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*/
32 int sn_index; /*the inode snap_index*/
33 ino_t sn_root_ino; /*the root ino of this snap*/
35 struct smfs_inode_info {
36 /* this first part of struct should be the same as in mds_info_info */
37 struct lustre_id smi_id;
40 struct inode *smi_inode;
42 struct snap_inode_info sm_sninfo;
45 struct journal_operations {
46 void *(*tr_start)(struct inode *, int op);
47 void (*tr_commit)(void *handle);
50 struct sm_operations {
51 /* operations on the file store */
52 struct super_operations sm_sb_ops;
53 struct inode_operations sm_dir_iops;
54 struct inode_operations sm_file_iops;
55 struct inode_operations sm_sym_iops;
56 struct inode_operations sm_special_iops;
57 struct file_operations sm_dir_fops;
58 struct file_operations sm_file_fops;
59 struct file_operations sm_sym_fops;
60 struct dentry_operations sm_dentry_ops;
61 struct journal_operations sm_journal_ops;
65 typedef int (*smfs_pack_rec_func)(char *buffer, struct dentry *dentry,
66 struct inode *dir, void *data1,
75 struct mds_kml_pack_info {
81 struct smfs_super_info {
82 struct super_block *smsi_sb;
83 struct vfsmount *smsi_mnt; /* mount the cache kern */
84 struct fsfilt_operations *sm_cache_fsfilt; /* fsfilt operations */
85 struct fsfilt_operations *sm_fsfilt; /* fsfilt operations */
86 struct sm_operations *sm_ops; /* cache ops */
87 struct lvfs_run_ctxt *smsi_ctxt;
88 struct llog_ctxt *smsi_kml_log; /* smfs kml llog */
89 struct dentry *smsi_logs_dir;
90 struct dentry *smsi_objects_dir;
91 char *smsi_cache_ftype; /* cache file system type */
92 char *smsi_ftype; /* file system type */
93 struct obd_export *smsi_exp; /* file system obd exp */
94 struct snap_super_info *smsi_snap_info; /* snap table cow */
95 smfs_pack_rec_func smsi_pack_rec[PACK_MAX]; /* sm_pack_rec type ops */
96 __u32 plg_flags; /* flags */
99 struct list_head smsi_plg_list;
100 kmem_cache_t * smsi_inode_cachep; /*inode_cachep*/
104 #define SMFS_FILE_TYPE "smfs"
105 #define SMFS_FILE_MAGIC 0x19760218
107 struct smfs_file_info {
112 struct smfs_proc_args {
113 struct super_block *sr_sb;
119 __u32 e_block; /* first logical block extent covers */
120 __u32 e_start; /* first physical block extents lives */
121 __u32 e_num; /* number of blocks covered by extent */
124 #define I2SMI(inode) ((struct smfs_inode_info *) ((inode->u.generic_ip)))
125 #define I2FSI(inode) (((inode->u.generic_ip)))
127 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
128 #define S2FSI(sb) (((sb->u.generic_sbp)))
129 #define S2SMI(sb) ((struct smfs_super_info *) ((sb->u.generic_sbp)))
