xref: /openbmc/linux/fs/xfs/xfs_mount.h (revision d5cb9783536a41df9f9cba5b0a1d78047ed787f7)
1 /*
2  * Copyright (c) 2000-2005 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_MOUNT_H__
19 #define	__XFS_MOUNT_H__
20 
21 typedef struct xfs_trans_reservations {
22 	uint	tr_write;	/* extent alloc trans */
23 	uint	tr_itruncate;	/* truncate trans */
24 	uint	tr_rename;	/* rename trans */
25 	uint	tr_link;	/* link trans */
26 	uint	tr_remove;	/* unlink trans */
27 	uint	tr_symlink;	/* symlink trans */
28 	uint	tr_create;	/* create trans */
29 	uint	tr_mkdir;	/* mkdir trans */
30 	uint	tr_ifree;	/* inode free trans */
31 	uint	tr_ichange;	/* inode update trans */
32 	uint	tr_growdata;	/* fs data section grow trans */
33 	uint	tr_swrite;	/* sync write inode trans */
34 	uint	tr_addafork;	/* cvt inode to attributed trans */
35 	uint	tr_writeid;	/* write setuid/setgid file */
36 	uint	tr_attrinval;	/* attr fork buffer invalidation */
37 	uint	tr_attrset;	/* set/create an attribute */
38 	uint	tr_attrrm;	/* remove an attribute */
39 	uint	tr_clearagi;	/* clear bad agi unlinked ino bucket */
40 	uint	tr_growrtalloc;	/* grow realtime allocations */
41 	uint	tr_growrtzero;	/* grow realtime zeroing */
42 	uint	tr_growrtfree;	/* grow realtime freeing */
43 } xfs_trans_reservations_t;
44 
45 #ifndef __KERNEL__
46 /*
47  * Moved here from xfs_ag.h to avoid reordering header files
48  */
49 #define XFS_DADDR_TO_AGNO(mp,d) \
50 	((xfs_agnumber_t)(XFS_BB_TO_FSBT(mp, d) / (mp)->m_sb.sb_agblocks))
51 #define XFS_DADDR_TO_AGBNO(mp,d) \
52 	((xfs_agblock_t)(XFS_BB_TO_FSBT(mp, d) % (mp)->m_sb.sb_agblocks))
53 #else
54 struct cred;
55 struct log;
56 struct vfs;
57 struct vnode;
58 struct xfs_mount_args;
59 struct xfs_ihash;
60 struct xfs_chash;
61 struct xfs_inode;
62 struct xfs_perag;
63 struct xfs_iocore;
64 struct xfs_bmbt_irec;
65 struct xfs_bmap_free;
66 
67 extern struct vfsops xfs_vfsops;
68 extern struct vnodeops xfs_vnodeops;
69 
70 #define	AIL_LOCK_T		lock_t
71 #define	AIL_LOCKINIT(x,y)	spinlock_init(x,y)
72 #define	AIL_LOCK_DESTROY(x)	spinlock_destroy(x)
73 #define	AIL_LOCK(mp,s)		s=mutex_spinlock(&(mp)->m_ail_lock)
74 #define	AIL_UNLOCK(mp,s)	mutex_spinunlock(&(mp)->m_ail_lock, s)
75 
76 
77 /*
78  * Prototypes and functions for the Data Migration subsystem.
