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" 635189e09SKent Overstreet #include "bkey_on_stack.h" 71c6fdbd8SKent Overstreet #include "btree_update.h" 81c6fdbd8SKent Overstreet #include "buckets.h" 91c6fdbd8SKent Overstreet #include "clock.h" 101c6fdbd8SKent Overstreet #include "error.h" 11e2d9912cSKent Overstreet #include "extents.h" 1208c07feaSKent Overstreet #include "extent_update.h" 131c6fdbd8SKent Overstreet #include "fs.h" 141c6fdbd8SKent Overstreet #include "fs-io.h" 151c6fdbd8SKent Overstreet #include "fsck.h" 161c6fdbd8SKent Overstreet #include "inode.h" 171c6fdbd8SKent Overstreet #include "journal.h" 181c6fdbd8SKent Overstreet #include "io.h" 191c6fdbd8SKent Overstreet #include "keylist.h" 201c6fdbd8SKent Overstreet #include "quota.h" 2176426098SKent Overstreet #include "reflink.h" 221c6fdbd8SKent Overstreet #include "trace.h" 231c6fdbd8SKent Overstreet 241c6fdbd8SKent Overstreet #include <linux/aio.h> 251c6fdbd8SKent Overstreet #include <linux/backing-dev.h> 261c6fdbd8SKent Overstreet #include <linux/falloc.h> 271c6fdbd8SKent Overstreet #include <linux/migrate.h> 281c6fdbd8SKent Overstreet #include <linux/mmu_context.h> 291c6fdbd8SKent Overstreet #include <linux/pagevec.h> 301c6fdbd8SKent Overstreet #include <linux/sched/signal.h> 311c6fdbd8SKent Overstreet #include <linux/task_io_accounting_ops.h> 321c6fdbd8SKent Overstreet #include <linux/uio.h> 331c6fdbd8SKent Overstreet #include <linux/writeback.h> 341c6fdbd8SKent Overstreet 351c6fdbd8SKent Overstreet #include <trace/events/writeback.h> 361c6fdbd8SKent Overstreet 377f5e31e1SKent Overstreet static inline bool bio_full(struct bio *bio, unsigned len) 387f5e31e1SKent Overstreet { 397f5e31e1SKent Overstreet if (bio->bi_vcnt >= bio->bi_max_vecs) 407f5e31e1SKent Overstreet return true; 417f5e31e1SKent Overstreet if (bio->bi_iter.bi_size > UINT_MAX - len) 427f5e31e1SKent Overstreet return true; 437f5e31e1SKent Overstreet return false; 447f5e31e1SKent Overstreet } 457f5e31e1SKent Overstreet 461c6fdbd8SKent Overstreet struct quota_res { 471c6fdbd8SKent Overstreet u64 sectors; 481c6fdbd8SKent Overstreet }; 491c6fdbd8SKent Overstreet 509a3df993SKent Overstreet struct bch_writepage_io { 519a3df993SKent Overstreet struct closure cl; 521c6fdbd8SKent Overstreet struct bch_inode_info *inode; 531c6fdbd8SKent Overstreet 541c6fdbd8SKent Overstreet /* must be last: */ 551c6fdbd8SKent Overstreet struct bch_write_op op; 561c6fdbd8SKent Overstreet }; 571c6fdbd8SKent Overstreet 581c6fdbd8SKent Overstreet struct dio_write { 59f8f30863SKent Overstreet struct completion done; 601c6fdbd8SKent Overstreet struct kiocb *req; 61ed484030SKent Overstreet struct mm_struct *mm; 621c6fdbd8SKent Overstreet unsigned loop:1, 631c6fdbd8SKent Overstreet sync:1, 641c6fdbd8SKent Overstreet free_iov:1; 651c6fdbd8SKent Overstreet struct quota_res quota_res; 66042a1f26SKent Overstreet u64 written; 671c6fdbd8SKent Overstreet 681c6fdbd8SKent Overstreet struct iov_iter iter; 691c6fdbd8SKent Overstreet struct iovec inline_vecs[2]; 701c6fdbd8SKent Overstreet 711c6fdbd8SKent Overstreet /* must be last: */ 729a3df993SKent Overstreet struct bch_write_op op; 731c6fdbd8SKent Overstreet }; 741c6fdbd8SKent Overstreet 751c6fdbd8SKent Overstreet struct dio_read { 761c6fdbd8SKent Overstreet struct closure cl; 771c6fdbd8SKent Overstreet struct kiocb *req; 781c6fdbd8SKent Overstreet long ret; 791c6fdbd8SKent Overstreet struct bch_read_bio rbio; 801c6fdbd8SKent Overstreet }; 811c6fdbd8SKent Overstreet 821c6fdbd8SKent Overstreet /* pagecache_block must be held */ 83a023127aSKent Overstreet static noinline int write_invalidate_inode_pages_range(struct address_space *mapping, 841c6fdbd8SKent Overstreet loff_t start, loff_t end) 851c6fdbd8SKent Overstreet { 861c6fdbd8SKent Overstreet int ret; 871c6fdbd8SKent Overstreet 881c6fdbd8SKent Overstreet /* 891c6fdbd8SKent Overstreet * XXX: the way this is currently implemented, we can spin if a process 901c6fdbd8SKent Overstreet * is continually redirtying a specific page 911c6fdbd8SKent Overstreet */ 921c6fdbd8SKent Overstreet do { 931c6fdbd8SKent Overstreet if (!mapping->nrpages) 941c6fdbd8SKent Overstreet return 0; 951c6fdbd8SKent Overstreet 961c6fdbd8SKent Overstreet ret = filemap_write_and_wait_range(mapping, start, end); 971c6fdbd8SKent Overstreet if (ret) 981c6fdbd8SKent Overstreet break; 991c6fdbd8SKent Overstreet 1001c6fdbd8SKent Overstreet if (!mapping->nrpages) 1011c6fdbd8SKent Overstreet return 0; 1021c6fdbd8SKent Overstreet 1031c6fdbd8SKent Overstreet ret = invalidate_inode_pages2_range(mapping, 1041c6fdbd8SKent Overstreet start >> PAGE_SHIFT, 1051c6fdbd8SKent Overstreet end >> PAGE_SHIFT); 1061c6fdbd8SKent Overstreet } while (ret == -EBUSY); 1071c6fdbd8SKent Overstreet 1081c6fdbd8SKent Overstreet return ret; 1091c6fdbd8SKent Overstreet } 1101c6fdbd8SKent Overstreet 1111c6fdbd8SKent Overstreet /* quotas */ 1121c6fdbd8SKent Overstreet 1131c6fdbd8SKent Overstreet #ifdef CONFIG_BCACHEFS_QUOTA 1141c6fdbd8SKent Overstreet 1151c6fdbd8SKent Overstreet static void bch2_quota_reservation_put(struct bch_fs *c, 1161c6fdbd8SKent Overstreet struct bch_inode_info *inode, 1171c6fdbd8SKent Overstreet struct quota_res *res) 1181c6fdbd8SKent Overstreet { 1191c6fdbd8SKent Overstreet if (!res->sectors) 1201c6fdbd8SKent Overstreet return; 1211c6fdbd8SKent Overstreet 1221c6fdbd8SKent Overstreet mutex_lock(&inode->ei_quota_lock); 1231c6fdbd8SKent Overstreet BUG_ON(res->sectors > inode->ei_quota_reserved); 1241c6fdbd8SKent Overstreet 1251c6fdbd8SKent Overstreet bch2_quota_acct(c, inode->ei_qid, Q_SPC, 12626609b61SKent Overstreet -((s64) res->sectors), KEY_TYPE_QUOTA_PREALLOC); 1271c6fdbd8SKent Overstreet inode->ei_quota_reserved -= res->sectors; 1281c6fdbd8SKent Overstreet mutex_unlock(&inode->ei_quota_lock); 1291c6fdbd8SKent Overstreet 1301c6fdbd8SKent Overstreet res->sectors = 0; 1311c6fdbd8SKent Overstreet } 1321c6fdbd8SKent Overstreet 1331c6fdbd8SKent Overstreet static int bch2_quota_reservation_add(struct bch_fs *c, 1341c6fdbd8SKent Overstreet struct bch_inode_info *inode, 1351c6fdbd8SKent Overstreet struct quota_res *res, 1361c6fdbd8SKent Overstreet unsigned sectors, 1371c6fdbd8SKent Overstreet bool check_enospc) 1381c6fdbd8SKent Overstreet { 1391c6fdbd8SKent Overstreet int ret; 1401c6fdbd8SKent Overstreet 1411c6fdbd8SKent Overstreet mutex_lock(&inode->ei_quota_lock); 1421c6fdbd8SKent Overstreet ret = bch2_quota_acct(c, inode->ei_qid, Q_SPC, sectors, 14326609b61SKent Overstreet check_enospc ? KEY_TYPE_QUOTA_PREALLOC : KEY_TYPE_QUOTA_NOCHECK); 1441c6fdbd8SKent Overstreet if (likely(!ret)) { 1451c6fdbd8SKent Overstreet inode->ei_quota_reserved += sectors; 1461c6fdbd8SKent Overstreet res->sectors += sectors; 1471c6fdbd8SKent Overstreet } 1481c6fdbd8SKent Overstreet mutex_unlock(&inode->ei_quota_lock); 1491c6fdbd8SKent Overstreet 1501c6fdbd8SKent Overstreet return ret; 1511c6fdbd8SKent Overstreet } 1521c6fdbd8SKent Overstreet 1531c6fdbd8SKent Overstreet #else 1541c6fdbd8SKent Overstreet 1551c6fdbd8SKent Overstreet static void bch2_quota_reservation_put(struct bch_fs *c, 1561c6fdbd8SKent Overstreet struct bch_inode_info *inode, 1571c6fdbd8SKent Overstreet struct quota_res *res) 1581c6fdbd8SKent Overstreet { 1591c6fdbd8SKent Overstreet } 1601c6fdbd8SKent Overstreet 1611c6fdbd8SKent Overstreet static int bch2_quota_reservation_add(struct bch_fs *c, 1621c6fdbd8SKent Overstreet struct bch_inode_info *inode, 1631c6fdbd8SKent Overstreet struct quota_res *res, 1641c6fdbd8SKent Overstreet unsigned sectors, 1651c6fdbd8SKent Overstreet bool check_enospc) 1661c6fdbd8SKent Overstreet { 1671c6fdbd8SKent Overstreet return 0; 1681c6fdbd8SKent Overstreet } 1691c6fdbd8SKent Overstreet 1701c6fdbd8SKent Overstreet #endif 1711c6fdbd8SKent Overstreet 1721c6fdbd8SKent Overstreet /* i_size updates: */ 1731c6fdbd8SKent Overstreet 1742ea90048SKent Overstreet struct inode_new_size { 1752ea90048SKent Overstreet loff_t new_size; 1762ea90048SKent Overstreet u64 now; 1772ea90048SKent Overstreet unsigned fields; 1782ea90048SKent Overstreet }; 1792ea90048SKent Overstreet 1801c6fdbd8SKent Overstreet static int inode_set_size(struct bch_inode_info *inode, 1811c6fdbd8SKent Overstreet struct bch_inode_unpacked *bi, 1821c6fdbd8SKent Overstreet void *p) 1831c6fdbd8SKent Overstreet { 1842ea90048SKent Overstreet struct inode_new_size *s = p; 1851c6fdbd8SKent Overstreet 1862ea90048SKent Overstreet bi->bi_size = s->new_size; 1872ea90048SKent Overstreet if (s->fields & ATTR_ATIME) 1882ea90048SKent Overstreet bi->bi_atime = s->now; 1892ea90048SKent Overstreet if (s->fields & ATTR_MTIME) 1902ea90048SKent Overstreet bi->bi_mtime = s->now; 1912ea90048SKent Overstreet if (s->fields & ATTR_CTIME) 1922ea90048SKent Overstreet bi->bi_ctime = s->now; 1931c6fdbd8SKent Overstreet 1941c6fdbd8SKent Overstreet return 0; 1951c6fdbd8SKent Overstreet } 1961c6fdbd8SKent Overstreet 19776426098SKent Overstreet int __must_check bch2_write_inode_size(struct bch_fs *c, 1981c6fdbd8SKent Overstreet struct bch_inode_info *inode, 1992ea90048SKent Overstreet loff_t new_size, unsigned fields) 2001c6fdbd8SKent Overstreet { 2012ea90048SKent Overstreet struct inode_new_size s = { 2022ea90048SKent Overstreet .new_size = new_size, 2032ea90048SKent Overstreet .now = bch2_current_time(c), 2042ea90048SKent Overstreet .fields = fields, 2052ea90048SKent Overstreet }; 2062ea90048SKent Overstreet 2072ea90048SKent Overstreet return bch2_write_inode(c, inode, inode_set_size, &s, fields); 2081c6fdbd8SKent Overstreet } 2091c6fdbd8SKent Overstreet 2101c6fdbd8SKent Overstreet static void i_sectors_acct(struct bch_fs *c, struct bch_inode_info *inode, 211190fa7afSKent Overstreet struct quota_res *quota_res, s64 sectors) 2121c6fdbd8SKent Overstreet { 213190fa7afSKent Overstreet if (!sectors) 214190fa7afSKent Overstreet return; 215190fa7afSKent Overstreet 2161c6fdbd8SKent Overstreet mutex_lock(&inode->ei_quota_lock); 2171c6fdbd8SKent Overstreet #ifdef CONFIG_BCACHEFS_QUOTA 2181c6fdbd8SKent Overstreet if (quota_res && sectors > 0) { 2191c6fdbd8SKent Overstreet BUG_ON(sectors > quota_res->sectors); 2201c6fdbd8SKent Overstreet BUG_ON(sectors > inode->ei_quota_reserved); 2211c6fdbd8SKent Overstreet 2221c6fdbd8SKent Overstreet quota_res->sectors -= sectors; 2231c6fdbd8SKent Overstreet inode->ei_quota_reserved -= sectors; 2241c6fdbd8SKent Overstreet } else { 22526609b61SKent Overstreet bch2_quota_acct(c, inode->ei_qid, Q_SPC, sectors, KEY_TYPE_QUOTA_WARN); 2261c6fdbd8SKent Overstreet } 2271c6fdbd8SKent Overstreet #endif 2281c6fdbd8SKent Overstreet inode->v.i_blocks += sectors; 2291c6fdbd8SKent Overstreet mutex_unlock(&inode->ei_quota_lock); 2301c6fdbd8SKent Overstreet } 2311c6fdbd8SKent Overstreet 2321c6fdbd8SKent Overstreet /* page state: */ 2331c6fdbd8SKent Overstreet 2341c6fdbd8SKent Overstreet /* stored in page->private: */ 2351c6fdbd8SKent Overstreet 236f57a6a5dSKent Overstreet struct bch_page_sector { 237f81b648dSKent Overstreet /* Uncompressed, fully allocated replicas: */ 238f57a6a5dSKent Overstreet unsigned nr_replicas:3; 239f81b648dSKent Overstreet 240f81b648dSKent Overstreet /* Owns PAGE_SECTORS * replicas_reserved sized reservation: */ 241f57a6a5dSKent Overstreet unsigned replicas_reserved:3; 2421c6fdbd8SKent Overstreet 243f57a6a5dSKent Overstreet /* i_sectors: */ 244f57a6a5dSKent Overstreet enum { 245f57a6a5dSKent Overstreet SECTOR_UNALLOCATED, 2462ba5d38bSKent Overstreet SECTOR_RESERVED, 247f57a6a5dSKent Overstreet SECTOR_DIRTY, 248f57a6a5dSKent Overstreet SECTOR_ALLOCATED, 249f57a6a5dSKent Overstreet } state:2; 2501c6fdbd8SKent Overstreet }; 2511c6fdbd8SKent Overstreet 252f57a6a5dSKent Overstreet struct bch_page_state { 2533826ee0bSKent Overstreet spinlock_t lock; 2547f5e31e1SKent Overstreet atomic_t write_count; 255f57a6a5dSKent Overstreet struct bch_page_sector s[PAGE_SECTORS]; 256f57a6a5dSKent Overstreet }; 257f57a6a5dSKent Overstreet 258f57a6a5dSKent Overstreet static inline struct bch_page_state *__bch2_page_state(struct page *page) 2591c6fdbd8SKent Overstreet { 260f57a6a5dSKent Overstreet return page_has_private(page) 261f57a6a5dSKent Overstreet ? (struct bch_page_state *) page_private(page) 262f57a6a5dSKent Overstreet : NULL; 263f57a6a5dSKent Overstreet } 2641c6fdbd8SKent Overstreet 265f57a6a5dSKent Overstreet static inline struct bch_page_state *bch2_page_state(struct page *page) 266f57a6a5dSKent Overstreet { 267e1036a2aSKent Overstreet EBUG_ON(!PageLocked(page)); 2681c6fdbd8SKent Overstreet 269f57a6a5dSKent Overstreet return __bch2_page_state(page); 270f57a6a5dSKent Overstreet } 271f57a6a5dSKent Overstreet 272f57a6a5dSKent Overstreet /* for newly allocated pages: */ 273f57a6a5dSKent Overstreet static void __bch2_page_state_release(struct page *page) 274f57a6a5dSKent Overstreet { 275f57a6a5dSKent Overstreet struct bch_page_state *s = __bch2_page_state(page); 276f57a6a5dSKent Overstreet 277f57a6a5dSKent Overstreet if (!s) 278f57a6a5dSKent Overstreet return; 279f57a6a5dSKent Overstreet 280f57a6a5dSKent Overstreet ClearPagePrivate(page); 281f57a6a5dSKent Overstreet set_page_private(page, 0); 282f57a6a5dSKent Overstreet put_page(page); 283f57a6a5dSKent Overstreet kfree(s); 284f57a6a5dSKent Overstreet } 285f57a6a5dSKent Overstreet 286f57a6a5dSKent Overstreet static void bch2_page_state_release(struct page *page) 287f57a6a5dSKent Overstreet { 288f57a6a5dSKent Overstreet struct bch_page_state *s = bch2_page_state(page); 289f57a6a5dSKent Overstreet 290f57a6a5dSKent Overstreet if (!s) 291f57a6a5dSKent Overstreet return; 292f57a6a5dSKent Overstreet 293f57a6a5dSKent Overstreet ClearPagePrivate(page); 294f57a6a5dSKent Overstreet set_page_private(page, 0); 295f57a6a5dSKent Overstreet put_page(page); 296f57a6a5dSKent Overstreet kfree(s); 297f57a6a5dSKent Overstreet } 298f57a6a5dSKent Overstreet 299f57a6a5dSKent Overstreet /* for newly allocated pages: */ 300f57a6a5dSKent Overstreet static struct bch_page_state *__bch2_page_state_create(struct page *page, 301f57a6a5dSKent Overstreet gfp_t gfp) 302f57a6a5dSKent Overstreet { 303f57a6a5dSKent Overstreet struct bch_page_state *s; 304f57a6a5dSKent Overstreet 305f57a6a5dSKent Overstreet s = kzalloc(sizeof(*s), GFP_NOFS|gfp); 306f57a6a5dSKent Overstreet if (!s) 307f57a6a5dSKent Overstreet return NULL; 308f57a6a5dSKent Overstreet 3093826ee0bSKent Overstreet spin_lock_init(&s->lock); 310f57a6a5dSKent Overstreet /* 311f57a6a5dSKent Overstreet * migrate_page_move_mapping() assumes that pages with private data 312f57a6a5dSKent Overstreet * have their count elevated by 1. 313f57a6a5dSKent Overstreet */ 314f57a6a5dSKent Overstreet get_page(page); 315f57a6a5dSKent Overstreet set_page_private(page, (unsigned long) s); 3161c6fdbd8SKent Overstreet SetPagePrivate(page); 3171c6fdbd8SKent Overstreet return s; 3181c6fdbd8SKent Overstreet } 3191c6fdbd8SKent Overstreet 320f57a6a5dSKent Overstreet static struct bch_page_state *bch2_page_state_create(struct page *page, 321f57a6a5dSKent Overstreet gfp_t gfp) 322f57a6a5dSKent Overstreet { 323f57a6a5dSKent Overstreet return bch2_page_state(page) ?: __bch2_page_state_create(page, gfp); 324f57a6a5dSKent Overstreet } 325f57a6a5dSKent Overstreet 326e1036a2aSKent Overstreet static inline unsigned inode_nr_replicas(struct bch_fs *c, struct bch_inode_info *inode) 327e1036a2aSKent Overstreet { 328e1036a2aSKent Overstreet /* XXX: this should not be open coded */ 329e1036a2aSKent Overstreet return inode->ei_inode.bi_data_replicas 330e1036a2aSKent Overstreet ? inode->ei_inode.bi_data_replicas - 1 331e1036a2aSKent Overstreet : c->opts.data_replicas; 332e1036a2aSKent Overstreet } 333e1036a2aSKent Overstreet 334f57a6a5dSKent Overstreet static inline unsigned sectors_to_reserve(struct bch_page_sector *s, 335f57a6a5dSKent Overstreet unsigned nr_replicas) 336f57a6a5dSKent Overstreet { 337f57a6a5dSKent Overstreet return max(0, (int) nr_replicas - 338f57a6a5dSKent Overstreet s->nr_replicas - 339f57a6a5dSKent Overstreet s->replicas_reserved); 340f57a6a5dSKent Overstreet } 341f57a6a5dSKent Overstreet 342f57a6a5dSKent Overstreet static int bch2_get_page_disk_reservation(struct bch_fs *c, 343f57a6a5dSKent Overstreet struct bch_inode_info *inode, 3441c6fdbd8SKent Overstreet struct page *page, bool check_enospc) 3451c6fdbd8SKent Overstreet { 346f57a6a5dSKent Overstreet struct bch_page_state *s = bch2_page_state_create(page, 0); 347e1036a2aSKent Overstreet unsigned nr_replicas = inode_nr_replicas(c, inode); 348f57a6a5dSKent Overstreet struct disk_reservation disk_res = { 0 }; 349f57a6a5dSKent Overstreet unsigned i, disk_res_sectors = 0; 350f81b648dSKent Overstreet int ret; 3511c6fdbd8SKent Overstreet 352f57a6a5dSKent Overstreet if (!s) 353f57a6a5dSKent Overstreet return -ENOMEM; 3541c6fdbd8SKent Overstreet 355f57a6a5dSKent Overstreet for (i = 0; i < ARRAY_SIZE(s->s); i++) 356f57a6a5dSKent Overstreet disk_res_sectors += sectors_to_reserve(&s->s[i], nr_replicas); 357f57a6a5dSKent Overstreet 358f57a6a5dSKent Overstreet if (!disk_res_sectors) 359f57a6a5dSKent Overstreet return 0; 360f57a6a5dSKent Overstreet 361f57a6a5dSKent Overstreet ret = bch2_disk_reservation_get(c, &disk_res, 362f57a6a5dSKent Overstreet disk_res_sectors, 1, 363f57a6a5dSKent Overstreet !check_enospc 364f57a6a5dSKent Overstreet ? BCH_DISK_RESERVATION_NOFAIL 365f57a6a5dSKent Overstreet : 0); 3661c6fdbd8SKent Overstreet if (unlikely(ret)) 367f81b648dSKent Overstreet return ret; 368f81b648dSKent Overstreet 369f57a6a5dSKent Overstreet for (i = 0; i < ARRAY_SIZE(s->s); i++) 370f57a6a5dSKent Overstreet s->s[i].replicas_reserved += 371f57a6a5dSKent Overstreet sectors_to_reserve(&s->s[i], nr_replicas); 372f57a6a5dSKent Overstreet 373f57a6a5dSKent Overstreet return 0; 3741c6fdbd8SKent Overstreet } 3751c6fdbd8SKent Overstreet 376d1542e03SKent Overstreet struct bch2_page_reservation { 377d1542e03SKent Overstreet struct disk_reservation disk; 378d1542e03SKent Overstreet struct quota_res quota; 379d1542e03SKent Overstreet }; 380d1542e03SKent Overstreet 381d1542e03SKent Overstreet static void bch2_page_reservation_init(struct bch_fs *c, 382f57a6a5dSKent Overstreet struct bch_inode_info *inode, 383d1542e03SKent Overstreet struct bch2_page_reservation *res) 384d1542e03SKent Overstreet { 385d1542e03SKent Overstreet memset(res, 0, sizeof(*res)); 386d1542e03SKent Overstreet 387d1542e03SKent Overstreet res->disk.nr_replicas = inode_nr_replicas(c, inode); 388d1542e03SKent Overstreet } 389d1542e03SKent Overstreet 390d1542e03SKent Overstreet static void bch2_page_reservation_put(struct bch_fs *c, 391d1542e03SKent Overstreet struct bch_inode_info *inode, 392d1542e03SKent Overstreet struct bch2_page_reservation *res) 393d1542e03SKent Overstreet { 394d1542e03SKent Overstreet bch2_disk_reservation_put(c, &res->disk); 395d1542e03SKent Overstreet bch2_quota_reservation_put(c, inode, &res->quota); 396d1542e03SKent Overstreet } 397d1542e03SKent Overstreet 398d1542e03SKent Overstreet static int bch2_page_reservation_get(struct bch_fs *c, 399d1542e03SKent Overstreet struct bch_inode_info *inode, struct page *page, 400d1542e03SKent Overstreet struct bch2_page_reservation *res, 401d1542e03SKent Overstreet unsigned offset, unsigned len, bool check_enospc) 402f57a6a5dSKent Overstreet { 403f57a6a5dSKent Overstreet struct bch_page_state *s = bch2_page_state_create(page, 0); 404d1542e03SKent Overstreet unsigned i, disk_sectors = 0, quota_sectors = 0; 405f57a6a5dSKent Overstreet int ret; 406f57a6a5dSKent Overstreet 407f57a6a5dSKent Overstreet if (!s) 408f57a6a5dSKent Overstreet return -ENOMEM; 409f57a6a5dSKent Overstreet 4104b0a66d5SKent Overstreet for (i = round_down(offset, block_bytes(c)) >> 9; 4114b0a66d5SKent Overstreet i < round_up(offset + len, block_bytes(c)) >> 9; 412d1542e03SKent Overstreet i++) { 413d1542e03SKent Overstreet disk_sectors += sectors_to_reserve(&s->s[i], 