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 #include <linux/rbtree.h>
  29 #include <linux/lustre_compat25.h>
  30 #include <linux/pagemap.h>
  31
  32 /* careful, this is easy to screw up */
  33 #define PAGE_CACHE_MAXBYTES ((__u64)(~0UL) << PAGE_CACHE_SHIFT)
  34
  35 extern kmem_cache_t *ll_file_data_slab;
  36 struct ll_file_data {
  37         struct obd_client_handle fd_mds_och;
  38         struct obd_client_handle fd_ost_och;
  39         __u32 fd_flags;
  40 };
  41
  42 struct lustre_intent_data {
  43         __u64 it_lock_handle[2];
  44         __u32 it_disposition;
  45         __u32 it_status;
  46         __u32 it_lock_mode;
  47 };
  48
  49 struct ll_dentry_data {
  50         struct semaphore      lld_it_sem;
  51 };
  52
  53 #define ll_d2d(dentry) ((struct ll_dentry_data*) dentry->d_fsdata)
  54
  55 struct ll_dirty_offsets {
  56         rb_root_t       do_root;
  57         spinlock_t      do_lock;
  58         unsigned long   do_num_dirty;
  59 };
  60
  61 void ll_lldo_init(struct ll_dirty_offsets *lldo);
  62 void ll_record_dirty(struct inode *inode, unsigned long offset);
  63 void ll_remove_dirty(struct inode *inode, unsigned long start,
  64                      unsigned long end);
  65 int ll_find_dirty(struct ll_dirty_offsets *lldo, unsigned long *start,
  66                   unsigned long *end);
  67 int ll_farthest_dirty(struct ll_dirty_offsets *lldo, unsigned long *farthest);
  68 extern struct file_operations ll_pgcache_seq_fops;
  69
  70 struct ll_inode_info {
  71         struct lov_stripe_md   *lli_smd;
  72         char                   *lli_symlink_name;
  73         struct semaphore        lli_open_sem;
  74         struct list_head        lli_read_extents;
  75         loff_t                  lli_maxbytes;
  76         spinlock_t              lli_read_extent_lock;
  77         struct ll_dirty_offsets lli_dirty;
  78         unsigned long           lli_flags;
  79 #define LLI_F_HAVE_SIZE_LOCK    0
  80
  81 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
  82         struct inode            lli_vfs_inode;
  83 #endif
  84 };
  85
  86 /*
  87  * this lets ll_file_read tell ll_readpages how far ahead it can read
  88  * and still be covered by ll_file_read's lock.  2.5 won't need this, but
  89  * we have the other problem of other readpage callers making sure that
  90  * they're covered by a lock..
  91  */
  92 struct ll_read_extent {
  93         struct list_head re_lli_item;
  94         struct task_struct *re_task;
  95         struct ldlm_extent re_extent;
  96 };
  97
  98 int ll_check_dirty( struct super_block *sb );
  99 int ll_batch_writepage( struct inode *inode, struct page *page );
 100
 101 struct file_io_stats {
 102         spinlock_t     fis_lock;
 103         __u64   fis_dirty_pages;
 104         __u64   fis_dirty_hits;
 105         __u64   fis_dirty_misses;
 106         __u64   fis_forced_pages;
 107         __u64   fis_writepage_pages;
 108         __u64   fis_wb_ok;
 109         __u64   fis_wb_fail;
 110         __u64   fis_wb_from_writepage;
 111         __u64   fis_wb_from_pressure;
 112 };
 113
 114 #define IO_STAT_ADD(FIS, STAT, VAL) do {        \
 115         struct file_io_stats *_fis_ = (FIS);    \
 116         spin_lock(&_fis_->fis_lock);            \
 117         _fis_->fis_##STAT += VAL;               \
 118         spin_unlock(&_fis_->fis_lock);          \
 119 } while (0)
 120
 121 #define INODE_IO_STAT_ADD(INODE, STAT, VAL)        \
 122         IO_STAT_ADD(&ll_i2sbi(INODE)->ll_iostats, STAT, VAL)
 123
 124 #define PAGE_IO_STAT_ADD(PAGE, STAT, VAL)               \
 125         INODE_IO_STAT_ADD((PAGE)->mapping, STAT, VAL)
 126
