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" 607a1006aSKent Overstreet #include "bkey_buf.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> 309ba2eb25SKent 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 47eb8e6e9cSKent Overstreet static inline struct address_space *faults_disabled_mapping(void) 48eb8e6e9cSKent Overstreet { 49eb8e6e9cSKent Overstreet return (void *) (((unsigned long) current->faults_disabled_mapping) & ~1UL); 50eb8e6e9cSKent Overstreet } 51eb8e6e9cSKent Overstreet 52eb8e6e9cSKent Overstreet static inline void set_fdm_dropped_locks(void) 53eb8e6e9cSKent Overstreet { 54eb8e6e9cSKent Overstreet current->faults_disabled_mapping = 55eb8e6e9cSKent Overstreet (void *) (((unsigned long) current->faults_disabled_mapping)|1); 56eb8e6e9cSKent Overstreet } 57eb8e6e9cSKent Overstreet 58eb8e6e9cSKent Overstreet static inline bool fdm_dropped_locks(void) 59eb8e6e9cSKent Overstreet { 60eb8e6e9cSKent Overstreet return ((unsigned long) current->faults_disabled_mapping) & 1; 61eb8e6e9cSKent Overstreet } 62eb8e6e9cSKent Overstreet 631c6fdbd8SKent Overstreet struct quota_res { 641c6fdbd8SKent Overstreet u64 sectors; 651c6fdbd8SKent Overstreet }; 661c6fdbd8SKent Overstreet 679a3df993SKent Overstreet struct bch_writepage_io { 681c6fdbd8SKent Overstreet struct bch_inode_info *inode; 691c6fdbd8SKent Overstreet 701c6fdbd8SKent Overstreet /* must be last: */ 711c6fdbd8SKent Overstreet struct bch_write_op op; 721c6fdbd8SKent Overstreet }; 731c6fdbd8SKent Overstreet 741c6fdbd8SKent Overstreet struct dio_write { 75f8f30863SKent Overstreet struct completion done; 761c6fdbd8SKent Overstreet struct kiocb *req; 77ed484030SKent Overstreet struct mm_struct *mm; 781c6fdbd8SKent Overstreet unsigned loop:1, 791c6fdbd8SKent Overstreet sync:1, 801c6fdbd8SKent Overstreet free_iov:1; 811c6fdbd8SKent Overstreet struct quota_res quota_res; 82042a1f26SKent Overstreet u64 written; 831c6fdbd8SKent Overstreet 841c6fdbd8SKent Overstreet struct iov_iter iter; 851c6fdbd8SKent Overstreet struct iovec inline_vecs[2]; 861c6fdbd8SKent Overstreet 871c6fdbd8SKent Overstreet /* must be last: */ 889a3df993SKent Overstreet struct bch_write_op op; 891c6fdbd8SKent Overstreet }; 901c6fdbd8SKent Overstreet 911c6fdbd8SKent Overstreet struct dio_read { 921c6fdbd8SKent Overstreet struct closure cl; 931c6fdbd8SKent Overstreet struct kiocb *req; 941c6fdbd8SKent Overstreet long ret; 95b4725cc1SKent Overstreet bool should_dirty; 961c6fdbd8SKent Overstreet struct bch_read_bio rbio; 971c6fdbd8SKent Overstreet }; 981c6fdbd8SKent Overstreet 991c6fdbd8SKent Overstreet /* pagecache_block must be held */ 100a023127aSKent Overstreet static noinline int write_invalidate_inode_pages_range(struct address_space *mapping, 1011c6fdbd8SKent Overstreet loff_t start, loff_t end) 1021c6fdbd8SKent Overstreet { 1031c6fdbd8SKent Overstreet int ret; 1041c6fdbd8SKent Overstreet 1051c6fdbd8SKent Overstreet /* 1061c6fdbd8SKent Overstreet * XXX: the way this is currently implemented, we can spin if a process 1071c6fdbd8SKent Overstreet * is continually redirtying a specific page 1081c6fdbd8SKent Overstreet */ 1091c6fdbd8SKent Overstreet do { 1101c6fdbd8SKent Overstreet if (!mapping->nrpages) 1111c6fdbd8SKent Overstreet return 0; 1121c6fdbd8SKent Overstreet 1131c6fdbd8SKent Overstreet ret = filemap_write_and_wait_range(mapping, start, end); 1141c6fdbd8SKent Overstreet if (ret) 1151c6fdbd8SKent Overstreet break; 1161c6fdbd8SKent Overstreet 1171c6fdbd8SKent Overstreet if (!mapping->nrpages) 1181c6fdbd8SKent Overstreet return 0; 1191c6fdbd8SKent Overstreet 1201c6fdbd8SKent Overstreet ret = invalidate_inode_pages2_range(mapping, 1211c6fdbd8SKent Overstreet start >> PAGE_SHIFT, 1221c6fdbd8SKent Overstreet end >> PAGE_SHIFT); 1231c6fdbd8SKent Overstreet } while (ret == -EBUSY); 1241c6fdbd8SKent Overstreet 1251c6fdbd8SKent Overstreet return ret; 1261c6fdbd8SKent Overstreet } 1271c6fdbd8SKent Overstreet 1281c6fdbd8SKent Overstreet /* quotas */ 1291c6fdbd8SKent Overstreet 1301c6fdbd8SKent Overstreet #ifdef CONFIG_BCACHEFS_QUOTA 1311c6fdbd8SKent Overstreet 1321c6fdbd8SKent Overstreet static void bch2_quota_reservation_put(struct bch_fs *c, 1331c6fdbd8SKent Overstreet struct bch_inode_info *inode, 1341c6fdbd8SKent Overstreet struct quota_res *res) 1351c6fdbd8SKent Overstreet { 1361c6fdbd8SKent Overstreet if (!res->sectors) 1371c6fdbd8SKent Overstreet return; 1381c6fdbd8SKent Overstreet 1391c6fdbd8SKent Overstreet mutex_lock(&inode->ei_quota_lock); 1401c6fdbd8SKent Overstreet BUG_ON(res->sectors > inode->ei_quota_reserved); 1411c6fdbd8SKent Overstreet 1421c6fdbd8SKent Overstreet bch2_quota_acct(c, inode->ei_qid, Q_SPC, 14326609b61SKent Overstreet -((s64) res->sectors), KEY_TYPE_QUOTA_PREALLOC); 1441c6fdbd8SKent Overstreet inode->ei_quota_reserved -= res->sectors; 1451c6fdbd8SKent Overstreet mutex_unlock(&inode->ei_quota_lock); 1461c6fdbd8SKent Overstreet 1471c6fdbd8SKent Overstreet res->sectors = 0; 1481c6fdbd8SKent Overstreet } 1491c6fdbd8SKent Overstreet 1501c6fdbd8SKent Overstreet static int bch2_quota_reservation_add(struct bch_fs *c, 1511c6fdbd8SKent Overstreet struct bch_inode_info *inode, 1521c6fdbd8SKent Overstreet struct quota_res *res, 1531c6fdbd8SKent Overstreet unsigned sectors, 1541c6fdbd8SKent Overstreet bool check_enospc) 1551c6fdbd8SKent Overstreet { 1561c6fdbd8SKent Overstreet int ret; 1571c6fdbd8SKent Overstreet 1581c6fdbd8SKent Overstreet mutex_lock(&inode->ei_quota_lock); 1591c6fdbd8SKent Overstreet ret = bch2_quota_acct(c, inode->ei_qid, Q_SPC, sectors, 16026609b61SKent Overstreet check_enospc ? KEY_TYPE_QUOTA_PREALLOC : KEY_TYPE_QUOTA_NOCHECK); 1611c6fdbd8SKent Overstreet if (likely(!ret)) { 1621c6fdbd8SKent Overstreet inode->ei_quota_reserved += sectors; 1631c6fdbd8SKent Overstreet res->sectors += sectors; 1641c6fdbd8SKent Overstreet } 1651c6fdbd8SKent Overstreet mutex_unlock(&inode->ei_quota_lock); 1661c6fdbd8SKent Overstreet 1671c6fdbd8SKent Overstreet return ret; 1681c6fdbd8SKent Overstreet } 1691c6fdbd8SKent Overstreet 1701c6fdbd8SKent Overstreet #else 1711c6fdbd8SKent Overstreet 1721c6fdbd8SKent Overstreet static void bch2_quota_reservation_put(struct bch_fs *c, 1731c6fdbd8SKent Overstreet struct bch_inode_info *inode, 1741c6fdbd8SKent Overstreet struct quota_res *res) 1751c6fdbd8SKent Overstreet { 1761c6fdbd8SKent Overstreet } 1771c6fdbd8SKent Overstreet 1781c6fdbd8SKent Overstreet static int bch2_quota_reservation_add(struct bch_fs *c, 1791c6fdbd8SKent Overstreet struct bch_inode_info *inode, 1801c6fdbd8SKent Overstreet struct quota_res *res, 1811c6fdbd8SKent Overstreet unsigned sectors, 1821c6fdbd8SKent Overstreet bool check_enospc) 1831c6fdbd8SKent Overstreet { 1841c6fdbd8SKent Overstreet return 0; 1851c6fdbd8SKent Overstreet } 1861c6fdbd8SKent Overstreet 1871c6fdbd8SKent Overstreet #endif 1881c6fdbd8SKent Overstreet 1891c6fdbd8SKent Overstreet /* i_size updates: */ 1901c6fdbd8SKent Overstreet 1912ea90048SKent Overstreet struct inode_new_size { 1922ea90048SKent Overstreet loff_t new_size; 1932ea90048SKent Overstreet u64 now; 1942ea90048SKent Overstreet unsigned fields; 1952ea90048SKent Overstreet }; 1962ea90048SKent Overstreet 1971c6fdbd8SKent Overstreet static int inode_set_size(struct bch_inode_info *inode, 1981c6fdbd8SKent Overstreet struct bch_inode_unpacked *bi, 1991c6fdbd8SKent Overstreet void *p) 2001c6fdbd8SKent Overstreet { 2012ea90048SKent Overstreet struct inode_new_size *s = p; 2021c6fdbd8SKent Overstreet 2032ea90048SKent Overstreet bi->bi_size = s->new_size; 2042ea90048SKent Overstreet if (s->fields & ATTR_ATIME) 2052ea90048SKent Overstreet bi->bi_atime = s->now; 2062ea90048SKent Overstreet if (s->fields & ATTR_MTIME) 2072ea90048SKent Overstreet bi->bi_mtime = s->now; 2082ea90048SKent Overstreet if (s->fields & ATTR_CTIME) 2092ea90048SKent Overstreet bi->bi_ctime = s->now; 2101c6fdbd8SKent Overstreet 2111c6fdbd8SKent Overstreet return 0; 2121c6fdbd8SKent Overstreet } 2131c6fdbd8SKent Overstreet 21476426098SKent Overstreet int __must_check bch2_write_inode_size(struct bch_fs *c, 2151c6fdbd8SKent Overstreet struct bch_inode_info *inode, 2162ea90048SKent Overstreet loff_t new_size, unsigned fields) 2171c6fdbd8SKent Overstreet { 2182ea90048SKent Overstreet struct inode_new_size s = { 2192ea90048SKent Overstreet .new_size = new_size, 2202ea90048SKent Overstreet .now = bch2_current_time(c), 2212ea90048SKent Overstreet .fields = fields, 2222ea90048SKent Overstreet }; 2232ea90048SKent Overstreet 2242ea90048SKent Overstreet return bch2_write_inode(c, inode, inode_set_size, &s, fields); 2251c6fdbd8SKent Overstreet } 2261c6fdbd8SKent Overstreet 2271c6fdbd8SKent Overstreet static void i_sectors_acct(struct bch_fs *c, struct bch_inode_info *inode, 228190fa7afSKent Overstreet struct quota_res *quota_res, s64 sectors) 2291c6fdbd8SKent Overstreet { 230190fa7afSKent Overstreet if (!sectors) 231190fa7afSKent Overstreet return; 232190fa7afSKent Overstreet 2331c6fdbd8SKent Overstreet mutex_lock(&inode->ei_quota_lock); 2341c6fdbd8SKent Overstreet #ifdef CONFIG_BCACHEFS_QUOTA 2351c6fdbd8SKent Overstreet if (quota_res && sectors > 0) { 2361c6fdbd8SKent Overstreet BUG_ON(sectors > quota_res->sectors); 2371c6fdbd8SKent Overstreet BUG_ON(sectors > inode->ei_quota_reserved); 2381c6fdbd8SKent Overstreet 2391c6fdbd8SKent Overstreet quota_res->sectors -= sectors; 2401c6fdbd8SKent Overstreet inode->ei_quota_reserved -= sectors; 2411c6fdbd8SKent Overstreet } else { 24226609b61SKent Overstreet bch2_quota_acct(c, inode->ei_qid, Q_SPC, sectors, KEY_TYPE_QUOTA_WARN); 2431c6fdbd8SKent Overstreet } 2441c6fdbd8SKent Overstreet #endif 2451c6fdbd8SKent Overstreet inode->v.i_blocks += sectors; 2461c6fdbd8SKent Overstreet mutex_unlock(&inode->ei_quota_lock); 2471c6fdbd8SKent Overstreet } 2481c6fdbd8SKent Overstreet 2491c6fdbd8SKent Overstreet /* page state: */ 2501c6fdbd8SKent Overstreet 2511c6fdbd8SKent Overstreet /* stored in page->private: */ 2521c6fdbd8SKent Overstreet 253f57a6a5dSKent Overstreet struct bch_page_sector { 254f81b648dSKent Overstreet /* Uncompressed, fully allocated replicas: */ 255f57a6a5dSKent Overstreet unsigned nr_replicas:3; 256f81b648dSKent Overstreet 257f81b648dSKent Overstreet /* Owns PAGE_SECTORS * replicas_reserved sized reservation: */ 258f57a6a5dSKent Overstreet unsigned replicas_reserved:3; 2591c6fdbd8SKent Overstreet 260f57a6a5dSKent Overstreet /* i_sectors: */ 261f57a6a5dSKent Overstreet enum { 262f57a6a5dSKent Overstreet SECTOR_UNALLOCATED, 2632ba5d38bSKent Overstreet SECTOR_RESERVED, 264f57a6a5dSKent Overstreet SECTOR_DIRTY, 265f57a6a5dSKent Overstreet SECTOR_ALLOCATED, 266f57a6a5dSKent Overstreet } state:2; 2671c6fdbd8SKent Overstreet }; 2681c6fdbd8SKent Overstreet 269f57a6a5dSKent Overstreet struct bch_page_state { 2703826ee0bSKent Overstreet spinlock_t lock; 2717f5e31e1SKent Overstreet atomic_t write_count; 272f57a6a5dSKent Overstreet struct bch_page_sector s[PAGE_SECTORS]; 273f57a6a5dSKent Overstreet }; 274f57a6a5dSKent Overstreet 275f57a6a5dSKent Overstreet static inline struct bch_page_state *__bch2_page_state(struct page *page) 2761c6fdbd8SKent Overstreet { 277f57a6a5dSKent Overstreet return page_has_private(page) 278f57a6a5dSKent Overstreet ? (struct bch_page_state *) page_private(page) 279f57a6a5dSKent Overstreet : NULL; 280f57a6a5dSKent Overstreet } 2811c6fdbd8SKent Overstreet 282f57a6a5dSKent Overstreet static inline struct bch_page_state *bch2_page_state(struct page *page) 283f57a6a5dSKent Overstreet { 284e1036a2aSKent Overstreet EBUG_ON(!PageLocked(page)); 2851c6fdbd8SKent Overstreet 286f57a6a5dSKent Overstreet return __bch2_page_state(page); 287f57a6a5dSKent Overstreet } 288f57a6a5dSKent Overstreet 289f57a6a5dSKent Overstreet /* for newly allocated pages: */ 290f57a6a5dSKent Overstreet static void __bch2_page_state_release(struct page *page) 291f57a6a5dSKent Overstreet { 29200276f9fSMatthew Wilcox (Oracle) kfree(detach_page_private(page)); 293f57a6a5dSKent Overstreet } 294f57a6a5dSKent Overstreet 295f57a6a5dSKent Overstreet static void bch2_page_state_release(struct page *page) 296f57a6a5dSKent Overstreet { 29700276f9fSMatthew Wilcox (Oracle) EBUG_ON(!PageLocked(page)); 29800276f9fSMatthew Wilcox (Oracle) __bch2_page_state_release(page); 299f57a6a5dSKent Overstreet } 300f57a6a5dSKent Overstreet 301f57a6a5dSKent Overstreet /* for newly allocated pages: */ 302f57a6a5dSKent Overstreet static struct bch_page_state *__bch2_page_state_create(struct page *page, 303f57a6a5dSKent Overstreet gfp_t gfp) 304f57a6a5dSKent Overstreet { 305f57a6a5dSKent Overstreet struct bch_page_state *s; 306f57a6a5dSKent Overstreet 307f57a6a5dSKent Overstreet s = kzalloc(sizeof(*s), GFP_NOFS|gfp); 308f57a6a5dSKent Overstreet if (!s) 309f57a6a5dSKent Overstreet return NULL; 310f57a6a5dSKent Overstreet 3113826ee0bSKent Overstreet spin_lock_init(&s->lock); 31200276f9fSMatthew Wilcox (Oracle) attach_page_private(page, s); 3131c6fdbd8SKent Overstreet return s; 3141c6fdbd8SKent Overstreet } 3151c6fdbd8SKent Overstreet 316f57a6a5dSKent Overstreet static struct bch_page_state *bch2_page_state_create(struct page *page, 317f57a6a5dSKent Overstreet gfp_t gfp) 318f57a6a5dSKent Overstreet { 319f57a6a5dSKent Overstreet return bch2_page_state(page) ?: __bch2_page_state_create(page, gfp); 320f57a6a5dSKent Overstreet } 321f57a6a5dSKent Overstreet 322e1036a2aSKent Overstreet static inline unsigned inode_nr_replicas(struct bch_fs *c, struct bch_inode_info *inode) 323e1036a2aSKent Overstreet { 324e1036a2aSKent Overstreet /* XXX: this should not be open coded */ 325e1036a2aSKent Overstreet return inode->ei_inode.bi_data_replicas 326e1036a2aSKent Overstreet ? inode->ei_inode.bi_data_replicas - 1 327e1036a2aSKent Overstreet : c->opts.data_replicas; 328e1036a2aSKent Overstreet } 329e1036a2aSKent Overstreet 330f57a6a5dSKent Overstreet static inline unsigned sectors_to_reserve(struct bch_page_sector *s, 331f57a6a5dSKent Overstreet unsigned nr_replicas) 332f57a6a5dSKent Overstreet { 333f57a6a5dSKent Overstreet return max(0, (int) nr_replicas - 334f57a6a5dSKent Overstreet s->nr_replicas - 335f57a6a5dSKent Overstreet s->replicas_reserved); 336f57a6a5dSKent Overstreet } 337f57a6a5dSKent Overstreet 338f57a6a5dSKent Overstreet static int bch2_get_page_disk_reservation(struct bch_fs *c, 339f57a6a5dSKent Overstreet struct bch_inode_info *inode, 3401c6fdbd8SKent Overstreet struct page *page, bool check_enospc) 3411c6fdbd8SKent Overstreet { 342f57a6a5dSKent Overstreet struct bch_page_state *s = bch2_page_state_create(page, 0); 343e1036a2aSKent Overstreet unsigned nr_replicas = inode_nr_replicas(c, inode); 344f57a6a5dSKent Overstreet struct disk_reservation disk_res = { 0 }; 345f57a6a5dSKent Overstreet unsigned i, disk_res_sectors = 0; 346f81b648dSKent Overstreet int ret; 3471c6fdbd8SKent Overstreet 348f57a6a5dSKent Overstreet if (!s) 349f57a6a5dSKent Overstreet return -ENOMEM; 3501c6fdbd8SKent Overstreet 351f57a6a5dSKent Overstreet for (i = 0; i < ARRAY_SIZE(s->s); i++) 352f57a6a5dSKent Overstreet disk_res_sectors += sectors_to_reserve(&s->s[i], nr_replicas); 353f57a6a5dSKent Overstreet 354f57a6a5dSKent Overstreet if (!disk_res_sectors) 355f57a6a5dSKent Overstreet return 0; 356f57a6a5dSKent Overstreet 357f57a6a5dSKent Overstreet ret = bch2_disk_reservation_get(c, &disk_res, 358f57a6a5dSKent Overstreet disk_res_sectors, 1, 359f57a6a5dSKent Overstreet !check_enospc 360f57a6a5dSKent Overstreet ? BCH_DISK_RESERVATION_NOFAIL 361f57a6a5dSKent Overstreet : 0); 3621c6fdbd8SKent Overstreet if (unlikely(ret)) 363f81b648dSKent Overstreet return ret; 364f81b648dSKent Overstreet 365f57a6a5dSKent Overstreet for (i = 0; i < ARRAY_SIZE(s->s); i++) 366f57a6a5dSKent Overstreet s->s[i].replicas_reserved += 367f57a6a5dSKent Overstreet sectors_to_reserve(&s->s[i], nr_replicas); 368f57a6a5dSKent Overstreet 369f57a6a5dSKent Overstreet return 0; 3701c6fdbd8SKent Overstreet } 3711c6fdbd8SKent Overstreet 372d1542e03SKent Overstreet struct bch2_page_reservation { 373d1542e03SKent Overstreet struct disk_reservation disk; 374d1542e03SKent Overstreet struct quota_res quota; 375d1542e03SKent Overstreet }; 376d1542e03SKent Overstreet 377d1542e03SKent Overstreet static void bch2_page_reservation_init(struct bch_fs *c, 378f57a6a5dSKent Overstreet struct bch_inode_info *inode, 379d1542e03SKent Overstreet struct bch2_page_reservation *res) 380d1542e03SKent Overstreet { 381d1542e03SKent Overstreet memset(res, 0, sizeof(*res)); 382d1542e03SKent Overstreet 383d1542e03SKent Overstreet res->disk.nr_replicas = inode_nr_replicas(c, inode); 384d1542e03SKent Overstreet } 385d1542e03SKent Overstreet 386d1542e03SKent Overstreet static void bch2_page_reservation_put(struct bch_fs *c, 387d1542e03SKent Overstreet struct bch_inode_info *inode, 388d1542e03SKent Overstreet struct bch2_page_reservation *res) 389d1542e03SKent Overstreet { 390d1542e03SKent Overstreet bch2_disk_reservation_put(c, &res->disk); 391d1542e03SKent Overstreet bch2_quota_reservation_put(c, inode, &res->quota); 392d1542e03SKent Overstreet } 393d1542e03SKent Overstreet 394d1542e03SKent Overstreet static int bch2_page_reservation_get(struct bch_fs *c, 395d1542e03SKent Overstreet struct bch_inode_info *inode, struct page *page, 396d1542e03SKent Overstreet struct bch2_page_reservation *res, 397d1542e03SKent Overstreet unsigned offset, unsigned len, bool check_enospc) 398f57a6a5dSKent Overstreet { 399f57a6a5dSKent Overstreet struct bch_page_state *s = bch2_page_state_create(page, 0); 400d1542e03SKent Overstreet unsigned i, disk_sectors = 0, quota_sectors = 0; 401f57a6a5dSKent Overstreet int ret; 402f57a6a5dSKent Overstreet 403f57a6a5dSKent Overstreet if (!s) 404f57a6a5dSKent Overstreet return -ENOMEM; 405f57a6a5dSKent Overstreet 4064b0a66d5SKent Overstreet for (i = round_down(offset, block_bytes(c)) >> 9; 4074b0a66d5SKent Overstreet i < round_up(offset + len, block_bytes(c)) >> 9; 408d1542e03SKent Overstreet i++) { 409d1542e03SKent Overstreet disk_sectors += sectors_to_reserve(&s->s[i], 410d1542e03SKent Overstreet res->disk.nr_replicas); 411d1542e03SKent Overstreet quota_sectors += s->s[i].state == SECTOR_UNALLOCATED; 4121c6fdbd8SKent Overstreet } 4131c6fdbd8SKent Overstreet 414d1542e03SKent Overstreet if (disk_sectors) { 415d1542e03SKent Overstreet ret = bch2_disk_reservation_add(c, &res->disk, 416d1542e03SKent Overstreet disk_sectors, 417d1542e03SKent Overstreet !check_enospc 418d1542e03SKent Overstreet ? BCH_DISK_RESERVATION_NOFAIL 419d1542e03SKent Overstreet : 0); 420d1542e03SKent Overstreet if (unlikely(ret)) 421d1542e03SKent Overstreet return ret; 422d1542e03SKent Overstreet } 423d1542e03SKent Overstreet 424d1542e03SKent Overstreet if (quota_sectors) { 425d1542e03SKent Overstreet ret = bch2_quota_reservation_add(c, inode, &res->quota, 426d1542e03SKent Overstreet quota_sectors, 427d1542e03SKent Overstreet check_enospc); 428d1542e03SKent Overstreet if (unlikely(ret)) { 429d1542e03SKent Overstreet struct disk_reservation tmp = { 430d1542e03SKent Overstreet .sectors = disk_sectors 431d1542e03SKent Overstreet }; 432d1542e03SKent Overstreet 433d1542e03SKent Overstreet bch2_disk_reservation_put(c, &tmp); 434d1542e03SKent Overstreet res->disk.sectors -= disk_sectors; 435d1542e03SKent Overstreet return ret; 436d1542e03SKent Overstreet } 437d1542e03SKent Overstreet } 438d1542e03SKent Overstreet 439d1542e03SKent Overstreet return 0; 440f57a6a5dSKent Overstreet } 441f57a6a5dSKent Overstreet 4421c6fdbd8SKent Overstreet static void bch2_clear_page_bits(struct page *page) 4431c6fdbd8SKent Overstreet { 4441c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(page->mapping->host); 4451c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 446f57a6a5dSKent Overstreet struct bch_page_state *s = bch2_page_state(page); 447d1542e03SKent Overstreet struct disk_reservation disk_res = { 0 }; 448f57a6a5dSKent Overstreet int i, dirty_sectors = 0; 4491c6fdbd8SKent Overstreet 450f57a6a5dSKent Overstreet if (!s) 4511c6fdbd8SKent Overstreet return; 4521c6fdbd8SKent Overstreet 4533826ee0bSKent Overstreet EBUG_ON(!PageLocked(page)); 4543826ee0bSKent Overstreet EBUG_ON(PageWriteback(page)); 4553826ee0bSKent Overstreet 456f57a6a5dSKent Overstreet for (i = 0; i < ARRAY_SIZE(s->s); i++) { 457d1542e03SKent Overstreet disk_res.sectors += s->s[i].replicas_reserved; 458d1542e03SKent Overstreet s->s[i].replicas_reserved = 0; 459d1542e03SKent Overstreet 460f57a6a5dSKent Overstreet if (s->s[i].state == SECTOR_DIRTY) { 461f57a6a5dSKent Overstreet dirty_sectors++; 462f57a6a5dSKent Overstreet s->s[i].state = SECTOR_UNALLOCATED; 463f57a6a5dSKent Overstreet } 464f57a6a5dSKent Overstreet } 465adfcfaf0SKent Overstreet 466d1542e03SKent Overstreet bch2_disk_reservation_put(c, &disk_res); 467d1542e03SKent Overstreet 468f57a6a5dSKent Overstreet if (dirty_sectors) 469f57a6a5dSKent Overstreet i_sectors_acct(c, inode, NULL, -dirty_sectors); 470adfcfaf0SKent Overstreet 471f57a6a5dSKent Overstreet bch2_page_state_release(page); 4721c6fdbd8SKent Overstreet } 4731c6fdbd8SKent Overstreet 474d1542e03SKent Overstreet static void bch2_set_page_dirty(struct bch_fs *c, 475d1542e03SKent Overstreet struct bch_inode_info *inode, struct page *page, 476d1542e03SKent Overstreet struct bch2_page_reservation *res, 477d1542e03SKent Overstreet unsigned offset, unsigned len) 4781c6fdbd8SKent Overstreet { 479d1542e03SKent Overstreet struct bch_page_state *s = bch2_page_state(page); 480f57a6a5dSKent Overstreet unsigned i, dirty_sectors = 0; 4811c6fdbd8SKent Overstreet 482877dfb34SKent Overstreet WARN_ON((u64) page_offset(page) + offset + len > 483877dfb34SKent Overstreet round_up((u64) i_size_read(&inode->v), block_bytes(c))); 484fb472ac5SKent Overstreet 4853826ee0bSKent Overstreet spin_lock(&s->lock); 4863826ee0bSKent Overstreet 4874b0a66d5SKent Overstreet for (i = round_down(offset, block_bytes(c)) >> 9; 4884b0a66d5SKent Overstreet i < round_up(offset + len, block_bytes(c)) >> 9; 489d1542e03SKent Overstreet i++) { 490d1542e03SKent Overstreet unsigned sectors = sectors_to_reserve(&s->s[i], 491d1542e03SKent Overstreet res->disk.nr_replicas); 4921c6fdbd8SKent Overstreet 493406d6d5aSKent Overstreet /* 494406d6d5aSKent Overstreet * This can happen if we race with the error path in 495406d6d5aSKent Overstreet * bch2_writepage_io_done(): 496406d6d5aSKent Overstreet */ 497406d6d5aSKent Overstreet sectors = min_t(unsigned, sectors, res->disk.sectors); 498406d6d5aSKent Overstreet 499d1542e03SKent Overstreet s->s[i].replicas_reserved += sectors; 500d1542e03SKent Overstreet res->disk.sectors -= sectors; 501adfcfaf0SKent Overstreet 5022ba5d38bSKent Overstreet if (s->s[i].state == SECTOR_UNALLOCATED) 503f57a6a5dSKent Overstreet dirty_sectors++; 5042ba5d38bSKent Overstreet 5052ba5d38bSKent Overstreet s->s[i].state = max_t(unsigned, s->s[i].state, SECTOR_DIRTY); 506f57a6a5dSKent Overstreet } 507f57a6a5dSKent Overstreet 5083826ee0bSKent Overstreet spin_unlock(&s->lock); 5093826ee0bSKent Overstreet 510f57a6a5dSKent Overstreet if (dirty_sectors) 511d1542e03SKent Overstreet i_sectors_acct(c, inode, &res->quota, dirty_sectors); 5121c6fdbd8SKent Overstreet 513d1542e03SKent Overstreet if (!PageDirty(page)) 514d1542e03SKent Overstreet filemap_dirty_folio(inode->v.i_mapping, page_folio(page)); 5151c6fdbd8SKent Overstreet } 5161c6fdbd8SKent Overstreet 5171c6fdbd8SKent Overstreet vm_fault_t bch2_page_fault(struct vm_fault *vmf) 5181c6fdbd8SKent Overstreet { 5191c6fdbd8SKent Overstreet struct file *file = vmf->vma->vm_file; 520eb8e6e9cSKent Overstreet struct address_space *mapping = file->f_mapping; 521eb8e6e9cSKent Overstreet struct address_space *fdm = faults_disabled_mapping(); 5221c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 5231c6fdbd8SKent Overstreet int ret; 5241c6fdbd8SKent Overstreet 525eb8e6e9cSKent Overstreet if (fdm == mapping) 526eb8e6e9cSKent Overstreet return VM_FAULT_SIGBUS; 527eb8e6e9cSKent Overstreet 528eb8e6e9cSKent Overstreet /* Lock ordering: */ 529eb8e6e9cSKent Overstreet if (fdm > mapping) { 530eb8e6e9cSKent Overstreet struct bch_inode_info *fdm_host = to_bch_ei(fdm->host); 531eb8e6e9cSKent Overstreet 532eb8e6e9cSKent Overstreet if (bch2_pagecache_add_tryget(&inode->ei_pagecache_lock)) 533eb8e6e9cSKent Overstreet goto got_lock; 534eb8e6e9cSKent Overstreet 535eb8e6e9cSKent Overstreet bch2_pagecache_block_put(&fdm_host->ei_pagecache_lock); 536eb8e6e9cSKent Overstreet 5371c6fdbd8SKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 538eb8e6e9cSKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 539eb8e6e9cSKent Overstreet 540eb8e6e9cSKent Overstreet bch2_pagecache_block_get(&fdm_host->ei_pagecache_lock); 541eb8e6e9cSKent Overstreet 542eb8e6e9cSKent Overstreet /* Signal that lock has been dropped: */ 543eb8e6e9cSKent Overstreet set_fdm_dropped_locks(); 544eb8e6e9cSKent Overstreet return VM_FAULT_SIGBUS; 545eb8e6e9cSKent Overstreet } 546eb8e6e9cSKent Overstreet 547eb8e6e9cSKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 548eb8e6e9cSKent Overstreet got_lock: 5491c6fdbd8SKent Overstreet ret = filemap_fault(vmf); 5501c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 5511c6fdbd8SKent Overstreet 5521c6fdbd8SKent Overstreet return ret; 5531c6fdbd8SKent Overstreet } 5541c6fdbd8SKent Overstreet 5551c6fdbd8SKent Overstreet vm_fault_t bch2_page_mkwrite(struct vm_fault *vmf) 5561c6fdbd8SKent Overstreet { 5571c6fdbd8SKent Overstreet struct page *page = vmf->page; 5581c6fdbd8SKent Overstreet struct file *file = vmf->vma->vm_file; 5591c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 5601c6fdbd8SKent Overstreet struct address_space *mapping = file->f_mapping; 5611c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 562d1542e03SKent Overstreet struct bch2_page_reservation res; 5636cc3535dSKent Overstreet unsigned len; 5646cc3535dSKent Overstreet loff_t isize; 5651c6fdbd8SKent Overstreet int ret = VM_FAULT_LOCKED; 5661c6fdbd8SKent Overstreet 567d1542e03SKent Overstreet bch2_page_reservation_init(c, inode, &res); 568d1542e03SKent Overstreet 5691c6fdbd8SKent Overstreet sb_start_pagefault(inode->v.i_sb); 5701c6fdbd8SKent Overstreet file_update_time(file); 5711c6fdbd8SKent Overstreet 5721c6fdbd8SKent Overstreet /* 5731c6fdbd8SKent Overstreet * Not strictly necessary, but helps avoid dio writes livelocking in 5741c6fdbd8SKent Overstreet * write_invalidate_inode_pages_range() - can drop this if/when we get 5751c6fdbd8SKent Overstreet * a write_invalidate_inode_pages_range() that works without dropping 5761c6fdbd8SKent Overstreet * page lock before invalidating page 5771c6fdbd8SKent Overstreet */ 5781c6fdbd8SKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 5791c6fdbd8SKent Overstreet 5801c6fdbd8SKent Overstreet lock_page(page); 5816cc3535dSKent Overstreet isize = i_size_read(&inode->v); 5826cc3535dSKent Overstreet 5836cc3535dSKent Overstreet if (page->mapping != mapping || page_offset(page) >= isize) { 5841c6fdbd8SKent Overstreet unlock_page(page); 5851c6fdbd8SKent Overstreet ret = VM_FAULT_NOPAGE; 5861c6fdbd8SKent Overstreet goto out; 5871c6fdbd8SKent Overstreet } 5881c6fdbd8SKent Overstreet 589d55460bbSKent Overstreet len = min_t(loff_t, PAGE_SIZE, isize - page_offset(page)); 5906cc3535dSKent Overstreet 5916cc3535dSKent Overstreet if (bch2_page_reservation_get(c, inode, page, &res, 0, len, true)) { 5921c6fdbd8SKent Overstreet unlock_page(page); 5931c6fdbd8SKent Overstreet ret = VM_FAULT_SIGBUS; 5941c6fdbd8SKent Overstreet goto out; 5951c6fdbd8SKent Overstreet } 5961c6fdbd8SKent Overstreet 5976cc3535dSKent Overstreet bch2_set_page_dirty(c, inode, page, &res, 0, len); 5981b783a69SKent Overstreet bch2_page_reservation_put(c, inode, &res); 5991b783a69SKent Overstreet 6001c6fdbd8SKent Overstreet wait_for_stable_page(page); 6011c6fdbd8SKent Overstreet out: 6021c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 6031c6fdbd8SKent Overstreet sb_end_pagefault(inode->v.i_sb); 604d1542e03SKent Overstreet 6051c6fdbd8SKent Overstreet return ret; 6061c6fdbd8SKent Overstreet } 6071c6fdbd8SKent Overstreet 6081c6fdbd8SKent Overstreet void bch2_invalidate_folio(struct folio *folio, size_t offset, size_t length) 6091c6fdbd8SKent Overstreet { 6101c6fdbd8SKent Overstreet if (offset || length < folio_size(folio)) 6111c6fdbd8SKent Overstreet return; 6121c6fdbd8SKent Overstreet 6131c6fdbd8SKent Overstreet bch2_clear_page_bits(&folio->page); 6141c6fdbd8SKent Overstreet } 6151c6fdbd8SKent Overstreet 6161c6fdbd8SKent Overstreet bool bch2_release_folio(struct folio *folio, gfp_t gfp_mask) 6171c6fdbd8SKent Overstreet { 618a6d90385SKent Overstreet if (folio_test_dirty(folio) || folio_test_writeback(folio)) 6191c6fdbd8SKent Overstreet return false; 6201c6fdbd8SKent Overstreet 6211c6fdbd8SKent Overstreet bch2_clear_page_bits(&folio->page); 6221c6fdbd8SKent Overstreet return true; 6231c6fdbd8SKent Overstreet } 6241c6fdbd8SKent Overstreet 6251c6fdbd8SKent Overstreet /* readpage(s): */ 6261c6fdbd8SKent Overstreet 6271c6fdbd8SKent Overstreet static void bch2_readpages_end_io(struct bio *bio) 6281c6fdbd8SKent Overstreet { 6291c6fdbd8SKent Overstreet struct bvec_iter_all iter; 6301c6fdbd8SKent Overstreet struct bio_vec *bv; 6311c6fdbd8SKent Overstreet 6321c6fdbd8SKent Overstreet bio_for_each_segment_all(bv, bio, iter) { 6331c6fdbd8SKent Overstreet struct page *page = bv->bv_page; 6341c6fdbd8SKent Overstreet 6351c6fdbd8SKent Overstreet if (!bio->bi_status) { 6361c6fdbd8SKent Overstreet SetPageUptodate(page); 6371c6fdbd8SKent Overstreet } else { 6381c6fdbd8SKent Overstreet ClearPageUptodate(page); 6391c6fdbd8SKent Overstreet SetPageError(page); 6401c6fdbd8SKent Overstreet } 6411c6fdbd8SKent Overstreet unlock_page(page); 6421c6fdbd8SKent Overstreet } 6431c6fdbd8SKent Overstreet 6441c6fdbd8SKent Overstreet bio_put(bio); 6451c6fdbd8SKent Overstreet } 6461c6fdbd8SKent Overstreet 6471c6fdbd8SKent Overstreet struct readpages_iter { 6481c6fdbd8SKent Overstreet struct address_space *mapping; 6491c6fdbd8SKent Overstreet struct page **pages; 6501c6fdbd8SKent Overstreet unsigned nr_pages; 6511c6fdbd8SKent Overstreet unsigned idx; 6521c6fdbd8SKent Overstreet pgoff_t offset; 6531c6fdbd8SKent Overstreet }; 6541c6fdbd8SKent Overstreet 6551c6fdbd8SKent Overstreet static int readpages_iter_init(struct readpages_iter *iter, 6561c6fdbd8SKent Overstreet struct readahead_control *ractl) 6571c6fdbd8SKent Overstreet { 6581c6fdbd8SKent Overstreet unsigned i, nr_pages = readahead_count(ractl); 6591c6fdbd8SKent Overstreet 6601c6fdbd8SKent Overstreet memset(iter, 0, sizeof(*iter)); 6611c6fdbd8SKent Overstreet 6621c6fdbd8SKent Overstreet iter->mapping = ractl->mapping; 6631c6fdbd8SKent Overstreet iter->offset = readahead_index(ractl); 6641c6fdbd8SKent Overstreet iter->nr_pages = nr_pages; 6651c6fdbd8SKent Overstreet 6661c6fdbd8SKent Overstreet iter->pages = kmalloc_array(nr_pages, sizeof(struct page *), GFP_NOFS); 6671c6fdbd8SKent Overstreet if (!iter->pages) 6681c6fdbd8SKent Overstreet return -ENOMEM; 6691c6fdbd8SKent Overstreet 67089931472SKent Overstreet nr_pages = __readahead_batch(ractl, iter->pages, nr_pages); 6711c6fdbd8SKent Overstreet for (i = 0; i < nr_pages; i++) { 672f57a6a5dSKent Overstreet __bch2_page_state_create(iter->pages[i], __GFP_NOFAIL); 6731c6fdbd8SKent Overstreet put_page(iter->pages[i]); 6741c6fdbd8SKent Overstreet } 6751c6fdbd8SKent Overstreet 6761c6fdbd8SKent Overstreet return 0; 6771c6fdbd8SKent Overstreet } 6781c6fdbd8SKent Overstreet 6791c6fdbd8SKent Overstreet static inline struct page *readpage_iter_next(struct readpages_iter *iter) 6801c6fdbd8SKent Overstreet { 6811c6fdbd8SKent Overstreet if (iter->idx >= iter->nr_pages) 6821c6fdbd8SKent Overstreet return NULL; 6831c6fdbd8SKent Overstreet 6841c6fdbd8SKent Overstreet EBUG_ON(iter->pages[iter->idx]->index != iter->offset + iter->idx); 6851c6fdbd8SKent Overstreet 6861c6fdbd8SKent Overstreet return iter->pages[iter->idx]; 6871c6fdbd8SKent Overstreet } 6881c6fdbd8SKent Overstreet 6891c6fdbd8SKent Overstreet static void bch2_add_page_sectors(struct bio *bio, struct bkey_s_c k) 6901c6fdbd8SKent Overstreet { 6911c6fdbd8SKent Overstreet struct bvec_iter iter; 6921c6fdbd8SKent Overstreet struct bio_vec bv; 69376426098SKent Overstreet unsigned nr_ptrs = k.k->type == KEY_TYPE_reflink_v 6944de77495SKent Overstreet ? 0 : bch2_bkey_nr_ptrs_fully_allocated(k); 6952ba5d38bSKent Overstreet unsigned state = k.k->type == KEY_TYPE_reservation 6962ba5d38bSKent Overstreet ? SECTOR_RESERVED 6972ba5d38bSKent Overstreet : SECTOR_ALLOCATED; 6981c6fdbd8SKent Overstreet 6991c6fdbd8SKent Overstreet bio_for_each_segment(bv, bio, iter) { 700f57a6a5dSKent Overstreet struct bch_page_state *s = bch2_page_state(bv.bv_page); 701f57a6a5dSKent Overstreet unsigned i; 702f81b648dSKent Overstreet 703f57a6a5dSKent Overstreet for (i = bv.bv_offset >> 9; 704f57a6a5dSKent Overstreet i < (bv.bv_offset + bv.bv_len) >> 9; 705f57a6a5dSKent Overstreet i++) { 706f57a6a5dSKent Overstreet s->s[i].nr_replicas = nr_ptrs; 7072ba5d38bSKent Overstreet s->s[i].state = state; 708f57a6a5dSKent Overstreet } 7091c6fdbd8SKent Overstreet } 7101c6fdbd8SKent Overstreet } 7111c6fdbd8SKent Overstreet 71235189e09SKent Overstreet static bool extent_partial_reads_expensive(struct bkey_s_c k) 71335189e09SKent Overstreet { 71435189e09SKent Overstreet struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k); 71535189e09SKent Overstreet struct bch_extent_crc_unpacked crc; 71635189e09SKent Overstreet const union bch_extent_entry *i; 71735189e09SKent Overstreet 71835189e09SKent Overstreet bkey_for_each_crc(k.k, ptrs, crc, i) 71935189e09SKent Overstreet if (crc.csum_type || crc.compression_type) 72035189e09SKent Overstreet return true; 72135189e09SKent Overstreet return false; 72235189e09SKent Overstreet } 72335189e09SKent Overstreet 7241c6fdbd8SKent Overstreet static void readpage_bio_extend(struct readpages_iter *iter, 72576426098SKent Overstreet struct bio *bio, 72676426098SKent Overstreet unsigned sectors_this_extent, 7271c6fdbd8SKent Overstreet bool get_more) 7281c6fdbd8SKent Overstreet { 72976426098SKent Overstreet while (bio_sectors(bio) < sectors_this_extent && 7301c6fdbd8SKent Overstreet bio->bi_vcnt < bio->bi_max_vecs) { 7311c6fdbd8SKent Overstreet pgoff_t page_offset = bio_end_sector(bio) >> PAGE_SECTOR_SHIFT; 7321c6fdbd8SKent Overstreet struct page *page = readpage_iter_next(iter); 7331c6fdbd8SKent Overstreet int ret; 7341c6fdbd8SKent Overstreet 7351c6fdbd8SKent Overstreet if (page) { 7361c6fdbd8SKent Overstreet if (iter->offset + iter->idx != page_offset) 7371c6fdbd8SKent Overstreet break; 7381c6fdbd8SKent Overstreet 7391c6fdbd8SKent Overstreet iter->idx++; 7401c6fdbd8SKent Overstreet } else { 7411c6fdbd8SKent Overstreet if (!get_more) 7421c6fdbd8SKent Overstreet break; 7431c6fdbd8SKent Overstreet 7441c6fdbd8SKent Overstreet page = xa_load(&iter->mapping->i_pages, page_offset); 7451c6fdbd8SKent Overstreet if (page && !xa_is_value(page)) 7461c6fdbd8SKent Overstreet break; 7471c6fdbd8SKent Overstreet 7481c6fdbd8SKent Overstreet page = __page_cache_alloc(readahead_gfp_mask(iter->mapping)); 7491c6fdbd8SKent Overstreet if (!page) 7501c6fdbd8SKent Overstreet break; 7511c6fdbd8SKent Overstreet 752f57a6a5dSKent Overstreet if (!__bch2_page_state_create(page, 0)) { 753f57a6a5dSKent Overstreet put_page(page); 754f57a6a5dSKent Overstreet break; 755f57a6a5dSKent Overstreet } 7561c6fdbd8SKent Overstreet 7571c6fdbd8SKent Overstreet ret = add_to_page_cache_lru(page, iter->mapping, 7581c6fdbd8SKent Overstreet page_offset, GFP_NOFS); 7591c6fdbd8SKent Overstreet if (ret) { 760f57a6a5dSKent Overstreet __bch2_page_state_release(page); 7611c6fdbd8SKent Overstreet put_page(page); 7621c6fdbd8SKent Overstreet break; 7631c6fdbd8SKent Overstreet } 7641c6fdbd8SKent Overstreet 7651c6fdbd8SKent Overstreet put_page(page); 7661c6fdbd8SKent Overstreet } 7671c6fdbd8SKent Overstreet 768885678f6SKent Overstreet BUG_ON(!bio_add_page(bio, page, PAGE_SIZE, 0)); 7691c6fdbd8SKent Overstreet } 7701c6fdbd8SKent Overstreet } 7711c6fdbd8SKent Overstreet 7720f238367SKent Overstreet static void bchfs_read(struct btree_trans *trans, struct btree_iter *iter, 7731c6fdbd8SKent Overstreet struct bch_read_bio *rbio, u64 inum, 7741c6fdbd8SKent Overstreet struct readpages_iter *readpages_iter) 7751c6fdbd8SKent Overstreet { 7760f238367SKent Overstreet struct bch_fs *c = trans->c; 77707a1006aSKent Overstreet struct bkey_buf sk; 7781c6fdbd8SKent Overstreet int flags = BCH_READ_RETRY_IF_STALE| 7791c6fdbd8SKent Overstreet BCH_READ_MAY_PROMOTE; 78076426098SKent Overstreet int ret = 0; 7811c6fdbd8SKent Overstreet 7821c6fdbd8SKent Overstreet rbio->c = c; 7831c6fdbd8SKent Overstreet rbio->start_time = local_clock(); 78435189e09SKent Overstreet 78507a1006aSKent Overstreet bch2_bkey_buf_init(&sk); 78676426098SKent Overstreet retry: 787700c25b3SKent Overstreet bch2_trans_begin(trans); 788700c25b3SKent Overstreet 7891c6fdbd8SKent Overstreet while (1) { 7901c6fdbd8SKent Overstreet struct bkey_s_c k; 79176426098SKent Overstreet unsigned bytes, sectors, offset_into_extent; 7925ff75ccbSKent Overstreet enum btree_id data_btree = BTREE_ID_extents; 7931c6fdbd8SKent Overstreet 7943737e0ddSKent Overstreet /* 7953737e0ddSKent Overstreet * read_extent -> io_time_reset may cause a transaction restart 7963737e0ddSKent Overstreet * without returning an error, we need to check for that here: 7973737e0ddSKent Overstreet */ 7983737e0ddSKent Overstreet if (!bch2_trans_relock(trans)) { 7993737e0ddSKent Overstreet ret = -EINTR; 8003737e0ddSKent Overstreet break; 8013737e0ddSKent Overstreet } 8023737e0ddSKent Overstreet 80306ed8558SKent Overstreet bch2_btree_iter_set_pos(iter, 80406ed8558SKent Overstreet POS(inum, rbio->bio.bi_iter.bi_sector)); 8051c6fdbd8SKent Overstreet 8061c6fdbd8SKent Overstreet k = bch2_btree_iter_peek_slot(iter); 80776426098SKent Overstreet ret = bkey_err(k); 80876426098SKent Overstreet if (ret) 80976426098SKent Overstreet break; 8101c6fdbd8SKent Overstreet 81106ed8558SKent Overstreet offset_into_extent = iter->pos.offset - 81206ed8558SKent Overstreet bkey_start_offset(k.k); 81376426098SKent Overstreet sectors = k.k->size - offset_into_extent; 81476426098SKent Overstreet 81507a1006aSKent Overstreet bch2_bkey_buf_reassemble(&sk, c, k); 81613dcd4abSKent Overstreet 8175ff75ccbSKent Overstreet ret = bch2_read_indirect_extent(trans, &data_btree, 81822d8a33dSYuxuan Shui &offset_into_extent, &sk); 81976426098SKent Overstreet if (ret) 82076426098SKent Overstreet break; 82176426098SKent Overstreet 82213dcd4abSKent Overstreet k = bkey_i_to_s_c(sk.k); 82313dcd4abSKent Overstreet 82476426098SKent Overstreet sectors = min(sectors, k.k->size - offset_into_extent); 82576426098SKent Overstreet 82676426098SKent Overstreet bch2_trans_unlock(trans); 82706ed8558SKent Overstreet 82835189e09SKent Overstreet if (readpages_iter) 82935189e09SKent Overstreet readpage_bio_extend(readpages_iter, &rbio->bio, sectors, 83035189e09SKent Overstreet extent_partial_reads_expensive(k)); 8311c6fdbd8SKent Overstreet 83276426098SKent Overstreet bytes = min(sectors, bio_sectors(&rbio->bio)) << 9; 83306ed8558SKent Overstreet swap(rbio->bio.bi_iter.bi_size, bytes); 8341c6fdbd8SKent Overstreet 83506ed8558SKent Overstreet if (rbio->bio.bi_iter.bi_size == bytes) 8361c6fdbd8SKent Overstreet flags |= BCH_READ_LAST_FRAGMENT; 8371c6fdbd8SKent Overstreet 8381c6fdbd8SKent Overstreet if (bkey_extent_is_allocation(k.k)) 83906ed8558SKent Overstreet bch2_add_page_sectors(&rbio->bio, k); 8401c6fdbd8SKent Overstreet 8415ff75ccbSKent Overstreet bch2_read_extent(trans, rbio, iter->pos, 8425ff75ccbSKent Overstreet data_btree, k, offset_into_extent, flags); 8431c6fdbd8SKent Overstreet 8441c6fdbd8SKent Overstreet if (flags & BCH_READ_LAST_FRAGMENT) 84535189e09SKent Overstreet break; 8461c6fdbd8SKent Overstreet 84706ed8558SKent Overstreet swap(rbio->bio.bi_iter.bi_size, bytes); 84806ed8558SKent Overstreet bio_advance(&rbio->bio, bytes); 8491c6fdbd8SKent Overstreet } 85076426098SKent Overstreet 85176426098SKent Overstreet if (ret == -EINTR) 85276426098SKent Overstreet goto retry; 85376426098SKent Overstreet 85435189e09SKent Overstreet if (ret) { 8550fefe8d8SKent Overstreet bch_err_inum_ratelimited(c, inum, 8560fefe8d8SKent Overstreet "read error %i from btree lookup", ret); 8570fefe8d8SKent Overstreet rbio->bio.bi_status = BLK_STS_IOERR; 85876426098SKent Overstreet bio_endio(&rbio->bio); 8591c6fdbd8SKent Overstreet } 8601c6fdbd8SKent Overstreet 86107a1006aSKent Overstreet bch2_bkey_buf_exit(&sk, c); 86235189e09SKent Overstreet } 86335189e09SKent Overstreet 8641c6fdbd8SKent