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1 #ifndef _LINUX_FS_H 1 #ifndef _LINUX_FS_H
2 #define _LINUX_FS_H 2 #define _LINUX_FS_H
3 3
4 /* 4 /*
5 * This file has definitions for some importan 5 * This file has definitions for some important file table
6 * structures etc. 6 * structures etc.
7 */ 7 */
8 8
9 #include <linux/limits.h> 9 #include <linux/limits.h>
10 #include <linux/ioctl.h> 10 #include <linux/ioctl.h>
11 11
12 /* 12 /*
13 * It's silly to have NR_OPEN bigger than NR_F 13 * It's silly to have NR_OPEN bigger than NR_FILE, but you can change
14 * the file limit at runtime and only root can 14 * the file limit at runtime and only root can increase the per-process
15 * nr_file rlimit, so it's safe to set up a ri 15 * nr_file rlimit, so it's safe to set up a ridiculously high absolute
16 * upper limit on files-per-process. 16 * upper limit on files-per-process.
17 * 17 *
18 * Some programs (notably those using select() 18 * Some programs (notably those using select()) may have to be
19 * recompiled to take full advantage of the ne 19 * recompiled to take full advantage of the new limits..
20 */ 20 */
21 21
22 /* Fixed constants first: */ 22 /* Fixed constants first: */
23 #undef NR_OPEN 23 #undef NR_OPEN
24 extern int sysctl_nr_open; <<
25 #define INR_OPEN 1024 /* Initial set 24 #define INR_OPEN 1024 /* Initial setting for nfile rlimits */
26 25
27 #define BLOCK_SIZE_BITS 10 26 #define BLOCK_SIZE_BITS 10
28 #define BLOCK_SIZE (1<<BLOCK_SIZE_BITS) 27 #define BLOCK_SIZE (1<<BLOCK_SIZE_BITS)
29 28
30 #define SEEK_SET 0 /* seek relati 29 #define SEEK_SET 0 /* seek relative to beginning of file */
31 #define SEEK_CUR 1 /* seek relati 30 #define SEEK_CUR 1 /* seek relative to current file position */
32 #define SEEK_END 2 /* seek relati 31 #define SEEK_END 2 /* seek relative to end of file */
33 #define SEEK_MAX SEEK_END 32 #define SEEK_MAX SEEK_END
34 33
35 /* And dynamically-tunable limits and defaults 34 /* And dynamically-tunable limits and defaults: */
36 struct files_stat_struct { 35 struct files_stat_struct {
37 int nr_files; /* read only * 36 int nr_files; /* read only */
38 int nr_free_files; /* read only * 37 int nr_free_files; /* read only */
39 int max_files; /* tunable */ 38 int max_files; /* tunable */
40 }; 39 };
41 extern struct files_stat_struct files_stat; <<
42 extern int get_max_files(void); <<
43 40
44 struct inodes_stat_t { 41 struct inodes_stat_t {
45 int nr_inodes; 42 int nr_inodes;
46 int nr_unused; 43 int nr_unused;
47 int dummy[5]; /* padding for 44 int dummy[5]; /* padding for sysctl ABI compatibility */
48 }; 45 };
49 extern struct inodes_stat_t inodes_stat; <<
50 46
51 extern int leases_enable, lease_break_time; <<
52 <<
53 #ifdef CONFIG_DNOTIFY <<
54 extern int dir_notify_enable; <<
55 #endif <<
56 47
57 #define NR_FILE 8192 /* this can well be la 48 #define NR_FILE 8192 /* this can well be larger on a larger system */
58 49
59 #define MAY_EXEC 1 50 #define MAY_EXEC 1
60 #define MAY_WRITE 2 51 #define MAY_WRITE 2
61 #define MAY_READ 4 52 #define MAY_READ 4
62 #define MAY_APPEND 8 53 #define MAY_APPEND 8
>> 54 #define MAY_ACCESS 16
>> 55 #define MAY_OPEN 32
63 56
64 #define FMODE_READ 1 !! 57 /*
65 #define FMODE_WRITE 2 !! 58 * flags in file.f_mode. Note that FMODE_READ and FMODE_WRITE must correspond
66 !! 59 * to O_WRONLY and O_RDWR via the strange trick in __dentry_open()
67 /* Internal kernel extensions */ !! 60 */
68 #define FMODE_LSEEK 4 <<
69 #define FMODE_PREAD 8 <<
70 #define FMODE_PWRITE FMODE_PREAD /* The <<
71 <<
72 /* File is being opened for execution. Primary <<
73 distributed filesystems that can use it to <<
74 behavior for cross-node execution/opening_f <<
75 #define FMODE_EXEC 16 <<
76 61
>> 62 /* file is open for reading */
>> 63 #define FMODE_READ ((__force fmode_t)1)
>> 64 /* file is open for writing */
>> 65 #define FMODE_WRITE ((__force fmode_t)2)
>> 66 /* file is seekable */
>> 67 #define FMODE_LSEEK ((__force fmode_t)4)
>> 68 /* file can be accessed using pread */
>> 69 #define FMODE_PREAD ((__force fmode_t)8)
>> 70 /* file can be accessed using pwrite */
>> 71 #define FMODE_PWRITE ((__force fmode_t)16)
>> 72 /* File is opened for execution with sys_execve / sys_uselib */
>> 73 #define FMODE_EXEC ((__force fmode_t)32)
>> 74 /* File is opened with O_NDELAY (only set for block devices) */
>> 75 #define FMODE_NDELAY ((__force fmode_t)64)
>> 76 /* File is opened with O_EXCL (only set for block devices) */
>> 77 #define FMODE_EXCL ((__force fmode_t)128)
>> 78 /* File is opened using open(.., 3, ..) and is writeable only for ioctls
>> 79 (specialy hack for floppy.c) */
>> 80 #define FMODE_WRITE_IOCTL ((__force fmode_t)256)
>> 81
>> 82 /*
>> 83 * Don't update ctime and mtime.
>> 84 *
>> 85 * Currently a special hack for the XFS open_by_handle ioctl, but we'll
>> 86 * hopefully graduate it to a proper O_CMTIME flag supported by open(2) soon.
>> 87 */
>> 88 #define FMODE_NOCMTIME ((__force fmode_t)2048)
>> 89
>> 90 /*
>> 91 * The below are the various read and write types that we support. Some of
>> 92 * them include behavioral modifiers that send information down to the
>> 93 * block layer and IO scheduler. Terminology:
>> 94 *
>> 95 * The block layer uses device plugging to defer IO a little bit, in
>> 96 * the hope that we will see more IO very shortly. This increases
>> 97 * coalescing of adjacent IO and thus reduces the number of IOs we
>> 98 * have to send to the device. It also allows for better queuing,
>> 99 * if the IO isn't mergeable. If the caller is going to be waiting
>> 100 * for the IO, then he must ensure that the device is unplugged so
>> 101 * that the IO is dispatched to the driver.
>> 102 *
>> 103 * All IO is handled async in Linux. This is fine for background
>> 104 * writes, but for reads or writes that someone waits for completion
>> 105 * on, we want to notify the block layer and IO scheduler so that they
>> 106 * know about it. That allows them to make better scheduling
>> 107 * decisions. So when the below references 'sync' and 'async', it
>> 108 * is referencing this priority hint.
>> 109 *
>> 110 * With that in mind, the available types are:
>> 111 *
>> 112 * READ A normal read operation. Device will be plugged.
>> 113 * READ_SYNC A synchronous read. Device is not plugged, caller can
>> 114 * immediately wait on this read without caring about
>> 115 * unplugging.
>> 116 * READA Used for read-ahead operations. Lower priority, and the
>> 117 * block layer could (in theory) choose to ignore this
>> 118 * request if it runs into resource problems.
>> 119 * WRITE A normal async write. Device will be plugged.
>> 120 * SWRITE Like WRITE, but a special case for ll_rw_block() that
>> 121 * tells it to lock the buffer first. Normally a buffer
>> 122 * must be locked before doing IO.
>> 123 * WRITE_SYNC_PLUG Synchronous write. Identical to WRITE, but passes down
>> 124 * the hint that someone will be waiting on this IO
>> 125 * shortly. The device must still be unplugged explicitly,
>> 126 * WRITE_SYNC_PLUG does not do this as we could be
>> 127 * submitting more writes before we actually wait on any
>> 128 * of them.
>> 129 * WRITE_SYNC Like WRITE_SYNC_PLUG, but also unplugs the device
>> 130 * immediately after submission. The write equivalent
>> 131 * of READ_SYNC.
>> 132 * WRITE_ODIRECT Special case write for O_DIRECT only.
>> 133 * SWRITE_SYNC
>> 134 * SWRITE_SYNC_PLUG Like WRITE_SYNC/WRITE_SYNC_PLUG, but locks the buffer.
>> 135 * See SWRITE.
>> 136 * WRITE_BARRIER Like WRITE, but tells the block layer that all
>> 137 * previously submitted writes must be safely on storage
>> 138 * before this one is started. Also guarantees that when
>> 139 * this write is complete, it itself is also safely on
>> 140 * storage. Prevents reordering of writes on both sides
>> 141 * of this IO.
>> 142 *
>> 143 */
77 #define RW_MASK 1 144 #define RW_MASK 1
78 #define RWA_MASK 2 145 #define RWA_MASK 2
79 #define READ 0 146 #define READ 0
80 #define WRITE 1 147 #define WRITE 1
81 #define READA 2 /* read-ahead - don't 148 #define READA 2 /* read-ahead - don't block if no resources */
82 #define SWRITE 3 /* for ll_rw_block() - 149 #define SWRITE 3 /* for ll_rw_block() - wait for buffer lock */
83 #define READ_SYNC (READ | (1 << BIO_RW_S !! 150 #define READ_SYNC (READ | (1 << BIO_RW_SYNCIO) | (1 << BIO_RW_UNPLUG))
84 #define READ_META (READ | (1 << BIO_RW_M 151 #define READ_META (READ | (1 << BIO_RW_META))
85 #define WRITE_SYNC (WRITE | (1 << BIO_RW_ !! 152 #define WRITE_SYNC_PLUG (WRITE | (1 << BIO_RW_SYNCIO) | (1 << BIO_RW_NOIDLE))
86 #define WRITE_BARRIER ((1 << BIO_RW) | (1 << !! 153 #define WRITE_SYNC (WRITE_SYNC_PLUG | (1 << BIO_RW_UNPLUG))
>> 154 #define WRITE_ODIRECT (WRITE | (1 << BIO_RW_SYNCIO) | (1 << BIO_RW_UNPLUG))
>> 155 #define SWRITE_SYNC_PLUG \
>> 156 (SWRITE | (1 << BIO_RW_SYNCIO) | (1 << BIO_RW_NOIDLE))
>> 157 #define SWRITE_SYNC (SWRITE_SYNC_PLUG | (1 << BIO_RW_UNPLUG))
>> 158 #define WRITE_BARRIER (WRITE | (1 << BIO_RW_BARRIER))
>> 159
>> 160 /*
>> 161 * These aren't really reads or writes, they pass down information about
>> 162 * parts of device that are now unused by the file system.
>> 163 */
>> 164 #define DISCARD_NOBARRIER (1 << BIO_RW_DISCARD)
>> 165 #define DISCARD_BARRIER ((1 << BIO_RW_DISCARD) | (1 << BIO_RW_BARRIER))
87 166
88 #define SEL_IN 1 167 #define SEL_IN 1
89 #define SEL_OUT 2 168 #define SEL_OUT 2
90 #define SEL_EX 4 169 #define SEL_EX 4
91 170
92 /* public flags for file_system_type */ 171 /* public flags for file_system_type */
93 #define FS_REQUIRES_DEV 1 172 #define FS_REQUIRES_DEV 1
94 #define FS_BINARY_MOUNTDATA 2 173 #define FS_BINARY_MOUNTDATA 2
95 #define FS_HAS_SUBTYPE 4 174 #define FS_HAS_SUBTYPE 4
96 #define FS_REVAL_DOT 16384 /* Check the p 175 #define FS_REVAL_DOT 16384 /* Check the paths ".", ".." for staleness */
97 #define FS_RENAME_DOES_D_MOVE 32768 /* FS 176 #define FS_RENAME_DOES_D_MOVE 32768 /* FS will handle d_move()
98 * dur 177 * during rename() internally.
99 */ 178 */
100 179
101 /* 180 /*
102 * These are the fs-independent mount-flags: u 181 * These are the fs-independent mount-flags: up to 32 flags are supported
103 */ 182 */
104 #define MS_RDONLY 1 /* Mount read- 183 #define MS_RDONLY 1 /* Mount read-only */
105 #define MS_NOSUID 2 /* Ignore suid 184 #define MS_NOSUID 2 /* Ignore suid and sgid bits */
106 #define MS_NODEV 4 /* Disallow ac 185 #define MS_NODEV 4 /* Disallow access to device special files */
107 #define MS_NOEXEC 8 /* Disallow pr 186 #define MS_NOEXEC 8 /* Disallow program execution */
108 #define MS_SYNCHRONOUS 16 /* Writes are 187 #define MS_SYNCHRONOUS 16 /* Writes are synced at once */
109 #define MS_REMOUNT 32 /* Alter flags 188 #define MS_REMOUNT 32 /* Alter flags of a mounted FS */
110 #define MS_MANDLOCK 64 /* Allow manda 189 #define MS_MANDLOCK 64 /* Allow mandatory locks on an FS */
111 #define MS_DIRSYNC 128 /* Directory m 190 #define MS_DIRSYNC 128 /* Directory modifications are synchronous */
112 #define MS_NOATIME 1024 /* Do not upda 191 #define MS_NOATIME 1024 /* Do not update access times. */
113 #define MS_NODIRATIME 2048 /* Do not upda 192 #define MS_NODIRATIME 2048 /* Do not update directory access times */
114 #define MS_BIND 4096 193 #define MS_BIND 4096
115 #define MS_MOVE 8192 194 #define MS_MOVE 8192
116 #define MS_REC 16384 195 #define MS_REC 16384
117 #define MS_VERBOSE 32768 /* War is peac 196 #define MS_VERBOSE 32768 /* War is peace. Verbosity is silence.
118 MS_VERBOSE 197 MS_VERBOSE is deprecated. */
119 #define MS_SILENT 32768 198 #define MS_SILENT 32768
120 #define MS_POSIXACL (1<<16) /* VFS does no 199 #define MS_POSIXACL (1<<16) /* VFS does not apply the umask */
121 #define MS_UNBINDABLE (1<<17) /* change to u 200 #define MS_UNBINDABLE (1<<17) /* change to unbindable */
122 #define MS_PRIVATE (1<<18) /* change to p 201 #define MS_PRIVATE (1<<18) /* change to private */
123 #define MS_SLAVE (1<<19) /* change to s 202 #define MS_SLAVE (1<<19) /* change to slave */
124 #define MS_SHARED (1<<20) /* change to s 203 #define MS_SHARED (1<<20) /* change to shared */
125 #define MS_RELATIME (1<<21) /* Update atim 204 #define MS_RELATIME (1<<21) /* Update atime relative to mtime/ctime. */
126 #define MS_KERNMOUNT (1<<22) /* this is a k 205 #define MS_KERNMOUNT (1<<22) /* this is a kern_mount call */
127 #define MS_I_VERSION (1<<23) /* Update inod 206 #define MS_I_VERSION (1<<23) /* Update inode I_version field */
>> 207 #define MS_STRICTATIME (1<<24) /* Always perform atime updates */
128 #define MS_ACTIVE (1<<30) 208 #define MS_ACTIVE (1<<30)
129 #define MS_NOUSER (1<<31) 209 #define MS_NOUSER (1<<31)
130 210
131 /* 211 /*
132 * Superblock flags that can be altered by MS_ 212 * Superblock flags that can be altered by MS_REMOUNT
133 */ 213 */
134 #define MS_RMT_MASK (MS_RDONLY|MS_SYNCHRON !! 214 #define MS_RMT_MASK (MS_RDONLY|MS_SYNCHRONOUS|MS_MANDLOCK|MS_I_VERSION)
135 215
136 /* 216 /*
137 * Old magic mount flag and mask 217 * Old magic mount flag and mask
138 */ 218 */
139 #define MS_MGC_VAL 0xC0ED0000 219 #define MS_MGC_VAL 0xC0ED0000
140 #define MS_MGC_MSK 0xffff0000 220 #define MS_MGC_MSK 0xffff0000
141 221
142 /* Inode flags - they have nothing to superblo 222 /* Inode flags - they have nothing to superblock flags now */
143 223
144 #define S_SYNC 1 /* Writes are 224 #define S_SYNC 1 /* Writes are synced at once */
145 #define S_NOATIME 2 /* Do not upda 225 #define S_NOATIME 2 /* Do not update access times */
146 #define S_APPEND 4 /* Append-only 226 #define S_APPEND 4 /* Append-only file */
147 #define S_IMMUTABLE 8 /* Immutable f 227 #define S_IMMUTABLE 8 /* Immutable file */
148 #define S_DEAD 16 /* removed, bu 228 #define S_DEAD 16 /* removed, but still open directory */
149 #define S_NOQUOTA 32 /* Inode is no 229 #define S_NOQUOTA 32 /* Inode is not counted to quota */
150 #define S_DIRSYNC 64 /* Directory m 230 #define S_DIRSYNC 64 /* Directory modifications are synchronous */
151 #define S_NOCMTIME 128 /* Do not upda 231 #define S_NOCMTIME 128 /* Do not update file c/mtime */
152 #define S_SWAPFILE 256 /* Do not trun 232 #define S_SWAPFILE 256 /* Do not truncate: swapon got its bmaps */
153 #define S_PRIVATE 512 /* Inode is fs 233 #define S_PRIVATE 512 /* Inode is fs-internal */
154 234
155 /* 235 /*
156 * Note that nosuid etc flags are inode-specif 236 * Note that nosuid etc flags are inode-specific: setting some file-system
157 * flags just means all the inodes inherit tho 237 * flags just means all the inodes inherit those flags by default. It might be
158 * possible to override it selectively if you 238 * possible to override it selectively if you really wanted to with some
159 * ioctl() that is not currently implemented. 239 * ioctl() that is not currently implemented.
160 * 240 *
161 * Exception: MS_RDONLY is always applied to t 241 * Exception: MS_RDONLY is always applied to the entire file system.
