11c6fdbd8SKent Overstreet // SPDX-License-Identifier: GPL-2.0 21c6fdbd8SKent Overstreet #ifndef NO_BCACHEFS_FS 31c6fdbd8SKent Overstreet 41c6fdbd8SKent Overstreet #include "bcachefs.h" 51c6fdbd8SKent Overstreet #include "btree_update.h" 61c6fdbd8SKent Overstreet #include "buckets.h" 71c6fdbd8SKent Overstreet #include "clock.h" 81c6fdbd8SKent Overstreet #include "error.h" 91c6fdbd8SKent Overstreet #include "fs.h" 101c6fdbd8SKent Overstreet #include "fs-io.h" 111c6fdbd8SKent Overstreet #include "fsck.h" 121c6fdbd8SKent Overstreet #include "inode.h" 131c6fdbd8SKent Overstreet #include "journal.h" 141c6fdbd8SKent Overstreet #include "io.h" 151c6fdbd8SKent Overstreet #include "keylist.h" 161c6fdbd8SKent Overstreet #include "quota.h" 171c6fdbd8SKent Overstreet #include "trace.h" 181c6fdbd8SKent Overstreet 191c6fdbd8SKent Overstreet #include <linux/aio.h> 201c6fdbd8SKent Overstreet #include <linux/backing-dev.h> 211c6fdbd8SKent Overstreet #include <linux/falloc.h> 221c6fdbd8SKent Overstreet #include <linux/migrate.h> 231c6fdbd8SKent Overstreet #include <linux/mmu_context.h> 241c6fdbd8SKent Overstreet #include <linux/pagevec.h> 251c6fdbd8SKent Overstreet #include <linux/sched/signal.h> 261c6fdbd8SKent Overstreet #include <linux/task_io_accounting_ops.h> 271c6fdbd8SKent Overstreet #include <linux/uio.h> 281c6fdbd8SKent Overstreet #include <linux/writeback.h> 291c6fdbd8SKent Overstreet 301c6fdbd8SKent Overstreet #include <trace/events/writeback.h> 311c6fdbd8SKent Overstreet 321c6fdbd8SKent Overstreet struct quota_res { 331c6fdbd8SKent Overstreet u64 sectors; 341c6fdbd8SKent Overstreet }; 351c6fdbd8SKent Overstreet 361c6fdbd8SKent Overstreet struct i_sectors_hook { 371c6fdbd8SKent Overstreet struct extent_insert_hook hook; 381c6fdbd8SKent Overstreet struct bch_inode_info *inode; 391c6fdbd8SKent Overstreet struct quota_res quota_res; 401c6fdbd8SKent Overstreet s64 sectors; 411c6fdbd8SKent Overstreet u64 new_i_size; 421c6fdbd8SKent Overstreet unsigned flags; 431c6fdbd8SKent Overstreet unsigned appending:1; 441c6fdbd8SKent Overstreet }; 451c6fdbd8SKent Overstreet 461c6fdbd8SKent Overstreet struct bchfs_write_op { 471c6fdbd8SKent Overstreet struct bch_inode_info *inode; 481c6fdbd8SKent Overstreet s64 sectors_added; 491c6fdbd8SKent Overstreet bool is_dio; 501c6fdbd8SKent Overstreet bool unalloc; 511c6fdbd8SKent Overstreet u64 new_i_size; 521c6fdbd8SKent Overstreet 531c6fdbd8SKent Overstreet /* must be last: */ 541c6fdbd8SKent Overstreet struct bch_write_op op; 551c6fdbd8SKent Overstreet }; 561c6fdbd8SKent Overstreet 571c6fdbd8SKent Overstreet struct bch_writepage_io { 581c6fdbd8SKent Overstreet struct closure cl; 591c6fdbd8SKent Overstreet u64 new_sectors; 601c6fdbd8SKent Overstreet 611c6fdbd8SKent Overstreet /* must be last: */ 621c6fdbd8SKent Overstreet struct bchfs_write_op op; 631c6fdbd8SKent Overstreet }; 641c6fdbd8SKent Overstreet 651c6fdbd8SKent Overstreet struct dio_write { 661c6fdbd8SKent Overstreet struct closure cl; 671c6fdbd8SKent Overstreet struct kiocb *req; 681c6fdbd8SKent Overstreet struct task_struct *task; 691c6fdbd8SKent Overstreet unsigned loop:1, 701c6fdbd8SKent Overstreet sync:1, 711c6fdbd8SKent Overstreet free_iov:1; 721c6fdbd8SKent Overstreet struct quota_res quota_res; 731c6fdbd8SKent Overstreet 741c6fdbd8SKent Overstreet struct iov_iter iter; 751c6fdbd8SKent Overstreet struct iovec inline_vecs[2]; 761c6fdbd8SKent Overstreet 771c6fdbd8SKent Overstreet /* must be last: */ 781c6fdbd8SKent Overstreet struct bchfs_write_op iop; 791c6fdbd8SKent Overstreet }; 801c6fdbd8SKent Overstreet 811c6fdbd8SKent Overstreet struct dio_read { 821c6fdbd8SKent Overstreet struct closure cl; 831c6fdbd8SKent Overstreet struct kiocb *req; 841c6fdbd8SKent Overstreet long ret; 851c6fdbd8SKent Overstreet struct bch_read_bio rbio; 861c6fdbd8SKent Overstreet }; 871c6fdbd8SKent Overstreet 881c6fdbd8SKent Overstreet /* pagecache_block must be held */ 891c6fdbd8SKent Overstreet static int write_invalidate_inode_pages_range(struct address_space *mapping, 901c6fdbd8SKent Overstreet loff_t start, loff_t end) 911c6fdbd8SKent Overstreet { 921c6fdbd8SKent Overstreet int ret; 931c6fdbd8SKent Overstreet 941c6fdbd8SKent Overstreet /* 951c6fdbd8SKent Overstreet * XXX: the way this is currently implemented, we can spin if a process 961c6fdbd8SKent Overstreet * is continually redirtying a specific page 971c6fdbd8SKent Overstreet */ 981c6fdbd8SKent Overstreet do { 991c6fdbd8SKent Overstreet if (!mapping->nrpages) 1001c6fdbd8SKent Overstreet return 0; 1011c6fdbd8SKent Overstreet 1021c6fdbd8SKent Overstreet ret = filemap_write_and_wait_range(mapping, start, end); 1031c6fdbd8SKent Overstreet if (ret) 1041c6fdbd8SKent Overstreet break; 1051c6fdbd8SKent Overstreet 1061c6fdbd8SKent Overstreet if (!mapping->nrpages) 1071c6fdbd8SKent Overstreet return 0; 1081c6fdbd8SKent Overstreet 1091c6fdbd8SKent Overstreet ret = invalidate_inode_pages2_range(mapping, 1101c6fdbd8SKent Overstreet start >> PAGE_SHIFT, 1111c6fdbd8SKent Overstreet end >> PAGE_SHIFT); 1121c6fdbd8SKent Overstreet } while (ret == -EBUSY); 1131c6fdbd8SKent Overstreet 1141c6fdbd8SKent Overstreet return ret; 1151c6fdbd8SKent Overstreet } 1161c6fdbd8SKent Overstreet 1171c6fdbd8SKent Overstreet /* quotas */ 1181c6fdbd8SKent Overstreet 1191c6fdbd8SKent Overstreet #ifdef CONFIG_BCACHEFS_QUOTA 1201c6fdbd8SKent Overstreet 1211c6fdbd8SKent Overstreet static void bch2_quota_reservation_put(struct bch_fs *c, 1221c6fdbd8SKent Overstreet struct bch_inode_info *inode, 1231c6fdbd8SKent Overstreet struct quota_res *res) 1241c6fdbd8SKent Overstreet { 1251c6fdbd8SKent Overstreet if (!res->sectors) 1261c6fdbd8SKent Overstreet return; 1271c6fdbd8SKent Overstreet 1281c6fdbd8SKent Overstreet mutex_lock(&inode->ei_quota_lock); 1291c6fdbd8SKent Overstreet BUG_ON(res->sectors > inode->ei_quota_reserved); 1301c6fdbd8SKent Overstreet 1311c6fdbd8SKent Overstreet bch2_quota_acct(c, inode->ei_qid, Q_SPC, 1321c6fdbd8SKent Overstreet -((s64) res->sectors), BCH_QUOTA_PREALLOC); 1331c6fdbd8SKent Overstreet inode->ei_quota_reserved -= res->sectors; 1341c6fdbd8SKent Overstreet mutex_unlock(&inode->ei_quota_lock); 1351c6fdbd8SKent Overstreet 1361c6fdbd8SKent Overstreet res->sectors = 0; 1371c6fdbd8SKent Overstreet } 1381c6fdbd8SKent Overstreet 1391c6fdbd8SKent Overstreet static int bch2_quota_reservation_add(struct bch_fs *c, 1401c6fdbd8SKent Overstreet struct bch_inode_info *inode, 1411c6fdbd8SKent Overstreet struct quota_res *res, 1421c6fdbd8SKent Overstreet unsigned sectors, 1431c6fdbd8SKent Overstreet bool check_enospc) 1441c6fdbd8SKent Overstreet { 1451c6fdbd8SKent Overstreet int ret; 1461c6fdbd8SKent Overstreet 1471c6fdbd8SKent Overstreet mutex_lock(&inode->ei_quota_lock); 1481c6fdbd8SKent Overstreet ret = bch2_quota_acct(c, inode->ei_qid, Q_SPC, sectors, 1491c6fdbd8SKent Overstreet check_enospc ? BCH_QUOTA_PREALLOC : BCH_QUOTA_NOCHECK); 1501c6fdbd8SKent Overstreet if (likely(!ret)) { 1511c6fdbd8SKent Overstreet inode->ei_quota_reserved += sectors; 1521c6fdbd8SKent Overstreet res->sectors += sectors; 1531c6fdbd8SKent Overstreet } 1541c6fdbd8SKent Overstreet mutex_unlock(&inode->ei_quota_lock); 1551c6fdbd8SKent Overstreet 1561c6fdbd8SKent Overstreet return ret; 1571c6fdbd8SKent Overstreet } 1581c6fdbd8SKent Overstreet 1591c6fdbd8SKent Overstreet #else 1601c6fdbd8SKent Overstreet 1611c6fdbd8SKent Overstreet static void bch2_quota_reservation_put(struct bch_fs *c, 1621c6fdbd8SKent Overstreet struct bch_inode_info *inode, 1631c6fdbd8SKent Overstreet struct quota_res *res) 1641c6fdbd8SKent Overstreet { 1651c6fdbd8SKent Overstreet } 1661c6fdbd8SKent Overstreet 1671c6fdbd8SKent Overstreet static int bch2_quota_reservation_add(struct bch_fs *c, 1681c6fdbd8SKent Overstreet struct bch_inode_info *inode, 1691c6fdbd8SKent Overstreet struct quota_res *res, 1701c6fdbd8SKent Overstreet unsigned sectors, 1711c6fdbd8SKent Overstreet bool check_enospc) 1721c6fdbd8SKent Overstreet { 1731c6fdbd8SKent Overstreet return 0; 1741c6fdbd8SKent Overstreet } 1751c6fdbd8SKent Overstreet 1761c6fdbd8SKent Overstreet #endif 1771c6fdbd8SKent Overstreet 1781c6fdbd8SKent Overstreet /* i_size updates: */ 1791c6fdbd8SKent Overstreet 180*2ea90048SKent Overstreet struct inode_new_size { 181*2ea90048SKent Overstreet loff_t new_size; 182*2ea90048SKent Overstreet u64 now; 183*2ea90048SKent Overstreet unsigned fields; 184*2ea90048SKent Overstreet }; 185*2ea90048SKent Overstreet 1861c6fdbd8SKent Overstreet static int inode_set_size(struct bch_inode_info *inode, 1871c6fdbd8SKent Overstreet struct bch_inode_unpacked *bi, 1881c6fdbd8SKent Overstreet void *p) 1891c6fdbd8SKent Overstreet { 190*2ea90048SKent Overstreet struct inode_new_size *s = p; 1911c6fdbd8SKent Overstreet 192*2ea90048SKent Overstreet bi->bi_size = s->new_size; 193*2ea90048SKent Overstreet if (s->fields & ATTR_ATIME) 194*2ea90048SKent Overstreet bi->bi_atime = s->now; 195*2ea90048SKent Overstreet if (s->fields & ATTR_MTIME) 196*2ea90048SKent Overstreet bi->bi_mtime = s->now; 197*2ea90048SKent Overstreet if (s->fields & ATTR_CTIME) 198*2ea90048SKent Overstreet bi->bi_ctime = s->now; 1991c6fdbd8SKent Overstreet 2001c6fdbd8SKent Overstreet return 0; 2011c6fdbd8SKent Overstreet } 2021c6fdbd8SKent Overstreet 2031c6fdbd8SKent Overstreet static int __must_check bch2_write_inode_size(struct bch_fs *c, 2041c6fdbd8SKent Overstreet struct bch_inode_info *inode, 205*2ea90048SKent Overstreet loff_t new_size, unsigned fields) 2061c6fdbd8SKent Overstreet { 207*2ea90048SKent Overstreet struct inode_new_size s = { 208*2ea90048SKent Overstreet .new_size = new_size, 209*2ea90048SKent Overstreet .now = bch2_current_time(c), 210*2ea90048SKent Overstreet .fields = fields, 211*2ea90048SKent Overstreet }; 212*2ea90048SKent Overstreet 213*2ea90048SKent Overstreet return bch2_write_inode(c, inode, inode_set_size, &s, fields); 2141c6fdbd8SKent Overstreet } 2151c6fdbd8SKent Overstreet 2161c6fdbd8SKent Overstreet static void i_sectors_acct(struct bch_fs *c, struct bch_inode_info *inode, 2171c6fdbd8SKent Overstreet struct quota_res *quota_res, int sectors) 2181c6fdbd8SKent Overstreet { 2191c6fdbd8SKent Overstreet mutex_lock(&inode->ei_quota_lock); 2201c6fdbd8SKent Overstreet #ifdef CONFIG_BCACHEFS_QUOTA 2211c6fdbd8SKent Overstreet if (quota_res && sectors > 0) { 2221c6fdbd8SKent Overstreet BUG_ON(sectors > quota_res->sectors); 2231c6fdbd8SKent Overstreet BUG_ON(sectors > inode->ei_quota_reserved); 2241c6fdbd8SKent Overstreet 2251c6fdbd8SKent Overstreet quota_res->sectors -= sectors; 2261c6fdbd8SKent Overstreet inode->ei_quota_reserved -= sectors; 2271c6fdbd8SKent Overstreet } else { 2281c6fdbd8SKent Overstreet bch2_quota_acct(c, inode->ei_qid, Q_SPC, sectors, BCH_QUOTA_WARN); 2291c6fdbd8SKent Overstreet } 2301c6fdbd8SKent Overstreet #endif 2311c6fdbd8SKent Overstreet inode->v.i_blocks += sectors; 2321c6fdbd8SKent Overstreet mutex_unlock(&inode->ei_quota_lock); 2331c6fdbd8SKent Overstreet } 2341c6fdbd8SKent Overstreet 2351c6fdbd8SKent Overstreet /* i_sectors accounting: */ 2361c6fdbd8SKent Overstreet 2371c6fdbd8SKent Overstreet static enum btree_insert_ret 2381c6fdbd8SKent Overstreet i_sectors_hook_fn(struct extent_insert_hook *hook, 2391c6fdbd8SKent Overstreet struct bpos committed_pos, 2401c6fdbd8SKent Overstreet struct bpos next_pos, 2411c6fdbd8SKent Overstreet struct bkey_s_c k, 2421c6fdbd8SKent Overstreet const struct bkey_i *insert) 2431c6fdbd8SKent Overstreet { 2441c6fdbd8SKent Overstreet struct i_sectors_hook *h = container_of(hook, 2451c6fdbd8SKent Overstreet struct i_sectors_hook, hook); 2461c6fdbd8SKent Overstreet s64 sectors = next_pos.offset - committed_pos.offset; 2471c6fdbd8SKent Overstreet int sign = bkey_extent_is_allocation(&insert->k) - 2481c6fdbd8SKent Overstreet (k.k && bkey_extent_is_allocation(k.k)); 2491c6fdbd8SKent Overstreet 2501c6fdbd8SKent Overstreet EBUG_ON(!(h->inode->ei_inode.bi_flags & BCH_INODE_I_SECTORS_DIRTY)); 2511c6fdbd8SKent Overstreet 2521c6fdbd8SKent Overstreet h->sectors += sectors * sign; 2531c6fdbd8SKent Overstreet 2541c6fdbd8SKent Overstreet return BTREE_INSERT_OK; 2551c6fdbd8SKent Overstreet } 2561c6fdbd8SKent Overstreet 2571c6fdbd8SKent Overstreet static int i_sectors_dirty_finish_fn(struct bch_inode_info *inode, 2581c6fdbd8SKent Overstreet struct bch_inode_unpacked *bi, 2591c6fdbd8SKent Overstreet void *p) 2601c6fdbd8SKent Overstreet { 261*2ea90048SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 2621c6fdbd8SKent Overstreet struct i_sectors_hook *h = p; 2631c6fdbd8SKent Overstreet 2641c6fdbd8SKent Overstreet if (h->new_i_size != U64_MAX && 2651c6fdbd8SKent Overstreet (!h->appending || 2661c6fdbd8SKent Overstreet h->new_i_size > bi->bi_size)) 2671c6fdbd8SKent Overstreet bi->bi_size = h->new_i_size; 2681c6fdbd8SKent Overstreet bi->bi_sectors += h->sectors; 2691c6fdbd8SKent Overstreet bi->bi_flags &= ~h->flags; 270*2ea90048SKent Overstreet bi->bi_mtime = bi->bi_ctime = bch2_current_time(c); 2711c6fdbd8SKent Overstreet return 0; 2721c6fdbd8SKent Overstreet } 2731c6fdbd8SKent Overstreet 2741c6fdbd8SKent Overstreet static int i_sectors_dirty_finish(struct bch_fs *c, struct i_sectors_hook *h) 2751c6fdbd8SKent Overstreet { 2761c6fdbd8SKent Overstreet int ret; 2771c6fdbd8SKent Overstreet 2781c6fdbd8SKent Overstreet mutex_lock(&h->inode->ei_update_lock); 2791c6fdbd8SKent Overstreet i_sectors_acct(c, h->inode, &h->quota_res, h->sectors); 2801c6fdbd8SKent Overstreet 281*2ea90048SKent Overstreet ret = bch2_write_inode(c, h->inode, i_sectors_dirty_finish_fn, h, 0); 2821c6fdbd8SKent Overstreet 2831c6fdbd8SKent Overstreet if (!ret && h->new_i_size != U64_MAX) 2841c6fdbd8SKent Overstreet i_size_write(&h->inode->v, h->new_i_size); 2851c6fdbd8SKent Overstreet mutex_unlock(&h->inode->ei_update_lock); 2861c6fdbd8SKent Overstreet 2871c6fdbd8SKent Overstreet bch2_quota_reservation_put(c, h->inode, &h->quota_res); 2881c6fdbd8SKent Overstreet 2891c6fdbd8SKent Overstreet h->sectors = 0; 2901c6fdbd8SKent Overstreet 2911c6fdbd8SKent Overstreet return ret; 2921c6fdbd8SKent Overstreet } 2931c6fdbd8SKent Overstreet 2941c6fdbd8SKent Overstreet static int i_sectors_dirty_start_fn(struct bch_inode_info *inode, 2951c6fdbd8SKent Overstreet struct bch_inode_unpacked *bi, void *p) 2961c6fdbd8SKent Overstreet { 2971c6fdbd8SKent Overstreet struct i_sectors_hook *h = p; 2981c6fdbd8SKent Overstreet 2991c6fdbd8SKent Overstreet if (h->flags & BCH_INODE_I_SIZE_DIRTY) 3001c6fdbd8SKent Overstreet bi->bi_size = h->new_i_size; 3011c6fdbd8SKent Overstreet 3021c6fdbd8SKent Overstreet bi->bi_flags |= h->flags; 3031c6fdbd8SKent Overstreet return 0; 3041c6fdbd8SKent Overstreet } 3051c6fdbd8SKent Overstreet 3061c6fdbd8SKent Overstreet static int i_sectors_dirty_start(struct bch_fs *c, struct i_sectors_hook *h) 3071c6fdbd8SKent Overstreet { 3081c6fdbd8SKent Overstreet int ret; 3091c6fdbd8SKent Overstreet 3101c6fdbd8SKent Overstreet mutex_lock(&h->inode->ei_update_lock); 311*2ea90048SKent Overstreet ret = bch2_write_inode(c, h->inode, i_sectors_dirty_start_fn, h, 0); 3121c6fdbd8SKent Overstreet mutex_unlock(&h->inode->ei_update_lock); 3131c6fdbd8SKent Overstreet 3141c6fdbd8SKent Overstreet return ret; 3151c6fdbd8SKent Overstreet } 3161c6fdbd8SKent Overstreet 3171c6fdbd8SKent Overstreet static inline struct i_sectors_hook 3181c6fdbd8SKent Overstreet i_sectors_hook_init(struct bch_inode_info *inode, unsigned flags) 3191c6fdbd8SKent Overstreet { 3201c6fdbd8SKent Overstreet return (struct i_sectors_hook) { 3211c6fdbd8SKent Overstreet .hook.fn = i_sectors_hook_fn, 3221c6fdbd8SKent Overstreet .inode = inode, 3231c6fdbd8SKent Overstreet .sectors = 0, 3241c6fdbd8SKent Overstreet .new_i_size = U64_MAX, 3251c6fdbd8SKent Overstreet .flags = flags|BCH_INODE_I_SECTORS_DIRTY, 3261c6fdbd8SKent Overstreet }; 3271c6fdbd8SKent Overstreet } 3281c6fdbd8SKent Overstreet 3291c6fdbd8SKent Overstreet /* normal i_size/i_sectors update machinery: */ 3301c6fdbd8SKent Overstreet 3311c6fdbd8SKent Overstreet struct bchfs_extent_trans_hook { 3321c6fdbd8SKent Overstreet struct bchfs_write_op *op; 3331c6fdbd8SKent Overstreet struct extent_insert_hook hook; 3341c6fdbd8SKent Overstreet 3351c6fdbd8SKent Overstreet struct bch_inode_unpacked inode_u; 3361c6fdbd8SKent Overstreet struct bkey_inode_buf inode_p; 3371c6fdbd8SKent Overstreet 3381c6fdbd8SKent Overstreet bool need_inode_update; 3391c6fdbd8SKent Overstreet }; 3401c6fdbd8SKent Overstreet 3411c6fdbd8SKent Overstreet static enum btree_insert_ret 3421c6fdbd8SKent Overstreet bchfs_extent_update_hook(struct extent_insert_hook *hook, 3431c6fdbd8SKent Overstreet struct bpos committed_pos, 3441c6fdbd8SKent Overstreet struct bpos next_pos, 3451c6fdbd8SKent Overstreet struct bkey_s_c k, 3461c6fdbd8SKent Overstreet const struct bkey_i *insert) 3471c6fdbd8SKent Overstreet { 3481c6fdbd8SKent Overstreet struct bchfs_extent_trans_hook *h = container_of(hook, 3491c6fdbd8SKent Overstreet struct bchfs_extent_trans_hook, hook); 3501c6fdbd8SKent Overstreet struct bch_inode_info *inode = h->op->inode; 3511c6fdbd8SKent Overstreet int sign = bkey_extent_is_allocation(&insert->k) - 3521c6fdbd8SKent Overstreet (k.k && bkey_extent_is_allocation(k.k)); 3531c6fdbd8SKent Overstreet s64 sectors = (s64) (next_pos.offset - committed_pos.offset) * sign; 3541c6fdbd8SKent Overstreet u64 offset = min(next_pos.offset << 9, h->op->new_i_size); 3551c6fdbd8SKent Overstreet bool do_pack = false; 3561c6fdbd8SKent Overstreet 3571c6fdbd8SKent Overstreet if (h->op->unalloc && 3581c6fdbd8SKent Overstreet !bch2_extent_is_fully_allocated(k)) 3591c6fdbd8SKent Overstreet return BTREE_INSERT_ENOSPC; 3601c6fdbd8SKent Overstreet 3611c6fdbd8SKent Overstreet BUG_ON((next_pos.offset << 9) > round_up(offset, PAGE_SIZE)); 3621c6fdbd8SKent Overstreet 3631c6fdbd8SKent Overstreet /* XXX: inode->i_size locking */ 3641c6fdbd8SKent Overstreet if (offset > inode->ei_inode.bi_size) { 3651c6fdbd8SKent Overstreet if (!h->need_inode_update) { 3661c6fdbd8SKent Overstreet h->need_inode_update = true; 3671c6fdbd8SKent Overstreet return BTREE_INSERT_NEED_TRAVERSE; 3681c6fdbd8SKent Overstreet } 3691c6fdbd8SKent Overstreet 3701c6fdbd8SKent Overstreet /* truncate in progress? */ 3711c6fdbd8SKent Overstreet if (h->inode_u.bi_flags & BCH_INODE_I_SIZE_DIRTY) 3721c6fdbd8SKent Overstreet goto no_i_size_update; 3731c6fdbd8SKent Overstreet 3741c6fdbd8SKent Overstreet h->inode_u.bi_size = offset; 3751c6fdbd8SKent Overstreet do_pack = true; 3761c6fdbd8SKent Overstreet 3771c6fdbd8SKent Overstreet spin_lock(&inode->v.i_lock); 3781c6fdbd8SKent Overstreet if (offset > inode->v.i_size) { 3791c6fdbd8SKent Overstreet if (h->op->is_dio) 3801c6fdbd8SKent Overstreet