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 semaphore      lli_open_sem;
  59         atomic_t              lli_open_count; /* see ll_file_release */
  60 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
  61         struct inode          lli_vfs_inode;
  62 #endif
  63 };
  64
  65 /* interpet return codes from intent lookup */
  66 #define LL_LOOKUP_POSITIVE 1
  67 #define LL_LOOKUP_NEGATIVE 2
  68
  69 #define LL_SUPER_MAGIC 0x0BD00BD0
  70
  71 #define LL_COMMITCBD_STOPPING  0x1
  72 #define LL_COMMITCBD_STOPPED   0x2
  73 #define LL_COMMITCBD_RUNNING   0x4
  74
  75 #define LL_SBI_NOLCK   0x1
  76
  77 struct ll_sb_info {
  78         struct obd_uuid           ll_sb_uuid;
  79         struct lustre_handle      ll_mdc_conn;
  80         struct lustre_handle      ll_osc_conn;
  81         struct proc_dir_entry*    ll_proc_root;
  82         obd_id                    ll_rootino; /* number of root inode */
  83
  84         int                       ll_flags;
  85         wait_queue_head_t         ll_commitcbd_waitq;
  86         wait_queue_head_t         ll_commitcbd_ctl_waitq;
  87         int                       ll_commitcbd_flags;
  88         struct task_struct       *ll_commitcbd_thread;
  89         time_t                    ll_commitcbd_waketime;
  90         time_t                    ll_commitcbd_timeout;
  91         spinlock_t                ll_commitcbd_lock;
  92         struct list_head          ll_conn_chain; /* per-conn chain of SBs */
  93
  94         struct list_head          ll_orphan_dentry_list; /*please don't ask -p*/
  95 };
  96
  97 static inline struct ll_sb_info *ll_s2sbi(struct super_block *sb)
  98 {
  99 #if  (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
 100         return (struct ll_sb_info *)(sb->s_fs_info);
 101 #else
 102         return (struct ll_sb_info *)(sb->u.generic_sbp);
 103 #endif
 104 }
 105
 106 static inline struct lustre_handle *ll_s2obdconn(struct super_block *sb)
 107 {
 108         return &(ll_s2sbi(sb))->ll_osc_conn;
 109 }
 110
 111 static inline struct client_obd *sbi2mdc(struct ll_sb_info *sbi)
 112 {
 113         struct obd_device *obd = class_conn2obd(&sbi->ll_mdc_conn);
 114         if (obd == NULL)
 115                 LBUG();
 116         return &obd->u.cli;
 117 }
 118
 119 // FIXME: replace the name of this with LL_SB to conform to kernel stuff
 120 static inline struct ll_sb_info *ll_i2sbi(struct inode *inode)
 121 {
 122         return ll_s2sbi(inode->i_sb);
 123 }
 124
 125 static inline void d_unhash_aliases(struct inode *inode)
 126 {
 127         struct dentry *dentry = NULL;
 128         struct list_head *tmp;
 129         struct ll_sb_info *sbi = ll_i2sbi(inode);
 130         ENTRY;
 131
 132         CDEBUG(D_INODE, "marking dentries for ino %lx/%x invalid\n",
 133                inode->i_ino, inode->i_generation);
 134
 135         spin_lock(&dcache_lock);
 136         list_for_each(tmp, &inode->i_dentry) {
 137                 dentry = list_entry(tmp, struct dentry, d_alias);
 138
 139                 list_del_init(&dentry->d_hash);
 140                 dentry->d_flags |= DCACHE_LUSTRE_INVALID;
 141                 list_add(&dentry->d_hash, &sbi->ll_orphan_dentry_list);
 142         }
 143
 144         spin_unlock(&dcache_lock);
 145         EXIT;
 146 }
 147
 148 // FIXME: replace the name of this with LL_I to conform to kernel stuff
 149 // static inline struct ll_inode_info *LL_I(struct inode *inode)
 150 static inline struct ll_inode_info *ll_i2info(struct inode *inode)
 151 {
 152 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
 153         return container_of(inode, struct ll_inode_info, lli_vfs_inode);
 154 #else
 155         return (struct ll_inode_info *)&(inode->u.generic_ip);
 156 #endif
 157 }
 158
 159 static inline struct lustre_handle *ll_i2obdconn(struct inode *inode)
 160 {
 161         return ll_s2obdconn(inode->i_sb);
 162 }
 163
 164 static inline void ll_ino2fid(struct ll_fid *fid, obd_id ino, __u32 generation,
 165                               int type)
 166 {
 167         fid->id = ino;
 168         fid->generation = generation;
 169         fid->f_type = type;
 170 }
 171
 172 static inline void ll_inode2fid(struct ll_fid *fid, struct inode *inode)
 173 {
 174         ll_ino2fid(fid, inode->i_ino, inode->i_generation,
 175                    inode->i_mode & S_IFMT);
 176 }
 177
 178 static inline int ll_mds_max_easize(struct super_block *sb)
 179 {
 180         return sbi2mdc(ll_s2sbi(sb))->cl_max_mds_easize;
 181 }
 182
 183 /* namei.c */
 184 int ll_lock(struct inode *dir, struct dentry *dentry,
 185             struct lookup_intent *it, struct lustre_handle *lockh);
 186 int ll_unlock(__u32 mode, struct lustre_handle *lockh);
 187
 188 typedef int (*intent_finish_cb)(int flag, struct ptlrpc_request *,
 189                                 struct dentry **, struct lookup_intent *,
