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vfs: redo locking

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Matheus
2024-08-26 21:47:23 -03:00
parent da150523ba
commit 42bda0bf92
32 changed files with 271 additions and 169 deletions
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kernel-src/mm/vmmcache.c
+6
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@@ -102,6 +102,7 @@ static void removepage(page_t *page) {
--vmmcache_cachedpages;
}
// vnode expected locked
int vmmcache_getpage(vnode_t *vnode, uintmax_t offset, page_t **res) {
__assert(vnode->type == V_TYPE_REGULAR || vnode->type == V_TYPE_BLKDEV);
__assert((offset % PAGE_SIZE) == 0);
@@ -292,6 +293,7 @@ int vmmcache_truncate(vnode_t *vnode, uintmax_t offset) {
// called with lock held
// returns with lock released
// expects backing lock to be held
static int syncpage(page_t *page) {
__assert(page->flags & PAGE_FLAGS_DIRTY);
page->flags &= ~PAGE_FLAGS_DIRTY;
@@ -312,6 +314,7 @@ static int syncpage(page_t *page) {
static page_t *dirtylist;
// expects vnode to be held
int vmmcache_syncvnode(vnode_t *vnode, uintmax_t offset, size_t size) {
offset = ROUND_DOWN(offset, PAGE_SIZE);
uintmax_t top = offset + size;
@@ -381,6 +384,7 @@ int vmmcache_sync() {
return 0;
}
// backing expected locked
int vmmcache_makedirty(page_t *page) {
bool madedirty = false;
HOLD_LOCK();
@@ -437,7 +441,9 @@ static void writer() {
page->writenext = NULL;
// TODO notify error on vmmcache_syncvnode
VOP_LOCK(page->backing);
syncpage((page_t *)page);
VOP_UNLOCK(page->backing);
}
}