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 { 751c6fdbd8SKent Overstreet struct kiocb *req; 76*182c7bbfSKent Overstreet struct address_space *mapping; 77*182c7bbfSKent Overstreet struct bch_inode_info *inode; 78ed484030SKent Overstreet struct mm_struct *mm; 791c6fdbd8SKent Overstreet unsigned loop:1, 801c6fdbd8SKent Overstreet sync:1, 811c6fdbd8SKent Overstreet free_iov:1; 821c6fdbd8SKent Overstreet struct quota_res quota_res; 83042a1f26SKent Overstreet u64 written; 841c6fdbd8SKent Overstreet 851c6fdbd8SKent Overstreet struct iov_iter iter; 861c6fdbd8SKent Overstreet struct iovec inline_vecs[2]; 871c6fdbd8SKent Overstreet 881c6fdbd8SKent Overstreet /* must be last: */ 899a3df993SKent Overstreet struct bch_write_op op; 901c6fdbd8SKent Overstreet }; 911c6fdbd8SKent Overstreet 921c6fdbd8SKent Overstreet struct dio_read { 931c6fdbd8SKent Overstreet struct closure cl; 941c6fdbd8SKent Overstreet struct kiocb *req; 951c6fdbd8SKent Overstreet long ret; 96b4725cc1SKent Overstreet bool should_dirty; 971c6fdbd8SKent Overstreet struct bch_read_bio rbio; 981c6fdbd8SKent Overstreet }; 991c6fdbd8SKent Overstreet 1001c6fdbd8SKent Overstreet /* pagecache_block must be held */ 101a023127aSKent Overstreet static noinline int write_invalidate_inode_pages_range(struct address_space *mapping, 1021c6fdbd8SKent Overstreet loff_t start, loff_t end) 1031c6fdbd8SKent Overstreet { 1041c6fdbd8SKent Overstreet int ret; 1051c6fdbd8SKent Overstreet 1061c6fdbd8SKent Overstreet /* 1071c6fdbd8SKent Overstreet * XXX: the way this is currently implemented, we can spin if a process 1081c6fdbd8SKent Overstreet * is continually redirtying a specific page 1091c6fdbd8SKent Overstreet */ 1101c6fdbd8SKent Overstreet do { 1111c6fdbd8SKent Overstreet if (!mapping->nrpages) 1121c6fdbd8SKent Overstreet return 0; 1131c6fdbd8SKent Overstreet 1141c6fdbd8SKent Overstreet ret = filemap_write_and_wait_range(mapping, start, end); 1151c6fdbd8SKent Overstreet if (ret) 1161c6fdbd8SKent Overstreet break; 1171c6fdbd8SKent Overstreet 1181c6fdbd8SKent Overstreet if (!mapping->nrpages) 1191c6fdbd8SKent Overstreet return 0; 1201c6fdbd8SKent Overstreet 1211c6fdbd8SKent Overstreet ret = invalidate_inode_pages2_range(mapping, 1221c6fdbd8SKent Overstreet start >> PAGE_SHIFT, 1231c6fdbd8SKent Overstreet end >> PAGE_SHIFT); 1241c6fdbd8SKent Overstreet } while (ret == -EBUSY); 1251c6fdbd8SKent Overstreet 1261c6fdbd8SKent Overstreet return ret; 1271c6fdbd8SKent Overstreet } 1281c6fdbd8SKent Overstreet 1291c6fdbd8SKent Overstreet /* quotas */ 1301c6fdbd8SKent Overstreet 1311c6fdbd8SKent Overstreet #ifdef CONFIG_BCACHEFS_QUOTA 1321c6fdbd8SKent Overstreet 1331c6fdbd8SKent Overstreet static void bch2_quota_reservation_put(struct bch_fs *c, 1341c6fdbd8SKent Overstreet struct bch_inode_info *inode, 1351c6fdbd8SKent Overstreet struct quota_res *res) 1361c6fdbd8SKent Overstreet { 1371c6fdbd8SKent Overstreet if (!res->sectors) 1381c6fdbd8SKent Overstreet return; 1391c6fdbd8SKent Overstreet 1401c6fdbd8SKent Overstreet mutex_lock(&inode->ei_quota_lock); 1411c6fdbd8SKent Overstreet BUG_ON(res->sectors > inode->ei_quota_reserved); 1421c6fdbd8SKent Overstreet 1431c6fdbd8SKent Overstreet bch2_quota_acct(c, inode->ei_qid, Q_SPC, 14426609b61SKent Overstreet -((s64) res->sectors), KEY_TYPE_QUOTA_PREALLOC); 1451c6fdbd8SKent Overstreet inode->ei_quota_reserved -= res->sectors; 1461c6fdbd8SKent Overstreet mutex_unlock(&inode->ei_quota_lock); 1471c6fdbd8SKent Overstreet 1481c6fdbd8SKent Overstreet res->sectors = 0; 1491c6fdbd8SKent Overstreet } 1501c6fdbd8SKent Overstreet 1511c6fdbd8SKent Overstreet static int bch2_quota_reservation_add(struct bch_fs *c, 1521c6fdbd8SKent Overstreet struct bch_inode_info *inode, 1531c6fdbd8SKent Overstreet struct quota_res *res, 154e8540e56SKent Overstreet u64 sectors, 1551c6fdbd8SKent Overstreet bool check_enospc) 1561c6fdbd8SKent Overstreet { 1571c6fdbd8SKent Overstreet int ret; 1581c6fdbd8SKent Overstreet 1591c6fdbd8SKent Overstreet mutex_lock(&inode->ei_quota_lock); 1601c6fdbd8SKent Overstreet ret = bch2_quota_acct(c, inode->ei_qid, Q_SPC, sectors, 16126609b61SKent Overstreet check_enospc ? KEY_TYPE_QUOTA_PREALLOC : KEY_TYPE_QUOTA_NOCHECK); 1621c6fdbd8SKent Overstreet if (likely(!ret)) { 1631c6fdbd8SKent Overstreet inode->ei_quota_reserved += sectors; 1641c6fdbd8SKent Overstreet res->sectors += sectors; 1651c6fdbd8SKent Overstreet } 1661c6fdbd8SKent Overstreet mutex_unlock(&inode->ei_quota_lock); 1671c6fdbd8SKent Overstreet 1681c6fdbd8SKent Overstreet return ret; 1691c6fdbd8SKent Overstreet } 1701c6fdbd8SKent Overstreet 1711c6fdbd8SKent Overstreet #else 1721c6fdbd8SKent Overstreet 1731c6fdbd8SKent Overstreet static void bch2_quota_reservation_put(struct bch_fs *c, 1741c6fdbd8SKent Overstreet struct bch_inode_info *inode, 1751c6fdbd8SKent Overstreet struct quota_res *res) 1761c6fdbd8SKent Overstreet { 1771c6fdbd8SKent Overstreet } 1781c6fdbd8SKent Overstreet 1791c6fdbd8SKent Overstreet static int bch2_quota_reservation_add(struct bch_fs *c, 1801c6fdbd8SKent Overstreet struct bch_inode_info *inode, 1811c6fdbd8SKent Overstreet struct quota_res *res, 1821c6fdbd8SKent Overstreet unsigned sectors, 1831c6fdbd8SKent Overstreet bool check_enospc) 1841c6fdbd8SKent Overstreet { 1851c6fdbd8SKent Overstreet return 0; 1861c6fdbd8SKent Overstreet } 1871c6fdbd8SKent Overstreet 1881c6fdbd8SKent Overstreet #endif 1891c6fdbd8SKent Overstreet 1901c6fdbd8SKent Overstreet /* i_size updates: */ 1911c6fdbd8SKent Overstreet 1922ea90048SKent Overstreet struct inode_new_size { 1932ea90048SKent Overstreet loff_t new_size; 1942ea90048SKent Overstreet u64 now; 1952ea90048SKent Overstreet unsigned fields; 1962ea90048SKent Overstreet }; 1972ea90048SKent Overstreet 1981c6fdbd8SKent Overstreet static int inode_set_size(struct bch_inode_info *inode, 1991c6fdbd8SKent Overstreet struct bch_inode_unpacked *bi, 2001c6fdbd8SKent Overstreet void *p) 2011c6fdbd8SKent Overstreet { 2022ea90048SKent Overstreet struct inode_new_size *s = p; 2031c6fdbd8SKent Overstreet 2042ea90048SKent Overstreet bi->bi_size = s->new_size; 2052ea90048SKent Overstreet if (s->fields & ATTR_ATIME) 2062ea90048SKent Overstreet bi->bi_atime = s->now; 2072ea90048SKent Overstreet if (s->fields & ATTR_MTIME) 2082ea90048SKent Overstreet bi->bi_mtime = s->now; 2092ea90048SKent Overstreet if (s->fields & ATTR_CTIME) 2102ea90048SKent Overstreet bi->bi_ctime = s->now; 2111c6fdbd8SKent Overstreet 2121c6fdbd8SKent Overstreet return 0; 2131c6fdbd8SKent Overstreet } 2141c6fdbd8SKent Overstreet 21576426098SKent Overstreet int __must_check bch2_write_inode_size(struct bch_fs *c, 2161c6fdbd8SKent Overstreet struct bch_inode_info *inode, 2172ea90048SKent Overstreet loff_t new_size, unsigned fields) 2181c6fdbd8SKent Overstreet { 2192ea90048SKent Overstreet struct inode_new_size s = { 2202ea90048SKent Overstreet .new_size = new_size, 2212ea90048SKent Overstreet .now = bch2_current_time(c), 2222ea90048SKent Overstreet .fields = fields, 2232ea90048SKent Overstreet }; 2242ea90048SKent Overstreet 2252ea90048SKent Overstreet return bch2_write_inode(c, inode, inode_set_size, &s, fields); 2261c6fdbd8SKent Overstreet } 2271c6fdbd8SKent Overstreet 2281c6fdbd8SKent Overstreet static void i_sectors_acct(struct bch_fs *c, struct bch_inode_info *inode, 229190fa7afSKent Overstreet struct quota_res *quota_res, s64 sectors) 2301c6fdbd8SKent Overstreet { 231190fa7afSKent Overstreet if (!sectors) 232190fa7afSKent Overstreet return; 233190fa7afSKent Overstreet 2341c6fdbd8SKent Overstreet mutex_lock(&inode->ei_quota_lock); 235b33bf1bcSKent Overstreet bch2_fs_inconsistent_on((s64) inode->v.i_blocks + sectors < 0, c, 236b33bf1bcSKent Overstreet "inode %lu i_blocks underflow: %llu + %lli < 0 (ondisk %lli)", 237b33bf1bcSKent Overstreet inode->v.i_ino, (u64) inode->v.i_blocks, sectors, 238b33bf1bcSKent Overstreet inode->ei_inode.bi_sectors); 239b44a66a6SKent Overstreet inode->v.i_blocks += sectors; 240b44a66a6SKent Overstreet 2411c6fdbd8SKent Overstreet #ifdef CONFIG_BCACHEFS_QUOTA 2421c6fdbd8SKent Overstreet if (quota_res && sectors > 0) { 2431c6fdbd8SKent Overstreet BUG_ON(sectors > quota_res->sectors); 2441c6fdbd8SKent Overstreet BUG_ON(sectors > inode->ei_quota_reserved); 2451c6fdbd8SKent Overstreet 2461c6fdbd8SKent Overstreet quota_res->sectors -= sectors; 2471c6fdbd8SKent Overstreet inode->ei_quota_reserved -= sectors; 2481c6fdbd8SKent Overstreet } else { 24926609b61SKent Overstreet bch2_quota_acct(c, inode->ei_qid, Q_SPC, sectors, KEY_TYPE_QUOTA_WARN); 2501c6fdbd8SKent Overstreet } 2511c6fdbd8SKent Overstreet #endif 2521c6fdbd8SKent Overstreet mutex_unlock(&inode->ei_quota_lock); 2531c6fdbd8SKent Overstreet } 2541c6fdbd8SKent Overstreet 2551c6fdbd8SKent Overstreet /* page state: */ 2561c6fdbd8SKent Overstreet 2571c6fdbd8SKent Overstreet /* stored in page->private: */ 2581c6fdbd8SKent Overstreet 259f57a6a5dSKent Overstreet struct bch_page_sector { 260b44a66a6SKent Overstreet /* Uncompressed, fully allocated replicas (or on disk reservation): */ 261b44a66a6SKent Overstreet unsigned nr_replicas:4; 262f81b648dSKent Overstreet 263b44a66a6SKent Overstreet /* Owns PAGE_SECTORS * replicas_reserved sized in memory reservation: */ 264b44a66a6SKent Overstreet unsigned replicas_reserved:4; 2651c6fdbd8SKent Overstreet 266f57a6a5dSKent Overstreet /* i_sectors: */ 267f57a6a5dSKent Overstreet enum { 268f57a6a5dSKent Overstreet SECTOR_UNALLOCATED, 2692ba5d38bSKent Overstreet SECTOR_RESERVED, 270f57a6a5dSKent Overstreet SECTOR_DIRTY, 271b44a66a6SKent Overstreet SECTOR_DIRTY_RESERVED, 272f57a6a5dSKent Overstreet SECTOR_ALLOCATED, 273b44a66a6SKent Overstreet } state:8; 2741c6fdbd8SKent Overstreet }; 2751c6fdbd8SKent Overstreet 276f57a6a5dSKent Overstreet struct bch_page_state { 2773826ee0bSKent Overstreet spinlock_t lock; 2787f5e31e1SKent Overstreet atomic_t write_count; 279e6ec361fSKent Overstreet bool uptodate; 280f57a6a5dSKent Overstreet struct bch_page_sector s[PAGE_SECTORS]; 281f57a6a5dSKent Overstreet }; 282f57a6a5dSKent Overstreet 283f57a6a5dSKent Overstreet static inline struct bch_page_state *__bch2_page_state(struct page *page) 2841c6fdbd8SKent Overstreet { 285f57a6a5dSKent Overstreet return page_has_private(page) 286f57a6a5dSKent Overstreet ? (struct bch_page_state *) page_private(page) 287f57a6a5dSKent Overstreet : NULL; 288f57a6a5dSKent Overstreet } 2891c6fdbd8SKent Overstreet 290f57a6a5dSKent Overstreet static inline struct bch_page_state *bch2_page_state(struct page *page) 291f57a6a5dSKent Overstreet { 292e1036a2aSKent Overstreet EBUG_ON(!PageLocked(page)); 2931c6fdbd8SKent Overstreet 294f57a6a5dSKent Overstreet return __bch2_page_state(page); 295f57a6a5dSKent Overstreet } 296f57a6a5dSKent Overstreet 297f57a6a5dSKent Overstreet /* for newly allocated pages: */ 298f57a6a5dSKent Overstreet static void __bch2_page_state_release(struct page *page) 299f57a6a5dSKent Overstreet { 30000276f9fSMatthew Wilcox (Oracle) kfree(detach_page_private(page)); 301f57a6a5dSKent Overstreet } 302f57a6a5dSKent Overstreet 303f57a6a5dSKent Overstreet static void bch2_page_state_release(struct page *page) 304f57a6a5dSKent Overstreet { 30500276f9fSMatthew Wilcox (Oracle) EBUG_ON(!PageLocked(page)); 30600276f9fSMatthew Wilcox (Oracle) __bch2_page_state_release(page); 307f57a6a5dSKent Overstreet } 308f57a6a5dSKent Overstreet 309f57a6a5dSKent Overstreet /* for newly allocated pages: */ 310f57a6a5dSKent Overstreet static struct bch_page_state *__bch2_page_state_create(struct page *page, 311f57a6a5dSKent Overstreet gfp_t gfp) 312f57a6a5dSKent Overstreet { 313f57a6a5dSKent Overstreet struct bch_page_state *s; 314f57a6a5dSKent Overstreet 315f57a6a5dSKent Overstreet s = kzalloc(sizeof(*s), GFP_NOFS|gfp); 316f57a6a5dSKent Overstreet if (!s) 317f57a6a5dSKent Overstreet return NULL; 318f57a6a5dSKent Overstreet 3193826ee0bSKent Overstreet spin_lock_init(&s->lock); 32000276f9fSMatthew Wilcox (Oracle) attach_page_private(page, s); 3211c6fdbd8SKent Overstreet return s; 3221c6fdbd8SKent Overstreet } 3231c6fdbd8SKent Overstreet 324f57a6a5dSKent Overstreet static struct bch_page_state *bch2_page_state_create(struct page *page, 325f57a6a5dSKent Overstreet gfp_t gfp) 326f57a6a5dSKent Overstreet { 327f57a6a5dSKent Overstreet return bch2_page_state(page) ?: __bch2_page_state_create(page, gfp); 328f57a6a5dSKent Overstreet } 329f57a6a5dSKent Overstreet 330b44a66a6SKent Overstreet static unsigned bkey_to_sector_state(const struct bkey *k) 331b44a66a6SKent Overstreet { 332b44a66a6SKent Overstreet if (k->type == KEY_TYPE_reservation) 333b44a66a6SKent Overstreet return SECTOR_RESERVED; 334b44a66a6SKent Overstreet if (bkey_extent_is_allocation(k)) 335b44a66a6SKent Overstreet return SECTOR_ALLOCATED; 336b44a66a6SKent Overstreet return SECTOR_UNALLOCATED; 337b44a66a6SKent Overstreet } 338b44a66a6SKent Overstreet 339e6ec361fSKent Overstreet static void __bch2_page_state_set(struct page *page, 340e6ec361fSKent Overstreet unsigned pg_offset, unsigned pg_len, 341e6ec361fSKent Overstreet unsigned nr_ptrs, unsigned state) 342e6ec361fSKent Overstreet { 343e6ec361fSKent Overstreet struct bch_page_state *s = bch2_page_state_create(page, __GFP_NOFAIL); 344e6ec361fSKent Overstreet unsigned i; 345e6ec361fSKent Overstreet 346e6ec361fSKent Overstreet BUG_ON(pg_offset >= PAGE_SECTORS); 347e6ec361fSKent Overstreet BUG_ON(pg_offset + pg_len > PAGE_SECTORS); 348e6ec361fSKent Overstreet 349e6ec361fSKent Overstreet spin_lock(&s->lock); 350e6ec361fSKent Overstreet 351e6ec361fSKent Overstreet for (i = pg_offset; i < pg_offset + pg_len; i++) { 352e6ec361fSKent Overstreet s->s[i].nr_replicas = nr_ptrs; 353e6ec361fSKent Overstreet s->s[i].state = state; 354e6ec361fSKent Overstreet } 355e6ec361fSKent Overstreet 356e6ec361fSKent Overstreet if (i == PAGE_SECTORS) 357e6ec361fSKent Overstreet s->uptodate = true; 358e6ec361fSKent Overstreet 359e6ec361fSKent Overstreet spin_unlock(&s->lock); 360e6ec361fSKent Overstreet } 361e6ec361fSKent Overstreet 362e6ec361fSKent Overstreet static int bch2_page_state_set(struct bch_fs *c, subvol_inum inum, 363e6ec361fSKent Overstreet struct page **pages, unsigned nr_pages) 364e6ec361fSKent Overstreet { 365e6ec361fSKent Overstreet struct btree_trans trans; 366e6ec361fSKent Overstreet struct btree_iter iter; 367e6ec361fSKent Overstreet struct bkey_s_c k; 368e6ec361fSKent Overstreet u64 offset = pages[0]->index << PAGE_SECTORS_SHIFT; 369e6ec361fSKent Overstreet unsigned pg_idx = 0; 370e6ec361fSKent Overstreet u32 snapshot; 371e6ec361fSKent Overstreet int ret; 372e6ec361fSKent Overstreet 373e6ec361fSKent Overstreet bch2_trans_init(&trans, c, 0, 0); 374e6ec361fSKent Overstreet retry: 375e6ec361fSKent Overstreet bch2_trans_begin(&trans); 376e6ec361fSKent Overstreet 377e6ec361fSKent Overstreet ret = bch2_subvolume_get_snapshot(&trans, inum.subvol, &snapshot); 378e6ec361fSKent Overstreet if (ret) 379e6ec361fSKent Overstreet goto err; 380e6ec361fSKent Overstreet 381e6ec361fSKent Overstreet for_each_btree_key_norestart(&trans, iter, BTREE_ID_extents, 382e6ec361fSKent Overstreet SPOS(inum.inum, offset, snapshot), 383e6ec361fSKent Overstreet BTREE_ITER_SLOTS, k, ret) { 384e6ec361fSKent Overstreet unsigned nr_ptrs = bch2_bkey_nr_ptrs_fully_allocated(k); 385e6ec361fSKent Overstreet unsigned state = bkey_to_sector_state(k.k); 386e6ec361fSKent Overstreet 387e6ec361fSKent Overstreet while (pg_idx < nr_pages) { 388e6ec361fSKent Overstreet struct page *page = pages[pg_idx]; 389e6ec361fSKent Overstreet u64 pg_start = page->index << PAGE_SECTORS_SHIFT; 390e6ec361fSKent Overstreet u64 pg_end = (page->index + 1) << PAGE_SECTORS_SHIFT; 391e6ec361fSKent Overstreet unsigned pg_offset = max(bkey_start_offset(k.k), pg_start) - pg_start; 392e6ec361fSKent Overstreet unsigned pg_len = min(k.k->p.offset, pg_end) - pg_offset - pg_start; 393e6ec361fSKent Overstreet 394e6ec361fSKent Overstreet BUG_ON(k.k->p.offset < pg_start); 395e6ec361fSKent Overstreet BUG_ON(bkey_start_offset(k.k) > pg_end); 396e6ec361fSKent Overstreet 397e6ec361fSKent Overstreet if (!bch2_page_state_create(page, __GFP_NOFAIL)->uptodate) 398e6ec361fSKent Overstreet __bch2_page_state_set(page, pg_offset, pg_len, nr_ptrs, state); 399e6ec361fSKent Overstreet 400e6ec361fSKent Overstreet if (k.k->p.offset < pg_end) 401e6ec361fSKent Overstreet break; 402e6ec361fSKent Overstreet pg_idx++; 403e6ec361fSKent Overstreet } 404e6ec361fSKent Overstreet 405e6ec361fSKent Overstreet if (pg_idx == nr_pages) 406e6ec361fSKent Overstreet break; 407e6ec361fSKent Overstreet } 408e6ec361fSKent Overstreet 409e6ec361fSKent Overstreet offset = iter.pos.offset; 410e6ec361fSKent Overstreet bch2_trans_iter_exit(&trans, &iter); 411e6ec361fSKent Overstreet err: 412549d173cSKent Overstreet if (bch2_err_matches(ret, BCH_ERR_transaction_restart)) 413e6ec361fSKent Overstreet goto retry; 414e6ec361fSKent Overstreet bch2_trans_exit(&trans); 415e6ec361fSKent Overstreet 416e6ec361fSKent Overstreet return ret; 417e6ec361fSKent Overstreet } 418e6ec361fSKent Overstreet 419b44a66a6SKent Overstreet static void bch2_bio_page_state_set(struct bio *bio, struct bkey_s_c k) 420b44a66a6SKent Overstreet { 421b44a66a6SKent Overstreet struct bvec_iter iter; 422b44a66a6SKent Overstreet struct bio_vec bv; 423b44a66a6SKent Overstreet unsigned nr_ptrs = k.k->type == KEY_TYPE_reflink_v 424b44a66a6SKent Overstreet ? 0 : bch2_bkey_nr_ptrs_fully_allocated(k); 425b44a66a6SKent Overstreet unsigned state = bkey_to_sector_state(k.k); 426b44a66a6SKent Overstreet 427e6ec361fSKent Overstreet bio_for_each_segment(bv, bio, iter) 428e6ec361fSKent Overstreet __bch2_page_state_set(bv.bv_page, bv.bv_offset >> 9, 429e6ec361fSKent Overstreet bv.bv_len >> 9, nr_ptrs, state); 430b44a66a6SKent Overstreet } 431b44a66a6SKent Overstreet 432dcfc593fSKent Overstreet static void mark_pagecache_unallocated(struct bch_inode_info *inode, 433dcfc593fSKent Overstreet u64 start, u64 end) 434dcfc593fSKent Overstreet { 435dcfc593fSKent Overstreet pgoff_t index = start >> PAGE_SECTORS_SHIFT; 436dcfc593fSKent Overstreet pgoff_t end_index = (end - 1) >> PAGE_SECTORS_SHIFT; 437dcfc593fSKent Overstreet struct folio_batch fbatch; 438dcfc593fSKent Overstreet unsigned i, j; 439dcfc593fSKent Overstreet 440dcfc593fSKent Overstreet if (end <= start) 441dcfc593fSKent Overstreet return; 442dcfc593fSKent Overstreet 443dcfc593fSKent Overstreet folio_batch_init(&fbatch); 444dcfc593fSKent Overstreet 445dcfc593fSKent Overstreet while (filemap_get_folios(inode->v.i_mapping, 446dcfc593fSKent Overstreet &index, end_index, &fbatch)) { 447dcfc593fSKent Overstreet for (i = 0; i < folio_batch_count(&fbatch); i++) { 448dcfc593fSKent Overstreet struct folio *folio = fbatch.folios[i]; 449dcfc593fSKent Overstreet u64 pg_start = folio->index << PAGE_SECTORS_SHIFT; 450dcfc593fSKent Overstreet u64 pg_end = (folio->index + 1) << PAGE_SECTORS_SHIFT; 451dcfc593fSKent Overstreet unsigned pg_offset = max(start, pg_start) - pg_start; 452dcfc593fSKent Overstreet unsigned pg_len = min(end, pg_end) - pg_offset - pg_start; 453dcfc593fSKent Overstreet struct bch_page_state *s; 454dcfc593fSKent Overstreet 455dcfc593fSKent Overstreet BUG_ON(end <= pg_start); 456dcfc593fSKent Overstreet BUG_ON(pg_offset >= PAGE_SECTORS); 457dcfc593fSKent Overstreet BUG_ON(pg_offset + pg_len > PAGE_SECTORS); 458dcfc593fSKent Overstreet 459dcfc593fSKent Overstreet folio_lock(folio); 460dcfc593fSKent Overstreet s = bch2_page_state(&folio->page); 461dcfc593fSKent Overstreet 462dcfc593fSKent Overstreet if (s) { 463dcfc593fSKent Overstreet spin_lock(&s->lock); 464dcfc593fSKent Overstreet for (j = pg_offset; j < pg_offset + pg_len; j++) 465dcfc593fSKent Overstreet s->s[j].nr_replicas = 0; 466dcfc593fSKent Overstreet spin_unlock(&s->lock); 467dcfc593fSKent Overstreet } 468dcfc593fSKent Overstreet 469dcfc593fSKent Overstreet folio_unlock(folio); 470dcfc593fSKent Overstreet } 471dcfc593fSKent Overstreet folio_batch_release(&fbatch); 472dcfc593fSKent Overstreet cond_resched(); 473dcfc593fSKent Overstreet } 474dcfc593fSKent Overstreet } 475dcfc593fSKent Overstreet 476dcfc593fSKent Overstreet static void mark_pagecache_reserved(struct bch_inode_info *inode, 477dcfc593fSKent Overstreet u64 start, u64 end) 478dcfc593fSKent Overstreet { 479dcfc593fSKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 480dcfc593fSKent Overstreet pgoff_t index = start >> PAGE_SECTORS_SHIFT; 481dcfc593fSKent Overstreet pgoff_t end_index = (end - 1) >> PAGE_SECTORS_SHIFT; 482dcfc593fSKent Overstreet struct folio_batch fbatch; 483dcfc593fSKent Overstreet s64 i_sectors_delta = 0; 484dcfc593fSKent Overstreet unsigned i, j; 485dcfc593fSKent Overstreet 486dcfc593fSKent Overstreet if (end <= start) 487dcfc593fSKent Overstreet return; 488dcfc593fSKent Overstreet 489dcfc593fSKent Overstreet folio_batch_init(&fbatch); 490dcfc593fSKent Overstreet 491dcfc593fSKent Overstreet while (filemap_get_folios(inode->v.i_mapping, 492dcfc593fSKent Overstreet &index, end_index, &fbatch)) { 493dcfc593fSKent Overstreet for (i = 0; i < folio_batch_count(&fbatch); i++) { 494dcfc593fSKent Overstreet struct folio *folio = fbatch.folios[i]; 495dcfc593fSKent Overstreet u64 pg_start = folio->index << PAGE_SECTORS_SHIFT; 496dcfc593fSKent Overstreet u64 pg_end = (folio->index + 1) << PAGE_SECTORS_SHIFT; 497dcfc593fSKent Overstreet unsigned pg_offset = max(start, pg_start) - pg_start; 498dcfc593fSKent Overstreet unsigned pg_len = min(end, pg_end) - pg_offset - pg_start; 499dcfc593fSKent Overstreet struct bch_page_state *s; 500dcfc593fSKent Overstreet 501dcfc593fSKent Overstreet BUG_ON(end <= pg_start); 502dcfc593fSKent Overstreet BUG_ON(pg_offset >= PAGE_SECTORS); 503dcfc593fSKent Overstreet BUG_ON(pg_offset + pg_len > PAGE_SECTORS); 504dcfc593fSKent Overstreet 505dcfc593fSKent Overstreet folio_lock(folio); 506dcfc593fSKent Overstreet s = bch2_page_state(&folio->page); 507dcfc593fSKent Overstreet 508dcfc593fSKent Overstreet if (s) { 509dcfc593fSKent Overstreet spin_lock(&s->lock); 510dcfc593fSKent Overstreet for (j = pg_offset; j < pg_offset + pg_len; j++) 511dcfc593fSKent Overstreet switch (s->s[j].state) { 512dcfc593fSKent Overstreet case SECTOR_UNALLOCATED: 513dcfc593fSKent Overstreet s->s[j].state = SECTOR_RESERVED; 514dcfc593fSKent Overstreet break; 515dcfc593fSKent Overstreet case SECTOR_DIRTY: 516dcfc593fSKent Overstreet s->s[j].state = SECTOR_DIRTY_RESERVED; 517dcfc593fSKent Overstreet i_sectors_delta--; 518dcfc593fSKent Overstreet break; 519dcfc593fSKent Overstreet default: 520dcfc593fSKent Overstreet break; 521dcfc593fSKent Overstreet } 522dcfc593fSKent Overstreet spin_unlock(&s->lock); 523dcfc593fSKent Overstreet } 524dcfc593fSKent Overstreet 525dcfc593fSKent Overstreet folio_unlock(folio); 526dcfc593fSKent Overstreet } 