diff options
| author | Kent Overstreet <kent.overstreet@linux.dev> | 2022-11-19 18:59:55 -0500 |
|---|---|---|
| committer | Kent Overstreet <kent.overstreet@linux.dev> | 2022-11-19 18:59:55 -0500 |
| commit | 36db254cec55f7fededa8fb038082ac8de7129a6 (patch) | |
| tree | d6bcb9b334478c7f2e8212d36094f9cc1746f44d | |
| parent | 7e196f5399706a411c210169d2e73000a4fd605a (diff) | |
linux/blkdev.c: Fall back to buffered IO when O_DIRECT fails
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
| -rw-r--r-- | linux/blkdev.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/linux/blkdev.c b/linux/blkdev.c index 9b3ea93f..54cd6e9c 100644 --- a/linux/blkdev.c +++ b/linux/blkdev.c @@ -180,13 +180,26 @@ struct block_device *blkdev_get_by_path(const char *path, fmode_t mode, if (mode & FMODE_EXCL) flags |= O_EXCL; #endif + buffered_fd = open(path, flags); + if (buffered_fd < 0) + return ERR_PTR(-errno); fd = open(path, flags|O_DIRECT); if (fd < 0) + fd = dup(buffered_fd); + if (fd < 0) { + close(buffered_fd); return ERR_PTR(-errno); + } - sync_fd = xopen(path, flags|O_DIRECT|O_SYNC); - buffered_fd = xopen(path, flags); + sync_fd = open(path, flags|O_DIRECT|O_SYNC); + if (sync_fd < 0) + sync_fd = open(path, flags|O_SYNC); + if (sync_fd < 0) { + close(fd); + close(buffered_fd); + return ERR_PTR(-errno); + } bdev = malloc(sizeof(*bdev)); memset(bdev, 0, sizeof(*bdev)); |