162 * 242 *
163 * Unfortunately, it is possible to change a f 243 * Unfortunately, it is possible to change a filesystems flags with it mounted
164 * with files in use. This means that all of 244 * with files in use. This means that all of the inodes will not have their
165 * i_flags updated. Hence, i_flags no longer 245 * i_flags updated. Hence, i_flags no longer inherit the superblock mount
166 * flags, so these have to be checked separate 246 * flags, so these have to be checked separately. -- rmk@arm.uk.linux.org
167 */ 247 */
168 #define __IS_FLG(inode,flg) ((inode)->i_sb->s_ 248 #define __IS_FLG(inode,flg) ((inode)->i_sb->s_flags & (flg))
169 249
170 #define IS_RDONLY(inode) ((inode)->i_sb->s_fla 250 #define IS_RDONLY(inode) ((inode)->i_sb->s_flags & MS_RDONLY)
171 #define IS_SYNC(inode) (__IS_FLG(inod 251 #define IS_SYNC(inode) (__IS_FLG(inode, MS_SYNCHRONOUS) || \
172 ((inod 252 ((inode)->i_flags & S_SYNC))
173 #define IS_DIRSYNC(inode) (__IS_FLG(inod 253 #define IS_DIRSYNC(inode) (__IS_FLG(inode, MS_SYNCHRONOUS|MS_DIRSYNC) || \
174 ((inod 254 ((inode)->i_flags & (S_SYNC|S_DIRSYNC)))
175 #define IS_MANDLOCK(inode) __IS_FLG(inode 255 #define IS_MANDLOCK(inode) __IS_FLG(inode, MS_MANDLOCK)
176 #define IS_NOATIME(inode) __IS_FLG(inode, MS 256 #define IS_NOATIME(inode) __IS_FLG(inode, MS_RDONLY|MS_NOATIME)
177 #define IS_I_VERSION(inode) __IS_FLG(inode, 257 #define IS_I_VERSION(inode) __IS_FLG(inode, MS_I_VERSION)
178 258
179 #define IS_NOQUOTA(inode) ((inode)->i_fl 259 #define IS_NOQUOTA(inode) ((inode)->i_flags & S_NOQUOTA)
180 #define IS_APPEND(inode) ((inode)->i_fl 260 #define IS_APPEND(inode) ((inode)->i_flags & S_APPEND)
181 #define IS_IMMUTABLE(inode) ((inode)->i_fl 261 #define IS_IMMUTABLE(inode) ((inode)->i_flags & S_IMMUTABLE)
182 #define IS_POSIXACL(inode) __IS_FLG(inode 262 #define IS_POSIXACL(inode) __IS_FLG(inode, MS_POSIXACL)
183 263
184 #define IS_DEADDIR(inode) ((inode)->i_fl 264 #define IS_DEADDIR(inode) ((inode)->i_flags & S_DEAD)
185 #define IS_NOCMTIME(inode) ((inode)->i_fl 265 #define IS_NOCMTIME(inode) ((inode)->i_flags & S_NOCMTIME)
186 #define IS_SWAPFILE(inode) ((inode)->i_fl 266 #define IS_SWAPFILE(inode) ((inode)->i_flags & S_SWAPFILE)
187 #define IS_PRIVATE(inode) ((inode)->i_fl 267 #define IS_PRIVATE(inode) ((inode)->i_flags & S_PRIVATE)
188 268
189 /* the read-only stuff doesn't really belong h 269 /* the read-only stuff doesn't really belong here, but any other place is
190 probably as bad and I don't want to create 270 probably as bad and I don't want to create yet another include file. */
191 271
192 #define BLKROSET _IO(0x12,93) /* set device 272 #define BLKROSET _IO(0x12,93) /* set device read-only (0 = read-write) */
193 #define BLKROGET _IO(0x12,94) /* get read-on 273 #define BLKROGET _IO(0x12,94) /* get read-only status (0 = read_write) */
194 #define BLKRRPART _IO(0x12,95) /* re-read par 274 #define BLKRRPART _IO(0x12,95) /* re-read partition table */
195 #define BLKGETSIZE _IO(0x12,96) /* return devi 275 #define BLKGETSIZE _IO(0x12,96) /* return device size /512 (long *arg) */
196 #define BLKFLSBUF _IO(0x12,97) /* flush buffe 276 #define BLKFLSBUF _IO(0x12,97) /* flush buffer cache */
197 #define BLKRASET _IO(0x12,98) /* set read ah 277 #define BLKRASET _IO(0x12,98) /* set read ahead for block device */
198 #define BLKRAGET _IO(0x12,99) /* get current 278 #define BLKRAGET _IO(0x12,99) /* get current read ahead setting */
199 #define BLKFRASET _IO(0x12,100)/* set filesys 279 #define BLKFRASET _IO(0x12,100)/* set filesystem (mm/filemap.c) read-ahead */
200 #define BLKFRAGET _IO(0x12,101)/* get filesys 280 #define BLKFRAGET _IO(0x12,101)/* get filesystem (mm/filemap.c) read-ahead */
201 #define BLKSECTSET _IO(0x12,102)/* set max sec 281 #define BLKSECTSET _IO(0x12,102)/* set max sectors per request (ll_rw_blk.c) */
202 #define BLKSECTGET _IO(0x12,103)/* get max sec 282 #define BLKSECTGET _IO(0x12,103)/* get max sectors per request (ll_rw_blk.c) */
203 #define BLKSSZGET _IO(0x12,104)/* get block d 283 #define BLKSSZGET _IO(0x12,104)/* get block device sector size */
204 #if 0 284 #if 0
205 #define BLKPG _IO(0x12,105)/* See blkpg.h 285 #define BLKPG _IO(0x12,105)/* See blkpg.h */
206 286
207 /* Some people are morons. Do not use sizeof! 287 /* Some people are morons. Do not use sizeof! */
208 288
209 #define BLKELVGET _IOR(0x12,106,size_t)/* ele 289 #define BLKELVGET _IOR(0x12,106,size_t)/* elevator get */
210 #define BLKELVSET _IOW(0x12,107,size_t)/* ele 290 #define BLKELVSET _IOW(0x12,107,size_t)/* elevator set */
211 /* This was here just to show that the number 291 /* This was here just to show that the number is taken -
212 probably all these _IO(0x12,*) ioctls shoul 292 probably all these _IO(0x12,*) ioctls should be moved to blkpg.h. */
213 #endif 293 #endif
214 /* A jump here: 108-111 have been used for var 294 /* A jump here: 108-111 have been used for various private purposes. */
215 #define BLKBSZGET _IOR(0x12,112,size_t) 295 #define BLKBSZGET _IOR(0x12,112,size_t)
216 #define BLKBSZSET _IOW(0x12,113,size_t) 296 #define BLKBSZSET _IOW(0x12,113,size_t)
217 #define BLKGETSIZE64 _IOR(0x12,114,size_t) 297 #define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 *arg) */
218 #define BLKTRACESETUP _IOWR(0x12,115,struct bl 298 #define BLKTRACESETUP _IOWR(0x12,115,struct blk_user_trace_setup)
219 #define BLKTRACESTART _IO(0x12,116) 299 #define BLKTRACESTART _IO(0x12,116)
220 #define BLKTRACESTOP _IO(0x12,117) 300 #define BLKTRACESTOP _IO(0x12,117)
221 #define BLKTRACETEARDOWN _IO(0x12,118) 301 #define BLKTRACETEARDOWN _IO(0x12,118)
>> 302 #define BLKDISCARD _IO(0x12,119)
222 303
223 #define BMAP_IOCTL 1 /* obsolete - 304 #define BMAP_IOCTL 1 /* obsolete - kept for compatibility */
224 #define FIBMAP _IO(0x00,1) /* bmap access 305 #define FIBMAP _IO(0x00,1) /* bmap access */
225 #define FIGETBSZ _IO(0x00,2) /* get the blo 306 #define FIGETBSZ _IO(0x00,2) /* get the block size used for bmap */
>> 307 #define FIFREEZE _IOWR('X', 119, int) /* Freeze */
>> 308 #define FITHAW _IOWR('X', 120, int) /* Thaw */
226 309
227 #define FS_IOC_GETFLAGS _IOR(' 310 #define FS_IOC_GETFLAGS _IOR('f', 1, long)
228 #define FS_IOC_SETFLAGS _IOW(' 311 #define FS_IOC_SETFLAGS _IOW('f', 2, long)
229 #define FS_IOC_GETVERSION _IOR(' 312 #define FS_IOC_GETVERSION _IOR('v', 1, long)
230 #define FS_IOC_SETVERSION _IOW(' 313 #define FS_IOC_SETVERSION _IOW('v', 2, long)
>> 314 #define FS_IOC_FIEMAP _IOWR('f', 11, struct fiemap)
231 #define FS_IOC32_GETFLAGS _IOR(' 315 #define FS_IOC32_GETFLAGS _IOR('f', 1, int)
232 #define FS_IOC32_SETFLAGS _IOW(' 316 #define FS_IOC32_SETFLAGS _IOW('f', 2, int)
233 #define FS_IOC32_GETVERSION _IOR(' 317 #define FS_IOC32_GETVERSION _IOR('v', 1, int)
234 #define FS_IOC32_SETVERSION _IOW(' 318 #define FS_IOC32_SETVERSION _IOW('v', 2, int)
235 319
236 /* 320 /*
237 * Inode flags (FS_IOC_GETFLAGS / FS_IOC_SETFL 321 * Inode flags (FS_IOC_GETFLAGS / FS_IOC_SETFLAGS)
238 */ 322 */
239 #define FS_SECRM_FL 0x0000 323 #define FS_SECRM_FL 0x00000001 /* Secure deletion */
240 #define FS_UNRM_FL 0x0000 324 #define FS_UNRM_FL 0x00000002 /* Undelete */
241 #define FS_COMPR_FL 0x0000 325 #define FS_COMPR_FL 0x00000004 /* Compress file */
242 #define FS_SYNC_FL 0x0000 326 #define FS_SYNC_FL 0x00000008 /* Synchronous updates */
243 #define FS_IMMUTABLE_FL 0x0000 327 #define FS_IMMUTABLE_FL 0x00000010 /* Immutable file */
244 #define FS_APPEND_FL 0x0000 328 #define FS_APPEND_FL 0x00000020 /* writes to file may only append */
245 #define FS_NODUMP_FL 0x0000 329 #define FS_NODUMP_FL 0x00000040 /* do not dump file */
246 #define FS_NOATIME_FL 0x0000 330 #define FS_NOATIME_FL 0x00000080 /* do not update atime */
247 /* Reserved for compression usage... */ 331 /* Reserved for compression usage... */
248 #define FS_DIRTY_FL 0x0000 332 #define FS_DIRTY_FL 0x00000100
249 #define FS_COMPRBLK_FL 0x0000 333 #define FS_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */
250 #define FS_NOCOMP_FL 0x0000 334 #define FS_NOCOMP_FL 0x00000400 /* Don't compress */
251 #define FS_ECOMPR_FL 0x0000 335 #define FS_ECOMPR_FL 0x00000800 /* Compression error */
252 /* End compression flags --- maybe not all use 336 /* End compression flags --- maybe not all used */
253 #define FS_BTREE_FL 0x0000 337 #define FS_BTREE_FL 0x00001000 /* btree format dir */
254 #define FS_INDEX_FL 0x0000 338 #define FS_INDEX_FL 0x00001000 /* hash-indexed directory */
255 #define FS_IMAGIC_FL 0x0000 339 #define FS_IMAGIC_FL 0x00002000 /* AFS directory */
256 #define FS_JOURNAL_DATA_FL 0x0000 340 #define FS_JOURNAL_DATA_FL 0x00004000 /* Reserved for ext3 */
257 #define FS_NOTAIL_FL 0x0000 341 #define FS_NOTAIL_FL 0x00008000 /* file tail should not be merged */
258 #define FS_DIRSYNC_FL 0x0001 342 #define FS_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */
259 #define FS_TOPDIR_FL 0x0002 343 #define FS_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/
260 #define FS_EXTENT_FL 0x0008 344 #define FS_EXTENT_FL 0x00080000 /* Extents */
261 #define FS_DIRECTIO_FL 0x0010 345 #define FS_DIRECTIO_FL 0x00100000 /* Use direct i/o */
262 #define FS_RESERVED_FL 0x8000 346 #define FS_RESERVED_FL 0x80000000 /* reserved for ext2 lib */
263 347
264 #define FS_FL_USER_VISIBLE 0x0003 348 #define FS_FL_USER_VISIBLE 0x0003DFFF /* User visible flags */
265 #define FS_FL_USER_MODIFIABLE 0x0003 349 #define FS_FL_USER_MODIFIABLE 0x000380FF /* User modifiable flags */
266 350
267 351
268 #define SYNC_FILE_RANGE_WAIT_BEFORE 1 352 #define SYNC_FILE_RANGE_WAIT_BEFORE 1
269 #define SYNC_FILE_RANGE_WRITE 2 353 #define SYNC_FILE_RANGE_WRITE 2
270 #define SYNC_FILE_RANGE_WAIT_AFTER 4 354 #define SYNC_FILE_RANGE_WAIT_AFTER 4
271 355
272 #ifdef __KERNEL__ 356 #ifdef __KERNEL__
273 357
274 #include <linux/linkage.h> 358 #include <linux/linkage.h>
275 #include <linux/wait.h> 359 #include <linux/wait.h>
276 #include <linux/types.h> 360 #include <linux/types.h>
277 #include <linux/kdev_t.h> 361 #include <linux/kdev_t.h>
278 #include <linux/dcache.h> 362 #include <linux/dcache.h>
279 #include <linux/namei.h> !! 363 #include <linux/path.h>
280 #include <linux/stat.h> 364 #include <linux/stat.h>
281 #include <linux/cache.h> 365 #include <linux/cache.h>
282 #include <linux/kobject.h> 366 #include <linux/kobject.h>
283 #include <linux/list.h> 367 #include <linux/list.h>
284 #include <linux/radix-tree.h> 368 #include <linux/radix-tree.h>
285 #include <linux/prio_tree.h> 369 #include <linux/prio_tree.h>
286 #include <linux/init.h> 370 #include <linux/init.h>
287 #include <linux/pid.h> 371 #include <linux/pid.h>
288 #include <linux/mutex.h> 372 #include <linux/mutex.h>
289 #include <linux/capability.h> 373 #include <linux/capability.h>
>> 374 #include <linux/semaphore.h>
>> 375 #include <linux/fiemap.h>
290 376
291 #include <asm/atomic.h> 377 #include <asm/atomic.h>
292 #include <asm/semaphore.h> <<
293 #include <asm/byteorder.h> 378 #include <asm/byteorder.h>
294 379
295 struct export_operations; 380 struct export_operations;
296 struct hd_geometry; 381 struct hd_geometry;
297 struct iovec; 382 struct iovec;
298 struct nameidata; 383 struct nameidata;
299 struct kiocb; 384 struct kiocb;
300 struct pipe_inode_info; 385 struct pipe_inode_info;
301 struct poll_table_struct; 386 struct poll_table_struct;
302 struct kstatfs; 387 struct kstatfs;
303 struct vm_area_struct; 388 struct vm_area_struct;
304 struct vfsmount; 389 struct vfsmount;
>> 390 struct cred;
305 391
306 extern void __init inode_init(void); 392 extern void __init inode_init(void);
307 extern void __init inode_init_early(void); 393 extern void __init inode_init_early(void);
308 extern void __init mnt_init(void); <<
309 extern void __init files_init(unsigned long); 394 extern void __init files_init(unsigned long);
310 395
>> 396 extern struct files_stat_struct files_stat;
>> 397 extern int get_max_files(void);
>> 398 extern int sysctl_nr_open;
>> 399 extern struct inodes_stat_t inodes_stat;
>> 400 extern int leases_enable, lease_break_time;
>> 401 #ifdef CONFIG_DNOTIFY
>> 402 extern int dir_notify_enable;
>> 403 #endif
>> 404
311 struct buffer_head; 405 struct buffer_head;
312 typedef int (get_block_t)(struct inode *inode, 406 typedef int (get_block_t)(struct inode *inode, sector_t iblock,
313 struct buffer_head *bh 407 struct buffer_head *bh_result, int create);
314 typedef void (dio_iodone_t)(struct kiocb *iocb 408 typedef void (dio_iodone_t)(struct kiocb *iocb, loff_t offset,
315 ssize_t bytes, void *p 409 ssize_t bytes, void *private);
316 410
317 /* 411 /*
318 * Attribute flags. These should be or-ed tog 412 * Attribute flags. These should be or-ed together to figure out what
319 * has been changed! 413 * has been changed!
320 */ 414 */
321 #define ATTR_MODE 1 !! 415 #define ATTR_MODE (1 << 0)
322 #define ATTR_UID 2 !! 416 #define ATTR_UID (1 << 1)
323 #define ATTR_GID 4 !! 417 #define ATTR_GID (1 << 2)
324 #define ATTR_SIZE 8 !! 418 #define ATTR_SIZE (1 << 3)
325 #define ATTR_ATIME 16 !! 419 #define ATTR_ATIME (1 << 4)
326 #define ATTR_MTIME 32 !! 420 #define ATTR_MTIME (1 << 5)
327 #define ATTR_CTIME 64 !! 421 #define ATTR_CTIME (1 << 6)
328 #define ATTR_ATIME_SET 128 !! 422 #define ATTR_ATIME_SET (1 << 7)
329 #define ATTR_MTIME_SET 256 !! 423 #define ATTR_MTIME_SET (1 << 8)
330 #define ATTR_FORCE 512 /* Not a chang !! 424 #define ATTR_FORCE (1 << 9) /* Not a change, but a change it */
331 #define ATTR_ATTR_FLAG 1024 !! 425 #define ATTR_ATTR_FLAG (1 << 10)
332 #define ATTR_KILL_SUID 2048 !! 426 #define ATTR_KILL_SUID (1 << 11)
333 #define ATTR_KILL_SGID 4096 !! 427 #define ATTR_KILL_SGID (1 << 12)
334 #define ATTR_FILE 8192 !! 428 #define ATTR_FILE (1 << 13)
335 #define ATTR_KILL_PRIV 16384 !! 429 #define ATTR_KILL_PRIV (1 << 14)
336 #define ATTR_OPEN 32768 /* Truncating !! 430 #define ATTR_OPEN (1 << 15) /* Truncating from open(O_TRUNC) */
>> 431 #define ATTR_TIMES_SET (1 << 16)
337 432
338 /* 433 /*
339 * This is the Inode Attributes structure, use 434 * This is the Inode Attributes structure, used for notify_change(). It
340 * uses the above definitions as flags, to kno 435 * uses the above definitions as flags, to know which values have changed.
341 * Also, in this manner, a Filesystem can look 436 * Also, in this manner, a Filesystem can look at only the values it cares
342 * about. Basically, these are the attributes 437 * about. Basically, these are the attributes that the VFS layer can
343 * request to change from the FS layer. 438 * request to change from the FS layer.
344 * 439 *
345 * Derek Atkins <warlord@MIT.EDU> 94-10-20 440 * Derek Atkins <warlord@MIT.EDU> 94-10-20
346 */ 441 */
347 struct iattr { 442 struct iattr {
348 unsigned int ia_valid; 443 unsigned int ia_valid;
349 umode_t ia_mode; 444 umode_t ia_mode;
350 uid_t ia_uid; 445 uid_t ia_uid;
351 gid_t ia_gid; 446 gid_t ia_gid;
352 loff_t ia_size; 447 loff_t ia_size;
353 struct timespec ia_atime; 448 struct timespec ia_atime;
354 struct timespec ia_mtime; 449 struct timespec ia_mtime;
355 struct timespec ia_ctime; 450 struct timespec ia_ctime;
356 451
357 /* 452 /*
358 * Not an attribute, but an auxilary i 453 * Not an attribute, but an auxilary info for filesystems wanting to
359 * implement an ftruncate() like metho 454 * implement an ftruncate() like method. NOTE: filesystem should
360 * check for (ia_valid & ATTR_FILE), a 455 * check for (ia_valid & ATTR_FILE), and not for (ia_file != NULL).
361 */ 456 */
362 struct file *ia_file; 457 struct file *ia_file;
363 }; 458 };
364 459
365 /* 460 /*
366 * Includes for diskquotas. 461 * Includes for diskquotas.
367 */ 462 */
368 #include <linux/quota.h> 463 #include <linux/quota.h>
369 464
370 /** 465 /**
371 * enum positive_aop_returns - aop return code 466 * enum positive_aop_returns - aop return codes with specific semantics
372 * 467 *
373 * @AOP_WRITEPAGE_ACTIVATE: Informs the caller 468 * @AOP_WRITEPAGE_ACTIVATE: Informs the caller that page writeback has
374 * completed, that th 469 * completed, that the page is still locked, and
375 * should be consider 470 * should be considered active. The VM uses this hint
376 * to return the page 471 * to return the page to the active list -- it won't
377 * be a candidate for 472 * be a candidate for writeback again in the near
378 * future. Other cal 473 * future. Other callers must be careful to unlock
379 * the page if they g 474 * the page if they get this return. Returned by
380 * writepage(); 475 * writepage();
381 * 476 *
382 * @AOP_TRUNCATED_PAGE: The AOP method that wa 477 * @AOP_TRUNCATED_PAGE: The AOP method that was handed a locked page has
383 * unlocked it and the pa 478 * unlocked it and the page might have been truncated.
384 * The caller should back 479 * The caller should back up to acquiring a new page and
385 * trying again. The aop 480 * trying again. The aop will be taking reasonable
386 * precautions not to liv 481 * precautions not to livelock. If the caller held a page
387 * reference, it should d 482 * reference, it should drop it before retrying. Returned
388 * by readpage(). 483 * by readpage().
389 * 484 *
390 * address_space_operation functions return th 485 * address_space_operation functions return these large constants to indicate
391 * special semantics to the caller. These are 486 * special semantics to the caller. These are much larger than the bytes in a
392 * page to allow for functions that return the 487 * page to allow for functions that return the number of bytes operated on in a
393 * given page. 488 * given page.
394 */ 489 */
395 490
396 enum positive_aop_returns { 491 enum positive_aop_returns {
397 AOP_WRITEPAGE_ACTIVATE = 0x80000, 492 AOP_WRITEPAGE_ACTIVATE = 0x80000,
398 AOP_TRUNCATED_PAGE = 0x80001, 493 AOP_TRUNCATED_PAGE = 0x80001,
399 }; 494 };
400 495
401 #define AOP_FLAG_UNINTERRUPTIBLE 0x0001 496 #define AOP_FLAG_UNINTERRUPTIBLE 0x0001 /* will not do a short write */
402 #define AOP_FLAG_CONT_EXPAND 0x0002 497 #define AOP_FLAG_CONT_EXPAND 0x0002 /* called from cont_expand */
>> 498 #define AOP_FLAG_NOFS 0x0004 /* used by filesystem to direct
>> 499 * helper code (eg buffer layer)
>> 500 * to clear GFP_FS from alloc */
403 501
404 /* 502 /*
405 * oh the beauties of C type declarations. 503 * oh the beauties of C type declarations.
406 */ 504 */
407 struct page; 505 struct page;
408 struct address_space; 506 struct address_space;
409 struct writeback_control; 507 struct writeback_control;
410 508
411 struct iov_iter { 509 struct iov_iter {
412 const struct iovec *iov; 510 const struct iovec *iov;
413 unsigned long nr_segs; 511 unsigned long nr_segs;
414 size_t iov_offset; 512 size_t iov_offset;
415 size_t count; 513 size_t count;
416 }; 514 };
417 515
418 size_t iov_iter_copy_from_user_atomic(struct p 516 size_t iov_iter_copy_from_user_atomic(struct page *page,
419 struct iov_iter *i, unsigned l 517 struct iov_iter *i, unsigned long offset, size_t bytes);
420 size_t iov_iter_copy_from_user(struct page *pa 518 size_t iov_iter_copy_from_user(struct page *page,
421 struct iov_iter *i, unsigned l 519 struct iov_iter *i, unsigned long offset, size_t bytes);
422 void iov_iter_advance(struct iov_iter *i, size 520 void iov_iter_advance(struct iov_iter *i, size_t bytes);
423 int iov_iter_fault_in_readable(struct iov_iter 521 int iov_iter_fault_in_readable(struct iov_iter *i, size_t bytes);
424 size_t iov_iter_single_seg_count(struct iov_it 522 size_t iov_iter_single_seg_count(struct iov_iter *i);
425 523
426 static inline void iov_iter_init(struct iov_it 524 static inline void iov_iter_init(struct iov_iter *i,
427 const struct iovec *io 525 const struct iovec *iov, unsigned long nr_segs,
428 size_t count, size_t w 526 size_t count, size_t written)
429 { 527 {
430 i->iov = iov; 528 i->iov = iov;
431 i->nr_segs = nr_segs; 529 i->nr_segs = nr_segs;
432 i->iov_offset = 0; 530 i->iov_offset = 0;
433 i->count = count + written; 531 i->count = count + written;
434 532
435 iov_iter_advance(i, written); 533 iov_iter_advance(i, written);
436 } 534 }
437 535
438 static inline size_t iov_iter_count(struct iov 536 static inline size_t iov_iter_count(struct iov_iter *i)
439 { 537 {
440 return i->count; 538 return i->count;
441 } 539 }
442 540
>> 541 /*
>> 542 * "descriptor" for what we're up to with a read.
>> 543 * This allows us to use the same read code yet
>> 544 * have multiple different users of the data that
>> 545 * we read from a file.
>> 546 *
>> 547 * The simplest case just copies the data to user
>> 548 * mode.
>> 549 */
>> 550 typedef struct {
>> 551 size_t written;
>> 552 size_t count;
>> 553 union {
>> 554 char __user *buf;
>> 555 void *data;
>> 556 } arg;
>> 557 int error;
>> 558 } read_descriptor_t;
>> 559
>> 560 typedef int (*read_actor_t)(read_descriptor_t *, struct page *,
>> 561 unsigned long, unsigned long);
443 562
444 struct address_space_operations { 563 struct address_space_operations {
445 int (*writepage)(struct page *page, st 564 int (*writepage)(struct page *page, struct writeback_control *wbc);
446 int (*readpage)(struct file *, struct 565 int (*readpage)(struct file *, struct page *);
447 void (*sync_page)(struct page *); 566 void (*sync_page)(struct page *);
448 567
449 /* Write back some dirty pages from th 568 /* Write back some dirty pages from this mapping. */
450 int (*writepages)(struct address_space 569 int (*writepages)(struct address_space *, struct writeback_control *);
451 570
452 /* Set a page dirty. Return true if t 571 /* Set a page dirty. Return true if this dirtied it */
453 int (*set_page_dirty)(struct page *pag 572 int (*set_page_dirty)(struct page *page);
454 573
455 int (*readpages)(struct file *filp, st 574 int (*readpages)(struct file *filp, struct address_space *mapping,
456 struct list_head *page 575 struct list_head *pages, unsigned nr_pages);
457 576
458 /* <<
459 * ext3 requires that a successful pre <<
460 * by a commit_write() call - they mus <<
461 */ <<
462 int (*prepare_write)(struct file *, st <<
463 int (*commit_write)(struct file *, str <<
464 <<
465 int (*write_begin)(struct file *, stru 577 int (*write_begin)(struct file *, struct address_space *mapping,
466 loff_t pos, un 578 loff_t pos, unsigned len, unsigned flags,
467 struct page ** 579 struct page **pagep, void **fsdata);
468 int (*write_end)(struct file *, struct 580 int (*write_end)(struct file *, struct address_space *mapping,
469 loff_t pos, un 581 loff_t pos, unsigned len, unsigned copied,
470 struct page *p 582 struct page *page, void *fsdata);
471 583
472 /* Unfortunately this kludge is needed 584 /* Unfortunately this kludge is needed for FIBMAP. Don't use it */
473 sector_t (*bmap)(struct address_space 585 sector_t (*bmap)(struct address_space *, sector_t);
474 void (*invalidatepage) (struct page *, 586 void (*invalidatepage) (struct page *, unsigned long);
475 int (*releasepage) (struct page *, gfp 587 int (*releasepage) (struct page *, gfp_t);
476 ssize_t (*direct_IO)(int, struct kiocb 588 ssize_t (*direct_IO)(int, struct kiocb *, const struct iovec *iov,
477 loff_t offset, unsigne 589 loff_t offset, unsigned long nr_segs);
478 struct page* (*get_xip_page)(struct ad !! 590 int (*get_xip_mem)(struct address_space *, pgoff_t, int,
479 int); !! 591 void **, unsigned long *);
480 /* migrate the contents of a page to t 592 /* migrate the contents of a page to the specified target */
481 int (*migratepage) (struct address_spa 593 int (*migratepage) (struct address_space *,
482 struct page *, struct 594 struct page *, struct page *);
483 int (*launder_page) (struct page *); 595 int (*launder_page) (struct page *);
>> 596 int (*is_partially_uptodate) (struct page *, read_descriptor_t *,
>> 597 unsigned long);
484 }; 598 };
485 599
486 /* 600 /*
487 * pagecache_write_begin/pagecache_write_end m 601 * pagecache_write_begin/pagecache_write_end must be used by general code
488 * to write into the pagecache. 602 * to write into the pagecache.