 127 /* interpet return codes from intent lookup */
 128 #define LL_LOOKUP_POSITIVE 1
 129 #define LL_LOOKUP_NEGATIVE 2
 130
 131 #define LL_SUPER_MAGIC 0x0BD00BD0
 132
 133 #define LL_COMMITCBD_STOPPING  0x1
 134 #define LL_COMMITCBD_STOPPED   0x2
 135 #define LL_COMMITCBD_RUNNING   0x4
 136
 137 #define LL_SBI_NOLCK   0x1
 138
 139 struct ll_sb_info {
 140         struct obd_uuid           ll_sb_uuid;
 141         struct lustre_handle      ll_mdc_conn;
 142         struct lustre_handle      ll_osc_conn;
 143         struct proc_dir_entry*    ll_proc_root;
 144         obd_id                    ll_rootino; /* number of root inode */
 145
 146         int                       ll_flags;
 147         wait_queue_head_t         ll_commitcbd_waitq;
 148         wait_queue_head_t         ll_commitcbd_ctl_waitq;
 149         int                       ll_commitcbd_flags;
 150         struct task_struct       *ll_commitcbd_thread;
 151         time_t                    ll_commitcbd_waketime;
 152         time_t                    ll_commitcbd_timeout;
 153         spinlock_t                ll_commitcbd_lock;
 154         struct list_head          ll_conn_chain; /* per-conn chain of SBs */
 155
 156         struct list_head          ll_orphan_dentry_list; /*please don't ask -p*/
 157
 158         struct  file_io_stats     ll_iostats;
 159 };
 160
 161 static inline struct ll_sb_info *ll_s2sbi(struct super_block *sb)
 162 {
 163 #if  (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
 164         return (struct ll_sb_info *)(sb->s_fs_info);
 165 #else
 166         return (struct ll_sb_info *)(sb->u.generic_sbp);
 167 #endif
 168 }
 169
 170 static inline struct lustre_handle *ll_s2obdconn(struct super_block *sb)
 171 {
 172         return &(ll_s2sbi(sb))->ll_osc_conn;
 173 }
 174
 175 static inline struct client_obd *sbi2mdc(struct ll_sb_info *sbi)
 176 {
 177         struct obd_device *obd = class_conn2obd(&sbi->ll_mdc_conn);
 178         if (obd == NULL)
 179                 LBUG();
 180         return &obd->u.cli;
 181 }
 182
 183 // FIXME: replace the name of this with LL_SB to conform to kernel stuff
 184 static inline struct ll_sb_info *ll_i2sbi(struct inode *inode)
 185 {
 186         return ll_s2sbi(inode->i_sb);
 187 }
 188
 189 static inline void d_unhash_aliases(struct inode *inode)
 190 {
 191         struct dentry *dentry = NULL;
 192         struct list_head *tmp;
 193         struct ll_sb_info *sbi = ll_i2sbi(inode);
 194         ENTRY;
 195
 196         CDEBUG(D_INODE, "marking dentries for ino %lx/%x invalid\n",
 197                inode->i_ino, inode->i_generation);
 198
 199         spin_lock(&dcache_lock);
 200         list_for_each(tmp, &inode->i_dentry) {
 201                 dentry = list_entry(tmp, struct dentry, d_alias);
 202
 203                 list_del_init(&dentry->d_hash);
 204                 dentry->d_flags |= DCACHE_LUSTRE_INVALID;
 205                 list_add(&dentry->d_hash, &sbi->ll_orphan_dentry_list);
 206         }
 207
 208         spin_unlock(&dcache_lock);
 209         EXIT;
 210 }
 211
 212 // FIXME: replace the name of this with LL_I to conform to kernel stuff
 213 // static inline struct ll_inode_info *LL_I(struct inode *inode)
 214 static inline struct ll_inode_info *ll_i2info(struct inode *inode)
 215 {
 216 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
 217         return container_of(inode, struct ll_inode_info, lli_vfs_inode);
 218 #else
 219         return (struct ll_inode_info *)&(inode->u.generic_ip);
 220 #endif
 221 }
 222
 223 static inline struct lustre_handle *ll_i2obdconn(struct inode *inode)
 224 {
 225         return ll_s2obdconn(inode->i_sb);
 226 }
 227
