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 mdc_prepare_mdc_data(&op_data, src->d_inode, dir,
52 tgt->d_name.name, tgt->d_name.len, 0);
54 PACK_KML_REC_INIT(buffer, MDS_REINT);
55 mkpi = (struct mds_kml_pack_info *)buffer;
57 mkpi->mpi_bufcount = 2;
58 mkpi->mpi_size[0] = sizeof(struct mds_rec_link);
59 mkpi->mpi_size[1] = op_data.namelen + 1;
61 /* the mds reint log format is: opcode + mkpi + request */
62 msg = (struct lustre_msg *)(buffer + sizeof(*mkpi));
63 lustre_init_msg(msg, mkpi->mpi_bufcount, mkpi->mpi_size, NULL);
65 tmp = mdc_link_pack(msg, 0, &op_data);
66 mkpi->mpi_total_size = tmp - (void *)msg;
67 rc = mkpi->mpi_total_size + sizeof(*mkpi) + sizeof(int);
71 /* FIXME-WANGDI: did not think about EA situation. */
72 static int mds_rec_setattr_pack(char *buffer, struct dentry *dentry,
73 struct inode *dir, void *data1, void *data2)
75 struct iattr *iattr = (struct iattr *)data1;
76 struct mds_rec_setattr *rec = NULL;
77 struct mds_kml_pack_info *mkpi;
78 struct lustre_msg *msg = NULL;
79 struct mdc_op_data op_data;
80 int rc = 0, ealen = 0;
84 mdc_prepare_mdc_data(&op_data, dir, NULL, NULL, 0, 0);
86 PACK_KML_REC_INIT(buffer, MDS_REINT);
87 mkpi = (struct mds_kml_pack_info*)buffer;
89 mkpi->mpi_bufcount = 1;
90 mkpi->mpi_size[0] = sizeof(struct mds_rec_setattr);
93 mkpi->mpi_size[1] = *(int *)data2;
94 ealen = *(int *)data2;
95 ea = data2 + sizeof(ealen);
98 msg = (struct lustre_msg *)(buffer + sizeof(*mkpi));
99 lustre_init_msg(msg, mkpi->mpi_bufcount, mkpi->mpi_size, NULL);
101 tmp = mdc_setattr_pack(msg, 0, &op_data, iattr, ea, ealen, NULL, 0);
103 /* FIXME-WANGDI: there are maybe some better ways to set the time
105 rec = (struct mds_rec_setattr *)lustre_msg_buf(msg, 0, 0);
106 if (rec->sa_valid & ATTR_CTIME)
107 rec->sa_valid |= ATTR_CTIME_SET;
108 if (rec->sa_valid & ATTR_MTIME)
109 rec->sa_valid |= ATTR_MTIME_SET;
110 if (rec->sa_valid & ATTR_ATIME)
111 rec->sa_valid |= ATTR_ATIME_SET;
113 mkpi->mpi_total_size = tmp - (void *)msg;
114 rc = mkpi->mpi_total_size + sizeof(*mkpi) + sizeof(int);
119 static int mds_rec_create_pack(char *buffer, struct dentry *dentry,
120 struct inode *dir, void *data1,
123 struct mds_kml_pack_info *mkpi;
124 struct lustre_msg *msg = NULL;
125 struct mdc_op_data op_data;
126 struct mds_rec_create *rec;
127 int rc = 0, tgt_len = 0;
130 mdc_prepare_mdc_data(&op_data, dir, dentry->d_inode,
131 dentry->d_name.name, dentry->d_name.len, 0);
133 PACK_KML_REC_INIT(buffer, MDS_REINT);
134 mkpi = (struct mds_kml_pack_info *)buffer;
136 mkpi->mpi_bufcount = 2;
137 mkpi->mpi_size[0] = sizeof(struct mds_rec_create);
138 mkpi->mpi_size[1] = op_data.namelen + 1;
140 if (data1 && data2) {
141 mkpi->mpi_size[2] = *(int *)data2;
142 mkpi->mpi_bufcount++;
146 /* for symlink, data1 will be the tgt name. */
147 tgt_len = *(int *)data2;
149 msg = (struct lustre_msg *)(buffer + sizeof(*mkpi));
150 lustre_init_msg(msg, mkpi->mpi_bufcount, mkpi->mpi_size, NULL);
