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exofs: debug print even less
[net-next-2.6.git] / fs / exofs / exofs.h
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b14f8ab2
BH		 1/*
2 * Copyright (C) 2005, 2006
27d2e149 3 * Avishay Traeger (avishay@gmail.com)
b14f8ab2
BH		 4 * Copyright (C) 2008, 2009
5 * Boaz Harrosh <bharrosh@panasas.com>
6 *
7 * Copyrights for code taken from ext2:
8 * Copyright (C) 1992, 1993, 1994, 1995
9 * Remy Card (card@masi.ibp.fr)
10 * Laboratoire MASI - Institut Blaise Pascal
11 * Universite Pierre et Marie Curie (Paris VI)
12 * from
13 * linux/fs/minix/inode.c
14 * Copyright (C) 1991, 1992 Linus Torvalds
15 *
16 * This file is part of exofs.
17 *
18 * exofs is free software; you can redistribute it and/or modify
19 * it under the terms of the GNU General Public License as published by
20 * the Free Software Foundation. Since it is based on ext2, and the only
21 * valid version of GPL for the Linux kernel is version 2, the only valid
22 * version of GPL for exofs is version 2.
23 *
24 * exofs is distributed in the hope that it will be useful,
25 * but WITHOUT ANY WARRANTY; without even the implied warranty of
26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
27 * GNU General Public License for more details.
28 *
29 * You should have received a copy of the GNU General Public License
30 * along with exofs; if not, write to the Free Software
31 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
32 */
06886a5a
BH		 33#ifndef __EXOFS_H__
34#define __EXOFS_H__
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BH		 35
36#include <linux/fs.h>
37#include <linux/time.h>
38#include "common.h"
39
04dc1e88
BH		 40/* FIXME: Remove once pnfs hits mainline
41 * #include <linux/exportfs/pnfs_osd_xdr.h>
42 */
43#include "pnfs.h"
44
b14f8ab2
BH		 45#define EXOFS_ERR(fmt, a...) printk(KERN_ERR "exofs: " fmt, ##a)
46
47#ifdef CONFIG_EXOFS_DEBUG
48#define EXOFS_DBGMSG(fmt, a...) \
49 printk(KERN_NOTICE "exofs @%s:%d: " fmt, __func__, __LINE__, ##a)
50#else
51#define EXOFS_DBGMSG(fmt, a...) \
52 do { if (0) printk(fmt, ##a); } while (0)
53#endif
54
55/* u64 has problems with printk this will cast it to unsigned long long */
56#define _LLU(x) (unsigned long long)(x)
57
58/*
59 * our extension to the in-memory superblock
60 */
61struct exofs_sb_info {
06886a5a 62 struct exofs_fscb s_fscb; /* Written often, pre-allocate*/
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BH		 63 osd_id s_pid; /* partition ID of file system*/
64 int s_timeout; /* timeout for OSD operations */
65 uint64_t s_nextid; /* highest object ID used */
66 uint32_t s_numfiles; /* number of files on fs */
67 spinlock_t s_next_gen_lock; /* spinlock for gen # update */
68 u32 s_next_generation; /* next gen # to use */
69 atomic_t s_curr_pending; /* number of pending commands */
04dc1e88
BH		 70 uint8_t s_cred[OSD_CAP_LEN]; /* credential for the fscb */
71
72 struct pnfs_osd_data_map data_map; /* Default raid to use */
73 unsigned s_numdevs; /* Num of devices in array */
74 struct osd_dev *s_ods[1]; /* Variable length, minimum 1 */
b14f8ab2
BH		 75};
76
77/*
78 * our extension to the in-memory inode
79 */
80struct exofs_i_info {
81 unsigned long i_flags; /* various atomic flags */
82 uint32_t i_data[EXOFS_IDATA];/*short symlink names and device #s*/
83 uint32_t i_dir_start_lookup; /* which page to start lookup */
84 wait_queue_head_t i_wq; /* wait queue for inode */
85 uint64_t i_commit_size; /* the object's written length */
86 uint8_t i_cred[OSD_CAP_LEN];/* all-powerful credential */
87 struct inode vfs_inode; /* normal in-memory inode */
88};
89
06886a5a
BH		 90static inline osd_id exofs_oi_objno(struct exofs_i_info *oi)
91{
92 return oi->vfs_inode.i_ino + EXOFS_OBJ_OFF;
93}
94
95struct exofs_io_state;
96typedef void (*exofs_io_done_fn)(struct exofs_io_state *or, void *private);
97
98struct exofs_io_state {
99 struct kref kref;
100
101 void *private;
102 exofs_io_done_fn done;
103
104 struct exofs_sb_info *sbi;
105 struct osd_obj_id obj;
106 u8 *cred;
107
108 /* Global read/write IO*/
109 loff_t offset;
110 unsigned long length;
111 void *kern_buff;
112 struct bio *bio;
113
114 /* Attributes */
115 unsigned in_attr_len;
116 struct osd_attr *in_attr;
117 unsigned out_attr_len;
118 struct osd_attr *out_attr;
119
120 /* Variable array of size numdevs */
121 unsigned numdevs;
122 struct exofs_per_dev_state {
123 struct osd_request *or;
124 struct bio *bio;
125 } per_dev[];
126};
127
128static inline unsigned exofs_io_state_size(unsigned numdevs)
129{
130 return sizeof(struct exofs_io_state) +
131 sizeof(struct exofs_per_dev_state) * numdevs;
132}
133
b14f8ab2
BH		 134/*
135 * our inode flags
136 */
137#define OBJ_2BCREATED 0 /* object will be created soon*/