414d1542e03SKent Overstreet res->disk.nr_replicas); 415d1542e03SKent Overstreet quota_sectors += s->s[i].state == SECTOR_UNALLOCATED; 4161c6fdbd8SKent Overstreet } 4171c6fdbd8SKent Overstreet 418d1542e03SKent Overstreet if (disk_sectors) { 419d1542e03SKent Overstreet ret = bch2_disk_reservation_add(c, &res->disk, 420d1542e03SKent Overstreet disk_sectors, 421d1542e03SKent Overstreet !check_enospc 422d1542e03SKent Overstreet ? BCH_DISK_RESERVATION_NOFAIL 423d1542e03SKent Overstreet : 0); 424d1542e03SKent Overstreet if (unlikely(ret)) 425d1542e03SKent Overstreet return ret; 426d1542e03SKent Overstreet } 427d1542e03SKent Overstreet 428d1542e03SKent Overstreet if (quota_sectors) { 429d1542e03SKent Overstreet ret = bch2_quota_reservation_add(c, inode, &res->quota, 430d1542e03SKent Overstreet quota_sectors, 431d1542e03SKent Overstreet check_enospc); 432d1542e03SKent Overstreet if (unlikely(ret)) { 433d1542e03SKent Overstreet struct disk_reservation tmp = { 434d1542e03SKent Overstreet .sectors = disk_sectors 435d1542e03SKent Overstreet }; 436d1542e03SKent Overstreet 437d1542e03SKent Overstreet bch2_disk_reservation_put(c, &tmp); 438d1542e03SKent Overstreet res->disk.sectors -= disk_sectors; 439d1542e03SKent Overstreet return ret; 440d1542e03SKent Overstreet } 441d1542e03SKent Overstreet } 442d1542e03SKent Overstreet 443d1542e03SKent Overstreet return 0; 444f57a6a5dSKent Overstreet } 445f57a6a5dSKent Overstreet 4461c6fdbd8SKent Overstreet static void bch2_clear_page_bits(struct page *page) 4471c6fdbd8SKent Overstreet { 4481c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(page->mapping->host); 4491c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 450f57a6a5dSKent Overstreet struct bch_page_state *s = bch2_page_state(page); 451d1542e03SKent Overstreet struct disk_reservation disk_res = { 0 }; 452f57a6a5dSKent Overstreet int i, dirty_sectors = 0; 4531c6fdbd8SKent Overstreet 454f57a6a5dSKent Overstreet if (!s) 4551c6fdbd8SKent Overstreet return; 4561c6fdbd8SKent Overstreet 4573826ee0bSKent Overstreet EBUG_ON(!PageLocked(page)); 4583826ee0bSKent Overstreet EBUG_ON(PageWriteback(page)); 4593826ee0bSKent Overstreet 460f57a6a5dSKent Overstreet for (i = 0; i < ARRAY_SIZE(s->s); i++) { 461d1542e03SKent Overstreet disk_res.sectors += s->s[i].replicas_reserved; 462d1542e03SKent Overstreet s->s[i].replicas_reserved = 0; 463d1542e03SKent Overstreet 464f57a6a5dSKent Overstreet if (s->s[i].state == SECTOR_DIRTY) { 465f57a6a5dSKent Overstreet dirty_sectors++; 466f57a6a5dSKent Overstreet s->s[i].state = SECTOR_UNALLOCATED; 467f57a6a5dSKent Overstreet } 468f57a6a5dSKent Overstreet } 469adfcfaf0SKent Overstreet 470d1542e03SKent Overstreet bch2_disk_reservation_put(c, &disk_res); 471d1542e03SKent Overstreet 472f57a6a5dSKent Overstreet if (dirty_sectors) 473f57a6a5dSKent Overstreet i_sectors_acct(c, inode, NULL, -dirty_sectors); 474adfcfaf0SKent Overstreet 475f57a6a5dSKent Overstreet bch2_page_state_release(page); 4761c6fdbd8SKent Overstreet } 4771c6fdbd8SKent Overstreet 478d1542e03SKent Overstreet static void bch2_set_page_dirty(struct bch_fs *c, 479d1542e03SKent Overstreet struct bch_inode_info *inode, struct page *page, 480d1542e03SKent Overstreet struct bch2_page_reservation *res, 481d1542e03SKent Overstreet unsigned offset, unsigned len) 4821c6fdbd8SKent Overstreet { 483d1542e03SKent Overstreet struct bch_page_state *s = bch2_page_state(page); 484f57a6a5dSKent Overstreet unsigned i, dirty_sectors = 0; 4851c6fdbd8SKent Overstreet 486877dfb34SKent Overstreet WARN_ON((u64) page_offset(page) + offset + len > 487877dfb34SKent Overstreet round_up((u64) i_size_read(&inode->v), block_bytes(c))); 488fb472ac5SKent Overstreet 4893826ee0bSKent Overstreet spin_lock(&s->lock); 4903826ee0bSKent Overstreet 4914b0a66d5SKent Overstreet for (i = round_down(offset, block_bytes(c)) >> 9; 4924b0a66d5SKent Overstreet i < round_up(offset + len, block_bytes(c)) >> 9; 493d1542e03SKent Overstreet i++) { 494d1542e03SKent Overstreet unsigned sectors = sectors_to_reserve(&s->s[i], 495d1542e03SKent Overstreet res->disk.nr_replicas); 4961c6fdbd8SKent Overstreet 497406d6d5aSKent Overstreet /* 498406d6d5aSKent Overstreet * This can happen if we race with the error path in 499406d6d5aSKent Overstreet * bch2_writepage_io_done(): 500406d6d5aSKent Overstreet */ 501406d6d5aSKent Overstreet sectors = min_t(unsigned, sectors, res->disk.sectors); 502406d6d5aSKent Overstreet 503d1542e03SKent Overstreet s->s[i].replicas_reserved += sectors; 504d1542e03SKent Overstreet res->disk.sectors -= sectors; 505adfcfaf0SKent Overstreet 5062ba5d38bSKent Overstreet if (s->s[i].state == SECTOR_UNALLOCATED) 507f57a6a5dSKent Overstreet dirty_sectors++; 5082ba5d38bSKent Overstreet 5092ba5d38bSKent Overstreet s->s[i].state = max_t(unsigned, s->s[i].state, SECTOR_DIRTY); 510f57a6a5dSKent Overstreet } 511f57a6a5dSKent Overstreet 5123826ee0bSKent Overstreet spin_unlock(&s->lock); 5133826ee0bSKent Overstreet 514f57a6a5dSKent Overstreet if (dirty_sectors) 515d1542e03SKent Overstreet i_sectors_acct(c, inode, &res->quota, dirty_sectors); 5161c6fdbd8SKent Overstreet 517d1542e03SKent Overstreet if (!PageDirty(page)) 518d1542e03SKent Overstreet filemap_dirty_folio(inode->v.i_mapping, page_folio(page)); 5191c6fdbd8SKent Overstreet } 5201c6fdbd8SKent Overstreet 5211c6fdbd8SKent Overstreet vm_fault_t bch2_page_fault(struct vm_fault *vmf) 5221c6fdbd8SKent Overstreet { 5231c6fdbd8SKent Overstreet struct file *file = vmf->vma->vm_file; 5241c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 5251c6fdbd8SKent Overstreet int ret; 5261c6fdbd8SKent Overstreet 5271c6fdbd8SKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 5281c6fdbd8SKent Overstreet ret = filemap_fault(vmf); 5291c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 5301c6fdbd8SKent Overstreet 5311c6fdbd8SKent Overstreet return ret; 5321c6fdbd8SKent Overstreet } 5331c6fdbd8SKent Overstreet 5341c6fdbd8SKent Overstreet vm_fault_t bch2_page_mkwrite(struct vm_fault *vmf) 5351c6fdbd8SKent Overstreet { 5361c6fdbd8SKent Overstreet struct page *page = vmf->page; 5371c6fdbd8SKent Overstreet struct file *file = vmf->vma->vm_file; 5381c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 5391c6fdbd8SKent Overstreet struct address_space *mapping = file->f_mapping; 5401c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 541d1542e03SKent Overstreet struct bch2_page_reservation res; 5426cc3535dSKent Overstreet unsigned len; 5436cc3535dSKent Overstreet loff_t isize; 5441c6fdbd8SKent Overstreet int ret = VM_FAULT_LOCKED; 5451c6fdbd8SKent Overstreet 546d1542e03SKent Overstreet bch2_page_reservation_init(c, inode, &res); 547d1542e03SKent Overstreet 5481c6fdbd8SKent Overstreet sb_start_pagefault(inode->v.i_sb); 5491c6fdbd8SKent Overstreet file_update_time(file); 5501c6fdbd8SKent Overstreet 5511c6fdbd8SKent Overstreet /* 5521c6fdbd8SKent Overstreet * Not strictly necessary, but helps avoid dio writes livelocking in 5531c6fdbd8SKent Overstreet * write_invalidate_inode_pages_range() - can drop this if/when we get 5541c6fdbd8SKent Overstreet * a write_invalidate_inode_pages_range() that works without dropping 5551c6fdbd8SKent Overstreet * page lock before invalidating page 5561c6fdbd8SKent Overstreet */ 5571c6fdbd8SKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 5581c6fdbd8SKent Overstreet 5591c6fdbd8SKent Overstreet lock_page(page); 5606cc3535dSKent Overstreet isize = i_size_read(&inode->v); 5616cc3535dSKent Overstreet 5626cc3535dSKent Overstreet if (page->mapping != mapping || page_offset(page) >= isize) { 5631c6fdbd8SKent Overstreet unlock_page(page); 5641c6fdbd8SKent Overstreet ret = VM_FAULT_NOPAGE; 5651c6fdbd8SKent Overstreet goto out; 5661c6fdbd8SKent Overstreet } 5671c6fdbd8SKent Overstreet 568d55460bbSKent Overstreet len = min_t(loff_t, PAGE_SIZE, isize - page_offset(page)); 5696cc3535dSKent Overstreet 5706cc3535dSKent Overstreet if (bch2_page_reservation_get(c, inode, page, &res, 0, len, true)) { 5711c6fdbd8SKent Overstreet unlock_page(page); 5721c6fdbd8SKent Overstreet ret = VM_FAULT_SIGBUS; 5731c6fdbd8SKent Overstreet goto out; 5741c6fdbd8SKent Overstreet } 5751c6fdbd8SKent Overstreet 5766cc3535dSKent Overstreet bch2_set_page_dirty(c, inode, page, &res, 0, len); 5771b783a69SKent Overstreet bch2_page_reservation_put(c, inode, &res); 5781b783a69SKent Overstreet 5791c6fdbd8SKent Overstreet wait_for_stable_page(page); 5801c6fdbd8SKent Overstreet out: 5811c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 5821c6fdbd8SKent Overstreet sb_end_pagefault(inode->v.i_sb); 583d1542e03SKent Overstreet 5841c6fdbd8SKent Overstreet return ret; 5851c6fdbd8SKent Overstreet } 5861c6fdbd8SKent Overstreet 5871c6fdbd8SKent Overstreet void bch2_invalidate_folio(struct folio *folio, size_t offset, size_t length) 5881c6fdbd8SKent Overstreet { 5891c6fdbd8SKent Overstreet if (offset || length < folio_size(folio)) 5901c6fdbd8SKent Overstreet return; 5911c6fdbd8SKent Overstreet 5921c6fdbd8SKent Overstreet bch2_clear_page_bits(&folio->page); 5931c6fdbd8SKent Overstreet } 5941c6fdbd8SKent Overstreet 5951c6fdbd8SKent Overstreet bool bch2_release_folio(struct folio *folio, gfp_t gfp_mask) 5961c6fdbd8SKent Overstreet { 597a6d90385SKent Overstreet if (folio_test_dirty(folio) || folio_test_writeback(folio)) 5981c6fdbd8SKent Overstreet return false; 5991c6fdbd8SKent Overstreet 6001c6fdbd8SKent Overstreet bch2_clear_page_bits(&folio->page); 6011c6fdbd8SKent Overstreet return true; 6021c6fdbd8SKent Overstreet } 6031c6fdbd8SKent Overstreet 6041c6fdbd8SKent Overstreet /* readpage(s): */ 6051c6fdbd8SKent Overstreet 6061c6fdbd8SKent Overstreet static void bch2_readpages_end_io(struct bio *bio) 6071c6fdbd8SKent Overstreet { 6081c6fdbd8SKent Overstreet struct bvec_iter_all iter; 6091c6fdbd8SKent Overstreet struct bio_vec *bv; 6101c6fdbd8SKent Overstreet 6111c6fdbd8SKent Overstreet bio_for_each_segment_all(bv, bio, iter) { 6121c6fdbd8SKent Overstreet struct page *page = bv->bv_page; 6131c6fdbd8SKent Overstreet 6141c6fdbd8SKent Overstreet if (!bio->bi_status) { 6151c6fdbd8SKent Overstreet SetPageUptodate(page); 6161c6fdbd8SKent Overstreet } else { 6171c6fdbd8SKent Overstreet ClearPageUptodate(page); 6181c6fdbd8SKent Overstreet SetPageError(page); 6191c6fdbd8SKent Overstreet } 6201c6fdbd8SKent Overstreet unlock_page(page); 6211c6fdbd8SKent Overstreet } 6221c6fdbd8SKent Overstreet 6231c6fdbd8SKent Overstreet bio_put(bio); 6241c6fdbd8SKent Overstreet } 6251c6fdbd8SKent Overstreet 6261c6fdbd8SKent Overstreet static inline void page_state_init_for_read(struct page *page) 6271c6fdbd8SKent Overstreet { 628f81b648dSKent Overstreet SetPagePrivate(page); 629f81b648dSKent Overstreet page->private = 0; 6301c6fdbd8SKent Overstreet } 6311c6fdbd8SKent Overstreet 6321c6fdbd8SKent Overstreet struct readpages_iter { 6331c6fdbd8SKent Overstreet struct address_space *mapping; 6341c6fdbd8SKent Overstreet struct page **pages; 6351c6fdbd8SKent Overstreet unsigned nr_pages; 6361c6fdbd8SKent Overstreet unsigned idx; 6371c6fdbd8SKent Overstreet pgoff_t offset; 6381c6fdbd8SKent Overstreet }; 6391c6fdbd8SKent Overstreet 6401c6fdbd8SKent Overstreet static int readpages_iter_init(struct readpages_iter *iter, 6411c6fdbd8SKent Overstreet struct readahead_control *ractl) 6421c6fdbd8SKent Overstreet { 6431c6fdbd8SKent Overstreet unsigned i, nr_pages = readahead_count(ractl); 6441c6fdbd8SKent Overstreet 6451c6fdbd8SKent Overstreet memset(iter, 0, sizeof(*iter)); 6461c6fdbd8SKent Overstreet 6471c6fdbd8SKent Overstreet iter->mapping = ractl->mapping; 6481c6fdbd8SKent Overstreet iter->offset = readahead_index(ractl); 6491c6fdbd8SKent Overstreet iter->nr_pages = nr_pages; 6501c6fdbd8SKent Overstreet 6511c6fdbd8SKent Overstreet iter->pages = kmalloc_array(nr_pages, sizeof(struct page *), GFP_NOFS); 6521c6fdbd8SKent Overstreet if (!iter->pages) 6531c6fdbd8SKent Overstreet return -ENOMEM; 6541c6fdbd8SKent Overstreet 6551c6fdbd8SKent Overstreet __readahead_batch(ractl, iter->pages, nr_pages); 6561c6fdbd8SKent Overstreet for (i = 0; i < nr_pages; i++) { 657f57a6a5dSKent Overstreet __bch2_page_state_create(iter->pages[i], __GFP_NOFAIL); 6581c6fdbd8SKent Overstreet put_page(iter->pages[i]); 6591c6fdbd8SKent Overstreet } 6601c6fdbd8SKent Overstreet 6611c6fdbd8SKent Overstreet return 0; 6621c6fdbd8SKent Overstreet } 6631c6fdbd8SKent Overstreet 6641c6fdbd8SKent Overstreet static inline struct page *readpage_iter_next(struct readpages_iter *iter) 6651c6fdbd8SKent Overstreet { 6661c6fdbd8SKent Overstreet if (iter->idx >= iter->nr_pages) 6671c6fdbd8SKent Overstreet return NULL; 6681c6fdbd8SKent Overstreet 6691c6fdbd8SKent Overstreet EBUG_ON(iter->pages[iter->idx]->index != iter->offset + iter->idx); 6701c6fdbd8SKent Overstreet 6711c6fdbd8SKent Overstreet return iter->pages[iter->idx]; 6721c6fdbd8SKent Overstreet } 6731c6fdbd8SKent Overstreet 6741c6fdbd8SKent Overstreet static void bch2_add_page_sectors(struct bio *bio, struct bkey_s_c k) 6751c6fdbd8SKent Overstreet { 6761c6fdbd8SKent Overstreet struct bvec_iter iter; 6771c6fdbd8SKent Overstreet struct bio_vec bv; 67876426098SKent Overstreet unsigned nr_ptrs = k.k->type == KEY_TYPE_reflink_v 6794de77495SKent Overstreet ? 0 : bch2_bkey_nr_ptrs_fully_allocated(k); 6802ba5d38bSKent Overstreet unsigned state = k.k->type == KEY_TYPE_reservation 6812ba5d38bSKent Overstreet ? SECTOR_RESERVED 6822ba5d38bSKent Overstreet : SECTOR_ALLOCATED; 6831c6fdbd8SKent Overstreet 6841c6fdbd8SKent Overstreet bio_for_each_segment(bv, bio, iter) { 685f57a6a5dSKent Overstreet struct bch_page_state *s = bch2_page_state(bv.bv_page); 686f57a6a5dSKent Overstreet unsigned i; 687f81b648dSKent Overstreet 688f57a6a5dSKent Overstreet for (i = bv.bv_offset >> 9; 689f57a6a5dSKent Overstreet i < (bv.bv_offset + bv.bv_len) >> 9; 690f57a6a5dSKent Overstreet i++) { 691f57a6a5dSKent Overstreet s->s[i].nr_replicas = nr_ptrs; 6922ba5d38bSKent Overstreet s->s[i].state = state; 693f57a6a5dSKent Overstreet } 6941c6fdbd8SKent Overstreet } 6951c6fdbd8SKent Overstreet } 6961c6fdbd8SKent Overstreet 69735189e09SKent Overstreet static bool extent_partial_reads_expensive(struct bkey_s_c k) 69835189e09SKent Overstreet { 69935189e09SKent Overstreet struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k); 70035189e09SKent Overstreet struct bch_extent_crc_unpacked crc; 70135189e09SKent Overstreet const union bch_extent_entry *i; 70235189e09SKent Overstreet 70335189e09SKent Overstreet bkey_for_each_crc(k.k, ptrs, crc, i) 70435189e09SKent Overstreet if (crc.csum_type || crc.compression_type) 70535189e09SKent Overstreet return true; 70635189e09SKent Overstreet return false; 70735189e09SKent Overstreet } 70835189e09SKent Overstreet 7091c6fdbd8SKent Overstreet static void readpage_bio_extend(struct readpages_iter *iter, 71076426098SKent Overstreet struct bio *bio, 71176426098SKent Overstreet unsigned sectors_this_extent, 7121c6fdbd8SKent Overstreet bool get_more) 7131c6fdbd8SKent Overstreet { 71476426098SKent Overstreet while (bio_sectors(bio) < sectors_this_extent && 7151c6fdbd8SKent Overstreet bio->bi_vcnt < bio->bi_max_vecs) { 7161c6fdbd8SKent Overstreet pgoff_t page_offset = bio_end_sector(bio) >> PAGE_SECTOR_SHIFT; 7171c6fdbd8SKent Overstreet struct page *page = readpage_iter_next(iter); 7181c6fdbd8SKent Overstreet int ret; 7191c6fdbd8SKent Overstreet 7201c6fdbd8SKent Overstreet if (page) { 7211c6fdbd8SKent Overstreet if (iter->offset + iter->idx != page_offset) 7221c6fdbd8SKent Overstreet break; 7231c6fdbd8SKent Overstreet 7241c6fdbd8SKent Overstreet iter->idx++; 7251c6fdbd8SKent Overstreet } else { 7261c6fdbd8SKent Overstreet if (!get_more) 7271c6fdbd8SKent Overstreet break; 7281c6fdbd8SKent Overstreet 7291c6fdbd8SKent Overstreet page = xa_load(&iter->mapping->i_pages, page_offset); 7301c6fdbd8SKent Overstreet if (page && !xa_is_value(page)) 7311c6fdbd8SKent Overstreet break; 7321c6fdbd8SKent Overstreet 7331c6fdbd8SKent Overstreet page = __page_cache_alloc(readahead_gfp_mask(iter->mapping)); 7341c6fdbd8SKent Overstreet if (!page) 7351c6fdbd8SKent Overstreet break; 7361c6fdbd8SKent Overstreet 737f57a6a5dSKent Overstreet if (!__bch2_page_state_create(page, 0)) { 738f57a6a5dSKent Overstreet put_page(page); 739f57a6a5dSKent Overstreet break; 740f57a6a5dSKent Overstreet } 7411c6fdbd8SKent Overstreet 7421c6fdbd8SKent Overstreet ret = add_to_page_cache_lru(page, iter->mapping, 7431c6fdbd8SKent Overstreet page_offset, GFP_NOFS); 7441c6fdbd8SKent Overstreet if (ret) { 745f57a6a5dSKent Overstreet __bch2_page_state_release(page); 7461c6fdbd8SKent Overstreet put_page(page); 7471c6fdbd8SKent Overstreet break; 7481c6fdbd8SKent Overstreet } 7491c6fdbd8SKent Overstreet 7501c6fdbd8SKent Overstreet put_page(page); 7511c6fdbd8SKent Overstreet } 7521c6fdbd8SKent Overstreet 753885678f6SKent Overstreet BUG_ON(!bio_add_page(bio, page, PAGE_SIZE, 0)); 7541c6fdbd8SKent Overstreet } 7551c6fdbd8SKent Overstreet } 7561c6fdbd8SKent Overstreet 7570f238367SKent Overstreet static void bchfs_read(struct btree_trans *trans, struct btree_iter *iter, 7581c6fdbd8SKent Overstreet struct bch_read_bio *rbio, u64 inum, 7591c6fdbd8SKent Overstreet struct readpages_iter *readpages_iter) 7601c6fdbd8SKent Overstreet { 7610f238367SKent Overstreet struct bch_fs *c = trans->c; 76235189e09SKent Overstreet struct bkey_on_stack sk; 7631c6fdbd8SKent Overstreet int flags = BCH_READ_RETRY_IF_STALE| 7641c6fdbd8SKent Overstreet BCH_READ_MAY_PROMOTE; 76576426098SKent Overstreet int ret = 0; 7661c6fdbd8SKent Overstreet 7671c6fdbd8SKent Overstreet rbio->c = c; 7681c6fdbd8SKent Overstreet rbio->start_time = local_clock(); 76935189e09SKent Overstreet 77035189e09SKent Overstreet bkey_on_stack_init(&sk); 77176426098SKent Overstreet retry: 7721c6fdbd8SKent Overstreet while (1) { 7731c6fdbd8SKent Overstreet struct bkey_s_c k; 77476426098SKent Overstreet unsigned bytes, sectors, offset_into_extent; 7751c6fdbd8SKent Overstreet 77606ed8558SKent Overstreet bch2_btree_iter_set_pos(iter, 77706ed8558SKent Overstreet POS(inum, rbio->bio.bi_iter.bi_sector)); 7781c6fdbd8SKent Overstreet 7791c6fdbd8SKent Overstreet k = bch2_btree_iter_peek_slot(iter); 78076426098SKent Overstreet ret = bkey_err(k); 78176426098SKent Overstreet if (ret) 78276426098SKent Overstreet break; 7831c6fdbd8SKent Overstreet 7845934a0caSKent Overstreet bkey_on_stack_reassemble(&sk, c, k); 78535189e09SKent Overstreet k = bkey_i_to_s_c(sk.k); 7861c6fdbd8SKent Overstreet 78706ed8558SKent Overstreet offset_into_extent = iter->pos.offset - 78806ed8558SKent Overstreet bkey_start_offset(k.k); 78976426098SKent Overstreet sectors = k.k->size - offset_into_extent; 79076426098SKent Overstreet 7913fb5ebcdSKent Overstreet ret = bch2_read_indirect_extent(trans, 79222d8a33dSYuxuan Shui &offset_into_extent, &sk); 79376426098SKent Overstreet if (ret) 79476426098SKent Overstreet break; 79576426098SKent Overstreet 79676426098SKent Overstreet sectors = min(sectors, k.k->size - offset_into_extent); 79776426098SKent Overstreet 79876426098SKent Overstreet bch2_trans_unlock(trans); 79906ed8558SKent Overstreet 80035189e09SKent Overstreet if (readpages_iter) 80135189e09SKent Overstreet readpage_bio_extend(readpages_iter, &rbio->bio, sectors, 80235189e09SKent Overstreet extent_partial_reads_expensive(k)); 8031c6fdbd8SKent Overstreet 80476426098SKent Overstreet bytes = min(sectors, bio_sectors(&rbio->bio)) << 9; 80506ed8558SKent Overstreet swap(rbio->bio.bi_iter.bi_size, bytes); 8061c6fdbd8SKent Overstreet 80706ed8558SKent Overstreet if (rbio->bio.bi_iter.bi_size == bytes) 8081c6fdbd8SKent Overstreet flags |= BCH_READ_LAST_FRAGMENT; 8091c6fdbd8SKent Overstreet 8101c6fdbd8SKent Overstreet if (bkey_extent_is_allocation(k.k)) 81106ed8558SKent Overstreet bch2_add_page_sectors(&rbio->bio, k); 8121c6fdbd8SKent Overstreet 81306ed8558SKent Overstreet