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); 234b44a66a6SKent Overstreet BUG_ON((s64) inode->v.i_blocks + sectors < 0); 235b44a66a6SKent Overstreet inode->v.i_blocks += sectors; 236b44a66a6SKent Overstreet 2371c6fdbd8SKent Overstreet #ifdef CONFIG_BCACHEFS_QUOTA 2381c6fdbd8SKent Overstreet if (quota_res && sectors > 0) { 2391c6fdbd8SKent Overstreet BUG_ON(sectors > quota_res->sectors); 2401c6fdbd8SKent Overstreet BUG_ON(sectors > inode->ei_quota_reserved); 2411c6fdbd8SKent Overstreet 2421c6fdbd8SKent Overstreet quota_res->sectors -= sectors; 2431c6fdbd8SKent Overstreet inode->ei_quota_reserved -= sectors; 2441c6fdbd8SKent Overstreet } else { 24526609b61SKent Overstreet bch2_quota_acct(c, inode->ei_qid, Q_SPC, sectors, KEY_TYPE_QUOTA_WARN); 2461c6fdbd8SKent Overstreet } 2471c6fdbd8SKent Overstreet #endif 2481c6fdbd8SKent Overstreet mutex_unlock(&inode->ei_quota_lock); 2491c6fdbd8SKent Overstreet } 2501c6fdbd8SKent Overstreet 2511c6fdbd8SKent Overstreet /* page state: */ 2521c6fdbd8SKent Overstreet 2531c6fdbd8SKent Overstreet /* stored in page->private: */ 2541c6fdbd8SKent Overstreet 255f57a6a5dSKent Overstreet struct bch_page_sector { 256b44a66a6SKent Overstreet /* Uncompressed, fully allocated replicas (or on disk reservation): */ 257b44a66a6SKent Overstreet unsigned nr_replicas:4; 258f81b648dSKent Overstreet 259b44a66a6SKent Overstreet /* Owns PAGE_SECTORS * replicas_reserved sized in memory reservation: */ 260b44a66a6SKent Overstreet unsigned replicas_reserved:4; 2611c6fdbd8SKent Overstreet 262f57a6a5dSKent Overstreet /* i_sectors: */ 263f57a6a5dSKent Overstreet enum { 264f57a6a5dSKent Overstreet SECTOR_UNALLOCATED, 2652ba5d38bSKent Overstreet SECTOR_RESERVED, 266f57a6a5dSKent Overstreet SECTOR_DIRTY, 267b44a66a6SKent Overstreet SECTOR_DIRTY_RESERVED, 268f57a6a5dSKent Overstreet SECTOR_ALLOCATED, 269b44a66a6SKent Overstreet } state:8; 2701c6fdbd8SKent Overstreet }; 2711c6fdbd8SKent Overstreet 272f57a6a5dSKent Overstreet struct bch_page_state { 2733826ee0bSKent Overstreet spinlock_t lock; 2747f5e31e1SKent Overstreet atomic_t write_count; 275*e6ec361fSKent Overstreet bool uptodate; 276f57a6a5dSKent Overstreet struct bch_page_sector s[PAGE_SECTORS]; 277f57a6a5dSKent Overstreet }; 278f57a6a5dSKent Overstreet 279f57a6a5dSKent Overstreet static inline struct bch_page_state *__bch2_page_state(struct page *page) 2801c6fdbd8SKent Overstreet { 281f57a6a5dSKent Overstreet return page_has_private(page) 282f57a6a5dSKent Overstreet ? (struct bch_page_state *) page_private(page) 283f57a6a5dSKent Overstreet : NULL; 284f57a6a5dSKent Overstreet } 2851c6fdbd8SKent Overstreet 286f57a6a5dSKent Overstreet static inline struct bch_page_state *bch2_page_state(struct page *page) 287f57a6a5dSKent Overstreet { 288e1036a2aSKent Overstreet EBUG_ON(!PageLocked(page)); 2891c6fdbd8SKent Overstreet 290f57a6a5dSKent Overstreet return __bch2_page_state(page); 291f57a6a5dSKent Overstreet } 292f57a6a5dSKent Overstreet 293f57a6a5dSKent Overstreet /* for newly allocated pages: */ 294f57a6a5dSKent Overstreet static void __bch2_page_state_release(struct page *page) 295f57a6a5dSKent Overstreet { 29600276f9fSMatthew Wilcox (Oracle) kfree(detach_page_private(page)); 297f57a6a5dSKent Overstreet } 298f57a6a5dSKent Overstreet 299f57a6a5dSKent Overstreet static void bch2_page_state_release(struct page *page) 300f57a6a5dSKent Overstreet { 30100276f9fSMatthew Wilcox (Oracle) EBUG_ON(!PageLocked(page)); 30200276f9fSMatthew Wilcox (Oracle) __bch2_page_state_release(page); 303f57a6a5dSKent Overstreet } 304f57a6a5dSKent Overstreet 305f57a6a5dSKent Overstreet /* for newly allocated pages: */ 306f57a6a5dSKent Overstreet static struct bch_page_state *__bch2_page_state_create(struct page *page, 307f57a6a5dSKent Overstreet gfp_t gfp) 308f57a6a5dSKent Overstreet { 309f57a6a5dSKent Overstreet struct bch_page_state *s; 310f57a6a5dSKent Overstreet 311f57a6a5dSKent Overstreet s = kzalloc(sizeof(*s), GFP_NOFS|gfp); 312f57a6a5dSKent Overstreet if (!s) 313f57a6a5dSKent Overstreet return NULL; 314f57a6a5dSKent Overstreet 3153826ee0bSKent Overstreet spin_lock_init(&s->lock); 31600276f9fSMatthew Wilcox (Oracle) attach_page_private(page, s); 3171c6fdbd8SKent Overstreet return s; 3181c6fdbd8SKent Overstreet } 3191c6fdbd8SKent Overstreet 320f57a6a5dSKent Overstreet static struct bch_page_state *bch2_page_state_create(struct page *page, 321f57a6a5dSKent Overstreet gfp_t gfp) 322f57a6a5dSKent Overstreet { 323f57a6a5dSKent Overstreet return bch2_page_state(page) ?: __bch2_page_state_create(page, gfp); 324f57a6a5dSKent Overstreet } 325f57a6a5dSKent Overstreet 326b44a66a6SKent Overstreet static unsigned bkey_to_sector_state(const struct bkey *k) 327b44a66a6SKent Overstreet { 328b44a66a6SKent Overstreet if (k->type == KEY_TYPE_reservation) 329b44a66a6SKent Overstreet return SECTOR_RESERVED; 330b44a66a6SKent Overstreet if (bkey_extent_is_allocation(k)) 331b44a66a6SKent Overstreet return SECTOR_ALLOCATED; 332b44a66a6SKent Overstreet return SECTOR_UNALLOCATED; 333b44a66a6SKent Overstreet } 334b44a66a6SKent Overstreet 335*e6ec361fSKent Overstreet static void __bch2_page_state_set(struct page *page, 336*e6ec361fSKent Overstreet unsigned pg_offset, unsigned pg_len, 337*e6ec361fSKent Overstreet unsigned nr_ptrs, unsigned state) 338*e6ec361fSKent Overstreet { 339*e6ec361fSKent Overstreet struct bch_page_state *s = bch2_page_state_create(page, __GFP_NOFAIL); 340*e6ec361fSKent Overstreet unsigned i; 341*e6ec361fSKent Overstreet 342*e6ec361fSKent Overstreet BUG_ON(pg_offset >= PAGE_SECTORS); 343*e6ec361fSKent Overstreet BUG_ON(pg_offset + pg_len > PAGE_SECTORS); 344*e6ec361fSKent Overstreet 345*e6ec361fSKent Overstreet spin_lock(&s->lock); 346*e6ec361fSKent Overstreet 347*e6ec361fSKent Overstreet for (i = pg_offset; i < pg_offset + pg_len; i++) { 348*e6ec361fSKent Overstreet s->s[i].nr_replicas = nr_ptrs; 349*e6ec361fSKent Overstreet s->s[i].state = state; 350*e6ec361fSKent Overstreet } 351*e6ec361fSKent Overstreet 352*e6ec361fSKent Overstreet if (i == PAGE_SECTORS) 353*e6ec361fSKent Overstreet s->uptodate = true; 354*e6ec361fSKent Overstreet 355*e6ec361fSKent Overstreet spin_unlock(&s->lock); 356*e6ec361fSKent Overstreet } 357*e6ec361fSKent Overstreet 358*e6ec361fSKent Overstreet static int bch2_page_state_set(struct bch_fs *c, subvol_inum inum, 359*e6ec361fSKent Overstreet struct page **pages, unsigned nr_pages) 360*e6ec361fSKent Overstreet { 361*e6ec361fSKent Overstreet struct btree_trans trans; 362*e6ec361fSKent Overstreet struct btree_iter iter; 363*e6ec361fSKent Overstreet struct bkey_s_c k; 364*e6ec361fSKent Overstreet u64 offset = pages[0]->index << PAGE_SECTORS_SHIFT; 365*e6ec361fSKent Overstreet unsigned pg_idx = 0; 366*e6ec361fSKent Overstreet u32 snapshot; 367*e6ec361fSKent Overstreet int ret; 368*e6ec361fSKent Overstreet 369*e6ec361fSKent Overstreet bch2_trans_init(&trans, c, 0, 0); 370*e6ec361fSKent Overstreet retry: 371*e6ec361fSKent Overstreet bch2_trans_begin(&trans); 372*e6ec361fSKent Overstreet 373*e6ec361fSKent Overstreet ret = bch2_subvolume_get_snapshot(&trans, inum.subvol, &snapshot); 374*e6ec361fSKent Overstreet if (ret) 375*e6ec361fSKent Overstreet goto err; 376*e6ec361fSKent Overstreet 377*e6ec361fSKent Overstreet for_each_btree_key_norestart(&trans, iter, BTREE_ID_extents, 378*e6ec361fSKent Overstreet SPOS(inum.inum, offset, snapshot), 379*e6ec361fSKent Overstreet BTREE_ITER_SLOTS, k, ret) { 380*e6ec361fSKent Overstreet unsigned nr_ptrs = bch2_bkey_nr_ptrs_fully_allocated(k); 381*e6ec361fSKent Overstreet unsigned state = bkey_to_sector_state(k.k); 382*e6ec361fSKent Overstreet 383*e6ec361fSKent Overstreet while (pg_idx < nr_pages) { 384*e6ec361fSKent Overstreet struct page *page = pages[pg_idx]; 385*e6ec361fSKent Overstreet u64 pg_start = page->index << PAGE_SECTORS_SHIFT; 386*e6ec361fSKent Overstreet u64 pg_end = (page->index + 1) << PAGE_SECTORS_SHIFT; 387*e6ec361fSKent Overstreet unsigned pg_offset = max(bkey_start_offset(k.k), pg_start) - pg_start; 388*e6ec361fSKent Overstreet unsigned pg_len = min(k.k->p.offset, pg_end) - pg_offset - pg_start; 389*e6ec361fSKent Overstreet 390*e6ec361fSKent Overstreet BUG_ON(k.k->p.offset < pg_start); 391*e6ec361fSKent Overstreet BUG_ON(bkey_start_offset(k.k) > pg_end); 392*e6ec361fSKent Overstreet 393*e6ec361fSKent Overstreet if (!bch2_page_state_create(page, __GFP_NOFAIL)->uptodate) 394*e6ec361fSKent Overstreet __bch2_page_state_set(page, pg_offset, pg_len, nr_ptrs, state); 395*e6ec361fSKent Overstreet 396*e6ec361fSKent Overstreet if (k.k->p.offset < pg_end) 397*e6ec361fSKent Overstreet break; 398*e6ec361fSKent Overstreet pg_idx++; 399*e6ec361fSKent Overstreet } 400*e6ec361fSKent Overstreet 401*e6ec361fSKent Overstreet if (pg_idx == nr_pages) 402*e6ec361fSKent Overstreet break; 403*e6ec361fSKent Overstreet } 404*e6ec361fSKent Overstreet 405*e6ec361fSKent Overstreet offset = iter.pos.offset; 406*e6ec361fSKent Overstreet bch2_trans_iter_exit(&trans, &iter); 407*e6ec361fSKent Overstreet err: 408*e6ec361fSKent Overstreet if (ret == -EINTR) 409*e6ec361fSKent Overstreet goto retry; 410*e6ec361fSKent Overstreet bch2_trans_exit(&trans); 411*e6ec361fSKent Overstreet 412*e6ec361fSKent Overstreet return ret; 413*e6ec361fSKent Overstreet } 414*e6ec361fSKent Overstreet 415b44a66a6SKent Overstreet static void bch2_bio_page_state_set(struct bio *bio, struct bkey_s_c k) 416b44a66a6SKent Overstreet { 417b44a66a6SKent Overstreet struct bvec_iter iter; 418b44a66a6SKent Overstreet struct bio_vec bv; 419b44a66a6SKent Overstreet unsigned nr_ptrs = k.k->type == KEY_TYPE_reflink_v 420b44a66a6SKent Overstreet ? 0 : bch2_bkey_nr_ptrs_fully_allocated(k); 421b44a66a6SKent Overstreet unsigned state = bkey_to_sector_state(k.k); 422b44a66a6SKent Overstreet 423*e6ec361fSKent Overstreet bio_for_each_segment(bv, bio, iter) 424*e6ec361fSKent Overstreet __bch2_page_state_set(bv.bv_page, bv.bv_offset >> 9, 425*e6ec361fSKent Overstreet bv.bv_len >> 9, nr_ptrs, state); 426b44a66a6SKent Overstreet } 427b44a66a6SKent Overstreet 428e1036a2aSKent Overstreet static inline unsigned inode_nr_replicas(struct bch_fs *c, struct bch_inode_info *inode) 429e1036a2aSKent Overstreet { 430e1036a2aSKent Overstreet /* XXX: this should not be open coded */ 431e1036a2aSKent Overstreet return inode->ei_inode.bi_data_replicas 432e1036a2aSKent Overstreet ? inode->ei_inode.bi_data_replicas - 1 433e1036a2aSKent Overstreet : c->opts.data_replicas; 434e1036a2aSKent Overstreet } 435e1036a2aSKent Overstreet 436f57a6a5dSKent Overstreet static inline unsigned sectors_to_reserve(struct bch_page_sector *s, 437f57a6a5dSKent Overstreet unsigned nr_replicas) 438f57a6a5dSKent Overstreet { 439f57a6a5dSKent Overstreet return max(0, (int) nr_replicas - 440f57a6a5dSKent Overstreet s->nr_replicas - 441f57a6a5dSKent Overstreet s->replicas_reserved); 442f57a6a5dSKent Overstreet } 443f57a6a5dSKent Overstreet 444f57a6a5dSKent Overstreet static int bch2_get_page_disk_reservation(struct bch_fs *c, 445f57a6a5dSKent Overstreet struct bch_inode_info *inode, 4461c6fdbd8SKent Overstreet struct page *page, bool check_enospc) 4471c6fdbd8SKent Overstreet { 448f57a6a5dSKent Overstreet struct bch_page_state *s = bch2_page_state_create(page, 0); 449e1036a2aSKent Overstreet unsigned nr_replicas = inode_nr_replicas(c, inode); 450f57a6a5dSKent Overstreet struct disk_reservation disk_res = { 0 }; 451f57a6a5dSKent Overstreet unsigned i, disk_res_sectors = 0; 452f81b648dSKent Overstreet int ret; 4531c6fdbd8SKent Overstreet 454f57a6a5dSKent Overstreet if (!s) 455f57a6a5dSKent Overstreet return -ENOMEM; 4561c6fdbd8SKent Overstreet 457f57a6a5dSKent Overstreet for (i = 0; i < ARRAY_SIZE(s->s); i++) 458f57a6a5dSKent Overstreet disk_res_sectors += sectors_to_reserve(&s->s[i], nr_replicas); 459f57a6a5dSKent Overstreet 460f57a6a5dSKent Overstreet if (!disk_res_sectors) 461f57a6a5dSKent Overstreet return 0; 462f57a6a5dSKent Overstreet 463f57a6a5dSKent Overstreet ret = bch2_disk_reservation_get(c, &disk_res, 464f57a6a5dSKent Overstreet disk_res_sectors, 1, 465f57a6a5dSKent Overstreet !check_enospc 466f57a6a5dSKent Overstreet ? BCH_DISK_RESERVATION_NOFAIL 467f57a6a5dSKent Overstreet : 0); 4681c6fdbd8SKent Overstreet if (unlikely(ret)) 469f81b648dSKent Overstreet return ret; 470f81b648dSKent Overstreet 471f57a6a5dSKent Overstreet for (i = 0; i < ARRAY_SIZE(s->s); i++) 472f57a6a5dSKent Overstreet s->s[i].replicas_reserved += 473f57a6a5dSKent Overstreet sectors_to_reserve(&s->s[i], nr_replicas); 474f57a6a5dSKent Overstreet 475f57a6a5dSKent Overstreet return 0; 4761c6fdbd8SKent Overstreet } 4771c6fdbd8SKent Overstreet 478d1542e03SKent Overstreet struct bch2_page_reservation { 479d1542e03SKent Overstreet struct disk_reservation disk; 480d1542e03SKent Overstreet struct quota_res quota; 481d1542e03SKent Overstreet }; 482d1542e03SKent Overstreet 483d1542e03SKent Overstreet static void bch2_page_reservation_init(struct bch_fs *c, 484f57a6a5dSKent Overstreet struct bch_inode_info *inode, 485d1542e03SKent Overstreet struct bch2_page_reservation *res) 486d1542e03SKent Overstreet { 487d1542e03SKent Overstreet memset(res, 0, sizeof(*res)); 488d1542e03SKent Overstreet 489d1542e03SKent Overstreet res->disk.nr_replicas = inode_nr_replicas(c, inode); 490d1542e03SKent Overstreet } 491d1542e03SKent Overstreet 492d1542e03SKent Overstreet static void bch2_page_reservation_put(struct bch_fs *c, 493d1542e03SKent Overstreet struct bch_inode_info *inode, 494d1542e03SKent Overstreet struct bch2_page_reservation *res) 495d1542e03SKent Overstreet { 496d1542e03SKent Overstreet bch2_disk_reservation_put(c, &res->disk); 497d1542e03SKent Overstreet bch2_quota_reservation_put(c, inode, &res->quota); 498d1542e03SKent Overstreet } 499d1542e03SKent Overstreet 500d1542e03SKent Overstreet static int bch2_page_reservation_get(struct bch_fs *c, 501d1542e03SKent Overstreet struct bch_inode_info *inode, struct page *page, 502d1542e03SKent Overstreet struct bch2_page_reservation *res, 503d1542e03SKent Overstreet unsigned offset, unsigned len, bool check_enospc) 504f57a6a5dSKent Overstreet { 505f57a6a5dSKent Overstreet struct bch_page_state *s = bch2_page_state_create(page, 0); 506d1542e03SKent Overstreet unsigned i, disk_sectors = 0, quota_sectors = 0; 507f57a6a5dSKent Overstreet int ret; 508f57a6a5dSKent Overstreet 509f57a6a5dSKent Overstreet if (!s) 510f57a6a5dSKent Overstreet return -ENOMEM; 511f57a6a5dSKent Overstreet 512*e6ec361fSKent Overstreet BUG_ON(!s->uptodate); 513*e6ec361fSKent Overstreet 5144b0a66d5SKent Overstreet for (i = round_down(offset, block_bytes(c)) >> 9; 5154b0a66d5SKent Overstreet i < round_up(offset + len, block_bytes(c)) >> 9; 516d1542e03SKent Overstreet i++) { 517d1542e03SKent Overstreet disk_sectors += sectors_to_reserve(&s->s[i], 518d1542e03SKent Overstreet res->disk.nr_replicas); 519d1542e03SKent Overstreet quota_sectors += s->s[i].state == SECTOR_UNALLOCATED; 5201c6fdbd8SKent Overstreet } 5211c6fdbd8SKent Overstreet 522d1542e03SKent Overstreet if (disk_sectors) { 523d1542e03SKent Overstreet ret = bch2_disk_reservation_add(c, &res->disk, 524d1542e03SKent Overstreet disk_sectors, 525d1542e03SKent Overstreet !check_enospc 526d1542e03SKent Overstreet ? BCH_DISK_RESERVATION_NOFAIL 527d1542e03SKent Overstreet : 0); 528d1542e03SKent Overstreet if (unlikely(ret)) 529d1542e03SKent Overstreet return ret; 530d1542e03SKent Overstreet } 531d1542e03SKent Overstreet 532d1542e03SKent Overstreet if (quota_sectors) { 533d1542e03SKent Overstreet ret = bch2_quota_reservation_add(c, inode, &res->quota, 534d1542e03SKent Overstreet quota_sectors, 535d1542e03SKent Overstreet check_enospc); 536d1542e03SKent Overstreet if (unlikely(ret)) { 537d1542e03SKent Overstreet struct disk_reservation tmp = { 538d1542e03SKent Overstreet .sectors = disk_sectors 539d1542e03SKent Overstreet }; 540d1542e03SKent Overstreet 541d1542e03SKent Overstreet bch2_disk_reservation_put(c, &tmp); 542d1542e03SKent Overstreet res->disk.sectors -= disk_sectors; 543d1542e03SKent Overstreet return ret; 544d1542e03SKent Overstreet } 545d1542e03SKent Overstreet } 546d1542e03SKent Overstreet 547d1542e03SKent Overstreet return 0; 548f57a6a5dSKent Overstreet } 549f57a6a5dSKent Overstreet 5501c6fdbd8SKent Overstreet static void bch2_clear_page_bits(struct page *page) 5511c6fdbd8SKent Overstreet { 5521c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(page->mapping->host); 5531c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 554f57a6a5dSKent Overstreet struct bch_page_state *s = bch2_page_state(page); 555d1542e03SKent Overstreet struct disk_reservation disk_res = { 0 }; 556f57a6a5dSKent Overstreet int i, dirty_sectors = 0; 5571c6fdbd8SKent Overstreet 558f57a6a5dSKent Overstreet if (!s) 5591c6fdbd8SKent Overstreet return; 5601c6fdbd8SKent Overstreet 5613826ee0bSKent Overstreet EBUG_ON(!PageLocked(page)); 5623826ee0bSKent Overstreet EBUG_ON(PageWriteback(page)); 5633826ee0bSKent Overstreet 564f57a6a5dSKent Overstreet for (i = 0; i < ARRAY_SIZE(s->s); i++) { 565d1542e03SKent Overstreet disk_res.sectors += s->s[i].replicas_reserved; 566d1542e03SKent Overstreet s->s[i].replicas_reserved = 0; 567d1542e03SKent Overstreet 568b44a66a6SKent Overstreet switch (s->s[i].state) { 569b44a66a6SKent Overstreet case SECTOR_DIRTY: 570f57a6a5dSKent Overstreet s->s[i].state = SECTOR_UNALLOCATED; 571b44a66a6SKent Overstreet --dirty_sectors; 572b44a66a6SKent Overstreet break; 573b44a66a6SKent Overstreet case SECTOR_DIRTY_RESERVED: 574b44a66a6SKent Overstreet s->s[i].state = SECTOR_RESERVED; 575b44a66a6SKent Overstreet break; 576b44a66a6SKent Overstreet default: 577b44a66a6SKent Overstreet break; 578f57a6a5dSKent Overstreet } 579f57a6a5dSKent Overstreet } 580adfcfaf0SKent Overstreet 581d1542e03SKent Overstreet bch2_disk_reservation_put(c, &disk_res); 582d1542e03SKent Overstreet 583f57a6a5dSKent Overstreet if (dirty_sectors) 584b44a66a6SKent Overstreet i_sectors_acct(c, inode, NULL, dirty_sectors); 585adfcfaf0SKent Overstreet 586f57a6a5dSKent Overstreet bch2_page_state_release(page); 5871c6fdbd8SKent Overstreet } 5881c6fdbd8SKent Overstreet 589d1542e03SKent Overstreet static void bch2_set_page_dirty(struct bch_fs *c, 590d1542e03SKent Overstreet struct bch_inode_info *inode, struct page *page, 591d1542e03SKent Overstreet struct bch2_page_reservation *res, 592d1542e03SKent Overstreet unsigned offset, unsigned len) 5931c6fdbd8SKent Overstreet { 594d1542e03SKent Overstreet struct bch_page_state *s = bch2_page_state(page); 595f57a6a5dSKent Overstreet unsigned i, dirty_sectors = 0; 5961c6fdbd8SKent Overstreet 597877dfb34SKent Overstreet WARN_ON((u64) page_offset(page) + offset + len > 598877dfb34SKent Overstreet round_up((u64) i_size_read(&inode->v), block_bytes(c))); 599fb472ac5SKent Overstreet 6003826ee0bSKent Overstreet spin_lock(&s->lock); 6013826ee0bSKent Overstreet 6024b0a66d5SKent Overstreet for (i = round_down(offset, block_bytes(c)) >> 9; 6034b0a66d5SKent Overstreet i < round_up(offset + len, block_bytes(c)) >> 9; 604d1542e03SKent Overstreet i++) { 605d1542e03SKent Overstreet unsigned sectors = sectors_to_reserve(&s->s[i], 606d1542e03SKent Overstreet res->disk.nr_replicas); 6071c6fdbd8SKent Overstreet 608406d6d5aSKent Overstreet /* 609406d6d5aSKent Overstreet * This can happen if we race with the error path in 610406d6d5aSKent Overstreet * bch2_writepage_io_done(): 611406d6d5aSKent Overstreet */ 612406d6d5aSKent Overstreet sectors = min_t(unsigned, sectors, res->disk.sectors); 613406d6d5aSKent Overstreet 614d1542e03SKent Overstreet s->s[i].replicas_reserved += sectors; 615d1542e03SKent Overstreet res->disk.sectors -= sectors; 616adfcfaf0SKent Overstreet 617b44a66a6SKent Overstreet switch (s->s[i].state) { 618b44a66a6SKent Overstreet case SECTOR_UNALLOCATED: 619b44a66a6SKent Overstreet s->s[i].state = SECTOR_DIRTY; 620f57a6a5dSKent Overstreet dirty_sectors++; 621b44a66a6SKent Overstreet break; 622b44a66a6SKent Overstreet case SECTOR_RESERVED: 623b44a66a6SKent Overstreet s->s[i].state = SECTOR_DIRTY_RESERVED; 624b44a66a6SKent Overstreet break; 625b44a66a6SKent Overstreet default: 626b44a66a6SKent Overstreet break; 627b44a66a6SKent Overstreet } 628f57a6a5dSKent Overstreet } 629f57a6a5dSKent Overstreet 6303826ee0bSKent Overstreet spin_unlock(&s->lock); 6313826ee0bSKent Overstreet 632f57a6a5dSKent Overstreet if (dirty_sectors) 633d1542e03SKent Overstreet i_sectors_acct(c, inode, &res->quota, dirty_sectors); 6341c6fdbd8SKent Overstreet 635d1542e03SKent Overstreet if (!PageDirty(page)) 636d1542e03SKent Overstreet filemap_dirty_folio(inode->v.i_mapping, page_folio(page)); 6371c6fdbd8SKent Overstreet } 6381c6fdbd8SKent