Merge branch 'topic/pcxhr' into for-linus

[linux-2.6-omap-h63xx.git] / include / linux / fs.h

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 0b87b29f4797fa9960373a24194501f0ebc5fab9..92734c0012e679cb3326ba25be08f52dce81fbc8 100644 (file)
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -54,24 +54,30 @@ struct inodes_stat_t {
 #define MAY_ACCESS 16
 #define MAY_OPEN 32
 
+/*
+ * flags in file.f_mode.  Note that FMODE_READ and FMODE_WRITE must correspond
+ * to O_WRONLY and O_RDWR via the strange trick in __dentry_open()
+ */
+
 /* file is open for reading */
 #define FMODE_READ             ((__force fmode_t)1)
 /* file is open for writing */
 #define FMODE_WRITE            ((__force fmode_t)2)
 /* file is seekable */
 #define FMODE_LSEEK            ((__force fmode_t)4)
-/* file can be accessed using pread/pwrite */
+/* file can be accessed using pread */
 #define FMODE_PREAD            ((__force fmode_t)8)
-#define FMODE_PWRITE           FMODE_PREAD     /* These go hand in hand */
+/* file can be accessed using pwrite */
+#define FMODE_PWRITE           ((__force fmode_t)16)
 /* File is opened for execution with sys_execve / sys_uselib */
-#define FMODE_EXEC             ((__force fmode_t)16)
+#define FMODE_EXEC             ((__force fmode_t)32)
 /* File is opened with O_NDELAY (only set for block devices) */
-#define FMODE_NDELAY           ((__force fmode_t)32)
+#define FMODE_NDELAY           ((__force fmode_t)64)
 /* File is opened with O_EXCL (only set for block devices) */
-#define FMODE_EXCL             ((__force fmode_t)64)
+#define FMODE_EXCL             ((__force fmode_t)128)
 /* File is opened using open(.., 3, ..) and is writeable only for ioctls
    (specialy hack for floppy.c) */
-#define FMODE_WRITE_IOCTL      ((__force fmode_t)128)
+#define FMODE_WRITE_IOCTL      ((__force fmode_t)256)
 
 /*
  * Don't update ctime and mtime.
@@ -87,10 +93,10 @@ struct inodes_stat_t {
 #define WRITE 1
 #define READA 2                /* read-ahead  - don't block if no resources */
 #define SWRITE 3       /* for ll_rw_block() - wait for buffer lock */
-#define READ_SYNC      (READ | (1 << BIO_RW_SYNC))
+#define READ_SYNC      (READ | (1 << BIO_RW_SYNCIO) | (1 << BIO_RW_UNPLUG))
 #define READ_META      (READ | (1 << BIO_RW_META))
-#define WRITE_SYNC     (WRITE | (1 << BIO_RW_SYNC))
-#define SWRITE_SYNC    (SWRITE | (1 << BIO_RW_SYNC))
+#define WRITE_SYNC     (WRITE | (1 << BIO_RW_SYNCIO) | (1 << BIO_RW_UNPLUG))
+#define SWRITE_SYNC    (SWRITE | (1 << BIO_RW_SYNCIO) | (1 << BIO_RW_UNPLUG))
 #define WRITE_BARRIER  (WRITE | (1 << BIO_RW_BARRIER))
 #define DISCARD_NOBARRIER (1 << BIO_RW_DISCARD)
 #define DISCARD_BARRIER ((1 << BIO_RW_DISCARD) | (1 << BIO_RW_BARRIER))
@@ -234,6 +240,8 @@ struct inodes_stat_t {
 #define BMAP_IOCTL 1           /* obsolete - kept for compatibility */
 #define FIBMAP    _IO(0x00,1)  /* bmap access */
 #define FIGETBSZ   _IO(0x00,2) /* get the block size used for bmap */
+#define FIFREEZE       _IOWR('X', 119, int)    /* Freeze */
+#define FITHAW         _IOWR('X', 120, int)    /* Thaw */
 
 #define        FS_IOC_GETFLAGS                 _IOR('f', 1, long)
 #define        FS_IOC_SETFLAGS                 _IOW('f', 2, long)
@@ -591,6 +599,11 @@ struct block_device {
         * care to not mess up bd_private for that case.
         */
        unsigned long           bd_private;
+
+       /* The counter of freeze processes */
+       int                     bd_fsfreeze_count;
+       /* Mutex for freeze */
+       struct mutex            bd_fsfreeze_mutex;
 };
 
 /*
@@ -1377,8 +1390,8 @@ struct super_operations {
        void (*put_super) (struct super_block *);
        void (*write_super) (struct super_block *);
        int (*sync_fs)(struct super_block *sb, int wait);
-       void (*write_super_lockfs) (struct super_block *);
-       void (*unlockfs) (struct super_block *);
+       int (*freeze_fs) (struct super_block *);
+       int (*unfreeze_fs) (struct super_block *);
        int (*statfs) (struct dentry *, struct kstatfs *);
        int (*remount_fs) (struct super_block *, int *, char *);
        void (*clear_inode) (struct inode *);