chrislu
3 years ago
8 changed files with 242 additions and 126 deletions
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16weed/mount/filehandle.go
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79weed/mount/filehandle_map.go
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1weed/mount/inode_to_path.go
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2weed/mount/weedfs.go
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131weed/mount/weedfs_file_io.go
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34weed/mount/weedfs_file_read.go
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70weed/mount/weedfs_file_sync.go
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35weed/mount/weedfs_file_write.go
@ -0,0 +1,16 @@ |
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package mount |
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import "github.com/hanwen/go-fuse/v2/fuse" |
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func (wfs *WFS) AcquireHandle(inode uint64, uid, gid uint32) (fileHandle *FileHandle, code fuse.Status) { |
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_, entry, status := wfs.maybeReadEntry(inode) |
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if status == fuse.OK { |
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fileHandle = wfs.fhmap.GetFileHandle(inode) |
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fileHandle.entry = entry |
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} |
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return |
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} |
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func (wfs *WFS) ReleaseHandle(handleId FileHandleId) { |
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wfs.fhmap.ReleaseByHandle(handleId) |
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} |
@ -0,0 +1,79 @@ |
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package mount |
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import ( |
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"github.com/chrislusf/seaweedfs/weed/pb/filer_pb" |
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"sync" |
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) |
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type FileHandleId uint64 |
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type FileHandleToInode struct { |
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sync.RWMutex |
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nextFh FileHandleId |
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inode2fh map[uint64]*FileHandle |
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fh2inode map[FileHandleId]uint64 |
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} |
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type FileHandle struct { |
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fh FileHandleId |
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counter int64 |
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entry *filer_pb.Entry |
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inode uint64 |
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} |
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func NewFileHandleToInode() *FileHandleToInode { |
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return &FileHandleToInode{ |
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inode2fh: make(map[uint64]*FileHandle), |
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fh2inode: make(map[FileHandleId]uint64), |
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nextFh: 0, |
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} |
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} |
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func (i *FileHandleToInode) GetFileHandle(inode uint64) *FileHandle { |
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i.Lock() |
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defer i.Unlock() |
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fh, found := i.inode2fh[inode] |
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if !found { |
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fh = &FileHandle{ |
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fh: i.nextFh, |
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counter: 1, |
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inode: inode, |
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} |
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i.nextFh++ |
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i.inode2fh[inode] = fh |
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i.fh2inode[fh.fh] = inode |
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} else { |
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fh.counter++ |
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} |
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return fh |
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} |
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func (i *FileHandleToInode) ReleaseByInode(inode uint64) { |
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i.Lock() |
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defer i.Unlock() |
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fh, found := i.inode2fh[inode] |
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if found { |
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fh.counter-- |
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if fh.counter <= 0 { |
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delete(i.inode2fh, inode) |
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delete(i.fh2inode, fh.fh) |
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} |
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} |
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} |
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func (i *FileHandleToInode) ReleaseByHandle(fh FileHandleId) { |
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i.Lock() |
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defer i.Unlock() |
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inode, found := i.fh2inode[fh] |
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if found { |
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fhHandle, fhFound := i.inode2fh[inode] |
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if !fhFound { |
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delete(i.fh2inode, fh) |
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} else { |
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fhHandle.counter-- |
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if fhHandle.counter <= 0 { |
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delete(i.inode2fh, inode) |
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delete(i.fh2inode, fhHandle.fh) |
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} |
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} |
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} |
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} |
@ -0,0 +1,34 @@ |
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package mount |
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import ( |
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"github.com/hanwen/go-fuse/v2/fuse" |
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) |
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/** |
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* Read data |
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* |
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* Read should send exactly the number of bytes requested except |
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* on EOF or error, otherwise the rest of the data will be |
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* substituted with zeroes. An exception to this is when the file |
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* has been opened in 'direct_io' mode, in which case the return |
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* value of the read system call will reflect the return value of |
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* this operation. |
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* |
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* fi->fh will contain the value set by the open method, or will |
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* be undefined if the open method didn't set any value. |
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* |
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* Valid replies: |
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* fuse_reply_buf |
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* fuse_reply_iov |
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* fuse_reply_data |
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* fuse_reply_err |
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* |
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* @param req request handle |
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* @param ino the inode number |
