = iter.pos.offset;
+ bch2_trans_iter_exit(&trans, &iter);
+err:
+ if (bch2_err_matches(err, BCH_ERR_transaction_restart))
+ goto retry;
+ bch2_trans_exit(&trans);
+
+ return err ? false : ret;
+}
+
static void bch2_dio_write_loop_async(struct bch_write_op *);
static long bch2_dio_write_loop(struct dio_write *dio)
while (1) {
iter_count = dio->iter.count;
- if (kthread)
+ if (kthread && dio->mm)
kthread_use_mm(dio->mm);
BUG_ON(current->faults_disabled_mapping);
current->faults_disabled_mapping = mapping;
dropped_locks = fdm_dropped_locks();
current->faults_disabled_mapping = NULL;
- if (kthread)
+ if (kthread && dio->mm)
kthread_unuse_mm(dio->mm);
/*
* bio_iov_iter_get_pages was only able to get <
* blocksize worth of pages:
*/
- bio_for_each_segment_all(bv, bio, iter)
- put_page(bv->bv_page);
ret = -EFAULT;
goto err;
}
bch2_write_op_init(&dio->op, c, io_opts(c, &inode->ei_inode));
dio->op.end_io = bch2_dio_write_loop_async;
dio->op.target = dio->op.opts.foreground_target;
- op_journal_seq_set(&dio->op, &inode->ei_journal_seq);
dio->op.write_point = writepoint_hashed((unsigned long) current);
dio->op.nr_replicas = dio->op.opts.data_replicas;
+ dio->op.subvol = inode->ei_subvol;
dio->op.pos = POS(inode->v.i_ino, (u64) req->ki_pos >> 9);
if ((req->ki_flags & IOCB_DSYNC) &&
!c->opts.journal_flush_disabled)
dio->op.flags |= BCH_WRITE_FLUSH;
+ dio->op.flags |= BCH_WRITE_CHECK_ENOSPC;
ret = bch2_disk_reservation_get(c, &dio->op.res, bio_sectors(bio),
dio->op.opts.data_replicas, 0);
if (unlikely(ret) &&
- !bch2_check_range_allocated(c, dio->op.pos,
- bio_sectors(bio), dio->op.opts.data_replicas))
+ !bch2_check_range_allocated(c, inode_inum(inode),
+ dio->op.pos.offset, bio_sectors(bio),
+ dio->op.opts.data_replicas,
+ dio->op.opts.compression != 0))
goto err;
task_io_account_write(bio->bi_iter.bi_size);
i_size_write(&inode->v, req->ki_pos);
spin_unlock(&inode->v.i_lock);
- bio_for_each_segment_all(bv, bio, iter)
- put_page(bv->bv_page);
- if (!dio->iter.count || dio->op.error)
+ if (likely(!bio_flagged(bio, BIO_NO_PAGE_REF)))
+ bio_for_each_segment_all(bv, bio, iter)
+ put_page(bv->bv_page);
+ bio->bi_vcnt = 0;
+
+ if (dio->op.error) {
+ set_bit(EI_INODE_ERROR, &inode->ei_flags);
+ break;
+ }
+
+ if (!dio->iter.count)
break;
- bio_reset(bio);
+ bio_reset(bio, NULL, REQ_OP_WRITE);
reinit_completion(&dio->done);
}
if (dio->free_iov)
kfree(dio->iter.iov);
+ if (likely(!bio_flagged(bio, BIO_NO_PAGE_REF)))
+ bio_for_each_segment_all(bv, bio, iter)
+ put_page(bv->bv_page);
bio_put(bio);
/* inode->i_dio_count is our ref on inode and thus bch_fs */
inode_dio_end(&inode->v);
+ if (ret < 0)
+ ret = bch2_err_class(ret);
+
if (!sync) {
- req->ki_complete(req, ret, 0);
+ req->ki_complete(req, ret);
ret = -EIOCBQUEUED;
}
return ret;
locked = false;
}
- bio = bio_alloc_bioset(GFP_KERNEL,
- iov_iter_npages(iter, BIO_MAX_PAGES),
+ bio = bio_alloc_bioset(NULL,
+ bio_iov_vecs_to_alloc(iter, BIO_MAX_VECS),
+ REQ_OP_WRITE,
+ GFP_KERNEL,
&c->dio_write_bioset);
dio = container_of(bio, struct dio_write, op.wbio.bio);
init_completion(&dio->done);
struct bch_inode_info *inode = file_bch_inode(file);
ssize_t ret;
- if (iocb->ki_flags & IOCB_DIRECT)
- return bch2_direct_write(iocb, from);
+ if (iocb->ki_flags & IOCB_DIRECT) {
+ ret = bch2_direct_write(iocb, from);
+ goto out;
+ }
/* We can write back this queue in page reclaim */
current->backing_dev_info = inode_to_bdi(&inode->v);
if (ret > 0)
ret = generic_write_sync(iocb, ret);
-
- return ret;
+out:
+ return bch2_err_class(ret);
}
/* fsync: */
-int bch2_fsync(struct file *file, loff_t start, loff_t end, int datasync)
+/*
+ * inode->ei_inode.bi_journal_seq won't be up to date since it's set in an
+ * insert trigger: look up the btree inode instead
+ */
+static int bch2_flush_inode(struct bch_fs *c, subvol_inum inum)
{
- struct bch_inode_info *inode = file_bch_inode(file);
- struct bch_fs *c = inode->v.i_sb->s_fs_info;
- int ret, ret2;
+ struct bch_inode_unpacked inode;
+ int ret;
- ret = file_write_and_wait_range(file, start, end);
+ if (c->opts.journal_flush_disabled)
+ return 0;
+
+ ret = bch2_inode_find_by_inum(c, inum, &inode);
if (ret)
return ret;
- if (datasync && !(inode->v.i_state & I_DIRTY_DATASYNC))
- goto out;
+ return bch2_journal_flush_seq(&c->journal, inode.bi_journal_seq);
+}
- ret = sync_inode_metadata(&inode->v, 1);
- if (ret)
- return ret;
-out:
- if (!c->opts.journal_flush_disabled)
