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,
77 struct mds_kml_pack_info {
83 struct smfs_super_info {
84 struct super_block *smsi_sb;
85 struct vfsmount *smsi_mnt; /* mount the cache kern */
86 struct fsfilt_operations *sm_cache_fsfilt; /* fsfilt operations */
87 struct fsfilt_operations *sm_fsfilt; /* fsfilt operations */
88 struct sm_operations *sm_ops; /* cache ops */
89 struct lvfs_run_ctxt *smsi_ctxt;
90 struct llog_ctxt *smsi_kml_log; /* smfs kml llog */
91 struct dentry *smsi_logs_dir;
92 struct dentry *smsi_objects_dir;
93 char *smsi_cache_ftype; /* cache file system type */
94 char *smsi_ftype; /* file system type */
95 struct obd_export *smsi_exp; /* file system obd exp */
96 struct snap_super_info *smsi_snap_info; /* snap table cow */
98 struct rw_semaphore plg_sem; /* rw semaphore to protect
100 __u32 plg_flags; /* flags */
102 __u32 smsi_ops_check;
103 struct list_head smsi_plg_list;
107 #define SMFS_FILE_TYPE "smfs"
108 #define SMFS_FILE_MAGIC 0x19760218
110 struct smfs_file_info {
115 struct smfs_proc_args {
116 struct super_block *sr_sb;
122 __u32 e_block; /* first logical block extent covers */
123 __u32 e_start; /* first physical block extents lives */
124 __u32 e_num; /* number of blocks covered by extent */
127 #define I2SMI(inode) ((struct smfs_inode_info *) ((inode->u.generic_ip)))
128 //#define I2FSI(inode) (((inode->u.generic_ip)))
130 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
131 #define S2FSI(sb) (((sb->u.generic_sbp)))
132 #define S2SMI(sb) ((struct smfs_super_info *) ((sb->u.generic_sbp)))
133 #define S2CSB(sb) (((struct smfs_super_info *)((sb->u.generic_sbp)))->smsi_sb)
135 #define S2FSI(sb) ((sb->s_fs_info))
136 #define S2SMI(sb) ((struct smfs_super_info *) (sb->s_fs_info))
137 #define S2CSB(sb) (((struct smfs_super_info *) (sb->s_fs_info))->smsi_sb)
140 #define I2CI(inode) (((struct smfs_inode_info*) ((inode->u.generic_ip)))->smi_inode)
142 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
143 #define I2CSB(inode) ((struct smfs_super_info *) ((inode->i_sb->u.generic_sbp)))
145 #define I2CSB(inode) ((struct smfs_super_info *) (inode->i_sb->s_fs_info))
148 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
149 #define I2FOPS(inode) (((struct smfs_super_info *) \
150 ((inode->i_sb->u.generic_sbp)))->sm_cache_fsfilt)
152 #define I2FOPS(inode) (((struct smfs_super_info *) \
153 (inode->i_sb->s_fs_info))->sm_cache_fsfilt)