Overstreet void bch2_readahead(struct readahead_control *ractl) 8651c6fdbd8SKent Overstreet { 8661c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(ractl->mapping->host); 8671c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 8689a3df993SKent Overstreet struct bch_io_opts opts = io_opts(c, &inode->ei_inode); 869424eb881SKent Overstreet struct btree_trans trans; 870*67e0dd8fSKent Overstreet struct btree_iter iter; 8711c6fdbd8SKent Overstreet struct page *page; 8721c6fdbd8SKent Overstreet struct readpages_iter readpages_iter; 8731c6fdbd8SKent Overstreet int ret; 8741c6fdbd8SKent Overstreet 8751c6fdbd8SKent Overstreet ret = readpages_iter_init(&readpages_iter, ractl); 8761c6fdbd8SKent Overstreet BUG_ON(ret); 8771c6fdbd8SKent Overstreet 87820bceecbSKent Overstreet bch2_trans_init(&trans, c, 0, 0); 879*67e0dd8fSKent Overstreet bch2_trans_iter_init(&trans, &iter, BTREE_ID_extents, POS_MIN, 8801c6fdbd8SKent Overstreet BTREE_ITER_SLOTS); 8811c6fdbd8SKent Overstreet 8821c6fdbd8SKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 8831c6fdbd8SKent Overstreet 8841c6fdbd8SKent Overstreet while ((page = readpage_iter_next(&readpages_iter))) { 8851c6fdbd8SKent Overstreet pgoff_t index = readpages_iter.offset + readpages_iter.idx; 8861c6fdbd8SKent Overstreet unsigned n = min_t(unsigned, 8871c6fdbd8SKent Overstreet readpages_iter.nr_pages - 8881c6fdbd8SKent Overstreet readpages_iter.idx, 8891c6fdbd8SKent Overstreet BIO_MAX_VECS); 8901c6fdbd8SKent Overstreet struct bch_read_bio *rbio = 8911c6fdbd8SKent Overstreet rbio_init(bio_alloc_bioset(NULL, n, REQ_OP_READ, 8921c6fdbd8SKent Overstreet GFP_NOFS, &c->bio_read), 8931c6fdbd8SKent Overstreet opts); 8941c6fdbd8SKent Overstreet 8951c6fdbd8SKent Overstreet readpages_iter.idx++; 8961c6fdbd8SKent Overstreet 8971c6fdbd8SKent Overstreet rbio->bio.bi_iter.bi_sector = (sector_t) index << PAGE_SECTOR_SHIFT; 8981c6fdbd8SKent Overstreet rbio->bio.bi_end_io = bch2_readpages_end_io; 899885678f6SKent Overstreet BUG_ON(!bio_add_page(&rbio->bio, page, PAGE_SIZE, 0)); 9001c6fdbd8SKent Overstreet 901*67e0dd8fSKent Overstreet bchfs_read(&trans, &iter, rbio, inode->v.i_ino, 9020f238367SKent Overstreet &readpages_iter); 9031c6fdbd8SKent Overstreet } 9041c6fdbd8SKent Overstreet 9051c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 906424eb881SKent Overstreet 907*67e0dd8fSKent Overstreet bch2_trans_iter_exit(&trans, &iter); 908424eb881SKent Overstreet bch2_trans_exit(&trans); 9091c6fdbd8SKent Overstreet kfree(readpages_iter.pages); 9101c6fdbd8SKent Overstreet } 9111c6fdbd8SKent Overstreet 9121c6fdbd8SKent Overstreet static void __bchfs_readpage(struct bch_fs *c, struct bch_read_bio *rbio, 9131c6fdbd8SKent Overstreet u64 inum, struct page *page) 9141c6fdbd8SKent Overstreet { 915424eb881SKent Overstreet struct btree_trans trans; 916*67e0dd8fSKent Overstreet struct btree_iter iter; 9171c6fdbd8SKent Overstreet 918f57a6a5dSKent Overstreet bch2_page_state_create(page, __GFP_NOFAIL); 9191c6fdbd8SKent Overstreet 9201c6fdbd8SKent Overstreet rbio->bio.bi_opf = REQ_OP_READ|REQ_SYNC; 9217f5e31e1SKent Overstreet rbio->bio.bi_iter.bi_sector = 9227f5e31e1SKent Overstreet (sector_t) page->index << PAGE_SECTOR_SHIFT; 9237f5e31e1SKent Overstreet BUG_ON(!bio_add_page(&rbio->bio, page, PAGE_SIZE, 0)); 9241c6fdbd8SKent Overstreet 92520bceecbSKent Overstreet bch2_trans_init(&trans, c, 0, 0); 926*67e0dd8fSKent Overstreet bch2_trans_iter_init(&trans, &iter, BTREE_ID_extents, POS_MIN, 9271c6fdbd8SKent Overstreet BTREE_ITER_SLOTS); 928424eb881SKent Overstreet 929*67e0dd8fSKent Overstreet bchfs_read(&trans, &iter, rbio, inum, NULL); 930424eb881SKent Overstreet 931*67e0dd8fSKent Overstreet bch2_trans_iter_exit(&trans, &iter); 932424eb881SKent Overstreet bch2_trans_exit(&trans); 9331c6fdbd8SKent Overstreet } 9341c6fdbd8SKent Overstreet 9351c6fdbd8SKent Overstreet static void bch2_read_single_page_end_io(struct bio *bio) 9361c6fdbd8SKent Overstreet { 9371c6fdbd8SKent Overstreet complete(bio->bi_private); 9381c6fdbd8SKent Overstreet } 9391c6fdbd8SKent Overstreet 9401c6fdbd8SKent Overstreet static int bch2_read_single_page(struct page *page, 9411c6fdbd8SKent Overstreet struct address_space *mapping) 9421c6fdbd8SKent Overstreet { 9431c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(mapping->host); 9441c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 9451c6fdbd8SKent Overstreet struct bch_read_bio *rbio; 9461c6fdbd8SKent Overstreet int ret; 9471c6fdbd8SKent Overstreet DECLARE_COMPLETION_ONSTACK(done); 9481c6fdbd8SKent Overstreet 9491c6fdbd8SKent Overstreet rbio = rbio_init(bio_alloc_bioset(NULL, 1, REQ_OP_READ, GFP_NOFS, &c->bio_read), 9509a3df993SKent Overstreet io_opts(c, &inode->ei_inode)); 9511c6fdbd8SKent Overstreet rbio->bio.bi_private = &done; 9521c6fdbd8SKent Overstreet rbio->bio.bi_end_io = bch2_read_single_page_end_io; 9531c6fdbd8SKent Overstreet 9541c6fdbd8SKent Overstreet __bchfs_readpage(c, rbio, inode->v.i_ino, page); 9551c6fdbd8SKent Overstreet wait_for_completion(&done); 9561c6fdbd8SKent Overstreet 9571c6fdbd8SKent Overstreet ret = blk_status_to_errno(rbio->bio.bi_status); 9581c6fdbd8SKent Overstreet bio_put(&rbio->bio); 9591c6fdbd8SKent Overstreet 9601c6fdbd8SKent Overstreet if (ret < 0) 9611c6fdbd8SKent Overstreet return ret; 9621c6fdbd8SKent Overstreet 9631c6fdbd8SKent Overstreet SetPageUptodate(page); 9641c6fdbd8SKent Overstreet return 0; 9651c6fdbd8SKent Overstreet } 9661c6fdbd8SKent Overstreet 9671c6fdbd8SKent Overstreet int bch2_read_folio(struct file *file, struct folio *folio) 9681c6fdbd8SKent Overstreet { 9691c6fdbd8SKent Overstreet struct page *page = &folio->page; 9701c6fdbd8SKent Overstreet int ret; 9711c6fdbd8SKent Overstreet 9721c6fdbd8SKent Overstreet ret = bch2_read_single_page(page, page->mapping); 9731c6fdbd8SKent Overstreet folio_unlock(folio); 9741c6fdbd8SKent Overstreet return ret; 9751c6fdbd8SKent Overstreet } 9761c6fdbd8SKent Overstreet 9771c6fdbd8SKent Overstreet /* writepages: */ 9781c6fdbd8SKent Overstreet 9791c6fdbd8SKent Overstreet struct bch_writepage_state { 9801c6fdbd8SKent Overstreet struct bch_writepage_io *io; 9811c6fdbd8SKent Overstreet struct bch_io_opts opts; 9821c6fdbd8SKent Overstreet }; 9831c6fdbd8SKent Overstreet 9841c6fdbd8SKent Overstreet static inline struct bch_writepage_state bch_writepage_state_init(struct bch_fs *c, 9851c6fdbd8SKent Overstreet struct bch_inode_info *inode) 9861c6fdbd8SKent Overstreet { 9879a3df993SKent Overstreet return (struct bch_writepage_state) { 9889a3df993SKent Overstreet .opts = io_opts(c, &inode->ei_inode) 9899a3df993SKent Overstreet }; 9901c6fdbd8SKent Overstreet } 9911c6fdbd8SKent Overstreet 9929f311f21SKent Overstreet static void bch2_writepage_io_done(struct bch_write_op *op) 9931c6fdbd8SKent Overstreet { 9949f311f21SKent Overstreet struct bch_writepage_io *io = 9959f311f21SKent Overstreet container_of(op, struct bch_writepage_io, op); 9969a3df993SKent Overstreet struct bch_fs *c = io->op.c; 9979a3df993SKent Overstreet struct bio *bio = &io->op.wbio.bio; 9981c6fdbd8SKent Overstreet struct bvec_iter_all iter; 9991c6fdbd8SKent Overstreet struct bio_vec *bvec; 1000b3fce09cSKent Overstreet unsigned i; 10011c6fdbd8SKent Overstreet 1002ef1b2092SKent Overstreet up(&io->op.c->io_in_flight); 1003ef1b2092SKent Overstreet 10049a3df993SKent Overstreet if (io->op.error) { 100533c74e41SKent Overstreet set_bit(EI_INODE_ERROR, &io->inode->ei_flags); 100633c74e41SKent Overstreet 100775812e70SKent Overstreet bio_for_each_segment_all(bvec, bio, iter) { 1008b3fce09cSKent Overstreet struct bch_page_state *s; 1009b3fce09cSKent Overstreet 10101c6fdbd8SKent Overstreet SetPageError(bvec->bv_page); 101175812e70SKent Overstreet mapping_set_error(bvec->bv_page->mapping, -EIO); 1012b3fce09cSKent Overstreet 10133826ee0bSKent Overstreet s = __bch2_page_state(bvec->bv_page); 10143826ee0bSKent Overstreet spin_lock(&s->lock); 1015b3fce09cSKent Overstreet for (i = 0; i < PAGE_SECTORS; i++) 1016b3fce09cSKent Overstreet s->s[i].nr_replicas = 0; 10173826ee0bSKent Overstreet spin_unlock(&s->lock); 101875812e70SKent Overstreet } 10191c6fdbd8SKent Overstreet } 10201c6fdbd8SKent Overstreet 10214be1a412SKent Overstreet if (io->op.flags & BCH_WRITE_WROTE_DATA_INLINE) { 10224be1a412SKent Overstreet bio_for_each_segment_all(bvec, bio, iter) { 10234be1a412SKent Overstreet struct bch_page_state *s; 10244be1a412SKent Overstreet 10254be1a412SKent Overstreet s = __bch2_page_state(bvec->bv_page); 10264be1a412SKent Overstreet spin_lock(&s->lock); 10274be1a412SKent Overstreet for (i = 0; i < PAGE_SECTORS; i++) 10284be1a412SKent Overstreet s->s[i].nr_replicas = 0; 10294be1a412SKent Overstreet spin_unlock(&s->lock); 10304be1a412SKent Overstreet } 10314be1a412SKent Overstreet } 10324be1a412SKent Overstreet 10331c6fdbd8SKent Overstreet /* 10341c6fdbd8SKent Overstreet * racing with fallocate can cause us to add fewer sectors than 10351c6fdbd8SKent Overstreet * expected - but we shouldn't add more sectors than expected: 10361c6fdbd8SKent Overstreet */ 10379a3df993SKent Overstreet BUG_ON(io->op.i_sectors_delta > 0); 10381c6fdbd8SKent Overstreet 10391c6fdbd8SKent Overstreet /* 10401c6fdbd8SKent Overstreet * (error (due to going RO) halfway through a page can screw that up 10411c6fdbd8SKent Overstreet * slightly) 10421c6fdbd8SKent Overstreet * XXX wtf? 10439a3df993SKent Overstreet BUG_ON(io->op.op.i_sectors_delta >= PAGE_SECTORS); 10441c6fdbd8SKent Overstreet */ 10451c6fdbd8SKent Overstreet 10461c6fdbd8SKent Overstreet /* 10471c6fdbd8SKent Overstreet * PageWriteback is effectively our ref on the inode - fixup i_blocks 10481c6fdbd8SKent Overstreet * before calling end_page_writeback: 10491c6fdbd8SKent Overstreet */ 10509a3df993SKent Overstreet i_sectors_acct(c, io->inode, NULL, io->op.i_sectors_delta); 10511c6fdbd8SKent Overstreet 10527f5e31e1SKent Overstreet bio_for_each_segment_all(bvec, bio, iter) { 10537f5e31e1SKent Overstreet struct bch_page_state *s = __bch2_page_state(bvec->bv_page); 10547f5e31e1SKent Overstreet 10557f5e31e1SKent Overstreet if (atomic_dec_and_test(&s->write_count)) 10561c6fdbd8SKent Overstreet end_page_writeback(bvec->bv_page); 10577f5e31e1SKent Overstreet } 10581c6fdbd8SKent Overstreet 10599f311f21SKent Overstreet bio_put(&io->op.wbio.bio); 10601c6fdbd8SKent Overstreet } 10611c6fdbd8SKent Overstreet 10621c6fdbd8SKent Overstreet static void bch2_writepage_do_io(struct bch_writepage_state *w) 10631c6fdbd8SKent Overstreet { 10641c6fdbd8SKent Overstreet struct bch_writepage_io *io = w->io; 10651c6fdbd8SKent Overstreet 1066ef1b2092SKent Overstreet down(&io->op.c->io_in_flight); 1067ef1b2092SKent Overstreet 10681c6fdbd8SKent Overstreet w->io = NULL; 10699f311f21SKent Overstreet closure_call(&io->op.cl, bch2_write, NULL, NULL); 10701c6fdbd8SKent Overstreet } 10711c6fdbd8SKent Overstreet 10721c6fdbd8SKent Overstreet /* 10731c6fdbd8SKent Overstreet * Get a bch_writepage_io and add @page to it - appending to an existing one if 10741c6fdbd8SKent Overstreet * possible, else allocating a new one: 10751c6fdbd8SKent Overstreet */ 10761c6fdbd8SKent Overstreet static void bch2_writepage_io_alloc(struct bch_fs *c, 107750fe5bd6SKent Overstreet struct writeback_control *wbc, 10781c6fdbd8SKent Overstreet struct bch_writepage_state *w, 10791c6fdbd8SKent Overstreet struct bch_inode_info *inode, 10807f5e31e1SKent Overstreet u64 sector, 10811c6fdbd8SKent Overstreet unsigned nr_replicas) 10821c6fdbd8SKent Overstreet { 10831c6fdbd8SKent Overstreet struct bch_write_op *op; 10841c6fdbd8SKent Overstreet 10851c6fdbd8SKent Overstreet w->io = container_of(bio_alloc_bioset(NULL, BIO_MAX_VECS, 10861c6fdbd8SKent Overstreet REQ_OP_WRITE, 10871c6fdbd8SKent Overstreet GFP_NOFS, 10881c6fdbd8SKent Overstreet &c->writepage_bioset), 10899a3df993SKent Overstreet struct bch_writepage_io, op.wbio.bio); 10901c6fdbd8SKent Overstreet 10919a3df993SKent Overstreet w->io->inode = inode; 10929a3df993SKent Overstreet op = &w->io->op; 10939a3df993SKent Overstreet bch2_write_op_init(op, c, w->opts); 10949a3df993SKent Overstreet op->target = w->opts.foreground_target; 10959a3df993SKent Overstreet op_journal_seq_set(op, &inode->ei_journal_seq); 10961c6fdbd8SKent Overstreet op->nr_replicas = nr_replicas; 10971c6fdbd8SKent Overstreet op->res.nr_replicas = nr_replicas; 10981c6fdbd8SKent Overstreet op->write_point = writepoint_hashed(inode->ei_last_dirtied); 10997f5e31e1SKent Overstreet op->pos = POS(inode->v.i_ino, sector); 11009f311f21SKent Overstreet op->end_io = bch2_writepage_io_done; 11017f5e31e1SKent Overstreet op->wbio.bio.bi_iter.bi_sector = sector; 110250fe5bd6SKent Overstreet op->wbio.bio.bi_opf = wbc_to_write_flags(wbc); 11031c6fdbd8SKent Overstreet } 11041c6fdbd8SKent Overstreet 11051c6fdbd8SKent Overstreet static int __bch2_writepage(struct folio *folio, 11061c6fdbd8SKent Overstreet struct writeback_control *wbc, 11071c6fdbd8SKent Overstreet void *data) 11081c6fdbd8SKent Overstreet { 11091c6fdbd8SKent Overstreet struct page *page = &folio->page; 11101c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(page->mapping->host); 11111c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 11121c6fdbd8SKent Overstreet struct bch_writepage_state *w = data; 11137f5e31e1SKent Overstreet struct bch_page_state *s, orig; 11147f5e31e1SKent Overstreet unsigned i, offset, nr_replicas_this_write = U32_MAX; 11151c6fdbd8SKent Overstreet loff_t i_size = i_size_read(&inode->v); 11161c6fdbd8SKent Overstreet pgoff_t end_index = i_size >> PAGE_SHIFT; 1117e1036a2aSKent Overstreet int ret; 11181c6fdbd8SKent Overstreet 11191c6fdbd8SKent Overstreet EBUG_ON(!PageUptodate(page)); 11201c6fdbd8SKent Overstreet 11211c6fdbd8SKent Overstreet /* Is the page fully inside i_size? */ 11221c6fdbd8SKent Overstreet if (page->index < end_index) 11231c6fdbd8SKent Overstreet goto do_io; 11241c6fdbd8SKent Overstreet 11251c6fdbd8SKent Overstreet /* Is the page fully outside i_size? (truncate in progress) */ 11261c6fdbd8SKent Overstreet offset = i_size & (PAGE_SIZE - 1); 11271c6fdbd8SKent Overstreet if (page->index > end_index || !offset) { 11281c6fdbd8SKent Overstreet unlock_page(page); 11291c6fdbd8SKent Overstreet return 0; 11301c6fdbd8SKent Overstreet } 11311c6fdbd8SKent Overstreet 11321c6fdbd8SKent Overstreet /* 11331c6fdbd8SKent Overstreet * The page straddles i_size. It must be zeroed out on each and every 11341c6fdbd8SKent Overstreet * writepage invocation because it may be mmapped. "A file is mapped 11351c6fdbd8SKent Overstreet * in multiples of the page size. For a file that is not a multiple of 11361c6fdbd8SKent Overstreet * the page size, the remaining memory is zeroed when mapped, and 11371c6fdbd8SKent Overstreet * writes to that region are not written out to the file." 11381c6fdbd8SKent Overstreet */ 11391c6fdbd8SKent Overstreet zero_user_segment(page, offset, PAGE_SIZE); 11401c6fdbd8SKent Overstreet do_io: 1141f57a6a5dSKent Overstreet s = bch2_page_state_create(page, __GFP_NOFAIL); 1142f81b648dSKent Overstreet 1143f57a6a5dSKent Overstreet ret = bch2_get_page_disk_reservation(c, inode, page, true); 1144e1036a2aSKent Overstreet if (ret) { 1145e1036a2aSKent Overstreet SetPageError(page); 1146e1036a2aSKent Overstreet mapping_set_error(page->mapping, ret); 1147e1036a2aSKent Overstreet unlock_page(page); 1148e1036a2aSKent Overstreet return 0; 1149e1036a2aSKent Overstreet } 1150e1036a2aSKent Overstreet 11517f5e31e1SKent Overstreet /* Before unlocking the page, get copy of reservations: */ 11527f5e31e1SKent Overstreet orig = *s; 11537f5e31e1SKent Overstreet 11547f5e31e1SKent Overstreet for (i = 0; i < PAGE_SECTORS; i++) { 11552ba5d38bSKent Overstreet if (s->s[i].state < SECTOR_DIRTY) 11567f5e31e1SKent Overstreet continue; 11577f5e31e1SKent Overstreet 1158f81b648dSKent Overstreet nr_replicas_this_write = 1159f57a6a5dSKent Overstreet min_t(unsigned, nr_replicas_this_write, 1160f57a6a5dSKent Overstreet s->s[i].nr_replicas + 1161f57a6a5dSKent Overstreet s->s[i].replicas_reserved); 11627f5e31e1SKent Overstreet } 11631c6fdbd8SKent Overstreet 1164f57a6a5dSKent Overstreet for (i = 0; i < PAGE_SECTORS; i++) { 11652ba5d38bSKent Overstreet if (s->s[i].state < SECTOR_DIRTY) 11667f5e31e1SKent Overstreet continue; 11677f5e31e1SKent Overstreet 1168f57a6a5dSKent Overstreet s->s[i].nr_replicas = w->opts.compression 1169f57a6a5dSKent Overstreet ? 0 : nr_replicas_this_write; 1170e1036a2aSKent Overstreet 1171f57a6a5dSKent Overstreet s->s[i].replicas_reserved = 0; 1172f57a6a5dSKent Overstreet s->s[i].state = SECTOR_ALLOCATED; 1173f57a6a5dSKent Overstreet } 11741c6fdbd8SKent Overstreet 11757f5e31e1SKent Overstreet BUG_ON(atomic_read(&s->write_count)); 11767f5e31e1SKent Overstreet atomic_set(&s->write_count, 1); 11777f5e31e1SKent Overstreet 11781c6fdbd8SKent Overstreet BUG_ON(PageWriteback(page)); 11791c6fdbd8SKent Overstreet set_page_writeback(page); 11807f5e31e1SKent Overstreet 11811c6fdbd8SKent Overstreet unlock_page(page); 11821c6fdbd8SKent Overstreet 11837f5e31e1SKent Overstreet offset = 0; 11847f5e31e1SKent Overstreet while (1) { 11857f5e31e1SKent Overstreet unsigned sectors = 1, dirty_sectors = 0, reserved_sectors = 0; 11867f5e31e1SKent Overstreet u64 sector; 11877f5e31e1SKent Overstreet 11887f5e31e1SKent Overstreet while (offset < PAGE_SECTORS && 11892ba5d38bSKent Overstreet orig.s[offset].state < SECTOR_DIRTY) 11907f5e31e1SKent Overstreet offset++; 11917f5e31e1SKent Overstreet 11927f5e31e1SKent Overstreet if (offset == PAGE_SECTORS) 11937f5e31e1SKent Overstreet break; 11947f5e31e1SKent Overstreet 11957f5e31e1SKent Overstreet sector = ((u64) page->index << PAGE_SECTOR_SHIFT) + offset; 11967f5e31e1SKent Overstreet 11977f5e31e1SKent Overstreet while (offset + sectors < PAGE_SECTORS && 11982ba5d38bSKent Overstreet orig.s[offset + sectors].state >= SECTOR_DIRTY) 11997f5e31e1SKent Overstreet sectors++; 12007f5e31e1SKent Overstreet 12017f5e31e1SKent Overstreet for (i = offset; i < offset + sectors; i++) { 12027f5e31e1SKent Overstreet reserved_sectors += orig.s[i].replicas_reserved; 12037f5e31e1SKent Overstreet dirty_sectors += orig.s[i].state == SECTOR_DIRTY; 12047f5e31e1SKent Overstreet } 12057f5e31e1SKent Overstreet 12061c6fdbd8SKent Overstreet if (w->io && 12079a3df993SKent Overstreet (w->io->op.res.nr_replicas != nr_replicas_this_write || 12089a3df993SKent Overstreet bio_full(&w->io->op.wbio.bio, PAGE_SIZE) || 1209f59b3464SKent Overstreet w->io->op.wbio.bio.bi_iter.bi_size + (sectors << 9) >= 1210f59b3464SKent Overstreet (BIO_MAX_VECS * PAGE_SIZE) || 12119a3df993SKent Overstreet bio_end_sector(&w->io->op.wbio.bio) != sector)) 12121c6fdbd8SKent Overstreet bch2_writepage_do_io(w); 12131c6fdbd8SKent Overstreet 12141c6fdbd8SKent Overstreet if (!w->io) 121550fe5bd6SKent Overstreet bch2_writepage_io_alloc(c, wbc, w, inode, sector, 1216f81b648dSKent Overstreet nr_replicas_this_write); 12171c6fdbd8SKent Overstreet 12187f5e31e1SKent Overstreet atomic_inc(&s->write_count); 12197f5e31e1SKent Overstreet 12209a3df993SKent Overstreet BUG_ON(inode != w->io->inode); 12219a3df993SKent Overstreet BUG_ON(!bio_add_page(&w->io->op.wbio.bio, page, 12227f5e31e1SKent Overstreet sectors << 9, offset << 9)); 12231c6fdbd8SKent Overstreet 12246cc3535dSKent Overstreet /* Check for writing past i_size: */ 12259a3df993SKent Overstreet WARN_ON((bio_end_sector(&w->io->op.wbio.bio) << 9) > 12266cc3535dSKent Overstreet round_up(i_size, block_bytes(c))); 12276cc3535dSKent Overstreet 12289a3df993SKent Overstreet w->io->op.res.sectors += reserved_sectors; 12299a3df993SKent Overstreet w->io->op.i_sectors_delta -= dirty_sectors; 12301c6fdbd8SKent Overstreet w->io->op.new_i_size = i_size; 12311c6fdbd8SKent Overstreet 12327f5e31e1SKent Overstreet offset += sectors; 12337f5e31e1SKent Overstreet } 12347f5e31e1SKent Overstreet 12357f5e31e1SKent Overstreet if (atomic_dec_and_test(&s->write_count)) 12367f5e31e1SKent Overstreet end_page_writeback(page); 12377f5e31e1SKent Overstreet 12381c6fdbd8SKent Overstreet return 0; 12391c6fdbd8SKent Overstreet } 12401c6fdbd8SKent Overstreet 12411c6fdbd8SKent Overstreet int bch2_writepages(struct address_space *mapping, struct writeback_control *wbc) 12421c6fdbd8SKent Overstreet { 12431c6fdbd8SKent Overstreet struct bch_fs *c = mapping->host->i_sb->s_fs_info; 12441c6fdbd8SKent Overstreet