79  */
80 
81 typedef int	(*xfs_send_data_t)(int, struct vnode *,
82 			xfs_off_t, size_t, int, vrwlock_t *);
83 typedef int	(*xfs_send_mmap_t)(struct vm_area_struct *, uint);
84 typedef int	(*xfs_send_destroy_t)(struct vnode *, dm_right_t);
85 typedef int	(*xfs_send_namesp_t)(dm_eventtype_t, struct vfs *,
86 			struct vnode *,
87 			dm_right_t, struct vnode *, dm_right_t,
88 			char *, char *, mode_t, int, int);
89 typedef void	(*xfs_send_unmount_t)(struct vfs *, struct vnode *,
90 			dm_right_t, mode_t, int, int);
91 
92 typedef struct xfs_dmops {
93 	xfs_send_data_t		xfs_send_data;
94 	xfs_send_mmap_t		xfs_send_mmap;
95 	xfs_send_destroy_t	xfs_send_destroy;
96 	xfs_send_namesp_t	xfs_send_namesp;
97 	xfs_send_unmount_t	xfs_send_unmount;
98 } xfs_dmops_t;
99 
100 #define XFS_SEND_DATA(mp, ev,vp,off,len,fl,lock) \
101 	(*(mp)->m_dm_ops.xfs_send_data)(ev,vp,off,len,fl,lock)
102 #define XFS_SEND_MMAP(mp, vma,fl) \
103 	(*(mp)->m_dm_ops.xfs_send_mmap)(vma,fl)
104 #define XFS_SEND_DESTROY(mp, vp,right) \
105 	(*(mp)->m_dm_ops.xfs_send_destroy)(vp,right)
106 #define XFS_SEND_NAMESP(mp, ev,b1,r1,b2,r2,n1,n2,mode,rval,fl) \
107 	(*(mp)->m_dm_ops.xfs_send_namesp)(ev,NULL,b1,r1,b2,r2,n1,n2,mode,rval,fl)
108 #define XFS_SEND_PREUNMOUNT(mp, vfs,b1,r1,b2,r2,n1,n2,mode,rval,fl) \
109 	(*(mp)->m_dm_ops.xfs_send_namesp)(DM_EVENT_PREUNMOUNT,vfs,b1,r1,b2,r2,n1,n2,mode,rval,fl)
110 #define XFS_SEND_UNMOUNT(mp, vfsp,vp,right,mode,rval,fl) \
111 	(*(mp)->m_dm_ops.xfs_send_unmount)(vfsp,vp,right,mode,rval,fl)
112 
113 
114 /*
115  * Prototypes and functions for the Quota Management subsystem.
116  */
117 
118 struct xfs_dquot;
119 struct xfs_dqtrxops;
120 struct xfs_quotainfo;
121 
122 typedef int	(*xfs_qminit_t)(struct xfs_mount *, uint *, uint *);
123 typedef int	(*xfs_qmmount_t)(struct xfs_mount *, uint, uint, int);
124 typedef int	(*xfs_qmunmount_t)(struct xfs_mount *);
125 typedef void	(*xfs_qmdone_t)(struct xfs_mount *);
126 typedef void	(*xfs_dqrele_t)(struct xfs_dquot *);
127 typedef int	(*xfs_dqattach_t)(struct xfs_inode *, uint);
128 typedef void	(*xfs_dqdetach_t)(struct xfs_inode *);
129 typedef int	(*xfs_dqpurgeall_t)(struct xfs_mount *, uint);
130 typedef int	(*xfs_dqvopalloc_t)(struct xfs_mount *,
131 			struct xfs_inode *, uid_t, gid_t, prid_t, uint,
132 			struct xfs_dquot **, struct xfs_dquot **);
133 typedef void	(*xfs_dqvopcreate_t)(struct xfs_trans *, struct xfs_inode *,
134 			struct xfs_dquot *, struct xfs_dquot *);
135 typedef int	(*xfs_dqvoprename_t)(struct xfs_inode **);
136 typedef struct xfs_dquot * (*xfs_dqvopchown_t)(
137 			struct xfs_trans *, struct xfs_inode *,
138 			struct xfs_dquot **, struct xfs_dquot *);
139 typedef int	(*xfs_dqvopchownresv_t)(struct xfs_trans *, struct xfs_inode *,
140 			struct xfs_dquot *, struct xfs_dquot *, uint);
141 
142 typedef struct xfs_qmops {
143 	xfs_qminit_t		xfs_qminit;
144 	xfs_qmdone_t		xfs_qmdone;
145 	xfs_qmmount_t		xfs_qmmount;
146 	xfs_qmunmount_t		xfs_qmunmount;
147 	xfs_dqrele_t		xfs_dqrele;
148 	xfs_dqattach_t		xfs_dqattach;
149 	xfs_dqdetach_t		xfs_dqdetach;
150 	xfs_dqpurgeall_t	xfs_dqpurgeall;
151 	xfs_dqvopalloc_t	xfs_dqvopalloc;
152 	xfs_dqvopcreate_t	xfs_dqvopcreate;
153 	xfs_dqvoprename_t	xfs_dqvoprename;
