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> 30*9ba2eb25SKent Overstreet #include <linux/rmap.h> 311c6fdbd8SKent Overstreet #include <linux/sched/signal.h> 321c6fdbd8SKent Overstreet #include <linux/task_io_accounting_ops.h> 331c6fdbd8SKent Overstreet #include <linux/uio.h> 341c6fdbd8SKent Overstreet #include <linux/writeback.h> 351c6fdbd8SKent Overstreet 361c6fdbd8SKent Overstreet #include <trace/events/writeback.h> 371c6fdbd8SKent Overstreet 387f5e31e1SKent Overstreet static inline bool bio_full(struct bio *bio, unsigned len) 397f5e31e1SKent Overstreet { 407f5e31e1SKent Overstreet if (bio->bi_vcnt >= bio->bi_max_vecs) 417f5e31e1SKent Overstreet return true; 427f5e31e1SKent Overstreet if (bio->bi_iter.bi_size > UINT_MAX - len) 437f5e31e1SKent Overstreet return true; 447f5e31e1SKent Overstreet return false; 457f5e31e1SKent Overstreet } 467f5e31e1SKent Overstreet 471c6fdbd8SKent Overstreet struct quota_res { 481c6fdbd8SKent Overstreet u64 sectors; 491c6fdbd8SKent Overstreet }; 501c6fdbd8SKent Overstreet 519a3df993SKent Overstreet struct bch_writepage_io { 529a3df993SKent Overstreet struct closure cl; 531c6fdbd8SKent Overstreet struct bch_inode_info *inode; 541c6fdbd8SKent Overstreet 551c6fdbd8SKent Overstreet /* must be last: */ 561c6fdbd8SKent Overstreet struct bch_write_op op; 571c6fdbd8SKent Overstreet }; 581c6fdbd8SKent Overstreet 591c6fdbd8SKent Overstreet struct dio_write { 60f8f30863SKent Overstreet struct completion done; 611c6fdbd8SKent Overstreet struct kiocb *req; 62ed484030SKent Overstreet struct mm_struct *mm; 631c6fdbd8SKent Overstreet unsigned loop:1, 641c6fdbd8SKent Overstreet sync:1, 651c6fdbd8SKent Overstreet free_iov:1; 661c6fdbd8SKent Overstreet struct quota_res quota_res; 67042a1f26SKent Overstreet u64 written; 681c6fdbd8SKent Overstreet 691c6fdbd8SKent Overstreet struct iov_iter iter; 701c6fdbd8SKent Overstreet struct iovec inline_vecs[2]; 711c6fdbd8SKent Overstreet 721c6fdbd8SKent Overstreet /* must be last: */ 739a3df993SKent Overstreet struct bch_write_op op; 741c6fdbd8SKent Overstreet }; 751c6fdbd8SKent Overstreet 761c6fdbd8SKent Overstreet struct dio_read { 771c6fdbd8SKent Overstreet struct closure cl; 781c6fdbd8SKent Overstreet struct kiocb *req; 791c6fdbd8SKent Overstreet long ret; 801c6fdbd8SKent Overstreet struct bch_read_bio rbio; 811c6fdbd8SKent Overstreet }; 821c6fdbd8SKent Overstreet 831c6fdbd8SKent Overstreet /* pagecache_block must be held */ 84a023127aSKent Overstreet static noinline int write_invalidate_inode_pages_range(struct address_space *mapping, 851c6fdbd8SKent Overstreet loff_t start, loff_t end) 861c6fdbd8SKent Overstreet { 871c6fdbd8SKent Overstreet int ret; 881c6fdbd8SKent Overstreet 891c6fdbd8SKent Overstreet /* 901c6fdbd8SKent Overstreet * XXX: the way this is currently implemented, we can spin if a process 911c6fdbd8SKent Overstreet * is continually redirtying a specific page 921c6fdbd8SKent Overstreet */ 931c6fdbd8SKent Overstreet do { 941c6fdbd8SKent Overstreet if (!mapping->nrpages) 951c6fdbd8SKent Overstreet return 0; 961c6fdbd8SKent Overstreet 971c6fdbd8SKent Overstreet ret = filemap_write_and_wait_range(mapping, start, end); 981c6fdbd8SKent Overstreet if (ret) 991c6fdbd8SKent Overstreet break; 1001c6fdbd8SKent Overstreet 1011c6fdbd8SKent Overstreet if (!mapping->nrpages) 1021c6fdbd8SKent Overstreet return 0; 1031c6fdbd8SKent Overstreet 1041c6fdbd8SKent Overstreet ret = invalidate_inode_pages2_range(mapping, 1051c6fdbd8SKent Overstreet start >> PAGE_SHIFT, 1061c6fdbd8SKent Overstreet end >> PAGE_SHIFT); 1071c6fdbd8SKent Overstreet } while (ret == -EBUSY); 1081c6fdbd8SKent Overstreet 1091c6fdbd8SKent Overstreet return ret; 1101c6fdbd8SKent Overstreet } 1111c6fdbd8SKent Overstreet 1121c6fdbd8SKent Overstreet /* quotas */ 1131c6fdbd8SKent Overstreet 1141c6fdbd8SKent Overstreet #ifdef CONFIG_BCACHEFS_QUOTA 1151c6fdbd8SKent Overstreet 1161c6fdbd8SKent Overstreet static void bch2_quota_reservation_put(struct bch_fs *c, 1171c6fdbd8SKent Overstreet struct bch_inode_info *inode, 1181c6fdbd8SKent Overstreet struct quota_res *res) 1191c6fdbd8SKent Overstreet { 1201c6fdbd8SKent Overstreet if (!res->sectors) 1211c6fdbd8SKent Overstreet return; 1221c6fdbd8SKent Overstreet 1231c6fdbd8SKent Overstreet mutex_lock(&inode->ei_quota_lock); 1241c6fdbd8SKent Overstreet BUG_ON(res->sectors > inode->ei_quota_reserved); 1251c6fdbd8SKent Overstreet 1261c6fdbd8SKent Overstreet bch2_quota_acct(c, inode->ei_qid, Q_SPC, 12726609b61SKent Overstreet -((s64) res->sectors), KEY_TYPE_QUOTA_PREALLOC); 1281c6fdbd8SKent Overstreet inode->ei_quota_reserved -= res->sectors; 1291c6fdbd8SKent Overstreet mutex_unlock(&inode->ei_quota_lock); 1301c6fdbd8SKent Overstreet 1311c6fdbd8SKent Overstreet res->sectors = 0; 1321c6fdbd8SKent Overstreet } 1331c6fdbd8SKent Overstreet 1341c6fdbd8SKent Overstreet static int bch2_quota_reservation_add(struct bch_fs *c, 1351c6fdbd8SKent Overstreet struct bch_inode_info *inode, 1361c6fdbd8SKent Overstreet struct quota_res *res, 1371c6fdbd8SKent Overstreet unsigned sectors, 1381c6fdbd8SKent Overstreet bool check_enospc) 1391c6fdbd8SKent Overstreet { 1401c6fdbd8SKent Overstreet int ret; 1411c6fdbd8SKent Overstreet 1421c6fdbd8SKent Overstreet mutex_lock(&inode->ei_quota_lock); 1431c6fdbd8SKent Overstreet ret = bch2_quota_acct(c, inode->ei_qid, Q_SPC, sectors, 14426609b61SKent Overstreet check_enospc ? KEY_TYPE_QUOTA_PREALLOC : KEY_TYPE_QUOTA_NOCHECK); 1451c6fdbd8SKent Overstreet if (likely(!ret)) { 1461c6fdbd8SKent Overstreet inode->ei_quota_reserved += sectors; 1471c6fdbd8SKent Overstreet res->sectors += sectors; 1481c6fdbd8SKent Overstreet } 1491c6fdbd8SKent Overstreet mutex_unlock(&inode->ei_quota_lock); 1501c6fdbd8SKent Overstreet 1511c6fdbd8SKent Overstreet return ret; 1521c6fdbd8SKent Overstreet } 1531c6fdbd8SKent Overstreet 1541c6fdbd8SKent Overstreet #else 1551c6fdbd8SKent Overstreet 1561c6fdbd8SKent Overstreet static void bch2_quota_reservation_put(struct bch_fs *c, 1571c6fdbd8SKent Overstreet struct bch_inode_info *inode, 1581c6fdbd8SKent Overstreet struct quota_res *res) 1591c6fdbd8SKent Overstreet { 1601c6fdbd8SKent Overstreet } 1611c6fdbd8SKent Overstreet 1621c6fdbd8SKent Overstreet static int bch2_quota_reservation_add(struct bch_fs *c, 1631c6fdbd8SKent Overstreet struct bch_inode_info *inode, 1641c6fdbd8SKent Overstreet struct quota_res *res, 1651c6fdbd8SKent Overstreet unsigned sectors, 1661c6fdbd8SKent Overstreet bool check_enospc) 1671c6fdbd8SKent Overstreet { 1681c6fdbd8SKent Overstreet return 0; 1691c6fdbd8SKent Overstreet } 1701c6fdbd8SKent Overstreet 1711c6fdbd8SKent Overstreet #endif 1721c6fdbd8SKent Overstreet 1731c6fdbd8SKent Overstreet /* i_size updates: */ 1741c6fdbd8SKent Overstreet 1752ea90048SKent Overstreet struct inode_new_size { 1762ea90048SKent Overstreet loff_t new_size; 1772ea90048SKent Overstreet u64 now; 1782ea90048SKent Overstreet unsigned fields; 1792ea90048SKent Overstreet }; 1802ea90048SKent Overstreet 1811c6fdbd8SKent Overstreet static int inode_set_size(struct bch_inode_info *inode, 1821c6fdbd8SKent Overstreet struct bch_inode_unpacked *bi, 1831c6fdbd8SKent Overstreet void *p) 1841c6fdbd8SKent Overstreet { 1852ea90048SKent Overstreet struct inode_new_size *s = p; 1861c6fdbd8SKent Overstreet 1872ea90048SKent Overstreet bi->bi_size = s->new_size; 1882ea90048SKent Overstreet if (s->fields & ATTR_ATIME) 1892ea90048SKent Overstreet bi->bi_atime = s->now; 1902ea90048SKent Overstreet if (s->fields & ATTR_MTIME) 1912ea90048SKent Overstreet bi->bi_mtime = s->now; 1922ea90048SKent Overstreet if (s->fields & ATTR_CTIME) 1932ea90048SKent Overstreet bi->bi_ctime = s->now; 1941c6fdbd8SKent Overstreet 1951c6fdbd8SKent Overstreet return 0; 1961c6fdbd8SKent Overstreet } 1971c6fdbd8SKent Overstreet 19876426098SKent Overstreet int __must_check bch2_write_inode_size(struct bch_fs *c, 1991c6fdbd8SKent Overstreet struct bch_inode_info *inode, 2002ea90048SKent Overstreet loff_t new_size, unsigned fields) 2011c6fdbd8SKent Overstreet { 2022ea90048SKent Overstreet struct inode_new_size s = { 2032ea90048SKent Overstreet .new_size = new_size, 2042ea90048SKent Overstreet .now = bch2_current_time(c), 2052ea90048SKent Overstreet .fields = fields, 2062ea90048SKent Overstreet }; 2072ea90048SKent Overstreet 2082ea90048SKent Overstreet return bch2_write_inode(c, inode, inode_set_size, &s, fields); 2091c6fdbd8SKent Overstreet } 2101c6fdbd8SKent Overstreet 2111c6fdbd8SKent Overstreet static void i_sectors_acct(struct bch_fs *c, struct bch_inode_info *inode, 212190fa7afSKent Overstreet struct quota_res *quota_res, s64 sectors) 2131c6fdbd8SKent Overstreet { 214190fa7afSKent Overstreet if (!sectors) 215190fa7afSKent Overstreet return; 216190fa7afSKent Overstreet 2171c6fdbd8SKent Overstreet mutex_lock(&inode->ei_quota_lock); 2181c6fdbd8SKent Overstreet #ifdef CONFIG_BCACHEFS_QUOTA 2191c6fdbd8SKent Overstreet if (quota_res && sectors > 0) { 2201c6fdbd8SKent Overstreet BUG_ON(sectors > quota_res->sectors); 2211c6fdbd8SKent Overstreet BUG_ON(sectors > inode->ei_quota_reserved); 2221c6fdbd8SKent Overstreet 2231c6fdbd8SKent Overstreet quota_res->sectors -= sectors; 2241c6fdbd8SKent Overstreet inode->ei_quota_reserved -= sectors; 2251c6fdbd8SKent Overstreet } else { 22626609b61SKent Overstreet bch2_quota_acct(c, inode->ei_qid, Q_SPC, sectors, KEY_TYPE_QUOTA_WARN); 2271c6fdbd8SKent Overstreet } 2281c6fdbd8SKent Overstreet #endif 2291c6fdbd8SKent Overstreet inode->v.i_blocks += sectors; 2301c6fdbd8SKent Overstreet mutex_unlock(&inode->ei_quota_lock); 2311c6fdbd8SKent Overstreet } 2321c6fdbd8SKent Overstreet 2331c6fdbd8SKent Overstreet /* page state: */ 2341c6fdbd8SKent Overstreet 2351c6fdbd8SKent Overstreet /* stored in page->private: */ 2361c6fdbd8SKent Overstreet 237f57a6a5dSKent Overstreet struct bch_page_sector { 238f81b648dSKent Overstreet /* Uncompressed, fully allocated replicas: */ 239f57a6a5dSKent Overstreet unsigned nr_replicas:3; 240f81b648dSKent Overstreet 241f81b648dSKent Overstreet /* Owns PAGE_SECTORS * replicas_reserved sized reservation: */ 242f57a6a5dSKent Overstreet unsigned replicas_reserved:3; 2431c6fdbd8SKent Overstreet 244f57a6a5dSKent Overstreet /* i_sectors: */ 245f57a6a5dSKent Overstreet enum { 246f57a6a5dSKent Overstreet SECTOR_UNALLOCATED, 2472ba5d38bSKent Overstreet SECTOR_RESERVED, 248f57a6a5dSKent Overstreet SECTOR_DIRTY, 249f57a6a5dSKent Overstreet SECTOR_ALLOCATED, 250f57a6a5dSKent Overstreet } state:2; 2511c6fdbd8SKent Overstreet }; 2521c6fdbd8SKent Overstreet 253f57a6a5dSKent Overstreet struct bch_page_state { 2543826ee0bSKent Overstreet spinlock_t lock; 2557f5e31e1SKent Overstreet atomic_t write_count; 256f57a6a5dSKent Overstreet struct bch_page_sector s[PAGE_SECTORS]; 257f57a6a5dSKent Overstreet }; 258f57a6a5dSKent Overstreet 259f57a6a5dSKent Overstreet static inline struct bch_page_state *__bch2_page_state(struct page *page) 2601c6fdbd8SKent Overstreet { 261f57a6a5dSKent Overstreet return page_has_private(page) 262f57a6a5dSKent Overstreet ? (struct bch_page_state *) page_private(page) 263f57a6a5dSKent Overstreet : NULL; 264f57a6a5dSKent Overstreet } 2651c6fdbd8SKent Overstreet 266f57a6a5dSKent Overstreet static inline struct bch_page_state *bch2_page_state(struct page *page) 267f57a6a5dSKent Overstreet { 268e1036a2aSKent Overstreet EBUG_ON(!PageLocked(page)); 2691c6fdbd8SKent Overstreet 270f57a6a5dSKent Overstreet return __bch2_page_state(page); 271f57a6a5dSKent Overstreet } 272f57a6a5dSKent Overstreet 273f57a6a5dSKent Overstreet /* for newly allocated pages: */ 274f57a6a5dSKent Overstreet static void __bch2_page_state_release(struct page *page) 275f57a6a5dSKent Overstreet { 276f57a6a5dSKent Overstreet struct bch_page_state *s = __bch2_page_state(page); 277f57a6a5dSKent Overstreet 278f57a6a5dSKent Overstreet if (!s) 279f57a6a5dSKent Overstreet return; 280f57a6a5dSKent Overstreet 281f57a6a5dSKent Overstreet ClearPagePrivate(page); 282f57a6a5dSKent Overstreet set_page_private(page, 0); 283f57a6a5dSKent Overstreet put_page(page); 284f57a6a5dSKent Overstreet kfree(s); 285f57a6a5dSKent Overstreet } 286f57a6a5dSKent Overstreet 287f57a6a5dSKent Overstreet static void bch2_page_state_release(struct page *page) 288f57a6a5dSKent Overstreet { 289f57a6a5dSKent Overstreet struct bch_page_state *s = bch2_page_state(page); 290f57a6a5dSKent Overstreet 291f57a6a5dSKent Overstreet if (!s) 292f57a6a5dSKent Overstreet return; 293f57a6a5dSKent Overstreet 294f57a6a5dSKent Overstreet ClearPagePrivate(page); 295f57a6a5dSKent Overstreet set_page_private(page, 0); 296f57a6a5dSKent Overstreet put_page(page); 297f57a6a5dSKent Overstreet kfree(s); 298f57a6a5dSKent Overstreet } 299f57a6a5dSKent Overstreet 300f57a6a5dSKent Overstreet /* for newly allocated pages: */ 301f57a6a5dSKent Overstreet static struct bch_page_state *__bch2_page_state_create(struct page *page, 302f57a6a5dSKent Overstreet gfp_t gfp) 303f57a6a5dSKent Overstreet { 304f57a6a5dSKent Overstreet struct bch_page_state *s; 305f57a6a5dSKent Overstreet 306f57a6a5dSKent Overstreet s = kzalloc(sizeof(*s), GFP_NOFS|gfp); 307f57a6a5dSKent Overstreet if (!s) 308f57a6a5dSKent Overstreet return NULL; 309f57a6a5dSKent Overstreet 3103826ee0bSKent Overstreet spin_lock_init(&s->lock); 311f57a6a5dSKent Overstreet /* 312f57a6a5dSKent Overstreet * migrate_page_move_mapping() assumes that pages with private data 313f57a6a5dSKent Overstreet * have their count elevated by 1. 314f57a6a5dSKent Overstreet */ 315f57a6a5dSKent Overstreet get_page(page); 316f57a6a5dSKent Overstreet set_page_private(page, (unsigned long) s); 3171c6fdbd8SKent Overstreet SetPagePrivate(page); 3181c6fdbd8SKent Overstreet return s; 3191c6fdbd8SKent Overstreet } 3201c6fdbd8SKent Overstreet 321f57a6a5dSKent Overstreet static struct bch_page_state *bch2_page_state_create(struct page *page, 322f57a6a5dSKent Overstreet gfp_t gfp) 323f57a6a5dSKent Overstreet { 324f57a6a5dSKent Overstreet return bch2_page_state(page) ?: __bch2_page_state_create(page, gfp); 325f57a6a5dSKent Overstreet } 326f57a6a5dSKent Overstreet 327e1036a2aSKent Overstreet static inline unsigned inode_nr_replicas(struct bch_fs *c, struct bch_inode_info *inode) 328e1036a2aSKent Overstreet { 329e1036a2aSKent Overstreet /* XXX: this should not be open coded */ 330e1036a2aSKent Overstreet return inode->ei_inode.bi_data_replicas 331e1036a2aSKent Overstreet ? inode->ei_inode.bi_data_replicas - 1 332e1036a2aSKent Overstreet : c->opts.data_replicas; 333e1036a2aSKent Overstreet } 334e1036a2aSKent Overstreet 335f57a6a5dSKent Overstreet static inline unsigned sectors_to_reserve(struct bch_page_sector *s, 336f57a6a5dSKent Overstreet unsigned nr_replicas) 337f57a6a5dSKent Overstreet { 338f57a6a5dSKent Overstreet return max(0, (int) nr_replicas - 339f57a6a5dSKent Overstreet s->nr_replicas - 340f57a6a5dSKent Overstreet s->replicas_reserved); 341f57a6a5dSKent Overstreet } 342f57a6a5dSKent Overstreet 343f57a6a5dSKent Overstreet static int bch2_get_page_disk_reservation(struct bch_fs *c, 344f57a6a5dSKent Overstreet struct bch_inode_info *inode, 3451c6fdbd8SKent Overstreet struct page *page, bool check_enospc) 3461c6fdbd8SKent Overstreet { 347f57a6a5dSKent Overstreet struct bch_page_state *s = bch2_page_state_create(page, 0); 348e1036a2aSKent Overstreet unsigned nr_replicas = inode_nr_replicas(c, inode); 349f57a6a5dSKent Overstreet struct disk_reservation disk_res = { 0 }; 350f57a6a5dSKent Overstreet unsigned i, disk_res_sectors = 0; 351f81b648dSKent Overstreet int ret; 3521c6fdbd8SKent Overstreet 353f57a6a5dSKent Overstreet if (!s) 354f57a6a5dSKent Overstreet return -ENOMEM; 3551c6fdbd8SKent Overstreet 356f57a6a5dSKent Overstreet for (i = 0; i < ARRAY_SIZE(s->s); i++) 357f57a6a5dSKent Overstreet disk_res_sectors += sectors_to_reserve(&s->s[i], nr_replicas); 358f57a6a5dSKent Overstreet 359f57a6a5dSKent Overstreet if (!disk_res_sectors) 360f57a6a5dSKent Overstreet return 0; 361f57a6a5dSKent Overstreet 362f57a6a5dSKent Overstreet ret = bch2_disk_reservation_get(c, &disk_res, 363f57a6a5dSKent Overstreet disk_res_sectors, 1, 364f57a6a5dSKent Overstreet !check_enospc 365f57a6a5dSKent Overstreet ? BCH_DISK_RESERVATION_NOFAIL 366f57a6a5dSKent Overstreet : 0); 3671c6fdbd8SKent Overstreet if (unlikely(ret)) 368f81b648dSKent Overstreet return ret; 369f81b648dSKent Overstreet 370f57a6a5dSKent Overstreet for (i = 0; i < ARRAY_SIZE(s->s); i++) 371f57a6a5dSKent Overstreet s->s[i].replicas_reserved += 372f57a6a5dSKent Overstreet sectors_to_reserve(&s->s[i], nr_replicas); 373f57a6a5dSKent Overstreet 374f57a6a5dSKent Overstreet return 0; 3751c6fdbd8SKent Overstreet } 3761c6fdbd8SKent Overstreet 377d1542e03SKent Overstreet struct bch2_page_reservation { 378d1542e03SKent Overstreet struct disk_reservation disk; 379d1542e03SKent Overstreet struct quota_res quota; 380d1542e03SKent Overstreet }; 381d1542e03SKent Overstreet 382d1542e03SKent Overstreet static void bch2_page_reservation_init(struct bch_fs *c, 383f57a6a5dSKent Overstreet struct bch_inode_info *inode, 384d1542e03SKent Overstreet struct bch2_page_reservation *res) 385d1542e03SKent Overstreet { 386d1542e03SKent Overstreet memset(res, 0, sizeof(*res)); 387d1542e03SKent Overstreet 388d1542e03SKent Overstreet res->disk.nr_replicas = inode_nr_replicas(c, inode); 389d1542e03SKent Overstreet } 390d1542e03SKent Overstreet 391d1542e03SKent Overstreet static void bch2_page_reservation_put(struct bch_fs *c, 392d1542e03SKent Overstreet struct bch_inode_info *inode, 393d1542e03SKent Overstreet struct bch2_page_reservation *res) 394d1542e03SKent Overstreet { 395d1542e03SKent Overstreet bch2_disk_reservation_put(c, &res->disk); 396d1542e03SKent Overstreet bch2_quota_reservation_put(c, inode, &res->quota); 397d1542e03SKent Overstreet } 398d1542e03SKent Overstreet 399d1542e03SKent Overstreet static int bch2_page_reservation_get(struct bch_fs *c, 400d1542e03SKent Overstreet struct bch_inode_info *inode, struct page *page, 401d1542e03SKent Overstreet struct bch2_page_reservation *res, 402d1542e03SKent Overstreet unsigned offset, unsigned len, bool check_enospc) 403f57a6a5dSKent Overstreet { 404f57a6a5dSKent Overstreet struct bch_page_state *s = bch2_page_state_create(page, 0); 405d1542e03SKent Overstreet unsigned i, disk_sectors = 0, quota_sectors = 0; 406f57a6a5dSKent Overstreet int ret; 407f57a6a5dSKent Overstreet 408f57a6a5dSKent Overstreet if (!s) 409f57a6a5dSKent Overstreet return -ENOMEM; 410f57a6a5dSKent Overstreet 4114b0a66d5SKent Overstreet for (i = round_down(offset, block_bytes(c)) >> 9; 4124b0a66d5SKent Overstreet i < round_up(offset + len, block_bytes(c)) >> 9; 413d1542e03SKent Overstreet i++) { 414d1542e03SKent Overstreet disk_sectors += sectors_to_reserve(&s->s[i], 415d1542e03SKent Overstreet res->disk.nr_replicas); 416d1542e03SKent Overstreet quota_sectors += s->s[i].state == SECTOR_UNALLOCATED; 4171c6fdbd8SKent Overstreet } 4181c6fdbd8SKent Overstreet 419d1542e03SKent Overstreet if (disk_sectors) { 420d1542e03SKent Overstreet ret = bch2_disk_reservation_add(c, &res->disk, 421d1542e03SKent Overstreet disk_sectors, 422d1542e03SKent Overstreet !check_enospc 423d1542e03SKent Overstreet ? BCH_DISK_RESERVATION_NOFAIL 424d1542e03SKent Overstreet : 0); 425d1542e03SKent Overstreet if (unlikely(ret)) 426d1542e03SKent Overstreet return ret; 427d1542e03SKent Overstreet } 428d1542e03SKent Overstreet 429d1542e03SKent Overstreet if (quota_sectors) { 430d1542e03SKent Overstreet ret = bch2_quota_reservation_add(c, inode, &res->quota, 431d1542e03SKent Overstreet quota_sectors, 432d1542e03SKent Overstreet check_enospc); 433d1542e03SKent Overstreet if (unlikely(ret)) { 434d1542e03SKent Overstreet struct disk_reservation tmp = { 435d1542e03SKent Overstreet .sectors = disk_sectors 