mirror of https://gitee.com/openkylin/linux.git
117 lines
3.5 KiB
C
117 lines
3.5 KiB
C
/*
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* Copyright (c) 2000-2006 Silicon Graphics, Inc.
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef XFS_SYNC_H
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#define XFS_SYNC_H 1
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struct xfs_mount;
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struct xfs_perag;
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struct xfs_eofblocks {
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__u32 eof_flags;
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kuid_t eof_uid;
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kgid_t eof_gid;
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prid_t eof_prid;
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__u64 eof_min_file_size;
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xfs_ino_t eof_scan_owner;
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};
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#define SYNC_WAIT 0x0001 /* wait for i/o to complete */
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#define SYNC_TRYLOCK 0x0002 /* only try to lock inodes */
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/*
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* tags for inode radix tree
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*/
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#define XFS_ICI_NO_TAG (-1) /* special flag for an untagged lookup
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in xfs_inode_ag_iterator */
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#define XFS_ICI_RECLAIM_TAG 0 /* inode is to be reclaimed */
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#define XFS_ICI_EOFBLOCKS_TAG 1 /* inode has blocks beyond EOF */
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/*
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* Flags for xfs_iget()
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*/
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#define XFS_IGET_CREATE 0x1
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#define XFS_IGET_UNTRUSTED 0x2
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#define XFS_IGET_DONTCACHE 0x4
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int xfs_iget(struct xfs_mount *mp, struct xfs_trans *tp, xfs_ino_t ino,
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uint flags, uint lock_flags, xfs_inode_t **ipp);
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/* recovery needs direct inode allocation capability */
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struct xfs_inode * xfs_inode_alloc(struct xfs_mount *mp, xfs_ino_t ino);
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void xfs_inode_free(struct xfs_inode *ip);
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void xfs_reclaim_worker(struct work_struct *work);
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int xfs_reclaim_inodes(struct xfs_mount *mp, int mode);
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int xfs_reclaim_inodes_count(struct xfs_mount *mp);
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long xfs_reclaim_inodes_nr(struct xfs_mount *mp, int nr_to_scan);
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void xfs_inode_set_reclaim_tag(struct xfs_inode *ip);
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void xfs_inode_set_eofblocks_tag(struct xfs_inode *ip);
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void xfs_inode_clear_eofblocks_tag(struct xfs_inode *ip);
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int xfs_icache_free_eofblocks(struct xfs_mount *, struct xfs_eofblocks *);
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int xfs_inode_free_quota_eofblocks(struct xfs_inode *ip);
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void xfs_eofblocks_worker(struct work_struct *);
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void xfs_queue_eofblocks(struct xfs_mount *);
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int xfs_inode_ag_iterator(struct xfs_mount *mp,
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int (*execute)(struct xfs_inode *ip, int flags, void *args),
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int flags, void *args);
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int xfs_inode_ag_iterator_tag(struct xfs_mount *mp,
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int (*execute)(struct xfs_inode *ip, int flags, void *args),
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int flags, void *args, int tag);
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static inline int
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xfs_fs_eofblocks_from_user(
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struct xfs_fs_eofblocks *src,
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struct xfs_eofblocks *dst)
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{
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if (src->eof_version != XFS_EOFBLOCKS_VERSION)
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return -EINVAL;
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if (src->eof_flags & ~XFS_EOF_FLAGS_VALID)
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return -EINVAL;
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if (memchr_inv(&src->pad32, 0, sizeof(src->pad32)) ||
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memchr_inv(src->pad64, 0, sizeof(src->pad64)))
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return -EINVAL;
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dst->eof_flags = src->eof_flags;
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dst->eof_prid = src->eof_prid;
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dst->eof_min_file_size = src->eof_min_file_size;
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dst->eof_scan_owner = NULLFSINO;
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dst->eof_uid = INVALID_UID;
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if (src->eof_flags & XFS_EOF_FLAGS_UID) {
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dst->eof_uid = make_kuid(current_user_ns(), src->eof_uid);
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if (!uid_valid(dst->eof_uid))
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return -EINVAL;
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}
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dst->eof_gid = INVALID_GID;
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if (src->eof_flags & XFS_EOF_FLAGS_GID) {
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dst->eof_gid = make_kgid(current_user_ns(), src->eof_gid);
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if (!gid_valid(dst->eof_gid))
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return -EINVAL;
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}
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return 0;
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}
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#endif
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