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
  9struct xfs_mount;
 10struct xfs_perag;
 11
 12struct 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
 45int 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 */
 49struct xfs_inode * xfs_inode_alloc(struct xfs_mount *mp, xfs_ino_t ino);
 50void xfs_inode_free(struct xfs_inode *ip);
 51
 52void xfs_reclaim_worker(struct work_struct *work);
 53
 54int xfs_reclaim_inodes(struct xfs_mount *mp, int mode);
 55int xfs_reclaim_inodes_count(struct xfs_mount *mp);
 56long xfs_reclaim_inodes_nr(struct xfs_mount *mp, int nr_to_scan);
 57
 58void xfs_inode_set_reclaim_tag(struct xfs_inode *ip);
 59
 60void xfs_inode_set_eofblocks_tag(struct xfs_inode *ip);
 61void xfs_inode_clear_eofblocks_tag(struct xfs_inode *ip);
 62int xfs_icache_free_eofblocks(struct xfs_mount *, struct xfs_eofblocks *);
 63int xfs_inode_free_quota_eofblocks(struct xfs_inode *ip);
 64void xfs_eofblocks_worker(struct work_struct *);
 65void xfs_queue_eofblocks(struct xfs_mount *);
 66
 67void xfs_inode_set_cowblocks_tag(struct xfs_inode *ip);
 68void xfs_inode_clear_cowblocks_tag(struct xfs_inode *ip);
 69int xfs_icache_free_cowblocks(struct xfs_mount *, struct xfs_eofblocks *);
 70int xfs_inode_free_quota_cowblocks(struct xfs_inode *ip);
 71void xfs_cowblocks_worker(struct work_struct *);
 72void xfs_queue_cowblocks(struct xfs_mount *);
 73
 74int xfs_inode_ag_iterator(struct xfs_mount *mp,
 75	int (*execute)(struct xfs_inode *ip, int flags, void *args),
 76	int flags, void *args);
 77int 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);
 80int 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
 84static inline int
 85xfs_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
119int xfs_icache_inode_is_allocated(struct xfs_mount *mp, struct xfs_trans *tp,
120				  xfs_ino_t ino, bool *inuse);
121
122void xfs_stop_block_reaping(struct xfs_mount *mp);
123void xfs_start_block_reaping(struct xfs_mount *mp);
124
125#endif