436d1542e03SKent Overstreet }; 437d1542e03SKent Overstreet 438d1542e03SKent Overstreet bch2_disk_reservation_put(c, &tmp); 439d1542e03SKent Overstreet res->disk.sectors -= disk_sectors; 440d1542e03SKent Overstreet return ret; 441d1542e03SKent Overstreet } 442d1542e03SKent Overstreet } 443d1542e03SKent Overstreet 444d1542e03SKent Overstreet return 0; 445f57a6a5dSKent Overstreet } 446f57a6a5dSKent Overstreet 4471c6fdbd8SKent Overstreet static void bch2_clear_page_bits(struct page *page) 4481c6fdbd8SKent Overstreet { 4491c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(page->mapping->host); 4501c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 451f57a6a5dSKent Overstreet struct bch_page_state *s = bch2_page_state(page); 452d1542e03SKent Overstreet struct disk_reservation disk_res = { 0 }; 453f57a6a5dSKent Overstreet int i, dirty_sectors = 0; 4541c6fdbd8SKent Overstreet 455f57a6a5dSKent Overstreet if (!s) 4561c6fdbd8SKent Overstreet return; 4571c6fdbd8SKent Overstreet 4583826ee0bSKent Overstreet EBUG_ON(!PageLocked(page)); 4593826ee0bSKent Overstreet EBUG_ON(PageWriteback(page)); 4603826ee0bSKent Overstreet 461f57a6a5dSKent Overstreet for (i = 0; i < ARRAY_SIZE(s->s); i++) { 462d1542e03SKent Overstreet disk_res.sectors += s->s[i].replicas_reserved; 463d1542e03SKent Overstreet s->s[i].replicas_reserved = 0; 464d1542e03SKent Overstreet 465f57a6a5dSKent Overstreet if (s->s[i].state == SECTOR_DIRTY) { 466f57a6a5dSKent Overstreet dirty_sectors++; 467f57a6a5dSKent Overstreet s->s[i].state = SECTOR_UNALLOCATED; 468f57a6a5dSKent Overstreet } 469f57a6a5dSKent Overstreet } 470adfcfaf0SKent Overstreet 471d1542e03SKent Overstreet bch2_disk_reservation_put(c, &disk_res); 472d1542e03SKent Overstreet 473f57a6a5dSKent Overstreet if (dirty_sectors) 474f57a6a5dSKent Overstreet i_sectors_acct(c, inode, NULL, -dirty_sectors); 475adfcfaf0SKent Overstreet 476f57a6a5dSKent Overstreet bch2_page_state_release(page); 4771c6fdbd8SKent Overstreet } 4781c6fdbd8SKent Overstreet 479d1542e03SKent Overstreet static void bch2_set_page_dirty(struct bch_fs *c, 480d1542e03SKent Overstreet struct bch_inode_info *inode, struct page *page, 481d1542e03SKent Overstreet struct bch2_page_reservation *res, 482d1542e03SKent Overstreet unsigned offset, unsigned len) 4831c6fdbd8SKent Overstreet { 484d1542e03SKent Overstreet struct bch_page_state *s = bch2_page_state(page); 485f57a6a5dSKent Overstreet unsigned i, dirty_sectors = 0; 4861c6fdbd8SKent Overstreet 487877dfb34SKent Overstreet WARN_ON((u64) page_offset(page) + offset + len > 488877dfb34SKent Overstreet round_up((u64) i_size_read(&inode->v), block_bytes(c))); 489fb472ac5SKent Overstreet 4903826ee0bSKent Overstreet spin_lock(&s->lock); 4913826ee0bSKent Overstreet 4924b0a66d5SKent Overstreet for (i = round_down(offset, block_bytes(c)) >> 9; 4934b0a66d5SKent Overstreet i < round_up(offset + len, block_bytes(c)) >> 9; 494d1542e03SKent Overstreet i++) { 495d1542e03SKent Overstreet unsigned sectors = sectors_to_reserve(&s->s[i], 496d1542e03SKent Overstreet res->disk.nr_replicas); 4971c6fdbd8SKent Overstreet 498406d6d5aSKent Overstreet /* 499406d6d5aSKent Overstreet * This can happen if we race with the error path in 500406d6d5aSKent Overstreet * bch2_writepage_io_done(): 501406d6d5aSKent Overstreet */ 502406d6d5aSKent Overstreet sectors = min_t(unsigned, sectors, res->disk.sectors); 503406d6d5aSKent Overstreet 504d1542e03SKent Overstreet s->s[i].replicas_reserved += sectors; 505d1542e03SKent Overstreet res->disk.sectors -= sectors; 506adfcfaf0SKent Overstreet 5072ba5d38bSKent Overstreet if (s->s[i].state == SECTOR_UNALLOCATED) 508f57a6a5dSKent Overstreet dirty_sectors++; 5092ba5d38bSKent Overstreet 5102ba5d38bSKent Overstreet s->s[i].state = max_t(unsigned, s->s[i].state, SECTOR_DIRTY); 511f57a6a5dSKent Overstreet } 512f57a6a5dSKent Overstreet 5133826ee0bSKent Overstreet spin_unlock(&s->lock); 5143826ee0bSKent Overstreet 515f57a6a5dSKent Overstreet if (dirty_sectors) 516d1542e03SKent Overstreet i_sectors_acct(c, inode, &res->quota, dirty_sectors); 5171c6fdbd8SKent Overstreet 518d1542e03SKent Overstreet if (!PageDirty(page)) 519d1542e03SKent Overstreet filemap_dirty_folio(inode->v.i_mapping, page_folio(page)); 5201c6fdbd8SKent Overstreet } 5211c6fdbd8SKent Overstreet 5221c6fdbd8SKent Overstreet vm_fault_t bch2_page_fault(struct vm_fault *vmf) 5231c6fdbd8SKent Overstreet { 5241c6fdbd8SKent Overstreet struct file *file = vmf->vma->vm_file; 5251c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 5261c6fdbd8SKent Overstreet int ret; 5271c6fdbd8SKent Overstreet 5281c6fdbd8SKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 5291c6fdbd8SKent Overstreet ret = filemap_fault(vmf); 5301c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 5311c6fdbd8SKent Overstreet 5321c6fdbd8SKent Overstreet return ret; 5331c6fdbd8SKent Overstreet } 5341c6fdbd8SKent Overstreet 5351c6fdbd8SKent Overstreet vm_fault_t bch2_page_mkwrite(struct vm_fault *vmf) 5361c6fdbd8SKent Overstreet { 5371c6fdbd8SKent Overstreet struct page *page = vmf->page; 5381c6fdbd8SKent Overstreet struct file *file = vmf->vma->vm_file; 5391c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 5401c6fdbd8SKent Overstreet struct address_space *mapping = file->f_mapping; 5411c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 542d1542e03SKent Overstreet struct bch2_page_reservation res; 5436cc3535dSKent Overstreet unsigned len; 5446cc3535dSKent Overstreet loff_t isize; 5451c6fdbd8SKent Overstreet int ret = VM_FAULT_LOCKED; 5461c6fdbd8SKent Overstreet 547d1542e03SKent Overstreet bch2_page_reservation_init(c, inode, &res); 548d1542e03SKent Overstreet 5491c6fdbd8SKent Overstreet sb_start_pagefault(inode->v.i_sb); 5501c6fdbd8SKent Overstreet file_update_time(file); 5511c6fdbd8SKent Overstreet 5521c6fdbd8SKent Overstreet /* 5531c6fdbd8SKent Overstreet * Not strictly necessary, but helps avoid dio writes livelocking in 5541c6fdbd8SKent Overstreet * write_invalidate_inode_pages_range() - can drop this if/when we get 5551c6fdbd8SKent Overstreet * a write_invalidate_inode_pages_range() that works without dropping 5561c6fdbd8SKent Overstreet * page lock before invalidating page 5571c6fdbd8SKent Overstreet */ 5581c6fdbd8SKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 5591c6fdbd8SKent Overstreet 5601c6fdbd8SKent Overstreet lock_page(page); 5616cc3535dSKent Overstreet isize = i_size_read(&inode->v); 5626cc3535dSKent Overstreet 5636cc3535dSKent Overstreet if (page->mapping != mapping || page_offset(page) >= isize) { 5641c6fdbd8SKent Overstreet unlock_page(page); 5651c6fdbd8SKent Overstreet ret = VM_FAULT_NOPAGE; 5661c6fdbd8SKent Overstreet goto out; 5671c6fdbd8SKent Overstreet } 5681c6fdbd8SKent Overstreet 569d55460bbSKent Overstreet len = min_t(loff_t, PAGE_SIZE, isize - page_offset(page)); 5706cc3535dSKent Overstreet 5716cc3535dSKent Overstreet if (bch2_page_reservation_get(c, inode, page, &res, 0, len, true)) { 5721c6fdbd8SKent Overstreet unlock_page(page); 5731c6fdbd8SKent Overstreet ret = VM_FAULT_SIGBUS; 5741c6fdbd8SKent Overstreet goto out; 5751c6fdbd8SKent Overstreet } 5761c6fdbd8SKent Overstreet 5776cc3535dSKent Overstreet bch2_set_page_dirty(c, inode, page, &res, 0, len); 5781b783a69SKent Overstreet bch2_page_reservation_put(c, inode, &res); 5791b783a69SKent Overstreet 5801c6fdbd8SKent Overstreet wait_for_stable_page(page); 5811c6fdbd8SKent Overstreet out: 5821c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 5831c6fdbd8SKent Overstreet sb_end_pagefault(inode->v.i_sb); 584d1542e03SKent Overstreet 5851c6fdbd8SKent Overstreet return ret; 5861c6fdbd8SKent Overstreet } 5871c6fdbd8SKent Overstreet 5881c6fdbd8SKent Overstreet void bch2_invalidate_folio(struct folio *folio, size_t offset, size_t length) 5891c6fdbd8SKent Overstreet { 5901c6fdbd8SKent Overstreet if (offset || length < folio_size(folio)) 5911c6fdbd8SKent Overstreet return; 5921c6fdbd8SKent Overstreet 5931c6fdbd8SKent Overstreet bch2_clear_page_bits(&folio->page); 5941c6fdbd8SKent Overstreet } 5951c6fdbd8SKent Overstreet 5961c6fdbd8SKent Overstreet bool bch2_release_folio(struct folio *folio, gfp_t gfp_mask) 5971c6fdbd8SKent Overstreet { 598a6d90385SKent Overstreet if (folio_test_dirty(folio) || folio_test_writeback(folio)) 5991c6fdbd8SKent Overstreet return false; 6001c6fdbd8SKent Overstreet 6011c6fdbd8SKent Overstreet bch2_clear_page_bits(&folio->page); 6021c6fdbd8SKent Overstreet return true; 6031c6fdbd8SKent Overstreet } 6041c6fdbd8SKent Overstreet 6051c6fdbd8SKent Overstreet /* readpage(s): */ 6061c6fdbd8SKent Overstreet 6071c6fdbd8SKent Overstreet static void bch2_readpages_end_io(struct bio *bio) 6081c6fdbd8SKent Overstreet { 6091c6fdbd8SKent Overstreet struct bvec_iter_all iter; 6101c6fdbd8SKent Overstreet struct bio_vec *bv; 6111c6fdbd8SKent Overstreet 6121c6fdbd8SKent Overstreet bio_for_each_segment_all(bv, bio, iter) { 6131c6fdbd8SKent Overstreet struct page *page = bv->bv_page; 6141c6fdbd8SKent Overstreet 6151c6fdbd8SKent Overstreet if (!bio->bi_status) { 6161c6fdbd8SKent Overstreet SetPageUptodate(page); 6171c6fdbd8SKent Overstreet } else { 6181c6fdbd8SKent Overstreet ClearPageUptodate(page); 6191c6fdbd8SKent Overstreet SetPageError(page); 6201c6fdbd8SKent Overstreet } 6211c6fdbd8SKent Overstreet unlock_page(page); 6221c6fdbd8SKent Overstreet } 6231c6fdbd8SKent Overstreet 6241c6fdbd8SKent Overstreet bio_put(bio); 6251c6fdbd8SKent Overstreet } 6261c6fdbd8SKent Overstreet 6271c6fdbd8SKent Overstreet static inline void page_state_init_for_read(struct page *page) 6281c6fdbd8SKent Overstreet { 629f81b648dSKent Overstreet SetPagePrivate(page); 630f81b648dSKent Overstreet page->private = 0; 6311c6fdbd8SKent Overstreet } 6321c6fdbd8SKent Overstreet 6331c6fdbd8SKent Overstreet struct readpages_iter { 6341c6fdbd8SKent Overstreet struct address_space *mapping; 6351c6fdbd8SKent Overstreet struct page **pages; 6361c6fdbd8SKent Overstreet unsigned nr_pages; 6371c6fdbd8SKent Overstreet unsigned idx; 6381c6fdbd8SKent Overstreet pgoff_t offset; 6391c6fdbd8SKent Overstreet }; 6401c6fdbd8SKent Overstreet 6411c6fdbd8SKent Overstreet static int readpages_iter_init(struct readpages_iter *iter, 6421c6fdbd8SKent Overstreet struct readahead_control *ractl) 6431c6fdbd8SKent Overstreet { 6441c6fdbd8SKent Overstreet unsigned i, nr_pages = readahead_count(ractl); 6451c6fdbd8SKent Overstreet 6461c6fdbd8SKent Overstreet memset(iter, 0, sizeof(*iter)); 6471c6fdbd8SKent Overstreet 6481c6fdbd8SKent Overstreet iter->mapping = ractl->mapping; 6491c6fdbd8SKent Overstreet iter->offset = readahead_index(ractl); 6501c6fdbd8SKent Overstreet iter->nr_pages = nr_pages; 6511c6fdbd8SKent Overstreet 6521c6fdbd8SKent Overstreet iter->pages = kmalloc_array(nr_pages, sizeof(struct page *), GFP_NOFS); 6531c6fdbd8SKent Overstreet if (!iter->pages) 6541c6fdbd8SKent Overstreet return -ENOMEM; 6551c6fdbd8SKent Overstreet 6561c6fdbd8SKent Overstreet __readahead_batch(ractl, iter->pages, nr_pages); 6571c6fdbd8SKent Overstreet for (i = 0; i < nr_pages; i++) { 658f57a6a5dSKent Overstreet __bch2_page_state_create(iter->pages[i], __GFP_NOFAIL); 6591c6fdbd8SKent Overstreet put_page(iter->pages[i]); 6601c6fdbd8SKent Overstreet } 6611c6fdbd8SKent Overstreet 6621c6fdbd8SKent Overstreet return 0; 6631c6fdbd8SKent Overstreet } 6641c6fdbd8SKent Overstreet 6651c6fdbd8SKent Overstreet static inline struct page *readpage_iter_next(struct readpages_iter *iter) 6661c6fdbd8SKent Overstreet { 6671c6fdbd8SKent Overstreet if (iter->idx >= iter->nr_pages) 6681c6fdbd8SKent Overstreet return NULL; 6691c6fdbd8SKent Overstreet 6701c6fdbd8SKent Overstreet EBUG_ON(iter->pages[iter->idx]->index != iter->offset + iter->idx); 6711c6fdbd8SKent Overstreet 6721c6fdbd8SKent Overstreet return iter->pages[iter->idx]; 6731c6fdbd8SKent Overstreet } 6741c6fdbd8SKent Overstreet 6751c6fdbd8SKent Overstreet static void bch2_add_page_sectors(struct bio *bio, struct bkey_s_c k) 6761c6fdbd8SKent Overstreet { 6771c6fdbd8SKent Overstreet struct bvec_iter iter; 6781c6fdbd8SKent Overstreet struct bio_vec bv; 67976426098SKent Overstreet unsigned nr_ptrs = k.k->type == KEY_TYPE_reflink_v 6804de77495SKent Overstreet ? 0 : bch2_bkey_nr_ptrs_fully_allocated(k); 6812ba5d38bSKent Overstreet unsigned state = k.k->type == KEY_TYPE_reservation 6822ba5d38bSKent Overstreet ? SECTOR_RESERVED 6832ba5d38bSKent Overstreet : SECTOR_ALLOCATED; 6841c6fdbd8SKent Overstreet 6851c6fdbd8SKent Overstreet bio_for_each_segment(bv, bio, iter) { 686f57a6a5dSKent Overstreet struct bch_page_state *s = bch2_page_state(bv.bv_page); 687f57a6a5dSKent Overstreet unsigned i; 688f81b648dSKent Overstreet 689f57a6a5dSKent Overstreet for (i = bv.bv_offset >> 9; 690f57a6a5dSKent Overstreet i < (bv.bv_offset + bv.bv_len) >> 9; 691f57a6a5dSKent Overstreet i++) { 692f57a6a5dSKent Overstreet s->s[i].nr_replicas = nr_ptrs; 6932ba5d38bSKent Overstreet s->s[i].state = state; 694f57a6a5dSKent Overstreet } 6951c6fdbd8SKent Overstreet } 6961c6fdbd8SKent Overstreet } 6971c6fdbd8SKent Overstreet 69835189e09SKent Overstreet static bool extent_partial_reads_expensive(struct bkey_s_c k) 69935189e09SKent Overstreet { 70035189e09SKent Overstreet struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k); 70135189e09SKent Overstreet struct bch_extent_crc_unpacked crc; 70235189e09SKent Overstreet const union bch_extent_entry *i; 70335189e09SKent Overstreet 70435189e09SKent Overstreet bkey_for_each_crc(k.k, ptrs, crc, i) 70535189e09SKent Overstreet if (crc.csum_type || crc.compression_type) 70635189e09SKent Overstreet return true; 70735189e09SKent Overstreet return false; 70835189e09SKent Overstreet } 70935189e09SKent Overstreet 7101c6fdbd8SKent Overstreet static void readpage_bio_extend(struct readpages_iter *iter, 71176426098SKent Overstreet struct bio *bio, 71276426098SKent Overstreet unsigned sectors_this_extent, 7131c6fdbd8SKent Overstreet bool get_more) 7141c6fdbd8SKent Overstreet { 71576426098SKent Overstreet while (bio_sectors(bio) < sectors_this_extent && 7161c6fdbd8SKent Overstreet bio->bi_vcnt < bio->bi_max_vecs) { 7171c6fdbd8SKent Overstreet pgoff_t page_offset = bio_end_sector(bio) >> PAGE_SECTOR_SHIFT; 7181c6fdbd8SKent Overstreet struct page *page = readpage_iter_next(iter); 7191c6fdbd8SKent Overstreet int ret; 7201c6fdbd8SKent Overstreet 7211c6fdbd8SKent Overstreet if (page) { 7221c6fdbd8SKent Overstreet if (iter->offset + iter->idx != page_offset) 7231c6fdbd8SKent Overstreet break; 7241c6fdbd8SKent Overstreet 7251c6fdbd8SKent Overstreet iter->idx++; 7261c6fdbd8SKent Overstreet } else { 7271c6fdbd8SKent Overstreet if (!get_more) 7281c6fdbd8SKent Overstreet break; 7291c6fdbd8SKent Overstreet 7301c6fdbd8SKent Overstreet page = xa_load(&iter->mapping->i_pages, page_offset); 7311c6fdbd8SKent Overstreet if (page && !xa_is_value(page)) 7321c6fdbd8SKent Overstreet break; 7331c6fdbd8SKent Overstreet 7341c6fdbd8SKent Overstreet page = __page_cache_alloc(readahead_gfp_mask(iter->mapping)); 7351c6fdbd8SKent Overstreet if (!page) 7361c6fdbd8SKent Overstreet break; 7371c6fdbd8SKent Overstreet 738f57a6a5dSKent Overstreet if (!__bch2_page_state_create(page, 0)) { 739f57a6a5dSKent Overstreet put_page(page); 740f57a6a5dSKent Overstreet break; 741f57a6a5dSKent Overstreet } 7421c6fdbd8SKent Overstreet 7431c6fdbd8SKent Overstreet ret = add_to_page_cache_lru(page, iter->mapping, 7441c6fdbd8SKent Overstreet page_offset, GFP_NOFS); 7451c6fdbd8SKent Overstreet if (ret) { 746f57a6a5dSKent Overstreet __bch2_page_state_release(page); 7471c6fdbd8SKent Overstreet put_page(page); 7481c6fdbd8SKent Overstreet break; 7491c6fdbd8SKent Overstreet } 7501c6fdbd8SKent Overstreet 7511c6fdbd8SKent Overstreet put_page(page); 7521c6fdbd8SKent Overstreet } 7531c6fdbd8SKent Overstreet 754885678f6SKent Overstreet BUG_ON(!bio_add_page(bio, page, PAGE_SIZE, 0)); 7551c6fdbd8SKent Overstreet } 7561c6fdbd8SKent Overstreet } 7571c6fdbd8SKent Overstreet 7580f238367SKent Overstreet static void bchfs_read(struct btree_trans *trans, struct btree_iter *iter, 7591c6fdbd8SKent Overstreet struct bch_read_bio *rbio, u64 inum, 7601c6fdbd8SKent Overstreet struct readpages_iter *readpages_iter) 7611c6fdbd8SKent Overstreet { 7620f238367SKent Overstreet struct bch_fs *c = trans->c; 76335189e09SKent Overstreet struct bkey_on_stack sk; 7641c6fdbd8SKent Overstreet int flags = BCH_READ_RETRY_IF_STALE| 7651c6fdbd8SKent Overstreet BCH_READ_MAY_PROMOTE; 76676426098SKent Overstreet int ret = 0; 7671c6fdbd8SKent Overstreet 7681c6fdbd8SKent Overstreet rbio->c = c; 7691c6fdbd8SKent Overstreet rbio->start_time = local_clock(); 77035189e09SKent Overstreet 77135189e09SKent Overstreet bkey_on_stack_init(&sk); 77276426098SKent Overstreet retry: 7731c6fdbd8SKent Overstreet while (1) { 7741c6fdbd8SKent Overstreet struct bkey_s_c k; 77576426098SKent Overstreet unsigned bytes, sectors, offset_into_extent; 7761c6fdbd8SKent Overstreet 77706ed8558SKent Overstreet bch2_btree_iter_set_pos(iter, 77806ed8558SKent Overstreet POS(inum, rbio->bio.bi_iter.bi_sector)); 7791c6fdbd8SKent Overstreet 7801c6fdbd8SKent Overstreet k = bch2_btree_iter_peek_slot(iter); 78176426098SKent Overstreet ret = bkey_err(k); 78276426098SKent Overstreet if (ret) 78376426098SKent Overstreet break; 7841c6fdbd8SKent Overstreet 7855934a0caSKent Overstreet bkey_on_stack_reassemble(&sk, c, k); 78635189e09SKent Overstreet k = bkey_i_to_s_c(sk.k); 7871c6fdbd8SKent Overstreet 78806ed8558SKent Overstreet offset_into_extent = iter->pos.offset - 78906ed8558SKent Overstreet bkey_start_offset(k.k); 79076426098SKent Overstreet sectors = k.k->size - offset_into_extent; 79176426098SKent Overstreet 7923fb5ebcdSKent Overstreet ret = bch2_read_indirect_extent(trans, 79322d8a33dSYuxuan Shui &offset_into_extent, &sk); 79476426098SKent Overstreet if (ret) 79576426098SKent Overstreet break; 79676426098SKent Overstreet 79776426098SKent Overstreet sectors = min(sectors, k.k->size - offset_into_extent); 79876426098SKent Overstreet 79976426098SKent Overstreet bch2_trans_unlock(trans); 80006ed8558SKent Overstreet 80135189e09SKent Overstreet if (readpages_iter) 80235189e09SKent Overstreet readpage_bio_extend(readpages_iter, &rbio->bio, sectors, 80335189e09SKent Overstreet extent_partial_reads_expensive(k)); 8041c6fdbd8SKent Overstreet 80576426098SKent Overstreet bytes = min(sectors, bio_sectors(&rbio->bio)) << 9; 80606ed8558SKent Overstreet swap(rbio->bio.bi_iter.bi_size, bytes); 8071c6fdbd8SKent Overstreet 80806ed8558SKent Overstreet if (rbio->bio.bi_iter.bi_size == bytes) 8091c6fdbd8SKent Overstreet flags |= BCH_READ_LAST_FRAGMENT; 8101c6fdbd8SKent Overstreet 8111c6fdbd8SKent Overstreet if (bkey_extent_is_allocation(k.k)) 81206ed8558SKent Overstreet bch2_add_page_sectors(&rbio->bio, k); 8131c6fdbd8SKent Overstreet 81406ed8558SKent Overstreet bch2_read_extent(c, rbio, k, offset_into_extent, flags); 8151c6fdbd8SKent Overstreet 8161c6fdbd8SKent Overstreet if (flags & BCH_READ_LAST_FRAGMENT) 81735189e09SKent Overstreet break; 8181c6fdbd8SKent Overstreet 81906ed8558SKent Overstreet swap(rbio->bio.bi_iter.bi_size, bytes); 82006ed8558SKent Overstreet bio_advance(&rbio->bio, bytes); 8211c6fdbd8SKent Overstreet } 82276426098SKent Overstreet 82376426098SKent Overstreet if (ret == -EINTR) 82476426098SKent Overstreet goto retry; 82576426098SKent Overstreet 82635189e09SKent Overstreet if (ret) { 82776426098SKent Overstreet bcache_io_error(c, &rbio->bio, "btree IO error %i", ret); 82876426098SKent Overstreet bio_endio(&rbio->bio); 8291c6fdbd8SKent Overstreet } 8301c6fdbd8SKent Overstreet 83135189e09SKent Overstreet bkey_on_stack_exit(&sk, c); 83235189e09SKent Overstreet } 83335189e09SKent Overstreet 8341c6fdbd8SKent Overstreet void bch2_readahead(struct readahead_control *ractl) 8351c6fdbd8SKent Overstreet { 8361c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(ractl->mapping->host); 8371c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 8389a3df993SKent Overstreet struct bch_io_opts opts = io_opts(c, &inode->ei_inode); 839424eb881SKent Overstreet struct btree_trans trans; 840424eb881SKent Overstreet struct btree_iter *iter; 8411c6fdbd8SKent Overstreet struct page *page; 8421c6fdbd8SKent Overstreet struct readpages_iter readpages_iter; 8431c6fdbd8SKent Overstreet int ret; 8441c6fdbd8SKent Overstreet 8451c6fdbd8SKent Overstreet ret = readpages_iter_init(&readpages_iter, ractl); 8461c6fdbd8SKent Overstreet BUG_ON(ret); 8471c6fdbd8SKent Overstreet 84820bceecbSKent Overstreet bch2_trans_init(&trans, c, 0, 0); 849424eb881SKent Overstreet 850424eb881SKent Overstreet iter = bch2_trans_get_iter(&trans, BTREE_ID_EXTENTS, POS_MIN, 8511c6fdbd8SKent Overstreet BTREE_ITER_SLOTS); 8521c6fdbd8SKent Overstreet 8531c6fdbd8SKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 8541c6fdbd8SKent Overstreet 8551c6fdbd8SKent Overstreet while ((page = readpage_iter_next(&readpages_iter))) { 8561c6fdbd8SKent Overstreet pgoff_t index = readpages_iter.offset + readpages_iter.idx; 8571c6fdbd8SKent Overstreet unsigned n = min_t(unsigned, 8581c6fdbd8SKent Overstreet readpages_iter.nr_pages - 8591c6fdbd8SKent Overstreet readpages_iter.idx, 8601c6fdbd8SKent Overstreet BIO_MAX_VECS); 8611c6fdbd8SKent Overstreet struct bch_read_bio *rbio = 8621c6fdbd8SKent Overstreet rbio_init(bio_alloc_bioset(NULL, n, REQ_OP_READ, 8631c6fdbd8SKent Overstreet GFP_NOFS, &c->bio_read), 8641c6fdbd8SKent Overstreet opts); 8651c6fdbd8SKent Overstreet 8661c6fdbd8SKent Overstreet readpages_iter.idx++; 8671c6fdbd8SKent Overstreet 8681c6fdbd8SKent Overstreet rbio->bio.bi_iter.bi_sector = (sector_t) index << PAGE_SECTOR_SHIFT; 8691c6fdbd8SKent Overstreet rbio->bio.bi_end_io = bch2_readpages_end_io; 870885678f6SKent Overstreet BUG_ON(!bio_add_page(&rbio->bio, page, PAGE_SIZE, 0)); 8711c6fdbd8SKent Overstreet 8720f238367SKent Overstreet bchfs_read(&trans, iter, rbio, inode->v.i_ino, 8730f238367SKent Overstreet &readpages_iter); 8741c6fdbd8SKent Overstreet } 8751c6fdbd8SKent Overstreet 8761c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 877424eb881SKent Overstreet 878424eb881SKent Overstreet bch2_trans_exit(&trans); 8791c6fdbd8SKent Overstreet kfree(readpages_iter.pages); 8801c6fdbd8SKent Overstreet } 8811c6fdbd8SKent Overstreet 8821c6fdbd8SKent Overstreet static void __bchfs_readpage(struct bch_fs *c, struct bch_read_bio *rbio, 8831c6fdbd8SKent Overstreet u64 inum, struct page *page) 8841c6fdbd8SKent Overstreet { 885424eb881SKent Overstreet struct btree_trans trans; 886424eb881SKent Overstreet struct btree_iter *iter; 8871c6fdbd8SKent Overstreet 888f57a6a5dSKent Overstreet bch2_page_state_create(page, __GFP_NOFAIL); 8891c6fdbd8SKent Overstreet 8901c6fdbd8SKent Overstreet rbio->bio.bi_opf = REQ_OP_READ|REQ_SYNC; 8917f5e31e1SKent Overstreet rbio->bio.bi_iter.bi_sector = 8927f5e31e1SKent Overstreet (sector_t) page->index << PAGE_SECTOR_SHIFT; 8937f5e31e1SKent Overstreet BUG_ON(!bio_add_page(&rbio->bio, page, PAGE_SIZE, 0)); 8941c6fdbd8SKent Overstreet 89520bceecbSKent Overstreet bch2_trans_init(&trans, c, 0, 0); 896424eb881SKent Overstreet iter = bch2_trans_get_iter(&trans, BTREE_ID_EXTENTS, POS_MIN, 8971c6fdbd8SKent Overstreet BTREE_ITER_SLOTS); 898424eb881SKent Overstreet 8990f238367SKent Overstreet bchfs_read(&trans, iter, rbio, inum, NULL); 900424eb881SKent Overstreet 901424eb881SKent Overstreet bch2_trans_exit(&trans); 9021c6fdbd8SKent Overstreet } 9031c6fdbd8SKent Overstreet 9041c6fdbd8SKent Overstreet static void bch2_read_single_page_end_io(struct bio *bio) 9051c6fdbd8SKent Overstreet { 9061c6fdbd8SKent Overstreet complete(bio->bi_private); 9071c6fdbd8SKent Overstreet } 9081c6fdbd8SKent Overstreet 9091c6fdbd8SKent Overstreet static int bch2_read_single_page(struct page *page, 9101c6fdbd8SKent Overstreet struct address_space *mapping) 9111c6fdbd8SKent Overstreet { 9121c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(mapping->host); 9131c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 9141c6fdbd8SKent Overstreet struct bch_read_bio *rbio; 9151c6fdbd8SKent Overstreet int ret; 9161c6fdbd8SKent Overstreet DECLARE_COMPLETION_ONSTACK(done); 9171c6fdbd8SKent Overstreet 9181c6fdbd8SKent Overstreet rbio = rbio_init(bio_alloc_bioset(NULL, 1, REQ_OP_READ, GFP_NOFS, &c->bio_read), 9199a3df993SKent Overstreet io_opts(c, &inode->ei_inode)); 9201c6fdbd8SKent Overstreet rbio->bio.bi_private = &done; 9211c6fdbd8SKent Overstreet rbio->bio.bi_end_io = bch2_read_single_page_end_io; 9221c6fdbd8SKent Overstreet 9231c6fdbd8SKent Overstreet __bchfs_readpage(c, rbio, inode->v.i_ino, page); 9241c6fdbd8SKent Overstreet wait_for_completion(&done); 9251c6fdbd8SKent Overstreet 9261c6fdbd8SKent Overstreet ret = blk_status_to_errno(rbio->bio.bi_status); 9271c6fdbd8SKent Overstreet bio_put(&rbio->bio); 9281c6fdbd8SKent Overstreet 9291c6fdbd8SKent Overstreet if (ret < 0) 9301c6fdbd8SKent Overstreet return ret; 9311c6fdbd8SKent Overstreet 9321c6fdbd8SKent Overstreet SetPageUptodate(page); 9331c6fdbd8SKent Overstreet return 0; 9341c6fdbd8SKent Overstreet } 9351c6fdbd8SKent Overstreet 9361c6fdbd8SKent Overstreet int bch2_read_folio(struct file *file, struct folio *folio) 9371c6fdbd8SKent Overstreet { 9381c6fdbd8SKent Overstreet struct page *page = &folio->page; 9391c6fdbd8SKent Overstreet int ret; 9401c6fdbd8SKent Overstreet 9411c6fdbd8SKent Overstreet ret = bch2_read_single_page(page, page->mapping); 9421c6fdbd8SKent Overstreet folio_unlock(folio); 9431c6fdbd8SKent Overstreet return ret; 9441c6fdbd8SKent Overstreet } 9451c6fdbd8SKent Overstreet 9461c6fdbd8SKent Overstreet /* writepages: */ 9471c6fdbd8SKent Overstreet 9481c6fdbd8SKent Overstreet struct bch_writepage_state { 9491c6fdbd8SKent Overstreet struct bch_writepage_io *io; 9501c6fdbd8SKent Overstreet struct bch_io_opts opts; 9511c6fdbd8SKent Overstreet }; 9521c6fdbd8SKent Overstreet 9531c6fdbd8SKent Overstreet static inline struct bch_writepage_state bch_writepage_state_init(struct bch_fs *c, 9541c6fdbd8SKent Overstreet struct bch_inode_info *inode) 9551c6fdbd8SKent Overstreet { 9569a3df993SKent Overstreet return (struct bch_writepage_state) { 9579a3df993SKent Overstreet .opts = io_opts(c, &inode->ei_inode) 9589a3df993SKent Overstreet }; 9591c6fdbd8SKent Overstreet } 9601c6fdbd8SKent Overstreet 9611c6fdbd8SKent Overstreet static void bch2_writepage_io_free(struct closure *cl) 9621c6fdbd8SKent Overstreet { 9631c6fdbd8SKent Overstreet struct bch_writepage_io *io = container_of(cl, 9641c6fdbd8SKent Overstreet struct bch_writepage_io, cl); 9651c6fdbd8SKent Overstreet 9669a3df993SKent Overstreet bio_put(&io->op.wbio.bio); 9671c6fdbd8SKent Overstreet } 9681c6fdbd8SKent Overstreet 9691c6fdbd8SKent Overstreet static void bch2_writepage_io_done(struct closure *cl) 9701c6fdbd8SKent Overstreet { 9711c6fdbd8SKent Overstreet struct bch_writepage_io *io = container_of(cl, 9721c6fdbd8SKent Overstreet struct bch_writepage_io, cl); 9739a3df993SKent Overstreet struct bch_fs *c = io->op.c; 9749a3df993SKent Overstreet struct bio *bio = &io->op.wbio.bio; 9751c6fdbd8SKent Overstreet struct bvec_iter_all iter; 9761c6fdbd8SKent Overstreet struct bio_vec *bvec; 977b3fce09cSKent Overstreet unsigned i; 9781c6fdbd8SKent Overstreet 9799a3df993SKent Overstreet if (io->op.error) { 98075812e70SKent Overstreet bio_for_each_segment_all(bvec, bio, iter) { 981b3fce09cSKent Overstreet struct bch_page_state *s; 982b3fce09cSKent Overstreet 9831c6fdbd8SKent Overstreet SetPageError(bvec->bv_page); 98475812e70SKent Overstreet mapping_set_error(bvec->bv_page->mapping, -EIO); 985b3fce09cSKent Overstreet 9863826ee0bSKent Overstreet s = __bch2_page_state(bvec->bv_page); 9873826ee0bSKent Overstreet spin_lock(&s->lock); 988b3fce09cSKent Overstreet for (i = 0; i < PAGE_SECTORS; i++) 989b3fce09cSKent Overstreet s->s[i].nr_replicas = 0; 9903826ee0bSKent Overstreet spin_unlock(&s->lock); 99175812e70SKent Overstreet } 9921c6fdbd8SKent Overstreet } 9931c6fdbd8SKent Overstreet 9944be1a412SKent Overstreet if (io->op.flags & BCH_WRITE_WROTE_DATA_INLINE) { 9954be1a412SKent Overstreet bio_for_each_segment_all(bvec, bio, iter) { 9964be1a412SKent Overstreet struct bch_page_state *s; 9974be1a412SKent Overstreet 9984be1a412SKent Overstreet s = __bch2_page_state(bvec->bv_page); 9994be1a412SKent Overstreet spin_lock(&s->lock); 10004be1a412SKent Overstreet for (i = 0; i < PAGE_SECTORS; i++) 10014be1a412SKent Overstreet s->s[i].nr_replicas = 0; 10024be1a412SKent Overstreet spin_unlock(&s->lock); 10034be1a412SKent Overstreet } 10044be1a412SKent Overstreet } 10054be1a412SKent Overstreet 10061c6fdbd8SKent Overstreet /* 10071c6fdbd8SKent Overstreet * racing with fallocate can cause us to add fewer sectors than 10081c6fdbd8SKent Overstreet * expected - but we shouldn't add more sectors than expected: 10091c6fdbd8SKent Overstreet */ 10109a3df993SKent Overstreet BUG_ON(io->op.i_sectors_delta > 0); 10111c6fdbd8SKent Overstreet 10121c6fdbd8SKent Overstreet /* 10131c6fdbd8SKent Overstreet * (error (due to going RO) halfway through a page can screw that up 10141c6fdbd8SKent Overstreet * slightly) 10151c6fdbd8SKent Overstreet * XXX wtf? 10169a3df993SKent Overstreet BUG_ON(io->op.op.i_sectors_delta >= PAGE_SECTORS); 10171c6fdbd8SKent Overstreet */ 10181c6fdbd8SKent Overstreet 10191c6fdbd8SKent Overstreet /* 10201c6fdbd8SKent Overstreet * PageWriteback is effectively our ref on the inode - fixup i_blocks 10211c6fdbd8SKent Overstreet * before calling end_page_writeback: 10221c6fdbd8SKent Overstreet */ 10239a3df993SKent Overstreet i_sectors_acct(c, io->inode, NULL, io->op.i_sectors_delta); 10241c6fdbd8SKent Overstreet 10257f5e31e1SKent Overstreet bio_for_each_segment_all(bvec, bio, iter) { 10267f5e31e1SKent Overstreet struct bch_page_state *s = __bch2_page_state(bvec->bv_page); 10277f5e31e1SKent Overstreet 10287f5e31e1SKent Overstreet if (atomic_dec_and_test(&s->write_count)) 10291c6fdbd8SKent Overstreet end_page_writeback(bvec->bv_page); 10307f5e31e1SKent Overstreet } 10311c6fdbd8SKent Overstreet 10321c6fdbd8SKent Overstreet closure_return_with_destructor(&io->cl, bch2_writepage_io_free); 10331c6fdbd8SKent Overstreet } 10341c6fdbd8SKent Overstreet 10351c6fdbd8SKent Overstreet static void bch2_writepage_do_io(struct bch_writepage_state *w) 10361c6fdbd8SKent Overstreet { 10371c6fdbd8SKent Overstreet struct bch_writepage_io *io = w->io; 10381c6fdbd8SKent Overstreet 10391c6fdbd8SKent Overstreet w->io = NULL; 10409a3df993SKent Overstreet closure_call(&io->op.cl, bch2_write, NULL, &io->cl); 10411c6fdbd8SKent Overstreet continue_at(&io->cl, bch2_writepage_io_done, NULL); 10421c6fdbd8SKent Overstreet } 10431c6fdbd8SKent Overstreet 10441c6fdbd8SKent Overstreet /* 10451c6fdbd8SKent Overstreet * Get a bch_writepage_io and add @page to it - appending to an existing one if 10461c6fdbd8SKent Overstreet * possible, else allocating a new one: 10471c6fdbd8SKent Overstreet */ 10481c6fdbd8SKent Overstreet static void bch2_writepage_io_alloc(struct bch_fs *c, 104950fe5bd6SKent Overstreet struct writeback_control *wbc, 10501c6fdbd8SKent Overstreet struct bch_writepage_state *w, 10511c6fdbd8SKent Overstreet struct bch_inode_info *inode, 10527f5e31e1SKent Overstreet u64 sector, 10531c6fdbd8SKent Overstreet unsigned nr_replicas) 10541c6fdbd8SKent Overstreet { 10551c6fdbd8SKent Overstreet struct bch_write_op *op; 10561c6fdbd8SKent Overstreet 10571c6fdbd8SKent Overstreet w->io = container_of(bio_alloc_bioset(NULL, BIO_MAX_VECS, 10581c6fdbd8SKent Overstreet REQ_OP_WRITE, 10591c6fdbd8SKent Overstreet GFP_NOFS, 10601c6fdbd8SKent Overstreet &c->writepage_bioset), 10619a3df993SKent Overstreet struct bch_writepage_io, op.wbio.bio); 10621c6fdbd8SKent Overstreet 10631c6fdbd8SKent Overstreet closure_init(&w->io->cl, NULL); 10649a3df993SKent Overstreet w->io->inode = inode; 10659a3df993SKent Overstreet 10669a3df993SKent Overstreet op = &w->io->op; 10679a3df993SKent Overstreet bch2_write_op_init(op, c, w->opts); 10689a3df993SKent Overstreet op->target = w->opts.foreground_target; 10699a3df993SKent Overstreet op_journal_seq_set(op, &inode->ei_journal_seq); 10701c6fdbd8SKent Overstreet op->nr_replicas = nr_replicas; 10711c6fdbd8SKent Overstreet op->res.nr_replicas = nr_replicas; 10721c6fdbd8SKent Overstreet op->write_point = writepoint_hashed(inode->ei_last_dirtied); 10737f5e31e1SKent Overstreet op->pos = POS(inode->v.i_ino, sector); 10747f5e31e1SKent Overstreet op->wbio.bio.bi_iter.bi_sector = sector; 107550fe5bd6SKent Overstreet op->wbio.bio.bi_opf = wbc_to_write_flags(wbc); 10761c6fdbd8SKent Overstreet } 10771c6fdbd8SKent Overstreet 10781c6fdbd8SKent Overstreet static int __bch2_writepage(struct folio *folio, 10791c6fdbd8SKent Overstreet struct writeback_control *wbc, 10801c6fdbd8SKent Overstreet void *data) 10811c6fdbd8SKent Overstreet { 10821c6fdbd8SKent Overstreet struct page *page = &folio->page; 10831c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(page->mapping->host); 10841c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 10851c6fdbd8SKent Overstreet struct bch_writepage_state *w = data; 10867f5e31e1SKent Overstreet struct bch_page_state *s, orig; 10877f5e31e1SKent Overstreet unsigned i, offset, nr_replicas_this_write = U32_MAX; 10881c6fdbd8SKent Overstreet loff_t i_size = i_size_read(&inode->v); 10891c6fdbd8SKent Overstreet pgoff_t end_index = i_size >> PAGE_SHIFT; 1090e1036a2aSKent Overstreet int ret; 10911c6fdbd8SKent Overstreet 10921c6fdbd8SKent Overstreet EBUG_ON(!PageUptodate(page)); 10931c6fdbd8SKent Overstreet 10941c6fdbd8SKent Overstreet /* Is the page fully inside i_size? */ 10951c6fdbd8SKent Overstreet if (page->index < end_index) 10961c6fdbd8SKent Overstreet goto do_io; 10971c6fdbd8SKent Overstreet 10981c6fdbd8SKent Overstreet /* Is the page fully outside i_size? (truncate in progress) */ 10991c6fdbd8SKent Overstreet offset = i_size & (PAGE_SIZE - 1); 11001c6fdbd8SKent Overstreet if (page->index > end_index || !offset) { 11011c6fdbd8SKent Overstreet unlock_page(page); 11021c6fdbd8SKent Overstreet return 0; 11031c6fdbd8SKent Overstreet } 11041c6fdbd8SKent Overstreet 11051c6fdbd8SKent Overstreet /* 11061c6fdbd8SKent Overstreet * The page straddles i_size. It must be zeroed out on each and every 11071c6fdbd8SKent Overstreet * writepage invocation because it may be mmapped. "A file is mapped 11081c6fdbd8SKent Overstreet * in multiples of the page size. For a file that is not a multiple of 11091c6fdbd8SKent Overstreet * the page size, the remaining memory is zeroed when mapped, and 11101c6fdbd8SKent Overstreet * writes to that region are not written out to the file." 11111c6fdbd8SKent Overstreet */ 11121c6fdbd8SKent Overstreet zero_user_segment(page, offset, PAGE_SIZE); 11131c6fdbd8SKent Overstreet do_io: 1114f57a6a5dSKent Overstreet s = bch2_page_state_create(page, __GFP_NOFAIL); 1115f81b648dSKent Overstreet 1116f57a6a5dSKent Overstreet ret = bch2_get_page_disk_reservation(c, inode, page, true); 1117e1036a2aSKent Overstreet if (ret) { 1118e1036a2aSKent Overstreet SetPageError(page); 1119e1036a2aSKent Overstreet mapping_set_error(page->mapping, ret); 1120e1036a2aSKent Overstreet unlock_page(page); 1121e1036a2aSKent Overstreet return 0; 1122e1036a2aSKent Overstreet } 1123e1036a2aSKent Overstreet 11247f5e31e1SKent Overstreet /* Before unlocking the page, get copy of reservations: */ 11257f5e31e1SKent Overstreet orig = *s; 11267f5e31e1SKent Overstreet 11277f5e31e1SKent Overstreet for (i = 0; i < PAGE_SECTORS; i++) { 11282ba5d38bSKent Overstreet if (s->s[i].state < SECTOR_DIRTY) 11297f5e31e1SKent Overstreet continue; 11307f5e31e1SKent Overstreet 1131f81b648dSKent Overstreet nr_replicas_this_write = 1132f57a6a5dSKent Overstreet min_t(unsigned, nr_replicas_this_write, 1133f57a6a5dSKent Overstreet s->s[i].nr_replicas + 1134f57a6a5dSKent Overstreet s->s[i].replicas_reserved); 11357f5e31e1SKent Overstreet } 11361c6fdbd8SKent Overstreet 1137f57a6a5dSKent Overstreet for (i = 0; i < PAGE_SECTORS; i++) { 11382ba5d38bSKent Overstreet if (s->s[i].state < SECTOR_DIRTY) 11397f5e31e1SKent Overstreet continue; 11407f5e31e1SKent Overstreet 1141f57a6a5dSKent Overstreet s->s[i].nr_replicas = w->opts.compression 1142f57a6a5dSKent Overstreet ? 0 : nr_replicas_this_write; 1143e1036a2aSKent Overstreet 1144f57a6a5dSKent Overstreet s->s[i].replicas_reserved = 0; 1145f57a6a5dSKent Overstreet s->s[i].state = SECTOR_ALLOCATED; 1146f57a6a5dSKent Overstreet } 11471c6fdbd8SKent Overstreet 11487f5e31e1SKent Overstreet BUG_ON(atomic_read(&s->write_count)); 11497f5e31e1SKent Overstreet atomic_set(&s->write_count, 1); 11507f5e31e1SKent Overstreet 11511c6fdbd8SKent Overstreet BUG_ON(PageWriteback(page)); 11521c6fdbd8SKent Overstreet set_page_writeback(page); 11537f5e31e1SKent Overstreet 11541c6fdbd8SKent Overstreet unlock_page(page); 11551c6fdbd8SKent Overstreet 11567f5e31e1SKent Overstreet offset = 0; 11577f5e31e1SKent Overstreet while (1) { 11587f5e31e1SKent Overstreet unsigned sectors = 1, dirty_sectors = 0, reserved_sectors = 0; 11597f5e31e1SKent Overstreet u64 sector; 11607f5e31e1SKent Overstreet 11617f5e31e1SKent Overstreet while (offset < PAGE_SECTORS && 11622ba5d38bSKent Overstreet orig.s[offset].state < SECTOR_DIRTY) 11637f5e31e1SKent Overstreet offset++; 11647f5e31e1SKent Overstreet 11657f5e31e1SKent Overstreet if (offset == PAGE_SECTORS) 11667f5e31e1SKent Overstreet break; 11677f5e31e1SKent Overstreet 11687f5e31e1SKent Overstreet sector = ((u64) page->index << PAGE_SECTOR_SHIFT) + offset; 11697f5e31e1SKent Overstreet 11707f5e31e1SKent Overstreet while (offset + sectors < PAGE_SECTORS && 11712ba5d38bSKent Overstreet orig.s[offset + sectors].state >= SECTOR_DIRTY) 11727f5e31e1SKent Overstreet sectors++; 11737f5e31e1SKent Overstreet 11747f5e31e1SKent Overstreet for (i = offset; i < offset + sectors; i++) { 11757f5e31e1SKent Overstreet reserved_sectors += orig.s[i].replicas_reserved; 11767f5e31e1SKent Overstreet dirty_sectors += orig.s[i].state == SECTOR_DIRTY; 11777f5e31e1SKent Overstreet } 11787f5e31e1SKent Overstreet 11791c6fdbd8SKent Overstreet if (w->io && 11809a3df993SKent Overstreet (w->io->op.res.nr_replicas != nr_replicas_this_write || 11819a3df993SKent Overstreet bio_full(&w->io->op.wbio.bio, PAGE_SIZE) || 1182f59b3464SKent Overstreet w->io->op.wbio.bio.bi_iter.bi_size + (sectors << 9) >= 1183f59b3464SKent Overstreet (BIO_MAX_VECS * PAGE_SIZE) || 11849a3df993SKent Overstreet bio_end_sector(&w->io->op.wbio.bio) != sector)) 11851c6fdbd8SKent Overstreet bch2_writepage_do_io(w); 11861c6fdbd8SKent Overstreet 11871c6fdbd8SKent Overstreet if (!w->io) 118850fe5bd6SKent Overstreet bch2_writepage_io_alloc(c, wbc, w, inode, sector, 1189f81b648dSKent Overstreet nr_replicas_this_write); 11901c6fdbd8SKent Overstreet 11917f5e31e1SKent Overstreet atomic_inc(&s->write_count); 11927f5e31e1SKent Overstreet 11939a3df993SKent Overstreet BUG_ON(inode != w->io->inode); 11949a3df993SKent Overstreet BUG_ON(!bio_add_page(&w->io->op.wbio.bio, page, 11957f5e31e1SKent Overstreet sectors << 9, offset << 9)); 11961c6fdbd8SKent Overstreet 11976cc3535dSKent Overstreet /* Check for writing past i_size: */ 11989a3df993SKent Overstreet WARN_ON((bio_end_sector(&w->io->op.wbio.bio) << 9) > 11996cc3535dSKent Overstreet round_up(i_size, block_bytes(c))); 12006cc3535dSKent Overstreet 12019a3df993SKent Overstreet w->io->op.res.sectors += reserved_sectors; 12029a3df993SKent Overstreet w->io->op.i_sectors_delta -= dirty_sectors; 12031c6fdbd8SKent Overstreet w->io->op.new_i_size = i_size; 12041c6fdbd8SKent Overstreet 12057f5e31e1SKent