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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 };
 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  * tags for inode radix tree
 37  */
 38 #define XFS_ICI_NO_TAG          (-1)    /* special flag for an untagged lookup
 39                                            in xfs_inode_ag_iterator */
 40 #define XFS_ICI_RECLAIM_TAG     0       /* inode is to be reclaimed */
 41 #define XFS_ICI_EOFBLOCKS_TAG   1       /* inode has blocks beyond EOF */
 42 #define XFS_ICI_COWBLOCKS_TAG   2       /* inode can have cow blocks to gc */
 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 #define XFS_IGET_INCORE         0x8     /* don't read from disk or reinit */
 51 
 52 /*
 53  * flags for AG inode iterator
 54  */
 55 #define XFS_AGITER_INEW_WAIT    0x1     /* wait on new inodes */
 56 
 57 int xfs_iget(struct xfs_mount *mp, struct xfs_trans *tp, xfs_ino_t ino,
 58              uint flags, uint lock_flags, xfs_inode_t **ipp);
 59 
 60 /* recovery needs direct inode allocation capability */
 61 struct xfs_inode * xfs_inode_alloc(struct xfs_mount *mp, xfs_ino_t ino);
 62 void xfs_inode_free(struct xfs_inode *ip);
 63 
 64 void xfs_reclaim_worker(struct work_struct *work);
 65 
 66 int xfs_reclaim_inodes(struct xfs_mount *mp, int mode);
 67 int xfs_reclaim_inodes_count(struct xfs_mount *mp);
 68 long xfs_reclaim_inodes_nr(struct xfs_mount *mp, int nr_to_scan);
 69 
 70 void xfs_inode_set_reclaim_tag(struct xfs_inode *ip);
 71 
 72 void xfs_inode_set_eofblocks_tag(struct xfs_inode *ip);
 73 void xfs_inode_clear_eofblocks_tag(struct xfs_inode *ip);
 74 int xfs_icache_free_eofblocks(struct xfs_mount *, struct xfs_eofblocks *);
 75 int xfs_inode_free_quota_eofblocks(struct xfs_inode *ip);
 76 void xfs_eofblocks_worker(struct work_struct *);
 77 void xfs_queue_eofblocks(struct xfs_mount *);
 78 
 79 void xfs_inode_set_cowblocks_tag(struct xfs_inode *ip);
 80 void xfs_inode_clear_cowblocks_tag(struct xfs_inode *ip);
 81 int xfs_icache_free_cowblocks(struct xfs_mount *, struct xfs_eofblocks *);
 82 int xfs_inode_free_quota_cowblocks(struct xfs_inode *ip);
 83 void xfs_cowblocks_worker(struct work_struct *);
 84 
 85 int xfs_inode_ag_iterator(struct xfs_mount *mp,
 86         int (*execute)(struct xfs_inode *ip, int flags, void *args),
 87         int flags, void *args);
 88 int xfs_inode_ag_iterator_flags(struct xfs_mount *mp,
 89         int (*execute)(struct xfs_inode *ip, int flags, void *args),
 90         int flags, void *args, int iter_flags);
 91 int xfs_inode_ag_iterator_tag(struct xfs_mount *mp,
 92         int (*execute)(struct xfs_inode *ip, int flags, void *args),
 93         int flags, void *args, int tag);
 94 
 95 static inline int
 96 xfs_fs_eofblocks_from_user(
 97         struct xfs_fs_eofblocks         *src,
 98         struct xfs_eofblocks            *dst)
 99 {
100         if (src->eof_version != XFS_EOFBLOCKS_VERSION)
101                 return -EINVAL;
102 
103         if (src->eof_flags & ~XFS_EOF_FLAGS_VALID)
104                 return -EINVAL;
105 
106         if (memchr_inv(&src->pad32, 0, sizeof(src->pad32)) ||
107             memchr_inv(src->pad64, 0, sizeof(src->pad64)))
108                 return -EINVAL;
109 
110         dst->eof_flags = src->eof_flags;
111         dst->eof_prid = src->eof_prid;
112         dst->eof_min_file_size = src->eof_min_file_size;
113 
114         dst->eof_uid = INVALID_UID;
115         if (src->eof_flags & XFS_EOF_FLAGS_UID) {
116                 dst->eof_uid = make_kuid(current_user_ns(), src->eof_uid);
117                 if (!uid_valid(dst->eof_uid))
118                         return -EINVAL;
119         }
120 
121         dst->eof_gid = INVALID_GID;
122         if (src->eof_flags & XFS_EOF_FLAGS_GID) {
123                 dst->eof_gid = make_kgid(current_user_ns(), src->eof_gid);
124                 if (!gid_valid(dst->eof_gid))
125                         return -EINVAL;
126         }
127         return 0;
128 }
129 
130 int xfs_icache_inode_is_allocated(struct xfs_mount *mp, struct xfs_trans *tp,
131                                   xfs_ino_t ino, bool *inuse);
132 
133 #endif
134 

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