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mirror of https://github.com/seaweedfs/seaweedfs.git synced 2024-12-24 09:27:54 +08:00
seaweedfs/weed/mount/weedfs_file_write.go
Chris Lu d4566d4aaa
more solid weed mount ()
* 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 985137ec47.

* 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
2023-01-02 23:20:45 -08:00

82 lines
1.9 KiB
Go

package mount
import (
"github.com/hanwen/go-fuse/v2/fuse"
"net/http"
"syscall"
"time"
)
/**
* Write data
*
* Write should return exactly the number of bytes requested
* except on error. An exception to this is when the file has
* been opened in 'direct_io' mode, in which case the return value
* of the write system call will reflect the return value of this
* operation.
*
* Unless FUSE_CAP_HANDLE_KILLPRIV is disabled, this method is
* expected to reset the setuid and setgid bits.
*
* fi->fh will contain the value set by the open method, or will
* be undefined if the open method didn't set any value.
*
* Valid replies:
* fuse_reply_write
* fuse_reply_err
*
* @param req request handle
* @param ino the inode number
* @param buf data to write
* @param size number of bytes to write
* @param off offset to write to
* @param fi file information
*/
func (wfs *WFS) Write(cancel <-chan struct{}, in *fuse.WriteIn, data []byte) (written uint32, code fuse.Status) {
if wfs.IsOverQuota {
return 0, fuse.Status(syscall.ENOSPC)
}
fh := wfs.GetHandle(FileHandleId(in.Fh))
if fh == nil {
return 0, fuse.ENOENT
}
fh.dirtyPages.writerPattern.MonitorWriteAt(int64(in.Offset), int(in.Size))
tsNs := time.Now().UnixNano()
fh.Lock()
defer fh.Unlock()
entry := fh.GetEntry()
if entry == nil {
return 0, fuse.OK
}
entry.Content = nil
offset := int64(in.Offset)
entry.Attributes.FileSize = uint64(max(offset+int64(len(data)), int64(entry.Attributes.FileSize)))
// glog.V(4).Infof("%v write [%d,%d) %d", fh.f.fullpath(), req.Offset, req.Offset+int64(len(req.Data)), len(req.Data))
fh.dirtyPages.AddPage(offset, data, fh.dirtyPages.writerPattern.IsSequentialMode(), tsNs)
written = uint32(len(data))
if offset == 0 {
// detect mime type
fh.contentType = http.DetectContentType(data)
}
fh.dirtyMetadata = true
if IsDebugFileReadWrite {
// print("+")
fh.mirrorFile.WriteAt(data, offset)
}
return written, fuse.OK
}