1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (C) 2001-2003 Cluster File Systems, Inc. <info@clusterfs.com>
6 * This file is part of Lustre, http://www.lustre.org.
8 * Lustre is free software; you can redistribute it and/or
9 * modify it under the terms of version 2 of the GNU General Public
10 * License as published by the Free Software Foundation.
12 * Lustre is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with Lustre; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 * smfs data structures.
22 * See also lustre_idl.h for wire formats of requests.
26 #ifndef __LUSTRE_SMFS_H
27 #define __LUSTRE_SMFS_H
29 struct snap_inode_info {
30 int sn_flags; /* the flags indicated inode type */
31 int sn_gen; /*the inode generation*/
34 struct smfs_inode_info {
35 struct inode *smi_inode;
37 struct snap_inode_info sm_sninfo;
40 struct journal_operations {
41 void *(*tr_start)(struct inode *, int op);
42 void (*tr_commit)(void *handle);
45 struct sm_operations {
46 /* operations on the file store */
47 struct super_operations sm_sb_ops;
48 struct inode_operations sm_dir_iops;
49 struct inode_operations sm_file_iops;
50 struct inode_operations sm_sym_iops;
51 struct file_operations sm_dir_fops;
52 struct file_operations sm_file_fops;
53 struct file_operations sm_sym_fops;
54 struct dentry_operations sm_dentry_ops;
55 struct journal_operations sm_journal_ops;
59 typedef int (*smfs_pack_rec_func)(char *buffer, struct dentry *dentry,
60 struct inode *dir, void *data1,
69 struct mds_kml_pack_info {
75 struct smfs_super_info {
76 struct super_block *smsi_sb;
77 struct vfsmount *smsi_mnt; /* mount the cache kern */
78 struct fsfilt_operations *sm_cache_fsfilt; /* fsfilt operations */
79 struct fsfilt_operations *sm_fsfilt; /* fsfilt operations */
80 struct sm_operations *sm_ops; /* cache ops */
81 struct lvfs_run_ctxt *smsi_ctxt;
82 struct llog_ctxt *smsi_rec_log; /* smfs kml llog */
83 struct dentry *smsi_logs_dir;
84 struct dentry *smsi_objects_dir;
85 struct dentry *smsi_delete_dir; /* for delete inode dir */
86 char *smsi_cache_ftype; /* cache file system type */
87 char *smsi_ftype; /* file system type */
88 struct obd_export *smsi_exp; /* file system obd exp */
89 struct snap_info *smsi_snap_info; /* snap table cow */
90 smfs_pack_rec_func smsi_pack_rec[PACK_MAX]; /* sm_pack_rec type ops */
91 __u32 smsi_flags; /* flags */
95 #define SMFS_FILE_TYPE "smfs"
96 #define SMFS_FILE_MAGIC 0x19760218
98 struct smfs_file_info {
103 struct smfs_proc_args {
104 struct super_block *sr_sb;
110 __u32 e_block; /* first logical block extent covers */
111 __u32 e_start; /* first physical block extents lives */
112 __u32 e_num; /* number of blocks covered by extent */
115 #define I2SMI(inode) ((struct smfs_inode_info *) (&(inode->u.generic_ip)))
