{"id":800,"date":"2017-11-28T08:21:04","date_gmt":"2017-11-28T08:21:04","guid":{"rendered":"http:\/\/www.selinuxplus.com\/?p=800"},"modified":"2017-11-28T08:32:43","modified_gmt":"2017-11-28T08:32:43","slug":"rgw-nfs-%e6%ba%90%e7%a0%81%e5%88%86%e6%9e%90","status":"publish","type":"post","link":"http:\/\/www.selinuxplus.com\/?p=800","title":{"rendered":"RGW NFS\/ganesha \u6e90\u7801\u5206\u6790"},"content":{"rendered":"

0x1 RGW NFS Open \u6d41\u7a0b<\/p>\n

 \u5ba2\u6237\u7aef:open->vfs_open->nfs_open() > nfs3_proc_open()    \r\n gansha server: \r\n     Dispatcher: decode xprt\r\n                nfs_rpc_get_funcdesc()->SVC_GETARGS(xprt)->reqdata -> nfs_rpc_enqueue_req()\r\n     Worker: dequeue xprt\r\n                 nfs_rpc_dequeue_req()-> req_data -> nfs_rpc_execute-> nfs_dupreq_start()> rbtree -> syc_sendreplay\r\n     fsal: rgw plugin\r\n                 fasl_open()-> rgw_fasl_open2()->rgw_open() \r\n  ceph: rgw server<\/pre>\n
0x 2 Ganesha \u6838\u5fc3\u6a21\u5757\uff1a
\n  – MemoryManager \u8d1f\u8d23Ganesha\u7684\u5185\u5b58\u7ba1\u7406
\n  – RPC SES_GSS  \u8d1f\u8d23\u4f7f\u7528RPCSEC_GSS\u7684\u6570\u636e\u4f20\u8f93\uff0c\u901a\u5e38\u4f7f\u7528krb5\uff0cSPKM3\u6216LIPKEY\u6765\u7ba1\u7406
\n  – NFS NFS\u534f\u8bae\uff0c\u4e3b\u8981\u662f\u6d88\u606f\u7ed3\u6784\u6a21\u5757
\n  – Metadata(Inode) Cache: \u5143\u6570\u636e\u7f13\u5b58
\n  – File Content Cache: \u8d1f\u8d23\u6570\u636e\u7f13\u5b58\uff0c\u4e3b\u8981\u662f\u5c0f\u6570\u636e\u3002
\n  – FSAL (File system Abstraction Layer, \u62bd\u8c61\u7684\u8bbf\u95ee\u5bf9\u8c61)
\n  – Hash Tables rbtree group\u3002<\/p>\n
  \u5185\u5b58\u7ba1\u7406\uff1a
\n   LibC malloc \/ free\u8c03\u7528\uff0c\u5185\u5b58\u662f\u91c7\u7528calloc\u5206\u914d\u7684\u3002<\/p>\n
 static inline void *\r\ngsh_calloc__(size_t n, size_t s,\r\n             const char *file, int line, const char *function)\r\n{\r\n        void *p = calloc(n, s);\r\n\r\n        if (p == NULL) {\r\n                LogMallocFailure(file, line, function, \"gsh_calloc\");\r\n                abort();\r\n        }\r\n\r\n        return p;\r\n}\r\n\r\n#define gsh_calloc(n, s) gsh_calloc__(n, s, __FILE__, __LINE__, __func__<\/pre>\n
   \u54c8\u5e0c\u8868\uff1a
\n     redblack tree
\n   \u4e3b\u8981\u5b88\u62a4\u8fdb\u7a0b