154 	xfs_dqvopchown_t	xfs_dqvopchown;
155 	xfs_dqvopchownresv_t	xfs_dqvopchownresv;
156 	struct xfs_dqtrxops	*xfs_dqtrxops;
157 } xfs_qmops_t;
158 
159 #define XFS_QM_INIT(mp, mnt, fl) \
160 	(*(mp)->m_qm_ops.xfs_qminit)(mp, mnt, fl)
161 #define XFS_QM_MOUNT(mp, mnt, fl, mfsi_flags) \
162 	(*(mp)->m_qm_ops.xfs_qmmount)(mp, mnt, fl, mfsi_flags)
163 #define XFS_QM_UNMOUNT(mp) \
164 	(*(mp)->m_qm_ops.xfs_qmunmount)(mp)
165 #define XFS_QM_DONE(mp) \
166 	(*(mp)->m_qm_ops.xfs_qmdone)(mp)
167 #define XFS_QM_DQRELE(mp, dq) \
168 	(*(mp)->m_qm_ops.xfs_dqrele)(dq)
169 #define XFS_QM_DQATTACH(mp, ip, fl) \
170 	(*(mp)->m_qm_ops.xfs_dqattach)(ip, fl)
171 #define XFS_QM_DQDETACH(mp, ip) \
172 	(*(mp)->m_qm_ops.xfs_dqdetach)(ip)
173 #define XFS_QM_DQPURGEALL(mp, fl) \
174 	(*(mp)->m_qm_ops.xfs_dqpurgeall)(mp, fl)
175 #define XFS_QM_DQVOPALLOC(mp, ip, uid, gid, prid, fl, dq1, dq2) \
176 	(*(mp)->m_qm_ops.xfs_dqvopalloc)(mp, ip, uid, gid, prid, fl, dq1, dq2)
177 #define XFS_QM_DQVOPCREATE(mp, tp, ip, dq1, dq2) \
178 	(*(mp)->m_qm_ops.xfs_dqvopcreate)(tp, ip, dq1, dq2)
179 #define XFS_QM_DQVOPRENAME(mp, ip) \
180 	(*(mp)->m_qm_ops.xfs_dqvoprename)(ip)
181 #define XFS_QM_DQVOPCHOWN(mp, tp, ip, dqp, dq) \
182 	(*(mp)->m_qm_ops.xfs_dqvopchown)(tp, ip, dqp, dq)
183 #define XFS_QM_DQVOPCHOWNRESV(mp, tp, ip, dq1, dq2, fl) \
184 	(*(mp)->m_qm_ops.xfs_dqvopchownresv)(tp, ip, dq1, dq2, fl)
185 
186 
187 /*
188  * Prototypes and functions for I/O core modularization.
189  */
190 
191 typedef int		(*xfs_ioinit_t)(struct vfs *,
192 				struct xfs_mount_args *, int);
193 typedef int		(*xfs_bmapi_t)(struct xfs_trans *, void *,
194 				xfs_fileoff_t, xfs_filblks_t, int,
195 				xfs_fsblock_t *, xfs_extlen_t,
196 				struct xfs_bmbt_irec *, int *,
197 				struct xfs_bmap_free *);
198 typedef int		(*xfs_bmap_eof_t)(void *, xfs_fileoff_t, int, int *);
199 typedef int		(*xfs_iomap_write_direct_t)(
200 				void *, xfs_off_t, size_t, int,
201 				struct xfs_bmbt_irec *, int *, int);
202 typedef int		(*xfs_iomap_write_delay_t)(
203 				void *, xfs_off_t, size_t, int,
204 				struct xfs_bmbt_irec *, int *);
205 typedef int		(*xfs_iomap_write_allocate_t)(
206 				void *, xfs_off_t, size_t,
207 				struct xfs_bmbt_irec *, int *);
208 typedef int		(*xfs_iomap_write_unwritten_t)(
209 				void *, xfs_off_t, size_t);
210 typedef uint		(*xfs_lck_map_shared_t)(void *);
211 typedef void		(*xfs_lock_t)(void *, uint);
212 typedef void		(*xfs_lock_demote_t)(void *, uint);
213 typedef int		(*xfs_lock_nowait_t)(void *, uint);
214 typedef void		(*xfs_unlk_t)(void *, unsigned int);
215 typedef xfs_fsize_t	(*xfs_size_t)(void *);
216 typedef xfs_fsize_t	(*xfs_iodone_t)(struct vfs *);
217 
218 typedef struct xfs_ioops {
219 	xfs_ioinit_t			xfs_ioinit;
220 	xfs_bmapi_t			xfs_bmapi_func;
221 	xfs_bmap_eof_t			xfs_bmap_eof_func;
222 	xfs_iomap_write_direct_t	xfs_iomap_write_direct;
223 	xfs_iomap_write_delay_t		xfs_iomap_write_delay;
224 	xfs_iomap_write_allocate_t	xfs_iomap_write_allocate;
225 	xfs_iomap_write_unwritten_t	xfs_iomap_write_unwritten;
226 	xfs_lock_t			xfs_ilock;
227 	xfs_lck_map_shared_t		xfs_lck_map_shared;
228 	xfs_lock_demote_t		xfs_ilock_demote;
229 	xfs_lock_nowait_t		xfs_ilock_nowait;
