#include "bcachefs.h"
#include "alloc_foreground.h"
+#include "bkey_on_stack.h"
#include "btree_update.h"
#include "buckets.h"
#include "clock.h"
#include "error.h"
#include "extents.h"
+#include "extent_update.h"
#include "fs.h"
#include "fs-io.h"
#include "fsck.h"
u64 sectors;
};
-struct bchfs_write_op {
- struct bch_inode_info *inode;
- s64 sectors_added;
- bool is_dio;
- bool unalloc;
- u64 new_i_size;
-
- /* must be last: */
- struct bch_write_op op;
-};
-
struct bch_writepage_io {
struct closure cl;
- u64 new_sectors;
+ struct bch_inode_info *inode;
/* must be last: */
- struct bchfs_write_op op;
+ struct bch_write_op op;
};
struct dio_write {
- struct closure cl;
+ struct completion done;
struct kiocb *req;
struct mm_struct *mm;
unsigned loop:1,
struct iovec inline_vecs[2];
/* must be last: */
- struct bchfs_write_op iop;
+ struct bch_write_op op;
};
struct dio_read {
mutex_unlock(&inode->ei_quota_lock);
}
-/* normal i_size/i_sectors update machinery: */
-
-static int sum_sector_overwrites(struct btree_trans *trans,
- struct btree_iter *extent_iter,
- struct bkey_i *new,
- bool may_allocate,
- s64 *delta)
-{
- struct btree_iter *iter;
- struct bkey_s_c old;
- int ret = 0;
-
- *delta = 0;
-
- iter = bch2_trans_copy_iter(trans, extent_iter);
- if (IS_ERR(iter))
- return PTR_ERR(iter);
-
- for_each_btree_key_continue(iter, BTREE_ITER_SLOTS, old, ret) {
- if (!may_allocate &&
- bch2_bkey_nr_ptrs_allocated(old) <
- bch2_bkey_nr_dirty_ptrs(bkey_i_to_s_c(new))) {
- ret = -ENOSPC;
- break;
- }
-
- *delta += (min(new->k.p.offset,
- old.k->p.offset) -
- max(bkey_start_offset(&new->k),
- bkey_start_offset(old.k))) *
- (bkey_extent_is_allocation(&new->k) -
- bkey_extent_is_allocation(old.k));
-
- if (bkey_cmp(old.k->p, new->k.p) >= 0)
- break;
- }
-
- bch2_trans_iter_put(trans, iter);
- return ret;
-}
-
-int bch2_extent_update(struct btree_trans *trans,
- struct bch_inode_info *inode,
- struct disk_reservation *disk_res,
- struct quota_res *quota_res,
- struct btree_iter *extent_iter,
- struct bkey_i *k,
- u64 new_i_size,
- bool may_allocate,
- bool direct,
- s64 *total_delta)
-{
- struct bch_fs *c = trans->c;
- struct btree_iter *inode_iter = NULL;
- struct bch_inode_unpacked inode_u;
- struct bkey_inode_buf inode_p;
- bool extended = false;
- s64 i_sectors_delta;
- int ret;
-
- ret = bch2_btree_iter_traverse(extent_iter);
- if (ret)
- return ret;
-
- ret = bch2_extent_trim_atomic(k, extent_iter);
- if (ret)
- return ret;
-
- ret = sum_sector_overwrites(trans, extent_iter, k,
- may_allocate, &i_sectors_delta);
- if (ret)
- return ret;
-
- bch2_trans_update(trans, extent_iter, k);
-
- new_i_size = min(k->k.p.offset << 9, new_i_size);
-
- /* XXX: inode->i_size locking */
- if (i_sectors_delta ||
- new_i_size > inode->ei_inode.bi_size) {
- inode_iter = bch2_inode_peek(trans, &inode_u,
- k->k.p.inode, BTREE_ITER_INTENT);
- if (IS_ERR(inode_iter))
- return PTR_ERR(inode_iter);
-
- inode_u.bi_sectors += i_sectors_delta;
-
- /*
- * XXX: can BCH_INODE_I_SIZE_DIRTY be true here? i.e. can we
- * race with truncate?
- */
- if (!(inode_u.bi_flags & BCH_INODE_I_SIZE_DIRTY) &&
- new_i_size > inode_u.bi_size) {
- inode_u.bi_size = new_i_size;
- extended = true;
- }
-
- if (i_sectors_delta || extended) {
- bch2_inode_pack(&inode_p, &inode_u);
- bch2_trans_update(trans, inode_iter,
- &inode_p.inode.k_i);
- }
- }
-
- ret = bch2_trans_commit(trans, disk_res,
- &inode->ei_journal_seq,
- BTREE_INSERT_NOFAIL|
- BTREE_INSERT_ATOMIC|
- BTREE_INSERT_NOUNLOCK|
- BTREE_INSERT_USE_RESERVE);
- if (ret)
- goto err;
-
- if (i_sectors_delta || extended) {
- inode->ei_inode.bi_sectors = inode_u.bi_sectors;
- inode->ei_inode.bi_size = inode_u.bi_size;
- }
-
- if (direct)
- i_sectors_acct(c, inode, quota_res, i_sectors_delta);
- if (direct && extended) {
- spin_lock(&inode->v.i_lock);
- if (new_i_size > inode->v.i_size)
- i_size_write(&inode->v, new_i_size);
- spin_unlock(&inode->v.i_lock);
- }
-
- 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;
-}
-
-static int bchfs_write_index_update(struct bch_write_op *wop)
-{
- struct bch_fs *c = wop->c;
- struct bchfs_write_op *op = container_of(wop,
- struct bchfs_write_op, op);
- 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;
- struct keylist *keys = &op->op.insert_keys;
- struct bkey_i *k = bch2_keylist_front(keys);
- struct btree_trans trans;
- struct btree_iter *iter;
- int ret;
-
- BUG_ON(k->k.p.inode != inode->v.i_ino);
-
- bch2_trans_init(&trans, c, BTREE_ITER_MAX, 1024);
-
- iter = bch2_trans_get_iter(&trans, BTREE_ID_EXTENTS,
- bkey_start_pos(&k->k),
- BTREE_ITER_SLOTS|BTREE_ITER_INTENT);
-
- do {
- BKEY_PADDED(k) tmp;
-
- bkey_copy(&tmp.k, bch2_keylist_front(keys));
-
- bch2_trans_begin_updates(&trans);
-
- 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);
- if (ret == -EINTR)
- continue;
- if (ret)
- break;
-
- if (bkey_cmp(iter->pos, bch2_keylist_front(keys)->k.p) < 0)
- bch2_cut_front(iter->pos, bch2_keylist_front(keys));
- else
- bch2_keylist_pop_front(keys);
- } while (!bch2_keylist_empty(keys));
-
- bch2_trans_exit(&trans);
-
- 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: */
};
struct bch_page_state {
+ spinlock_t lock;
atomic_t write_count;
struct bch_page_sector s[PAGE_SECTORS];
};
if (!s)
return NULL;
+ spin_lock_init(&s->lock);
/*
* migrate_page_move_mapping() assumes that pages with private data
* have their count elevated by 1.
