Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 2 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. |
| 3 | * All Rights Reserved. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 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 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * published by the Free Software Foundation. |
| 8 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 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. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 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 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #ifndef __XFS_BUF_H__ |
| 19 | #define __XFS_BUF_H__ |
| 20 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | #include <linux/list.h> |
| 22 | #include <linux/types.h> |
| 23 | #include <linux/spinlock.h> |
| 24 | #include <asm/system.h> |
| 25 | #include <linux/mm.h> |
| 26 | #include <linux/fs.h> |
| 27 | #include <linux/buffer_head.h> |
| 28 | #include <linux/uio.h> |
| 29 | |
| 30 | /* |
| 31 | * Base types |
| 32 | */ |
| 33 | |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 34 | #define XFS_BUF_DADDR_NULL ((xfs_daddr_t) (-1LL)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 36 | #define xfs_buf_ctob(pp) ((pp) * PAGE_CACHE_SIZE) |
| 37 | #define xfs_buf_btoc(dd) (((dd) + PAGE_CACHE_SIZE-1) >> PAGE_CACHE_SHIFT) |
| 38 | #define xfs_buf_btoct(dd) ((dd) >> PAGE_CACHE_SHIFT) |
| 39 | #define xfs_buf_poff(aa) ((aa) & ~PAGE_CACHE_MASK) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 41 | typedef enum { |
| 42 | XBRW_READ = 1, /* transfer into target memory */ |
| 43 | XBRW_WRITE = 2, /* transfer from target memory */ |
| 44 | XBRW_ZERO = 3, /* Zero target memory */ |
| 45 | } xfs_buf_rw_t; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | |
Christoph Hellwig | 807cbbd | 2010-06-24 11:49:12 +1000 | [diff] [blame] | 47 | #define XBF_READ (1 << 0) /* buffer intended for reading from device */ |
| 48 | #define XBF_WRITE (1 << 1) /* buffer intended for writing to device */ |
| 49 | #define XBF_MAPPED (1 << 2) /* buffer mapped (b_addr valid) */ |
| 50 | #define XBF_ASYNC (1 << 4) /* initiator will not wait for completion */ |
| 51 | #define XBF_DONE (1 << 5) /* all pages in the buffer uptodate */ |
| 52 | #define XBF_DELWRI (1 << 6) /* buffer has dirty pages */ |
| 53 | #define XBF_STALE (1 << 7) /* buffer has been staled, do not find it */ |
| 54 | #define XBF_FS_MANAGED (1 << 8) /* filesystem controls freeing memory */ |
| 55 | #define XBF_ORDERED (1 << 11)/* use ordered writes */ |
| 56 | #define XBF_READ_AHEAD (1 << 12)/* asynchronous read-ahead */ |
| 57 | #define XBF_LOG_BUFFER (1 << 13)/* this is a buffer used for the log */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | |
Christoph Hellwig | 807cbbd | 2010-06-24 11:49:12 +1000 | [diff] [blame] | 59 | /* flags used only as arguments to access routines */ |
| 60 | #define XBF_LOCK (1 << 14)/* lock requested */ |
| 61 | #define XBF_TRYLOCK (1 << 15)/* lock requested, but do not wait */ |
| 62 | #define XBF_DONT_BLOCK (1 << 16)/* do not block in current thread */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | |
Christoph Hellwig | 807cbbd | 2010-06-24 11:49:12 +1000 | [diff] [blame] | 64 | /* flags used only internally */ |
| 65 | #define _XBF_PAGE_CACHE (1 << 17)/* backed by pagecache */ |
