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
  29 extern kmem_cache_t *ll_file_data_slab;
  30 struct ll_file_data {
  31         struct lustre_handle fd_mdshandle;
  32         struct ptlrpc_request *fd_req;
  33         char fd_ostdata[FD_OSTDATA_SIZE];
  34         __u32 fd_flags;
  35 };
  36
  37 struct lustre_intent_data {
  38         __u64 it_lock_handle[2];
  39         __u32 it_disposition;
  40         __u32 it_status;
  41         __u32 it_lock_mode;
  42 };
  43
  44 struct ll_dentry_data {
  45         struct semaphore      lld_it_sem;
  46 };
  47
  48 #define ll_d2d(dentry) ((struct ll_dentry_data*) dentry->d_fsdata)
  49
  50 struct ll_read_inode2_cookie {
  51         struct mds_body *lic_body;
  52         struct lov_mds_md *lic_lmm;
  53 };
  54
  55 struct ll_inode_info {
  56         struct lov_stripe_md *lli_smd;
  57         char                 *lli_symlink_name;
  58         struct semaphore      lli_open_sem;
  59         atomic_t              lli_open_count; /* see ll_file_release */
  60         /*
  61          * the VALID flag and valid_sem are temporary measures to serialize
  62          * the manual getattrs that we're doing at lock acquisition.  in
  63          * the future the OST will always return its notion of the file
  64          * size with the granted locks.
  65          */
  66         unsigned long         lli_flags;
  67 #define LLI_F_DID_GETATTR      0
  68         struct semaphore      lli_getattr_sem;
  69         struct list_head      lli_read_extents;
  70         spinlock_t            lli_read_extent_lock;
  71
  72 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
  73         struct inode          lli_vfs_inode;
  74 #endif
  75 };
  76
  77 /*
  78  * this lets ll_file_read tell ll_readpages how far ahead it can read
  79  * and still be covered by ll_file_read's lock.  2.5 won't need this, but
  80  * we have the other problem of other readpage callers making sure that
  81  * they're covered by a lock..
  82  */
  83 struct ll_read_extent {
  84         struct list_head re_lli_item;
  85         struct task_struct *re_task;
  86         struct ldlm_extent re_extent;
  87 };
  88
  89 int ll_check_dirty( struct super_block *sb );
  90 int ll_batch_writepage( struct inode *inode, struct page *page );
  91
  92 /* interpet return codes from intent lookup */
  93 #define LL_LOOKUP_POSITIVE 1
  94 #define LL_LOOKUP_NEGATIVE 2
  95
  96 #define LL_SUPER_MAGIC 0x0BD00BD0
  97
  98 #define LL_COMMITCBD_STOPPING  0x1
  99 #define LL_COMMITCBD_STOPPED   0x2
 100 #define LL_COMMITCBD_RUNNING   0x4
 101
 102 #define LL_SBI_NOLCK   0x1
 103
 104 struct ll_sb_info {
 105         struct obd_uuid           ll_sb_uuid;
 106         struct lustre_handle      ll_mdc_conn;
 107         struct lustre_handle      ll_osc_conn;
 108         struct proc_dir_entry*    ll_proc_root;
 109         obd_id                    ll_rootino; /* number of root inode */
 110
 111         int                       ll_flags;
 112         wait_queue_head_t         ll_commitcbd_waitq;
 113         wait_queue_head_t         ll_commitcbd_ctl_waitq;
 114         int                       ll_commitcbd_flags;
 115         struct task_struct       *ll_commitcbd_thread;
 116         time_t                    ll_commitcbd_waketime;
 117         time_t                    ll_commitcbd_timeout;
 118         spinlock_t                ll_commitcbd_lock;
 119         struct list_head          ll_conn_chain; /* per-conn chain of SBs */
 120
 121         struct list_head          ll_orphan_dentry_list; /*please don't ask -p*/
 122 };
 123
 124 static inline struct ll_sb_info *ll_s2sbi(struct super_block *sb)
 125 {
 126 #if  (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
 127         return (struct ll_sb_info *)(sb->s_fs_info);
 128 #else
 129         return (struct ll_sb_info *)(sb->u.generic_sbp);
 130 #endif
 131 }
 132
 133 static inline struct lustre_handle *ll_s2obdconn(struct super_block *sb)
 134 {
 135         return &(ll_s2sbi(sb))->ll_osc_conn;
 136 }
