From: Chris Mason Date: Wed, 20 Feb 2013 19:05:45 +0000 (-0500) Subject: Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/josef/btrfs... X-Git-Tag: v3.9-rc1~17^2~29 X-Git-Url: http://pileus.org/git/?a=commitdiff_plain;h=b2c6b3e0611c58fbeb6b9c0892b6249f7bdfaf6b;hp=19f949f52599ba7c3f67a5897ac6be14bfcb1200;p=~andy%2Flinux Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/josef/btrfs-next into for-linus-3.9 Signed-off-by: Chris Mason Conflicts: fs/btrfs/disk-io.c --- diff --git a/fs/btrfs/backref.h b/fs/btrfs/backref.h index d61feca7945..310a7f6d09b 100644 --- a/fs/btrfs/backref.h +++ b/fs/btrfs/backref.h @@ -19,7 +19,7 @@ #ifndef __BTRFS_BACKREF__ #define __BTRFS_BACKREF__ -#include "ioctl.h" +#include #include "ulist.h" #include "extent_io.h" diff --git a/fs/btrfs/btrfs_inode.h b/fs/btrfs/btrfs_inode.h index 2a8c242bc4f..d9b97d4960e 100644 --- a/fs/btrfs/btrfs_inode.h +++ b/fs/btrfs/btrfs_inode.h @@ -40,6 +40,8 @@ #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 /* in memory btrfs inode */ struct btrfs_inode { @@ -216,4 +218,22 @@ static inline int btrfs_inode_in_log(struct inode *inode, u64 generation) return 0; } +/* + * 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. + */ +static inline void btrfs_inode_block_unlocked_dio(struct inode *inode) +{ + set_bit(BTRFS_INODE_READDIO_NEED_LOCK, &BTRFS_I(inode)->runtime_flags); + smp_mb(); +} + +static inline void btrfs_inode_resume_unlocked_dio(struct inode *inode) +{ + smp_mb__before_clear_bit(); + clear_bit(BTRFS_INODE_READDIO_NEED_LOCK, + &BTRFS_I(inode)->runtime_flags); +} + #endif diff --git a/fs/btrfs/check-integrity.c b/fs/btrfs/check-integrity.c index 11d47bfb62b..18af6f48781 100644 --- a/fs/btrfs/check-integrity.c +++ b/fs/btrfs/check-integrity.c @@ -813,8 +813,7 @@ static int btrfsic_process_superblock_dev_mirror( (bh->b_data + (dev_bytenr & 4095)); if (btrfs_super_bytenr(super_tmp) != dev_bytenr || - strncmp((char *)(&(super_tmp->magic)), BTRFS_MAGIC, - sizeof(super_tmp->magic)) || + super_tmp->magic != cpu_to_le64(BTRFS_MAGIC) || memcmp(device->uuid, super_tmp->dev_item.uuid, BTRFS_UUID_SIZE) || btrfs_super_nodesize(super_tmp) != state->metablock_size || btrfs_super_leafsize(super_tmp) != state->metablock_size || diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c index eea5da7a2b9..ecd25a1b4e5 100644 --- a/fs/btrfs/ctree.c +++ b/fs/btrfs/ctree.c @@ -1138,6 +1138,7 @@ __tree_mod_log_rewind(struct extent_buffer *eb, u64 time_seq, switch (tm->op) { case MOD_LOG_KEY_REMOVE_WHILE_FREEING: BUG_ON(tm->slot < n); + /* Fallthrough */ case MOD_LOG_KEY_REMOVE_WHILE_MOVING: case MOD_LOG_KEY_REMOVE: btrfs_set_node_key(eb, &tm->key, tm->slot); @@ -1222,7 +1223,7 @@ tree_mod_log_rewind(struct btrfs_fs_info *fs_info, struct extent_buffer *eb, __tree_mod_log_rewind(eb_rewin, time_seq, tm); WARN_ON(btrfs_header_nritems(eb_rewin) > - BTRFS_NODEPTRS_PER_BLOCK(fs_info->fs_root)); + BTRFS_NODEPTRS_PER_BLOCK(fs_info->tree_root)); return eb_rewin; } @@ -1441,7 +1442,7 @@ int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2) */ int btrfs_realloc_node(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct extent_buffer *parent, - int start_slot, int cache_only, u64 *last_ret, + int start_slot, u64 *last_ret, struct btrfs_key *progress) { struct extent_buffer *cur; @@ -1461,8 +1462,6 @@ int btrfs_realloc_node(struct btrfs_trans_handle *trans, struct btrfs_disk_key disk_key; parent_level = btrfs_header_level(parent); - if (cache_only && parent_level != 1) - return 0; WARN_ON(trans->transaction != root->fs_info->running_transaction); WARN_ON(trans->transid != root->fs_info->generation); @@ -1508,10 +1507,6 @@ int btrfs_realloc_node(struct btrfs_trans_handle *trans, else uptodate = 0; if (!cur || !uptodate) { - if (cache_only) { - free_extent_buffer(cur); - continue; - } if (!cur) { cur = read_tree_block(root, blocknr, blocksize, gen); @@ -4825,8 +4820,8 @@ int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path) /* * A helper function to walk down the tree starting at min_key, and looking - * for nodes or leaves that are either in cache or have a minimum - * transaction id. This is used by the btree defrag code, and tree logging + * for nodes or leaves that are have a minimum transaction id. + * This is used by the btree defrag code, and tree logging * * This does not cow, but it does stuff the starting key it finds back * into min_key, so you can call btrfs_search_slot with cow=1 on the @@ -4847,7 +4842,7 @@ int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path) */ int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key, struct btrfs_key *max_key, - struct btrfs_path *path, int cache_only, + struct btrfs_path *path, u64 min_trans) { struct extent_buffer *cur; @@ -4887,15 +4882,12 @@ again: if (sret && slot > 0) slot--; /* - * check this node pointer against the cache_only and - * min_trans parameters. If it isn't in cache or is too - * old, skip to the next one. + * check this node pointer against the min_trans parameters. + * If it is too old, old, skip to the next one. */ while (slot < nritems) { u64 blockptr; u64 gen; - struct extent_buffer *tmp; - struct btrfs_disk_key disk_key; blockptr = btrfs_node_blockptr(cur, slot); gen = btrfs_node_ptr_generation(cur, slot); @@ -4903,27 +4895,7 @@ again: slot++; continue; } - if (!cache_only) - break; - - if (max_key) { - btrfs_node_key(cur, &disk_key, slot); - if (comp_keys(&disk_key, max_key) >= 0) { - ret = 1; - goto out; - } - } - - tmp = btrfs_find_tree_block(root, blockptr, - btrfs_level_size(root, level - 1)); - - if (tmp && btrfs_buffer_uptodate(tmp, gen, 1) > 0) { - free_extent_buffer(tmp); - break; - } - if (tmp) - free_extent_buffer(tmp); - slot++; + break; } find_next_key: /* @@ -4934,7 +4906,7 @@ find_next_key: path->slots[level] = slot; btrfs_set_path_blocking(path); sret = btrfs_find_next_key(root, path, min_key, level, - cache_only, min_trans); + min_trans); if (sret == 0) { btrfs_release_path(path); goto again; @@ -5399,8 +5371,7 @@ out: /* * this is similar to btrfs_next_leaf, but does not try to preserve * and fixup the path. It looks for and returns the next key in the - * tree based on the current path and the cache_only and min_trans - * parameters. + * tree based on the current path and the min_trans parameters. * * 0 is returned if another key is found, < 0 if there are any errors * and 1 is returned if there are no higher keys in the tree @@ -5409,8 +5380,7 @@ out: * calling this function. */ int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path, - struct btrfs_key *key, int level, - int cache_only, u64 min_trans) + struct btrfs_key *key, int level, u64 min_trans) { int slot; struct extent_buffer *c; @@ -5461,22 +5431,8 @@ next: if (level == 0) btrfs_item_key_to_cpu(c, key, slot); else { - u64 blockptr = btrfs_node_blockptr(c, slot); u64 gen = btrfs_node_ptr_generation(c, slot); - if (cache_only) { - struct extent_buffer *cur; - cur = btrfs_find_tree_block(root, blockptr, - btrfs_level_size(root, level - 1)); - if (!cur || - btrfs_buffer_uptodate(cur, gen, 1) <= 0) { - slot++; - if (cur) - free_extent_buffer(cur); - goto next; - } - free_extent_buffer(cur); - } if (gen < min_trans) { slot++; goto next; diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 547b7b05727..1679051f4d3 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -31,10 +31,10 @@ #include #include #include +#include #include "extent_io.h" #include "extent_map.h" #include "async-thread.h" -#include "ioctl.h" struct btrfs_trans_handle; struct btrfs_transaction; @@ -46,7 +46,7 @@ extern struct kmem_cache *btrfs_path_cachep; extern struct kmem_cache *btrfs_free_space_cachep; struct btrfs_ordered_sum; -#define BTRFS_MAGIC "_BHRfS_M" +#define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */ #define BTRFS_MAX_MIRRORS 3 @@ -191,6 +191,8 @@ static int btrfs_csum_sizes[] = { 4, 0 }; /* ioprio of readahead is set to idle */ #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0)) +#define BTRFS_DIRTY_METADATA_THRESH (32 * 1024 * 1024) + /* * The key defines the order in the tree, and so it also defines (optimal) * block layout. @@ -336,7 +338,9 @@ static inline unsigned long btrfs_chunk_item_size(int num_stripes) /* * File system states */ +#define BTRFS_FS_STATE_ERROR 0 +/* Super block flags */ /* Errors detected */ #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2) @@ -953,7 +957,15 @@ struct btrfs_dev_replace_item { #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5) #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6) #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE -#define BTRFS_NR_RAID_TYPES 5 + +enum btrfs_raid_types { + BTRFS_RAID_RAID10, + BTRFS_RAID_RAID1, + BTRFS_RAID_DUP, + BTRFS_RAID_RAID0, + BTRFS_RAID_SINGLE, + BTRFS_NR_RAID_TYPES +}; #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \ BTRFS_BLOCK_GROUP_SYSTEM | \ @@ -1225,6 +1237,11 @@ struct seq_list { u64 seq; }; +enum btrfs_orphan_cleanup_state { + ORPHAN_CLEANUP_STARTED = 1, + ORPHAN_CLEANUP_DONE = 2, +}; + /* fs_info */ struct reloc_control; struct btrfs_device; @@ -1250,6 +1267,7 @@ struct btrfs_fs_info { /* block group cache stuff */ spinlock_t block_group_cache_lock; + u64 first_logical_byte; struct rb_root block_group_cache_tree; /* keep track of unallocated space */ @@ -1288,7 +1306,23 @@ struct btrfs_fs_info { u64 last_trans_log_full_commit; unsigned long mount_opt; unsigned long compress_type:4; + /* + * It is a suggestive number, the read side is safe even it gets a + * wrong number because we will write out the data into a regular + * extent. The write side(mount/remount) is under ->s_umount lock, + * so it is also safe. + */ u64 max_inline; + /* + * Protected by ->chunk_mutex and sb->s_umount. + * + * The reason that we use two lock to protect it is because only + * remount and mount operations can change it and these two operations + * are under sb->s_umount, but the read side (chunk allocation) can not + * acquire sb->s_umount or the deadlock would happen. So we use two + * locks to protect it. On the write side, we must acquire two locks, + * and on the read side, we just need acquire one of them. + */ u64 alloc_start; struct btrfs_transaction *running_transaction; wait_queue_head_t transaction_throttle; @@ -1365,6 +1399,7 @@ struct btrfs_fs_info { */ struct list_head ordered_extents; + spinlock_t delalloc_lock; /* * all of the inodes that have delalloc bytes. It is possible for * this list to be empty even when there is still dirty data=ordered @@ -1372,13 +1407,6 @@ struct btrfs_fs_info { */ struct list_head delalloc_inodes; - /* - * special rename and truncate targets that must be on disk before - * we're allowed to commit. This is basically the ext3 style - * data=ordered list. - */ - struct list_head ordered_operations; - /* * there is a pool of worker threads for checksumming during writes * and a pool for checksumming after reads. This is because readers @@ -1423,10 +1451,12 @@ struct btrfs_fs_info { u64 total_pinned; - /* protected by the delalloc lock, used to keep from writing - * metadata until there is a nice batch - */ - u64 dirty_metadata_bytes; + /* used to keep from writing metadata until there is a nice batch */ + struct percpu_counter dirty_metadata_bytes; + struct percpu_counter delalloc_bytes; + s32 dirty_metadata_batch; + s32 delalloc_batch; + struct list_head dirty_cowonly_roots; struct btrfs_fs_devices *fs_devices; @@ -1442,9 +1472,6 @@ struct btrfs_fs_info { struct reloc_control *reloc_ctl; - spinlock_t delalloc_lock; - u64 delalloc_bytes; - /* data_alloc_cluster is only used in ssd mode */ struct btrfs_free_cluster data_alloc_cluster; @@ -1456,6 +1483,8 @@ struct btrfs_fs_info { struct rb_root defrag_inodes; atomic_t defrag_running; + /* Used to protect avail_{data, metadata, system}_alloc_bits */ + seqlock_t profiles_lock; /* * these three are in extended format (availability of single * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other @@ -1520,7 +1549,7 @@ struct btrfs_fs_info { u64 qgroup_seq; /* filesystem state */ - u64 fs_state; + unsigned long fs_state; struct btrfs_delayed_root *delayed_root; @@ -1623,6 +1652,9 @@ struct btrfs_root { struct list_head root_list; + spinlock_t log_extents_lock[2]; + struct list_head logged_list[2]; + spinlock_t orphan_lock; atomic_t orphan_inodes; struct btrfs_block_rsv *orphan_block_rsv; @@ -2936,8 +2968,7 @@ int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans, u64 num_bytes, u64 *refs, u64 *flags); int btrfs_pin_extent(struct btrfs_root *root, u64 bytenr, u64 num, int reserved); -int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans, - struct btrfs_root *root, +int btrfs_pin_extent_for_log_replay(struct btrfs_root *root, u64 bytenr, u64 num_bytes); int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans, struct btrfs_root *root, @@ -3092,10 +3123,10 @@ struct extent_buffer *btrfs_root_node(struct btrfs_root *root); struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root); int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path, struct btrfs_key *key, int lowest_level, - int cache_only, u64 min_trans); + u64 min_trans); int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key, struct btrfs_key *max_key, - struct btrfs_path *path, int cache_only, + struct btrfs_path *path, u64 min_trans); enum btrfs_compare_tree_result { BTRFS_COMPARE_TREE_NEW, @@ -3148,7 +3179,7 @@ int btrfs_search_slot_for_read(struct btrfs_root *root, int find_higher, int return_any); int btrfs_realloc_node(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct extent_buffer *parent, - int start_slot, int cache_only, u64 *last_ret, + int start_slot, u64 *last_ret, struct btrfs_key *progress); void btrfs_release_path(struct btrfs_path *p); struct btrfs_path *btrfs_alloc_path(void); @@ -3543,7 +3574,7 @@ int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode, /* tree-defrag.c */ int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, - struct btrfs_root *root, int cache_only); + struct btrfs_root *root); /* sysfs.c */ int btrfs_init_sysfs(void); @@ -3620,11 +3651,14 @@ __printf(5, 6) void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function, unsigned int line, int errno, const char *fmt, ...); +/* + * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic + * will panic(). Otherwise we BUG() here. + */ #define btrfs_panic(fs_info, errno, fmt, args...) \ do { \ - struct btrfs_fs_info *_i = (fs_info); \ - __btrfs_panic(_i, __func__, __LINE__, errno, fmt, ##args); \ - BUG_ON(!(_i->mount_opt & BTRFS_MOUNT_PANIC_ON_FATAL_ERROR)); \ + __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \ + BUG(); \ } while (0) /* acl.c */ @@ -3745,4 +3779,11 @@ static inline int is_fstree(u64 rootid) return 1; return 0; } + +static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info) +{ + return signal_pending(current); +} + + #endif diff --git a/fs/btrfs/delayed-inode.c b/fs/btrfs/delayed-inode.c index 34836036f01..0b278b117cb 100644 --- a/fs/btrfs/delayed-inode.c +++ b/fs/btrfs/delayed-inode.c @@ -875,7 +875,6 @@ static int btrfs_insert_delayed_item(struct btrfs_trans_handle *trans, struct btrfs_delayed_item *delayed_item) { struct extent_buffer *leaf; - struct btrfs_item *item; char *ptr; int ret; @@ -886,7 +885,6 @@ static int btrfs_insert_delayed_item(struct btrfs_trans_handle *trans, leaf = path->nodes[0]; - item = btrfs_item_nr(leaf, path->slots[0]); ptr = btrfs_item_ptr(leaf, path->slots[0], char); write_extent_buffer(leaf, delayed_item->data, (unsigned long)ptr, @@ -1065,32 +1063,25 @@ static void btrfs_release_delayed_inode(struct btrfs_delayed_node *delayed_node) } } -static int btrfs_update_delayed_inode(struct btrfs_trans_handle *trans, - struct btrfs_root *root, - struct btrfs_path *path, - struct btrfs_delayed_node *node) +static int __btrfs_update_delayed_inode(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + struct btrfs_path *path, + struct btrfs_delayed_node *node) { struct btrfs_key key; struct btrfs_inode_item *inode_item; struct extent_buffer *leaf; int ret; - mutex_lock(&node->mutex); - if (!node->inode_dirty) { - mutex_unlock(&node->mutex); - return 0; - } - key.objectid = node->inode_id; btrfs_set_key_type(&key, BTRFS_INODE_ITEM_KEY); key.offset = 0; + ret = btrfs_lookup_inode(trans, root, path, &key, 1); if (ret > 0) { btrfs_release_path(path); - mutex_unlock(&node->mutex); return -ENOENT; } else if (ret < 0) { - mutex_unlock(&node->mutex); return ret; } @@ -1105,11 +1096,47 @@ static int btrfs_update_delayed_inode(struct btrfs_trans_handle *trans, btrfs_delayed_inode_release_metadata(root, node); btrfs_release_delayed_inode(node); - mutex_unlock(&node->mutex); return 0; } +static inline int btrfs_update_delayed_inode(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + struct btrfs_path *path, + struct btrfs_delayed_node *node) +{ + int ret; + + mutex_lock(&node->mutex); + if (!node->inode_dirty) { + mutex_unlock(&node->mutex); + return 0; + } + + ret = __btrfs_update_delayed_inode(trans, root, path, node); + mutex_unlock(&node->mutex); + return ret; +} + +static inline int +__btrfs_commit_inode_delayed_items(struct btrfs_trans_handle *trans, + struct btrfs_path *path, + struct btrfs_delayed_node *node) +{ + int ret; + + ret = btrfs_insert_delayed_items(trans, path, node->root, node); + if (ret) + return ret; + + ret = btrfs_delete_delayed_items(trans, path, node->root, node); + if (ret) + return ret; + + ret = btrfs_update_delayed_inode(trans, node->root, path, node); + return ret; +} + /* * Called when committing the transaction. * Returns 0 on success. @@ -1119,7 +1146,6 @@ static int btrfs_update_delayed_inode(struct btrfs_trans_handle *trans, static int __btrfs_run_delayed_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, int nr) { - struct btrfs_root *curr_root = root; struct btrfs_delayed_root *delayed_root; struct btrfs_delayed_node *curr_node, *prev_node; struct btrfs_path *path; @@ -1142,15 +1168,8 @@ static int __btrfs_run_delayed_items(struct btrfs_trans_handle *trans, curr_node = btrfs_first_delayed_node(delayed_root); while (curr_node && (!count || (count && nr--))) { - curr_root = curr_node->root; - ret = btrfs_insert_delayed_items(trans, path, curr_root, - curr_node); - if (!ret) - ret = btrfs_delete_delayed_items(trans, path, - curr_root, curr_node); - if (!ret) - ret = btrfs_update_delayed_inode(trans, curr_root, - path, curr_node); + ret = __btrfs_commit_inode_delayed_items(trans, path, + curr_node); if (ret) { btrfs_release_delayed_node(curr_node); curr_node = NULL; @@ -1183,51 +1202,93 @@ int btrfs_run_delayed_items_nr(struct btrfs_trans_handle *trans, return __btrfs_run_delayed_items(trans, root, nr); } -static int __btrfs_commit_inode_delayed_items(struct btrfs_trans_handle *trans, - struct btrfs_delayed_node *node) +int btrfs_commit_inode_delayed_items(struct btrfs_trans_handle *trans, + struct inode *inode) { + struct btrfs_delayed_node *delayed_node = btrfs_get_delayed_node(inode); struct btrfs_path *path; struct btrfs_block_rsv *block_rsv; int ret; + if (!delayed_node) + return 0; + + mutex_lock(&delayed_node->mutex); + if (!delayed_node->count) { + mutex_unlock(&delayed_node->mutex); + btrfs_release_delayed_node(delayed_node); + return 0; + } + mutex_unlock(&delayed_node->mutex); + path = btrfs_alloc_path(); if (!path) return -ENOMEM; path->leave_spinning = 1; block_rsv = trans->block_rsv; - trans->block_rsv = &node->root->fs_info->delayed_block_rsv; + trans->block_rsv = &delayed_node->root->fs_info->delayed_block_rsv; - ret = btrfs_insert_delayed_items(trans, path, node->root, node); - if (!ret) - ret = btrfs_delete_delayed_items(trans, path, node->root, node); - if (!ret) - ret = btrfs_update_delayed_inode(trans, node->root, path, node); - btrfs_free_path(path); + ret = __btrfs_commit_inode_delayed_items(trans, path, delayed_node); + btrfs_release_delayed_node(delayed_node); + btrfs_free_path(path); trans->block_rsv = block_rsv; + return ret; } -int btrfs_commit_inode_delayed_items(struct btrfs_trans_handle *trans, - struct inode *inode) +int btrfs_commit_inode_delayed_inode(struct