diff options
Diffstat (limited to 'block.c')
| -rw-r--r-- | block.c | 40 |
1 files changed, 40 insertions, 0 deletions
@@ -221,6 +221,7 @@ BlockDriverState *bdrv_new(const char *device_name) if (device_name[0] != '\0') { QTAILQ_INSERT_TAIL(&bdrv_states, bs, list); } + bdrv_iostatus_disable(bs); return bs; } @@ -772,6 +773,7 @@ int bdrv_attach_dev(BlockDriverState *bs, void *dev) return -EBUSY; } bs->dev = dev; + bdrv_iostatus_reset(bs); return 0; } @@ -3183,6 +3185,44 @@ int bdrv_in_use(BlockDriverState *bs) return bs->in_use; } +void bdrv_iostatus_enable(BlockDriverState *bs) +{ + bs->iostatus = BDRV_IOS_OK; +} + +/* The I/O status is only enabled if the drive explicitly + * enables it _and_ the VM is configured to stop on errors */ +bool bdrv_iostatus_is_enabled(const BlockDriverState *bs) +{ + return (bs->iostatus != BDRV_IOS_INVAL && + (bs->on_write_error == BLOCK_ERR_STOP_ENOSPC || + bs->on_write_error == BLOCK_ERR_STOP_ANY || + bs->on_read_error == BLOCK_ERR_STOP_ANY)); +} + +void bdrv_iostatus_disable(BlockDriverState *bs) +{ + bs->iostatus = BDRV_IOS_INVAL; +} + +void bdrv_iostatus_reset(BlockDriverState *bs) +{ + if (bdrv_iostatus_is_enabled(bs)) { + bs->iostatus = BDRV_IOS_OK; + } +} + +/* XXX: Today this is set by device models because it makes the implementation + quite simple. However, the block layer knows about the error, so it's + possible to implement this without device models being involved */ +void bdrv_iostatus_set_err(BlockDriverState *bs, int error) +{ + if (bdrv_iostatus_is_enabled(bs) && bs->iostatus == BDRV_IOS_OK) { + assert(error >= 0); + bs->iostatus = error == ENOSPC ? BDRV_IOS_ENOSPC : BDRV_IOS_FAILED; + } +} + void bdrv_acct_start(BlockDriverState *bs, BlockAcctCookie *cookie, int64_t bytes, enum BlockAcctType type) |