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1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2  * vim:expandtab:shiftwidth=8:tabstop=8:
3  *
4  *  lustre/smfs/smfs_internal.h
5  *  Lustre filesystem abstraction routines
6  *
7  *  Copyright (C) 2004 Cluster File Systems, Inc.
8  *
9  *   This file is part of Lustre, http://www.lustre.org.
10  *
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.
14  *
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.
19  *
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.
23  */
24 #ifndef __LINUX_SMFS_H
25 #define __LINUX_SMFS_H
26
27 //#include <linux/lustre_fsfilt.h>
28 #define SMFSDEV_NAME "/dev/smfsconf"
29 #define SMFS_PSDEV_MINOR 250
30 #define SMFS_PSDEV_MAJOR 10
31
32 struct option {
33         char *opt;
34         char *value;
35         struct list_head list;
36 };
37
38 struct smfs_control_device {
39         struct list_head smfs_dev_list;
40 };
41
42 #define SMFS_TYPE                "smfs"
43 #define IOC_SMFS_START           _IOWR('s', 41, long)
44 #define IOC_SMFS_STOP            _IOWR('s', 42, long)
45 #define IOC_SMFS_REINT           _IOWR('s', 43, long)
46 #define IOC_SMFS_UNDO            _IOWR('s', 44, long)
47
48 #ifdef __KERNEL__
49
50 #define SB_OPS_CHECK             0x1
51 #define INODE_OPS_CHECK          0x2
52 #define FILE_OPS_CHECK           0x4
53 #define DENTRY_OPS_CHECK         0x8
54 #define DEV_OPS_CHECK            0x10
55 #define SYMLINK_OPS_CHECK        0x20
56 #define DIR_OPS_CHECK            0x40
57
58 #define KML_LOG_NAME "kml_rec"
59
60 #define MYPATHLEN(buffer, path) ((buffer) + PAGE_SIZE - (path))
61
62 #define SMFS_KML_POST(dir, dentry, data1, data2, op, name, rc, label)   \
63 do {                                                                    \
64         if (smfs_do_rec(dir) && !rc) {                                  \
65                 CDEBUG(D_INODE, "Do %s kml post for dir %lu \n",        \
66                               name, dir->i_ino);                        \
67                 rc = smfs_post_kml_rec(dir, dentry, data1, data2, op);  \
68                 if (rc)                                                 \
69                         GOTO(label, rc);                                \
70         }                                                               \
71 } while(0)
72
73 #define PACK_KML_REC_INIT(buffer, op_code)          \
74 do{                                                 \
75         int opcode = op_code;                       \
76         memcpy(buffer, &opcode, sizeof(opcode));    \
77         buffer += sizeof(opcode);                   \
78 } while (0)
79
80 extern int init_smfs_proc_sys(void);
81 /*options.c*/
82 extern int get_opt(struct option **option, char **pos);
83 extern void cleanup_option(void);
84 extern int init_option(char *data);
85 /*cache.c*/
86 extern void sm_set_inode_ops(struct inode *cache_inode, struct inode *inode);
87 extern void sm_set_sb_ops(struct super_block *cache_sb, struct super_block *sb);
88 extern void init_smfs_cache(void);
89 extern void cleanup_smfs_cache(void);
90 extern void sm_set_journal_ops(struct super_block *sb, char *cache_type);
91 extern int smfs_init_sm_ops(struct smfs_super_info *smb);
92 extern void smfs_cleanup_sm_ops(struct smfs_super_info *smb);
93 static inline struct super_operations *cache_sops(struct smfs_super_info *smb)
94 {
95         return &smb->sm_ops->sm_sb_ops;
96 }
97 static inline struct inode_operations *cache_diops(struct smfs_super_info *smb)
98 {
99         return &smb->sm_ops->sm_dir_iops;
100 }
101 static inline struct inode_operations *cache_fiops(struct smfs_super_info *smb)
102 {
103         return &smb->sm_ops->sm_file_iops;
104 }
105 static inline struct inode_operations *cache_siops(struct smfs_super_info *smb)
106 {
107         return &smb->sm_ops->sm_sym_iops;
108 }
109 static inline struct file_operations *cache_dfops(struct smfs_super_info *smb)
110 {
111         return &smb->sm_ops->sm_dir_fops;
112 }
113 static inline struct file_operations *cache_ffops(struct smfs_super_info *smb)
114 {
115         return &smb->sm_ops->sm_file_fops;
116 }
117 static inline struct file_operations *cache_sfops(struct smfs_super_info *smb)
118 {
119         return &smb->sm_ops->sm_sym_fops;
120 }
121 static inline struct dentry_operations *cache_dops(struct smfs_super_info *smb)