489 */ 603 */
490 int pagecache_write_begin(struct file *, struc 604 int pagecache_write_begin(struct file *, struct address_space *mapping,
491 loff_t pos, un 605 loff_t pos, unsigned len, unsigned flags,
492 struct page ** 606 struct page **pagep, void **fsdata);
493 607
494 int pagecache_write_end(struct file *, struct 608 int pagecache_write_end(struct file *, struct address_space *mapping,
495 loff_t pos, un 609 loff_t pos, unsigned len, unsigned copied,
496 struct page *p 610 struct page *page, void *fsdata);
497 611
498 struct backing_dev_info; 612 struct backing_dev_info;
499 struct address_space { 613 struct address_space {
500 struct inode *host; 614 struct inode *host; /* owner: inode, block_device */
501 struct radix_tree_root page_tree; 615 struct radix_tree_root page_tree; /* radix tree of all pages */
502 rwlock_t tree_lock; !! 616 spinlock_t tree_lock; /* and lock protecting it */
503 unsigned int i_mmap_writabl 617 unsigned int i_mmap_writable;/* count VM_SHARED mappings */
504 struct prio_tree_root i_mmap; 618 struct prio_tree_root i_mmap; /* tree of private and shared mappings */
505 struct list_head i_mmap_nonline 619 struct list_head i_mmap_nonlinear;/*list VM_NONLINEAR mappings */
506 spinlock_t i_mmap_lock; 620 spinlock_t i_mmap_lock; /* protect tree, count, list */
507 unsigned int truncate_count 621 unsigned int truncate_count; /* Cover race condition with truncate */
508 unsigned long nrpages; 622 unsigned long nrpages; /* number of total pages */
509 pgoff_t writeback_inde 623 pgoff_t writeback_index;/* writeback starts here */
510 const struct address_space_operations 624 const struct address_space_operations *a_ops; /* methods */
511 unsigned long flags; 625 unsigned long flags; /* error bits/gfp mask */
512 struct backing_dev_info *backing_dev_i 626 struct backing_dev_info *backing_dev_info; /* device readahead, etc */
513 spinlock_t private_lock; 627 spinlock_t private_lock; /* for use by the address_space */
514 struct list_head private_list; 628 struct list_head private_list; /* ditto */
515 struct address_space *assoc_mapping 629 struct address_space *assoc_mapping; /* ditto */
516 } __attribute__((aligned(sizeof(long)))); 630 } __attribute__((aligned(sizeof(long))));
517 /* 631 /*
518 * On most architectures that alignmen 632 * On most architectures that alignment is already the case; but
519 * must be enforced here for CRIS, to 633 * must be enforced here for CRIS, to let the least signficant bit
520 * of struct page's "mapping" pointer 634 * of struct page's "mapping" pointer be used for PAGE_MAPPING_ANON.
521 */ 635 */
522 636
523 struct block_device { 637 struct block_device {
524 dev_t bd_dev; /* no 638 dev_t bd_dev; /* not a kdev_t - it's a search key */
525 struct inode * bd_inode; 639 struct inode * bd_inode; /* will die */
>> 640 struct super_block * bd_super;
526 int bd_openers; 641 int bd_openers;
527 struct mutex bd_mutex; 642 struct mutex bd_mutex; /* open/close mutex */
528 struct semaphore bd_mount_sem; 643 struct semaphore bd_mount_sem;
529 struct list_head bd_inodes; 644 struct list_head bd_inodes;
530 void * bd_holder; 645 void * bd_holder;
531 int bd_holders; 646 int bd_holders;
532 #ifdef CONFIG_SYSFS 647 #ifdef CONFIG_SYSFS
533 struct list_head bd_holder_list 648 struct list_head bd_holder_list;
534 #endif 649 #endif
535 struct block_device * bd_contains; 650 struct block_device * bd_contains;
536 unsigned bd_block_size; 651 unsigned bd_block_size;
537 struct hd_struct * bd_part; 652 struct hd_struct * bd_part;
538 /* number of times partitions within t 653 /* number of times partitions within this device have been opened. */
539 unsigned bd_part_count; 654 unsigned bd_part_count;
540 int bd_invalidated 655 int bd_invalidated;
541 struct gendisk * bd_disk; 656 struct gendisk * bd_disk;
542 struct list_head bd_list; 657 struct list_head bd_list;
543 struct backing_dev_info *bd_inode_back 658 struct backing_dev_info *bd_inode_backing_dev_info;
544 /* 659 /*
545 * Private data. You must have bd_cla 660 * Private data. You must have bd_claim'ed the block_device
546 * to use this. NOTE: bd_claim allow 661 * to use this. NOTE: bd_claim allows an owner to claim
547 * the same device multiple times, the 662 * the same device multiple times, the owner must take special
548 * care to not mess up bd_private for 663 * care to not mess up bd_private for that case.
549 */ 664 */
550 unsigned long bd_private; 665 unsigned long bd_private;
>> 666
>> 667 /* The counter of freeze processes */
>> 668 int bd_fsfreeze_count;
>> 669 /* Mutex for freeze */
>> 670 struct mutex bd_fsfreeze_mutex;
551 }; 671 };
552 672
553 /* 673 /*
554 * Radix-tree tags, for tagging dirty and writ 674 * Radix-tree tags, for tagging dirty and writeback pages within the pagecache
555 * radix trees 675 * radix trees
556 */ 676 */
557 #define PAGECACHE_TAG_DIRTY 0 677 #define PAGECACHE_TAG_DIRTY 0
558 #define PAGECACHE_TAG_WRITEBACK 1 678 #define PAGECACHE_TAG_WRITEBACK 1
559 679
560 int mapping_tagged(struct address_space *mappi 680 int mapping_tagged(struct address_space *mapping, int tag);
561 681
562 /* 682 /*
563 * Might pages of this file be mapped into use 683 * Might pages of this file be mapped into userspace?
564 */ 684 */
565 static inline int mapping_mapped(struct addres 685 static inline int mapping_mapped(struct address_space *mapping)
566 { 686 {
567 return !prio_tree_empty(&mapping->i_m 687 return !prio_tree_empty(&mapping->i_mmap) ||
568 !list_empty(&mapping->i_mmap_n 688 !list_empty(&mapping->i_mmap_nonlinear);
569 } 689 }
570 690
571 /* 691 /*
572 * Might pages of this file have been modified 692 * Might pages of this file have been modified in userspace?
573 * Note that i_mmap_writable counts all VM_SHA 693 * Note that i_mmap_writable counts all VM_SHARED vmas: do_mmap_pgoff
574 * marks vma as VM_SHARED if it is shared, and 694 * marks vma as VM_SHARED if it is shared, and the file was opened for
575 * writing i.e. vma may be mprotected writable 695 * writing i.e. vma may be mprotected writable even if now readonly.
576 */ 696 */
577 static inline int mapping_writably_mapped(stru 697 static inline int mapping_writably_mapped(struct address_space *mapping)
578 { 698 {
579 return mapping->i_mmap_writable != 0; 699 return mapping->i_mmap_writable != 0;
580 } 700 }
581 701
582 /* 702 /*
583 * Use sequence counter to get consistent i_si 703 * Use sequence counter to get consistent i_size on 32-bit processors.
584 */ 704 */
585 #if BITS_PER_LONG==32 && defined(CONFIG_SMP) 705 #if BITS_PER_LONG==32 && defined(CONFIG_SMP)
586 #include <linux/seqlock.h> 706 #include <linux/seqlock.h>
587 #define __NEED_I_SIZE_ORDERED 707 #define __NEED_I_SIZE_ORDERED
588 #define i_size_ordered_init(inode) seqcount_in 708 #define i_size_ordered_init(inode) seqcount_init(&inode->i_size_seqcount)
589 #else 709 #else
590 #define i_size_ordered_init(inode) do { } whil 710 #define i_size_ordered_init(inode) do { } while (0)
591 #endif 711 #endif
592 712
>> 713 struct posix_acl;
>> 714 #define ACL_NOT_CACHED ((void *)(-1))
>> 715
593 struct inode { 716 struct inode {
594 struct hlist_node i_hash; 717 struct hlist_node i_hash;
595 struct list_head i_list; 718 struct list_head i_list;
596 struct list_head i_sb_list; 719 struct list_head i_sb_list;
597 struct list_head i_dentry; 720 struct list_head i_dentry;
598 unsigned long i_ino; 721 unsigned long i_ino;
599 atomic_t i_count; 722 atomic_t i_count;
600 unsigned int i_nlink; 723 unsigned int i_nlink;
601 uid_t i_uid; 724 uid_t i_uid;
602 gid_t i_gid; 725 gid_t i_gid;
603 dev_t i_rdev; 726 dev_t i_rdev;
604 u64 i_version; 727 u64 i_version;
605 loff_t i_size; 728 loff_t i_size;
606 #ifdef __NEED_I_SIZE_ORDERED 729 #ifdef __NEED_I_SIZE_ORDERED
607 seqcount_t i_size_seqcoun 730 seqcount_t i_size_seqcount;
608 #endif 731 #endif
609 struct timespec i_atime; 732 struct timespec i_atime;
610 struct timespec i_mtime; 733 struct timespec i_mtime;
611 struct timespec i_ctime; 734 struct timespec i_ctime;
612 unsigned int i_blkbits; <<
613 blkcnt_t i_blocks; 735 blkcnt_t i_blocks;
>> 736 unsigned int i_blkbits;
614 unsigned short i_bytes; 737 unsigned short i_bytes;
615 umode_t i_mode; 738 umode_t i_mode;
616 spinlock_t i_lock; /* i_b 739 spinlock_t i_lock; /* i_blocks, i_bytes, maybe i_size */
617 struct mutex i_mutex; 740 struct mutex i_mutex;
618 struct rw_semaphore i_alloc_sem; 741 struct rw_semaphore i_alloc_sem;
619 const struct inode_operations *i_op; 742 const struct inode_operations *i_op;
620 const struct file_operations *i_fop 743 const struct file_operations *i_fop; /* former ->i_op->default_file_ops */
621 struct super_block *i_sb; 744 struct super_block *i_sb;
622 struct file_lock *i_flock; 745 struct file_lock *i_flock;
623 struct address_space *i_mapping; 746 struct address_space *i_mapping;
624 struct address_space i_data; 747 struct address_space i_data;
625 #ifdef CONFIG_QUOTA 748 #ifdef CONFIG_QUOTA
626 struct dquot *i_dquot[MAXQU 749 struct dquot *i_dquot[MAXQUOTAS];
627 #endif 750 #endif
628 struct list_head i_devices; 751 struct list_head i_devices;
629 union { 752 union {
630 struct pipe_inode_info *i_pip 753 struct pipe_inode_info *i_pipe;
631 struct block_device *i_bde 754 struct block_device *i_bdev;
632 struct cdev *i_cde 755 struct cdev *i_cdev;
633 }; 756 };
634 int i_cindex; <<
635 757
636 __u32 i_generation; 758 __u32 i_generation;
637 759
638 #ifdef CONFIG_DNOTIFY !! 760 #ifdef CONFIG_FSNOTIFY
639 unsigned long i_dnotify_mask !! 761 __u32 i_fsnotify_mask; /* all events this inode cares about */
640 struct dnotify_struct *i_dnotify; /* !! 762 struct hlist_head i_fsnotify_mark_entries; /* fsnotify mark entries */
641 #endif 763 #endif
642 764
643 #ifdef CONFIG_INOTIFY 765 #ifdef CONFIG_INOTIFY
644 struct list_head inotify_watche 766 struct list_head inotify_watches; /* watches on this inode */
645 struct mutex inotify_mutex; 767 struct mutex inotify_mutex; /* protects the watches list */
646 #endif 768 #endif
647 769
648 unsigned long i_state; 770 unsigned long i_state;
649 unsigned long dirtied_when; 771 unsigned long dirtied_when; /* jiffies of first dirtying */
650 772
651 unsigned int i_flags; 773 unsigned int i_flags;
652 774
653 atomic_t i_writecount; 775 atomic_t i_writecount;
654 #ifdef CONFIG_SECURITY 776 #ifdef CONFIG_SECURITY
655 void *i_security; 777 void *i_security;
656 #endif 778 #endif
>> 779 #ifdef CONFIG_FS_POSIX_ACL
>> 780 struct posix_acl *i_acl;
>> 781 struct posix_acl *i_default_acl;
>> 782 #endif
657 void *i_private; /* 783 void *i_private; /* fs or device private pointer */
658 }; 784 };
659 785
660 /* 786 /*
661 * inode->i_mutex nesting subclasses for the l 787 * inode->i_mutex nesting subclasses for the lock validator:
662 * 788 *
663 * 0: the object of the current VFS operation 789 * 0: the object of the current VFS operation
664 * 1: parent 790 * 1: parent
665 * 2: child/target 791 * 2: child/target
666 * 3: quota file 792 * 3: quota file
667 * 793 *
668 * The locking order between these classes is 794 * The locking order between these classes is
669 * parent -> child -> normal -> xattr -> quota 795 * parent -> child -> normal -> xattr -> quota
670 */ 796 */
671 enum inode_i_mutex_lock_class 797 enum inode_i_mutex_lock_class
672 { 798 {
673 I_MUTEX_NORMAL, 799 I_MUTEX_NORMAL,
674 I_MUTEX_PARENT, 800 I_MUTEX_PARENT,
675 I_MUTEX_CHILD, 801 I_MUTEX_CHILD,
676 I_MUTEX_XATTR, 802 I_MUTEX_XATTR,
677 I_MUTEX_QUOTA 803 I_MUTEX_QUOTA
678 }; 804 };
679 805
680 extern void inode_double_lock(struct inode *in <<
681 extern void inode_double_unlock(struct inode * <<
682 <<
683 /* 806 /*
684 * NOTE: in a 32bit arch with a preemptable ke 807 * NOTE: in a 32bit arch with a preemptable kernel and
685 * an UP compile the i_size_read/write must be 808 * an UP compile the i_size_read/write must be atomic
686 * with respect to the local cpu (unlike with 809 * with respect to the local cpu (unlike with preempt disabled),
687 * but they don't need to be atomic with respe 810 * but they don't need to be atomic with respect to other cpus like in
688 * true SMP (so they need either to either loc 811 * true SMP (so they need either to either locally disable irq around
689 * the read or for example on x86 they can be 812 * the read or for example on x86 they can be still implemented as a
690 * cmpxchg8b without the need of the lock pref 813 * cmpxchg8b without the need of the lock prefix). For SMP compiles
691 * and 64bit archs it makes no difference if p 814 * and 64bit archs it makes no difference if preempt is enabled or not.
692 */ 815 */
693 static inline loff_t i_size_read(const struct 816 static inline loff_t i_size_read(const struct inode *inode)
694 { 817 {
695 #if BITS_PER_LONG==32 && defined(CONFIG_SMP) 818 #if BITS_PER_LONG==32 && defined(CONFIG_SMP)
696 loff_t i_size; 819 loff_t i_size;
697 unsigned int seq; 820 unsigned int seq;
698 821
699 do { 822 do {
700 seq = read_seqcount_begin(&ino 823 seq = read_seqcount_begin(&inode->i_size_seqcount);
701 i_size = inode->i_size; 824 i_size = inode->i_size;
702 } while (read_seqcount_retry(&inode->i 825 } while (read_seqcount_retry(&inode->i_size_seqcount, seq));
703 return i_size; 826 return i_size;
704 #elif BITS_PER_LONG==32 && defined(CONFIG_PREE 827 #elif BITS_PER_LONG==32 && defined(CONFIG_PREEMPT)
705 loff_t i_size; 828 loff_t i_size;
706 829
707 preempt_disable(); 830 preempt_disable();
708 i_size = inode->i_size; 831 i_size = inode->i_size;
709 preempt_enable(); 832 preempt_enable();
710 return i_size; 833 return i_size;
711 #else 834 #else
712 return inode->i_size; 835 return inode->i_size;
713 #endif 836 #endif
714 } 837 }
715 838
716 /* 839 /*
717 * NOTE: unlike i_size_read(), i_size_write() 840 * NOTE: unlike i_size_read(), i_size_write() does need locking around it
718 * (normally i_mutex), otherwise on 32bit/SMP 841 * (normally i_mutex), otherwise on 32bit/SMP an update of i_size_seqcount
719 * can be lost, resulting in subsequent i_size 842 * can be lost, resulting in subsequent i_size_read() calls spinning forever.
720 */ 843 */
721 static inline void i_size_write(struct inode * 844 static inline void i_size_write(struct inode *inode, loff_t i_size)
722 { 845 {
723 #if BITS_PER_LONG==32 && defined(CONFIG_SMP) 846 #if BITS_PER_LONG==32 && defined(CONFIG_SMP)
724 write_seqcount_begin(&inode->i_size_se 847 write_seqcount_begin(&inode->i_size_seqcount);
725 inode->i_size = i_size; 848 inode->i_size = i_size;
726 write_seqcount_end(&inode->i_size_seqc 849 write_seqcount_end(&inode->i_size_seqcount);
727 #elif BITS_PER_LONG==32 && defined(CONFIG_PREE 850 #elif BITS_PER_LONG==32 && defined(CONFIG_PREEMPT)
728 preempt_disable(); 851 preempt_disable();
729 inode->i_size = i_size; 852 inode->i_size = i_size;
730 preempt_enable(); 853 preempt_enable();
731 #else 854 #else
732 inode->i_size = i_size; 855 inode->i_size = i_size;
733 #endif 856 #endif
734 } 857 }
735 858
736 static inline unsigned iminor(const struct ino 859 static inline unsigned iminor(const struct inode *inode)
737 { 860 {
738 return MINOR(inode->i_rdev); 861 return MINOR(inode->i_rdev);
739 } 862 }
740 863
741 static inline unsigned imajor(const struct ino 864 static inline unsigned imajor(const struct inode *inode)
742 { 865 {
743 return MAJOR(inode->i_rdev); 866 return MAJOR(inode->i_rdev);
744 } 867 }
745 868
746 extern struct block_device *I_BDEV(struct inod 869 extern struct block_device *I_BDEV(struct inode *inode);
747 870
748 struct fown_struct { 871 struct fown_struct {
749 rwlock_t lock; /* protects pi 872 rwlock_t lock; /* protects pid, uid, euid fields */
750 struct pid *pid; /* pid or -pgr 873 struct pid *pid; /* pid or -pgrp where SIGIO should be sent */
751 enum pid_type pid_type; /* Kind of pro 874 enum pid_type pid_type; /* Kind of process group SIGIO should be sent to */
752 uid_t uid, euid; /* uid/euid of 875 uid_t uid, euid; /* uid/euid of process setting the owner */
753 int signum; /* posix.1b rt 876 int signum; /* posix.1b rt signal to be delivered on IO */
754 }; 877 };
755 878
756 /* 879 /*
757 * Track a single file's readahead state 880 * Track a single file's readahead state
758 */ 881 */
759 struct file_ra_state { 882 struct file_ra_state {
760 pgoff_t start; /* whe 883 pgoff_t start; /* where readahead started */
761 unsigned int size; /* # o 884 unsigned int size; /* # of readahead pages */
762 unsigned int async_size; /* do 885 unsigned int async_size; /* do asynchronous readahead when
763 the 886 there are only # of pages ahead */
764 887
765 unsigned int ra_pages; /* Max 888 unsigned int ra_pages; /* Maximum readahead window */
766 int mmap_miss; /* Cac !! 889 unsigned int mmap_miss; /* Cache miss stat for mmap accesses */
767 loff_t prev_pos; /* Cac 890 loff_t prev_pos; /* Cache last read() position */
768 }; 891 };
769 892
770 /* 893 /*
771 * Check if @index falls in the readahead wind 894 * Check if @index falls in the readahead windows.
772 */ 895 */
773 static inline int ra_has_index(struct file_ra_ 896 static inline int ra_has_index(struct file_ra_state *ra, pgoff_t index)
774 { 897 {
775 return (index >= ra->start && 898 return (index >= ra->start &&
776 index < ra->start + ra->size) 899 index < ra->start + ra->size);
777 } 900 }
778 901
>> 902 #define FILE_MNT_WRITE_TAKEN 1
>> 903 #define FILE_MNT_WRITE_RELEASED 2
>> 904
779 struct file { 905 struct file {
780 /* 906 /*
781 * fu_list becomes invalid after file_ 907 * fu_list becomes invalid after file_free is called and queued via
782 * fu_rcuhead for RCU freeing 908 * fu_rcuhead for RCU freeing
783 */ 909 */
784 union { 910 union {
785 struct list_head fu_lis 911 struct list_head fu_list;
786 struct rcu_head fu_rcu 912 struct rcu_head fu_rcuhead;
787 } f_u; 913 } f_u;
788 struct path f_path; 914 struct path f_path;
789 #define f_dentry f_path.dentry 915 #define f_dentry f_path.dentry
790 #define f_vfsmnt f_path.mnt 916 #define f_vfsmnt f_path.mnt
791 const struct file_operations *f_op; 917 const struct file_operations *f_op;
792 atomic_t f_count; !! 918 spinlock_t f_lock; /* f_ep_links, f_flags, no IRQ */
>> 919 atomic_long_t f_count;
793 unsigned int f_flags; 920 unsigned int f_flags;
794 mode_t f_mode; !! 921 fmode_t f_mode;
795 loff_t f_pos; 922 loff_t f_pos;
796 struct fown_struct f_owner; 923 struct fown_struct f_owner;
797 unsigned int f_uid, f_gid; !! 924 const struct cred *f_cred;
798 struct file_ra_state f_ra; 925 struct file_ra_state f_ra;
799 926
800 u64 f_version; 927 u64 f_version;
801 #ifdef CONFIG_SECURITY 928 #ifdef CONFIG_SECURITY
802 void *f_security; 929 void *f_security;
803 #endif 930 #endif
804 /* needed for tty driver, and maybe ot 931 /* needed for tty driver, and maybe others */
805 void *private_data; 932 void *private_data;
806 933
807 #ifdef CONFIG_EPOLL 934 #ifdef CONFIG_EPOLL
808 /* Used by fs/eventpoll.c to link all 935 /* Used by fs/eventpoll.c to link all the hooks to this file */
809 struct list_head f_ep_links; 936 struct list_head f_ep_links;
810 spinlock_t f_ep_lock; <<
811 #endif /* #ifdef CONFIG_EPOLL */ 937 #endif /* #ifdef CONFIG_EPOLL */
812 struct address_space *f_mapping; 938 struct address_space *f_mapping;
>> 939 #ifdef CONFIG_DEBUG_WRITECOUNT
>> 940 unsigned long f_mnt_write_state;
>> 941 #endif
813 }; 942 };
814 extern spinlock_t files_lock; 943 extern spinlock_t files_lock;
815 #define file_list_lock() spin_lock(&files_lock 944 #define file_list_lock() spin_lock(&files_lock);
816 #define file_list_unlock() spin_unlock(&files_ 945 #define file_list_unlock() spin_unlock(&files_lock);
817 946
818 #define get_file(x) atomic_inc(&(x)->f_cou !! 947 #define get_file(x) atomic_long_inc(&(x)->f_count)
819 #define file_count(x) atomic_read(&(x)->f_co !! 948 #define file_count(x) atomic_long_read(&(x)->f_count)
>> 949
>> 950 #ifdef CONFIG_DEBUG_WRITECOUNT
>> 951 static inline void file_take_write(struct file *f)
>> 952 {
>> 953 WARN_ON(f->f_mnt_write_state != 0);
>> 954 f->f_mnt_write_state = FILE_MNT_WRITE_TAKEN;
>> 955 }
>> 956 static inline void file_release_write(struct file *f)
>> 957 {
>> 958 f->f_mnt_write_state |= FILE_MNT_WRITE_RELEASED;
>> 959 }
>> 960 static inline void file_reset_write(struct file *f)
>> 961 {
>> 962 f->f_mnt_write_state = 0;
>> 963 }
>> 964 static inline void file_check_state(struct file *f)
>> 965 {
>> 966 /*
>> 967 * At this point, either both or neither of these bits
>> 968 * should be set.