bch2_read_extent(c, rbio, k, offset_into_extent, flags); 8141c6fdbd8SKent Overstreet 8151c6fdbd8SKent Overstreet if (flags & BCH_READ_LAST_FRAGMENT) 81635189e09SKent Overstreet break; 8171c6fdbd8SKent Overstreet 81806ed8558SKent Overstreet swap(rbio->bio.bi_iter.bi_size, bytes); 81906ed8558SKent Overstreet bio_advance(&rbio->bio, bytes); 8201c6fdbd8SKent Overstreet } 82176426098SKent Overstreet 82276426098SKent Overstreet if (ret == -EINTR) 82376426098SKent Overstreet goto retry; 82476426098SKent Overstreet 82535189e09SKent Overstreet if (ret) { 82676426098SKent Overstreet bcache_io_error(c, &rbio->bio, "btree IO error %i", ret); 82776426098SKent Overstreet bio_endio(&rbio->bio); 8281c6fdbd8SKent Overstreet } 8291c6fdbd8SKent Overstreet 83035189e09SKent Overstreet bkey_on_stack_exit(&sk, c); 83135189e09SKent Overstreet } 83235189e09SKent Overstreet 8331c6fdbd8SKent Overstreet void bch2_readahead(struct readahead_control *ractl) 8341c6fdbd8SKent Overstreet { 8351c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(ractl->mapping->host); 8361c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 8379a3df993SKent Overstreet struct bch_io_opts opts = io_opts(c, &inode->ei_inode); 838424eb881SKent Overstreet struct btree_trans trans; 839424eb881SKent Overstreet struct btree_iter *iter; 8401c6fdbd8SKent Overstreet struct page *page; 8411c6fdbd8SKent Overstreet struct readpages_iter readpages_iter; 8421c6fdbd8SKent Overstreet int ret; 8431c6fdbd8SKent Overstreet 8441c6fdbd8SKent Overstreet ret = readpages_iter_init(&readpages_iter, ractl); 8451c6fdbd8SKent Overstreet BUG_ON(ret); 8461c6fdbd8SKent Overstreet 84720bceecbSKent Overstreet bch2_trans_init(&trans, c, 0, 0); 848424eb881SKent Overstreet 849424eb881SKent Overstreet iter = bch2_trans_get_iter(&trans, BTREE_ID_EXTENTS, POS_MIN, 8501c6fdbd8SKent Overstreet BTREE_ITER_SLOTS); 8511c6fdbd8SKent Overstreet 8521c6fdbd8SKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 8531c6fdbd8SKent Overstreet 8541c6fdbd8SKent Overstreet while ((page = readpage_iter_next(&readpages_iter))) { 8551c6fdbd8SKent Overstreet pgoff_t index = readpages_iter.offset + readpages_iter.idx; 8561c6fdbd8SKent Overstreet unsigned n = min_t(unsigned, 8571c6fdbd8SKent Overstreet readpages_iter.nr_pages - 8581c6fdbd8SKent Overstreet readpages_iter.idx, 8591c6fdbd8SKent Overstreet BIO_MAX_VECS); 8601c6fdbd8SKent Overstreet struct bch_read_bio *rbio = 8611c6fdbd8SKent Overstreet rbio_init(bio_alloc_bioset(NULL, n, REQ_OP_READ, 8621c6fdbd8SKent Overstreet GFP_NOFS, &c->bio_read), 8631c6fdbd8SKent Overstreet opts); 8641c6fdbd8SKent Overstreet 8651c6fdbd8SKent Overstreet readpages_iter.idx++; 8661c6fdbd8SKent Overstreet 8671c6fdbd8SKent Overstreet rbio->bio.bi_iter.bi_sector = (sector_t) index << PAGE_SECTOR_SHIFT; 8681c6fdbd8SKent Overstreet rbio->bio.bi_end_io = bch2_readpages_end_io; 869885678f6SKent Overstreet BUG_ON(!bio_add_page(&rbio->bio, page, PAGE_SIZE, 0)); 8701c6fdbd8SKent Overstreet 8710f238367SKent Overstreet bchfs_read(&trans, iter, rbio, inode->v.i_ino, 8720f238367SKent Overstreet &readpages_iter); 8731c6fdbd8SKent Overstreet } 8741c6fdbd8SKent Overstreet 8751c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 876424eb881SKent Overstreet 877424eb881SKent Overstreet bch2_trans_exit(&trans); 8781c6fdbd8SKent Overstreet kfree(readpages_iter.pages); 8791c6fdbd8SKent Overstreet } 8801c6fdbd8SKent Overstreet 8811c6fdbd8SKent Overstreet static void __bchfs_readpage(struct bch_fs *c, struct bch_read_bio *rbio, 8821c6fdbd8SKent Overstreet u64 inum, struct page *page) 8831c6fdbd8SKent Overstreet { 884424eb881SKent Overstreet struct btree_trans trans; 885424eb881SKent Overstreet struct btree_iter *iter; 8861c6fdbd8SKent Overstreet 887f57a6a5dSKent Overstreet bch2_page_state_create(page, __GFP_NOFAIL); 8881c6fdbd8SKent Overstreet 8891c6fdbd8SKent Overstreet rbio->bio.bi_opf = REQ_OP_READ|REQ_SYNC; 8907f5e31e1SKent Overstreet rbio->bio.bi_iter.bi_sector = 8917f5e31e1SKent Overstreet (sector_t) page->index << PAGE_SECTOR_SHIFT; 8927f5e31e1SKent Overstreet BUG_ON(!bio_add_page(&rbio->bio, page, PAGE_SIZE, 0)); 8931c6fdbd8SKent Overstreet 89420bceecbSKent Overstreet bch2_trans_init(&trans, c, 0, 0); 895424eb881SKent Overstreet iter = bch2_trans_get_iter(&trans, BTREE_ID_EXTENTS, POS_MIN, 8961c6fdbd8SKent Overstreet BTREE_ITER_SLOTS); 897424eb881SKent Overstreet 8980f238367SKent Overstreet bchfs_read(&trans, iter, rbio, inum, NULL); 899424eb881SKent Overstreet 900424eb881SKent Overstreet bch2_trans_exit(&trans); 9011c6fdbd8SKent Overstreet } 9021c6fdbd8SKent Overstreet 9031c6fdbd8SKent Overstreet static void bch2_read_single_page_end_io(struct bio *bio) 9041c6fdbd8SKent Overstreet { 9051c6fdbd8SKent Overstreet complete(bio->bi_private); 9061c6fdbd8SKent Overstreet } 9071c6fdbd8SKent Overstreet 9081c6fdbd8SKent Overstreet static int bch2_read_single_page(struct page *page, 9091c6fdbd8SKent Overstreet struct address_space *mapping) 9101c6fdbd8SKent Overstreet { 9111c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(mapping->host); 9121c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 9131c6fdbd8SKent Overstreet struct bch_read_bio *rbio; 9141c6fdbd8SKent Overstreet int ret; 9151c6fdbd8SKent Overstreet DECLARE_COMPLETION_ONSTACK(done); 9161c6fdbd8SKent Overstreet 9171c6fdbd8SKent Overstreet rbio = rbio_init(bio_alloc_bioset(NULL, 1, REQ_OP_READ, GFP_NOFS, &c->bio_read), 9189a3df993SKent Overstreet io_opts(c, &inode->ei_inode)); 9191c6fdbd8SKent Overstreet rbio->bio.bi_private = &done; 9201c6fdbd8SKent Overstreet rbio->bio.bi_end_io = bch2_read_single_page_end_io; 9211c6fdbd8SKent Overstreet 9221c6fdbd8SKent Overstreet __bchfs_readpage(c, rbio, inode->v.i_ino, page); 9231c6fdbd8SKent Overstreet wait_for_completion(&done); 9241c6fdbd8SKent Overstreet 9251c6fdbd8SKent Overstreet ret = blk_status_to_errno(rbio->bio.bi_status); 9261c6fdbd8SKent Overstreet bio_put(&rbio->bio); 9271c6fdbd8SKent Overstreet 9281c6fdbd8SKent Overstreet if (ret < 0) 9291c6fdbd8SKent Overstreet return ret; 9301c6fdbd8SKent Overstreet 9311c6fdbd8SKent Overstreet SetPageUptodate(page); 9321c6fdbd8SKent Overstreet return 0; 9331c6fdbd8SKent Overstreet } 9341c6fdbd8SKent Overstreet 9351c6fdbd8SKent Overstreet int bch2_read_folio(struct file *file, struct folio *folio) 9361c6fdbd8SKent Overstreet { 9371c6fdbd8SKent Overstreet struct page *page = &folio->page; 9381c6fdbd8SKent Overstreet int ret; 9391c6fdbd8SKent Overstreet 9401c6fdbd8SKent Overstreet ret = bch2_read_single_page(page, page->mapping); 9411c6fdbd8SKent Overstreet folio_unlock(folio); 9421c6fdbd8SKent Overstreet return ret; 9431c6fdbd8SKent Overstreet } 9441c6fdbd8SKent Overstreet 9451c6fdbd8SKent Overstreet /* writepages: */ 9461c6fdbd8SKent Overstreet 9471c6fdbd8SKent Overstreet struct bch_writepage_state { 9481c6fdbd8SKent Overstreet struct bch_writepage_io *io; 9491c6fdbd8SKent Overstreet struct bch_io_opts opts; 9501c6fdbd8SKent Overstreet }; 9511c6fdbd8SKent Overstreet 9521c6fdbd8SKent Overstreet static inline struct bch_writepage_state bch_writepage_state_init(struct bch_fs *c, 9531c6fdbd8SKent Overstreet struct bch_inode_info *inode) 9541c6fdbd8SKent Overstreet { 9559a3df993SKent Overstreet return (struct bch_writepage_state) { 9569a3df993SKent Overstreet .opts = io_opts(c, &inode->ei_inode) 9579a3df993SKent Overstreet }; 9581c6fdbd8SKent Overstreet } 9591c6fdbd8SKent Overstreet 9601c6fdbd8SKent Overstreet static void bch2_writepage_io_free(struct closure *cl) 9611c6fdbd8SKent Overstreet { 9621c6fdbd8SKent Overstreet struct bch_writepage_io *io = container_of(cl, 9631c6fdbd8SKent Overstreet struct bch_writepage_io, cl); 9641c6fdbd8SKent Overstreet 9659a3df993SKent Overstreet bio_put(&io->op.wbio.bio); 9661c6fdbd8SKent Overstreet } 9671c6fdbd8SKent Overstreet 9681c6fdbd8SKent Overstreet static void bch2_writepage_io_done(struct closure *cl) 9691c6fdbd8SKent Overstreet { 9701c6fdbd8SKent Overstreet struct bch_writepage_io *io = container_of(cl, 9711c6fdbd8SKent Overstreet struct bch_writepage_io, cl); 9729a3df993SKent Overstreet struct bch_fs *c = io->op.c; 9739a3df993SKent Overstreet struct bio *bio = &io->op.wbio.bio; 9741c6fdbd8SKent Overstreet struct bvec_iter_all iter; 9751c6fdbd8SKent Overstreet struct bio_vec *bvec; 976b3fce09cSKent Overstreet unsigned i; 9771c6fdbd8SKent Overstreet 9789a3df993SKent Overstreet if (io->op.error) { 97975812e70SKent Overstreet bio_for_each_segment_all(bvec, bio, iter) { 980b3fce09cSKent Overstreet struct bch_page_state *s; 981b3fce09cSKent Overstreet 9821c6fdbd8SKent Overstreet SetPageError(bvec->bv_page); 98375812e70SKent Overstreet mapping_set_error(bvec->bv_page->mapping, -EIO); 984b3fce09cSKent Overstreet 9853826ee0bSKent Overstreet s = __bch2_page_state(bvec->bv_page); 9863826ee0bSKent Overstreet spin_lock(&s->lock); 987b3fce09cSKent Overstreet for (i = 0; i < PAGE_SECTORS; i++) 988b3fce09cSKent Overstreet s->s[i].nr_replicas = 0; 9893826ee0bSKent Overstreet spin_unlock(&s->lock); 99075812e70SKent Overstreet } 9911c6fdbd8SKent Overstreet } 9921c6fdbd8SKent Overstreet 9934be1a412SKent Overstreet if (io->op.flags & BCH_WRITE_WROTE_DATA_INLINE) { 9944be1a412SKent Overstreet bio_for_each_segment_all(bvec, bio, iter) { 9954be1a412SKent Overstreet struct bch_page_state *s; 9964be1a412SKent Overstreet 9974be1a412SKent Overstreet s = __bch2_page_state(bvec->bv_page); 9984be1a412SKent Overstreet spin_lock(&s->lock); 9994be1a412SKent Overstreet for (i = 0; i < PAGE_SECTORS; i++) 10004be1a412SKent Overstreet s->s[i].nr_replicas = 0; 10014be1a412SKent Overstreet spin_unlock(&s->lock); 10024be1a412SKent Overstreet } 10034be1a412SKent Overstreet } 10044be1a412SKent Overstreet 10051c6fdbd8SKent Overstreet /* 10061c6fdbd8SKent Overstreet * racing with fallocate can cause us to add fewer sectors than 10071c6fdbd8SKent Overstreet * expected - but we shouldn't add more sectors than expected: 10081c6fdbd8SKent Overstreet */ 10099a3df993SKent Overstreet BUG_ON(io->op.i_sectors_delta > 0); 10101c6fdbd8SKent Overstreet 10111c6fdbd8SKent Overstreet /* 10121c6fdbd8SKent Overstreet * (error (due to going RO) halfway through a page can screw that up 10131c6fdbd8SKent Overstreet * slightly) 10141c6fdbd8SKent Overstreet * XXX wtf? 10159a3df993SKent Overstreet BUG_ON(io->op.op.i_sectors_delta >= PAGE_SECTORS); 10161c6fdbd8SKent Overstreet */ 10171c6fdbd8SKent Overstreet 10181c6fdbd8SKent Overstreet /* 10191c6fdbd8SKent Overstreet * PageWriteback is effectively our ref on the inode - fixup i_blocks 10201c6fdbd8SKent Overstreet * before calling end_page_writeback: 10211c6fdbd8SKent Overstreet */ 10229a3df993SKent Overstreet i_sectors_acct(c, io->inode, NULL, io->op.i_sectors_delta); 10231c6fdbd8SKent Overstreet 10247f5e31e1SKent Overstreet bio_for_each_segment_all(bvec, bio, iter) { 10257f5e31e1SKent Overstreet struct bch_page_state *s = __bch2_page_state(bvec->bv_page); 10267f5e31e1SKent Overstreet 10277f5e31e1SKent Overstreet if (atomic_dec_and_test(&s->write_count)) 10281c6fdbd8SKent Overstreet end_page_writeback(bvec->bv_page); 10297f5e31e1SKent Overstreet } 10301c6fdbd8SKent Overstreet 10311c6fdbd8SKent Overstreet closure_return_with_destructor(&io->cl, bch2_writepage_io_free); 10321c6fdbd8SKent Overstreet } 10331c6fdbd8SKent Overstreet 10341c6fdbd8SKent Overstreet static void bch2_writepage_do_io(struct bch_writepage_state *w) 10351c6fdbd8SKent Overstreet { 10361c6fdbd8SKent Overstreet struct bch_writepage_io *io = w->io; 10371c6fdbd8SKent Overstreet 10381c6fdbd8SKent Overstreet w->io = NULL; 10399a3df993SKent Overstreet closure_call(&io->op.cl, bch2_write, NULL, &io->cl); 10401c6fdbd8SKent Overstreet continue_at(&io->cl, bch2_writepage_io_done, NULL); 10411c6fdbd8SKent Overstreet } 10421c6fdbd8SKent Overstreet 10431c6fdbd8SKent Overstreet /* 10441c6fdbd8SKent Overstreet * Get a bch_writepage_io and add @page to it - appending to an existing one if 10451c6fdbd8SKent Overstreet * possible, else allocating a new one: 10461c6fdbd8SKent Overstreet */ 10471c6fdbd8SKent Overstreet static void bch2_writepage_io_alloc(struct bch_fs *c, 104850fe5bd6SKent Overstreet struct writeback_control *wbc, 10491c6fdbd8SKent Overstreet struct bch_writepage_state *w, 10501c6fdbd8SKent Overstreet struct bch_inode_info *inode, 10517f5e31e1SKent Overstreet u64 sector, 10521c6fdbd8SKent Overstreet unsigned nr_replicas) 10531c6fdbd8SKent Overstreet { 10541c6fdbd8SKent Overstreet struct bch_write_op *op; 10551c6fdbd8SKent Overstreet 10561c6fdbd8SKent Overstreet w->io = container_of(bio_alloc_bioset(NULL, BIO_MAX_VECS, 10571c6fdbd8SKent Overstreet REQ_OP_WRITE, 10581c6fdbd8SKent Overstreet GFP_NOFS, 10591c6fdbd8SKent Overstreet &c->writepage_bioset), 10609a3df993SKent Overstreet struct bch_writepage_io, op.wbio.bio); 10611c6fdbd8SKent Overstreet 10621c6fdbd8SKent Overstreet closure_init(&w->io->cl, NULL); 10639a3df993SKent Overstreet w->io->inode = inode; 10649a3df993SKent Overstreet 10659a3df993SKent Overstreet op = &w->io->op; 10669a3df993SKent Overstreet bch2_write_op_init(op, c, w->opts); 10679a3df993SKent Overstreet op->target = w->opts.foreground_target; 10689a3df993SKent Overstreet op_journal_seq_set(op, &inode->ei_journal_seq); 10691c6fdbd8SKent Overstreet op->nr_replicas = nr_replicas; 10701c6fdbd8SKent Overstreet op->res.nr_replicas = nr_replicas; 10711c6fdbd8SKent Overstreet op->write_point = writepoint_hashed(inode->ei_last_dirtied); 10727f5e31e1SKent Overstreet op->pos = POS(inode->v.i_ino, sector); 10737f5e31e1SKent Overstreet op->wbio.bio.bi_iter.bi_sector = sector; 107450fe5bd6SKent Overstreet op->wbio.bio.bi_opf = wbc_to_write_flags(wbc); 10751c6fdbd8SKent Overstreet } 10761c6fdbd8SKent Overstreet 10771c6fdbd8SKent Overstreet static int __bch2_writepage(struct folio *folio, 10781c6fdbd8SKent Overstreet struct writeback_control *wbc, 10791c6fdbd8SKent Overstreet void *data) 10801c6fdbd8SKent Overstreet { 10811c6fdbd8SKent Overstreet struct page *page = &folio->page; 10821c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(page->mapping->host); 10831c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 10841c6fdbd8SKent Overstreet struct bch_writepage_state *w = data; 10857f5e31e1SKent Overstreet struct bch_page_state *s, orig; 10867f5e31e1SKent Overstreet unsigned i, offset, nr_replicas_this_write = U32_MAX; 10871c6fdbd8SKent Overstreet loff_t i_size = i_size_read(&inode->v); 10881c6fdbd8SKent Overstreet pgoff_t end_index = i_size >> PAGE_SHIFT; 1089e1036a2aSKent Overstreet int ret; 10901c6fdbd8SKent Overstreet 10911c6fdbd8SKent Overstreet EBUG_ON(!PageUptodate(page)); 10921c6fdbd8SKent Overstreet 10931c6fdbd8SKent Overstreet /* Is the page fully inside i_size? */ 10941c6fdbd8SKent Overstreet if (page->index < end_index) 10951c6fdbd8SKent Overstreet goto do_io; 10961c6fdbd8SKent Overstreet 10971c6fdbd8SKent Overstreet /* Is the page fully outside i_size? (truncate in progress) */ 10981c6fdbd8SKent Overstreet offset = i_size & (PAGE_SIZE - 1); 10991c6fdbd8SKent Overstreet if (page->index > end_index || !offset) { 11001c6fdbd8SKent Overstreet unlock_page(page); 11011c6fdbd8SKent Overstreet return 0; 11021c6fdbd8SKent Overstreet } 11031c6fdbd8SKent Overstreet 11041c6fdbd8SKent Overstreet /* 11051c6fdbd8SKent Overstreet * The page straddles i_size. It must be zeroed out on each and every 11061c6fdbd8SKent Overstreet * writepage invocation because it may be mmapped. "A file is mapped 11071c6fdbd8SKent Overstreet * in multiples of the page size. For a file that is not a multiple of 11081c6fdbd8SKent Overstreet * the page size, the remaining memory is zeroed when mapped, and 11091c6fdbd8SKent Overstreet * writes to that region are not written out to the file." 11101c6fdbd8SKent Overstreet */ 11111c6fdbd8SKent Overstreet zero_user_segment(page, offset, PAGE_SIZE); 11121c6fdbd8SKent Overstreet do_io: 1113f57a6a5dSKent Overstreet s = bch2_page_state_create(page, __GFP_NOFAIL); 1114f81b648dSKent Overstreet 1115f57a6a5dSKent Overstreet ret = bch2_get_page_disk_reservation(c, inode, page, true); 1116e1036a2aSKent Overstreet if (ret) { 1117e1036a2aSKent Overstreet SetPageError(page); 1118e1036a2aSKent Overstreet mapping_set_error(page->mapping, ret); 1119e1036a2aSKent Overstreet unlock_page(page); 1120e1036a2aSKent Overstreet return 0; 1121e1036a2aSKent Overstreet } 1122e1036a2aSKent Overstreet 11237f5e31e1SKent Overstreet /* Before unlocking the page, get copy of reservations: */ 11247f5e31e1SKent Overstreet orig = *s; 11257f5e31e1SKent Overstreet 11267f5e31e1SKent Overstreet for (i = 0; i < PAGE_SECTORS; i++) { 11272ba5d38bSKent Overstreet if (s->s[i].state < SECTOR_DIRTY) 11287f5e31e1SKent Overstreet continue; 11297f5e31e1SKent Overstreet 1130f81b648dSKent Overstreet nr_replicas_this_write = 1131f57a6a5dSKent Overstreet min_t(unsigned, nr_replicas_this_write, 1132f57a6a5dSKent Overstreet s->s[i].nr_replicas + 1133f57a6a5dSKent Overstreet s->s[i].replicas_reserved); 11347f5e31e1SKent Overstreet } 11351c6fdbd8SKent Overstreet 1136f57a6a5dSKent Overstreet for (i = 0; i < PAGE_SECTORS; i++) { 11372ba5d38bSKent Overstreet if (s->s[i].state < SECTOR_DIRTY) 11387f5e31e1SKent Overstreet continue; 11397f5e31e1SKent Overstreet 1140f57a6a5dSKent Overstreet s->s[i].nr_replicas = w->opts.compression 1141f57a6a5dSKent Overstreet ? 