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 /*
52 * flags for AG inode iterator
53 */
54 #define XFS_AGITER_INEW_WAIT 0x1 /* wait on new inodes */
55
56 int xfs_iget(struct xfs_mount *mp, struct xfs_trans *tp, xfs_ino_t ino,
57 uint flags, uint lock_flags, xfs_inode_t **ipp);
58
59 /* recovery needs direct inode allocation capability */
60 struct xfs_inode * xfs_inode_alloc(struct xfs_mount *mp, xfs_ino_t ino);
61 void xfs_inode_free(struct xfs_inode *ip);
62
63 void xfs_reclaim_worker(struct work_struct *work);
64
65 int xfs_reclaim_inodes(struct xfs_mount *mp, int mode);
66 int xfs_reclaim_inodes_count(struct xfs_mount *mp);
67 long xfs_reclaim_inodes_nr(struct xfs_mount *mp, int nr_to_scan);
68
69 void xfs_inode_set_reclaim_tag(struct xfs_inode *ip);
70
71 void xfs_inode_set_eofblocks_tag(struct xfs_inode *ip);
72 void xfs_inode_clear_eofblocks_tag(struct xfs_inode *ip);
73 int xfs_icache_free_eofblocks(struct xfs_mount *, struct xfs_eofblocks *);
74 int xfs_inode_free_quota_eofblocks(struct xfs_inode *ip);
75 void xfs_eofblocks_worker(struct work_struct *);
76
77 int xfs_inode_ag_iterator(struct xfs_mount *mp,
78 int (*execute)(struct xfs_inode *ip, int flags, void *args),
79 int flags, void *args);
80 int xfs_inode_ag_iterator_flags(struct xfs_mount *mp,
81 int (*execute)(struct xfs_inode *ip, int flags, void *args),
82 int flags, void *args, int iter_flags);
83 int xfs_inode_ag_iterator_tag(struct xfs_mount *mp,
84 int (*execute)(struct xfs_inode *ip, int flags, void *args),
85 int flags, void *args, int tag);
86
87 static inline int
xfs_fs_eofblocks_from_user(struct xfs_fs_eofblocks * src,struct xfs_eofblocks * dst)88 xfs_fs_eofblocks_from_user(
89 struct xfs_fs_eofblocks *src,
90 struct xfs_eofblocks *dst)
91 {
92 if (src->eof_version != XFS_EOFBLOCKS_VERSION)
93 return -EINVAL;
94
95 if (src->eof_flags & ~XFS_EOF_FLAGS_VALID)
96 return -EINVAL;
97
98 if (memchr_inv(&src->pad32, 0, sizeof(src->pad32)) ||
99 memchr_inv(src->pad64, 0, sizeof(src->pad64)))
100 return -EINVAL;
101
102 dst->eof_flags = src->eof_flags;
103 dst->eof_prid = src->eof_prid;
104 dst->eof_min_file_size = src->eof_min_file_size;
105 dst->eof_scan_owner = NULLFSINO;
106
107 dst->eof_uid = INVALID_UID;
108 if (src->eof_flags & XFS_EOF_FLAGS_UID) {
109 dst->eof_uid = make_kuid(current_user_ns(), src->eof_uid);
110 if (!uid_valid(dst->eof_uid))
111 return -EINVAL;
112 }
113
114 dst->eof_gid = INVALID_GID;
115 if (src->eof_flags & XFS_EOF_FLAGS_GID) {
116 dst->eof_gid = make_kgid(current_user_ns(), src->eof_gid);
117 if (!gid_valid(dst->eof_gid))
118 return -EINVAL;
119 }
120 return 0;
121 }
122
123 #endif
124