116 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
117 #define S2SMI(sb) ((struct smfs_super_info *) (&(sb->u.generic_sbp)))
118 #define S2CSB(sb) (((struct smfs_super_info *) (&(sb->u.generic_sbp)))->smsi_sb)
120 #define S2SMI(sb) ((struct smfs_super_info *) (sb->s_fs_info))
121 #define S2CSB(sb) (((struct smfs_super_info *) (sb->s_fs_info))->smsi_sb)
124 #define I2CI(inode) (((struct smfs_inode_info*) (&(inode->u.generic_ip)))->smi_inode)
126 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
127 #define I2CSB(inode) ((struct smfs_super_info *) (&(inode->i_sb->u.generic_sbp)))
129 #define I2CSB(inode) ((struct smfs_super_info *) (inode->i_sb->s_fs_info))
132 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
133 #define I2FOPS(inode) (((struct smfs_super_info *) \
134 (&(inode->i_sb->u.generic_sbp)))->sm_cache_fsfilt)
136 #define I2FOPS(inode) (((struct smfs_super_info *) \
137 (inode->i_sb->s_fs_info))->sm_cache_fsfilt)
140 #define I2SNAPOPS(inode) ((S2SMI(inode->i_sb))->smsi_snap_info->snap_cache_fsfilt)
142 #define S2SNAPI(sb) (S2SMI(sb)->smsi_snap_info)
143 #define F2SMFI(file) ((struct smfs_file_info *)((file->private_data)))
144 #define F2CF(file) (((struct smfs_file_info *) ((file->private_data)))->c_file)
145 #define SIZE2BLKS(size, inode) ((size + (I2CI(inode)->i_blksize)) >> (I2CI(inode)->i_blkbits))
146 #define OFF2BLKS(off, inode) (off >> (I2CI(inode)->i_blkbits))
148 #define SM_DO_REC 0x1
149 #define SM_INIT_REC 0x2
150 #define SM_CACHE_HOOK 0x4
151 #define SM_OVER_WRITE 0x8
152 #define SM_DIRTY_WRITE 0x10
153 #define SM_DO_COW 0x20
155 #define SMFS_DO_REC(smfs_info) (smfs_info->smsi_flags & SM_DO_REC)
156 #define SMFS_SET_REC(smfs_info) (smfs_info->smsi_flags |= SM_DO_REC)
157 #define SMFS_CLEAN_REC(smfs_info) (smfs_info->smsi_flags &= ~SM_DO_REC)
159 #define SMFS_INIT_REC(smfs_info) (smfs_info->smsi_flags & SM_INIT_REC)
160 #define SMFS_SET_INIT_REC(smfs_info) (smfs_info->smsi_flags |= SM_INIT_REC)
161 #define SMFS_CLEAN_INIT_REC(smfs_info) (smfs_info->smsi_flags &= ~SM_INIT_REC)
163 #define SMFS_SET_INODE_REC(inode) (I2SMI(inode)->smi_flags |= SM_DO_REC)
164 #define SMFS_DO_INODE_REC(inode) (I2SMI(inode)->smi_flags & SM_DO_REC)
165 #define SMFS_CLEAN_INODE_REC(inode) (I2SMI(inode)->smi_flags &= ~SM_DO_REC)
167 #define SMFS_CACHE_HOOK(smfs_info) (smfs_info->smsi_flags & SM_CACHE_HOOK)
168 #define SMFS_SET_CACHE_HOOK(smfs_info) (smfs_info->smsi_flags |= SM_CACHE_HOOK)
169 #define SMFS_CLEAN_CACHE_HOOK(smfs_info) (smfs_info->smsi_flags &= ~SM_CACHE_HOOK)
171 #define SMFS_INODE_CACHE_HOOK(inode) (I2SMI(inode)->smi_flags & SM_CACHE_HOOK)
172 #define SMFS_SET_INODE_CACHE_HOOK(inode) (I2SMI(inode)->smi_flags |= SM_CACHE_HOOK)
173 #define SMFS_CLEAN_INODE_CACHE_HOOK(inode) (I2SMI(inode)->smi_flags &= ~SM_CACHE_HOOK)
