| fs.h (7eaceaccab5f40bbfda044629a6298616aeaed50) | fs.h (721a9602e6607417c6bc15b18e97a2f35266c690) |
|---|---|
| 1#ifndef _LINUX_FS_H 2#define _LINUX_FS_H 3 4/* 5 * This file has definitions for some important file table 6 * structures etc. 7 */ 8 --- 121 unchanged lines hidden (view full) --- 130 * READ A normal read operation. Device will be plugged. 131 * READ_SYNC A synchronous read. Device is not plugged, caller can 132 * immediately wait on this read without caring about 133 * unplugging. 134 * READA Used for read-ahead operations. Lower priority, and the 135 * block layer could (in theory) choose to ignore this 136 * request if it runs into resource problems. 137 * WRITE A normal async write. Device will be plugged. | 1#ifndef _LINUX_FS_H 2#define _LINUX_FS_H 3 4/* 5 * This file has definitions for some important file table 6 * structures etc. 7 */ 8 --- 121 unchanged lines hidden (view full) --- 130 * READ A normal read operation. Device will be plugged. 131 * READ_SYNC A synchronous read. Device is not plugged, caller can 132 * immediately wait on this read without caring about 133 * unplugging. 134 * READA Used for read-ahead operations. Lower priority, and the 135 * block layer could (in theory) choose to ignore this 136 * request if it runs into resource problems. 137 * WRITE A normal async write. Device will be plugged. |
| 138 * WRITE_SYNC_PLUG Synchronous write. Identical to WRITE, but passes down | 138 * WRITE_SYNC Synchronous write. Identical to WRITE, but passes down |
| 139 * the hint that someone will be waiting on this IO | 139 * the hint that someone will be waiting on this IO |
| 140 * shortly. The device must still be unplugged explicitly, 141 * WRITE_SYNC_PLUG does not do this as we could be 142 * submitting more writes before we actually wait on any 143 * of them. 144 * WRITE_SYNC Like WRITE_SYNC_PLUG, but also unplugs the device 145 * immediately after submission. The write equivalent 146 * of READ_SYNC. 147 * WRITE_ODIRECT_PLUG Special case write for O_DIRECT only. | 140 * shortly. The write equivalent of READ_SYNC. 141 * WRITE_ODIRECT Special case write for O_DIRECT only. |
| 148 * WRITE_FLUSH Like WRITE_SYNC but with preceding cache flush. 149 * WRITE_FUA Like WRITE_SYNC but data is guaranteed to be on 150 * non-volatile media on completion. 151 * WRITE_FLUSH_FUA Combination of WRITE_FLUSH and FUA. The IO is preceded 152 * by a cache flush and data is guaranteed to be on 153 * non-volatile media on completion. 154 * 155 */ 156#define RW_MASK REQ_WRITE 157#define RWA_MASK REQ_RAHEAD 158 159#define READ 0 160#define WRITE RW_MASK 161#define READA RWA_MASK 162 | 142 * WRITE_FLUSH Like WRITE_SYNC but with preceding cache flush. 143 * WRITE_FUA Like WRITE_SYNC but data is guaranteed to be on 144 * non-volatile media on completion. 145 * WRITE_FLUSH_FUA Combination of WRITE_FLUSH and FUA. The IO is preceded 146 * by a cache flush and data is guaranteed to be on 147 * non-volatile media on completion. 148 * 149 */ 150#define RW_MASK REQ_WRITE 151#define RWA_MASK REQ_RAHEAD 152 153#define READ 0 154#define WRITE RW_MASK 155#define READA RWA_MASK 156 |
| 163#define READ_SYNC (READ | REQ_SYNC | REQ_UNPLUG) | 157#define READ_SYNC (READ | REQ_SYNC) |
| 164#define READ_META (READ | REQ_META) | 158#define READ_META (READ | REQ_META) |
| 165#define WRITE_SYNC_PLUG (WRITE | REQ_SYNC | REQ_NOIDLE) 166#define WRITE_SYNC (WRITE | REQ_SYNC | REQ_NOIDLE | REQ_UNPLUG) 167#define WRITE_ODIRECT_PLUG (WRITE | REQ_SYNC) | 159#define WRITE_SYNC (WRITE | REQ_SYNC | REQ_NOIDLE) 160#define WRITE_ODIRECT (WRITE | REQ_SYNC) |
| 168#define WRITE_META (WRITE | REQ_META) | 161#define WRITE_META (WRITE | REQ_META) |
| 169#define WRITE_FLUSH (WRITE | REQ_SYNC | REQ_NOIDLE | REQ_UNPLUG | \ 170 REQ_FLUSH) 171#define WRITE_FUA (WRITE | REQ_SYNC | REQ_NOIDLE | REQ_UNPLUG | \ 172 REQ_FUA) 173#define WRITE_FLUSH_FUA (WRITE | REQ_SYNC | REQ_NOIDLE | REQ_UNPLUG | \ 174 REQ_FLUSH | REQ_FUA) | 162#define WRITE_FLUSH (WRITE | REQ_SYNC | REQ_NOIDLE | REQ_FLUSH) 163#define WRITE_FUA (WRITE | REQ_SYNC | REQ_NOIDLE | REQ_FUA) 164#define WRITE_FLUSH_FUA (WRITE | REQ_SYNC | REQ_NOIDLE | REQ_FLUSH | REQ_FUA) |
| 175 176#define SEL_IN 1 177#define SEL_OUT 2 178#define SEL_EX 4 179 180/* public flags for file_system_type */ 181#define FS_REQUIRES_DEV 1 182#define FS_BINARY_MOUNTDATA 2 --- 2383 unchanged lines hidden --- | 165 166#define SEL_IN 1 167#define SEL_OUT 2 168#define SEL_EX 4 169 170/* public flags for file_system_type */ 171#define FS_REQUIRES_DEV 1 172#define FS_BINARY_MOUNTDATA 2 --- 2383 unchanged lines hidden --- |