230 	xfs_unlk_t			xfs_unlock;
231 	xfs_size_t			xfs_size_func;
232 	xfs_iodone_t			xfs_iodone;
233 } xfs_ioops_t;
234 
235 #define XFS_IOINIT(vfsp, args, flags) \
236 	(*(mp)->m_io_ops.xfs_ioinit)(vfsp, args, flags)
237 #define XFS_BMAPI(mp, trans,io,bno,len,f,first,tot,mval,nmap,flist)	\
238 	(*(mp)->m_io_ops.xfs_bmapi_func) \
239 		(trans,(io)->io_obj,bno,len,f,first,tot,mval,nmap,flist)
240 #define XFS_BMAP_EOF(mp, io, endoff, whichfork, eof) \
241 	(*(mp)->m_io_ops.xfs_bmap_eof_func) \
242 		((io)->io_obj, endoff, whichfork, eof)
243 #define XFS_IOMAP_WRITE_DIRECT(mp, io, offset, count, flags, mval, nmap, found)\
244 	(*(mp)->m_io_ops.xfs_iomap_write_direct) \
245 		((io)->io_obj, offset, count, flags, mval, nmap, found)
246 #define XFS_IOMAP_WRITE_DELAY(mp, io, offset, count, flags, mval, nmap) \
247 	(*(mp)->m_io_ops.xfs_iomap_write_delay) \
248 		((io)->io_obj, offset, count, flags, mval, nmap)
249 #define XFS_IOMAP_WRITE_ALLOCATE(mp, io, offset, count, mval, nmap) \
250 	(*(mp)->m_io_ops.xfs_iomap_write_allocate) \
251 		((io)->io_obj, offset, count, mval, nmap)
252 #define XFS_IOMAP_WRITE_UNWRITTEN(mp, io, offset, count) \
253 	(*(mp)->m_io_ops.xfs_iomap_write_unwritten) \
254 		((io)->io_obj, offset, count)
255 #define XFS_LCK_MAP_SHARED(mp, io) \
256 	(*(mp)->m_io_ops.xfs_lck_map_shared)((io)->io_obj)
257 #define XFS_ILOCK(mp, io, mode) \
258 	(*(mp)->m_io_ops.xfs_ilock)((io)->io_obj, mode)
259 #define XFS_ILOCK_NOWAIT(mp, io, mode) \
260 	(*(mp)->m_io_ops.xfs_ilock_nowait)((io)->io_obj, mode)
261 #define XFS_IUNLOCK(mp, io, mode) \
262 	(*(mp)->m_io_ops.xfs_unlock)((io)->io_obj, mode)
263 #define XFS_ILOCK_DEMOTE(mp, io, mode) \
264 	(*(mp)->m_io_ops.xfs_ilock_demote)((io)->io_obj, mode)
265 #define XFS_SIZE(mp, io) \
266 	(*(mp)->m_io_ops.xfs_size_func)((io)->io_obj)
267 #define XFS_IODONE(vfsp) \
268 	(*(mp)->m_io_ops.xfs_iodone)(vfsp)
269 
270 
271 typedef struct xfs_mount {
272 	bhv_desc_t		m_bhv;		/* vfs xfs behavior */
273 	xfs_tid_t		m_tid;		/* next unused tid for fs */
274 	AIL_LOCK_T		m_ail_lock;	/* fs AIL mutex */
275 	xfs_ail_entry_t		m_ail;		/* fs active log item list */
276 	uint			m_ail_gen;	/* fs AIL generation count */
277 	xfs_sb_t		m_sb;		/* copy of fs superblock */
278 	lock_t			m_sb_lock;	/* sb counter mutex */
279 	struct xfs_buf		*m_sb_bp;	/* buffer for superblock */
280 	char			*m_fsname;	/* filesystem name */
281 	int			m_fsname_len;	/* strlen of fs name */
282 	char			*m_rtname;	/* realtime device name */
283 	char			*m_logname;	/* external log device name */
284 	int			m_bsize;	/* fs logical block size */
285 	xfs_agnumber_t		m_agfrotor;	/* last ag where space found */
286 	xfs_agnumber_t		m_agirotor;	/* last ag dir inode alloced */
287 	lock_t			m_agirotor_lock;/* .. and lock protecting it */
288 	xfs_agnumber_t		m_maxagi;	/* highest inode alloc group */
289 	uint			m_ihsize;	/* size of next field */
290 	struct xfs_ihash	*m_ihash;	/* fs private inode hash table*/
291 	struct xfs_inode	*m_inodes;	/* active inode list */
292 	struct list_head	m_del_inodes;	/* inodes to reclaim */
293 	mutex_t			m_ilock;	/* inode list mutex */
294 	uint			m_ireclaims;	/* count of calls to reclaim*/
295 	uint			m_readio_log;	/* min read size log bytes */