527dcfc593fSKent Overstreet folio_batch_release(&fbatch); 528dcfc593fSKent Overstreet cond_resched(); 529dcfc593fSKent Overstreet } 530dcfc593fSKent Overstreet 531dcfc593fSKent Overstreet i_sectors_acct(c, inode, NULL, i_sectors_delta); 532dcfc593fSKent Overstreet } 533dcfc593fSKent Overstreet 534e1036a2aSKent Overstreet static inline unsigned inode_nr_replicas(struct bch_fs *c, struct bch_inode_info *inode) 535e1036a2aSKent Overstreet { 536e1036a2aSKent Overstreet /* XXX: this should not be open coded */ 537e1036a2aSKent Overstreet return inode->ei_inode.bi_data_replicas 538e1036a2aSKent Overstreet ? inode->ei_inode.bi_data_replicas - 1 539e1036a2aSKent Overstreet : c->opts.data_replicas; 540e1036a2aSKent Overstreet } 541e1036a2aSKent Overstreet 542f57a6a5dSKent Overstreet static inline unsigned sectors_to_reserve(struct bch_page_sector *s, 543f57a6a5dSKent Overstreet unsigned nr_replicas) 544f57a6a5dSKent Overstreet { 545f57a6a5dSKent Overstreet return max(0, (int) nr_replicas - 546f57a6a5dSKent Overstreet s->nr_replicas - 547f57a6a5dSKent Overstreet s->replicas_reserved); 548f57a6a5dSKent Overstreet } 549f57a6a5dSKent Overstreet 550f57a6a5dSKent Overstreet static int bch2_get_page_disk_reservation(struct bch_fs *c, 551f57a6a5dSKent Overstreet struct bch_inode_info *inode, 5521c6fdbd8SKent Overstreet struct page *page, bool check_enospc) 5531c6fdbd8SKent Overstreet { 554f57a6a5dSKent Overstreet struct bch_page_state *s = bch2_page_state_create(page, 0); 555e1036a2aSKent Overstreet unsigned nr_replicas = inode_nr_replicas(c, inode); 556f57a6a5dSKent Overstreet struct disk_reservation disk_res = { 0 }; 557f57a6a5dSKent Overstreet unsigned i, disk_res_sectors = 0; 558f81b648dSKent Overstreet int ret; 5591c6fdbd8SKent Overstreet 560f57a6a5dSKent Overstreet if (!s) 561f57a6a5dSKent Overstreet return -ENOMEM; 5621c6fdbd8SKent Overstreet 563f57a6a5dSKent Overstreet for (i = 0; i < ARRAY_SIZE(s->s); i++) 564f57a6a5dSKent Overstreet disk_res_sectors += sectors_to_reserve(&s->s[i], nr_replicas); 565f57a6a5dSKent Overstreet 566f57a6a5dSKent Overstreet if (!disk_res_sectors) 567f57a6a5dSKent Overstreet return 0; 568f57a6a5dSKent Overstreet 569f57a6a5dSKent Overstreet ret = bch2_disk_reservation_get(c, &disk_res, 570f57a6a5dSKent Overstreet disk_res_sectors, 1, 571f57a6a5dSKent Overstreet !check_enospc 572f57a6a5dSKent Overstreet ? BCH_DISK_RESERVATION_NOFAIL 573f57a6a5dSKent Overstreet : 0); 5741c6fdbd8SKent Overstreet if (unlikely(ret)) 575f81b648dSKent Overstreet return ret; 576f81b648dSKent Overstreet 577f57a6a5dSKent Overstreet for (i = 0; i < ARRAY_SIZE(s->s); i++) 578f57a6a5dSKent Overstreet s->s[i].replicas_reserved += 579f57a6a5dSKent Overstreet sectors_to_reserve(&s->s[i], nr_replicas); 580f57a6a5dSKent Overstreet 581f57a6a5dSKent Overstreet return 0; 5821c6fdbd8SKent Overstreet } 5831c6fdbd8SKent Overstreet 584d1542e03SKent Overstreet struct bch2_page_reservation { 585d1542e03SKent Overstreet struct disk_reservation disk; 586d1542e03SKent Overstreet struct quota_res quota; 587d1542e03SKent Overstreet }; 588d1542e03SKent Overstreet 589d1542e03SKent Overstreet static void bch2_page_reservation_init(struct bch_fs *c, 590f57a6a5dSKent Overstreet struct bch_inode_info *inode, 591d1542e03SKent Overstreet struct bch2_page_reservation *res) 592d1542e03SKent Overstreet { 593d1542e03SKent Overstreet memset(res, 0, sizeof(*res)); 594d1542e03SKent Overstreet 595d1542e03SKent Overstreet res->disk.nr_replicas = inode_nr_replicas(c, inode); 596d1542e03SKent Overstreet } 597d1542e03SKent Overstreet 598d1542e03SKent Overstreet static void bch2_page_reservation_put(struct bch_fs *c, 599d1542e03SKent Overstreet struct bch_inode_info *inode, 600d1542e03SKent Overstreet struct bch2_page_reservation *res) 601d1542e03SKent Overstreet { 602d1542e03SKent Overstreet bch2_disk_reservation_put(c, &res->disk); 603d1542e03SKent Overstreet bch2_quota_reservation_put(c, inode, &res->quota); 604d1542e03SKent Overstreet } 605d1542e03SKent Overstreet 606d1542e03SKent Overstreet static int bch2_page_reservation_get(struct bch_fs *c, 607d1542e03SKent Overstreet struct bch_inode_info *inode, struct page *page, 608d1542e03SKent Overstreet struct bch2_page_reservation *res, 609bd954215SKent Overstreet unsigned offset, unsigned len) 610f57a6a5dSKent Overstreet { 611f57a6a5dSKent Overstreet struct bch_page_state *s = bch2_page_state_create(page, 0); 612d1542e03SKent Overstreet unsigned i, disk_sectors = 0, quota_sectors = 0; 613f57a6a5dSKent Overstreet int ret; 614f57a6a5dSKent Overstreet 615f57a6a5dSKent Overstreet if (!s) 616f57a6a5dSKent Overstreet return -ENOMEM; 617f57a6a5dSKent Overstreet 618e6ec361fSKent Overstreet BUG_ON(!s->uptodate); 619e6ec361fSKent Overstreet 6204b0a66d5SKent Overstreet for (i = round_down(offset, block_bytes(c)) >> 9; 6214b0a66d5SKent Overstreet i < round_up(offset + len, block_bytes(c)) >> 9; 622d1542e03SKent Overstreet i++) { 623d1542e03SKent Overstreet disk_sectors += sectors_to_reserve(&s->s[i], 624d1542e03SKent Overstreet res->disk.nr_replicas); 625d1542e03SKent Overstreet quota_sectors += s->s[i].state == SECTOR_UNALLOCATED; 6261c6fdbd8SKent Overstreet } 6271c6fdbd8SKent Overstreet 628d1542e03SKent Overstreet if (disk_sectors) { 629bd954215SKent Overstreet ret = bch2_disk_reservation_add(c, &res->disk, disk_sectors, 0); 630d1542e03SKent Overstreet if (unlikely(ret)) 631d1542e03SKent Overstreet return ret; 632d1542e03SKent Overstreet } 633d1542e03SKent Overstreet 634d1542e03SKent Overstreet if (quota_sectors) { 635d1542e03SKent Overstreet ret = bch2_quota_reservation_add(c, inode, &res->quota, 636bd954215SKent Overstreet quota_sectors, true); 637d1542e03SKent Overstreet if (unlikely(ret)) { 638d1542e03SKent Overstreet struct disk_reservation tmp = { 639d1542e03SKent Overstreet .sectors = disk_sectors 640d1542e03SKent Overstreet }; 641d1542e03SKent Overstreet 642d1542e03SKent Overstreet bch2_disk_reservation_put(c, &tmp); 643d1542e03SKent Overstreet res->disk.sectors -= disk_sectors; 644d1542e03SKent Overstreet return ret; 645d1542e03SKent Overstreet } 646d1542e03SKent Overstreet } 647d1542e03SKent Overstreet 648d1542e03SKent Overstreet return 0; 649f57a6a5dSKent Overstreet } 650f57a6a5dSKent Overstreet 6511c6fdbd8SKent Overstreet static void bch2_clear_page_bits(struct page *page) 6521c6fdbd8SKent Overstreet { 6531c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(page->mapping->host); 6541c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 655f57a6a5dSKent Overstreet struct bch_page_state *s = bch2_page_state(page); 656d1542e03SKent Overstreet struct disk_reservation disk_res = { 0 }; 657f57a6a5dSKent Overstreet int i, dirty_sectors = 0; 6581c6fdbd8SKent Overstreet 659f57a6a5dSKent Overstreet if (!s) 6601c6fdbd8SKent Overstreet return; 6611c6fdbd8SKent Overstreet 6623826ee0bSKent Overstreet EBUG_ON(!PageLocked(page)); 6633826ee0bSKent Overstreet EBUG_ON(PageWriteback(page)); 6643826ee0bSKent Overstreet 665f57a6a5dSKent Overstreet for (i = 0; i < ARRAY_SIZE(s->s); i++) { 666d1542e03SKent Overstreet disk_res.sectors += s->s[i].replicas_reserved; 667d1542e03SKent Overstreet s->s[i].replicas_reserved = 0; 668d1542e03SKent Overstreet 669b44a66a6SKent Overstreet switch (s->s[i].state) { 670b44a66a6SKent Overstreet case SECTOR_DIRTY: 671f57a6a5dSKent Overstreet s->s[i].state = SECTOR_UNALLOCATED; 672b44a66a6SKent Overstreet --dirty_sectors; 673b44a66a6SKent Overstreet break; 674b44a66a6SKent Overstreet case SECTOR_DIRTY_RESERVED: 675b44a66a6SKent Overstreet s->s[i].state = SECTOR_RESERVED; 676b44a66a6SKent Overstreet break; 677b44a66a6SKent Overstreet default: 678b44a66a6SKent Overstreet break; 679f57a6a5dSKent Overstreet } 680f57a6a5dSKent Overstreet } 681adfcfaf0SKent Overstreet 682d1542e03SKent Overstreet bch2_disk_reservation_put(c, &disk_res); 683d1542e03SKent Overstreet 684b44a66a6SKent Overstreet i_sectors_acct(c, inode, NULL, dirty_sectors); 685adfcfaf0SKent Overstreet 686f57a6a5dSKent Overstreet bch2_page_state_release(page); 6871c6fdbd8SKent Overstreet } 6881c6fdbd8SKent Overstreet 689d1542e03SKent Overstreet static void bch2_set_page_dirty(struct bch_fs *c, 690d1542e03SKent Overstreet struct bch_inode_info *inode, struct page *page, 691d1542e03SKent Overstreet struct bch2_page_reservation *res, 692d1542e03SKent Overstreet unsigned offset, unsigned len) 6931c6fdbd8SKent Overstreet { 694d1542e03SKent Overstreet struct bch_page_state *s = bch2_page_state(page); 695f57a6a5dSKent Overstreet unsigned i, dirty_sectors = 0; 6961c6fdbd8SKent Overstreet 697877dfb34SKent Overstreet WARN_ON((u64) page_offset(page) + offset + len > 698877dfb34SKent Overstreet round_up((u64) i_size_read(&inode->v), block_bytes(c))); 699fb472ac5SKent Overstreet 7003826ee0bSKent Overstreet spin_lock(&s->lock); 7013826ee0bSKent Overstreet 7024b0a66d5SKent Overstreet for (i = round_down(offset, block_bytes(c)) >> 9; 7034b0a66d5SKent Overstreet i < round_up(offset + len, block_bytes(c)) >> 9; 704d1542e03SKent Overstreet i++) { 705d1542e03SKent Overstreet unsigned sectors = sectors_to_reserve(&s->s[i], 706d1542e03SKent Overstreet res->disk.nr_replicas); 7071c6fdbd8SKent Overstreet 708406d6d5aSKent Overstreet /* 709406d6d5aSKent Overstreet * This can happen if we race with the error path in 710406d6d5aSKent Overstreet * bch2_writepage_io_done(): 711406d6d5aSKent Overstreet */ 712406d6d5aSKent Overstreet sectors = min_t(unsigned, sectors, res->disk.sectors); 713406d6d5aSKent Overstreet 714d1542e03SKent Overstreet s->s[i].replicas_reserved += sectors; 715d1542e03SKent Overstreet res->disk.sectors -= sectors; 716adfcfaf0SKent Overstreet 717b44a66a6SKent Overstreet switch (s->s[i].state) { 718b44a66a6SKent Overstreet case SECTOR_UNALLOCATED: 719b44a66a6SKent Overstreet s->s[i].state = SECTOR_DIRTY; 720f57a6a5dSKent Overstreet dirty_sectors++; 721b44a66a6SKent Overstreet break; 722b44a66a6SKent Overstreet case SECTOR_RESERVED: 723b44a66a6SKent Overstreet s->s[i].state = SECTOR_DIRTY_RESERVED; 724b44a66a6SKent Overstreet break; 725b44a66a6SKent Overstreet default: 726b44a66a6SKent Overstreet break; 727b44a66a6SKent Overstreet } 728f57a6a5dSKent Overstreet } 729f57a6a5dSKent Overstreet 7303826ee0bSKent Overstreet spin_unlock(&s->lock); 7313826ee0bSKent Overstreet 732d1542e03SKent Overstreet i_sectors_acct(c, inode, &res->quota, dirty_sectors); 7331c6fdbd8SKent Overstreet 734d1542e03SKent Overstreet if (!PageDirty(page)) 735d1542e03SKent Overstreet filemap_dirty_folio(inode->v.i_mapping, page_folio(page)); 7361c6fdbd8SKent Overstreet } 7371c6fdbd8SKent Overstreet 7381c6fdbd8SKent Overstreet vm_fault_t bch2_page_fault(struct vm_fault *vmf) 7391c6fdbd8SKent Overstreet { 7401c6fdbd8SKent Overstreet struct file *file = vmf->vma->vm_file; 741eb8e6e9cSKent Overstreet struct address_space *mapping = file->f_mapping; 742eb8e6e9cSKent Overstreet struct address_space *fdm = faults_disabled_mapping(); 7431c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 7441c6fdbd8SKent Overstreet int ret; 7451c6fdbd8SKent Overstreet 746eb8e6e9cSKent Overstreet if (fdm == mapping) 747eb8e6e9cSKent Overstreet return VM_FAULT_SIGBUS; 748eb8e6e9cSKent Overstreet 749eb8e6e9cSKent Overstreet /* Lock ordering: */ 750eb8e6e9cSKent Overstreet if (fdm > mapping) { 751eb8e6e9cSKent Overstreet struct bch_inode_info *fdm_host = to_bch_ei(fdm->host); 752eb8e6e9cSKent Overstreet 753eb8e6e9cSKent Overstreet if (bch2_pagecache_add_tryget(&inode->ei_pagecache_lock)) 754eb8e6e9cSKent Overstreet goto got_lock; 755eb8e6e9cSKent Overstreet 756eb8e6e9cSKent Overstreet bch2_pagecache_block_put(&fdm_host->ei_pagecache_lock); 757eb8e6e9cSKent Overstreet 7581c6fdbd8SKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 759eb8e6e9cSKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 760eb8e6e9cSKent Overstreet 761eb8e6e9cSKent Overstreet bch2_pagecache_block_get(&fdm_host->ei_pagecache_lock); 762eb8e6e9cSKent Overstreet 763eb8e6e9cSKent Overstreet /* Signal that lock has been dropped: */ 764eb8e6e9cSKent Overstreet set_fdm_dropped_locks(); 765eb8e6e9cSKent Overstreet return VM_FAULT_SIGBUS; 766eb8e6e9cSKent Overstreet } 767eb8e6e9cSKent Overstreet 768eb8e6e9cSKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 769eb8e6e9cSKent Overstreet got_lock: 7701c6fdbd8SKent Overstreet ret = filemap_fault(vmf); 7711c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 7721c6fdbd8SKent Overstreet 7731c6fdbd8SKent Overstreet return ret; 7741c6fdbd8SKent Overstreet } 7751c6fdbd8SKent Overstreet 7761c6fdbd8SKent Overstreet vm_fault_t bch2_page_mkwrite(struct vm_fault *vmf) 7771c6fdbd8SKent Overstreet { 7781c6fdbd8SKent Overstreet struct page *page = vmf->page; 7791c6fdbd8SKent Overstreet struct file *file = vmf->vma->vm_file; 7801c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 7811c6fdbd8SKent Overstreet struct address_space *mapping = file->f_mapping; 7821c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 783d1542e03SKent Overstreet struct bch2_page_reservation res; 7846cc3535dSKent Overstreet unsigned len; 7856cc3535dSKent Overstreet loff_t isize; 786e6ec361fSKent Overstreet int ret; 7871c6fdbd8SKent Overstreet 788d1542e03SKent Overstreet bch2_page_reservation_init(c, inode, &res); 789d1542e03SKent Overstreet 7901c6fdbd8SKent Overstreet sb_start_pagefault(inode->v.i_sb); 7911c6fdbd8SKent Overstreet file_update_time(file); 7921c6fdbd8SKent Overstreet 7931c6fdbd8SKent Overstreet /* 7941c6fdbd8SKent Overstreet * Not strictly necessary, but helps avoid dio writes livelocking in 7951c6fdbd8SKent Overstreet * write_invalidate_inode_pages_range() - can drop this if/when we get 7961c6fdbd8SKent Overstreet * a write_invalidate_inode_pages_range() that works without dropping 7971c6fdbd8SKent Overstreet * page lock before invalidating page 7981c6fdbd8SKent Overstreet */ 7991c6fdbd8SKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 8001c6fdbd8SKent Overstreet 8011c6fdbd8SKent Overstreet lock_page(page); 8026cc3535dSKent Overstreet isize = i_size_read(&inode->v); 8036cc3535dSKent Overstreet 8046cc3535dSKent Overstreet if (page->mapping != mapping || page_offset(page) >= isize) { 8051c6fdbd8SKent Overstreet unlock_page(page); 8061c6fdbd8SKent Overstreet ret = VM_FAULT_NOPAGE; 8071c6fdbd8SKent Overstreet goto out; 8081c6fdbd8SKent Overstreet } 8091c6fdbd8SKent Overstreet 810d55460bbSKent Overstreet len = min_t(loff_t, PAGE_SIZE, isize - page_offset(page)); 8116cc3535dSKent Overstreet 812e6ec361fSKent Overstreet if (!bch2_page_state_create(page, __GFP_NOFAIL)->uptodate) { 813e6ec361fSKent Overstreet if (bch2_page_state_set(c, inode_inum(inode), &page, 1)) { 814e6ec361fSKent Overstreet unlock_page(page); 815e6ec361fSKent Overstreet ret = VM_FAULT_SIGBUS; 816e6ec361fSKent Overstreet goto out; 817e6ec361fSKent Overstreet } 818e6ec361fSKent Overstreet } 819e6ec361fSKent Overstreet 820bd954215SKent Overstreet if (bch2_page_reservation_get(c, inode, page, &res, 0, len)) { 8211c6fdbd8SKent Overstreet unlock_page(page); 8221c6fdbd8SKent Overstreet ret = VM_FAULT_SIGBUS; 8231c6fdbd8SKent Overstreet goto out; 8241c6fdbd8SKent Overstreet } 8251c6fdbd8SKent Overstreet 8266cc3535dSKent Overstreet bch2_set_page_dirty(c, inode, page, &res, 0, len); 8271b783a69SKent Overstreet bch2_page_reservation_put(c, inode, &res); 8281b783a69SKent Overstreet 8291c6fdbd8SKent Overstreet wait_for_stable_page(page); 830e6ec361fSKent Overstreet ret = VM_FAULT_LOCKED; 8311c6fdbd8SKent Overstreet out: 8321c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 8331c6fdbd8SKent Overstreet sb_end_pagefault(inode->v.i_sb); 834d1542e03SKent Overstreet 8351c6fdbd8SKent Overstreet return ret; 8361c6fdbd8SKent Overstreet } 8371c6fdbd8SKent Overstreet 8381c6fdbd8SKent Overstreet void bch2_invalidate_folio(struct folio *folio, size_t offset, size_t length) 8391c6fdbd8SKent Overstreet { 8401c6fdbd8SKent Overstreet if (offset || length < folio_size(folio)) 8411c6fdbd8SKent Overstreet return; 8421c6fdbd8SKent Overstreet 8431c6fdbd8SKent Overstreet bch2_clear_page_bits(&folio->page); 8441c6fdbd8SKent Overstreet } 8451c6fdbd8SKent Overstreet 8461c6fdbd8SKent Overstreet bool bch2_release_folio(struct folio *folio, gfp_t gfp_mask) 8471c6fdbd8SKent Overstreet { 848a6d90385SKent Overstreet if (folio_test_dirty(folio) || folio_test_writeback(folio)) 8491c6fdbd8SKent Overstreet return false; 8501c6fdbd8SKent Overstreet 8511c6fdbd8SKent Overstreet bch2_clear_page_bits(&folio->page); 8521c6fdbd8SKent Overstreet return true; 8531c6fdbd8SKent Overstreet } 8541c6fdbd8SKent Overstreet 8551c6fdbd8SKent Overstreet /* readpage(s): */ 8561c6fdbd8SKent Overstreet 8571c6fdbd8SKent Overstreet static void bch2_readpages_end_io(struct bio *bio) 8581c6fdbd8SKent Overstreet { 8591c6fdbd8SKent Overstreet struct bvec_iter_all iter; 8601c6fdbd8SKent Overstreet struct bio_vec *bv; 8611c6fdbd8SKent Overstreet 8621c6fdbd8SKent Overstreet bio_for_each_segment_all(bv, bio, iter) { 8631c6fdbd8SKent Overstreet struct page *page = bv->bv_page; 8641c6fdbd8SKent Overstreet 8651c6fdbd8SKent Overstreet if (!bio->bi_status) { 8661c6fdbd8SKent Overstreet SetPageUptodate(page); 8671c6fdbd8SKent Overstreet } else { 8681c6fdbd8SKent Overstreet ClearPageUptodate(page); 8691c6fdbd8SKent Overstreet SetPageError(page); 8701c6fdbd8SKent Overstreet } 8711c6fdbd8SKent Overstreet unlock_page(page); 8721c6fdbd8SKent Overstreet } 8731c6fdbd8SKent Overstreet 8741c6fdbd8SKent Overstreet bio_put(bio); 8751c6fdbd8SKent Overstreet } 8761c6fdbd8SKent Overstreet 8771c6fdbd8SKent Overstreet struct readpages_iter { 8781c6fdbd8SKent Overstreet struct address_space *mapping; 8791c6fdbd8SKent Overstreet struct page **pages; 8801c6fdbd8SKent Overstreet unsigned nr_pages; 8811c6fdbd8SKent Overstreet unsigned idx; 8821c6fdbd8SKent Overstreet pgoff_t offset; 8831c6fdbd8SKent Overstreet }; 8841c6fdbd8SKent Overstreet 8851c6fdbd8SKent Overstreet static int readpages_iter_init(struct readpages_iter *iter, 8861c6fdbd8SKent Overstreet struct readahead_control *ractl) 8871c6fdbd8SKent Overstreet { 8881c6fdbd8SKent Overstreet unsigned i, nr_pages = readahead_count(ractl); 8891c6fdbd8SKent Overstreet 8901c6fdbd8SKent Overstreet memset(iter, 0, sizeof(*iter)); 8911c6fdbd8SKent Overstreet 8921c6fdbd8SKent Overstreet iter->mapping = ractl->mapping; 8931c6fdbd8SKent Overstreet iter->offset = readahead_index(ractl); 8941c6fdbd8SKent Overstreet iter->nr_pages = nr_pages; 8951c6fdbd8SKent Overstreet 8961c6fdbd8SKent Overstreet iter->pages = kmalloc_array(nr_pages, sizeof(struct page *), GFP_NOFS); 8971c6fdbd8SKent Overstreet if (!iter->pages) 8981c6fdbd8SKent Overstreet return -ENOMEM; 8991c6fdbd8SKent Overstreet 90089931472SKent Overstreet nr_pages = __readahead_batch(ractl, iter->pages, nr_pages); 9011c6fdbd8SKent Overstreet for (i = 0; i < nr_pages; i++) { 902f57a6a5dSKent Overstreet __bch2_page_state_create(iter->pages[i], __GFP_NOFAIL); 9031c6fdbd8SKent Overstreet put_page(iter->pages[i]); 9041c6fdbd8SKent Overstreet } 9051c6fdbd8SKent Overstreet 9061c6fdbd8SKent Overstreet return 0; 9071c6fdbd8SKent Overstreet } 9081c6fdbd8SKent Overstreet 9091c6fdbd8SKent Overstreet static inline struct page *readpage_iter_next(struct readpages_iter *iter) 9101c6fdbd8SKent Overstreet { 9111c6fdbd8SKent Overstreet if (iter->idx >= iter->nr_pages) 9121c6fdbd8SKent Overstreet return NULL; 9131c6fdbd8SKent Overstreet 9141c6fdbd8SKent Overstreet EBUG_ON(iter->pages[iter->idx]->index != iter->offset + iter->idx); 9151c6fdbd8SKent Overstreet 9161c6fdbd8SKent Overstreet return iter->pages[iter->idx]; 9171c6fdbd8SKent Overstreet } 9181c6fdbd8SKent Overstreet 91935189e09SKent Overstreet static bool extent_partial_reads_expensive(struct bkey_s_c k) 92035189e09SKent Overstreet { 92135189e09SKent Overstreet struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k); 92235189e09SKent Overstreet struct bch_extent_crc_unpacked crc; 92335189e09SKent Overstreet const union bch_extent_entry *i; 92435189e09SKent Overstreet 92535189e09SKent Overstreet bkey_for_each_crc(k.k, ptrs, crc, i) 92635189e09SKent Overstreet if (crc.csum_type || crc.compression_type) 92735189e09SKent Overstreet return true; 92835189e09SKent Overstreet return false; 92935189e09SKent Overstreet } 93035189e09SKent Overstreet 9311c6fdbd8SKent Overstreet static void readpage_bio_extend(struct readpages_iter *iter, 93276426098SKent Overstreet struct bio *bio, 93376426098SKent Overstreet unsigned sectors_this_extent, 9341c6fdbd8SKent Overstreet bool get_more) 9351c6fdbd8SKent Overstreet { 93676426098SKent Overstreet while (bio_sectors(bio) < sectors_this_extent && 9371c6fdbd8SKent Overstreet bio->bi_vcnt < bio->bi_max_vecs) { 9387279c1a2SKent Overstreet pgoff_t page_offset = bio_end_sector(bio) >> PAGE_SECTORS_SHIFT; 9391c6fdbd8SKent Overstreet struct page *page = readpage_iter_next(iter); 9401c6fdbd8SKent Overstreet int ret; 9411c6fdbd8SKent Overstreet 9421c6fdbd8SKent Overstreet if (page) { 9431c6fdbd8SKent Overstreet if (iter->offset + iter->idx != page_offset) 9441c6fdbd8SKent Overstreet break; 9451c6fdbd8SKent Overstreet 9461c6fdbd8SKent Overstreet iter->idx++; 9471c6fdbd8SKent Overstreet } else { 9481c6fdbd8SKent Overstreet if (!get_more) 9491c6fdbd8SKent Overstreet break; 9501c6fdbd8SKent Overstreet 9511c6fdbd8SKent Overstreet page = xa_load(&iter->mapping->i_pages, page_offset); 9521c6fdbd8SKent Overstreet if (page && !xa_is_value(page)) 9531c6fdbd8SKent Overstreet break; 9541c6fdbd8SKent Overstreet 9551c6fdbd8SKent Overstreet page = __page_cache_alloc(readahead_gfp_mask(iter->mapping)); 9561c6fdbd8SKent Overstreet if (!page) 9571c6fdbd8SKent Overstreet break; 9581c6fdbd8SKent Overstreet 959f57a6a5dSKent Overstreet if (!