156 #define I2SNAPI(inode) (&(I2SMI(inode)->sm_sninfo))
157 #define I2SNAPCOPS(inode) ((S2SMI(inode->i_sb))->smsi_snap_info->snap_cache_fsfilt)
158 #define I2SNAPOPS(inode) ((S2SMI(inode->i_sb))->smsi_snap_info->snap_fsfilt)
160 #define S2SNAPI(sb) (S2SMI(sb)->smsi_snap_info)
161 #define F2SMFI(file) ((struct smfs_file_info *)((file->private_data)))
162 #define F2CF(file) (((struct smfs_file_info *) ((file->private_data)))->c_file)
163 #define SIZE2BLKS(size, inode) ((size + (I2CI(inode)->i_blksize)) >> (I2CI(inode)->i_blkbits))
164 #define OFF2BLKS(off, inode) (off >> (I2CI(inode)->i_blkbits))
166 /* SMFS external flags and methods */
167 #define SM_ALL_PLG 0x80L
169 #define SM_KML_PLG 0x1L
170 #define SM_DO_REC SM_KML_PLG
172 //#define SM_INIT_REC 0x2
173 //#define SM_CACHE_HOOK 0x4
174 //#define SM_OVER_WRITE 0x8
175 //#define SM_DIRTY_WRITE 0x10
176 #define SM_DO_COW 0x20
177 #define SM_DO_COWED 0x40
178 #define SM_HND_IBLOCKS 0x80
181 #define SMFS_DO_REC(smfs_info) (smfs_info->smsi_flags & SM_DO_REC)
182 #define SMFS_SET_REC(smfs_info) (smfs_info->smsi_flags |= SM_DO_REC)
183 #define SMFS_CLEAN_REC(smfs_info) (smfs_info->smsi_flags &= ~SM_DO_REC)
185 #define SMFS_INIT_REC(smfs_info) (smfs_info->smsi_flags & SM_INIT_REC)
186 #define SMFS_SET_INIT_REC(smfs_info) (smfs_info->smsi_flags |= SM_INIT_REC)
187 #define SMFS_CLEAN_INIT_REC(smfs_info) (smfs_info->smsi_flags &= ~SM_INIT_REC)
189 #define SMFS_SET_INODE_REC(inode) (I2SMI(inode)->smi_flags |= SM_DO_REC)
190 #define SMFS_DO_INODE_REC(inode) (I2SMI(inode)->smi_flags & SM_DO_REC)
191 #define SMFS_CLEAN_INODE_REC(inode) (I2SMI(inode)->smi_flags &= ~SM_DO_REC)
193 #define SMFS_CACHE_HOOK(smfs_info) (smfs_info->smsi_flags & SM_CACHE_HOOK)
194 #define SMFS_SET_CACHE_HOOK(smfs_info) (smfs_info->smsi_flags |= SM_CACHE_HOOK)
195 #define SMFS_CLEAN_CACHE_HOOK(smfs_info) (smfs_info->smsi_flags &= ~SM_CACHE_HOOK)
197 #define SMFS_INODE_CACHE_HOOK(inode) (I2SMI(inode)->smi_flags & SM_CACHE_HOOK)
198 #define SMFS_SET_INODE_CACHE_HOOK(inode) (I2SMI(inode)->smi_flags |= SM_CACHE_HOOK)
199 #define SMFS_CLEAN_INODE_CACHE_HOOK(inode) (I2SMI(inode)->smi_flags &= ~SM_CACHE_HOOK)
201 #define SMFS_INODE_OVER_WRITE(inode) (I2SMI(inode)->smi_flags & SM_OVER_WRITE)
202 #define SMFS_SET_INODE_OVER_WRITE(inode) (I2SMI(inode)->smi_flags |= SM_OVER_WRITE)
203 #define SMFS_CLEAN_INODE_OVER_WRITE(inode) (I2SMI(inode)->smi_flags &= ~SM_OVER_WRITE)