i_size_write(&inode->v, offset); 3811c6fdbd8SKent Overstreet else 3821c6fdbd8SKent Overstreet BUG(); 3831c6fdbd8SKent Overstreet } 3841c6fdbd8SKent Overstreet spin_unlock(&inode->v.i_lock); 3851c6fdbd8SKent Overstreet } 3861c6fdbd8SKent Overstreet no_i_size_update: 3871c6fdbd8SKent Overstreet if (sectors) { 3881c6fdbd8SKent Overstreet if (!h->need_inode_update) { 3891c6fdbd8SKent Overstreet h->need_inode_update = true; 3901c6fdbd8SKent Overstreet return BTREE_INSERT_NEED_TRAVERSE; 3911c6fdbd8SKent Overstreet } 3921c6fdbd8SKent Overstreet 3931c6fdbd8SKent Overstreet h->inode_u.bi_sectors += sectors; 3941c6fdbd8SKent Overstreet do_pack = true; 3951c6fdbd8SKent Overstreet 3961c6fdbd8SKent Overstreet h->op->sectors_added += sectors; 3971c6fdbd8SKent Overstreet } 3981c6fdbd8SKent Overstreet 3991c6fdbd8SKent Overstreet if (do_pack) 4001c6fdbd8SKent Overstreet bch2_inode_pack(&h->inode_p, &h->inode_u); 4011c6fdbd8SKent Overstreet 4021c6fdbd8SKent Overstreet return BTREE_INSERT_OK; 4031c6fdbd8SKent Overstreet } 4041c6fdbd8SKent Overstreet 4051c6fdbd8SKent Overstreet static int bchfs_write_index_update(struct bch_write_op *wop) 4061c6fdbd8SKent Overstreet { 4071c6fdbd8SKent Overstreet struct bchfs_write_op *op = container_of(wop, 4081c6fdbd8SKent Overstreet struct bchfs_write_op, op); 4091c6fdbd8SKent Overstreet struct keylist *keys = &op->op.insert_keys; 410d69f41d6SKent Overstreet struct btree_trans trans; 411d69f41d6SKent Overstreet struct btree_iter *extent_iter, *inode_iter = NULL; 4121c6fdbd8SKent Overstreet struct bchfs_extent_trans_hook hook; 4131c6fdbd8SKent Overstreet struct bkey_i *k = bch2_keylist_front(keys); 4141c6fdbd8SKent Overstreet s64 orig_sectors_added = op->sectors_added; 4151c6fdbd8SKent Overstreet int ret; 4161c6fdbd8SKent Overstreet 4171c6fdbd8SKent Overstreet BUG_ON(k->k.p.inode != op->inode->v.i_ino); 4181c6fdbd8SKent Overstreet 419d69f41d6SKent Overstreet bch2_trans_init(&trans, wop->c); 420d69f41d6SKent Overstreet 421d69f41d6SKent Overstreet extent_iter = bch2_trans_get_iter(&trans, 422d69f41d6SKent Overstreet BTREE_ID_EXTENTS, 4231c6fdbd8SKent Overstreet bkey_start_pos(&bch2_keylist_front(keys)->k), 4241c6fdbd8SKent Overstreet BTREE_ITER_INTENT); 425d69f41d6SKent Overstreet BUG_ON(IS_ERR(extent_iter)); 4261c6fdbd8SKent Overstreet 4271c6fdbd8SKent Overstreet hook.op = op; 4281c6fdbd8SKent Overstreet hook.hook.fn = bchfs_extent_update_hook; 4291c6fdbd8SKent Overstreet hook.need_inode_update = false; 4301c6fdbd8SKent Overstreet 4311c6fdbd8SKent Overstreet do { 4321c6fdbd8SKent Overstreet /* XXX: inode->i_size locking */ 4331c6fdbd8SKent Overstreet k = bch2_keylist_front(keys); 4341c6fdbd8SKent Overstreet if (min(k->k.p.offset << 9, op->new_i_size) > 4351c6fdbd8SKent Overstreet op->inode->ei_inode.bi_size) 4361c6fdbd8SKent Overstreet hook.need_inode_update = true; 4371c6fdbd8SKent Overstreet 4381c6fdbd8SKent Overstreet /* optimization for fewer transaction restarts: */ 439d69f41d6SKent Overstreet ret = bch2_btree_iter_traverse(extent_iter); 4401c6fdbd8SKent Overstreet if (ret) 4411c6fdbd8SKent Overstreet goto err; 4421c6fdbd8SKent Overstreet 4431c6fdbd8SKent Overstreet if (hook.need_inode_update) { 4441c6fdbd8SKent Overstreet struct bkey_s_c inode; 4451c6fdbd8SKent Overstreet 446d69f41d6SKent Overstreet if (!inode_iter) { 447d69f41d6SKent Overstreet inode_iter = bch2_trans_get_iter(&trans, 448d69f41d6SKent Overstreet BTREE_ID_INODES, 449d69f41d6SKent Overstreet POS(extent_iter->pos.inode, 0), 450d69f41d6SKent Overstreet BTREE_ITER_SLOTS|BTREE_ITER_INTENT); 451d69f41d6SKent Overstreet BUG_ON(IS_ERR(inode_iter)); 452d69f41d6SKent Overstreet } 4531c6fdbd8SKent Overstreet 454d69f41d6SKent Overstreet inode = bch2_btree_iter_peek_slot(inode_iter); 4551c6fdbd8SKent Overstreet if ((ret = btree_iter_err(inode))) 4561c6fdbd8SKent Overstreet goto err; 4571c6fdbd8SKent Overstreet 4581c6fdbd8SKent Overstreet if (WARN_ONCE(inode.k->type != BCH_INODE_FS, 4591c6fdbd8SKent Overstreet "inode %llu not found when updating", 460d69f41d6SKent Overstreet extent_iter->pos.inode)) { 4611c6fdbd8SKent Overstreet ret = -ENOENT; 4621c6fdbd8SKent Overstreet break; 4631c6fdbd8SKent Overstreet } 4641c6fdbd8SKent Overstreet 4651c6fdbd8SKent Overstreet if (WARN_ONCE(bkey_bytes(inode.k) > 4661c6fdbd8SKent Overstreet sizeof(hook.inode_p), 4671c6fdbd8SKent Overstreet "inode %llu too big (%zu bytes, buf %zu)", 468d69f41d6SKent Overstreet extent_iter->pos.inode, 4691c6fdbd8SKent Overstreet bkey_bytes(inode.k), 4701c6fdbd8SKent Overstreet sizeof(hook.inode_p))) { 4711c6fdbd8SKent Overstreet ret = -ENOENT; 4721c6fdbd8SKent Overstreet break; 4731c6fdbd8SKent Overstreet } 4741c6fdbd8SKent Overstreet 4751c6fdbd8SKent Overstreet bkey_reassemble(&hook.inode_p.inode.k_i, inode); 4761c6fdbd8SKent Overstreet ret = bch2_inode_unpack(bkey_s_c_to_inode(inode), 4771c6fdbd8SKent Overstreet &hook.inode_u); 4781c6fdbd8SKent Overstreet if (WARN_ONCE(ret, 4791c6fdbd8SKent Overstreet "error %i unpacking inode %llu", 480d69f41d6SKent Overstreet ret, extent_iter->pos.inode)) { 4811c6fdbd8SKent Overstreet ret = -ENOENT; 4821c6fdbd8SKent Overstreet break; 4831c6fdbd8SKent Overstreet } 4841c6fdbd8SKent Overstreet 4851c6fdbd8SKent Overstreet ret = bch2_btree_insert_at(wop->c, &wop->res, 4861c6fdbd8SKent Overstreet &hook.hook, op_journal_seq(wop), 4871c6fdbd8SKent Overstreet BTREE_INSERT_NOFAIL| 4881c6fdbd8SKent Overstreet BTREE_INSERT_ATOMIC| 4891c6fdbd8SKent Overstreet BTREE_INSERT_USE_RESERVE, 490d69f41d6SKent Overstreet BTREE_INSERT_ENTRY(extent_iter, k), 491d69f41d6SKent Overstreet BTREE_INSERT_ENTRY_EXTRA_RES(inode_iter, 4921c6fdbd8SKent Overstreet &hook.inode_p.inode.k_i, 2)); 4931c6fdbd8SKent Overstreet } else { 4941c6fdbd8SKent Overstreet ret = bch2_btree_insert_at(wop->c, &wop->res, 4951c6fdbd8SKent Overstreet &hook.hook, op_journal_seq(wop), 4961c6fdbd8SKent Overstreet BTREE_INSERT_NOFAIL| 4971c6fdbd8SKent Overstreet BTREE_INSERT_ATOMIC| 4984e1ec2ccSKent Overstreet BTREE_INSERT_NOUNLOCK| 4991c6fdbd8SKent Overstreet BTREE_INSERT_USE_RESERVE, 500d69f41d6SKent Overstreet BTREE_INSERT_ENTRY(extent_iter, k)); 5011c6fdbd8SKent Overstreet } 5021c6fdbd8SKent Overstreet 503d69f41d6SKent Overstreet BUG_ON(bkey_cmp(extent_iter->pos, bkey_start_pos(&k->k))); 5041c6fdbd8SKent Overstreet 5051c6fdbd8SKent Overstreet if (WARN_ONCE(!ret != !k->k.size, 5061c6fdbd8SKent Overstreet "ret %i k->size %u", ret, k->k.size)) 5071c6fdbd8SKent Overstreet ret = k->k.size ? -EINTR : 0; 5081c6fdbd8SKent Overstreet err: 5091c6fdbd8SKent Overstreet if (ret == -EINTR) 5101c6fdbd8SKent Overstreet continue; 5111c6fdbd8SKent Overstreet if (ret) 5121c6fdbd8SKent Overstreet break; 5131c6fdbd8SKent Overstreet 5144e1ec2ccSKent Overstreet if (hook.need_inode_update) 5154e1ec2ccSKent Overstreet op->inode->ei_inode = hook.inode_u; 5164e1ec2ccSKent Overstreet 517d69f41d6SKent Overstreet BUG_ON(bkey_cmp(extent_iter->pos, k->k.p) < 0); 5181c6fdbd8SKent Overstreet bch2_keylist_pop_front(keys); 5191c6fdbd8SKent Overstreet } while (!bch2_keylist_empty(keys)); 5201c6fdbd8SKent Overstreet 521d69f41d6SKent Overstreet bch2_trans_exit(&trans); 5221c6fdbd8SKent Overstreet 5231c6fdbd8SKent Overstreet if (op->is_dio) { 5241c6fdbd8SKent Overstreet struct dio_write *dio = container_of(op, struct dio_write, iop); 5251c6fdbd8SKent Overstreet 5261c6fdbd8SKent Overstreet i_sectors_acct(wop->c, op->inode, &dio->quota_res, 5271c6fdbd8SKent Overstreet op->sectors_added - orig_sectors_added); 5281c6fdbd8SKent Overstreet } 5291c6fdbd8SKent Overstreet 5301c6fdbd8SKent Overstreet return ret; 5311c6fdbd8SKent Overstreet } 5321c6fdbd8SKent Overstreet 5331c6fdbd8SKent Overstreet static inline void bch2_fswrite_op_init(struct bchfs_write_op *op, 5341c6fdbd8SKent Overstreet struct bch_fs *c, 5351c6fdbd8SKent Overstreet struct bch_inode_info *inode, 5361c6fdbd8SKent Overstreet struct bch_io_opts opts, 5371c6fdbd8SKent Overstreet bool is_dio) 5381c6fdbd8SKent Overstreet { 5391c6fdbd8SKent Overstreet op->inode = inode; 5401c6fdbd8SKent Overstreet op->sectors_added = 0; 5411c6fdbd8SKent Overstreet op->is_dio = is_dio; 5421c6fdbd8SKent Overstreet op->unalloc = false; 5431c6fdbd8SKent Overstreet op->new_i_size = U64_MAX; 5441c6fdbd8SKent Overstreet 5451c6fdbd8SKent Overstreet bch2_write_op_init(&op->op, c, opts); 5461c6fdbd8SKent Overstreet op->op.target = opts.foreground_target; 5471c6fdbd8SKent Overstreet op->op.index_update_fn = bchfs_write_index_update; 5481c6fdbd8SKent Overstreet op_journal_seq_set(&op->op, &inode->ei_journal_seq); 5491c6fdbd8SKent Overstreet } 5501c6fdbd8SKent Overstreet 5511c6fdbd8SKent Overstreet static inline struct bch_io_opts io_opts(struct bch_fs *c, struct bch_inode_info *inode) 5521c6fdbd8SKent Overstreet { 5531c6fdbd8SKent Overstreet struct bch_io_opts opts = bch2_opts_to_inode_opts(c->opts); 5541c6fdbd8SKent Overstreet 5551c6fdbd8SKent Overstreet bch2_io_opts_apply(&opts, bch2_inode_opts_get(&inode->ei_inode)); 5561c6fdbd8SKent Overstreet return opts; 5571c6fdbd8SKent Overstreet } 5581c6fdbd8SKent Overstreet 5591c6fdbd8SKent Overstreet /* page state: */ 5601c6fdbd8SKent Overstreet 5611c6fdbd8SKent Overstreet /* stored in page->private: */ 5621c6fdbd8SKent Overstreet 5631c6fdbd8SKent Overstreet /* 5641c6fdbd8SKent Overstreet * bch_page_state has to (unfortunately) be manipulated with cmpxchg - we could 5651c6fdbd8SKent Overstreet * almost protected it with the page lock, except that bch2_writepage_io_done has 5661c6fdbd8SKent Overstreet * to update the sector counts (and from interrupt/bottom half context). 5671c6fdbd8SKent Overstreet */ 5681c6fdbd8SKent Overstreet struct bch_page_state { 5691c6fdbd8SKent Overstreet union { struct { 5701c6fdbd8SKent Overstreet /* existing data: */ 5711c6fdbd8SKent Overstreet unsigned sectors:PAGE_SECTOR_SHIFT + 1; 5721c6fdbd8SKent Overstreet unsigned nr_replicas:4; 5731c6fdbd8SKent Overstreet unsigned compressed:1; 5741c6fdbd8SKent Overstreet 5751c6fdbd8SKent Overstreet /* Owns PAGE_SECTORS sized reservation: */ 5761c6fdbd8SKent Overstreet unsigned reserved:1; 5771c6fdbd8SKent Overstreet unsigned reservation_replicas:4; 5781c6fdbd8SKent Overstreet 5791c6fdbd8SKent Overstreet /* Owns PAGE_SECTORS sized quota reservation: */ 5801c6fdbd8SKent Overstreet unsigned quota_reserved:1; 5811c6fdbd8SKent Overstreet 5821c6fdbd8SKent Overstreet /* 5831c6fdbd8SKent Overstreet * Number of sectors on disk - for i_blocks 5841c6fdbd8SKent Overstreet * Uncompressed size, not compressed size: 5851c6fdbd8SKent Overstreet */ 5861c6fdbd8SKent Overstreet unsigned dirty_sectors:PAGE_SECTOR_SHIFT + 1; 5871c6fdbd8SKent Overstreet }; 5881c6fdbd8SKent Overstreet /* for cmpxchg: */ 5891c6fdbd8SKent Overstreet unsigned long v; 5901c6fdbd8SKent Overstreet }; 5911c6fdbd8SKent Overstreet }; 5921c6fdbd8SKent Overstreet 5931c6fdbd8SKent Overstreet #define page_state_cmpxchg(_ptr, _new, _expr) \ 5941c6fdbd8SKent Overstreet ({ \ 5951c6fdbd8SKent Overstreet unsigned long _v = READ_ONCE((_ptr)->v); \ 5961c6fdbd8SKent Overstreet struct bch_page_state _old; \ 5971c6fdbd8SKent Overstreet \ 5981c6fdbd8SKent Overstreet do { \ 5991c6fdbd8SKent Overstreet _old.v = _new.v = _v; \ 6001c6fdbd8SKent Overstreet _expr; \ 6011c6fdbd8SKent Overstreet \ 6021c6fdbd8SKent Overstreet EBUG_ON(_new.sectors + _new.dirty_sectors > PAGE_SECTORS);\ 6031c6fdbd8SKent Overstreet } while (_old.v != _new.v && \ 6041c6fdbd8SKent Overstreet (_v = cmpxchg(&(_ptr)->v, _old.v, _new.v)) != _old.v); \ 6051c6fdbd8SKent Overstreet \ 6061c6fdbd8SKent Overstreet _old; \ 6071c6fdbd8SKent Overstreet }) 6081c6fdbd8SKent Overstreet 6091c6fdbd8SKent Overstreet static inline struct bch_page_state *page_state(struct page *page) 6101c6fdbd8SKent Overstreet { 6111c6fdbd8SKent Overstreet struct bch_page_state *s = (void *) &page->private; 6121c6fdbd8SKent Overstreet 6131c6fdbd8SKent Overstreet BUILD_BUG_ON(sizeof(*s) > sizeof(page->private)); 6141c6fdbd8SKent Overstreet 6151c6fdbd8SKent Overstreet if (!PagePrivate(page)) 6161c6fdbd8SKent Overstreet SetPagePrivate(page); 6171c6fdbd8SKent Overstreet 6181c6fdbd8SKent Overstreet return s; 6191c6fdbd8SKent Overstreet } 6201c6fdbd8SKent Overstreet 6211c6fdbd8SKent Overstreet static inline unsigned page_res_sectors(struct bch_page_state s) 6221c6fdbd8SKent Overstreet { 6231c6fdbd8SKent Overstreet 6241c6fdbd8SKent Overstreet return s.reserved ? s.reservation_replicas * PAGE_SECTORS : 0; 6251c6fdbd8SKent Overstreet } 6261c6fdbd8SKent Overstreet 6271c6fdbd8SKent Overstreet static void __bch2_put_page_reservation(struct bch_fs *c, struct bch_inode_info *inode, 6281c6fdbd8SKent Overstreet struct bch_page_state s) 6291c6fdbd8SKent Overstreet { 6301c6fdbd8SKent Overstreet struct disk_reservation res = { .sectors = page_res_sectors(s) }; 6311c6fdbd8SKent Overstreet struct quota_res quota_res = { .sectors = s.quota_reserved ? PAGE_SECTORS : 0 }; 6321c6fdbd8SKent Overstreet 6331c6fdbd8SKent Overstreet bch2_quota_reservation_put(c, inode, "a_res); 6341c6fdbd8SKent Overstreet bch2_disk_reservation_put(c, &res); 6351c6fdbd8SKent Overstreet } 6361c6fdbd8SKent Overstreet 6371c6fdbd8SKent Overstreet static void bch2_put_page_reservation(struct bch_fs *c, struct bch_inode_info *inode, 6381c6fdbd8SKent Overstreet struct page *page) 6391c6fdbd8SKent Overstreet { 6401c6fdbd8SKent Overstreet struct bch_page_state s; 6411c6fdbd8SKent Overstreet 6421c6fdbd8SKent Overstreet s = page_state_cmpxchg(page_state(page), s, { 6431c6fdbd8SKent Overstreet s.reserved = 0; 6441c6fdbd8SKent Overstreet s.quota_reserved = 0; 6451c6fdbd8SKent Overstreet }); 6461c6fdbd8SKent Overstreet 6471c6fdbd8SKent Overstreet __bch2_put_page_reservation(c, inode, s); 6481c6fdbd8SKent Overstreet } 6491c6fdbd8SKent Overstreet 6501c6fdbd8SKent Overstreet static int bch2_get_page_reservation(struct bch_fs *c, struct bch_inode_info *inode, 6511c6fdbd8SKent Overstreet struct page *page, bool check_enospc) 6521c6fdbd8SKent Overstreet { 6531c6fdbd8SKent Overstreet struct bch_page_state *s = page_state(page), new, old; 6541c6fdbd8SKent Overstreet 6551c6fdbd8SKent Overstreet /* XXX: this should not be open coded */ 6561c6fdbd8SKent Overstreet unsigned nr_replicas = inode->ei_inode.bi_data_replicas 6571c6fdbd8SKent Overstreet ? inode->ei_inode.bi_data_replicas - 1 6581c6fdbd8SKent Overstreet : c->opts.data_replicas; 6591c6fdbd8SKent Overstreet 6601c6fdbd8SKent Overstreet struct disk_reservation disk_res = bch2_disk_reservation_init(c, 6611c6fdbd8SKent Overstreet nr_replicas); 6621c6fdbd8SKent Overstreet struct quota_res quota_res = { 0 }; 6631c6fdbd8SKent Overstreet int ret = 0; 6641c6fdbd8SKent Overstreet 6651c6fdbd8SKent Overstreet /* 6661c6fdbd8SKent Overstreet * XXX: this could likely be quite a bit simpler, page reservations 6671c6fdbd8SKent Overstreet * _should_ only be manipulated with page locked: 6681c6fdbd8SKent Overstreet */ 6691c6fdbd8SKent Overstreet 6701c6fdbd8SKent Overstreet old = page_state_cmpxchg(s, new, { 6711c6fdbd8SKent Overstreet if (new.reserved 6721c6fdbd8SKent Overstreet ? (new.reservation_replicas < disk_res.nr_replicas) 6731c6fdbd8SKent Overstreet : (new.sectors < PAGE_SECTORS || 6741c6fdbd8SKent Overstreet new.nr_replicas < disk_res.nr_replicas || 6751c6fdbd8SKent Overstreet new.compressed)) { 6761c6fdbd8SKent Overstreet int sectors = (disk_res.nr_replicas * PAGE_SECTORS - 6771c6fdbd8SKent Overstreet page_res_sectors(new) - 6781c6fdbd8SKent Overstreet disk_res.sectors); 6791c6fdbd8SKent Overstreet 6801c6fdbd8SKent Overstreet if (sectors > 0) { 6811c6fdbd8SKent Overstreet ret = bch2_disk_reservation_add(c, &disk_res, sectors, 6821c6fdbd8SKent Overstreet !check_enospc 6831c6fdbd8SKent Overstreet ? BCH_DISK_RESERVATION_NOFAIL : 0); 6841c6fdbd8SKent Overstreet if (unlikely(ret)) 6851c6fdbd8SKent Overstreet goto err; 6861c6fdbd8SKent Overstreet } 6871c6fdbd8SKent Overstreet 6881c6fdbd8SKent Overstreet new.reserved = 1; 6891c6fdbd8SKent Overstreet new.reservation_replicas = disk_res.nr_replicas; 6901c6fdbd8SKent Overstreet } 6911c6fdbd8SKent Overstreet 6921c6fdbd8SKent Overstreet if (!new.quota_reserved && 6931c6fdbd8SKent Overstreet new.sectors + new.dirty_sectors < PAGE_SECTORS) { 6941c6fdbd8SKent Overstreet ret = bch2_quota_reservation_add(c, inode, "a_res, 6951c6fdbd8SKent Overstreet PAGE_SECTORS - quota_res.sectors, 6961c6fdbd8SKent Overstreet check_enospc); 6971c6fdbd8SKent Overstreet if (unlikely(ret)) 6981c6fdbd8SKent Overstreet goto err; 6991c6fdbd8SKent Overstreet 7001c6fdbd8SKent Overstreet new.quota_reserved = 1; 7011c6fdbd8SKent Overstreet } 7021c6fdbd8SKent Overstreet }); 7031c6fdbd8SKent Overstreet 7041c6fdbd8SKent Overstreet quota_res.sectors -= (new.quota_reserved - old.quota_reserved) * PAGE_SECTORS; 7051c6fdbd8SKent Overstreet disk_res.sectors -= page_res_sectors(new) - page_res_sectors(old); 7061c6fdbd8SKent Overstreet err: 7071c6fdbd8SKent Overstreet bch2_quota_reservation_put(c, inode, "a_res); 7081c6fdbd8SKent Overstreet bch2_disk_reservation_put(c, &disk_res); 7091c6fdbd8SKent Overstreet return ret; 7101c6fdbd8SKent Overstreet } 7111c6fdbd8SKent Overstreet 7121c6fdbd8SKent Overstreet static void bch2_clear_page_bits(struct page *page) 7131c6fdbd8SKent Overstreet { 7141c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(page->mapping->host); 7151c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 7161c6fdbd8SKent Overstreet struct bch_page_state s; 7171c6fdbd8SKent Overstreet 7181c6fdbd8SKent Overstreet if (!PagePrivate(page)) 7191c6fdbd8SKent Overstreet return; 7201c6fdbd8SKent Overstreet 7211c6fdbd8SKent Overstreet s.v = xchg(&page_state(page)->v, 0); 7221c6fdbd8SKent Overstreet ClearPagePrivate(page); 7231c6fdbd8SKent Overstreet 7241c6fdbd8SKent Overstreet if (s.dirty_sectors) 7251c6fdbd8SKent Overstreet i_sectors_acct(c, inode, NULL, -s.dirty_sectors); 7261c6fdbd8SKent Overstreet 7271c6fdbd8SKent Overstreet __bch2_put_page_reservation(c, inode, s); 7281c6fdbd8SKent Overstreet } 7291c6fdbd8SKent Overstreet 7301c6fdbd8SKent Overstreet bool bch2_dirty_folio(struct address_space *mapping, struct folio *folio) 7311c6fdbd8SKent Overstreet { 7321c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(mapping->host); 7331c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 7341c6fdbd8SKent Overstreet struct quota_res quota_res = { 0 }; 7351c6fdbd8SKent Overstreet struct bch_page_state old, new; 7361c6fdbd8SKent Overstreet 7371c6fdbd8SKent Overstreet old = page_state_cmpxchg(page_state(&folio->page), new, 7381c6fdbd8SKent Overstreet new.dirty_sectors = PAGE_SECTORS - new.sectors; 7391c6fdbd8SKent Overstreet new.quota_reserved = 0; 7401c6fdbd8SKent Overstreet ); 7411c6fdbd8SKent Overstreet 