__bch2_page_state_create(page, 0)) { 960f57a6a5dSKent Overstreet put_page(page); 961f57a6a5dSKent Overstreet break; 962f57a6a5dSKent Overstreet } 9631c6fdbd8SKent Overstreet 9641c6fdbd8SKent Overstreet ret = add_to_page_cache_lru(page, iter->mapping, 9651c6fdbd8SKent Overstreet page_offset, GFP_NOFS); 9661c6fdbd8SKent Overstreet if (ret) { 967f57a6a5dSKent Overstreet __bch2_page_state_release(page); 9681c6fdbd8SKent Overstreet put_page(page); 9691c6fdbd8SKent Overstreet break; 9701c6fdbd8SKent Overstreet } 9711c6fdbd8SKent Overstreet 9721c6fdbd8SKent Overstreet put_page(page); 9731c6fdbd8SKent Overstreet } 9741c6fdbd8SKent Overstreet 975885678f6SKent Overstreet BUG_ON(!bio_add_page(bio, page, PAGE_SIZE, 0)); 9761c6fdbd8SKent Overstreet } 9771c6fdbd8SKent Overstreet } 9781c6fdbd8SKent Overstreet 9798c6d298aSKent Overstreet static void bchfs_read(struct btree_trans *trans, 9808c6d298aSKent Overstreet struct bch_read_bio *rbio, 9818c6d298aSKent Overstreet subvol_inum inum, 9821c6fdbd8SKent Overstreet struct readpages_iter *readpages_iter) 9831c6fdbd8SKent Overstreet { 9840f238367SKent Overstreet struct bch_fs *c = trans->c; 9858c6d298aSKent Overstreet struct btree_iter iter; 98607a1006aSKent Overstreet struct bkey_buf sk; 9871c6fdbd8SKent Overstreet int flags = BCH_READ_RETRY_IF_STALE| 9881c6fdbd8SKent Overstreet BCH_READ_MAY_PROMOTE; 9898c6d298aSKent Overstreet u32 snapshot; 99076426098SKent Overstreet int ret = 0; 9911c6fdbd8SKent Overstreet 9921c6fdbd8SKent Overstreet rbio->c = c; 9931c6fdbd8SKent Overstreet rbio->start_time = local_clock(); 9948c6d298aSKent Overstreet rbio->subvol = inum.subvol; 99535189e09SKent Overstreet 99607a1006aSKent Overstreet bch2_bkey_buf_init(&sk); 99776426098SKent Overstreet retry: 998700c25b3SKent Overstreet bch2_trans_begin(trans); 9998c6d298aSKent Overstreet iter = (struct btree_iter) { NULL }; 1000700c25b3SKent Overstreet 10018c6d298aSKent Overstreet ret = bch2_subvolume_get_snapshot(trans, inum.subvol, &snapshot); 10028c6d298aSKent Overstreet if (ret) 10038c6d298aSKent Overstreet goto err; 10048c6d298aSKent Overstreet 10058c6d298aSKent Overstreet bch2_trans_iter_init(trans, &iter, BTREE_ID_extents, 10068c6d298aSKent Overstreet SPOS(inum.inum, rbio->bio.bi_iter.bi_sector, snapshot), 100757cfdd8bSKent Overstreet BTREE_ITER_SLOTS); 10081c6fdbd8SKent Overstreet while (1) { 10091c6fdbd8SKent Overstreet struct bkey_s_c k; 101076426098SKent Overstreet unsigned bytes, sectors, offset_into_extent; 10115ff75ccbSKent Overstreet enum btree_id data_btree = BTREE_ID_extents; 10121c6fdbd8SKent Overstreet 10133737e0ddSKent Overstreet /* 10143737e0ddSKent Overstreet * read_extent -> io_time_reset may cause a transaction restart 10153737e0ddSKent Overstreet * without returning an error, we need to check for that here: 10163737e0ddSKent Overstreet */ 1017549d173cSKent Overstreet ret = bch2_trans_relock(trans); 1018549d173cSKent Overstreet if (ret) 10193737e0ddSKent Overstreet break; 10203737e0ddSKent Overstreet 10218c6d298aSKent Overstreet bch2_btree_iter_set_pos(&iter, 10228c6d298aSKent Overstreet POS(inum.inum, rbio->bio.bi_iter.bi_sector)); 10231c6fdbd8SKent Overstreet 10248c6d298aSKent Overstreet k = bch2_btree_iter_peek_slot(&iter); 102576426098SKent Overstreet ret = bkey_err(k); 102676426098SKent Overstreet if (ret) 102776426098SKent Overstreet break; 10281c6fdbd8SKent Overstreet 10298c6d298aSKent Overstreet offset_into_extent = iter.pos.offset - 103006ed8558SKent Overstreet bkey_start_offset(k.k); 103176426098SKent Overstreet sectors = k.k->size - offset_into_extent; 103276426098SKent Overstreet 103307a1006aSKent Overstreet bch2_bkey_buf_reassemble(&sk, c, k); 103413dcd4abSKent Overstreet 10355ff75ccbSKent Overstreet ret = bch2_read_indirect_extent(trans, &data_btree, 103622d8a33dSYuxuan Shui &offset_into_extent, &sk); 103776426098SKent Overstreet if (ret) 103876426098SKent Overstreet break; 103976426098SKent Overstreet 104013dcd4abSKent Overstreet k = bkey_i_to_s_c(sk.k); 104113dcd4abSKent Overstreet 104276426098SKent Overstreet sectors = min(sectors, k.k->size - offset_into_extent); 104376426098SKent Overstreet 104435189e09SKent Overstreet if (readpages_iter) 104535189e09SKent Overstreet readpage_bio_extend(readpages_iter, &rbio->bio, sectors, 104635189e09SKent Overstreet extent_partial_reads_expensive(k)); 10471c6fdbd8SKent Overstreet 104876426098SKent Overstreet bytes = min(sectors, bio_sectors(&rbio->bio)) << 9; 104906ed8558SKent Overstreet swap(rbio->bio.bi_iter.bi_size, bytes); 10501c6fdbd8SKent Overstreet 105106ed8558SKent Overstreet if (rbio->bio.bi_iter.bi_size == bytes) 10521c6fdbd8SKent Overstreet flags |= BCH_READ_LAST_FRAGMENT; 10531c6fdbd8SKent Overstreet 1054b44a66a6SKent Overstreet bch2_bio_page_state_set(&rbio->bio, k); 10551c6fdbd8SKent Overstreet 10568c6d298aSKent Overstreet bch2_read_extent(trans, rbio, iter.pos, 10575ff75ccbSKent Overstreet data_btree, k, offset_into_extent, flags); 10581c6fdbd8SKent Overstreet 10591c6fdbd8SKent Overstreet if (flags & BCH_READ_LAST_FRAGMENT) 106035189e09SKent Overstreet break; 10611c6fdbd8SKent Overstreet 106206ed8558SKent Overstreet swap(rbio->bio.bi_iter.bi_size, bytes); 106306ed8558SKent Overstreet bio_advance(&rbio->bio, bytes); 1064084d42bbSKent Overstreet 1065084d42bbSKent Overstreet ret = btree_trans_too_many_iters(trans); 1066084d42bbSKent Overstreet if (ret) 1067084d42bbSKent Overstreet break; 10681c6fdbd8SKent Overstreet } 10698c6d298aSKent Overstreet err: 10708c6d298aSKent Overstreet bch2_trans_iter_exit(trans, &iter); 107176426098SKent Overstreet 1072549d173cSKent Overstreet if (bch2_err_matches(ret, BCH_ERR_transaction_restart)) 107376426098SKent Overstreet goto retry; 107476426098SKent Overstreet 107535189e09SKent Overstreet if (ret) { 10768c6d298aSKent Overstreet bch_err_inum_ratelimited(c, inum.inum, 10770fefe8d8SKent Overstreet "read error %i from btree lookup", ret); 10780fefe8d8SKent Overstreet rbio->bio.bi_status = BLK_STS_IOERR; 107976426098SKent Overstreet bio_endio(&rbio->bio); 10801c6fdbd8SKent Overstreet } 10811c6fdbd8SKent Overstreet 108207a1006aSKent Overstreet bch2_bkey_buf_exit(&sk, c); 108335189e09SKent Overstreet } 108435189e09SKent Overstreet 10851c6fdbd8SKent Overstreet void bch2_readahead(struct readahead_control *ractl) 10861c6fdbd8SKent Overstreet { 10871c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(ractl->mapping->host); 10881c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 10899a3df993SKent Overstreet struct bch_io_opts opts = io_opts(c, &inode->ei_inode); 1090424eb881SKent Overstreet struct btree_trans trans; 10911c6fdbd8SKent Overstreet struct page *page; 10921c6fdbd8SKent Overstreet struct readpages_iter readpages_iter; 10931c6fdbd8SKent Overstreet int ret; 10941c6fdbd8SKent Overstreet 10951c6fdbd8SKent Overstreet ret = readpages_iter_init(&readpages_iter, ractl); 10961c6fdbd8SKent Overstreet BUG_ON(ret); 10971c6fdbd8SKent Overstreet 109820bceecbSKent Overstreet bch2_trans_init(&trans, c, 0, 0); 10991c6fdbd8SKent Overstreet 11001c6fdbd8SKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 11011c6fdbd8SKent Overstreet 11021c6fdbd8SKent Overstreet while ((page = readpage_iter_next(&readpages_iter))) { 11031c6fdbd8SKent Overstreet pgoff_t index = readpages_iter.offset + readpages_iter.idx; 11041c6fdbd8SKent Overstreet unsigned n = min_t(unsigned, 11051c6fdbd8SKent Overstreet readpages_iter.nr_pages - 11061c6fdbd8SKent Overstreet readpages_iter.idx, 11071c6fdbd8SKent Overstreet BIO_MAX_VECS); 11081c6fdbd8SKent Overstreet struct bch_read_bio *rbio = 11091c6fdbd8SKent Overstreet rbio_init(bio_alloc_bioset(NULL, n, REQ_OP_READ, 11101c6fdbd8SKent Overstreet GFP_NOFS, &c->bio_read), 11111c6fdbd8SKent Overstreet opts); 11121c6fdbd8SKent Overstreet 11131c6fdbd8SKent Overstreet readpages_iter.idx++; 11141c6fdbd8SKent Overstreet 11157279c1a2SKent Overstreet rbio->bio.bi_iter.bi_sector = (sector_t) index << PAGE_SECTORS_SHIFT; 11161c6fdbd8SKent Overstreet rbio->bio.bi_end_io = bch2_readpages_end_io; 1117885678f6SKent Overstreet BUG_ON(!bio_add_page(&rbio->bio, page, PAGE_SIZE, 0)); 11181c6fdbd8SKent Overstreet 11198c6d298aSKent Overstreet bchfs_read(&trans, rbio, inode_inum(inode), 11200f238367SKent Overstreet &readpages_iter); 11211c6fdbd8SKent Overstreet } 11221c6fdbd8SKent Overstreet 11231c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 1124424eb881SKent Overstreet 1125424eb881SKent Overstreet bch2_trans_exit(&trans); 11261c6fdbd8SKent Overstreet kfree(readpages_iter.pages); 11271c6fdbd8SKent Overstreet } 11281c6fdbd8SKent Overstreet 11291c6fdbd8SKent Overstreet static void __bchfs_readpage(struct bch_fs *c, struct bch_read_bio *rbio, 11308c6d298aSKent Overstreet subvol_inum inum, struct page *page) 11311c6fdbd8SKent Overstreet { 1132424eb881SKent Overstreet struct btree_trans trans; 11331c6fdbd8SKent Overstreet 1134f57a6a5dSKent Overstreet bch2_page_state_create(page, __GFP_NOFAIL); 11351c6fdbd8SKent Overstreet 11361c6fdbd8SKent Overstreet rbio->bio.bi_opf = REQ_OP_READ|REQ_SYNC; 11377f5e31e1SKent Overstreet rbio->bio.bi_iter.bi_sector = 11387279c1a2SKent Overstreet (sector_t) page->index << PAGE_SECTORS_SHIFT; 11397f5e31e1SKent Overstreet BUG_ON(!bio_add_page(&rbio->bio, page, PAGE_SIZE, 0)); 11401c6fdbd8SKent Overstreet 114120bceecbSKent Overstreet bch2_trans_init(&trans, c, 0, 0); 11428c6d298aSKent Overstreet bchfs_read(&trans, rbio, inum, NULL); 1143424eb881SKent Overstreet bch2_trans_exit(&trans); 11441c6fdbd8SKent Overstreet } 11451c6fdbd8SKent Overstreet 11461c6fdbd8SKent Overstreet static void bch2_read_single_page_end_io(struct bio *bio) 11471c6fdbd8SKent Overstreet { 11481c6fdbd8SKent Overstreet complete(bio->bi_private); 11491c6fdbd8SKent Overstreet } 11501c6fdbd8SKent Overstreet 11511c6fdbd8SKent Overstreet static int bch2_read_single_page(struct page *page, 11521c6fdbd8SKent Overstreet struct address_space *mapping) 11531c6fdbd8SKent Overstreet { 11541c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(mapping->host); 11551c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 11561c6fdbd8SKent Overstreet struct bch_read_bio *rbio; 11571c6fdbd8SKent Overstreet int ret; 11581c6fdbd8SKent Overstreet DECLARE_COMPLETION_ONSTACK(done); 11591c6fdbd8SKent Overstreet 11601c6fdbd8SKent Overstreet rbio = rbio_init(bio_alloc_bioset(NULL, 1, REQ_OP_READ, GFP_NOFS, &c->bio_read), 11619a3df993SKent Overstreet io_opts(c, &inode->ei_inode)); 11621c6fdbd8SKent Overstreet rbio->bio.bi_private = &done; 11631c6fdbd8SKent Overstreet rbio->bio.bi_end_io = bch2_read_single_page_end_io; 11641c6fdbd8SKent Overstreet 11658c6d298aSKent Overstreet __bchfs_readpage(c, rbio, inode_inum(inode), page); 11661c6fdbd8SKent Overstreet wait_for_completion(&done); 11671c6fdbd8SKent Overstreet 11681c6fdbd8SKent Overstreet ret = blk_status_to_errno(rbio->bio.bi_status); 11691c6fdbd8SKent Overstreet bio_put(&rbio->bio); 11701c6fdbd8SKent Overstreet 11711c6fdbd8SKent Overstreet if (ret < 0) 11721c6fdbd8SKent Overstreet return ret; 11731c6fdbd8SKent Overstreet 11741c6fdbd8SKent Overstreet SetPageUptodate(page); 11751c6fdbd8SKent Overstreet return 0; 11761c6fdbd8SKent Overstreet } 11771c6fdbd8SKent Overstreet 11781c6fdbd8SKent Overstreet int bch2_read_folio(struct file *file, struct folio *folio) 11791c6fdbd8SKent Overstreet { 11801c6fdbd8SKent Overstreet struct page *page = &folio->page; 11811c6fdbd8SKent Overstreet int ret; 11821c6fdbd8SKent Overstreet 11831c6fdbd8SKent Overstreet ret = bch2_read_single_page(page, page->mapping); 11841c6fdbd8SKent Overstreet folio_unlock(folio); 11855c1ef830SKent Overstreet return bch2_err_class(ret); 11861c6fdbd8SKent Overstreet } 11871c6fdbd8SKent Overstreet 11881c6fdbd8SKent Overstreet /* writepages: */ 11891c6fdbd8SKent Overstreet 11901c6fdbd8SKent Overstreet struct bch_writepage_state { 11911c6fdbd8SKent Overstreet struct bch_writepage_io *io; 11921c6fdbd8SKent Overstreet struct bch_io_opts opts; 11931c6fdbd8SKent Overstreet }; 11941c6fdbd8SKent Overstreet 11951c6fdbd8SKent Overstreet static inline struct bch_writepage_state bch_writepage_state_init(struct bch_fs *c, 11961c6fdbd8SKent Overstreet struct bch_inode_info *inode) 11971c6fdbd8SKent Overstreet { 11989a3df993SKent Overstreet return (struct bch_writepage_state) { 11999a3df993SKent Overstreet .opts = io_opts(c, &inode->ei_inode) 12009a3df993SKent Overstreet }; 12011c6fdbd8SKent Overstreet } 12021c6fdbd8SKent Overstreet 12039f311f21SKent Overstreet static void bch2_writepage_io_done(struct bch_write_op *op) 12041c6fdbd8SKent Overstreet { 12059f311f21SKent Overstreet struct bch_writepage_io *io = 12069f311f21SKent Overstreet container_of(op, struct bch_writepage_io, op); 12079a3df993SKent Overstreet struct bch_fs *c = io->op.c; 12089a3df993SKent Overstreet struct bio *bio = &io->op.wbio.bio; 12091c6fdbd8SKent Overstreet struct bvec_iter_all iter; 12101c6fdbd8SKent Overstreet struct bio_vec *bvec; 1211b3fce09cSKent Overstreet unsigned i; 12121c6fdbd8SKent Overstreet 12139a3df993SKent Overstreet if (io->op.error) { 121433c74e41SKent Overstreet set_bit(EI_INODE_ERROR, &io->inode->ei_flags); 121533c74e41SKent Overstreet 121675812e70SKent Overstreet bio_for_each_segment_all(bvec, bio, iter) { 1217b3fce09cSKent Overstreet struct bch_page_state *s; 1218b3fce09cSKent Overstreet 12191c6fdbd8SKent Overstreet SetPageError(bvec->bv_page); 122075812e70SKent Overstreet mapping_set_error(bvec->bv_page->mapping, -EIO); 1221b3fce09cSKent Overstreet 12223826ee0bSKent Overstreet s = __bch2_page_state(bvec->bv_page); 12233826ee0bSKent Overstreet spin_lock(&s->lock); 1224b3fce09cSKent Overstreet for (i = 0; i < PAGE_SECTORS; i++) 1225b3fce09cSKent Overstreet s->s[i].nr_replicas = 0; 12263826ee0bSKent Overstreet spin_unlock(&s->lock); 122775812e70SKent Overstreet } 12281c6fdbd8SKent Overstreet } 12291c6fdbd8SKent Overstreet 12304be1a412SKent Overstreet if (io->op.flags & BCH_WRITE_WROTE_DATA_INLINE) { 12314be1a412SKent Overstreet bio_for_each_segment_all(bvec, bio, iter) { 12324be1a412SKent Overstreet struct bch_page_state *s; 12334be1a412SKent Overstreet 12344be1a412SKent Overstreet s = __bch2_page_state(bvec->bv_page); 12354be1a412SKent Overstreet spin_lock(&s->lock); 12364be1a412SKent Overstreet for (i = 0; i < PAGE_SECTORS; i++) 12374be1a412SKent Overstreet s->s[i].nr_replicas = 0; 12384be1a412SKent Overstreet spin_unlock(&s->lock); 12394be1a412SKent Overstreet } 12404be1a412SKent Overstreet } 12414be1a412SKent Overstreet 12421c6fdbd8SKent Overstreet /* 12431c6fdbd8SKent Overstreet * racing with fallocate can cause us to add fewer sectors than 12441c6fdbd8SKent Overstreet * expected - but we shouldn't add more sectors than expected: 12451c6fdbd8SKent Overstreet */ 1246f8494d25SKent Overstreet WARN_ON_ONCE(io->op.i_sectors_delta > 0); 12471c6fdbd8SKent Overstreet 12481c6fdbd8SKent Overstreet /* 12491c6fdbd8SKent Overstreet * (error (due to going RO) halfway through a page can screw that up 12501c6fdbd8SKent Overstreet * slightly) 12511c6fdbd8SKent Overstreet * XXX wtf? 12529a3df993SKent Overstreet BUG_ON(io->op.op.i_sectors_delta >= PAGE_SECTORS); 12531c6fdbd8SKent Overstreet */ 12541c6fdbd8SKent Overstreet 12551c6fdbd8SKent Overstreet /* 12561c6fdbd8SKent Overstreet * PageWriteback is effectively our ref on the inode - fixup i_blocks 12571c6fdbd8SKent Overstreet * before calling end_page_writeback: 12581c6fdbd8SKent Overstreet */ 12599a3df993SKent Overstreet i_sectors_acct(c, io->inode, NULL, io->op.i_sectors_delta); 12601c6fdbd8SKent Overstreet 12617f5e31e1SKent Overstreet bio_for_each_segment_all(bvec, bio, iter) { 12627f5e31e1SKent Overstreet struct bch_page_state *s = __bch2_page_state(bvec->bv_page); 12637f5e31e1SKent Overstreet 12647f5e31e1SKent Overstreet if (atomic_dec_and_test(&s->write_count)) 12651c6fdbd8SKent Overstreet end_page_writeback(bvec->bv_page); 12667f5e31e1SKent Overstreet } 12671c6fdbd8SKent Overstreet 12689f311f21SKent Overstreet bio_put(&io->op.wbio.bio); 12691c6fdbd8SKent Overstreet } 12701c6fdbd8SKent Overstreet 12711c6fdbd8SKent Overstreet static void bch2_writepage_do_io(struct bch_writepage_state *w) 12721c6fdbd8SKent Overstreet { 12731c6fdbd8SKent Overstreet struct bch_writepage_io *io = w->io; 12741c6fdbd8SKent Overstreet 12751c6fdbd8SKent Overstreet w->io = NULL; 12769f311f21SKent Overstreet closure_call(&io->op.cl, bch2_write, NULL, NULL); 12771c6fdbd8SKent Overstreet } 12781c6fdbd8SKent Overstreet 12791c6fdbd8SKent Overstreet /* 12801c6fdbd8SKent Overstreet * Get a bch_writepage_io and add @page to it - appending to an existing one if 12811c6fdbd8SKent Overstreet * possible, else allocating a new one: 12821c6fdbd8SKent Overstreet */ 12831c6fdbd8SKent Overstreet static void bch2_writepage_io_alloc(struct bch_fs *c, 128450fe5bd6SKent Overstreet struct writeback_control *wbc, 12851c6fdbd8SKent Overstreet struct bch_writepage_state *w, 12861c6fdbd8SKent Overstreet struct bch_inode_info *inode, 12877f5e31e1SKent Overstreet u64 sector, 12881c6fdbd8SKent Overstreet unsigned nr_replicas) 12891c6fdbd8SKent Overstreet { 12901c6fdbd8SKent Overstreet struct bch_write_op *op; 12911c6fdbd8SKent Overstreet 12921c6fdbd8SKent Overstreet w->io = container_of(bio_alloc_bioset(NULL, BIO_MAX_VECS, 12931c6fdbd8SKent Overstreet REQ_OP_WRITE, 12941c6fdbd8SKent Overstreet GFP_NOFS, 12951c6fdbd8SKent Overstreet &c->writepage_bioset), 12969a3df993SKent Overstreet struct bch_writepage_io, op.wbio.bio); 12971c6fdbd8SKent Overstreet 12989a3df993SKent Overstreet w->io->inode = inode; 12999a3df993SKent Overstreet op = &w->io->op; 13009a3df993SKent Overstreet bch2_write_op_init(op, c, w->opts); 13019a3df993SKent Overstreet op->target = w->opts.foreground_target; 13021c6fdbd8SKent Overstreet op->nr_replicas = nr_replicas; 13031c6fdbd8SKent Overstreet op->res.nr_replicas = nr_replicas; 13041c6fdbd8SKent Overstreet op->write_point = writepoint_hashed(inode->ei_last_dirtied); 13058c6d298aSKent Overstreet op->subvol = inode->ei_subvol; 13067f5e31e1SKent Overstreet op->pos = POS(inode->v.i_ino, sector); 13079f311f21SKent Overstreet op->end_io = bch2_writepage_io_done; 13087f5e31e1SKent Overstreet op->wbio.bio.bi_iter.bi_sector = sector; 130950fe5bd6SKent Overstreet op->wbio.bio.bi_opf = wbc_to_write_flags(wbc); 13101c6fdbd8SKent Overstreet } 13111c6fdbd8SKent Overstreet 13121c6fdbd8SKent Overstreet static int __bch2_writepage(struct folio *folio, 13131c6fdbd8SKent Overstreet struct writeback_control *wbc, 13141c6fdbd8SKent Overstreet void *data) 13151c6fdbd8SKent Overstreet { 13161c6fdbd8SKent Overstreet struct page *page = &folio->page; 13171c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(page->mapping->host); 13181c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 13191c6fdbd8SKent Overstreet struct bch_writepage_state *w = data; 13207f5e31e1SKent Overstreet struct bch_page_state *s, orig; 13217f5e31e1SKent Overstreet unsigned i, offset, nr_replicas_this_write = U32_MAX; 13221c6fdbd8SKent Overstreet loff_t i_size = i_size_read(&inode->v); 13231c6fdbd8SKent Overstreet pgoff_t end_index = i_size >> PAGE_SHIFT; 1324e1036a2aSKent Overstreet int ret; 13251c6fdbd8SKent Overstreet 13261c6fdbd8SKent Overstreet EBUG_ON(!PageUptodate(page)); 13271c6fdbd8SKent Overstreet 13281c6fdbd8SKent Overstreet /* Is the page fully inside i_size? */ 13291c6fdbd8SKent Overstreet if (page->index < end_index) 13301c6fdbd8SKent Overstreet goto do_io; 13311c6fdbd8SKent Overstreet 13321c6fdbd8SKent Overstreet /* Is the page fully outside i_size? (truncate in progress) */ 13331c6fdbd8SKent Overstreet offset = i_size & (PAGE_SIZE - 1); 13341c6fdbd8SKent Overstreet if (page->index > end_index || !offset) { 13351c6fdbd8SKent Overstreet unlock_page(page); 13361c6fdbd8SKent Overstreet return 0; 13371c6fdbd8SKent Overstreet } 13381c6fdbd8SKent Overstreet 13391c6fdbd8SKent Overstreet /* 13401c6fdbd8SKent Overstreet * The page straddles i_size. It must be zeroed out on each and every 13411c6fdbd8SKent Overstreet * writepage invocation because it may be mmapped. "A file is mapped 13421c6fdbd8SKent Overstreet * in multiples of the page size. For a file that is not a multiple of 13431c6fdbd8SKent Overstreet * the page size, the remaining memory is zeroed when mapped, and 13441c6fdbd8SKent Overstreet * writes to that region are not written out to the file." 13451c6fdbd8SKent Overstreet */ 13461c6fdbd8SKent Overstreet zero_user_segment(page, offset, PAGE_SIZE); 13471c6fdbd8SKent Overstreet do_io: 1348f57a6a5dSKent Overstreet s = bch2_page_state_create(page, __GFP_NOFAIL); 1349f81b648dSKent Overstreet 1350f74a5051SKent Overstreet /* 1351f74a5051SKent Overstreet * Things get really hairy with errors during writeback: 1352f74a5051SKent Overstreet */ 1353f74a5051SKent Overstreet ret = bch2_get_page_disk_reservation(c, inode, page, false); 1354f74a5051SKent Overstreet BUG_ON(ret); 1355e1036a2aSKent Overstreet 13567f5e31e1SKent Overstreet /* Before unlocking the page, get copy of reservations: */ 1357f74a5051SKent Overstreet spin_lock(&s->lock); 13587f5e31e1SKent Overstreet orig = *s; 1359f74a5051SKent Overstreet spin_unlock(&s->lock); 13607f5e31e1SKent Overstreet 13617f5e31e1SKent Overstreet for (i = 0; i < PAGE_SECTORS; i++) { 13622ba5d38bSKent Overstreet if (s->s[i].state < SECTOR_DIRTY) 13637f5e31e1SKent Overstreet continue; 13647f5e31e1SKent Overstreet 1365f81b648dSKent Overstreet nr_replicas_this_write = 1366f57a6a5dSKent Overstreet min_t(unsigned, nr_replicas_this_write, 1367f57a6a5dSKent Overstreet s->s[i].nr_replicas + 1368f57a6a5dSKent Overstreet s->s[i].replicas_reserved); 13697f5e31e1SKent Overstreet } 13701c6fdbd8SKent Overstreet 1371f57a6a5dSKent Overstreet for (i = 0; i < PAGE_SECTORS; i++) { 13722ba5d38bSKent Overstreet if (s->s[i].state < SECTOR_DIRTY) 13737f5e31e1SKent Overstreet continue; 13747f5e31e1SKent Overstreet 1375f57a6a5dSKent Overstreet s->s[i].nr_replicas = w->opts.compression 1376f57a6a5dSKent Overstreet ? 