 137
 138 static inline struct client_obd *sbi2mdc(struct ll_sb_info *sbi)
 139 {
 140         struct obd_device *obd = class_conn2obd(&sbi->ll_mdc_conn);
 141         if (obd == NULL)
 142                 LBUG();
 143         return &obd->u.cli;
 144 }
 145
 146 // FIXME: replace the name of this with LL_SB to conform to kernel stuff
 147 static inline struct ll_sb_info *ll_i2sbi(struct inode *inode)
 148 {
 149         return ll_s2sbi(inode->i_sb);
 150 }
 151
 152 static inline void d_unhash_aliases(struct inode *inode)
 153 {
 154         struct dentry *dentry = NULL;
 155         struct list_head *tmp;
 156         struct ll_sb_info *sbi = ll_i2sbi(inode);
 157         ENTRY;
 158
 159         CDEBUG(D_INODE, "marking dentries for ino %lx/%x invalid\n",
 160                inode->i_ino, inode->i_generation);
 161
 162         spin_lock(&dcache_lock);
 163         list_for_each(tmp, &inode->i_dentry) {
 164                 dentry = list_entry(tmp, struct dentry, d_alias);
 165
 166                 list_del_init(&dentry->d_hash);
 167                 dentry->d_flags |= DCACHE_LUSTRE_INVALID;
 168                 list_add(&dentry->d_hash, &sbi->ll_orphan_dentry_list);
 169         }
 170
 171         spin_unlock(&dcache_lock);
 172         EXIT;
 173 }
 174
 175 // FIXME: replace the name of this with LL_I to conform to kernel stuff
 176 // static inline struct ll_inode_info *LL_I(struct inode *inode)
 177 static inline struct ll_inode_info *ll_i2info(struct inode *inode)
 178 {
 179 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
 180         return container_of(inode, struct ll_inode_info, lli_vfs_inode);
 181 #else
 182         return (struct ll_inode_info *)&(inode->u.generic_ip);
 183 #endif
 184 }
 185
 186 static inline struct lustre_handle *ll_i2obdconn(struct inode *inode)
 187 {
 188         return ll_s2obdconn(inode->i_sb);
 189 }
 190
 191 static inline void ll_ino2fid(struct ll_fid *fid, obd_id ino, __u32 generation,
 192                               int type)
 193 {
 194         fid->id = ino;
 195         fid->generation = generation;
 196         fid->f_type = type;
 197 }
 198
 199 static inline void ll_inode2fid(struct ll_fid *fid, struct inode *inode)
 200 {
 201         ll_ino2fid(fid, inode->i_ino, inode->i_generation,
 202                    inode->i_mode & S_IFMT);
 203 }
 204
 205 static inline int ll_mds_max_easize(struct super_block *sb)
 206 {
 207         return sbi2mdc(ll_s2sbi(sb))->cl_max_mds_easize;
 208 }
 209
 210 /* namei.c */
 211 int ll_lock(struct inode *dir, struct dentry *dentry,
 212             struct lookup_intent *it, struct lustre_handle *lockh);
 213 int ll_unlock(__u32 mode, struct lustre_handle *lockh);
 214
 215 typedef int (*intent_finish_cb)(int flag, struct ptlrpc_request *,
 216                                 struct dentry **, struct lookup_intent *,
 217                                 int offset, obd_id ino);
 218 int ll_intent_lock(struct inode *parent, struct dentry **,
 219                    struct lookup_intent *, intent_finish_cb);
 220
 221 /* dcache.c */
 222 void ll_intent_release(struct dentry *, struct lookup_intent *);
 223
 224 /****
 225
 226 I originally implmented these as functions, then realized a macro
 227 would be more helpful for debugging, so the CDEBUG messages show
 228 the current calling function.  The orignal functions are in llite/dcache.c
 229
 230 int ll_save_intent(struct dentry * de, struct lookup_intent * it);
 231 struct lookup_intent * ll_get_intent(struct dentry * de);
 232 ****/
 233
 234 #define IT_RELEASED_MAGIC 0xDEADCAFE
 235
 236 #define LL_SAVE_INTENT(de, it)                                                 \
 237 do {                                                                           \
 238         LASSERT(ll_d2d(de) != NULL);                                           \
 239                                                                                \
 240         down(&ll_d2d(de)->lld_it_sem);                                         \
