diff options
author | Jan Kara <jack@suse.cz> | 2016-03-09 04:08:10 (GMT) |
---|---|---|
committer | Theodore Ts'o <tytso@mit.edu> | 2016-03-09 04:08:10 (GMT) |
commit | 705965bd6dfadc3b2e0241da1423ef660bdd04c8 (patch) | |
tree | c29f27d3d461da8b36c7708ea5f21778b7df40c3 /fs | |
parent | e142d05263a4beedefd331d445c394f4397e9f03 (diff) | |
download | linux-705965bd6dfadc3b2e0241da1423ef660bdd04c8.tar.xz |
ext4: rename and split get blocks functions
Rename ext4_get_blocks_write() to ext4_get_blocks_unwritten() to better
describe what it does. Also split out get blocks functions for direct
IO. Later we move functionality from _ext4_get_blocks() there. There's no
functional change in this patch.
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs')
-rw-r--r-- | fs/ext4/ext4.h | 8 | ||||
-rw-r--r-- | fs/ext4/indirect.c | 10 | ||||
-rw-r--r-- | fs/ext4/inline.c | 7 | ||||
-rw-r--r-- | fs/ext4/inode.c | 96 |
4 files changed, 74 insertions, 47 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index f4e9521..d60db18 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -2506,12 +2506,14 @@ extern int ext4_trim_fs(struct super_block *, struct fstrim_range *); int ext4_inode_is_fast_symlink(struct inode *inode); struct buffer_head *ext4_getblk(handle_t *, struct inode *, ext4_lblk_t, int); struct buffer_head *ext4_bread(handle_t *, struct inode *, ext4_lblk_t, int); -int ext4_get_block_write(struct inode *inode, sector_t iblock, - struct buffer_head *bh_result, int create); +int ext4_get_block_unwritten(struct inode *inode, sector_t iblock, + struct buffer_head *bh_result, int create); int ext4_dax_mmap_get_block(struct inode *inode, sector_t iblock, struct buffer_head *bh_result, int create); int ext4_get_block(struct inode *inode, sector_t iblock, - struct buffer_head *bh_result, int create); + struct buffer_head *bh_result, int create); +int ext4_dio_get_block(struct inode *inode, sector_t iblock, + struct buffer_head *bh_result, int create); int ext4_da_get_block_prep(struct inode *inode, sector_t iblock, struct buffer_head *bh, int create); int ext4_walk_page_buffers(handle_t *handle, diff --git a/fs/ext4/indirect.c b/fs/ext4/indirect.c index 355ef9c..1655ff1 100644 --- a/fs/ext4/indirect.c +++ b/fs/ext4/indirect.c @@ -693,21 +693,21 @@ retry: } if (IS_DAX(inode)) ret = dax_do_io(iocb, inode, iter, offset, - ext4_get_block, NULL, 0); + ext4_dio_get_block, NULL, 0); else ret = __blockdev_direct_IO(iocb, inode, inode->i_sb->s_bdev, iter, - offset, ext4_get_block, NULL, - NULL, 0); + offset, ext4_dio_get_block, + NULL, NULL, 0); inode_dio_end(inode); } else { locked: if (IS_DAX(inode)) ret = dax_do_io(iocb, inode, iter, offset, - ext4_get_block, NULL, DIO_LOCKING); + ext4_dio_get_block, NULL, DIO_LOCKING); else ret = blockdev_direct_IO(iocb, inode, iter, offset, - ext4_get_block); + ext4_dio_get_block); if (unlikely(iov_iter_rw(iter) == WRITE && ret < 0)) { loff_t isize = i_size_read(inode); diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c index dfe3b9b..36d8cc9 100644 --- a/fs/ext4/inline.c +++ b/fs/ext4/inline.c @@ -581,9 +581,10 @@ retry: if (ret) goto out; - if (ext4_should_dioread_nolock(inode)) - ret = __block_write_begin(page, from, to, ext4_get_block_write); - else + if (ext4_should_dioread_nolock(inode)) { + ret = __block_write_begin(page, from, to, + ext4_get_block_unwritten); + } else ret = __block_write_begin(page, from, to, ext4_get_block); if (!ret && ext4_should_journal_data(inode)) { diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 9cc57c3..bf545d0 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -769,6 +769,60 @@ int ext4_get_block(struct inode *inode, sector_t iblock, } /* + * Get block function used when preparing for buffered write if we require + * creating an unwritten extent if blocks haven't been allocated. The extent + * will be converted to written after the IO is complete. + */ +int ext4_get_block_unwritten(struct inode *inode, sector_t iblock, + struct buffer_head *bh_result, int create) +{ + ext4_debug("ext4_get_block_unwritten: inode %lu, create flag %d\n", + inode->i_ino, create); + return _ext4_get_block(inode, iblock, bh_result, + EXT4_GET_BLOCKS_IO_CREATE_EXT); +} + +/* Get block function for DIO reads and writes to inodes without extents */ +int ext4_dio_get_block(struct inode *inode, sector_t iblock, + struct buffer_head *bh, int create) +{ + return _ext4_get_block(inode, iblock, bh, + create ? EXT4_GET_BLOCKS_CREATE : 0); +} + +/* + * Get block function for DIO writes when we create unwritten extent if + * blocks are not allocated yet. The extent will be converted to written + * after IO is complete. + */ +static int ext4_dio_get_block_unwritten(struct inode *inode, sector_t iblock, + struct buffer_head *bh_result, int create) +{ + ext4_debug("ext4_dio_get_block_unwritten: inode %lu, create flag %d\n", + inode->i_ino, create); + return _ext4_get_block(inode, iblock, bh_result, + EXT4_GET_BLOCKS_IO_CREATE_EXT); +} + +static int ext4_dio_get_block_overwrite(struct inode *inode, sector_t iblock, + struct buffer_head *bh_result, int create) +{ + int ret; + + ext4_debug("ext4_dio_get_block_overwrite: inode %lu, create flag %d\n", + inode->i_ino, create); + ret = _ext4_get_block(inode, iblock, bh_result, 0); + /* + * Blocks should have been preallocated! ext4_file_write_iter() checks + * that. + */ + WARN_ON_ONCE(!buffer_mapped(bh_result)); + + return ret; +} + + +/* * `handle' can be NULL if create is zero */ struct buffer_head *ext4_getblk(handle_t *handle, struct inode *inode, @@ -1079,13 +1133,14 @@ retry_journal: #ifdef CONFIG_EXT4_FS_ENCRYPTION if (ext4_should_dioread_nolock(inode)) ret = ext4_block_write_begin(page, pos, len, - ext4_get_block_write); + ext4_get_block_unwritten); else ret = ext4_block_write_begin(page, pos, len, ext4_get_block); #else if (ext4_should_dioread_nolock(inode)) - ret = __block_write_begin(page, pos, len, ext4_get_block_write); + ret = __block_write_begin(page, pos, len, + ext4_get_block_unwritten); else ret = __block_write_begin(page, pos, len, ext4_get_block); #endif @@ -3084,37 +3139,6 @@ static int ext4_releasepage(struct page *page, gfp_t wait) return try_to_free_buffers(page); } -/* - * ext4_get_block used when preparing for a DIO write or buffer write. - * We allocate an uinitialized extent if blocks haven't been allocated. - * The extent will be converted to initialized after the IO is complete. - */ -int ext4_get_block_write(struct inode *inode, sector_t iblock, - struct buffer_head *bh_result, int create) -{ - ext4_debug("ext4_get_block_write: inode %lu, create flag %d\n", - inode->i_ino, create); - return _ext4_get_block(inode, iblock, bh_result, - EXT4_GET_BLOCKS_IO_CREATE_EXT); -} - -static int ext4_get_block_overwrite(struct inode *inode, sector_t iblock, - struct buffer_head *bh_result, int create) -{ - int ret; - - ext4_debug("ext4_get_block_overwrite: inode %lu, create flag %d\n", - inode->i_ino, create); - ret = _ext4_get_block(inode, iblock, bh_result, 0); - /* - * Blocks should have been preallocated! ext4_file_write_iter() checks - * that. - */ - WARN_ON_ONCE(!buffer_mapped(bh_result)); - - return ret; -} - #ifdef CONFIG_FS_DAX int ext4_dax_mmap_get_block(struct inode *inode, sector_t iblock, struct buffer_head *bh_result, int create) @@ -3282,7 +3306,7 @@ static ssize_t ext4_ext_direct_IO(struct kiocb *iocb, struct iov_iter *iter, */ iocb->private = NULL; if (overwrite) { - get_block_func = ext4_get_block_overwrite; + get_block_func = ext4_dio_get_block_overwrite; } else { ext4_inode_aio_set(inode, NULL); if (!is_sync_kiocb(iocb)) { @@ -3304,7 +3328,7 @@ static ssize_t ext4_ext_direct_IO(struct kiocb *iocb, struct iov_iter *iter, */ ext4_inode_aio_set(inode, io_end); } - get_block_func = ext4_get_block_write; + get_block_func = ext4_dio_get_block_unwritten; dio_flags = DIO_LOCKING; } #ifdef CONFIG_EXT4_FS_ENCRYPTION @@ -5498,7 +5522,7 @@ int ext4_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) unlock_page(page); /* OK, we need to fill the hole... */ if (ext4_should_dioread_nolock(inode)) - get_block = ext4_get_block_write; + get_block = ext4_get_block_unwritten; else get_block = ext4_get_block; retry_alloc: |