0 : nr_replicas_this_write; 1377e1036a2aSKent Overstreet 1378f57a6a5dSKent Overstreet s->s[i].replicas_reserved = 0; 1379f57a6a5dSKent Overstreet s->s[i].state = SECTOR_ALLOCATED; 1380f57a6a5dSKent Overstreet } 13811c6fdbd8SKent Overstreet 13827f5e31e1SKent Overstreet BUG_ON(atomic_read(&s->write_count)); 13837f5e31e1SKent Overstreet atomic_set(&s->write_count, 1); 13847f5e31e1SKent Overstreet 13851c6fdbd8SKent Overstreet BUG_ON(PageWriteback(page)); 13861c6fdbd8SKent Overstreet set_page_writeback(page); 13877f5e31e1SKent Overstreet 13881c6fdbd8SKent Overstreet unlock_page(page); 13891c6fdbd8SKent Overstreet 13907f5e31e1SKent Overstreet offset = 0; 13917f5e31e1SKent Overstreet while (1) { 1392f74a5051SKent Overstreet unsigned sectors = 0, dirty_sectors = 0, reserved_sectors = 0; 13937f5e31e1SKent Overstreet u64 sector; 13947f5e31e1SKent Overstreet 13957f5e31e1SKent Overstreet while (offset < PAGE_SECTORS && 13962ba5d38bSKent Overstreet orig.s[offset].state < SECTOR_DIRTY) 13977f5e31e1SKent Overstreet offset++; 13987f5e31e1SKent Overstreet 13997f5e31e1SKent Overstreet if (offset == PAGE_SECTORS) 14007f5e31e1SKent Overstreet break; 14017f5e31e1SKent Overstreet 14027f5e31e1SKent Overstreet while (offset + sectors < PAGE_SECTORS && 1403f74a5051SKent Overstreet orig.s[offset + sectors].state >= SECTOR_DIRTY) { 1404f74a5051SKent Overstreet reserved_sectors += orig.s[offset + sectors].replicas_reserved; 1405f74a5051SKent Overstreet dirty_sectors += orig.s[offset + sectors].state == SECTOR_DIRTY; 14067f5e31e1SKent Overstreet sectors++; 14077f5e31e1SKent Overstreet } 1408f74a5051SKent Overstreet BUG_ON(!sectors); 1409f74a5051SKent Overstreet 14107279c1a2SKent Overstreet sector = ((u64) page->index << PAGE_SECTORS_SHIFT) + offset; 14117f5e31e1SKent Overstreet 14121c6fdbd8SKent Overstreet if (w->io && 14139a3df993SKent Overstreet (w->io->op.res.nr_replicas != nr_replicas_this_write || 14149a3df993SKent Overstreet bio_full(&w->io->op.wbio.bio, PAGE_SIZE) || 1415f59b3464SKent Overstreet w->io->op.wbio.bio.bi_iter.bi_size + (sectors << 9) >= 1416f59b3464SKent Overstreet (BIO_MAX_VECS * PAGE_SIZE) || 14179a3df993SKent Overstreet bio_end_sector(&w->io->op.wbio.bio) != sector)) 14181c6fdbd8SKent Overstreet bch2_writepage_do_io(w); 14191c6fdbd8SKent Overstreet 14201c6fdbd8SKent Overstreet if (!w->io) 142150fe5bd6SKent Overstreet bch2_writepage_io_alloc(c, wbc, w, inode, sector, 1422f81b648dSKent Overstreet nr_replicas_this_write); 14231c6fdbd8SKent Overstreet 14247f5e31e1SKent Overstreet atomic_inc(&s->write_count); 14257f5e31e1SKent Overstreet 14269a3df993SKent Overstreet BUG_ON(inode != w->io->inode); 14279a3df993SKent Overstreet BUG_ON(!bio_add_page(&w->io->op.wbio.bio, page, 14287f5e31e1SKent Overstreet sectors << 9, offset << 9)); 14291c6fdbd8SKent Overstreet 14306cc3535dSKent Overstreet /* Check for writing past i_size: */ 1431f8494d25SKent Overstreet WARN_ON_ONCE((bio_end_sector(&w->io->op.wbio.bio) << 9) > 143280fe580cSKent Overstreet round_up(i_size, block_bytes(c)) && 143380fe580cSKent Overstreet !test_bit(BCH_FS_EMERGENCY_RO, &c->flags)); 14346cc3535dSKent Overstreet 14359a3df993SKent Overstreet w->io->op.res.sectors += reserved_sectors; 14369a3df993SKent Overstreet w->io->op.i_sectors_delta -= dirty_sectors; 14371c6fdbd8SKent Overstreet w->io->op.new_i_size = i_size; 14381c6fdbd8SKent Overstreet 14397f5e31e1SKent Overstreet offset += sectors; 14407f5e31e1SKent Overstreet } 14417f5e31e1SKent Overstreet 14427f5e31e1SKent Overstreet if (atomic_dec_and_test(&s->write_count)) 14437f5e31e1SKent Overstreet end_page_writeback(page); 14447f5e31e1SKent Overstreet 14451c6fdbd8SKent Overstreet return 0; 14461c6fdbd8SKent Overstreet } 14471c6fdbd8SKent Overstreet 14481c6fdbd8SKent Overstreet int bch2_writepages(struct address_space *mapping, struct writeback_control *wbc) 14491c6fdbd8SKent Overstreet { 14501c6fdbd8SKent Overstreet struct bch_fs *c = mapping->host->i_sb->s_fs_info; 14511c6fdbd8SKent Overstreet struct bch_writepage_state w = 14521c6fdbd8SKent Overstreet bch_writepage_state_init(c, to_bch_ei(mapping->host)); 14531c6fdbd8SKent Overstreet struct blk_plug plug; 14541c6fdbd8SKent Overstreet int ret; 14551c6fdbd8SKent Overstreet 14561c6fdbd8SKent Overstreet blk_start_plug(&plug); 14571c6fdbd8SKent Overstreet ret = write_cache_pages(mapping, wbc, __bch2_writepage, &w); 14581c6fdbd8SKent Overstreet if (w.io) 14591c6fdbd8SKent Overstreet bch2_writepage_do_io(&w); 14601c6fdbd8SKent Overstreet blk_finish_plug(&plug); 14615c1ef830SKent Overstreet return bch2_err_class(ret); 14621c6fdbd8SKent Overstreet } 14631c6fdbd8SKent Overstreet 14641c6fdbd8SKent Overstreet /* buffered writes: */ 14651c6fdbd8SKent Overstreet 14661c6fdbd8SKent Overstreet int bch2_write_begin(struct file *file, struct address_space *mapping, 14671c6fdbd8SKent Overstreet loff_t pos, unsigned len, 14681c6fdbd8SKent Overstreet struct page **pagep, void **fsdata) 14691c6fdbd8SKent Overstreet { 14701c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(mapping->host); 14711c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 1472d1542e03SKent Overstreet struct bch2_page_reservation *res; 14731c6fdbd8SKent Overstreet pgoff_t index = pos >> PAGE_SHIFT; 14741c6fdbd8SKent Overstreet unsigned offset = pos & (PAGE_SIZE - 1); 14751c6fdbd8SKent Overstreet struct page *page; 14761c6fdbd8SKent Overstreet int ret = -ENOMEM; 14771c6fdbd8SKent Overstreet 1478d1542e03SKent Overstreet res = kmalloc(sizeof(*res), GFP_KERNEL); 1479d1542e03SKent Overstreet if (!res) 1480d1542e03SKent Overstreet return -ENOMEM; 1481d1542e03SKent Overstreet 1482d1542e03SKent Overstreet bch2_page_reservation_init(c, inode, res); 1483d1542e03SKent Overstreet *fsdata = res; 14841c6fdbd8SKent Overstreet 14851c6fdbd8SKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 14861c6fdbd8SKent Overstreet 14871c6fdbd8SKent Overstreet page = grab_cache_page_write_begin(mapping, index); 14881c6fdbd8SKent Overstreet if (!page) 14891c6fdbd8SKent Overstreet goto err_unlock; 14901c6fdbd8SKent Overstreet 14911c6fdbd8SKent Overstreet if (PageUptodate(page)) 14921c6fdbd8SKent Overstreet goto out; 14931c6fdbd8SKent Overstreet 14941c6fdbd8SKent Overstreet /* If we're writing entire page, don't need to read it in first: */ 14951c6fdbd8SKent Overstreet if (len == PAGE_SIZE) 14961c6fdbd8SKent Overstreet goto out; 14971c6fdbd8SKent Overstreet 14981c6fdbd8SKent Overstreet if (!offset && pos + len >= inode->v.i_size) { 14991c6fdbd8SKent Overstreet zero_user_segment(page, len, PAGE_SIZE); 15001c6fdbd8SKent Overstreet flush_dcache_page(page); 15011c6fdbd8SKent Overstreet goto out; 15021c6fdbd8SKent Overstreet } 15031c6fdbd8SKent Overstreet 15041c6fdbd8SKent Overstreet if (index > inode->v.i_size >> PAGE_SHIFT) { 15051c6fdbd8SKent Overstreet zero_user_segments(page, 0, offset, offset + len, PAGE_SIZE); 15061c6fdbd8SKent Overstreet flush_dcache_page(page); 15071c6fdbd8SKent Overstreet goto out; 15081c6fdbd8SKent Overstreet } 15091c6fdbd8SKent Overstreet readpage: 15101c6fdbd8SKent Overstreet ret = bch2_read_single_page(page, mapping); 15111c6fdbd8SKent Overstreet if (ret) 15121c6fdbd8SKent Overstreet goto err; 15131c6fdbd8SKent Overstreet out: 1514e6ec361fSKent Overstreet if (!bch2_page_state_create(page, __GFP_NOFAIL)->uptodate) { 1515e6ec361fSKent Overstreet ret = bch2_page_state_set(c, inode_inum(inode), &page, 1); 1516e6ec361fSKent Overstreet if (ret) 15173a4d3656SKent Overstreet goto err; 1518e6ec361fSKent Overstreet } 1519e6ec361fSKent Overstreet 1520bd954215SKent Overstreet ret = bch2_page_reservation_get(c, inode, page, res, offset, len); 15211c6fdbd8SKent Overstreet if (ret) { 15221c6fdbd8SKent Overstreet if (!PageUptodate(page)) { 15231c6fdbd8SKent Overstreet /* 15241c6fdbd8SKent Overstreet * If the page hasn't been read in, we won't know if we 15251c6fdbd8SKent Overstreet * actually need a reservation - we don't actually need 15261c6fdbd8SKent Overstreet * to read here, we just need to check if the page is 15271c6fdbd8SKent Overstreet * fully backed by uncompressed data: 15281c6fdbd8SKent Overstreet */ 15291c6fdbd8SKent Overstreet goto readpage; 15301c6fdbd8SKent Overstreet } 15311c6fdbd8SKent Overstreet 15321c6fdbd8SKent Overstreet goto err; 15331c6fdbd8SKent Overstreet } 15341c6fdbd8SKent Overstreet 15351c6fdbd8SKent Overstreet *pagep = page; 15361c6fdbd8SKent Overstreet return 0; 15371c6fdbd8SKent Overstreet err: 15381c6fdbd8SKent Overstreet unlock_page(page); 15391c6fdbd8SKent Overstreet put_page(page); 15401c6fdbd8SKent Overstreet *pagep = NULL; 15411c6fdbd8SKent Overstreet err_unlock: 15421c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 1543d1542e03SKent Overstreet kfree(res); 1544d1542e03SKent Overstreet *fsdata = NULL; 15455c1ef830SKent Overstreet return bch2_err_class(ret); 15461c6fdbd8SKent Overstreet } 15471c6fdbd8SKent Overstreet 15481c6fdbd8SKent Overstreet int bch2_write_end(struct file *file, struct address_space *mapping, 15491c6fdbd8SKent Overstreet loff_t pos, unsigned len, unsigned copied, 15501c6fdbd8SKent Overstreet struct page *page, void *fsdata) 15511c6fdbd8SKent Overstreet { 15521c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(mapping->host); 15531c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 1554d1542e03SKent Overstreet struct bch2_page_reservation *res = fsdata; 1555d1542e03SKent Overstreet unsigned offset = pos & (PAGE_SIZE - 1); 15561c6fdbd8SKent Overstreet 15571c6fdbd8SKent Overstreet lockdep_assert_held(&inode->v.i_rwsem); 15581c6fdbd8SKent Overstreet 15591c6fdbd8SKent Overstreet if (unlikely(copied < len && !PageUptodate(page))) { 15601c6fdbd8SKent Overstreet /* 15611c6fdbd8SKent Overstreet * The page needs to be read in, but that would destroy 15621c6fdbd8SKent Overstreet * our partial write - simplest thing is to just force 15631c6fdbd8SKent Overstreet * userspace to redo the write: 15641c6fdbd8SKent Overstreet */ 15651c6fdbd8SKent Overstreet zero_user(page, 0, PAGE_SIZE); 15661c6fdbd8SKent Overstreet flush_dcache_page(page); 15671c6fdbd8SKent Overstreet copied = 0; 15681c6fdbd8SKent Overstreet } 15691c6fdbd8SKent Overstreet 15701c6fdbd8SKent Overstreet spin_lock(&inode->v.i_lock); 15711c6fdbd8SKent Overstreet if (pos + copied > inode->v.i_size) 15721c6fdbd8SKent Overstreet i_size_write(&inode->v, pos + copied); 15731c6fdbd8SKent Overstreet spin_unlock(&inode->v.i_lock); 15741c6fdbd8SKent Overstreet 15751c6fdbd8SKent Overstreet if (copied) { 15761c6fdbd8SKent Overstreet if (!PageUptodate(page)) 15771c6fdbd8SKent Overstreet SetPageUptodate(page); 1578d1542e03SKent Overstreet 1579d1542e03SKent Overstreet bch2_set_page_dirty(c, inode, page, res, offset, copied); 15801c6fdbd8SKent Overstreet 15811c6fdbd8SKent Overstreet inode->ei_last_dirtied = (unsigned long) current; 15821c6fdbd8SKent Overstreet } 15831c6fdbd8SKent Overstreet 15841c6fdbd8SKent Overstreet unlock_page(page); 15851c6fdbd8SKent Overstreet put_page(page); 15861c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 15871c6fdbd8SKent Overstreet 1588d1542e03SKent Overstreet bch2_page_reservation_put(c, inode, res); 1589d1542e03SKent Overstreet kfree(res); 1590d1542e03SKent Overstreet 15911c6fdbd8SKent Overstreet return copied; 15921c6fdbd8SKent Overstreet } 15931c6fdbd8SKent Overstreet 15941c6fdbd8SKent Overstreet #define WRITE_BATCH_PAGES 32 15951c6fdbd8SKent Overstreet 15961c6fdbd8SKent Overstreet static int __bch2_buffered_write(struct bch_inode_info *inode, 15971c6fdbd8SKent Overstreet struct address_space *mapping, 15981c6fdbd8SKent Overstreet struct iov_iter *iter, 15991c6fdbd8SKent Overstreet loff_t pos, unsigned len) 16001c6fdbd8SKent Overstreet { 16011c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 16021c6fdbd8SKent Overstreet struct page *pages[WRITE_BATCH_PAGES]; 1603d1542e03SKent Overstreet struct bch2_page_reservation res; 16041c6fdbd8SKent Overstreet unsigned long index = pos >> PAGE_SHIFT; 16051c6fdbd8SKent Overstreet unsigned offset = pos & (PAGE_SIZE - 1); 16061c6fdbd8SKent Overstreet unsigned nr_pages = DIV_ROUND_UP(offset + len, PAGE_SIZE); 1607d1542e03SKent Overstreet unsigned i, reserved = 0, set_dirty = 0; 1608d1542e03SKent Overstreet unsigned copied = 0, nr_pages_copied = 0; 16091c6fdbd8SKent Overstreet int ret = 0; 16101c6fdbd8SKent Overstreet 16111c6fdbd8SKent Overstreet BUG_ON(!len); 16121c6fdbd8SKent Overstreet BUG_ON(nr_pages > ARRAY_SIZE(pages)); 16131c6fdbd8SKent Overstreet 1614d1542e03SKent Overstreet bch2_page_reservation_init(c, inode, &res); 1615d1542e03SKent Overstreet 16161c6fdbd8SKent Overstreet for (i = 0; i < nr_pages; i++) { 16171c6fdbd8SKent Overstreet pages[i] = grab_cache_page_write_begin(mapping, index + i); 16181c6fdbd8SKent Overstreet if (!pages[i]) { 16191c6fdbd8SKent Overstreet nr_pages = i; 16208de819f8SKent Overstreet if (!i) { 16211c6fdbd8SKent Overstreet ret = -ENOMEM; 16221c6fdbd8SKent Overstreet goto out; 16231c6fdbd8SKent Overstreet } 16248de819f8SKent Overstreet len = min_t(unsigned, len, 16258de819f8SKent Overstreet nr_pages * PAGE_SIZE - offset); 16268de819f8SKent Overstreet break; 16278de819f8SKent Overstreet } 16281c6fdbd8SKent Overstreet } 16291c6fdbd8SKent Overstreet 16301c6fdbd8SKent Overstreet if (offset && !PageUptodate(pages[0])) { 16311c6fdbd8SKent Overstreet ret = bch2_read_single_page(pages[0], mapping); 16321c6fdbd8SKent Overstreet if (ret) 16331c6fdbd8SKent Overstreet goto out; 16341c6fdbd8SKent Overstreet } 16351c6fdbd8SKent Overstreet 16361c6fdbd8SKent Overstreet if ((pos + len) & (PAGE_SIZE - 1) && 16371c6fdbd8SKent Overstreet !PageUptodate(pages[nr_pages - 1])) { 16381c6fdbd8SKent Overstreet if ((index + nr_pages - 1) << PAGE_SHIFT >= inode->v.i_size) { 16391c6fdbd8SKent Overstreet zero_user(pages[nr_pages - 1], 0, PAGE_SIZE); 16401c6fdbd8SKent Overstreet } else { 16411c6fdbd8SKent Overstreet ret = bch2_read_single_page(pages[nr_pages - 1], mapping); 16421c6fdbd8SKent Overstreet if (ret) 16431c6fdbd8SKent Overstreet goto out; 16441c6fdbd8SKent Overstreet } 16451c6fdbd8SKent Overstreet } 16461c6fdbd8SKent Overstreet 1647d1542e03SKent Overstreet while (reserved < len) { 1648e6ec361fSKent Overstreet unsigned i = (offset + reserved) >> PAGE_SHIFT; 1649e6ec361fSKent Overstreet struct page *page = pages[i]; 1650d1542e03SKent Overstreet unsigned pg_offset = (offset + reserved) & (PAGE_SIZE - 1); 1651d1542e03SKent Overstreet unsigned pg_len = min_t(unsigned, len - reserved, 1652d1542e03SKent Overstreet PAGE_SIZE - pg_offset); 16531c6fdbd8SKent Overstreet 1654e6ec361fSKent Overstreet if (!bch2_page_state_create(page, __GFP_NOFAIL)->uptodate) { 1655e6ec361fSKent Overstreet ret = bch2_page_state_set(c, inode_inum(inode), 1656e6ec361fSKent Overstreet pages + i, nr_pages - i); 1657e6ec361fSKent Overstreet if (ret) 1658e6ec361fSKent Overstreet goto out; 16591c6fdbd8SKent Overstreet } 16601c6fdbd8SKent Overstreet 1661353448f3SKent Overstreet /* 1662353448f3SKent Overstreet * XXX: per POSIX and fstests generic/275, on -ENOSPC we're 1663353448f3SKent Overstreet * supposed to write as much as we have disk space for. 1664353448f3SKent Overstreet * 1665353448f3SKent Overstreet * On failure here we should still write out a partial page if 1666353448f3SKent Overstreet * we aren't completely out of disk space - we don't do that 1667353448f3SKent Overstreet * yet: 1668353448f3SKent Overstreet */ 1669e6ec361fSKent Overstreet ret = bch2_page_reservation_get(c, inode, page, &res, 1670bd954215SKent Overstreet pg_offset, pg_len); 1671353448f3SKent Overstreet if (unlikely(ret)) { 1672353448f3SKent Overstreet if (!reserved) 16731c6fdbd8SKent Overstreet goto out; 1674353448f3SKent Overstreet break; 1675353448f3SKent Overstreet } 1676d1542e03SKent Overstreet 1677d1542e03SKent Overstreet reserved += pg_len; 16781c6fdbd8SKent Overstreet } 16791c6fdbd8SKent Overstreet 16801c6fdbd8SKent Overstreet if (mapping_writably_mapped(mapping)) 16811c6fdbd8SKent Overstreet for (i = 0; i < nr_pages; i++) 16821c6fdbd8SKent Overstreet flush_dcache_page(pages[i]); 16831c6fdbd8SKent Overstreet 1684353448f3SKent Overstreet while (copied < reserved) { 16851c6fdbd8SKent Overstreet struct page *page = pages[(offset + copied) >> PAGE_SHIFT]; 16861c6fdbd8SKent Overstreet unsigned pg_offset = (offset + copied) & (PAGE_SIZE - 1); 1687353448f3SKent Overstreet unsigned pg_len = min_t(unsigned, reserved - copied, 16881c6fdbd8SKent Overstreet PAGE_SIZE - pg_offset); 16891c6fdbd8SKent Overstreet unsigned pg_copied = copy_page_from_iter_atomic(page, 1690d1542e03SKent Overstreet pg_offset, pg_len, iter); 1691d1542e03SKent Overstreet 1692d1542e03SKent Overstreet if (!pg_copied) 1693d1542e03SKent Overstreet break; 16941c6fdbd8SKent Overstreet 1695912bdf17SKent Overstreet if (!PageUptodate(page) && 1696912bdf17SKent Overstreet pg_copied != PAGE_SIZE && 1697912bdf17SKent Overstreet pos + copied + pg_copied < inode->v.i_size) { 1698912bdf17SKent Overstreet zero_user(page, 0, PAGE_SIZE); 1699912bdf17SKent Overstreet break; 1700912bdf17SKent Overstreet } 1701912bdf17SKent Overstreet 17021c6fdbd8SKent Overstreet flush_dcache_page(page); 17031c6fdbd8SKent Overstreet copied += pg_copied; 1704912bdf17SKent Overstreet 1705912bdf17SKent Overstreet if (pg_copied != pg_len) 1706912bdf17SKent Overstreet break; 17071c6fdbd8SKent Overstreet } 17081c6fdbd8SKent Overstreet 17091c6fdbd8SKent Overstreet if (!copied) 17101c6fdbd8SKent Overstreet goto out; 17111c6fdbd8SKent Overstreet 1712877dfb34SKent Overstreet spin_lock(&inode->v.i_lock); 1713877dfb34SKent Overstreet if (pos + copied > inode->v.i_size) 1714877dfb34SKent Overstreet i_size_write(&inode->v, pos + copied); 1715877dfb34SKent Overstreet spin_unlock(&inode->v.i_lock); 1716877dfb34SKent Overstreet 1717d1542e03SKent Overstreet while (set_dirty < copied) { 1718d1542e03SKent Overstreet struct page *page = pages[(offset + set_dirty) >> PAGE_SHIFT]; 1719d1542e03SKent Overstreet unsigned pg_offset = (offset + set_dirty) & (PAGE_SIZE - 1); 1720d1542e03SKent Overstreet unsigned pg_len = min_t(unsigned, copied - set_dirty, 1721d1542e03SKent Overstreet PAGE_SIZE - pg_offset); 1722d1542e03SKent Overstreet 1723d1542e03SKent Overstreet if (!PageUptodate(page)) 1724d1542e03SKent Overstreet SetPageUptodate(page); 1725d1542e03SKent Overstreet 1726d1542e03SKent Overstreet bch2_set_page_dirty(c, inode, page, &res, pg_offset, pg_len); 1727d1542e03SKent Overstreet unlock_page(page); 1728d1542e03SKent Overstreet put_page(page); 1729d1542e03SKent Overstreet 1730d1542e03SKent Overstreet set_dirty += pg_len; 1731d1542e03SKent Overstreet } 1732877dfb34SKent Overstreet 1733877dfb34SKent Overstreet nr_pages_copied = DIV_ROUND_UP(offset + copied, PAGE_SIZE); 1734877dfb34SKent Overstreet inode->ei_last_dirtied = (unsigned long) current; 17351c6fdbd8SKent Overstreet out: 1736d1542e03SKent Overstreet for (i = nr_pages_copied; i < nr_pages; i++) { 17371c6fdbd8SKent Overstreet unlock_page(pages[i]); 17381c6fdbd8SKent Overstreet put_page(pages[i]); 17391c6fdbd8SKent Overstreet } 17401c6fdbd8SKent Overstreet 1741d1542e03SKent Overstreet bch2_page_reservation_put(c, inode, &res); 17421c6fdbd8SKent Overstreet 17431c6fdbd8SKent Overstreet return copied ?: ret; 17441c6fdbd8SKent Overstreet } 17451c6fdbd8SKent Overstreet 17461c6fdbd8SKent Overstreet static ssize_t bch2_buffered_write(struct kiocb *iocb, struct iov_iter *iter) 17471c6fdbd8SKent Overstreet { 17481c6fdbd8SKent Overstreet struct file *file = iocb->ki_filp; 17491c6fdbd8SKent Overstreet struct address_space *mapping = file->f_mapping; 17501c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 17511c6fdbd8SKent Overstreet loff_t pos = iocb->ki_pos; 17521c6fdbd8SKent Overstreet ssize_t written = 0; 17531c6fdbd8SKent Overstreet int ret = 0; 17541c6fdbd8SKent Overstreet 17551c6fdbd8SKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 17561c6fdbd8SKent Overstreet 17571c6fdbd8SKent Overstreet do { 17581c6fdbd8SKent Overstreet unsigned offset = pos & (PAGE_SIZE - 1); 17591c6fdbd8SKent Overstreet unsigned bytes = min_t(unsigned long, iov_iter_count(iter), 17601c6fdbd8SKent Overstreet PAGE_SIZE * WRITE_BATCH_PAGES - offset); 17611c6fdbd8SKent Overstreet again: 17621c6fdbd8SKent Overstreet /* 17631c6fdbd8SKent Overstreet * Bring in the user page that we will copy from _first_. 17641c6fdbd8SKent Overstreet * Otherwise there's a nasty deadlock on copying from the 17651c6fdbd8SKent Overstreet * same page as we're writing to, without it being marked 17661c6fdbd8SKent Overstreet * up-to-date. 17671c6fdbd8SKent Overstreet * 17681c6fdbd8SKent Overstreet * Not only is this an optimisation, but it is also required 17691c6fdbd8SKent Overstreet * to check that the address is actually valid, when atomic 17701c6fdbd8SKent Overstreet * usercopies are used, below. 17711c6fdbd8SKent Overstreet */ 17721c6fdbd8SKent Overstreet if (unlikely(fault_in_iov_iter_readable(iter, bytes))) { 17731c6fdbd8SKent Overstreet bytes = min_t(unsigned long, iov_iter_count(iter), 17741c6fdbd8SKent Overstreet PAGE_SIZE - offset); 17751c6fdbd8SKent Overstreet 17761c6fdbd8SKent Overstreet if (unlikely(fault_in_iov_iter_readable(iter, bytes))) { 17771c6fdbd8SKent Overstreet ret = -EFAULT; 17781c6fdbd8SKent Overstreet break; 17791c6fdbd8SKent Overstreet } 17801c6fdbd8SKent Overstreet } 17811c6fdbd8SKent Overstreet 17821c6fdbd8SKent Overstreet if (unlikely(fatal_signal_pending(current))) { 17831c6fdbd8SKent Overstreet ret = -EINTR; 17841c6fdbd8SKent Overstreet break; 17851c6fdbd8SKent Overstreet } 17861c6fdbd8SKent Overstreet 17871c6fdbd8SKent Overstreet ret = __bch2_buffered_write(inode, mapping, iter, pos, bytes); 17881c6fdbd8SKent Overstreet if (unlikely(ret < 0)) 17891c6fdbd8SKent Overstreet break; 17901c6fdbd8SKent Overstreet 17911c6fdbd8SKent Overstreet cond_resched(); 17921c6fdbd8SKent Overstreet 17931c6fdbd8SKent Overstreet if (unlikely(ret == 0)) { 17941c6fdbd8SKent Overstreet /* 17951c6fdbd8SKent Overstreet * If we were unable to copy any data at all, we must 17961c6fdbd8SKent Overstreet * fall back to a single segment length write. 17971c6fdbd8SKent Overstreet * 17981c6fdbd8SKent Overstreet * If we didn't fallback here, we could livelock 17991c6fdbd8SKent Overstreet * because not all segments in the iov can be copied at 18001c6fdbd8SKent Overstreet * once without a pagefault. 