if (!s)
return;
+ EBUG_ON(!PageLocked(page));
+ EBUG_ON(PageWriteback(page));
+
for (i = 0; i < ARRAY_SIZE(s->s); i++) {
disk_res.sectors += s->s[i].replicas_reserved;
s->s[i].replicas_reserved = 0;
WARN_ON((u64) page_offset(page) + offset + len >
round_up((u64) i_size_read(&inode->v), block_bytes(c)));
+ spin_lock(&s->lock);
+
for (i = round_down(offset, block_bytes(c)) >> 9;
i < round_up(offset + len, block_bytes(c)) >> 9;
i++) {
unsigned sectors = sectors_to_reserve(&s->s[i],
res->disk.nr_replicas);
- BUG_ON(sectors > res->disk.sectors);
+ /*
+ * This can happen if we race with the error path in
+ * bch2_writepage_io_done():
+ */
+ sectors = min_t(unsigned, sectors, res->disk.sectors);
+
s->s[i].replicas_reserved += sectors;
res->disk.sectors -= sectors;
s->s[i].state = max_t(unsigned, s->s[i].state, SECTOR_DIRTY);
}
+ spin_unlock(&s->lock);
+
if (dirty_sectors)
i_sectors_acct(c, inode, &res->quota, dirty_sectors);
__set_page_dirty_nobuffers(page);
}
+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 = inode->v.i_mapping;
+ struct address_space *mapping = file->f_mapping;
struct bch_fs *c = inode->v.i_sb->s_fs_info;
struct bch2_page_reservation res;
unsigned len;
* a write_invalidate_inode_pages_range() that works without dropping
* page lock before invalidating page
*/
- if (current->pagecache_lock != &mapping->add_lock)
- pagecache_add_get(&mapping->add_lock);
+ bch2_pagecache_add_get(&inode->ei_pagecache_lock);
lock_page(page);
isize = i_size_read(&inode->v);
}
bch2_set_page_dirty(c, inode, page, &res, 0, len);
+ bch2_page_reservation_put(c, inode, &res);
+
wait_for_stable_page(page);
out:
- if (current->pagecache_lock != &mapping->add_lock)
- pagecache_add_put(&mapping->add_lock);
+ bch2_pagecache_add_put(&inode->ei_pagecache_lock);
sb_end_pagefault(inode->v.i_sb);
- bch2_page_reservation_put(c, inode, &res);
-
return ret;
}
void bch2_invalidatepage(struct page *page, unsigned int offset,
unsigned int length)
{
- EBUG_ON(!PageLocked(page));
- EBUG_ON(PageWriteback(page));
-
if (offset || length < PAGE_SIZE)
return;
int bch2_releasepage(struct page *page, gfp_t gfp_mask)
{
- /* XXX: this can't take locks that are held while we allocate memory */
- EBUG_ON(!PageLocked(page));
- EBUG_ON(PageWriteback(page));
-
if (PageDirty(page))
return 0;
EBUG_ON(!PageLocked(page));
EBUG_ON(!PageLocked(newpage));
- ret = migrate_page_move_mapping(mapping, newpage, page, mode, 0);
+ ret = migrate_page_move_mapping(mapping, newpage, page, 0);
if (ret != MIGRATEPAGE_SUCCESS)
return ret;
struct bvec_iter iter;
struct bio_vec bv;
unsigned nr_ptrs = k.k->type == KEY_TYPE_reflink_v
- ? 0 : bch2_bkey_nr_ptrs_allocated(k);
+ ? 0 : bch2_bkey_nr_ptrs_fully_allocated(k);
unsigned state = k.k->type == KEY_TYPE_reservation
? SECTOR_RESERVED
: SECTOR_ALLOCATED;
}
}
+static bool extent_partial_reads_expensive(struct bkey_s_c k)
+{
+ struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k);
+ struct bch_extent_crc_unpacked crc;
+ const union bch_extent_entry *i;
+
+ bkey_for_each_crc(k.k, ptrs, crc, i)
+ if (crc.csum_type || crc.compression_type)
+ return true;
+ return false;
+}
+
static void readpage_bio_extend(struct readpages_iter *iter,
struct bio *bio,
unsigned sectors_this_extent,
struct readpages_iter *readpages_iter)
{
struct bch_fs *c = trans->c;
+ struct bkey_on_stack sk;
int flags = BCH_READ_RETRY_IF_STALE|
BCH_READ_MAY_PROMOTE;
int ret = 0;
rbio->c = c;
rbio->start_time = local_clock();
+
+ bkey_on_stack_init(&sk);
retry:
while (1) {
- BKEY_PADDED(k) tmp;
struct bkey_s_c k;
unsigned bytes, sectors, offset_into_extent;
if (ret)
break;
- bkey_reassemble(&tmp.k, k);
- k = bkey_i_to_s_c(&tmp.k);
+ bkey_on_stack_reassemble(&sk, c, k);
+ k = bkey_i_to_s_c(sk.k);
offset_into_extent = iter->pos.offset -
bkey_start_offset(k.k);
sectors = k.k->size - offset_into_extent;
ret = bch2_read_indirect_extent(trans,
- &offset_into_extent, &tmp.k);
+ &offset_into_extent, &sk);
if (ret)
break;
bch2_trans_unlock(trans);
- if (readpages_iter) {
- bool want_full_extent = false;
-
- if (bkey_extent_is_data(k.k)) {
- struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k);
- const union bch_extent_entry *i;
- struct extent_ptr_decoded p;
-
- bkey_for_each_ptr_decode(k.k, ptrs, p, i)
- want_full_extent |= ((p.crc.csum_type != 0) |
- (p.crc.compression_type != 0));
- }
-
- readpage_bio_extend(readpages_iter, &rbio->bio,
- sectors, want_full_extent);
- }
+ if (readpages_iter)
+ readpage_bio_extend(readpages_iter, &rbio->bio, sectors,
+ extent_partial_reads_expensive(k));
bytes = min(sectors, bio_sectors(&rbio->bio)) << 9;
swap(rbio->bio.bi_iter.bi_size, bytes);
bch2_read_extent(c, rbio, k, offset_into_extent, flags);
if (flags & BCH_READ_LAST_FRAGMENT)
- return;
+ break;
swap(rbio->bio.bi_iter.bi_size, bytes);
bio_advance(&rbio->bio, bytes);
if (ret == -EINTR)
goto retry;
- bcache_io_error(c, &rbio->bio, "btree IO error %i", ret);
- bio_endio(&rbio->bio);
+ if (ret) {
+ bcache_io_error(c, &rbio->bio, "btree IO error %i", ret);
+ bio_endio(&rbio->bio);
+ }
+
+ bkey_on_stack_exit(&sk, c);
}