inode *inode) { + struct btrfs_trans_handle *trans; struct btrfs_delayed_node *delayed_node = btrfs_get_delayed_node(inode); + struct btrfs_path *path; + struct btrfs_block_rsv *block_rsv; int ret; if (!delayed_node) return 0; mutex_lock(&delayed_node->mutex); - if (!delayed_node->count) { + if (!delayed_node->inode_dirty) { mutex_unlock(&delayed_node->mutex); btrfs_release_delayed_node(delayed_node); return 0; } mutex_unlock(&delayed_node->mutex); - ret = __btrfs_commit_inode_delayed_items(trans, delayed_node); + trans = btrfs_join_transaction(delayed_node->root); + if (IS_ERR(trans)) { + ret = PTR_ERR(trans); + goto out; + } + + path = btrfs_alloc_path(); + if (!path) { + ret = -ENOMEM; + goto trans_out; + } + path->leave_spinning = 1; + + block_rsv = trans->block_rsv; + trans->block_rsv = &delayed_node->root->fs_info->delayed_block_rsv; + + mutex_lock(&delayed_node->mutex); + if (delayed_node->inode_dirty) + ret = __btrfs_update_delayed_inode(trans, delayed_node->root, + path, delayed_node); + else + ret = 0; + mutex_unlock(&delayed_node->mutex); + + btrfs_free_path(path); + trans->block_rsv = block_rsv; +trans_out: + btrfs_end_transaction(trans, delayed_node->root); + btrfs_btree_balance_dirty(delayed_node->root); +out: btrfs_release_delayed_node(delayed_node); + return ret; } @@ -1258,7 +1319,6 @@ static void btrfs_async_run_delayed_node_done(struct btrfs_work *work) struct btrfs_root *root; struct btrfs_block_rsv *block_rsv; int need_requeue = 0; - int ret; async_node = container_of(work, struct btrfs_async_delayed_node, work); @@ -1277,14 +1337,7 @@ static void btrfs_async_run_delayed_node_done(struct btrfs_work *work) block_rsv = trans->block_rsv; trans->block_rsv = &root->fs_info->delayed_block_rsv; - ret = btrfs_insert_delayed_items(trans, path, root, delayed_node); - if (!ret) - ret = btrfs_delete_delayed_items(trans, path, root, - delayed_node); - - if (!ret) - btrfs_update_delayed_inode(trans, root, path, delayed_node); - + __btrfs_commit_inode_delayed_items(trans, path, delayed_node); /* * Maybe new delayed items have been inserted, so we need requeue * the work. Besides that, we must dequeue the empty delayed nodes diff --git a/fs/btrfs/delayed-inode.h b/fs/btrfs/delayed-inode.h index 4f808e1baee..78b6ad0fc66 100644 --- a/fs/btrfs/delayed-inode.h +++ b/fs/btrfs/delayed-inode.h @@ -117,6 +117,7 @@ int btrfs_commit_inode_delayed_items(struct btrfs_trans_handle *trans, /* Used for evicting the inode. */ void btrfs_remove_delayed_node(struct inode *inode); void btrfs_kill_delayed_inode_items(struct inode *inode); +int btrfs_commit_inode_delayed_inode(struct inode *inode); int btrfs_delayed_update_inode(struct btrfs_trans_handle *trans, diff --git a/fs/btrfs/delayed-ref.c b/fs/btrfs/delayed-ref.c index ae941177339..b7a0641ead7 100644 --- a/fs/btrfs/delayed-ref.c +++ b/fs/btrfs/delayed-ref.c @@ -23,6 +23,10 @@ #include "delayed-ref.h" #include "transaction.h" +struct kmem_cache *btrfs_delayed_ref_head_cachep; +struct kmem_cache *btrfs_delayed_tree_ref_cachep; +struct kmem_cache *btrfs_delayed_data_ref_cachep; +struct kmem_cache *btrfs_delayed_extent_op_cachep; /* * delayed back reference update tracking. For subvolume trees * we queue up extent allocations and backref maintenance for @@ -422,6 +426,14 @@ again: return 1; } +void btrfs_release_ref_cluster(struct list_head *cluster) +{ + struct list_head *pos, *q; + + list_for_each_safe(pos, q, cluster) + list_del_init(pos); +} + /* * helper function to update an extent delayed ref in the * rbtree. existing and update must both have the same @@ -511,7 +523,7 @@ update_existing_head_ref(struct btrfs_delayed_ref_node *existing, ref->extent_op->flags_to_set; existing_ref->extent_op->update_flags = 1; } - kfree(ref->extent_op); + btrfs_free_delayed_extent_op(ref->extent_op); } } /* @@ -592,7 +604,7 @@ static noinline void add_delayed_ref_head(struct btrfs_fs_info *fs_info, * we've updated the existing ref, free the newly * allocated ref */ - kfree(head_ref); + kmem_cache_free(btrfs_delayed_ref_head_cachep, head_ref); } else { delayed_refs->num_heads++; delayed_refs->num_heads_ready++; @@ -653,7 +665,7 @@ static noinline void add_delayed_tree_ref(struct btrfs_fs_info *fs_info, * we've updated the existing ref, free the newly * allocated ref */ - kfree(full_ref); + kmem_cache_free(btrfs_delayed_tree_ref_cachep, full_ref); } else { delayed_refs->num_entries++; trans->delayed_ref_updates++; @@ -714,7 +726,7 @@ static noinline void add_delayed_data_ref(struct btrfs_fs_info *fs_info, * we've updated the existing ref, free the newly * allocated ref */ - kfree(full_ref); + kmem_cache_free(btrfs_delayed_data_ref_cachep, full_ref); } else { delayed_refs->num_entries++; trans->delayed_ref_updates++; @@ -738,13 +750,13 @@ int btrfs_add_delayed_tree_ref(struct btrfs_fs_info *fs_info, struct btrfs_delayed_ref_root *delayed_refs; BUG_ON(extent_op && extent_op->is_data); - ref = kmalloc(sizeof(*ref), GFP_NOFS); + ref = kmem_cache_alloc(btrfs_delayed_tree_ref_cachep, GFP_NOFS); if (!ref) return -ENOMEM; - head_ref = kmalloc(sizeof(*head_ref), GFP_NOFS); + head_ref = kmem_cache_alloc(btrfs_delayed_ref_head_cachep, GFP_NOFS); if (!head_ref) { - kfree(ref); + kmem_cache_free(btrfs_delayed_tree_ref_cachep, ref); return -ENOMEM; } @@ -786,13 +798,13 @@ int btrfs_add_delayed_data_ref(struct btrfs_fs_info *fs_info, struct btrfs_delayed_ref_root *delayed_refs; BUG_ON(extent_op && !extent_op->is_data); - ref = kmalloc(sizeof(*ref), GFP_NOFS); + ref = kmem_cache_alloc(btrfs_delayed_data_ref_cachep, GFP_NOFS); if (!ref) return -ENOMEM; - head_ref = kmalloc(sizeof(*head_ref), GFP_NOFS); + head_ref = kmem_cache_alloc(btrfs_delayed_ref_head_cachep, GFP_NOFS); if (!head_ref) { - kfree(ref); + kmem_cache_free(btrfs_delayed_data_ref_cachep, ref); return -ENOMEM; } @@ -826,7 +838,7 @@ int btrfs_add_delayed_extent_op(struct btrfs_fs_info *fs_info, struct btrfs_delayed_ref_head *head_ref; struct btrfs_delayed_ref_root *delayed_refs; - head_ref = kmalloc(sizeof(*head_ref), GFP_NOFS); + head_ref = kmem_cache_alloc(btrfs_delayed_ref_head_cachep, GFP_NOFS); if (!head_ref) return -ENOMEM; @@ -860,3 +872,51 @@ btrfs_find_delayed_ref_head(struct btrfs_trans_handle *trans, u64 bytenr) return btrfs_delayed_node_to_head(ref); return NULL; } + +void btrfs_delayed_ref_exit(void) +{ + if (btrfs_delayed_ref_head_cachep) + kmem_cache_destroy(btrfs_delayed_ref_head_cachep); + if (btrfs_delayed_tree_ref_cachep) + kmem_cache_destroy(btrfs_delayed_tree_ref_cachep); + if (btrfs_delayed_data_ref_cachep) + kmem_cache_destroy(btrfs_delayed_data_ref_cachep); + if (btrfs_delayed_extent_op_cachep) + kmem_cache_destroy(btrfs_delayed_extent_op_cachep); +} + +int btrfs_delayed_ref_init(void) +{ + btrfs_delayed_ref_head_cachep = kmem_cache_create( + "btrfs_delayed_ref_head", + sizeof(struct btrfs_delayed_ref_head), 0, + SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD, NULL); + if (!btrfs_delayed_ref_head_cachep) + goto fail; + + btrfs_delayed_tree_ref_cachep = kmem_cache_create( + "btrfs_delayed_tree_ref", + sizeof(struct btrfs_delayed_tree_ref), 0, + SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD, NULL); + if (!btrfs_delayed_tree_ref_cachep) + goto fail; + + btrfs_delayed_data_ref_cachep = kmem_cache_create( + "btrfs_delayed_data_ref", + sizeof(struct btrfs_delayed_data_ref), 0, + SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD, NULL); + if (!btrfs_delayed_data_ref_cachep) + goto fail; + + btrfs_delayed_extent_op_cachep = kmem_cache_create( + "btrfs_delayed_extent_op", + sizeof(struct btrfs_delayed_extent_op), 0, + SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD, NULL); + if (!btrfs_delayed_extent_op_cachep) + goto fail; + + return 0; +fail: + btrfs_delayed_ref_exit(); + return -ENOMEM; +} diff --git a/fs/btrfs/delayed-ref.h b/fs/btrfs/delayed-ref.h index c9d703693df..7939149f8f2 100644 --- a/fs/btrfs/delayed-ref.h +++ b/fs/btrfs/delayed-ref.h @@ -141,12 +141,47 @@ struct btrfs_delayed_ref_root { u64 run_delayed_start; }; +extern struct kmem_cache *btrfs_delayed_ref_head_cachep; +extern struct kmem_cache *btrfs_delayed_tree_ref_cachep; +extern struct kmem_cache *btrfs_delayed_data_ref_cachep; +extern struct kmem_cache *btrfs_delayed_extent_op_cachep; + +int btrfs_delayed_ref_init(void); +void btrfs_delayed_ref_exit(void); + +static inline struct btrfs_delayed_extent_op * +btrfs_alloc_delayed_extent_op(void) +{ + return kmem_cache_alloc(btrfs_delayed_extent_op_cachep, GFP_NOFS); +} + +static inline void +btrfs_free_delayed_extent_op(struct btrfs_delayed_extent_op *op) +{ + if (op) + kmem_cache_free(btrfs_delayed_extent_op_cachep, op); +} + static inline void btrfs_put_delayed_ref(struct btrfs_delayed_ref_node *ref) { WARN_ON(atomic_read(&ref->refs) == 0); if (atomic_dec_and_test(&ref->refs)) { WARN_ON(ref->in_tree); - kfree(ref); + switch (ref->type) { + case BTRFS_TREE_BLOCK_REF_KEY: + case BTRFS_SHARED_BLOCK_REF_KEY: + kmem_cache_free(btrfs_delayed_tree_ref_cachep, ref); + break; + case BTRFS_EXTENT_DATA_REF_KEY: + case BTRFS_SHARED_DATA_REF_KEY: + kmem_cache_free(btrfs_delayed_data_ref_cachep, ref); + break; + case 0: + kmem_cache_free(btrfs_delayed_ref_head_cachep, ref); + break; + default: + BUG(); + } } } @@ -176,8 +211,14 @@ struct btrfs_delayed_ref_head * btrfs_find_delayed_ref_head(struct btrfs_trans_handle *trans, u64 bytenr); int btrfs_delayed_ref_lock(struct btrfs_trans_handle *trans, struct btrfs_delayed_ref_head *head); +static inline void btrfs_delayed_ref_unlock(struct btrfs_delayed_ref_head *head) +{ + mutex_unlock(&head->mutex); +} + int btrfs_find_ref_cluster(struct btrfs_trans_handle *trans, struct list_head *cluster, u64 search_start); +void btrfs_release_ref_cluster(struct list_head *cluster); int btrfs_check_delayed_seq(struct btrfs_fs_info *fs_info, struct btrfs_delayed_ref_root *delayed_refs, diff --git a/fs/btrfs/dev-replace.c b/fs/btrfs/dev-replace.c index 66dbc8dbddf..7ba7b3900cb 100644 --- a/fs/btrfs/dev-replace.c +++ b/fs/btrfs/dev-replace.c @@ -465,7 +465,11 @@ static int btrfs_dev_replace_finishing(struct btrfs_fs_info *fs_info, * flush all outstanding I/O and inode extent mappings before the * copy operation is declared as being finished */ - btrfs_start_delalloc_inodes(root, 0); + ret = btrfs_start_delalloc_inodes(root, 0); + if (ret) { + mutex_unlock(&dev_replace->lock_finishing_cancel_unmount); + return ret; + } btrfs_wait_ordered_extents(root, 0); trans = btrfs_start_transaction(root, 0); diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index a8f652dc940..779b401cd95 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -56,7 +56,8 @@ static void end_workqueue_fn(struct btrfs_work *work); static void free_fs_root(struct btrfs_root *root); static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info, int read_only); -static void btrfs_destroy_ordered_operations(struct btrfs_root *root); +static void btrfs_destroy_ordered_operations(struct btrfs_transaction *t, + struct btrfs_root *root); static void btrfs_destroy_ordered_extents(struct btrfs_root *root); static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, struct btrfs_root *root); @@ -420,7 +421,7 @@ static int btree_read_extent_buffer_pages(struct btrfs_root *root, static int csum_dirty_buffer(struct btrfs_root *root, struct page *page) { struct extent_io_tree *tree; - u64 start = (u64)page->index << PAGE_CACHE_SHIFT; + u64 start = page_offset(page); u64 found_start; struct extent_buffer *eb; @@ -946,18 +947,20 @@ static int btree_writepages(struct address_space *mapping, struct writeback_control *wbc) { struct extent_io_tree *tree; + struct btrfs_fs_info *fs_info; + int ret; + tree = &BTRFS_I(mapping->host)->io_tree; if (wbc->sync_mode == WB_SYNC_NONE) { - struct btrfs_root *root = BTRFS_I(mapping->host)->root; - u64 num_dirty; - unsigned long thresh = 32 * 1024 * 1024; if (wbc->for_kupdate) return 0; + fs_info = BTRFS_I(mapping->host)->root->fs_info; /* this is a bit racy, but that's ok */ - num_dirty = root->fs_info->dirty_metadata_bytes; - if (num_dirty < thresh) + ret = percpu_counter_compare(&fs_info->dirty_metadata_bytes, + BTRFS_DIRTY_METADATA_THRESH); + if (ret < 0) return 0; } return btree_write_cache_pages(mapping, wbc); @@ -1125,24 +1128,16 @@ struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr, void clean_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct extent_buffer *buf) { + struct btrfs_fs_info *fs_info = root->fs_info; + if (btrfs_header_generation(buf) == - root->fs_info->running_transaction->transid) { + fs_info->running_transaction->transid) { btrfs_assert_tree_locked(buf); if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, &buf->bflags)) { - spin_lock(&root->fs_info->delalloc_lock); - if (root->fs_info->dirty_metadata_bytes >= buf->len) - root->fs_info->dirty_metadata_bytes -= buf->len; - else { - spin_unlock(&root->fs_info->delalloc_lock); - btrfs_panic(root->fs_info, -EOVERFLOW, - "Can't clear %lu bytes from " - " dirty_mdatadata_bytes (%llu)", - buf->len, - root->fs_info->dirty_metadata_bytes); - } - spin_unlock(&root->fs_info->delalloc_lock); - + __percpu_counter_add(&fs_info->dirty_metadata_bytes, + -buf->len, + fs_info->dirty_metadata_batch); /* ugh, clear_extent_buffer_dirty needs to lock the page */ btrfs_set_lock_blocking(buf); clear_extent_buffer_dirty(buf); @@ -1178,9 +1173,13 @@ static void __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize, INIT_LIST_HEAD(&root->dirty_list); INIT_LIST_HEAD(&root->root_list); + INIT_LIST_HEAD(&root->logged_list[0]); + INIT_LIST_HEAD(&root->logged_list[1]); spin_lock_init(&root->orphan_lock); spin_lock_init(&root->inode_lock); spin_lock_init(&root->accounting_lock); + spin_lock_init(&root->log_extents_lock[0]); + spin_lock_init(&root->log_extents_lock[1]); mutex_init(&root->objectid_mutex); mutex_init(&root->log_mutex); init_waitqueue_head(&root->log_writer_wait); @@ -2004,10 +2003,24 @@ int open_ctree(struct super_block *sb, goto fail_srcu; } + ret = percpu_counter_init(&fs_info->dirty_metadata_bytes, 0); + if (ret) { + err = ret; + goto fail_bdi; + } + fs_info->dirty_metadata_batch = PAGE_CACHE_SIZE * + (1 + ilog2(nr_cpu_ids)); + + ret = percpu_counter_init(&fs_info->delalloc_bytes, 0); + if (ret) { + err = ret; + goto fail_dirty_metadata_bytes; + } + fs_info->btree_inode = new_inode(sb); if (!fs_info->btree_inode) { err = -ENOMEM; - goto fail_bdi; + goto fail_delalloc_bytes; } mapping_set_gfp_mask(fs_info->btree_inode->i_mapping, GFP_NOFS); @@ -2017,7 +2030,6 @@ int open_ctree(struct super_block *sb, INIT_LIST_HEAD(&fs_info->dead_roots); INIT_LIST_HEAD(&fs_info->delayed_iputs); INIT_LIST_HEAD(&fs_info->delalloc_inodes); - INIT_LIST_HEAD(&fs_info->ordered_operations); INIT_LIST_HEAD(&fs_info->caching_block_groups); spin_lock_init(&fs_info->delalloc_lock); spin_lock_init(&fs_info->trans_lock); @@ -2028,6 +2040,7 @@ int open_ctree(struct super_block *sb, spin_lock_init(&fs_info->tree_mod_seq_lock); rwlock_init(&fs_info->tree_mod_log_lock); mutex_init(&fs_info->reloc_mutex); + seqlock_init(&fs_info->profiles_lock); init_completion(&fs_info->kobj_unregister); INIT_LIST_HEAD(&fs_info->dirty_cowonly_roots); @@ -2126,6 +2139,7 @@ int open_ctree(struct super_block *sb, spin_lock_init(&fs_info->block_group_cache_lock); fs_info->block_group_cache_tree = RB_ROOT; + fs_info->first_logical_byte = (u64)-1; extent_io_tree_init(&fs_info->freed_extents[0], fs_info->btree_inode->i_mapping); @@ -2187,7 +2201,8 @@ int open_ctree(struct super_block *sb, goto fail_alloc; /* check FS state, whether FS is broken. */ - fs_info->fs_state |= btrfs_super_flags(disk_super); + if (btrfs_super_flags(disk_super) & BTRFS_SUPER_FLAG_ERROR) + set_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state); ret = btrfs_check_super_valid(fs_info, sb->s_flags & MS_RDONLY); if (ret) { @@ -2261,6 +2276,8 @@ int open_ctree(struct super_block *sb, leafsize = btrfs_super_leafsize(disk_super); sectorsize = btrfs_super_sectorsize(disk_super); stripesize = btrfs_super_stripesize(disk_super); + fs_info->dirty_metadata_batch = leafsize * (1 + ilog2(nr_cpu_ids)); + fs_info->delalloc_batch = sectorsize * 512 * (1 + ilog2(nr_cpu_ids)); /* * mixed block groups end up with duplicate but slightly offset @@ -2390,8 +2407,7 @@ int open_ctree(struct super_block *sb, sb->s_blocksize = sectorsize; sb->s_blocksize_bits = blksize_bits(sectorsize); - if (strncmp((char *)(&disk_super->magic), BTRFS_MAGIC, - sizeof(disk_super->magic))) { + if (disk_super->magic != cpu_to_le64(BTRFS_MAGIC)) { printk(KERN_INFO "btrfs: valid FS not found on %s\n", sb->s_id); goto fail_sb_buffer; } @@ -2694,13 +2710,13 @@ fail_cleaner: * kthreads */ filemap_write_and_wait(fs_info->btree_inode->i_mapping); - invalidate_inode_pages2(fs_info->btree_inode->i_mapping); fail_block_groups: btrfs_free_block_groups(fs_info); fail_tree_roots: free_root_pointers(fs_info, 1); + invalidate_inode_pages2(fs_info->btree_inode->i_mapping); fail_sb_buffer: btrfs_stop_workers(&fs_info->generic_worker); @@ -2721,8 +2737,11 @@ fail_alloc: fail_iput: btrfs_mapping_tree_free(&fs_info->mapping_tree); - invalidate_inode_pages2(fs_info->btree_inode->i_mapping); iput(fs_info->btree_inode); +fail_delalloc_bytes: + percpu_counter_destroy(&fs_info->delalloc_bytes); +fail_dirty_metadata_bytes: + percpu_counter_destroy(&fs_info->dirty_metadata_bytes); fail_bdi: bdi_destroy(&fs_info->bdi); fail_srcu: @@ -2795,8 +2814,7 @@ struct buffer_head *btrfs_read_dev_super(struct block_device *bdev) super = (struct btrfs_super_block *)bh->b_data; if (btrfs_super_bytenr(super) != bytenr || - strncmp((char *)(&super->magic), BTRFS_MAGIC, - sizeof(super->magic))) { + super->magic != cpu_to_le64(BTRFS_MAGIC)) { brelse(bh); continue; } @@ -3339,7 +3357,7 @@ int close_ctree(struct btrfs_root *root) printk(KERN_ERR "btrfs: commit super ret %d\n", ret); } - if (fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR) + if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) btrfs_error_commit_super(root); btrfs_put_block_group_cache(fs_info); @@ -3352,9 +3370,9 @@ int close_ctree(struct btrfs_root *root) btrfs_free_qgroup_config(root->fs_info); - if (fs_info->delalloc_bytes) { - printk(KERN_INFO "btrfs: at unmount delalloc count %llu\n", - (unsigned long long)fs_info->delalloc_bytes); + if (percpu_counter_sum(&fs_info->delalloc_bytes)) { + printk(KERN_INFO "btrfs: at unmount delalloc count %lld\n", + percpu_counter_sum(&fs_info->delalloc_bytes)); } free_extent_buffer(fs_info->extent_root->node); @@ -3401,6 +3419,8 @@ int close_ctree(struct btrfs_root *root) btrfs_close_devices(fs_info->fs_devices); btrfs_mapping_tree_free(&fs_info->mapping_tree); + percpu_counter_destroy(&fs_info->dirty_metadata_bytes); + percpu_counter_destroy(&fs_info->delalloc_bytes); bdi_destroy(&fs_info->bdi); cleanup_srcu_struct(&fs_info->subvol_srcu); @@ -3443,11 +3463,10 @@ void btrfs_mark_buffer_dirty(struct extent_buffer *buf) (unsigned long long)transid, (unsigned long long)root->fs_info->generation); was_dirty = set_extent_buffer_dirty(buf); - if (!was_dirty) { - spin_lock(&root->fs_info->delalloc_lock); - root->fs_info->dirty_metadata_bytes += buf->len; - spin_unlock(&root->fs_info->delalloc_lock); - } + if (!was_dirty) + __percpu_counter_add(&root->fs_info->dirty_metadata_bytes, + buf->len, + root->fs_info->dirty_metadata_batch); } static void __btrfs_btree_balance_dirty(struct btrfs_root *root, @@ -3457,8 +3476,7 @@ static void __btrfs_btree_balance_dirty(struct btrfs_root *root, * looks as though older kernels can get into trouble with * this code, they end up stuck in balance_dirty_pages forever */ - u64 num_dirty; - unsigned long thresh = 32 * 1024 * 1024; + int ret; if (current->flags & PF_MEMALLOC) return; @@ -3466,9 +3484,9 @@ static void __btrfs_btree_balance_dirty(struct btrfs_root *root, if (flush_delayed) btrfs_balance_delayed_items(root); - num_dirty = root->fs_info->dirty_metadata_bytes; - - if (num_dirty > thresh) { + ret = percpu_counter_compare(&root->fs_info->dirty_metadata_bytes, + BTRFS_DIRTY_METADATA_THRESH); + if (ret > 