| 66 | #define _XBF_PAGES (1 << 18)/* backed by refcounted pages */ |
| 67 | #define _XBF_RUN_QUEUES (1 << 19)/* run block device task queue */ |
| 68 | #define _XBF_DELWRI_Q (1 << 21)/* buffer on delwri queue */ |
Christoph Hellwig | 6ab455e | 2008-05-19 16:34:42 +1000 | [diff] [blame] | 69 | |
Christoph Hellwig | 807cbbd | 2010-06-24 11:49:12 +1000 | [diff] [blame] | 70 | /* |
| 71 | * Special flag for supporting metadata blocks smaller than a FSB. |
| 72 | * |
| 73 | * In this case we can have multiple xfs_buf_t on a single page and |
| 74 | * need to lock out concurrent xfs_buf_t readers as they only |
| 75 | * serialise access to the buffer. |
| 76 | * |
| 77 | * If the FSB size >= PAGE_CACHE_SIZE case, we have no serialisation |
| 78 | * between reads of the page. Hence we can have one thread read the |
| 79 | * page and modify it, but then race with another thread that thinks |
| 80 | * the page is not up-to-date and hence reads it again. |
| 81 | * |
| 82 | * The result is that the first modifcation to the page is lost. |
| 83 | * This sort of AGF/AGI reading race can happen when unlinking inodes |
| 84 | * that require truncation and results in the AGI unlinked list |
| 85 | * modifications being lost. |
| 86 | */ |
| 87 | #define _XBF_PAGE_LOCKED (1 << 22) |
Christoph Hellwig | 73f6aa4 | 2008-10-10 17:28:29 +1100 | [diff] [blame] | 88 | |
Christoph Hellwig | 807cbbd | 2010-06-24 11:49:12 +1000 | [diff] [blame] | 89 | /* |
| 90 | * If we try a barrier write, but it fails we have to communicate |
| 91 | * this to the upper layers. Unfortunately b_error gets overwritten |
| 92 | * when the buffer is re-issued so we have to add another flag to |
| 93 | * keep this information. |
| 94 | */ |
| 95 | #define _XFS_BARRIER_FAILED (1 << 23) |
| 96 | |
| 97 | typedef unsigned int xfs_buf_flags_t; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 99 | #define XFS_BUF_FLAGS \ |
| 100 | { XBF_READ, "READ" }, \ |
| 101 | { XBF_WRITE, "WRITE" }, \ |
| 102 | { XBF_MAPPED, "MAPPED" }, \ |
| 103 | { XBF_ASYNC, "ASYNC" }, \ |
| 104 | { XBF_DONE, "DONE" }, \ |
| 105 | { XBF_DELWRI, "DELWRI" }, \ |
| 106 | { XBF_STALE, "STALE" }, \ |
| 107 | { XBF_FS_MANAGED, "FS_MANAGED" }, \ |
| 108 | { XBF_ORDERED, "ORDERED" }, \ |
| 109 | { XBF_READ_AHEAD, "READ_AHEAD" }, \ |
| 110 | { XBF_LOCK, "LOCK" }, /* should never be set */\ |
| 111 | { XBF_TRYLOCK, "TRYLOCK" }, /* ditto */\ |
| 112 | { XBF_DONT_BLOCK, "DONT_BLOCK" }, /* ditto */\ |
| 113 | { _XBF_PAGE_CACHE, "PAGE_CACHE" }, \ |
| 114 | { _XBF_PAGES, "PAGES" }, \ |
| 115 | { _XBF_RUN_QUEUES, "RUN_QUEUES" }, \ |
| 116 | { _XBF_DELWRI_Q, "DELWRI_Q" }, \ |
| 117 | { _XBF_PAGE_LOCKED, "PAGE_LOCKED" }, \ |
| 118 | { _XFS_BARRIER_FAILED, "BARRIER_FAILED" } |
| 119 | |
| 120 | |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 121 | typedef enum { |
David Chinner | 5e6a07d | 2007-02-10 18:34:49 +1100 | [diff] [blame] | 122 | XBT_FORCE_SLEEP = 0, |
| 123 | XBT_FORCE_FLUSH = 1, |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 124 | } xfs_buftarg_flags_t; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | |
| 126 | typedef struct xfs_bufhash { |
| 127 | struct list_head bh_list; |
| 128 | spinlock_t bh_lock; |
| 129 | } xfs_bufhash_t; |
| 130 | |
| 131 | typedef struct xfs_buftarg { |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 132 | dev_t bt_dev; |