int bch2_readpages(struct file *file, 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_io_opts opts = io_opts(c, inode);
+ struct bch_io_opts opts = io_opts(c, &inode->ei_inode);
struct btree_trans trans;
struct btree_iter *iter;
struct page *page;
iter = bch2_trans_get_iter(&trans, BTREE_ID_EXTENTS, POS_MIN,
BTREE_ITER_SLOTS);
- if (current->pagecache_lock != &mapping->add_lock)
- pagecache_add_get(&mapping->add_lock);
+ bch2_pagecache_add_get(&inode->ei_pagecache_lock);
while ((page = readpage_iter_next(&readpages_iter))) {
pgoff_t index = readpages_iter.offset + readpages_iter.idx;
&readpages_iter);
}
- if (current->pagecache_lock != &mapping->add_lock)
- pagecache_add_put(&mapping->add_lock);
+ bch2_pagecache_add_put(&inode->ei_pagecache_lock);
bch2_trans_exit(&trans);
kfree(readpages_iter.pages);
{
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);
+ 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);
DECLARE_COMPLETION_ONSTACK(done);
rbio = rbio_init(bio_alloc_bioset(GFP_NOFS, 1, &c->bio_read),
- io_opts(c, inode));
+ io_opts(c, &inode->ei_inode));
rbio->bio.bi_private = &done;
rbio->bio.bi_end_io = bch2_read_single_page_end_io;
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) };
+ return (struct bch_writepage_state) {
+ .opts = io_opts(c, &inode->ei_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);
+ bio_put(&io->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 bch_fs *c = io->op.c;
+ struct bio *bio = &io->op.wbio.bio;
struct bvec_iter_all iter;
struct bio_vec *bvec;
unsigned i;
- if (io->op.op.error) {
+ if (io->op.error) {
bio_for_each_segment_all(bvec, bio, iter) {
struct bch_page_state *s;
SetPageError(bvec->bv_page);
mapping_set_error(bvec->bv_page->mapping, -EIO);
- lock_page(bvec->bv_page);
- s = bch2_page_state(bvec->bv_page);
+ s = __bch2_page_state(bvec->bv_page);
+ spin_lock(&s->lock);
+ for (i = 0; i < PAGE_SECTORS; i++)
+ s->s[i].nr_replicas = 0;
+ spin_unlock(&s->lock);
+ }
+ }
+
+ if (io->op.flags & BCH_WRITE_WROTE_DATA_INLINE) {
+ bio_for_each_segment_all(bvec, bio, iter) {
+ struct bch_page_state *s;
+
+ s = __bch2_page_state(bvec->bv_page);
+ spin_lock(&s->lock);
for (i = 0; i < PAGE_SECTORS; i++)
s->s[i].nr_replicas = 0;
- unlock_page(bvec->bv_page);
+ spin_unlock(&s->lock);
}
}
* 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);
+ BUG_ON(io->op.i_sectors_delta > 0);
/*
* (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);
+ BUG_ON(io->op.op.i_sectors_delta >= 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);
+ i_sectors_acct(c, io->inode, NULL, io->op.i_sectors_delta);
bio_for_each_segment_all(bvec, bio, iter) {
struct bch_page_state *s = __bch2_page_state(bvec->bv_page);
struct bch_writepage_io *io = w->io;
w->io = NULL;
- closure_call(&io->op.op.cl, bch2_write, NULL, &io->cl);
+ closure_call(&io->op.cl, bch2_write, NULL, &io->cl);
continue_at(&io->cl, bch2_writepage_io_done, NULL);
}
* possible, else allocating a new one:
*/
static void bch2_writepage_io_alloc(struct bch_fs *c,
+ struct writeback_control *wbc,
struct bch_writepage_state *w,
struct bch_inode_info *inode,
u64 sector,
w->io = container_of(bio_alloc_bioset(GFP_NOFS,
BIO_MAX_PAGES,
&c->writepage_bioset),
- struct bch_writepage_io, op.op.wbio.bio);
+ struct bch_writepage_io, 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;
+ w->io->inode = inode;
+
+ 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->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);
}
static int __bch2_writepage(struct page *page,
}
if (w->io &&
- (w->io->op.op.res.nr_replicas != nr_replicas_this_write ||
- bio_full(&w->io->op.op.wbio.bio) ||
- bio_end_sector(&w->io->op.op.wbio.bio) != sector))
+ (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_end_sector(&w->io->op.wbio.bio) != sector))
bch2_writepage_do_io(w);
if (!w->io)
- bch2_writepage_io_alloc(c, w, inode, sector,
+ bch2_writepage_io_alloc(c, wbc, w, inode, sector,
nr_replicas_this_write);
- w->io->new_sectors += dirty_sectors;
-
atomic_inc(&s->write_count);
- BUG_ON(inode != w->io->op.inode);
- BUG_ON(!bio_add_page(&w->io->op.op.wbio.bio, page,
+ BUG_ON(inode != w->io->inode);
+ BUG_ON(!bio_add_page(&w->io->op.wbio.bio, page,
sectors << 9, offset << 9));
/* Check for writing past i_size: */
- WARN_ON((bio_end_sector(&w->io->op.op.wbio.bio) << 9) >
+ WARN_ON((bio_end_sector(&w->io->op.wbio.bio) << 9) >
round_up(i_size, block_bytes(c)));
- w->io->op.op.res.sectors += reserved_sectors;
+ w->io->op.res.sectors += reserved_sectors;
+ w->io->op.i_sectors_delta -= dirty_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;
-
offset += sectors;
}
bch2_page_reservation_init(c, inode, res);
*fsdata = res;
- /* Not strictly necessary - same reason as mkwrite(): */
- pagecache_add_get(&mapping->add_lock);
+ bch2_pagecache_add_get(&inode->ei_pagecache_lock);
page = grab_cache_page_write_begin(mapping, index, flags);
if (!page)
put_page(page);
*pagep = NULL;
err_unlock:
- pagecache_add_put(&mapping->add_lock);
+ bch2_pagecache_add_put(&inode->ei_pagecache_lock);
kfree(res);
*fsdata = NULL;
return ret;
unlock_page(page);
put_page(page);
