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Dave Chinner0b61f8a2018-06-05 19:42:14 -07001// SPDX-License-Identifier: GPL-2.0
Linus Torvalds1da177e2005-04-16 15:20:36 -07002/*
Olaf Weber3e57ecf2006-06-09 14:48:12 +10003 * Copyright (c) 2000-2006 Silicon Graphics, Inc.
Nathan Scott7b718762005-11-02 14:58:39 +11004 * All Rights Reserved.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005 */
6#ifndef __XFS_BMAP_H__
7#define __XFS_BMAP_H__
8
9struct getbmap;
10struct xfs_bmbt_irec;
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +110011struct xfs_ifork;
Linus Torvalds1da177e2005-04-16 15:20:36 -070012struct xfs_inode;
13struct xfs_mount;
14struct xfs_trans;
15
David Chinnera8272ce2007-11-23 16:28:09 +110016extern kmem_zone_t *xfs_bmap_free_item_zone;
17
Linus Torvalds1da177e2005-04-16 15:20:36 -070018/*
Dave Chinner9799b432015-01-09 10:46:49 +110019 * Argument structure for xfs_bmap_alloc.
20 */
21struct xfs_bmalloca {
Dave Chinner9799b432015-01-09 10:46:49 +110022 struct xfs_trans *tp; /* transaction pointer */
23 struct xfs_inode *ip; /* incore inode pointer */
24 struct xfs_bmbt_irec prev; /* extent before the new one */
25 struct xfs_bmbt_irec got; /* extent after, or delayed */
26
27 xfs_fileoff_t offset; /* offset in file filling in */
28 xfs_extlen_t length; /* i/o length asked/allocated */
29 xfs_fsblock_t blkno; /* starting block of new extent */
30
31 struct xfs_btree_cur *cur; /* btree cursor */
Christoph Hellwigb2b17122017-11-03 10:34:43 -070032 struct xfs_iext_cursor icur; /* incore extent cursor */
Dave Chinner9799b432015-01-09 10:46:49 +110033 int nallocs;/* number of extents alloc'd */
34 int logflags;/* flags for transaction logging */
35
36 xfs_extlen_t total; /* total blocks needed for xaction */
37 xfs_extlen_t minlen; /* minimum allocation size (blocks) */
38 xfs_extlen_t minleft; /* amount must be left after alloc */
39 bool eof; /* set if allocating past last extent */
40 bool wasdel; /* replacing a delayed allocation */
Dave Chinner9799b432015-01-09 10:46:49 +110041 bool aeof; /* allocated space at eof */
42 bool conv; /* overwriting unwritten extents */
Dave Chinner292378e2016-09-26 08:21:28 +100043 int datatype;/* data type being allocated */
Dave Chinner9799b432015-01-09 10:46:49 +110044 int flags;
45};
46
47/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070048 * List of extents to be free "later".
49 * The list is kept sorted on xbf_startblock.
50 */
Darrick J. Wong310a75a2016-08-03 11:18:10 +100051struct xfs_extent_free_item
Linus Torvalds1da177e2005-04-16 15:20:36 -070052{
Darrick J. Wong310a75a2016-08-03 11:18:10 +100053 xfs_fsblock_t xefi_startblock;/* starting fs block number */
54 xfs_extlen_t xefi_blockcount;/* number of blocks in extent */
55 struct list_head xefi_list;
Darrick J. Wong340785c2016-08-03 11:33:42 +100056 struct xfs_owner_info xefi_oinfo; /* extent owner */
Brian Fosterfcb762f2018-05-09 08:45:04 -070057 bool xefi_skip_discard;
Darrick J. Wonge66a4c62016-06-21 11:53:28 +100058};
Linus Torvalds1da177e2005-04-16 15:20:36 -070059
Linus Torvalds1da177e2005-04-16 15:20:36 -070060#define XFS_BMAP_MAX_NMAP 4
61
62/*
Dave Chinnerc0dc7822011-09-18 20:40:52 +000063 * Flags for xfs_bmapi_*
Linus Torvalds1da177e2005-04-16 15:20:36 -070064 */
Dave Chinnerc0dc7822011-09-18 20:40:52 +000065#define XFS_BMAPI_ENTIRE 0x001 /* return entire extent, not trimmed */
66#define XFS_BMAPI_METADATA 0x002 /* mapping metadata not user data */
67#define XFS_BMAPI_ATTRFORK 0x004 /* use attribute fork not data */
68#define XFS_BMAPI_PREALLOC 0x008 /* preallocation op: unwritten space */
Dave Chinnerc0dc7822011-09-18 20:40:52 +000069#define XFS_BMAPI_CONTIG 0x020 /* must allocate only one extent */
Dave Chinner44722352010-08-24 12:02:11 +100070/*
71 * unwritten extent conversion - this needs write cache flushing and no additional
72 * allocation alignments. When specified with XFS_BMAPI_PREALLOC it converts
73 * from written to unwritten, otherwise convert from unwritten to written.