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* @param size number of bytes to read |
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* @param off offset to read from |
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* @param fi file information |
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*/ |
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func (wfs *WFS) Read(cancel <-chan struct{}, in *fuse.ReadIn, buf []byte) (fuse.ReadResult, fuse.Status) { |
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return nil, fuse.ENOSYS |
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} |
@ -0,0 +1,70 @@ |
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package mount |
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import ( |
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"github.com/hanwen/go-fuse/v2/fuse" |
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) |
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/** |
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* Flush method |
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* |
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* This is called on each close() of the opened file. |
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* |
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* Since file descriptors can be duplicated (dup, dup2, fork), for |
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* one open call there may be many flush calls. |
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* |
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* Filesystems shouldn't assume that flush will always be called |
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* after some writes, or that if will be called at all. |
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* |
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* fi->fh will contain the value set by the open method, or will |
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* be undefined if the open method didn't set any value. |
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* |
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* NOTE: the name of the method is misleading, since (unlike |
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* fsync) the filesystem is not forced to flush pending writes. |
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* One reason to flush data is if the filesystem wants to return |
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* write errors during close. However, such use is non-portable |
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* because POSIX does not require [close] to wait for delayed I/O to |
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* complete. |
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* |
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* If the filesystem supports file locking operations (setlk, |
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* getlk) it should remove all locks belonging to 'fi->owner'. |
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* |
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* If this request is answered with an error code of ENOSYS, |
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* this is treated as success and future calls to flush() will |
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* succeed automatically without being send to the filesystem |
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* process. |
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* |
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* Valid replies: |
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* fuse_reply_err |
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* |
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* @param req request handle |
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* @param ino the inode number |
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* @param fi file information |
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* |
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* [close]: http://pubs.opengroup.org/onlinepubs/9699919799/functions/close.html
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*/ |
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func (wfs *WFS) Flush(cancel <-chan struct{}, in *fuse.FlushIn) fuse.Status { |
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return fuse.ENOSYS |
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} |
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/** |
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* Synchronize file contents |
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* |
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* If the datasync parameter is non-zero, then only the user data |
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* should be flushed, not the meta data. |
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* |
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* If this request is answered with an error code of ENOSYS, |
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* this is treated as success and future calls to fsync() will |
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* succeed automatically without being send to the filesystem |
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* process. |
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* |
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* Valid replies: |
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* fuse_reply_err |
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* |
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* @param req request handle |
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* @param ino the inode number |
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* @param datasync flag indicating if only data should be flushed |
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* @param fi file information |
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*/ |
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func (wfs *WFS) Fsync(cancel <-chan struct{}, in *fuse.FsyncIn) (code fuse.Status) { |
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return fuse.ENOSYS |
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} |
@ -0,0 +1,35 @@ |
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package mount |
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import ( |
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"github.com/hanwen/go-fuse/v2/fuse" |
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) |
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/** |
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* Write data |
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* |
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* Write should return exactly the number of bytes requested |
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* except on error. An exception to this is when the file has |
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* been opened in 'direct_io' mode, in which case the return value |
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* of the write system call will reflect the return value of this |
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* operation. |
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* |
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* Unless FUSE_CAP_HANDLE_KILLPRIV is disabled, this method is |
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* expected to reset the setuid and setgid bits. |
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* |
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* fi->fh will contain the value set by the open method, or will |
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* be undefined if the open method didn't set any value. |
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* |
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* Valid replies: |
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* fuse_reply_write |
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* fuse_reply_err |
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* |
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* @param req request handle |
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* @param ino the inode number |
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* @param buf data to write |
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* @param size number of bytes to write |
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* @param off offset to write to |
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* @param fi file information |
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*/ |
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func (wfs *WFS) Write(cancel <-chan struct{}, in *fuse.WriteIn, data []byte) (written uint32, code fuse.Status) { |
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return 0, fuse.ENOSYS |
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} |
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