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 #include <linux/proc_fs.h>
  22
  23 #include <linux/obd_class.h>
  24 #include <linux/lustre_net.h>
  25 #include <linux/lustre_mds.h>
  26 #include <linux/lustre_ha.h>
  27
  28 extern kmem_cache_t *ll_file_data_slab;
  29 struct ll_file_data {
  30         struct lustre_handle fd_mdshandle;
  31         struct lustre_handle fd_osthandle;
  32         struct ptlrpc_request *fd_req;
  33         __u32 fd_flags;
  34 };
  35
  36 struct lustre_intent_data {
  37         __u64 it_lock_handle[2];
  38         __u32 it_disposition;
  39         __u32 it_status;
  40         __u32 it_lock_mode;
  41 };
  42
  43 struct ll_dentry_data {
  44         struct semaphore      lld_it_sem;
  45 };
  46
  47 #define ll_d2d(dentry) ((struct ll_dentry_data*) dentry->d_fsdata)
  48
  49 struct ll_read_inode2_cookie {
  50         struct mds_body *lic_body;
  51         struct lov_mds_md *lic_lmm;
  52 };
  53
  54 #define LL_INLINESZ      60
  55 struct ll_inode_info {
  56         struct lov_stripe_md *lli_smd;
  57         char                 *lli_symlink_name;
  58         struct lustre_handle  lli_intent_lock_handle;
  59         struct semaphore      lli_open_sem;
  60         atomic_t              lli_open_count; /* see ll_file_release */
  61 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
  62         struct inode          lli_vfs_inode;
  63 #endif
  64 };
  65
  66
  67
  68 #define LL_SUPER_MAGIC 0x0BD00BD0
  69
  70 #define LL_COMMITCBD_STOPPING  0x1
  71 #define LL_COMMITCBD_STOPPED   0x2
  72 #define LL_COMMITCBD_RUNNING   0x4
  73
  74 #define LL_SBI_NOLCK   0x1
  75
  76 struct ll_sb_info {
  77         obd_uuid_t                ll_sb_uuid;
  78         struct lustre_handle      ll_mdc_conn;
  79         struct lustre_handle      ll_osc_conn;
  80         struct proc_dir_entry*    ll_proc_root;
  81         obd_id                    ll_rootino; /* number of root inode */
  82
  83         int                       ll_flags;
  84         wait_queue_head_t         ll_commitcbd_waitq;
  85         wait_queue_head_t         ll_commitcbd_ctl_waitq;
  86         int                       ll_commitcbd_flags;
  87         struct task_struct       *ll_commitcbd_thread;
  88         time_t                    ll_commitcbd_waketime;
  89         time_t                    ll_commitcbd_timeout;
  90         spinlock_t                ll_commitcbd_lock;
  91         struct list_head          ll_conn_chain; /* per-conn chain of SBs */
  92
  93         struct list_head          ll_orphan_dentry_list; /*please don't ask -p*/
  94 };
  95
  96 static inline struct ll_sb_info *ll_s2sbi(struct super_block *sb)
  97 {
  98 #if  (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
  99         return (struct ll_sb_info *)(sb->s_fs_info);
 100 #else
 101         return (struct ll_sb_info *)(sb->u.generic_sbp);
 102 #endif
 103 }
 104
 105 static inline struct lustre_handle *ll_s2obdconn(struct super_block *sb)
 106 {
 107         return &(ll_s2sbi(sb))->ll_osc_conn;
 108 }
 109
 110 static inline struct client_obd *sbi2mdc(struct ll_sb_info *sbi)
 111 {
 112         struct obd_device *obd = class_conn2obd(&sbi->ll_mdc_conn);
 113         if (obd == NULL)
 114                 LBUG();
 115         return &obd->u.cli;
 116 }
 117
 118 // FIXME: replace the name of this with LL_SB to conform to kernel stuff
 119 static inline struct ll_sb_info *ll_i2sbi(struct inode *inode)
 120 {
 121         return ll_s2sbi(inode->i_sb);
 122 }
 123
 124
 125 // FIXME: replace the name of this with LL_I to conform to kernel stuff
 126 // static inline struct ll_inode_info *LL_I(struct inode *inode)
 127 static inline struct ll_inode_info *ll_i2info(struct inode *inode)
 128 {
 129 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
 130         return container_of(inode, struct ll_inode_info, lli_vfs_inode);
 131 #else
 132         return (struct ll_inode_info *)&(inode->u.generic_ip);
 133 #endif
 134 }
 135
 136 static inline struct lustre_handle *ll_i2obdconn(struct inode *inode)
 137 {
 138         return ll_s2obdconn(inode->i_sb);
 139 }
 140
 141 static inline void ll_ino2fid(struct ll_fid *fid, obd_id ino, __u32 generation,
 142                               int type)
 143 {
 144         fid->id = ino;
 145         fid->generation = generation;
 146         fid->f_type = type;
 147 }
 148
 149 static inline void ll_inode2fid(struct ll_fid *fid, struct inode *inode)
 150 {
 151         ll_ino2fid(fid, inode->i_ino, inode->i_generation,
 152                    inode->i_mode & S_IFMT);
 153 }
 154
 155 static inline int ll_mds_max_easize(struct super_block *sb)
 156 {
 157         return sbi2mdc(ll_s2sbi(sb))->cl_max_mds_easize;
 158 }
 159
 160 /* namei.c */
 161 int ll_lock(struct inode *dir, struct dentry *dentry,
 162             struct lookup_intent *it, struct lustre_handle *lockh);
 163 int ll_unlock(__u32 mode, struct lustre_handle *lockh);