- pagecache_add_put(&mapping->add_lock);
+ bch2_pagecache_add_put(&inode->ei_pagecache_lock);
bch2_page_reservation_put(c, inode, res);
kfree(res);
ssize_t written = 0;
int ret = 0;
- pagecache_add_get(&mapping->add_lock);
+ bch2_pagecache_add_get(&inode->ei_pagecache_lock);
do {
unsigned offset = pos & (PAGE_SIZE - 1);
balance_dirty_pages_ratelimited(mapping);
} while (iov_iter_count(iter));
- pagecache_add_put(&mapping->add_lock);
+ bch2_pagecache_add_put(&inode->ei_pagecache_lock);
return written ? written : ret;
}
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 bch_io_opts opts = io_opts(c, &inode->ei_inode);
struct dio_read *dio;
struct bio *bio;
loff_t offset = req->ki_pos;
}
}
-/* O_DIRECT writes */
+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;
-static void bch2_dio_write_loop_async(struct closure *);
+ 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 */
static long bch2_dio_write_loop(struct dio_write *dio)
{
bool kthread = (current->flags & PF_KTHREAD) != 0;
- struct bch_fs *c = dio->iop.op.c;
+ struct bch_fs *c = dio->op.c;
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 bch_inode_info *inode = file_bch_inode(req->ki_filp);
+ struct bio *bio = &dio->op.wbio.bio;
struct bvec_iter_all iter;
struct bio_vec *bv;
unsigned unaligned;
- loff_t offset;
- bool sync;
+ u64 new_i_size;
+ bool sync = dio->sync;
long ret;
if (dio->loop)
goto loop;
- inode_dio_begin(&inode->v);
- __pagecache_block_get(&mapping->add_lock);
-
- /* Write and invalidate pagecache range that we're writing to: */
- offset = req->ki_pos + (dio->iop.op.written << 9);
- ret = write_invalidate_inode_pages_range(mapping,
- offset,
- offset + iov_iter_count(&dio->iter) - 1);
- if (unlikely(ret))
- goto err;
-
while (1) {
- offset = req->ki_pos + (dio->iop.op.written << 9);
+ size_t extra = dio->iter.count -
+ min(BIO_MAX_PAGES * PAGE_SIZE, dio->iter.count);
- BUG_ON(current->pagecache_lock);
- current->pagecache_lock = &mapping->add_lock;
if (kthread)
use_mm(dio->mm);
+ BUG_ON(current->faults_disabled_mapping);
+ current->faults_disabled_mapping = mapping;
+
+ /*
+ * Don't issue more than 2MB at once, the bcachefs io path in
+ * io.c can't bounce more than that:
+ */
+ dio->iter.count -= extra;
ret = bio_iov_iter_get_pages(bio, &dio->iter);
+ dio->iter.count += extra;
+ current->faults_disabled_mapping = NULL;
if (kthread)
unuse_mm(dio->mm);
- current->pagecache_lock = NULL;
if (unlikely(ret < 0))
goto err;
goto err;
}
- /* gup might have faulted pages back in: */
- ret = write_invalidate_inode_pages_range(mapping,
- offset,
- offset + bio->bi_iter.bi_size - 1);
- if (unlikely(ret))
- goto err;
-
- dio->iop.op.pos = POS(inode->v.i_ino, offset >> 9);
+ dio->op.pos = POS(inode->v.i_ino,
+ (req->ki_pos >> 9) + dio->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) {
struct iovec *iov = dio->inline_vecs;
iov = kmalloc(dio->iter.nr_segs * sizeof(*iov),
GFP_KERNEL);
if (unlikely(!iov)) {
- dio->iop.op.error = -ENOMEM;
- goto err_wait_io;
+ dio->sync = sync = true;
+ goto do_io;
}
dio->free_iov = true;
memcpy(iov, dio->iter.iov, dio->iter.nr_segs * sizeof(*iov));
dio->iter.iov = iov;
}
-err_wait_io:
+do_io:
dio->loop = true;
+ closure_call(&dio->op.cl, bch2_write, NULL, NULL);
- if (!dio->sync) {
- continue_at(&dio->cl, bch2_dio_write_loop_async, NULL);
+ if (sync)
+ wait_for_completion(&dio->done);
+ else
return -EIOCBQUEUED;
- }
-
- closure_sync(&dio->cl);
loop:
+ i_sectors_acct(c, inode, &dio->quota_res,
+ dio->op.i_sectors_delta);
+ dio->op.i_sectors_delta = 0;
+
+ new_i_size = req->ki_pos + ((u64) dio->op.written << 9);
+
+ spin_lock(&inode->v.i_lock);
+ if (new_i_size > inode->v.i_size)
+ i_size_write(&inode->v, new_i_size);
+ spin_unlock(&inode->v.i_lock);
+
bio_for_each_segment_all(bv, bio, iter)
put_page(bv->bv_page);
- if (!dio->iter.count || dio->iop.op.error)
+ if (!dio->iter.count || dio->op.error)
break;
+
bio_reset(bio);
+ reinit_completion(&dio->done);
}
- ret = dio->iop.op.error ?: ((long) dio->iop.op.written << 9);
+ ret = dio->op.error ?: ((long) dio->op.written << 9);
err:
- __pagecache_block_put(&mapping->add_lock);
- bch2_disk_reservation_put(c, &dio->iop.op.res);
+ bch2_pagecache_block_put(&inode->ei_pagecache_lock);
+ bch2_disk_reservation_put(c, &dio->op.res);
bch2_quota_reservation_put(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 */
return ret;
}
-static void bch2_dio_write_loop_async(struct closure *cl)
+static void bch2_dio_write_loop_async(struct bch_write_op *op)
{
- struct dio_write *dio = container_of(cl, struct dio_write, cl);
+ struct dio_write *dio = container_of(op, struct dio_write, op);
- bch2_dio_write_loop(dio);
+ if (dio->sync)
+ complete(&dio->done);
+ else
+ bch2_dio_write_loop(dio);
}
-static int bch2_direct_IO_write(struct kiocb *req,
- struct iov_iter *iter,
- bool swap)
+static noinline
+ssize_t bch2_direct_write(struct kiocb *req, struct iov_iter *iter)
{
struct file *file = req->ki_filp;
+ struct address_space *mapping = file->f_mapping;
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->ei_inode);
struct dio_write *dio;