struct bch_writepage_state w = 12451c6fdbd8SKent Overstreet bch_writepage_state_init(c, to_bch_ei(mapping->host)); 12461c6fdbd8SKent Overstreet struct blk_plug plug; 12471c6fdbd8SKent Overstreet int ret; 12481c6fdbd8SKent Overstreet 12491c6fdbd8SKent Overstreet blk_start_plug(&plug); 12501c6fdbd8SKent Overstreet ret = write_cache_pages(mapping, wbc, __bch2_writepage, &w); 12511c6fdbd8SKent Overstreet if (w.io) 12521c6fdbd8SKent Overstreet bch2_writepage_do_io(&w); 12531c6fdbd8SKent Overstreet blk_finish_plug(&plug); 12541c6fdbd8SKent Overstreet return ret; 12551c6fdbd8SKent Overstreet } 12561c6fdbd8SKent Overstreet 12571c6fdbd8SKent Overstreet int bch2_writepage(struct page *page, struct writeback_control *wbc) 12581c6fdbd8SKent Overstreet { 12591c6fdbd8SKent Overstreet struct bch_fs *c = page->mapping->host->i_sb->s_fs_info; 12601c6fdbd8SKent Overstreet struct bch_writepage_state w = 12611c6fdbd8SKent Overstreet bch_writepage_state_init(c, to_bch_ei(page->mapping->host)); 12621c6fdbd8SKent Overstreet int ret; 12631c6fdbd8SKent Overstreet 12641c6fdbd8SKent Overstreet ret = __bch2_writepage(page_folio(page), wbc, &w); 12651c6fdbd8SKent Overstreet if (w.io) 12661c6fdbd8SKent Overstreet bch2_writepage_do_io(&w); 12671c6fdbd8SKent Overstreet 12681c6fdbd8SKent Overstreet return ret; 12691c6fdbd8SKent Overstreet } 12701c6fdbd8SKent Overstreet 12711c6fdbd8SKent Overstreet /* buffered writes: */ 12721c6fdbd8SKent Overstreet 12731c6fdbd8SKent Overstreet int bch2_write_begin(struct file *file, struct address_space *mapping, 12741c6fdbd8SKent Overstreet loff_t pos, unsigned len, 12751c6fdbd8SKent Overstreet struct page **pagep, void **fsdata) 12761c6fdbd8SKent Overstreet { 12771c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(mapping->host); 12781c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 1279d1542e03SKent Overstreet struct bch2_page_reservation *res; 12801c6fdbd8SKent Overstreet pgoff_t index = pos >> PAGE_SHIFT; 12811c6fdbd8SKent Overstreet unsigned offset = pos & (PAGE_SIZE - 1); 12821c6fdbd8SKent Overstreet struct page *page; 12831c6fdbd8SKent Overstreet int ret = -ENOMEM; 12841c6fdbd8SKent Overstreet 1285d1542e03SKent Overstreet res = kmalloc(sizeof(*res), GFP_KERNEL); 1286d1542e03SKent Overstreet if (!res) 1287d1542e03SKent Overstreet return -ENOMEM; 1288d1542e03SKent Overstreet 1289d1542e03SKent Overstreet bch2_page_reservation_init(c, inode, res); 1290d1542e03SKent Overstreet *fsdata = res; 12911c6fdbd8SKent Overstreet 12921c6fdbd8SKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 12931c6fdbd8SKent Overstreet 12941c6fdbd8SKent Overstreet page = grab_cache_page_write_begin(mapping, index); 12951c6fdbd8SKent Overstreet if (!page) 12961c6fdbd8SKent Overstreet goto err_unlock; 12971c6fdbd8SKent Overstreet 12981c6fdbd8SKent Overstreet if (PageUptodate(page)) 12991c6fdbd8SKent Overstreet goto out; 13001c6fdbd8SKent Overstreet 13011c6fdbd8SKent Overstreet /* If we're writing entire page, don't need to read it in first: */ 13021c6fdbd8SKent Overstreet if (len == PAGE_SIZE) 13031c6fdbd8SKent Overstreet goto out; 13041c6fdbd8SKent Overstreet 13051c6fdbd8SKent Overstreet if (!offset && pos + len >= inode->v.i_size) { 13061c6fdbd8SKent Overstreet zero_user_segment(page, len, PAGE_SIZE); 13071c6fdbd8SKent Overstreet flush_dcache_page(page); 13081c6fdbd8SKent Overstreet goto out; 13091c6fdbd8SKent Overstreet } 13101c6fdbd8SKent Overstreet 13111c6fdbd8SKent Overstreet if (index > inode->v.i_size >> PAGE_SHIFT) { 13121c6fdbd8SKent Overstreet zero_user_segments(page, 0, offset, offset + len, PAGE_SIZE); 13131c6fdbd8SKent Overstreet flush_dcache_page(page); 13141c6fdbd8SKent Overstreet goto out; 13151c6fdbd8SKent Overstreet } 13161c6fdbd8SKent Overstreet readpage: 13171c6fdbd8SKent Overstreet ret = bch2_read_single_page(page, mapping); 13181c6fdbd8SKent Overstreet if (ret) 13191c6fdbd8SKent Overstreet goto err; 13201c6fdbd8SKent Overstreet out: 1321d1542e03SKent Overstreet ret = bch2_page_reservation_get(c, inode, page, res, 1322d1542e03SKent Overstreet offset, len, true); 13231c6fdbd8SKent Overstreet if (ret) { 13241c6fdbd8SKent Overstreet if (!PageUptodate(page)) { 13251c6fdbd8SKent Overstreet /* 13261c6fdbd8SKent Overstreet * If the page hasn't been read in, we won't know if we 13271c6fdbd8SKent Overstreet * actually need a reservation - we don't actually need 13281c6fdbd8SKent Overstreet * to read here, we just need to check if the page is 13291c6fdbd8SKent Overstreet * fully backed by uncompressed data: 13301c6fdbd8SKent Overstreet */ 13311c6fdbd8SKent Overstreet goto readpage; 13321c6fdbd8SKent Overstreet } 13331c6fdbd8SKent Overstreet 13341c6fdbd8SKent Overstreet goto err; 13351c6fdbd8SKent Overstreet } 13361c6fdbd8SKent Overstreet 13371c6fdbd8SKent Overstreet *pagep = page; 13381c6fdbd8SKent Overstreet return 0; 13391c6fdbd8SKent Overstreet err: 13401c6fdbd8SKent Overstreet unlock_page(page); 13411c6fdbd8SKent Overstreet put_page(page); 13421c6fdbd8SKent Overstreet *pagep = NULL; 13431c6fdbd8SKent Overstreet err_unlock: 13441c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 1345d1542e03SKent Overstreet kfree(res); 1346d1542e03SKent Overstreet *fsdata = NULL; 13471c6fdbd8SKent Overstreet return ret; 13481c6fdbd8SKent Overstreet } 13491c6fdbd8SKent Overstreet 13501c6fdbd8SKent Overstreet int bch2_write_end(struct file *file, struct address_space *mapping, 13511c6fdbd8SKent Overstreet loff_t pos, unsigned len, unsigned copied, 13521c6fdbd8SKent Overstreet struct page *page, void *fsdata) 13531c6fdbd8SKent Overstreet { 13541c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(mapping->host); 13551c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 1356d1542e03SKent Overstreet struct bch2_page_reservation *res = fsdata; 1357d1542e03SKent Overstreet unsigned offset = pos & (PAGE_SIZE - 1); 13581c6fdbd8SKent Overstreet 13591c6fdbd8SKent Overstreet lockdep_assert_held(&inode->v.i_rwsem); 13601c6fdbd8SKent Overstreet 13611c6fdbd8SKent Overstreet if (unlikely(copied < len && !PageUptodate(page))) { 13621c6fdbd8SKent Overstreet /* 13631c6fdbd8SKent Overstreet * The page needs to be read in, but that would destroy 13641c6fdbd8SKent Overstreet * our partial write - simplest thing is to just force 13651c6fdbd8SKent Overstreet * userspace to redo the write: 13661c6fdbd8SKent Overstreet */ 13671c6fdbd8SKent Overstreet zero_user(page, 0, PAGE_SIZE); 13681c6fdbd8SKent Overstreet flush_dcache_page(page); 13691c6fdbd8SKent Overstreet copied = 0; 13701c6fdbd8SKent Overstreet } 13711c6fdbd8SKent Overstreet 13721c6fdbd8SKent Overstreet spin_lock(&inode->v.i_lock); 13731c6fdbd8SKent Overstreet if (pos + copied > inode->v.i_size) 13741c6fdbd8SKent Overstreet i_size_write(&inode->v, pos + copied); 13751c6fdbd8SKent Overstreet spin_unlock(&inode->v.i_lock); 13761c6fdbd8SKent Overstreet 13771c6fdbd8SKent Overstreet if (copied) { 13781c6fdbd8SKent Overstreet if (!PageUptodate(page)) 13791c6fdbd8SKent Overstreet SetPageUptodate(page); 1380d1542e03SKent Overstreet 1381d1542e03SKent Overstreet bch2_set_page_dirty(c, inode, page, res, offset, copied); 13821c6fdbd8SKent Overstreet 13831c6fdbd8SKent Overstreet inode->ei_last_dirtied = (unsigned long) current; 13841c6fdbd8SKent Overstreet } 13851c6fdbd8SKent Overstreet 13861c6fdbd8SKent Overstreet unlock_page(page); 13871c6fdbd8SKent Overstreet put_page(page); 13881c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 13891c6fdbd8SKent Overstreet 1390d1542e03SKent Overstreet bch2_page_reservation_put(c, inode, res); 1391d1542e03SKent Overstreet kfree(res); 1392d1542e03SKent Overstreet 13931c6fdbd8SKent Overstreet return copied; 13941c6fdbd8SKent Overstreet } 13951c6fdbd8SKent Overstreet 13961c6fdbd8SKent Overstreet #define WRITE_BATCH_PAGES 32 13971c6fdbd8SKent Overstreet 13981c6fdbd8SKent Overstreet static int __bch2_buffered_write(struct bch_inode_info *inode, 13991c6fdbd8SKent Overstreet struct address_space *mapping, 14001c6fdbd8SKent Overstreet struct iov_iter *iter, 14011c6fdbd8SKent Overstreet loff_t pos, unsigned len) 14021c6fdbd8SKent Overstreet { 14031c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 14041c6fdbd8SKent Overstreet struct page *pages[WRITE_BATCH_PAGES]; 1405d1542e03SKent Overstreet struct bch2_page_reservation res; 14061c6fdbd8SKent Overstreet unsigned long index = pos >> PAGE_SHIFT; 14071c6fdbd8SKent Overstreet unsigned offset = pos & (PAGE_SIZE - 1); 14081c6fdbd8SKent Overstreet unsigned nr_pages = DIV_ROUND_UP(offset + len, PAGE_SIZE); 1409d1542e03SKent Overstreet unsigned i, reserved = 0, set_dirty = 0; 1410d1542e03SKent Overstreet unsigned copied = 0, nr_pages_copied = 0; 14111c6fdbd8SKent Overstreet int ret = 0; 14121c6fdbd8SKent Overstreet 14131c6fdbd8SKent Overstreet BUG_ON(!len); 14141c6fdbd8SKent Overstreet BUG_ON(nr_pages > ARRAY_SIZE(pages)); 14151c6fdbd8SKent Overstreet 1416d1542e03SKent Overstreet bch2_page_reservation_init(c, inode, &res); 1417d1542e03SKent Overstreet 14181c6fdbd8SKent Overstreet for (i = 0; i < nr_pages; i++) { 14191c6fdbd8SKent Overstreet pages[i] = grab_cache_page_write_begin(mapping, index + i); 14201c6fdbd8SKent Overstreet if (!pages[i]) { 14211c6fdbd8SKent Overstreet nr_pages = i; 14228de819f8SKent Overstreet if (!i) { 14231c6fdbd8SKent Overstreet ret = -ENOMEM; 14241c6fdbd8SKent Overstreet goto out; 14251c6fdbd8SKent Overstreet } 14268de819f8SKent Overstreet len = min_t(unsigned, len, 14278de819f8SKent Overstreet nr_pages * PAGE_SIZE - offset); 14288de819f8SKent Overstreet break; 14298de819f8SKent Overstreet } 14301c6fdbd8SKent Overstreet } 14311c6fdbd8SKent Overstreet 14321c6fdbd8SKent Overstreet if (offset && !PageUptodate(pages[0])) { 14331c6fdbd8SKent Overstreet ret = bch2_read_single_page(pages[0], mapping); 14341c6fdbd8SKent Overstreet if (ret) 14351c6fdbd8SKent Overstreet goto out; 14361c6fdbd8SKent Overstreet } 14371c6fdbd8SKent Overstreet 14381c6fdbd8SKent Overstreet if ((pos + len) & (PAGE_SIZE - 1) && 14391c6fdbd8SKent Overstreet !PageUptodate(pages[nr_pages - 1])) { 14401c6fdbd8SKent Overstreet if ((index + nr_pages - 1) << PAGE_SHIFT >= inode->v.i_size) { 14411c6fdbd8SKent Overstreet zero_user(pages[nr_pages - 1], 0, PAGE_SIZE); 14421c6fdbd8SKent Overstreet } else { 14431c6fdbd8SKent Overstreet ret = bch2_read_single_page(pages[nr_pages - 1], mapping); 14441c6fdbd8SKent Overstreet if (ret) 14451c6fdbd8SKent Overstreet goto out; 14461c6fdbd8SKent Overstreet } 14471c6fdbd8SKent Overstreet } 14481c6fdbd8SKent Overstreet 1449d1542e03SKent Overstreet while (reserved < len) { 1450d1542e03SKent Overstreet struct page *page = pages[(offset + reserved) >> PAGE_SHIFT]; 1451d1542e03SKent Overstreet unsigned pg_offset = (offset + reserved) & (PAGE_SIZE - 1); 1452d1542e03SKent Overstreet unsigned pg_len = min_t(unsigned, len - reserved, 1453d1542e03SKent Overstreet PAGE_SIZE - pg_offset); 1454d1542e03SKent Overstreet retry_reservation: 1455d1542e03SKent Overstreet ret = bch2_page_reservation_get(c, inode, page, &res, 1456d1542e03SKent Overstreet pg_offset, pg_len, true); 14571c6fdbd8SKent Overstreet 1458d1542e03SKent Overstreet if (ret && !PageUptodate(page)) { 1459d1542e03SKent Overstreet ret = bch2_read_single_page(page, mapping); 1460d1542e03SKent Overstreet if (!ret) 1461d1542e03SKent Overstreet goto retry_reservation; 14621c6fdbd8SKent Overstreet } 14631c6fdbd8SKent Overstreet 14641c6fdbd8SKent Overstreet if (ret) 14651c6fdbd8SKent Overstreet goto out; 1466d1542e03SKent Overstreet 1467d1542e03SKent Overstreet reserved += pg_len; 14681c6fdbd8SKent Overstreet } 14691c6fdbd8SKent Overstreet 14701c6fdbd8SKent Overstreet if (mapping_writably_mapped(mapping)) 14711c6fdbd8SKent Overstreet for (i = 0; i < nr_pages; i++) 14721c6fdbd8SKent Overstreet flush_dcache_page(pages[i]); 14731c6fdbd8SKent Overstreet 14741c6fdbd8SKent Overstreet while (copied < len) { 14751c6fdbd8SKent Overstreet struct page *page = pages[(offset + copied) >> PAGE_SHIFT]; 14761c6fdbd8SKent Overstreet unsigned pg_offset = (offset + copied) & (PAGE_SIZE - 1); 1477d1542e03SKent Overstreet unsigned pg_len = min_t(unsigned, len - copied, 14781c6fdbd8SKent Overstreet PAGE_SIZE - pg_offset); 14791c6fdbd8SKent Overstreet unsigned pg_copied = copy_page_from_iter_atomic(page, 1480d1542e03SKent Overstreet pg_offset, pg_len, iter); 1481d1542e03SKent Overstreet 1482d1542e03SKent Overstreet if (!pg_copied) 1483d1542e03SKent Overstreet break; 14841c6fdbd8SKent Overstreet 1485912bdf17SKent Overstreet if (!PageUptodate(page) && 1486912bdf17SKent Overstreet pg_copied != PAGE_SIZE && 1487912bdf17SKent Overstreet pos + copied + pg_copied < inode->v.i_size) { 1488912bdf17SKent Overstreet zero_user(page, 0, PAGE_SIZE); 1489912bdf17SKent Overstreet break; 1490912bdf17SKent Overstreet } 1491912bdf17SKent Overstreet 14921c6fdbd8SKent Overstreet flush_dcache_page(page); 14931c6fdbd8SKent Overstreet copied += pg_copied; 1494912bdf17SKent Overstreet 1495912bdf17SKent Overstreet if (pg_copied != pg_len) 1496912bdf17SKent Overstreet break; 14971c6fdbd8SKent Overstreet } 14981c6fdbd8SKent Overstreet 14991c6fdbd8SKent Overstreet if (!copied) 15001c6fdbd8SKent Overstreet goto out; 15011c6fdbd8SKent Overstreet 1502877dfb34SKent Overstreet spin_lock(&inode->v.i_lock); 1503877dfb34SKent Overstreet if (pos + copied > inode->v.i_size) 1504877dfb34SKent Overstreet i_size_write(&inode->v, pos + copied); 1505877dfb34SKent Overstreet spin_unlock(&inode->v.i_lock); 1506877dfb34SKent Overstreet 1507d1542e03SKent Overstreet while (set_dirty < copied) { 1508d1542e03SKent Overstreet struct page *page = pages[(offset + set_dirty) >> PAGE_SHIFT]; 1509d1542e03SKent Overstreet unsigned pg_offset = (offset + set_dirty) & (PAGE_SIZE - 1); 1510d1542e03SKent Overstreet unsigned pg_len = min_t(unsigned, copied - set_dirty, 1511d1542e03SKent Overstreet PAGE_SIZE - pg_offset); 1512d1542e03SKent Overstreet 1513d1542e03SKent Overstreet if (!PageUptodate(page)) 1514d1542e03SKent Overstreet SetPageUptodate(page); 1515d1542e03SKent Overstreet 1516d1542e03SKent Overstreet bch2_set_page_dirty(c, inode, page, &res, pg_offset, pg_len); 1517d1542e03SKent Overstreet unlock_page(page); 1518d1542e03SKent Overstreet put_page(page); 1519d1542e03SKent Overstreet 1520d1542e03SKent Overstreet set_dirty += pg_len; 1521d1542e03SKent Overstreet } 1522877dfb34SKent Overstreet 1523877dfb34SKent Overstreet nr_pages_copied = DIV_ROUND_UP(offset + copied, PAGE_SIZE); 1524877dfb34SKent Overstreet inode->ei_last_dirtied = (unsigned long) current; 15251c6fdbd8SKent Overstreet out: 1526d1542e03SKent Overstreet for (i = nr_pages_copied; i < nr_pages; i++) { 15271c6fdbd8SKent Overstreet unlock_page(pages[i]); 15281c6fdbd8SKent Overstreet put_page(pages[i]); 15291c6fdbd8SKent Overstreet } 15301c6fdbd8SKent Overstreet 1531d1542e03SKent Overstreet bch2_page_reservation_put(c, inode, &res); 15321c6fdbd8SKent Overstreet 15331c6fdbd8SKent Overstreet return copied ?: ret; 15341c6fdbd8SKent Overstreet } 15351c6fdbd8SKent Overstreet 15361c6fdbd8SKent Overstreet static ssize_t bch2_buffered_write(struct kiocb *iocb, struct iov_iter *iter) 15371c6fdbd8SKent Overstreet { 15381c6fdbd8SKent Overstreet struct file *file = iocb->ki_filp; 15391c6fdbd8SKent Overstreet struct address_space *mapping = file->f_mapping; 15401c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 15411c6fdbd8SKent Overstreet loff_t pos = iocb->ki_pos; 15421c6fdbd8SKent Overstreet ssize_t written = 0; 15431c6fdbd8SKent Overstreet int ret = 0; 15441c6fdbd8SKent Overstreet 15451c6fdbd8SKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 15461c6fdbd8SKent Overstreet 15471c6fdbd8SKent Overstreet do { 15481c6fdbd8SKent Overstreet unsigned offset = pos & (PAGE_SIZE - 1); 15491c6fdbd8SKent Overstreet unsigned bytes = min_t(unsigned long, iov_iter_count(iter), 15501c6fdbd8SKent Overstreet PAGE_SIZE * WRITE_BATCH_PAGES - offset); 15511c6fdbd8SKent Overstreet again: 15521c6fdbd8SKent Overstreet /* 15531c6fdbd8SKent Overstreet * Bring in the user page that we will copy from _first_. 15541c6fdbd8SKent Overstreet * Otherwise there's a nasty deadlock on copying from the 15551c6fdbd8SKent Overstreet * same page as we're writing to, without it being marked 15561c6fdbd8SKent Overstreet * up-to-date. 15571c6fdbd8SKent Overstreet * 15581c6fdbd8SKent Overstreet * Not only is this an optimisation, but it is also required 15591c6fdbd8SKent Overstreet * to check that the address is actually valid, when atomic 15601c6fdbd8SKent Overstreet * usercopies are used, below. 15611c6fdbd8SKent Overstreet */ 15621c6fdbd8SKent Overstreet if (unlikely(fault_in_iov_iter_readable(iter, bytes))) { 15631c6fdbd8SKent Overstreet bytes = min_t(unsigned long, iov_iter_count(iter), 15641c6fdbd8SKent Overstreet PAGE_SIZE - offset); 15651c6fdbd8SKent Overstreet 15661c6fdbd8SKent Overstreet if (unlikely(fault_in_iov_iter_readable(iter, bytes))) { 15671c6fdbd8SKent Overstreet ret = -EFAULT; 15681c6fdbd8SKent Overstreet break; 15691c6fdbd8SKent Overstreet } 15701c6fdbd8SKent Overstreet } 15711c6fdbd8SKent Overstreet 15721c6fdbd8SKent Overstreet if (unlikely(fatal_signal_pending(current))) { 15731c6fdbd8SKent Overstreet ret = -EINTR; 15741c6fdbd8SKent Overstreet break; 15751c6fdbd8SKent Overstreet } 15761c6fdbd8SKent Overstreet 15771c6fdbd8SKent Overstreet ret = __bch2_buffered_write(inode, mapping, iter, pos, bytes); 15781c6fdbd8SKent Overstreet if (unlikely(ret < 0)) 15791c6fdbd8SKent Overstreet break; 15801c6fdbd8SKent Overstreet 15811c6fdbd8SKent Overstreet cond_resched(); 15821c6fdbd8SKent Overstreet 15831c6fdbd8SKent Overstreet if (unlikely(ret == 0)) { 15841c6fdbd8SKent Overstreet /* 15851c6fdbd8SKent Overstreet * If we were unable to copy any data at all, we must 15861c6fdbd8SKent Overstreet * fall back to a single segment length write. 15871c6fdbd8SKent Overstreet * 15881c6fdbd8SKent Overstreet * If we didn't fallback here, we could livelock 15891c6fdbd8SKent Overstreet * because not all segments in the iov can be copied at 15901c6fdbd8SKent Overstreet * once without a pagefault. 