Overstreet 6391c6fdbd8SKent Overstreet vm_fault_t bch2_page_fault(struct vm_fault *vmf) 6401c6fdbd8SKent Overstreet { 6411c6fdbd8SKent Overstreet struct file *file = vmf->vma->vm_file; 642eb8e6e9cSKent Overstreet struct address_space *mapping = file->f_mapping; 643eb8e6e9cSKent Overstreet struct address_space *fdm = faults_disabled_mapping(); 6441c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 6451c6fdbd8SKent Overstreet int ret; 6461c6fdbd8SKent Overstreet 647eb8e6e9cSKent Overstreet if (fdm == mapping) 648eb8e6e9cSKent Overstreet return VM_FAULT_SIGBUS; 649eb8e6e9cSKent Overstreet 650eb8e6e9cSKent Overstreet /* Lock ordering: */ 651eb8e6e9cSKent Overstreet if (fdm > mapping) { 652eb8e6e9cSKent Overstreet struct bch_inode_info *fdm_host = to_bch_ei(fdm->host); 653eb8e6e9cSKent Overstreet 654eb8e6e9cSKent Overstreet if (bch2_pagecache_add_tryget(&inode->ei_pagecache_lock)) 655eb8e6e9cSKent Overstreet goto got_lock; 656eb8e6e9cSKent Overstreet 657eb8e6e9cSKent Overstreet bch2_pagecache_block_put(&fdm_host->ei_pagecache_lock); 658eb8e6e9cSKent Overstreet 6591c6fdbd8SKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 660eb8e6e9cSKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 661eb8e6e9cSKent Overstreet 662eb8e6e9cSKent Overstreet bch2_pagecache_block_get(&fdm_host->ei_pagecache_lock); 663eb8e6e9cSKent Overstreet 664eb8e6e9cSKent Overstreet /* Signal that lock has been dropped: */ 665eb8e6e9cSKent Overstreet set_fdm_dropped_locks(); 666eb8e6e9cSKent Overstreet return VM_FAULT_SIGBUS; 667eb8e6e9cSKent Overstreet } 668eb8e6e9cSKent Overstreet 669eb8e6e9cSKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 670eb8e6e9cSKent Overstreet got_lock: 6711c6fdbd8SKent Overstreet ret = filemap_fault(vmf); 6721c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 6731c6fdbd8SKent Overstreet 6741c6fdbd8SKent Overstreet return ret; 6751c6fdbd8SKent Overstreet } 6761c6fdbd8SKent Overstreet 6771c6fdbd8SKent Overstreet vm_fault_t bch2_page_mkwrite(struct vm_fault *vmf) 6781c6fdbd8SKent Overstreet { 6791c6fdbd8SKent Overstreet struct page *page = vmf->page; 6801c6fdbd8SKent Overstreet struct file *file = vmf->vma->vm_file; 6811c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 6821c6fdbd8SKent Overstreet struct address_space *mapping = file->f_mapping; 6831c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 684d1542e03SKent Overstreet struct bch2_page_reservation res; 6856cc3535dSKent Overstreet unsigned len; 6866cc3535dSKent Overstreet loff_t isize; 687*e6ec361fSKent Overstreet int ret; 6881c6fdbd8SKent Overstreet 689d1542e03SKent Overstreet bch2_page_reservation_init(c, inode, &res); 690d1542e03SKent Overstreet 6911c6fdbd8SKent Overstreet sb_start_pagefault(inode->v.i_sb); 6921c6fdbd8SKent Overstreet file_update_time(file); 6931c6fdbd8SKent Overstreet 6941c6fdbd8SKent Overstreet /* 6951c6fdbd8SKent Overstreet * Not strictly necessary, but helps avoid dio writes livelocking in 6961c6fdbd8SKent Overstreet * write_invalidate_inode_pages_range() - can drop this if/when we get 6971c6fdbd8SKent Overstreet * a write_invalidate_inode_pages_range() that works without dropping 6981c6fdbd8SKent Overstreet * page lock before invalidating page 6991c6fdbd8SKent Overstreet */ 7001c6fdbd8SKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 7011c6fdbd8SKent Overstreet 7021c6fdbd8SKent Overstreet lock_page(page); 7036cc3535dSKent Overstreet isize = i_size_read(&inode->v); 7046cc3535dSKent Overstreet 7056cc3535dSKent Overstreet if (page->mapping != mapping || page_offset(page) >= isize) { 7061c6fdbd8SKent Overstreet unlock_page(page); 7071c6fdbd8SKent Overstreet ret = VM_FAULT_NOPAGE; 7081c6fdbd8SKent Overstreet goto out; 7091c6fdbd8SKent Overstreet } 7101c6fdbd8SKent Overstreet 711d55460bbSKent Overstreet len = min_t(loff_t, PAGE_SIZE, isize - page_offset(page)); 7126cc3535dSKent Overstreet 713*e6ec361fSKent Overstreet if (!bch2_page_state_create(page, __GFP_NOFAIL)->uptodate) { 714*e6ec361fSKent Overstreet if (bch2_page_state_set(c, inode_inum(inode), &page, 1)) { 715*e6ec361fSKent Overstreet unlock_page(page); 716*e6ec361fSKent Overstreet ret = VM_FAULT_SIGBUS; 717*e6ec361fSKent Overstreet goto out; 718*e6ec361fSKent Overstreet } 719*e6ec361fSKent Overstreet } 720*e6ec361fSKent Overstreet 7216cc3535dSKent Overstreet if (bch2_page_reservation_get(c, inode, page, &res, 0, len, true)) { 7221c6fdbd8SKent Overstreet unlock_page(page); 7231c6fdbd8SKent Overstreet ret = VM_FAULT_SIGBUS; 7241c6fdbd8SKent Overstreet goto out; 7251c6fdbd8SKent Overstreet } 7261c6fdbd8SKent Overstreet 7276cc3535dSKent Overstreet bch2_set_page_dirty(c, inode, page, &res, 0, len); 7281b783a69SKent Overstreet bch2_page_reservation_put(c, inode, &res); 7291b783a69SKent Overstreet 7301c6fdbd8SKent Overstreet wait_for_stable_page(page); 731*e6ec361fSKent Overstreet ret = VM_FAULT_LOCKED; 7321c6fdbd8SKent Overstreet out: 7331c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 7341c6fdbd8SKent Overstreet sb_end_pagefault(inode->v.i_sb); 735d1542e03SKent Overstreet 7361c6fdbd8SKent Overstreet return ret; 7371c6fdbd8SKent Overstreet } 7381c6fdbd8SKent Overstreet 7391c6fdbd8SKent Overstreet void bch2_invalidate_folio(struct folio *folio, size_t offset, size_t length) 7401c6fdbd8SKent Overstreet { 7411c6fdbd8SKent Overstreet if (offset || length < folio_size(folio)) 7421c6fdbd8SKent Overstreet return; 7431c6fdbd8SKent Overstreet 7441c6fdbd8SKent Overstreet bch2_clear_page_bits(&folio->page); 7451c6fdbd8SKent Overstreet } 7461c6fdbd8SKent Overstreet 7471c6fdbd8SKent Overstreet bool bch2_release_folio(struct folio *folio, gfp_t gfp_mask) 7481c6fdbd8SKent Overstreet { 749a6d90385SKent Overstreet if (folio_test_dirty(folio) || folio_test_writeback(folio)) 7501c6fdbd8SKent Overstreet return false; 7511c6fdbd8SKent Overstreet 7521c6fdbd8SKent Overstreet bch2_clear_page_bits(&folio->page); 7531c6fdbd8SKent Overstreet return true; 7541c6fdbd8SKent Overstreet } 7551c6fdbd8SKent Overstreet 7561c6fdbd8SKent Overstreet /* readpage(s): */ 7571c6fdbd8SKent Overstreet 7581c6fdbd8SKent Overstreet static void bch2_readpages_end_io(struct bio *bio) 7591c6fdbd8SKent Overstreet { 7601c6fdbd8SKent Overstreet struct bvec_iter_all iter; 7611c6fdbd8SKent Overstreet struct bio_vec *bv; 7621c6fdbd8SKent Overstreet 7631c6fdbd8SKent Overstreet bio_for_each_segment_all(bv, bio, iter) { 7641c6fdbd8SKent Overstreet struct page *page = bv->bv_page; 7651c6fdbd8SKent Overstreet 7661c6fdbd8SKent Overstreet if (!bio->bi_status) { 7671c6fdbd8SKent Overstreet SetPageUptodate(page); 7681c6fdbd8SKent Overstreet } else { 7691c6fdbd8SKent Overstreet ClearPageUptodate(page); 7701c6fdbd8SKent Overstreet SetPageError(page); 7711c6fdbd8SKent Overstreet } 7721c6fdbd8SKent Overstreet unlock_page(page); 7731c6fdbd8SKent Overstreet } 7741c6fdbd8SKent Overstreet 7751c6fdbd8SKent Overstreet bio_put(bio); 7761c6fdbd8SKent Overstreet } 7771c6fdbd8SKent Overstreet 7781c6fdbd8SKent Overstreet struct readpages_iter { 7791c6fdbd8SKent Overstreet struct address_space *mapping; 7801c6fdbd8SKent Overstreet struct page **pages; 7811c6fdbd8SKent Overstreet unsigned nr_pages; 7821c6fdbd8SKent Overstreet unsigned idx; 7831c6fdbd8SKent Overstreet pgoff_t offset; 7841c6fdbd8SKent Overstreet }; 7851c6fdbd8SKent Overstreet 7861c6fdbd8SKent Overstreet static int readpages_iter_init(struct readpages_iter *iter, 7871c6fdbd8SKent Overstreet struct readahead_control *ractl) 7881c6fdbd8SKent Overstreet { 7891c6fdbd8SKent Overstreet unsigned i, nr_pages = readahead_count(ractl); 7901c6fdbd8SKent Overstreet 7911c6fdbd8SKent Overstreet memset(iter, 0, sizeof(*iter)); 7921c6fdbd8SKent Overstreet 7931c6fdbd8SKent Overstreet iter->mapping = ractl->mapping; 7941c6fdbd8SKent Overstreet iter->offset = readahead_index(ractl); 7951c6fdbd8SKent Overstreet iter->nr_pages = nr_pages; 7961c6fdbd8SKent Overstreet 7971c6fdbd8SKent Overstreet iter->pages = kmalloc_array(nr_pages, sizeof(struct page *), GFP_NOFS); 7981c6fdbd8SKent Overstreet if (!iter->pages) 7991c6fdbd8SKent Overstreet return -ENOMEM; 8001c6fdbd8SKent Overstreet 80189931472SKent Overstreet nr_pages = __readahead_batch(ractl, iter->pages, nr_pages); 8021c6fdbd8SKent Overstreet for (i = 0; i < nr_pages; i++) { 803f57a6a5dSKent Overstreet __bch2_page_state_create(iter->pages[i], __GFP_NOFAIL); 8041c6fdbd8SKent Overstreet put_page(iter->pages[i]); 8051c6fdbd8SKent Overstreet } 8061c6fdbd8SKent Overstreet 8071c6fdbd8SKent Overstreet return 0; 8081c6fdbd8SKent Overstreet } 8091c6fdbd8SKent Overstreet 8101c6fdbd8SKent Overstreet static inline struct page *readpage_iter_next(struct readpages_iter *iter) 8111c6fdbd8SKent Overstreet { 8121c6fdbd8SKent Overstreet if (iter->idx >= iter->nr_pages) 8131c6fdbd8SKent Overstreet return NULL; 8141c6fdbd8SKent Overstreet 8151c6fdbd8SKent Overstreet EBUG_ON(iter->pages[iter->idx]->index != iter->offset + iter->idx); 8161c6fdbd8SKent Overstreet 8171c6fdbd8SKent Overstreet return iter->pages[iter->idx]; 8181c6fdbd8SKent Overstreet } 8191c6fdbd8SKent Overstreet 82035189e09SKent Overstreet static bool extent_partial_reads_expensive(struct bkey_s_c k) 82135189e09SKent Overstreet { 82235189e09SKent Overstreet struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k); 82335189e09SKent Overstreet struct bch_extent_crc_unpacked crc; 82435189e09SKent Overstreet const union bch_extent_entry *i; 82535189e09SKent Overstreet 82635189e09SKent Overstreet bkey_for_each_crc(k.k, ptrs, crc, i) 82735189e09SKent Overstreet if (crc.csum_type || crc.compression_type) 82835189e09SKent Overstreet return true; 82935189e09SKent Overstreet return false; 83035189e09SKent Overstreet } 83135189e09SKent Overstreet 8321c6fdbd8SKent Overstreet static void readpage_bio_extend(struct readpages_iter *iter, 83376426098SKent Overstreet struct bio *bio, 83476426098SKent Overstreet unsigned sectors_this_extent, 8351c6fdbd8SKent Overstreet bool get_more) 8361c6fdbd8SKent Overstreet { 83776426098SKent Overstreet while (bio_sectors(bio) < sectors_this_extent && 8381c6fdbd8SKent Overstreet bio->bi_vcnt < bio->bi_max_vecs) { 8397279c1a2SKent Overstreet pgoff_t page_offset = bio_end_sector(bio) >> PAGE_SECTORS_SHIFT; 8401c6fdbd8SKent Overstreet struct page *page = readpage_iter_next(iter); 8411c6fdbd8SKent Overstreet int ret; 8421c6fdbd8SKent Overstreet 8431c6fdbd8SKent Overstreet if (page) { 8441c6fdbd8SKent Overstreet if (iter->offset + iter->idx != page_offset) 8451c6fdbd8SKent Overstreet break; 8461c6fdbd8SKent Overstreet 8471c6fdbd8SKent Overstreet iter->idx++; 8481c6fdbd8SKent Overstreet } else { 8491c6fdbd8SKent Overstreet if (!get_more) 8501c6fdbd8SKent Overstreet break; 8511c6fdbd8SKent Overstreet 8521c6fdbd8SKent Overstreet page = xa_load(&iter->mapping->i_pages, page_offset); 8531c6fdbd8SKent Overstreet if (page && !xa_is_value(page)) 8541c6fdbd8SKent Overstreet break; 8551c6fdbd8SKent Overstreet 8561c6fdbd8SKent Overstreet page = __page_cache_alloc(readahead_gfp_mask(iter->mapping)); 8571c6fdbd8SKent Overstreet if (!page) 8581c6fdbd8SKent Overstreet break; 8591c6fdbd8SKent Overstreet 860f57a6a5dSKent Overstreet if (!__bch2_page_state_create(page, 0)) { 861f57a6a5dSKent Overstreet put_page(page); 862f57a6a5dSKent Overstreet break; 863f57a6a5dSKent Overstreet } 8641c6fdbd8SKent Overstreet 8651c6fdbd8SKent Overstreet ret = add_to_page_cache_lru(page, iter->mapping, 8661c6fdbd8SKent Overstreet page_offset, GFP_NOFS); 8671c6fdbd8SKent Overstreet if (ret) { 868f57a6a5dSKent Overstreet __bch2_page_state_release(page); 8691c6fdbd8SKent Overstreet put_page(page); 8701c6fdbd8SKent Overstreet break; 8711c6fdbd8SKent Overstreet } 8721c6fdbd8SKent Overstreet 8731c6fdbd8SKent Overstreet put_page(page); 8741c6fdbd8SKent Overstreet } 8751c6fdbd8SKent Overstreet 876885678f6SKent Overstreet BUG_ON(!bio_add_page(bio, page, PAGE_SIZE, 0)); 8771c6fdbd8SKent Overstreet } 8781c6fdbd8SKent Overstreet } 8791c6fdbd8SKent Overstreet 8808c6d298aSKent Overstreet static void bchfs_read(struct btree_trans *trans, 8818c6d298aSKent Overstreet struct bch_read_bio *rbio, 8828c6d298aSKent Overstreet subvol_inum inum, 8831c6fdbd8SKent Overstreet struct readpages_iter *readpages_iter) 8841c6fdbd8SKent Overstreet { 8850f238367SKent Overstreet struct bch_fs *c = trans->c; 8868c6d298aSKent Overstreet struct btree_iter iter; 88707a1006aSKent Overstreet struct bkey_buf sk; 8881c6fdbd8SKent Overstreet int flags = BCH_READ_RETRY_IF_STALE| 8891c6fdbd8SKent Overstreet BCH_READ_MAY_PROMOTE; 8908c6d298aSKent Overstreet u32 snapshot; 89176426098SKent Overstreet int ret = 0; 8921c6fdbd8SKent Overstreet 8931c6fdbd8SKent Overstreet rbio->c = c; 8941c6fdbd8SKent Overstreet rbio->start_time = local_clock(); 8958c6d298aSKent Overstreet rbio->subvol = inum.subvol; 89635189e09SKent Overstreet 89707a1006aSKent Overstreet bch2_bkey_buf_init(&sk); 89876426098SKent Overstreet retry: 899700c25b3SKent Overstreet bch2_trans_begin(trans); 9008c6d298aSKent Overstreet iter = (struct btree_iter) { NULL }; 901700c25b3SKent Overstreet 9028c6d298aSKent Overstreet ret = bch2_subvolume_get_snapshot(trans, inum.subvol, &snapshot); 9038c6d298aSKent Overstreet if (ret) 9048c6d298aSKent Overstreet goto err; 9058c6d298aSKent Overstreet 9068c6d298aSKent Overstreet bch2_trans_iter_init(trans, &iter, BTREE_ID_extents, 9078c6d298aSKent Overstreet SPOS(inum.inum, rbio->bio.bi_iter.bi_sector, snapshot), 9088c6d298aSKent Overstreet BTREE_ITER_SLOTS|BTREE_ITER_FILTER_SNAPSHOTS); 9091c6fdbd8SKent Overstreet while (1) { 9101c6fdbd8SKent Overstreet struct bkey_s_c k; 91176426098SKent Overstreet unsigned bytes, sectors, offset_into_extent; 9125ff75ccbSKent Overstreet enum btree_id data_btree = BTREE_ID_extents; 9131c6fdbd8SKent Overstreet 9143737e0ddSKent Overstreet /* 9153737e0ddSKent Overstreet * read_extent -> io_time_reset may cause a transaction restart 9163737e0ddSKent Overstreet * without returning an error, we need to check for that here: 9173737e0ddSKent Overstreet */ 9183737e0ddSKent Overstreet if (!bch2_trans_relock(trans)) { 9193737e0ddSKent Overstreet ret = -EINTR; 9203737e0ddSKent Overstreet break; 9213737e0ddSKent Overstreet } 9223737e0ddSKent Overstreet 9238c6d298aSKent Overstreet bch2_btree_iter_set_pos(&iter, 9248c6d298aSKent Overstreet POS(inum.inum, rbio->bio.bi_iter.bi_sector)); 9251c6fdbd8SKent Overstreet 9268c6d298aSKent Overstreet k = bch2_btree_iter_peek_slot(&iter); 92776426098SKent Overstreet ret = bkey_err(k); 92876426098SKent Overstreet if (ret) 92976426098SKent Overstreet break; 9301c6fdbd8SKent Overstreet 9318c6d298aSKent Overstreet offset_into_extent = iter.pos.offset - 93206ed8558SKent Overstreet bkey_start_offset(k.k); 93376426098SKent Overstreet sectors = k.k->size - offset_into_extent; 93476426098SKent Overstreet 93507a1006aSKent Overstreet bch2_bkey_buf_reassemble(&sk, c, k); 93613dcd4abSKent Overstreet 9375ff75ccbSKent Overstreet ret = bch2_read_indirect_extent(trans, &data_btree, 93822d8a33dSYuxuan Shui &offset_into_extent, &sk); 93976426098SKent Overstreet if (ret) 94076426098SKent Overstreet break; 94176426098SKent Overstreet 94213dcd4abSKent Overstreet k = bkey_i_to_s_c(sk.k); 94313dcd4abSKent Overstreet 94476426098SKent Overstreet sectors = min(sectors, k.k->size - offset_into_extent); 94576426098SKent Overstreet 94676426098SKent Overstreet bch2_trans_unlock(trans); 94706ed8558SKent Overstreet 94835189e09SKent Overstreet if (readpages_iter) 94935189e09SKent Overstreet readpage_bio_extend(readpages_iter, &rbio->bio, sectors, 95035189e09SKent Overstreet extent_partial_reads_expensive(k)); 9511c6fdbd8SKent Overstreet 95276426098SKent Overstreet bytes = min(sectors, bio_sectors(&rbio->bio)) << 9; 95306ed8558SKent Overstreet swap(rbio->bio.bi_iter.bi_size, bytes); 9541c6fdbd8SKent Overstreet 95506ed8558SKent Overstreet if (rbio->bio.bi_iter.bi_size == bytes) 9561c6fdbd8SKent Overstreet flags |= BCH_READ_LAST_FRAGMENT; 9571c6fdbd8SKent Overstreet 958b44a66a6SKent Overstreet bch2_bio_page_state_set(&rbio->bio, k); 9591c6fdbd8SKent Overstreet 9608c6d298aSKent Overstreet bch2_read_extent(trans, rbio, iter.pos, 9615ff75ccbSKent Overstreet data_btree, k, offset_into_extent, flags); 9621c6fdbd8SKent Overstreet 9631c6fdbd8SKent Overstreet if (flags & BCH_READ_LAST_FRAGMENT) 96435189e09SKent Overstreet break; 9651c6fdbd8SKent Overstreet 96606ed8558SKent Overstreet swap(rbio->bio.bi_iter.bi_size, bytes); 96706ed8558SKent Overstreet bio_advance(&rbio->bio, bytes); 968084d42bbSKent Overstreet 969084d42bbSKent Overstreet ret = btree_trans_too_many_iters(trans); 970084d42bbSKent Overstreet if (ret) 971084d42bbSKent Overstreet break; 9721c6fdbd8SKent Overstreet } 9738c6d298aSKent Overstreet err: 9748c6d298aSKent Overstreet bch2_trans_iter_exit(trans, &iter); 97576426098SKent Overstreet 97676426098SKent Overstreet if (ret == -EINTR) 97776426098SKent Overstreet goto retry; 97876426098SKent Overstreet 97935189e09SKent Overstreet if (ret) { 9808c6d298aSKent Overstreet bch_err_inum_ratelimited(c, inum.inum, 9810fefe8d8SKent Overstreet "read error %i from btree lookup", ret); 9820fefe8d8SKent Overstreet rbio->bio.bi_status = BLK_STS_IOERR; 98376426098SKent Overstreet bio_endio(&rbio->bio); 9841c6fdbd8SKent Overstreet } 9851c6fdbd8SKent Overstreet 98607a1006aSKent Overstreet bch2_bkey_buf_exit(&sk, c); 98735189e09SKent Overstreet } 98835189e09SKent Overstreet 9891c6fdbd8SKent Overstreet void bch2_readahead(struct readahead_control *ractl) 9901c6fdbd8SKent Overstreet { 9911c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(ractl->mapping->host); 9921c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 9939a3df993SKent Overstreet struct bch_io_opts opts = io_opts(c, &inode->ei_inode); 994424eb881SKent Overstreet struct btree_trans trans; 9951c6fdbd8SKent Overstreet struct page *page; 9961c6fdbd8SKent Overstreet struct readpages_iter readpages_iter; 9971c6fdbd8SKent Overstreet int ret; 9981c6fdbd8SKent Overstreet 9991c6fdbd8SKent Overstreet ret = readpages_iter_init(&readpages_iter, ractl); 10001c6fdbd8SKent Overstreet BUG_ON(ret); 10011c6fdbd8SKent Overstreet 100220bceecbSKent Overstreet bch2_trans_init(&trans, c, 0, 0); 10031c6fdbd8SKent Overstreet 10041c6fdbd8SKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 10051c6fdbd8SKent Overstreet 10061c6fdbd8SKent Overstreet while ((page = readpage_iter_next(&readpages_iter))) { 10071c6fdbd8SKent Overstreet pgoff_t index = readpages_iter.offset + readpages_iter.idx; 10081c6fdbd8SKent Overstreet unsigned n = min_t(unsigned, 10091c6fdbd8SKent Overstreet readpages_iter.nr_pages - 10101c6fdbd8SKent Overstreet readpages_iter.idx, 10111c6fdbd8SKent Overstreet BIO_MAX_VECS); 10121c6fdbd8SKent Overstreet struct bch_read_bio *rbio = 10131c6fdbd8SKent Overstreet rbio_init(bio_alloc_bioset(NULL, n, REQ_OP_READ, 10141c6fdbd8SKent Overstreet GFP_NOFS, &c->bio_read), 10151c6fdbd8SKent Overstreet opts); 10161c6fdbd8SKent Overstreet 10171c6fdbd8SKent Overstreet readpages_iter.idx++; 10181c6fdbd8SKent Overstreet 10197279c1a2SKent Overstreet rbio->bio.bi_iter.bi_sector = (sector_t) index << PAGE_SECTORS_SHIFT; 10201c6fdbd8SKent Overstreet rbio->bio.bi_end_io = bch2_readpages_end_io; 1021885678f6SKent Overstreet BUG_ON(!bio_add_page(&rbio->bio, page, PAGE_SIZE, 0)); 10221c6fdbd8SKent Overstreet 10238c6d298aSKent Overstreet bchfs_read(&trans, rbio, inode_inum(inode), 10240f238367SKent Overstreet &readpages_iter); 10251c6fdbd8SKent Overstreet } 10261c6fdbd8SKent Overstreet 10271c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 1028424eb881SKent Overstreet 1029424eb881SKent Overstreet bch2_trans_exit(&trans); 10301c6fdbd8SKent Overstreet kfree(readpages_iter.pages); 10311c6fdbd8SKent Overstreet } 10321c6fdbd8SKent Overstreet 10331c6fdbd8SKent Overstreet static void __bchfs_readpage(struct bch_fs *c, struct bch_read_bio *rbio, 10348c6d298aSKent Overstreet subvol_inum inum, struct page *page) 10351c6fdbd8SKent Overstreet { 1036424eb881SKent Overstreet struct btree_trans trans; 10371c6fdbd8SKent Overstreet 1038f57a6a5dSKent Overstreet bch2_page_state_create(page, __GFP_NOFAIL); 10391c6fdbd8SKent Overstreet 10401c6fdbd8SKent Overstreet rbio->bio.bi_opf = REQ_OP_READ|REQ_SYNC; 10417f5e31e1SKent Overstreet rbio->bio.bi_iter.bi_sector = 10427279c1a2SKent Overstreet (sector_t) page->index << PAGE_SECTORS_SHIFT; 10437f5e31e1SKent Overstreet BUG_ON(!bio_add_page(&rbio->bio, page, PAGE_SIZE, 0)); 10441c6fdbd8SKent Overstreet 104520bceecbSKent Overstreet bch2_trans_init(&trans, c, 0, 0); 10468c6d298aSKent Overstreet bchfs_read(&trans, rbio, inum, NULL); 1047424eb881SKent Overstreet bch2_trans_exit(&trans); 10481c6fdbd8SKent