- ret = bch2_journal_flush_seq(&c->journal,
- inode->ei_journal_seq);
- ret2 = file_check_and_advance_wb_err(file);
+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;
+ int ret, ret2, ret3;
- return ret ?: ret2;
+ ret = file_write_and_wait_range(file, start, end);
+ ret2 = sync_inode_metadata(&inode->v, 1);
+ ret3 = bch2_flush_inode(c, inode_inum(inode));
+
+ return bch2_err_class(ret ?: ret2 ?: ret3);
}
/* truncate: */
-static inline int range_has_data(struct bch_fs *c,
- struct bpos start,
- struct bpos end)
+static inline int range_has_data(struct bch_fs *c, u32 subvol,
+ struct bpos start,
+ struct bpos end)
{
struct btree_trans trans;
- struct btree_iter *iter;
+ struct btree_iter iter;
struct bkey_s_c k;
int ret = 0;
bch2_trans_init(&trans, c, 0, 0);
+retry:
+ bch2_trans_begin(&trans);
- for_each_btree_key(&trans, iter, BTREE_ID_EXTENTS, start, 0, k, ret) {
+ ret = bch2_subvolume_get_snapshot(&trans, subvol, &start.snapshot);
+ if (ret)
+ goto err;
+
+ for_each_btree_key_norestart(&trans, iter, BTREE_ID_extents, start, 0, k, ret) {
if (bkey_cmp(bkey_start_pos(k.k), end) >= 0)
break;
break;
}
}
+ start = iter.pos;
+ bch2_trans_iter_exit(&trans, &iter);
+err:
+ if (bch2_err_matches(ret, BCH_ERR_transaction_restart))
+ goto retry;
- return bch2_trans_exit(&trans) ?: ret;
+ bch2_trans_exit(&trans);
+ return ret;
}
static int __bch2_truncate_page(struct bch_inode_info *inode,
unsigned end_offset = ((end - 1) & (PAGE_SIZE - 1)) + 1;
unsigned i;
struct page *page;
+ s64 i_sectors_delta = 0;
int ret = 0;
/* Page boundary? Nothing to do */
* 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));
+ ret = range_has_data(c, inode->ei_subvol,
+ POS(inode->v.i_ino, index << PAGE_SECTORS_SHIFT),
+ POS(inode->v.i_ino, (index + 1) << PAGE_SECTORS_SHIFT));
if (ret <= 0)
return ret;
i < round_down(end_offset, block_bytes(c)) >> 9;
i++) {
s->s[i].nr_replicas = 0;
+ if (s->s[i].state == SECTOR_DIRTY)
+ i_sectors_delta--;
s->s[i].state = SECTOR_UNALLOCATED;
}
+ i_sectors_acct(c, inode, NULL, i_sectors_delta);
+
+ /*
+ * Caller needs to know whether this page will be written out by
+ * writeback - doing an i_size update if necessary - or whether it will
+ * be responsible for the i_size update:
+ */
+ ret = s->s[(min_t(u64, inode->v.i_size - (index << PAGE_SHIFT),
+ PAGE_SIZE) - 1) >> 9].state >= SECTOR_DIRTY;
+
zero_user_segment(page, start_offset, end_offset);
/*
* 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_disk_reservation(c, inode, page, false);
- BUG_ON(ret);
+ BUG_ON(bch2_get_page_disk_reservation(c, inode, page, false));
/*
* This removes any writeable userspace mappings; we need to force
from, round_up(from, PAGE_SIZE));
}
-static int bch2_extend(struct bch_inode_info *inode,
+static int bch2_truncate_pages(struct bch_inode_info *inode,
+ loff_t start, loff_t end)
+{
+ int ret = __bch2_truncate_page(inode, start >> PAGE_SHIFT,
+ start, end);
+
+ if (ret >= 0 &&
+ start >> PAGE_SHIFT != end >> PAGE_SHIFT)
+ ret = __bch2_truncate_page(inode,
+ end >> PAGE_SHIFT,
+ start, end);
+ return ret;
+}
+
+static int bch2_extend(struct user_namespace *mnt_userns,
+ struct bch_inode_info *inode,
struct bch_inode_unpacked *inode_u,
struct iattr *iattr)
{
- struct bch_fs *c = inode->v.i_sb->s_fs_info;
struct address_space *mapping = inode->v.i_mapping;
int ret;
return ret;
truncate_setsize(&inode->v, iattr->ia_size);
- setattr_copy(&inode->v, iattr);
-
- mutex_lock(&inode->ei_update_lock);
- ret = bch2_write_inode_size(c, inode, inode->v.i_size,
- ATTR_MTIME|ATTR_CTIME);
- mutex_unlock(&inode->ei_update_lock);
- return ret;
+ return bch2_setattr_nonsize(mnt_userns, inode, iattr);
}
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;
}
return 0;
}
-int bch2_truncate(struct bch_inode_info *inode, struct iattr *iattr)
+int bch2_truncate(struct user_namespace *mnt_userns,
+ 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;
struct bch_inode_unpacked inode_u;
- struct btree_trans trans;
- struct btree_iter *iter;
u64 new_i_size = iattr->ia_size;
s64 i_sectors_delta = 0;
int ret = 0;
- inode_dio_wait(&inode->v);
- bch2_pagecache_block_get(&inode->ei_pagecache_lock);
-
/*
- * fetch current on disk i_size: inode is locked, i_size can only
- * increase underneath us:
+ * If the truncate call with change the size of the file, the
+ * cmtimes should be updated. If the size will not change, we
+ * do not need to update the cmtimes.
