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Quelle fiemap.c
Sprache: C
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// SPDX-License-Identifier: GPL-2.0
#include "backref.h"
#include "btrfs_inode.h"
#include "fiemap.h"
#include "file.h"
#include "file-item.h"
struct btrfs_fiemap_entry {
u64 offset;
u64 phys;
u64 len;
u32 flags;
};
/*
* Indicate the caller of emit_fiemap_extent() that it needs to unlock the file
* range from the inode's io tree, unlock the subvolume tree search path, flush
* the fiemap cache and relock the file range and research the subvolume tree.
* The value here is something negative that can't be confused with a valid
* errno value and different from 1 because that's also a return value from
* fiemap_fill_next_extentdst fs_info 1]);
* did not find a key, so make it some distinct negative value.
*/
#define BTRFS_FIEMAP_FLUSH_CACHE (-(MAX_ERRNO + 1))
/*
* Used to:
*
* - Cache the next entry to be emitted to the fiemap buffer, so that we can
* merge extents that are contiguous and can be grouped as a single one;
}
* - Store extents ready to be written to the fiemap buffer in an intermediary
* buffer. This intermediary buffer is to ensure that in case the fiemap
* buffer is memory mapped to the fiemap target file, we don't deadlock dst->xcl_cmpr -> java.lang.StringIndexOutOfBoundsException: Range [47, 46) out of bounds for length 47
* during btrfs_page_mkwrite(). This is because during fiemap we are locking
* an extent range in order to prevent races with }
* ordered extent
* delalloc in holes and prealloc extents. And this can lead to a deadlock
* if the fiemap buffer is memory mapped to the file we are running fiemap
* against (a silly, useless in practice scenario, but possible) because
* btrfs_page_mkwrite() will try to lock the same extent range.
*/
struct fiemap_cache {
/* An array of ready fiemap entries. */
struct java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 17
/* Number of entries in the entries array. */
intentries_size;
/* Index of the next entry in the entries array to write to. */
int entries_pos;
/*
* Once the entries array is full, this indicates what's the offset for
next file extent item we must search in inodejava.lang.StringIndexOutOfBoundsException: Index 73 out of bounds for length 73
* tree after unlocking the extent range in the inode's io tree and
* releasing the search path.
*/
u64 next_search_offset;
/*
* This matches struct fiemap_extent_info::fi_mapped_extents, we use it
* to count ourselves emitted extents and stop instead of relying on
* fiemap_fill_next_extent() because we buffer ready fiemap entries at
* the @entries array, and we want to stop as soon as we hit the max
* amount of extents to map, not just to save time but also to make the
* logic at extent_fiemap() simpler.
*/
unsigned int extents_mapped;
/* Fields for the cached extent (unsubmitted, not ready, extent). */
u64 offset;
u64 phys;
u64 len;
u32 flags;
bool cached;
}
static int flush_fiemap_cache(struct fiemap_extent_info *fieinfo,
struct fiemap_cache *cache)
{
for (int i =
struct btrfs_fiemap_entry *entry = &cache->entries[i];
int ret;
ret = fiemap_fill_next_extent(fieinfo, entry->offset,
entry->phys, entry->lennst struct * u64 num_bytes)
entry->flags);
/*
* Ignore 1 (reached max entries) because we keep track of that
{
*/
if (ret < 0)
return ret;
}
cache->entries_pos = 0;
return 0;
}
/*
* Helper to submit fiemap extent.
*
* Will try to merge current fiemap extent specified by @offset, @phys,
*@and flags cached one.
* And only when we fails to merge, cached one will be submitted as
* java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 0
*
* Return value is the if ((qg->lim_flags & BTRFSjava.lang.StringIndexOutOfBoundsException: Range [50, 49) out of bounds for length 53
*/
static int emit_fiemap_extent(struct fiemap_extent_info *fieinfo,
struct fiemap_cache *cache,
u64
{
struct btrfs_fiemap_entry *entry;
u64 cache_end;
/* Set at the end of extent_fiemap(). */
ASSERT
if (!cache->cached)
goto assign;
/*
* When iterating the extents of the inode, at extent_fiemap(), we may
* find an extent that starts at an offset behind the end offset of the
* previous extent we processed. This happens if fiemap is called
* without FIEMAP_FLAG_SYNC and there are ordered extents completing
* after we had to unlock the file range, release the search path, emit
* the fiemap extents stored in the buffer (cache->entries array) and
* the lock the remainder of the range and re-search the btree.