0 : nr_replicas_this_write; 1142e1036a2aSKent Overstreet 1143f57a6a5dSKent Overstreet s->s[i].replicas_reserved = 0; 1144f57a6a5dSKent Overstreet s->s[i].state = SECTOR_ALLOCATED; 1145f57a6a5dSKent Overstreet } 11461c6fdbd8SKent Overstreet 11477f5e31e1SKent Overstreet BUG_ON(atomic_read(&s->write_count)); 11487f5e31e1SKent Overstreet atomic_set(&s->write_count, 1); 11497f5e31e1SKent Overstreet 11501c6fdbd8SKent Overstreet BUG_ON(PageWriteback(page)); 11511c6fdbd8SKent Overstreet set_page_writeback(page); 11527f5e31e1SKent Overstreet 11531c6fdbd8SKent Overstreet unlock_page(page); 11541c6fdbd8SKent Overstreet 11557f5e31e1SKent Overstreet offset = 0; 11567f5e31e1SKent Overstreet while (1) { 11577f5e31e1SKent Overstreet unsigned sectors = 1, dirty_sectors = 0, reserved_sectors = 0; 11587f5e31e1SKent Overstreet u64 sector; 11597f5e31e1SKent Overstreet 11607f5e31e1SKent Overstreet while (offset < PAGE_SECTORS && 11612ba5d38bSKent Overstreet orig.s[offset].state < SECTOR_DIRTY) 11627f5e31e1SKent Overstreet offset++; 11637f5e31e1SKent Overstreet 11647f5e31e1SKent Overstreet if (offset == PAGE_SECTORS) 11657f5e31e1SKent Overstreet break; 11667f5e31e1SKent Overstreet 11677f5e31e1SKent Overstreet sector = ((u64) page->index << PAGE_SECTOR_SHIFT) + offset; 11687f5e31e1SKent Overstreet 11697f5e31e1SKent Overstreet while (offset + sectors < PAGE_SECTORS && 11702ba5d38bSKent Overstreet orig.s[offset + sectors].state >= SECTOR_DIRTY) 11717f5e31e1SKent Overstreet sectors++; 11727f5e31e1SKent Overstreet 11737f5e31e1SKent Overstreet for (i = offset; i < offset + sectors; i++) { 11747f5e31e1SKent Overstreet reserved_sectors += orig.s[i].replicas_reserved; 11757f5e31e1SKent Overstreet dirty_sectors += orig.s[i].state == SECTOR_DIRTY; 11767f5e31e1SKent Overstreet } 11777f5e31e1SKent Overstreet 11781c6fdbd8SKent Overstreet if (w->io && 11799a3df993SKent Overstreet (w->io->op.res.nr_replicas != nr_replicas_this_write || 11809a3df993SKent Overstreet bio_full(&w->io->op.wbio.bio, PAGE_SIZE) || 1181f59b3464SKent Overstreet w->io->op.wbio.bio.bi_iter.bi_size + (sectors << 9) >= 1182f59b3464SKent Overstreet (BIO_MAX_VECS * PAGE_SIZE) || 11839a3df993SKent Overstreet bio_end_sector(&w->io->op.wbio.bio) != sector)) 11841c6fdbd8SKent Overstreet bch2_writepage_do_io(w); 11851c6fdbd8SKent Overstreet 11861c6fdbd8SKent Overstreet if (!w->io) 118750fe5bd6SKent Overstreet bch2_writepage_io_alloc(c, wbc, w, inode, sector, 1188f81b648dSKent Overstreet nr_replicas_this_write); 11891c6fdbd8SKent Overstreet 11907f5e31e1SKent Overstreet atomic_inc(&s->write_count); 11917f5e31e1SKent Overstreet 11929a3df993SKent Overstreet BUG_ON(inode != w->io->inode); 11939a3df993SKent Overstreet BUG_ON(!bio_add_page(&w->io->op.wbio.bio, page, 11947f5e31e1SKent Overstreet sectors << 9, offset << 9)); 11951c6fdbd8SKent Overstreet 11966cc3535dSKent Overstreet /* Check for writing past i_size: */ 11979a3df993SKent Overstreet WARN_ON((bio_end_sector(&w->io->op.wbio.bio) << 9) > 11986cc3535dSKent Overstreet round_up(i_size, block_bytes(c))); 11996cc3535dSKent Overstreet 12009a3df993SKent Overstreet w->io->op.res.sectors += reserved_sectors; 12019a3df993SKent Overstreet w->io->op.i_sectors_delta -= dirty_sectors; 12021c6fdbd8SKent Overstreet w->io->op.new_i_size = i_size; 12031c6fdbd8SKent Overstreet 12047f5e31e1SKent Overstreet offset += sectors; 12057f5e31e1SKent Overstreet } 12067f5e31e1SKent Overstreet 12077f5e31e1SKent Overstreet if (atomic_dec_and_test(&s->write_count)) 12087f5e31e1SKent Overstreet end_page_writeback(page); 12097f5e31e1SKent Overstreet 12101c6fdbd8SKent Overstreet return 0; 12111c6fdbd8SKent Overstreet } 12121c6fdbd8SKent Overstreet 12131c6fdbd8SKent Overstreet int bch2_writepages(struct address_space *mapping, struct writeback_control *wbc) 12141c6fdbd8SKent Overstreet { 12151c6fdbd8SKent Overstreet struct bch_fs *c = mapping->host->i_sb->s_fs_info; 12161c6fdbd8SKent Overstreet struct bch_writepage_state w = 12171c6fdbd8SKent Overstreet bch_writepage_state_init(c, to_bch_ei(mapping->host)); 12181c6fdbd8SKent Overstreet struct blk_plug plug; 12191c6fdbd8SKent Overstreet int ret; 12201c6fdbd8SKent Overstreet 12211c6fdbd8SKent Overstreet blk_start_plug(&plug); 12221c6fdbd8SKent Overstreet ret = write_cache_pages(mapping, wbc, __bch2_writepage, &w); 12231c6fdbd8SKent Overstreet if (w.io) 12241c6fdbd8SKent Overstreet bch2_writepage_do_io(&w); 12251c6fdbd8SKent Overstreet blk_finish_plug(&plug); 12261c6fdbd8SKent Overstreet return ret; 12271c6fdbd8SKent Overstreet } 12281c6fdbd8SKent Overstreet 12291c6fdbd8SKent Overstreet int bch2_writepage(struct page *page, struct writeback_control *wbc) 12301c6fdbd8SKent Overstreet { 12311c6fdbd8SKent Overstreet struct bch_fs *c = page->mapping->host->i_sb->s_fs_info; 12321c6fdbd8SKent Overstreet struct bch_writepage_state w = 12331c6fdbd8SKent Overstreet bch_writepage_state_init(c, to_bch_ei(page->mapping->host)); 12341c6fdbd8SKent Overstreet int ret; 12351c6fdbd8SKent Overstreet 12361c6fdbd8SKent Overstreet ret = __bch2_writepage(page_folio(page), wbc, &w); 12371c6fdbd8SKent Overstreet if (w.io) 12381c6fdbd8SKent Overstreet bch2_writepage_do_io(&w); 12391c6fdbd8SKent Overstreet 12401c6fdbd8SKent Overstreet return ret; 12411c6fdbd8SKent Overstreet } 12421c6fdbd8SKent Overstreet 12431c6fdbd8SKent Overstreet /* buffered writes: */ 12441c6fdbd8SKent Overstreet 12451c6fdbd8SKent Overstreet int bch2_write_begin(struct file *file, struct address_space *mapping, 12461c6fdbd8SKent Overstreet loff_t pos, unsigned len, 12471c6fdbd8SKent Overstreet struct page **pagep, void **fsdata) 12481c6fdbd8SKent Overstreet { 12491c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(mapping->host); 12501c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 1251d1542e03SKent Overstreet struct bch2_page_reservation *res; 12521c6fdbd8SKent Overstreet pgoff_t index = pos >> PAGE_SHIFT; 12531c6fdbd8SKent Overstreet unsigned offset = pos & (PAGE_SIZE - 1); 12541c6fdbd8SKent Overstreet struct page *page; 12551c6fdbd8SKent Overstreet int ret = -ENOMEM; 12561c6fdbd8SKent Overstreet 1257d1542e03SKent Overstreet res = kmalloc(sizeof(*res), GFP_KERNEL); 1258d1542e03SKent Overstreet if (!res) 1259d1542e03SKent Overstreet return -ENOMEM; 1260d1542e03SKent Overstreet 1261d1542e03SKent Overstreet bch2_page_reservation_init(c, inode, res); 1262d1542e03SKent Overstreet *fsdata = res; 12631c6fdbd8SKent Overstreet 12641c6fdbd8SKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 12651c6fdbd8SKent Overstreet 12661c6fdbd8SKent Overstreet page = grab_cache_page_write_begin(mapping, index); 12671c6fdbd8SKent Overstreet if (!page) 12681c6fdbd8SKent Overstreet goto err_unlock; 12691c6fdbd8SKent Overstreet 12701c6fdbd8SKent Overstreet if (PageUptodate(page)) 12711c6fdbd8SKent Overstreet goto out; 12721c6fdbd8SKent Overstreet 12731c6fdbd8SKent Overstreet /* If we're writing entire page, don't need to read it in first: */ 12741c6fdbd8SKent Overstreet if (len == PAGE_SIZE) 12751c6fdbd8SKent Overstreet goto out; 12761c6fdbd8SKent Overstreet 12771c6fdbd8SKent Overstreet if (!offset && pos + len >= inode->v.i_size) { 12781c6fdbd8SKent Overstreet zero_user_segment(page, len, PAGE_SIZE); 12791c6fdbd8SKent Overstreet flush_dcache_page(page); 12801c6fdbd8SKent Overstreet goto out; 12811c6fdbd8SKent Overstreet } 12821c6fdbd8SKent Overstreet 12831c6fdbd8SKent Overstreet if (index > inode->v.i_size >> PAGE_SHIFT) { 12841c6fdbd8SKent Overstreet zero_user_segments(page, 0, offset, offset + len, PAGE_SIZE); 12851c6fdbd8SKent Overstreet flush_dcache_page(page); 12861c6fdbd8SKent Overstreet goto out; 12871c6fdbd8SKent Overstreet } 12881c6fdbd8SKent Overstreet readpage: 12891c6fdbd8SKent Overstreet ret = bch2_read_single_page(page, mapping); 12901c6fdbd8SKent Overstreet if (ret) 12911c6fdbd8SKent Overstreet goto err; 12921c6fdbd8SKent Overstreet out: 1293d1542e03SKent Overstreet ret = bch2_page_reservation_get(c, inode, page, res, 1294d1542e03SKent Overstreet offset, len, true); 12951c6fdbd8SKent Overstreet if (ret) { 12961c6fdbd8SKent Overstreet if (!PageUptodate(page)) { 12971c6fdbd8SKent Overstreet /* 12981c6fdbd8SKent Overstreet * If the page hasn't been read in, we won't know if we 12991c6fdbd8SKent Overstreet * actually need a reservation - we don't actually need 13001c6fdbd8SKent Overstreet * to read here, we just need to check if the page is 13011c6fdbd8SKent Overstreet * fully backed by uncompressed data: 13021c6fdbd8SKent Overstreet */ 13031c6fdbd8SKent Overstreet goto readpage; 13041c6fdbd8SKent Overstreet } 13051c6fdbd8SKent Overstreet 13061c6fdbd8SKent Overstreet goto err; 13071c6fdbd8SKent Overstreet } 13081c6fdbd8SKent Overstreet 13091c6fdbd8SKent Overstreet *pagep = page; 13101c6fdbd8SKent Overstreet return 0; 13111c6fdbd8SKent Overstreet err: 13121c6fdbd8SKent Overstreet unlock_page(page); 13131c6fdbd8SKent Overstreet put_page(page); 13141c6fdbd8SKent Overstreet *pagep = NULL; 13151c6fdbd8SKent Overstreet err_unlock: 13161c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 1317d1542e03SKent Overstreet kfree(res); 1318d1542e03SKent Overstreet *fsdata = NULL; 13191c6fdbd8SKent Overstreet return ret; 13201c6fdbd8SKent Overstreet } 13211c6fdbd8SKent Overstreet 13221c6fdbd8SKent Overstreet int bch2_write_end(struct file *file, struct address_space *mapping, 13231c6fdbd8SKent Overstreet loff_t pos, unsigned len, unsigned copied, 13241c6fdbd8SKent Overstreet struct page *page, void *fsdata) 13251c6fdbd8SKent Overstreet { 13261c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(mapping->host); 13271c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 1328d1542e03SKent Overstreet struct bch2_page_reservation *res = fsdata; 1329d1542e03SKent Overstreet unsigned offset = pos & (PAGE_SIZE - 1); 13301c6fdbd8SKent Overstreet 13311c6fdbd8SKent Overstreet lockdep_assert_held(&inode->v.i_rwsem); 13321c6fdbd8SKent Overstreet 13331c6fdbd8SKent Overstreet if (unlikely(copied < len && !PageUptodate(page))) { 13341c6fdbd8SKent Overstreet /* 13351c6fdbd8SKent Overstreet * The page needs to be read in, but that would destroy 13361c6fdbd8SKent Overstreet * our partial write - simplest thing is to just force 13371c6fdbd8SKent Overstreet * userspace to redo the write: 13381c6fdbd8SKent Overstreet */ 13391c6fdbd8SKent Overstreet zero_user(page, 0, PAGE_SIZE); 13401c6fdbd8SKent Overstreet flush_dcache_page(page); 13411c6fdbd8SKent Overstreet copied = 0; 13421c6fdbd8SKent Overstreet } 13431c6fdbd8SKent Overstreet 13441c6fdbd8SKent Overstreet spin_lock(&inode->v.i_lock); 13451c6fdbd8SKent Overstreet if (pos + copied > inode->v.i_size) 13461c6fdbd8SKent Overstreet i_size_write(&inode->v, pos + copied); 13471c6fdbd8SKent Overstreet spin_unlock(&inode->v.i_lock); 13481c6fdbd8SKent Overstreet 13491c6fdbd8SKent Overstreet if (copied) { 13501c6fdbd8SKent Overstreet if (!PageUptodate(page)) 13511c6fdbd8SKent Overstreet SetPageUptodate(page); 1352d1542e03SKent Overstreet 1353d1542e03SKent Overstreet bch2_set_page_dirty(c, inode, page, res, offset, copied); 13541c6fdbd8SKent Overstreet 13551c6fdbd8SKent Overstreet inode->ei_last_dirtied = (unsigned long) current; 13561c6fdbd8SKent Overstreet } 13571c6fdbd8SKent Overstreet 13581c6fdbd8SKent Overstreet unlock_page(page); 13591c6fdbd8SKent Overstreet put_page(page); 13601c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 13611c6fdbd8SKent Overstreet 1362d1542e03SKent Overstreet bch2_page_reservation_put(c, inode, res); 1363d1542e03SKent Overstreet kfree(res); 1364d1542e03SKent Overstreet 13651c6fdbd8SKent Overstreet return copied; 13661c6fdbd8SKent Overstreet } 13671c6fdbd8SKent Overstreet 13681c6fdbd8SKent Overstreet #define WRITE_BATCH_PAGES 32 13691c6fdbd8SKent Overstreet 13701c6fdbd8SKent Overstreet static int __bch2_buffered_write(struct bch_inode_info *inode, 13711c6fdbd8SKent Overstreet struct address_space *mapping, 13721c6fdbd8SKent Overstreet struct iov_iter *iter, 13731c6fdbd8SKent Overstreet loff_t pos, unsigned len) 13741c6fdbd8SKent Overstreet { 13751c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 13761c6fdbd8SKent Overstreet struct page *pages[WRITE_BATCH_PAGES]; 1377d1542e03SKent Overstreet struct bch2_page_reservation res; 13781c6fdbd8SKent Overstreet unsigned long index = pos >> PAGE_SHIFT; 13791c6fdbd8SKent Overstreet unsigned offset = pos & (PAGE_SIZE - 1); 13801c6fdbd8SKent Overstreet unsigned nr_pages = DIV_ROUND_UP(offset + len, PAGE_SIZE); 1381d1542e03SKent Overstreet unsigned i, reserved = 0, set_dirty = 0; 1382d1542e03SKent Overstreet unsigned copied = 0, nr_pages_copied = 0; 13831c6fdbd8SKent Overstreet int ret = 0; 13841c6fdbd8SKent Overstreet 13851c6fdbd8SKent Overstreet BUG_ON(!len); 13861c6fdbd8SKent Overstreet BUG_ON(nr_pages > ARRAY_SIZE(pages)); 13871c6fdbd8SKent Overstreet 1388d1542e03SKent Overstreet bch2_page_reservation_init(c, inode, &res); 1389d1542e03SKent Overstreet 13901c6fdbd8SKent Overstreet for (i = 0; i < nr_pages; i++) { 13911c6fdbd8SKent Overstreet pages[i] = grab_cache_page_write_begin(mapping, index + i); 13921c6fdbd8SKent Overstreet if (!pages[i]) { 13931c6fdbd8SKent Overstreet nr_pages = i; 13948de819f8SKent Overstreet if (!i) { 13951c6fdbd8SKent Overstreet ret = -ENOMEM; 13961c6fdbd8SKent Overstreet goto out; 13971c6fdbd8SKent Overstreet } 13988de819f8SKent Overstreet len = min_t(unsigned, len, 13998de819f8SKent Overstreet nr_pages * PAGE_SIZE - offset); 14008de819f8SKent Overstreet break; 14018de819f8SKent Overstreet } 14021c6fdbd8SKent Overstreet } 14031c6fdbd8SKent Overstreet 14041c6fdbd8SKent Overstreet if (offset && !PageUptodate(pages[0])) { 14051c6fdbd8SKent Overstreet ret = bch2_read_single_page(pages[0], mapping); 14061c6fdbd8SKent Overstreet if (ret) 14071c6fdbd8SKent Overstreet goto out; 14081c6fdbd8SKent Overstreet } 14091c6fdbd8SKent Overstreet 14101c6fdbd8SKent Overstreet if ((pos + len) & (PAGE_SIZE - 1) && 14111c6fdbd8SKent Overstreet !PageUptodate(pages[nr_pages - 1])) { 14121c6fdbd8SKent Overstreet if ((index + nr_pages - 1) << PAGE_SHIFT >= inode->v.i_size) { 14131c6fdbd8SKent Overstreet zero_user(pages[nr_pages - 1], 0, PAGE_SIZE); 14141c6fdbd8SKent Overstreet } else { 14151c6fdbd8SKent Overstreet ret = bch2_read_single_page(pages[nr_pages - 1], mapping); 14161c6fdbd8SKent Overstreet if (ret) 14171c6fdbd8SKent Overstreet goto out; 14181c6fdbd8SKent Overstreet } 14191c6fdbd8SKent Overstreet } 14201c6fdbd8SKent Overstreet 1421d1542e03SKent Overstreet while (reserved < len) { 1422d1542e03SKent Overstreet struct page *page = pages[(offset + reserved) >> PAGE_SHIFT]; 1423d1542e03SKent Overstreet unsigned pg_offset = (offset + reserved) & (PAGE_SIZE - 1); 1424d1542e03SKent Overstreet unsigned pg_len = min_t(unsigned, len - reserved, 1425d1542e03SKent Overstreet PAGE_SIZE - pg_offset); 1426d1542e03SKent Overstreet retry_reservation: 1427d1542e03SKent Overstreet ret = bch2_page_reservation_get(c, inode, page, &res, 1428d1542e03SKent Overstreet pg_offset, pg_len, true); 14291c6fdbd8SKent Overstreet 1430d1542e03SKent Overstreet if (ret && !PageUptodate(page)) { 1431d1542e03SKent Overstreet ret = bch2_read_single_page(page, mapping); 1432d1542e03SKent Overstreet if (!ret) 1433d1542e03SKent Overstreet goto retry_reservation; 14341c6fdbd8SKent Overstreet } 14351c6fdbd8SKent Overstreet 14361c6fdbd8SKent Overstreet if (ret) 14371c6fdbd8SKent Overstreet goto out; 1438d1542e03SKent Overstreet 1439d1542e03SKent Overstreet reserved += pg_len; 14401c6fdbd8SKent Overstreet } 14411c6fdbd8SKent Overstreet 14421c6fdbd8SKent Overstreet if (mapping_writably_mapped(mapping)) 14431c6fdbd8SKent Overstreet for (i = 0; i < nr_pages; i++) 14441c6fdbd8SKent Overstreet flush_dcache_page(pages[i]); 14451c6fdbd8SKent Overstreet 14461c6fdbd8SKent Overstreet while (copied < len) { 14471c6fdbd8SKent Overstreet struct page *page = pages[(offset + copied) >> PAGE_SHIFT]; 14481c6fdbd8SKent Overstreet unsigned pg_offset = (offset + copied) & (PAGE_SIZE - 1); 1449d1542e03SKent Overstreet unsigned pg_len = min_t(unsigned, len - copied, 14501c6fdbd8SKent Overstreet PAGE_SIZE - pg_offset); 14511c6fdbd8SKent Overstreet unsigned pg_copied = copy_page_from_iter_atomic(page, 1452d1542e03SKent Overstreet pg_offset, pg_len, iter); 1453d1542e03SKent Overstreet 1454d1542e03SKent Overstreet if (!pg_copied) 1455d1542e03SKent Overstreet break; 14561c6fdbd8SKent Overstreet 1457*912bdf17SKent Overstreet if (!PageUptodate(page) && 1458*912bdf17SKent Overstreet pg_copied != PAGE_SIZE && 1459*912bdf17SKent Overstreet pos + copied + pg_copied < inode->v.i_size) { 1460*912bdf17SKent Overstreet zero_user(page, 0, PAGE_SIZE); 1461*912bdf17SKent Overstreet break; 1462*912bdf17SKent Overstreet } 1463*912bdf17SKent Overstreet 14641c6fdbd8SKent Overstreet flush_dcache_page(page); 14651c6fdbd8SKent Overstreet copied += pg_copied; 1466*912bdf17SKent Overstreet 1467*912bdf17SKent Overstreet if (pg_copied != pg_len) 1468*912bdf17SKent Overstreet break; 14691c6fdbd8SKent Overstreet } 14701c6fdbd8SKent Overstreet 14711c6fdbd8SKent Overstreet if (!copied) 14721c6fdbd8SKent Overstreet goto out; 14731c6fdbd8SKent Overstreet 1474877dfb34SKent Overstreet spin_lock(&inode->v.i_lock); 1475877dfb34SKent Overstreet if (pos + copied > inode->v.i_size) 1476877dfb34SKent Overstreet i_size_write(&inode->v, pos + copied); 1477877dfb34SKent Overstreet spin_unlock(&inode->v.i_lock); 1478877dfb34SKent Overstreet 1479d1542e03SKent Overstreet while (set_dirty < copied) { 1480d1542e03SKent Overstreet struct page *page = pages[(offset + set_dirty) >> PAGE_SHIFT]; 1481d1542e03SKent Overstreet unsigned pg_offset = (offset + set_dirty) & (PAGE_SIZE - 1); 1482d1542e03SKent Overstreet unsigned pg_len = min_t(unsigned, copied - set_dirty, 1483d1542e03SKent Overstreet PAGE_SIZE - pg_offset); 1484d1542e03SKent Overstreet 1485d1542e03SKent Overstreet if (!PageUptodate(page)) 1486d1542e03SKent Overstreet SetPageUptodate(page); 1487d1542e03SKent Overstreet 1488d1542e03SKent Overstreet bch2_set_page_dirty(c, inode, page, &res, pg_offset, pg_len); 1489d1542e03SKent Overstreet unlock_page(page); 1490d1542e03SKent Overstreet put_page(page); 1491d1542e03SKent Overstreet 1492d1542e03SKent Overstreet set_dirty += pg_len; 1493d1542e03SKent Overstreet } 1494877dfb34SKent Overstreet 1495877dfb34SKent Overstreet nr_pages_copied = DIV_ROUND_UP(offset + copied, PAGE_SIZE); 1496877dfb34SKent Overstreet inode->ei_last_dirtied = (unsigned long) current; 14971c6fdbd8SKent Overstreet out: 1498d1542e03SKent Overstreet for (i = nr_pages_copied; i < nr_pages; i++) { 14991c6fdbd8SKent Overstreet unlock_page(pages[i]); 15001c6fdbd8SKent Overstreet put_page(pages[i]); 15011c6fdbd8SKent Overstreet } 15021c6fdbd8SKent Overstreet 1503d1542e03SKent Overstreet bch2_page_reservation_put(c, inode, &res); 15041c6fdbd8SKent Overstreet 15051c6fdbd8SKent Overstreet return copied ?: ret; 15061c6fdbd8SKent Overstreet } 15071c6fdbd8SKent Overstreet 15081c6fdbd8SKent Overstreet static ssize_t bch2_buffered_write(struct kiocb *iocb, struct iov_iter *iter) 15091c6fdbd8SKent Overstreet { 15101c6fdbd8SKent Overstreet struct file *file = iocb->ki_filp; 15111c6fdbd8SKent Overstreet struct address_space *mapping = file->f_mapping; 15121c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 15131c6fdbd8SKent Overstreet loff_t pos = iocb->ki_pos; 15141c6fdbd8SKent Overstreet ssize_t written = 0; 15151c6fdbd8SKent Overstreet int ret = 0; 15161c6fdbd8SKent Overstreet 15171c6fdbd8SKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 15181c6fdbd8SKent Overstreet 15191c6fdbd8SKent Overstreet do { 15201c6fdbd8SKent Overstreet unsigned offset = pos & (PAGE_SIZE - 1); 15211c6fdbd8SKent Overstreet unsigned bytes = min_t(unsigned long, iov_iter_count(iter), 15221c6fdbd8SKent Overstreet PAGE_SIZE * WRITE_BATCH_PAGES - offset); 15231c6fdbd8SKent Overstreet again: 15241c6fdbd8SKent Overstreet /* 15251c6fdbd8SKent Overstreet * Bring in the user page that we will copy from _first_. 15261c6fdbd8SKent Overstreet * Otherwise there's a nasty deadlock on copying from the 15271c6fdbd8SKent Overstreet * same page as we're writing to, without it being marked 15281c6fdbd8SKent Overstreet * up-to-date. 15291c6fdbd8SKent Overstreet * 15301c6fdbd8SKent Overstreet * Not only is this an optimisation, but it is also required 15311c6fdbd8SKent Overstreet * to check that the address is actually valid, when atomic 15321c6fdbd8SKent Overstreet * usercopies are used, below. 15331c6fdbd8SKent Overstreet */ 15341c6fdbd8SKent Overstreet if (unlikely(fault_in_iov_iter_readable(iter, bytes))) { 15351c6fdbd8SKent Overstreet bytes = min_t(unsigned long, iov_iter_count(iter), 15361c6fdbd8SKent Overstreet PAGE_SIZE - offset); 15371c6fdbd8SKent Overstreet 15381c6fdbd8SKent Overstreet if (unlikely(fault_in_iov_iter_readable(iter, bytes))) { 15391c6fdbd8SKent Overstreet ret = -EFAULT; 15401c6fdbd8SKent Overstreet break; 15411c6fdbd8SKent Overstreet } 15421c6fdbd8SKent Overstreet } 15431c6fdbd8SKent Overstreet 15441c6fdbd8SKent Overstreet if (unlikely(fatal_signal_pending(current))) { 15451c6fdbd8SKent Overstreet ret = -EINTR; 15461c6fdbd8SKent Overstreet break; 15471c6fdbd8SKent Overstreet } 15481c6fdbd8SKent Overstreet 15491c6fdbd8SKent Overstreet ret = __bch2_buffered_write(inode, mapping, iter, pos, bytes); 15501c6fdbd8SKent Overstreet if (unlikely(ret < 0)) 15511c6fdbd8SKent Overstreet break; 15521c6fdbd8SKent Overstreet 15531c6fdbd8SKent Overstreet cond_resched(); 15541c6fdbd8SKent Overstreet 15551c6fdbd8SKent Overstreet if (unlikely(ret == 0)) { 15561c6fdbd8SKent Overstreet /* 15571c6fdbd8SKent Overstreet * If we were unable to copy any data at all, we must 15581c6fdbd8SKent Overstreet * fall back to a single segment length write. 15591c6fdbd8SKent Overstreet * 15601c6fdbd8SKent Overstreet * If we didn't fallback here, we could livelock 15611c6fdbd8SKent Overstreet * because not all segments in the iov can be copied at 15621c6fdbd8SKent Overstreet * once without a pagefault. 