Overstreet } 10491c6fdbd8SKent Overstreet 10501c6fdbd8SKent Overstreet static void bch2_read_single_page_end_io(struct bio *bio) 10511c6fdbd8SKent Overstreet { 10521c6fdbd8SKent Overstreet complete(bio->bi_private); 10531c6fdbd8SKent Overstreet } 10541c6fdbd8SKent Overstreet 10551c6fdbd8SKent Overstreet static int bch2_read_single_page(struct page *page, 10561c6fdbd8SKent Overstreet struct address_space *mapping) 10571c6fdbd8SKent Overstreet { 10581c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(mapping->host); 10591c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 10601c6fdbd8SKent Overstreet struct bch_read_bio *rbio; 10611c6fdbd8SKent Overstreet int ret; 10621c6fdbd8SKent Overstreet DECLARE_COMPLETION_ONSTACK(done); 10631c6fdbd8SKent Overstreet 10641c6fdbd8SKent Overstreet rbio = rbio_init(bio_alloc_bioset(NULL, 1, REQ_OP_READ, GFP_NOFS, &c->bio_read), 10659a3df993SKent Overstreet io_opts(c, &inode->ei_inode)); 10661c6fdbd8SKent Overstreet rbio->bio.bi_private = &done; 10671c6fdbd8SKent Overstreet rbio->bio.bi_end_io = bch2_read_single_page_end_io; 10681c6fdbd8SKent Overstreet 10698c6d298aSKent Overstreet __bchfs_readpage(c, rbio, inode_inum(inode), page); 10701c6fdbd8SKent Overstreet wait_for_completion(&done); 10711c6fdbd8SKent Overstreet 10721c6fdbd8SKent Overstreet ret = blk_status_to_errno(rbio->bio.bi_status); 10731c6fdbd8SKent Overstreet bio_put(&rbio->bio); 10741c6fdbd8SKent Overstreet 10751c6fdbd8SKent Overstreet if (ret < 0) 10761c6fdbd8SKent Overstreet return ret; 10771c6fdbd8SKent Overstreet 10781c6fdbd8SKent Overstreet SetPageUptodate(page); 10791c6fdbd8SKent Overstreet return 0; 10801c6fdbd8SKent Overstreet } 10811c6fdbd8SKent Overstreet 10821c6fdbd8SKent Overstreet int bch2_read_folio(struct file *file, struct folio *folio) 10831c6fdbd8SKent Overstreet { 10841c6fdbd8SKent Overstreet struct page *page = &folio->page; 10851c6fdbd8SKent Overstreet int ret; 10861c6fdbd8SKent Overstreet 10871c6fdbd8SKent Overstreet ret = bch2_read_single_page(page, page->mapping); 10881c6fdbd8SKent Overstreet folio_unlock(folio); 10891c6fdbd8SKent Overstreet return ret; 10901c6fdbd8SKent Overstreet } 10911c6fdbd8SKent Overstreet 10921c6fdbd8SKent Overstreet /* writepages: */ 10931c6fdbd8SKent Overstreet 10941c6fdbd8SKent Overstreet struct bch_writepage_state { 10951c6fdbd8SKent Overstreet struct bch_writepage_io *io; 10961c6fdbd8SKent Overstreet struct bch_io_opts opts; 10971c6fdbd8SKent Overstreet }; 10981c6fdbd8SKent Overstreet 10991c6fdbd8SKent Overstreet static inline struct bch_writepage_state bch_writepage_state_init(struct bch_fs *c, 11001c6fdbd8SKent Overstreet struct bch_inode_info *inode) 11011c6fdbd8SKent Overstreet { 11029a3df993SKent Overstreet return (struct bch_writepage_state) { 11039a3df993SKent Overstreet .opts = io_opts(c, &inode->ei_inode) 11049a3df993SKent Overstreet }; 11051c6fdbd8SKent Overstreet } 11061c6fdbd8SKent Overstreet 11079f311f21SKent Overstreet static void bch2_writepage_io_done(struct bch_write_op *op) 11081c6fdbd8SKent Overstreet { 11099f311f21SKent Overstreet struct bch_writepage_io *io = 11109f311f21SKent Overstreet container_of(op, struct bch_writepage_io, op); 11119a3df993SKent Overstreet struct bch_fs *c = io->op.c; 11129a3df993SKent Overstreet struct bio *bio = &io->op.wbio.bio; 11131c6fdbd8SKent Overstreet struct bvec_iter_all iter; 11141c6fdbd8SKent Overstreet struct bio_vec *bvec; 1115b3fce09cSKent Overstreet unsigned i; 11161c6fdbd8SKent Overstreet 1117ef1b2092SKent Overstreet up(&io->op.c->io_in_flight); 1118ef1b2092SKent Overstreet 11199a3df993SKent Overstreet if (io->op.error) { 112033c74e41SKent Overstreet set_bit(EI_INODE_ERROR, &io->inode->ei_flags); 112133c74e41SKent Overstreet 112275812e70SKent Overstreet bio_for_each_segment_all(bvec, bio, iter) { 1123b3fce09cSKent Overstreet struct bch_page_state *s; 1124b3fce09cSKent Overstreet 11251c6fdbd8SKent Overstreet SetPageError(bvec->bv_page); 112675812e70SKent Overstreet mapping_set_error(bvec->bv_page->mapping, -EIO); 1127b3fce09cSKent Overstreet 11283826ee0bSKent Overstreet s = __bch2_page_state(bvec->bv_page); 11293826ee0bSKent Overstreet spin_lock(&s->lock); 1130b3fce09cSKent Overstreet for (i = 0; i < PAGE_SECTORS; i++) 1131b3fce09cSKent Overstreet s->s[i].nr_replicas = 0; 11323826ee0bSKent Overstreet spin_unlock(&s->lock); 113375812e70SKent Overstreet } 11341c6fdbd8SKent Overstreet } 11351c6fdbd8SKent Overstreet 11364be1a412SKent Overstreet if (io->op.flags & BCH_WRITE_WROTE_DATA_INLINE) { 11374be1a412SKent Overstreet bio_for_each_segment_all(bvec, bio, iter) { 11384be1a412SKent Overstreet struct bch_page_state *s; 11394be1a412SKent Overstreet 11404be1a412SKent Overstreet s = __bch2_page_state(bvec->bv_page); 11414be1a412SKent Overstreet spin_lock(&s->lock); 11424be1a412SKent Overstreet for (i = 0; i < PAGE_SECTORS; i++) 11434be1a412SKent Overstreet s->s[i].nr_replicas = 0; 11444be1a412SKent Overstreet spin_unlock(&s->lock); 11454be1a412SKent Overstreet } 11464be1a412SKent Overstreet } 11474be1a412SKent Overstreet 11481c6fdbd8SKent Overstreet /* 11491c6fdbd8SKent Overstreet * racing with fallocate can cause us to add fewer sectors than 11501c6fdbd8SKent Overstreet * expected - but we shouldn't add more sectors than expected: 11511c6fdbd8SKent Overstreet */ 11529a3df993SKent Overstreet BUG_ON(io->op.i_sectors_delta > 0); 11531c6fdbd8SKent Overstreet 11541c6fdbd8SKent Overstreet /* 11551c6fdbd8SKent Overstreet * (error (due to going RO) halfway through a page can screw that up 11561c6fdbd8SKent Overstreet * slightly) 11571c6fdbd8SKent Overstreet * XXX wtf? 11589a3df993SKent Overstreet BUG_ON(io->op.op.i_sectors_delta >= PAGE_SECTORS); 11591c6fdbd8SKent Overstreet */ 11601c6fdbd8SKent Overstreet 11611c6fdbd8SKent Overstreet /* 11621c6fdbd8SKent Overstreet * PageWriteback is effectively our ref on the inode - fixup i_blocks 11631c6fdbd8SKent Overstreet * before calling end_page_writeback: 11641c6fdbd8SKent Overstreet */ 11659a3df993SKent Overstreet i_sectors_acct(c, io->inode, NULL, io->op.i_sectors_delta); 11661c6fdbd8SKent Overstreet 11677f5e31e1SKent Overstreet bio_for_each_segment_all(bvec, bio, iter) { 11687f5e31e1SKent Overstreet struct bch_page_state *s = __bch2_page_state(bvec->bv_page); 11697f5e31e1SKent Overstreet 11707f5e31e1SKent Overstreet if (atomic_dec_and_test(&s->write_count)) 11711c6fdbd8SKent Overstreet end_page_writeback(bvec->bv_page); 11727f5e31e1SKent Overstreet } 11731c6fdbd8SKent Overstreet 11749f311f21SKent Overstreet bio_put(&io->op.wbio.bio); 11751c6fdbd8SKent Overstreet } 11761c6fdbd8SKent Overstreet 11771c6fdbd8SKent Overstreet static void bch2_writepage_do_io(struct bch_writepage_state *w) 11781c6fdbd8SKent Overstreet { 11791c6fdbd8SKent Overstreet struct bch_writepage_io *io = w->io; 11801c6fdbd8SKent Overstreet 1181ef1b2092SKent Overstreet down(&io->op.c->io_in_flight); 1182ef1b2092SKent Overstreet 11831c6fdbd8SKent Overstreet w->io = NULL; 11849f311f21SKent Overstreet closure_call(&io->op.cl, bch2_write, NULL, NULL); 11851c6fdbd8SKent Overstreet } 11861c6fdbd8SKent Overstreet 11871c6fdbd8SKent Overstreet /* 11881c6fdbd8SKent Overstreet * Get a bch_writepage_io and add @page to it - appending to an existing one if 11891c6fdbd8SKent Overstreet * possible, else allocating a new one: 11901c6fdbd8SKent Overstreet */ 11911c6fdbd8SKent Overstreet static void bch2_writepage_io_alloc(struct bch_fs *c, 119250fe5bd6SKent Overstreet struct writeback_control *wbc, 11931c6fdbd8SKent Overstreet struct bch_writepage_state *w, 11941c6fdbd8SKent Overstreet struct bch_inode_info *inode, 11957f5e31e1SKent Overstreet u64 sector, 11961c6fdbd8SKent Overstreet unsigned nr_replicas) 11971c6fdbd8SKent Overstreet { 11981c6fdbd8SKent Overstreet struct bch_write_op *op; 11991c6fdbd8SKent Overstreet 12001c6fdbd8SKent Overstreet w->io = container_of(bio_alloc_bioset(NULL, BIO_MAX_VECS, 12011c6fdbd8SKent Overstreet REQ_OP_WRITE, 12021c6fdbd8SKent Overstreet GFP_NOFS, 12031c6fdbd8SKent Overstreet &c->writepage_bioset), 12049a3df993SKent Overstreet struct bch_writepage_io, op.wbio.bio); 12051c6fdbd8SKent Overstreet 12069a3df993SKent Overstreet w->io->inode = inode; 12079a3df993SKent Overstreet op = &w->io->op; 12089a3df993SKent Overstreet bch2_write_op_init(op, c, w->opts); 12099a3df993SKent Overstreet op->target = w->opts.foreground_target; 12101c6fdbd8SKent Overstreet op->nr_replicas = nr_replicas; 12111c6fdbd8SKent Overstreet op->res.nr_replicas = nr_replicas; 12121c6fdbd8SKent Overstreet op->write_point = writepoint_hashed(inode->ei_last_dirtied); 12138c6d298aSKent Overstreet op->subvol = inode->ei_subvol; 12147f5e31e1SKent Overstreet op->pos = POS(inode->v.i_ino, sector); 12159f311f21SKent Overstreet op->end_io = bch2_writepage_io_done; 12167f5e31e1SKent Overstreet op->wbio.bio.bi_iter.bi_sector = sector; 121750fe5bd6SKent Overstreet op->wbio.bio.bi_opf = wbc_to_write_flags(wbc); 12181c6fdbd8SKent Overstreet } 12191c6fdbd8SKent Overstreet 12201c6fdbd8SKent Overstreet static int __bch2_writepage(struct folio *folio, 12211c6fdbd8SKent Overstreet struct writeback_control *wbc, 12221c6fdbd8SKent Overstreet void *data) 12231c6fdbd8SKent Overstreet { 12241c6fdbd8SKent Overstreet struct page *page = &folio->page; 12251c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(page->mapping->host); 12261c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 12271c6fdbd8SKent Overstreet struct bch_writepage_state *w = data; 12287f5e31e1SKent Overstreet struct bch_page_state *s, orig; 12297f5e31e1SKent Overstreet unsigned i, offset, nr_replicas_this_write = U32_MAX; 12301c6fdbd8SKent Overstreet loff_t i_size = i_size_read(&inode->v); 12311c6fdbd8SKent Overstreet pgoff_t end_index = i_size >> PAGE_SHIFT; 1232e1036a2aSKent Overstreet int ret; 12331c6fdbd8SKent Overstreet 12341c6fdbd8SKent Overstreet EBUG_ON(!PageUptodate(page)); 12351c6fdbd8SKent Overstreet 12361c6fdbd8SKent Overstreet /* Is the page fully inside i_size? */ 12371c6fdbd8SKent Overstreet if (page->index < end_index) 12381c6fdbd8SKent Overstreet goto do_io; 12391c6fdbd8SKent Overstreet 12401c6fdbd8SKent Overstreet /* Is the page fully outside i_size? (truncate in progress) */ 12411c6fdbd8SKent Overstreet offset = i_size & (PAGE_SIZE - 1); 12421c6fdbd8SKent Overstreet if (page->index > end_index || !offset) { 12431c6fdbd8SKent Overstreet unlock_page(page); 12441c6fdbd8SKent Overstreet return 0; 12451c6fdbd8SKent Overstreet } 12461c6fdbd8SKent Overstreet 12471c6fdbd8SKent Overstreet /* 12481c6fdbd8SKent Overstreet * The page straddles i_size. It must be zeroed out on each and every 12491c6fdbd8SKent Overstreet * writepage invocation because it may be mmapped. "A file is mapped 12501c6fdbd8SKent Overstreet * in multiples of the page size. For a file that is not a multiple of 12511c6fdbd8SKent Overstreet * the page size, the remaining memory is zeroed when mapped, and 12521c6fdbd8SKent Overstreet * writes to that region are not written out to the file." 12531c6fdbd8SKent Overstreet */ 12541c6fdbd8SKent Overstreet zero_user_segment(page, offset, PAGE_SIZE); 12551c6fdbd8SKent Overstreet do_io: 1256f57a6a5dSKent Overstreet s = bch2_page_state_create(page, __GFP_NOFAIL); 1257f81b648dSKent Overstreet 1258f74a5051SKent Overstreet /* 1259f74a5051SKent Overstreet * Things get really hairy with errors during writeback: 1260f74a5051SKent Overstreet */ 1261f74a5051SKent Overstreet ret = bch2_get_page_disk_reservation(c, inode, page, false); 1262f74a5051SKent Overstreet BUG_ON(ret); 1263e1036a2aSKent Overstreet 12647f5e31e1SKent Overstreet /* Before unlocking the page, get copy of reservations: */ 1265f74a5051SKent Overstreet spin_lock(&s->lock); 12667f5e31e1SKent Overstreet orig = *s; 1267f74a5051SKent Overstreet spin_unlock(&s->lock); 12687f5e31e1SKent Overstreet 12697f5e31e1SKent Overstreet for (i = 0; i < PAGE_SECTORS; i++) { 12702ba5d38bSKent Overstreet if (s->s[i].state < SECTOR_DIRTY) 12717f5e31e1SKent Overstreet continue; 12727f5e31e1SKent Overstreet 1273f81b648dSKent Overstreet nr_replicas_this_write = 1274f57a6a5dSKent Overstreet min_t(unsigned, nr_replicas_this_write, 1275f57a6a5dSKent Overstreet s->s[i].nr_replicas + 1276f57a6a5dSKent Overstreet s->s[i].replicas_reserved); 12777f5e31e1SKent Overstreet } 12781c6fdbd8SKent Overstreet 1279f57a6a5dSKent Overstreet for (i = 0; i < PAGE_SECTORS; i++) { 12802ba5d38bSKent Overstreet if (s->s[i].state < SECTOR_DIRTY) 12817f5e31e1SKent Overstreet continue; 12827f5e31e1SKent Overstreet 1283f57a6a5dSKent Overstreet s->s[i].nr_replicas = w->opts.compression 1284f57a6a5dSKent Overstreet ? 0 : nr_replicas_this_write; 1285e1036a2aSKent Overstreet 1286f57a6a5dSKent Overstreet s->s[i].replicas_reserved = 0; 1287f57a6a5dSKent Overstreet s->s[i].state = SECTOR_ALLOCATED; 1288f57a6a5dSKent Overstreet } 12891c6fdbd8SKent Overstreet 12907f5e31e1SKent Overstreet BUG_ON(atomic_read(&s->write_count)); 12917f5e31e1SKent Overstreet atomic_set(&s->write_count, 1); 12927f5e31e1SKent Overstreet 12931c6fdbd8SKent Overstreet BUG_ON(PageWriteback(page)); 12941c6fdbd8SKent Overstreet set_page_writeback(page); 12957f5e31e1SKent Overstreet 12961c6fdbd8SKent Overstreet unlock_page(page); 12971c6fdbd8SKent Overstreet 12987f5e31e1SKent Overstreet offset = 0; 12997f5e31e1SKent Overstreet while (1) { 1300f74a5051SKent Overstreet unsigned sectors = 0, dirty_sectors = 0, reserved_sectors = 0; 13017f5e31e1SKent Overstreet u64 sector; 13027f5e31e1SKent Overstreet 13037f5e31e1SKent Overstreet while (offset < PAGE_SECTORS && 13042ba5d38bSKent Overstreet orig.s[offset].state < SECTOR_DIRTY) 13057f5e31e1SKent Overstreet offset++; 13067f5e31e1SKent Overstreet 13077f5e31e1SKent Overstreet if (offset == PAGE_SECTORS) 13087f5e31e1SKent Overstreet break; 13097f5e31e1SKent Overstreet 13107f5e31e1SKent Overstreet while (offset + sectors < PAGE_SECTORS && 1311f74a5051SKent Overstreet orig.s[offset + sectors].state >= SECTOR_DIRTY) { 1312f74a5051SKent Overstreet reserved_sectors += orig.s[offset + sectors].replicas_reserved; 1313f74a5051SKent Overstreet dirty_sectors += orig.s[offset + sectors].state == SECTOR_DIRTY; 13147f5e31e1SKent Overstreet sectors++; 13157f5e31e1SKent Overstreet } 1316f74a5051SKent Overstreet BUG_ON(!sectors); 1317f74a5051SKent Overstreet 13187279c1a2SKent Overstreet sector = ((u64) page->index << PAGE_SECTORS_SHIFT) + offset; 13197f5e31e1SKent Overstreet 13201c6fdbd8SKent Overstreet if (w->io && 13219a3df993SKent Overstreet (w->io->op.res.nr_replicas != nr_replicas_this_write || 13229a3df993SKent Overstreet bio_full(&w->io->op.wbio.bio, PAGE_SIZE) || 1323f59b3464SKent Overstreet w->io->op.wbio.bio.bi_iter.bi_size + (sectors << 9) >= 1324f59b3464SKent Overstreet (BIO_MAX_VECS * PAGE_SIZE) || 13259a3df993SKent Overstreet bio_end_sector(&w->io->op.wbio.bio) != sector)) 13261c6fdbd8SKent Overstreet bch2_writepage_do_io(w); 13271c6fdbd8SKent Overstreet 13281c6fdbd8SKent Overstreet if (!w->io) 132950fe5bd6SKent Overstreet bch2_writepage_io_alloc(c, wbc, w, inode, sector, 1330f81b648dSKent Overstreet nr_replicas_this_write); 13311c6fdbd8SKent Overstreet 13327f5e31e1SKent Overstreet atomic_inc(&s->write_count); 13337f5e31e1SKent Overstreet 13349a3df993SKent Overstreet BUG_ON(inode != w->io->inode); 13359a3df993SKent Overstreet BUG_ON(!bio_add_page(&w->io->op.wbio.bio, page, 13367f5e31e1SKent Overstreet sectors << 9, offset << 9)); 13371c6fdbd8SKent Overstreet 13386cc3535dSKent Overstreet /* Check for writing past i_size: */ 13399a3df993SKent Overstreet WARN_ON((bio_end_sector(&w->io->op.wbio.bio) << 9) > 13406cc3535dSKent Overstreet round_up(i_size, block_bytes(c))); 13416cc3535dSKent Overstreet 13429a3df993SKent Overstreet w->io->op.res.sectors += reserved_sectors; 13439a3df993SKent Overstreet w->io->op.i_sectors_delta -= dirty_sectors; 13441c6fdbd8SKent Overstreet w->io->op.new_i_size = i_size; 13451c6fdbd8SKent Overstreet 13467f5e31e1SKent Overstreet offset += sectors; 13477f5e31e1SKent Overstreet } 13487f5e31e1SKent Overstreet 13497f5e31e1SKent Overstreet if (atomic_dec_and_test(&s->write_count)) 13507f5e31e1SKent Overstreet end_page_writeback(page); 13517f5e31e1SKent Overstreet 13521c6fdbd8SKent Overstreet return 0; 13531c6fdbd8SKent Overstreet } 13541c6fdbd8SKent Overstreet 13551c6fdbd8SKent Overstreet int bch2_writepages(struct address_space *mapping, struct writeback_control *wbc) 13561c6fdbd8SKent Overstreet { 13571c6fdbd8SKent Overstreet struct bch_fs *c = mapping->host->i_sb->s_fs_info; 13581c6fdbd8SKent Overstreet struct bch_writepage_state w = 13591c6fdbd8SKent Overstreet bch_writepage_state_init(c, to_bch_ei(mapping->host)); 13601c6fdbd8SKent Overstreet struct blk_plug plug; 13611c6fdbd8SKent Overstreet int ret; 13621c6fdbd8SKent Overstreet 13631c6fdbd8SKent Overstreet blk_start_plug(&plug); 13641c6fdbd8SKent Overstreet ret = write_cache_pages(mapping, wbc, __bch2_writepage, &w); 13651c6fdbd8SKent Overstreet if (w.io) 13661c6fdbd8SKent Overstreet bch2_writepage_do_io(&w); 13671c6fdbd8SKent Overstreet blk_finish_plug(&plug); 13681c6fdbd8SKent Overstreet return ret; 13691c6fdbd8SKent Overstreet } 13701c6fdbd8SKent Overstreet 13711c6fdbd8SKent Overstreet int bch2_writepage(struct page *page, struct writeback_control *wbc) 13721c6fdbd8SKent Overstreet { 13731c6fdbd8SKent Overstreet struct bch_fs *c = page->mapping->host->i_sb->s_fs_info; 13741c6fdbd8SKent Overstreet struct bch_writepage_state w = 13751c6fdbd8SKent Overstreet bch_writepage_state_init(c, to_bch_ei(page->mapping->host)); 13761c6fdbd8SKent Overstreet int ret; 13771c6fdbd8SKent Overstreet 13781c6fdbd8SKent Overstreet ret = __bch2_writepage(page_folio(page), wbc, &w); 13791c6fdbd8SKent Overstreet if (w.io) 13801c6fdbd8SKent Overstreet bch2_writepage_do_io(&w); 13811c6fdbd8SKent Overstreet 13821c6fdbd8SKent Overstreet return ret; 13831c6fdbd8SKent Overstreet } 13841c6fdbd8SKent Overstreet 13851c6fdbd8SKent Overstreet /* buffered writes: */ 13861c6fdbd8SKent Overstreet 13871c6fdbd8SKent Overstreet int bch2_write_begin(struct file *file, struct address_space *mapping, 13881c6fdbd8SKent Overstreet loff_t pos, unsigned len, 13891c6fdbd8SKent Overstreet struct page **pagep, void **fsdata) 13901c6fdbd8SKent Overstreet { 13911c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(mapping->host); 13921c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 1393d1542e03SKent Overstreet struct bch2_page_reservation *res; 13941c6fdbd8SKent Overstreet pgoff_t index = pos >> PAGE_SHIFT; 13951c6fdbd8SKent Overstreet unsigned offset = pos & (PAGE_SIZE - 1); 13961c6fdbd8SKent Overstreet struct page *page; 13971c6fdbd8SKent Overstreet int ret = -ENOMEM; 13981c6fdbd8SKent Overstreet 1399d1542e03SKent Overstreet res = kmalloc(sizeof(*res), GFP_KERNEL); 1400d1542e03SKent Overstreet if (!res) 1401d1542e03SKent Overstreet return -ENOMEM; 1402d1542e03SKent Overstreet 1403d1542e03SKent Overstreet bch2_page_reservation_init(c, inode, res); 1404d1542e03SKent Overstreet *fsdata = res; 14051c6fdbd8SKent Overstreet 14061c6fdbd8SKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 14071c6fdbd8SKent Overstreet 14081c6fdbd8SKent Overstreet page = grab_cache_page_write_begin(mapping, index); 14091c6fdbd8SKent Overstreet if (!page) 14101c6fdbd8SKent Overstreet goto err_unlock; 14111c6fdbd8SKent Overstreet 14121c6fdbd8SKent Overstreet if (PageUptodate(page)) 14131c6fdbd8SKent Overstreet goto out; 14141c6fdbd8SKent Overstreet 14151c6fdbd8SKent Overstreet /* If we're writing entire page, don't need to read it in first: */ 14161c6fdbd8SKent Overstreet if (len == PAGE_SIZE) 14171c6fdbd8SKent Overstreet goto out; 14181c6fdbd8SKent Overstreet 14191c6fdbd8SKent Overstreet if (!offset && pos + len >= inode->v.i_size) { 14201c6fdbd8SKent Overstreet zero_user_segment(page, len, PAGE_SIZE); 14211c6fdbd8SKent Overstreet flush_dcache_page(page); 14221c6fdbd8SKent Overstreet goto out; 14231c6fdbd8SKent Overstreet } 14241c6fdbd8SKent Overstreet 14251c6fdbd8SKent Overstreet if (index > inode->v.i_size >> PAGE_SHIFT) { 14261c6fdbd8SKent Overstreet zero_user_segments(page, 0, offset, offset + len, PAGE_SIZE); 14271c6fdbd8SKent Overstreet flush_dcache_page(page); 14281c6fdbd8SKent Overstreet goto out; 14291c6fdbd8SKent Overstreet } 14301c6fdbd8SKent Overstreet readpage: 14311c6fdbd8SKent Overstreet ret = bch2_read_single_page(page, mapping); 14321c6fdbd8SKent Overstreet if (ret) 14331c6fdbd8SKent Overstreet goto err; 14341c6fdbd8SKent Overstreet out: 1435*e6ec361fSKent Overstreet if (!bch2_page_state_create(page, __GFP_NOFAIL)->uptodate) { 1436*e6ec361fSKent Overstreet ret = bch2_page_state_set(c, inode_inum(inode), &page, 