| 133 | struct block_device *bt_bdev; |
| 134 | struct address_space *bt_mapping; |
| 135 | unsigned int bt_bsize; |
| 136 | unsigned int bt_sshift; |
| 137 | size_t bt_smask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 139 | /* per device buffer hash table */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | uint bt_hashshift; |
| 141 | xfs_bufhash_t *bt_hash; |
David Chinner | a6867a6 | 2006-01-11 15:37:58 +1100 | [diff] [blame] | 142 | |
| 143 | /* per device delwri queue */ |
| 144 | struct task_struct *bt_task; |
| 145 | struct list_head bt_list; |
| 146 | struct list_head bt_delwrite_queue; |
| 147 | spinlock_t bt_delwrite_lock; |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 148 | unsigned long bt_flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | } xfs_buftarg_t; |
| 150 | |
| 151 | /* |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 152 | * xfs_buf_t: Buffer structure for pagecache-based buffers |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | * |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 154 | * This buffer structure is used by the pagecache buffer management routines |
| 155 | * to refer to an assembly of pages forming a logical buffer. |
| 156 | * |
| 157 | * The buffer structure is used on a temporary basis only, and discarded when |
| 158 | * released. The real data storage is recorded in the pagecache. Buffers are |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | * hashed to the block device on which the file system resides. |
| 160 | */ |
| 161 | |
| 162 | struct xfs_buf; |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 163 | typedef void (*xfs_buf_iodone_t)(struct xfs_buf *); |
| 164 | typedef void (*xfs_buf_relse_t)(struct xfs_buf *); |
| 165 | typedef int (*xfs_buf_bdstrat_t)(struct xfs_buf *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 167 | #define XB_PAGES 2 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | |
| 169 | typedef struct xfs_buf { |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 170 | struct semaphore b_sema; /* semaphore for lockables */ |
| 171 | unsigned long b_queuetime; /* time buffer was queued */ |
| 172 | atomic_t b_pin_count; /* pin count */ |
| 173 | wait_queue_head_t b_waiters; /* unpin waiters */ |
| 174 | struct list_head b_list; |
| 175 | xfs_buf_flags_t b_flags; /* status flags */ |
| 176 | struct list_head b_hash_list; /* hash table list */ |
| 177 | xfs_bufhash_t *b_hash; /* hash table list start */ |
| 178 | xfs_buftarg_t *b_target; /* buffer target (device) */ |
| 179 | atomic_t b_hold; /* reference count */ |
| 180 | xfs_daddr_t b_bn; /* block number for I/O */ |
| 181 | xfs_off_t b_file_offset; /* offset in file */ |
| 182 | size_t b_buffer_length;/* size of buffer in bytes */ |
| 183 | size_t b_count_desired;/* desired transfer size */ |
| 184 | void *b_addr; /* virtual address of buffer */ |
| 185 | struct work_struct b_iodone_work; |
| 186 | atomic_t b_io_remaining; /* #outstanding I/O requests */ |
| 187 | xfs_buf_iodone_t b_iodone; /* I/O completion function */ |
| 188 | xfs_buf_relse_t b_relse; /* releasing function */ |
David Chinner | b4dd330 | 2008-08-13 16:36:11 +1000 | [diff] [blame] | 189 | struct completion b_iowait; /* queue for I/O waiters */ |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 190 | void *b_fspriv; |
| 191 | void *b_fspriv2; |
