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slab: rewrite slab allocator

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Matheus
2025-09-04 22:40:10 -03:00
parent 8cba07f65c
commit 2fa040096c
11 changed files with 500 additions and 261 deletions
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kernel-src/fs/devfs.c
+17 -9
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@@ -254,6 +254,13 @@ int devfs_maxseek(vnode_t *node, size_t *max) {
return devnode->devops->maxseek ? devnode->devops->maxseek(devnode->attr.rdevminor, max) : ENOTTY;
}
static void destroy_node(devnode_t *node) {
memset(node, 0, sizeof(devnode_t));
VOP_INIT(&node->vnode, &vnops, 0, 0, NULL)
node->attr.inode = ++currentinode;
slab_free(nodecache, node);
}
int devfs_inactive(vnode_t *node) {
INTERNAL_LOCK(node);
devnode_t *devnode = (devnode_t *)node;
@@ -267,7 +274,7 @@ int devfs_inactive(vnode_t *node) {
if (devnode->devops && devnode->devops->inactive)
devnode->devops->inactive(devnode->attr.rdevminor);
slab_free(nodecache, node);
destroy_node(devnode);
return 0;
}
@@ -311,13 +318,13 @@ int devfs_create(vnode_t *parent, char *name, vattr_t *attr, int type, vnode_t *
if (type == V_TYPE_DIR) {
int error = hashtable_init(&node->children, 100);
if (error) {
slab_free(nodecache, node);
destroy_node(node);
INTERNAL_UNLOCK(parent);
return error;
}
if (hashtable_set(&node->children, node, ".", 1, true) || hashtable_set(&node->children, parent, "..", 2, true)) {
hashtable_destroy(&node->children);
slab_free(nodecache, node);
destroy_node(node);
INTERNAL_UNLOCK(parent);
return error;
}
@@ -328,7 +335,7 @@ int devfs_create(vnode_t *parent, char *name, vattr_t *attr, int type, vnode_t *
if (type == V_TYPE_DIR)
hashtable_destroy(&node->children);
INTERNAL_UNLOCK(parent);
slab_free(nodecache, node);
destroy_node(node);
return error;
}
@@ -476,16 +483,17 @@ static vops_t vnops = {
.unlock = devfs_unlock
};
static void ctor(scache_t *cache, void *obj) {
static bool ctor(scache_t *cache, void *obj) {
devnode_t *node = obj;
memset(node, 0, sizeof(devnode_t));
VOP_INIT(&node->vnode, &vnops, 0, 0, NULL)
node->attr.inode = ++currentinode;
return true;
}
void devfs_init() {
__assert(hashtable_init(&devtable, 50) == 0);
nodecache = slab_newcache(sizeof(devnode_t), 0, ctor, ctor);
nodecache = slab_newcache(sizeof(devnode_t), 0, ctor, NULL);
MUTEX_INIT(&tablelock);
__assert(nodecache);
@@ -525,7 +533,7 @@ int devfs_register(devops_t *devops, char *name, int type, int major, int minor,
int error = hashtable_set(&devtable, master, key, sizeof(key), true);
MUTEX_RELEASE(&tablelock);
if (error) {
slab_free(nodecache, master);
destroy_node(master);
return error;
}
@@ -540,7 +548,7 @@ int devfs_register(devops_t *devops, char *name, int type, int major, int minor,
char lastcomp[strlen(name) + 1];
error = vfs_lookup(&dir, (vnode_t *)devfsroot, name, lastcomp, VFS_LOOKUP_PARENT);
if (error) {
slab_free(nodecache, master);
destroy_node(master);
return error;
}
@@ -556,7 +564,7 @@ int devfs_register(devops_t *devops, char *name, int type, int major, int minor,
MUTEX_ACQUIRE(&tablelock);
__assert(hashtable_remove(&devtable, key, sizeof(key) == 0));
MUTEX_RELEASE(&tablelock);
slab_free(nodecache, master);
destroy_node(master);
return error;
}