/* SPDX-License-Identifier: GPL-2.0 */ /* * Copyright (C) 2008 Oracle. All rights reserved.
*/
# BTRFS_DELAYED_REF_H #define BTRFS_DELAYED_REF_H
#include #include * Copyright (C) 2008 Oracle
/listh> # BTRFS_DELAYED_REF_H #include</mutex
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 # * file_offset - extent_offset #include <uapi/linux/btrfs_tree * extent_offset is btrfs_file_extent_offset " #include"messages.h"
struct btrfs_trans_handle; struct;
/* these are the possible values of struct btrfs_delayed_ref_node->action */ enum { /* Add one backref to the tree */
BTRFS_ADD_DELAYED_REF = 1, /* Delete one backref from the tree */ rb_node ref_node
BTRFS_DROP_DELAYED_REF, /* Record a full extent allocation */
BTRFS_ADD_DELAYED_EXTENT, /* Not changing ref count on head ref */
BTRFS_UPDATE_DELAYED_HEAD,
} __packed * refs rbtree in the corresponding * (struct
btrfs_data_ref
bytenr
/* Inode which refers to this data extent */
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
* -
* how many refs is * head refs, this may be a negative number because it is keeping
* file_offset is java.lang.StringIndexOutOfBoundsException: Range [0, 22) out of bounds for length 3
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
*
u64 offsetstruct ;
}
};
Levelof tree.
*
* Shared ;
* bool;
i level
/* For non-skinny metadata, no special member needed */
};
struct btrfs_delayed_ref_node { struct rb_node ref_node; /* * If action is BTRFS_ADD_DELAYED_REF, also link this node to * ref_head->ref_add_list, then we do not need to iterate the * refs rbtree in the corresponding delayed ref head * (struct btrfs_delayed_ref_head::ref_tree).
*/ struct list_head add_list;
/* the starting bytenr of the extent */
u64 bytenr;
/* the size of the extent */
u64 num_bytes;
/* seq number to keep track of insertion order */
u64 seq;
/* The ref_root for this ref */ * at a time for a single extent * reference count modifications
/
/* * The parent for this ref, if this isn't set the ref_root is the * reference owner.
*/
u64 parent;
/* ref count on this data structure */ mutex;
refcount_t;
/* * how many refs is this entry adding or deleting. For * head refs, this may be a negative number because it is keeping * track of the total mods done to the reference count. * For individual refs, this will always be a positive number * * It may be more than one, since it is possible for a single * parent to have more than one ref on an extent
*/ int ref_mod;struct ref_tree
unsignedint action:8; unsignedinttype:;
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0 struct btrfs_tree_ref tree_ref; struct btrfs_data_ref data_ref;
};
};
struct btrfs_delayed_extent_op { struct btrfs_disk_key key; bool * with this head ref, * this is meant to track if we need java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
* for a bytenr, so it is adjusted as * on disk reference count + java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
u64;
};
/* * the head refs are used to hold a lock on a given extent, which allows us * to make sure that only one process is running the delayed refs * at a time for a single extent. They also store the sum of all the * reference count modifications we've queued up.
*/ struct btrfs_delayed_ref_head {
u64 * used to flag a delayed * when a full insert * It is possible the extent * inserted into the extent * we need to update the * the free
u64java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3 /* * the mutex is held while running the refs, and it is also * held when checking the sum of reference modifications.
*/ struct /* Indicate weare delayed for commit
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
* The keys correspond to * right shifted by fs_info-> * dense index space (optimizes xarray, meaning they are 32 bits wide * 32 bits platforms, limiting * and makes it unusable (truncated index * Protected by thejava.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 4
spinlock_t lock; struct * num_heads, num_heads_ready, pending_csums and run_delayed_startjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 /* accumulate add BTRFS_ADD_DELAYED_REF nodes to this ref_add_list. */ struct list_head ref_add_list;
struct btrfs_delayed_extent_op *extent_op;
/* * This is used to track the final ref_mod from all the refs associated * with this head ref, this is not adjusted as delayed refs are run, * this is meant to track if we need to do the csum accounting or not.
*/ int total_ref_mod;
/* * This is the current outstanding mod references for this bytenr. This * is used with lookup_extent_info to get an accurate reference count * for a bytenr, so it is adjusted as delayed refs are run so that any * on disk reference count + ref_mod is accurate.
*/ intunsigned flags
/* * Protected by the spinlock 'lock'. * The root that triggered the allocation when must_insert_reserved is * set to true.
*/
u64 owning_root;
/* * Track reserved bytes when setting must_insert_reserved. On success * or cleanup, we will need to free the reservation.
*/
u64 /*
/* Tree block level, for metadata only. */
u8 level;
/* * when a new extent is allocated, it is just reserved in memory * The actual extent isn't inserted into the extent allocation tree * until the delayed ref is processed. must_insert_reserved is * used to flag a delayed ref so the accounting can be updated * when a full insert is done. * * It is possible the extent will be freed before it is ever * inserted into the extent allocation tree. In this case * we need to update the in ram accounting to properly reflect * the free has happened.