205 #define SMFS_INODE_DIRTY_WRITE(inode) (I2SMI(inode)->smi_flags & SM_DIRTY_WRITE)
206 #define SMFS_SET_INODE_DIRTY_WRITE(inode) (I2SMI(inode)->smi_flags |= SM_DIRTY_WRITE)
207 #define SMFS_CLEAN_INODE_DIRTY_WRITE(inode) (I2SMI(inode)->smi_flags &= ~SM_DIRTY_WRITE)
209 #define SMFS_DO_COW(smfs_info) (smfs_info->smsi_flags & SM_DO_COW)
210 #define SMFS_SET_COW(smfs_info) (smfs_info->smsi_flags |= SM_DO_COW)
211 #define SMFS_CLEAN_COW(smfs_info) (smfs_info->smsi_flags &= ~SM_DO_COW)
213 #define SMFS_SET_INODE_COW(inode) (I2SMI(inode)->smi_flags |= SM_DO_COW)
214 #define SMFS_DO_INODE_COW(inode) (I2SMI(inode)->smi_flags & SM_DO_COW)
215 #define SMFS_CLEAN_INODE_COW(inode) (I2SMI(inode)->smi_flags &= ~SM_DO_COW)
217 #define SMFS_SET_INODE_COWED(inode) (I2SMI(inode)->smi_flags |= SM_DO_COWED)
218 #define SMFS_DO_INODE_COWED(inode) (I2SMI(inode)->smi_flags & SM_DO_COWED)
219 #define SMFS_CLEAN_INODE_COWED(inode) (I2SMI(inode)->smi_flags &= ~SM_DO_COWED)
221 #define SMFS_DO_HND_IBLOCKS(smfs_info) (smfs_info->smsi_flags & SM_HND_IBLOCKS)
222 #define SMFS_SET_HND_IBLOCKS(smfs_info) (smfs_info->smsi_flags |= SM_HND_IBLOCKS)
223 #define SMFS_CLEAN_HND_IBLOCKS(smfs_info) (smfs_info->smsi_flags &= ~SM_HND_IBLOCKS)
225 //#define LVFS_SMFS_BACK_ATTR "lvfs_back_attr"
228 #define REC_COUNT_BIT 0
229 #define REC_COUNT_MASK 0x01 /*0001*/
231 #define REC_OP_MASK 0x06 /*0110*/
232 #define REC_WRITE_KML_BIT 3
233 #define REC_WRITE_KML_MASK 0x08 /*1000*/
234 #define REC_DEC_LINK_BIT 4
235 #define REC_DEC_LINK_MASK 0x10 /*10000* different with unlink*/
236 #define REC_GET_OID_BIT 5
237 #define REC_GET_OID_MASK 0x20 /*100000*/
239 //#define REC_PACK_TYPE_BIT 6
240 //#define REC_PACK_TYPE_MASK 0x1C0 /*111000000*/
242 #define SET_REC_COUNT_FLAGS(flag, count_flag) \
243 (flag |= count_flag << REC_COUNT_BIT)
244 #define GET_REC_COUNT_FLAGS(flag) \
245 ((flag & REC_COUNT_MASK) >> REC_COUNT_BIT)
247 #define SET_REC_OP_FLAGS(flag, op_flag) \
248 (flag |= op_flag << REC_OP_BIT)
249 #define GET_REC_OP_FLAGS(flag) \
250 ((flag & REC_OP_MASK) >> REC_OP_BIT)
252 #define SET_REC_WRITE_KML_FLAGS(flag, op_flag) \
253 (flag |= op_flag << REC_OP_BIT)
254 #define GET_REC_WRITE_KML_FLAGS(flag) \
255 ((flag & REC_WRITE_KML_MASK) >> REC_WRITE_KML_BIT)
257 #define SET_REC_DEC_LINK_FLAGS(flag, op_flag) \
258 (flag |= op_flag << REC_DEC_LINK_BIT)
259 #define GET_REC_DEC_LINK_FLAGS(flag) \
260 ((flag & REC_DEC_LINK_MASK) >> REC_DEC_LINK_BIT)