Christoph Hellwig | 15ac08a | 2008-12-09 04:47:30 -0500 | [diff] [blame] | 192 | struct xfs_mount *b_mount; |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 193 | unsigned short b_error; /* error code on I/O */ |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 194 | unsigned int b_page_count; /* size of page array */ |
| 195 | unsigned int b_offset; /* page offset in first page */ |
| 196 | struct page **b_pages; /* array of page pointers */ |
| 197 | struct page *b_page_array[XB_PAGES]; /* inline pages */ |
| 198 | #ifdef XFS_BUF_LOCK_TRACKING |
| 199 | int b_last_holder; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | #endif |
| 201 | } xfs_buf_t; |
| 202 | |
| 203 | |
| 204 | /* Finding and Reading Buffers */ |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 205 | extern xfs_buf_t *_xfs_buf_find(xfs_buftarg_t *, xfs_off_t, size_t, |
| 206 | xfs_buf_flags_t, xfs_buf_t *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | #define xfs_incore(buftarg,blkno,len,lockit) \ |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 208 | _xfs_buf_find(buftarg, blkno ,len, lockit, NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | |
Christoph Hellwig | 6ad112b | 2009-11-24 18:02:23 +0000 | [diff] [blame] | 210 | extern xfs_buf_t *xfs_buf_get(xfs_buftarg_t *, xfs_off_t, size_t, |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 211 | xfs_buf_flags_t); |
Christoph Hellwig | 6ad112b | 2009-11-24 18:02:23 +0000 | [diff] [blame] | 212 | extern xfs_buf_t *xfs_buf_read(xfs_buftarg_t *, xfs_off_t, size_t, |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 213 | xfs_buf_flags_t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 215 | extern xfs_buf_t *xfs_buf_get_empty(size_t, xfs_buftarg_t *); |
| 216 | extern xfs_buf_t *xfs_buf_get_noaddr(size_t, xfs_buftarg_t *); |
| 217 | extern int xfs_buf_associate_memory(xfs_buf_t *, void *, size_t); |
| 218 | extern void xfs_buf_hold(xfs_buf_t *); |
| 219 | extern void xfs_buf_readahead(xfs_buftarg_t *, xfs_off_t, size_t, |
| 220 | xfs_buf_flags_t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | |
| 222 | /* Releasing Buffers */ |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 223 | extern void xfs_buf_free(xfs_buf_t *); |
| 224 | extern void xfs_buf_rele(xfs_buf_t *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | |
| 226 | /* Locking and Unlocking Buffers */ |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 227 | extern int xfs_buf_cond_lock(xfs_buf_t *); |
| 228 | extern int xfs_buf_lock_value(xfs_buf_t *); |
| 229 | extern void xfs_buf_lock(xfs_buf_t *); |
| 230 | extern void xfs_buf_unlock(xfs_buf_t *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | |
| 232 | /* Buffer Read and Write Routines */ |
Christoph Hellwig | 64e0bc7 | 2010-01-13 22:17:58 +0000 | [diff] [blame] | 233 | extern int xfs_bwrite(struct xfs_mount *mp, struct xfs_buf *bp); |
Christoph Hellwig | 5d765b9 | 2008-12-03 12:20:26 +0100 | [diff] [blame] | 234 | extern void xfs_bdwrite(void *mp, xfs_buf_t *bp); |
Christoph Hellwig | 4e23471 | 2010-01-13 22:17:56 +0000 | [diff] [blame] | 235 | |
| 236 | extern void xfsbdstrat(struct xfs_mount *, struct xfs_buf *); |
| 237 | extern int xfs_bdstrat_cb(struct xfs_buf *); |
| 238 | |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 239 | extern void xfs_buf_ioend(xfs_buf_t *, int); |
