1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (C) 2001 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>
33 typedef void (*fsfilt_cb_t)(struct obd_device *obd, __u64 last_rcvd,
34 void *data, int error);
36 struct fsfilt_objinfo {
37 struct dentry *fso_dentry;
41 struct fsfilt_operations {
42 struct list_head fs_list;
43 struct module *fs_owner;
45 void *(* fs_start)(struct inode *inode, int op, void *desc_private);
46 void *(* fs_brw_start)(int objcount, struct fsfilt_objinfo *fso,
47 int niocount, void *desc_private);
48 int (* fs_commit)(struct inode *inode, void *handle,int force_sync);
49 int (* fs_setattr)(struct dentry *dentry, void *handle,
50 struct iattr *iattr, int do_trunc);
51 int (* fs_set_md)(struct inode *inode, void *handle, void *md,
53 int (* fs_get_md)(struct inode *inode, void *md, int size);
54 ssize_t (* fs_readpage)(struct file *file, char *buf, size_t count,
56 int (* fs_journal_data)(struct file *file);
57 int (* fs_set_last_rcvd)(struct obd_device *obd, __u64 last_rcvd,
58 void *handle, fsfilt_cb_t cb_func,
60 int (* fs_statfs)(struct super_block *sb, struct obd_statfs *osfs);
61 int (* fs_sync)(struct super_block *sb);
62 int (* fs_prep_san_write)(struct inode *inode, long *blocks,
63 int nblocks, loff_t newsize);
64 int (* fs_write_record)(struct file *, char *, int size, loff_t *);
65 int (* fs_read_record)(struct file *, char *, int size, loff_t *);
68 extern int fsfilt_register_ops(struct fsfilt_operations *fs_ops);
69 extern void fsfilt_unregister_ops(struct fsfilt_operations *fs_ops);
70 extern struct fsfilt_operations *fsfilt_get_ops(const char *type);
71 extern void fsfilt_put_ops(struct fsfilt_operations *fs_ops);
73 #define FSFILT_OP_UNLINK 1
74 #define FSFILT_OP_RMDIR 2
75 #define FSFILT_OP_RENAME 3
76 #define FSFILT_OP_CREATE 4
77 #define FSFILT_OP_MKDIR 5
78 #define FSFILT_OP_SYMLINK 6
79 #define FSFILT_OP_MKNOD 7
80 #define FSFILT_OP_SETATTR 8
81 #define FSFILT_OP_LINK 9
82 #define FSFILT_OP_CREATE_LOG 10
83 #define FSFILT_OP_UNLINK_LOG 11
85 static inline void *fsfilt_start(struct obd_device *obd, struct inode *inode,
86 int op, struct obd_trans_info *oti)
88 unsigned long now = jiffies;
89 void *parent_handle = oti ? oti->oti_handle : NULL;
90 void *handle = obd->obd_fsops->fs_start(inode, op, parent_handle);
91 CDEBUG(D_HA, "started handle %p (%p)\n", handle, parent_handle);
94 if (parent_handle == NULL) {
95 oti->oti_handle = handle;
96 } else if (handle != parent_handle) {
97 CERROR("mismatch: parent %p, handle %p, oti %p\n",
98 parent_handle, handle, oti->oti_handle);
102 if (time_after(jiffies, now + 15 * HZ))
103 CERROR("long journal start time %lus\n", (jiffies - now) / HZ);
107 static inline void *fsfilt_brw_start(struct obd_device *obd, int objcount,
108 struct fsfilt_objinfo *fso, int niocount,
109 struct obd_trans_info *oti)
111 unsigned long now = jiffies;
112 void *parent_handle = oti ? oti->oti_handle : NULL;
115 handle = obd->obd_fsops->fs_brw_start(objcount, fso, niocount,
117 CDEBUG(D_HA, "started handle %p (%p)\n", handle, parent_handle);
120 if (parent_handle == NULL) {
121 oti->oti_handle = handle;
122 } else if (handle != parent_handle) {
123 CERROR("mismatch: parent %p, handle %p, oti %p\n",
124 parent_handle, handle, oti->oti_handle);
128 if (time_after(jiffies, now + 15 * HZ))
129 CERROR("long journal start time %lus\n", (jiffies - now) / HZ);
133 static inline int fsfilt_commit(struct obd_device *obd, struct inode *inode,
134 void *handle, int force_sync)
136 unsigned long now = jiffies;
137 int rc = obd->obd_fsops->fs_commit(inode, handle, force_sync);
138 CDEBUG(D_HA, "committing handle %p\n", handle);
139 if (time_after(jiffies, now + 15 * HZ))
140 CERROR("long journal start time %lus\n", (jiffies - now) / HZ);
144 static inline int fsfilt_setattr(struct obd_device *obd, struct dentry *dentry,
145 void *handle, struct iattr *iattr,int do_trunc)
147 unsigned long now = jiffies;
149 rc = obd->obd_fsops->fs_setattr(dentry, handle, iattr, do_trunc);
150 if (time_after(jiffies, now + 15 * HZ))
151 CERROR("long setattr time %lus\n", (jiffies - now) / HZ);
155 static inline int fsfilt_set_md(struct obd_device *obd, struct inode *inode,
156 void *handle, void *md, int size)
158 return obd->obd_fsops->fs_set_md(inode, handle, md, size);
161 static inline int fsfilt_get_md(struct obd_device *obd, struct inode *inode,
164 return obd->obd_fsops->fs_get_md(inode, md, size);
167 static inline ssize_t fsfilt_readpage(struct obd_device *obd,
168 struct file *file, char *buf,
169 size_t count, loff_t *offset)
171 return obd->obd_fsops->fs_readpage(file, buf, count, offset);
174 static inline int fsfilt_journal_data(struct obd_device *obd, struct file *file)
176 return obd->obd_fsops->fs_journal_data(file);
179 static inline int fsfilt_set_last_rcvd(struct obd_device *obd, __u64 last_rcvd,
180 void *handle, fsfilt_cb_t cb_func,
183 return obd->obd_fsops->fs_set_last_rcvd(obd, last_rcvd, handle,
187 static inline int fsfilt_statfs(struct obd_device *obd, struct super_block *fs,
188 struct obd_statfs *osfs)
190 return obd->obd_fsops->fs_statfs(fs, osfs);
193 static inline int fsfilt_sync(struct obd_device *obd, struct super_block *fs)
195 return obd->obd_fsops->fs_sync(fs);
198 static inline int fs_prep_san_write(struct obd_device *obd,
204 return obd->obd_fsops->fs_prep_san_write(inode, blocks,
208 static inline int fsfilt_read_record(struct obd_device *obd, struct file *file,
209 char *buf, loff_t size, loff_t *offs)
211 return obd->obd_fsops->fs_read_record(file, buf, size, offs);
214 static inline int fsfilt_write_record(struct obd_device *obd, struct file *file,
215 char *buf, loff_t size, loff_t *offs)
217 return obd->obd_fsops->fs_write_record(file, buf, size, offs);
220 #endif /* __KERNEL__ */