11c6fdbd8SKent Overstreet // SPDX-License-Identifier: GPL-2.0 21c6fdbd8SKent Overstreet #ifndef NO_BCACHEFS_FS 31c6fdbd8SKent Overstreet 41c6fdbd8SKent Overstreet #include "bcachefs.h" 57b3f84eaSKent Overstreet #include "alloc_foreground.h" 61c6fdbd8SKent Overstreet #include "btree_update.h" 71c6fdbd8SKent Overstreet #include "buckets.h" 81c6fdbd8SKent Overstreet #include "clock.h" 91c6fdbd8SKent Overstreet #include "error.h" 10e2d9912cSKent Overstreet #include "extents.h" 111c6fdbd8SKent Overstreet #include "fs.h" 121c6fdbd8SKent Overstreet #include "fs-io.h" 131c6fdbd8SKent Overstreet #include "fsck.h" 141c6fdbd8SKent Overstreet #include "inode.h" 151c6fdbd8SKent Overstreet #include "journal.h" 161c6fdbd8SKent Overstreet #include "io.h" 171c6fdbd8SKent Overstreet #include "keylist.h" 181c6fdbd8SKent Overstreet #include "quota.h" 1976426098SKent Overstreet #include "reflink.h" 201c6fdbd8SKent Overstreet #include "trace.h" 211c6fdbd8SKent Overstreet 221c6fdbd8SKent Overstreet #include <linux/aio.h> 231c6fdbd8SKent Overstreet #include <linux/backing-dev.h> 241c6fdbd8SKent Overstreet #include <linux/falloc.h> 251c6fdbd8SKent Overstreet #include <linux/migrate.h> 261c6fdbd8SKent Overstreet #include <linux/mmu_context.h> 271c6fdbd8SKent Overstreet #include <linux/pagevec.h> 281c6fdbd8SKent Overstreet #include <linux/sched/signal.h> 291c6fdbd8SKent Overstreet #include <linux/task_io_accounting_ops.h> 301c6fdbd8SKent Overstreet #include <linux/uio.h> 311c6fdbd8SKent Overstreet #include <linux/writeback.h> 321c6fdbd8SKent Overstreet 331c6fdbd8SKent Overstreet #include <trace/events/writeback.h> 341c6fdbd8SKent Overstreet 357f5e31e1SKent Overstreet static inline bool bio_full(struct bio *bio, unsigned len) 367f5e31e1SKent Overstreet { 377f5e31e1SKent Overstreet if (bio->bi_vcnt >= bio->bi_max_vecs) 387f5e31e1SKent Overstreet return true; 397f5e31e1SKent Overstreet if (bio->bi_iter.bi_size > UINT_MAX - len) 407f5e31e1SKent Overstreet return true; 417f5e31e1SKent Overstreet return false; 427f5e31e1SKent Overstreet } 437f5e31e1SKent Overstreet 441c6fdbd8SKent Overstreet struct quota_res { 451c6fdbd8SKent Overstreet u64 sectors; 461c6fdbd8SKent Overstreet }; 471c6fdbd8SKent Overstreet 489a3df993SKent Overstreet struct bch_writepage_io { 499a3df993SKent Overstreet struct closure cl; 501c6fdbd8SKent Overstreet struct bch_inode_info *inode; 511c6fdbd8SKent Overstreet 521c6fdbd8SKent Overstreet /* must be last: */ 531c6fdbd8SKent Overstreet struct bch_write_op op; 541c6fdbd8SKent Overstreet }; 551c6fdbd8SKent Overstreet 561c6fdbd8SKent Overstreet struct dio_write { 57f8f30863SKent Overstreet struct completion done; 581c6fdbd8SKent Overstreet struct kiocb *req; 59ed484030SKent Overstreet struct mm_struct *mm; 601c6fdbd8SKent Overstreet unsigned loop:1, 611c6fdbd8SKent Overstreet sync:1, 621c6fdbd8SKent Overstreet free_iov:1; 631c6fdbd8SKent Overstreet struct quota_res quota_res; 641c6fdbd8SKent Overstreet 651c6fdbd8SKent Overstreet struct iov_iter iter; 661c6fdbd8SKent Overstreet struct iovec inline_vecs[2]; 671c6fdbd8SKent Overstreet 681c6fdbd8SKent Overstreet /* must be last: */ 699a3df993SKent Overstreet struct bch_write_op op; 701c6fdbd8SKent Overstreet }; 711c6fdbd8SKent Overstreet 721c6fdbd8SKent Overstreet struct dio_read { 731c6fdbd8SKent Overstreet struct closure cl; 741c6fdbd8SKent Overstreet struct kiocb *req; 751c6fdbd8SKent Overstreet long ret; 761c6fdbd8SKent Overstreet struct bch_read_bio rbio; 771c6fdbd8SKent Overstreet }; 781c6fdbd8SKent Overstreet 791c6fdbd8SKent Overstreet /* pagecache_block must be held */ 80a023127aSKent Overstreet static noinline int write_invalidate_inode_pages_range(struct address_space *mapping, 811c6fdbd8SKent Overstreet loff_t start, loff_t end) 821c6fdbd8SKent Overstreet { 831c6fdbd8SKent Overstreet int ret; 841c6fdbd8SKent Overstreet 851c6fdbd8SKent Overstreet /* 861c6fdbd8SKent Overstreet * XXX: the way this is currently implemented, we can spin if a process 871c6fdbd8SKent Overstreet * is continually redirtying a specific page 881c6fdbd8SKent Overstreet */ 891c6fdbd8SKent Overstreet do { 901c6fdbd8SKent Overstreet if (!mapping->nrpages) 911c6fdbd8SKent Overstreet return 0; 921c6fdbd8SKent Overstreet 931c6fdbd8SKent Overstreet ret = filemap_write_and_wait_range(mapping, start, end); 941c6fdbd8SKent Overstreet if (ret) 951c6fdbd8SKent Overstreet break; 961c6fdbd8SKent Overstreet 971c6fdbd8SKent Overstreet if (!mapping->nrpages) 981c6fdbd8SKent Overstreet return 0; 991c6fdbd8SKent Overstreet 1001c6fdbd8SKent Overstreet ret = invalidate_inode_pages2_range(mapping, 1011c6fdbd8SKent Overstreet start >> PAGE_SHIFT, 1021c6fdbd8SKent Overstreet end >> PAGE_SHIFT); 1031c6fdbd8SKent Overstreet } while (ret == -EBUSY); 1041c6fdbd8SKent Overstreet 1051c6fdbd8SKent Overstreet return ret; 1061c6fdbd8SKent Overstreet } 1071c6fdbd8SKent Overstreet 1081c6fdbd8SKent Overstreet /* quotas */ 1091c6fdbd8SKent Overstreet 1101c6fdbd8SKent Overstreet #ifdef CONFIG_BCACHEFS_QUOTA 1111c6fdbd8SKent Overstreet 1121c6fdbd8SKent Overstreet static void bch2_quota_reservation_put(struct bch_fs *c, 1131c6fdbd8SKent Overstreet struct bch_inode_info *inode, 1141c6fdbd8SKent Overstreet struct quota_res *res) 1151c6fdbd8SKent Overstreet { 1161c6fdbd8SKent Overstreet if (!res->sectors) 1171c6fdbd8SKent Overstreet return; 1181c6fdbd8SKent Overstreet 1191c6fdbd8SKent Overstreet mutex_lock(&inode->ei_quota_lock); 1201c6fdbd8SKent Overstreet BUG_ON(res->sectors > inode->ei_quota_reserved); 1211c6fdbd8SKent Overstreet 1221c6fdbd8SKent Overstreet bch2_quota_acct(c, inode->ei_qid, Q_SPC, 12326609b61SKent Overstreet -((s64) res->sectors), KEY_TYPE_QUOTA_PREALLOC); 1241c6fdbd8SKent Overstreet inode->ei_quota_reserved -= res->sectors; 1251c6fdbd8SKent Overstreet mutex_unlock(&inode->ei_quota_lock); 1261c6fdbd8SKent Overstreet 1271c6fdbd8SKent Overstreet res->sectors = 0; 1281c6fdbd8SKent Overstreet } 1291c6fdbd8SKent Overstreet 1301c6fdbd8SKent Overstreet static int bch2_quota_reservation_add(struct bch_fs *c, 1311c6fdbd8SKent Overstreet struct bch_inode_info *inode, 1321c6fdbd8SKent Overstreet struct quota_res *res, 1331c6fdbd8SKent Overstreet unsigned sectors, 1341c6fdbd8SKent Overstreet bool check_enospc) 1351c6fdbd8SKent Overstreet { 1361c6fdbd8SKent Overstreet int ret; 1371c6fdbd8SKent Overstreet 1381c6fdbd8SKent Overstreet mutex_lock(&inode->ei_quota_lock); 1391c6fdbd8SKent Overstreet ret = bch2_quota_acct(c, inode->ei_qid, Q_SPC, sectors, 14026609b61SKent Overstreet check_enospc ? KEY_TYPE_QUOTA_PREALLOC : KEY_TYPE_QUOTA_NOCHECK); 1411c6fdbd8SKent Overstreet if (likely(!ret)) { 1421c6fdbd8SKent Overstreet inode->ei_quota_reserved += sectors; 1431c6fdbd8SKent Overstreet res->sectors += sectors; 1441c6fdbd8SKent Overstreet } 1451c6fdbd8SKent Overstreet mutex_unlock(&inode->ei_quota_lock); 1461c6fdbd8SKent Overstreet 1471c6fdbd8SKent Overstreet return ret; 1481c6fdbd8SKent Overstreet } 1491c6fdbd8SKent Overstreet 1501c6fdbd8SKent Overstreet #else 1511c6fdbd8SKent Overstreet 1521c6fdbd8SKent Overstreet static void bch2_quota_reservation_put(struct bch_fs *c, 1531c6fdbd8SKent Overstreet struct bch_inode_info *inode, 1541c6fdbd8SKent Overstreet struct quota_res *res) 1551c6fdbd8SKent Overstreet { 1561c6fdbd8SKent Overstreet } 1571c6fdbd8SKent Overstreet 1581c6fdbd8SKent Overstreet static int bch2_quota_reservation_add(struct bch_fs *c, 1591c6fdbd8SKent Overstreet struct bch_inode_info *inode, 1601c6fdbd8SKent Overstreet struct quota_res *res, 1611c6fdbd8SKent Overstreet unsigned sectors, 1621c6fdbd8SKent Overstreet bool check_enospc) 1631c6fdbd8SKent Overstreet { 1641c6fdbd8SKent Overstreet return 0; 1651c6fdbd8SKent Overstreet } 1661c6fdbd8SKent Overstreet 1671c6fdbd8SKent Overstreet #endif 1681c6fdbd8SKent Overstreet 1691c6fdbd8SKent Overstreet /* i_size updates: */ 1701c6fdbd8SKent Overstreet 1712ea90048SKent Overstreet struct inode_new_size { 1722ea90048SKent Overstreet loff_t new_size; 1732ea90048SKent Overstreet u64 now; 1742ea90048SKent Overstreet unsigned fields; 1752ea90048SKent Overstreet }; 1762ea90048SKent Overstreet 1771c6fdbd8SKent Overstreet static int inode_set_size(struct bch_inode_info *inode, 1781c6fdbd8SKent Overstreet struct bch_inode_unpacked *bi, 1791c6fdbd8SKent Overstreet void *p) 1801c6fdbd8SKent Overstreet { 1812ea90048SKent Overstreet struct inode_new_size *s = p; 1821c6fdbd8SKent Overstreet 1832ea90048SKent Overstreet bi->bi_size = s->new_size; 1842ea90048SKent Overstreet if (s->fields & ATTR_ATIME) 1852ea90048SKent Overstreet bi->bi_atime = s->now; 1862ea90048SKent Overstreet if (s->fields & ATTR_MTIME) 1872ea90048SKent Overstreet bi->bi_mtime = s->now; 1882ea90048SKent Overstreet if (s->fields & ATTR_CTIME) 1892ea90048SKent Overstreet bi->bi_ctime = s->now; 1901c6fdbd8SKent Overstreet 1911c6fdbd8SKent Overstreet return 0; 1921c6fdbd8SKent Overstreet } 1931c6fdbd8SKent Overstreet 19476426098SKent Overstreet int __must_check bch2_write_inode_size(struct bch_fs *c, 1951c6fdbd8SKent Overstreet struct bch_inode_info *inode, 1962ea90048SKent Overstreet loff_t new_size, unsigned fields) 1971c6fdbd8SKent Overstreet { 1982ea90048SKent Overstreet struct inode_new_size s = { 1992ea90048SKent Overstreet .new_size = new_size, 2002ea90048SKent Overstreet .now = bch2_current_time(c), 2012ea90048SKent Overstreet .fields = fields, 2022ea90048SKent Overstreet }; 2032ea90048SKent Overstreet 2042ea90048SKent Overstreet return bch2_write_inode(c, inode, inode_set_size, &s, fields); 2051c6fdbd8SKent Overstreet } 2061c6fdbd8SKent Overstreet 2071c6fdbd8SKent Overstreet static void i_sectors_acct(struct bch_fs *c, struct bch_inode_info *inode, 208190fa7afSKent Overstreet struct quota_res *quota_res, s64 sectors) 2091c6fdbd8SKent Overstreet { 210190fa7afSKent Overstreet if (!sectors) 211190fa7afSKent Overstreet return; 212190fa7afSKent Overstreet 2131c6fdbd8SKent Overstreet mutex_lock(&inode->ei_quota_lock); 2141c6fdbd8SKent Overstreet #ifdef CONFIG_BCACHEFS_QUOTA 2151c6fdbd8SKent Overstreet if (quota_res && sectors > 0) { 2161c6fdbd8SKent Overstreet BUG_ON(sectors > quota_res->sectors); 2171c6fdbd8SKent Overstreet BUG_ON(sectors > inode->ei_quota_reserved); 2181c6fdbd8SKent Overstreet 2191c6fdbd8SKent Overstreet quota_res->sectors -= sectors; 2201c6fdbd8SKent Overstreet inode->ei_quota_reserved -= sectors; 2211c6fdbd8SKent Overstreet } else { 22226609b61SKent Overstreet bch2_quota_acct(c, inode->ei_qid, Q_SPC, sectors, KEY_TYPE_QUOTA_WARN); 2231c6fdbd8SKent Overstreet } 2241c6fdbd8SKent Overstreet #endif 2251c6fdbd8SKent Overstreet inode->v.i_blocks += sectors; 2261c6fdbd8SKent Overstreet mutex_unlock(&inode->ei_quota_lock); 2271c6fdbd8SKent Overstreet } 2281c6fdbd8SKent Overstreet 2291c6fdbd8SKent Overstreet /* page state: */ 2301c6fdbd8SKent Overstreet 2311c6fdbd8SKent Overstreet /* stored in page->private: */ 2321c6fdbd8SKent Overstreet 233f57a6a5dSKent Overstreet struct bch_page_sector { 234f81b648dSKent Overstreet /* Uncompressed, fully allocated replicas: */ 235f57a6a5dSKent Overstreet unsigned nr_replicas:3; 236f81b648dSKent Overstreet 237f81b648dSKent Overstreet /* Owns PAGE_SECTORS * replicas_reserved sized reservation: */ 238f57a6a5dSKent Overstreet unsigned replicas_reserved:3; 2391c6fdbd8SKent Overstreet 240f57a6a5dSKent Overstreet /* i_sectors: */ 241f57a6a5dSKent Overstreet enum { 242f57a6a5dSKent Overstreet SECTOR_UNALLOCATED, 2432ba5d38bSKent Overstreet SECTOR_RESERVED, 244f57a6a5dSKent Overstreet SECTOR_DIRTY, 245f57a6a5dSKent Overstreet SECTOR_ALLOCATED, 246f57a6a5dSKent Overstreet } state:2; 2471c6fdbd8SKent Overstreet }; 2481c6fdbd8SKent Overstreet 249f57a6a5dSKent Overstreet struct bch_page_state { 2503826ee0bSKent Overstreet spinlock_t lock; 2517f5e31e1SKent Overstreet atomic_t write_count; 252f57a6a5dSKent Overstreet struct bch_page_sector s[PAGE_SECTORS]; 253f57a6a5dSKent Overstreet }; 254f57a6a5dSKent Overstreet 255f57a6a5dSKent Overstreet static inline struct bch_page_state *__bch2_page_state(struct page *page) 2561c6fdbd8SKent Overstreet { 257f57a6a5dSKent Overstreet return page_has_private(page) 258f57a6a5dSKent Overstreet ? (struct bch_page_state *) page_private(page) 259f57a6a5dSKent Overstreet : NULL; 260f57a6a5dSKent Overstreet } 2611c6fdbd8SKent Overstreet 262f57a6a5dSKent Overstreet static inline struct bch_page_state *bch2_page_state(struct page *page) 263f57a6a5dSKent Overstreet { 264e1036a2aSKent Overstreet EBUG_ON(!PageLocked(page)); 2651c6fdbd8SKent Overstreet 266f57a6a5dSKent Overstreet return __bch2_page_state(page); 267f57a6a5dSKent Overstreet } 268f57a6a5dSKent Overstreet 269f57a6a5dSKent Overstreet /* for newly allocated pages: */ 270f57a6a5dSKent Overstreet static void __bch2_page_state_release(struct page *page) 271f57a6a5dSKent Overstreet { 272f57a6a5dSKent Overstreet struct bch_page_state *s = __bch2_page_state(page); 273f57a6a5dSKent Overstreet 274f57a6a5dSKent Overstreet if (!s) 275f57a6a5dSKent Overstreet return; 276f57a6a5dSKent Overstreet 277f57a6a5dSKent Overstreet ClearPagePrivate(page); 278f57a6a5dSKent Overstreet set_page_private(page, 0); 279f57a6a5dSKent Overstreet put_page(page); 280f57a6a5dSKent Overstreet kfree(s); 281f57a6a5dSKent Overstreet } 282f57a6a5dSKent Overstreet 283f57a6a5dSKent Overstreet static void bch2_page_state_release(struct page *page) 284f57a6a5dSKent Overstreet { 285f57a6a5dSKent Overstreet struct bch_page_state *s = bch2_page_state(page); 286f57a6a5dSKent Overstreet 287f57a6a5dSKent Overstreet if (!s) 288f57a6a5dSKent Overstreet return; 289f57a6a5dSKent Overstreet 290f57a6a5dSKent Overstreet ClearPagePrivate(page); 291f57a6a5dSKent Overstreet set_page_private(page, 0); 292f57a6a5dSKent Overstreet put_page(page); 293f57a6a5dSKent Overstreet kfree(s); 294f57a6a5dSKent Overstreet } 295f57a6a5dSKent Overstreet 296f57a6a5dSKent Overstreet /* for newly allocated pages: */ 297f57a6a5dSKent Overstreet static struct bch_page_state *__bch2_page_state_create(struct page *page, 298f57a6a5dSKent Overstreet gfp_t gfp) 299f57a6a5dSKent Overstreet { 300f57a6a5dSKent Overstreet struct bch_page_state *s; 301f57a6a5dSKent Overstreet 302f57a6a5dSKent Overstreet s = kzalloc(sizeof(*s), GFP_NOFS|gfp); 303f57a6a5dSKent Overstreet if (!s) 304f57a6a5dSKent Overstreet return NULL; 305f57a6a5dSKent Overstreet 3063826ee0bSKent Overstreet spin_lock_init(&s->lock); 307f57a6a5dSKent Overstreet /* 308f57a6a5dSKent Overstreet * migrate_page_move_mapping() assumes that pages with private data 309f57a6a5dSKent Overstreet * have their count elevated by 1. 310f57a6a5dSKent Overstreet */ 311f57a6a5dSKent Overstreet get_page(page); 312f57a6a5dSKent Overstreet set_page_private(page, (unsigned long) s); 3131c6fdbd8SKent Overstreet SetPagePrivate(page); 3141c6fdbd8SKent Overstreet return s; 3151c6fdbd8SKent Overstreet } 3161c6fdbd8SKent Overstreet 317f57a6a5dSKent Overstreet static struct bch_page_state *bch2_page_state_create(struct page *page, 318f57a6a5dSKent Overstreet gfp_t gfp) 319f57a6a5dSKent Overstreet { 320f57a6a5dSKent Overstreet return bch2_page_state(page) ?: __bch2_page_state_create(page, gfp); 321f57a6a5dSKent Overstreet } 322f57a6a5dSKent Overstreet 323e1036a2aSKent Overstreet static inline unsigned inode_nr_replicas(struct bch_fs *c, struct bch_inode_info *inode) 324e1036a2aSKent Overstreet { 325e1036a2aSKent Overstreet /* XXX: this should not be open coded */ 326e1036a2aSKent Overstreet return inode->ei_inode.bi_data_replicas 327e1036a2aSKent Overstreet ? inode->ei_inode.bi_data_replicas - 1 328e1036a2aSKent Overstreet : c->opts.data_replicas; 329e1036a2aSKent Overstreet } 330e1036a2aSKent Overstreet 331f57a6a5dSKent Overstreet static inline unsigned sectors_to_reserve(struct bch_page_sector *s, 332f57a6a5dSKent Overstreet unsigned nr_replicas) 333f57a6a5dSKent Overstreet { 334f57a6a5dSKent Overstreet return max(0, (int) nr_replicas - 335f57a6a5dSKent Overstreet s->nr_replicas - 336f57a6a5dSKent Overstreet s->replicas_reserved); 337f57a6a5dSKent Overstreet } 338f57a6a5dSKent Overstreet 339f57a6a5dSKent Overstreet static int bch2_get_page_disk_reservation(struct bch_fs *c, 340f57a6a5dSKent Overstreet struct bch_inode_info *inode, 3411c6fdbd8SKent Overstreet struct page *page, bool check_enospc) 3421c6fdbd8SKent Overstreet { 343f57a6a5dSKent Overstreet struct bch_page_state *s = bch2_page_state_create(page, 0); 344e1036a2aSKent Overstreet unsigned nr_replicas = inode_nr_replicas(c, inode); 345f57a6a5dSKent Overstreet struct disk_reservation disk_res = { 0 }; 346f57a6a5dSKent Overstreet unsigned i, disk_res_sectors = 0; 347f81b648dSKent Overstreet int ret; 3481c6fdbd8SKent Overstreet 349f57a6a5dSKent Overstreet if (!s) 350f57a6a5dSKent Overstreet return -ENOMEM; 3511c6fdbd8SKent Overstreet 352f57a6a5dSKent Overstreet for (i = 0; i < ARRAY_SIZE(s->s); i++) 353f57a6a5dSKent Overstreet disk_res_sectors += sectors_to_reserve(&s->s[i], nr_replicas); 354f57a6a5dSKent Overstreet 355f57a6a5dSKent Overstreet if (!disk_res_sectors) 356f57a6a5dSKent Overstreet return 0; 357f57a6a5dSKent Overstreet 358f57a6a5dSKent Overstreet ret = bch2_disk_reservation_get(c, &disk_res, 359f57a6a5dSKent Overstreet disk_res_sectors, 1, 360f57a6a5dSKent Overstreet !check_enospc 361f57a6a5dSKent Overstreet ? BCH_DISK_RESERVATION_NOFAIL 362f57a6a5dSKent Overstreet : 0); 3631c6fdbd8SKent Overstreet if (unlikely(ret)) 364f81b648dSKent Overstreet return ret; 365f81b648dSKent Overstreet 366f57a6a5dSKent Overstreet for (i = 0; i < ARRAY_SIZE(s->s); i++) 367f57a6a5dSKent Overstreet s->s[i].replicas_reserved += 368f57a6a5dSKent Overstreet sectors_to_reserve(&s->s[i], nr_replicas); 369f57a6a5dSKent Overstreet 370f57a6a5dSKent Overstreet return 0; 3711c6fdbd8SKent Overstreet } 3721c6fdbd8SKent Overstreet 373d1542e03SKent Overstreet struct bch2_page_reservation { 374d1542e03SKent Overstreet struct disk_reservation disk; 375d1542e03SKent Overstreet struct quota_res quota; 376d1542e03SKent Overstreet }; 377d1542e03SKent Overstreet 378d1542e03SKent Overstreet static void bch2_page_reservation_init(struct bch_fs *c, 379f57a6a5dSKent Overstreet struct bch_inode_info *inode, 380d1542e03SKent Overstreet struct bch2_page_reservation *res) 381d1542e03SKent Overstreet { 382d1542e03SKent Overstreet memset(res, 0, sizeof(*res)); 383d1542e03SKent Overstreet 384d1542e03SKent Overstreet res->disk.nr_replicas = inode_nr_replicas(c, inode); 385d1542e03SKent Overstreet } 386d1542e03SKent Overstreet 387d1542e03SKent Overstreet static void bch2_page_reservation_put(struct bch_fs *c, 388d1542e03SKent Overstreet struct bch_inode_info *inode, 389d1542e03SKent Overstreet struct bch2_page_reservation *res) 390d1542e03SKent Overstreet { 391d1542e03SKent Overstreet bch2_disk_reservation_put(c, &res->disk); 392d1542e03SKent Overstreet bch2_quota_reservation_put(c, inode, &res->quota); 393d1542e03SKent Overstreet } 394d1542e03SKent Overstreet 395d1542e03SKent Overstreet static int bch2_page_reservation_get(struct bch_fs *c, 396d1542e03SKent Overstreet struct bch_inode_info *inode, struct page *page, 397d1542e03SKent Overstreet struct bch2_page_reservation *res, 398d1542e03SKent Overstreet unsigned offset, unsigned len, bool check_enospc) 399f57a6a5dSKent Overstreet { 400f57a6a5dSKent Overstreet struct bch_page_state *s = bch2_page_state_create(page, 0); 401d1542e03SKent Overstreet unsigned i, disk_sectors = 0, quota_sectors = 0; 402f57a6a5dSKent Overstreet int ret; 403f57a6a5dSKent Overstreet 404f57a6a5dSKent Overstreet if (!s) 405f57a6a5dSKent Overstreet return -ENOMEM; 406f57a6a5dSKent Overstreet 4074b0a66d5SKent Overstreet for (i = round_down(offset, block_bytes(c)) >> 9; 4084b0a66d5SKent Overstreet i < round_up(offset + len, block_bytes(c)) >> 9; 409d1542e03SKent Overstreet i++) { 410d1542e03SKent Overstreet disk_sectors += sectors_to_reserve(&s->s[i], 411d1542e03SKent Overstreet