| 240 | extern void xfs_buf_ioerror(xfs_buf_t *, int); |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 241 | extern int xfs_buf_iorequest(xfs_buf_t *); |
| 242 | extern int xfs_buf_iowait(xfs_buf_t *); |
Dave Chinner | b9c4864 | 2010-01-20 10:47:39 +1100 | [diff] [blame] | 243 | extern void xfs_buf_iomove(xfs_buf_t *, size_t, size_t, void *, |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 244 | xfs_buf_rw_t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 246 | static inline int xfs_buf_geterror(xfs_buf_t *bp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | { |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 248 | return bp ? bp->b_error : ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | } |
| 250 | |
| 251 | /* Buffer Utility Routines */ |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 252 | extern xfs_caddr_t xfs_buf_offset(xfs_buf_t *, size_t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | /* Delayed Write Buffer Routines */ |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 255 | extern void xfs_buf_delwri_dequeue(xfs_buf_t *); |
Dave Chinner | d808f61 | 2010-02-02 10:13:42 +1100 | [diff] [blame] | 256 | extern void xfs_buf_delwri_promote(xfs_buf_t *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | |
| 258 | /* Buffer Daemon Setup Routines */ |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 259 | extern int xfs_buf_init(void); |
| 260 | extern void xfs_buf_terminate(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 262 | #define xfs_buf_target_name(target) \ |
| 263 | ({ char __b[BDEVNAME_SIZE]; bdevname((target)->bt_bdev, __b); __b; }) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | |
| 265 | |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 266 | #define XFS_BUF_BFLAGS(bp) ((bp)->b_flags) |
Nathan Scott | f5faad7 | 2006-07-28 17:04:44 +1000 | [diff] [blame] | 267 | #define XFS_BUF_ZEROFLAGS(bp) ((bp)->b_flags &= \ |
| 268 | ~(XBF_READ|XBF_WRITE|XBF_ASYNC|XBF_DELWRI|XBF_ORDERED)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | |
Christoph Hellwig | 0cadda1 | 2010-01-19 09:56:44 +0000 | [diff] [blame] | 270 | #define XFS_BUF_STALE(bp) ((bp)->b_flags |= XBF_STALE) |
| 271 | #define XFS_BUF_UNSTALE(bp) ((bp)->b_flags &= ~XBF_STALE) |
| 272 | #define XFS_BUF_ISSTALE(bp) ((bp)->b_flags & XBF_STALE) |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 273 | #define XFS_BUF_SUPER_STALE(bp) do { \ |
| 274 | XFS_BUF_STALE(bp); \ |
| 275 | xfs_buf_delwri_dequeue(bp); \ |
| 276 | XFS_BUF_DONE(bp); \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | } while (0) |
| 278 | |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 279 | #define XFS_BUF_UNMANAGE(bp) ((bp)->b_flags &= ~XBF_FS_MANAGED) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 281 | #define XFS_BUF_DELAYWRITE(bp) ((bp)->b_flags |= XBF_DELWRI) |
| 282 | #define XFS_BUF_UNDELAYWRITE(bp) xfs_buf_delwri_dequeue(bp) |
| 283 | #define XFS_BUF_ISDELAYWRITE(bp) ((bp)->b_flags & XBF_DELWRI) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 285 | #define XFS_BUF_ERROR(bp,no) xfs_buf_ioerror(bp,no) |
| 286 | #define XFS_BUF_GETERROR(bp) xfs_buf_geterror(bp) |
| 287 | #define XFS_BUF_ISERROR(bp) (xfs_buf_geterror(bp) ? 1 : 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 289 | #define XFS_BUF_DONE(bp) ((bp)->b_flags |= XBF_DONE) |
