1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (C) 2001-2004 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 * Filesystem interface helper.
25 #ifndef _LUSTRE_FSFILT_H
26 #define _LUSTRE_FSFILT_H
30 #include <linux/obd.h>
31 #include <linux/lustre_log.h>
32 #include <linux/obd_class.h>
34 typedef void (*fsfilt_cb_t)(struct obd_device *obd, __u64 last_rcvd,
35 void *data, int error);
37 struct fsfilt_objinfo {
38 struct dentry *fso_dentry;
42 struct fsfilt_operations {
43 struct list_head fs_list;
44 struct module *fs_owner;
46 void *(* fs_start)(struct inode *inode, int op, void *desc_private,
48 void *(* fs_brw_start)(int objcount, struct fsfilt_objinfo *fso,
49 int niocount, struct niobuf_local *nb,
50 void *desc_private, int logs);
51 int (* fs_commit)(struct inode *inode, void *handle,int force_sync);
52 int (* fs_commit_async)(struct inode *inode, void *handle,
54 int (* fs_commit_wait)(struct inode *inode, void *handle);
55 int (* fs_setattr)(struct dentry *dentry, void *handle,
56 struct iattr *iattr, int do_trunc);
57 int (* fs_iocontrol)(struct inode *inode, struct file *file,
58 unsigned int cmd, unsigned long arg);
59 int (* fs_set_md)(struct inode *inode, void *handle, void *md,
61 int (* fs_get_md)(struct inode *inode, void *md, int size);
63 /* this method is needed to make IO operation fsfilt nature depend. */
64 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
65 int (* fs_send_bio)(struct inode *inode, struct bio *bio);
67 int (* fs_send_bio)(struct inode *inode, struct kiobuf *bio);
70 /* methods for getting page from backing fs and putting page there
71 * during IO. Used on OST. */
72 int (* fs_putpage)(struct inode *inode, struct page *page);
73 struct page *(* fs_getpage)(struct inode *inode, long int index);
75 ssize_t (* fs_readpage)(struct file *file, char *buf, size_t count,
77 int (* fs_add_journal_cb)(struct obd_device *obd, struct super_block *sb,
78 __u64 last_rcvd, void *handle, fsfilt_cb_t cb_func,
80 int (* fs_statfs)(struct super_block *sb, struct obd_statfs *osfs);
81 int (* fs_sync)(struct super_block *sb);
82 int (* fs_map_inode_page)(struct inode *inode, struct page *page,
83 unsigned long *blocks, int *created,
85 int (* fs_prep_san_write)(struct inode *inode, long *blocks,
86 int nblocks, loff_t newsize);
87 int (* fs_write_record)(struct file *, void *, int size, loff_t *,
89 int (* fs_read_record)(struct file *, void *, int size, loff_t *);
90 int (* fs_setup)(struct super_block *sb);
92 int (* fs_set_xattr)(struct inode *inode, void *handle, char *name,
93 void *buffer, int buffer_size);
94 int (* fs_get_xattr)(struct inode *inode, char *name,
95 void *buffer, int buffer_size);
97 int (* fs_get_op_len)(int, struct fsfilt_objinfo *, int);
100 extern int fsfilt_register_ops(struct fsfilt_operations *fs_ops);
101 extern void fsfilt_unregister_ops(struct fsfilt_operations *fs_ops);
102 extern struct fsfilt_operations *fsfilt_get_ops(const char *type);
103 extern void fsfilt_put_ops(struct fsfilt_operations *fs_ops);
105 #define FSFILT_OP_UNLINK 1
106 #define FSFILT_OP_RMDIR 2
107 #define FSFILT_OP_RENAME 3
108 #define FSFILT_OP_CREATE 4
109 #define FSFILT_OP_MKDIR 5
110 #define FSFILT_OP_SYMLINK 6
111 #define FSFILT_OP_MKNOD 7
112 #define FSFILT_OP_SETATTR 8
113 #define FSFILT_OP_LINK 9
114 #define FSFILT_OP_CANCEL_UNLINK 10
115 #define FSFILT_OP_NOOP 15
117 /* XXX BUG 3188 -- must return to one set of opcodes */
118 #define KML_UNLINK 0x11
119 #define KML_RMDIR 0x12
120 #define KML_RENAME 0x13
121 #define KML_CREATE 0x14
122 #define KML_MKDIR 0x15
123 #define KML_SYMLINK 0x16
124 #define KML_MKNOD 0x17
125 #define KML_LINK 0x19
127 #define CACHE_UNLINK 0x21
128 #define CACHE_RMDIR 0x22
129 #define CACHE_RENAME 0x23
130 #define CACHE_CREATE 0x24
131 #define CACHE_MKDIR 0x25
132 #define CACHE_SYMLINK 0x26
133 #define CACHE_MKNOD 0x27
134 #define CACHE_LINK 0x29
135 #define CACHE_NOOP 0x2f
137 #define KML_CACHE_UNLINK 0x31
138 #define KML_CACHE_RMDIR 0x32
139 #define KML_CACHE_RENAME 0x33