res->disk.nr_replicas); 412d1542e03SKent Overstreet quota_sectors += s->s[i].state == SECTOR_UNALLOCATED; 4131c6fdbd8SKent Overstreet } 4141c6fdbd8SKent Overstreet 415d1542e03SKent Overstreet if (disk_sectors) { 416d1542e03SKent Overstreet ret = bch2_disk_reservation_add(c, &res->disk, 417d1542e03SKent Overstreet disk_sectors, 418d1542e03SKent Overstreet !check_enospc 419d1542e03SKent Overstreet ? BCH_DISK_RESERVATION_NOFAIL 420d1542e03SKent Overstreet : 0); 421d1542e03SKent Overstreet if (unlikely(ret)) 422d1542e03SKent Overstreet return ret; 423d1542e03SKent Overstreet } 424d1542e03SKent Overstreet 425d1542e03SKent Overstreet if (quota_sectors) { 426d1542e03SKent Overstreet ret = bch2_quota_reservation_add(c, inode, &res->quota, 427d1542e03SKent Overstreet quota_sectors, 428d1542e03SKent Overstreet check_enospc); 429d1542e03SKent Overstreet if (unlikely(ret)) { 430d1542e03SKent Overstreet struct disk_reservation tmp = { 431d1542e03SKent Overstreet .sectors = disk_sectors 432d1542e03SKent Overstreet }; 433d1542e03SKent Overstreet 434d1542e03SKent Overstreet bch2_disk_reservation_put(c, &tmp); 435d1542e03SKent Overstreet res->disk.sectors -= disk_sectors; 436d1542e03SKent Overstreet return ret; 437d1542e03SKent Overstreet } 438d1542e03SKent Overstreet } 439d1542e03SKent Overstreet 440d1542e03SKent Overstreet return 0; 441f57a6a5dSKent Overstreet } 442f57a6a5dSKent Overstreet 4431c6fdbd8SKent Overstreet static void bch2_clear_page_bits(struct page *page) 4441c6fdbd8SKent Overstreet { 4451c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(page->mapping->host); 4461c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 447f57a6a5dSKent Overstreet struct bch_page_state *s = bch2_page_state(page); 448d1542e03SKent Overstreet struct disk_reservation disk_res = { 0 }; 449f57a6a5dSKent Overstreet int i, dirty_sectors = 0; 4501c6fdbd8SKent Overstreet 451f57a6a5dSKent Overstreet if (!s) 4521c6fdbd8SKent Overstreet return; 4531c6fdbd8SKent Overstreet 4543826ee0bSKent Overstreet EBUG_ON(!PageLocked(page)); 4553826ee0bSKent Overstreet EBUG_ON(PageWriteback(page)); 4563826ee0bSKent Overstreet 457f57a6a5dSKent Overstreet for (i = 0; i < ARRAY_SIZE(s->s); i++) { 458d1542e03SKent Overstreet disk_res.sectors += s->s[i].replicas_reserved; 459d1542e03SKent Overstreet s->s[i].replicas_reserved = 0; 460d1542e03SKent Overstreet 461f57a6a5dSKent Overstreet if (s->s[i].state == SECTOR_DIRTY) { 462f57a6a5dSKent Overstreet dirty_sectors++; 463f57a6a5dSKent Overstreet s->s[i].state = SECTOR_UNALLOCATED; 464f57a6a5dSKent Overstreet } 465f57a6a5dSKent Overstreet } 466adfcfaf0SKent Overstreet 467d1542e03SKent Overstreet bch2_disk_reservation_put(c, &disk_res); 468d1542e03SKent Overstreet 469f57a6a5dSKent Overstreet if (dirty_sectors) 470f57a6a5dSKent Overstreet i_sectors_acct(c, inode, NULL, -dirty_sectors); 471adfcfaf0SKent Overstreet 472f57a6a5dSKent Overstreet bch2_page_state_release(page); 4731c6fdbd8SKent Overstreet } 4741c6fdbd8SKent Overstreet 475d1542e03SKent Overstreet static void bch2_set_page_dirty(struct bch_fs *c, 476d1542e03SKent Overstreet struct bch_inode_info *inode, struct page *page, 477d1542e03SKent Overstreet struct bch2_page_reservation *res, 478d1542e03SKent Overstreet unsigned offset, unsigned len) 4791c6fdbd8SKent Overstreet { 480d1542e03SKent Overstreet struct bch_page_state *s = bch2_page_state(page); 481f57a6a5dSKent Overstreet unsigned i, dirty_sectors = 0; 4821c6fdbd8SKent Overstreet 483877dfb34SKent Overstreet WARN_ON((u64) page_offset(page) + offset + len > 484877dfb34SKent Overstreet round_up((u64) i_size_read(&inode->v), block_bytes(c))); 485fb472ac5SKent Overstreet 4863826ee0bSKent Overstreet spin_lock(&s->lock); 4873826ee0bSKent Overstreet 4884b0a66d5SKent Overstreet for (i = round_down(offset, block_bytes(c)) >> 9; 4894b0a66d5SKent Overstreet i < round_up(offset + len, block_bytes(c)) >> 9; 490d1542e03SKent Overstreet i++) { 491d1542e03SKent Overstreet unsigned sectors = sectors_to_reserve(&s->s[i], 492d1542e03SKent Overstreet res->disk.nr_replicas); 4931c6fdbd8SKent Overstreet 494406d6d5aSKent Overstreet /* 495406d6d5aSKent Overstreet * This can happen if we race with the error path in 496406d6d5aSKent Overstreet * bch2_writepage_io_done(): 497406d6d5aSKent Overstreet */ 498406d6d5aSKent Overstreet sectors = min_t(unsigned, sectors, res->disk.sectors); 499406d6d5aSKent Overstreet 500d1542e03SKent Overstreet s->s[i].replicas_reserved += sectors; 501d1542e03SKent Overstreet res->disk.sectors -= sectors; 502adfcfaf0SKent Overstreet 5032ba5d38bSKent Overstreet if (s->s[i].state == SECTOR_UNALLOCATED) 504f57a6a5dSKent Overstreet dirty_sectors++; 5052ba5d38bSKent Overstreet 5062ba5d38bSKent Overstreet s->s[i].state = max_t(unsigned, s->s[i].state, SECTOR_DIRTY); 507f57a6a5dSKent Overstreet } 508f57a6a5dSKent Overstreet 5093826ee0bSKent Overstreet spin_unlock(&s->lock); 5103826ee0bSKent Overstreet 511f57a6a5dSKent Overstreet if (dirty_sectors) 512d1542e03SKent Overstreet i_sectors_acct(c, inode, &res->quota, dirty_sectors); 5131c6fdbd8SKent Overstreet 514d1542e03SKent Overstreet if (!PageDirty(page)) 515d1542e03SKent Overstreet filemap_dirty_folio(inode->v.i_mapping, page_folio(page)); 5161c6fdbd8SKent Overstreet } 5171c6fdbd8SKent Overstreet 5181c6fdbd8SKent Overstreet vm_fault_t bch2_page_fault(struct vm_fault *vmf) 5191c6fdbd8SKent Overstreet { 5201c6fdbd8SKent Overstreet struct file *file = vmf->vma->vm_file; 5211c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 5221c6fdbd8SKent Overstreet int ret; 5231c6fdbd8SKent Overstreet 5241c6fdbd8SKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 5251c6fdbd8SKent Overstreet ret = filemap_fault(vmf); 5261c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 5271c6fdbd8SKent Overstreet 5281c6fdbd8SKent Overstreet return ret; 5291c6fdbd8SKent Overstreet } 5301c6fdbd8SKent Overstreet 5311c6fdbd8SKent Overstreet vm_fault_t bch2_page_mkwrite(struct vm_fault *vmf) 5321c6fdbd8SKent Overstreet { 5331c6fdbd8SKent Overstreet struct page *page = vmf->page; 5341c6fdbd8SKent Overstreet struct file *file = vmf->vma->vm_file; 5351c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 5361c6fdbd8SKent Overstreet struct address_space *mapping = file->f_mapping; 5371c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 538d1542e03SKent Overstreet struct bch2_page_reservation res; 5396cc3535dSKent Overstreet unsigned len; 5406cc3535dSKent Overstreet loff_t isize; 5411c6fdbd8SKent Overstreet int ret = VM_FAULT_LOCKED; 5421c6fdbd8SKent Overstreet 543d1542e03SKent Overstreet bch2_page_reservation_init(c, inode, &res); 544d1542e03SKent Overstreet 5451c6fdbd8SKent Overstreet sb_start_pagefault(inode->v.i_sb); 5461c6fdbd8SKent Overstreet file_update_time(file); 5471c6fdbd8SKent Overstreet 5481c6fdbd8SKent Overstreet /* 5491c6fdbd8SKent Overstreet * Not strictly necessary, but helps avoid dio writes livelocking in 5501c6fdbd8SKent Overstreet * write_invalidate_inode_pages_range() - can drop this if/when we get 5511c6fdbd8SKent Overstreet * a write_invalidate_inode_pages_range() that works without dropping 5521c6fdbd8SKent Overstreet * page lock before invalidating page 5531c6fdbd8SKent Overstreet */ 5541c6fdbd8SKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 5551c6fdbd8SKent Overstreet 5561c6fdbd8SKent Overstreet lock_page(page); 5576cc3535dSKent Overstreet isize = i_size_read(&inode->v); 5586cc3535dSKent Overstreet 5596cc3535dSKent Overstreet if (page->mapping != mapping || page_offset(page) >= isize) { 5601c6fdbd8SKent Overstreet unlock_page(page); 5611c6fdbd8SKent Overstreet ret = VM_FAULT_NOPAGE; 5621c6fdbd8SKent Overstreet goto out; 5631c6fdbd8SKent Overstreet } 5641c6fdbd8SKent Overstreet 565d55460bbSKent Overstreet len = min_t(loff_t, PAGE_SIZE, isize - page_offset(page)); 5666cc3535dSKent Overstreet 5676cc3535dSKent Overstreet if (bch2_page_reservation_get(c, inode, page, &res, 0, len, true)) { 5681c6fdbd8SKent Overstreet unlock_page(page); 5691c6fdbd8SKent Overstreet ret = VM_FAULT_SIGBUS; 5701c6fdbd8SKent Overstreet goto out; 5711c6fdbd8SKent Overstreet } 5721c6fdbd8SKent Overstreet 5736cc3535dSKent Overstreet bch2_set_page_dirty(c, inode, page, &res, 0, len); 5741b783a69SKent Overstreet bch2_page_reservation_put(c, inode, &res); 5751b783a69SKent Overstreet 5761c6fdbd8SKent Overstreet wait_for_stable_page(page); 5771c6fdbd8SKent Overstreet out: 5781c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 5791c6fdbd8SKent Overstreet sb_end_pagefault(inode->v.i_sb); 580d1542e03SKent Overstreet 5811c6fdbd8SKent Overstreet return ret; 5821c6fdbd8SKent Overstreet } 5831c6fdbd8SKent Overstreet 5841c6fdbd8SKent Overstreet void bch2_invalidate_folio(struct folio *folio, size_t offset, size_t length) 5851c6fdbd8SKent Overstreet { 5861c6fdbd8SKent Overstreet if (offset || length < folio_size(folio)) 5871c6fdbd8SKent Overstreet return; 5881c6fdbd8SKent Overstreet 5891c6fdbd8SKent Overstreet bch2_clear_page_bits(&folio->page); 5901c6fdbd8SKent Overstreet } 5911c6fdbd8SKent Overstreet 5921c6fdbd8SKent Overstreet bool bch2_release_folio(struct folio *folio, gfp_t gfp_mask) 5931c6fdbd8SKent Overstreet { 594a6d90385SKent Overstreet if (folio_test_dirty(folio) || folio_test_writeback(folio)) 5951c6fdbd8SKent Overstreet return false; 5961c6fdbd8SKent Overstreet 5971c6fdbd8SKent Overstreet bch2_clear_page_bits(&folio->page); 5981c6fdbd8SKent Overstreet return true; 5991c6fdbd8SKent Overstreet } 6001c6fdbd8SKent Overstreet 6011c6fdbd8SKent Overstreet /* readpage(s): */ 6021c6fdbd8SKent Overstreet 6031c6fdbd8SKent Overstreet static void bch2_readpages_end_io(struct bio *bio) 6041c6fdbd8SKent Overstreet { 6051c6fdbd8SKent Overstreet struct bvec_iter_all iter; 6061c6fdbd8SKent Overstreet struct bio_vec *bv; 6071c6fdbd8SKent Overstreet 6081c6fdbd8SKent Overstreet bio_for_each_segment_all(bv, bio, iter) { 6091c6fdbd8SKent Overstreet struct page *page = bv->bv_page; 6101c6fdbd8SKent Overstreet 6111c6fdbd8SKent Overstreet if (!bio->bi_status) { 6121c6fdbd8SKent Overstreet SetPageUptodate(page); 6131c6fdbd8SKent Overstreet } else { 6141c6fdbd8SKent Overstreet ClearPageUptodate(page); 6151c6fdbd8SKent Overstreet SetPageError(page); 6161c6fdbd8SKent Overstreet } 6171c6fdbd8SKent Overstreet unlock_page(page); 6181c6fdbd8SKent Overstreet } 6191c6fdbd8SKent Overstreet 6201c6fdbd8SKent Overstreet bio_put(bio); 6211c6fdbd8SKent Overstreet } 6221c6fdbd8SKent Overstreet 6231c6fdbd8SKent Overstreet static inline void page_state_init_for_read(struct page *page) 6241c6fdbd8SKent Overstreet { 625f81b648dSKent Overstreet SetPagePrivate(page); 626f81b648dSKent Overstreet page->private = 0; 6271c6fdbd8SKent Overstreet } 6281c6fdbd8SKent Overstreet 6291c6fdbd8SKent Overstreet struct readpages_iter { 6301c6fdbd8SKent Overstreet struct address_space *mapping; 6311c6fdbd8SKent Overstreet struct page **pages; 6321c6fdbd8SKent Overstreet unsigned nr_pages; 6331c6fdbd8SKent Overstreet unsigned idx; 6341c6fdbd8SKent Overstreet pgoff_t offset; 6351c6fdbd8SKent Overstreet }; 6361c6fdbd8SKent Overstreet 6371c6fdbd8SKent Overstreet static int readpages_iter_init(struct readpages_iter *iter, 6381c6fdbd8SKent Overstreet struct readahead_control *ractl) 6391c6fdbd8SKent Overstreet { 6401c6fdbd8SKent Overstreet unsigned i, nr_pages = readahead_count(ractl); 6411c6fdbd8SKent Overstreet 6421c6fdbd8SKent Overstreet memset(iter, 0, sizeof(*iter)); 6431c6fdbd8SKent Overstreet 6441c6fdbd8SKent Overstreet iter->mapping = ractl->mapping; 6451c6fdbd8SKent Overstreet iter->offset = readahead_index(ractl); 6461c6fdbd8SKent Overstreet iter->nr_pages = nr_pages; 6471c6fdbd8SKent Overstreet 6481c6fdbd8SKent Overstreet iter->pages = kmalloc_array(nr_pages, sizeof(struct page *), GFP_NOFS); 6491c6fdbd8SKent Overstreet if (!iter->pages) 6501c6fdbd8SKent Overstreet return -ENOMEM; 6511c6fdbd8SKent Overstreet 6521c6fdbd8SKent Overstreet __readahead_batch(ractl, iter->pages, nr_pages); 6531c6fdbd8SKent Overstreet for (i = 0; i < nr_pages; i++) { 654f57a6a5dSKent Overstreet __bch2_page_state_create(iter->pages[i], __GFP_NOFAIL); 6551c6fdbd8SKent Overstreet put_page(iter->pages[i]); 6561c6fdbd8SKent Overstreet } 6571c6fdbd8SKent Overstreet 6581c6fdbd8SKent Overstreet return 0; 6591c6fdbd8SKent Overstreet } 6601c6fdbd8SKent Overstreet 6611c6fdbd8SKent Overstreet static inline struct page *readpage_iter_next(struct readpages_iter *iter) 6621c6fdbd8SKent Overstreet { 6631c6fdbd8SKent Overstreet if (iter->idx >= iter->nr_pages) 6641c6fdbd8SKent Overstreet return NULL; 6651c6fdbd8SKent Overstreet 6661c6fdbd8SKent Overstreet EBUG_ON(iter->pages[iter->idx]->index != iter->offset + iter->idx); 6671c6fdbd8SKent Overstreet 6681c6fdbd8SKent Overstreet return iter->pages[iter->idx]; 6691c6fdbd8SKent Overstreet } 6701c6fdbd8SKent Overstreet 6711c6fdbd8SKent Overstreet static void bch2_add_page_sectors(struct bio *bio, struct bkey_s_c k) 6721c6fdbd8SKent Overstreet { 6731c6fdbd8SKent Overstreet struct bvec_iter iter; 6741c6fdbd8SKent Overstreet struct bio_vec bv; 67576426098SKent Overstreet unsigned nr_ptrs = k.k->type == KEY_TYPE_reflink_v 67676426098SKent Overstreet ? 0 : bch2_bkey_nr_ptrs_allocated(k); 6772ba5d38bSKent Overstreet unsigned state = k.k->type == KEY_TYPE_reservation 6782ba5d38bSKent Overstreet ? SECTOR_RESERVED 6792ba5d38bSKent Overstreet : SECTOR_ALLOCATED; 6801c6fdbd8SKent Overstreet 6811c6fdbd8SKent Overstreet bio_for_each_segment(bv, bio, iter) { 682f57a6a5dSKent Overstreet struct bch_page_state *s = bch2_page_state(bv.bv_page); 683f57a6a5dSKent Overstreet unsigned i; 684f81b648dSKent Overstreet 685f57a6a5dSKent Overstreet for (i = bv.bv_offset >> 9; 686f57a6a5dSKent Overstreet i < (bv.bv_offset + bv.bv_len) >> 9; 687f57a6a5dSKent Overstreet i++) { 688f57a6a5dSKent Overstreet s->s[i].nr_replicas = nr_ptrs; 6892ba5d38bSKent Overstreet s->s[i].state = state; 690f57a6a5dSKent Overstreet } 6911c6fdbd8SKent Overstreet } 6921c6fdbd8SKent Overstreet } 6931c6fdbd8SKent Overstreet 6941c6fdbd8SKent Overstreet static void readpage_bio_extend(struct readpages_iter *iter, 69576426098SKent Overstreet struct bio *bio, 69676426098SKent Overstreet unsigned sectors_this_extent, 6971c6fdbd8SKent Overstreet bool get_more) 6981c6fdbd8SKent Overstreet { 69976426098SKent Overstreet while (bio_sectors(bio) < sectors_this_extent && 7001c6fdbd8SKent Overstreet bio->bi_vcnt < bio->bi_max_vecs) { 7011c6fdbd8SKent Overstreet pgoff_t page_offset = bio_end_sector(bio) >> PAGE_SECTOR_SHIFT; 7021c6fdbd8SKent Overstreet struct page *page = readpage_iter_next(iter); 7031c6fdbd8SKent Overstreet int ret; 7041c6fdbd8SKent Overstreet 7051c6fdbd8SKent Overstreet if (page) { 7061c6fdbd8SKent Overstreet if (iter->offset + iter->idx != page_offset) 7071c6fdbd8SKent Overstreet break; 7081c6fdbd8SKent Overstreet 7091c6fdbd8SKent Overstreet iter->idx++; 7101c6fdbd8SKent Overstreet } else { 7111c6fdbd8SKent Overstreet if (!get_more) 7121c6fdbd8SKent Overstreet break; 7131c6fdbd8SKent Overstreet 7141c6fdbd8SKent Overstreet page = xa_load(&iter->mapping->i_pages, page_offset); 7151c6fdbd8SKent Overstreet if (page && !xa_is_value(page)) 7161c6fdbd8SKent Overstreet break; 7171c6fdbd8SKent Overstreet 7181c6fdbd8SKent Overstreet page = __page_cache_alloc(readahead_gfp_mask(iter->mapping)); 7191c6fdbd8SKent Overstreet if (!page) 7201c6fdbd8SKent Overstreet break; 7211c6fdbd8SKent Overstreet 722f57a6a5dSKent Overstreet if (!__bch2_page_state_create(page, 0)) { 723f57a6a5dSKent Overstreet put_page(page); 724f57a6a5dSKent Overstreet break; 725f57a6a5dSKent Overstreet } 7261c6fdbd8SKent Overstreet 7271c6fdbd8SKent Overstreet ret = add_to_page_cache_lru(page, iter->mapping, 7281c6fdbd8SKent Overstreet page_offset, GFP_NOFS); 7291c6fdbd8SKent Overstreet if (ret) { 730f57a6a5dSKent Overstreet __bch2_page_state_release(page); 7311c6fdbd8SKent Overstreet put_page(page); 7321c6fdbd8SKent Overstreet break; 7331c6fdbd8SKent Overstreet } 7341c6fdbd8SKent Overstreet 7351c6fdbd8SKent Overstreet put_page(page); 7361c6fdbd8SKent Overstreet } 7371c6fdbd8SKent Overstreet 738885678f6SKent Overstreet BUG_ON(!bio_add_page(bio, page, PAGE_SIZE, 0)); 7391c6fdbd8SKent Overstreet } 7401c6fdbd8SKent Overstreet } 7411c6fdbd8SKent Overstreet 7420f238367SKent Overstreet static void bchfs_read(struct btree_trans *trans, struct btree_iter *iter, 7431c6fdbd8SKent Overstreet struct bch_read_bio *rbio, u64 inum, 7441c6fdbd8SKent Overstreet struct readpages_iter *readpages_iter) 7451c6fdbd8SKent Overstreet { 7460f238367SKent Overstreet struct bch_fs *c = trans->c; 7471c6fdbd8SKent Overstreet int flags = BCH_READ_RETRY_IF_STALE| 7481c6fdbd8SKent Overstreet BCH_READ_MAY_PROMOTE; 74976426098SKent Overstreet int ret = 0; 7501c6fdbd8SKent Overstreet 7511c6fdbd8SKent Overstreet rbio->c = c; 7521c6fdbd8SKent Overstreet rbio->start_time = local_clock(); 75376426098SKent Overstreet retry: 7541c6fdbd8SKent Overstreet while (1) { 7551c6fdbd8SKent Overstreet BKEY_PADDED(k) tmp; 7561c6fdbd8SKent Overstreet struct bkey_s_c k; 75776426098SKent Overstreet unsigned bytes, sectors, offset_into_extent; 7581c6fdbd8SKent Overstreet 75906ed8558SKent Overstreet bch2_btree_iter_set_pos(iter, 76006ed8558SKent Overstreet POS(inum, rbio->bio.bi_iter.bi_sector)); 7611c6fdbd8SKent Overstreet 7621c6fdbd8SKent Overstreet k = bch2_btree_iter_peek_slot(iter); 76376426098SKent Overstreet ret = bkey_err(k); 76476426098SKent Overstreet if (ret) 76576426098SKent Overstreet break; 7661c6fdbd8SKent Overstreet 7671c6fdbd8SKent Overstreet bkey_reassemble(&tmp.k, k); 7681c6fdbd8SKent Overstreet k = bkey_i_to_s_c(&tmp.k); 7691c6fdbd8SKent Overstreet 77006ed8558SKent Overstreet offset_into_extent = iter->pos.offset - 77106ed8558SKent Overstreet bkey_start_offset(k.k); 77276426098SKent Overstreet sectors = k.k->size - offset_into_extent; 77376426098SKent Overstreet 7743fb5ebcdSKent Overstreet ret = bch2_read_indirect_extent(trans, 77576426098SKent Overstreet &offset_into_extent, &tmp.k); 77676426098SKent Overstreet if (ret) 77776426098SKent Overstreet break; 77876426098SKent Overstreet 77976426098SKent Overstreet sectors = min(sectors, k.k->size - offset_into_extent); 78076426098SKent Overstreet 78176426098SKent Overstreet bch2_trans_unlock(trans); 78206ed8558SKent Overstreet 7831c6fdbd8SKent Overstreet if (readpages_iter) { 7841c6fdbd8SKent Overstreet bool want_full_extent = false; 7851c6fdbd8SKent Overstreet 7861c6fdbd8SKent Overstreet if (bkey_extent_is_data(k.k)) { 78799aaf570SKent Overstreet struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k); 7881c6fdbd8SKent Overstreet const union bch_extent_entry *i; 7891742237bSKent Overstreet struct extent_ptr_decoded p; 7901c6fdbd8SKent Overstreet 79199aaf570SKent Overstreet bkey_for_each_ptr_decode(k.k, ptrs, p, i) 7921742237bSKent Overstreet want_full_extent |= ((p.crc.csum_type != 0) | 7931742237bSKent Overstreet (p.crc.compression_type != 0)); 7941c6fdbd8SKent Overstreet } 7951c6fdbd8SKent Overstreet 79676426098SKent Overstreet readpage_bio_extend(readpages_iter, &rbio->bio, 79776426098SKent Overstreet sectors, want_full_extent); 7981c6fdbd8SKent Overstreet } 7991c6fdbd8SKent Overstreet 80076426098SKent Overstreet bytes = min(sectors, bio_sectors(&rbio->bio)) << 9; 80106ed8558SKent Overstreet swap(rbio->bio.bi_iter.bi_size, bytes); 8021c6fdbd8SKent Overstreet 80306ed8558SKent Overstreet if (rbio->bio.bi_iter.bi_size == bytes) 8041c6fdbd8SKent Overstreet flags |= BCH_READ_LAST_FRAGMENT; 8051c6fdbd8SKent Overstreet 8061c6fdbd8SKent Overstreet if (bkey_extent_is_allocation(k.k)) 80706ed8558SKent Overstreet bch2_add_page_sectors(&rbio->bio, k); 8081c6fdbd8SKent Overstreet 80906ed8558SKent Overstreet bch2_read_extent(c, rbio, k, offset_into_extent, flags); 8101c6fdbd8SKent Overstreet 8111c6fdbd8SKent Overstreet if (flags & BCH_READ_LAST_FRAGMENT) 8121c6fdbd8SKent Overstreet