0) { balance_dirty_pages_ratelimited( root->fs_info->btree_inode->i_mapping); } @@ -3518,7 +3536,8 @@ void btrfs_error_commit_super(struct btrfs_root *root) btrfs_cleanup_transaction(root); } -static void btrfs_destroy_ordered_operations(struct btrfs_root *root) +static void btrfs_destroy_ordered_operations(struct btrfs_transaction *t, + struct btrfs_root *root) { struct btrfs_inode *btrfs_inode; struct list_head splice; @@ -3528,7 +3547,7 @@ static void btrfs_destroy_ordered_operations(struct btrfs_root *root) mutex_lock(&root->fs_info->ordered_operations_mutex); spin_lock(&root->fs_info->ordered_extent_lock); - list_splice_init(&root->fs_info->ordered_operations, &splice); + list_splice_init(&t->ordered_operations, &splice); while (!list_empty(&splice)) { btrfs_inode = list_entry(splice.next, struct btrfs_inode, ordered_operations); @@ -3544,35 +3563,16 @@ static void btrfs_destroy_ordered_operations(struct btrfs_root *root) static void btrfs_destroy_ordered_extents(struct btrfs_root *root) { - struct list_head splice; struct btrfs_ordered_extent *ordered; - struct inode *inode; - - INIT_LIST_HEAD(&splice); spin_lock(&root->fs_info->ordered_extent_lock); - - list_splice_init(&root->fs_info->ordered_extents, &splice); - while (!list_empty(&splice)) { - ordered = list_entry(splice.next, struct btrfs_ordered_extent, - root_extent_list); - - list_del_init(&ordered->root_extent_list); - atomic_inc(&ordered->refs); - - /* the inode may be getting freed (in sys_unlink path). */ - inode = igrab(ordered->inode); - - spin_unlock(&root->fs_info->ordered_extent_lock); - if (inode) - iput(inode); - - atomic_set(&ordered->refs, 1); - btrfs_put_ordered_extent(ordered); - - spin_lock(&root->fs_info->ordered_extent_lock); - } - + /* + * This will just short circuit the ordered completion stuff which will + * make sure the ordered extent gets properly cleaned up. + */ + list_for_each_entry(ordered, &root->fs_info->ordered_extents, + root_extent_list) + set_bit(BTRFS_ORDERED_IOERR, &ordered->flags); spin_unlock(&root->fs_info->ordered_extent_lock); } @@ -3594,11 +3594,11 @@ int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, } while ((node = rb_first(&delayed_refs->root)) != NULL) { - ref = rb_entry(node, struct btrfs_delayed_ref_node, rb_node); + struct btrfs_delayed_ref_head *head = NULL; + ref = rb_entry(node, struct btrfs_delayed_ref_node, rb_node); atomic_set(&ref->refs, 1); if (btrfs_delayed_ref_is_head(ref)) { - struct btrfs_delayed_ref_head *head; head = btrfs_delayed_node_to_head(ref); if (!mutex_trylock(&head->mutex)) { @@ -3614,16 +3614,18 @@ int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, continue; } - kfree(head->extent_op); + btrfs_free_delayed_extent_op(head->extent_op); delayed_refs->num_heads--; if (list_empty(&head->cluster)) delayed_refs->num_heads_ready--; list_del_init(&head->cluster); } + ref->in_tree = 0; rb_erase(&ref->rb_node, &delayed_refs->root); delayed_refs->num_entries--; - + if (head) + mutex_unlock(&head->mutex); spin_unlock(&delayed_refs->lock); btrfs_put_delayed_ref(ref); @@ -3671,6 +3673,8 @@ static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root) delalloc_inodes); list_del_init(&btrfs_inode->delalloc_inodes); + clear_bit(BTRFS_INODE_IN_DELALLOC_LIST, + &btrfs_inode->runtime_flags); btrfs_invalidate_inodes(btrfs_inode->root); } @@ -3823,10 +3827,8 @@ int btrfs_cleanup_transaction(struct btrfs_root *root) while (!list_empty(&list)) { t = list_entry(list.next, struct btrfs_transaction, list); - if (!t) - break; - btrfs_destroy_ordered_operations(root); + btrfs_destroy_ordered_operations(t, root); btrfs_destroy_ordered_extents(root); diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 5a3327b8f90..5cd44e23959 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -72,8 +72,7 @@ enum { RESERVE_ALLOC_NO_ACCOUNT = 2, }; -static int update_block_group(struct btrfs_trans_handle *trans, - struct btrfs_root *root, +static int update_block_group(struct btrfs_root *root, u64 bytenr, u64 num_bytes, int alloc); static int __btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root *root, @@ -103,6 +102,8 @@ static void dump_space_info(struct btrfs_space_info *info, u64 bytes, int dump_block_groups); static int btrfs_update_reserved_bytes(struct btrfs_block_group_cache *cache, u64 num_bytes, int reserve); +static int block_rsv_use_bytes(struct btrfs_block_rsv *block_rsv, + u64 num_bytes); static noinline int block_group_cache_done(struct btrfs_block_group_cache *cache) @@ -162,6 +163,10 @@ static int btrfs_add_block_group_cache(struct btrfs_fs_info *info, rb_link_node(&block_group->cache_node, parent, p); rb_insert_color(&block_group->cache_node, &info->block_group_cache_tree); + + if (info->first_logical_byte > block_group->key.objectid) + info->first_logical_byte = block_group->key.objectid; + spin_unlock(&info->block_group_cache_lock); return 0; @@ -203,8 +208,11 @@ block_group_cache_tree_search(struct btrfs_fs_info *info, u64 bytenr, break; } } - if (ret) + if (ret) { btrfs_get_block_group(ret); + if (bytenr == 0 && info->first_logical_byte > ret->key.objectid) + info->first_logical_byte = ret->key.objectid; + } spin_unlock(&info->block_group_cache_lock); return ret; @@ -468,8 +476,6 @@ out: } static int cache_block_group(struct btrfs_block_group_cache *cache, - struct btrfs_trans_handle *trans, - struct btrfs_root *root, int load_cache_only) { DEFINE_WAIT(wait); @@ -527,12 +533,6 @@ static int cache_block_group(struct btrfs_block_group_cache *cache, cache->cached = BTRFS_CACHE_FAST; spin_unlock(&cache->lock); - /* - * We can't do the read from on-disk cache during a commit since we need - * to have the normal tree locking. Also if we are currently trying to - * allocate blocks for the tree root we can't do the fast caching since - * we likely hold important locks. - */ if (fs_info->mount_opt & BTRFS_MOUNT_SPACE_CACHE) { ret = load_free_space_cache(fs_info, cache); @@ -2143,7 +2143,6 @@ static int run_one_delayed_ref(struct btrfs_trans_handle *trans, node->num_bytes); } } - mutex_unlock(&head->mutex); return ret; } @@ -2258,7 +2257,7 @@ static noinline int run_clustered_refs(struct btrfs_trans_handle *trans, * process of being added. Don't run this ref yet. */ list_del_init(&locked_ref->cluster); - mutex_unlock(&locked_ref->mutex); + btrfs_delayed_ref_unlock(locked_ref); locked_ref = NULL; delayed_refs->num_heads_ready++; spin_unlock(&delayed_refs->lock); @@ -2285,7 +2284,7 @@ static noinline int run_clustered_refs(struct btrfs_trans_handle *trans, ref = &locked_ref->node; if (extent_op && must_insert_reserved) { - kfree(extent_op); + btrfs_free_delayed_extent_op(extent_op); extent_op = NULL; } @@ -2294,28 +2293,25 @@ static noinline int run_clustered_refs(struct btrfs_trans_handle *trans, ret = run_delayed_extent_op(trans, root, ref, extent_op); - kfree(extent_op); + btrfs_free_delayed_extent_op(extent_op); if (ret) { - list_del_init(&locked_ref->cluster); - mutex_unlock(&locked_ref->mutex); - - printk(KERN_DEBUG "btrfs: run_delayed_extent_op returned %d\n", ret); + printk(KERN_DEBUG + "btrfs: run_delayed_extent_op " + "returned %d\n", ret); spin_lock(&delayed_refs->lock); + btrfs_delayed_ref_unlock(locked_ref); return ret; } goto next; } - - list_del_init(&locked_ref->cluster); - locked_ref = NULL; } ref->in_tree = 0; rb_erase(&ref->rb_node, &delayed_refs->root); delayed_refs->num_entries--; - if (locked_ref) { + if (!btrfs_delayed_ref_is_head(ref)) { /* * when we play the delayed ref, also correct the * ref_mod on head @@ -2337,20 +2333,29 @@ static noinline int run_clustered_refs(struct btrfs_trans_handle *trans, ret = run_one_delayed_ref(trans, root, ref, extent_op, must_insert_reserved); - btrfs_put_delayed_ref(ref); - kfree(extent_op); - count++; - + btrfs_free_delayed_extent_op(extent_op); if (ret) { - if (locked_ref) { - list_del_init(&locked_ref->cluster); - mutex_unlock(&locked_ref->mutex); - } - printk(KERN_DEBUG "btrfs: run_one_delayed_ref returned %d\n", ret); + btrfs_delayed_ref_unlock(locked_ref); + btrfs_put_delayed_ref(ref); + printk(KERN_DEBUG + "btrfs: run_one_delayed_ref returned %d\n", ret); spin_lock(&delayed_refs->lock); return ret; } + /* + * If this node is a head, that means all the refs in this head + * have been dealt with, and we will pick the next head to deal + * with, so we must unlock the head and drop it from the cluster + * list before we release it. + */ + if (btrfs_delayed_ref_is_head(ref)) { + list_del_init(&locked_ref->cluster); + btrfs_delayed_ref_unlock(locked_ref); + locked_ref = NULL; + } + btrfs_put_delayed_ref(ref); + count++; next: cond_resched(); spin_lock(&delayed_refs->lock); @@ -2500,6 +2505,7 @@ again: ret = run_clustered_refs(trans, root, &cluster); if (ret < 0) { + btrfs_release_ref_cluster(&cluster); spin_unlock(&delayed_refs->lock); btrfs_abort_transaction(trans, root, ret); return ret; @@ -2586,7 +2592,7 @@ int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans, struct btrfs_delayed_extent_op *extent_op; int ret; - extent_op = kmalloc(sizeof(*extent_op), GFP_NOFS); + extent_op = btrfs_alloc_delayed_extent_op(); if (!extent_op) return -ENOMEM; @@ -2598,7 +2604,7 @@ int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans, ret = btrfs_add_delayed_extent_op(root->fs_info, trans, bytenr, num_bytes, extent_op); if (ret) - kfree(extent_op); + btrfs_free_delayed_extent_op(extent_op); return ret; } @@ -3223,12 +3229,14 @@ static void set_avail_alloc_bits(struct btrfs_fs_info *fs_info, u64 flags) u64 extra_flags = chunk_to_extended(flags) & BTRFS_EXTENDED_PROFILE_MASK; + write_seqlock(&fs_info->profiles_lock); if (flags & BTRFS_BLOCK_GROUP_DATA) fs_info->avail_data_alloc_bits |= extra_flags; if (flags & BTRFS_BLOCK_GROUP_METADATA) fs_info->avail_metadata_alloc_bits |= extra_flags; if (flags & BTRFS_BLOCK_GROUP_SYSTEM) fs_info->avail_system_alloc_bits |= extra_flags; + write_sequnlock(&fs_info->profiles_lock); } /* @@ -3320,12 +3328,18 @@ u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags) static u64 get_alloc_profile(struct btrfs_root *root, u64 flags) { - if (flags & BTRFS_BLOCK_GROUP_DATA) - flags |= root->fs_info->avail_data_alloc_bits; - else if (flags & BTRFS_BLOCK_GROUP_SYSTEM) - flags |= root->fs_info->avail_system_alloc_bits; - else if (flags & BTRFS_BLOCK_GROUP_METADATA) - flags |= root->fs_info->avail_metadata_alloc_bits; + unsigned seq; + + do { + seq = read_seqbegin(&root->fs_info->profiles_lock); + + if (flags & BTRFS_BLOCK_GROUP_DATA) + flags |= root->fs_info->avail_data_alloc_bits; + else if (flags & BTRFS_BLOCK_GROUP_SYSTEM) + flags |= root->fs_info->avail_system_alloc_bits; + else if (flags & BTRFS_BLOCK_GROUP_METADATA) + flags |= root->fs_info->avail_metadata_alloc_bits; + } while (read_seqretry(&root->fs_info->profiles_lock, seq)); return btrfs_reduce_alloc_profile(root, flags); } @@ -3564,6 +3578,10 @@ static int do_chunk_alloc(struct btrfs_trans_handle *trans, int wait_for_alloc = 0; int ret = 0; + /* Don't re-enter if we're already allocating a chunk */ + if (trans->allocating_chunk) + return -ENOSPC; + space_info = __find_space_info(extent_root->fs_info, flags); if (!space_info) { ret = update_space_info(extent_root->fs_info, flags, @@ -3606,6 +3624,8 @@ again: goto again; } + trans->allocating_chunk = true; + /* * If we have mixed data/metadata chunks we want to make sure we keep * allocating mixed chunks instead of individual chunks. @@ -3632,6 +3652,7 @@ again: check_system_chunk(trans, extent_root, flags); ret = btrfs_alloc_chunk(trans, extent_root, flags); + trans->allocating_chunk = false; if (ret < 0 && ret != -ENOSPC) goto out; @@ -3653,13 +3674,31 @@ static int can_overcommit(struct btrfs_root *root, struct btrfs_space_info *space_info, u64 bytes, enum btrfs_reserve_flush_enum flush) { + struct btrfs_block_rsv *global_rsv = &root->fs_info->global_block_rsv; u64 profile = btrfs_get_alloc_profile(root, 0); + u64 rsv_size = 0; u64 avail; u64 used; + u64 to_add; used = space_info->bytes_used + space_info->bytes_reserved + - space_info->bytes_pinned + space_info->bytes_readonly + - space_info->bytes_may_use; + space_info->bytes_pinned + space_info->bytes_readonly; + + spin_lock(&global_rsv->lock); + rsv_size = global_rsv->size; + spin_unlock(&global_rsv->lock); + + /* + * We only want to allow over committing if we have lots of actual space + * free, but if we don't have enough space to handle the global reserve + * space then we could end up having a real enospc problem when trying + * to allocate a chunk or some other such important allocation. + */ + rsv_size <<= 1; + if (used + rsv_size >= space_info->total_bytes) + return 0; + + used += space_info->bytes_may_use; spin_lock(&root->fs_info->free_chunk_lock); avail = root->fs_info->free_chunk_space; @@ -3674,27 +3713,38 @@ static int can_overcommit(struct btrfs_root *root, BTRFS_BLOCK_GROUP_RAID10)) avail >>= 1; + to_add = space_info->total_bytes; + /* * If we aren't flushing all things, let us overcommit up to * 1/2th of the space. If we can flush, don't let us overcommit * too much, let it overcommit up to 1/8 of the space. */ if (flush == BTRFS_RESERVE_FLUSH_ALL) - avail >>= 3; + to_add >>= 3; else - avail >>= 1; + to_add >>= 1; - if (used + bytes < space_info->total_bytes + avail) + /* + * Limit the overcommit to the amount of free space we could possibly + * allocate for chunks. + */ + to_add = min(avail, to_add); + + if (used + bytes < space_info->total_bytes + to_add) return 1; return 0; } -static int writeback_inodes_sb_nr_if_idle_safe(struct super_block *sb, - unsigned long nr_pages, - enum wb_reason reason) +static inline int writeback_inodes_sb_nr_if_idle_safe(struct super_block *sb, + unsigned long nr_pages, + enum wb_reason reason) { - if (!writeback_in_progress(sb->s_bdi) && - down_read_trylock(&sb->s_umount)) { + /* the flusher is dealing with the dirty inodes now. */ + if (writeback_in_progress(sb->s_bdi)) + return 1; + + if (down_read_trylock(&sb->s_umount)) { writeback_inodes_sb_nr(sb, nr_pages, reason); up_read(&sb->s_umount); return 1; @@ -3703,6 +3753,28 @@ static int writeback_inodes_sb_nr_if_idle_safe(struct super_block *sb, return 0; } +void btrfs_writeback_inodes_sb_nr(struct btrfs_root *root, + unsigned long nr_pages) +{ + struct super_block *sb = root->fs_info->sb; + int started; + + /* If we can not start writeback, just sync all the delalloc file. */ + started = writeback_inodes_sb_nr_if_idle_safe(sb, nr_pages, + WB_REASON_FS_FREE_SPACE); + if (!started) { + /* + * We needn't worry the filesystem going from r/w to r/o though + * we don't acquire ->s_umount mutex, because the filesystem + * should guarantee the delalloc inodes list be empty after + * the filesystem is readonly(all dirty pages are written to + * the disk). + */ + btrfs_start_delalloc_inodes(root, 0); + btrfs_wait_ordered_extents(root, 0); + } +} + /* * shrink metadata reservation for delalloc */ @@ -3724,7 +3796,8 @@ static void shrink_delalloc(struct btrfs_root *root, u64 to_reclaim, u64 orig, space_info = block_rsv->space_info; smp_mb(); - delalloc_bytes = root->fs_info->delalloc_bytes; + delalloc_bytes = percpu_counter_sum_positive( + &root->fs_info->delalloc_bytes); if (delalloc_bytes == 0) { if (trans) return; @@ -3735,10 +3808,7 @@ static void shrink_delalloc(struct btrfs_root *root, u64 to_reclaim, u64 orig, while (delalloc_bytes && loops < 3) { max_reclaim = min(delalloc_bytes, to_reclaim); nr_pages = max_reclaim >> PAGE_CACHE_SHIFT; - writeback_inodes_sb_nr_if_idle_safe(root->fs_info->sb, - nr_pages, - WB_REASON_FS_FREE_SPACE); - + btrfs_writeback_inodes_sb_nr(root, nr_pages); /* * We need to wait for the async pages to actually start before * we do anything. @@ -3766,7 +3836,8 @@ static void shrink_delalloc(struct btrfs_root *root, u64 to_reclaim, u64 orig, break; } smp_mb(); - delalloc_bytes = root->fs_info->delalloc_bytes; + delalloc_bytes = percpu_counter_sum_positive( + &root->fs_info->delalloc_bytes); } } @@ -4030,6 +4101,15 @@ again: goto again; out: + if (ret == -ENOSPC && + unlikely(root->orphan_cleanup_state == ORPHAN_CLEANUP_STARTED)) { + struct btrfs_block_rsv *global_rsv = + &root->fs_info->global_block_rsv; + + if (block_rsv != global_rsv && + !block_rsv_use_bytes(global_rsv, orig_bytes)) + ret = 0; + } if (flushing) { spin_lock(&space_info->lock); space_info->flush = 0; @@ -4668,7 +4748,8 @@ void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes) spin_lock(&BTRFS_I(inode)->lock); dropped = drop_outstanding_extent(inode); - to_free = calc_csum_metadata_size(inode, num_bytes, 0); + if (num_bytes) + to_free = calc_csum_metadata_size(inode, num_bytes, 0); spin_unlock(&BTRFS_I(inode)->lock); if (dropped > 0) to_free += btrfs_calc_trans_metadata_size(root, dropped); @@ -4735,8 +4816,7 @@ void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes) btrfs_free_reserved_data_space(inode, num_bytes); } -static int update_block_group(struct btrfs_trans_handle *trans, - struct btrfs_root *root, +static int update_block_group(struct btrfs_root *root, u64 bytenr, u64 num_bytes, int alloc) { struct btrfs_block_group_cache *cache = NULL; @@ -4773,7 +4853,7 @@ static int update_block_group(struct btrfs_trans_handle *trans, * space back to the block group, otherwise we will leak space. */ if (!alloc && cache->cached == BTRFS_CACHE_NO) - cache_block_group(cache, trans, NULL, 1); + cache_block_group(cache, 1); byte_in_group = bytenr - cache->key.objectid; WARN_ON(byte_in_group > cache->key.offset); @@ -4823,6 +4903,13 @@ static u64 first_logical_byte(struct btrfs_root *root, u64 search_start) struct btrfs_block_group_cache *cache; u64 bytenr; + spin_lock(&root->fs_info->block_group_cache_lock); + bytenr = root->fs_info->first_logical_byte; + spin_unlock(&root->fs_info->block_group_cache_lock); + + if (bytenr < (u64)-1) + return bytenr; + cache = btrfs_lookup_first_block_group(root->fs_info, search_start); if (!cache) return 0; @@ -4873,8 +4960,7 @@ int btrfs_pin_extent(struct btrfs_root *root, /* * this function must be called within transaction */ -int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans, - struct btrfs_root *root, +int btrfs_pin_extent_for_log_replay(struct btrfs_root *root, u64 bytenr, u64 num_bytes) { struct btrfs_block_group_cache *cache; @@ -4888,7 +4974,7 @@ int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans, * to one because the slow code to read in the free extents does check * the pinned extents. */ - cache_block_group(cache, trans, root, 1); + cache_block_group(cache, 1); pin_down_extent(root, cache, bytenr, num_bytes, 0); @@ -5285,7 +5371,7 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans, } } - ret = update_block_group(trans, root, bytenr, num_bytes, 0); + ret = update_block_group(root, bytenr, num_bytes, 0); if (ret) { btrfs_abort_transaction(trans, extent_root, ret); goto out; @@ -5330,7 +5416,7 @@ static noinline int check_ref_cleanup(struct btrfs_trans_handle *trans, if (head->extent_op) { if (!head->must_insert_reserved) goto out; - kfree(head->extent_op); + btrfs_free_delayed_extent_op(head->extent_op); head->extent_op = NULL; } @@ -5476,7 +5562,6 @@ wait_block_group_cache_progress(struct btrfs_block_group_cache *cache, u64 num_bytes) { struct btrfs_caching_control *caching_ctl; - DEFINE_WAIT(wait); caching_ctl = get_caching_control(cache); if (!caching_ctl) @@ -5493,7 +5578,6 @@ static noinline int wait_block_group_cache_done(struct btrfs_block_group_cache *cache) { struct btrfs_caching_control *caching_ctl; - DEFINE_WAIT(wait); caching_ctl = get_caching_control(cache); if (!caching_ctl) @@ -5507,20 +5591,16 @@ wait_block_group_cache_done(struct btrfs_block_group_cache *cache) int __get_raid_index(u64 flags) { - int index; - if (flags & BTRFS_BLOCK_GROUP_RAID10) - index = 0; + return BTRFS_RAID_RAID10; else if (flags & BTRFS_BLOCK_GROUP_RAID1) - index = 1; + return BTRFS_RAID_RAID1; else if (flags & BTRFS_BLOCK_GROUP_DUP) - index = 2; + return BTRFS_RAID_DUP; else if (flags & BTRFS_BLOCK_GROUP_RAID0) - index = 3; + return BTRFS_RAID_RAID0; else - index = 4; - - return index; + return BTRFS_RAID_SINGLE; } static int get_block_group_index(struct