11c6fdbd8SKent Overstreet // SPDX-License-Identifier: GPL-2.0 21c6fdbd8SKent Overstreet #ifndef NO_BCACHEFS_FS 31c6fdbd8SKent Overstreet 41c6fdbd8SKent Overstreet #include "bcachefs.h" 57b3f84eaSKent Overstreet #include "alloc_foreground.h" 607a1006aSKent Overstreet #include "bkey_buf.h" 71c6fdbd8SKent Overstreet #include "btree_update.h" 81c6fdbd8SKent Overstreet #include "buckets.h" 91c6fdbd8SKent Overstreet #include "clock.h" 101c6fdbd8SKent Overstreet #include "error.h" 11e2d9912cSKent Overstreet #include "extents.h" 1208c07feaSKent Overstreet #include "extent_update.h" 131c6fdbd8SKent Overstreet #include "fs.h" 141c6fdbd8SKent Overstreet #include "fs-io.h" 151c6fdbd8SKent Overstreet #include "fsck.h" 161c6fdbd8SKent Overstreet #include "inode.h" 171c6fdbd8SKent Overstreet #include "journal.h" 181c6fdbd8SKent Overstreet #include "io.h" 191c6fdbd8SKent Overstreet #include "keylist.h" 201c6fdbd8SKent Overstreet #include "quota.h" 2176426098SKent Overstreet #include "reflink.h" 221c6fdbd8SKent Overstreet #include "trace.h" 231c6fdbd8SKent Overstreet 241c6fdbd8SKent Overstreet #include <linux/aio.h> 251c6fdbd8SKent Overstreet #include <linux/backing-dev.h> 261c6fdbd8SKent Overstreet #include <linux/falloc.h> 271c6fdbd8SKent Overstreet #include <linux/migrate.h> 281c6fdbd8SKent Overstreet #include <linux/mmu_context.h> 291c6fdbd8SKent Overstreet #include <linux/pagevec.h> 309ba2eb25SKent Overstreet #include <linux/rmap.h> 311c6fdbd8SKent Overstreet #include <linux/sched/signal.h> 321c6fdbd8SKent Overstreet #include <linux/task_io_accounting_ops.h> 331c6fdbd8SKent Overstreet #include <linux/uio.h> 341c6fdbd8SKent Overstreet #include <linux/writeback.h> 351c6fdbd8SKent Overstreet 361c6fdbd8SKent Overstreet #include <trace/events/writeback.h> 371c6fdbd8SKent Overstreet 387f5e31e1SKent Overstreet static inline bool bio_full(struct bio *bio, unsigned len) 397f5e31e1SKent Overstreet { 407f5e31e1SKent Overstreet if (bio->bi_vcnt >= bio->bi_max_vecs) 417f5e31e1SKent Overstreet return true; 427f5e31e1SKent Overstreet if (bio->bi_iter.bi_size > UINT_MAX - len) 437f5e31e1SKent Overstreet return true; 447f5e31e1SKent Overstreet return false; 457f5e31e1SKent Overstreet } 467f5e31e1SKent Overstreet 47eb8e6e9cSKent Overstreet static inline struct address_space *faults_disabled_mapping(void) 48eb8e6e9cSKent Overstreet { 49eb8e6e9cSKent Overstreet return (void *) (((unsigned long) current->faults_disabled_mapping) & ~1UL); 50eb8e6e9cSKent Overstreet } 51eb8e6e9cSKent Overstreet 52eb8e6e9cSKent Overstreet static inline void set_fdm_dropped_locks(void) 53eb8e6e9cSKent Overstreet { 54eb8e6e9cSKent Overstreet current->faults_disabled_mapping = 55eb8e6e9cSKent Overstreet (void *) (((unsigned long) current->faults_disabled_mapping)|1); 56eb8e6e9cSKent Overstreet } 57eb8e6e9cSKent Overstreet 58eb8e6e9cSKent Overstreet static inline bool fdm_dropped_locks(void) 59eb8e6e9cSKent Overstreet { 60eb8e6e9cSKent Overstreet return ((unsigned long) current->faults_disabled_mapping) & 1; 61eb8e6e9cSKent Overstreet } 62eb8e6e9cSKent Overstreet 631c6fdbd8SKent Overstreet struct quota_res { 641c6fdbd8SKent Overstreet u64 sectors; 651c6fdbd8SKent Overstreet }; 661c6fdbd8SKent Overstreet 679a3df993SKent Overstreet struct bch_writepage_io { 681c6fdbd8SKent Overstreet struct bch_inode_info *inode; 691c6fdbd8SKent Overstreet 701c6fdbd8SKent Overstreet /* must be last: */ 711c6fdbd8SKent Overstreet struct bch_write_op op; 721c6fdbd8SKent Overstreet }; 731c6fdbd8SKent Overstreet 741c6fdbd8SKent Overstreet struct dio_write { 75f8f30863SKent Overstreet struct completion done; 761c6fdbd8SKent Overstreet struct kiocb *req; 77ed484030SKent Overstreet struct mm_struct *mm; 781c6fdbd8SKent Overstreet unsigned loop:1, 791c6fdbd8SKent Overstreet sync:1, 801c6fdbd8SKent Overstreet free_iov:1; 811c6fdbd8SKent Overstreet struct quota_res quota_res; 82042a1f26SKent Overstreet u64 written; 831c6fdbd8SKent Overstreet 841c6fdbd8SKent Overstreet struct iov_iter iter; 851c6fdbd8SKent Overstreet struct iovec inline_vecs[2]; 861c6fdbd8SKent Overstreet 871c6fdbd8SKent Overstreet /* must be last: */ 889a3df993SKent Overstreet struct bch_write_op op; 891c6fdbd8SKent Overstreet }; 901c6fdbd8SKent Overstreet 911c6fdbd8SKent Overstreet struct dio_read { 921c6fdbd8SKent Overstreet struct closure cl; 931c6fdbd8SKent Overstreet struct kiocb *req; 941c6fdbd8SKent Overstreet long ret; 95b4725cc1SKent Overstreet bool should_dirty; 961c6fdbd8SKent Overstreet struct bch_read_bio rbio; 971c6fdbd8SKent Overstreet }; 981c6fdbd8SKent Overstreet 991c6fdbd8SKent Overstreet /* pagecache_block must be held */ 100a023127aSKent Overstreet static noinline int write_invalidate_inode_pages_range(struct address_space *mapping, 1011c6fdbd8SKent Overstreet loff_t start, loff_t end) 1021c6fdbd8SKent Overstreet { 1031c6fdbd8SKent Overstreet int ret; 1041c6fdbd8SKent Overstreet 1051c6fdbd8SKent Overstreet /* 1061c6fdbd8SKent Overstreet * XXX: the way this is currently implemented, we can spin if a process 1071c6fdbd8SKent Overstreet * is continually redirtying a specific page 1081c6fdbd8SKent Overstreet */ 1091c6fdbd8SKent Overstreet do { 1101c6fdbd8SKent Overstreet if (!mapping->nrpages) 1111c6fdbd8SKent Overstreet return 0; 1121c6fdbd8SKent Overstreet 1131c6fdbd8SKent Overstreet ret = filemap_write_and_wait_range(mapping, start, end); 1141c6fdbd8SKent Overstreet if (ret) 1151c6fdbd8SKent Overstreet break; 1161c6fdbd8SKent Overstreet 1171c6fdbd8SKent Overstreet if (!mapping->nrpages) 1181c6fdbd8SKent Overstreet return 0; 1191c6fdbd8SKent Overstreet 1201c6fdbd8SKent Overstreet ret = invalidate_inode_pages2_range(mapping, 1211c6fdbd8SKent Overstreet start >> PAGE_SHIFT, 1221c6fdbd8SKent Overstreet end >> PAGE_SHIFT); 1231c6fdbd8SKent Overstreet } while (ret == -EBUSY); 1241c6fdbd8SKent Overstreet 1251c6fdbd8SKent Overstreet return ret; 1261c6fdbd8SKent Overstreet } 1271c6fdbd8SKent Overstreet 1281c6fdbd8SKent Overstreet /* quotas */ 1291c6fdbd8SKent Overstreet 1301c6fdbd8SKent Overstreet #ifdef CONFIG_BCACHEFS_QUOTA 1311c6fdbd8SKent Overstreet 1321c6fdbd8SKent Overstreet static void bch2_quota_reservation_put(struct bch_fs *c, 1331c6fdbd8SKent Overstreet struct bch_inode_info *inode, 1341c6fdbd8SKent Overstreet struct quota_res *res) 1351c6fdbd8SKent Overstreet { 1361c6fdbd8SKent Overstreet if (!res->sectors) 1371c6fdbd8SKent Overstreet return; 1381c6fdbd8SKent Overstreet 1391c6fdbd8SKent Overstreet mutex_lock(&inode->ei_quota_lock); 1401c6fdbd8SKent Overstreet BUG_ON(res->sectors > inode->ei_quota_reserved); 1411c6fdbd8SKent Overstreet 1421c6fdbd8SKent Overstreet bch2_quota_acct(c, inode->ei_qid, Q_SPC, 14326609b61SKent Overstreet -((s64) res->sectors), KEY_TYPE_QUOTA_PREALLOC); 1441c6fdbd8SKent Overstreet inode->ei_quota_reserved -= res->sectors; 1451c6fdbd8SKent Overstreet mutex_unlock(&inode->ei_quota_lock); 1461c6fdbd8SKent Overstreet 1471c6fdbd8SKent Overstreet res->sectors = 0; 1481c6fdbd8SKent Overstreet } 1491c6fdbd8SKent Overstreet 1501c6fdbd8SKent Overstreet static int bch2_quota_reservation_add(struct bch_fs *c, 1511c6fdbd8SKent Overstreet struct bch_inode_info *inode, 1521c6fdbd8SKent Overstreet struct quota_res *res, 1531c6fdbd8SKent Overstreet unsigned sectors, 1541c6fdbd8SKent Overstreet bool check_enospc) 1551c6fdbd8SKent Overstreet { 1561c6fdbd8SKent Overstreet int ret; 1571c6fdbd8SKent Overstreet 1581c6fdbd8SKent Overstreet mutex_lock(&inode->ei_quota_lock); 1591c6fdbd8SKent Overstreet ret = bch2_quota_acct(c, inode->ei_qid, Q_SPC, sectors, 16026609b61SKent Overstreet check_enospc ? KEY_TYPE_QUOTA_PREALLOC : KEY_TYPE_QUOTA_NOCHECK); 1611c6fdbd8SKent Overstreet if (likely(!ret)) { 1621c6fdbd8SKent Overstreet inode->ei_quota_reserved += sectors; 1631c6fdbd8SKent Overstreet res->sectors += sectors; 1641c6fdbd8SKent Overstreet } 1651c6fdbd8SKent Overstreet mutex_unlock(&inode->ei_quota_lock); 1661c6fdbd8SKent Overstreet 1671c6fdbd8SKent Overstreet return ret; 1681c6fdbd8SKent Overstreet } 1691c6fdbd8SKent Overstreet 1701c6fdbd8SKent Overstreet #else 1711c6fdbd8SKent Overstreet 1721c6fdbd8SKent Overstreet static void bch2_quota_reservation_put(struct bch_fs *c, 1731c6fdbd8SKent Overstreet struct bch_inode_info *inode, 1741c6fdbd8SKent Overstreet struct quota_res *res) 1751c6fdbd8SKent Overstreet { 1761c6fdbd8SKent Overstreet } 1771c6fdbd8SKent Overstreet 1781c6fdbd8SKent Overstreet static int bch2_quota_reservation_add(struct bch_fs *c, 1791c6fdbd8SKent Overstreet struct bch_inode_info *inode, 1801c6fdbd8SKent Overstreet struct quota_res *res, 1811c6fdbd8SKent Overstreet unsigned sectors, 1821c6fdbd8SKent Overstreet bool check_enospc) 1831c6fdbd8SKent Overstreet { 1841c6fdbd8SKent Overstreet return 0; 1851c6fdbd8SKent Overstreet } 1861c6fdbd8SKent Overstreet 1871c6fdbd8SKent Overstreet #endif 1881c6fdbd8SKent Overstreet 1891c6fdbd8SKent Overstreet /* i_size updates: */ 1901c6fdbd8SKent Overstreet 1912ea90048SKent Overstreet struct inode_new_size { 1922ea90048SKent Overstreet loff_t new_size; 1932ea90048SKent Overstreet u64 now; 1942ea90048SKent Overstreet unsigned fields; 1952ea90048SKent Overstreet }; 1962ea90048SKent Overstreet 1971c6fdbd8SKent Overstreet static int inode_set_size(struct bch_inode_info *inode, 1981c6fdbd8SKent Overstreet struct bch_inode_unpacked *bi, 1991c6fdbd8SKent Overstreet void *p) 2001c6fdbd8SKent Overstreet { 2012ea90048SKent Overstreet struct inode_new_size *s = p; 2021c6fdbd8SKent Overstreet 2032ea90048SKent Overstreet bi->bi_size = s->new_size; 2042ea90048SKent Overstreet if (s->fields & ATTR_ATIME) 2052ea90048SKent Overstreet bi->bi_atime = s->now; 2062ea90048SKent Overstreet if (s->fields & ATTR_MTIME) 2072ea90048SKent Overstreet bi->bi_mtime = s->now; 2082ea90048SKent Overstreet if (s->fields & ATTR_CTIME) 2092ea90048SKent Overstreet bi->bi_ctime = s->now; 2101c6fdbd8SKent Overstreet 2111c6fdbd8SKent Overstreet return 0; 2121c6fdbd8SKent Overstreet } 2131c6fdbd8SKent Overstreet 21476426098SKent Overstreet int __must_check bch2_write_inode_size(struct bch_fs *c, 2151c6fdbd8SKent Overstreet struct bch_inode_info *inode, 2162ea90048SKent Overstreet loff_t new_size, unsigned fields) 2171c6fdbd8SKent Overstreet { 2182ea90048SKent Overstreet struct inode_new_size s = { 2192ea90048SKent Overstreet .new_size = new_size, 2202ea90048SKent Overstreet .now = bch2_current_time(c), 2212ea90048SKent Overstreet .fields = fields, 2222ea90048SKent Overstreet }; 2232ea90048SKent Overstreet 2242ea90048SKent Overstreet return bch2_write_inode(c, inode, inode_set_size, &s, fields); 2251c6fdbd8SKent Overstreet } 2261c6fdbd8SKent Overstreet 2271c6fdbd8SKent Overstreet static void i_sectors_acct(struct bch_fs *c, struct bch_inode_info *inode, 228190fa7afSKent Overstreet struct quota_res *quota_res, s64 sectors) 2291c6fdbd8SKent Overstreet { 230190fa7afSKent Overstreet if (!sectors) 231190fa7afSKent Overstreet return; 232190fa7afSKent Overstreet 2331c6fdbd8SKent Overstreet mutex_lock(&inode->ei_quota_lock); 234b44a66a6SKent Overstreet BUG_ON((s64) inode->v.i_blocks + sectors < 0); 235b44a66a6SKent Overstreet inode->v.i_blocks += sectors; 236b44a66a6SKent Overstreet 2371c6fdbd8SKent Overstreet #ifdef CONFIG_BCACHEFS_QUOTA 2381c6fdbd8SKent Overstreet if (quota_res && sectors > 0) { 2391c6fdbd8SKent Overstreet BUG_ON(sectors > quota_res->sectors); 2401c6fdbd8SKent Overstreet BUG_ON(sectors > inode->ei_quota_reserved); 2411c6fdbd8SKent Overstreet 2421c6fdbd8SKent Overstreet quota_res->sectors -= sectors; 2431c6fdbd8SKent Overstreet inode->ei_quota_reserved -= sectors; 2441c6fdbd8SKent Overstreet } else { 24526609b61SKent Overstreet bch2_quota_acct(c, inode->ei_qid, Q_SPC, sectors, KEY_TYPE_QUOTA_WARN); 2461c6fdbd8SKent Overstreet } 2471c6fdbd8SKent Overstreet #endif 2481c6fdbd8SKent Overstreet mutex_unlock(&inode->ei_quota_lock); 2491c6fdbd8SKent Overstreet } 2501c6fdbd8SKent Overstreet 2511c6fdbd8SKent Overstreet /* page state: */ 2521c6fdbd8SKent Overstreet 2531c6fdbd8SKent Overstreet /* stored in page->private: */ 2541c6fdbd8SKent Overstreet 255f57a6a5dSKent Overstreet struct bch_page_sector { 256b44a66a6SKent Overstreet /* Uncompressed, fully allocated replicas (or on disk reservation): */ 257b44a66a6SKent Overstreet unsigned nr_replicas:4; 258f81b648dSKent Overstreet 259b44a66a6SKent Overstreet /* Owns PAGE_SECTORS * replicas_reserved sized in memory reservation: */ 260b44a66a6SKent Overstreet unsigned replicas_reserved:4; 2611c6fdbd8SKent Overstreet 262f57a6a5dSKent Overstreet /* i_sectors: */ 263f57a6a5dSKent Overstreet enum { 264f57a6a5dSKent Overstreet SECTOR_UNALLOCATED, 2652ba5d38bSKent Overstreet SECTOR_RESERVED, 266f57a6a5dSKent Overstreet SECTOR_DIRTY, 267b44a66a6SKent Overstreet SECTOR_DIRTY_RESERVED, 268f57a6a5dSKent Overstreet SECTOR_ALLOCATED, 269b44a66a6SKent Overstreet } state:8; 2701c6fdbd8SKent Overstreet }; 2711c6fdbd8SKent Overstreet 272f57a6a5dSKent Overstreet struct bch_page_state { 2733826ee0bSKent Overstreet spinlock_t lock; 2747f5e31e1SKent Overstreet atomic_t write_count; 275f57a6a5dSKent Overstreet struct bch_page_sector s[PAGE_SECTORS]; 276f57a6a5dSKent Overstreet }; 277f57a6a5dSKent Overstreet 278f57a6a5dSKent Overstreet static inline struct bch_page_state *__bch2_page_state(struct page *page) 2791c6fdbd8SKent Overstreet { 280f57a6a5dSKent Overstreet return page_has_private(page) 281f57a6a5dSKent Overstreet ? (struct bch_page_state *) page_private(page) 282f57a6a5dSKent Overstreet : NULL; 283f57a6a5dSKent Overstreet } 2841c6fdbd8SKent Overstreet 285f57a6a5dSKent Overstreet static inline struct bch_page_state *bch2_page_state(struct page *page) 286f57a6a5dSKent Overstreet { 287e1036a2aSKent Overstreet EBUG_ON(!PageLocked(page)); 2881c6fdbd8SKent Overstreet 289f57a6a5dSKent Overstreet return __bch2_page_state(page); 290f57a6a5dSKent Overstreet } 291f57a6a5dSKent Overstreet 292f57a6a5dSKent Overstreet /* for newly allocated pages: */ 293f57a6a5dSKent Overstreet static void __bch2_page_state_release(struct page *page) 294f57a6a5dSKent Overstreet { 29500276f9fSMatthew Wilcox (Oracle) kfree(detach_page_private(page)); 296f57a6a5dSKent Overstreet } 297f57a6a5dSKent Overstreet 298f57a6a5dSKent Overstreet static void bch2_page_state_release(struct page *page) 299f57a6a5dSKent Overstreet { 30000276f9fSMatthew Wilcox (Oracle) EBUG_ON(!PageLocked(page)); 30100276f9fSMatthew Wilcox (Oracle) __bch2_page_state_release(page); 302f57a6a5dSKent Overstreet } 303f57a6a5dSKent Overstreet 304f57a6a5dSKent Overstreet /* for newly allocated pages: */ 305f57a6a5dSKent Overstreet static struct bch_page_state *__bch2_page_state_create(struct page *page, 306f57a6a5dSKent Overstreet gfp_t gfp) 307f57a6a5dSKent Overstreet { 308f57a6a5dSKent Overstreet struct bch_page_state *s; 309f57a6a5dSKent Overstreet 310f57a6a5dSKent Overstreet s = kzalloc(sizeof(*s), GFP_NOFS|gfp); 311f57a6a5dSKent Overstreet if (!s) 312f57a6a5dSKent Overstreet return NULL; 313f57a6a5dSKent Overstreet 3143826ee0bSKent Overstreet spin_lock_init(&s->lock); 31500276f9fSMatthew Wilcox (Oracle) attach_page_private(page, s); 3161c6fdbd8SKent Overstreet return s; 3171c6fdbd8SKent Overstreet } 3181c6fdbd8SKent Overstreet 319f57a6a5dSKent Overstreet static struct bch_page_state *bch2_page_state_create(struct page *page, 320f57a6a5dSKent Overstreet gfp_t gfp) 321f57a6a5dSKent Overstreet { 322f57a6a5dSKent Overstreet return bch2_page_state(page) ?: __bch2_page_state_create(page, gfp); 323f57a6a5dSKent Overstreet } 324f57a6a5dSKent Overstreet 325b44a66a6SKent Overstreet static unsigned bkey_to_sector_state(const struct bkey *k) 326b44a66a6SKent Overstreet { 327b44a66a6SKent Overstreet if (k->type == KEY_TYPE_reservation) 328b44a66a6SKent Overstreet return SECTOR_RESERVED; 329b44a66a6SKent Overstreet if (bkey_extent_is_allocation(k)) 330b44a66a6SKent Overstreet return SECTOR_ALLOCATED; 331b44a66a6SKent Overstreet return SECTOR_UNALLOCATED; 332b44a66a6SKent Overstreet } 333b44a66a6SKent Overstreet 334b44a66a6SKent Overstreet static void bch2_bio_page_state_set(struct bio *bio, struct bkey_s_c k) 335b44a66a6SKent Overstreet { 336b44a66a6SKent Overstreet struct bvec_iter iter; 337b44a66a6SKent Overstreet struct bio_vec bv; 338b44a66a6SKent Overstreet unsigned nr_ptrs = k.k->type == KEY_TYPE_reflink_v 339b44a66a6SKent Overstreet ? 0 : bch2_bkey_nr_ptrs_fully_allocated(k); 340b44a66a6SKent Overstreet unsigned state = bkey_to_sector_state(k.k); 341b44a66a6SKent Overstreet 342b44a66a6SKent Overstreet bio_for_each_segment(bv, bio, iter) { 343b44a66a6SKent Overstreet struct bch_page_state *s = bch2_page_state(bv.bv_page); 344b44a66a6SKent Overstreet unsigned i; 345b44a66a6SKent Overstreet 346b44a66a6SKent Overstreet for (i = bv.bv_offset >> 9; 347b44a66a6SKent Overstreet i < (bv.bv_offset + bv.bv_len) >> 9; 348b44a66a6SKent Overstreet i++) { 349b44a66a6SKent Overstreet s->s[i].nr_replicas = nr_ptrs; 350b44a66a6SKent Overstreet s->s[i].state = state; 351b44a66a6SKent Overstreet } 352b44a66a6SKent Overstreet } 353b44a66a6SKent Overstreet } 354b44a66a6SKent Overstreet 355e1036a2aSKent Overstreet static inline unsigned inode_nr_replicas(struct bch_fs *c, struct bch_inode_info *inode) 356e1036a2aSKent Overstreet { 357e1036a2aSKent Overstreet /* XXX: this should not be open coded */ 358e1036a2aSKent Overstreet return inode->ei_inode.bi_data_replicas 359e1036a2aSKent Overstreet ? inode->ei_inode.bi_data_replicas - 1 360e1036a2aSKent Overstreet : c->opts.data_replicas; 361e1036a2aSKent Overstreet } 362e1036a2aSKent Overstreet 363f57a6a5dSKent Overstreet static inline unsigned sectors_to_reserve(struct bch_page_sector *s, 364f57a6a5dSKent Overstreet unsigned nr_replicas) 365f57a6a5dSKent Overstreet { 366f57a6a5dSKent Overstreet return max(0, (int) nr_replicas - 367f57a6a5dSKent Overstreet s->nr_replicas - 368f57a6a5dSKent Overstreet s->replicas_reserved); 369f57a6a5dSKent Overstreet } 370f57a6a5dSKent Overstreet 371f57a6a5dSKent Overstreet static int bch2_get_page_disk_reservation(struct bch_fs *c, 372f57a6a5dSKent Overstreet struct bch_inode_info *inode, 3731c6fdbd8SKent Overstreet struct page *page, bool check_enospc) 3741c6fdbd8SKent Overstreet { 375f57a6a5dSKent Overstreet struct bch_page_state *s = bch2_page_state_create(page, 0); 376e1036a2aSKent Overstreet unsigned nr_replicas = inode_nr_replicas(c, inode); 377f57a6a5dSKent Overstreet struct disk_reservation disk_res = { 0 }; 378f57a6a5dSKent Overstreet unsigned i, disk_res_sectors = 0; 379f81b648dSKent Overstreet int ret; 3801c6fdbd8SKent Overstreet 381f57a6a5dSKent Overstreet if (!s) 382f57a6a5dSKent Overstreet return -ENOMEM; 3831c6fdbd8SKent Overstreet 384f57a6a5dSKent Overstreet for (i = 0; i < ARRAY_SIZE(s->s); i++) 385f57a6a5dSKent Overstreet disk_res_sectors += sectors_to_reserve(&s->s[i], nr_replicas); 386f57a6a5dSKent Overstreet 387f57a6a5dSKent Overstreet if (!disk_res_sectors) 388f57a6a5dSKent Overstreet return 0; 389f57a6a5dSKent Overstreet 390f57a6a5dSKent Overstreet ret = bch2_disk_reservation_get(c, &disk_res, 391f57a6a5dSKent Overstreet disk_res_sectors, 1, 392f57a6a5dSKent Overstreet !check_enospc 393f57a6a5dSKent Overstreet ? BCH_DISK_RESERVATION_NOFAIL 394f57a6a5dSKent Overstreet : 0); 3951c6fdbd8SKent Overstreet if (unlikely(ret)) 396f81b648dSKent Overstreet return ret; 397f81b648dSKent Overstreet 398f57a6a5dSKent Overstreet for (i = 0; i < ARRAY_SIZE(s->s); i++) 399f57a6a5dSKent Overstreet s->s[i].replicas_reserved += 400f57a6a5dSKent Overstreet sectors_to_reserve(&s->s[i], nr_replicas); 401f57a6a5dSKent Overstreet 402f57a6a5dSKent Overstreet return 0; 4031c6fdbd8SKent Overstreet } 4041c6fdbd8SKent Overstreet 405d1542e03SKent Overstreet struct bch2_page_reservation { 406d1542e03SKent Overstreet struct disk_reservation disk; 407d1542e03SKent Overstreet struct quota_res quota; 408d1542e03SKent Overstreet }; 409d1542e03SKent Overstreet 410d1542e03SKent Overstreet static void bch2_page_reservation_init(struct bch_fs *c, 411f57a6a5dSKent Overstreet struct bch_inode_info *inode, 412d1542e03SKent Overstreet struct bch2_page_reservation *res) 413d1542e03SKent Overstreet { 414d1542e03SKent Overstreet memset(res, 0, sizeof(*res)); 415d1542e03SKent Overstreet 416d1542e03SKent Overstreet res->disk.nr_replicas = inode_nr_replicas(c, inode); 417d1542e03SKent Overstreet } 418d1542e03SKent Overstreet 419d1542e03SKent Overstreet static void bch2_page_reservation_put(struct bch_fs *c, 420d1542e03SKent Overstreet struct bch_inode_info *inode, 421d1542e03SKent Overstreet struct bch2_page_reservation *res) 422d1542e03SKent Overstreet { 423d1542e03SKent Overstreet bch2_disk_reservation_put(c, &res->disk); 424d1542e03SKent Overstreet bch2_quota_reservation_put(c, inode, &res->quota); 425d1542e03SKent Overstreet } 426d1542e03SKent Overstreet 427d1542e03SKent Overstreet static int bch2_page_reservation_get(struct bch_fs *c, 428d1542e03SKent Overstreet struct bch_inode_info *inode, struct page *page, 429d1542e03SKent Overstreet struct bch2_page_reservation *res, 430d1542e03SKent Overstreet unsigned offset, unsigned len, bool check_enospc) 431f57a6a5dSKent Overstreet { 432f57a6a5dSKent Overstreet struct bch_page_state *s = bch2_page_state_create(page, 0); 433d1542e03SKent Overstreet unsigned i, disk_sectors = 0, quota_sectors = 0; 434f57a6a5dSKent Overstreet int ret; 435f57a6a5dSKent Overstreet 436f57a6a5dSKent Overstreet if (!s) 