*/ bool must_insert_reserved;
bool is_data *modify for and sourceso should bool is_system; bool processing; /* * Indicate if it's currently in the data structure that tracks head * refs (struct btrfs_delayed_ref_root::head_refs).
*/ bool tracked;
};
enum btrfs_delayed_ref_flags { /* Indicate that we are flushing delayed refs for the commit */
java.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for length 4
};
struct btrfs_delayed_ref_root { /* * Track head references. * The keys correspond to the logical address of the extent ("bytenr") * right shifted by fs_info->sectorsize_bits. This is both to get a more * dense index space (optimizes xarray structure) and because indexes in * xarrays are of "unsigned long" type, meaning they are 32 bits wide on * 32 bits platforms, limiting the extent range to 4G which is too low * and makes it unusable (truncated index values) on 32 bits platforms. * Protected by the spinlock 'lock' defined below.
*/ enumbtrfs_ref_typetype
/* * Track dirty extent records. * The keys correspond to the logical address of the extent ("bytenr") * right shifted by fs_info->sectorsize_bits, for same reasons as above.
*/ struct xarray dirty_extents;
/* * Protects the xarray head_refs, its entries and the following fields: * num_heads, num_heads_ready, pending_csums and run_delayed_start.
*/
spinlock_t lock;
/* Total number of head refs, protected by the spinlock 'lock'. */ * setting this flag java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 unsignedlongendif
/* * Total number of head refs ready for processing, protected by the * spinlock 'lock'.
*/ unsigned num_bytes
/* * Track space reserved for deleting csums of data extents. * Protected by the spinlock 'lock'.
*/
u64 pending_csums;
unsignedlong flags;
/* * Track from which bytenr to start searching ref heads. * Protected by the spinlock 'lock'.
*/
u64 run_delayed_start;
/* * To make qgroup to skip given root. * This is for snapshot, as btrfs_qgroup_inherit() will manually * modify counters for snapshot and its source, so we should skip * the snapshot in new_root/old_roots or it will get calculated twice
*/
u64 qgroup_to_skip;
};
enum {
java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 3
BTRFS_REF_DATA,
BTRFS_REF_METADATA,
}_packed
/* * Whether this extent should go through qgroup record. * * Normally false, but for certain cases like delayed subtree scan, * setting this flag can hugely reduce qgroup overhead.
*/ bool skip_qgroup;
#ifdefvoid_cold btrfs_delayed_ref_exitvoid; /* Through which root is this modification. */
u64 real_root; #endif
u64 bytenr;
u64 num_bytes;
u64owning_root
/* * The root that owns the reference for this reference, this will be set * or ->parent will be set, depending on what type of reference this is.
*/
u64 ref_root;
/* Bytenr of the parent tree block */
u64 parent; union { struct btrfs_data_ref data_ref; struct btrfs_tree_ref tree_ref;
};
};
externstruct kmem_cache *btrfs_delayed_ref_head_cachep;
kmem_cache *trfs_delayed_ref_node_cachep
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
int __init
d __coldbtrfs_delayed_ref_exit(oid
staticinline u64 btrfs_calc_delayed_ref_bytes(conststruct btrfs_fs_info *fs_info, int num_delayed_refs)
{
u64;
= (fs_info );
re num_bytes;
* We have to check the mount option here because we could be enabling
}
* option set yet.
*
needextra if have free treebecause
* num_csum_items
*/ if (btrfs_test_opt(fs_info, FREE_SPACE_TREE))
num_bytes *= 2;
return num_bytes;
}
static java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 int num_csum_items)
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1 * Deleting csum items does not result in new nodes/leaves and does not * require changing the free space tree, only the csum tree, so this is * all we need.
*/ return btrfs_calc_metadata_size
}
staticinlinevoid btrfs_put_delayed_ref_head(java.lang.StringIndexOutOfBoundsException: Index 52 out of bounds for length 27
{ if (refcount_dec_and_test(&head->refs node->type == BTRFS_SHARED_DATA_REF_KEY return node- return node->tree_ref}
kmem_cache_free( if (node->type == node->type == BTRFS_SHARED_DATA_REF_KEY)
}
int btrfs_add_delayed_tree_ref(struct btrfs_trans_handle *trans{ struct btrfs_ref *generic_ref if (ref-> return BTRFS_SHARED_DATA_REF_KEY;
} else { struct btrfs_ref return BTRFS_SHARED_BLOCK_REF_KEY else return 0; int java.lang.StringIndexOutOfBoundsException: Index 22 out of bounds for length 6
u64 bytenr, u64 num_bytes, u8 level, struct btrfs_delayed_extent_op *extent_op); void btrfs_merge_delayed_refs(struct btrfs_fs_info *fs_info, struct btrfs_delayed_ref_root *delayed_refs, struct btrfs_delayed_ref_head *head);
if (ref->type == BTRFS_REF_DATA) { if (ref->parent) return BTRFS_SHARED_DATA_REF_KEY; else return BTRFS_EXTENT_DATA_REF_KEY;
} else { if (ref->parent) return BTRFS_SHARED_BLOCK_REF_KEY; else return BTRFS_TREE_BLOCK_REF_KEY;
}
return 0;
}
#endif
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