130 #define S2CSB(sb) (((struct smfs_super_info *)((sb->u.generic_sbp)))->smsi_sb)
132 #define S2FSI(sb) ((sb->s_fs_info))
133 #define S2SMI(sb) ((struct smfs_super_info *) (sb->s_fs_info))
134 #define S2CSB(sb) (((struct smfs_super_info *) (sb->s_fs_info))->smsi_sb)
137 #define I2CI(inode) (((struct smfs_inode_info*) ((inode->u.generic_ip)))->smi_inode)
139 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
140 #define I2CSB(inode) ((struct smfs_super_info *) ((inode->i_sb->u.generic_sbp)))
142 #define I2CSB(inode) ((struct smfs_super_info *) (inode->i_sb->s_fs_info))
145 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
146 #define I2FOPS(inode) (((struct smfs_super_info *) \
147 ((inode->i_sb->u.generic_sbp)))->sm_cache_fsfilt)
149 #define I2FOPS(inode) (((struct smfs_super_info *) \
150 (inode->i_sb->s_fs_info))->sm_cache_fsfilt)
153 #define I2SNAPI(inode) (&(I2SMI(inode)->sm_sninfo))
154 #define I2SNAPCOPS(inode) ((S2SMI(inode->i_sb))->smsi_snap_info->snap_cache_fsfilt)
155 #define I2SNAPOPS(inode) ((S2SMI(inode->i_sb))->smsi_snap_info->snap_fsfilt)
157 #define S2SNAPI(sb) (S2SMI(sb)->smsi_snap_info)
158 #define F2SMFI(file) ((struct smfs_file_info *)((file->private_data)))
159 #define F2CF(file) (((struct smfs_file_info *) ((file->private_data)))->c_file)
160 #define SIZE2BLKS(size, inode) ((size + (I2CI(inode)->i_blksize)) >> (I2CI(inode)->i_blkbits))
161 #define OFF2BLKS(off, inode) (off >> (I2CI(inode)->i_blkbits))
163 /* SMFS external flags and methods */
164 #define SM_ALL_PLG 0x80L
165 #define SM_PRECREATE 0x100L
167 #define SM_DO_REC 0x1
168 #define SM_INIT_REC 0x2
169 #define SM_CACHE_HOOK 0x4
170 #define SM_OVER_WRITE 0x8
171 #define SM_DIRTY_WRITE 0x10
172 #define SM_DO_COW 0x20
173 #define SM_DO_COWED 0x40
175 #define SMFS_DO_REC(smfs_info) (smfs_info->smsi_flags & SM_DO_REC)
176 #define SMFS_SET_REC(smfs_info) (smfs_info->smsi_flags |= SM_DO_REC)
177 #define SMFS_CLEAN_REC(smfs_info) (smfs_info->smsi_flags &= ~SM_DO_REC)
179 #define SMFS_INIT_REC(smfs_info) (smfs_info->smsi_flags & SM_INIT_REC)
180 #define SMFS_SET_INIT_REC(smfs_info) (smfs_info->smsi_flags |= SM_INIT_REC)
181 #define SMFS_CLEAN_INIT_REC(smfs_info) (smfs_info->smsi_flags &= ~SM_INIT_REC)
183 #define SMFS_SET_INODE_REC(inode) (I2SMI(inode)->smi_flags |= SM_DO_REC)
184 #define SMFS_DO_INODE_REC(inode) (I2SMI(inode)->smi_flags & SM_DO_REC)
185 #define SMFS_CLEAN_INODE_REC(inode) (I2SMI(inode)->smi_flags &= ~SM_DO_REC)
187 #define SMFS_CACHE_HOOK(smfs_info) (smfs_info->smsi_flags & SM_CACHE_HOOK)
188 #define SMFS_SET_CACHE_HOOK(smfs_info) (smfs_info->smsi_flags |= SM_CACHE_HOOK)