>> 969 */
>> 970 WARN_ON(f->f_mnt_write_state == FILE_MNT_WRITE_TAKEN);
>> 971 WARN_ON(f->f_mnt_write_state == FILE_MNT_WRITE_RELEASED);
>> 972 }
>> 973 static inline int file_check_writeable(struct file *f)
>> 974 {
>> 975 if (f->f_mnt_write_state == FILE_MNT_WRITE_TAKEN)
>> 976 return 0;
>> 977 printk(KERN_WARNING "writeable file with no "
>> 978 "mnt_want_write()\n");
>> 979 WARN_ON(1);
>> 980 return -EINVAL;
>> 981 }
>> 982 #else /* !CONFIG_DEBUG_WRITECOUNT */
>> 983 static inline void file_take_write(struct file *filp) {}
>> 984 static inline void file_release_write(struct file *filp) {}
>> 985 static inline void file_reset_write(struct file *filp) {}
>> 986 static inline void file_check_state(struct file *filp) {}
>> 987 static inline int file_check_writeable(struct file *filp)
>> 988 {
>> 989 return 0;
>> 990 }
>> 991 #endif /* CONFIG_DEBUG_WRITECOUNT */
820 992
821 #define MAX_NON_LFS ((1UL<<31) - 1) 993 #define MAX_NON_LFS ((1UL<<31) - 1)
822 994
823 /* Page cache limit. The filesystems should pu 995 /* Page cache limit. The filesystems should put that into their s_maxbytes
824 limits, otherwise bad things can happen in 996 limits, otherwise bad things can happen in VM. */
825 #if BITS_PER_LONG==32 997 #if BITS_PER_LONG==32
826 #define MAX_LFS_FILESIZE (((u64)PAGE_CA 998 #define MAX_LFS_FILESIZE (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1)
827 #elif BITS_PER_LONG==64 999 #elif BITS_PER_LONG==64
828 #define MAX_LFS_FILESIZE 0x7fffffffffff 1000 #define MAX_LFS_FILESIZE 0x7fffffffffffffffUL
829 #endif 1001 #endif
830 1002
831 #define FL_POSIX 1 1003 #define FL_POSIX 1
832 #define FL_FLOCK 2 1004 #define FL_FLOCK 2
833 #define FL_ACCESS 8 /* not trying 1005 #define FL_ACCESS 8 /* not trying to lock, just looking */
834 #define FL_EXISTS 16 /* when unlock 1006 #define FL_EXISTS 16 /* when unlocking, test for existence */
835 #define FL_LEASE 32 /* lease held 1007 #define FL_LEASE 32 /* lease held on this file */
836 #define FL_CLOSE 64 /* unlock on c 1008 #define FL_CLOSE 64 /* unlock on close */
837 #define FL_SLEEP 128 /* A blocking 1009 #define FL_SLEEP 128 /* A blocking lock */
838 1010
839 /* 1011 /*
>> 1012 * Special return value from posix_lock_file() and vfs_lock_file() for
>> 1013 * asynchronous locking.
>> 1014 */
>> 1015 #define FILE_LOCK_DEFERRED 1
>> 1016
>> 1017 /*
840 * The POSIX file lock owner is determined by 1018 * The POSIX file lock owner is determined by
841 * the "struct files_struct" in the thread gro 1019 * the "struct files_struct" in the thread group
842 * (or NULL for no owner - BSD locks). 1020 * (or NULL for no owner - BSD locks).
843 * 1021 *
844 * Lockd stuffs a "host" pointer into this. 1022 * Lockd stuffs a "host" pointer into this.
845 */ 1023 */
846 typedef struct files_struct *fl_owner_t; 1024 typedef struct files_struct *fl_owner_t;
847 1025
848 struct file_lock_operations { 1026 struct file_lock_operations {
849 void (*fl_insert)(struct file_lock *); <<
850 void (*fl_remove)(struct file_lock *); <<
851 void (*fl_copy_lock)(struct file_lock 1027 void (*fl_copy_lock)(struct file_lock *, struct file_lock *);
852 void (*fl_release_private)(struct file 1028 void (*fl_release_private)(struct file_lock *);
853 }; 1029 };
854 1030
855 struct lock_manager_operations { 1031 struct lock_manager_operations {
856 int (*fl_compare_owner)(struct file_lo 1032 int (*fl_compare_owner)(struct file_lock *, struct file_lock *);
857 void (*fl_notify)(struct file_lock *); 1033 void (*fl_notify)(struct file_lock *); /* unblock callback */
858 int (*fl_grant)(struct file_lock *, st 1034 int (*fl_grant)(struct file_lock *, struct file_lock *, int);
859 void (*fl_copy_lock)(struct file_lock 1035 void (*fl_copy_lock)(struct file_lock *, struct file_lock *);
860 void (*fl_release_private)(struct file 1036 void (*fl_release_private)(struct file_lock *);
861 void (*fl_break)(struct file_lock *); 1037 void (*fl_break)(struct file_lock *);
862 int (*fl_mylease)(struct file_lock *, 1038 int (*fl_mylease)(struct file_lock *, struct file_lock *);
863 int (*fl_change)(struct file_lock **, 1039 int (*fl_change)(struct file_lock **, int);
864 }; 1040 };
865 1041
>> 1042 struct lock_manager {
>> 1043 struct list_head list;
>> 1044 };
>> 1045
>> 1046 void locks_start_grace(struct lock_manager *);
>> 1047 void locks_end_grace(struct lock_manager *);
>> 1048 int locks_in_grace(void);
>> 1049
866 /* that will die - we need it for nfs_lock_inf 1050 /* that will die - we need it for nfs_lock_info */
867 #include <linux/nfs_fs_i.h> 1051 #include <linux/nfs_fs_i.h>
868 1052
869 struct file_lock { 1053 struct file_lock {
870 struct file_lock *fl_next; /* sin 1054 struct file_lock *fl_next; /* singly linked list for this inode */
871 struct list_head fl_link; /* dou 1055 struct list_head fl_link; /* doubly linked list of all locks */
872 struct list_head fl_block; /* cir 1056 struct list_head fl_block; /* circular list of blocked processes */
873 fl_owner_t fl_owner; 1057 fl_owner_t fl_owner;
>> 1058 unsigned char fl_flags;
>> 1059 unsigned char fl_type;
874 unsigned int fl_pid; 1060 unsigned int fl_pid;
875 struct pid *fl_nspid; 1061 struct pid *fl_nspid;
876 wait_queue_head_t fl_wait; 1062 wait_queue_head_t fl_wait;
877 struct file *fl_file; 1063 struct file *fl_file;
878 unsigned char fl_flags; <<
879 unsigned char fl_type; <<
880 loff_t fl_start; 1064 loff_t fl_start;
881 loff_t fl_end; 1065 loff_t fl_end;
882 1066
883 struct fasync_struct * fl_fasync; /* 1067 struct fasync_struct * fl_fasync; /* for lease break notifications */
884 unsigned long fl_break_time; /* for 1068 unsigned long fl_break_time; /* for nonblocking lease breaks */
885 1069
886 struct file_lock_operations *fl_ops; 1070 struct file_lock_operations *fl_ops; /* Callbacks for filesystems */
887 struct lock_manager_operations *fl_lmo 1071 struct lock_manager_operations *fl_lmops; /* Callbacks for lockmanagers */
888 union { 1072 union {
889 struct nfs_lock_info nfs_fl 1073 struct nfs_lock_info nfs_fl;
890 struct nfs4_lock_info nfs4_f 1074 struct nfs4_lock_info nfs4_fl;
891 struct { 1075 struct {
892 struct list_head link; 1076 struct list_head link; /* link in AFS vnode's pending_locks list */
893 int state; 1077 int state; /* state of grant or error if -ve */
894 } afs; 1078 } afs;
895 } fl_u; 1079 } fl_u;
896 }; 1080 };
897 1081
898 /* The following constant reflects the upper b 1082 /* The following constant reflects the upper bound of the file/locking space */
899 #ifndef OFFSET_MAX 1083 #ifndef OFFSET_MAX
900 #define INT_LIMIT(x) (~((x)1 << (sizeof(x)* 1084 #define INT_LIMIT(x) (~((x)1 << (sizeof(x)*8 - 1)))
901 #define OFFSET_MAX INT_LIMIT(loff_t) 1085 #define OFFSET_MAX INT_LIMIT(loff_t)
902 #define OFFT_OFFSET_MAX INT_LIMIT(off_t) 1086 #define OFFT_OFFSET_MAX INT_LIMIT(off_t)
903 #endif 1087 #endif
904 1088
905 #include <linux/fcntl.h> 1089 #include <linux/fcntl.h>
906 1090
>> 1091 extern void send_sigio(struct fown_struct *fown, int fd, int band);
>> 1092
>> 1093 /* fs/sync.c */
>> 1094 extern int do_sync_mapping_range(struct address_space *mapping, loff_t offset,
>> 1095 loff_t endbyte, unsigned int flags);
>> 1096
>> 1097 #ifdef CONFIG_FILE_LOCKING
907 extern int fcntl_getlk(struct file *, struct f 1098 extern int fcntl_getlk(struct file *, struct flock __user *);
908 extern int fcntl_setlk(unsigned int, struct fi 1099 extern int fcntl_setlk(unsigned int, struct file *, unsigned int,
909 struct flock __user *) 1100 struct flock __user *);
910 1101
911 #if BITS_PER_LONG == 32 1102 #if BITS_PER_LONG == 32
912 extern int fcntl_getlk64(struct file *, struct 1103 extern int fcntl_getlk64(struct file *, struct flock64 __user *);
913 extern int fcntl_setlk64(unsigned int, struct 1104 extern int fcntl_setlk64(unsigned int, struct file *, unsigned int,
914 struct flock64 __user 1105 struct flock64 __user *);
915 #endif 1106 #endif
916 1107
917 extern void send_sigio(struct fown_struct *fow <<
918 extern int fcntl_setlease(unsigned int fd, str 1108 extern int fcntl_setlease(unsigned int fd, struct file *filp, long arg);
919 extern int fcntl_getlease(struct file *filp); 1109 extern int fcntl_getlease(struct file *filp);
920 1110
921 /* fs/sync.c */ <<
922 extern int do_sync_mapping_range(struct addres <<
923 loff_t endbyte, unsign <<
924 <<
925 /* fs/locks.c */ 1111 /* fs/locks.c */
926 extern void locks_init_lock(struct file_lock * 1112 extern void locks_init_lock(struct file_lock *);
927 extern void locks_copy_lock(struct file_lock * 1113 extern void locks_copy_lock(struct file_lock *, struct file_lock *);
>> 1114 extern void __locks_copy_lock(struct file_lock *, const struct file_lock *);
928 extern void locks_remove_posix(struct file *, 1115 extern void locks_remove_posix(struct file *, fl_owner_t);
929 extern void locks_remove_flock(struct file *); 1116 extern void locks_remove_flock(struct file *);
>> 1117 extern void locks_release_private(struct file_lock *);
930 extern void posix_test_lock(struct file *, str 1118 extern void posix_test_lock(struct file *, struct file_lock *);
931 extern int posix_lock_file(struct file *, stru 1119 extern int posix_lock_file(struct file *, struct file_lock *, struct file_lock *);
932 extern int posix_lock_file_wait(struct file *, 1120 extern int posix_lock_file_wait(struct file *, struct file_lock *);
933 extern int posix_unblock_lock(struct file *, s 1121 extern int posix_unblock_lock(struct file *, struct file_lock *);
934 extern int vfs_test_lock(struct file *, struct 1122 extern int vfs_test_lock(struct file *, struct file_lock *);
935 extern int vfs_lock_file(struct file *, unsign 1123 extern int vfs_lock_file(struct file *, unsigned int, struct file_lock *, struct file_lock *);
936 extern int vfs_cancel_lock(struct file *filp, 1124 extern int vfs_cancel_lock(struct file *filp, struct file_lock *fl);
937 extern int flock_lock_file_wait(struct file *f 1125 extern int flock_lock_file_wait(struct file *filp, struct file_lock *fl);
938 extern int __break_lease(struct inode *inode, 1126 extern int __break_lease(struct inode *inode, unsigned int flags);
939 extern void lease_get_mtime(struct inode *, st 1127 extern void lease_get_mtime(struct inode *, struct timespec *time);
940 extern int generic_setlease(struct file *, lon 1128 extern int generic_setlease(struct file *, long, struct file_lock **);
941 extern int vfs_setlease(struct file *, long, s 1129 extern int vfs_setlease(struct file *, long, struct file_lock **);
942 extern int lease_modify(struct file_lock **, i 1130 extern int lease_modify(struct file_lock **, int);
943 extern int lock_may_read(struct inode *, loff_ 1131 extern int lock_may_read(struct inode *, loff_t start, unsigned long count);
944 extern int lock_may_write(struct inode *, loff 1132 extern int lock_may_write(struct inode *, loff_t start, unsigned long count);
945 extern struct seq_operations locks_seq_operati !! 1133 #else /* !CONFIG_FILE_LOCKING */
>> 1134 static inline int fcntl_getlk(struct file *file, struct flock __user *user)
>> 1135 {
>> 1136 return -EINVAL;
>> 1137 }
>> 1138
>> 1139 static inline int fcntl_setlk(unsigned int fd, struct file *file,
>> 1140 unsigned int cmd, struct flock __user *user)
>> 1141 {
>> 1142 return -EACCES;
>> 1143 }
>> 1144
>> 1145 #if BITS_PER_LONG == 32
>> 1146 static inline int fcntl_getlk64(struct file *file, struct flock64 __user *user)
>> 1147 {
>> 1148 return -EINVAL;
>> 1149 }
>> 1150
>> 1151 static inline int fcntl_setlk64(unsigned int fd, struct file *file,
>> 1152 unsigned int cmd, struct flock64 __user *user)
>> 1153 {
>> 1154 return -EACCES;
>> 1155 }
>> 1156 #endif
>> 1157 static inline int fcntl_setlease(unsigned int fd, struct file *filp, long arg)
>> 1158 {
>> 1159 return 0;
>> 1160 }
>> 1161
>> 1162 static inline int fcntl_getlease(struct file *filp)
>> 1163 {
>> 1164 return 0;
>> 1165 }
>> 1166
>> 1167 static inline void locks_init_lock(struct file_lock *fl)
>> 1168 {
>> 1169 return;
>> 1170 }
>> 1171
>> 1172 static inline void __locks_copy_lock(struct file_lock *new, struct file_lock *fl)
>> 1173 {
>> 1174 return;
>> 1175 }
>> 1176
>> 1177 static inline void locks_copy_lock(struct file_lock *new, struct file_lock *fl)
>> 1178 {
>> 1179 return;
>> 1180 }
>> 1181
>> 1182 static inline void locks_remove_posix(struct file *filp, fl_owner_t owner)
>> 1183 {
>> 1184 return;
>> 1185 }
>> 1186
>> 1187 static inline void locks_remove_flock(struct file *filp)
>> 1188 {
>> 1189 return;
>> 1190 }
>> 1191
>> 1192 static inline void posix_test_lock(struct file *filp, struct file_lock *fl)
>> 1193 {
>> 1194 return;
>> 1195 }
>> 1196
>> 1197 static inline int posix_lock_file(struct file *filp, struct file_lock *fl,
>> 1198 struct file_lock *conflock)
>> 1199 {
>> 1200 return -ENOLCK;
>> 1201 }
>> 1202
>> 1203 static inline int posix_lock_file_wait(struct file *filp, struct file_lock *fl)
>> 1204 {
>> 1205 return -ENOLCK;
>> 1206 }
>> 1207
>> 1208 static inline int posix_unblock_lock(struct file *filp,
>> 1209 struct file_lock *waiter)
>> 1210 {
>> 1211 return -ENOENT;
>> 1212 }
>> 1213
>> 1214 static inline int vfs_test_lock(struct file *filp, struct file_lock *fl)
>> 1215 {
>> 1216 return 0;
>> 1217 }
>> 1218
>> 1219 static inline int vfs_lock_file(struct file *filp, unsigned int cmd,
>> 1220 struct file_lock *fl, struct file_lock *conf)
>> 1221 {
>> 1222 return -ENOLCK;
>> 1223 }
>> 1224
>> 1225 static inline int vfs_cancel_lock(struct file *filp, struct file_lock *fl)
>> 1226 {
>> 1227 return 0;
>> 1228 }
>> 1229
>> 1230 static inline int flock_lock_file_wait(struct file *filp,
>> 1231 struct file_lock *request)
>> 1232 {
>> 1233 return -ENOLCK;
>> 1234 }
>> 1235
>> 1236 static inline int __break_lease(struct inode *inode, unsigned int mode)
>> 1237 {
>> 1238 return 0;
>> 1239 }
>> 1240
>> 1241 static inline void lease_get_mtime(struct inode *inode, struct timespec *time)
>> 1242 {
>> 1243 return;
>> 1244 }
>> 1245
>> 1246 static inline int generic_setlease(struct file *filp, long arg,
>> 1247 struct file_lock **flp)
>> 1248 {
>> 1249 return -EINVAL;
>> 1250 }
>> 1251
>> 1252 static inline int vfs_setlease(struct file *filp, long arg,
>> 1253 struct file_lock **lease)
>> 1254 {
>> 1255 return -EINVAL;
>> 1256 }
>> 1257
>> 1258 static inline int lease_modify(struct file_lock **before, int arg)
>> 1259 {
>> 1260 return -EINVAL;
>> 1261 }
>> 1262
>> 1263 static inline int lock_may_read(struct inode *inode, loff_t start,
>> 1264 unsigned long len)
>> 1265 {
>> 1266 return 1;
>> 1267 }
>> 1268
>> 1269 static inline int lock_may_write(struct inode *inode, loff_t start,
>> 1270 unsigned long len)
>> 1271 {
>> 1272 return 1;
>> 1273 }
>> 1274
>> 1275 #endif /* !CONFIG_FILE_LOCKING */
>> 1276
946 1277
947 struct fasync_struct { 1278 struct fasync_struct {
948 int magic; 1279 int magic;
949 int fa_fd; 1280 int fa_fd;
950 struct fasync_struct *fa_next; /* s 1281 struct fasync_struct *fa_next; /* singly linked list */
951 struct file *fa_file; 1282 struct file *fa_file;
952 }; 1283 };
953 1284
954 #define FASYNC_MAGIC 0x4601 1285 #define FASYNC_MAGIC 0x4601
955 1286
956 /* SMP safe fasync helpers: */ 1287 /* SMP safe fasync helpers: */
957 extern int fasync_helper(int, struct file *, i 1288 extern int fasync_helper(int, struct file *, int, struct fasync_struct **);
958 /* can be called from interrupts */ 1289 /* can be called from interrupts */
959 extern void kill_fasync(struct fasync_struct * 1290 extern void kill_fasync(struct fasync_struct **, int, int);
960 /* only for net: no internal synchronization * 1291 /* only for net: no internal synchronization */
961 extern void __kill_fasync(struct fasync_struct 1292 extern void __kill_fasync(struct fasync_struct *, int, int);
962 1293
963 extern int __f_setown(struct file *filp, struc 1294 extern int __f_setown(struct file *filp, struct pid *, enum pid_type, int force);
964 extern int f_setown(struct file *filp, unsigne 1295 extern int f_setown(struct file *filp, unsigned long arg, int force);
965 extern void f_delown(struct file *filp); 1296 extern void f_delown(struct file *filp);
966 extern pid_t f_getown(struct file *filp); 1297 extern pid_t f_getown(struct file *filp);
967 extern int send_sigurg(struct fown_struct *fow 1298 extern int send_sigurg(struct fown_struct *fown);
968 1299
969 /* 1300 /*
970 * Umount options 1301 * Umount options
971 */ 1302 */
972 1303
973 #define MNT_FORCE 0x00000001 /* Att 1304 #define MNT_FORCE 0x00000001 /* Attempt to forcibily umount */
974 #define MNT_DETACH 0x00000002 /* Jus 1305 #define MNT_DETACH 0x00000002 /* Just detach from the tree */
975 #define MNT_EXPIRE 0x00000004 /* Mar 1306 #define MNT_EXPIRE 0x00000004 /* Mark for expiry */
976 1307
977 extern struct list_head super_blocks; 1308 extern struct list_head super_blocks;
978 extern spinlock_t sb_lock; 1309 extern spinlock_t sb_lock;
979 1310
>> 1311 #define sb_entry(list) list_entry((list), struct super_block, s_list)
980 #define S_BIAS (1<<30) 1312 #define S_BIAS (1<<30)
981 struct super_block { 1313 struct super_block {
982 struct list_head s_list; 1314 struct list_head s_list; /* Keep this first */
983 dev_t s_dev; 1315 dev_t s_dev; /* search index; _not_ kdev_t */
984 unsigned long s_blocksize; 1316 unsigned long s_blocksize;
985 unsigned char s_blocksize_bi 1317 unsigned char s_blocksize_bits;
986 unsigned char s_dirt; 1318 unsigned char s_dirt;
987 unsigned long long s_maxbytes; 1319 unsigned long long s_maxbytes; /* Max file size */
988 struct file_system_type *s_type; 1320 struct file_system_type *s_type;
989 const struct super_operations *s_op; 1321 const struct super_operations *s_op;
990 struct dquot_operations *dq_op; 1322 struct dquot_operations *dq_op;
991 struct quotactl_ops *s_qcop; 1323 struct quotactl_ops *s_qcop;
992 const struct export_operations *s_expo 1324 const struct export_operations *s_export_op;
993 unsigned long s_flags; 1325 unsigned long s_flags;
994 unsigned long s_magic; 1326 unsigned long s_magic;
995 struct dentry *s_root; 1327 struct dentry *s_root;
996 struct rw_semaphore s_umount; 1328 struct rw_semaphore s_umount;
997 struct mutex s_lock; 1329 struct mutex s_lock;
998 int s_count; 1330 int s_count;
999 int s_syncing; !! 1331 int s_need_sync;
1000 int s_need_sync_f <<
1001 atomic_t s_active; 1332 atomic_t s_active;
1002 #ifdef CONFIG_SECURITY 1333 #ifdef CONFIG_SECURITY
1003 void *s_security; 1334 void *s_security;
1004 #endif 1335 #endif
1005 struct xattr_handler **s_xattr; 1336 struct xattr_handler **s_xattr;
1006 1337
1007 struct list_head s_inodes; 1338 struct list_head s_inodes; /* all inodes */
1008 struct list_head s_dirty; 1339 struct list_head s_dirty; /* dirty inodes */
1009 struct list_head s_io; 1340 struct list_head s_io; /* parked for writeback */
1010 struct list_head s_more_io; 1341 struct list_head s_more_io; /* parked for more writeback */
1011 struct hlist_head s_anon; 1342 struct hlist_head s_anon; /* anonymous dentries for (nfs) exporting */
1012 struct list_head s_files; 1343 struct list_head s_files;
>> 1344 /* s_dentry_lru and s_nr_dentry_unused are protected by dcache_lock */
>> 1345 struct list_head s_dentry_lru; /* unused dentry lru */
>> 1346 int s_nr_dentry_unused; /* # of dentry on lru */
1013 1347
1014 struct block_device *s_bdev; 1348 struct block_device *s_bdev;
1015 struct mtd_info *s_mtd; 1349 struct mtd_info *s_mtd;
1016 struct list_head s_instances; 1350 struct list_head s_instances;
1017 struct quota_info s_dquot; 1351 struct quota_info s_dquot; /* Diskquota specific options */
1018 1352
1019 int s_frozen; 1353 int s_frozen;
1020 wait_queue_head_t s_wait_unfroz 1354 wait_queue_head_t s_wait_unfrozen;
1021 1355
1022 char s_id[32]; 1356 char s_id[32]; /* Informational name */
1023 1357
1024 void *s_fs_info; 1358 void *s_fs_info; /* Filesystem private info */
>> 1359 fmode_t s_mode;
1025 1360
1026 /* 1361 /*
1027 * The next field is for VFS *only*. 1362 * The next field is for VFS *only*. No filesystems have any business
1028 * even looking at it. You had been w 1363 * even looking at it. You had been warned.