175 #define SMFS_INODE_OVER_WRITE(inode) (I2SMI(inode)->smi_flags & SM_OVER_WRITE)
176 #define SMFS_SET_INODE_OVER_WRITE(inode) (I2SMI(inode)->smi_flags |= SM_OVER_WRITE)
177 #define SMFS_CLEAN_INODE_OVER_WRITE(inode) (I2SMI(inode)->smi_flags &= ~SM_OVER_WRITE)
179 #define SMFS_INODE_DIRTY_WRITE(inode) (I2SMI(inode)->smi_flags & SM_DIRTY_WRITE)
180 #define SMFS_SET_INODE_DIRTY_WRITE(inode) (I2SMI(inode)->smi_flags |= SM_DIRTY_WRITE)
181 #define SMFS_CLEAN_INODE_DIRTY_WRITE(inode) (I2SMI(inode)->smi_flags &= ~SM_DIRTY_WRITE)
183 #define SMFS_DO_COW(smfs_info) (smfs_info->smsi_flags & SM_DO_COW)
184 #define SMFS_SET_COW(smfs_info) (smfs_info->smsi_flags |= SM_DO_COW)
185 #define SMFS_CLEAN_COW(smfs_info) (smfs_info->smsi_flags &= ~SM_DO_COW)
187 #define SMFS_SET_INODE_COW(inode) (I2SMI(inode)->smi_flags |= SM_DO_COW)
188 #define SMFS_DO_INODE_COW(inode) (I2SMI(inode)->smi_flags & SM_DO_COW)
189 #define SMFS_CLEAN_INODE_COW(inode) (I2SMI(inode)->smi_flags &= ~SM_DO_COW)
191 #define LVFS_SMFS_BACK_ATTR "lvfs_back_attr"
194 #define REC_COUNT_BIT 0
195 #define REC_COUNT_MASK 0x01 /*0001*/
197 #define REC_OP_MASK 0x06 /*0110*/
198 #define REC_WRITE_KML_BIT 3
199 #define REC_WRITE_KML_MASK 0x08 /*1000*/
200 #define REC_DEC_LINK_BIT 4
201 #define REC_DEC_LINK_MASK 0x10 /*10000* different with unlink*/
202 #define REC_GET_OID_BIT 5
203 #define REC_GET_OID_MASK 0x20 /*100000*/
205 #define REC_PACK_TYPE_BIT 6
206 #define REC_PACK_TYPE_MASK 0x1C0 /*111000000*/
208 #define SET_REC_COUNT_FLAGS(flag, count_flag) \
209 (flag |= count_flag << REC_COUNT_BIT)
210 #define GET_REC_COUNT_FLAGS(flag) \
211 ((flag & REC_COUNT_MASK) >> REC_COUNT_BIT)
213 #define SET_REC_OP_FLAGS(flag, op_flag) \
214 (flag |= op_flag << REC_OP_BIT)
215 #define GET_REC_OP_FLAGS(flag) \
216 ((flag & REC_OP_MASK) >> REC_OP_BIT)
218 #define SET_REC_WRITE_KML_FLAGS(flag, op_flag) \
219 (flag |= op_flag << REC_OP_BIT)
220 #define GET_REC_WRITE_KML_FLAGS(flag) \
221 ((flag & REC_WRITE_KML_MASK) >> REC_WRITE_KML_BIT)
223 #define SET_REC_DEC_LINK_FLAGS(flag, op_flag) \
224 (flag |= op_flag << REC_DEC_LINK_BIT)
225 #define GET_REC_DEC_LINK_FLAGS(flag) \
226 ((flag & REC_DEC_LINK_MASK) >> REC_DEC_LINK_BIT)
228 #define SET_REC_GET_ID_FLAGS(flag, op_flag) \
229 (flag |= op_flag << REC_GET_OID_BIT)
230 #define GET_REC_GET_OID_FLAGS(flag) \
231 ((flag & REC_GET_OID_MASK) >> REC_GET_OID_BIT)
233 #define SET_REC_PACK_TYPE_INDEX(flag, op_flag) \
234 (flag |= op_flag << REC_PACK_TYPE_BIT)
235 #define GET_REC_PACK_TYPE_INDEX(flag) \
236 ((flag & REC_PACK_TYPE_MASK) >> REC_PACK_TYPE_BIT)
238 #define SMFS_REC_ALL 0x1
239 #define SMFS_REC_BY_COUNT 0x0
241 #define SMFS_REINT_REC 0x1
242 #define SMFS_UNDO_REC 0x2
244 #define SMFS_WRITE_KML 0x1
245 #define SMFS_DEC_LINK 0x1
246 #define SMFS_GET_OID 0x1
248 #define SMFS_DO_REINT_REC(flag) \
