1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (c) 2000-2006 Silicon Graphics, Inc.
4 * All Rights Reserved.
5 */
6 #ifndef XFS_SYNC_H
7 #define XFS_SYNC_H 1
8
9 struct xfs_mount;
10 struct xfs_perag;
11
12 struct xfs_eofblocks {
13 __u32 eof_flags;
14 kuid_t eof_uid;
15 kgid_t eof_gid;
16 prid_t eof_prid;
17 __u64 eof_min_file_size;
18 };
19
20 #define SYNC_WAIT 0x0001 /* wait for i/o to complete */
21 #define SYNC_TRYLOCK 0x0002 /* only try to lock inodes */
22
23 /*
24 * tags for inode radix tree
25 */
26 #define XFS_ICI_NO_TAG (-1) /* special flag for an untagged lookup
27 in xfs_inode_ag_iterator */
28 #define XFS_ICI_RECLAIM_TAG 0 /* inode is to be reclaimed */
29 #define XFS_ICI_EOFBLOCKS_TAG 1 /* inode has blocks beyond EOF */
30 #define XFS_ICI_COWBLOCKS_TAG 2 /* inode can have cow blocks to gc */
31
32 /*
33 * Flags for xfs_iget()
34 */
35 #define XFS_IGET_CREATE 0x1
36 #define XFS_IGET_UNTRUSTED 0x2
37 #define XFS_IGET_DONTCACHE 0x4
38 #define XFS_IGET_INCORE 0x8 /* don't read from disk or reinit */
39
40 /*
41 * flags for AG inode iterator
42 */
43 #define XFS_AGITER_INEW_WAIT 0x1 /* wait on new inodes */
44
45 int xfs_iget(struct xfs_mount *mp, struct xfs_trans *tp, xfs_ino_t ino,
46 uint flags, uint lock_flags, xfs_inode_t **ipp);
47
48 /* recovery needs direct inode allocation capability */
49 struct xfs_inode * xfs_inode_alloc(struct xfs_mount *mp, xfs_ino_t ino);
50 void xfs_inode_free(struct xfs_inode *ip);
51
52 void xfs_reclaim_worker(struct work_struct *work);
53
54 int xfs_reclaim_inodes(struct xfs_mount *mp, int mode);
55 int xfs_reclaim_inodes_count(struct xfs_mount *mp);
56 long xfs_reclaim_inodes_nr(struct xfs_mount *mp, int nr_to_scan);
57
58 void xfs_inode_set_reclaim_tag(struct xfs_inode *ip);
59
60 void xfs_inode_set_eofblocks_tag(struct xfs_inode *ip);
61 void xfs_inode_clear_eofblocks_tag(struct xfs_inode *ip);
62 int xfs_icache_free_eofblocks(struct xfs_mount *, struct xfs_eofblocks *);
63 int xfs_inode_free_quota_eofblocks(struct xfs_inode *ip);
64 void xfs_eofblocks_worker(struct work_struct *);
65 void xfs_queue_eofblocks(struct xfs_mount *);
66
67 void xfs_inode_set_cowblocks_tag(struct xfs_inode *ip);
68 void xfs_inode_clear_cowblocks_tag(struct xfs_inode *ip);
69 int xfs_icache_free_cowblocks(struct xfs_mount *, struct xfs_eofblocks *);
70 int xfs_inode_free_quota_cowblocks(struct xfs_inode *ip);
71 void xfs_cowblocks_worker(struct work_struct *);
72 void xfs_queue_cowblocks(struct xfs_mount *);
73
74 int xfs_inode_ag_iterator(struct xfs_mount *mp,
75 int (*execute)(struct xfs_inode *ip, int flags, void *args),
76 int flags, void *args);
77 int xfs_inode_ag_iterator_flags(struct xfs_mount *mp,
78 int (*execute)(struct xfs_inode *ip, int flags, void *args),
79 int flags, void *args, int iter_flags);
80 int xfs_inode_ag_iterator_tag(struct xfs_mount *mp,
81 int (*execute)(struct xfs_inode *ip, int flags, void *args),
82 int flags, void *args, int tag);
83
84 static inline int
xfs_fs_eofblocks_from_user(struct xfs_fs_eofblocks * src,struct xfs_eofblocks * dst)85 xfs_fs_eofblocks_from_user(
86 struct xfs_fs_eofblocks *src,
87 struct xfs_eofblocks *dst)
88 {
89 if (src->eof_version != XFS_EOFBLOCKS_VERSION)
90 return -EINVAL;
91
92 if (src->eof_flags & ~XFS_EOF_FLAGS_VALID)
93 return -EINVAL;
94
95 if (memchr_inv(&src->pad32, 0, sizeof(src->pad32)) ||
96 memchr_inv(src->pad64, 0, sizeof(src->pad64)))
97 return -EINVAL;
98
99 dst->eof_flags = src->eof_flags;
100 dst->eof_prid = src->eof_prid;
101 dst->eof_min_file_size = src->eof_min_file_size;
102
103 dst->eof_uid = INVALID_UID;
104 if (src->eof_flags & XFS_EOF_FLAGS_UID) {
105 dst->eof_uid = make_kuid(current_user_ns(), src->eof_uid);
106 if (!uid_valid(dst->eof_uid))
107 return -EINVAL;
108 }
109
110 dst->eof_gid = INVALID_GID;
111 if (src->eof_flags & XFS_EOF_FLAGS_GID) {
112 dst->eof_gid = make_kgid(current_user_ns(), src->eof_gid);
113 if (!gid_valid(dst->eof_gid))
114 return -EINVAL;
115 }
116 return 0;
117 }
118
119 int xfs_icache_inode_is_allocated(struct xfs_mount *mp, struct xfs_trans *tp,
120 xfs_ino_t ino, bool *inuse);
121
122 void xfs_stop_block_reaping(struct xfs_mount *mp);
123 void xfs_start_block_reaping(struct xfs_mount *mp);
124
125 #endif
126