d4566d4aaa
* compare chunks by timestamp * fix slab clearing error * fix test compilation * move oldest chunk to sealed, instead of by fullness * lock on fh.entryViewCache * remove verbose logs * revert slat clearing * less logs * less logs * track write and read by timestamp * remove useless logic * add entry lock on file handle release * use mem chunk only, swap file chunk has problems * comment out code that maybe used later * add debug mode to compare data read and write * more efficient readResolvedChunks with linked list * small optimization * fix test compilation * minor fix on writer * add SeparateGarbageChunks * group chunks into sections * turn off debug mode * fix tests * fix tests * tmp enable swap file chunk * Revert "tmp enable swap file chunk" This reverts commit 985137ec472924e4815f258189f6ca9f2168a0a7. * simple refactoring * simple refactoring * do not re-use swap file chunk. Sealed chunks should not be re-used. * comment out debugging facilities * either mem chunk or swap file chunk is fine now * remove orderedMutex as *semaphore.Weighted not found impactful * optimize size calculation for changing large files * optimize performance to avoid going through the long list of chunks * still problems with swap file chunk * rename * tiny optimization * swap file chunk save only successfully read data * fix * enable both mem and swap file chunk * resolve chunks with range * rename * fix chunk interval list * also change file handle chunk group when adding chunks * pick in-active chunk with time-decayed counter * fix compilation * avoid nil with empty fh.entry * refactoring * rename * rename * refactor visible intervals to *list.List * refactor chunkViews to *list.List * add IntervalList for generic interval list * change visible interval to use IntervalList in generics * cahnge chunkViews to *IntervalList[*ChunkView] * use NewFileChunkSection to create * rename variables * refactor * fix renaming leftover * renaming * renaming * add insert interval * interval list adds lock * incrementally add chunks to readers Fixes: 1. set start and stop offset for the value object 2. clone the value object 3. use pointer instead of copy-by-value when passing to interval.Value 4. use insert interval since adding chunk could be out of order * fix tests compilation * fix tests compilation
82 lines
1.9 KiB
Go
82 lines
1.9 KiB
Go
package mount
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import (
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"github.com/hanwen/go-fuse/v2/fuse"
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"net/http"
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"syscall"
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"time"
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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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if wfs.IsOverQuota {
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return 0, fuse.Status(syscall.ENOSPC)
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}
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fh := wfs.GetHandle(FileHandleId(in.Fh))
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if fh == nil {
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return 0, fuse.ENOENT
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}
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fh.dirtyPages.writerPattern.MonitorWriteAt(int64(in.Offset), int(in.Size))
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tsNs := time.Now().UnixNano()
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fh.Lock()
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defer fh.Unlock()
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entry := fh.GetEntry()
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if entry == nil {
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return 0, fuse.OK
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}
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entry.Content = nil
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offset := int64(in.Offset)
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entry.Attributes.FileSize = uint64(max(offset+int64(len(data)), int64(entry.Attributes.FileSize)))
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// glog.V(4).Infof("%v write [%d,%d) %d", fh.f.fullpath(), req.Offset, req.Offset+int64(len(req.Data)), len(req.Data))
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fh.dirtyPages.AddPage(offset, data, fh.dirtyPages.writerPattern.IsSequentialMode(), tsNs)
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written = uint32(len(data))
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if offset == 0 {
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// detect mime type
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fh.contentType = http.DetectContentType(data)
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}
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fh.dirtyMetadata = true
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if IsDebugFileReadWrite {
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// print("+")
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fh.mirrorFile.WriteAt(data, offset)
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}
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return written, fuse.OK
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}
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