-
Notifications
You must be signed in to change notification settings - Fork 985
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
* Use librados to access Ceph * build juicefs with librados * add ceph as dep
- Loading branch information
Showing
4 changed files
with
196 additions
and
0 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,188 @@ | ||
| // +build ceph | ||
|
|
||
| /* | ||
| * JuiceFS, Copyright (C) 2020 Juicedata, Inc. | ||
| * | ||
| * This program is free software: you can use, redistribute, and/or modify | ||
| * it under the terms of the GNU Affero General Public License, version 3 | ||
| * or later ("AGPL"), as published by the Free Software Foundation. | ||
| * | ||
| * This program is distributed in the hope that it will be useful, but WITHOUT | ||
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| * FITNESS FOR A PARTICULAR PURPOSE. | ||
| * | ||
| * You should have received a copy of the GNU Affero General Public License | ||
| * along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
| */ | ||
|
|
||
| package object | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "fmt" | ||
| "io" | ||
| "net/url" | ||
| "reflect" | ||
| "sync" | ||
|
|
||
| "github.com/ceph/go-ceph/rados" | ||
| ) | ||
|
|
||
| type ceph struct { | ||
| name string | ||
| conn *rados.Conn | ||
| free chan *rados.IOContext | ||
| } | ||
|
|
||
| func (c *ceph) String() string { | ||
| return fmt.Sprintf("ceph://%s", c.name) | ||
| } | ||
|
|
||
| func (c *ceph) Create() error { | ||
| names, err := c.conn.ListPools() | ||
| if err != nil { | ||
| return err | ||
| } | ||
| for _, name := range names { | ||
| if name == c.name { | ||
| return nil | ||
| } | ||
| } | ||
| return c.conn.MakePool(c.name) | ||
| } | ||
|
|
||
| func (c *ceph) newContext() (*rados.IOContext, error) { | ||
| select { | ||
| case ctx := <-c.free: | ||
| return ctx, nil | ||
| default: | ||
| return c.conn.OpenIOContext(c.name) | ||
| } | ||
| } | ||
|
|
||
| func (c *ceph) release(ctx *rados.IOContext) { | ||
| select { | ||
| case c.free <- ctx: | ||
| default: | ||
| ctx.Destroy() | ||
| } | ||
| } | ||
|
|
||
| func (c *ceph) do(f func(ctx *rados.IOContext) error) (err error) { | ||
| ctx, err := c.newContext() | ||
| if err != nil { | ||
| return err | ||
| } | ||
| err = f(ctx) | ||
| if err != nil { | ||
| ctx.Destroy() | ||
| } else { | ||
| c.release(ctx) | ||
| } | ||
| return | ||
| } | ||
|
|
||
| type cephReader struct { | ||
| c *ceph | ||
| ctx *rados.IOContext | ||
| key string | ||
| off int64 | ||
| limit int64 | ||
| } | ||
|
|
||
| func (r *cephReader) Read(buf []byte) (n int, err error) { | ||
| if r.limit > 0 && int64(len(buf)) > r.limit { | ||
| buf = buf[:r.limit] | ||
| } | ||
| n, err = r.ctx.Read(r.key, buf, uint64(r.off)) | ||
| r.off += int64(n) | ||
| if r.limit > 0 { | ||
| r.limit -= int64(n) | ||
| } | ||
| if err == nil && n < len(buf) { | ||
| err = io.EOF | ||
| } | ||
| return | ||
| } | ||
|
|
||
| func (r *cephReader) Close() error { | ||
| if r.ctx != nil { | ||
| r.c.release(r.ctx) | ||
| r.ctx = nil | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| func (c *ceph) Get(key string, off, limit int64) (io.ReadCloser, error) { | ||
| ctx, err := c.newContext() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return &cephReader{c, ctx, key, off, limit}, nil | ||
| } | ||
|
|
||
| var cephPool = sync.Pool{ | ||
| New: func() interface{} { | ||
| return make([]byte, 1<<20) | ||
| }, | ||
| } | ||
|
|
||
| func (c *ceph) Put(key string, in io.Reader) error { | ||
| return c.do(func(ctx *rados.IOContext) error { | ||
| if b, ok := in.(*bytes.Reader); ok { | ||
| v := reflect.ValueOf(b) | ||
| data := v.Elem().Field(0).Bytes() | ||
| return ctx.WriteFull(key, data) | ||
| } | ||
| buf := cephPool.Get().([]byte) | ||
| defer cephPool.Put(buf) | ||
| var off uint64 | ||
| for { | ||
| n, err := in.Read(buf) | ||
| if n > 0 { | ||
| if err = ctx.Write(key, buf[:n], off); err != nil { | ||
| return err | ||
| } | ||
| off += uint64(n) | ||
| } else { | ||
| if err == io.EOF { | ||
| return nil | ||
| } | ||
| return err | ||
| } | ||
| } | ||
| }) | ||
| } | ||
|
|
||
| func (c *ceph) Delete(key string) error { | ||
| return c.do(func(ctx *rados.IOContext) error { | ||
| return ctx.Delete(key) | ||
| }) | ||
| } | ||
|
|
||
| func newCeph(endpoint, cluster, user string) (ObjectStorage, error) { | ||
| uri, err := url.ParseRequestURI(endpoint) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("Invalid endpoint %s: %s", endpoint, err) | ||
| } | ||
| name := uri.Host | ||
| conn, err := rados.NewConnWithClusterAndUser(cluster, user) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("Can't create connection to cluster %s for user %s: %s", cluster, user, err) | ||
| } | ||
| if err := conn.ReadDefaultConfigFile(); err != nil { | ||
| logger.Fatalf("Can't read default config file: %s", err) | ||
| } | ||
| if err := conn.Connect(); err != nil { | ||
| return nil, fmt.Errorf("Can't connect to cluster %s: %s", cluster, err) | ||
| } | ||
| return &ceph{ | ||
| name: name, | ||
| conn: conn, | ||
| free: make(chan *rados.IOContext, 50), | ||
| }, nil | ||
| } | ||
|
|
||
| func init() { | ||
| register("ceph", newCeph) | ||
| } |