* Reorganized the FS interface a little:
- Moved most file_system_module_info hooks into separate structures.
Those that operate on mounted volumes to fs_volume_ops, those
operating on a vnode to fs_vnode_ops.
- Got rid of the fs_volume, fs_cookie, fs_vnode typedefs. We use void*
again.
- Instead of a void* volume and node cookie hooks are passed a
fs_volume and fs_vnode structure pointer, which contain the cookie
and an ops pointer (fs_volume a few more things).
- The VFS {new,publish,get,...}_vnode() functions take a fs_volume*
instead of the volume ID. So does vfs_get_fs_node_from_path().
- Added type and flags arguments to publish_vnode() and the
get_vnode() hook and removed the type argument from lookup() hook.
Added vnode::type using formerly unused bits to store the node type.
Simplified a few things in the VFS due to the now always available
node type.
- Added fs_volume_ops::{create,delete}_sub_vnode() and
fs_vnode_ops::get_super_vnode() hooks. They are used to support file
system layers, e.g. allowing to extend an FS not supporting BeOS
attribute with attribute support. Needs some more work in the VFS.
- Added fs_vnode_ops::create_special_node() hook for creating special
nodes (e.g. FIFOs).
* Adjusted the built-in file systems and BFS according to the interface
changes. Removed all other FSs from the image for the time being.
We'll see whether further API changes are necessary before porting
them.
* Adjusted the bfs_shell accordingly.
* Implemented create_special_node() in rootfs to support special nodes.
* Added support for FIFOs:
- Added syscall _kern_create_fifo() (used by mkfifo()), which creates
a special node (type S_IFIFO) in the respective file system.
- When a special node is published the VFS creates a respective sub
node. Currently only FIFOs are supported.
- Added a little support for FIFO subnodes by using functionality from
the pipefs.
- Added mkfifo to the image. It can create FIFOs in the rootfs, but
the FIFOs aren't really usable ATM, since they still work like
pipes, i.e. readers and writers need to have them open at the same
time.
* Some smaller changes in the VFS:
- Made the *_CALL macros nicer to use (vargs).
- Refactored FS entry lookup into new function lookup_dir_entry().
- create_vnode() no longer just calls the FS create() hook. First it
looks up the entry and uses open_vnode(), if it already exists. This
is necessary for two reasons: 1) The FS might not support create()
while still allowing to open() entries. 2) When the FS has other
layers on to of it (or the respective node) it might not be
responsible for opening the node.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24816 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Ingo Weinhold
+204
-156
@@ -21,11 +21,6 @@ struct stat;
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struct fs_info;
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struct select_sync;
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/* the file system's private data structures */
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typedef void *fs_volume;
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typedef void *fs_cookie;
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typedef void *fs_vnode;
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/* additional flags passed to write_stat() (see NodeMonitor.h for the others) */
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// NOTE: Changing the constants here or in NodeMonitor.h will break
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// src/kits/storage/LibBeAdapter.cpp:_kern_write_stat().