15631c6fdbd8SKent Overstreet */ 15641c6fdbd8SKent Overstreet bytes = min_t(unsigned long, PAGE_SIZE - offset, 15651c6fdbd8SKent Overstreet iov_iter_single_seg_count(iter)); 15661c6fdbd8SKent Overstreet goto again; 15671c6fdbd8SKent Overstreet } 15681c6fdbd8SKent Overstreet pos += ret; 15691c6fdbd8SKent Overstreet written += ret; 1570*912bdf17SKent Overstreet ret = 0; 15711c6fdbd8SKent Overstreet 15721c6fdbd8SKent Overstreet balance_dirty_pages_ratelimited(mapping); 15731c6fdbd8SKent Overstreet } while (iov_iter_count(iter)); 15741c6fdbd8SKent Overstreet 15751c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 15761c6fdbd8SKent Overstreet 15771c6fdbd8SKent Overstreet return written ? written : ret; 15781c6fdbd8SKent Overstreet } 15791c6fdbd8SKent Overstreet 15801c6fdbd8SKent Overstreet /* O_DIRECT reads */ 15811c6fdbd8SKent Overstreet 15821c6fdbd8SKent Overstreet static void bch2_dio_read_complete(struct closure *cl) 15831c6fdbd8SKent Overstreet { 15841c6fdbd8SKent Overstreet struct dio_read *dio = container_of(cl, struct dio_read, cl); 15851c6fdbd8SKent Overstreet 15861c6fdbd8SKent Overstreet dio->req->ki_complete(dio->req, dio->ret); 15871c6fdbd8SKent Overstreet bio_check_pages_dirty(&dio->rbio.bio); /* transfers ownership */ 15881c6fdbd8SKent Overstreet } 15891c6fdbd8SKent Overstreet 15901c6fdbd8SKent Overstreet static void bch2_direct_IO_read_endio(struct bio *bio) 15911c6fdbd8SKent Overstreet { 15921c6fdbd8SKent Overstreet struct dio_read *dio = bio->bi_private; 15931c6fdbd8SKent Overstreet 15941c6fdbd8SKent Overstreet if (bio->bi_status) 15951c6fdbd8SKent Overstreet dio->ret = blk_status_to_errno(bio->bi_status); 15961c6fdbd8SKent Overstreet 15971c6fdbd8SKent Overstreet closure_put(&dio->cl); 15981c6fdbd8SKent Overstreet } 15991c6fdbd8SKent Overstreet 16001c6fdbd8SKent Overstreet static void bch2_direct_IO_read_split_endio(struct bio *bio) 16011c6fdbd8SKent Overstreet { 16021c6fdbd8SKent Overstreet bch2_direct_IO_read_endio(bio); 16031c6fdbd8SKent Overstreet bio_check_pages_dirty(bio); /* transfers ownership */ 16041c6fdbd8SKent Overstreet } 16051c6fdbd8SKent Overstreet 16061c6fdbd8SKent Overstreet static int bch2_direct_IO_read(struct kiocb *req, struct iov_iter *iter) 16071c6fdbd8SKent Overstreet { 16081c6fdbd8SKent Overstreet struct file *file = req->ki_filp; 16091c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 16101c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 16119a3df993SKent Overstreet struct bch_io_opts opts = io_opts(c, &inode->ei_inode); 16121c6fdbd8SKent Overstreet struct dio_read *dio; 16131c6fdbd8SKent Overstreet struct bio *bio; 16141c6fdbd8SKent Overstreet loff_t offset = req->ki_pos; 16151c6fdbd8SKent Overstreet bool sync = is_sync_kiocb(req); 16161c6fdbd8SKent Overstreet size_t shorten; 16171c6fdbd8SKent Overstreet ssize_t ret; 16181c6fdbd8SKent Overstreet 16191c6fdbd8SKent Overstreet if ((offset|iter->count) & (block_bytes(c) - 1)) 16201c6fdbd8SKent Overstreet return -EINVAL; 16211c6fdbd8SKent Overstreet 16221c6fdbd8SKent Overstreet ret = min_t(loff_t, iter->count, 16231c6fdbd8SKent Overstreet max_t(loff_t, 0, i_size_read(&inode->v) - offset)); 16241c6fdbd8SKent Overstreet 16251c6fdbd8SKent Overstreet if (!ret) 16261c6fdbd8SKent Overstreet return ret; 16271c6fdbd8SKent Overstreet 16281c6fdbd8SKent Overstreet shorten = iov_iter_count(iter) - round_up(ret, block_bytes(c)); 16291c6fdbd8SKent Overstreet iter->count -= shorten; 16301c6fdbd8SKent Overstreet 16311c6fdbd8SKent Overstreet bio = bio_alloc_bioset(NULL, 16321c6fdbd8SKent Overstreet iov_iter_npages(iter, BIO_MAX_VECS), 16331c6fdbd8SKent Overstreet REQ_OP_READ, 16341c6fdbd8SKent Overstreet GFP_KERNEL, 16351c6fdbd8SKent Overstreet &c->dio_read_bioset); 16361c6fdbd8SKent Overstreet 16371c6fdbd8SKent Overstreet bio->bi_end_io = bch2_direct_IO_read_endio; 16381c6fdbd8SKent Overstreet 16391c6fdbd8SKent Overstreet dio = container_of(bio, struct dio_read, rbio.bio); 16401c6fdbd8SKent Overstreet closure_init(&dio->cl, NULL); 16411c6fdbd8SKent Overstreet 16421c6fdbd8SKent Overstreet /* 16431c6fdbd8SKent Overstreet * this is a _really_ horrible hack just to avoid an atomic sub at the 16441c6fdbd8SKent Overstreet * end: 16451c6fdbd8SKent Overstreet */ 16461c6fdbd8SKent Overstreet if (!sync) { 16471c6fdbd8SKent Overstreet set_closure_fn(&dio->cl, bch2_dio_read_complete, NULL); 16481c6fdbd8SKent Overstreet atomic_set(&dio->cl.remaining, 16491c6fdbd8SKent Overstreet CLOSURE_REMAINING_INITIALIZER - 16501c6fdbd8SKent Overstreet CLOSURE_RUNNING + 16511c6fdbd8SKent Overstreet CLOSURE_DESTRUCTOR); 16521c6fdbd8SKent Overstreet } else { 16531c6fdbd8SKent Overstreet atomic_set(&dio->cl.remaining, 16541c6fdbd8SKent Overstreet CLOSURE_REMAINING_INITIALIZER + 1); 16551c6fdbd8SKent Overstreet } 16561c6fdbd8SKent Overstreet 16571c6fdbd8SKent Overstreet dio->req = req; 16581c6fdbd8SKent Overstreet dio->ret = ret; 16591c6fdbd8SKent Overstreet 16601c6fdbd8SKent Overstreet goto start; 16611c6fdbd8SKent Overstreet while (iter->count) { 16621c6fdbd8SKent Overstreet bio = bio_alloc_bioset(NULL, 16631c6fdbd8SKent Overstreet iov_iter_npages(iter, BIO_MAX_VECS), 16641c6fdbd8SKent Overstreet REQ_OP_READ, 16651c6fdbd8SKent Overstreet GFP_KERNEL, 16661c6fdbd8SKent Overstreet &c->bio_read); 16671c6fdbd8SKent Overstreet bio->bi_end_io = bch2_direct_IO_read_split_endio; 16681c6fdbd8SKent Overstreet start: 16691c6fdbd8SKent Overstreet bio->bi_opf = REQ_OP_READ|REQ_SYNC; 16701c6fdbd8SKent Overstreet bio->bi_iter.bi_sector = offset >> 9; 16711c6fdbd8SKent Overstreet bio->bi_private = dio; 16721c6fdbd8SKent Overstreet 16731c6fdbd8SKent Overstreet ret = bio_iov_iter_get_pages(bio, iter); 16741c6fdbd8SKent Overstreet if (ret < 0) { 16751c6fdbd8SKent Overstreet /* XXX: fault inject this path */ 16761c6fdbd8SKent Overstreet bio->bi_status = BLK_STS_RESOURCE; 16771c6fdbd8SKent Overstreet bio_endio(bio); 16781c6fdbd8SKent Overstreet break; 16791c6fdbd8SKent Overstreet } 16801c6fdbd8SKent Overstreet 16811c6fdbd8SKent Overstreet offset += bio->bi_iter.bi_size; 16821c6fdbd8SKent Overstreet bio_set_pages_dirty(bio); 16831c6fdbd8SKent Overstreet 16841c6fdbd8SKent Overstreet if (iter->count) 16851c6fdbd8SKent Overstreet closure_get(&dio->cl); 16861c6fdbd8SKent Overstreet 16871c6fdbd8SKent Overstreet bch2_read(c, rbio_init(bio, opts), inode->v.i_ino); 16881c6fdbd8SKent Overstreet } 16891c6fdbd8SKent Overstreet 16901c6fdbd8SKent Overstreet iter->count += shorten; 16911c6fdbd8SKent Overstreet 16921c6fdbd8SKent Overstreet if (sync) { 16931c6fdbd8SKent Overstreet closure_sync(&dio->cl); 16941c6fdbd8SKent Overstreet closure_debug_destroy(&dio->cl); 16951c6fdbd8SKent Overstreet ret = dio->ret; 16961c6fdbd8SKent Overstreet bio_check_pages_dirty(&dio->rbio.bio); /* transfers ownership */ 16971c6fdbd8SKent Overstreet return ret; 16981c6fdbd8SKent Overstreet } else { 16991c6fdbd8SKent Overstreet return -EIOCBQUEUED; 17001c6fdbd8SKent Overstreet } 17011c6fdbd8SKent Overstreet } 17021c6fdbd8SKent Overstreet 17031c6fdbd8SKent Overstreet ssize_t bch2_read_iter(struct kiocb *iocb, struct iov_iter *iter) 17041c6fdbd8SKent Overstreet { 17051c6fdbd8SKent Overstreet struct file *file = iocb->ki_filp; 17061c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 17071c6fdbd8SKent Overstreet struct address_space *mapping = file->f_mapping; 17081c6fdbd8SKent Overstreet size_t count = iov_iter_count(iter); 17091c6fdbd8SKent Overstreet ssize_t ret; 17101c6fdbd8SKent Overstreet 17111c6fdbd8SKent Overstreet if (!count) 17121c6fdbd8SKent Overstreet return 0; /* skip atime */ 17131c6fdbd8SKent Overstreet 17141c6fdbd8SKent Overstreet if (iocb->ki_flags & IOCB_DIRECT) { 17151c6fdbd8SKent Overstreet struct blk_plug plug; 17161c6fdbd8SKent Overstreet 1717a023127aSKent Overstreet if (unlikely(mapping->nrpages)) { 17181c6fdbd8SKent Overstreet ret = filemap_write_and_wait_range(mapping, 17191c6fdbd8SKent Overstreet iocb->ki_pos, 17201c6fdbd8SKent Overstreet iocb->ki_pos + count - 1); 17211c6fdbd8SKent Overstreet if (ret < 0) 17221c6fdbd8SKent Overstreet return ret; 1723a023127aSKent Overstreet } 17241c6fdbd8SKent Overstreet 17251c6fdbd8SKent Overstreet file_accessed(file); 17261c6fdbd8SKent Overstreet 17271c6fdbd8SKent Overstreet blk_start_plug(&plug); 17281c6fdbd8SKent Overstreet ret = bch2_direct_IO_read(iocb, iter); 17291c6fdbd8SKent Overstreet blk_finish_plug(&plug); 17301c6fdbd8SKent Overstreet 17311c6fdbd8SKent Overstreet if (ret >= 0) 17321c6fdbd8SKent Overstreet iocb->ki_pos += ret; 17331c6fdbd8SKent Overstreet } else { 17341c6fdbd8SKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 17351c6fdbd8SKent Overstreet ret = generic_file_read_iter(iocb, iter); 17361c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 17371c6fdbd8SKent Overstreet } 17381c6fdbd8SKent Overstreet 17391c6fdbd8SKent Overstreet return ret; 17401c6fdbd8SKent Overstreet } 17411c6fdbd8SKent Overstreet 17421c6fdbd8SKent Overstreet /* O_DIRECT writes */ 17431c6fdbd8SKent Overstreet 17441c6fdbd8SKent Overstreet /* 17451c6fdbd8SKent Overstreet * We're going to return -EIOCBQUEUED, but we haven't finished consuming the 17461c6fdbd8SKent Overstreet * iov_iter yet, so we need to stash a copy of the iovec: it might be on the 17471c6fdbd8SKent Overstreet * caller's stack, we're not guaranteed that it will live for the duration of 17481c6fdbd8SKent Overstreet * the IO: 17491c6fdbd8SKent Overstreet */ 17501c6fdbd8SKent Overstreet static noinline int bch2_dio_write_copy_iov(struct dio_write *dio) 17511c6fdbd8SKent Overstreet { 17521c6fdbd8SKent Overstreet struct iovec *iov = dio->inline_vecs; 17531c6fdbd8SKent Overstreet 17541c6fdbd8SKent Overstreet /* 17551c6fdbd8SKent Overstreet * iov_iter has a single embedded iovec - nothing to do: 17561c6fdbd8SKent Overstreet */ 17571c6fdbd8SKent Overstreet if (iter_is_ubuf(&dio->iter)) 17581c6fdbd8SKent Overstreet return 0; 17591c6fdbd8SKent Overstreet 17601c6fdbd8SKent Overstreet /* 17611c6fdbd8SKent Overstreet * We don't currently handle non-iovec iov_iters here - return an error, 17621c6fdbd8SKent Overstreet * and we'll fall back to doing the IO synchronously: 17631c6fdbd8SKent Overstreet */ 17641c6fdbd8SKent Overstreet if (!iter_is_iovec(&dio->iter)) 17651c6fdbd8SKent Overstreet return -1; 17661c6fdbd8SKent Overstreet 17671c6fdbd8SKent Overstreet if (dio->iter.nr_segs > ARRAY_SIZE(dio->inline_vecs)) { 17681c6fdbd8SKent Overstreet iov = kmalloc_array(dio->iter.nr_segs, sizeof(*iov), 17691c6fdbd8SKent Overstreet GFP_KERNEL); 17701c6fdbd8SKent Overstreet if (unlikely(!iov)) 17711c6fdbd8SKent Overstreet return -ENOMEM; 17721c6fdbd8SKent Overstreet 17731c6fdbd8SKent Overstreet dio->free_iov = true; 17741c6fdbd8SKent Overstreet } 17751c6fdbd8SKent Overstreet 17761c6fdbd8SKent Overstreet memcpy(iov, dio->iter.__iov, dio->iter.nr_segs * sizeof(*iov)); 17771c6fdbd8SKent Overstreet dio->iter.__iov = iov; 17781c6fdbd8SKent Overstreet return 0; 17791c6fdbd8SKent Overstreet } 17801c6fdbd8SKent Overstreet 1781042a1f26SKent Overstreet static void bch2_dio_write_loop_async(struct bch_write_op *); 1782042a1f26SKent Overstreet 17831c6fdbd8SKent Overstreet static long bch2_dio_write_loop(struct dio_write *dio) 17841c6fdbd8SKent Overstreet { 1785ed484030SKent Overstreet bool kthread = (current->flags & PF_KTHREAD) != 0; 17861c6fdbd8SKent Overstreet struct kiocb *req = dio->req; 17871c6fdbd8SKent Overstreet struct address_space *mapping = req->ki_filp->f_mapping; 17889a3df993SKent Overstreet struct bch_inode_info *inode = file_bch_inode(req->ki_filp); 1789042a1f26SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 17909a3df993SKent Overstreet struct bio *bio = &dio->op.wbio.bio; 17911c6fdbd8SKent Overstreet struct bvec_iter_all iter; 17921c6fdbd8SKent Overstreet struct bio_vec *bv; 17930a426c32SKent Overstreet unsigned unaligned; 1794286d8ad0SKent Overstreet bool sync = dio->sync; 17951c6fdbd8SKent Overstreet long ret; 17961c6fdbd8SKent Overstreet 17971c6fdbd8SKent Overstreet if (dio->loop) 17981c6fdbd8SKent Overstreet goto loop; 17991c6fdbd8SKent Overstreet 18001c6fdbd8SKent Overstreet while (1) { 1801ed484030SKent Overstreet if (kthread) 1802ed484030SKent Overstreet kthread_use_mm(dio->mm); 18031c6fdbd8SKent Overstreet BUG_ON(current->faults_disabled_mapping); 18041c6fdbd8SKent Overstreet current->faults_disabled_mapping = mapping; 18051c6fdbd8SKent Overstreet 18061c6fdbd8SKent Overstreet ret = bio_iov_iter_get_pages(bio, &dio->iter); 18071c6fdbd8SKent Overstreet 18081c6fdbd8SKent Overstreet current->faults_disabled_mapping = NULL; 1809ed484030SKent Overstreet if (kthread) 1810ed484030SKent Overstreet kthread_unuse_mm(dio->mm); 18111c6fdbd8SKent Overstreet 18121c6fdbd8SKent Overstreet if (unlikely(ret < 0)) 18131c6fdbd8SKent Overstreet goto err; 18141c6fdbd8SKent Overstreet 18150a426c32SKent Overstreet unaligned = bio->bi_iter.bi_size & (block_bytes(c) - 1); 18160a426c32SKent Overstreet bio->bi_iter.bi_size -= unaligned; 18170a426c32SKent Overstreet iov_iter_revert(&dio->iter, unaligned); 18180a426c32SKent Overstreet 18190a426c32SKent Overstreet if (!bio->bi_iter.bi_size) { 18200a426c32SKent Overstreet /* 18210a426c32SKent Overstreet * bio_iov_iter_get_pages was only able to get < 18220a426c32SKent Overstreet * blocksize worth of pages: 18230a426c32SKent Overstreet */ 18240a426c32SKent Overstreet bio_for_each_segment_all(bv, bio, iter) 18250a426c32SKent Overstreet put_page(bv->bv_page); 18260a426c32SKent Overstreet ret = -EFAULT; 18270a426c32SKent Overstreet goto err; 18280a426c32SKent Overstreet } 18290a426c32SKent Overstreet 1830042a1f26SKent Overstreet bch2_write_op_init(&dio->op, c, io_opts(c, &inode->ei_inode)); 1831042a1f26SKent Overstreet dio->op.end_io = bch2_dio_write_loop_async; 1832042a1f26SKent Overstreet dio->op.target = dio->op.opts.foreground_target; 1833042a1f26SKent Overstreet op_journal_seq_set(&dio->op, &inode->ei_journal_seq); 1834042a1f26SKent Overstreet dio->op.write_point = writepoint_hashed((unsigned long) current); 1835042a1f26SKent Overstreet dio->op.nr_replicas = dio->op.opts.data_replicas; 1836042a1f26SKent Overstreet dio->op.pos = POS(inode->v.i_ino, (u64) req->ki_pos >> 9); 1837042a1f26SKent Overstreet 1838042a1f26SKent Overstreet if ((req->ki_flags & IOCB_DSYNC) && 1839042a1f26SKent Overstreet !c->opts.journal_flush_disabled) 1840042a1f26SKent Overstreet dio->op.flags |= BCH_WRITE_FLUSH; 1841042a1f26SKent Overstreet 1842042a1f26SKent Overstreet ret = bch2_disk_reservation_get(c, &dio->op.res, bio_sectors(bio), 1843042a1f26SKent Overstreet dio->op.opts.data_replicas, 0); 1844042a1f26SKent Overstreet if (unlikely(ret) && 1845042a1f26SKent Overstreet !bch2_check_range_allocated(c, dio->op.pos, 1846042a1f26SKent Overstreet bio_sectors(bio), dio->op.opts.data_replicas)) 1847042a1f26SKent Overstreet goto err; 18481c6fdbd8SKent Overstreet 18491c6fdbd8SKent Overstreet task_io_account_write(bio->bi_iter.bi_size); 18501c6fdbd8SKent Overstreet 18511c6fdbd8SKent Overstreet if (!dio->sync && !dio->loop && dio->iter.count) { 18521c6fdbd8SKent Overstreet if (bch2_dio_write_copy_iov(dio)) { 1853286d8ad0SKent Overstreet dio->sync = sync = true; 1854f8f30863SKent Overstreet goto do_io; 18551c6fdbd8SKent Overstreet } 18561c6fdbd8SKent Overstreet } 1857f8f30863SKent Overstreet do_io: 18581c6fdbd8SKent Overstreet dio->loop = true; 1859f8f30863SKent Overstreet closure_call(&dio->op.cl, bch2_write, NULL, NULL); 18601c6fdbd8SKent Overstreet 1861286d8ad0SKent Overstreet if (sync) 1862f8f30863SKent Overstreet wait_for_completion(&dio->done); 1863f8f30863SKent Overstreet else 18641c6fdbd8SKent Overstreet return -EIOCBQUEUED; 18651c6fdbd8SKent Overstreet loop: 18669a3df993SKent Overstreet i_sectors_acct(c, inode, &dio->quota_res, 18679a3df993SKent Overstreet dio->op.i_sectors_delta); 1868042a1f26SKent Overstreet req->ki_pos += (u64) dio->op.written << 9; 1869042a1f26SKent Overstreet dio->written += dio->op.written; 18709a3df993SKent Overstreet 18719a3df993SKent Overstreet spin_lock(&inode->v.i_lock); 1872042a1f26SKent Overstreet if (req->ki_pos > inode->v.i_size) 1873042a1f26SKent Overstreet i_size_write(&inode->v, req->ki_pos); 18749a3df993SKent Overstreet spin_unlock(&inode->v.i_lock); 18759a3df993SKent Overstreet 18761c6fdbd8SKent Overstreet bio_for_each_segment_all(bv, bio, iter) 18771c6fdbd8SKent Overstreet put_page(bv->bv_page); 18789a3df993SKent Overstreet if (!dio->iter.count || dio->op.error) 18791c6fdbd8SKent Overstreet break; 1880f8f30863SKent Overstreet 18811c6fdbd8SKent Overstreet bio_reset(bio, NULL, REQ_OP_WRITE); 1882f8f30863SKent Overstreet reinit_completion(&dio->done); 18831c6fdbd8SKent Overstreet } 18841c6fdbd8SKent Overstreet 1885042a1f26SKent Overstreet ret = dio->op.error ?: ((long) dio->written << 9); 18861c6fdbd8SKent Overstreet err: 18871c6fdbd8SKent Overstreet bch2_pagecache_block_put(&inode->ei_pagecache_lock); 18880a426c32SKent Overstreet bch2_quota_reservation_put(c, inode, &dio->quota_res); 18891c6fdbd8SKent Overstreet 18901c6fdbd8SKent Overstreet if (dio->free_iov) 18911c6fdbd8SKent Overstreet kfree(dio->iter.__iov); 18921c6fdbd8SKent Overstreet 18931c6fdbd8SKent Overstreet bio_put(bio); 18941c6fdbd8SKent Overstreet 18951c6fdbd8SKent Overstreet /* inode->i_dio_count is our ref on inode and thus bch_fs */ 18961c6fdbd8SKent Overstreet inode_dio_end(&inode->v); 18971c6fdbd8SKent Overstreet 18981c6fdbd8SKent Overstreet if (!sync) { 18991c6fdbd8SKent Overstreet req->ki_complete(req, ret); 19001c6fdbd8SKent Overstreet ret = -EIOCBQUEUED; 19011c6fdbd8SKent Overstreet } 19021c6fdbd8SKent Overstreet return ret; 19031c6fdbd8SKent Overstreet } 19041c6fdbd8SKent Overstreet 1905f8f30863SKent Overstreet static void bch2_dio_write_loop_async(struct bch_write_op *op) 19061c6fdbd8SKent Overstreet { 1907f8f30863SKent Overstreet struct dio_write *dio = container_of(op, struct dio_write, op); 19081c6fdbd8SKent Overstreet 1909f8f30863SKent Overstreet if (dio->sync) 1910f8f30863SKent Overstreet complete(&dio->done); 1911f8f30863SKent Overstreet else 19121c6fdbd8SKent Overstreet bch2_dio_write_loop(dio); 19131c6fdbd8SKent Overstreet } 19141c6fdbd8SKent Overstreet 19151c6fdbd8SKent Overstreet static noinline 19161c6fdbd8SKent Overstreet ssize_t bch2_direct_write(struct kiocb *req, struct iov_iter *iter) 19171c6fdbd8SKent Overstreet { 19181c6fdbd8SKent Overstreet struct file *file = req->ki_filp; 191954847d25SKent Overstreet struct address_space *mapping = file->f_mapping; 19201c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 19211c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 19221c6fdbd8SKent Overstreet struct dio_write *dio; 19231c6fdbd8SKent Overstreet struct bio *bio; 19247edcfbfeSKent Overstreet bool locked = true, extending; 19251c6fdbd8SKent Overstreet ssize_t ret; 19261c6fdbd8SKent Overstreet 19277edcfbfeSKent Overstreet prefetch(&c->opts); 19287edcfbfeSKent Overstreet prefetch((void *) &c->opts + 64); 19297edcfbfeSKent Overstreet prefetch(&inode->ei_inode); 19307edcfbfeSKent Overstreet prefetch((void *) &inode->ei_inode + 64); 19311c6fdbd8SKent Overstreet 19327edcfbfeSKent Overstreet inode_lock(&inode->v); 19337edcfbfeSKent Overstreet 19347edcfbfeSKent Overstreet ret = generic_write_checks(req, iter); 19357edcfbfeSKent Overstreet if (unlikely(ret <= 0)) 19367edcfbfeSKent Overstreet goto err; 19377edcfbfeSKent Overstreet 19387edcfbfeSKent Overstreet ret = file_remove_privs(file); 19397edcfbfeSKent Overstreet if (unlikely(ret)) 19407edcfbfeSKent Overstreet goto err; 19417edcfbfeSKent Overstreet 19427edcfbfeSKent Overstreet ret = file_update_time(file); 19437edcfbfeSKent Overstreet if (unlikely(ret)) 19447edcfbfeSKent Overstreet goto err; 19451c6fdbd8SKent Overstreet 1946919dbbd1SKent Overstreet if (unlikely((req->ki_pos|iter->count) & (block_bytes(c) - 1))) 19477edcfbfeSKent Overstreet goto err; 19487edcfbfeSKent Overstreet 19497edcfbfeSKent Overstreet inode_dio_begin(&inode->v); 19507edcfbfeSKent Overstreet bch2_pagecache_block_get(&inode->ei_pagecache_lock); 19517edcfbfeSKent Overstreet 19527edcfbfeSKent Overstreet extending = req->ki_pos + iter->count > inode->v.i_size; 19537edcfbfeSKent