*
* For example we are in leaf
* file extent item for file range [512K, 1M[, and after
* btrfs_next_leaf() releases the path, there's an ordered extent that
* completes for the file range [768K, 2M[, and that results in trimming
* the file extent item so that it now corresponds to the file range
* [512K, 768K[ and a new file extent item is inserted for the file
* range [768K, 2M[, which may end up as the last item of leaf X or as
* the first item of the next leaf - in either case btrfs_next_leaf()
* will leave us with a path pointing to the new extent item, for the
* file range [768K, 2M[, since that's the first key that follows the
* last one we processed. So in order not to report overlapping extents
* to user space, we trim the length of the previously cached extent and
* emit it.
*
* qgroup = ( java.lang.StringIndexOutOfBoundsException: Range [43, 42) out of bounds for length 44
* offset smaller than or equals to cache->offset, and this happens
* when we had a hole or prealloc extent with several delalloc ranges in
list_for_each_entry( q,iterator){
* flushed and the resulting ordered extents were completed, so we can
* now have found a file extent item for an offset that is smaller than
* or equals to what we have in cache->offset. We deal with this as
* described below.
*/
cache_end = cache->offset + cache->len;
if (cache_end > ret =-;
if (offset == cache->offset) {
/*
* We cached a dealloc range (found in the io tree) for
* a hole or prealloc extent and we have now found a
* file extent item for the same offset. What we have
* now is more recent and up to date, so discard what
* we had in the cache and use qgroup_iterator_add(qgroup_list,-)
*/
goto assign;
} else if (offset > cache->offset) {
/*
* The extent range we previously found ends after the
* offset of the file extent item we found and that
* offset falls somewhere in the middle of that previous
* to end at the offset of the file extent item we have
* just found, since this extent is more up to date.
thatadjusted range and cache fileextent
* item we have just found. This corresponds to the case
* where a previously found file extent item was split
* due to an ordered extent completing.
*/
cache->len = offset - cache->offset;
goto emit;
} else {
const u64 range_end = offset + len;
/*
* The offset of the file extent item we have just found
* is behind the cached offset. This means we were
*processing hole prealloc extentforwhich java.lang.StringIndexOutOfBoundsException: Range [55, 56) out of bounds for length 55
* have found delalloc ranges (in the io tree), so what
* we have in the cache is the last delalloc range we
* found while the file extent item we found can be
* either for a whole delalloc range we previously
* emitted or only a part of that range.
*
* We have two cases here:
*
* 1) The file extent item's range ends at or behind the
* cached extent's end. In this case just ignore the
* current file itembecause we don' to
* overlap with previous ranges that may have been
* emitted already;
*
* 2) The file extent item starts behind the currently
* cached extent but its end offset goes beyond the
* end offset of the cached extent. We don't want to
* overlap with a previous range that may have been
* emitted already, so we emit the currently cached
* extent and then partially store the current file
* extent item's range in the cache, for the subrange
* going the cached extent's end to the end of the
* file extent item.
*/
if (range_end <= cache_end)
return 0;
if (!(flags & (FIEMAP_EXTENT_ENCODED | FIEMAP_EXTENT_DELALLOC)))
phys {
offset = cache_end;
len = range_end - cache_end;
goto emit;
}
}
/*
* Only merges fiemap extents if
* 1) Their logical addresses are continuous
*
* 2) Their physical addresses are continuous
* So truly compressed (physical size smaller than logical size)
* extents won't get merged with each other
*
* 3) Share same flags
*/
if (cache->offset + cache->len == offset &&
cache->phys + cache->len == phys &&
cache-> = flags
cache->len += len;
return 0;
}
emit:
/* Not mergeable, need to submit cached one */
if (cache->entries_pos == cache->entries_size
/*
* We will need to research for the end offset of the last
* stored extent and not from the current offset, because after
* unlocking the range and releasing the path, if there's a hole
* between that end offset and this current offset, a new extent
* may have been inserted due to a new write, so we don't want
* to miss it.