189 #define SMFS_CLEAN_CACHE_HOOK(smfs_info) (smfs_info->smsi_flags &= ~SM_CACHE_HOOK)
191 #define SMFS_INODE_CACHE_HOOK(inode) (I2SMI(inode)->smi_flags & SM_CACHE_HOOK)
192 #define SMFS_SET_INODE_CACHE_HOOK(inode) (I2SMI(inode)->smi_flags |= SM_CACHE_HOOK)
193 #define SMFS_CLEAN_INODE_CACHE_HOOK(inode) (I2SMI(inode)->smi_flags &= ~SM_CACHE_HOOK)
195 #define SMFS_INODE_OVER_WRITE(inode) (I2SMI(inode)->smi_flags & SM_OVER_WRITE)
196 #define SMFS_SET_INODE_OVER_WRITE(inode) (I2SMI(inode)->smi_flags |= SM_OVER_WRITE)
197 #define SMFS_CLEAN_INODE_OVER_WRITE(inode) (I2SMI(inode)->smi_flags &= ~SM_OVER_WRITE)
199 #define SMFS_INODE_DIRTY_WRITE(inode) (I2SMI(inode)->smi_flags & SM_DIRTY_WRITE)
200 #define SMFS_SET_INODE_DIRTY_WRITE(inode) (I2SMI(inode)->smi_flags |= SM_DIRTY_WRITE)
201 #define SMFS_CLEAN_INODE_DIRTY_WRITE(inode) (I2SMI(inode)->smi_flags &= ~SM_DIRTY_WRITE)
203 #define SMFS_DO_COW(smfs_info) (smfs_info->smsi_flags & SM_DO_COW)
204 #define SMFS_SET_COW(smfs_info) (smfs_info->smsi_flags |= SM_DO_COW)
205 #define SMFS_CLEAN_COW(smfs_info) (smfs_info->smsi_flags &= ~SM_DO_COW)
207 #define SMFS_SET_INODE_COW(inode) (I2SMI(inode)->smi_flags |= SM_DO_COW)
208 #define SMFS_DO_INODE_COW(inode) (I2SMI(inode)->smi_flags & SM_DO_COW)
209 #define SMFS_CLEAN_INODE_COW(inode) (I2SMI(inode)->smi_flags &= ~SM_DO_COW)
211 #define SMFS_SET_INODE_COWED(inode) (I2SMI(inode)->smi_flags |= SM_DO_COWED)
212 #define SMFS_DO_INODE_COWED(inode) (I2SMI(inode)->smi_flags & SM_DO_COWED)
213 #define SMFS_CLEAN_INODE_COWED(inode) (I2SMI(inode)->smi_flags &= ~SM_DO_COWED)
216 #define LVFS_SMFS_BACK_ATTR "lvfs_back_attr"
219 #define REC_COUNT_BIT 0
220 #define REC_COUNT_MASK 0x01 /*0001*/
222 #define REC_OP_MASK 0x06 /*0110*/
223 #define REC_WRITE_KML_BIT 3
224 #define REC_WRITE_KML_MASK 0x08 /*1000*/
225 #define REC_DEC_LINK_BIT 4
226 #define REC_DEC_LINK_MASK 0x10 /*10000* different with unlink*/
227 #define REC_GET_OID_BIT 5
228 #define REC_GET_OID_MASK 0x20 /*100000*/
230 #define REC_PACK_TYPE_BIT 6
231 #define REC_PACK_TYPE_MASK 0x1C0 /*111000000*/
233 #define SET_REC_COUNT_FLAGS(flag, count_flag) \
234 (flag |= count_flag << REC_COUNT_BIT)
235 #define GET_REC_COUNT_FLAGS(flag) \
236 ((flag & REC_COUNT_MASK) >> REC_COUNT_BIT)
238 #define SET_REC_OP_FLAGS(flag, op_flag) \
239 (flag |= op_flag << REC_OP_BIT)
240 #define GET_REC_OP_FLAGS(flag) \
241 ((flag & REC_OP_MASK) >> REC_OP_BIT)
243 #define SET_REC_WRITE_KML_FLAGS(flag, op_flag) \
244 (flag |= op_flag << REC_OP_BIT)
245 #define GET_REC_WRITE_KML_FLAGS(flag) \
246 ((flag & REC_WRITE_KML_MASK) >> REC_WRITE_KML_BIT)