btrfs_block_group_cache *cache) @@ -5678,8 +5758,7 @@ have_block_group: cached = block_group_cache_done(block_group); if (unlikely(!cached)) { found_uncached_bg = true; - ret = cache_block_group(block_group, trans, - orig_root, 0); + ret = cache_block_group(block_group, 0); BUG_ON(ret < 0); ret = 0; } @@ -6108,7 +6187,7 @@ static int alloc_reserved_file_extent(struct btrfs_trans_handle *trans, btrfs_mark_buffer_dirty(path->nodes[0]); btrfs_free_path(path); - ret = update_block_group(trans, root, ins->objectid, ins->offset, 1); + ret = update_block_group(root, ins->objectid, ins->offset, 1); if (ret) { /* -ENOENT, logic error */ printk(KERN_ERR "btrfs update block group failed for %llu " "%llu\n", (unsigned long long)ins->objectid, @@ -6172,7 +6251,7 @@ static int alloc_reserved_tree_block(struct btrfs_trans_handle *trans, btrfs_mark_buffer_dirty(leaf); btrfs_free_path(path); - ret = update_block_group(trans, root, ins->objectid, ins->offset, 1); + ret = update_block_group(root, ins->objectid, ins->offset, 1); if (ret) { /* -ENOENT, logic error */ printk(KERN_ERR "btrfs update block group failed for %llu " "%llu\n", (unsigned long long)ins->objectid, @@ -6215,7 +6294,7 @@ int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, u64 num_bytes = ins->offset; block_group = btrfs_lookup_block_group(root->fs_info, ins->objectid); - cache_block_group(block_group, trans, NULL, 0); + cache_block_group(block_group, 0); caching_ctl = get_caching_control(block_group); if (!caching_ctl) { @@ -6329,12 +6408,14 @@ use_block_rsv(struct btrfs_trans_handle *trans, if (!ret) return block_rsv; if (ret && !block_rsv->failfast) { - static DEFINE_RATELIMIT_STATE(_rs, - DEFAULT_RATELIMIT_INTERVAL, - /*DEFAULT_RATELIMIT_BURST*/ 2); - if (__ratelimit(&_rs)) - WARN(1, KERN_DEBUG "btrfs: block rsv returned %d\n", - ret); + if (btrfs_test_opt(root, ENOSPC_DEBUG)) { + static DEFINE_RATELIMIT_STATE(_rs, + DEFAULT_RATELIMIT_INTERVAL * 10, + /*DEFAULT_RATELIMIT_BURST*/ 1); + if (__ratelimit(&_rs)) + WARN(1, KERN_DEBUG + "btrfs: block rsv returned %d\n", ret); + } ret = reserve_metadata_bytes(root, block_rsv, blocksize, BTRFS_RESERVE_NO_FLUSH); if (!ret) { @@ -6400,7 +6481,7 @@ struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans, if (root_objectid != BTRFS_TREE_LOG_OBJECTID) { struct btrfs_delayed_extent_op *extent_op; - extent_op = kmalloc(sizeof(*extent_op), GFP_NOFS); + extent_op = btrfs_alloc_delayed_extent_op(); BUG_ON(!extent_op); /* -ENOMEM */ if (key) memcpy(&extent_op->key, key, sizeof(extent_op->key)); @@ -7481,16 +7562,16 @@ int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr) index = get_block_group_index(block_group); } - if (index == 0) { + if (index == BTRFS_RAID_RAID10) { dev_min = 4; /* Divide by 2 */ min_free >>= 1; - } else if (index == 1) { + } else if (index == BTRFS_RAID_RAID1) { dev_min = 2; - } else if (index == 2) { + } else if (index == BTRFS_RAID_DUP) { /* Multiply by 2 */ min_free <<= 1; - } else if (index == 3) { + } else if (index == BTRFS_RAID_RAID0) { dev_min = fs_devices->rw_devices; do_div(min_free, dev_min); } @@ -7651,11 +7732,13 @@ int btrfs_free_block_groups(struct btrfs_fs_info *info) space_info = list_entry(info->space_info.next, struct btrfs_space_info, list); - if (space_info->bytes_pinned > 0 || - space_info->bytes_reserved > 0 || - space_info->bytes_may_use > 0) { - WARN_ON(1); - dump_space_info(space_info, 0, 0); + if (btrfs_test_opt(info->tree_root, ENOSPC_DEBUG)) { + if (space_info->bytes_pinned > 0 || + space_info->bytes_reserved > 0 || + space_info->bytes_may_use > 0) { + WARN_ON(1); + dump_space_info(space_info, 0, 0); + } } list_del(&space_info->list); kfree(space_info); @@ -7932,12 +8015,14 @@ static void clear_avail_alloc_bits(struct btrfs_fs_info *fs_info, u64 flags) u64 extra_flags = chunk_to_extended(flags) & BTRFS_EXTENDED_PROFILE_MASK; + write_seqlock(&fs_info->profiles_lock); if (flags & BTRFS_BLOCK_GROUP_DATA) fs_info->avail_data_alloc_bits &= ~extra_flags; if (flags & BTRFS_BLOCK_GROUP_METADATA) fs_info->avail_metadata_alloc_bits &= ~extra_flags; if (flags & BTRFS_BLOCK_GROUP_SYSTEM) fs_info->avail_system_alloc_bits &= ~extra_flags; + write_sequnlock(&fs_info->profiles_lock); } int btrfs_remove_block_group(struct btrfs_trans_handle *trans, @@ -8036,6 +8121,9 @@ int btrfs_remove_block_group(struct btrfs_trans_handle *trans, spin_lock(&root->fs_info->block_group_cache_lock); rb_erase(&block_group->cache_node, &root->fs_info->block_group_cache_tree); + + if (root->fs_info->first_logical_byte == block_group->key.objectid) + root->fs_info->first_logical_byte = (u64)-1; spin_unlock(&root->fs_info->block_group_cache_lock); down_write(&block_group->space_info->groups_sem); @@ -8158,7 +8246,7 @@ int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range) if (end - start >= range->minlen) { if (!block_group_cache_done(cache)) { - ret = cache_block_group(cache, NULL, root, 0); + ret = cache_block_group(cache, 0); if (!ret) wait_block_group_cache_done(cache); } diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index 1b319df29ee..5c00d6aeae7 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -1834,7 +1834,7 @@ int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end, */ static void check_page_uptodate(struct extent_io_tree *tree, struct page *page) { - u64 start = (u64)page->index << PAGE_CACHE_SHIFT; + u64 start = page_offset(page); u64 end = start + PAGE_CACHE_SIZE - 1; if (test_range_bit(tree, start, end, EXTENT_UPTODATE, 1, NULL)) SetPageUptodate(page); @@ -1846,7 +1846,7 @@ static void check_page_uptodate(struct extent_io_tree *tree, struct page *page) */ static void check_page_locked(struct extent_io_tree *tree, struct page *page) { - u64 start = (u64)page->index << PAGE_CACHE_SHIFT; + u64 start = page_offset(page); u64 end = start + PAGE_CACHE_SIZE - 1; if (!test_range_bit(tree, start, end, EXTENT_LOCKED, 0, NULL)) unlock_page(page); @@ -1960,7 +1960,7 @@ int repair_io_failure(struct btrfs_fs_info *fs_info, u64 start, return -EIO; } bio->bi_bdev = dev->bdev; - bio_add_page(bio, page, length, start-page_offset(page)); + bio_add_page(bio, page, length, start - page_offset(page)); btrfsic_submit_bio(WRITE_SYNC, bio); wait_for_completion(&compl); @@ -2293,8 +2293,7 @@ static void end_bio_extent_writepage(struct bio *bio, int err) struct page *page = bvec->bv_page; tree = &BTRFS_I(page->mapping->host)->io_tree; - start = ((u64)page->index << PAGE_CACHE_SHIFT) + - bvec->bv_offset; + start = page_offset(page) + bvec->bv_offset; end = start + bvec->bv_len - 1; if (bvec->bv_offset == 0 && bvec->bv_len == PAGE_CACHE_SIZE) @@ -2353,8 +2352,7 @@ static void end_bio_extent_readpage(struct bio *bio, int err) (long int)bio->bi_bdev); tree = &BTRFS_I(page->mapping->host)->io_tree; - start = ((u64)page->index << PAGE_CACHE_SHIFT) + - bvec->bv_offset; + start = page_offset(page) + bvec->bv_offset; end = start + bvec->bv_len - 1; if (bvec->bv_offset == 0 && bvec->bv_len == PAGE_CACHE_SIZE) @@ -2471,7 +2469,7 @@ static int __must_check submit_one_bio(int rw, struct bio *bio, struct extent_io_tree *tree = bio->bi_private; u64 start; - start = ((u64)page->index << PAGE_CACHE_SHIFT) + bvec->bv_offset; + start = page_offset(page) + bvec->bv_offset; bio->bi_private = NULL; @@ -2595,7 +2593,7 @@ static int __extent_read_full_page(struct extent_io_tree *tree, unsigned long *bio_flags) { struct inode *inode = page->mapping->host; - u64 start = (u64)page->index << PAGE_CACHE_SHIFT; + u64 start = page_offset(page); u64 page_end = start + PAGE_CACHE_SIZE - 1; u64 end; u64 cur = start; @@ -2648,6 +2646,8 @@ static int __extent_read_full_page(struct extent_io_tree *tree, } } while (cur <= end) { + unsigned long pnr = (last_byte >> PAGE_CACHE_SHIFT) + 1; + if (cur >= last_byte) { char *userpage; struct extent_state *cached = NULL; @@ -2735,26 +2735,17 @@ static int __extent_read_full_page(struct extent_io_tree *tree, continue; } - ret = 0; - if (tree->ops && tree->ops->readpage_io_hook) { - ret = tree->ops->readpage_io_hook(page, cur, - cur + iosize - 1); - } - if (!ret) { - unsigned long pnr = (last_byte >> PAGE_CACHE_SHIFT) + 1; - pnr -= page->index; - ret = submit_extent_page(READ, tree, page, + pnr -= page->index; + ret = submit_extent_page(READ, tree, page, sector, disk_io_size, pg_offset, bdev, bio, pnr, end_bio_extent_readpage, mirror_num, *bio_flags, this_bio_flag); - if (!ret) { - nr++; - *bio_flags = this_bio_flag; - } - } - if (ret) { + if (!ret) { + nr++; + *bio_flags = this_bio_flag; + } else { SetPageError(page); unlock_extent(tree, cur, cur + iosize - 1); } @@ -2806,7 +2797,7 @@ static int __extent_writepage(struct page *page, struct writeback_control *wbc, struct inode *inode = page->mapping->host; struct extent_page_data *epd = data; struct extent_io_tree *tree = epd->tree; - u64 start = (u64)page->index << PAGE_CACHE_SHIFT; + u64 start = page_offset(page); u64 delalloc_start; u64 page_end = start + PAGE_CACHE_SIZE - 1; u64 end; @@ -3124,12 +3115,9 @@ static int lock_extent_buffer_for_io(struct extent_buffer *eb, set_bit(EXTENT_BUFFER_WRITEBACK, &eb->bflags); spin_unlock(&eb->refs_lock); btrfs_set_header_flag(eb, BTRFS_HEADER_FLAG_WRITTEN); - spin_lock(&fs_info->delalloc_lock); - if (fs_info->dirty_metadata_bytes >= eb->len) - fs_info->dirty_metadata_bytes -= eb->len; - else - WARN_ON(1); - spin_unlock(&fs_info->delalloc_lock); + __percpu_counter_add(&fs_info->dirty_metadata_bytes, + -eb->len, + fs_info->dirty_metadata_batch); ret = 1; } else { spin_unlock(&eb->refs_lock); @@ -3446,15 +3434,9 @@ retry: * swizzled back from swapper_space to tmpfs file * mapping */ - if (tree->ops && - tree->ops->write_cache_pages_lock_hook) { - tree->ops->write_cache_pages_lock_hook(page, - data, flush_fn); - } else { - if (!trylock_page(page)) { - flush_fn(data); - lock_page(page); - } + if (!trylock_page(page)) { + flush_fn(data); + lock_page(page); } if (unlikely(page->mapping != mapping)) { @@ -3674,7 +3656,7 @@ int extent_invalidatepage(struct extent_io_tree *tree, struct page *page, unsigned long offset) { struct extent_state *cached_state = NULL; - u64 start = ((u64)page->index << PAGE_CACHE_SHIFT); + u64 start = page_offset(page); u64 end = start + PAGE_CACHE_SIZE - 1; size_t blocksize = page->mapping->host->i_sb->s_blocksize; @@ -3700,7 +3682,7 @@ int try_release_extent_state(struct extent_map_tree *map, struct extent_io_tree *tree, struct page *page, gfp_t mask) { - u64 start = (u64)page->index << PAGE_CACHE_SHIFT; + u64 start = page_offset(page); u64 end = start + PAGE_CACHE_SIZE - 1; int ret = 1; @@ -3739,7 +3721,7 @@ int try_release_extent_mapping(struct extent_map_tree *map, gfp_t mask) { struct extent_map *em; - u64 start = (u64)page->index << PAGE_CACHE_SHIFT; + u64 start = page_offset(page); u64 end = start + PAGE_CACHE_SIZE - 1; if ((mask & __GFP_WAIT) && diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h index 2eacfabd326..ff182322d11 100644 --- a/fs/btrfs/extent_io.h +++ b/fs/btrfs/extent_io.h @@ -75,7 +75,6 @@ struct extent_io_ops { int (*merge_bio_hook)(struct page *page, unsigned long offset, size_t size, struct bio *bio, unsigned long bio_flags); - int (*readpage_io_hook)(struct page *page, u64 start, u64 end); int (*readpage_io_failed_hook)(struct page *page, int failed_mirror); int (*readpage_end_io_hook)(struct page *page, u64 start, u64 end, struct extent_state *state, int mirror); @@ -90,8 +89,6 @@ struct extent_io_ops { struct extent_state *other); void (*split_extent_hook)(struct inode *inode, struct extent_state *orig, u64 split); - int (*write_cache_pages_lock_hook)(struct page *page, void *data, - void (*flush_fn)(void *)); }; struct extent_io_tree { diff --git a/fs/btrfs/file-item.c b/fs/btrfs/file-item.c index 94aa53b3872..ec160202be3 100644 --- a/fs/btrfs/file-item.c +++ b/fs/btrfs/file-item.c @@ -684,6 +684,24 @@ out: return ret; } +static u64 btrfs_sector_sum_left(struct btrfs_ordered_sum *sums, + struct btrfs_sector_sum *sector_sum, + u64 total_bytes, u64 sectorsize) +{ + u64 tmp = sectorsize; + u64 next_sector = sector_sum->bytenr; + struct btrfs_sector_sum *next = sector_sum + 1; + + while ((tmp + total_bytes) < sums->len) { + if (next_sector + sectorsize != next->bytenr) + break; + tmp += sectorsize; + next_sector = next->bytenr; + next++; + } + return tmp; +} + int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_ordered_sum *sums) @@ -789,20 +807,32 @@ again: goto insert; } - if (csum_offset >= btrfs_item_size_nr(leaf, path->slots[0]) / + if (csum_offset == btrfs_item_size_nr(leaf, path->slots[0]) / csum_size) { - u32 diff = (csum_offset + 1) * csum_size; + int extend_nr; + u64 tmp; + u32 diff; + u32 free_space; - /* - * is the item big enough already? we dropped our lock - * before and need to recheck - */ - if (diff < btrfs_item_size_nr(leaf, path->slots[0])) - goto csum; + if (btrfs_leaf_free_space(root, leaf) < + sizeof(struct btrfs_item) + csum_size * 2) + goto insert; + + free_space = btrfs_leaf_free_space(root, leaf) - + sizeof(struct btrfs_item) - csum_size; + tmp = btrfs_sector_sum_left(sums, sector_sum, total_bytes, + root->sectorsize); + tmp >>= root->fs_info->sb->s_blocksize_bits; + WARN_ON(tmp < 1); + + extend_nr = max_t(int, 1, (int)tmp); + diff = (csum_offset + extend_nr) * csum_size; + diff = min(diff, MAX_CSUM_ITEMS(root, csum_size) * csum_size); diff = diff - btrfs_item_size_nr(leaf, path->slots[0]); - if (diff != csum_size) - goto insert; + diff = min(free_space, diff); + diff /= csum_size; + diff *= csum_size; btrfs_extend_item(trans, root, path, diff); goto csum; @@ -812,19 +842,14 @@ insert: btrfs_release_path(path); csum_offset = 0; if (found_next) { - u64 tmp = total_bytes + root->sectorsize; - u64 next_sector = sector_sum->bytenr; - struct btrfs_sector_sum *next = sector_sum + 1; + u64 tmp; - while (tmp < sums->len) { - if (next_sector + root->sectorsize != next->bytenr) - break; - tmp += root->sectorsize; - next_sector = next->bytenr; - next++; - } - tmp = min(tmp, next_offset - file_key.offset); + tmp = btrfs_sector_sum_left(sums, sector_sum, total_bytes, + root->sectorsize); tmp >>= root->fs_info->sb->s_blocksize_bits; + tmp = min(tmp, (next_offset - file_key.offset) >> + root->fs_info->sb->s_blocksize_bits); + tmp = max((u64)1, tmp); tmp = min(tmp, (u64)MAX_CSUM_ITEMS(root, csum_size)); ins_size = csum_size * tmp; diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c index aeb84469d2c..9f67e623206 100644 --- a/fs/btrfs/file.c +++ b/fs/btrfs/file.c @@ -30,11 +30,11 @@ #include #include #include +#include #include "ctree.h" #include "disk-io.h" #include "transaction.h" #include "btrfs_inode.h" -#include "ioctl.h" #include "print-tree.h" #include "tree-log.h" #include "locking.h" @@ -1544,7 +1544,7 @@ static ssize_t btrfs_file_aio_write(struct kiocb *iocb, * although we have opened a file as writable, we have * to stop this write operation to ensure FS consistency. */ - if (root->fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR) { + if (test_bit(BTRFS_FS_STATE_ERROR, &root->fs_info->fs_state)) { mutex_unlock(&inode->i_mutex); err = -EROFS; goto out; @@ -1627,7 +1627,20 @@ int btrfs_release_file(struct inode *inode, struct file *filp) */ if (test_and_clear_bit(BTRFS_INODE_ORDERED_DATA_CLOSE, &BTRFS_I(inode)->runtime_flags)) { - btrfs_add_ordered_operation(NULL, BTRFS_I(inode)->root, inode); + struct btrfs_trans_handle *trans; + struct btrfs_root *root = BTRFS_I(inode)->root; + + /* + * We need to block on a committing transaction to keep us from + * throwing a ordered operation on to the list and causing + * something like sync to deadlock trying to flush out this + * inode. + */ + trans = btrfs_start_transaction(root, 0); + if (IS_ERR(trans)) + return PTR_ERR(trans); + btrfs_add_ordered_operation(trans, BTRFS_I(inode)->root, inode); + btrfs_end_transaction(trans, root); if (inode->i_size > BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT) filemap_flush(inode->i_mapping); } @@ -1654,16 +1667,21 @@ int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync) struct btrfs_root *root = BTRFS_I(inode)->root; int ret = 0; struct btrfs_trans_handle *trans; + bool full_sync = 0; trace_btrfs_sync_file(file, datasync); /* * We write the dirty pages in the range and wait until they complete * out of the ->i_mutex. If so, we can flush the dirty pages by - * multi-task, and make the performance up. + * multi-task, and make the performance up. See + * btrfs_wait_ordered_range for an explanation of the ASYNC check. */ atomic_inc(&BTRFS_I(inode)->sync_writers); - ret = filemap_write_and_wait_range(inode->i_mapping, start, end); + ret = filemap_fdatawrite_range(inode->i_mapping, start, end); + if (!ret && test_bit(BTRFS_INODE_HAS_ASYNC_EXTENT, + &BTRFS_I(inode)->runtime_flags)) + ret = filemap_fdatawrite_range(inode->i_mapping, start, end); atomic_dec(&BTRFS_I(inode)->sync_writers); if (ret) return ret; @@ -1675,7 +1693,10 @@ int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync) * range being left. */ atomic_inc(&root->log_batch); - btrfs_wait_ordered_range(inode, start, end - start + 1); + full_sync = test_bit(BTRFS_INODE_NEEDS_FULL_SYNC, + &BTRFS_I(inode)->runtime_flags); + if (full_sync) + btrfs_wait_ordered_range(inode, start, end - start + 1); atomic_inc(&root->log_batch); /* @@ -1742,13 +1763,25 @@ int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync) if (ret != BTRFS_NO_LOG_SYNC) { if (ret > 0) { + /* + * If we didn't already wait for ordered extents we need + * to do that now. + */ + if (!full_sync) + btrfs_wait_ordered_range(inode, start, + end - start + 1); ret = btrfs_commit_transaction(trans, root); } else { ret = btrfs_sync_log(trans, root); - if (ret == 0) + if (ret == 0) { ret = btrfs_end_transaction(trans, root); - else + } else { + if (!full_sync) + btrfs_wait_ordered_range(inode, start, + end - + start + 1); ret = btrfs_commit_transaction(trans, root); + } } } else { ret = btrfs_end_transaction(trans, root); diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c index 0be7a8742a4..c8090f18c21 100644 --- a/fs/btrfs/free-space-cache.c +++ b/fs/btrfs/free-space-cache.c @@ -1356,6 +1356,8 @@ static void recalculate_thresholds(struct btrfs_free_space_ctl *ctl) u64 bytes_per_bg = BITS_PER_BITMAP * ctl->unit; int max_bitmaps = div64_u64(size + bytes_per_bg - 1, bytes_per_bg); + max_bitmaps = max(max_bitmaps, 1); + BUG_ON(ctl->total_bitmaps > max_bitmaps); /* @@ -1636,10 +1638,14 @@ static bool use_bitmap(struct btrfs_free_space_ctl *ctl, } /* - * some block groups are so tiny they can't be enveloped by a bitmap, so - * don't even bother to create a bitmap for this + * The original block groups from mkfs can be really small, like 8 + * megabytes, so don't bother with a bitmap for those entries. However + * some block groups can be smaller than what a bitmap would cover but + * are still large enough that they could overflow the 32k memory limit, + * so allow those block groups to still be allowed to have a bitmap + * entry. */ - if (BITS_PER_BITMAP * ctl->unit > block_group->key.offset) + if (((BITS_PER_BITMAP * ctl->unit) >> 1) > block_group->key.offset) return false; return true; diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index cc93b23ca35..1aa98be54ce 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -39,12 +39,12 @@ #include #include #include +#include #include "compat.h" #include "ctree.h" #include "disk-io.h" #include "transaction.h" #include "btrfs_inode.h" -#include "ioctl.h" #include "print-tree.h" #include "ordered-data.h" #include "xattr.h" @@ -608,7 +608,7 @@ static noinline int submit_compressed_extents(struct inode *inode, if (list_empty(&async_cow->extents)) return 0; - +again: while (!list_empty(&async_cow->extents)) { async_extent = list_entry(async_cow->extents.next, struct async_extent, list); @@ -648,6 +648,8 @@ retry: async_extent->ram_size - 1, btrfs_get_extent, WB_SYNC_ALL); + else if (ret) + unlock_page(async_cow->locked_page); kfree(async_extent); cond_resched(); continue; @@ -672,6 +674,7 @@ retry: if (ret) { int i; + for (i = 0; i < async_extent->nr_pages; i++) { WARN_ON(async_extent->pages[i]->mapping); page_cache_release(async_extent->pages[i]); @@ -679,12 +682,10 @@ retry: kfree(async_extent->pages); async_extent->nr_pages = 0; async_extent->pages = NULL; - unlock_extent(io_tree, async_extent->start, - async_extent->start + - async_extent->ram_size - 1); + if (ret == -ENOSPC) goto retry; - goto out_free; /* JDM: Requeue? */ + goto out_free; } /* @@ -696,10 +697,13 @@ retry: async_extent->ram_size - 1, 0); em = alloc_extent_map(); - BUG_ON(!em); /* -ENOMEM */ + if (!em) + goto out_free_reserve; em->start = async_extent->start; em->len = async_extent->ram_size; em->orig_start = em->start; + em->mod_start = em->start; + em->mod_len = em->len; em->block_start = ins.objectid; em->block_len = ins.offset; @@ -726,6 +730,9 @@ retry: async_extent->ram_size - 1, 0); } + if (ret) + goto out_free_reserve; + ret = btrfs_add_ordered_extent_compress(inode, async_extent->start, ins.objectid, @@ -733,7 +740,8 @@ retry: ins.offset, BTRFS_ORDERED_COMPRESSED, async_extent->compress_type); - BUG_ON(ret); /* -ENOMEM */ + if (ret) + goto out_free_reserve; /* * clear dirty, set writeback and unlock the pages. @@ -754,18 +762,30 @@ retry: ins.objectid, ins.offset, async_extent->pages, async_extent->nr_pages); - - BUG_ON(ret); /* -ENOMEM */ alloc_hint = ins.objectid + ins.offset; kfree(async_extent); + if (ret) + goto out; cond_resched(); } ret = 0; out: return ret; +out_free_reserve: + btrfs_free_reserved_extent(root, ins.objectid, ins.offset); out_free: + extent_clear_unlock_delalloc(inode, &BTRFS_I(inode)->io_tree, + async_extent->start, + async_extent->start + + async_extent->ram_size - 1, + NULL, EXTENT_CLEAR_UNLOCK_PAGE | + EXTENT_CLEAR_UNLOCK | + EXTENT_CLEAR_DELALLOC | + EXTENT_CLEAR_DIRTY | + EXTENT_SET_WRITEBACK | + EXTENT_END_WRITEBACK); kfree(async_extent); - goto out; + goto again; } static u64 get_extent_allocation_hint(struct inode *inode, u64 start, @@ -892,6 +912,8 @@ static noinline int __cow_file_range(struct btrfs_trans_handle *trans, em->orig_start = em->start; ram_size = ins.offset; em->len = ins.offset; + em->mod_start = em->start; + em->mod_len = em->len; em->block_start = ins.objectid; em->block_len = ins.offset; @@ -1338,6 +1360,8 @@ out_check: em->block_start = disk_bytenr; em->orig_block_len = disk_num_bytes; em->bdev = root->fs_info->fs_devices->latest_bdev; + em->mod_start = em->start; + em->mod_len = em->len; set_bit(EXTENT_FLAG_PINNED, &em->flags); set_bit(EXTENT_FLAG_FILLING, &em->flags); em->generation = -1; @@ -1508,14 +1532,22 @@ static void btrfs_set_bit_hook(struct inode *inode, spin_unlock(&BTRFS_I(inode)->lock); } - spin_lock(&root->fs_info->delalloc_lock); + __percpu_counter_add(&root->fs_info->delalloc_bytes, len, + root->fs_info->delalloc_batch); + spin_lock(&BTRFS_I(inode)->lock); BTRFS_I(inode)->delalloc_bytes += len; - root->fs_info->delalloc_bytes += len; - if (do_list && list_empty(&BTRFS_I(inode)->delalloc_inodes)) { - list_add_tail(&BTRFS_I(inode)->delalloc_inodes, - &root->fs_info->delalloc_inodes); + if (do_list && !test_bit(BTRFS_INODE_IN_DELALLOC_LIST, + &BTRFS_I(inode)->runtime_flags)) { + spin_lock(&root->fs_info->delalloc_lock); + if (list_empty(&BTRFS_I(inode)->delalloc_inodes)) { + list_add_tail(&BTRFS_I(inode)->delalloc_inodes, + &root->fs_info->delalloc_inodes); + set_bit(BTRFS_INODE_IN_DELALLOC_LIST, + &BTRFS_I(inode)->runtime_flags); + } + spin_unlock(&root->fs_info->delalloc_lock); } - spin_unlock(&root->fs_info->delalloc_lock); + spin_unlock(&BTRFS_I(inode)->lock); } } @@ -1550,15 +1582,22 @@ static void btrfs_clear_bit_hook(struct inode *inode, && do_list) btrfs_free_reserved_data_space(inode, len); - spin_lock(&root->fs_info->delalloc_lock); - root->fs_info->delalloc_bytes -= len; + __percpu_counter_add(&root->fs_info->delalloc_bytes, -len, + root->fs_info->delalloc_batch); + spin_lock(&BTRFS_I(inode)->lock); BTRFS_I(inode)->delalloc_bytes -= len; - if (do_list && BTRFS_I(inode)->delalloc_bytes == 0 && - !list_empty(&BTRFS_I(inode)->delalloc_inodes)) { - list_del_init(&BTRFS_I(inode)->delalloc_inodes); + test_bit(BTRFS_INODE_IN_DELALLOC_LIST, + &BTRFS_I(inode)->runtime_flags)) { + spin_lock(&root->fs_info->delalloc_lock); + if (!list_empty(&BTRFS_I(inode)->delalloc_inodes)) { + list_del_init(&BTRFS_I(inode)->delalloc_inodes); + clear_bit(BTRFS_INODE_IN_DELALLOC_LIST, + &BTRFS_I(inode)->runtime_flags); + } + spin_unlock(&root->fs_info->delalloc_lock); } - spin_unlock(&root->fs_info->delalloc_lock); + spin_unlock(&BTRFS_I(inode)->lock); } } @@ -2001,11 +2040,23 @@ out: if (trans) btrfs_end_transaction(trans, root); - if (ret) + if (ret) { clear_extent_uptodate(io_tree, ordered_extent->file_offset, ordered_extent->file_offset + ordered_extent->len - 1, NULL, GFP_NOFS); + /* + * If the ordered extent had an IOERR or something else went + * wrong we need to return the space for this ordered extent + * back to the allocator. + */ + if (!test_bit(BTRFS_ORDERED_NOCOW, &ordered_extent->flags) && + !test_bit(BTRFS_ORDERED_PREALLOC, &ordered_extent->flags)) + btrfs_free_reserved_extent(root, ordered_extent->start, + ordered_extent->disk_len); + } + + /* * This needs to be done to make sure anybody waiting knows we are done * updating everything for this ordered extent. @@ -2062,7 +2113,7 @@ static int btrfs_writepage_end_io_hook(struct page *page, u64 start, u64 end, static int btrfs_readpage_end_io_hook(struct page *page, u64 start, u64 end, struct extent_state *state, int mirror) { - size_t offset = start - ((u64)page->index << PAGE_CACHE_SHIFT); + size_t offset = start - page_offset(page); struct inode *inode = page->mapping->host; struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree; char *kaddr; @@ -2167,11 +2218,6 @@ void btrfs_run_delayed_iputs(struct btrfs_root *root) } } -enum btrfs_orphan_cleanup_state { - ORPHAN_CLEANUP_STARTED = 1, - ORPHAN_CLEANUP_DONE = 2, -}; - /* * This is called in transaction commit time. If there are no orphan * files in the subvolume, it removes orphan item and frees block_rsv @@ -2469,6 +2515,7 @@ int btrfs_orphan_cleanup(struct btrfs_root *root) */ set_bit(BTRFS_INODE_HAS_ORPHAN_ITEM, &BTRFS_I(inode)->runtime_flags); + atomic_inc(&root->orphan_inodes); /* if we have links, this was a truncate, lets do that */ if (inode->i_nlink) { @@ -2491,6 +2538,8 @@ int btrfs_orphan_cleanup(struct btrfs_root *root) goto out; ret = btrfs_truncate(inode); + if (ret) + btrfs_orphan_del(NULL, inode); } else { nr_unlink++; } @@ -2709,34 +2758,41 @@ static void fill_inode_item(struct btrfs_trans_handle *trans, struct btrfs_inode_item *item, struct inode *inode) { - btrfs_set_inode_uid(leaf, item, i_uid_read(inode)); - btrfs_set_inode_gid(leaf, item, i_gid_read(inode)); - btrfs_set_inode_size(leaf, item, BTRFS_I(inode)->disk_i_size); - btrfs_set_inode_mode(leaf, item, inode->i_mode); - btrfs_set_inode_nlink(leaf, item, inode->i_nlink); + struct btrfs_map_token token; + + btrfs_init_map_token(&token); - btrfs_set_timespec_sec(leaf, btrfs_inode_atime(item), - inode->i_atime.tv_sec); - btrfs_set_timespec_nsec(leaf, btrfs_inode_atime(item), - inode->i_atime.tv_nsec); + btrfs_set_token_inode_uid(leaf, item, i_uid_read(inode), &token); + btrfs_set_token_inode_gid(leaf, item, i_gid_read(inode), &token); + btrfs_set_token_inode_size(leaf, item, BTRFS_I(inode)->disk_i_size, + &token); + btrfs_set_token_inode_mode(leaf, item, inode->i_mode, &token); + btrfs_set_token_inode_nlink(leaf, item, inode->i_nlink, &token); - btrfs_set_timespec_sec(leaf, btrfs_inode_mtime(item), - inode->i_mtime.tv_sec); - btrfs_set_timespec_nsec(leaf, btrfs_inode_mtime(item), - inode->i_mtime.tv_nsec); + btrfs_set_token_timespec_sec(leaf, btrfs_inode_atime(item), + inode->i_atime.tv_sec, &token); + btrfs_set_token_timespec_nsec(leaf, btrfs_inode_atime(item), + inode->i_atime.tv_nsec, &token); - btrfs_set_timespec_sec(leaf, btrfs_inode_ctime(item), - inode->i_ctime.tv_sec); - btrfs_set_timespec_nsec(leaf, btrfs_inode_ctime(item), - inode->i_ctime.tv_nsec); + btrfs_set_token_timespec_sec(leaf, btrfs_inode_mtime(item), + inode->i_mtime.tv_sec, &token); + btrfs_set_token_timespec_nsec(leaf, btrfs_inode_mtime(item), + inode->i_mtime.tv_nsec, &token); - btrfs_set_inode_nbytes(leaf, item, inode_get_bytes(inode)); - btrfs_set_inode_generation(leaf, item, BTRFS_I(inode)->generation); - btrfs_set_inode_sequence(leaf, item, inode->i_version); - btrfs_set_inode_transid(leaf, item, trans->transid); - btrfs_set_inode_rdev(leaf, item, inode->i_rdev); - btrfs_set_inode_flags(leaf, item, BTRFS_I(inode)->flags); - btrfs_set_inode_block_group(leaf, item, 0); + btrfs_set_token_timespec_sec(leaf, btrfs_inode_ctime(item), + inode->i_ctime.tv_sec, &token); + btrfs_set_token_timespec_nsec(leaf, btrfs_inode_ctime(item), + inode->i_ctime.tv_nsec, &token); + + btrfs_set_token_inode_nbytes(leaf, item, inode_get_bytes(inode), + &token); + btrfs_set_token_inode_generation(leaf, item, BTRFS_I(inode)->generation, + &token); + btrfs_set_token_inode_sequence(leaf, item, inode->i_version, &token); + btrfs_set_token_inode_transid(leaf, item, trans->transid, &token); + btrfs_set_token_inode_rdev(leaf, item, inode->i_rdev, &token); + btrfs_set_token_inode_flags(leaf, item, BTRFS_I(inode)->flags, &token); + btrfs_set_token_inode_block_group(leaf, item, 0, &token); } /* @@ -3832,6 +3888,12 @@ static int btrfs_setsize(struct inode *inode, struct iattr *attr) /* we don't support swapfiles, so vmtruncate shouldn't fail */ truncate_setsize(inode, newsize); + + /* Disable nonlocked read DIO to avoid the end less truncate */ + btrfs_inode_block_unlocked_dio(inode); + inode_dio_wait(inode); + btrfs_inode_resume_unlocked_dio(inode); + ret = btrfs_truncate(inode); if (ret && inode->i_nlink) btrfs_orphan_del(NULL, inode); @@ -3904,6 +3966,12 @@ void btrfs_evict_inode(struct inode *inode) goto no_delete; } + ret = btrfs_commit_inode_delayed_inode(inode); + if (ret) { + btrfs_orphan_del(NULL, inode); + goto no_delete; + } + rsv = btrfs_alloc_block_rsv(root, BTRFS_BLOCK_RSV_TEMP); if (!rsv) { btrfs_orphan_del(NULL, inode); @@ -3941,7 +4009,7 @@ void btrfs_evict_inode(struct inode *inode) goto no_delete; } - trans = btrfs_start_transaction_lflush(root, 1); + trans = btrfs_join_transaction(root); if (IS_ERR(trans)) { btrfs_orphan_del(NULL, inode); btrfs_free_block_rsv(root, rsv); @@ -3955,9 +4023,6 @@ void btrfs_evict_inode(struct inode *inode) break; trans->block_rsv = &root->fs_info->trans_block_rsv; - ret = btrfs_update_inode(trans, root, inode); - BUG_ON(ret); - btrfs_end_transaction(trans, root); trans = NULL; btrfs_btree_balance_dirty(root); @@ -5006,12 +5071,6 @@ static int btrfs_mknod(struct inode *dir, struct dentry *dentry, goto out_unlock; } - err = btrfs_update_inode(trans, root, inode); - if (err) { - drop_inode = 1; - goto out_unlock; - } - /* * If the active LSM wants to access the inode during * d_instantiate it needs these. Smack checks to see @@ -5949,6 +6008,8 @@ static struct extent_map *create_pinned_em(struct inode *inode, u64 start, em->start = start; em->orig_start = orig_start; + em->mod_start = start; + em->mod_len = len; em->len = len; em->block_len = block_len; em->block_start = block_start; @@ -5990,16 +6051,15 @@ static int btrfs_get_blocks_direct(struct inode *inode, sector_t iblock, u64 len = bh_result->b_size; struct btrfs_trans_handle *trans; int unlock_bits = EXTENT_LOCKED; - int ret; + int ret = 0; if (create) { - ret = btrfs_delalloc_reserve_space(inode, len); - if (ret) - return ret; + spin_lock(&BTRFS_I(inode)->lock); + BTRFS_I(inode)->outstanding_extents++; + spin_unlock(&BTRFS_I(inode)->lock); unlock_bits |= EXTENT_DELALLOC | EXTENT_DIRTY; - } else { + } else len = min_t(u64, len, root->sectorsize); - } lockstart = start; lockend = start + len - 1; @@ -6011,14 +6071,6 @@ static int btrfs_get_blocks_direct(struct inode *inode, sector_t iblock, if (lock_extent_direct(inode, lockstart, lockend, &cached_state, create)) return -ENOTBLK; - if (create) { - ret = set_extent_bit(&BTRFS_I(inode)->io_tree, lockstart, - lockend, EXTENT_DELALLOC, NULL, - &cached_state, GFP_NOFS); - if (ret) - goto unlock_err; - } - em = btrfs_get_extent(inode, NULL, 0, start, len, 0); if (IS_ERR(em)) { ret = PTR_ERR(em); @@ -6050,7 +6102,6 @@ static int btrfs_get_blocks_direct(struct inode *inode, sector_t iblock, if (!create && (em->block_start == EXTENT_MAP_HOLE || test_bit(EXTENT_FLAG_PREALLOC, &em->flags))) { free_extent_map(em); - ret = 0; goto unlock_err; } @@ -6148,6 +6199,11 @@ unlock: */ if (start + len > i_size_read(inode)) i_size_write(inode, start + len); + + ret = set_extent_bit(&BTRFS_I(inode)->io_tree, lockstart, + lockstart + len - 1, EXTENT_DELALLOC, NULL, + &cached_state, GFP_NOFS); + BUG_ON(ret); } /* @@ -6156,24 +6212,9 @@ unlock: * aren't using if there is any left over space. */ if (lockstart < lockend) { - if (create && len < lockend - lockstart) { - clear_extent_bit(&BTRFS_I(inode)->io_tree, lockstart, - lockstart + len - 1, - unlock_bits | EXTENT_DEFRAG, 1, 0, - &cached_state, GFP_NOFS); - /* - * Beside unlock, we also need to cleanup reserved space - * for the left range by attaching EXTENT_DO_ACCOUNTING. - */ - clear_extent_bit(&BTRFS_I(inode)->io_tree, - lockstart + len, lockend, - unlock_bits | EXTENT_DO_ACCOUNTING | - EXTENT_DEFRAG, 1, 0, NULL, GFP_NOFS); - } else { - clear_extent_bit(&BTRFS_I(inode)->io_tree, lockstart, - lockend, unlock_bits, 1, 0, - &cached_state, GFP_NOFS); - } + clear_extent_bit(&BTRFS_I(inode)->io_tree, lockstart, + lockend, unlock_bits, 1, 0, + &cached_state, GFP_NOFS); } else { free_extent_state(cached_state); } @@ -6183,9 +6224,6 @@ unlock: return 0; unlock_err: - if (create) - unlock_bits |= EXTENT_DO_ACCOUNTING; - clear_extent_bit(&BTRFS_I(inode)->io_tree, lockstart, lockend, unlock_bits, 1, 0, &cached_state, GFP_NOFS); return ret; @@ -6623,15 +6661,63 @@ static ssize_t btrfs_direct_IO(int rw, struct kiocb *iocb, { struct file *file = iocb->ki_filp; struct inode *inode = file->f_mapping->host; + size_t count = 0; + int flags = 0; + bool wakeup = true; + bool relock = false; + ssize_t ret; if (check_direct_IO(BTRFS_I(inode)->root, rw, iocb, iov, offset, nr_segs)) return 0; - return __blockdev_direct_IO(rw, iocb, inode, - BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev, - iov, offset, nr_segs, btrfs_get_blocks_direct, NULL, - btrfs_submit_direct, 0); + atomic_inc(&inode->i_dio_count); + smp_mb__after_atomic_inc(); + + if (rw & WRITE) { + count = iov_length(iov, nr_segs); + /* + * If the write DIO is beyond the EOF, we need update + * the isize, but it is protected by i_mutex. So we can + * not unlock the i_mutex at this case. + */ + if (offset + count <= inode->i_size) { + mutex_unlock(&inode->i_mutex); + relock = true; + } + ret = btrfs_delalloc_reserve_space(inode, count); + if (ret) + goto out; + } else if (unlikely(test_bit(BTRFS_INODE_READDIO_NEED_LOCK, + &BTRFS_I(inode)->runtime_flags))) { + inode_dio_done(inode); + flags = DIO_LOCKING | DIO_SKIP_HOLES; + wakeup = false; + } + + ret = __blockdev_direct_IO(rw, iocb, inode, + BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev, + iov, offset, nr_segs, btrfs_get_blocks_direct, NULL, + btrfs_submit_direct, flags); + if (rw & WRITE) { + if (ret < 0 && ret != -EIOCBQUEUED) + btrfs_delalloc_release_space(inode, count); + else if (ret > 0 && (size_t)ret < count) { + spin_lock(&BTRFS_I(inode)->lock); + BTRFS_I(inode)->outstanding_extents++; + spin_unlock(&BTRFS_I(inode)->lock); + btrfs_delalloc_release_space(inode, + count - (size_t)ret); + } + btrfs_delalloc_release_metadata(inode, 0); + } +out: + if (wakeup) + inode_dio_done(inode); + if (relock) + mutex_lock(&inode->i_mutex); + + return ret; } #define BTRFS_FIEMAP_FLAGS (FIEMAP_FLAG_SYNC) @@ -6735,8 +6821,7 @@ static void btrfs_invalidatepage(struct page *page, unsigned long offset) return; } lock_extent_bits(tree, page_start, page_end, 0, &cached_state); - ordered = btrfs_lookup_ordered_extent(inode, - page_offset(page)); + ordered = btrfs_lookup_ordered_extent(inode, page_offset(page)); if (ordered) { /* * IO on this page will never be started, so we need @@ -7216,8 +7301,9 @@ int btrfs_drop_inode(struct inode *inode) { struct btrfs_root *root = BTRFS_I(inode)->root; + /* the snap/subvol tree is on deleting */ if (btrfs_root_refs(&root->root_item) == 0 && - !btrfs_is_free_space_inode(inode)) + root != root->fs_info->tree_root) return 1; else return generic_drop_inode(inode); @@ -7299,14 +7385,19 @@ fail: static int btrfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) { + u64 delalloc_bytes; struct inode *inode = dentry->d_inode; u32 blocksize = inode->i_sb->s_blocksize; generic_fillattr(inode, stat); stat->dev = BTRFS_I(inode)->root->anon_dev; stat->blksize = PAGE_CACHE_SIZE; + + spin_lock(&BTRFS_I(inode)->lock); + delalloc_bytes = BTRFS_I(inode)->delalloc_bytes; + spin_unlock(&BTRFS_I(inode)->lock); stat->blocks = (ALIGN(inode_get_bytes(inode), blocksize) + - ALIGN(BTRFS_I(inode)->delalloc_bytes, blocksize)) >> 9; + ALIGN(delalloc_bytes, blocksize)) >> 9; return 0; } @@ -7583,7 +7674,7 @@ int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput) INIT_LIST_HEAD(&works); INIT_LIST_HEAD(&splice); -again: + spin_lock(&root->fs_info->delalloc_lock); list_splice_init(&root->fs_info->delalloc_inodes, &splice); while (!list_empty(&splice)) { @@ -7593,8 +7684,11 @@ again: list_del_init(&binode->delalloc_inodes); inode = igrab(&binode->vfs_inode); - if (!inode) + if (!inode) { + clear_bit(BTRFS_INODE_IN_DELALLOC_LIST, + &binode->runtime_flags); continue; + } list_add_tail(&binode->delalloc_inodes, &root->fs_info->delalloc_inodes); @@ -7619,13 +7713,6 @@ again: btrfs_wait_and_free_delalloc_work(work); } - spin_lock(&root->fs_info->delalloc_lock); - if (!list_empty(&root->fs_info->delalloc_inodes)) { - spin_unlock(&root->fs_info->delalloc_lock); - goto again; - } - spin_unlock(&root->fs_info->delalloc_lock); - /* the filemap_flush will queue IO into the worker threads, but * we have to make sure the IO is actually started and that * ordered extents get created before we return diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 338f2597bf7..059546aa8fd 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -42,12 +42,12 @@ #include #include #include +#include #include "compat.h" #include "ctree.h" #include "disk-io.h" #include "transaction.h" #include "btrfs_inode.h" -#include "ioctl.h" #include "print-tree.h" #include "volumes.h" #include "locking.h" @@ -367,7 +367,7 @@ static noinline int create_subvol(struct btrfs_root *root, struct dentry *dentry, char *name, int namelen, u64 *async_transid, - struct btrfs_qgroup_inherit **inherit) + struct btrfs_qgroup_inherit *inherit) { struct btrfs_trans_handle *trans; struct btrfs_key key; @@ -401,8 +401,7 @@ static noinline int create_subvol(struct btrfs_root *root, if (IS_ERR(trans)) return PTR_ERR(trans); - ret = btrfs_qgroup_inherit(trans, root->fs_info, 0, objectid, - inherit ? *inherit : NULL); + ret = btrfs_qgroup_inherit(trans, root->fs_info, 0, objectid, inherit); if (ret) goto fail; @@ -533,7 +532,7 @@ fail: static int create_snapshot(struct btrfs_root *root, struct dentry *dentry, char *name, int namelen, u64 *async_transid, - bool readonly, struct btrfs_qgroup_inherit **inherit) + bool readonly, struct btrfs_qgroup_inherit *inherit) { struct inode *inode; struct btrfs_pending_snapshot *pending_snapshot; @@ -552,10 +551,7 @@ static int create_snapshot(struct btrfs_root *root, struct dentry *dentry, pending_snapshot->dentry = dentry; pending_snapshot->root = root; pending_snapshot->readonly = readonly; - if (inherit) { - pending_snapshot->inherit = *inherit; - *inherit = NULL; /* take responsibility to free it */ - } + pending_snapshot->inherit = inherit; trans = btrfs_start_transaction(root->fs_info->extent_root, 6); if (IS_ERR(trans)) { @@ -695,7 +691,7 @@ static noinline int btrfs_mksubvol(struct path *parent, char *name, int namelen, struct btrfs_root *snap_src, u64 *async_transid, bool readonly, - struct btrfs_qgroup_inherit **inherit) + struct btrfs_qgroup_inherit *inherit) { struct inode *dir = parent->dentry->d_inode; struct dentry *dentry; @@ -818,7 +814,7 @@ static int find_new_extents(struct btrfs_root *root, while(1) { ret = btrfs_search_forward(root, &min_key, &max_key, - path, 0, newer_than); + path, newer_than); if (ret != 0) goto none; if (min_key.objectid != ino) @@ -1206,6 +1202,12 @@ int btrfs_defrag_file(struct inode *inode, struct file *file, if (!