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];
50 static int smfs_rec_post_hook(struct inode *inode, struct dentry *dentry,
51 void *data1, void *data2, int op, void *handle)
56 if (smfs_do_rec(inode))
57 rc = smfs_post_kml_rec(inode, dentry, data1, data2, op);
62 #define KML_HOOK "kml_hook"
63 int smfs_rec_init(struct super_block *sb)
65 struct smfs_super_info *smfs_info = S2SMI(sb);
66 struct smfs_hook_ops *rec_hops = NULL;
69 SMFS_SET_REC(smfs_info);
71 ost_rec_pack_init(sb);
72 mds_rec_pack_init(sb);
74 rec_hops = smfs_alloc_hook_ops(KML_HOOK, NULL, smfs_rec_post_hook);
79 rc = smfs_register_hook_ops(sb, rec_hops);
82 smfs_unregister_hook_ops(sb, rec_hops->smh_name);
83 smfs_free_hook_ops(rec_hops);
88 int smfs_rec_cleanup(struct super_block *sb)
90 struct smfs_hook_ops *rec_hops;
93 rec_hops = smfs_unregister_hook_ops(sb, KML_HOOK);
94 smfs_free_hook_ops(rec_hops);
95 SMFS_CLEAN_REC(S2SMI(sb));
100 static inline void copy_inode_attr(struct iattr *iattr, struct inode *inode)
102 iattr->ia_mode = inode->i_mode;
103 iattr->ia_uid = inode->i_uid;
104 iattr->ia_gid = inode->i_gid;
105 iattr->ia_atime = inode->i_atime;
106 iattr->ia_ctime = inode->i_ctime;
107 iattr->ia_mtime = inode->i_mtime;
108 iattr->ia_size = inode->i_size;
111 static inline int unpack_rec_data(char **p_buffer, int *size,
112 char *in_data, char *args_data)
118 args_len = strlen(args_data);
120 *size = *((int*)(in_data));
121 rc = *size + sizeof(int);
123 OBD_ALLOC(*p_buffer, *size + args_len + 1);
126 /*First copy reint dir */
128 memcpy(*p_buffer, args_data, args_len);
130 /*then copy the node name */
131 memcpy(*p_buffer + args_len,
132 (in_data + sizeof(int)), *size);
139 int smfs_rec_unpack(struct smfs_proc_args *args, char *record,
140 char **pbuf, int *opcode)
142 int offset = *(int *)(record);
143 char *tmp = record + offset + sizeof(int);
145 *opcode = *(int *)tmp;
146 *pbuf = tmp + sizeof(*opcode);
149 EXPORT_SYMBOL(smfs_rec_unpack);
151 int smfs_start_rec(struct super_block *sb, struct vfsmount *mnt)
153 struct dentry *dentry;
154 struct lvfs_run_ctxt saved;
158 if (SMFS_INIT_REC(S2SMI(sb)) ||
159 (!SMFS_DO_REC(S2SMI(sb)) && !SMFS_CACHE_HOOK(S2SMI(sb))))
162 rc = smfs_llog_setup(sb, mnt);
165 push_ctxt(&saved, S2SMI(sb)->smsi_ctxt, NULL);
166 dentry = simple_mkdir(current->fs->pwd, "DELETE", 0777, 1);
167 if (IS_ERR(dentry)) {
168 rc = PTR_ERR(dentry);
169 CERROR("cannot create DELETE directory: rc = %d\n", rc);
170 GOTO(err_exit, rc = -EINVAL);
172 S2SMI(sb)->smsi_delete_dir = dentry;
175 SMFS_SET_INIT_REC(S2SMI(sb));
177 pop_ctxt(&saved, S2SMI(sb)->smsi_ctxt, NULL);
180 if (S2SMI(sb)->smsi_ctxt)
181 OBD_FREE(S2SMI(sb)->smsi_ctxt, sizeof(struct lvfs_run_ctxt));
184 EXPORT_SYMBOL(smfs_start_rec);
186 int smfs_post_setup(struct super_block *sb, struct vfsmount *mnt)
188 struct lvfs_run_ctxt *current_ctxt = NULL;
189 struct smfs_super_info *smb = S2SMI(sb);