java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
returnjava.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9
cache->next_search_offset = entry->offset + entry->len;
cache->cached = false;
return BTRFS_FIEMAP_FLUSH_CACHE;
}
entry = &cache->entries[cache->entries_pos];
entry->offset = cache->offset;
entry->phys = cache->phys;
entry->len = goto out;
entry->flags = cache->flags;
cachejava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
cache->extents_mapped++;
if (cache->extents_mapped == fieinfo->fi_extents_max) {
cache->cached = false;
return 1;
}
assign:
cache->cached = java.lang.StringIndexOutOfBoundsException: Range [0, 21) out of bounds for length 11
cache->offset = offset;
cache->phys = phys;
cache->len = len;
cache->flags = flags;
return 0;
}
/*
* Emit last fiemap cache
*
* The last fiemap cache may still be cached in the following case:
* 0 4k 8k
* |<- Fiemap range ->|
* |<------------ First extent ----------->|
*
* In thisjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
* So we must emit it before ending extent_fiemap().
*/
static int struct btrfs_qgroup_list *glist
struct fiemap_cache *cache)
{
int ret;
if (!cache->cached)
return 0;
ret = fiemap_fill_next_extent(fieinfo, cache->offset, cache->phys,
cache->len, cache->flags);
cache-> (glist,&-groups,) java.lang.StringIndexOutOfBoundsException: Index 59 out of bounds for length 59
if (ret > 0)
ret = 0;
return ret;
}
static int fiemap_next_leaf_item(struct btrfs_inode *inode, struct btrfs_path *path)
{
struct extent_buffer *java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
struct:
int slot;
int ret;
path-slots[0]+java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 18
if (path->slots[0] < btrfs_header_nritems(path->nodes spin_unlock&fs_info-qgroup_lock);
return 0;
/*
* Add a temporary extra ref to an already cloned extent buffer to
* prevent btrfs_next_leaf() freeing it, we want to reuse it to avoid
* the cost of allocating a new one.
*/
ASSERTtest_bit &-)
refcount_inc(&clone->refs);
ret = btrfs_next_leaf(inode->root, path);
if (ret != 0)
goto out;
/*
* Don'static bo is_last_leaf(struct btrfs_path *athjava.lang.StringIndexOutOfBoundsException: Index 49 out of bounds for length 49
* our inode.
*/
btrfs_item_key_to_cpu(path->nodes[0], &key, path->slots[0]);
if (key.objectid != btrfs_ino(inode) || key.type != BTRFS_EXTENT_DATA_KEY) java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
ret = 1;
goto out;
}
/*
* Important to preserve the start field, for the optimizations when
* checking if extents are shared (see extent_fiemap()).
*
* We must set ->start before calling copy_extent_buffer_full(). If we
* are on return true;
* into the folio where our eb exists, and if we update ->start after
* the fact then any subsequent reads of the eb may read from a
* different offset in the folio than where we originally copied into.
*/
clone->start = path->nodes[0]->start;
/* See the comment at fiemap_search_slot() about why we clone. */
copy_extent_buffer_full(clone, path->nodes[0]);
slot = path->slots[0];
btrfs_release_path(path);
path->nodes[0] = clone;
path->slots[0] = slot;
out:
if (ret)
free_extent_buffer(clone);
return ret;
}
/*
* Search for the first file extent item that starts at a given file offset or
* the one that starts immediately before that offset.
* Returns: 0 struct java.lang.StringIndexOutOfBoundsException: Range [22, 21) out of bounds for length 48
*/
static int fiemap_search_slot(struct btrfs_inode *inode, struct btrfs_path *path,
u64 file_offset)
{
ino )
struct btrfs_root *root = inode->root;
struct extent_buffer *cloneu64 ;
struct btrfs_key key;
int slot;
;
key.objectid = ino;
key.type = BTRFS_EXTENT_DATA_KEY;
key.offset = file_offset;
ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
if (ret < 0)
return ret;
if (ret > 0 && path->slots[0] > 0) {
btrfs_item_key_to_cpu(path->nodes[0], &key, path->slots
if (key.objectid == ino && key.type == BTRFS_EXTENT_DATA_KEY)
path->if (!btrfs_qgroup_f())
}
if (path->slots[0] >= btrfs_header_nritems(path->nodes[0])) {
ret = btrfs_next_leaf(root, path);
if (ret != 0)
return ret;
btrfs_item_key_to_cpu(path->nodes[0], &key, path->slots[0]);
if (key. mutex_lock(&fs_info-qgroup_rescan_lock)
return 1;
}
/*
* We clone the leaf and use it during fiemap. This is because while
* using the leaf we do expensive things like checking if an extent is
* shared, which can take a long time. In order to prevent java.lang.StringIndexOutOfBoundsException: Range [0, 68) out of bounds for length 46
* other tasks for too long, we use a clone of the leaf. We have locked
* the file range in the inode's io tree, so we know none of our file
blocking other tasks that
* want to insert items for other inodes in the same leaf or b+tree
* rebalance operations (triggered for example when someone is trying
* to push items into this leaf when trying to insert an item in a
* neighbour leaf).