262 #define SET_REC_GET_ID_FLAGS(flag, op_flag) \
263 (flag |= op_flag << REC_GET_OID_BIT)
264 #define GET_REC_GET_OID_FLAGS(flag) \
265 ((flag & REC_GET_OID_MASK) >> REC_GET_OID_BIT)
267 #define SET_REC_PACK_TYPE_INDEX(flag, op_flag) \
268 (flag |= op_flag << REC_PACK_TYPE_BIT)
269 #define GET_REC_PACK_TYPE_INDEX(flag) \
270 ((flag & REC_PACK_TYPE_MASK) >> REC_PACK_TYPE_BIT)
272 //#define SMFS_REC_ALL 0x1
273 //#define SMFS_REC_BY_COUNT 0x0
275 //#define SMFS_REINT_REC 0x1
276 //#define SMFS_UNDO_REC 0x2
278 #define SMFS_WRITE_KML 0x1
279 #define SMFS_DEC_LINK 0x1
280 #define SMFS_GET_OID 0x1
282 #define SMFS_DO_REINT_REC(flag) \
283 (GET_REC_OP_FLAGS(flag) == SMFS_REINT_REC)
284 #define SMFS_DO_UNDO_REC(flag) \
285 (GET_REC_OP_FLAGS(flag) == SMFS_UNDO_REC)
286 #define SMFS_DO_REC_ALL(flag) \
287 (GET_REC_COUNT_FLAGS(flag) == SMFS_REC_ALL)
288 #define SMFS_DO_REC_BY_COUNT(flag) \
289 (GET_REC_COUNT_FLAGS(flag) == SMFS_REC_BY_COUNT)
291 #define SMFS_DO_WRITE_KML(flag) \
292 (GET_REC_WRITE_KML_FLAGS(flag) == SMFS_WRITE_KML)
294 #define SMFS_DO_DEC_LINK(flag) \
295 (GET_REC_DEC_LINK_FLAGS(flag) == SMFS_DEC_LINK)
297 #define SMFS_DO_GET_OID(flag) \
298 (GET_REC_GET_OID_FLAGS(flag) == SMFS_GET_OID)
300 /*DIRTY flags of write ops*/
301 #define REINT_EXTENTS_FLAGS "replay_flags"
302 #define SMFS_DIRTY_WRITE 0x01
303 #define SMFS_OVER_WRITE 0x02
305 static inline void duplicate_inode(struct inode *dst_inode,
306 struct inode *src_inode)
308 dst_inode->i_mode = src_inode->i_mode;
309 dst_inode->i_uid = src_inode->i_uid;
310 dst_inode->i_gid = src_inode->i_gid;
311 //dst_inode->i_nlink = src_inode->i_nlink;
312 dst_inode->i_size = src_inode->i_size;
313 dst_inode->i_atime = src_inode->i_atime;
314 dst_inode->i_ctime = src_inode->i_ctime;
315 dst_inode->i_mtime = src_inode->i_mtime;
316 dst_inode->i_blksize = src_inode->i_blksize;
317 dst_inode->i_version = src_inode->i_version;
318 //dst_inode->i_state = src_inode->i_state;
319 dst_inode->i_generation = src_inode->i_generation;
320 dst_inode->i_flags = src_inode->i_flags;
322 /* This is to make creating special files working. */
323 dst_inode->i_rdev = src_inode->i_rdev;
326 static inline void post_smfs_inode(struct inode *inode,
327 struct inode *cache_inode)
329 if (inode && cache_inode) {
330 duplicate_inode(inode, cache_inode);
332 * here we must release the cache_inode, otherwise we will have
333 * no chance to do it later.