138#define OBJ_CREATED 1 /* object has been created on the osd*/
139
140static inline int obj_2bcreated(struct exofs_i_info *oi)
141{
142 return test_bit(OBJ_2BCREATED, &oi->i_flags);
143}
144
145static inline void set_obj_2bcreated(struct exofs_i_info *oi)
146{
147 set_bit(OBJ_2BCREATED, &oi->i_flags);
148}
149
150static inline int obj_created(struct exofs_i_info *oi)
151{
152 return test_bit(OBJ_CREATED, &oi->i_flags);
153}
154
155static inline void set_obj_created(struct exofs_i_info *oi)
156{
157 set_bit(OBJ_CREATED, &oi->i_flags);
158}
159
160int __exofs_wait_obj_created(struct exofs_i_info *oi);
161static inline int wait_obj_created(struct exofs_i_info *oi)
162{
163 if (likely(obj_created(oi)))
164 return 0;
165
166 return __exofs_wait_obj_created(oi);
167}
168
169/*
170 * get to our inode from the vfs inode
171 */
172static inline struct exofs_i_info *exofs_i(struct inode *inode)
173{
174 return container_of(inode, struct exofs_i_info, vfs_inode);
175}
176
e6af00f1
BH		 177/*
178 * Maximum count of links to a file
179 */
180#define EXOFS_LINK_MAX 32000
181
e8062719
BH		 182/*************************
183 * function declarations *
184 *************************/
06886a5a
BH		 185
186/* ios.c */
187void exofs_make_credential(u8 cred_a[OSD_CAP_LEN],
188 const struct osd_obj_id *obj);
189int exofs_read_kern(struct osd_dev *od, u8 *cred, struct osd_obj_id *obj,
190 u64 offset, void *p, unsigned length);
191
192int exofs_get_io_state(struct exofs_sb_info *sbi, struct exofs_io_state** ios);
193void exofs_put_io_state(struct exofs_io_state *ios);
194
195int exofs_check_io(struct exofs_io_state *ios, u64 *resid);
196
197int exofs_sbi_create(struct exofs_io_state *ios);
198int exofs_sbi_remove(struct exofs_io_state *ios);
199int exofs_sbi_write(struct exofs_io_state *ios);
200int exofs_sbi_read(struct exofs_io_state *ios);
201
202int extract_attr_from_ios(struct exofs_io_state *ios, struct osd_attr *attr);
203
204int exofs_oi_truncate(struct exofs_i_info *oi, u64 new_len);
205static inline int exofs_oi_write(struct exofs_i_info *oi,
206 struct exofs_io_state *ios)
207{
208 ios->obj.id = exofs_oi_objno(oi);
209 ios->cred = oi->i_cred;
210 return exofs_sbi_write(ios);
211}
212
213static inline int exofs_oi_read(struct exofs_i_info *oi,
214 struct exofs_io_state *ios)
215{
216 ios->obj.id = exofs_oi_objno(oi);
217 ios->cred = oi->i_cred;
218 return exofs_sbi_read(ios);
219}
220
e8062719
BH		 221/* inode.c */
222void exofs_truncate(struct inode *inode);
223int exofs_setattr(struct dentry *, struct iattr *);
beaec07b
BH		 224int exofs_write_begin(struct file *file, struct address_space *mapping,
225 loff_t pos, unsigned len, unsigned flags,
226 struct page **pagep, void **fsdata);
e6af00f1
BH		 227extern struct inode *exofs_iget(struct super_block *, unsigned long);
228struct inode *exofs_new_inode(struct inode *, int);
ba9e5e98
BH		 229extern int exofs_write_inode(struct inode *, int);
230extern void exofs_delete_inode(struct inode *);
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BH		 231
232/* dir.c: */
233int exofs_add_link(struct dentry *, struct inode *);
234ino_t exofs_inode_by_name(struct inode *, struct dentry *);
235int exofs_delete_entry(struct exofs_dir_entry *, struct page *);
236int exofs_make_empty(struct inode *, struct inode *);
237struct exofs_dir_entry *exofs_find_entry(struct inode *, struct dentry *,
238 struct page **);
239int exofs_empty_dir(struct inode *);
240struct exofs_dir_entry *exofs_dotdot(struct inode *, struct page **);
8cf74b39 241ino_t exofs_parent_ino(struct dentry *child);
e6af00f1
BH		 242int exofs_set_link(struct inode *, struct exofs_dir_entry *, struct page *,
243 struct inode *);
e8062719 244
baaf94cd
BH		 245/* super.c */
246int exofs_sync_fs(struct super_block *sb, int wait);
247
e8062719
BH		 248/*********************
249 * operation vectors *
250 *********************/
e6af00f1
BH		 251/* dir.c: */
252extern const struct file_operations exofs_dir_operations;
253
e8062719
BH		 254/* file.c */
255extern const struct inode_operations exofs_file_inode_operations;
256extern const struct file_operations exofs_file_operations;
257
beaec07b
BH		 258/* inode.c */
259extern const struct address_space_operations exofs_aops;
06886a5a 260extern const struct osd_attr g_attr_logical_length;
beaec07b 261
e6af00f1
BH		 262/* namei.c */
263extern const struct inode_operations exofs_dir_inode_operations;
264extern const struct inode_operations exofs_special_inode_operations;
265
982980d7
BH		 266/* symlink.c */
267extern const struct inode_operations exofs_symlink_inode_operations;
268extern const struct inode_operations exofs_fast_symlink_inode_operations;
269
b14f8ab2 270#endif
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