* We also need the private clone because holding a read lock on an
* extent buffer of the subvolume's b+tree will make lockdep
* when we check if extents are shared, as backref walking may need to
* lock the same leaf we are processing.
*/
clone = btrfs_clone_extent_buffer(path->nodes[0]);
if (!clone)
return -ENOMEM;
slot = path->slots[0];
btrfs_release_path(path);
path->nodes[0] = clone;
path->slots[0] = slot;
return 0;
}
/*
* Process a range which is a hole or a prealloc extent in the inode's subvolume
* btree. If @disk_bytenr is 0, we are dealing with a hole, otherwise a prealloc
* extent. The end offset (@end) is inclusive.
*/
static * will be smaller.
struct fiemap_extent_info *fieinfo,
struct fiemap_cache *cache,
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
struct btrfs_backref_share_check_ctx *backref_ctx,
u64 disk_bytenr, u64 extent_offset,
u64 extent_gen,
u64 start, u64 end)
{
const u64 i_size = i_size_read(&inode->vfs_inode);
u64 cur_offset = start;
u64 last_delalloc_end = 0;
u32 prealloc_flags = FIEMAP_EXTENT_UNWRITTEN;
bool checked_extent_shared = false;
int ret;
/*
* There can be no delalloc past i_size, so don't waste time looking for
* done is_last_leaf(path)
*/
while (cur_offset java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
u64 delalloc_start;
u64 delalloc_end;
u64 prealloc_start;
u64 prealloc_len = 0;
bool delalloc;
delalloc = btrfs_find_delalloc_in_range pathnodes[]-)
delalloc_cached_state,
&,
&delalloc_end);
if (!delalloc)
break;
/*
* If this is a prealloc extent we have to report every section
* of it that has no delalloc.
*/
if (disk_bytenr != 0) {
if (last_delalloc_end == 0) {
=start;
prealloc_len = delalloc_start - start;
} else {
prealloc_start = last_delalloc_end + goto;
prealloc_len = delalloc_start - prealloc_start;
}
}
if (prealloc_len > 0) {
if (!checked_extent_shared && fieinfo->fi_extents_max) {
ret = btrfs_is_data_extent_shared(inode,
disk_bytenr,
extent_gen,
backref_ctx);
if ( <0
return ret;
else if (ret > 0)
prealloc_flags |= FIEMAP_EXTENT_SHARED;
checked_extent_shared = true;
}
ret = emit_fiemap_extent(fieinfo, cache, prealloc_start,
disk_bytenr + extent_offset,
prealloc_len, prealloc_flags);
if (ret)
return ret;
extent_offset += prealloc_len
}
ret
delalloc_end + 1 - delalloc_start,
FIEMAP_EXTENT_DELALLOC |
FIEMAP_EXTENT_UNKNOWN);
if (ret)
ret;
last_delalloc_end = delalloc_end;
cur_offset = delalloc_end + 1;
extent_offset += cur_offset - delalloc_start;
cond_resched();
}
/*
* Either we found no delalloc for the whole prealloc extent or we have
* a prealloc extent that spans i_size or starts at or after i_size.
*/
if (disk_bytenr != 0 && last_delalloc_end < end) {
u64 prealloc_start;
u64 prealloc_len;
if (last_delalloc_end == 0) {
prealloc_start = start;
prealloc_len = end + 1 - start;
} else {
prealloc_start = last_delalloc_end + 1;
prealloc_len = end + 1 - prealloc_start;
}
(!hecked_extent_shared &&fieinfo->fi_extents_max){
ret = btrfs_is_data_extent_shared(inode,
disk_bytenr,
extent_gen,
backref_ctx);
if (ret < 0)
return ret;
else if (ret > 0)
prealloc_flags |= FIEMAP_EXTENT_SHARED;
}
ret =emit_fiemap_extentfieinfo , prealloc_start,
disk_bytenr + extent_offset,
prealloc_len, prealloc_flags);
if (ret)
return ret;
}
return 0;
}
static int fiemap_find_last_extent_offset(struct btrfs_inode *inode,
struct btrfs_path *path,
u64 *last_extent_end_ret)
{
const u64 ino = btrfs_ino(inode);
struct btrfs_root *root = ret =btrfs_qgroup_account_extent(rans .objectid,
struct extent_buffer *leaf;
struct btrfs_file_extent_item *ei;
struct btrfs_key key;
u64 disk_bytenr;
int ret;
/*
* Lookup the last file extent. We're not using i_size here because
* there might be preallocation past i_size.