return; 8131c6fdbd8SKent Overstreet 81406ed8558SKent Overstreet swap(rbio->bio.bi_iter.bi_size, bytes); 81506ed8558SKent Overstreet bio_advance(&rbio->bio, bytes); 8161c6fdbd8SKent Overstreet } 81776426098SKent Overstreet 81876426098SKent Overstreet if (ret == -EINTR) 81976426098SKent Overstreet goto retry; 82076426098SKent Overstreet 82176426098SKent Overstreet bcache_io_error(c, &rbio->bio, "btree IO error %i", ret); 82276426098SKent Overstreet bio_endio(&rbio->bio); 8231c6fdbd8SKent Overstreet } 8241c6fdbd8SKent Overstreet 8251c6fdbd8SKent Overstreet void bch2_readahead(struct readahead_control *ractl) 8261c6fdbd8SKent Overstreet { 8271c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(ractl->mapping->host); 8281c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 8299a3df993SKent Overstreet struct bch_io_opts opts = io_opts(c, &inode->ei_inode); 830424eb881SKent Overstreet struct btree_trans trans; 831424eb881SKent Overstreet struct btree_iter *iter; 8321c6fdbd8SKent Overstreet struct page *page; 8331c6fdbd8SKent Overstreet struct readpages_iter readpages_iter; 8341c6fdbd8SKent Overstreet int ret; 8351c6fdbd8SKent Overstreet 8361c6fdbd8SKent Overstreet ret = readpages_iter_init(&readpages_iter, ractl); 8371c6fdbd8SKent Overstreet BUG_ON(ret); 8381c6fdbd8SKent Overstreet 83920bceecbSKent Overstreet bch2_trans_init(&trans, c, 0, 0); 840424eb881SKent Overstreet 841424eb881SKent Overstreet iter = bch2_trans_get_iter(&trans, BTREE_ID_EXTENTS, POS_MIN, 8421c6fdbd8SKent Overstreet BTREE_ITER_SLOTS); 8431c6fdbd8SKent Overstreet 8441c6fdbd8SKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 8451c6fdbd8SKent Overstreet 8461c6fdbd8SKent Overstreet while ((page = readpage_iter_next(&readpages_iter))) { 8471c6fdbd8SKent Overstreet pgoff_t index = readpages_iter.offset + readpages_iter.idx; 8481c6fdbd8SKent Overstreet unsigned n = min_t(unsigned, 8491c6fdbd8SKent Overstreet readpages_iter.nr_pages - 8501c6fdbd8SKent Overstreet readpages_iter.idx, 8511c6fdbd8SKent Overstreet BIO_MAX_VECS); 8521c6fdbd8SKent Overstreet struct bch_read_bio *rbio = 8531c6fdbd8SKent Overstreet rbio_init(bio_alloc_bioset(NULL, n, REQ_OP_READ, 8541c6fdbd8SKent Overstreet GFP_NOFS, &c->bio_read), 8551c6fdbd8SKent Overstreet opts); 8561c6fdbd8SKent Overstreet 8571c6fdbd8SKent Overstreet readpages_iter.idx++; 8581c6fdbd8SKent Overstreet 8591c6fdbd8SKent Overstreet rbio->bio.bi_iter.bi_sector = (sector_t) index << PAGE_SECTOR_SHIFT; 8601c6fdbd8SKent Overstreet rbio->bio.bi_end_io = bch2_readpages_end_io; 861885678f6SKent Overstreet BUG_ON(!bio_add_page(&rbio->bio, page, PAGE_SIZE, 0)); 8621c6fdbd8SKent Overstreet 8630f238367SKent Overstreet bchfs_read(&trans, iter, rbio, inode->v.i_ino, 8640f238367SKent Overstreet &readpages_iter); 8651c6fdbd8SKent Overstreet } 8661c6fdbd8SKent Overstreet 8671c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 868424eb881SKent Overstreet 869424eb881SKent Overstreet bch2_trans_exit(&trans); 8701c6fdbd8SKent Overstreet kfree(readpages_iter.pages); 8711c6fdbd8SKent Overstreet } 8721c6fdbd8SKent Overstreet 8731c6fdbd8SKent Overstreet static void __bchfs_readpage(struct bch_fs *c, struct bch_read_bio *rbio, 8741c6fdbd8SKent Overstreet u64 inum, struct page *page) 8751c6fdbd8SKent Overstreet { 876424eb881SKent Overstreet struct btree_trans trans; 877424eb881SKent Overstreet struct btree_iter *iter; 8781c6fdbd8SKent Overstreet 879f57a6a5dSKent Overstreet bch2_page_state_create(page, __GFP_NOFAIL); 8801c6fdbd8SKent Overstreet 8811c6fdbd8SKent Overstreet rbio->bio.bi_opf = REQ_OP_READ|REQ_SYNC; 8827f5e31e1SKent Overstreet rbio->bio.bi_iter.bi_sector = 8837f5e31e1SKent Overstreet (sector_t) page->index << PAGE_SECTOR_SHIFT; 8847f5e31e1SKent Overstreet BUG_ON(!bio_add_page(&rbio->bio, page, PAGE_SIZE, 0)); 8851c6fdbd8SKent Overstreet 88620bceecbSKent Overstreet bch2_trans_init(&trans, c, 0, 0); 887424eb881SKent Overstreet iter = bch2_trans_get_iter(&trans, BTREE_ID_EXTENTS, POS_MIN, 8881c6fdbd8SKent Overstreet BTREE_ITER_SLOTS); 889424eb881SKent Overstreet 8900f238367SKent Overstreet bchfs_read(&trans, iter, rbio, inum, NULL); 891424eb881SKent Overstreet 892424eb881SKent Overstreet bch2_trans_exit(&trans); 8931c6fdbd8SKent Overstreet } 8941c6fdbd8SKent Overstreet 8951c6fdbd8SKent Overstreet static void bch2_read_single_page_end_io(struct bio *bio) 8961c6fdbd8SKent Overstreet { 8971c6fdbd8SKent Overstreet complete(bio->bi_private); 8981c6fdbd8SKent Overstreet } 8991c6fdbd8SKent Overstreet 9001c6fdbd8SKent Overstreet static int bch2_read_single_page(struct page *page, 9011c6fdbd8SKent Overstreet struct address_space *mapping) 9021c6fdbd8SKent Overstreet { 9031c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(mapping->host); 9041c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 9051c6fdbd8SKent Overstreet struct bch_read_bio *rbio; 9061c6fdbd8SKent Overstreet int ret; 9071c6fdbd8SKent Overstreet DECLARE_COMPLETION_ONSTACK(done); 9081c6fdbd8SKent Overstreet 9091c6fdbd8SKent Overstreet rbio = rbio_init(bio_alloc_bioset(NULL, 1, REQ_OP_READ, GFP_NOFS, &c->bio_read), 9109a3df993SKent Overstreet io_opts(c, &inode->ei_inode)); 9111c6fdbd8SKent Overstreet rbio->bio.bi_private = &done; 9121c6fdbd8SKent Overstreet rbio->bio.bi_end_io = bch2_read_single_page_end_io; 9131c6fdbd8SKent Overstreet 9141c6fdbd8SKent Overstreet __bchfs_readpage(c, rbio, inode->v.i_ino, page); 9151c6fdbd8SKent Overstreet wait_for_completion(&done); 9161c6fdbd8SKent Overstreet 9171c6fdbd8SKent Overstreet ret = blk_status_to_errno(rbio->bio.bi_status); 9181c6fdbd8SKent Overstreet bio_put(&rbio->bio); 9191c6fdbd8SKent Overstreet 9201c6fdbd8SKent Overstreet if (ret < 0) 9211c6fdbd8SKent Overstreet return ret; 9221c6fdbd8SKent Overstreet 9231c6fdbd8SKent Overstreet SetPageUptodate(page); 9241c6fdbd8SKent Overstreet return 0; 9251c6fdbd8SKent Overstreet } 9261c6fdbd8SKent Overstreet 9271c6fdbd8SKent Overstreet int bch2_read_folio(struct file *file, struct folio *folio) 9281c6fdbd8SKent Overstreet { 9291c6fdbd8SKent Overstreet struct page *page = &folio->page; 9301c6fdbd8SKent Overstreet int ret; 9311c6fdbd8SKent Overstreet 9321c6fdbd8SKent Overstreet ret = bch2_read_single_page(page, page->mapping); 9331c6fdbd8SKent Overstreet folio_unlock(folio); 9341c6fdbd8SKent Overstreet return ret; 9351c6fdbd8SKent Overstreet } 9361c6fdbd8SKent Overstreet 9371c6fdbd8SKent Overstreet /* writepages: */ 9381c6fdbd8SKent Overstreet 9391c6fdbd8SKent Overstreet struct bch_writepage_state { 9401c6fdbd8SKent Overstreet struct bch_writepage_io *io; 9411c6fdbd8SKent Overstreet struct bch_io_opts opts; 9421c6fdbd8SKent Overstreet }; 9431c6fdbd8SKent Overstreet 9441c6fdbd8SKent Overstreet static inline struct bch_writepage_state bch_writepage_state_init(struct bch_fs *c, 9451c6fdbd8SKent Overstreet struct bch_inode_info *inode) 9461c6fdbd8SKent Overstreet { 9479a3df993SKent Overstreet return (struct bch_writepage_state) { 9489a3df993SKent Overstreet .opts = io_opts(c, &inode->ei_inode) 9499a3df993SKent Overstreet }; 9501c6fdbd8SKent Overstreet } 9511c6fdbd8SKent Overstreet 9521c6fdbd8SKent Overstreet static void bch2_writepage_io_free(struct closure *cl) 9531c6fdbd8SKent Overstreet { 9541c6fdbd8SKent Overstreet struct bch_writepage_io *io = container_of(cl, 9551c6fdbd8SKent Overstreet struct bch_writepage_io, cl); 9561c6fdbd8SKent Overstreet 9579a3df993SKent Overstreet bio_put(&io->op.wbio.bio); 9581c6fdbd8SKent Overstreet } 9591c6fdbd8SKent Overstreet 9601c6fdbd8SKent Overstreet static void bch2_writepage_io_done(struct closure *cl) 9611c6fdbd8SKent Overstreet { 9621c6fdbd8SKent Overstreet struct bch_writepage_io *io = container_of(cl, 9631c6fdbd8SKent Overstreet struct bch_writepage_io, cl); 9649a3df993SKent Overstreet struct bch_fs *c = io->op.c; 9659a3df993SKent Overstreet struct bio *bio = &io->op.wbio.bio; 9661c6fdbd8SKent Overstreet struct bvec_iter_all iter; 9671c6fdbd8SKent Overstreet struct bio_vec *bvec; 968b3fce09cSKent Overstreet unsigned i; 9691c6fdbd8SKent Overstreet 9709a3df993SKent Overstreet if (io->op.error) { 97175812e70SKent Overstreet bio_for_each_segment_all(bvec, bio, iter) { 972b3fce09cSKent Overstreet struct bch_page_state *s; 973b3fce09cSKent Overstreet 9741c6fdbd8SKent Overstreet SetPageError(bvec->bv_page); 97575812e70SKent Overstreet mapping_set_error(bvec->bv_page->mapping, -EIO); 976b3fce09cSKent Overstreet 9773826ee0bSKent Overstreet s = __bch2_page_state(bvec->bv_page); 9783826ee0bSKent Overstreet spin_lock(&s->lock); 979b3fce09cSKent Overstreet for (i = 0; i < PAGE_SECTORS; i++) 980b3fce09cSKent Overstreet s->s[i].nr_replicas = 0; 9813826ee0bSKent Overstreet spin_unlock(&s->lock); 98275812e70SKent Overstreet } 9831c6fdbd8SKent Overstreet } 9841c6fdbd8SKent Overstreet 9851c6fdbd8SKent Overstreet /* 9861c6fdbd8SKent Overstreet * racing with fallocate can cause us to add fewer sectors than 9871c6fdbd8SKent Overstreet * expected - but we shouldn't add more sectors than expected: 9881c6fdbd8SKent Overstreet */ 9899a3df993SKent Overstreet BUG_ON(io->op.i_sectors_delta > 0); 9901c6fdbd8SKent Overstreet 9911c6fdbd8SKent Overstreet /* 9921c6fdbd8SKent Overstreet * (error (due to going RO) halfway through a page can screw that up 9931c6fdbd8SKent Overstreet * slightly) 9941c6fdbd8SKent Overstreet * XXX wtf? 9959a3df993SKent Overstreet BUG_ON(io->op.op.i_sectors_delta >= PAGE_SECTORS); 9961c6fdbd8SKent Overstreet */ 9971c6fdbd8SKent Overstreet 9981c6fdbd8SKent Overstreet /* 9991c6fdbd8SKent Overstreet * PageWriteback is effectively our ref on the inode - fixup i_blocks 10001c6fdbd8SKent Overstreet * before calling end_page_writeback: 10011c6fdbd8SKent Overstreet */ 10029a3df993SKent Overstreet i_sectors_acct(c, io->inode, NULL, io->op.i_sectors_delta); 10031c6fdbd8SKent Overstreet 10047f5e31e1SKent Overstreet bio_for_each_segment_all(bvec, bio, iter) { 10057f5e31e1SKent Overstreet struct bch_page_state *s = __bch2_page_state(bvec->bv_page); 10067f5e31e1SKent Overstreet 10077f5e31e1SKent Overstreet if (atomic_dec_and_test(&s->write_count)) 10081c6fdbd8SKent Overstreet end_page_writeback(bvec->bv_page); 10097f5e31e1SKent Overstreet } 10101c6fdbd8SKent Overstreet 10111c6fdbd8SKent Overstreet closure_return_with_destructor(&io->cl, bch2_writepage_io_free); 10121c6fdbd8SKent Overstreet } 10131c6fdbd8SKent Overstreet 10141c6fdbd8SKent Overstreet static void bch2_writepage_do_io(struct bch_writepage_state *w) 10151c6fdbd8SKent Overstreet { 10161c6fdbd8SKent Overstreet struct bch_writepage_io *io = w->io; 10171c6fdbd8SKent Overstreet 10181c6fdbd8SKent Overstreet w->io = NULL; 10199a3df993SKent Overstreet closure_call(&io->op.cl, bch2_write, NULL, &io->cl); 10201c6fdbd8SKent Overstreet continue_at(&io->cl, bch2_writepage_io_done, NULL); 10211c6fdbd8SKent Overstreet } 10221c6fdbd8SKent Overstreet 10231c6fdbd8SKent Overstreet /* 10241c6fdbd8SKent Overstreet * Get a bch_writepage_io and add @page to it - appending to an existing one if 10251c6fdbd8SKent Overstreet * possible, else allocating a new one: 10261c6fdbd8SKent Overstreet */ 10271c6fdbd8SKent Overstreet static void bch2_writepage_io_alloc(struct bch_fs *c, 10281c6fdbd8SKent Overstreet struct bch_writepage_state *w, 10291c6fdbd8SKent Overstreet struct bch_inode_info *inode, 10307f5e31e1SKent Overstreet u64 sector, 10311c6fdbd8SKent Overstreet unsigned nr_replicas) 10321c6fdbd8SKent Overstreet { 10331c6fdbd8SKent Overstreet struct bch_write_op *op; 10341c6fdbd8SKent Overstreet 10351c6fdbd8SKent Overstreet w->io = container_of(bio_alloc_bioset(NULL, BIO_MAX_VECS, 10361c6fdbd8SKent Overstreet REQ_OP_WRITE, 10371c6fdbd8SKent Overstreet GFP_NOFS, 10381c6fdbd8SKent Overstreet &c->writepage_bioset), 10399a3df993SKent Overstreet struct bch_writepage_io, op.wbio.bio); 10401c6fdbd8SKent Overstreet 10411c6fdbd8SKent Overstreet closure_init(&w->io->cl, NULL); 10429a3df993SKent Overstreet w->io->inode = inode; 10439a3df993SKent Overstreet 10449a3df993SKent Overstreet op = &w->io->op; 10459a3df993SKent Overstreet bch2_write_op_init(op, c, w->opts); 10469a3df993SKent Overstreet op->target = w->opts.foreground_target; 10479a3df993SKent Overstreet op_journal_seq_set(op, &inode->ei_journal_seq); 10481c6fdbd8SKent Overstreet op->nr_replicas = nr_replicas; 10491c6fdbd8SKent Overstreet op->res.nr_replicas = nr_replicas; 10501c6fdbd8SKent Overstreet op->write_point = writepoint_hashed(inode->ei_last_dirtied); 10517f5e31e1SKent Overstreet op->pos = POS(inode->v.i_ino, sector); 10527f5e31e1SKent Overstreet op->wbio.bio.bi_iter.bi_sector = sector; 10531c6fdbd8SKent Overstreet } 10541c6fdbd8SKent Overstreet 10551c6fdbd8SKent Overstreet static int __bch2_writepage(struct folio *folio, 10561c6fdbd8SKent Overstreet struct writeback_control *wbc, 10571c6fdbd8SKent Overstreet void *data) 10581c6fdbd8SKent Overstreet { 10591c6fdbd8SKent Overstreet struct page *page = &folio->page; 10601c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(page->mapping->host); 10611c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 10621c6fdbd8SKent Overstreet struct bch_writepage_state *w = data; 10637f5e31e1SKent Overstreet struct bch_page_state *s, orig; 10647f5e31e1SKent Overstreet unsigned i, offset, nr_replicas_this_write = U32_MAX; 10651c6fdbd8SKent Overstreet loff_t i_size = i_size_read(&inode->v); 10661c6fdbd8SKent Overstreet pgoff_t end_index = i_size >> PAGE_SHIFT; 1067e1036a2aSKent Overstreet int ret; 10681c6fdbd8SKent Overstreet 10691c6fdbd8SKent Overstreet EBUG_ON(!PageUptodate(page)); 10701c6fdbd8SKent Overstreet 10711c6fdbd8SKent Overstreet /* Is the page fully inside i_size? */ 10721c6fdbd8SKent Overstreet if (page->index < end_index) 10731c6fdbd8SKent Overstreet goto do_io; 10741c6fdbd8SKent Overstreet 10751c6fdbd8SKent Overstreet /* Is the page fully outside i_size? (truncate in progress) */ 10761c6fdbd8SKent Overstreet offset = i_size & (PAGE_SIZE - 1); 10771c6fdbd8SKent Overstreet if (page->index > end_index || !offset) { 10781c6fdbd8SKent Overstreet unlock_page(page); 10791c6fdbd8SKent Overstreet return 0; 10801c6fdbd8SKent Overstreet } 10811c6fdbd8SKent Overstreet 10821c6fdbd8SKent Overstreet /* 10831c6fdbd8SKent Overstreet * The page straddles i_size. It must be zeroed out on each and every 10841c6fdbd8SKent Overstreet * writepage invocation because it may be mmapped. "A file is mapped 10851c6fdbd8SKent Overstreet * in multiples of the page size. For a file that is not a multiple of 10861c6fdbd8SKent Overstreet * the page size, the remaining memory is zeroed when mapped, and 10871c6fdbd8SKent Overstreet * writes to that region are not written out to the file." 10881c6fdbd8SKent Overstreet */ 10891c6fdbd8SKent Overstreet zero_user_segment(page, offset, PAGE_SIZE); 10901c6fdbd8SKent Overstreet do_io: 1091f57a6a5dSKent Overstreet s = bch2_page_state_create(page, __GFP_NOFAIL); 1092f81b648dSKent Overstreet 1093f57a6a5dSKent Overstreet ret = bch2_get_page_disk_reservation(c, inode, page, true); 1094e1036a2aSKent Overstreet if (ret) { 1095e1036a2aSKent Overstreet SetPageError(page); 1096e1036a2aSKent Overstreet mapping_set_error(page->mapping, ret); 1097e1036a2aSKent Overstreet unlock_page(page); 1098e1036a2aSKent Overstreet return 0; 1099e1036a2aSKent Overstreet } 1100e1036a2aSKent Overstreet 11017f5e31e1SKent Overstreet /* Before unlocking the page, get copy of reservations: */ 11027f5e31e1SKent Overstreet orig = *s; 11037f5e31e1SKent Overstreet 11047f5e31e1SKent Overstreet for (i = 0; i < PAGE_SECTORS; i++) { 11052ba5d38bSKent Overstreet if (s->s[i].state < SECTOR_DIRTY) 11067f5e31e1SKent Overstreet continue; 11077f5e31e1SKent Overstreet 1108f81b648dSKent Overstreet nr_replicas_this_write = 1109f57a6a5dSKent Overstreet min_t(unsigned, nr_replicas_this_write, 1110f57a6a5dSKent Overstreet s->s[i].nr_replicas + 1111f57a6a5dSKent Overstreet s->s[i].replicas_reserved); 11127f5e31e1SKent Overstreet } 11131c6fdbd8SKent Overstreet 1114f57a6a5dSKent Overstreet for (i = 0; i < PAGE_SECTORS; i++) { 11152ba5d38bSKent Overstreet if (s->s[i].state < SECTOR_DIRTY) 11167f5e31e1SKent Overstreet continue; 11177f5e31e1SKent Overstreet 1118f57a6a5dSKent Overstreet s->s[i].nr_replicas = w->opts.compression 1119f57a6a5dSKent Overstreet ? 0 : nr_replicas_this_write; 1120e1036a2aSKent Overstreet 1121f57a6a5dSKent Overstreet s->s[i].replicas_reserved = 0; 1122f57a6a5dSKent Overstreet s->s[i].state = SECTOR_ALLOCATED; 1123f57a6a5dSKent Overstreet } 11241c6fdbd8SKent Overstreet 11257f5e31e1SKent Overstreet BUG_ON(atomic_read(&s->write_count)); 11267f5e31e1SKent Overstreet atomic_set(&s->write_count, 1); 11277f5e31e1SKent Overstreet 11281c6fdbd8SKent Overstreet BUG_ON(PageWriteback(page)); 11291c6fdbd8SKent Overstreet set_page_writeback(page); 11307f5e31e1SKent Overstreet 11311c6fdbd8SKent Overstreet unlock_page(page); 11321c6fdbd8SKent Overstreet 11337f5e31e1SKent Overstreet offset = 0; 11347f5e31e1SKent Overstreet while (1) { 11357f5e31e1SKent Overstreet unsigned sectors = 1, dirty_sectors = 0, reserved_sectors = 0; 11367f5e31e1SKent Overstreet u64 sector; 11377f5e31e1SKent Overstreet 11387f5e31e1SKent Overstreet while (offset < PAGE_SECTORS && 11392ba5d38bSKent Overstreet orig.s[offset].state < SECTOR_DIRTY) 11407f5e31e1SKent Overstreet offset++; 11417f5e31e1SKent Overstreet 11427f5e31e1SKent Overstreet if (offset == PAGE_SECTORS) 11437f5e31e1SKent Overstreet break; 11447f5e31e1SKent Overstreet 11457f5e31e1SKent Overstreet sector = ((u64) page->index << PAGE_SECTOR_SHIFT) + offset; 11467f5e31e1SKent Overstreet 11477f5e31e1SKent Overstreet while (offset + sectors < PAGE_SECTORS && 11482ba5d38bSKent Overstreet orig.s[offset + sectors].state >= SECTOR_DIRTY) 11497f5e31e1SKent Overstreet sectors++; 11507f5e31e1SKent Overstreet 11517f5e31e1SKent Overstreet for (i = offset; i < offset + sectors; i++) { 11527f5e31e1SKent Overstreet reserved_sectors += orig.s[i].replicas_reserved; 11537f5e31e1SKent Overstreet dirty_sectors += orig.s[i].state == SECTOR_DIRTY; 11547f5e31e1SKent Overstreet } 11557f5e31e1SKent Overstreet 11561c6fdbd8SKent Overstreet if (w->io && 11579a3df993SKent Overstreet (w->io->op.res.nr_replicas != nr_replicas_this_write || 11589a3df993SKent Overstreet bio_full(&w->io->op.wbio.bio, PAGE_SIZE) || 1159a9440743SKent Overstreet w->io->op.wbio.bio.bi_iter.bi_size >= (256U << 20) || 11609a3df993SKent Overstreet bio_end_sector(&w->io->op.wbio.bio) != sector)) 11611c6fdbd8SKent Overstreet bch2_writepage_do_io(w); 11621c6fdbd8SKent Overstreet 11631c6fdbd8SKent Overstreet if (!w->io) 11647f5e31e1SKent Overstreet bch2_writepage_io_alloc(c, w, inode, sector, 1165f81b648dSKent Overstreet nr_replicas_this_write); 11661c6fdbd8SKent Overstreet 11677f5e31e1SKent Overstreet atomic_inc(&s->write_count); 11687f5e31e1SKent Overstreet 11699a3df993SKent Overstreet BUG_ON(inode != w->io->inode); 11709a3df993SKent Overstreet BUG_ON(!bio_add_page(&w->io->op.wbio.bio, page, 11717f5e31e1SKent Overstreet sectors << 9, offset << 9)); 11721c6fdbd8SKent Overstreet 11736cc3535dSKent Overstreet /* Check for writing past i_size: */ 11749a3df993SKent Overstreet WARN_ON((bio_end_sector(&w->io->op.wbio.bio) << 9) > 11756cc3535dSKent Overstreet round_up(i_size, block_bytes(c))); 11766cc3535dSKent Overstreet 11779a3df993SKent Overstreet w->io->op.res.sectors += reserved_sectors; 11789a3df993SKent Overstreet w->io->op.i_sectors_delta -= dirty_sectors; 11791c6fdbd8SKent Overstreet w->io->op.new_i_size = i_size; 11801c6fdbd8SKent Overstreet 11811c6fdbd8SKent Overstreet if (wbc->sync_mode == WB_SYNC_ALL) 11829a3df993SKent Overstreet w->io->op.wbio.bio.bi_opf |= REQ_SYNC; 11831c6fdbd8SKent Overstreet 11847f5e31e1SKent Overstreet offset += sectors; 11857f5e31e1SKent Overstreet } 11867f5e31e1SKent Overstreet 11877f5e31e1SKent Overstreet if (atomic_dec_and_test(&s->write_count)) 11887f5e31e1SKent Overstreet end_page_writeback(page); 