Overstreet offset += sectors; 12067f5e31e1SKent Overstreet } 12077f5e31e1SKent Overstreet 12087f5e31e1SKent Overstreet if (atomic_dec_and_test(&s->write_count)) 12097f5e31e1SKent Overstreet end_page_writeback(page); 12107f5e31e1SKent Overstreet 12111c6fdbd8SKent Overstreet return 0; 12121c6fdbd8SKent Overstreet } 12131c6fdbd8SKent Overstreet 12141c6fdbd8SKent Overstreet int bch2_writepages(struct address_space *mapping, struct writeback_control *wbc) 12151c6fdbd8SKent Overstreet { 12161c6fdbd8SKent Overstreet struct bch_fs *c = mapping->host->i_sb->s_fs_info; 12171c6fdbd8SKent Overstreet struct bch_writepage_state w = 12181c6fdbd8SKent Overstreet bch_writepage_state_init(c, to_bch_ei(mapping->host)); 12191c6fdbd8SKent Overstreet struct blk_plug plug; 12201c6fdbd8SKent Overstreet int ret; 12211c6fdbd8SKent Overstreet 12221c6fdbd8SKent Overstreet blk_start_plug(&plug); 12231c6fdbd8SKent Overstreet ret = write_cache_pages(mapping, wbc, __bch2_writepage, &w); 12241c6fdbd8SKent Overstreet if (w.io) 12251c6fdbd8SKent Overstreet bch2_writepage_do_io(&w); 12261c6fdbd8SKent Overstreet blk_finish_plug(&plug); 12271c6fdbd8SKent Overstreet return ret; 12281c6fdbd8SKent Overstreet } 12291c6fdbd8SKent Overstreet 12301c6fdbd8SKent Overstreet int bch2_writepage(struct page *page, struct writeback_control *wbc) 12311c6fdbd8SKent Overstreet { 12321c6fdbd8SKent Overstreet struct bch_fs *c = page->mapping->host->i_sb->s_fs_info; 12331c6fdbd8SKent Overstreet struct bch_writepage_state w = 12341c6fdbd8SKent Overstreet bch_writepage_state_init(c, to_bch_ei(page->mapping->host)); 12351c6fdbd8SKent Overstreet int ret; 12361c6fdbd8SKent Overstreet 12371c6fdbd8SKent Overstreet ret = __bch2_writepage(page_folio(page), wbc, &w); 12381c6fdbd8SKent Overstreet if (w.io) 12391c6fdbd8SKent Overstreet bch2_writepage_do_io(&w); 12401c6fdbd8SKent Overstreet 12411c6fdbd8SKent Overstreet return ret; 12421c6fdbd8SKent Overstreet } 12431c6fdbd8SKent Overstreet 12441c6fdbd8SKent Overstreet /* buffered writes: */ 12451c6fdbd8SKent Overstreet 12461c6fdbd8SKent Overstreet int bch2_write_begin(struct file *file, struct address_space *mapping, 12471c6fdbd8SKent Overstreet loff_t pos, unsigned len, 12481c6fdbd8SKent Overstreet struct page **pagep, void **fsdata) 12491c6fdbd8SKent Overstreet { 12501c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(mapping->host); 12511c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 1252d1542e03SKent Overstreet struct bch2_page_reservation *res; 12531c6fdbd8SKent Overstreet pgoff_t index = pos >> PAGE_SHIFT; 12541c6fdbd8SKent Overstreet unsigned offset = pos & (PAGE_SIZE - 1); 12551c6fdbd8SKent Overstreet struct page *page; 12561c6fdbd8SKent Overstreet int ret = -ENOMEM; 12571c6fdbd8SKent Overstreet 1258d1542e03SKent Overstreet res = kmalloc(sizeof(*res), GFP_KERNEL); 1259d1542e03SKent Overstreet if (!res) 1260d1542e03SKent Overstreet return -ENOMEM; 1261d1542e03SKent Overstreet 1262d1542e03SKent Overstreet bch2_page_reservation_init(c, inode, res); 1263d1542e03SKent Overstreet *fsdata = res; 12641c6fdbd8SKent Overstreet 12651c6fdbd8SKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 12661c6fdbd8SKent Overstreet 12671c6fdbd8SKent Overstreet page = grab_cache_page_write_begin(mapping, index); 12681c6fdbd8SKent Overstreet if (!page) 12691c6fdbd8SKent Overstreet goto err_unlock; 12701c6fdbd8SKent Overstreet 12711c6fdbd8SKent Overstreet if (PageUptodate(page)) 12721c6fdbd8SKent Overstreet goto out; 12731c6fdbd8SKent Overstreet 12741c6fdbd8SKent Overstreet /* If we're writing entire page, don't need to read it in first: */ 12751c6fdbd8SKent Overstreet if (len == PAGE_SIZE) 12761c6fdbd8SKent Overstreet goto out; 12771c6fdbd8SKent Overstreet 12781c6fdbd8SKent Overstreet if (!offset && pos + len >= inode->v.i_size) { 12791c6fdbd8SKent Overstreet zero_user_segment(page, len, PAGE_SIZE); 12801c6fdbd8SKent Overstreet flush_dcache_page(page); 12811c6fdbd8SKent Overstreet goto out; 12821c6fdbd8SKent Overstreet } 12831c6fdbd8SKent Overstreet 12841c6fdbd8SKent Overstreet if (index > inode->v.i_size >> PAGE_SHIFT) { 12851c6fdbd8SKent Overstreet zero_user_segments(page, 0, offset, offset + len, PAGE_SIZE); 12861c6fdbd8SKent Overstreet flush_dcache_page(page); 12871c6fdbd8SKent Overstreet goto out; 12881c6fdbd8SKent Overstreet } 12891c6fdbd8SKent Overstreet readpage: 12901c6fdbd8SKent Overstreet ret = bch2_read_single_page(page, mapping); 12911c6fdbd8SKent Overstreet if (ret) 12921c6fdbd8SKent Overstreet goto err; 12931c6fdbd8SKent Overstreet out: 1294d1542e03SKent Overstreet ret = bch2_page_reservation_get(c, inode, page, res, 1295d1542e03SKent Overstreet offset, len, true); 12961c6fdbd8SKent Overstreet if (ret) { 12971c6fdbd8SKent Overstreet if (!PageUptodate(page)) { 12981c6fdbd8SKent Overstreet /* 12991c6fdbd8SKent Overstreet * If the page hasn't been read in, we won't know if we 13001c6fdbd8SKent Overstreet * actually need a reservation - we don't actually need 13011c6fdbd8SKent Overstreet * to read here, we just need to check if the page is 13021c6fdbd8SKent Overstreet * fully backed by uncompressed data: 13031c6fdbd8SKent Overstreet */ 13041c6fdbd8SKent Overstreet goto readpage; 13051c6fdbd8SKent Overstreet } 13061c6fdbd8SKent Overstreet 13071c6fdbd8SKent Overstreet goto err; 13081c6fdbd8SKent Overstreet } 13091c6fdbd8SKent Overstreet 13101c6fdbd8SKent Overstreet *pagep = page; 13111c6fdbd8SKent Overstreet return 0; 13121c6fdbd8SKent Overstreet err: 13131c6fdbd8SKent Overstreet unlock_page(page); 13141c6fdbd8SKent Overstreet put_page(page); 13151c6fdbd8SKent Overstreet *pagep = NULL; 13161c6fdbd8SKent Overstreet err_unlock: 13171c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 1318d1542e03SKent Overstreet kfree(res); 1319d1542e03SKent Overstreet *fsdata = NULL; 13201c6fdbd8SKent Overstreet return ret; 13211c6fdbd8SKent Overstreet } 13221c6fdbd8SKent Overstreet 13231c6fdbd8SKent Overstreet int bch2_write_end(struct file *file, struct address_space *mapping, 13241c6fdbd8SKent Overstreet loff_t pos, unsigned len, unsigned copied, 13251c6fdbd8SKent Overstreet struct page *page, void *fsdata) 13261c6fdbd8SKent Overstreet { 13271c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(mapping->host); 13281c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 1329d1542e03SKent Overstreet struct bch2_page_reservation *res = fsdata; 1330d1542e03SKent Overstreet unsigned offset = pos & (PAGE_SIZE - 1); 13311c6fdbd8SKent Overstreet 13321c6fdbd8SKent Overstreet lockdep_assert_held(&inode->v.i_rwsem); 13331c6fdbd8SKent Overstreet 13341c6fdbd8SKent Overstreet if (unlikely(copied < len && !PageUptodate(page))) { 13351c6fdbd8SKent Overstreet /* 13361c6fdbd8SKent Overstreet * The page needs to be read in, but that would destroy 13371c6fdbd8SKent Overstreet * our partial write - simplest thing is to just force 13381c6fdbd8SKent Overstreet * userspace to redo the write: 13391c6fdbd8SKent Overstreet */ 13401c6fdbd8SKent Overstreet zero_user(page, 0, PAGE_SIZE); 13411c6fdbd8SKent Overstreet flush_dcache_page(page); 13421c6fdbd8SKent Overstreet copied = 0; 13431c6fdbd8SKent Overstreet } 13441c6fdbd8SKent Overstreet 13451c6fdbd8SKent Overstreet spin_lock(&inode->v.i_lock); 13461c6fdbd8SKent Overstreet if (pos + copied > inode->v.i_size) 13471c6fdbd8SKent Overstreet i_size_write(&inode->v, pos + copied); 13481c6fdbd8SKent Overstreet spin_unlock(&inode->v.i_lock); 13491c6fdbd8SKent Overstreet 13501c6fdbd8SKent Overstreet if (copied) { 13511c6fdbd8SKent Overstreet if (!PageUptodate(page)) 13521c6fdbd8SKent Overstreet SetPageUptodate(page); 1353d1542e03SKent Overstreet 1354d1542e03SKent Overstreet bch2_set_page_dirty(c, inode, page, res, offset, copied); 13551c6fdbd8SKent Overstreet 13561c6fdbd8SKent Overstreet inode->ei_last_dirtied = (unsigned long) current; 13571c6fdbd8SKent Overstreet } 13581c6fdbd8SKent Overstreet 13591c6fdbd8SKent Overstreet unlock_page(page); 13601c6fdbd8SKent Overstreet put_page(page); 13611c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 13621c6fdbd8SKent Overstreet 1363d1542e03SKent Overstreet bch2_page_reservation_put(c, inode, res); 1364d1542e03SKent Overstreet kfree(res); 1365d1542e03SKent Overstreet 13661c6fdbd8SKent Overstreet return copied; 13671c6fdbd8SKent Overstreet } 13681c6fdbd8SKent Overstreet 13691c6fdbd8SKent Overstreet #define WRITE_BATCH_PAGES 32 13701c6fdbd8SKent Overstreet 13711c6fdbd8SKent Overstreet static int __bch2_buffered_write(struct bch_inode_info *inode, 13721c6fdbd8SKent Overstreet struct address_space *mapping, 13731c6fdbd8SKent Overstreet struct iov_iter *iter, 13741c6fdbd8SKent Overstreet loff_t pos, unsigned len) 13751c6fdbd8SKent Overstreet { 13761c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 13771c6fdbd8SKent Overstreet struct page *pages[WRITE_BATCH_PAGES]; 1378d1542e03SKent Overstreet struct bch2_page_reservation res; 13791c6fdbd8SKent Overstreet unsigned long index = pos >> PAGE_SHIFT; 13801c6fdbd8SKent Overstreet unsigned offset = pos & (PAGE_SIZE - 1); 13811c6fdbd8SKent Overstreet unsigned nr_pages = DIV_ROUND_UP(offset + len, PAGE_SIZE); 1382d1542e03SKent Overstreet unsigned i, reserved = 0, set_dirty = 0; 1383d1542e03SKent Overstreet unsigned copied = 0, nr_pages_copied = 0; 13841c6fdbd8SKent Overstreet int ret = 0; 13851c6fdbd8SKent Overstreet 13861c6fdbd8SKent Overstreet BUG_ON(!len); 13871c6fdbd8SKent Overstreet BUG_ON(nr_pages > ARRAY_SIZE(pages)); 13881c6fdbd8SKent Overstreet 1389d1542e03SKent Overstreet bch2_page_reservation_init(c, inode, &res); 1390d1542e03SKent Overstreet 13911c6fdbd8SKent Overstreet for (i = 0; i < nr_pages; i++) { 13921c6fdbd8SKent Overstreet pages[i] = grab_cache_page_write_begin(mapping, index + i); 13931c6fdbd8SKent Overstreet if (!pages[i]) { 13941c6fdbd8SKent Overstreet nr_pages = i; 13958de819f8SKent Overstreet if (!i) { 13961c6fdbd8SKent Overstreet ret = -ENOMEM; 13971c6fdbd8SKent Overstreet goto out; 13981c6fdbd8SKent Overstreet } 13998de819f8SKent Overstreet len = min_t(unsigned, len, 14008de819f8SKent Overstreet nr_pages * PAGE_SIZE - offset); 14018de819f8SKent Overstreet break; 14028de819f8SKent Overstreet } 14031c6fdbd8SKent Overstreet } 14041c6fdbd8SKent Overstreet 14051c6fdbd8SKent Overstreet if (offset && !PageUptodate(pages[0])) { 14061c6fdbd8SKent Overstreet ret = bch2_read_single_page(pages[0], mapping); 14071c6fdbd8SKent Overstreet if (ret) 14081c6fdbd8SKent Overstreet goto out; 14091c6fdbd8SKent Overstreet } 14101c6fdbd8SKent Overstreet 14111c6fdbd8SKent Overstreet if ((pos + len) & (PAGE_SIZE - 1) && 14121c6fdbd8SKent Overstreet !PageUptodate(pages[nr_pages - 1])) { 14131c6fdbd8SKent Overstreet if ((index + nr_pages - 1) << PAGE_SHIFT >= inode->v.i_size) { 14141c6fdbd8SKent Overstreet zero_user(pages[nr_pages - 1], 0, PAGE_SIZE); 14151c6fdbd8SKent Overstreet } else { 14161c6fdbd8SKent Overstreet ret = bch2_read_single_page(pages[nr_pages - 1], mapping); 14171c6fdbd8SKent Overstreet if (ret) 14181c6fdbd8SKent Overstreet goto out; 14191c6fdbd8SKent Overstreet } 14201c6fdbd8SKent Overstreet } 14211c6fdbd8SKent Overstreet 1422d1542e03SKent Overstreet while (reserved < len) { 1423d1542e03SKent Overstreet struct page *page = pages[(offset + reserved) >> PAGE_SHIFT]; 1424d1542e03SKent Overstreet unsigned pg_offset = (offset + reserved) & (PAGE_SIZE - 1); 1425d1542e03SKent Overstreet unsigned pg_len = min_t(unsigned, len - reserved, 1426d1542e03SKent Overstreet PAGE_SIZE - pg_offset); 1427d1542e03SKent Overstreet retry_reservation: 1428d1542e03SKent Overstreet ret = bch2_page_reservation_get(c, inode, page, &res, 1429d1542e03SKent Overstreet pg_offset, pg_len, true); 14301c6fdbd8SKent Overstreet 1431d1542e03SKent Overstreet if (ret && !PageUptodate(page)) { 1432d1542e03SKent Overstreet ret = bch2_read_single_page(page, mapping); 1433d1542e03SKent Overstreet if (!ret) 1434d1542e03SKent Overstreet goto retry_reservation; 14351c6fdbd8SKent Overstreet } 14361c6fdbd8SKent Overstreet 14371c6fdbd8SKent Overstreet if (ret) 14381c6fdbd8SKent Overstreet goto out; 1439d1542e03SKent Overstreet 1440d1542e03SKent Overstreet reserved += pg_len; 14411c6fdbd8SKent Overstreet } 14421c6fdbd8SKent Overstreet 14431c6fdbd8SKent Overstreet if (mapping_writably_mapped(mapping)) 14441c6fdbd8SKent Overstreet for (i = 0; i < nr_pages; i++) 14451c6fdbd8SKent Overstreet flush_dcache_page(pages[i]); 14461c6fdbd8SKent Overstreet 14471c6fdbd8SKent Overstreet while (copied < len) { 14481c6fdbd8SKent Overstreet struct page *page = pages[(offset + copied) >> PAGE_SHIFT]; 14491c6fdbd8SKent Overstreet unsigned pg_offset = (offset + copied) & (PAGE_SIZE - 1); 1450d1542e03SKent Overstreet unsigned pg_len = min_t(unsigned, len - copied, 14511c6fdbd8SKent Overstreet PAGE_SIZE - pg_offset); 14521c6fdbd8SKent Overstreet unsigned pg_copied = copy_page_from_iter_atomic(page, 1453d1542e03SKent Overstreet pg_offset, pg_len, iter); 1454d1542e03SKent Overstreet 1455d1542e03SKent Overstreet if (!pg_copied) 1456d1542e03SKent Overstreet break; 14571c6fdbd8SKent Overstreet 1458912bdf17SKent Overstreet if (!PageUptodate(page) && 1459912bdf17SKent Overstreet pg_copied != PAGE_SIZE && 1460912bdf17SKent Overstreet pos + copied + pg_copied < inode->v.i_size) { 1461912bdf17SKent Overstreet zero_user(page, 0, PAGE_SIZE); 1462912bdf17SKent Overstreet break; 1463912bdf17SKent Overstreet } 1464912bdf17SKent Overstreet 14651c6fdbd8SKent Overstreet flush_dcache_page(page); 14661c6fdbd8SKent Overstreet copied += pg_copied; 1467912bdf17SKent Overstreet 1468912bdf17SKent Overstreet if (pg_copied != pg_len) 1469912bdf17SKent Overstreet break; 14701c6fdbd8SKent Overstreet } 14711c6fdbd8SKent Overstreet 14721c6fdbd8SKent Overstreet if (!copied) 14731c6fdbd8SKent Overstreet goto out; 14741c6fdbd8SKent Overstreet 1475877dfb34SKent Overstreet spin_lock(&inode->v.i_lock); 1476877dfb34SKent Overstreet if (pos + copied > inode->v.i_size) 1477877dfb34SKent Overstreet i_size_write(&inode->v, pos + copied); 1478877dfb34SKent Overstreet spin_unlock(&inode->v.i_lock); 1479877dfb34SKent Overstreet 1480d1542e03SKent Overstreet while (set_dirty < copied) { 1481d1542e03SKent Overstreet struct page *page = pages[(offset + set_dirty) >> PAGE_SHIFT]; 1482d1542e03SKent Overstreet unsigned pg_offset = (offset + set_dirty) & (PAGE_SIZE - 1); 1483d1542e03SKent Overstreet unsigned pg_len = min_t(unsigned, copied - set_dirty, 1484d1542e03SKent Overstreet PAGE_SIZE - pg_offset); 1485d1542e03SKent Overstreet 1486d1542e03SKent Overstreet if (!PageUptodate(page)) 1487d1542e03SKent Overstreet SetPageUptodate(page); 1488d1542e03SKent Overstreet 1489d1542e03SKent Overstreet bch2_set_page_dirty(c, inode, page, &res, pg_offset, pg_len); 1490d1542e03SKent Overstreet unlock_page(page); 1491d1542e03SKent Overstreet put_page(page); 1492d1542e03SKent Overstreet 1493d1542e03SKent Overstreet set_dirty += pg_len; 1494d1542e03SKent Overstreet } 1495877dfb34SKent Overstreet 1496877dfb34SKent Overstreet nr_pages_copied = DIV_ROUND_UP(offset + copied, PAGE_SIZE); 1497877dfb34SKent Overstreet inode->ei_last_dirtied = (unsigned long) current; 14981c6fdbd8SKent Overstreet out: 1499d1542e03SKent Overstreet for (i = nr_pages_copied; i < nr_pages; i++) { 15001c6fdbd8SKent Overstreet unlock_page(pages[i]); 15011c6fdbd8SKent Overstreet put_page(pages[i]); 15021c6fdbd8SKent Overstreet } 15031c6fdbd8SKent Overstreet 1504d1542e03SKent Overstreet bch2_page_reservation_put(c, inode, &res); 15051c6fdbd8SKent Overstreet 15061c6fdbd8SKent Overstreet return copied ?: ret; 15071c6fdbd8SKent Overstreet } 15081c6fdbd8SKent Overstreet 15091c6fdbd8SKent Overstreet static ssize_t bch2_buffered_write(struct kiocb *iocb, struct iov_iter *iter) 15101c6fdbd8SKent Overstreet { 15111c6fdbd8SKent Overstreet struct file *file = iocb->ki_filp; 15121c6fdbd8SKent Overstreet struct address_space *mapping = file->f_mapping; 15131c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 15141c6fdbd8SKent Overstreet loff_t pos = iocb->ki_pos; 15151c6fdbd8SKent Overstreet ssize_t written = 0; 15161c6fdbd8SKent Overstreet int ret = 0; 15171c6fdbd8SKent Overstreet 15181c6fdbd8SKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 15191c6fdbd8SKent Overstreet 15201c6fdbd8SKent Overstreet do { 15211c6fdbd8SKent Overstreet unsigned offset = pos & (PAGE_SIZE - 1); 15221c6fdbd8SKent Overstreet unsigned bytes = min_t(unsigned long, iov_iter_count(iter), 15231c6fdbd8SKent Overstreet PAGE_SIZE * WRITE_BATCH_PAGES - offset); 15241c6fdbd8SKent Overstreet again: 15251c6fdbd8SKent Overstreet /* 15261c6fdbd8SKent Overstreet * Bring in the user page that we will copy from _first_. 15271c6fdbd8SKent Overstreet * Otherwise there's a nasty deadlock on copying from the 15281c6fdbd8SKent Overstreet * same page as we're writing to, without it being marked 15291c6fdbd8SKent Overstreet * up-to-date. 15301c6fdbd8SKent Overstreet * 15311c6fdbd8SKent Overstreet * Not only is this an optimisation, but it is also required 15321c6fdbd8SKent Overstreet * to check that the address is actually valid, when atomic 15331c6fdbd8SKent Overstreet * usercopies are used, below. 15341c6fdbd8SKent Overstreet */ 15351c6fdbd8SKent Overstreet if (unlikely(fault_in_iov_iter_readable(iter, bytes))) { 15361c6fdbd8SKent Overstreet bytes = min_t(unsigned long, iov_iter_count(iter), 15371c6fdbd8SKent Overstreet PAGE_SIZE - offset); 15381c6fdbd8SKent Overstreet 15391c6fdbd8SKent Overstreet if (unlikely(fault_in_iov_iter_readable(iter, bytes))) { 15401c6fdbd8SKent Overstreet ret = -EFAULT; 15411c6fdbd8SKent Overstreet break; 15421c6fdbd8SKent Overstreet } 15431c6fdbd8SKent Overstreet } 15441c6fdbd8SKent Overstreet 15451c6fdbd8SKent Overstreet if (unlikely(fatal_signal_pending(current))) { 15461c6fdbd8SKent Overstreet ret = -EINTR; 15471c6fdbd8SKent Overstreet break; 15481c6fdbd8SKent Overstreet } 15491c6fdbd8SKent Overstreet 15501c6fdbd8SKent Overstreet ret = __bch2_buffered_write(inode, mapping, iter, pos, bytes); 15511c6fdbd8SKent Overstreet if (unlikely(ret < 0)) 15521c6fdbd8SKent Overstreet break; 15531c6fdbd8SKent Overstreet 15541c6fdbd8SKent Overstreet cond_resched(); 15551c6fdbd8SKent Overstreet 15561c6fdbd8SKent Overstreet if (unlikely(ret == 0)) { 15571c6fdbd8SKent Overstreet /* 15581c6fdbd8SKent Overstreet * If we were unable to copy any data at all, we must 15591c6fdbd8SKent Overstreet * fall back to a single segment length write. 15601c6fdbd8SKent Overstreet * 15611c6fdbd8SKent Overstreet * If we didn't fallback here, we could livelock 15621c6fdbd8SKent Overstreet * because not all segments in the iov can be copied at 15631c6fdbd8SKent Overstreet * once without a pagefault. 