122 {
123         return &smb->sm_ops->sm_dentry_ops;
124 }
125 static inline struct journal_operations *journal_ops(struct smfs_super_info *smb)
126 {
127         return &smb->sm_ops->sm_journal_ops;
128 }
129 /*super.c*/
130 extern int init_smfs(void);
131 extern int cleanup_smfs(void);
132 extern void smfs_put_super(struct super_block *sb);
133 extern struct super_block *smfs_get_sb_by_path(char *path, int len);
134 extern struct vfsmount* get_vfsmount(struct super_block *sb);
135 /*sysctl.c*/
136 extern int sm_debug_level;
137 extern int sm_inodes;
138 extern long sm_kmemory;
139 extern int sm_stack;
140 /*dir.c*/
141 extern struct inode_operations smfs_dir_iops;
142 extern struct file_operations smfs_dir_fops;
143 /*file.c*/
144 extern struct inode_operations smfs_file_iops;
145 extern struct file_operations  smfs_file_fops;
146 extern int smfs_ioctl(struct inode * inode, struct file * filp,
147                       unsigned int cmd, unsigned long arg);
148 extern int smfs_fsync(struct file * file, struct dentry *dentry, int datasync);
149 extern int smfs_setattr(struct dentry *dentry, struct iattr *attr);
150 extern int smfs_setxattr(struct dentry *dentry, const char *name,
151                          const void *value, size_t size, int flags);
152 extern int smfs_getxattr(struct dentry *dentry, const char *name, void *buffer,
153                          size_t size);
154 extern ssize_t smfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
155 extern int smfs_removexattr(struct dentry *dentry, const char *name);
156 extern int smfs_open(struct inode * inode, struct file * filp);
157 extern int smfs_release(struct inode * inode, struct file * filp);
158 /*inode.c*/
159 extern struct super_operations smfs_super_ops;
160 /*symlink.c*/
161 extern struct inode_operations smfs_sym_iops;
162 extern struct file_operations smfs_sym_fops;
163 /*journal.c */
164 extern void *smfs_trans_start(struct inode *inode, int op, void *desc_private);
165 extern void smfs_trans_commit(struct inode *inode, void *handle,
166                               int force_sync);
167 extern int  smfs_post_kml_rec(struct inode *dir, struct dentry *dst_dentry,
168                               void   *data1, void *data2, int op);
169
170 extern int smfs_post_rec_write(struct inode *dir, struct dentry *dentry,
171                                void   *data1, void *data2);
172 extern int smfs_post_rec_setattr(struct inode *dir, struct dentry *dentry,
173                                  void   *data1, void *data2);
174 /*kml.c*/
175 extern int smfs_kml_init(struct super_block *sb);
176 extern int smfs_do_rec(struct inode *inode);
177 extern int smfs_rec_cleanup(struct super_block *sb);
178 extern int smfs_rec_init(struct super_block *sb);
179 extern int smfs_rec_unpack(struct smfs_proc_args *args, char *record,
180                            char **pbuf, int *opcode);
181 extern int smfs_process_rec(struct super_block *sb, int count,
182                             char *dir, int flags);
183 extern void smfs_rec_pack(struct update_record *rec,
184                           struct inode *dst, void* data, int op);
185
186 extern smfs_pack_rec_func smfs_get_rec_pack_type(struct super_block *sb);
187
188 extern int ost_rec_pack_init(struct super_block *sb);
189 /*ost_kml.c*/
190 extern int mds_rec_pack_init(struct super_block *sb);
191
192 /*smfs_llog.c*/
193 extern int smfs_llog_setup(struct super_block *sb, struct vfsmount *mnt);
194 extern int smfs_llog_cleanup(struct super_block *sb);
195 extern int smfs_llog_add_rec(struct smfs_super_info * sinfo, void *data,
196                              int data_size);
197 /*ioctl.c*/
198 extern int init_smfs_psdev(void);
199 extern void smfs_cleanup_psdev(void);
200
201 /* cache_space.c */
202 extern int do_cache_manage;
203 struct cache_purge_queue {
204         wait_queue_head_t       cpq_waitq;
205         struct super_block     *cpq_sb;
206         struct llog_handle     *cpq_loghandle;
207         __u32                   cpq_flags;
208         struct completion       cpq_comp;
209 };
210 /* opcodes */
211 #define CACHE_SPACE_INSERT 0x1
212 #define CACHE_SPACE_DELETE 0x2
213 #define CACHE_SPACE_COMMIT 0x4
214
215 #define CACHE_LRU_LOG "CACHE_LRU_LIST"
216
217 extern int smfs_cache_hook(struct inode *inode);