7421c6fdbd8SKent Overstreet quota_res.sectors += old.quota_reserved * PAGE_SECTORS; 7431c6fdbd8SKent Overstreet 7441c6fdbd8SKent Overstreet if (old.dirty_sectors != new.dirty_sectors) 7451c6fdbd8SKent Overstreet i_sectors_acct(c, inode, "a_res, 7461c6fdbd8SKent Overstreet new.dirty_sectors - old.dirty_sectors); 7471c6fdbd8SKent Overstreet bch2_quota_reservation_put(c, inode, "a_res); 7481c6fdbd8SKent Overstreet 7491c6fdbd8SKent Overstreet return filemap_dirty_folio(mapping, folio); 7501c6fdbd8SKent Overstreet } 7511c6fdbd8SKent Overstreet 7521c6fdbd8SKent Overstreet vm_fault_t bch2_page_fault(struct vm_fault *vmf) 7531c6fdbd8SKent Overstreet { 7541c6fdbd8SKent Overstreet struct file *file = vmf->vma->vm_file; 7551c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 7561c6fdbd8SKent Overstreet int ret; 7571c6fdbd8SKent Overstreet 7581c6fdbd8SKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 7591c6fdbd8SKent Overstreet ret = filemap_fault(vmf); 7601c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 7611c6fdbd8SKent Overstreet 7621c6fdbd8SKent Overstreet return ret; 7631c6fdbd8SKent Overstreet } 7641c6fdbd8SKent Overstreet 7651c6fdbd8SKent Overstreet vm_fault_t bch2_page_mkwrite(struct vm_fault *vmf) 7661c6fdbd8SKent Overstreet { 7671c6fdbd8SKent Overstreet struct page *page = vmf->page; 7681c6fdbd8SKent Overstreet struct file *file = vmf->vma->vm_file; 7691c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 7701c6fdbd8SKent Overstreet struct address_space *mapping = file->f_mapping; 7711c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 7721c6fdbd8SKent Overstreet int ret = VM_FAULT_LOCKED; 7731c6fdbd8SKent Overstreet 7741c6fdbd8SKent Overstreet sb_start_pagefault(inode->v.i_sb); 7751c6fdbd8SKent Overstreet file_update_time(file); 7761c6fdbd8SKent Overstreet 7771c6fdbd8SKent Overstreet /* 7781c6fdbd8SKent Overstreet * Not strictly necessary, but helps avoid dio writes livelocking in 7791c6fdbd8SKent Overstreet * write_invalidate_inode_pages_range() - can drop this if/when we get 7801c6fdbd8SKent Overstreet * a write_invalidate_inode_pages_range() that works without dropping 7811c6fdbd8SKent Overstreet * page lock before invalidating page 7821c6fdbd8SKent Overstreet */ 7831c6fdbd8SKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 7841c6fdbd8SKent Overstreet 7851c6fdbd8SKent Overstreet lock_page(page); 7861c6fdbd8SKent Overstreet if (page->mapping != mapping || 7871c6fdbd8SKent Overstreet page_offset(page) > i_size_read(&inode->v)) { 7881c6fdbd8SKent Overstreet unlock_page(page); 7891c6fdbd8SKent Overstreet ret = VM_FAULT_NOPAGE; 7901c6fdbd8SKent Overstreet goto out; 7911c6fdbd8SKent Overstreet } 7921c6fdbd8SKent Overstreet 7931c6fdbd8SKent Overstreet if (bch2_get_page_reservation(c, inode, page, true)) { 7941c6fdbd8SKent Overstreet unlock_page(page); 7951c6fdbd8SKent Overstreet ret = VM_FAULT_SIGBUS; 7961c6fdbd8SKent Overstreet goto out; 7971c6fdbd8SKent Overstreet } 7981c6fdbd8SKent Overstreet 7991c6fdbd8SKent Overstreet if (!PageDirty(page)) 8001c6fdbd8SKent Overstreet set_page_dirty(page); 8011c6fdbd8SKent Overstreet wait_for_stable_page(page); 8021c6fdbd8SKent Overstreet out: 8031c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 8041c6fdbd8SKent Overstreet sb_end_pagefault(inode->v.i_sb); 8051c6fdbd8SKent Overstreet return ret; 8061c6fdbd8SKent Overstreet } 8071c6fdbd8SKent Overstreet 8081c6fdbd8SKent Overstreet void bch2_invalidate_folio(struct folio *folio, size_t offset, size_t length) 8091c6fdbd8SKent Overstreet { 8101c6fdbd8SKent Overstreet EBUG_ON(!PageLocked(&folio->page)); 8111c6fdbd8SKent Overstreet EBUG_ON(folio_test_writeback(folio)); 8121c6fdbd8SKent Overstreet 8131c6fdbd8SKent Overstreet if (offset || length < folio_size(folio)) 8141c6fdbd8SKent Overstreet return; 8151c6fdbd8SKent Overstreet 8161c6fdbd8SKent Overstreet bch2_clear_page_bits(&folio->page); 8171c6fdbd8SKent Overstreet } 8181c6fdbd8SKent Overstreet 8191c6fdbd8SKent Overstreet bool bch2_release_folio(struct folio *folio, gfp_t gfp_mask) 8201c6fdbd8SKent Overstreet { 8211c6fdbd8SKent Overstreet /* XXX: this can't take locks that are held while we allocate memory */ 8221c6fdbd8SKent Overstreet EBUG_ON(!PageLocked(&folio->page)); 8231c6fdbd8SKent Overstreet EBUG_ON(folio_test_writeback(folio)); 8241c6fdbd8SKent Overstreet 8251c6fdbd8SKent Overstreet if (folio_test_dirty(folio)) 8261c6fdbd8SKent Overstreet return false; 8271c6fdbd8SKent Overstreet 8281c6fdbd8SKent Overstreet bch2_clear_page_bits(&folio->page); 8291c6fdbd8SKent Overstreet return true; 8301c6fdbd8SKent Overstreet } 8311c6fdbd8SKent Overstreet 8321c6fdbd8SKent Overstreet /* readpages/writepages: */ 8331c6fdbd8SKent Overstreet 8341c6fdbd8SKent Overstreet static bool bio_can_add_page_contig(struct bio *bio, struct page *page) 8351c6fdbd8SKent Overstreet { 8361c6fdbd8SKent Overstreet sector_t offset = (sector_t) page->index << PAGE_SECTOR_SHIFT; 8371c6fdbd8SKent Overstreet 8381c6fdbd8SKent Overstreet return bio->bi_vcnt < bio->bi_max_vecs && 8391c6fdbd8SKent Overstreet bio_end_sector(bio) == offset; 8401c6fdbd8SKent Overstreet } 8411c6fdbd8SKent Overstreet 8421c6fdbd8SKent Overstreet static int bio_add_page_contig(struct bio *bio, struct page *page) 8431c6fdbd8SKent Overstreet { 8441c6fdbd8SKent Overstreet sector_t offset = (sector_t) page->index << PAGE_SECTOR_SHIFT; 8451c6fdbd8SKent Overstreet 8461c6fdbd8SKent Overstreet EBUG_ON(!bio->bi_max_vecs); 8471c6fdbd8SKent Overstreet 8481c6fdbd8SKent Overstreet if (!bio->bi_vcnt) 8491c6fdbd8SKent Overstreet bio->bi_iter.bi_sector = offset; 8501c6fdbd8SKent Overstreet else if (!bio_can_add_page_contig(bio, page)) 8511c6fdbd8SKent Overstreet return -1; 8521c6fdbd8SKent Overstreet 8531c6fdbd8SKent Overstreet __bio_add_page(bio, page, PAGE_SIZE, 0); 8541c6fdbd8SKent Overstreet return 0; 8551c6fdbd8SKent Overstreet } 8561c6fdbd8SKent Overstreet 8571c6fdbd8SKent Overstreet /* readpage(s): */ 8581c6fdbd8SKent Overstreet 8591c6fdbd8SKent Overstreet static void bch2_readpages_end_io(struct bio *bio) 8601c6fdbd8SKent Overstreet { 8611c6fdbd8SKent Overstreet struct bvec_iter_all iter; 8621c6fdbd8SKent Overstreet struct bio_vec *bv; 8631c6fdbd8SKent Overstreet 8641c6fdbd8SKent Overstreet bio_for_each_segment_all(bv, bio, iter) { 8651c6fdbd8SKent Overstreet struct page *page = bv->bv_page; 8661c6fdbd8SKent Overstreet 8671c6fdbd8SKent Overstreet if (!bio->bi_status) { 8681c6fdbd8SKent Overstreet SetPageUptodate(page); 8691c6fdbd8SKent Overstreet } else { 8701c6fdbd8SKent Overstreet ClearPageUptodate(page); 8711c6fdbd8SKent Overstreet SetPageError(page); 8721c6fdbd8SKent Overstreet } 8731c6fdbd8SKent Overstreet unlock_page(page); 8741c6fdbd8SKent Overstreet } 8751c6fdbd8SKent Overstreet 8761c6fdbd8SKent Overstreet bio_put(bio); 8771c6fdbd8SKent Overstreet } 8781c6fdbd8SKent Overstreet 8791c6fdbd8SKent Overstreet static inline void page_state_init_for_read(struct page *page) 8801c6fdbd8SKent Overstreet { 8811c6fdbd8SKent Overstreet struct bch_page_state *s = page_state(page); 8821c6fdbd8SKent Overstreet 8831c6fdbd8SKent Overstreet BUG_ON(s->reserved); 8841c6fdbd8SKent Overstreet s->sectors = 0; 8851c6fdbd8SKent Overstreet s->compressed = 0; 8861c6fdbd8SKent Overstreet } 8871c6fdbd8SKent Overstreet 8881c6fdbd8SKent Overstreet struct readpages_iter { 8891c6fdbd8SKent Overstreet struct address_space *mapping; 8901c6fdbd8SKent Overstreet struct page **pages; 8911c6fdbd8SKent Overstreet unsigned nr_pages; 8921c6fdbd8SKent Overstreet unsigned idx; 8931c6fdbd8SKent Overstreet pgoff_t offset; 8941c6fdbd8SKent Overstreet }; 8951c6fdbd8SKent Overstreet 8961c6fdbd8SKent Overstreet static int readpages_iter_init(struct readpages_iter *iter, 8971c6fdbd8SKent Overstreet struct readahead_control *ractl) 8981c6fdbd8SKent Overstreet { 8991c6fdbd8SKent Overstreet unsigned i, nr_pages = readahead_count(ractl); 9001c6fdbd8SKent Overstreet 9011c6fdbd8SKent Overstreet memset(iter, 0, sizeof(*iter)); 9021c6fdbd8SKent Overstreet 9031c6fdbd8SKent Overstreet iter->mapping = ractl->mapping; 9041c6fdbd8SKent Overstreet iter->offset = readahead_index(ractl); 9051c6fdbd8SKent Overstreet iter->nr_pages = nr_pages; 9061c6fdbd8SKent Overstreet 9071c6fdbd8SKent Overstreet iter->pages = kmalloc_array(nr_pages, sizeof(struct page *), GFP_NOFS); 9081c6fdbd8SKent Overstreet if (!iter->pages) 9091c6fdbd8SKent Overstreet return -ENOMEM; 9101c6fdbd8SKent Overstreet 9111c6fdbd8SKent Overstreet __readahead_batch(ractl, iter->pages, nr_pages); 9121c6fdbd8SKent Overstreet for (i = 0; i < nr_pages; i++) { 9131c6fdbd8SKent Overstreet put_page(iter->pages[i]); 9141c6fdbd8SKent Overstreet } 9151c6fdbd8SKent Overstreet 9161c6fdbd8SKent Overstreet return 0; 9171c6fdbd8SKent Overstreet } 9181c6fdbd8SKent Overstreet 9191c6fdbd8SKent Overstreet static inline struct page *readpage_iter_next(struct readpages_iter *iter) 9201c6fdbd8SKent Overstreet { 9211c6fdbd8SKent Overstreet if (iter->idx >= iter->nr_pages) 9221c6fdbd8SKent Overstreet return NULL; 9231c6fdbd8SKent Overstreet 9241c6fdbd8SKent Overstreet EBUG_ON(iter->pages[iter->idx]->index != iter->offset + iter->idx); 9251c6fdbd8SKent Overstreet 9261c6fdbd8SKent Overstreet page_state_init_for_read(iter->pages[iter->idx]); 9271c6fdbd8SKent Overstreet return iter->pages[iter->idx]; 9281c6fdbd8SKent Overstreet } 9291c6fdbd8SKent Overstreet 9301c6fdbd8SKent Overstreet static void bch2_add_page_sectors(struct bio *bio, struct bkey_s_c k) 9311c6fdbd8SKent Overstreet { 9321c6fdbd8SKent Overstreet struct bvec_iter iter; 9331c6fdbd8SKent Overstreet struct bio_vec bv; 9341c6fdbd8SKent Overstreet bool compressed = bch2_extent_is_compressed(k); 9351c6fdbd8SKent Overstreet unsigned nr_ptrs = bch2_extent_nr_dirty_ptrs(k); 9361c6fdbd8SKent Overstreet 9371c6fdbd8SKent Overstreet bio_for_each_segment(bv, bio, iter) { 9381c6fdbd8SKent Overstreet struct bch_page_state *s = page_state(bv.bv_page); 9391c6fdbd8SKent Overstreet 9401c6fdbd8SKent Overstreet /* sectors in @k from the start of this page: */ 9411c6fdbd8SKent Overstreet unsigned k_sectors = k.k->size - (iter.bi_sector - k.k->p.offset); 9421c6fdbd8SKent Overstreet 9431c6fdbd8SKent Overstreet unsigned page_sectors = min(bv.bv_len >> 9, k_sectors); 9441c6fdbd8SKent Overstreet 9451c6fdbd8SKent Overstreet s->nr_replicas = !s->sectors 9461c6fdbd8SKent Overstreet ? nr_ptrs 9471c6fdbd8SKent Overstreet : min_t(unsigned, s->nr_replicas, nr_ptrs); 9481c6fdbd8SKent Overstreet 9491c6fdbd8SKent Overstreet BUG_ON(s->sectors + page_sectors > PAGE_SECTORS); 9501c6fdbd8SKent Overstreet s->sectors += page_sectors; 9511c6fdbd8SKent Overstreet 9521c6fdbd8SKent Overstreet s->compressed |= compressed; 9531c6fdbd8SKent Overstreet } 9541c6fdbd8SKent Overstreet } 9551c6fdbd8SKent Overstreet 9561c6fdbd8SKent Overstreet static void readpage_bio_extend(struct readpages_iter *iter, 9571c6fdbd8SKent Overstreet struct bio *bio, u64 offset, 9581c6fdbd8SKent Overstreet bool get_more) 9591c6fdbd8SKent Overstreet { 9601c6fdbd8SKent Overstreet while (bio_end_sector(bio) < offset && 9611c6fdbd8SKent Overstreet bio->bi_vcnt < bio->bi_max_vecs) { 9621c6fdbd8SKent Overstreet pgoff_t page_offset = bio_end_sector(bio) >> PAGE_SECTOR_SHIFT; 9631c6fdbd8SKent Overstreet struct page *page = readpage_iter_next(iter); 9641c6fdbd8SKent Overstreet int ret; 9651c6fdbd8SKent Overstreet 9661c6fdbd8SKent Overstreet if (page) { 9671c6fdbd8SKent Overstreet if (iter->offset + iter->idx != page_offset) 9681c6fdbd8SKent Overstreet break; 9691c6fdbd8SKent Overstreet 9701c6fdbd8SKent Overstreet iter->idx++; 9711c6fdbd8SKent Overstreet } else { 9721c6fdbd8SKent Overstreet if (!get_more) 9731c6fdbd8SKent Overstreet break; 9741c6fdbd8SKent Overstreet 9751c6fdbd8SKent Overstreet page = xa_load(&iter->mapping->i_pages, page_offset); 9761c6fdbd8SKent Overstreet if (page && !xa_is_value(page)) 9771c6fdbd8SKent Overstreet break; 9781c6fdbd8SKent Overstreet 9791c6fdbd8SKent Overstreet page = __page_cache_alloc(readahead_gfp_mask(iter->mapping)); 9801c6fdbd8SKent Overstreet if (!page) 9811c6fdbd8SKent Overstreet break; 9821c6fdbd8SKent Overstreet 9831c6fdbd8SKent Overstreet page_state_init_for_read(page); 9841c6fdbd8SKent Overstreet 9851c6fdbd8SKent Overstreet ret = add_to_page_cache_lru(page, iter->mapping, 9861c6fdbd8SKent Overstreet page_offset, GFP_NOFS); 9871c6fdbd8SKent Overstreet if (ret) { 9881c6fdbd8SKent Overstreet ClearPagePrivate(page); 9891c6fdbd8SKent Overstreet put_page(page); 9901c6fdbd8SKent Overstreet break; 9911c6fdbd8SKent Overstreet } 9921c6fdbd8SKent Overstreet 9931c6fdbd8SKent Overstreet put_page(page); 9941c6fdbd8SKent Overstreet } 9951c6fdbd8SKent Overstreet 9961c6fdbd8SKent Overstreet __bio_add_page(bio, page, PAGE_SIZE, 0); 9971c6fdbd8SKent Overstreet } 9981c6fdbd8SKent Overstreet } 9991c6fdbd8SKent Overstreet 10001c6fdbd8SKent Overstreet static void bchfs_read(struct bch_fs *c, struct btree_iter *iter, 10011c6fdbd8SKent Overstreet struct bch_read_bio *rbio, u64 inum, 10021c6fdbd8SKent Overstreet struct readpages_iter *readpages_iter) 10031c6fdbd8SKent Overstreet { 10041c6fdbd8SKent Overstreet struct bio *bio = &rbio->bio; 10051c6fdbd8SKent Overstreet int flags = BCH_READ_RETRY_IF_STALE| 10061c6fdbd8SKent Overstreet BCH_READ_MAY_PROMOTE; 10071c6fdbd8SKent Overstreet 10081c6fdbd8SKent Overstreet rbio->c = c; 10091c6fdbd8SKent Overstreet rbio->start_time = local_clock(); 10101c6fdbd8SKent Overstreet 10111c6fdbd8SKent Overstreet while (1) { 10121c6fdbd8SKent Overstreet BKEY_PADDED(k) tmp; 10131c6fdbd8SKent Overstreet struct bkey_s_c k; 10141c6fdbd8SKent Overstreet unsigned bytes; 10151c6fdbd8SKent Overstreet 10161c6fdbd8SKent Overstreet bch2_btree_iter_set_pos(iter, POS(inum, bio->bi_iter.bi_sector)); 10171c6fdbd8SKent Overstreet 10181c6fdbd8SKent Overstreet k = bch2_btree_iter_peek_slot(iter); 10191c6fdbd8SKent Overstreet BUG_ON(!k.k); 10201c6fdbd8SKent Overstreet 10211c6fdbd8SKent Overstreet if (IS_ERR(k.k)) { 10221c6fdbd8SKent Overstreet int ret = bch2_btree_iter_unlock(iter); 10231c6fdbd8SKent Overstreet BUG_ON(!ret); 10241c6fdbd8SKent Overstreet bcache_io_error(c, bio, "btree IO error %i", ret); 10251c6fdbd8SKent Overstreet bio_endio(bio); 10261c6fdbd8SKent Overstreet return; 10271c6fdbd8SKent Overstreet } 10281c6fdbd8SKent Overstreet 10291c6fdbd8SKent Overstreet bkey_reassemble(&tmp.k, k); 10301c6fdbd8SKent Overstreet bch2_btree_iter_unlock(iter); 10311c6fdbd8SKent Overstreet k = bkey_i_to_s_c(&tmp.k); 10321c6fdbd8SKent Overstreet 10331c6fdbd8SKent Overstreet if (readpages_iter) { 10341c6fdbd8SKent Overstreet bool want_full_extent = false; 10351c6fdbd8SKent Overstreet 10361c6fdbd8SKent Overstreet if (bkey_extent_is_data(k.k)) { 10371c6fdbd8SKent Overstreet struct bkey_s_c_extent e = bkey_s_c_to_extent(k); 10381c6fdbd8SKent Overstreet struct bch_extent_crc_unpacked crc; 10391c6fdbd8SKent Overstreet const union bch_extent_entry *i; 10401c6fdbd8SKent Overstreet 10411c6fdbd8SKent Overstreet extent_for_each_crc(e, crc, i) 10421c6fdbd8SKent Overstreet want_full_extent |= ((crc.csum_type != 0) | 10431c6fdbd8SKent Overstreet (crc.compression_type != 0)); 10441c6fdbd8SKent Overstreet } 10451c6fdbd8SKent Overstreet 10461c6fdbd8SKent Overstreet readpage_bio_extend(readpages_iter, 10471c6fdbd8SKent Overstreet bio, k.k->p.offset, 10481c6fdbd8SKent Overstreet want_full_extent); 10491c6fdbd8SKent Overstreet } 10501c6fdbd8SKent Overstreet 10511c6fdbd8SKent Overstreet bytes = (min_t(u64, k.k->p.offset, bio_end_sector(bio)) - 10521c6fdbd8SKent Overstreet bio->bi_iter.bi_sector) << 9; 10531c6fdbd8SKent Overstreet swap(bio->bi_iter.bi_size, bytes); 10541c6fdbd8SKent Overstreet 10551c6fdbd8SKent Overstreet if (bytes == bio->bi_iter.bi_size) 10561c6fdbd8SKent Overstreet flags |= BCH_READ_LAST_FRAGMENT; 10571c6fdbd8SKent Overstreet 10581c6fdbd8SKent Overstreet if (bkey_extent_is_allocation(k.k)) 10591c6fdbd8SKent Overstreet bch2_add_page_sectors(bio, k); 10601c6fdbd8SKent Overstreet 10611c6fdbd8SKent Overstreet bch2_read_extent(c, rbio, k, flags); 10621c6fdbd8SKent Overstreet 10631c6fdbd8SKent Overstreet if (flags & BCH_READ_LAST_FRAGMENT) 10641c6fdbd8SKent Overstreet return; 10651c6fdbd8SKent Overstreet 10661c6fdbd8SKent Overstreet swap(bio->bi_iter.bi_size, bytes); 10671c6fdbd8SKent Overstreet bio_advance(bio, bytes); 10681c6fdbd8SKent Overstreet } 10691c6fdbd8SKent Overstreet } 10701c6fdbd8SKent Overstreet 10711c6fdbd8SKent Overstreet void bch2_readahead(struct readahead_control *ractl) 10721c6fdbd8SKent Overstreet { 10731c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(ractl->mapping->host); 10741c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 10751c6fdbd8SKent Overstreet struct bch_io_opts opts = io_opts(c, inode); 10761c6fdbd8SKent Overstreet struct btree_iter iter; 10771c6fdbd8SKent Overstreet struct page *page; 10781c6fdbd8SKent Overstreet struct readpages_iter readpages_iter; 10791c6fdbd8SKent Overstreet int ret; 10801c6fdbd8SKent Overstreet 10811c6fdbd8SKent Overstreet ret = readpages_iter_init(&readpages_iter, ractl); 10821c6fdbd8SKent Overstreet BUG_ON(ret); 10831c6fdbd8SKent Overstreet 10841c6fdbd8SKent Overstreet bch2_btree_iter_init(&iter, c, BTREE_ID_EXTENTS, POS_MIN, 10851c6fdbd8SKent Overstreet BTREE_ITER_SLOTS); 10861c6fdbd8SKent Overstreet 10871c6fdbd8SKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 10881c6fdbd8SKent Overstreet 10891c6fdbd8SKent Overstreet while ((page = readpage_iter_next(&readpages_iter))) { 10901c6fdbd8SKent Overstreet pgoff_t index = readpages_iter.offset + readpages_iter.idx; 10911c6fdbd8SKent Overstreet unsigned n = min_t(unsigned, 10921c6fdbd8SKent Overstreet readpages_iter.nr_pages - 10931c6fdbd8SKent Overstreet readpages_iter.idx, 10941c6fdbd8SKent Overstreet BIO_MAX_VECS); 10951c6fdbd8SKent Overstreet struct bch_read_bio *rbio = 10961c6fdbd8SKent Overstreet rbio_init(bio_alloc_bioset(NULL, n, REQ_OP_READ, 10971c6fdbd8SKent Overstreet GFP_NOFS, &c->bio_read), 10981c6fdbd8SKent Overstreet opts); 10991c6fdbd8SKent Overstreet 11001c6fdbd8SKent Overstreet readpages_iter.idx++; 11011c6fdbd8SKent Overstreet 11021c6fdbd8SKent Overstreet rbio->bio.bi_iter.bi_sector = (sector_t) index << PAGE_SECTOR_SHIFT; 11031c6fdbd8SKent Overstreet rbio->bio.bi_end_io = bch2_readpages_end_io; 11041c6fdbd8SKent Overstreet __bio_add_page(&rbio->bio, page, PAGE_SIZE, 0); 11051c6fdbd8SKent Overstreet 11061c6fdbd8SKent Overstreet bchfs_read(c, &iter, rbio, inode->v.i_ino, &readpages_iter); 11071c6fdbd8SKent Overstreet } 11081c6fdbd8SKent Overstreet 11091c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 11101c6fdbd8SKent Overstreet kfree(readpages_iter.pages); 