diff options
Diffstat (limited to 'sys/kern/kern_disk.c')
| -rw-r--r-- | sys/kern/kern_disk.c | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/sys/kern/kern_disk.c b/sys/kern/kern_disk.c index b956c02..5c09c81 100644 --- a/sys/kern/kern_disk.c +++ b/sys/kern/kern_disk.c @@ -171,6 +171,10 @@ __disk_get_id(diskid_t id) * @buf: Buffer to read data into * @len: Number of bytes to read * @write: If true, do a write + * + * XXX: The size in which blocks are read at is in + * virtual blocks which is defined by V_BSIZE + * in sys/disk.h */ static ssize_t disk_rw(diskid_t id, blkoff_t blk, void *buf, size_t len, bool write) @@ -180,6 +184,8 @@ disk_rw(diskid_t id, blkoff_t blk, void *buf, size_t len, bool write) struct disk *dp; int error; + len = ALIGN_UP(len, V_BSIZE); + /* Attempt to grab the disk object */ error = disk_get_id(id, &dp); if (error < 0) { @@ -268,6 +274,15 @@ disk_add(const char *name, dev_t dev, const struct bdevsw *bdev, int flags) dp->id = disk_count++; dp->bsize = DEFAULT_BSIZE; + /* + * We are to panic if the virtual blocksize + * defined is not a multiple of any hardware + * block size + */ + if ((V_BSIZE & (dp->bsize - 1)) != 0) { + panic("virtual block size not hw bsize aligned\n"); + } + /* Now we can add it to the queue */ spinlock_acquire(&diskq_lock); TAILQ_INSERT_TAIL(&diskq, dp, link); @@ -343,9 +358,9 @@ disk_buf_alloc(diskid_t id, size_t len) /* * Here we will align the buffer size by the - * disk's block size to ensure it is big enough. + * virtual block size to ensure it is big enough. */ - len = ALIGN_UP(len, dp->bsize); + len = ALIGN_UP(len, V_BSIZE); buf = dynalloc(len); return buf; } |