249 (GET_REC_OP_FLAGS(flag) == SMFS_REINT_REC)
250 #define SMFS_DO_UNDO_REC(flag) \
251 (GET_REC_OP_FLAGS(flag) == SMFS_UNDO_REC)
252 #define SMFS_DO_REC_ALL(flag) \
253 (GET_REC_COUNT_FLAGS(flag) == SMFS_REC_ALL)
254 #define SMFS_DO_REC_BY_COUNT(flag) \
255 (GET_REC_COUNT_FLAGS(flag) == SMFS_REC_BY_COUNT)
256 #define SMFS_DO_WRITE_KML(flag) \
257 (GET_REC_WRITE_KML_FLAGS(flag) == SMFS_WRITE_KML)
258 #define SMFS_DO_DEC_LINK(flag) \
259 (GET_REC_DEC_LINK_FLAGS(flag) == SMFS_DEC_LINK)
261 #define SMFS_DO_GET_OID(flag) \
262 (GET_REC_GET_OID_FLAGS(flag) == SMFS_GET_OID)
264 /*DIRTY flags of write ops*/
265 #define REINT_EXTENTS_FLAGS "replay_flags"
266 #define SMFS_DIRTY_WRITE 0x01
267 #define SMFS_OVER_WRITE 0x02
270 static inline void duplicate_inode(struct inode *dst_inode,
271 struct inode *src_inode)
273 dst_inode->i_mode = src_inode->i_mode;
274 dst_inode->i_uid = src_inode->i_uid;
275 dst_inode->i_gid = src_inode->i_gid;
276 dst_inode->i_nlink = src_inode->i_nlink;
277 dst_inode->i_size = src_inode->i_size;
278 dst_inode->i_atime = src_inode->i_atime;
279 dst_inode->i_ctime = src_inode->i_ctime;
280 dst_inode->i_mtime = src_inode->i_mtime;
281 dst_inode->i_blksize = src_inode->i_blksize;
282 dst_inode->i_version = src_inode->i_version;
283 dst_inode->i_state = src_inode->i_state;
284 dst_inode->i_generation = src_inode->i_generation;
286 /* This is to make creating special files working. */
287 dst_inode->i_rdev = src_inode->i_rdev;
290 static inline void post_smfs_inode(struct inode *inode,
291 struct inode *cache_inode)
293 if (inode && cache_inode) {
294 duplicate_inode(inode, cache_inode);
295 /*Here we must release the cache_inode,
296 *Otherwise we will have no chance to
299 cache_inode->i_state &=~I_LOCK;
300 inode->i_blocks = cache_inode->i_blocks;
304 static inline void pre_smfs_inode(struct inode *inode,
305 struct inode *cache_inode)
307 if (inode && cache_inode)
308 duplicate_inode(cache_inode, inode);
311 /* instantiate a file handle to the cache file */
312 static inline void duplicate_file(struct file *dst_file, struct file *src_file)
314 if (dst_file && src_file) {
315 dst_file->f_pos = src_file->f_pos;
316 dst_file->f_mode = src_file->f_mode;
317 dst_file->f_flags = src_file->f_flags;
318 dst_file->f_owner = src_file->f_owner;
319 dst_file->f_vfsmnt = src_file->f_vfsmnt;
321 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
322 dst_file->f_reada = src_file->f_reada;
323 dst_file->f_ramax = src_file->f_ramax;
324 dst_file->f_raend = src_file->f_raend;
325 dst_file->f_ralen = src_file->f_ralen;
326 dst_file->f_rawin = src_file->f_rawin;
328 dst_file->f_ra = src_file->f_ra;
333 static inline void duplicate_sb(struct super_block *dst_sb,
334 struct super_block *src_sb)
336 dst_sb->s_blocksize = src_sb->s_blocksize;
337 dst_sb->s_magic = src_sb->s_magic;