15641c6fdbd8SKent Overstreet */ 15651c6fdbd8SKent Overstreet bytes = min_t(unsigned long, PAGE_SIZE - offset, 15661c6fdbd8SKent Overstreet iov_iter_single_seg_count(iter)); 15671c6fdbd8SKent Overstreet goto again; 15681c6fdbd8SKent Overstreet } 15691c6fdbd8SKent Overstreet pos += ret; 15701c6fdbd8SKent Overstreet written += ret; 1571912bdf17SKent Overstreet ret = 0; 15721c6fdbd8SKent Overstreet 15731c6fdbd8SKent Overstreet balance_dirty_pages_ratelimited(mapping); 15741c6fdbd8SKent Overstreet } while (iov_iter_count(iter)); 15751c6fdbd8SKent Overstreet 15761c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 15771c6fdbd8SKent Overstreet 15781c6fdbd8SKent Overstreet return written ? written : ret; 15791c6fdbd8SKent Overstreet } 15801c6fdbd8SKent Overstreet 15811c6fdbd8SKent Overstreet /* O_DIRECT reads */ 15821c6fdbd8SKent Overstreet 15831c6fdbd8SKent Overstreet static void bch2_dio_read_complete(struct closure *cl) 15841c6fdbd8SKent Overstreet { 15851c6fdbd8SKent Overstreet struct dio_read *dio = container_of(cl, struct dio_read, cl); 15861c6fdbd8SKent Overstreet 15871c6fdbd8SKent Overstreet dio->req->ki_complete(dio->req, dio->ret); 15881c6fdbd8SKent Overstreet bio_check_pages_dirty(&dio->rbio.bio); /* transfers ownership */ 15891c6fdbd8SKent Overstreet } 15901c6fdbd8SKent Overstreet 15911c6fdbd8SKent Overstreet static void bch2_direct_IO_read_endio(struct bio *bio) 15921c6fdbd8SKent Overstreet { 15931c6fdbd8SKent Overstreet struct dio_read *dio = bio->bi_private; 15941c6fdbd8SKent Overstreet 15951c6fdbd8SKent Overstreet if (bio->bi_status) 15961c6fdbd8SKent Overstreet dio->ret = blk_status_to_errno(bio->bi_status); 15971c6fdbd8SKent Overstreet 15981c6fdbd8SKent Overstreet closure_put(&dio->cl); 15991c6fdbd8SKent Overstreet } 16001c6fdbd8SKent Overstreet 16011c6fdbd8SKent Overstreet static void bch2_direct_IO_read_split_endio(struct bio *bio) 16021c6fdbd8SKent Overstreet { 16031c6fdbd8SKent Overstreet bch2_direct_IO_read_endio(bio); 16041c6fdbd8SKent Overstreet bio_check_pages_dirty(bio); /* transfers ownership */ 16051c6fdbd8SKent Overstreet } 16061c6fdbd8SKent Overstreet 16071c6fdbd8SKent Overstreet static int bch2_direct_IO_read(struct kiocb *req, struct iov_iter *iter) 16081c6fdbd8SKent Overstreet { 16091c6fdbd8SKent Overstreet struct file *file = req->ki_filp; 16101c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 16111c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 16129a3df993SKent Overstreet struct bch_io_opts opts = io_opts(c, &inode->ei_inode); 16131c6fdbd8SKent Overstreet struct dio_read *dio; 16141c6fdbd8SKent Overstreet struct bio *bio; 16151c6fdbd8SKent Overstreet loff_t offset = req->ki_pos; 16161c6fdbd8SKent Overstreet bool sync = is_sync_kiocb(req); 16171c6fdbd8SKent Overstreet size_t shorten; 16181c6fdbd8SKent Overstreet ssize_t ret; 16191c6fdbd8SKent Overstreet 16201c6fdbd8SKent Overstreet if ((offset|iter->count) & (block_bytes(c) - 1)) 16211c6fdbd8SKent Overstreet return -EINVAL; 16221c6fdbd8SKent Overstreet 16231c6fdbd8SKent Overstreet ret = min_t(loff_t, iter->count, 16241c6fdbd8SKent Overstreet max_t(loff_t, 0, i_size_read(&inode->v) - offset)); 16251c6fdbd8SKent Overstreet 16261c6fdbd8SKent Overstreet if (!ret) 16271c6fdbd8SKent Overstreet return ret; 16281c6fdbd8SKent Overstreet 16291c6fdbd8SKent Overstreet shorten = iov_iter_count(iter) - round_up(ret, block_bytes(c)); 16301c6fdbd8SKent Overstreet iter->count -= shorten; 16311c6fdbd8SKent Overstreet 16321c6fdbd8SKent Overstreet bio = bio_alloc_bioset(NULL, 16331c6fdbd8SKent Overstreet iov_iter_npages(iter, BIO_MAX_VECS), 16341c6fdbd8SKent Overstreet REQ_OP_READ, 16351c6fdbd8SKent Overstreet GFP_KERNEL, 16361c6fdbd8SKent Overstreet &c->dio_read_bioset); 16371c6fdbd8SKent Overstreet 16381c6fdbd8SKent Overstreet bio->bi_end_io = bch2_direct_IO_read_endio; 16391c6fdbd8SKent Overstreet 16401c6fdbd8SKent Overstreet dio = container_of(bio, struct dio_read, rbio.bio); 16411c6fdbd8SKent Overstreet closure_init(&dio->cl, NULL); 16421c6fdbd8SKent Overstreet 16431c6fdbd8SKent Overstreet /* 16441c6fdbd8SKent Overstreet * this is a _really_ horrible hack just to avoid an atomic sub at the 16451c6fdbd8SKent Overstreet * end: 16461c6fdbd8SKent Overstreet */ 16471c6fdbd8SKent Overstreet if (!sync) { 16481c6fdbd8SKent Overstreet set_closure_fn(&dio->cl, bch2_dio_read_complete, NULL); 16491c6fdbd8SKent Overstreet atomic_set(&dio->cl.remaining, 16501c6fdbd8SKent Overstreet CLOSURE_REMAINING_INITIALIZER - 16511c6fdbd8SKent Overstreet CLOSURE_RUNNING + 16521c6fdbd8SKent Overstreet CLOSURE_DESTRUCTOR); 16531c6fdbd8SKent Overstreet } else { 16541c6fdbd8SKent Overstreet atomic_set(&dio->cl.remaining, 16551c6fdbd8SKent Overstreet CLOSURE_REMAINING_INITIALIZER + 1); 16561c6fdbd8SKent Overstreet } 16571c6fdbd8SKent Overstreet 16581c6fdbd8SKent Overstreet dio->req = req; 16591c6fdbd8SKent Overstreet dio->ret = ret; 16601c6fdbd8SKent Overstreet 16611c6fdbd8SKent Overstreet goto start; 16621c6fdbd8SKent Overstreet while (iter->count) { 16631c6fdbd8SKent Overstreet bio = bio_alloc_bioset(NULL, 16641c6fdbd8SKent Overstreet iov_iter_npages(iter, BIO_MAX_VECS), 16651c6fdbd8SKent Overstreet REQ_OP_READ, 16661c6fdbd8SKent Overstreet GFP_KERNEL, 16671c6fdbd8SKent Overstreet &c->bio_read); 16681c6fdbd8SKent Overstreet bio->bi_end_io = bch2_direct_IO_read_split_endio; 16691c6fdbd8SKent Overstreet start: 16701c6fdbd8SKent Overstreet bio->bi_opf = REQ_OP_READ|REQ_SYNC; 16711c6fdbd8SKent Overstreet bio->bi_iter.bi_sector = offset >> 9; 16721c6fdbd8SKent Overstreet bio->bi_private = dio; 16731c6fdbd8SKent Overstreet 16741c6fdbd8SKent Overstreet ret = bio_iov_iter_get_pages(bio, iter); 16751c6fdbd8SKent Overstreet if (ret < 0) { 16761c6fdbd8SKent Overstreet /* XXX: fault inject this path */ 16771c6fdbd8SKent Overstreet bio->bi_status = BLK_STS_RESOURCE; 16781c6fdbd8SKent Overstreet bio_endio(bio); 16791c6fdbd8SKent Overstreet break; 16801c6fdbd8SKent Overstreet } 16811c6fdbd8SKent Overstreet 16821c6fdbd8SKent Overstreet offset += bio->bi_iter.bi_size; 16831c6fdbd8SKent Overstreet bio_set_pages_dirty(bio); 16841c6fdbd8SKent Overstreet 16851c6fdbd8SKent Overstreet if (iter->count) 16861c6fdbd8SKent Overstreet closure_get(&dio->cl); 16871c6fdbd8SKent Overstreet 16881c6fdbd8SKent Overstreet bch2_read(c, rbio_init(bio, opts), inode->v.i_ino); 16891c6fdbd8SKent Overstreet } 16901c6fdbd8SKent Overstreet 16911c6fdbd8SKent Overstreet iter->count += shorten; 16921c6fdbd8SKent Overstreet 16931c6fdbd8SKent Overstreet if (sync) { 16941c6fdbd8SKent Overstreet closure_sync(&dio->cl); 16951c6fdbd8SKent Overstreet closure_debug_destroy(&dio->cl); 16961c6fdbd8SKent Overstreet ret = dio->ret; 16971c6fdbd8SKent Overstreet bio_check_pages_dirty(&dio->rbio.bio); /* transfers ownership */ 16981c6fdbd8SKent Overstreet return ret; 16991c6fdbd8SKent Overstreet } else { 17001c6fdbd8SKent Overstreet return -EIOCBQUEUED; 17011c6fdbd8SKent Overstreet } 17021c6fdbd8SKent Overstreet } 17031c6fdbd8SKent Overstreet 17041c6fdbd8SKent Overstreet ssize_t bch2_read_iter(struct kiocb *iocb, struct iov_iter *iter) 17051c6fdbd8SKent Overstreet { 17061c6fdbd8SKent Overstreet struct file *file = iocb->ki_filp; 17071c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 17081c6fdbd8SKent Overstreet struct address_space *mapping = file->f_mapping; 17091c6fdbd8SKent Overstreet size_t count = iov_iter_count(iter); 17101c6fdbd8SKent Overstreet ssize_t ret; 17111c6fdbd8SKent Overstreet 17121c6fdbd8SKent Overstreet if (!count) 17131c6fdbd8SKent Overstreet return 0; /* skip atime */ 17141c6fdbd8SKent Overstreet 17151c6fdbd8SKent Overstreet if (iocb->ki_flags & IOCB_DIRECT) { 17161c6fdbd8SKent Overstreet struct blk_plug plug; 17171c6fdbd8SKent Overstreet 1718a023127aSKent Overstreet if (unlikely(mapping->nrpages)) { 17191c6fdbd8SKent Overstreet ret = filemap_write_and_wait_range(mapping, 17201c6fdbd8SKent Overstreet iocb->ki_pos, 17211c6fdbd8SKent Overstreet iocb->ki_pos + count - 1); 17221c6fdbd8SKent Overstreet if (ret < 0) 17231c6fdbd8SKent Overstreet return ret; 1724a023127aSKent Overstreet } 17251c6fdbd8SKent Overstreet 17261c6fdbd8SKent Overstreet file_accessed(file); 17271c6fdbd8SKent Overstreet 17281c6fdbd8SKent Overstreet blk_start_plug(&plug); 17291c6fdbd8SKent Overstreet ret = bch2_direct_IO_read(iocb, iter); 17301c6fdbd8SKent Overstreet blk_finish_plug(&plug); 17311c6fdbd8SKent Overstreet 17321c6fdbd8SKent Overstreet if (ret >= 0) 17331c6fdbd8SKent Overstreet iocb->ki_pos += ret; 17341c6fdbd8SKent Overstreet } else { 17351c6fdbd8SKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 17361c6fdbd8SKent Overstreet ret = generic_file_read_iter(iocb, iter); 17371c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 17381c6fdbd8SKent Overstreet } 17391c6fdbd8SKent Overstreet 17401c6fdbd8SKent Overstreet return ret; 17411c6fdbd8SKent Overstreet } 17421c6fdbd8SKent Overstreet 17431c6fdbd8SKent Overstreet /* O_DIRECT writes */ 17441c6fdbd8SKent Overstreet 17451c6fdbd8SKent Overstreet /* 17461c6fdbd8SKent Overstreet * We're going to return -EIOCBQUEUED, but we haven't finished consuming the 17471c6fdbd8SKent Overstreet * iov_iter yet, so we need to stash a copy of the iovec: it might be on the 17481c6fdbd8SKent Overstreet * caller's stack, we're not guaranteed that it will live for the duration of 17491c6fdbd8SKent Overstreet * the IO: 17501c6fdbd8SKent Overstreet */ 17511c6fdbd8SKent Overstreet static noinline int bch2_dio_write_copy_iov(struct dio_write *dio) 17521c6fdbd8SKent Overstreet { 17531c6fdbd8SKent Overstreet struct iovec *iov = dio->inline_vecs; 17541c6fdbd8SKent Overstreet 17551c6fdbd8SKent Overstreet /* 17561c6fdbd8SKent Overstreet * iov_iter has a single embedded iovec - nothing to do: 17571c6fdbd8SKent Overstreet */ 17581c6fdbd8SKent Overstreet if (iter_is_ubuf(&dio->iter)) 17591c6fdbd8SKent Overstreet return 0; 17601c6fdbd8SKent Overstreet 17611c6fdbd8SKent Overstreet /* 17621c6fdbd8SKent Overstreet * We don't currently handle non-iovec iov_iters here - return an error, 17631c6fdbd8SKent Overstreet * and we'll fall back to doing the IO synchronously: 17641c6fdbd8SKent Overstreet */ 17651c6fdbd8SKent Overstreet if (!iter_is_iovec(&dio->iter)) 17661c6fdbd8SKent Overstreet return -1; 17671c6fdbd8SKent Overstreet 17681c6fdbd8SKent Overstreet if (dio->iter.nr_segs > ARRAY_SIZE(dio->inline_vecs)) { 17691c6fdbd8SKent Overstreet iov = kmalloc_array(dio->iter.nr_segs, sizeof(*iov), 17701c6fdbd8SKent Overstreet GFP_KERNEL); 17711c6fdbd8SKent Overstreet if (unlikely(!iov)) 17721c6fdbd8SKent Overstreet return -ENOMEM; 17731c6fdbd8SKent Overstreet 17741c6fdbd8SKent Overstreet dio->free_iov = true; 17751c6fdbd8SKent Overstreet } 17761c6fdbd8SKent Overstreet 17771c6fdbd8SKent Overstreet memcpy(iov, dio->iter.__iov, dio->iter.nr_segs * sizeof(*iov)); 17781c6fdbd8SKent Overstreet dio->iter.__iov = iov; 17791c6fdbd8SKent Overstreet return 0; 17801c6fdbd8SKent Overstreet } 17811c6fdbd8SKent Overstreet 1782042a1f26SKent Overstreet static void bch2_dio_write_loop_async(struct bch_write_op *); 1783042a1f26SKent Overstreet 17841c6fdbd8SKent Overstreet static long bch2_dio_write_loop(struct dio_write *dio) 17851c6fdbd8SKent Overstreet { 1786ed484030SKent Overstreet bool kthread = (current->flags & PF_KTHREAD) != 0; 17871c6fdbd8SKent Overstreet struct kiocb *req = dio->req; 17881c6fdbd8SKent Overstreet struct address_space *mapping = req->ki_filp->f_mapping; 17899a3df993SKent Overstreet struct bch_inode_info *inode = file_bch_inode(req->ki_filp); 1790042a1f26SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 17919a3df993SKent Overstreet struct bio *bio = &dio->op.wbio.bio; 17921c6fdbd8SKent Overstreet struct bvec_iter_all iter; 17931c6fdbd8SKent Overstreet struct bio_vec *bv; 17940a426c32SKent Overstreet unsigned unaligned; 1795286d8ad0SKent Overstreet bool sync = dio->sync; 17961c6fdbd8SKent Overstreet long ret; 17971c6fdbd8SKent Overstreet 17981c6fdbd8SKent Overstreet if (dio->loop) 17991c6fdbd8SKent Overstreet goto loop; 18001c6fdbd8SKent Overstreet 18011c6fdbd8SKent Overstreet while (1) { 1802ed484030SKent Overstreet if (kthread) 1803ed484030SKent Overstreet kthread_use_mm(dio->mm); 18041c6fdbd8SKent Overstreet BUG_ON(current->faults_disabled_mapping); 18051c6fdbd8SKent Overstreet current->faults_disabled_mapping = mapping; 18061c6fdbd8SKent Overstreet 18071c6fdbd8SKent Overstreet ret = bio_iov_iter_get_pages(bio, &dio->iter); 18081c6fdbd8SKent Overstreet 18091c6fdbd8SKent Overstreet current->faults_disabled_mapping = NULL; 1810ed484030SKent Overstreet if (kthread) 1811ed484030SKent Overstreet kthread_unuse_mm(dio->mm); 18121c6fdbd8SKent Overstreet 18131c6fdbd8SKent Overstreet if (unlikely(ret < 0)) 18141c6fdbd8SKent Overstreet goto err; 18151c6fdbd8SKent Overstreet 18160a426c32SKent Overstreet unaligned = bio->bi_iter.bi_size & (block_bytes(c) - 1); 18170a426c32SKent Overstreet bio->bi_iter.bi_size -= unaligned; 18180a426c32SKent Overstreet iov_iter_revert(&dio->iter, unaligned); 18190a426c32SKent Overstreet 18200a426c32SKent Overstreet if (!bio->bi_iter.bi_size) { 18210a426c32SKent Overstreet /* 18220a426c32SKent Overstreet * bio_iov_iter_get_pages was only able to get < 18230a426c32SKent Overstreet * blocksize worth of pages: 18240a426c32SKent Overstreet */ 18250a426c32SKent Overstreet bio_for_each_segment_all(bv, bio, iter) 18260a426c32SKent Overstreet put_page(bv->bv_page); 18270a426c32SKent Overstreet ret = -EFAULT; 18280a426c32SKent Overstreet goto err; 18290a426c32SKent Overstreet } 18300a426c32SKent Overstreet 1831042a1f26SKent Overstreet bch2_write_op_init(&dio->op, c, io_opts(c, &inode->ei_inode)); 1832042a1f26SKent Overstreet dio->op.end_io = bch2_dio_write_loop_async; 1833042a1f26SKent Overstreet dio->op.target = dio->op.opts.foreground_target; 1834042a1f26SKent Overstreet op_journal_seq_set(&dio->op, &inode->ei_journal_seq); 1835042a1f26SKent Overstreet dio->op.write_point = writepoint_hashed((unsigned long) current); 1836042a1f26SKent Overstreet dio->op.nr_replicas = dio->op.opts.data_replicas; 1837042a1f26SKent Overstreet dio->op.pos = POS(inode->v.i_ino, (u64) req->ki_pos >> 9); 1838042a1f26SKent Overstreet 1839042a1f26SKent Overstreet if ((req->ki_flags & IOCB_DSYNC) && 1840042a1f26SKent Overstreet !c->opts.journal_flush_disabled) 1841042a1f26SKent Overstreet dio->op.flags |= BCH_WRITE_FLUSH; 1842042a1f26SKent Overstreet 1843042a1f26SKent Overstreet ret = bch2_disk_reservation_get(c, &dio->op.res, bio_sectors(bio), 1844042a1f26SKent Overstreet dio->op.opts.data_replicas, 0); 1845042a1f26SKent Overstreet if (unlikely(ret) && 1846042a1f26SKent Overstreet !bch2_check_range_allocated(c, dio->op.pos, 1847042a1f26SKent Overstreet bio_sectors(bio), dio->op.opts.data_replicas)) 1848042a1f26SKent Overstreet goto err; 18491c6fdbd8SKent Overstreet 18501c6fdbd8SKent Overstreet task_io_account_write(bio->bi_iter.bi_size); 18511c6fdbd8SKent Overstreet 18521c6fdbd8SKent Overstreet if (!dio->sync && !dio->loop && dio->iter.count) { 18531c6fdbd8SKent Overstreet if (bch2_dio_write_copy_iov(dio)) { 1854286d8ad0SKent Overstreet dio->sync = sync = true; 1855f8f30863SKent Overstreet goto do_io; 18561c6fdbd8SKent Overstreet } 18571c6fdbd8SKent Overstreet } 1858f8f30863SKent Overstreet do_io: 18591c6fdbd8SKent Overstreet dio->loop = true; 1860f8f30863SKent Overstreet closure_call(&dio->op.cl, bch2_write, NULL, NULL); 18611c6fdbd8SKent Overstreet 1862286d8ad0SKent Overstreet if (sync) 1863f8f30863SKent Overstreet wait_for_completion(&dio->done); 1864f8f30863SKent Overstreet else 18651c6fdbd8SKent Overstreet return -EIOCBQUEUED; 18661c6fdbd8SKent Overstreet loop: 18679a3df993SKent Overstreet i_sectors_acct(c, inode, &dio->quota_res, 18689a3df993SKent Overstreet dio->op.i_sectors_delta); 1869042a1f26SKent Overstreet req->ki_pos += (u64) dio->op.written << 9; 1870042a1f26SKent Overstreet dio->written += dio->op.written; 18719a3df993SKent Overstreet 18729a3df993SKent Overstreet spin_lock(&inode->v.i_lock); 1873042a1f26SKent Overstreet if (req->ki_pos > inode->v.i_size) 1874042a1f26SKent Overstreet i_size_write(&inode->v, req->ki_pos); 18759a3df993SKent Overstreet spin_unlock(&inode->v.i_lock); 18769a3df993SKent Overstreet 18771c6fdbd8SKent Overstreet bio_for_each_segment_all(bv, bio, iter) 18781c6fdbd8SKent Overstreet put_page(bv->bv_page); 18799a3df993SKent Overstreet if (!dio->iter.count || dio->op.error) 18801c6fdbd8SKent Overstreet break; 1881f8f30863SKent Overstreet 18821c6fdbd8SKent Overstreet bio_reset(bio, NULL, REQ_OP_WRITE); 1883f8f30863SKent Overstreet reinit_completion(&dio->done); 18841c6fdbd8SKent Overstreet } 18851c6fdbd8SKent Overstreet 1886042a1f26SKent Overstreet ret = dio->op.error ?: ((long) dio->written << 9); 18871c6fdbd8SKent Overstreet err: 18881c6fdbd8SKent Overstreet bch2_pagecache_block_put(&inode->ei_pagecache_lock); 18890a426c32SKent Overstreet bch2_quota_reservation_put(c, inode, &dio->quota_res); 18901c6fdbd8SKent Overstreet 18911c6fdbd8SKent Overstreet if (dio->free_iov) 18921c6fdbd8SKent Overstreet kfree(dio->iter.__iov); 18931c6fdbd8SKent Overstreet 18941c6fdbd8SKent Overstreet bio_put(bio); 18951c6fdbd8SKent Overstreet 18961c6fdbd8SKent Overstreet /* inode->i_dio_count is our ref on inode and thus bch_fs */ 18971c6fdbd8SKent Overstreet inode_dio_end(&inode->v); 18981c6fdbd8SKent Overstreet 18991c6fdbd8SKent Overstreet if (!sync) { 19001c6fdbd8SKent Overstreet req->ki_complete(req, ret); 19011c6fdbd8SKent Overstreet ret = -EIOCBQUEUED; 19021c6fdbd8SKent Overstreet } 19031c6fdbd8SKent Overstreet return ret; 19041c6fdbd8SKent Overstreet } 19051c6fdbd8SKent Overstreet 1906f8f30863SKent Overstreet static void bch2_dio_write_loop_async(struct bch_write_op *op) 19071c6fdbd8SKent Overstreet { 1908f8f30863SKent Overstreet struct dio_write *dio = container_of(op, struct dio_write, op); 19091c6fdbd8SKent Overstreet 1910f8f30863SKent Overstreet if (dio->sync) 1911f8f30863SKent Overstreet complete(&dio->done); 1912f8f30863SKent Overstreet else 19131c6fdbd8SKent Overstreet bch2_dio_write_loop(dio); 19141c6fdbd8SKent Overstreet } 19151c6fdbd8SKent Overstreet 19161c6fdbd8SKent Overstreet static noinline 19171c6fdbd8SKent Overstreet ssize_t bch2_direct_write(struct kiocb *req, struct iov_iter *iter) 19181c6fdbd8SKent Overstreet { 19191c6fdbd8SKent Overstreet struct file *file = req->ki_filp; 192054847d25SKent Overstreet struct address_space *mapping = file->f_mapping; 19211c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 19221c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 19231c6fdbd8SKent Overstreet struct dio_write *dio; 19241c6fdbd8SKent Overstreet struct bio *bio; 19257edcfbfeSKent Overstreet bool locked = true, extending; 19261c6fdbd8SKent Overstreet ssize_t ret; 19271c6fdbd8SKent Overstreet 19287edcfbfeSKent Overstreet prefetch(&c->opts); 19297edcfbfeSKent Overstreet prefetch((void *) &c->opts + 64); 19307edcfbfeSKent Overstreet prefetch(&inode->ei_inode); 19317edcfbfeSKent Overstreet prefetch((void *) &inode->ei_inode + 64); 19321c6fdbd8SKent Overstreet 19337edcfbfeSKent Overstreet inode_lock(&inode->v); 19347edcfbfeSKent Overstreet 19357edcfbfeSKent Overstreet ret = generic_write_checks(req, iter); 19367edcfbfeSKent Overstreet if (unlikely(ret <= 0)) 19377edcfbfeSKent Overstreet goto err; 19387edcfbfeSKent Overstreet 19397edcfbfeSKent Overstreet ret = file_remove_privs(file); 19407edcfbfeSKent Overstreet if (unlikely(ret)) 19417edcfbfeSKent Overstreet goto err; 19427edcfbfeSKent Overstreet 19437edcfbfeSKent Overstreet ret = file_update_time(file); 19447edcfbfeSKent Overstreet if (unlikely(ret)) 19457edcfbfeSKent Overstreet goto err; 19461c6fdbd8SKent Overstreet 1947919dbbd1SKent Overstreet if (unlikely((req->ki_pos|iter->count) & (block_bytes(c) - 1))) 19487edcfbfeSKent Overstreet goto err; 19497edcfbfeSKent Overstreet 19507edcfbfeSKent Overstreet inode_dio_begin(&inode->v); 19517edcfbfeSKent Overstreet bch2_pagecache_block_get(&inode->ei_pagecache_lock); 19527edcfbfeSKent Overstreet 19537edcfbfeSKent Overstreet extending = req->ki_pos + iter->count > inode->v.i_size; 19547edcfbfeSKent Overstreet if (!extending) { 19557edcfbfeSKent Overstreet inode_unlock(&inode->v); 19567edcfbfeSKent Overstreet locked = false; 19577edcfbfeSKent Overstreet } 19581c6fdbd8SKent Overstreet 19591c6fdbd8SKent Overstreet bio = bio_alloc_bioset(NULL, 19601c6fdbd8SKent Overstreet iov_iter_npages(iter, BIO_MAX_VECS), 19611c6fdbd8SKent Overstreet REQ_OP_WRITE, 19621c6fdbd8SKent Overstreet GFP_KERNEL, 19631c6fdbd8SKent Overstreet &c->dio_write_bioset); 19649a3df993SKent Overstreet dio = container_of(bio, struct dio_write, op.wbio.bio); 1965f8f30863SKent Overstreet init_completion(&dio->done); 19661c6fdbd8SKent Overstreet dio->req = req; 1967ed484030SKent