\n    \u2013 dispatcher thread: \u7528\u4e8e\u76d1\u542c\u548c\u5206\u53d1\u4f20\u5165\u7684NFS\u3001MOUNT\u8bf7\u6c42\u3002\u5b83\u4f1a\u9009\u62e9\u5904\u4e8e\u6700\u7a7a\u95f2\u7684worker\u7ebf\u7a0b\u7136\u540e\u5c06\u8bf7\u6c42\u6dfb\u52a0\u5230\u8fd9\u4e2aworker\u7ebf\u7a0b\u7684\u5f85\u5904\u7406\u5217\u8868\u4e2d\u3002\u8fd9\u4e2a\u7ebf\u7a0b\u4f1a\u4fdd\u7559\u6700\u8fd110\u5206\u949f\u5185\u7684\u8bf7\u6c42\u7b54\u590d\uff0c\u5982\u679c\u572810\u5206\u949f\u5185\u6536\u5230\u76f8\u540c\u6307\u4ee4\uff08\u5b58\u5728\u54c8\u5e0c\u8868\u5e76\u7528RPC Xid4\u503c\u5bfb\u5740\uff09\uff0c\u5219\u4f1a\u8fd4\u56de\u4ee5\u524d\u7684\u8bf7\u6c42\u56de\u590d\u3002
\n\t  \u2013 worker thread: Ganesha\u4e2d\u7684\u6838\u5fc3\u7ebf\u7a0b\uff0c\u4e5f\u662f\u4f7f\u7528\u6700\u591a\u7684\u7ebf\u7a0b\u3002worker\u7ebf\u7a0b\u7b49\u5f85dispatcher\u7684\u8c03\u5ea6\uff0c\u6536\u5230\u8bf7\u6c42\u540e\u5148\u5bf9\u5176\u8fdb\u884c\u89e3\u7801\uff0c\u7136\u540e\u901a\u8fc7\u8c03\u7528inode cache API\u548cfile content API\u6765\u5b8c\u6210\u8bf7\u6c42\u64cd\u4f5c\u3002
\n\t \u7f13\u5b58\uff1a
\n\t  Cache Inode Layer\u5c06\u5143\u6570\u636e\u4e0e\u5bf9\u5e94FSAL\u5bf9\u8c61handle\u653e\u5165\u54c8\u5e0c\u8868\u4e2d\uff0c\u7528\u6765\u5173\u8054\u6761\u76ee\u3002\u521d\u7248\u7684Ganesha\u91c7\u7528\u2019write through\u2019\u7f13\u5b58\u7b56\u7565\u6765\u505a\u5143\u6570\u636e\u7f13\u5b58\u3002\u5b9e\u4f8b\u7684\u5c5e\u6027\u4f1a\u5728\u4e00\u5b9a\u7684\u65f6\u95f4\uff08\u53ef\u5b9a\u4e49\uff09\u540e\u8fc7\u671f\uff0c\u8fc7\u671f\u540e\u8be5\u5b9e\u4f8b\u5c06\u4f1a\u5728\u5185\u5b58\u4e2d\u5220\u9664\u3002\u6bcf\u4e2a\u7ebf\u7a0b\u6709\u4e00\u4e2aLRU(Least Recently Used) \u5217\u8868\uff0c\u6bcf\u4e2a\u7f13\u5b58\u5b9e\u4f8b\u53ea\u80fd\u5b58\u5728\u4e8e1\u4e2a\u7ebf\u7a0b\u7684LRU\u4e2d\uff0c\u5982\u679c\u67d0\u4e2a\u7ebf\u7a0b\u83b7\u5f97\u4e86\u67d0\u4e2a\u5b9e\u4f8b\uff0c\u5c06\u4f1a\u8981\u6c42\u539f\u7ebf\u7a0b\u5728LRU\u5217\u8868\u4e2d\u91ca\u653e\u5bf9\u5e94\u6761\u76ee\u3002<\/p>\n
          \u6bcf\u4e2a\u7ebf\u7a0b\u9700\u8981\u81ea\u5df1\u8d1f\u8d23\u5783\u573e\u56de\u6536\uff0c\u5f53\u5783\u573e\u56de\u6536\u5f00\u59cb\u65f6\uff0c\u7ebf\u7a0b\u5c06\u4eceLRU\u5217\u8868\u4e0a\u6700\u65e7\u7684\u6761\u76ee\u5f00\u59cb\u6267\u884c\u3002 \u7136\u540e\u4f7f\u7528\u7279\u5b9a\u7684\u5783\u573e\u7b56\u7565\u6765\u51b3\u5b9a\u662f\u5426\u4fdd\u5b58\u6216\u6e05\u9664\u6761\u76ee\u3002\u7531\u4e8e\u5143\u6570\u636e\u7f13\u5b58\u5e94\u8be5\u975e\u5e38\u5927\uff08\u9ad8\u8fbe\u6570\u767e\u4e07\u6761\u76ee\uff09\uff0c\u56e0\u6b64\u5360\u6ee1\u5206\u914d\u5185\u5b58\u768490\uff05\uff08\u9ad8\u4f4d\uff09\u4e4b\u524d\u4e0d\u4f1a\u53d1\u751f\u5783\u573e\u56de\u6536\u3002Ganesha\u5c3d\u53ef\u80fd\u591a\u5f97\u5c06FSAL\u5bf9\u8c61\u653e\u5165\u7f13\u5b58\u7684\u2018\u6811\u578b\u62d3\u6251\u2019\u4e2d\uff0c\u5176\u4e2d\u8282\u70b9\u4ee3\u8868\u76ee\u5f55\uff0c\u53f6\u5b50\u53ef\u4ee3\u8868\u6587\u4ef6\u548c\u7b26\u53f7\u94fe\u63a5\uff1b\u53f6\u5b50\u7684\u5783\u573e\u56de\u6536\u8981\u65e9\u4e8e\u8282\u70b9\uff0c\u5f53\u8282\u70b9\u4e2d\u6ca1\u6709\u53f6\u5b50\u65f6\u624d\u4f1a\u505a\u5783\u573e\u56de\u6536\u3002<\/p>\n