(inode->i_sb->s_flags & MS_ACTIVE)) break; + if (btrfs_defrag_cancelled(root->fs_info)) { + printk(KERN_DEBUG "btrfs: defrag_file cancelled\n"); + ret = -EAGAIN; + break; + } + if (!should_defrag_range(inode, (u64)i << PAGE_CACHE_SHIFT, extent_thresh, &last_len, &skip, &defrag_end, range->flags & @@ -1329,9 +1331,6 @@ static noinline int btrfs_ioctl_resize(struct file *file, int ret = 0; int mod = 0; - if (root->fs_info->sb->s_flags & MS_RDONLY) - return -EROFS; - if (!capable(CAP_SYS_ADMIN)) return -EPERM; @@ -1363,6 +1362,10 @@ static noinline int btrfs_ioctl_resize(struct file *file, *devstr = '\0'; devstr = vol_args->name; devid = simple_strtoull(devstr, &end, 10); + if (!devid) { + ret = -EINVAL; + goto out_free; + } printk(KERN_INFO "btrfs: resizing devid %llu\n", (unsigned long long)devid); } @@ -1371,7 +1374,7 @@ static noinline int btrfs_ioctl_resize(struct file *file, if (!device) { printk(KERN_INFO "btrfs: resizer unable to find device %llu\n", (unsigned long long)devid); - ret = -EINVAL; + ret = -ENODEV; goto out_free; } @@ -1379,7 +1382,7 @@ static noinline int btrfs_ioctl_resize(struct file *file, printk(KERN_INFO "btrfs: resizer unable to apply on " "readonly device %llu\n", (unsigned long long)devid); - ret = -EINVAL; + ret = -EPERM; goto out_free; } @@ -1401,7 +1404,7 @@ static noinline int btrfs_ioctl_resize(struct file *file, } if (device->is_tgtdev_for_dev_replace) { - ret = -EINVAL; + ret = -EPERM; goto out_free; } @@ -1457,7 +1460,7 @@ out: static noinline int btrfs_ioctl_snap_create_transid(struct file *file, char *name, unsigned long fd, int subvol, u64 *transid, bool readonly, - struct btrfs_qgroup_inherit **inherit) + struct btrfs_qgroup_inherit *inherit) { int namelen; int ret = 0; @@ -1566,7 +1569,7 @@ static noinline int btrfs_ioctl_snap_create_v2(struct file *file, ret = btrfs_ioctl_snap_create_transid(file, vol_args->name, vol_args->fd, subvol, ptr, - readonly, &inherit); + readonly, inherit); if (ret == 0 && ptr && copy_to_user(arg + @@ -1863,7 +1866,7 @@ static noinline int search_ioctl(struct inode *inode, path->keep_locks = 1; while(1) { - ret = btrfs_search_forward(root, &key, &max_key, path, 0, + ret = btrfs_search_forward(root, &key, &max_key, path, sk->min_transid); if (ret != 0) { if (ret > 0) @@ -2171,6 +2174,12 @@ out_unlock: shrink_dcache_sb(root->fs_info->sb); btrfs_invalidate_inodes(dest); d_delete(dentry); + + /* the last ref */ + if (dest->cache_inode) { + iput(dest->cache_inode); + dest->cache_inode = NULL; + } } out_dput: dput(dentry); @@ -2211,10 +2220,10 @@ static int btrfs_ioctl_defrag(struct file *file, void __user *argp) ret = -EPERM; goto out; } - ret = btrfs_defrag_root(root, 0); + ret = btrfs_defrag_root(root); if (ret) goto out; - ret = btrfs_defrag_root(root->fs_info->extent_root, 0); + ret = btrfs_defrag_root(root->fs_info->extent_root); break; case S_IFREG: if (!(file->f_mode & FMODE_WRITE)) { @@ -3111,7 +3120,7 @@ static noinline long btrfs_ioctl_start_sync(struct btrfs_root *root, u64 transid; int ret; - trans = btrfs_attach_transaction(root); + trans = btrfs_attach_transaction_barrier(root); if (IS_ERR(trans)) { if (PTR_ERR(trans) != -ENOENT) return PTR_ERR(trans); @@ -3289,7 +3298,7 @@ static long btrfs_ioctl_ino_to_path(struct btrfs_root *root, void __user *arg) struct inode_fs_paths *ipath = NULL; struct btrfs_path *path; - if (!capable(CAP_SYS_ADMIN)) + if (!capable(CAP_DAC_READ_SEARCH)) return -EPERM; path = btrfs_alloc_path(); @@ -3914,6 +3923,65 @@ out: return ret; } +static int btrfs_ioctl_get_fslabel(struct file *file, void __user *arg) +{ + struct btrfs_root *root = BTRFS_I(fdentry(file)->d_inode)->root; + const char *label = root->fs_info->super_copy->label; + size_t len = strnlen(label, BTRFS_LABEL_SIZE); + int ret; + + if (len == BTRFS_LABEL_SIZE) { + pr_warn("btrfs: label is too long, return the first %zu bytes\n", + --len); + } + + mutex_lock(&root->fs_info->volume_mutex); + ret = copy_to_user(arg, label, len); + mutex_unlock(&root->fs_info->volume_mutex); + + return ret ? -EFAULT : 0; +} + +static int btrfs_ioctl_set_fslabel(struct file *file, void __user *arg) +{ + struct btrfs_root *root = BTRFS_I(fdentry(file)->d_inode)->root; + struct btrfs_super_block *super_block = root->fs_info->super_copy; + struct btrfs_trans_handle *trans; + char label[BTRFS_LABEL_SIZE]; + int ret; + + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + + if (copy_from_user(label, arg, sizeof(label))) + return -EFAULT; + + if (strnlen(label, BTRFS_LABEL_SIZE) == BTRFS_LABEL_SIZE) { + pr_err("btrfs: unable to set label with more than %d bytes\n", + BTRFS_LABEL_SIZE - 1); + return -EINVAL; + } + + ret = mnt_want_write_file(file); + if (ret) + return ret; + + mutex_lock(&root->fs_info->volume_mutex); + trans = btrfs_start_transaction(root, 0); + if (IS_ERR(trans)) { + ret = PTR_ERR(trans); + goto out_unlock; + } + + strcpy(super_block->label, label); + ret = btrfs_end_transaction(trans, root); + +out_unlock: + mutex_unlock(&root->fs_info->volume_mutex); + mnt_drop_write_file(file); + return ret; +} + long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { @@ -4014,6 +4082,10 @@ long btrfs_ioctl(struct file *file, unsigned int return btrfs_ioctl_qgroup_limit(file, argp); case BTRFS_IOC_DEV_REPLACE: return btrfs_ioctl_dev_replace(root, argp); + case BTRFS_IOC_GET_FSLABEL: + return btrfs_ioctl_get_fslabel(file, argp); + case BTRFS_IOC_SET_FSLABEL: + return btrfs_ioctl_set_fslabel(file, argp); } return -ENOTTY; diff --git a/fs/btrfs/locking.c b/fs/btrfs/locking.c index 2a1762c6604..e95df435d89 100644 --- a/fs/btrfs/locking.c +++ b/fs/btrfs/locking.c @@ -113,11 +113,10 @@ again: read_unlock(&eb->lock); return; } - read_unlock(&eb->lock); - wait_event(eb->write_lock_wq, atomic_read(&eb->blocking_writers) == 0); - read_lock(&eb->lock); if (atomic_read(&eb->blocking_writers)) { read_unlock(&eb->lock); + wait_event(eb->write_lock_wq, + atomic_read(&eb->blocking_writers) == 0); goto again; } atomic_inc(&eb->read_locks); diff --git a/fs/btrfs/ordered-data.c b/fs/btrfs/ordered-data.c index e5ed5672960..dc08d77b717 100644 --- a/fs/btrfs/ordered-data.c +++ b/fs/btrfs/ordered-data.c @@ -196,6 +196,9 @@ static int __btrfs_add_ordered_extent(struct inode *inode, u64 file_offset, entry->file_offset = file_offset; entry->start = start; entry->len = len; + if (!(BTRFS_I(inode)->flags & BTRFS_INODE_NODATASUM) && + !(type == BTRFS_ORDERED_NOCOW)) + entry->csum_bytes_left = disk_len; entry->disk_len = disk_len; entry->bytes_left = len; entry->inode = igrab(inode); @@ -213,6 +216,7 @@ static int __btrfs_add_ordered_extent(struct inode *inode, u64 file_offset, INIT_LIST_HEAD(&entry->root_extent_list); INIT_LIST_HEAD(&entry->work_list); init_completion(&entry->completion); + INIT_LIST_HEAD(&entry->log_list); trace_btrfs_ordered_extent_add(inode, entry); @@ -270,6 +274,10 @@ void btrfs_add_ordered_sum(struct inode *inode, tree = &BTRFS_I(inode)->ordered_tree; spin_lock_irq(&tree->lock); list_add_tail(&sum->list, &entry->list); + WARN_ON(entry->csum_bytes_left < sum->len); + entry->csum_bytes_left -= sum->len; + if (entry->csum_bytes_left == 0) + wake_up(&entry->wait); spin_unlock_irq(&tree->lock); } @@ -405,6 +413,66 @@ out: return ret == 0; } +/* Needs to either be called under a log transaction or the log_mutex */ +void btrfs_get_logged_extents(struct btrfs_root *log, struct inode *inode) +{ + struct btrfs_ordered_inode_tree *tree; + struct btrfs_ordered_extent *ordered; + struct rb_node *n; + int index = log->log_transid % 2; + + tree = &BTRFS_I(inode)->ordered_tree; + spin_lock_irq(&tree->lock); + for (n = rb_first(&tree->tree); n; n = rb_next(n)) { + ordered = rb_entry(n, struct btrfs_ordered_extent, rb_node); + spin_lock(&log->log_extents_lock[index]); + if (list_empty(&ordered->log_list)) { + list_add_tail(&ordered->log_list, &log->logged_list[index]); + atomic_inc(&ordered->refs); + } + spin_unlock(&log->log_extents_lock[index]); + } + spin_unlock_irq(&tree->lock); +} + +void btrfs_wait_logged_extents(struct btrfs_root *log, u64 transid) +{ + struct btrfs_ordered_extent *ordered; + int index = transid % 2; + + spin_lock_irq(&log->log_extents_lock[index]); + while (!list_empty(&log->logged_list[index])) { + ordered = list_first_entry(&log->logged_list[index], + struct btrfs_ordered_extent, + log_list); + list_del_init(&ordered->log_list); + spin_unlock_irq(&log->log_extents_lock[index]); + wait_event(ordered->wait, test_bit(BTRFS_ORDERED_IO_DONE, + &ordered->flags)); + btrfs_put_ordered_extent(ordered); + spin_lock_irq(&log->log_extents_lock[index]); + } + spin_unlock_irq(&log->log_extents_lock[index]); +} + +void btrfs_free_logged_extents(struct btrfs_root *log, u64 transid) +{ + struct btrfs_ordered_extent *ordered; + int index = transid % 2; + + spin_lock_irq(&log->log_extents_lock[index]); + while (!list_empty(&log->logged_list[index])) { + ordered = list_first_entry(&log->logged_list[index], + struct btrfs_ordered_extent, + log_list); + list_del_init(&ordered->log_list); + spin_unlock_irq(&log->log_extents_lock[index]); + btrfs_put_ordered_extent(ordered); + spin_lock_irq(&log->log_extents_lock[index]); + } + spin_unlock_irq(&log->log_extents_lock[index]); +} + /* * used to drop a reference on an ordered extent. This will free * the extent if the last reference is dropped @@ -544,10 +612,12 @@ void btrfs_wait_ordered_extents(struct btrfs_root *root, int delay_iput) * extra check to make sure the ordered operation list really is empty * before we return */ -int btrfs_run_ordered_operations(struct btrfs_root *root, int wait) +int btrfs_run_ordered_operations(struct btrfs_trans_handle *trans, + struct btrfs_root *root, int wait) { struct btrfs_inode *btrfs_inode; struct inode *inode; + struct btrfs_transaction *cur_trans = trans->transaction; struct list_head splice; struct list_head works; struct btrfs_delalloc_work *work, *next; @@ -558,14 +628,10 @@ int btrfs_run_ordered_operations(struct btrfs_root *root, int wait) mutex_lock(&root->fs_info->ordered_operations_mutex); spin_lock(&root->fs_info->ordered_extent_lock); -again: - list_splice_init(&root->fs_info->ordered_operations, &splice); - + list_splice_init(&cur_trans->ordered_operations, &splice); while (!list_empty(&splice)) { - btrfs_inode = list_entry(splice.next, struct btrfs_inode, ordered_operations); - inode = &btrfs_inode->vfs_inode; list_del_init(&btrfs_inode->ordered_operations); @@ -574,24 +640,22 @@ again: * the inode may be getting freed (in sys_unlink path). */ inode = igrab(inode); - - if (!wait && inode) { - list_add_tail(&BTRFS_I(inode)->ordered_operations, - &root->fs_info->ordered_operations); - } - if (!inode) continue; + + if (!wait) + list_add_tail(&BTRFS_I(inode)->ordered_operations, + &cur_trans->ordered_operations); spin_unlock(&root->fs_info->ordered_extent_lock); work = btrfs_alloc_delalloc_work(inode, wait, 1); if (!work) { + spin_lock(&root->fs_info->ordered_extent_lock); if (list_empty(&BTRFS_I(inode)->ordered_operations)) list_add_tail(&btrfs_inode->ordered_operations, &splice); - spin_lock(&root->fs_info->ordered_extent_lock); list_splice_tail(&splice, - &root->fs_info->ordered_operations); + &cur_trans->ordered_operations); spin_unlock(&root->fs_info->ordered_extent_lock); ret = -ENOMEM; goto out; @@ -603,9 +667,6 @@ again: cond_resched(); spin_lock(&root->fs_info->ordered_extent_lock); } - if (wait && !list_empty(&root->fs_info->ordered_operations)) - goto again; - spin_unlock(&root->fs_info->ordered_extent_lock); out: list_for_each_entry_safe(work, next, &works, list) { @@ -974,6 +1035,7 @@ out: void btrfs_add_ordered_operation(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct inode *inode) { + struct btrfs_transaction *cur_trans = trans->transaction; u64 last_mod; last_mod = max(BTRFS_I(inode)->generation, BTRFS_I(inode)->last_trans); @@ -988,7 +1050,7 @@ void btrfs_add_ordered_operation(struct btrfs_trans_handle *trans, spin_lock(&root->fs_info->ordered_extent_lock); if (list_empty(&BTRFS_I(inode)->ordered_operations)) { list_add_tail(&BTRFS_I(inode)->ordered_operations, - &root->fs_info->ordered_operations); + &cur_trans->ordered_operations); } spin_unlock(&root->fs_info->ordered_extent_lock); } diff --git a/fs/btrfs/ordered-data.h b/fs/btrfs/ordered-data.h index f29d4bf5fbe..8eadfe406cd 100644 --- a/fs/btrfs/ordered-data.h +++ b/fs/btrfs/ordered-data.h @@ -79,6 +79,8 @@ struct btrfs_ordered_sum { #define BTRFS_ORDERED_UPDATED_ISIZE 7 /* indicates whether this ordered extent * has done its due diligence in updating * the isize. */ +#define BTRFS_ORDERED_LOGGED_CSUM 8 /* We've logged the csums on this ordered + ordered extent */ struct btrfs_ordered_extent { /* logical offset in the file */ @@ -96,6 +98,9 @@ struct btrfs_ordered_extent { /* number of bytes that still need writing */ u64 bytes_left; + /* number of bytes that still need csumming */ + u64 csum_bytes_left; + /* * the end of the ordered extent which is behind it but * didn't update disk_i_size. Please see the comment of @@ -118,6 +123,9 @@ struct btrfs_ordered_extent { /* list of checksums for insertion when the extent io is done */ struct list_head list; + /* If we need to wait on this to be done */ + struct list_head log_list; + /* used to wait for the BTRFS_ORDERED_COMPLETE bit */ wait_queue_head_t wait; @@ -189,11 +197,15 @@ struct btrfs_ordered_extent *btrfs_lookup_ordered_range(struct inode *inode, int btrfs_ordered_update_i_size(struct inode *inode, u64 offset, struct btrfs_ordered_extent *ordered); int btrfs_find_ordered_sum(struct inode *inode, u64 offset, u64 disk_bytenr, u32 *sum); -int btrfs_run_ordered_operations(struct btrfs_root *root, int wait); +int btrfs_run_ordered_operations(struct btrfs_trans_handle *trans, + struct btrfs_root *root, int wait); void btrfs_add_ordered_operation(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct inode *inode); void btrfs_wait_ordered_extents(struct btrfs_root *root, int delay_iput); +void btrfs_get_logged_extents(struct btrfs_root *log, struct inode *inode); +void btrfs_wait_logged_extents(struct btrfs_root *log, u64 transid); +void btrfs_free_logged_extents(struct btrfs_root *log, u64 transid); int __init ordered_data_init(void); void ordered_data_exit(void); #endif diff --git a/fs/btrfs/print-tree.c b/fs/btrfs/print-tree.c index 50d95fd190a..920957ecb27 100644 --- a/fs/btrfs/print-tree.c +++ b/fs/btrfs/print-tree.c @@ -294,6 +294,7 @@ void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l) btrfs_dev_extent_chunk_offset(l, dev_extent), (unsigned long long) btrfs_dev_extent_length(l, dev_extent)); + break; case BTRFS_DEV_STATS_KEY: printk(KERN_INFO "\t\tdevice stats\n"); break; diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c index a5c85623432..88ab785bbd7 100644 --- a/fs/btrfs/qgroup.c +++ b/fs/btrfs/qgroup.c @@ -23,13 +23,13 @@ #include #include #include +#include #include "ctree.h" #include "transaction.h" #include "disk-io.h" #include "locking.h" #include "ulist.h" -#include "ioctl.h" #include "backref.h" /* TODO XXX FIXME @@ -847,6 +847,10 @@ int btrfs_quota_disable(struct btrfs_trans_handle *trans, int ret = 0; spin_lock(&fs_info->qgroup_lock); + if (!fs_info->quota_root) { + spin_unlock(&fs_info->qgroup_lock); + return 0; + } fs_info->quota_enabled = 0; fs_info->pending_quota_state = 0; quota_root = fs_info->quota_root; diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c index 300e09ac365..ba5a3210da9 100644 --- a/fs/btrfs/relocation.c +++ b/fs/btrfs/relocation.c @@ -3017,7 +3017,7 @@ static int relocate_file_extent_cluster(struct inode *inode, } } - page_start = (u64)page->index << PAGE_CACHE_SHIFT; + page_start = page_offset(page); page_end = page_start + PAGE_CACHE_SIZE - 1; lock_extent(&BTRFS_I(inode)->io_tree, page_start, page_end); diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c index 67783e03d12..c78b2a3fc33 100644 --- a/fs/btrfs/scrub.c +++ b/fs/btrfs/scrub.c @@ -2708,7 +2708,7 @@ static noinline_for_stack int scrub_supers(struct scrub_ctx *sctx, int ret; struct btrfs_root *root = sctx->dev_root; - if (root->fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR) + if (test_bit(BTRFS_FS_STATE_ERROR, &root->fs_info->fs_state)) return -EIO; gen = root->fs_info->last_trans_committed; diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c index 321b7fb4e44..68da757615a 100644 --- a/fs/btrfs/send.c +++ b/fs/btrfs/send.c @@ -85,6 +85,7 @@ struct send_ctx { u32 send_max_size; u64 total_send_size; u64 cmd_send_size[BTRFS_SEND_C_MAX + 1]; + u64 flags; /* 'flags' member of btrfs_ioctl_send_args is u64 */ struct vfsmount *mnt; @@ -3709,6 +3710,39 @@ out: return ret; } +/* + * Send an update extent command to user space. + */ +static int send_update_extent(struct send_ctx *sctx, + u64 offset, u32 len) +{ + int ret = 0; + struct fs_path *p; + + p = fs_path_alloc(sctx); + if (!p) + return -ENOMEM; + + ret = begin_cmd(sctx, BTRFS_SEND_C_UPDATE_EXTENT); + if (ret < 0) + goto out; + + ret = get_cur_path(sctx, sctx->cur_ino, sctx->cur_inode_gen, p); + if (ret < 0) + goto out; + + TLV_PUT_PATH(sctx, BTRFS_SEND_A_PATH, p); + TLV_PUT_U64(sctx, BTRFS_SEND_A_FILE_OFFSET, offset); + TLV_PUT_U64(sctx, BTRFS_SEND_A_SIZE, len); + + ret = send_cmd(sctx); + +tlv_put_failure: +out: + fs_path_free(sctx, p); + return ret; +} + static int send_write_or_clone(struct send_ctx *sctx, struct btrfs_path *path, struct btrfs_key *key, @@ -3744,7 +3778,11 @@ static int send_write_or_clone(struct send_ctx *sctx, goto out; } - if (!clone_root) { + if (clone_root) { + ret = send_clone(sctx, offset, len, clone_root); + } else if (sctx->flags & BTRFS_SEND_FLAG_NO_FILE_DATA) { + ret = send_update_extent(sctx, offset, len); + } else { while (pos < len) { l = len - pos; if (l > BTRFS_SEND_READ_SIZE) @@ -3757,10 +3795,7 @@ static int send_write_or_clone(struct send_ctx *sctx, pos += ret; } ret = 0; - } else { - ret = send_clone(sctx, offset, len, clone_root); } - out: return ret; } @@ -4536,7 +4571,6 @@ long btrfs_ioctl_send(struct file *mnt_file, void __user *arg_) struct btrfs_fs_info *fs_info; struct btrfs_ioctl_send_args *arg = NULL; struct btrfs_key key; - struct file *filp = NULL; struct send_ctx *sctx = NULL; u32 i; u64 *clone_sources_tmp = NULL; @@ -4561,6 +4595,11 @@ long btrfs_ioctl_send(struct file *mnt_file, void __user *arg_) goto out; } + if (arg->flags & ~BTRFS_SEND_FLAG_NO_FILE_DATA) { + ret = -EINVAL; + goto out; + } + sctx = kzalloc(sizeof(struct send_ctx), GFP_NOFS); if (!sctx) { ret = -ENOMEM; @@ -4572,6 +4611,8 @@ long btrfs_ioctl_send(struct file *mnt_file, void __user *arg_) INIT_RADIX_TREE(&sctx->name_cache, GFP_NOFS); INIT_LIST_HEAD(&sctx->name_cache_list); + sctx->flags = arg->flags; + sctx->send_filp = fget(arg->send_fd); if (IS_ERR(sctx->send_filp)) { ret = PTR_ERR(sctx->send_filp); @@ -4673,8 +4714,6 @@ long btrfs_ioctl_send(struct file *mnt_file, void __user *arg_) goto out; out: - if (filp) - fput(filp); kfree(arg); vfree(clone_sources_tmp); diff --git a/fs/btrfs/send.h b/fs/btrfs/send.h index 1bf4f32fd4e..8bb18f7ccaa 100644 --- a/fs/btrfs/send.h +++ b/fs/btrfs/send.h @@ -86,6 +86,7 @@ enum btrfs_send_cmd { BTRFS_SEND_C_UTIMES, BTRFS_SEND_C_END, + BTRFS_SEND_C_UPDATE_EXTENT, __BTRFS_SEND_C_MAX, }; #define BTRFS_SEND_C_MAX (__BTRFS_SEND_C_MAX - 1) diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index d8982e9601d..db1ba9a2ed6 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -41,13 +41,13 @@ #include #include #include +#include #include "compat.h" #include "delayed-inode.h" #include "ctree.h" #include "disk-io.h" #include "transaction.h" #include "btrfs_inode.h" -#include "ioctl.h" #include "print-tree.h" #include "xattr.h" #include "volumes.h" @@ -63,8 +63,7 @@ static const struct super_operations btrfs_super_ops; static struct file_system_type btrfs_fs_type; -static const char *btrfs_decode_error(struct btrfs_fs_info *fs_info, int errno, - char nbuf[16]) +static const char *btrfs_decode_error(int errno, char nbuf[16]) { char *errstr = NULL; @@ -98,7 +97,7 @@ static void __save_error_info(struct btrfs_fs_info *fs_info) * today we only save the error info into ram. Long term we'll * also send it down to the disk */ - fs_info->fs_state = BTRFS_SUPER_FLAG_ERROR; + set_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state); } static void save_error_info(struct btrfs_fs_info *fs_info) @@ -114,7 +113,7 @@ static void btrfs_handle_error(struct btrfs_fs_info *fs_info) if (sb->s_flags & MS_RDONLY) return; - if (fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR) { + if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) { sb->s_flags |= MS_RDONLY; printk(KERN_INFO "btrfs is forced readonly\n"); /* @@ -142,8 +141,6 @@ void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function, struct super_block *sb = fs_info->sb; char nbuf[16]; const char *errstr; - va_list args; - va_start(args, fmt); /* * Special case: if the error is EROFS, and we're already @@ -152,15 +149,18 @@ void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function, if (errno == -EROFS && (sb->s_flags & MS_RDONLY)) return; - errstr = btrfs_decode_error(fs_info, errno, nbuf); + errstr = btrfs_decode_error(errno, nbuf); if (fmt) { - struct va_format vaf = { - .fmt = fmt, - .va = &args, - }; + struct va_format vaf; + va_list args; + + va_start(args, fmt); + vaf.fmt = fmt; + vaf.va = &args; printk(KERN_CRIT "BTRFS error (device %s) in %s:%d: %s (%pV)\n", sb->s_id, function, line, errstr, &vaf); + va_end(args); } else { printk(KERN_CRIT "BTRFS error (device %s) in %s:%d: %s\n", sb->s_id, function, line, errstr); @@ -171,7 +171,6 @@ void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function, save_error_info(fs_info); btrfs_handle_error(fs_info); } - va_end(args); } static const char * const logtypes[] = { @@ -261,7 +260,7 @@ void __btrfs_abort_transaction(struct btrfs_trans_handle *trans, char nbuf[16]; const char *errstr; - errstr = btrfs_decode_error(root->fs_info, errno, nbuf); + errstr = btrfs_decode_error(errno, nbuf); btrfs_printk(root->fs_info, "%s:%d: Aborting unused transaction(%s).