191 OBD_ALLOC(current_ctxt, sizeof(*current_ctxt));
194 OBD_SET_CTXT_MAGIC(current_ctxt);
196 current_ctxt->pwdmnt = mnt;
197 current_ctxt->pwd = mnt->mnt_root;
198 current_ctxt->fs = get_ds();
199 smb->smsi_ctxt = current_ctxt;
203 EXPORT_SYMBOL(smfs_post_setup);
205 int smfs_post_cleanup(struct super_block *sb)
207 struct smfs_super_info *smb = S2SMI(sb);
212 OBD_FREE(S2SMI(sb)->smsi_ctxt, sizeof(struct lvfs_run_ctxt));
215 EXPORT_SYMBOL(smfs_post_cleanup);
217 int smfs_stop_rec(struct super_block *sb)
221 if (!SMFS_INIT_REC(S2SMI(sb)) ||
222 (!SMFS_DO_REC(S2SMI(sb)) && !SMFS_CACHE_HOOK(S2SMI(sb))))
225 rc = smfs_llog_cleanup(sb);
227 SMFS_CLEAN_INIT_REC(S2SMI(sb));
229 if (S2SMI(sb)->smsi_delete_dir) {
230 l_dput(S2SMI(sb)->smsi_delete_dir);
231 S2SMI(sb)->smsi_delete_dir = NULL;
235 EXPORT_SYMBOL(smfs_stop_rec);
237 int smfs_write_extents(struct inode *dir, struct dentry *dentry,
238 unsigned long from, unsigned long num)
240 return smfs_post_rec_write(dir, dentry, &from, &num);
242 EXPORT_SYMBOL(smfs_write_extents);
244 int smfs_rec_setattr(struct inode *dir, struct dentry *dentry,
247 return smfs_post_rec_setattr(dir, dentry, attr, NULL);
249 EXPORT_SYMBOL(smfs_rec_setattr);
251 int smfs_rec_md(struct inode *inode, void * lmm, int lmm_size)
253 char *set_lmm = NULL;
258 OBD_ALLOC(set_lmm, lmm_size + sizeof(lmm_size));
261 memcpy(set_lmm, &lmm_size, sizeof(lmm_size));
262 memcpy(set_lmm + sizeof(lmm_size), lmm, lmm_size);
263 rc = smfs_post_rec_setattr(inode, NULL, NULL, set_lmm);
265 CERROR("Error: Record md for inode %lu rc=%d\n",
270 OBD_FREE(set_lmm, lmm_size + sizeof(lmm_size));
273 EXPORT_SYMBOL(smfs_rec_md);
275 int smfs_rec_precreate(struct dentry *dentry, int *num, struct obdo *oa)
277 return smfs_post_rec_create(dentry->d_inode, dentry, num, oa);
279 EXPORT_SYMBOL(smfs_rec_precreate);
281 int smfs_process_rec(struct super_block *sb,
282 int count, char *dir, int flags)
284 struct llog_ctxt *ctxt;
285 struct llog_handle *loghandle;
286 struct smfs_proc_args args;
289 if (!SMFS_INIT_REC(S2SMI(sb))) {
290 CWARN("Did not start up rec server \n");
294 memset(&args, 0, sizeof(struct smfs_proc_args));
296 args.sr_count = count;
298 args.sr_flags = flags ;
299 ctxt = S2SMI(sb)->smsi_rec_log;
300 loghandle = ctxt->loc_handle;
303 if (SMFS_DO_REINT_REC(flags)) {
304 struct llog_gen_rec *lgr;
306 /*For reint rec, we need insert
307 *a gen rec to identify the end
309 OBD_ALLOC(lgr, sizeof(*lgr));
312 lgr->lgr_hdr.lrh_len = lgr->lgr_tail.lrt_len = sizeof(*lgr);
313 lgr->lgr_hdr.lrh_type = LLOG_GEN_REC;
314 lgr->lgr_gen = ctxt->loc_gen;
315 rc = llog_add(ctxt, &lgr->lgr_hdr, NULL, NULL, 1,
317 OBD_FREE(lgr, sizeof(*lgr));
322 SET_REC_COUNT_FLAGS(args.sr_flags, SMFS_REC_ALL);
325 if (SMFS_DO_REINT_REC(flags))
326 rc = llog_cat_process(loghandle, ctxt->llog_proc_cb,
329 rc = llog_cat_reverse_process(loghandle,
332 if (rc == LLOG_PROC_BREAK)