152 tmp = mdc_create_pack(msg, 0, &op_data, dentry->d_inode->i_mode,
153 dentry->d_inode->i_mode, data1, tgt_len);
155 rec = (struct mds_rec_create *)lustre_msg_buf(msg, 0, 0);
156 rec->cr_replayid = op_data.id2;
157 rec->cr_flags |= REC_REINT_CREATE;
158 mkpi->mpi_total_size = tmp - (void *)msg;
159 rc = mkpi->mpi_total_size + sizeof(*mkpi) + sizeof(int);
164 static int mds_rec_unlink_pack(char *buffer, struct dentry *dentry,
165 struct inode *dir, void *data1,
168 struct lustre_msg *msg = NULL;
169 struct mds_kml_pack_info *mkpi;
170 struct mdc_op_data op_data;
171 int mode = *(int*)data1;
175 mdc_prepare_mdc_data(&op_data, dir, NULL,
177 dentry->d_name.len, mode);
179 PACK_KML_REC_INIT(buffer, MDS_REINT);
180 mkpi = (struct mds_kml_pack_info*)buffer;
182 mkpi->mpi_bufcount = 2;
183 mkpi->mpi_size[0] = sizeof(struct mds_rec_unlink);
184 mkpi->mpi_size[1] = op_data.namelen + 1;
186 msg = (struct lustre_msg *)(buffer + sizeof(*mkpi));
187 lustre_init_msg(msg, mkpi->mpi_bufcount, mkpi->mpi_size, NULL);
189 tmp = mdc_unlink_pack(msg, 0, &op_data);
191 mkpi->mpi_total_size = tmp - (void*)msg;
192 rc = mkpi->mpi_total_size + sizeof(*mkpi) + sizeof(int);
197 static int mds_rec_rename_pack(char *buffer, struct dentry *dentry,
198 struct inode *dir, void *data1, void *data2)
200 struct dentry *new_dentry = (struct dentry *)data2;
201 struct inode *new_dir = (struct inode *)data1;
202 struct mds_kml_pack_info *mkpi;
203 struct lustre_msg *msg = NULL;
204 struct mdc_op_data op_data;
205 struct mds_rec_rename *rec;
209 mdc_prepare_mdc_data(&op_data, dir, new_dir, NULL, 0, 0);
211 PACK_KML_REC_INIT(buffer, MDS_REINT);
212 mkpi = (struct mds_kml_pack_info*)buffer;
214 mkpi->mpi_bufcount = 3;
215 mkpi->mpi_size[0] = sizeof(struct mds_rec_rename);
216 mkpi->mpi_size[1] = dentry->d_name.len + 1;
217 mkpi->mpi_size[2] = new_dentry->d_name.len + 1;
219 rec = (struct mds_rec_rename *)(buffer + sizeof(*mkpi));
222 msg = (struct lustre_msg *)(buffer + sizeof(*mkpi));
223 lustre_init_msg(msg, mkpi->mpi_bufcount, mkpi->mpi_size, NULL);
225 tmp = mdc_rename_pack(msg, 0, &op_data, dentry->d_name.name,
226 dentry->d_name.len, new_dentry->d_name.name,
227 new_dentry->d_name.len);
229 mkpi->mpi_total_size = tmp - (void*)msg;
230 rc = mkpi->mpi_total_size + sizeof(*mkpi) + sizeof(int);
234 typedef int (*mds_pack_rec_func)(char *buffer, struct dentry *dentry,
235 struct inode *dir, void *data1, void *data2);
237 static mds_pack_rec_func mds_kml_pack[REINT_MAX + 1] = {
238 [REINT_LINK] mds_rec_link_pack,
239 [REINT_SETATTR] mds_rec_setattr_pack,
240 [REINT_CREATE] mds_rec_create_pack,
241 [REINT_UNLINK] mds_rec_unlink_pack,
242 [REINT_RENAME] mds_rec_rename_pack,
245 int mds_rec_pack(char *buffer, struct dentry *dentry, struct inode *dir,
246 void *data1, void *data2, int op)
248 return mds_kml_pack[op](buffer, dentry, dir, data1, data2);
251 int mds_rec_pack_init(struct smfs_super_info *smsi)
254 smsi->smsi_pack_rec[PACK_MDS] = mds_rec_pack;