diff options
author | Ross Zwisler <ross.zwisler@linux.intel.com> | 2015-02-16 23:59:38 (GMT) |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-02-17 01:56:04 (GMT) |
commit | 923ae0ff9250430133b3310fe62c47538cf1cbc1 (patch) | |
tree | 3c4194cbedbe77e719bf7c8762fba5362ec26032 /fs/ext4/file.c | |
parent | 25726bc15731d42112b579cf73f30edbc43d3973 (diff) | |
download | linux-923ae0ff9250430133b3310fe62c47538cf1cbc1.tar.xz |
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/file.c')
-rw-r--r-- | fs/ext4/file.c | 49 |
1 files changed, 47 insertions, 2 deletions
diff --git a/fs/ext4/file.c b/fs/ext4/file.c index 7cb5923..33a09da 100644 --- a/fs/ext4/file.c +++ b/fs/ext4/file.c @@ -95,7 +95,7 @@ ext4_file_write_iter(struct kiocb *iocb, struct iov_iter *from) struct inode *inode = file_inode(iocb->ki_filp); struct mutex *aio_mutex = NULL; struct blk_plug plug; - int o_direct = file->f_flags & O_DIRECT; + int o_direct = io_is_direct(file); int overwrite = 0; size_t length = iov_iter_count(from); ssize_t ret; @@ -191,6 +191,26 @@ errout: return ret; } +#ifdef CONFIG_FS_DAX +static int ext4_dax_fault(struct vm_area_struct *vma, struct vm_fault *vmf) +{ + return dax_fault(vma, vmf, ext4_get_block); + /* Is this the right get_block? */ +} + +static int ext4_dax_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) +{ + return dax_mkwrite(vma, vmf, ext4_get_block); +} + +static const struct vm_operations_struct ext4_dax_vm_ops = { + .fault = ext4_dax_fault, + .page_mkwrite = ext4_dax_mkwrite, +}; +#else +#define ext4_dax_vm_ops ext4_file_vm_ops +#endif + static const struct vm_operations_struct ext4_file_vm_ops = { .fault = filemap_fault, .map_pages = filemap_map_pages, @@ -200,7 +220,12 @@ static const struct vm_operations_struct ext4_file_vm_ops = { static int ext4_file_mmap(struct file *file, struct vm_area_struct *vma) { file_accessed(file); - vma->vm_ops = &ext4_file_vm_ops; + if (IS_DAX(file_inode(file))) { + vma->vm_ops = &ext4_dax_vm_ops; + vma->vm_flags |= VM_MIXEDMAP; + } else { + vma->vm_ops = &ext4_file_vm_ops; + } return 0; } @@ -599,6 +624,26 @@ const struct file_operations ext4_file_operations = { .fallocate = ext4_fallocate, }; +#ifdef CONFIG_FS_DAX +const struct file_operations ext4_dax_file_operations = { + .llseek = ext4_llseek, + .read = new_sync_read, + .write = new_sync_write, + .read_iter = generic_file_read_iter, + .write_iter = ext4_file_write_iter, + .unlocked_ioctl = ext4_ioctl, +#ifdef CONFIG_COMPAT + .compat_ioctl = ext4_compat_ioctl, +#endif + .mmap = ext4_file_mmap, + .open = ext4_file_open, + .release = ext4_release_file, + .fsync = ext4_sync_file, + /* Splice not yet supported with DAX */ + .fallocate = ext4_fallocate, +}; +#endif + const struct inode_operations ext4_file_inode_operations = { .setattr = ext4_setattr, .getattr = ext4_getattr, |