437f57a6a5dSKent Overstreet return -ENOMEM; 438f57a6a5dSKent Overstreet 4394b0a66d5SKent Overstreet for (i = round_down(offset, block_bytes(c)) >> 9; 4404b0a66d5SKent Overstreet i < round_up(offset + len, block_bytes(c)) >> 9; 441d1542e03SKent Overstreet i++) { 442d1542e03SKent Overstreet disk_sectors += sectors_to_reserve(&s->s[i], 443d1542e03SKent Overstreet res->disk.nr_replicas); 444d1542e03SKent Overstreet quota_sectors += s->s[i].state == SECTOR_UNALLOCATED; 4451c6fdbd8SKent Overstreet } 4461c6fdbd8SKent Overstreet 447d1542e03SKent Overstreet if (disk_sectors) { 448d1542e03SKent Overstreet ret = bch2_disk_reservation_add(c, &res->disk, 449d1542e03SKent Overstreet disk_sectors, 450d1542e03SKent Overstreet !check_enospc 451d1542e03SKent Overstreet ? BCH_DISK_RESERVATION_NOFAIL 452d1542e03SKent Overstreet : 0); 453d1542e03SKent Overstreet if (unlikely(ret)) 454d1542e03SKent Overstreet return ret; 455d1542e03SKent Overstreet } 456d1542e03SKent Overstreet 457d1542e03SKent Overstreet if (quota_sectors) { 458d1542e03SKent Overstreet ret = bch2_quota_reservation_add(c, inode, &res->quota, 459d1542e03SKent Overstreet quota_sectors, 460d1542e03SKent Overstreet check_enospc); 461d1542e03SKent Overstreet if (unlikely(ret)) { 462d1542e03SKent Overstreet struct disk_reservation tmp = { 463d1542e03SKent Overstreet .sectors = disk_sectors 464d1542e03SKent Overstreet }; 465d1542e03SKent Overstreet 466d1542e03SKent Overstreet bch2_disk_reservation_put(c, &tmp); 467d1542e03SKent Overstreet res->disk.sectors -= disk_sectors; 468d1542e03SKent Overstreet return ret; 469d1542e03SKent Overstreet } 470d1542e03SKent Overstreet } 471d1542e03SKent Overstreet 472d1542e03SKent Overstreet return 0; 473f57a6a5dSKent Overstreet } 474f57a6a5dSKent Overstreet 4751c6fdbd8SKent Overstreet static void bch2_clear_page_bits(struct page *page) 4761c6fdbd8SKent Overstreet { 4771c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(page->mapping->host); 4781c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 479f57a6a5dSKent Overstreet struct bch_page_state *s = bch2_page_state(page); 480d1542e03SKent Overstreet struct disk_reservation disk_res = { 0 }; 481f57a6a5dSKent Overstreet int i, dirty_sectors = 0; 4821c6fdbd8SKent Overstreet 483f57a6a5dSKent Overstreet if (!s) 4841c6fdbd8SKent Overstreet return; 4851c6fdbd8SKent Overstreet 4863826ee0bSKent Overstreet EBUG_ON(!PageLocked(page)); 4873826ee0bSKent Overstreet EBUG_ON(PageWriteback(page)); 4883826ee0bSKent Overstreet 489f57a6a5dSKent Overstreet for (i = 0; i < ARRAY_SIZE(s->s); i++) { 490d1542e03SKent Overstreet disk_res.sectors += s->s[i].replicas_reserved; 491d1542e03SKent Overstreet s->s[i].replicas_reserved = 0; 492d1542e03SKent Overstreet 493b44a66a6SKent Overstreet switch (s->s[i].state) { 494b44a66a6SKent Overstreet case SECTOR_DIRTY: 495f57a6a5dSKent Overstreet s->s[i].state = SECTOR_UNALLOCATED; 496b44a66a6SKent Overstreet --dirty_sectors; 497b44a66a6SKent Overstreet break; 498b44a66a6SKent Overstreet case SECTOR_DIRTY_RESERVED: 499b44a66a6SKent Overstreet s->s[i].state = SECTOR_RESERVED; 500b44a66a6SKent Overstreet break; 501b44a66a6SKent Overstreet default: 502b44a66a6SKent Overstreet break; 503f57a6a5dSKent Overstreet } 504f57a6a5dSKent Overstreet } 505adfcfaf0SKent Overstreet 506d1542e03SKent Overstreet bch2_disk_reservation_put(c, &disk_res); 507d1542e03SKent Overstreet 508f57a6a5dSKent Overstreet if (dirty_sectors) 509b44a66a6SKent Overstreet i_sectors_acct(c, inode, NULL, dirty_sectors); 510adfcfaf0SKent Overstreet 511f57a6a5dSKent Overstreet bch2_page_state_release(page); 5121c6fdbd8SKent Overstreet } 5131c6fdbd8SKent Overstreet 514d1542e03SKent Overstreet static void bch2_set_page_dirty(struct bch_fs *c, 515d1542e03SKent Overstreet struct bch_inode_info *inode, struct page *page, 516d1542e03SKent Overstreet struct bch2_page_reservation *res, 517d1542e03SKent Overstreet unsigned offset, unsigned len) 5181c6fdbd8SKent Overstreet { 519d1542e03SKent Overstreet struct bch_page_state *s = bch2_page_state(page); 520f57a6a5dSKent Overstreet unsigned i, dirty_sectors = 0; 5211c6fdbd8SKent Overstreet 522877dfb34SKent Overstreet WARN_ON((u64) page_offset(page) + offset + len > 523877dfb34SKent Overstreet round_up((u64) i_size_read(&inode->v), block_bytes(c))); 524fb472ac5SKent Overstreet 5253826ee0bSKent Overstreet spin_lock(&s->lock); 5263826ee0bSKent Overstreet 5274b0a66d5SKent Overstreet for (i = round_down(offset, block_bytes(c)) >> 9; 5284b0a66d5SKent Overstreet i < round_up(offset + len, block_bytes(c)) >> 9; 529d1542e03SKent Overstreet i++) { 530d1542e03SKent Overstreet unsigned sectors = sectors_to_reserve(&s->s[i], 531d1542e03SKent Overstreet res->disk.nr_replicas); 5321c6fdbd8SKent Overstreet 533406d6d5aSKent Overstreet /* 534406d6d5aSKent Overstreet * This can happen if we race with the error path in 535406d6d5aSKent Overstreet * bch2_writepage_io_done(): 536406d6d5aSKent Overstreet */ 537406d6d5aSKent Overstreet sectors = min_t(unsigned, sectors, res->disk.sectors); 538406d6d5aSKent Overstreet 539d1542e03SKent Overstreet s->s[i].replicas_reserved += sectors; 540d1542e03SKent Overstreet res->disk.sectors -= sectors; 541adfcfaf0SKent Overstreet 542b44a66a6SKent Overstreet switch (s->s[i].state) { 543b44a66a6SKent Overstreet case SECTOR_UNALLOCATED: 544b44a66a6SKent Overstreet s->s[i].state = SECTOR_DIRTY; 545f57a6a5dSKent Overstreet dirty_sectors++; 546b44a66a6SKent Overstreet break; 547b44a66a6SKent Overstreet case SECTOR_RESERVED: 548b44a66a6SKent Overstreet s->s[i].state = SECTOR_DIRTY_RESERVED; 549b44a66a6SKent Overstreet break; 550b44a66a6SKent Overstreet default: 551b44a66a6SKent Overstreet break; 552b44a66a6SKent Overstreet } 553f57a6a5dSKent Overstreet } 554f57a6a5dSKent Overstreet 5553826ee0bSKent Overstreet spin_unlock(&s->lock); 5563826ee0bSKent Overstreet 557f57a6a5dSKent Overstreet if (dirty_sectors) 558d1542e03SKent Overstreet i_sectors_acct(c, inode, &res->quota, dirty_sectors); 5591c6fdbd8SKent Overstreet 560d1542e03SKent Overstreet if (!PageDirty(page)) 561d1542e03SKent Overstreet filemap_dirty_folio(inode->v.i_mapping, page_folio(page)); 5621c6fdbd8SKent Overstreet } 5631c6fdbd8SKent Overstreet 5641c6fdbd8SKent Overstreet vm_fault_t bch2_page_fault(struct vm_fault *vmf) 5651c6fdbd8SKent Overstreet { 5661c6fdbd8SKent Overstreet struct file *file = vmf->vma->vm_file; 567eb8e6e9cSKent Overstreet struct address_space *mapping = file->f_mapping; 568eb8e6e9cSKent Overstreet struct address_space *fdm = faults_disabled_mapping(); 5691c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 5701c6fdbd8SKent Overstreet int ret; 5711c6fdbd8SKent Overstreet 572eb8e6e9cSKent Overstreet if (fdm == mapping) 573eb8e6e9cSKent Overstreet return VM_FAULT_SIGBUS; 574eb8e6e9cSKent Overstreet 575eb8e6e9cSKent Overstreet /* Lock ordering: */ 576eb8e6e9cSKent Overstreet if (fdm > mapping) { 577eb8e6e9cSKent Overstreet struct bch_inode_info *fdm_host = to_bch_ei(fdm->host); 578eb8e6e9cSKent Overstreet 579eb8e6e9cSKent Overstreet if (bch2_pagecache_add_tryget(&inode->ei_pagecache_lock)) 580eb8e6e9cSKent Overstreet goto got_lock; 581eb8e6e9cSKent Overstreet 582eb8e6e9cSKent Overstreet bch2_pagecache_block_put(&fdm_host->ei_pagecache_lock); 583eb8e6e9cSKent Overstreet 5841c6fdbd8SKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 585eb8e6e9cSKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 586eb8e6e9cSKent Overstreet 587eb8e6e9cSKent Overstreet bch2_pagecache_block_get(&fdm_host->ei_pagecache_lock); 588eb8e6e9cSKent Overstreet 589eb8e6e9cSKent Overstreet /* Signal that lock has been dropped: */ 590eb8e6e9cSKent Overstreet set_fdm_dropped_locks(); 591eb8e6e9cSKent Overstreet return VM_FAULT_SIGBUS; 592eb8e6e9cSKent Overstreet } 593eb8e6e9cSKent Overstreet 594eb8e6e9cSKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 595eb8e6e9cSKent Overstreet got_lock: 5961c6fdbd8SKent Overstreet ret = filemap_fault(vmf); 5971c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 5981c6fdbd8SKent Overstreet 5991c6fdbd8SKent Overstreet return ret; 6001c6fdbd8SKent Overstreet } 6011c6fdbd8SKent Overstreet 6021c6fdbd8SKent Overstreet vm_fault_t bch2_page_mkwrite(struct vm_fault *vmf) 6031c6fdbd8SKent Overstreet { 6041c6fdbd8SKent Overstreet struct page *page = vmf->page; 6051c6fdbd8SKent Overstreet struct file *file = vmf->vma->vm_file; 6061c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 6071c6fdbd8SKent Overstreet struct address_space *mapping = file->f_mapping; 6081c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 609d1542e03SKent Overstreet struct bch2_page_reservation res; 6106cc3535dSKent Overstreet unsigned len; 6116cc3535dSKent Overstreet loff_t isize; 6121c6fdbd8SKent Overstreet int ret = VM_FAULT_LOCKED; 6131c6fdbd8SKent Overstreet 614d1542e03SKent Overstreet bch2_page_reservation_init(c, inode, &res); 615d1542e03SKent Overstreet 6161c6fdbd8SKent Overstreet sb_start_pagefault(inode->v.i_sb); 6171c6fdbd8SKent Overstreet file_update_time(file); 6181c6fdbd8SKent Overstreet 6191c6fdbd8SKent Overstreet /* 6201c6fdbd8SKent Overstreet * Not strictly necessary, but helps avoid dio writes livelocking in 6211c6fdbd8SKent Overstreet * write_invalidate_inode_pages_range() - can drop this if/when we get 6221c6fdbd8SKent Overstreet * a write_invalidate_inode_pages_range() that works without dropping 6231c6fdbd8SKent Overstreet * page lock before invalidating page 6241c6fdbd8SKent Overstreet */ 6251c6fdbd8SKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 6261c6fdbd8SKent Overstreet 6271c6fdbd8SKent Overstreet lock_page(page); 6286cc3535dSKent Overstreet isize = i_size_read(&inode->v); 6296cc3535dSKent Overstreet 6306cc3535dSKent Overstreet if (page->mapping != mapping || page_offset(page) >= isize) { 6311c6fdbd8SKent Overstreet unlock_page(page); 6321c6fdbd8SKent Overstreet ret = VM_FAULT_NOPAGE; 6331c6fdbd8SKent Overstreet goto out; 6341c6fdbd8SKent Overstreet } 6351c6fdbd8SKent Overstreet 636d55460bbSKent Overstreet len = min_t(loff_t, PAGE_SIZE, isize - page_offset(page)); 6376cc3535dSKent Overstreet 6386cc3535dSKent Overstreet if (bch2_page_reservation_get(c, inode, page, &res, 0, len, true)) { 6391c6fdbd8SKent Overstreet unlock_page(page); 6401c6fdbd8SKent Overstreet ret = VM_FAULT_SIGBUS; 6411c6fdbd8SKent Overstreet goto out; 6421c6fdbd8SKent Overstreet } 6431c6fdbd8SKent Overstreet 6446cc3535dSKent Overstreet bch2_set_page_dirty(c, inode, page, &res, 0, len); 6451b783a69SKent Overstreet bch2_page_reservation_put(c, inode, &res); 6461b783a69SKent Overstreet 6471c6fdbd8SKent Overstreet wait_for_stable_page(page); 6481c6fdbd8SKent Overstreet out: 6491c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 6501c6fdbd8SKent Overstreet sb_end_pagefault(inode->v.i_sb); 651d1542e03SKent Overstreet 6521c6fdbd8SKent Overstreet return ret; 6531c6fdbd8SKent Overstreet } 6541c6fdbd8SKent Overstreet 6551c6fdbd8SKent Overstreet void bch2_invalidate_folio(struct folio *folio, size_t offset, size_t length) 6561c6fdbd8SKent Overstreet { 6571c6fdbd8SKent Overstreet if (offset || length < folio_size(folio)) 6581c6fdbd8SKent Overstreet return; 6591c6fdbd8SKent Overstreet 6601c6fdbd8SKent Overstreet bch2_clear_page_bits(&folio->page); 6611c6fdbd8SKent Overstreet } 6621c6fdbd8SKent Overstreet 6631c6fdbd8SKent Overstreet bool bch2_release_folio(struct folio *folio, gfp_t gfp_mask) 6641c6fdbd8SKent Overstreet { 665a6d90385SKent Overstreet if (folio_test_dirty(folio) || folio_test_writeback(folio)) 6661c6fdbd8SKent Overstreet return false; 6671c6fdbd8SKent Overstreet 6681c6fdbd8SKent Overstreet bch2_clear_page_bits(&folio->page); 6691c6fdbd8SKent Overstreet return true; 6701c6fdbd8SKent Overstreet } 6711c6fdbd8SKent Overstreet 6721c6fdbd8SKent Overstreet /* readpage(s): */ 6731c6fdbd8SKent Overstreet 6741c6fdbd8SKent Overstreet static void bch2_readpages_end_io(struct bio *bio) 6751c6fdbd8SKent Overstreet { 6761c6fdbd8SKent Overstreet struct bvec_iter_all iter; 6771c6fdbd8SKent Overstreet struct bio_vec *bv; 6781c6fdbd8SKent Overstreet 6791c6fdbd8SKent Overstreet bio_for_each_segment_all(bv, bio, iter) { 6801c6fdbd8SKent Overstreet struct page *page = bv->bv_page; 6811c6fdbd8SKent Overstreet 6821c6fdbd8SKent Overstreet if (!bio->bi_status) { 6831c6fdbd8SKent Overstreet SetPageUptodate(page); 6841c6fdbd8SKent Overstreet } else { 6851c6fdbd8SKent Overstreet ClearPageUptodate(page); 6861c6fdbd8SKent Overstreet SetPageError(page); 6871c6fdbd8SKent Overstreet } 6881c6fdbd8SKent Overstreet unlock_page(page); 6891c6fdbd8SKent Overstreet } 6901c6fdbd8SKent Overstreet 6911c6fdbd8SKent Overstreet bio_put(bio); 6921c6fdbd8SKent Overstreet } 6931c6fdbd8SKent Overstreet 6941c6fdbd8SKent Overstreet struct readpages_iter { 6951c6fdbd8SKent Overstreet struct address_space *mapping; 6961c6fdbd8SKent Overstreet struct page **pages; 6971c6fdbd8SKent Overstreet unsigned nr_pages; 6981c6fdbd8SKent Overstreet unsigned idx; 6991c6fdbd8SKent Overstreet pgoff_t offset; 7001c6fdbd8SKent Overstreet }; 7011c6fdbd8SKent Overstreet 7021c6fdbd8SKent Overstreet static int readpages_iter_init(struct readpages_iter *iter, 7031c6fdbd8SKent Overstreet struct readahead_control *ractl) 7041c6fdbd8SKent Overstreet { 7051c6fdbd8SKent Overstreet unsigned i, nr_pages = readahead_count(ractl); 7061c6fdbd8SKent Overstreet 7071c6fdbd8SKent Overstreet memset(iter, 0, sizeof(*iter)); 7081c6fdbd8SKent Overstreet 7091c6fdbd8SKent Overstreet iter->mapping = ractl->mapping; 7101c6fdbd8SKent Overstreet iter->offset = readahead_index(ractl); 7111c6fdbd8SKent Overstreet iter->nr_pages = nr_pages; 7121c6fdbd8SKent Overstreet 7131c6fdbd8SKent Overstreet iter->pages = kmalloc_array(nr_pages, sizeof(struct page *), GFP_NOFS); 7141c6fdbd8SKent Overstreet if (!iter->pages) 7151c6fdbd8SKent Overstreet return -ENOMEM; 7161c6fdbd8SKent Overstreet 71789931472SKent Overstreet nr_pages = __readahead_batch(ractl, iter->pages, nr_pages); 7181c6fdbd8SKent Overstreet for (i = 0; i < nr_pages; i++) { 719f57a6a5dSKent Overstreet __bch2_page_state_create(iter->pages[i], __GFP_NOFAIL); 7201c6fdbd8SKent Overstreet put_page(iter->pages[i]); 7211c6fdbd8SKent Overstreet } 7221c6fdbd8SKent Overstreet 7231c6fdbd8SKent Overstreet return 0; 7241c6fdbd8SKent Overstreet } 7251c6fdbd8SKent Overstreet 7261c6fdbd8SKent Overstreet static inline struct page *readpage_iter_next(struct readpages_iter *iter) 7271c6fdbd8SKent Overstreet { 7281c6fdbd8SKent Overstreet if (iter->idx >= iter->nr_pages) 7291c6fdbd8SKent Overstreet return NULL; 7301c6fdbd8SKent Overstreet 7311c6fdbd8SKent Overstreet EBUG_ON(iter->pages[iter->idx]->index != iter->offset + iter->idx); 7321c6fdbd8SKent Overstreet 7331c6fdbd8SKent Overstreet return iter->pages[iter->idx]; 7341c6fdbd8SKent Overstreet } 7351c6fdbd8SKent Overstreet 73635189e09SKent Overstreet static bool extent_partial_reads_expensive(struct bkey_s_c k) 73735189e09SKent Overstreet { 73835189e09SKent Overstreet struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k); 73935189e09SKent Overstreet struct bch_extent_crc_unpacked crc; 74035189e09SKent Overstreet const union bch_extent_entry *i; 74135189e09SKent Overstreet 74235189e09SKent Overstreet bkey_for_each_crc(k.k, ptrs, crc, i) 74335189e09SKent Overstreet if (crc.csum_type || crc.compression_type) 74435189e09SKent Overstreet return true; 74535189e09SKent Overstreet return false; 74635189e09SKent Overstreet } 74735189e09SKent Overstreet 7481c6fdbd8SKent Overstreet static void readpage_bio_extend(struct readpages_iter *iter, 74976426098SKent Overstreet struct bio *bio, 75076426098SKent Overstreet unsigned sectors_this_extent, 7511c6fdbd8SKent Overstreet bool get_more) 7521c6fdbd8SKent Overstreet { 75376426098SKent Overstreet while (bio_sectors(bio) < sectors_this_extent && 7541c6fdbd8SKent Overstreet bio->bi_vcnt < bio->bi_max_vecs) { 755*7279c1a2SKent Overstreet pgoff_t page_offset = bio_end_sector(bio) >> PAGE_SECTORS_SHIFT; 7561c6fdbd8SKent Overstreet struct page *page = readpage_iter_next(iter); 7571c6fdbd8SKent Overstreet int ret; 7581c6fdbd8SKent Overstreet 7591c6fdbd8SKent Overstreet if (page) { 7601c6fdbd8SKent Overstreet if (iter->offset + iter->idx != page_offset) 7611c6fdbd8SKent Overstreet break; 7621c6fdbd8SKent Overstreet 7631c6fdbd8SKent Overstreet iter->idx++; 7641c6fdbd8SKent Overstreet } else { 7651c6fdbd8SKent Overstreet if (!get_more) 7661c6fdbd8SKent Overstreet break; 7671c6fdbd8SKent Overstreet 7681c6fdbd8SKent Overstreet page = xa_load(&iter->mapping->i_pages, page_offset); 7691c6fdbd8SKent Overstreet if (page && !xa_is_value(page)) 7701c6fdbd8SKent Overstreet break; 7711c6fdbd8SKent Overstreet 7721c6fdbd8SKent Overstreet page = __page_cache_alloc(readahead_gfp_mask(iter->mapping)); 7731c6fdbd8SKent Overstreet if (!page) 7741c6fdbd8SKent Overstreet break; 7751c6fdbd8SKent Overstreet 776f57a6a5dSKent Overstreet if (!__bch2_page_state_create(page, 0)) { 777f57a6a5dSKent Overstreet put_page(page); 778f57a6a5dSKent Overstreet break; 779f57a6a5dSKent Overstreet } 7801c6fdbd8SKent Overstreet 7811c6fdbd8SKent Overstreet ret = add_to_page_cache_lru(page, iter->mapping, 7821c6fdbd8SKent Overstreet page_offset, GFP_NOFS); 7831c6fdbd8SKent Overstreet if (ret) { 784f57a6a5dSKent Overstreet __bch2_page_state_release(page); 7851c6fdbd8SKent Overstreet put_page(page); 7861c6fdbd8SKent Overstreet break; 7871c6fdbd8SKent Overstreet } 7881c6fdbd8SKent Overstreet 7891c6fdbd8SKent Overstreet put_page(page); 7901c6fdbd8SKent Overstreet } 7911c6fdbd8SKent Overstreet 792885678f6SKent Overstreet BUG_ON(!bio_add_page(bio, page, PAGE_SIZE, 0)); 7931c6fdbd8SKent Overstreet } 7941c6fdbd8SKent Overstreet } 7951c6fdbd8SKent Overstreet 7968c6d298aSKent Overstreet static void bchfs_read(struct btree_trans *trans, 7978c6d298aSKent Overstreet struct bch_read_bio *rbio, 7988c6d298aSKent Overstreet subvol_inum inum, 7991c6fdbd8SKent Overstreet struct readpages_iter *readpages_iter) 8001c6fdbd8SKent Overstreet { 8010f238367SKent Overstreet struct bch_fs *c = trans->c; 8028c6d298aSKent Overstreet struct btree_iter iter; 80307a1006aSKent Overstreet struct bkey_buf sk; 8041c6fdbd8SKent Overstreet int flags = BCH_READ_RETRY_IF_STALE| 8051c6fdbd8SKent Overstreet BCH_READ_MAY_PROMOTE; 8068c6d298aSKent Overstreet u32 snapshot; 80776426098SKent Overstreet int ret = 0; 8081c6fdbd8SKent Overstreet 8091c6fdbd8SKent Overstreet rbio->c = c; 8101c6fdbd8SKent Overstreet rbio->start_time = local_clock(); 8118c6d298aSKent Overstreet rbio->subvol = inum.subvol; 81235189e09SKent Overstreet 81307a1006aSKent Overstreet bch2_bkey_buf_init(&sk); 81476426098SKent Overstreet retry: 815700c25b3SKent Overstreet bch2_trans_begin(trans); 8168c6d298aSKent Overstreet iter = (struct btree_iter) { NULL }; 817700c25b3SKent Overstreet 8188c6d298aSKent Overstreet ret = bch2_subvolume_get_snapshot(trans, inum.subvol, &snapshot); 8198c6d298aSKent Overstreet if (ret) 8208c6d298aSKent Overstreet goto err; 8218c6d298aSKent Overstreet 8228c6d298aSKent Overstreet bch2_trans_iter_init(trans, &iter, BTREE_ID_extents, 8238c6d298aSKent Overstreet SPOS(inum.inum, rbio->bio.bi_iter.bi_sector, snapshot), 8248c6d298aSKent Overstreet BTREE_ITER_SLOTS|BTREE_ITER_FILTER_SNAPSHOTS); 8251c6fdbd8SKent Overstreet while (1) { 8261c6fdbd8SKent Overstreet struct bkey_s_c k; 82776426098SKent Overstreet unsigned bytes, sectors, offset_into_extent; 8285ff75ccbSKent Overstreet enum btree_id data_btree = BTREE_ID_extents; 8291c6fdbd8SKent Overstreet 8303737e0ddSKent Overstreet /* 8313737e0ddSKent Overstreet * read_extent -> io_time_reset may cause a transaction restart 8323737e0ddSKent Overstreet * without returning an error, we need to check for that here: 8333737e0ddSKent Overstreet */ 8343737e0ddSKent Overstreet if (!bch2_trans_relock(trans)) { 8353737e0ddSKent Overstreet ret = -EINTR; 8363737e0ddSKent Overstreet break; 8373737e0ddSKent Overstreet } 8383737e0ddSKent Overstreet 8398c6d298aSKent Overstreet bch2_btree_iter_set_pos(&iter, 8408c6d298aSKent Overstreet POS(inum.inum, rbio->bio.bi_iter.bi_sector)); 8411c6fdbd8SKent Overstreet 8428c6d298aSKent Overstreet k = bch2_btree_iter_peek_slot(&iter); 84376426098SKent Overstreet ret = bkey_err(k); 84476426098SKent Overstreet if (ret) 84576426098SKent Overstreet break; 8461c6fdbd8SKent Overstreet 8478c6d298aSKent Overstreet offset_into_extent = iter.pos.offset - 84806ed8558SKent Overstreet bkey_start_offset(k.k); 84976426098SKent Overstreet sectors = k.k->size - offset_into_extent; 85076426098SKent Overstreet 85107a1006aSKent Overstreet bch2_bkey_buf_reassemble(&sk, c, k); 85213dcd4abSKent Overstreet 8535ff75ccbSKent Overstreet ret = bch2_read_indirect_extent(trans, &data_btree, 85422d8a33dSYuxuan Shui &offset_into_extent, &sk); 85576426098SKent Overstreet if (ret) 85676426098SKent Overstreet break; 85776426098SKent Overstreet 85813dcd4abSKent Overstreet k = bkey_i_to_s_c(sk.k); 85913dcd4abSKent Overstreet 86076426098SKent Overstreet sectors = min(sectors, k.k->size - offset_into_extent); 86176426098SKent Overstreet 86276426098SKent Overstreet bch2_trans_unlock(trans); 86306ed8558SKent Overstreet 86435189e09SKent Overstreet if (readpages_iter) 86535189e09SKent Overstreet readpage_bio_extend(readpages_iter, &rbio->bio, sectors, 86635189e09SKent Overstreet extent_partial_reads_expensive(k)); 8671c6fdbd8SKent Overstreet 86876426098SKent Overstreet bytes = min(sectors, bio_sectors(&rbio->bio)) << 9; 86906ed8558SKent Overstreet swap(rbio->bio.bi_iter.bi_size, bytes); 8701c6fdbd8SKent Overstreet 87106ed8558SKent Overstreet if (rbio->bio.bi_iter.bi_size == bytes) 8721c6fdbd8SKent Overstreet flags |= BCH_READ_LAST_FRAGMENT; 8731c6fdbd8SKent Overstreet 874b44a66a6SKent Overstreet bch2_bio_page_state_set(&rbio->bio, k); 8751c6fdbd8SKent Overstreet 8768c6d298aSKent Overstreet bch2_read_extent(trans, rbio, iter.pos, 8775ff75ccbSKent Overstreet data_btree, k, offset_into_extent, flags); 8781c6fdbd8SKent Overstreet 8791c6fdbd8SKent Overstreet if (flags & BCH_READ_LAST_FRAGMENT) 88035189e09SKent Overstreet break; 8811c6fdbd8SKent Overstreet 88206ed8558SKent Overstreet swap(rbio->bio.bi_iter.bi_size, bytes); 88306ed8558SKent Overstreet bio_advance(&rbio->bio, bytes); 884084d42bbSKent Overstreet 885084d42bbSKent Overstreet ret = btree_trans_too_many_iters(trans); 886084d42bbSKent Overstreet if (ret) 887084d42bbSKent Overstreet break; 8881c6fdbd8SKent Overstreet } 8898c6d298aSKent Overstreet err: 8908c6d298aSKent Overstreet bch2_trans_iter_exit(trans, &iter); 89176426098SKent Overstreet 89276426098SKent Overstreet if (ret == -EINTR) 89376426098SKent Overstreet goto retry; 89476426098SKent Overstreet 89535189e09SKent Overstreet if (ret) { 8968c6d298aSKent Overstreet bch_err_inum_ratelimited(c, inum.inum, 8970fefe8d8SKent Overstreet "read error %i from btree lookup", ret); 8980fefe8d8SKent Overstreet rbio->bio.bi_status = BLK_STS_IOERR; 89976426098SKent Overstreet bio_endio(&rbio->bio); 9001c6fdbd8SKent Overstreet } 9011c6fdbd8SKent Overstreet 90207a1006aSKent Overstreet bch2_bkey_buf_exit(&sk, c); 90335189e09SKent Overstreet } 90435189e09SKent Overstreet 9051c6fdbd8SKent Overstreet void bch2_readahead(struct readahead_control *ractl) 9061c6fdbd8SKent Overstreet { 9071c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(ractl->mapping->host); 9081c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 9099a3df993SKent Overstreet struct bch_io_opts opts = io_opts(c, &inode->ei_inode); 910424eb881SKent Overstreet struct btree_trans trans; 9111c6fdbd8SKent Overstreet struct page *page; 9121c6fdbd8SKent Overstreet struct readpages_iter readpages_iter; 9131c6fdbd8SKent Overstreet int ret; 9141c6fdbd8SKent Overstreet 9151c6fdbd8SKent Overstreet ret = readpages_iter_init(&readpages_iter, ractl); 9161c6fdbd8SKent Overstreet BUG_ON(ret); 9171c6fdbd8SKent Overstreet 91820bceecbSKent Overstreet bch2_trans_init(&trans, c, 0, 0); 9191c6fdbd8SKent Overstreet 9201c6fdbd8SKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 9211c6fdbd8SKent Overstreet 9221c6fdbd8SKent Overstreet while ((page = readpage_iter_next(&readpages_iter))) { 9231c6fdbd8SKent Overstreet pgoff_t index = readpages_iter.offset + readpages_iter.idx; 9241c6fdbd8SKent Overstreet unsigned n = min_t(unsigned, 9251c6fdbd8SKent Overstreet readpages_iter.nr_pages - 9261c6fdbd8SKent Overstreet readpages_iter.idx, 9271c6fdbd8SKent Overstreet BIO_MAX_VECS); 9281c6fdbd8SKent Overstreet struct bch_read_bio *rbio = 9291c6fdbd8SKent Overstreet rbio_init(bio_alloc_bioset(NULL, n, REQ_OP_READ, 9301c6fdbd8SKent Overstreet GFP_NOFS, &c->bio_read), 9311c6fdbd8SKent Overstreet opts); 9321c6fdbd8SKent Overstreet 9331c6fdbd8SKent Overstreet readpages_iter.idx++; 9341c6fdbd8SKent Overstreet 935*7279c1a2SKent Overstreet rbio->bio.bi_iter.bi_sector = (sector_t) index << PAGE_SECTORS_SHIFT; 9361c6fdbd8SKent Overstreet rbio->bio.bi_end_io = bch2_readpages_end_io; 937885678f6SKent Overstreet BUG_ON(!bio_add_page(&rbio->bio, page, PAGE_SIZE, 0)); 9381c6fdbd8SKent Overstreet 9398c6d298aSKent Overstreet bchfs_read(&trans, rbio, inode_inum(inode), 9400f238367SKent Overstreet &readpages_iter); 9411c6fdbd8SKent Overstreet } 9421c6fdbd8SKent Overstreet 9431c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 944424eb881SKent Overstreet 945424eb881SKent Overstreet bch2_trans_exit(&trans); 9461c6fdbd8SKent Overstreet kfree(readpages_iter.pages); 9471c6fdbd8SKent Overstreet } 9481c6fdbd8SKent Overstreet 9491c6fdbd8SKent Overstreet static void __bchfs_readpage(struct bch_fs *c, struct bch_read_bio *rbio, 9508c6d298aSKent Overstreet subvol_inum inum, struct page *page) 9511c6fdbd8SKent Overstreet { 952424eb881SKent Overstreet struct btree_trans trans; 9531c6fdbd8SKent Overstreet 954f57a6a5dSKent Overstreet bch2_page_state_create(page, __GFP_NOFAIL); 9551c6fdbd8SKent Overstreet 9561c6fdbd8SKent Overstreet rbio->bio.bi_opf = REQ_OP_READ|REQ_SYNC; 9577f5e31e1SKent Overstreet rbio->bio.bi_iter.bi_sector = 958*7279c1a2SKent Overstreet (sector_t) page->index << PAGE_SECTORS_SHIFT; 9597f5e31e1SKent Overstreet BUG_ON(!bio_add_page(&rbio->bio, page, PAGE_SIZE, 0)); 9601c6fdbd8SKent Overstreet 96120bceecbSKent Overstreet bch2_trans_init(&trans, c, 0, 0); 9628c6d298aSKent Overstreet bchfs_read(&trans, rbio, inum, NULL); 963424eb881SKent Overstreet bch2_trans_exit(&trans); 9641c6fdbd8SKent Overstreet } 9651c6fdbd8SKent Overstreet 9661c6fdbd8SKent Overstreet static void bch2_read_single_page_end_io(struct bio *bio) 9671c6fdbd8SKent Overstreet { 9681c6fdbd8SKent Overstreet complete(bio->bi_private); 9691c6fdbd8SKent Overstreet } 9701c6fdbd8SKent Overstreet 9711c6fdbd8SKent Overstreet static int bch2_read_single_page(struct page *page, 9721c6fdbd8SKent Overstreet struct address_space *mapping) 9731c6fdbd8SKent Overstreet { 9741c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(mapping->host); 9751c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 9761c6fdbd8SKent Overstreet struct bch_read_bio *rbio; 9771c6fdbd8SKent Overstreet int ret; 9781c6fdbd8SKent Overstreet DECLARE_COMPLETION_ONSTACK(done); 9791c6fdbd8SKent Overstreet 9801c6fdbd8SKent Overstreet rbio = rbio_init(bio_alloc_bioset(NULL, 1, REQ_OP_READ, GFP_NOFS, &c->bio_read), 9819a3df993SKent Overstreet io_opts(c, &inode->ei_inode)); 9821c6fdbd8SKent Overstreet rbio->bio.bi_private = &done; 9831c6fdbd8SKent Overstreet rbio->bio.bi_end_io = bch2_read_single_page_end_io; 9841c6fdbd8SKent Overstreet 9858c6d298aSKent Overstreet __bchfs_readpage(c, rbio, inode_inum(inode), page); 9861c6fdbd8SKent Overstreet wait_for_completion(&done); 9871c6fdbd8SKent Overstreet 9881c6fdbd8SKent Overstreet ret = blk_status_to_errno(rbio->bio.bi_status); 9891c6fdbd8SKent Overstreet bio_put(&rbio->bio); 9901c6fdbd8SKent Overstreet 9911c6fdbd8SKent Overstreet if (ret < 0) 9921c6fdbd8SKent Overstreet return ret; 9931c6fdbd8SKent Overstreet 9941c6fdbd8SKent Overstreet SetPageUptodate(page); 9951c6fdbd8SKent Overstreet return 0; 9961c6fdbd8SKent Overstreet } 9971c6fdbd8SKent Overstreet 9981c6fdbd8SKent Overstreet int bch2_read_folio(struct file *file, struct folio *folio) 9991c6fdbd8SKent Overstreet { 10001c6fdbd8SKent Overstreet struct page *page = &folio->page; 10011c6fdbd8SKent Overstreet int ret; 10021c6fdbd8SKent Overstreet 10031c6fdbd8SKent Overstreet ret = bch2_read_single_page(page, page->mapping); 10041c6fdbd8SKent Overstreet folio_unlock(folio); 10051c6fdbd8SKent Overstreet return ret; 10061c6fdbd8SKent Overstreet } 10071c6fdbd8SKent Overstreet 10081c6fdbd8SKent Overstreet /* writepages: */ 10091c6fdbd8SKent Overstreet 10101c6fdbd8SKent Overstreet struct bch_writepage_state { 10111c6fdbd8SKent Overstreet struct bch_writepage_io *io; 10121c6fdbd8SKent Overstreet struct bch_io_opts opts; 10131c6fdbd8SKent Overstreet }; 10141c6fdbd8SKent Overstreet 10151c6fdbd8SKent Overstreet static inline struct bch_writepage_state bch_writepage_state_init(struct bch_fs *c, 10161c6fdbd8SKent Overstreet struct bch_inode_info *inode) 10171c6fdbd8SKent Overstreet { 10189a3df993SKent Overstreet return (struct bch_writepage_state) { 10199a3df993SKent Overstreet .opts = io_opts(c, &inode->ei_inode) 10209a3df993SKent Overstreet }; 10211c6fdbd8SKent Overstreet } 10221c6fdbd8SKent Overstreet 10239f311f21SKent Overstreet static void bch2_writepage_io_done(struct bch_write_op *op) 10241c6fdbd8SKent Overstreet { 10259f311f21SKent Overstreet struct bch_writepage_io *io = 10269f311f21SKent Overstreet container_of(op, struct bch_writepage_io, op); 10279a3df993SKent Overstreet struct bch_fs *c = io->op.c; 10289a3df993SKent Overstreet struct bio *bio = &io->op.wbio.bio; 10291c6fdbd8SKent Overstreet struct bvec_iter_all iter; 10301c6fdbd8SKent Overstreet struct bio_vec *bvec; 1031b3fce09cSKent Overstreet unsigned i; 10321c6fdbd8SKent Overstreet 1033ef1b2092SKent Overstreet up(&io->op.c->io_in_flight); 1034ef1b2092SKent Overstreet 10359a3df993SKent Overstreet if (io->op.error) { 103633c74e41SKent Overstreet set_bit(EI_INODE_ERROR, &io->inode->ei_flags); 103733c74e41SKent Overstreet 103875812e70SKent Overstreet bio_for_each_segment_all(bvec, bio, iter) { 1039b3fce09cSKent Overstreet struct bch_page_state *s; 1040b3fce09cSKent Overstreet 10411c6fdbd8SKent Overstreet SetPageError(bvec->bv_page); 104275812e70SKent Overstreet mapping_set_error(bvec->bv_page->mapping, -EIO); 1043b3fce09cSKent Overstreet 10443826ee0bSKent Overstreet s = __bch2_page_state(bvec->bv_page); 10453826ee0bSKent Overstreet spin_lock(&s->lock); 1046b3fce09cSKent Overstreet for (i = 0; i < PAGE_SECTORS; i++) 1047b3fce09cSKent Overstreet s->s[i].nr_replicas = 0; 10483826ee0bSKent Overstreet spin_unlock(&s->lock); 104975812e70SKent Overstreet } 10501c6fdbd8SKent Overstreet } 10511c6fdbd8SKent Overstreet 10524be1a412SKent Overstreet if (io->op.flags & BCH_WRITE_WROTE_DATA_INLINE) { 10534be1a412SKent Overstreet bio_for_each_segment_all(bvec, bio, iter) { 10544be1a412SKent Overstreet struct bch_page_state *s; 10554be1a412SKent Overstreet 10564be1a412SKent Overstreet s = __bch2_page_state(bvec->bv_page); 10574be1a412SKent Overstreet spin_lock(&s->lock); 10584be1a412SKent Overstreet for (i = 0; i < PAGE_SECTORS; i++) 10594be1a412SKent Overstreet s->s[i].nr_replicas = 0; 10604be1a412SKent Overstreet spin_unlock(&s->lock); 10614be1a412SKent Overstreet } 10624be1a412SKent Overstreet } 10634be1a412SKent Overstreet 10641c6fdbd8SKent Overstreet /* 10651c6fdbd8SKent Overstreet * racing with fallocate can cause us to add fewer sectors than 10661c6fdbd8SKent Overstreet * expected - but we shouldn't add more sectors than expected: 10671c6fdbd8SKent Overstreet */ 10689a3df993SKent Overstreet BUG_ON(io->op.i_sectors_delta > 0); 10691c6fdbd8SKent Overstreet 10701c6fdbd8SKent Overstreet /* 10711c6fdbd8SKent Overstreet * (error (due to going RO) halfway through a page can screw that up 10721c6fdbd8SKent Overstreet * slightly) 10731c6fdbd8SKent Overstreet * XXX wtf? 10749a3df993SKent Overstreet BUG_ON(io->op.op.i_sectors_delta >= PAGE_SECTORS); 10751c6fdbd8SKent Overstreet */ 10761c6fdbd8SKent Overstreet 10771c6fdbd8SKent Overstreet /* 10781c6fdbd8SKent Overstreet * PageWriteback is effectively our ref on the inode - fixup i_blocks 10791c6fdbd8SKent Overstreet * before calling end_page_writeback: 10801c6fdbd8SKent Overstreet */ 10819a3df993SKent Overstreet i_sectors_acct(c, io->inode, NULL, io->op.i_sectors_delta); 10821c6fdbd8SKent Overstreet 10837f5e31e1SKent Overstreet bio_for_each_segment_all(bvec, bio, iter) { 10847f5e31e1SKent Overstreet struct bch_page_state *s = __bch2_page_state(bvec->bv_page); 10857f5e31e1SKent Overstreet 10867f5e31e1SKent Overstreet if (atomic_dec_and_test(&s->write_count)) 10871c6fdbd8SKent Overstreet end_page_writeback(bvec->bv_page); 10887f5e31e1SKent Overstreet } 10891c6fdbd8SKent Overstreet 10909f311f21SKent Overstreet bio_put(&io->op.wbio.bio); 10911c6fdbd8SKent Overstreet } 10921c6fdbd8SKent Overstreet 10931c6fdbd8SKent Overstreet static void bch2_writepage_do_io(struct bch_writepage_state *w) 10941c6fdbd8SKent Overstreet { 10951c6fdbd8SKent Overstreet struct bch_writepage_io *io = w->io; 10961c6fdbd8SKent Overstreet 1097ef1b2092SKent Overstreet down(&io->op.c->io_in_flight); 1098ef1b2092SKent Overstreet 10991c6fdbd8SKent Overstreet w->io = NULL; 11009f311f21SKent Overstreet closure_call(&io->op.cl, bch2_write, NULL, NULL); 11011c6fdbd8SKent Overstreet } 11021c6fdbd8SKent Overstreet 11031c6fdbd8SKent Overstreet /* 11041c6fdbd8SKent Overstreet * Get a bch_writepage_io and add @page to it - appending to an existing one if 11051c6fdbd8SKent Overstreet * possible, else allocating a new one: 11061c6fdbd8SKent Overstreet */ 11071c6fdbd8SKent Overstreet static void bch2_writepage_io_alloc(struct bch_fs *c, 110850fe5bd6SKent Overstreet struct writeback_control *wbc, 11091c6fdbd8SKent Overstreet struct bch_writepage_state *w, 11101c6fdbd8SKent Overstreet struct bch_inode_info *inode, 11117f5e31e1SKent Overstreet u64 sector, 11121c6fdbd8SKent Overstreet unsigned nr_replicas) 11131c6fdbd8SKent Overstreet { 11141c6fdbd8SKent Overstreet struct bch_write_op *op; 11151c6fdbd8SKent Overstreet 11161c6fdbd8SKent Overstreet w->io = container_of(bio_alloc_bioset(NULL, BIO_MAX_VECS, 11171c6fdbd8SKent Overstreet REQ_OP_WRITE, 11181c6fdbd8SKent Overstreet GFP_NOFS, 11191c6fdbd8SKent Overstreet &c->writepage_bioset), 11209a3df993SKent Overstreet struct bch_writepage_io, op.wbio.bio); 11211c6fdbd8SKent Overstreet 11229a3df993SKent Overstreet w->io->inode = inode; 11239a3df993SKent Overstreet op = &w->io->op; 11249a3df993SKent Overstreet bch2_write_op_init(op, c, w->opts); 11259a3df993SKent Overstreet op->target = w->opts.foreground_target; 11261c6fdbd8SKent Overstreet op->nr_replicas = nr_replicas; 11271c6fdbd8SKent Overstreet op->res.nr_replicas = nr_replicas; 11281c6fdbd8SKent Overstreet op->write_point = writepoint_hashed(inode->ei_last_dirtied); 11298c6d298aSKent Overstreet op->subvol = inode->ei_subvol; 11307f5e31e1SKent Overstreet op->pos = POS(inode->v.i_ino, sector); 11319f311f21SKent Overstreet op->end_io = bch2_writepage_io_done; 11327f5e31e1SKent Overstreet op->wbio.bio.bi_iter.bi_sector = sector; 113350fe5bd6SKent Overstreet op->wbio.bio.bi_opf = wbc_to_write_flags(wbc); 11341c6fdbd8SKent Overstreet } 11351c6fdbd8SKent Overstreet 11361c6fdbd8SKent Overstreet static int __bch2_writepage(struct folio *folio, 11371c6fdbd8SKent Overstreet struct writeback_control *wbc, 11381c6fdbd8SKent Overstreet void *data) 11391c6fdbd8SKent Overstreet { 11401c6fdbd8SKent Overstreet struct page *page = &folio->page; 11411c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(page->mapping->host); 11421c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 11431c6fdbd8SKent Overstreet struct bch_writepage_state *w = data; 11447f5e31e1SKent Overstreet struct bch_page_state *s, orig; 11457f5e31e1SKent Overstreet unsigned i, offset, nr_replicas_this_write = U32_MAX; 11461c6fdbd8SKent Overstreet loff_t i_size = i_size_read(&inode->v); 11471c6fdbd8SKent Overstreet pgoff_t end_index = i_size >> PAGE_SHIFT; 1148e1036a2aSKent Overstreet int ret; 11491c6fdbd8SKent Overstreet 11501c6fdbd8SKent Overstreet EBUG_ON(!PageUptodate(page)); 11511c6fdbd8SKent Overstreet 11521c6fdbd8SKent Overstreet /* Is the page fully inside i_size? */ 11531c6fdbd8SKent Overstreet if (page->index < end_index) 11541c6fdbd8SKent Overstreet goto do_io; 11551c6fdbd8SKent Overstreet 11561c6fdbd8SKent Overstreet /* Is the page fully outside i_size? (truncate in progress) */ 11571c6fdbd8SKent Overstreet offset = i_size & (PAGE_SIZE - 1); 11581c6fdbd8SKent Overstreet if (page->index > end_index || !offset) { 11591c6fdbd8SKent Overstreet unlock_page(page); 11601c6fdbd8SKent Overstreet return 0; 11611c6fdbd8SKent Overstreet } 11621c6fdbd8SKent Overstreet 11631c6fdbd8SKent Overstreet /* 11641c6fdbd8SKent Overstreet * The page straddles i_size. It must be zeroed out on each and every 11651c6fdbd8SKent Overstreet * writepage invocation because it may be mmapped. "A file is mapped 11661c6fdbd8SKent Overstreet * in multiples of the page size. For a file that is not a multiple of 11671c6fdbd8SKent Overstreet * the page size, the remaining memory is zeroed when mapped, and 11681c6fdbd8SKent Overstreet * writes to that region are not written out to the file." 11691c6fdbd8SKent Overstreet */ 11701c6fdbd8SKent Overstreet zero_user_segment(page, offset, PAGE_SIZE); 11711c6fdbd8SKent Overstreet do_io: 1172f57a6a5dSKent Overstreet s = bch2_page_state_create(page, __GFP_NOFAIL); 1173f81b648dSKent Overstreet 1174f74a5051SKent Overstreet /* 1175f74a5051SKent Overstreet * Things get really hairy with errors during writeback: 1176f74a5051SKent Overstreet */ 1177f74a5051SKent Overstreet ret = bch2_get_page_disk_reservation(c, inode, page, false); 1178f74a5051SKent Overstreet BUG_ON(ret); 1179e1036a2aSKent Overstreet 11807f5e31e1SKent Overstreet /* Before unlocking the page, get copy of reservations: */ 1181f74a5051SKent Overstreet spin_lock(&s->lock); 11827f5e31e1SKent Overstreet orig = *s; 1183f74a5051SKent Overstreet spin_unlock(&s->lock); 11847f5e31e1SKent Overstreet 11857f5e31e1SKent Overstreet for (i = 0; i < PAGE_SECTORS; i++) { 11862ba5d38bSKent Overstreet if (s->s[i].state < SECTOR_DIRTY) 11877f5e31e1SKent Overstreet continue; 11887f5e31e1SKent Overstreet 1189f81b648dSKent Overstreet nr_replicas_this_write = 1190f57a6a5dSKent Overstreet min_t(unsigned, nr_replicas_this_write, 1191f57a6a5dSKent Overstreet s->s[i].nr_replicas + 1192f57a6a5dSKent Overstreet s->s[i].replicas_reserved); 11937f5e31e1SKent Overstreet } 11941c6fdbd8SKent Overstreet 1195f57a6a5dSKent Overstreet for (i = 0; i < PAGE_SECTORS; i++) { 11962ba5d38bSKent Overstreet if (s->s[i].state < SECTOR_DIRTY) 11977f5e31e1SKent Overstreet continue; 11987f5e31e1SKent Overstreet 1199f57a6a5dSKent Overstreet s->s[i].nr_replicas = w->opts.compression 1200f57a6a5dSKent Overstreet ? 0 : nr_replicas_this_write; 1201e1036a2aSKent Overstreet 1202f57a6a5dSKent Overstreet s->s[i].replicas_reserved = 0; 1203f57a6a5dSKent Overstreet s->s[i].state = SECTOR_ALLOCATED; 1204f57a6a5dSKent Overstreet } 12051c6fdbd8SKent Overstreet 12067f5e31e1SKent Overstreet BUG_ON(atomic_read(&s->write_count)); 12077f5e31e1SKent Overstreet atomic_set(&s->write_count, 1); 12087f5e31e1SKent Overstreet 12091c6fdbd8SKent Overstreet BUG_ON(PageWriteback(page)); 12101c6fdbd8SKent Overstreet set_page_writeback(page); 12117f5e31e1SKent Overstreet 12121c6fdbd8SKent Overstreet unlock_page(page); 12131c6fdbd8SKent Overstreet 12147f5e31e1SKent Overstreet offset = 0; 12157f5e31e1SKent Overstreet while (1) { 1216f74a5051SKent Overstreet unsigned sectors = 0, dirty_sectors = 0, reserved_sectors = 0; 12177f5e31e1SKent Overstreet u64 sector; 12187f5e31e1SKent Overstreet 12197f5e31e1SKent Overstreet while (offset < PAGE_SECTORS && 12202ba5d38bSKent Overstreet orig.s[offset].state < SECTOR_DIRTY) 12217f5e31e1SKent Overstreet offset++; 12227f5e31e1SKent Overstreet 12237f5e31e1SKent Overstreet if (offset == PAGE_SECTORS) 12247f5e31e1SKent Overstreet break; 12257f5e31e1SKent Overstreet 12267f5e31e1SKent Overstreet while (offset + sectors < PAGE_SECTORS && 1227f74a5051SKent Overstreet orig.s[offset + sectors].state >= SECTOR_DIRTY) { 1228f74a5051SKent Overstreet reserved_sectors += orig.s[offset + sectors].replicas_reserved; 1229f74a5051SKent Overstreet dirty_sectors += orig.s[offset + sectors].state == SECTOR_DIRTY; 12307f5e31e1SKent Overstreet sectors++; 12317f5e31e1SKent Overstreet } 1232f74a5051SKent Overstreet BUG_ON(!sectors); 1233f74a5051SKent Overstreet 1234*7279c1a2SKent Overstreet sector = ((u64) page->index << PAGE_SECTORS_SHIFT) + offset; 12357f5e31e1SKent Overstreet 12361c6fdbd8SKent Overstreet if (w->io && 12379a3df993SKent Overstreet (w->io->op.res.nr_replicas != nr_replicas_this_write || 12389a3df993SKent Overstreet bio_full(&w->io->op.wbio.bio, PAGE_SIZE) || 1239f59b3464SKent Overstreet w->io->op.wbio.bio.bi_iter.bi_size + (sectors << 9) >= 1240f59b3464SKent Overstreet (BIO_MAX_VECS * PAGE_SIZE) || 12419a3df993SKent Overstreet bio_end_sector(&w->io->op.wbio.bio) != sector)) 12421c6fdbd8SKent Overstreet bch2_writepage_do_io(w); 12431c6fdbd8SKent Overstreet 12441c6fdbd8SKent Overstreet if (!w->io) 124550fe5bd6SKent Overstreet bch2_writepage_io_alloc(c, wbc, w, inode, sector, 1246f81b648dSKent Overstreet nr_replicas_this_write); 12471c6fdbd8SKent Overstreet 12487f5e31e1SKent Overstreet atomic_inc(&s->write_count); 12497f5e31e1SKent Overstreet 12509a3df993SKent Overstreet BUG_ON(inode != w->io->inode); 12519a3df993SKent Overstreet BUG_ON(!bio_add_page(&w->io->op.wbio.bio, page, 12527f5e31e1SKent Overstreet sectors << 9, offset << 9)); 12531c6fdbd8SKent Overstreet 12546cc3535dSKent Overstreet /* Check for writing past i_size: */ 12559a3df993SKent Overstreet WARN_ON((bio_end_sector(&w->io->op.wbio.bio) << 9) > 12566cc3535dSKent Overstreet round_up(i_size, block_bytes(c))); 12576cc3535dSKent Overstreet 12589a3df993SKent Overstreet w->io->op.res.sectors += reserved_sectors; 12599a3df993SKent Overstreet w->io->op.i_sectors_delta -= dirty_sectors; 12601c6fdbd8SKent Overstreet w->io->op.new_i_size = i_size; 12611c6fdbd8SKent Overstreet 12627f5e31e1SKent Overstreet offset += sectors; 12637f5e31e1SKent Overstreet } 12647f5e31e1SKent Overstreet 12657f5e31e1SKent Overstreet if (atomic_dec_and_test(&s->write_count)) 12667f5e31e1SKent Overstreet end_page_writeback(page); 12677f5e31e1SKent Overstreet 12681c6fdbd8SKent Overstreet return 0; 12691c6fdbd8SKent Overstreet } 12701c6fdbd8SKent Overstreet 12711c6fdbd8SKent Overstreet int bch2_writepages(struct address_space *mapping, struct writeback_control *wbc) 12721c6fdbd8SKent Overstreet { 12731c6fdbd8SKent Overstreet struct bch_fs *c = mapping->host->i_sb->s_fs_info; 