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};
 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
 42int 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 */
 46struct xfs_inode * xfs_inode_alloc(struct xfs_mount *mp, xfs_ino_t ino);
 47void xfs_inode_free(struct xfs_inode *ip);
 48
 49void xfs_reclaim_worker(struct work_struct *work);
 50
 51int xfs_reclaim_inodes(struct xfs_mount *mp, int mode);
 52int xfs_reclaim_inodes_count(struct xfs_mount *mp);
 53long xfs_reclaim_inodes_nr(struct xfs_mount *mp, int nr_to_scan);
 54
 55void xfs_inode_set_reclaim_tag(struct xfs_inode *ip);
 56
 57void xfs_inode_set_eofblocks_tag(struct xfs_inode *ip);
 58void xfs_inode_clear_eofblocks_tag(struct xfs_inode *ip);
 59int xfs_icache_free_eofblocks(struct xfs_mount *, struct xfs_eofblocks *);
 60void xfs_eofblocks_worker(struct work_struct *);
 61
 62int xfs_inode_ag_iterator(struct xfs_mount *mp,
 63	int (*execute)(struct xfs_inode *ip, struct xfs_perag *pag,
 64		int flags, void *args),
 65	int flags, void *args);
 66int xfs_inode_ag_iterator_tag(struct xfs_mount *mp,
 67	int (*execute)(struct xfs_inode *ip, struct xfs_perag *pag,
 68		int flags, void *args),
 69	int flags, void *args, int tag);
 70
 71static inline int
 72xfs_fs_eofblocks_from_user(
 73	struct xfs_fs_eofblocks		*src,
 74	struct xfs_eofblocks		*dst)
 75{
 76	if (src->eof_version != XFS_EOFBLOCKS_VERSION)
 77		return EINVAL;
 78
 79	if (src->eof_flags & ~XFS_EOF_FLAGS_VALID)
 80		return EINVAL;
 81
 82	if (memchr_inv(&src->pad32, 0, sizeof(src->pad32)) ||
 83	    memchr_inv(src->pad64, 0, sizeof(src->pad64)))
 84		return EINVAL;
 85
 86	dst->eof_flags = src->eof_flags;
 87	dst->eof_prid = src->eof_prid;
 88	dst->eof_min_file_size = src->eof_min_file_size;
 89
 90	dst->eof_uid = INVALID_UID;
 91	if (src->eof_flags & XFS_EOF_FLAGS_UID) {
 92		dst->eof_uid = make_kuid(current_user_ns(), src->eof_uid);
 93		if (!uid_valid(dst->eof_uid))
 94			return EINVAL;
 95	}
 96
 97	dst->eof_gid = INVALID_GID;
 98	if (src->eof_flags & XFS_EOF_FLAGS_GID) {
 99		dst->eof_gid = make_kgid(current_user_ns(), src->eof_gid);
100		if (!gid_valid(dst->eof_gid))
101			return EINVAL;
102	}
103	return 0;
104}
105
106#endif