1); 1437*e6ec361fSKent Overstreet if (ret) 1438*e6ec361fSKent Overstreet goto out; 1439*e6ec361fSKent Overstreet } 1440*e6ec361fSKent Overstreet 1441d1542e03SKent Overstreet ret = bch2_page_reservation_get(c, inode, page, res, 1442d1542e03SKent Overstreet offset, len, true); 14431c6fdbd8SKent Overstreet if (ret) { 14441c6fdbd8SKent Overstreet if (!PageUptodate(page)) { 14451c6fdbd8SKent Overstreet /* 14461c6fdbd8SKent Overstreet * If the page hasn't been read in, we won't know if we 14471c6fdbd8SKent Overstreet * actually need a reservation - we don't actually need 14481c6fdbd8SKent Overstreet * to read here, we just need to check if the page is 14491c6fdbd8SKent Overstreet * fully backed by uncompressed data: 14501c6fdbd8SKent Overstreet */ 14511c6fdbd8SKent Overstreet goto readpage; 14521c6fdbd8SKent Overstreet } 14531c6fdbd8SKent Overstreet 14541c6fdbd8SKent Overstreet goto err; 14551c6fdbd8SKent Overstreet } 14561c6fdbd8SKent Overstreet 14571c6fdbd8SKent Overstreet *pagep = page; 14581c6fdbd8SKent Overstreet return 0; 14591c6fdbd8SKent Overstreet err: 14601c6fdbd8SKent Overstreet unlock_page(page); 14611c6fdbd8SKent Overstreet put_page(page); 14621c6fdbd8SKent Overstreet *pagep = NULL; 14631c6fdbd8SKent Overstreet err_unlock: 14641c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 1465d1542e03SKent Overstreet kfree(res); 1466d1542e03SKent Overstreet *fsdata = NULL; 14671c6fdbd8SKent Overstreet return ret; 14681c6fdbd8SKent Overstreet } 14691c6fdbd8SKent Overstreet 14701c6fdbd8SKent Overstreet int bch2_write_end(struct file *file, struct address_space *mapping, 14711c6fdbd8SKent Overstreet loff_t pos, unsigned len, unsigned copied, 14721c6fdbd8SKent Overstreet struct page *page, void *fsdata) 14731c6fdbd8SKent Overstreet { 14741c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(mapping->host); 14751c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 1476d1542e03SKent Overstreet struct bch2_page_reservation *res = fsdata; 1477d1542e03SKent Overstreet unsigned offset = pos & (PAGE_SIZE - 1); 14781c6fdbd8SKent Overstreet 14791c6fdbd8SKent Overstreet lockdep_assert_held(&inode->v.i_rwsem); 14801c6fdbd8SKent Overstreet 14811c6fdbd8SKent Overstreet if (unlikely(copied < len && !PageUptodate(page))) { 14821c6fdbd8SKent Overstreet /* 14831c6fdbd8SKent Overstreet * The page needs to be read in, but that would destroy 14841c6fdbd8SKent Overstreet * our partial write - simplest thing is to just force 14851c6fdbd8SKent Overstreet * userspace to redo the write: 14861c6fdbd8SKent Overstreet */ 14871c6fdbd8SKent Overstreet zero_user(page, 0, PAGE_SIZE); 14881c6fdbd8SKent Overstreet flush_dcache_page(page); 14891c6fdbd8SKent Overstreet copied = 0; 14901c6fdbd8SKent Overstreet } 14911c6fdbd8SKent Overstreet 14921c6fdbd8SKent Overstreet spin_lock(&inode->v.i_lock); 14931c6fdbd8SKent Overstreet if (pos + copied > inode->v.i_size) 14941c6fdbd8SKent Overstreet i_size_write(&inode->v, pos + copied); 14951c6fdbd8SKent Overstreet spin_unlock(&inode->v.i_lock); 14961c6fdbd8SKent Overstreet 14971c6fdbd8SKent Overstreet if (copied) { 14981c6fdbd8SKent Overstreet if (!PageUptodate(page)) 14991c6fdbd8SKent Overstreet SetPageUptodate(page); 1500d1542e03SKent Overstreet 1501d1542e03SKent Overstreet bch2_set_page_dirty(c, inode, page, res, offset, copied); 15021c6fdbd8SKent Overstreet 15031c6fdbd8SKent Overstreet inode->ei_last_dirtied = (unsigned long) current; 15041c6fdbd8SKent Overstreet } 15051c6fdbd8SKent Overstreet 15061c6fdbd8SKent Overstreet unlock_page(page); 15071c6fdbd8SKent Overstreet put_page(page); 15081c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 15091c6fdbd8SKent Overstreet 1510d1542e03SKent Overstreet bch2_page_reservation_put(c, inode, res); 1511d1542e03SKent Overstreet kfree(res); 1512d1542e03SKent Overstreet 15131c6fdbd8SKent Overstreet return copied; 15141c6fdbd8SKent Overstreet } 15151c6fdbd8SKent Overstreet 15161c6fdbd8SKent Overstreet #define WRITE_BATCH_PAGES 32 15171c6fdbd8SKent Overstreet 15181c6fdbd8SKent Overstreet static int __bch2_buffered_write(struct bch_inode_info *inode, 15191c6fdbd8SKent Overstreet struct address_space *mapping, 15201c6fdbd8SKent Overstreet struct iov_iter *iter, 15211c6fdbd8SKent Overstreet loff_t pos, unsigned len) 15221c6fdbd8SKent Overstreet { 15231c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 15241c6fdbd8SKent Overstreet struct page *pages[WRITE_BATCH_PAGES]; 1525d1542e03SKent Overstreet struct bch2_page_reservation res; 15261c6fdbd8SKent Overstreet unsigned long index = pos >> PAGE_SHIFT; 15271c6fdbd8SKent Overstreet unsigned offset = pos & (PAGE_SIZE - 1); 15281c6fdbd8SKent Overstreet unsigned nr_pages = DIV_ROUND_UP(offset + len, PAGE_SIZE); 1529d1542e03SKent Overstreet unsigned i, reserved = 0, set_dirty = 0; 1530d1542e03SKent Overstreet unsigned copied = 0, nr_pages_copied = 0; 15311c6fdbd8SKent Overstreet int ret = 0; 15321c6fdbd8SKent Overstreet 15331c6fdbd8SKent Overstreet BUG_ON(!len); 15341c6fdbd8SKent Overstreet BUG_ON(nr_pages > ARRAY_SIZE(pages)); 15351c6fdbd8SKent Overstreet 1536d1542e03SKent Overstreet bch2_page_reservation_init(c, inode, &res); 1537d1542e03SKent Overstreet 15381c6fdbd8SKent Overstreet for (i = 0; i < nr_pages; i++) { 15391c6fdbd8SKent Overstreet pages[i] = grab_cache_page_write_begin(mapping, index + i); 15401c6fdbd8SKent Overstreet if (!pages[i]) { 15411c6fdbd8SKent Overstreet nr_pages = i; 15428de819f8SKent Overstreet if (!i) { 15431c6fdbd8SKent Overstreet ret = -ENOMEM; 15441c6fdbd8SKent Overstreet goto out; 15451c6fdbd8SKent Overstreet } 15468de819f8SKent Overstreet len = min_t(unsigned, len, 15478de819f8SKent Overstreet nr_pages * PAGE_SIZE - offset); 15488de819f8SKent Overstreet break; 15498de819f8SKent Overstreet } 15501c6fdbd8SKent Overstreet } 15511c6fdbd8SKent Overstreet 15521c6fdbd8SKent Overstreet if (offset && !PageUptodate(pages[0])) { 15531c6fdbd8SKent Overstreet ret = bch2_read_single_page(pages[0], mapping); 15541c6fdbd8SKent Overstreet if (ret) 15551c6fdbd8SKent Overstreet goto out; 15561c6fdbd8SKent Overstreet } 15571c6fdbd8SKent Overstreet 15581c6fdbd8SKent Overstreet if ((pos + len) & (PAGE_SIZE - 1) && 15591c6fdbd8SKent Overstreet !PageUptodate(pages[nr_pages - 1])) { 15601c6fdbd8SKent Overstreet if ((index + nr_pages - 1) << PAGE_SHIFT >= inode->v.i_size) { 15611c6fdbd8SKent Overstreet zero_user(pages[nr_pages - 1], 0, PAGE_SIZE); 15621c6fdbd8SKent Overstreet } else { 15631c6fdbd8SKent Overstreet ret = bch2_read_single_page(pages[nr_pages - 1], mapping); 15641c6fdbd8SKent Overstreet if (ret) 15651c6fdbd8SKent Overstreet goto out; 15661c6fdbd8SKent Overstreet } 15671c6fdbd8SKent Overstreet } 15681c6fdbd8SKent Overstreet 1569d1542e03SKent Overstreet while (reserved < len) { 1570*e6ec361fSKent Overstreet unsigned i = (offset + reserved) >> PAGE_SHIFT; 1571*e6ec361fSKent Overstreet struct page *page = pages[i]; 1572d1542e03SKent Overstreet unsigned pg_offset = (offset + reserved) & (PAGE_SIZE - 1); 1573d1542e03SKent Overstreet unsigned pg_len = min_t(unsigned, len - reserved, 1574d1542e03SKent Overstreet PAGE_SIZE - pg_offset); 15751c6fdbd8SKent Overstreet 1576*e6ec361fSKent Overstreet if (!bch2_page_state_create(page, __GFP_NOFAIL)->uptodate) { 1577*e6ec361fSKent Overstreet ret = bch2_page_state_set(c, inode_inum(inode), 1578*e6ec361fSKent Overstreet pages + i, nr_pages - i); 1579*e6ec361fSKent Overstreet if (ret) 1580*e6ec361fSKent Overstreet goto out; 15811c6fdbd8SKent Overstreet } 15821c6fdbd8SKent Overstreet 1583*e6ec361fSKent Overstreet ret = bch2_page_reservation_get(c, inode, page, &res, 1584*e6ec361fSKent Overstreet pg_offset, pg_len, true); 15851c6fdbd8SKent Overstreet if (ret) 15861c6fdbd8SKent Overstreet goto out; 1587d1542e03SKent Overstreet 1588d1542e03SKent Overstreet reserved += pg_len; 15891c6fdbd8SKent Overstreet } 15901c6fdbd8SKent Overstreet 15911c6fdbd8SKent Overstreet if (mapping_writably_mapped(mapping)) 15921c6fdbd8SKent Overstreet for (i = 0; i < nr_pages; i++) 15931c6fdbd8SKent Overstreet flush_dcache_page(pages[i]); 15941c6fdbd8SKent Overstreet 15951c6fdbd8SKent Overstreet while (copied < len) { 15961c6fdbd8SKent Overstreet struct page *page = pages[(offset + copied) >> PAGE_SHIFT]; 15971c6fdbd8SKent Overstreet unsigned pg_offset = (offset + copied) & (PAGE_SIZE - 1); 1598d1542e03SKent Overstreet unsigned pg_len = min_t(unsigned, len - copied, 15991c6fdbd8SKent Overstreet PAGE_SIZE - pg_offset); 16001c6fdbd8SKent Overstreet unsigned pg_copied = copy_page_from_iter_atomic(page, 1601d1542e03SKent Overstreet pg_offset, pg_len, iter); 1602d1542e03SKent Overstreet 1603d1542e03SKent Overstreet if (!pg_copied) 1604d1542e03SKent Overstreet break; 16051c6fdbd8SKent Overstreet 1606912bdf17SKent Overstreet if (!PageUptodate(page) && 1607912bdf17SKent Overstreet pg_copied != PAGE_SIZE && 1608912bdf17SKent Overstreet pos + copied + pg_copied < inode->v.i_size) { 1609912bdf17SKent Overstreet zero_user(page, 0, PAGE_SIZE); 1610912bdf17SKent Overstreet break; 1611912bdf17SKent Overstreet } 1612912bdf17SKent Overstreet 16131c6fdbd8SKent Overstreet flush_dcache_page(page); 16141c6fdbd8SKent Overstreet copied += pg_copied; 1615912bdf17SKent Overstreet 1616912bdf17SKent Overstreet if (pg_copied != pg_len) 1617912bdf17SKent Overstreet break; 16181c6fdbd8SKent Overstreet } 16191c6fdbd8SKent Overstreet 16201c6fdbd8SKent Overstreet if (!copied) 16211c6fdbd8SKent Overstreet goto out; 16221c6fdbd8SKent Overstreet 1623877dfb34SKent Overstreet spin_lock(&inode->v.i_lock); 1624877dfb34SKent Overstreet if (pos + copied > inode->v.i_size) 1625877dfb34SKent Overstreet i_size_write(&inode->v, pos + copied); 1626877dfb34SKent Overstreet spin_unlock(&inode->v.i_lock); 1627877dfb34SKent Overstreet 1628d1542e03SKent Overstreet while (set_dirty < copied) { 1629d1542e03SKent Overstreet struct page *page = pages[(offset + set_dirty) >> PAGE_SHIFT]; 1630d1542e03SKent Overstreet unsigned pg_offset = (offset + set_dirty) & (PAGE_SIZE - 1); 1631d1542e03SKent Overstreet unsigned pg_len = min_t(unsigned, copied - set_dirty, 1632d1542e03SKent Overstreet PAGE_SIZE - pg_offset); 1633d1542e03SKent Overstreet 1634d1542e03SKent Overstreet if (!PageUptodate(page)) 1635d1542e03SKent Overstreet SetPageUptodate(page); 1636d1542e03SKent Overstreet 1637d1542e03SKent Overstreet bch2_set_page_dirty(c, inode, page, &res, pg_offset, pg_len); 1638d1542e03SKent Overstreet unlock_page(page); 1639d1542e03SKent Overstreet put_page(page); 1640d1542e03SKent Overstreet 1641d1542e03SKent Overstreet set_dirty += pg_len; 1642d1542e03SKent Overstreet } 1643877dfb34SKent Overstreet 1644877dfb34SKent Overstreet nr_pages_copied = DIV_ROUND_UP(offset + copied, PAGE_SIZE); 1645877dfb34SKent Overstreet inode->ei_last_dirtied = (unsigned long) current; 16461c6fdbd8SKent Overstreet out: 1647d1542e03SKent Overstreet for (i = nr_pages_copied; i < nr_pages; i++) { 16481c6fdbd8SKent Overstreet unlock_page(pages[i]); 16491c6fdbd8SKent Overstreet put_page(pages[i]); 16501c6fdbd8SKent Overstreet } 16511c6fdbd8SKent Overstreet 1652d1542e03SKent Overstreet bch2_page_reservation_put(c, inode, &res); 16531c6fdbd8SKent Overstreet 16541c6fdbd8SKent Overstreet return copied ?: ret; 16551c6fdbd8SKent Overstreet } 16561c6fdbd8SKent Overstreet 16571c6fdbd8SKent Overstreet static ssize_t bch2_buffered_write(struct kiocb *iocb, struct iov_iter *iter) 16581c6fdbd8SKent Overstreet { 16591c6fdbd8SKent Overstreet struct file *file = iocb->ki_filp; 16601c6fdbd8SKent Overstreet struct address_space *mapping = file->f_mapping; 16611c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 16621c6fdbd8SKent Overstreet loff_t pos = iocb->ki_pos; 16631c6fdbd8SKent Overstreet ssize_t written = 0; 16641c6fdbd8SKent Overstreet int ret = 0; 16651c6fdbd8SKent Overstreet 16661c6fdbd8SKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 16671c6fdbd8SKent Overstreet 16681c6fdbd8SKent Overstreet do { 16691c6fdbd8SKent Overstreet unsigned offset = pos & (PAGE_SIZE - 1); 16701c6fdbd8SKent Overstreet unsigned bytes = min_t(unsigned long, iov_iter_count(iter), 16711c6fdbd8SKent Overstreet PAGE_SIZE * WRITE_BATCH_PAGES - offset); 16721c6fdbd8SKent Overstreet again: 16731c6fdbd8SKent Overstreet /* 16741c6fdbd8SKent Overstreet * Bring in the user page that we will copy from _first_. 16751c6fdbd8SKent Overstreet * Otherwise there's a nasty deadlock on copying from the 16761c6fdbd8SKent Overstreet * same page as we're writing to, without it being marked 16771c6fdbd8SKent Overstreet * up-to-date. 16781c6fdbd8SKent Overstreet * 16791c6fdbd8SKent Overstreet * Not only is this an optimisation, but it is also required 16801c6fdbd8SKent Overstreet * to check that the address is actually valid, when atomic 16811c6fdbd8SKent Overstreet * usercopies are used, below. 16821c6fdbd8SKent Overstreet */ 16831c6fdbd8SKent Overstreet if (unlikely(fault_in_iov_iter_readable(iter, bytes))) { 16841c6fdbd8SKent Overstreet bytes = min_t(unsigned long, iov_iter_count(iter), 16851c6fdbd8SKent Overstreet PAGE_SIZE - offset); 16861c6fdbd8SKent Overstreet 16871c6fdbd8SKent Overstreet if (unlikely(fault_in_iov_iter_readable(iter, bytes))) { 16881c6fdbd8SKent Overstreet ret = -EFAULT; 16891c6fdbd8SKent Overstreet break; 16901c6fdbd8SKent Overstreet } 16911c6fdbd8SKent Overstreet } 16921c6fdbd8SKent Overstreet 16931c6fdbd8SKent Overstreet if (unlikely(fatal_signal_pending(current))) { 16941c6fdbd8SKent Overstreet ret = -EINTR; 16951c6fdbd8SKent Overstreet break; 16961c6fdbd8SKent Overstreet } 16971c6fdbd8SKent Overstreet 16981c6fdbd8SKent Overstreet ret = __bch2_buffered_write(inode, mapping, iter, pos, bytes); 16991c6fdbd8SKent Overstreet if (unlikely(ret < 0)) 17001c6fdbd8SKent Overstreet break; 17011c6fdbd8SKent Overstreet 17021c6fdbd8SKent Overstreet cond_resched(); 17031c6fdbd8SKent Overstreet 17041c6fdbd8SKent Overstreet if (unlikely(ret == 0)) { 17051c6fdbd8SKent Overstreet /* 17061c6fdbd8SKent Overstreet * If we were unable to copy any data at all, we must 17071c6fdbd8SKent Overstreet * fall back to a single segment length write. 17081c6fdbd8SKent Overstreet * 17091c6fdbd8SKent Overstreet * If we didn't fallback here, we could livelock 17101c6fdbd8SKent Overstreet * because not all segments in the iov can be copied at 17111c6fdbd8SKent Overstreet * once without a pagefault. 17121c6fdbd8SKent Overstreet */ 17131c6fdbd8SKent Overstreet bytes = min_t(unsigned long, PAGE_SIZE - offset, 17141c6fdbd8SKent Overstreet iov_iter_single_seg_count(iter)); 17151c6fdbd8SKent Overstreet goto again; 17161c6fdbd8SKent Overstreet } 17171c6fdbd8SKent Overstreet pos += ret; 17181c6fdbd8SKent Overstreet written += ret; 1719912bdf17SKent Overstreet ret = 0; 17201c6fdbd8SKent Overstreet 17211c6fdbd8SKent Overstreet balance_dirty_pages_ratelimited(mapping); 17221c6fdbd8SKent Overstreet } while (iov_iter_count(iter)); 17231c6fdbd8SKent Overstreet 17241c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 17251c6fdbd8SKent Overstreet 17261c6fdbd8SKent Overstreet return written ? written : ret; 17271c6fdbd8SKent Overstreet } 17281c6fdbd8SKent Overstreet 17291c6fdbd8SKent Overstreet /* O_DIRECT reads */ 17301c6fdbd8SKent Overstreet 1731b4725cc1SKent Overstreet static void bio_check_or_release(struct bio *bio, bool check_dirty) 1732b4725cc1SKent Overstreet { 1733b4725cc1SKent Overstreet if (check_dirty) { 1734b4725cc1SKent Overstreet bio_check_pages_dirty(bio); 1735b4725cc1SKent Overstreet } else { 1736b4725cc1SKent Overstreet bio_release_pages(bio, false); 1737b4725cc1SKent Overstreet bio_put(bio); 1738b4725cc1SKent Overstreet } 1739b4725cc1SKent Overstreet } 1740b4725cc1SKent Overstreet 17411c6fdbd8SKent Overstreet static void bch2_dio_read_complete(struct closure *cl) 17421c6fdbd8SKent Overstreet { 17431c6fdbd8SKent Overstreet struct dio_read *dio = container_of(cl, struct dio_read, cl); 17441c6fdbd8SKent Overstreet 17451c6fdbd8SKent Overstreet dio->req->ki_complete(dio->req, dio->ret); 1746b4725cc1SKent Overstreet bio_check_or_release(&dio->rbio.bio, dio->should_dirty); 17471c6fdbd8SKent Overstreet } 17481c6fdbd8SKent Overstreet 17491c6fdbd8SKent Overstreet static void bch2_direct_IO_read_endio(struct bio *bio) 17501c6fdbd8SKent Overstreet { 17511c6fdbd8SKent Overstreet struct dio_read *dio = bio->bi_private; 17521c6fdbd8SKent Overstreet 17531c6fdbd8SKent Overstreet if (bio->bi_status) 17541c6fdbd8SKent Overstreet dio->ret = blk_status_to_errno(bio->bi_status); 17551c6fdbd8SKent Overstreet 17561c6fdbd8SKent Overstreet closure_put(&dio->cl); 17571c6fdbd8SKent Overstreet } 17581c6fdbd8SKent Overstreet 17591c6fdbd8SKent Overstreet static void bch2_direct_IO_read_split_endio(struct bio *bio) 17601c6fdbd8SKent Overstreet { 1761b4725cc1SKent Overstreet struct dio_read *dio = bio->bi_private; 1762b4725cc1SKent Overstreet bool should_dirty = dio->should_dirty; 1763b4725cc1SKent Overstreet 17641c6fdbd8SKent Overstreet bch2_direct_IO_read_endio(bio); 1765b4725cc1SKent Overstreet bio_check_or_release(bio, should_dirty); 17661c6fdbd8SKent Overstreet } 17671c6fdbd8SKent Overstreet 17681c6fdbd8SKent Overstreet static int bch2_direct_IO_read(struct kiocb *req, struct iov_iter *iter) 17691c6fdbd8SKent Overstreet { 17701c6fdbd8SKent Overstreet struct file *file = req->ki_filp; 17711c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 17721c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 17739a3df993SKent Overstreet struct bch_io_opts opts = io_opts(c, &inode->ei_inode); 17741c6fdbd8SKent Overstreet struct dio_read *dio; 17751c6fdbd8SKent Overstreet struct bio *bio; 17761c6fdbd8SKent Overstreet loff_t offset = req->ki_pos; 17771c6fdbd8SKent Overstreet bool sync = is_sync_kiocb(req); 17781c6fdbd8SKent Overstreet size_t shorten; 17791c6fdbd8SKent Overstreet ssize_t ret; 17801c6fdbd8SKent Overstreet 17811c6fdbd8SKent Overstreet if ((offset|iter->count) & (block_bytes(c) - 1)) 17821c6fdbd8SKent Overstreet return -EINVAL; 17831c6fdbd8SKent Overstreet 17841c6fdbd8SKent Overstreet ret = min_t(loff_t, iter->count, 17851c6fdbd8SKent Overstreet max_t(loff_t, 0, i_size_read(&inode->v) - offset)); 17861c6fdbd8SKent Overstreet 17871c6fdbd8SKent Overstreet if (!ret) 17881c6fdbd8SKent Overstreet return ret; 17891c6fdbd8SKent Overstreet 17901c6fdbd8SKent Overstreet shorten = iov_iter_count(iter) - round_up(ret, block_bytes(c)); 17911c6fdbd8SKent Overstreet iter->count -= shorten; 17921c6fdbd8SKent Overstreet 17931c6fdbd8SKent Overstreet bio = bio_alloc_bioset(NULL, 17941c6fdbd8SKent Overstreet iov_iter_npages(iter, BIO_MAX_VECS), 17951c6fdbd8SKent Overstreet REQ_OP_READ, 17961c6fdbd8SKent Overstreet GFP_KERNEL, 17971c6fdbd8SKent Overstreet &c->dio_read_bioset); 17981c6fdbd8SKent Overstreet 17991c6fdbd8SKent Overstreet bio->bi_end_io = bch2_direct_IO_read_endio; 18001c6fdbd8SKent Overstreet 18011c6fdbd8SKent Overstreet dio = container_of(bio, struct dio_read, rbio.bio); 18021c6fdbd8SKent Overstreet closure_init(&dio->cl, NULL); 18031c6fdbd8SKent Overstreet 18041c6fdbd8SKent Overstreet /* 18051c6fdbd8SKent Overstreet * this is a _really_ horrible hack just to avoid an atomic sub at the 18061c6fdbd8SKent Overstreet * end: 18071c6fdbd8SKent Overstreet */ 18081c6fdbd8SKent Overstreet if (!sync) { 18091c6fdbd8SKent Overstreet set_closure_fn(&dio->cl, bch2_dio_read_complete, NULL); 18101c6fdbd8SKent Overstreet atomic_set(&dio->cl.remaining, 18111c6fdbd8SKent Overstreet CLOSURE_REMAINING_INITIALIZER - 18121c6fdbd8SKent Overstreet CLOSURE_RUNNING + 18131c6fdbd8SKent Overstreet CLOSURE_DESTRUCTOR); 18141c6fdbd8SKent Overstreet } else { 18151c6fdbd8SKent Overstreet atomic_set(&dio->cl.remaining, 18161c6fdbd8SKent Overstreet CLOSURE_REMAINING_INITIALIZER + 1); 18171c6fdbd8SKent Overstreet } 18181c6fdbd8SKent Overstreet 18191c6fdbd8SKent Overstreet dio->req = req; 18201c6fdbd8SKent Overstreet dio->ret = ret; 1821b4725cc1SKent Overstreet /* 1822b4725cc1SKent Overstreet * This is one of the sketchier things I've encountered: we have to skip 1823b4725cc1SKent Overstreet * the dirtying of requests that are internal from the kernel (i.e. from 1824b4725cc1SKent Overstreet * loopback), because we'll deadlock on page_lock. 1825b4725cc1SKent Overstreet */ 1826b4725cc1SKent Overstreet dio->should_dirty = iter_is_iovec(iter); 18271c6fdbd8SKent Overstreet 18281c6fdbd8SKent Overstreet goto start; 18291c6fdbd8SKent Overstreet while (iter->count) { 18301c6fdbd8SKent Overstreet bio = bio_alloc_bioset(NULL, 18311c6fdbd8SKent Overstreet iov_iter_npages(iter, BIO_MAX_VECS), 18321c6fdbd8SKent Overstreet REQ_OP_READ, 18331c6fdbd8SKent Overstreet GFP_KERNEL, 18341c6fdbd8SKent Overstreet &c->bio_read); 18351c6fdbd8SKent Overstreet bio->bi_end_io = bch2_direct_IO_read_split_endio; 18361c6fdbd8SKent Overstreet start: 18371c6fdbd8SKent Overstreet bio->bi_opf = REQ_OP_READ|REQ_SYNC; 18381c6fdbd8SKent Overstreet bio->bi_iter.bi_sector = offset >> 9; 18391c6fdbd8SKent Overstreet bio->bi_private = dio; 18401c6fdbd8SKent Overstreet 18411c6fdbd8SKent Overstreet ret = bio_iov_iter_get_pages(bio, iter); 18421c6fdbd8SKent Overstreet if (ret < 0) { 18431c6fdbd8SKent Overstreet /* XXX: fault inject this path */ 18441c6fdbd8SKent Overstreet bio->bi_status = BLK_STS_RESOURCE; 18451c6fdbd8SKent Overstreet bio_endio(bio); 18461c6fdbd8SKent Overstreet break; 18471c6fdbd8SKent Overstreet } 18481c6fdbd8SKent Overstreet 18491c6fdbd8SKent Overstreet offset += bio->bi_iter.bi_size; 1850b4725cc1SKent Overstreet 1851b4725cc1SKent Overstreet if (dio->should_dirty) 18521c6fdbd8SKent Overstreet bio_set_pages_dirty(bio); 18531c6fdbd8SKent Overstreet 18541c6fdbd8SKent Overstreet if (iter->count) 18551c6fdbd8SKent Overstreet closure_get(&dio->cl); 18561c6fdbd8SKent Overstreet 18578c6d298aSKent Overstreet bch2_read(c, rbio_init(bio, opts), inode_inum(inode)); 18581c6fdbd8SKent Overstreet } 18591c6fdbd8SKent Overstreet 18601c6fdbd8SKent Overstreet iter->count += shorten; 18611c6fdbd8SKent Overstreet 18621c6fdbd8SKent Overstreet if (sync) { 18631c6fdbd8SKent Overstreet closure_sync(&dio->cl); 18641c6fdbd8SKent Overstreet closure_debug_destroy(&dio->cl); 18651c6fdbd8SKent Overstreet ret = dio->ret; 1866b4725cc1SKent Overstreet bio_check_or_release(&dio->rbio.bio, dio->should_dirty); 18671c6fdbd8SKent Overstreet return ret; 18681c6fdbd8SKent Overstreet } else { 18691c6fdbd8SKent Overstreet return -EIOCBQUEUED; 18701c6fdbd8SKent Overstreet } 18711c6fdbd8SKent Overstreet } 18721c6fdbd8SKent Overstreet 18731c6fdbd8SKent Overstreet ssize_t bch2_read_iter(struct kiocb *iocb, struct iov_iter *iter) 18741c6fdbd8SKent Overstreet { 18751c6fdbd8SKent Overstreet struct file *file = iocb->ki_filp; 18761c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 18771c6fdbd8SKent Overstreet struct address_space *mapping = file->f_mapping; 18781c6fdbd8SKent Overstreet size_t count = iov_iter_count(iter); 18791c6fdbd8SKent Overstreet ssize_t ret; 18801c6fdbd8SKent Overstreet 18811c6fdbd8SKent Overstreet if (!count) 18821c6fdbd8SKent Overstreet return 0; /* skip atime */ 18831c6fdbd8SKent Overstreet 18841c6fdbd8SKent Overstreet if (iocb->ki_flags & IOCB_DIRECT) { 18851c6fdbd8SKent Overstreet struct blk_plug plug; 18861c6fdbd8SKent Overstreet 1887a023127aSKent Overstreet if (unlikely(mapping->nrpages)) { 18881c6fdbd8SKent Overstreet ret = filemap_write_and_wait_range(mapping, 18891c6fdbd8SKent Overstreet iocb->ki_pos, 18901c6fdbd8SKent Overstreet iocb->ki_pos + count - 1); 18911c6fdbd8SKent Overstreet if (ret < 0) 18921c6fdbd8SKent Overstreet return ret; 1893a023127aSKent Overstreet } 18941c6fdbd8SKent Overstreet 18951c6fdbd8SKent Overstreet file_accessed(file); 18961c6fdbd8SKent Overstreet 18971c6fdbd8SKent Overstreet blk_start_plug(&plug); 18981c6fdbd8SKent Overstreet ret = bch2_direct_IO_read(iocb, iter); 18991c6fdbd8SKent Overstreet blk_finish_plug(&plug); 19001c6fdbd8SKent Overstreet 19011c6fdbd8SKent Overstreet if (ret >= 0) 19021c6fdbd8SKent Overstreet iocb->ki_pos += ret; 19031c6fdbd8SKent Overstreet } else { 19041c6fdbd8SKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 19051c6fdbd8SKent Overstreet ret = generic_file_read_iter(iocb, iter); 19061c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 19071c6fdbd8SKent Overstreet } 19081c6fdbd8SKent Overstreet 19091c6fdbd8SKent Overstreet return ret; 19101c6fdbd8SKent Overstreet } 19111c6fdbd8SKent Overstreet 19121c6fdbd8SKent Overstreet /* O_DIRECT writes */ 19131c6fdbd8SKent Overstreet 19146fed42bbSKent Overstreet static bool bch2_check_range_allocated(struct bch_fs *c, subvol_inum inum, 19156fed42bbSKent Overstreet u64 offset, u64 size, 19166fed42bbSKent Overstreet unsigned nr_replicas, bool compressed) 19176fed42bbSKent Overstreet { 19186fed42bbSKent Overstreet struct btree_trans trans; 19196fed42bbSKent Overstreet struct btree_iter iter; 19206fed42bbSKent Overstreet struct bkey_s_c k; 19216fed42bbSKent Overstreet u64 end = offset + size; 19226fed42bbSKent Overstreet u32 snapshot; 19236fed42bbSKent Overstreet bool ret = true; 19246fed42bbSKent Overstreet int err; 19256fed42bbSKent Overstreet 19266fed42bbSKent Overstreet bch2_trans_init(&trans, c, 0, 0); 19276fed42bbSKent Overstreet retry: 19286fed42bbSKent Overstreet bch2_trans_begin(&trans); 19296fed42bbSKent Overstreet 19306fed42bbSKent Overstreet err = bch2_subvolume_get_snapshot(&trans, inum.subvol, &snapshot); 19316fed42bbSKent Overstreet if (err) 19326fed42bbSKent Overstreet goto err; 19336fed42bbSKent Overstreet 1934e5fa91d7SKent Overstreet for_each_btree_key_norestart(&trans, iter, BTREE_ID_extents, 19356fed42bbSKent Overstreet SPOS(inum.inum, offset, snapshot), 19366fed42bbSKent Overstreet BTREE_ITER_SLOTS, k, err) { 19376fed42bbSKent Overstreet if (bkey_cmp(bkey_start_pos(k.k), POS(inum.inum, end)) >= 0) 19386fed42bbSKent Overstreet break; 19396fed42bbSKent Overstreet 19408c6d298aSKent Overstreet if (k.k->p.snapshot != snapshot || 19418c6d298aSKent Overstreet nr_replicas > bch2_bkey_replicas(c, k) || 19426fed42bbSKent Overstreet (!compressed && bch2_bkey_sectors_compressed(k))) { 19436fed42bbSKent Overstreet ret = false; 19446fed42bbSKent Overstreet break; 19456fed42bbSKent Overstreet } 19466fed42bbSKent Overstreet } 19476fed42bbSKent Overstreet 19486fed42bbSKent Overstreet offset = iter.pos.offset; 19496fed42bbSKent Overstreet bch2_trans_iter_exit(&trans, &iter); 19506fed42bbSKent Overstreet err: 19516fed42bbSKent Overstreet if (err == -EINTR) 19526fed42bbSKent Overstreet goto retry; 19536fed42bbSKent Overstreet bch2_trans_exit(&trans); 19546fed42bbSKent Overstreet 19556fed42bbSKent Overstreet return err ? false : ret; 19566fed42bbSKent Overstreet } 19576fed42bbSKent Overstreet 19581c6fdbd8SKent Overstreet /* 19591c6fdbd8SKent Overstreet * We're going to return -EIOCBQUEUED, but we haven't finished consuming the 19601c6fdbd8SKent Overstreet * iov_iter yet, so we need to stash a copy of the iovec: it might be on the 19611c6fdbd8SKent Overstreet * caller's stack, we're not guaranteed that it will live for the duration of 19621c6fdbd8SKent Overstreet * the IO: 19631c6fdbd8SKent Overstreet */ 19641c6fdbd8SKent Overstreet static noinline int bch2_dio_write_copy_iov(struct dio_write *dio) 19651c6fdbd8SKent Overstreet { 19661c6fdbd8SKent Overstreet struct iovec *iov = dio->inline_vecs; 19671c6fdbd8SKent Overstreet 19681c6fdbd8SKent Overstreet /* 19691c6fdbd8SKent Overstreet * iov_iter has a single embedded iovec - nothing to do: 19701c6fdbd8SKent Overstreet */ 19711c6fdbd8SKent Overstreet if (iter_is_ubuf(&dio->iter)) 19721c6fdbd8SKent Overstreet return 0; 19731c6fdbd8SKent Overstreet 19741c6fdbd8SKent Overstreet /* 19751c6fdbd8SKent Overstreet * We don't currently handle non-iovec iov_iters here - return an error, 19761c6fdbd8SKent Overstreet * and we'll fall back to doing the IO synchronously: 19771c6fdbd8SKent Overstreet */ 19781c6fdbd8SKent Overstreet if (!iter_is_iovec(&dio->iter)) 19791c6fdbd8SKent Overstreet return -1; 19801c6fdbd8SKent Overstreet 19811c6fdbd8SKent Overstreet if (dio->iter.nr_segs > ARRAY_SIZE(dio->inline_vecs)) { 19821c6fdbd8SKent Overstreet iov = kmalloc_array(dio->iter.nr_segs, sizeof(*iov), 19831c6fdbd8SKent Overstreet GFP_KERNEL); 19841c6fdbd8SKent Overstreet if (unlikely(!iov)) 19851c6fdbd8SKent Overstreet return -ENOMEM; 19861c6fdbd8SKent Overstreet 19871c6fdbd8SKent Overstreet dio->free_iov = true; 19881c6fdbd8SKent Overstreet } 19891c6fdbd8SKent Overstreet 19901c6fdbd8SKent Overstreet memcpy(iov, dio->iter.__iov, dio->iter.nr_segs * sizeof(*iov)); 19911c6fdbd8SKent Overstreet dio->iter.__iov = iov; 19921c6fdbd8SKent Overstreet return 0; 19931c6fdbd8SKent Overstreet } 19941c6fdbd8SKent Overstreet 1995042a1f26SKent Overstreet static void bch2_dio_write_loop_async(struct bch_write_op *); 1996042a1f26SKent Overstreet 19971c6fdbd8SKent Overstreet static long bch2_dio_write_loop(struct dio_write *dio) 19981c6fdbd8SKent Overstreet { 1999ed484030SKent Overstreet bool kthread = (current->flags & PF_KTHREAD) != 0; 20001c6fdbd8SKent Overstreet struct kiocb *req = dio->req; 20011c6fdbd8SKent Overstreet struct address_space *mapping = req->ki_filp->f_mapping; 20029a3df993SKent Overstreet struct bch_inode_info *inode = file_bch_inode(req->ki_filp); 2003042a1f26SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 20049a3df993SKent Overstreet struct bio *bio = &dio->op.wbio.bio; 2005eb8e6e9cSKent Overstreet unsigned unaligned, iter_count; 2006eb8e6e9cSKent Overstreet bool sync = dio->sync, dropped_locks; 20071c6fdbd8SKent Overstreet long ret; 20081c6fdbd8SKent Overstreet 20091c6fdbd8SKent Overstreet if (dio->loop) 20101c6fdbd8SKent Overstreet goto loop; 20111c6fdbd8SKent Overstreet 20121c6fdbd8SKent Overstreet while (1) { 2013eb8e6e9cSKent Overstreet iter_count = dio->iter.count; 2014eb8e6e9cSKent Overstreet 2015ed484030SKent Overstreet if (kthread) 2016ed484030SKent Overstreet kthread_use_mm(dio->mm); 20171c6fdbd8SKent Overstreet BUG_ON(current->faults_disabled_mapping); 20181c6fdbd8SKent Overstreet current->faults_disabled_mapping = mapping; 20191c6fdbd8SKent Overstreet 20201c6fdbd8SKent Overstreet ret = bio_iov_iter_get_pages(bio, &dio->iter); 20211c6fdbd8SKent Overstreet 2022eb8e6e9cSKent Overstreet dropped_locks = fdm_dropped_locks(); 2023eb8e6e9cSKent Overstreet 20241c6fdbd8SKent Overstreet current->faults_disabled_mapping = NULL; 2025ed484030SKent Overstreet if (kthread) 2026ed484030SKent Overstreet kthread_unuse_mm(dio->mm); 20271c6fdbd8SKent Overstreet 2028eb8e6e9cSKent Overstreet /* 2029eb8e6e9cSKent Overstreet * If the fault handler returned an error but also signalled 2030eb8e6e9cSKent Overstreet * that it dropped & retook ei_pagecache_lock, we just need to 2031eb8e6e9cSKent Overstreet * re-shoot down the page cache and retry: 2032eb8e6e9cSKent Overstreet */ 2033eb8e6e9cSKent Overstreet if (dropped_locks && ret) 2034eb8e6e9cSKent Overstreet ret = 0; 2035eb8e6e9cSKent Overstreet 20361c6fdbd8SKent Overstreet if (unlikely(ret < 0)) 20371c6fdbd8SKent Overstreet goto err; 20381c6fdbd8SKent Overstreet 2039eb8e6e9cSKent Overstreet if (unlikely(dropped_locks)) { 2040eb8e6e9cSKent Overstreet ret = write_invalidate_inode_pages_range(mapping, 2041eb8e6e9cSKent Overstreet req->ki_pos, 2042eb8e6e9cSKent Overstreet req->ki_pos + iter_count - 1); 2043eb8e6e9cSKent Overstreet if (unlikely(ret)) 2044eb8e6e9cSKent Overstreet goto err; 2045eb8e6e9cSKent Overstreet 2046eb8e6e9cSKent Overstreet if (!bio->bi_iter.bi_size) 2047eb8e6e9cSKent Overstreet continue; 2048eb8e6e9cSKent Overstreet } 2049eb8e6e9cSKent Overstreet 20500a426c32SKent Overstreet unaligned = bio->bi_iter.bi_size & (block_bytes(c) - 1); 20510a426c32SKent Overstreet bio->bi_iter.bi_size -= unaligned; 20520a426c32SKent Overstreet iov_iter_revert(&dio->iter, unaligned); 20530a426c32SKent Overstreet 20540a426c32SKent Overstreet if (!bio->bi_iter.bi_size) { 20550a426c32SKent Overstreet /* 20560a426c32SKent Overstreet * bio_iov_iter_get_pages was only able to get < 20570a426c32SKent Overstreet * blocksize worth of pages: 20580a426c32SKent Overstreet */ 20590a426c32SKent Overstreet ret = -EFAULT; 20600a426c32SKent Overstreet goto err; 20610a426c32SKent Overstreet } 20620a426c32SKent Overstreet 2063042a1f26SKent Overstreet bch2_write_op_init(&dio->op, c, io_opts(c, &inode->ei_inode)); 2064042a1f26SKent Overstreet dio->op.end_io = bch2_dio_write_loop_async; 2065042a1f26SKent Overstreet dio->op.target = dio->op.opts.foreground_target; 2066042a1f26SKent Overstreet dio->op.write_point = writepoint_hashed((unsigned long) current); 2067042a1f26SKent Overstreet dio->op.nr_replicas = dio->op.opts.data_replicas; 20688c6d298aSKent Overstreet dio->op.subvol = inode->ei_subvol; 2069042a1f26SKent Overstreet dio->op.pos = POS(inode->v.i_ino, (u64) req->ki_pos >> 9); 2070042a1f26SKent Overstreet 2071042a1f26SKent Overstreet if ((req->ki_flags & IOCB_DSYNC) && 2072042a1f26SKent Overstreet !c->opts.journal_flush_disabled) 2073042a1f26SKent Overstreet dio->op.flags |= BCH_WRITE_FLUSH; 2074a6336910SKent Overstreet dio->op.flags |= BCH_WRITE_CHECK_ENOSPC; 2075042a1f26SKent Overstreet 2076042a1f26SKent Overstreet ret = bch2_disk_reservation_get(c, &dio->op.res, bio_sectors(bio), 2077042a1f26SKent Overstreet dio->op.opts.data_replicas, 0); 2078042a1f26SKent Overstreet if (unlikely(ret) && 20796fed42bbSKent Overstreet !bch2_check_range_allocated(c, inode_inum(inode), 20806fed42bbSKent Overstreet dio->op.pos.offset, bio_sectors(bio), 208135a067b4SKent Overstreet dio->op.opts.data_replicas, 208235a067b4SKent Overstreet dio->op.opts.compression != 0)) 2083042a1f26SKent Overstreet goto err; 20841c6fdbd8SKent Overstreet 20851c6fdbd8SKent Overstreet task_io_account_write(bio->bi_iter.bi_size); 20861c6fdbd8SKent Overstreet 20871c6fdbd8SKent Overstreet if (!dio->sync && !dio->loop && dio->iter.count) { 20881c6fdbd8SKent Overstreet if (bch2_dio_write_copy_iov(dio)) { 2089286d8ad0SKent Overstreet dio->sync = sync = true; 2090f8f30863SKent Overstreet goto do_io; 20911c6fdbd8SKent Overstreet } 20921c6fdbd8SKent Overstreet } 2093f8f30863SKent Overstreet do_io: 20941c6fdbd8SKent Overstreet dio->loop = true; 2095f8f30863SKent Overstreet closure_call(&dio->op.cl, bch2_write, NULL, NULL); 20961c6fdbd8SKent Overstreet 2097286d8ad0SKent Overstreet if (sync) 2098f8f30863SKent Overstreet wait_for_completion(&dio->done); 2099f8f30863SKent Overstreet else 21001c6fdbd8SKent Overstreet return -EIOCBQUEUED; 21011c6fdbd8SKent Overstreet loop: 21029a3df993SKent Overstreet i_sectors_acct(c, inode, &dio->quota_res, 21039a3df993SKent Overstreet dio->op.i_sectors_delta); 2104042a1f26SKent Overstreet req->ki_pos += (u64) dio->op.written << 9; 2105042a1f26SKent Overstreet dio->written += dio->op.written; 21069a3df993SKent Overstreet 21079a3df993SKent Overstreet spin_lock(&inode->v.i_lock); 2108042a1f26SKent Overstreet if (req->ki_pos > inode->v.i_size) 2109042a1f26SKent Overstreet i_size_write(&inode->v, req->ki_pos); 21109a3df993SKent Overstreet spin_unlock(&inode->v.i_lock); 21119a3df993SKent Overstreet 2112032ac32cSKent Overstreet bio_release_pages(bio, false); 21135468f119SKent Overstreet bio->bi_vcnt = 0; 211433c74e41SKent Overstreet 211533c74e41SKent Overstreet if (dio->op.error) { 211633c74e41SKent Overstreet set_bit(EI_INODE_ERROR, &inode->ei_flags); 211733c74e41SKent Overstreet break; 211833c74e41SKent Overstreet } 211933c74e41SKent Overstreet 212033c74e41SKent Overstreet if (!dio->iter.count) 21211c6fdbd8SKent Overstreet break; 2122f8f30863SKent Overstreet 21231c6fdbd8SKent Overstreet bio_reset(bio, NULL, REQ_OP_WRITE); 2124f8f30863SKent Overstreet reinit_completion(&dio->done); 21251c6fdbd8SKent Overstreet } 21261c6fdbd8SKent Overstreet 2127042a1f26SKent Overstreet ret = dio->op.error ?: ((long) dio->written << 9); 21281c6fdbd8SKent Overstreet err: 21291c6fdbd8SKent Overstreet bch2_pagecache_block_put(&inode->ei_pagecache_lock); 21300a426c32SKent Overstreet bch2_quota_reservation_put(c, inode, &dio->quota_res); 21311c6fdbd8SKent Overstreet 21321c6fdbd8SKent Overstreet if (dio->free_iov) 21331c6fdbd8SKent Overstreet kfree(dio->iter.__iov); 21341c6fdbd8SKent Overstreet 21355468f119SKent Overstreet bio_release_pages(bio, false); 21361c6fdbd8SKent Overstreet bio_put(bio); 21371c6fdbd8SKent Overstreet 21381c6fdbd8SKent Overstreet /* inode->i_dio_count is our ref on inode and thus bch_fs */ 21391c6fdbd8SKent Overstreet inode_dio_end(&inode->v); 21401c6fdbd8SKent Overstreet 21411c6fdbd8SKent Overstreet if (!sync) { 21421c6fdbd8SKent Overstreet req->ki_complete(req, ret); 21431c6fdbd8SKent Overstreet ret = -EIOCBQUEUED; 21441c6fdbd8SKent Overstreet } 21451c6fdbd8SKent Overstreet return ret; 21461c6fdbd8SKent Overstreet } 21471c6fdbd8SKent Overstreet 2148f8f30863SKent Overstreet static void bch2_dio_write_loop_async(struct bch_write_op *op) 21491c6fdbd8SKent Overstreet { 2150f8f30863SKent Overstreet struct dio_write *dio = container_of(op, struct dio_write, op); 21511c6fdbd8SKent Overstreet 2152f8f30863SKent Overstreet if (dio->sync) 2153f8f30863SKent Overstreet complete(&dio->done); 2154f8f30863SKent Overstreet else 21551c6fdbd8SKent Overstreet bch2_dio_write_loop(dio); 21561c6fdbd8SKent Overstreet } 21571c6fdbd8SKent Overstreet 21581c6fdbd8SKent Overstreet static noinline 21591c6fdbd8SKent Overstreet ssize_t bch2_direct_write(struct kiocb *req, struct iov_iter *iter) 21601c6fdbd8SKent Overstreet { 21611c6fdbd8SKent Overstreet struct file *file = req->ki_filp; 216254847d25SKent Overstreet struct address_space *mapping = file->f_mapping; 21631c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 21641c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 21651c6fdbd8SKent Overstreet struct dio_write *dio; 21661c6fdbd8SKent Overstreet struct bio *bio; 21677edcfbfeSKent Overstreet bool locked = true, extending; 21681c6fdbd8SKent Overstreet ssize_t ret; 21691c6fdbd8SKent Overstreet 21707edcfbfeSKent Overstreet prefetch(&c->opts); 21717edcfbfeSKent Overstreet prefetch((void *) &c->opts + 64); 21727edcfbfeSKent Overstreet prefetch(&inode->ei_inode); 21737edcfbfeSKent Overstreet prefetch((void *) &inode->ei_inode + 64); 21741c6fdbd8SKent Overstreet 21757edcfbfeSKent Overstreet inode_lock(&inode->v); 21767edcfbfeSKent Overstreet 21777edcfbfeSKent Overstreet ret = generic_write_checks(req, iter); 21787edcfbfeSKent Overstreet if (unlikely(ret <= 0)) 21797edcfbfeSKent Overstreet goto err; 21807edcfbfeSKent Overstreet 21817edcfbfeSKent Overstreet ret = file_remove_privs(file); 21827edcfbfeSKent Overstreet if (unlikely(ret)) 21837edcfbfeSKent Overstreet goto err; 21847edcfbfeSKent Overstreet 21857edcfbfeSKent Overstreet ret = file_update_time(file); 21867edcfbfeSKent Overstreet if (unlikely(ret)) 21877edcfbfeSKent Overstreet goto err; 21881c6fdbd8SKent Overstreet 2189919dbbd1SKent Overstreet if (unlikely((req->ki_pos|iter->count) & (block_bytes(c) - 1))) 21907edcfbfeSKent Overstreet goto err; 21917edcfbfeSKent Overstreet 21927edcfbfeSKent Overstreet inode_dio_begin(&inode->v); 21937edcfbfeSKent Overstreet bch2_pagecache_block_get(&inode->ei_pagecache_lock); 21947edcfbfeSKent Overstreet 21957edcfbfeSKent Overstreet extending = req->ki_pos + iter->count > inode->v.i_size; 21967edcfbfeSKent Overstreet if (!extending) { 21977edcfbfeSKent Overstreet inode_unlock(&inode->v); 21987edcfbfeSKent Overstreet locked = false; 21997edcfbfeSKent Overstreet } 22001c6fdbd8SKent Overstreet 22011c6fdbd8SKent Overstreet bio = bio_alloc_bioset(NULL, 22022ed5cd50SKent Overstreet iov_iter_is_bvec(iter) 22032ed5cd50SKent Overstreet ? 