return generic_file_llseek_size(file, offset, whence, isize, isize);
}
+struct zonefs_zone_append_bio {
+ /* The target inode of the BIO */
+ struct inode *inode;
+
+ /* For sync writes, the target append write offset */
+ u64 append_offset;
+
+ /*
+ * This member must come last, bio_alloc_bioset will allocate enough
+ * bytes for entire zonefs_bio but relies on bio being last.
+ */
+ struct bio bio;
+};
+
+static inline struct zonefs_zone_append_bio *
+zonefs_zone_append_bio(struct bio *bio)
+{
+ return container_of(bio, struct zonefs_zone_append_bio, bio);
+}
+
+static void zonefs_file_zone_append_dio_bio_end_io(struct bio *bio)
+{
+ struct zonefs_zone_append_bio *za_bio = zonefs_zone_append_bio(bio);
+ struct zonefs_zone *z = zonefs_inode_zone(za_bio->inode);
+ sector_t za_sector;
+
+ if (bio->bi_status != BLK_STS_OK)
+ goto bio_end;
+
+ /*
+ * If the file zone was written underneath the file system, the zone
+ * append operation can still succedd (if the zone is not full) but
+ * the write append location will not be where we expect it to be.
+ * Check that we wrote where we intended to, that is, at z->z_wpoffset.
+ */
+ za_sector = z->z_sector + (za_bio->append_offset >> SECTOR_SHIFT);
+ if (bio->bi_iter.bi_sector != za_sector) {
+ zonefs_warn(za_bio->inode->i_sb,
+ "Invalid write sector %llu for zone at %llu\n",
+ bio->bi_iter.bi_sector, z->z_sector);
+ bio->bi_status = BLK_STS_IOERR;
+ }
+
+bio_end:
+ iomap_dio_bio_end_io(bio);
+}
+
+static void zonefs_file_zone_append_dio_submit_io(const struct iomap_iter *iter,
+ struct bio *bio,
+ loff_t file_offset)
+{
+ struct zonefs_zone_append_bio *za_bio = zonefs_zone_append_bio(bio);
+ struct inode *inode = iter->inode;
+ struct zonefs_zone *z = zonefs_inode_zone(inode);
+
+ /*
+ * Issue a zone append BIO to process sync dio writes. The append
+ * file offset is saved to check the zone append write location
+ * on completion of the BIO.
+ */
+ za_bio->inode = inode;
+ za_bio->append_offset = file_offset;
+
+ bio->bi_opf &= ~REQ_OP_WRITE;
+ bio->bi_opf |= REQ_OP_ZONE_APPEND;
+ bio->bi_iter.bi_sector = z->z_sector;
+ bio->bi_end_io = zonefs_file_zone_append_dio_bio_end_io;
+
+ submit_bio(bio);
+}
+
static int zonefs_file_write_dio_end_io(struct kiocb *iocb, ssize_t size,
int error, unsigned int flags)
{
return 0;
}
-static const struct iomap_dio_ops zonefs_write_dio_ops = {
- .end_io = zonefs_file_write_dio_end_io,
-};
+static struct bio_set zonefs_zone_append_bio_set;
-static ssize_t zonefs_file_dio_append(struct kiocb *iocb, struct iov_iter *from)
-{
- struct inode *inode = file_inode(iocb->ki_filp);
- struct zonefs_zone *z = zonefs_inode_zone(inode);
- struct block_device *bdev = inode->i_sb->s_bdev;
- unsigned int max = bdev_max_zone_append_sectors(bdev);
- pgoff_t start, end;
- struct bio *bio;
- ssize_t size = 0;
- int nr_pages;
- ssize_t ret;
-
- max = ALIGN_DOWN(max << SECTOR_SHIFT, inode->i_sb->s_blocksize);
- iov_iter_truncate(from, max);
-
- /*
- * If the inode block size (zone write granularity) is smaller than the
- * page size, we may be appending data belonging to the last page of the
- * inode straddling inode->i_size, with that page already cached due to
- * a buffered read or readahead. So make sure to invalidate that page.
- * This will always be a no-op for the case where the block size is
- * equal to the page size.