11111c6fdbd8SKent Overstreet } 11121c6fdbd8SKent Overstreet 11131c6fdbd8SKent Overstreet static void __bchfs_readpage(struct bch_fs *c, struct bch_read_bio *rbio, 11141c6fdbd8SKent Overstreet u64 inum, struct page *page) 11151c6fdbd8SKent Overstreet { 11161c6fdbd8SKent Overstreet struct btree_iter iter; 11171c6fdbd8SKent Overstreet 11181c6fdbd8SKent Overstreet page_state_init_for_read(page); 11191c6fdbd8SKent Overstreet 11201c6fdbd8SKent Overstreet rbio->bio.bi_opf = REQ_OP_READ|REQ_SYNC; 11211c6fdbd8SKent Overstreet bio_add_page_contig(&rbio->bio, page); 11221c6fdbd8SKent Overstreet 11231c6fdbd8SKent Overstreet bch2_btree_iter_init(&iter, c, BTREE_ID_EXTENTS, POS_MIN, 11241c6fdbd8SKent Overstreet BTREE_ITER_SLOTS); 11251c6fdbd8SKent Overstreet bchfs_read(c, &iter, rbio, inum, NULL); 11261c6fdbd8SKent Overstreet } 11271c6fdbd8SKent Overstreet 11281c6fdbd8SKent Overstreet static void bch2_read_single_page_end_io(struct bio *bio) 11291c6fdbd8SKent Overstreet { 11301c6fdbd8SKent Overstreet complete(bio->bi_private); 11311c6fdbd8SKent Overstreet } 11321c6fdbd8SKent Overstreet 11331c6fdbd8SKent Overstreet static int bch2_read_single_page(struct page *page, 11341c6fdbd8SKent Overstreet struct address_space *mapping) 11351c6fdbd8SKent Overstreet { 11361c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(mapping->host); 11371c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 11381c6fdbd8SKent Overstreet struct bch_read_bio *rbio; 11391c6fdbd8SKent Overstreet int ret; 11401c6fdbd8SKent Overstreet DECLARE_COMPLETION_ONSTACK(done); 11411c6fdbd8SKent Overstreet 11421c6fdbd8SKent Overstreet rbio = rbio_init(bio_alloc_bioset(NULL, 1, REQ_OP_READ, GFP_NOFS, &c->bio_read), 11431c6fdbd8SKent Overstreet io_opts(c, inode)); 11441c6fdbd8SKent Overstreet rbio->bio.bi_private = &done; 11451c6fdbd8SKent Overstreet rbio->bio.bi_end_io = bch2_read_single_page_end_io; 11461c6fdbd8SKent Overstreet 11471c6fdbd8SKent Overstreet __bchfs_readpage(c, rbio, inode->v.i_ino, page); 11481c6fdbd8SKent Overstreet wait_for_completion(&done); 11491c6fdbd8SKent Overstreet 11501c6fdbd8SKent Overstreet ret = blk_status_to_errno(rbio->bio.bi_status); 11511c6fdbd8SKent Overstreet bio_put(&rbio->bio); 11521c6fdbd8SKent Overstreet 11531c6fdbd8SKent Overstreet if (ret < 0) 11541c6fdbd8SKent Overstreet return ret; 11551c6fdbd8SKent Overstreet 11561c6fdbd8SKent Overstreet SetPageUptodate(page); 11571c6fdbd8SKent Overstreet return 0; 11581c6fdbd8SKent Overstreet } 11591c6fdbd8SKent Overstreet 11601c6fdbd8SKent Overstreet int bch2_read_folio(struct file *file, struct folio *folio) 11611c6fdbd8SKent Overstreet { 11621c6fdbd8SKent Overstreet struct page *page = &folio->page; 11631c6fdbd8SKent Overstreet int ret; 11641c6fdbd8SKent Overstreet 11651c6fdbd8SKent Overstreet ret = bch2_read_single_page(page, page->mapping); 11661c6fdbd8SKent Overstreet folio_unlock(folio); 11671c6fdbd8SKent Overstreet return ret; 11681c6fdbd8SKent Overstreet } 11691c6fdbd8SKent Overstreet 11701c6fdbd8SKent Overstreet /* writepages: */ 11711c6fdbd8SKent Overstreet 11721c6fdbd8SKent Overstreet struct bch_writepage_state { 11731c6fdbd8SKent Overstreet struct bch_writepage_io *io; 11741c6fdbd8SKent Overstreet struct bch_io_opts opts; 11751c6fdbd8SKent Overstreet }; 11761c6fdbd8SKent Overstreet 11771c6fdbd8SKent Overstreet static inline struct bch_writepage_state bch_writepage_state_init(struct bch_fs *c, 11781c6fdbd8SKent Overstreet struct bch_inode_info *inode) 11791c6fdbd8SKent Overstreet { 11801c6fdbd8SKent Overstreet return (struct bch_writepage_state) { .opts = io_opts(c, inode) }; 11811c6fdbd8SKent Overstreet } 11821c6fdbd8SKent Overstreet 11831c6fdbd8SKent Overstreet static void bch2_writepage_io_free(struct closure *cl) 11841c6fdbd8SKent Overstreet { 11851c6fdbd8SKent Overstreet struct bch_writepage_io *io = container_of(cl, 11861c6fdbd8SKent Overstreet struct bch_writepage_io, cl); 11871c6fdbd8SKent Overstreet 11881c6fdbd8SKent Overstreet bio_put(&io->op.op.wbio.bio); 11891c6fdbd8SKent Overstreet } 11901c6fdbd8SKent Overstreet 11911c6fdbd8SKent Overstreet static void bch2_writepage_io_done(struct closure *cl) 11921c6fdbd8SKent Overstreet { 11931c6fdbd8SKent Overstreet struct bch_writepage_io *io = container_of(cl, 11941c6fdbd8SKent Overstreet struct bch_writepage_io, cl); 11951c6fdbd8SKent Overstreet struct bch_fs *c = io->op.op.c; 11961c6fdbd8SKent Overstreet struct bio *bio = &io->op.op.wbio.bio; 11971c6fdbd8SKent Overstreet struct bvec_iter_all iter; 11981c6fdbd8SKent Overstreet struct bio_vec *bvec; 11991c6fdbd8SKent Overstreet 12001c6fdbd8SKent Overstreet if (io->op.op.error) { 12011c6fdbd8SKent Overstreet bio_for_each_segment_all(bvec, bio, iter) 12021c6fdbd8SKent Overstreet SetPageError(bvec->bv_page); 12031c6fdbd8SKent Overstreet set_bit(AS_EIO, &io->op.inode->v.i_mapping->flags); 12041c6fdbd8SKent Overstreet } 12051c6fdbd8SKent Overstreet 12061c6fdbd8SKent Overstreet /* 12071c6fdbd8SKent Overstreet * racing with fallocate can cause us to add fewer sectors than 12081c6fdbd8SKent Overstreet * expected - but we shouldn't add more sectors than expected: 12091c6fdbd8SKent Overstreet */ 12101c6fdbd8SKent Overstreet BUG_ON(io->op.sectors_added > (s64) io->new_sectors); 12111c6fdbd8SKent Overstreet 12121c6fdbd8SKent Overstreet /* 12131c6fdbd8SKent Overstreet * (error (due to going RO) halfway through a page can screw that up 12141c6fdbd8SKent Overstreet * slightly) 12151c6fdbd8SKent Overstreet * XXX wtf? 12161c6fdbd8SKent Overstreet BUG_ON(io->op.sectors_added - io->new_sectors >= (s64) PAGE_SECTORS); 12171c6fdbd8SKent Overstreet */ 12181c6fdbd8SKent Overstreet 12191c6fdbd8SKent Overstreet /* 12201c6fdbd8SKent Overstreet * PageWriteback is effectively our ref on the inode - fixup i_blocks 12211c6fdbd8SKent Overstreet * before calling end_page_writeback: 12221c6fdbd8SKent Overstreet */ 12231c6fdbd8SKent Overstreet if (io->op.sectors_added != io->new_sectors) 12241c6fdbd8SKent Overstreet i_sectors_acct(c, io->op.inode, NULL, 12251c6fdbd8SKent Overstreet io->op.sectors_added - (s64) io->new_sectors); 12261c6fdbd8SKent Overstreet 12271c6fdbd8SKent Overstreet bio_for_each_segment_all(bvec, bio, iter) 12281c6fdbd8SKent Overstreet end_page_writeback(bvec->bv_page); 12291c6fdbd8SKent Overstreet 12301c6fdbd8SKent Overstreet closure_return_with_destructor(&io->cl, bch2_writepage_io_free); 12311c6fdbd8SKent Overstreet } 12321c6fdbd8SKent Overstreet 12331c6fdbd8SKent Overstreet static void bch2_writepage_do_io(struct bch_writepage_state *w) 12341c6fdbd8SKent Overstreet { 12351c6fdbd8SKent Overstreet struct bch_writepage_io *io = w->io; 12361c6fdbd8SKent Overstreet 12371c6fdbd8SKent Overstreet w->io = NULL; 12381c6fdbd8SKent Overstreet closure_call(&io->op.op.cl, bch2_write, NULL, &io->cl); 12391c6fdbd8SKent Overstreet continue_at(&io->cl, bch2_writepage_io_done, NULL); 12401c6fdbd8SKent Overstreet } 12411c6fdbd8SKent Overstreet 12421c6fdbd8SKent Overstreet /* 12431c6fdbd8SKent Overstreet * Get a bch_writepage_io and add @page to it - appending to an existing one if 12441c6fdbd8SKent Overstreet * possible, else allocating a new one: 12451c6fdbd8SKent Overstreet */ 12461c6fdbd8SKent Overstreet static void bch2_writepage_io_alloc(struct bch_fs *c, 12471c6fdbd8SKent Overstreet struct bch_writepage_state *w, 12481c6fdbd8SKent Overstreet struct bch_inode_info *inode, 12491c6fdbd8SKent Overstreet struct page *page, 12501c6fdbd8SKent Overstreet unsigned nr_replicas) 12511c6fdbd8SKent Overstreet { 12521c6fdbd8SKent Overstreet struct bch_write_op *op; 12531c6fdbd8SKent Overstreet u64 offset = (u64) page->index << PAGE_SECTOR_SHIFT; 12541c6fdbd8SKent Overstreet 12551c6fdbd8SKent Overstreet w->io = container_of(bio_alloc_bioset(NULL, BIO_MAX_VECS, 12561c6fdbd8SKent Overstreet REQ_OP_WRITE, 12571c6fdbd8SKent Overstreet GFP_NOFS, 12581c6fdbd8SKent Overstreet &c->writepage_bioset), 12591c6fdbd8SKent Overstreet struct bch_writepage_io, op.op.wbio.bio); 12601c6fdbd8SKent Overstreet 12611c6fdbd8SKent Overstreet closure_init(&w->io->cl, NULL); 12621c6fdbd8SKent Overstreet w->io->new_sectors = 0; 12631c6fdbd8SKent Overstreet bch2_fswrite_op_init(&w->io->op, c, inode, w->opts, false); 12641c6fdbd8SKent Overstreet op = &w->io->op.op; 12651c6fdbd8SKent Overstreet op->nr_replicas = nr_replicas; 12661c6fdbd8SKent Overstreet op->res.nr_replicas = nr_replicas; 12671c6fdbd8SKent Overstreet op->write_point = writepoint_hashed(inode->ei_last_dirtied); 12681c6fdbd8SKent Overstreet op->pos = POS(inode->v.i_ino, offset); 12691c6fdbd8SKent Overstreet op->wbio.bio.bi_iter.bi_sector = offset; 12701c6fdbd8SKent Overstreet } 12711c6fdbd8SKent Overstreet 12721c6fdbd8SKent Overstreet static int __bch2_writepage(struct folio *folio, 12731c6fdbd8SKent Overstreet struct writeback_control *wbc, 12741c6fdbd8SKent Overstreet void *data) 12751c6fdbd8SKent Overstreet { 12761c6fdbd8SKent Overstreet struct page *page = &folio->page; 12771c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(page->mapping->host); 12781c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 12791c6fdbd8SKent Overstreet struct bch_writepage_state *w = data; 12801c6fdbd8SKent Overstreet struct bch_page_state new, old; 12811c6fdbd8SKent Overstreet unsigned offset; 12821c6fdbd8SKent Overstreet loff_t i_size = i_size_read(&inode->v); 12831c6fdbd8SKent Overstreet pgoff_t end_index = i_size >> PAGE_SHIFT; 12841c6fdbd8SKent Overstreet 12851c6fdbd8SKent Overstreet EBUG_ON(!PageUptodate(page)); 12861c6fdbd8SKent Overstreet 12871c6fdbd8SKent Overstreet /* Is the page fully inside i_size? */ 12881c6fdbd8SKent Overstreet if (page->index < end_index) 12891c6fdbd8SKent Overstreet goto do_io; 12901c6fdbd8SKent Overstreet 12911c6fdbd8SKent Overstreet /* Is the page fully outside i_size? (truncate in progress) */ 12921c6fdbd8SKent Overstreet offset = i_size & (PAGE_SIZE - 1); 12931c6fdbd8SKent Overstreet if (page->index > end_index || !offset) { 12941c6fdbd8SKent Overstreet unlock_page(page); 12951c6fdbd8SKent Overstreet return 0; 12961c6fdbd8SKent Overstreet } 12971c6fdbd8SKent Overstreet 12981c6fdbd8SKent Overstreet /* 12991c6fdbd8SKent Overstreet * The page straddles i_size. It must be zeroed out on each and every 13001c6fdbd8SKent Overstreet * writepage invocation because it may be mmapped. "A file is mapped 13011c6fdbd8SKent Overstreet * in multiples of the page size. For a file that is not a multiple of 13021c6fdbd8SKent Overstreet * the page size, the remaining memory is zeroed when mapped, and 13031c6fdbd8SKent Overstreet * writes to that region are not written out to the file." 13041c6fdbd8SKent Overstreet */ 13051c6fdbd8SKent Overstreet zero_user_segment(page, offset, PAGE_SIZE); 13061c6fdbd8SKent Overstreet do_io: 13071c6fdbd8SKent Overstreet /* Before unlocking the page, transfer reservation to w->io: */ 13081c6fdbd8SKent Overstreet old = page_state_cmpxchg(page_state(page), new, { 13091c6fdbd8SKent Overstreet EBUG_ON(!new.reserved && 13101c6fdbd8SKent Overstreet (new.sectors != PAGE_SECTORS || 13111c6fdbd8SKent Overstreet new.compressed)); 13121c6fdbd8SKent Overstreet 13131c6fdbd8SKent Overstreet if (new.reserved) 13141c6fdbd8SKent Overstreet new.nr_replicas = new.reservation_replicas; 13151c6fdbd8SKent Overstreet new.reserved = 0; 13161c6fdbd8SKent Overstreet 13171c6fdbd8SKent Overstreet new.compressed |= w->opts.compression != 0; 13181c6fdbd8SKent Overstreet 13191c6fdbd8SKent Overstreet new.sectors += new.dirty_sectors; 13201c6fdbd8SKent Overstreet new.dirty_sectors = 0; 13211c6fdbd8SKent Overstreet }); 13221c6fdbd8SKent Overstreet 13231c6fdbd8SKent Overstreet BUG_ON(PageWriteback(page)); 13241c6fdbd8SKent Overstreet set_page_writeback(page); 13251c6fdbd8SKent Overstreet unlock_page(page); 13261c6fdbd8SKent Overstreet 13271c6fdbd8SKent Overstreet if (w->io && 13281c6fdbd8SKent Overstreet (w->io->op.op.res.nr_replicas != new.nr_replicas || 13291c6fdbd8SKent Overstreet !bio_can_add_page_contig(&w->io->op.op.wbio.bio, page))) 13301c6fdbd8SKent Overstreet bch2_writepage_do_io(w); 13311c6fdbd8SKent Overstreet 13321c6fdbd8SKent Overstreet if (!w->io) 13331c6fdbd8SKent Overstreet bch2_writepage_io_alloc(c, w, inode, page, new.nr_replicas); 13341c6fdbd8SKent Overstreet 13351c6fdbd8SKent Overstreet w->io->new_sectors += new.sectors - old.sectors; 13361c6fdbd8SKent Overstreet 13371c6fdbd8SKent Overstreet BUG_ON(inode != w->io->op.inode); 13381c6fdbd8SKent Overstreet BUG_ON(bio_add_page_contig(&w->io->op.op.wbio.bio, page)); 13391c6fdbd8SKent Overstreet 13401c6fdbd8SKent Overstreet if (old.reserved) 13411c6fdbd8SKent Overstreet w->io->op.op.res.sectors += old.reservation_replicas * PAGE_SECTORS; 13421c6fdbd8SKent Overstreet 13431c6fdbd8SKent Overstreet w->io->op.new_i_size = i_size; 13441c6fdbd8SKent Overstreet 13451c6fdbd8SKent Overstreet if (wbc->sync_mode == WB_SYNC_ALL) 13461c6fdbd8SKent Overstreet w->io->op.op.wbio.bio.bi_opf |= REQ_SYNC; 13471c6fdbd8SKent Overstreet 13481c6fdbd8SKent Overstreet return 0; 13491c6fdbd8SKent Overstreet } 13501c6fdbd8SKent Overstreet 13511c6fdbd8SKent Overstreet int bch2_writepages(struct address_space *mapping, struct writeback_control *wbc) 13521c6fdbd8SKent Overstreet { 13531c6fdbd8SKent Overstreet struct bch_fs *c = mapping->host->i_sb->s_fs_info; 13541c6fdbd8SKent Overstreet struct bch_writepage_state w = 13551c6fdbd8SKent Overstreet bch_writepage_state_init(c, to_bch_ei(mapping->host)); 13561c6fdbd8SKent Overstreet struct blk_plug plug; 13571c6fdbd8SKent Overstreet int ret; 13581c6fdbd8SKent Overstreet 13591c6fdbd8SKent Overstreet blk_start_plug(&plug); 13601c6fdbd8SKent Overstreet ret = write_cache_pages(mapping, wbc, __bch2_writepage, &w); 13611c6fdbd8SKent Overstreet if (w.io) 13621c6fdbd8SKent Overstreet bch2_writepage_do_io(&w); 13631c6fdbd8SKent Overstreet blk_finish_plug(&plug); 13641c6fdbd8SKent Overstreet return ret; 13651c6fdbd8SKent Overstreet } 13661c6fdbd8SKent Overstreet 13671c6fdbd8SKent Overstreet int bch2_writepage(struct page *page, struct writeback_control *wbc) 13681c6fdbd8SKent Overstreet { 13691c6fdbd8SKent Overstreet struct bch_fs *c = page->mapping->host->i_sb->s_fs_info; 13701c6fdbd8SKent Overstreet struct bch_writepage_state w = 13711c6fdbd8SKent Overstreet bch_writepage_state_init(c, to_bch_ei(page->mapping->host)); 13721c6fdbd8SKent Overstreet int ret; 13731c6fdbd8SKent Overstreet 13741c6fdbd8SKent Overstreet ret = __bch2_writepage(page_folio(page), wbc, &w); 13751c6fdbd8SKent Overstreet if (w.io) 13761c6fdbd8SKent Overstreet bch2_writepage_do_io(&w); 13771c6fdbd8SKent Overstreet 13781c6fdbd8SKent Overstreet return ret; 13791c6fdbd8SKent Overstreet } 13801c6fdbd8SKent Overstreet 13811c6fdbd8SKent Overstreet /* buffered writes: */ 13821c6fdbd8SKent Overstreet 13831c6fdbd8SKent Overstreet int bch2_write_begin(struct file *file, struct address_space *mapping, 13841c6fdbd8SKent Overstreet loff_t pos, unsigned len, 13851c6fdbd8SKent Overstreet struct page **pagep, void **fsdata) 13861c6fdbd8SKent Overstreet { 13871c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(mapping->host); 13881c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 13891c6fdbd8SKent Overstreet pgoff_t index = pos >> PAGE_SHIFT; 13901c6fdbd8SKent Overstreet unsigned offset = pos & (PAGE_SIZE - 1); 13911c6fdbd8SKent Overstreet struct page *page; 13921c6fdbd8SKent Overstreet int ret = -ENOMEM; 13931c6fdbd8SKent Overstreet 13941c6fdbd8SKent Overstreet BUG_ON(inode_unhashed(&inode->v)); 13951c6fdbd8SKent Overstreet 13961c6fdbd8SKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 13971c6fdbd8SKent Overstreet 13981c6fdbd8SKent Overstreet page = grab_cache_page_write_begin(mapping, index); 13991c6fdbd8SKent Overstreet if (!page) 14001c6fdbd8SKent Overstreet goto err_unlock; 14011c6fdbd8SKent Overstreet 14021c6fdbd8SKent Overstreet if (PageUptodate(page)) 14031c6fdbd8SKent Overstreet goto out; 14041c6fdbd8SKent Overstreet 14051c6fdbd8SKent Overstreet /* If we're writing entire page, don't need to read it in first: */ 14061c6fdbd8SKent Overstreet if (len == PAGE_SIZE) 14071c6fdbd8SKent Overstreet goto out; 14081c6fdbd8SKent Overstreet 14091c6fdbd8SKent Overstreet if (!offset && pos + len >= inode->v.i_size) { 14101c6fdbd8SKent Overstreet zero_user_segment(page, len, PAGE_SIZE); 14111c6fdbd8SKent Overstreet flush_dcache_page(page); 14121c6fdbd8SKent Overstreet goto out; 14131c6fdbd8SKent Overstreet } 14141c6fdbd8SKent Overstreet 14151c6fdbd8SKent Overstreet if (index > inode->v.i_size >> PAGE_SHIFT) { 14161c6fdbd8SKent Overstreet zero_user_segments(page, 0, offset, offset + len, PAGE_SIZE); 14171c6fdbd8SKent Overstreet flush_dcache_page(page); 14181c6fdbd8SKent Overstreet goto out; 14191c6fdbd8SKent Overstreet } 14201c6fdbd8SKent Overstreet readpage: 14211c6fdbd8SKent Overstreet ret = bch2_read_single_page(page, mapping); 14221c6fdbd8SKent Overstreet if (ret) 14231c6fdbd8SKent Overstreet goto err; 14241c6fdbd8SKent Overstreet out: 14251c6fdbd8SKent Overstreet ret = bch2_get_page_reservation(c, inode, page, true); 14261c6fdbd8SKent Overstreet if (ret) { 14271c6fdbd8SKent Overstreet if (!PageUptodate(page)) { 14281c6fdbd8SKent Overstreet /* 14291c6fdbd8SKent Overstreet * If the page hasn't been read in, we won't know if we 14301c6fdbd8SKent Overstreet * actually need a reservation - we don't actually need 14311c6fdbd8SKent Overstreet * to read here, we just need to check if the page is 14321c6fdbd8SKent Overstreet * fully backed by uncompressed data: 14331c6fdbd8SKent Overstreet */ 14341c6fdbd8SKent Overstreet goto readpage; 14351c6fdbd8SKent Overstreet } 14361c6fdbd8SKent Overstreet 14371c6fdbd8SKent Overstreet goto err; 14381c6fdbd8SKent Overstreet } 14391c6fdbd8SKent Overstreet 14401c6fdbd8SKent Overstreet *pagep = page; 14411c6fdbd8SKent Overstreet return 0; 14421c6fdbd8SKent Overstreet err: 14431c6fdbd8SKent Overstreet unlock_page(page); 14441c6fdbd8SKent Overstreet put_page(page); 14451c6fdbd8SKent Overstreet *pagep = NULL; 14461c6fdbd8SKent Overstreet err_unlock: 14471c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 14481c6fdbd8SKent Overstreet return ret; 14491c6fdbd8SKent Overstreet } 14501c6fdbd8SKent Overstreet 14511c6fdbd8SKent Overstreet int bch2_write_end(struct file *file, struct address_space *mapping, 14521c6fdbd8SKent Overstreet loff_t pos, unsigned len, unsigned copied, 14531c6fdbd8SKent Overstreet struct page *page, void *fsdata) 14541c6fdbd8SKent Overstreet { 14551c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(mapping->host); 14561c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 14571c6fdbd8SKent Overstreet 14581c6fdbd8SKent Overstreet lockdep_assert_held(&inode->v.i_rwsem); 