74 */
Dave Chinnerc0dc7822011-09-18 20:40:52 +000075#define XFS_BMAPI_CONVERT 0x040
Linus Torvalds1da177e2005-04-16 15:20:36 -070076
Dave Chinner3fbbbea2015-11-03 12:27:22 +110077/*
78 * allocate zeroed extents - this requires all newly allocated user data extents
79 * to be initialised to zero. It will be ignored if XFS_BMAPI_METADATA is set.
80 * Use in conjunction with XFS_BMAPI_CONVERT to convert unwritten extents found
81 * during the allocation range to zeroed written extents.
82 */
83#define XFS_BMAPI_ZERO 0x080
84
Darrick J. Wongf65306e2016-10-03 09:11:27 -070085/*
86 * Map the inode offset to the block given in ap->firstblock. Primarily
87 * used for reflink. The range must be in a hole, and this flag cannot be
88 * turned on with PREALLOC or CONVERT, and cannot be used on the attr fork.
Darrick J. Wong4847acf2016-10-03 09:11:27 -070089 *
90 * For bunmapi, this flag unmaps the range without adjusting quota, reducing
91 * refcount, or freeing the blocks.
Darrick J. Wongf65306e2016-10-03 09:11:27 -070092 */
93#define XFS_BMAPI_REMAP 0x100
94
Darrick J. Wong3993bae2016-10-03 09:11:32 -070095/* Map something in the CoW fork. */
96#define XFS_BMAPI_COWFORK 0x200
97
Brian Fosterfcb762f2018-05-09 08:45:04 -070098/* Skip online discard of freed extents */
99#define XFS_BMAPI_NODISCARD 0x1000
100
Darrick J. Wong95eb3082018-05-09 10:02:32 -0700101/* Do not update the rmap btree. Used for reconstructing bmbt from rmapbt. */
102#define XFS_BMAPI_NORMAP 0x2000
103
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000104#define XFS_BMAPI_FLAGS \
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000105 { XFS_BMAPI_ENTIRE, "ENTIRE" }, \
106 { XFS_BMAPI_METADATA, "METADATA" }, \
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000107 { XFS_BMAPI_ATTRFORK, "ATTRFORK" }, \
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000108 { XFS_BMAPI_PREALLOC, "PREALLOC" }, \
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000109 { XFS_BMAPI_CONTIG, "CONTIG" }, \
Dave Chinner3fbbbea2015-11-03 12:27:22 +1100110 { XFS_BMAPI_CONVERT, "CONVERT" }, \
Darrick J. Wongf65306e2016-10-03 09:11:27 -0700111 { XFS_BMAPI_ZERO, "ZERO" }, \
Darrick J. Wong3993bae2016-10-03 09:11:32 -0700112 { XFS_BMAPI_REMAP, "REMAP" }, \
Christoph Hellwigd2b39642017-01-20 09:31:54 -0800113 { XFS_BMAPI_COWFORK, "COWFORK" }, \
Darrick J. Wong95eb3082018-05-09 10:02:32 -0700114 { XFS_BMAPI_NODISCARD, "NODISCARD" }, \
115 { XFS_BMAPI_NORMAP, "NORMAP" }
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000116
117
Nathan Scotta844f452005-11-02 14:38:42 +1100118static inline int xfs_bmapi_aflag(int w)
119{
Darrick J. Wong3993bae2016-10-03 09:11:32 -0700120 return (w == XFS_ATTR_FORK ? XFS_BMAPI_ATTRFORK :
121 (w == XFS_COW_FORK ? XFS_BMAPI_COWFORK : 0));
122}
123
124static inline int xfs_bmapi_whichfork(int bmapi_flags)
125{
126 if (bmapi_flags & XFS_BMAPI_COWFORK)
127 return XFS_COW_FORK;
128 else if (bmapi_flags & XFS_BMAPI_ATTRFORK)
129 return XFS_ATTR_FORK;
130 return XFS_DATA_FORK;
Nathan Scotta844f452005-11-02 14:38:42 +1100131}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132
133/*
134 * Special values for xfs_bmbt_irec_t br_startblock field.
