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/version.h>
  20
  21 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
  22 #include <asm/statfs.h>
  23 #endif
  24
  25 #include <linux/fs.h>
  26 #include <linux/dcache.h>
  27 #include <linux/jbd.h>
  28 #include <linux/ext3_fs.h>
  29 #include <linux/proc_fs.h>
  30
  31 #include <linux/obd_class.h>
  32 #include <linux/lustre_net.h>
  33 #include <linux/lustre_mds.h>
  34 #include <linux/lustre_ha.h>
  35
  36 #include <linux/rbtree.h>
  37 #include <linux/lustre_compat25.h>
  38 #include <linux/pagemap.h>
  39 #include <linux/namei.h>
  40
  41
  42 /* careful, this is easy to screw up */
  43 #define PAGE_CACHE_MAXBYTES ((__u64)(~0UL) << PAGE_CACHE_SHIFT)
  44
  45 #define LL_IT2STR(it) ((it) ? ldlm_it2str((it)->it_op) : "0")
  46
  47 static inline struct lookup_intent *ll_nd2it(struct nameidata *nd)
  48 {
  49 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
  50         return &nd->intent.open;
  51 #else
  52         return nd->intent;
  53 #endif
  54 }
  55
  56 struct ll_dentry_data {
  57         int                      lld_cwd_count;
  58         int                      lld_mnt_count;
  59         struct obd_client_handle lld_cwd_och;
  60         struct obd_client_handle lld_mnt_och;
  61 };
  62
  63 #define ll_d2d(de) ((struct ll_dentry_data*) de->d_fsdata)
  64
  65 extern struct file_operations ll_pgcache_seq_fops;
  66
  67 #define LLI_INODE_MAGIC                 0x111d0de5
  68 #define LLI_INODE_DEAD                  0xdeadd00d
  69 #define LLI_F_HAVE_OST_SIZE_LOCK        0
  70 #define LLI_F_HAVE_MDS_SIZE_LOCK        1
  71 #define LLI_F_PREFER_EXTENDED_SIZE      2
  72
  73 struct ll_inode_info {
  74         int                     lli_size_pid;
  75         int                     lli_inode_magic;
  76         struct lov_stripe_md   *lli_smd;
  77         struct mea             *lli_mea;
  78         struct lustre_id        lli_id;    /* full lustre_id */
  79         char                   *lli_symlink_name;
  80         struct semaphore        lli_open_sem;
  81         struct semaphore        lli_size_sem;
  82         __u64                   lli_maxbytes;
  83         __u64                   lli_io_epoch;
  84         unsigned long           lli_flags;
  85
  86         /* this lock protects s_d_w and p_w_ll */
  87         spinlock_t              lli_lock;
  88         int                     lli_send_done_writing;
  89
  90         int                     lli_snap_index;
  91
  92         struct list_head        lli_pending_write_llaps;
  93
  94         struct list_head        lli_close_item;
  95
  96         struct file_operations *ll_save_ifop;
  97         struct file_operations *ll_save_ffop;
  98         struct file_operations *ll_save_wfop;
  99         struct file_operations *ll_save_wrfop;
 100 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
 101         struct inode            lli_vfs_inode;
 102 #endif
 103         struct semaphore        lli_och_sem; /* Protects access to och pointers
 104                                                 and their usage counters */
 105         /* We need all three because every inode may be opened in different
 106            modes */
 107         struct obd_client_handle *lli_mds_read_och;
 108         __u64                   lli_open_fd_read_count;
 109         struct obd_client_handle *lli_mds_write_och;
 110         __u64                   lli_open_fd_write_count;
 111         struct obd_client_handle *lli_mds_exec_och;
 112         __u64                   lli_open_fd_exec_count;
 113         struct posix_acl       *lli_acl_access;
 114 };
 115
 116 // FIXME: replace the name of this with LL_I to conform to kernel stuff
 117 // static inline struct ll_inode_info *LL_I(struct inode *inode)
 118 static inline struct ll_inode_info *ll_i2info(struct inode *inode)
 119 {
 120 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
 121         return container_of(inode, struct ll_inode_info, lli_vfs_inode);
 122 #else
 123         return (struct ll_inode_info *)&(inode->u.generic_ip);
 124 #endif
 125 }
 126
 127 #define LLI_HAVE_FLSIZE(inode)  \
 128         test_bit(LLI_F_HAVE_MDS_SIZE_LOCK, &ll_i2info(inode)->lli_flags)
 129
 130 /* lprocfs.c */
 131 enum {
 132          LPROC_LL_DIRTY_HITS = 0,
 133          LPROC_LL_DIRTY_MISSES,
 134          LPROC_LL_WB_WRITEPAGE,
 135          LPROC_LL_WB_PRESSURE,
 136          LPROC_LL_WB_OK,
 137          LPROC_LL_WB_FAIL,
 138          LPROC_LL_READ_BYTES,
 139          LPROC_LL_WRITE_BYTES,
 140          LPROC_LL_BRW_READ,
 141          LPROC_LL_BRW_WRITE,
 142          LPROC_LL_IOCTL,
 143          LPROC_LL_OPEN,
 144          LPROC_LL_RELEASE,
 145          LPROC_LL_MAP,
 146          LPROC_LL_LLSEEK,
 147          LPROC_LL_FSYNC,
 148          LPROC_LL_SETATTR,
 149          LPROC_LL_TRUNC,
 150
 151 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
 152          LPROC_LL_GETATTR,
 153 #else
 154          LPROC_LL_REVALIDATE,
 155 #endif
 156          LPROC_LL_STAFS,
 157          LPROC_LL_ALLOC_INODE,
 158
 159          LPROC_LL_DIRECT_READ,
 160          LPROC_LL_DIRECT_WRITE,
 161          LPROC_LL_SETXATTR,
 162          LPROC_LL_GETXATTR,
 163          LPROC_LL_FILE_OPCODES,
 164 };
 165
 166 struct lustre_intent_data {
 167         int     it_disposition;
 168         int     it_status;
 169         __u64   it_lock_handle;
 170         void    *it_data;
 171         int     it_lock_mode;
 172 };
 173 #define LUSTRE_IT(it) ((struct lustre_intent_data *)((it)->d.fs_data))
 174
 175 #else
 176 #include <linux/lustre_idl.h>
 177 #endif /* __KERNEL__ */
 178
 179 #define LLAP_FROM_COOKIE(c)                                                    \
 180         (LASSERT(((struct ll_async_page *)(c))->llap_magic == LLAP_MAGIC),     \
 181          (struct ll_async_page *)(c))
 182
 183 #include <lustre/lustre_user.h>
 184
 185 #endif