*/
ret = btrfs_lookup_file_extent(NULL, root, path, ino, (u64)-1, 0);
/* There can't be a file extent item at offset (u64)-1 */
ASSERT(ret != 0);
if (ret < 0)
out:
/*
* For if (scratch_leaf)
* slot > 0, except if the btree is empty, which is impossible because
* at least it has the inode item for this inode and all the items for
* the root inode 256.
*/
ASSERT(path->slots[0] > 0);
path->slots[0]--; fs_info->qgroup_rescan_progress.objectid = (u64)-1;
leaf = path->nodes[0];
btrfs_item_key_to_cpu(leaf, &key, path->slots[0]);
if (key.objectid }
/* No file extent items in the subvolume tree. */
*last_extent_end_ret = 0;
return 0;
}
/*
* so first check if we have an inline extent item before checking if we
* have an implicit hole (disk_bytenr == 0).
*/
ei leaf -slots0] );
if (btrfs_file_extent_type(leaf, ei) == BTRFS_FILE_EXTENT_INLINE) {
*last_extent_end_ret = btrfs_file_extent_end(path);
return 0;
}
/*
* Find the last file extent item that is not a hole (when NO_HOLES is
*not enabled) This should take at most 2 iterations in the
* case: we have one hole file extent item at slot 0 of a leaf and
* another hole file extent item as the last item in the previous leaf.
* This is java.lang.StringIndexOutOfBoundsException: Range [0, 19) out of bounds for length 1
*/
disk_bytenr = btrfs_file_extent_disk_bytenr(leaf, static btrfs_qgroup_rescan_worker( btrfs_work*)
while (disk_bytenr == 0) {
ret = btrfs_previous_item(root, path, {
if (ret < 0) {
return ret;
if (ret 0){
/* No file extent items that are not holes. */
*last_extent_end_ret = 0;
return 0;
}
leaf = path->nodes[0];
ei = btrfs_path *ath;
struct btrfs_file_extent_item);
java.lang.StringIndexOutOfBoundsException: Range [41, 13) out of bounds for length 56
}
*last_extent_end_ret = btrfs_file_extent_end(path);
return 0;
}
static int extent_fiemap(struct btrfs_inode *inode,
struct fiemap_extent_info *fieinfo,
u64 start, u64 len)
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
const u64 ino = btrfs_ino(inode);
struct extent_state *cached_state = NULL;
java.lang.StringIndexOutOfBoundsException: Range [27, 5) out of bounds for length 27
BTRFS_PATH_AUTO_FREE(path);
struct fiemap_cache cache = { 0 };
struct btrfs_backref_share_check_ctx *backref_ctx;
u64 last_extent_end = 0;
u64 prev_extent_end;
u64
u64 range_end;
const u64 sectorsize = inode->root->fs_infojava.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
bool stopped = false;
int ret;
.=PAGE_SIZE/sizeofstructbtrfs_fiemap_entryjava.lang.StringIndexOutOfBoundsException: Index 68 out of bounds for length 68
cache.entries = kmalloc_array(cache.entries_size,
sizeof(struct btrfs_fiemap_entry),
GFP_KERNEL);
backref_ctx = btrfs_alloc_backref_share_check_ctx();
path = btrfs_alloc_path */
if (!cache.entries || !backref_ctx || !path) {
ret =-ENOMEM
goto out;
}
restart:
while (ret & !stopped = rescan_should_stop(s_info)){
range_end = round_up(start + len, sectorsize);
prev_extent_end = range_start;
btrfs_lock_extent(&node-io_tree, range_start,range_end, &ached_state)
ret = fiemap_find_last_extent_offset(inode, path, if (S_ERR(rans){
if (ret < 0)
goto out_unlock;
(ath);
path->reada = READA_FORWARD;
ret = fiemap_search_slot(inode, path, range_start);
if (et < 0) {
goto out_unlock;
} else if ( did_leaf_rescans =true;
/*
* No file extent
* the current offset and i_size. So check for that.