\t   File Content Cache\u6570\u636e\u7f13\u5b58\u5e76\u4e0d\u662f\u72ec\u7acb\u4e8e\u4e0eInode Cache\uff0c\u4e00\u4e2a\u5bf9\u8c61\u7684\u5143\u6570\u636e\u7f13\u5b58\u548c\u6570\u636e\u7f13\u5b58\u4f1a\u4e00\u4e00\u5bf9\u5e94(\u6570\u636e\u7f13\u5b58\u662f\u5143\u6570\u636e\u7f13\u5b58\u7684\u2018\u5b50\u7f13\u5b58\u2019)\uff0c\u4ece\u800c\u907f\u514d\u4e86\u7f13\u5b58\u4e0d\u7edf\u4e00\u7684\u60c5\u51b5\u3002\u6587\u4ef6\u5185\u5bb9\u4f1a\u88ab\u7f13\u5b58\u81f3\u672c\u5730\u6587\u4ef6\u7cfb\u7edf\u7684\u4e13\u7528\u76ee\u5f55\u4e2d\uff0c\u4e00\u4e2a\u6570\u636e\u7f13\u5b58\u5b9e\u4f8b\u4f1a\u5bf9\u5e942\u4e2a\u6587\u4ef6\uff1a\u7d22\u5f15\u6587\u4ef6\u548c\u6570\u636e\u6587\u4ef6\u3002\u6570\u636e\u6587\u4ef6\u7b49\u540c\u4e8e\u88ab\u7f13\u5b58\u7684\u6587\u4ef6\u3002\u7d22\u5f15\u6587\u4ef6\u4e2d\u5305\u542b\u4e86\u5143\u6570\u636e\u4fe1\u606f\uff0c\u5176\u4e2d\u5305\u542b\u4e86\u5bf9\u91cd\u8981\u7684FSAL handle\u3002\u7d22\u5f15\u6587\u4ef6\u4e3b\u8981\u7528\u4e8e\u91cd\u5efa\u6570\u636e\u7f13\u5b58\uff0c\u5f53\u670d\u52a1\u5668\u7aef\u5d29\u6e83\u540e\u6ca1\u6709\u5e72\u51c0\u5730\u6e05\u6389\u7f13\u5b58\u65f6\uff0cFSAL handle\u4f1a\u8bfb\u53d6\u7d22\u5f15\u6587\u4ef6\u4e2d\u7684\u4fe1\u606f\u6765\u91cd\u5efa\u5143\u6570\u636e\u7f13\u5b58\uff0c\u5e76\u5c06\u5176\u6307\u5411\u6570\u636e\u6587\u4ef6\uff0c\u7528\u4ee5\u91cd\u5efa\u6570\u636e\u7f13\u5b58\u5b9e\u4f8b\u3002<\/p>\n
\t  \u5f53\u7f13\u5b58\u4e0d\u8db3\u65f6\uff0cworker thread\u4f1a\u67e5\u770bLRU\u5217\u8868\u4e2d\u5f88\u4e45\u672a\u88ab\u6253\u5f00\u7684\u5b9e\u4f8b\uff0c\u7136\u540e\u5f00\u59cb\u505a\u5143\u6570\u636e\u7f13\u5b58\u56de\u6536\u3002\u5f53\u5143\u6570\u636e\u7f13\u5b58\u56de\u6536\u5f00\u59cb\u65f6\uff0c\u6570\u636e\u7f13\u5b58\u7684\u5783\u573e\u56de\u6536\u4e5f\u4f1a\u540c\u65f6\u8fdb\u884c\uff1a\u5728\u56de\u6536\u6587\u4ef6\u7f13\u5b58\u5b9e\u4f8b\u65f6\uff0c\u5143\u6570\u636e\u7f13\u5b58\u4f1a\u95ee\u8be2\u6570\u636e\u7f13\u5b58\u662f\u5426\u8ba4\u8bc6\u8be5\u6587\u4ef6\u5b9e\u4f8b\uff0c\u5982\u679c\u4e0d\u8ba4\u8bc6\u5219\u4ee3\u8868\u8be5\u6570\u636e\u7f13\u5b58\u5df2\u7ecf\u65e0\u6548\uff0c\u5219\u5143\u6570\u636e\u56de\u6536\u6b63\u5e38\u8fdb\u884c\uff0c\u5e76\u5b8c\u6210\u5b9e\u4f8b