248 #define SET_REC_DEC_LINK_FLAGS(flag, op_flag) \
249 (flag |= op_flag << REC_DEC_LINK_BIT)
250 #define GET_REC_DEC_LINK_FLAGS(flag) \
251 ((flag & REC_DEC_LINK_MASK) >> REC_DEC_LINK_BIT)
253 #define SET_REC_GET_ID_FLAGS(flag, op_flag) \
254 (flag |= op_flag << REC_GET_OID_BIT)
255 #define GET_REC_GET_OID_FLAGS(flag) \
256 ((flag & REC_GET_OID_MASK) >> REC_GET_OID_BIT)
258 #define SET_REC_PACK_TYPE_INDEX(flag, op_flag) \
259 (flag |= op_flag << REC_PACK_TYPE_BIT)
260 #define GET_REC_PACK_TYPE_INDEX(flag) \
261 ((flag & REC_PACK_TYPE_MASK) >> REC_PACK_TYPE_BIT)
263 #define SMFS_REC_ALL 0x1
264 #define SMFS_REC_BY_COUNT 0x0
266 #define SMFS_REINT_REC 0x1
267 #define SMFS_UNDO_REC 0x2
269 #define SMFS_WRITE_KML 0x1
270 #define SMFS_DEC_LINK 0x1
271 #define SMFS_GET_OID 0x1
273 #define SMFS_DO_REINT_REC(flag) \
274 (GET_REC_OP_FLAGS(flag) == SMFS_REINT_REC)
275 #define SMFS_DO_UNDO_REC(flag) \
276 (GET_REC_OP_FLAGS(flag) == SMFS_UNDO_REC)
277 #define SMFS_DO_REC_ALL(flag) \
278 (GET_REC_COUNT_FLAGS(flag) == SMFS_REC_ALL)
279 #define SMFS_DO_REC_BY_COUNT(flag) \
280 (GET_REC_COUNT_FLAGS(flag) == SMFS_REC_BY_COUNT)
281 #define SMFS_DO_WRITE_KML(flag) \
282 (GET_REC_WRITE_KML_FLAGS(flag) == SMFS_WRITE_KML)
283 #define SMFS_DO_DEC_LINK(flag) \
284 (GET_REC_DEC_LINK_FLAGS(flag) == SMFS_DEC_LINK)
286 #define SMFS_DO_GET_OID(flag) \
287 (GET_REC_GET_OID_FLAGS(flag) == SMFS_GET_OID)
289 /*DIRTY flags of write ops*/
290 #define REINT_EXTENTS_FLAGS "replay_flags"
291 #define SMFS_DIRTY_WRITE 0x01
292 #define SMFS_OVER_WRITE 0x02
295 static inline void duplicate_inode(struct inode *dst_inode,
296 struct inode *src_inode)
298 dst_inode->i_mode = src_inode->i_mode;
299 dst_inode->i_uid = src_inode->i_uid;
300 dst_inode->i_gid = src_inode->i_gid;
301 dst_inode->i_nlink = src_inode->i_nlink;
302 dst_inode->i_size = src_inode->i_size;
303 dst_inode->i_atime = src_inode->i_atime;
304 dst_inode->i_ctime = src_inode->i_ctime;
305 dst_inode->i_mtime = src_inode->i_mtime;
306 dst_inode->i_blksize = src_inode->i_blksize;
307 dst_inode->i_version = src_inode->i_version;
308 //dst_inode->i_state = src_inode->i_state;
309 dst_inode->i_generation = src_inode->i_generation;
310 dst_inode->i_flags = src_inode->i_flags;
312 /* This is to make creating special files working. */
313 dst_inode->i_rdev = src_inode->i_rdev;
316 static inline void post_smfs_inode(struct inode *inode,
317 struct inode *cache_inode)
319 if (inode && cache_inode) {
320 duplicate_inode(inode, cache_inode);
323 * here we must release the cache_inode, otherwise we will have
324 * no chance to do it later.