296 	uint			m_readio_blocks; /* min read size blocks */
297 	uint			m_writeio_log;	/* min write size log bytes */
298 	uint			m_writeio_blocks; /* min write size blocks */
299 	struct log		*m_log;		/* log specific stuff */
300 	int			m_logbufs;	/* number of log buffers */
301 	int			m_logbsize;	/* size of each log buffer */
302 	uint			m_rsumlevels;	/* rt summary levels */
303 	uint			m_rsumsize;	/* size of rt summary, bytes */
304 	struct xfs_inode	*m_rbmip;	/* pointer to bitmap inode */
305 	struct xfs_inode	*m_rsumip;	/* pointer to summary inode */
306 	struct xfs_inode	*m_rootip;	/* pointer to root directory */
307 	struct xfs_quotainfo	*m_quotainfo;	/* disk quota information */
308 	xfs_buftarg_t		*m_ddev_targp;	/* saves taking the address */
309 	xfs_buftarg_t		*m_logdev_targp;/* ptr to log device */
310 	xfs_buftarg_t		*m_rtdev_targp;	/* ptr to rt device */
311 #define m_dev		m_ddev_targp->pbr_dev
312 	__uint8_t		m_dircook_elog;	/* log d-cookie entry bits */
313 	__uint8_t		m_blkbit_log;	/* blocklog + NBBY */
314 	__uint8_t		m_blkbb_log;	/* blocklog - BBSHIFT */
315 	__uint8_t		m_agno_log;	/* log #ag's */
316 	__uint8_t		m_agino_log;	/* #bits for agino in inum */
317 	__uint8_t		m_nreadaheads;	/* #readahead buffers */
318 	__uint16_t		m_inode_cluster_size;/* min inode buf size */
319 	uint			m_blockmask;	/* sb_blocksize-1 */
320 	uint			m_blockwsize;	/* sb_blocksize in words */
321 	uint			m_blockwmask;	/* blockwsize-1 */
322 	uint			m_alloc_mxr[2];	/* XFS_ALLOC_BLOCK_MAXRECS */
323 	uint			m_alloc_mnr[2];	/* XFS_ALLOC_BLOCK_MINRECS */
324 	uint			m_bmap_dmxr[2];	/* XFS_BMAP_BLOCK_DMAXRECS */
325 	uint			m_bmap_dmnr[2];	/* XFS_BMAP_BLOCK_DMINRECS */
326 	uint			m_inobt_mxr[2];	/* XFS_INOBT_BLOCK_MAXRECS */
327 	uint			m_inobt_mnr[2];	/* XFS_INOBT_BLOCK_MINRECS */
328 	uint			m_ag_maxlevels;	/* XFS_AG_MAXLEVELS */
329 	uint			m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */
330 	uint			m_in_maxlevels;	/* XFS_IN_MAXLEVELS */
331 	struct xfs_perag	*m_perag;	/* per-ag accounting info */
332 	struct rw_semaphore	m_peraglock;	/* lock for m_perag (pointer) */
333 	sema_t			m_growlock;	/* growfs mutex */
334 	int			m_fixedfsid[2];	/* unchanged for life of FS */
335 	uint			m_dmevmask;	/* DMI events for this FS */
336 	__uint64_t		m_flags;	/* global mount flags */
337 	uint			m_attroffset;	/* inode attribute offset */
338 	uint			m_dir_node_ents; /* #entries in a dir danode */
339 	uint			m_attr_node_ents; /* #entries in attr danode */
340 	int			m_ialloc_inos;	/* inodes in inode allocation */
341 	int			m_ialloc_blks;	/* blocks in inode allocation */
342 	int			m_litino;	/* size of inode union area */
343 	int			m_inoalign_mask;/* mask sb_inoalignmt if used */
344 	uint			m_qflags;	/* quota status flags */
345 	xfs_trans_reservations_t m_reservations;/* precomputed res values */
346 	__uint64_t		m_maxicount;	/* maximum inode count */
347 	__uint64_t		m_maxioffset;	/* maximum inode offset */
348 	__uint64_t		m_resblks;	/* total reserved blocks */
349 	__uint64_t		m_resblks_avail;/* available reserved blocks */
350 #if XFS_BIG_INUMS
351 	xfs_ino_t		m_inoadd;	/* add value for ino64_offset */
352 #endif
353 	int			m_dalign;	/* stripe unit */