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@@ -42,10 +37,199 @@ struct file_io_vec {
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#define B_CURRENT_FS_API_VERSION "/v1"
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// flags for publish_vnode() and fs_volume_ops::get_vnode()
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#define B_VNODE_PUBLISH_REMOVED 0x01
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#define B_VNODE_DONT_CREATE_SPECIAL_SUB_NODE 0x02
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct fs_volume fs_volume;
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typedef struct fs_volume_ops fs_volume_ops;
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typedef struct fs_vnode fs_vnode;
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typedef struct fs_vnode_ops fs_vnode_ops;
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struct fs_volume {
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dev_t id;
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int32 layer;
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void* private_volume;
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fs_volume_ops* ops;
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fs_volume* sub_volume;
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fs_volume* super_volume;
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};
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struct fs_vnode {
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void* private_node;
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fs_vnode_ops* ops;
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};
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struct fs_volume_ops {
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status_t (*unmount)(fs_volume *volume);
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status_t (*read_fs_info)(fs_volume *volume, struct fs_info *info);
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status_t (*write_fs_info)(fs_volume *volume, const struct fs_info *info,
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uint32 mask);
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status_t (*sync)(fs_volume *volume);
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status_t (*get_vnode)(fs_volume *volume, ino_t id, fs_vnode *vnode,
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int *_type, uint32 *_flags, bool reenter);
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/* index directory & index operations */
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status_t (*open_index_dir)(fs_volume *volume, void **cookie);
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status_t (*close_index_dir)(fs_volume *volume, void *cookie);
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status_t (*free_index_dir_cookie)(fs_volume *volume, void *cookie);
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status_t (*read_index_dir)(fs_volume *volume, void *cookie,
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struct dirent *buffer, size_t bufferSize, uint32 *_num);
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status_t (*rewind_index_dir)(fs_volume *volume, void *cookie);
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status_t (*create_index)(fs_volume *volume, const char *name, uint32 type,
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uint32 flags);
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status_t (*remove_index)(fs_volume *volume, const char *name);
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status_t (*read_index_stat)(fs_volume *volume, const char *name,
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struct stat *stat);
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/* query operations */
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status_t (*open_query)(fs_volume *volume, const char *query, uint32 flags,
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port_id port, uint32 token, void **_cookie);
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status_t (*close_query)(fs_volume *volume, void *cookie);
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status_t (*free_query_cookie)(fs_volume *volume, void *cookie);
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status_t (*read_query)(fs_volume *volume, void *cookie,
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struct dirent *buffer, size_t bufferSize, uint32 *_num);
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status_t (*rewind_query)(fs_volume *volume, void *cookie);
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/* support for FS layers */
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status_t (*create_sub_vnode)(fs_volume *volume, ino_t id, fs_vnode *vnode);
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status_t (*delete_sub_vnode)(fs_volume *volume, fs_vnode *vnode);
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};
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struct fs_vnode_ops {
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/* vnode operations */
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status_t (*lookup)(fs_volume *volume, fs_vnode *dir, const char *name,
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ino_t *_id);
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status_t (*get_vnode_name)(fs_volume *volume, fs_vnode *vnode, char *buffer,
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size_t bufferSize);
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status_t (*put_vnode)(fs_volume *volume, fs_vnode *vnode, bool reenter);
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status_t (*remove_vnode)(fs_volume *volume, fs_vnode *vnode, bool reenter);
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/* VM file access */
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bool (*can_page)(fs_volume *volume, fs_vnode *vnode, void *cookie);