12741c6fdbd8SKent Overstreet struct bch_writepage_state w = 12751c6fdbd8SKent Overstreet bch_writepage_state_init(c, to_bch_ei(mapping->host)); 12761c6fdbd8SKent Overstreet struct blk_plug plug; 12771c6fdbd8SKent Overstreet int ret; 12781c6fdbd8SKent Overstreet 12791c6fdbd8SKent Overstreet blk_start_plug(&plug); 12801c6fdbd8SKent Overstreet ret = write_cache_pages(mapping, wbc, __bch2_writepage, &w); 12811c6fdbd8SKent Overstreet if (w.io) 12821c6fdbd8SKent Overstreet bch2_writepage_do_io(&w); 12831c6fdbd8SKent Overstreet blk_finish_plug(&plug); 12841c6fdbd8SKent Overstreet return ret; 12851c6fdbd8SKent Overstreet } 12861c6fdbd8SKent Overstreet 12871c6fdbd8SKent Overstreet int bch2_writepage(struct page *page, struct writeback_control *wbc) 12881c6fdbd8SKent Overstreet { 12891c6fdbd8SKent Overstreet struct bch_fs *c = page->mapping->host->i_sb->s_fs_info; 12901c6fdbd8SKent Overstreet struct bch_writepage_state w = 12911c6fdbd8SKent Overstreet bch_writepage_state_init(c, to_bch_ei(page->mapping->host)); 12921c6fdbd8SKent Overstreet int ret; 12931c6fdbd8SKent Overstreet 12941c6fdbd8SKent Overstreet ret = __bch2_writepage(page_folio(page), wbc, &w); 12951c6fdbd8SKent Overstreet if (w.io) 12961c6fdbd8SKent Overstreet bch2_writepage_do_io(&w); 12971c6fdbd8SKent Overstreet 12981c6fdbd8SKent Overstreet return ret; 12991c6fdbd8SKent Overstreet } 13001c6fdbd8SKent Overstreet 13011c6fdbd8SKent Overstreet /* buffered writes: */ 13021c6fdbd8SKent Overstreet 13031c6fdbd8SKent Overstreet int bch2_write_begin(struct file *file, struct address_space *mapping, 13041c6fdbd8SKent Overstreet loff_t pos, unsigned len, 13051c6fdbd8SKent Overstreet struct page **pagep, void **fsdata) 13061c6fdbd8SKent Overstreet { 13071c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(mapping->host); 13081c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 1309d1542e03SKent Overstreet struct bch2_page_reservation *res; 13101c6fdbd8SKent Overstreet pgoff_t index = pos >> PAGE_SHIFT; 13111c6fdbd8SKent Overstreet unsigned offset = pos & (PAGE_SIZE - 1); 13121c6fdbd8SKent Overstreet struct page *page; 13131c6fdbd8SKent Overstreet int ret = -ENOMEM; 13141c6fdbd8SKent Overstreet 1315d1542e03SKent Overstreet res = kmalloc(sizeof(*res), GFP_KERNEL); 1316d1542e03SKent Overstreet if (!res) 1317d1542e03SKent Overstreet return -ENOMEM; 1318d1542e03SKent Overstreet 1319d1542e03SKent Overstreet bch2_page_reservation_init(c, inode, res); 1320d1542e03SKent Overstreet *fsdata = res; 13211c6fdbd8SKent Overstreet 13221c6fdbd8SKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 13231c6fdbd8SKent Overstreet 13241c6fdbd8SKent Overstreet page = grab_cache_page_write_begin(mapping, index); 13251c6fdbd8SKent Overstreet if (!page) 13261c6fdbd8SKent Overstreet goto err_unlock; 13271c6fdbd8SKent Overstreet 13281c6fdbd8SKent Overstreet if (PageUptodate(page)) 13291c6fdbd8SKent Overstreet goto out; 13301c6fdbd8SKent Overstreet 13311c6fdbd8SKent Overstreet /* If we're writing entire page, don't need to read it in first: */ 13321c6fdbd8SKent Overstreet if (len == PAGE_SIZE) 13331c6fdbd8SKent Overstreet goto out; 13341c6fdbd8SKent Overstreet 13351c6fdbd8SKent Overstreet if (!offset && pos + len >= inode->v.i_size) { 13361c6fdbd8SKent Overstreet zero_user_segment(page, len, PAGE_SIZE); 13371c6fdbd8SKent Overstreet flush_dcache_page(page); 13381c6fdbd8SKent Overstreet goto out; 13391c6fdbd8SKent Overstreet } 13401c6fdbd8SKent Overstreet 13411c6fdbd8SKent Overstreet if (index > inode->v.i_size >> PAGE_SHIFT) { 13421c6fdbd8SKent Overstreet zero_user_segments(page, 0, offset, offset + len, PAGE_SIZE); 13431c6fdbd8SKent Overstreet flush_dcache_page(page); 13441c6fdbd8SKent Overstreet goto out; 13451c6fdbd8SKent Overstreet } 13461c6fdbd8SKent Overstreet readpage: 13471c6fdbd8SKent Overstreet ret = bch2_read_single_page(page, mapping); 13481c6fdbd8SKent Overstreet if (ret) 13491c6fdbd8SKent Overstreet goto err; 13501c6fdbd8SKent Overstreet out: 1351d1542e03SKent Overstreet ret = bch2_page_reservation_get(c, inode, page, res, 1352d1542e03SKent Overstreet offset, len, true); 13531c6fdbd8SKent Overstreet if (ret) { 13541c6fdbd8SKent Overstreet if (!PageUptodate(page)) { 13551c6fdbd8SKent Overstreet /* 13561c6fdbd8SKent Overstreet * If the page hasn't been read in, we won't know if we 13571c6fdbd8SKent Overstreet * actually need a reservation - we don't actually need 13581c6fdbd8SKent Overstreet * to read here, we just need to check if the page is 13591c6fdbd8SKent Overstreet * fully backed by uncompressed data: 13601c6fdbd8SKent Overstreet */ 13611c6fdbd8SKent Overstreet goto readpage; 13621c6fdbd8SKent Overstreet } 13631c6fdbd8SKent Overstreet 13641c6fdbd8SKent Overstreet goto err; 13651c6fdbd8SKent Overstreet } 13661c6fdbd8SKent Overstreet 13671c6fdbd8SKent Overstreet *pagep = page; 13681c6fdbd8SKent Overstreet return 0; 13691c6fdbd8SKent Overstreet err: 13701c6fdbd8SKent Overstreet unlock_page(page); 13711c6fdbd8SKent Overstreet put_page(page); 13721c6fdbd8SKent Overstreet *pagep = NULL; 13731c6fdbd8SKent Overstreet err_unlock: 13741c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 1375d1542e03SKent Overstreet kfree(res); 1376d1542e03SKent Overstreet *fsdata = NULL; 13771c6fdbd8SKent Overstreet return ret; 13781c6fdbd8SKent Overstreet } 13791c6fdbd8SKent Overstreet 13801c6fdbd8SKent Overstreet int bch2_write_end(struct file *file, struct address_space *mapping, 13811c6fdbd8SKent Overstreet loff_t pos, unsigned len, unsigned copied, 13821c6fdbd8SKent Overstreet struct page *page, void *fsdata) 13831c6fdbd8SKent Overstreet { 13841c6fdbd8SKent Overstreet struct bch_inode_info *inode = to_bch_ei(mapping->host); 13851c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 1386d1542e03SKent Overstreet struct bch2_page_reservation *res = fsdata; 1387d1542e03SKent Overstreet unsigned offset = pos & (PAGE_SIZE - 1); 13881c6fdbd8SKent Overstreet 13891c6fdbd8SKent Overstreet lockdep_assert_held(&inode->v.i_rwsem); 13901c6fdbd8SKent Overstreet 13911c6fdbd8SKent Overstreet if (unlikely(copied < len && !PageUptodate(page))) { 13921c6fdbd8SKent Overstreet /* 13931c6fdbd8SKent Overstreet * The page needs to be read in, but that would destroy 13941c6fdbd8SKent Overstreet * our partial write - simplest thing is to just force 13951c6fdbd8SKent Overstreet * userspace to redo the write: 13961c6fdbd8SKent Overstreet */ 13971c6fdbd8SKent Overstreet zero_user(page, 0, PAGE_SIZE); 13981c6fdbd8SKent Overstreet flush_dcache_page(page); 13991c6fdbd8SKent Overstreet copied = 0; 14001c6fdbd8SKent Overstreet } 14011c6fdbd8SKent Overstreet 14021c6fdbd8SKent Overstreet spin_lock(&inode->v.i_lock); 14031c6fdbd8SKent Overstreet if (pos + copied > inode->v.i_size) 14041c6fdbd8SKent Overstreet i_size_write(&inode->v, pos + copied); 14051c6fdbd8SKent Overstreet spin_unlock(&inode->v.i_lock); 14061c6fdbd8SKent Overstreet 14071c6fdbd8SKent Overstreet if (copied) { 14081c6fdbd8SKent Overstreet if (!PageUptodate(page)) 14091c6fdbd8SKent Overstreet SetPageUptodate(page); 1410d1542e03SKent Overstreet 1411d1542e03SKent Overstreet bch2_set_page_dirty(c, inode, page, res, offset, copied); 14121c6fdbd8SKent Overstreet 14131c6fdbd8SKent Overstreet inode->ei_last_dirtied = (unsigned long) current; 14141c6fdbd8SKent Overstreet } 14151c6fdbd8SKent Overstreet 14161c6fdbd8SKent Overstreet unlock_page(page); 14171c6fdbd8SKent Overstreet put_page(page); 14181c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 14191c6fdbd8SKent Overstreet 1420d1542e03SKent Overstreet bch2_page_reservation_put(c, inode, res); 1421d1542e03SKent Overstreet kfree(res); 1422d1542e03SKent Overstreet 14231c6fdbd8SKent Overstreet return copied; 14241c6fdbd8SKent Overstreet } 14251c6fdbd8SKent Overstreet 14261c6fdbd8SKent Overstreet #define WRITE_BATCH_PAGES 32 14271c6fdbd8SKent Overstreet 14281c6fdbd8SKent Overstreet static int __bch2_buffered_write(struct bch_inode_info *inode, 14291c6fdbd8SKent Overstreet struct address_space *mapping, 14301c6fdbd8SKent Overstreet struct iov_iter *iter, 14311c6fdbd8SKent Overstreet loff_t pos, unsigned len) 14321c6fdbd8SKent Overstreet { 14331c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 14341c6fdbd8SKent Overstreet struct page *pages[WRITE_BATCH_PAGES]; 1435d1542e03SKent Overstreet struct bch2_page_reservation res; 14361c6fdbd8SKent Overstreet unsigned long index = pos >> PAGE_SHIFT; 14371c6fdbd8SKent Overstreet unsigned offset = pos & (PAGE_SIZE - 1); 14381c6fdbd8SKent Overstreet unsigned nr_pages = DIV_ROUND_UP(offset + len, PAGE_SIZE); 1439d1542e03SKent Overstreet unsigned i, reserved = 0, set_dirty = 0; 1440d1542e03SKent Overstreet unsigned copied = 0, nr_pages_copied = 0; 14411c6fdbd8SKent Overstreet int ret = 0; 14421c6fdbd8SKent Overstreet 14431c6fdbd8SKent Overstreet BUG_ON(!len); 14441c6fdbd8SKent Overstreet BUG_ON(nr_pages > ARRAY_SIZE(pages)); 14451c6fdbd8SKent Overstreet 1446d1542e03SKent Overstreet bch2_page_reservation_init(c, inode, &res); 1447d1542e03SKent Overstreet 14481c6fdbd8SKent Overstreet for (i = 0; i < nr_pages; i++) { 14491c6fdbd8SKent Overstreet pages[i] = grab_cache_page_write_begin(mapping, index + i); 14501c6fdbd8SKent Overstreet if (!pages[i]) { 14511c6fdbd8SKent Overstreet nr_pages = i; 14528de819f8SKent Overstreet if (!i) { 14531c6fdbd8SKent Overstreet ret = -ENOMEM; 14541c6fdbd8SKent Overstreet goto out; 14551c6fdbd8SKent Overstreet } 14568de819f8SKent Overstreet len = min_t(unsigned, len, 14578de819f8SKent Overstreet nr_pages * PAGE_SIZE - offset); 14588de819f8SKent Overstreet break; 14598de819f8SKent Overstreet } 14601c6fdbd8SKent Overstreet } 14611c6fdbd8SKent Overstreet 14621c6fdbd8SKent Overstreet if (offset && !PageUptodate(pages[0])) { 14631c6fdbd8SKent Overstreet ret = bch2_read_single_page(pages[0], mapping); 14641c6fdbd8SKent Overstreet if (ret) 14651c6fdbd8SKent Overstreet goto out; 14661c6fdbd8SKent Overstreet } 14671c6fdbd8SKent Overstreet 14681c6fdbd8SKent Overstreet if ((pos + len) & (PAGE_SIZE - 1) && 14691c6fdbd8SKent Overstreet !PageUptodate(pages[nr_pages - 1])) { 14701c6fdbd8SKent Overstreet if ((index + nr_pages - 1) << PAGE_SHIFT >= inode->v.i_size) { 14711c6fdbd8SKent Overstreet zero_user(pages[nr_pages - 1], 0, PAGE_SIZE); 14721c6fdbd8SKent Overstreet } else { 14731c6fdbd8SKent Overstreet ret = bch2_read_single_page(pages[nr_pages - 1], mapping); 14741c6fdbd8SKent Overstreet if (ret) 14751c6fdbd8SKent Overstreet goto out; 14761c6fdbd8SKent Overstreet } 14771c6fdbd8SKent Overstreet } 14781c6fdbd8SKent Overstreet 1479d1542e03SKent Overstreet while (reserved < len) { 1480d1542e03SKent Overstreet struct page *page = pages[(offset + reserved) >> PAGE_SHIFT]; 1481d1542e03SKent Overstreet unsigned pg_offset = (offset + reserved) & (PAGE_SIZE - 1); 1482d1542e03SKent Overstreet unsigned pg_len = min_t(unsigned, len - reserved, 1483d1542e03SKent Overstreet PAGE_SIZE - pg_offset); 1484d1542e03SKent Overstreet retry_reservation: 1485d1542e03SKent Overstreet ret = bch2_page_reservation_get(c, inode, page, &res, 1486d1542e03SKent Overstreet pg_offset, pg_len, true); 14871c6fdbd8SKent Overstreet 1488d1542e03SKent Overstreet if (ret && !PageUptodate(page)) { 1489d1542e03SKent Overstreet ret = bch2_read_single_page(page, mapping); 1490d1542e03SKent Overstreet if (!ret) 1491d1542e03SKent Overstreet goto retry_reservation; 14921c6fdbd8SKent Overstreet } 14931c6fdbd8SKent Overstreet 14941c6fdbd8SKent Overstreet if (ret) 14951c6fdbd8SKent Overstreet goto out; 1496d1542e03SKent Overstreet 1497d1542e03SKent Overstreet reserved += pg_len; 14981c6fdbd8SKent Overstreet } 14991c6fdbd8SKent Overstreet 15001c6fdbd8SKent Overstreet if (mapping_writably_mapped(mapping)) 15011c6fdbd8SKent Overstreet for (i = 0; i < nr_pages; i++) 15021c6fdbd8SKent Overstreet flush_dcache_page(pages[i]); 15031c6fdbd8SKent Overstreet 15041c6fdbd8SKent Overstreet while (copied < len) { 15051c6fdbd8SKent Overstreet struct page *page = pages[(offset + copied) >> PAGE_SHIFT]; 15061c6fdbd8SKent Overstreet unsigned pg_offset = (offset + copied) & (PAGE_SIZE - 1); 1507d1542e03SKent Overstreet unsigned pg_len = min_t(unsigned, len - copied, 15081c6fdbd8SKent Overstreet PAGE_SIZE - pg_offset); 15091c6fdbd8SKent Overstreet unsigned pg_copied = copy_page_from_iter_atomic(page, 1510d1542e03SKent Overstreet pg_offset, pg_len, iter); 1511d1542e03SKent Overstreet 1512d1542e03SKent Overstreet if (!pg_copied) 1513d1542e03SKent Overstreet break; 15141c6fdbd8SKent Overstreet 1515912bdf17SKent Overstreet if (!PageUptodate(page) && 1516912bdf17SKent Overstreet pg_copied != PAGE_SIZE && 1517912bdf17SKent Overstreet pos + copied + pg_copied < inode->v.i_size) { 1518912bdf17SKent Overstreet zero_user(page, 0, PAGE_SIZE); 1519912bdf17SKent Overstreet break; 1520912bdf17SKent Overstreet } 1521912bdf17SKent Overstreet 15221c6fdbd8SKent Overstreet flush_dcache_page(page); 15231c6fdbd8SKent Overstreet copied += pg_copied; 1524912bdf17SKent Overstreet 1525912bdf17SKent Overstreet if (pg_copied != pg_len) 1526912bdf17SKent Overstreet break; 15271c6fdbd8SKent Overstreet } 15281c6fdbd8SKent Overstreet 15291c6fdbd8SKent Overstreet if (!copied) 15301c6fdbd8SKent Overstreet goto out; 15311c6fdbd8SKent Overstreet 1532877dfb34SKent Overstreet spin_lock(&inode->v.i_lock); 1533877dfb34SKent Overstreet if (pos + copied > inode->v.i_size) 1534877dfb34SKent Overstreet i_size_write(&inode->v, pos + copied); 1535877dfb34SKent Overstreet spin_unlock(&inode->v.i_lock); 1536877dfb34SKent Overstreet 1537d1542e03SKent Overstreet while (set_dirty < copied) { 1538d1542e03SKent Overstreet struct page *page = pages[(offset + set_dirty) >> PAGE_SHIFT]; 1539d1542e03SKent Overstreet unsigned pg_offset = (offset + set_dirty) & (PAGE_SIZE - 1); 1540d1542e03SKent Overstreet unsigned pg_len = min_t(unsigned, copied - set_dirty, 1541d1542e03SKent Overstreet PAGE_SIZE - pg_offset); 1542d1542e03SKent Overstreet 1543d1542e03SKent Overstreet if (!PageUptodate(page)) 1544d1542e03SKent Overstreet SetPageUptodate(page); 1545d1542e03SKent Overstreet 1546d1542e03SKent Overstreet bch2_set_page_dirty(c, inode, page, &res, pg_offset, pg_len); 1547d1542e03SKent Overstreet unlock_page(page); 1548d1542e03SKent Overstreet put_page(page); 1549d1542e03SKent Overstreet 1550d1542e03SKent Overstreet set_dirty += pg_len; 1551d1542e03SKent Overstreet } 1552877dfb34SKent Overstreet 1553877dfb34SKent Overstreet nr_pages_copied = DIV_ROUND_UP(offset + copied, PAGE_SIZE); 1554877dfb34SKent Overstreet inode->ei_last_dirtied = (unsigned long) current; 15551c6fdbd8SKent Overstreet out: 1556d1542e03SKent Overstreet for (i = nr_pages_copied; i < nr_pages; i++) { 15571c6fdbd8SKent Overstreet unlock_page(pages[i]); 15581c6fdbd8SKent Overstreet put_page(pages[i]); 15591c6fdbd8SKent Overstreet } 15601c6fdbd8SKent Overstreet 1561d1542e03SKent Overstreet bch2_page_reservation_put(c, inode, &res); 15621c6fdbd8SKent Overstreet 15631c6fdbd8SKent Overstreet return copied ?: ret; 15641c6fdbd8SKent Overstreet } 15651c6fdbd8SKent Overstreet 15661c6fdbd8SKent Overstreet static ssize_t bch2_buffered_write(struct kiocb *iocb, struct iov_iter *iter) 15671c6fdbd8SKent Overstreet { 15681c6fdbd8SKent Overstreet struct file *file = iocb->ki_filp; 15691c6fdbd8SKent Overstreet struct address_space *mapping = file->f_mapping; 15701c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 15711c6fdbd8SKent Overstreet loff_t pos = iocb->ki_pos; 15721c6fdbd8SKent Overstreet ssize_t written = 0; 15731c6fdbd8SKent Overstreet int ret = 0; 15741c6fdbd8SKent Overstreet 15751c6fdbd8SKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 15761c6fdbd8SKent Overstreet 15771c6fdbd8SKent Overstreet do { 15781c6fdbd8SKent Overstreet unsigned offset = pos & (PAGE_SIZE - 1); 15791c6fdbd8SKent Overstreet unsigned bytes = min_t(unsigned long, iov_iter_count(iter), 15801c6fdbd8SKent Overstreet PAGE_SIZE * WRITE_BATCH_PAGES - offset); 15811c6fdbd8SKent Overstreet again: 15821c6fdbd8SKent Overstreet /* 15831c6fdbd8SKent Overstreet * Bring in the user page that we will copy from _first_. 15841c6fdbd8SKent Overstreet * Otherwise there's a nasty deadlock on copying from the 15851c6fdbd8SKent Overstreet * same page as we're writing to, without it being marked 15861c6fdbd8SKent Overstreet * up-to-date. 15871c6fdbd8SKent Overstreet * 15881c6fdbd8SKent Overstreet * Not only is this an optimisation, but it is also required 15891c6fdbd8SKent Overstreet * to check that the address is actually valid, when atomic 15901c6fdbd8SKent Overstreet * usercopies are used, below. 15911c6fdbd8SKent Overstreet */ 15921c6fdbd8SKent Overstreet if (unlikely(fault_in_iov_iter_readable(iter, bytes))) { 15931c6fdbd8SKent Overstreet bytes = min_t(unsigned long, iov_iter_count(iter), 15941c6fdbd8SKent Overstreet PAGE_SIZE - offset); 15951c6fdbd8SKent Overstreet 15961c6fdbd8SKent Overstreet if (unlikely(fault_in_iov_iter_readable(iter, bytes))) { 15971c6fdbd8SKent Overstreet ret = -EFAULT; 15981c6fdbd8SKent Overstreet break; 15991c6fdbd8SKent Overstreet } 16001c6fdbd8SKent Overstreet } 16011c6fdbd8SKent Overstreet 16021c6fdbd8SKent Overstreet if (unlikely(fatal_signal_pending(current))) { 16031c6fdbd8SKent Overstreet ret = -EINTR; 16041c6fdbd8SKent Overstreet break; 16051c6fdbd8SKent Overstreet } 16061c6fdbd8SKent Overstreet 16071c6fdbd8SKent Overstreet ret = __bch2_buffered_write(inode, mapping, iter, pos, bytes); 16081c6fdbd8SKent Overstreet if (unlikely(ret < 0)) 16091c6fdbd8SKent Overstreet break; 16101c6fdbd8SKent Overstreet 16111c6fdbd8SKent Overstreet cond_resched(); 16121c6fdbd8SKent Overstreet 16131c6fdbd8SKent Overstreet if (unlikely(ret == 0)) { 16141c6fdbd8SKent Overstreet /* 16151c6fdbd8SKent Overstreet * If we were unable to copy any data at all, we must 16161c6fdbd8SKent Overstreet * fall back to a single segment length write. 16171c6fdbd8SKent Overstreet * 16181c6fdbd8SKent Overstreet * If we didn't fallback here, we could livelock 16191c6fdbd8SKent Overstreet * because not all segments in the iov can be copied at 16201c6fdbd8SKent Overstreet * once without a pagefault. 16211c6fdbd8SKent Overstreet */ 16221c6fdbd8SKent Overstreet bytes = min_t(unsigned long, PAGE_SIZE - offset, 16231c6fdbd8SKent Overstreet iov_iter_single_seg_count(iter)); 16241c6fdbd8SKent Overstreet goto again; 16251c6fdbd8SKent Overstreet } 16261c6fdbd8SKent Overstreet pos += ret; 16271c6fdbd8SKent Overstreet written += ret; 1628912bdf17SKent Overstreet ret = 0; 16291c6fdbd8SKent Overstreet 16301c6fdbd8SKent Overstreet balance_dirty_pages_ratelimited(mapping); 16311c6fdbd8SKent Overstreet } while (iov_iter_count(iter)); 16321c6fdbd8SKent Overstreet 16331c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 16341c6fdbd8SKent Overstreet 16351c6fdbd8SKent Overstreet return written ? written : ret; 16361c6fdbd8SKent Overstreet } 16371c6fdbd8SKent Overstreet 16381c6fdbd8SKent Overstreet /* O_DIRECT reads */ 16391c6fdbd8SKent Overstreet 1640b4725cc1SKent Overstreet static void bio_check_or_release(struct bio *bio, bool check_dirty) 1641b4725cc1SKent Overstreet { 1642b4725cc1SKent Overstreet if (check_dirty) { 1643b4725cc1SKent Overstreet bio_check_pages_dirty(bio); 1644b4725cc1SKent Overstreet } else { 1645b4725cc1SKent Overstreet bio_release_pages(bio, false); 1646b4725cc1SKent Overstreet bio_put(bio); 1647b4725cc1SKent Overstreet } 1648b4725cc1SKent Overstreet } 1649b4725cc1SKent Overstreet 16501c6fdbd8SKent Overstreet static void bch2_dio_read_complete(struct closure *cl) 16511c6fdbd8SKent Overstreet { 16521c6fdbd8SKent Overstreet struct dio_read *dio = container_of(cl, struct dio_read, cl); 16531c6fdbd8SKent Overstreet 16541c6fdbd8SKent Overstreet dio->req->ki_complete(dio->req, dio->ret); 1655b4725cc1SKent Overstreet bio_check_or_release(&dio->rbio.bio, dio->should_dirty); 16561c6fdbd8SKent Overstreet } 16571c6fdbd8SKent Overstreet 16581c6fdbd8SKent Overstreet static void bch2_direct_IO_read_endio(struct bio *bio) 16591c6fdbd8SKent Overstreet { 16601c6fdbd8SKent Overstreet struct dio_read *dio = bio->bi_private; 16611c6fdbd8SKent Overstreet 16621c6fdbd8SKent Overstreet if (bio->bi_status) 16631c6fdbd8SKent Overstreet dio->ret = blk_status_to_errno(bio->bi_status); 16641c6fdbd8SKent Overstreet 16651c6fdbd8SKent Overstreet closure_put(&dio->cl); 16661c6fdbd8SKent Overstreet } 16671c6fdbd8SKent Overstreet 16681c6fdbd8SKent Overstreet static void bch2_direct_IO_read_split_endio(struct bio *bio) 16691c6fdbd8SKent Overstreet { 1670b4725cc1SKent Overstreet struct dio_read *dio = bio->bi_private; 1671b4725cc1SKent Overstreet bool should_dirty = dio->should_dirty; 1672b4725cc1SKent Overstreet 16731c6fdbd8SKent Overstreet bch2_direct_IO_read_endio(bio); 1674b4725cc1SKent Overstreet bio_check_or_release(bio, should_dirty); 16751c6fdbd8SKent Overstreet } 16761c6fdbd8SKent Overstreet 16771c6fdbd8SKent Overstreet static int bch2_direct_IO_read(struct kiocb *req, struct iov_iter *iter) 16781c6fdbd8SKent Overstreet { 16791c6fdbd8SKent Overstreet struct file *file = req->ki_filp; 16801c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 16811c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 16829a3df993SKent Overstreet struct bch_io_opts opts = io_opts(c, &inode->ei_inode); 16831c6fdbd8SKent Overstreet struct dio_read *dio; 16841c6fdbd8SKent Overstreet struct bio *bio; 16851c6fdbd8SKent Overstreet loff_t offset = req->ki_pos; 