Overstreet dio->mm = current->mm; 19681c6fdbd8SKent Overstreet dio->loop = false; 19697edcfbfeSKent Overstreet dio->sync = is_sync_kiocb(req) || extending; 19701c6fdbd8SKent Overstreet dio->free_iov = false; 19711c6fdbd8SKent Overstreet dio->quota_res.sectors = 0; 1972042a1f26SKent Overstreet dio->written = 0; 19731c6fdbd8SKent Overstreet dio->iter = *iter; 19749a3df993SKent Overstreet 19751c6fdbd8SKent Overstreet ret = bch2_quota_reservation_add(c, inode, &dio->quota_res, 19761c6fdbd8SKent Overstreet iter->count >> 9, true); 19771c6fdbd8SKent Overstreet if (unlikely(ret)) 19787edcfbfeSKent Overstreet goto err_put_bio; 19791c6fdbd8SKent Overstreet 1980a023127aSKent Overstreet if (unlikely(mapping->nrpages)) { 198154847d25SKent Overstreet ret = write_invalidate_inode_pages_range(mapping, 198254847d25SKent Overstreet req->ki_pos, 198354847d25SKent Overstreet req->ki_pos + iter->count - 1); 198454847d25SKent Overstreet if (unlikely(ret)) 198554847d25SKent Overstreet goto err_put_bio; 1986a023127aSKent Overstreet } 198754847d25SKent Overstreet 19887edcfbfeSKent Overstreet ret = bch2_dio_write_loop(dio); 19891c6fdbd8SKent Overstreet err: 19907edcfbfeSKent Overstreet if (locked) 19917edcfbfeSKent Overstreet inode_unlock(&inode->v); 19927edcfbfeSKent Overstreet return ret; 19937edcfbfeSKent Overstreet err_put_bio: 19947edcfbfeSKent Overstreet bch2_pagecache_block_put(&inode->ei_pagecache_lock); 19951c6fdbd8SKent Overstreet bch2_quota_reservation_put(c, inode, &dio->quota_res); 19961c6fdbd8SKent Overstreet bio_put(bio); 19977edcfbfeSKent Overstreet inode_dio_end(&inode->v); 19987edcfbfeSKent Overstreet goto err; 19991c6fdbd8SKent Overstreet } 20001c6fdbd8SKent Overstreet 20017edcfbfeSKent Overstreet ssize_t bch2_write_iter(struct kiocb *iocb, struct iov_iter *from) 20021c6fdbd8SKent Overstreet { 20031c6fdbd8SKent Overstreet struct file *file = iocb->ki_filp; 20047edcfbfeSKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 20051c6fdbd8SKent Overstreet ssize_t ret; 20061c6fdbd8SKent Overstreet 20071c6fdbd8SKent Overstreet if (iocb->ki_flags & IOCB_DIRECT) 20081c6fdbd8SKent Overstreet return bch2_direct_write(iocb, from); 20091c6fdbd8SKent Overstreet 20107edcfbfeSKent Overstreet inode_lock(&inode->v); 20117edcfbfeSKent Overstreet 20127edcfbfeSKent Overstreet ret = generic_write_checks(iocb, from); 20137edcfbfeSKent Overstreet if (ret <= 0) 20147edcfbfeSKent Overstreet goto unlock; 20157edcfbfeSKent Overstreet 20161c6fdbd8SKent Overstreet ret = file_remove_privs(file); 20171c6fdbd8SKent Overstreet if (ret) 20187edcfbfeSKent Overstreet goto unlock; 20191c6fdbd8SKent Overstreet 20201c6fdbd8SKent Overstreet ret = file_update_time(file); 20211c6fdbd8SKent Overstreet if (ret) 20227edcfbfeSKent Overstreet goto unlock; 20231c6fdbd8SKent Overstreet 20247edcfbfeSKent Overstreet ret = bch2_buffered_write(iocb, from); 20251c6fdbd8SKent Overstreet if (likely(ret > 0)) 20261c6fdbd8SKent Overstreet iocb->ki_pos += ret; 20277edcfbfeSKent Overstreet unlock: 20281c6fdbd8SKent Overstreet inode_unlock(&inode->v); 20291c6fdbd8SKent Overstreet 20307edcfbfeSKent Overstreet if (ret > 0) 20311c6fdbd8SKent Overstreet ret = generic_write_sync(iocb, ret); 20321c6fdbd8SKent Overstreet 20331c6fdbd8SKent Overstreet return ret; 20341c6fdbd8SKent Overstreet } 20351c6fdbd8SKent Overstreet 20361c6fdbd8SKent Overstreet /* fsync: */ 20371c6fdbd8SKent Overstreet 20381c6fdbd8SKent Overstreet int bch2_fsync(struct file *file, loff_t start, loff_t end, int datasync) 20391c6fdbd8SKent Overstreet { 20401c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 20411c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 2042bb1b3658SKent Overstreet int ret, ret2; 20431c6fdbd8SKent Overstreet 20441c6fdbd8SKent Overstreet ret = file_write_and_wait_range(file, start, end); 20451c6fdbd8SKent Overstreet if (ret) 20461c6fdbd8SKent Overstreet return ret; 20471c6fdbd8SKent Overstreet 20481c6fdbd8SKent Overstreet if (datasync && !(inode->v.i_state & I_DIRTY_DATASYNC)) 20491c6fdbd8SKent Overstreet goto out; 20501c6fdbd8SKent Overstreet 20511c6fdbd8SKent Overstreet ret = sync_inode_metadata(&inode->v, 1); 20521c6fdbd8SKent Overstreet if (ret) 20531c6fdbd8SKent Overstreet return ret; 20541c6fdbd8SKent Overstreet out: 205575812e70SKent Overstreet if (!c->opts.journal_flush_disabled) 205675812e70SKent Overstreet ret = bch2_journal_flush_seq(&c->journal, 205775812e70SKent Overstreet inode->ei_journal_seq); 2058bb1b3658SKent Overstreet ret2 = file_check_and_advance_wb_err(file); 2059bb1b3658SKent Overstreet 2060bb1b3658SKent Overstreet return ret ?: ret2; 20611c6fdbd8SKent Overstreet } 20621c6fdbd8SKent Overstreet 20631c6fdbd8SKent Overstreet /* truncate: */ 20641c6fdbd8SKent Overstreet 20651c6fdbd8SKent Overstreet static inline int range_has_data(struct bch_fs *c, 20661c6fdbd8SKent Overstreet struct bpos start, 20671c6fdbd8SKent Overstreet struct bpos end) 20681c6fdbd8SKent Overstreet { 2069424eb881SKent Overstreet struct btree_trans trans; 2070424eb881SKent Overstreet struct btree_iter *iter; 20711c6fdbd8SKent Overstreet struct bkey_s_c k; 20721c6fdbd8SKent Overstreet int ret = 0; 20731c6fdbd8SKent Overstreet 207420bceecbSKent Overstreet bch2_trans_init(&trans, c, 0, 0); 2075424eb881SKent Overstreet 207694f651e2SKent Overstreet for_each_btree_key(&trans, iter, BTREE_ID_EXTENTS, start, 0, k, ret) { 20771c6fdbd8SKent Overstreet if (bkey_cmp(bkey_start_pos(k.k), end) >= 0) 20781c6fdbd8SKent Overstreet break; 20791c6fdbd8SKent Overstreet 20801c6fdbd8SKent Overstreet if (bkey_extent_is_data(k.k)) { 20811c6fdbd8SKent Overstreet ret = 1; 20821c6fdbd8SKent Overstreet break; 20831c6fdbd8SKent Overstreet } 20841c6fdbd8SKent Overstreet } 20851c6fdbd8SKent Overstreet 2086424eb881SKent Overstreet return bch2_trans_exit(&trans) ?: ret; 20871c6fdbd8SKent Overstreet } 20881c6fdbd8SKent Overstreet 20891c6fdbd8SKent Overstreet static int __bch2_truncate_page(struct bch_inode_info *inode, 20901c6fdbd8SKent Overstreet pgoff_t index, loff_t start, loff_t end) 20911c6fdbd8SKent Overstreet { 20921c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 20931c6fdbd8SKent Overstreet struct address_space *mapping = inode->v.i_mapping; 2094a99b1cafSKent Overstreet struct bch_page_state *s; 20951c6fdbd8SKent Overstreet unsigned start_offset = start & (PAGE_SIZE - 1); 20961c6fdbd8SKent Overstreet unsigned end_offset = ((end - 1) & (PAGE_SIZE - 1)) + 1; 2097a99b1cafSKent Overstreet unsigned i; 20981c6fdbd8SKent Overstreet struct page *page; 20991c6fdbd8SKent Overstreet int ret = 0; 21001c6fdbd8SKent Overstreet 21011c6fdbd8SKent Overstreet /* Page boundary? Nothing to do */ 21021c6fdbd8SKent Overstreet if (!((index == start >> PAGE_SHIFT && start_offset) || 21031c6fdbd8SKent Overstreet (index == end >> PAGE_SHIFT && end_offset != PAGE_SIZE))) 21041c6fdbd8SKent Overstreet return 0; 21051c6fdbd8SKent Overstreet 21061c6fdbd8SKent Overstreet /* Above i_size? */ 21071c6fdbd8SKent Overstreet if (index << PAGE_SHIFT >= inode->v.i_size) 21081c6fdbd8SKent Overstreet return 0; 21091c6fdbd8SKent Overstreet 21101c6fdbd8SKent Overstreet page = find_lock_page(mapping, index); 21111c6fdbd8SKent Overstreet if (!page) { 21121c6fdbd8SKent Overstreet /* 21131c6fdbd8SKent Overstreet * XXX: we're doing two index lookups when we end up reading the 21141c6fdbd8SKent Overstreet * page 21151c6fdbd8SKent Overstreet */ 21161c6fdbd8SKent Overstreet ret = range_has_data(c, 21171c6fdbd8SKent Overstreet POS(inode->v.i_ino, index << PAGE_SECTOR_SHIFT), 21181c6fdbd8SKent Overstreet POS(inode->v.i_ino, (index + 1) << PAGE_SECTOR_SHIFT)); 21191c6fdbd8SKent Overstreet if (ret <= 0) 21201c6fdbd8SKent Overstreet return ret; 21211c6fdbd8SKent Overstreet 21221c6fdbd8SKent Overstreet page = find_or_create_page(mapping, index, GFP_KERNEL); 21231c6fdbd8SKent Overstreet if (unlikely(!page)) { 21241c6fdbd8SKent Overstreet ret = -ENOMEM; 21251c6fdbd8SKent Overstreet goto out; 21261c6fdbd8SKent Overstreet } 21271c6fdbd8SKent Overstreet } 21281c6fdbd8SKent Overstreet 2129a99b1cafSKent Overstreet s = bch2_page_state_create(page, 0); 2130a99b1cafSKent Overstreet if (!s) { 2131a99b1cafSKent Overstreet ret = -ENOMEM; 2132a99b1cafSKent Overstreet goto unlock; 2133a99b1cafSKent Overstreet } 2134a99b1cafSKent Overstreet 21351c6fdbd8SKent Overstreet if (!PageUptodate(page)) { 21361c6fdbd8SKent Overstreet ret = bch2_read_single_page(page, mapping); 21371c6fdbd8SKent Overstreet if (ret) 21381c6fdbd8SKent Overstreet goto unlock; 21391c6fdbd8SKent Overstreet } 21401c6fdbd8SKent Overstreet 2141a99b1cafSKent Overstreet if (index != start >> PAGE_SHIFT) 2142a99b1cafSKent Overstreet start_offset = 0; 2143a99b1cafSKent Overstreet if (index != end >> PAGE_SHIFT) 2144a99b1cafSKent Overstreet end_offset = PAGE_SIZE; 2145a99b1cafSKent Overstreet 2146a99b1cafSKent Overstreet for (i = round_up(start_offset, block_bytes(c)) >> 9; 2147a99b1cafSKent Overstreet i < round_down(end_offset, block_bytes(c)) >> 9; 2148a99b1cafSKent Overstreet i++) { 2149a99b1cafSKent Overstreet s->s[i].nr_replicas = 0; 2150a99b1cafSKent Overstreet s->s[i].state = SECTOR_UNALLOCATED; 2151a99b1cafSKent Overstreet } 2152a99b1cafSKent Overstreet 2153a99b1cafSKent Overstreet zero_user_segment(page, start_offset, end_offset); 2154a99b1cafSKent Overstreet 21551c6fdbd8SKent Overstreet /* 21561c6fdbd8SKent Overstreet * Bit of a hack - we don't want truncate to fail due to -ENOSPC. 21571c6fdbd8SKent Overstreet * 21581c6fdbd8SKent Overstreet * XXX: because we aren't currently tracking whether the page has actual 21591c6fdbd8SKent Overstreet * data in it (vs. just 0s, or only partially written) this wrong. ick. 21601c6fdbd8SKent Overstreet */ 2161d1542e03SKent Overstreet ret = bch2_get_page_disk_reservation(c, inode, page, false); 21621c6fdbd8SKent Overstreet BUG_ON(ret); 21631c6fdbd8SKent Overstreet 2164*9ba2eb25SKent Overstreet /* 2165*9ba2eb25SKent Overstreet * This removes any writeable userspace mappings; we need to force 2166*9ba2eb25SKent Overstreet * .page_mkwrite to be called again before any mmapped writes, to 2167*9ba2eb25SKent Overstreet * redirty the full page: 2168*9ba2eb25SKent Overstreet */ 2169*9ba2eb25SKent Overstreet page_mkclean(page); 2170d1542e03SKent Overstreet filemap_dirty_folio(mapping, page_folio(page)); 21711c6fdbd8SKent Overstreet unlock: 21721c6fdbd8SKent Overstreet unlock_page(page); 21731c6fdbd8SKent Overstreet put_page(page); 21741c6fdbd8SKent Overstreet out: 21751c6fdbd8SKent Overstreet return ret; 21761c6fdbd8SKent Overstreet } 21771c6fdbd8SKent Overstreet 21781c6fdbd8SKent Overstreet static int bch2_truncate_page(struct bch_inode_info *inode, loff_t from) 21791c6fdbd8SKent Overstreet { 21801c6fdbd8SKent Overstreet return __bch2_truncate_page(inode, from >> PAGE_SHIFT, 2181a99b1cafSKent Overstreet from, round_up(from, PAGE_SIZE)); 21821c6fdbd8SKent Overstreet } 21831c6fdbd8SKent Overstreet 2184e0541a93SKent Overstreet static int bch2_extend(struct bch_inode_info *inode, 2185e0541a93SKent Overstreet struct bch_inode_unpacked *inode_u, 2186e0541a93SKent Overstreet struct iattr *iattr) 21871c6fdbd8SKent Overstreet { 21881c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 21891c6fdbd8SKent Overstreet struct address_space *mapping = inode->v.i_mapping; 21901c6fdbd8SKent Overstreet int ret; 21911c6fdbd8SKent Overstreet 2192e0541a93SKent Overstreet /* 2193e0541a93SKent Overstreet * sync appends: 21942925fc49SKent Overstreet * 21952925fc49SKent Overstreet * this has to be done _before_ extending i_size: 2196e0541a93SKent Overstreet */ 2197e0541a93SKent Overstreet ret = filemap_write_and_wait_range(mapping, inode_u->bi_size, S64_MAX); 21981c6fdbd8SKent Overstreet if (ret) 21991c6fdbd8SKent Overstreet return ret; 22001c6fdbd8SKent Overstreet 22011c6fdbd8SKent Overstreet truncate_setsize(&inode->v, iattr->ia_size); 22021c6fdbd8SKent Overstreet /* ATTR_MODE will never be set here, ns argument isn't needed: */ 22031c6fdbd8SKent Overstreet setattr_copy(NULL, &inode->v, iattr); 22041c6fdbd8SKent Overstreet 22051c6fdbd8SKent Overstreet mutex_lock(&inode->ei_update_lock); 22062ea90048SKent Overstreet ret = bch2_write_inode_size(c, inode, inode->v.i_size, 22072ea90048SKent Overstreet ATTR_MTIME|ATTR_CTIME); 22081c6fdbd8SKent Overstreet mutex_unlock(&inode->ei_update_lock); 22091c6fdbd8SKent Overstreet 22101c6fdbd8SKent Overstreet return ret; 22111c6fdbd8SKent Overstreet } 22121c6fdbd8SKent Overstreet 221354e2264eSKent Overstreet static int bch2_truncate_finish_fn(struct bch_inode_info *inode, 221454e2264eSKent Overstreet struct bch_inode_unpacked *bi, 221554e2264eSKent Overstreet void *p) 221654e2264eSKent Overstreet { 221754e2264eSKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 221854e2264eSKent Overstreet 221954e2264eSKent Overstreet bi->bi_flags &= ~BCH_INODE_I_SIZE_DIRTY; 222054e2264eSKent Overstreet bi->bi_mtime = bi->bi_ctime = bch2_current_time(c); 222154e2264eSKent Overstreet return 0; 222254e2264eSKent Overstreet } 222354e2264eSKent Overstreet 222454e2264eSKent Overstreet static int bch2_truncate_start_fn(struct bch_inode_info *inode, 222554e2264eSKent Overstreet struct bch_inode_unpacked *bi, void *p) 222654e2264eSKent Overstreet { 222754e2264eSKent Overstreet u64 *new_i_size = p; 222854e2264eSKent Overstreet 222954e2264eSKent Overstreet bi->bi_flags |= BCH_INODE_I_SIZE_DIRTY; 223054e2264eSKent Overstreet bi->bi_size = *new_i_size; 223154e2264eSKent Overstreet return 0; 223254e2264eSKent Overstreet } 223354e2264eSKent Overstreet 22341c6fdbd8SKent Overstreet int bch2_truncate(struct bch_inode_info *inode, struct iattr *iattr) 22351c6fdbd8SKent Overstreet { 22361c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 22371c6fdbd8SKent Overstreet struct address_space *mapping = inode->v.i_mapping; 2238e0541a93SKent Overstreet struct bch_inode_unpacked inode_u; 2239e0541a93SKent Overstreet struct btree_trans trans; 2240e0541a93SKent Overstreet struct btree_iter *iter; 224154e2264eSKent Overstreet u64 new_i_size = iattr->ia_size; 22422e87eae1SKent Overstreet s64 i_sectors_delta = 0; 22431c6fdbd8SKent Overstreet int ret = 0; 22441c6fdbd8SKent Overstreet 22451c6fdbd8SKent Overstreet inode_dio_wait(&inode->v); 22461c6fdbd8SKent Overstreet bch2_pagecache_block_get(&inode->ei_pagecache_lock); 22471c6fdbd8SKent Overstreet 2248e0541a93SKent Overstreet /* 2249e0541a93SKent Overstreet * fetch current on disk i_size: inode is locked, i_size can only 2250e0541a93SKent Overstreet * increase underneath us: 2251e0541a93SKent Overstreet */ 2252e0541a93SKent Overstreet bch2_trans_init(&trans, c, 0, 0); 2253e0541a93SKent Overstreet iter = bch2_inode_peek(&trans, &inode_u, inode->v.i_ino, 0); 2254e0541a93SKent Overstreet ret = PTR_ERR_OR_ZERO(iter); 2255e0541a93SKent Overstreet bch2_trans_exit(&trans); 22561c6fdbd8SKent Overstreet 2257e0541a93SKent Overstreet if (ret) 2258e0541a93SKent Overstreet goto err; 22591c6fdbd8SKent Overstreet 2260c45d473dSKent Overstreet /* 2261c45d473dSKent Overstreet * check this before next assertion; on filesystem error our normal 2262c45d473dSKent Overstreet * invariants are a bit broken (truncate has to truncate the page cache 2263c45d473dSKent Overstreet * before the inode). 2264c45d473dSKent Overstreet */ 2265c45d473dSKent Overstreet ret = bch2_journal_error(&c->journal); 2266c45d473dSKent Overstreet if (ret) 2267c45d473dSKent Overstreet goto err; 2268c45d473dSKent Overstreet 2269e0541a93SKent Overstreet BUG_ON(inode->v.i_size < inode_u.bi_size); 2270e0541a93SKent Overstreet 2271e0541a93SKent Overstreet if (iattr->ia_size > inode->v.i_size) { 2272e0541a93SKent Overstreet ret = bch2_extend(inode, &inode_u, iattr); 227354e2264eSKent Overstreet goto err; 22741c6fdbd8SKent Overstreet } 22751c6fdbd8SKent Overstreet 22761c6fdbd8SKent Overstreet ret = bch2_truncate_page(inode, iattr->ia_size); 22771c6fdbd8SKent Overstreet if (unlikely(ret)) 227854e2264eSKent Overstreet goto err; 22791c6fdbd8SKent Overstreet 22806cc3535dSKent Overstreet /* 22816cc3535dSKent Overstreet * When extending, we're going to write the new i_size to disk 22826cc3535dSKent Overstreet * immediately so we need to flush anything above the current on disk 22836cc3535dSKent Overstreet * i_size first: 22846cc3535dSKent Overstreet * 22856cc3535dSKent Overstreet * Also, when extending we need to flush the page that i_size currently 22866cc3535dSKent Overstreet * straddles - if it's mapped to userspace, we need to ensure that 22876cc3535dSKent Overstreet * userspace has to redirty it and call .mkwrite -> set_page_dirty 22886cc3535dSKent Overstreet * again to allocate the part of the page that was extended. 22896cc3535dSKent Overstreet */ 2290e0541a93SKent Overstreet if (iattr->ia_size > inode_u.bi_size) 22911c6fdbd8SKent Overstreet ret = filemap_write_and_wait_range(mapping, 2292e0541a93SKent Overstreet inode_u.bi_size, 22931c6fdbd8SKent Overstreet iattr->ia_size - 1); 22941c6fdbd8SKent Overstreet else if (iattr->ia_size & (PAGE_SIZE - 1)) 22951c6fdbd8SKent Overstreet ret = filemap_write_and_wait_range(mapping, 22961c6fdbd8SKent Overstreet round_down(iattr->ia_size, PAGE_SIZE), 22971c6fdbd8SKent Overstreet iattr->ia_size - 1); 22981c6fdbd8SKent Overstreet if (ret) 229954e2264eSKent Overstreet goto err; 23001c6fdbd8SKent Overstreet 230154e2264eSKent Overstreet mutex_lock(&inode->ei_update_lock); 230254e2264eSKent Overstreet ret = bch2_write_inode(c, inode, bch2_truncate_start_fn, 230354e2264eSKent Overstreet &new_i_size, 0); 230454e2264eSKent Overstreet mutex_unlock(&inode->ei_update_lock); 23051c6fdbd8SKent Overstreet 23061c6fdbd8SKent Overstreet if (unlikely(ret)) 230754e2264eSKent Overstreet goto err; 23081c6fdbd8SKent Overstreet 23091c6fdbd8SKent Overstreet truncate_setsize(&inode->v, iattr->ia_size); 23101c6fdbd8SKent Overstreet 23112e87eae1SKent Overstreet ret = bch2_fpunch(c, inode->v.i_ino, 2312a99b1cafSKent Overstreet round_up(iattr->ia_size, block_bytes(c)) >> 9, 23132e87eae1SKent Overstreet U64_MAX, &inode->ei_journal_seq, &i_sectors_delta); 23142e87eae1SKent Overstreet i_sectors_acct(c, inode, NULL, i_sectors_delta); 23152e87eae1SKent Overstreet 23161c6fdbd8SKent Overstreet if (unlikely(ret)) 231754e2264eSKent Overstreet goto err; 23181c6fdbd8SKent Overstreet 23191c6fdbd8SKent Overstreet /* ATTR_MODE will never be set here, ns argument isn't needed: */ 23201c6fdbd8SKent Overstreet setattr_copy(NULL, &inode->v, iattr); 232154e2264eSKent Overstreet 232254e2264eSKent Overstreet mutex_lock(&inode->ei_update_lock); 232354e2264eSKent Overstreet ret = bch2_write_inode(c, inode, bch2_truncate_finish_fn, NULL, 232454e2264eSKent Overstreet ATTR_MTIME|ATTR_CTIME); 232554e2264eSKent Overstreet mutex_unlock(&inode->ei_update_lock); 232654e2264eSKent Overstreet err: 23271c6fdbd8SKent Overstreet bch2_pagecache_block_put(&inode->ei_pagecache_lock); 23281c6fdbd8SKent Overstreet return ret; 23291c6fdbd8SKent Overstreet } 23301c6fdbd8SKent Overstreet 23311c6fdbd8SKent Overstreet /* fallocate: */ 23321c6fdbd8SKent Overstreet 23332e87eae1SKent Overstreet static long bchfs_fpunch(struct bch_inode_info *inode, loff_t offset, loff_t len) 23341c6fdbd8SKent Overstreet { 23351c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 2336a99b1cafSKent Overstreet u64 discard_start = round_up(offset, block_bytes(c)) >> 9; 2337a99b1cafSKent Overstreet u64 discard_end = round_down(offset + len, block_bytes(c)) >> 9; 23381c6fdbd8SKent Overstreet int ret = 0; 23391c6fdbd8SKent Overstreet 23401c6fdbd8SKent Overstreet inode_lock(&inode->v); 23411c6fdbd8SKent Overstreet inode_dio_wait(&inode->v); 23421c6fdbd8SKent Overstreet bch2_pagecache_block_get(&inode->ei_pagecache_lock); 23431c6fdbd8SKent Overstreet 23441c6fdbd8SKent Overstreet