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 }; 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 * tags for inode radix tree 37 */ 38 #define XFS_ICI_NO_TAG (-1) /* special flag for an untagged lookup 39 in xfs_inode_ag_iterator */ 40 #define XFS_ICI_RECLAIM_TAG 0 /* inode is to be reclaimed */ 41 #define XFS_ICI_EOFBLOCKS_TAG 1 /* inode has blocks beyond EOF */ 42 #define XFS_ICI_COWBLOCKS_TAG 2 /* inode can have cow blocks to gc */ 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 51 int 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 */ 55 struct xfs_inode * xfs_inode_alloc(struct xfs_mount *mp, xfs_ino_t ino); 56 void xfs_inode_free(struct xfs_inode *ip); 57 58 void xfs_reclaim_worker(struct work_struct *work); 59 60 int xfs_reclaim_inodes(struct xfs_mount *mp, int mode); 61 int xfs_reclaim_inodes_count(struct xfs_mount *mp); 62 long xfs_reclaim_inodes_nr(struct xfs_mount *mp, int nr_to_scan); 63 64 void xfs_inode_set_reclaim_tag(struct xfs_inode *ip); 65 66 void xfs_inode_set_eofblocks_tag(struct xfs_inode *ip); 67 void xfs_inode_clear_eofblocks_tag(struct xfs_inode *ip); 68 int xfs_icache_free_eofblocks(struct xfs_mount *, struct xfs_eofblocks *); 69 int xfs_inode_free_quota_eofblocks(struct xfs_inode *ip); 70 void xfs_eofblocks_worker(struct work_struct *); 71 void xfs_queue_eofblocks(struct xfs_mount *); 72 73 void xfs_inode_set_cowblocks_tag(struct xfs_inode *ip); 74 void xfs_inode_clear_cowblocks_tag(struct xfs_inode *ip); 75 int xfs_icache_free_cowblocks(struct xfs_mount *, struct xfs_eofblocks *); 76 int xfs_inode_free_quota_cowblocks(struct xfs_inode *ip); 77 void xfs_cowblocks_worker(struct work_struct *); 78 79 int xfs_inode_ag_iterator(struct xfs_mount *mp, 80 int (*execute)(struct xfs_inode *ip, int flags, void *args), 81 int flags, void *args); 82 int xfs_inode_ag_iterator_tag(struct xfs_mount *mp, 83 int (*execute)(struct xfs_inode *ip, int flags, void *args), 84 int flags, void *args, int tag); 85 86 static inline int 87 xfs_fs_eofblocks_from_user( 88 struct xfs_fs_eofblocks *src, 89 struct xfs_eofblocks *dst) 90 { 91 if (src->eof_version != XFS_EOFBLOCKS_VERSION) 92 return -EINVAL; 93 94 if (src->eof_flags & ~XFS_EOF_FLAGS_VALID) 95 return -EINVAL; 96 97 if (memchr_inv(&src->pad32, 0, sizeof(src->pad32)) || 98 memchr_inv(src->pad64, 0, sizeof(src->pad64))) 99 return -EINVAL; 100 101 dst->eof_flags = src->eof_flags; 102 dst->eof_prid = src->eof_prid; 103 dst->eof_min_file_size = src->eof_min_file_size; 104 105 dst->eof_uid = INVALID_UID; 106 if (src->eof_flags & XFS_EOF_FLAGS_UID) { 107 dst->eof_uid = make_kuid(current_user_ns(), src->eof_uid); 108 if (!uid_valid(dst->eof_uid)) 109 return -EINVAL; 110 } 111 112 dst->eof_gid = INVALID_GID; 113 if (src->eof_flags & XFS_EOF_FLAGS_GID) { 114 dst->eof_gid = make_kgid(current_user_ns(), src->eof_gid); 115 if (!gid_valid(dst->eof_gid)) 116 return -EINVAL; 117 } 118 return 0; 119 } 120 121 #endif 122