135 */
136#define DELAYSTARTBLOCK ((xfs_fsblock_t)-1LL)
137#define HOLESTARTBLOCK ((xfs_fsblock_t)-2LL)
138
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139/*
Christoph Hellwig7574aa92009-11-25 00:00:19 +0000140 * Flags for xfs_bmap_add_extent*.
141 */
142#define BMAP_LEFT_CONTIG (1 << 0)
143#define BMAP_RIGHT_CONTIG (1 << 1)
144#define BMAP_LEFT_FILLING (1 << 2)
145#define BMAP_RIGHT_FILLING (1 << 3)
146#define BMAP_LEFT_DELAY (1 << 4)
147#define BMAP_RIGHT_DELAY (1 << 5)
148#define BMAP_LEFT_VALID (1 << 6)
149#define BMAP_RIGHT_VALID (1 << 7)
Christoph Hellwig6ef35542009-11-25 00:00:21 +0000150#define BMAP_ATTRFORK (1 << 8)
Darrick J. Wong3993bae2016-10-03 09:11:32 -0700151#define BMAP_COWFORK (1 << 9)
Christoph Hellwig7574aa92009-11-25 00:00:19 +0000152
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000153#define XFS_BMAP_EXT_FLAGS \
154 { BMAP_LEFT_CONTIG, "LC" }, \
155 { BMAP_RIGHT_CONTIG, "RC" }, \
156 { BMAP_LEFT_FILLING, "LF" }, \
157 { BMAP_RIGHT_FILLING, "RF" }, \
Darrick J. Wong3993bae2016-10-03 09:11:32 -0700158 { BMAP_ATTRFORK, "ATTR" }, \
159 { BMAP_COWFORK, "COW" }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160
Namjae Jeone1d8fb82014-02-24 10:58:19 +1100161
162/*
Christoph Hellwig9c4f29d2017-03-28 14:53:35 -0700163 * Return true if the extent is a real, allocated extent, or false if it is a
164 * delayed allocation, and unwritten extent or a hole.
165 */
166static inline bool xfs_bmap_is_real_extent(struct xfs_bmbt_irec *irec)
167{
168 return irec->br_state != XFS_EXT_UNWRITTEN &&
169 irec->br_startblock != HOLESTARTBLOCK &&
170 irec->br_startblock != DELAYSTARTBLOCK &&
171 !isnullstartblock(irec->br_startblock);
172}
173
Darrick J. Wong0a0af282016-10-20 15:51:50 +1100174void xfs_trim_extent(struct xfs_bmbt_irec *irec, xfs_fileoff_t bno,
175 xfs_filblks_t len);
Christoph Hellwigd952e2f2011-09-18 20:41:07 +0000176int xfs_bmap_add_attrfork(struct xfs_inode *ip, int size, int rsvd);
Allison Henderson2f3cd802018-10-18 17:21:16 +1100177int xfs_bmap_set_attrforkoff(struct xfs_inode *ip, int size, int *version);
Dave Chinnerf3508bc2013-07-10 07:04:00 +1000178void xfs_bmap_local_to_extents_empty(struct xfs_inode *ip, int whichfork);
Brian Foster0f37d172018-08-01 07:20:34 -0700179void __xfs_bmap_add_free(struct xfs_trans *tp, xfs_fsblock_t bno,
Darrick J. Wong66e32372018-12-12 08:46:23 -0800180 xfs_filblks_t len, const struct xfs_owner_info *oinfo,
Brian Foster0f37d172018-08-01 07:20:34 -0700181 bool skip_discard);
Christoph Hellwigd952e2f2011-09-18 20:41:07 +0000182void xfs_bmap_compute_maxlevels(struct xfs_mount *mp, int whichfork);
183int xfs_bmap_first_unused(struct xfs_trans *tp, struct xfs_inode *ip,
184 xfs_extlen_t len, xfs_fileoff_t *unused, int whichfork);
185int xfs_bmap_last_before(struct xfs_trans *tp, struct xfs_inode *ip,
186 xfs_fileoff_t *last_block, int whichfork);