*/
- bch2_trans_init(&trans, c, 0, 0);
- iter = bch2_inode_peek(&trans, &inode_u, inode->v.i_ino, 0);
- ret = PTR_ERR_OR_ZERO(iter);
- bch2_trans_exit(&trans);
+ if (iattr->ia_size != inode->v.i_size) {
+ if (!(iattr->ia_valid & ATTR_MTIME))
+ ktime_get_coarse_real_ts64(&iattr->ia_mtime);
+ if (!(iattr->ia_valid & ATTR_CTIME))
+ ktime_get_coarse_real_ts64(&iattr->ia_ctime);
+ iattr->ia_valid |= ATTR_MTIME|ATTR_CTIME;
+ }
+
+ inode_dio_wait(&inode->v);
+ bch2_pagecache_block_get(&inode->ei_pagecache_lock);
+ ret = bch2_inode_find_by_inum(c, inode_inum(inode), &inode_u);
if (ret)
goto err;
if (ret)
goto err;
- BUG_ON(inode->v.i_size < inode_u.bi_size);
+ WARN_ON(!test_bit(EI_INODE_ERROR, &inode->ei_flags) &&
+ inode->v.i_size < inode_u.bi_size);
if (iattr->ia_size > inode->v.i_size) {
- ret = bch2_extend(inode, &inode_u, iattr);
+ ret = bch2_extend(mnt_userns, inode, &inode_u, iattr);
goto err;
}
+ iattr->ia_valid &= ~ATTR_SIZE;
+
ret = bch2_truncate_page(inode, iattr->ia_size);
- if (unlikely(ret))
+ if (unlikely(ret < 0))
goto err;
/*
truncate_setsize(&inode->v, iattr->ia_size);
- ret = bch2_fpunch(c, inode->v.i_ino,
+ ret = bch2_fpunch(c, inode_inum(inode),
round_up(iattr->ia_size, block_bytes(c)) >> 9,
- U64_MAX, &inode->ei_journal_seq, &i_sectors_delta);
+ U64_MAX, &i_sectors_delta);
i_sectors_acct(c, inode, NULL, i_sectors_delta);
+ bch2_fs_inconsistent_on(!inode->v.i_size && inode->v.i_blocks &&
+ !bch2_journal_error(&c->journal), c,
+ "inode %lu truncated to 0 but i_blocks %llu (ondisk %lli)",
+ inode->v.i_ino, (u64) inode->v.i_blocks,
+ inode->ei_inode.bi_sectors);
if (unlikely(ret))
goto err;
- setattr_copy(&inode->v, iattr);
-
mutex_lock(&inode->ei_update_lock);
- ret = bch2_write_inode(c, inode, bch2_truncate_finish_fn, NULL,
- ATTR_MTIME|ATTR_CTIME);
+ ret = bch2_write_inode(c, inode, bch2_truncate_finish_fn, NULL, 0);
mutex_unlock(&inode->ei_update_lock);
+
+ ret = bch2_setattr_nonsize(mnt_userns, inode, iattr);
err:
bch2_pagecache_block_put(&inode->ei_pagecache_lock);
- return ret;
+ return bch2_err_class(ret);
}
/* fallocate: */
+static int inode_update_times_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_mtime = bi->bi_ctime = bch2_current_time(c);
+ return 0;
+}
+
static long bchfs_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, block_bytes(c)) >> 9;
- u64 discard_end = round_down(offset + len, block_bytes(c)) >> 9;
+ u64 end = offset + len;
+ u64 block_start = round_up(offset, block_bytes(c));
+ u64 block_end = round_down(end, block_bytes(c));
+ bool truncated_last_page;
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))
+ ret = bch2_truncate_pages(inode, offset, end);
+ if (unlikely(ret < 0))
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;
- }
+ truncated_last_page = ret;
- truncate_pagecache_range(&inode->v, offset, offset + len - 1);
+ truncate_pagecache_range(&inode->v, offset, end - 1);
- if (discard_start < discard_end) {
+ if (block_start < block_end ) {
s64 i_sectors_delta = 0;
- ret = bch2_fpunch(c, inode->v.i_ino,
- discard_start, discard_end,
- &inode->ei_journal_seq,
+ ret = bch2_fpunch(c, inode_inum(inode),
+ block_start >> 9, block_end >> 9,
&i_sectors_delta);
i_sectors_acct(c, inode, NULL, i_sectors_delta);
}
-err:
- bch2_pagecache_block_put(&inode->ei_pagecache_lock);
- inode_unlock(&inode->v);
+ mutex_lock(&inode->ei_update_lock);
+ if (end >= inode->v.i_size && !truncated_last_page) {
+ ret = bch2_write_inode_size(c, inode, inode->v.i_size,
+ ATTR_MTIME|ATTR_CTIME);
+ } else {
+ ret = bch2_write_inode(c, inode, inode_update_times_fn, NULL,
+ ATTR_MTIME|ATTR_CTIME);
+ }
+ mutex_unlock(&inode->ei_update_lock);
+err:
return ret;
}
{
struct bch_fs *c = inode->v.i_sb->s_fs_info;
struct address_space *mapping = inode->v.i_mapping;
- struct bkey_on_stack copy;
+ struct bkey_buf copy;
struct btree_trans trans;
- struct btree_iter *src, *dst;
+ struct btree_iter src, dst, del;
loff_t shift, new_size;
u64 src_start;
- int ret;
