diff options
Diffstat (limited to 'fs/btrfs/btrfs_inode.h')
| -rw-r--r-- | fs/btrfs/btrfs_inode.h | 696 |
1 files changed, 567 insertions, 129 deletions
diff --git a/fs/btrfs/btrfs_inode.h b/fs/btrfs/btrfs_inode.h index 08b286b2a2c5..73602ee8de3f 100644 --- a/fs/btrfs/btrfs_inode.h +++ b/fs/btrfs/btrfs_inode.h @@ -1,28 +1,44 @@ +/* SPDX-License-Identifier: GPL-2.0 */ /* * Copyright (C) 2007 Oracle. All rights reserved. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public - * License v2 as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public - * License along with this program; if not, write to the - * Free Software Foundation, Inc., 59 Temple Place - Suite 330, - * Boston, MA 021110-1307, USA. */ -#ifndef __BTRFS_I__ -#define __BTRFS_I__ - +#ifndef BTRFS_INODE_H +#define BTRFS_INODE_H + +#include <linux/hash.h> +#include <linux/refcount.h> +#include <linux/spinlock.h> +#include <linux/mutex.h> +#include <linux/rwsem.h> +#include <linux/fs.h> +#include <linux/mm.h> +#include <linux/compiler.h> +#include <linux/fscrypt.h> +#include <linux/lockdep.h> +#include <uapi/linux/btrfs_tree.h> +#include <trace/events/btrfs.h> +#include "ctree.h" +#include "block-rsv.h" #include "extent_map.h" -#include "extent_io.h" -#include "ordered-data.h" -#include "delayed-inode.h" +#include "extent-io-tree.h" + +struct posix_acl; +struct iov_iter; +struct writeback_control; +struct btrfs_root; +struct btrfs_fs_info; +struct btrfs_trans_handle; +struct btrfs_bio; +struct btrfs_file_extent; +struct btrfs_delayed_node; + +/* + * Since we search a directory based on f_pos (struct dir_context::pos) we have + * to start at 2 since '.' and '..' have f_pos of 0 and 1 respectively, so + * everybody else has to start at 2 (see btrfs_real_readdir() and dir_emit_dots()). + */ +#define BTRFS_DIR_START_INDEX 2 /* * ordered_data_close is set by truncate when a file that used @@ -31,29 +47,114 @@ * ordered operations list so that we make sure to flush out any * new data the application may have written before commit. */ -#define BTRFS_INODE_ORDERED_DATA_CLOSE 0 -#define BTRFS_INODE_ORPHAN_META_RESERVED 1 -#define BTRFS_INODE_DUMMY 2 -#define BTRFS_INODE_IN_DEFRAG 3 -#define BTRFS_INODE_DELALLOC_META_RESERVED 4 -#define BTRFS_INODE_HAS_ORPHAN_ITEM 5 -#define BTRFS_INODE_HAS_ASYNC_EXTENT 6 -#define BTRFS_INODE_NEEDS_FULL_SYNC 7 -#define BTRFS_INODE_COPY_EVERYTHING 8 -#define BTRFS_INODE_IN_DELALLOC_LIST 9 -#define BTRFS_INODE_READDIO_NEED_LOCK 10 +enum { + BTRFS_INODE_FLUSH_ON_CLOSE, + BTRFS_INODE_DUMMY, + BTRFS_INODE_IN_DEFRAG, + BTRFS_INODE_HAS_ASYNC_EXTENT, + /* + * Always set under the VFS' inode lock, otherwise it can cause races + * during fsync (we start as a fast fsync and then end up in a full + * fsync racing with ordered extent completion). + */ + BTRFS_INODE_NEEDS_FULL_SYNC, + BTRFS_INODE_COPY_EVERYTHING, + BTRFS_INODE_HAS_PROPS, + BTRFS_INODE_SNAPSHOT_FLUSH, + /* + * Set and used when logging an inode and it serves to signal that an + * inode does not have xattrs, so subsequent fsyncs can avoid searching + * for xattrs to log. This bit must be cleared whenever a xattr is added + * to an inode. + */ + BTRFS_INODE_NO_XATTRS, + /* + * Set when we are in a context where we need to start a transaction and + * have dirty pages with the respective file range locked. This is to + * ensure that when reserving space for the transaction, if we are low + * on available space and need to flush delalloc, we will not flush + * delalloc for this inode, because that could result in a deadlock (on + * the file range, inode's io_tree). + */ + BTRFS_INODE_NO_DELALLOC_FLUSH, + /* + * Set when we are working on enabling verity for a file. Computing and + * writing the whole Merkle tree can take a while so we want to prevent + * races where two separate tasks attempt to simultaneously start verity + * on the same file. + */ + BTRFS_INODE_VERITY_IN_PROGRESS, + /* Set when this inode is a free space inode. */ + BTRFS_INODE_FREE_SPACE_INODE, + /* Set when