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TOMOYO Linux Cross Reference
Linux/fs/xfs/xfs_icache.h

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  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         xfs_ino_t       eof_scan_owner;
 31 };
 32 
 33 #define SYNC_WAIT               0x0001  /* wait for i/o to complete */
 34 #define SYNC_TRYLOCK            0x0002  /* only try to lock inodes */
 35 
 36 /*
 37  * tags for inode radix tree
 38  */
 39 #define XFS_ICI_NO_TAG          (-1)    /* special flag for an untagged lookup
 40                                            in xfs_inode_ag_iterator */
 41 #define XFS_ICI_RECLAIM_TAG     0       /* inode is to be reclaimed */
 42 #define XFS_ICI_EOFBLOCKS_TAG   1       /* inode has blocks beyond EOF */
 43 
 44 /*
 45  * Flags for xfs_iget()
 46  */
 47 #define XFS_IGET_CREATE         0x1
 48 #define XFS_IGET_UNTRUSTED      0x2
 49 #define XFS_IGET_DONTCACHE      0x4
 50 
 51 int xfs_iget(struct xfs_mount *mp, struct xfs_trans *tp, xfs_ino_t ino,
 52              uint flags, uint lock_flags, xfs_inode_t **ipp);
 53 
 54 /* recovery needs direct inode allocation capability */
 55 struct xfs_inode * xfs_inode_alloc(struct xfs_mount *mp, xfs_ino_t ino);
 56 void xfs_inode_free(struct xfs_inode *ip);
 57 
 58 void xfs_reclaim_worker(struct work_struct *work);
 59 
 60 int xfs_reclaim_inodes(struct xfs_mount *mp, int mode);
 61 int xfs_reclaim_inodes_count(struct xfs_mount *mp);
 62 long xfs_reclaim_inodes_nr(struct xfs_mount *mp, int nr_to_scan);
 63 
 64 void xfs_inode_set_reclaim_tag(struct xfs_inode *ip);
 65 
 66 void xfs_inode_set_eofblocks_tag(struct xfs_inode *ip);
 67 void xfs_inode_clear_eofblocks_tag(struct xfs_inode *ip);
 68 int xfs_icache_free_eofblocks(struct xfs_mount *, struct xfs_eofblocks *);
 69 int xfs_inode_free_quota_eofblocks(struct xfs_inode *ip);
 70 void xfs_eofblocks_worker(struct work_struct *);
 71 void xfs_queue_eofblocks(struct xfs_mount *);
 72 
 73 int xfs_inode_ag_iterator(struct xfs_mount *mp,
 74         int (*execute)(struct xfs_inode *ip, int flags, void *args),
 75         int flags, void *args);
 76 int xfs_inode_ag_iterator_tag(struct xfs_mount *mp,
 77         int (*execute)(struct xfs_inode *ip, int flags, void *args),
 78         int flags, void *args, int tag);
 79 
 80 static inline int
 81 xfs_fs_eofblocks_from_user(
 82         struct xfs_fs_eofblocks         *src,
 83         struct xfs_eofblocks            *dst)
 84 {
 85         if (src->eof_version != XFS_EOFBLOCKS_VERSION)
 86                 return -EINVAL;
 87 
 88         if (src->eof_flags & ~XFS_EOF_FLAGS_VALID)
 89                 return -EINVAL;
 90 
 91         if (memchr_inv(&src->pad32, 0, sizeof(src->pad32)) ||
 92             memchr_inv(src->pad64, 0, sizeof(src->pad64)))
 93                 return -EINVAL;
 94 
 95         dst->eof_flags = src->eof_flags;
 96         dst->eof_prid = src->eof_prid;
 97         dst->eof_min_file_size = src->eof_min_file_size;
 98         dst->eof_scan_owner = NULLFSINO;
 99 
100         dst->eof_uid = INVALID_UID;
101         if (src->eof_flags & XFS_EOF_FLAGS_UID) {
102                 dst->eof_uid = make_kuid(current_user_ns(), src->eof_uid);
103                 if (!uid_valid(dst->eof_uid))
104                         return -EINVAL;
105         }
106 
107         dst->eof_gid = INVALID_GID;
108         if (src->eof_flags & XFS_EOF_FLAGS_GID) {
109                 dst->eof_gid = make_kgid(current_user_ns(), src->eof_gid);
110                 if (!gid_valid(dst->eof_gid))
111                         return -EINVAL;
112         }
113         return 0;
114 }
115 
116 #endif
117 

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