Eric Sandeen7fb2cd42014-04-14 18:58:05 +1000187int xfs_bmap_last_offset(struct xfs_inode *ip, xfs_fileoff_t *unused,
188 int whichfork);
Christoph Hellwigd952e2f2011-09-18 20:41:07 +0000189int xfs_bmap_one_block(struct xfs_inode *ip, int whichfork);
Dave Chinner5c8ed202011-09-18 20:40:45 +0000190int xfs_bmapi_read(struct xfs_inode *ip, xfs_fileoff_t bno,
191 xfs_filblks_t len, struct xfs_bmbt_irec *mval,
192 int *nmap, int flags);
Dave Chinnerc0dc7822011-09-18 20:40:52 +0000193int xfs_bmapi_write(struct xfs_trans *tp, struct xfs_inode *ip,
194 xfs_fileoff_t bno, xfs_filblks_t len, int flags,
Brian Fostera7beabe2018-07-11 22:26:25 -0700195 xfs_extlen_t total, struct xfs_bmbt_irec *mval, int *nmap);
Darrick J. Wong44535932016-10-03 09:11:29 -0700196int __xfs_bunmapi(struct xfs_trans *tp, struct xfs_inode *ip,
197 xfs_fileoff_t bno, xfs_filblks_t *rlen, int flags,
Brian Foster2af52842018-07-11 22:26:25 -0700198 xfs_extnum_t nexts);
Christoph Hellwigd952e2f2011-09-18 20:41:07 +0000199int xfs_bunmapi(struct xfs_trans *tp, struct xfs_inode *ip,
200 xfs_fileoff_t bno, xfs_filblks_t len, int flags,
Brian Foster2af52842018-07-11 22:26:25 -0700201 xfs_extnum_t nexts, int *done);
Christoph Hellwigfa5c8362016-10-20 15:54:14 +1100202int xfs_bmap_del_extent_delay(struct xfs_inode *ip, int whichfork,
Christoph Hellwigb2b17122017-11-03 10:34:43 -0700203 struct xfs_iext_cursor *cur, struct xfs_bmbt_irec *got,
Christoph Hellwigfa5c8362016-10-20 15:54:14 +1100204 struct xfs_bmbt_irec *del);
Christoph Hellwigb2b17122017-11-03 10:34:43 -0700205void xfs_bmap_del_extent_cow(struct xfs_inode *ip,
206 struct xfs_iext_cursor *cur, struct xfs_bmbt_irec *got,
207 struct xfs_bmbt_irec *del);
Christoph Hellwigd952e2f2011-09-18 20:41:07 +0000208uint xfs_default_attroffset(struct xfs_inode *ip);
Christoph Hellwigecfea3f2017-10-19 11:07:11 -0700209int xfs_bmap_collapse_extents(struct xfs_trans *tp, struct xfs_inode *ip,
Namjae Jeona904b1c2015-03-25 15:08:56 +1100210 xfs_fileoff_t *next_fsb, xfs_fileoff_t offset_shift_fsb,
Brian Foster333f9502018-07-11 22:26:27 -0700211 bool *done);
Darrick J. Wongf62cb482018-06-21 23:26:57 -0700212int xfs_bmap_can_insert_extents(struct xfs_inode *ip, xfs_fileoff_t off,
213 xfs_fileoff_t shift);
Christoph Hellwigecfea3f2017-10-19 11:07:11 -0700214int xfs_bmap_insert_extents(struct xfs_trans *tp, struct xfs_inode *ip,
215 xfs_fileoff_t *next_fsb, xfs_fileoff_t offset_shift_fsb,
Brian Foster333f9502018-07-11 22:26:27 -0700216 bool *done, xfs_fileoff_t stop_fsb);
Namjae Jeona904b1c2015-03-25 15:08:56 +1100217int xfs_bmap_split_extent(struct xfs_inode *ip, xfs_fileoff_t split_offset);
Darrick J. Wongbe51f812016-10-03 09:11:32 -0700218int xfs_bmapi_reserve_delalloc(struct xfs_inode *ip, int whichfork,
Brian Foster974ae922016-11-28 14:57:42 +1100219 xfs_fileoff_t off, xfs_filblks_t len, xfs_filblks_t prealloc,
Christoph Hellwigb2b17122017-11-03 10:34:43 -0700220 struct xfs_bmbt_irec *got, struct xfs_iext_cursor *cur,
