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[fs/lustre-release.git] / lustre / include / linux / lustre_lite.h
1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2  * vim:expandtab:shiftwidth=8:tabstop=8:
3  *
4  * lustre lite cluster file system
5  *
6  * This code is issued under the GNU General Public License.
7  * See the file COPYING in this distribution
8  *
9  * Copyright (C) 2002 Cluster File Systems, Inc. <info@clusterfs.com>
10  */
11
12
13
14 #ifndef _LL_H
15 #define _LL_H
16
17 #ifdef __KERNEL__
18
19 #include <linux/version.h>
20
21 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
22 #include <asm/statfs.h>
23 #endif
24
25 #include <linux/fs.h>
26 #include <linux/dcache.h>
27 #include <linux/jbd.h>
28 #include <linux/ext3_fs.h>
29 #include <linux/proc_fs.h>
30
31 #include <linux/obd_class.h>
32 #include <linux/lustre_net.h>
33 #include <linux/lustre_mds.h>
34 #include <linux/lustre_ha.h>
35
36 #include <linux/rbtree.h>
37 #include <linux/lustre_compat25.h>
38 #include <linux/pagemap.h>
39
40 /* careful, this is easy to screw up */
41 #define PAGE_CACHE_MAXBYTES ((__u64)(~0UL) << PAGE_CACHE_SHIFT)
42
43
44 /*
45 struct lustre_intent_data {
46         __u64 it_lock_handle[2];
47         __u32 it_disposition;
48         __u32 it_status;
49         __u32 it_lock_mode;
50         }; */
51
52 #define LL_IT2STR(it) ((it) ? ldlm_it2str((it)->it_op) : "0")
53
54 static inline struct lookup_intent *ll_nd2it(struct nameidata *nd)
55 {
56 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
57         return &nd->intent;
58 #else
59         return nd->intent;
60 #endif
61 }
62
63 struct ll_dentry_data {
64         int                      lld_cwd_count;
65         int                      lld_mnt_count;
66         struct obd_client_handle lld_cwd_och;
67         struct obd_client_handle lld_mnt_och;
68 };
69
70 #define ll_d2d(de) ((struct ll_dentry_data*) de->d_fsdata)
71
72 extern struct file_operations ll_pgcache_seq_fops;
73
74 #define LLI_INODE_MAGIC                 0x111d0de5
75 #define LLI_INODE_DEAD                  0xdeadd00d
76 #define LLI_F_HAVE_OST_SIZE_LOCK        0
77 #define LLI_F_HAVE_MDS_SIZE_LOCK        1
78 #define LLI_F_PREFER_EXTENDED_SIZE      2
79 struct ll_inode_info {
80         int                     lli_inode_magic;
81         struct lov_stripe_md   *lli_smd;
82         struct mea             *lli_mea;
83         char                   *lli_symlink_name;
84         struct semaphore        lli_open_sem;
85         __u64                   lli_maxbytes;
86         __u64                   lli_io_epoch;
87         unsigned long           lli_flags;
88         __u32                   lli_mds;
89
90         /* this lock protects s_d_w and p_w_ll */
91         spinlock_t              lli_lock;
92         int                     lli_send_done_writing;
93         
94         int                     lli_snap_index;
95         
96         struct list_head        lli_pending_write_llaps;
97
98         struct list_head        lli_close_item;
99
100         struct file_operations *ll_save_ifop;
101         struct file_operations *ll_save_ffop;
102         struct file_operations *ll_save_wfop;
103         struct file_operations *ll_save_wrfop;
104 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
105         struct inode            lli_vfs_inode;
106 #endif
107 };
108
109 // FIXME: replace the name of this with LL_I to conform to kernel stuff
110 // static inline struct ll_inode_info *LL_I(struct inode *inode)
111 static inline struct ll_inode_info *ll_i2info(struct inode *inode)
112 {
113 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
114         return container_of(inode, struct ll_inode_info, lli_vfs_inode);
115 #else
116         return (struct ll_inode_info *)&(inode->u.generic_ip);
117 #endif
118 }
119
120 /* lprocfs.c */
121 enum {
122          LPROC_LL_DIRTY_HITS = 0,
123          LPROC_LL_DIRTY_MISSES,
124          LPROC_LL_WB_WRITEPAGE,
125          LPROC_LL_WB_PRESSURE,
126          LPROC_LL_WB_OK,
127          LPROC_LL_WB_FAIL,
128          LPROC_LL_READ_BYTES,
129          LPROC_LL_WRITE_BYTES,
130          LPROC_LL_BRW_READ,
131          LPROC_LL_BRW_WRITE,
132          LPROC_LL_IOCTL,
133          LPROC_LL_OPEN,
134          LPROC_LL_RELEASE,
135          LPROC_LL_MAP,
136          LPROC_LL_LLSEEK,
137          LPROC_LL_FSYNC,
138          LPROC_LL_SETATTR,
139          LPROC_LL_TRUNC,
140
141 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
142          LPROC_LL_GETATTR,
143 #else
144          LPROC_LL_REVALIDATE,
145 #endif
146          LPROC_LL_STAFS,
147          LPROC_LL_ALLOC_INODE,
148
149          LPROC_LL_DIRECT_READ,
150          LPROC_LL_DIRECT_WRITE,
151          LPROC_LL_FILE_OPCODES
152 };
153
154 static inline void ll_inode2fid(struct ll_fid *fid, struct inode *inode)
155 {
156         mdc_pack_fid(fid, inode->i_ino, inode->i_generation,
157                      inode->i_mode & S_IFMT);
158         LASSERT(ll_i2info(inode));
159         fid->mds = ll_i2info(inode)->lli_mds;
160 }
161
162 static inline void 
163 ll_prepare_mdc_op_data(struct mdc_op_data *data, struct inode *i1,
164                        struct inode *i2, const char *name, int namelen,
165                        int mode)
166 {
167         LASSERT(i1);
168
169         ll_inode2fid(&data->fid1, i1);
170
171         /* it could be directory with mea */
172         data->mea1 = ll_i2info(i1)->lli_mea;
173
174         if (i2) {
175                 ll_inode2fid(&data->fid2, i2);
176                 data->mea2 = ll_i2info(i2)->lli_mea;
177         }
178
179         data->name = name;
180         data->namelen = namelen;
181         data->create_mode = mode;
182         data->mod_time = LTIME_S(CURRENT_TIME);
183 }
184
185 #else
186 #include <linux/lustre_idl.h>
187 #endif /* __KERNEL__ */
188
189 #include <lustre/lustre_user.h>
190
191 #endif