1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
5 * Lustre filesystem abstraction routines
7 * Copyright (C) 2004 Cluster File Systems, Inc.
9 * This file is part of Lustre, http://www.lustre.org.
11 * Lustre is free software; you can redistribute it and/or
12 * modify it under the terms of version 2 of the GNU General Public
13 * License as published by the Free Software Foundation.
15 * Lustre is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with Lustre; if not, write to the Free Software
22 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 # define EXPORT_SYMTAB
28 #define DEBUG_SUBSYSTEM S_SM
30 #include <linux/kmod.h>
31 #include <linux/init.h>
33 #include <linux/slab.h>
34 #include <linux/obd_class.h>
35 #include <linux/obd_support.h>
36 #include <linux/lustre_lib.h>
37 #include <linux/lustre_idl.h>
38 #include <linux/lustre_fsfilt.h>
39 #include <linux/lustre_smfs.h>
40 #include "smfs_internal.h"
42 smfs_pack_rec_func smfs_get_rec_pack_type(struct super_block *sb)
44 struct smfs_super_info *smsi = S2SMI(sb);
46 int index = GET_REC_PACK_TYPE_INDEX(smsi->smsi_flags);
48 return smsi->smsi_pack_rec[index];
51 int smfs_rec_init(struct super_block *sb)
53 struct smfs_super_info *smfs_info = S2SMI(sb);
56 SMFS_SET_REC(smfs_info);
58 ost_rec_pack_init(sb);
59 mds_rec_pack_init(sb);
64 int smfs_rec_cleanup(struct super_block *sb)
68 SMFS_CLEAN_REC(S2SMI(sb));
72 static inline void copy_inode_attr(struct iattr *iattr, struct inode *inode)
74 iattr->ia_mode = inode->i_mode;
75 iattr->ia_uid = inode->i_uid;
76 iattr->ia_gid = inode->i_gid;
77 iattr->ia_atime = inode->i_atime;
78 iattr->ia_ctime = inode->i_ctime;
79 iattr->ia_mtime = inode->i_mtime;
80 iattr->ia_size = inode->i_size;
83 static inline int unpack_rec_data(char **p_buffer, int *size,
84 char *in_data, char *args_data)
90 args_len = strlen(args_data);
92 *size = *((int*)(in_data));
93 rc = *size + sizeof(int);
95 OBD_ALLOC(*p_buffer, *size + args_len + 1);
98 /*First copy reint dir */
100 memcpy(*p_buffer, args_data, args_len);
102 /*then copy the node name */
103 memcpy(*p_buffer + args_len,
104 (in_data + sizeof(int)), *size);
111 int smfs_rec_unpack(struct smfs_proc_args *args, char *record,
112 char **pbuf, int *opcode)
114 int offset = *(int *)(record);
115 char *tmp = record + offset + sizeof(int);
117 *opcode = *(int *)tmp;
118 *pbuf = tmp + sizeof(*opcode);
121 EXPORT_SYMBOL(smfs_rec_unpack);
123 int smfs_start_rec(struct super_block *sb, struct vfsmount *mnt)
125 struct dentry *dentry;
126 struct lvfs_run_ctxt saved;
130 if (SMFS_INIT_REC(S2SMI(sb)) ||
131 (!SMFS_DO_REC(S2SMI(sb)) && !SMFS_CACHE_HOOK(S2SMI(sb))))
134 rc = smfs_llog_setup(sb, mnt);
137 push_ctxt(&saved, S2SMI(sb)->smsi_ctxt, NULL);
138 dentry = simple_mkdir(current->fs->pwd, "DELETE", 0777, 1);
139 if (IS_ERR(dentry)) {
140 rc = PTR_ERR(dentry);
141 CERROR("cannot create DELETE directory: rc = %d\n", rc);
142 GOTO(err_exit, rc = -EINVAL);
144 S2SMI(sb)->smsi_delete_dir = dentry;
147 SMFS_SET_INIT_REC(S2SMI(sb));
149 pop_ctxt(&saved, S2SMI(sb)->smsi_ctxt, NULL);
152 if (S2SMI(sb)->smsi_ctxt)