 228 static inline void ll_ino2fid(struct ll_fid *fid, obd_id ino, __u32 generation,
 229                               int type);
 230
 231 static inline void ll_inode2fid(struct ll_fid *fid, struct inode *inode)
 232 {
 233         ll_ino2fid(fid, inode->i_ino, inode->i_generation,
 234                    inode->i_mode & S_IFMT);
 235 }
 236
 237 static inline int ll_mds_max_easize(struct super_block *sb)
 238 {
 239         return sbi2mdc(ll_s2sbi(sb))->cl_max_mds_easize;
 240 }
 241
 242 static inline loff_t ll_file_maxbytes(struct inode *inode)
 243 {
 244         return ll_i2info(inode)->lli_maxbytes;
 245 }
 246
 247 /* namei.c */
 248 int ll_lock(struct inode *dir, struct dentry *dentry,
 249             struct lookup_intent *it, struct lustre_handle *lockh);
 250 int ll_unlock(__u32 mode, struct lustre_handle *lockh);
 251
 252 typedef int (*intent_finish_cb)(int flag, struct ptlrpc_request *,
 253                                 struct inode *parent, struct dentry **,
 254                                 struct lookup_intent *, int offset, obd_id ino);
 255 int ll_intent_lock(struct inode *parent, struct dentry **,
 256                    struct lookup_intent *, intent_finish_cb);
 257 int ll_mdc_blocking_ast(struct ldlm_lock *lock,
 258                         struct ldlm_lock_desc *desc,
 259                         void *data, int flag);
 260 void ll_mdc_lock_set_inode(struct lustre_handle *lock, struct inode *inode);
 261 void ll_prepare_mdc_op_data(struct mdc_op_data *data,
 262                             struct inode *i1, struct inode *i2,
 263                             const char *name, int namelen, int mode);
 264
 265 /* dcache.c */
 266 void ll_intent_release(struct dentry *, struct lookup_intent *);
 267
 268 /****
 269
 270 I originally implmented these as functions, then realized a macro
 271 would be more helpful for debugging, so the CDEBUG messages show
 272 the current calling function.  The orignal functions are in llite/dcache.c
 273
 274 int ll_save_intent(struct dentry * de, struct lookup_intent * it);
 275 struct lookup_intent * ll_get_intent(struct dentry * de);
 276 ****/
 277
 278 #define IT_RELEASED_MAGIC 0xDEADCAFE
 279
 280 #define LL_SAVE_INTENT(de, it)                                                 \
 281 do {                                                                           \
 282         LASSERT(ll_d2d(de) != NULL);                                           \
 283                                                                                \
 284         down(&ll_d2d(de)->lld_it_sem);                                         \
 285         LASSERT(de->d_it == NULL);                                             \
 286         de->d_it = it;                                                         \
 287         CDEBUG(D_DENTRY, "D_IT DOWN dentry %p fsdata %p intent: %s sem %d\n",  \
 288                de, ll_d2d(de), ldlm_it2str(de->d_it->it_op),                   \
 289                atomic_read(&(ll_d2d(de)->lld_it_sem.count)));                  \
 290 } while(0)
 291
 292 #define LL_GET_INTENT(de, it)                                                  \
 293 do {                                                                           \
 294         it = de->d_it;                                                         \
 295                                                                                \
 296         LASSERT(ll_d2d(de) != NULL);                                           \
 297         LASSERT(it);                                                           \
 298         LASSERT(it->it_op != IT_RELEASED_MAGIC);                               \
 299                                                                                \