11897f5e31e1SKent Overstreet 11901c6fdbd8SKent Overstreet return 0; 11911c6fdbd8SKent Overstreet } 11921c6fdbd8SKent Overstreet 11931c6fdbd8SKent Overstreet int bch2_writepages(struct address_space *mapping, struct writeback_control *wbc) 11941c6fdbd8SKent Overstreet { 11951c6fdbd8SKent Overstreet struct bch_fs *c = mapping->host->i_sb->s_fs_info; 11961c6fdbd8SKent Overstreet struct bch_writepage_state w = 11971c6fdbd8SKent Overstreet bch_writepage_state_init(c, to_bch_ei(mapping->host)); 11981c6fdbd8SKent Overstreet struct blk_plug plug; 11991c6fdbd8SKent Overstreet int ret; 12001c6fdbd8SKent Overstreet 12011c6fdbd8SKent Overstreet blk_start_plug(&plug); 12021c6fdbd8SKent Overstreet ret = write_cache_pages(mapping, wbc, __bch2_writepage, &w); 12031c6fdbd8SKent Overstreet if (w.io) 12041c6fdbd8SKent Overstreet bch2_writepage_do_io(&w); 12051c6fdbd8SKent Overstreet blk_finish_plug(&plug); 12061c6fdbd8SKent Overstreet return ret; 12071c6fdbd8SKent Overstreet } 12081c6fdbd8SKent Overstreet 12091c6fdbd8SKent Overstreet int bch2_writepage(struct page *page, struct writeback_control *wbc) 12101c6fdbd8SKent Overstreet { 12111c6fdbd8SKent Overstreet struct bch_fs *c = page->mapping->host->i_sb->s_fs_info; 12121c6fdbd8SKent Overstreet struct bch_writepage_state w = 12131c6fdbd8SKent Overstreet bch_writepage_state_init(c, to_bch_ei(page->mapping->host)); 12141c6fdbd8SKent Overstreet int ret; 12151c6fdbd8SKent Overstreet 12161c6fdbd8SKent Overstreet ret = __bch2_writepage(page_folio(page), wbc, &w); 12171c6fdbd8SKent Overstreet if (w.io) 12181c6fdbd8SKent Overstreet bch2_writepage_do_io(&w); 12191c6fdbd8SKent Overstreet 12201c6fdbd8SKent Overstreet return ret; 12211c6fdbd8SKent Overstreet } 12221c6fdbd8SKent Overstreet 12231c6fdbd8SKent Overstreet /* buffered writes: */ 12241c6fdbd8SKent Overstreet 12251c6fdbd8SKent Overstreet int bch2_write_begin(struct file *file, struct address_space *mapping, 12261c6fdbd8SKent Overstreet loff_t pos, unsigned len, 12271c6fdbd8SKent Overstreet struct page **pagep, void **fsdata) 12281c6fdbd8SKent Overstreet { 12291c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(mapping->host); 12301c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 1231d1542e03SKent Overstreet struct bch2_page_reservation *res; 12321c6fdbd8SKent Overstreet pgoff_t index = pos >> PAGE_SHIFT; 12331c6fdbd8SKent Overstreet unsigned offset = pos & (PAGE_SIZE - 1); 12341c6fdbd8SKent Overstreet struct page *page; 12351c6fdbd8SKent Overstreet int ret = -ENOMEM; 12361c6fdbd8SKent Overstreet 1237d1542e03SKent Overstreet res = kmalloc(sizeof(*res), GFP_KERNEL); 1238d1542e03SKent Overstreet if (!res) 1239d1542e03SKent Overstreet return -ENOMEM; 1240d1542e03SKent Overstreet 1241d1542e03SKent Overstreet bch2_page_reservation_init(c, inode, res); 1242d1542e03SKent Overstreet *fsdata = res; 12431c6fdbd8SKent Overstreet 12441c6fdbd8SKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 12451c6fdbd8SKent Overstreet 12461c6fdbd8SKent Overstreet page = grab_cache_page_write_begin(mapping, index); 12471c6fdbd8SKent Overstreet if (!page) 12481c6fdbd8SKent Overstreet goto err_unlock; 12491c6fdbd8SKent Overstreet 12501c6fdbd8SKent Overstreet if (PageUptodate(page)) 12511c6fdbd8SKent Overstreet goto out; 12521c6fdbd8SKent Overstreet 12531c6fdbd8SKent Overstreet /* If we're writing entire page, don't need to read it in first: */ 12541c6fdbd8SKent Overstreet if (len == PAGE_SIZE) 12551c6fdbd8SKent Overstreet goto out; 12561c6fdbd8SKent Overstreet 12571c6fdbd8SKent Overstreet if (!offset && pos + len >= inode->v.i_size) { 12581c6fdbd8SKent Overstreet zero_user_segment(page, len, PAGE_SIZE); 12591c6fdbd8SKent Overstreet flush_dcache_page(page); 12601c6fdbd8SKent Overstreet goto out; 12611c6fdbd8SKent Overstreet } 12621c6fdbd8SKent Overstreet 12631c6fdbd8SKent Overstreet if (index > inode->v.i_size >> PAGE_SHIFT) { 12641c6fdbd8SKent Overstreet zero_user_segments(page, 0, offset, offset + len, PAGE_SIZE); 12651c6fdbd8SKent Overstreet flush_dcache_page(page); 12661c6fdbd8SKent Overstreet goto out; 12671c6fdbd8SKent Overstreet } 12681c6fdbd8SKent Overstreet readpage: 12691c6fdbd8SKent Overstreet ret = bch2_read_single_page(page, mapping); 12701c6fdbd8SKent Overstreet if (ret) 12711c6fdbd8SKent Overstreet goto err; 12721c6fdbd8SKent Overstreet out: 1273d1542e03SKent Overstreet ret = bch2_page_reservation_get(c, inode, page, res, 1274d1542e03SKent Overstreet offset, len, true); 12751c6fdbd8SKent Overstreet if (ret) { 12761c6fdbd8SKent Overstreet if (!PageUptodate(page)) { 12771c6fdbd8SKent Overstreet /* 12781c6fdbd8SKent Overstreet * If the page hasn't been read in, we won't know if we 12791c6fdbd8SKent Overstreet * actually need a reservation - we don't actually need 12801c6fdbd8SKent Overstreet * to read here, we just need to check if the page is 12811c6fdbd8SKent Overstreet * fully backed by uncompressed data: 12821c6fdbd8SKent Overstreet */ 12831c6fdbd8SKent Overstreet goto readpage; 12841c6fdbd8SKent Overstreet } 12851c6fdbd8SKent Overstreet 12861c6fdbd8SKent Overstreet goto err; 12871c6fdbd8SKent Overstreet } 12881c6fdbd8SKent Overstreet 12891c6fdbd8SKent Overstreet *pagep = page; 12901c6fdbd8SKent Overstreet return 0; 12911c6fdbd8SKent Overstreet err: 12921c6fdbd8SKent Overstreet unlock_page(page); 12931c6fdbd8SKent Overstreet put_page(page); 12941c6fdbd8SKent Overstreet *pagep = NULL; 12951c6fdbd8SKent Overstreet err_unlock: 12961c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 1297d1542e03SKent Overstreet kfree(res); 1298d1542e03SKent Overstreet *fsdata = NULL; 12991c6fdbd8SKent Overstreet return ret; 13001c6fdbd8SKent Overstreet } 13011c6fdbd8SKent Overstreet 13021c6fdbd8SKent Overstreet int bch2_write_end(struct file *file, struct address_space *mapping, 13031c6fdbd8SKent Overstreet loff_t pos, unsigned len, unsigned copied, 13041c6fdbd8SKent Overstreet struct page *page, void *fsdata) 13051c6fdbd8SKent Overstreet { 13061c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(mapping->host); 13071c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 1308d1542e03SKent Overstreet struct bch2_page_reservation *res = fsdata; 1309d1542e03SKent Overstreet unsigned offset = pos & (PAGE_SIZE - 1); 13101c6fdbd8SKent Overstreet 13111c6fdbd8SKent Overstreet lockdep_assert_held(&inode->v.i_rwsem); 13121c6fdbd8SKent Overstreet 13131c6fdbd8SKent Overstreet if (unlikely(copied < len && !PageUptodate(page))) { 13141c6fdbd8SKent Overstreet /* 13151c6fdbd8SKent Overstreet * The page needs to be read in, but that would destroy 13161c6fdbd8SKent Overstreet * our partial write - simplest thing is to just force 13171c6fdbd8SKent Overstreet * userspace to redo the write: 13181c6fdbd8SKent Overstreet */ 13191c6fdbd8SKent Overstreet zero_user(page, 0, PAGE_SIZE); 13201c6fdbd8SKent Overstreet flush_dcache_page(page); 13211c6fdbd8SKent Overstreet copied = 0; 13221c6fdbd8SKent Overstreet } 13231c6fdbd8SKent Overstreet 13241c6fdbd8SKent Overstreet spin_lock(&inode->v.i_lock); 13251c6fdbd8SKent Overstreet if (pos + copied > inode->v.i_size) 13261c6fdbd8SKent Overstreet i_size_write(&inode->v, pos + copied); 13271c6fdbd8SKent Overstreet spin_unlock(&inode->v.i_lock); 13281c6fdbd8SKent Overstreet 13291c6fdbd8SKent Overstreet if (copied) { 13301c6fdbd8SKent Overstreet if (!PageUptodate(page)) 13311c6fdbd8SKent Overstreet SetPageUptodate(page); 1332d1542e03SKent Overstreet 1333d1542e03SKent Overstreet bch2_set_page_dirty(c, inode, page, res, offset, copied); 13341c6fdbd8SKent Overstreet 13351c6fdbd8SKent Overstreet inode->ei_last_dirtied = (unsigned long) current; 13361c6fdbd8SKent Overstreet } 13371c6fdbd8SKent Overstreet 13381c6fdbd8SKent Overstreet unlock_page(page); 13391c6fdbd8SKent Overstreet put_page(page); 13401c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 13411c6fdbd8SKent Overstreet 1342d1542e03SKent Overstreet bch2_page_reservation_put(c, inode, res); 1343d1542e03SKent Overstreet kfree(res); 1344d1542e03SKent Overstreet 13451c6fdbd8SKent Overstreet return copied; 13461c6fdbd8SKent Overstreet } 13471c6fdbd8SKent Overstreet 13481c6fdbd8SKent Overstreet #define WRITE_BATCH_PAGES 32 13491c6fdbd8SKent Overstreet 13501c6fdbd8SKent Overstreet static int __bch2_buffered_write(struct bch_inode_info *inode, 13511c6fdbd8SKent Overstreet struct address_space *mapping, 13521c6fdbd8SKent Overstreet struct iov_iter *iter, 13531c6fdbd8SKent Overstreet loff_t pos, unsigned len) 13541c6fdbd8SKent Overstreet { 13551c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 13561c6fdbd8SKent Overstreet struct page *pages[WRITE_BATCH_PAGES]; 1357d1542e03SKent Overstreet struct bch2_page_reservation res; 13581c6fdbd8SKent Overstreet unsigned long index = pos >> PAGE_SHIFT; 13591c6fdbd8SKent Overstreet unsigned offset = pos & (PAGE_SIZE - 1); 13601c6fdbd8SKent Overstreet unsigned nr_pages = DIV_ROUND_UP(offset + len, PAGE_SIZE); 1361d1542e03SKent Overstreet unsigned i, reserved = 0, set_dirty = 0; 1362d1542e03SKent Overstreet unsigned copied = 0, nr_pages_copied = 0; 13631c6fdbd8SKent Overstreet int ret = 0; 13641c6fdbd8SKent Overstreet 13651c6fdbd8SKent Overstreet BUG_ON(!len); 13661c6fdbd8SKent Overstreet BUG_ON(nr_pages > ARRAY_SIZE(pages)); 13671c6fdbd8SKent Overstreet 1368d1542e03SKent Overstreet bch2_page_reservation_init(c, inode, &res); 1369d1542e03SKent Overstreet 13701c6fdbd8SKent Overstreet for (i = 0; i < nr_pages; i++) { 13711c6fdbd8SKent Overstreet pages[i] = grab_cache_page_write_begin(mapping, index + i); 13721c6fdbd8SKent Overstreet if (!pages[i]) { 13731c6fdbd8SKent Overstreet nr_pages = i; 13748de819f8SKent Overstreet if (!i) { 13751c6fdbd8SKent Overstreet ret = -ENOMEM; 13761c6fdbd8SKent Overstreet goto out; 13771c6fdbd8SKent Overstreet } 13788de819f8SKent Overstreet len = min_t(unsigned, len, 13798de819f8SKent Overstreet nr_pages * PAGE_SIZE - offset); 13808de819f8SKent Overstreet break; 13818de819f8SKent Overstreet } 13821c6fdbd8SKent Overstreet } 13831c6fdbd8SKent Overstreet 13841c6fdbd8SKent Overstreet if (offset && !PageUptodate(pages[0])) { 13851c6fdbd8SKent Overstreet ret = bch2_read_single_page(pages[0], mapping); 13861c6fdbd8SKent Overstreet if (ret) 13871c6fdbd8SKent Overstreet goto out; 13881c6fdbd8SKent Overstreet } 13891c6fdbd8SKent Overstreet 13901c6fdbd8SKent Overstreet if ((pos + len) & (PAGE_SIZE - 1) && 13911c6fdbd8SKent Overstreet !PageUptodate(pages[nr_pages - 1])) { 13921c6fdbd8SKent Overstreet if ((index + nr_pages - 1) << PAGE_SHIFT >= inode->v.i_size) { 13931c6fdbd8SKent Overstreet zero_user(pages[nr_pages - 1], 0, PAGE_SIZE); 13941c6fdbd8SKent Overstreet } else { 13951c6fdbd8SKent Overstreet ret = bch2_read_single_page(pages[nr_pages - 1], mapping); 13961c6fdbd8SKent Overstreet if (ret) 13971c6fdbd8SKent Overstreet goto out; 13981c6fdbd8SKent Overstreet } 13991c6fdbd8SKent Overstreet } 14001c6fdbd8SKent Overstreet 1401d1542e03SKent Overstreet while (reserved < len) { 1402d1542e03SKent Overstreet struct page *page = pages[(offset + reserved) >> PAGE_SHIFT]; 1403d1542e03SKent Overstreet unsigned pg_offset = (offset + reserved) & (PAGE_SIZE - 1); 1404d1542e03SKent Overstreet unsigned pg_len = min_t(unsigned, len - reserved, 1405d1542e03SKent Overstreet PAGE_SIZE - pg_offset); 1406d1542e03SKent Overstreet retry_reservation: 1407d1542e03SKent Overstreet ret = bch2_page_reservation_get(c, inode, page, &res, 1408d1542e03SKent Overstreet pg_offset, pg_len, true); 14091c6fdbd8SKent Overstreet 1410d1542e03SKent Overstreet if (ret && !PageUptodate(page)) { 1411d1542e03SKent Overstreet ret = bch2_read_single_page(page, mapping); 1412d1542e03SKent Overstreet if (!ret) 1413d1542e03SKent Overstreet goto retry_reservation; 14141c6fdbd8SKent Overstreet } 14151c6fdbd8SKent Overstreet 14161c6fdbd8SKent Overstreet if (ret) 14171c6fdbd8SKent Overstreet goto out; 1418d1542e03SKent Overstreet 1419d1542e03SKent Overstreet reserved += pg_len; 14201c6fdbd8SKent Overstreet } 14211c6fdbd8SKent Overstreet 14221c6fdbd8SKent Overstreet if (mapping_writably_mapped(mapping)) 14231c6fdbd8SKent Overstreet for (i = 0; i < nr_pages; i++) 14241c6fdbd8SKent Overstreet flush_dcache_page(pages[i]); 14251c6fdbd8SKent Overstreet 14261c6fdbd8SKent Overstreet while (copied < len) { 14271c6fdbd8SKent Overstreet struct page *page = pages[(offset + copied) >> PAGE_SHIFT]; 14281c6fdbd8SKent Overstreet unsigned pg_offset = (offset + copied) & (PAGE_SIZE - 1); 1429d1542e03SKent Overstreet unsigned pg_len = min_t(unsigned, len - copied, 14301c6fdbd8SKent Overstreet PAGE_SIZE - pg_offset); 14311c6fdbd8SKent Overstreet unsigned pg_copied = copy_page_from_iter_atomic(page, 1432d1542e03SKent Overstreet pg_offset, pg_len, iter); 1433d1542e03SKent Overstreet 1434d1542e03SKent Overstreet if (!pg_copied) 1435d1542e03SKent Overstreet break; 14361c6fdbd8SKent Overstreet 14371c6fdbd8SKent Overstreet flush_dcache_page(page); 14381c6fdbd8SKent Overstreet copied += pg_copied; 14391c6fdbd8SKent Overstreet } 14401c6fdbd8SKent Overstreet 14411c6fdbd8SKent Overstreet if (!copied) 14421c6fdbd8SKent Overstreet goto out; 14431c6fdbd8SKent Overstreet 14441c6fdbd8SKent Overstreet if (copied < len && 14451c6fdbd8SKent Overstreet ((offset + copied) & (PAGE_SIZE - 1))) { 14461c6fdbd8SKent Overstreet struct page *page = pages[(offset + copied) >> PAGE_SHIFT]; 14471c6fdbd8SKent Overstreet 14481c6fdbd8SKent Overstreet if (!PageUptodate(page)) { 14491c6fdbd8SKent Overstreet zero_user(page, 0, PAGE_SIZE); 14501c6fdbd8SKent Overstreet copied -= (offset + copied) & (PAGE_SIZE - 1); 14511c6fdbd8SKent Overstreet } 14521c6fdbd8SKent Overstreet } 1453d1542e03SKent Overstreet 1454877dfb34SKent Overstreet spin_lock(&inode->v.i_lock); 1455877dfb34SKent Overstreet if (pos + copied > inode->v.i_size) 1456877dfb34SKent Overstreet i_size_write(&inode->v, pos + copied); 1457877dfb34SKent Overstreet spin_unlock(&inode->v.i_lock); 1458877dfb34SKent Overstreet 1459d1542e03SKent Overstreet while (set_dirty < copied) { 1460d1542e03SKent Overstreet struct page *page = pages[(offset + set_dirty) >> PAGE_SHIFT]; 1461d1542e03SKent Overstreet unsigned pg_offset = (offset + set_dirty) & (PAGE_SIZE - 1); 1462d1542e03SKent Overstreet unsigned pg_len = min_t(unsigned, copied - set_dirty, 1463d1542e03SKent Overstreet PAGE_SIZE - pg_offset); 1464d1542e03SKent Overstreet 1465d1542e03SKent Overstreet if (!PageUptodate(page)) 1466d1542e03SKent Overstreet SetPageUptodate(page); 1467d1542e03SKent Overstreet 1468d1542e03SKent Overstreet bch2_set_page_dirty(c, inode, page, &res, pg_offset, pg_len); 1469d1542e03SKent Overstreet unlock_page(page); 1470d1542e03SKent Overstreet put_page(page); 1471d1542e03SKent Overstreet 1472d1542e03SKent Overstreet set_dirty += pg_len; 1473d1542e03SKent Overstreet } 1474877dfb34SKent Overstreet 1475877dfb34SKent Overstreet nr_pages_copied = DIV_ROUND_UP(offset + copied, PAGE_SIZE); 1476877dfb34SKent Overstreet inode->ei_last_dirtied = (unsigned long) current; 14771c6fdbd8SKent Overstreet out: 1478d1542e03SKent Overstreet for (i = nr_pages_copied; i < nr_pages; i++) { 14791c6fdbd8SKent Overstreet unlock_page(pages[i]); 14801c6fdbd8SKent Overstreet put_page(pages[i]); 14811c6fdbd8SKent Overstreet } 14821c6fdbd8SKent Overstreet 1483d1542e03SKent Overstreet bch2_page_reservation_put(c, inode, &res); 14841c6fdbd8SKent Overstreet 14851c6fdbd8SKent Overstreet return copied ?: ret; 14861c6fdbd8SKent Overstreet } 14871c6fdbd8SKent Overstreet 14881c6fdbd8SKent Overstreet static ssize_t bch2_buffered_write(struct kiocb *iocb, struct iov_iter *iter) 14891c6fdbd8SKent Overstreet { 14901c6fdbd8SKent Overstreet struct file *file = iocb->ki_filp; 14911c6fdbd8SKent Overstreet struct address_space *mapping = file->f_mapping; 14921c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 14931c6fdbd8SKent Overstreet loff_t pos = iocb->ki_pos; 14941c6fdbd8SKent Overstreet ssize_t written = 0; 14951c6fdbd8SKent Overstreet int ret = 0; 14961c6fdbd8SKent Overstreet 14971c6fdbd8SKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 14981c6fdbd8SKent Overstreet 14991c6fdbd8SKent Overstreet do { 15001c6fdbd8SKent Overstreet unsigned offset = pos & (PAGE_SIZE - 1); 15011c6fdbd8SKent Overstreet unsigned bytes = min_t(unsigned long, iov_iter_count(iter), 15021c6fdbd8SKent Overstreet PAGE_SIZE * WRITE_BATCH_PAGES - offset); 15031c6fdbd8SKent Overstreet again: 15041c6fdbd8SKent Overstreet /* 15051c6fdbd8SKent Overstreet * Bring in the user page that we will copy from _first_. 15061c6fdbd8SKent Overstreet * Otherwise there's a nasty deadlock on copying from the 15071c6fdbd8SKent Overstreet * same page as we're writing to, without it being marked 15081c6fdbd8SKent Overstreet * up-to-date. 15091c6fdbd8SKent Overstreet * 15101c6fdbd8SKent Overstreet * Not only is this an optimisation, but it is also required 15111c6fdbd8SKent Overstreet * to check that the address is actually valid, when atomic 15121c6fdbd8SKent Overstreet * usercopies are used, below. 15131c6fdbd8SKent Overstreet */ 15141c6fdbd8SKent Overstreet if (unlikely(fault_in_iov_iter_readable(iter, bytes))) { 15151c6fdbd8SKent Overstreet bytes = min_t(unsigned long, iov_iter_count(iter), 15161c6fdbd8SKent Overstreet PAGE_SIZE - offset); 15171c6fdbd8SKent Overstreet 15181c6fdbd8SKent Overstreet if (unlikely(fault_in_iov_iter_readable(iter, bytes))) { 15191c6fdbd8SKent Overstreet ret = -EFAULT; 15201c6fdbd8SKent Overstreet break; 15211c6fdbd8SKent Overstreet } 15221c6fdbd8SKent Overstreet } 15231c6fdbd8SKent Overstreet 15241c6fdbd8SKent Overstreet if (unlikely(fatal_signal_pending(current))) { 15251c6fdbd8SKent Overstreet ret = -EINTR; 15261c6fdbd8SKent Overstreet break; 15271c6fdbd8SKent Overstreet } 15281c6fdbd8SKent Overstreet 15291c6fdbd8SKent Overstreet ret = __bch2_buffered_write(inode, mapping, iter, pos, bytes); 15301c6fdbd8SKent Overstreet if (unlikely(ret < 0)) 15311c6fdbd8SKent Overstreet break; 15321c6fdbd8SKent Overstreet 15331c6fdbd8SKent Overstreet cond_resched(); 15341c6fdbd8SKent Overstreet 15351c6fdbd8SKent Overstreet if (unlikely(ret == 0)) { 15361c6fdbd8SKent Overstreet /* 15371c6fdbd8SKent Overstreet * If we were unable to copy any data at all, we must 15381c6fdbd8SKent Overstreet * fall back to a single segment length write. 15391c6fdbd8SKent Overstreet * 15401c6fdbd8SKent Overstreet * If we didn't fallback here, we could livelock 15411c6fdbd8SKent Overstreet * because not all segments in the iov can be copied at 15421c6fdbd8SKent Overstreet * once without a pagefault. 