there are no capabilities in XATTs for the inode. */ + BTRFS_INODE_NO_CAP_XATTR, + /* + * Set if an error happened when doing a COW write before submitting a + * bio or during writeback. Used for both buffered writes and direct IO + * writes. This is to signal a fast fsync that it has to wait for + * ordered extents to complete and therefore not log extent maps that + * point to unwritten extents (when an ordered extent completes and it + * has the BTRFS_ORDERED_IOERR flag set, it drops extent maps in its + * range). + */ + BTRFS_INODE_COW_WRITE_ERROR, + /* + * Indicate this is a directory that points to a subvolume for which + * there is no root reference item. That's a case like the following: + * + * $ btrfs subvolume create /mnt/parent + * $ btrfs subvolume create /mnt/parent/child + * $ btrfs subvolume snapshot /mnt/parent /mnt/snap + * + * If subvolume "parent" is root 256, subvolume "child" is root 257 and + * snapshot "snap" is root 258, then there's no root reference item (key + * BTRFS_ROOT_REF_KEY in the root tree) for the subvolume "child" + * associated to root 258 (the snapshot) - there's only for the root + * of the "parent" subvolume (root 256). In the chunk root we have a + * (256 BTRFS_ROOT_REF_KEY 257) key but we don't have a + * (258 BTRFS_ROOT_REF_KEY 257) key - the sames goes for backrefs, we + * have a (257 BTRFS_ROOT_BACKREF_KEY 256) but we don't have a + * (257 BTRFS_ROOT_BACKREF_KEY 258) key. + * + * So when opening the "child" dentry from the snapshot's directory, + * we don't find a root ref item and we create a stub inode. This is + * done at new_simple_dir(), called from btrfs_lookup_dentry(). + */ + BTRFS_INODE_ROOT_STUB, +}; /* in memory btrfs inode */ struct btrfs_inode { /* which subvolume this inode belongs to */ struct btrfs_root *root; - /* key used to find this inode on disk. This is used by the code - * to read in roots of subvolumes +#if BITS_PER_LONG == 32 + /* + * The objectid of the corresponding BTRFS_INODE_ITEM_KEY. + * On 64 bits platforms we can get it from vfs_inode.i_ino, which is an + * unsigned long and therefore 64 bits on such platforms. */ - struct btrfs_key location; + u64 objectid; +#endif + + /* Cached value of inode property 'compression'. */ + u8 prop_compress; - /* Lock for counters */ + /* + * Force compression on the file using the defrag ioctl, could be + * different from prop_compress and takes precedence if set. + */ + u8 defrag_compress; + s8 defrag_compress_level; + + /* + * Lock for counters and all fields used to determine if the inode is in + * the log or not (last_trans, last_sub_trans, last_log_commit, + * logged_trans), to access/update delalloc_bytes, new_delalloc_bytes, + * defrag_bytes, disk_i_size, outstanding_extents, csum_bytes and to + * update the VFS' inode number of bytes used. + * Also protects setting struct file::private_data. + */ spinlock_t lock; /* the extent_tree has caches of all the extent mappings to disk */ @@ -62,19 +163,29 @@ struct btrfs_inode { /* the io_tree does range state (DIRTY, LOCKED etc) */ struct extent_io_tree io_tree; - /* special utility tree used to record which mirrors have already been - * tried when checksums fail for a given block + /* + * Keep track of where the inode has extent items mapped in order to + * make sure the i_size adjustments are accurate. Not required when the + * filesystem is NO_HOLES, the status can't be set while mounted as + * it's a mkfs-time feature. */ - struct extent_io_tree io_failure_tree; + struct extent_io_tree *file_extent_tree; /* held while logging the inode in tree-log.c */ struct mutex log_mutex; - /* held while doing delalloc reservations */ - struct mutex delalloc_mutex; + /* + * Counters to keep track of the number of extent item's we may use due + * to delalloc and such. outstanding_extents is the number of extent + * items we think we'll end up using, and reserved_extents is the number + * of extent items we've reserved metadata for. Protected by 'lock'. + */ + unsigned outstanding_extents; /* used to order data wrt metadata */ - struct btrfs_ordered_inode_tree ordered_tree; + spinlock_t ordered_tree_lock; + struct rb_root ordered_tree; + struct rb_node *ordered_tree_last; /* list of all the delalloc inodes in the FS. There are times we need * to write all the delalloc pages to disk, and this list is used @@ -82,57 +193,106 @@ struct btrfs_inode { */ struct list_head delalloc_inodes; - /* - * list for tracking inodes that must be sent to disk before a - * rename or truncate commit - */ - struct list_head ordered_operations; - - /* node for the red-black tree that links inodes in subvolume root */ - struct rb_node rb_node; - unsigned long runtime_flags; - /* Keep track of who's O_SYNC/fsyncing currently */ - atomic_t sync_writers; - /* full 64 bit generation number, struct vfs_inode doesn't have a big * enough field for this. */ u64 generation; /* - * transid of the trans_handle that last modified this inode + * ID of the transaction handle that last modified this inode. + * Protected by 'lock'. */ u64 last_trans; /* - * log transid when this inode was last modified - */ - u64 last_sub_trans; - - /* - * transid that last logged this inode + * ID of the transaction that last logged this inode. + * Protected by 'lock'. */ u64 logged_trans; - /* total number of bytes pending delalloc, used by stat to calc the - * real block usage of the file + /* + * Log transaction ID when this inode was last modified. + * Protected by 'lock'. */ - u64 delalloc_bytes; + int last_sub_trans; + + /* A local copy of root's last_log_commit. Protected by 'lock'. */ + int last_log_commit; + + union { + /* + * Total number of bytes pending delalloc, used by stat to + * calculate the real block usage of the file. This is used + * only for files. Protected by 'lock'. + */ + u64 delalloc_bytes; + /* + * The lowest possible index of the next dir index key which + * points to an inode that needs to be logged. + * This is used only for directories. + * Use the helpers btrfs_get_first_dir_index_to_log() and + * btrfs_set_first_dir_index_to_log() to access this field. + */ + u64 first_dir_index_to_log; + }; + + union { + /* + * Total number of bytes pending delalloc that fall within a file + * range that is either a hole or beyond EOF (and no prealloc extent + * exists in the range). This is always <= delalloc_bytes and this + * is used only for files. Protected by 'lock'. + */ + u64 new_delalloc_bytes; + /* + * The offset of the last dir index key that was logged. + * This is used only for directories. Protected by 'log_mutex'. + */ + u64 last_dir_index_offset; + }; + + union { + /* + * Total number of bytes pending defrag, used by stat to check whether + * it needs COW. Protected by 'lock'. + * Used by inodes other than the data relocation inode. + */ + u64 defrag_bytes; + + /* + * Logical address of the block group being relocated. + * Used only by the data relocation inode. + */ + u64 reloc_block_group_start; + }; /* - * the size of the file stored in the metadata on disk. data=ordered + * The size of the file stored in the metadata on disk. data=ordered * means the in-memory i_size might be larger than the size on disk - * because not all the blocks are written yet. + * because not all the blocks are written yet. Protected by 'lock'. */ u64 disk_i_size; - /* - * if this is a directory then index_cnt is the counter for the index - * number for new files that are created - */ - u64 index_cnt; + union { + /* + * If this is a directory then index_cnt is the counter for the + * index number for new files that are created. For an empty + * directory, this must be initialized to BTRFS_DIR_START_INDEX. + */ + u64 index_cnt; + + /* + * If this is not a directory, this is the number of bytes + * outstanding that are going to need csums. This is used in + * ENOSPC accounting. Protected by 'lock'. + */ + u64 csum_bytes; + }; + + /* Cache the directory index number to speed the dir/file remove */ + u64 dir_index; /* the