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37#define DEBUG_SUBSYSTEM S_LMV
38#include <linux/slab.h>
39#include <linux/module.h>
40#include <linux/init.h>
41#include <linux/slab.h>
42#include <linux/pagemap.h>
43#include <asm/div64.h>
44#include <linux/seq_file.h>
45#include <linux/namei.h>
46#include <linux/lustre_intent.h>
47
48#include <obd_support.h>
49#include <lustre/lustre_idl.h>
50#include <lustre_lib.h>
51#include <lustre_net.h>
52#include <lustre_dlm.h>
53#include <obd_class.h>
54#include <lprocfs_status.h>
55#include "lmv_internal.h"
56
57static int lmv_intent_remote(struct obd_export *exp, void *lmm,
58 int lmmsize, struct lookup_intent *it,
59 const struct lu_fid *parent_fid, int flags,
60 struct ptlrpc_request **reqp,
61 ldlm_blocking_callback cb_blocking,
62 __u64 extra_lock_flags)
63{
64 struct obd_device *obd = exp->exp_obd;
65 struct lmv_obd *lmv = &obd->u.lmv;
66 struct ptlrpc_request *req = NULL;
67 struct lustre_handle plock;
68 struct md_op_data *op_data;
69 struct lmv_tgt_desc *tgt;
70 struct mdt_body *body;
71 int pmode;
72 int rc = 0;
73 ENTRY;
74
75 body = req_capsule_server_get(&(*reqp)->rq_pill, &RMF_MDT_BODY);
76 if (body == NULL)
77 RETURN(-EPROTO);
78
79 LASSERT((body->valid & OBD_MD_MDS));
80
81
82
83
84
85 if (it->it_op & IT_LOOKUP)
86 it->it_op = IT_GETATTR;
87
88
89
90
91 pmode = it->d.lustre.it_lock_mode;
92 if (pmode) {
93 plock.cookie = it->d.lustre.it_lock_handle;
94 it->d.lustre.it_lock_mode = 0;
95 it->d.lustre.it_data = NULL;
96 }
97
98 LASSERT(fid_is_sane(&body->fid1));
99
100 tgt = lmv_find_target(lmv, &body->fid1);
101 if (IS_ERR(tgt))
102 GOTO(out, rc = PTR_ERR(tgt));
103
104 OBD_ALLOC_PTR(op_data);
105 if (op_data == NULL)
106 GOTO(out, rc = -ENOMEM);
107
108 op_data->op_fid1 = body->fid1;
109
110 if (parent_fid != NULL) {
111
112
113
114 LASSERT(it->it_op & IT_OPEN);
115 op_data->op_fid2 = *parent_fid;
116
117
118 op_data->op_fid3 = body->fid1;
119 }
120
121 op_data->op_bias = MDS_CROSS_REF;
122 CDEBUG(D_INODE, "REMOTE_INTENT with fid="DFID" -> mds #%d\n",
123 PFID(&body->fid1), tgt->ltd_idx);
124
125 it->d.lustre.it_disposition &= ~DISP_ENQ_COMPLETE;
126 rc = md_intent_lock(tgt->ltd_exp, op_data, lmm, lmmsize, it,
127 flags, &req, cb_blocking, extra_lock_flags);
128 if (rc)
129 GOTO(out_free_op_data, rc);
130
131
132
133
134
135
136 if (it->d.lustre.it_lock_mode != 0) {
137 it->d.lustre.it_remote_lock_handle =
138 it->d.lustre.it_lock_handle;
139 it->d.lustre.it_remote_lock_mode = it->d.lustre.it_lock_mode;
140 }
141
142 it->d.lustre.it_lock_handle = plock.cookie;
143 it->d.lustre.it_lock_mode = pmode;
144
145 EXIT;
146out_free_op_data:
147 OBD_FREE_PTR(op_data);
148out:
149 if (rc && pmode)
150 ldlm_lock_decref(&plock, pmode);
151
152 ptlrpc_req_finished(*reqp);
153 *reqp = req;
154 return rc;
155}
156
157
158
159
160
161int lmv_intent_open(struct obd_export *exp, struct md_op_data *op_data,
162 void *lmm, int lmmsize, struct lookup_intent *it,
163 int flags, struct ptlrpc_request **reqp,
164 ldlm_blocking_callback cb_blocking,
165 __u64 extra_lock_flags)
166{
167 struct obd_device *obd = exp->exp_obd;
168 struct lmv_obd *lmv = &obd->u.lmv;
169 struct lmv_tgt_desc *tgt;
170 struct mdt_body *body;
171 int rc;
172 ENTRY;
173
174 tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
175 if (IS_ERR(tgt))
176 RETURN(PTR_ERR(tgt));
177
178
179
180 if ((it->it_op & IT_CREAT) &&
181 !(it->it_flags & MDS_OPEN_BY_FID)) {
182
183
184
185
186 op_data->op_fid3 = op_data->op_fid2;
187 rc = lmv_fid_alloc(exp, &op_data->op_fid2, op_data);
188 if (rc != 0)