14591c6fdbd8SKent Overstreet 14601c6fdbd8SKent Overstreet if (unlikely(copied < len && !PageUptodate(page))) { 14611c6fdbd8SKent Overstreet /* 14621c6fdbd8SKent Overstreet * The page needs to be read in, but that would destroy 14631c6fdbd8SKent Overstreet * our partial write - simplest thing is to just force 14641c6fdbd8SKent Overstreet * userspace to redo the write: 14651c6fdbd8SKent Overstreet */ 14661c6fdbd8SKent Overstreet zero_user(page, 0, PAGE_SIZE); 14671c6fdbd8SKent Overstreet flush_dcache_page(page); 14681c6fdbd8SKent Overstreet copied = 0; 14691c6fdbd8SKent Overstreet } 14701c6fdbd8SKent Overstreet 14711c6fdbd8SKent Overstreet spin_lock(&inode->v.i_lock); 14721c6fdbd8SKent Overstreet if (pos + copied > inode->v.i_size) 14731c6fdbd8SKent Overstreet i_size_write(&inode->v, pos + copied); 14741c6fdbd8SKent Overstreet spin_unlock(&inode->v.i_lock); 14751c6fdbd8SKent Overstreet 14761c6fdbd8SKent Overstreet if (copied) { 14771c6fdbd8SKent Overstreet if (!PageUptodate(page)) 14781c6fdbd8SKent Overstreet SetPageUptodate(page); 14791c6fdbd8SKent Overstreet if (!PageDirty(page)) 14801c6fdbd8SKent Overstreet set_page_dirty(page); 14811c6fdbd8SKent Overstreet 14821c6fdbd8SKent Overstreet inode->ei_last_dirtied = (unsigned long) current; 14831c6fdbd8SKent Overstreet } else { 14841c6fdbd8SKent Overstreet bch2_put_page_reservation(c, inode, page); 14851c6fdbd8SKent Overstreet } 14861c6fdbd8SKent Overstreet 14871c6fdbd8SKent Overstreet unlock_page(page); 14881c6fdbd8SKent Overstreet put_page(page); 14891c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 14901c6fdbd8SKent Overstreet 14911c6fdbd8SKent Overstreet return copied; 14921c6fdbd8SKent Overstreet } 14931c6fdbd8SKent Overstreet 14941c6fdbd8SKent Overstreet #define WRITE_BATCH_PAGES 32 14951c6fdbd8SKent Overstreet 14961c6fdbd8SKent Overstreet static int __bch2_buffered_write(struct bch_inode_info *inode, 14971c6fdbd8SKent Overstreet struct address_space *mapping, 14981c6fdbd8SKent Overstreet struct iov_iter *iter, 14991c6fdbd8SKent Overstreet loff_t pos, unsigned len) 15001c6fdbd8SKent Overstreet { 15011c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 15021c6fdbd8SKent Overstreet struct page *pages[WRITE_BATCH_PAGES]; 15031c6fdbd8SKent Overstreet unsigned long index = pos >> PAGE_SHIFT; 15041c6fdbd8SKent Overstreet unsigned offset = pos & (PAGE_SIZE - 1); 15051c6fdbd8SKent Overstreet unsigned nr_pages = DIV_ROUND_UP(offset + len, PAGE_SIZE); 15061c6fdbd8SKent Overstreet unsigned i, copied = 0, nr_pages_copied = 0; 15071c6fdbd8SKent Overstreet int ret = 0; 15081c6fdbd8SKent Overstreet 15091c6fdbd8SKent Overstreet BUG_ON(!len); 15101c6fdbd8SKent Overstreet BUG_ON(nr_pages > ARRAY_SIZE(pages)); 15111c6fdbd8SKent Overstreet 15121c6fdbd8SKent Overstreet for (i = 0; i < nr_pages; i++) { 15131c6fdbd8SKent Overstreet pages[i] = grab_cache_page_write_begin(mapping, index + i); 15141c6fdbd8SKent Overstreet if (!pages[i]) { 15151c6fdbd8SKent Overstreet nr_pages = i; 15161c6fdbd8SKent Overstreet ret = -ENOMEM; 15171c6fdbd8SKent Overstreet goto out; 15181c6fdbd8SKent Overstreet } 15191c6fdbd8SKent Overstreet } 15201c6fdbd8SKent Overstreet 15211c6fdbd8SKent Overstreet if (offset && !PageUptodate(pages[0])) { 15221c6fdbd8SKent Overstreet ret = bch2_read_single_page(pages[0], mapping); 15231c6fdbd8SKent Overstreet if (ret) 15241c6fdbd8SKent Overstreet goto out; 15251c6fdbd8SKent Overstreet } 15261c6fdbd8SKent Overstreet 15271c6fdbd8SKent Overstreet if ((pos + len) & (PAGE_SIZE - 1) && 15281c6fdbd8SKent Overstreet !PageUptodate(pages[nr_pages - 1])) { 15291c6fdbd8SKent Overstreet if ((index + nr_pages - 1) << PAGE_SHIFT >= inode->v.i_size) { 15301c6fdbd8SKent Overstreet zero_user(pages[nr_pages - 1], 0, PAGE_SIZE); 15311c6fdbd8SKent Overstreet } else { 15321c6fdbd8SKent Overstreet ret = bch2_read_single_page(pages[nr_pages - 1], mapping); 15331c6fdbd8SKent Overstreet if (ret) 15341c6fdbd8SKent Overstreet goto out; 15351c6fdbd8SKent Overstreet } 15361c6fdbd8SKent Overstreet } 15371c6fdbd8SKent Overstreet 15381c6fdbd8SKent Overstreet for (i = 0; i < nr_pages; i++) { 15391c6fdbd8SKent Overstreet ret = bch2_get_page_reservation(c, inode, pages[i], true); 15401c6fdbd8SKent Overstreet 15411c6fdbd8SKent Overstreet if (ret && !PageUptodate(pages[i])) { 15421c6fdbd8SKent Overstreet ret = bch2_read_single_page(pages[i], mapping); 15431c6fdbd8SKent Overstreet if (ret) 15441c6fdbd8SKent Overstreet goto out; 15451c6fdbd8SKent Overstreet 15461c6fdbd8SKent Overstreet ret = bch2_get_page_reservation(c, inode, pages[i], true); 15471c6fdbd8SKent Overstreet } 15481c6fdbd8SKent Overstreet 15491c6fdbd8SKent Overstreet if (ret) 15501c6fdbd8SKent Overstreet goto out; 15511c6fdbd8SKent Overstreet } 15521c6fdbd8SKent Overstreet 15531c6fdbd8SKent Overstreet if (mapping_writably_mapped(mapping)) 15541c6fdbd8SKent Overstreet for (i = 0; i < nr_pages; i++) 15551c6fdbd8SKent Overstreet flush_dcache_page(pages[i]); 15561c6fdbd8SKent Overstreet 15571c6fdbd8SKent Overstreet while (copied < len) { 15581c6fdbd8SKent Overstreet struct page *page = pages[(offset + copied) >> PAGE_SHIFT]; 15591c6fdbd8SKent Overstreet unsigned pg_offset = (offset + copied) & (PAGE_SIZE - 1); 15601c6fdbd8SKent Overstreet unsigned pg_bytes = min_t(unsigned, len - copied, 15611c6fdbd8SKent Overstreet PAGE_SIZE - pg_offset); 15621c6fdbd8SKent Overstreet unsigned pg_copied = copy_page_from_iter_atomic(page, 15631c6fdbd8SKent Overstreet pg_offset, pg_bytes, iter); 15641c6fdbd8SKent Overstreet 15651c6fdbd8SKent Overstreet flush_dcache_page(page); 15661c6fdbd8SKent Overstreet copied += pg_copied; 15671c6fdbd8SKent Overstreet 15681c6fdbd8SKent Overstreet if (pg_copied != pg_bytes) 15691c6fdbd8SKent Overstreet break; 15701c6fdbd8SKent Overstreet } 15711c6fdbd8SKent Overstreet 15721c6fdbd8SKent Overstreet if (!copied) 15731c6fdbd8SKent Overstreet goto out; 15741c6fdbd8SKent Overstreet 15751c6fdbd8SKent Overstreet nr_pages_copied = DIV_ROUND_UP(offset + copied, PAGE_SIZE); 15761c6fdbd8SKent Overstreet inode->ei_last_dirtied = (unsigned long) current; 15771c6fdbd8SKent Overstreet 15781c6fdbd8SKent Overstreet spin_lock(&inode->v.i_lock); 15791c6fdbd8SKent Overstreet if (pos + copied > inode->v.i_size) 15801c6fdbd8SKent Overstreet i_size_write(&inode->v, pos + copied); 15811c6fdbd8SKent Overstreet spin_unlock(&inode->v.i_lock); 15821c6fdbd8SKent Overstreet 15831c6fdbd8SKent Overstreet if (copied < len && 15841c6fdbd8SKent Overstreet ((offset + copied) & (PAGE_SIZE - 1))) { 15851c6fdbd8SKent Overstreet struct page *page = pages[(offset + copied) >> PAGE_SHIFT]; 15861c6fdbd8SKent Overstreet 15871c6fdbd8SKent Overstreet if (!PageUptodate(page)) { 15881c6fdbd8SKent Overstreet zero_user(page, 0, PAGE_SIZE); 15891c6fdbd8SKent Overstreet copied -= (offset + copied) & (PAGE_SIZE - 1); 15901c6fdbd8SKent Overstreet } 15911c6fdbd8SKent Overstreet } 15921c6fdbd8SKent Overstreet out: 15931c6fdbd8SKent Overstreet for (i = 0; i < nr_pages_copied; i++) { 15941c6fdbd8SKent Overstreet if (!PageUptodate(pages[i])) 15951c6fdbd8SKent Overstreet SetPageUptodate(pages[i]); 15961c6fdbd8SKent Overstreet if (!PageDirty(pages[i])) 15971c6fdbd8SKent Overstreet set_page_dirty(pages[i]); 15981c6fdbd8SKent Overstreet unlock_page(pages[i]); 15991c6fdbd8SKent Overstreet put_page(pages[i]); 16001c6fdbd8SKent Overstreet } 16011c6fdbd8SKent Overstreet 16021c6fdbd8SKent Overstreet for (i = nr_pages_copied; i < nr_pages; i++) { 16031c6fdbd8SKent Overstreet if (!PageDirty(pages[i])) 16041c6fdbd8SKent Overstreet bch2_put_page_reservation(c, inode, pages[i]); 16051c6fdbd8SKent Overstreet unlock_page(pages[i]); 16061c6fdbd8SKent Overstreet put_page(pages[i]); 16071c6fdbd8SKent Overstreet } 16081c6fdbd8SKent Overstreet 16091c6fdbd8SKent Overstreet return copied ?: ret; 16101c6fdbd8SKent Overstreet } 16111c6fdbd8SKent Overstreet 16121c6fdbd8SKent Overstreet static ssize_t bch2_buffered_write(struct kiocb *iocb, struct iov_iter *iter) 16131c6fdbd8SKent Overstreet { 16141c6fdbd8SKent Overstreet struct file *file = iocb->ki_filp; 16151c6fdbd8SKent Overstreet struct address_space *mapping = file->f_mapping; 16161c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 16171c6fdbd8SKent Overstreet loff_t pos = iocb->ki_pos; 16181c6fdbd8SKent Overstreet ssize_t written = 0; 16191c6fdbd8SKent Overstreet int ret = 0; 16201c6fdbd8SKent Overstreet 16211c6fdbd8SKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 16221c6fdbd8SKent Overstreet 16231c6fdbd8SKent Overstreet do { 16241c6fdbd8SKent Overstreet unsigned offset = pos & (PAGE_SIZE - 1); 16251c6fdbd8SKent Overstreet unsigned bytes = min_t(unsigned long, iov_iter_count(iter), 16261c6fdbd8SKent Overstreet PAGE_SIZE * WRITE_BATCH_PAGES - offset); 16271c6fdbd8SKent Overstreet again: 16281c6fdbd8SKent Overstreet /* 16291c6fdbd8SKent Overstreet * Bring in the user page that we will copy from _first_. 16301c6fdbd8SKent Overstreet * Otherwise there's a nasty deadlock on copying from the 16311c6fdbd8SKent Overstreet * same page as we're writing to, without it being marked 16321c6fdbd8SKent Overstreet * up-to-date. 16331c6fdbd8SKent Overstreet * 16341c6fdbd8SKent Overstreet * Not only is this an optimisation, but it is also required 16351c6fdbd8SKent Overstreet * to check that the address is actually valid, when atomic 16361c6fdbd8SKent Overstreet * usercopies are used, below. 16371c6fdbd8SKent Overstreet */ 16381c6fdbd8SKent Overstreet if (unlikely(fault_in_iov_iter_readable(iter, bytes))) { 16391c6fdbd8SKent Overstreet bytes = min_t(unsigned long, iov_iter_count(iter), 16401c6fdbd8SKent Overstreet PAGE_SIZE - offset); 16411c6fdbd8SKent Overstreet 16421c6fdbd8SKent Overstreet if (unlikely(fault_in_iov_iter_readable(iter, bytes))) { 16431c6fdbd8SKent Overstreet ret = -EFAULT; 16441c6fdbd8SKent Overstreet break; 16451c6fdbd8SKent Overstreet } 16461c6fdbd8SKent Overstreet } 16471c6fdbd8SKent Overstreet 16481c6fdbd8SKent Overstreet if (unlikely(fatal_signal_pending(current))) { 16491c6fdbd8SKent Overstreet ret = -EINTR; 16501c6fdbd8SKent Overstreet break; 16511c6fdbd8SKent Overstreet } 16521c6fdbd8SKent Overstreet 16531c6fdbd8SKent Overstreet ret = __bch2_buffered_write(inode, mapping, iter, pos, bytes); 16541c6fdbd8SKent Overstreet if (unlikely(ret < 0)) 16551c6fdbd8SKent Overstreet break; 16561c6fdbd8SKent Overstreet 16571c6fdbd8SKent Overstreet cond_resched(); 16581c6fdbd8SKent Overstreet 16591c6fdbd8SKent Overstreet if (unlikely(ret == 0)) { 16601c6fdbd8SKent Overstreet /* 16611c6fdbd8SKent Overstreet * If we were unable to copy any data at all, we must 16621c6fdbd8SKent Overstreet * fall back to a single segment length write. 16631c6fdbd8SKent Overstreet * 16641c6fdbd8SKent Overstreet * If we didn't fallback here, we could livelock 16651c6fdbd8SKent Overstreet * because not all segments in the iov can be copied at 16661c6fdbd8SKent Overstreet * once without a pagefault. 16671c6fdbd8SKent Overstreet */ 16681c6fdbd8SKent Overstreet bytes = min_t(unsigned long, PAGE_SIZE - offset, 16691c6fdbd8SKent Overstreet iov_iter_single_seg_count(iter)); 16701c6fdbd8SKent Overstreet goto again; 16711c6fdbd8SKent Overstreet } 16721c6fdbd8SKent Overstreet pos += ret; 16731c6fdbd8SKent Overstreet written += ret; 16741c6fdbd8SKent Overstreet 16751c6fdbd8SKent Overstreet balance_dirty_pages_ratelimited(mapping); 16761c6fdbd8SKent Overstreet } while (iov_iter_count(iter)); 16771c6fdbd8SKent Overstreet 16781c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 16791c6fdbd8SKent Overstreet 16801c6fdbd8SKent Overstreet return written ? written : ret; 16811c6fdbd8SKent Overstreet } 16821c6fdbd8SKent Overstreet 16831c6fdbd8SKent Overstreet /* O_DIRECT reads */ 16841c6fdbd8SKent Overstreet 16851c6fdbd8SKent Overstreet static void bch2_dio_read_complete(struct closure *cl) 16861c6fdbd8SKent Overstreet { 16871c6fdbd8SKent Overstreet struct dio_read *dio = container_of(cl, struct dio_read, cl); 16881c6fdbd8SKent Overstreet 16891c6fdbd8SKent Overstreet dio->req->ki_complete(dio->req, dio->ret); 16901c6fdbd8SKent Overstreet bio_check_pages_dirty(&dio->rbio.bio); /* transfers ownership */ 16911c6fdbd8SKent Overstreet } 16921c6fdbd8SKent Overstreet 16931c6fdbd8SKent Overstreet static void bch2_direct_IO_read_endio(struct bio *bio) 16941c6fdbd8SKent Overstreet { 16951c6fdbd8SKent Overstreet struct dio_read *dio = bio->bi_private; 16961c6fdbd8SKent Overstreet 16971c6fdbd8SKent Overstreet if (bio->bi_status) 16981c6fdbd8SKent Overstreet dio->ret = blk_status_to_errno(bio->bi_status); 16991c6fdbd8SKent Overstreet 17001c6fdbd8SKent Overstreet closure_put(&dio->cl); 17011c6fdbd8SKent Overstreet } 17021c6fdbd8SKent Overstreet 17031c6fdbd8SKent Overstreet static void bch2_direct_IO_read_split_endio(struct bio *bio) 17041c6fdbd8SKent Overstreet { 17051c6fdbd8SKent Overstreet bch2_direct_IO_read_endio(bio); 17061c6fdbd8SKent Overstreet bio_check_pages_dirty(bio); /* transfers ownership */ 17071c6fdbd8SKent Overstreet } 17081c6fdbd8SKent Overstreet 17091c6fdbd8SKent Overstreet static int bch2_direct_IO_read(struct kiocb *req, struct iov_iter *iter) 17101c6fdbd8SKent Overstreet { 17111c6fdbd8SKent Overstreet struct file *file = req->ki_filp; 17121c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 17131c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 17141c6fdbd8SKent Overstreet struct bch_io_opts opts = io_opts(c, inode); 17151c6fdbd8SKent Overstreet struct dio_read *dio; 17161c6fdbd8SKent Overstreet struct bio *bio; 17171c6fdbd8SKent Overstreet loff_t offset = req->ki_pos; 17181c6fdbd8SKent Overstreet bool sync = is_sync_kiocb(req); 17191c6fdbd8SKent Overstreet size_t shorten; 17201c6fdbd8SKent Overstreet ssize_t ret; 17211c6fdbd8SKent Overstreet 17221c6fdbd8SKent Overstreet if ((offset|iter->count) & (block_bytes(c) - 1)) 17231c6fdbd8SKent Overstreet return -EINVAL; 17241c6fdbd8SKent Overstreet 17251c6fdbd8SKent Overstreet ret = min_t(loff_t, iter->count, 17261c6fdbd8SKent Overstreet max_t(loff_t, 0, i_size_read(&inode->v) - offset)); 17271c6fdbd8SKent Overstreet 17281c6fdbd8SKent Overstreet if (!ret) 17291c6fdbd8SKent Overstreet return ret; 17301c6fdbd8SKent Overstreet 17311c6fdbd8SKent Overstreet shorten = iov_iter_count(iter) - round_up(ret, block_bytes(c)); 17321c6fdbd8SKent Overstreet iter->count -= shorten; 17331c6fdbd8SKent Overstreet 17341c6fdbd8SKent Overstreet bio = bio_alloc_bioset(NULL, 17351c6fdbd8SKent Overstreet iov_iter_npages(iter, BIO_MAX_VECS), 17361c6fdbd8SKent Overstreet REQ_OP_READ, 17371c6fdbd8SKent Overstreet GFP_KERNEL, 17381c6fdbd8SKent Overstreet &c->dio_read_bioset); 17391c6fdbd8SKent Overstreet 17401c6fdbd8SKent Overstreet bio->bi_end_io = bch2_direct_IO_read_endio; 17411c6fdbd8SKent Overstreet 17421c6fdbd8SKent Overstreet dio = container_of(bio, struct dio_read, rbio.bio); 17431c6fdbd8SKent Overstreet closure_init(&dio->cl, NULL); 17441c6fdbd8SKent Overstreet 17451c6fdbd8SKent Overstreet /* 17461c6fdbd8SKent Overstreet * this is a _really_ horrible hack just to avoid an atomic sub at the 17471c6fdbd8SKent Overstreet * end: 17481c6fdbd8SKent Overstreet */ 17491c6fdbd8SKent Overstreet if (!sync) { 17501c6fdbd8SKent Overstreet set_closure_fn(&dio->cl, bch2_dio_read_complete, NULL); 17511c6fdbd8SKent Overstreet atomic_set(&dio->cl.remaining, 17521c6fdbd8SKent Overstreet CLOSURE_REMAINING_INITIALIZER - 17531c6fdbd8SKent Overstreet CLOSURE_RUNNING + 17541c6fdbd8SKent Overstreet CLOSURE_DESTRUCTOR); 17551c6fdbd8SKent Overstreet } else { 17561c6fdbd8SKent Overstreet atomic_set(&dio->cl.remaining, 17571c6fdbd8SKent Overstreet CLOSURE_REMAINING_INITIALIZER + 1); 17581c6fdbd8SKent Overstreet } 17591c6fdbd8SKent Overstreet 17601c6fdbd8SKent Overstreet dio->req = req; 17611c6fdbd8SKent Overstreet dio->ret = ret; 17621c6fdbd8SKent Overstreet 17631c6fdbd8SKent Overstreet goto start; 17641c6fdbd8SKent Overstreet while (iter->count) { 17651c6fdbd8SKent Overstreet bio = bio_alloc_bioset(NULL, 17661c6fdbd8SKent Overstreet iov_iter_npages(iter, BIO_MAX_VECS), 17671c6fdbd8SKent Overstreet REQ_OP_READ, 17681c6fdbd8SKent Overstreet GFP_KERNEL, 17691c6fdbd8SKent Overstreet &c->bio_read); 17701c6fdbd8SKent Overstreet bio->bi_end_io = bch2_direct_IO_read_split_endio; 17711c6fdbd8SKent Overstreet start: 17721c6fdbd8SKent Overstreet bio->bi_opf = REQ_OP_READ|REQ_SYNC; 17731c6fdbd8SKent Overstreet bio->bi_iter.bi_sector = offset >> 9; 17741c6fdbd8SKent Overstreet bio->bi_private = dio; 17751c6fdbd8SKent Overstreet 17761c6fdbd8SKent Overstreet ret = bio_iov_iter_get_pages(bio, iter); 17771c6fdbd8SKent Overstreet if (ret < 0) { 17781c6fdbd8SKent Overstreet /* XXX: fault inject this path */ 17791c6fdbd8SKent Overstreet bio->bi_status = BLK_STS_RESOURCE; 17801c6fdbd8SKent Overstreet bio_endio(bio); 17811c6fdbd8SKent Overstreet break; 17821c6fdbd8SKent Overstreet } 17831c6fdbd8SKent Overstreet 17841c6fdbd8SKent Overstreet offset += bio->bi_iter.bi_size; 17851c6fdbd8SKent Overstreet bio_set_pages_dirty(bio); 17861c6fdbd8SKent Overstreet 17871c6fdbd8SKent Overstreet if (iter->count) 17881c6fdbd8SKent Overstreet closure_get(&dio->cl); 17891c6fdbd8SKent Overstreet 17901c6fdbd8SKent Overstreet bch2_read(c, rbio_init(bio, opts), inode->v.i_ino); 17911c6fdbd8SKent Overstreet } 17921c6fdbd8SKent Overstreet 17931c6fdbd8SKent Overstreet iter->count += shorten; 17941c6fdbd8SKent Overstreet 17951c6fdbd8SKent Overstreet if (sync) { 17961c6fdbd8SKent Overstreet closure_sync(&dio->cl); 17971c6fdbd8SKent Overstreet closure_debug_destroy(&dio->cl); 17981c6fdbd8SKent Overstreet ret = dio->ret; 17991c6fdbd8SKent Overstreet bio_check_pages_dirty(&dio->rbio.bio); /* transfers ownership */ 18001c6fdbd8SKent Overstreet return ret; 18011c6fdbd8SKent Overstreet } else { 18021c6fdbd8SKent Overstreet return -EIOCBQUEUED; 18031c6fdbd8SKent Overstreet } 18041c6fdbd8SKent Overstreet } 18051c6fdbd8SKent Overstreet 18061c6fdbd8SKent Overstreet ssize_t bch2_read_iter(struct kiocb *iocb, struct iov_iter *iter) 18071c6fdbd8SKent Overstreet { 18081c6fdbd8SKent Overstreet struct file *file = iocb->ki_filp; 18091c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 18101c6fdbd8SKent Overstreet struct address_space *mapping = file->f_mapping; 18111c6fdbd8SKent Overstreet size_t count = iov_iter_count(iter); 18121c6fdbd8SKent Overstreet ssize_t ret; 18131c6fdbd8SKent Overstreet 18141c6fdbd8SKent Overstreet if (!count) 18151c6fdbd8SKent Overstreet return 0; /* skip atime */ 18161c6fdbd8SKent Overstreet 18171c6fdbd8SKent Overstreet if (iocb->ki_flags & IOCB_DIRECT) { 18181c6fdbd8SKent Overstreet struct blk_plug plug; 18191c6fdbd8SKent Overstreet 18201c6fdbd8SKent