fsync log has some corner cases that mean we have to check * directories to see if any unlinks have been done before @@ -141,99 +301,377 @@ struct btrfs_inode { */ u64 last_unlink_trans; - /* - * Number of bytes outstanding that are going to need csums. This is - * used in ENOSPC accounting. - */ - u64 csum_bytes; - - /* flags field from the on disk inode */ + union { + /* + * The id/generation of the last transaction where this inode + * was either the source or the destination of a clone/dedupe + * operation. Used when logging an inode to know if there are + * shared extents that need special care when logging checksum + * items, to avoid duplicate checksum items in a log (which can + * lead to a corruption where we end up with missing checksum + * ranges after log replay). Protected by the VFS inode lock. + * Used for regular files only. + */ + u64 last_reflink_trans; + + /* + * In case this a root stub inode (BTRFS_INODE_ROOT_STUB flag set), + * the ID of that root. + */ + u64 ref_root_id; + }; + + /* Backwards incompatible flags, lower half of inode_item::flags */ u32 flags; + /* Read-only compatibility flags, upper half of inode_item::flags */ + u32 ro_flags; - /* a local copy of root's last_log_commit */ - unsigned long last_log_commit; + struct btrfs_block_rsv block_rsv; - /* - * Counters to keep track of the number of extent item's we may use due - * to delalloc and such. outstanding_extents is the number of extent - * items we think we'll end up using, and reserved_extents is the number - * of extent items we've reserved metadata for. - */ - unsigned outstanding_extents; - unsigned reserved_extents; + struct btrfs_delayed_node *delayed_node; - /* - * always compress this one file - */ - unsigned force_compress; + /* File creation time. */ + u64 i_otime_sec; + u32 i_otime_nsec; - struct btrfs_delayed_node *delayed_node; + /* Hook into fs_info->delayed_iputs */ + struct list_head delayed_iput; + + struct rw_semaphore i_mmap_lock; + +#ifdef CONFIG_FS_VERITY + struct fsverity_info *i_verity_info; +#endif struct inode vfs_inode; }; -extern unsigned char btrfs_filetype_table[]; +static inline u64 btrfs_get_first_dir_index_to_log(const struct btrfs_inode *inode) +{ + return READ_ONCE(inode->first_dir_index_to_log); +} -static inline struct btrfs_inode *BTRFS_I(struct inode *inode) +static inline void btrfs_set_first_dir_index_to_log(struct btrfs_inode *inode, + u64 index) { - return container_of(inode, struct btrfs_inode, vfs_inode); + WRITE_ONCE(inode->first_dir_index_to_log, index); } -static inline u64 btrfs_ino(struct inode *inode) +/* Type checked and const-preserving VFS inode -> btrfs inode. */ +#define BTRFS_I(_inode) \ + _Generic(_inode, \ + struct inode *: container_of(_inode, struct btrfs_inode, vfs_inode), \ + const struct inode *: (const struct btrfs_inode *)container_of( \ + _inode, const struct btrfs_inode, vfs_inode)) + +static inline unsigned long btrfs_inode_hash(u64 objectid, + const struct btrfs_root *root) { - u64 ino = BTRFS_I(inode)->location.objectid; + u64 h = objectid ^ (root->root_key.objectid * GOLDEN_RATIO_PRIME); - /* - * !ino: btree_inode - * type == BTRFS_ROOT_ITEM_KEY: subvol dir - */ - if (!ino || BTRFS_I(inode)->location.type == BTRFS_ROOT_ITEM_KEY) - ino = inode->i_ino; +#if BITS_PER_LONG == 32 + h = (h >> 32) ^ (h & 0xffffffff); +#endif + + return (unsigned long)h; +} + +#if BITS_PER_LONG == 32 + +/* + * On 32 bit systems the i_ino of struct inode is 32 bits (unsigned long), so + * we use the inode's location objectid which is a u64 to avoid truncation. + */ +static inline u64 btrfs_ino(const struct btrfs_inode *inode) +{ + u64 ino = inode->objectid; + + if (test_bit(BTRFS_INODE_ROOT_STUB, &inode->runtime_flags)) + ino = inode->vfs_inode.i_ino; return ino; } -static inline void btrfs_i_size_write(struct inode *inode, u64 size) +#else + +static inline u64 btrfs_ino(const struct btrfs_inode *inode) +{ + return inode->vfs_inode.i_ino; +} + +#endif + +static inline void