15431c6fdbd8SKent Overstreet */ 15441c6fdbd8SKent Overstreet bytes = min_t(unsigned long, PAGE_SIZE - offset, 15451c6fdbd8SKent Overstreet iov_iter_single_seg_count(iter)); 15461c6fdbd8SKent Overstreet goto again; 15471c6fdbd8SKent Overstreet } 15481c6fdbd8SKent Overstreet pos += ret; 15491c6fdbd8SKent Overstreet written += ret; 15501c6fdbd8SKent Overstreet 15511c6fdbd8SKent Overstreet balance_dirty_pages_ratelimited(mapping); 15521c6fdbd8SKent Overstreet } while (iov_iter_count(iter)); 15531c6fdbd8SKent Overstreet 15541c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 15551c6fdbd8SKent Overstreet 15561c6fdbd8SKent Overstreet return written ? written : ret; 15571c6fdbd8SKent Overstreet } 15581c6fdbd8SKent Overstreet 15591c6fdbd8SKent Overstreet /* O_DIRECT reads */ 15601c6fdbd8SKent Overstreet 15611c6fdbd8SKent Overstreet static void bch2_dio_read_complete(struct closure *cl) 15621c6fdbd8SKent Overstreet { 15631c6fdbd8SKent Overstreet struct dio_read *dio = container_of(cl, struct dio_read, cl); 15641c6fdbd8SKent Overstreet 15651c6fdbd8SKent Overstreet dio->req->ki_complete(dio->req, dio->ret); 15661c6fdbd8SKent Overstreet bio_check_pages_dirty(&dio->rbio.bio); /* transfers ownership */ 15671c6fdbd8SKent Overstreet } 15681c6fdbd8SKent Overstreet 15691c6fdbd8SKent Overstreet static void bch2_direct_IO_read_endio(struct bio *bio) 15701c6fdbd8SKent Overstreet { 15711c6fdbd8SKent Overstreet struct dio_read *dio = bio->bi_private; 15721c6fdbd8SKent Overstreet 15731c6fdbd8SKent Overstreet if (bio->bi_status) 15741c6fdbd8SKent Overstreet dio->ret = blk_status_to_errno(bio->bi_status); 15751c6fdbd8SKent Overstreet 15761c6fdbd8SKent Overstreet closure_put(&dio->cl); 15771c6fdbd8SKent Overstreet } 15781c6fdbd8SKent Overstreet 15791c6fdbd8SKent Overstreet static void bch2_direct_IO_read_split_endio(struct bio *bio) 15801c6fdbd8SKent Overstreet { 15811c6fdbd8SKent Overstreet bch2_direct_IO_read_endio(bio); 15821c6fdbd8SKent Overstreet bio_check_pages_dirty(bio); /* transfers ownership */ 15831c6fdbd8SKent Overstreet } 15841c6fdbd8SKent Overstreet 15851c6fdbd8SKent Overstreet static int bch2_direct_IO_read(struct kiocb *req, struct iov_iter *iter) 15861c6fdbd8SKent Overstreet { 15871c6fdbd8SKent Overstreet struct file *file = req->ki_filp; 15881c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 15891c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 15909a3df993SKent Overstreet struct bch_io_opts opts = io_opts(c, &inode->ei_inode); 15911c6fdbd8SKent Overstreet struct dio_read *dio; 15921c6fdbd8SKent Overstreet struct bio *bio; 15931c6fdbd8SKent Overstreet loff_t offset = req->ki_pos; 15941c6fdbd8SKent Overstreet bool sync = is_sync_kiocb(req); 15951c6fdbd8SKent Overstreet size_t shorten; 15961c6fdbd8SKent Overstreet ssize_t ret; 15971c6fdbd8SKent Overstreet 15981c6fdbd8SKent Overstreet if ((offset|iter->count) & (block_bytes(c) - 1)) 15991c6fdbd8SKent Overstreet return -EINVAL; 16001c6fdbd8SKent Overstreet 16011c6fdbd8SKent Overstreet ret = min_t(loff_t, iter->count, 16021c6fdbd8SKent Overstreet max_t(loff_t, 0, i_size_read(&inode->v) - offset)); 16031c6fdbd8SKent Overstreet 16041c6fdbd8SKent Overstreet if (!ret) 16051c6fdbd8SKent Overstreet return ret; 16061c6fdbd8SKent Overstreet 16071c6fdbd8SKent Overstreet shorten = iov_iter_count(iter) - round_up(ret, block_bytes(c)); 16081c6fdbd8SKent Overstreet iter->count -= shorten; 16091c6fdbd8SKent Overstreet 16101c6fdbd8SKent Overstreet bio = bio_alloc_bioset(NULL, 16111c6fdbd8SKent Overstreet iov_iter_npages(iter, BIO_MAX_VECS), 16121c6fdbd8SKent Overstreet REQ_OP_READ, 16131c6fdbd8SKent Overstreet GFP_KERNEL, 16141c6fdbd8SKent Overstreet &c->dio_read_bioset); 16151c6fdbd8SKent Overstreet 16161c6fdbd8SKent Overstreet bio->bi_end_io = bch2_direct_IO_read_endio; 16171c6fdbd8SKent Overstreet 16181c6fdbd8SKent Overstreet dio = container_of(bio, struct dio_read, rbio.bio); 16191c6fdbd8SKent Overstreet closure_init(&dio->cl, NULL); 16201c6fdbd8SKent Overstreet 16211c6fdbd8SKent Overstreet /* 16221c6fdbd8SKent Overstreet * this is a _really_ horrible hack just to avoid an atomic sub at the 16231c6fdbd8SKent Overstreet * end: 16241c6fdbd8SKent Overstreet */ 16251c6fdbd8SKent Overstreet if (!sync) { 16261c6fdbd8SKent Overstreet set_closure_fn(&dio->cl, bch2_dio_read_complete, NULL); 16271c6fdbd8SKent Overstreet atomic_set(&dio->cl.remaining, 16281c6fdbd8SKent Overstreet CLOSURE_REMAINING_INITIALIZER - 16291c6fdbd8SKent Overstreet CLOSURE_RUNNING + 16301c6fdbd8SKent Overstreet CLOSURE_DESTRUCTOR); 16311c6fdbd8SKent Overstreet } else { 16321c6fdbd8SKent Overstreet atomic_set(&dio->cl.remaining, 16331c6fdbd8SKent Overstreet CLOSURE_REMAINING_INITIALIZER + 1); 16341c6fdbd8SKent Overstreet } 16351c6fdbd8SKent Overstreet 16361c6fdbd8SKent Overstreet dio->req = req; 16371c6fdbd8SKent Overstreet dio->ret = ret; 16381c6fdbd8SKent Overstreet 16391c6fdbd8SKent Overstreet goto start; 16401c6fdbd8SKent Overstreet while (iter->count) { 16411c6fdbd8SKent Overstreet bio = bio_alloc_bioset(NULL, 16421c6fdbd8SKent Overstreet iov_iter_npages(iter, BIO_MAX_VECS), 16431c6fdbd8SKent Overstreet REQ_OP_READ, 16441c6fdbd8SKent Overstreet GFP_KERNEL, 16451c6fdbd8SKent Overstreet &c->bio_read); 16461c6fdbd8SKent Overstreet bio->bi_end_io = bch2_direct_IO_read_split_endio; 16471c6fdbd8SKent Overstreet start: 16481c6fdbd8SKent Overstreet bio->bi_opf = REQ_OP_READ|REQ_SYNC; 16491c6fdbd8SKent Overstreet bio->bi_iter.bi_sector = offset >> 9; 16501c6fdbd8SKent Overstreet bio->bi_private = dio; 16511c6fdbd8SKent Overstreet 16521c6fdbd8SKent Overstreet ret = bio_iov_iter_get_pages(bio, iter); 16531c6fdbd8SKent Overstreet if (ret < 0) { 16541c6fdbd8SKent Overstreet /* XXX: fault inject this path */ 16551c6fdbd8SKent Overstreet bio->bi_status = BLK_STS_RESOURCE; 16561c6fdbd8SKent Overstreet bio_endio(bio); 16571c6fdbd8SKent Overstreet break; 16581c6fdbd8SKent Overstreet } 16591c6fdbd8SKent Overstreet 16601c6fdbd8SKent Overstreet offset += bio->bi_iter.bi_size; 16611c6fdbd8SKent Overstreet bio_set_pages_dirty(bio); 16621c6fdbd8SKent Overstreet 16631c6fdbd8SKent Overstreet if (iter->count) 16641c6fdbd8SKent Overstreet closure_get(&dio->cl); 16651c6fdbd8SKent Overstreet 16661c6fdbd8SKent Overstreet bch2_read(c, rbio_init(bio, opts), inode->v.i_ino); 16671c6fdbd8SKent Overstreet } 16681c6fdbd8SKent Overstreet 16691c6fdbd8SKent Overstreet iter->count += shorten; 16701c6fdbd8SKent Overstreet 16711c6fdbd8SKent Overstreet if (sync) { 16721c6fdbd8SKent Overstreet closure_sync(&dio->cl); 16731c6fdbd8SKent Overstreet closure_debug_destroy(&dio->cl); 16741c6fdbd8SKent Overstreet ret = dio->ret; 16751c6fdbd8SKent Overstreet bio_check_pages_dirty(&dio->rbio.bio); /* transfers ownership */ 16761c6fdbd8SKent Overstreet return ret; 16771c6fdbd8SKent Overstreet } else { 16781c6fdbd8SKent Overstreet return -EIOCBQUEUED; 16791c6fdbd8SKent Overstreet } 16801c6fdbd8SKent Overstreet } 16811c6fdbd8SKent Overstreet 16821c6fdbd8SKent Overstreet ssize_t bch2_read_iter(struct kiocb *iocb, struct iov_iter *iter) 16831c6fdbd8SKent Overstreet { 16841c6fdbd8SKent Overstreet struct file *file = iocb->ki_filp; 16851c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 16861c6fdbd8SKent Overstreet struct address_space *mapping = file->f_mapping; 16871c6fdbd8SKent Overstreet size_t count = iov_iter_count(iter); 16881c6fdbd8SKent Overstreet ssize_t ret; 16891c6fdbd8SKent Overstreet 16901c6fdbd8SKent Overstreet if (!count) 16911c6fdbd8SKent Overstreet return 0; /* skip atime */ 16921c6fdbd8SKent Overstreet 16931c6fdbd8SKent Overstreet if (iocb->ki_flags & IOCB_DIRECT) { 16941c6fdbd8SKent Overstreet struct blk_plug plug; 16951c6fdbd8SKent Overstreet 1696a023127aSKent Overstreet if (unlikely(mapping->nrpages)) { 16971c6fdbd8SKent Overstreet ret = filemap_write_and_wait_range(mapping, 16981c6fdbd8SKent Overstreet iocb->ki_pos, 16991c6fdbd8SKent Overstreet iocb->ki_pos + count - 1); 17001c6fdbd8SKent Overstreet if (ret < 0) 17011c6fdbd8SKent Overstreet return ret; 1702a023127aSKent Overstreet } 17031c6fdbd8SKent Overstreet 17041c6fdbd8SKent Overstreet file_accessed(file); 17051c6fdbd8SKent Overstreet 17061c6fdbd8SKent Overstreet blk_start_plug(&plug); 17071c6fdbd8SKent Overstreet ret = bch2_direct_IO_read(iocb, iter); 17081c6fdbd8SKent Overstreet blk_finish_plug(&plug); 17091c6fdbd8SKent Overstreet 17101c6fdbd8SKent Overstreet if (ret >= 0) 17111c6fdbd8SKent Overstreet iocb->ki_pos += ret; 17121c6fdbd8SKent Overstreet } else { 17131c6fdbd8SKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 17141c6fdbd8SKent Overstreet ret = generic_file_read_iter(iocb, iter); 17151c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 17161c6fdbd8SKent Overstreet } 17171c6fdbd8SKent Overstreet 17181c6fdbd8SKent Overstreet return ret; 17191c6fdbd8SKent Overstreet } 17201c6fdbd8SKent Overstreet 17211c6fdbd8SKent Overstreet /* O_DIRECT writes */ 17221c6fdbd8SKent Overstreet 17231c6fdbd8SKent Overstreet /* 17241c6fdbd8SKent Overstreet * We're going to return -EIOCBQUEUED, but we haven't finished consuming the 17251c6fdbd8SKent Overstreet * iov_iter yet, so we need to stash a copy of the iovec: it might be on the 17261c6fdbd8SKent Overstreet * caller's stack, we're not guaranteed that it will live for the duration of 17271c6fdbd8SKent Overstreet * the IO: 17281c6fdbd8SKent Overstreet */ 17291c6fdbd8SKent Overstreet static noinline int bch2_dio_write_copy_iov(struct dio_write *dio) 17301c6fdbd8SKent Overstreet { 17311c6fdbd8SKent Overstreet struct iovec *iov = dio->inline_vecs; 17321c6fdbd8SKent Overstreet 17331c6fdbd8SKent Overstreet /* 17341c6fdbd8SKent Overstreet * iov_iter has a single embedded iovec - nothing to do: 17351c6fdbd8SKent Overstreet */ 17361c6fdbd8SKent Overstreet if (iter_is_ubuf(&dio->iter)) 17371c6fdbd8SKent Overstreet return 0; 17381c6fdbd8SKent Overstreet 17391c6fdbd8SKent Overstreet /* 17401c6fdbd8SKent Overstreet * We don't currently handle non-iovec iov_iters here - return an error, 17411c6fdbd8SKent Overstreet * and we'll fall back to doing the IO synchronously: 17421c6fdbd8SKent Overstreet */ 17431c6fdbd8SKent Overstreet if (!iter_is_iovec(&dio->iter)) 17441c6fdbd8SKent Overstreet return -1; 17451c6fdbd8SKent Overstreet 17461c6fdbd8SKent Overstreet if (dio->iter.nr_segs > ARRAY_SIZE(dio->inline_vecs)) { 17471c6fdbd8SKent Overstreet iov = kmalloc_array(dio->iter.nr_segs, sizeof(*iov), 17481c6fdbd8SKent Overstreet GFP_KERNEL); 17491c6fdbd8SKent Overstreet if (unlikely(!iov)) 17501c6fdbd8SKent Overstreet return -ENOMEM; 17511c6fdbd8SKent Overstreet 17521c6fdbd8SKent Overstreet dio->free_iov = true; 17531c6fdbd8SKent Overstreet } 17541c6fdbd8SKent Overstreet 17551c6fdbd8SKent Overstreet memcpy(iov, dio->iter.__iov, dio->iter.nr_segs * sizeof(*iov)); 17561c6fdbd8SKent Overstreet dio->iter.__iov = iov; 17571c6fdbd8SKent Overstreet return 0; 17581c6fdbd8SKent Overstreet } 17591c6fdbd8SKent Overstreet 17601c6fdbd8SKent Overstreet static long bch2_dio_write_loop(struct dio_write *dio) 17611c6fdbd8SKent Overstreet { 1762ed484030SKent Overstreet bool kthread = (current->flags & PF_KTHREAD) != 0; 17639a3df993SKent Overstreet struct bch_fs *c = dio->op.c; 17641c6fdbd8SKent Overstreet struct kiocb *req = dio->req; 17651c6fdbd8SKent Overstreet struct address_space *mapping = req->ki_filp->f_mapping; 17669a3df993SKent Overstreet struct bch_inode_info *inode = file_bch_inode(req->ki_filp); 17679a3df993SKent Overstreet struct bio *bio = &dio->op.wbio.bio; 17681c6fdbd8SKent Overstreet struct bvec_iter_all iter; 17691c6fdbd8SKent Overstreet struct bio_vec *bv; 17700a426c32SKent Overstreet unsigned unaligned; 17719a3df993SKent Overstreet u64 new_i_size; 17721c6fdbd8SKent Overstreet bool sync; 17731c6fdbd8SKent Overstreet long ret; 17741c6fdbd8SKent Overstreet 17751c6fdbd8SKent Overstreet if (dio->loop) 17761c6fdbd8SKent Overstreet goto loop; 17771c6fdbd8SKent Overstreet 17781c6fdbd8SKent Overstreet while (1) { 1779ed484030SKent Overstreet if (kthread) 1780ed484030SKent Overstreet kthread_use_mm(dio->mm); 17811c6fdbd8SKent Overstreet BUG_ON(current->faults_disabled_mapping); 17821c6fdbd8SKent Overstreet current->faults_disabled_mapping = mapping; 17831c6fdbd8SKent Overstreet 17841c6fdbd8SKent Overstreet ret = bio_iov_iter_get_pages(bio, &dio->iter); 17851c6fdbd8SKent Overstreet 17861c6fdbd8SKent Overstreet current->faults_disabled_mapping = NULL; 1787ed484030SKent Overstreet if (kthread) 1788ed484030SKent Overstreet kthread_unuse_mm(dio->mm); 17891c6fdbd8SKent Overstreet 17901c6fdbd8SKent Overstreet if (unlikely(ret < 0)) 17911c6fdbd8SKent Overstreet goto err; 17921c6fdbd8SKent Overstreet 17930a426c32SKent Overstreet unaligned = bio->bi_iter.bi_size & (block_bytes(c) - 1); 17940a426c32SKent Overstreet bio->bi_iter.bi_size -= unaligned; 17950a426c32SKent Overstreet iov_iter_revert(&dio->iter, unaligned); 17960a426c32SKent Overstreet 17970a426c32SKent Overstreet if (!bio->bi_iter.bi_size) { 17980a426c32SKent Overstreet /* 17990a426c32SKent Overstreet * bio_iov_iter_get_pages was only able to get < 18000a426c32SKent Overstreet * blocksize worth of pages: 18010a426c32SKent Overstreet */ 18020a426c32SKent Overstreet bio_for_each_segment_all(bv, bio, iter) 18030a426c32SKent Overstreet put_page(bv->bv_page); 18040a426c32SKent Overstreet ret = -EFAULT; 18050a426c32SKent Overstreet goto err; 18060a426c32SKent Overstreet } 18070a426c32SKent Overstreet 180854847d25SKent Overstreet dio->op.pos = POS(inode->v.i_ino, 180954847d25SKent Overstreet (req->ki_pos >> 9) + dio->op.written); 18101c6fdbd8SKent Overstreet 18111c6fdbd8SKent Overstreet task_io_account_write(bio->bi_iter.bi_size); 18121c6fdbd8SKent Overstreet 18131c6fdbd8SKent Overstreet if (!dio->sync && !dio->loop && dio->iter.count) { 18141c6fdbd8SKent Overstreet if (bch2_dio_write_copy_iov(dio)) { 1815f8f30863SKent Overstreet dio->sync = true; 1816f8f30863SKent Overstreet goto do_io; 18171c6fdbd8SKent Overstreet } 18181c6fdbd8SKent Overstreet } 1819f8f30863SKent Overstreet do_io: 18201c6fdbd8SKent Overstreet dio->loop = true; 1821f8f30863SKent Overstreet closure_call(&dio->op.cl, bch2_write, NULL, NULL); 18221c6fdbd8SKent Overstreet 1823f8f30863SKent Overstreet if (dio->sync) 1824f8f30863SKent Overstreet wait_for_completion(&dio->done); 1825f8f30863SKent Overstreet else 18261c6fdbd8SKent Overstreet return -EIOCBQUEUED; 18271c6fdbd8SKent Overstreet loop: 18289a3df993SKent Overstreet i_sectors_acct(c, inode, &dio->quota_res, 18299a3df993SKent Overstreet dio->op.i_sectors_delta); 18309a3df993SKent Overstreet dio->op.i_sectors_delta = 0; 18319a3df993SKent Overstreet 18329a3df993SKent Overstreet new_i_size = req->ki_pos + ((u64) dio->op.written << 9); 18339a3df993SKent Overstreet 18349a3df993SKent Overstreet spin_lock(&inode->v.i_lock); 18359a3df993SKent Overstreet if (new_i_size > inode->v.i_size) 18369a3df993SKent Overstreet i_size_write(&inode->v, new_i_size); 18379a3df993SKent Overstreet spin_unlock(&inode->v.i_lock); 18389a3df993SKent Overstreet 18391c6fdbd8SKent Overstreet bio_for_each_segment_all(bv, bio, iter) 18401c6fdbd8SKent Overstreet put_page(bv->bv_page); 18419a3df993SKent Overstreet if (!dio->iter.count || dio->op.error) 18421c6fdbd8SKent Overstreet break; 1843f8f30863SKent Overstreet 18441c6fdbd8SKent Overstreet bio_reset(bio, NULL, REQ_OP_WRITE); 1845f8f30863SKent Overstreet reinit_completion(&dio->done); 18461c6fdbd8SKent Overstreet } 18471c6fdbd8SKent Overstreet 18489a3df993SKent Overstreet ret = dio->op.error ?: ((long) dio->op.written << 9); 18491c6fdbd8SKent Overstreet err: 18501c6fdbd8SKent Overstreet bch2_pagecache_block_put(&inode->ei_pagecache_lock); 18519a3df993SKent Overstreet bch2_disk_reservation_put(c, &dio->op.res); 18520a426c32SKent Overstreet bch2_quota_reservation_put(c, inode, &dio->quota_res); 18531c6fdbd8SKent Overstreet 18541c6fdbd8SKent Overstreet if (dio->free_iov) 18551c6fdbd8SKent Overstreet kfree(dio->iter.__iov); 18561c6fdbd8SKent Overstreet 18571c6fdbd8SKent Overstreet sync = dio->sync; 18581c6fdbd8SKent Overstreet bio_put(bio); 18591c6fdbd8SKent Overstreet 18601c6fdbd8SKent Overstreet /* inode->i_dio_count is our ref on inode and thus bch_fs */ 18611c6fdbd8SKent Overstreet inode_dio_end(&inode->v); 18621c6fdbd8SKent Overstreet 18631c6fdbd8SKent Overstreet if (!sync) { 18641c6fdbd8SKent Overstreet req->ki_complete(req, ret); 18651c6fdbd8SKent Overstreet ret = -EIOCBQUEUED; 18661c6fdbd8SKent Overstreet } 18671c6fdbd8SKent Overstreet return ret; 18681c6fdbd8SKent Overstreet } 18691c6fdbd8SKent Overstreet 1870f8f30863SKent Overstreet static void bch2_dio_write_loop_async(struct bch_write_op *op) 18711c6fdbd8SKent Overstreet { 1872f8f30863SKent Overstreet struct dio_write *dio = container_of(op, struct dio_write, op); 18731c6fdbd8SKent Overstreet 1874f8f30863SKent Overstreet if (dio->sync) 1875f8f30863SKent Overstreet complete(&dio->done); 1876f8f30863SKent Overstreet else 18771c6fdbd8SKent Overstreet bch2_dio_write_loop(dio); 18781c6fdbd8SKent Overstreet } 18791c6fdbd8SKent Overstreet 18801c6fdbd8SKent Overstreet static noinline 18811c6fdbd8SKent Overstreet ssize_t bch2_direct_write(struct kiocb *req, struct iov_iter *iter) 18821c6fdbd8SKent Overstreet { 18831c6fdbd8SKent Overstreet struct file *file = req->ki_filp; 188454847d25SKent Overstreet struct address_space *mapping = file->f_mapping; 18851c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 18861c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 18879a3df993SKent Overstreet struct bch_io_opts opts = io_opts(c, &inode->ei_inode); 18881c6fdbd8SKent Overstreet struct dio_write *dio; 18891c6fdbd8SKent Overstreet struct bio *bio; 18907edcfbfeSKent Overstreet bool locked = true, extending; 18911c6fdbd8SKent Overstreet ssize_t ret; 18921c6fdbd8SKent Overstreet 18937edcfbfeSKent Overstreet prefetch(&c->opts); 18947edcfbfeSKent Overstreet prefetch((void *) &c->opts + 64); 18957edcfbfeSKent Overstreet prefetch(&inode->ei_inode); 18967edcfbfeSKent Overstreet prefetch((void *) &inode->ei_inode + 64); 18971c6fdbd8SKent Overstreet 18987edcfbfeSKent Overstreet inode_lock(&inode->v); 18997edcfbfeSKent Overstreet 19007edcfbfeSKent Overstreet ret = generic_write_checks(req, iter); 19017edcfbfeSKent Overstreet if (unlikely(ret <= 0)) 19027edcfbfeSKent Overstreet goto err; 19037edcfbfeSKent Overstreet 19047edcfbfeSKent Overstreet ret = file_remove_privs(file); 19057edcfbfeSKent Overstreet if (unlikely(ret)) 19067edcfbfeSKent Overstreet goto err; 19077edcfbfeSKent Overstreet 19087edcfbfeSKent Overstreet ret = file_update_time(file); 19097edcfbfeSKent Overstreet if (unlikely(ret)) 19107edcfbfeSKent Overstreet goto err; 19111c6fdbd8SKent Overstreet 1912919dbbd1SKent Overstreet if (unlikely((req->ki_pos|iter->count) & (block_bytes(c) - 1))) 19137edcfbfeSKent Overstreet goto err; 19147edcfbfeSKent Overstreet 19157edcfbfeSKent Overstreet inode_dio_begin(&inode->v); 19167edcfbfeSKent Overstreet bch2_pagecache_block_get(&inode->ei_pagecache_lock); 19177edcfbfeSKent Overstreet 19187edcfbfeSKent Overstreet extending = req->ki_pos + iter->count > inode->v.i_size; 19197edcfbfeSKent Overstreet if (!extending) { 19207edcfbfeSKent Overstreet inode_unlock(&inode->v); 19217edcfbfeSKent Overstreet locked = false; 19227edcfbfeSKent Overstreet } 19231c6fdbd8SKent Overstreet 19241c6fdbd8SKent Overstreet bio = bio_alloc_bioset(NULL, 19251c6fdbd8SKent Overstreet iov_iter_npages(iter, BIO_MAX_VECS), 19261c6fdbd8SKent Overstreet REQ_OP_WRITE, 19271c6fdbd8SKent Overstreet GFP_KERNEL, 19281c6fdbd8SKent Overstreet &c->dio_write_bioset); 19299a3df993SKent Overstreet dio = container_of(bio, struct dio_write, op.wbio.bio); 1930f8f30863SKent Overstreet init_completion(&dio->done); 19311c6fdbd8SKent Overstreet dio->req = req; 1932ed484030SKent Overstreet dio->mm = current->mm; 19331c6fdbd8SKent Overstreet dio->loop = false; 19347edcfbfeSKent Overstreet dio->sync = is_sync_kiocb(req) || extending; 19351c6fdbd8SKent Overstreet dio->free_iov = false; 19361c6fdbd8SKent Overstreet dio->quota_res.sectors = 0; 19371c6fdbd8SKent Overstreet dio->iter = *iter; 19389a3df993SKent Overstreet 19399a3df993SKent Overstreet bch2_write_op_init(&dio->op, c, opts); 1940f8f30863SKent Overstreet dio->op.end_io = bch2_dio_write_loop_async; 19419a3df993SKent Overstreet dio->op.target = opts.foreground_target; 19429a3df993SKent Overstreet op_journal_seq_set(&dio->op, &inode->ei_journal_seq); 19439a3df993SKent Overstreet dio->op.write_point = writepoint_hashed((unsigned long) current); 19449a3df993SKent Overstreet dio->op.flags |= BCH_WRITE_NOPUT_RESERVATION; 19451c6fdbd8SKent Overstreet 19461c6fdbd8SKent Overstreet if ((req->ki_flags & IOCB_DSYNC) && 19471c6fdbd8SKent Overstreet !c->opts.journal_flush_disabled) 19489a3df993SKent Overstreet dio->op.flags |= BCH_WRITE_FLUSH; 19491c6fdbd8SKent Overstreet 19501c6fdbd8SKent Overstreet ret = bch2_quota_reservation_add(c, inode, &dio->quota_res, 19511c6fdbd8SKent Overstreet iter->count >> 9, true); 19521c6fdbd8SKent Overstreet if (unlikely(ret)) 19537edcfbfeSKent Overstreet goto err_put_bio; 19541c6fdbd8SKent Overstreet 19559a3df993SKent Overstreet dio->op.nr_replicas = dio->op.opts.data_replicas; 19567ef2a73aSKent Overstreet 19579a3df993SKent Overstreet