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| author | Ritesh Harjani <riteshh@linux.ibm.com> | 2019-10-16 13:07:10 +0530 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2019-10-22 15:32:53 -0400 |
| commit | c8cc88163f40df39e50cda63ac361631864b453e (patch) | |
| tree | f562970d46082d4f02ffa4f19faf15a1a97f94b8 /fs/ext4/extents.c | |
| parent | 2943fdbc688e7a1b4d9e3bc76a8e5ba624550213 (diff) | |
| download | linux-c8cc88163f40df39e50cda63ac361631864b453e.tar.gz | |
ext4: Add support for blocksize < pagesize in dioread_nolock
This patch adds the support for blocksize < pagesize for
dioread_nolock feature.
Since in case of blocksize < pagesize, we can have multiple
small buffers of page as unwritten extents, we need to
maintain a vector of these unwritten extents which needs
the conversion after the IO is complete. Thus, we maintain
a list of tuple <offset, size> pair (io_end_vec) for this &
traverse this list to do the unwritten to written conversion.
Signed-off-by: Ritesh Harjani <riteshh@linux.ibm.com>
Link: https://lore.kernel.org/r/20191016073711.4141-5-riteshh@linux.ibm.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/extents.c')
| -rw-r--r-- | fs/ext4/extents.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index 731e67ccab22f3..cf6c5f64cb5893 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -5005,6 +5005,7 @@ int ext4_convert_unwritten_extents(handle_t *handle, struct inode *inode, int ext4_convert_unwritten_io_end_vec(handle_t *handle, ext4_io_end_t *io_end) { int ret, err = 0; + struct ext4_io_end_vec *io_end_vec; /* * This is somewhat ugly but the idea is clear: When transaction is @@ -5018,8 +5019,14 @@ int ext4_convert_unwritten_io_end_vec(handle_t *handle, ext4_io_end_t *io_end) return PTR_ERR(handle); } - ret = ext4_convert_unwritten_extents(handle, io_end->inode, - io_end->offset, io_end->size); + list_for_each_entry(io_end_vec, &io_end->list_vec, list) { + ret = ext4_convert_unwritten_extents(handle, io_end->inode, + io_end_vec->offset, + io_end_vec->size); + if (ret) + break; + } + if (handle) err = ext4_journal_stop(handle); |