15911c6fdbd8SKent Overstreet */ 15921c6fdbd8SKent Overstreet bytes = min_t(unsigned long, PAGE_SIZE - offset, 15931c6fdbd8SKent Overstreet iov_iter_single_seg_count(iter)); 15941c6fdbd8SKent Overstreet goto again; 15951c6fdbd8SKent Overstreet } 15961c6fdbd8SKent Overstreet pos += ret; 15971c6fdbd8SKent Overstreet written += ret; 1598912bdf17SKent Overstreet ret = 0; 15991c6fdbd8SKent Overstreet 16001c6fdbd8SKent Overstreet balance_dirty_pages_ratelimited(mapping); 16011c6fdbd8SKent Overstreet } while (iov_iter_count(iter)); 16021c6fdbd8SKent Overstreet 16031c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 16041c6fdbd8SKent Overstreet 16051c6fdbd8SKent Overstreet return written ? written : ret; 16061c6fdbd8SKent Overstreet } 16071c6fdbd8SKent Overstreet 16081c6fdbd8SKent Overstreet /* O_DIRECT reads */ 16091c6fdbd8SKent Overstreet 1610b4725cc1SKent Overstreet static void bio_check_or_release(struct bio *bio, bool check_dirty) 1611b4725cc1SKent Overstreet { 1612b4725cc1SKent Overstreet if (check_dirty) { 1613b4725cc1SKent Overstreet bio_check_pages_dirty(bio); 1614b4725cc1SKent Overstreet } else { 1615b4725cc1SKent Overstreet bio_release_pages(bio, false); 1616b4725cc1SKent Overstreet bio_put(bio); 1617b4725cc1SKent Overstreet } 1618b4725cc1SKent Overstreet } 1619b4725cc1SKent Overstreet 16201c6fdbd8SKent Overstreet static void bch2_dio_read_complete(struct closure *cl) 16211c6fdbd8SKent Overstreet { 16221c6fdbd8SKent Overstreet struct dio_read *dio = container_of(cl, struct dio_read, cl); 16231c6fdbd8SKent Overstreet 16241c6fdbd8SKent Overstreet dio->req->ki_complete(dio->req, dio->ret); 1625b4725cc1SKent Overstreet bio_check_or_release(&dio->rbio.bio, dio->should_dirty); 16261c6fdbd8SKent Overstreet } 16271c6fdbd8SKent Overstreet 16281c6fdbd8SKent Overstreet static void bch2_direct_IO_read_endio(struct bio *bio) 16291c6fdbd8SKent Overstreet { 16301c6fdbd8SKent Overstreet struct dio_read *dio = bio->bi_private; 16311c6fdbd8SKent Overstreet 16321c6fdbd8SKent Overstreet if (bio->bi_status) 16331c6fdbd8SKent Overstreet dio->ret = blk_status_to_errno(bio->bi_status); 16341c6fdbd8SKent Overstreet 16351c6fdbd8SKent Overstreet closure_put(&dio->cl); 16361c6fdbd8SKent Overstreet } 16371c6fdbd8SKent Overstreet 16381c6fdbd8SKent Overstreet static void bch2_direct_IO_read_split_endio(struct bio *bio) 16391c6fdbd8SKent Overstreet { 1640b4725cc1SKent Overstreet struct dio_read *dio = bio->bi_private; 1641b4725cc1SKent Overstreet bool should_dirty = dio->should_dirty; 1642b4725cc1SKent Overstreet 16431c6fdbd8SKent Overstreet bch2_direct_IO_read_endio(bio); 1644b4725cc1SKent Overstreet bio_check_or_release(bio, should_dirty); 16451c6fdbd8SKent Overstreet } 16461c6fdbd8SKent Overstreet 16471c6fdbd8SKent Overstreet static int bch2_direct_IO_read(struct kiocb *req, struct iov_iter *iter) 16481c6fdbd8SKent Overstreet { 16491c6fdbd8SKent Overstreet struct file *file = req->ki_filp; 16501c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 16511c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 16529a3df993SKent Overstreet struct bch_io_opts opts = io_opts(c, &inode->ei_inode); 16531c6fdbd8SKent Overstreet struct dio_read *dio; 16541c6fdbd8SKent Overstreet struct bio *bio; 16551c6fdbd8SKent Overstreet loff_t offset = req->ki_pos; 16561c6fdbd8SKent Overstreet bool sync = is_sync_kiocb(req); 16571c6fdbd8SKent Overstreet size_t shorten; 16581c6fdbd8SKent Overstreet ssize_t ret; 16591c6fdbd8SKent Overstreet 16601c6fdbd8SKent Overstreet if ((offset|iter->count) & (block_bytes(c) - 1)) 16611c6fdbd8SKent Overstreet return -EINVAL; 16621c6fdbd8SKent Overstreet 16631c6fdbd8SKent Overstreet ret = min_t(loff_t, iter->count, 16641c6fdbd8SKent Overstreet max_t(loff_t, 0, i_size_read(&inode->v) - offset)); 16651c6fdbd8SKent Overstreet 16661c6fdbd8SKent Overstreet if (!ret) 16671c6fdbd8SKent Overstreet return ret; 16681c6fdbd8SKent Overstreet 16691c6fdbd8SKent Overstreet shorten = iov_iter_count(iter) - round_up(ret, block_bytes(c)); 16701c6fdbd8SKent Overstreet iter->count -= shorten; 16711c6fdbd8SKent Overstreet 16721c6fdbd8SKent Overstreet bio = bio_alloc_bioset(NULL, 16731c6fdbd8SKent Overstreet iov_iter_npages(iter, BIO_MAX_VECS), 16741c6fdbd8SKent Overstreet REQ_OP_READ, 16751c6fdbd8SKent Overstreet GFP_KERNEL, 16761c6fdbd8SKent Overstreet &c->dio_read_bioset); 16771c6fdbd8SKent Overstreet 16781c6fdbd8SKent Overstreet bio->bi_end_io = bch2_direct_IO_read_endio; 16791c6fdbd8SKent Overstreet 16801c6fdbd8SKent Overstreet dio = container_of(bio, struct dio_read, rbio.bio); 16811c6fdbd8SKent Overstreet closure_init(&dio->cl, NULL); 16821c6fdbd8SKent Overstreet 16831c6fdbd8SKent Overstreet /* 16841c6fdbd8SKent Overstreet * this is a _really_ horrible hack just to avoid an atomic sub at the 16851c6fdbd8SKent Overstreet * end: 16861c6fdbd8SKent Overstreet */ 16871c6fdbd8SKent Overstreet if (!sync) { 16881c6fdbd8SKent Overstreet set_closure_fn(&dio->cl, bch2_dio_read_complete, NULL); 16891c6fdbd8SKent Overstreet atomic_set(&dio->cl.remaining, 16901c6fdbd8SKent Overstreet CLOSURE_REMAINING_INITIALIZER - 16911c6fdbd8SKent Overstreet CLOSURE_RUNNING + 16921c6fdbd8SKent Overstreet CLOSURE_DESTRUCTOR); 16931c6fdbd8SKent Overstreet } else { 16941c6fdbd8SKent Overstreet atomic_set(&dio->cl.remaining, 16951c6fdbd8SKent Overstreet CLOSURE_REMAINING_INITIALIZER + 1); 16961c6fdbd8SKent Overstreet } 16971c6fdbd8SKent Overstreet 16981c6fdbd8SKent Overstreet dio->req = req; 16991c6fdbd8SKent Overstreet dio->ret = ret; 1700b4725cc1SKent Overstreet /* 1701b4725cc1SKent Overstreet * This is one of the sketchier things I've encountered: we have to skip 1702b4725cc1SKent Overstreet * the dirtying of requests that are internal from the kernel (i.e. from 1703b4725cc1SKent Overstreet * loopback), because we'll deadlock on page_lock. 1704b4725cc1SKent Overstreet */ 1705b4725cc1SKent Overstreet dio->should_dirty = iter_is_iovec(iter); 17061c6fdbd8SKent Overstreet 17071c6fdbd8SKent Overstreet goto start; 17081c6fdbd8SKent Overstreet while (iter->count) { 17091c6fdbd8SKent Overstreet bio = bio_alloc_bioset(NULL, 17101c6fdbd8SKent Overstreet iov_iter_npages(iter, BIO_MAX_VECS), 17111c6fdbd8SKent Overstreet REQ_OP_READ, 17121c6fdbd8SKent Overstreet GFP_KERNEL, 17131c6fdbd8SKent Overstreet &c->bio_read); 17141c6fdbd8SKent Overstreet bio->bi_end_io = bch2_direct_IO_read_split_endio; 17151c6fdbd8SKent Overstreet start: 17161c6fdbd8SKent Overstreet bio->bi_opf = REQ_OP_READ|REQ_SYNC; 17171c6fdbd8SKent Overstreet bio->bi_iter.bi_sector = offset >> 9; 17181c6fdbd8SKent Overstreet bio->bi_private = dio; 17191c6fdbd8SKent Overstreet 17201c6fdbd8SKent Overstreet ret = bio_iov_iter_get_pages(bio, iter); 17211c6fdbd8SKent Overstreet if (ret < 0) { 17221c6fdbd8SKent Overstreet /* XXX: fault inject this path */ 17231c6fdbd8SKent Overstreet bio->bi_status = BLK_STS_RESOURCE; 17241c6fdbd8SKent Overstreet bio_endio(bio); 17251c6fdbd8SKent Overstreet break; 17261c6fdbd8SKent Overstreet } 17271c6fdbd8SKent Overstreet 17281c6fdbd8SKent Overstreet offset += bio->bi_iter.bi_size; 1729b4725cc1SKent Overstreet 1730b4725cc1SKent Overstreet if (dio->should_dirty) 17311c6fdbd8SKent Overstreet bio_set_pages_dirty(bio); 17321c6fdbd8SKent Overstreet 17331c6fdbd8SKent Overstreet if (iter->count) 17341c6fdbd8SKent Overstreet closure_get(&dio->cl); 17351c6fdbd8SKent Overstreet 17361c6fdbd8SKent Overstreet bch2_read(c, rbio_init(bio, opts), inode->v.i_ino); 17371c6fdbd8SKent Overstreet } 17381c6fdbd8SKent Overstreet 17391c6fdbd8SKent Overstreet iter->count += shorten; 17401c6fdbd8SKent Overstreet 17411c6fdbd8SKent Overstreet if (sync) { 17421c6fdbd8SKent Overstreet closure_sync(&dio->cl); 17431c6fdbd8SKent Overstreet closure_debug_destroy(&dio->cl); 17441c6fdbd8SKent Overstreet ret = dio->ret; 1745b4725cc1SKent Overstreet bio_check_or_release(&dio->rbio.bio, dio->should_dirty); 17461c6fdbd8SKent Overstreet return ret; 17471c6fdbd8SKent Overstreet } else { 17481c6fdbd8SKent Overstreet return -EIOCBQUEUED; 17491c6fdbd8SKent Overstreet } 17501c6fdbd8SKent Overstreet } 17511c6fdbd8SKent Overstreet 17521c6fdbd8SKent Overstreet ssize_t bch2_read_iter(struct kiocb *iocb, struct iov_iter *iter) 17531c6fdbd8SKent Overstreet { 17541c6fdbd8SKent Overstreet struct file *file = iocb->ki_filp; 17551c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 17561c6fdbd8SKent Overstreet struct address_space *mapping = file->f_mapping; 17571c6fdbd8SKent Overstreet size_t count = iov_iter_count(iter); 17581c6fdbd8SKent Overstreet ssize_t ret; 17591c6fdbd8SKent Overstreet 17601c6fdbd8SKent Overstreet if (!count) 17611c6fdbd8SKent Overstreet return 0; /* skip atime */ 17621c6fdbd8SKent Overstreet 17631c6fdbd8SKent Overstreet if (iocb->ki_flags & IOCB_DIRECT) { 17641c6fdbd8SKent Overstreet struct blk_plug plug; 17651c6fdbd8SKent Overstreet 1766a023127aSKent Overstreet if (unlikely(mapping->nrpages)) { 17671c6fdbd8SKent Overstreet ret = filemap_write_and_wait_range(mapping, 17681c6fdbd8SKent Overstreet iocb->ki_pos, 17691c6fdbd8SKent Overstreet iocb->ki_pos + count - 1); 17701c6fdbd8SKent Overstreet if (ret < 0) 17711c6fdbd8SKent Overstreet return ret; 1772a023127aSKent Overstreet } 17731c6fdbd8SKent Overstreet 17741c6fdbd8SKent Overstreet file_accessed(file); 17751c6fdbd8SKent Overstreet 17761c6fdbd8SKent Overstreet blk_start_plug(&plug); 17771c6fdbd8SKent Overstreet ret = bch2_direct_IO_read(iocb, iter); 17781c6fdbd8SKent Overstreet blk_finish_plug(&plug); 17791c6fdbd8SKent Overstreet 17801c6fdbd8SKent Overstreet if (ret >= 0) 17811c6fdbd8SKent Overstreet iocb->ki_pos += ret; 17821c6fdbd8SKent Overstreet } else { 17831c6fdbd8SKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 17841c6fdbd8SKent Overstreet ret = generic_file_read_iter(iocb, iter); 17851c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 17861c6fdbd8SKent Overstreet } 17871c6fdbd8SKent Overstreet 17881c6fdbd8SKent Overstreet return ret; 17891c6fdbd8SKent Overstreet } 17901c6fdbd8SKent Overstreet 17911c6fdbd8SKent Overstreet /* O_DIRECT writes */ 17921c6fdbd8SKent Overstreet 17931c6fdbd8SKent Overstreet /* 17941c6fdbd8SKent Overstreet * We're going to return -EIOCBQUEUED, but we haven't finished consuming the 17951c6fdbd8SKent Overstreet * iov_iter yet, so we need to stash a copy of the iovec: it might be on the 17961c6fdbd8SKent Overstreet * caller's stack, we're not guaranteed that it will live for the duration of 17971c6fdbd8SKent Overstreet * the IO: 17981c6fdbd8SKent Overstreet */ 17991c6fdbd8SKent Overstreet static noinline int bch2_dio_write_copy_iov(struct dio_write *dio) 18001c6fdbd8SKent Overstreet { 18011c6fdbd8SKent Overstreet struct iovec *iov = dio->inline_vecs; 18021c6fdbd8SKent Overstreet 18031c6fdbd8SKent Overstreet /* 18041c6fdbd8SKent Overstreet * iov_iter has a single embedded iovec - nothing to do: 18051c6fdbd8SKent Overstreet */ 18061c6fdbd8SKent Overstreet if (iter_is_ubuf(&dio->iter)) 18071c6fdbd8SKent Overstreet return 0; 18081c6fdbd8SKent Overstreet 18091c6fdbd8SKent Overstreet /* 18101c6fdbd8SKent Overstreet * We don't currently handle non-iovec iov_iters here - return an error, 18111c6fdbd8SKent Overstreet * and we'll fall back to doing the IO synchronously: 18121c6fdbd8SKent Overstreet */ 18131c6fdbd8SKent Overstreet if (!iter_is_iovec(&dio->iter)) 18141c6fdbd8SKent Overstreet return -1; 18151c6fdbd8SKent Overstreet 18161c6fdbd8SKent Overstreet if (dio->iter.nr_segs > ARRAY_SIZE(dio->inline_vecs)) { 18171c6fdbd8SKent Overstreet iov = kmalloc_array(dio->iter.nr_segs, sizeof(*iov), 18181c6fdbd8SKent Overstreet GFP_KERNEL); 18191c6fdbd8SKent Overstreet if (unlikely(!iov)) 18201c6fdbd8SKent Overstreet return -ENOMEM; 18211c6fdbd8SKent Overstreet 18221c6fdbd8SKent Overstreet dio->free_iov = true; 18231c6fdbd8SKent Overstreet } 18241c6fdbd8SKent Overstreet 18251c6fdbd8SKent Overstreet memcpy(iov, dio->iter.__iov, dio->iter.nr_segs * sizeof(*iov)); 18261c6fdbd8SKent Overstreet dio->iter.__iov = iov; 18271c6fdbd8SKent Overstreet return 0; 18281c6fdbd8SKent Overstreet } 18291c6fdbd8SKent Overstreet 1830042a1f26SKent Overstreet static void bch2_dio_write_loop_async(struct bch_write_op *); 1831042a1f26SKent Overstreet 18321c6fdbd8SKent Overstreet static long bch2_dio_write_loop(struct dio_write *dio) 18331c6fdbd8SKent Overstreet { 1834ed484030SKent Overstreet bool kthread = (current->flags & PF_KTHREAD) != 0; 18351c6fdbd8SKent Overstreet struct kiocb *req = dio->req; 18361c6fdbd8SKent Overstreet struct address_space *mapping = req->ki_filp->f_mapping; 18379a3df993SKent Overstreet struct bch_inode_info *inode = file_bch_inode(req->ki_filp); 1838042a1f26SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 18399a3df993SKent Overstreet struct bio *bio = &dio->op.wbio.bio; 1840eb8e6e9cSKent Overstreet unsigned unaligned, iter_count; 1841eb8e6e9cSKent Overstreet bool sync = dio->sync, dropped_locks; 18421c6fdbd8SKent Overstreet long ret; 18431c6fdbd8SKent Overstreet 18441c6fdbd8SKent Overstreet if (dio->loop) 18451c6fdbd8SKent Overstreet goto loop; 18461c6fdbd8SKent Overstreet 18471c6fdbd8SKent Overstreet while (1) { 1848eb8e6e9cSKent Overstreet iter_count = dio->iter.count; 1849eb8e6e9cSKent Overstreet 1850ed484030SKent Overstreet if (kthread) 1851ed484030SKent Overstreet kthread_use_mm(dio->mm); 18521c6fdbd8SKent Overstreet BUG_ON(current->faults_disabled_mapping); 18531c6fdbd8SKent Overstreet current->faults_disabled_mapping = mapping; 18541c6fdbd8SKent Overstreet 18551c6fdbd8SKent Overstreet ret = bio_iov_iter_get_pages(bio, &dio->iter); 18561c6fdbd8SKent Overstreet 1857eb8e6e9cSKent Overstreet dropped_locks = fdm_dropped_locks(); 1858eb8e6e9cSKent Overstreet 18591c6fdbd8SKent Overstreet current->faults_disabled_mapping = NULL; 1860ed484030SKent Overstreet if (kthread) 1861ed484030SKent Overstreet kthread_unuse_mm(dio->mm); 18621c6fdbd8SKent Overstreet 1863eb8e6e9cSKent Overstreet /* 1864eb8e6e9cSKent Overstreet * If the fault handler returned an error but also signalled 1865eb8e6e9cSKent Overstreet * that it dropped & retook ei_pagecache_lock, we just need to 1866eb8e6e9cSKent Overstreet * re-shoot down the page cache and retry: 1867eb8e6e9cSKent Overstreet */ 1868eb8e6e9cSKent Overstreet if (dropped_locks && ret) 1869eb8e6e9cSKent Overstreet ret = 0; 1870eb8e6e9cSKent Overstreet 18711c6fdbd8SKent Overstreet if (unlikely(ret < 0)) 18721c6fdbd8SKent Overstreet goto err; 18731c6fdbd8SKent Overstreet 1874eb8e6e9cSKent Overstreet if (unlikely(dropped_locks)) { 1875eb8e6e9cSKent Overstreet ret = write_invalidate_inode_pages_range(mapping, 1876eb8e6e9cSKent Overstreet req->ki_pos, 1877eb8e6e9cSKent Overstreet req->ki_pos + iter_count - 1); 1878eb8e6e9cSKent Overstreet if (unlikely(ret)) 1879eb8e6e9cSKent Overstreet goto err; 1880eb8e6e9cSKent Overstreet 1881eb8e6e9cSKent Overstreet if (!bio->bi_iter.bi_size) 1882eb8e6e9cSKent Overstreet continue; 1883eb8e6e9cSKent Overstreet } 1884eb8e6e9cSKent Overstreet 18850a426c32SKent Overstreet unaligned = bio->bi_iter.bi_size & (block_bytes(c) - 1); 18860a426c32SKent Overstreet bio->bi_iter.bi_size -= unaligned; 18870a426c32SKent Overstreet iov_iter_revert(&dio->iter, unaligned); 18880a426c32SKent Overstreet 18890a426c32SKent Overstreet if (!bio->bi_iter.bi_size) { 18900a426c32SKent Overstreet /* 18910a426c32SKent Overstreet * bio_iov_iter_get_pages was only able to get < 18920a426c32SKent Overstreet * blocksize worth of pages: 18930a426c32SKent Overstreet */ 18940a426c32SKent Overstreet ret = -EFAULT; 18950a426c32SKent Overstreet goto err; 18960a426c32SKent Overstreet } 18970a426c32SKent Overstreet 1898042a1f26SKent Overstreet bch2_write_op_init(&dio->op, c, io_opts(c, &inode->ei_inode)); 1899042a1f26SKent Overstreet dio->op.end_io = bch2_dio_write_loop_async; 1900042a1f26SKent Overstreet dio->op.target = dio->op.opts.foreground_target; 1901042a1f26SKent Overstreet op_journal_seq_set(&dio->op, &inode->ei_journal_seq); 1902042a1f26SKent Overstreet dio->op.write_point = writepoint_hashed((unsigned long) current); 1903042a1f26SKent Overstreet dio->op.nr_replicas = dio->op.opts.data_replicas; 1904042a1f26SKent Overstreet dio->op.pos = POS(inode->v.i_ino, (u64) req->ki_pos >> 9); 1905042a1f26SKent Overstreet 1906042a1f26SKent Overstreet if ((req->ki_flags & IOCB_DSYNC) && 1907042a1f26SKent Overstreet !c->opts.journal_flush_disabled) 1908042a1f26SKent Overstreet dio->op.flags |= BCH_WRITE_FLUSH; 1909a6336910SKent Overstreet dio->op.flags |= BCH_WRITE_CHECK_ENOSPC; 1910042a1f26SKent Overstreet 1911042a1f26SKent Overstreet ret = bch2_disk_reservation_get(c, &dio->op.res, bio_sectors(bio), 1912042a1f26SKent Overstreet dio->op.opts.data_replicas, 0); 1913042a1f26SKent Overstreet if (unlikely(ret) && 1914042a1f26SKent Overstreet !bch2_check_range_allocated(c, dio->op.pos, 191535a067b4SKent Overstreet bio_sectors(bio), 191635a067b4SKent Overstreet dio->op.opts.data_replicas, 191735a067b4SKent Overstreet dio->op.opts.compression != 0)) 1918042a1f26SKent Overstreet goto err; 19191c6fdbd8SKent Overstreet 19201c6fdbd8SKent Overstreet task_io_account_write(bio->bi_iter.bi_size); 19211c6fdbd8SKent Overstreet 19221c6fdbd8SKent Overstreet if (!dio->sync && !dio->loop && dio->iter.count) { 19231c6fdbd8SKent Overstreet if (bch2_dio_write_copy_iov(dio)) { 1924286d8ad0SKent Overstreet dio->sync = sync = true; 1925f8f30863SKent Overstreet goto do_io; 19261c6fdbd8SKent Overstreet } 19271c6fdbd8SKent Overstreet } 1928f8f30863SKent Overstreet do_io: 19291c6fdbd8SKent Overstreet dio->loop = true; 1930f8f30863SKent Overstreet closure_call(&dio->op.cl, bch2_write, NULL, NULL); 19311c6fdbd8SKent Overstreet 1932286d8ad0SKent Overstreet if (sync) 1933f8f30863SKent Overstreet wait_for_completion(&dio->done); 1934f8f30863SKent Overstreet else 19351c6fdbd8SKent Overstreet return -EIOCBQUEUED; 19361c6fdbd8SKent Overstreet loop: 19379a3df993SKent Overstreet i_sectors_acct(c, inode, &dio->quota_res, 19389a3df993SKent Overstreet dio->op.i_sectors_delta); 1939042a1f26SKent Overstreet req->ki_pos += (u64) dio->op.written << 9; 1940042a1f26SKent Overstreet dio->written += dio->op.written; 19419a3df993SKent Overstreet 19429a3df993SKent Overstreet spin_lock(&inode->v.i_lock); 1943042a1f26SKent Overstreet if (req->ki_pos > inode->v.i_size) 1944042a1f26SKent Overstreet i_size_write(&inode->v, req->ki_pos); 19459a3df993SKent Overstreet spin_unlock(&inode->v.i_lock); 19469a3df993SKent Overstreet 1947032ac32cSKent Overstreet bio_release_pages(bio, false); 19485468f119SKent Overstreet bio->bi_vcnt = 0; 194933c74e41SKent Overstreet 195033c74e41SKent Overstreet if (dio->op.error) { 195133c74e41SKent Overstreet set_bit(EI_INODE_ERROR, &inode->ei_flags); 195233c74e41SKent Overstreet break; 195333c74e41SKent Overstreet } 195433c74e41SKent Overstreet 195533c74e41SKent Overstreet if (!dio->iter.count) 19561c6fdbd8SKent Overstreet break; 1957f8f30863SKent Overstreet 19581c6fdbd8SKent Overstreet bio_reset(bio, NULL, REQ_OP_WRITE); 1959f8f30863SKent Overstreet reinit_completion(&dio->done); 19601c6fdbd8SKent Overstreet } 19611c6fdbd8SKent Overstreet 1962042a1f26SKent Overstreet ret = dio->op.error ?: ((long) dio->written << 9); 19631c6fdbd8SKent Overstreet err: 19641c6fdbd8SKent Overstreet bch2_pagecache_block_put(&inode->ei_pagecache_lock); 19650a426c32SKent Overstreet bch2_quota_reservation_put(c, inode, &dio->quota_res); 19661c6fdbd8SKent Overstreet 19671c6fdbd8SKent Overstreet if (dio->free_iov) 19681c6fdbd8SKent Overstreet kfree(dio->iter.__iov); 19691c6fdbd8SKent Overstreet 19705468f119SKent Overstreet bio_release_pages(bio, false); 19711c6fdbd8SKent Overstreet bio_put(bio); 19721c6fdbd8SKent Overstreet 19731c6fdbd8SKent Overstreet /* inode->i_dio_count is our ref on inode and thus bch_fs */ 19741c6fdbd8SKent Overstreet inode_dio_end(&inode->v); 19751c6fdbd8SKent Overstreet 19761c6fdbd8SKent Overstreet if (!sync) { 19771c6fdbd8SKent Overstreet req->ki_complete(req, ret); 19781c6fdbd8SKent Overstreet ret = -EIOCBQUEUED; 19791c6fdbd8SKent Overstreet } 19801c6fdbd8SKent Overstreet return ret; 19811c6fdbd8SKent Overstreet } 19821c6fdbd8SKent Overstreet 1983f8f30863SKent Overstreet static void bch2_dio_write_loop_async(struct bch_write_op *op) 19841c6fdbd8SKent Overstreet { 1985f8f30863SKent Overstreet struct dio_write *dio = container_of(op, struct dio_write, op); 19861c6fdbd8SKent Overstreet 1987f8f30863SKent Overstreet if (dio->sync) 1988f8f30863SKent Overstreet complete(&dio->done); 1989f8f30863SKent Overstreet else 19901c6fdbd8SKent Overstreet bch2_dio_write_loop(dio); 19911c6fdbd8SKent Overstreet } 19921c6fdbd8SKent Overstreet 19931c6fdbd8SKent Overstreet static noinline 19941c6fdbd8SKent Overstreet ssize_t bch2_direct_write(struct kiocb *req, struct iov_iter *iter) 19951c6fdbd8SKent Overstreet { 19961c6fdbd8SKent Overstreet struct file *file = req->ki_filp; 199754847d25SKent Overstreet struct address_space *mapping = file->f_mapping; 19981c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 19991c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 20001c6fdbd8SKent Overstreet struct dio_write *dio; 20011c6fdbd8SKent Overstreet struct bio *bio; 20027edcfbfeSKent Overstreet bool locked = true, extending; 20031c6fdbd8SKent Overstreet ssize_t ret; 20041c6fdbd8SKent Overstreet 20057edcfbfeSKent Overstreet prefetch(&c->opts); 20067edcfbfeSKent Overstreet prefetch((void *) &c->opts + 64); 20077edcfbfeSKent Overstreet prefetch(&inode->ei_inode); 20087edcfbfeSKent Overstreet prefetch((void *) &inode->ei_inode + 64); 20091c6fdbd8SKent Overstreet 20107edcfbfeSKent Overstreet inode_lock(&inode->v); 20117edcfbfeSKent Overstreet 20127edcfbfeSKent Overstreet ret = generic_write_checks(req, iter); 20137edcfbfeSKent Overstreet if (unlikely(ret <= 0)) 20147edcfbfeSKent Overstreet goto err; 20157edcfbfeSKent Overstreet 20167edcfbfeSKent Overstreet ret = file_remove_privs(file); 20177edcfbfeSKent Overstreet if (unlikely(ret)) 20187edcfbfeSKent Overstreet goto err; 20197edcfbfeSKent Overstreet 20207edcfbfeSKent Overstreet ret = file_update_time(file); 20217edcfbfeSKent Overstreet if (unlikely(ret)) 20227edcfbfeSKent Overstreet goto err; 20231c6fdbd8SKent Overstreet 2024919dbbd1SKent Overstreet if (unlikely((req->ki_pos|iter->count) & (block_bytes(c) - 1))) 20257edcfbfeSKent Overstreet goto err; 20267edcfbfeSKent Overstreet 20277edcfbfeSKent Overstreet inode_dio_begin(&inode->v); 20287edcfbfeSKent Overstreet bch2_pagecache_block_get(&inode->ei_pagecache_lock); 20297edcfbfeSKent Overstreet 20307edcfbfeSKent Overstreet extending = req->ki_pos + iter->count > inode->v.i_size; 20317edcfbfeSKent Overstreet if (!extending) { 20327edcfbfeSKent Overstreet inode_unlock(&inode->v); 20337edcfbfeSKent Overstreet locked = false; 20347edcfbfeSKent Overstreet } 20351c6fdbd8SKent Overstreet 20361c6fdbd8SKent Overstreet bio = bio_alloc_bioset(NULL, 20372ed5cd50SKent Overstreet iov_iter_is_bvec(iter) 20382ed5cd50SKent Overstreet ? 