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for-6.12-rc3-tag

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Merge tag 'for-6.12-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux

Pull btrfs fixes from David Sterba:

 - regression fix: dirty extents tracked in xarray for qgroups must be
   adjusted for 32bit platforms

 - fix potentially freeing uninitialized name in fscrypt structure

 - fix warning about unneeded variable in a send callback

* tag 'for-6.12-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
  btrfs: fix uninitialized pointer free on read_alloc_one_name() error
  btrfs: send: cleanup unneeded return variable in changed_verity()
  btrfs: fix uninitialized pointer free in add_inode_ref()
  btrfs: use sector numbers as keys for the dirty extents xarray
This commit is contained in:
Linus Torvalds 2024-10-16 09:30:20 -07:00
commit 667b1d41b2
5 changed files with 37 additions and 19 deletions
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15
fs/btrfs/delayed-ref.c
View File

@ -849,6 +849,7 @@ add_delayed_ref_head(struct btrfs_trans_handle *trans,
struct btrfs_qgroup_extent_record *qrecord,
int action, bool *qrecord_inserted_ret)
{
struct btrfs_fs_info *fs_info = trans->fs_info;
struct btrfs_delayed_ref_head *existing;
struct btrfs_delayed_ref_root *delayed_refs;
bool qrecord_inserted = false;
@ -859,11 +860,11 @@ add_delayed_ref_head(struct btrfs_trans_handle *trans,
if (qrecord) {
int ret;
ret = btrfs_qgroup_trace_extent_nolock(trans->fs_info,
delayed_refs, qrecord);
ret = btrfs_qgroup_trace_extent_nolock(fs_info, delayed_refs, qrecord);
if (ret) {
/* Clean up if insertion fails or item exists. */
xa_release(&delayed_refs->dirty_extents, qrecord->bytenr);
xa_release(&delayed_refs->dirty_extents,
qrecord->bytenr >> fs_info->sectorsize_bits);
/* Caller responsible for freeing qrecord on error. */
if (ret < 0)
return ERR_PTR(ret);
@ -873,7 +874,7 @@ add_delayed_ref_head(struct btrfs_trans_handle *trans,
}
}
trace_add_delayed_ref_head(trans->fs_info, head_ref, action);
trace_add_delayed_ref_head(fs_info, head_ref, action);
existing = htree_insert(&delayed_refs->href_root,
&head_ref->href_node);
@ -895,8 +896,7 @@ add_delayed_ref_head(struct btrfs_trans_handle *trans,
if (head_ref->is_data && head_ref->ref_mod < 0) {
delayed_refs->pending_csums += head_ref->num_bytes;
trans->delayed_ref_csum_deletions +=
btrfs_csum_bytes_to_leaves(trans->fs_info,
head_ref->num_bytes);
btrfs_csum_bytes_to_leaves(fs_info, head_ref->num_bytes);
}
delayed_refs->num_heads++;
delayed_refs->num_heads_ready++;
@ -1030,7 +1030,8 @@ static int add_delayed_ref(struct btrfs_trans_handle *trans,
goto free_head_ref;
}
if (xa_reserve(&trans->transaction->delayed_refs.dirty_extents,
generic_ref->bytenr, GFP_NOFS)) {
generic_ref->bytenr >> fs_info->sectorsize_bits,
GFP_NOFS)) {
ret = -ENOMEM;
goto free_record;
}

10
fs/btrfs/delayed-ref.h
View File

@ -202,7 +202,15 @@ struct btrfs_delayed_ref_root {
/* head ref rbtree */
struct rb_root_cached href_root;
/* Track dirty extent records. */
/*
* Track dirty extent records.
* 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.
*/
struct xarray dirty_extents;
/* this spin lock protects the rbtree and the entries inside */