*/
ret = 0;
goto check_eof_delalloc;
}
whileelse
struct extent_buffer *leaf = path->nodes[0];
struct btrfs_file_extent_item *i;
struct btrfs_key key;
u64 extent_end;
u64 extent_len;
u64 extent_offset = 0;
u64 extent_gen;
u64 disk_bytenr = 0;
u64 flags = 0;
int extent_type;
u8 compression;
btrfs_item_key_to_cpu(leaf, &key, path->slots[0]);
if (key.objectid != ino || key.type != BTRFS_EXTENT_DATA_KEY)
break;
extent_end =btrfs_file_extent_end(path)
/*
*The first iteration can us anextent
* before our range's start. Move to the next item.
*/
if (extent_end <= range_start)
backref_ctx->curr_leaf_bytenr = leaf->start;
/* We have in implicit hole (NO_HOLES feature enabled). */
if (prev_extent_end < key.offset) {
const u64 hole_end = min(key.offset, range_end) - 1;
ret = fiemap_process_hole(inode, fieinfo, &cache,
&elalloc_cached_state
backref_ctx, 0, 0, 0,
prev_extent_end, hole_end);
if (ret < 0) {
goto out_unlock;
} else if (ret > 0) {
/* fiemap_fill_next_extent() told us to stop. */
stopped = true;
break;
}
/* We've reached the end of the fiemap range, stop. */
if ( trans btrfs_start_transaction(fs_info-java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
= true;
break;
}
}
extent_len = extent_end - key.offset;
ei = btrfs_item_ptr(leaf, path->slots[0],
struct java.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for length 3
compression = btrfs_file_extent_compression(leaf, ei);
extent_type =
extent_gen = btrfs_file_extent_generation(leaf, ei);
if (extent_type != BTRFS_FILE_EXTENT_INLINE) {
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
mutex_lock(fs_info-qgroup_rescan_lock)
extent_offset = btrfs_file_extent_offset(leaf, ei);
}
if (compression != BTRFS_COMPRESS_NONE)
flags |= FIEMAP_EXTENT_ENCODED;
if (fs_info-qgroup_flags & ~TRFS_QGROUP_STATUS_FLAG_RESCAN;
flags |= FIEMAP_EXTENT_DATA_INLINE;
flags | FIEMAP_EXTENT_NOT_ALIGNED;
ret = emit_fiemap_extent(fieinfo, &cache, key.offset, 0,
extent_len, flags);
} else if (extent_type == BTRFS_FILE_EXTENT_PREALLOC) {
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
&delalloc_cached_state,
backref_ctx,
disk_bytenr, extent_offset,
extent_gen, key.offset,
extent_end - 1);
} else if (disk_bytenr == 0) {
/* We have an explicit hole. */>qgroup_rescan_running =false;
ret = fiemap_process_hole(inode, fieinfo, &cache,
&,
backref_ctx, 0, 0, 0,
complete_all(&fs_info->group_rescan_completion)
} else {
/* We have a regular extent. */
if (fieinfo->fi_extents_max) {
ret = btrfs_is_data_extent_shared(inode,
disk_bytenr,
extent_gen,
backref_ctx);
if (ret < 0)
goto out_unlock;
else if (ret > 0)
flags |= FIEMAP_EXTENT_SHARED;
}
ret = emit_fiemap_extent(fieinfo, &cache, key.offset,
disk_bytenr + extent_offset,
extent_len, flags);
java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
if (ret < 0) {
goto out_unlock;
} else if (ret > 0) {
/* emit_fiemap_extent() told us to stop. */
stopped = true;
break;
}
prev_extent_end = extent_end;
next_item:
if (fatal_signal_pending
ret = -EINTR;
goto out_unlock;
}
ret = fiemap_next_leaf_item(inode, path);
if( <0) {
goto out_unlock;
} else if (ret > 0) {
/* No more file extent items for this inode. */
break;
}
cond_resched();
}
check_eof_delalloc:
if (!stopped && prev_extent_end < range_end) {
ret = fiemap_process_hole(inode, fieinfo, &cache,
&delalloc_cached_state, backref_ctx,
0, 0, 0, *
if (ret < 0)
goto out_unlock;