 190                                 int offset, obd_id ino);
 191 int ll_intent_lock(struct inode *parent, struct dentry **,
 192                    struct lookup_intent *, intent_finish_cb);
 193
 194 /* dcache.c */
 195 void ll_intent_release(struct dentry *, struct lookup_intent *);
 196
 197 /****
 198
 199 I originally implmented these as functions, then realized a macro
 200 would be more helpful for debugging, so the CDEBUG messages show
 201 the current calling function.  The orignal functions are in llite/dcache.c
 202
 203 int ll_save_intent(struct dentry * de, struct lookup_intent * it);
 204 struct lookup_intent * ll_get_intent(struct dentry * de);
 205 ****/
 206
 207 #define IT_RELEASED_MAGIC 0xDEADCAFE
 208
 209 #define LL_SAVE_INTENT(de, it)                                                 \
 210 do {                                                                           \
 211         LASSERT(ll_d2d(de) != NULL);                                           \
 212                                                                                \
 213         down(&ll_d2d(de)->lld_it_sem);                                         \
 214         LASSERT(de->d_it == NULL);                                             \
 215         de->d_it = it;                                                         \
 216         CDEBUG(D_DENTRY, "D_IT DOWN dentry %p fsdata %p intent: %s sem %d\n",  \
 217                de, ll_d2d(de), ldlm_it2str(de->d_it->it_op),                   \
 218                atomic_read(&(ll_d2d(de)->lld_it_sem.count)));                  \
 219 } while(0)
 220
 221 #define LL_GET_INTENT(de, it)                                                  \
 222 do {                                                                           \
 223         it = de->d_it;                                                         \
 224                                                                                \
 225         LASSERT(ll_d2d(de) != NULL);                                           \
 226         LASSERT(it);                                                           \
 227         LASSERT(it->it_op != IT_RELEASED_MAGIC);                               \
 228                                                                                \
 229         CDEBUG(D_DENTRY, "D_IT UP dentry %p fsdata %p intent: %s\n",           \
 230                de, ll_d2d(de), ldlm_it2str(de->d_it->it_op));                  \
 231         de->d_it = NULL;                                                       \
 232         it->it_op = IT_RELEASED_MAGIC;                                         \
 233         up(&ll_d2d(de)->lld_it_sem);                                           \
 234 } while(0)
 235
 236 /* dcache.c */
 237 int ll_have_md_lock(struct dentry *de);
 238
 239 /* dir.c */
 240 extern struct file_operations ll_dir_operations;
 241 extern struct inode_operations ll_dir_inode_operations;
 242
 243 /* file.c */
 244 extern struct file_operations ll_file_operations;
 245 extern struct inode_operations ll_file_inode_operations;
 246 extern struct inode_operations ll_special_inode_operations;
 247 struct ldlm_lock;
 248 int ll_lock_callback(struct ldlm_lock *, struct ldlm_lock_desc *, void *data, int flag);
 249 int ll_size_lock(struct inode *, struct lov_stripe_md *, obd_off start,
 250                  int mode, struct lustre_handle *);
 251 int ll_size_unlock(struct inode *, struct lov_stripe_md *, int mode,
 252                    struct lustre_handle *);
 253 int ll_file_size(struct inode *inode, struct lov_stripe_md *md,
 254                  struct lustre_handle *);
 255 int ll_create_objects(struct super_block *sb, obd_id id, uid_t uid,
 256                       gid_t gid, struct lov_stripe_md **lsmp);
 257
 258 /* rw.c */
 259 struct page *ll_getpage(struct inode *inode, unsigned long offset,
 260                         int create, int locked);
 261 void ll_truncate(struct inode *inode);
 262
 263 /* super.c */
 264 void ll_update_inode(struct inode *, struct mds_body *, struct lov_mds_md *);
 265
 266 /* symlink.c */
 267 extern struct inode_operations ll_fast_symlink_inode_operations;
 268 extern struct inode_operations ll_symlink_inode_operations;
 269
 270 /* sysctl.c */
 271 void ll_sysctl_init(void);
 272 void ll_sysctl_clean(void);
 273
 274 #endif /* __KERNEL__ */
 275
 276 #include <asm/types.h>
 277
 278 #define LL_IOC_GETFLAGS                 _IOR ('f', 151, long)
 279 #define LL_IOC_SETFLAGS                 _IOW ('f', 152, long)
 280 #define LL_IOC_CLRFLAGS                 _IOW ('f', 153, long)
 281 #define LL_IOC_LOV_SETSTRIPE            _IOW ('f', 154, long)
 282 #define LL_IOC_LOV_GETSTRIPE            _IOW ('f', 155, long)
 283
 284 #define O_LOV_DELAY_CREATE 0100000000  /* hopefully this does not conflict */
 285
 286 #define LL_FILE_IGNORE_LOCK             0x00000001
 287
 288 #endif