18011c6fdbd8SKent Overstreet */ 18021c6fdbd8SKent Overstreet bytes = min_t(unsigned long, PAGE_SIZE - offset, 18031c6fdbd8SKent Overstreet iov_iter_single_seg_count(iter)); 18041c6fdbd8SKent Overstreet goto again; 18051c6fdbd8SKent Overstreet } 18061c6fdbd8SKent Overstreet pos += ret; 18071c6fdbd8SKent Overstreet written += ret; 1808912bdf17SKent Overstreet ret = 0; 18091c6fdbd8SKent Overstreet 18101c6fdbd8SKent Overstreet balance_dirty_pages_ratelimited(mapping); 18111c6fdbd8SKent Overstreet } while (iov_iter_count(iter)); 18121c6fdbd8SKent Overstreet 18131c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 18141c6fdbd8SKent Overstreet 18151c6fdbd8SKent Overstreet return written ? written : ret; 18161c6fdbd8SKent Overstreet } 18171c6fdbd8SKent Overstreet 18181c6fdbd8SKent Overstreet /* O_DIRECT reads */ 18191c6fdbd8SKent Overstreet 1820b4725cc1SKent Overstreet static void bio_check_or_release(struct bio *bio, bool check_dirty) 1821b4725cc1SKent Overstreet { 1822b4725cc1SKent Overstreet if (check_dirty) { 1823b4725cc1SKent Overstreet bio_check_pages_dirty(bio); 1824b4725cc1SKent Overstreet } else { 1825b4725cc1SKent Overstreet bio_release_pages(bio, false); 1826b4725cc1SKent Overstreet bio_put(bio); 1827b4725cc1SKent Overstreet } 1828b4725cc1SKent Overstreet } 1829b4725cc1SKent Overstreet 18301c6fdbd8SKent Overstreet static void bch2_dio_read_complete(struct closure *cl) 18311c6fdbd8SKent Overstreet { 18321c6fdbd8SKent Overstreet struct dio_read *dio = container_of(cl, struct dio_read, cl); 18331c6fdbd8SKent Overstreet 18341c6fdbd8SKent Overstreet dio->req->ki_complete(dio->req, dio->ret); 1835b4725cc1SKent Overstreet bio_check_or_release(&dio->rbio.bio, dio->should_dirty); 18361c6fdbd8SKent Overstreet } 18371c6fdbd8SKent Overstreet 18381c6fdbd8SKent Overstreet static void bch2_direct_IO_read_endio(struct bio *bio) 18391c6fdbd8SKent Overstreet { 18401c6fdbd8SKent Overstreet struct dio_read *dio = bio->bi_private; 18411c6fdbd8SKent Overstreet 18421c6fdbd8SKent Overstreet if (bio->bi_status) 18431c6fdbd8SKent Overstreet dio->ret = blk_status_to_errno(bio->bi_status); 18441c6fdbd8SKent Overstreet 18451c6fdbd8SKent Overstreet closure_put(&dio->cl); 18461c6fdbd8SKent Overstreet } 18471c6fdbd8SKent Overstreet 18481c6fdbd8SKent Overstreet static void bch2_direct_IO_read_split_endio(struct bio *bio) 18491c6fdbd8SKent Overstreet { 1850b4725cc1SKent Overstreet struct dio_read *dio = bio->bi_private; 1851b4725cc1SKent Overstreet bool should_dirty = dio->should_dirty; 1852b4725cc1SKent Overstreet 18531c6fdbd8SKent Overstreet bch2_direct_IO_read_endio(bio); 1854b4725cc1SKent Overstreet bio_check_or_release(bio, should_dirty); 18551c6fdbd8SKent Overstreet } 18561c6fdbd8SKent Overstreet 18571c6fdbd8SKent Overstreet static int bch2_direct_IO_read(struct kiocb *req, struct iov_iter *iter) 18581c6fdbd8SKent Overstreet { 18591c6fdbd8SKent Overstreet struct file *file = req->ki_filp; 18601c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 18611c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 18629a3df993SKent Overstreet struct bch_io_opts opts = io_opts(c, &inode->ei_inode); 18631c6fdbd8SKent Overstreet struct dio_read *dio; 18641c6fdbd8SKent Overstreet struct bio *bio; 18651c6fdbd8SKent Overstreet loff_t offset = req->ki_pos; 18661c6fdbd8SKent Overstreet bool sync = is_sync_kiocb(req); 18671c6fdbd8SKent Overstreet size_t shorten; 18681c6fdbd8SKent Overstreet ssize_t ret; 18691c6fdbd8SKent Overstreet 18701c6fdbd8SKent Overstreet if ((offset|iter->count) & (block_bytes(c) - 1)) 18711c6fdbd8SKent Overstreet return -EINVAL; 18721c6fdbd8SKent Overstreet 18731c6fdbd8SKent Overstreet ret = min_t(loff_t, iter->count, 18741c6fdbd8SKent Overstreet max_t(loff_t, 0, i_size_read(&inode->v) - offset)); 18751c6fdbd8SKent Overstreet 18761c6fdbd8SKent Overstreet if (!ret) 18771c6fdbd8SKent Overstreet return ret; 18781c6fdbd8SKent Overstreet 18791c6fdbd8SKent Overstreet shorten = iov_iter_count(iter) - round_up(ret, block_bytes(c)); 18801c6fdbd8SKent Overstreet iter->count -= shorten; 18811c6fdbd8SKent Overstreet 18821c6fdbd8SKent Overstreet bio = bio_alloc_bioset(NULL, 18834d126dc8SKent Overstreet bio_iov_vecs_to_alloc(iter, BIO_MAX_VECS), 18841c6fdbd8SKent Overstreet REQ_OP_READ, 18851c6fdbd8SKent Overstreet GFP_KERNEL, 18861c6fdbd8SKent Overstreet &c->dio_read_bioset); 18871c6fdbd8SKent Overstreet 18881c6fdbd8SKent Overstreet bio->bi_end_io = bch2_direct_IO_read_endio; 18891c6fdbd8SKent Overstreet 18901c6fdbd8SKent Overstreet dio = container_of(bio, struct dio_read, rbio.bio); 18911c6fdbd8SKent Overstreet closure_init(&dio->cl, NULL); 18921c6fdbd8SKent Overstreet 18931c6fdbd8SKent Overstreet /* 18941c6fdbd8SKent Overstreet * this is a _really_ horrible hack just to avoid an atomic sub at the 18951c6fdbd8SKent Overstreet * end: 18961c6fdbd8SKent Overstreet */ 18971c6fdbd8SKent Overstreet if (!sync) { 18981c6fdbd8SKent Overstreet set_closure_fn(&dio->cl, bch2_dio_read_complete, NULL); 18991c6fdbd8SKent Overstreet atomic_set(&dio->cl.remaining, 19001c6fdbd8SKent Overstreet CLOSURE_REMAINING_INITIALIZER - 19011c6fdbd8SKent Overstreet CLOSURE_RUNNING + 19021c6fdbd8SKent Overstreet CLOSURE_DESTRUCTOR); 19031c6fdbd8SKent Overstreet } else { 19041c6fdbd8SKent Overstreet atomic_set(&dio->cl.remaining, 19051c6fdbd8SKent Overstreet CLOSURE_REMAINING_INITIALIZER + 1); 19061c6fdbd8SKent Overstreet } 19071c6fdbd8SKent Overstreet 19081c6fdbd8SKent Overstreet dio->req = req; 19091c6fdbd8SKent Overstreet dio->ret = ret; 1910b4725cc1SKent Overstreet /* 1911b4725cc1SKent Overstreet * This is one of the sketchier things I've encountered: we have to skip 1912b4725cc1SKent Overstreet * the dirtying of requests that are internal from the kernel (i.e. from 1913b4725cc1SKent Overstreet * loopback), because we'll deadlock on page_lock. 1914b4725cc1SKent Overstreet */ 1915b4725cc1SKent Overstreet dio->should_dirty = iter_is_iovec(iter); 19161c6fdbd8SKent Overstreet 19171c6fdbd8SKent Overstreet goto start; 19181c6fdbd8SKent Overstreet while (iter->count) { 19191c6fdbd8SKent Overstreet bio = bio_alloc_bioset(NULL, 19204d126dc8SKent Overstreet bio_iov_vecs_to_alloc(iter, BIO_MAX_VECS), 19211c6fdbd8SKent Overstreet REQ_OP_READ, 19221c6fdbd8SKent Overstreet GFP_KERNEL, 19231c6fdbd8SKent Overstreet &c->bio_read); 19241c6fdbd8SKent Overstreet bio->bi_end_io = bch2_direct_IO_read_split_endio; 19251c6fdbd8SKent Overstreet start: 19261c6fdbd8SKent Overstreet bio->bi_opf = REQ_OP_READ|REQ_SYNC; 19271c6fdbd8SKent Overstreet bio->bi_iter.bi_sector = offset >> 9; 19281c6fdbd8SKent Overstreet bio->bi_private = dio; 19291c6fdbd8SKent Overstreet 19301c6fdbd8SKent Overstreet ret = bio_iov_iter_get_pages(bio, iter); 19311c6fdbd8SKent Overstreet if (ret < 0) { 19321c6fdbd8SKent Overstreet /* XXX: fault inject this path */ 19331c6fdbd8SKent Overstreet bio->bi_status = BLK_STS_RESOURCE; 19341c6fdbd8SKent Overstreet bio_endio(bio); 19351c6fdbd8SKent Overstreet break; 19361c6fdbd8SKent Overstreet } 19371c6fdbd8SKent Overstreet 19381c6fdbd8SKent Overstreet offset += bio->bi_iter.bi_size; 1939b4725cc1SKent Overstreet 1940b4725cc1SKent Overstreet if (dio->should_dirty) 19411c6fdbd8SKent Overstreet bio_set_pages_dirty(bio); 19421c6fdbd8SKent Overstreet 19431c6fdbd8SKent Overstreet if (iter->count) 19441c6fdbd8SKent Overstreet closure_get(&dio->cl); 19451c6fdbd8SKent Overstreet 19468c6d298aSKent Overstreet bch2_read(c, rbio_init(bio, opts), inode_inum(inode)); 19471c6fdbd8SKent Overstreet } 19481c6fdbd8SKent Overstreet 19491c6fdbd8SKent Overstreet iter->count += shorten; 19501c6fdbd8SKent Overstreet 19511c6fdbd8SKent Overstreet if (sync) { 19521c6fdbd8SKent Overstreet closure_sync(&dio->cl); 19531c6fdbd8SKent Overstreet closure_debug_destroy(&dio->cl); 19541c6fdbd8SKent Overstreet ret = dio->ret; 1955b4725cc1SKent Overstreet bio_check_or_release(&dio->rbio.bio, dio->should_dirty); 19561c6fdbd8SKent Overstreet return ret; 19571c6fdbd8SKent Overstreet } else { 19581c6fdbd8SKent Overstreet return -EIOCBQUEUED; 19591c6fdbd8SKent Overstreet } 19601c6fdbd8SKent Overstreet } 19611c6fdbd8SKent Overstreet 19621c6fdbd8SKent Overstreet ssize_t bch2_read_iter(struct kiocb *iocb, struct iov_iter *iter) 19631c6fdbd8SKent Overstreet { 19641c6fdbd8SKent Overstreet struct file *file = iocb->ki_filp; 19651c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 19661c6fdbd8SKent Overstreet struct address_space *mapping = file->f_mapping; 19671c6fdbd8SKent Overstreet size_t count = iov_iter_count(iter); 19681c6fdbd8SKent Overstreet ssize_t ret; 19691c6fdbd8SKent Overstreet 19701c6fdbd8SKent Overstreet if (!count) 19711c6fdbd8SKent Overstreet return 0; /* skip atime */ 19721c6fdbd8SKent Overstreet 19731c6fdbd8SKent Overstreet if (iocb->ki_flags & IOCB_DIRECT) { 19741c6fdbd8SKent Overstreet struct blk_plug plug; 19751c6fdbd8SKent Overstreet 1976a023127aSKent Overstreet if (unlikely(mapping->nrpages)) { 19771c6fdbd8SKent Overstreet ret = filemap_write_and_wait_range(mapping, 19781c6fdbd8SKent Overstreet iocb->ki_pos, 19791c6fdbd8SKent Overstreet iocb->ki_pos + count - 1); 19801c6fdbd8SKent Overstreet if (ret < 0) 19815c1ef830SKent Overstreet goto out; 1982a023127aSKent Overstreet } 19831c6fdbd8SKent Overstreet 19841c6fdbd8SKent Overstreet file_accessed(file); 19851c6fdbd8SKent Overstreet 19861c6fdbd8SKent Overstreet blk_start_plug(&plug); 19871c6fdbd8SKent Overstreet ret = bch2_direct_IO_read(iocb, iter); 19881c6fdbd8SKent Overstreet blk_finish_plug(&plug); 19891c6fdbd8SKent Overstreet 19901c6fdbd8SKent Overstreet if (ret >= 0) 19911c6fdbd8SKent Overstreet iocb->ki_pos += ret; 19921c6fdbd8SKent Overstreet } else { 19931c6fdbd8SKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 19941c6fdbd8SKent Overstreet ret = generic_file_read_iter(iocb, iter); 19951c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 19961c6fdbd8SKent Overstreet } 19975c1ef830SKent Overstreet out: 19985c1ef830SKent Overstreet return bch2_err_class(ret); 19991c6fdbd8SKent Overstreet } 20001c6fdbd8SKent Overstreet 20011c6fdbd8SKent Overstreet /* O_DIRECT writes */ 20021c6fdbd8SKent Overstreet 20036fed42bbSKent Overstreet static bool bch2_check_range_allocated(struct bch_fs *c, subvol_inum inum, 20046fed42bbSKent Overstreet u64 offset, u64 size, 20056fed42bbSKent Overstreet unsigned nr_replicas, bool compressed) 20066fed42bbSKent Overstreet { 20076fed42bbSKent Overstreet struct btree_trans trans; 20086fed42bbSKent Overstreet struct btree_iter iter; 20096fed42bbSKent Overstreet struct bkey_s_c k; 20106fed42bbSKent Overstreet u64 end = offset + size; 20116fed42bbSKent Overstreet u32 snapshot; 20126fed42bbSKent Overstreet bool ret = true; 20136fed42bbSKent Overstreet int err; 20146fed42bbSKent Overstreet 20156fed42bbSKent Overstreet bch2_trans_init(&trans, c, 0, 0); 20166fed42bbSKent Overstreet retry: 20176fed42bbSKent Overstreet bch2_trans_begin(&trans); 20186fed42bbSKent Overstreet 20196fed42bbSKent Overstreet err = bch2_subvolume_get_snapshot(&trans, inum.subvol, &snapshot); 20206fed42bbSKent Overstreet if (err) 20216fed42bbSKent Overstreet goto err; 20226fed42bbSKent Overstreet 2023e5fa91d7SKent Overstreet for_each_btree_key_norestart(&trans, iter, BTREE_ID_extents, 20246fed42bbSKent Overstreet SPOS(inum.inum, offset, snapshot), 20256fed42bbSKent Overstreet BTREE_ITER_SLOTS, k, err) { 20266fed42bbSKent Overstreet if (bkey_cmp(bkey_start_pos(k.k), POS(inum.inum, end)) >= 0) 20276fed42bbSKent Overstreet break; 20286fed42bbSKent Overstreet 20298c6d298aSKent Overstreet if (k.k->p.snapshot != snapshot || 20308c6d298aSKent Overstreet nr_replicas > bch2_bkey_replicas(c, k) || 20316fed42bbSKent Overstreet (!compressed && bch2_bkey_sectors_compressed(k))) { 20326fed42bbSKent Overstreet ret = false; 20336fed42bbSKent Overstreet break; 20346fed42bbSKent Overstreet } 20356fed42bbSKent Overstreet } 20366fed42bbSKent Overstreet 20376fed42bbSKent Overstreet offset = iter.pos.offset; 20386fed42bbSKent Overstreet bch2_trans_iter_exit(&trans, &iter); 20396fed42bbSKent Overstreet err: 2040549d173cSKent Overstreet if (bch2_err_matches(err, BCH_ERR_transaction_restart)) 20416fed42bbSKent Overstreet goto retry; 20426fed42bbSKent Overstreet bch2_trans_exit(&trans); 20436fed42bbSKent Overstreet 20446fed42bbSKent Overstreet return err ? false : ret; 20456fed42bbSKent Overstreet } 20466fed42bbSKent Overstreet 2047*182c7bbfSKent Overstreet static noinline bool bch2_dio_write_check_allocated(struct dio_write *dio) 2048*182c7bbfSKent Overstreet { 2049*182c7bbfSKent Overstreet struct bch_fs *c = dio->op.c; 2050*182c7bbfSKent Overstreet struct bch_inode_info *inode = dio->inode; 2051*182c7bbfSKent Overstreet struct bio *bio = &dio->op.wbio.bio; 2052*182c7bbfSKent Overstreet 2053*182c7bbfSKent Overstreet return bch2_check_range_allocated(c, inode_inum(inode), 2054*182c7bbfSKent Overstreet dio->op.pos.offset, bio_sectors(bio), 2055*182c7bbfSKent Overstreet dio->op.opts.data_replicas, 2056*182c7bbfSKent Overstreet dio->op.opts.compression != 0); 2057*182c7bbfSKent Overstreet } 2058*182c7bbfSKent Overstreet 20591c6fdbd8SKent Overstreet /* 20601c6fdbd8SKent Overstreet * We're going to return -EIOCBQUEUED, but we haven't finished consuming the 20611c6fdbd8SKent Overstreet * iov_iter yet, so we need to stash a copy of the iovec: it might be on the 20621c6fdbd8SKent Overstreet * caller's stack, we're not guaranteed that it will live for the duration of 20631c6fdbd8SKent Overstreet * the IO: 20641c6fdbd8SKent Overstreet */ 20651c6fdbd8SKent Overstreet static noinline int bch2_dio_write_copy_iov(struct dio_write *dio) 20661c6fdbd8SKent Overstreet { 20671c6fdbd8SKent Overstreet struct iovec *iov = dio->inline_vecs; 20681c6fdbd8SKent Overstreet 20691c6fdbd8SKent Overstreet /* 20701c6fdbd8SKent Overstreet * iov_iter has a single embedded iovec - nothing to do: 20711c6fdbd8SKent Overstreet */ 20721c6fdbd8SKent Overstreet if (iter_is_ubuf(&dio->iter)) 20731c6fdbd8SKent Overstreet return 0; 20741c6fdbd8SKent Overstreet 20751c6fdbd8SKent Overstreet /* 20761c6fdbd8SKent Overstreet * We don't currently handle non-iovec iov_iters here - return an error, 20771c6fdbd8SKent Overstreet * and we'll fall back to doing the IO synchronously: 20781c6fdbd8SKent Overstreet */ 20791c6fdbd8SKent Overstreet if (!iter_is_iovec(&dio->iter)) 20801c6fdbd8SKent Overstreet return -1; 20811c6fdbd8SKent Overstreet 20821c6fdbd8SKent Overstreet if (dio->iter.nr_segs > ARRAY_SIZE(dio->inline_vecs)) { 20831c6fdbd8SKent Overstreet iov = kmalloc_array(dio->iter.nr_segs, sizeof(*iov), 20841c6fdbd8SKent Overstreet GFP_KERNEL); 20851c6fdbd8SKent Overstreet if (unlikely(!iov)) 20861c6fdbd8SKent Overstreet return -ENOMEM; 20871c6fdbd8SKent Overstreet 20881c6fdbd8SKent Overstreet dio->free_iov = true; 20891c6fdbd8SKent Overstreet } 20901c6fdbd8SKent Overstreet 20911c6fdbd8SKent Overstreet memcpy(iov, dio->iter.__iov, dio->iter.nr_segs * sizeof(*iov)); 20921c6fdbd8SKent Overstreet dio->iter.__iov = iov; 20931c6fdbd8SKent Overstreet return 0; 20941c6fdbd8SKent Overstreet } 20951c6fdbd8SKent Overstreet 2096042a1f26SKent Overstreet static void bch2_dio_write_loop_async(struct bch_write_op *); 2097042a1f26SKent Overstreet 2098*182c7bbfSKent Overstreet static __always_inline long bch2_dio_write_done(struct dio_write *dio) 2099*182c7bbfSKent Overstreet { 2100*182c7bbfSKent Overstreet struct bch_fs *c = dio->op.c; 2101*182c7bbfSKent Overstreet struct kiocb *req = dio->req; 2102*182c7bbfSKent Overstreet struct bch_inode_info *inode = dio->inode; 2103*182c7bbfSKent Overstreet bool sync = dio->sync; 2104*182c7bbfSKent Overstreet long ret = dio->op.error ?: ((long) dio->written << 9); 2105*182c7bbfSKent Overstreet 2106*182c7bbfSKent Overstreet bch2_pagecache_block_put(&inode->ei_pagecache_lock); 2107*182c7bbfSKent Overstreet bch2_quota_reservation_put(c, inode, &dio->quota_res); 2108*182c7bbfSKent Overstreet 2109*182c7bbfSKent Overstreet if (dio->free_iov) 2110*182c7bbfSKent Overstreet kfree(dio->iter.__iov); 2111*182c7bbfSKent Overstreet bio_put(&dio->op.wbio.bio); 2112*182c7bbfSKent Overstreet 2113*182c7bbfSKent Overstreet /* inode->i_dio_count is our ref on inode and thus bch_fs */ 2114*182c7bbfSKent Overstreet inode_dio_end(&inode->v); 2115*182c7bbfSKent Overstreet 2116*182c7bbfSKent Overstreet if (ret < 0) 2117*182c7bbfSKent Overstreet ret = bch2_err_class(ret); 2118*182c7bbfSKent Overstreet 2119*182c7bbfSKent Overstreet if (!sync) { 2120*182c7bbfSKent Overstreet req->ki_complete(req, ret); 2121*182c7bbfSKent Overstreet ret = -EIOCBQUEUED; 2122*182c7bbfSKent Overstreet } 2123*182c7bbfSKent Overstreet return ret; 2124*182c7bbfSKent Overstreet } 2125*182c7bbfSKent Overstreet 2126*182c7bbfSKent Overstreet static __always_inline void bch2_dio_write_end(struct dio_write *dio) 2127*182c7bbfSKent Overstreet { 2128*182c7bbfSKent Overstreet struct bch_fs *c = dio->op.c; 2129*182c7bbfSKent Overstreet struct kiocb *req = dio->req; 2130*182c7bbfSKent Overstreet struct bch_inode_info *inode = dio->inode; 2131*182c7bbfSKent Overstreet struct bio *bio = &dio->op.wbio.bio; 2132*182c7bbfSKent Overstreet 2133*182c7bbfSKent Overstreet i_sectors_acct(c, inode, &dio->quota_res, dio->op.i_sectors_delta); 2134*182c7bbfSKent Overstreet req->ki_pos += (u64) dio->op.written << 9; 2135*182c7bbfSKent Overstreet dio->written += dio->op.written; 2136*182c7bbfSKent Overstreet 2137*182c7bbfSKent Overstreet spin_lock(&inode->v.i_lock); 2138*182c7bbfSKent Overstreet if (req->ki_pos > inode->v.i_size) 2139*182c7bbfSKent Overstreet i_size_write(&inode->v, req->ki_pos); 2140*182c7bbfSKent Overstreet spin_unlock(&inode->v.i_lock); 2141*182c7bbfSKent Overstreet 2142*182c7bbfSKent Overstreet bio_release_pages(bio, false); 2143*182c7bbfSKent Overstreet 2144*182c7bbfSKent Overstreet if (unlikely(dio->op.error)) 2145*182c7bbfSKent Overstreet set_bit(EI_INODE_ERROR, &inode->ei_flags); 2146*182c7bbfSKent Overstreet } 2147*182c7bbfSKent Overstreet 21481c6fdbd8SKent Overstreet static long bch2_dio_write_loop(struct dio_write *dio) 21491c6fdbd8SKent Overstreet { 2150*182c7bbfSKent Overstreet struct bch_fs *c = dio->op.c; 21511c6fdbd8SKent Overstreet struct kiocb *req = dio->req; 2152*182c7bbfSKent Overstreet struct address_space *mapping = dio->mapping; 2153*182c7bbfSKent Overstreet struct bch_inode_info *inode = dio->inode; 21549a3df993SKent Overstreet struct bio *bio = &dio->op.wbio.bio; 2155eb8e6e9cSKent Overstreet unsigned unaligned, iter_count; 2156eb8e6e9cSKent Overstreet bool sync = dio->sync, dropped_locks; 21571c6fdbd8SKent Overstreet long ret; 21581c6fdbd8SKent Overstreet 21591c6fdbd8SKent Overstreet while (1) { 2160eb8e6e9cSKent Overstreet iter_count = dio->iter.count; 2161eb8e6e9cSKent Overstreet 2162*182c7bbfSKent Overstreet EBUG_ON(current->faults_disabled_mapping); 21631c6fdbd8SKent Overstreet current->faults_disabled_mapping = mapping; 21641c6fdbd8SKent Overstreet 21651c6fdbd8SKent Overstreet ret = bio_iov_iter_get_pages(bio, &dio->iter); 21661c6fdbd8SKent Overstreet 2167eb8e6e9cSKent Overstreet dropped_locks = fdm_dropped_locks(); 2168eb8e6e9cSKent Overstreet 21691c6fdbd8SKent Overstreet current->faults_disabled_mapping = NULL; 21701c6fdbd8SKent Overstreet 2171eb8e6e9cSKent Overstreet /* 2172eb8e6e9cSKent Overstreet * If the fault handler returned an error but also signalled 2173eb8e6e9cSKent Overstreet * that it dropped & retook ei_pagecache_lock, we just need to 2174eb8e6e9cSKent Overstreet * re-shoot down the page cache and retry: 2175eb8e6e9cSKent Overstreet */ 2176eb8e6e9cSKent Overstreet if (dropped_locks && ret) 2177eb8e6e9cSKent Overstreet ret = 0; 2178eb8e6e9cSKent Overstreet 21791c6fdbd8SKent Overstreet if (unlikely(ret < 0)) 21801c6fdbd8SKent Overstreet goto err; 21811c6fdbd8SKent Overstreet 2182eb8e6e9cSKent Overstreet if (unlikely(dropped_locks)) { 2183eb8e6e9cSKent Overstreet ret = write_invalidate_inode_pages_range(mapping, 2184eb8e6e9cSKent Overstreet req->ki_pos, 2185eb8e6e9cSKent Overstreet req->ki_pos + iter_count - 1); 2186eb8e6e9cSKent Overstreet if (unlikely(ret)) 2187eb8e6e9cSKent Overstreet goto err; 2188eb8e6e9cSKent Overstreet 2189eb8e6e9cSKent Overstreet if (!bio->bi_iter.bi_size) 2190eb8e6e9cSKent Overstreet continue; 2191eb8e6e9cSKent Overstreet } 2192eb8e6e9cSKent Overstreet 21930a426c32SKent Overstreet unaligned = bio->bi_iter.bi_size & (block_bytes(c) - 1); 21940a426c32SKent Overstreet bio->bi_iter.bi_size -= unaligned; 21950a426c32SKent Overstreet iov_iter_revert(&dio->iter, unaligned); 21960a426c32SKent Overstreet 21970a426c32SKent Overstreet if (!bio->bi_iter.bi_size) { 21980a426c32SKent Overstreet /* 21990a426c32SKent Overstreet * bio_iov_iter_get_pages was only able to get < 22000a426c32SKent Overstreet * blocksize worth of pages: 22010a426c32SKent Overstreet */ 22020a426c32SKent Overstreet ret = -EFAULT; 22030a426c32SKent Overstreet goto err; 22040a426c32SKent Overstreet } 22050a426c32SKent Overstreet 2206042a1f26SKent Overstreet bch2_write_op_init(&dio->op, c, io_opts(c, &inode->ei_inode)); 2207*182c7bbfSKent Overstreet dio->op.end_io = sync 2208*182c7bbfSKent Overstreet ? NULL 2209*182c7bbfSKent Overstreet : bch2_dio_write_loop_async; 2210042a1f26SKent Overstreet dio->op.target = dio->op.opts.foreground_target; 2211042a1f26SKent Overstreet dio->op.write_point = writepoint_hashed((unsigned long) current); 2212042a1f26SKent Overstreet dio->op.nr_replicas = dio->op.opts.data_replicas; 22138c6d298aSKent Overstreet dio->op.subvol = inode->ei_subvol; 2214042a1f26SKent Overstreet dio->op.pos = POS(inode->v.i_ino, (u64) req->ki_pos >> 9); 2215042a1f26SKent Overstreet 22161df3e199SKent Overstreet if (sync) 22171df3e199SKent Overstreet dio->op.flags |= BCH_WRITE_SYNC; 2218042a1f26SKent Overstreet if ((req->ki_flags & IOCB_DSYNC) && 2219042a1f26SKent Overstreet !c->opts.journal_flush_disabled) 2220042a1f26SKent Overstreet dio->op.flags |= BCH_WRITE_FLUSH; 2221a6336910SKent Overstreet dio->op.flags |= BCH_WRITE_CHECK_ENOSPC; 2222042a1f26SKent Overstreet 2223042a1f26SKent Overstreet ret = bch2_disk_reservation_get(c, &dio->op.res, bio_sectors(bio), 2224042a1f26SKent Overstreet dio->op.opts.data_replicas, 0); 2225042a1f26SKent Overstreet if (unlikely(ret) && 2226*182c7bbfSKent Overstreet !bch2_dio_write_check_allocated(dio)) 2227042a1f26SKent Overstreet goto err; 22281c6fdbd8SKent Overstreet 22291c6fdbd8SKent Overstreet task_io_account_write(bio->bi_iter.bi_size); 22301c6fdbd8SKent Overstreet 2231*182c7bbfSKent Overstreet if (unlikely(dio->iter.count) && 2232*182c7bbfSKent Overstreet !dio->sync && 2233*182c7bbfSKent Overstreet !dio->loop && 2234*182c7bbfSKent Overstreet bch2_dio_write_copy_iov(dio)) 2235286d8ad0SKent Overstreet dio->sync = sync = true; 2236*182c7bbfSKent Overstreet 22371c6fdbd8SKent Overstreet dio->loop = true; 2238f8f30863SKent Overstreet closure_call(&dio->op.cl, bch2_write, NULL, NULL); 22391c6fdbd8SKent Overstreet 2240*182c7bbfSKent Overstreet if (!sync) 22411c6fdbd8SKent Overstreet return -EIOCBQUEUED; 22429a3df993SKent Overstreet 2243*182c7bbfSKent Overstreet bch2_dio_write_end(dio); 22449a3df993SKent Overstreet 2245*182c7bbfSKent Overstreet if (likely(!dio->iter.count) || dio->op.error) 22461c6fdbd8SKent Overstreet break; 2247f8f30863SKent Overstreet 22481c6fdbd8SKent Overstreet bio_reset(bio, NULL, REQ_OP_WRITE); 22491c6fdbd8SKent Overstreet } 2250*182c7bbfSKent Overstreet out: 2251*182c7bbfSKent Overstreet return bch2_dio_write_done(dio); 22521c6fdbd8SKent Overstreet err: 2253*182c7bbfSKent Overstreet dio->op.error = ret; 22541c6fdbd8SKent Overstreet 22555468f119SKent Overstreet bio_release_pages(bio, false); 2256*182c7bbfSKent Overstreet goto out; 22571c6fdbd8SKent Overstreet } 22581c6fdbd8SKent Overstreet 2259f8f30863SKent Overstreet static void bch2_dio_write_loop_async(struct bch_write_op *op) 22601c6fdbd8SKent Overstreet { 2261f8f30863SKent Overstreet struct dio_write *dio = container_of(op, struct dio_write, op); 2262*182c7bbfSKent Overstreet struct mm_struct *mm = dio->mm; 22631c6fdbd8SKent Overstreet 2264*182c7bbfSKent Overstreet bch2_dio_write_end(dio); 2265*182c7bbfSKent Overstreet 2266*182c7bbfSKent Overstreet if (likely(!dio->iter.count) || dio->op.error) { 2267*182c7bbfSKent Overstreet bch2_dio_write_done(dio); 2268*182c7bbfSKent Overstreet return; 2269*182c7bbfSKent Overstreet } 2270*182c7bbfSKent Overstreet 2271*182c7bbfSKent Overstreet bio_reset(&dio->op.wbio.bio, NULL, REQ_OP_WRITE); 2272*182c7bbfSKent Overstreet 2273*182c7bbfSKent Overstreet if (mm) 2274*182c7bbfSKent Overstreet kthread_use_mm(mm); 22751c6fdbd8SKent Overstreet bch2_dio_write_loop(dio); 2276*182c7bbfSKent Overstreet if (mm) 2277*182c7bbfSKent Overstreet kthread_unuse_mm(mm); 22781c6fdbd8SKent Overstreet } 22791c6fdbd8SKent Overstreet 22801c6fdbd8SKent Overstreet static noinline 22811c6fdbd8SKent Overstreet ssize_t bch2_direct_write(struct kiocb *req, struct iov_iter *iter) 22821c6fdbd8SKent Overstreet { 22831c6fdbd8SKent Overstreet struct file *file = req->ki_filp; 