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status_t (*read_pages)(fs_volume *volume, fs_vnode *vnode, void *cookie,
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off_t pos, const iovec *vecs, size_t count, size_t *_numBytes,
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bool reenter);
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status_t (*write_pages)(fs_volume *volume, fs_vnode *vnode,
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void *cookie, off_t pos, const iovec *vecs, size_t count,
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size_t *_numBytes, bool reenter);
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/* cache file access */
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status_t (*get_file_map)(fs_volume *volume, fs_vnode *vnode, off_t offset,
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size_t size, struct file_io_vec *vecs, size_t *_count);
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/* common operations */
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status_t (*ioctl)(fs_volume *volume, fs_vnode *vnode, void *cookie,
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ulong op, void *buffer, size_t length);
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status_t (*set_flags)(fs_volume *volume, fs_vnode *vnode, void *cookie,
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int flags);
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status_t (*select)(fs_volume *volume, fs_vnode *vnode, void *cookie,
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uint8 event, uint32 ref, selectsync *sync);
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status_t (*deselect)(fs_volume *volume, fs_vnode *vnode, void *cookie,
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uint8 event, selectsync *sync);
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status_t (*fsync)(fs_volume *volume, fs_vnode *vnode);
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status_t (*read_symlink)(fs_volume *volume, fs_vnode *link, char *buffer,
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size_t *_bufferSize);
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status_t (*create_symlink)(fs_volume *volume, fs_vnode *dir,
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const char *name, const char *path, int mode);
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status_t (*link)(fs_volume *volume, fs_vnode *dir, const char *name,
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fs_vnode *vnode);
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status_t (*unlink)(fs_volume *volume, fs_vnode *dir, const char *name);
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status_t (*rename)(fs_volume *volume, fs_vnode *fromDir,
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const char *fromName, fs_vnode *toDir, const char *toName);
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status_t (*access)(fs_volume *volume, fs_vnode *vnode, int mode);
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status_t (*read_stat)(fs_volume *volume, fs_vnode *vnode,
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struct stat *stat);
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status_t (*write_stat)(fs_volume *volume, fs_vnode *vnode,
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const struct stat *stat, uint32 statMask);
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/* file operations */
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status_t (*create)(fs_volume *volume, fs_vnode *dir, const char *name,
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int openMode, int perms, void **_cookie,
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ino_t *_newVnodeID);
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status_t (*open)(fs_volume *volume, fs_vnode *vnode, int openMode,
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void **_cookie);
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status_t (*close)(fs_volume *volume, fs_vnode *vnode, void *cookie);
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status_t (*free_cookie)(fs_volume *volume, fs_vnode *vnode,
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void *cookie);
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status_t (*read)(fs_volume *volume, fs_vnode *vnode, void *cookie,
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off_t pos, void *buffer, size_t *length);
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status_t (*write)(fs_volume *volume, fs_vnode *vnode, void *cookie,
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off_t pos, const void *buffer, size_t *length);
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/* directory operations */
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status_t (*create_dir)(fs_volume *volume, fs_vnode *parent,
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const char *name, int perms, ino_t *_newVnodeID);
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status_t (*remove_dir)(fs_volume *volume, fs_vnode *parent,
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const char *name);
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status_t (*open_dir)(fs_volume *volume, fs_vnode *vnode,
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void **_cookie);
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status_t (*close_dir)(fs_volume *volume, fs_vnode *vnode, void *cookie);
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status_t (*free_dir_cookie)(fs_volume *volume, fs_vnode *vnode,
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void *cookie);
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status_t (*read_dir)(fs_volume *volume, fs_vnode *vnode, void *cookie,
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struct dirent *buffer, size_t bufferSize, uint32 *_num);
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status_t (*rewind_dir)(fs_volume *volume, fs_vnode *vnode,