Overstreet if (!extending) { 19547edcfbfeSKent Overstreet inode_unlock(&inode->v); 19557edcfbfeSKent Overstreet locked = false; 19567edcfbfeSKent Overstreet } 19571c6fdbd8SKent Overstreet 19581c6fdbd8SKent Overstreet bio = bio_alloc_bioset(NULL, 19591c6fdbd8SKent Overstreet iov_iter_npages(iter, BIO_MAX_VECS), 19601c6fdbd8SKent Overstreet REQ_OP_WRITE, 19611c6fdbd8SKent Overstreet GFP_KERNEL, 19621c6fdbd8SKent Overstreet &c->dio_write_bioset); 19639a3df993SKent Overstreet dio = container_of(bio, struct dio_write, op.wbio.bio); 1964f8f30863SKent Overstreet init_completion(&dio->done); 19651c6fdbd8SKent Overstreet dio->req = req; 1966ed484030SKent Overstreet dio->mm = current->mm; 19671c6fdbd8SKent Overstreet dio->loop = false; 19687edcfbfeSKent Overstreet dio->sync = is_sync_kiocb(req) || extending; 19691c6fdbd8SKent Overstreet dio->free_iov = false; 19701c6fdbd8SKent Overstreet dio->quota_res.sectors = 0; 1971042a1f26SKent Overstreet dio->written = 0; 19721c6fdbd8SKent Overstreet dio->iter = *iter; 19739a3df993SKent Overstreet 19741c6fdbd8SKent Overstreet ret = bch2_quota_reservation_add(c, inode, &dio->quota_res, 19751c6fdbd8SKent Overstreet iter->count >> 9, true); 19761c6fdbd8SKent Overstreet if (unlikely(ret)) 19777edcfbfeSKent Overstreet goto err_put_bio; 19781c6fdbd8SKent Overstreet 1979a023127aSKent Overstreet if (unlikely(mapping->nrpages)) { 198054847d25SKent Overstreet ret = write_invalidate_inode_pages_range(mapping, 198154847d25SKent Overstreet req->ki_pos, 198254847d25SKent Overstreet req->ki_pos + iter->count - 1); 198354847d25SKent Overstreet if (unlikely(ret)) 198454847d25SKent Overstreet goto err_put_bio; 1985a023127aSKent Overstreet } 198654847d25SKent Overstreet 19877edcfbfeSKent Overstreet ret = bch2_dio_write_loop(dio); 19881c6fdbd8SKent Overstreet err: 19897edcfbfeSKent Overstreet if (locked) 19907edcfbfeSKent Overstreet inode_unlock(&inode->v); 19917edcfbfeSKent Overstreet return ret; 19927edcfbfeSKent Overstreet err_put_bio: 19937edcfbfeSKent Overstreet bch2_pagecache_block_put(&inode->ei_pagecache_lock); 19941c6fdbd8SKent Overstreet bch2_quota_reservation_put(c, inode, &dio->quota_res); 19951c6fdbd8SKent Overstreet bio_put(bio); 19967edcfbfeSKent Overstreet inode_dio_end(&inode->v); 19977edcfbfeSKent Overstreet goto err; 19981c6fdbd8SKent Overstreet } 19991c6fdbd8SKent Overstreet 20007edcfbfeSKent Overstreet ssize_t bch2_write_iter(struct kiocb *iocb, struct iov_iter *from) 20011c6fdbd8SKent Overstreet { 20021c6fdbd8SKent Overstreet struct file *file = iocb->ki_filp; 20037edcfbfeSKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 20041c6fdbd8SKent Overstreet ssize_t ret; 20051c6fdbd8SKent Overstreet 20061c6fdbd8SKent Overstreet if (iocb->ki_flags & IOCB_DIRECT) 20071c6fdbd8SKent Overstreet return bch2_direct_write(iocb, from); 20081c6fdbd8SKent Overstreet 20097edcfbfeSKent Overstreet inode_lock(&inode->v); 20107edcfbfeSKent Overstreet 20117edcfbfeSKent Overstreet ret = generic_write_checks(iocb, from); 20127edcfbfeSKent Overstreet if (ret <= 0) 20137edcfbfeSKent Overstreet goto unlock; 20147edcfbfeSKent Overstreet 20151c6fdbd8SKent Overstreet ret = file_remove_privs(file); 20161c6fdbd8SKent Overstreet if (ret) 20177edcfbfeSKent Overstreet goto unlock; 20181c6fdbd8SKent Overstreet 20191c6fdbd8SKent Overstreet ret = file_update_time(file); 20201c6fdbd8SKent Overstreet if (ret) 20217edcfbfeSKent Overstreet goto unlock; 20221c6fdbd8SKent Overstreet 20237edcfbfeSKent Overstreet ret = bch2_buffered_write(iocb, from); 20241c6fdbd8SKent Overstreet if (likely(ret > 0)) 20251c6fdbd8SKent Overstreet iocb->ki_pos += ret; 20267edcfbfeSKent Overstreet unlock: 20271c6fdbd8SKent Overstreet inode_unlock(&inode->v); 20281c6fdbd8SKent Overstreet 20297edcfbfeSKent Overstreet if (ret > 0) 20301c6fdbd8SKent Overstreet ret = generic_write_sync(iocb, ret); 20311c6fdbd8SKent Overstreet 20321c6fdbd8SKent Overstreet return ret; 20331c6fdbd8SKent Overstreet } 20341c6fdbd8SKent Overstreet 20351c6fdbd8SKent Overstreet /* fsync: */ 20361c6fdbd8SKent Overstreet 20371c6fdbd8SKent Overstreet int bch2_fsync(struct file *file, loff_t start, loff_t end, int datasync) 20381c6fdbd8SKent Overstreet { 20391c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 20401c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 2041bb1b3658SKent Overstreet int ret, ret2; 20421c6fdbd8SKent Overstreet 20431c6fdbd8SKent Overstreet ret = file_write_and_wait_range(file, start, end); 20441c6fdbd8SKent Overstreet if (ret) 20451c6fdbd8SKent Overstreet return ret; 20461c6fdbd8SKent Overstreet 20471c6fdbd8SKent Overstreet if (datasync && !(inode->v.i_state & I_DIRTY_DATASYNC)) 20481c6fdbd8SKent Overstreet goto out; 20491c6fdbd8SKent Overstreet 20501c6fdbd8SKent Overstreet ret = sync_inode_metadata(&inode->v, 1); 20511c6fdbd8SKent Overstreet if (ret) 20521c6fdbd8SKent Overstreet return ret; 20531c6fdbd8SKent Overstreet out: 205475812e70SKent Overstreet if (!c->opts.journal_flush_disabled) 205575812e70SKent Overstreet ret = bch2_journal_flush_seq(&c->journal, 205675812e70SKent Overstreet inode->ei_journal_seq); 2057bb1b3658SKent Overstreet ret2 = file_check_and_advance_wb_err(file); 2058bb1b3658SKent Overstreet 2059bb1b3658SKent Overstreet return ret ?: ret2; 20601c6fdbd8SKent Overstreet } 20611c6fdbd8SKent Overstreet 20621c6fdbd8SKent Overstreet /* truncate: */ 20631c6fdbd8SKent Overstreet 20641c6fdbd8SKent Overstreet static inline int range_has_data(struct bch_fs *c, 20651c6fdbd8SKent Overstreet struct bpos start, 20661c6fdbd8SKent Overstreet struct bpos end) 20671c6fdbd8SKent Overstreet { 2068424eb881SKent Overstreet struct btree_trans trans; 2069424eb881SKent Overstreet struct btree_iter *iter; 20701c6fdbd8SKent Overstreet struct bkey_s_c k; 20711c6fdbd8SKent Overstreet int ret = 0; 20721c6fdbd8SKent Overstreet 207320bceecbSKent Overstreet bch2_trans_init(&trans, c, 0, 0); 2074424eb881SKent Overstreet 207594f651e2SKent Overstreet for_each_btree_key(&trans, iter, BTREE_ID_EXTENTS, start, 0, k, ret) { 20761c6fdbd8SKent Overstreet if (bkey_cmp(bkey_start_pos(k.k), end) >= 0) 20771c6fdbd8SKent Overstreet break; 20781c6fdbd8SKent Overstreet 20791c6fdbd8SKent Overstreet if (bkey_extent_is_data(k.k)) { 20801c6fdbd8SKent Overstreet ret = 1; 20811c6fdbd8SKent Overstreet break; 20821c6fdbd8SKent Overstreet } 20831c6fdbd8SKent Overstreet } 20841c6fdbd8SKent Overstreet 2085424eb881SKent Overstreet return bch2_trans_exit(&trans) ?: ret; 20861c6fdbd8SKent Overstreet } 20871c6fdbd8SKent Overstreet 20881c6fdbd8SKent Overstreet static int __bch2_truncate_page(struct bch_inode_info *inode, 20891c6fdbd8SKent Overstreet pgoff_t index, loff_t start, loff_t end) 20901c6fdbd8SKent Overstreet { 20911c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 20921c6fdbd8SKent Overstreet struct address_space *mapping = inode->v.i_mapping; 2093a99b1cafSKent Overstreet struct bch_page_state *s; 20941c6fdbd8SKent Overstreet unsigned start_offset = start & (PAGE_SIZE - 1); 20951c6fdbd8SKent Overstreet unsigned end_offset = ((end - 1) & (PAGE_SIZE - 1)) + 1; 2096a99b1cafSKent Overstreet unsigned i; 20971c6fdbd8SKent Overstreet struct page *page; 20981c6fdbd8SKent Overstreet int ret = 0; 20991c6fdbd8SKent Overstreet 21001c6fdbd8SKent Overstreet /* Page boundary? Nothing to do */ 21011c6fdbd8SKent Overstreet if (!((index == start >> PAGE_SHIFT && start_offset) || 21021c6fdbd8SKent Overstreet (index == end >> PAGE_SHIFT && end_offset != PAGE_SIZE))) 21031c6fdbd8SKent Overstreet return 0; 21041c6fdbd8SKent Overstreet 21051c6fdbd8SKent Overstreet /* Above i_size? */ 21061c6fdbd8SKent Overstreet if (index << PAGE_SHIFT >= inode->v.i_size) 21071c6fdbd8SKent Overstreet return 0; 21081c6fdbd8SKent Overstreet 21091c6fdbd8SKent Overstreet page = find_lock_page(mapping, index); 21101c6fdbd8SKent Overstreet if (!page) { 21111c6fdbd8SKent Overstreet /* 21121c6fdbd8SKent Overstreet * XXX: we're doing two index lookups when we end up reading the 21131c6fdbd8SKent Overstreet * page 21141c6fdbd8SKent Overstreet */ 21151c6fdbd8SKent Overstreet ret = range_has_data(c, 21161c6fdbd8SKent Overstreet POS(inode->v.i_ino, index << PAGE_SECTOR_SHIFT), 21171c6fdbd8SKent Overstreet POS(inode->v.i_ino, (index + 1) << PAGE_SECTOR_SHIFT)); 21181c6fdbd8SKent Overstreet if (ret <= 0) 21191c6fdbd8SKent Overstreet return ret; 21201c6fdbd8SKent Overstreet 21211c6fdbd8SKent Overstreet page = find_or_create_page(mapping, index, GFP_KERNEL); 21221c6fdbd8SKent Overstreet if (unlikely(!page)) { 21231c6fdbd8SKent Overstreet ret = -ENOMEM; 21241c6fdbd8SKent Overstreet goto out; 21251c6fdbd8SKent Overstreet } 21261c6fdbd8SKent Overstreet } 21271c6fdbd8SKent Overstreet 2128a99b1cafSKent Overstreet s = bch2_page_state_create(page, 0); 2129a99b1cafSKent Overstreet if (!s) { 2130a99b1cafSKent Overstreet ret = -ENOMEM; 2131a99b1cafSKent Overstreet goto unlock; 2132a99b1cafSKent Overstreet } 2133a99b1cafSKent Overstreet 21341c6fdbd8SKent Overstreet if (!PageUptodate(page)) { 21351c6fdbd8SKent Overstreet ret = bch2_read_single_page(page, mapping); 21361c6fdbd8SKent Overstreet if (ret) 21371c6fdbd8SKent Overstreet goto unlock; 21381c6fdbd8SKent Overstreet } 21391c6fdbd8SKent Overstreet 2140a99b1cafSKent Overstreet if (index != start >> PAGE_SHIFT) 2141a99b1cafSKent Overstreet start_offset = 0; 2142a99b1cafSKent Overstreet if (index != end >> PAGE_SHIFT) 2143a99b1cafSKent Overstreet end_offset = PAGE_SIZE; 2144a99b1cafSKent Overstreet 2145a99b1cafSKent Overstreet for (i = round_up(start_offset, block_bytes(c)) >> 9; 2146a99b1cafSKent Overstreet i < round_down(end_offset, block_bytes(c)) >> 9; 2147a99b1cafSKent Overstreet i++) { 2148a99b1cafSKent Overstreet s->s[i].nr_replicas = 0; 2149a99b1cafSKent Overstreet s->s[i].state = SECTOR_UNALLOCATED; 2150a99b1cafSKent Overstreet } 2151a99b1cafSKent Overstreet 2152a99b1cafSKent Overstreet zero_user_segment(page, start_offset, end_offset); 2153a99b1cafSKent Overstreet 21541c6fdbd8SKent Overstreet /* 21551c6fdbd8SKent Overstreet * Bit of a hack - we don't want truncate to fail due to -ENOSPC. 21561c6fdbd8SKent Overstreet * 21571c6fdbd8SKent Overstreet * XXX: because we aren't currently tracking whether the page has actual 21581c6fdbd8SKent Overstreet * data in it (vs. just 0s, or only partially written) this wrong. ick. 21591c6fdbd8SKent Overstreet */ 2160d1542e03SKent Overstreet ret = bch2_get_page_disk_reservation(c, inode, page, false); 21611c6fdbd8SKent Overstreet BUG_ON(ret); 21621c6fdbd8SKent Overstreet 2163d1542e03SKent Overstreet filemap_dirty_folio(mapping, page_folio(page)); 21641c6fdbd8SKent Overstreet unlock: 21651c6fdbd8SKent Overstreet unlock_page(page); 21661c6fdbd8SKent Overstreet put_page(page); 21671c6fdbd8SKent Overstreet out: 21681c6fdbd8SKent Overstreet return ret; 21691c6fdbd8SKent Overstreet } 21701c6fdbd8SKent Overstreet 21711c6fdbd8SKent Overstreet static int bch2_truncate_page(struct bch_inode_info *inode, loff_t from) 21721c6fdbd8SKent Overstreet { 21731c6fdbd8SKent Overstreet return __bch2_truncate_page(inode, from >> PAGE_SHIFT, 2174a99b1cafSKent Overstreet from, round_up(from, PAGE_SIZE)); 21751c6fdbd8SKent Overstreet } 21761c6fdbd8SKent Overstreet 2177e0541a93SKent Overstreet static int bch2_extend(struct bch_inode_info *inode, 2178e0541a93SKent Overstreet struct bch_inode_unpacked *inode_u, 2179e0541a93SKent Overstreet struct iattr *iattr) 21801c6fdbd8SKent Overstreet { 21811c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 21821c6fdbd8SKent Overstreet struct address_space *mapping = inode->v.i_mapping; 21831c6fdbd8SKent Overstreet int ret; 21841c6fdbd8SKent Overstreet 2185e0541a93SKent Overstreet /* 2186e0541a93SKent Overstreet * sync appends: 21872925fc49SKent Overstreet * 21882925fc49SKent Overstreet * this has to be done _before_ extending i_size: 2189e0541a93SKent Overstreet */ 2190e0541a93SKent Overstreet ret = filemap_write_and_wait_range(mapping, inode_u->bi_size, S64_MAX); 21911c6fdbd8SKent Overstreet if (ret) 21921c6fdbd8SKent Overstreet return ret; 21931c6fdbd8SKent Overstreet 21941c6fdbd8SKent Overstreet truncate_setsize(&inode->v, iattr->ia_size); 21951c6fdbd8SKent Overstreet /* ATTR_MODE will never be set here, ns argument isn't needed: */ 21961c6fdbd8SKent Overstreet setattr_copy(NULL, &inode->v, iattr); 21971c6fdbd8SKent Overstreet 21981c6fdbd8SKent Overstreet mutex_lock(&inode->ei_update_lock); 21992ea90048SKent Overstreet ret = bch2_write_inode_size(c, inode, inode->v.i_size, 22002ea90048SKent Overstreet ATTR_MTIME|ATTR_CTIME); 22011c6fdbd8SKent Overstreet mutex_unlock(&inode->ei_update_lock); 22021c6fdbd8SKent Overstreet 22031c6fdbd8SKent Overstreet return ret; 22041c6fdbd8SKent Overstreet } 22051c6fdbd8SKent Overstreet 220654e2264eSKent Overstreet static int bch2_truncate_finish_fn(struct bch_inode_info *inode, 220754e2264eSKent Overstreet struct bch_inode_unpacked *bi, 220854e2264eSKent Overstreet void *p) 220954e2264eSKent Overstreet { 221054e2264eSKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 221154e2264eSKent Overstreet 221254e2264eSKent Overstreet bi->bi_flags &= ~BCH_INODE_I_SIZE_DIRTY; 221354e2264eSKent Overstreet bi->bi_mtime = bi->bi_ctime = bch2_current_time(c); 221454e2264eSKent Overstreet return 0; 221554e2264eSKent Overstreet } 221654e2264eSKent Overstreet 221754e2264eSKent Overstreet static int bch2_truncate_start_fn(struct bch_inode_info *inode, 221854e2264eSKent Overstreet struct bch_inode_unpacked *bi, void *p) 221954e2264eSKent Overstreet { 222054e2264eSKent Overstreet u64 *new_i_size = p; 222154e2264eSKent Overstreet 222254e2264eSKent Overstreet bi->bi_flags |= BCH_INODE_I_SIZE_DIRTY; 222354e2264eSKent Overstreet bi->bi_size = *new_i_size; 222454e2264eSKent Overstreet return 0; 222554e2264eSKent Overstreet } 222654e2264eSKent Overstreet 22271c6fdbd8SKent Overstreet int bch2_truncate(struct bch_inode_info *inode, struct iattr *iattr) 22281c6fdbd8SKent Overstreet { 22291c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 22301c6fdbd8SKent Overstreet struct address_space *mapping = inode->v.i_mapping; 2231e0541a93SKent Overstreet struct bch_inode_unpacked inode_u; 2232e0541a93SKent Overstreet struct btree_trans trans; 2233e0541a93SKent Overstreet struct btree_iter *iter; 223454e2264eSKent Overstreet u64 new_i_size = iattr->ia_size; 22352e87eae1SKent Overstreet s64 i_sectors_delta = 0; 22361c6fdbd8SKent Overstreet int ret = 0; 22371c6fdbd8SKent Overstreet 22381c6fdbd8SKent Overstreet inode_dio_wait(&inode->v); 22391c6fdbd8SKent Overstreet bch2_pagecache_block_get(&inode->ei_pagecache_lock); 22401c6fdbd8SKent Overstreet 2241e0541a93SKent Overstreet /* 2242e0541a93SKent Overstreet * fetch current on disk i_size: inode is locked, i_size can only 2243e0541a93SKent Overstreet * increase underneath us: 2244e0541a93SKent Overstreet */ 2245e0541a93SKent Overstreet bch2_trans_init(&trans, c, 0, 0); 2246e0541a93SKent Overstreet iter = bch2_inode_peek(&trans, &inode_u, inode->v.i_ino, 0); 2247e0541a93SKent Overstreet ret = PTR_ERR_OR_ZERO(iter); 2248e0541a93SKent Overstreet bch2_trans_exit(&trans); 22491c6fdbd8SKent Overstreet 2250e0541a93SKent Overstreet if (ret) 2251e0541a93SKent Overstreet goto err; 22521c6fdbd8SKent Overstreet 2253c45d473dSKent Overstreet /* 2254c45d473dSKent Overstreet * check this before next assertion; on filesystem error our normal 2255c45d473dSKent Overstreet * invariants are a bit broken (truncate has to truncate the page cache 2256c45d473dSKent Overstreet * before the inode). 2257c45d473dSKent Overstreet */ 2258c45d473dSKent Overstreet ret = bch2_journal_error(&c->journal); 2259c45d473dSKent Overstreet if (ret) 2260c45d473dSKent Overstreet goto err; 2261c45d473dSKent Overstreet 2262e0541a93SKent Overstreet BUG_ON(inode->v.i_size < inode_u.bi_size); 2263e0541a93SKent Overstreet 2264e0541a93SKent Overstreet if (iattr->ia_size > inode->v.i_size) { 2265e0541a93SKent Overstreet ret = bch2_extend(inode, &inode_u, iattr); 226654e2264eSKent Overstreet goto err; 22671c6fdbd8SKent Overstreet } 22681c6fdbd8SKent Overstreet 22691c6fdbd8SKent Overstreet ret = bch2_truncate_page(inode, iattr->ia_size); 22701c6fdbd8SKent Overstreet if (unlikely(ret)) 227154e2264eSKent Overstreet goto err; 22721c6fdbd8SKent Overstreet 22736cc3535dSKent Overstreet /* 22746cc3535dSKent Overstreet * When extending, we're going to write the new i_size to disk 22756cc3535dSKent Overstreet * immediately so we need to flush anything above the current on disk 22766cc3535dSKent Overstreet * i_size first: 22776cc3535dSKent Overstreet * 22786cc3535dSKent Overstreet * Also, when extending we need to flush the page that i_size currently 22796cc3535dSKent Overstreet * straddles - if it's mapped to userspace, we need to ensure that 22806cc3535dSKent Overstreet * userspace has to redirty it and call .mkwrite -> set_page_dirty 22816cc3535dSKent Overstreet * again to allocate the part of the page that was extended. 