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We analyze a client FS's capabilities -- i.e. which hooks it provides or

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can be emulated -- and pass this info to the kernel add-on. Thus we can
avoid passing requests to the userland that can't be serviced anyway.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20331 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Ingo Weinhold
2007-03-05 05:16:08 +00:00
parent cf4ccd6575
commit 4e0e80ed6c
13 changed files with 629 additions and 19 deletions
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src/add-ons/kernel/file_systems/userlandfs/server/BeOSKernelFileSystem.cpp
+113
View File
@@ -4,6 +4,7 @@
#include <new>
#include "beos_fs_interface.h"
#include "BeOSKernelVolume.h"
using std::nothrow;
@@ -13,6 +14,7 @@ BeOSKernelFileSystem::BeOSKernelFileSystem(beos_vnode_ops* fsOps)
: FileSystem(),
fFSOps(fsOps)
{
_InitCapabilities(fsOps);
}
// destructor
@@ -45,3 +47,114 @@ BeOSKernelFileSystem::DeleteVolume(Volume* volume)
return B_OK;
}
// _InitCapabilities
void
BeOSKernelFileSystem::_InitCapabilities(beos_vnode_ops* fsOps)
{
fCapabilities.ClearAll();
// FS interface type
fCapabilities.clientFSType = CLIENT_FS_BEOS_KERNEL;
// FS operations
fCapabilities.Set(FS_CAPABILITY_MOUNT, fsOps->mount);
fCapabilities.Set(FS_CAPABILITY_UNMOUNT, fsOps->unmount);
fCapabilities.Set(FS_CAPABILITY_READ_FS_INFO, fsOps->rfsstat);
fCapabilities.Set(FS_CAPABILITY_WRITE_FS_INFO, fsOps->wfsstat);
fCapabilities.Set(FS_CAPABILITY_SYNC, fsOps->sync);
// vnode operations
fCapabilities.Set(FS_CAPABILITY_LOOKUP, fsOps->walk);
// missing: FS_CAPABILITY_GET_VNODE_NAME,
fCapabilities.Set(FS_CAPABILITY_GET_VNODE, fsOps->read_vnode);
fCapabilities.Set(FS_CAPABILITY_PUT_VNODE, fsOps->write_vnode);
fCapabilities.Set(FS_CAPABILITY_REMOVE_VNODE, fsOps->remove_vnode);
// VM file access
// missing: FS_CAPABILITY_CAN_PAGE,
// missing: FS_CAPABILITY_READ_PAGES,
// missing: FS_CAPABILITY_WRITE_PAGES,
// cache file access
// missing: FS_CAPABILITY_GET_FILE_MAP,
// common operations
fCapabilities.Set(FS_CAPABILITY_IOCTL, fsOps->ioctl);
fCapabilities.Set(FS_CAPABILITY_SET_FLAGS, fsOps->setflags);
fCapabilities.Set(FS_CAPABILITY_SELECT, fsOps->select);
fCapabilities.Set(FS_CAPABILITY_DESELECT, fsOps->deselect);
fCapabilities.Set(FS_CAPABILITY_FSYNC, fsOps->fsync);
fCapabilities.Set(FS_CAPABILITY_READ_SYMLINK, fsOps->readlink);
fCapabilities.Set(FS_CAPABILITY_CREATE_SYMLINK, fsOps->symlink);
fCapabilities.Set(FS_CAPABILITY_LINK, fsOps->link);
fCapabilities.Set(FS_CAPABILITY_UNLINK, fsOps->unlink);
fCapabilities.Set(FS_CAPABILITY_RENAME, fsOps->rename);
fCapabilities.Set(FS_CAPABILITY_ACCESS, fsOps->access);
fCapabilities.Set(FS_CAPABILITY_READ_STAT, fsOps->rstat);
fCapabilities.Set(FS_CAPABILITY_WRITE_STAT, fsOps->wstat);
// file operations
fCapabilities.Set(FS_CAPABILITY_CREATE, fsOps->create);
