1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Lustre filesystem abstraction routines
6 * Copyright (C) 2004 Cluster File Systems, Inc.
8 * This file is part of Lustre, http://www.lustre.org.
10 * Lustre is free software; you can redistribute it and/or
11 * modify it under the terms of version 2 of the GNU General Public
12 * License as published by the Free Software Foundation.
14 * Lustre is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with Lustre; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 #define DEBUG_SUBSYSTEM S_SM
26 #include <linux/kmod.h>
27 #include <linux/init.h>
29 #include <linux/slab.h>
30 #include <linux/obd_class.h>
31 #include <linux/obd_support.h>
32 #include <linux/lustre_lib.h>
33 #include <linux/lustre_idl.h>
34 #include <linux/lustre_fsfilt.h>
35 #include <linux/lustre_lite.h>
36 #include <linux/lustre_mds.h>
37 #include <linux/lustre_smfs.h>
38 #include "smfs_internal.h"
40 static int mds_rec_link_pack(char *buffer, struct dentry *dentry,
41 struct inode *dir, void *data1, void *data2)
43 struct dentry *src = (struct dentry *)data1;
44 struct dentry *tgt = (struct dentry *)data2;
45 struct mds_kml_pack_info *mkpi;
46 struct lustre_msg *msg = NULL;
47 struct mdc_op_data *op_data;
51 OBD_ALLOC(op_data, sizeof(*op_data));
55 mdc_prepare_mdc_data(op_data, src->d_inode, dir,
56 (char *)tgt->d_name.name,
59 PACK_KML_REC_INIT(buffer, MDS_REINT);
60 mkpi = (struct mds_kml_pack_info *)buffer;
62 mkpi->mpi_bufcount = 2;
63 mkpi->mpi_size[0] = sizeof(struct mds_rec_link);
64 mkpi->mpi_size[1] = op_data->namelen + 1;
66 /* the mds reint log format is: opcode + mkpi + request */
67 msg = (struct lustre_msg *)(buffer + sizeof(*mkpi));
68 lustre_init_msg(msg, mkpi->mpi_bufcount, mkpi->mpi_size, NULL);
70 tmp = mdc_link_pack(msg, 0, op_data);
71 OBD_FREE(op_data, sizeof(*op_data));
72 mkpi->mpi_total_size = tmp - (void *)msg;
73 rc = mkpi->mpi_total_size + sizeof(*mkpi) + sizeof(int);
77 /* FIXME-WANGDI: did not think about EA situation. */
78 static int mds_rec_setattr_pack(char *buffer, struct dentry *dentry,
79 struct inode *dir, void *data1, void *data2)
81 struct iattr *iattr = (struct iattr *)data1;
82 struct mds_rec_setattr *rec = NULL;
83 struct mds_kml_pack_info *mkpi;
84 struct lustre_msg *msg = NULL;
85 struct mdc_op_data *op_data;
86 int rc = 0, ealen = 0;
90 OBD_ALLOC(op_data, sizeof(*op_data));
93 mdc_prepare_mdc_data(op_data, dir, NULL, NULL, 0, 0);
95 PACK_KML_REC_INIT(buffer, MDS_REINT);
96 mkpi = (struct mds_kml_pack_info*)buffer;
98 mkpi->mpi_bufcount = 1;
99 mkpi->mpi_size[0] = sizeof(struct mds_rec_setattr);
101 mkpi->mpi_bufcount++;
102 mkpi->mpi_size[1] = *(int *)data2;
103 ealen = *(int *)data2;
104 ea = data2 + sizeof(ealen);
107 msg = (struct lustre_msg *)(buffer + sizeof(*mkpi));
108 lustre_init_msg(msg, mkpi->mpi_bufcount, mkpi->mpi_size, NULL);
110 tmp = mdc_setattr_pack(msg, 0, op_data, iattr, ea, ealen, NULL, 0);
111 OBD_FREE(op_data, sizeof(*op_data));
113 /* FIXME-WANGDI: there are maybe some better ways to set the time
115 rec = (struct mds_rec_setattr *)lustre_msg_buf(msg, 0, 0);
116 if (rec->sa_valid & ATTR_CTIME)
117 rec->sa_valid |= ATTR_CTIME_SET;
118 if (rec->sa_valid & ATTR_MTIME)
119 rec->sa_valid |= ATTR_MTIME_SET;
120 if (rec->sa_valid & ATTR_ATIME)
121 rec->sa_valid |= ATTR_ATIME_SET;
123 mkpi->mpi_total_size = tmp - (void *)msg;
124 rc = mkpi->mpi_total_size + sizeof(*mkpi) + sizeof(int);
129 static int mds_rec_create_pack(char *buffer, struct dentry *dentry,
130 struct inode *dir, void *data1,
133 struct mds_kml_pack_info *mkpi;
134 struct lustre_msg *msg = NULL;
135 struct mdc_op_data *op_data;
136 struct mds_rec_create *rec;
137 int rc = 0, tgt_len = 0;
142 OBD_ALLOC(op_data, sizeof(*op_data));
