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Changed the way the vnode cache is set - it's now cleaner and can no longer 

allocate a cache twice.
The VFS is now responsible for allocating the cache object - it will call
the VM to do that if necessary.
Added another accessor call to a pointer to the VFS private vnode object.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@8817 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Axel Dörfler 2004-09-03 14:11:04 +00:00
parent 2f1cbcf862
commit 4872592920
1 changed files with 29 additions and 16 deletions
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45
src/kernel/core/fs/vfs.cpp
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@ -530,7 +530,7 @@ dec_vnode_ref_count(struct vnode *vnode, bool reenter)
if (vnode->cache)
vm_cache_release_ref((vm_cache_ref *)vnode->cache);
vnode->cache = NULL;
if (vnode->delete_me)
FS_CALL(vnode, remove_vnode)(vnode->mount->cookie, vnode->private_node, reenter);
else
@ -1417,24 +1417,30 @@ vfs_vnode_release_ref(void *vnode)
}
void *
vfs_get_cache_ptr(void *vnode)
extern "C" status_t
vfs_get_vnode_cache(void *_vnode, void **_cache)
{
return ((struct vnode *)vnode)->cache;
struct vnode *vnode = (struct vnode *)_vnode;
if (vnode->cache != NULL)
return B_OK;
mutex_lock(&sVnodeMutex);
status_t status = B_OK;
// The cache could have been created in the meantime
if (vnode->cache == NULL)
status = vm_create_vnode_cache(vnode, (void **)&vnode->cache);
else
*_cache = vnode->cache;
mutex_unlock(&sVnodeMutex);
return status;
}
int
vfs_set_cache_ptr(void *vnode, void *cache)
{
if (atomic_test_and_set((int32 *)&(((struct vnode *)vnode)->cache), (int32)cache, 0) == 0)
return 0;
return -1;
}
int
extern "C" int
vfs_get_vnode_from_fd(int fd, bool kernel, void **vnode)
{
*vnode = get_vnode_from_fd(fd, kernel);
@ -1446,7 +1452,7 @@ vfs_get_vnode_from_fd(int fd, bool kernel, void **vnode)
}
status_t
extern "C" status_t
vfs_get_vnode_from_path(const char *path, bool kernel, void **_vnode)
{
struct vnode *vnode;
@ -1466,6 +1472,13 @@ vfs_get_vnode_from_path(const char *path, bool kernel, void **_vnode)
}
extern "C" status_t
vfs_get_vnode(mount_id mountID, vnode_id vnodeID, void **_vnode)
{
return get_vnode(mountID, vnodeID, (struct vnode **)_vnode, true);
}
status_t
vfs_get_module_path(const char *basePath, const char *moduleName, char *pathBuffer,
size_t bufferSize)