ret = bch2_disk_reservation_get(c, &dio->op.res, iter->count >> 9, 19589a3df993SKent Overstreet dio->op.opts.data_replicas, 0); 19599a3df993SKent Overstreet if (unlikely(ret) && 19609a3df993SKent Overstreet !bch2_check_range_allocated(c, POS(inode->v.i_ino, 1961919dbbd1SKent Overstreet req->ki_pos >> 9), 19627ef2a73aSKent Overstreet iter->count >> 9, 19639a3df993SKent Overstreet dio->op.opts.data_replicas)) 19647edcfbfeSKent Overstreet goto err_put_bio; 19651c6fdbd8SKent Overstreet 1966a023127aSKent Overstreet if (unlikely(mapping->nrpages)) { 196754847d25SKent Overstreet ret = write_invalidate_inode_pages_range(mapping, 196854847d25SKent Overstreet req->ki_pos, 196954847d25SKent Overstreet req->ki_pos + iter->count - 1); 197054847d25SKent Overstreet if (unlikely(ret)) 197154847d25SKent Overstreet goto err_put_bio; 1972a023127aSKent Overstreet } 197354847d25SKent Overstreet 19747edcfbfeSKent Overstreet ret = bch2_dio_write_loop(dio); 19751c6fdbd8SKent Overstreet err: 19767edcfbfeSKent Overstreet if (locked) 19777edcfbfeSKent Overstreet inode_unlock(&inode->v); 19787edcfbfeSKent Overstreet if (ret > 0) 19797edcfbfeSKent Overstreet req->ki_pos += ret; 19807edcfbfeSKent Overstreet return ret; 19817edcfbfeSKent Overstreet err_put_bio: 19827edcfbfeSKent Overstreet bch2_pagecache_block_put(&inode->ei_pagecache_lock); 19839a3df993SKent Overstreet bch2_disk_reservation_put(c, &dio->op.res); 19841c6fdbd8SKent Overstreet bch2_quota_reservation_put(c, inode, &dio->quota_res); 19851c6fdbd8SKent Overstreet bio_put(bio); 19867edcfbfeSKent Overstreet inode_dio_end(&inode->v); 19877edcfbfeSKent Overstreet goto err; 19881c6fdbd8SKent Overstreet } 19891c6fdbd8SKent Overstreet 19907edcfbfeSKent Overstreet ssize_t bch2_write_iter(struct kiocb *iocb, struct iov_iter *from) 19911c6fdbd8SKent Overstreet { 19921c6fdbd8SKent Overstreet struct file *file = iocb->ki_filp; 19937edcfbfeSKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 19941c6fdbd8SKent Overstreet ssize_t ret; 19951c6fdbd8SKent Overstreet 19961c6fdbd8SKent Overstreet if (iocb->ki_flags & IOCB_DIRECT) 19971c6fdbd8SKent Overstreet return bch2_direct_write(iocb, from); 19981c6fdbd8SKent Overstreet 19997edcfbfeSKent Overstreet inode_lock(&inode->v); 20007edcfbfeSKent Overstreet 20017edcfbfeSKent Overstreet ret = generic_write_checks(iocb, from); 20027edcfbfeSKent Overstreet if (ret <= 0) 20037edcfbfeSKent Overstreet goto unlock; 20047edcfbfeSKent Overstreet 20051c6fdbd8SKent Overstreet ret = file_remove_privs(file); 20061c6fdbd8SKent Overstreet if (ret) 20077edcfbfeSKent Overstreet goto unlock; 20081c6fdbd8SKent Overstreet 20091c6fdbd8SKent Overstreet ret = file_update_time(file); 20101c6fdbd8SKent Overstreet if (ret) 20117edcfbfeSKent Overstreet goto unlock; 20121c6fdbd8SKent Overstreet 20137edcfbfeSKent Overstreet ret = bch2_buffered_write(iocb, from); 20141c6fdbd8SKent Overstreet if (likely(ret > 0)) 20151c6fdbd8SKent Overstreet iocb->ki_pos += ret; 20167edcfbfeSKent Overstreet unlock: 20171c6fdbd8SKent Overstreet inode_unlock(&inode->v); 20181c6fdbd8SKent Overstreet 20197edcfbfeSKent Overstreet if (ret > 0) 20201c6fdbd8SKent Overstreet ret = generic_write_sync(iocb, ret); 20211c6fdbd8SKent Overstreet 20221c6fdbd8SKent Overstreet return ret; 20231c6fdbd8SKent Overstreet } 20241c6fdbd8SKent Overstreet 20251c6fdbd8SKent Overstreet /* fsync: */ 20261c6fdbd8SKent Overstreet 20271c6fdbd8SKent Overstreet int bch2_fsync(struct file *file, loff_t start, loff_t end, int datasync) 20281c6fdbd8SKent Overstreet { 20291c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 20301c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 2031bb1b3658SKent Overstreet int ret, ret2; 20321c6fdbd8SKent Overstreet 20331c6fdbd8SKent Overstreet ret = file_write_and_wait_range(file, start, end); 20341c6fdbd8SKent Overstreet if (ret) 20351c6fdbd8SKent Overstreet return ret; 20361c6fdbd8SKent Overstreet 20371c6fdbd8SKent Overstreet if (datasync && !(inode->v.i_state & I_DIRTY_DATASYNC)) 20381c6fdbd8SKent Overstreet goto out; 20391c6fdbd8SKent Overstreet 20401c6fdbd8SKent Overstreet ret = sync_inode_metadata(&inode->v, 1); 20411c6fdbd8SKent Overstreet if (ret) 20421c6fdbd8SKent Overstreet return ret; 20431c6fdbd8SKent Overstreet out: 204475812e70SKent Overstreet if (!c->opts.journal_flush_disabled) 204575812e70SKent Overstreet ret = bch2_journal_flush_seq(&c->journal, 204675812e70SKent Overstreet inode->ei_journal_seq); 2047bb1b3658SKent Overstreet ret2 = file_check_and_advance_wb_err(file); 2048bb1b3658SKent Overstreet 2049bb1b3658SKent Overstreet return ret ?: ret2; 20501c6fdbd8SKent Overstreet } 20511c6fdbd8SKent Overstreet 20521c6fdbd8SKent Overstreet /* truncate: */ 20531c6fdbd8SKent Overstreet 20541c6fdbd8SKent Overstreet static inline int range_has_data(struct bch_fs *c, 20551c6fdbd8SKent Overstreet struct bpos start, 20561c6fdbd8SKent Overstreet struct bpos end) 20571c6fdbd8SKent Overstreet { 2058424eb881SKent Overstreet struct btree_trans trans; 2059424eb881SKent Overstreet struct btree_iter *iter; 20601c6fdbd8SKent Overstreet struct bkey_s_c k; 20611c6fdbd8SKent Overstreet int ret = 0; 20621c6fdbd8SKent Overstreet 206320bceecbSKent Overstreet bch2_trans_init(&trans, c, 0, 0); 2064424eb881SKent Overstreet 206594f651e2SKent Overstreet for_each_btree_key(&trans, iter, BTREE_ID_EXTENTS, start, 0, k, ret) { 20661c6fdbd8SKent Overstreet if (bkey_cmp(bkey_start_pos(k.k), end) >= 0) 20671c6fdbd8SKent Overstreet break; 20681c6fdbd8SKent Overstreet 20691c6fdbd8SKent Overstreet if (bkey_extent_is_data(k.k)) { 20701c6fdbd8SKent Overstreet ret = 1; 20711c6fdbd8SKent Overstreet break; 20721c6fdbd8SKent Overstreet } 20731c6fdbd8SKent Overstreet } 20741c6fdbd8SKent Overstreet 2075424eb881SKent Overstreet return bch2_trans_exit(&trans) ?: ret; 20761c6fdbd8SKent Overstreet } 20771c6fdbd8SKent Overstreet 20781c6fdbd8SKent Overstreet static int __bch2_truncate_page(struct bch_inode_info *inode, 20791c6fdbd8SKent Overstreet pgoff_t index, loff_t start, loff_t end) 20801c6fdbd8SKent Overstreet { 20811c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 20821c6fdbd8SKent Overstreet struct address_space *mapping = inode->v.i_mapping; 2083a99b1cafSKent Overstreet struct bch_page_state *s; 20841c6fdbd8SKent Overstreet unsigned start_offset = start & (PAGE_SIZE - 1); 20851c6fdbd8SKent Overstreet unsigned end_offset = ((end - 1) & (PAGE_SIZE - 1)) + 1; 2086a99b1cafSKent Overstreet unsigned i; 20871c6fdbd8SKent Overstreet struct page *page; 20881c6fdbd8SKent Overstreet int ret = 0; 20891c6fdbd8SKent Overstreet 20901c6fdbd8SKent Overstreet /* Page boundary? Nothing to do */ 20911c6fdbd8SKent Overstreet if (!((index == start >> PAGE_SHIFT && start_offset) || 20921c6fdbd8SKent Overstreet (index == end >> PAGE_SHIFT && end_offset != PAGE_SIZE))) 20931c6fdbd8SKent Overstreet return 0; 20941c6fdbd8SKent Overstreet 20951c6fdbd8SKent Overstreet /* Above i_size? */ 20961c6fdbd8SKent Overstreet if (index << PAGE_SHIFT >= inode->v.i_size) 20971c6fdbd8SKent Overstreet return 0; 20981c6fdbd8SKent Overstreet 20991c6fdbd8SKent Overstreet page = find_lock_page(mapping, index); 21001c6fdbd8SKent Overstreet if (!page) { 21011c6fdbd8SKent Overstreet /* 21021c6fdbd8SKent Overstreet * XXX: we're doing two index lookups when we end up reading the 21031c6fdbd8SKent Overstreet * page 21041c6fdbd8SKent Overstreet */ 21051c6fdbd8SKent Overstreet ret = range_has_data(c, 21061c6fdbd8SKent Overstreet POS(inode->v.i_ino, index << PAGE_SECTOR_SHIFT), 21071c6fdbd8SKent Overstreet POS(inode->v.i_ino, (index + 1) << PAGE_SECTOR_SHIFT)); 21081c6fdbd8SKent Overstreet if (ret <= 0) 21091c6fdbd8SKent Overstreet return ret; 21101c6fdbd8SKent Overstreet 21111c6fdbd8SKent Overstreet page = find_or_create_page(mapping, index, GFP_KERNEL); 21121c6fdbd8SKent Overstreet if (unlikely(!page)) { 21131c6fdbd8SKent Overstreet ret = -ENOMEM; 21141c6fdbd8SKent Overstreet goto out; 21151c6fdbd8SKent Overstreet } 21161c6fdbd8SKent Overstreet } 21171c6fdbd8SKent Overstreet 2118a99b1cafSKent Overstreet s = bch2_page_state_create(page, 0); 2119a99b1cafSKent Overstreet if (!s) { 2120a99b1cafSKent Overstreet ret = -ENOMEM; 2121a99b1cafSKent Overstreet goto unlock; 2122a99b1cafSKent Overstreet } 2123a99b1cafSKent Overstreet 21241c6fdbd8SKent Overstreet if (!PageUptodate(page)) { 21251c6fdbd8SKent Overstreet ret = bch2_read_single_page(page, mapping); 21261c6fdbd8SKent Overstreet if (ret) 21271c6fdbd8SKent Overstreet goto unlock; 21281c6fdbd8SKent Overstreet } 21291c6fdbd8SKent Overstreet 2130a99b1cafSKent Overstreet if (index != start >> PAGE_SHIFT) 2131a99b1cafSKent Overstreet start_offset = 0; 2132a99b1cafSKent Overstreet if (index != end >> PAGE_SHIFT) 2133a99b1cafSKent Overstreet end_offset = PAGE_SIZE; 2134a99b1cafSKent Overstreet 2135a99b1cafSKent Overstreet for (i = round_up(start_offset, block_bytes(c)) >> 9; 2136a99b1cafSKent Overstreet i < round_down(end_offset, block_bytes(c)) >> 9; 2137a99b1cafSKent Overstreet i++) { 2138a99b1cafSKent Overstreet s->s[i].nr_replicas = 0; 2139a99b1cafSKent Overstreet s->s[i].state = SECTOR_UNALLOCATED; 2140a99b1cafSKent Overstreet } 2141a99b1cafSKent Overstreet 2142a99b1cafSKent Overstreet zero_user_segment(page, start_offset, end_offset); 2143a99b1cafSKent Overstreet 21441c6fdbd8SKent Overstreet /* 21451c6fdbd8SKent Overstreet * Bit of a hack - we don't want truncate to fail due to -ENOSPC. 21461c6fdbd8SKent Overstreet * 21471c6fdbd8SKent Overstreet * XXX: because we aren't currently tracking whether the page has actual 21481c6fdbd8SKent Overstreet * data in it (vs. just 0s, or only partially written) this wrong. ick. 21491c6fdbd8SKent Overstreet */ 2150d1542e03SKent Overstreet ret = bch2_get_page_disk_reservation(c, inode, page, false); 21511c6fdbd8SKent Overstreet BUG_ON(ret); 21521c6fdbd8SKent Overstreet 2153d1542e03SKent Overstreet filemap_dirty_folio(mapping, page_folio(page)); 21541c6fdbd8SKent Overstreet unlock: 21551c6fdbd8SKent Overstreet unlock_page(page); 21561c6fdbd8SKent Overstreet put_page(page); 21571c6fdbd8SKent Overstreet out: 21581c6fdbd8SKent Overstreet return ret; 21591c6fdbd8SKent Overstreet } 21601c6fdbd8SKent Overstreet 21611c6fdbd8SKent Overstreet static int bch2_truncate_page(struct bch_inode_info *inode, loff_t from) 21621c6fdbd8SKent Overstreet { 21631c6fdbd8SKent Overstreet return __bch2_truncate_page(inode, from >> PAGE_SHIFT, 2164a99b1cafSKent Overstreet from, round_up(from, PAGE_SIZE)); 21651c6fdbd8SKent Overstreet } 21661c6fdbd8SKent Overstreet 2167e0541a93SKent Overstreet static int bch2_extend(struct bch_inode_info *inode, 2168e0541a93SKent Overstreet struct bch_inode_unpacked *inode_u, 2169e0541a93SKent Overstreet struct iattr *iattr) 21701c6fdbd8SKent Overstreet { 21711c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 21721c6fdbd8SKent Overstreet struct address_space *mapping = inode->v.i_mapping; 21731c6fdbd8SKent Overstreet int ret; 21741c6fdbd8SKent Overstreet 2175e0541a93SKent Overstreet /* 2176e0541a93SKent Overstreet * sync appends: 21772925fc49SKent Overstreet * 21782925fc49SKent Overstreet * this has to be done _before_ extending i_size: 2179e0541a93SKent Overstreet */ 2180e0541a93SKent Overstreet ret = filemap_write_and_wait_range(mapping, inode_u->bi_size, S64_MAX); 21811c6fdbd8SKent Overstreet if (ret) 21821c6fdbd8SKent Overstreet return ret; 21831c6fdbd8SKent Overstreet 21841c6fdbd8SKent Overstreet truncate_setsize(&inode->v, iattr->ia_size); 21851c6fdbd8SKent Overstreet /* ATTR_MODE will never be set here, ns argument isn't needed: */ 21861c6fdbd8SKent Overstreet setattr_copy(NULL, &inode->v, iattr); 21871c6fdbd8SKent Overstreet 21881c6fdbd8SKent Overstreet mutex_lock(&inode->ei_update_lock); 21892ea90048SKent Overstreet ret = bch2_write_inode_size(c, inode, inode->v.i_size, 21902ea90048SKent Overstreet ATTR_MTIME|ATTR_CTIME); 21911c6fdbd8SKent Overstreet mutex_unlock(&inode->ei_update_lock); 21921c6fdbd8SKent Overstreet 21931c6fdbd8SKent Overstreet return ret; 21941c6fdbd8SKent Overstreet } 21951c6fdbd8SKent Overstreet 219654e2264eSKent Overstreet static int bch2_truncate_finish_fn(struct bch_inode_info *inode, 219754e2264eSKent Overstreet struct bch_inode_unpacked *bi, 219854e2264eSKent Overstreet void *p) 219954e2264eSKent Overstreet { 220054e2264eSKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 220154e2264eSKent Overstreet 220254e2264eSKent Overstreet bi->bi_flags &= ~BCH_INODE_I_SIZE_DIRTY; 220354e2264eSKent Overstreet bi->bi_mtime = bi->bi_ctime = bch2_current_time(c); 220454e2264eSKent Overstreet return 0; 220554e2264eSKent Overstreet } 220654e2264eSKent Overstreet 220754e2264eSKent Overstreet static int bch2_truncate_start_fn(struct bch_inode_info *inode, 220854e2264eSKent Overstreet struct bch_inode_unpacked *bi, void *p) 220954e2264eSKent Overstreet { 221054e2264eSKent Overstreet u64 *new_i_size = p; 221154e2264eSKent Overstreet 221254e2264eSKent Overstreet bi->bi_flags |= BCH_INODE_I_SIZE_DIRTY; 221354e2264eSKent Overstreet bi->bi_size = *new_i_size; 221454e2264eSKent Overstreet return 0; 221554e2264eSKent Overstreet } 221654e2264eSKent Overstreet 22171c6fdbd8SKent Overstreet int bch2_truncate(struct bch_inode_info *inode, struct iattr *iattr) 22181c6fdbd8SKent Overstreet { 22191c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 22201c6fdbd8SKent Overstreet struct address_space *mapping = inode->v.i_mapping; 2221e0541a93SKent Overstreet struct bch_inode_unpacked inode_u; 2222e0541a93SKent Overstreet struct btree_trans trans; 2223e0541a93SKent Overstreet struct btree_iter *iter; 222454e2264eSKent Overstreet u64 new_i_size = iattr->ia_size; 22252e87eae1SKent Overstreet s64 i_sectors_delta = 0; 22261c6fdbd8SKent Overstreet int ret = 0; 22271c6fdbd8SKent Overstreet 22281c6fdbd8SKent Overstreet inode_dio_wait(&inode->v); 22291c6fdbd8SKent Overstreet bch2_pagecache_block_get(&inode->ei_pagecache_lock); 22301c6fdbd8SKent Overstreet 2231e0541a93SKent Overstreet /* 2232e0541a93SKent Overstreet * fetch current on disk i_size: inode is locked, i_size can only 2233e0541a93SKent Overstreet * increase underneath us: 2234e0541a93SKent Overstreet */ 2235e0541a93SKent Overstreet bch2_trans_init(&trans, c, 0, 0); 2236e0541a93SKent Overstreet iter = bch2_inode_peek(&trans, &inode_u, inode->v.i_ino, 0); 2237e0541a93SKent Overstreet ret = PTR_ERR_OR_ZERO(iter); 2238e0541a93SKent Overstreet bch2_trans_exit(&trans); 22391c6fdbd8SKent Overstreet 2240e0541a93SKent Overstreet if (ret) 2241e0541a93SKent Overstreet goto err; 22421c6fdbd8SKent Overstreet 2243e0541a93SKent Overstreet BUG_ON(inode->v.i_size < inode_u.bi_size); 2244e0541a93SKent Overstreet 2245e0541a93SKent Overstreet if (iattr->ia_size > inode->v.i_size) { 2246e0541a93SKent Overstreet ret = bch2_extend(inode, &inode_u, iattr); 224754e2264eSKent Overstreet goto err; 22481c6fdbd8SKent Overstreet } 22491c6fdbd8SKent Overstreet 22501c6fdbd8SKent Overstreet ret = bch2_truncate_page(inode, iattr->ia_size); 22511c6fdbd8SKent Overstreet if (unlikely(ret)) 225254e2264eSKent Overstreet goto err; 22531c6fdbd8SKent Overstreet 22546cc3535dSKent Overstreet /* 22556cc3535dSKent Overstreet * When extending, we're going to write the new i_size to disk 22566cc3535dSKent Overstreet * immediately so we need to flush anything above the current on disk 22576cc3535dSKent Overstreet * i_size first: 22586cc3535dSKent Overstreet * 22596cc3535dSKent Overstreet * Also, when extending we need to flush the page that i_size currently 22606cc3535dSKent Overstreet * straddles - if it's mapped to userspace, we need to ensure that 22616cc3535dSKent Overstreet * userspace has to redirty it and call .mkwrite -> set_page_dirty 22626cc3535dSKent Overstreet * again to allocate the part of the page that was extended. 22636cc3535dSKent Overstreet */ 2264e0541a93SKent Overstreet if (iattr->ia_size > inode_u.bi_size) 22651c6fdbd8SKent Overstreet ret = filemap_write_and_wait_range(mapping, 2266e0541a93SKent Overstreet inode_u.bi_size, 22671c6fdbd8SKent Overstreet iattr->ia_size - 1); 22681c6fdbd8SKent Overstreet else if (iattr->ia_size & (PAGE_SIZE - 1)) 22691c6fdbd8SKent Overstreet ret = filemap_write_and_wait_range(mapping, 22701c6fdbd8SKent Overstreet round_down(iattr->ia_size, PAGE_SIZE), 22711c6fdbd8SKent Overstreet iattr->ia_size - 1); 22721c6fdbd8SKent Overstreet if (ret) 227354e2264eSKent Overstreet goto err; 22741c6fdbd8SKent Overstreet 227554e2264eSKent Overstreet mutex_lock(&inode->ei_update_lock); 227654e2264eSKent Overstreet ret = bch2_write_inode(c, inode, bch2_truncate_start_fn, 227754e2264eSKent Overstreet &new_i_size, 0); 227854e2264eSKent Overstreet mutex_unlock(&inode->ei_update_lock); 22791c6fdbd8SKent Overstreet 22801c6fdbd8SKent Overstreet if (unlikely(ret)) 228154e2264eSKent Overstreet goto err; 22821c6fdbd8SKent Overstreet 22831c6fdbd8SKent Overstreet truncate_setsize(&inode->v, iattr->ia_size); 22841c6fdbd8SKent Overstreet 22852e87eae1SKent Overstreet ret = bch2_fpunch(c, inode->v.i_ino, 2286a99b1cafSKent Overstreet round_up(iattr->ia_size, block_bytes(c)) >> 9, 22872e87eae1SKent Overstreet U64_MAX, &inode->ei_journal_seq, &i_sectors_delta); 22882e87eae1SKent Overstreet i_sectors_acct(c, inode, NULL, i_sectors_delta); 22892e87eae1SKent Overstreet 22901c6fdbd8SKent Overstreet if (unlikely(ret)) 229154e2264eSKent Overstreet goto err; 22921c6fdbd8SKent Overstreet 22931c6fdbd8SKent Overstreet /* ATTR_MODE will never be set here, ns argument isn't needed: */ 22941c6fdbd8SKent Overstreet setattr_copy(NULL, &inode->v, iattr); 229554e2264eSKent Overstreet 229654e2264eSKent Overstreet mutex_lock(&inode->ei_update_lock); 229754e2264eSKent Overstreet ret = bch2_write_inode(c, inode, bch2_truncate_finish_fn, NULL, 229854e2264eSKent Overstreet ATTR_MTIME|ATTR_CTIME); 229954e2264eSKent Overstreet mutex_unlock(&inode->ei_update_lock); 230054e2264eSKent Overstreet err: 23011c6fdbd8SKent Overstreet bch2_pagecache_block_put(&inode->ei_pagecache_lock); 23021c6fdbd8SKent Overstreet return ret; 23031c6fdbd8SKent Overstreet } 23041c6fdbd8SKent Overstreet 23051c6fdbd8SKent Overstreet /* fallocate: */ 23061c6fdbd8SKent Overstreet 23072e87eae1SKent Overstreet static long bchfs_fpunch(struct bch_inode_info *inode, loff_t offset, loff_t len) 23081c6fdbd8SKent Overstreet { 23091c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 2310a99b1cafSKent Overstreet u64 discard_start = round_up(offset, block_bytes(c)) >> 9; 2311a99b1cafSKent Overstreet u64 discard_end = round_down(offset + len, block_bytes(c)) >> 9; 23121c6fdbd8SKent Overstreet int ret = 0; 23131c6fdbd8SKent Overstreet 23141c6fdbd8SKent Overstreet inode_lock(&inode->v); 23151c6fdbd8SKent Overstreet inode_dio_wait(&inode->v); 23161c6fdbd8SKent Overstreet bch2_pagecache_block_get(&inode->ei_pagecache_lock); 23171c6fdbd8SKent Overstreet 23181c6fdbd8SKent Overstreet ret = __bch2_truncate_page(inode, 23191c6fdbd8SKent Overstreet offset >> PAGE_SHIFT, 23201c6fdbd8SKent Overstreet offset, offset + len); 23211c6fdbd8SKent Overstreet if (unlikely(ret)) 23221c6fdbd8SKent Overstreet goto err; 23231c6fdbd8SKent Overstreet 23241c6fdbd8SKent Overstreet if (offset >> PAGE_SHIFT != 23251c6fdbd8SKent Overstreet (offset + len) >> PAGE_SHIFT) { 23261c6fdbd8SKent Overstreet ret = __bch2_truncate_page(inode, 23271c6fdbd8SKent Overstreet (offset + len) >> PAGE_SHIFT, 23281c6fdbd8SKent Overstreet offset, offset + len); 23291c6fdbd8SKent Overstreet if (unlikely(ret)) 23301c6fdbd8SKent Overstreet goto err; 23311c6fdbd8SKent Overstreet } 23321c6fdbd8SKent Overstreet 23331c6fdbd8SKent Overstreet truncate_pagecache_range(&inode->v, offset, offset + len - 1); 23341c6fdbd8SKent Overstreet 23352e87eae1SKent Overstreet if (discard_start < discard_end) { 23362e87eae1SKent Overstreet s64 i_sectors_delta = 0; 23372e87eae1SKent Overstreet 23382e87eae1SKent Overstreet ret = bch2_fpunch(c, inode->v.i_ino, 