 300         CDEBUG(D_DENTRY, "D_IT UP dentry %p fsdata %p intent: %s\n",           \
 301                de, ll_d2d(de), ldlm_it2str(de->d_it->it_op));                  \
 302         de->d_it = NULL;                                                       \
 303         it->it_op = IT_RELEASED_MAGIC;                                         \
 304         up(&ll_d2d(de)->lld_it_sem);                                           \
 305 } while(0)
 306
 307 #define LL_IT2STR(it) ((it) ? ldlm_it2str((it)->it_op) : "0")
 308
 309 /* dcache.c */
 310 int ll_have_md_lock(struct dentry *de);
 311
 312 /* dir.c */
 313 extern struct file_operations ll_dir_operations;
 314 extern struct inode_operations ll_dir_inode_operations;
 315
 316 /* file.c */
 317 extern struct file_operations ll_file_operations;
 318 extern struct inode_operations ll_file_inode_operations;
 319 extern struct inode_operations ll_special_inode_operations;
 320 struct ldlm_lock;
 321 int ll_lock_callback(struct ldlm_lock *, struct ldlm_lock_desc *, void *data,
 322                      int flag);
 323 int ll_extent_lock_no_validate(struct ll_file_data *fd, struct inode *inode,
 324                    struct lov_stripe_md *lsm, int mode,
 325                    struct ldlm_extent *extent, struct lustre_handle *lockh);
 326 int ll_extent_lock(struct ll_file_data *fd, struct inode *inode,
 327                    struct lov_stripe_md *lsm, int mode,
 328                    struct ldlm_extent *extent, struct lustre_handle *lockh);
 329 int ll_extent_unlock(struct ll_file_data *fd, struct inode *inode,
 330                      struct lov_stripe_md *lsm, int mode,
 331                      struct lustre_handle *lockh);
 332 int ll_create_objects(struct super_block *sb, obd_id id, uid_t uid,
 333                       gid_t gid, struct lov_stripe_md **lsmp);
 334 int ll_file_open(struct inode *inode, struct file *file);
 335 int ll_file_release(struct inode *inode, struct file *file);
 336
 337
 338 /* rw.c */
 339 struct page *ll_getpage(struct inode *inode, unsigned long offset,
 340                         int create, int locked);
 341 void ll_truncate(struct inode *inode);
 342
 343 /* super.c */
 344 void ll_update_inode(struct inode *, struct mds_body *, struct lov_stripe_md *);
 345 int ll_setattr_raw(struct inode *inode, struct iattr *attr);
 346
 347 /* symlink.c */
 348 extern struct inode_operations ll_fast_symlink_inode_operations;
 349 extern struct inode_operations ll_symlink_inode_operations;
 350
 351 /* sysctl.c */
 352 void ll_sysctl_init(void);
 353 void ll_sysctl_clean(void);
 354
 355 #else
 356 #include <linux/lustre_idl.h>
 357 #endif /* __KERNEL__ */
 358
 359 static inline void ll_ino2fid(struct ll_fid *fid,
 360                               obd_id ino,
 361                               __u32 generation,
 362                               int type)
 363 {
 364         fid->id = ino;
 365         fid->generation = generation;
 366         fid->f_type = type;
 367 }
 368
 369 struct ll_read_inode2_cookie {
 370         struct mds_body      *lic_body;
 371         struct lov_stripe_md *lic_lsm;
 372 };
 373
 374 #include <asm/types.h>
 375
 376 #define LL_IOC_GETFLAGS                 _IOR ('f', 151, long)
 377 #define LL_IOC_SETFLAGS                 _IOW ('f', 152, long)
 378 #define LL_IOC_CLRFLAGS                 _IOW ('f', 153, long)
 379 #define LL_IOC_LOV_SETSTRIPE            _IOW ('f', 154, long)
 380 #define LL_IOC_LOV_GETSTRIPE            _IOW ('f', 155, long)
 381
 382 #define O_LOV_DELAY_CREATE 0100000000  /* hopefully this does not conflict */
 383
 384 #define LL_FILE_IGNORE_LOCK             0x00000001
 385
 386 #endif