140 #define KML_CACHE_CREATE 0x34
141 #define KML_CACHE_MKDIR 0x35
142 #define KML_CACHE_SYMLINK 0x36
143 #define KML_CACHE_MKNOD 0x37
144 #define KML_CACHE_LINK 0x39
145 #define KML_CACHE_NOOP 0x3f
148 fsfilt_start_ops(struct fsfilt_operations *ops, struct inode *inode,
149 int op, struct obd_trans_info *oti, int logs)
151 unsigned long now = jiffies;
152 void *parent_handle = oti ? oti->oti_handle : NULL;
153 void *handle = ops->fs_start(inode, op, parent_handle, logs);
154 CDEBUG(D_HA, "started handle %p (%p)\n", handle, parent_handle);
157 if (parent_handle == NULL) {
158 oti->oti_handle = handle;
159 } else if (handle != parent_handle) {
160 CERROR("mismatch: parent %p, handle %p, oti %p\n",
161 parent_handle, handle, oti);
165 if (time_after(jiffies, now + 15 * HZ))
166 CERROR("long journal start time %lus\n", (jiffies - now) / HZ);
171 fsfilt_start_log(struct obd_device *obd, struct inode *inode,
172 int op, struct obd_trans_info *oti, int logs)
174 return fsfilt_start_ops(obd->obd_fsops, inode, op, oti, logs);
178 fsfilt_start(struct obd_device *obd, struct inode *inode,
179 int op, struct obd_trans_info *oti)
181 return fsfilt_start_ops(obd->obd_fsops, inode, op, oti, 0);
185 llog_fsfilt_start(struct llog_ctxt *ctxt, struct inode *inode,
186 int op, struct obd_trans_info *oti)
188 return fsfilt_start_ops(ctxt->loc_fsops, inode, op, oti, 1);
192 fsfilt_commit_ops(struct fsfilt_operations *ops, struct inode *inode,
193 void *handle, int force_sync)
195 unsigned long now = jiffies;
196 int rc = ops->fs_commit(inode, handle, force_sync);
197 CDEBUG(D_HA, "committing handle %p\n", handle);
199 if (time_after(jiffies, now + 15 * HZ))
200 CERROR("long journal start time %lus\n", (jiffies - now) / HZ);
206 fsfilt_commit(struct obd_device *obd, struct inode *inode,
207 void *handle, int force_sync)
209 return fsfilt_commit_ops(obd->obd_fsops, inode, handle, force_sync);
213 llog_fsfilt_commit(struct llog_ctxt *ctxt, struct inode *inode,
214 void *handle, int force_sync)
216 return fsfilt_commit_ops(ctxt->loc_fsops, inode, handle, force_sync);
220 fsfilt_brw_start_log(struct obd_device *obd, int objcount,
221 struct fsfilt_objinfo *fso, int niocount,
222 struct niobuf_local *nb, struct obd_trans_info *oti,
225 unsigned long now = jiffies;
226 void *parent_handle = oti ? oti->oti_handle : NULL;
227 void *handle = obd->obd_fsops->fs_brw_start(objcount, fso, niocount, nb,
228 parent_handle, logs);
229 CDEBUG(D_HA, "started handle %p (%p)\n", handle, parent_handle);
232 if (parent_handle == NULL) {
233 oti->oti_handle = handle;
234 } else if (handle != parent_handle) {
235 CERROR("mismatch: parent %p, handle %p, oti %p\n",
236 parent_handle, handle, oti);
240 if (time_after(jiffies, now + 15 * HZ))
241 CERROR("long journal start time %lus\n", (jiffies - now) / HZ);
247 fsfilt_brw_start(struct obd_device *obd, int objcount,
248 struct fsfilt_objinfo *fso, int niocount,
249 struct niobuf_local *nb, struct obd_trans_info *oti)
251 return fsfilt_brw_start_log(obd, objcount, fso, niocount, nb, oti, 0);
255 fsfilt_commit_async(struct obd_device *obd, struct inode *inode,
256 void *handle, void **wait_handle)
258 unsigned long now = jiffies;
259 int rc = obd->obd_fsops->fs_commit_async(inode, handle, wait_handle);
261 CDEBUG(D_HA, "committing handle %p (async)\n", *wait_handle);
262 if (time_after(jiffies, now + 15 * HZ))
263 CERROR("long journal start time %lus\n", (jiffies - now) / HZ);
269 fsfilt_commit_wait(struct obd_device *obd, struct inode *inode, void *handle)
271 unsigned long now = jiffies;
272 int rc = obd->obd_fsops->fs_commit_wait(inode, handle);
273 CDEBUG(D_HA, "waiting for completion %p\n", handle);
274 if (time_after(jiffies, now + 15 * HZ))
275 CERROR("long journal start time %lus\n", (jiffies - now) / HZ);
280 fsfilt_setattr(struct obd_device *obd, struct dentry *dentry,
281 void *handle, struct iattr *iattr, int do_trunc)
283 unsigned long now = jiffies;
285 rc = obd->obd_fsops->fs_setattr(dentry, handle, iattr, do_trunc);
