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 struct ll_dentry_data {
  36         struct semaphore      lld_it_sem;
  37 };
  38
  39 #define ll_d2d(dentry) ((struct ll_dentry_data*) dentry->d_fsdata)
  40
  41 struct ll_read_inode2_cookie {
  42         struct mds_body *lic_body;
  43         struct lov_mds_md *lic_lmm;
  44 };
  45
  46 #define LL_INLINESZ      60
  47 struct ll_inode_info {
  48         struct lov_stripe_md *lli_smd;
  49         char                 *lli_symlink_name;
  50         struct lustre_handle  lli_intent_lock_handle;
  51         struct semaphore      lli_open_sem;
  52 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
  53         struct inode          lli_vfs_inode;
  54 #endif
  55 };
  56
  57 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
  58 static inline struct ll_inode_info *LL_I(struct inode *inode)
  59 {
  60         return container_of(inode, struct ll_inode_info, lli_vfs_inode);
  61 }
  62 #endif
  63
  64
  65 #define LL_SUPER_MAGIC 0x0BD00BD0
  66
  67 #define LL_COMMITCBD_STOPPING  0x1
  68 #define LL_COMMITCBD_STOPPED   0x2
  69 #define LL_COMMITCBD_RUNNING   0x4
  70
  71 #define LL_SBI_NOLCK   0x1
  72
  73 struct ll_sb_info {
  74         obd_uuid_t                ll_sb_uuid;
  75         struct lustre_handle      ll_mdc_conn;
  76         struct lustre_handle      ll_osc_conn;
  77         obd_id                    ll_rootino; /* number of root inode */
  78
  79         int                       ll_flags;
  80         wait_queue_head_t         ll_commitcbd_waitq;
  81         wait_queue_head_t         ll_commitcbd_ctl_waitq;
  82         int                       ll_commitcbd_flags;
  83         struct task_struct       *ll_commitcbd_thread;
  84         time_t                    ll_commitcbd_waketime;
  85         time_t                    ll_commitcbd_timeout;
  86         spinlock_t                ll_commitcbd_lock;
  87         struct list_head          ll_conn_chain; /* per-conn chain of SBs */
  88 };
  89
  90 static inline struct ll_sb_info *ll_s2sbi(struct super_block *sb)
  91 {
  92 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
  93         return (struct ll_sb_info *)(sb->s_fs_info);
  94 #else
  95         return (struct ll_sb_info *)(sb->u.generic_sbp);
  96 #endif
  97 }
  98
  99 static inline struct lustre_handle *ll_s2obdconn(struct super_block *sb)
 100 {
 101         return &(ll_s2sbi(sb))->ll_osc_conn;
 102 }
 103
 104 static inline struct client_obd *sbi2mdc(struct ll_sb_info *sbi)
 105 {
 106         struct obd_device *obd = class_conn2obd(&sbi->ll_mdc_conn);
 107         if (obd == NULL)
 108                 LBUG();
 109         return &obd->u.cli;
 110 }
 111
 112 static inline struct ll_sb_info *ll_i2sbi(struct inode *inode)
 113 {
 114         return ll_s2sbi(inode->i_sb);
 115 }
 116
 117 static inline struct ll_inode_info *ll_i2info(struct inode *inode)
 118 {
 119         return (struct ll_inode_info *)&(inode->u.generic_ip);
 120 }
 121
 122 static inline struct lustre_handle *ll_i2obdconn(struct inode *inode)
 123 {
 124         return ll_s2obdconn(inode->i_sb);
 125 }
 126
 127 static inline void ll_ino2fid(struct ll_fid *fid, obd_id ino, __u32 generation,
 128                               int type)
 129 {
 130         fid->id = ino;
 131         fid->generation = generation;
 132         fid->f_type = type;
 133 }
 134
 135 static inline void ll_inode2fid(struct ll_fid *fid, struct inode *inode)
 136 {
 137         ll_ino2fid(fid, inode->i_ino, inode->i_generation,
 138                    inode->i_mode & S_IFMT);
 139 }
 140
 141 static inline int ll_mds_easize(struct super_block *sb)
 142 {
 143         return sbi2mdc(ll_s2sbi(sb))->cl_max_mds_easize;
 144 }
 145
 146 static inline int ll_ost_easize(struct super_block *sb)
 147 {
 148         return sbi2mdc(ll_s2sbi(sb))->cl_max_ost_easize;
 149 }
 150
 151 /* namei.c */
 152 int ll_lock(struct inode *dir, struct dentry *dentry,
 153             struct lookup_intent *it, struct lustre_handle *lockh);
 154 int ll_unlock(__u32 mode, struct lustre_handle *lockh);
 155
 156 typedef int (*intent_finish_cb)(int flag, struct ptlrpc_request *,
 157                                 struct dentry **, struct lookup_intent *,
 158                                 int offset, obd_id ino);
 159 int ll_intent_lock(struct inode *parent, struct dentry **,
 160                    struct lookup_intent *, intent_finish_cb);
 161
 162 /* dcache.c */