Overstreet ret = filemap_write_and_wait_range(mapping, 18211c6fdbd8SKent Overstreet iocb->ki_pos, 18221c6fdbd8SKent Overstreet iocb->ki_pos + count - 1); 18231c6fdbd8SKent Overstreet if (ret < 0) 18241c6fdbd8SKent Overstreet return ret; 18251c6fdbd8SKent Overstreet 18261c6fdbd8SKent Overstreet file_accessed(file); 18271c6fdbd8SKent Overstreet 18281c6fdbd8SKent Overstreet blk_start_plug(&plug); 18291c6fdbd8SKent Overstreet ret = bch2_direct_IO_read(iocb, iter); 18301c6fdbd8SKent Overstreet blk_finish_plug(&plug); 18311c6fdbd8SKent Overstreet 18321c6fdbd8SKent Overstreet if (ret >= 0) 18331c6fdbd8SKent Overstreet iocb->ki_pos += ret; 18341c6fdbd8SKent Overstreet } else { 18351c6fdbd8SKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 18361c6fdbd8SKent Overstreet ret = generic_file_read_iter(iocb, iter); 18371c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 18381c6fdbd8SKent Overstreet } 18391c6fdbd8SKent Overstreet 18401c6fdbd8SKent Overstreet return ret; 18411c6fdbd8SKent Overstreet } 18421c6fdbd8SKent Overstreet 18431c6fdbd8SKent Overstreet /* O_DIRECT writes */ 18441c6fdbd8SKent Overstreet 18451c6fdbd8SKent Overstreet /* 18461c6fdbd8SKent Overstreet * We're going to return -EIOCBQUEUED, but we haven't finished consuming the 18471c6fdbd8SKent Overstreet * iov_iter yet, so we need to stash a copy of the iovec: it might be on the 18481c6fdbd8SKent Overstreet * caller's stack, we're not guaranteed that it will live for the duration of 18491c6fdbd8SKent Overstreet * the IO: 18501c6fdbd8SKent Overstreet */ 18511c6fdbd8SKent Overstreet static noinline int bch2_dio_write_copy_iov(struct dio_write *dio) 18521c6fdbd8SKent Overstreet { 18531c6fdbd8SKent Overstreet struct iovec *iov = dio->inline_vecs; 18541c6fdbd8SKent Overstreet 18551c6fdbd8SKent Overstreet /* 18561c6fdbd8SKent Overstreet * iov_iter has a single embedded iovec - nothing to do: 18571c6fdbd8SKent Overstreet */ 18581c6fdbd8SKent Overstreet if (iter_is_ubuf(&dio->iter)) 18591c6fdbd8SKent Overstreet return 0; 18601c6fdbd8SKent Overstreet 18611c6fdbd8SKent Overstreet /* 18621c6fdbd8SKent Overstreet * We don't currently handle non-iovec iov_iters here - return an error, 18631c6fdbd8SKent Overstreet * and we'll fall back to doing the IO synchronously: 18641c6fdbd8SKent Overstreet */ 18651c6fdbd8SKent Overstreet if (!iter_is_iovec(&dio->iter)) 18661c6fdbd8SKent Overstreet return -1; 18671c6fdbd8SKent Overstreet 18681c6fdbd8SKent Overstreet if (dio->iter.nr_segs > ARRAY_SIZE(dio->inline_vecs)) { 18691c6fdbd8SKent Overstreet iov = kmalloc_array(dio->iter.nr_segs, sizeof(*iov), 18701c6fdbd8SKent Overstreet GFP_KERNEL); 18711c6fdbd8SKent Overstreet if (unlikely(!iov)) 18721c6fdbd8SKent Overstreet return -ENOMEM; 18731c6fdbd8SKent Overstreet 18741c6fdbd8SKent Overstreet dio->free_iov = true; 18751c6fdbd8SKent Overstreet } 18761c6fdbd8SKent Overstreet 18771c6fdbd8SKent Overstreet memcpy(iov, dio->iter.__iov, dio->iter.nr_segs * sizeof(*iov)); 18781c6fdbd8SKent Overstreet dio->iter.__iov = iov; 18791c6fdbd8SKent Overstreet return 0; 18801c6fdbd8SKent Overstreet } 18811c6fdbd8SKent Overstreet 18821c6fdbd8SKent Overstreet static void bch2_dio_write_loop_async(struct closure *); 18831c6fdbd8SKent Overstreet 18841c6fdbd8SKent Overstreet static long bch2_dio_write_loop(struct dio_write *dio) 18851c6fdbd8SKent Overstreet { 18861c6fdbd8SKent Overstreet struct kiocb *req = dio->req; 18871c6fdbd8SKent Overstreet struct address_space *mapping = req->ki_filp->f_mapping; 18881c6fdbd8SKent Overstreet struct bch_inode_info *inode = dio->iop.inode; 18891c6fdbd8SKent Overstreet struct bio *bio = &dio->iop.op.wbio.bio; 18901c6fdbd8SKent Overstreet struct bvec_iter_all iter; 18911c6fdbd8SKent Overstreet struct bio_vec *bv; 18921c6fdbd8SKent Overstreet bool sync; 18931c6fdbd8SKent Overstreet long ret; 18941c6fdbd8SKent Overstreet 18951c6fdbd8SKent Overstreet if (dio->loop) 18961c6fdbd8SKent Overstreet goto loop; 18971c6fdbd8SKent Overstreet 18981c6fdbd8SKent Overstreet inode_dio_begin(&inode->v); 18991c6fdbd8SKent Overstreet bch2_pagecache_block_get(&inode->ei_pagecache_lock); 19001c6fdbd8SKent Overstreet 19011c6fdbd8SKent Overstreet /* Write and invalidate pagecache range that we're writing to: */ 19021c6fdbd8SKent Overstreet ret = write_invalidate_inode_pages_range(mapping, req->ki_pos, 19031c6fdbd8SKent Overstreet req->ki_pos + iov_iter_count(&dio->iter) - 1); 19041c6fdbd8SKent Overstreet if (unlikely(ret)) 19051c6fdbd8SKent Overstreet goto err; 19061c6fdbd8SKent Overstreet 19071c6fdbd8SKent Overstreet while (1) { 19081c6fdbd8SKent Overstreet if (current != dio->task) 19091c6fdbd8SKent Overstreet kthread_use_mm(dio->task->mm); 19101c6fdbd8SKent Overstreet BUG_ON(current->faults_disabled_mapping); 19111c6fdbd8SKent Overstreet current->faults_disabled_mapping = mapping; 19121c6fdbd8SKent Overstreet 19131c6fdbd8SKent Overstreet ret = bio_iov_iter_get_pages(bio, &dio->iter); 19141c6fdbd8SKent Overstreet 19151c6fdbd8SKent Overstreet current->faults_disabled_mapping = NULL; 19161c6fdbd8SKent Overstreet if (current != dio->task) 19171c6fdbd8SKent Overstreet kthread_unuse_mm(dio->task->mm); 19181c6fdbd8SKent Overstreet 19191c6fdbd8SKent Overstreet if (unlikely(ret < 0)) 19201c6fdbd8SKent Overstreet goto err; 19211c6fdbd8SKent Overstreet 19221c6fdbd8SKent Overstreet /* gup might have faulted pages back in: */ 19231c6fdbd8SKent Overstreet ret = write_invalidate_inode_pages_range(mapping, 19241c6fdbd8SKent Overstreet req->ki_pos + (dio->iop.op.written << 9), 19251c6fdbd8SKent Overstreet req->ki_pos + iov_iter_count(&dio->iter) - 1); 19261c6fdbd8SKent Overstreet if (unlikely(ret)) 19271c6fdbd8SKent Overstreet goto err; 19281c6fdbd8SKent Overstreet 19291c6fdbd8SKent Overstreet dio->iop.op.pos = POS(inode->v.i_ino, 19301c6fdbd8SKent Overstreet (req->ki_pos >> 9) + dio->iop.op.written); 19311c6fdbd8SKent Overstreet 19321c6fdbd8SKent Overstreet task_io_account_write(bio->bi_iter.bi_size); 19331c6fdbd8SKent Overstreet 19341c6fdbd8SKent Overstreet closure_call(&dio->iop.op.cl, bch2_write, NULL, &dio->cl); 19351c6fdbd8SKent Overstreet 19361c6fdbd8SKent Overstreet if (!dio->sync && !dio->loop && dio->iter.count) { 19371c6fdbd8SKent Overstreet if (bch2_dio_write_copy_iov(dio)) { 19381c6fdbd8SKent Overstreet dio->iop.op.error = -ENOMEM; 19391c6fdbd8SKent Overstreet goto err_wait_io; 19401c6fdbd8SKent Overstreet } 19411c6fdbd8SKent Overstreet } 19421c6fdbd8SKent Overstreet err_wait_io: 19431c6fdbd8SKent Overstreet dio->loop = true; 19441c6fdbd8SKent Overstreet 19451c6fdbd8SKent Overstreet if (!dio->sync) { 19461c6fdbd8SKent Overstreet continue_at(&dio->cl, bch2_dio_write_loop_async, NULL); 19471c6fdbd8SKent Overstreet return -EIOCBQUEUED; 19481c6fdbd8SKent Overstreet } 19491c6fdbd8SKent Overstreet 19501c6fdbd8SKent Overstreet closure_sync(&dio->cl); 19511c6fdbd8SKent Overstreet loop: 19521c6fdbd8SKent Overstreet bio_for_each_segment_all(bv, bio, iter) 19531c6fdbd8SKent Overstreet put_page(bv->bv_page); 19541c6fdbd8SKent Overstreet if (!dio->iter.count || dio->iop.op.error) 19551c6fdbd8SKent Overstreet break; 19561c6fdbd8SKent Overstreet bio_reset(bio, NULL, REQ_OP_WRITE); 19571c6fdbd8SKent Overstreet } 19581c6fdbd8SKent Overstreet 19591c6fdbd8SKent Overstreet ret = dio->iop.op.error ?: ((long) dio->iop.op.written << 9); 19601c6fdbd8SKent Overstreet err: 19611c6fdbd8SKent Overstreet bch2_pagecache_block_put(&inode->ei_pagecache_lock); 19621c6fdbd8SKent Overstreet bch2_disk_reservation_put(dio->iop.op.c, &dio->iop.op.res); 19631c6fdbd8SKent Overstreet bch2_quota_reservation_put(dio->iop.op.c, inode, &dio->quota_res); 19641c6fdbd8SKent Overstreet 19651c6fdbd8SKent Overstreet if (dio->free_iov) 19661c6fdbd8SKent Overstreet kfree(dio->iter.__iov); 19671c6fdbd8SKent Overstreet 19681c6fdbd8SKent Overstreet closure_debug_destroy(&dio->cl); 19691c6fdbd8SKent Overstreet 19701c6fdbd8SKent Overstreet sync = dio->sync; 19711c6fdbd8SKent Overstreet bio_put(bio); 19721c6fdbd8SKent Overstreet 19731c6fdbd8SKent Overstreet /* inode->i_dio_count is our ref on inode and thus bch_fs */ 19741c6fdbd8SKent Overstreet inode_dio_end(&inode->v); 19751c6fdbd8SKent Overstreet 19761c6fdbd8SKent Overstreet if (!sync) { 19771c6fdbd8SKent Overstreet req->ki_complete(req, ret); 19781c6fdbd8SKent Overstreet ret = -EIOCBQUEUED; 19791c6fdbd8SKent Overstreet } 19801c6fdbd8SKent Overstreet return ret; 19811c6fdbd8SKent Overstreet } 19821c6fdbd8SKent Overstreet 19831c6fdbd8SKent Overstreet static void bch2_dio_write_loop_async(struct closure *cl) 19841c6fdbd8SKent Overstreet { 19851c6fdbd8SKent Overstreet struct dio_write *dio = container_of(cl, struct dio_write, cl); 19861c6fdbd8SKent Overstreet 19871c6fdbd8SKent Overstreet bch2_dio_write_loop(dio); 19881c6fdbd8SKent Overstreet } 19891c6fdbd8SKent Overstreet 19901c6fdbd8SKent Overstreet static noinline 19911c6fdbd8SKent Overstreet ssize_t bch2_direct_write(struct kiocb *req, struct iov_iter *iter) 19921c6fdbd8SKent Overstreet { 19931c6fdbd8SKent Overstreet struct file *file = req->ki_filp; 19941c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 19951c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 19961c6fdbd8SKent Overstreet struct dio_write *dio; 19971c6fdbd8SKent Overstreet struct bio *bio; 19981c6fdbd8SKent Overstreet loff_t offset = req->ki_pos; 19991c6fdbd8SKent Overstreet ssize_t ret; 20001c6fdbd8SKent Overstreet 20011c6fdbd8SKent Overstreet lockdep_assert_held(&inode->v.i_rwsem); 20021c6fdbd8SKent Overstreet 20031c6fdbd8SKent Overstreet if (unlikely(!iter->count)) 20041c6fdbd8SKent Overstreet return 0; 20051c6fdbd8SKent Overstreet 20061c6fdbd8SKent Overstreet if (unlikely((offset|iter->count) & (block_bytes(c) - 1))) 20071c6fdbd8SKent Overstreet return -EINVAL; 20081c6fdbd8SKent Overstreet 20091c6fdbd8SKent Overstreet bio = bio_alloc_bioset(NULL, 20101c6fdbd8SKent Overstreet iov_iter_npages(iter, BIO_MAX_VECS), 20111c6fdbd8SKent Overstreet REQ_OP_WRITE, 20121c6fdbd8SKent Overstreet GFP_KERNEL, 20131c6fdbd8SKent Overstreet &c->dio_write_bioset); 20141c6fdbd8SKent Overstreet dio = container_of(bio, struct dio_write, iop.op.wbio.bio); 20151c6fdbd8SKent Overstreet closure_init(&dio->cl, NULL); 20161c6fdbd8SKent Overstreet dio->req = req; 20171c6fdbd8SKent Overstreet dio->task = current; 20181c6fdbd8SKent Overstreet dio->loop = false; 20191c6fdbd8SKent Overstreet dio->sync = is_sync_kiocb(req) || 20201c6fdbd8SKent Overstreet offset + iter->count > inode->v.i_size; 20211c6fdbd8SKent Overstreet dio->free_iov = false; 20221c6fdbd8SKent Overstreet dio->quota_res.sectors = 0; 20231c6fdbd8SKent Overstreet dio->iter = *iter; 20241c6fdbd8SKent Overstreet bch2_fswrite_op_init(&dio->iop, c, inode, io_opts(c, inode), true); 20251c6fdbd8SKent Overstreet dio->iop.op.write_point = writepoint_hashed((unsigned long) dio->task); 20261c6fdbd8SKent Overstreet dio->iop.op.flags |= BCH_WRITE_NOPUT_RESERVATION; 20271c6fdbd8SKent Overstreet 20281c6fdbd8SKent Overstreet if ((req->ki_flags & IOCB_DSYNC) && 20291c6fdbd8SKent Overstreet !c->opts.journal_flush_disabled) 20301c6fdbd8SKent Overstreet dio->iop.op.flags |= BCH_WRITE_FLUSH; 20311c6fdbd8SKent Overstreet 20321c6fdbd8SKent Overstreet ret = bch2_quota_reservation_add(c, inode, &dio->quota_res, 20331c6fdbd8SKent Overstreet iter->count >> 9, true); 20341c6fdbd8SKent Overstreet if (unlikely(ret)) 20351c6fdbd8SKent Overstreet goto err; 20361c6fdbd8SKent Overstreet 20371c6fdbd8SKent Overstreet ret = bch2_disk_reservation_get(c, &dio->iop.op.res, iter->count >> 9, 20381c6fdbd8SKent Overstreet dio->iop.op.opts.data_replicas, 0); 20391c6fdbd8SKent Overstreet if (unlikely(ret)) { 20401c6fdbd8SKent Overstreet if (bch2_check_range_allocated(c, POS(inode->v.i_ino, 20411c6fdbd8SKent Overstreet offset >> 9), 20421c6fdbd8SKent Overstreet iter->count >> 9)) 20431c6fdbd8SKent Overstreet goto err; 20441c6fdbd8SKent Overstreet 20451c6fdbd8SKent Overstreet dio->iop.unalloc = true; 20461c6fdbd8SKent Overstreet } 20471c6fdbd8SKent Overstreet 20481c6fdbd8SKent Overstreet dio->iop.op.nr_replicas = dio->iop.op.res.nr_replicas; 20491c6fdbd8SKent Overstreet 20501c6fdbd8SKent Overstreet return bch2_dio_write_loop(dio); 20511c6fdbd8SKent Overstreet err: 20521c6fdbd8SKent Overstreet bch2_disk_reservation_put(c, &dio->iop.op.res); 20531c6fdbd8SKent Overstreet bch2_quota_reservation_put(c, inode, &dio->quota_res); 20541c6fdbd8SKent Overstreet closure_debug_destroy(&dio->cl); 20551c6fdbd8SKent Overstreet bio_put(bio); 20561c6fdbd8SKent Overstreet return ret; 20571c6fdbd8SKent Overstreet } 20581c6fdbd8SKent Overstreet 20591c6fdbd8SKent Overstreet static ssize_t __bch2_write_iter(struct kiocb *iocb, struct iov_iter *from) 20601c6fdbd8SKent Overstreet { 20611c6fdbd8SKent Overstreet struct file *file = iocb->ki_filp; 20621c6fdbd8SKent Overstreet ssize_t ret; 20631c6fdbd8SKent Overstreet 20641c6fdbd8SKent Overstreet if (iocb->ki_flags & IOCB_DIRECT) 20651c6fdbd8SKent Overstreet return bch2_direct_write(iocb, from); 20661c6fdbd8SKent Overstreet 20671c6fdbd8SKent Overstreet ret = file_remove_privs(file); 20681c6fdbd8SKent Overstreet if (ret) 20691c6fdbd8SKent Overstreet return ret; 20701c6fdbd8SKent Overstreet 20711c6fdbd8SKent Overstreet ret = file_update_time(file); 20721c6fdbd8SKent Overstreet if (ret) 20731c6fdbd8SKent Overstreet return ret; 20741c6fdbd8SKent Overstreet 20751c6fdbd8SKent Overstreet ret = iocb->ki_flags & IOCB_DIRECT 20761c6fdbd8SKent Overstreet ? bch2_direct_write(iocb, from) 20771c6fdbd8SKent Overstreet : bch2_buffered_write(iocb, from); 20781c6fdbd8SKent Overstreet 20791c6fdbd8SKent Overstreet if (likely(ret > 0)) 20801c6fdbd8SKent Overstreet iocb->ki_pos += ret; 20811c6fdbd8SKent Overstreet 20821c6fdbd8SKent Overstreet return ret; 20831c6fdbd8SKent Overstreet } 20841c6fdbd8SKent Overstreet 20851c6fdbd8SKent Overstreet ssize_t bch2_write_iter(struct kiocb *iocb, struct iov_iter *from) 20861c6fdbd8SKent Overstreet { 20871c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(iocb->ki_filp); 20881c6fdbd8SKent Overstreet bool direct = iocb->ki_flags & IOCB_DIRECT; 20891c6fdbd8SKent Overstreet ssize_t ret; 20901c6fdbd8SKent Overstreet 20911c6fdbd8SKent Overstreet inode_lock(&inode->v); 20921c6fdbd8SKent Overstreet ret = generic_write_checks(iocb, from); 20931c6fdbd8SKent Overstreet if (ret > 0) 20941c6fdbd8SKent Overstreet ret = __bch2_write_iter(iocb, from); 20951c6fdbd8SKent Overstreet inode_unlock(&inode->v); 20961c6fdbd8SKent Overstreet 20971c6fdbd8SKent Overstreet if (ret > 0 && !direct) 20981c6fdbd8SKent Overstreet ret = generic_write_sync(iocb, ret); 20991c6fdbd8SKent Overstreet 21001c6fdbd8SKent Overstreet return ret; 21011c6fdbd8SKent Overstreet } 21021c6fdbd8SKent Overstreet 21031c6fdbd8SKent Overstreet /* fsync: */ 21041c6fdbd8SKent Overstreet 21051c6fdbd8SKent Overstreet int bch2_fsync(struct file *file, loff_t start, loff_t end, int datasync) 21061c6fdbd8SKent Overstreet { 21071c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 21081c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 21091c6fdbd8SKent Overstreet int ret; 21101c6fdbd8SKent Overstreet 21111c6fdbd8SKent Overstreet ret = file_write_and_wait_range(file, start, end); 21121c6fdbd8SKent Overstreet if (ret) 21131c6fdbd8SKent Overstreet return ret; 21141c6fdbd8SKent Overstreet 21151c6fdbd8SKent Overstreet if (datasync && !(inode->v.i_state & I_DIRTY_DATASYNC)) 21161c6fdbd8SKent Overstreet goto out; 21171c6fdbd8SKent Overstreet 21181c6fdbd8SKent Overstreet ret = sync_inode_metadata(&inode->v, 1); 21191c6fdbd8SKent Overstreet if (ret) 21201c6fdbd8SKent Overstreet return ret; 21211c6fdbd8SKent Overstreet out: 21221c6fdbd8SKent Overstreet if (c->opts.journal_flush_disabled) 21231c6fdbd8SKent Overstreet return 0; 21241c6fdbd8SKent Overstreet 21251c6fdbd8SKent Overstreet return bch2_journal_flush_seq(&c->journal, inode->ei_journal_seq); 21261c6fdbd8SKent Overstreet } 21271c6fdbd8SKent Overstreet 21281c6fdbd8SKent Overstreet /* truncate: */ 21291c6fdbd8SKent Overstreet 21301c6fdbd8SKent Overstreet static inline int range_has_data(struct bch_fs *c, 21311c6fdbd8SKent Overstreet struct bpos start, 21321c6fdbd8SKent Overstreet struct bpos end) 21331c6fdbd8SKent Overstreet { 21341c6fdbd8SKent Overstreet 21351c6fdbd8SKent Overstreet struct btree_iter iter; 21361c6fdbd8SKent Overstreet struct bkey_s_c k; 21371c6fdbd8SKent Overstreet int ret = 0; 21381c6fdbd8SKent Overstreet 21391c6fdbd8SKent Overstreet for_each_btree_key(&iter, c, BTREE_ID_EXTENTS, 21401c6fdbd8SKent Overstreet start, 0, k) { 21411c6fdbd8SKent Overstreet if (bkey_cmp(bkey_start_pos(k.k), end) >= 0) 21421c6fdbd8SKent Overstreet break; 21431c6fdbd8SKent Overstreet 21441c6fdbd8SKent Overstreet if (bkey_extent_is_data(k.k)) { 21451c6fdbd8SKent Overstreet ret = 1; 21461c6fdbd8SKent Overstreet break; 21471c6fdbd8SKent Overstreet } 21481c6fdbd8SKent Overstreet } 21491c6fdbd8SKent Overstreet 21501c6fdbd8SKent Overstreet return bch2_btree_iter_unlock(&iter) ?: ret; 21511c6fdbd8SKent Overstreet } 21521c6fdbd8SKent Overstreet 21531c6fdbd8SKent Overstreet static int __bch2_truncate_page(struct bch_inode_info *inode, 21541c6fdbd8SKent Overstreet pgoff_t index, loff_t start, loff_t end) 21551c6fdbd8SKent Overstreet { 21561c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 21571c6fdbd8SKent Overstreet struct address_space *mapping = inode->v.i_mapping; 21581c6fdbd8SKent Overstreet unsigned start_offset = start & (PAGE_SIZE - 1); 21591c6fdbd8SKent Overstreet unsigned end_offset = ((end - 1) & (PAGE_SIZE - 1)) + 1; 21601c6fdbd8SKent Overstreet struct page *page; 21611c6fdbd8SKent Overstreet int ret = 0; 21621c6fdbd8SKent Overstreet 21631c6fdbd8SKent Overstreet /* Page boundary? Nothing to do */ 21641c6fdbd8SKent Overstreet if (!((index == start >> PAGE_SHIFT && start_offset) || 21651c6fdbd8SKent Overstreet (index == end >> PAGE_SHIFT && end_offset != PAGE_SIZE))) 21661c6fdbd8SKent Overstreet return 0; 21671c6fdbd8SKent Overstreet 21681c6fdbd8SKent Overstreet /* Above i_size? */ 21691c6fdbd8SKent Overstreet if (index << PAGE_SHIFT >= inode->v.i_size) 21701c6fdbd8SKent Overstreet return 0; 21711c6fdbd8SKent Overstreet 21721c6fdbd8SKent Overstreet page = find_lock_page(mapping, index); 21731c6fdbd8SKent Overstreet if (!page) { 21741c6fdbd8SKent Overstreet /* 21751c6fdbd8SKent Overstreet * XXX: we're doing two index lookups when we end up reading the 21761c6fdbd8SKent Overstreet * page 21771c6fdbd8SKent Overstreet */ 21781c6fdbd8SKent Overstreet ret = range_has_data(c, 21791c6fdbd8SKent Overstreet POS(inode->v.i_ino, index << PAGE_SECTOR_SHIFT), 21801c6fdbd8SKent Overstreet POS(inode->v.i_ino, (index + 1) << PAGE_SECTOR_SHIFT)); 21811c6fdbd8SKent Overstreet if (ret <= 0) 21821c6fdbd8SKent Overstreet return ret; 21831c6fdbd8SKent Overstreet 21841c6fdbd8SKent Overstreet page = find_or_create_page(mapping, index, GFP_KERNEL); 21851c6fdbd8SKent Overstreet if (unlikely(!page)) { 21861c6fdbd8SKent Overstreet ret = -ENOMEM; 21871c6fdbd8SKent Overstreet goto out; 21881c6fdbd8SKent Overstreet } 21891c6fdbd8SKent Overstreet } 21901c6fdbd8SKent Overstreet 21911c6fdbd8SKent Overstreet if (!PageUptodate(page)) { 21921c6fdbd8SKent Overstreet ret = bch2_read_single_page(page, mapping); 21931c6fdbd8SKent Overstreet if (ret) 21941c6fdbd8SKent Overstreet goto unlock; 21951c6fdbd8SKent Overstreet } 21961c6fdbd8SKent Overstreet 21971c6fdbd8SKent Overstreet /* 21981c6fdbd8SKent Overstreet * Bit of a hack - we don't want truncate to fail due to -ENOSPC. 