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
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 void xfs_queue_eofblocks(struct xfs_mount *);
77
78 void xfs_inode_set_cowblocks_tag(struct xfs_inode *ip);
79 void xfs_inode_clear_cowblocks_tag(struct xfs_inode *ip);
80 int xfs_icache_free_cowblocks(struct xfs_mount *, struct xfs_eofblocks *);
81 int xfs_inode_free_quota_cowblocks(struct xfs_inode *ip);
82 void xfs_cowblocks_worker(struct work_struct *);
83
84 int xfs_inode_ag_iterator(struct xfs_mount *mp,
85 int (*execute)(struct xfs_inode *ip, int flags, void *args),
86 int flags, void *args);
87 int xfs_inode_ag_iterator_flags(struct xfs_mount *mp,
88 int (*execute)(struct xfs_inode *ip, int flags, void *args),
89 int flags, void *args, int iter_flags);
90 int xfs_inode_ag_iterator_tag(struct xfs_mount *mp,
91 int (*execute)(struct xfs_inode *ip, int flags, void *args),
92 int flags, void *args, int tag);
93
94 static inline int
xfs_fs_eofblocks_from_user(struct xfs_fs_eofblocks * src,struct xfs_eofblocks * dst)95 xfs_fs_eofblocks_from_user(
96 struct xfs_fs_eofblocks *src,
97 struct xfs_eofblocks *dst)
98 {
99 if (src->eof_version != XFS_EOFBLOCKS_VERSION)
100 return -EINVAL;
101
102 if (src->eof_flags & ~XFS_EOF_FLAGS_VALID)
103 return -EINVAL;
104
105 if (memchr_inv(&src->pad32, 0, sizeof(src->pad32)) ||
106 memchr_inv(src->pad64, 0, sizeof(src->pad64)))
107 return -EINVAL;
108
109 dst->eof_flags = src->eof_flags;
110 dst->eof_prid = src->eof_prid;
111 dst->eof_min_file_size = src->eof_min_file_size;
112
113 dst->eof_uid = INVALID_UID;
114 if (src->eof_flags & XFS_EOF_FLAGS_UID) {
115 dst->eof_uid = make_kuid(current_user_ns(), src->eof_uid);
116 if (!uid_valid(dst->eof_uid))
117 return -EINVAL;
118 }
119
120 dst->eof_gid = INVALID_GID;
121 if (src->eof_flags & XFS_EOF_FLAGS_GID) {
122 dst->eof_gid = make_kgid(current_user_ns(), src->eof_gid);
123 if (!gid_valid(dst->eof_gid))
124 return -EINVAL;
125 }
126 return 0;
127 }
128
129 #endif
130