\n", function, line, errstr); @@ -289,8 +288,8 @@ void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function, va_start(args, fmt); vaf.va = &args; - errstr = btrfs_decode_error(fs_info, errno, nbuf); - if (fs_info->mount_opt & BTRFS_MOUNT_PANIC_ON_FATAL_ERROR) + errstr = btrfs_decode_error(errno, nbuf); + if (fs_info && (fs_info->mount_opt & BTRFS_MOUNT_PANIC_ON_FATAL_ERROR)) panic(KERN_CRIT "BTRFS panic (device %s) in %s:%d: %pV (%s)\n", s_id, function, line, &vaf, errstr); @@ -438,6 +437,7 @@ int btrfs_parse_options(struct btrfs_root *root, char *options) case Opt_compress_force: case Opt_compress_force_type: compress_force = true; + /* Fallthrough */ case Opt_compress: case Opt_compress_type: if (token == Opt_compress || @@ -519,7 +519,9 @@ int btrfs_parse_options(struct btrfs_root *root, char *options) case Opt_alloc_start: num = match_strdup(&args[0]); if (num) { + mutex_lock(&info->chunk_mutex); info->alloc_start = memparse(num, NULL); + mutex_unlock(&info->chunk_mutex); kfree(num); printk(KERN_INFO "btrfs: allocations start at %llu\n", @@ -876,7 +878,7 @@ int btrfs_sync_fs(struct super_block *sb, int wait) btrfs_wait_ordered_extents(root, 0); - trans = btrfs_attach_transaction(root); + trans = btrfs_attach_transaction_barrier(root); if (IS_ERR(trans)) { /* no transaction, don't bother */ if (PTR_ERR(trans) == -ENOENT) @@ -1289,7 +1291,9 @@ restore: fs_info->mount_opt = old_opts; fs_info->compress_type = old_compress_type; fs_info->max_inline = old_max_inline; + mutex_lock(&fs_info->chunk_mutex); fs_info->alloc_start = old_alloc_start; + mutex_unlock(&fs_info->chunk_mutex); btrfs_resize_thread_pool(fs_info, old_thread_pool_size, fs_info->thread_pool_size); fs_info->metadata_ratio = old_metadata_ratio; @@ -1559,7 +1563,7 @@ static int btrfs_freeze(struct super_block *sb) struct btrfs_trans_handle *trans; struct btrfs_root *root = btrfs_sb(sb)->tree_root; - trans = btrfs_attach_transaction(root); + trans = btrfs_attach_transaction_barrier(root); if (IS_ERR(trans)) { /* no transaction, don't bother */ if (PTR_ERR(trans) == -ENOENT) @@ -1684,10 +1688,14 @@ static int __init init_btrfs_fs(void) if (err) goto free_delayed_inode; - err = btrfs_interface_init(); + err = btrfs_delayed_ref_init(); if (err) goto free_auto_defrag; + err = btrfs_interface_init(); + if (err) + goto free_delayed_ref; + err = register_filesystem(&btrfs_fs_type); if (err) goto unregister_ioctl; @@ -1699,6 +1707,8 @@ static int __init init_btrfs_fs(void) unregister_ioctl: btrfs_interface_exit(); +free_delayed_ref: + btrfs_delayed_ref_exit(); free_auto_defrag: btrfs_auto_defrag_exit(); free_delayed_inode: @@ -1720,6 +1730,7 @@ free_compress: static void __exit exit_btrfs_fs(void) { btrfs_destroy_cachep(); + btrfs_delayed_ref_exit(); btrfs_auto_defrag_exit(); btrfs_delayed_inode_exit(); ordered_data_exit(); diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c index fc03aa60b68..955204ca044 100644 --- a/fs/btrfs/transaction.c +++ b/fs/btrfs/transaction.c @@ -40,7 +40,6 @@ void put_transaction(struct btrfs_transaction *transaction) if (atomic_dec_and_test(&transaction->use_count)) { BUG_ON(!list_empty(&transaction->list)); WARN_ON(transaction->delayed_refs.root.rb_node); - memset(transaction, 0, sizeof(*transaction)); kmem_cache_free(btrfs_transaction_cachep, transaction); } } @@ -51,6 +50,14 @@ static noinline void switch_commit_root(struct btrfs_root *root) root->commit_root = btrfs_root_node(root); } +static inline int can_join_transaction(struct btrfs_transaction *trans, + int type) +{ + return !(trans->in_commit && + type != TRANS_JOIN && + type != TRANS_JOIN_NOLOCK); +} + /* * either allocate a new transaction or hop into the existing one */ @@ -62,7 +69,7 @@ static noinline int join_transaction(struct btrfs_root *root, int type) spin_lock(&fs_info->trans_lock); loop: /* The file system has been taken offline. No new transactions. */ - if (fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR) { + if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) { spin_unlock(&fs_info->trans_lock); return -EROFS; } @@ -86,6 +93,10 @@ loop: spin_unlock(&fs_info->trans_lock); return cur_trans->aborted; } + if (!can_join_transaction(cur_trans, type)) { + spin_unlock(&fs_info->trans_lock); + return -EBUSY; + } atomic_inc(&cur_trans->use_count); atomic_inc(&cur_trans->num_writers); cur_trans->num_joined++; @@ -114,7 +125,7 @@ loop: kmem_cache_free(btrfs_transaction_cachep, cur_trans); cur_trans = fs_info->running_transaction; goto loop; - } else if (fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR) { + } else if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) { spin_unlock(&fs_info->trans_lock); kmem_cache_free(btrfs_transaction_cachep, cur_trans); return -EROFS; @@ -158,6 +169,7 @@ loop: spin_lock_init(&cur_trans->delayed_refs.lock); INIT_LIST_HEAD(&cur_trans->pending_snapshots); + INIT_LIST_HEAD(&cur_trans->ordered_operations); list_add_tail(&cur_trans->list, &fs_info->trans_list); extent_io_tree_init(&cur_trans->dirty_pages, fs_info->btree_inode->i_mapping); @@ -302,7 +314,7 @@ start_transaction(struct btrfs_root *root, u64 num_items, int type, int ret; u64 qgroup_reserved = 0; - if (root->fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR) + if (test_bit(BTRFS_FS_STATE_ERROR, &root->fs_info->fs_state)) return ERR_PTR(-EROFS); if (current->journal_info) { @@ -360,8 +372,11 @@ again: do { ret = join_transaction(root, type); - if (ret == -EBUSY) + if (ret == -EBUSY) { wait_current_trans(root); + if (unlikely(type == TRANS_ATTACH)) + ret = -ENOENT; + } } while (ret == -EBUSY); if (ret < 0) { @@ -383,9 +398,10 @@ again: h->block_rsv = NULL; h->orig_rsv = NULL; h->aborted = 0; - h->qgroup_reserved = qgroup_reserved; + h->qgroup_reserved = 0; h->delayed_ref_elem.seq = 0; h->type = type; + h->allocating_chunk = false; INIT_LIST_HEAD(&h->qgroup_ref_list); INIT_LIST_HEAD(&h->new_bgs); @@ -401,6 +417,7 @@ again: h->block_rsv = &root->fs_info->trans_block_rsv; h->bytes_reserved = num_bytes; } + h->qgroup_reserved = qgroup_reserved; got_it: btrfs_record_root_in_trans(h, root); @@ -452,11 +469,43 @@ struct btrfs_trans_handle *btrfs_start_ioctl_transaction(struct btrfs_root *root return start_transaction(root, 0, TRANS_USERSPACE, 0); } +/* + * btrfs_attach_transaction() - catch the running transaction + * + * It is used when we want to commit the current the transaction, but + * don't want to start a new one. + * + * Note: If this function return -ENOENT, it just means there is no + * running transaction. But it is possible that the inactive transaction + * is still in the memory, not fully on disk. If you hope there is no + * inactive transaction in the fs when -ENOENT is returned, you should + * invoke + * btrfs_attach_transaction_barrier() + */ struct btrfs_trans_handle *btrfs_attach_transaction(struct btrfs_root *root) { return start_transaction(root, 0, TRANS_ATTACH, 0); } +/* + * btrfs_attach_transaction() - catch the running transaction + * + * It is similar to the above function, the differentia is this one + * will wait for all the inactive transactions until they fully + * complete. + */ +struct btrfs_trans_handle * +btrfs_attach_transaction_barrier(struct btrfs_root *root) +{ + struct btrfs_trans_handle *trans; + + trans = start_transaction(root, 0, TRANS_ATTACH, 0); + if (IS_ERR(trans) && PTR_ERR(trans) == -ENOENT) + btrfs_wait_for_commit(root, 0); + + return trans; +} + /* wait for a transaction commit to be fully complete */ static noinline void wait_for_commit(struct btrfs_root *root, struct btrfs_transaction *commit) @@ -645,12 +694,10 @@ static int __btrfs_end_transaction(struct btrfs_trans_handle *trans, btrfs_run_delayed_iputs(root); if (trans->aborted || - root->fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR) { + test_bit(BTRFS_FS_STATE_ERROR, &root->fs_info->fs_state)) err = -EIO; - } assert_qgroups_uptodate(trans); - memset(trans, 0, sizeof(*trans)); kmem_cache_free(btrfs_trans_handle_cachep, trans); return err; } @@ -961,10 +1008,10 @@ static noinline int commit_fs_roots(struct btrfs_trans_handle *trans, } /* - * defrag a given btree. If cacheonly == 1, this won't read from the disk, - * otherwise every leaf in the btree is read and defragged. + * defrag a given btree. + * Every leaf in the btree is read and defragged. */ -int btrfs_defrag_root(struct btrfs_root *root, int cacheonly) +int btrfs_defrag_root(struct btrfs_root *root) { struct btrfs_fs_info *info = root->fs_info; struct btrfs_trans_handle *trans; @@ -978,7 +1025,7 @@ int btrfs_defrag_root(struct btrfs_root *root, int cacheonly) if (IS_ERR(trans)) return PTR_ERR(trans); - ret = btrfs_defrag_leaves(trans, root, cacheonly); + ret = btrfs_defrag_leaves(trans, root); btrfs_end_transaction(trans, root); btrfs_btree_balance_dirty(info->tree_root); @@ -986,6 +1033,12 @@ int btrfs_defrag_root(struct btrfs_root *root, int cacheonly) if (btrfs_fs_closing(root->fs_info) || ret != -EAGAIN) break; + + if (btrfs_defrag_cancelled(root->fs_info)) { + printk(KERN_DEBUG "btrfs: defrag_root cancelled\n"); + ret = -EAGAIN; + break; + } } root->defrag_running = 0; return ret; @@ -1307,13 +1360,13 @@ static void wait_current_trans_commit_start_and_unblock(struct btrfs_root *root, struct btrfs_async_commit { struct btrfs_trans_handle *newtrans; struct btrfs_root *root; - struct delayed_work work; + struct work_struct work; }; static void do_async_commit(struct work_struct *work) { struct btrfs_async_commit *ac = - container_of(work, struct btrfs_async_commit, work.work); + container_of(work, struct btrfs_async_commit, work); /* * We've got freeze protection passed with the transaction. @@ -1341,7 +1394,7 @@ int btrfs_commit_transaction_async(struct btrfs_trans_handle *trans, if (!ac) return -ENOMEM; - INIT_DELAYED_WORK(&ac->work, do_async_commit); + INIT_WORK(&ac->work, do_async_commit); ac->root = root; ac->newtrans = btrfs_join_transaction(root); if (IS_ERR(ac->newtrans)) { @@ -1365,7 +1418,7 @@ int btrfs_commit_transaction_async(struct btrfs_trans_handle *trans, &root->fs_info->sb->s_writers.lock_map[SB_FREEZE_FS-1], 1, _THIS_IP_); - schedule_delayed_work(&ac->work, 0); + schedule_work(&ac->work); /* wait for transaction to start and unblock */ if (wait_for_unblock) @@ -1428,7 +1481,9 @@ static int btrfs_flush_all_pending_stuffs(struct btrfs_trans_handle *trans, } if (flush_on_commit || snap_pending) { - btrfs_start_delalloc_inodes(root, 1); + ret = btrfs_start_delalloc_inodes(root, 1); + if (ret) + return ret; btrfs_wait_ordered_extents(root, 1); } @@ -1450,9 +1505,9 @@ static int btrfs_flush_all_pending_stuffs(struct btrfs_trans_handle *trans, * it here and no for sure that nothing new will be added * to the list */ - btrfs_run_ordered_operations(root, 1); + ret = btrfs_run_ordered_operations(trans, root, 1); - return 0; + return ret; } /* @@ -1473,27 +1528,35 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans, int should_grow = 0; unsigned long now = get_seconds(); - ret = btrfs_run_ordered_operations(root, 0); + ret = btrfs_run_ordered_operations(trans, root, 0); if (ret) { btrfs_abort_transaction(trans, root, ret); - goto cleanup_transaction; + btrfs_end_transaction(trans, root); + return ret; } /* Stop the commit early if ->aborted is set */ if (unlikely(ACCESS_ONCE(cur_trans->aborted))) { ret = cur_trans->aborted; - goto cleanup_transaction; + btrfs_end_transaction(trans, root); + return ret; } /* make a pass through all the delayed refs we have so far * any runnings procs may add more while we are here */ ret = btrfs_run_delayed_refs(trans, root, 0); - if (ret) - goto cleanup_transaction; + if (ret) { + btrfs_end_transaction(trans, root); + return ret; + } btrfs_trans_release_metadata(trans, root); trans->block_rsv = NULL; + if (trans->qgroup_reserved) { + btrfs_qgroup_free(root, trans->qgroup_reserved); + trans->qgroup_reserved = 0; + } cur_trans = trans->transaction; @@ -1507,8 +1570,10 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans, btrfs_create_pending_block_groups(trans, root); ret = btrfs_run_delayed_refs(trans, root, 0); - if (ret) - goto cleanup_transaction; + if (ret) { + btrfs_end_transaction(trans, root); + return ret; + } spin_lock(&cur_trans->commit_lock); if (cur_trans->in_commit) { @@ -1772,6 +1837,10 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans, cleanup_transaction: btrfs_trans_release_metadata(trans, root); trans->block_rsv = NULL; + if (trans->qgroup_reserved) { + btrfs_qgroup_free(root, trans->qgroup_reserved); + trans->qgroup_reserved = 0; + } btrfs_printk(root->fs_info, "Skipping commit of aborted transaction.\n"); // WARN_ON(1); if (current->journal_info == trans) diff --git a/fs/btrfs/transaction.h b/fs/btrfs/transaction.h index 0e8aa1e6c28..5afd7b1dcea 100644 --- a/fs/btrfs/transaction.h +++ b/fs/btrfs/transaction.h @@ -43,6 +43,7 @@ struct btrfs_transaction { wait_queue_head_t writer_wait; wait_queue_head_t commit_wait; struct list_head pending_snapshots; + struct list_head ordered_operations; struct btrfs_delayed_ref_root delayed_refs; int aborted; }; @@ -68,6 +69,7 @@ struct btrfs_trans_handle { struct btrfs_block_rsv *orig_rsv; short aborted; short adding_csums; + bool allocating_chunk; enum btrfs_trans_type type; /* * this root is only needed to validate that the root passed to @@ -110,13 +112,15 @@ struct btrfs_trans_handle *btrfs_start_transaction_lflush( struct btrfs_trans_handle *btrfs_join_transaction(struct btrfs_root *root); struct btrfs_trans_handle *btrfs_join_transaction_nolock(struct btrfs_root *root); struct btrfs_trans_handle *btrfs_attach_transaction(struct btrfs_root *root); +struct btrfs_trans_handle *btrfs_attach_transaction_barrier( + struct btrfs_root *root); struct btrfs_trans_handle *btrfs_start_ioctl_transaction(struct btrfs_root *root); int btrfs_wait_for_commit(struct btrfs_root *root, u64 transid); int btrfs_write_and_wait_transaction(struct btrfs_trans_handle *trans, struct btrfs_root *root); int btrfs_add_dead_root(struct btrfs_root *root); -int btrfs_defrag_root(struct btrfs_root *root, int cacheonly); +int btrfs_defrag_root(struct btrfs_root *root); int btrfs_clean_old_snapshots(struct btrfs_root *root); int btrfs_commit_transaction(struct btrfs_trans_handle *trans, struct btrfs_root *root); diff --git a/fs/btrfs/tree-defrag.c b/fs/btrfs/tree-defrag.c index 3b580ee8ab1..94e05c1f118 100644 --- a/fs/btrfs/tree-defrag.c +++ b/fs/btrfs/tree-defrag.c @@ -23,13 +23,14 @@ #include "transaction.h" #include "locking.h" -/* defrag all the leaves in a given btree. If cache_only == 1, don't read - * things from disk, otherwise read all the leaves and try to get key order to +/* + * Defrag all the leaves in a given btree. + * Read all the leaves and try to get key order to * better reflect disk order */ int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, - struct btrfs_root *root, int cache_only) + struct btrfs_root *root) { struct btrfs_path *path = NULL; struct btrfs_key key; @@ -41,9 +42,6 @@ int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, u64 last_ret = 0; u64 min_trans = 0; - if (cache_only) - goto out; - if (root->fs_info->extent_root == root) { /* * there's recursion here right now in the tree locking, @@ -86,11 +84,8 @@ int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, } path->keep_locks = 1; - if (cache_only) - min_trans = root->defrag_trans_start; - ret = btrfs_search_forward(root, &key, NULL, path, - cache_only, min_trans); + ret = btrfs_search_forward(root, &key, NULL, path, min_trans); if (ret < 0) goto out; if (ret > 0) { @@ -109,11 +104,11 @@ int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, goto out; } path->slots[1] = btrfs_header_nritems(path->nodes[1]); - next_key_ret = btrfs_find_next_key(root, path, &key, 1, cache_only, + next_key_ret = btrfs_find_next_key(root, path, &key, 1, min_trans); ret = btrfs_realloc_node(trans, root, path->nodes[1], 0, - cache_only, &last_ret, + &last_ret, &root->defrag_progress); if (ret) { WARN_ON(ret == -EAGAIN); diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c index 9027bb1e746..1a79087c457 100644 --- a/fs/btrfs/tree-log.c +++ b/fs/btrfs/tree-log.c @@ -278,8 +278,7 @@ static int process_one_buffer(struct btrfs_root *log, struct walk_control *wc, u64 gen) { if (wc->pin) - btrfs_pin_extent_for_log_replay(wc->trans, - log->fs_info->extent_root, + btrfs_pin_extent_for_log_replay(log->fs_info->extent_root, eb->start, eb->len); if (btrfs_buffer_uptodate(eb, gen, 0)) { @@ -2281,6 +2280,7 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans, unsigned long log_transid = 0; mutex_lock(&root->log_mutex); + log_transid = root->log_transid; index1 = root->log_transid % 2; if (atomic_read(&root->log_commit[index1])) { wait_log_commit(trans, root, root->log_transid); @@ -2308,11 +2308,11 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans, /* bail out if we need to do a full commit */ if (root->fs_info->last_trans_log_full_commit == trans->transid) { ret = -EAGAIN; + btrfs_free_logged_extents(log, log_transid); mutex_unlock(&root->log_mutex); goto out; } - log_transid = root->log_transid; if (log_transid % 2 == 0) mark = EXTENT_DIRTY; else @@ -2324,6 +2324,7 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans, ret = btrfs_write_marked_extents(log, &log->dirty_log_pages, mark); if (ret) { btrfs_abort_transaction(trans, root, ret); + btrfs_free_logged_extents(log, log_transid); mutex_unlock(&root->log_mutex); goto out; } @@ -2363,6 +2364,7 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans, } root->fs_info->last_trans_log_full_commit = trans->transid; btrfs_wait_marked_extents(log, &log->dirty_log_pages, mark); + btrfs_free_logged_extents(log, log_transid); mutex_unlock(&log_root_tree->log_mutex); ret = -EAGAIN; goto out; @@ -2373,6 +2375,7 