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 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
  60         struct inode          lli_vfs_inode;
  61 #endif
  62 };
  63
  64 /* interpet return codes from intent lookup */
  65 #define LL_LOOKUP_POSITIVE 1
  66 #define LL_LOOKUP_NEGATIVE 2
  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         struct obd_uuid           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 static inline void d_unhash_aliases(struct inode *inode)
 125 {
 126         struct dentry *dentry = NULL;
 127         struct list_head *tmp;
 128         struct ll_sb_info *sbi = ll_i2sbi(inode);
 129         ENTRY;
 130
 131         CDEBUG(D_INODE, "marking dentries for ino %lx/%x invalid\n",
 132                inode->i_ino, inode->i_generation);
 133
 134         spin_lock(&dcache_lock);
 135         list_for_each(tmp, &inode->i_dentry) {
 136                 dentry = list_entry(tmp, struct dentry, d_alias);
 137
 138                 list_del_init(&dentry->d_hash);
 139                 dentry->d_flags |= DCACHE_LUSTRE_INVALID;
 140                 list_add(&dentry->d_hash, &sbi->ll_orphan_dentry_list);
 141         }
 142
 143         spin_unlock(&dcache_lock);
 144         EXIT;
 145 }
 146
 147 // FIXME: replace the name of this with LL_I to conform to kernel stuff
 148 // static inline struct ll_inode_info *LL_I(struct inode *inode)
 149 static inline struct ll_inode_info *ll_i2info(struct inode *inode)
 150 {
 151 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
 152         return container_of(inode, struct ll_inode_info, lli_vfs_inode);
 153 #else
 154         return (struct ll_inode_info *)&(inode->u.generic_ip);
 155 #endif
 156 }
 157
 158 static inline struct lustre_handle *ll_i2obdconn(struct inode *inode)
 159 {
 160         return ll_s2obdconn(inode->i_sb);
 161 }
 162
 163 static inline void ll_ino2fid(struct ll_fid *fid, obd_id ino, __u32 generation,
 164                               int type)
 165 {
 166         fid->id = ino;
 167         fid->generation = generation;
 168         fid->f_type = type;
 169 }
 170
 171 static inline void ll_inode2fid(struct ll_fid *fid, struct inode *inode)
 172 {
 173         ll_ino2fid(fid, inode->i_ino, inode->i_generation,
 174                    inode->i_mode & S_IFMT);
 175 }
 176
 177 static inline int ll_mds_max_easize(struct super_block *sb)
 178 {
 179         return sbi2mdc(ll_s2sbi(sb))->cl_max_mds_easize;
 180 }
 181
 182 /* namei.c */
 183 int ll_lock(struct inode *dir, struct dentry *dentry,
 184             struct lookup_intent *it, struct lustre_handle *lockh);
 185 int ll_unlock(__u32 mode, struct lustre_handle *lockh);
 186
 187 typedef int (*intent_finish_cb)(int flag, struct ptlrpc_request *,
 188                                 struct dentry **, struct lookup_intent *,
 189                                 int offset, obd_id ino);
 190 int ll_intent_lock(struct inode *parent, struct dentry **,
 191                    struct lookup_intent *, intent_finish_cb);
 192
 193 /* dcache.c */
 194 void ll_intent_release(struct dentry *, struct lookup_intent *);
 195
 196 /****
 197
 198 I originally implmented these as functions, then realized a macro
 199 would be more helpful for debugging, so the CDEBUG messages show
 200 the current calling function.  The orignal functions are in llite/dcache.c
 201
 202 int ll_save_intent(struct dentry * de, struct lookup_intent * it);
 203 struct lookup_intent * ll_get_intent(struct dentry * de);
 204 ****/
 205
 206 #define IT_RELEASED_MAGIC 0xDEADCAFE
 207
 208 #define LL_SAVE_INTENT(de, it)                                                 \
 209 do {                                                                           \
 210         LASSERT(ll_d2d(de) != NULL);                                           \
 211                                                                                \
 212         down(&ll_d2d(de)->lld_it_sem);                                         \
 213         LASSERT(de->d_it == NULL);                                             \
 214         de->d_it = it;                                                         \
 215         CDEBUG(D_DENTRY, "D_IT DOWN dentry %p fsdata %p intent: %s sem %d\n",  \
 216                de, ll_d2d(de), ldlm_it2str(de->d_it->it_op),                   \
 217                atomic_read(&(ll_d2d(de)->lld_it_sem.count)));                  \
 218 } while(0)
 219
 220 #define LL_GET_INTENT(de, it)                                                  \
 221 do {                                                                           \
 222         it = de->d_it;                                                         \
 223                                                                                \
 224         LASSERT(ll_d2d(de) != NULL);                                           \
 225         LASSERT(it);                                                           \
 226         LASSERT(it->it_op != IT_RELEASED_MAGIC);                               \
 227                                                                                \
 228         CDEBUG(D_DENTRY, "D_IT UP dentry %p fsdata %p intent: %s\n",           \
 229                de, ll_d2d(de), ldlm_it2str(de->d_it->it_op));                  \
 230         de->d_it = NULL;                                                       \
 231         it->it_op = IT_RELEASED_MAGIC;                                         \
 232         up(&ll_d2d(de)->lld_it_sem);                                           \
 233 } while(0)
 234
 235 /* dcache.c */
 236 int ll_have_md_lock(struct dentry *de);
 237
 238 /* dir.c */
 239 extern struct file_operations ll_dir_operations;
 240 extern struct inode_operations ll_dir_inode_operations;
 241
 242 /* file.c */
 243 extern struct file_operations ll_file_operations;
 244 extern struct inode_operations ll_file_inode_operations;
 245 extern struct inode_operations ll_special_inode_operations;
 246 struct ldlm_lock;
 247 int ll_lock_callback(struct ldlm_lock *, struct ldlm_lock_desc *, void *data,
 248                      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, char *ostdata);
 254 int ll_create_objects(struct super_block *sb, obd_id id, uid_t uid,
 255                       gid_t gid, struct lov_stripe_md **lsmp);
 256
 257 /* rw.c */
 258 struct page *ll_getpage(struct inode *inode, unsigned long offset,
 259                         int create, int locked);
 260 void ll_truncate(struct inode *inode);
 261
 262 /* super.c */
 263 void ll_update_inode(struct inode *, struct mds_body *, struct lov_mds_md *);
 264 int ll_setattr_raw(struct inode *inode, struct iattr *attr);
 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