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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/fs/devfs.c
+5 -3
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@@ -120,9 +120,7 @@ int devfs_getattr(vnode_t *node, vattr_t *attr, cred_t *cred) {
devnode_t *devnode = (devnode_t *)node;
if (devnode->physical && devnode->physical != node) {
INTERNAL_LOCK(devnode->physical);
int err = VOP_GETATTR(devnode->physical, attr, cred);
INTERNAL_UNLOCK(devnode->physical);
return err;
}
@@ -451,6 +449,7 @@ int devfs_getbyname(char *name, vnode_t **ret) {
if (error)
goto cleanup;
VOP_UNLOCK(*ret);
cleanup:
return error;
}
@@ -480,7 +479,6 @@ int devfs_register(devops_t *devops, char *name, int type, int major, int minor,
attr.uid = cred == NULL ? 0 : cred->euid;
attr.gid = cred == NULL ? 0 : cred->egid;
vnode_t *dir = NULL;
char lastcomp[strlen(name) + 1];
error = vfs_lookup(&dir, (vnode_t *)devfsroot, name, lastcomp, VFS_LOOKUP_PARENT);
@@ -493,6 +491,8 @@ int devfs_register(devops_t *devops, char *name, int type, int major, int minor,
// the devfs node will have a reference from both the devtable and from the fs link
error = VOP_CREATE(dir, lastcomp, &attr, type, &newvnode, NULL);
// locked by vfs_lookup
VOP_UNLOCK(dir);
VOP_RELEASE(dir);
if (error) {
@@ -507,6 +507,8 @@ int devfs_register(devops_t *devops, char *name, int type, int major, int minor,
master->attr = newdevnode->attr;
master->vnode.type = type;
newdevnode->master = master;
// locked by VOP_CREATE
VOP_UNLOCK(newvnode);
return 0;
}