338 dst_sb->s_blocksize_bits = src_sb->s_blocksize_bits;
339 dst_sb->s_maxbytes = src_sb->s_maxbytes;
342 static inline void d_unalloc(struct dentry *dentry)
344 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
345 list_del(&dentry->d_hash);
346 INIT_LIST_HEAD(&dentry->d_hash);
348 hlist_del_init(&dentry->d_hash);
350 dput(dentry); /* this will free the dentry memory */
353 static inline struct dentry *pre_smfs_dentry(struct dentry *parent_dentry,
354 struct inode *cache_inode,
355 struct dentry *dentry)
357 struct dentry *cache_dentry = NULL;
359 cache_dentry = d_alloc(parent_dentry, &dentry->d_name);
363 cache_dentry->d_parent = cache_dentry;
365 d_add(cache_dentry, cache_inode);
366 RETURN(cache_dentry);
369 static inline void post_smfs_dentry(struct dentry *cache_dentry)
373 if (cache_dentry->d_inode)
374 igrab(cache_dentry->d_inode);
375 d_unalloc(cache_dentry);
378 static inline int lookup_by_path(char *path, int flags, struct nameidata *nd)
380 struct dentry *dentry = NULL;
383 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
384 if (path_init(path, flags, nd)) {
386 if (path_lookup(path, flags, nd)) {
388 rc = path_walk(path, nd);
397 if (!dentry->d_inode || is_bad_inode(dentry->d_inode)) {
404 /*FIXME there should be more conditions in this check*/
405 static inline int smfs_do_rec(struct inode *inode)
407 struct super_block *sb = inode->i_sb;
408 struct smfs_super_info *smfs_info = S2SMI(sb);
410 if (SMFS_DO_REC(smfs_info) && SMFS_INIT_REC(smfs_info) &&
411 SMFS_DO_INODE_REC(inode))
416 static inline int smfs_cache_hook(struct inode *inode)
418 struct smfs_super_info *smfs_info = I2CSB(inode);
420 if (SMFS_CACHE_HOOK(smfs_info) && SMFS_INIT_REC(smfs_info) &&
421 SMFS_INODE_CACHE_HOOK(inode))
427 static inline int smfs_do_cow(struct inode *inode)
429 struct super_block *sb = inode->i_sb;
430 struct smfs_super_info *smfs_info = S2SMI(sb);
432 if (SMFS_DO_COW(smfs_info) && SMFS_DO_INODE_COW(inode))
437 /* XXX BUG 3188 -- must return to one set of opcodes */
438 #define SMFS_TRANS_OP(inode, op) \
440 if (smfs_do_rec(inode)) \
442 if (smfs_cache_hook(inode)) \
446 extern int smfs_start_rec(struct super_block *sb, struct vfsmount *mnt);
447 extern int smfs_stop_rec(struct super_block *sb);
448 extern int smfs_write_extents(struct inode *dir, struct dentry *dentry,
449 unsigned long from, unsigned long num);
450 extern int smfs_rec_setattr(struct inode *dir, struct dentry *dentry,
452 extern int smfs_rec_precreate(struct dentry *dentry, int *num, struct obdo *oa);
453 extern int smfs_rec_md(struct inode *inode, void * lmm, int lmm_size);
454 extern int smfs_rec_unpack(struct smfs_proc_args *args, char *record,
455 char **pbuf, int *opcode);
457 int smfs_cow(struct inode *dir, struct dentry *dentry, int op);
459 #endif /* _LUSTRE_SMFS_H */