189 RETURN(rc);
190 }
191
192 CDEBUG(D_INODE, "OPEN_INTENT with fid1="DFID", fid2="DFID","
193 " name='%s' -> mds #%d\n", PFID(&op_data->op_fid1),
194 PFID(&op_data->op_fid2), op_data->op_name, tgt->ltd_idx);
195
196 rc = md_intent_lock(tgt->ltd_exp, op_data, lmm, lmmsize, it, flags,
197 reqp, cb_blocking, extra_lock_flags);
198 if (rc != 0)
199 RETURN(rc);
200
201
202
203
204 if ((it->d.lustre.it_disposition & DISP_LOOKUP_NEG) &&
205 !(it->d.lustre.it_disposition & DISP_OPEN_CREATE) &&
206 !(it->d.lustre.it_disposition & DISP_OPEN_OPEN))
207 RETURN(rc);
208
209 body = req_capsule_server_get(&(*reqp)->rq_pill, &RMF_MDT_BODY);
210 if (body == NULL)
211 RETURN(-EPROTO);
212
213
214
215 if (likely(!(body->valid & OBD_MD_MDS)))
216 RETURN(0);
217
218
219
220
221
222 rc = lmv_intent_remote(exp, lmm, lmmsize, it, &op_data->op_fid1, flags,
223 reqp, cb_blocking, extra_lock_flags);
224 if (rc != 0) {
225 LASSERT(rc < 0);
226
227
228
229
230
231
232 CDEBUG(D_INODE, "Can't handle remote %s: dir "DFID"("DFID"):"
233 "%*s: %d\n", LL_IT2STR(it), PFID(&op_data->op_fid2),
234 PFID(&op_data->op_fid1), op_data->op_namelen,
235 op_data->op_name, rc);
236 RETURN(rc);
237 }
238
239 RETURN(rc);
240}
241
242
243
244
245int lmv_intent_lookup(struct obd_export *exp, struct md_op_data *op_data,
246 void *lmm, int lmmsize, struct lookup_intent *it,
247 int flags, struct ptlrpc_request **reqp,
248 ldlm_blocking_callback cb_blocking,
249 __u64 extra_lock_flags)
250{
251 struct obd_device *obd = exp->exp_obd;
252 struct lmv_obd *lmv = &obd->u.lmv;
253 struct lmv_tgt_desc *tgt = NULL;
254 struct mdt_body *body;
255 int rc = 0;
256 ENTRY;
257
258 tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
259 if (IS_ERR(tgt))
260 RETURN(PTR_ERR(tgt));
261
262 if (!fid_is_sane(&op_data->op_fid2))
263 fid_zero(&op_data->op_fid2);
264
265 CDEBUG(D_INODE, "LOOKUP_INTENT with fid1="DFID", fid2="DFID
266 ", name='%s' -> mds #%d\n", PFID(&op_data->op_fid1),
267 PFID(&op_data->op_fid2),
268 op_data->op_name ? op_data->op_name : "<NULL>",
269 tgt->ltd_idx);
270
271 op_data->op_bias &= ~MDS_CROSS_REF;
272
273 rc = md_intent_lock(tgt->ltd_exp, op_data, lmm, lmmsize, it,
274 flags, reqp, cb_blocking, extra_lock_flags);
275
276 if (rc < 0 || *reqp == NULL)
277 RETURN(rc);
278
279
280
281
282
283 body = req_capsule_server_get(&(*reqp)->rq_pill, &RMF_MDT_BODY);
284 if (body == NULL)
285 RETURN(-EPROTO);
286
287 if (likely(!(body->valid & OBD_MD_MDS)))
288 RETURN(0);
289
290 rc = lmv_intent_remote(exp, lmm, lmmsize, it, NULL, flags, reqp,
291 cb_blocking, extra_lock_flags);
292
293 RETURN(rc);
294}
295
296int lmv_intent_lock(struct obd_export *exp, struct md_op_data *op_data,
297 void *lmm, int lmmsize, struct lookup_intent *it,
298 int flags, struct ptlrpc_request **reqp,
299 ldlm_blocking_callback cb_blocking,
300 __u64 extra_lock_flags)
301{
302 struct obd_device *obd = exp->exp_obd;
303 int rc;
304 ENTRY;
305
306 LASSERT(it != NULL);
307 LASSERT(fid_is_sane(&op_data->op_fid1));
308
309 CDEBUG(D_INODE, "INTENT LOCK '%s' for '%*s' on "DFID"\n",
310 LL_IT2STR(it), op_data->op_namelen, op_data->op_name,
311 PFID(&op_data->op_fid1));
312
313 rc = lmv_check_connect(obd);
314 if (rc)
315 RETURN(rc);
316
317 if (it->it_op & (IT_LOOKUP | IT_GETATTR | IT_LAYOUT))
318 rc = lmv_intent_lookup(exp, op_data, lmm, lmmsize, it,
319 flags, reqp, cb_blocking,
320 extra_lock_flags);
321 else if (it->it_op & IT_OPEN)
322 rc = lmv_intent_open(exp, op_data, lmm, lmmsize, it,
323 flags, reqp, cb_blocking,
324 extra_lock_flags);
325 else
326 LBUG();
327 RETURN(rc);
328}
329