228454847d25SKent Overstreet struct address_space *mapping = file->f_mapping; 22851c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 22861c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 22871c6fdbd8SKent Overstreet struct dio_write *dio; 22881c6fdbd8SKent Overstreet struct bio *bio; 22897edcfbfeSKent Overstreet bool locked = true, extending; 22901c6fdbd8SKent Overstreet ssize_t ret; 22911c6fdbd8SKent Overstreet 22927edcfbfeSKent Overstreet prefetch(&c->opts); 22937edcfbfeSKent Overstreet prefetch((void *) &c->opts + 64); 22947edcfbfeSKent Overstreet prefetch(&inode->ei_inode); 22957edcfbfeSKent Overstreet prefetch((void *) &inode->ei_inode + 64); 22961c6fdbd8SKent Overstreet 22977edcfbfeSKent Overstreet inode_lock(&inode->v); 22987edcfbfeSKent Overstreet 22997edcfbfeSKent Overstreet ret = generic_write_checks(req, iter); 23007edcfbfeSKent Overstreet if (unlikely(ret <= 0)) 23017edcfbfeSKent Overstreet goto err; 23027edcfbfeSKent Overstreet 23037edcfbfeSKent Overstreet ret = file_remove_privs(file); 23047edcfbfeSKent Overstreet if (unlikely(ret)) 23057edcfbfeSKent Overstreet goto err; 23067edcfbfeSKent Overstreet 23077edcfbfeSKent Overstreet ret = file_update_time(file); 23087edcfbfeSKent Overstreet if (unlikely(ret)) 23097edcfbfeSKent Overstreet goto err; 23101c6fdbd8SKent Overstreet 2311919dbbd1SKent Overstreet if (unlikely((req->ki_pos|iter->count) & (block_bytes(c) - 1))) 23127edcfbfeSKent Overstreet goto err; 23137edcfbfeSKent Overstreet 23147edcfbfeSKent Overstreet inode_dio_begin(&inode->v); 23157edcfbfeSKent Overstreet bch2_pagecache_block_get(&inode->ei_pagecache_lock); 23167edcfbfeSKent Overstreet 23177edcfbfeSKent Overstreet extending = req->ki_pos + iter->count > inode->v.i_size; 23187edcfbfeSKent Overstreet if (!extending) { 23197edcfbfeSKent Overstreet inode_unlock(&inode->v); 23207edcfbfeSKent Overstreet locked = false; 23217edcfbfeSKent Overstreet } 23221c6fdbd8SKent Overstreet 23231c6fdbd8SKent Overstreet bio = bio_alloc_bioset(NULL, 23244d126dc8SKent Overstreet bio_iov_vecs_to_alloc(iter, BIO_MAX_VECS), 23251c6fdbd8SKent Overstreet REQ_OP_WRITE, 23261c6fdbd8SKent Overstreet GFP_KERNEL, 23271c6fdbd8SKent Overstreet &c->dio_write_bioset); 23289a3df993SKent Overstreet dio = container_of(bio, struct dio_write, op.wbio.bio); 23291c6fdbd8SKent Overstreet dio->req = req; 2330*182c7bbfSKent Overstreet dio->mapping = mapping; 2331*182c7bbfSKent Overstreet dio->inode = inode; 2332ed484030SKent Overstreet dio->mm = current->mm; 23331c6fdbd8SKent Overstreet dio->loop = false; 23347edcfbfeSKent Overstreet dio->sync = is_sync_kiocb(req) || extending; 23351c6fdbd8SKent Overstreet dio->free_iov = false; 23361c6fdbd8SKent Overstreet dio->quota_res.sectors = 0; 2337042a1f26SKent Overstreet dio->written = 0; 23381c6fdbd8SKent Overstreet dio->iter = *iter; 2339*182c7bbfSKent Overstreet dio->op.c = c; 23409a3df993SKent Overstreet 23411c6fdbd8SKent Overstreet ret = bch2_quota_reservation_add(c, inode, &dio->quota_res, 23421c6fdbd8SKent Overstreet iter->count >> 9, true); 23431c6fdbd8SKent Overstreet if (unlikely(ret)) 23447edcfbfeSKent Overstreet goto err_put_bio; 23451c6fdbd8SKent Overstreet 2346a023127aSKent Overstreet if (unlikely(mapping->nrpages)) { 234754847d25SKent Overstreet ret = write_invalidate_inode_pages_range(mapping, 234854847d25SKent Overstreet req->ki_pos, 234954847d25SKent Overstreet req->ki_pos + iter->count - 1); 235054847d25SKent Overstreet if (unlikely(ret)) 235154847d25SKent Overstreet goto err_put_bio; 2352a023127aSKent Overstreet } 235354847d25SKent Overstreet 23547edcfbfeSKent Overstreet ret = bch2_dio_write_loop(dio); 23551c6fdbd8SKent Overstreet err: 23567edcfbfeSKent Overstreet if (locked) 23577edcfbfeSKent Overstreet inode_unlock(&inode->v); 23587edcfbfeSKent Overstreet return ret; 23597edcfbfeSKent Overstreet err_put_bio: 23607edcfbfeSKent Overstreet bch2_pagecache_block_put(&inode->ei_pagecache_lock); 23611c6fdbd8SKent Overstreet bch2_quota_reservation_put(c, inode, &dio->quota_res); 23621c6fdbd8SKent Overstreet bio_put(bio); 23637edcfbfeSKent Overstreet inode_dio_end(&inode->v); 23647edcfbfeSKent Overstreet goto err; 23651c6fdbd8SKent Overstreet } 23661c6fdbd8SKent Overstreet 23677edcfbfeSKent Overstreet ssize_t bch2_write_iter(struct kiocb *iocb, struct iov_iter *from) 23681c6fdbd8SKent Overstreet { 23691c6fdbd8SKent Overstreet struct file *file = iocb->ki_filp; 23707edcfbfeSKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 23711c6fdbd8SKent Overstreet ssize_t ret; 23721c6fdbd8SKent Overstreet 23735c1ef830SKent Overstreet if (iocb->ki_flags & IOCB_DIRECT) { 23745c1ef830SKent Overstreet ret = bch2_direct_write(iocb, from); 23755c1ef830SKent Overstreet goto out; 23765c1ef830SKent Overstreet } 23771c6fdbd8SKent Overstreet 23787edcfbfeSKent Overstreet inode_lock(&inode->v); 23797edcfbfeSKent Overstreet 23807edcfbfeSKent Overstreet ret = generic_write_checks(iocb, from); 23817edcfbfeSKent Overstreet if (ret <= 0) 23827edcfbfeSKent Overstreet goto unlock; 23837edcfbfeSKent Overstreet 23841c6fdbd8SKent Overstreet ret = file_remove_privs(file); 23851c6fdbd8SKent Overstreet if (ret) 23867edcfbfeSKent Overstreet goto unlock; 23871c6fdbd8SKent Overstreet 23881c6fdbd8SKent Overstreet ret = file_update_time(file); 23891c6fdbd8SKent Overstreet if (ret) 23907edcfbfeSKent Overstreet goto unlock; 23911c6fdbd8SKent Overstreet 23927edcfbfeSKent Overstreet ret = bch2_buffered_write(iocb, from); 23931c6fdbd8SKent Overstreet if (likely(ret > 0)) 23941c6fdbd8SKent Overstreet iocb->ki_pos += ret; 23957edcfbfeSKent Overstreet unlock: 23961c6fdbd8SKent Overstreet inode_unlock(&inode->v); 23971c6fdbd8SKent Overstreet 23987edcfbfeSKent Overstreet if (ret > 0) 23991c6fdbd8SKent Overstreet ret = generic_write_sync(iocb, ret); 24005c1ef830SKent Overstreet out: 24015c1ef830SKent Overstreet return bch2_err_class(ret); 24021c6fdbd8SKent Overstreet } 24031c6fdbd8SKent Overstreet 24041c6fdbd8SKent Overstreet /* fsync: */ 24051c6fdbd8SKent Overstreet 240668a2054dSKent Overstreet /* 240768a2054dSKent Overstreet * inode->ei_inode.bi_journal_seq won't be up to date since it's set in an 240868a2054dSKent Overstreet * insert trigger: look up the btree inode instead 240968a2054dSKent Overstreet */ 241068a2054dSKent Overstreet static int bch2_flush_inode(struct bch_fs *c, subvol_inum inum) 241168a2054dSKent Overstreet { 241268a2054dSKent Overstreet struct bch_inode_unpacked inode; 241368a2054dSKent Overstreet int ret; 241468a2054dSKent Overstreet 241568a2054dSKent Overstreet if (c->opts.journal_flush_disabled) 241668a2054dSKent Overstreet return 0; 241768a2054dSKent Overstreet 241868a2054dSKent Overstreet ret = bch2_inode_find_by_inum(c, inum, &inode); 241968a2054dSKent Overstreet if (ret) 242068a2054dSKent Overstreet return ret; 242168a2054dSKent Overstreet 242268a2054dSKent Overstreet return bch2_journal_flush_seq(&c->journal, inode.bi_journal_seq); 242368a2054dSKent Overstreet } 242468a2054dSKent Overstreet 24251c6fdbd8SKent Overstreet int bch2_fsync(struct file *file, loff_t start, loff_t end, int datasync) 24261c6fdbd8SKent Overstreet { 24271c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 24281c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 242968a2054dSKent Overstreet int ret, ret2, ret3; 24301c6fdbd8SKent Overstreet 24311c6fdbd8SKent Overstreet ret = file_write_and_wait_range(file, start, end); 243268a2054dSKent Overstreet ret2 = sync_inode_metadata(&inode->v, 1); 243368a2054dSKent Overstreet ret3 = bch2_flush_inode(c, inode_inum(inode)); 24341c6fdbd8SKent Overstreet 24355c1ef830SKent Overstreet return bch2_err_class(ret ?: ret2 ?: ret3); 24361c6fdbd8SKent Overstreet } 24371c6fdbd8SKent Overstreet 24381c6fdbd8SKent Overstreet /* truncate: */ 24391c6fdbd8SKent Overstreet 24406fed42bbSKent Overstreet static inline int range_has_data(struct bch_fs *c, u32 subvol, 24411c6fdbd8SKent Overstreet struct bpos start, 24421c6fdbd8SKent Overstreet struct bpos end) 24431c6fdbd8SKent Overstreet { 2444424eb881SKent Overstreet struct btree_trans trans; 244567e0dd8fSKent Overstreet struct btree_iter iter; 24461c6fdbd8SKent Overstreet struct bkey_s_c k; 24471c6fdbd8SKent Overstreet int ret = 0; 24481c6fdbd8SKent Overstreet 244920bceecbSKent Overstreet bch2_trans_init(&trans, c, 0, 0); 24506fed42bbSKent Overstreet retry: 24516fed42bbSKent Overstreet bch2_trans_begin(&trans); 24526fed42bbSKent Overstreet 24536fed42bbSKent Overstreet ret = bch2_subvolume_get_snapshot(&trans, subvol, &start.snapshot); 24546fed42bbSKent Overstreet if (ret) 24556fed42bbSKent Overstreet goto err; 2456424eb881SKent Overstreet 2457e5fa91d7SKent Overstreet for_each_btree_key_norestart(&trans, iter, BTREE_ID_extents, start, 0, k, ret) { 24581c6fdbd8SKent Overstreet if (bkey_cmp(bkey_start_pos(k.k), end) >= 0) 24591c6fdbd8SKent Overstreet break; 24601c6fdbd8SKent Overstreet 24611c6fdbd8SKent Overstreet if (bkey_extent_is_data(k.k)) { 24621c6fdbd8SKent Overstreet ret = 1; 24631c6fdbd8SKent Overstreet break; 24641c6fdbd8SKent Overstreet } 24651c6fdbd8SKent Overstreet } 24666fed42bbSKent Overstreet start = iter.pos; 246767e0dd8fSKent Overstreet bch2_trans_iter_exit(&trans, &iter); 24686fed42bbSKent Overstreet err: 2469549d173cSKent Overstreet if (bch2_err_matches(ret, BCH_ERR_transaction_restart)) 24706fed42bbSKent Overstreet goto retry; 24711c6fdbd8SKent Overstreet 24729a796fdbSKent Overstreet bch2_trans_exit(&trans); 24739a796fdbSKent Overstreet return ret; 24741c6fdbd8SKent Overstreet } 24751c6fdbd8SKent Overstreet 24761c6fdbd8SKent Overstreet static int __bch2_truncate_page(struct bch_inode_info *inode, 24771c6fdbd8SKent Overstreet pgoff_t index, loff_t start, loff_t end) 24781c6fdbd8SKent Overstreet { 24791c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 24801c6fdbd8SKent Overstreet struct address_space *mapping = inode->v.i_mapping; 2481a99b1cafSKent Overstreet struct bch_page_state *s; 24821c6fdbd8SKent Overstreet unsigned start_offset = start & (PAGE_SIZE - 1); 24831c6fdbd8SKent Overstreet unsigned end_offset = ((end - 1) & (PAGE_SIZE - 1)) + 1; 2484a99b1cafSKent Overstreet unsigned i; 24851c6fdbd8SKent Overstreet struct page *page; 2486b19d307dSKent Overstreet s64 i_sectors_delta = 0; 24871c6fdbd8SKent Overstreet int ret = 0; 24881c6fdbd8SKent Overstreet 24891c6fdbd8SKent Overstreet /* Page boundary? Nothing to do */ 24901c6fdbd8SKent Overstreet if (!((index == start >> PAGE_SHIFT && start_offset) || 24911c6fdbd8SKent Overstreet (index == end >> PAGE_SHIFT && end_offset != PAGE_SIZE))) 24921c6fdbd8SKent Overstreet return 0; 24931c6fdbd8SKent Overstreet 24941c6fdbd8SKent Overstreet /* Above i_size? */ 24951c6fdbd8SKent Overstreet if (index << PAGE_SHIFT >= inode->v.i_size) 24961c6fdbd8SKent Overstreet return 0; 24971c6fdbd8SKent Overstreet 24981c6fdbd8SKent Overstreet page = find_lock_page(mapping, index); 24991c6fdbd8SKent Overstreet if (!page) { 25001c6fdbd8SKent Overstreet /* 25011c6fdbd8SKent Overstreet * XXX: we're doing two index lookups when we end up reading the 25021c6fdbd8SKent Overstreet * page 25031c6fdbd8SKent Overstreet */ 25046fed42bbSKent Overstreet ret = range_has_data(c, inode->ei_subvol, 25057279c1a2SKent Overstreet POS(inode->v.i_ino, index << PAGE_SECTORS_SHIFT), 25067279c1a2SKent Overstreet POS(inode->v.i_ino, (index + 1) << PAGE_SECTORS_SHIFT)); 25071c6fdbd8SKent Overstreet if (ret <= 0) 25081c6fdbd8SKent Overstreet return ret; 25091c6fdbd8SKent Overstreet 25101c6fdbd8SKent Overstreet page = find_or_create_page(mapping, index, GFP_KERNEL); 25111c6fdbd8SKent Overstreet if (unlikely(!page)) { 25121c6fdbd8SKent Overstreet ret = -ENOMEM; 25131c6fdbd8SKent Overstreet goto out; 25141c6fdbd8SKent Overstreet } 25151c6fdbd8SKent Overstreet } 25161c6fdbd8SKent Overstreet 2517a99b1cafSKent Overstreet s = bch2_page_state_create(page, 0); 2518a99b1cafSKent Overstreet if (!s) { 2519a99b1cafSKent Overstreet ret = -ENOMEM; 2520a99b1cafSKent Overstreet goto unlock; 2521a99b1cafSKent Overstreet } 2522a99b1cafSKent Overstreet 25231c6fdbd8SKent Overstreet if (!PageUptodate(page)) { 25241c6fdbd8SKent Overstreet ret = bch2_read_single_page(page, mapping); 25251c6fdbd8SKent Overstreet if (ret) 25261c6fdbd8SKent Overstreet goto unlock; 25271c6fdbd8SKent Overstreet } 25281c6fdbd8SKent Overstreet 2529a99b1cafSKent Overstreet if (index != start >> PAGE_SHIFT) 2530a99b1cafSKent Overstreet start_offset = 0; 2531a99b1cafSKent Overstreet if (index != end >> PAGE_SHIFT) 2532a99b1cafSKent Overstreet end_offset = PAGE_SIZE; 2533a99b1cafSKent Overstreet 2534a99b1cafSKent Overstreet for (i = round_up(start_offset, block_bytes(c)) >> 9; 2535a99b1cafSKent Overstreet i < round_down(end_offset, block_bytes(c)) >> 9; 2536a99b1cafSKent Overstreet i++) { 2537a99b1cafSKent Overstreet s->s[i].nr_replicas = 0; 2538b19d307dSKent Overstreet if (s->s[i].state == SECTOR_DIRTY) 2539b19d307dSKent Overstreet i_sectors_delta--; 2540a99b1cafSKent Overstreet s->s[i].state = SECTOR_UNALLOCATED; 2541a99b1cafSKent Overstreet } 2542a99b1cafSKent Overstreet 2543b19d307dSKent Overstreet i_sectors_acct(c, inode, NULL, i_sectors_delta); 2544b19d307dSKent Overstreet 254574163da7SKent Overstreet /* 254674163da7SKent Overstreet * Caller needs to know whether this page will be written out by 254774163da7SKent Overstreet * writeback - doing an i_size update if necessary - or whether it will 254874163da7SKent Overstreet * be responsible for the i_size update: 254974163da7SKent Overstreet */ 255074163da7SKent Overstreet ret = s->s[(min_t(u64, inode->v.i_size - (index << PAGE_SHIFT), 255174163da7SKent Overstreet PAGE_SIZE) - 1) >> 9].state >= SECTOR_DIRTY; 255274163da7SKent Overstreet 2553a99b1cafSKent Overstreet zero_user_segment(page, start_offset, end_offset); 2554a99b1cafSKent Overstreet 25551c6fdbd8SKent Overstreet /* 25561c6fdbd8SKent Overstreet * Bit of a hack - we don't want truncate to fail due to -ENOSPC. 25571c6fdbd8SKent Overstreet * 25581c6fdbd8SKent Overstreet * XXX: because we aren't currently tracking whether the page has actual 25591c6fdbd8SKent Overstreet * data in it (vs. just 0s, or only partially written) this wrong. ick. 25601c6fdbd8SKent Overstreet */ 256174163da7SKent Overstreet BUG_ON(bch2_get_page_disk_reservation(c, inode, page, false)); 25621c6fdbd8SKent Overstreet 25639ba2eb25SKent Overstreet /* 25649ba2eb25SKent Overstreet * This removes any writeable userspace mappings; we need to force 25659ba2eb25SKent Overstreet * .page_mkwrite to be called again before any mmapped writes, to 25669ba2eb25SKent Overstreet * redirty the full page: 25679ba2eb25SKent Overstreet */ 25689ba2eb25SKent Overstreet page_mkclean(page); 2569d1542e03SKent Overstreet filemap_dirty_folio(mapping, page_folio(page)); 25701c6fdbd8SKent Overstreet unlock: 25711c6fdbd8SKent Overstreet unlock_page(page); 25721c6fdbd8SKent Overstreet put_page(page); 25731c6fdbd8SKent Overstreet out: 25741c6fdbd8SKent Overstreet return ret; 25751c6fdbd8SKent Overstreet } 25761c6fdbd8SKent Overstreet 25771c6fdbd8SKent Overstreet static int bch2_truncate_page(struct bch_inode_info *inode, loff_t from) 25781c6fdbd8SKent Overstreet { 25791c6fdbd8SKent Overstreet return __bch2_truncate_page(inode, from >> PAGE_SHIFT, 2580a99b1cafSKent Overstreet from, round_up(from, PAGE_SIZE)); 25811c6fdbd8SKent Overstreet } 25821c6fdbd8SKent Overstreet 258374163da7SKent Overstreet static int bch2_truncate_pages(struct bch_inode_info *inode, 258474163da7SKent Overstreet loff_t start, loff_t end) 258574163da7SKent Overstreet { 258674163da7SKent Overstreet int ret = __bch2_truncate_page(inode, start >> PAGE_SHIFT, 258774163da7SKent Overstreet start, end); 258874163da7SKent Overstreet 258974163da7SKent Overstreet if (ret >= 0 && 259074163da7SKent Overstreet start >> PAGE_SHIFT != end >> PAGE_SHIFT) 259174163da7SKent Overstreet ret = __bch2_truncate_page(inode, 259274163da7SKent Overstreet end >> PAGE_SHIFT, 259374163da7SKent Overstreet start, end); 259474163da7SKent Overstreet return ret; 259574163da7SKent Overstreet } 259674163da7SKent Overstreet 259768a507a2SKent Overstreet static int bch2_extend(struct mnt_idmap *idmap, 259868a507a2SKent Overstreet struct bch_inode_info *inode, 2599e0541a93SKent Overstreet struct bch_inode_unpacked *inode_u, 2600e0541a93SKent Overstreet struct iattr *iattr) 26011c6fdbd8SKent Overstreet { 26021c6fdbd8SKent Overstreet struct address_space *mapping = inode->v.i_mapping; 26031c6fdbd8SKent Overstreet int ret; 26041c6fdbd8SKent Overstreet 2605e0541a93SKent Overstreet /* 2606e0541a93SKent Overstreet * sync appends: 26072925fc49SKent Overstreet * 26082925fc49SKent Overstreet * this has to be done _before_ extending i_size: 2609e0541a93SKent Overstreet */ 2610e0541a93SKent Overstreet ret = filemap_write_and_wait_range(mapping, inode_u->bi_size, S64_MAX); 26111c6fdbd8SKent Overstreet if (ret) 26121c6fdbd8SKent Overstreet return ret; 26131c6fdbd8SKent Overstreet 26141c6fdbd8SKent Overstreet truncate_setsize(&inode->v, iattr->ia_size); 26151c6fdbd8SKent Overstreet 261668a507a2SKent Overstreet return bch2_setattr_nonsize(idmap, inode, iattr); 26171c6fdbd8SKent Overstreet } 26181c6fdbd8SKent Overstreet 261954e2264eSKent Overstreet static int bch2_truncate_finish_fn(struct bch_inode_info *inode, 262054e2264eSKent Overstreet struct bch_inode_unpacked *bi, 262154e2264eSKent Overstreet void *p) 262254e2264eSKent Overstreet { 262354e2264eSKent Overstreet bi->bi_flags &= ~BCH_INODE_I_SIZE_DIRTY; 262454e2264eSKent Overstreet return 0; 262554e2264eSKent Overstreet } 262654e2264eSKent Overstreet 262754e2264eSKent Overstreet static int bch2_truncate_start_fn(struct bch_inode_info *inode, 262854e2264eSKent Overstreet struct bch_inode_unpacked *bi, void *p) 262954e2264eSKent Overstreet { 263054e2264eSKent Overstreet u64 *new_i_size = p; 263154e2264eSKent Overstreet 263254e2264eSKent Overstreet bi->bi_flags |= BCH_INODE_I_SIZE_DIRTY; 263354e2264eSKent Overstreet bi->bi_size = *new_i_size; 263454e2264eSKent Overstreet return 0; 263554e2264eSKent Overstreet } 263654e2264eSKent Overstreet 263768a507a2SKent Overstreet int bch2_truncate(struct mnt_idmap *idmap, 263868a507a2SKent Overstreet struct bch_inode_info *inode, struct iattr *iattr) 26391c6fdbd8SKent Overstreet { 26401c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 26411c6fdbd8SKent Overstreet struct address_space *mapping = inode->v.i_mapping; 2642e0541a93SKent Overstreet struct bch_inode_unpacked inode_u; 264354e2264eSKent Overstreet u64 new_i_size = iattr->ia_size; 26442e87eae1SKent Overstreet s64 i_sectors_delta = 0; 26451c6fdbd8SKent Overstreet int ret = 0; 26461c6fdbd8SKent Overstreet 264768a507a2SKent Overstreet /* 264878d66ab1SDan Robertson * If the truncate call with change the size of the file, the 264978d66ab1SDan Robertson * cmtimes should be updated. If the size will not change, we 265078d66ab1SDan Robertson * do not need to update the cmtimes. 265168a507a2SKent Overstreet */ 265278d66ab1SDan Robertson if (iattr->ia_size != inode->v.i_size) { 265368a507a2SKent Overstreet if (!(iattr->ia_valid & ATTR_MTIME)) 265468a507a2SKent Overstreet ktime_get_coarse_real_ts64(&iattr->ia_mtime); 265568a507a2SKent Overstreet if (!(iattr->ia_valid & ATTR_CTIME)) 265668a507a2SKent Overstreet ktime_get_coarse_real_ts64(&iattr->ia_ctime); 265768a507a2SKent Overstreet iattr->ia_valid |= ATTR_MTIME|ATTR_CTIME; 265878d66ab1SDan Robertson } 265968a507a2SKent Overstreet 26601c6fdbd8SKent Overstreet inode_dio_wait(&inode->v); 26611c6fdbd8SKent Overstreet bch2_pagecache_block_get(&inode->ei_pagecache_lock); 26621c6fdbd8SKent Overstreet 26636fed42bbSKent Overstreet ret = bch2_inode_find_by_inum(c, inode_inum(inode), &inode_u); 2664e0541a93SKent Overstreet if (ret) 2665e0541a93SKent Overstreet goto err; 26661c6fdbd8SKent Overstreet 2667c45d473dSKent Overstreet /* 2668c45d473dSKent Overstreet * check this before next assertion; on filesystem error our normal 2669c45d473dSKent Overstreet * invariants are a bit broken (truncate has to truncate the page cache 2670c45d473dSKent Overstreet * before the inode). 2671c45d473dSKent Overstreet */ 2672c45d473dSKent Overstreet ret = bch2_journal_error(&c->journal); 2673c45d473dSKent Overstreet if (ret) 2674c45d473dSKent Overstreet goto err; 2675c45d473dSKent Overstreet 267633c74e41SKent Overstreet WARN_ON(!test_bit(EI_INODE_ERROR, &inode->ei_flags) && 267733c74e41SKent Overstreet inode->v.i_size < inode_u.bi_size); 2678e0541a93SKent Overstreet 2679e0541a93SKent Overstreet if (iattr->ia_size > inode->v.i_size) { 268068a507a2SKent Overstreet ret = bch2_extend(idmap, inode, &inode_u, iattr); 268154e2264eSKent Overstreet goto err; 26821c6fdbd8SKent Overstreet } 26831c6fdbd8SKent Overstreet 268468a507a2SKent Overstreet iattr->ia_valid &= ~ATTR_SIZE; 268568a507a2SKent Overstreet 26861c6fdbd8SKent Overstreet ret = bch2_truncate_page(inode, iattr->ia_size); 268774163da7SKent Overstreet if (unlikely(ret < 0)) 268854e2264eSKent Overstreet goto err; 26891c6fdbd8SKent Overstreet 26906cc3535dSKent Overstreet /* 26916cc3535dSKent Overstreet * When extending, we're going to write the new i_size to disk 26926cc3535dSKent Overstreet * immediately so we need to flush anything above the current on disk 26936cc3535dSKent Overstreet * i_size first: 26946cc3535dSKent Overstreet * 26956cc3535dSKent Overstreet * Also, when extending we need to flush the page that i_size currently 26966cc3535dSKent Overstreet * straddles - if it's mapped to userspace, we need to ensure that 26976cc3535dSKent Overstreet * userspace has to redirty it and call .mkwrite -> set_page_dirty 26986cc3535dSKent Overstreet * again to allocate the part of the page that was extended. 