| 290 | #define XFS_BUF_UNDONE(bp) ((bp)->b_flags &= ~XBF_DONE) |
| 291 | #define XFS_BUF_ISDONE(bp) ((bp)->b_flags & XBF_DONE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 293 | #define XFS_BUF_BUSY(bp) do { } while (0) |
| 294 | #define XFS_BUF_UNBUSY(bp) do { } while (0) |
| 295 | #define XFS_BUF_ISBUSY(bp) (1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 297 | #define XFS_BUF_ASYNC(bp) ((bp)->b_flags |= XBF_ASYNC) |
| 298 | #define XFS_BUF_UNASYNC(bp) ((bp)->b_flags &= ~XBF_ASYNC) |
| 299 | #define XFS_BUF_ISASYNC(bp) ((bp)->b_flags & XBF_ASYNC) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 301 | #define XFS_BUF_ORDERED(bp) ((bp)->b_flags |= XBF_ORDERED) |
| 302 | #define XFS_BUF_UNORDERED(bp) ((bp)->b_flags &= ~XBF_ORDERED) |
| 303 | #define XFS_BUF_ISORDERED(bp) ((bp)->b_flags & XBF_ORDERED) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 305 | #define XFS_BUF_HOLD(bp) xfs_buf_hold(bp) |
| 306 | #define XFS_BUF_READ(bp) ((bp)->b_flags |= XBF_READ) |
| 307 | #define XFS_BUF_UNREAD(bp) ((bp)->b_flags &= ~XBF_READ) |
| 308 | #define XFS_BUF_ISREAD(bp) ((bp)->b_flags & XBF_READ) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 310 | #define XFS_BUF_WRITE(bp) ((bp)->b_flags |= XBF_WRITE) |
| 311 | #define XFS_BUF_UNWRITE(bp) ((bp)->b_flags &= ~XBF_WRITE) |
| 312 | #define XFS_BUF_ISWRITE(bp) ((bp)->b_flags & XBF_WRITE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 314 | #define XFS_BUF_IODONE_FUNC(bp) ((bp)->b_iodone) |
| 315 | #define XFS_BUF_SET_IODONE_FUNC(bp, func) ((bp)->b_iodone = (func)) |
| 316 | #define XFS_BUF_CLR_IODONE_FUNC(bp) ((bp)->b_iodone = NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 318 | #define XFS_BUF_FSPRIVATE(bp, type) ((type)(bp)->b_fspriv) |
| 319 | #define XFS_BUF_SET_FSPRIVATE(bp, val) ((bp)->b_fspriv = (void*)(val)) |
| 320 | #define XFS_BUF_FSPRIVATE2(bp, type) ((type)(bp)->b_fspriv2) |
| 321 | #define XFS_BUF_SET_FSPRIVATE2(bp, val) ((bp)->b_fspriv2 = (void*)(val)) |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 322 | #define XFS_BUF_SET_START(bp) do { } while (0) |
| 323 | #define XFS_BUF_SET_BRELSE_FUNC(bp, func) ((bp)->b_relse = (func)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 325 | #define XFS_BUF_PTR(bp) (xfs_caddr_t)((bp)->b_addr) |
| 326 | #define XFS_BUF_SET_PTR(bp, val, cnt) xfs_buf_associate_memory(bp, val, cnt) |
| 327 | #define XFS_BUF_ADDR(bp) ((bp)->b_bn) |
| 328 | #define XFS_BUF_SET_ADDR(bp, bno) ((bp)->b_bn = (xfs_daddr_t)(bno)) |
| 329 | #define XFS_BUF_OFFSET(bp) ((bp)->b_file_offset) |
| 330 | #define XFS_BUF_SET_OFFSET(bp, off) ((bp)->b_file_offset = (off)) |
| 331 | #define XFS_BUF_COUNT(bp) ((bp)->b_count_desired) |
| 332 | #define XFS_BUF_SET_COUNT(bp, cnt) ((bp)->b_count_desired = (cnt)) |
| 333 | #define XFS_BUF_SIZE(bp) ((bp)->b_buffer_length) |
| 334 | #define XFS_BUF_SET_SIZE(bp, cnt) ((bp)->b_buffer_length = (cnt)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 336 | #define XFS_BUF_SET_VTYPE_REF(bp, type, ref) do { } while (0) |
| 337 | #define XFS_BUF_SET_VTYPE(bp, type) do { } while (0) |
| 338 | #define XFS_BUF_SET_REF(bp, ref) do { } while (0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | |
Christoph Hellwig | 4d16e92 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 340 | #define XFS_BUF_ISPINNED(bp) atomic_read(&((bp)->b_pin_count)) |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 341 | |
