Files
s3/weed/mount/weedfs_file_write.go
zooqueen dd74d3e6d6 Replace AGPL MinIO fork with Apache-2.0 SeaweedFS fork; rebrand CLI weed->s3
hanzoai/s3 was an AGPL-3.0 MinIO fork whose network-copyleft blocks embedding
and reselling as a managed service. Replace it wholesale with a fork of
SeaweedFS (github.com/seaweedfs/seaweedfs, Apache-2.0, Go) which ships a
built-in S3 gateway + Filer.

- License: AGPL-3.0 -> Apache-2.0 (upstream LICENSE kept verbatim, incl.
  "Copyright 2025 Chris Lu"); NOTICE added crediting SeaweedFS. No AGPL/BUSL/
  SSPL/GPL or enterprise ("ee") files remain.
- Module: go.mod path set to github.com/hanzoai/s3 with a self-replace
  (replace github.com/seaweedfs/seaweedfs => ./) so the ~1800 internal Go files
  keep their upstream import paths with zero churn. Internal identifiers and
  import paths are intentionally NOT renamed.
- CLI rebrand: the binary is built as `s3` (was `weed`); root usage, per-command
  help/usage/flag strings, shell autocomplete program name, and the product name
  in CLI output now read "Hanzo S3" / `s3`. Users never see `weed`.
  (e.g. `s3 server`, `s3 filer`, `s3 master`, `s3 volume`, `s3 s3`, `s3 mount`.)
- Build: `make` (or `go build -o s3 ./weed`) builds the `s3` binary green;
  `cmd/weed-db` and `cmd/weed-sql` also build; `go vet ./weed/command/` clean.
- README/LLM.md rewritten for Hanzo S3; AGENTS.md/CLAUDE.md symlinks preserved.
- Dropped a 33MB prebuilt Mach-O `stress` binary upstream had committed; `.gitignore`
  updated to ignore the `s3` build output.
2026-06-18 23:41:25 -07:00

115 lines
3.2 KiB
Go

package mount
import (
"net/http"
"syscall"
"time"
"github.com/seaweedfs/go-fuse/v2/fuse"
"github.com/seaweedfs/seaweedfs/weed/glog"
"github.com/seaweedfs/seaweedfs/weed/util"
)
/**
* 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) {
// Check quota including uncommitted writes for real-time enforcement
if wfs.IsOverQuotaWithUncommitted() {
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()
fhActiveLock := fh.wfs.fhLockTable.AcquireLock("Write", fh.fh, util.ExclusiveLock)
defer fh.wfs.fhLockTable.ReleaseLock(fh.fh, fhActiveLock)
entry := fh.GetEntry()
if entry == nil {
return 0, fuse.OK
}
entry.Content = nil
offset := int64(in.Offset)
oldFileSize := int64(entry.Attributes.FileSize)
newFileSize := max(offset+int64(len(data)), oldFileSize)
entry.Attributes.FileSize = uint64(newFileSize)
// POSIX: writes update mtime and ctime. Stamp the entry now so the
// flush path persists the write time rather than overwriting any
// user-set mtime (e.g., utimes/touch -m -d) at flush time.
writeNow := time.Unix(0, tsNs)
entry.Attributes.Mtime = writeNow.Unix()
entry.Attributes.MtimeNs = int32(writeNow.Nanosecond())
entry.Attributes.Ctime = writeNow.Unix()
entry.Attributes.CtimeNs = int32(writeNow.Nanosecond())
// Track uncommitted bytes for real-time quota enforcement.
// Only count the new bytes being added beyond the current file size.
if newFileSize > oldFileSize {
wfs.AddUncommittedBytes(newFileSize - oldFileSize)
}
// glog.V(4).Infof("%v write [%d,%d) %d", fh.f.fullpath(), req.Offset, req.Offset+int64(len(req.Data)), len(req.Data))
if err := fh.dirtyPages.AddPage(offset, data, fh.dirtyPages.writerPattern.IsSequentialMode(), tsNs); err != nil {
glog.Errorf("AddPage error: %v", err)
return 0, fuse.EIO
}
written = uint32(len(data))
if offset == 0 {
// detect mime type
fh.contentType = http.DetectContentType(data)
}
fh.dirtyMetadata = true
// Invalidate the mtime cache so the next Open will not set FOPEN_KEEP_CACHE.
wfs.invalidateOpenMtimeCache(in.NodeId)
// POSIX: clear SUID/SGID bits on write by non-root users.
if in.Uid != 0 {
entry.Attributes.FileMode &^= 0o6000
}
if IsDebugFileReadWrite {
// print("+")
fh.mirrorFile.WriteAt(data, offset)
}
return written, fuse.OK
}