354 	int			m_swidth;	/* stripe width */
355 	int			m_sinoalign;	/* stripe unit inode alignmnt */
356 	int			m_attr_magicpct;/* 37% of the blocksize */
357 	int			m_dir_magicpct;	/* 37% of the dir blocksize */
358 	__uint8_t		m_mk_sharedro;	/* mark shared ro on unmount */
359 	__uint8_t		m_inode_quiesce;/* call quiesce on new inodes.
360 						   field governed by m_ilock */
361 	__uint8_t		m_sectbb_log;	/* sectlog - BBSHIFT */
362 	__uint8_t		m_dirversion;	/* 1 or 2 */
363 	xfs_dirops_t		m_dirops;	/* table of dir funcs */
364 	int			m_dirblksize;	/* directory block sz--bytes */
365 	int			m_dirblkfsbs;	/* directory block sz--fsbs */
366 	xfs_dablk_t		m_dirdatablk;	/* blockno of dir data v2 */
367 	xfs_dablk_t		m_dirleafblk;	/* blockno of dir non-data v2 */
368 	xfs_dablk_t		m_dirfreeblk;	/* blockno of dirfreeindex v2 */
369 	uint			m_chsize;	/* size of next field */
370 	struct xfs_chash	*m_chash;	/* fs private inode per-cluster
371 						 * hash table */
372 	struct xfs_dmops	m_dm_ops;	/* vector of DMI ops */
373 	struct xfs_qmops	m_qm_ops;	/* vector of XQM ops */
374 	struct xfs_ioops	m_io_ops;	/* vector of I/O ops */
375 	atomic_t		m_active_trans;	/* number trans frozen */
376 } xfs_mount_t;
377 
378 /*
379  * Flags for m_flags.
380  */
381 #define	XFS_MOUNT_WSYNC		(1ULL << 0)	/* for nfs - all metadata ops
382 						   must be synchronous except
383 						   for space allocations */
384 #define	XFS_MOUNT_INO64		(1ULL << 1)
385 			     /* (1ULL << 2)	-- currently unused */
386 			     /* (1ULL << 3)	-- currently unused */
387 #define XFS_MOUNT_FS_SHUTDOWN	(1ULL << 4)	/* atomic stop of all filesystem
388 						   operations, typically for
389 						   disk errors in metadata */
390 #define XFS_MOUNT_NOATIME	(1ULL << 5)	/* don't modify inode access
391 						   times on reads */
392 #define XFS_MOUNT_RETERR	(1ULL << 6)     /* return alignment errors to
393 						   user */
394 #define XFS_MOUNT_NOALIGN	(1ULL << 7)	/* turn off stripe alignment
395 						   allocations */
396 #define XFS_MOUNT_COMPAT_ATTR	(1ULL << 8)	/* do not use attr2 format */
397 			     /*	(1ULL << 9)	-- currently unused */
398 #define XFS_MOUNT_NORECOVERY	(1ULL << 10)	/* no recovery - dirty fs */
399 #define XFS_MOUNT_SHARED	(1ULL << 11)	/* shared mount */
400 #define XFS_MOUNT_DFLT_IOSIZE	(1ULL << 12)	/* set default i/o size */
401 #define XFS_MOUNT_OSYNCISOSYNC	(1ULL << 13)	/* o_sync is REALLY o_sync */
402 						/* osyncisdsync is now default*/
403 #define XFS_MOUNT_32BITINODES	(1ULL << 14)	/* do not create inodes above
404 						 * 32 bits in size */
405 			     /* (1ULL << 15)	-- currently unused */
406 #define XFS_MOUNT_NOUUID	(1ULL << 16)	/* ignore uuid during mount */
407 #define XFS_MOUNT_BARRIER	(1ULL << 17)
408 #define XFS_MOUNT_IDELETE	(1ULL << 18)	/* delete empty inode clusters*/
409 #define XFS_MOUNT_SWALLOC	(1ULL << 19)	/* turn on stripe width
410 						 * allocation */
411 #define XFS_MOUNT_IHASHSIZE	(1ULL << 20)	/* inode hash table size */
412 #define XFS_MOUNT_DIRSYNC	(1ULL << 21)	/* synchronous directory ops */
413 #define XFS_MOUNT_COMPAT_IOSIZE	(1ULL << 22)	/* don't report large preferred
414 						 * I/O size in stat() */
415 
416 
417 /*
418  * Default minimum read and write sizes.