26996cc3535dSKent Overstreet */ 2700e0541a93SKent Overstreet if (iattr->ia_size > inode_u.bi_size) 27011c6fdbd8SKent Overstreet ret = filemap_write_and_wait_range(mapping, 2702e0541a93SKent Overstreet inode_u.bi_size, 27031c6fdbd8SKent Overstreet iattr->ia_size - 1); 27041c6fdbd8SKent Overstreet else if (iattr->ia_size & (PAGE_SIZE - 1)) 27051c6fdbd8SKent Overstreet ret = filemap_write_and_wait_range(mapping, 27061c6fdbd8SKent Overstreet round_down(iattr->ia_size, PAGE_SIZE), 27071c6fdbd8SKent Overstreet iattr->ia_size - 1); 27081c6fdbd8SKent Overstreet if (ret) 270954e2264eSKent Overstreet goto err; 27101c6fdbd8SKent Overstreet 271154e2264eSKent Overstreet mutex_lock(&inode->ei_update_lock); 271254e2264eSKent Overstreet ret = bch2_write_inode(c, inode, bch2_truncate_start_fn, 271354e2264eSKent Overstreet &new_i_size, 0); 271454e2264eSKent Overstreet mutex_unlock(&inode->ei_update_lock); 27151c6fdbd8SKent Overstreet 27161c6fdbd8SKent Overstreet if (unlikely(ret)) 271754e2264eSKent Overstreet goto err; 27181c6fdbd8SKent Overstreet 27191c6fdbd8SKent Overstreet truncate_setsize(&inode->v, iattr->ia_size); 27201c6fdbd8SKent Overstreet 27218c6d298aSKent Overstreet ret = bch2_fpunch(c, inode_inum(inode), 2722a99b1cafSKent Overstreet round_up(iattr->ia_size, block_bytes(c)) >> 9, 272368a2054dSKent Overstreet U64_MAX, &i_sectors_delta); 27242e87eae1SKent Overstreet i_sectors_acct(c, inode, NULL, i_sectors_delta); 27252e87eae1SKent Overstreet 2726b33bf1bcSKent Overstreet bch2_fs_inconsistent_on(!inode->v.i_size && inode->v.i_blocks && 2727b33bf1bcSKent Overstreet !bch2_journal_error(&c->journal), c, 2728b33bf1bcSKent Overstreet "inode %lu truncated to 0 but i_blocks %llu (ondisk %lli)", 2729b33bf1bcSKent Overstreet inode->v.i_ino, (u64) inode->v.i_blocks, 2730b33bf1bcSKent Overstreet inode->ei_inode.bi_sectors); 27311c6fdbd8SKent Overstreet if (unlikely(ret)) 273254e2264eSKent Overstreet goto err; 27331c6fdbd8SKent Overstreet 273454e2264eSKent Overstreet mutex_lock(&inode->ei_update_lock); 273568a507a2SKent Overstreet ret = bch2_write_inode(c, inode, bch2_truncate_finish_fn, NULL, 0); 273654e2264eSKent Overstreet mutex_unlock(&inode->ei_update_lock); 273768a507a2SKent Overstreet 273868a507a2SKent Overstreet ret = bch2_setattr_nonsize(idmap, inode, iattr); 273954e2264eSKent Overstreet err: 27401c6fdbd8SKent Overstreet bch2_pagecache_block_put(&inode->ei_pagecache_lock); 27415c1ef830SKent Overstreet return bch2_err_class(ret); 27421c6fdbd8SKent Overstreet } 27431c6fdbd8SKent Overstreet 27441c6fdbd8SKent Overstreet /* fallocate: */ 27451c6fdbd8SKent Overstreet 2746050197b1SKent Overstreet static int inode_update_times_fn(struct bch_inode_info *inode, 2747050197b1SKent Overstreet struct bch_inode_unpacked *bi, void *p) 2748050197b1SKent Overstreet { 2749050197b1SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 2750050197b1SKent Overstreet 2751050197b1SKent Overstreet bi->bi_mtime = bi->bi_ctime = bch2_current_time(c); 2752050197b1SKent Overstreet return 0; 2753050197b1SKent Overstreet } 2754050197b1SKent Overstreet 27552e87eae1SKent Overstreet static long bchfs_fpunch(struct bch_inode_info *inode, loff_t offset, loff_t len) 27561c6fdbd8SKent Overstreet { 27571c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 275874163da7SKent Overstreet u64 end = offset + len; 275974163da7SKent Overstreet u64 block_start = round_up(offset, block_bytes(c)); 276074163da7SKent Overstreet u64 block_end = round_down(end, block_bytes(c)); 276174163da7SKent Overstreet bool truncated_last_page; 27621c6fdbd8SKent Overstreet int ret = 0; 27631c6fdbd8SKent Overstreet 276474163da7SKent Overstreet ret = bch2_truncate_pages(inode, offset, end); 276574163da7SKent Overstreet if (unlikely(ret < 0)) 27661c6fdbd8SKent Overstreet goto err; 27671c6fdbd8SKent Overstreet 276874163da7SKent Overstreet truncated_last_page = ret; 27691c6fdbd8SKent Overstreet 277074163da7SKent Overstreet truncate_pagecache_range(&inode->v, offset, end - 1); 27711c6fdbd8SKent Overstreet 277274163da7SKent Overstreet if (block_start < block_end) { 27732e87eae1SKent Overstreet s64 i_sectors_delta = 0; 27742e87eae1SKent Overstreet 27758c6d298aSKent Overstreet ret = bch2_fpunch(c, inode_inum(inode), 277674163da7SKent Overstreet block_start >> 9, block_end >> 9, 27772e87eae1SKent Overstreet &i_sectors_delta); 27782e87eae1SKent Overstreet i_sectors_acct(c, inode, NULL, i_sectors_delta); 27792e87eae1SKent Overstreet } 2780050197b1SKent Overstreet 2781050197b1SKent Overstreet mutex_lock(&inode->ei_update_lock); 278274163da7SKent Overstreet if (end >= inode->v.i_size && !truncated_last_page) { 278374163da7SKent Overstreet ret = bch2_write_inode_size(c, inode, inode->v.i_size, 278474163da7SKent Overstreet ATTR_MTIME|ATTR_CTIME); 278574163da7SKent Overstreet } else { 2786050197b1SKent Overstreet ret = bch2_write_inode(c, inode, inode_update_times_fn, NULL, 278774163da7SKent Overstreet ATTR_MTIME|ATTR_CTIME); 278874163da7SKent Overstreet } 2789050197b1SKent Overstreet mutex_unlock(&inode->ei_update_lock); 27901c6fdbd8SKent Overstreet err: 27911c6fdbd8SKent Overstreet return ret; 27921c6fdbd8SKent Overstreet } 27931c6fdbd8SKent Overstreet 27942e87eae1SKent Overstreet static long bchfs_fcollapse_finsert(struct bch_inode_info *inode, 27955f786787SKent Overstreet loff_t offset, loff_t len, 27965f786787SKent Overstreet bool insert) 27971c6fdbd8SKent Overstreet { 27981c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 27991c6fdbd8SKent Overstreet struct address_space *mapping = inode->v.i_mapping; 280007a1006aSKent Overstreet struct bkey_buf copy; 2801d69f41d6SKent Overstreet struct btree_trans trans; 280267e0dd8fSKent Overstreet struct btree_iter src, dst, del; 28035f786787SKent Overstreet loff_t shift, new_size; 28045f786787SKent Overstreet u64 src_start; 280550dc0f69SKent Overstreet int ret = 0; 28061c6fdbd8SKent Overstreet 28071c6fdbd8SKent Overstreet if ((offset | len) & (block_bytes(c) - 1)) 28081c6fdbd8SKent Overstreet return -EINVAL; 28091c6fdbd8SKent Overstreet 28105f786787SKent Overstreet if (insert) { 28115f786787SKent Overstreet if (inode->v.i_sb->s_maxbytes - inode->v.i_size < len) 281274163da7SKent Overstreet return -EFBIG; 28135f786787SKent Overstreet 28145f786787SKent Overstreet if (offset >= inode->v.i_size) 281574163da7SKent Overstreet return -EINVAL; 28165f786787SKent Overstreet 28175f786787SKent Overstreet src_start = U64_MAX; 28185f786787SKent Overstreet shift = len; 28195f786787SKent Overstreet } else { 28201c6fdbd8SKent Overstreet if (offset + len >= inode->v.i_size) 282174163da7SKent Overstreet return -EINVAL; 28221c6fdbd8SKent Overstreet 28235f786787SKent Overstreet src_start = offset + len; 28245f786787SKent Overstreet shift = -len; 28255f786787SKent Overstreet } 28261c6fdbd8SKent Overstreet 28275f786787SKent Overstreet new_size = inode->v.i_size + shift; 28281c6fdbd8SKent Overstreet 28291c6fdbd8SKent Overstreet ret = write_invalidate_inode_pages_range(mapping, offset, LLONG_MAX); 28301c6fdbd8SKent Overstreet if (ret) 283174163da7SKent Overstreet return ret; 28321c6fdbd8SKent Overstreet 28335f786787SKent Overstreet if (insert) { 28345f786787SKent Overstreet i_size_write(&inode->v, new_size); 28355f786787SKent Overstreet mutex_lock(&inode->ei_update_lock); 28365f786787SKent Overstreet ret = bch2_write_inode_size(c, inode, new_size, 28375f786787SKent Overstreet ATTR_MTIME|ATTR_CTIME); 28385f786787SKent Overstreet mutex_unlock(&inode->ei_update_lock); 28395f786787SKent Overstreet } else { 28402e87eae1SKent Overstreet s64 i_sectors_delta = 0; 28412e87eae1SKent Overstreet 28428c6d298aSKent Overstreet ret = bch2_fpunch(c, inode_inum(inode), 28432e87eae1SKent Overstreet offset >> 9, (offset + len) >> 9, 28442e87eae1SKent Overstreet &i_sectors_delta); 28452e87eae1SKent Overstreet i_sectors_acct(c, inode, NULL, i_sectors_delta); 28462e87eae1SKent Overstreet 284763095894SKent Overstreet if (ret) 284874163da7SKent Overstreet return ret; 28495f786787SKent Overstreet } 28508ef231bdSKent Overstreet 285150dc0f69SKent Overstreet bch2_bkey_buf_init(©); 2852f7beb4caSKent Overstreet bch2_trans_init(&trans, c, BTREE_ITER_MAX, 1024); 285367e0dd8fSKent Overstreet bch2_trans_iter_init(&trans, &src, BTREE_ID_extents, 28545f786787SKent Overstreet POS(inode->v.i_ino, src_start >> 9), 285563095894SKent Overstreet BTREE_ITER_INTENT); 285667e0dd8fSKent Overstreet bch2_trans_copy_iter(&dst, &src); 285767e0dd8fSKent Overstreet bch2_trans_copy_iter(&del, &src); 28585f786787SKent Overstreet 2859549d173cSKent Overstreet while (ret == 0 || 2860549d173cSKent Overstreet bch2_err_matches(ret, BCH_ERR_transaction_restart)) { 286163095894SKent Overstreet struct disk_reservation disk_res = 286263095894SKent Overstreet bch2_disk_reservation_init(c, 0); 286363095894SKent Overstreet struct bkey_i delete; 286463095894SKent Overstreet struct bkey_s_c k; 286563095894SKent Overstreet struct bpos next_pos; 28665f786787SKent Overstreet struct bpos move_pos = POS(inode->v.i_ino, offset >> 9); 28675f786787SKent Overstreet struct bpos atomic_end; 28682d594dfbSKent Overstreet unsigned trigger_flags = 0; 28696fed42bbSKent Overstreet u32 snapshot; 28706fed42bbSKent Overstreet 28716fed42bbSKent Overstreet bch2_trans_begin(&trans); 28726fed42bbSKent Overstreet 28736fed42bbSKent Overstreet ret = bch2_subvolume_get_snapshot(&trans, 28746fed42bbSKent Overstreet inode->ei_subvol, &snapshot); 28756fed42bbSKent Overstreet if (ret) 28766fed42bbSKent Overstreet continue; 28776fed42bbSKent Overstreet 28786fed42bbSKent Overstreet bch2_btree_iter_set_snapshot(&src, snapshot); 28796fed42bbSKent Overstreet bch2_btree_iter_set_snapshot(&dst, snapshot); 28806fed42bbSKent Overstreet bch2_btree_iter_set_snapshot(&del, snapshot); 288163095894SKent Overstreet 2882700c25b3SKent Overstreet bch2_trans_begin(&trans); 2883700c25b3SKent Overstreet 28845f786787SKent Overstreet k = insert 288567e0dd8fSKent Overstreet ? bch2_btree_iter_peek_prev(&src) 288667e0dd8fSKent Overstreet : bch2_btree_iter_peek(&src); 288763095894SKent Overstreet if ((ret = bkey_err(k))) 288850dc0f69SKent Overstreet continue; 288963095894SKent Overstreet 289063095894SKent Overstreet if (!k.k || k.k->p.inode != inode->v.i_ino) 289163095894SKent Overstreet break; 289263095894SKent Overstreet 28935f786787SKent Overstreet if (insert && 28945f786787SKent Overstreet bkey_cmp(k.k->p, POS(inode->v.i_ino, offset >> 9)) <= 0) 28955f786787SKent Overstreet break; 28965f786787SKent Overstreet reassemble: 289707a1006aSKent Overstreet bch2_bkey_buf_reassemble(©, c, k); 28985f786787SKent Overstreet 28995f786787SKent Overstreet if (insert && 2900283eda57SKent Overstreet bkey_cmp(bkey_start_pos(k.k), move_pos) < 0) 290135189e09SKent Overstreet bch2_cut_front(move_pos, copy.k); 29025f786787SKent Overstreet 290335189e09SKent Overstreet copy.k->k.p.offset += shift >> 9; 290467e0dd8fSKent Overstreet bch2_btree_iter_set_pos(&dst, bkey_start_pos(©.k->k)); 29051c6fdbd8SKent Overstreet 290667e0dd8fSKent Overstreet ret = bch2_extent_atomic_end(&trans, &dst, copy.k, &atomic_end); 29073c7f3b7aSKent Overstreet if (ret) 290850dc0f69SKent Overstreet continue; 2909e2d9912cSKent Overstreet 291035189e09SKent Overstreet if (bkey_cmp(atomic_end, copy.k->k.p)) { 29115f786787SKent Overstreet if (insert) { 29125f786787SKent Overstreet move_pos = atomic_end; 29135f786787SKent Overstreet move_pos.offset -= shift >> 9; 29145f786787SKent Overstreet goto reassemble; 29155f786787SKent Overstreet } else { 2916085ab693SKent Overstreet bch2_cut_back(atomic_end, copy.k); 29175f786787SKent Overstreet } 29185f786787SKent Overstreet } 29195f786787SKent Overstreet 292063095894SKent Overstreet bkey_init(&delete.k); 2921283eda57SKent Overstreet delete.k.p = copy.k->k.p; 2922283eda57SKent Overstreet delete.k.size = copy.k->k.size; 2923283eda57SKent Overstreet delete.k.p.offset -= shift >> 9; 292467e0dd8fSKent Overstreet bch2_btree_iter_set_pos(&del, bkey_start_pos(&delete.k)); 29251c6fdbd8SKent Overstreet 29265f786787SKent Overstreet next_pos = insert ? bkey_start_pos(&delete.k) : delete.k.p; 292763095894SKent Overstreet 29287c4ca54aSKent Overstreet if (copy.k->k.size != k.k->size) { 292963095894SKent Overstreet /* We might end up splitting compressed extents: */ 293063095894SKent Overstreet unsigned nr_ptrs = 29314de77495SKent Overstreet bch2_bkey_nr_ptrs_allocated(bkey_i_to_s_c(copy.k)); 293263095894SKent Overstreet 293363095894SKent Overstreet ret = bch2_disk_reservation_get(c, &disk_res, 293435189e09SKent Overstreet copy.k->k.size, nr_ptrs, 29351c6fdbd8SKent Overstreet BCH_DISK_RESERVATION_NOFAIL); 29361c6fdbd8SKent Overstreet BUG_ON(ret); 293763095894SKent Overstreet } 29381c6fdbd8SKent Overstreet 293967e0dd8fSKent Overstreet ret = bch2_btree_iter_traverse(&del) ?: 294067e0dd8fSKent Overstreet bch2_trans_update(&trans, &del, &delete, trigger_flags) ?: 294167e0dd8fSKent Overstreet bch2_trans_update(&trans, &dst, copy.k, trigger_flags) ?: 294268a2054dSKent Overstreet bch2_trans_commit(&trans, &disk_res, NULL, 29432d594dfbSKent Overstreet BTREE_INSERT_NOFAIL); 29441c6fdbd8SKent Overstreet bch2_disk_reservation_put(c, &disk_res); 294550dc0f69SKent Overstreet 294663095894SKent Overstreet if (!ret) 294767e0dd8fSKent Overstreet bch2_btree_iter_set_pos(&src, next_pos); 294850dc0f69SKent Overstreet } 294967e0dd8fSKent Overstreet bch2_trans_iter_exit(&trans, &del); 295067e0dd8fSKent Overstreet bch2_trans_iter_exit(&trans, &dst); 295167e0dd8fSKent Overstreet bch2_trans_iter_exit(&trans, &src); 295250dc0f69SKent Overstreet bch2_trans_exit(&trans); 295350dc0f69SKent Overstreet bch2_bkey_buf_exit(©, c); 295463095894SKent Overstreet 29558ef231bdSKent Overstreet if (ret) 295674163da7SKent Overstreet return ret; 29571c6fdbd8SKent Overstreet 295874163da7SKent Overstreet mutex_lock(&inode->ei_update_lock); 29595f786787SKent Overstreet if (!insert) { 29608ef231bdSKent Overstreet i_size_write(&inode->v, new_size); 29618ef231bdSKent Overstreet ret = bch2_write_inode_size(c, inode, new_size, 29628ef231bdSKent Overstreet ATTR_MTIME|ATTR_CTIME); 296374163da7SKent Overstreet } else { 296474163da7SKent Overstreet /* We need an inode update to update bi_journal_seq for fsync: */ 296574163da7SKent Overstreet ret = bch2_write_inode(c, inode, inode_update_times_fn, NULL, 296674163da7SKent Overstreet ATTR_MTIME|ATTR_CTIME); 29675f786787SKent Overstreet } 296874163da7SKent Overstreet mutex_unlock(&inode->ei_update_lock); 29691c6fdbd8SKent Overstreet return ret; 29701c6fdbd8SKent Overstreet } 29711c6fdbd8SKent Overstreet 2972694015c2SKent Overstreet static int __bchfs_fallocate(struct bch_inode_info *inode, int mode, 2973694015c2SKent Overstreet u64 start_sector, u64 end_sector) 29741c6fdbd8SKent Overstreet { 29751c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 2976190fa7afSKent Overstreet struct btree_trans trans; 297767e0dd8fSKent Overstreet struct btree_iter iter; 2978694015c2SKent Overstreet struct bpos end_pos = POS(inode->v.i_ino, end_sector); 29799a3df993SKent Overstreet unsigned replicas = io_opts(c, &inode->ei_inode).data_replicas; 2980694015c2SKent Overstreet int ret = 0; 29811c6fdbd8SKent Overstreet 2982f7beb4caSKent Overstreet bch2_trans_init(&trans, c, BTREE_ITER_MAX, 512); 29831c6fdbd8SKent Overstreet 298467e0dd8fSKent Overstreet bch2_trans_iter_init(&trans, &iter, BTREE_ID_extents, 2985694015c2SKent Overstreet POS(inode->v.i_ino, start_sector), 2986190fa7afSKent Overstreet BTREE_ITER_SLOTS|BTREE_ITER_INTENT); 29871c6fdbd8SKent Overstreet 298867e0dd8fSKent Overstreet while (!ret && bkey_cmp(iter.pos, end_pos) < 0) { 29892e87eae1SKent Overstreet s64 i_sectors_delta = 0; 29901c6fdbd8SKent Overstreet struct disk_reservation disk_res = { 0 }; 2991190fa7afSKent Overstreet struct quota_res quota_res = { 0 }; 29921c6fdbd8SKent Overstreet struct bkey_i_reservation reservation; 29931c6fdbd8SKent Overstreet struct bkey_s_c k; 2994694015c2SKent Overstreet unsigned sectors; 29956fed42bbSKent Overstreet u32 snapshot; 29961c6fdbd8SKent Overstreet 2997163e885aSKent Overstreet bch2_trans_begin(&trans); 2998a8abd3a7SKent Overstreet 29996fed42bbSKent Overstreet ret = bch2_subvolume_get_snapshot(&trans, 30006fed42bbSKent Overstreet inode->ei_subvol, &snapshot); 30016fed42bbSKent Overstreet if (ret) 30026fed42bbSKent Overstreet goto bkey_err; 30036fed42bbSKent Overstreet 30046fed42bbSKent Overstreet bch2_btree_iter_set_snapshot(&iter, snapshot); 30056fed42bbSKent Overstreet 300667e0dd8fSKent Overstreet k = bch2_btree_iter_peek_slot(&iter); 30070f238367SKent Overstreet if ((ret = bkey_err(k))) 30080f238367SKent Overstreet goto bkey_err; 30091c6fdbd8SKent Overstreet 30101c6fdbd8SKent Overstreet /* already reserved */ 301126609b61SKent Overstreet if (k.k->type == KEY_TYPE_reservation && 30121c6fdbd8SKent Overstreet bkey_s_c_to_reservation(k).v->nr_replicas >= replicas) { 301367e0dd8fSKent Overstreet bch2_btree_iter_advance(&iter); 30141c6fdbd8SKent Overstreet continue; 30151c6fdbd8SKent Overstreet } 30161c6fdbd8SKent Overstreet 3017190fa7afSKent Overstreet if (bkey_extent_is_data(k.k) && 3018190fa7afSKent Overstreet !(mode & FALLOC_FL_ZERO_RANGE)) { 301967e0dd8fSKent Overstreet bch2_btree_iter_advance(&iter); 30201c6fdbd8SKent Overstreet continue; 30211c6fdbd8SKent Overstreet } 30221c6fdbd8SKent Overstreet 30231c6fdbd8SKent Overstreet bkey_reservation_init(&reservation.k_i); 302426609b61SKent Overstreet reservation.k.type = KEY_TYPE_reservation; 30251c6fdbd8SKent Overstreet reservation.k.p = k.k->p; 30261c6fdbd8SKent Overstreet reservation.k.size = k.k->size; 30271c6fdbd8SKent Overstreet 302867e0dd8fSKent Overstreet bch2_cut_front(iter.pos, &reservation.k_i); 3029085ab693SKent Overstreet bch2_cut_back(end_pos, &reservation.k_i); 30301c6fdbd8SKent Overstreet 30311c6fdbd8SKent Overstreet sectors = reservation.k.size; 30324de77495SKent Overstreet reservation.v.nr_replicas = bch2_bkey_nr_ptrs_allocated(k); 30331c6fdbd8SKent Overstreet 30341c6fdbd8SKent Overstreet if (!bkey_extent_is_allocation(k.k)) { 30351c6fdbd8SKent Overstreet ret = bch2_quota_reservation_add(c, inode, 3036190fa7afSKent Overstreet "a_res, 30371c6fdbd8SKent Overstreet sectors, true); 30381c6fdbd8SKent Overstreet if (unlikely(ret)) 30390f238367SKent Overstreet goto bkey_err; 30401c6fdbd8SKent Overstreet } 30411c6fdbd8SKent Overstreet 30421c6fdbd8SKent Overstreet if (reservation.v.nr_replicas < replicas || 30434de77495SKent Overstreet bch2_bkey_sectors_compressed(k)) { 30441c6fdbd8SKent Overstreet ret = bch2_disk_reservation_get(c, &disk_res, sectors, 30451c6fdbd8SKent Overstreet replicas, 0); 30461c6fdbd8SKent Overstreet if (unlikely(ret)) 30470f238367SKent Overstreet goto bkey_err; 30481c6fdbd8SKent Overstreet 30491c6fdbd8SKent Overstreet reservation.v.nr_replicas = disk_res.nr_replicas; 30501c6fdbd8SKent Overstreet } 30511c6fdbd8SKent Overstreet 30528c6d298aSKent Overstreet ret = bch2_extent_update(&trans, inode_inum(inode), &iter, 30538c6d298aSKent Overstreet &reservation.k_i, 305468a2054dSKent Overstreet &disk_res, NULL, 3055a6336910SKent Overstreet 0, &i_sectors_delta, true); 30568810386fSKent Overstreet if (ret) 30578810386fSKent Overstreet goto bkey_err; 30582e87eae1SKent Overstreet i_sectors_acct(c, inode, "a_res, i_sectors_delta); 30590f238367SKent Overstreet bkey_err: 3060190fa7afSKent Overstreet bch2_quota_reservation_put(c, inode, "a_res); 30611c6fdbd8SKent Overstreet bch2_disk_reservation_put(c, &disk_res); 3062549d173cSKent Overstreet if (bch2_err_matches(ret, BCH_ERR_transaction_restart)) 30631c6fdbd8SKent Overstreet ret = 0; 306450dc0f69SKent Overstreet } 306574163da7SKent Overstreet 3066dcfc593fSKent Overstreet bch2_trans_unlock(&trans); /* lock ordering, before taking pagecache locks: */ 3067dcfc593fSKent Overstreet mark_pagecache_reserved(inode, start_sector, iter.pos.offset); 3068dcfc593fSKent Overstreet 3069098ef98dSKent Overstreet if (bch2_err_matches(ret, ENOSPC) && (mode & FALLOC_FL_ZERO_RANGE)) { 307074163da7SKent Overstreet struct quota_res quota_res = { 0 }; 307174163da7SKent Overstreet s64 i_sectors_delta = 0; 307274163da7SKent Overstreet 307374163da7SKent Overstreet bch2_fpunch_at(&trans, &iter, inode_inum(inode), 307474163da7SKent Overstreet end_sector, &i_sectors_delta); 307574163da7SKent Overstreet i_sectors_acct(c, inode, "a_res, i_sectors_delta); 307674163da7SKent Overstreet bch2_quota_reservation_put(c, inode, "a_res); 307774163da7SKent Overstreet } 307874163da7SKent Overstreet 307967e0dd8fSKent Overstreet bch2_trans_iter_exit(&trans, &iter); 3080694015c2SKent Overstreet bch2_trans_exit(&trans); 3081694015c2SKent Overstreet return ret; 3082694015c2SKent Overstreet } 308350dc0f69SKent Overstreet 3084694015c2SKent Overstreet static long bchfs_fallocate(struct bch_inode_info *inode, int mode, 3085694015c2SKent Overstreet loff_t offset, loff_t len) 3086694015c2SKent Overstreet { 3087694015c2SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 308874163da7SKent Overstreet u64 end = offset + len; 308974163da7SKent Overstreet u64 block_start = round_down(offset, block_bytes(c)); 309074163da7SKent Overstreet u64 block_end = round_up(end, block_bytes(c)); 309174163da7SKent Overstreet bool truncated_last_page = false; 309274163da7SKent Overstreet int ret, ret2 = 0; 3093694015c2SKent Overstreet 3094694015c2SKent Overstreet if (!(mode & FALLOC_FL_KEEP_SIZE) && end > inode->v.i_size) { 3095694015c2SKent Overstreet ret = inode_newsize_ok(&inode->v, end); 3096694015c2SKent Overstreet if (ret) 309774163da7SKent Overstreet return ret; 3098694015c2SKent Overstreet } 3099694015c2SKent Overstreet 3100694015c2SKent Overstreet if (mode & FALLOC_FL_ZERO_RANGE) { 310174163da7SKent Overstreet ret = bch2_truncate_pages(inode, offset, end); 310274163da7SKent Overstreet if (unlikely(ret < 0)) 310374163da7SKent Overstreet return ret; 3104694015c2SKent Overstreet 310574163da7SKent Overstreet truncated_last_page = ret; 3106694015c2SKent Overstreet 3107694015c2SKent Overstreet truncate_pagecache_range(&inode->v, offset, end - 1); 310874163da7SKent Overstreet 310974163da7SKent Overstreet block_start = round_up(offset, block_bytes(c)); 311074163da7SKent Overstreet block_end = round_down(end, block_bytes(c)); 3111694015c2SKent Overstreet } 3112694015c2SKent Overstreet 3113694015c2SKent Overstreet ret = __bchfs_fallocate(inode, mode, block_start >> 9, block_end >> 9); 3114e0541a93SKent Overstreet 3115e0541a93SKent Overstreet /* 311674163da7SKent Overstreet * On -ENOSPC in ZERO_RANGE mode, we still want to do the inode update, 311774163da7SKent Overstreet * so that the VFS cache i_size is consistent with the btree i_size: 3118e0541a93SKent Overstreet */ 311974163da7SKent Overstreet if (ret && 3120098ef98dSKent Overstreet !(bch2_err_matches(ret, ENOSPC) && (mode & FALLOC_FL_ZERO_RANGE))) 312174163da7SKent Overstreet return ret; 31221c6fdbd8SKent Overstreet 312374163da7SKent Overstreet if (mode & FALLOC_FL_KEEP_SIZE && end > inode->v.i_size) 3124e0541a93SKent Overstreet end = inode->v.i_size; 312574163da7SKent Overstreet 312674163da7SKent Overstreet if (end >= inode->v.i_size && 312774163da7SKent Overstreet (((mode & FALLOC_FL_ZERO_RANGE) && !truncated_last_page) || 312874163da7SKent Overstreet !