21991c6fdbd8SKent Overstreet * 22001c6fdbd8SKent Overstreet * XXX: because we aren't currently tracking whether the page has actual 22011c6fdbd8SKent Overstreet * data in it (vs. just 0s, or only partially written) this wrong. ick. 22021c6fdbd8SKent Overstreet */ 22031c6fdbd8SKent Overstreet ret = bch2_get_page_reservation(c, inode, page, false); 22041c6fdbd8SKent Overstreet BUG_ON(ret); 22051c6fdbd8SKent Overstreet 22061c6fdbd8SKent Overstreet if (index == start >> PAGE_SHIFT && 22071c6fdbd8SKent Overstreet index == end >> PAGE_SHIFT) 22081c6fdbd8SKent Overstreet zero_user_segment(page, start_offset, end_offset); 22091c6fdbd8SKent Overstreet else if (index == start >> PAGE_SHIFT) 22101c6fdbd8SKent Overstreet zero_user_segment(page, start_offset, PAGE_SIZE); 22111c6fdbd8SKent Overstreet else if (index == end >> PAGE_SHIFT) 22121c6fdbd8SKent Overstreet zero_user_segment(page, 0, end_offset); 22131c6fdbd8SKent Overstreet 22141c6fdbd8SKent Overstreet if (!PageDirty(page)) 22151c6fdbd8SKent Overstreet set_page_dirty(page); 22161c6fdbd8SKent Overstreet unlock: 22171c6fdbd8SKent Overstreet unlock_page(page); 22181c6fdbd8SKent Overstreet put_page(page); 22191c6fdbd8SKent Overstreet out: 22201c6fdbd8SKent Overstreet return ret; 22211c6fdbd8SKent Overstreet } 22221c6fdbd8SKent Overstreet 22231c6fdbd8SKent Overstreet static int bch2_truncate_page(struct bch_inode_info *inode, loff_t from) 22241c6fdbd8SKent Overstreet { 22251c6fdbd8SKent Overstreet return __bch2_truncate_page(inode, from >> PAGE_SHIFT, 22261c6fdbd8SKent Overstreet from, from + PAGE_SIZE); 22271c6fdbd8SKent Overstreet } 22281c6fdbd8SKent Overstreet 22291c6fdbd8SKent Overstreet static int bch2_extend(struct bch_inode_info *inode, struct iattr *iattr) 22301c6fdbd8SKent Overstreet { 22311c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 22321c6fdbd8SKent Overstreet struct address_space *mapping = inode->v.i_mapping; 22331c6fdbd8SKent Overstreet int ret; 22341c6fdbd8SKent Overstreet 22351c6fdbd8SKent Overstreet ret = filemap_write_and_wait_range(mapping, 22361c6fdbd8SKent Overstreet inode->ei_inode.bi_size, S64_MAX); 22371c6fdbd8SKent Overstreet if (ret) 22381c6fdbd8SKent Overstreet return ret; 22391c6fdbd8SKent Overstreet 22401c6fdbd8SKent Overstreet truncate_setsize(&inode->v, iattr->ia_size); 22411c6fdbd8SKent Overstreet /* ATTR_MODE will never be set here, ns argument isn't needed: */ 22421c6fdbd8SKent Overstreet setattr_copy(NULL, &inode->v, iattr); 22431c6fdbd8SKent Overstreet 22441c6fdbd8SKent Overstreet mutex_lock(&inode->ei_update_lock); 2245*2ea90048SKent Overstreet ret = bch2_write_inode_size(c, inode, inode->v.i_size, 2246*2ea90048SKent Overstreet ATTR_MTIME|ATTR_CTIME); 22471c6fdbd8SKent Overstreet mutex_unlock(&inode->ei_update_lock); 22481c6fdbd8SKent Overstreet 22491c6fdbd8SKent Overstreet return ret; 22501c6fdbd8SKent Overstreet } 22511c6fdbd8SKent Overstreet 22521c6fdbd8SKent Overstreet int bch2_truncate(struct bch_inode_info *inode, struct iattr *iattr) 22531c6fdbd8SKent Overstreet { 22541c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 22551c6fdbd8SKent Overstreet struct address_space *mapping = inode->v.i_mapping; 22561c6fdbd8SKent Overstreet struct i_sectors_hook i_sectors_hook = 22571c6fdbd8SKent Overstreet i_sectors_hook_init(inode, BCH_INODE_I_SIZE_DIRTY); 22581c6fdbd8SKent Overstreet bool shrink; 22591c6fdbd8SKent Overstreet int ret = 0; 22601c6fdbd8SKent Overstreet 22611c6fdbd8SKent Overstreet inode_dio_wait(&inode->v); 22621c6fdbd8SKent Overstreet bch2_pagecache_block_get(&inode->ei_pagecache_lock); 22631c6fdbd8SKent Overstreet 22641c6fdbd8SKent Overstreet BUG_ON(inode->v.i_size < inode->ei_inode.bi_size); 22651c6fdbd8SKent Overstreet 22661c6fdbd8SKent Overstreet shrink = iattr->ia_size <= inode->v.i_size; 22671c6fdbd8SKent Overstreet 22681c6fdbd8SKent Overstreet if (!shrink) { 22691c6fdbd8SKent Overstreet ret = bch2_extend(inode, iattr); 22701c6fdbd8SKent Overstreet goto err_put_pagecache; 22711c6fdbd8SKent Overstreet } 22721c6fdbd8SKent Overstreet 22731c6fdbd8SKent Overstreet ret = bch2_truncate_page(inode, iattr->ia_size); 22741c6fdbd8SKent Overstreet if (unlikely(ret)) 22751c6fdbd8SKent Overstreet goto err_put_pagecache; 22761c6fdbd8SKent Overstreet 22771c6fdbd8SKent Overstreet if (iattr->ia_size > inode->ei_inode.bi_size) 22781c6fdbd8SKent Overstreet ret = filemap_write_and_wait_range(mapping, 22791c6fdbd8SKent Overstreet inode->ei_inode.bi_size, 22801c6fdbd8SKent Overstreet iattr->ia_size - 1); 22811c6fdbd8SKent Overstreet else if (iattr->ia_size & (PAGE_SIZE - 1)) 22821c6fdbd8SKent Overstreet ret = filemap_write_and_wait_range(mapping, 22831c6fdbd8SKent Overstreet round_down(iattr->ia_size, PAGE_SIZE), 22841c6fdbd8SKent Overstreet iattr->ia_size - 1); 22851c6fdbd8SKent Overstreet if (ret) 22861c6fdbd8SKent Overstreet goto err_put_pagecache; 22871c6fdbd8SKent Overstreet 22881c6fdbd8SKent Overstreet i_sectors_hook.new_i_size = iattr->ia_size; 22891c6fdbd8SKent Overstreet 22901c6fdbd8SKent Overstreet ret = i_sectors_dirty_start(c, &i_sectors_hook); 22911c6fdbd8SKent Overstreet if (unlikely(ret)) 22921c6fdbd8SKent Overstreet goto err_put_pagecache; 22931c6fdbd8SKent Overstreet 22941c6fdbd8SKent Overstreet truncate_setsize(&inode->v, iattr->ia_size); 22951c6fdbd8SKent Overstreet 22961c6fdbd8SKent Overstreet ret = bch2_inode_truncate(c, inode->v.i_ino, 22971c6fdbd8SKent Overstreet round_up(iattr->ia_size, PAGE_SIZE) >> 9, 22981c6fdbd8SKent Overstreet &i_sectors_hook.hook, 22991c6fdbd8SKent Overstreet &inode->ei_journal_seq); 23001c6fdbd8SKent Overstreet if (unlikely(ret)) 23011c6fdbd8SKent Overstreet goto err_put_sectors_dirty; 23021c6fdbd8SKent Overstreet 23031c6fdbd8SKent Overstreet /* ATTR_MODE will never be set here, ns argument isn't needed: */ 23041c6fdbd8SKent Overstreet setattr_copy(NULL, &inode->v, iattr); 23051c6fdbd8SKent Overstreet out: 23061c6fdbd8SKent Overstreet ret = i_sectors_dirty_finish(c, &i_sectors_hook) ?: ret; 23071c6fdbd8SKent Overstreet err_put_pagecache: 23081c6fdbd8SKent Overstreet bch2_pagecache_block_put(&inode->ei_pagecache_lock); 23091c6fdbd8SKent Overstreet return ret; 23101c6fdbd8SKent Overstreet err_put_sectors_dirty: 23111c6fdbd8SKent Overstreet /* 23121c6fdbd8SKent Overstreet * On error - in particular, bch2_truncate_page() error - don't clear 23131c6fdbd8SKent Overstreet * I_SIZE_DIRTY, as we've left data above i_size!: 23141c6fdbd8SKent Overstreet */ 23151c6fdbd8SKent Overstreet i_sectors_hook.flags &= ~BCH_INODE_I_SIZE_DIRTY; 23161c6fdbd8SKent Overstreet goto out; 23171c6fdbd8SKent Overstreet } 23181c6fdbd8SKent Overstreet 23191c6fdbd8SKent Overstreet /* fallocate: */ 23201c6fdbd8SKent Overstreet 23211c6fdbd8SKent Overstreet static long bch2_fpunch(struct bch_inode_info *inode, loff_t offset, loff_t len) 23221c6fdbd8SKent Overstreet { 23231c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 23241c6fdbd8SKent Overstreet u64 ino = inode->v.i_ino; 23251c6fdbd8SKent Overstreet u64 discard_start = round_up(offset, PAGE_SIZE) >> 9; 23261c6fdbd8SKent Overstreet u64 discard_end = round_down(offset + len, PAGE_SIZE) >> 9; 23271c6fdbd8SKent Overstreet int ret = 0; 23281c6fdbd8SKent Overstreet 23291c6fdbd8SKent Overstreet inode_lock(&inode->v); 23301c6fdbd8SKent Overstreet inode_dio_wait(&inode->v); 23311c6fdbd8SKent Overstreet bch2_pagecache_block_get(&inode->ei_pagecache_lock); 23321c6fdbd8SKent Overstreet 23331c6fdbd8SKent Overstreet ret = __bch2_truncate_page(inode, 23341c6fdbd8SKent Overstreet offset >> PAGE_SHIFT, 23351c6fdbd8SKent Overstreet offset, offset + len); 23361c6fdbd8SKent Overstreet if (unlikely(ret)) 23371c6fdbd8SKent Overstreet goto err; 23381c6fdbd8SKent Overstreet 23391c6fdbd8SKent Overstreet if (offset >> PAGE_SHIFT != 23401c6fdbd8SKent Overstreet (offset + len) >> PAGE_SHIFT) { 23411c6fdbd8SKent Overstreet ret = __bch2_truncate_page(inode, 23421c6fdbd8SKent Overstreet (offset + len) >> PAGE_SHIFT, 23431c6fdbd8SKent Overstreet offset, offset + len); 23441c6fdbd8SKent Overstreet if (unlikely(ret)) 23451c6fdbd8SKent Overstreet goto err; 23461c6fdbd8SKent Overstreet } 23471c6fdbd8SKent Overstreet 23481c6fdbd8SKent Overstreet truncate_pagecache_range(&inode->v, offset, offset + len - 1); 23491c6fdbd8SKent Overstreet 23501c6fdbd8SKent Overstreet if (discard_start < discard_end) { 23511c6fdbd8SKent Overstreet /* 23521c6fdbd8SKent Overstreet * We need to pass in a disk reservation here because we might 23531c6fdbd8SKent Overstreet * be splitting a compressed extent into two. This isn't a 23541c6fdbd8SKent Overstreet * problem with truncate because truncate will never split an 23551c6fdbd8SKent Overstreet * extent, only truncate it... 23561c6fdbd8SKent Overstreet */ 23571c6fdbd8SKent Overstreet struct disk_reservation disk_res = 23581c6fdbd8SKent Overstreet bch2_disk_reservation_init(c, 0); 23591c6fdbd8SKent Overstreet struct i_sectors_hook i_sectors_hook = 23601c6fdbd8SKent Overstreet i_sectors_hook_init(inode, 0); 23611c6fdbd8SKent Overstreet int ret; 23621c6fdbd8SKent Overstreet 23631c6fdbd8SKent Overstreet ret = i_sectors_dirty_start(c, &i_sectors_hook); 23641c6fdbd8SKent Overstreet if (unlikely(ret)) 23651c6fdbd8SKent Overstreet goto err; 23661c6fdbd8SKent Overstreet 23671c6fdbd8SKent Overstreet ret = bch2_btree_delete_range(c, 23681c6fdbd8SKent Overstreet BTREE_ID_EXTENTS, 23691c6fdbd8SKent Overstreet POS(ino, discard_start), 23701c6fdbd8SKent Overstreet POS(ino, discard_end), 23711c6fdbd8SKent Overstreet ZERO_VERSION, 23721c6fdbd8SKent Overstreet &disk_res, 23731c6fdbd8SKent Overstreet &i_sectors_hook.hook, 23741c6fdbd8SKent Overstreet &inode->ei_journal_seq); 23751c6fdbd8SKent Overstreet 23761c6fdbd8SKent Overstreet ret = i_sectors_dirty_finish(c, &i_sectors_hook) ?: ret; 23771c6fdbd8SKent Overstreet } 23781c6fdbd8SKent Overstreet err: 23791c6fdbd8SKent Overstreet bch2_pagecache_block_put(&inode->ei_pagecache_lock); 23801c6fdbd8SKent Overstreet inode_unlock(&inode->v); 23811c6fdbd8SKent Overstreet 23821c6fdbd8SKent Overstreet return ret; 23831c6fdbd8SKent Overstreet } 23841c6fdbd8SKent Overstreet 23851c6fdbd8SKent Overstreet static long bch2_fcollapse(struct bch_inode_info *inode, 23861c6fdbd8SKent Overstreet loff_t offset, loff_t len) 23871c6fdbd8SKent Overstreet { 23881c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 23891c6fdbd8SKent Overstreet struct address_space *mapping = inode->v.i_mapping; 2390d69f41d6SKent Overstreet struct btree_trans trans; 2391d69f41d6SKent Overstreet struct btree_iter *src, *dst; 23921c6fdbd8SKent Overstreet BKEY_PADDED(k) copy; 23931c6fdbd8SKent Overstreet struct bkey_s_c k; 23941c6fdbd8SKent Overstreet struct i_sectors_hook i_sectors_hook = i_sectors_hook_init(inode, 0); 23951c6fdbd8SKent Overstreet loff_t new_size; 23961c6fdbd8SKent Overstreet int ret; 23971c6fdbd8SKent Overstreet 23981c6fdbd8SKent Overstreet if ((offset | len) & (block_bytes(c) - 1)) 23991c6fdbd8SKent Overstreet return -EINVAL; 24001c6fdbd8SKent Overstreet 2401d69f41d6SKent Overstreet bch2_trans_init(&trans, c); 2402d69f41d6SKent Overstreet 2403d69f41d6SKent Overstreet dst = bch2_trans_get_iter(&trans, BTREE_ID_EXTENTS, 24041c6fdbd8SKent Overstreet POS(inode->v.i_ino, offset >> 9), 24051c6fdbd8SKent Overstreet BTREE_ITER_SLOTS|BTREE_ITER_INTENT); 2406d69f41d6SKent Overstreet BUG_ON(IS_ERR(dst)); 2407d69f41d6SKent Overstreet 24081c6fdbd8SKent Overstreet /* position will be set from dst iter's position: */ 2409d69f41d6SKent Overstreet src = bch2_trans_get_iter(&trans, BTREE_ID_EXTENTS, POS_MIN, 24101c6fdbd8SKent Overstreet BTREE_ITER_SLOTS); 2411d69f41d6SKent Overstreet BUG_ON(IS_ERR(src)); 24121c6fdbd8SKent Overstreet 24131c6fdbd8SKent Overstreet /* 24141c6fdbd8SKent Overstreet * We need i_mutex to keep the page cache consistent with the extents 24151c6fdbd8SKent Overstreet * btree, and the btree consistent with i_size - we don't need outside 24161c6fdbd8SKent Overstreet * locking for the extents btree itself, because we're using linked 24171c6fdbd8SKent Overstreet * iterators 24181c6fdbd8SKent Overstreet */ 24191c6fdbd8SKent Overstreet inode_lock(&inode->v); 24201c6fdbd8SKent Overstreet inode_dio_wait(&inode->v); 24211c6fdbd8SKent Overstreet bch2_pagecache_block_get(&inode->ei_pagecache_lock); 24221c6fdbd8SKent Overstreet 24231c6fdbd8SKent Overstreet ret = -EINVAL; 24241c6fdbd8SKent Overstreet if (offset + len >= inode->v.i_size) 24251c6fdbd8SKent Overstreet goto err; 24261c6fdbd8SKent Overstreet 24271c6fdbd8SKent Overstreet if (inode->v.i_size < len) 24281c6fdbd8SKent Overstreet goto err; 24291c6fdbd8SKent Overstreet 24301c6fdbd8SKent Overstreet new_size = inode->v.i_size - len; 24311c6fdbd8SKent Overstreet 24321c6fdbd8SKent Overstreet ret = write_invalidate_inode_pages_range(mapping, offset, LLONG_MAX); 24331c6fdbd8SKent Overstreet if (ret) 24341c6fdbd8SKent Overstreet goto err; 24351c6fdbd8SKent Overstreet 24361c6fdbd8SKent Overstreet ret = i_sectors_dirty_start(c, &i_sectors_hook); 24371c6fdbd8SKent Overstreet if (ret) 24381c6fdbd8SKent Overstreet goto err; 24391c6fdbd8SKent Overstreet 2440d69f41d6SKent Overstreet while (bkey_cmp(dst->pos, 24411c6fdbd8SKent Overstreet POS(inode->v.i_ino, 24421c6fdbd8SKent Overstreet round_up(new_size, PAGE_SIZE) >> 9)) < 0) { 24431c6fdbd8SKent Overstreet struct disk_reservation disk_res; 24441c6fdbd8SKent Overstreet 2445d69f41d6SKent Overstreet bch2_btree_iter_set_pos(src, 2446d69f41d6SKent Overstreet POS(dst->pos.inode, dst->pos.offset + (len >> 9))); 24471c6fdbd8SKent Overstreet 2448d69f41d6SKent Overstreet k = bch2_btree_iter_peek_slot(src); 24491c6fdbd8SKent Overstreet if ((ret = btree_iter_err(k))) 24501c6fdbd8SKent Overstreet goto btree_iter_err; 24511c6fdbd8SKent Overstreet 24521c6fdbd8SKent Overstreet bkey_reassemble(©.k, k); 24531c6fdbd8SKent Overstreet 2454d69f41d6SKent Overstreet bch2_cut_front(src->pos, ©.k); 24551c6fdbd8SKent Overstreet copy.k.k.p.offset -= len >> 9; 24561c6fdbd8SKent Overstreet 2457d69f41d6SKent Overstreet BUG_ON(bkey_cmp(dst->pos, bkey_start_pos(©.k.k))); 24581c6fdbd8SKent Overstreet 24591c6fdbd8SKent Overstreet ret = bch2_disk_reservation_get(c, &disk_res, copy.k.k.size, 24601c6fdbd8SKent Overstreet bch2_extent_nr_dirty_ptrs(bkey_i_to_s_c(©.k)), 24611c6fdbd8SKent Overstreet BCH_DISK_RESERVATION_NOFAIL); 24621c6fdbd8SKent Overstreet BUG_ON(ret); 24631c6fdbd8SKent Overstreet 24641c6fdbd8SKent Overstreet ret = bch2_btree_insert_at(c, &disk_res, &i_sectors_hook.hook, 24651c6fdbd8SKent Overstreet &inode->ei_journal_seq, 24661c6fdbd8SKent Overstreet BTREE_INSERT_ATOMIC| 24671c6fdbd8SKent Overstreet BTREE_INSERT_NOFAIL, 2468d69f41d6SKent Overstreet BTREE_INSERT_ENTRY(dst, ©.k)); 24691c6fdbd8SKent Overstreet bch2_disk_reservation_put(c, &disk_res); 24701c6fdbd8SKent Overstreet btree_iter_err: 24711c6fdbd8SKent Overstreet if (ret == -EINTR) 24721c6fdbd8SKent Overstreet ret = 0; 24731c6fdbd8SKent Overstreet if (ret) { 2474d69f41d6SKent Overstreet bch2_trans_exit(&trans); 24751c6fdbd8SKent Overstreet goto err_put_sectors_dirty; 24761c6fdbd8SKent Overstreet } 24771c6fdbd8SKent Overstreet /* 24781c6fdbd8SKent Overstreet * XXX: if we error here we've left data with multiple 24791c6fdbd8SKent Overstreet * pointers... which isn't a _super_ serious problem... 24801c6fdbd8SKent Overstreet */ 24811c6fdbd8SKent Overstreet 2482d69f41d6SKent Overstreet bch2_btree_iter_cond_resched(src); 24831c6fdbd8SKent Overstreet } 24841c6fdbd8SKent Overstreet 2485d69f41d6SKent Overstreet bch2_trans_exit(&trans); 24861c6fdbd8SKent Overstreet 24871c6fdbd8SKent Overstreet ret = bch2_inode_truncate(c, inode->v.i_ino, 24881c6fdbd8SKent Overstreet round_up(new_size, block_bytes(c)) >> 9, 24891c6fdbd8SKent Overstreet &i_sectors_hook.hook, 24901c6fdbd8SKent Overstreet &inode->ei_journal_seq); 24911c6fdbd8SKent Overstreet if (ret) 24921c6fdbd8SKent Overstreet goto err_put_sectors_dirty; 24931c6fdbd8SKent Overstreet 24941c6fdbd8SKent Overstreet i_sectors_hook.new_i_size = new_size; 24951c6fdbd8SKent Overstreet err_put_sectors_dirty: 24961c6fdbd8SKent Overstreet ret = i_sectors_dirty_finish(c, &i_sectors_hook) ?: ret; 24971c6fdbd8SKent Overstreet err: 24981c6fdbd8SKent Overstreet bch2_pagecache_block_put(&inode->ei_pagecache_lock); 24991c6fdbd8SKent Overstreet inode_unlock(&inode->v); 25001c6fdbd8SKent Overstreet return ret; 25011c6fdbd8SKent Overstreet } 25021c6fdbd8SKent Overstreet 25031c6fdbd8SKent Overstreet static long bch2_fallocate(struct bch_inode_info *inode, int mode, 25041c6fdbd8SKent Overstreet loff_t offset, loff_t len) 25051c6fdbd8SKent Overstreet { 25061c6fdbd8SKent Overstreet struct address_space *mapping = inode->v.i_mapping; 25071c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 25081c6fdbd8SKent Overstreet struct i_sectors_hook i_sectors_hook = i_sectors_hook_init(inode, 0); 25091c6fdbd8SKent Overstreet struct btree_iter iter; 25101c6fdbd8SKent Overstreet struct bpos end_pos; 25111c6fdbd8SKent Overstreet loff_t block_start, block_end; 25121c6fdbd8SKent Overstreet loff_t end = offset + len; 25131c6fdbd8SKent Overstreet unsigned sectors; 25141c6fdbd8SKent Overstreet unsigned replicas = io_opts(c, inode).data_replicas; 25151c6fdbd8SKent Overstreet int ret; 25161c6fdbd8SKent Overstreet 25171c6fdbd8SKent Overstreet bch2_btree_iter_init(&iter, c, BTREE_ID_EXTENTS, POS_MIN, 25181c6fdbd8SKent Overstreet BTREE_ITER_SLOTS|BTREE_ITER_INTENT); 25191c6fdbd8SKent Overstreet 25201c6fdbd8SKent Overstreet inode_lock(&inode->v); 25211c6fdbd8SKent Overstreet inode_dio_wait(&inode->v); 25221c6fdbd8SKent Overstreet bch2_pagecache_block_get(&inode->ei_pagecache_lock); 25231c6fdbd8SKent Overstreet 25241c6fdbd8SKent Overstreet if (!