286 if (time_after(jiffies, now + 15 * HZ))
287 CERROR("long setattr time %lus\n", (jiffies - now) / HZ);
292 fsfilt_iocontrol(struct obd_device *obd, struct inode *inode,
293 struct file *file, unsigned int cmd,
296 return obd->obd_fsops->fs_iocontrol(inode, file, cmd, arg);
299 static inline int fsfilt_setup(struct obd_device *obd,
300 struct super_block *fs)
302 if (obd->obd_fsops->fs_setup)
303 return obd->obd_fsops->fs_setup(fs);
309 fsfilt_set_md(struct obd_device *obd, struct inode *inode,
310 void *handle, void *md, int size)
312 return obd->obd_fsops->fs_set_md(inode, handle, md, size);
316 fsfilt_get_md(struct obd_device *obd, struct inode *inode,
319 return obd->obd_fsops->fs_get_md(inode, md, size);
322 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
324 fsfilt_send_bio(struct obd_device *obd, struct inode *inode,
328 fsfilt_send_bio(struct obd_device *obd, struct inode *inode,
332 return obd->obd_fsops->fs_send_bio(inode, bio);
336 fsfilt_putpage(struct obd_device *obd, struct inode *inode,
340 struct filter_obd *filter;
341 unsigned long now = jiffies;
343 LASSERT(obd != NULL);
344 LASSERT(inode != NULL);
345 LASSERT(page != NULL);
347 filter = &obd->u.filter;
349 if (!obd->obd_fsops->fs_putpage)
352 CDEBUG(D_INFO, "putpage %lx\n", page->index);
354 rc = obd->obd_fsops->fs_putpage(inode, page);
356 if (time_after(jiffies, now + 15 * HZ))
357 CERROR("long putpage time %lus\n", (jiffies - now) / HZ);
362 static inline struct page *
363 fsfilt_getpage(struct obd_device *obd, struct inode *inode,
367 unsigned long now = jiffies;
369 LASSERT(obd != NULL);
370 LASSERT(inode != NULL);
372 if (!obd->obd_fsops->fs_getpage)
373 return ERR_PTR(-ENOSYS);
375 CDEBUG(D_INFO, "getpage %lx\n", index);
377 page = obd->obd_fsops->fs_getpage(inode, index);
379 if (time_after(jiffies, now + 15 * HZ))
380 CERROR("long getpage time %lus\n", (jiffies - now) / HZ);
385 static inline ssize_t
386 fsfilt_readpage(struct obd_device *obd, struct file *file, char *buf,
387 size_t count, loff_t *offset)
389 return obd->obd_fsops->fs_readpage(file, buf, count, offset);
393 fsfilt_add_journal_cb(struct obd_device *obd, struct super_block *sb,
394 __u64 last_rcvd, void *handle, fsfilt_cb_t cb_func,
397 return obd->obd_fsops->fs_add_journal_cb(obd, sb, last_rcvd, handle,
401 /* very similar to obd_statfs(), but caller already holds obd_osfs_lock */
403 fsfilt_statfs(struct obd_device *obd, struct super_block *sb,
404 unsigned long max_age)
408 CDEBUG(D_SUPER, "osfs %lu, max_age %lu\n", obd->obd_osfs_age, max_age);
409 if (time_before(obd->obd_osfs_age, max_age)) {
410 rc = obd->obd_fsops->fs_statfs(sb, &obd->obd_osfs);
411 if (rc == 0) /* N.B. statfs can't really fail */
412 obd->obd_osfs_age = jiffies;
414 CDEBUG(D_SUPER, "using cached obd_statfs data\n");
421 fsfilt_sync(struct obd_device *obd, struct super_block *sb)
423 return obd->obd_fsops->fs_sync(sb);
427 fsfilt_map_inode_page(struct obd_device *obd, struct inode *inode,
428 struct page *page, unsigned long *blocks,
429 int *created, int create)
431 return obd->obd_fsops->fs_map_inode_page(inode, page, blocks,
436 fs_prep_san_write(struct obd_device *obd, struct inode *inode,
437 long *blocks, int nblocks, loff_t newsize)
439 return obd->obd_fsops->fs_prep_san_write(inode, blocks,
444 fsfilt_read_record(struct obd_device *obd, struct file *file,
445 void *buf, loff_t size, loff_t *offs)
447 return obd->obd_fsops->fs_read_record(file, buf, size, offs);
451 fsfilt_write_record(struct obd_device *obd, struct file *file,
452 void *buf, loff_t size, loff_t *offs, int force_sync)
454 return obd->obd_fsops->fs_write_record(file, buf, size, offs,
459 llog_fsfilt_write_record(struct llog_ctxt *ctxt, struct file *file,
460 void *buf, loff_t size, loff_t *offs,
463 return ctxt->loc_fsops->fs_write_record(file, buf, size, offs,
468 llog_fsfilt_read_record(struct llog_ctxt *ctxt, struct file *file,
469 void *buf, loff_t size, loff_t *offs)
471 return ctxt->loc_fsops->fs_read_record(file, buf, size, offs);
474 #endif /* __KERNEL__ */