1029 */ 1364 */
1030 struct mutex s_vfs_rename_mutex; 1365 struct mutex s_vfs_rename_mutex; /* Kludge */
1031 1366
1032 /* Granularity of c/m/atime in ns. 1367 /* Granularity of c/m/atime in ns.
1033 Cannot be worse than a second */ 1368 Cannot be worse than a second */
1034 u32 s_time_gran; 1369 u32 s_time_gran;
1035 1370
1036 /* 1371 /*
1037 * Filesystem subtype. If non-empty 1372 * Filesystem subtype. If non-empty the filesystem type field
1038 * in /proc/mounts will be "type.subt 1373 * in /proc/mounts will be "type.subtype"
1039 */ 1374 */
1040 char *s_subtype; 1375 char *s_subtype;
1041 1376
1042 /* 1377 /*
1043 * Saved mount options for lazy files 1378 * Saved mount options for lazy filesystems using
1044 * generic_show_options() 1379 * generic_show_options()
1045 */ 1380 */
1046 char *s_options; 1381 char *s_options;
1047 }; 1382 };
1048 1383
1049 extern struct timespec current_fs_time(struct 1384 extern struct timespec current_fs_time(struct super_block *sb);
1050 1385
1051 /* 1386 /*
1052 * Snapshotting support. 1387 * Snapshotting support.
1053 */ 1388 */
1054 enum { 1389 enum {
1055 SB_UNFROZEN = 0, 1390 SB_UNFROZEN = 0,
1056 SB_FREEZE_WRITE = 1, 1391 SB_FREEZE_WRITE = 1,
1057 SB_FREEZE_TRANS = 2, 1392 SB_FREEZE_TRANS = 2,
1058 }; 1393 };
1059 1394
1060 #define vfs_check_frozen(sb, level) \ 1395 #define vfs_check_frozen(sb, level) \
1061 wait_event((sb)->s_wait_unfrozen, ((s 1396 wait_event((sb)->s_wait_unfrozen, ((sb)->s_frozen < (level)))
1062 1397
1063 #define get_fs_excl() atomic_inc(¤t->fs 1398 #define get_fs_excl() atomic_inc(¤t->fs_excl)
1064 #define put_fs_excl() atomic_dec(¤t->fs 1399 #define put_fs_excl() atomic_dec(¤t->fs_excl)
1065 #define has_fs_excl() atomic_read(¤t->f 1400 #define has_fs_excl() atomic_read(¤t->fs_excl)
1066 1401
1067 #define is_owner_or_cap(inode) \ 1402 #define is_owner_or_cap(inode) \
1068 ((current->fsuid == (inode)->i_uid) | !! 1403 ((current_fsuid() == (inode)->i_uid) || capable(CAP_FOWNER))
1069 1404
1070 /* not quite ready to be deprecated, but... * 1405 /* not quite ready to be deprecated, but... */
1071 extern void lock_super(struct super_block *); 1406 extern void lock_super(struct super_block *);
1072 extern void unlock_super(struct super_block * 1407 extern void unlock_super(struct super_block *);
1073 1408
1074 /* 1409 /*
1075 * VFS helper functions.. 1410 * VFS helper functions..
1076 */ 1411 */
1077 extern int vfs_permission(struct nameidata *, <<
1078 extern int vfs_create(struct inode *, struct 1412 extern int vfs_create(struct inode *, struct dentry *, int, struct nameidata *);
1079 extern int vfs_mkdir(struct inode *, struct d 1413 extern int vfs_mkdir(struct inode *, struct dentry *, int);
1080 extern int vfs_mknod(struct inode *, struct d 1414 extern int vfs_mknod(struct inode *, struct dentry *, int, dev_t);
1081 extern int vfs_symlink(struct inode *, struct !! 1415 extern int vfs_symlink(struct inode *, struct dentry *, const char *);
1082 extern int vfs_link(struct dentry *, struct i 1416 extern int vfs_link(struct dentry *, struct inode *, struct dentry *);
1083 extern int vfs_rmdir(struct inode *, struct d 1417 extern int vfs_rmdir(struct inode *, struct dentry *);
1084 extern int vfs_unlink(struct inode *, struct 1418 extern int vfs_unlink(struct inode *, struct dentry *);
1085 extern int vfs_rename(struct inode *, struct 1419 extern int vfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *);
1086 1420
1087 /* 1421 /*
1088 * VFS dentry helper functions. 1422 * VFS dentry helper functions.
1089 */ 1423 */
1090 extern void dentry_unhash(struct dentry *dent 1424 extern void dentry_unhash(struct dentry *dentry);
1091 1425
1092 /* 1426 /*
1093 * VFS file helper functions. 1427 * VFS file helper functions.
1094 */ 1428 */
1095 extern int file_permission(struct file *, int 1429 extern int file_permission(struct file *, int);
1096 1430
1097 /* 1431 /*
>> 1432 * VFS FS_IOC_FIEMAP helper definitions.
>> 1433 */
>> 1434 struct fiemap_extent_info {
>> 1435 unsigned int fi_flags; /* Flags as passed from user */
>> 1436 unsigned int fi_extents_mapped; /* Number of mapped extents */
>> 1437 unsigned int fi_extents_max; /* Size of fiemap_extent array */
>> 1438 struct fiemap_extent *fi_extents_start; /* Start of fiemap_extent
>> 1439 * array */
>> 1440 };
>> 1441 int fiemap_fill_next_extent(struct fiemap_extent_info *info, u64 logical,
>> 1442 u64 phys, u64 len, u32 flags);
>> 1443 int fiemap_check_flags(struct fiemap_extent_info *fieinfo, u32 fs_flags);
>> 1444
>> 1445 /*
1098 * File types 1446 * File types
1099 * 1447 *
1100 * NOTE! These match bits 12..15 of stat.st_m 1448 * NOTE! These match bits 12..15 of stat.st_mode
1101 * (ie "(i_mode >> 12) & 15"). 1449 * (ie "(i_mode >> 12) & 15").
1102 */ 1450 */
1103 #define DT_UNKNOWN 0 1451 #define DT_UNKNOWN 0
1104 #define DT_FIFO 1 1452 #define DT_FIFO 1
1105 #define DT_CHR 2 1453 #define DT_CHR 2
1106 #define DT_DIR 4 1454 #define DT_DIR 4
1107 #define DT_BLK 6 1455 #define DT_BLK 6
1108 #define DT_REG 8 1456 #define DT_REG 8
1109 #define DT_LNK 10 1457 #define DT_LNK 10
1110 #define DT_SOCK 12 1458 #define DT_SOCK 12
1111 #define DT_WHT 14 1459 #define DT_WHT 14
1112 1460
1113 #define OSYNC_METADATA (1<<0) 1461 #define OSYNC_METADATA (1<<0)
1114 #define OSYNC_DATA (1<<1) 1462 #define OSYNC_DATA (1<<1)
1115 #define OSYNC_INODE (1<<2) 1463 #define OSYNC_INODE (1<<2)
1116 int generic_osync_inode(struct inode *, struc 1464 int generic_osync_inode(struct inode *, struct address_space *, int);
1117 1465
1118 /* 1466 /*
1119 * This is the "filldir" function type, used 1467 * This is the "filldir" function type, used by readdir() to let
1120 * the kernel specify what kind of dirent lay 1468 * the kernel specify what kind of dirent layout it wants to have.
1121 * This allows the kernel to read directories 1469 * This allows the kernel to read directories into kernel space or
1122 * to have different dirent layouts depending 1470 * to have different dirent layouts depending on the binary type.
1123 */ 1471 */
1124 typedef int (*filldir_t)(void *, const char * 1472 typedef int (*filldir_t)(void *, const char *, int, loff_t, u64, unsigned);
1125 !! 1473 struct block_device_operations;
1126 struct block_device_operations { <<
1127 int (*open) (struct inode *, struct f <<
1128 int (*release) (struct inode *, struc <<
1129 int (*ioctl) (struct inode *, struct <<
1130 long (*unlocked_ioctl) (struct file * <<
1131 long (*compat_ioctl) (struct file *, <<
1132 int (*direct_access) (struct block_de <<
1133 int (*media_changed) (struct gendisk <<
1134 int (*revalidate_disk) (struct gendis <<
1135 int (*getgeo)(struct block_device *, <<
1136 struct module *owner; <<
1137 }; <<
1138 <<
1139 /* <<
1140 * "descriptor" for what we're up to with a r <<
1141 * This allows us to use the same read code y <<
1142 * have multiple different users of the data <<
1143 * we read from a file. <<
1144 * <<
1145 * The simplest case just copies the data to <<
1146 * mode. <<
1147 */ <<
1148 typedef struct { <<
1149 size_t written; <<
1150 size_t count; <<
1151 union { <<
1152 char __user * buf; <<
1153 void *data; <<
1154 } arg; <<
1155 int error; <<
1156 } read_descriptor_t; <<
1157 <<
1158 typedef int (*read_actor_t)(read_descriptor_t <<
1159 1474
1160 /* These macros are for out of kernel modules 1475 /* These macros are for out of kernel modules to test that
1161 * the kernel supports the unlocked_ioctl and 1476 * the kernel supports the unlocked_ioctl and compat_ioctl
1162 * fields in struct file_operations. */ 1477 * fields in struct file_operations. */
1163 #define HAVE_COMPAT_IOCTL 1 1478 #define HAVE_COMPAT_IOCTL 1
1164 #define HAVE_UNLOCKED_IOCTL 1 1479 #define HAVE_UNLOCKED_IOCTL 1
1165 1480
1166 /* 1481 /*
1167 * NOTE: 1482 * NOTE:
1168 * read, write, poll, fsync, readv, writev, u 1483 * read, write, poll, fsync, readv, writev, unlocked_ioctl and compat_ioctl
1169 * can be called without the big kernel lock 1484 * can be called without the big kernel lock held in all filesystems.
1170 */ 1485 */
1171 struct file_operations { 1486 struct file_operations {
1172 struct module *owner; 1487 struct module *owner;
1173 loff_t (*llseek) (struct file *, loff 1488 loff_t (*llseek) (struct file *, loff_t, int);
1174 ssize_t (*read) (struct file *, char 1489 ssize_t (*read) (struct file *, char __user *, size_t, loff_t *);
1175 ssize_t (*write) (struct file *, cons 1490 ssize_t (*write) (struct file *, const char __user *, size_t, loff_t *);
1176 ssize_t (*aio_read) (struct kiocb *, 1491 ssize_t (*aio_read) (struct kiocb *, const struct iovec *, unsigned long, loff_t);
1177 ssize_t (*aio_write) (struct kiocb *, 1492 ssize_t (*aio_write) (struct kiocb *, const struct iovec *, unsigned long, loff_t);
1178 int (*readdir) (struct file *, void * 1493 int (*readdir) (struct file *, void *, filldir_t);
1179 unsigned int (*poll) (struct file *, 1494 unsigned int (*poll) (struct file *, struct poll_table_struct *);
1180 int (*ioctl) (struct inode *, struct 1495 int (*ioctl) (struct inode *, struct file *, unsigned int, unsigned long);
1181 long (*unlocked_ioctl) (struct file * 1496 long (*unlocked_ioctl) (struct file *, unsigned int, unsigned long);
1182 long (*compat_ioctl) (struct file *, 1497 long (*compat_ioctl) (struct file *, unsigned int, unsigned long);
1183 int (*mmap) (struct file *, struct vm 1498 int (*mmap) (struct file *, struct vm_area_struct *);
1184 int (*open) (struct inode *, struct f 1499 int (*open) (struct inode *, struct file *);
1185 int (*flush) (struct file *, fl_owner 1500 int (*flush) (struct file *, fl_owner_t id);
1186 int (*release) (struct inode *, struc 1501 int (*release) (struct inode *, struct file *);
1187 int (*fsync) (struct file *, struct d 1502 int (*fsync) (struct file *, struct dentry *, int datasync);
1188 int (*aio_fsync) (struct kiocb *, int 1503 int (*aio_fsync) (struct kiocb *, int datasync);
1189 int (*fasync) (int, struct file *, in 1504 int (*fasync) (int, struct file *, int);
1190 int (*lock) (struct file *, int, stru 1505 int (*lock) (struct file *, int, struct file_lock *);
1191 ssize_t (*sendpage) (struct file *, s 1506 ssize_t (*sendpage) (struct file *, struct page *, int, size_t, loff_t *, int);
1192 unsigned long (*get_unmapped_area)(st 1507 unsigned long (*get_unmapped_area)(struct file *, unsigned long, unsigned long, unsigned long, unsigned long);
1193 int (*check_flags)(int); 1508 int (*check_flags)(int);
1194 int (*dir_notify)(struct file *filp, <<
1195 int (*flock) (struct file *, int, str 1509 int (*flock) (struct file *, int, struct file_lock *);
1196 ssize_t (*splice_write)(struct pipe_i 1510 ssize_t (*splice_write)(struct pipe_inode_info *, struct file *, loff_t *, size_t, unsigned int);
1197 ssize_t (*splice_read)(struct file *, 1511 ssize_t (*splice_read)(struct file *, loff_t *, struct pipe_inode_info *, size_t, unsigned int);
1198 int (*setlease)(struct file *, long, 1512 int (*setlease)(struct file *, long, struct file_lock **);
1199 }; 1513 };
1200 1514
1201 struct inode_operations { 1515 struct inode_operations {
1202 int (*create) (struct inode *,struct 1516 int (*create) (struct inode *,struct dentry *,int, struct nameidata *);
1203 struct dentry * (*lookup) (struct ino 1517 struct dentry * (*lookup) (struct inode *,struct dentry *, struct nameidata *);
1204 int (*link) (struct dentry *,struct i 1518 int (*link) (struct dentry *,struct inode *,struct dentry *);
1205 int (*unlink) (struct inode *,struct 1519 int (*unlink) (struct inode *,struct dentry *);
1206 int (*symlink) (struct inode *,struct 1520 int (*symlink) (struct inode *,struct dentry *,const char *);
1207 int (*mkdir) (struct inode *,struct d 1521 int (*mkdir) (struct inode *,struct dentry *,int);
1208 int (*rmdir) (struct inode *,struct d 1522 int (*rmdir) (struct inode *,struct dentry *);
1209 int (*mknod) (struct inode *,struct d 1523 int (*mknod) (struct inode *,struct dentry *,int,dev_t);
1210 int (*rename) (struct inode *, struct 1524 int (*rename) (struct inode *, struct dentry *,
1211 struct inode *, struc 1525 struct inode *, struct dentry *);
1212 int (*readlink) (struct dentry *, cha 1526 int (*readlink) (struct dentry *, char __user *,int);
1213 void * (*follow_link) (struct dentry 1527 void * (*follow_link) (struct dentry *, struct nameidata *);
1214 void (*put_link) (struct dentry *, st 1528 void (*put_link) (struct dentry *, struct nameidata *, void *);
1215 void (*truncate) (struct inode *); 1529 void (*truncate) (struct inode *);
1216 int (*permission) (struct inode *, in !! 1530 int (*permission) (struct inode *, int);
1217 int (*setattr) (struct dentry *, stru 1531 int (*setattr) (struct dentry *, struct iattr *);
1218 int (*getattr) (struct vfsmount *mnt, 1532 int (*getattr) (struct vfsmount *mnt, struct dentry *, struct kstat *);
1219 int (*setxattr) (struct dentry *, con 1533 int (*setxattr) (struct dentry *, const char *,const void *,size_t,int);
1220 ssize_t (*getxattr) (struct dentry *, 1534 ssize_t (*getxattr) (struct dentry *, const char *, void *, size_t);
1221 ssize_t (*listxattr) (struct dentry * 1535 ssize_t (*listxattr) (struct dentry *, char *, size_t);
1222 int (*removexattr) (struct dentry *, 1536 int (*removexattr) (struct dentry *, const char *);
1223 void (*truncate_range)(struct inode * 1537 void (*truncate_range)(struct inode *, loff_t, loff_t);
1224 long (*fallocate)(struct inode *inode 1538 long (*fallocate)(struct inode *inode, int mode, loff_t offset,
1225 loff_t len); 1539 loff_t len);
>> 1540 int (*fiemap)(struct inode *, struct fiemap_extent_info *, u64 start,
>> 1541 u64 len);
1226 }; 1542 };
1227 1543
1228 struct seq_file; 1544 struct seq_file;
1229 1545
1230 ssize_t rw_copy_check_uvector(int type, const 1546 ssize_t rw_copy_check_uvector(int type, const struct iovec __user * uvector,
1231 unsigned long 1547 unsigned long nr_segs, unsigned long fast_segs,
1232 struct iovec 1548 struct iovec *fast_pointer,
1233 struct iovec 1549 struct iovec **ret_pointer);
1234 1550
1235 extern ssize_t vfs_read(struct file *, char _ 1551 extern ssize_t vfs_read(struct file *, char __user *, size_t, loff_t *);
1236 extern ssize_t vfs_write(struct file *, const 1552 extern ssize_t vfs_write(struct file *, const char __user *, size_t, loff_t *);
1237 extern ssize_t vfs_readv(struct file *, const 1553 extern ssize_t vfs_readv(struct file *, const struct iovec __user *,
1238 unsigned long, loff_t *); 1554 unsigned long, loff_t *);
1239 extern ssize_t vfs_writev(struct file *, cons 1555 extern ssize_t vfs_writev(struct file *, const struct iovec __user *,
1240 unsigned long, loff_t *); 1556 unsigned long, loff_t *);
1241 1557
1242 /* <<
1243 * NOTE: write_inode, delete_inode, clear_ino <<
1244 * without the big kernel lock held in all fi <<
1245 */ <<
1246 struct super_operations { 1558 struct super_operations {
1247 struct inode *(*alloc_inode)(struct s 1559 struct inode *(*alloc_inode)(struct super_block *sb);
1248 void (*destroy_inode)(struct inode *) 1560 void (*destroy_inode)(struct inode *);
1249 1561
1250 void (*dirty_inode) (struct inode *); 1562 void (*dirty_inode) (struct inode *);
1251 int (*write_inode) (struct inode *, i 1563 int (*write_inode) (struct inode *, int);
1252 void (*put_inode) (struct inode *); <<
1253 void (*drop_inode) (struct inode *); 1564 void (*drop_inode) (struct inode *);
1254 void (*delete_inode) (struct inode *) 1565 void (*delete_inode) (struct inode *);
1255 void (*put_super) (struct super_block 1566 void (*put_super) (struct super_block *);
1256 void (*write_super) (struct super_blo 1567 void (*write_super) (struct super_block *);
1257 int (*sync_fs)(struct super_block *sb 1568 int (*sync_fs)(struct super_block *sb, int wait);
1258 void (*write_super_lockfs) (struct su !! 1569 int (*freeze_fs) (struct super_block *);
1259 void (*unlockfs) (struct super_block !! 1570 int (*unfreeze_fs) (struct super_block *);
1260 int (*statfs) (struct dentry *, struc 1571 int (*statfs) (struct dentry *, struct kstatfs *);
1261 int (*remount_fs) (struct super_block 1572 int (*remount_fs) (struct super_block *, int *, char *);
1262 void (*clear_inode) (struct inode *); 1573 void (*clear_inode) (struct inode *);
1263 void (*umount_begin) (struct vfsmount !! 1574 void (*umount_begin) (struct super_block *);
1264 1575
1265 int (*show_options)(struct seq_file * 1576 int (*show_options)(struct seq_file *, struct vfsmount *);
1266 int (*show_stats)(struct seq_file *, 1577 int (*show_stats)(struct seq_file *, struct vfsmount *);
1267 #ifdef CONFIG_QUOTA 1578 #ifdef CONFIG_QUOTA
1268 ssize_t (*quota_read)(struct super_bl 1579 ssize_t (*quota_read)(struct super_block *, int, char *, size_t, loff_t);
1269 ssize_t (*quota_write)(struct super_b 1580 ssize_t (*quota_write)(struct super_block *, int, const char *, size_t, loff_t);
1270 #endif 1581 #endif
>> 1582 int (*bdev_try_to_free_page)(struct super_block*, struct page*, gfp_t);
1271 }; 1583 };
1272 1584
1273 /* 1585 /*
1274 * Inode state bits. Protected by inode_lock 1586 * Inode state bits. Protected by inode_lock.
1275 * 1587 *
1276 * Three bits determine the dirty state of th 1588 * Three bits determine the dirty state of the inode, I_DIRTY_SYNC,
1277 * I_DIRTY_DATASYNC and I_DIRTY_PAGES. 1589 * I_DIRTY_DATASYNC and I_DIRTY_PAGES.
1278 * 1590 *
1279 * Four bits define the lifetime of an inode. 1591 * Four bits define the lifetime of an inode. Initially, inodes are I_NEW,
1280 * until that flag is cleared. I_WILL_FREE, 1592 * until that flag is cleared. I_WILL_FREE, I_FREEING and I_CLEAR are set at
1281 * various stages of removing an inode. 1593 * various stages of removing an inode.
1282 * 1594 *
1283 * Two bits are used for locking and completi 1595 * Two bits are used for locking and completion notification, I_LOCK and I_SYNC.
1284 * 1596 *
1285 * I_DIRTY_SYNC Inode is dirty, but d 1597 * I_DIRTY_SYNC Inode is dirty, but doesn't have to be written on
1286 * fdatasync(). i_atime 1598 * fdatasync(). i_atime is the usual cause.
1287 * I_DIRTY_DATASYNC Data-related inode ch 1599 * I_DIRTY_DATASYNC Data-related inode changes pending. We keep track of
1288 * these changes separat 1600 * these changes separately from I_DIRTY_SYNC so that we
1289 * don't have to write i 1601 * don't have to write inode on fdatasync() when only
1290 * mtime has changed in 1602 * mtime has changed in it.
1291 * I_DIRTY_PAGES Inode has dirty pages 1603 * I_DIRTY_PAGES Inode has dirty pages. Inode itself may be clean.
