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/fs.h>
  20 #include <linux/ext2_fs.h>
  21
  22 #include <linux/obd_class.h>
  23 #include <linux/lustre_net.h>
  24 #include <linux/lustre_mds.h>
  25 #include <linux/lustre_ha.h>
  26
  27 extern kmem_cache_t *ll_file_data_slab;
  28 struct ll_file_data {
  29         struct lustre_handle fd_mdshandle;
  30         struct lustre_handle fd_osthandle;
  31         struct ptlrpc_request *fd_req;
  32         __u32 fd_flags;
  33 };
  34
  35
  36 struct ll_read_inode2_cookie {
  37         struct mds_body *lic_body;
  38         struct lov_mds_md *lic_lmm;
  39 };
  40
  41 #define LL_INLINESZ      60
  42 struct ll_inode_info {
  43         struct lov_stripe_md *lli_smd;
  44         char                 *lli_symlink_name;
  45         struct lustre_handle  lli_intent_lock_handle;
  46         struct semaphore      lli_open_sem;
  47         __u32                 lli_mount_epoch;
  48 };
  49
  50 #define LL_SUPER_MAGIC 0x0BD00BD0
  51
  52 #define LL_COMMITCBD_STOPPING  0x1
  53 #define LL_COMMITCBD_STOPPED   0x2
  54 #define LL_COMMITCBD_RUNNING   0x4
  55
  56 #define LL_SBI_NOLCK   0x1
  57
  58 struct ll_sb_info {
  59         obd_uuid_t                ll_sb_uuid;
  60         struct lustre_handle      ll_mdc_conn;
  61         struct lustre_handle      ll_osc_conn;
  62         obd_id                    ll_rootino; /* number of root inode */
  63
  64         int                       ll_flags;
  65         wait_queue_head_t         ll_commitcbd_waitq;
  66         wait_queue_head_t         ll_commitcbd_ctl_waitq;
  67         int                       ll_commitcbd_flags;
  68         struct task_struct       *ll_commitcbd_thread;
  69         time_t                    ll_commitcbd_waketime;
  70         time_t                    ll_commitcbd_timeout;
  71         spinlock_t                ll_commitcbd_lock;
  72         struct list_head          ll_conn_chain; /* per-conn chain of SBs */
  73         __u32                     ll_mount_epoch;
  74 };
  75
  76 #define CHECK_MOUNT_EPOCH(i)                                                  \
  77 do {                                                                          \
  78         if (ll_i2info(i)->lli_mount_epoch != ll_i2sbi(i)->ll_mount_epoch)     \
  79                 RETURN(-EIO);                                                 \
  80 } while(0)
  81
  82 static inline struct ll_sb_info *ll_s2sbi(struct super_block *sb)
  83 {
  84         return (struct ll_sb_info *)(sb->u.generic_sbp);
  85 }
  86
  87 static inline struct lustre_handle *ll_s2obdconn(struct super_block *sb)
  88 {
  89         return &(ll_s2sbi(sb))->ll_osc_conn;
  90 }
  91
  92 static inline struct client_obd *sbi2mdc(struct ll_sb_info *sbi)
  93 {
  94         struct obd_device *obd = class_conn2obd(&sbi->ll_mdc_conn);
  95         if (obd == NULL)
  96                 LBUG();
  97         return &obd->u.cli;
  98 }
  99
 100 static inline struct ll_sb_info *ll_i2sbi(struct inode *inode)
 101 {
 102         return ll_s2sbi(inode->i_sb);
 103 }
 104
 105 static inline struct ll_inode_info *ll_i2info(struct inode *inode)
 106 {
 107         return (struct ll_inode_info *)&(inode->u.generic_ip);
 108 }
 109
 110 static inline struct lustre_handle *ll_i2obdconn(struct inode *inode)
 111 {
 112         return ll_s2obdconn(inode->i_sb);
 113 }
 114
 115 static inline void ll_ino2fid(struct ll_fid *fid, obd_id ino, __u32 generation,
 116                               int type)
 117 {
 118         fid->id = ino;
 119         fid->generation = generation;
 120         fid->f_type = type;
 121 }
 122
 123 static inline void ll_inode2fid(struct ll_fid *fid, struct inode *inode)
 124 {
 125         ll_ino2fid(fid, inode->i_ino, inode->i_generation,
 126                    inode->i_mode & S_IFMT);
 127 }
 128
 129 static inline int ll_mds_easize(struct super_block *sb)
 130 {
 131         return sbi2mdc(ll_s2sbi(sb))->cl_max_mds_easize;
 132 }
 133
 134 static inline int ll_ost_easize(struct super_block *sb)
 135 {
 136         return sbi2mdc(ll_s2sbi(sb))->cl_max_ost_easize;
 137 }
 138
 139 /* namei.c */
 140 int ll_lock(struct inode *dir, struct dentry *dentry,
 141             struct lookup_intent *it, struct lustre_handle *lockh);
 142 int ll_unlock(__u32 mode, struct lustre_handle *lockh);
 143
 144 /* dcache.c */
 145 void ll_intent_release(struct dentry *de);
 146
 147 /* dir.c */
 148 extern struct file_operations ll_dir_operations;
 149 extern struct inode_operations ll_dir_inode_operations;
 150
 151 /* file.c */
 152 extern struct file_operations ll_file_operations;
 153 extern struct inode_operations ll_file_inode_operations;
 154 struct ldlm_lock;
 155 int ll_lock_callback(struct ldlm_lock *, struct ldlm_lock_desc *, void *data,
 156                      __u32 data_len, int flag);
 157 int ll_size_lock(struct inode *, struct lov_stripe_md *, __u64 start, int mode,
 158                  struct lustre_handle **);
 159 int ll_size_unlock(struct inode *, struct lov_stripe_md *, int mode,
 160                    struct lustre_handle *);
 161 int ll_file_size(struct inode *inode, struct lov_stripe_md *md);
 162
 163 /* rw.c */
 164 struct page *ll_getpage(struct inode *inode, unsigned long offset,
 165                         int create, int locked);
 166 void ll_truncate(struct inode *inode);
 167
 168 /* super.c */
 169 void ll_update_inode(struct inode *, struct mds_body *);
 170
 171 /* symlink.c */
 172 extern struct inode_operations ll_fast_symlink_inode_operations;
 173 extern struct inode_operations ll_symlink_inode_operations;
 174
 175 /* sysctl.c */
 176 void ll_sysctl_init(void);
 177 void ll_sysctl_clean(void);
 178
 179 #endif /* __KERNEL__ */
 180
 181 #define LL_IOC_GETFLAGS                 _IOR ('f', 151, long)
 182 #define LL_IOC_SETFLAGS                 _IOW ('f', 152, long)
 183 #define LL_IOC_CLRFLAGS                 _IOW ('f', 153, long)
 184
 185 #define LL_FILE_IGNORE_LOCK             0x00000001
 186
 187 #endif