16861c6fdbd8SKent Overstreet bool sync = is_sync_kiocb(req); 16871c6fdbd8SKent Overstreet size_t shorten; 16881c6fdbd8SKent Overstreet ssize_t ret; 16891c6fdbd8SKent Overstreet 16901c6fdbd8SKent Overstreet if ((offset|iter->count) & (block_bytes(c) - 1)) 16911c6fdbd8SKent Overstreet return -EINVAL; 16921c6fdbd8SKent Overstreet 16931c6fdbd8SKent Overstreet ret = min_t(loff_t, iter->count, 16941c6fdbd8SKent Overstreet max_t(loff_t, 0, i_size_read(&inode->v) - offset)); 16951c6fdbd8SKent Overstreet 16961c6fdbd8SKent Overstreet if (!ret) 16971c6fdbd8SKent Overstreet return ret; 16981c6fdbd8SKent Overstreet 16991c6fdbd8SKent Overstreet shorten = iov_iter_count(iter) - round_up(ret, block_bytes(c)); 17001c6fdbd8SKent Overstreet iter->count -= shorten; 17011c6fdbd8SKent Overstreet 17021c6fdbd8SKent Overstreet bio = bio_alloc_bioset(NULL, 17031c6fdbd8SKent Overstreet iov_iter_npages(iter, BIO_MAX_VECS), 17041c6fdbd8SKent Overstreet REQ_OP_READ, 17051c6fdbd8SKent Overstreet GFP_KERNEL, 17061c6fdbd8SKent Overstreet &c->dio_read_bioset); 17071c6fdbd8SKent Overstreet 17081c6fdbd8SKent Overstreet bio->bi_end_io = bch2_direct_IO_read_endio; 17091c6fdbd8SKent Overstreet 17101c6fdbd8SKent Overstreet dio = container_of(bio, struct dio_read, rbio.bio); 17111c6fdbd8SKent Overstreet closure_init(&dio->cl, NULL); 17121c6fdbd8SKent Overstreet 17131c6fdbd8SKent Overstreet /* 17141c6fdbd8SKent Overstreet * this is a _really_ horrible hack just to avoid an atomic sub at the 17151c6fdbd8SKent Overstreet * end: 17161c6fdbd8SKent Overstreet */ 17171c6fdbd8SKent Overstreet if (!sync) { 17181c6fdbd8SKent Overstreet set_closure_fn(&dio->cl, bch2_dio_read_complete, NULL); 17191c6fdbd8SKent Overstreet atomic_set(&dio->cl.remaining, 17201c6fdbd8SKent Overstreet CLOSURE_REMAINING_INITIALIZER - 17211c6fdbd8SKent Overstreet CLOSURE_RUNNING + 17221c6fdbd8SKent Overstreet CLOSURE_DESTRUCTOR); 17231c6fdbd8SKent Overstreet } else { 17241c6fdbd8SKent Overstreet atomic_set(&dio->cl.remaining, 17251c6fdbd8SKent Overstreet CLOSURE_REMAINING_INITIALIZER + 1); 17261c6fdbd8SKent Overstreet } 17271c6fdbd8SKent Overstreet 17281c6fdbd8SKent Overstreet dio->req = req; 17291c6fdbd8SKent Overstreet dio->ret = ret; 1730b4725cc1SKent Overstreet /* 1731b4725cc1SKent Overstreet * This is one of the sketchier things I've encountered: we have to skip 1732b4725cc1SKent Overstreet * the dirtying of requests that are internal from the kernel (i.e. from 1733b4725cc1SKent Overstreet * loopback), because we'll deadlock on page_lock. 1734b4725cc1SKent Overstreet */ 1735b4725cc1SKent Overstreet dio->should_dirty = iter_is_iovec(iter); 17361c6fdbd8SKent Overstreet 17371c6fdbd8SKent Overstreet goto start; 17381c6fdbd8SKent Overstreet while (iter->count) { 17391c6fdbd8SKent Overstreet bio = bio_alloc_bioset(NULL, 17401c6fdbd8SKent Overstreet iov_iter_npages(iter, BIO_MAX_VECS), 17411c6fdbd8SKent Overstreet REQ_OP_READ, 17421c6fdbd8SKent Overstreet GFP_KERNEL, 17431c6fdbd8SKent Overstreet &c->bio_read); 17441c6fdbd8SKent Overstreet bio->bi_end_io = bch2_direct_IO_read_split_endio; 17451c6fdbd8SKent Overstreet start: 17461c6fdbd8SKent Overstreet bio->bi_opf = REQ_OP_READ|REQ_SYNC; 17471c6fdbd8SKent Overstreet bio->bi_iter.bi_sector = offset >> 9; 17481c6fdbd8SKent Overstreet bio->bi_private = dio; 17491c6fdbd8SKent Overstreet 17501c6fdbd8SKent Overstreet ret = bio_iov_iter_get_pages(bio, iter); 17511c6fdbd8SKent Overstreet if (ret < 0) { 17521c6fdbd8SKent Overstreet /* XXX: fault inject this path */ 17531c6fdbd8SKent Overstreet bio->bi_status = BLK_STS_RESOURCE; 17541c6fdbd8SKent Overstreet bio_endio(bio); 17551c6fdbd8SKent Overstreet break; 17561c6fdbd8SKent Overstreet } 17571c6fdbd8SKent Overstreet 17581c6fdbd8SKent Overstreet offset += bio->bi_iter.bi_size; 1759b4725cc1SKent Overstreet 1760b4725cc1SKent Overstreet if (dio->should_dirty) 17611c6fdbd8SKent Overstreet bio_set_pages_dirty(bio); 17621c6fdbd8SKent Overstreet 17631c6fdbd8SKent Overstreet if (iter->count) 17641c6fdbd8SKent Overstreet closure_get(&dio->cl); 17651c6fdbd8SKent Overstreet 17668c6d298aSKent Overstreet bch2_read(c, rbio_init(bio, opts), inode_inum(inode)); 17671c6fdbd8SKent Overstreet } 17681c6fdbd8SKent Overstreet 17691c6fdbd8SKent Overstreet iter->count += shorten; 17701c6fdbd8SKent Overstreet 17711c6fdbd8SKent Overstreet if (sync) { 17721c6fdbd8SKent Overstreet closure_sync(&dio->cl); 17731c6fdbd8SKent Overstreet closure_debug_destroy(&dio->cl); 17741c6fdbd8SKent Overstreet ret = dio->ret; 1775b4725cc1SKent Overstreet bio_check_or_release(&dio->rbio.bio, dio->should_dirty); 17761c6fdbd8SKent Overstreet return ret; 17771c6fdbd8SKent Overstreet } else { 17781c6fdbd8SKent Overstreet return -EIOCBQUEUED; 17791c6fdbd8SKent Overstreet } 17801c6fdbd8SKent Overstreet } 17811c6fdbd8SKent Overstreet 17821c6fdbd8SKent Overstreet ssize_t bch2_read_iter(struct kiocb *iocb, struct iov_iter *iter) 17831c6fdbd8SKent Overstreet { 17841c6fdbd8SKent Overstreet struct file *file = iocb->ki_filp; 17851c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 17861c6fdbd8SKent Overstreet struct address_space *mapping = file->f_mapping; 17871c6fdbd8SKent Overstreet size_t count = iov_iter_count(iter); 17881c6fdbd8SKent Overstreet ssize_t ret; 17891c6fdbd8SKent Overstreet 17901c6fdbd8SKent Overstreet if (!count) 17911c6fdbd8SKent Overstreet return 0; /* skip atime */ 17921c6fdbd8SKent Overstreet 17931c6fdbd8SKent Overstreet if (iocb->ki_flags & IOCB_DIRECT) { 17941c6fdbd8SKent Overstreet struct blk_plug plug; 17951c6fdbd8SKent Overstreet 1796a023127aSKent Overstreet if (unlikely(mapping->nrpages)) { 17971c6fdbd8SKent Overstreet ret = filemap_write_and_wait_range(mapping, 17981c6fdbd8SKent Overstreet iocb->ki_pos, 17991c6fdbd8SKent Overstreet iocb->ki_pos + count - 1); 18001c6fdbd8SKent Overstreet if (ret < 0) 18011c6fdbd8SKent Overstreet return ret; 1802a023127aSKent Overstreet } 18031c6fdbd8SKent Overstreet 18041c6fdbd8SKent Overstreet file_accessed(file); 18051c6fdbd8SKent Overstreet 18061c6fdbd8SKent Overstreet blk_start_plug(&plug); 18071c6fdbd8SKent Overstreet ret = bch2_direct_IO_read(iocb, iter); 18081c6fdbd8SKent Overstreet blk_finish_plug(&plug); 18091c6fdbd8SKent Overstreet 18101c6fdbd8SKent Overstreet if (ret >= 0) 18111c6fdbd8SKent Overstreet iocb->ki_pos += ret; 18121c6fdbd8SKent Overstreet } else { 18131c6fdbd8SKent Overstreet bch2_pagecache_add_get(&inode->ei_pagecache_lock); 18141c6fdbd8SKent Overstreet ret = generic_file_read_iter(iocb, iter); 18151c6fdbd8SKent Overstreet bch2_pagecache_add_put(&inode->ei_pagecache_lock); 18161c6fdbd8SKent Overstreet } 18171c6fdbd8SKent Overstreet 18181c6fdbd8SKent Overstreet return ret; 18191c6fdbd8SKent Overstreet } 18201c6fdbd8SKent Overstreet 18211c6fdbd8SKent Overstreet /* O_DIRECT writes */ 18221c6fdbd8SKent Overstreet 18236fed42bbSKent Overstreet static bool bch2_check_range_allocated(struct bch_fs *c, subvol_inum inum, 18246fed42bbSKent Overstreet u64 offset, u64 size, 18256fed42bbSKent Overstreet unsigned nr_replicas, bool compressed) 18266fed42bbSKent Overstreet { 18276fed42bbSKent Overstreet struct btree_trans trans; 18286fed42bbSKent Overstreet struct btree_iter iter; 18296fed42bbSKent Overstreet struct bkey_s_c k; 18306fed42bbSKent Overstreet u64 end = offset + size; 18316fed42bbSKent Overstreet u32 snapshot; 18326fed42bbSKent Overstreet bool ret = true; 18336fed42bbSKent Overstreet int err; 18346fed42bbSKent Overstreet 18356fed42bbSKent Overstreet bch2_trans_init(&trans, c, 0, 0); 18366fed42bbSKent Overstreet retry: 18376fed42bbSKent Overstreet bch2_trans_begin(&trans); 18386fed42bbSKent Overstreet 18396fed42bbSKent Overstreet err = bch2_subvolume_get_snapshot(&trans, inum.subvol, &snapshot); 18406fed42bbSKent Overstreet if (err) 18416fed42bbSKent Overstreet goto err; 18426fed42bbSKent Overstreet 1843e5fa91d7SKent Overstreet for_each_btree_key_norestart(&trans, iter, BTREE_ID_extents, 18446fed42bbSKent Overstreet SPOS(inum.inum, offset, snapshot), 18456fed42bbSKent Overstreet BTREE_ITER_SLOTS, k, err) { 18466fed42bbSKent Overstreet if (bkey_cmp(bkey_start_pos(k.k), POS(inum.inum, end)) >= 0) 18476fed42bbSKent Overstreet break; 18486fed42bbSKent Overstreet 18498c6d298aSKent Overstreet if (k.k->p.snapshot != snapshot || 18508c6d298aSKent Overstreet nr_replicas > bch2_bkey_replicas(c, k) || 18516fed42bbSKent Overstreet (!compressed && bch2_bkey_sectors_compressed(k))) { 18526fed42bbSKent Overstreet ret = false; 18536fed42bbSKent Overstreet break; 18546fed42bbSKent Overstreet } 18556fed42bbSKent Overstreet } 18566fed42bbSKent Overstreet 18576fed42bbSKent Overstreet offset = iter.pos.offset; 18586fed42bbSKent Overstreet bch2_trans_iter_exit(&trans, &iter); 18596fed42bbSKent Overstreet err: 18606fed42bbSKent Overstreet if (err == -EINTR) 18616fed42bbSKent Overstreet goto retry; 18626fed42bbSKent Overstreet bch2_trans_exit(&trans); 18636fed42bbSKent Overstreet 18646fed42bbSKent Overstreet return err ? false : ret; 18656fed42bbSKent Overstreet } 18666fed42bbSKent Overstreet 18671c6fdbd8SKent Overstreet /* 18681c6fdbd8SKent Overstreet * We're going to return -EIOCBQUEUED, but we haven't finished consuming the 18691c6fdbd8SKent Overstreet * iov_iter yet, so we need to stash a copy of the iovec: it might be on the 18701c6fdbd8SKent Overstreet * caller's stack, we're not guaranteed that it will live for the duration of 18711c6fdbd8SKent Overstreet * the IO: 18721c6fdbd8SKent Overstreet */ 18731c6fdbd8SKent Overstreet static noinline int bch2_dio_write_copy_iov(struct dio_write *dio) 18741c6fdbd8SKent Overstreet { 18751c6fdbd8SKent Overstreet struct iovec *iov = dio->inline_vecs; 18761c6fdbd8SKent Overstreet 18771c6fdbd8SKent Overstreet /* 18781c6fdbd8SKent Overstreet * iov_iter has a single embedded iovec - nothing to do: 18791c6fdbd8SKent Overstreet */ 18801c6fdbd8SKent Overstreet if (iter_is_ubuf(&dio->iter)) 18811c6fdbd8SKent Overstreet return 0; 18821c6fdbd8SKent Overstreet 18831c6fdbd8SKent Overstreet /* 18841c6fdbd8SKent Overstreet * We don't currently handle non-iovec iov_iters here - return an error, 18851c6fdbd8SKent Overstreet * and we'll fall back to doing the IO synchronously: 18861c6fdbd8SKent Overstreet */ 18871c6fdbd8SKent Overstreet if (!iter_is_iovec(&dio->iter)) 18881c6fdbd8SKent Overstreet return -1; 18891c6fdbd8SKent Overstreet 18901c6fdbd8SKent Overstreet if (dio->iter.nr_segs > ARRAY_SIZE(dio->inline_vecs)) { 18911c6fdbd8SKent Overstreet iov = kmalloc_array(dio->iter.nr_segs, sizeof(*iov), 18921c6fdbd8SKent Overstreet GFP_KERNEL); 18931c6fdbd8SKent Overstreet if (unlikely(!iov)) 18941c6fdbd8SKent Overstreet return -ENOMEM; 18951c6fdbd8SKent Overstreet 18961c6fdbd8SKent Overstreet dio->free_iov = true; 18971c6fdbd8SKent Overstreet } 18981c6fdbd8SKent Overstreet 18991c6fdbd8SKent Overstreet memcpy(iov, dio->iter.__iov, dio->iter.nr_segs * sizeof(*iov)); 19001c6fdbd8SKent Overstreet dio->iter.__iov = iov; 19011c6fdbd8SKent Overstreet return 0; 19021c6fdbd8SKent Overstreet } 19031c6fdbd8SKent Overstreet 1904042a1f26SKent Overstreet static void bch2_dio_write_loop_async(struct bch_write_op *); 1905042a1f26SKent Overstreet 19061c6fdbd8SKent Overstreet static long bch2_dio_write_loop(struct dio_write *dio) 19071c6fdbd8SKent Overstreet { 1908ed484030SKent Overstreet bool kthread = (current->flags & PF_KTHREAD) != 0; 19091c6fdbd8SKent Overstreet struct kiocb *req = dio->req; 19101c6fdbd8SKent Overstreet struct address_space *mapping = req->ki_filp->f_mapping; 19119a3df993SKent Overstreet struct bch_inode_info *inode = file_bch_inode(req->ki_filp); 1912042a1f26SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 19139a3df993SKent Overstreet struct bio *bio = &dio->op.wbio.bio; 1914eb8e6e9cSKent Overstreet unsigned unaligned, iter_count; 1915eb8e6e9cSKent Overstreet bool sync = dio->sync, dropped_locks; 19161c6fdbd8SKent Overstreet long ret; 19171c6fdbd8SKent Overstreet 19181c6fdbd8SKent Overstreet if (dio->loop) 19191c6fdbd8SKent Overstreet goto loop; 19201c6fdbd8SKent Overstreet 19211c6fdbd8SKent Overstreet while (1) { 1922eb8e6e9cSKent Overstreet iter_count = dio->iter.count; 1923eb8e6e9cSKent Overstreet 1924ed484030SKent Overstreet if (kthread) 1925ed484030SKent Overstreet kthread_use_mm(dio->mm); 19261c6fdbd8SKent Overstreet BUG_ON(current->faults_disabled_mapping); 19271c6fdbd8SKent Overstreet current->faults_disabled_mapping = mapping; 19281c6fdbd8SKent Overstreet 19291c6fdbd8SKent Overstreet ret = bio_iov_iter_get_pages(bio, &dio->iter); 19301c6fdbd8SKent Overstreet 1931eb8e6e9cSKent Overstreet dropped_locks = fdm_dropped_locks(); 1932eb8e6e9cSKent Overstreet 19331c6fdbd8SKent Overstreet current->faults_disabled_mapping = NULL; 1934ed484030SKent Overstreet if (kthread) 1935ed484030SKent Overstreet kthread_unuse_mm(dio->mm); 19361c6fdbd8SKent Overstreet 1937eb8e6e9cSKent Overstreet /* 1938eb8e6e9cSKent Overstreet * If the fault handler returned an error but also signalled 1939eb8e6e9cSKent Overstreet * that it dropped & retook ei_pagecache_lock, we just need to 1940eb8e6e9cSKent Overstreet * re-shoot down the page cache and retry: 1941eb8e6e9cSKent Overstreet */ 1942eb8e6e9cSKent Overstreet if (dropped_locks && ret) 1943eb8e6e9cSKent Overstreet ret = 0; 1944eb8e6e9cSKent Overstreet 19451c6fdbd8SKent Overstreet if (unlikely(ret < 0)) 19461c6fdbd8SKent Overstreet goto err; 19471c6fdbd8SKent Overstreet 1948eb8e6e9cSKent Overstreet if (unlikely(dropped_locks)) { 1949eb8e6e9cSKent Overstreet ret = write_invalidate_inode_pages_range(mapping, 1950eb8e6e9cSKent Overstreet req->ki_pos, 1951eb8e6e9cSKent Overstreet req->ki_pos + iter_count - 1); 1952eb8e6e9cSKent Overstreet if (unlikely(ret)) 1953eb8e6e9cSKent Overstreet goto err; 1954eb8e6e9cSKent Overstreet 1955eb8e6e9cSKent Overstreet if (!bio->bi_iter.bi_size) 1956eb8e6e9cSKent Overstreet continue; 1957eb8e6e9cSKent Overstreet } 1958eb8e6e9cSKent Overstreet 19590a426c32SKent Overstreet unaligned = bio->bi_iter.bi_size & (block_bytes(c) - 1); 19600a426c32SKent Overstreet bio->bi_iter.bi_size -= unaligned; 19610a426c32SKent Overstreet iov_iter_revert(&dio->iter, unaligned); 19620a426c32SKent Overstreet 19630a426c32SKent Overstreet if (!bio->bi_iter.bi_size) { 19640a426c32SKent Overstreet /* 19650a426c32SKent Overstreet * bio_iov_iter_get_pages was only able to get < 19660a426c32SKent Overstreet * blocksize worth of pages: 19670a426c32SKent Overstreet */ 19680a426c32SKent Overstreet ret = -EFAULT; 19690a426c32SKent Overstreet goto err; 19700a426c32SKent Overstreet } 19710a426c32SKent Overstreet 1972042a1f26SKent Overstreet bch2_write_op_init(&dio->op, c, io_opts(c, &inode->ei_inode)); 1973042a1f26SKent Overstreet dio->op.end_io = bch2_dio_write_loop_async; 1974042a1f26SKent Overstreet dio->op.target = dio->op.opts.foreground_target; 1975042a1f26SKent Overstreet dio->op.write_point = writepoint_hashed((unsigned long) current); 1976042a1f26SKent Overstreet dio->op.nr_replicas = dio->op.opts.data_replicas; 19778c6d298aSKent Overstreet dio->op.subvol = inode->ei_subvol; 1978042a1f26SKent Overstreet dio->op.pos = POS(inode->v.i_ino, (u64) req->ki_pos >> 9); 1979042a1f26SKent Overstreet 1980042a1f26SKent Overstreet if ((req->ki_flags & IOCB_DSYNC) && 1981042a1f26SKent Overstreet !c->opts.journal_flush_disabled) 1982042a1f26SKent Overstreet dio->op.flags |= BCH_WRITE_FLUSH; 1983a6336910SKent Overstreet dio->op.flags |= BCH_WRITE_CHECK_ENOSPC; 1984042a1f26SKent Overstreet 1985042a1f26SKent Overstreet ret = bch2_disk_reservation_get(c, &dio->op.res, bio_sectors(bio), 1986042a1f26SKent Overstreet dio->op.opts.data_replicas, 0); 1987042a1f26SKent Overstreet if (unlikely(ret) && 19886fed42bbSKent Overstreet !bch2_check_range_allocated(c, inode_inum(inode), 19896fed42bbSKent Overstreet dio->op.pos.offset, bio_sectors(bio), 199035a067b4SKent Overstreet dio->op.opts.data_replicas, 199135a067b4SKent Overstreet dio->op.opts.compression != 0)) 1992042a1f26SKent Overstreet goto err; 19931c6fdbd8SKent Overstreet 19941c6fdbd8SKent Overstreet task_io_account_write(bio->bi_iter.bi_size); 19951c6fdbd8SKent Overstreet 19961c6fdbd8SKent Overstreet if (!dio->sync && !dio->loop && dio->iter.count) { 19971c6fdbd8SKent Overstreet if (bch2_dio_write_copy_iov(dio)) { 1998286d8ad0SKent Overstreet dio->sync = sync = true; 1999f8f30863SKent Overstreet goto do_io; 20001c6fdbd8SKent Overstreet } 20011c6fdbd8SKent Overstreet } 2002f8f30863SKent Overstreet do_io: 20031c6fdbd8SKent Overstreet dio->loop = true; 2004f8f30863SKent Overstreet closure_call(&dio->op.cl, bch2_write, NULL, NULL); 20051c6fdbd8SKent Overstreet 2006286d8ad0SKent Overstreet if (sync) 2007f8f30863SKent Overstreet wait_for_completion(&dio->done); 2008f8f30863SKent Overstreet else 20091c6fdbd8SKent Overstreet return -EIOCBQUEUED; 20101c6fdbd8SKent Overstreet loop: 20119a3df993SKent Overstreet i_sectors_acct(c, inode, &dio->quota_res, 20129a3df993SKent Overstreet dio->op.i_sectors_delta); 2013042a1f26SKent Overstreet req->ki_pos += (u64) dio->op.written << 9; 2014042a1f26SKent Overstreet dio->written += dio->op.written; 20159a3df993SKent Overstreet 20169a3df993SKent Overstreet spin_lock(&inode->v.i_lock); 2017042a1f26SKent Overstreet if (req->ki_pos > inode->v.i_size) 2018042a1f26SKent Overstreet i_size_write(&inode->v, req->ki_pos); 20199a3df993SKent Overstreet spin_unlock(&inode->v.i_lock); 20209a3df993SKent Overstreet 2021032ac32cSKent Overstreet bio_release_pages(bio, false); 20225468f119SKent Overstreet bio->bi_vcnt = 0; 202333c74e41SKent Overstreet 202433c74e41SKent Overstreet if (dio->op.error) { 202533c74e41SKent Overstreet set_bit(EI_INODE_ERROR, &inode->ei_flags); 202633c74e41SKent Overstreet break; 202733c74e41SKent Overstreet } 202833c74e41SKent Overstreet 202933c74e41SKent Overstreet if (!dio->iter.count) 20301c6fdbd8SKent Overstreet break; 2031f8f30863SKent Overstreet 20321c6fdbd8SKent Overstreet bio_reset(bio, NULL, REQ_OP_WRITE); 2033f8f30863SKent Overstreet reinit_completion(&dio->done); 20341c6fdbd8SKent Overstreet } 20351c6fdbd8SKent Overstreet 2036042a1f26SKent Overstreet ret = dio->op.error ?: ((long) dio->written << 9); 20371c6fdbd8SKent Overstreet err: 20381c6fdbd8SKent Overstreet bch2_pagecache_block_put(&inode->ei_pagecache_lock); 20390a426c32SKent Overstreet bch2_quota_reservation_put(c, inode, &dio->quota_res); 20401c6fdbd8SKent Overstreet 20411c6fdbd8SKent Overstreet if (dio->free_iov) 20421c6fdbd8SKent Overstreet kfree(dio->iter.__iov); 20431c6fdbd8SKent Overstreet 20445468f119SKent Overstreet bio_release_pages(bio, false); 20451c6fdbd8SKent Overstreet bio_put(bio); 20461c6fdbd8SKent Overstreet 20471c6fdbd8SKent Overstreet /* inode->i_dio_count is our ref on inode and thus bch_fs */ 20481c6fdbd8SKent Overstreet inode_dio_end(&inode->v); 20491c6fdbd8SKent Overstreet 20501c6fdbd8SKent Overstreet if (!sync) { 20511c6fdbd8SKent Overstreet req->ki_complete(req, ret); 20521c6fdbd8SKent Overstreet ret = -EIOCBQUEUED; 20531c6fdbd8SKent Overstreet } 20541c6fdbd8SKent Overstreet return ret; 20551c6fdbd8SKent Overstreet } 20561c6fdbd8SKent Overstreet 2057f8f30863SKent Overstreet static void bch2_dio_write_loop_async(struct bch_write_op *op) 20581c6fdbd8SKent Overstreet { 2059f8f30863SKent Overstreet struct dio_write *dio = container_of(op, struct dio_write, op); 20601c6fdbd8SKent Overstreet 2061f8f30863SKent Overstreet if (dio->sync) 2062f8f30863SKent Overstreet complete(&dio->done); 2063f8f30863SKent Overstreet else 20641c6fdbd8SKent Overstreet bch2_dio_write_loop(dio); 20651c6fdbd8SKent Overstreet } 20661c6fdbd8SKent Overstreet 20671c6fdbd8SKent Overstreet static noinline 20681c6fdbd8SKent Overstreet ssize_t bch2_direct_write(struct kiocb *req, struct iov_iter *iter) 20691c6fdbd8SKent Overstreet { 20701c6fdbd8SKent Overstreet struct file *file = req->ki_filp; 207154847d25SKent Overstreet struct address_space *mapping = file->f_mapping; 20721c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 20731c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 20741c6fdbd8SKent Overstreet struct dio_write *dio; 20751c6fdbd8SKent Overstreet struct bio *bio; 20767edcfbfeSKent Overstreet bool locked = true, extending; 20771c6fdbd8SKent Overstreet ssize_t ret; 20781c6fdbd8SKent Overstreet 20797edcfbfeSKent Overstreet prefetch(&c->opts); 20807edcfbfeSKent Overstreet prefetch((void *) &c->opts + 64); 20817edcfbfeSKent Overstreet prefetch(&inode->ei_inode); 20827edcfbfeSKent Overstreet prefetch((void *) &inode->ei_inode + 64); 20831c6fdbd8SKent Overstreet 20847edcfbfeSKent Overstreet inode_lock(&inode->v); 20857edcfbfeSKent Overstreet 20867edcfbfeSKent Overstreet ret = generic_write_checks(req, iter); 20877edcfbfeSKent Overstreet if (unlikely(ret <= 0)) 20887edcfbfeSKent Overstreet goto err; 20897edcfbfeSKent Overstreet 20907edcfbfeSKent Overstreet ret = file_remove_privs(file); 20917edcfbfeSKent Overstreet if (unlikely(ret)) 20927edcfbfeSKent Overstreet goto err; 20937edcfbfeSKent Overstreet 20947edcfbfeSKent Overstreet ret = file_update_time(file); 20957edcfbfeSKent Overstreet if (unlikely(ret)) 20967edcfbfeSKent Overstreet goto err; 20971c6fdbd8SKent Overstreet 2098919dbbd1SKent Overstreet if (unlikely((req->ki_pos|iter->count) & (block_bytes(c) - 1))) 20997edcfbfeSKent Overstreet goto err; 21007edcfbfeSKent Overstreet 21017edcfbfeSKent Overstreet inode_dio_begin(&inode->v); 21027edcfbfeSKent Overstreet bch2_pagecache_block_get(&inode->ei_pagecache_lock); 21037edcfbfeSKent Overstreet 21047edcfbfeSKent Overstreet extending = req->ki_pos + iter->count > inode->v.i_size; 21057edcfbfeSKent Overstreet if (!extending) { 21067edcfbfeSKent Overstreet inode_unlock(&inode->v); 21077edcfbfeSKent Overstreet locked = false; 21087edcfbfeSKent Overstreet } 21091c6fdbd8SKent Overstreet 21101c6fdbd8SKent Overstreet bio = bio_alloc_bioset(NULL, 21112ed5cd50SKent Overstreet iov_iter_is_bvec(iter) 21122ed5cd50SKent Overstreet ? 