 164
 165 typedef int (*intent_finish_cb)(int flag, struct ptlrpc_request *,
 166                                 struct dentry **, struct lookup_intent *,
 167                                 int offset, obd_id ino);
 168 int ll_intent_lock(struct inode *parent, struct dentry **,
 169                    struct lookup_intent *, intent_finish_cb);
 170
 171 /* dcache.c */
 172 void ll_intent_release(struct dentry *, struct lookup_intent *);
 173 int ll_set_dd(struct dentry *de);
 174
 175 /****
 176
 177 I originally implmented these as functions, then realized a macro
 178 would be more helpful for debugging, so the CDEBUG messages show
 179 the current calling function.  The orignal functions are in llite/dcache.c
 180
 181 int ll_save_intent(struct dentry * de, struct lookup_intent * it);
 182 struct lookup_intent * ll_get_intent(struct dentry * de);
 183 ****/
 184
 185 #define IT_RELEASED_MAGIC 0xDEADCAFE
 186
 187 #define LL_SAVE_INTENT(de, it)                                                 \
 188 do {                                                                           \
 189         LASSERT(ll_d2d(de) != NULL);                                           \
 190                                                                                \
 191         down(&ll_d2d(de)->lld_it_sem);                                         \
 192         LASSERT(de->d_it == NULL);                               \
 193         de->d_it = it;                                                         \
 194         CDEBUG(D_DENTRY, "D_IT DOWN dentry %p fsdata %p intent: %s sem %d\n",  \
 195                de, ll_d2d(de), ldlm_it2str(de->d_it->it_op),                   \
 196                atomic_read(&(ll_d2d(de)->lld_it_sem.count)));                  \
 197 } while(0)
 198
 199 #define LL_GET_INTENT(de, it)                                                  \
 200 do {                                                                           \
 201         it = de->d_it;                                                         \
 202                                                                                \
 203         LASSERT(ll_d2d(de) != NULL);                                           \
 204         LASSERT(it);                                                           \
 205         LASSERT(it->it_op != IT_RELEASED_MAGIC);                               \
 206                                                                                \
 207         CDEBUG(D_DENTRY, "D_IT UP dentry %p fsdata %p intent: %s\n",           \
 208                de, ll_d2d(de), ldlm_it2str(de->d_it->it_op));                  \
 209         de->d_it = NULL;                                                       \
 210         it->it_op = IT_RELEASED_MAGIC;                                         \
 211         up(&ll_d2d(de)->lld_it_sem);                                           \
 212 } while(0)
 213
 214 /* dir.c */
 215 extern struct file_operations ll_dir_operations;
 216 extern struct inode_operations ll_dir_inode_operations;
 217
 218 /* file.c */
 219 extern struct file_operations ll_file_operations;
 220 extern struct inode_operations ll_file_inode_operations;
 221 struct ldlm_lock;
 222 int ll_lock_callback(struct ldlm_lock *, struct ldlm_lock_desc *, void *data,
 223                      __u32 data_len, int flag);
 224 int ll_size_lock(struct inode *, struct lov_stripe_md *, obd_off start,
 225                  int mode, struct lustre_handle **);
 226 int ll_size_unlock(struct inode *, struct lov_stripe_md *, int mode,
 227                    struct lustre_handle *);
 228 int ll_file_size(struct inode *inode, struct lov_stripe_md *md);
 229 int ll_create_objects(struct super_block *sb, obd_id id, uid_t uid,
 230                       gid_t gid, struct lov_stripe_md **lsmp);
 231
 232 /* rw.c */
 233 struct page *ll_getpage(struct inode *inode, unsigned long offset,
 234                         int create, int locked);
 235 void ll_truncate(struct inode *inode);
 236
 237 /* super.c */
 238 void ll_update_inode(struct inode *, struct mds_body *);
 239
 240 /* symlink.c */
 241 extern struct inode_operations ll_fast_symlink_inode_operations;
 242 extern struct inode_operations ll_symlink_inode_operations;
 243
 244 /* sysctl.c */
 245 void ll_sysctl_init(void);
 246 void ll_sysctl_clean(void);
 247
 248 #endif /* __KERNEL__ */
 249
 250 #include <asm/types.h>
 251
 252 #define LL_IOC_GETFLAGS                 _IOR ('f', 151, long)
 253 #define LL_IOC_SETFLAGS                 _IOW ('f', 152, long)
 254 #define LL_IOC_CLRFLAGS                 _IOW ('f', 153, long)
 255 #define LL_IOC_LOV_SETSTRIPE            _IOW ('f', 154, long)
 256 #define LL_IOC_LOV_GETSTRIPE            _IOW ('f', 155, long)
 257
 258 #define O_LOV_DELAY_CREATE 0100000000  /* hopefully this does not conflict */
 259
 260 #define LL_FILE_IGNORE_LOCK             0x00000001
 261
 262 #endif