ret = __bch2_truncate_page(inode, 23451c6fdbd8SKent Overstreet offset >> PAGE_SHIFT, 23461c6fdbd8SKent Overstreet offset, offset + len); 23471c6fdbd8SKent Overstreet if (unlikely(ret)) 23481c6fdbd8SKent Overstreet goto err; 23491c6fdbd8SKent Overstreet 23501c6fdbd8SKent Overstreet if (offset >> PAGE_SHIFT != 23511c6fdbd8SKent Overstreet (offset + len) >> PAGE_SHIFT) { 23521c6fdbd8SKent Overstreet ret = __bch2_truncate_page(inode, 23531c6fdbd8SKent Overstreet (offset + len) >> PAGE_SHIFT, 23541c6fdbd8SKent Overstreet offset, offset + len); 23551c6fdbd8SKent Overstreet if (unlikely(ret)) 23561c6fdbd8SKent Overstreet goto err; 23571c6fdbd8SKent Overstreet } 23581c6fdbd8SKent Overstreet 23591c6fdbd8SKent Overstreet truncate_pagecache_range(&inode->v, offset, offset + len - 1); 23601c6fdbd8SKent Overstreet 23612e87eae1SKent Overstreet if (discard_start < discard_end) { 23622e87eae1SKent Overstreet s64 i_sectors_delta = 0; 23632e87eae1SKent Overstreet 23642e87eae1SKent Overstreet ret = bch2_fpunch(c, inode->v.i_ino, 23652e87eae1SKent Overstreet discard_start, discard_end, 23662e87eae1SKent Overstreet &inode->ei_journal_seq, 23672e87eae1SKent Overstreet &i_sectors_delta); 23682e87eae1SKent Overstreet i_sectors_acct(c, inode, NULL, i_sectors_delta); 23692e87eae1SKent Overstreet } 23701c6fdbd8SKent Overstreet err: 23711c6fdbd8SKent Overstreet bch2_pagecache_block_put(&inode->ei_pagecache_lock); 23721c6fdbd8SKent Overstreet inode_unlock(&inode->v); 23731c6fdbd8SKent Overstreet 23741c6fdbd8SKent Overstreet return ret; 23751c6fdbd8SKent Overstreet } 23761c6fdbd8SKent Overstreet 23772e87eae1SKent Overstreet static long bchfs_fcollapse_finsert(struct bch_inode_info *inode, 23785f786787SKent Overstreet loff_t offset, loff_t len, 23795f786787SKent Overstreet bool insert) 23801c6fdbd8SKent Overstreet { 23811c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 23821c6fdbd8SKent Overstreet struct address_space *mapping = inode->v.i_mapping; 238335189e09SKent Overstreet struct bkey_on_stack copy; 2384d69f41d6SKent Overstreet struct btree_trans trans; 238524326cd1SKent Overstreet struct btree_iter *src, *dst; 23865f786787SKent Overstreet loff_t shift, new_size; 23875f786787SKent Overstreet u64 src_start; 23881c6fdbd8SKent Overstreet int ret; 23891c6fdbd8SKent Overstreet 23901c6fdbd8SKent Overstreet if ((offset | len) & (block_bytes(c) - 1)) 23911c6fdbd8SKent Overstreet return -EINVAL; 23921c6fdbd8SKent Overstreet 239335189e09SKent Overstreet bkey_on_stack_init(©); 239420bceecbSKent Overstreet bch2_trans_init(&trans, c, BTREE_ITER_MAX, 256); 23951c6fdbd8SKent Overstreet 23961c6fdbd8SKent Overstreet /* 23971c6fdbd8SKent Overstreet * We need i_mutex to keep the page cache consistent with the extents 23981c6fdbd8SKent Overstreet * btree, and the btree consistent with i_size - we don't need outside 23991c6fdbd8SKent Overstreet * locking for the extents btree itself, because we're using linked 24001c6fdbd8SKent Overstreet * iterators 24011c6fdbd8SKent Overstreet */ 24021c6fdbd8SKent Overstreet inode_lock(&inode->v); 24031c6fdbd8SKent Overstreet inode_dio_wait(&inode->v); 24041c6fdbd8SKent Overstreet bch2_pagecache_block_get(&inode->ei_pagecache_lock); 24051c6fdbd8SKent Overstreet 24065f786787SKent Overstreet if (insert) { 24075f786787SKent Overstreet ret = -EFBIG; 24085f786787SKent Overstreet if (inode->v.i_sb->s_maxbytes - inode->v.i_size < len) 24095f786787SKent Overstreet goto err; 24105f786787SKent Overstreet 24115f786787SKent Overstreet ret = -EINVAL; 24125f786787SKent Overstreet if (offset >= inode->v.i_size) 24135f786787SKent Overstreet goto err; 24145f786787SKent Overstreet 24155f786787SKent Overstreet src_start = U64_MAX; 24165f786787SKent Overstreet shift = len; 24175f786787SKent Overstreet } else { 24181c6fdbd8SKent Overstreet ret = -EINVAL; 24191c6fdbd8SKent Overstreet if (offset + len >= inode->v.i_size) 24201c6fdbd8SKent Overstreet goto err; 24211c6fdbd8SKent Overstreet 24225f786787SKent Overstreet src_start = offset + len; 24235f786787SKent Overstreet shift = -len; 24245f786787SKent Overstreet } 24251c6fdbd8SKent Overstreet 24265f786787SKent Overstreet new_size = inode->v.i_size + shift; 24271c6fdbd8SKent Overstreet 24281c6fdbd8SKent Overstreet ret = write_invalidate_inode_pages_range(mapping, offset, LLONG_MAX); 24291c6fdbd8SKent Overstreet if (ret) 24301c6fdbd8SKent Overstreet goto err; 24311c6fdbd8SKent Overstreet 24325f786787SKent Overstreet if (insert) { 24335f786787SKent Overstreet i_size_write(&inode->v, new_size); 24345f786787SKent Overstreet mutex_lock(&inode->ei_update_lock); 24355f786787SKent Overstreet ret = bch2_write_inode_size(c, inode, new_size, 24365f786787SKent Overstreet ATTR_MTIME|ATTR_CTIME); 24375f786787SKent Overstreet mutex_unlock(&inode->ei_update_lock); 24385f786787SKent Overstreet } else { 24392e87eae1SKent Overstreet s64 i_sectors_delta = 0; 24402e87eae1SKent Overstreet 24412e87eae1SKent Overstreet ret = bch2_fpunch(c, inode->v.i_ino, 24422e87eae1SKent Overstreet offset >> 9, (offset + len) >> 9, 24432e87eae1SKent Overstreet &inode->ei_journal_seq, 24442e87eae1SKent Overstreet &i_sectors_delta); 24452e87eae1SKent Overstreet i_sectors_acct(c, inode, NULL, i_sectors_delta); 24462e87eae1SKent Overstreet 244763095894SKent Overstreet if (ret) 244863095894SKent Overstreet goto err; 24495f786787SKent Overstreet } 24508ef231bdSKent Overstreet 24518ef231bdSKent Overstreet src = bch2_trans_get_iter(&trans, BTREE_ID_EXTENTS, 24525f786787SKent Overstreet POS(inode->v.i_ino, src_start >> 9), 245363095894SKent Overstreet BTREE_ITER_INTENT); 24548ef231bdSKent Overstreet BUG_ON(IS_ERR_OR_NULL(src)); 24551c6fdbd8SKent Overstreet 24565f786787SKent Overstreet dst = bch2_trans_copy_iter(&trans, src); 24575f786787SKent Overstreet BUG_ON(IS_ERR_OR_NULL(dst)); 24585f786787SKent Overstreet 245963095894SKent Overstreet while (1) { 246063095894SKent Overstreet struct disk_reservation disk_res = 246163095894SKent Overstreet bch2_disk_reservation_init(c, 0); 246263095894SKent Overstreet struct bkey_i delete; 246363095894SKent Overstreet struct bkey_s_c k; 246463095894SKent Overstreet struct bpos next_pos; 24655f786787SKent Overstreet struct bpos move_pos = POS(inode->v.i_ino, offset >> 9); 24665f786787SKent Overstreet struct bpos atomic_end; 24672d594dfbSKent Overstreet unsigned trigger_flags = 0; 246863095894SKent Overstreet 24695f786787SKent Overstreet k = insert 24705f786787SKent Overstreet ? bch2_btree_iter_peek_prev(src) 24715f786787SKent Overstreet : bch2_btree_iter_peek(src); 247263095894SKent Overstreet if ((ret = bkey_err(k))) 247363095894SKent Overstreet goto bkey_err; 247463095894SKent Overstreet 247563095894SKent Overstreet if (!k.k || k.k->p.inode != inode->v.i_ino) 247663095894SKent Overstreet break; 247763095894SKent Overstreet 24785f786787SKent Overstreet BUG_ON(bkey_cmp(src->pos, bkey_start_pos(k.k))); 247963095894SKent Overstreet 24805f786787SKent Overstreet if (insert && 24815f786787SKent Overstreet bkey_cmp(k.k->p, POS(inode->v.i_ino, offset >> 9)) <= 0) 24825f786787SKent Overstreet break; 24835f786787SKent Overstreet reassemble: 24845934a0caSKent Overstreet bkey_on_stack_reassemble(©, c, k); 24855f786787SKent Overstreet 24865f786787SKent Overstreet if (insert && 2487283eda57SKent Overstreet bkey_cmp(bkey_start_pos(k.k), move_pos) < 0) 248835189e09SKent Overstreet bch2_cut_front(move_pos, copy.k); 24895f786787SKent Overstreet 249035189e09SKent Overstreet copy.k->k.p.offset += shift >> 9; 249135189e09SKent Overstreet bch2_btree_iter_set_pos(dst, bkey_start_pos(©.k->k)); 24921c6fdbd8SKent Overstreet 249335189e09SKent Overstreet ret = bch2_extent_atomic_end(dst, copy.k, &atomic_end); 24943c7f3b7aSKent Overstreet if (ret) 24953c7f3b7aSKent Overstreet goto bkey_err; 2496e2d9912cSKent Overstreet 249735189e09SKent Overstreet if (bkey_cmp(atomic_end, copy.k->k.p)) { 24985f786787SKent Overstreet if (insert) { 24995f786787SKent Overstreet move_pos = atomic_end; 25005f786787SKent Overstreet move_pos.offset -= shift >> 9; 25015f786787SKent Overstreet goto reassemble; 25025f786787SKent Overstreet } else { 2503085ab693SKent Overstreet bch2_cut_back(atomic_end, copy.k); 25045f786787SKent Overstreet } 25055f786787SKent Overstreet } 25065f786787SKent Overstreet 250763095894SKent Overstreet bkey_init(&delete.k); 2508283eda57SKent Overstreet delete.k.p = copy.k->k.p; 2509283eda57SKent Overstreet delete.k.size = copy.k->k.size; 2510283eda57SKent Overstreet delete.k.p.offset -= shift >> 9; 25111c6fdbd8SKent Overstreet 25125f786787SKent Overstreet next_pos = insert ? bkey_start_pos(&delete.k) : delete.k.p; 251363095894SKent Overstreet 251435189e09SKent Overstreet if (copy.k->k.size == k.k->size) { 251563095894SKent Overstreet /* 251663095894SKent Overstreet * If we're moving the entire extent, we can skip 251763095894SKent Overstreet * running triggers: 251863095894SKent Overstreet */ 25192d594dfbSKent Overstreet trigger_flags |= BTREE_TRIGGER_NORUN; 252063095894SKent Overstreet } else { 252163095894SKent Overstreet /* We might end up splitting compressed extents: */ 252263095894SKent Overstreet unsigned nr_ptrs = 25234de77495SKent Overstreet bch2_bkey_nr_ptrs_allocated(bkey_i_to_s_c(copy.k)); 252463095894SKent Overstreet 252563095894SKent Overstreet ret = bch2_disk_reservation_get(c, &disk_res, 252635189e09SKent Overstreet copy.k->k.size, nr_ptrs, 25271c6fdbd8SKent Overstreet BCH_DISK_RESERVATION_NOFAIL); 25281c6fdbd8SKent Overstreet BUG_ON(ret); 252963095894SKent Overstreet } 25301c6fdbd8SKent Overstreet 2531283eda57SKent Overstreet bch2_btree_iter_set_pos(src, bkey_start_pos(&delete.k)); 2532283eda57SKent Overstreet 253324326cd1SKent Overstreet ret = bch2_trans_update(&trans, src, &delete, trigger_flags) ?: 253424326cd1SKent Overstreet bch2_trans_update(&trans, dst, copy.k, trigger_flags) ?: 253524326cd1SKent Overstreet bch2_trans_commit(&trans, &disk_res, 253663095894SKent Overstreet &inode->ei_journal_seq, 25372d594dfbSKent Overstreet BTREE_INSERT_NOFAIL); 25381c6fdbd8SKent Overstreet bch2_disk_reservation_put(c, &disk_res); 25390f238367SKent Overstreet bkey_err: 254063095894SKent Overstreet if (!ret) 254163095894SKent Overstreet bch2_btree_iter_set_pos(src, next_pos); 254263095894SKent Overstreet 25431c6fdbd8SKent Overstreet if (ret == -EINTR) 25441c6fdbd8SKent Overstreet ret = 0; 25458ef231bdSKent Overstreet if (ret) 25468ef231bdSKent Overstreet goto err; 25471c6fdbd8SKent Overstreet 2548424eb881SKent Overstreet bch2_trans_cond_resched(&trans); 25491c6fdbd8SKent Overstreet } 25508ef231bdSKent Overstreet bch2_trans_unlock(&trans); 25511c6fdbd8SKent Overstreet 25525f786787SKent Overstreet if (!insert) { 25538ef231bdSKent Overstreet i_size_write(&inode->v, new_size); 25548ef231bdSKent Overstreet mutex_lock(&inode->ei_update_lock); 25558ef231bdSKent Overstreet ret = bch2_write_inode_size(c, inode, new_size, 25568ef231bdSKent Overstreet ATTR_MTIME|ATTR_CTIME); 25578ef231bdSKent Overstreet mutex_unlock(&inode->ei_update_lock); 25585f786787SKent Overstreet } 25591c6fdbd8SKent Overstreet err: 25608ef231bdSKent Overstreet bch2_trans_exit(&trans); 256135189e09SKent Overstreet bkey_on_stack_exit(©, c); 25621c6fdbd8SKent Overstreet bch2_pagecache_block_put(&inode->ei_pagecache_lock); 25631c6fdbd8SKent Overstreet inode_unlock(&inode->v); 25641c6fdbd8SKent Overstreet return ret; 25651c6fdbd8SKent Overstreet } 25661c6fdbd8SKent Overstreet 25672e87eae1SKent Overstreet static long bchfs_fallocate(struct bch_inode_info *inode, int mode, 25681c6fdbd8SKent Overstreet loff_t offset, loff_t len) 25691c6fdbd8SKent Overstreet { 25701c6fdbd8SKent Overstreet struct address_space *mapping = inode->v.i_mapping; 25711c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 2572190fa7afSKent Overstreet struct btree_trans trans; 2573190fa7afSKent Overstreet struct btree_iter *iter; 25741c6fdbd8SKent Overstreet struct bpos end_pos; 25751c6fdbd8SKent Overstreet loff_t end = offset + len; 2576a99b1cafSKent Overstreet loff_t block_start = round_down(offset, block_bytes(c)); 2577a99b1cafSKent Overstreet loff_t block_end = round_up(end, block_bytes(c)); 25781c6fdbd8SKent Overstreet unsigned sectors; 25799a3df993SKent Overstreet unsigned replicas = io_opts(c, &inode->ei_inode).data_replicas; 25801c6fdbd8SKent Overstreet int ret; 25811c6fdbd8SKent Overstreet 258220bceecbSKent Overstreet bch2_trans_init(&trans, c, BTREE_ITER_MAX, 0); 25831c6fdbd8SKent Overstreet 25841c6fdbd8SKent Overstreet inode_lock(&inode->v); 25851c6fdbd8SKent Overstreet inode_dio_wait(&inode->v); 25861c6fdbd8SKent Overstreet bch2_pagecache_block_get(&inode->ei_pagecache_lock); 25871c6fdbd8SKent Overstreet 25881c6fdbd8SKent Overstreet if (!(mode & FALLOC_FL_KEEP_SIZE) && end > inode->v.i_size) { 25891c6fdbd8SKent Overstreet ret = inode_newsize_ok(&inode->v, end); 25901c6fdbd8SKent Overstreet if (ret) 25911c6fdbd8SKent Overstreet goto err; 25921c6fdbd8SKent Overstreet } 25931c6fdbd8SKent Overstreet 25941c6fdbd8SKent Overstreet if (mode & FALLOC_FL_ZERO_RANGE) { 25951c6fdbd8SKent Overstreet ret = __bch2_truncate_page(inode, 25961c6fdbd8SKent Overstreet offset >> PAGE_SHIFT, 25971c6fdbd8SKent Overstreet offset, end); 25981c6fdbd8SKent Overstreet 25991c6fdbd8SKent Overstreet if (!ret && 26001c6fdbd8SKent Overstreet offset >> PAGE_SHIFT != end >> PAGE_SHIFT) 26011c6fdbd8SKent Overstreet ret = __bch2_truncate_page(inode, 26021c6fdbd8SKent Overstreet end >> PAGE_SHIFT, 26031c6fdbd8SKent Overstreet offset, end); 26041c6fdbd8SKent Overstreet 26051c6fdbd8SKent Overstreet if (unlikely(ret)) 26061c6fdbd8SKent Overstreet goto err; 26071c6fdbd8SKent Overstreet 26081c6fdbd8SKent Overstreet truncate_pagecache_range(&inode->v, offset, end - 1); 26091c6fdbd8SKent Overstreet } 26101c6fdbd8SKent Overstreet 2611190fa7afSKent Overstreet iter = bch2_trans_get_iter(&trans, BTREE_ID_EXTENTS, 2612190fa7afSKent Overstreet POS(inode->v.i_ino, block_start >> 9), 2613190fa7afSKent Overstreet BTREE_ITER_SLOTS|BTREE_ITER_INTENT); 26141c6fdbd8SKent Overstreet end_pos = POS(inode->v.i_ino, block_end >> 9); 26151c6fdbd8SKent Overstreet 2616190fa7afSKent Overstreet while (bkey_cmp(iter->pos, end_pos) < 0) { 26172e87eae1SKent Overstreet s64 i_sectors_delta = 0; 26181c6fdbd8SKent Overstreet struct disk_reservation disk_res = { 0 }; 2619190fa7afSKent Overstreet struct quota_res quota_res = { 0 }; 26201c6fdbd8SKent Overstreet struct bkey_i_reservation reservation; 26211c6fdbd8SKent Overstreet struct bkey_s_c k; 26221c6fdbd8SKent Overstreet 2623163e885aSKent Overstreet bch2_trans_begin(&trans); 2624a8abd3a7SKent Overstreet 2625190fa7afSKent Overstreet k = bch2_btree_iter_peek_slot(iter); 26260f238367SKent Overstreet if ((ret = bkey_err(k))) 26270f238367SKent Overstreet goto bkey_err; 26281c6fdbd8SKent Overstreet 26291c6fdbd8SKent Overstreet /* already reserved */ 263026609b61SKent Overstreet if (k.k->type == KEY_TYPE_reservation && 26311c6fdbd8SKent Overstreet bkey_s_c_to_reservation(k).v->nr_replicas >= replicas) { 2632190fa7afSKent Overstreet bch2_btree_iter_next_slot(iter); 26331c6fdbd8SKent Overstreet continue; 26341c6fdbd8SKent Overstreet } 26351c6fdbd8SKent Overstreet 2636190fa7afSKent Overstreet if (bkey_extent_is_data(k.k) && 2637190fa7afSKent Overstreet !(mode & FALLOC_FL_ZERO_RANGE)) { 2638190fa7afSKent Overstreet bch2_btree_iter_next_slot(iter); 26391c6fdbd8SKent Overstreet continue; 26401c6fdbd8SKent Overstreet } 26411c6fdbd8SKent Overstreet 26421c6fdbd8SKent Overstreet bkey_reservation_init(&reservation.k_i); 264326609b61SKent Overstreet reservation.k.type = KEY_TYPE_reservation; 26441c6fdbd8SKent Overstreet reservation.k.p = k.k->p; 26451c6fdbd8SKent Overstreet reservation.k.size = k.k->size; 26461c6fdbd8SKent Overstreet 2647190fa7afSKent Overstreet bch2_cut_front(iter->pos, &reservation.k_i); 2648085ab693SKent Overstreet bch2_cut_back(end_pos, &reservation.k_i); 26491c6fdbd8SKent Overstreet 26501c6fdbd8SKent Overstreet sectors = reservation.k.size; 26514de77495SKent Overstreet reservation.v.nr_replicas = bch2_bkey_nr_ptrs_allocated(k); 26521c6fdbd8SKent Overstreet 26531c6fdbd8SKent Overstreet if (!bkey_extent_is_allocation(k.k)) { 26541c6fdbd8SKent Overstreet ret = bch2_quota_reservation_add(c, inode, 2655190fa7afSKent Overstreet "a_res, 26561c6fdbd8SKent Overstreet sectors, true); 26571c6fdbd8SKent Overstreet if (unlikely(ret)) 26580f238367SKent Overstreet goto bkey_err; 26591c6fdbd8SKent Overstreet } 26601c6fdbd8SKent Overstreet 26611c6fdbd8SKent Overstreet if (reservation.v.nr_replicas < replicas || 26624de77495SKent Overstreet bch2_bkey_sectors_compressed(k)) { 26631c6fdbd8SKent Overstreet ret = bch2_disk_reservation_get(c, &disk_res, sectors, 26641c6fdbd8SKent Overstreet replicas, 0); 26651c6fdbd8SKent Overstreet if (unlikely(ret)) 26660f238367SKent Overstreet goto bkey_err; 26671c6fdbd8SKent Overstreet 26681c6fdbd8SKent Overstreet reservation.v.nr_replicas = disk_res.nr_replicas; 26691c6fdbd8SKent Overstreet } 26701c6fdbd8SKent Overstreet 26712e87eae1SKent Overstreet ret = bch2_extent_update(&trans, iter, &reservation.k_i, 26722e87eae1SKent Overstreet &disk_res, &inode->ei_journal_seq, 26732e87eae1SKent Overstreet 0, &i_sectors_delta); 26742e87eae1SKent Overstreet i_sectors_acct(c, inode, "a_res, i_sectors_delta); 26750f238367SKent Overstreet bkey_err: 2676190fa7afSKent Overstreet bch2_quota_reservation_put(c, inode, "a_res); 26771c6fdbd8SKent Overstreet bch2_disk_reservation_put(c, &disk_res); 26781c6fdbd8SKent Overstreet if (ret == -EINTR) 26791c6fdbd8SKent Overstreet ret = 0; 2680190fa7afSKent Overstreet if (ret) 2681190fa7afSKent Overstreet goto err; 26821c6fdbd8SKent Overstreet } 2683e0541a93SKent Overstreet 2684e0541a93SKent Overstreet /* 2685e0541a93SKent Overstreet * Do we need to extend the file? 2686e0541a93SKent Overstreet * 2687e0541a93SKent Overstreet * If we zeroed up to the end of the file, we dropped whatever writes 2688e0541a93SKent Overstreet * were going to write out the current i_size, so we have to extend 2689e0541a93SKent Overstreet * manually even if FL_KEEP_SIZE was set: 2690e0541a93SKent Overstreet */ 2691e0541a93SKent Overstreet if (end >= inode->v.i_size && 2692e0541a93SKent Overstreet (!(mode & FALLOC_FL_KEEP_SIZE) || 2693e0541a93SKent Overstreet (mode & FALLOC_FL_ZERO_RANGE))) { 2694e0541a93SKent Overstreet struct btree_iter *inode_iter; 2695e0541a93SKent Overstreet struct bch_inode_unpacked inode_u; 2696e0541a93SKent Overstreet 2697e0541a93SKent Overstreet do { 2698e0541a93SKent Overstreet bch2_trans_begin(&trans); 2699e0541a93SKent Overstreet inode_iter = bch2_inode_peek(&trans, &inode_u, 2700e0541a93SKent Overstreet inode->v.i_ino, 0); 2701e0541a93SKent Overstreet ret = PTR_ERR_OR_ZERO(inode_iter); 2702e0541a93SKent Overstreet } while (ret == -EINTR); 2703e0541a93SKent Overstreet 2704190fa7afSKent Overstreet bch2_trans_unlock(&trans); 27051c6fdbd8SKent Overstreet 27061c6fdbd8SKent Overstreet if (ret) 27071c6fdbd8SKent Overstreet goto err; 27081c6fdbd8SKent Overstreet 2709e0541a93SKent Overstreet /* 2710e0541a93SKent Overstreet * Sync existing appends before extending i_size, 2711e0541a93SKent Overstreet * as in bch2_extend(): 2712e0541a93SKent Overstreet */ 2713e0541a93SKent Overstreet ret = filemap_write_and_wait_range(mapping, 2714e0541a93SKent Overstreet inode_u.bi_size, S64_MAX); 2715e0541a93SKent Overstreet if (ret) 2716e0541a93SKent Overstreet goto err; 2717e0541a93SKent Overstreet 2718e0541a93SKent Overstreet if (mode & FALLOC_FL_KEEP_SIZE) 2719e0541a93SKent Overstreet end = inode->v.i_size; 2720e0541a93SKent Overstreet else 2721e0541a93SKent Overstreet i_size_write(&inode->v, end); 2722e0541a93SKent Overstreet 27231c6fdbd8SKent Overstreet mutex_lock(&inode->ei_update_lock); 2724e0541a93SKent Overstreet ret = bch2_write_inode_size(c, inode, end, 0); 27251c6fdbd8SKent Overstreet mutex_unlock(&inode->ei_update_lock); 27261c6fdbd8SKent Overstreet } 27271c6fdbd8SKent Overstreet err: 2728190fa7afSKent Overstreet bch2_trans_exit(&trans); 27291c6fdbd8SKent Overstreet bch2_pagecache_block_put(&inode->ei_pagecache_lock); 27301c6fdbd8SKent Overstreet inode_unlock(&inode->v); 27311c6fdbd8SKent Overstreet return ret; 27321c6fdbd8SKent Overstreet } 27331c6fdbd8SKent Overstreet 27341c6fdbd8SKent Overstreet long bch2_fallocate_dispatch(struct file *file, int mode, 27351c6fdbd8SKent Overstreet loff_t offset, loff_t len) 27361c6fdbd8SKent Overstreet { 27371c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 27382a9101a9SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 27392a9101a9SKent Overstreet long ret; 27402a9101a9SKent Overstreet 27412a9101a9SKent Overstreet if (!percpu_ref_tryget(&c->writes)) 27422a9101a9SKent Overstreet return -EROFS; 27431c6fdbd8SKent Overstreet 27441c6fdbd8SKent Overstreet if (!