0 21132ed5cd50SKent Overstreet : iov_iter_npages(iter, BIO_MAX_VECS), 21141c6fdbd8SKent Overstreet REQ_OP_WRITE, 21151c6fdbd8SKent Overstreet GFP_KERNEL, 21161c6fdbd8SKent Overstreet &c->dio_write_bioset); 21179a3df993SKent Overstreet dio = container_of(bio, struct dio_write, op.wbio.bio); 2118f8f30863SKent Overstreet init_completion(&dio->done); 21191c6fdbd8SKent Overstreet dio->req = req; 2120ed484030SKent Overstreet dio->mm = current->mm; 21211c6fdbd8SKent Overstreet dio->loop = false; 21227edcfbfeSKent Overstreet dio->sync = is_sync_kiocb(req) || extending; 21231c6fdbd8SKent Overstreet dio->free_iov = false; 21241c6fdbd8SKent Overstreet dio->quota_res.sectors = 0; 2125042a1f26SKent Overstreet dio->written = 0; 21261c6fdbd8SKent Overstreet dio->iter = *iter; 21279a3df993SKent Overstreet 21281c6fdbd8SKent Overstreet ret = bch2_quota_reservation_add(c, inode, &dio->quota_res, 21291c6fdbd8SKent Overstreet iter->count >> 9, true); 21301c6fdbd8SKent Overstreet if (unlikely(ret)) 21317edcfbfeSKent Overstreet goto err_put_bio; 21321c6fdbd8SKent Overstreet 2133a023127aSKent Overstreet if (unlikely(mapping->nrpages)) { 213454847d25SKent Overstreet ret = write_invalidate_inode_pages_range(mapping, 213554847d25SKent Overstreet req->ki_pos, 213654847d25SKent Overstreet req->ki_pos + iter->count - 1); 213754847d25SKent Overstreet if (unlikely(ret)) 213854847d25SKent Overstreet goto err_put_bio; 2139a023127aSKent Overstreet } 214054847d25SKent Overstreet 21417edcfbfeSKent Overstreet ret = bch2_dio_write_loop(dio); 21421c6fdbd8SKent Overstreet err: 21437edcfbfeSKent Overstreet if (locked) 21447edcfbfeSKent Overstreet inode_unlock(&inode->v); 21457edcfbfeSKent Overstreet return ret; 21467edcfbfeSKent Overstreet err_put_bio: 21477edcfbfeSKent Overstreet bch2_pagecache_block_put(&inode->ei_pagecache_lock); 21481c6fdbd8SKent Overstreet bch2_quota_reservation_put(c, inode, &dio->quota_res); 21491c6fdbd8SKent Overstreet bio_put(bio); 21507edcfbfeSKent Overstreet inode_dio_end(&inode->v); 21517edcfbfeSKent Overstreet goto err; 21521c6fdbd8SKent Overstreet } 21531c6fdbd8SKent Overstreet 21547edcfbfeSKent Overstreet ssize_t bch2_write_iter(struct kiocb *iocb, struct iov_iter *from) 21551c6fdbd8SKent Overstreet { 21561c6fdbd8SKent Overstreet struct file *file = iocb->ki_filp; 21577edcfbfeSKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 21581c6fdbd8SKent Overstreet ssize_t ret; 21591c6fdbd8SKent Overstreet 21601c6fdbd8SKent Overstreet if (iocb->ki_flags & IOCB_DIRECT) 21611c6fdbd8SKent Overstreet return bch2_direct_write(iocb, from); 21621c6fdbd8SKent Overstreet 21637edcfbfeSKent Overstreet inode_lock(&inode->v); 21647edcfbfeSKent Overstreet 21657edcfbfeSKent Overstreet ret = generic_write_checks(iocb, from); 21667edcfbfeSKent Overstreet if (ret <= 0) 21677edcfbfeSKent Overstreet goto unlock; 21687edcfbfeSKent Overstreet 21691c6fdbd8SKent Overstreet ret = file_remove_privs(file); 21701c6fdbd8SKent Overstreet if (ret) 21717edcfbfeSKent Overstreet goto unlock; 21721c6fdbd8SKent Overstreet 21731c6fdbd8SKent Overstreet ret = file_update_time(file); 21741c6fdbd8SKent Overstreet if (ret) 21757edcfbfeSKent Overstreet goto unlock; 21761c6fdbd8SKent Overstreet 21777edcfbfeSKent Overstreet ret = bch2_buffered_write(iocb, from); 21781c6fdbd8SKent Overstreet if (likely(ret > 0)) 21791c6fdbd8SKent Overstreet iocb->ki_pos += ret; 21807edcfbfeSKent Overstreet unlock: 21811c6fdbd8SKent Overstreet inode_unlock(&inode->v); 21821c6fdbd8SKent Overstreet 21837edcfbfeSKent Overstreet if (ret > 0) 21841c6fdbd8SKent Overstreet ret = generic_write_sync(iocb, ret); 21851c6fdbd8SKent Overstreet 21861c6fdbd8SKent Overstreet return ret; 21871c6fdbd8SKent Overstreet } 21881c6fdbd8SKent Overstreet 21891c6fdbd8SKent Overstreet /* fsync: */ 21901c6fdbd8SKent Overstreet 219168a2054dSKent Overstreet /* 219268a2054dSKent Overstreet * inode->ei_inode.bi_journal_seq won't be up to date since it's set in an 219368a2054dSKent Overstreet * insert trigger: look up the btree inode instead 219468a2054dSKent Overstreet */ 219568a2054dSKent Overstreet static int bch2_flush_inode(struct bch_fs *c, subvol_inum inum) 219668a2054dSKent Overstreet { 219768a2054dSKent Overstreet struct bch_inode_unpacked inode; 219868a2054dSKent Overstreet int ret; 219968a2054dSKent Overstreet 220068a2054dSKent Overstreet if (c->opts.journal_flush_disabled) 220168a2054dSKent Overstreet return 0; 220268a2054dSKent Overstreet 220368a2054dSKent Overstreet ret = bch2_inode_find_by_inum(c, inum, &inode); 220468a2054dSKent Overstreet if (ret) 220568a2054dSKent Overstreet return ret; 220668a2054dSKent Overstreet 220768a2054dSKent Overstreet return bch2_journal_flush_seq(&c->journal, inode.bi_journal_seq); 220868a2054dSKent Overstreet } 220968a2054dSKent Overstreet 22101c6fdbd8SKent Overstreet int bch2_fsync(struct file *file, loff_t start, loff_t end, int datasync) 22111c6fdbd8SKent Overstreet { 22121c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 22131c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 221468a2054dSKent Overstreet int ret, ret2, ret3; 22151c6fdbd8SKent Overstreet 22161c6fdbd8SKent Overstreet ret = file_write_and_wait_range(file, start, end); 221768a2054dSKent Overstreet ret2 = sync_inode_metadata(&inode->v, 1); 221868a2054dSKent Overstreet ret3 = bch2_flush_inode(c, inode_inum(inode)); 22191c6fdbd8SKent Overstreet 222068a2054dSKent Overstreet return ret ?: ret2 ?: ret3; 22211c6fdbd8SKent Overstreet } 22221c6fdbd8SKent Overstreet 22231c6fdbd8SKent Overstreet /* truncate: */ 22241c6fdbd8SKent Overstreet 22256fed42bbSKent Overstreet static inline int range_has_data(struct bch_fs *c, u32 subvol, 22261c6fdbd8SKent Overstreet struct bpos start, 22271c6fdbd8SKent Overstreet struct bpos end) 22281c6fdbd8SKent Overstreet { 2229424eb881SKent Overstreet struct btree_trans trans; 223067e0dd8fSKent Overstreet struct btree_iter iter; 22311c6fdbd8SKent Overstreet struct bkey_s_c k; 22321c6fdbd8SKent Overstreet int ret = 0; 22331c6fdbd8SKent Overstreet 223420bceecbSKent Overstreet bch2_trans_init(&trans, c, 0, 0); 22356fed42bbSKent Overstreet retry: 22366fed42bbSKent Overstreet bch2_trans_begin(&trans); 22376fed42bbSKent Overstreet 22386fed42bbSKent Overstreet ret = bch2_subvolume_get_snapshot(&trans, subvol, &start.snapshot); 22396fed42bbSKent Overstreet if (ret) 22406fed42bbSKent Overstreet goto err; 2241424eb881SKent Overstreet 2242e5fa91d7SKent Overstreet for_each_btree_key_norestart(&trans, iter, BTREE_ID_extents, start, 0, k, ret) { 22431c6fdbd8SKent Overstreet if (bkey_cmp(bkey_start_pos(k.k), end) >= 0) 22441c6fdbd8SKent Overstreet break; 22451c6fdbd8SKent Overstreet 22461c6fdbd8SKent Overstreet if (bkey_extent_is_data(k.k)) { 22471c6fdbd8SKent Overstreet ret = 1; 22481c6fdbd8SKent Overstreet break; 22491c6fdbd8SKent Overstreet } 22501c6fdbd8SKent Overstreet } 22516fed42bbSKent Overstreet start = iter.pos; 225267e0dd8fSKent Overstreet bch2_trans_iter_exit(&trans, &iter); 22536fed42bbSKent Overstreet err: 22546fed42bbSKent Overstreet if (ret == -EINTR) 22556fed42bbSKent Overstreet goto retry; 22561c6fdbd8SKent Overstreet 22579a796fdbSKent Overstreet bch2_trans_exit(&trans); 22589a796fdbSKent Overstreet return ret; 22591c6fdbd8SKent Overstreet } 22601c6fdbd8SKent Overstreet 22611c6fdbd8SKent Overstreet static int __bch2_truncate_page(struct bch_inode_info *inode, 22621c6fdbd8SKent Overstreet pgoff_t index, loff_t start, loff_t end) 22631c6fdbd8SKent Overstreet { 22641c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 22651c6fdbd8SKent Overstreet struct address_space *mapping = inode->v.i_mapping; 2266a99b1cafSKent Overstreet struct bch_page_state *s; 22671c6fdbd8SKent Overstreet unsigned start_offset = start & (PAGE_SIZE - 1); 22681c6fdbd8SKent Overstreet unsigned end_offset = ((end - 1) & (PAGE_SIZE - 1)) + 1; 2269a99b1cafSKent Overstreet unsigned i; 22701c6fdbd8SKent Overstreet struct page *page; 2271b19d307dSKent Overstreet s64 i_sectors_delta = 0; 22721c6fdbd8SKent Overstreet int ret = 0; 22731c6fdbd8SKent Overstreet 22741c6fdbd8SKent Overstreet /* Page boundary? Nothing to do */ 22751c6fdbd8SKent Overstreet if (!((index == start >> PAGE_SHIFT && start_offset) || 22761c6fdbd8SKent Overstreet (index == end >> PAGE_SHIFT && end_offset != PAGE_SIZE))) 22771c6fdbd8SKent Overstreet return 0; 22781c6fdbd8SKent Overstreet 22791c6fdbd8SKent Overstreet /* Above i_size? */ 22801c6fdbd8SKent Overstreet if (index << PAGE_SHIFT >= inode->v.i_size) 22811c6fdbd8SKent Overstreet return 0; 22821c6fdbd8SKent Overstreet 22831c6fdbd8SKent Overstreet page = find_lock_page(mapping, index); 22841c6fdbd8SKent Overstreet if (!page) { 22851c6fdbd8SKent Overstreet /* 22861c6fdbd8SKent Overstreet * XXX: we're doing two index lookups when we end up reading the 22871c6fdbd8SKent Overstreet * page 22881c6fdbd8SKent Overstreet */ 22896fed42bbSKent Overstreet ret = range_has_data(c, inode->ei_subvol, 2290*7279c1a2SKent Overstreet POS(inode->v.i_ino, index << PAGE_SECTORS_SHIFT), 2291*7279c1a2SKent Overstreet POS(inode->v.i_ino, (index + 1) << PAGE_SECTORS_SHIFT)); 22921c6fdbd8SKent Overstreet if (ret <= 0) 22931c6fdbd8SKent Overstreet return ret; 22941c6fdbd8SKent Overstreet 22951c6fdbd8SKent Overstreet page = find_or_create_page(mapping, index, GFP_KERNEL); 22961c6fdbd8SKent Overstreet if (unlikely(!page)) { 22971c6fdbd8SKent Overstreet ret = -ENOMEM; 22981c6fdbd8SKent Overstreet goto out; 22991c6fdbd8SKent Overstreet } 23001c6fdbd8SKent Overstreet } 23011c6fdbd8SKent Overstreet 2302a99b1cafSKent Overstreet s = bch2_page_state_create(page, 0); 2303a99b1cafSKent Overstreet if (!s) { 2304a99b1cafSKent Overstreet ret = -ENOMEM; 2305a99b1cafSKent Overstreet goto unlock; 2306a99b1cafSKent Overstreet } 2307a99b1cafSKent Overstreet 23081c6fdbd8SKent Overstreet if (!PageUptodate(page)) { 23091c6fdbd8SKent Overstreet ret = bch2_read_single_page(page, mapping); 23101c6fdbd8SKent Overstreet if (ret) 23111c6fdbd8SKent Overstreet goto unlock; 23121c6fdbd8SKent Overstreet } 23131c6fdbd8SKent Overstreet 2314a99b1cafSKent Overstreet if (index != start >> PAGE_SHIFT) 2315a99b1cafSKent Overstreet start_offset = 0; 2316a99b1cafSKent Overstreet if (index != end >> PAGE_SHIFT) 2317a99b1cafSKent Overstreet end_offset = PAGE_SIZE; 2318a99b1cafSKent Overstreet 2319a99b1cafSKent Overstreet for (i = round_up(start_offset, block_bytes(c)) >> 9; 2320a99b1cafSKent Overstreet i < round_down(end_offset, block_bytes(c)) >> 9; 2321a99b1cafSKent Overstreet i++) { 2322a99b1cafSKent Overstreet s->s[i].nr_replicas = 0; 2323b19d307dSKent Overstreet if (s->s[i].state == SECTOR_DIRTY) 2324b19d307dSKent Overstreet i_sectors_delta--; 2325a99b1cafSKent Overstreet s->s[i].state = SECTOR_UNALLOCATED; 2326a99b1cafSKent Overstreet } 2327a99b1cafSKent Overstreet 2328b19d307dSKent Overstreet i_sectors_acct(c, inode, NULL, i_sectors_delta); 2329b19d307dSKent Overstreet 233074163da7SKent Overstreet /* 233174163da7SKent Overstreet * Caller needs to know whether this page will be written out by 233274163da7SKent Overstreet * writeback - doing an i_size update if necessary - or whether it will 233374163da7SKent Overstreet * be responsible for the i_size update: 233474163da7SKent Overstreet */ 233574163da7SKent Overstreet ret = s->s[(min_t(u64, inode->v.i_size - (index << PAGE_SHIFT), 233674163da7SKent Overstreet PAGE_SIZE) - 1) >> 9].state >= SECTOR_DIRTY; 233774163da7SKent Overstreet 2338a99b1cafSKent Overstreet zero_user_segment(page, start_offset, end_offset); 2339a99b1cafSKent Overstreet 23401c6fdbd8SKent Overstreet /* 23411c6fdbd8SKent Overstreet * Bit of a hack - we don't want truncate to fail due to -ENOSPC. 23421c6fdbd8SKent Overstreet * 23431c6fdbd8SKent Overstreet * XXX: because we aren't currently tracking whether the page has actual 23441c6fdbd8SKent Overstreet * data in it (vs. just 0s, or only partially written) this wrong. ick. 23451c6fdbd8SKent Overstreet */ 234674163da7SKent Overstreet BUG_ON(bch2_get_page_disk_reservation(c, inode, page, false)); 23471c6fdbd8SKent Overstreet 23489ba2eb25SKent Overstreet /* 23499ba2eb25SKent Overstreet * This removes any writeable userspace mappings; we need to force 23509ba2eb25SKent Overstreet * .page_mkwrite to be called again before any mmapped writes, to 23519ba2eb25SKent Overstreet * redirty the full page: 23529ba2eb25SKent Overstreet */ 23539ba2eb25SKent Overstreet page_mkclean(page); 2354d1542e03SKent Overstreet filemap_dirty_folio(mapping, page_folio(page)); 23551c6fdbd8SKent Overstreet unlock: 23561c6fdbd8SKent Overstreet unlock_page(page); 23571c6fdbd8SKent Overstreet put_page(page); 23581c6fdbd8SKent Overstreet out: 23591c6fdbd8SKent Overstreet return ret; 23601c6fdbd8SKent Overstreet } 23611c6fdbd8SKent Overstreet 23621c6fdbd8SKent Overstreet static int bch2_truncate_page(struct bch_inode_info *inode, loff_t from) 23631c6fdbd8SKent Overstreet { 23641c6fdbd8SKent Overstreet return __bch2_truncate_page(inode, from >> PAGE_SHIFT, 2365a99b1cafSKent Overstreet from, round_up(from, PAGE_SIZE)); 23661c6fdbd8SKent Overstreet } 23671c6fdbd8SKent Overstreet 236874163da7SKent Overstreet static int bch2_truncate_pages(struct bch_inode_info *inode, 236974163da7SKent Overstreet loff_t start, loff_t end) 237074163da7SKent Overstreet { 237174163da7SKent Overstreet int ret = __bch2_truncate_page(inode, start >> PAGE_SHIFT, 237274163da7SKent Overstreet start, end); 237374163da7SKent Overstreet 237474163da7SKent Overstreet if (ret >= 0 && 237574163da7SKent Overstreet start >> PAGE_SHIFT != end >> PAGE_SHIFT) 237674163da7SKent Overstreet ret = __bch2_truncate_page(inode, 237774163da7SKent Overstreet end >> PAGE_SHIFT, 237874163da7SKent Overstreet start, end); 237974163da7SKent Overstreet return ret; 238074163da7SKent Overstreet } 238174163da7SKent Overstreet 238268a507a2SKent Overstreet static int bch2_extend(struct mnt_idmap *idmap, 238368a507a2SKent Overstreet struct bch_inode_info *inode, 2384e0541a93SKent Overstreet struct bch_inode_unpacked *inode_u, 2385e0541a93SKent Overstreet struct iattr *iattr) 23861c6fdbd8SKent Overstreet { 23871c6fdbd8SKent Overstreet struct address_space *mapping = inode->v.i_mapping; 23881c6fdbd8SKent Overstreet int ret; 23891c6fdbd8SKent Overstreet 2390e0541a93SKent Overstreet /* 2391e0541a93SKent Overstreet * sync appends: 23922925fc49SKent Overstreet * 23932925fc49SKent Overstreet * this has to be done _before_ extending i_size: 2394e0541a93SKent Overstreet */ 2395e0541a93SKent Overstreet ret = filemap_write_and_wait_range(mapping, inode_u->bi_size, S64_MAX); 23961c6fdbd8SKent Overstreet if (ret) 23971c6fdbd8SKent Overstreet return ret; 23981c6fdbd8SKent Overstreet 23991c6fdbd8SKent Overstreet truncate_setsize(&inode->v, iattr->ia_size); 24001c6fdbd8SKent Overstreet 240168a507a2SKent Overstreet return bch2_setattr_nonsize(idmap, inode, iattr); 24021c6fdbd8SKent Overstreet } 24031c6fdbd8SKent Overstreet 240454e2264eSKent Overstreet static int bch2_truncate_finish_fn(struct bch_inode_info *inode, 240554e2264eSKent Overstreet struct bch_inode_unpacked *bi, 240654e2264eSKent Overstreet void *p) 240754e2264eSKent Overstreet { 240854e2264eSKent Overstreet bi->bi_flags &= ~BCH_INODE_I_SIZE_DIRTY; 240954e2264eSKent Overstreet return 0; 241054e2264eSKent Overstreet } 241154e2264eSKent Overstreet 241254e2264eSKent Overstreet static int bch2_truncate_start_fn(struct bch_inode_info *inode, 241354e2264eSKent Overstreet struct bch_inode_unpacked *bi, void *p) 241454e2264eSKent Overstreet { 241554e2264eSKent Overstreet u64 *new_i_size = p; 241654e2264eSKent Overstreet 241754e2264eSKent Overstreet bi->bi_flags |= BCH_INODE_I_SIZE_DIRTY; 241854e2264eSKent Overstreet bi->bi_size = *new_i_size; 241954e2264eSKent Overstreet return 0; 242054e2264eSKent Overstreet } 242154e2264eSKent Overstreet 242268a507a2SKent Overstreet int bch2_truncate(struct mnt_idmap *idmap, 242368a507a2SKent Overstreet struct bch_inode_info *inode, struct iattr *iattr) 24241c6fdbd8SKent Overstreet { 24251c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 24261c6fdbd8SKent Overstreet struct address_space *mapping = inode->v.i_mapping; 2427e0541a93SKent Overstreet struct bch_inode_unpacked inode_u; 242854e2264eSKent Overstreet u64 new_i_size = iattr->ia_size; 24292e87eae1SKent Overstreet s64 i_sectors_delta = 0; 24301c6fdbd8SKent Overstreet int ret = 0; 24311c6fdbd8SKent Overstreet 243268a507a2SKent Overstreet /* 243378d66ab1SDan Robertson * If the truncate call with change the size of the file, the 243478d66ab1SDan Robertson * cmtimes should be updated. If the size will not change, we 243578d66ab1SDan Robertson * do not need to update the cmtimes. 243668a507a2SKent Overstreet */ 243778d66ab1SDan Robertson if (iattr->ia_size != inode->v.i_size) { 243868a507a2SKent Overstreet if (!(iattr->ia_valid & ATTR_MTIME)) 243968a507a2SKent Overstreet ktime_get_coarse_real_ts64(&iattr->ia_mtime); 244068a507a2SKent Overstreet if (!(iattr->ia_valid & ATTR_CTIME)) 244168a507a2SKent Overstreet ktime_get_coarse_real_ts64(&iattr->ia_ctime); 244268a507a2SKent Overstreet iattr->ia_valid |= ATTR_MTIME|ATTR_CTIME; 244378d66ab1SDan Robertson } 244468a507a2SKent Overstreet 24451c6fdbd8SKent Overstreet inode_dio_wait(&inode->v); 24461c6fdbd8SKent Overstreet bch2_pagecache_block_get(&inode->ei_pagecache_lock); 24471c6fdbd8SKent Overstreet 24486fed42bbSKent Overstreet ret = bch2_inode_find_by_inum(c, inode_inum(inode), &inode_u); 2449e0541a93SKent Overstreet if (ret) 2450e0541a93SKent Overstreet goto err; 24511c6fdbd8SKent Overstreet 2452c45d473dSKent Overstreet /* 2453c45d473dSKent Overstreet * check this before next assertion; on filesystem error our normal 2454c45d473dSKent Overstreet * invariants are a bit broken (truncate has to truncate the page cache 2455c45d473dSKent Overstreet * before the inode). 2456c45d473dSKent Overstreet */ 2457c45d473dSKent Overstreet ret = bch2_journal_error(&c->journal); 2458c45d473dSKent Overstreet if (ret) 2459c45d473dSKent Overstreet goto err; 2460c45d473dSKent Overstreet 246133c74e41SKent Overstreet WARN_ON(!test_bit(EI_INODE_ERROR, &inode->ei_flags) && 246233c74e41SKent Overstreet inode->v.i_size < inode_u.bi_size); 2463e0541a93SKent Overstreet 2464e0541a93SKent Overstreet if (iattr->ia_size > inode->v.i_size) { 246568a507a2SKent Overstreet ret = bch2_extend(idmap, inode, &inode_u, iattr); 246654e2264eSKent Overstreet goto err; 24671c6fdbd8SKent Overstreet } 24681c6fdbd8SKent Overstreet 246968a507a2SKent Overstreet iattr->ia_valid &= ~ATTR_SIZE; 247068a507a2SKent Overstreet 24711c6fdbd8SKent Overstreet ret = bch2_truncate_page(inode, iattr->ia_size); 247274163da7SKent Overstreet if (unlikely(ret < 0)) 247354e2264eSKent Overstreet goto err; 24741c6fdbd8SKent Overstreet 24756cc3535dSKent Overstreet /* 24766cc3535dSKent Overstreet * When extending, we're going to write the new i_size to disk 24776cc3535dSKent Overstreet * immediately so we need to flush anything above the current on disk 24786cc3535dSKent Overstreet * i_size first: 24796cc3535dSKent Overstreet * 24806cc3535dSKent Overstreet * Also, when extending we need to flush the page that i_size currently 24816cc3535dSKent Overstreet * straddles - if it's mapped to userspace, we need to ensure that 24826cc3535dSKent Overstreet * userspace has to redirty it and call .mkwrite -> set_page_dirty 24836cc3535dSKent Overstreet * again to allocate the part of the page that was extended. 