+ int ret = 0;
if ((offset | len) & (block_bytes(c) - 1))
return -EINVAL;
- bkey_on_stack_init(©);
- bch2_trans_init(&trans, c, BTREE_ITER_MAX, 256);
-
- /*
- * 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);
-
if (insert) {
- ret = -EFBIG;
if (inode->v.i_sb->s_maxbytes - inode->v.i_size < len)
- goto err;
+ return -EFBIG;
- ret = -EINVAL;
if (offset >= inode->v.i_size)
- goto err;
+ return -EINVAL;
src_start = U64_MAX;
shift = len;
} else {
- ret = -EINVAL;
if (offset + len >= inode->v.i_size)
- goto err;
+ return -EINVAL;
src_start = offset + len;
shift = -len;
ret = write_invalidate_inode_pages_range(mapping, offset, LLONG_MAX);
if (ret)
- goto err;
+ return ret;
if (insert) {
i_size_write(&inode->v, new_size);
} else {
s64 i_sectors_delta = 0;
- ret = bch2_fpunch(c, inode->v.i_ino,
+ ret = bch2_fpunch(c, inode_inum(inode),
offset >> 9, (offset + len) >> 9,
- &inode->ei_journal_seq,
&i_sectors_delta);
i_sectors_acct(c, inode, NULL, i_sectors_delta);
if (ret)
- goto err;
+ return ret;
}
- src = bch2_trans_get_iter(&trans, BTREE_ID_EXTENTS,
+ bch2_bkey_buf_init(©);
+ bch2_trans_init(&trans, c, BTREE_ITER_MAX, 1024);
+ bch2_trans_iter_init(&trans, &src, BTREE_ID_extents,
POS(inode->v.i_ino, src_start >> 9),
BTREE_ITER_INTENT);
- dst = bch2_trans_copy_iter(&trans, src);
+ bch2_trans_copy_iter(&dst, &src);
+ bch2_trans_copy_iter(&del, &src);
- while (1) {
+ while (ret == 0 ||
+ bch2_err_matches(ret, BCH_ERR_transaction_restart)) {
struct disk_reservation disk_res =
bch2_disk_reservation_init(c, 0);
struct bkey_i delete;
struct bpos move_pos = POS(inode->v.i_ino, offset >> 9);
struct bpos atomic_end;
unsigned trigger_flags = 0;
+ u32 snapshot;
+
+ bch2_trans_begin(&trans);
+
+ ret = bch2_subvolume_get_snapshot(&trans,
+ inode->ei_subvol, &snapshot);
+ if (ret)
+ continue;
+
+ bch2_btree_iter_set_snapshot(&src, snapshot);
+ bch2_btree_iter_set_snapshot(&dst, snapshot);
+ bch2_btree_iter_set_snapshot(&del, snapshot);
+
+ bch2_trans_begin(&trans);
k = insert
- ? bch2_btree_iter_peek_prev(src)
- : bch2_btree_iter_peek(src);
+ ? bch2_btree_iter_peek_prev(&src)
+ : bch2_btree_iter_peek(&src);
if ((ret = bkey_err(k)))
- goto bkey_err;
+ continue;
if (!k.k || k.k->p.inode != inode->v.i_ino)
break;
- BUG_ON(bkey_cmp(src->pos, bkey_start_pos(k.k)));
-
if (insert &&
bkey_cmp(k.k->p, POS(inode->v.i_ino, offset >> 9)) <= 0)
break;
reassemble:
- bkey_on_stack_reassemble(©, c, k);
+ bch2_bkey_buf_reassemble(©, c, k);
if (insert &&
bkey_cmp(bkey_start_pos(k.k), move_pos) < 0)
bch2_cut_front(move_pos, copy.k);
copy.k->k.p.offset += shift >> 9;
- bch2_btree_iter_set_pos(dst, bkey_start_pos(©.k->k));
+ bch2_btree_iter_set_pos(&dst, bkey_start_pos(©.k->k));
- ret = bch2_extent_atomic_end(dst, copy.k, &atomic_end);
+ ret = bch2_extent_atomic_end(&trans, &dst, copy.k, &atomic_end);
if (ret)
- goto bkey_err;
+ continue;
if (bkey_cmp(atomic_end, copy.k->k.p)) {
if (insert) {
delete.k.p = copy.k->k.p;
delete.k.size = copy.k->k.size;
delete.k.p.offset -= shift >> 9;
+ bch2_btree_iter_set_pos(&del, bkey_start_pos(&delete.k));
next_pos = insert ? bkey_start_pos(&delete.k) : delete.k.p;
- if (copy.k->k.size == k.k->size) {
- /*
- * If we're moving the entire extent, we can skip
- * running triggers:
- */
- trigger_flags |= BTREE_TRIGGER_NORUN;
- } else {
+ if (copy.k->k.size != k.k->size) {
/* We might end up splitting compressed extents: */
unsigned nr_ptrs =
bch2_bkey_nr_ptrs_allocated(bkey_i_to_s_c(copy.k));
BUG_ON(ret);
}
- bch2_btree_iter_set_pos(src, bkey_start_pos(&delete.k));
-
- ret = bch2_trans_update(&trans, src, &delete, trigger_flags) ?:
- bch2_trans_update(&trans, dst, copy.k, trigger_flags) ?:
- bch2_trans_commit(&trans, &disk_res,
- &inode->ei_journal_seq,
+ ret = bch2_btree_iter_traverse(&del) ?:
+ bch2_trans_update(&trans, &del, &delete, trigger_flags) ?:
+ bch2_trans_update(&trans, &dst, copy.k, trigger_flags) ?:
+ bch2_trans_commit(&trans, &disk_res, NULL,
BTREE_INSERT_NOFAIL);