0 20392ed5cd50SKent Overstreet : iov_iter_npages(iter, BIO_MAX_VECS), 20401c6fdbd8SKent Overstreet REQ_OP_WRITE, 20411c6fdbd8SKent Overstreet GFP_KERNEL, 20421c6fdbd8SKent Overstreet &c->dio_write_bioset); 20439a3df993SKent Overstreet dio = container_of(bio, struct dio_write, op.wbio.bio); 2044f8f30863SKent Overstreet init_completion(&dio->done); 20451c6fdbd8SKent Overstreet dio->req = req; 2046ed484030SKent Overstreet dio->mm = current->mm; 20471c6fdbd8SKent Overstreet dio->loop = false; 20487edcfbfeSKent Overstreet dio->sync = is_sync_kiocb(req) || extending; 20491c6fdbd8SKent Overstreet dio->free_iov = false; 20501c6fdbd8SKent Overstreet dio->quota_res.sectors = 0; 2051042a1f26SKent Overstreet dio->written = 0; 20521c6fdbd8SKent Overstreet dio->iter = *iter; 20539a3df993SKent Overstreet 20541c6fdbd8SKent Overstreet ret = bch2_quota_reservation_add(c, inode, &dio->quota_res, 20551c6fdbd8SKent Overstreet iter->count >> 9, true); 20561c6fdbd8SKent Overstreet if (unlikely(ret)) 20577edcfbfeSKent Overstreet goto err_put_bio; 20581c6fdbd8SKent Overstreet 2059a023127aSKent Overstreet if (unlikely(mapping->nrpages)) { 206054847d25SKent Overstreet ret = write_invalidate_inode_pages_range(mapping, 206154847d25SKent Overstreet req->ki_pos, 206254847d25SKent Overstreet req->ki_pos + iter->count - 1); 206354847d25SKent Overstreet if (unlikely(ret)) 206454847d25SKent Overstreet goto err_put_bio; 2065a023127aSKent Overstreet } 206654847d25SKent Overstreet 20677edcfbfeSKent Overstreet ret = bch2_dio_write_loop(dio); 20681c6fdbd8SKent Overstreet err: 20697edcfbfeSKent Overstreet if (locked) 20707edcfbfeSKent Overstreet inode_unlock(&inode->v); 20717edcfbfeSKent Overstreet return ret; 20727edcfbfeSKent Overstreet err_put_bio: 20737edcfbfeSKent Overstreet bch2_pagecache_block_put(&inode->ei_pagecache_lock); 20741c6fdbd8SKent Overstreet bch2_quota_reservation_put(c, inode, &dio->quota_res); 20751c6fdbd8SKent Overstreet bio_put(bio); 20767edcfbfeSKent Overstreet inode_dio_end(&inode->v); 20777edcfbfeSKent Overstreet goto err; 20781c6fdbd8SKent Overstreet } 20791c6fdbd8SKent Overstreet 20807edcfbfeSKent Overstreet ssize_t bch2_write_iter(struct kiocb *iocb, struct iov_iter *from) 20811c6fdbd8SKent Overstreet { 20821c6fdbd8SKent Overstreet struct file *file = iocb->ki_filp; 20837edcfbfeSKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 20841c6fdbd8SKent Overstreet ssize_t ret; 20851c6fdbd8SKent Overstreet 20861c6fdbd8SKent Overstreet if (iocb->ki_flags & IOCB_DIRECT) 20871c6fdbd8SKent Overstreet return bch2_direct_write(iocb, from); 20881c6fdbd8SKent Overstreet 20897edcfbfeSKent Overstreet inode_lock(&inode->v); 20907edcfbfeSKent Overstreet 20917edcfbfeSKent Overstreet ret = generic_write_checks(iocb, from); 20927edcfbfeSKent Overstreet if (ret <= 0) 20937edcfbfeSKent Overstreet goto unlock; 20947edcfbfeSKent Overstreet 20951c6fdbd8SKent Overstreet ret = file_remove_privs(file); 20961c6fdbd8SKent Overstreet if (ret) 20977edcfbfeSKent Overstreet goto unlock; 20981c6fdbd8SKent Overstreet 20991c6fdbd8SKent Overstreet ret = file_update_time(file); 21001c6fdbd8SKent Overstreet if (ret) 21017edcfbfeSKent Overstreet goto unlock; 21021c6fdbd8SKent Overstreet 21037edcfbfeSKent Overstreet ret = bch2_buffered_write(iocb, from); 21041c6fdbd8SKent Overstreet if (likely(ret > 0)) 21051c6fdbd8SKent Overstreet iocb->ki_pos += ret; 21067edcfbfeSKent Overstreet unlock: 21071c6fdbd8SKent Overstreet inode_unlock(&inode->v); 21081c6fdbd8SKent Overstreet 21097edcfbfeSKent Overstreet if (ret > 0) 21101c6fdbd8SKent Overstreet ret = generic_write_sync(iocb, ret); 21111c6fdbd8SKent Overstreet 21121c6fdbd8SKent Overstreet return ret; 21131c6fdbd8SKent Overstreet } 21141c6fdbd8SKent Overstreet 21151c6fdbd8SKent Overstreet /* fsync: */ 21161c6fdbd8SKent Overstreet 21171c6fdbd8SKent Overstreet int bch2_fsync(struct file *file, loff_t start, loff_t end, int datasync) 21181c6fdbd8SKent Overstreet { 21191c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 21201c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 2121bb1b3658SKent Overstreet int ret, ret2; 21221c6fdbd8SKent Overstreet 21231c6fdbd8SKent Overstreet ret = file_write_and_wait_range(file, start, end); 21241c6fdbd8SKent Overstreet if (ret) 21251c6fdbd8SKent Overstreet return ret; 21261c6fdbd8SKent Overstreet 21271c6fdbd8SKent Overstreet if (datasync && !(inode->v.i_state & I_DIRTY_DATASYNC)) 21281c6fdbd8SKent Overstreet goto out; 21291c6fdbd8SKent Overstreet 21301c6fdbd8SKent Overstreet ret = sync_inode_metadata(&inode->v, 1); 21311c6fdbd8SKent Overstreet if (ret) 21321c6fdbd8SKent Overstreet return ret; 21331c6fdbd8SKent Overstreet out: 213475812e70SKent Overstreet if (!c->opts.journal_flush_disabled) 213575812e70SKent Overstreet ret = bch2_journal_flush_seq(&c->journal, 213675812e70SKent Overstreet inode->ei_journal_seq); 2137bb1b3658SKent Overstreet ret2 = file_check_and_advance_wb_err(file); 2138bb1b3658SKent Overstreet 2139bb1b3658SKent Overstreet return ret ?: ret2; 21401c6fdbd8SKent Overstreet } 21411c6fdbd8SKent Overstreet 21421c6fdbd8SKent Overstreet /* truncate: */ 21431c6fdbd8SKent Overstreet 21441c6fdbd8SKent Overstreet static inline int range_has_data(struct bch_fs *c, 21451c6fdbd8SKent Overstreet struct bpos start, 21461c6fdbd8SKent Overstreet struct bpos end) 21471c6fdbd8SKent Overstreet { 2148424eb881SKent Overstreet struct btree_trans trans; 2149*67e0dd8fSKent Overstreet struct btree_iter iter; 21501c6fdbd8SKent Overstreet struct bkey_s_c k; 21511c6fdbd8SKent Overstreet int ret = 0; 21521c6fdbd8SKent Overstreet 215320bceecbSKent Overstreet bch2_trans_init(&trans, c, 0, 0); 2154424eb881SKent Overstreet 215541f8b09eSKent Overstreet for_each_btree_key(&trans, iter, BTREE_ID_extents, start, 0, k, ret) { 21561c6fdbd8SKent Overstreet if (bkey_cmp(bkey_start_pos(k.k), end) >= 0) 21571c6fdbd8SKent Overstreet break; 21581c6fdbd8SKent Overstreet 21591c6fdbd8SKent Overstreet if (bkey_extent_is_data(k.k)) { 21601c6fdbd8SKent Overstreet ret = 1; 21611c6fdbd8SKent Overstreet break; 21621c6fdbd8SKent Overstreet } 21631c6fdbd8SKent Overstreet } 2164*67e0dd8fSKent Overstreet bch2_trans_iter_exit(&trans, &iter); 21651c6fdbd8SKent Overstreet 2166424eb881SKent Overstreet return bch2_trans_exit(&trans) ?: ret; 21671c6fdbd8SKent Overstreet } 21681c6fdbd8SKent Overstreet 21691c6fdbd8SKent Overstreet static int __bch2_truncate_page(struct bch_inode_info *inode, 21701c6fdbd8SKent Overstreet pgoff_t index, loff_t start, loff_t end) 21711c6fdbd8SKent Overstreet { 21721c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 21731c6fdbd8SKent Overstreet struct address_space *mapping = inode->v.i_mapping; 2174a99b1cafSKent Overstreet struct bch_page_state *s; 21751c6fdbd8SKent Overstreet unsigned start_offset = start & (PAGE_SIZE - 1); 21761c6fdbd8SKent Overstreet unsigned end_offset = ((end - 1) & (PAGE_SIZE - 1)) + 1; 2177a99b1cafSKent Overstreet unsigned i; 21781c6fdbd8SKent Overstreet struct page *page; 21791c6fdbd8SKent Overstreet int ret = 0; 21801c6fdbd8SKent Overstreet 21811c6fdbd8SKent Overstreet /* Page boundary? Nothing to do */ 21821c6fdbd8SKent Overstreet if (!((index == start >> PAGE_SHIFT && start_offset) || 21831c6fdbd8SKent Overstreet (index == end >> PAGE_SHIFT && end_offset != PAGE_SIZE))) 21841c6fdbd8SKent Overstreet return 0; 21851c6fdbd8SKent Overstreet 21861c6fdbd8SKent Overstreet /* Above i_size? */ 21871c6fdbd8SKent Overstreet if (index << PAGE_SHIFT >= inode->v.i_size) 21881c6fdbd8SKent Overstreet return 0; 21891c6fdbd8SKent Overstreet 21901c6fdbd8SKent Overstreet page = find_lock_page(mapping, index); 21911c6fdbd8SKent Overstreet if (!page) { 21921c6fdbd8SKent Overstreet /* 21931c6fdbd8SKent Overstreet * XXX: we're doing two index lookups when we end up reading the 21941c6fdbd8SKent Overstreet * page 21951c6fdbd8SKent Overstreet */ 21961c6fdbd8SKent Overstreet ret = range_has_data(c, 21971c6fdbd8SKent Overstreet POS(inode->v.i_ino, index << PAGE_SECTOR_SHIFT), 21981c6fdbd8SKent Overstreet POS(inode->v.i_ino, (index + 1) << PAGE_SECTOR_SHIFT)); 21991c6fdbd8SKent Overstreet if (ret <= 0) 22001c6fdbd8SKent Overstreet return ret; 22011c6fdbd8SKent Overstreet 22021c6fdbd8SKent Overstreet page = find_or_create_page(mapping, index, GFP_KERNEL); 22031c6fdbd8SKent Overstreet if (unlikely(!page)) { 22041c6fdbd8SKent Overstreet ret = -ENOMEM; 22051c6fdbd8SKent Overstreet goto out; 22061c6fdbd8SKent Overstreet } 22071c6fdbd8SKent Overstreet } 22081c6fdbd8SKent Overstreet 2209a99b1cafSKent Overstreet s = bch2_page_state_create(page, 0); 2210a99b1cafSKent Overstreet if (!s) { 2211a99b1cafSKent Overstreet ret = -ENOMEM; 2212a99b1cafSKent Overstreet goto unlock; 2213a99b1cafSKent Overstreet } 2214a99b1cafSKent Overstreet 22151c6fdbd8SKent Overstreet if (!PageUptodate(page)) { 22161c6fdbd8SKent Overstreet ret = bch2_read_single_page(page, mapping); 22171c6fdbd8SKent Overstreet if (ret) 22181c6fdbd8SKent Overstreet goto unlock; 22191c6fdbd8SKent Overstreet } 22201c6fdbd8SKent Overstreet 2221a99b1cafSKent Overstreet if (index != start >> PAGE_SHIFT) 2222a99b1cafSKent Overstreet start_offset = 0; 2223a99b1cafSKent Overstreet if (index != end >> PAGE_SHIFT) 2224a99b1cafSKent Overstreet end_offset = PAGE_SIZE; 2225a99b1cafSKent Overstreet 2226a99b1cafSKent Overstreet for (i = round_up(start_offset, block_bytes(c)) >> 9; 2227a99b1cafSKent Overstreet i < round_down(end_offset, block_bytes(c)) >> 9; 2228a99b1cafSKent Overstreet i++) { 2229a99b1cafSKent Overstreet s->s[i].nr_replicas = 0; 2230a99b1cafSKent Overstreet s->s[i].state = SECTOR_UNALLOCATED; 2231a99b1cafSKent Overstreet } 2232a99b1cafSKent Overstreet 2233a99b1cafSKent Overstreet zero_user_segment(page, start_offset, end_offset); 2234a99b1cafSKent Overstreet 22351c6fdbd8SKent Overstreet /* 22361c6fdbd8SKent Overstreet * Bit of a hack - we don't want truncate to fail due to -ENOSPC. 22371c6fdbd8SKent Overstreet * 22381c6fdbd8SKent Overstreet * XXX: because we aren't currently tracking whether the page has actual 22391c6fdbd8SKent Overstreet * data in it (vs. just 0s, or only partially written) this wrong. ick. 22401c6fdbd8SKent Overstreet */ 2241d1542e03SKent Overstreet ret = bch2_get_page_disk_reservation(c, inode, page, false); 22421c6fdbd8SKent Overstreet BUG_ON(ret); 22431c6fdbd8SKent Overstreet 22449ba2eb25SKent Overstreet /* 22459ba2eb25SKent Overstreet * This removes any writeable userspace mappings; we need to force 22469ba2eb25SKent Overstreet * .page_mkwrite to be called again before any mmapped writes, to 22479ba2eb25SKent Overstreet * redirty the full page: 22489ba2eb25SKent Overstreet */ 22499ba2eb25SKent Overstreet page_mkclean(page); 2250d1542e03SKent Overstreet filemap_dirty_folio(mapping, page_folio(page)); 22511c6fdbd8SKent Overstreet unlock: 22521c6fdbd8SKent Overstreet unlock_page(page); 22531c6fdbd8SKent Overstreet put_page(page); 22541c6fdbd8SKent Overstreet out: 22551c6fdbd8SKent Overstreet return ret; 22561c6fdbd8SKent Overstreet } 22571c6fdbd8SKent Overstreet 22581c6fdbd8SKent Overstreet static int bch2_truncate_page(struct bch_inode_info *inode, loff_t from) 22591c6fdbd8SKent Overstreet { 22601c6fdbd8SKent Overstreet return __bch2_truncate_page(inode, from >> PAGE_SHIFT, 2261a99b1cafSKent Overstreet from, round_up(from, PAGE_SIZE)); 22621c6fdbd8SKent Overstreet } 22631c6fdbd8SKent Overstreet 226468a507a2SKent Overstreet static int bch2_extend(struct mnt_idmap *idmap, 226568a507a2SKent Overstreet struct bch_inode_info *inode, 2266e0541a93SKent Overstreet struct bch_inode_unpacked *inode_u, 2267e0541a93SKent Overstreet struct iattr *iattr) 22681c6fdbd8SKent Overstreet { 22691c6fdbd8SKent Overstreet struct address_space *mapping = inode->v.i_mapping; 22701c6fdbd8SKent Overstreet int ret; 22711c6fdbd8SKent Overstreet 2272e0541a93SKent Overstreet /* 2273e0541a93SKent Overstreet * sync appends: 22742925fc49SKent Overstreet * 22752925fc49SKent Overstreet * this has to be done _before_ extending i_size: 2276e0541a93SKent Overstreet */ 2277e0541a93SKent Overstreet ret = filemap_write_and_wait_range(mapping, inode_u->bi_size, S64_MAX); 22781c6fdbd8SKent Overstreet if (ret) 22791c6fdbd8SKent Overstreet return ret; 22801c6fdbd8SKent Overstreet 22811c6fdbd8SKent Overstreet truncate_setsize(&inode->v, iattr->ia_size); 22821c6fdbd8SKent Overstreet 228368a507a2SKent Overstreet return bch2_setattr_nonsize(idmap, inode, iattr); 22841c6fdbd8SKent Overstreet } 22851c6fdbd8SKent Overstreet 228654e2264eSKent Overstreet static int bch2_truncate_finish_fn(struct bch_inode_info *inode, 228754e2264eSKent Overstreet struct bch_inode_unpacked *bi, 228854e2264eSKent Overstreet void *p) 228954e2264eSKent Overstreet { 229054e2264eSKent Overstreet bi->bi_flags &= ~BCH_INODE_I_SIZE_DIRTY; 229154e2264eSKent Overstreet return 0; 229254e2264eSKent Overstreet } 229354e2264eSKent Overstreet 229454e2264eSKent Overstreet static int bch2_truncate_start_fn(struct bch_inode_info *inode, 229554e2264eSKent Overstreet struct bch_inode_unpacked *bi, void *p) 229654e2264eSKent Overstreet { 229754e2264eSKent Overstreet u64 *new_i_size = p; 229854e2264eSKent Overstreet 229954e2264eSKent Overstreet bi->bi_flags |= BCH_INODE_I_SIZE_DIRTY; 230054e2264eSKent Overstreet bi->bi_size = *new_i_size; 230154e2264eSKent Overstreet return 0; 230254e2264eSKent Overstreet } 230354e2264eSKent Overstreet 230468a507a2SKent Overstreet int bch2_truncate(struct mnt_idmap *idmap, 230568a507a2SKent Overstreet struct bch_inode_info *inode, struct iattr *iattr) 23061c6fdbd8SKent Overstreet { 23071c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 23081c6fdbd8SKent Overstreet struct address_space *mapping = inode->v.i_mapping; 2309e0541a93SKent Overstreet struct bch_inode_unpacked inode_u; 231054e2264eSKent Overstreet u64 new_i_size = iattr->ia_size; 23112e87eae1SKent Overstreet s64 i_sectors_delta = 0; 23121c6fdbd8SKent Overstreet int ret = 0; 23131c6fdbd8SKent Overstreet 231468a507a2SKent Overstreet /* 231578d66ab1SDan Robertson * If the truncate call with change the size of the file, the 231678d66ab1SDan Robertson * cmtimes should be updated. If the size will not change, we 231778d66ab1SDan Robertson * do not need to update the cmtimes. 231868a507a2SKent Overstreet */ 231978d66ab1SDan Robertson if (iattr->ia_size != inode->v.i_size) { 232068a507a2SKent Overstreet if (!(iattr->ia_valid & ATTR_MTIME)) 232168a507a2SKent Overstreet ktime_get_coarse_real_ts64(&iattr->ia_mtime); 232268a507a2SKent Overstreet if (!(iattr->ia_valid & ATTR_CTIME)) 232368a507a2SKent Overstreet ktime_get_coarse_real_ts64(&iattr->ia_ctime); 232468a507a2SKent Overstreet iattr->ia_valid |= ATTR_MTIME|ATTR_CTIME; 232578d66ab1SDan Robertson } 232668a507a2SKent Overstreet 23271c6fdbd8SKent Overstreet inode_dio_wait(&inode->v); 23281c6fdbd8SKent Overstreet bch2_pagecache_block_get(&inode->ei_pagecache_lock); 23291c6fdbd8SKent Overstreet 2330b97bbd4eSKent Overstreet ret = bch2_inode_find_by_inum(c, inode->v.i_ino, &inode_u); 2331e0541a93SKent Overstreet if (ret) 2332e0541a93SKent Overstreet goto err; 23331c6fdbd8SKent Overstreet 2334c45d473dSKent Overstreet /* 2335c45d473dSKent Overstreet * check this before next assertion; on filesystem error our normal 2336c45d473dSKent Overstreet * invariants are a bit broken (truncate has to truncate the page cache 2337c45d473dSKent Overstreet * before the inode). 2338c45d473dSKent Overstreet */ 2339c45d473dSKent Overstreet ret = bch2_journal_error(&c->journal); 2340c45d473dSKent Overstreet if (ret) 2341c45d473dSKent Overstreet goto err; 2342c45d473dSKent Overstreet 234333c74e41SKent Overstreet WARN_ON(!test_bit(EI_INODE_ERROR, &inode->ei_flags) && 234433c74e41SKent Overstreet inode->v.i_size < inode_u.bi_size); 2345e0541a93SKent Overstreet 2346e0541a93SKent Overstreet if (iattr->ia_size > inode->v.i_size) { 234768a507a2SKent Overstreet ret = bch2_extend(idmap, inode, &inode_u, iattr); 234854e2264eSKent Overstreet goto err; 23491c6fdbd8SKent Overstreet } 23501c6fdbd8SKent Overstreet 235168a507a2SKent Overstreet iattr->ia_valid &= ~ATTR_SIZE; 235268a507a2SKent Overstreet 23531c6fdbd8SKent Overstreet ret = bch2_truncate_page(inode, iattr->ia_size); 23541c6fdbd8SKent Overstreet if (unlikely(ret)) 235554e2264eSKent Overstreet goto err; 23561c6fdbd8SKent Overstreet 23576cc3535dSKent Overstreet /* 23586cc3535dSKent Overstreet * When extending, we're going to write the new i_size to disk 23596cc3535dSKent Overstreet * immediately so we need to flush anything above the current on disk 23606cc3535dSKent Overstreet * i_size first: 23616cc3535dSKent Overstreet * 23626cc3535dSKent Overstreet * Also, when extending we need to flush the page that i_size currently 23636cc3535dSKent Overstreet * straddles - if it's mapped to userspace, we need to ensure that 23646cc3535dSKent Overstreet * userspace has to redirty it and call .mkwrite -> set_page_dirty 23656cc3535dSKent Overstreet * again to allocate the part of the page that was extended. 