1292 * I_NEW get_new_inode() sets 1604 * I_NEW get_new_inode() sets i_state to I_LOCK|I_NEW. Both
1293 * are cleared by unlock 1605 * are cleared by unlock_new_inode(), called from iget().
1294 * I_WILL_FREE Must be set when call 1606 * I_WILL_FREE Must be set when calling write_inode_now() if i_count
1295 * is zero. I_FREEING m 1607 * is zero. I_FREEING must be set when I_WILL_FREE is
1296 * cleared. 1608 * cleared.
1297 * I_FREEING Set when inode is abo 1609 * I_FREEING Set when inode is about to be freed but still has dirty
1298 * pages or buffers atta 1610 * pages or buffers attached or the inode itself is still
1299 * dirty. 1611 * dirty.
1300 * I_CLEAR Set by clear_inode(). 1612 * I_CLEAR Set by clear_inode(). In this state the inode is clean
1301 * and can be destroyed. 1613 * and can be destroyed.
1302 * 1614 *
1303 * Inodes that are I_WIL 1615 * Inodes that are I_WILL_FREE, I_FREEING or I_CLEAR are
1304 * prohibited for many p 1616 * prohibited for many purposes. iget() must wait for
1305 * the inode to be compl 1617 * the inode to be completely released, then create it
1306 * anew. Other function 1618 * anew. Other functions will just ignore such inodes,
1307 * if appropriate. I_LO 1619 * if appropriate. I_LOCK is used for waiting.
1308 * 1620 *
1309 * I_LOCK Serves as both a mute 1621 * I_LOCK Serves as both a mutex and completion notification.
1310 * New inodes set I_LOCK 1622 * New inodes set I_LOCK. If two processes both create
1311 * the same inode, one o 1623 * the same inode, one of them will release its inode and
1312 * wait for I_LOCK to be 1624 * wait for I_LOCK to be released before returning.
1313 * Inodes in I_WILL_FREE 1625 * Inodes in I_WILL_FREE, I_FREEING or I_CLEAR state can
1314 * also cause waiting on 1626 * also cause waiting on I_LOCK, without I_LOCK actually
1315 * being set. find_inod 1627 * being set. find_inode() uses this to prevent returning
1316 * nearly-dead inodes. 1628 * nearly-dead inodes.
1317 * I_SYNC Similar to I_LOCK, bu 1629 * I_SYNC Similar to I_LOCK, but limited in scope to writeback
1318 * of inode dirty data. 1630 * of inode dirty data. Having a separate lock for this
1319 * purpose reduces laten 1631 * purpose reduces latency and prevents some filesystem-
1320 * specific deadlocks. 1632 * specific deadlocks.
1321 * 1633 *
1322 * Q: What is the difference between I_WILL_F 1634 * Q: What is the difference between I_WILL_FREE and I_FREEING?
1323 * Q: igrab() only checks on (I_FREEING|I_WIL 1635 * Q: igrab() only checks on (I_FREEING|I_WILL_FREE). Should it also check on
1324 * I_CLEAR? If not, why? 1636 * I_CLEAR? If not, why?
1325 */ 1637 */
1326 #define I_DIRTY_SYNC 1 1638 #define I_DIRTY_SYNC 1
1327 #define I_DIRTY_DATASYNC 2 1639 #define I_DIRTY_DATASYNC 2
1328 #define I_DIRTY_PAGES 4 1640 #define I_DIRTY_PAGES 4
1329 #define I_NEW 8 1641 #define I_NEW 8
1330 #define I_WILL_FREE 16 1642 #define I_WILL_FREE 16
1331 #define I_FREEING 32 1643 #define I_FREEING 32
1332 #define I_CLEAR 64 1644 #define I_CLEAR 64
1333 #define __I_LOCK 7 1645 #define __I_LOCK 7
1334 #define I_LOCK (1 << __I_LOC 1646 #define I_LOCK (1 << __I_LOCK)
1335 #define __I_SYNC 8 1647 #define __I_SYNC 8
1336 #define I_SYNC (1 << __I_SYN 1648 #define I_SYNC (1 << __I_SYNC)
1337 1649
1338 #define I_DIRTY (I_DIRTY_SYNC | I_DIRTY_DATAS 1650 #define I_DIRTY (I_DIRTY_SYNC | I_DIRTY_DATASYNC | I_DIRTY_PAGES)
1339 1651
1340 extern void __mark_inode_dirty(struct inode * 1652 extern void __mark_inode_dirty(struct inode *, int);
1341 static inline void mark_inode_dirty(struct in 1653 static inline void mark_inode_dirty(struct inode *inode)
1342 { 1654 {
1343 __mark_inode_dirty(inode, I_DIRTY); 1655 __mark_inode_dirty(inode, I_DIRTY);
1344 } 1656 }
1345 1657
1346 static inline void mark_inode_dirty_sync(stru 1658 static inline void mark_inode_dirty_sync(struct inode *inode)
1347 { 1659 {
1348 __mark_inode_dirty(inode, I_DIRTY_SYN 1660 __mark_inode_dirty(inode, I_DIRTY_SYNC);
1349 } 1661 }
1350 1662
1351 /** 1663 /**
1352 * inc_nlink - directly increment an inode's 1664 * inc_nlink - directly increment an inode's link count
1353 * @inode: inode 1665 * @inode: inode
1354 * 1666 *
1355 * This is a low-level filesystem helper to r 1667 * This is a low-level filesystem helper to replace any
1356 * direct filesystem manipulation of i_nlink. 1668 * direct filesystem manipulation of i_nlink. Currently,
1357 * it is only here for parity with dec_nlink( 1669 * it is only here for parity with dec_nlink().
1358 */ 1670 */
1359 static inline void inc_nlink(struct inode *in 1671 static inline void inc_nlink(struct inode *inode)
1360 { 1672 {
1361 inode->i_nlink++; 1673 inode->i_nlink++;
1362 } 1674 }
1363 1675
1364 static inline void inode_inc_link_count(struc 1676 static inline void inode_inc_link_count(struct inode *inode)
1365 { 1677 {
1366 inc_nlink(inode); 1678 inc_nlink(inode);
1367 mark_inode_dirty(inode); 1679 mark_inode_dirty(inode);
1368 } 1680 }
1369 1681
1370 /** 1682 /**
1371 * drop_nlink - directly drop an inode's link 1683 * drop_nlink - directly drop an inode's link count
1372 * @inode: inode 1684 * @inode: inode
1373 * 1685 *
1374 * This is a low-level filesystem helper to r 1686 * This is a low-level filesystem helper to replace any
1375 * direct filesystem manipulation of i_nlink. 1687 * direct filesystem manipulation of i_nlink. In cases
1376 * where we are attempting to track writes to 1688 * where we are attempting to track writes to the
1377 * filesystem, a decrement to zero means an i 1689 * filesystem, a decrement to zero means an imminent
1378 * write when the file is truncated and actua 1690 * write when the file is truncated and actually unlinked
1379 * on the filesystem. 1691 * on the filesystem.
1380 */ 1692 */
1381 static inline void drop_nlink(struct inode *i 1693 static inline void drop_nlink(struct inode *inode)
1382 { 1694 {
1383 inode->i_nlink--; 1695 inode->i_nlink--;
1384 } 1696 }
1385 1697
1386 /** 1698 /**
1387 * clear_nlink - directly zero an inode's lin 1699 * clear_nlink - directly zero an inode's link count
1388 * @inode: inode 1700 * @inode: inode
1389 * 1701 *
1390 * This is a low-level filesystem helper to r 1702 * This is a low-level filesystem helper to replace any
1391 * direct filesystem manipulation of i_nlink. 1703 * direct filesystem manipulation of i_nlink. See
1392 * drop_nlink() for why we care about i_nlink 1704 * drop_nlink() for why we care about i_nlink hitting zero.
1393 */ 1705 */
1394 static inline void clear_nlink(struct inode * 1706 static inline void clear_nlink(struct inode *inode)
1395 { 1707 {
1396 inode->i_nlink = 0; 1708 inode->i_nlink = 0;
1397 } 1709 }
1398 1710
1399 static inline void inode_dec_link_count(struc 1711 static inline void inode_dec_link_count(struct inode *inode)
1400 { 1712 {
1401 drop_nlink(inode); 1713 drop_nlink(inode);
1402 mark_inode_dirty(inode); 1714 mark_inode_dirty(inode);
1403 } 1715 }
1404 1716
1405 /** 1717 /**
1406 * inode_inc_iversion - increments i_version 1718 * inode_inc_iversion - increments i_version
1407 * @inode: inode that need to be updated 1719 * @inode: inode that need to be updated
1408 * 1720 *
1409 * Every time the inode is modified, the i_ve 1721 * Every time the inode is modified, the i_version field will be incremented.
1410 * The filesystem has to be mounted with i_ve 1722 * The filesystem has to be mounted with i_version flag
1411 */ 1723 */
1412 1724
1413 static inline void inode_inc_iversion(struct 1725 static inline void inode_inc_iversion(struct inode *inode)
1414 { 1726 {
1415 spin_lock(&inode->i_lock); 1727 spin_lock(&inode->i_lock);
1416 inode->i_version++; 1728 inode->i_version++;
1417 spin_unlock(&inode->i_lock); 1729 spin_unlock(&inode->i_lock);
1418 } 1730 }
1419 1731
1420 extern void touch_atime(struct vfsmount *mnt, 1732 extern void touch_atime(struct vfsmount *mnt, struct dentry *dentry);
1421 static inline void file_accessed(struct file 1733 static inline void file_accessed(struct file *file)
1422 { 1734 {
1423 if (!(file->f_flags & O_NOATIME)) 1735 if (!(file->f_flags & O_NOATIME))
1424 touch_atime(file->f_path.mnt, 1736 touch_atime(file->f_path.mnt, file->f_path.dentry);
1425 } 1737 }
1426 1738
1427 int sync_inode(struct inode *inode, struct wr 1739 int sync_inode(struct inode *inode, struct writeback_control *wbc);
1428 1740
1429 struct file_system_type { 1741 struct file_system_type {
1430 const char *name; 1742 const char *name;
1431 int fs_flags; 1743 int fs_flags;
1432 int (*get_sb) (struct file_system_typ 1744 int (*get_sb) (struct file_system_type *, int,
1433 const char *, void *, 1745 const char *, void *, struct vfsmount *);
1434 void (*kill_sb) (struct super_block * 1746 void (*kill_sb) (struct super_block *);
1435 struct module *owner; 1747 struct module *owner;
1436 struct file_system_type * next; 1748 struct file_system_type * next;
1437 struct list_head fs_supers; 1749 struct list_head fs_supers;
1438 1750
1439 struct lock_class_key s_lock_key; 1751 struct lock_class_key s_lock_key;
1440 struct lock_class_key s_umount_key; 1752 struct lock_class_key s_umount_key;
1441 1753
1442 struct lock_class_key i_lock_key; 1754 struct lock_class_key i_lock_key;
1443 struct lock_class_key i_mutex_key; 1755 struct lock_class_key i_mutex_key;
1444 struct lock_class_key i_mutex_dir_key 1756 struct lock_class_key i_mutex_dir_key;
1445 struct lock_class_key i_alloc_sem_key 1757 struct lock_class_key i_alloc_sem_key;
1446 }; 1758 };
1447 1759
>> 1760 extern int get_sb_ns(struct file_system_type *fs_type, int flags, void *data,
>> 1761 int (*fill_super)(struct super_block *, void *, int),
>> 1762 struct vfsmount *mnt);
1448 extern int get_sb_bdev(struct file_system_typ 1763 extern int get_sb_bdev(struct file_system_type *fs_type,
1449 int flags, const char *dev_name, void 1764 int flags, const char *dev_name, void *data,
1450 int (*fill_super)(struct super_block 1765 int (*fill_super)(struct super_block *, void *, int),
1451 struct vfsmount *mnt); 1766 struct vfsmount *mnt);
1452 extern int get_sb_single(struct file_system_t 1767 extern int get_sb_single(struct file_system_type *fs_type,
1453 int flags, void *data, 1768 int flags, void *data,
1454 int (*fill_super)(struct super_block 1769 int (*fill_super)(struct super_block *, void *, int),
1455 struct vfsmount *mnt); 1770 struct vfsmount *mnt);
1456 extern int get_sb_nodev(struct file_system_ty 1771 extern int get_sb_nodev(struct file_system_type *fs_type,
1457 int flags, void *data, 1772 int flags, void *data,
1458 int (*fill_super)(struct super_block 1773 int (*fill_super)(struct super_block *, void *, int),
1459 struct vfsmount *mnt); 1774 struct vfsmount *mnt);
1460 void generic_shutdown_super(struct super_bloc 1775 void generic_shutdown_super(struct super_block *sb);
1461 void kill_block_super(struct super_block *sb) 1776 void kill_block_super(struct super_block *sb);
1462 void kill_anon_super(struct super_block *sb); 1777 void kill_anon_super(struct super_block *sb);
1463 void kill_litter_super(struct super_block *sb 1778 void kill_litter_super(struct super_block *sb);
1464 void deactivate_super(struct super_block *sb) 1779 void deactivate_super(struct super_block *sb);
>> 1780 void deactivate_locked_super(struct super_block *sb);
1465 int set_anon_super(struct super_block *s, voi 1781 int set_anon_super(struct super_block *s, void *data);
1466 struct super_block *sget(struct file_system_t 1782 struct super_block *sget(struct file_system_type *type,
1467 int (*test)(struct su 1783 int (*test)(struct super_block *,void *),
1468 int (*set)(struct sup 1784 int (*set)(struct super_block *,void *),
1469 void *data); 1785 void *data);
1470 extern int get_sb_pseudo(struct file_system_t 1786 extern int get_sb_pseudo(struct file_system_type *, char *,
1471 const struct super_operations *ops, u 1787 const struct super_operations *ops, unsigned long,
1472 struct vfsmount *mnt); 1788 struct vfsmount *mnt);
1473 extern int simple_set_mnt(struct vfsmount *mn !! 1789 extern void simple_set_mnt(struct vfsmount *mnt, struct super_block *sb);
1474 int __put_super(struct super_block *sb); <<
1475 int __put_super_and_need_restart(struct super 1790 int __put_super_and_need_restart(struct super_block *sb);
1476 void unnamed_dev_init(void); <<
1477 1791
1478 /* Alas, no aliases. Too much hassle with bri 1792 /* Alas, no aliases. Too much hassle with bringing module.h everywhere */
1479 #define fops_get(fops) \ 1793 #define fops_get(fops) \
1480 (((fops) && try_module_get((fops)->ow 1794 (((fops) && try_module_get((fops)->owner) ? (fops) : NULL))
1481 #define fops_put(fops) \ 1795 #define fops_put(fops) \
1482 do { if (fops) module_put((fops)->own 1796 do { if (fops) module_put((fops)->owner); } while(0)
1483 1797
1484 extern int register_filesystem(struct file_sy 1798 extern int register_filesystem(struct file_system_type *);
1485 extern int unregister_filesystem(struct file_ 1799 extern int unregister_filesystem(struct file_system_type *);
1486 extern struct vfsmount *kern_mount_data(struc 1800 extern struct vfsmount *kern_mount_data(struct file_system_type *, void *data);
1487 #define kern_mount(type) kern_mount_data(type 1801 #define kern_mount(type) kern_mount_data(type, NULL)
1488 extern int may_umount_tree(struct vfsmount *) 1802 extern int may_umount_tree(struct vfsmount *);
1489 extern int may_umount(struct vfsmount *); 1803 extern int may_umount(struct vfsmount *);
1490 extern void umount_tree(struct vfsmount *, in <<
1491 extern void release_mounts(struct list_head * <<
1492 extern long do_mount(char *, char *, char *, 1804 extern long do_mount(char *, char *, char *, unsigned long, void *);
1493 extern struct vfsmount *copy_tree(struct vfsm !! 1805 extern struct vfsmount *collect_mounts(struct path *);
1494 extern void mnt_set_mountpoint(struct vfsmoun <<
1495 struct vfsm <<
1496 extern struct vfsmount *collect_mounts(struct <<
1497 extern void drop_collected_mounts(struct vfsm 1806 extern void drop_collected_mounts(struct vfsmount *);
1498 1807
1499 extern int vfs_statfs(struct dentry *, struct 1808 extern int vfs_statfs(struct dentry *, struct kstatfs *);
1500 1809
>> 1810 extern int current_umask(void);
>> 1811
1501 /* /sys/fs */ 1812 /* /sys/fs */
1502 extern struct kobject *fs_kobj; 1813 extern struct kobject *fs_kobj;
1503 1814
>> 1815 extern int rw_verify_area(int, struct file *, loff_t *, size_t);
>> 1816
1504 #define FLOCK_VERIFY_READ 1 1817 #define FLOCK_VERIFY_READ 1
1505 #define FLOCK_VERIFY_WRITE 2 1818 #define FLOCK_VERIFY_WRITE 2
1506 1819
>> 1820 #ifdef CONFIG_FILE_LOCKING
1507 extern int locks_mandatory_locked(struct inod 1821 extern int locks_mandatory_locked(struct inode *);
1508 extern int locks_mandatory_area(int, struct i 1822 extern int locks_mandatory_area(int, struct inode *, struct file *, loff_t, size_t);
1509 1823
1510 /* 1824 /*
1511 * Candidates for mandatory locking have the 1825 * Candidates for mandatory locking have the setgid bit set
1512 * but no group execute bit - an otherwise m 1826 * but no group execute bit - an otherwise meaningless combination.