0 22042ed5cd50SKent Overstreet : iov_iter_npages(iter, BIO_MAX_VECS), 22051c6fdbd8SKent Overstreet REQ_OP_WRITE, 22061c6fdbd8SKent Overstreet GFP_KERNEL, 22071c6fdbd8SKent Overstreet &c->dio_write_bioset); 22089a3df993SKent Overstreet dio = container_of(bio, struct dio_write, op.wbio.bio); 2209f8f30863SKent Overstreet init_completion(&dio->done); 22101c6fdbd8SKent Overstreet dio->req = req; 2211ed484030SKent Overstreet dio->mm = current->mm; 22121c6fdbd8SKent Overstreet dio->loop = false; 22137edcfbfeSKent Overstreet dio->sync = is_sync_kiocb(req) || extending; 22141c6fdbd8SKent Overstreet dio->free_iov = false; 22151c6fdbd8SKent Overstreet dio->quota_res.sectors = 0; 2216042a1f26SKent Overstreet dio->written = 0; 22171c6fdbd8SKent Overstreet dio->iter = *iter; 22189a3df993SKent Overstreet 22191c6fdbd8SKent Overstreet ret = bch2_quota_reservation_add(c, inode, &dio->quota_res, 22201c6fdbd8SKent Overstreet iter->count >> 9, true); 22211c6fdbd8SKent Overstreet if (unlikely(ret)) 22227edcfbfeSKent Overstreet goto err_put_bio; 22231c6fdbd8SKent Overstreet 2224a023127aSKent Overstreet if (unlikely(mapping->nrpages)) { 222554847d25SKent Overstreet ret = write_invalidate_inode_pages_range(mapping, 222654847d25SKent Overstreet req->ki_pos, 222754847d25SKent Overstreet req->ki_pos + iter->count - 1); 222854847d25SKent Overstreet if (unlikely(ret)) 222954847d25SKent Overstreet goto err_put_bio; 2230a023127aSKent Overstreet } 223154847d25SKent Overstreet 22327edcfbfeSKent Overstreet ret = bch2_dio_write_loop(dio); 22331c6fdbd8SKent Overstreet err: 22347edcfbfeSKent Overstreet if (locked) 22357edcfbfeSKent Overstreet inode_unlock(&inode->v); 22367edcfbfeSKent Overstreet return ret; 22377edcfbfeSKent Overstreet err_put_bio: 22387edcfbfeSKent Overstreet bch2_pagecache_block_put(&inode->ei_pagecache_lock); 22391c6fdbd8SKent Overstreet bch2_quota_reservation_put(c, inode, &dio->quota_res); 22401c6fdbd8SKent Overstreet bio_put(bio); 22417edcfbfeSKent Overstreet inode_dio_end(&inode->v); 22427edcfbfeSKent Overstreet goto err; 22431c6fdbd8SKent Overstreet } 22441c6fdbd8SKent Overstreet 22457edcfbfeSKent Overstreet ssize_t bch2_write_iter(struct kiocb *iocb, struct iov_iter *from) 22461c6fdbd8SKent Overstreet { 22471c6fdbd8SKent Overstreet struct file *file = iocb->ki_filp; 22487edcfbfeSKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 22491c6fdbd8SKent Overstreet ssize_t ret; 22501c6fdbd8SKent Overstreet 22511c6fdbd8SKent Overstreet if (iocb->ki_flags & IOCB_DIRECT) 22521c6fdbd8SKent Overstreet return bch2_direct_write(iocb, from); 22531c6fdbd8SKent Overstreet 22547edcfbfeSKent Overstreet inode_lock(&inode->v); 22557edcfbfeSKent Overstreet 22567edcfbfeSKent Overstreet ret = generic_write_checks(iocb, from); 22577edcfbfeSKent Overstreet if (ret <= 0) 22587edcfbfeSKent Overstreet goto unlock; 22597edcfbfeSKent Overstreet 22601c6fdbd8SKent Overstreet ret = file_remove_privs(file); 22611c6fdbd8SKent Overstreet if (ret) 22627edcfbfeSKent Overstreet goto unlock; 22631c6fdbd8SKent Overstreet 22641c6fdbd8SKent Overstreet ret = file_update_time(file); 22651c6fdbd8SKent Overstreet if (ret) 22667edcfbfeSKent Overstreet goto unlock; 22671c6fdbd8SKent Overstreet 22687edcfbfeSKent Overstreet ret = bch2_buffered_write(iocb, from); 22691c6fdbd8SKent Overstreet if (likely(ret > 0)) 22701c6fdbd8SKent Overstreet iocb->ki_pos += ret; 22717edcfbfeSKent Overstreet unlock: 22721c6fdbd8SKent Overstreet inode_unlock(&inode->v); 22731c6fdbd8SKent Overstreet 22747edcfbfeSKent Overstreet if (ret > 0) 22751c6fdbd8SKent Overstreet ret = generic_write_sync(iocb, ret); 22761c6fdbd8SKent Overstreet 22771c6fdbd8SKent Overstreet return ret; 22781c6fdbd8SKent Overstreet } 22791c6fdbd8SKent Overstreet 22801c6fdbd8SKent Overstreet /* fsync: */ 22811c6fdbd8SKent Overstreet 228268a2054dSKent Overstreet /* 228368a2054dSKent Overstreet * inode->ei_inode.bi_journal_seq won't be up to date since it's set in an 228468a2054dSKent Overstreet * insert trigger: look up the btree inode instead 228568a2054dSKent Overstreet */ 228668a2054dSKent Overstreet static int bch2_flush_inode(struct bch_fs *c, subvol_inum inum) 228768a2054dSKent Overstreet { 228868a2054dSKent Overstreet struct bch_inode_unpacked inode; 228968a2054dSKent Overstreet int ret; 229068a2054dSKent Overstreet 229168a2054dSKent Overstreet if (c->opts.journal_flush_disabled) 229268a2054dSKent Overstreet return 0; 229368a2054dSKent Overstreet 229468a2054dSKent Overstreet ret = bch2_inode_find_by_inum(c, inum, &inode); 229568a2054dSKent Overstreet if (ret) 229668a2054dSKent Overstreet return ret; 229768a2054dSKent Overstreet 229868a2054dSKent Overstreet return bch2_journal_flush_seq(&c->journal, inode.bi_journal_seq); 229968a2054dSKent Overstreet } 230068a2054dSKent Overstreet 23011c6fdbd8SKent Overstreet int bch2_fsync(struct file *file, loff_t start, loff_t end, int datasync) 23021c6fdbd8SKent Overstreet { 23031c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 23041c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 230568a2054dSKent Overstreet int ret, ret2, ret3; 23061c6fdbd8SKent Overstreet 23071c6fdbd8SKent Overstreet ret = file_write_and_wait_range(file, start, end); 230868a2054dSKent Overstreet ret2 = sync_inode_metadata(&inode->v, 1); 230968a2054dSKent Overstreet ret3 = bch2_flush_inode(c, inode_inum(inode)); 23101c6fdbd8SKent Overstreet 231168a2054dSKent Overstreet return ret ?: ret2 ?: ret3; 23121c6fdbd8SKent Overstreet } 23131c6fdbd8SKent Overstreet 23141c6fdbd8SKent Overstreet /* truncate: */ 23151c6fdbd8SKent Overstreet 23166fed42bbSKent Overstreet static inline int range_has_data(struct bch_fs *c, u32 subvol, 23171c6fdbd8SKent Overstreet struct bpos start, 23181c6fdbd8SKent Overstreet struct bpos end) 23191c6fdbd8SKent Overstreet { 2320424eb881SKent Overstreet struct btree_trans trans; 232167e0dd8fSKent Overstreet struct btree_iter iter; 23221c6fdbd8SKent Overstreet struct bkey_s_c k; 23231c6fdbd8SKent Overstreet int ret = 0; 23241c6fdbd8SKent Overstreet 232520bceecbSKent Overstreet bch2_trans_init(&trans, c, 0, 0); 23266fed42bbSKent Overstreet retry: 23276fed42bbSKent Overstreet bch2_trans_begin(&trans); 23286fed42bbSKent Overstreet 23296fed42bbSKent Overstreet ret = bch2_subvolume_get_snapshot(&trans, subvol, &start.snapshot); 23306fed42bbSKent Overstreet if (ret) 23316fed42bbSKent Overstreet goto err; 2332424eb881SKent Overstreet 2333e5fa91d7SKent Overstreet for_each_btree_key_norestart(&trans, iter, BTREE_ID_extents, start, 0, k, ret) { 23341c6fdbd8SKent Overstreet if (bkey_cmp(bkey_start_pos(k.k), end) >= 0) 23351c6fdbd8SKent Overstreet break; 23361c6fdbd8SKent Overstreet 23371c6fdbd8SKent Overstreet if (bkey_extent_is_data(k.k)) { 23381c6fdbd8SKent Overstreet ret = 1; 23391c6fdbd8SKent Overstreet break; 23401c6fdbd8SKent Overstreet } 23411c6fdbd8SKent Overstreet } 23426fed42bbSKent Overstreet start = iter.pos; 234367e0dd8fSKent Overstreet bch2_trans_iter_exit(&trans, &iter); 23446fed42bbSKent Overstreet err: 23456fed42bbSKent Overstreet if (ret == -EINTR) 23466fed42bbSKent Overstreet goto retry; 23471c6fdbd8SKent Overstreet 23489a796fdbSKent Overstreet bch2_trans_exit(&trans); 23499a796fdbSKent Overstreet return ret; 23501c6fdbd8SKent Overstreet } 23511c6fdbd8SKent Overstreet 23521c6fdbd8SKent Overstreet static int __bch2_truncate_page(struct bch_inode_info *inode, 23531c6fdbd8SKent Overstreet pgoff_t index, loff_t start, loff_t end) 23541c6fdbd8SKent Overstreet { 23551c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 23561c6fdbd8SKent Overstreet struct address_space *mapping = inode->v.i_mapping; 2357a99b1cafSKent Overstreet struct bch_page_state *s; 23581c6fdbd8SKent Overstreet unsigned start_offset = start & (PAGE_SIZE - 1); 23591c6fdbd8SKent Overstreet unsigned end_offset = ((end - 1) & (PAGE_SIZE - 1)) + 1; 2360a99b1cafSKent Overstreet unsigned i; 23611c6fdbd8SKent Overstreet struct page *page; 2362b19d307dSKent Overstreet s64 i_sectors_delta = 0; 23631c6fdbd8SKent Overstreet int ret = 0; 23641c6fdbd8SKent Overstreet 23651c6fdbd8SKent Overstreet /* Page boundary? Nothing to do */ 23661c6fdbd8SKent Overstreet if (!((index == start >> PAGE_SHIFT && start_offset) || 23671c6fdbd8SKent Overstreet (index == end >> PAGE_SHIFT && end_offset != PAGE_SIZE))) 23681c6fdbd8SKent Overstreet return 0; 23691c6fdbd8SKent Overstreet 23701c6fdbd8SKent Overstreet /* Above i_size? */ 23711c6fdbd8SKent Overstreet if (index << PAGE_SHIFT >= inode->v.i_size) 23721c6fdbd8SKent Overstreet return 0; 23731c6fdbd8SKent Overstreet 23741c6fdbd8SKent Overstreet page = find_lock_page(mapping, index); 23751c6fdbd8SKent Overstreet if (!page) { 23761c6fdbd8SKent Overstreet /* 23771c6fdbd8SKent Overstreet * XXX: we're doing two index lookups when we end up reading the 23781c6fdbd8SKent Overstreet * page 23791c6fdbd8SKent Overstreet */ 23806fed42bbSKent Overstreet ret = range_has_data(c, inode->ei_subvol, 23817279c1a2SKent Overstreet POS(inode->v.i_ino, index << PAGE_SECTORS_SHIFT), 23827279c1a2SKent Overstreet POS(inode->v.i_ino, (index + 1) << PAGE_SECTORS_SHIFT)); 23831c6fdbd8SKent Overstreet if (ret <= 0) 23841c6fdbd8SKent Overstreet return ret; 23851c6fdbd8SKent Overstreet 23861c6fdbd8SKent Overstreet page = find_or_create_page(mapping, index, GFP_KERNEL); 23871c6fdbd8SKent Overstreet if (unlikely(!page)) { 23881c6fdbd8SKent Overstreet ret = -ENOMEM; 23891c6fdbd8SKent Overstreet goto out; 23901c6fdbd8SKent Overstreet } 23911c6fdbd8SKent Overstreet } 23921c6fdbd8SKent Overstreet 2393a99b1cafSKent Overstreet s = bch2_page_state_create(page, 0); 2394a99b1cafSKent Overstreet if (!s) { 2395a99b1cafSKent Overstreet ret = -ENOMEM; 2396a99b1cafSKent Overstreet goto unlock; 2397a99b1cafSKent Overstreet } 2398a99b1cafSKent Overstreet 23991c6fdbd8SKent Overstreet if (!PageUptodate(page)) { 24001c6fdbd8SKent Overstreet ret = bch2_read_single_page(page, mapping); 24011c6fdbd8SKent Overstreet if (ret) 24021c6fdbd8SKent Overstreet goto unlock; 24031c6fdbd8SKent Overstreet } 24041c6fdbd8SKent Overstreet 2405a99b1cafSKent Overstreet if (index != start >> PAGE_SHIFT) 2406a99b1cafSKent Overstreet start_offset = 0; 2407a99b1cafSKent Overstreet if (index != end >> PAGE_SHIFT) 2408a99b1cafSKent Overstreet end_offset = PAGE_SIZE; 2409a99b1cafSKent Overstreet 2410a99b1cafSKent Overstreet for (i = round_up(start_offset, block_bytes(c)) >> 9; 2411a99b1cafSKent Overstreet i < round_down(end_offset, block_bytes(c)) >> 9; 2412a99b1cafSKent Overstreet i++) { 2413a99b1cafSKent Overstreet s->s[i].nr_replicas = 0; 2414b19d307dSKent Overstreet if (s->s[i].state == SECTOR_DIRTY) 2415b19d307dSKent Overstreet i_sectors_delta--; 2416a99b1cafSKent Overstreet s->s[i].state = SECTOR_UNALLOCATED; 2417a99b1cafSKent Overstreet } 2418a99b1cafSKent Overstreet 2419b19d307dSKent Overstreet i_sectors_acct(c, inode, NULL, i_sectors_delta); 2420b19d307dSKent Overstreet 242174163da7SKent Overstreet /* 242274163da7SKent Overstreet * Caller needs to know whether this page will be written out by 242374163da7SKent Overstreet * writeback - doing an i_size update if necessary - or whether it will 242474163da7SKent Overstreet * be responsible for the i_size update: 242574163da7SKent Overstreet */ 242674163da7SKent Overstreet ret = s->s[(min_t(u64, inode->v.i_size - (index << PAGE_SHIFT), 242774163da7SKent Overstreet PAGE_SIZE) - 1) >> 9].state >= SECTOR_DIRTY; 242874163da7SKent Overstreet 2429a99b1cafSKent Overstreet zero_user_segment(page, start_offset, end_offset); 2430a99b1cafSKent Overstreet 24311c6fdbd8SKent Overstreet /* 24321c6fdbd8SKent Overstreet * Bit of a hack - we don't want truncate to fail due to -ENOSPC. 24331c6fdbd8SKent Overstreet * 24341c6fdbd8SKent Overstreet * XXX: because we aren't currently tracking whether the page has actual 24351c6fdbd8SKent Overstreet * data in it (vs. just 0s, or only partially written) this wrong. ick. 24361c6fdbd8SKent Overstreet */ 243774163da7SKent Overstreet BUG_ON(bch2_get_page_disk_reservation(c, inode, page, false)); 24381c6fdbd8SKent Overstreet 24399ba2eb25SKent Overstreet /* 24409ba2eb25SKent Overstreet * This removes any writeable userspace mappings; we need to force 24419ba2eb25SKent Overstreet * .page_mkwrite to be called again before any mmapped writes, to 24429ba2eb25SKent Overstreet * redirty the full page: 24439ba2eb25SKent Overstreet */ 24449ba2eb25SKent Overstreet page_mkclean(page); 2445d1542e03SKent Overstreet filemap_dirty_folio(mapping, page_folio(page)); 24461c6fdbd8SKent Overstreet unlock: 24471c6fdbd8SKent Overstreet unlock_page(page); 24481c6fdbd8SKent Overstreet put_page(page); 24491c6fdbd8SKent Overstreet out: 24501c6fdbd8SKent Overstreet return ret; 24511c6fdbd8SKent Overstreet } 24521c6fdbd8SKent Overstreet 24531c6fdbd8SKent Overstreet static int bch2_truncate_page(struct bch_inode_info *inode, loff_t from) 24541c6fdbd8SKent Overstreet { 24551c6fdbd8SKent Overstreet return __bch2_truncate_page(inode, from >> PAGE_SHIFT, 2456a99b1cafSKent Overstreet from, round_up(from, PAGE_SIZE)); 24571c6fdbd8SKent Overstreet } 24581c6fdbd8SKent Overstreet 245974163da7SKent Overstreet static int bch2_truncate_pages(struct bch_inode_info *inode, 246074163da7SKent Overstreet loff_t start, loff_t end) 246174163da7SKent Overstreet { 246274163da7SKent Overstreet int ret = __bch2_truncate_page(inode, start >> PAGE_SHIFT, 246374163da7SKent Overstreet start, end); 246474163da7SKent Overstreet 246574163da7SKent Overstreet if (ret >= 0 && 246674163da7SKent Overstreet start >> PAGE_SHIFT != end >> PAGE_SHIFT) 246774163da7SKent Overstreet ret = __bch2_truncate_page(inode, 246874163da7SKent Overstreet end >> PAGE_SHIFT, 246974163da7SKent Overstreet start, end); 247074163da7SKent Overstreet return ret; 247174163da7SKent Overstreet } 247274163da7SKent Overstreet 247368a507a2SKent Overstreet static int bch2_extend(struct mnt_idmap *idmap, 247468a507a2SKent Overstreet struct bch_inode_info *inode, 2475e0541a93SKent Overstreet struct bch_inode_unpacked *inode_u, 2476e0541a93SKent Overstreet struct iattr *iattr) 24771c6fdbd8SKent Overstreet { 24781c6fdbd8SKent Overstreet struct address_space *mapping = inode->v.i_mapping; 24791c6fdbd8SKent Overstreet int ret; 24801c6fdbd8SKent Overstreet 2481e0541a93SKent Overstreet /* 2482e0541a93SKent Overstreet * sync appends: 24832925fc49SKent Overstreet * 24842925fc49SKent Overstreet * this has to be done _before_ extending i_size: 2485e0541a93SKent Overstreet */ 2486e0541a93SKent Overstreet ret = filemap_write_and_wait_range(mapping, inode_u->bi_size, S64_MAX); 24871c6fdbd8SKent Overstreet if (ret) 24881c6fdbd8SKent Overstreet return ret; 24891c6fdbd8SKent Overstreet 24901c6fdbd8SKent Overstreet truncate_setsize(&inode->v, iattr->ia_size); 24911c6fdbd8SKent Overstreet 249268a507a2SKent Overstreet return bch2_setattr_nonsize(idmap, inode, iattr); 24931c6fdbd8SKent Overstreet } 24941c6fdbd8SKent Overstreet 249554e2264eSKent Overstreet static int bch2_truncate_finish_fn(struct bch_inode_info *inode, 249654e2264eSKent Overstreet struct bch_inode_unpacked *bi, 249754e2264eSKent Overstreet void *p) 249854e2264eSKent Overstreet { 249954e2264eSKent Overstreet bi->bi_flags &= ~BCH_INODE_I_SIZE_DIRTY; 250054e2264eSKent Overstreet return 0; 250154e2264eSKent Overstreet } 250254e2264eSKent Overstreet 250354e2264eSKent Overstreet static int bch2_truncate_start_fn(struct bch_inode_info *inode, 250454e2264eSKent Overstreet struct bch_inode_unpacked *bi, void *p) 250554e2264eSKent Overstreet { 250654e2264eSKent Overstreet u64 *new_i_size = p; 250754e2264eSKent Overstreet 250854e2264eSKent Overstreet bi->bi_flags |= BCH_INODE_I_SIZE_DIRTY; 250954e2264eSKent Overstreet bi->bi_size = *new_i_size; 251054e2264eSKent Overstreet return 0; 251154e2264eSKent Overstreet } 251254e2264eSKent Overstreet 251368a507a2SKent Overstreet int bch2_truncate(struct mnt_idmap *idmap, 251468a507a2SKent Overstreet struct bch_inode_info *inode, struct iattr *iattr) 25151c6fdbd8SKent Overstreet { 25161c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 25171c6fdbd8SKent Overstreet struct address_space *mapping = inode->v.i_mapping; 2518e0541a93SKent Overstreet struct bch_inode_unpacked inode_u; 251954e2264eSKent Overstreet u64 new_i_size = iattr->ia_size; 25202e87eae1SKent Overstreet s64 i_sectors_delta = 0; 25211c6fdbd8SKent Overstreet int ret = 0; 25221c6fdbd8SKent Overstreet 252368a507a2SKent Overstreet /* 252478d66ab1SDan Robertson * If the truncate call with change the size of the file, the 252578d66ab1SDan Robertson * cmtimes should be updated. If the size will not change, we 252678d66ab1SDan Robertson * do not need to update the cmtimes. 252768a507a2SKent Overstreet */ 252878d66ab1SDan Robertson if (iattr->ia_size != inode->v.i_size) { 252968a507a2SKent Overstreet if (!(iattr->ia_valid & ATTR_MTIME)) 253068a507a2SKent Overstreet ktime_get_coarse_real_ts64(&iattr->ia_mtime); 253168a507a2SKent Overstreet if (!(iattr->ia_valid & ATTR_CTIME)) 253268a507a2SKent Overstreet ktime_get_coarse_real_ts64(&iattr->ia_ctime); 253368a507a2SKent Overstreet iattr->ia_valid |= ATTR_MTIME|ATTR_CTIME; 253478d66ab1SDan Robertson } 253568a507a2SKent Overstreet 25361c6fdbd8SKent Overstreet inode_dio_wait(&inode->v); 25371c6fdbd8SKent Overstreet bch2_pagecache_block_get(&inode->ei_pagecache_lock); 25381c6fdbd8SKent Overstreet 25396fed42bbSKent Overstreet ret = bch2_inode_find_by_inum(c, inode_inum(inode), &inode_u); 2540e0541a93SKent Overstreet if (ret) 2541e0541a93SKent Overstreet goto err; 25421c6fdbd8SKent Overstreet 2543c45d473dSKent Overstreet /* 2544c45d473dSKent Overstreet * check this before next assertion; on filesystem error our normal 2545c45d473dSKent Overstreet * invariants are a bit broken (truncate has to truncate the page cache 2546c45d473dSKent Overstreet * before the inode). 2547c45d473dSKent Overstreet */ 2548c45d473dSKent Overstreet ret = bch2_journal_error(&c->journal); 2549c45d473dSKent Overstreet if (ret) 2550c45d473dSKent Overstreet goto err; 2551c45d473dSKent Overstreet 255233c74e41SKent Overstreet WARN_ON(!test_bit(EI_INODE_ERROR, &inode->ei_flags) && 255333c74e41SKent Overstreet inode->v.i_size < inode_u.bi_size); 2554e0541a93SKent Overstreet 2555e0541a93SKent Overstreet if (iattr->ia_size > inode->v.i_size) { 255668a507a2SKent Overstreet ret = bch2_extend(idmap, inode, &inode_u, iattr); 255754e2264eSKent Overstreet goto err; 25581c6fdbd8SKent Overstreet } 25591c6fdbd8SKent Overstreet 256068a507a2SKent Overstreet iattr->ia_valid &= ~ATTR_SIZE; 256168a507a2SKent Overstreet 25621c6fdbd8SKent Overstreet ret = bch2_truncate_page(inode, iattr->ia_size); 256374163da7SKent Overstreet if (unlikely(ret < 0)) 256454e2264eSKent Overstreet goto err; 25651c6fdbd8SKent Overstreet 25666cc3535dSKent Overstreet /* 25676cc3535dSKent Overstreet * When extending, we're going to write the new i_size to disk 25686cc3535dSKent Overstreet * immediately so we need to flush anything above the current on disk 25696cc3535dSKent Overstreet * i_size first: 25706cc3535dSKent Overstreet * 25716cc3535dSKent Overstreet * Also, when extending we need to flush the page that i_size currently 25726cc3535dSKent Overstreet * straddles - if it's mapped to userspace, we need to ensure that 25736cc3535dSKent Overstreet * userspace has to redirty it and call .mkwrite -> set_page_dirty 25746cc3535dSKent Overstreet * again to allocate the part of the page that was extended. 