22826cc3535dSKent Overstreet */ 2283e0541a93SKent Overstreet if (iattr->ia_size > inode_u.bi_size) 22841c6fdbd8SKent Overstreet ret = filemap_write_and_wait_range(mapping, 2285e0541a93SKent Overstreet inode_u.bi_size, 22861c6fdbd8SKent Overstreet iattr->ia_size - 1); 22871c6fdbd8SKent Overstreet else if (iattr->ia_size & (PAGE_SIZE - 1)) 22881c6fdbd8SKent Overstreet ret = filemap_write_and_wait_range(mapping, 22891c6fdbd8SKent Overstreet round_down(iattr->ia_size, PAGE_SIZE), 22901c6fdbd8SKent Overstreet iattr->ia_size - 1); 22911c6fdbd8SKent Overstreet if (ret) 229254e2264eSKent Overstreet goto err; 22931c6fdbd8SKent Overstreet 229454e2264eSKent Overstreet mutex_lock(&inode->ei_update_lock); 229554e2264eSKent Overstreet ret = bch2_write_inode(c, inode, bch2_truncate_start_fn, 229654e2264eSKent Overstreet &new_i_size, 0); 229754e2264eSKent Overstreet mutex_unlock(&inode->ei_update_lock); 22981c6fdbd8SKent Overstreet 22991c6fdbd8SKent Overstreet if (unlikely(ret)) 230054e2264eSKent Overstreet goto err; 23011c6fdbd8SKent Overstreet 23021c6fdbd8SKent Overstreet truncate_setsize(&inode->v, iattr->ia_size); 23031c6fdbd8SKent Overstreet 23042e87eae1SKent Overstreet ret = bch2_fpunch(c, inode->v.i_ino, 2305a99b1cafSKent Overstreet round_up(iattr->ia_size, block_bytes(c)) >> 9, 23062e87eae1SKent Overstreet U64_MAX, &inode->ei_journal_seq, &i_sectors_delta); 23072e87eae1SKent Overstreet i_sectors_acct(c, inode, NULL, i_sectors_delta); 23082e87eae1SKent Overstreet 23091c6fdbd8SKent Overstreet if (unlikely(ret)) 231054e2264eSKent Overstreet goto err; 23111c6fdbd8SKent Overstreet 23121c6fdbd8SKent Overstreet /* ATTR_MODE will never be set here, ns argument isn't needed: */ 23131c6fdbd8SKent Overstreet setattr_copy(NULL, &inode->v, iattr); 231454e2264eSKent Overstreet 231554e2264eSKent Overstreet mutex_lock(&inode->ei_update_lock); 231654e2264eSKent Overstreet ret = bch2_write_inode(c, inode, bch2_truncate_finish_fn, NULL, 231754e2264eSKent Overstreet ATTR_MTIME|ATTR_CTIME); 231854e2264eSKent Overstreet mutex_unlock(&inode->ei_update_lock); 231954e2264eSKent Overstreet err: 23201c6fdbd8SKent Overstreet bch2_pagecache_block_put(&inode->ei_pagecache_lock); 23211c6fdbd8SKent Overstreet return ret; 23221c6fdbd8SKent Overstreet } 23231c6fdbd8SKent Overstreet 23241c6fdbd8SKent Overstreet /* fallocate: */ 23251c6fdbd8SKent Overstreet 23262e87eae1SKent Overstreet static long bchfs_fpunch(struct bch_inode_info *inode, loff_t offset, loff_t len) 23271c6fdbd8SKent Overstreet { 23281c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 2329a99b1cafSKent Overstreet u64 discard_start = round_up(offset, block_bytes(c)) >> 9; 2330a99b1cafSKent Overstreet u64 discard_end = round_down(offset + len, block_bytes(c)) >> 9; 23311c6fdbd8SKent Overstreet int ret = 0; 23321c6fdbd8SKent Overstreet 23331c6fdbd8SKent Overstreet inode_lock(&inode->v); 23341c6fdbd8SKent Overstreet inode_dio_wait(&inode->v); 23351c6fdbd8SKent Overstreet bch2_pagecache_block_get(&inode->ei_pagecache_lock); 23361c6fdbd8SKent Overstreet 23371c6fdbd8SKent Overstreet ret = __bch2_truncate_page(inode, 23381c6fdbd8SKent Overstreet offset >> PAGE_SHIFT, 23391c6fdbd8SKent Overstreet offset, offset + len); 23401c6fdbd8SKent Overstreet if (unlikely(ret)) 23411c6fdbd8SKent Overstreet goto err; 23421c6fdbd8SKent Overstreet 23431c6fdbd8SKent Overstreet if (offset >> PAGE_SHIFT != 23441c6fdbd8SKent Overstreet (offset + len) >> PAGE_SHIFT) { 23451c6fdbd8SKent Overstreet ret = __bch2_truncate_page(inode, 23461c6fdbd8SKent Overstreet (offset + len) >> PAGE_SHIFT, 23471c6fdbd8SKent Overstreet offset, offset + len); 23481c6fdbd8SKent Overstreet if (unlikely(ret)) 23491c6fdbd8SKent Overstreet goto err; 23501c6fdbd8SKent Overstreet } 23511c6fdbd8SKent Overstreet 23521c6fdbd8SKent Overstreet truncate_pagecache_range(&inode->v, offset, offset + len - 1); 23531c6fdbd8SKent Overstreet 23542e87eae1SKent Overstreet if (discard_start < discard_end) { 23552e87eae1SKent Overstreet s64 i_sectors_delta = 0; 23562e87eae1SKent Overstreet 23572e87eae1SKent Overstreet ret = bch2_fpunch(c, inode->v.i_ino, 23582e87eae1SKent Overstreet discard_start, discard_end, 23592e87eae1SKent Overstreet &inode->ei_journal_seq, 23602e87eae1SKent Overstreet &i_sectors_delta); 23612e87eae1SKent Overstreet i_sectors_acct(c, inode, NULL, i_sectors_delta); 23622e87eae1SKent Overstreet } 23631c6fdbd8SKent Overstreet err: 23641c6fdbd8SKent Overstreet bch2_pagecache_block_put(&inode->ei_pagecache_lock); 23651c6fdbd8SKent Overstreet inode_unlock(&inode->v); 23661c6fdbd8SKent Overstreet 23671c6fdbd8SKent Overstreet return ret; 23681c6fdbd8SKent Overstreet } 23691c6fdbd8SKent Overstreet 23702e87eae1SKent Overstreet static long bchfs_fcollapse_finsert(struct bch_inode_info *inode, 23715f786787SKent Overstreet loff_t offset, loff_t len, 23725f786787SKent Overstreet bool insert) 23731c6fdbd8SKent Overstreet { 23741c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 23751c6fdbd8SKent Overstreet struct address_space *mapping = inode->v.i_mapping; 237635189e09SKent Overstreet struct bkey_on_stack copy; 2377d69f41d6SKent Overstreet struct btree_trans trans; 237824326cd1SKent Overstreet struct btree_iter *src, *dst; 23795f786787SKent Overstreet loff_t shift, new_size; 23805f786787SKent Overstreet u64 src_start; 23811c6fdbd8SKent Overstreet int ret; 23821c6fdbd8SKent Overstreet 23831c6fdbd8SKent Overstreet if ((offset | len) & (block_bytes(c) - 1)) 23841c6fdbd8SKent Overstreet return -EINVAL; 23851c6fdbd8SKent Overstreet 238635189e09SKent Overstreet bkey_on_stack_init(©); 238720bceecbSKent Overstreet bch2_trans_init(&trans, c, BTREE_ITER_MAX, 256); 23881c6fdbd8SKent Overstreet 23891c6fdbd8SKent Overstreet /* 23901c6fdbd8SKent Overstreet * We need i_mutex to keep the page cache consistent with the extents 23911c6fdbd8SKent Overstreet * btree, and the btree consistent with i_size - we don't need outside 23921c6fdbd8SKent Overstreet * locking for the extents btree itself, because we're using linked 23931c6fdbd8SKent Overstreet * iterators 23941c6fdbd8SKent Overstreet */ 23951c6fdbd8SKent Overstreet inode_lock(&inode->v); 23961c6fdbd8SKent Overstreet inode_dio_wait(&inode->v); 23971c6fdbd8SKent Overstreet bch2_pagecache_block_get(&inode->ei_pagecache_lock); 23981c6fdbd8SKent Overstreet 23995f786787SKent Overstreet if (insert) { 24005f786787SKent Overstreet ret = -EFBIG; 24015f786787SKent Overstreet if (inode->v.i_sb->s_maxbytes - inode->v.i_size < len) 24025f786787SKent Overstreet goto err; 24035f786787SKent Overstreet 24045f786787SKent Overstreet ret = -EINVAL; 24055f786787SKent Overstreet if (offset >= inode->v.i_size) 24065f786787SKent Overstreet goto err; 24075f786787SKent Overstreet 24085f786787SKent Overstreet src_start = U64_MAX; 24095f786787SKent Overstreet shift = len; 24105f786787SKent Overstreet } else { 24111c6fdbd8SKent Overstreet ret = -EINVAL; 24121c6fdbd8SKent Overstreet if (offset + len >= inode->v.i_size) 24131c6fdbd8SKent Overstreet goto err; 24141c6fdbd8SKent Overstreet 24155f786787SKent Overstreet src_start = offset + len; 24165f786787SKent Overstreet shift = -len; 24175f786787SKent Overstreet } 24181c6fdbd8SKent Overstreet 24195f786787SKent Overstreet new_size = inode->v.i_size + shift; 24201c6fdbd8SKent Overstreet 24211c6fdbd8SKent Overstreet ret = write_invalidate_inode_pages_range(mapping, offset, LLONG_MAX); 24221c6fdbd8SKent Overstreet if (ret) 24231c6fdbd8SKent Overstreet goto err; 24241c6fdbd8SKent Overstreet 24255f786787SKent Overstreet if (insert) { 24265f786787SKent Overstreet i_size_write(&inode->v, new_size); 24275f786787SKent Overstreet mutex_lock(&inode->ei_update_lock); 24285f786787SKent Overstreet ret = bch2_write_inode_size(c, inode, new_size, 24295f786787SKent Overstreet ATTR_MTIME|ATTR_CTIME); 24305f786787SKent Overstreet mutex_unlock(&inode->ei_update_lock); 24315f786787SKent Overstreet } else { 24322e87eae1SKent Overstreet s64 i_sectors_delta = 0; 24332e87eae1SKent Overstreet 24342e87eae1SKent Overstreet ret = bch2_fpunch(c, inode->v.i_ino, 24352e87eae1SKent Overstreet offset >> 9, (offset + len) >> 9, 24362e87eae1SKent Overstreet &inode->ei_journal_seq, 24372e87eae1SKent Overstreet &i_sectors_delta); 24382e87eae1SKent Overstreet i_sectors_acct(c, inode, NULL, i_sectors_delta); 24392e87eae1SKent Overstreet 244063095894SKent Overstreet if (ret) 244163095894SKent Overstreet goto err; 24425f786787SKent Overstreet } 24438ef231bdSKent Overstreet 24448ef231bdSKent Overstreet src = bch2_trans_get_iter(&trans, BTREE_ID_EXTENTS, 24455f786787SKent Overstreet POS(inode->v.i_ino, src_start >> 9), 244663095894SKent Overstreet BTREE_ITER_INTENT); 24478ef231bdSKent Overstreet BUG_ON(IS_ERR_OR_NULL(src)); 24481c6fdbd8SKent Overstreet 24495f786787SKent Overstreet dst = bch2_trans_copy_iter(&trans, src); 24505f786787SKent Overstreet BUG_ON(IS_ERR_OR_NULL(dst)); 24515f786787SKent Overstreet 245263095894SKent Overstreet while (1) { 245363095894SKent Overstreet struct disk_reservation disk_res = 245463095894SKent Overstreet bch2_disk_reservation_init(c, 0); 245563095894SKent Overstreet struct bkey_i delete; 245663095894SKent Overstreet struct bkey_s_c k; 245763095894SKent Overstreet struct bpos next_pos; 24585f786787SKent Overstreet struct bpos move_pos = POS(inode->v.i_ino, offset >> 9); 24595f786787SKent Overstreet struct bpos atomic_end; 24602d594dfbSKent Overstreet unsigned trigger_flags = 0; 246163095894SKent Overstreet 24625f786787SKent Overstreet k = insert 24635f786787SKent Overstreet ? bch2_btree_iter_peek_prev(src) 24645f786787SKent Overstreet : bch2_btree_iter_peek(src); 246563095894SKent Overstreet if ((ret = bkey_err(k))) 246663095894SKent Overstreet goto bkey_err; 246763095894SKent Overstreet 246863095894SKent Overstreet if (!k.k || k.k->p.inode != inode->v.i_ino) 246963095894SKent Overstreet break; 247063095894SKent Overstreet 24715f786787SKent Overstreet BUG_ON(bkey_cmp(src->pos, bkey_start_pos(k.k))); 247263095894SKent Overstreet 24735f786787SKent Overstreet if (insert && 24745f786787SKent Overstreet bkey_cmp(k.k->p, POS(inode->v.i_ino, offset >> 9)) <= 0) 24755f786787SKent Overstreet break; 24765f786787SKent Overstreet reassemble: 24775934a0caSKent Overstreet bkey_on_stack_reassemble(©, c, k); 24785f786787SKent Overstreet 24795f786787SKent Overstreet if (insert && 2480283eda57SKent Overstreet bkey_cmp(bkey_start_pos(k.k), move_pos) < 0) 248135189e09SKent Overstreet bch2_cut_front(move_pos, copy.k); 24825f786787SKent Overstreet 248335189e09SKent Overstreet copy.k->k.p.offset += shift >> 9; 248435189e09SKent Overstreet bch2_btree_iter_set_pos(dst, bkey_start_pos(©.k->k)); 24851c6fdbd8SKent Overstreet 248635189e09SKent Overstreet ret = bch2_extent_atomic_end(dst, copy.k, &atomic_end); 24873c7f3b7aSKent Overstreet if (ret) 24883c7f3b7aSKent Overstreet goto bkey_err; 2489e2d9912cSKent Overstreet 249035189e09SKent Overstreet if (bkey_cmp(atomic_end, copy.k->k.p)) { 24915f786787SKent Overstreet if (insert) { 24925f786787SKent Overstreet move_pos = atomic_end; 24935f786787SKent Overstreet move_pos.offset -= shift >> 9; 24945f786787SKent Overstreet goto reassemble; 24955f786787SKent Overstreet } else { 2496085ab693SKent Overstreet bch2_cut_back(atomic_end, copy.k); 24975f786787SKent Overstreet } 24985f786787SKent Overstreet } 24995f786787SKent Overstreet 250063095894SKent Overstreet bkey_init(&delete.k); 2501283eda57SKent Overstreet delete.k.p = copy.k->k.p; 2502283eda57SKent Overstreet delete.k.size = copy.k->k.size; 2503283eda57SKent Overstreet delete.k.p.offset -= shift >> 9; 25041c6fdbd8SKent Overstreet 25055f786787SKent Overstreet next_pos = insert ? bkey_start_pos(&delete.k) : delete.k.p; 250663095894SKent Overstreet 250735189e09SKent Overstreet if (copy.k->k.size == k.k->size) { 250863095894SKent Overstreet /* 250963095894SKent Overstreet * If we're moving the entire extent, we can skip 251063095894SKent Overstreet * running triggers: 251163095894SKent Overstreet */ 25122d594dfbSKent Overstreet trigger_flags |= BTREE_TRIGGER_NORUN; 251363095894SKent Overstreet } else { 251463095894SKent Overstreet /* We might end up splitting compressed extents: */ 251563095894SKent Overstreet unsigned nr_ptrs = 25164de77495SKent Overstreet bch2_bkey_nr_ptrs_allocated(bkey_i_to_s_c(copy.k)); 251763095894SKent Overstreet 251863095894SKent Overstreet ret = bch2_disk_reservation_get(c, &disk_res, 251935189e09SKent Overstreet copy.k->k.size, nr_ptrs, 25201c6fdbd8SKent Overstreet BCH_DISK_RESERVATION_NOFAIL); 25211c6fdbd8SKent Overstreet BUG_ON(ret); 252263095894SKent Overstreet } 25231c6fdbd8SKent Overstreet 2524283eda57SKent Overstreet bch2_btree_iter_set_pos(src, bkey_start_pos(&delete.k)); 2525283eda57SKent Overstreet 252624326cd1SKent Overstreet ret = bch2_trans_update(&trans, src, &delete, trigger_flags) ?: 252724326cd1SKent Overstreet bch2_trans_update(&trans, dst, copy.k, trigger_flags) ?: 252824326cd1SKent Overstreet bch2_trans_commit(&trans, &disk_res, 252963095894SKent Overstreet &inode->ei_journal_seq, 25302d594dfbSKent Overstreet BTREE_INSERT_NOFAIL); 25311c6fdbd8SKent Overstreet bch2_disk_reservation_put(c, &disk_res); 25320f238367SKent Overstreet bkey_err: 253363095894SKent Overstreet if (!ret) 253463095894SKent Overstreet bch2_btree_iter_set_pos(src, next_pos); 253563095894SKent Overstreet 25361c6fdbd8SKent Overstreet if (ret == -EINTR) 25371c6fdbd8SKent Overstreet ret = 0; 25388ef231bdSKent Overstreet if (ret) 25398ef231bdSKent Overstreet goto err; 25401c6fdbd8SKent Overstreet 2541424eb881SKent Overstreet bch2_trans_cond_resched(&trans); 25421c6fdbd8SKent Overstreet } 25438ef231bdSKent Overstreet bch2_trans_unlock(&trans); 25441c6fdbd8SKent Overstreet 25455f786787SKent Overstreet if (!insert) { 25468ef231bdSKent Overstreet i_size_write(&inode->v, new_size); 25478ef231bdSKent Overstreet mutex_lock(&inode->ei_update_lock); 25488ef231bdSKent Overstreet ret = bch2_write_inode_size(c, inode, new_size, 25498ef231bdSKent Overstreet ATTR_MTIME|ATTR_CTIME); 25508ef231bdSKent Overstreet mutex_unlock(&inode->ei_update_lock); 25515f786787SKent Overstreet } 25521c6fdbd8SKent Overstreet err: 25538ef231bdSKent Overstreet bch2_trans_exit(&trans); 255435189e09SKent Overstreet bkey_on_stack_exit(©, c); 25551c6fdbd8SKent Overstreet bch2_pagecache_block_put(&inode->ei_pagecache_lock); 25561c6fdbd8SKent Overstreet inode_unlock(&inode->v); 25571c6fdbd8SKent Overstreet return ret; 25581c6fdbd8SKent Overstreet } 25591c6fdbd8SKent Overstreet 25602e87eae1SKent Overstreet static long bchfs_fallocate(struct bch_inode_info *inode, int mode, 25611c6fdbd8SKent Overstreet loff_t offset, loff_t len) 25621c6fdbd8SKent Overstreet { 25631c6fdbd8SKent Overstreet struct address_space *mapping = inode->v.i_mapping; 25641c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 2565190fa7afSKent Overstreet struct btree_trans trans; 2566190fa7afSKent Overstreet struct btree_iter *iter; 25671c6fdbd8SKent Overstreet struct bpos end_pos; 25681c6fdbd8SKent Overstreet loff_t end = offset + len; 2569a99b1cafSKent Overstreet loff_t block_start = round_down(offset, block_bytes(c)); 2570a99b1cafSKent Overstreet loff_t block_end = round_up(end, block_bytes(c)); 25711c6fdbd8SKent Overstreet unsigned sectors; 25729a3df993SKent Overstreet unsigned replicas = io_opts(c, &inode->ei_inode).data_replicas; 25731c6fdbd8SKent Overstreet int ret; 25741c6fdbd8SKent Overstreet 257520bceecbSKent Overstreet bch2_trans_init(&trans, c, BTREE_ITER_MAX, 0); 25761c6fdbd8SKent Overstreet 25771c6fdbd8SKent Overstreet inode_lock(&inode->v); 25781c6fdbd8SKent Overstreet inode_dio_wait(&inode->v); 25791c6fdbd8SKent Overstreet bch2_pagecache_block_get(&inode->ei_pagecache_lock); 25801c6fdbd8SKent Overstreet 25811c6fdbd8SKent Overstreet if (!(mode & FALLOC_FL_KEEP_SIZE) && end > inode->v.i_size) { 25821c6fdbd8SKent Overstreet ret = inode_newsize_ok(&inode->v, end); 25831c6fdbd8SKent Overstreet if (ret) 25841c6fdbd8SKent Overstreet goto err; 25851c6fdbd8SKent Overstreet } 25861c6fdbd8SKent Overstreet 25871c6fdbd8SKent Overstreet if (mode & FALLOC_FL_ZERO_RANGE) { 25881c6fdbd8SKent Overstreet ret = __bch2_truncate_page(inode, 25891c6fdbd8SKent Overstreet offset >> PAGE_SHIFT, 25901c6fdbd8SKent Overstreet offset, end); 25911c6fdbd8SKent Overstreet 25921c6fdbd8SKent Overstreet if (!ret && 25931c6fdbd8SKent Overstreet offset >> PAGE_SHIFT != end >> PAGE_SHIFT) 25941c6fdbd8SKent Overstreet ret = __bch2_truncate_page(inode, 25951c6fdbd8SKent Overstreet end >> PAGE_SHIFT, 25961c6fdbd8SKent Overstreet offset, end); 25971c6fdbd8SKent Overstreet 25981c6fdbd8SKent Overstreet if (unlikely(ret)) 25991c6fdbd8SKent Overstreet goto err; 26001c6fdbd8SKent Overstreet 26011c6fdbd8SKent Overstreet truncate_pagecache_range(&inode->v, offset, end - 1); 26021c6fdbd8SKent Overstreet } 26031c6fdbd8SKent Overstreet 2604190fa7afSKent Overstreet iter = bch2_trans_get_iter(&trans, BTREE_ID_EXTENTS, 2605190fa7afSKent Overstreet POS(inode->v.i_ino, block_start >> 9), 2606190fa7afSKent Overstreet BTREE_ITER_SLOTS|BTREE_ITER_INTENT); 26071c6fdbd8SKent Overstreet end_pos = POS(inode->v.i_ino, block_end >> 9); 26081c6fdbd8SKent Overstreet 2609190fa7afSKent Overstreet while (bkey_cmp(iter->pos, end_pos) < 0) { 26102e87eae1SKent Overstreet s64 i_sectors_delta = 0; 26111c6fdbd8SKent Overstreet struct disk_reservation disk_res = { 0 }; 2612190fa7afSKent Overstreet struct quota_res quota_res = { 0 }; 26131c6fdbd8SKent Overstreet struct bkey_i_reservation reservation; 26141c6fdbd8SKent Overstreet struct bkey_s_c k; 26151c6fdbd8SKent Overstreet 2616163e885aSKent Overstreet bch2_trans_begin(&trans); 2617a8abd3a7SKent Overstreet 2618190fa7afSKent Overstreet k = bch2_btree_iter_peek_slot(iter); 26190f238367SKent Overstreet if ((ret = bkey_err(k))) 26200f238367SKent Overstreet goto bkey_err; 26211c6fdbd8SKent Overstreet 26221c6fdbd8SKent Overstreet /* already reserved */ 262326609b61SKent Overstreet if (k.k->type == KEY_TYPE_reservation && 26241c6fdbd8SKent Overstreet bkey_s_c_to_reservation(k).v->nr_replicas >= replicas) { 2625190fa7afSKent Overstreet bch2_btree_iter_next_slot(iter); 26261c6fdbd8SKent Overstreet continue; 26271c6fdbd8SKent Overstreet } 26281c6fdbd8SKent Overstreet 2629190fa7afSKent Overstreet if (bkey_extent_is_data(k.k) && 2630190fa7afSKent Overstreet !(mode & FALLOC_FL_ZERO_RANGE)) { 2631190fa7afSKent Overstreet bch2_btree_iter_next_slot(iter); 26321c6fdbd8SKent Overstreet continue; 26331c6fdbd8SKent Overstreet } 26341c6fdbd8SKent Overstreet 26351c6fdbd8SKent Overstreet bkey_reservation_init(&reservation.k_i); 263626609b61SKent Overstreet reservation.k.type = KEY_TYPE_reservation; 26371c6fdbd8SKent Overstreet reservation.k.p = k.k->p; 26381c6fdbd8SKent Overstreet reservation.k.size = k.k->size; 26391c6fdbd8SKent Overstreet 2640190fa7afSKent Overstreet bch2_cut_front(iter->pos, &reservation.k_i); 2641085ab693SKent Overstreet bch2_cut_back(end_pos, &reservation.k_i); 26421c6fdbd8SKent Overstreet 26431c6fdbd8SKent Overstreet sectors = reservation.k.size; 26444de77495SKent Overstreet reservation.v.nr_replicas = bch2_bkey_nr_ptrs_allocated(k); 26451c6fdbd8SKent Overstreet 26461c6fdbd8SKent Overstreet if (!bkey_extent_is_allocation(k.k)) { 26471c6fdbd8SKent Overstreet ret = bch2_quota_reservation_add(c, inode, 2648190fa7afSKent Overstreet "a_res, 26491c6fdbd8SKent Overstreet sectors, true); 26501c6fdbd8SKent Overstreet if (unlikely(ret)) 26510f238367SKent Overstreet goto bkey_err; 26521c6fdbd8SKent Overstreet } 26531c6fdbd8SKent Overstreet 26541c6fdbd8SKent Overstreet if (reservation.v.nr_replicas < replicas || 26554de77495SKent Overstreet bch2_bkey_sectors_compressed(k)) { 26561c6fdbd8SKent Overstreet ret = bch2_disk_reservation_get(c, &disk_res, sectors, 26571c6fdbd8SKent Overstreet replicas, 0); 26581c6fdbd8SKent Overstreet if (unlikely(ret)) 26590f238367SKent Overstreet goto bkey_err; 26601c6fdbd8SKent Overstreet 26611c6fdbd8SKent Overstreet reservation.v.nr_replicas = disk_res.nr_replicas; 26621c6fdbd8SKent Overstreet } 26631c6fdbd8SKent Overstreet 26642e87eae1SKent Overstreet ret = bch2_extent_update(&trans, iter, &reservation.k_i, 26652e87eae1SKent Overstreet &disk_res, &inode->ei_journal_seq, 26662e87eae1SKent Overstreet 0, &i_sectors_delta); 26672e87eae1SKent Overstreet i_sectors_acct(c, inode, "a_res, i_sectors_delta); 26680f238367SKent Overstreet bkey_err: 2669190fa7afSKent Overstreet bch2_quota_reservation_put(c, inode, "a_res); 26701c6fdbd8SKent Overstreet bch2_disk_reservation_put(c, &disk_res); 26711c6fdbd8SKent Overstreet if (ret == -EINTR) 26721c6fdbd8SKent Overstreet ret = 0; 2673190fa7afSKent Overstreet if (ret) 2674190fa7afSKent Overstreet goto err; 26751c6fdbd8SKent Overstreet } 2676e0541a93SKent Overstreet 2677e0541a93SKent Overstreet /* 2678e0541a93SKent Overstreet * Do we need to extend the file? 2679e0541a93SKent Overstreet * 2680e0541a93SKent Overstreet * If we zeroed up to the end of the file, we dropped whatever writes 2681e0541a93SKent Overstreet * were going to write out the current i_size, so we have to extend 2682e0541a93SKent Overstreet * manually even if FL_KEEP_SIZE was set: 2683e0541a93SKent Overstreet */ 2684e0541a93SKent Overstreet if (end >= inode->v.i_size && 2685e0541a93SKent Overstreet (!(mode & FALLOC_FL_KEEP_SIZE) || 2686e0541a93SKent Overstreet (mode & FALLOC_FL_ZERO_RANGE))) { 2687e0541a93SKent Overstreet struct btree_iter *inode_iter; 2688e0541a93SKent Overstreet struct bch_inode_unpacked inode_u; 2689e0541a93SKent Overstreet 2690e0541a93SKent Overstreet do { 2691e0541a93SKent Overstreet bch2_trans_begin(&trans); 2692e0541a93SKent Overstreet inode_iter = bch2_inode_peek(&trans, &inode_u, 2693e0541a93SKent Overstreet inode->v.i_ino, 0); 2694e0541a93SKent Overstreet ret = PTR_ERR_OR_ZERO(inode_iter); 2695e0541a93SKent Overstreet } while (ret == -EINTR); 2696e0541a93SKent Overstreet 2697190fa7afSKent Overstreet bch2_trans_unlock(&trans); 26981c6fdbd8SKent Overstreet 26991c6fdbd8SKent Overstreet if (ret) 27001c6fdbd8SKent Overstreet goto err; 27011c6fdbd8SKent Overstreet 2702e0541a93SKent Overstreet /* 2703e0541a93SKent Overstreet * Sync existing appends before extending i_size, 2704e0541a93SKent Overstreet * as in bch2_extend(): 2705e0541a93SKent Overstreet */ 2706e0541a93SKent Overstreet ret = filemap_write_and_wait_range(mapping, 2707e0541a93SKent Overstreet inode_u.bi_size, S64_MAX); 2708e0541a93SKent Overstreet if (ret) 2709e0541a93SKent Overstreet goto err; 2710e0541a93SKent Overstreet 2711e0541a93SKent Overstreet if (mode & FALLOC_FL_KEEP_SIZE) 2712e0541a93SKent Overstreet end = inode->v.i_size; 2713e0541a93SKent Overstreet else 2714e0541a93SKent Overstreet i_size_write(&inode->v, end); 2715e0541a93SKent Overstreet 27161c6fdbd8SKent Overstreet mutex_lock(&inode->ei_update_lock); 2717e0541a93SKent Overstreet ret = bch2_write_inode_size(c, inode, end, 0); 27181c6fdbd8SKent Overstreet mutex_unlock(&inode->ei_update_lock); 27191c6fdbd8SKent Overstreet } 27201c6fdbd8SKent Overstreet err: 2721190fa7afSKent Overstreet bch2_trans_exit(&trans); 27221c6fdbd8SKent Overstreet bch2_pagecache_block_put(&inode->ei_pagecache_lock); 27231c6fdbd8SKent Overstreet inode_unlock(&inode->v); 27241c6fdbd8SKent Overstreet return ret; 27251c6fdbd8SKent Overstreet } 27261c6fdbd8SKent Overstreet 27271c6fdbd8SKent Overstreet long bch2_fallocate_dispatch(struct file *file, int mode, 27281c6fdbd8SKent Overstreet loff_t offset, loff_t len) 27291c6fdbd8SKent Overstreet { 27301c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 27312a9101a9SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 27322a9101a9SKent Overstreet long ret; 27332a9101a9SKent Overstreet 27342a9101a9SKent Overstreet if (!percpu_ref_tryget(&c->writes)) 27352a9101a9SKent Overstreet return -EROFS; 27361c6fdbd8SKent Overstreet 27371c6fdbd8SKent Overstreet if (!