1513 */ 1827 */
1514 1828
1515 static inline int __mandatory_lock(struct ino 1829 static inline int __mandatory_lock(struct inode *ino)
1516 { 1830 {
1517 return (ino->i_mode & (S_ISGID | S_IX 1831 return (ino->i_mode & (S_ISGID | S_IXGRP)) == S_ISGID;
1518 } 1832 }
1519 1833
1520 /* 1834 /*
1521 * ... and these candidates should be on MS_M 1835 * ... and these candidates should be on MS_MANDLOCK mounted fs,
1522 * otherwise these will be advisory locks 1836 * otherwise these will be advisory locks
1523 */ 1837 */
1524 1838
1525 static inline int mandatory_lock(struct inode 1839 static inline int mandatory_lock(struct inode *ino)
1526 { 1840 {
1527 return IS_MANDLOCK(ino) && __mandator 1841 return IS_MANDLOCK(ino) && __mandatory_lock(ino);
1528 } 1842 }
1529 1843
1530 static inline int locks_verify_locked(struct 1844 static inline int locks_verify_locked(struct inode *inode)
1531 { 1845 {
1532 if (mandatory_lock(inode)) 1846 if (mandatory_lock(inode))
1533 return locks_mandatory_locked 1847 return locks_mandatory_locked(inode);
1534 return 0; 1848 return 0;
1535 } 1849 }
1536 1850
1537 extern int rw_verify_area(int, struct file *, <<
1538 <<
1539 static inline int locks_verify_truncate(struc 1851 static inline int locks_verify_truncate(struct inode *inode,
1540 struct fi 1852 struct file *filp,
1541 loff_t si 1853 loff_t size)
1542 { 1854 {
1543 if (inode->i_flock && mandatory_lock( 1855 if (inode->i_flock && mandatory_lock(inode))
1544 return locks_mandatory_area( 1856 return locks_mandatory_area(
1545 FLOCK_VERIFY_WRITE, i 1857 FLOCK_VERIFY_WRITE, inode, filp,
1546 size < inode->i_size 1858 size < inode->i_size ? size : inode->i_size,
1547 (size < inode->i_size 1859 (size < inode->i_size ? inode->i_size - size
1548 : size - inode->i_si 1860 : size - inode->i_size)
1549 ); 1861 );
1550 return 0; 1862 return 0;
1551 } 1863 }
1552 1864
1553 static inline int break_lease(struct inode *i 1865 static inline int break_lease(struct inode *inode, unsigned int mode)
1554 { 1866 {
1555 if (inode->i_flock) 1867 if (inode->i_flock)
1556 return __break_lease(inode, m 1868 return __break_lease(inode, mode);
1557 return 0; 1869 return 0;
1558 } 1870 }
>> 1871 #else /* !CONFIG_FILE_LOCKING */
>> 1872 static inline int locks_mandatory_locked(struct inode *inode)
>> 1873 {
>> 1874 return 0;
>> 1875 }
>> 1876
>> 1877 static inline int locks_mandatory_area(int rw, struct inode *inode,
>> 1878 struct file *filp, loff_t offset,
>> 1879 size_t count)
>> 1880 {
>> 1881 return 0;
>> 1882 }
>> 1883
>> 1884 static inline int __mandatory_lock(struct inode *inode)
>> 1885 {
>> 1886 return 0;
>> 1887 }
>> 1888
>> 1889 static inline int mandatory_lock(struct inode *inode)
>> 1890 {
>> 1891 return 0;
>> 1892 }
>> 1893
>> 1894 static inline int locks_verify_locked(struct inode *inode)
>> 1895 {
>> 1896 return 0;
>> 1897 }
>> 1898
>> 1899 static inline int locks_verify_truncate(struct inode *inode, struct file *filp,
>> 1900 size_t size)
>> 1901 {
>> 1902 return 0;
>> 1903 }
>> 1904
>> 1905 static inline int break_lease(struct inode *inode, unsigned int mode)
>> 1906 {
>> 1907 return 0;
>> 1908 }
>> 1909
>> 1910 #endif /* CONFIG_FILE_LOCKING */
1559 1911
1560 /* fs/open.c */ 1912 /* fs/open.c */
1561 1913
1562 extern int do_truncate(struct dentry *, loff_ 1914 extern int do_truncate(struct dentry *, loff_t start, unsigned int time_attrs,
1563 struct file *filp); 1915 struct file *filp);
>> 1916 extern int do_fallocate(struct file *file, int mode, loff_t offset,
>> 1917 loff_t len);
1564 extern long do_sys_open(int dfd, const char _ 1918 extern long do_sys_open(int dfd, const char __user *filename, int flags,
1565 int mode); 1919 int mode);
1566 extern struct file *filp_open(const char *, i 1920 extern struct file *filp_open(const char *, int, int);
1567 extern struct file * dentry_open(struct dentr !! 1921 extern struct file * dentry_open(struct dentry *, struct vfsmount *, int,
>> 1922 const struct cred *);
1568 extern int filp_close(struct file *, fl_owner 1923 extern int filp_close(struct file *, fl_owner_t id);
1569 extern char * getname(const char __user *); 1924 extern char * getname(const char __user *);
1570 1925
>> 1926 /* fs/ioctl.c */
>> 1927
>> 1928 extern int ioctl_preallocate(struct file *filp, void __user *argp);
>> 1929
1571 /* fs/dcache.c */ 1930 /* fs/dcache.c */
1572 extern void __init vfs_caches_init_early(void 1931 extern void __init vfs_caches_init_early(void);
1573 extern void __init vfs_caches_init(unsigned l 1932 extern void __init vfs_caches_init(unsigned long);
1574 1933
1575 extern struct kmem_cache *names_cachep; 1934 extern struct kmem_cache *names_cachep;
1576 1935
1577 #define __getname() kmem_cache_alloc(name !! 1936 #define __getname_gfp(gfp) kmem_cache_alloc(names_cachep, (gfp))
1578 #define __putname(name) kmem_cache_free(names !! 1937 #define __getname() __getname_gfp(GFP_KERNEL)
>> 1938 #define __putname(name) kmem_cache_free(names_cachep, (void *)(name))
1579 #ifndef CONFIG_AUDITSYSCALL 1939 #ifndef CONFIG_AUDITSYSCALL
1580 #define putname(name) __putname(name) 1940 #define putname(name) __putname(name)
1581 #else 1941 #else
1582 extern void putname(const char *name); 1942 extern void putname(const char *name);
1583 #endif 1943 #endif
1584 1944
1585 #ifdef CONFIG_BLOCK 1945 #ifdef CONFIG_BLOCK
1586 extern int register_blkdev(unsigned int, cons 1946 extern int register_blkdev(unsigned int, const char *);
1587 extern void unregister_blkdev(unsigned int, c 1947 extern void unregister_blkdev(unsigned int, const char *);
1588 extern struct block_device *bdget(dev_t); 1948 extern struct block_device *bdget(dev_t);
>> 1949 extern struct block_device *bdgrab(struct block_device *bdev);
1589 extern void bd_set_size(struct block_device * 1950 extern void bd_set_size(struct block_device *, loff_t size);
1590 extern void bd_forget(struct inode *inode); 1951 extern void bd_forget(struct inode *inode);
1591 extern void bdput(struct block_device *); 1952 extern void bdput(struct block_device *);
1592 extern struct block_device *open_by_devnum(de !! 1953 extern struct block_device *open_by_devnum(dev_t, fmode_t);
>> 1954 extern void invalidate_bdev(struct block_device *);
>> 1955 extern int sync_blockdev(struct block_device *bdev);
>> 1956 extern struct super_block *freeze_bdev(struct block_device *);
>> 1957 extern void emergency_thaw_all(void);
>> 1958 extern int thaw_bdev(struct block_device *bdev, struct super_block *sb);
>> 1959 extern int fsync_bdev(struct block_device *);
1593 #else 1960 #else
1594 static inline void bd_forget(struct inode *in 1961 static inline void bd_forget(struct inode *inode) {}
>> 1962 static inline int sync_blockdev(struct block_device *bdev) { return 0; }
>> 1963 static inline void invalidate_bdev(struct block_device *bdev) {}
>> 1964
>> 1965 static inline struct super_block *freeze_bdev(struct block_device *sb)
>> 1966 {
>> 1967 return NULL;
>> 1968 }
>> 1969
>> 1970 static inline int thaw_bdev(struct block_device *bdev, struct super_block *sb)
>> 1971 {
>> 1972 return 0;
>> 1973 }
1595 #endif 1974 #endif
>> 1975 extern int sync_filesystem(struct super_block *);
1596 extern const struct file_operations def_blk_f 1976 extern const struct file_operations def_blk_fops;
1597 extern const struct file_operations def_chr_f 1977 extern const struct file_operations def_chr_fops;
1598 extern const struct file_operations bad_sock_ 1978 extern const struct file_operations bad_sock_fops;
1599 extern const struct file_operations def_fifo_ 1979 extern const struct file_operations def_fifo_fops;
1600 #ifdef CONFIG_BLOCK 1980 #ifdef CONFIG_BLOCK
1601 extern int ioctl_by_bdev(struct block_device 1981 extern int ioctl_by_bdev(struct block_device *, unsigned, unsigned long);
1602 extern int blkdev_ioctl(struct inode *, struc !! 1982 extern int blkdev_ioctl(struct block_device *, fmode_t, unsigned, unsigned long);
1603 extern int blkdev_driver_ioctl(struct inode * <<
1604 struct gendisk <<
1605 unsigned long <<
1606 extern long compat_blkdev_ioctl(struct file * 1983 extern long compat_blkdev_ioctl(struct file *, unsigned, unsigned long);
1607 extern int blkdev_get(struct block_device *, !! 1984 extern int blkdev_get(struct block_device *, fmode_t);
1608 extern int blkdev_put(struct block_device *); !! 1985 extern int blkdev_put(struct block_device *, fmode_t);
1609 extern int bd_claim(struct block_device *, vo 1986 extern int bd_claim(struct block_device *, void *);
1610 extern void bd_release(struct block_device *) 1987 extern void bd_release(struct block_device *);
1611 #ifdef CONFIG_SYSFS 1988 #ifdef CONFIG_SYSFS
1612 extern int bd_claim_by_disk(struct block_devi 1989 extern int bd_claim_by_disk(struct block_device *, void *, struct gendisk *);
1613 extern void bd_release_from_disk(struct block 1990 extern void bd_release_from_disk(struct block_device *, struct gendisk *);
1614 #else 1991 #else
1615 #define bd_claim_by_disk(bdev, holder, disk) 1992 #define bd_claim_by_disk(bdev, holder, disk) bd_claim(bdev, holder)
1616 #define bd_release_from_disk(bdev, disk) 1993 #define bd_release_from_disk(bdev, disk) bd_release(bdev)
1617 #endif 1994 #endif
1618 #endif 1995 #endif
1619 1996
1620 /* fs/char_dev.c */ 1997 /* fs/char_dev.c */
1621 #define CHRDEV_MAJOR_HASH_SIZE 255 1998 #define CHRDEV_MAJOR_HASH_SIZE 255
1622 extern int alloc_chrdev_region(dev_t *, unsig 1999 extern int alloc_chrdev_region(dev_t *, unsigned, unsigned, const char *);
1623 extern int register_chrdev_region(dev_t, unsi 2000 extern int register_chrdev_region(dev_t, unsigned, const char *);
1624 extern int register_chrdev(unsigned int, cons 2001 extern int register_chrdev(unsigned int, const char *,
1625 const struct file_ 2002 const struct file_operations *);
1626 extern void unregister_chrdev(unsigned int, c 2003 extern void unregister_chrdev(unsigned int, const char *);
1627 extern void unregister_chrdev_region(dev_t, u 2004 extern void unregister_chrdev_region(dev_t, unsigned);
1628 extern void chrdev_show(struct seq_file *,off 2005 extern void chrdev_show(struct seq_file *,off_t);
1629 2006
1630 /* fs/block_dev.c */ 2007 /* fs/block_dev.c */
1631 #define BDEVNAME_SIZE 32 /* Largest st 2008 #define BDEVNAME_SIZE 32 /* Largest string for a blockdev identifier */
>> 2009 #define BDEVT_SIZE 10 /* Largest string for MAJ:MIN for blkdev */
1632 2010
1633 #ifdef CONFIG_BLOCK 2011 #ifdef CONFIG_BLOCK
1634 #define BLKDEV_MAJOR_HASH_SIZE 255 2012 #define BLKDEV_MAJOR_HASH_SIZE 255
1635 extern const char *__bdevname(dev_t, char *bu 2013 extern const char *__bdevname(dev_t, char *buffer);
1636 extern const char *bdevname(struct block_devi 2014 extern const char *bdevname(struct block_device *bdev, char *buffer);
1637 extern struct block_device *lookup_bdev(const 2015 extern struct block_device *lookup_bdev(const char *);
1638 extern struct block_device *open_bdev_excl(co !! 2016 extern struct block_device *open_bdev_exclusive(const char *, fmode_t, void *);
1639 extern void close_bdev_excl(struct block_devi !! 2017 extern void close_bdev_exclusive(struct block_device *, fmode_t);
1640 extern void blkdev_show(struct seq_file *,off 2018 extern void blkdev_show(struct seq_file *,off_t);
>> 2019
1641 #else 2020 #else
1642 #define BLKDEV_MAJOR_HASH_SIZE 0 2021 #define BLKDEV_MAJOR_HASH_SIZE 0
1643 #endif 2022 #endif
1644 2023
1645 extern void init_special_inode(struct inode * 2024 extern void init_special_inode(struct inode *, umode_t, dev_t);
1646 2025
1647 /* Invalid inode operations -- fs/bad_inode.c 2026 /* Invalid inode operations -- fs/bad_inode.c */
1648 extern void make_bad_inode(struct inode *); 2027 extern void make_bad_inode(struct inode *);
1649 extern int is_bad_inode(struct inode *); 2028 extern int is_bad_inode(struct inode *);
1650 2029
1651 extern const struct file_operations read_fifo !! 2030 extern const struct file_operations read_pipefifo_fops;
1652 extern const struct file_operations write_fif !! 2031 extern const struct file_operations write_pipefifo_fops;
1653 extern const struct file_operations rdwr_fifo !! 2032 extern const struct file_operations rdwr_pipefifo_fops;
1654 2033
1655 extern int fs_may_remount_ro(struct super_blo 2034 extern int fs_may_remount_ro(struct super_block *);
1656 2035
1657 #ifdef CONFIG_BLOCK 2036 #ifdef CONFIG_BLOCK
1658 /* 2037 /*
1659 * return READ, READA, or WRITE 2038 * return READ, READA, or WRITE
1660 */ 2039 */
1661 #define bio_rw(bio) ((bio)->bi_rw 2040 #define bio_rw(bio) ((bio)->bi_rw & (RW_MASK | RWA_MASK))
1662 2041
1663 /* 2042 /*
1664 * return data direction, READ or WRITE 2043 * return data direction, READ or WRITE
1665 */ 2044 */
1666 #define bio_data_dir(bio) ((bio)->bi_rw 2045 #define bio_data_dir(bio) ((bio)->bi_rw & 1)
1667 2046
>> 2047 extern void check_disk_size_change(struct gendisk *disk,
>> 2048 struct block_device *bdev);
>> 2049 extern int revalidate_disk(struct gendisk *);
1668 extern int check_disk_change(struct block_dev 2050 extern int check_disk_change(struct block_device *);
1669 extern int __invalidate_device(struct block_d 2051 extern int __invalidate_device(struct block_device *);
1670 extern int invalidate_partition(struct gendis 2052 extern int invalidate_partition(struct gendisk *, int);
1671 #endif 2053 #endif
1672 extern int invalidate_inodes(struct super_blo 2054 extern int invalidate_inodes(struct super_block *);
1673 unsigned long __invalidate_mapping_pages(stru <<
1674 pgoff <<
1675 bool <<
1676 unsigned long invalidate_mapping_pages(struct 2055 unsigned long invalidate_mapping_pages(struct address_space *mapping,
1677 pgoff 2056 pgoff_t start, pgoff_t end);
1678 2057
1679 static inline unsigned long __deprecated 2058 static inline unsigned long __deprecated
1680 invalidate_inode_pages(struct address_space * 2059 invalidate_inode_pages(struct address_space *mapping)
1681 { 2060 {
1682 return invalidate_mapping_pages(mappi 2061 return invalidate_mapping_pages(mapping, 0, ~0UL);
1683 } 2062 }
1684 2063
1685 static inline void invalidate_remote_inode(st 2064 static inline void invalidate_remote_inode(struct inode *inode)
1686 { 2065 {
1687 if (S_ISREG(inode->i_mode) || S_ISDIR 2066 if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
1688 S_ISLNK(inode->i_mode)) 2067 S_ISLNK(inode->i_mode))
1689 invalidate_mapping_pages(inod 2068 invalidate_mapping_pages(inode->i_mapping, 0, -1);
1690 } 2069 }
1691 extern int invalidate_inode_pages2(struct add 2070 extern int invalidate_inode_pages2(struct address_space *mapping);
1692 extern int invalidate_inode_pages2_range(stru 2071 extern int invalidate_inode_pages2_range(struct address_space *mapping,
1693 pgof 2072 pgoff_t start, pgoff_t end);
>> 2073 extern void generic_sync_sb_inodes(struct super_block *sb,
>> 2074 struct writeback_control *wbc);
1694 extern int write_inode_now(struct inode *, in 2075 extern int write_inode_now(struct inode *, int);
1695 extern int filemap_fdatawrite(struct address_ 2076 extern int filemap_fdatawrite(struct address_space *);
1696 extern int filemap_flush(struct address_space 2077 extern int filemap_flush(struct address_space *);
1697 extern int filemap_fdatawait(struct address_s 2078 extern int filemap_fdatawait(struct address_space *);
1698 extern int filemap_write_and_wait(struct addr 2079 extern int filemap_write_and_wait(struct address_space *mapping);
1699 extern int filemap_write_and_wait_range(struc 2080 extern int filemap_write_and_wait_range(struct address_space *mapping,
1700 loff_ 2081 loff_t lstart, loff_t lend);
1701 extern int wait_on_page_writeback_range(struc 2082 extern int wait_on_page_writeback_range(struct address_space *mapping,
1702 pgoff_t start 2083 pgoff_t start, pgoff_t end);
1703 extern int __filemap_fdatawrite_range(struct 2084 extern int __filemap_fdatawrite_range(struct address_space *mapping,
1704 loff_t start, 2085 loff_t start, loff_t end, int sync_mode);
>> 2086 extern int filemap_fdatawrite_range(struct address_space *mapping,
>> 2087 loff_t start, loff_t end);
1705 2088
1706 extern long do_fsync(struct file *file, int d !! 2089 extern int vfs_fsync(struct file *file, struct dentry *dentry, int datasync);
1707 extern void sync_supers(void); 2090 extern void sync_supers(void);
1708 extern void sync_filesystems(int wait); <<
1709 extern void __fsync_super(struct super_block <<
1710 extern void emergency_sync(void); 2091 extern void emergency_sync(void);
1711 extern void emergency_remount(void); 2092 extern void emergency_remount(void);
1712 extern int do_remount_sb(struct super_block * <<
1713 void *data, int forc <<
1714 #ifdef CONFIG_BLOCK 2093 #ifdef CONFIG_BLOCK
1715 extern sector_t bmap(struct inode *, sector_t 2094 extern sector_t bmap(struct inode *, sector_t);
1716 #endif 2095 #endif
1717 extern int notify_change(struct dentry *, str 2096 extern int notify_change(struct dentry *, struct iattr *);
1718 extern int permission(struct inode *, int, st !! 2097 extern int inode_permission(struct inode *, int);
1719 extern int generic_permission(struct inode *, 2098 extern int generic_permission(struct inode *, int,
1720 int (*check_acl)(struct inode 2099 int (*check_acl)(struct inode *, int));
1721 2100
>> 2101 static inline bool execute_ok(struct inode *inode)
>> 2102 {
>> 2103 return (inode->i_mode & S_IXUGO) || S_ISDIR(inode->i_mode);
>> 2104 }
>> 2105
1722 extern int get_write_access(struct inode *); 2106 extern int get_write_access(struct inode *);
1723 extern int deny_write_access(struct file *); 2107 extern int deny_write_access(struct file *);
1724 static inline void put_write_access(struct in 2108 static inline void put_write_access(struct inode * inode)
1725 { 2109 {
1726 atomic_dec(&inode->i_writecount); 2110 atomic_dec(&inode->i_writecount);
1727 } 2111 }
1728 static inline void allow_write_access(struct 2112 static inline void allow_write_access(struct file *file)
1729 { 2113 {
1730 if (file) 2114 if (file)
1731 atomic_inc(&file->f_path.dent 2115 atomic_inc(&file->f_path.dentry->d_inode->i_writecount);
1732 } 2116 }
1733 extern int do_pipe(int *); !! 2117 extern int do_pipe_flags(int *, int);
1734 extern struct file *create_read_pipe(struct f !! 2118 extern struct file *create_read_pipe(struct file *f, int flags);
1735 extern struct file *create_write_pipe(void); !! 2119 extern struct file *create_write_pipe(int flags);
1736 extern void free_write_pipe(struct file *); 2120 extern void free_write_pipe(struct file *);
1737 2121
1738 extern int open_namei(int dfd, const char *, !! 2122 extern struct file *do_filp_open(int dfd, const char *pathname,
1739 extern int may_open(struct nameidata *, int, !! 2123 int open_flag, int mode, int acc_mode);
>> 2124 extern int may_open(struct path *, int, int);
1740 2125
1741 extern int kernel_read(struct file *, unsigne !! 2126 extern int kernel_read(struct file *, loff_t, char *, unsigned long);
1742 extern struct file * open_exec(const char *); 2127 extern struct file * open_exec(const char *);
1743 2128
1744 /* fs/dcache.c -- generic fs support function 2129 /* fs/dcache.c -- generic fs support functions */
1745 extern int is_subdir(struct dentry *, struct 2130 extern int is_subdir(struct dentry *, struct dentry *);
1746 extern ino_t find_inode_number(struct dentry 2131 extern ino_t find_inode_number(struct dentry *, struct qstr *);
1747 2132
1748 #include <linux/err.h> 2133 #include <linux/err.h>
1749 2134
1750 /* needed for stackable file system support * 2135 /* needed for stackable file system support */
1751 extern loff_t default_llseek(struct file *fil 2136 extern loff_t default_llseek(struct file *file, loff_t offset, int origin);
1752 2137
1753 extern loff_t vfs_llseek(struct file *file, l 2138 extern loff_t vfs_llseek(struct file *file, loff_t offset, int origin);
1754 2139
>> 2140 extern int inode_init_always(struct super_block *, struct inode *);
1755 extern void inode_init_once(struct inode *); 2141 extern void inode_init_once(struct inode *);
>> 2142 extern void inode_add_to_lists(struct super_block *, struct inode *);
1756 extern void iput(struct inode *); 2143 extern void iput(struct inode *);
1757 extern struct inode * igrab(struct inode *); 2144 extern struct inode * igrab(struct inode *);
1758 extern ino_t iunique(struct super_block *, in 2145 extern ino_t iunique(struct super_block *, ino_t);
1759 extern int inode_needs_sync(struct inode *ino 2146 extern int inode_needs_sync(struct inode *inode);
1760 extern void generic_delete_inode(struct inode 2147 extern void generic_delete_inode(struct inode *inode);
1761 extern void generic_drop_inode(struct inode * 2148 extern void generic_drop_inode(struct inode *inode);
1762 2149
1763 extern struct inode *ilookup5_nowait(struct s 2150 extern struct inode *ilookup5_nowait(struct super_block *sb,
1764 unsigned long hashval, int (* 2151 unsigned long hashval, int (*test)(struct inode *, void *),
1765 void *data); 2152 void *data);
1766 extern struct inode *ilookup5(struct super_bl 2153 extern struct inode *ilookup5(struct super_block *sb, unsigned long hashval,
1767 int (*test)(struct inode *, v 2154 int (*test)(struct inode *, void *), void *data);
1768 extern struct inode *ilookup(struct super_blo 2155 extern struct inode *ilookup(struct super_block *sb, unsigned long ino);
1769 2156
1770 extern struct inode * iget5_locked(struct sup 2157 extern struct inode * iget5_locked(struct super_block *, unsigned long, int (*test)(struct inode *, void *), int (*set)(struct inode *, void *), void *);
1771 extern struct inode * iget_locked(struct supe 2158 extern struct inode * iget_locked(struct super_block *, unsigned long);
>> 2159 extern int insert_inode_locked4(struct inode *, unsigned long, int (*test)(struct inode *, void *), void *);
>> 2160 extern int insert_inode_locked(struct inode *);
1772 extern void unlock_new_inode(struct inode *); 2161 extern void unlock_new_inode(struct inode *);
1773 2162
1774 extern void __iget(struct inode * inode); 2163 extern void __iget(struct inode * inode);
1775 extern void iget_failed(struct inode *); 2164 extern void iget_failed(struct inode *);
1776 extern void clear_inode(struct inode *); 2165 extern void clear_inode(struct inode *);
1777 extern void destroy_inode(struct inode *); 2166 extern void destroy_inode(struct inode *);
>> 2167 extern void __destroy_inode(struct inode *);
1778 extern struct inode *new_inode(struct super_b 2168 extern struct inode *new_inode(struct super_block *);
1779 extern int __remove_suid(struct dentry *, int <<
1780 extern int should_remove_suid(struct dentry * 2169 extern int should_remove_suid(struct dentry *);
1781 extern int remove_suid(struct dentry *); !! 2170 extern int file_remove_suid(struct file *);
1782 2171
1783 extern void __insert_inode_hash(struct inode 2172 extern void __insert_inode_hash(struct inode *, unsigned long hashval);
1784 extern void remove_inode_hash(struct inode *) 2173 extern void remove_inode_hash(struct inode *);
1785 static inline void insert_inode_hash(struct i 2174 static inline void insert_inode_hash(struct inode *inode) {
1786 __insert_inode_hash(inode, inode->i_i 2175 __insert_inode_hash(inode, inode->i_ino);
1787 } 2176 }
1788 2177
1789 extern struct file * get_empty_filp(void); 2178 extern struct file * get_empty_filp(void);
1790 extern void file_move(struct file *f, struct 2179 extern void file_move(struct file *f, struct list_head *list);
1791 extern void file_kill(struct file *f); 2180 extern void file_kill(struct file *f);
1792 #ifdef CONFIG_BLOCK 2181 #ifdef CONFIG_BLOCK
1793 struct bio; 2182 struct bio;
1794 extern void submit_bio(int, struct bio *); 2183 extern void submit_bio(int, struct bio *);