221 int eof);
Christoph Hellwig491ce612019-02-15 08:02:49 -0800222int xfs_bmapi_convert_delalloc(struct xfs_inode *ip, int whichfork,
223 xfs_fileoff_t offset_fsb, struct xfs_bmbt_irec *imap,
224 unsigned int *seq);
Christoph Hellwig26b91c72019-02-18 09:38:48 -0800225int xfs_bmap_add_extent_unwritten_real(struct xfs_trans *tp,
226 struct xfs_inode *ip, int whichfork,
227 struct xfs_iext_cursor *icur, struct xfs_btree_cur **curp,
228 struct xfs_bmbt_irec *new, int *logflagsp);
Christoph Hellwig1a5902c2009-03-29 19:26:46 +0200229
Brian Fosterfcb762f2018-05-09 08:45:04 -0700230static inline void
231xfs_bmap_add_free(
Brian Foster0f37d172018-08-01 07:20:34 -0700232 struct xfs_trans *tp,
Brian Fosterfcb762f2018-05-09 08:45:04 -0700233 xfs_fsblock_t bno,
234 xfs_filblks_t len,
Darrick J. Wong66e32372018-12-12 08:46:23 -0800235 const struct xfs_owner_info *oinfo)
Brian Fosterfcb762f2018-05-09 08:45:04 -0700236{
Brian Foster0f37d172018-08-01 07:20:34 -0700237 __xfs_bmap_add_free(tp, bno, len, oinfo, false);
Brian Fosterfcb762f2018-05-09 08:45:04 -0700238}
239
Darrick J. Wong77d61fe2016-10-03 09:11:26 -0700240enum xfs_bmap_intent_type {
241 XFS_BMAP_MAP = 1,
242 XFS_BMAP_UNMAP,
243};
244
245struct xfs_bmap_intent {
246 struct list_head bi_list;
247 enum xfs_bmap_intent_type bi_type;
248 struct xfs_inode *bi_owner;
249 int bi_whichfork;
250 struct xfs_bmbt_irec bi_bmap;
251};
252
Brian Foster7dbddba2018-08-01 07:20:32 -0700253int xfs_bmap_finish_one(struct xfs_trans *tp, struct xfs_inode *ip,
254 enum xfs_bmap_intent_type type, int whichfork,
255 xfs_fileoff_t startoff, xfs_fsblock_t startblock,
Darrick J. Wonge1a4e372017-06-14 21:25:57 -0700256 xfs_filblks_t *blockcount, xfs_exntst_t state);
Brian Foster0f37d172018-08-01 07:20:34 -0700257int xfs_bmap_map_extent(struct xfs_trans *tp, struct xfs_inode *ip,
258 struct xfs_bmbt_irec *imap);
259int xfs_bmap_unmap_extent(struct xfs_trans *tp, struct xfs_inode *ip,
260 struct xfs_bmbt_irec *imap);
Darrick J. Wong9f3afb52016-10-03 09:11:28 -0700261
Christoph Hellwig060ea652017-10-19 11:02:29 -0700262static inline int xfs_bmap_fork_to_state(int whichfork)
263{
264 switch (whichfork) {
265 case XFS_ATTR_FORK:
266 return BMAP_ATTRFORK;
267 case XFS_COW_FORK:
268 return BMAP_COWFORK;
269 default:
270 return 0;
271 }
272}
273
Darrick J. Wong30b09842018-03-23 10:06:52 -0700274xfs_failaddr_t xfs_bmap_validate_extent(struct xfs_inode *ip, int whichfork,
275 struct xfs_bmbt_irec *irec);
276
Darrick J. Wong7cf199b2018-05-14 06:34:34 -0700277int xfs_bmapi_remap(struct xfs_trans *tp, struct xfs_inode *ip,
278 xfs_fileoff_t bno, xfs_filblks_t len, xfs_fsblock_t startblock,
Brian Fosterff3edf22018-07-11 22:26:14 -0700279 int flags);
Darrick J. Wong7cf199b2018-05-14 06:34:34 -0700280
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281#endif /* __XFS_BMAP_H__ */