25756cc3535dSKent Overstreet */ 2576e0541a93SKent Overstreet if (iattr->ia_size > inode_u.bi_size) 25771c6fdbd8SKent Overstreet ret = filemap_write_and_wait_range(mapping, 2578e0541a93SKent Overstreet inode_u.bi_size, 25791c6fdbd8SKent Overstreet iattr->ia_size - 1); 25801c6fdbd8SKent Overstreet else if (iattr->ia_size & (PAGE_SIZE - 1)) 25811c6fdbd8SKent Overstreet ret = filemap_write_and_wait_range(mapping, 25821c6fdbd8SKent Overstreet round_down(iattr->ia_size, PAGE_SIZE), 25831c6fdbd8SKent Overstreet iattr->ia_size - 1); 25841c6fdbd8SKent Overstreet if (ret) 258554e2264eSKent Overstreet goto err; 25861c6fdbd8SKent Overstreet 258754e2264eSKent Overstreet mutex_lock(&inode->ei_update_lock); 258854e2264eSKent Overstreet ret = bch2_write_inode(c, inode, bch2_truncate_start_fn, 258954e2264eSKent Overstreet &new_i_size, 0); 259054e2264eSKent Overstreet mutex_unlock(&inode->ei_update_lock); 25911c6fdbd8SKent Overstreet 25921c6fdbd8SKent Overstreet if (unlikely(ret)) 259354e2264eSKent Overstreet goto err; 25941c6fdbd8SKent Overstreet 25951c6fdbd8SKent Overstreet truncate_setsize(&inode->v, iattr->ia_size); 25961c6fdbd8SKent Overstreet 25978c6d298aSKent Overstreet ret = bch2_fpunch(c, inode_inum(inode), 2598a99b1cafSKent Overstreet round_up(iattr->ia_size, block_bytes(c)) >> 9, 259968a2054dSKent Overstreet U64_MAX, &i_sectors_delta); 26002e87eae1SKent Overstreet i_sectors_acct(c, inode, NULL, i_sectors_delta); 26012e87eae1SKent Overstreet 26021c6fdbd8SKent Overstreet if (unlikely(ret)) 260354e2264eSKent Overstreet goto err; 26041c6fdbd8SKent Overstreet 260554e2264eSKent Overstreet mutex_lock(&inode->ei_update_lock); 260668a507a2SKent Overstreet ret = bch2_write_inode(c, inode, bch2_truncate_finish_fn, NULL, 0); 260754e2264eSKent Overstreet mutex_unlock(&inode->ei_update_lock); 260868a507a2SKent Overstreet 260968a507a2SKent Overstreet ret = bch2_setattr_nonsize(idmap, inode, iattr); 261054e2264eSKent Overstreet err: 26111c6fdbd8SKent Overstreet bch2_pagecache_block_put(&inode->ei_pagecache_lock); 26121c6fdbd8SKent Overstreet return ret; 26131c6fdbd8SKent Overstreet } 26141c6fdbd8SKent Overstreet 26151c6fdbd8SKent Overstreet /* fallocate: */ 26161c6fdbd8SKent Overstreet 2617050197b1SKent Overstreet static int inode_update_times_fn(struct bch_inode_info *inode, 2618050197b1SKent Overstreet struct bch_inode_unpacked *bi, void *p) 2619050197b1SKent Overstreet { 2620050197b1SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 2621050197b1SKent Overstreet 2622050197b1SKent Overstreet bi->bi_mtime = bi->bi_ctime = bch2_current_time(c); 2623050197b1SKent Overstreet return 0; 2624050197b1SKent Overstreet } 2625050197b1SKent Overstreet 26262e87eae1SKent Overstreet static long bchfs_fpunch(struct bch_inode_info *inode, loff_t offset, loff_t len) 26271c6fdbd8SKent Overstreet { 26281c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 262974163da7SKent Overstreet u64 end = offset + len; 263074163da7SKent Overstreet u64 block_start = round_up(offset, block_bytes(c)); 263174163da7SKent Overstreet u64 block_end = round_down(end, block_bytes(c)); 263274163da7SKent Overstreet bool truncated_last_page; 26331c6fdbd8SKent Overstreet int ret = 0; 26341c6fdbd8SKent Overstreet 263574163da7SKent Overstreet ret = bch2_truncate_pages(inode, offset, end); 263674163da7SKent Overstreet if (unlikely(ret < 0)) 26371c6fdbd8SKent Overstreet goto err; 26381c6fdbd8SKent Overstreet 263974163da7SKent Overstreet truncated_last_page = ret; 26401c6fdbd8SKent Overstreet 264174163da7SKent Overstreet truncate_pagecache_range(&inode->v, offset, end - 1); 26421c6fdbd8SKent Overstreet 264374163da7SKent Overstreet if (block_start < block_end ) { 26442e87eae1SKent Overstreet s64 i_sectors_delta = 0; 26452e87eae1SKent Overstreet 26468c6d298aSKent Overstreet ret = bch2_fpunch(c, inode_inum(inode), 264774163da7SKent Overstreet block_start >> 9, block_end >> 9, 26482e87eae1SKent Overstreet &i_sectors_delta); 26492e87eae1SKent Overstreet i_sectors_acct(c, inode, NULL, i_sectors_delta); 26502e87eae1SKent Overstreet } 2651050197b1SKent Overstreet 2652050197b1SKent Overstreet mutex_lock(&inode->ei_update_lock); 265374163da7SKent Overstreet if (end >= inode->v.i_size && !truncated_last_page) { 265474163da7SKent Overstreet ret = bch2_write_inode_size(c, inode, inode->v.i_size, 265574163da7SKent Overstreet ATTR_MTIME|ATTR_CTIME); 265674163da7SKent Overstreet } else { 2657050197b1SKent Overstreet ret = bch2_write_inode(c, inode, inode_update_times_fn, NULL, 265874163da7SKent Overstreet ATTR_MTIME|ATTR_CTIME); 265974163da7SKent Overstreet } 2660050197b1SKent Overstreet mutex_unlock(&inode->ei_update_lock); 26611c6fdbd8SKent Overstreet err: 26621c6fdbd8SKent Overstreet return ret; 26631c6fdbd8SKent Overstreet } 26641c6fdbd8SKent Overstreet 26652e87eae1SKent Overstreet static long bchfs_fcollapse_finsert(struct bch_inode_info *inode, 26665f786787SKent Overstreet loff_t offset, loff_t len, 26675f786787SKent Overstreet bool insert) 26681c6fdbd8SKent Overstreet { 26691c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 26701c6fdbd8SKent Overstreet struct address_space *mapping = inode->v.i_mapping; 267107a1006aSKent Overstreet struct bkey_buf copy; 2672d69f41d6SKent Overstreet struct btree_trans trans; 267367e0dd8fSKent Overstreet struct btree_iter src, dst, del; 26745f786787SKent Overstreet loff_t shift, new_size; 26755f786787SKent Overstreet u64 src_start; 267650dc0f69SKent Overstreet int ret = 0; 26771c6fdbd8SKent Overstreet 26781c6fdbd8SKent Overstreet if ((offset | len) & (block_bytes(c) - 1)) 26791c6fdbd8SKent Overstreet return -EINVAL; 26801c6fdbd8SKent Overstreet 26815f786787SKent Overstreet if (insert) { 26825f786787SKent Overstreet if (inode->v.i_sb->s_maxbytes - inode->v.i_size < len) 268374163da7SKent Overstreet return -EFBIG; 26845f786787SKent Overstreet 26855f786787SKent Overstreet if (offset >= inode->v.i_size) 268674163da7SKent Overstreet return -EINVAL; 26875f786787SKent Overstreet 26885f786787SKent Overstreet src_start = U64_MAX; 26895f786787SKent Overstreet shift = len; 26905f786787SKent Overstreet } else { 26911c6fdbd8SKent Overstreet if (offset + len >= inode->v.i_size) 269274163da7SKent Overstreet return -EINVAL; 26931c6fdbd8SKent Overstreet 26945f786787SKent Overstreet src_start = offset + len; 26955f786787SKent Overstreet shift = -len; 26965f786787SKent Overstreet } 26971c6fdbd8SKent Overstreet 26985f786787SKent Overstreet new_size = inode->v.i_size + shift; 26991c6fdbd8SKent Overstreet 27001c6fdbd8SKent Overstreet ret = write_invalidate_inode_pages_range(mapping, offset, LLONG_MAX); 27011c6fdbd8SKent Overstreet if (ret) 270274163da7SKent Overstreet return ret; 27031c6fdbd8SKent Overstreet 27045f786787SKent Overstreet if (insert) { 27055f786787SKent Overstreet i_size_write(&inode->v, new_size); 27065f786787SKent Overstreet mutex_lock(&inode->ei_update_lock); 27075f786787SKent Overstreet ret = bch2_write_inode_size(c, inode, new_size, 27085f786787SKent Overstreet ATTR_MTIME|ATTR_CTIME); 27095f786787SKent Overstreet mutex_unlock(&inode->ei_update_lock); 27105f786787SKent Overstreet } else { 27112e87eae1SKent Overstreet s64 i_sectors_delta = 0; 27122e87eae1SKent Overstreet 27138c6d298aSKent Overstreet ret = bch2_fpunch(c, inode_inum(inode), 27142e87eae1SKent Overstreet offset >> 9, (offset + len) >> 9, 27152e87eae1SKent Overstreet &i_sectors_delta); 27162e87eae1SKent Overstreet i_sectors_acct(c, inode, NULL, i_sectors_delta); 27172e87eae1SKent Overstreet 271863095894SKent Overstreet if (ret) 271974163da7SKent Overstreet return ret; 27205f786787SKent Overstreet } 27218ef231bdSKent Overstreet 272250dc0f69SKent Overstreet bch2_bkey_buf_init(©); 2723f7beb4caSKent Overstreet bch2_trans_init(&trans, c, BTREE_ITER_MAX, 1024); 272467e0dd8fSKent Overstreet bch2_trans_iter_init(&trans, &src, BTREE_ID_extents, 27255f786787SKent Overstreet POS(inode->v.i_ino, src_start >> 9), 272663095894SKent Overstreet BTREE_ITER_INTENT); 272767e0dd8fSKent Overstreet bch2_trans_copy_iter(&dst, &src); 272867e0dd8fSKent Overstreet bch2_trans_copy_iter(&del, &src); 27295f786787SKent Overstreet 273050dc0f69SKent Overstreet while (ret == 0 || ret == -EINTR) { 273163095894SKent Overstreet struct disk_reservation disk_res = 273263095894SKent Overstreet bch2_disk_reservation_init(c, 0); 273363095894SKent Overstreet struct bkey_i delete; 273463095894SKent Overstreet struct bkey_s_c k; 273563095894SKent Overstreet struct bpos next_pos; 27365f786787SKent Overstreet struct bpos move_pos = POS(inode->v.i_ino, offset >> 9); 27375f786787SKent Overstreet struct bpos atomic_end; 27382d594dfbSKent Overstreet unsigned trigger_flags = 0; 27396fed42bbSKent Overstreet u32 snapshot; 27406fed42bbSKent Overstreet 27416fed42bbSKent Overstreet bch2_trans_begin(&trans); 27426fed42bbSKent Overstreet 27436fed42bbSKent Overstreet ret = bch2_subvolume_get_snapshot(&trans, 27446fed42bbSKent Overstreet inode->ei_subvol, &snapshot); 27456fed42bbSKent Overstreet if (ret) 27466fed42bbSKent Overstreet continue; 27476fed42bbSKent Overstreet 27486fed42bbSKent Overstreet bch2_btree_iter_set_snapshot(&src, snapshot); 27496fed42bbSKent Overstreet bch2_btree_iter_set_snapshot(&dst, snapshot); 27506fed42bbSKent Overstreet bch2_btree_iter_set_snapshot(&del, snapshot); 275163095894SKent Overstreet 2752700c25b3SKent Overstreet bch2_trans_begin(&trans); 2753700c25b3SKent Overstreet 27545f786787SKent Overstreet k = insert 275567e0dd8fSKent Overstreet ? bch2_btree_iter_peek_prev(&src) 275667e0dd8fSKent Overstreet : bch2_btree_iter_peek(&src); 275763095894SKent Overstreet if ((ret = bkey_err(k))) 275850dc0f69SKent Overstreet continue; 275963095894SKent Overstreet 276063095894SKent Overstreet if (!k.k || k.k->p.inode != inode->v.i_ino) 276163095894SKent Overstreet break; 276263095894SKent Overstreet 27635f786787SKent Overstreet if (insert && 27645f786787SKent Overstreet bkey_cmp(k.k->p, POS(inode->v.i_ino, offset >> 9)) <= 0) 27655f786787SKent Overstreet break; 27665f786787SKent Overstreet reassemble: 276707a1006aSKent Overstreet bch2_bkey_buf_reassemble(©, c, k); 27685f786787SKent Overstreet 27695f786787SKent Overstreet if (insert && 2770283eda57SKent Overstreet bkey_cmp(bkey_start_pos(k.k), move_pos) < 0) 277135189e09SKent Overstreet bch2_cut_front(move_pos, copy.k); 27725f786787SKent Overstreet 277335189e09SKent Overstreet copy.k->k.p.offset += shift >> 9; 277467e0dd8fSKent Overstreet bch2_btree_iter_set_pos(&dst, bkey_start_pos(©.k->k)); 27751c6fdbd8SKent Overstreet 277667e0dd8fSKent Overstreet ret = bch2_extent_atomic_end(&trans, &dst, copy.k, &atomic_end); 27773c7f3b7aSKent Overstreet if (ret) 277850dc0f69SKent Overstreet continue; 2779e2d9912cSKent Overstreet 278035189e09SKent Overstreet if (bkey_cmp(atomic_end, copy.k->k.p)) { 27815f786787SKent Overstreet if (insert) { 27825f786787SKent Overstreet move_pos = atomic_end; 27835f786787SKent Overstreet move_pos.offset -= shift >> 9; 27845f786787SKent Overstreet goto reassemble; 27855f786787SKent Overstreet } else { 2786085ab693SKent Overstreet bch2_cut_back(atomic_end, copy.k); 27875f786787SKent Overstreet } 27885f786787SKent Overstreet } 27895f786787SKent Overstreet 279063095894SKent Overstreet bkey_init(&delete.k); 2791283eda57SKent Overstreet delete.k.p = copy.k->k.p; 2792283eda57SKent Overstreet delete.k.size = copy.k->k.size; 2793283eda57SKent Overstreet delete.k.p.offset -= shift >> 9; 279467e0dd8fSKent Overstreet bch2_btree_iter_set_pos(&del, bkey_start_pos(&delete.k)); 27951c6fdbd8SKent Overstreet 27965f786787SKent Overstreet next_pos = insert ? bkey_start_pos(&delete.k) : delete.k.p; 279763095894SKent Overstreet 279835189e09SKent Overstreet if (copy.k->k.size == k.k->size) { 279963095894SKent Overstreet /* 280063095894SKent Overstreet * If we're moving the entire extent, we can skip 280163095894SKent Overstreet * running triggers: 280263095894SKent Overstreet */ 28032d594dfbSKent Overstreet trigger_flags |= BTREE_TRIGGER_NORUN; 280463095894SKent Overstreet } else { 280563095894SKent Overstreet /* We might end up splitting compressed extents: */ 280663095894SKent Overstreet unsigned nr_ptrs = 28074de77495SKent Overstreet bch2_bkey_nr_ptrs_allocated(bkey_i_to_s_c(copy.k)); 280863095894SKent Overstreet 280963095894SKent Overstreet ret = bch2_disk_reservation_get(c, &disk_res, 281035189e09SKent Overstreet copy.k->k.size, nr_ptrs, 28111c6fdbd8SKent Overstreet BCH_DISK_RESERVATION_NOFAIL); 28121c6fdbd8SKent Overstreet BUG_ON(ret); 281363095894SKent Overstreet } 28141c6fdbd8SKent Overstreet 281567e0dd8fSKent Overstreet ret = bch2_btree_iter_traverse(&del) ?: 281667e0dd8fSKent Overstreet bch2_trans_update(&trans, &del, &delete, trigger_flags) ?: 281767e0dd8fSKent Overstreet bch2_trans_update(&trans, &dst, copy.k, trigger_flags) ?: 281868a2054dSKent Overstreet bch2_trans_commit(&trans, &disk_res, NULL, 28192d594dfbSKent Overstreet BTREE_INSERT_NOFAIL); 28201c6fdbd8SKent Overstreet bch2_disk_reservation_put(c, &disk_res); 282150dc0f69SKent Overstreet 282263095894SKent Overstreet if (!ret) 282367e0dd8fSKent Overstreet bch2_btree_iter_set_pos(&src, next_pos); 282450dc0f69SKent Overstreet } 282567e0dd8fSKent Overstreet bch2_trans_iter_exit(&trans, &del); 282667e0dd8fSKent Overstreet bch2_trans_iter_exit(&trans, &dst); 282767e0dd8fSKent Overstreet bch2_trans_iter_exit(&trans, &src); 282850dc0f69SKent Overstreet bch2_trans_exit(&trans); 282950dc0f69SKent Overstreet bch2_bkey_buf_exit(©, c); 283063095894SKent Overstreet 28318ef231bdSKent Overstreet if (ret) 283274163da7SKent Overstreet return ret; 28331c6fdbd8SKent Overstreet 283474163da7SKent Overstreet mutex_lock(&inode->ei_update_lock); 28355f786787SKent Overstreet if (!insert) { 28368ef231bdSKent Overstreet i_size_write(&inode->v, new_size); 28378ef231bdSKent Overstreet ret = bch2_write_inode_size(c, inode, new_size, 28388ef231bdSKent Overstreet ATTR_MTIME|ATTR_CTIME); 283974163da7SKent Overstreet } else { 284074163da7SKent Overstreet /* We need an inode update to update bi_journal_seq for fsync: */ 284174163da7SKent Overstreet ret = bch2_write_inode(c, inode, inode_update_times_fn, NULL, 284274163da7SKent Overstreet ATTR_MTIME|ATTR_CTIME); 28435f786787SKent Overstreet } 284474163da7SKent Overstreet mutex_unlock(&inode->ei_update_lock); 28451c6fdbd8SKent Overstreet return ret; 28461c6fdbd8SKent Overstreet } 28471c6fdbd8SKent Overstreet 2848694015c2SKent Overstreet static int __bchfs_fallocate(struct bch_inode_info *inode, int mode, 2849694015c2SKent Overstreet u64 start_sector, u64 end_sector) 28501c6fdbd8SKent Overstreet { 28511c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 2852190fa7afSKent Overstreet struct btree_trans trans; 285367e0dd8fSKent Overstreet struct btree_iter iter; 2854694015c2SKent Overstreet struct bpos end_pos = POS(inode->v.i_ino, end_sector); 28559a3df993SKent Overstreet unsigned replicas = io_opts(c, &inode->ei_inode).data_replicas; 2856694015c2SKent Overstreet int ret = 0; 28571c6fdbd8SKent Overstreet 2858f7beb4caSKent Overstreet bch2_trans_init(&trans, c, BTREE_ITER_MAX, 512); 28591c6fdbd8SKent Overstreet 286067e0dd8fSKent Overstreet bch2_trans_iter_init(&trans, &iter, BTREE_ID_extents, 2861694015c2SKent Overstreet POS(inode->v.i_ino, start_sector), 2862190fa7afSKent Overstreet BTREE_ITER_SLOTS|BTREE_ITER_INTENT); 28631c6fdbd8SKent Overstreet 286467e0dd8fSKent Overstreet while (!ret && bkey_cmp(iter.pos, end_pos) < 0) { 28652e87eae1SKent Overstreet s64 i_sectors_delta = 0; 28661c6fdbd8SKent Overstreet struct disk_reservation disk_res = { 0 }; 2867190fa7afSKent Overstreet struct quota_res quota_res = { 0 }; 28681c6fdbd8SKent Overstreet struct bkey_i_reservation reservation; 28691c6fdbd8SKent Overstreet struct bkey_s_c k; 2870694015c2SKent Overstreet unsigned sectors; 28716fed42bbSKent Overstreet u32 snapshot; 28721c6fdbd8SKent Overstreet 2873163e885aSKent Overstreet bch2_trans_begin(&trans); 2874a8abd3a7SKent Overstreet 28756fed42bbSKent Overstreet ret = bch2_subvolume_get_snapshot(&trans, 28766fed42bbSKent Overstreet inode->ei_subvol, &snapshot); 28776fed42bbSKent Overstreet if (ret) 28786fed42bbSKent Overstreet goto bkey_err; 28796fed42bbSKent Overstreet 28806fed42bbSKent Overstreet bch2_btree_iter_set_snapshot(&iter, snapshot); 28816fed42bbSKent Overstreet 288267e0dd8fSKent Overstreet k = bch2_btree_iter_peek_slot(&iter); 28830f238367SKent Overstreet if ((ret = bkey_err(k))) 28840f238367SKent Overstreet goto bkey_err; 28851c6fdbd8SKent Overstreet 28861c6fdbd8SKent Overstreet /* already reserved */ 288726609b61SKent Overstreet if (k.k->type == KEY_TYPE_reservation && 28881c6fdbd8SKent Overstreet bkey_s_c_to_reservation(k).v->nr_replicas >= replicas) { 288967e0dd8fSKent Overstreet bch2_btree_iter_advance(&iter); 28901c6fdbd8SKent Overstreet continue; 28911c6fdbd8SKent Overstreet } 28921c6fdbd8SKent Overstreet 2893190fa7afSKent Overstreet if (bkey_extent_is_data(k.k) && 2894190fa7afSKent Overstreet !(mode & FALLOC_FL_ZERO_RANGE)) { 289567e0dd8fSKent Overstreet bch2_btree_iter_advance(&iter); 28961c6fdbd8SKent Overstreet continue; 28971c6fdbd8SKent Overstreet } 28981c6fdbd8SKent Overstreet 28991c6fdbd8SKent Overstreet bkey_reservation_init(&reservation.k_i); 290026609b61SKent Overstreet reservation.k.type = KEY_TYPE_reservation; 29011c6fdbd8SKent Overstreet reservation.k.p = k.k->p; 29021c6fdbd8SKent Overstreet reservation.k.size = k.k->size; 29031c6fdbd8SKent Overstreet 290467e0dd8fSKent Overstreet bch2_cut_front(iter.pos, &reservation.k_i); 2905085ab693SKent Overstreet bch2_cut_back(end_pos, &reservation.k_i); 29061c6fdbd8SKent Overstreet 29071c6fdbd8SKent Overstreet sectors = reservation.k.size; 29084de77495SKent Overstreet reservation.v.nr_replicas = bch2_bkey_nr_ptrs_allocated(k); 29091c6fdbd8SKent Overstreet 29101c6fdbd8SKent Overstreet if (!bkey_extent_is_allocation(k.k)) { 29111c6fdbd8SKent Overstreet ret = bch2_quota_reservation_add(c, inode, 2912190fa7afSKent Overstreet "a_res, 29131c6fdbd8SKent Overstreet sectors, true); 29141c6fdbd8SKent Overstreet if (unlikely(ret)) 29150f238367SKent Overstreet goto bkey_err; 29161c6fdbd8SKent Overstreet } 29171c6fdbd8SKent Overstreet 29181c6fdbd8SKent Overstreet if (reservation.v.nr_replicas < replicas || 29194de77495SKent Overstreet bch2_bkey_sectors_compressed(k)) { 29201c6fdbd8SKent Overstreet ret = bch2_disk_reservation_get(c, &disk_res, sectors, 29211c6fdbd8SKent Overstreet replicas, 0); 29221c6fdbd8SKent Overstreet if (unlikely(ret)) 29230f238367SKent Overstreet goto bkey_err; 29241c6fdbd8SKent Overstreet 29251c6fdbd8SKent Overstreet reservation.v.nr_replicas = disk_res.nr_replicas; 29261c6fdbd8SKent Overstreet } 29271c6fdbd8SKent Overstreet 29288c6d298aSKent Overstreet ret = bch2_extent_update(&trans, inode_inum(inode), &iter, 29298c6d298aSKent Overstreet &reservation.k_i, 293068a2054dSKent Overstreet &disk_res, NULL, 2931a6336910SKent Overstreet 0, &i_sectors_delta, true); 29328810386fSKent Overstreet if (ret) 29338810386fSKent Overstreet goto bkey_err; 29342e87eae1SKent Overstreet i_sectors_acct(c, inode, "a_res, i_sectors_delta); 29350f238367SKent Overstreet bkey_err: 2936190fa7afSKent Overstreet bch2_quota_reservation_put(c, inode, "a_res); 29371c6fdbd8SKent Overstreet bch2_disk_reservation_put(c, &disk_res); 29381c6fdbd8SKent Overstreet if (ret == -EINTR) 29391c6fdbd8SKent Overstreet ret = 0; 294050dc0f69SKent Overstreet } 294174163da7SKent Overstreet 294274163da7SKent Overstreet if (ret == -ENOSPC && (mode & FALLOC_FL_ZERO_RANGE)) { 294374163da7SKent Overstreet struct quota_res quota_res = { 0 }; 294474163da7SKent Overstreet s64 i_sectors_delta = 0; 294574163da7SKent Overstreet 294674163da7SKent Overstreet bch2_fpunch_at(&trans, &iter, inode_inum(inode), 294774163da7SKent Overstreet end_sector, &i_sectors_delta); 294874163da7SKent Overstreet i_sectors_acct(c, inode, "a_res, i_sectors_delta); 294974163da7SKent Overstreet bch2_quota_reservation_put(c, inode, "a_res); 295074163da7SKent Overstreet } 295174163da7SKent Overstreet 295267e0dd8fSKent Overstreet bch2_trans_iter_exit(&trans, &iter); 2953694015c2SKent Overstreet bch2_trans_exit(&trans); 2954694015c2SKent Overstreet return ret; 2955694015c2SKent Overstreet } 295650dc0f69SKent Overstreet 2957694015c2SKent Overstreet static long bchfs_fallocate(struct bch_inode_info *inode, int mode, 2958694015c2SKent Overstreet loff_t offset, loff_t len) 2959694015c2SKent Overstreet { 2960694015c2SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 296174163da7SKent Overstreet u64 end = offset + len; 296274163da7SKent Overstreet u64 block_start = round_down(offset, block_bytes(c)); 296374163da7SKent Overstreet u64 block_end = round_up(end, block_bytes(c)); 296474163da7SKent Overstreet bool truncated_last_page = false; 296574163da7SKent Overstreet int ret, ret2 = 0; 2966694015c2SKent Overstreet 2967694015c2SKent Overstreet if (!(mode & FALLOC_FL_KEEP_SIZE) && end > inode->v.i_size) { 2968694015c2SKent Overstreet ret = inode_newsize_ok(&inode->v, end); 2969694015c2SKent Overstreet if (ret) 297074163da7SKent Overstreet return ret; 2971694015c2SKent Overstreet } 2972694015c2SKent Overstreet 2973694015c2SKent Overstreet if (mode & FALLOC_FL_ZERO_RANGE) { 297474163da7SKent Overstreet ret = bch2_truncate_pages(inode, offset, end); 297574163da7SKent Overstreet if (unlikely(ret < 0)) 297674163da7SKent Overstreet return ret; 2977694015c2SKent Overstreet 297874163da7SKent Overstreet truncated_last_page = ret; 2979694015c2SKent Overstreet 2980694015c2SKent Overstreet truncate_pagecache_range(&inode->v, offset, end - 1); 298174163da7SKent Overstreet 298274163da7SKent Overstreet block_start = round_up(offset, block_bytes(c)); 298374163da7SKent Overstreet block_end = round_down(end, block_bytes(c)); 2984694015c2SKent Overstreet } 2985694015c2SKent Overstreet 2986694015c2SKent Overstreet ret = __bchfs_fallocate(inode, mode, block_start >> 9, block_end >> 9); 2987e0541a93SKent Overstreet 2988e0541a93SKent Overstreet /* 298974163da7SKent Overstreet * On -ENOSPC in ZERO_RANGE mode, we still want to do the inode update, 299074163da7SKent Overstreet * so that the VFS cache i_size is consistent with the btree i_size: 2991e0541a93SKent Overstreet */ 299274163da7SKent Overstreet if (ret && 299374163da7SKent Overstreet !(ret == -ENOSPC && (mode & FALLOC_FL_ZERO_RANGE))) 299474163da7SKent Overstreet return ret; 29951c6fdbd8SKent Overstreet 299674163da7SKent Overstreet if (mode & FALLOC_FL_KEEP_SIZE && end > inode->v.i_size) 2997e0541a93SKent Overstreet end = inode->v.i_size; 299874163da7SKent Overstreet 299974163da7SKent Overstreet if (end >= inode->v.i_size && 300074163da7SKent Overstreet (((mode & FALLOC_FL_ZERO_RANGE) && !truncated_last_page) || 300174163da7SKent Overstreet !(mode & FALLOC_FL_KEEP_SIZE))) { 300274163da7SKent Overstreet spin_lock(&inode->v.i_lock); 3003e0541a93SKent Overstreet i_size_write(&inode->v, end); 300474163da7SKent Overstreet spin_unlock(&inode->v.i_lock); 3005e0541a93SKent Overstreet 30061c6fdbd8SKent Overstreet mutex_lock(&inode->ei_update_lock); 300774163da7SKent Overstreet ret2 = bch2_write_inode_size(c, inode, end, 0); 30081c6fdbd8SKent Overstreet mutex_unlock(&inode->ei_update_lock); 30091c6fdbd8SKent Overstreet } 301074163da7SKent Overstreet 301174163da7SKent Overstreet return ret ?: ret2; 30121c6fdbd8SKent Overstreet } 30131c6fdbd8SKent Overstreet 30141c6fdbd8SKent Overstreet long bch2_fallocate_dispatch(struct file *file, int mode, 30151c6fdbd8SKent Overstreet loff_t offset, loff_t len) 30161c6fdbd8SKent Overstreet { 30171c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 30182a9101a9SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 30192a9101a9SKent Overstreet long ret; 30202a9101a9SKent Overstreet 30212a9101a9SKent Overstreet if (!percpu_ref_tryget(&c->writes)) 30222a9101a9SKent Overstreet return -EROFS; 30231c6fdbd8SKent Overstreet 302474163da7SKent Overstreet inode_lock(&inode->v); 302574163da7SKent Overstreet inode_dio_wait(&inode->v); 302674163da7SKent Overstreet bch2_pagecache_block_get(&inode->ei_pagecache_lock); 302774163da7SKent Overstreet 30281c6fdbd8SKent Overstreet if (!