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783ef37213
The code of the old manual reset couldn't handle the case of the drive changing its filename, i.e. "/dev/sdb" becomes "/dev/sdc" after the drive is unplugged and plugged back. Not only this is a bug, in the rare case the user is testing multiple drives at the same time, this would lead to bad behavior.
93 lines
2.2 KiB
C
93 lines
2.2 KiB
C
#ifndef HEADER_LIBDEVS_H
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#define HEADER_LIBDEVS_H
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#include <stdint.h>
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/*
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* Device model
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*/
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enum fake_type {
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/* Device is good. */
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FKTY_GOOD,
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/* Device is at least partially damaged. */
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FKTY_BAD,
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/* Device discards data after a given limit. */
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FKTY_LIMBO,
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/* Device overwrites data after a given limit. */
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FKTY_WRAPAROUND,
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/* Device is a sequence of wraparound and limbo regions. */
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FKTY_CHAIN,
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FKTY_MAX
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};
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const char *fake_type_to_name(enum fake_type fake_type);
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int dev_param_valid(uint64_t real_size_byte,
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uint64_t announced_size_byte, int wrap, int block_order);
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enum fake_type dev_param_to_type(uint64_t real_size_byte,
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uint64_t announced_size_byte, int wrap, int block_order);
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/*
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* Abstract device
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*/
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struct device;
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/* Properties. */
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uint64_t dev_get_size_byte(struct device *dev);
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int dev_get_block_order(struct device *dev);
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int dev_get_block_size(struct device *dev);
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/* Methods. */
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int dev_read_block(struct device *dev, char *buf, uint64_t block);
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int dev_write_block(struct device *dev, const char *buf, uint64_t block);
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int dev_reset(struct device *dev);
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void free_device(struct device *dev);
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static inline int dev_write_and_reset(struct device *dev, const char *buf,
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uint64_t block)
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{
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int rc = dev_write_block(dev, buf, block);
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return rc ? rc : dev_reset(dev);
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}
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/*
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* Concrete devices
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*/
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struct device *create_file_device(const char *filename,
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uint64_t real_size_byte, uint64_t fake_size_byte, int wrap,
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int block_order, int keep_file);
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/* XXX Add support for block devices backed by SCSI and ATA. */
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enum reset_type {
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RT_MANUAL_USB = 0,
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RT_USB,
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RT_MAX
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};
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#define RT_DEFAULT RT_MANUAL_USB
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struct device *create_block_device(const char *filename, enum reset_type rt);
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struct device *create_perf_device(struct device *dev);
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void perf_device_sample(struct device *dev,
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uint64_t *pread_count, uint64_t *pread_time_us,
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uint64_t *pwrite_count, uint64_t *pwrite_time_us,
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uint64_t *preset_count, uint64_t *preset_time_us);
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/* Detach the shadow device of @pdev, free @pdev, and return
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* the shadow device.
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*/
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struct device *pdev_detach_and_free(struct device *dev);
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struct device *create_safe_device(struct device *dev, int max_blocks,
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int min_memory);
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#endif /* HEADER_LIBDEVS_H */
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