xref: /openbmc/linux/fs/xfs/xfs_icache.h (revision d2168146)
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  * Flags for xfs_iget()
37  */
38 #define XFS_IGET_CREATE		0x1
39 #define XFS_IGET_UNTRUSTED	0x2
40 #define XFS_IGET_DONTCACHE	0x4
41 
42 int xfs_iget(struct xfs_mount *mp, struct xfs_trans *tp, xfs_ino_t ino,
43 	     uint flags, uint lock_flags, xfs_inode_t **ipp);
44 
45 /* recovery needs direct inode allocation capability */
46 struct xfs_inode * xfs_inode_alloc(struct xfs_mount *mp, xfs_ino_t ino);
47 void xfs_inode_free(struct xfs_inode *ip);
48 
49 void xfs_reclaim_worker(struct work_struct *work);
50 
51 int xfs_reclaim_inodes(struct xfs_mount *mp, int mode);
52 int xfs_reclaim_inodes_count(struct xfs_mount *mp);
53 long xfs_reclaim_inodes_nr(struct xfs_mount *mp, int nr_to_scan);
54 
55 void xfs_inode_set_reclaim_tag(struct xfs_inode *ip);
56 
57 void xfs_inode_set_eofblocks_tag(struct xfs_inode *ip);
58 void xfs_inode_clear_eofblocks_tag(struct xfs_inode *ip);
59 int xfs_icache_free_eofblocks(struct xfs_mount *, struct xfs_eofblocks *);
60 void xfs_eofblocks_worker(struct work_struct *);
61 
62 int xfs_inode_ag_iterator(struct xfs_mount *mp,
63 	int (*execute)(struct xfs_inode *ip, int flags, void *args),
64 	int flags, void *args);
65 int xfs_inode_ag_iterator_tag(struct xfs_mount *mp,
66 	int (*execute)(struct xfs_inode *ip, int flags, void *args),
67 	int flags, void *args, int tag);
68 
69 static inline int
70 xfs_fs_eofblocks_from_user(
71 	struct xfs_fs_eofblocks		*src,
72 	struct xfs_eofblocks		*dst)
73 {
74 	if (src->eof_version != XFS_EOFBLOCKS_VERSION)
75 		return EINVAL;
76 
77 	if (src->eof_flags & ~XFS_EOF_FLAGS_VALID)
78 		return EINVAL;
79 
80 	if (memchr_inv(&src->pad32, 0, sizeof(src->pad32)) ||
81 	    memchr_inv(src->pad64, 0, sizeof(src->pad64)))
82 		return EINVAL;
83 
84 	dst->eof_flags = src->eof_flags;
85 	dst->eof_prid = src->eof_prid;
86 	dst->eof_min_file_size = src->eof_min_file_size;
87 
88 	dst->eof_uid = INVALID_UID;
89 	if (src->eof_flags & XFS_EOF_FLAGS_UID) {
90 		dst->eof_uid = make_kuid(current_user_ns(), src->eof_uid);
91 		if (!uid_valid(dst->eof_uid))
92 			return EINVAL;
93 	}
94 
95 	dst->eof_gid = INVALID_GID;
96 	if (src->eof_flags & XFS_EOF_FLAGS_GID) {
97 		dst->eof_gid = make_kgid(current_user_ns(), src->eof_gid);
98 		if (!gid_valid(dst->eof_gid))
99 			return EINVAL;
100 	}
101 	return 0;
102 }
103 
104 #endif
105