(mode & ~(FALLOC_FL_KEEP_SIZE|FALLOC_FL_ZERO_RANGE))) 30292a9101a9SKent Overstreet ret = bchfs_fallocate(inode, mode, offset, len); 30302a9101a9SKent Overstreet else if (mode == (FALLOC_FL_PUNCH_HOLE|FALLOC_FL_KEEP_SIZE)) 30312a9101a9SKent Overstreet ret = bchfs_fpunch(inode, offset, len); 30322a9101a9SKent Overstreet else if (mode == FALLOC_FL_INSERT_RANGE) 30332a9101a9SKent Overstreet ret = bchfs_fcollapse_finsert(inode, offset, len, true); 30342a9101a9SKent Overstreet else if (mode == FALLOC_FL_COLLAPSE_RANGE) 30352a9101a9SKent Overstreet ret = bchfs_fcollapse_finsert(inode, offset, len, false); 30362a9101a9SKent Overstreet else 30372a9101a9SKent Overstreet ret = -EOPNOTSUPP; 30381c6fdbd8SKent Overstreet 303974163da7SKent Overstreet 304074163da7SKent Overstreet bch2_pagecache_block_put(&inode->ei_pagecache_lock); 304174163da7SKent Overstreet inode_unlock(&inode->v); 30422a9101a9SKent Overstreet percpu_ref_put(&c->writes); 30431c6fdbd8SKent Overstreet 30442a9101a9SKent Overstreet return ret; 30451c6fdbd8SKent Overstreet } 30461c6fdbd8SKent Overstreet 304776426098SKent Overstreet static void mark_range_unallocated(struct bch_inode_info *inode, 304876426098SKent Overstreet loff_t start, loff_t end) 304976426098SKent Overstreet { 305076426098SKent Overstreet pgoff_t index = start >> PAGE_SHIFT; 305176426098SKent Overstreet pgoff_t end_index = (end - 1) >> PAGE_SHIFT; 305276426098SKent Overstreet struct folio_batch fbatch; 305376426098SKent Overstreet unsigned i, j; 305476426098SKent Overstreet 305576426098SKent Overstreet folio_batch_init(&fbatch); 305676426098SKent Overstreet 305776426098SKent Overstreet while (filemap_get_folios(inode->v.i_mapping, 305876426098SKent Overstreet &index, end_index, &fbatch)) { 305976426098SKent Overstreet for (i = 0; i < folio_batch_count(&fbatch); i++) { 306076426098SKent Overstreet struct folio *folio = fbatch.folios[i]; 306176426098SKent Overstreet struct bch_page_state *s; 306276426098SKent Overstreet 306376426098SKent Overstreet folio_lock(folio); 306476426098SKent Overstreet s = bch2_page_state(&folio->page); 306576426098SKent Overstreet 30663826ee0bSKent Overstreet if (s) { 30673826ee0bSKent Overstreet spin_lock(&s->lock); 306876426098SKent Overstreet for (j = 0; j < PAGE_SECTORS; j++) 306976426098SKent Overstreet s->s[j].nr_replicas = 0; 30703826ee0bSKent Overstreet spin_unlock(&s->lock); 30713826ee0bSKent Overstreet } 307276426098SKent Overstreet 307376426098SKent Overstreet folio_unlock(folio); 307476426098SKent Overstreet } 307576426098SKent Overstreet folio_batch_release(&fbatch); 307676426098SKent Overstreet cond_resched(); 307776426098SKent Overstreet } 307876426098SKent Overstreet } 307976426098SKent Overstreet 308076426098SKent Overstreet loff_t bch2_remap_file_range(struct file *file_src, loff_t pos_src, 308176426098SKent Overstreet struct file *file_dst, loff_t pos_dst, 308276426098SKent Overstreet loff_t len, unsigned remap_flags) 308376426098SKent Overstreet { 308476426098SKent Overstreet struct bch_inode_info *src = file_bch_inode(file_src); 308576426098SKent Overstreet struct bch_inode_info *dst = file_bch_inode(file_dst); 308676426098SKent Overstreet struct bch_fs *c = src->v.i_sb->s_fs_info; 30872e87eae1SKent Overstreet s64 i_sectors_delta = 0; 3088677fc056SKent Overstreet u64 aligned_len; 308976426098SKent Overstreet loff_t ret = 0; 309076426098SKent Overstreet 309176426098SKent Overstreet if (remap_flags & ~(REMAP_FILE_DEDUP|REMAP_FILE_ADVISORY)) 309276426098SKent Overstreet return -EINVAL; 309376426098SKent Overstreet 309476426098SKent Overstreet if (remap_flags & REMAP_FILE_DEDUP) 309576426098SKent Overstreet return -EOPNOTSUPP; 309676426098SKent Overstreet 309776426098SKent Overstreet if ((pos_src & (block_bytes(c) - 1)) || 309876426098SKent Overstreet (pos_dst & (block_bytes(c) - 1))) 309976426098SKent Overstreet return -EINVAL; 310076426098SKent Overstreet 310176426098SKent Overstreet if (src == dst && 310276426098SKent Overstreet abs(pos_src - pos_dst) < len) 310376426098SKent Overstreet return -EINVAL; 310476426098SKent Overstreet 310576426098SKent Overstreet bch2_lock_inodes(INODE_LOCK|INODE_PAGECACHE_BLOCK, src, dst); 310676426098SKent Overstreet 31072e87eae1SKent Overstreet file_update_time(file_dst); 31082e87eae1SKent Overstreet 310976426098SKent Overstreet inode_dio_wait(&src->v); 311076426098SKent Overstreet inode_dio_wait(&dst->v); 311176426098SKent Overstreet 311276426098SKent Overstreet ret = generic_remap_file_range_prep(file_src, pos_src, 311376426098SKent Overstreet file_dst, pos_dst, 311476426098SKent Overstreet &len, remap_flags); 311576426098SKent Overstreet if (ret < 0 || len == 0) 31162e87eae1SKent Overstreet goto err; 311776426098SKent Overstreet 3118677fc056SKent Overstreet aligned_len = round_up((u64) len, block_bytes(c)); 311976426098SKent Overstreet 312076426098SKent Overstreet ret = write_invalidate_inode_pages_range(dst->v.i_mapping, 3121677fc056SKent Overstreet pos_dst, pos_dst + len - 1); 312276426098SKent Overstreet if (ret) 31232e87eae1SKent Overstreet goto err; 312476426098SKent Overstreet 312576426098SKent Overstreet mark_range_unallocated(src, pos_src, pos_src + aligned_len); 312676426098SKent Overstreet 31272e87eae1SKent Overstreet ret = bch2_remap_range(c, 31286fed42bbSKent Overstreet inode_inum(dst), pos_dst >> 9, 31296fed42bbSKent Overstreet inode_inum(src), pos_src >> 9, 313076426098SKent Overstreet aligned_len >> 9, 31312e87eae1SKent Overstreet pos_dst + len, &i_sectors_delta); 31322e87eae1SKent Overstreet if (ret < 0) 31332e87eae1SKent Overstreet goto err; 313476426098SKent Overstreet 31352e87eae1SKent Overstreet /* 31362e87eae1SKent Overstreet * due to alignment, we might have remapped slightly more than requsted 31372e87eae1SKent Overstreet */ 3138677fc056SKent Overstreet ret = min((u64) ret << 9, (u64) len); 31392e87eae1SKent Overstreet 31402e87eae1SKent Overstreet /* XXX get a quota reservation */ 31412e87eae1SKent Overstreet i_sectors_acct(c, dst, NULL, i_sectors_delta); 31422e87eae1SKent Overstreet 31432e87eae1SKent Overstreet spin_lock(&dst->v.i_lock); 3144677fc056SKent Overstreet if (pos_dst + ret > dst->v.i_size) 3145677fc056SKent Overstreet i_size_write(&dst->v, pos_dst + ret); 31462e87eae1SKent Overstreet spin_unlock(&dst->v.i_lock); 3147e7084c9cSKent Overstreet 314868a2054dSKent Overstreet if ((file_dst->f_flags & (__O_SYNC | O_DSYNC)) || 314968a2054dSKent Overstreet IS_SYNC(file_inode(file_dst))) 315068a2054dSKent Overstreet ret = bch2_flush_inode(c, inode_inum(dst)); 31512e87eae1SKent Overstreet err: 315276426098SKent Overstreet bch2_unlock_inodes(INODE_LOCK|INODE_PAGECACHE_BLOCK, src, dst); 315376426098SKent Overstreet 315476426098SKent Overstreet return ret; 315576426098SKent Overstreet } 315676426098SKent Overstreet 31571c6fdbd8SKent Overstreet /* fseek: */ 31581c6fdbd8SKent Overstreet 3159543ef2ebSKent Overstreet static int folio_data_offset(struct folio *folio, unsigned offset) 31601c6fdbd8SKent Overstreet { 3161f57a6a5dSKent Overstreet struct bch_page_state *s = bch2_page_state(&folio->page); 3162f57a6a5dSKent Overstreet unsigned i; 3163f81b648dSKent Overstreet 3164543ef2ebSKent Overstreet if (s) 3165543ef2ebSKent Overstreet for (i = offset >> 9; i < PAGE_SECTORS; i++) 3166f57a6a5dSKent Overstreet if (s->s[i].state >= SECTOR_DIRTY) 3167543ef2ebSKent Overstreet return i << 9; 3168f57a6a5dSKent Overstreet 3169543ef2ebSKent Overstreet return -1; 31701c6fdbd8SKent Overstreet } 31711c6fdbd8SKent Overstreet 3172543ef2ebSKent Overstreet static loff_t bch2_seek_pagecache_data(struct inode *vinode, 31731c6fdbd8SKent Overstreet loff_t start_offset, 31741c6fdbd8SKent Overstreet loff_t end_offset) 31751c6fdbd8SKent Overstreet { 31761c6fdbd8SKent Overstreet struct folio_batch fbatch; 31771c6fdbd8SKent Overstreet pgoff_t start_index = start_offset >> PAGE_SHIFT; 31781c6fdbd8SKent Overstreet pgoff_t end_index = end_offset >> PAGE_SHIFT; 31791c6fdbd8SKent Overstreet pgoff_t index = start_index; 31801c6fdbd8SKent Overstreet unsigned i; 3181543ef2ebSKent Overstreet loff_t ret; 3182543ef2ebSKent Overstreet int offset; 31831c6fdbd8SKent Overstreet 31841c6fdbd8SKent Overstreet folio_batch_init(&fbatch); 31851c6fdbd8SKent Overstreet 31861c6fdbd8SKent Overstreet while (filemap_get_folios(vinode->i_mapping, 31871c6fdbd8SKent Overstreet &index, end_index, &fbatch)) { 31881c6fdbd8SKent Overstreet for (i = 0; i < folio_batch_count(&fbatch); i++) { 31891c6fdbd8SKent Overstreet struct folio *folio = fbatch.folios[i]; 31901c6fdbd8SKent Overstreet 31911c6fdbd8SKent Overstreet folio_lock(folio); 3192543ef2ebSKent Overstreet offset = folio_data_offset(folio, 3193543ef2ebSKent Overstreet folio->index == start_index 3194543ef2ebSKent Overstreet ? start_offset & (PAGE_SIZE - 1) 3195543ef2ebSKent Overstreet : 0); 3196543ef2ebSKent Overstreet if (offset >= 0) { 3197543ef2ebSKent Overstreet ret = clamp(((loff_t) folio->index << PAGE_SHIFT) + 3198543ef2ebSKent Overstreet offset, 3199543ef2ebSKent Overstreet start_offset, end_offset); 32001c6fdbd8SKent Overstreet folio_unlock(folio); 32011c6fdbd8SKent Overstreet folio_batch_release(&fbatch); 3202543ef2ebSKent Overstreet return ret; 32031c6fdbd8SKent Overstreet } 32041c6fdbd8SKent Overstreet folio_unlock(folio); 32051c6fdbd8SKent Overstreet } 32061c6fdbd8SKent Overstreet folio_batch_release(&fbatch); 32071c6fdbd8SKent Overstreet cond_resched(); 32081c6fdbd8SKent Overstreet } 32091c6fdbd8SKent Overstreet 32101c6fdbd8SKent Overstreet return end_offset; 32111c6fdbd8SKent Overstreet } 32121c6fdbd8SKent Overstreet 32131c6fdbd8SKent Overstreet static loff_t bch2_seek_data(struct file *file, u64 offset) 32141c6fdbd8SKent Overstreet { 32151c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 32161c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 3217424eb881SKent Overstreet struct btree_trans trans; 321867e0dd8fSKent Overstreet struct btree_iter iter; 32191c6fdbd8SKent Overstreet struct bkey_s_c k; 32206fed42bbSKent Overstreet subvol_inum inum = inode_inum(inode); 32211c6fdbd8SKent Overstreet u64 isize, next_data = MAX_LFS_FILESIZE; 32226fed42bbSKent Overstreet u32 snapshot; 32231c6fdbd8SKent Overstreet int ret; 32241c6fdbd8SKent Overstreet 32251c6fdbd8SKent Overstreet isize = i_size_read(&inode->v); 32261c6fdbd8SKent Overstreet if (offset >= isize) 32271c6fdbd8SKent Overstreet return -ENXIO; 32281c6fdbd8SKent Overstreet 322920bceecbSKent Overstreet bch2_trans_init(&trans, c, 0, 0); 32306fed42bbSKent Overstreet retry: 32316fed42bbSKent Overstreet bch2_trans_begin(&trans); 32326fed42bbSKent Overstreet 32336fed42bbSKent Overstreet ret = bch2_subvolume_get_snapshot(&trans, inum.subvol, &snapshot); 32346fed42bbSKent Overstreet if (ret) 32356fed42bbSKent Overstreet goto err; 3236424eb881SKent Overstreet 3237e5fa91d7SKent Overstreet for_each_btree_key_norestart(&trans, iter, BTREE_ID_extents, 32386fed42bbSKent Overstreet SPOS(inode->v.i_ino, offset >> 9, snapshot), 0, k, ret) { 32391c6fdbd8SKent Overstreet if (k.k->p.inode != inode->v.i_ino) { 32401c6fdbd8SKent Overstreet break; 32411c6fdbd8SKent Overstreet } else if (bkey_extent_is_data(k.k)) { 32421c6fdbd8SKent Overstreet next_data = max(offset, bkey_start_offset(k.k) << 9); 32431c6fdbd8SKent Overstreet break; 32441c6fdbd8SKent Overstreet } else if (k.k->p.offset >> 9 > isize) 32451c6fdbd8SKent Overstreet break; 32461c6fdbd8SKent Overstreet } 324767e0dd8fSKent Overstreet bch2_trans_iter_exit(&trans, &iter); 32486fed42bbSKent Overstreet err: 32496fed42bbSKent Overstreet if (ret == -EINTR) 32506fed42bbSKent Overstreet goto retry; 32511c6fdbd8SKent Overstreet 32529a796fdbSKent Overstreet bch2_trans_exit(&trans); 32531c6fdbd8SKent Overstreet if (ret) 32541c6fdbd8SKent Overstreet return ret; 32551c6fdbd8SKent Overstreet 32561c6fdbd8SKent Overstreet if (next_data > offset) 3257543ef2ebSKent Overstreet next_data = bch2_seek_pagecache_data(&inode->v, 32581c6fdbd8SKent Overstreet offset, next_data); 32591c6fdbd8SKent Overstreet 3260e10d3094SKent Overstreet if (next_data >= isize) 32611c6fdbd8SKent Overstreet return -ENXIO; 32621c6fdbd8SKent Overstreet 32631c6fdbd8SKent Overstreet return vfs_setpos(file, next_data, MAX_LFS_FILESIZE); 32641c6fdbd8SKent Overstreet } 32651c6fdbd8SKent Overstreet 3266543ef2ebSKent Overstreet static int __page_hole_offset(struct page *page, unsigned offset) 32671c6fdbd8SKent Overstreet { 3268543ef2ebSKent Overstreet struct bch_page_state *s = bch2_page_state(page); 3269543ef2ebSKent Overstreet unsigned i; 3270543ef2ebSKent Overstreet 3271543ef2ebSKent Overstreet if (!s) 3272543ef2ebSKent Overstreet return 0; 3273543ef2ebSKent Overstreet 3274543ef2ebSKent Overstreet for (i = offset >> 9; i < PAGE_SECTORS; i++) 3275543ef2ebSKent Overstreet if (s->s[i].state < SECTOR_DIRTY) 3276543ef2ebSKent Overstreet return i << 9; 3277543ef2ebSKent Overstreet 3278543ef2ebSKent Overstreet return -1; 3279543ef2ebSKent Overstreet } 3280543ef2ebSKent Overstreet 3281543ef2ebSKent Overstreet static loff_t page_hole_offset(struct address_space *mapping, loff_t offset) 3282543ef2ebSKent Overstreet { 3283543ef2ebSKent Overstreet pgoff_t index = offset >> PAGE_SHIFT; 32841c6fdbd8SKent Overstreet struct page *page; 3285543ef2ebSKent Overstreet int pg_offset; 3286543ef2ebSKent Overstreet loff_t ret = -1; 32871c6fdbd8SKent Overstreet 32881c6fdbd8SKent Overstreet page = find_lock_page(mapping, index); 32891c6fdbd8SKent Overstreet if (!page) 3290543ef2ebSKent Overstreet return offset; 32911c6fdbd8SKent Overstreet 3292543ef2ebSKent Overstreet pg_offset = __page_hole_offset(page, offset & (PAGE_SIZE - 1)); 3293543ef2ebSKent Overstreet if (pg_offset >= 0) 3294543ef2ebSKent Overstreet ret = ((loff_t) index << PAGE_SHIFT) + pg_offset; 3295543ef2ebSKent Overstreet 32961c6fdbd8SKent Overstreet unlock_page(page); 32971c6fdbd8SKent Overstreet 32981c6fdbd8SKent Overstreet return ret; 32991c6fdbd8SKent Overstreet } 33001c6fdbd8SKent Overstreet 3301543ef2ebSKent Overstreet static loff_t bch2_seek_pagecache_hole(struct inode *vinode, 33021c6fdbd8SKent Overstreet loff_t start_offset, 33031c6fdbd8SKent Overstreet loff_t end_offset) 33041c6fdbd8SKent Overstreet { 33051c6fdbd8SKent Overstreet struct address_space *mapping = vinode->i_mapping; 3306543ef2ebSKent Overstreet loff_t offset = start_offset, hole; 33071c6fdbd8SKent Overstreet 3308543ef2ebSKent Overstreet while (offset < end_offset) { 3309543ef2ebSKent Overstreet hole = page_hole_offset(mapping, offset); 3310543ef2ebSKent Overstreet if (hole >= 0 && hole <= end_offset) 3311543ef2ebSKent Overstreet return max(start_offset, hole); 3312543ef2ebSKent Overstreet 3313543ef2ebSKent Overstreet offset += PAGE_SIZE; 3314543ef2ebSKent Overstreet offset &= PAGE_MASK; 3315543ef2ebSKent Overstreet } 33161c6fdbd8SKent Overstreet 33171c6fdbd8SKent Overstreet return end_offset; 33181c6fdbd8SKent Overstreet } 33191c6fdbd8SKent Overstreet 33201c6fdbd8SKent Overstreet static loff_t bch2_seek_hole(struct file *file, u64 offset) 33211c6fdbd8SKent Overstreet { 33221c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 33231c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 3324424eb881SKent Overstreet struct btree_trans trans; 332567e0dd8fSKent Overstreet struct btree_iter iter; 33261c6fdbd8SKent Overstreet struct bkey_s_c k; 33276fed42bbSKent Overstreet subvol_inum inum = inode_inum(inode); 33281c6fdbd8SKent Overstreet u64 isize, next_hole = MAX_LFS_FILESIZE; 33296fed42bbSKent Overstreet u32 snapshot; 33301c6fdbd8SKent Overstreet int ret; 33311c6fdbd8SKent Overstreet 33321c6fdbd8SKent Overstreet isize = i_size_read(&inode->v); 33331c6fdbd8SKent Overstreet if (offset >= isize) 33341c6fdbd8SKent Overstreet return -ENXIO; 33351c6fdbd8SKent Overstreet 333620bceecbSKent Overstreet bch2_trans_init(&trans, c, 0, 0); 33376fed42bbSKent Overstreet retry: 33386fed42bbSKent Overstreet bch2_trans_begin(&trans); 33396fed42bbSKent Overstreet 33406fed42bbSKent Overstreet ret = bch2_subvolume_get_snapshot(&trans, inum.subvol, &snapshot); 33416fed42bbSKent Overstreet if (ret) 33426fed42bbSKent Overstreet goto err; 3343424eb881SKent Overstreet 3344e5fa91d7SKent Overstreet for_each_btree_key_norestart(&trans, iter, BTREE_ID_extents, 33456fed42bbSKent Overstreet SPOS(inode->v.i_ino, offset >> 9, snapshot), 334694f651e2SKent Overstreet BTREE_ITER_SLOTS, k, ret) { 33471c6fdbd8SKent Overstreet if (k.k->p.inode != inode->v.i_ino) { 3348543ef2ebSKent Overstreet next_hole = bch2_seek_pagecache_hole(&inode->v, 33491c6fdbd8SKent Overstreet offset, MAX_LFS_FILESIZE); 33501c6fdbd8SKent Overstreet break; 33511c6fdbd8SKent Overstreet } else if (!bkey_extent_is_data(k.k)) { 3352543ef2ebSKent Overstreet next_hole = bch2_seek_pagecache_hole(&inode->v, 33531c6fdbd8SKent Overstreet max(offset, bkey_start_offset(k.k) << 9), 33541c6fdbd8SKent Overstreet k.k->p.offset << 9); 33551c6fdbd8SKent Overstreet 33561c6fdbd8SKent Overstreet if (next_hole < k.k->p.offset << 9) 33571c6fdbd8SKent Overstreet break; 33581c6fdbd8SKent Overstreet } else { 33591c6fdbd8SKent Overstreet offset = max(offset, bkey_start_offset(k.k) << 9); 33601c6fdbd8SKent Overstreet } 33611c6fdbd8SKent Overstreet } 336267e0dd8fSKent Overstreet bch2_trans_iter_exit(&trans, &iter); 33636fed42bbSKent Overstreet err: 33646fed42bbSKent Overstreet if (ret == -EINTR) 33656fed42bbSKent Overstreet goto retry; 33661c6fdbd8SKent Overstreet 33679a796fdbSKent Overstreet bch2_trans_exit(&trans); 33681c6fdbd8SKent Overstreet if (ret) 33691c6fdbd8SKent Overstreet return ret; 33701c6fdbd8SKent Overstreet 33711c6fdbd8SKent Overstreet if (next_hole > isize) 33721c6fdbd8SKent Overstreet next_hole = isize; 33731c6fdbd8SKent Overstreet 33741c6fdbd8SKent Overstreet return vfs_setpos(file, next_hole, MAX_LFS_FILESIZE); 33751c6fdbd8SKent Overstreet } 33761c6fdbd8SKent Overstreet 33771c6fdbd8SKent Overstreet loff_t bch2_llseek(struct file *file, loff_t offset, int whence) 33781c6fdbd8SKent Overstreet { 33791c6fdbd8SKent Overstreet switch (whence) { 33801c6fdbd8SKent Overstreet case SEEK_SET: 33811c6fdbd8SKent Overstreet case SEEK_CUR: 33821c6fdbd8SKent Overstreet case SEEK_END: 33831c6fdbd8SKent Overstreet return generic_file_llseek(file, offset, whence); 33841c6fdbd8SKent Overstreet case SEEK_DATA: 33851c6fdbd8SKent Overstreet return bch2_seek_data(file, offset); 33861c6fdbd8SKent Overstreet case SEEK_HOLE: 33871c6fdbd8SKent Overstreet return bch2_seek_hole(file, offset); 33881c6fdbd8SKent Overstreet } 33891c6fdbd8SKent Overstreet 33901c6fdbd8SKent Overstreet return -EINVAL; 33911c6fdbd8SKent Overstreet } 33921c6fdbd8SKent Overstreet 33931c6fdbd8SKent Overstreet void bch2_fs_fsio_exit(struct bch_fs *c) 33941c6fdbd8SKent Overstreet { 33951c6fdbd8SKent Overstreet bioset_exit(&c->dio_write_bioset); 33961c6fdbd8SKent Overstreet bioset_exit(&c->dio_read_bioset); 33971c6fdbd8SKent Overstreet bioset_exit(&c->writepage_bioset); 33981c6fdbd8SKent Overstreet } 33991c6fdbd8SKent Overstreet 34001c6fdbd8SKent Overstreet int bch2_fs_fsio_init(struct bch_fs *c) 34011c6fdbd8SKent Overstreet { 34021c6fdbd8SKent Overstreet int ret = 0; 34031c6fdbd8SKent Overstreet 34041c6fdbd8SKent Overstreet pr_verbose_init(c->opts, ""); 34051c6fdbd8SKent Overstreet 34061c6fdbd8SKent Overstreet if (bioset_init(&c->writepage_bioset, 34079a3df993SKent Overstreet 4, offsetof(struct bch_writepage_io, op.wbio.bio), 34081c6fdbd8SKent Overstreet BIOSET_NEED_BVECS) || 34091c6fdbd8SKent Overstreet bioset_init(&c->dio_read_bioset, 34101c6fdbd8SKent Overstreet 4, offsetof(struct dio_read, rbio.bio), 34111c6fdbd8SKent Overstreet BIOSET_NEED_BVECS) || 34121c6fdbd8SKent Overstreet bioset_init(&c->dio_write_bioset, 34139a3df993SKent Overstreet 4, offsetof(struct dio_write, op.wbio.bio), 34141c6fdbd8SKent Overstreet BIOSET_NEED_BVECS)) 34151c6fdbd8SKent Overstreet ret = -ENOMEM; 34161c6fdbd8SKent Overstreet 34171c6fdbd8SKent Overstreet pr_verbose_init(c->opts, "ret %i", ret); 34181c6fdbd8SKent Overstreet return ret; 34191c6fdbd8SKent Overstreet } 34201c6fdbd8SKent Overstreet 34211c6fdbd8SKent Overstreet #endif /* NO_BCACHEFS_FS */ 3422