 241         LASSERT(de->d_it == NULL);                                             \
 242         de->d_it = it;                                                         \
 243         CDEBUG(D_DENTRY, "D_IT DOWN dentry %p fsdata %p intent: %s sem %d\n",  \
 244                de, ll_d2d(de), ldlm_it2str(de->d_it->it_op),                   \
 245                atomic_read(&(ll_d2d(de)->lld_it_sem.count)));                  \
 246 } while(0)
 247
 248 #define LL_GET_INTENT(de, it)                                                  \
 249 do {                                                                           \
 250         it = de->d_it;                                                         \
 251                                                                                \
 252         LASSERT(ll_d2d(de) != NULL);                                           \
 253         LASSERT(it);                                                           \
 254         LASSERT(it->it_op != IT_RELEASED_MAGIC);                               \
 255                                                                                \
 256         CDEBUG(D_DENTRY, "D_IT UP dentry %p fsdata %p intent: %s\n",           \
 257                de, ll_d2d(de), ldlm_it2str(de->d_it->it_op));                  \
 258         de->d_it = NULL;                                                       \
 259         it->it_op = IT_RELEASED_MAGIC;                                         \
 260         up(&ll_d2d(de)->lld_it_sem);                                           \
 261 } while(0)
 262
 263 /* dcache.c */
 264 int ll_have_md_lock(struct dentry *de);
 265
 266 /* dir.c */
 267 extern struct file_operations ll_dir_operations;
 268 extern struct inode_operations ll_dir_inode_operations;
 269
 270 /* file.c */
 271 extern struct file_operations ll_file_operations;
 272 extern struct inode_operations ll_file_inode_operations;
 273 extern struct inode_operations ll_special_inode_operations;
 274 struct ldlm_lock;
 275 int ll_lock_callback(struct ldlm_lock *, struct ldlm_lock_desc *, void *data,
 276                      int flag);
 277 int ll_extent_lock_no_validate(struct ll_file_data *fd, struct inode *inode,
 278                    struct lov_stripe_md *lsm, int mode,
 279                    struct ldlm_extent *extent, struct lustre_handle *lockh);
 280 int ll_extent_lock(struct ll_file_data *fd, struct inode *inode,
 281                    struct lov_stripe_md *lsm, int mode,
 282                    struct ldlm_extent *extent, struct lustre_handle *lockh);
 283 int ll_extent_unlock(struct ll_file_data *fd, struct inode *inode,
 284                      struct lov_stripe_md *lsm, int mode,
 285                      struct lustre_handle *lockh);
 286 int ll_create_objects(struct super_block *sb, obd_id id, uid_t uid,
 287                       gid_t gid, struct lov_stripe_md **lsmp);
 288
 289 /* rw.c */
 290 struct page *ll_getpage(struct inode *inode, unsigned long offset,
 291                         int create, int locked);
 292 void ll_truncate(struct inode *inode);
 293
 294 /* super.c */
 295 void ll_update_inode(struct inode *, struct mds_body *, struct lov_mds_md *);
 296 int ll_setattr_raw(struct inode *inode, struct iattr *attr);
 297
 298 /* symlink.c */
 299 extern struct inode_operations ll_fast_symlink_inode_operations;
 300 extern struct inode_operations ll_symlink_inode_operations;
 301
 302 /* sysctl.c */
 303 void ll_sysctl_init(void);
 304 void ll_sysctl_clean(void);
 305
 306 #endif /* __KERNEL__ */
 307
 308 #include <asm/types.h>
 309
 310 #define LL_IOC_GETFLAGS                 _IOR ('f', 151, long)
 311 #define LL_IOC_SETFLAGS                 _IOW ('f', 152, long)
 312 #define LL_IOC_CLRFLAGS                 _IOW ('f', 153, long)
 313 #define LL_IOC_LOV_SETSTRIPE            _IOW ('f', 154, long)
 314 #define LL_IOC_LOV_GETSTRIPE            _IOW ('f', 155, long)
 315
 316 #define O_LOV_DELAY_CREATE 0100000000  /* hopefully this does not conflict */
 317
 318 #define LL_FILE_IGNORE_LOCK             0x00000001
 319
 320 #endif