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void *cookie);
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/* attribute directory operations */
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status_t (*open_attr_dir)(fs_volume *volume, fs_vnode *vnode,
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void **_cookie);
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status_t (*close_attr_dir)(fs_volume *volume, fs_vnode *vnode,
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void *cookie);
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status_t (*free_attr_dir_cookie)(fs_volume *volume, fs_vnode *vnode,
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void *cookie);
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status_t (*read_attr_dir)(fs_volume *volume, fs_vnode *vnode,
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void *cookie, struct dirent *buffer, size_t bufferSize,
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uint32 *_num);
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status_t (*rewind_attr_dir)(fs_volume *volume, fs_vnode *vnode,
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void *cookie);
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/* attribute operations */
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status_t (*create_attr)(fs_volume *volume, fs_vnode *vnode,
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const char *name, uint32 type, int openMode,
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void **_cookie);
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status_t (*open_attr)(fs_volume *volume, fs_vnode *vnode, const char *name,
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int openMode, void **_cookie);
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status_t (*close_attr)(fs_volume *volume, fs_vnode *vnode,
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void *cookie);
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status_t (*free_attr_cookie)(fs_volume *volume, fs_vnode *vnode,
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void *cookie);
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status_t (*read_attr)(fs_volume *volume, fs_vnode *vnode, void *cookie,
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off_t pos, void *buffer, size_t *length);
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status_t (*write_attr)(fs_volume *volume, fs_vnode *vnode, void *cookie,
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off_t pos, const void *buffer, size_t *length);
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status_t (*read_attr_stat)(fs_volume *volume, fs_vnode *vnode,
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void *cookie, struct stat *stat);
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status_t (*write_attr_stat)(fs_volume *volume, fs_vnode *vnode,
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void *cookie, const struct stat *stat, int statMask);
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status_t (*rename_attr)(fs_volume *volume, fs_vnode *fromVnode,
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const char *fromName, fs_vnode *toVnode, const char *toName);
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status_t (*remove_attr)(fs_volume *volume, fs_vnode *vnode,
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const char *name);
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/* support for node and FS layers */
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status_t (*create_special_node)(fs_volume *volume, fs_vnode *dir,
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const char *name, fs_vnode *subVnode, mode_t mode, uint32 flags,
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fs_vnode *_superVnode, ino_t *_nodeID);
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status_t (*get_super_vnode)(fs_volume *volume, fs_vnode *vnode,
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fs_volume *superVolume, fs_vnode *superVnode);
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};
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typedef struct file_system_module_info {
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struct module_info info;
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const char* pretty_name;
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@@ -61,142 +245,8 @@ typedef struct file_system_module_info {
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void (*free_partition_content_cookie)(partition_data *partition);
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/* general operations */
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status_t (*mount)(dev_t id, const char *device, uint32 flags,
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const char *args, fs_volume *_fs, ino_t *_rootVnodeID);
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status_t (*unmount)(fs_volume fs);
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status_t (*read_fs_info)(fs_volume fs, struct fs_info *info);
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status_t (*write_fs_info)(fs_volume fs, const struct fs_info *info,
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uint32 mask);
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status_t (*sync)(fs_volume fs);
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/* vnode operations */
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status_t (*lookup)(fs_volume fs, fs_vnode dir, const char *name,
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ino_t *_id, int *_type);
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status_t (*get_vnode_name)(fs_volume fs, fs_vnode vnode, char *buffer,
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size_t bufferSize);
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status_t (*get_vnode)(fs_volume fs, ino_t id, fs_vnode *_vnode,