bch2_disk_reservation_put(c, &disk_res);
-bkey_err:
- if (!ret)
- bch2_btree_iter_set_pos(src, next_pos);
-
- if (ret == -EINTR)
- ret = 0;
- if (ret)
- goto err;
- bch2_trans_cond_resched(&trans);
+ if (!ret)
+ bch2_btree_iter_set_pos(&src, next_pos);
}
- bch2_trans_unlock(&trans);
+ bch2_trans_iter_exit(&trans, &del);
+ bch2_trans_iter_exit(&trans, &dst);
+ bch2_trans_iter_exit(&trans, &src);
+ bch2_trans_exit(&trans);
+ bch2_bkey_buf_exit(©, c);
+
+ if (ret)
+ return ret;
+ mutex_lock(&inode->ei_update_lock);
if (!insert) {
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);
+ } else {
+ /* We need an inode update to update bi_journal_seq for fsync: */
+ ret = bch2_write_inode(c, inode, inode_update_times_fn, NULL,
+ ATTR_MTIME|ATTR_CTIME);
}
-err:
- bch2_trans_exit(&trans);
- bkey_on_stack_exit(©, c);
- bch2_pagecache_block_put(&inode->ei_pagecache_lock);
- inode_unlock(&inode->v);
+ mutex_unlock(&inode->ei_update_lock);
return ret;
}
-static long bchfs_fallocate(struct bch_inode_info *inode, int mode,
- loff_t offset, loff_t len)
+static int __bchfs_fallocate(struct bch_inode_info *inode, int mode,
+ u64 start_sector, u64 end_sector)
{
- struct address_space *mapping = inode->v.i_mapping;
struct bch_fs *c = inode->v.i_sb->s_fs_info;
struct btree_trans trans;
- struct btree_iter *iter;
- struct bpos end_pos;
- loff_t end = offset + len;
- loff_t block_start = round_down(offset, block_bytes(c));
- loff_t block_end = round_up(end, block_bytes(c));
- unsigned sectors;
+ struct btree_iter iter;
+ struct bpos end_pos = POS(inode->v.i_ino, end_sector);
unsigned replicas = io_opts(c, &inode->ei_inode).data_replicas;
- int ret;
-
- bch2_trans_init(&trans, c, BTREE_ITER_MAX, 0);
-
- 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;
+ int ret = 0;
- truncate_pagecache_range(&inode->v, offset, end - 1);
- }
+ bch2_trans_init(&trans, c, BTREE_ITER_MAX, 512);
- iter = bch2_trans_get_iter(&trans, BTREE_ID_EXTENTS,
- POS(inode->v.i_ino, block_start >> 9),
+ bch2_trans_iter_init(&trans, &iter, BTREE_ID_extents,
+ POS(inode->v.i_ino, start_sector),
BTREE_ITER_SLOTS|BTREE_ITER_INTENT);
- end_pos = POS(inode->v.i_ino, block_end >> 9);
- while (bkey_cmp(iter->pos, end_pos) < 0) {
+ while (!ret && bkey_cmp(iter.pos, end_pos) < 0) {
s64 i_sectors_delta = 0;
struct disk_reservation disk_res = { 0 };
struct quota_res quota_res = { 0 };
struct bkey_i_reservation reservation;
struct bkey_s_c k;
+ unsigned sectors;
+ u32 snapshot;
bch2_trans_begin(&trans);
- k = bch2_btree_iter_peek_slot(iter);
+ ret = bch2_subvolume_get_snapshot(&trans,
+ inode->ei_subvol, &snapshot);
+ if (ret)
+ goto bkey_err;
+
+ bch2_btree_iter_set_snapshot(&iter, snapshot);
+
+ k = bch2_btree_iter_peek_slot(&iter);
if ((ret = bkey_err(k)))
goto bkey_err;
/* already reserved */
if (k.k->type == KEY_TYPE_reservation &&
bkey_s_c_to_reservation(k).v->nr_replicas >= replicas) {
- bch2_btree_iter_next_slot(iter);
+ bch2_btree_iter_advance(&iter);
continue;
}
if (bkey_extent_is_data(k.k) &&
!(mode & FALLOC_FL_ZERO_RANGE)) {
- bch2_btree_iter_next_slot(iter);
+ bch2_btree_iter_advance(&iter);
continue;
}
reservation.k.p = k.k->p;
reservation.k.size = k.k->size;
- bch2_cut_front(iter->pos, &reservation.k_i);
+ bch2_cut_front(iter.pos, &reservation.k_i);
bch2_cut_back(end_pos, &reservation.k_i);
sectors = reservation.k.size;
reservation.v.nr_replicas = disk_res.nr_replicas;
}
- ret = bch2_extent_update(&trans, iter, &reservation.k_i,
- &disk_res, &inode->ei_journal_seq,
- 0, &i_sectors_delta);
+ ret = bch2_extent_update(&trans, inode_inum(inode), &iter,
+ &reservation.k_i,
+ &disk_res, NULL,
+ 0, &i_sectors_delta, true);
+ if (ret)
+ goto bkey_err;
i_sectors_acct(c, inode, "a_res, i_sectors_delta);
bkey_err:
bch2_quota_reservation_put(c, inode, "a_res);
bch2_disk_reservation_put(c, &disk_res);
- if (ret == -EINTR)
+ if (bch2_err_matches(ret, BCH_ERR_transaction_restart))
ret = 0;
- if (ret)
- goto err;
}
- /*
- * Do we need to extend the file?