326 //cache_inode->i_state &=~I_LOCK;
327 inode->i_blocks = cache_inode->i_blocks;
331 static inline void pre_smfs_inode(struct inode *inode,
332 struct inode *cache_inode)
334 if (inode && cache_inode) {
335 cache_inode->i_flags = inode->i_flags;
336 //cache_inode->i_state = inode->i_state;
337 if (S_ISDIR(inode->i_mode)) {
338 cache_inode->i_nlink = inode->i_nlink;
340 cache_inode->i_generation = inode->i_generation;
344 /* instantiate a file handle to the cache file */
345 static inline void duplicate_file(struct file *dst_file, struct file *src_file)
347 if (dst_file && src_file) {
348 dst_file->f_pos = src_file->f_pos;
349 dst_file->f_mode = src_file->f_mode;
350 dst_file->f_flags = src_file->f_flags;
351 dst_file->f_owner = src_file->f_owner;
352 dst_file->f_vfsmnt = src_file->f_vfsmnt;
354 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
355 dst_file->f_reada = src_file->f_reada;
356 dst_file->f_ramax = src_file->f_ramax;
357 dst_file->f_raend = src_file->f_raend;
358 dst_file->f_ralen = src_file->f_ralen;
359 dst_file->f_rawin = src_file->f_rawin;
361 dst_file->f_ra = src_file->f_ra;
366 static inline void duplicate_sb(struct super_block *dst_sb,
367 struct super_block *src_sb)
369 dst_sb->s_blocksize = src_sb->s_blocksize;
370 dst_sb->s_magic = src_sb->s_magic;
371 dst_sb->s_blocksize_bits = src_sb->s_blocksize_bits;
372 dst_sb->s_maxbytes = src_sb->s_maxbytes;
373 dst_sb->s_flags = src_sb->s_flags;
376 static inline int smfs_get_dentry_name_index(struct dentry *dentry,
380 char *name = (char *)dentry->d_name.name;
384 int len = 0, name_len = 0;
386 name_len = dentry->d_name.len;
389 hash = init_name_hash();
391 c = *(const unsigned char *)name++;
392 if (c == ':' || c == '\0')
394 hash = partial_name_hash(c, hash);
397 str->hash = end_name_hash(hash);
398 OBD_ALLOC(str_name, len + 1);
399 memcpy(str_name, dentry->d_name.name, len);
400 qstr_assign(str, str_name, len);
401 if (index && c == ':')
402 *index = simple_strtoul(name, 0, 0);
406 static inline void smfs_free_dentry_name(struct qstr *str)
408 char *name = (char*)str->name;
409 OBD_FREE(name, str->len + 1);
412 static int smfs_d_delete(struct dentry * dentry)
417 static struct dentry_operations sm_dop = {
418 .d_delete = smfs_d_delete,
422 static inline void smfs_update_dentry(struct dentry *dentry,
423 struct dentry *cache_dentry)
425 if (DCACHE_CROSS_REF & cache_dentry->d_flags) {
426 dentry->d_flags |= DCACHE_CROSS_REF;
427 dentry->d_generation = cache_dentry->d_generation;
428 dentry->d_mdsnum = cache_dentry->d_mdsnum;
429 dentry->d_fid = cache_dentry->d_fid;
430 dentry->d_inum = cache_dentry->d_inum;
434 static inline struct dentry *pre_smfs_dentry(struct dentry *parent_dentry,
435 struct inode *cache_inode,
436 struct dentry *dentry)
438 struct dentry *cache_dentry = NULL;
440 cache_dentry = d_alloc(parent_dentry, &dentry->d_name);
445 cache_dentry->d_fsdata = dentry->d_fsdata;
448 smfs_update_dentry(cache_dentry, dentry);
451 cache_dentry->d_parent = cache_dentry;
454 atomic_inc(&cache_inode->i_count); //d_instantiate suppose that
455 d_add(cache_dentry, cache_inode);
457 //defines d_delete op to force killing dentry
458 cache_dentry->d_op = &sm_dop;
460 RETURN(cache_dentry);
463 static inline void post_smfs_dentry(struct dentry *cache_dentry)
470 static inline int smfs_do_cow(struct inode *inode)
472 struct super_block *sb = inode->i_sb;
473 struct smfs_super_info *smfs_info = S2SMI(sb);
475 if (SMFS_DO_COW(smfs_info) && SMFS_DO_INODE_COW(inode))
481 extern int smfs_write_extents(struct inode *dir, struct dentry *dentry,
482 unsigned long from, unsigned long num);
483 extern int smfs_rec_precreate(struct dentry *dentry, int *num, struct obdo *oa);
484 extern int smfs_rec_unpack(struct smfs_proc_args *args, char *record,
485 char **pbuf, int *opcode);
486 #endif /* _LUSTRE_SMFS_H */