struct bio *bio;
+ bool locked = true, extending;
ssize_t ret;
- lockdep_assert_held(&inode->v.i_rwsem);
+ prefetch(&c->opts);
+ prefetch((void *) &c->opts + 64);
+ prefetch(&inode->ei_inode);
+ prefetch((void *) &inode->ei_inode + 64);
- if (unlikely(!iter->count))
- return 0;
+ inode_lock(&inode->v);
+
+ ret = generic_write_checks(req, iter);
+ if (unlikely(ret <= 0))
+ goto err;
+
+ ret = file_remove_privs(file);
+ if (unlikely(ret))
+ goto err;
+
+ ret = file_update_time(file);
+ if (unlikely(ret))
+ goto err;
if (unlikely((req->ki_pos|iter->count) & (block_bytes(c) - 1)))
- return -EINVAL;
+ goto err;
+
+ inode_dio_begin(&inode->v);
+ bch2_pagecache_block_get(&inode->ei_pagecache_lock);
+
+ extending = req->ki_pos + iter->count > inode->v.i_size;
+ if (!extending) {
+ inode_unlock(&inode->v);
+ locked = false;
+ }
bio = bio_alloc_bioset(GFP_KERNEL,
iov_iter_npages(iter, BIO_MAX_PAGES),
&c->dio_write_bioset);
- dio = container_of(bio, struct dio_write, iop.op.wbio.bio);
- closure_init(&dio->cl, NULL);
+ dio = container_of(bio, struct dio_write, op.wbio.bio);
+ init_completion(&dio->done);
dio->req = req;
dio->mm = current->mm;
dio->loop = false;
- dio->sync = is_sync_kiocb(req) ||
- req->ki_pos + iter->count > inode->v.i_size;
+ dio->sync = is_sync_kiocb(req) || extending;
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) current);
- dio->iop.op.flags |= BCH_WRITE_NOPUT_RESERVATION;
+
+ bch2_write_op_init(&dio->op, c, opts);
+ dio->op.end_io = bch2_dio_write_loop_async;
+ dio->op.target = opts.foreground_target;
+ op_journal_seq_set(&dio->op, &inode->ei_journal_seq);
+ dio->op.write_point = writepoint_hashed((unsigned long) current);
+ dio->op.flags |= BCH_WRITE_NOPUT_RESERVATION;
if ((req->ki_flags & IOCB_DSYNC) &&
!c->opts.journal_flush_disabled)
- dio->iop.op.flags |= BCH_WRITE_FLUSH;
+ dio->op.flags |= BCH_WRITE_FLUSH;
ret = bch2_quota_reservation_add(c, inode, &dio->quota_res,
iter->count >> 9, true);
if (unlikely(ret))
- goto err;
+ goto err_put_bio;
- dio->iop.op.nr_replicas = dio->iop.op.opts.data_replicas;
+ dio->op.nr_replicas = dio->op.opts.data_replicas;
- 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,
- req->ki_pos >> 9),
- iter->count >> 9,
- dio->iop.op.opts.data_replicas))
- goto err;
+ ret = bch2_disk_reservation_get(c, &dio->op.res, iter->count >> 9,
+ dio->op.opts.data_replicas, 0);
+ if (unlikely(ret) &&
+ !bch2_check_range_allocated(c, POS(inode->v.i_ino,
+ req->ki_pos >> 9),
+ iter->count >> 9,
+ dio->op.opts.data_replicas))
+ goto err_put_bio;
- dio->iop.unalloc = true;
- }
+ ret = write_invalidate_inode_pages_range(mapping,
+ req->ki_pos,
+ req->ki_pos + iter->count - 1);
+ if (unlikely(ret))
+ goto err_put_bio;
- return bch2_dio_write_loop(dio);
+ ret = bch2_dio_write_loop(dio);
err:
- bch2_disk_reservation_put(c, &dio->iop.op.res);
+ if (locked)
+ inode_unlock(&inode->v);
+ if (ret > 0)
+ req->ki_pos += ret;
+ return ret;
+err_put_bio:
+ bch2_pagecache_block_put(&inode->ei_pagecache_lock);
+ bch2_disk_reservation_put(c, &dio->op.res);
bch2_quota_reservation_put(c, inode, &dio->quota_res);
- closure_debug_destroy(&dio->cl);
bio_put(bio);
- return ret;
-}
-
-ssize_t bch2_direct_IO(struct kiocb *req, struct iov_iter *iter)
-{
- struct blk_plug plug;
- ssize_t ret;
-
- blk_start_plug(&plug);
- ret = iov_iter_rw(iter) == WRITE
- ? bch2_direct_IO_write(req, iter, false)
- : bch2_direct_IO_read(req, iter);
- blk_finish_plug(&plug);
-
- return ret;
-}
-
-static ssize_t
-bch2_direct_write(struct kiocb *iocb, struct iov_iter *iter)
-{
- return bch2_direct_IO_write(iocb, iter, true);
+ inode_dio_end(&inode->v);
+ goto err;
}
-static ssize_t __bch2_write_iter(struct kiocb *iocb, struct iov_iter *from)
+ssize_t bch2_write_iter(struct kiocb *iocb, struct iov_iter *from)
{
struct file *file = iocb->ki_filp;
struct bch_inode_info *inode = file_bch_inode(file);
- ssize_t ret;
+ ssize_t ret;
+
+ if (iocb->ki_flags & IOCB_DIRECT)
+ return bch2_direct_write(iocb, from);
/* We can write back this queue in page reclaim */
current->backing_dev_info = inode_to_bdi(&inode->v);
+ inode_lock(&inode->v);
+
+ ret = generic_write_checks(iocb, from);
+ if (ret <= 0)
+ goto unlock;
+
ret = file_remove_privs(file);
if (ret)
- goto out;
+ goto unlock;
ret = file_update_time(file);
if (ret)
- goto out;
-
- ret = iocb->ki_flags & IOCB_DIRECT
- ? bch2_direct_write(iocb, from)
- : bch2_buffered_write(iocb, from);
+ goto unlock;
+ ret = bch2_buffered_write(iocb, from);
if (likely(ret > 0))
iocb->ki_pos += ret;
-out:
+unlock:
+ inode_unlock(&inode->v);
current->backing_dev_info = NULL;
- 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;
/* truncate: */
-int bch2_fpunch_at(struct btree_trans *trans, struct btree_iter *iter,
- struct bpos end, struct bch_inode_info *inode,
- u64 new_i_size)
-{
- struct bch_fs *c = trans->c;
- unsigned max_sectors = KEY_SIZE_MAX & (~0 << c->block_bits);
- struct bkey_s_c k;
- int ret = 0, ret2 = 0;
-
- while ((k = bch2_btree_iter_peek(iter)).k &&
- bkey_cmp(iter->pos, end) < 0) {
- struct disk_reservation disk_res =
- bch2_disk_reservation_init(c, 0);