- */
- start = iocb->ki_pos >> PAGE_SHIFT;
- end = (iocb->ki_pos + iov_iter_count(from) - 1) >> PAGE_SHIFT;
- if (invalidate_inode_pages2_range(inode->i_mapping, start, end))
- return -EBUSY;
-
- nr_pages = iov_iter_npages(from, BIO_MAX_VECS);
- if (!nr_pages)
- return 0;
-
- bio = bio_alloc(bdev, nr_pages,
- REQ_OP_ZONE_APPEND | REQ_SYNC | REQ_IDLE, GFP_NOFS);
- bio->bi_iter.bi_sector = z->z_sector;
- bio->bi_ioprio = iocb->ki_ioprio;
- if (iocb_is_dsync(iocb))
- bio->bi_opf |= REQ_FUA;
-
- ret = bio_iov_iter_get_pages(bio, from);
- if (unlikely(ret))
- goto out_release;
-
- size = bio->bi_iter.bi_size;
- task_io_account_write(size);
-
- if (iocb->ki_flags & IOCB_HIPRI)
- bio_set_polled(bio, iocb);
-
- ret = submit_bio_wait(bio);
-
- /*
- * If the file zone was written underneath the file system, the zone
- * write pointer may not be where we expect it to be, but the zone
- * append write can still succeed. So check manually that we wrote where
- * we intended to, that is, at zi->i_wpoffset.
- */
- if (!ret) {
- sector_t wpsector =
- z->z_sector + (z->z_wpoffset >> SECTOR_SHIFT);
-
- if (bio->bi_iter.bi_sector != wpsector) {
- zonefs_warn(inode->i_sb,
- "Corrupted write pointer %llu for zone at %llu\n",
- bio->bi_iter.bi_sector, z->z_sector);
- ret = -EIO;
- }
- }
-
- zonefs_file_write_dio_end_io(iocb, size, ret, 0);
- trace_zonefs_file_dio_append(inode, size, ret);
-
-out_release:
- bio_release_pages(bio, false);
- bio_put(bio);
-
- if (ret >= 0) {
- iocb->ki_pos += size;
- return size;
- }
+static const struct iomap_dio_ops zonefs_zone_append_dio_ops = {
+ .submit_io = zonefs_file_zone_append_dio_submit_io,
+ .end_io = zonefs_file_write_dio_end_io,
+ .bio_set = &zonefs_zone_append_bio_set,
+};
- return ret;
-}
+static const struct iomap_dio_ops zonefs_write_dio_ops = {
+ .end_io = zonefs_file_write_dio_end_io,
+};
/*
* Do not exceed the LFS limits nor the file zone size. If pos is under the
struct zonefs_inode_info *zi = ZONEFS_I(inode);
struct zonefs_zone *z = zonefs_inode_zone(inode);
struct super_block *sb = inode->i_sb;
+ const struct iomap_dio_ops *dio_ops;
bool sync = is_sync_kiocb(iocb);
bool append = false;
ssize_t ret, count;
}
if (append) {
- ret = zonefs_file_dio_append(iocb, from);
+ unsigned int max = bdev_max_zone_append_sectors(sb->s_bdev);
+
+ max = ALIGN_DOWN(max << SECTOR_SHIFT, sb->s_blocksize);
+ iov_iter_truncate(from, max);
+
+ dio_ops = &zonefs_zone_append_dio_ops;
} else {
- /*
- * iomap_dio_rw() may return ENOTBLK if there was an issue with
- * page invalidation. Overwrite that error code with EBUSY to
- * be consistent with zonefs_file_dio_append() return value for
- * similar issues.
- */
- ret = iomap_dio_rw(iocb, from, &zonefs_write_iomap_ops,
- &zonefs_write_dio_ops, 0, NULL, 0);
- if (ret == -ENOTBLK)
- ret = -EBUSY;
+ dio_ops = &zonefs_write_dio_ops;
}
+ /*
+ * iomap_dio_rw() may return ENOTBLK if there was an issue with
+ * page invalidation. Overwrite that error code with EBUSY so that
+ * the user can make sense of the error.
+ */
+ ret = iomap_dio_rw(iocb, from, &zonefs_write_iomap_ops,
+ dio_ops, 0, NULL, 0);
+ if (ret == -ENOTBLK)
+ ret = -EBUSY;
+
if (zonefs_zone_is_seq(z) &&
(ret > 0 || ret == -EIOCBQUEUED)) {
if (ret > 0)
.splice_write = iter_file_splice_write,
.iopoll = iocb_bio_iopoll,
};
+
+int zonefs_file_bioset_init(void)
+{
+ return bioset_init(&zonefs_zone_append_bio_set, BIO_POOL_SIZE,
+ offsetof(struct zonefs_zone_append_bio, bio),
+ BIOSET_NEED_BVECS);
+}
+
+void zonefs_file_bioset_exit(void)
+{
+ bioset_exit(&zonefs_zone_append_bio_set);
+}
projects / platform / kernel / linux-rpi.git / commitdiff