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| author | Ross Zwisler | 2015-02-17 00:59:38 +0100 |
|---|---|---|
| committer | Linus Torvalds | 2015-02-17 02:56:04 +0100 |
| commit | 923ae0ff9250430133b3310fe62c47538cf1cbc1 (patch) | |
| tree | 3c4194cbedbe77e719bf7c8762fba5362ec26032 /fs/ext4/ext4.h | |
| parent | dax: add dax_zero_page_range (diff) | |
| download | kernel-qcow2-linux-923ae0ff9250430133b3310fe62c47538cf1cbc1.tar.gz kernel-qcow2-linux-923ae0ff9250430133b3310fe62c47538cf1cbc1.tar.xz kernel-qcow2-linux-923ae0ff9250430133b3310fe62c47538cf1cbc1.zip | |
ext4: add DAX functionality
This is a port of the DAX functionality found in the current version of
ext2.
[matthew.r.wilcox@intel.com: heavily tweaked]
[akpm@linux-foundation.org: remap_pages went away]
Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Cc: Boaz Harrosh <boaz@plexistor.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/ext4/ext4.h')
| -rw-r--r-- | fs/ext4/ext4.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index a75fba67bb1f..982d934fd9ac 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -965,6 +965,11 @@ struct ext4_inode_info { #define EXT4_MOUNT_ERRORS_MASK 0x00070 #define EXT4_MOUNT_MINIX_DF 0x00080 /* Mimics the Minix statfs */ #define EXT4_MOUNT_NOLOAD 0x00100 /* Don't use existing journal*/ +#ifdef CONFIG_FS_DAX +#define EXT4_MOUNT_DAX 0x00200 /* Direct Access */ +#else +#define EXT4_MOUNT_DAX 0 +#endif #define EXT4_MOUNT_DATA_FLAGS 0x00C00 /* Mode for data writes: */ #define EXT4_MOUNT_JOURNAL_DATA 0x00400 /* Write data to journal */ #define EXT4_MOUNT_ORDERED_DATA 0x00800 /* Flush data before commit */ @@ -2578,6 +2583,7 @@ extern const struct file_operations ext4_dir_operations; /* file.c */ extern const struct inode_operations ext4_file_inode_operations; extern const struct file_operations ext4_file_operations; +extern const struct file_operations ext4_dax_file_operations; extern loff_t ext4_llseek(struct file *file, loff_t offset, int origin); /* inline.c */ |