24846cc3535dSKent Overstreet */ 2485e0541a93SKent Overstreet if (iattr->ia_size > inode_u.bi_size) 24861c6fdbd8SKent Overstreet ret = filemap_write_and_wait_range(mapping, 2487e0541a93SKent Overstreet inode_u.bi_size, 24881c6fdbd8SKent Overstreet iattr->ia_size - 1); 24891c6fdbd8SKent Overstreet else if (iattr->ia_size & (PAGE_SIZE - 1)) 24901c6fdbd8SKent Overstreet ret = filemap_write_and_wait_range(mapping, 24911c6fdbd8SKent Overstreet round_down(iattr->ia_size, PAGE_SIZE), 24921c6fdbd8SKent Overstreet iattr->ia_size - 1); 24931c6fdbd8SKent Overstreet if (ret) 249454e2264eSKent Overstreet goto err; 24951c6fdbd8SKent Overstreet 249654e2264eSKent Overstreet mutex_lock(&inode->ei_update_lock); 249754e2264eSKent Overstreet ret = bch2_write_inode(c, inode, bch2_truncate_start_fn, 249854e2264eSKent Overstreet &new_i_size, 0); 249954e2264eSKent Overstreet mutex_unlock(&inode->ei_update_lock); 25001c6fdbd8SKent Overstreet 25011c6fdbd8SKent Overstreet if (unlikely(ret)) 250254e2264eSKent Overstreet goto err; 25031c6fdbd8SKent Overstreet 25041c6fdbd8SKent Overstreet truncate_setsize(&inode->v, iattr->ia_size); 25051c6fdbd8SKent Overstreet 25068c6d298aSKent Overstreet ret = bch2_fpunch(c, inode_inum(inode), 2507a99b1cafSKent Overstreet round_up(iattr->ia_size, block_bytes(c)) >> 9, 250868a2054dSKent Overstreet U64_MAX, &i_sectors_delta); 25092e87eae1SKent Overstreet i_sectors_acct(c, inode, NULL, i_sectors_delta); 25102e87eae1SKent Overstreet 25111c6fdbd8SKent Overstreet if (unlikely(ret)) 251254e2264eSKent Overstreet goto err; 25131c6fdbd8SKent Overstreet 251454e2264eSKent Overstreet mutex_lock(&inode->ei_update_lock); 251568a507a2SKent Overstreet ret = bch2_write_inode(c, inode, bch2_truncate_finish_fn, NULL, 0); 251654e2264eSKent Overstreet mutex_unlock(&inode->ei_update_lock); 251768a507a2SKent Overstreet 251868a507a2SKent Overstreet ret = bch2_setattr_nonsize(idmap, inode, iattr); 251954e2264eSKent Overstreet err: 25201c6fdbd8SKent Overstreet bch2_pagecache_block_put(&inode->ei_pagecache_lock); 25211c6fdbd8SKent Overstreet return ret; 25221c6fdbd8SKent Overstreet } 25231c6fdbd8SKent Overstreet 25241c6fdbd8SKent Overstreet /* fallocate: */ 25251c6fdbd8SKent Overstreet 2526050197b1SKent Overstreet static int inode_update_times_fn(struct bch_inode_info *inode, 2527050197b1SKent Overstreet struct bch_inode_unpacked *bi, void *p) 2528050197b1SKent Overstreet { 2529050197b1SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 2530050197b1SKent Overstreet 2531050197b1SKent Overstreet bi->bi_mtime = bi->bi_ctime = bch2_current_time(c); 2532050197b1SKent Overstreet return 0; 2533050197b1SKent Overstreet } 2534050197b1SKent Overstreet 25352e87eae1SKent Overstreet static long bchfs_fpunch(struct bch_inode_info *inode, loff_t offset, loff_t len) 25361c6fdbd8SKent Overstreet { 25371c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 253874163da7SKent Overstreet u64 end = offset + len; 253974163da7SKent Overstreet u64 block_start = round_up(offset, block_bytes(c)); 254074163da7SKent Overstreet u64 block_end = round_down(end, block_bytes(c)); 254174163da7SKent Overstreet bool truncated_last_page; 25421c6fdbd8SKent Overstreet int ret = 0; 25431c6fdbd8SKent Overstreet 254474163da7SKent Overstreet ret = bch2_truncate_pages(inode, offset, end); 254574163da7SKent Overstreet if (unlikely(ret < 0)) 25461c6fdbd8SKent Overstreet goto err; 25471c6fdbd8SKent Overstreet 254874163da7SKent Overstreet truncated_last_page = ret; 25491c6fdbd8SKent Overstreet 255074163da7SKent Overstreet truncate_pagecache_range(&inode->v, offset, end - 1); 25511c6fdbd8SKent Overstreet 255274163da7SKent Overstreet if (block_start < block_end ) { 25532e87eae1SKent Overstreet s64 i_sectors_delta = 0; 25542e87eae1SKent Overstreet 25558c6d298aSKent Overstreet ret = bch2_fpunch(c, inode_inum(inode), 255674163da7SKent Overstreet block_start >> 9, block_end >> 9, 25572e87eae1SKent Overstreet &i_sectors_delta); 25582e87eae1SKent Overstreet i_sectors_acct(c, inode, NULL, i_sectors_delta); 25592e87eae1SKent Overstreet } 2560050197b1SKent Overstreet 2561050197b1SKent Overstreet mutex_lock(&inode->ei_update_lock); 256274163da7SKent Overstreet if (end >= inode->v.i_size && !truncated_last_page) { 256374163da7SKent Overstreet ret = bch2_write_inode_size(c, inode, inode->v.i_size, 256474163da7SKent Overstreet ATTR_MTIME|ATTR_CTIME); 256574163da7SKent Overstreet } else { 2566050197b1SKent Overstreet ret = bch2_write_inode(c, inode, inode_update_times_fn, NULL, 256774163da7SKent Overstreet ATTR_MTIME|ATTR_CTIME); 256874163da7SKent Overstreet } 2569050197b1SKent Overstreet mutex_unlock(&inode->ei_update_lock); 25701c6fdbd8SKent Overstreet err: 25711c6fdbd8SKent Overstreet return ret; 25721c6fdbd8SKent Overstreet } 25731c6fdbd8SKent Overstreet 25742e87eae1SKent Overstreet static long bchfs_fcollapse_finsert(struct bch_inode_info *inode, 25755f786787SKent Overstreet loff_t offset, loff_t len, 25765f786787SKent Overstreet bool insert) 25771c6fdbd8SKent Overstreet { 25781c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 25791c6fdbd8SKent Overstreet struct address_space *mapping = inode->v.i_mapping; 258007a1006aSKent Overstreet struct bkey_buf copy; 2581d69f41d6SKent Overstreet struct btree_trans trans; 258267e0dd8fSKent Overstreet struct btree_iter src, dst, del; 25835f786787SKent Overstreet loff_t shift, new_size; 25845f786787SKent Overstreet u64 src_start; 258550dc0f69SKent Overstreet int ret = 0; 25861c6fdbd8SKent Overstreet 25871c6fdbd8SKent Overstreet if ((offset | len) & (block_bytes(c) - 1)) 25881c6fdbd8SKent Overstreet return -EINVAL; 25891c6fdbd8SKent Overstreet 25905f786787SKent Overstreet if (insert) { 25915f786787SKent Overstreet if (inode->v.i_sb->s_maxbytes - inode->v.i_size < len) 259274163da7SKent Overstreet return -EFBIG; 25935f786787SKent Overstreet 25945f786787SKent Overstreet if (offset >= inode->v.i_size) 259574163da7SKent Overstreet return -EINVAL; 25965f786787SKent Overstreet 25975f786787SKent Overstreet src_start = U64_MAX; 25985f786787SKent Overstreet shift = len; 25995f786787SKent Overstreet } else { 26001c6fdbd8SKent Overstreet if (offset + len >= inode->v.i_size) 260174163da7SKent Overstreet return -EINVAL; 26021c6fdbd8SKent Overstreet 26035f786787SKent Overstreet src_start = offset + len; 26045f786787SKent Overstreet shift = -len; 26055f786787SKent Overstreet } 26061c6fdbd8SKent Overstreet 26075f786787SKent Overstreet new_size = inode->v.i_size + shift; 26081c6fdbd8SKent Overstreet 26091c6fdbd8SKent Overstreet ret = write_invalidate_inode_pages_range(mapping, offset, LLONG_MAX); 26101c6fdbd8SKent Overstreet if (ret) 261174163da7SKent Overstreet return ret; 26121c6fdbd8SKent Overstreet 26135f786787SKent Overstreet if (insert) { 26145f786787SKent Overstreet i_size_write(&inode->v, new_size); 26155f786787SKent Overstreet mutex_lock(&inode->ei_update_lock); 26165f786787SKent Overstreet ret = bch2_write_inode_size(c, inode, new_size, 26175f786787SKent Overstreet ATTR_MTIME|ATTR_CTIME); 26185f786787SKent Overstreet mutex_unlock(&inode->ei_update_lock); 26195f786787SKent Overstreet } else { 26202e87eae1SKent Overstreet s64 i_sectors_delta = 0; 26212e87eae1SKent Overstreet 26228c6d298aSKent Overstreet ret = bch2_fpunch(c, inode_inum(inode), 26232e87eae1SKent Overstreet offset >> 9, (offset + len) >> 9, 26242e87eae1SKent Overstreet &i_sectors_delta); 26252e87eae1SKent Overstreet i_sectors_acct(c, inode, NULL, i_sectors_delta); 26262e87eae1SKent Overstreet 262763095894SKent Overstreet if (ret) 262874163da7SKent Overstreet return ret; 26295f786787SKent Overstreet } 26308ef231bdSKent Overstreet 263150dc0f69SKent Overstreet bch2_bkey_buf_init(©); 2632f7beb4caSKent Overstreet bch2_trans_init(&trans, c, BTREE_ITER_MAX, 1024); 263367e0dd8fSKent Overstreet bch2_trans_iter_init(&trans, &src, BTREE_ID_extents, 26345f786787SKent Overstreet POS(inode->v.i_ino, src_start >> 9), 263563095894SKent Overstreet BTREE_ITER_INTENT); 263667e0dd8fSKent Overstreet bch2_trans_copy_iter(&dst, &src); 263767e0dd8fSKent Overstreet bch2_trans_copy_iter(&del, &src); 26385f786787SKent Overstreet 263950dc0f69SKent Overstreet while (ret == 0 || ret == -EINTR) { 264063095894SKent Overstreet struct disk_reservation disk_res = 264163095894SKent Overstreet bch2_disk_reservation_init(c, 0); 264263095894SKent Overstreet struct bkey_i delete; 264363095894SKent Overstreet struct bkey_s_c k; 264463095894SKent Overstreet struct bpos next_pos; 26455f786787SKent Overstreet struct bpos move_pos = POS(inode->v.i_ino, offset >> 9); 26465f786787SKent Overstreet struct bpos atomic_end; 26472d594dfbSKent Overstreet unsigned trigger_flags = 0; 26486fed42bbSKent Overstreet u32 snapshot; 26496fed42bbSKent Overstreet 26506fed42bbSKent Overstreet bch2_trans_begin(&trans); 26516fed42bbSKent Overstreet 26526fed42bbSKent Overstreet ret = bch2_subvolume_get_snapshot(&trans, 26536fed42bbSKent Overstreet inode->ei_subvol, &snapshot); 26546fed42bbSKent Overstreet if (ret) 26556fed42bbSKent Overstreet continue; 26566fed42bbSKent Overstreet 26576fed42bbSKent Overstreet bch2_btree_iter_set_snapshot(&src, snapshot); 26586fed42bbSKent Overstreet bch2_btree_iter_set_snapshot(&dst, snapshot); 26596fed42bbSKent Overstreet bch2_btree_iter_set_snapshot(&del, snapshot); 266063095894SKent Overstreet 2661700c25b3SKent Overstreet bch2_trans_begin(&trans); 2662700c25b3SKent Overstreet 26635f786787SKent Overstreet k = insert 266467e0dd8fSKent Overstreet ? bch2_btree_iter_peek_prev(&src) 266567e0dd8fSKent Overstreet : bch2_btree_iter_peek(&src); 266663095894SKent Overstreet if ((ret = bkey_err(k))) 266750dc0f69SKent Overstreet continue; 266863095894SKent Overstreet 266963095894SKent Overstreet if (!k.k || k.k->p.inode != inode->v.i_ino) 267063095894SKent Overstreet break; 267163095894SKent Overstreet 26725f786787SKent Overstreet if (insert && 26735f786787SKent Overstreet bkey_cmp(k.k->p, POS(inode->v.i_ino, offset >> 9)) <= 0) 26745f786787SKent Overstreet break; 26755f786787SKent Overstreet reassemble: 267607a1006aSKent Overstreet bch2_bkey_buf_reassemble(©, c, k); 26775f786787SKent Overstreet 26785f786787SKent Overstreet if (insert && 2679283eda57SKent Overstreet bkey_cmp(bkey_start_pos(k.k), move_pos) < 0) 268035189e09SKent Overstreet bch2_cut_front(move_pos, copy.k); 26815f786787SKent Overstreet 268235189e09SKent Overstreet copy.k->k.p.offset += shift >> 9; 268367e0dd8fSKent Overstreet bch2_btree_iter_set_pos(&dst, bkey_start_pos(©.k->k)); 26841c6fdbd8SKent Overstreet 268567e0dd8fSKent Overstreet ret = bch2_extent_atomic_end(&trans, &dst, copy.k, &atomic_end); 26863c7f3b7aSKent Overstreet if (ret) 268750dc0f69SKent Overstreet continue; 2688e2d9912cSKent Overstreet 268935189e09SKent Overstreet if (bkey_cmp(atomic_end, copy.k->k.p)) { 26905f786787SKent Overstreet if (insert) { 26915f786787SKent Overstreet move_pos = atomic_end; 26925f786787SKent Overstreet move_pos.offset -= shift >> 9; 26935f786787SKent Overstreet goto reassemble; 26945f786787SKent Overstreet } else { 2695085ab693SKent Overstreet bch2_cut_back(atomic_end, copy.k); 26965f786787SKent Overstreet } 26975f786787SKent Overstreet } 26985f786787SKent Overstreet 269963095894SKent Overstreet bkey_init(&delete.k); 2700283eda57SKent Overstreet delete.k.p = copy.k->k.p; 2701283eda57SKent Overstreet delete.k.size = copy.k->k.size; 2702283eda57SKent Overstreet delete.k.p.offset -= shift >> 9; 270367e0dd8fSKent Overstreet bch2_btree_iter_set_pos(&del, bkey_start_pos(&delete.k)); 27041c6fdbd8SKent Overstreet 27055f786787SKent Overstreet next_pos = insert ? bkey_start_pos(&delete.k) : delete.k.p; 270663095894SKent Overstreet 270735189e09SKent Overstreet if (copy.k->k.size == k.k->size) { 270863095894SKent Overstreet /* 270963095894SKent Overstreet * If we're moving the entire extent, we can skip 271063095894SKent Overstreet * running triggers: 271163095894SKent Overstreet */ 27122d594dfbSKent Overstreet trigger_flags |= BTREE_TRIGGER_NORUN; 271363095894SKent Overstreet } else { 271463095894SKent Overstreet /* We might end up splitting compressed extents: */ 271563095894SKent Overstreet unsigned nr_ptrs = 27164de77495SKent Overstreet bch2_bkey_nr_ptrs_allocated(bkey_i_to_s_c(copy.k)); 271763095894SKent Overstreet 271863095894SKent Overstreet ret = bch2_disk_reservation_get(c, &disk_res, 271935189e09SKent Overstreet copy.k->k.size, nr_ptrs, 27201c6fdbd8SKent Overstreet BCH_DISK_RESERVATION_NOFAIL); 27211c6fdbd8SKent Overstreet BUG_ON(ret); 272263095894SKent Overstreet } 27231c6fdbd8SKent Overstreet 272467e0dd8fSKent Overstreet ret = bch2_btree_iter_traverse(&del) ?: 272567e0dd8fSKent Overstreet bch2_trans_update(&trans, &del, &delete, trigger_flags) ?: 272667e0dd8fSKent Overstreet bch2_trans_update(&trans, &dst, copy.k, trigger_flags) ?: 272768a2054dSKent Overstreet bch2_trans_commit(&trans, &disk_res, NULL, 27282d594dfbSKent Overstreet BTREE_INSERT_NOFAIL); 27291c6fdbd8SKent Overstreet bch2_disk_reservation_put(c, &disk_res); 273050dc0f69SKent Overstreet 273163095894SKent Overstreet if (!ret) 273267e0dd8fSKent Overstreet bch2_btree_iter_set_pos(&src, next_pos); 273350dc0f69SKent Overstreet } 273467e0dd8fSKent Overstreet bch2_trans_iter_exit(&trans, &del); 273567e0dd8fSKent Overstreet bch2_trans_iter_exit(&trans, &dst); 273667e0dd8fSKent Overstreet bch2_trans_iter_exit(&trans, &src); 273750dc0f69SKent Overstreet bch2_trans_exit(&trans); 273850dc0f69SKent Overstreet bch2_bkey_buf_exit(©, c); 273963095894SKent Overstreet 27408ef231bdSKent Overstreet if (ret) 274174163da7SKent Overstreet return ret; 27421c6fdbd8SKent Overstreet 274374163da7SKent Overstreet mutex_lock(&inode->ei_update_lock); 27445f786787SKent Overstreet if (!insert) { 27458ef231bdSKent Overstreet i_size_write(&inode->v, new_size); 27468ef231bdSKent Overstreet ret = bch2_write_inode_size(c, inode, new_size, 27478ef231bdSKent Overstreet ATTR_MTIME|ATTR_CTIME); 274874163da7SKent Overstreet } else { 274974163da7SKent Overstreet /* We need an inode update to update bi_journal_seq for fsync: */ 275074163da7SKent Overstreet ret = bch2_write_inode(c, inode, inode_update_times_fn, NULL, 275174163da7SKent Overstreet ATTR_MTIME|ATTR_CTIME); 27525f786787SKent Overstreet } 275374163da7SKent Overstreet mutex_unlock(&inode->ei_update_lock); 27541c6fdbd8SKent Overstreet return ret; 27551c6fdbd8SKent Overstreet } 27561c6fdbd8SKent Overstreet 2757694015c2SKent Overstreet static int __bchfs_fallocate(struct bch_inode_info *inode, int mode, 2758694015c2SKent Overstreet u64 start_sector, u64 end_sector) 27591c6fdbd8SKent Overstreet { 27601c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 2761190fa7afSKent Overstreet struct btree_trans trans; 276267e0dd8fSKent Overstreet struct btree_iter iter; 2763694015c2SKent Overstreet struct bpos end_pos = POS(inode->v.i_ino, end_sector); 27649a3df993SKent Overstreet unsigned replicas = io_opts(c, &inode->ei_inode).data_replicas; 2765694015c2SKent Overstreet int ret = 0; 27661c6fdbd8SKent Overstreet 2767f7beb4caSKent Overstreet bch2_trans_init(&trans, c, BTREE_ITER_MAX, 512); 27681c6fdbd8SKent Overstreet 276967e0dd8fSKent Overstreet bch2_trans_iter_init(&trans, &iter, BTREE_ID_extents, 2770694015c2SKent Overstreet POS(inode->v.i_ino, start_sector), 2771190fa7afSKent Overstreet BTREE_ITER_SLOTS|BTREE_ITER_INTENT); 27721c6fdbd8SKent Overstreet 277367e0dd8fSKent Overstreet while (!ret && bkey_cmp(iter.pos, end_pos) < 0) { 27742e87eae1SKent Overstreet s64 i_sectors_delta = 0; 27751c6fdbd8SKent Overstreet struct disk_reservation disk_res = { 0 }; 2776190fa7afSKent Overstreet struct quota_res quota_res = { 0 }; 27771c6fdbd8SKent Overstreet struct bkey_i_reservation reservation; 27781c6fdbd8SKent Overstreet struct bkey_s_c k; 2779694015c2SKent Overstreet unsigned sectors; 27806fed42bbSKent Overstreet u32 snapshot; 27811c6fdbd8SKent Overstreet 2782163e885aSKent Overstreet bch2_trans_begin(&trans); 2783a8abd3a7SKent Overstreet 27846fed42bbSKent Overstreet ret = bch2_subvolume_get_snapshot(&trans, 27856fed42bbSKent Overstreet inode->ei_subvol, &snapshot); 27866fed42bbSKent Overstreet if (ret) 27876fed42bbSKent Overstreet goto bkey_err; 27886fed42bbSKent Overstreet 27896fed42bbSKent Overstreet bch2_btree_iter_set_snapshot(&iter, snapshot); 27906fed42bbSKent Overstreet 279167e0dd8fSKent Overstreet k = bch2_btree_iter_peek_slot(&iter); 27920f238367SKent Overstreet if ((ret = bkey_err(k))) 27930f238367SKent Overstreet goto bkey_err; 27941c6fdbd8SKent Overstreet 27951c6fdbd8SKent Overstreet /* already reserved */ 279626609b61SKent Overstreet if (k.k->type == KEY_TYPE_reservation && 27971c6fdbd8SKent Overstreet bkey_s_c_to_reservation(k).v->nr_replicas >= replicas) { 279867e0dd8fSKent Overstreet bch2_btree_iter_advance(&iter); 27991c6fdbd8SKent Overstreet continue; 28001c6fdbd8SKent Overstreet } 28011c6fdbd8SKent Overstreet 2802190fa7afSKent Overstreet if (bkey_extent_is_data(k.k) && 2803190fa7afSKent Overstreet !(mode & FALLOC_FL_ZERO_RANGE)) { 280467e0dd8fSKent Overstreet bch2_btree_iter_advance(&iter); 28051c6fdbd8SKent Overstreet continue; 28061c6fdbd8SKent Overstreet } 28071c6fdbd8SKent Overstreet 28081c6fdbd8SKent Overstreet bkey_reservation_init(&reservation.k_i); 280926609b61SKent Overstreet reservation.k.type = KEY_TYPE_reservation; 28101c6fdbd8SKent Overstreet reservation.k.p = k.k->p; 28111c6fdbd8SKent Overstreet reservation.k.size = k.k->size; 28121c6fdbd8SKent Overstreet 281367e0dd8fSKent Overstreet bch2_cut_front(iter.pos, &reservation.k_i); 2814085ab693SKent Overstreet bch2_cut_back(end_pos, &reservation.k_i); 28151c6fdbd8SKent Overstreet 28161c6fdbd8SKent Overstreet sectors = reservation.k.size; 28174de77495SKent Overstreet reservation.v.nr_replicas = bch2_bkey_nr_ptrs_allocated(k); 28181c6fdbd8SKent Overstreet 28191c6fdbd8SKent Overstreet if (!bkey_extent_is_allocation(k.k)) { 28201c6fdbd8SKent Overstreet ret = bch2_quota_reservation_add(c, inode, 2821190fa7afSKent Overstreet "a_res, 28221c6fdbd8SKent Overstreet sectors, true); 28231c6fdbd8SKent Overstreet if (unlikely(ret)) 28240f238367SKent Overstreet goto bkey_err; 28251c6fdbd8SKent Overstreet } 28261c6fdbd8SKent Overstreet 28271c6fdbd8SKent Overstreet if (reservation.v.nr_replicas < replicas || 28284de77495SKent Overstreet bch2_bkey_sectors_compressed(k)) { 28291c6fdbd8SKent Overstreet ret = bch2_disk_reservation_get(c, &disk_res, sectors, 28301c6fdbd8SKent Overstreet replicas, 0); 28311c6fdbd8SKent Overstreet if (unlikely(ret)) 28320f238367SKent Overstreet goto bkey_err; 28331c6fdbd8SKent Overstreet 28341c6fdbd8SKent Overstreet reservation.v.nr_replicas = disk_res.nr_replicas; 28351c6fdbd8SKent Overstreet } 28361c6fdbd8SKent Overstreet 28378c6d298aSKent Overstreet ret = bch2_extent_update(&trans, inode_inum(inode), &iter, 28388c6d298aSKent Overstreet &reservation.k_i, 283968a2054dSKent Overstreet &disk_res, NULL, 2840a6336910SKent Overstreet 0, &i_sectors_delta, true); 28418810386fSKent Overstreet if (ret) 28428810386fSKent Overstreet goto bkey_err; 28432e87eae1SKent Overstreet i_sectors_acct(c, inode, "a_res, i_sectors_delta); 28440f238367SKent Overstreet bkey_err: 2845190fa7afSKent Overstreet bch2_quota_reservation_put(c, inode, "a_res); 28461c6fdbd8SKent Overstreet bch2_disk_reservation_put(c, &disk_res); 28471c6fdbd8SKent Overstreet if (ret == -EINTR) 28481c6fdbd8SKent Overstreet ret = 0; 284950dc0f69SKent Overstreet } 285074163da7SKent Overstreet 285174163da7SKent Overstreet if (ret == -ENOSPC && (mode & FALLOC_FL_ZERO_RANGE)) { 285274163da7SKent Overstreet struct quota_res quota_res = { 0 }; 285374163da7SKent Overstreet s64 i_sectors_delta = 0; 285474163da7SKent Overstreet 285574163da7SKent Overstreet bch2_fpunch_at(&trans, &iter, inode_inum(inode), 285674163da7SKent Overstreet end_sector, &i_sectors_delta); 285774163da7SKent Overstreet i_sectors_acct(c, inode, "a_res, i_sectors_delta); 285874163da7SKent Overstreet bch2_quota_reservation_put(c, inode, "a_res); 285974163da7SKent Overstreet } 286074163da7SKent Overstreet 286167e0dd8fSKent Overstreet bch2_trans_iter_exit(&trans, &iter); 2862694015c2SKent Overstreet bch2_trans_exit(&trans); 2863694015c2SKent Overstreet return ret; 2864694015c2SKent Overstreet } 286550dc0f69SKent Overstreet 2866694015c2SKent Overstreet static long bchfs_fallocate(struct bch_inode_info *inode, int mode, 2867694015c2SKent Overstreet loff_t offset, loff_t len) 2868694015c2SKent Overstreet { 2869694015c2SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 287074163da7SKent Overstreet u64 end = offset + len; 287174163da7SKent Overstreet u64 block_start = round_down(offset, block_bytes(c)); 287274163da7SKent Overstreet u64 block_end = round_up(end, block_bytes(c)); 287374163da7SKent Overstreet bool truncated_last_page = false; 287474163da7SKent Overstreet int ret, ret2 = 0; 2875694015c2SKent Overstreet 2876694015c2SKent Overstreet if (!(mode & FALLOC_FL_KEEP_SIZE) && end > inode->v.i_size) { 2877694015c2SKent Overstreet ret = inode_newsize_ok(&inode->v, end); 2878694015c2SKent Overstreet if (ret) 287974163da7SKent Overstreet return ret; 2880694015c2SKent Overstreet } 2881694015c2SKent Overstreet 2882694015c2SKent Overstreet if (mode & FALLOC_FL_ZERO_RANGE) { 288374163da7SKent Overstreet ret = bch2_truncate_pages(inode, offset, end); 288474163da7SKent Overstreet if (unlikely(ret < 0)) 288574163da7SKent Overstreet return ret; 2886694015c2SKent Overstreet 288774163da7SKent Overstreet truncated_last_page = ret; 2888694015c2SKent Overstreet 2889694015c2SKent Overstreet truncate_pagecache_range(&inode->v, offset, end - 1); 289074163da7SKent Overstreet 289174163da7SKent Overstreet block_start = round_up(offset, block_bytes(c)); 289274163da7SKent Overstreet block_end = round_down(end, block_bytes(c)); 2893694015c2SKent Overstreet } 2894694015c2SKent Overstreet 2895694015c2SKent Overstreet ret = __bchfs_fallocate(inode, mode, block_start >> 9, block_end >> 9); 2896e0541a93SKent Overstreet 2897e0541a93SKent Overstreet /* 289874163da7SKent Overstreet * On -ENOSPC in ZERO_RANGE mode, we still want to do the inode update, 289974163da7SKent Overstreet * so that the VFS cache i_size is consistent with the btree i_size: 2900e0541a93SKent Overstreet */ 290174163da7SKent Overstreet if (ret && 290274163da7SKent Overstreet !(ret == -ENOSPC && (mode & FALLOC_FL_ZERO_RANGE))) 290374163da7SKent Overstreet return ret; 29041c6fdbd8SKent Overstreet 290574163da7SKent Overstreet if (mode & FALLOC_FL_KEEP_SIZE && end > inode->v.i_size) 2906e0541a93SKent Overstreet end = inode->v.i_size; 290774163da7SKent Overstreet 290874163da7SKent Overstreet if (end >= inode->v.i_size && 290974163da7SKent Overstreet (((mode & FALLOC_FL_ZERO_RANGE) && !truncated_last_page) || 291074163da7SKent Overstreet !