include/linux/nfs_fs_i.h

   1 #ifndef _NFS_FS_I
   2 #define _NFS_FS_I
   3
   4 #include <asm/types.h>
   5 #include <linux/list.h>
   6 #include <linux/nfs.h>
   7
   8 /*
   9  * nfs fs inode data in memory
  10  */
  11 struct nfs_inode_info {
  12         /*
  13          * The 64bit 'inode number'
  14          */
  15         __u64 fsid;
  16         __u64 fileid;
  17
  18         /*
  19          * NFS file handle
  20          */
  21         struct nfs_fh           fh;
  22
  23         /*
  24          * Various flags
  25          */
  26         unsigned short          flags;
  27
  28         /*
  29          * read_cache_jiffies is when we started read-caching this inode,
  30          * and read_cache_mtime is the mtime of the inode at that time.
  31          * attrtimeo is for how long the cached information is assumed
  32          * to be valid. A successful attribute revalidation doubles
  33          * attrtimeo (up to acregmax/acdirmax), a failure resets it to
  34          * acregmin/acdirmin.
  35          *
  36          * We need to revalidate the cached attrs for this inode if
  37          *
  38          *      jiffies - read_cache_jiffies > attrtimeo
  39          *
  40          * and invalidate any cached data/flush out any dirty pages if
  41          * we find that
  42          *
  43          *      mtime != read_cache_mtime
  44          */
  45         unsigned long           read_cache_jiffies;
  46         __u64                   read_cache_ctime;
  47         __u64                   read_cache_mtime;
  48         __u64                   read_cache_atime;
  49         __u64                   read_cache_isize;
  50         unsigned long           attrtimeo;
  51         unsigned long           attrtimeo_timestamp;
  52
  53         /*
  54          * This is the cookie verifier used for NFSv3 readdir
  55          * operations
  56          */
  57         __u32                   cookieverf[2];
  58
  59         /*
  60          * This is the list of dirty unwritten pages.
  61          */
  62         struct list_head        read;
  63         struct list_head        dirty;
  64         struct list_head        commit;
  65         struct list_head        writeback;
  66
  67         unsigned int            nread,
  68                                 ndirty,
  69                                 ncommit,
  70                                 npages;
  71
  72         /* Flush daemon info */
  73         struct inode            *hash_next,
  74                                 *hash_prev;
  75         unsigned long           nextscan;
  76 };
  77
  78 /*
  79  * Legal inode flag values
  80  */
  81 #define NFS_INO_STALE           0x0001          /* possible stale inode */
  82 #define NFS_INO_ADVISE_RDPLUS   0x0002          /* advise readdirplus */
  83 #define NFS_INO_REVALIDATING    0x0004          /* revalidating attrs */
  84 #define NFS_IS_SNAPSHOT         0x0010          /* a snapshot file */
  85 #define NFS_INO_FLUSH           0x0020          /* inode is due for flushing */
  86
  87 /*
  88  * NFS lock info
  89  */
  90 struct nfs_lock_info {
  91         u32             state;
  92         u32             flags;
  93         struct nlm_host *host;
  94 };
  95
  96 /*
  97  * Lock flag values
  98  */
  99 #define NFS_LCK_GRANTED         0x0001          /* lock has been granted */
 100
 101 #endif