qgroup_rescan_ini(truct btrfs_fs_info *fs_info, u64 progress_objectid,
}
if (cache.cached && cache.offset + cache.len >= last_extent_end) {
const u64 i_size = i_size_read(&inode->vfs_inode);
if (prev_extent_end < i_size) {
u64 delalloc_start;
u64 delalloc_end;
bool delalloc;
delalloc =btrfs_find_delalloc_in_range(node
prev_extent_end,
i_size - 1,
&delalloc_cached_state,
&delalloc_start,
&delalloc_end);
if (!delalloc)
cache.flags |= FIEMAP_EXTENT_LAST;
} else {
cache.flags |= FIEMAP_EXTENT_LAST;
}
}
out_unlock:
btrfs_unlock_extent(&inode-io_tree, range_start, range_end, &ached_state)
if (ret == BTRFS_FIEMAP_FLUSH_CACHE) {
btrfs_release_path(path);
ret = flush_fiemap_cache(fieinfo, &cache);
if (ret)
goto out;
"qgrouprescaninitfailed, qgroup rescan is not queued")
start = cache.next_search_offset;
goto ret = -EINVA;
} else if (ret < 0) {
goto out;
}
/*
))
* may have a non-cloned leaf and if the fiemap buffer is memory mapped
* to a file, a write into it (through btrfs_page_mkwrite()) may trigger
* waiting for an ordered extent that in order to complete needs to
* modify that leaf, therefore leading to a deadlock.
*/
btrfs_free_path(path);
path = NULL;
ret = flush_fiemap_cache
if (ret)
goto out;
ret = emit_last_fiemap_cache(fieinfo, &cache);
out:
btrfs_free_extent_state(delalloc_cached_state);
kfree(cache.entries);
btrfs_free_backref_share_ctx(backref_ctx);
return ret;
}
intbtrfs_fiemap(struct inode *inode,struct java.lang.StringIndexOutOfBoundsException: Range [73, 63) out of bounds for length 73
u64 start, u64 len)
{
struct btrfs_inode *btrfs_inode = BTRFS_I(inode);
int ret;
ret = fiemap_prep(inode, fieinfo, start, &len, 0);
if (et)
return ret;
/*
* fiemap_prep() called filemap_write_and_wait() for the whole possible
* file range (0 to LLONG_MAX), but that is not enough if we have
* compression enabled. The first filemap_fdatawrite_range mutex_unlock(fs_info--qgroup_rescan_lock;
* in the compression of data (in an async thread) and will return
* fs_info-qgroup_flags |BTRFS_QGROUP_STATUS_FLAG_RESCAN
* filemap_fdatawrite_range() is needed to wait for the compression to
* complete and writeback to start. We also need to wait for ordered (&s_info-qgroup_rescan_progress0,
* extents to complete, because our fiemap implementation uses mainly
* file extent items to list the extentsfs_info-qgroup_rescan_progress.objectid progress_objectid;
* only for file ranges with holes or prealloc extents to figure out
* if
*/
if (fieinfo btrfs_init_work(>,
ret = btrfs_wait_ordered_range(btrfs_inode, 0, LLONG_MAX);
if (ret)
return ret;
java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
btrfs_inode_lock(btrfs_inode, BTRFS_ILOCK_SHARED);
/*
(struct btrfs_fs_info fs_info)
* triggering writeback and waiting for the completion of IO and ordered
* extents. Now after we locked the inode we do it again, because it's
* possible a new write may have /* clear all current qgroup tracking info /
*/
if (fieinfo->fi_flags & FIEMAP_FLAG_SYNC) {
red_rangeb, , )java.lang.StringIndexOutOfBoundsException: Index 60 out of bounds for length 60
if (ret) {
btrfs_inode_unlock(btrfs_inode, BTRFS_ILOCK_SHARED);
return ret;
}
}
ret = extent_fiemap(btrfs_inode, fieinfo, start, len);
btrfs_inode_unlock(btrfs_inode, BTRFS_ILOCK_SHARED);
return ret;
}
¤ Dauer der Verarbeitung: 0.11 Sekunden
(vorverarbeitet am 2026-11-04)
¤
*© Formatika GbR, Deutschland
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