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans, btrfs_wait_marked_extents(log, &log->dirty_log_pages, mark); wait_log_commit(trans, log_root_tree, log_root_tree->log_transid); + btrfs_free_logged_extents(log, log_transid); mutex_unlock(&log_root_tree->log_mutex); ret = 0; goto out; @@ -2392,6 +2395,7 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans, */ if (root->fs_info->last_trans_log_full_commit == trans->transid) { btrfs_wait_marked_extents(log, &log->dirty_log_pages, mark); + btrfs_free_logged_extents(log, log_transid); mutex_unlock(&log_root_tree->log_mutex); ret = -EAGAIN; goto out_wake_log_root; @@ -2402,10 +2406,12 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans, EXTENT_DIRTY | EXTENT_NEW); if (ret) { btrfs_abort_transaction(trans, root, ret); + btrfs_free_logged_extents(log, log_transid); mutex_unlock(&log_root_tree->log_mutex); goto out_wake_log_root; } btrfs_wait_marked_extents(log, &log->dirty_log_pages, mark); + btrfs_wait_logged_extents(log, log_transid); btrfs_set_super_log_root(root->fs_info->super_for_commit, log_root_tree->node->start); @@ -2475,6 +2481,14 @@ static void free_log_tree(struct btrfs_trans_handle *trans, EXTENT_DIRTY | EXTENT_NEW, GFP_NOFS); } + /* + * We may have short-circuited the log tree with the full commit logic + * and left ordered extents on our list, so clear these out to keep us + * from leaking inodes and memory. + */ + btrfs_free_logged_extents(log, 0); + btrfs_free_logged_extents(log, 1); + free_extent_buffer(log->node); kfree(log); } @@ -2724,7 +2738,7 @@ static noinline int log_dir_items(struct btrfs_trans_handle *trans, path->keep_locks = 1; ret = btrfs_search_forward(root, &min_key, &max_key, - path, 0, trans->transid); + path, trans->transid); /* * we didn't find anything from this transaction, see if there @@ -3271,14 +3285,18 @@ static int log_one_extent(struct btrfs_trans_handle *trans, struct btrfs_root *log = root->log_root; struct btrfs_file_extent_item *fi; struct extent_buffer *leaf; + struct btrfs_ordered_extent *ordered; struct list_head ordered_sums; struct btrfs_map_token token; struct btrfs_key key; - u64 csum_offset = em->mod_start - em->start; - u64 csum_len = em->mod_len; + u64 mod_start = em->mod_start; + u64 mod_len = em->mod_len; + u64 csum_offset; + u64 csum_len; u64 extent_offset = em->start - em->orig_start; u64 block_len; int ret; + int index = log->log_transid % 2; bool skip_csum = BTRFS_I(inode)->flags & BTRFS_INODE_NODATASUM; INIT_LIST_HEAD(&ordered_sums); @@ -3362,6 +3380,92 @@ static int log_one_extent(struct btrfs_trans_handle *trans, csum_len = block_len; } + /* + * First check and see if our csums are on our outstanding ordered + * extents. + */ +again: + spin_lock_irq(&log->log_extents_lock[index]); + list_for_each_entry(ordered, &log->logged_list[index], log_list) { + struct btrfs_ordered_sum *sum; + + if (!mod_len) + break; + + if (ordered->inode != inode) + continue; + + if (ordered->file_offset + ordered->len <= mod_start || + mod_start + mod_len <= ordered->file_offset) + continue; + + /* + * We are going to copy all the csums on this ordered extent, so + * go ahead and adjust mod_start and mod_len in case this + * ordered extent has already been logged. + */ + if (ordered->file_offset > mod_start) { + if (ordered->file_offset + ordered->len >= + mod_start + mod_len) + mod_len = ordered->file_offset - mod_start; + /* + * If we have this case + * + * |--------- logged extent ---------| + * |----- ordered extent ----| + * + * Just don't mess with mod_start and mod_len, we'll + * just end up logging more csums than we need and it + * will be ok. + */ + } else { + if (ordered->file_offset + ordered->len < + mod_start + mod_len) { + mod_len = (mod_start + mod_len) - + (ordered->file_offset + ordered->len); + mod_start = ordered->file_offset + + ordered->len; + } else { + mod_len = 0; + } + } + + /* + * To keep us from looping for the above case of an ordered + * extent that falls inside of the logged extent. + */ + if (test_and_set_bit(BTRFS_ORDERED_LOGGED_CSUM, + &ordered->flags)) + continue; + atomic_inc(&ordered->refs); + spin_unlock_irq(&log->log_extents_lock[index]); + /* + * we've dropped the lock, we must either break or + * start over after this. + */ + + wait_event(ordered->wait, ordered->csum_bytes_left == 0); + + list_for_each_entry(sum, &ordered->list, list) { + ret = btrfs_csum_file_blocks(trans, log, sum); + if (ret) { + btrfs_put_ordered_extent(ordered); + goto unlocked; + } + } + btrfs_put_ordered_extent(ordered); + goto again; + + } + spin_unlock_irq(&log->log_extents_lock[index]); +unlocked: + + if (!mod_len || ret) + return ret; + + csum_offset = mod_start - em->start; + csum_len = mod_len; + /* block start is already adjusted for the file extent offset. */ ret = btrfs_lookup_csums_range(log->fs_info->csum_root, em->block_start + csum_offset, @@ -3393,6 +3497,7 @@ static int btrfs_log_changed_extents(struct btrfs_trans_handle *trans, struct extent_map_tree *tree = &BTRFS_I(inode)->extent_tree; u64 test_gen; int ret = 0; + int num = 0; INIT_LIST_HEAD(&extents); @@ -3401,16 +3506,31 @@ static int btrfs_log_changed_extents(struct btrfs_trans_handle *trans, list_for_each_entry_safe(em, n, &tree->modified_extents, list) { list_del_init(&em->list); + + /* + * Just an arbitrary number, this can be really CPU intensive + * once we start getting a lot of extents, and really once we + * have a bunch of extents we just want to commit since it will + * be faster. + */ + if (++num > 32768) { + list_del_init(&tree->modified_extents); + ret = -EFBIG; + goto process; + } + if (em->generation <= test_gen) continue; /* Need a ref to keep it from getting evicted from cache */ atomic_inc(&em->refs); set_bit(EXTENT_FLAG_LOGGING, &em->flags); list_add_tail(&em->list, &extents); + num++; } list_sort(NULL, &extents, extent_cmp); +process: while (!list_empty(&extents)) { em = list_entry(extents.next, struct extent_map, list); @@ -3513,6 +3633,8 @@ static int btrfs_log_inode(struct btrfs_trans_handle *trans, mutex_lock(&BTRFS_I(inode)->log_mutex); + btrfs_get_logged_extents(log, inode); + /* * a brute force approach to making sure we get the most uptodate * copies of everything. @@ -3558,7 +3680,7 @@ static int btrfs_log_inode(struct btrfs_trans_handle *trans, while (1) { ins_nr = 0; ret = btrfs_search_forward(root, &min_key, &max_key, - path, 0, trans->transid); + path, trans->transid); if (ret != 0) break; again: @@ -3656,6 +3778,8 @@ log_extents: BTRFS_I(inode)->logged_trans = trans->transid; BTRFS_I(inode)->last_log_commit = BTRFS_I(inode)->last_sub_trans; out_unlock: + if (err) + btrfs_free_logged_extents(log, log->log_transid); mutex_unlock(&BTRFS_I(inode)->log_mutex); btrfs_free_path(path); @@ -3822,7 +3946,6 @@ int btrfs_log_inode_parent(struct btrfs_trans_handle *trans, end_trans: dput(old_parent); if (ret < 0) { - WARN_ON(ret != -ENOSPC); root->fs_info->last_trans_log_full_commit = trans->transid; ret = 1; } diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 5cbb7f4b167..72b1cf1b2b5 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -792,26 +792,76 @@ int btrfs_open_devices(struct btrfs_fs_devices *fs_devices, return ret; } +/* + * Look for a btrfs signature on a device. This may be called out of the mount path + * and we are not allowed to call set_blocksize during the scan. The superblock + * is read via pagecache + */ int btrfs_scan_one_device(const char *path, fmode_t flags, void *holder, struct btrfs_fs_devices **fs_devices_ret) { struct btrfs_super_block *disk_super; struct block_device *bdev; - struct buffer_head *bh; - int ret; + struct page *page; + void *p; + int ret = -EINVAL; u64 devid; u64 transid; u64 total_devices; + u64 bytenr; + pgoff_t index; + /* + * we would like to check all the supers, but that would make + * a btrfs mount succeed after a mkfs from a different FS. + * So, we need to add a special mount option to scan for + * later supers, using BTRFS_SUPER_MIRROR_MAX instead + */ + bytenr = btrfs_sb_offset(0); flags |= FMODE_EXCL; mutex_lock(&uuid_mutex); - ret = btrfs_get_bdev_and_sb(path, flags, holder, 0, &bdev, &bh); - if (ret) + + bdev = blkdev_get_by_path(path, flags, holder); + + if (IS_ERR(bdev)) { + ret = PTR_ERR(bdev); + printk(KERN_INFO "btrfs: open %s failed\n", path); goto error; - disk_super = (struct btrfs_super_block *)bh->b_data; + } + + /* make sure our super fits in the device */ + if (bytenr + PAGE_CACHE_SIZE >= i_size_read(bdev->bd_inode)) + goto error_bdev_put; + + /* make sure our super fits in the page */ + if (sizeof(*disk_super) > PAGE_CACHE_SIZE) + goto error_bdev_put; + + /* make sure our super doesn't straddle pages on disk */ + index = bytenr >> PAGE_CACHE_SHIFT; + if ((bytenr + sizeof(*disk_super) - 1) >> PAGE_CACHE_SHIFT != index) + goto error_bdev_put; + + /* pull in the page with our super */ + page = read_cache_page_gfp(bdev->bd_inode->i_mapping, + index, GFP_NOFS); + + if (IS_ERR_OR_NULL(page)) + goto error_bdev_put; + + p = kmap(page); + + /* align our pointer to the offset of the super block */ + disk_super = p + (bytenr & ~PAGE_CACHE_MASK); + + if (btrfs_super_bytenr(disk_super) != bytenr || + disk_super->magic != cpu_to_le64(BTRFS_MAGIC)) + goto error_unmap; + devid = btrfs_stack_device_id(&disk_super->dev_item); transid = btrfs_super_generation(disk_super); total_devices = btrfs_super_num_devices(disk_super); + if (disk_super->label[0]) { if (disk_super->label[BTRFS_LABEL_SIZE - 1]) disk_super->label[BTRFS_LABEL_SIZE - 1] = '\0'; @@ -819,12 +869,19 @@ int btrfs_scan_one_device(const char *path, fmode_t flags, void *holder, } else { printk(KERN_INFO "device fsid %pU ", disk_super->fsid); } + printk(KERN_CONT "devid %llu transid %llu %s\n", (unsigned long long)devid, (unsigned long long)transid, path); + ret = device_list_add(path, disk_super, devid, fs_devices_ret); if (!ret && fs_devices_ret) (*fs_devices_ret)->total_devices = total_devices; - brelse(bh); + +error_unmap: + kunmap(page); + page_cache_release(page); + +error_bdev_put: blkdev_put(bdev, flags); error: mutex_unlock(&uuid_mutex); @@ -1372,14 +1429,19 @@ int btrfs_rm_device(struct btrfs_root *root, char *device_path) u64 devid; u64 num_devices; u8 *dev_uuid; + unsigned seq; int ret = 0; bool clear_super = false; mutex_lock(&uuid_mutex); - all_avail = root->fs_info->avail_data_alloc_bits | - root->fs_info->avail_system_alloc_bits | - root->fs_info->avail_metadata_alloc_bits; + do { + seq = read_seqbegin(&root->fs_info->profiles_lock); + + all_avail = root->fs_info->avail_data_alloc_bits | + root->fs_info->avail_system_alloc_bits | + root->fs_info->avail_metadata_alloc_bits; + } while (read_seqretry(&root->fs_info->profiles_lock, seq)); num_devices = root->fs_info->fs_devices->num_devices; btrfs_dev_replace_lock(&root->fs_info->dev_replace); @@ -2616,7 +2678,7 @@ static int chunk_usage_filter(struct btrfs_fs_info *fs_info, u64 chunk_offset, chunk_used = btrfs_block_group_used(&cache->item); if (bargs->usage == 0) - user_thresh = 0; + user_thresh = 1; else if (bargs->usage > 100) user_thresh = cache->key.offset; else @@ -2985,6 +3047,7 @@ int btrfs_balance(struct btrfs_balance_control *bctl, int mixed = 0; int ret; u64 num_devices; + unsigned seq; if (btrfs_fs_closing(fs_info) || atomic_read(&fs_info->balance_pause_req) || @@ -3068,22 +3131,26 @@ int btrfs_balance(struct btrfs_balance_control *bctl, /* allow to reduce meta or sys integrity only if force set */ allowed = BTRFS_BLOCK_GROUP_DUP | BTRFS_BLOCK_GROUP_RAID1 | BTRFS_BLOCK_GROUP_RAID10; - if (((bctl->sys.flags & BTRFS_BALANCE_ARGS_CONVERT) && - (fs_info->avail_system_alloc_bits & allowed) && - !(bctl->sys.target & allowed)) || - ((bctl->meta.flags & BTRFS_BALANCE_ARGS_CONVERT) && - (fs_info->avail_metadata_alloc_bits & allowed) && - !(bctl->meta.target & allowed))) { - if (bctl->flags & BTRFS_BALANCE_FORCE) { - printk(KERN_INFO "btrfs: force reducing metadata " - "integrity\n"); - } else { - printk(KERN_ERR "btrfs: balance will reduce metadata " - "integrity, use force if you want this\n"); - ret = -EINVAL; - goto out; + do { + seq = read_seqbegin(&fs_info->profiles_lock); + + if (((bctl->sys.flags & BTRFS_BALANCE_ARGS_CONVERT) && + (fs_info->avail_system_alloc_bits & allowed) && + !(bctl->sys.target & allowed)) || + ((bctl->meta.flags & BTRFS_BALANCE_ARGS_CONVERT) && + (fs_info->avail_metadata_alloc_bits & allowed) && + !(bctl->meta.target & allowed))) { + if (bctl->flags & BTRFS_BALANCE_FORCE) { + printk(KERN_INFO "btrfs: force reducing metadata " + "integrity\n"); + } else { + printk(KERN_ERR "btrfs: balance will reduce metadata " + "integrity, use force if you want this\n"); + ret = -EINVAL; + goto out; + } } - } + } while (read_seqretry(&fs_info->profiles_lock, seq)); if (bctl->sys.flags & BTRFS_BALANCE_ARGS_CONVERT) { int num_tolerated_disk_barrier_failures; @@ -3127,6 +3194,11 @@ int btrfs_balance(struct btrfs_balance_control *bctl, mutex_lock(&fs_info->balance_mutex); atomic_dec(&fs_info->balance_running); + if (bctl->sys.flags & BTRFS_BALANCE_ARGS_CONVERT) { + fs_info->num_tolerated_disk_barrier_failures = + btrfs_calc_num_tolerated_disk_barrier_failures(fs_info); + } + if (bargs) { memset(bargs, 0, sizeof(*bargs)); update_ioctl_balance_args(fs_info, 0, bargs); @@ -3137,11 +3209,6 @@ int btrfs_balance(struct btrfs_balance_control *bctl, __cancel_balance(fs_info); } - if (bctl->sys.flags & BTRFS_BALANCE_ARGS_CONVERT) { - fs_info->num_tolerated_disk_barrier_failures = - btrfs_calc_num_tolerated_disk_barrier_failures(fs_info); - } - wake_up(&fs_info->balance_wait_q); return ret; @@ -3504,13 +3571,48 @@ static int btrfs_cmp_device_info(const void *a, const void *b) } struct btrfs_raid_attr btrfs_raid_array[BTRFS_NR_RAID_TYPES] = { - { 2, 1, 0, 4, 2, 2 /* raid10 */ }, - { 1, 1, 2, 2, 2, 2 /* raid1 */ }, - { 1, 2, 1, 1, 1, 2 /* dup */ }, - { 1, 1, 0, 2, 1, 1 /* raid0 */ }, - { 1, 1, 1, 1, 1, 1 /* single */ }, + [BTRFS_RAID_RAID10] = { + .sub_stripes = 2, + .dev_stripes = 1, + .devs_max = 0, /* 0 == as many as possible */ + .devs_min = 4, + .devs_increment = 2, + .ncopies = 2, + }, + [BTRFS_RAID_RAID1] = { + .sub_stripes = 1, + .dev_stripes = 1, + .devs_max = 2, + .devs_min = 2, + .devs_increment = 2, + .ncopies = 2, + }, + [BTRFS_RAID_DUP] = { + .sub_stripes = 1, + .dev_stripes = 2, + .devs_max = 1, + .devs_min = 1, + .devs_increment = 1, + .ncopies = 2, + }, + [BTRFS_RAID_RAID0] = { + .sub_stripes = 1, + .dev_stripes = 1, + .devs_max = 0, + .devs_min = 2, + .devs_increment = 1, + .ncopies = 1, + }, + [BTRFS_RAID_SINGLE] = { + .sub_stripes = 1, + .dev_stripes = 1, + .devs_max = 1, + .devs_min = 1, + .devs_increment = 1, + .ncopies = 1, + }, }; - + static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans, struct btrfs_root *extent_root, struct map_lookup **map_ret, @@ -3631,12 +3733,16 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans, if (max_avail < BTRFS_STRIPE_LEN * dev_stripes) continue; + if (ndevs == fs_devices->rw_devices) { + WARN(1, "%s: found more than %llu devices\n", + __func__, fs_devices->rw_devices); + break; + } devices_info[ndevs].dev_offset = dev_offset; devices_info[ndevs].max_avail = max_avail; devices_info[ndevs].total_avail = total_avail; devices_info[ndevs].dev = device; ++ndevs; - WARN_ON(ndevs > fs_devices->rw_devices); } /* @@ -3718,15 +3824,10 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans, write_lock(&em_tree->lock); ret = add_extent_mapping(em_tree, em); write_unlock(&em_tree->lock); - free_extent_map(em); - if (ret) - goto error; - - ret = btrfs_make_block_group(trans, extent_root, 0, type, - BTRFS_FIRST_CHUNK_TREE_OBJECTID, - start, num_bytes); - if (ret) + if (ret) { + free_extent_map(em); goto error; + } for (i = 0; i < map->num_stripes; ++i) { struct btrfs_device *device; @@ -3739,15 +3840,42 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans, info->chunk_root->root_key.objectid, BTRFS_FIRST_CHUNK_TREE_OBJECTID, start, dev_offset, stripe_size); - if (ret) { - btrfs_abort_transaction(trans, extent_root, ret); - goto error; - } + if (ret) + goto error_dev_extent; } + ret = btrfs_make_block_group(trans, extent_root, 0, type, + BTRFS_FIRST_CHUNK_TREE_OBJECTID, + start, num_bytes); + if (ret) { + i = map->num_stripes - 1; + goto error_dev_extent; + } + + free_extent_map(em); kfree(devices_info); return 0; +error_dev_extent: + for (; i >= 0; i--) { + struct btrfs_device *device; + int err; + + device = map->stripes[i].dev; + err = btrfs_free_dev_extent(trans, device, start); + if (err) { + btrfs_abort_transaction(trans, extent_root, err); + break; + } + } + write_lock(&em_tree->lock); + remove_extent_mapping(em_tree, em); + write_unlock(&em_tree->lock); + + /* One for our allocation */ + free_extent_map(em); + /* One for the tree reference */ + free_extent_map(em); error: kfree(map); kfree(devices_info); @@ -3887,10 +4015,7 @@ static noinline int init_first_rw_device(struct btrfs_trans_handle *trans, if (ret) return ret; - alloc_profile = BTRFS_BLOCK_GROUP_METADATA | - fs_info->avail_metadata_alloc_bits; - alloc_profile = btrfs_reduce_alloc_profile(root, alloc_profile); - + alloc_profile = btrfs_get_alloc_profile(extent_root, 0); ret = __btrfs_alloc_chunk(trans, extent_root, &map, &chunk_size, &stripe_size, chunk_offset, alloc_profile); if (ret) @@ -3898,10 +4023,7 @@ static noinline int init_first_rw_device(struct btrfs_trans_handle *trans, sys_chunk_offset = chunk_offset + chunk_size; - alloc_profile = BTRFS_BLOCK_GROUP_SYSTEM | - fs_info->avail_system_alloc_bits; - alloc_profile = btrfs_reduce_alloc_profile(root, alloc_profile); - + alloc_profile = btrfs_get_alloc_profile(fs_info->chunk_root, 0); ret = __btrfs_alloc_chunk(trans, extent_root, &sys_map, &sys_chunk_size, &sys_stripe_size, sys_chunk_offset, alloc_profile); diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h index d3c3939ac75..12bb84166a5 100644 --- a/fs/btrfs/volumes.h +++ b/fs/btrfs/volumes.h @@ -21,8 +21,8 @@ #include #include +#include #include "async-thread.h" -#include "ioctl.h" #define BTRFS_STRIPE_LEN (64 * 1024) diff --git a/include/linux/btrfs.h b/include/linux/btrfs.h new file mode 100644 index 00000000000..22d799147db --- /dev/null +++ b/include/linux/btrfs.h @@ -0,0 +1,6 @@ +#ifndef _LINUX_BTRFS_H +#define _LINUX_BTRFS_H + +#include + +#endif /* _LINUX_BTRFS_H */ diff --git a/include/uapi/linux/Kbuild b/include/uapi/linux/Kbuild index 4e67194fd2c..5c8a1d25e21 100644 --- a/include/uapi/linux/Kbuild +++ b/include/uapi/linux/Kbuild @@ -68,6 +68,7 @@ header-y += blkpg.h header-y += blktrace_api.h header-y += bpqether.h header-y += bsg.h +header-y += btrfs.h header-y += can.h header-y += capability.h header-y += capi.h diff --git a/fs/btrfs/ioctl.h b/include/uapi/linux/btrfs.h similarity index 96% rename from fs/btrfs/ioctl.h rename to include/uapi/linux/btrfs.h index dabca9cc8c2..fa3a5f9338f 100644 --- a/fs/btrfs/ioctl.h +++ b/include/uapi/linux/btrfs.h @@ -16,8 +16,9 @@ * Boston, MA 021110-1307, USA. */ -#ifndef __IOCTL_ -#define __IOCTL_ +#ifndef _UAPI_LINUX_BTRFS_H +#define _UAPI_LINUX_BTRFS_H +#include #include #define BTRFS_IOCTL_MAGIC 0x94 @@ -406,6 +407,13 @@ struct btrfs_ioctl_received_subvol_args { __u64 reserved[16]; /* in */ }; +/* + * Caller doesn't want file data in the send stream, even if the + * search of clone sources doesn't find an extent. UPDATE_EXTENT + * commands will be sent instead of WRITE commands. + */ +#define BTRFS_SEND_FLAG_NO_FILE_DATA 0x1 + struct btrfs_ioctl_send_args { __s64 send_fd; /* in */ __u64 clone_sources_count; /* in */ @@ -494,9 +502,13 @@ struct btrfs_ioctl_send_args { struct btrfs_ioctl_qgroup_create_args) #define BTRFS_IOC_QGROUP_LIMIT _IOR(BTRFS_IOCTL_MAGIC, 43, \ struct btrfs_ioctl_qgroup_limit_args) +#define BTRFS_IOC_GET_FSLABEL _IOR(BTRFS_IOCTL_MAGIC, 49, \ + char[BTRFS_LABEL_SIZE]) +#define BTRFS_IOC_SET_FSLABEL _IOW(BTRFS_IOCTL_MAGIC, 50, \ + char[BTRFS_LABEL_SIZE]) #define BTRFS_IOC_GET_DEV_STATS _IOWR(BTRFS_IOCTL_MAGIC, 52, \ struct btrfs_ioctl_get_dev_stats) #define BTRFS_IOC_DEV_REPLACE _IOWR(BTRFS_IOCTL_MAGIC, 53, \ struct btrfs_ioctl_dev_replace_args) -#endif +#endif /* _UAPI_LINUX_BTRFS_H */