btrfs_get_inode_key(const struct btrfs_inode *inode, + struct btrfs_key *key) +{ + key->objectid = btrfs_ino(inode); + key->type = BTRFS_INODE_ITEM_KEY; + key->offset = 0; +} + +static inline void btrfs_set_inode_number(struct btrfs_inode *inode, u64 ino) +{ +#if BITS_PER_LONG == 32 + inode->objectid = ino; +#endif + inode->vfs_inode.i_ino = ino; +} + +static inline void btrfs_i_size_write(struct btrfs_inode *inode, u64 size) +{ + i_size_write(&inode->vfs_inode, size); + inode->disk_i_size = size; +} + +static inline bool btrfs_is_free_space_inode(const struct btrfs_inode *inode) { - i_size_write(inode, size); - BTRFS_I(inode)->disk_i_size = size; + return test_bit(BTRFS_INODE_FREE_SPACE_INODE, &inode->runtime_flags); } -static inline bool btrfs_is_free_space_inode(struct inode *inode) +static inline bool is_data_inode(const struct btrfs_inode *inode) { - struct btrfs_root *root = BTRFS_I(inode)->root; + return btrfs_ino(inode) != BTRFS_BTREE_INODE_OBJECTID; +} - if (root == root->fs_info->tree_root && - btrfs_ino(inode) != BTRFS_BTREE_INODE_OBJECTID) - return true; - if (BTRFS_I(inode)->location.objectid == BTRFS_FREE_INO_OBJECTID) - return true; - return false; +static inline void btrfs_mod_outstanding_extents(struct btrfs_inode *inode, + int mod) +{ + lockdep_assert_held(&inode->lock); + inode->outstanding_extents += mod; + if (btrfs_is_free_space_inode(inode)) + return; + trace_btrfs_inode_mod_outstanding_extents(inode->root, btrfs_ino(inode), + mod, inode->outstanding_extents); } -static inline int btrfs_inode_in_log(struct inode *inode, u64 generation) +/* + * Called every time after doing a buffered, direct IO or memory mapped write. + * + * This is to ensure that if we write to a file that was previously fsynced in + * the current transaction, then try to fsync it again in the same transaction, + * we will know that there were changes in the file and that it needs to be + * logged. + */ +static inline void btrfs_set_inode_last_sub_trans(struct btrfs_inode *inode) { - if (BTRFS_I(inode)->logged_trans == generation && - BTRFS_I(inode)->last_sub_trans <= BTRFS_I(inode)->last_log_commit) - return 1; - return 0; + spin_lock(&inode->lock); + inode->last_sub_trans = inode->root->log_transid; + spin_unlock(&inode->lock); } /* - * Disable DIO read nolock optimization, so new dio readers will be forced - * to grab i_mutex. It is used to avoid the endless truncate due to - * nonlocked dio read. + * Should be called while holding the inode's VFS lock in exclusive mode, or + * while holding the inode's mmap lock (struct btrfs_inode::i_mmap_lock) in + * either shared or exclusive mode, or in a context where no one else can access + * the inode concurrently (during inode creation or when loading an inode from + * disk). */ -static inline void btrfs_inode_block_unlocked_dio(struct inode *inode) +static inline void btrfs_set_inode_full_sync(struct btrfs_inode *inode) { - set_bit(BTRFS_INODE_READDIO_NEED_LOCK, &BTRFS_I(inode)->runtime_flags); - smp_mb(); + set_bit(BTRFS_INODE_NEEDS_FULL_SYNC, &inode->runtime_flags); + /* + * The inode may have been part of a reflink operation in the last + * transaction that modified it, and then a fsync has reset the + * last_reflink_trans to avoid subsequent fsyncs in the same + * transaction to do unnecessary work. So update last_reflink_trans + * to the last_trans value (we have to be pessimistic and assume a + * reflink happened). + * + * The ->last_trans is protected by the inode's spinlock and we can + * have a concurrent ordered extent completion update it. Also set + * last_reflink_trans to ->last_trans only if the former is less than + * the later, because we can be called in a context where + * last_reflink_trans was set to the current transaction generation + * while ->last_trans was not yet updated in the current transaction, + * and therefore has a lower value. + */ + spin_lock(&inode->lock); + if (inode->last_reflink_trans < inode->last_trans) + inode->last_reflink_trans = inode->last_trans; + spin_unlock(&inode->lock); } -static inline void btrfs_inode_resume_unlocked_dio(struct inode *inode) +static inline bool btrfs_inode_in_log(struct btrfs_inode *inode, u64 generation) { - smp_mb__before_clear_bit(); - clear_bit(BTRFS_INODE_READDIO_NEED_LOCK, - &BTRFS_I(inode)->runtime_flags); + bool ret = false; + + spin_lock(&inode->lock); + if (inode->logged_trans == generation && + inode->last_sub_trans <= inode->last_log_commit && + inode->last_sub_trans <= btrfs_get_root_last_log_commit(inode->root)) + ret = true; + spin_unlock(&inode->lock); + return ret; } +/* + * Check if the inode has flags compatible with compression + */ +static inline bool btrfs_inode_can_compress(const struct btrfs_inode *inode) +{ + if (inode->flags & BTRFS_INODE_NODATACOW || + inode->flags & BTRFS_INODE_NODATASUM) + return false; + return true; +} + +static inline void btrfs_assert_inode_locked(struct btrfs_inode *inode) +{ + /* Immediately trigger a crash if the inode is not locked. */ + ASSERT(inode_is_locked(&inode->vfs_inode)); + /* Trigger a splat in dmesg if this task is not holding the lock. */ + lockdep_assert_held(&inode->vfs_inode.i_rwsem); +} + +static inline void btrfs_update_inode_mapping_flags(struct btrfs_inode *inode) +{ + if (inode->flags & BTRFS_INODE_NODATASUM) + mapping_clear_stable_writes(inode->vfs_inode.i_mapping); + else + mapping_set_stable_writes(inode->vfs_inode.i_mapping); +} + +static inline void btrfs_set_inode_mapping_order(struct btrfs_inode *inode) +{ + /* Metadata inode should not reach here. */ + ASSERT(is_data_inode(inode)); + + /* We only allow BITS_PER_LONGS blocks for each bitmap. */ +#ifdef CONFIG_BTRFS_EXPERIMENTAL + mapping_set_folio_order_range(inode->vfs_inode.i_mapping, + inode->root->fs_info->block_min_order, + inode->root->fs_info->block_max_order); +#endif +} + +void btrfs_calculate_block_csum_folio(struct btrfs_fs_info *fs_info, + const phys_addr_t paddr, u8 *dest); +void btrfs_calculate_block_csum_pages(struct btrfs_fs_info *fs_info, + const phys_addr_t paddrs[], u8 *dest); +int btrfs_check_block_csum(struct btrfs_fs_info *fs_info, phys_addr_t paddr, u8 *csum, + const u8 * const csum_expected); +bool btrfs_data_csum_ok(struct btrfs_bio *bbio, struct btrfs_device *dev, + u32 bio_offset, const phys_addr_t paddrs[]); +noinline int can_nocow_extent(struct btrfs_inode *inode, u64 offset, u64 *len, + struct btrfs_file_extent *file_extent, + bool nowait); + +void btrfs_del_delalloc_inode(struct btrfs_inode *inode); +struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); +int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index); +int btrfs_unlink_inode(struct btrfs_trans_handle *trans, + struct btrfs_inode *dir, struct btrfs_inode *inode, + const struct fscrypt_str *name); +int btrfs_add_link(struct btrfs_trans_handle *trans, + struct btrfs_inode *parent_inode, struct btrfs_inode *inode, + const struct fscrypt_str *name, bool add_backref, u64 index); +int btrfs_delete_subvolume(struct btrfs_inode *dir, struct dentry *dentry); +int btrfs_truncate_block(struct btrfs_inode *inode, u64 offset, u64 start, u64 end); + +int btrfs_start_delalloc_snapshot(struct btrfs_root *root, bool in_reclaim_context); +int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, long nr, + bool in_reclaim_context); +int btrfs_set_extent_delalloc(struct btrfs_inode *inode, u64 start, u64 end, + unsigned int extra_bits, + struct extent_state **cached_state); + +struct btrfs_new_inode_args { + /* Input */ + struct inode *dir; + struct dentry *dentry; + struct inode *inode; + bool orphan; + bool subvol; + + /* Output from btrfs_new_inode_prepare(), input to btrfs_create_new_inode(). */ + struct posix_acl *default_acl; + struct posix_acl *acl; + struct fscrypt_name fname; +}; + +int btrfs_new_inode_prepare(struct btrfs_new_inode_args *args, + unsigned int *trans_num_items); +int btrfs_create_new_inode(struct btrfs_trans_handle *trans, + struct btrfs_new_inode_args *args); +void btrfs_new_inode_args_destroy(struct