153 OBD_FREE(S2SMI(sb)->smsi_ctxt, sizeof(struct lvfs_run_ctxt));
156 EXPORT_SYMBOL(smfs_start_rec);
158 int smfs_post_setup(struct super_block *sb, struct vfsmount *mnt)
160 struct lvfs_run_ctxt *current_ctxt = NULL;
161 struct smfs_super_info *smb = S2SMI(sb);
163 OBD_ALLOC(current_ctxt, sizeof(*current_ctxt));
166 OBD_SET_CTXT_MAGIC(current_ctxt);
168 current_ctxt->pwdmnt = mnt;
169 current_ctxt->pwd = mnt->mnt_root;
170 current_ctxt->fs = get_ds();
171 smb->smsi_ctxt = current_ctxt;
175 EXPORT_SYMBOL(smfs_post_setup);
177 int smfs_post_cleanup(struct super_block *sb)
179 struct smfs_super_info *smb = S2SMI(sb);
184 OBD_FREE(S2SMI(sb)->smsi_ctxt, sizeof(struct lvfs_run_ctxt));
187 EXPORT_SYMBOL(smfs_post_cleanup);
189 int smfs_stop_rec(struct super_block *sb)
193 if (!SMFS_INIT_REC(S2SMI(sb)) ||
194 (!SMFS_DO_REC(S2SMI(sb)) && !SMFS_CACHE_HOOK(S2SMI(sb))))
197 rc = smfs_llog_cleanup(sb);
199 SMFS_CLEAN_INIT_REC(S2SMI(sb));
201 if (S2SMI(sb)->smsi_delete_dir) {
202 l_dput(S2SMI(sb)->smsi_delete_dir);
203 S2SMI(sb)->smsi_delete_dir = NULL;
207 EXPORT_SYMBOL(smfs_stop_rec);
209 int smfs_write_extents(struct inode *dir, struct dentry *dentry,
210 unsigned long from, unsigned long num)
212 return smfs_post_rec_write(dir, dentry, &from, &num);
214 EXPORT_SYMBOL(smfs_write_extents);
216 int smfs_rec_setattr(struct inode *dir, struct dentry *dentry,
219 return smfs_post_rec_setattr(dir, dentry, attr, NULL);
221 EXPORT_SYMBOL(smfs_rec_setattr);
223 int smfs_rec_md(struct inode *inode, void * lmm, int lmm_size)
225 char *set_lmm = NULL;
230 OBD_ALLOC(set_lmm, lmm_size + sizeof(lmm_size));
233 memcpy(set_lmm, &lmm_size, sizeof(lmm_size));
234 memcpy(set_lmm + sizeof(lmm_size), lmm, lmm_size);
235 rc = smfs_post_rec_setattr(inode, NULL, NULL, set_lmm);
237 CERROR("Error: Record md for inode %lu rc=%d\n",
242 OBD_FREE(set_lmm, lmm_size + sizeof(lmm_size));
245 EXPORT_SYMBOL(smfs_rec_md);
247 int smfs_rec_precreate(struct dentry *dentry, int *num, struct obdo *oa)
249 return smfs_post_rec_create(dentry->d_inode, dentry, num, oa);
251 EXPORT_SYMBOL(smfs_rec_precreate);
253 int smfs_process_rec(struct super_block *sb,
254 int count, char *dir, int flags)
256 struct llog_ctxt *ctxt;
257 struct llog_handle *loghandle;
258 struct smfs_proc_args args;
261 if (!SMFS_INIT_REC(S2SMI(sb))) {
262 CWARN("Did not start up rec server \n");
266 memset(&args, 0, sizeof(struct smfs_proc_args));
268 args.sr_count = count;
270 args.sr_flags = flags ;
271 ctxt = S2SMI(sb)->smsi_rec_log;
272 loghandle = ctxt->loc_handle;
275 if (SMFS_DO_REINT_REC(flags)) {
276 struct llog_gen_rec *lgr;
278 /*For reint rec, we need insert
279 *a gen rec to identify the end
281 OBD_ALLOC(lgr, sizeof(*lgr));
284 lgr->lgr_hdr.lrh_len = lgr->lgr_tail.lrt_len = sizeof(*lgr);
285 lgr->lgr_hdr.lrh_type = LLOG_GEN_REC;
286 lgr->lgr_gen = ctxt->loc_gen;
287 rc = llog_add(ctxt, &lgr->lgr_hdr, NULL, NULL, 1,
289 OBD_FREE(lgr, sizeof(*lgr));
294 SET_REC_COUNT_FLAGS(args.sr_flags, SMFS_REC_ALL);
297 if (SMFS_DO_REINT_REC(flags))
298 rc = llog_cat_process(loghandle, ctxt->llog_proc_cb,
301 rc = llog_cat_reverse_process(loghandle,
304 if (rc == LLOG_PROC_BREAK)