| 342 | #define XFS_BUF_VALUSEMA(bp) xfs_buf_lock_value(bp) |
| 343 | #define XFS_BUF_CPSEMA(bp) (xfs_buf_cond_lock(bp) == 0) |
| 344 | #define XFS_BUF_VSEMA(bp) xfs_buf_unlock(bp) |
| 345 | #define XFS_BUF_PSEMA(bp,x) xfs_buf_lock(bp) |
David Chinner | b4dd330 | 2008-08-13 16:36:11 +1000 | [diff] [blame] | 346 | #define XFS_BUF_FINISH_IOWAIT(bp) complete(&bp->b_iowait); |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 347 | |
| 348 | #define XFS_BUF_SET_TARGET(bp, target) ((bp)->b_target = (target)) |
| 349 | #define XFS_BUF_TARGET(bp) ((bp)->b_target) |
| 350 | #define XFS_BUFTARG_NAME(target) xfs_buf_target_name(target) |
| 351 | |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 352 | static inline void xfs_buf_relse(xfs_buf_t *bp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | { |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 354 | if (!bp->b_relse) |
| 355 | xfs_buf_unlock(bp); |
| 356 | xfs_buf_rele(bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | } |
| 358 | |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 359 | #define xfs_biodone(bp) xfs_buf_ioend(bp, 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 361 | #define xfs_biomove(bp, off, len, data, rw) \ |
| 362 | xfs_buf_iomove((bp), (off), (len), (data), \ |
Christoph Hellwig | 0cadda1 | 2010-01-19 09:56:44 +0000 | [diff] [blame] | 363 | ((rw) == XBF_WRITE) ? XBRW_WRITE : XBRW_READ) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 365 | #define xfs_biozero(bp, off, len) \ |
| 366 | xfs_buf_iomove((bp), (off), (len), NULL, XBRW_ZERO) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 368 | #define xfs_iowait(bp) xfs_buf_iowait(bp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | |
| 370 | #define xfs_baread(target, rablkno, ralen) \ |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 371 | xfs_buf_readahead((target), (rablkno), (ralen), XBF_DONT_BLOCK) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | |
| 373 | |
| 374 | /* |
| 375 | * Handling of buftargs. |
| 376 | */ |
Jan Engelhardt | e2a0781 | 2010-03-23 09:52:55 +1100 | [diff] [blame] | 377 | extern xfs_buftarg_t *xfs_alloc_buftarg(struct block_device *, int, const char *); |
Christoph Hellwig | c141b29 | 2009-03-03 14:48:37 -0500 | [diff] [blame] | 378 | extern void xfs_free_buftarg(struct xfs_mount *, struct xfs_buftarg *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | extern void xfs_wait_buftarg(xfs_buftarg_t *); |
| 380 | extern int xfs_setsize_buftarg(xfs_buftarg_t *, unsigned int, unsigned int); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | extern int xfs_flush_buftarg(xfs_buftarg_t *, int); |
Dave Chinner | d808f61 | 2010-02-02 10:13:42 +1100 | [diff] [blame] | 382 | |
Tim Shimmin | e6a0e9c | 2007-05-08 13:49:59 +1000 | [diff] [blame] | 383 | #ifdef CONFIG_KDB_MODULES |
| 384 | extern struct list_head *xfs_get_buftarg_list(void); |
| 385 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 387 | #define xfs_getsize_buftarg(buftarg) block_size((buftarg)->bt_bdev) |
| 388 | #define xfs_readonly_buftarg(buftarg) bdev_read_only((buftarg)->bt_bdev) |
| 389 | |
| 390 | #define xfs_binval(buftarg) xfs_flush_buftarg(buftarg, 1) |
| 391 | #define XFS_bflush(buftarg) xfs_flush_buftarg(buftarg, 1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | |
| 393 | #endif /* __XFS_BUF_H__ */ |