335 //cache_inode->i_state &=~I_LOCK;
336 inode->i_blocks = cache_inode->i_blocks;
340 static inline void i_nlink_inc(struct inode * inode)
344 I2CI(inode)->i_nlink++;
347 static inline void i_nlink_dec(struct inode * inode)
351 I2CI(inode)->i_nlink--;
354 static inline void pre_smfs_inode(struct inode *inode,
355 struct inode *cache_inode)
357 if (inode && cache_inode) {
358 cache_inode->i_flags = inode->i_flags;
359 cache_inode->i_generation = inode->i_generation;
363 /* instantiate a file handle to the cache file */
364 static inline void duplicate_file(struct file *dst_file, struct file *src_file)
366 if (dst_file && src_file) {
367 dst_file->f_pos = src_file->f_pos;
368 dst_file->f_mode = src_file->f_mode;
369 dst_file->f_flags = src_file->f_flags;
370 dst_file->f_owner = src_file->f_owner;
371 dst_file->f_vfsmnt = src_file->f_vfsmnt;
373 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
374 dst_file->f_reada = src_file->f_reada;
375 dst_file->f_ramax = src_file->f_ramax;
376 dst_file->f_raend = src_file->f_raend;
377 dst_file->f_ralen = src_file->f_ralen;
378 dst_file->f_rawin = src_file->f_rawin;
380 dst_file->f_ra = src_file->f_ra;
385 static inline void duplicate_sb(struct super_block *dst_sb,
386 struct super_block *src_sb)
388 dst_sb->s_blocksize = src_sb->s_blocksize;
389 dst_sb->s_magic = src_sb->s_magic;
390 dst_sb->s_blocksize_bits = src_sb->s_blocksize_bits;
391 dst_sb->s_maxbytes = src_sb->s_maxbytes;
392 dst_sb->s_flags = src_sb->s_flags;
395 static inline int smfs_get_dentry_name_index(struct dentry *dentry,
399 char *name = (char *)dentry->d_name.name;
403 int len = 0, name_len = 0;
405 name_len = dentry->d_name.len;
408 hash = init_name_hash();
410 c = *(const unsigned char *)name++;
411 if (c == ':' || c == '\0')
413 hash = partial_name_hash(c, hash);
416 str->hash = end_name_hash(hash);
417 OBD_ALLOC(str_name, len + 1);
418 memcpy(str_name, dentry->d_name.name, len);
419 qstr_assign(str, str_name, len);
420 if (index && c == ':')
421 *index = simple_strtoul(name, 0, 0);
425 static inline void smfs_free_dentry_name(struct qstr *str)
427 char *name = (char*)str->name;
428 OBD_FREE(name, str->len + 1);
431 static int smfs_d_delete(struct dentry * dentry)
436 static struct dentry_operations sm_dop = {
437 .d_delete = smfs_d_delete,
441 static inline void smfs_update_dentry(struct dentry *dentry,
442 struct dentry *cache_dentry)
444 if (DCACHE_CROSS_REF & cache_dentry->d_flags) {
445 dentry->d_flags |= DCACHE_CROSS_REF;
446 dentry->d_generation = cache_dentry->d_generation;
447 dentry->d_mdsnum = cache_dentry->d_mdsnum;
448 dentry->d_fid = cache_dentry->d_fid;
449 dentry->d_inum = cache_dentry->d_inum;
453 static inline struct dentry *pre_smfs_dentry(struct dentry *parent_dentry,
454 struct inode *cache_inode,
455 struct dentry *dentry)
457 struct dentry *cache_dentry = NULL;
459 cache_dentry = d_alloc(parent_dentry, &dentry->d_name);
464 cache_dentry->d_fsdata = dentry->d_fsdata;
467 smfs_update_dentry(cache_dentry, dentry);
470 cache_dentry->d_parent = cache_dentry;
472 //defines d_delete op to force killing dentry
473 cache_dentry->d_op = &sm_dop;
476 atomic_inc(&cache_inode->i_count); //d_instantiate suppose that
477 d_add(cache_dentry, cache_inode);
480 RETURN(cache_dentry);
483 static inline void post_smfs_dentry(struct dentry *cache_dentry)
490 static inline int smfs_do_cow(struct inode *inode)
492 struct super_block *sb = inode->i_sb;
493 struct smfs_super_info *smfs_info = S2SMI(sb);
495 if (SMFS_DO_COW(smfs_info) && SMFS_DO_INODE_COW(inode))
500 extern int smfs_write_extents(struct inode *dir, struct dentry *dentry,
501 unsigned long from, unsigned long num);
502 extern int smfs_rec_precreate(struct dentry *dentry, int *num, struct obdo *oa);
503 extern int smfs_rec_unpack(struct smfs_proc_args *args, char *record,
504 char **pbuf, int *opcode);
505 #endif /* _LUSTRE_SMFS_H */