\u7f13\u5b58\u56de\u6536\uff1b\u5982\u679c\u8ba4\u8bc6\uff0c\u5bf9\u5e94\u7684\u6587\u4ef6\u7f13\u5b58\u4ee5\u53ca\u6570\u636e\u7f13\u5b58\u5747\u4f1a\u88ab\u56de\u6536\uff0c\u968f\u540e\u5bf9\u5e94\u7684\u5143\u6570\u636e\u7f13\u5b58\u4e5f\u4f1a\u88ab\u56de\u6536\u3002\u8fd9\u6837\u4fdd\u8bc1\u4e86\u4e00\u4e2a\u6570\u636e\u7f13\u5b58\u6709\u6548\u7684\u5b9e\u4f8b\u4e0d\u4f1a\u88ab\u56de\u6536\u3002<\/p>\n
\t  \u8fd9\u79cd\u65b9\u5f0f\u5f88\u7b26\u5408Ganesha\u7684\u67b6\u6784\u8bbe\u8ba1\uff1aworker\u7ebf\u7a0b\u53ef\u4ee5\u540c\u65f6\u7ba1\u7406\u5143\u6570\u636e\u7f13\u5b58\u548c\u6570\u636e\u7f13\u5b58\uff0c\u4e24\u8005\u4e00\u76f4\u4fdd\u6301\u4e00\u81f4<\/p>\n
0x3 RGW-NFS release notes\uff1a
\nNew NFS-Ganesha FSALexporting RGW Namespace. Runs a full
\nCeph RGW under an NFS-Ganesha process. Cache coherent peer
\nof all gateways in the cluster.
\nGoals:
\n\t Add RGW\/S3 as an adjunct namespace on existing POSIX
\nclients
\n\tSupport S3 Legacy \u201cPrefix and Delimiter\u201d Namespace
\nConvention
\n\tOnly supports \u2018\/\u2019 delimiter currently
\n\tBuild foundation for more interesting workflows, e.g.
\n\tpNFS direct placement of sharded objects (future)
\n\tconsistent caching (future)
\n0x4 \u53c2\u7167\uff1a
\n   http:\/\/blog.umcloud.com\/nfs-ganesha\/<\/p>\n","protected":false},"excerpt":{"rendered":"
0x1 RGW NFS Open \u6d41\u7a0b \u5ba2\u6237\u7aef:o…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[84],"tags":[180,172,171,170],"_links":{"self":[{"href":"http:\/\/www.selinuxplus.com\/index.php?rest_route=\/wp\/v2\/posts\/800"}],"collection":[{"href":"http:\/\/www.selinuxplus.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.selinuxplus.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.selinuxplus.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.selinuxplus.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=800"}],"version-history":[{"count":5,"href":"http:\/\/www.selinuxplus.com\/index.php?rest_route=\/wp\/v2\/posts\/800\/revisions"}],"predecessor-version":[{"id":806,"href":"http:\/\/www.selinuxplus.com\/index.php?rest_route=\/wp\/v2\/posts\/800\/revisions\/806"}],"wp:attachment":[{"href":"http:\/\/www.selinuxplus.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=800"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.selinuxplus.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=800"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.selinuxplus.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=800"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}