(mode & FALLOC_FL_KEEP_SIZE))) { 291174163da7SKent Overstreet spin_lock(&inode->v.i_lock); 2912e0541a93SKent Overstreet i_size_write(&inode->v, end); 291374163da7SKent Overstreet spin_unlock(&inode->v.i_lock); 2914e0541a93SKent Overstreet 29151c6fdbd8SKent Overstreet mutex_lock(&inode->ei_update_lock); 291674163da7SKent Overstreet ret2 = bch2_write_inode_size(c, inode, end, 0); 29171c6fdbd8SKent Overstreet mutex_unlock(&inode->ei_update_lock); 29181c6fdbd8SKent Overstreet } 291974163da7SKent Overstreet 292074163da7SKent Overstreet return ret ?: ret2; 29211c6fdbd8SKent Overstreet } 29221c6fdbd8SKent Overstreet 29231c6fdbd8SKent Overstreet long bch2_fallocate_dispatch(struct file *file, int mode, 29241c6fdbd8SKent Overstreet loff_t offset, loff_t len) 29251c6fdbd8SKent Overstreet { 29261c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 29272a9101a9SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 29282a9101a9SKent Overstreet long ret; 29292a9101a9SKent Overstreet 29302a9101a9SKent Overstreet if (!percpu_ref_tryget(&c->writes)) 29312a9101a9SKent Overstreet return -EROFS; 29321c6fdbd8SKent Overstreet 293374163da7SKent Overstreet inode_lock(&inode->v); 293474163da7SKent Overstreet inode_dio_wait(&inode->v); 293574163da7SKent Overstreet bch2_pagecache_block_get(&inode->ei_pagecache_lock); 293674163da7SKent Overstreet 29371c6fdbd8SKent Overstreet if (!(mode & ~(FALLOC_FL_KEEP_SIZE|FALLOC_FL_ZERO_RANGE))) 29382a9101a9SKent Overstreet ret = bchfs_fallocate(inode, mode, offset, len); 29392a9101a9SKent Overstreet else if (mode == (FALLOC_FL_PUNCH_HOLE|FALLOC_FL_KEEP_SIZE)) 29402a9101a9SKent Overstreet ret = bchfs_fpunch(inode, offset, len); 29412a9101a9SKent Overstreet else if (mode == FALLOC_FL_INSERT_RANGE) 29422a9101a9SKent Overstreet ret = bchfs_fcollapse_finsert(inode, offset, len, true); 29432a9101a9SKent Overstreet else if (mode == FALLOC_FL_COLLAPSE_RANGE) 29442a9101a9SKent Overstreet ret = bchfs_fcollapse_finsert(inode, offset, len, false); 29452a9101a9SKent Overstreet else 29462a9101a9SKent Overstreet ret = -EOPNOTSUPP; 29471c6fdbd8SKent Overstreet 294874163da7SKent Overstreet 294974163da7SKent Overstreet bch2_pagecache_block_put(&inode->ei_pagecache_lock); 295074163da7SKent Overstreet inode_unlock(&inode->v); 29512a9101a9SKent Overstreet percpu_ref_put(&c->writes); 29521c6fdbd8SKent Overstreet 29532a9101a9SKent Overstreet return ret; 29541c6fdbd8SKent Overstreet } 29551c6fdbd8SKent Overstreet 295676426098SKent Overstreet static void mark_range_unallocated(struct bch_inode_info *inode, 295776426098SKent Overstreet loff_t start, loff_t end) 295876426098SKent Overstreet { 295976426098SKent Overstreet pgoff_t index = start >> PAGE_SHIFT; 296076426098SKent Overstreet pgoff_t end_index = (end - 1) >> PAGE_SHIFT; 296176426098SKent Overstreet struct folio_batch fbatch; 296276426098SKent Overstreet unsigned i, j; 296376426098SKent Overstreet 296476426098SKent Overstreet folio_batch_init(&fbatch); 296576426098SKent Overstreet 296676426098SKent Overstreet while (filemap_get_folios(inode->v.i_mapping, 296776426098SKent Overstreet &index, end_index, &fbatch)) { 296876426098SKent Overstreet for (i = 0; i < folio_batch_count(&fbatch); i++) { 296976426098SKent Overstreet struct folio *folio = fbatch.folios[i]; 297076426098SKent Overstreet struct bch_page_state *s; 297176426098SKent Overstreet 297276426098SKent Overstreet folio_lock(folio); 297376426098SKent Overstreet s = bch2_page_state(&folio->page); 297476426098SKent Overstreet 29753826ee0bSKent Overstreet if (s) { 29763826ee0bSKent Overstreet spin_lock(&s->lock); 297776426098SKent Overstreet for (j = 0; j < PAGE_SECTORS; j++) 297876426098SKent Overstreet s->s[j].nr_replicas = 0; 29793826ee0bSKent Overstreet spin_unlock(&s->lock); 29803826ee0bSKent Overstreet } 298176426098SKent Overstreet 298276426098SKent Overstreet folio_unlock(folio); 298376426098SKent Overstreet } 298476426098SKent Overstreet folio_batch_release(&fbatch); 298576426098SKent Overstreet cond_resched(); 298676426098SKent Overstreet } 298776426098SKent Overstreet } 298876426098SKent Overstreet 298976426098SKent Overstreet loff_t bch2_remap_file_range(struct file *file_src, loff_t pos_src, 299076426098SKent Overstreet struct file *file_dst, loff_t pos_dst, 299176426098SKent Overstreet loff_t len, unsigned remap_flags) 299276426098SKent Overstreet { 299376426098SKent Overstreet struct bch_inode_info *src = file_bch_inode(file_src); 299476426098SKent Overstreet struct bch_inode_info *dst = file_bch_inode(file_dst); 299576426098SKent Overstreet struct bch_fs *c = src->v.i_sb->s_fs_info; 29962e87eae1SKent Overstreet s64 i_sectors_delta = 0; 2997677fc056SKent Overstreet u64 aligned_len; 299876426098SKent Overstreet loff_t ret = 0; 299976426098SKent Overstreet 300076426098SKent Overstreet if (remap_flags & ~(REMAP_FILE_DEDUP|REMAP_FILE_ADVISORY)) 300176426098SKent Overstreet return -EINVAL; 300276426098SKent Overstreet 300376426098SKent Overstreet if (remap_flags & REMAP_FILE_DEDUP) 300476426098SKent Overstreet return -EOPNOTSUPP; 300576426098SKent Overstreet 300676426098SKent Overstreet if ((pos_src & (block_bytes(c) - 1)) || 300776426098SKent Overstreet (pos_dst & (block_bytes(c) - 1))) 300876426098SKent Overstreet return -EINVAL; 300976426098SKent Overstreet 301076426098SKent Overstreet if (src == dst && 301176426098SKent Overstreet abs(pos_src - pos_dst) < len) 301276426098SKent Overstreet return -EINVAL; 301376426098SKent Overstreet 301476426098SKent Overstreet bch2_lock_inodes(INODE_LOCK|INODE_PAGECACHE_BLOCK, src, dst); 301576426098SKent Overstreet 30162e87eae1SKent Overstreet file_update_time(file_dst); 30172e87eae1SKent Overstreet 301876426098SKent Overstreet inode_dio_wait(&src->v); 301976426098SKent Overstreet inode_dio_wait(&dst->v); 302076426098SKent Overstreet 302176426098SKent Overstreet ret = generic_remap_file_range_prep(file_src, pos_src, 302276426098SKent Overstreet file_dst, pos_dst, 302376426098SKent Overstreet &len, remap_flags); 302476426098SKent Overstreet if (ret < 0 || len == 0) 30252e87eae1SKent Overstreet goto err; 302676426098SKent Overstreet 3027677fc056SKent Overstreet aligned_len = round_up((u64) len, block_bytes(c)); 302876426098SKent Overstreet 302976426098SKent Overstreet ret = write_invalidate_inode_pages_range(dst->v.i_mapping, 3030677fc056SKent Overstreet pos_dst, pos_dst + len - 1); 303176426098SKent Overstreet if (ret) 30322e87eae1SKent Overstreet goto err; 303376426098SKent Overstreet 303476426098SKent Overstreet mark_range_unallocated(src, pos_src, pos_src + aligned_len); 303576426098SKent Overstreet 30362e87eae1SKent Overstreet ret = bch2_remap_range(c, 30376fed42bbSKent Overstreet inode_inum(dst), pos_dst >> 9, 30386fed42bbSKent Overstreet inode_inum(src), pos_src >> 9, 303976426098SKent Overstreet aligned_len >> 9, 30402e87eae1SKent Overstreet pos_dst + len, &i_sectors_delta); 30412e87eae1SKent Overstreet if (ret < 0) 30422e87eae1SKent Overstreet goto err; 304376426098SKent Overstreet 30442e87eae1SKent Overstreet /* 30452e87eae1SKent Overstreet * due to alignment, we might have remapped slightly more than requsted 30462e87eae1SKent Overstreet */ 3047677fc056SKent Overstreet ret = min((u64) ret << 9, (u64) len); 30482e87eae1SKent Overstreet 30492e87eae1SKent Overstreet /* XXX get a quota reservation */ 30502e87eae1SKent Overstreet i_sectors_acct(c, dst, NULL, i_sectors_delta); 30512e87eae1SKent Overstreet 30522e87eae1SKent Overstreet spin_lock(&dst->v.i_lock); 3053677fc056SKent Overstreet if (pos_dst + ret > dst->v.i_size) 3054677fc056SKent Overstreet i_size_write(&dst->v, pos_dst + ret); 30552e87eae1SKent Overstreet spin_unlock(&dst->v.i_lock); 3056e7084c9cSKent Overstreet 305768a2054dSKent Overstreet if ((file_dst->f_flags & (__O_SYNC | O_DSYNC)) || 305868a2054dSKent Overstreet IS_SYNC(file_inode(file_dst))) 305968a2054dSKent Overstreet ret = bch2_flush_inode(c, inode_inum(dst)); 30602e87eae1SKent Overstreet err: 306176426098SKent Overstreet bch2_unlock_inodes(INODE_LOCK|INODE_PAGECACHE_BLOCK, src, dst); 306276426098SKent Overstreet 306376426098SKent Overstreet return ret; 306476426098SKent Overstreet } 306576426098SKent Overstreet 30661c6fdbd8SKent Overstreet /* fseek: */ 30671c6fdbd8SKent Overstreet 3068543ef2ebSKent Overstreet static int folio_data_offset(struct folio *folio, unsigned offset) 30691c6fdbd8SKent Overstreet { 3070f57a6a5dSKent Overstreet struct bch_page_state *s = bch2_page_state(&folio->page); 3071f57a6a5dSKent Overstreet unsigned i; 3072f81b648dSKent Overstreet 3073543ef2ebSKent Overstreet if (s) 3074543ef2ebSKent Overstreet for (i = offset >> 9; i < PAGE_SECTORS; i++) 3075f57a6a5dSKent Overstreet if (s->s[i].state >= SECTOR_DIRTY) 3076543ef2ebSKent Overstreet return i << 9; 3077f57a6a5dSKent Overstreet 3078543ef2ebSKent Overstreet return -1; 30791c6fdbd8SKent Overstreet } 30801c6fdbd8SKent Overstreet 3081543ef2ebSKent Overstreet static loff_t bch2_seek_pagecache_data(struct inode *vinode, 30821c6fdbd8SKent Overstreet loff_t start_offset, 30831c6fdbd8SKent Overstreet loff_t end_offset) 30841c6fdbd8SKent Overstreet { 30851c6fdbd8SKent Overstreet struct folio_batch fbatch; 30861c6fdbd8SKent Overstreet pgoff_t start_index = start_offset >> PAGE_SHIFT; 30871c6fdbd8SKent Overstreet pgoff_t end_index = end_offset >> PAGE_SHIFT; 30881c6fdbd8SKent Overstreet pgoff_t index = start_index; 30891c6fdbd8SKent Overstreet unsigned i; 3090543ef2ebSKent Overstreet loff_t ret; 3091543ef2ebSKent Overstreet int offset; 30921c6fdbd8SKent Overstreet 30931c6fdbd8SKent Overstreet folio_batch_init(&fbatch); 30941c6fdbd8SKent Overstreet 30951c6fdbd8SKent Overstreet while (filemap_get_folios(vinode->i_mapping, 30961c6fdbd8SKent Overstreet &index, end_index, &fbatch)) { 30971c6fdbd8SKent Overstreet for (i = 0; i < folio_batch_count(&fbatch); i++) { 30981c6fdbd8SKent Overstreet struct folio *folio = fbatch.folios[i]; 30991c6fdbd8SKent Overstreet 31001c6fdbd8SKent Overstreet folio_lock(folio); 3101543ef2ebSKent Overstreet offset = folio_data_offset(folio, 3102543ef2ebSKent Overstreet folio->index == start_index 3103543ef2ebSKent Overstreet ? start_offset & (PAGE_SIZE - 1) 3104543ef2ebSKent Overstreet : 0); 3105543ef2ebSKent Overstreet if (offset >= 0) { 3106543ef2ebSKent Overstreet ret = clamp(((loff_t) folio->index << PAGE_SHIFT) + 3107543ef2ebSKent Overstreet offset, 3108543ef2ebSKent Overstreet start_offset, end_offset); 31091c6fdbd8SKent Overstreet folio_unlock(folio); 31101c6fdbd8SKent Overstreet folio_batch_release(&fbatch); 3111543ef2ebSKent Overstreet return ret; 31121c6fdbd8SKent Overstreet } 31131c6fdbd8SKent Overstreet folio_unlock(folio); 31141c6fdbd8SKent Overstreet } 31151c6fdbd8SKent Overstreet folio_batch_release(&fbatch); 31161c6fdbd8SKent Overstreet cond_resched(); 31171c6fdbd8SKent Overstreet } 31181c6fdbd8SKent Overstreet 31191c6fdbd8SKent Overstreet return end_offset; 31201c6fdbd8SKent Overstreet } 31211c6fdbd8SKent Overstreet 31221c6fdbd8SKent Overstreet static loff_t bch2_seek_data(struct file *file, u64 offset) 31231c6fdbd8SKent Overstreet { 31241c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 31251c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 3126424eb881SKent Overstreet struct btree_trans trans; 312767e0dd8fSKent Overstreet struct btree_iter iter; 31281c6fdbd8SKent Overstreet struct bkey_s_c k; 31296fed42bbSKent Overstreet subvol_inum inum = inode_inum(inode); 31301c6fdbd8SKent Overstreet u64 isize, next_data = MAX_LFS_FILESIZE; 31316fed42bbSKent Overstreet u32 snapshot; 31321c6fdbd8SKent Overstreet int ret; 31331c6fdbd8SKent Overstreet 31341c6fdbd8SKent Overstreet isize = i_size_read(&inode->v); 31351c6fdbd8SKent Overstreet if (offset >= isize) 31361c6fdbd8SKent Overstreet return -ENXIO; 31371c6fdbd8SKent Overstreet 313820bceecbSKent Overstreet bch2_trans_init(&trans, c, 0, 0); 31396fed42bbSKent Overstreet retry: 31406fed42bbSKent Overstreet bch2_trans_begin(&trans); 31416fed42bbSKent Overstreet 31426fed42bbSKent Overstreet ret = bch2_subvolume_get_snapshot(&trans, inum.subvol, &snapshot); 31436fed42bbSKent Overstreet if (ret) 31446fed42bbSKent Overstreet goto err; 3145424eb881SKent Overstreet 3146e5fa91d7SKent Overstreet for_each_btree_key_norestart(&trans, iter, BTREE_ID_extents, 31476fed42bbSKent Overstreet SPOS(inode->v.i_ino, offset >> 9, snapshot), 0, k, ret) { 31481c6fdbd8SKent Overstreet if (k.k->p.inode != inode->v.i_ino) { 31491c6fdbd8SKent Overstreet break; 31501c6fdbd8SKent Overstreet } else if (bkey_extent_is_data(k.k)) { 31511c6fdbd8SKent Overstreet next_data = max(offset, bkey_start_offset(k.k) << 9); 31521c6fdbd8SKent Overstreet break; 31531c6fdbd8SKent Overstreet } else if (k.k->p.offset >> 9 > isize) 31541c6fdbd8SKent Overstreet break; 31551c6fdbd8SKent Overstreet } 315667e0dd8fSKent Overstreet bch2_trans_iter_exit(&trans, &iter); 31576fed42bbSKent Overstreet err: 31586fed42bbSKent Overstreet if (ret == -EINTR) 31596fed42bbSKent Overstreet goto retry; 31601c6fdbd8SKent Overstreet 31619a796fdbSKent Overstreet bch2_trans_exit(&trans); 31621c6fdbd8SKent Overstreet if (ret) 31631c6fdbd8SKent Overstreet return ret; 31641c6fdbd8SKent Overstreet 31651c6fdbd8SKent Overstreet if (next_data > offset) 3166543ef2ebSKent Overstreet next_data = bch2_seek_pagecache_data(&inode->v, 31671c6fdbd8SKent Overstreet offset, next_data); 31681c6fdbd8SKent Overstreet 3169e10d3094SKent Overstreet if (next_data >= isize) 31701c6fdbd8SKent Overstreet return -ENXIO; 31711c6fdbd8SKent Overstreet 31721c6fdbd8SKent Overstreet return vfs_setpos(file, next_data, MAX_LFS_FILESIZE); 31731c6fdbd8SKent Overstreet } 31741c6fdbd8SKent Overstreet 3175543ef2ebSKent Overstreet static int __page_hole_offset(struct page *page, unsigned offset) 31761c6fdbd8SKent Overstreet { 3177543ef2ebSKent Overstreet struct bch_page_state *s = bch2_page_state(page); 3178543ef2ebSKent Overstreet unsigned i; 3179543ef2ebSKent Overstreet 3180543ef2ebSKent Overstreet if (!s) 3181543ef2ebSKent Overstreet return 0; 3182543ef2ebSKent Overstreet 3183543ef2ebSKent Overstreet for (i = offset >> 9; i < PAGE_SECTORS; i++) 3184543ef2ebSKent Overstreet if (s->s[i].state < SECTOR_DIRTY) 3185543ef2ebSKent Overstreet return i << 9; 3186543ef2ebSKent Overstreet 3187543ef2ebSKent Overstreet return -1; 3188543ef2ebSKent Overstreet } 3189543ef2ebSKent Overstreet 3190543ef2ebSKent Overstreet static loff_t page_hole_offset(struct address_space *mapping, loff_t offset) 3191543ef2ebSKent Overstreet { 3192543ef2ebSKent Overstreet pgoff_t index = offset >> PAGE_SHIFT; 31931c6fdbd8SKent Overstreet struct page *page; 3194543ef2ebSKent Overstreet int pg_offset; 3195543ef2ebSKent Overstreet loff_t ret = -1; 31961c6fdbd8SKent Overstreet 31971c6fdbd8SKent Overstreet page = find_lock_page(mapping, index); 31981c6fdbd8SKent Overstreet if (!page) 3199543ef2ebSKent Overstreet return offset; 32001c6fdbd8SKent Overstreet 3201543ef2ebSKent Overstreet pg_offset = __page_hole_offset(page, offset & (PAGE_SIZE - 1)); 3202543ef2ebSKent Overstreet if (pg_offset >= 0) 3203543ef2ebSKent Overstreet ret = ((loff_t) index << PAGE_SHIFT) + pg_offset; 3204543ef2ebSKent Overstreet 32051c6fdbd8SKent Overstreet unlock_page(page); 32061c6fdbd8SKent Overstreet 32071c6fdbd8SKent Overstreet return ret; 32081c6fdbd8SKent Overstreet } 32091c6fdbd8SKent Overstreet 3210543ef2ebSKent Overstreet static loff_t bch2_seek_pagecache_hole(struct inode *vinode, 32111c6fdbd8SKent Overstreet loff_t start_offset, 32121c6fdbd8SKent Overstreet loff_t end_offset) 32131c6fdbd8SKent Overstreet { 32141c6fdbd8SKent Overstreet struct address_space *mapping = vinode->i_mapping; 3215543ef2ebSKent Overstreet loff_t offset = start_offset, hole; 32161c6fdbd8SKent Overstreet 3217543ef2ebSKent Overstreet while (offset < end_offset) { 3218543ef2ebSKent Overstreet hole = page_hole_offset(mapping, offset); 3219543ef2ebSKent Overstreet if (hole >= 0 && hole <= end_offset) 3220543ef2ebSKent Overstreet return max(start_offset, hole); 3221543ef2ebSKent Overstreet 3222543ef2ebSKent Overstreet offset += PAGE_SIZE; 3223543ef2ebSKent Overstreet offset &= PAGE_MASK; 3224543ef2ebSKent Overstreet } 32251c6fdbd8SKent Overstreet 32261c6fdbd8SKent Overstreet return end_offset; 32271c6fdbd8SKent Overstreet } 32281c6fdbd8SKent Overstreet 32291c6fdbd8SKent Overstreet static loff_t bch2_seek_hole(struct file *file, u64 offset) 32301c6fdbd8SKent Overstreet { 32311c6fdbd8SKent Overstreet struct bch_inode_info *inode = file_bch_inode(file); 32321c6fdbd8SKent Overstreet struct bch_fs *c = inode->v.i_sb->s_fs_info; 3233424eb881SKent Overstreet struct btree_trans trans; 323467e0dd8fSKent Overstreet struct btree_iter iter; 32351c6fdbd8SKent Overstreet struct bkey_s_c k; 32366fed42bbSKent Overstreet subvol_inum inum = inode_inum(inode); 32371c6fdbd8SKent Overstreet u64 isize, next_hole = MAX_LFS_FILESIZE; 32386fed42bbSKent Overstreet u32 snapshot; 32391c6fdbd8SKent Overstreet int ret; 32401c6fdbd8SKent Overstreet 32411c6fdbd8SKent Overstreet isize = i_size_read(&inode->v); 32421c6fdbd8SKent Overstreet if (offset >= isize) 32431c6fdbd8SKent Overstreet return -ENXIO; 32441c6fdbd8SKent Overstreet 324520bceecbSKent Overstreet bch2_trans_init(&trans, c, 0, 0); 32466fed42bbSKent Overstreet retry: 32476fed42bbSKent Overstreet bch2_trans_begin(&trans); 32486fed42bbSKent Overstreet 32496fed42bbSKent Overstreet ret = bch2_subvolume_get_snapshot(&trans, inum.subvol, &snapshot); 32506fed42bbSKent Overstreet if (ret) 32516fed42bbSKent Overstreet goto err; 3252424eb881SKent Overstreet 3253e5fa91d7SKent Overstreet for_each_btree_key_norestart(&trans, iter, BTREE_ID_extents, 32546fed42bbSKent Overstreet SPOS(inode->v.i_ino, offset >> 9, snapshot), 325594f651e2SKent Overstreet BTREE_ITER_SLOTS, k, ret) { 32561c6fdbd8SKent Overstreet if (k.k->p.inode != inode->v.i_ino) { 3257543ef2ebSKent Overstreet next_hole = bch2_seek_pagecache_hole(&inode->v, 32581c6fdbd8SKent Overstreet offset, MAX_LFS_FILESIZE); 32591c6fdbd8SKent Overstreet break; 32601c6fdbd8SKent Overstreet } else if (!bkey_extent_is_data(k.k)) { 3261543ef2ebSKent Overstreet next_hole = bch2_seek_pagecache_hole(&inode->v, 32621c6fdbd8SKent Overstreet max(offset, bkey_start_offset(k.k) << 9), 32631c6fdbd8SKent Overstreet k.k->p.offset << 9); 32641c6fdbd8SKent Overstreet 32651c6fdbd8SKent Overstreet if (next_hole < k.k->p.offset << 9) 32661c6fdbd8SKent Overstreet break; 32671c6fdbd8SKent Overstreet } else { 32681c6fdbd8SKent Overstreet offset = max(offset, bkey_start_offset(k.k) << 9); 32691c6fdbd8SKent Overstreet } 32701c6fdbd8SKent Overstreet } 327167e0dd8fSKent Overstreet bch2_trans_iter_exit(&trans, &iter); 32726fed42bbSKent Overstreet err: 32736fed42bbSKent Overstreet if (ret == -EINTR) 32746fed42bbSKent Overstreet goto retry; 32751c6fdbd8SKent Overstreet 32769a796fdbSKent Overstreet bch2_trans_exit(&trans); 32771c6fdbd8SKent Overstreet if (ret) 32781c6fdbd8SKent Overstreet return ret; 32791c6fdbd8SKent Overstreet 32801c6fdbd8SKent Overstreet if (next_hole > isize) 32811c6fdbd8SKent Overstreet next_hole = isize; 32821c6fdbd8SKent Overstreet 32831c6fdbd8SKent Overstreet return vfs_setpos(file, next_hole, MAX_LFS_FILESIZE); 32841c6fdbd8SKent Overstreet } 32851c6fdbd8SKent Overstreet 32861c6fdbd8SKent Overstreet loff_t bch2_llseek(struct file *file, loff_t offset, int whence) 32871c6fdbd8SKent Overstreet { 32881c6fdbd8SKent Overstreet switch (whence) { 32891c6fdbd8SKent Overstreet case SEEK_SET: 32901c6fdbd8SKent Overstreet case SEEK_CUR: 32911c6fdbd8SKent Overstreet case SEEK_END: 32921c6fdbd8SKent Overstreet return generic_file_llseek(file, offset, whence); 32931c6fdbd8SKent Overstreet case SEEK_DATA: 32941c6fdbd8SKent Overstreet return bch2_seek_data(file, offset); 32951c6fdbd8SKent Overstreet case SEEK_HOLE: 32961c6fdbd8SKent Overstreet return bch2_seek_hole(file, offset); 32971c6fdbd8SKent Overstreet } 32981c6fdbd8SKent Overstreet 32991c6fdbd8SKent Overstreet return -EINVAL; 33001c6fdbd8SKent Overstreet } 33011c6fdbd8SKent Overstreet 33021c6fdbd8SKent Overstreet void bch2_fs_fsio_exit(struct bch_fs *c) 33031c6fdbd8SKent Overstreet { 33041c6fdbd8SKent Overstreet bioset_exit(&c->dio_write_bioset); 33051c6fdbd8SKent Overstreet bioset_exit(&c->dio_read_bioset); 33061c6fdbd8SKent Overstreet bioset_exit(&c->writepage_bioset); 33071c6fdbd8SKent Overstreet } 33081c6fdbd8SKent Overstreet 33091c6fdbd8SKent Overstreet int bch2_fs_fsio_init(struct bch_fs *c) 33101c6fdbd8SKent Overstreet { 33111c6fdbd8SKent Overstreet int ret = 0; 33121c6fdbd8SKent Overstreet 33131c6fdbd8SKent Overstreet pr_verbose_init(c->opts, ""); 33141c6fdbd8SKent Overstreet 33151c6fdbd8SKent Overstreet if (bioset_init(&c->writepage_bioset, 33169a3df993SKent Overstreet 4, offsetof(struct bch_writepage_io, op.wbio.bio), 33171c6fdbd8SKent Overstreet BIOSET_NEED_BVECS) || 33181c6fdbd8SKent Overstreet bioset_init(&c->dio_read_bioset, 33191c6fdbd8SKent Overstreet 4, offsetof(struct dio_read, rbio.bio), 33201c6fdbd8SKent Overstreet BIOSET_NEED_BVECS) || 33211c6fdbd8SKent Overstreet bioset_init(&c->dio_write_bioset, 33229a3df993SKent Overstreet 4, offsetof(struct dio_write, op.wbio.bio), 33231c6fdbd8SKent Overstreet BIOSET_NEED_BVECS)) 33241c6fdbd8SKent Overstreet ret = -ENOMEM; 33251c6fdbd8SKent Overstreet 33261c6fdbd8SKent Overstreet pr_verbose_init(c->opts, "ret %i", ret); 33271c6fdbd8SKent Overstreet return ret; 33281c6fdbd8SKent Overstreet } 33291c6fdbd8SKent Overstreet 33301c6fdbd8SKent Overstreet #endif /* NO_BCACHEFS_FS */ 3331