btrfs_new_inode_args *args); +struct inode *btrfs_new_subvol_inode(struct mnt_idmap *idmap, + struct inode *dir); + void btrfs_set_delalloc_extent(struct btrfs_inode *inode, struct extent_state *state, + u32 bits); +void btrfs_clear_delalloc_extent(struct btrfs_inode *inode, + struct extent_state *state, u32 bits); +void btrfs_merge_delalloc_extent(struct btrfs_inode *inode, struct extent_state *new, + struct extent_state *other); +void btrfs_split_delalloc_extent(struct btrfs_inode *inode, + struct extent_state *orig, u64 split); +void btrfs_evict_inode(struct inode *inode); +struct inode *btrfs_alloc_inode(struct super_block *sb); +void btrfs_destroy_inode(struct inode *inode); +void btrfs_free_inode(struct inode *inode); +int btrfs_drop_inode(struct inode *inode); +int __init btrfs_init_cachep(void); +void __cold btrfs_destroy_cachep(void); +struct btrfs_inode *btrfs_iget_path(u64 ino, struct btrfs_root *root, + struct btrfs_path *path); +struct btrfs_inode *btrfs_iget(u64 ino, struct btrfs_root *root); +struct extent_map *btrfs_get_extent(struct btrfs_inode *inode, + struct folio *folio, u64 start, u64 len); +int btrfs_update_inode(struct btrfs_trans_handle *trans, + struct btrfs_inode *inode); +int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans, + struct btrfs_inode *inode); +int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct btrfs_inode *inode); +int btrfs_orphan_cleanup(struct btrfs_root *root); +int btrfs_cont_expand(struct btrfs_inode *inode, loff_t oldsize, loff_t size); +void btrfs_add_delayed_iput(struct btrfs_inode *inode); +void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info); +int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info *fs_info); +int btrfs_prealloc_file_range(struct inode *inode, int mode, + u64 start, u64 num_bytes, u64 min_size, + loff_t actual_len, u64 *alloc_hint); +int btrfs_prealloc_file_range_trans(struct inode *inode, + struct btrfs_trans_handle *trans, int mode, + u64 start, u64 num_bytes, u64 min_size, + loff_t actual_len, u64 *alloc_hint); +int btrfs_run_delalloc_range(struct btrfs_inode *inode, struct folio *locked_folio, + u64 start, u64 end, struct writeback_control *wbc); +int btrfs_writepage_cow_fixup(struct folio *folio); +int btrfs_encoded_io_compression_from_extent(struct btrfs_fs_info *fs_info, + int compress_type); +int btrfs_encoded_read_regular_fill_pages(struct btrfs_inode *inode, + u64 disk_bytenr, u64 disk_io_size, + struct page **pages, void *uring_ctx); +ssize_t btrfs_encoded_read(struct kiocb *iocb, struct iov_iter *iter, + struct btrfs_ioctl_encoded_io_args *encoded, + struct extent_state **cached_state, + u64 *disk_bytenr, u64 *disk_io_size); +ssize_t btrfs_encoded_read_regular(struct kiocb *iocb, struct iov_iter *iter, + u64 start, u64 lockend, + struct extent_state **cached_state, + u64 disk_bytenr, u64 disk_io_size, + size_t count, bool compressed, bool *unlocked); +ssize_t btrfs_do_encoded_write(struct kiocb *iocb, struct iov_iter *from, + const struct btrfs_ioctl_encoded_io_args *encoded); + +struct btrfs_inode *btrfs_find_first_inode(struct btrfs_root *root, u64 min_ino); + +extern const struct dentry_operations btrfs_dentry_operations; + +/* Inode locking type flags, by default the exclusive lock is taken. */ +enum btrfs_ilock_type { + ENUM_BIT(BTRFS_ILOCK_SHARED), + ENUM_BIT(BTRFS_ILOCK_TRY), + ENUM_BIT(BTRFS_ILOCK_MMAP), +}; + +int btrfs_inode_lock(struct btrfs_inode *inode, unsigned int ilock_flags); +void btrfs_inode_unlock(struct btrfs_inode *inode, unsigned int ilock_flags); +void btrfs_update_inode_bytes(struct btrfs_inode *inode, const u64 add_bytes, + const u64 del_bytes); +void btrfs_assert_inode_range_clean(struct btrfs_inode *inode, u64 start, u64 end); +u64 btrfs_get_extent_allocation_hint(struct btrfs_inode *inode, u64 start, + u64 num_bytes); +struct extent_map *btrfs_create_io_em(struct btrfs_inode *inode, u64 start, + const struct btrfs_file_extent *file_extent, + int type); + #endif |