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 21 struct xfs_mount; 22 struct xfs_perag; 23 24 struct 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 #define XFS_ICI_COWBLOCKS_TAG 2 /* inode can have cow blocks to gc */ 44 45 /* 46 * Flags for xfs_iget() 47 */ 48 #define XFS_IGET_CREATE 0x1 49 #define XFS_IGET_UNTRUSTED 0x2 50 #define XFS_IGET_DONTCACHE 0x4 51 52 int xfs_iget(struct xfs_mount *mp, struct xfs_trans *tp, xfs_ino_t ino, 53 uint flags, uint lock_flags, xfs_inode_t **ipp); 54 55 /* recovery needs direct inode allocation capability */ 56 struct xfs_inode * xfs_inode_alloc(struct xfs_mount *mp, xfs_ino_t ino); 57 void xfs_inode_free(struct xfs_inode *ip); 58 59 void xfs_reclaim_worker(struct work_struct *work); 60 61 int xfs_reclaim_inodes(struct xfs_mount *mp, int mode); 62 int xfs_reclaim_inodes_count(struct xfs_mount *mp); 63 long xfs_reclaim_inodes_nr(struct xfs_mount *mp, int nr_to_scan); 64 65 void xfs_inode_set_reclaim_tag(struct xfs_inode *ip); 66 67 void xfs_inode_set_eofblocks_tag(struct xfs_inode *ip); 68 void xfs_inode_clear_eofblocks_tag(struct xfs_inode *ip); 69 int xfs_icache_free_eofblocks(struct xfs_mount *, struct xfs_eofblocks *); 70 int xfs_inode_free_quota_eofblocks(struct xfs_inode *ip); 71 void xfs_eofblocks_worker(struct work_struct *); 72 void xfs_queue_eofblocks(struct xfs_mount *); 73 74 void xfs_inode_set_cowblocks_tag(struct xfs_inode *ip); 75 void xfs_inode_clear_cowblocks_tag(struct xfs_inode *ip); 76 int xfs_icache_free_cowblocks(struct xfs_mount *, struct xfs_eofblocks *); 77 int xfs_inode_free_quota_cowblocks(struct xfs_inode *ip); 78 void xfs_cowblocks_worker(struct work_struct *); 79 80 int xfs_inode_ag_iterator(struct xfs_mount *mp, 81 int (*execute)(struct xfs_inode *ip, int flags, void *args), 82 int flags, void *args); 83 int xfs_inode_ag_iterator_tag(struct xfs_mount *mp, 84 int (*execute)(struct xfs_inode *ip, int flags, void *args), 85 int flags, void *args, int tag); 86 87 static inline int 88 xfs_fs_eofblocks_from_user( 89 struct xfs_fs_eofblocks *src, 90 struct xfs_eofblocks *dst) 91 { 92 if (src->eof_version != XFS_EOFBLOCKS_VERSION) 93 return -EINVAL; 94 95 if (src->eof_flags & ~XFS_EOF_FLAGS_VALID) 96 return -EINVAL; 97 98 if (memchr_inv(&src->pad32, 0, sizeof(src->pad32)) || 99 memchr_inv(src->pad64, 0, sizeof(src->pad64))) 100 return -EINVAL; 101 102 dst->eof_flags = src->eof_flags; 103 dst->eof_prid = src->eof_prid; 104 dst->eof_min_file_size = src->eof_min_file_size; 105 dst->eof_scan_owner = NULLFSINO; 106 107 dst->eof_uid = INVALID_UID; 108 if (src->eof_flags & XFS_EOF_FLAGS_UID) { 109 dst->eof_uid = make_kuid(current_user_ns(), src->eof_uid); 110 if (!uid_valid(dst->eof_uid)) 111 return -EINVAL; 112 } 113 114 dst->eof_gid = INVALID_GID; 115 if (src->eof_flags & XFS_EOF_FLAGS_GID) { 116 dst->eof_gid = make_kgid(current_user_ns(), src->eof_gid); 117 if (!gid_valid(dst->eof_gid)) 118 return -EINVAL; 119 } 120 return 0; 121 } 122 123 #endif 124