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bool reenter);
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status_t (*put_vnode)(fs_volume fs, fs_vnode vnode, bool reenter);
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status_t (*remove_vnode)(fs_volume fs, fs_vnode vnode, bool reenter);
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/* VM file access */
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bool (*can_page)(fs_volume fs, fs_vnode vnode, fs_cookie cookie);
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status_t (*read_pages)(fs_volume fs, fs_vnode vnode, fs_cookie cookie,
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off_t pos, const iovec *vecs, size_t count, size_t *_numBytes,
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bool reenter);
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status_t (*write_pages)(fs_volume fs, fs_vnode vnode, fs_cookie cookie,
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off_t pos, const iovec *vecs, size_t count, size_t *_numBytes,
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bool reenter);
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/* cache file access */
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status_t (*get_file_map)(fs_volume fs, fs_vnode vnode, off_t offset,
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size_t size, struct file_io_vec *vecs, size_t *_count);
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|
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/* common operations */
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status_t (*ioctl)(fs_volume fs, fs_vnode vnode, fs_cookie cookie, ulong op,
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void *buffer, size_t length);
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status_t (*set_flags)(fs_volume fs, fs_vnode vnode, fs_cookie cookie,
|
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int flags);
|
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status_t (*select)(fs_volume fs, fs_vnode vnode, fs_cookie cookie,
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uint8 event, uint32 ref, selectsync *sync);
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status_t (*deselect)(fs_volume fs, fs_vnode vnode, fs_cookie cookie,
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uint8 event, selectsync *sync);
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status_t (*fsync)(fs_volume fs, fs_vnode vnode);
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status_t (*read_symlink)(fs_volume fs, fs_vnode link, char *buffer,
|
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size_t *_bufferSize);
|
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status_t (*create_symlink)(fs_volume fs, fs_vnode dir, const char *name,
|
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const char *path, int mode);
|
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|
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status_t (*link)(fs_volume fs, fs_vnode dir, const char *name,
|
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fs_vnode vnode);
|
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status_t (*unlink)(fs_volume fs, fs_vnode dir, const char *name);
|
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status_t (*rename)(fs_volume fs, fs_vnode fromDir, const char *fromName,
|
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fs_vnode toDir, const char *toName);
|
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|
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status_t (*access)(fs_volume fs, fs_vnode vnode, int mode);
|
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status_t (*read_stat)(fs_volume fs, fs_vnode vnode, struct stat *stat);
|
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status_t (*write_stat)(fs_volume fs, fs_vnode vnode,
|
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const struct stat *stat, uint32 statMask);
|
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|
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/* file operations */
|
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status_t (*create)(fs_volume fs, fs_vnode dir, const char *name,
|
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int openMode, int perms, fs_cookie *_cookie,
|
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ino_t *_newVnodeID);
|
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status_t (*open)(fs_volume fs, fs_vnode vnode, int openMode,
|
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fs_cookie *_cookie);
|
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status_t (*close)(fs_volume fs, fs_vnode vnode, fs_cookie cookie);
|
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status_t (*free_cookie)(fs_volume fs, fs_vnode vnode, fs_cookie cookie);
|
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status_t (*read)(fs_volume fs, fs_vnode vnode, fs_cookie cookie, off_t pos,
|
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void *buffer, size_t *length);
|
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status_t (*write)(fs_volume fs, fs_vnode vnode, fs_cookie cookie, off_t pos,
|
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const void *buffer, size_t *length);
|
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|
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/* directory operations */
|
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status_t (*create_dir)(fs_volume fs, fs_vnode parent, const char *name,
|
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int perms, ino_t *_newVnodeID);
|
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status_t (*remove_dir)(fs_volume fs, fs_vnode parent, const char *name);
|
||||
status_t (*open_dir)(fs_volume fs, fs_vnode vnode, fs_cookie *_cookie);
|
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status_t (*close_dir)(fs_volume fs, fs_vnode vnode, fs_cookie cookie);
|