- struct bkey_i delete;
-
- ret = bkey_err(k);
- if (ret)
- goto btree_err;
-
- 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);
-
- bch2_trans_begin_updates(trans);
-
- ret = bch2_extent_update(trans, inode,
- &disk_res, NULL, iter, &delete,
- new_i_size, false, true, NULL);
- bch2_disk_reservation_put(c, &disk_res);
-btree_err:
- if (ret == -EINTR) {
- ret2 = ret;
- ret = 0;
- }
- if (ret)
- break;
- }
-
- if (bkey_cmp(iter->pos, end) > 0) {
- bch2_btree_iter_set_pos(iter, end);
- ret = bch2_btree_iter_traverse(iter);
- }
-
- return ret ?: ret2;
-}
-
-static int __bch2_fpunch(struct bch_fs *c, struct bch_inode_info *inode,
- u64 start_offset, u64 end_offset)
-{
- struct btree_trans trans;
- struct btree_iter *iter;
- int ret = 0;
-
- bch2_trans_init(&trans, c, BTREE_ITER_MAX, 1024);
-
- iter = bch2_trans_get_iter(&trans, BTREE_ID_EXTENTS,
- POS(inode->v.i_ino, start_offset),
- BTREE_ITER_INTENT);
-
- ret = bch2_fpunch_at(&trans, iter,
- POS(inode->v.i_ino, end_offset),
- inode, 0);
-
- bch2_trans_exit(&trans);
-
- if (ret == -EINTR)
- ret = 0;
-
- return ret;
-}
-
static inline int range_has_data(struct bch_fs *c,
struct bpos start,
struct bpos end)
from, round_up(from, PAGE_SIZE));
}
-static int bch2_extend(struct bch_inode_info *inode, struct iattr *iattr)
+static int bch2_extend(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;
- ret = filemap_write_and_wait_range(mapping,
- inode->ei_inode.bi_size, S64_MAX);
+ /*
+ * sync appends:
+ *
+ * this has to be done _before_ extending i_size:
+ */
+ ret = filemap_write_and_wait_range(mapping, inode_u->bi_size, S64_MAX);
if (ret)
return ret;
{
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;
- bool shrink;
+ s64 i_sectors_delta = 0;
int ret = 0;
inode_dio_wait(&inode->v);
- pagecache_block_get(&mapping->add_lock);
+ bch2_pagecache_block_get(&inode->ei_pagecache_lock);
+
+ /*
+ * fetch current on disk i_size: inode is locked, i_size can only
+ * increase underneath us:
+ */
+ 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 (ret)
+ goto err;
- BUG_ON(inode->v.i_size < inode->ei_inode.bi_size);
+ /*
+ * check this before next assertion; on filesystem error our normal
+ * invariants are a bit broken (truncate has to truncate the page cache
+ * before the inode).
+ */
+ ret = bch2_journal_error(&c->journal);
+ if (ret)
+ goto err;
- shrink = iattr->ia_size <= inode->v.i_size;
+ BUG_ON(inode->v.i_size < inode_u.bi_size);
- if (!shrink) {
- ret = bch2_extend(inode, iattr);
+ if (iattr->ia_size > inode->v.i_size) {
+ ret = bch2_extend(inode, &inode_u, iattr);
goto err;
}
* userspace has to redirty it and call .mkwrite -> set_page_dirty
* again to allocate the part of the page that was extended.
*/
- if (iattr->ia_size > inode->ei_inode.bi_size)
+ if (iattr->ia_size > inode_u.bi_size)
ret = filemap_write_and_wait_range(mapping,
- inode->ei_inode.bi_size,
+ inode_u.bi_size,
iattr->ia_size - 1);
else if (iattr->ia_size & (PAGE_SIZE - 1))
ret = filemap_write_and_wait_range(mapping,
truncate_setsize(&inode->v, iattr->ia_size);
- ret = __bch2_fpunch(c, inode,
+ ret = bch2_fpunch(c, inode->v.i_ino,
round_up(iattr->ia_size, block_bytes(c)) >> 9,
- U64_MAX);
+ U64_MAX, &inode->ei_journal_seq, &i_sectors_delta);
+ i_sectors_acct(c, inode, NULL, i_sectors_delta);
+
if (unlikely(ret))
goto err;
ATTR_MTIME|ATTR_CTIME);
mutex_unlock(&inode->ei_update_lock);
err:
- pagecache_block_put(&mapping->add_lock);
+ 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)
+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;
- struct address_space *mapping = inode->v.i_mapping;
u64 discard_start = round_up(offset, block_bytes(c)) >> 9;
u64 discard_end = round_down(offset + len, block_bytes(c)) >> 9;
int ret = 0;
inode_lock(&inode->v);
inode_dio_wait(&inode->v);
- pagecache_block_get(&mapping->add_lock);
+ bch2_pagecache_block_get(&inode->ei_pagecache_lock);
ret = __bch2_truncate_page(inode,
offset >> PAGE_SHIFT,
truncate_pagecache_range(&inode->v, offset, offset + len - 1);
- if (discard_start < discard_end)
- ret = __bch2_fpunch(c, inode, discard_start, discard_end);
+ if (discard_start < discard_end) {
+ s64 i_sectors_delta = 0;
+
+ ret = bch2_fpunch(c, inode->v.i_ino,
+ discard_start, discard_end,
+ &inode->ei_journal_seq,
+ &i_sectors_delta);
+ i_sectors_acct(c, inode, NULL, i_sectors_delta);
+ }
err:
- pagecache_block_put(&mapping->add_lock);
+ bch2_pagecache_block_put(&inode->ei_pagecache_lock);
inode_unlock(&inode->v);
return ret;
}
-static long bch2_fcollapse_finsert(struct bch_inode_info *inode,
+static long bchfs_fcollapse_finsert(struct bch_inode_info *inode,
loff_t offset, loff_t len,
bool insert)
{
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 btree_trans trans;
- struct btree_iter *src, *dst, *del = NULL;
+ struct btree_iter *src, *dst;
loff_t shift, new_size;
u64 src_start;
int ret;
if ((offset | len) & (block_bytes(c) - 1))
return -EINVAL;
+ bkey_on_stack_init(©);
bch2_trans_init(&trans, c, BTREE_ITER_MAX, 256);
/*
*/
inode_lock(&inode->v);
inode_dio_wait(&inode->v);
- pagecache_block_get(&mapping->add_lock);