419  */
420 #define XFS_READIO_LOG_LARGE	16
421 #define XFS_WRITEIO_LOG_LARGE	16
422 
423 /*
424  * Max and min values for mount-option defined I/O
425  * preallocation sizes.
426  */
427 #define XFS_MAX_IO_LOG		30	/* 1G */
428 #define XFS_MIN_IO_LOG		PAGE_SHIFT
429 
430 /*
431  * Synchronous read and write sizes.  This should be
432  * better for NFSv2 wsync filesystems.
433  */
434 #define	XFS_WSYNC_READIO_LOG	15	/* 32K */
435 #define	XFS_WSYNC_WRITEIO_LOG	14	/* 16K */
436 
437 /*
438  * Allow large block sizes to be reported to userspace programs if the
439  * "largeio" mount option is used.
440  *
441  * If compatibility mode is specified, simply return the basic unit of caching
442  * so that we don't get inefficient read/modify/write I/O from user apps.
443  * Otherwise....
444  *
445  * If the underlying volume is a stripe, then return the stripe width in bytes
446  * as the recommended I/O size. It is not a stripe and we've set a default
447  * buffered I/O size, return that, otherwise return the compat default.
448  */
449 static inline unsigned long
450 xfs_preferred_iosize(xfs_mount_t *mp)
451 {
452 	if (mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE)
453 		return PAGE_CACHE_SIZE;
454 	return (mp->m_swidth ?
455 		(mp->m_swidth << mp->m_sb.sb_blocklog) :
456 		((mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) ?
457 			(1 << (int)MAX(mp->m_readio_log, mp->m_writeio_log)) :
458 			PAGE_CACHE_SIZE));
459 }
460 
461 #define XFS_MAXIOFFSET(mp)	((mp)->m_maxioffset)
462 
463 #define XFS_FORCED_SHUTDOWN(mp)	((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN)
464 #define xfs_force_shutdown(m,f)	\
465 	VFS_FORCE_SHUTDOWN((XFS_MTOVFS(m)), f, __FILE__, __LINE__)
466 
467 /*
468  * Flags sent to xfs_force_shutdown.
469  */
470 #define XFS_METADATA_IO_ERROR	0x1
471 #define XFS_LOG_IO_ERROR	0x2
472 #define XFS_FORCE_UMOUNT	0x4
473 #define XFS_CORRUPT_INCORE	0x8	/* Corrupt in-memory data structures */
474 #define XFS_SHUTDOWN_REMOTE_REQ 0x10	/* Shutdown came from remote cell */
475 
476 /*
477  * xflags for xfs_syncsub
478  */
479 #define XFS_XSYNC_RELOC		0x01
480 
481 /*
482  * Flags for xfs_mountfs
483  */
484 #define XFS_MFSI_SECOND		0x01	/* Secondary mount -- skip stuff */
485 #define XFS_MFSI_CLIENT		0x02	/* Is a client -- skip lots of stuff */
486 #define XFS_MFSI_NOUNLINK	0x08	/* Skip unlinked inode processing in */
487 					/* log recovery */
488 #define XFS_MFSI_NO_QUOTACHECK	0x10	/* Skip quotacheck processing */
489 
490 /*
491  * Macros for getting from mount to vfs and back.
