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 #include <linux/fs.h>
  18 #include <linux/ext2_fs.h>
  19
  20 #include <linux/obd_class.h>
  21 #include <linux/lustre_net.h>
  22 #include <linux/lustre_mds.h>
  23 #include <linux/lustre_ha.h>
  24
  25 extern kmem_cache_t *ll_file_data_slab;
  26 struct ll_file_data {
  27         __u64 fd_mdshandle;
  28         struct lustre_handle fd_osthandle;
  29         struct ptlrpc_request *fd_req;
  30         __u32 fd_flags;
  31 };
  32
  33
  34 struct ll_read_inode2_cookie {
  35         struct mds_body *lic_body;
  36         struct lov_mds_md *lic_lmm;
  37 };
  38
  39 #define LL_IOC_GETFLAGS                 _IOR ('f', 151, long)
  40 #define LL_IOC_SETFLAGS                 _IOW ('f', 152, long)
  41 #define LL_IOC_CLRFLAGS                 _IOW ('f', 153, long)
  42
  43 #define LL_FILE_IGNORE_LOCK             0x00000001
  44
  45 #define LL_INLINESZ      60
  46 struct ll_inode_info {
  47         struct lov_stripe_md *lli_smd;
  48         char                 *lli_symlink_name;
  49         struct lustre_handle  lli_intent_lock_handle;
  50         struct semaphore      lli_open_sem;
  51         __u32                 lli_mount_epoch;
  52 };
  53
  54 #define LL_SUPER_MAGIC 0x0BD00BD0
  55
  56 #define LL_COMMITCBD_STOPPING  0x1
  57 #define LL_COMMITCBD_STOPPED   0x2
  58 #define LL_COMMITCBD_RUNNING   0x4
  59
  60 #define LL_SBI_NOLCK   0x1
  61
  62 struct ll_sb_info {
  63         obd_uuid_t                ll_sb_uuid;
  64         struct lustre_handle      ll_mdc_conn;
  65         struct lustre_handle      ll_osc_conn;
  66         obd_id                    ll_rootino; /* number of root inode */
  67
  68         int                       ll_flags;
  69         wait_queue_head_t         ll_commitcbd_waitq;
  70         wait_queue_head_t         ll_commitcbd_ctl_waitq;
  71         int                       ll_commitcbd_flags;
  72         struct task_struct       *ll_commitcbd_thread;
  73         time_t                    ll_commitcbd_waketime;
  74         time_t                    ll_commitcbd_timeout;
  75         spinlock_t                ll_commitcbd_lock;
  76         struct list_head          ll_conn_chain; /* per-conn chain of SBs */
  77         __u32                     ll_mount_epoch;
  78 };
  79
  80 #define CHECK_MOUNT_EPOCH(i)                                                    \
  81 do {                                                                            \
  82         if (ll_i2info(i)->lli_mount_epoch != ll_i2sbi(i)->ll_mount_epoch)       \
  83                 RETURN(-EIO);                                                   \
  84 } while(0)
  85
  86 static inline struct ll_sb_info *ll_s2sbi(struct super_block *sb)
  87 {
  88         return (struct ll_sb_info *)(sb->u.generic_sbp);
  89 }
  90
  91 static inline struct lustre_handle *ll_s2obdconn(struct super_block *sb)
  92 {
  93         return &(ll_s2sbi(sb))->ll_osc_conn;
  94 }
  95
  96 static inline struct client_obd *sbi2mdc(struct ll_sb_info *sbi)
  97 {
  98         struct obd_device *obd = class_conn2obd(&sbi->ll_mdc_conn);
  99         if (obd == NULL)
 100                 LBUG();
 101         return &obd->u.cli;
 102 }
 103
 104 static inline struct ll_sb_info *ll_i2sbi(struct inode *inode)
 105 {
 106         return ll_s2sbi(inode->i_sb);
 107 }
 108
 109 static inline struct ll_inode_info *ll_i2info(struct inode *inode)
 110 {
 111         return (struct ll_inode_info *)&(inode->u.generic_ip);
 112 }
 113
 114 static inline struct lustre_handle *ll_i2obdconn(struct inode *inode)
 115 {
 116         return ll_s2obdconn(inode->i_sb);
 117 }
 118
 119 static inline void ll_ino2fid(struct ll_fid *fid, obd_id ino, __u32 generation,
 120                               int type)
 121 {
 122         fid->id = ino;
 123         fid->generation = generation;
 124         fid->f_type = type;
 125 }
 126
 127 static inline void ll_inode2fid(struct ll_fid *fid, struct inode *inode)
 128 {
 129         ll_ino2fid(fid, inode->i_ino, inode->i_generation,
 130                    inode->i_mode & S_IFMT);
 131 }
 132
 133 static inline int ll_mds_easize(struct super_block *sb)
 134 {
 135         return sbi2mdc(ll_s2sbi(sb))->cl_max_mds_easize;
 136 }
 137
 138 static inline int ll_ost_easize(struct super_block *sb)
 139 {
 140         return sbi2mdc(ll_s2sbi(sb))->cl_max_ost_easize;
 141 }
 142
 143 /* namei.c */
 144 int ll_lock(struct inode *dir, struct dentry *dentry,
 145             struct lookup_intent *it, struct lustre_handle *lockh);
 146 int ll_unlock(__u32 mode, struct lustre_handle *lockh);
 147
 148 /* dcache.c */
 149 void ll_intent_release(struct dentry *de);
 150
 151 /* dir.c */
 152 extern struct file_operations ll_dir_operations;
 153 extern struct inode_operations ll_dir_inode_operations;
 154
 155 /* file.c */
 156 extern struct file_operations ll_file_operations;
 157 extern struct inode_operations ll_file_inode_operations;
 158 struct ldlm_lock;
 159 int ll_lock_callback(struct ldlm_lock *, struct ldlm_lock_desc *, void *data,
 160                      __u32 data_len, int flag);
 161 int ll_size_lock(struct inode *, struct lov_stripe_md *, __u64 start, int mode,
 162                  struct lustre_handle **);
 163 int ll_size_unlock(struct inode *, struct lov_stripe_md *, int mode,
 164                    struct lustre_handle *);
 165 int ll_file_size(struct inode *inode, struct lov_stripe_md *md);
 166
 167 /* rw.c */
 168 struct page *ll_getpage(struct inode *inode, unsigned long offset,
 169                         int create, int locked);
 170 void ll_truncate(struct inode *inode);
 171
 172 /* super.c */
 173 void ll_update_inode(struct inode *, struct mds_body *);
 174
 175 /* symlink.c */
 176 extern struct inode_operations ll_fast_symlink_inode_operations;
 177 extern struct inode_operations ll_symlink_inode_operations;
 178
 179 /* sysctl.c */
 180 void ll_sysctl_init(void);
 181 void ll_sysctl_clean(void);
 182
 183 #endif