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
 21struct xfs_mount;
 22struct xfs_perag;
 23
 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	xfs_ino_t	eof_scan_owner;
 31};
 32
 33#define SYNC_WAIT		0x0001	/* wait for i/o to complete */
 34#define SYNC_TRYLOCK		0x0002  /* only try to lock inodes */
 35
 36/*
 37 * tags for inode radix tree
 38 */
 39#define XFS_ICI_NO_TAG		(-1)	/* special flag for an untagged lookup
 40					   in xfs_inode_ag_iterator */
 41#define XFS_ICI_RECLAIM_TAG	0	/* inode is to be reclaimed */
 42#define XFS_ICI_EOFBLOCKS_TAG	1	/* inode has blocks beyond EOF */
 43
 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
 50
 51int xfs_iget(struct xfs_mount *mp, struct xfs_trans *tp, xfs_ino_t ino,
 52	     uint flags, uint lock_flags, xfs_inode_t **ipp);
 53
 54/* recovery needs direct inode allocation capability */
 55struct xfs_inode * xfs_inode_alloc(struct xfs_mount *mp, xfs_ino_t ino);
 56void xfs_inode_free(struct xfs_inode *ip);
 57
 58void xfs_reclaim_worker(struct work_struct *work);
 59
 60int xfs_reclaim_inodes(struct xfs_mount *mp, int mode);
 61int xfs_reclaim_inodes_count(struct xfs_mount *mp);
 62long xfs_reclaim_inodes_nr(struct xfs_mount *mp, int nr_to_scan);
 63
 64void xfs_inode_set_reclaim_tag(struct xfs_inode *ip);
 65
 66void xfs_inode_set_eofblocks_tag(struct xfs_inode *ip);
 67void xfs_inode_clear_eofblocks_tag(struct xfs_inode *ip);
 68int xfs_icache_free_eofblocks(struct xfs_mount *, struct xfs_eofblocks *);
 69int xfs_inode_free_quota_eofblocks(struct xfs_inode *ip);
 70void xfs_eofblocks_worker(struct work_struct *);
 71
 72int xfs_inode_ag_iterator(struct xfs_mount *mp,
 73	int (*execute)(struct xfs_inode *ip, int flags, void *args),
 74	int flags, void *args);
 75int xfs_inode_ag_iterator_tag(struct xfs_mount *mp,
 76	int (*execute)(struct xfs_inode *ip, int flags, void *args),
 77	int flags, void *args, int tag);
 78
 79static inline int
 80xfs_fs_eofblocks_from_user(
 81	struct xfs_fs_eofblocks		*src,
 82	struct xfs_eofblocks		*dst)
 83{
 84	if (src->eof_version != XFS_EOFBLOCKS_VERSION)
 85		return -EINVAL;
 86
 87	if (src->eof_flags & ~XFS_EOF_FLAGS_VALID)
 88		return -EINVAL;
 89
 90	if (memchr_inv(&src->pad32, 0, sizeof(src->pad32)) ||
 91	    memchr_inv(src->pad64, 0, sizeof(src->pad64)))
 92		return -EINVAL;
 93
 94	dst->eof_flags = src->eof_flags;
 95	dst->eof_prid = src->eof_prid;
 96	dst->eof_min_file_size = src->eof_min_file_size;
 97	dst->eof_scan_owner = NULLFSINO;
 98
 99	dst->eof_uid = INVALID_UID;
100	if (src->eof_flags & XFS_EOF_FLAGS_UID) {
101		dst->eof_uid = make_kuid(current_user_ns(), src->eof_uid);
102		if (!uid_valid(dst->eof_uid))
103			return -EINVAL;
104	}
105
106	dst->eof_gid = INVALID_GID;
107	if (src->eof_flags & XFS_EOF_FLAGS_GID) {
108		dst->eof_gid = make_kgid(current_user_ns(), src->eof_gid);
109		if (!gid_valid(dst->eof_gid))
110			return -EINVAL;
111	}
112	return 0;
113}
114
115#endif