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status_t (*free_dir_cookie)(fs_volume fs, fs_vnode vnode, fs_cookie cookie);
|
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status_t (*read_dir)(fs_volume fs, fs_vnode vnode, fs_cookie cookie,
|
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struct dirent *buffer, size_t bufferSize, uint32 *_num);
|
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status_t (*rewind_dir)(fs_volume fs, fs_vnode vnode, fs_cookie cookie);
|
||||
|
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/* attribute directory operations */
|
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status_t (*open_attr_dir)(fs_volume fs, fs_vnode vnode, fs_cookie *_cookie);
|
||||
status_t (*close_attr_dir)(fs_volume fs, fs_vnode vnode, fs_cookie cookie);
|
||||
status_t (*free_attr_dir_cookie)(fs_volume fs, fs_vnode vnode,
|
||||
fs_cookie cookie);
|
||||
status_t (*read_attr_dir)(fs_volume fs, fs_vnode vnode, fs_cookie cookie,
|
||||
struct dirent *buffer, size_t bufferSize, uint32 *_num);
|
||||
status_t (*rewind_attr_dir)(fs_volume fs, fs_vnode vnode, fs_cookie cookie);
|
||||
|
||||
/* attribute operations */
|
||||
status_t (*create_attr)(fs_volume fs, fs_vnode vnode, const char *name,
|
||||
uint32 type, int openMode, fs_cookie *_cookie);
|
||||
status_t (*open_attr)(fs_volume fs, fs_vnode vnode, const char *name,
|
||||
int openMode, fs_cookie *_cookie);
|
||||
status_t (*close_attr)(fs_volume fs, fs_vnode vnode, fs_cookie cookie);
|
||||
status_t (*free_attr_cookie)(fs_volume fs, fs_vnode vnode,
|
||||
fs_cookie cookie);
|
||||
status_t (*read_attr)(fs_volume fs, fs_vnode vnode, fs_cookie cookie,
|
||||
off_t pos, void *buffer, size_t *length);
|
||||
status_t (*write_attr)(fs_volume fs, fs_vnode vnode, fs_cookie cookie,
|
||||
off_t pos, const void *buffer, size_t *length);
|
||||
|
||||
status_t (*read_attr_stat)(fs_volume fs, fs_vnode vnode, fs_cookie cookie,
|
||||
struct stat *stat);
|
||||
status_t (*write_attr_stat)(fs_volume fs, fs_vnode vnode, fs_cookie cookie,
|
||||
const struct stat *stat, int statMask);
|
||||
status_t (*rename_attr)(fs_volume fs, fs_vnode fromVnode,
|
||||
const char *fromName, fs_vnode toVnode, const char *toName);
|
||||
status_t (*remove_attr)(fs_volume fs, fs_vnode vnode, const char *name);
|
||||
|
||||
/* index directory & index operations */
|
||||
status_t (*open_index_dir)(fs_volume fs, fs_cookie *cookie);
|
||||
status_t (*close_index_dir)(fs_volume fs, fs_cookie cookie);
|
||||
status_t (*free_index_dir_cookie)(fs_volume fs, fs_cookie cookie);
|
||||
status_t (*read_index_dir)(fs_volume fs, fs_cookie cookie,
|
||||
struct dirent *buffer, size_t bufferSize, uint32 *_num);
|
||||
status_t (*rewind_index_dir)(fs_volume fs, fs_cookie cookie);
|
||||
|
||||
status_t (*create_index)(fs_volume fs, const char *name, uint32 type,
|
||||
uint32 flags);
|
||||
status_t (*remove_index)(fs_volume fs, const char *name);
|
||||
status_t (*read_index_stat)(fs_volume fs, const char *name,
|
||||
struct stat *stat);
|
||||
|
||||
/* query operations */
|
||||
status_t (*open_query)(fs_volume fs, const char *query, uint32 flags,
|
||||
port_id port, uint32 token, fs_cookie *_cookie);
|
||||
status_t (*close_query)(fs_volume fs, fs_cookie cookie);
|
||||
status_t (*free_query_cookie)(fs_volume fs, fs_cookie cookie);
|
||||
status_t (*read_query)(fs_volume fs, fs_cookie cookie,
|
||||
struct dirent *buffer, size_t bufferSize, uint32 *_num);
|
||||
status_t (*rewind_query)(fs_volume fs, fs_cookie cookie);
|
||||
status_t (*mount)(fs_volume *volume, const char *device, uint32 flags,
|
||||
const char *args, ino_t *_rootVnodeID);
|
||||
|
||||
/* capability querying (the device is read locked) */
|
||||
uint32 (*get_supported_operations)(partition_data* partition, uint32 mask);
|
||||
@@ -233,17 +283,19 @@ typedef struct file_system_module_info {
|
||||
|
||||
|
||||
/* file system add-ons only prototypes */
|
||||
extern status_t new_vnode(dev_t mountID, ino_t vnodeID,
|
||||
fs_vnode privateNode);
|
||||
extern status_t publish_vnode(dev_t mountID, ino_t vnodeID,
|
||||
fs_vnode privateNode);
|
||||
extern status_t get_vnode(dev_t mountID, ino_t vnodeID,
|
||||
fs_vnode *_privateNode);
|
||||
extern status_t put_vnode(dev_t mountID, ino_t vnodeID);
|
||||
extern status_t remove_vnode(dev_t mountID, ino_t vnodeID);
|
||||
extern status_t unremove_vnode(dev_t mountID, ino_t vnodeID);
|
||||
extern status_t get_vnode_removed(dev_t mountID, ino_t vnodeID,
|
||||
bool* removed);
|
||||
extern status_t new_vnode(fs_volume *volume, ino_t vnodeID, void *privateNode,
|
||||
fs_vnode_ops *ops);
|
||||
extern status_t publish_vnode(fs_volume *volume, ino_t vnodeID,
|
||||
void *privateNode, fs_vnode_ops *ops, int type,
|
||||
uint32 flags);
|
||||
extern status_t get_vnode(fs_volume *volume, ino_t vnodeID,
|
||||
void **_privateNode);
|
||||
extern status_t put_vnode(fs_volume *volume, ino_t vnodeID);
|
||||
extern status_t remove_vnode(fs_volume *volume, ino_t vnodeID);
|
||||
extern status_t unremove_vnode(fs_volume *volume, ino_t vnodeID);
|
||||
extern status_t get_vnode_removed(fs_volume *volume, ino_t vnodeID,
|
||||
bool *removed);
|
||||
|
||||
extern status_t read_pages(int fd, off_t pos, const struct iovec *vecs,
|
||||
size_t count, size_t *_numBytes, bool fsReenter);
|
||||
extern status_t write_pages(int fd, off_t pos, const struct iovec *vecs,
|
||||
@@ -257,10 +309,6 @@ extern status_t write_file_io_vec_pages(int fd,
|
||||
const struct iovec *vecs, size_t vecCount,
|
||||
uint32 *_vecIndex, size_t *_vecOffset, size_t *_bytes);
|
||||
|
||||
// Deprecated! Will disappear soon!
|
||||
extern status_t notify_listener(int op, dev_t device, ino_t parentNode,
|
||||
ino_t toParentNode, ino_t node, const char *name);
|
||||
|
||||
extern status_t notify_entry_created(dev_t device, ino_t directory,
|
||||
const char *name, ino_t node);
|
||||
extern status_t notify_entry_removed(dev_t device, ino_t directory,
|
||||
|
||||
Reference in New Issue
Block a user