21
fs/btrfs/qgroup.c
View File

@ -2005,16 +2005,26 @@ int btrfs_qgroup_trace_extent_nolock(struct btrfs_fs_info *fs_info,
struct btrfs_qgroup_extent_record *record)
{
struct btrfs_qgroup_extent_record *existing, *ret;
unsigned long bytenr = record->bytenr;
const unsigned long index = (record->bytenr >> fs_info->sectorsize_bits);
if (!btrfs_qgroup_full_accounting(fs_info))
return 1;
#if BITS_PER_LONG == 32
if (record->bytenr >= MAX_LFS_FILESIZE) {
btrfs_err_rl(fs_info,
"qgroup record for extent at %llu is beyond 32bit page cache and xarray index limit",
record->bytenr);
btrfs_err_32bit_limit(fs_info);
return -EOVERFLOW;
}
#endif
lockdep_assert_held(&delayed_refs->lock);
trace_btrfs_qgroup_trace_extent(fs_info, record);
xa_lock(&delayed_refs->dirty_extents);
existing = xa_load(&delayed_refs->dirty_extents, bytenr);
existing = xa_load(&delayed_refs->dirty_extents, index);
if (existing) {
if (record->data_rsv && !existing->data_rsv) {
existing->data_rsv = record->data_rsv;
@ -2024,7 +2034,7 @@ int btrfs_qgroup_trace_extent_nolock(struct btrfs_fs_info *fs_info,
return 1;
}
ret = __xa_store(&delayed_refs->dirty_extents, record->bytenr, record, GFP_ATOMIC);
ret = __xa_store(&delayed_refs->dirty_extents, index, record, GFP_ATOMIC);
xa_unlock(&delayed_refs->dirty_extents);
if (xa_is_err(ret)) {
qgroup_mark_inconsistent(fs_info);
@ -2129,6 +2139,7 @@ int btrfs_qgroup_trace_extent(struct btrfs_trans_handle *trans, u64 bytenr,
struct btrfs_fs_info *fs_info = trans->fs_info;
struct btrfs_qgroup_extent_record *record;
struct btrfs_delayed_ref_root *delayed_refs;
const unsigned long index = (bytenr >> fs_info->sectorsize_bits);
int ret;
if (!btrfs_qgroup_full_accounting(fs_info) || bytenr == 0 || num_bytes == 0)
@ -2137,7 +2148,7 @@ int btrfs_qgroup_trace_extent(struct btrfs_trans_handle *trans, u64 bytenr,
if (!record)
return -ENOMEM;
if (xa_reserve(&trans->transaction->delayed_refs.dirty_extents, bytenr, GFP_NOFS)) {
if (xa_reserve(&trans->transaction->delayed_refs.dirty_extents, index, GFP_NOFS)) {
kfree(record);
return -ENOMEM;
}
@ -2152,7 +2163,7 @@ int btrfs_qgroup_trace_extent(struct btrfs_trans_handle *trans, u64 bytenr,
spin_unlock(&delayed_refs->lock);
if (ret) {
/* Clean up if insertion fails or item exists. */
xa_release(&delayed_refs->dirty_extents, record->bytenr);
xa_release(&delayed_refs->dirty_extents, index);
kfree(record);
return 0;
}

4
fs/btrfs/send.c
View File

@ -7190,13 +7190,11 @@ static int changed_extent(struct send_ctx *sctx,
static int changed_verity(struct send_ctx *sctx, enum btrfs_compare_tree_result result)
{
int ret = 0;
if (!sctx->cur_inode_new_gen && !sctx->cur_inode_deleted) {
if (result == BTRFS_COMPARE_TREE_NEW)
sctx->cur_inode_needs_verity = true;
}
return ret;
return 0;
}
static int dir_changed(struct send_ctx *sctx, u64 dir)

6
fs/btrfs/tree-log.c
View File

@ -1374,7 +1374,7 @@ static noinline int add_inode_ref(struct btrfs_trans_handle *trans,
struct inode *inode = NULL;
unsigned long ref_ptr;
unsigned long ref_end;
struct fscrypt_str name;
struct fscrypt_str name = { 0 };
int ret;
int log_ref_ver = 0;
u64 parent_objectid;
@ -1845,7 +1845,7 @@ static noinline int replay_one_name(struct btrfs_trans_handle *trans,
struct btrfs_dir_item *di,
struct btrfs_key *key)
{
struct fscrypt_str name;
struct fscrypt_str name = { 0 };
struct btrfs_dir_item *dir_dst_di;
struct btrfs_dir_item *index_dst_di;
bool dir_dst_matches = false;
@ -2125,7 +2125,7 @@ static noinline int check_item_in_log(struct btrfs_trans_handle *trans,
struct extent_buffer *eb;
int slot;
struct btrfs_dir_item *di;
struct fscrypt_str name;
struct fscrypt_str name = { 0 };
struct inode *inode = NULL;
struct btrfs_key location;