(mode & FALLOC_FL_KEEP_SIZE))) { 312974163da7SKent Overstreet spin_lock(&inode->v.i_lock); 3130e0541a93SKent Overstreet i_size_write(&inode->v, end); 313174163da7SKent Overstreet spin_unlock(&inode->v.i_lock); 3132e0541a93SKent Overstreet 31331c6fdbd8SKent Overstreet mutex_lock(&inode->ei_update_lock); 313474163da7SKent Overstreet ret2 = bch2_write_inode_size(c, inode, end, 0); 31351c6fdbd8SKent Overstreet mutex_unlock(&inode->ei_update_lock); 31361c6fdbd8SKent Overstreet } 313774163da7SKent Overstreet 313874163da7SKent Overstreet return ret ?: ret2; 31391c6fdbd8SKent Overstreet } 31401c6fdbd8SKent Overstreet 31411c6fdbd8SKent Overstreet long bch2_fallocate_dispatch(struct file *file, int mode, 31421c6fdbd8SKent Overstreet loff_t offset, loff_t len) 31431c6fdbd8SKent Overstreet { 31441c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 31452a9101a9SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 31462a9101a9SKent Overstreet long ret; 31472a9101a9SKent Overstreet 3148a3d7afa5SKent Overstreet if (!percpu_ref_tryget_live(&c->writes)) 31492a9101a9SKent Overstreet return -EROFS; 31501c6fdbd8SKent Overstreet 315174163da7SKent Overstreet inode_lock(&inode->v); 315274163da7SKent Overstreet inode_dio_wait(&inode->v); 315374163da7SKent Overstreet bch2_pagecache_block_get(&inode->ei_pagecache_lock); 315474163da7SKent Overstreet 315507bfcc0bSKent Overstreet ret = file_modified(file); 315607bfcc0bSKent Overstreet if (ret) 315707bfcc0bSKent Overstreet goto err; 315807bfcc0bSKent Overstreet 31591c6fdbd8SKent Overstreet if (!(mode & ~(FALLOC_FL_KEEP_SIZE|FALLOC_FL_ZERO_RANGE))) 31602a9101a9SKent Overstreet ret = bchfs_fallocate(inode, mode, offset, len); 31612a9101a9SKent Overstreet else if (mode == (FALLOC_FL_PUNCH_HOLE|FALLOC_FL_KEEP_SIZE)) 31622a9101a9SKent Overstreet ret = bchfs_fpunch(inode, offset, len); 31632a9101a9SKent Overstreet else if (mode == FALLOC_FL_INSERT_RANGE) 31642a9101a9SKent Overstreet ret = bchfs_fcollapse_finsert(inode, offset, len, true); 31652a9101a9SKent Overstreet else if (mode == FALLOC_FL_COLLAPSE_RANGE) 31662a9101a9SKent Overstreet ret = bchfs_fcollapse_finsert(inode, offset, len, false); 31672a9101a9SKent Overstreet else 31682a9101a9SKent Overstreet ret = -EOPNOTSUPP; 316907bfcc0bSKent Overstreet err: 317074163da7SKent Overstreet bch2_pagecache_block_put(&inode->ei_pagecache_lock); 317174163da7SKent Overstreet inode_unlock(&inode->v); 31722a9101a9SKent Overstreet percpu_ref_put(&c->writes); 31731c6fdbd8SKent Overstreet 31745c1ef830SKent Overstreet return bch2_err_class(ret); 31751c6fdbd8SKent Overstreet } 31761c6fdbd8SKent Overstreet 3177e8540e56SKent Overstreet static int quota_reserve_range(struct bch_inode_info *inode, 3178e8540e56SKent Overstreet struct quota_res *res, 3179e8540e56SKent Overstreet u64 start, u64 end) 3180e8540e56SKent Overstreet { 3181e8540e56SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 3182e8540e56SKent Overstreet struct btree_trans trans; 3183e8540e56SKent Overstreet struct btree_iter iter; 3184e8540e56SKent Overstreet struct bkey_s_c k; 3185e8540e56SKent Overstreet u32 snapshot; 3186e8540e56SKent Overstreet u64 sectors = end - start; 3187e8540e56SKent Overstreet u64 pos = start; 3188e8540e56SKent Overstreet int ret; 3189e8540e56SKent Overstreet 3190e8540e56SKent Overstreet bch2_trans_init(&trans, c, 0, 0); 3191e8540e56SKent Overstreet retry: 3192e8540e56SKent Overstreet bch2_trans_begin(&trans); 3193e8540e56SKent Overstreet 3194e8540e56SKent Overstreet ret = bch2_subvolume_get_snapshot(&trans, inode->ei_subvol, &snapshot); 3195e8540e56SKent Overstreet if (ret) 3196e8540e56SKent Overstreet goto err; 3197e8540e56SKent Overstreet 3198e8540e56SKent Overstreet bch2_trans_iter_init(&trans, &iter, BTREE_ID_extents, 3199e8540e56SKent Overstreet SPOS(inode->v.i_ino, pos, snapshot), 0); 3200e8540e56SKent Overstreet 3201e8540e56SKent Overstreet while (!(ret = btree_trans_too_many_iters(&trans)) && 3202e8540e56SKent Overstreet (k = bch2_btree_iter_peek_upto(&iter, POS(inode->v.i_ino, end - 1))).k && 3203e8540e56SKent Overstreet !(ret = bkey_err(k))) { 3204e8540e56SKent Overstreet if (bkey_extent_is_allocation(k.k)) { 3205e8540e56SKent Overstreet u64 s = min(end, k.k->p.offset) - 3206e8540e56SKent Overstreet max(start, bkey_start_offset(k.k)); 3207e8540e56SKent Overstreet BUG_ON(s > sectors); 3208e8540e56SKent Overstreet sectors -= s; 3209e8540e56SKent Overstreet } 3210e8540e56SKent Overstreet bch2_btree_iter_advance(&iter); 3211e8540e56SKent Overstreet } 3212e8540e56SKent Overstreet pos = iter.pos.offset; 3213e8540e56SKent Overstreet bch2_trans_iter_exit(&trans, &iter); 3214e8540e56SKent Overstreet err: 3215e8540e56SKent Overstreet if (bch2_err_matches(ret, BCH_ERR_transaction_restart)) 3216e8540e56SKent Overstreet goto retry; 3217e8540e56SKent Overstreet 3218e8540e56SKent Overstreet bch2_trans_exit(&trans); 3219e8540e56SKent Overstreet 3220e8540e56SKent Overstreet if (ret) 3221e8540e56SKent Overstreet return ret; 3222e8540e56SKent Overstreet 3223e8540e56SKent Overstreet return bch2_quota_reservation_add(c, inode, res, sectors, true); 3224e8540e56SKent Overstreet } 3225e8540e56SKent Overstreet 322676426098SKent Overstreet loff_t bch2_remap_file_range(struct file *file_src, loff_t pos_src, 322776426098SKent Overstreet struct file *file_dst, loff_t pos_dst, 322876426098SKent Overstreet loff_t len, unsigned remap_flags) 322976426098SKent Overstreet { 323076426098SKent Overstreet struct bch_inode_info *src = file_bch_inode(file_src); 323176426098SKent Overstreet struct bch_inode_info *dst = file_bch_inode(file_dst); 323276426098SKent Overstreet struct bch_fs *c = src->v.i_sb->s_fs_info; 3233e8540e56SKent Overstreet struct quota_res quota_res = { 0 }; 32342e87eae1SKent Overstreet s64 i_sectors_delta = 0; 3235677fc056SKent Overstreet u64 aligned_len; 323676426098SKent Overstreet loff_t ret = 0; 323776426098SKent Overstreet 323876426098SKent Overstreet if (remap_flags & ~(REMAP_FILE_DEDUP|REMAP_FILE_ADVISORY)) 323976426098SKent Overstreet return -EINVAL; 324076426098SKent Overstreet 324176426098SKent Overstreet if (remap_flags & REMAP_FILE_DEDUP) 324276426098SKent Overstreet return -EOPNOTSUPP; 324376426098SKent Overstreet 324476426098SKent Overstreet if ((pos_src & (block_bytes(c) - 1)) || 324576426098SKent Overstreet (pos_dst & (block_bytes(c) - 1))) 324676426098SKent Overstreet return -EINVAL; 324776426098SKent Overstreet 324876426098SKent Overstreet if (src == dst && 324976426098SKent Overstreet abs(pos_src - pos_dst) < len) 325076426098SKent Overstreet return -EINVAL; 325176426098SKent Overstreet 325276426098SKent Overstreet bch2_lock_inodes(INODE_LOCK|INODE_PAGECACHE_BLOCK, src, dst); 325376426098SKent Overstreet 325476426098SKent Overstreet inode_dio_wait(&src->v); 325576426098SKent Overstreet inode_dio_wait(&dst->v); 325676426098SKent Overstreet 325776426098SKent Overstreet ret = generic_remap_file_range_prep(file_src, pos_src, 325876426098SKent Overstreet file_dst, pos_dst, 325976426098SKent Overstreet &len, remap_flags); 326076426098SKent Overstreet if (ret < 0 || len == 0) 32612e87eae1SKent Overstreet goto err; 326276426098SKent Overstreet 3263677fc056SKent Overstreet aligned_len = round_up((u64) len, block_bytes(c)); 326476426098SKent Overstreet 326576426098SKent Overstreet ret = write_invalidate_inode_pages_range(dst->v.i_mapping, 3266677fc056SKent Overstreet pos_dst, pos_dst + len - 1); 326776426098SKent Overstreet if (ret) 32682e87eae1SKent Overstreet goto err; 326976426098SKent Overstreet 3270e8540e56SKent Overstreet ret = quota_reserve_range(dst, "a_res, pos_dst >> 9, 3271e8540e56SKent Overstreet (pos_dst + aligned_len) >> 9); 3272e8540e56SKent Overstreet if (ret) 3273e8540e56SKent Overstreet goto err; 3274e8540e56SKent Overstreet 3275e8540e56SKent Overstreet file_update_time(file_dst); 3276e8540e56SKent Overstreet 3277dcfc593fSKent Overstreet mark_pagecache_unallocated(src, pos_src >> 9, 3278dcfc593fSKent Overstreet (pos_src + aligned_len) >> 9); 327976426098SKent Overstreet 32802e87eae1SKent Overstreet ret = bch2_remap_range(c, 32816fed42bbSKent Overstreet inode_inum(dst), pos_dst >> 9, 32826fed42bbSKent Overstreet inode_inum(src), pos_src >> 9, 328376426098SKent Overstreet aligned_len >> 9, 32842e87eae1SKent Overstreet pos_dst + len, &i_sectors_delta); 32852e87eae1SKent Overstreet if (ret < 0) 32862e87eae1SKent Overstreet goto err; 328776426098SKent Overstreet 32882e87eae1SKent Overstreet /* 32892e87eae1SKent Overstreet * due to alignment, we might have remapped slightly more than requsted 32902e87eae1SKent Overstreet */ 3291677fc056SKent Overstreet ret = min((u64) ret << 9, (u64) len); 32922e87eae1SKent Overstreet 3293e8540e56SKent Overstreet i_sectors_acct(c, dst, "a_res, i_sectors_delta); 32942e87eae1SKent Overstreet 32952e87eae1SKent Overstreet spin_lock(&dst->v.i_lock); 3296677fc056SKent Overstreet if (pos_dst + ret > dst->v.i_size) 3297677fc056SKent Overstreet i_size_write(&dst->v, pos_dst + ret); 32982e87eae1SKent Overstreet spin_unlock(&dst->v.i_lock); 3299e7084c9cSKent Overstreet 330068a2054dSKent Overstreet if ((file_dst->f_flags & (__O_SYNC | O_DSYNC)) || 330168a2054dSKent Overstreet IS_SYNC(file_inode(file_dst))) 330268a2054dSKent Overstreet ret = bch2_flush_inode(c, inode_inum(dst)); 33032e87eae1SKent Overstreet err: 3304e8540e56SKent Overstreet bch2_quota_reservation_put(c, dst, "a_res); 330576426098SKent Overstreet bch2_unlock_inodes(INODE_LOCK|INODE_PAGECACHE_BLOCK, src, dst); 330676426098SKent Overstreet 33075c1ef830SKent Overstreet return bch2_err_class(ret); 330876426098SKent Overstreet } 330976426098SKent Overstreet 33101c6fdbd8SKent Overstreet /* fseek: */ 33111c6fdbd8SKent Overstreet 3312543ef2ebSKent Overstreet static int folio_data_offset(struct folio *folio, unsigned offset) 33131c6fdbd8SKent Overstreet { 3314f57a6a5dSKent Overstreet struct bch_page_state *s = bch2_page_state(&folio->page); 3315f57a6a5dSKent Overstreet unsigned i; 3316f81b648dSKent Overstreet 3317543ef2ebSKent Overstreet if (s) 3318543ef2ebSKent Overstreet for (i = offset >> 9; i < PAGE_SECTORS; i++) 3319f57a6a5dSKent Overstreet if (s->s[i].state >= SECTOR_DIRTY) 3320543ef2ebSKent Overstreet return i << 9; 3321f57a6a5dSKent Overstreet 3322543ef2ebSKent Overstreet return -1; 33231c6fdbd8SKent Overstreet } 33241c6fdbd8SKent Overstreet 3325543ef2ebSKent Overstreet static loff_t bch2_seek_pagecache_data(struct inode *vinode, 33261c6fdbd8SKent Overstreet loff_t start_offset, 33271c6fdbd8SKent Overstreet loff_t end_offset) 33281c6fdbd8SKent Overstreet { 33291c6fdbd8SKent Overstreet struct folio_batch fbatch; 33301c6fdbd8SKent Overstreet pgoff_t start_index = start_offset >> PAGE_SHIFT; 33311c6fdbd8SKent Overstreet pgoff_t end_index = end_offset >> PAGE_SHIFT; 33321c6fdbd8SKent Overstreet pgoff_t index = start_index; 33331c6fdbd8SKent Overstreet unsigned i; 3334543ef2ebSKent Overstreet loff_t ret; 3335543ef2ebSKent Overstreet int offset; 33361c6fdbd8SKent Overstreet 33371c6fdbd8SKent Overstreet folio_batch_init(&fbatch); 33381c6fdbd8SKent Overstreet 33391c6fdbd8SKent Overstreet while (filemap_get_folios(vinode->i_mapping, 33401c6fdbd8SKent Overstreet &index, end_index, &fbatch)) { 33411c6fdbd8SKent Overstreet for (i = 0; i < folio_batch_count(&fbatch); i++) { 33421c6fdbd8SKent Overstreet struct folio *folio = fbatch.folios[i]; 33431c6fdbd8SKent Overstreet 33441c6fdbd8SKent Overstreet folio_lock(folio); 3345543ef2ebSKent Overstreet offset = folio_data_offset(folio, 3346543ef2ebSKent Overstreet folio->index == start_index 3347543ef2ebSKent Overstreet ? start_offset & (PAGE_SIZE - 1) 3348543ef2ebSKent Overstreet : 0); 3349543ef2ebSKent Overstreet if (offset >= 0) { 3350543ef2ebSKent Overstreet ret = clamp(((loff_t) folio->index << PAGE_SHIFT) + 3351543ef2ebSKent Overstreet offset, 3352543ef2ebSKent Overstreet start_offset, end_offset); 33531c6fdbd8SKent Overstreet folio_unlock(folio); 33541c6fdbd8SKent Overstreet folio_batch_release(&fbatch); 3355543ef2ebSKent Overstreet return ret; 33561c6fdbd8SKent Overstreet } 33571c6fdbd8SKent Overstreet folio_unlock(folio); 33581c6fdbd8SKent Overstreet } 33591c6fdbd8SKent Overstreet folio_batch_release(&fbatch); 33601c6fdbd8SKent Overstreet cond_resched(); 33611c6fdbd8SKent Overstreet } 33621c6fdbd8SKent Overstreet 33631c6fdbd8SKent Overstreet return end_offset; 33641c6fdbd8SKent Overstreet } 33651c6fdbd8SKent Overstreet 33661c6fdbd8SKent Overstreet static loff_t bch2_seek_data(struct file *file, u64 offset) 33671c6fdbd8SKent Overstreet { 33681c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 33691c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 3370424eb881SKent Overstreet struct btree_trans trans; 337167e0dd8fSKent Overstreet struct btree_iter iter; 33721c6fdbd8SKent Overstreet struct bkey_s_c k; 33736fed42bbSKent Overstreet subvol_inum inum = inode_inum(inode); 33741c6fdbd8SKent Overstreet u64 isize, next_data = MAX_LFS_FILESIZE; 33756fed42bbSKent Overstreet u32 snapshot; 33761c6fdbd8SKent Overstreet int ret; 33771c6fdbd8SKent Overstreet 33781c6fdbd8SKent Overstreet isize = i_size_read(&inode->v); 33791c6fdbd8SKent Overstreet if (offset >= isize) 33801c6fdbd8SKent Overstreet return -ENXIO; 33811c6fdbd8SKent Overstreet 338220bceecbSKent Overstreet bch2_trans_init(&trans, c, 0, 0); 33836fed42bbSKent Overstreet retry: 33846fed42bbSKent Overstreet bch2_trans_begin(&trans); 33856fed42bbSKent Overstreet 33866fed42bbSKent Overstreet ret = bch2_subvolume_get_snapshot(&trans, inum.subvol, &snapshot); 33876fed42bbSKent Overstreet if (ret) 33886fed42bbSKent Overstreet goto err; 3389424eb881SKent Overstreet 3390e5fa91d7SKent Overstreet for_each_btree_key_norestart(&trans, iter, BTREE_ID_extents, 33916fed42bbSKent Overstreet SPOS(inode->v.i_ino, offset >> 9, snapshot), 0, k, ret) { 33921c6fdbd8SKent Overstreet if (k.k->p.inode != inode->v.i_ino) { 33931c6fdbd8SKent Overstreet break; 33941c6fdbd8SKent Overstreet } else if (bkey_extent_is_data(k.k)) { 33951c6fdbd8SKent Overstreet next_data = max(offset, bkey_start_offset(k.k) << 9); 33961c6fdbd8SKent Overstreet break; 33971c6fdbd8SKent Overstreet } else if (k.k->p.offset >> 9 > isize) 33981c6fdbd8SKent Overstreet break; 33991c6fdbd8SKent Overstreet } 340067e0dd8fSKent Overstreet bch2_trans_iter_exit(&trans, &iter); 34016fed42bbSKent Overstreet err: 3402549d173cSKent Overstreet if (bch2_err_matches(ret, BCH_ERR_transaction_restart)) 34036fed42bbSKent Overstreet goto retry; 34041c6fdbd8SKent Overstreet 34059a796fdbSKent Overstreet bch2_trans_exit(&trans); 34061c6fdbd8SKent Overstreet if (ret) 34071c6fdbd8SKent Overstreet return ret; 34081c6fdbd8SKent Overstreet 34091c6fdbd8SKent Overstreet if (next_data > offset) 3410543ef2ebSKent Overstreet next_data = bch2_seek_pagecache_data(&inode->v, 34111c6fdbd8SKent Overstreet offset, next_data); 34121c6fdbd8SKent Overstreet 3413e10d3094SKent Overstreet if (next_data >= isize) 34141c6fdbd8SKent Overstreet return -ENXIO; 34151c6fdbd8SKent Overstreet 34161c6fdbd8SKent Overstreet return vfs_setpos(file, next_data, MAX_LFS_FILESIZE); 34171c6fdbd8SKent Overstreet } 34181c6fdbd8SKent Overstreet 3419543ef2ebSKent Overstreet static int __page_hole_offset(struct page *page, unsigned offset) 34201c6fdbd8SKent Overstreet { 3421543ef2ebSKent Overstreet struct bch_page_state *s = bch2_page_state(page); 3422543ef2ebSKent Overstreet unsigned i; 3423543ef2ebSKent Overstreet 3424543ef2ebSKent Overstreet if (!s) 3425543ef2ebSKent Overstreet return 0; 3426543ef2ebSKent Overstreet 3427543ef2ebSKent Overstreet for (i = offset >> 9; i < PAGE_SECTORS; i++) 3428543ef2ebSKent Overstreet if (s->s[i].state < SECTOR_DIRTY) 3429543ef2ebSKent Overstreet return i << 9; 3430543ef2ebSKent Overstreet 3431543ef2ebSKent Overstreet return -1; 3432543ef2ebSKent Overstreet } 3433543ef2ebSKent Overstreet 3434543ef2ebSKent Overstreet static loff_t page_hole_offset(struct address_space *mapping, loff_t offset) 3435543ef2ebSKent Overstreet { 3436543ef2ebSKent Overstreet pgoff_t index = offset >> PAGE_SHIFT; 34371c6fdbd8SKent Overstreet struct page *page; 3438543ef2ebSKent Overstreet int pg_offset; 3439543ef2ebSKent Overstreet loff_t ret = -1; 34401c6fdbd8SKent Overstreet 34411c6fdbd8SKent Overstreet page = find_lock_page(mapping, index); 34421c6fdbd8SKent Overstreet if (!page) 3443543ef2ebSKent Overstreet return offset; 34441c6fdbd8SKent Overstreet 3445543ef2ebSKent Overstreet pg_offset = __page_hole_offset(page, offset & (PAGE_SIZE - 1)); 3446543ef2ebSKent Overstreet if (pg_offset >= 0) 3447543ef2ebSKent Overstreet ret = ((loff_t) index << PAGE_SHIFT) + pg_offset; 3448543ef2ebSKent Overstreet 34491c6fdbd8SKent Overstreet unlock_page(page); 34501c6fdbd8SKent Overstreet 34511c6fdbd8SKent Overstreet return ret; 34521c6fdbd8SKent Overstreet } 34531c6fdbd8SKent Overstreet 3454543ef2ebSKent Overstreet static loff_t bch2_seek_pagecache_hole(struct inode *vinode, 34551c6fdbd8SKent Overstreet loff_t start_offset, 34561c6fdbd8SKent Overstreet loff_t end_offset) 34571c6fdbd8SKent Overstreet { 34581c6fdbd8SKent Overstreet struct address_space *mapping = vinode->i_mapping; 3459543ef2ebSKent Overstreet loff_t offset = start_offset, hole; 34601c6fdbd8SKent Overstreet 3461543ef2ebSKent Overstreet while (offset < end_offset) { 3462543ef2ebSKent Overstreet hole = page_hole_offset(mapping, offset); 3463543ef2ebSKent Overstreet if (hole >= 0 && hole <= end_offset) 3464543ef2ebSKent Overstreet return max(start_offset, hole); 3465543ef2ebSKent Overstreet 3466543ef2ebSKent Overstreet offset += PAGE_SIZE; 3467543ef2ebSKent Overstreet offset &= PAGE_MASK; 3468543ef2ebSKent Overstreet } 34691c6fdbd8SKent Overstreet 34701c6fdbd8SKent Overstreet return end_offset; 34711c6fdbd8SKent Overstreet } 34721c6fdbd8SKent Overstreet 34731c6fdbd8SKent Overstreet static loff_t bch2_seek_hole(struct file *file, u64 offset) 34741c6fdbd8SKent Overstreet { 34751c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 34761c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 3477424eb881SKent Overstreet struct btree_trans trans; 347867e0dd8fSKent Overstreet struct btree_iter iter; 34791c6fdbd8SKent Overstreet struct bkey_s_c k; 34806fed42bbSKent Overstreet subvol_inum inum = inode_inum(inode); 34811c6fdbd8SKent Overstreet u64 isize, next_hole = MAX_LFS_FILESIZE; 34826fed42bbSKent Overstreet u32 snapshot; 34831c6fdbd8SKent Overstreet int ret; 34841c6fdbd8SKent Overstreet 34851c6fdbd8SKent Overstreet isize = i_size_read(&inode->v); 34861c6fdbd8SKent Overstreet if (offset >= isize) 34871c6fdbd8SKent Overstreet return -ENXIO; 34881c6fdbd8SKent Overstreet 348920bceecbSKent Overstreet bch2_trans_init(&trans, c, 0, 0); 34906fed42bbSKent Overstreet retry: 34916fed42bbSKent Overstreet bch2_trans_begin(&trans); 34926fed42bbSKent Overstreet 34936fed42bbSKent Overstreet ret = bch2_subvolume_get_snapshot(&trans, inum.subvol, &snapshot); 34946fed42bbSKent Overstreet if (ret) 34956fed42bbSKent Overstreet goto err; 3496424eb881SKent Overstreet 3497e5fa91d7SKent Overstreet for_each_btree_key_norestart(&trans, iter, BTREE_ID_extents, 34986fed42bbSKent Overstreet SPOS(inode->v.i_ino, offset >> 9, snapshot), 349994f651e2SKent Overstreet BTREE_ITER_SLOTS, k, ret) { 35001c6fdbd8SKent Overstreet if (k.k->p.inode != inode->v.i_ino) { 3501543ef2ebSKent Overstreet next_hole = bch2_seek_pagecache_hole(&inode->v, 35021c6fdbd8SKent Overstreet offset, MAX_LFS_FILESIZE); 35031c6fdbd8SKent Overstreet break; 35041c6fdbd8SKent Overstreet } else if (!bkey_extent_is_data(k.k)) { 3505543ef2ebSKent Overstreet next_hole = bch2_seek_pagecache_hole(&inode->v, 35061c6fdbd8SKent Overstreet max(offset, bkey_start_offset(k.k) << 9), 35071c6fdbd8SKent Overstreet k.k->p.offset << 9); 35081c6fdbd8SKent Overstreet 35091c6fdbd8SKent Overstreet if (next_hole < k.k->p.offset << 9) 35101c6fdbd8SKent Overstreet break; 35111c6fdbd8SKent Overstreet } else { 35121c6fdbd8SKent Overstreet offset = max(offset, bkey_start_offset(k.k) << 9); 35131c6fdbd8SKent Overstreet } 35141c6fdbd8SKent Overstreet } 351567e0dd8fSKent Overstreet bch2_trans_iter_exit(&trans, &iter); 35166fed42bbSKent Overstreet err: 3517549d173cSKent Overstreet if (bch2_err_matches(ret, BCH_ERR_transaction_restart)) 35186fed42bbSKent Overstreet goto retry; 35191c6fdbd8SKent Overstreet 35209a796fdbSKent Overstreet bch2_trans_exit(&trans); 35211c6fdbd8SKent Overstreet if (ret) 35221c6fdbd8SKent Overstreet return ret; 35231c6fdbd8SKent Overstreet 35241c6fdbd8SKent Overstreet if (next_hole > isize) 35251c6fdbd8SKent Overstreet next_hole = isize; 35261c6fdbd8SKent Overstreet 35271c6fdbd8SKent Overstreet return vfs_setpos(file, next_hole, MAX_LFS_FILESIZE); 35281c6fdbd8SKent Overstreet } 35291c6fdbd8SKent Overstreet 35301c6fdbd8SKent Overstreet loff_t bch2_llseek(struct file *file, loff_t offset, int whence) 35311c6fdbd8SKent Overstreet { 35325c1ef830SKent Overstreet loff_t ret; 35335c1ef830SKent Overstreet 35341c6fdbd8SKent Overstreet switch (whence) { 35351c6fdbd8SKent Overstreet case SEEK_SET: 35361c6fdbd8SKent Overstreet case SEEK_CUR: 35371c6fdbd8SKent Overstreet case SEEK_END: 35385c1ef830SKent Overstreet ret = generic_file_llseek(file, offset, whence); 35395c1ef830SKent Overstreet break; 35401c6fdbd8SKent Overstreet case SEEK_DATA: 35415c1ef830SKent Overstreet ret = bch2_seek_data(file, offset); 35425c1ef830SKent Overstreet break; 35431c6fdbd8SKent Overstreet case SEEK_HOLE: 35445c1ef830SKent Overstreet ret = bch2_seek_hole(file, offset); 35455c1ef830SKent Overstreet break; 35465c1ef830SKent Overstreet default: 35475c1ef830SKent Overstreet ret = -EINVAL; 35485c1ef830SKent Overstreet break; 35491c6fdbd8SKent Overstreet } 35501c6fdbd8SKent Overstreet 35515c1ef830SKent Overstreet return bch2_err_class(ret); 35521c6fdbd8SKent Overstreet } 35531c6fdbd8SKent Overstreet 35541c6fdbd8SKent Overstreet void bch2_fs_fsio_exit(struct bch_fs *c) 35551c6fdbd8SKent Overstreet { 35561c6fdbd8SKent Overstreet bioset_exit(&c->dio_write_bioset); 35571c6fdbd8SKent Overstreet bioset_exit(&c->dio_read_bioset); 35581c6fdbd8SKent Overstreet bioset_exit(&c->writepage_bioset); 35591c6fdbd8SKent Overstreet } 35601c6fdbd8SKent Overstreet 35611c6fdbd8SKent Overstreet int bch2_fs_fsio_init(struct bch_fs *c) 35621c6fdbd8SKent Overstreet { 35631c6fdbd8SKent Overstreet int ret = 0; 35641c6fdbd8SKent Overstreet 35651c6fdbd8SKent Overstreet pr_verbose_init(c->opts, ""); 35661c6fdbd8SKent Overstreet 35671c6fdbd8SKent Overstreet if (bioset_init(&c->writepage_bioset, 35689a3df993SKent Overstreet 4, offsetof(struct bch_writepage_io, op.wbio.bio), 35691c6fdbd8SKent Overstreet BIOSET_NEED_BVECS) || 35701c6fdbd8SKent Overstreet bioset_init(&c->dio_read_bioset, 35711c6fdbd8SKent Overstreet 4, offsetof(struct dio_read, rbio.bio), 35721c6fdbd8SKent Overstreet BIOSET_NEED_BVECS) || 35731c6fdbd8SKent Overstreet bioset_init(&c->dio_write_bioset, 35749a3df993SKent Overstreet 4, offsetof(struct dio_write, op.wbio.bio), 35751c6fdbd8SKent Overstreet BIOSET_NEED_BVECS)) 35761c6fdbd8SKent Overstreet ret = -ENOMEM; 35771c6fdbd8SKent Overstreet 35781c6fdbd8SKent Overstreet pr_verbose_init(c->opts, "ret %i", ret); 35791c6fdbd8SKent Overstreet return ret; 35801c6fdbd8SKent Overstreet } 35811c6fdbd8SKent Overstreet 35821c6fdbd8SKent Overstreet #endif /* NO_BCACHEFS_FS */ 3583