+ bch2_pagecache_block_get(&inode->ei_pagecache_lock);
if (insert) {
ret = -EFBIG;
ATTR_MTIME|ATTR_CTIME);
mutex_unlock(&inode->ei_update_lock);
} else {
- ret = __bch2_fpunch(c, inode, offset >> 9,
- (offset + len) >> 9);
+ s64 i_sectors_delta = 0;
+
+ ret = bch2_fpunch(c, inode->v.i_ino,
+ 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;
}
while (1) {
struct disk_reservation disk_res =
bch2_disk_reservation_init(c, 0);
- BKEY_PADDED(k) copy;
struct bkey_i delete;
struct bkey_s_c k;
struct bpos next_pos;
struct bpos move_pos = POS(inode->v.i_ino, offset >> 9);
struct bpos atomic_end;
- unsigned commit_flags = BTREE_INSERT_NOFAIL|
- BTREE_INSERT_ATOMIC|
- BTREE_INSERT_USE_RESERVE;
+ unsigned trigger_flags = 0;
k = insert
? bch2_btree_iter_peek_prev(src)
bkey_cmp(k.k->p, POS(inode->v.i_ino, offset >> 9)) <= 0)
break;
reassemble:
- bkey_reassemble(©.k, k);
+ bkey_on_stack_reassemble(©, c, k);
if (insert &&
- bkey_cmp(bkey_start_pos(k.k), move_pos) < 0) {
- bch2_cut_front(move_pos, ©.k);
- bch2_btree_iter_set_pos(src, bkey_start_pos(©.k.k));
- }
+ 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));
-
- ret = bch2_btree_iter_traverse(dst);
- if (ret)
- goto bkey_err;
+ copy.k->k.p.offset += shift >> 9;
+ bch2_btree_iter_set_pos(dst, bkey_start_pos(©.k->k));
- ret = bch2_extent_atomic_end(dst, ©.k, &atomic_end);
+ ret = bch2_extent_atomic_end(dst, copy.k, &atomic_end);
if (ret)
goto bkey_err;
- if (bkey_cmp(atomic_end, copy.k.k.p)) {
+ if (bkey_cmp(atomic_end, copy.k->k.p)) {
if (insert) {
move_pos = atomic_end;
move_pos.offset -= shift >> 9;
goto reassemble;
} else {
- bch2_cut_back(atomic_end, ©.k.k);
+ bch2_cut_back(atomic_end, copy.k);
}
}
bkey_init(&delete.k);
- delete.k.p = src->pos;
- bch2_key_resize(&delete.k, copy.k.k.size);
+ delete.k.p = copy.k->k.p;
+ delete.k.size = copy.k->k.size;
+ delete.k.p.offset -= shift >> 9;
next_pos = insert ? bkey_start_pos(&delete.k) : delete.k.p;
- /*
- * If the new and old keys overlap (because we're moving an
- * extent that's bigger than the amount we're collapsing by),
- * we need to trim the delete key here so they don't overlap
- * because overlaps on insertions aren't handled before
- * triggers are run, so the overwrite will get double counted
- * by the triggers machinery:
- */
- if (insert &&
- bkey_cmp(bkey_start_pos(©.k.k), delete.k.p) < 0) {
- bch2_cut_back(bkey_start_pos(©.k.k), &delete.k);
- } else if (!insert &&
- bkey_cmp(copy.k.k.p,
- bkey_start_pos(&delete.k)) > 0) {
- bch2_cut_front(copy.k.k.p, &delete);
-
- del = bch2_trans_copy_iter(&trans, src);
- BUG_ON(IS_ERR_OR_NULL(del));
-
- bch2_btree_iter_set_pos(del,
- bkey_start_pos(&delete.k));
- }
-
- bch2_trans_update(&trans, dst, ©.k);
- bch2_trans_update(&trans, del ?: src, &delete);
-
- if (copy.k.k.size == k.k->size) {
+ if (copy.k->k.size == k.k->size) {
/*
* If we're moving the entire extent, we can skip
* running triggers:
*/
- commit_flags |= BTREE_INSERT_NOMARK;
+ trigger_flags |= BTREE_TRIGGER_NORUN;
} else {
/* We might end up splitting compressed extents: */
unsigned nr_ptrs =
- bch2_bkey_nr_dirty_ptrs(bkey_i_to_s_c(©.k));
+ bch2_bkey_nr_ptrs_allocated(bkey_i_to_s_c(copy.k));
ret = bch2_disk_reservation_get(c, &disk_res,
- copy.k.k.size, nr_ptrs,
+ copy.k->k.size, nr_ptrs,
BCH_DISK_RESERVATION_NOFAIL);
BUG_ON(ret);
}
- ret = bch2_trans_commit(&trans, &disk_res,
- &inode->ei_journal_seq,
- commit_flags);
+ 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,
+ BTREE_INSERT_NOFAIL);
bch2_disk_reservation_put(c, &disk_res);
bkey_err:
- if (del)
- bch2_trans_iter_put(&trans, del);
- del = NULL;
-
if (!ret)
bch2_btree_iter_set_pos(src, next_pos);
}
err:
bch2_trans_exit(&trans);
- pagecache_block_put(&mapping->add_lock);
+ bkey_on_stack_exit(©, c);
+ 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)
+static long bchfs_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;
loff_t block_start = round_down(offset, block_bytes(c));
loff_t block_end = round_up(end, block_bytes(c));
unsigned sectors;
- unsigned replicas = io_opts(c, inode).data_replicas;
+ 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);
- pagecache_block_get(&mapping->add_lock);
+ 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);
end_pos = POS(inode->v.i_ino, block_end >> 9);
while (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;
+ bch2_trans_begin(&trans);
+
k = bch2_btree_iter_peek_slot(iter);
if ((ret = bkey_err(k)))
goto bkey_err;
reservation.k.p = k.k->p;
reservation.k.size = k.k->size;
- bch2_cut_front(iter->pos, &reservation.k_i);
- bch2_cut_back(end_pos, &reservation.k);
+ bch2_cut_front(iter->pos, &reservation.k_i);
+ bch2_cut_back(end_pos, &reservation.k_i);
sectors = reservation.k.size;
- reservation.v.nr_replicas = bch2_bkey_nr_dirty_ptrs(k);
+ reservation.v.nr_replicas = bch2_bkey_nr_ptrs_allocated(k);
if (!bkey_extent_is_allocation(k.k)) {
ret = bch2_quota_reservation_add(c, inode,
}
if (reservation.v.nr_replicas < replicas ||
- bch2_extent_is_compressed(k)) {
+ bch2_bkey_sectors_compressed(k)) {
ret = bch2_disk_reservation_get(c, &disk_res, sectors,
