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BFS: Fix handling of the last_modified index.

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Its values must be shifted before comparing against them.
Also handle the last-modified times correctly in NodeGetLastModifiedTime.

Fixes an issue noticed in #19080 which was a regression from
the query refactor earlier this year.

Also while at it, remove a needless lock in EntryGetName;
Inode::GetName acquires this lock for us.
This commit is contained in:
Augustin Cavalier 2024-11-21 22:38:10 -05:00
parent 1abf2059a7
commit 783b77b14f
1 changed files with 33 additions and 5 deletions
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38
src/add-ons/kernel/file_systems/bfs/Query.cpp
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@ -27,19 +27,25 @@ struct Query::QueryPolicy {
typedef ::Inode Node;
struct Index : ::Index {
bool isSpecialTime;
Index(Context* context)
:
::Index(context->fVolume)
::Index(context->fVolume),
isSpecialTime(false)
{
}
};
struct IndexIterator : TreeIterator {
off_t offset;
bool isSpecialTime;
IndexIterator(BPlusTree* tree)
:
TreeIterator(tree)
TreeIterator(tree),
offset(0),
isSpecialTime(false)
{
}
};
@ -71,7 +77,6 @@ struct Query::QueryPolicy {
static ssize_t EntryGetName(Inode* inode, void* buffer, size_t bufferSize)
{
RecursiveLocker locker(&inode->SmallDataLock());
status_t status = inode->GetName((char*)buffer, bufferSize);
if (status != B_OK)
return status;
@ -99,7 +104,17 @@ struct Query::QueryPolicy {
static status_t IndexSetTo(Index& index, const char* attribute)
{
return index.SetTo(attribute);
status_t status = index.SetTo(attribute);
if (status == B_OK) {
// The special time flag is set if the time values are shifted
// 64-bit values to reduce the number of duplicates.
// We have to be able to compare them against unshifted values
// later. The only index which needs this is the last_modified
// index, but we may want to open that feature for other indices,
// too one day.
index.isSpecialTime = (strcmp(attribute, "last_modified") == 0);
}
return status;
}
static void IndexUnset(Index& index)
@ -132,6 +147,7 @@ struct Query::QueryPolicy {
if (iterator == NULL)
return NULL;
iterator->isSpecialTime = index.isSpecialTime;
return iterator;
}
@ -145,6 +161,13 @@ struct Query::QueryPolicy {
static status_t IndexIteratorFind(IndexIterator* iterator,
const void* value, size_t size)
{
int64 shiftedTime;
if (iterator->isSpecialTime) {
// int64 time index; convert value.
shiftedTime = *(int64*)value << INODE_TIME_SHIFT;
value = &shiftedTime;
}
return iterator->Find((const uint8*)value, size);
}
@ -158,6 +181,11 @@ struct Query::QueryPolicy {
if (status != B_OK)
return status;
if (iterator->isSpecialTime) {
// int64 time index; convert value.
*(int64*)indexValue >>= INODE_TIME_SHIFT;
}
*_keyLength = keyLength;
*_duplicate = duplicate;
return B_OK;
@ -203,7 +231,7 @@ struct Query::QueryPolicy {
static time_t NodeGetLastModifiedTime(Inode* inode)
{
return inode->Node().LastModifiedTime();
return bfs_inode::ToSecs(inode->Node().LastModifiedTime());
}
static status_t NodeGetAttribute(NodeHolder& holder, Inode* inode,