(mode & ~(FALLOC_FL_KEEP_SIZE|FALLOC_FL_ZERO_RANGE))) 27452a9101a9SKent Overstreet ret = bchfs_fallocate(inode, mode, offset, len); 27462a9101a9SKent Overstreet else if (mode == (FALLOC_FL_PUNCH_HOLE|FALLOC_FL_KEEP_SIZE)) 27472a9101a9SKent Overstreet ret = bchfs_fpunch(inode, offset, len); 27482a9101a9SKent Overstreet else if (mode == FALLOC_FL_INSERT_RANGE) 27492a9101a9SKent Overstreet ret = bchfs_fcollapse_finsert(inode, offset, len, true); 27502a9101a9SKent Overstreet else if (mode == FALLOC_FL_COLLAPSE_RANGE) 27512a9101a9SKent Overstreet ret = bchfs_fcollapse_finsert(inode, offset, len, false); 27522a9101a9SKent Overstreet else 27532a9101a9SKent Overstreet ret = -EOPNOTSUPP; 27541c6fdbd8SKent Overstreet 27552a9101a9SKent Overstreet percpu_ref_put(&c->writes); 27561c6fdbd8SKent Overstreet 27572a9101a9SKent Overstreet return ret; 27581c6fdbd8SKent Overstreet } 27591c6fdbd8SKent Overstreet 276076426098SKent Overstreet static void mark_range_unallocated(struct bch_inode_info *inode, 276176426098SKent Overstreet loff_t start, loff_t end) 276276426098SKent Overstreet { 276376426098SKent Overstreet pgoff_t index = start >> PAGE_SHIFT; 276476426098SKent Overstreet pgoff_t end_index = (end - 1) >> PAGE_SHIFT; 276576426098SKent Overstreet struct folio_batch fbatch; 276676426098SKent Overstreet unsigned i, j; 276776426098SKent Overstreet 276876426098SKent Overstreet folio_batch_init(&fbatch); 276976426098SKent Overstreet 277076426098SKent Overstreet while (filemap_get_folios(inode->v.i_mapping, 277176426098SKent Overstreet &index, end_index, &fbatch)) { 277276426098SKent Overstreet for (i = 0; i < folio_batch_count(&fbatch); i++) { 277376426098SKent Overstreet struct folio *folio = fbatch.folios[i]; 277476426098SKent Overstreet struct bch_page_state *s; 277576426098SKent Overstreet 277676426098SKent Overstreet folio_lock(folio); 277776426098SKent Overstreet s = bch2_page_state(&folio->page); 277876426098SKent Overstreet 27793826ee0bSKent Overstreet if (s) { 27803826ee0bSKent Overstreet spin_lock(&s->lock); 278176426098SKent Overstreet for (j = 0; j < PAGE_SECTORS; j++) 278276426098SKent Overstreet s->s[j].nr_replicas = 0; 27833826ee0bSKent Overstreet spin_unlock(&s->lock); 27843826ee0bSKent Overstreet } 278576426098SKent Overstreet 278676426098SKent Overstreet folio_unlock(folio); 278776426098SKent Overstreet } 278876426098SKent Overstreet folio_batch_release(&fbatch); 278976426098SKent Overstreet cond_resched(); 279076426098SKent Overstreet } 279176426098SKent Overstreet } 279276426098SKent Overstreet 279376426098SKent Overstreet loff_t bch2_remap_file_range(struct file *file_src, loff_t pos_src, 279476426098SKent Overstreet struct file *file_dst, loff_t pos_dst, 279576426098SKent Overstreet loff_t len, unsigned remap_flags) 279676426098SKent Overstreet { 279776426098SKent Overstreet struct bch_inode_info *src = file_bch_inode(file_src); 279876426098SKent Overstreet struct bch_inode_info *dst = file_bch_inode(file_dst); 279976426098SKent Overstreet struct bch_fs *c = src->v.i_sb->s_fs_info; 28002e87eae1SKent Overstreet s64 i_sectors_delta = 0; 2801677fc056SKent Overstreet u64 aligned_len; 280276426098SKent Overstreet loff_t ret = 0; 280376426098SKent Overstreet 280436b8372bSKent Overstreet if (!c->opts.reflink) 280536b8372bSKent Overstreet return -EOPNOTSUPP; 280636b8372bSKent Overstreet 280776426098SKent Overstreet if (remap_flags & ~(REMAP_FILE_DEDUP|REMAP_FILE_ADVISORY)) 280876426098SKent Overstreet return -EINVAL; 280976426098SKent Overstreet 281076426098SKent Overstreet if (remap_flags & REMAP_FILE_DEDUP) 281176426098SKent Overstreet return -EOPNOTSUPP; 281276426098SKent Overstreet 281376426098SKent Overstreet if ((pos_src & (block_bytes(c) - 1)) || 281476426098SKent Overstreet (pos_dst & (block_bytes(c) - 1))) 281576426098SKent Overstreet return -EINVAL; 281676426098SKent Overstreet 281776426098SKent Overstreet if (src == dst && 281876426098SKent Overstreet abs(pos_src - pos_dst) < len) 281976426098SKent Overstreet return -EINVAL; 282076426098SKent Overstreet 282176426098SKent Overstreet bch2_lock_inodes(INODE_LOCK|INODE_PAGECACHE_BLOCK, src, dst); 282276426098SKent Overstreet 28232e87eae1SKent Overstreet file_update_time(file_dst); 28242e87eae1SKent Overstreet 282576426098SKent Overstreet inode_dio_wait(&src->v); 282676426098SKent Overstreet inode_dio_wait(&dst->v); 282776426098SKent Overstreet 282876426098SKent Overstreet ret = generic_remap_file_range_prep(file_src, pos_src, 282976426098SKent Overstreet file_dst, pos_dst, 283076426098SKent Overstreet &len, remap_flags); 283176426098SKent Overstreet if (ret < 0 || len == 0) 28322e87eae1SKent Overstreet goto err; 283376426098SKent Overstreet 2834677fc056SKent Overstreet aligned_len = round_up((u64) len, block_bytes(c)); 283576426098SKent Overstreet 283676426098SKent Overstreet ret = write_invalidate_inode_pages_range(dst->v.i_mapping, 2837677fc056SKent Overstreet pos_dst, pos_dst + len - 1); 283876426098SKent Overstreet if (ret) 28392e87eae1SKent Overstreet goto err; 284076426098SKent Overstreet 284176426098SKent Overstreet mark_range_unallocated(src, pos_src, pos_src + aligned_len); 284276426098SKent Overstreet 28432e87eae1SKent Overstreet ret = bch2_remap_range(c, 284476426098SKent Overstreet POS(dst->v.i_ino, pos_dst >> 9), 284576426098SKent Overstreet POS(src->v.i_ino, pos_src >> 9), 284676426098SKent Overstreet aligned_len >> 9, 28472e87eae1SKent Overstreet &dst->ei_journal_seq, 28482e87eae1SKent Overstreet pos_dst + len, &i_sectors_delta); 28492e87eae1SKent Overstreet if (ret < 0) 28502e87eae1SKent Overstreet goto err; 285176426098SKent Overstreet 28522e87eae1SKent Overstreet /* 28532e87eae1SKent Overstreet * due to alignment, we might have remapped slightly more than requsted 28542e87eae1SKent Overstreet */ 2855677fc056SKent Overstreet ret = min((u64) ret << 9, (u64) len); 28562e87eae1SKent Overstreet 28572e87eae1SKent Overstreet /* XXX get a quota reservation */ 28582e87eae1SKent Overstreet i_sectors_acct(c, dst, NULL, i_sectors_delta); 28592e87eae1SKent Overstreet 28602e87eae1SKent Overstreet spin_lock(&dst->v.i_lock); 2861677fc056SKent Overstreet if (pos_dst + ret > dst->v.i_size) 2862677fc056SKent Overstreet i_size_write(&dst->v, pos_dst + ret); 28632e87eae1SKent Overstreet spin_unlock(&dst->v.i_lock); 28642e87eae1SKent Overstreet err: 286576426098SKent Overstreet bch2_unlock_inodes(INODE_LOCK|INODE_PAGECACHE_BLOCK, src, dst); 286676426098SKent Overstreet 286776426098SKent Overstreet return ret; 286876426098SKent Overstreet } 286976426098SKent Overstreet 28701c6fdbd8SKent Overstreet /* fseek: */ 28711c6fdbd8SKent Overstreet 2872543ef2ebSKent Overstreet static int folio_data_offset(struct folio *folio, unsigned offset) 28731c6fdbd8SKent Overstreet { 2874f57a6a5dSKent Overstreet struct bch_page_state *s = bch2_page_state(&folio->page); 2875f57a6a5dSKent Overstreet unsigned i; 2876f81b648dSKent Overstreet 2877543ef2ebSKent Overstreet if (s) 2878543ef2ebSKent Overstreet for (i = offset >> 9; i < PAGE_SECTORS; i++) 2879f57a6a5dSKent Overstreet if (s->s[i].state >= SECTOR_DIRTY) 2880543ef2ebSKent Overstreet return i << 9; 2881f57a6a5dSKent Overstreet 2882543ef2ebSKent Overstreet return -1; 28831c6fdbd8SKent Overstreet } 28841c6fdbd8SKent Overstreet 2885543ef2ebSKent Overstreet static loff_t bch2_seek_pagecache_data(struct inode *vinode, 28861c6fdbd8SKent Overstreet loff_t start_offset, 28871c6fdbd8SKent Overstreet loff_t end_offset) 28881c6fdbd8SKent Overstreet { 28891c6fdbd8SKent Overstreet struct folio_batch fbatch; 28901c6fdbd8SKent Overstreet pgoff_t start_index = start_offset >> PAGE_SHIFT; 28911c6fdbd8SKent Overstreet pgoff_t end_index = end_offset >> PAGE_SHIFT; 28921c6fdbd8SKent Overstreet pgoff_t index = start_index; 28931c6fdbd8SKent Overstreet unsigned i; 2894543ef2ebSKent Overstreet loff_t ret; 2895543ef2ebSKent Overstreet int offset; 28961c6fdbd8SKent Overstreet 28971c6fdbd8SKent Overstreet folio_batch_init(&fbatch); 28981c6fdbd8SKent Overstreet 28991c6fdbd8SKent Overstreet while (filemap_get_folios(vinode->i_mapping, 29001c6fdbd8SKent Overstreet &index, end_index, &fbatch)) { 29011c6fdbd8SKent Overstreet for (i = 0; i < folio_batch_count(&fbatch); i++) { 29021c6fdbd8SKent Overstreet struct folio *folio = fbatch.folios[i]; 29031c6fdbd8SKent Overstreet 29041c6fdbd8SKent Overstreet folio_lock(folio); 2905543ef2ebSKent Overstreet offset = folio_data_offset(folio, 2906543ef2ebSKent Overstreet folio->index == start_index 2907543ef2ebSKent Overstreet ? start_offset & (PAGE_SIZE - 1) 2908543ef2ebSKent Overstreet : 0); 2909543ef2ebSKent Overstreet if (offset >= 0) { 2910543ef2ebSKent Overstreet ret = clamp(((loff_t) folio->index << PAGE_SHIFT) + 2911543ef2ebSKent Overstreet offset, 2912543ef2ebSKent Overstreet start_offset, end_offset); 29131c6fdbd8SKent Overstreet folio_unlock(folio); 29141c6fdbd8SKent Overstreet folio_batch_release(&fbatch); 2915543ef2ebSKent Overstreet return ret; 29161c6fdbd8SKent Overstreet } 29171c6fdbd8SKent Overstreet folio_unlock(folio); 29181c6fdbd8SKent Overstreet } 29191c6fdbd8SKent Overstreet folio_batch_release(&fbatch); 29201c6fdbd8SKent Overstreet cond_resched(); 29211c6fdbd8SKent Overstreet } 29221c6fdbd8SKent Overstreet 29231c6fdbd8SKent Overstreet return end_offset; 29241c6fdbd8SKent Overstreet } 29251c6fdbd8SKent Overstreet 29261c6fdbd8SKent Overstreet static loff_t bch2_seek_data(struct file *file, u64 offset) 29271c6fdbd8SKent Overstreet { 29281c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 29291c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 2930424eb881SKent Overstreet struct btree_trans trans; 2931424eb881SKent Overstreet struct btree_iter *iter; 29321c6fdbd8SKent Overstreet struct bkey_s_c k; 29331c6fdbd8SKent Overstreet u64 isize, next_data = MAX_LFS_FILESIZE; 29341c6fdbd8SKent Overstreet int ret; 29351c6fdbd8SKent Overstreet 29361c6fdbd8SKent Overstreet isize = i_size_read(&inode->v); 29371c6fdbd8SKent Overstreet if (offset >= isize) 29381c6fdbd8SKent Overstreet return -ENXIO; 29391c6fdbd8SKent Overstreet 294020bceecbSKent Overstreet bch2_trans_init(&trans, c, 0, 0); 2941424eb881SKent Overstreet 2942424eb881SKent Overstreet for_each_btree_key(&trans, iter, BTREE_ID_EXTENTS, 294394f651e2SKent Overstreet POS(inode->v.i_ino, offset >> 9), 0, k, ret) { 29441c6fdbd8SKent Overstreet if (k.k->p.inode != inode->v.i_ino) { 29451c6fdbd8SKent Overstreet break; 29461c6fdbd8SKent Overstreet } else if (bkey_extent_is_data(k.k)) { 29471c6fdbd8SKent Overstreet next_data = max(offset, bkey_start_offset(k.k) << 9); 29481c6fdbd8SKent Overstreet break; 29491c6fdbd8SKent Overstreet } else if (k.k->p.offset >> 9 > isize) 29501c6fdbd8SKent Overstreet break; 29511c6fdbd8SKent Overstreet } 29521c6fdbd8SKent Overstreet 295394f651e2SKent Overstreet ret = bch2_trans_exit(&trans) ?: ret; 29541c6fdbd8SKent Overstreet if (ret) 29551c6fdbd8SKent Overstreet return ret; 29561c6fdbd8SKent Overstreet 29571c6fdbd8SKent Overstreet if (next_data > offset) 2958543ef2ebSKent Overstreet next_data = bch2_seek_pagecache_data(&inode->v, 29591c6fdbd8SKent Overstreet offset, next_data); 29601c6fdbd8SKent Overstreet 2961e10d3094SKent Overstreet if (next_data >= isize) 29621c6fdbd8SKent Overstreet return -ENXIO; 29631c6fdbd8SKent Overstreet 29641c6fdbd8SKent Overstreet return vfs_setpos(file, next_data, MAX_LFS_FILESIZE); 29651c6fdbd8SKent Overstreet } 29661c6fdbd8SKent Overstreet 2967543ef2ebSKent Overstreet static int __page_hole_offset(struct page *page, unsigned offset) 29681c6fdbd8SKent Overstreet { 2969543ef2ebSKent Overstreet struct bch_page_state *s = bch2_page_state(page); 2970543ef2ebSKent Overstreet unsigned i; 2971543ef2ebSKent Overstreet 2972543ef2ebSKent Overstreet if (!s) 2973543ef2ebSKent Overstreet return 0; 2974543ef2ebSKent Overstreet 2975543ef2ebSKent Overstreet for (i = offset >> 9; i < PAGE_SECTORS; i++) 2976543ef2ebSKent Overstreet if (s->s[i].state < SECTOR_DIRTY) 2977543ef2ebSKent Overstreet return i << 9; 2978543ef2ebSKent Overstreet 2979543ef2ebSKent Overstreet return -1; 2980543ef2ebSKent Overstreet } 2981543ef2ebSKent Overstreet 2982543ef2ebSKent Overstreet static loff_t page_hole_offset(struct address_space *mapping, loff_t offset) 2983543ef2ebSKent Overstreet { 2984543ef2ebSKent Overstreet pgoff_t index = offset >> PAGE_SHIFT; 29851c6fdbd8SKent Overstreet struct page *page; 2986543ef2ebSKent Overstreet int pg_offset; 2987543ef2ebSKent Overstreet loff_t ret = -1; 29881c6fdbd8SKent Overstreet 29891c6fdbd8SKent Overstreet page = find_lock_page(mapping, index); 29901c6fdbd8SKent Overstreet if (!page) 2991543ef2ebSKent Overstreet return offset; 29921c6fdbd8SKent Overstreet 2993543ef2ebSKent Overstreet pg_offset = __page_hole_offset(page, offset & (PAGE_SIZE - 1)); 2994543ef2ebSKent Overstreet if (pg_offset >= 0) 2995543ef2ebSKent Overstreet ret = ((loff_t) index << PAGE_SHIFT) + pg_offset; 2996543ef2ebSKent Overstreet 29971c6fdbd8SKent Overstreet unlock_page(page); 29981c6fdbd8SKent Overstreet 29991c6fdbd8SKent Overstreet return ret; 30001c6fdbd8SKent Overstreet } 30011c6fdbd8SKent Overstreet 3002543ef2ebSKent Overstreet static loff_t bch2_seek_pagecache_hole(struct inode *vinode, 30031c6fdbd8SKent Overstreet loff_t start_offset, 30041c6fdbd8SKent Overstreet loff_t end_offset) 30051c6fdbd8SKent Overstreet { 30061c6fdbd8SKent Overstreet struct address_space *mapping = vinode->i_mapping; 3007543ef2ebSKent Overstreet loff_t offset = start_offset, hole; 30081c6fdbd8SKent Overstreet 3009543ef2ebSKent Overstreet while (offset < end_offset) { 3010543ef2ebSKent Overstreet hole = page_hole_offset(mapping, offset); 3011543ef2ebSKent Overstreet if (hole >= 0 && hole <= end_offset) 3012543ef2ebSKent Overstreet return max(start_offset, hole); 3013543ef2ebSKent Overstreet 3014543ef2ebSKent Overstreet offset += PAGE_SIZE; 3015543ef2ebSKent Overstreet offset &= PAGE_MASK; 3016543ef2ebSKent Overstreet } 30171c6fdbd8SKent Overstreet 30181c6fdbd8SKent Overstreet return end_offset; 30191c6fdbd8SKent Overstreet } 30201c6fdbd8SKent Overstreet 30211c6fdbd8SKent Overstreet static loff_t bch2_seek_hole(struct file *file, u64 offset) 30221c6fdbd8SKent Overstreet { 30231c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 30241c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 3025424eb881SKent Overstreet struct btree_trans trans; 3026424eb881SKent Overstreet struct btree_iter *iter; 30271c6fdbd8SKent Overstreet struct bkey_s_c k; 30281c6fdbd8SKent Overstreet u64 isize, next_hole = MAX_LFS_FILESIZE; 30291c6fdbd8SKent Overstreet int ret; 30301c6fdbd8SKent Overstreet 30311c6fdbd8SKent Overstreet isize = i_size_read(&inode->v); 30321c6fdbd8SKent Overstreet if (offset >= isize) 30331c6fdbd8SKent Overstreet return -ENXIO; 30341c6fdbd8SKent Overstreet 303520bceecbSKent Overstreet bch2_trans_init(&trans, c, 0, 0); 3036424eb881SKent Overstreet 3037424eb881SKent Overstreet for_each_btree_key(&trans, iter, BTREE_ID_EXTENTS, 30381c6fdbd8SKent Overstreet POS(inode->v.i_ino, offset >> 9), 303994f651e2SKent Overstreet BTREE_ITER_SLOTS, k, ret) { 30401c6fdbd8SKent Overstreet if (k.k->p.inode != inode->v.i_ino) { 3041543ef2ebSKent Overstreet next_hole = bch2_seek_pagecache_hole(&inode->v, 30421c6fdbd8SKent Overstreet offset, MAX_LFS_FILESIZE); 30431c6fdbd8SKent Overstreet break; 30441c6fdbd8SKent Overstreet } else if (!bkey_extent_is_data(k.k)) { 3045543ef2ebSKent Overstreet next_hole = bch2_seek_pagecache_hole(&inode->v, 30461c6fdbd8SKent Overstreet max(offset, bkey_start_offset(k.k) << 9), 30471c6fdbd8SKent Overstreet k.k->p.offset << 9); 30481c6fdbd8SKent Overstreet 30491c6fdbd8SKent Overstreet if (next_hole < k.k->p.offset << 9) 30501c6fdbd8SKent Overstreet break; 30511c6fdbd8SKent Overstreet } else { 30521c6fdbd8SKent Overstreet offset = max(offset, bkey_start_offset(k.k) << 9); 30531c6fdbd8SKent Overstreet } 30541c6fdbd8SKent Overstreet } 30551c6fdbd8SKent Overstreet 305694f651e2SKent Overstreet ret = bch2_trans_exit(&trans) ?: ret; 30571c6fdbd8SKent Overstreet if (ret) 30581c6fdbd8SKent Overstreet return ret; 30591c6fdbd8SKent Overstreet 30601c6fdbd8SKent Overstreet if (next_hole > isize) 30611c6fdbd8SKent Overstreet next_hole = isize; 30621c6fdbd8SKent Overstreet 30631c6fdbd8SKent Overstreet return vfs_setpos(file, next_hole, MAX_LFS_FILESIZE); 30641c6fdbd8SKent Overstreet } 30651c6fdbd8SKent Overstreet 30661c6fdbd8SKent Overstreet loff_t bch2_llseek(struct file *file, loff_t offset, int whence) 30671c6fdbd8SKent Overstreet { 30681c6fdbd8SKent Overstreet switch (whence) { 30691c6fdbd8SKent Overstreet case SEEK_SET: 30701c6fdbd8SKent Overstreet case SEEK_CUR: 30711c6fdbd8SKent Overstreet case SEEK_END: 30721c6fdbd8SKent Overstreet return generic_file_llseek(file, offset, whence); 30731c6fdbd8SKent Overstreet case SEEK_DATA: 30741c6fdbd8SKent Overstreet return bch2_seek_data(file, offset); 30751c6fdbd8SKent Overstreet case SEEK_HOLE: 30761c6fdbd8SKent Overstreet return bch2_seek_hole(file, offset); 30771c6fdbd8SKent Overstreet } 30781c6fdbd8SKent Overstreet 30791c6fdbd8SKent Overstreet return -EINVAL; 30801c6fdbd8SKent Overstreet } 30811c6fdbd8SKent Overstreet 30821c6fdbd8SKent Overstreet void bch2_fs_fsio_exit(struct bch_fs *c) 30831c6fdbd8SKent Overstreet { 30841c6fdbd8SKent Overstreet bioset_exit(&c->dio_write_bioset); 30851c6fdbd8SKent Overstreet bioset_exit(&c->dio_read_bioset); 30861c6fdbd8SKent Overstreet bioset_exit(&c->writepage_bioset); 30871c6fdbd8SKent Overstreet } 30881c6fdbd8SKent Overstreet 30891c6fdbd8SKent Overstreet int bch2_fs_fsio_init(struct bch_fs *c) 30901c6fdbd8SKent Overstreet { 30911c6fdbd8SKent Overstreet int ret = 0; 30921c6fdbd8SKent Overstreet 30931c6fdbd8SKent Overstreet pr_verbose_init(c->opts, ""); 30941c6fdbd8SKent Overstreet 30951c6fdbd8SKent Overstreet if (bioset_init(&c->writepage_bioset, 30969a3df993SKent Overstreet 4, offsetof(struct bch_writepage_io, op.wbio.bio), 30971c6fdbd8SKent Overstreet BIOSET_NEED_BVECS) || 30981c6fdbd8SKent Overstreet bioset_init(&c->dio_read_bioset, 30991c6fdbd8SKent Overstreet 4, offsetof(struct dio_read, rbio.bio), 31001c6fdbd8SKent Overstreet BIOSET_NEED_BVECS) || 31011c6fdbd8SKent Overstreet bioset_init(&c->dio_write_bioset, 31029a3df993SKent Overstreet 4, offsetof(struct dio_write, op.wbio.bio), 31031c6fdbd8SKent Overstreet BIOSET_NEED_BVECS)) 31041c6fdbd8SKent Overstreet ret = -ENOMEM; 31051c6fdbd8SKent Overstreet 31061c6fdbd8SKent Overstreet pr_verbose_init(c->opts, "ret %i", ret); 31071c6fdbd8SKent Overstreet return ret; 31081c6fdbd8SKent Overstreet } 31091c6fdbd8SKent Overstreet 31101c6fdbd8SKent Overstreet #endif /* NO_BCACHEFS_FS */ 3111