(mode & ~(FALLOC_FL_KEEP_SIZE|FALLOC_FL_ZERO_RANGE))) 27382a9101a9SKent Overstreet ret = bchfs_fallocate(inode, mode, offset, len); 27392a9101a9SKent Overstreet else if (mode == (FALLOC_FL_PUNCH_HOLE|FALLOC_FL_KEEP_SIZE)) 27402a9101a9SKent Overstreet ret = bchfs_fpunch(inode, offset, len); 27412a9101a9SKent Overstreet else if (mode == FALLOC_FL_INSERT_RANGE) 27422a9101a9SKent Overstreet ret = bchfs_fcollapse_finsert(inode, offset, len, true); 27432a9101a9SKent Overstreet else if (mode == FALLOC_FL_COLLAPSE_RANGE) 27442a9101a9SKent Overstreet ret = bchfs_fcollapse_finsert(inode, offset, len, false); 27452a9101a9SKent Overstreet else 27462a9101a9SKent Overstreet ret = -EOPNOTSUPP; 27471c6fdbd8SKent Overstreet 27482a9101a9SKent Overstreet percpu_ref_put(&c->writes); 27491c6fdbd8SKent Overstreet 27502a9101a9SKent Overstreet return ret; 27511c6fdbd8SKent Overstreet } 27521c6fdbd8SKent Overstreet 275376426098SKent Overstreet static void mark_range_unallocated(struct bch_inode_info *inode, 275476426098SKent Overstreet loff_t start, loff_t end) 275576426098SKent Overstreet { 275676426098SKent Overstreet pgoff_t index = start >> PAGE_SHIFT; 275776426098SKent Overstreet pgoff_t end_index = (end - 1) >> PAGE_SHIFT; 275876426098SKent Overstreet struct folio_batch fbatch; 275976426098SKent Overstreet unsigned i, j; 276076426098SKent Overstreet 276176426098SKent Overstreet folio_batch_init(&fbatch); 276276426098SKent Overstreet 276376426098SKent Overstreet while (filemap_get_folios(inode->v.i_mapping, 276476426098SKent Overstreet &index, end_index, &fbatch)) { 276576426098SKent Overstreet for (i = 0; i < folio_batch_count(&fbatch); i++) { 276676426098SKent Overstreet struct folio *folio = fbatch.folios[i]; 276776426098SKent Overstreet struct bch_page_state *s; 276876426098SKent Overstreet 276976426098SKent Overstreet folio_lock(folio); 277076426098SKent Overstreet s = bch2_page_state(&folio->page); 277176426098SKent Overstreet 27723826ee0bSKent Overstreet if (s) { 27733826ee0bSKent Overstreet spin_lock(&s->lock); 277476426098SKent Overstreet for (j = 0; j < PAGE_SECTORS; j++) 277576426098SKent Overstreet s->s[j].nr_replicas = 0; 27763826ee0bSKent Overstreet spin_unlock(&s->lock); 27773826ee0bSKent Overstreet } 277876426098SKent Overstreet 277976426098SKent Overstreet folio_unlock(folio); 278076426098SKent Overstreet } 278176426098SKent Overstreet folio_batch_release(&fbatch); 278276426098SKent Overstreet cond_resched(); 278376426098SKent Overstreet } 278476426098SKent Overstreet } 278576426098SKent Overstreet 278676426098SKent Overstreet loff_t bch2_remap_file_range(struct file *file_src, loff_t pos_src, 278776426098SKent Overstreet struct file *file_dst, loff_t pos_dst, 278876426098SKent Overstreet loff_t len, unsigned remap_flags) 278976426098SKent Overstreet { 279076426098SKent Overstreet struct bch_inode_info *src = file_bch_inode(file_src); 279176426098SKent Overstreet struct bch_inode_info *dst = file_bch_inode(file_dst); 279276426098SKent Overstreet struct bch_fs *c = src->v.i_sb->s_fs_info; 27932e87eae1SKent Overstreet s64 i_sectors_delta = 0; 2794677fc056SKent Overstreet u64 aligned_len; 279576426098SKent Overstreet loff_t ret = 0; 279676426098SKent Overstreet 279736b8372bSKent Overstreet if (!c->opts.reflink) 279836b8372bSKent Overstreet return -EOPNOTSUPP; 279936b8372bSKent Overstreet 280076426098SKent Overstreet if (remap_flags & ~(REMAP_FILE_DEDUP|REMAP_FILE_ADVISORY)) 280176426098SKent Overstreet return -EINVAL; 280276426098SKent Overstreet 280376426098SKent Overstreet if (remap_flags & REMAP_FILE_DEDUP) 280476426098SKent Overstreet return -EOPNOTSUPP; 280576426098SKent Overstreet 280676426098SKent Overstreet if ((pos_src & (block_bytes(c) - 1)) || 280776426098SKent Overstreet (pos_dst & (block_bytes(c) - 1))) 280876426098SKent Overstreet return -EINVAL; 280976426098SKent Overstreet 281076426098SKent Overstreet if (src == dst && 281176426098SKent Overstreet abs(pos_src - pos_dst) < len) 281276426098SKent Overstreet return -EINVAL; 281376426098SKent Overstreet 281476426098SKent Overstreet bch2_lock_inodes(INODE_LOCK|INODE_PAGECACHE_BLOCK, src, dst); 281576426098SKent Overstreet 28162e87eae1SKent Overstreet file_update_time(file_dst); 28172e87eae1SKent Overstreet 281876426098SKent Overstreet inode_dio_wait(&src->v); 281976426098SKent Overstreet inode_dio_wait(&dst->v); 282076426098SKent Overstreet 282176426098SKent Overstreet ret = generic_remap_file_range_prep(file_src, pos_src, 282276426098SKent Overstreet file_dst, pos_dst, 282376426098SKent Overstreet &len, remap_flags); 282476426098SKent Overstreet if (ret < 0 || len == 0) 28252e87eae1SKent Overstreet goto err; 282676426098SKent Overstreet 2827677fc056SKent Overstreet aligned_len = round_up((u64) len, block_bytes(c)); 282876426098SKent Overstreet 282976426098SKent Overstreet ret = write_invalidate_inode_pages_range(dst->v.i_mapping, 2830677fc056SKent Overstreet pos_dst, pos_dst + len - 1); 283176426098SKent Overstreet if (ret) 28322e87eae1SKent Overstreet goto err; 283376426098SKent Overstreet 283476426098SKent Overstreet mark_range_unallocated(src, pos_src, pos_src + aligned_len); 283576426098SKent Overstreet 28362e87eae1SKent Overstreet ret = bch2_remap_range(c, 283776426098SKent Overstreet POS(dst->v.i_ino, pos_dst >> 9), 283876426098SKent Overstreet POS(src->v.i_ino, pos_src >> 9), 283976426098SKent Overstreet aligned_len >> 9, 28402e87eae1SKent Overstreet &dst->ei_journal_seq, 28412e87eae1SKent Overstreet pos_dst + len, &i_sectors_delta); 28422e87eae1SKent Overstreet if (ret < 0) 28432e87eae1SKent Overstreet goto err; 284476426098SKent Overstreet 28452e87eae1SKent Overstreet /* 28462e87eae1SKent Overstreet * due to alignment, we might have remapped slightly more than requsted 28472e87eae1SKent Overstreet */ 2848677fc056SKent Overstreet ret = min((u64) ret << 9, (u64) len); 28492e87eae1SKent Overstreet 28502e87eae1SKent Overstreet /* XXX get a quota reservation */ 28512e87eae1SKent Overstreet i_sectors_acct(c, dst, NULL, i_sectors_delta); 28522e87eae1SKent Overstreet 28532e87eae1SKent Overstreet spin_lock(&dst->v.i_lock); 2854677fc056SKent Overstreet if (pos_dst + ret > dst->v.i_size) 2855677fc056SKent Overstreet i_size_write(&dst->v, pos_dst + ret); 28562e87eae1SKent Overstreet spin_unlock(&dst->v.i_lock); 28572e87eae1SKent Overstreet err: 285876426098SKent Overstreet bch2_unlock_inodes(INODE_LOCK|INODE_PAGECACHE_BLOCK, src, dst); 285976426098SKent Overstreet 286076426098SKent Overstreet return ret; 286176426098SKent Overstreet } 286276426098SKent Overstreet 28631c6fdbd8SKent Overstreet /* fseek: */ 28641c6fdbd8SKent Overstreet 2865543ef2ebSKent Overstreet static int folio_data_offset(struct folio *folio, unsigned offset) 28661c6fdbd8SKent Overstreet { 2867f57a6a5dSKent Overstreet struct bch_page_state *s = bch2_page_state(&folio->page); 2868f57a6a5dSKent Overstreet unsigned i; 2869f81b648dSKent Overstreet 2870543ef2ebSKent Overstreet if (s) 2871543ef2ebSKent Overstreet for (i = offset >> 9; i < PAGE_SECTORS; i++) 2872f57a6a5dSKent Overstreet if (s->s[i].state >= SECTOR_DIRTY) 2873543ef2ebSKent Overstreet return i << 9; 2874f57a6a5dSKent Overstreet 2875543ef2ebSKent Overstreet return -1; 28761c6fdbd8SKent Overstreet } 28771c6fdbd8SKent Overstreet 2878543ef2ebSKent Overstreet static loff_t bch2_seek_pagecache_data(struct inode *vinode, 28791c6fdbd8SKent Overstreet loff_t start_offset, 28801c6fdbd8SKent Overstreet loff_t end_offset) 28811c6fdbd8SKent Overstreet { 28821c6fdbd8SKent Overstreet struct folio_batch fbatch; 28831c6fdbd8SKent Overstreet pgoff_t start_index = start_offset >> PAGE_SHIFT; 28841c6fdbd8SKent Overstreet pgoff_t end_index = end_offset >> PAGE_SHIFT; 28851c6fdbd8SKent Overstreet pgoff_t index = start_index; 28861c6fdbd8SKent Overstreet unsigned i; 2887543ef2ebSKent Overstreet loff_t ret; 2888543ef2ebSKent Overstreet int offset; 28891c6fdbd8SKent Overstreet 28901c6fdbd8SKent Overstreet folio_batch_init(&fbatch); 28911c6fdbd8SKent Overstreet 28921c6fdbd8SKent Overstreet while (filemap_get_folios(vinode->i_mapping, 28931c6fdbd8SKent Overstreet &index, end_index, &fbatch)) { 28941c6fdbd8SKent Overstreet for (i = 0; i < folio_batch_count(&fbatch); i++) { 28951c6fdbd8SKent Overstreet struct folio *folio = fbatch.folios[i]; 28961c6fdbd8SKent Overstreet 28971c6fdbd8SKent Overstreet folio_lock(folio); 2898543ef2ebSKent Overstreet offset = folio_data_offset(folio, 2899543ef2ebSKent Overstreet folio->index == start_index 2900543ef2ebSKent Overstreet ? start_offset & (PAGE_SIZE - 1) 2901543ef2ebSKent Overstreet : 0); 2902543ef2ebSKent Overstreet if (offset >= 0) { 2903543ef2ebSKent Overstreet ret = clamp(((loff_t) folio->index << PAGE_SHIFT) + 2904543ef2ebSKent Overstreet offset, 2905543ef2ebSKent Overstreet start_offset, end_offset); 29061c6fdbd8SKent Overstreet folio_unlock(folio); 29071c6fdbd8SKent Overstreet folio_batch_release(&fbatch); 2908543ef2ebSKent Overstreet return ret; 29091c6fdbd8SKent Overstreet } 29101c6fdbd8SKent Overstreet folio_unlock(folio); 29111c6fdbd8SKent Overstreet } 29121c6fdbd8SKent Overstreet folio_batch_release(&fbatch); 29131c6fdbd8SKent Overstreet cond_resched(); 29141c6fdbd8SKent Overstreet } 29151c6fdbd8SKent Overstreet 29161c6fdbd8SKent Overstreet return end_offset; 29171c6fdbd8SKent Overstreet } 29181c6fdbd8SKent Overstreet 29191c6fdbd8SKent Overstreet static loff_t bch2_seek_data(struct file *file, u64 offset) 29201c6fdbd8SKent Overstreet { 29211c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 29221c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 2923424eb881SKent Overstreet struct btree_trans trans; 2924424eb881SKent Overstreet struct btree_iter *iter; 29251c6fdbd8SKent Overstreet struct bkey_s_c k; 29261c6fdbd8SKent Overstreet u64 isize, next_data = MAX_LFS_FILESIZE; 29271c6fdbd8SKent Overstreet int ret; 29281c6fdbd8SKent Overstreet 29291c6fdbd8SKent Overstreet isize = i_size_read(&inode->v); 29301c6fdbd8SKent Overstreet if (offset >= isize) 29311c6fdbd8SKent Overstreet return -ENXIO; 29321c6fdbd8SKent Overstreet 293320bceecbSKent Overstreet bch2_trans_init(&trans, c, 0, 0); 2934424eb881SKent Overstreet 2935424eb881SKent Overstreet for_each_btree_key(&trans, iter, BTREE_ID_EXTENTS, 293694f651e2SKent Overstreet POS(inode->v.i_ino, offset >> 9), 0, k, ret) { 29371c6fdbd8SKent Overstreet if (k.k->p.inode != inode->v.i_ino) { 29381c6fdbd8SKent Overstreet break; 29391c6fdbd8SKent Overstreet } else if (bkey_extent_is_data(k.k)) { 29401c6fdbd8SKent Overstreet next_data = max(offset, bkey_start_offset(k.k) << 9); 29411c6fdbd8SKent Overstreet break; 29421c6fdbd8SKent Overstreet } else if (k.k->p.offset >> 9 > isize) 29431c6fdbd8SKent Overstreet break; 29441c6fdbd8SKent Overstreet } 29451c6fdbd8SKent Overstreet 294694f651e2SKent Overstreet ret = bch2_trans_exit(&trans) ?: ret; 29471c6fdbd8SKent Overstreet if (ret) 29481c6fdbd8SKent Overstreet return ret; 29491c6fdbd8SKent Overstreet 29501c6fdbd8SKent Overstreet if (next_data > offset) 2951543ef2ebSKent Overstreet next_data = bch2_seek_pagecache_data(&inode->v, 29521c6fdbd8SKent Overstreet offset, next_data); 29531c6fdbd8SKent Overstreet 2954e10d3094SKent Overstreet if (next_data >= isize) 29551c6fdbd8SKent Overstreet return -ENXIO; 29561c6fdbd8SKent Overstreet 29571c6fdbd8SKent Overstreet return vfs_setpos(file, next_data, MAX_LFS_FILESIZE); 29581c6fdbd8SKent Overstreet } 29591c6fdbd8SKent Overstreet 2960543ef2ebSKent Overstreet static int __page_hole_offset(struct page *page, unsigned offset) 29611c6fdbd8SKent Overstreet { 2962543ef2ebSKent Overstreet struct bch_page_state *s = bch2_page_state(page); 2963543ef2ebSKent Overstreet unsigned i; 2964543ef2ebSKent Overstreet 2965543ef2ebSKent Overstreet if (!s) 2966543ef2ebSKent Overstreet return 0; 2967543ef2ebSKent Overstreet 2968543ef2ebSKent Overstreet for (i = offset >> 9; i < PAGE_SECTORS; i++) 2969543ef2ebSKent Overstreet if (s->s[i].state < SECTOR_DIRTY) 2970543ef2ebSKent Overstreet return i << 9; 2971543ef2ebSKent Overstreet 2972543ef2ebSKent Overstreet return -1; 2973543ef2ebSKent Overstreet } 2974543ef2ebSKent Overstreet 2975543ef2ebSKent Overstreet static loff_t page_hole_offset(struct address_space *mapping, loff_t offset) 2976543ef2ebSKent Overstreet { 2977543ef2ebSKent Overstreet pgoff_t index = offset >> PAGE_SHIFT; 29781c6fdbd8SKent Overstreet struct page *page; 2979543ef2ebSKent Overstreet int pg_offset; 2980543ef2ebSKent Overstreet loff_t ret = -1; 29811c6fdbd8SKent Overstreet 29821c6fdbd8SKent Overstreet page = find_lock_page(mapping, index); 29831c6fdbd8SKent Overstreet if (!page) 2984543ef2ebSKent Overstreet return offset; 29851c6fdbd8SKent Overstreet 2986543ef2ebSKent Overstreet pg_offset = __page_hole_offset(page, offset & (PAGE_SIZE - 1)); 2987543ef2ebSKent Overstreet if (pg_offset >= 0) 2988543ef2ebSKent Overstreet ret = ((loff_t) index << PAGE_SHIFT) + pg_offset; 2989543ef2ebSKent Overstreet 29901c6fdbd8SKent Overstreet unlock_page(page); 29911c6fdbd8SKent Overstreet 29921c6fdbd8SKent Overstreet return ret; 29931c6fdbd8SKent Overstreet } 29941c6fdbd8SKent Overstreet 2995543ef2ebSKent Overstreet static loff_t bch2_seek_pagecache_hole(struct inode *vinode, 29961c6fdbd8SKent Overstreet loff_t start_offset, 29971c6fdbd8SKent Overstreet loff_t end_offset) 29981c6fdbd8SKent Overstreet { 29991c6fdbd8SKent Overstreet struct address_space *mapping = vinode->i_mapping; 3000543ef2ebSKent Overstreet loff_t offset = start_offset, hole; 30011c6fdbd8SKent Overstreet 3002543ef2ebSKent Overstreet while (offset < end_offset) { 3003543ef2ebSKent Overstreet hole = page_hole_offset(mapping, offset); 3004543ef2ebSKent Overstreet if (hole >= 0 && hole <= end_offset) 3005543ef2ebSKent Overstreet return max(start_offset, hole); 3006543ef2ebSKent Overstreet 3007543ef2ebSKent Overstreet offset += PAGE_SIZE; 3008543ef2ebSKent Overstreet offset &= PAGE_MASK; 3009543ef2ebSKent Overstreet } 30101c6fdbd8SKent Overstreet 30111c6fdbd8SKent Overstreet return end_offset; 30121c6fdbd8SKent Overstreet } 30131c6fdbd8SKent Overstreet 30141c6fdbd8SKent Overstreet static loff_t bch2_seek_hole(struct file *file, u64 offset) 30151c6fdbd8SKent Overstreet { 30161c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 30171c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 3018424eb881SKent Overstreet struct btree_trans trans; 3019424eb881SKent Overstreet struct btree_iter *iter; 30201c6fdbd8SKent Overstreet struct bkey_s_c k; 30211c6fdbd8SKent Overstreet u64 isize, next_hole = MAX_LFS_FILESIZE; 30221c6fdbd8SKent Overstreet int ret; 30231c6fdbd8SKent Overstreet 30241c6fdbd8SKent Overstreet isize = i_size_read(&inode->v); 30251c6fdbd8SKent Overstreet if (offset >= isize) 30261c6fdbd8SKent Overstreet return -ENXIO; 30271c6fdbd8SKent Overstreet 302820bceecbSKent Overstreet bch2_trans_init(&trans, c, 0, 0); 3029424eb881SKent Overstreet 3030424eb881SKent Overstreet for_each_btree_key(&trans, iter, BTREE_ID_EXTENTS, 30311c6fdbd8SKent Overstreet POS(inode->v.i_ino, offset >> 9), 303294f651e2SKent Overstreet BTREE_ITER_SLOTS, k, ret) { 30331c6fdbd8SKent Overstreet if (k.k->p.inode != inode->v.i_ino) { 3034543ef2ebSKent Overstreet next_hole = bch2_seek_pagecache_hole(&inode->v, 30351c6fdbd8SKent Overstreet offset, MAX_LFS_FILESIZE); 30361c6fdbd8SKent Overstreet break; 30371c6fdbd8SKent Overstreet } else if (!bkey_extent_is_data(k.k)) { 3038543ef2ebSKent Overstreet next_hole = bch2_seek_pagecache_hole(&inode->v, 30391c6fdbd8SKent Overstreet max(offset, bkey_start_offset(k.k) << 9), 30401c6fdbd8SKent Overstreet k.k->p.offset << 9); 30411c6fdbd8SKent Overstreet 30421c6fdbd8SKent Overstreet if (next_hole < k.k->p.offset << 9) 30431c6fdbd8SKent Overstreet break; 30441c6fdbd8SKent Overstreet } else { 30451c6fdbd8SKent Overstreet offset = max(offset, bkey_start_offset(k.k) << 9); 30461c6fdbd8SKent Overstreet } 30471c6fdbd8SKent Overstreet } 30481c6fdbd8SKent Overstreet 304994f651e2SKent Overstreet ret = bch2_trans_exit(&trans) ?: ret; 30501c6fdbd8SKent Overstreet if (ret) 30511c6fdbd8SKent Overstreet return ret; 30521c6fdbd8SKent Overstreet 30531c6fdbd8SKent Overstreet if (next_hole > isize) 30541c6fdbd8SKent Overstreet next_hole = isize; 30551c6fdbd8SKent Overstreet 30561c6fdbd8SKent Overstreet return vfs_setpos(file, next_hole, MAX_LFS_FILESIZE); 30571c6fdbd8SKent Overstreet } 30581c6fdbd8SKent Overstreet 30591c6fdbd8SKent Overstreet loff_t bch2_llseek(struct file *file, loff_t offset, int whence) 30601c6fdbd8SKent Overstreet { 30611c6fdbd8SKent Overstreet switch (whence) { 30621c6fdbd8SKent Overstreet case SEEK_SET: 30631c6fdbd8SKent Overstreet case SEEK_CUR: 30641c6fdbd8SKent Overstreet case SEEK_END: 30651c6fdbd8SKent Overstreet return generic_file_llseek(file, offset, whence); 30661c6fdbd8SKent Overstreet case SEEK_DATA: 30671c6fdbd8SKent Overstreet return bch2_seek_data(file, offset); 30681c6fdbd8SKent Overstreet case SEEK_HOLE: 30691c6fdbd8SKent Overstreet return bch2_seek_hole(file, offset); 30701c6fdbd8SKent Overstreet } 30711c6fdbd8SKent Overstreet 30721c6fdbd8SKent Overstreet return -EINVAL; 30731c6fdbd8SKent Overstreet } 30741c6fdbd8SKent Overstreet 30751c6fdbd8SKent Overstreet void bch2_fs_fsio_exit(struct bch_fs *c) 30761c6fdbd8SKent Overstreet { 30771c6fdbd8SKent Overstreet bioset_exit(&c->dio_write_bioset); 30781c6fdbd8SKent Overstreet bioset_exit(&c->dio_read_bioset); 30791c6fdbd8SKent Overstreet bioset_exit(&c->writepage_bioset); 30801c6fdbd8SKent Overstreet } 30811c6fdbd8SKent Overstreet 30821c6fdbd8SKent Overstreet int bch2_fs_fsio_init(struct bch_fs *c) 30831c6fdbd8SKent Overstreet { 30841c6fdbd8SKent Overstreet int ret = 0; 30851c6fdbd8SKent Overstreet 30861c6fdbd8SKent Overstreet pr_verbose_init(c->opts, ""); 30871c6fdbd8SKent Overstreet 30881c6fdbd8SKent Overstreet if (bioset_init(&c->writepage_bioset, 30899a3df993SKent Overstreet 4, offsetof(struct bch_writepage_io, op.wbio.bio), 30901c6fdbd8SKent Overstreet BIOSET_NEED_BVECS) || 30911c6fdbd8SKent Overstreet bioset_init(&c->dio_read_bioset, 30921c6fdbd8SKent Overstreet 4, offsetof(struct dio_read, rbio.bio), 30931c6fdbd8SKent Overstreet BIOSET_NEED_BVECS) || 30941c6fdbd8SKent Overstreet bioset_init(&c->dio_write_bioset, 30959a3df993SKent Overstreet 4, offsetof(struct dio_write, op.wbio.bio), 30961c6fdbd8SKent Overstreet BIOSET_NEED_BVECS)) 30971c6fdbd8SKent Overstreet ret = -ENOMEM; 30981c6fdbd8SKent Overstreet 30991c6fdbd8SKent Overstreet pr_verbose_init(c->opts, "ret %i", ret); 31001c6fdbd8SKent Overstreet return ret; 31011c6fdbd8SKent Overstreet } 31021c6fdbd8SKent Overstreet 31031c6fdbd8SKent Overstreet #endif /* NO_BCACHEFS_FS */ 3104