23392e87eae1SKent Overstreet discard_start, discard_end, 23402e87eae1SKent Overstreet &inode->ei_journal_seq, 23412e87eae1SKent Overstreet &i_sectors_delta); 23422e87eae1SKent Overstreet i_sectors_acct(c, inode, NULL, i_sectors_delta); 23432e87eae1SKent Overstreet } 23441c6fdbd8SKent Overstreet err: 23451c6fdbd8SKent Overstreet bch2_pagecache_block_put(&inode->ei_pagecache_lock); 23461c6fdbd8SKent Overstreet inode_unlock(&inode->v); 23471c6fdbd8SKent Overstreet 23481c6fdbd8SKent Overstreet return ret; 23491c6fdbd8SKent Overstreet } 23501c6fdbd8SKent Overstreet 23512e87eae1SKent Overstreet static long bchfs_fcollapse_finsert(struct bch_inode_info *inode, 23525f786787SKent Overstreet loff_t offset, loff_t len, 23535f786787SKent Overstreet bool insert) 23541c6fdbd8SKent Overstreet { 23551c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 23561c6fdbd8SKent Overstreet struct address_space *mapping = inode->v.i_mapping; 2357d69f41d6SKent Overstreet struct btree_trans trans; 235863095894SKent Overstreet struct btree_iter *src, *dst, *del = NULL; 23595f786787SKent Overstreet loff_t shift, new_size; 23605f786787SKent Overstreet u64 src_start; 23611c6fdbd8SKent Overstreet int ret; 23621c6fdbd8SKent Overstreet 23631c6fdbd8SKent Overstreet if ((offset | len) & (block_bytes(c) - 1)) 23641c6fdbd8SKent Overstreet return -EINVAL; 23651c6fdbd8SKent Overstreet 236620bceecbSKent Overstreet bch2_trans_init(&trans, c, BTREE_ITER_MAX, 256); 23671c6fdbd8SKent Overstreet 23681c6fdbd8SKent Overstreet /* 23691c6fdbd8SKent Overstreet * We need i_mutex to keep the page cache consistent with the extents 23701c6fdbd8SKent Overstreet * btree, and the btree consistent with i_size - we don't need outside 23711c6fdbd8SKent Overstreet * locking for the extents btree itself, because we're using linked 23721c6fdbd8SKent Overstreet * iterators 23731c6fdbd8SKent Overstreet */ 23741c6fdbd8SKent Overstreet inode_lock(&inode->v); 23751c6fdbd8SKent Overstreet inode_dio_wait(&inode->v); 23761c6fdbd8SKent Overstreet bch2_pagecache_block_get(&inode->ei_pagecache_lock); 23771c6fdbd8SKent Overstreet 23785f786787SKent Overstreet if (insert) { 23795f786787SKent Overstreet ret = -EFBIG; 23805f786787SKent Overstreet if (inode->v.i_sb->s_maxbytes - inode->v.i_size < len) 23815f786787SKent Overstreet goto err; 23825f786787SKent Overstreet 23835f786787SKent Overstreet ret = -EINVAL; 23845f786787SKent Overstreet if (offset >= inode->v.i_size) 23855f786787SKent Overstreet goto err; 23865f786787SKent Overstreet 23875f786787SKent Overstreet src_start = U64_MAX; 23885f786787SKent Overstreet shift = len; 23895f786787SKent Overstreet } else { 23901c6fdbd8SKent Overstreet ret = -EINVAL; 23911c6fdbd8SKent Overstreet if (offset + len >= inode->v.i_size) 23921c6fdbd8SKent Overstreet goto err; 23931c6fdbd8SKent Overstreet 23945f786787SKent Overstreet src_start = offset + len; 23955f786787SKent Overstreet shift = -len; 23965f786787SKent Overstreet } 23971c6fdbd8SKent Overstreet 23985f786787SKent Overstreet new_size = inode->v.i_size + shift; 23991c6fdbd8SKent Overstreet 24001c6fdbd8SKent Overstreet ret = write_invalidate_inode_pages_range(mapping, offset, LLONG_MAX); 24011c6fdbd8SKent Overstreet if (ret) 24021c6fdbd8SKent Overstreet goto err; 24031c6fdbd8SKent Overstreet 24045f786787SKent Overstreet if (insert) { 24055f786787SKent Overstreet i_size_write(&inode->v, new_size); 24065f786787SKent Overstreet mutex_lock(&inode->ei_update_lock); 24075f786787SKent Overstreet ret = bch2_write_inode_size(c, inode, new_size, 24085f786787SKent Overstreet ATTR_MTIME|ATTR_CTIME); 24095f786787SKent Overstreet mutex_unlock(&inode->ei_update_lock); 24105f786787SKent Overstreet } else { 24112e87eae1SKent Overstreet s64 i_sectors_delta = 0; 24122e87eae1SKent Overstreet 24132e87eae1SKent Overstreet ret = bch2_fpunch(c, inode->v.i_ino, 24142e87eae1SKent Overstreet offset >> 9, (offset + len) >> 9, 24152e87eae1SKent Overstreet &inode->ei_journal_seq, 24162e87eae1SKent Overstreet &i_sectors_delta); 24172e87eae1SKent Overstreet i_sectors_acct(c, inode, NULL, i_sectors_delta); 24182e87eae1SKent Overstreet 241963095894SKent Overstreet if (ret) 242063095894SKent Overstreet goto err; 24215f786787SKent Overstreet } 24228ef231bdSKent Overstreet 24238ef231bdSKent Overstreet src = bch2_trans_get_iter(&trans, BTREE_ID_EXTENTS, 24245f786787SKent Overstreet POS(inode->v.i_ino, src_start >> 9), 242563095894SKent Overstreet BTREE_ITER_INTENT); 24268ef231bdSKent Overstreet BUG_ON(IS_ERR_OR_NULL(src)); 24271c6fdbd8SKent Overstreet 24285f786787SKent Overstreet dst = bch2_trans_copy_iter(&trans, src); 24295f786787SKent Overstreet BUG_ON(IS_ERR_OR_NULL(dst)); 24305f786787SKent Overstreet 243163095894SKent Overstreet while (1) { 243263095894SKent Overstreet struct disk_reservation disk_res = 243363095894SKent Overstreet bch2_disk_reservation_init(c, 0); 243463095894SKent Overstreet BKEY_PADDED(k) copy; 243563095894SKent Overstreet struct bkey_i delete; 243663095894SKent Overstreet struct bkey_s_c k; 243763095894SKent Overstreet struct bpos next_pos; 24385f786787SKent Overstreet struct bpos move_pos = POS(inode->v.i_ino, offset >> 9); 24395f786787SKent Overstreet struct bpos atomic_end; 244063095894SKent Overstreet unsigned commit_flags = BTREE_INSERT_NOFAIL| 244163095894SKent Overstreet BTREE_INSERT_ATOMIC| 244263095894SKent Overstreet BTREE_INSERT_USE_RESERVE; 244363095894SKent Overstreet 24445f786787SKent Overstreet k = insert 24455f786787SKent Overstreet ? bch2_btree_iter_peek_prev(src) 24465f786787SKent Overstreet : bch2_btree_iter_peek(src); 244763095894SKent Overstreet if ((ret = bkey_err(k))) 244863095894SKent Overstreet goto bkey_err; 244963095894SKent Overstreet 245063095894SKent Overstreet if (!k.k || k.k->p.inode != inode->v.i_ino) 245163095894SKent Overstreet break; 245263095894SKent Overstreet 24535f786787SKent Overstreet BUG_ON(bkey_cmp(src->pos, bkey_start_pos(k.k))); 245463095894SKent Overstreet 24555f786787SKent Overstreet if (insert && 24565f786787SKent Overstreet bkey_cmp(k.k->p, POS(inode->v.i_ino, offset >> 9)) <= 0) 24575f786787SKent Overstreet break; 24585f786787SKent Overstreet reassemble: 24595f786787SKent Overstreet bkey_reassemble(©.k, k); 24605f786787SKent Overstreet 24615f786787SKent Overstreet if (insert && 24625f786787SKent Overstreet bkey_cmp(bkey_start_pos(k.k), move_pos) < 0) { 24635f786787SKent Overstreet bch2_cut_front(move_pos, ©.k); 24645f786787SKent Overstreet bch2_btree_iter_set_pos(src, bkey_start_pos(©.k.k)); 24655f786787SKent Overstreet } 24665f786787SKent Overstreet 24675f786787SKent Overstreet copy.k.k.p.offset += shift >> 9; 24685f786787SKent Overstreet bch2_btree_iter_set_pos(dst, bkey_start_pos(©.k.k)); 24691c6fdbd8SKent Overstreet 24705f786787SKent Overstreet ret = bch2_extent_atomic_end(dst, ©.k, &atomic_end); 24713c7f3b7aSKent Overstreet if (ret) 24723c7f3b7aSKent Overstreet goto bkey_err; 2473e2d9912cSKent Overstreet 24745f786787SKent Overstreet if (bkey_cmp(atomic_end, copy.k.k.p)) { 24755f786787SKent Overstreet if (insert) { 24765f786787SKent Overstreet move_pos = atomic_end; 24775f786787SKent Overstreet move_pos.offset -= shift >> 9; 24785f786787SKent Overstreet goto reassemble; 24795f786787SKent Overstreet } else { 24805f786787SKent Overstreet bch2_cut_back(atomic_end, ©.k.k); 24815f786787SKent Overstreet } 24825f786787SKent Overstreet } 24835f786787SKent Overstreet 248463095894SKent Overstreet bkey_init(&delete.k); 248563095894SKent Overstreet delete.k.p = src->pos; 248663095894SKent Overstreet bch2_key_resize(&delete.k, copy.k.k.size); 24871c6fdbd8SKent Overstreet 24885f786787SKent Overstreet next_pos = insert ? bkey_start_pos(&delete.k) : delete.k.p; 248963095894SKent Overstreet 249063095894SKent Overstreet /* 249163095894SKent Overstreet * If the new and old keys overlap (because we're moving an 249263095894SKent Overstreet * extent that's bigger than the amount we're collapsing by), 249363095894SKent Overstreet * we need to trim the delete key here so they don't overlap 249463095894SKent Overstreet * because overlaps on insertions aren't handled before 249563095894SKent Overstreet * triggers are run, so the overwrite will get double counted 249663095894SKent Overstreet * by the triggers machinery: 249763095894SKent Overstreet */ 24985f786787SKent Overstreet if (insert && 24995f786787SKent Overstreet bkey_cmp(bkey_start_pos(©.k.k), delete.k.p) < 0) { 25005f786787SKent Overstreet bch2_cut_back(bkey_start_pos(©.k.k), &delete.k); 25015f786787SKent Overstreet } else if (!insert && 25025f786787SKent Overstreet bkey_cmp(copy.k.k.p, 25035f786787SKent Overstreet bkey_start_pos(&delete.k)) > 0) { 250463095894SKent Overstreet bch2_cut_front(copy.k.k.p, &delete); 250563095894SKent Overstreet 250663095894SKent Overstreet del = bch2_trans_copy_iter(&trans, src); 250763095894SKent Overstreet BUG_ON(IS_ERR_OR_NULL(del)); 250863095894SKent Overstreet 250963095894SKent Overstreet bch2_btree_iter_set_pos(del, 251063095894SKent Overstreet bkey_start_pos(&delete.k)); 251163095894SKent Overstreet } 251263095894SKent Overstreet 2513a7199432SKent Overstreet bch2_trans_update(&trans, dst, ©.k); 2514a7199432SKent Overstreet bch2_trans_update(&trans, del ?: src, &delete); 251563095894SKent Overstreet 251663095894SKent Overstreet if (copy.k.k.size == k.k->size) { 251763095894SKent Overstreet /* 251863095894SKent Overstreet * If we're moving the entire extent, we can skip 251963095894SKent Overstreet * running triggers: 252063095894SKent Overstreet */ 252163095894SKent Overstreet commit_flags |= BTREE_INSERT_NOMARK; 252263095894SKent Overstreet } else { 252363095894SKent Overstreet /* We might end up splitting compressed extents: */ 252463095894SKent Overstreet unsigned nr_ptrs = 252563095894SKent Overstreet bch2_bkey_nr_dirty_ptrs(bkey_i_to_s_c(©.k)); 252663095894SKent Overstreet 252763095894SKent Overstreet ret = bch2_disk_reservation_get(c, &disk_res, 252863095894SKent Overstreet copy.k.k.size, nr_ptrs, 25291c6fdbd8SKent Overstreet BCH_DISK_RESERVATION_NOFAIL); 25301c6fdbd8SKent Overstreet BUG_ON(ret); 253163095894SKent Overstreet } 25321c6fdbd8SKent Overstreet 253363095894SKent Overstreet ret = bch2_trans_commit(&trans, &disk_res, 253463095894SKent Overstreet &inode->ei_journal_seq, 253563095894SKent Overstreet commit_flags); 25361c6fdbd8SKent Overstreet bch2_disk_reservation_put(c, &disk_res); 25370f238367SKent Overstreet bkey_err: 253863095894SKent Overstreet if (del) 253964bc0011SKent Overstreet bch2_trans_iter_put(&trans, del); 254063095894SKent Overstreet del = NULL; 254163095894SKent Overstreet 254263095894SKent Overstreet if (!ret) 254363095894SKent Overstreet bch2_btree_iter_set_pos(src, next_pos); 254463095894SKent Overstreet 25451c6fdbd8SKent Overstreet if (ret == -EINTR) 25461c6fdbd8SKent Overstreet ret = 0; 25478ef231bdSKent Overstreet if (ret) 25488ef231bdSKent Overstreet goto err; 25491c6fdbd8SKent Overstreet 2550424eb881SKent Overstreet bch2_trans_cond_resched(&trans); 25511c6fdbd8SKent Overstreet } 25528ef231bdSKent Overstreet bch2_trans_unlock(&trans); 25531c6fdbd8SKent Overstreet 25545f786787SKent Overstreet if (!insert) { 25558ef231bdSKent Overstreet i_size_write(&inode->v, new_size); 25568ef231bdSKent Overstreet mutex_lock(&inode->ei_update_lock); 25578ef231bdSKent Overstreet ret = bch2_write_inode_size(c, inode, new_size, 25588ef231bdSKent Overstreet ATTR_MTIME|ATTR_CTIME); 25598ef231bdSKent Overstreet mutex_unlock(&inode->ei_update_lock); 25605f786787SKent Overstreet } 25611c6fdbd8SKent Overstreet err: 25628ef231bdSKent Overstreet bch2_trans_exit(&trans); 25631c6fdbd8SKent Overstreet bch2_pagecache_block_put(&inode->ei_pagecache_lock); 25641c6fdbd8SKent Overstreet inode_unlock(&inode->v); 25651c6fdbd8SKent Overstreet return ret; 25661c6fdbd8SKent Overstreet } 25671c6fdbd8SKent Overstreet 25682e87eae1SKent Overstreet static long bchfs_fallocate(struct bch_inode_info *inode, int mode, 25691c6fdbd8SKent Overstreet loff_t offset, loff_t len) 25701c6fdbd8SKent Overstreet { 25711c6fdbd8SKent Overstreet struct address_space *mapping = inode->v.i_mapping; 25721c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 2573190fa7afSKent Overstreet struct btree_trans trans; 2574190fa7afSKent Overstreet struct btree_iter *iter; 25751c6fdbd8SKent Overstreet struct bpos end_pos; 25761c6fdbd8SKent Overstreet loff_t end = offset + len; 2577a99b1cafSKent Overstreet loff_t block_start = round_down(offset, block_bytes(c)); 2578a99b1cafSKent Overstreet loff_t block_end = round_up(end, block_bytes(c)); 25791c6fdbd8SKent Overstreet unsigned sectors; 25809a3df993SKent Overstreet unsigned replicas = io_opts(c, &inode->ei_inode).data_replicas; 25811c6fdbd8SKent Overstreet int ret; 25821c6fdbd8SKent Overstreet 258320bceecbSKent Overstreet bch2_trans_init(&trans, c, BTREE_ITER_MAX, 0); 25841c6fdbd8SKent Overstreet 25851c6fdbd8SKent Overstreet inode_lock(&inode->v); 25861c6fdbd8SKent Overstreet inode_dio_wait(&inode->v); 25871c6fdbd8SKent Overstreet bch2_pagecache_block_get(&inode->ei_pagecache_lock); 25881c6fdbd8SKent Overstreet 25891c6fdbd8SKent Overstreet if (!(mode & FALLOC_FL_KEEP_SIZE) && end > inode->v.i_size) { 25901c6fdbd8SKent Overstreet ret = inode_newsize_ok(&inode->v, end); 25911c6fdbd8SKent Overstreet if (ret) 25921c6fdbd8SKent Overstreet goto err; 25931c6fdbd8SKent Overstreet } 25941c6fdbd8SKent Overstreet 25951c6fdbd8SKent Overstreet if (mode & FALLOC_FL_ZERO_RANGE) { 25961c6fdbd8SKent Overstreet ret = __bch2_truncate_page(inode, 25971c6fdbd8SKent Overstreet offset >> PAGE_SHIFT, 25981c6fdbd8SKent Overstreet offset, end); 25991c6fdbd8SKent Overstreet 26001c6fdbd8SKent Overstreet if (!ret && 26011c6fdbd8SKent Overstreet offset >> PAGE_SHIFT != end >> PAGE_SHIFT) 26021c6fdbd8SKent Overstreet ret = __bch2_truncate_page(inode, 26031c6fdbd8SKent Overstreet end >> PAGE_SHIFT, 26041c6fdbd8SKent Overstreet offset, end); 26051c6fdbd8SKent Overstreet 26061c6fdbd8SKent Overstreet if (unlikely(ret)) 26071c6fdbd8SKent Overstreet goto err; 26081c6fdbd8SKent Overstreet 26091c6fdbd8SKent Overstreet truncate_pagecache_range(&inode->v, offset, end - 1); 26101c6fdbd8SKent Overstreet } 26111c6fdbd8SKent Overstreet 2612190fa7afSKent Overstreet iter = bch2_trans_get_iter(&trans, BTREE_ID_EXTENTS, 2613190fa7afSKent Overstreet POS(inode->v.i_ino, block_start >> 9), 2614190fa7afSKent Overstreet BTREE_ITER_SLOTS|BTREE_ITER_INTENT); 26151c6fdbd8SKent Overstreet end_pos = POS(inode->v.i_ino, block_end >> 9); 26161c6fdbd8SKent Overstreet 2617190fa7afSKent Overstreet while (bkey_cmp(iter->pos, end_pos) < 0) { 26182e87eae1SKent Overstreet s64 i_sectors_delta = 0; 26191c6fdbd8SKent Overstreet struct disk_reservation disk_res = { 0 }; 2620190fa7afSKent Overstreet struct quota_res quota_res = { 0 }; 26211c6fdbd8SKent Overstreet struct bkey_i_reservation reservation; 26221c6fdbd8SKent Overstreet struct bkey_s_c k; 26231c6fdbd8SKent Overstreet 2624190fa7afSKent Overstreet k = bch2_btree_iter_peek_slot(iter); 26250f238367SKent Overstreet if ((ret = bkey_err(k))) 26260f238367SKent Overstreet goto bkey_err; 26271c6fdbd8SKent Overstreet 26281c6fdbd8SKent Overstreet /* already reserved */ 262926609b61SKent Overstreet if (k.k->type == KEY_TYPE_reservation && 26301c6fdbd8SKent Overstreet bkey_s_c_to_reservation(k).v->nr_replicas >= replicas) { 2631190fa7afSKent Overstreet bch2_btree_iter_next_slot(iter); 26321c6fdbd8SKent Overstreet continue; 26331c6fdbd8SKent Overstreet } 26341c6fdbd8SKent Overstreet 2635190fa7afSKent Overstreet if (bkey_extent_is_data(k.k) && 2636190fa7afSKent Overstreet !(mode & FALLOC_FL_ZERO_RANGE)) { 2637190fa7afSKent Overstreet bch2_btree_iter_next_slot(iter); 26381c6fdbd8SKent Overstreet continue; 26391c6fdbd8SKent Overstreet } 26401c6fdbd8SKent Overstreet 26411c6fdbd8SKent Overstreet bkey_reservation_init(&reservation.k_i); 264226609b61SKent Overstreet reservation.k.type = KEY_TYPE_reservation; 26431c6fdbd8SKent Overstreet reservation.k.p = k.k->p; 26441c6fdbd8SKent Overstreet reservation.k.size = k.k->size; 26451c6fdbd8SKent Overstreet 2646190fa7afSKent Overstreet bch2_cut_front(iter->pos, &reservation.k_i); 26471c6fdbd8SKent Overstreet bch2_cut_back(end_pos, &reservation.k); 26481c6fdbd8SKent Overstreet 26491c6fdbd8SKent Overstreet sectors = reservation.k.size; 265026609b61SKent Overstreet reservation.v.nr_replicas = bch2_bkey_nr_dirty_ptrs(k); 26511c6fdbd8SKent Overstreet 26521c6fdbd8SKent Overstreet if (!bkey_extent_is_allocation(k.k)) { 26531c6fdbd8SKent Overstreet ret = bch2_quota_reservation_add(c, inode, 2654190fa7afSKent Overstreet "a_res, 26551c6fdbd8SKent Overstreet sectors, true); 26561c6fdbd8SKent Overstreet if (unlikely(ret)) 26570f238367SKent Overstreet goto bkey_err; 26581c6fdbd8SKent Overstreet } 26591c6fdbd8SKent Overstreet 26601c6fdbd8SKent Overstreet if (reservation.v.nr_replicas < replicas || 26611c6fdbd8SKent Overstreet bch2_extent_is_compressed(k)) { 26621c6fdbd8SKent Overstreet ret = bch2_disk_reservation_get(c, &disk_res, sectors, 26631c6fdbd8SKent Overstreet replicas, 0); 26641c6fdbd8SKent Overstreet if (unlikely(ret)) 26650f238367SKent Overstreet goto bkey_err; 26661c6fdbd8SKent Overstreet 26671c6fdbd8SKent Overstreet reservation.v.nr_replicas = disk_res.nr_replicas; 26681c6fdbd8SKent Overstreet } 26691c6fdbd8SKent Overstreet 2670b17657d0SKent Overstreet bch2_trans_begin_updates(&trans); 2671b17657d0SKent Overstreet 26722e87eae1SKent Overstreet ret = bch2_extent_update(&trans, iter, &reservation.k_i, 26732e87eae1SKent Overstreet &disk_res, &inode->ei_journal_seq, 26742e87eae1SKent Overstreet 0, &i_sectors_delta); 26752e87eae1SKent Overstreet i_sectors_acct(c, inode, "a_res, i_sectors_delta); 26760f238367SKent Overstreet bkey_err: 2677190fa7afSKent Overstreet bch2_quota_reservation_put(c, inode, "a_res); 26781c6fdbd8SKent Overstreet bch2_disk_reservation_put(c, &disk_res); 26791c6fdbd8SKent Overstreet if (ret == -EINTR) 26801c6fdbd8SKent Overstreet ret = 0; 2681190fa7afSKent Overstreet if (ret) 2682190fa7afSKent Overstreet goto err; 26831c6fdbd8SKent Overstreet } 2684e0541a93SKent Overstreet 2685e0541a93SKent Overstreet /* 2686e0541a93SKent Overstreet * Do we need to extend the file? 2687e0541a93SKent Overstreet * 2688e0541a93SKent Overstreet * If we zeroed up to the end of the file, we dropped whatever writes 2689e0541a93SKent Overstreet * were going to write out the current i_size, so we have to extend 2690e0541a93SKent Overstreet * manually even if FL_KEEP_SIZE was set: 2691e0541a93SKent Overstreet */ 2692e0541a93SKent Overstreet if (end >= inode->v.i_size && 2693e0541a93SKent Overstreet (!