fCapabilities.Set(FS_CAPABILITY_OPEN, fsOps->open);
fCapabilities.Set(FS_CAPABILITY_CLOSE, fsOps->close);
fCapabilities.Set(FS_CAPABILITY_FREE_COOKIE, fsOps->free_cookie);
fCapabilities.Set(FS_CAPABILITY_READ, fsOps->read);
fCapabilities.Set(FS_CAPABILITY_WRITE, fsOps->write);
// directory operations
fCapabilities.Set(FS_CAPABILITY_CREATE_DIR, fsOps->mkdir);
fCapabilities.Set(FS_CAPABILITY_REMOVE_DIR, fsOps->rmdir);
fCapabilities.Set(FS_CAPABILITY_OPEN_DIR, fsOps->opendir);
fCapabilities.Set(FS_CAPABILITY_CLOSE_DIR, fsOps->closedir);
fCapabilities.Set(FS_CAPABILITY_FREE_DIR_COOKIE, fsOps->free_dircookie);
fCapabilities.Set(FS_CAPABILITY_READ_DIR, fsOps->readdir);
fCapabilities.Set(FS_CAPABILITY_REWIND_DIR, fsOps->rewinddir);
// attribute directory operations
fCapabilities.Set(FS_CAPABILITY_OPEN_ATTR_DIR, fsOps->open_attrdir);
fCapabilities.Set(FS_CAPABILITY_CLOSE_ATTR_DIR, fsOps->close_attrdir);
fCapabilities.Set(FS_CAPABILITY_FREE_ATTR_DIR_COOKIE,
fsOps->free_attrdircookie);
fCapabilities.Set(FS_CAPABILITY_READ_ATTR_DIR, fsOps->read_attrdir);
fCapabilities.Set(FS_CAPABILITY_REWIND_ATTR_DIR, fsOps->rewind_attrdir);
// attribute operations
// we emulate open_attr() and free_attr_dir_cookie() if either read_attr()
// or write_attr() is present
bool hasAttributes = (fsOps->read_attr || fsOps->write_attr);
fCapabilities.Set(FS_CAPABILITY_CREATE_ATTR, hasAttributes);
fCapabilities.Set(FS_CAPABILITY_OPEN_ATTR, hasAttributes);
fCapabilities.Set(FS_CAPABILITY_CLOSE_ATTR, false);
fCapabilities.Set(FS_CAPABILITY_FREE_ATTR_COOKIE, hasAttributes);
fCapabilities.Set(FS_CAPABILITY_READ_ATTR, fsOps->read_attr);
fCapabilities.Set(FS_CAPABILITY_WRITE_ATTR, fsOps->write_attr);
fCapabilities.Set(FS_CAPABILITY_READ_ATTR_STAT, fsOps->stat_attr);
// missing: FS_CAPABILITY_WRITE_ATTR_STAT
fCapabilities.Set(FS_CAPABILITY_RENAME_ATTR, fsOps->rename_attr);
fCapabilities.Set(FS_CAPABILITY_REMOVE_ATTR, fsOps->remove_attr);
// index directory & index operations
fCapabilities.Set(FS_CAPABILITY_OPEN_INDEX_DIR, fsOps->open_indexdir);
fCapabilities.Set(FS_CAPABILITY_CLOSE_INDEX_DIR, fsOps->close_indexdir);
fCapabilities.Set(FS_CAPABILITY_FREE_INDEX_DIR_COOKIE,
fsOps->free_indexdircookie);
fCapabilities.Set(FS_CAPABILITY_READ_INDEX_DIR, fsOps->read_indexdir);
fCapabilities.Set(FS_CAPABILITY_REWIND_INDEX_DIR, fsOps->rewind_indexdir);
fCapabilities.Set(FS_CAPABILITY_CREATE_INDEX, fsOps->create_index);
fCapabilities.Set(FS_CAPABILITY_REMOVE_INDEX, fsOps->remove_index);
fCapabilities.Set(FS_CAPABILITY_READ_INDEX_STAT, fsOps->stat_index);
// query operations
fCapabilities.Set(FS_CAPABILITY_OPEN_QUERY, fsOps->open_query);
fCapabilities.Set(FS_CAPABILITY_CLOSE_QUERY, fsOps->close_query);
fCapabilities.Set(FS_CAPABILITY_FREE_QUERY_COOKIE, fsOps->free_querycookie);
fCapabilities.Set(FS_CAPABILITY_READ_QUERY, fsOps->read_query);
// missing: FS_CAPABILITY_REWIND_QUERY,
}