 163 void ll_intent_release(struct dentry *, struct lookup_intent *);
 164 int ll_set_dd(struct dentry *de);
 165
 166 /****
 167
 168 I originally implmented these as functions, then realized a macro
 169 would be more helpful for debugging, so the CDEBUG messages show
 170 the current calling function.  The orignal functions are in llite/dcache.c
 171
 172 int ll_save_intent(struct dentry * de, struct lookup_intent * it);
 173 struct lookup_intent * ll_get_intent(struct dentry * de);
 174 ****/
 175
 176 #define IT_RELEASED_MAGIC 0xDEADCAFE
 177
 178 #define LL_SAVE_INTENT(de, it)                                                 \
 179 do {                                                                           \
 180         LASSERT(ll_d2d(de) != NULL);                                           \
 181                                                                                \
 182         down(&ll_d2d(de)->lld_it_sem);                                         \
 183         de->d_it = it;                                                         \
 184         CDEBUG(D_DENTRY, "D_IT DOWN dentry %p fsdata %p intent: %s sem %d\n",  \
 185                de, ll_d2d(de), ldlm_it2str(de->d_it->it_op),                   \
 186                atomic_read(&(ll_d2d(de)->lld_it_sem.count)));                  \
 187 } while(0)
 188
 189 #define LL_GET_INTENT(de, it)                                                  \
 190 do {                                                                           \
 191         it = de->d_it;                                                         \
 192                                                                                \
 193         LASSERT(ll_d2d(de) != NULL);                                           \
 194         LASSERT(it->it_op != IT_RELEASED_MAGIC);                               \
 195                                                                                \
 196         CDEBUG(D_DENTRY, "D_IT UP dentry %p fsdata %p intent: %s\n",           \
 197                de, ll_d2d(de), ldlm_it2str(de->d_it->it_op));                  \
 198         de->d_it = NULL;                                                       \
 199         it->it_op = IT_RELEASED_MAGIC;                                         \
 200         up(&ll_d2d(de)->lld_it_sem);                                           \
 201 } while(0)
 202
 203 /* dir.c */
 204 extern struct file_operations ll_dir_operations;
 205 extern struct inode_operations ll_dir_inode_operations;
 206
 207 /* file.c */
 208 extern struct file_operations ll_file_operations;
 209 extern struct inode_operations ll_file_inode_operations;
 210 struct ldlm_lock;
 211 int ll_lock_callback(struct ldlm_lock *, struct ldlm_lock_desc *, void *data,
 212                      __u32 data_len, int flag);
 213 int ll_size_lock(struct inode *, struct lov_stripe_md *, obd_off start,
 214                  int mode, struct lustre_handle **);
 215 int ll_size_unlock(struct inode *, struct lov_stripe_md *, int mode,
 216                    struct lustre_handle *);
 217 int ll_file_size(struct inode *inode, struct lov_stripe_md *md);
 218 int ll_create_objects(struct super_block *sb, obd_id id, uid_t uid,
 219                       gid_t gid, struct lov_stripe_md **lsmp);
 220
 221 /* rw.c */
 222 struct page *ll_getpage(struct inode *inode, unsigned long offset,
 223                         int create, int locked);
 224 void ll_truncate(struct inode *inode);
 225
 226 /* super.c */
 227 void ll_update_inode(struct inode *, struct mds_body *);
 228
 229 /* symlink.c */
 230 extern struct inode_operations ll_fast_symlink_inode_operations;
 231 extern struct inode_operations ll_symlink_inode_operations;
 232
 233 /* sysctl.c */
 234 void ll_sysctl_init(void);
 235 void ll_sysctl_clean(void);
 236
 237 #endif /* __KERNEL__ */
 238
 239 #include <asm/types.h>
 240
 241 #define LL_IOC_GETFLAGS                 _IOR ('f', 151, long)
 242 #define LL_IOC_SETFLAGS                 _IOW ('f', 152, long)
 243 #define LL_IOC_CLRFLAGS                 _IOW ('f', 153, long)
 244 #define LL_IOC_LOV_SETSTRIPE            _IOW ('f', 154, long)
 245
 246 struct lov_user_md {
 247         __u64 lum_stripe_size;
 248         __u32 lum_stripe_pattern;
 249         __u32 lum_stripe_offset;
 250         __u32 lum_stripe_count;
 251 };
 252
 253 #define O_LOV_DELAY_CREATE 0100000000  /* hopefully this does not conflict */
 254
 255 #define LL_FILE_IGNORE_LOCK             0x00000001
 256
 257 #endif