- *
- * If we zeroed up to the end of the file, we dropped whatever writes
- * were going to write out the current i_size, so we have to extend
- * manually even if FL_KEEP_SIZE was set:
- */
- if (end >= inode->v.i_size &&
- (!(mode & FALLOC_FL_KEEP_SIZE) ||
- (mode & FALLOC_FL_ZERO_RANGE))) {
- struct btree_iter *inode_iter;
- struct bch_inode_unpacked inode_u;
+ bch2_trans_unlock(&trans); /* lock ordering, before taking pagecache locks: */
+ mark_pagecache_reserved(inode, start_sector, iter.pos.offset);
- do {
- bch2_trans_begin(&trans);
- inode_iter = bch2_inode_peek(&trans, &inode_u,
- inode->v.i_ino, 0);
- ret = PTR_ERR_OR_ZERO(inode_iter);
- } while (ret == -EINTR);
+ if (bch2_err_matches(ret, ENOSPC) && (mode & FALLOC_FL_ZERO_RANGE)) {
+ struct quota_res quota_res = { 0 };
+ s64 i_sectors_delta = 0;
- bch2_trans_unlock(&trans);
+ bch2_fpunch_at(&trans, &iter, inode_inum(inode),
+ end_sector, &i_sectors_delta);
+ i_sectors_acct(c, inode, "a_res, i_sectors_delta);
+ bch2_quota_reservation_put(c, inode, "a_res);
+ }
- if (ret)
- goto err;
+ bch2_trans_iter_exit(&trans, &iter);
+ bch2_trans_exit(&trans);
+ return ret;
+}
- /*
- * Sync existing appends before extending i_size,
- * as in bch2_extend():
- */
- ret = filemap_write_and_wait_range(mapping,
- inode_u.bi_size, S64_MAX);
+static long bchfs_fallocate(struct bch_inode_info *inode, int mode,
+ loff_t offset, loff_t len)
+{
+ struct bch_fs *c = inode->v.i_sb->s_fs_info;
+ u64 end = offset + len;
+ u64 block_start = round_down(offset, block_bytes(c));
+ u64 block_end = round_up(end, block_bytes(c));
+ bool truncated_last_page = false;
+ int ret, ret2 = 0;
+
+ if (!(mode & FALLOC_FL_KEEP_SIZE) && end > inode->v.i_size) {
+ ret = inode_newsize_ok(&inode->v, end);
if (ret)
- goto err;
+ return ret;
+ }
- if (mode & FALLOC_FL_KEEP_SIZE)
- end = inode->v.i_size;
- else
- i_size_write(&inode->v, end);
+ if (mode & FALLOC_FL_ZERO_RANGE) {
+ ret = bch2_truncate_pages(inode, offset, end);
+ if (unlikely(ret < 0))
+ return ret;
+
+ truncated_last_page = ret;
+
+ truncate_pagecache_range(&inode->v, offset, end - 1);
+
+ block_start = round_up(offset, block_bytes(c));
+ block_end = round_down(end, block_bytes(c));
+ }
+
+ ret = __bchfs_fallocate(inode, mode, block_start >> 9, block_end >> 9);
+
+ /*
+ * On -ENOSPC in ZERO_RANGE mode, we still want to do the inode update,
+ * so that the VFS cache i_size is consistent with the btree i_size:
+ */
+ if (ret &&
+ !(bch2_err_matches(ret, ENOSPC) && (mode & FALLOC_FL_ZERO_RANGE)))
+ return ret;
+
+ if (mode & FALLOC_FL_KEEP_SIZE && end > inode->v.i_size)
+ end = inode->v.i_size;
+
+ if (end >= inode->v.i_size &&
+ (((mode & FALLOC_FL_ZERO_RANGE) && !truncated_last_page) ||
+ !(mode & FALLOC_FL_KEEP_SIZE))) {
+ spin_lock(&inode->v.i_lock);
+ i_size_write(&inode->v, end);
+ spin_unlock(&inode->v.i_lock);
mutex_lock(&inode->ei_update_lock);
- ret = bch2_write_inode_size(c, inode, end, 0);
+ ret2 = bch2_write_inode_size(c, inode, end, 0);
mutex_unlock(&inode->ei_update_lock);
}
-err:
- bch2_trans_exit(&trans);
- bch2_pagecache_block_put(&inode->ei_pagecache_lock);
- inode_unlock(&inode->v);
- return ret;
+
+ return ret ?: ret2;
}
long bch2_fallocate_dispatch(struct file *file, int mode,
struct bch_fs *c = inode->v.i_sb->s_fs_info;
long ret;
- if (!percpu_ref_tryget(&c->writes))
+ if (!percpu_ref_tryget_live(&c->writes))
return -EROFS;
+ inode_lock(&inode->v);
+ inode_dio_wait(&inode->v);
+ bch2_pagecache_block_get(&inode->ei_pagecache_lock);
+
+ ret = file_modified(file);
+ if (ret)
+ goto err;
+
if (!(mode & ~(FALLOC_FL_KEEP_SIZE|FALLOC_FL_ZERO_RANGE)))
ret = bchfs_fallocate(inode, mode, offset, len);
else if (mode == (FALLOC_FL_PUNCH_HOLE|FALLOC_FL_KEEP_SIZE))
ret = bchfs_fcollapse_finsert(inode, offset, len, false);
else
ret = -EOPNOTSUPP;
-
+err:
+ bch2_pagecache_block_put(&inode->ei_pagecache_lock);
+ inode_unlock(&inode->v);