23666cc3535dSKent Overstreet */ 2367e0541a93SKent Overstreet if (iattr->ia_size > inode_u.bi_size) 23681c6fdbd8SKent Overstreet ret = filemap_write_and_wait_range(mapping, 2369e0541a93SKent Overstreet inode_u.bi_size, 23701c6fdbd8SKent Overstreet iattr->ia_size - 1); 23711c6fdbd8SKent Overstreet else if (iattr->ia_size & (PAGE_SIZE - 1)) 23721c6fdbd8SKent Overstreet ret = filemap_write_and_wait_range(mapping, 23731c6fdbd8SKent Overstreet round_down(iattr->ia_size, PAGE_SIZE), 23741c6fdbd8SKent Overstreet iattr->ia_size - 1); 23751c6fdbd8SKent Overstreet if (ret) 237654e2264eSKent Overstreet goto err; 23771c6fdbd8SKent Overstreet 237854e2264eSKent Overstreet mutex_lock(&inode->ei_update_lock); 237954e2264eSKent Overstreet ret = bch2_write_inode(c, inode, bch2_truncate_start_fn, 238054e2264eSKent Overstreet &new_i_size, 0); 238154e2264eSKent Overstreet mutex_unlock(&inode->ei_update_lock); 23821c6fdbd8SKent Overstreet 23831c6fdbd8SKent Overstreet if (unlikely(ret)) 238454e2264eSKent Overstreet goto err; 23851c6fdbd8SKent Overstreet 23861c6fdbd8SKent Overstreet truncate_setsize(&inode->v, iattr->ia_size); 23871c6fdbd8SKent Overstreet 23882e87eae1SKent Overstreet ret = bch2_fpunch(c, inode->v.i_ino, 2389a99b1cafSKent Overstreet round_up(iattr->ia_size, block_bytes(c)) >> 9, 23902e87eae1SKent Overstreet U64_MAX, &inode->ei_journal_seq, &i_sectors_delta); 23912e87eae1SKent Overstreet i_sectors_acct(c, inode, NULL, i_sectors_delta); 23922e87eae1SKent Overstreet 23931c6fdbd8SKent Overstreet if (unlikely(ret)) 239454e2264eSKent Overstreet goto err; 23951c6fdbd8SKent Overstreet 239654e2264eSKent Overstreet mutex_lock(&inode->ei_update_lock); 239768a507a2SKent Overstreet ret = bch2_write_inode(c, inode, bch2_truncate_finish_fn, NULL, 0); 239854e2264eSKent Overstreet mutex_unlock(&inode->ei_update_lock); 239968a507a2SKent Overstreet 240068a507a2SKent Overstreet ret = bch2_setattr_nonsize(idmap, inode, iattr); 240154e2264eSKent Overstreet err: 24021c6fdbd8SKent Overstreet bch2_pagecache_block_put(&inode->ei_pagecache_lock); 24031c6fdbd8SKent Overstreet return ret; 24041c6fdbd8SKent Overstreet } 24051c6fdbd8SKent Overstreet 24061c6fdbd8SKent Overstreet /* fallocate: */ 24071c6fdbd8SKent Overstreet 2408050197b1SKent Overstreet static int inode_update_times_fn(struct bch_inode_info *inode, 2409050197b1SKent Overstreet struct bch_inode_unpacked *bi, void *p) 2410050197b1SKent Overstreet { 2411050197b1SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 2412050197b1SKent Overstreet 2413050197b1SKent Overstreet bi->bi_mtime = bi->bi_ctime = bch2_current_time(c); 2414050197b1SKent Overstreet return 0; 2415050197b1SKent Overstreet } 2416050197b1SKent Overstreet 24172e87eae1SKent Overstreet static long bchfs_fpunch(struct bch_inode_info *inode, loff_t offset, loff_t len) 24181c6fdbd8SKent Overstreet { 24191c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 2420a99b1cafSKent Overstreet u64 discard_start = round_up(offset, block_bytes(c)) >> 9; 2421a99b1cafSKent Overstreet u64 discard_end = round_down(offset + len, block_bytes(c)) >> 9; 24221c6fdbd8SKent Overstreet int ret = 0; 24231c6fdbd8SKent Overstreet 24241c6fdbd8SKent Overstreet inode_lock(&inode->v); 24251c6fdbd8SKent Overstreet inode_dio_wait(&inode->v); 24261c6fdbd8SKent Overstreet bch2_pagecache_block_get(&inode->ei_pagecache_lock); 24271c6fdbd8SKent Overstreet 24281c6fdbd8SKent Overstreet ret = __bch2_truncate_page(inode, 24291c6fdbd8SKent Overstreet offset >> PAGE_SHIFT, 24301c6fdbd8SKent Overstreet offset, offset + len); 24311c6fdbd8SKent Overstreet if (unlikely(ret)) 24321c6fdbd8SKent Overstreet goto err; 24331c6fdbd8SKent Overstreet 24341c6fdbd8SKent Overstreet if (offset >> PAGE_SHIFT != 24351c6fdbd8SKent Overstreet (offset + len) >> PAGE_SHIFT) { 24361c6fdbd8SKent Overstreet ret = __bch2_truncate_page(inode, 24371c6fdbd8SKent Overstreet (offset + len) >> PAGE_SHIFT, 24381c6fdbd8SKent Overstreet offset, offset + len); 24391c6fdbd8SKent Overstreet if (unlikely(ret)) 24401c6fdbd8SKent Overstreet goto err; 24411c6fdbd8SKent Overstreet } 24421c6fdbd8SKent Overstreet 24431c6fdbd8SKent Overstreet truncate_pagecache_range(&inode->v, offset, offset + len - 1); 24441c6fdbd8SKent Overstreet 24452e87eae1SKent Overstreet if (discard_start < discard_end) { 24462e87eae1SKent Overstreet s64 i_sectors_delta = 0; 24472e87eae1SKent Overstreet 24482e87eae1SKent Overstreet ret = bch2_fpunch(c, inode->v.i_ino, 24492e87eae1SKent Overstreet discard_start, discard_end, 24502e87eae1SKent Overstreet &inode->ei_journal_seq, 24512e87eae1SKent Overstreet &i_sectors_delta); 24522e87eae1SKent Overstreet i_sectors_acct(c, inode, NULL, i_sectors_delta); 24532e87eae1SKent Overstreet } 2454050197b1SKent Overstreet 2455050197b1SKent Overstreet mutex_lock(&inode->ei_update_lock); 2456050197b1SKent Overstreet ret = bch2_write_inode(c, inode, inode_update_times_fn, NULL, 2457050197b1SKent Overstreet ATTR_MTIME|ATTR_CTIME) ?: ret; 2458050197b1SKent Overstreet mutex_unlock(&inode->ei_update_lock); 24591c6fdbd8SKent Overstreet err: 24601c6fdbd8SKent Overstreet bch2_pagecache_block_put(&inode->ei_pagecache_lock); 24611c6fdbd8SKent Overstreet inode_unlock(&inode->v); 24621c6fdbd8SKent Overstreet 24631c6fdbd8SKent Overstreet return ret; 24641c6fdbd8SKent Overstreet } 24651c6fdbd8SKent Overstreet 24662e87eae1SKent Overstreet static long bchfs_fcollapse_finsert(struct bch_inode_info *inode, 24675f786787SKent Overstreet loff_t offset, loff_t len, 24685f786787SKent Overstreet bool insert) 24691c6fdbd8SKent Overstreet { 24701c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 24711c6fdbd8SKent Overstreet struct address_space *mapping = inode->v.i_mapping; 247207a1006aSKent Overstreet struct bkey_buf copy; 2473d69f41d6SKent Overstreet struct btree_trans trans; 2474*67e0dd8fSKent Overstreet struct btree_iter src, dst, del; 24755f786787SKent Overstreet loff_t shift, new_size; 24765f786787SKent Overstreet u64 src_start; 247750dc0f69SKent Overstreet int ret = 0; 24781c6fdbd8SKent Overstreet 24791c6fdbd8SKent Overstreet if ((offset | len) & (block_bytes(c) - 1)) 24801c6fdbd8SKent Overstreet return -EINVAL; 24811c6fdbd8SKent Overstreet 24821c6fdbd8SKent Overstreet /* 24831c6fdbd8SKent Overstreet * We need i_mutex to keep the page cache consistent with the extents 24841c6fdbd8SKent Overstreet * btree, and the btree consistent with i_size - we don't need outside 24851c6fdbd8SKent Overstreet * locking for the extents btree itself, because we're using linked 24861c6fdbd8SKent Overstreet * iterators 24871c6fdbd8SKent Overstreet */ 24881c6fdbd8SKent Overstreet inode_lock(&inode->v); 24891c6fdbd8SKent Overstreet inode_dio_wait(&inode->v); 24901c6fdbd8SKent Overstreet bch2_pagecache_block_get(&inode->ei_pagecache_lock); 24911c6fdbd8SKent Overstreet 24925f786787SKent Overstreet if (insert) { 24935f786787SKent Overstreet ret = -EFBIG; 24945f786787SKent Overstreet if (inode->v.i_sb->s_maxbytes - inode->v.i_size < len) 24955f786787SKent Overstreet goto err; 24965f786787SKent Overstreet 24975f786787SKent Overstreet ret = -EINVAL; 24985f786787SKent Overstreet if (offset >= inode->v.i_size) 24995f786787SKent Overstreet goto err; 25005f786787SKent Overstreet 25015f786787SKent Overstreet src_start = U64_MAX; 25025f786787SKent Overstreet shift = len; 25035f786787SKent Overstreet } else { 25041c6fdbd8SKent Overstreet ret = -EINVAL; 25051c6fdbd8SKent Overstreet if (offset + len >= inode->v.i_size) 25061c6fdbd8SKent Overstreet goto err; 25071c6fdbd8SKent Overstreet 25085f786787SKent Overstreet src_start = offset + len; 25095f786787SKent Overstreet shift = -len; 25105f786787SKent Overstreet } 25111c6fdbd8SKent Overstreet 25125f786787SKent Overstreet new_size = inode->v.i_size + shift; 25131c6fdbd8SKent Overstreet 25141c6fdbd8SKent Overstreet ret = write_invalidate_inode_pages_range(mapping, offset, LLONG_MAX); 25151c6fdbd8SKent Overstreet if (ret) 25161c6fdbd8SKent Overstreet goto err; 25171c6fdbd8SKent Overstreet 25185f786787SKent Overstreet if (insert) { 25195f786787SKent Overstreet i_size_write(&inode->v, new_size); 25205f786787SKent Overstreet mutex_lock(&inode->ei_update_lock); 25215f786787SKent Overstreet ret = bch2_write_inode_size(c, inode, new_size, 25225f786787SKent Overstreet ATTR_MTIME|ATTR_CTIME); 25235f786787SKent Overstreet mutex_unlock(&inode->ei_update_lock); 25245f786787SKent Overstreet } else { 25252e87eae1SKent Overstreet s64 i_sectors_delta = 0; 25262e87eae1SKent Overstreet 25272e87eae1SKent Overstreet ret = bch2_fpunch(c, inode->v.i_ino, 25282e87eae1SKent Overstreet offset >> 9, (offset + len) >> 9, 25292e87eae1SKent Overstreet &inode->ei_journal_seq, 25302e87eae1SKent Overstreet &i_sectors_delta); 25312e87eae1SKent Overstreet i_sectors_acct(c, inode, NULL, i_sectors_delta); 25322e87eae1SKent Overstreet 253363095894SKent Overstreet if (ret) 253463095894SKent Overstreet goto err; 25355f786787SKent Overstreet } 25368ef231bdSKent Overstreet 253750dc0f69SKent Overstreet bch2_bkey_buf_init(©); 2538f7beb4caSKent Overstreet bch2_trans_init(&trans, c, BTREE_ITER_MAX, 1024); 2539*67e0dd8fSKent Overstreet bch2_trans_iter_init(&trans, &src, BTREE_ID_extents, 25405f786787SKent Overstreet POS(inode->v.i_ino, src_start >> 9), 254163095894SKent Overstreet BTREE_ITER_INTENT); 2542*67e0dd8fSKent Overstreet bch2_trans_copy_iter(&dst, &src); 2543*67e0dd8fSKent Overstreet bch2_trans_copy_iter(&del, &src); 25445f786787SKent Overstreet 254550dc0f69SKent Overstreet while (ret == 0 || ret == -EINTR) { 254663095894SKent Overstreet struct disk_reservation disk_res = 254763095894SKent Overstreet bch2_disk_reservation_init(c, 0); 254863095894SKent Overstreet struct bkey_i delete; 254963095894SKent Overstreet struct bkey_s_c k; 255063095894SKent Overstreet struct bpos next_pos; 25515f786787SKent Overstreet struct bpos move_pos = POS(inode->v.i_ino, offset >> 9); 25525f786787SKent Overstreet struct bpos atomic_end; 25532d594dfbSKent Overstreet unsigned trigger_flags = 0; 255463095894SKent Overstreet 2555700c25b3SKent Overstreet bch2_trans_begin(&trans); 2556700c25b3SKent Overstreet 25575f786787SKent Overstreet k = insert 2558*67e0dd8fSKent Overstreet ? bch2_btree_iter_peek_prev(&src) 2559*67e0dd8fSKent Overstreet : bch2_btree_iter_peek(&src); 256063095894SKent Overstreet if ((ret = bkey_err(k))) 256150dc0f69SKent Overstreet continue; 256263095894SKent Overstreet 256363095894SKent Overstreet if (!k.k || k.k->p.inode != inode->v.i_ino) 256463095894SKent Overstreet break; 256563095894SKent Overstreet 25665f786787SKent Overstreet if (insert && 25675f786787SKent Overstreet bkey_cmp(k.k->p, POS(inode->v.i_ino, offset >> 9)) <= 0) 25685f786787SKent Overstreet break; 25695f786787SKent Overstreet reassemble: 257007a1006aSKent Overstreet bch2_bkey_buf_reassemble(©, c, k); 25715f786787SKent Overstreet 25725f786787SKent Overstreet if (insert && 2573283eda57SKent Overstreet bkey_cmp(bkey_start_pos(k.k), move_pos) < 0) 257435189e09SKent Overstreet bch2_cut_front(move_pos, copy.k); 25755f786787SKent Overstreet 257635189e09SKent Overstreet copy.k->k.p.offset += shift >> 9; 2577*67e0dd8fSKent Overstreet bch2_btree_iter_set_pos(&dst, bkey_start_pos(©.k->k)); 25781c6fdbd8SKent Overstreet 2579*67e0dd8fSKent Overstreet ret = bch2_extent_atomic_end(&trans, &dst, copy.k, &atomic_end); 25803c7f3b7aSKent Overstreet if (ret) 258150dc0f69SKent Overstreet continue; 2582e2d9912cSKent Overstreet 258335189e09SKent Overstreet if (bkey_cmp(atomic_end, copy.k->k.p)) { 25845f786787SKent Overstreet if (insert) { 25855f786787SKent Overstreet move_pos = atomic_end; 25865f786787SKent Overstreet move_pos.offset -= shift >> 9; 25875f786787SKent Overstreet goto reassemble; 25885f786787SKent Overstreet } else { 2589085ab693SKent Overstreet bch2_cut_back(atomic_end, copy.k); 25905f786787SKent Overstreet } 25915f786787SKent Overstreet } 25925f786787SKent Overstreet 259363095894SKent Overstreet bkey_init(&delete.k); 2594283eda57SKent Overstreet delete.k.p = copy.k->k.p; 2595283eda57SKent Overstreet delete.k.size = copy.k->k.size; 2596283eda57SKent Overstreet delete.k.p.offset -= shift >> 9; 2597*67e0dd8fSKent Overstreet bch2_btree_iter_set_pos(&del, bkey_start_pos(&delete.k)); 25981c6fdbd8SKent Overstreet 25995f786787SKent Overstreet next_pos = insert ? bkey_start_pos(&delete.k) : delete.k.p; 260063095894SKent Overstreet 260135189e09SKent Overstreet if (copy.k->k.size == k.k->size) { 260263095894SKent Overstreet /* 260363095894SKent Overstreet * If we're moving the entire extent, we can skip 260463095894SKent Overstreet * running triggers: 260563095894SKent Overstreet */ 26062d594dfbSKent Overstreet trigger_flags |= BTREE_TRIGGER_NORUN; 260763095894SKent Overstreet } else { 260863095894SKent Overstreet /* We might end up splitting compressed extents: */ 260963095894SKent Overstreet unsigned nr_ptrs = 26104de77495SKent Overstreet bch2_bkey_nr_ptrs_allocated(bkey_i_to_s_c(copy.k)); 261163095894SKent Overstreet 261263095894SKent Overstreet ret = bch2_disk_reservation_get(c, &disk_res, 261335189e09SKent Overstreet copy.k->k.size, nr_ptrs, 26141c6fdbd8SKent Overstreet BCH_DISK_RESERVATION_NOFAIL); 26151c6fdbd8SKent Overstreet BUG_ON(ret); 261663095894SKent Overstreet } 26171c6fdbd8SKent Overstreet 2618*67e0dd8fSKent Overstreet ret = bch2_btree_iter_traverse(&del) ?: 2619*67e0dd8fSKent Overstreet bch2_trans_update(&trans, &del, &delete, trigger_flags) ?: 2620*67e0dd8fSKent Overstreet bch2_trans_update(&trans, &dst, copy.k, trigger_flags) ?: 262124326cd1SKent Overstreet bch2_trans_commit(&trans, &disk_res, 262263095894SKent Overstreet &inode->ei_journal_seq, 26232d594dfbSKent Overstreet BTREE_INSERT_NOFAIL); 26241c6fdbd8SKent Overstreet bch2_disk_reservation_put(c, &disk_res); 262550dc0f69SKent Overstreet 262663095894SKent Overstreet if (!ret) 2627*67e0dd8fSKent Overstreet bch2_btree_iter_set_pos(&src, next_pos); 262850dc0f69SKent Overstreet } 2629*67e0dd8fSKent Overstreet bch2_trans_iter_exit(&trans, &del); 2630*67e0dd8fSKent Overstreet bch2_trans_iter_exit(&trans, &dst); 2631*67e0dd8fSKent Overstreet bch2_trans_iter_exit(&trans, &src); 263250dc0f69SKent Overstreet bch2_trans_exit(&trans); 263350dc0f69SKent Overstreet bch2_bkey_buf_exit(©, c); 263463095894SKent Overstreet 26358ef231bdSKent Overstreet if (ret) 26368ef231bdSKent Overstreet goto err; 26371c6fdbd8SKent Overstreet 26385f786787SKent Overstreet if (!insert) { 26398ef231bdSKent Overstreet i_size_write(&inode->v, new_size); 26408ef231bdSKent Overstreet mutex_lock(&inode->ei_update_lock); 26418ef231bdSKent Overstreet ret = bch2_write_inode_size(c, inode, new_size, 26428ef231bdSKent Overstreet ATTR_MTIME|ATTR_CTIME); 26438ef231bdSKent Overstreet mutex_unlock(&inode->ei_update_lock); 26445f786787SKent Overstreet } 26451c6fdbd8SKent Overstreet err: 26461c6fdbd8SKent Overstreet bch2_pagecache_block_put(&inode->ei_pagecache_lock); 26471c6fdbd8SKent Overstreet inode_unlock(&inode->v); 26481c6fdbd8SKent Overstreet return ret; 26491c6fdbd8SKent Overstreet } 26501c6fdbd8SKent Overstreet 2651694015c2SKent Overstreet static int __bchfs_fallocate(struct bch_inode_info *inode, int mode, 2652694015c2SKent Overstreet u64 start_sector, u64 end_sector) 26531c6fdbd8SKent Overstreet { 26541c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 2655190fa7afSKent Overstreet struct btree_trans trans; 2656*67e0dd8fSKent Overstreet struct btree_iter iter; 2657694015c2SKent Overstreet struct bpos end_pos = POS(inode->v.i_ino, end_sector); 26589a3df993SKent Overstreet unsigned replicas = io_opts(c, &inode->ei_inode).data_replicas; 2659694015c2SKent Overstreet int ret = 0; 26601c6fdbd8SKent Overstreet 2661f7beb4caSKent Overstreet bch2_trans_init(&trans, c, BTREE_ITER_MAX, 512); 26621c6fdbd8SKent Overstreet 2663*67e0dd8fSKent Overstreet bch2_trans_iter_init(&trans, &iter, BTREE_ID_extents, 2664694015c2SKent Overstreet POS(inode->v.i_ino, start_sector), 2665190fa7afSKent Overstreet BTREE_ITER_SLOTS|BTREE_ITER_INTENT); 26661c6fdbd8SKent Overstreet 2667*67e0dd8fSKent Overstreet while (!ret && bkey_cmp(iter.pos, end_pos) < 0) { 26682e87eae1SKent Overstreet s64 i_sectors_delta = 0; 26691c6fdbd8SKent Overstreet struct disk_reservation disk_res = { 0 }; 2670190fa7afSKent Overstreet struct quota_res quota_res = { 0 }; 26711c6fdbd8SKent Overstreet struct bkey_i_reservation reservation; 26721c6fdbd8SKent Overstreet struct bkey_s_c k; 2673694015c2SKent Overstreet unsigned sectors; 26741c6fdbd8SKent Overstreet 2675163e885aSKent Overstreet bch2_trans_begin(&trans); 2676a8abd3a7SKent Overstreet 2677*67e0dd8fSKent Overstreet k = bch2_btree_iter_peek_slot(&iter); 26780f238367SKent Overstreet if ((ret = bkey_err(k))) 26790f238367SKent Overstreet goto bkey_err; 26801c6fdbd8SKent Overstreet 26811c6fdbd8SKent Overstreet /* already reserved */ 268226609b61SKent Overstreet if (k.k->type == KEY_TYPE_reservation && 26831c6fdbd8SKent Overstreet bkey_s_c_to_reservation(k).v->nr_replicas >= replicas) { 2684*67e0dd8fSKent Overstreet bch2_btree_iter_advance(&iter); 26851c6fdbd8SKent Overstreet continue; 26861c6fdbd8SKent Overstreet } 26871c6fdbd8SKent Overstreet 2688190fa7afSKent Overstreet if (bkey_extent_is_data(k.k) && 2689190fa7afSKent Overstreet !(mode & FALLOC_FL_ZERO_RANGE)) { 2690*67e0dd8fSKent Overstreet bch2_btree_iter_advance(&iter); 26911c6fdbd8SKent Overstreet continue; 26921c6fdbd8SKent Overstreet } 26931c6fdbd8SKent Overstreet 26941c6fdbd8SKent Overstreet bkey_reservation_init(&reservation.k_i); 269526609b61SKent Overstreet reservation.k.type = KEY_TYPE_reservation; 26961c6fdbd8SKent Overstreet reservation.k.p = k.k->p; 26971c6fdbd8SKent Overstreet reservation.k.size = k.k->size; 26981c6fdbd8SKent Overstreet 2699*67e0dd8fSKent Overstreet bch2_cut_front(iter.pos, &reservation.k_i); 2700085ab693SKent Overstreet bch2_cut_back(end_pos, &reservation.k_i); 27011c6fdbd8SKent Overstreet 27021c6fdbd8SKent Overstreet sectors = reservation.k.size; 27034de77495SKent Overstreet reservation.v.nr_replicas = bch2_bkey_nr_ptrs_allocated(k); 27041c6fdbd8SKent Overstreet 27051c6fdbd8SKent Overstreet if (!bkey_extent_is_allocation(k.k)) { 27061c6fdbd8SKent Overstreet ret = bch2_quota_reservation_add(c, inode, 2707190fa7afSKent Overstreet "a_res, 27081c6fdbd8SKent Overstreet sectors, true); 27091c6fdbd8SKent Overstreet if (unlikely(ret)) 27100f238367SKent Overstreet goto bkey_err; 27111c6fdbd8SKent Overstreet } 27121c6fdbd8SKent Overstreet 27131c6fdbd8SKent Overstreet if (reservation.v.nr_replicas < replicas || 27144de77495SKent Overstreet bch2_bkey_sectors_compressed(k)) { 27151c6fdbd8SKent Overstreet ret = bch2_disk_reservation_get(c, &disk_res, sectors, 27161c6fdbd8SKent Overstreet replicas, 0); 27171c6fdbd8SKent Overstreet if (unlikely(ret)) 27180f238367SKent Overstreet goto bkey_err; 27191c6fdbd8SKent Overstreet 27201c6fdbd8SKent Overstreet reservation.v.nr_replicas = disk_res.nr_replicas; 27211c6fdbd8SKent Overstreet } 27221c6fdbd8SKent Overstreet 2723*67e0dd8fSKent Overstreet ret = bch2_extent_update(&trans, &iter, &reservation.k_i, 27242e87eae1SKent Overstreet &disk_res, &inode->ei_journal_seq, 2725a6336910SKent Overstreet 0, &i_sectors_delta, true); 27262e87eae1SKent Overstreet i_sectors_acct(c, inode, "a_res, i_sectors_delta); 27270f238367SKent Overstreet bkey_err: 2728190fa7afSKent Overstreet bch2_quota_reservation_put(c, inode, "a_res); 27291c6fdbd8SKent Overstreet bch2_disk_reservation_put(c, &disk_res); 27301c6fdbd8SKent Overstreet if (ret == -EINTR) 27311c6fdbd8SKent Overstreet ret = 0; 273250dc0f69SKent Overstreet } 2733*67e0dd8fSKent Overstreet bch2_trans_iter_exit(&trans, &iter); 2734694015c2SKent Overstreet bch2_trans_exit(&trans); 2735694015c2SKent Overstreet return ret; 2736694015c2SKent Overstreet } 273750dc0f69SKent Overstreet 2738694015c2SKent Overstreet static long bchfs_fallocate(struct bch_inode_info *inode, int mode, 2739694015c2SKent Overstreet loff_t offset, loff_t len) 2740694015c2SKent Overstreet { 2741694015c2SKent Overstreet struct address_space *mapping = inode->v.i_mapping; 2742694015c2SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 2743694015c2SKent Overstreet loff_t end = offset + len; 2744694015c2SKent Overstreet loff_t block_start = round_down(offset, block_bytes(c)); 2745694015c2SKent Overstreet loff_t block_end = round_up(end, block_bytes(c)); 2746694015c2SKent Overstreet int ret; 2747694015c2SKent Overstreet 2748694015c2SKent Overstreet inode_lock(&inode->v); 2749694015c2SKent Overstreet inode_dio_wait(&inode->v); 2750694015c2SKent Overstreet bch2_pagecache_block_get(&inode->ei_pagecache_lock); 2751694015c2SKent Overstreet 2752694015c2SKent Overstreet if (!(mode & FALLOC_FL_KEEP_SIZE) && end > inode->v.i_size) { 2753694015c2SKent Overstreet ret = inode_newsize_ok(&inode->v, end); 2754694015c2SKent Overstreet if (ret) 2755694015c2SKent Overstreet goto err; 2756694015c2SKent Overstreet } 2757694015c2SKent Overstreet 2758694015c2SKent Overstreet if (mode & FALLOC_FL_ZERO_RANGE) { 2759694015c2SKent Overstreet ret = __bch2_truncate_page(inode, 2760694015c2SKent Overstreet offset >> PAGE_SHIFT, 2761694015c2SKent Overstreet offset, end); 2762694015c2SKent Overstreet 2763694015c2SKent Overstreet if (!ret && 2764694015c2SKent Overstreet offset >> PAGE_SHIFT != end >> PAGE_SHIFT) 2765694015c2SKent Overstreet ret = __bch2_truncate_page(inode, 2766694015c2SKent Overstreet end >> PAGE_SHIFT, 2767694015c2SKent Overstreet offset, end); 2768694015c2SKent Overstreet 2769694015c2SKent Overstreet if (unlikely(ret)) 2770694015c2SKent Overstreet goto err; 2771694015c2SKent Overstreet 2772694015c2SKent Overstreet truncate_pagecache_range(&inode->v, offset, end - 1); 2773694015c2SKent Overstreet } 2774694015c2SKent Overstreet 2775694015c2SKent Overstreet ret = __bchfs_fallocate(inode, mode, block_start >> 9, block_end >> 9); 2776190fa7afSKent Overstreet if (ret) 2777190fa7afSKent Overstreet goto err; 2778e0541a93SKent Overstreet 2779e0541a93SKent Overstreet /* 2780e0541a93SKent Overstreet * Do we need to extend the file? 2781e0541a93SKent Overstreet * 2782e0541a93SKent Overstreet * If we zeroed up to the end of the file, we dropped whatever writes 2783e0541a93SKent Overstreet * were going to write out the current i_size, so we have to extend 2784e0541a93SKent Overstreet * manually even if FL_KEEP_SIZE was set: 2785e0541a93SKent Overstreet */ 2786e0541a93SKent Overstreet if (end >= inode->v.i_size && 2787e0541a93SKent Overstreet (!