218 extern void cache_space_pre(struct inode *inode, int op);
219 extern int cache_space_post(int op, void *handle, struct inode *old_dir,
220                             struct dentry *old_dentry, struct inode *new_dir,
221                             struct dentry *new_dentry);
222
223 extern int cache_space_hook_setup(struct super_block *);
224 extern int cache_space_hook_cleanup(void);
225 extern int cache_space_hook_init(struct super_block *);
226 extern int cache_space_hook_exit(struct super_block *);
227
228 #define XATTR_SMFS_HOARD_MARK           "hoard"
229 #define XATTR_SMFS_CACHE_LOGCOOKIE      "cache"
230 #define XATTR_SMFS_ACTIVE_ENTRY         "entry"
231
232
233 static inline int set_hoard_priority(struct inode *inode, void *handle,
234                                      __u32 *hoard)
235 {
236         struct fsfilt_operations *fsops = I2CSB(inode)->sm_fsfilt;
237         int rc;
238
239         rc = fsops->fs_set_xattr(inode, handle, XATTR_SMFS_HOARD_MARK,
240                                  hoard, sizeof(__u32));
241         RETURN(rc);
242 }
243
244 static inline int get_hoard_priority(struct inode *inode, __u32 *hoard)
245 {
246         struct fsfilt_operations *fsops = I2CSB(inode)->sm_fsfilt;
247         int rc;
248
249         rc = fsops->fs_get_xattr(inode, XATTR_SMFS_HOARD_MARK,
250                                  hoard, sizeof(__u32));
251         RETURN(rc);
252 }
253
254 static inline int set_active_entry(struct inode *dir, __u64 *active_entry,
255                                    void *handle)
256 {
257         struct fsfilt_operations *fsops = I2CSB(dir)->sm_fsfilt;
258         int rc;
259         *active_entry = cpu_to_le64(*active_entry);
260         rc = fsops->fs_set_xattr(dir, handle, XATTR_SMFS_ACTIVE_ENTRY,
261                                  active_entry, sizeof(__u64));
262         RETURN(rc);
263 }
264 static inline int get_active_entry(struct inode *dir, __u64 *active_entry)
265 {
266         struct fsfilt_operations *fsops = I2CSB(dir)->sm_fsfilt;
267         int rc = fsops->fs_get_xattr(dir, XATTR_SMFS_ACTIVE_ENTRY,
268                                      active_entry, sizeof(__u64));
269         *active_entry = le64_to_cpu(*active_entry);
270         if (rc >= 0)
271                 rc = 0;
272         RETURN(rc);
273 }
274
275 #define CACHE_HOOK_CREATE       1
276 #define CACHE_HOOK_LOOKUP       2
277 #define CACHE_HOOK_LINK         3
278 #define CACHE_HOOK_UNLINK       4
279 #define CACHE_HOOK_SYMLINK      5
280 #define CACHE_HOOK_MKDIR        6
281 #define CACHE_HOOK_RMDIR        7
282 #define CACHE_HOOK_MKNOD        8
283 #define CACHE_HOOK_RENAME       9
284
285 #define CACHE_HOOK_MAX          9
286
287 #define SMFS_CACHE_HOOK_PRE(op, handle, dir)                            \
288 {                                                                       \
289         if (smfs_cache_hook(dir)) {                                     \
290                 LASSERT(handle != NULL);                                \
291                 CDEBUG(D_INODE, "cache hook pre: op %d, dir %lu\n",     \
292                        op, dir->i_ino);                                 \
293                 cache_space_pre(dir, op);                               \
294         }                                                               \
295 }
296
297 #define SMFS_CACHE_HOOK_POST(op, handle, old_dir, old_dentry,           \
298                              new_dir, new_dentry, rc, label)            \
299 {                                                                       \
300         if (!rc && smfs_cache_hook(old_dir)) {                          \
301                 LASSERT(handle != NULL);                                \
302                 CDEBUG(D_INODE, "cache hook post: op %d, dir %lu\n",    \
303                        op, old_dir->i_ino);                             \
304                 rc = cache_space_post(op, handle, old_dir, old_dentry,  \
305                                          new_dir, new_dentry);          \
306                 if (rc)                                                 \
307                         GOTO(label, rc);                                \
308         }                                                               \
309 }
310
311 #endif /*__KERNEL*/
312 #endif /* __LINUX_SMFS_H */