(mode & FALLOC_FL_KEEP_SIZE) || 2694e0541a93SKent Overstreet (mode & FALLOC_FL_ZERO_RANGE))) { 2695e0541a93SKent Overstreet struct btree_iter *inode_iter; 2696e0541a93SKent Overstreet struct bch_inode_unpacked inode_u; 2697e0541a93SKent Overstreet 2698e0541a93SKent Overstreet do { 2699e0541a93SKent Overstreet bch2_trans_begin(&trans); 2700e0541a93SKent Overstreet inode_iter = bch2_inode_peek(&trans, &inode_u, 2701e0541a93SKent Overstreet inode->v.i_ino, 0); 2702e0541a93SKent Overstreet ret = PTR_ERR_OR_ZERO(inode_iter); 2703e0541a93SKent Overstreet } while (ret == -EINTR); 2704e0541a93SKent Overstreet 2705190fa7afSKent Overstreet bch2_trans_unlock(&trans); 27061c6fdbd8SKent Overstreet 27071c6fdbd8SKent Overstreet if (ret) 27081c6fdbd8SKent Overstreet goto err; 27091c6fdbd8SKent Overstreet 2710e0541a93SKent Overstreet /* 2711e0541a93SKent Overstreet * Sync existing appends before extending i_size, 2712e0541a93SKent Overstreet * as in bch2_extend(): 2713e0541a93SKent Overstreet */ 2714e0541a93SKent Overstreet ret = filemap_write_and_wait_range(mapping, 2715e0541a93SKent Overstreet inode_u.bi_size, S64_MAX); 2716e0541a93SKent Overstreet if (ret) 2717e0541a93SKent Overstreet goto err; 2718e0541a93SKent Overstreet 2719e0541a93SKent Overstreet if (mode & FALLOC_FL_KEEP_SIZE) 2720e0541a93SKent Overstreet end = inode->v.i_size; 2721e0541a93SKent Overstreet else 2722e0541a93SKent Overstreet i_size_write(&inode->v, end); 2723e0541a93SKent Overstreet 27241c6fdbd8SKent Overstreet mutex_lock(&inode->ei_update_lock); 2725e0541a93SKent Overstreet ret = bch2_write_inode_size(c, inode, end, 0); 27261c6fdbd8SKent Overstreet mutex_unlock(&inode->ei_update_lock); 27271c6fdbd8SKent Overstreet } 27281c6fdbd8SKent Overstreet err: 2729190fa7afSKent Overstreet bch2_trans_exit(&trans); 27301c6fdbd8SKent Overstreet bch2_pagecache_block_put(&inode->ei_pagecache_lock); 27311c6fdbd8SKent Overstreet inode_unlock(&inode->v); 27321c6fdbd8SKent Overstreet return ret; 27331c6fdbd8SKent Overstreet } 27341c6fdbd8SKent Overstreet 27351c6fdbd8SKent Overstreet long bch2_fallocate_dispatch(struct file *file, int mode, 27361c6fdbd8SKent Overstreet loff_t offset, loff_t len) 27371c6fdbd8SKent Overstreet { 27381c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 27392a9101a9SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 27402a9101a9SKent Overstreet long ret; 27412a9101a9SKent Overstreet 27422a9101a9SKent Overstreet if (!percpu_ref_tryget(&c->writes)) 27432a9101a9SKent Overstreet return -EROFS; 27441c6fdbd8SKent Overstreet 27451c6fdbd8SKent Overstreet if (!(mode & ~(FALLOC_FL_KEEP_SIZE|FALLOC_FL_ZERO_RANGE))) 27462a9101a9SKent Overstreet ret = bchfs_fallocate(inode, mode, offset, len); 27472a9101a9SKent Overstreet else if (mode == (FALLOC_FL_PUNCH_HOLE|FALLOC_FL_KEEP_SIZE)) 27482a9101a9SKent Overstreet ret = bchfs_fpunch(inode, offset, len); 27492a9101a9SKent Overstreet else if (mode == FALLOC_FL_INSERT_RANGE) 27502a9101a9SKent Overstreet ret = bchfs_fcollapse_finsert(inode, offset, len, true); 27512a9101a9SKent Overstreet else if (mode == FALLOC_FL_COLLAPSE_RANGE) 27522a9101a9SKent Overstreet ret = bchfs_fcollapse_finsert(inode, offset, len, false); 27532a9101a9SKent Overstreet else 27542a9101a9SKent Overstreet ret = -EOPNOTSUPP; 27551c6fdbd8SKent Overstreet 27562a9101a9SKent Overstreet percpu_ref_put(&c->writes); 27571c6fdbd8SKent Overstreet 27582a9101a9SKent Overstreet return ret; 27591c6fdbd8SKent Overstreet } 27601c6fdbd8SKent Overstreet 276176426098SKent Overstreet static void mark_range_unallocated(struct bch_inode_info *inode, 276276426098SKent Overstreet loff_t start, loff_t end) 276376426098SKent Overstreet { 276476426098SKent Overstreet pgoff_t index = start >> PAGE_SHIFT; 276576426098SKent Overstreet pgoff_t end_index = (end - 1) >> PAGE_SHIFT; 276676426098SKent Overstreet struct folio_batch fbatch; 276776426098SKent Overstreet unsigned i, j; 276876426098SKent Overstreet 276976426098SKent Overstreet folio_batch_init(&fbatch); 277076426098SKent Overstreet 277176426098SKent Overstreet while (filemap_get_folios(inode->v.i_mapping, 277276426098SKent Overstreet &index, end_index, &fbatch)) { 277376426098SKent Overstreet for (i = 0; i < folio_batch_count(&fbatch); i++) { 277476426098SKent Overstreet struct folio *folio = fbatch.folios[i]; 277576426098SKent Overstreet struct bch_page_state *s; 277676426098SKent Overstreet 277776426098SKent Overstreet folio_lock(folio); 277876426098SKent Overstreet s = bch2_page_state(&folio->page); 277976426098SKent Overstreet 27803826ee0bSKent Overstreet if (s) { 27813826ee0bSKent Overstreet spin_lock(&s->lock); 278276426098SKent Overstreet for (j = 0; j < PAGE_SECTORS; j++) 278376426098SKent Overstreet s->s[j].nr_replicas = 0; 27843826ee0bSKent Overstreet spin_unlock(&s->lock); 27853826ee0bSKent Overstreet } 278676426098SKent Overstreet 278776426098SKent Overstreet folio_unlock(folio); 278876426098SKent Overstreet } 278976426098SKent Overstreet folio_batch_release(&fbatch); 279076426098SKent Overstreet cond_resched(); 279176426098SKent Overstreet } 279276426098SKent Overstreet } 279376426098SKent Overstreet 279476426098SKent Overstreet loff_t bch2_remap_file_range(struct file *file_src, loff_t pos_src, 279576426098SKent Overstreet struct file *file_dst, loff_t pos_dst, 279676426098SKent Overstreet loff_t len, unsigned remap_flags) 279776426098SKent Overstreet { 279876426098SKent Overstreet struct bch_inode_info *src = file_bch_inode(file_src); 279976426098SKent Overstreet struct bch_inode_info *dst = file_bch_inode(file_dst); 280076426098SKent Overstreet struct bch_fs *c = src->v.i_sb->s_fs_info; 28012e87eae1SKent Overstreet s64 i_sectors_delta = 0; 2802*677fc056SKent Overstreet u64 aligned_len; 280376426098SKent Overstreet loff_t ret = 0; 280476426098SKent Overstreet 280576426098SKent Overstreet if (remap_flags & ~(REMAP_FILE_DEDUP|REMAP_FILE_ADVISORY)) 280676426098SKent Overstreet return -EINVAL; 280776426098SKent Overstreet 280876426098SKent Overstreet if (remap_flags & REMAP_FILE_DEDUP) 280976426098SKent Overstreet return -EOPNOTSUPP; 281076426098SKent Overstreet 281176426098SKent Overstreet if ((pos_src & (block_bytes(c) - 1)) || 281276426098SKent Overstreet (pos_dst & (block_bytes(c) - 1))) 281376426098SKent Overstreet return -EINVAL; 281476426098SKent Overstreet 281576426098SKent Overstreet if (src == dst && 281676426098SKent Overstreet abs(pos_src - pos_dst) < len) 281776426098SKent Overstreet return -EINVAL; 281876426098SKent Overstreet 281976426098SKent Overstreet bch2_lock_inodes(INODE_LOCK|INODE_PAGECACHE_BLOCK, src, dst); 282076426098SKent Overstreet 28212e87eae1SKent Overstreet file_update_time(file_dst); 28222e87eae1SKent Overstreet 282376426098SKent Overstreet inode_dio_wait(&src->v); 282476426098SKent Overstreet inode_dio_wait(&dst->v); 282576426098SKent Overstreet 282676426098SKent Overstreet ret = generic_remap_file_range_prep(file_src, pos_src, 282776426098SKent Overstreet file_dst, pos_dst, 282876426098SKent Overstreet &len, remap_flags); 282976426098SKent Overstreet if (ret < 0 || len == 0) 28302e87eae1SKent Overstreet goto err; 283176426098SKent Overstreet 2832*677fc056SKent Overstreet aligned_len = round_up((u64) len, block_bytes(c)); 283376426098SKent Overstreet 283476426098SKent Overstreet ret = write_invalidate_inode_pages_range(dst->v.i_mapping, 2835*677fc056SKent Overstreet pos_dst, pos_dst + len - 1); 283676426098SKent Overstreet if (ret) 28372e87eae1SKent Overstreet goto err; 283876426098SKent Overstreet 283976426098SKent Overstreet mark_range_unallocated(src, pos_src, pos_src + aligned_len); 284076426098SKent Overstreet 28412e87eae1SKent Overstreet ret = bch2_remap_range(c, 284276426098SKent Overstreet POS(dst->v.i_ino, pos_dst >> 9), 284376426098SKent Overstreet POS(src->v.i_ino, pos_src >> 9), 284476426098SKent Overstreet aligned_len >> 9, 28452e87eae1SKent Overstreet &dst->ei_journal_seq, 28462e87eae1SKent Overstreet pos_dst + len, &i_sectors_delta); 28472e87eae1SKent Overstreet if (ret < 0) 28482e87eae1SKent Overstreet goto err; 284976426098SKent Overstreet 28502e87eae1SKent Overstreet /* 28512e87eae1SKent Overstreet * due to alignment, we might have remapped slightly more than requsted 28522e87eae1SKent Overstreet */ 2853*677fc056SKent Overstreet ret = min((u64) ret << 9, (u64) len); 28542e87eae1SKent Overstreet 28552e87eae1SKent Overstreet /* XXX get a quota reservation */ 28562e87eae1SKent Overstreet i_sectors_acct(c, dst, NULL, i_sectors_delta); 28572e87eae1SKent Overstreet 28582e87eae1SKent Overstreet spin_lock(&dst->v.i_lock); 2859*677fc056SKent Overstreet if (pos_dst + ret > dst->v.i_size) 2860*677fc056SKent Overstreet i_size_write(&dst->v, pos_dst + ret); 28612e87eae1SKent Overstreet spin_unlock(&dst->v.i_lock); 28622e87eae1SKent Overstreet err: 286376426098SKent Overstreet bch2_unlock_inodes(INODE_LOCK|INODE_PAGECACHE_BLOCK, src, dst); 286476426098SKent Overstreet 286576426098SKent Overstreet return ret; 286676426098SKent Overstreet } 286776426098SKent Overstreet 28681c6fdbd8SKent Overstreet /* fseek: */ 28691c6fdbd8SKent Overstreet 2870543ef2ebSKent Overstreet static int folio_data_offset(struct folio *folio, unsigned offset) 28711c6fdbd8SKent Overstreet { 2872f57a6a5dSKent Overstreet struct bch_page_state *s = bch2_page_state(&folio->page); 2873f57a6a5dSKent Overstreet unsigned i; 2874f81b648dSKent Overstreet 2875543ef2ebSKent Overstreet if (s) 2876543ef2ebSKent Overstreet for (i = offset >> 9; i < PAGE_SECTORS; i++) 2877f57a6a5dSKent Overstreet if (s->s[i].state >= SECTOR_DIRTY) 2878543ef2ebSKent Overstreet return i << 9; 2879f57a6a5dSKent Overstreet 2880543ef2ebSKent Overstreet return -1; 28811c6fdbd8SKent Overstreet } 28821c6fdbd8SKent Overstreet 2883543ef2ebSKent Overstreet static loff_t bch2_seek_pagecache_data(struct inode *vinode, 28841c6fdbd8SKent Overstreet loff_t start_offset, 28851c6fdbd8SKent Overstreet loff_t end_offset) 28861c6fdbd8SKent Overstreet { 28871c6fdbd8SKent Overstreet struct folio_batch fbatch; 28881c6fdbd8SKent Overstreet pgoff_t start_index = start_offset >> PAGE_SHIFT; 28891c6fdbd8SKent Overstreet pgoff_t end_index = end_offset >> PAGE_SHIFT; 28901c6fdbd8SKent Overstreet pgoff_t index = start_index; 28911c6fdbd8SKent Overstreet unsigned i; 2892543ef2ebSKent Overstreet loff_t ret; 2893543ef2ebSKent Overstreet int offset; 28941c6fdbd8SKent Overstreet 28951c6fdbd8SKent Overstreet folio_batch_init(&fbatch); 28961c6fdbd8SKent Overstreet 28971c6fdbd8SKent Overstreet while (filemap_get_folios(vinode->i_mapping, 28981c6fdbd8SKent Overstreet &index, end_index, &fbatch)) { 28991c6fdbd8SKent Overstreet for (i = 0; i < folio_batch_count(&fbatch); i++) { 29001c6fdbd8SKent Overstreet struct folio *folio = fbatch.folios[i]; 29011c6fdbd8SKent Overstreet 29021c6fdbd8SKent Overstreet folio_lock(folio); 2903543ef2ebSKent Overstreet offset = folio_data_offset(folio, 2904543ef2ebSKent Overstreet folio->index == start_index 2905543ef2ebSKent Overstreet ? start_offset & (PAGE_SIZE - 1) 2906543ef2ebSKent Overstreet : 0); 2907543ef2ebSKent Overstreet if (offset >= 0) { 2908543ef2ebSKent Overstreet ret = clamp(((loff_t) folio->index << PAGE_SHIFT) + 2909543ef2ebSKent Overstreet offset, 2910543ef2ebSKent Overstreet start_offset, end_offset); 29111c6fdbd8SKent Overstreet folio_unlock(folio); 29121c6fdbd8SKent Overstreet folio_batch_release(&fbatch); 2913543ef2ebSKent Overstreet return ret; 29141c6fdbd8SKent Overstreet } 29151c6fdbd8SKent Overstreet folio_unlock(folio); 29161c6fdbd8SKent Overstreet } 29171c6fdbd8SKent Overstreet folio_batch_release(&fbatch); 29181c6fdbd8SKent Overstreet cond_resched(); 29191c6fdbd8SKent Overstreet } 29201c6fdbd8SKent Overstreet 29211c6fdbd8SKent Overstreet return end_offset; 29221c6fdbd8SKent Overstreet } 29231c6fdbd8SKent Overstreet 29241c6fdbd8SKent Overstreet static loff_t bch2_seek_data(struct file *file, u64 offset) 29251c6fdbd8SKent Overstreet { 29261c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 29271c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 2928424eb881SKent Overstreet struct btree_trans trans; 2929424eb881SKent Overstreet struct btree_iter *iter; 29301c6fdbd8SKent Overstreet struct bkey_s_c k; 29311c6fdbd8SKent Overstreet u64 isize, next_data = MAX_LFS_FILESIZE; 29321c6fdbd8SKent Overstreet int ret; 29331c6fdbd8SKent Overstreet 29341c6fdbd8SKent Overstreet isize = i_size_read(&inode->v); 29351c6fdbd8SKent Overstreet if (offset >= isize) 29361c6fdbd8SKent Overstreet return -ENXIO; 29371c6fdbd8SKent Overstreet 293820bceecbSKent Overstreet bch2_trans_init(&trans, c, 0, 0); 2939424eb881SKent Overstreet 2940424eb881SKent Overstreet for_each_btree_key(&trans, iter, BTREE_ID_EXTENTS, 294194f651e2SKent Overstreet POS(inode->v.i_ino, offset >> 9), 0, k, ret) { 29421c6fdbd8SKent Overstreet if (k.k->p.inode != inode->v.i_ino) { 29431c6fdbd8SKent Overstreet break; 29441c6fdbd8SKent Overstreet } else if (bkey_extent_is_data(k.k)) { 29451c6fdbd8SKent Overstreet next_data = max(offset, bkey_start_offset(k.k) << 9); 29461c6fdbd8SKent Overstreet break; 29471c6fdbd8SKent Overstreet } else if (k.k->p.offset >> 9 > isize) 29481c6fdbd8SKent Overstreet break; 29491c6fdbd8SKent Overstreet } 29501c6fdbd8SKent Overstreet 295194f651e2SKent Overstreet ret = bch2_trans_exit(&trans) ?: ret; 29521c6fdbd8SKent Overstreet if (ret) 29531c6fdbd8SKent Overstreet return ret; 29541c6fdbd8SKent Overstreet 29551c6fdbd8SKent Overstreet if (next_data > offset) 2956543ef2ebSKent Overstreet next_data = bch2_seek_pagecache_data(&inode->v, 29571c6fdbd8SKent Overstreet offset, next_data); 29581c6fdbd8SKent Overstreet 2959e10d3094SKent Overstreet if (next_data >= isize) 29601c6fdbd8SKent Overstreet return -ENXIO; 29611c6fdbd8SKent Overstreet 29621c6fdbd8SKent Overstreet return vfs_setpos(file, next_data, MAX_LFS_FILESIZE); 29631c6fdbd8SKent Overstreet } 29641c6fdbd8SKent Overstreet 2965543ef2ebSKent Overstreet static int __page_hole_offset(struct page *page, unsigned offset) 29661c6fdbd8SKent Overstreet { 2967543ef2ebSKent Overstreet struct bch_page_state *s = bch2_page_state(page); 2968543ef2ebSKent Overstreet unsigned i; 2969543ef2ebSKent Overstreet 2970543ef2ebSKent Overstreet if (!s) 2971543ef2ebSKent Overstreet return 0; 2972543ef2ebSKent Overstreet 2973543ef2ebSKent Overstreet for (i = offset >> 9; i < PAGE_SECTORS; i++) 2974543ef2ebSKent Overstreet if (s->s[i].state < SECTOR_DIRTY) 2975543ef2ebSKent Overstreet return i << 9; 2976543ef2ebSKent Overstreet 2977543ef2ebSKent Overstreet return -1; 2978543ef2ebSKent Overstreet } 2979543ef2ebSKent Overstreet 2980543ef2ebSKent Overstreet static loff_t page_hole_offset(struct address_space *mapping, loff_t offset) 2981543ef2ebSKent Overstreet { 2982543ef2ebSKent Overstreet pgoff_t index = offset >> PAGE_SHIFT; 29831c6fdbd8SKent Overstreet struct page *page; 2984543ef2ebSKent Overstreet int pg_offset; 2985543ef2ebSKent Overstreet loff_t ret = -1; 29861c6fdbd8SKent Overstreet 29871c6fdbd8SKent Overstreet page = find_lock_page(mapping, index); 29881c6fdbd8SKent Overstreet if (!page) 2989543ef2ebSKent Overstreet return offset; 29901c6fdbd8SKent Overstreet 2991543ef2ebSKent Overstreet pg_offset = __page_hole_offset(page, offset & (PAGE_SIZE - 1)); 2992543ef2ebSKent Overstreet if (pg_offset >= 0) 2993543ef2ebSKent Overstreet ret = ((loff_t) index << PAGE_SHIFT) + pg_offset; 2994543ef2ebSKent Overstreet 29951c6fdbd8SKent Overstreet unlock_page(page); 29961c6fdbd8SKent Overstreet 29971c6fdbd8SKent Overstreet return ret; 29981c6fdbd8SKent Overstreet } 29991c6fdbd8SKent Overstreet 3000543ef2ebSKent Overstreet static loff_t bch2_seek_pagecache_hole(struct inode *vinode, 30011c6fdbd8SKent Overstreet loff_t start_offset, 30021c6fdbd8SKent Overstreet loff_t end_offset) 30031c6fdbd8SKent Overstreet { 30041c6fdbd8SKent Overstreet struct address_space *mapping = vinode->i_mapping; 3005543ef2ebSKent Overstreet loff_t offset = start_offset, hole; 30061c6fdbd8SKent Overstreet 3007543ef2ebSKent Overstreet while (offset < end_offset) { 3008543ef2ebSKent Overstreet hole = page_hole_offset(mapping, offset); 3009543ef2ebSKent Overstreet if (hole >= 0 && hole <= end_offset) 3010543ef2ebSKent Overstreet return max(start_offset, hole); 3011543ef2ebSKent Overstreet 3012543ef2ebSKent Overstreet offset += PAGE_SIZE; 3013543ef2ebSKent Overstreet offset &= PAGE_MASK; 3014543ef2ebSKent Overstreet } 30151c6fdbd8SKent Overstreet 30161c6fdbd8SKent Overstreet return end_offset; 30171c6fdbd8SKent Overstreet } 30181c6fdbd8SKent Overstreet 30191c6fdbd8SKent Overstreet static loff_t bch2_seek_hole(struct file *file, u64 offset) 30201c6fdbd8SKent Overstreet { 30211c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 30221c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 3023424eb881SKent Overstreet struct btree_trans trans; 3024424eb881SKent Overstreet struct btree_iter *iter; 30251c6fdbd8SKent Overstreet struct bkey_s_c k; 30261c6fdbd8SKent Overstreet u64 isize, next_hole = MAX_LFS_FILESIZE; 30271c6fdbd8SKent Overstreet int ret; 30281c6fdbd8SKent Overstreet 30291c6fdbd8SKent Overstreet isize = i_size_read(&inode->v); 30301c6fdbd8SKent Overstreet if (offset >= isize) 30311c6fdbd8SKent Overstreet return -ENXIO; 30321c6fdbd8SKent Overstreet 303320bceecbSKent Overstreet bch2_trans_init(&trans, c, 0, 0); 3034424eb881SKent Overstreet 3035424eb881SKent Overstreet for_each_btree_key(&trans, iter, BTREE_ID_EXTENTS, 30361c6fdbd8SKent Overstreet POS(inode->v.i_ino, offset >> 9), 303794f651e2SKent Overstreet BTREE_ITER_SLOTS, k, ret) { 30381c6fdbd8SKent Overstreet if (k.k->p.inode != inode->v.i_ino) { 3039543ef2ebSKent Overstreet next_hole = bch2_seek_pagecache_hole(&inode->v, 30401c6fdbd8SKent Overstreet offset, MAX_LFS_FILESIZE); 30411c6fdbd8SKent Overstreet break; 30421c6fdbd8SKent Overstreet } else if (!bkey_extent_is_data(k.k)) { 3043543ef2ebSKent Overstreet next_hole = bch2_seek_pagecache_hole(&inode->v, 30441c6fdbd8SKent Overstreet max(offset, bkey_start_offset(k.k) << 9), 30451c6fdbd8SKent Overstreet k.k->p.offset << 9); 30461c6fdbd8SKent Overstreet 30471c6fdbd8SKent Overstreet if (next_hole < k.k->p.offset << 9) 30481c6fdbd8SKent Overstreet break; 30491c6fdbd8SKent Overstreet } else { 30501c6fdbd8SKent Overstreet offset = max(offset, bkey_start_offset(k.k) << 9); 30511c6fdbd8SKent Overstreet } 30521c6fdbd8SKent Overstreet } 30531c6fdbd8SKent Overstreet 305494f651e2SKent Overstreet ret = bch2_trans_exit(&trans) ?: ret; 30551c6fdbd8SKent Overstreet if (ret) 30561c6fdbd8SKent Overstreet return ret; 30571c6fdbd8SKent Overstreet 30581c6fdbd8SKent Overstreet if (next_hole > isize) 30591c6fdbd8SKent Overstreet next_hole = isize; 30601c6fdbd8SKent Overstreet 30611c6fdbd8SKent Overstreet return vfs_setpos(file, next_hole, MAX_LFS_FILESIZE); 30621c6fdbd8SKent Overstreet } 30631c6fdbd8SKent Overstreet 30641c6fdbd8SKent Overstreet loff_t bch2_llseek(struct file *file, loff_t offset, int whence) 30651c6fdbd8SKent Overstreet { 30661c6fdbd8SKent Overstreet switch (whence) { 30671c6fdbd8SKent Overstreet case SEEK_SET: 30681c6fdbd8SKent Overstreet case SEEK_CUR: 30691c6fdbd8SKent Overstreet case SEEK_END: 30701c6fdbd8SKent Overstreet return generic_file_llseek(file, offset, whence); 30711c6fdbd8SKent Overstreet case SEEK_DATA: 30721c6fdbd8SKent Overstreet return bch2_seek_data(file, offset); 30731c6fdbd8SKent Overstreet case SEEK_HOLE: 30741c6fdbd8SKent Overstreet return bch2_seek_hole(file, offset); 30751c6fdbd8SKent Overstreet } 30761c6fdbd8SKent Overstreet 30771c6fdbd8SKent Overstreet return -EINVAL; 30781c6fdbd8SKent Overstreet } 30791c6fdbd8SKent Overstreet 30801c6fdbd8SKent Overstreet void bch2_fs_fsio_exit(struct bch_fs *c) 30811c6fdbd8SKent Overstreet { 30821c6fdbd8SKent Overstreet bioset_exit(&c->dio_write_bioset); 30831c6fdbd8SKent Overstreet bioset_exit(&c->dio_read_bioset); 30841c6fdbd8SKent Overstreet bioset_exit(&c->writepage_bioset); 30851c6fdbd8SKent Overstreet } 30861c6fdbd8SKent Overstreet 30871c6fdbd8SKent Overstreet int bch2_fs_fsio_init(struct bch_fs *c) 30881c6fdbd8SKent Overstreet { 30891c6fdbd8SKent Overstreet int ret = 0; 30901c6fdbd8SKent Overstreet 30911c6fdbd8SKent Overstreet pr_verbose_init(c->opts, ""); 30921c6fdbd8SKent Overstreet 30931c6fdbd8SKent Overstreet if (bioset_init(&c->writepage_bioset, 30949a3df993SKent Overstreet 4, offsetof(struct bch_writepage_io, op.wbio.bio), 30951c6fdbd8SKent Overstreet BIOSET_NEED_BVECS) || 30961c6fdbd8SKent Overstreet bioset_init(&c->dio_read_bioset, 30971c6fdbd8SKent Overstreet 4, offsetof(struct dio_read, rbio.bio), 30981c6fdbd8SKent Overstreet BIOSET_NEED_BVECS) || 30991c6fdbd8SKent Overstreet bioset_init(&c->dio_write_bioset, 31009a3df993SKent Overstreet 4, offsetof(struct dio_write, op.wbio.bio), 31011c6fdbd8SKent Overstreet BIOSET_NEED_BVECS)) 31021c6fdbd8SKent Overstreet ret = -ENOMEM; 31031c6fdbd8SKent Overstreet 31041c6fdbd8SKent Overstreet pr_verbose_init(c->opts, "ret %i", ret); 31051c6fdbd8SKent Overstreet return ret; 31061c6fdbd8SKent Overstreet } 31071c6fdbd8SKent Overstreet 31081c6fdbd8SKent Overstreet #endif /* NO_BCACHEFS_FS */ 3109