146 mdc_prepare_mdc_data(op_data, dir, dentry->d_inode,
147 (char *)dentry->d_name.name,
148 dentry->d_name.len, 0);
150 PACK_KML_REC_INIT(buffer, MDS_REINT);
151 mkpi = (struct mds_kml_pack_info *)buffer;
153 mkpi->mpi_bufcount = 2;
154 mkpi->mpi_size[0] = sizeof(struct mds_rec_create);
155 mkpi->mpi_size[1] = op_data->namelen + 1;
157 if (data1 && data2) {
158 mkpi->mpi_size[2] = *(int *)data2;
159 mkpi->mpi_bufcount++;
163 /* for symlink, data1 will be the tgt name. */
164 tgt_len = *(int *)data2;
166 msg = (struct lustre_msg *)(buffer + sizeof(*mkpi));
167 lustre_init_msg(msg, mkpi->mpi_bufcount, mkpi->mpi_size, NULL);
169 tmp = mdc_create_pack(msg, 0, op_data, dentry->d_inode->i_mode,
170 dentry->d_inode->i_mode, data1, tgt_len);
172 rec = (struct mds_rec_create *)lustre_msg_buf(msg, 0, 0);
173 rec->cr_replayid = op_data->id2;
174 rec->cr_flags |= REC_REINT_CREATE;
175 mkpi->mpi_total_size = tmp - (void *)msg;
176 rc = mkpi->mpi_total_size + sizeof(*mkpi) + sizeof(int);
177 OBD_FREE(op_data, sizeof(*op_data));
182 static int mds_rec_unlink_pack(char *buffer, struct dentry *dentry,
183 struct inode *dir, void *data1,
186 struct lustre_msg *msg = NULL;
187 struct mds_kml_pack_info *mkpi;
188 struct mdc_op_data *op_data;
189 int mode = *(int*)data1;
193 OBD_ALLOC(op_data, sizeof(*op_data));
197 mdc_prepare_mdc_data(op_data, dir, NULL,
198 (char *)dentry->d_name.name,
199 dentry->d_name.len, mode);
201 PACK_KML_REC_INIT(buffer, MDS_REINT);
202 mkpi = (struct mds_kml_pack_info*)buffer;
204 mkpi->mpi_bufcount = 2;
205 mkpi->mpi_size[0] = sizeof(struct mds_rec_unlink);
206 mkpi->mpi_size[1] = op_data->namelen + 1;
208 msg = (struct lustre_msg *)(buffer + sizeof(*mkpi));
209 lustre_init_msg(msg, mkpi->mpi_bufcount, mkpi->mpi_size, NULL);
211 tmp = mdc_unlink_pack(msg, 0, op_data);
213 mkpi->mpi_total_size = tmp - (void*)msg;
214 rc = mkpi->mpi_total_size + sizeof(*mkpi) + sizeof(int);
215 OBD_FREE(op_data, sizeof(*op_data));
220 static int mds_rec_rename_pack(char *buffer, struct dentry *dentry,
221 struct inode *dir, void *data1, void *data2)
223 struct dentry *new_dentry = (struct dentry *)data2;
224 struct inode *new_dir = (struct inode *)data1;
225 struct mds_kml_pack_info *mkpi;
226 struct lustre_msg *msg = NULL;
227 struct mdc_op_data *op_data;
228 struct mds_rec_rename *rec;
232 OBD_ALLOC(op_data, sizeof(*op_data));
235 mdc_prepare_mdc_data(op_data, dir, new_dir, NULL, 0, 0);
237 PACK_KML_REC_INIT(buffer, MDS_REINT);
238 mkpi = (struct mds_kml_pack_info*)buffer;
240 mkpi->mpi_bufcount = 3;
241 mkpi->mpi_size[0] = sizeof(struct mds_rec_rename);
242 mkpi->mpi_size[1] = dentry->d_name.len + 1;
243 mkpi->mpi_size[2] = new_dentry->d_name.len + 1;
245 rec = (struct mds_rec_rename *)(buffer + sizeof(*mkpi));
248 msg = (struct lustre_msg *)(buffer + sizeof(*mkpi));
249 lustre_init_msg(msg, mkpi->mpi_bufcount, mkpi->mpi_size, NULL);
251 tmp = mdc_rename_pack(msg, 0, op_data, (char *)dentry->d_name.name,
252 dentry->d_name.len, (char *)new_dentry->d_name.name,
253 new_dentry->d_name.len);
255 mkpi->mpi_total_size = tmp - (void*)msg;
256 rc = mkpi->mpi_total_size + sizeof(*mkpi) + sizeof(int);
257 OBD_FREE(op_data, sizeof(*op_data));
261 typedef int (*mds_pack_rec_func)(char *, struct dentry*, struct inode *, void *, void*);
263 static mds_pack_rec_func mds_kml_pack[REINT_MAX + 1] = {
264 [REINT_LINK] mds_rec_link_pack,
265 [REINT_SETATTR] mds_rec_setattr_pack,
266 [REINT_CREATE] mds_rec_create_pack,
267 [REINT_UNLINK] mds_rec_unlink_pack,
268 [REINT_RENAME] mds_rec_rename_pack,
271 int mds_rec_pack(int op, char *buffer, struct dentry *dentry,
272 struct inode *dir, void * arg, void * arg2)
274 return mds_kml_pack[op](buffer, dentry, dir, arg, arg2);