(mode & FALLOC_FL_KEEP_SIZE) && end > inode->v.i_size) { 25251c6fdbd8SKent Overstreet ret = inode_newsize_ok(&inode->v, end); 25261c6fdbd8SKent Overstreet if (ret) 25271c6fdbd8SKent Overstreet goto err; 25281c6fdbd8SKent Overstreet } 25291c6fdbd8SKent Overstreet 25301c6fdbd8SKent Overstreet if (mode & FALLOC_FL_ZERO_RANGE) { 25311c6fdbd8SKent Overstreet ret = __bch2_truncate_page(inode, 25321c6fdbd8SKent Overstreet offset >> PAGE_SHIFT, 25331c6fdbd8SKent Overstreet offset, end); 25341c6fdbd8SKent Overstreet 25351c6fdbd8SKent Overstreet if (!ret && 25361c6fdbd8SKent Overstreet offset >> PAGE_SHIFT != end >> PAGE_SHIFT) 25371c6fdbd8SKent Overstreet ret = __bch2_truncate_page(inode, 25381c6fdbd8SKent Overstreet end >> PAGE_SHIFT, 25391c6fdbd8SKent Overstreet offset, end); 25401c6fdbd8SKent Overstreet 25411c6fdbd8SKent Overstreet if (unlikely(ret)) 25421c6fdbd8SKent Overstreet goto err; 25431c6fdbd8SKent Overstreet 25441c6fdbd8SKent Overstreet truncate_pagecache_range(&inode->v, offset, end - 1); 25451c6fdbd8SKent Overstreet 25461c6fdbd8SKent Overstreet block_start = round_up(offset, PAGE_SIZE); 25471c6fdbd8SKent Overstreet block_end = round_down(end, PAGE_SIZE); 25481c6fdbd8SKent Overstreet } else { 25491c6fdbd8SKent Overstreet block_start = round_down(offset, PAGE_SIZE); 25501c6fdbd8SKent Overstreet block_end = round_up(end, PAGE_SIZE); 25511c6fdbd8SKent Overstreet } 25521c6fdbd8SKent Overstreet 25531c6fdbd8SKent Overstreet bch2_btree_iter_set_pos(&iter, POS(inode->v.i_ino, block_start >> 9)); 25541c6fdbd8SKent Overstreet end_pos = POS(inode->v.i_ino, block_end >> 9); 25551c6fdbd8SKent Overstreet 25561c6fdbd8SKent Overstreet ret = i_sectors_dirty_start(c, &i_sectors_hook); 25571c6fdbd8SKent Overstreet if (unlikely(ret)) 25581c6fdbd8SKent Overstreet goto err; 25591c6fdbd8SKent Overstreet 25601c6fdbd8SKent Overstreet while (bkey_cmp(iter.pos, end_pos) < 0) { 25611c6fdbd8SKent Overstreet struct disk_reservation disk_res = { 0 }; 25621c6fdbd8SKent Overstreet struct bkey_i_reservation reservation; 25631c6fdbd8SKent Overstreet struct bkey_s_c k; 25641c6fdbd8SKent Overstreet 25651c6fdbd8SKent Overstreet k = bch2_btree_iter_peek_slot(&iter); 25661c6fdbd8SKent Overstreet if ((ret = btree_iter_err(k))) 25671c6fdbd8SKent Overstreet goto btree_iter_err; 25681c6fdbd8SKent Overstreet 25691c6fdbd8SKent Overstreet /* already reserved */ 25701c6fdbd8SKent Overstreet if (k.k->type == BCH_RESERVATION && 25711c6fdbd8SKent Overstreet bkey_s_c_to_reservation(k).v->nr_replicas >= replicas) { 25721c6fdbd8SKent Overstreet bch2_btree_iter_next_slot(&iter); 25731c6fdbd8SKent Overstreet continue; 25741c6fdbd8SKent Overstreet } 25751c6fdbd8SKent Overstreet 25761c6fdbd8SKent Overstreet if (bkey_extent_is_data(k.k)) { 25771c6fdbd8SKent Overstreet if (!(mode & FALLOC_FL_ZERO_RANGE)) { 25781c6fdbd8SKent Overstreet bch2_btree_iter_next_slot(&iter); 25791c6fdbd8SKent Overstreet continue; 25801c6fdbd8SKent Overstreet } 25811c6fdbd8SKent Overstreet } 25821c6fdbd8SKent Overstreet 25831c6fdbd8SKent Overstreet bkey_reservation_init(&reservation.k_i); 25841c6fdbd8SKent Overstreet reservation.k.type = BCH_RESERVATION; 25851c6fdbd8SKent Overstreet reservation.k.p = k.k->p; 25861c6fdbd8SKent Overstreet reservation.k.size = k.k->size; 25871c6fdbd8SKent Overstreet 25881c6fdbd8SKent Overstreet bch2_cut_front(iter.pos, &reservation.k_i); 25891c6fdbd8SKent Overstreet bch2_cut_back(end_pos, &reservation.k); 25901c6fdbd8SKent Overstreet 25911c6fdbd8SKent Overstreet sectors = reservation.k.size; 25921c6fdbd8SKent Overstreet reservation.v.nr_replicas = bch2_extent_nr_dirty_ptrs(k); 25931c6fdbd8SKent Overstreet 25941c6fdbd8SKent Overstreet if (!bkey_extent_is_allocation(k.k)) { 25951c6fdbd8SKent Overstreet ret = bch2_quota_reservation_add(c, inode, 25961c6fdbd8SKent Overstreet &i_sectors_hook.quota_res, 25971c6fdbd8SKent Overstreet sectors, true); 25981c6fdbd8SKent Overstreet if (unlikely(ret)) 25991c6fdbd8SKent Overstreet goto btree_iter_err; 26001c6fdbd8SKent Overstreet } 26011c6fdbd8SKent Overstreet 26021c6fdbd8SKent Overstreet if (reservation.v.nr_replicas < replicas || 26031c6fdbd8SKent Overstreet bch2_extent_is_compressed(k)) { 26041c6fdbd8SKent Overstreet ret = bch2_disk_reservation_get(c, &disk_res, sectors, 26051c6fdbd8SKent Overstreet replicas, 0); 26061c6fdbd8SKent Overstreet if (unlikely(ret)) 26071c6fdbd8SKent Overstreet goto btree_iter_err; 26081c6fdbd8SKent Overstreet 26091c6fdbd8SKent Overstreet reservation.v.nr_replicas = disk_res.nr_replicas; 26101c6fdbd8SKent Overstreet } 26111c6fdbd8SKent Overstreet 26121c6fdbd8SKent Overstreet ret = bch2_btree_insert_at(c, &disk_res, &i_sectors_hook.hook, 26131c6fdbd8SKent Overstreet &inode->ei_journal_seq, 26141c6fdbd8SKent Overstreet BTREE_INSERT_ATOMIC| 26151c6fdbd8SKent Overstreet BTREE_INSERT_NOFAIL, 26161c6fdbd8SKent Overstreet BTREE_INSERT_ENTRY(&iter, &reservation.k_i)); 26171c6fdbd8SKent Overstreet bch2_disk_reservation_put(c, &disk_res); 26181c6fdbd8SKent Overstreet btree_iter_err: 26191c6fdbd8SKent Overstreet if (ret == -EINTR) 26201c6fdbd8SKent Overstreet ret = 0; 26211c6fdbd8SKent Overstreet if (ret) { 26221c6fdbd8SKent Overstreet bch2_btree_iter_unlock(&iter); 26231c6fdbd8SKent Overstreet goto err_put_sectors_dirty; 26241c6fdbd8SKent Overstreet } 26251c6fdbd8SKent Overstreet 26261c6fdbd8SKent Overstreet } 26271c6fdbd8SKent Overstreet bch2_btree_iter_unlock(&iter); 26281c6fdbd8SKent Overstreet 26291c6fdbd8SKent Overstreet ret = i_sectors_dirty_finish(c, &i_sectors_hook) ?: ret; 26301c6fdbd8SKent Overstreet 26311c6fdbd8SKent Overstreet if (!(mode & FALLOC_FL_KEEP_SIZE) && 26321c6fdbd8SKent Overstreet end > inode->v.i_size) { 26331c6fdbd8SKent Overstreet i_size_write(&inode->v, end); 26341c6fdbd8SKent Overstreet 26351c6fdbd8SKent Overstreet mutex_lock(&inode->ei_update_lock); 2636*2ea90048SKent Overstreet ret = bch2_write_inode_size(c, inode, inode->v.i_size, 0); 26371c6fdbd8SKent Overstreet mutex_unlock(&inode->ei_update_lock); 26381c6fdbd8SKent Overstreet } 26391c6fdbd8SKent Overstreet 26401c6fdbd8SKent Overstreet /* blech */ 26411c6fdbd8SKent Overstreet if ((mode & FALLOC_FL_KEEP_SIZE) && 26421c6fdbd8SKent Overstreet (mode & FALLOC_FL_ZERO_RANGE) && 26431c6fdbd8SKent Overstreet inode->ei_inode.bi_size != inode->v.i_size) { 26441c6fdbd8SKent Overstreet /* sync appends.. */ 26451c6fdbd8SKent Overstreet ret = filemap_write_and_wait_range(mapping, 26461c6fdbd8SKent Overstreet inode->ei_inode.bi_size, S64_MAX); 26471c6fdbd8SKent Overstreet if (ret) 26481c6fdbd8SKent Overstreet goto err; 26491c6fdbd8SKent Overstreet 26501c6fdbd8SKent Overstreet if (inode->ei_inode.bi_size != inode->v.i_size) { 26511c6fdbd8SKent Overstreet mutex_lock(&inode->ei_update_lock); 2652*2ea90048SKent Overstreet ret = bch2_write_inode_size(c, inode, 2653*2ea90048SKent Overstreet inode->v.i_size, 0); 26541c6fdbd8SKent Overstreet mutex_unlock(&inode->ei_update_lock); 26551c6fdbd8SKent Overstreet } 26561c6fdbd8SKent Overstreet } 26571c6fdbd8SKent Overstreet 26581c6fdbd8SKent Overstreet bch2_pagecache_block_put(&inode->ei_pagecache_lock); 26591c6fdbd8SKent Overstreet inode_unlock(&inode->v); 26601c6fdbd8SKent Overstreet 26611c6fdbd8SKent Overstreet return 0; 26621c6fdbd8SKent Overstreet err_put_sectors_dirty: 26631c6fdbd8SKent Overstreet ret = i_sectors_dirty_finish(c, &i_sectors_hook) ?: ret; 26641c6fdbd8SKent Overstreet err: 26651c6fdbd8SKent Overstreet bch2_pagecache_block_put(&inode->ei_pagecache_lock); 26661c6fdbd8SKent Overstreet inode_unlock(&inode->v); 26671c6fdbd8SKent Overstreet return ret; 26681c6fdbd8SKent Overstreet } 26691c6fdbd8SKent Overstreet 26701c6fdbd8SKent Overstreet long bch2_fallocate_dispatch(struct file *file, int mode, 26711c6fdbd8SKent Overstreet loff_t offset, loff_t len) 26721c6fdbd8SKent Overstreet { 26731c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 26741c6fdbd8SKent Overstreet 26751c6fdbd8SKent Overstreet if (!(mode & ~(FALLOC_FL_KEEP_SIZE|FALLOC_FL_ZERO_RANGE))) 26761c6fdbd8SKent Overstreet return bch2_fallocate(inode, mode, offset, len); 26771c6fdbd8SKent Overstreet 26781c6fdbd8SKent Overstreet if (mode == (FALLOC_FL_PUNCH_HOLE|FALLOC_FL_KEEP_SIZE)) 26791c6fdbd8SKent Overstreet return bch2_fpunch(inode, offset, len); 26801c6fdbd8SKent Overstreet 26811c6fdbd8SKent Overstreet if (mode == FALLOC_FL_COLLAPSE_RANGE) 26821c6fdbd8SKent Overstreet return bch2_fcollapse(inode, offset, len); 26831c6fdbd8SKent Overstreet 26841c6fdbd8SKent Overstreet return -EOPNOTSUPP; 26851c6fdbd8SKent Overstreet } 26861c6fdbd8SKent Overstreet 26871c6fdbd8SKent Overstreet /* fseek: */ 26881c6fdbd8SKent Overstreet 26891c6fdbd8SKent Overstreet static bool folio_is_data(struct folio *folio) 26901c6fdbd8SKent Overstreet { 26911c6fdbd8SKent Overstreet /* XXX: should only have to check PageDirty */ 26921c6fdbd8SKent Overstreet return folio_test_private(folio) && 26931c6fdbd8SKent Overstreet (page_state(&folio->page)->sectors || 26941c6fdbd8SKent Overstreet page_state(&folio->page)->dirty_sectors); 26951c6fdbd8SKent Overstreet } 26961c6fdbd8SKent Overstreet 26971c6fdbd8SKent Overstreet static loff_t bch2_next_pagecache_data(struct inode *vinode, 26981c6fdbd8SKent Overstreet loff_t start_offset, 26991c6fdbd8SKent Overstreet loff_t end_offset) 27001c6fdbd8SKent Overstreet { 27011c6fdbd8SKent Overstreet struct folio_batch fbatch; 27021c6fdbd8SKent Overstreet pgoff_t start_index = start_offset >> PAGE_SHIFT; 27031c6fdbd8SKent Overstreet pgoff_t end_index = end_offset >> PAGE_SHIFT; 27041c6fdbd8SKent Overstreet pgoff_t index = start_index; 27051c6fdbd8SKent Overstreet unsigned i; 27061c6fdbd8SKent Overstreet 27071c6fdbd8SKent Overstreet folio_batch_init(&fbatch); 27081c6fdbd8SKent Overstreet 27091c6fdbd8SKent Overstreet while (filemap_get_folios(vinode->i_mapping, 27101c6fdbd8SKent Overstreet &index, end_index, &fbatch)) { 27111c6fdbd8SKent Overstreet for (i = 0; i < folio_batch_count(&fbatch); i++) { 27121c6fdbd8SKent Overstreet struct folio *folio = fbatch.folios[i]; 27131c6fdbd8SKent Overstreet 27141c6fdbd8SKent Overstreet folio_lock(folio); 27151c6fdbd8SKent Overstreet if (folio_is_data(folio)) { 27161c6fdbd8SKent Overstreet end_offset = 27171c6fdbd8SKent Overstreet min(end_offset, 27181c6fdbd8SKent Overstreet max(start_offset, 27191c6fdbd8SKent Overstreet ((loff_t) index) << PAGE_SHIFT)); 27201c6fdbd8SKent Overstreet folio_unlock(folio); 27211c6fdbd8SKent Overstreet folio_batch_release(&fbatch); 27221c6fdbd8SKent Overstreet return end_offset; 27231c6fdbd8SKent Overstreet } 27241c6fdbd8SKent Overstreet folio_unlock(folio); 27251c6fdbd8SKent Overstreet } 27261c6fdbd8SKent Overstreet folio_batch_release(&fbatch); 27271c6fdbd8SKent Overstreet cond_resched(); 27281c6fdbd8SKent Overstreet } 27291c6fdbd8SKent Overstreet 27301c6fdbd8SKent Overstreet return end_offset; 27311c6fdbd8SKent Overstreet } 27321c6fdbd8SKent Overstreet 27331c6fdbd8SKent Overstreet static loff_t bch2_seek_data(struct file *file, u64 offset) 27341c6fdbd8SKent Overstreet { 27351c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 27361c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 27371c6fdbd8SKent Overstreet struct btree_iter iter; 27381c6fdbd8SKent Overstreet struct bkey_s_c k; 27391c6fdbd8SKent Overstreet u64 isize, next_data = MAX_LFS_FILESIZE; 27401c6fdbd8SKent Overstreet int ret; 27411c6fdbd8SKent Overstreet 27421c6fdbd8SKent Overstreet isize = i_size_read(&inode->v); 27431c6fdbd8SKent Overstreet if (offset >= isize) 27441c6fdbd8SKent Overstreet return -ENXIO; 27451c6fdbd8SKent Overstreet 27461c6fdbd8SKent Overstreet for_each_btree_key(&iter, c, BTREE_ID_EXTENTS, 27471c6fdbd8SKent Overstreet POS(inode->v.i_ino, offset >> 9), 0, k) { 27481c6fdbd8SKent Overstreet if (k.k->p.inode != inode->v.i_ino) { 27491c6fdbd8SKent Overstreet break; 27501c6fdbd8SKent Overstreet } else if (bkey_extent_is_data(k.k)) { 27511c6fdbd8SKent Overstreet next_data = max(offset, bkey_start_offset(k.k) << 9); 27521c6fdbd8SKent Overstreet break; 27531c6fdbd8SKent Overstreet } else if (k.k->p.offset >> 9 > isize) 27541c6fdbd8SKent Overstreet break; 27551c6fdbd8SKent Overstreet } 27561c6fdbd8SKent Overstreet 27571c6fdbd8SKent Overstreet ret = bch2_btree_iter_unlock(&iter); 27581c6fdbd8SKent Overstreet if (ret) 27591c6fdbd8SKent Overstreet return ret; 27601c6fdbd8SKent Overstreet 27611c6fdbd8SKent Overstreet if (next_data > offset) 27621c6fdbd8SKent Overstreet next_data = bch2_next_pagecache_data(&inode->v, 27631c6fdbd8SKent Overstreet offset, next_data); 27641c6fdbd8SKent Overstreet 27651c6fdbd8SKent Overstreet if (next_data > isize) 27661c6fdbd8SKent Overstreet return -ENXIO; 27671c6fdbd8SKent Overstreet 27681c6fdbd8SKent Overstreet return vfs_setpos(file, next_data, MAX_LFS_FILESIZE); 27691c6fdbd8SKent Overstreet } 27701c6fdbd8SKent Overstreet 27711c6fdbd8SKent Overstreet static bool page_slot_is_data(struct address_space *mapping, pgoff_t index) 27721c6fdbd8SKent Overstreet { 27731c6fdbd8SKent Overstreet struct page *page; 27741c6fdbd8SKent Overstreet bool ret; 27751c6fdbd8SKent Overstreet 27761c6fdbd8SKent Overstreet page = find_lock_page(mapping, index); 27771c6fdbd8SKent Overstreet if (!page) 27781c6fdbd8SKent Overstreet return false; 27791c6fdbd8SKent Overstreet 27801c6fdbd8SKent Overstreet ret = folio_is_data(page_folio(page)); 27811c6fdbd8SKent Overstreet unlock_page(page); 27821c6fdbd8SKent Overstreet 27831c6fdbd8SKent Overstreet return ret; 27841c6fdbd8SKent Overstreet } 27851c6fdbd8SKent Overstreet 27861c6fdbd8SKent Overstreet static loff_t bch2_next_pagecache_hole(struct inode *vinode, 27871c6fdbd8SKent Overstreet loff_t start_offset, 27881c6fdbd8SKent Overstreet loff_t end_offset) 27891c6fdbd8SKent Overstreet { 27901c6fdbd8SKent Overstreet struct address_space *mapping = vinode->i_mapping; 27911c6fdbd8SKent Overstreet pgoff_t index; 27921c6fdbd8SKent Overstreet 27931c6fdbd8SKent Overstreet for (index = start_offset >> PAGE_SHIFT; 27941c6fdbd8SKent Overstreet index < end_offset >> PAGE_SHIFT; 27951c6fdbd8SKent Overstreet index++) 27961c6fdbd8SKent Overstreet if (!page_slot_is_data(mapping, index)) 27971c6fdbd8SKent Overstreet end_offset = max(start_offset, 27981c6fdbd8SKent Overstreet ((loff_t) index) << PAGE_SHIFT); 27991c6fdbd8SKent Overstreet 28001c6fdbd8SKent Overstreet return end_offset; 28011c6fdbd8SKent Overstreet } 28021c6fdbd8SKent Overstreet 28031c6fdbd8SKent Overstreet static loff_t bch2_seek_hole(struct file *file, u64 offset) 28041c6fdbd8SKent Overstreet { 28051c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 28061c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 28071c6fdbd8SKent Overstreet struct btree_iter iter; 28081c6fdbd8SKent Overstreet struct bkey_s_c k; 28091c6fdbd8SKent Overstreet u64 isize, next_hole = MAX_LFS_FILESIZE; 28101c6fdbd8SKent Overstreet int ret; 28111c6fdbd8SKent Overstreet 28121c6fdbd8SKent Overstreet isize = i_size_read(&inode->v); 28131c6fdbd8SKent Overstreet if (offset >= isize) 28141c6fdbd8SKent Overstreet return -ENXIO; 28151c6fdbd8SKent Overstreet 28161c6fdbd8SKent Overstreet for_each_btree_key(&iter, c, BTREE_ID_EXTENTS, 28171c6fdbd8SKent Overstreet POS(inode->v.i_ino, offset >> 9), 28181c6fdbd8SKent Overstreet BTREE_ITER_SLOTS, k) { 28191c6fdbd8SKent Overstreet if (k.k->p.inode != inode->v.i_ino) { 28201c6fdbd8SKent Overstreet next_hole = bch2_next_pagecache_hole(&inode->v, 28211c6fdbd8SKent Overstreet offset, MAX_LFS_FILESIZE); 28221c6fdbd8SKent Overstreet break; 28231c6fdbd8SKent Overstreet } else if (!bkey_extent_is_data(k.k)) { 28241c6fdbd8SKent Overstreet next_hole = bch2_next_pagecache_hole(&inode->v, 28251c6fdbd8SKent Overstreet max(offset, bkey_start_offset(k.k) << 9), 28261c6fdbd8SKent Overstreet k.k->p.offset << 9); 28271c6fdbd8SKent Overstreet 28281c6fdbd8SKent Overstreet if (next_hole < k.k->p.offset << 9) 28291c6fdbd8SKent Overstreet break; 28301c6fdbd8SKent Overstreet } else { 28311c6fdbd8SKent Overstreet offset = max(offset, bkey_start_offset(k.k) << 9); 28321c6fdbd8SKent Overstreet } 28331c6fdbd8SKent Overstreet } 28341c6fdbd8SKent Overstreet 28351c6fdbd8SKent Overstreet ret = bch2_btree_iter_unlock(&iter); 28361c6fdbd8SKent Overstreet if (ret) 28371c6fdbd8SKent Overstreet return ret; 28381c6fdbd8SKent Overstreet 28391c6fdbd8SKent Overstreet if (next_hole > isize) 28401c6fdbd8SKent Overstreet next_hole = isize; 28411c6fdbd8SKent Overstreet 28421c6fdbd8SKent Overstreet return vfs_setpos(file, next_hole, MAX_LFS_FILESIZE); 28431c6fdbd8SKent Overstreet } 28441c6fdbd8SKent Overstreet 28451c6fdbd8SKent Overstreet loff_t bch2_llseek(struct file *file, loff_t offset, int whence) 28461c6fdbd8SKent Overstreet { 28471c6fdbd8SKent Overstreet switch (whence) { 28481c6fdbd8SKent Overstreet case SEEK_SET: 28491c6fdbd8SKent Overstreet case SEEK_CUR: 28501c6fdbd8SKent Overstreet case SEEK_END: 28511c6fdbd8SKent Overstreet return generic_file_llseek(file, offset, whence); 28521c6fdbd8SKent Overstreet case SEEK_DATA: 28531c6fdbd8SKent Overstreet return bch2_seek_data(file, offset); 28541c6fdbd8SKent Overstreet case SEEK_HOLE: 28551c6fdbd8SKent Overstreet return bch2_seek_hole(file, offset); 28561c6fdbd8SKent Overstreet } 28571c6fdbd8SKent Overstreet 28581c6fdbd8SKent Overstreet return -EINVAL; 28591c6fdbd8SKent Overstreet } 28601c6fdbd8SKent Overstreet 28611c6fdbd8SKent Overstreet void bch2_fs_fsio_exit(struct bch_fs *c) 28621c6fdbd8SKent Overstreet { 28631c6fdbd8SKent Overstreet bioset_exit(&c->dio_write_bioset); 28641c6fdbd8SKent Overstreet bioset_exit(&c->dio_read_bioset); 28651c6fdbd8SKent Overstreet bioset_exit(&c->writepage_bioset); 28661c6fdbd8SKent Overstreet } 28671c6fdbd8SKent Overstreet 28681c6fdbd8SKent Overstreet int bch2_fs_fsio_init(struct bch_fs *c) 28691c6fdbd8SKent Overstreet { 28701c6fdbd8SKent Overstreet int ret = 0; 28711c6fdbd8SKent Overstreet 28721c6fdbd8SKent Overstreet pr_verbose_init(c->opts, ""); 28731c6fdbd8SKent Overstreet 28741c6fdbd8SKent Overstreet if (bioset_init(&c->writepage_bioset, 28751c6fdbd8SKent Overstreet 4, offsetof(struct bch_writepage_io, op.op.wbio.bio), 28761c6fdbd8SKent Overstreet BIOSET_NEED_BVECS) || 28771c6fdbd8SKent Overstreet bioset_init(&c->dio_read_bioset, 28781c6fdbd8SKent Overstreet 4, offsetof(struct dio_read, rbio.bio), 28791c6fdbd8SKent Overstreet BIOSET_NEED_BVECS) || 28801c6fdbd8SKent Overstreet bioset_init(&c->dio_write_bioset, 28811c6fdbd8SKent Overstreet 4, offsetof(struct dio_write, iop.op.wbio.bio), 28821c6fdbd8SKent Overstreet BIOSET_NEED_BVECS)) 28831c6fdbd8SKent Overstreet ret = -ENOMEM; 28841c6fdbd8SKent Overstreet 28851c6fdbd8SKent Overstreet pr_verbose_init(c->opts, "ret %i", ret); 28861c6fdbd8SKent Overstreet return ret; 28871c6fdbd8SKent Overstreet } 28881c6fdbd8SKent Overstreet 28891c6fdbd8SKent Overstreet #endif /* NO_BCACHEFS_FS */ 2890