replicas, 0);
if (unlikely(ret))
reservation.v.nr_replicas = disk_res.nr_replicas;
}
- bch2_trans_begin_updates(&trans);
-
- ret = bch2_extent_update(&trans, inode,
- &disk_res, "a_res,
- iter, &reservation.k_i,
- 0, true, true, NULL);
+ ret = bch2_extent_update(&trans, iter, &reservation.k_i,
+ &disk_res, &inode->ei_journal_seq,
+ 0, &i_sectors_delta);
+ 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)
goto err;
}
- bch2_trans_unlock(&trans);
- if (!(mode & FALLOC_FL_KEEP_SIZE) &&
- end > inode->v.i_size) {
- i_size_write(&inode->v, end);
+ /*
+ * 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;
- mutex_lock(&inode->ei_update_lock);
- ret = bch2_write_inode_size(c, inode, inode->v.i_size, 0);
- mutex_unlock(&inode->ei_update_lock);
- }
+ 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);
+
+ bch2_trans_unlock(&trans);
+
+ if (ret)
+ goto err;
- /* blech */
- if ((mode & FALLOC_FL_KEEP_SIZE) &&
- (mode & FALLOC_FL_ZERO_RANGE) &&
- inode->ei_inode.bi_size != inode->v.i_size) {
- /* sync appends.. */
+ /*
+ * Sync existing appends before extending i_size,
+ * as in bch2_extend():
+ */
ret = filemap_write_and_wait_range(mapping,
- inode->ei_inode.bi_size, S64_MAX);
+ inode_u.bi_size, S64_MAX);
if (ret)
goto err;
- if (inode->ei_inode.bi_size != inode->v.i_size) {
- mutex_lock(&inode->ei_update_lock);
- ret = bch2_write_inode_size(c, inode,
- inode->v.i_size, 0);
- mutex_unlock(&inode->ei_update_lock);
- }
+ if (mode & FALLOC_FL_KEEP_SIZE)
+ end = inode->v.i_size;
+ else
+ i_size_write(&inode->v, end);
+
+ mutex_lock(&inode->ei_update_lock);
+ ret = bch2_write_inode_size(c, inode, end, 0);
+ mutex_unlock(&inode->ei_update_lock);
}
err:
bch2_trans_exit(&trans);
- pagecache_block_put(&mapping->add_lock);
+ bch2_pagecache_block_put(&inode->ei_pagecache_lock);
inode_unlock(&inode->v);
return ret;
}
loff_t offset, loff_t len)
{
struct bch_inode_info *inode = file_bch_inode(file);
+ struct bch_fs *c = inode->v.i_sb->s_fs_info;
+ long ret;
- 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 (!percpu_ref_tryget(&c->writes))
+ return -EROFS;
- if (mode == FALLOC_FL_INSERT_RANGE)
- return bch2_fcollapse_finsert(inode, offset, len, true);
+ 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_fpunch(inode, offset, len);
+ else if (mode == FALLOC_FL_INSERT_RANGE)
+ ret = bchfs_fcollapse_finsert(inode, offset, len, true);
+ else if (mode == FALLOC_FL_COLLAPSE_RANGE)
+ ret = bchfs_fcollapse_finsert(inode, offset, len, false);
+ else
+ ret = -EOPNOTSUPP;
- if (mode == FALLOC_FL_COLLAPSE_RANGE)
- return bch2_fcollapse_finsert(inode, offset, len, false);
+ percpu_ref_put(&c->writes);
- return -EOPNOTSUPP;
+ return ret;
}
static void mark_range_unallocated(struct bch_inode_info *inode,
lock_page(page);
s = bch2_page_state(page);
- if (s)
+ if (s) {
+ spin_lock(&s->lock);
for (j = 0; j < PAGE_SECTORS; j++)
s->s[j].nr_replicas = 0;
+ spin_unlock(&s->lock);
+ }
unlock_page(page);
}
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;
+ s64 i_sectors_delta = 0;
+ u64 aligned_len;
loff_t ret = 0;
- loff_t aligned_len;
+
+ if (!c->opts.reflink)
+ return -EOPNOTSUPP;
if (remap_flags & ~(REMAP_FILE_DEDUP|REMAP_FILE_ADVISORY))
return -EINVAL;
abs(pos_src - pos_dst) < len)
return -EINVAL;
- bch2_lock_inodes(INODE_LOCK, src, dst);
+ 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);
- __pagecache_block_get(&src->v.i_mapping->add_lock);
- __pagecache_block_get(&dst->v.i_mapping->add_lock);
-
ret = generic_remap_file_range_prep(file_src, pos_src,
file_dst, pos_dst,
&len, remap_flags);
if (ret < 0 || len == 0)
- goto out_unlock;
+ goto err;
- aligned_len = round_up(len, block_bytes(c));
+ aligned_len = round_up((u64) len, block_bytes(c));
ret = write_invalidate_inode_pages_range(dst->v.i_mapping,
- pos_dst, pos_dst + aligned_len);
+ pos_dst, pos_dst + len - 1);
if (ret)
- goto out_unlock;
+ goto err;
mark_range_unallocated(src, pos_src, pos_src + aligned_len);
- ret = bch2_remap_range(c, dst,
+ ret = bch2_remap_range(c,
POS(dst->v.i_ino, pos_dst >> 9),
POS(src->v.i_ino, pos_src >> 9),
aligned_len >> 9,
- pos_dst + len);
- if (ret > 0)
- ret = min(ret << 9, len);
+ &dst->ei_journal_seq,
+ pos_dst + len, &i_sectors_delta);
+ if (ret < 0)
+ goto err;
+
+ /*
+ * due to alignment, we might have remapped slightly more than requsted
+ */
+ ret = min((u64) ret << 9, (u64) len);
-out_unlock:
- __pagecache_block_put(&dst->v.i_mapping->add_lock);
- __pagecache_block_put(&src->v.i_mapping->add_lock);
+ /* XXX get a quota reservation */
+ i_sectors_acct(c, dst, NULL, i_sectors_delta);
- bch2_unlock_inodes(INODE_LOCK, src, dst);
+ 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);
+err:
+ bch2_unlock_inodes(INODE_LOCK|INODE_PAGECACHE_BLOCK, src, dst);
return ret;
}
pr_verbose_init(c->opts, "");
if (bioset_init(&c->writepage_bioset,
- 4, offsetof(struct bch_writepage_io, op.op.wbio.bio),
+ 4, offsetof(struct bch_writepage_io, 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),
+ 4, offsetof(struct dio_write, op.wbio.bio),
BIOSET_NEED_BVECS))
ret = -ENOMEM;
projects / bcachefs-tools-debian / blobdiff