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xfs: report zeroed or not correctly in xfs_zero_range()
[mirror_ubuntu-artful-kernel.git] / fs / xfs / xfs_icache.h
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a167b17e
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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 */
fe4fa4b8
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18#ifndef XFS_SYNC_H
19#define XFS_SYNC_H 1
20
a167b17e 21struct xfs_mount;
fcafb71b 22struct xfs_perag;
a167b17e 23
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24struct 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
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32#define SYNC_WAIT 0x0001 /* wait for i/o to complete */
33#define SYNC_TRYLOCK 0x0002 /* only try to lock inodes */
a167b17e 34
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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 */
83104d44 42#define XFS_ICI_COWBLOCKS_TAG 2 /* inode can have cow blocks to gc */
4fb6e8ad 43
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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
378f681c 50#define XFS_IGET_INCORE 0x8 /* don't read from disk or reinit */
7bb85ef3 51
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52/*
53 * flags for AG inode iterator
54 */
55#define XFS_AGITER_INEW_WAIT 0x1 /* wait on new inodes */
56
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57int xfs_iget(struct xfs_mount *mp, struct xfs_trans *tp, xfs_ino_t ino,
58 uint flags, uint lock_flags, xfs_inode_t **ipp);
59
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60/* recovery needs direct inode allocation capability */
61struct xfs_inode * xfs_inode_alloc(struct xfs_mount *mp, xfs_ino_t ino);
62void xfs_inode_free(struct xfs_inode *ip);
63
33c7a2bc 64void xfs_reclaim_worker(struct work_struct *work);
a167b17e 65
abc10647 66int xfs_reclaim_inodes(struct xfs_mount *mp, int mode);
8daaa831 67int xfs_reclaim_inodes_count(struct xfs_mount *mp);
0a234c6d 68long xfs_reclaim_inodes_nr(struct xfs_mount *mp, int nr_to_scan);
fce08f2f 69
396beb85 70void xfs_inode_set_reclaim_tag(struct xfs_inode *ip);
fe588ed3 71
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72void xfs_inode_set_eofblocks_tag(struct xfs_inode *ip);
73void xfs_inode_clear_eofblocks_tag(struct xfs_inode *ip);
8ca149de 74int xfs_icache_free_eofblocks(struct xfs_mount *, struct xfs_eofblocks *);
dc06f398 75int xfs_inode_free_quota_eofblocks(struct xfs_inode *ip);
579b62fa 76void xfs_eofblocks_worker(struct work_struct *);
fa5a4f57 77void xfs_queue_eofblocks(struct xfs_mount *);
27b52867 78
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79void xfs_inode_set_cowblocks_tag(struct xfs_inode *ip);
80void xfs_inode_clear_cowblocks_tag(struct xfs_inode *ip);
81int xfs_icache_free_cowblocks(struct xfs_mount *, struct xfs_eofblocks *);
82int xfs_inode_free_quota_cowblocks(struct xfs_inode *ip);
83void xfs_cowblocks_worker(struct work_struct *);
84
fe588ed3 85int xfs_inode_ag_iterator(struct xfs_mount *mp,
e0094008 86 int (*execute)(struct xfs_inode *ip, int flags, void *args),
a454f742 87 int flags, void *args);
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88int xfs_inode_ag_iterator_flags(struct xfs_mount *mp,
89 int (*execute)(struct xfs_inode *ip, int flags, void *args),
90 int flags, void *args, int iter_flags);
a454f742 91int xfs_inode_ag_iterator_tag(struct xfs_mount *mp,
e0094008 92 int (*execute)(struct xfs_inode *ip, int flags, void *args),
a454f742 93 int flags, void *args, int tag);
9bf729c0 94
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95static inline int
96xfs_fs_eofblocks_from_user(
97 struct xfs_fs_eofblocks *src,
98 struct xfs_eofblocks *dst)
99{
100 if (src->eof_version != XFS_EOFBLOCKS_VERSION)
2451337d 101 return -EINVAL;
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102
103 if (src->eof_flags & ~XFS_EOF_FLAGS_VALID)
2451337d 104 return -EINVAL;
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105
106 if (memchr_inv(&src->pad32, 0, sizeof(src->pad32)) ||
107 memchr_inv(src->pad64, 0, sizeof(src->pad64)))
2451337d 108 return -EINVAL;
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109
110 dst->eof_flags = src->eof_flags;
111 dst->eof_prid = src->eof_prid;
112 dst->eof_min_file_size = src->eof_min_file_size;
113
114 dst->eof_uid = INVALID_UID;
115 if (src->eof_flags & XFS_EOF_FLAGS_UID) {
116 dst->eof_uid = make_kuid(current_user_ns(), src->eof_uid);
117 if (!uid_valid(dst->eof_uid))
2451337d 118 return -EINVAL;
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119 }
120
121 dst->eof_gid = INVALID_GID;
122 if (src->eof_flags & XFS_EOF_FLAGS_GID) {
123 dst->eof_gid = make_kgid(current_user_ns(), src->eof_gid);
124 if (!gid_valid(dst->eof_gid))
2451337d 125 return -EINVAL;
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126 }
127 return 0;
128}
129
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130int xfs_icache_inode_is_allocated(struct xfs_mount *mp, struct xfs_trans *tp,
131 xfs_ino_t ino, bool *inuse);
132
fe4fa4b8 133#endif