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_icache_disable_reclaim(struct xfs_mount *mp);
123 void xfs_icache_enable_reclaim(struct xfs_mount *mp);
124 
125 #endif
126