1795 extern int bdev_read_only(struct block_device 2184 extern int bdev_read_only(struct block_device *);
1796 #endif 2185 #endif
1797 extern int set_blocksize(struct block_device 2186 extern int set_blocksize(struct block_device *, int);
1798 extern int sb_set_blocksize(struct super_bloc 2187 extern int sb_set_blocksize(struct super_block *, int);
1799 extern int sb_min_blocksize(struct super_bloc 2188 extern int sb_min_blocksize(struct super_block *, int);
1800 extern int sb_has_dirty_inodes(struct super_b 2189 extern int sb_has_dirty_inodes(struct super_block *);
1801 2190
1802 extern int generic_file_mmap(struct file *, s 2191 extern int generic_file_mmap(struct file *, struct vm_area_struct *);
1803 extern int generic_file_readonly_mmap(struct 2192 extern int generic_file_readonly_mmap(struct file *, struct vm_area_struct *);
1804 extern int file_read_actor(read_descriptor_t 2193 extern int file_read_actor(read_descriptor_t * desc, struct page *page, unsigned long offset, unsigned long size);
1805 int generic_write_checks(struct file *file, l 2194 int generic_write_checks(struct file *file, loff_t *pos, size_t *count, int isblk);
1806 extern ssize_t generic_file_aio_read(struct k 2195 extern ssize_t generic_file_aio_read(struct kiocb *, const struct iovec *, unsigned long, loff_t);
1807 extern ssize_t generic_file_aio_write(struct 2196 extern ssize_t generic_file_aio_write(struct kiocb *, const struct iovec *, unsigned long, loff_t);
1808 extern ssize_t generic_file_aio_write_nolock( 2197 extern ssize_t generic_file_aio_write_nolock(struct kiocb *, const struct iovec *,
1809 unsigned long, loff_t); 2198 unsigned long, loff_t);
1810 extern ssize_t generic_file_direct_write(stru 2199 extern ssize_t generic_file_direct_write(struct kiocb *, const struct iovec *,
1811 unsigned long *, loff_t, loff 2200 unsigned long *, loff_t, loff_t *, size_t, size_t);
1812 extern ssize_t generic_file_buffered_write(st 2201 extern ssize_t generic_file_buffered_write(struct kiocb *, const struct iovec *,
1813 unsigned long, loff_t, loff_t 2202 unsigned long, loff_t, loff_t *, size_t, ssize_t);
1814 extern ssize_t do_sync_read(struct file *filp 2203 extern ssize_t do_sync_read(struct file *filp, char __user *buf, size_t len, loff_t *ppos);
1815 extern ssize_t do_sync_write(struct file *fil 2204 extern ssize_t do_sync_write(struct file *filp, const char __user *buf, size_t len, loff_t *ppos);
1816 extern int generic_segment_checks(const struc 2205 extern int generic_segment_checks(const struct iovec *iov,
1817 unsigned long *nr_segs, size_ 2206 unsigned long *nr_segs, size_t *count, int access_flags);
1818 2207
1819 /* fs/splice.c */ 2208 /* fs/splice.c */
1820 extern ssize_t generic_file_splice_read(struc 2209 extern ssize_t generic_file_splice_read(struct file *, loff_t *,
1821 struct pipe_inode_info *, siz 2210 struct pipe_inode_info *, size_t, unsigned int);
>> 2211 extern ssize_t default_file_splice_read(struct file *, loff_t *,
>> 2212 struct pipe_inode_info *, size_t, unsigned int);
1822 extern ssize_t generic_file_splice_write(stru 2213 extern ssize_t generic_file_splice_write(struct pipe_inode_info *,
1823 struct file *, loff_t *, size 2214 struct file *, loff_t *, size_t, unsigned int);
1824 extern ssize_t generic_file_splice_write_nolo <<
1825 struct file *, loff_t *, size <<
1826 extern ssize_t generic_splice_sendpage(struct 2215 extern ssize_t generic_splice_sendpage(struct pipe_inode_info *pipe,
1827 struct file *out, loff_t *, s 2216 struct file *out, loff_t *, size_t len, unsigned int flags);
1828 extern long do_splice_direct(struct file *in, 2217 extern long do_splice_direct(struct file *in, loff_t *ppos, struct file *out,
1829 size_t len, unsigned int flag 2218 size_t len, unsigned int flags);
1830 2219
1831 extern void 2220 extern void
1832 file_ra_state_init(struct file_ra_state *ra, 2221 file_ra_state_init(struct file_ra_state *ra, struct address_space *mapping);
1833 extern loff_t no_llseek(struct file *file, lo 2222 extern loff_t no_llseek(struct file *file, loff_t offset, int origin);
1834 extern loff_t generic_file_llseek(struct file 2223 extern loff_t generic_file_llseek(struct file *file, loff_t offset, int origin);
1835 extern loff_t remote_llseek(struct file *file !! 2224 extern loff_t generic_file_llseek_unlocked(struct file *file, loff_t offset,
>> 2225 int origin);
1836 extern int generic_file_open(struct inode * i 2226 extern int generic_file_open(struct inode * inode, struct file * filp);
1837 extern int nonseekable_open(struct inode * in 2227 extern int nonseekable_open(struct inode * inode, struct file * filp);
1838 2228
1839 #ifdef CONFIG_FS_XIP 2229 #ifdef CONFIG_FS_XIP
1840 extern ssize_t xip_file_read(struct file *fil 2230 extern ssize_t xip_file_read(struct file *filp, char __user *buf, size_t len,
1841 loff_t *ppos); 2231 loff_t *ppos);
1842 extern int xip_file_mmap(struct file * file, 2232 extern int xip_file_mmap(struct file * file, struct vm_area_struct * vma);
1843 extern ssize_t xip_file_write(struct file *fi 2233 extern ssize_t xip_file_write(struct file *filp, const char __user *buf,
1844 size_t len, lof 2234 size_t len, loff_t *ppos);
1845 extern int xip_truncate_page(struct address_s 2235 extern int xip_truncate_page(struct address_space *mapping, loff_t from);
1846 #else 2236 #else
1847 static inline int xip_truncate_page(struct ad 2237 static inline int xip_truncate_page(struct address_space *mapping, loff_t from)
1848 { 2238 {
1849 return 0; 2239 return 0;
1850 } 2240 }
1851 #endif 2241 #endif
1852 2242
1853 #ifdef CONFIG_BLOCK 2243 #ifdef CONFIG_BLOCK
1854 ssize_t __blockdev_direct_IO(int rw, struct k 2244 ssize_t __blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
1855 struct block_device *bdev, const stru 2245 struct block_device *bdev, const struct iovec *iov, loff_t offset,
1856 unsigned long nr_segs, get_block_t ge 2246 unsigned long nr_segs, get_block_t get_block, dio_iodone_t end_io,
1857 int lock_type); 2247 int lock_type);
1858 2248
1859 enum { 2249 enum {
1860 DIO_LOCKING = 1, /* need locking betw 2250 DIO_LOCKING = 1, /* need locking between buffered and direct access */
1861 DIO_NO_LOCKING, /* bdev; no locking 2251 DIO_NO_LOCKING, /* bdev; no locking at all between buffered/direct */
1862 DIO_OWN_LOCKING, /* filesystem locks 2252 DIO_OWN_LOCKING, /* filesystem locks buffered and direct internally */
1863 }; 2253 };
1864 2254
1865 static inline ssize_t blockdev_direct_IO(int 2255 static inline ssize_t blockdev_direct_IO(int rw, struct kiocb *iocb,
1866 struct inode *inode, struct block_dev 2256 struct inode *inode, struct block_device *bdev, const struct iovec *iov,
1867 loff_t offset, unsigned long nr_segs, 2257 loff_t offset, unsigned long nr_segs, get_block_t get_block,
1868 dio_iodone_t end_io) 2258 dio_iodone_t end_io)
1869 { 2259 {
1870 return __blockdev_direct_IO(rw, iocb, 2260 return __blockdev_direct_IO(rw, iocb, inode, bdev, iov, offset,
1871 nr_segs, get_ 2261 nr_segs, get_block, end_io, DIO_LOCKING);
1872 } 2262 }
1873 2263
1874 static inline ssize_t blockdev_direct_IO_no_l 2264 static inline ssize_t blockdev_direct_IO_no_locking(int rw, struct kiocb *iocb,
1875 struct inode *inode, struct block_dev 2265 struct inode *inode, struct block_device *bdev, const struct iovec *iov,
1876 loff_t offset, unsigned long nr_segs, 2266 loff_t offset, unsigned long nr_segs, get_block_t get_block,
1877 dio_iodone_t end_io) 2267 dio_iodone_t end_io)
1878 { 2268 {
1879 return __blockdev_direct_IO(rw, iocb, 2269 return __blockdev_direct_IO(rw, iocb, inode, bdev, iov, offset,
1880 nr_segs, get_ 2270 nr_segs, get_block, end_io, DIO_NO_LOCKING);
1881 } 2271 }
1882 2272
1883 static inline ssize_t blockdev_direct_IO_own_ 2273 static inline ssize_t blockdev_direct_IO_own_locking(int rw, struct kiocb *iocb,
1884 struct inode *inode, struct block_dev 2274 struct inode *inode, struct block_device *bdev, const struct iovec *iov,
1885 loff_t offset, unsigned long nr_segs, 2275 loff_t offset, unsigned long nr_segs, get_block_t get_block,
1886 dio_iodone_t end_io) 2276 dio_iodone_t end_io)
1887 { 2277 {
1888 return __blockdev_direct_IO(rw, iocb, 2278 return __blockdev_direct_IO(rw, iocb, inode, bdev, iov, offset,
1889 nr_segs, get_ 2279 nr_segs, get_block, end_io, DIO_OWN_LOCKING);
1890 } 2280 }
1891 #endif 2281 #endif
1892 2282
1893 extern const struct file_operations generic_r 2283 extern const struct file_operations generic_ro_fops;
1894 2284
1895 #define special_file(m) (S_ISCHR(m)||S_ISBLK( 2285 #define special_file(m) (S_ISCHR(m)||S_ISBLK(m)||S_ISFIFO(m)||S_ISSOCK(m))
1896 2286
1897 extern int vfs_readlink(struct dentry *, char 2287 extern int vfs_readlink(struct dentry *, char __user *, int, const char *);
1898 extern int vfs_follow_link(struct nameidata * 2288 extern int vfs_follow_link(struct nameidata *, const char *);
1899 extern int page_readlink(struct dentry *, cha 2289 extern int page_readlink(struct dentry *, char __user *, int);
1900 extern void *page_follow_link_light(struct de 2290 extern void *page_follow_link_light(struct dentry *, struct nameidata *);
1901 extern void page_put_link(struct dentry *, st 2291 extern void page_put_link(struct dentry *, struct nameidata *, void *);
1902 extern int __page_symlink(struct inode *inode 2292 extern int __page_symlink(struct inode *inode, const char *symname, int len,
1903 gfp_t gfp_mask); !! 2293 int nofs);
1904 extern int page_symlink(struct inode *inode, 2294 extern int page_symlink(struct inode *inode, const char *symname, int len);
1905 extern const struct inode_operations page_sym 2295 extern const struct inode_operations page_symlink_inode_operations;
1906 extern int generic_readlink(struct dentry *, 2296 extern int generic_readlink(struct dentry *, char __user *, int);
1907 extern void generic_fillattr(struct inode *, 2297 extern void generic_fillattr(struct inode *, struct kstat *);
1908 extern int vfs_getattr(struct vfsmount *, str 2298 extern int vfs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
>> 2299 void __inode_add_bytes(struct inode *inode, loff_t bytes);
1909 void inode_add_bytes(struct inode *inode, lof 2300 void inode_add_bytes(struct inode *inode, loff_t bytes);
1910 void inode_sub_bytes(struct inode *inode, lof 2301 void inode_sub_bytes(struct inode *inode, loff_t bytes);
1911 loff_t inode_get_bytes(struct inode *inode); 2302 loff_t inode_get_bytes(struct inode *inode);
1912 void inode_set_bytes(struct inode *inode, lof 2303 void inode_set_bytes(struct inode *inode, loff_t bytes);
1913 2304
1914 extern int vfs_readdir(struct file *, filldir 2305 extern int vfs_readdir(struct file *, filldir_t, void *);
1915 2306
1916 extern int vfs_stat(char __user *, struct kst 2307 extern int vfs_stat(char __user *, struct kstat *);
1917 extern int vfs_lstat(char __user *, struct ks 2308 extern int vfs_lstat(char __user *, struct kstat *);
1918 extern int vfs_stat_fd(int dfd, char __user * <<
1919 extern int vfs_lstat_fd(int dfd, char __user <<
1920 extern int vfs_fstat(unsigned int, struct kst 2309 extern int vfs_fstat(unsigned int, struct kstat *);
>> 2310 extern int vfs_fstatat(int , char __user *, struct kstat *, int);
1921 2311
1922 extern long vfs_ioctl(struct file *filp, unsi <<
1923 extern int do_vfs_ioctl(struct file *filp, un 2312 extern int do_vfs_ioctl(struct file *filp, unsigned int fd, unsigned int cmd,
1924 unsigned long arg); 2313 unsigned long arg);
>> 2314 extern int __generic_block_fiemap(struct inode *inode,
>> 2315 struct fiemap_extent_info *fieinfo, u64 start,
>> 2316 u64 len, get_block_t *get_block);
>> 2317 extern int generic_block_fiemap(struct inode *inode,
>> 2318 struct fiemap_extent_info *fieinfo, u64 start,
>> 2319 u64 len, get_block_t *get_block);
1925 2320
1926 extern void get_filesystem(struct file_system 2321 extern void get_filesystem(struct file_system_type *fs);
1927 extern void put_filesystem(struct file_system 2322 extern void put_filesystem(struct file_system_type *fs);
1928 extern struct file_system_type *get_fs_type(c 2323 extern struct file_system_type *get_fs_type(const char *name);
1929 extern struct super_block *get_super(struct b 2324 extern struct super_block *get_super(struct block_device *);
1930 extern struct super_block *user_get_super(dev 2325 extern struct super_block *user_get_super(dev_t);
1931 extern void drop_super(struct super_block *sb 2326 extern void drop_super(struct super_block *sb);
1932 2327
1933 extern int dcache_dir_open(struct inode *, st 2328 extern int dcache_dir_open(struct inode *, struct file *);
1934 extern int dcache_dir_close(struct inode *, s 2329 extern int dcache_dir_close(struct inode *, struct file *);
1935 extern loff_t dcache_dir_lseek(struct file *, 2330 extern loff_t dcache_dir_lseek(struct file *, loff_t, int);
1936 extern int dcache_readdir(struct file *, void 2331 extern int dcache_readdir(struct file *, void *, filldir_t);
1937 extern int simple_getattr(struct vfsmount *, 2332 extern int simple_getattr(struct vfsmount *, struct dentry *, struct kstat *);
1938 extern int simple_statfs(struct dentry *, str 2333 extern int simple_statfs(struct dentry *, struct kstatfs *);
1939 extern int simple_link(struct dentry *, struc 2334 extern int simple_link(struct dentry *, struct inode *, struct dentry *);
1940 extern int simple_unlink(struct inode *, stru 2335 extern int simple_unlink(struct inode *, struct dentry *);
1941 extern int simple_rmdir(struct inode *, struc 2336 extern int simple_rmdir(struct inode *, struct dentry *);
1942 extern int simple_rename(struct inode *, stru 2337 extern int simple_rename(struct inode *, struct dentry *, struct inode *, struct dentry *);
1943 extern int simple_sync_file(struct file *, st 2338 extern int simple_sync_file(struct file *, struct dentry *, int);
1944 extern int simple_empty(struct dentry *); 2339 extern int simple_empty(struct dentry *);
1945 extern int simple_readpage(struct file *file, 2340 extern int simple_readpage(struct file *file, struct page *page);
1946 extern int simple_prepare_write(struct file * 2341 extern int simple_prepare_write(struct file *file, struct page *page,
1947 unsigned offset, unsi 2342 unsigned offset, unsigned to);
1948 extern int simple_write_begin(struct file *fi 2343 extern int simple_write_begin(struct file *file, struct address_space *mapping,
1949 loff_t pos, unsigned 2344 loff_t pos, unsigned len, unsigned flags,
1950 struct page **pagep, 2345 struct page **pagep, void **fsdata);
1951 extern int simple_write_end(struct file *file 2346 extern int simple_write_end(struct file *file, struct address_space *mapping,
1952 loff_t pos, unsigned 2347 loff_t pos, unsigned len, unsigned copied,
1953 struct page *page, vo 2348 struct page *page, void *fsdata);
1954 2349
1955 extern struct dentry *simple_lookup(struct in 2350 extern struct dentry *simple_lookup(struct inode *, struct dentry *, struct nameidata *);
1956 extern ssize_t generic_read_dir(struct file * 2351 extern ssize_t generic_read_dir(struct file *, char __user *, size_t, loff_t *);
1957 extern const struct file_operations simple_di 2352 extern const struct file_operations simple_dir_operations;
1958 extern const struct inode_operations simple_d 2353 extern const struct inode_operations simple_dir_inode_operations;
1959 struct tree_descr { char *name; const struct 2354 struct tree_descr { char *name; const struct file_operations *ops; int mode; };
1960 struct dentry *d_alloc_name(struct dentry *, 2355 struct dentry *d_alloc_name(struct dentry *, const char *);
1961 extern int simple_fill_super(struct super_blo 2356 extern int simple_fill_super(struct super_block *, int, struct tree_descr *);
1962 extern int simple_pin_fs(struct file_system_t 2357 extern int simple_pin_fs(struct file_system_type *, struct vfsmount **mount, int *count);
1963 extern void simple_release_fs(struct vfsmount 2358 extern void simple_release_fs(struct vfsmount **mount, int *count);
1964 2359
1965 extern ssize_t simple_read_from_buffer(void _ !! 2360 extern ssize_t simple_read_from_buffer(void __user *to, size_t count,
>> 2361 loff_t *ppos, const void *from, size_t available);
>> 2362
>> 2363 extern int simple_fsync(struct file *, struct dentry *, int);
1966 2364
1967 #ifdef CONFIG_MIGRATION 2365 #ifdef CONFIG_MIGRATION
1968 extern int buffer_migrate_page(struct address 2366 extern int buffer_migrate_page(struct address_space *,
1969 struct page * 2367 struct page *, struct page *);
1970 #else 2368 #else
1971 #define buffer_migrate_page NULL 2369 #define buffer_migrate_page NULL
1972 #endif 2370 #endif
1973 2371
1974 extern int inode_change_ok(struct inode *, st 2372 extern int inode_change_ok(struct inode *, struct iattr *);
1975 extern int __must_check inode_setattr(struct 2373 extern int __must_check inode_setattr(struct inode *, struct iattr *);
1976 2374
1977 extern void file_update_time(struct file *fil 2375 extern void file_update_time(struct file *file);
1978 2376
1979 extern int generic_show_options(struct seq_fi 2377 extern int generic_show_options(struct seq_file *m, struct vfsmount *mnt);
1980 extern void save_mount_options(struct super_b 2378 extern void save_mount_options(struct super_block *sb, char *options);
>> 2379 extern void replace_mount_options(struct super_block *sb, char *options);
1981 2380
1982 static inline ino_t parent_ino(struct dentry 2381 static inline ino_t parent_ino(struct dentry *dentry)
1983 { 2382 {
1984 ino_t res; 2383 ino_t res;
1985 2384
1986 spin_lock(&dentry->d_lock); 2385 spin_lock(&dentry->d_lock);
1987 res = dentry->d_parent->d_inode->i_in 2386 res = dentry->d_parent->d_inode->i_ino;
1988 spin_unlock(&dentry->d_lock); 2387 spin_unlock(&dentry->d_lock);
1989 return res; 2388 return res;
1990 } 2389 }
1991 2390
1992 /* kernel/fork.c */ <<
1993 extern int unshare_files(void); <<
1994 <<
1995 /* Transaction based IO helpers */ 2391 /* Transaction based IO helpers */
1996 2392
1997 /* 2393 /*
1998 * An argresp is stored in an allocated page 2394 * An argresp is stored in an allocated page and holds the
1999 * size of the argument or response, along wi 2395 * size of the argument or response, along with its content
2000 */ 2396 */
2001 struct simple_transaction_argresp { 2397 struct simple_transaction_argresp {
2002 ssize_t size; 2398 ssize_t size;
2003 char data[0]; 2399 char data[0];
2004 }; 2400 };
2005 2401
2006 #define SIMPLE_TRANSACTION_LIMIT (PAGE_SIZE - 2402 #define SIMPLE_TRANSACTION_LIMIT (PAGE_SIZE - sizeof(struct simple_transaction_argresp))
2007 2403
2008 char *simple_transaction_get(struct file *fil 2404 char *simple_transaction_get(struct file *file, const char __user *buf,
2009 size_t size); 2405 size_t size);
2010 ssize_t simple_transaction_read(struct file * 2406 ssize_t simple_transaction_read(struct file *file, char __user *buf,
2011 size_t size, 2407 size_t size, loff_t *pos);
2012 int simple_transaction_release(struct inode * 2408 int simple_transaction_release(struct inode *inode, struct file *file);
2013 2409
2014 static inline void simple_transaction_set(str !! 2410 void simple_transaction_set(struct file *file, size_t n);
2015 { <<
2016 struct simple_transaction_argresp *ar <<
2017 <<
2018 BUG_ON(n > SIMPLE_TRANSACTION_LIMIT); <<
2019 <<
2020 /* <<
2021 * The barrier ensures that ar->size <<
2022 * ar->data is ready for reading. <<
2023 */ <<
2024 smp_mb(); <<
2025 ar->size = n; <<
2026 } <<
2027 2411
2028 /* 2412 /*
2029 * simple attribute files 2413 * simple attribute files
2030 * 2414 *
2031 * These attributes behave similar to those i 2415 * These attributes behave similar to those in sysfs:
2032 * 2416 *
2033 * Writing to an attribute immediately sets a 2417 * Writing to an attribute immediately sets a value, an open file can be
2034 * written to multiple times. 2418 * written to multiple times.
2035 * 2419 *
2036 * Reading from an attribute creates a buffer 2420 * Reading from an attribute creates a buffer from the value that might get
2037 * read with multiple read calls. When the at 2421 * read with multiple read calls. When the attribute has been read
2038 * completely, no further read calls are poss 2422 * completely, no further read calls are possible until the file is opened
2039 * again. 2423 * again.
2040 * 2424 *
2041 * All attributes contain a text representati 2425 * All attributes contain a text representation of a numeric value
2042 * that are accessed with the get() and set() 2426 * that are accessed with the get() and set() functions.
2043 */ 2427 */
2044 #define DEFINE_SIMPLE_ATTRIBUTE(__fops, __get 2428 #define DEFINE_SIMPLE_ATTRIBUTE(__fops, __get, __set, __fmt) \
2045 static int __fops ## _open(struct inode *inod 2429 static int __fops ## _open(struct inode *inode, struct file *file) \
2046 { 2430 { \
2047 __simple_attr_check_format(__fmt, 0ul 2431 __simple_attr_check_format(__fmt, 0ull); \
2048 return simple_attr_open(inode, file, 2432 return simple_attr_open(inode, file, __get, __set, __fmt); \
2049 } 2433 } \
2050 static struct file_operations __fops = { 2434 static struct file_operations __fops = { \
2051 .owner = THIS_MODULE, 2435 .owner = THIS_MODULE, \
2052 .open = __fops ## _open, 2436 .open = __fops ## _open, \
2053 .release = simple_attr_release, 2437 .release = simple_attr_release, \
2054 .read = simple_attr_read, 2438 .read = simple_attr_read, \
2055 .write = simple_attr_write, 2439 .write = simple_attr_write, \
2056 }; 2440 };
2057 2441
2058 static inline void __attribute__((format(prin 2442 static inline void __attribute__((format(printf, 1, 2)))
2059 __simple_attr_check_format(const char *fmt, . 2443 __simple_attr_check_format(const char *fmt, ...)
2060 { 2444 {
2061 /* don't do anything, just let the co 2445 /* don't do anything, just let the compiler check the arguments; */
2062 } 2446 }
2063 2447
2064 int simple_attr_open(struct inode *inode, str 2448 int simple_attr_open(struct inode *inode, struct file *file,
2065 int (*get)(void *, u64 * 2449 int (*get)(void *, u64 *), int (*set)(void *, u64),
2066 const char *fmt); 2450 const char *fmt);
2067 int simple_attr_release(struct inode *inode, 2451 int simple_attr_release(struct inode *inode, struct file *file);
2068 ssize_t simple_attr_read(struct file *file, c 2452 ssize_t simple_attr_read(struct file *file, char __user *buf,
2069 size_t len, loff_t * 2453 size_t len, loff_t *ppos);
2070 ssize_t simple_attr_write(struct file *file, 2454 ssize_t simple_attr_write(struct file *file, const char __user *buf,
2071 size_t len, loff_t 2455 size_t len, loff_t *ppos);
2072 2456
2073 <<
2074 #ifdef CONFIG_SECURITY <<
2075 static inline char *alloc_secdata(void) <<
2076 { <<
2077 return (char *)get_zeroed_page(GFP_KE <<
2078 } <<
2079 <<
2080 static inline void free_secdata(void *secdata <<
2081 { <<
2082 free_page((unsigned long)secdata); <<
2083 } <<
2084 #else <<
2085 static inline char *alloc_secdata(void) <<
2086 { <<
2087 return (char *)1; <<
2088 } <<
2089 <<
2090 static inline void free_secdata(void *secdata <<
2091 { } <<
2092 #endif /* CONFIG_SECURITY */ <<
2093 <<
2094 struct ctl_table; 2457 struct ctl_table;
2095 int proc_nr_files(struct ctl_table *table, in 2458 int proc_nr_files(struct ctl_table *table, int write, struct file *filp,
2096 void __user *buffer, size_t 2459 void __user *buffer, size_t *lenp, loff_t *ppos);
2097 2460
2098 int get_filesystem_list(char * buf); !! 2461 int __init get_filesystem_list(char *buf);
2099 2462
2100 #endif /* __KERNEL__ */ 2463 #endif /* __KERNEL__ */
2101 #endif /* _LINUX_FS_H */ 2464 #endif /* _LINUX_FS_H */
2102 2465
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