(mode & FALLOC_FL_KEEP_SIZE) || 2788e0541a93SKent Overstreet (mode & FALLOC_FL_ZERO_RANGE))) { 27891c6fdbd8SKent Overstreet 2790e0541a93SKent Overstreet /* 2791e0541a93SKent Overstreet * Sync existing appends before extending i_size, 2792e0541a93SKent Overstreet * as in bch2_extend(): 2793e0541a93SKent Overstreet */ 2794e0541a93SKent Overstreet ret = filemap_write_and_wait_range(mapping, 2795694015c2SKent Overstreet inode->ei_inode.bi_size, S64_MAX); 2796e0541a93SKent Overstreet if (ret) 2797e0541a93SKent Overstreet goto err; 2798e0541a93SKent Overstreet 2799e0541a93SKent Overstreet if (mode & FALLOC_FL_KEEP_SIZE) 2800e0541a93SKent Overstreet end = inode->v.i_size; 2801e0541a93SKent Overstreet else 2802e0541a93SKent Overstreet i_size_write(&inode->v, end); 2803e0541a93SKent Overstreet 28041c6fdbd8SKent Overstreet mutex_lock(&inode->ei_update_lock); 2805e0541a93SKent Overstreet ret = bch2_write_inode_size(c, inode, end, 0); 28061c6fdbd8SKent Overstreet mutex_unlock(&inode->ei_update_lock); 28071c6fdbd8SKent Overstreet } 28081c6fdbd8SKent Overstreet err: 28091c6fdbd8SKent Overstreet bch2_pagecache_block_put(&inode->ei_pagecache_lock); 28101c6fdbd8SKent Overstreet inode_unlock(&inode->v); 28111c6fdbd8SKent Overstreet return ret; 28121c6fdbd8SKent Overstreet } 28131c6fdbd8SKent Overstreet 28141c6fdbd8SKent Overstreet long bch2_fallocate_dispatch(struct file *file, int mode, 28151c6fdbd8SKent Overstreet loff_t offset, loff_t len) 28161c6fdbd8SKent Overstreet { 28171c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 28182a9101a9SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 28192a9101a9SKent Overstreet long ret; 28202a9101a9SKent Overstreet 28212a9101a9SKent Overstreet if (!percpu_ref_tryget(&c->writes)) 28222a9101a9SKent Overstreet return -EROFS; 28231c6fdbd8SKent Overstreet 28241c6fdbd8SKent Overstreet if (!(mode & ~(FALLOC_FL_KEEP_SIZE|FALLOC_FL_ZERO_RANGE))) 28252a9101a9SKent Overstreet ret = bchfs_fallocate(inode, mode, offset, len); 28262a9101a9SKent Overstreet else if (mode == (FALLOC_FL_PUNCH_HOLE|FALLOC_FL_KEEP_SIZE)) 28272a9101a9SKent Overstreet ret = bchfs_fpunch(inode, offset, len); 28282a9101a9SKent Overstreet else if (mode == FALLOC_FL_INSERT_RANGE) 28292a9101a9SKent Overstreet ret = bchfs_fcollapse_finsert(inode, offset, len, true); 28302a9101a9SKent Overstreet else if (mode == FALLOC_FL_COLLAPSE_RANGE) 28312a9101a9SKent Overstreet ret = bchfs_fcollapse_finsert(inode, offset, len, false); 28322a9101a9SKent Overstreet else 28332a9101a9SKent Overstreet ret = -EOPNOTSUPP; 28341c6fdbd8SKent Overstreet 28352a9101a9SKent Overstreet percpu_ref_put(&c->writes); 28361c6fdbd8SKent Overstreet 28372a9101a9SKent Overstreet return ret; 28381c6fdbd8SKent Overstreet } 28391c6fdbd8SKent Overstreet 284076426098SKent Overstreet static void mark_range_unallocated(struct bch_inode_info *inode, 284176426098SKent Overstreet loff_t start, loff_t end) 284276426098SKent Overstreet { 284376426098SKent Overstreet pgoff_t index = start >> PAGE_SHIFT; 284476426098SKent Overstreet pgoff_t end_index = (end - 1) >> PAGE_SHIFT; 284576426098SKent Overstreet struct folio_batch fbatch; 284676426098SKent Overstreet unsigned i, j; 284776426098SKent Overstreet 284876426098SKent Overstreet folio_batch_init(&fbatch); 284976426098SKent Overstreet 285076426098SKent Overstreet while (filemap_get_folios(inode->v.i_mapping, 285176426098SKent Overstreet &index, end_index, &fbatch)) { 285276426098SKent Overstreet for (i = 0; i < folio_batch_count(&fbatch); i++) { 285376426098SKent Overstreet struct folio *folio = fbatch.folios[i]; 285476426098SKent Overstreet struct bch_page_state *s; 285576426098SKent Overstreet 285676426098SKent Overstreet folio_lock(folio); 285776426098SKent Overstreet s = bch2_page_state(&folio->page); 285876426098SKent Overstreet 28593826ee0bSKent Overstreet if (s) { 28603826ee0bSKent Overstreet spin_lock(&s->lock); 286176426098SKent Overstreet for (j = 0; j < PAGE_SECTORS; j++) 286276426098SKent Overstreet s->s[j].nr_replicas = 0; 28633826ee0bSKent Overstreet spin_unlock(&s->lock); 28643826ee0bSKent Overstreet } 286576426098SKent Overstreet 286676426098SKent Overstreet folio_unlock(folio); 286776426098SKent Overstreet } 286876426098SKent Overstreet folio_batch_release(&fbatch); 286976426098SKent Overstreet cond_resched(); 287076426098SKent Overstreet } 287176426098SKent Overstreet } 287276426098SKent Overstreet 287376426098SKent Overstreet loff_t bch2_remap_file_range(struct file *file_src, loff_t pos_src, 287476426098SKent Overstreet struct file *file_dst, loff_t pos_dst, 287576426098SKent Overstreet loff_t len, unsigned remap_flags) 287676426098SKent Overstreet { 287776426098SKent Overstreet struct bch_inode_info *src = file_bch_inode(file_src); 287876426098SKent Overstreet struct bch_inode_info *dst = file_bch_inode(file_dst); 287976426098SKent Overstreet struct bch_fs *c = src->v.i_sb->s_fs_info; 28802e87eae1SKent Overstreet s64 i_sectors_delta = 0; 2881677fc056SKent Overstreet u64 aligned_len; 288276426098SKent Overstreet loff_t ret = 0; 288376426098SKent Overstreet 288476426098SKent Overstreet if (remap_flags & ~(REMAP_FILE_DEDUP|REMAP_FILE_ADVISORY)) 288576426098SKent Overstreet return -EINVAL; 288676426098SKent Overstreet 288776426098SKent Overstreet if (remap_flags & REMAP_FILE_DEDUP) 288876426098SKent Overstreet return -EOPNOTSUPP; 288976426098SKent Overstreet 289076426098SKent Overstreet if ((pos_src & (block_bytes(c) - 1)) || 289176426098SKent Overstreet (pos_dst & (block_bytes(c) - 1))) 289276426098SKent Overstreet return -EINVAL; 289376426098SKent Overstreet 289476426098SKent Overstreet if (src == dst && 289576426098SKent Overstreet abs(pos_src - pos_dst) < len) 289676426098SKent Overstreet return -EINVAL; 289776426098SKent Overstreet 289876426098SKent Overstreet bch2_lock_inodes(INODE_LOCK|INODE_PAGECACHE_BLOCK, src, dst); 289976426098SKent Overstreet 29002e87eae1SKent Overstreet file_update_time(file_dst); 29012e87eae1SKent Overstreet 290276426098SKent Overstreet inode_dio_wait(&src->v); 290376426098SKent Overstreet inode_dio_wait(&dst->v); 290476426098SKent Overstreet 290576426098SKent Overstreet ret = generic_remap_file_range_prep(file_src, pos_src, 290676426098SKent Overstreet file_dst, pos_dst, 290776426098SKent Overstreet &len, remap_flags); 290876426098SKent Overstreet if (ret < 0 || len == 0) 29092e87eae1SKent Overstreet goto err; 291076426098SKent Overstreet 2911677fc056SKent Overstreet aligned_len = round_up((u64) len, block_bytes(c)); 291276426098SKent Overstreet 291376426098SKent Overstreet ret = write_invalidate_inode_pages_range(dst->v.i_mapping, 2914677fc056SKent Overstreet pos_dst, pos_dst + len - 1); 291576426098SKent Overstreet if (ret) 29162e87eae1SKent Overstreet goto err; 291776426098SKent Overstreet 291876426098SKent Overstreet mark_range_unallocated(src, pos_src, pos_src + aligned_len); 291976426098SKent Overstreet 29202e87eae1SKent Overstreet ret = bch2_remap_range(c, 292176426098SKent Overstreet POS(dst->v.i_ino, pos_dst >> 9), 292276426098SKent Overstreet POS(src->v.i_ino, pos_src >> 9), 292376426098SKent Overstreet aligned_len >> 9, 29242e87eae1SKent Overstreet &dst->ei_journal_seq, 29252e87eae1SKent Overstreet pos_dst + len, &i_sectors_delta); 29262e87eae1SKent Overstreet if (ret < 0) 29272e87eae1SKent Overstreet goto err; 292876426098SKent Overstreet 29292e87eae1SKent Overstreet /* 29302e87eae1SKent Overstreet * due to alignment, we might have remapped slightly more than requsted 29312e87eae1SKent Overstreet */ 2932677fc056SKent Overstreet ret = min((u64) ret << 9, (u64) len); 29332e87eae1SKent Overstreet 29342e87eae1SKent Overstreet /* XXX get a quota reservation */ 29352e87eae1SKent Overstreet i_sectors_acct(c, dst, NULL, i_sectors_delta); 29362e87eae1SKent Overstreet 29372e87eae1SKent Overstreet spin_lock(&dst->v.i_lock); 2938677fc056SKent Overstreet if (pos_dst + ret > dst->v.i_size) 2939677fc056SKent Overstreet i_size_write(&dst->v, pos_dst + ret); 29402e87eae1SKent Overstreet spin_unlock(&dst->v.i_lock); 2941e7084c9cSKent Overstreet 2942e7084c9cSKent Overstreet if (((file_dst->f_flags & (__O_SYNC | O_DSYNC)) || 2943e7084c9cSKent Overstreet IS_SYNC(file_inode(file_dst))) && 2944e7084c9cSKent Overstreet !c->opts.journal_flush_disabled) 2945e7084c9cSKent Overstreet ret = bch2_journal_flush_seq(&c->journal, dst->ei_journal_seq); 29462e87eae1SKent Overstreet err: 294776426098SKent Overstreet bch2_unlock_inodes(INODE_LOCK|INODE_PAGECACHE_BLOCK, src, dst); 294876426098SKent Overstreet 294976426098SKent Overstreet return ret; 295076426098SKent Overstreet } 295176426098SKent Overstreet 29521c6fdbd8SKent Overstreet /* fseek: */ 29531c6fdbd8SKent Overstreet 2954543ef2ebSKent Overstreet static int folio_data_offset(struct folio *folio, unsigned offset) 29551c6fdbd8SKent Overstreet { 2956f57a6a5dSKent Overstreet struct bch_page_state *s = bch2_page_state(&folio->page); 2957f57a6a5dSKent Overstreet unsigned i; 2958f81b648dSKent Overstreet 2959543ef2ebSKent Overstreet if (s) 2960543ef2ebSKent Overstreet for (i = offset >> 9; i < PAGE_SECTORS; i++) 2961f57a6a5dSKent Overstreet if (s->s[i].state >= SECTOR_DIRTY) 2962543ef2ebSKent Overstreet return i << 9; 2963f57a6a5dSKent Overstreet 2964543ef2ebSKent Overstreet return -1; 29651c6fdbd8SKent Overstreet } 29661c6fdbd8SKent Overstreet 2967543ef2ebSKent Overstreet static loff_t bch2_seek_pagecache_data(struct inode *vinode, 29681c6fdbd8SKent Overstreet loff_t start_offset, 29691c6fdbd8SKent Overstreet loff_t end_offset) 29701c6fdbd8SKent Overstreet { 29711c6fdbd8SKent Overstreet struct folio_batch fbatch; 29721c6fdbd8SKent Overstreet pgoff_t start_index = start_offset >> PAGE_SHIFT; 29731c6fdbd8SKent Overstreet pgoff_t end_index = end_offset >> PAGE_SHIFT; 29741c6fdbd8SKent Overstreet pgoff_t index = start_index; 29751c6fdbd8SKent Overstreet unsigned i; 2976543ef2ebSKent Overstreet loff_t ret; 2977543ef2ebSKent Overstreet int offset; 29781c6fdbd8SKent Overstreet 29791c6fdbd8SKent Overstreet folio_batch_init(&fbatch); 29801c6fdbd8SKent Overstreet 29811c6fdbd8SKent Overstreet while (filemap_get_folios(vinode->i_mapping, 29821c6fdbd8SKent Overstreet &index, end_index, &fbatch)) { 29831c6fdbd8SKent Overstreet for (i = 0; i < folio_batch_count(&fbatch); i++) { 29841c6fdbd8SKent Overstreet struct folio *folio = fbatch.folios[i]; 29851c6fdbd8SKent Overstreet 29861c6fdbd8SKent Overstreet folio_lock(folio); 2987543ef2ebSKent Overstreet offset = folio_data_offset(folio, 2988543ef2ebSKent Overstreet folio->index == start_index 2989543ef2ebSKent Overstreet ? start_offset & (PAGE_SIZE - 1) 2990543ef2ebSKent Overstreet : 0); 2991543ef2ebSKent Overstreet if (offset >= 0) { 2992543ef2ebSKent Overstreet ret = clamp(((loff_t) folio->index << PAGE_SHIFT) + 2993543ef2ebSKent Overstreet offset, 2994543ef2ebSKent Overstreet start_offset, end_offset); 29951c6fdbd8SKent Overstreet folio_unlock(folio); 29961c6fdbd8SKent Overstreet folio_batch_release(&fbatch); 2997543ef2ebSKent Overstreet return ret; 29981c6fdbd8SKent Overstreet } 29991c6fdbd8SKent Overstreet folio_unlock(folio); 30001c6fdbd8SKent Overstreet } 30011c6fdbd8SKent Overstreet folio_batch_release(&fbatch); 30021c6fdbd8SKent Overstreet cond_resched(); 30031c6fdbd8SKent Overstreet } 30041c6fdbd8SKent Overstreet 30051c6fdbd8SKent Overstreet return end_offset; 30061c6fdbd8SKent Overstreet } 30071c6fdbd8SKent Overstreet 30081c6fdbd8SKent Overstreet static loff_t bch2_seek_data(struct file *file, u64 offset) 30091c6fdbd8SKent Overstreet { 30101c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 30111c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 3012424eb881SKent Overstreet struct btree_trans trans; 3013*67e0dd8fSKent Overstreet struct btree_iter iter; 30141c6fdbd8SKent Overstreet struct bkey_s_c k; 30151c6fdbd8SKent Overstreet u64 isize, next_data = MAX_LFS_FILESIZE; 30161c6fdbd8SKent Overstreet int ret; 30171c6fdbd8SKent Overstreet 30181c6fdbd8SKent Overstreet isize = i_size_read(&inode->v); 30191c6fdbd8SKent Overstreet if (offset >= isize) 30201c6fdbd8SKent Overstreet return -ENXIO; 30211c6fdbd8SKent Overstreet 302220bceecbSKent Overstreet bch2_trans_init(&trans, c, 0, 0); 3023424eb881SKent Overstreet 302441f8b09eSKent Overstreet for_each_btree_key(&trans, iter, BTREE_ID_extents, 302594f651e2SKent Overstreet POS(inode->v.i_ino, offset >> 9), 0, k, ret) { 30261c6fdbd8SKent Overstreet if (k.k->p.inode != inode->v.i_ino) { 30271c6fdbd8SKent Overstreet break; 30281c6fdbd8SKent Overstreet } else if (bkey_extent_is_data(k.k)) { 30291c6fdbd8SKent Overstreet next_data = max(offset, bkey_start_offset(k.k) << 9); 30301c6fdbd8SKent Overstreet break; 30311c6fdbd8SKent Overstreet } else if (k.k->p.offset >> 9 > isize) 30321c6fdbd8SKent Overstreet break; 30331c6fdbd8SKent Overstreet } 3034*67e0dd8fSKent Overstreet bch2_trans_iter_exit(&trans, &iter); 30351c6fdbd8SKent Overstreet 303694f651e2SKent Overstreet ret = bch2_trans_exit(&trans) ?: ret; 30371c6fdbd8SKent Overstreet if (ret) 30381c6fdbd8SKent Overstreet return ret; 30391c6fdbd8SKent Overstreet 30401c6fdbd8SKent Overstreet if (next_data > offset) 3041543ef2ebSKent Overstreet next_data = bch2_seek_pagecache_data(&inode->v, 30421c6fdbd8SKent Overstreet offset, next_data); 30431c6fdbd8SKent Overstreet 3044e10d3094SKent Overstreet if (next_data >= isize) 30451c6fdbd8SKent Overstreet return -ENXIO; 30461c6fdbd8SKent Overstreet 30471c6fdbd8SKent Overstreet return vfs_setpos(file, next_data, MAX_LFS_FILESIZE); 30481c6fdbd8SKent Overstreet } 30491c6fdbd8SKent Overstreet 3050543ef2ebSKent Overstreet static int __page_hole_offset(struct page *page, unsigned offset) 30511c6fdbd8SKent Overstreet { 3052543ef2ebSKent Overstreet struct bch_page_state *s = bch2_page_state(page); 3053543ef2ebSKent Overstreet unsigned i; 3054543ef2ebSKent Overstreet 3055543ef2ebSKent Overstreet if (!s) 3056543ef2ebSKent Overstreet return 0; 3057543ef2ebSKent Overstreet 3058543ef2ebSKent Overstreet for (i = offset >> 9; i < PAGE_SECTORS; i++) 3059543ef2ebSKent Overstreet if (s->s[i].state < SECTOR_DIRTY) 3060543ef2ebSKent Overstreet return i << 9; 3061543ef2ebSKent Overstreet 3062543ef2ebSKent Overstreet return -1; 3063543ef2ebSKent Overstreet } 3064543ef2ebSKent Overstreet 3065543ef2ebSKent Overstreet static loff_t page_hole_offset(struct address_space *mapping, loff_t offset) 3066543ef2ebSKent Overstreet { 3067543ef2ebSKent Overstreet pgoff_t index = offset >> PAGE_SHIFT; 30681c6fdbd8SKent Overstreet struct page *page; 3069543ef2ebSKent Overstreet int pg_offset; 3070543ef2ebSKent Overstreet loff_t ret = -1; 30711c6fdbd8SKent Overstreet 30721c6fdbd8SKent Overstreet page = find_lock_page(mapping, index); 30731c6fdbd8SKent Overstreet if (!page) 3074543ef2ebSKent Overstreet return offset; 30751c6fdbd8SKent Overstreet 3076543ef2ebSKent Overstreet pg_offset = __page_hole_offset(page, offset & (PAGE_SIZE - 1)); 3077543ef2ebSKent Overstreet if (pg_offset >= 0) 3078543ef2ebSKent Overstreet ret = ((loff_t) index << PAGE_SHIFT) + pg_offset; 3079543ef2ebSKent Overstreet 30801c6fdbd8SKent Overstreet unlock_page(page); 30811c6fdbd8SKent Overstreet 30821c6fdbd8SKent Overstreet return ret; 30831c6fdbd8SKent Overstreet } 30841c6fdbd8SKent Overstreet 3085543ef2ebSKent Overstreet static loff_t bch2_seek_pagecache_hole(struct inode *vinode, 30861c6fdbd8SKent Overstreet loff_t start_offset, 30871c6fdbd8SKent Overstreet loff_t end_offset) 30881c6fdbd8SKent Overstreet { 30891c6fdbd8SKent Overstreet struct address_space *mapping = vinode->i_mapping; 3090543ef2ebSKent Overstreet loff_t offset = start_offset, hole; 30911c6fdbd8SKent Overstreet 3092543ef2ebSKent Overstreet while (offset < end_offset) { 3093543ef2ebSKent Overstreet hole = page_hole_offset(mapping, offset); 3094543ef2ebSKent Overstreet if (hole >= 0 && hole <= end_offset) 3095543ef2ebSKent Overstreet return max(start_offset, hole); 3096543ef2ebSKent Overstreet 3097543ef2ebSKent Overstreet offset += PAGE_SIZE; 3098543ef2ebSKent Overstreet offset &= PAGE_MASK; 3099543ef2ebSKent Overstreet } 31001c6fdbd8SKent Overstreet 31011c6fdbd8SKent Overstreet return end_offset; 31021c6fdbd8SKent Overstreet } 31031c6fdbd8SKent Overstreet 31041c6fdbd8SKent Overstreet static loff_t bch2_seek_hole(struct file *file, u64 offset) 31051c6fdbd8SKent Overstreet { 31061c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 31071c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 3108424eb881SKent Overstreet struct btree_trans trans; 3109*67e0dd8fSKent Overstreet struct btree_iter iter; 31101c6fdbd8SKent Overstreet struct bkey_s_c k; 31111c6fdbd8SKent Overstreet u64 isize, next_hole = MAX_LFS_FILESIZE; 31121c6fdbd8SKent Overstreet int ret; 31131c6fdbd8SKent Overstreet 31141c6fdbd8SKent Overstreet isize = i_size_read(&inode->v); 31151c6fdbd8SKent Overstreet if (offset >= isize) 31161c6fdbd8SKent Overstreet return -ENXIO; 31171c6fdbd8SKent Overstreet 311820bceecbSKent Overstreet bch2_trans_init(&trans, c, 0, 0); 3119424eb881SKent Overstreet 312041f8b09eSKent Overstreet for_each_btree_key(&trans, iter, BTREE_ID_extents, 31211c6fdbd8SKent Overstreet POS(inode->v.i_ino, offset >> 9), 312294f651e2SKent Overstreet BTREE_ITER_SLOTS, k, ret) { 31231c6fdbd8SKent Overstreet if (k.k->p.inode != inode->v.i_ino) { 3124543ef2ebSKent Overstreet next_hole = bch2_seek_pagecache_hole(&inode->v, 31251c6fdbd8SKent Overstreet offset, MAX_LFS_FILESIZE); 31261c6fdbd8SKent Overstreet break; 31271c6fdbd8SKent Overstreet } else if (!bkey_extent_is_data(k.k)) { 3128543ef2ebSKent Overstreet next_hole = bch2_seek_pagecache_hole(&inode->v, 31291c6fdbd8SKent Overstreet max(offset, bkey_start_offset(k.k) << 9), 31301c6fdbd8SKent Overstreet k.k->p.offset << 9); 31311c6fdbd8SKent Overstreet 31321c6fdbd8SKent Overstreet if (next_hole < k.k->p.offset << 9) 31331c6fdbd8SKent Overstreet break; 31341c6fdbd8SKent Overstreet } else { 31351c6fdbd8SKent Overstreet offset = max(offset, bkey_start_offset(k.k) << 9); 31361c6fdbd8SKent Overstreet } 31371c6fdbd8SKent Overstreet } 3138*67e0dd8fSKent Overstreet bch2_trans_iter_exit(&trans, &iter); 31391c6fdbd8SKent Overstreet 314094f651e2SKent Overstreet ret = bch2_trans_exit(&trans) ?: ret; 31411c6fdbd8SKent Overstreet if (ret) 31421c6fdbd8SKent Overstreet return ret; 31431c6fdbd8SKent Overstreet 31441c6fdbd8SKent Overstreet if (next_hole > isize) 31451c6fdbd8SKent Overstreet next_hole = isize; 31461c6fdbd8SKent Overstreet 31471c6fdbd8SKent Overstreet return vfs_setpos(file, next_hole, MAX_LFS_FILESIZE); 31481c6fdbd8SKent Overstreet } 31491c6fdbd8SKent Overstreet 31501c6fdbd8SKent Overstreet loff_t bch2_llseek(struct file *file, loff_t offset, int whence) 31511c6fdbd8SKent Overstreet { 31521c6fdbd8SKent Overstreet switch (whence) { 31531c6fdbd8SKent Overstreet case SEEK_SET: 31541c6fdbd8SKent Overstreet case SEEK_CUR: 31551c6fdbd8SKent Overstreet case SEEK_END: 31561c6fdbd8SKent Overstreet return generic_file_llseek(file, offset, whence); 31571c6fdbd8SKent Overstreet case SEEK_DATA: 31581c6fdbd8SKent Overstreet return bch2_seek_data(file, offset); 31591c6fdbd8SKent Overstreet case SEEK_HOLE: 31601c6fdbd8SKent Overstreet return bch2_seek_hole(file, offset); 31611c6fdbd8SKent Overstreet } 31621c6fdbd8SKent Overstreet 31631c6fdbd8SKent Overstreet return -EINVAL; 31641c6fdbd8SKent Overstreet } 31651c6fdbd8SKent Overstreet 31661c6fdbd8SKent Overstreet void bch2_fs_fsio_exit(struct bch_fs *c) 31671c6fdbd8SKent Overstreet { 31681c6fdbd8SKent Overstreet bioset_exit(&c->dio_write_bioset); 31691c6fdbd8SKent Overstreet bioset_exit(&c->dio_read_bioset); 31701c6fdbd8SKent Overstreet bioset_exit(&c->writepage_bioset); 31711c6fdbd8SKent Overstreet } 31721c6fdbd8SKent Overstreet 31731c6fdbd8SKent Overstreet int bch2_fs_fsio_init(struct bch_fs *c) 31741c6fdbd8SKent Overstreet { 31751c6fdbd8SKent Overstreet int ret = 0; 31761c6fdbd8SKent Overstreet 31771c6fdbd8SKent Overstreet pr_verbose_init(c->opts, ""); 31781c6fdbd8SKent Overstreet 31791c6fdbd8SKent Overstreet if (bioset_init(&c->writepage_bioset, 31809a3df993SKent Overstreet 4, offsetof(struct bch_writepage_io, op.wbio.bio), 31811c6fdbd8SKent Overstreet BIOSET_NEED_BVECS) || 31821c6fdbd8SKent Overstreet bioset_init(&c->dio_read_bioset, 31831c6fdbd8SKent Overstreet 4, offsetof(struct dio_read, rbio.bio), 31841c6fdbd8SKent Overstreet BIOSET_NEED_BVECS) || 31851c6fdbd8SKent Overstreet bioset_init(&c->dio_write_bioset, 31869a3df993SKent Overstreet 4, offsetof(struct dio_write, op.wbio.bio), 31871c6fdbd8SKent Overstreet BIOSET_NEED_BVECS)) 31881c6fdbd8SKent Overstreet ret = -ENOMEM; 31891c6fdbd8SKent Overstreet 31901c6fdbd8SKent Overstreet pr_verbose_init(c->opts, "ret %i", ret); 31911c6fdbd8SKent Overstreet return ret; 31921c6fdbd8SKent Overstreet } 31931c6fdbd8SKent Overstreet 31941c6fdbd8SKent Overstreet #endif /* NO_BCACHEFS_FS */ 3195