percpu_ref_put(&c->writes);
- return ret;
+ return bch2_err_class(ret);
}
-static void mark_range_unallocated(struct bch_inode_info *inode,
- loff_t start, loff_t end)
+static int quota_reserve_range(struct bch_inode_info *inode,
+ struct quota_res *res,
+ u64 start, u64 end)
{
- pgoff_t index = start >> PAGE_SHIFT;
- pgoff_t end_index = (end - 1) >> PAGE_SHIFT;
- struct pagevec pvec;
-
- pagevec_init(&pvec);
+ struct bch_fs *c = inode->v.i_sb->s_fs_info;
+ struct btree_trans trans;
+ struct btree_iter iter;
+ struct bkey_s_c k;
+ u32 snapshot;
+ u64 sectors = end - start;
+ u64 pos = start;
+ int ret;
- do {
- unsigned nr_pages, i, j;
+ bch2_trans_init(&trans, c, 0, 0);
+retry:
+ bch2_trans_begin(&trans);
- nr_pages = pagevec_lookup_range(&pvec, inode->v.i_mapping,
- &index, end_index);
- if (nr_pages == 0)
- break;
+ ret = bch2_subvolume_get_snapshot(&trans, inode->ei_subvol, &snapshot);
+ if (ret)
+ goto err;
- for (i = 0; i < nr_pages; i++) {
- struct page *page = pvec.pages[i];
- struct bch_page_state *s;
+ bch2_trans_iter_init(&trans, &iter, BTREE_ID_extents,
+ SPOS(inode->v.i_ino, pos, snapshot), 0);
+
+ while (!(ret = btree_trans_too_many_iters(&trans)) &&
+ (k = bch2_btree_iter_peek_upto(&iter, POS(inode->v.i_ino, end - 1))).k &&
+ !(ret = bkey_err(k))) {
+ if (bkey_extent_is_allocation(k.k)) {
+ u64 s = min(end, k.k->p.offset) -
+ max(start, bkey_start_offset(k.k));
+ BUG_ON(s > sectors);
+ sectors -= s;
+ }
+ bch2_btree_iter_advance(&iter);
+ }
+ pos = iter.pos.offset;
+ bch2_trans_iter_exit(&trans, &iter);
+err:
+ if (bch2_err_matches(ret, BCH_ERR_transaction_restart))
+ goto retry;
- lock_page(page);
- s = bch2_page_state(page);
+ bch2_trans_exit(&trans);
- if (s) {
- spin_lock(&s->lock);
- for (j = 0; j < PAGE_SECTORS; j++)
- s->s[j].nr_replicas = 0;
- spin_unlock(&s->lock);
- }
+ if (ret)
+ return ret;
- unlock_page(page);
- }
- pagevec_release(&pvec);
- } while (index <= end_index);
+ return bch2_quota_reservation_add(c, inode, res, sectors, true);
}
loff_t bch2_remap_file_range(struct file *file_src, loff_t pos_src,
struct bch_inode_info *src = file_bch_inode(file_src);
struct bch_inode_info *dst = file_bch_inode(file_dst);
struct bch_fs *c = src->v.i_sb->s_fs_info;
+ struct quota_res quota_res = { 0 };
s64 i_sectors_delta = 0;
u64 aligned_len;
loff_t ret = 0;
- if (!c->opts.reflink)
- return -EOPNOTSUPP;
-
if (remap_flags & ~(REMAP_FILE_DEDUP|REMAP_FILE_ADVISORY))
return -EINVAL;
bch2_lock_inodes(INODE_LOCK|INODE_PAGECACHE_BLOCK, src, dst);
- file_update_time(file_dst);
-
inode_dio_wait(&src->v);
inode_dio_wait(&dst->v);
if (ret)
goto err;
- mark_range_unallocated(src, pos_src, pos_src + aligned_len);
+ ret = quota_reserve_range(dst, "a_res, pos_dst >> 9,
+ (pos_dst + aligned_len) >> 9);
+ if (ret)
+ goto err;
+
+ file_update_time(file_dst);
+
+ mark_pagecache_unallocated(src, pos_src >> 9,
+ (pos_src + aligned_len) >> 9);
ret = bch2_remap_range(c,
- POS(dst->v.i_ino, pos_dst >> 9),
- POS(src->v.i_ino, pos_src >> 9),
+ inode_inum(dst), pos_dst >> 9,
+ inode_inum(src), pos_src >> 9,
aligned_len >> 9,
- &dst->ei_journal_seq,
pos_dst + len, &i_sectors_delta);
if (ret < 0)
goto err;
*/
ret = min((u64) ret << 9, (u64) len);
- /* XXX get a quota reservation */
- i_sectors_acct(c, dst, NULL, i_sectors_delta);
+ i_sectors_acct(c, dst, "a_res, i_sectors_delta);
spin_lock(&dst->v.i_lock);
if (pos_dst + ret > dst->v.i_size)
i_size_write(&dst->v, pos_dst + ret);
spin_unlock(&dst->v.i_lock);
+
+ if ((file_dst->f_flags & (__O_SYNC | O_DSYNC)) ||
+ IS_SYNC(file_inode(file_dst)))
+ ret = bch2_flush_inode(c, inode_inum(dst));
err:
+ bch2_quota_reservation_put(c, dst, "a_res);
bch2_unlock_inodes(INODE_LOCK|INODE_PAGECACHE_BLOCK, src, dst);
- return ret;
+ return bch2_err_class(ret);
}
/* fseek: */
loff_t start_offset,
loff_t end_offset)
{
- struct address_space *mapping = vinode->i_mapping;
- struct page *page;