492  */
493 #define	XFS_MTOVFS(mp)		xfs_mtovfs(mp)
494 static inline struct vfs *xfs_mtovfs(xfs_mount_t *mp)
495 {
496 	return bhvtovfs(&mp->m_bhv);
497 }
498 
499 #define	XFS_BHVTOM(bdp)	xfs_bhvtom(bdp)
500 static inline xfs_mount_t *xfs_bhvtom(bhv_desc_t *bdp)
501 {
502 	return (xfs_mount_t *)BHV_PDATA(bdp);
503 }
504 
505 #define XFS_VFSTOM(vfs) xfs_vfstom(vfs)
506 static inline xfs_mount_t *xfs_vfstom(vfs_t *vfs)
507 {
508 	return XFS_BHVTOM(bhv_lookup(VFS_BHVHEAD(vfs), &xfs_vfsops));
509 }
510 
511 #define XFS_DADDR_TO_AGNO(mp,d)         xfs_daddr_to_agno(mp,d)
512 static inline xfs_agnumber_t
513 xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d)
514 {
515 	xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d);
516 	do_div(ld, mp->m_sb.sb_agblocks);
517 	return (xfs_agnumber_t) ld;
518 }
519 
520 #define XFS_DADDR_TO_AGBNO(mp,d)        xfs_daddr_to_agbno(mp,d)
521 static inline xfs_agblock_t
522 xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d)
523 {
524 	xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d);
525 	return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks);
526 }
527 
528 /*
529  * This structure is for use by the xfs_mod_incore_sb_batch() routine.
530  */
531 typedef struct xfs_mod_sb {
532 	xfs_sb_field_t	msb_field;	/* Field to modify, see below */
533 	int		msb_delta;	/* Change to make to specified field */
534 } xfs_mod_sb_t;
535 
536 #define	XFS_MOUNT_ILOCK(mp)	mutex_lock(&((mp)->m_ilock), PINOD)
537 #define	XFS_MOUNT_IUNLOCK(mp)	mutex_unlock(&((mp)->m_ilock))
538 #define	XFS_SB_LOCK(mp)		mutex_spinlock(&(mp)->m_sb_lock)
539 #define	XFS_SB_UNLOCK(mp,s)	mutex_spinunlock(&(mp)->m_sb_lock,(s))
540 
541 extern xfs_mount_t *xfs_mount_init(void);
542 extern void	xfs_mod_sb(xfs_trans_t *, __int64_t);
543 extern void	xfs_mount_free(xfs_mount_t *mp, int remove_bhv);
544 extern int	xfs_mountfs(struct vfs *, xfs_mount_t *mp, int);
545 extern void	xfs_mountfs_check_barriers(xfs_mount_t *mp);
546 
547 extern int	xfs_unmountfs(xfs_mount_t *, struct cred *);
548 extern void	xfs_unmountfs_close(xfs_mount_t *, struct cred *);
549 extern int	xfs_unmountfs_writesb(xfs_mount_t *);
550 extern int	xfs_unmount_flush(xfs_mount_t *, int);
551 extern int	xfs_mod_incore_sb(xfs_mount_t *, xfs_sb_field_t, int, int);
552 extern int	xfs_mod_incore_sb_batch(xfs_mount_t *, xfs_mod_sb_t *,
553 			uint, int);
554 extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int);
555 extern int	xfs_readsb(xfs_mount_t *mp);
556 extern void	xfs_freesb(xfs_mount_t *);
557 extern void	xfs_do_force_shutdown(bhv_desc_t *, int, char *, int);
558 extern int	xfs_syncsub(xfs_mount_t *, int, int, int *);
559 extern int	xfs_sync_inodes(xfs_mount_t *, int, int, int *);
560 extern xfs_agnumber_t	xfs_initialize_perag(struct vfs *, xfs_mount_t *,
561 						xfs_agnumber_t);
562 extern void	xfs_xlatesb(void *, struct xfs_sb *, int, __int64_t);
563 
564 extern struct xfs_dmops xfs_dmcore_stub;
565 extern struct xfs_qmops xfs_qmcore_stub;
566 extern struct xfs_ioops xfs_iocore_xfs;
567 
568 extern int	xfs_init(void);
569 extern void	xfs_cleanup(void);
570 
571 #endif	/* __KERNEL__ */
572 
573 #endif	/* __XFS_MOUNT_H__ */
574