fs/xfs/xfs_icache.h

   1 /*
   2  * Copyright (c) 2000-2006 Silicon Graphics, Inc.
   3  * All Rights Reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it would be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write the Free Software Foundation,
  16  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17  */
  18 #ifndef XFS_SYNC_H
  19 #define XFS_SYNC_H 1
  20
  21 struct xfs_mount;
  22 struct xfs_perag;
  23
  24 struct xfs_eofblocks {
  25         __u32           eof_flags;
  26         kuid_t          eof_uid;
  27         kgid_t          eof_gid;
  28         prid_t          eof_prid;
  29         __u64           eof_min_file_size;
  30 };
  31
  32 #define SYNC_WAIT               0x0001  /* wait for i/o to complete */
  33 #define SYNC_TRYLOCK            0x0002  /* only try to lock inodes */
  34
  35 /*
  36  * Flags for xfs_iget()
  37  */
  38 #define XFS_IGET_CREATE         0x1
  39 #define XFS_IGET_UNTRUSTED      0x2
  40 #define XFS_IGET_DONTCACHE      0x4
  41
  42 int xfs_iget(struct xfs_mount *mp, struct xfs_trans *tp, xfs_ino_t ino,
  43              uint flags, uint lock_flags, xfs_inode_t **ipp);
  44
  45 /* recovery needs direct inode allocation capability */
  46 struct xfs_inode * xfs_inode_alloc(struct xfs_mount *mp, xfs_ino_t ino);
  47 void xfs_inode_free(struct xfs_inode *ip);
  48
  49 void xfs_reclaim_worker(struct work_struct *work);
  50
  51 int xfs_reclaim_inodes(struct xfs_mount *mp, int mode);
  52 int xfs_reclaim_inodes_count(struct xfs_mount *mp);
  53 long xfs_reclaim_inodes_nr(struct xfs_mount *mp, int nr_to_scan);
  54
  55 void xfs_inode_set_reclaim_tag(struct xfs_inode *ip);
  56
  57 void xfs_inode_set_eofblocks_tag(struct xfs_inode *ip);
  58 void xfs_inode_clear_eofblocks_tag(struct xfs_inode *ip);
  59 int xfs_icache_free_eofblocks(struct xfs_mount *, struct xfs_eofblocks *);
  60 void xfs_eofblocks_worker(struct work_struct *);
  61
  62 int xfs_inode_ag_iterator(struct xfs_mount *mp,
  63         int (*execute)(struct xfs_inode *ip, struct xfs_perag *pag,
  64                 int flags, void *args),
  65         int flags, void *args);
  66 int xfs_inode_ag_iterator_tag(struct xfs_mount *mp,
  67         int (*execute)(struct xfs_inode *ip, struct xfs_perag *pag,
  68                 int flags, void *args),
  69         int flags, void *args, int tag);
  70
  71 static inline int
  72 xfs_fs_eofblocks_from_user(
  73         struct xfs_fs_eofblocks         *src,
  74         struct xfs_eofblocks            *dst)
  75 {
  76         if (src->eof_version != XFS_EOFBLOCKS_VERSION)
  77                 return EINVAL;
  78
  79         if (src->eof_flags & ~XFS_EOF_FLAGS_VALID)
  80                 return EINVAL;
  81
  82         if (memchr_inv(&src->pad32, 0, sizeof(src->pad32)) ||
  83             memchr_inv(src->pad64, 0, sizeof(src->pad64)))
  84                 return EINVAL;
  85
  86         dst->eof_flags = src->eof_flags;
  87         dst->eof_prid = src->eof_prid;
  88         dst->eof_min_file_size = src->eof_min_file_size;
  89
  90         dst->eof_uid = INVALID_UID;
  91         if (src->eof_flags & XFS_EOF_FLAGS_UID) {
  92                 dst->eof_uid = make_kuid(current_user_ns(), src->eof_uid);
  93                 if (!uid_valid(dst->eof_uid))
  94                         return EINVAL;
  95         }
  96
  97         dst->eof_gid = INVALID_GID;
  98         if (src->eof_flags & XFS_EOF_FLAGS_GID) {
  99                 dst->eof_gid = make_kgid(current_user_ns(), src->eof_gid);
 100                 if (!gid_valid(dst->eof_gid))
 101                         return EINVAL;
 102         }
 103         return 0;
 104 }
 105
 106 #endif