+ 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;
loff_t ret;
int offset;
- while (index <= end_index) {
- if (find_get_pages_range(mapping, &index, end_index, 1, &page)) {
- lock_page(page);
+ 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);
- offset = page_data_offset(page,
- page->index == start_index
+ offset = page_data_offset(&folio->page,
+ folio->index == start_index
? start_offset & (PAGE_SIZE - 1)
: 0);
if (offset >= 0) {
- ret = clamp(((loff_t) page->index << PAGE_SHIFT) +
+ ret = clamp(((loff_t) folio->index << PAGE_SHIFT) +
offset,
start_offset, end_offset);
- unlock_page(page);
- put_page(page);
+ folio_unlock(folio);
+ folio_batch_release(&fbatch);
return ret;
}
- unlock_page(page);
- put_page(page);
- } else {
- break;
+ folio_unlock(folio);
}
+ folio_batch_release(&fbatch);
+ cond_resched();
}
return end_offset;
struct bch_inode_info *inode = file_bch_inode(file);
struct bch_fs *c = inode->v.i_sb->s_fs_info;
struct btree_trans trans;
- struct btree_iter *iter;
+ struct btree_iter iter;
struct bkey_s_c k;
+ subvol_inum inum = inode_inum(inode);
u64 isize, next_data = MAX_LFS_FILESIZE;
+ u32 snapshot;
int ret;
isize = i_size_read(&inode->v);
return -ENXIO;
bch2_trans_init(&trans, c, 0, 0);
+retry:
+ bch2_trans_begin(&trans);
+
+ ret = bch2_subvolume_get_snapshot(&trans, inum.subvol, &snapshot);
+ if (ret)
+ goto err;
- for_each_btree_key(&trans, iter, BTREE_ID_EXTENTS,
- POS(inode->v.i_ino, offset >> 9), 0, k, ret) {
+ for_each_btree_key_norestart(&trans, iter, BTREE_ID_extents,
+ SPOS(inode->v.i_ino, offset >> 9, snapshot), 0, k, ret) {
if (k.k->p.inode != inode->v.i_ino) {
break;
} else if (bkey_extent_is_data(k.k)) {
} else if (k.k->p.offset >> 9 > isize)
break;
}
+ bch2_trans_iter_exit(&trans, &iter);
+err:
+ if (bch2_err_matches(ret, BCH_ERR_transaction_restart))
+ goto retry;
- ret = bch2_trans_exit(&trans) ?: ret;
+ bch2_trans_exit(&trans);
if (ret)
return ret;
int pg_offset;
loff_t ret = -1;
- page = find_lock_entry(mapping, index);
- if (!page || xa_is_value(page))
+ page = find_lock_page(mapping, index);
+ if (!page)
return offset;
pg_offset = __page_hole_offset(page, offset & (PAGE_SIZE - 1));
struct bch_inode_info *inode = file_bch_inode(file);
struct bch_fs *c = inode->v.i_sb->s_fs_info;
struct btree_trans trans;
- struct btree_iter *iter;
+ struct btree_iter iter;
struct bkey_s_c k;
+ subvol_inum inum = inode_inum(inode);
u64 isize, next_hole = MAX_LFS_FILESIZE;
+ u32 snapshot;
int ret;
isize = i_size_read(&inode->v);
return -ENXIO;
bch2_trans_init(&trans, c, 0, 0);
+retry:
+ bch2_trans_begin(&trans);
- for_each_btree_key(&trans, iter, BTREE_ID_EXTENTS,
- POS(inode->v.i_ino, offset >> 9),
+ ret = bch2_subvolume_get_snapshot(&trans, inum.subvol, &snapshot);
+ if (ret)
+ goto err;
+
+ for_each_btree_key_norestart(&trans, iter, BTREE_ID_extents,
+ SPOS(inode->v.i_ino, offset >> 9, snapshot),
BTREE_ITER_SLOTS, k, ret) {
if (k.k->p.inode != inode->v.i_ino) {
next_hole = bch2_seek_pagecache_hole(&inode->v,
offset = max(offset, bkey_start_offset(k.k) << 9);
}
}
+ bch2_trans_iter_exit(&trans, &iter);
+err:
+ if (bch2_err_matches(ret, BCH_ERR_transaction_restart))
+ goto retry;
- ret = bch2_trans_exit(&trans) ?: ret;
+ bch2_trans_exit(&trans);
if (ret)
return ret;
loff_t bch2_llseek(struct file *file, loff_t offset, int whence)
{
+ loff_t ret;
+
switch (whence) {
case SEEK_SET:
case SEEK_CUR:
case SEEK_END:
- return generic_file_llseek(file, offset, whence);
+ ret = generic_file_llseek(file, offset, whence);
+ break;
case SEEK_DATA:
- return bch2_seek_data(file, offset);
+ ret = bch2_seek_data(file, offset);
+ break;
case SEEK_HOLE:
- return bch2_seek_hole(file, offset);
+ ret = bch2_seek_hole(file, offset);
+ break;
+ default:
+ ret = -EINVAL;
+ break;
}
- return -EINVAL;
+ return bch2_err_class(ret);
}
void bch2_fs_fsio_exit(struct bch_fs *c)
projects / bcachefs-tools-debian / blobdiff