LXR linux/fs/xfs/xfs

   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
 126