root / lab4 / .minix-src / include / sys / ioc_fbd.h @ 14
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/* sys/ioc_fbd.h - Faulty Block Device ioctl() command codes.
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*
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*/
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#ifndef _S_I_FBD_H
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#define _S_I_FBD_H
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/* FBD rule structure. */
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typedef int fbd_rulenum_t; |
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struct fbd_rule {
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fbd_rulenum_t num; /* rule number (1-based) */
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u64_t start; /* start position of area to match */
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u64_t end; /* end position (exclusive) (0 = up to EOF) */
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int flags; /* match read and/or write requests */ |
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unsigned int skip; /* # matches to skip before activating */ |
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unsigned int count; /* # times left to trigger (0 = no limit) */ |
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int action; /* action type to perform when triggered */ |
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union { /* action parameters */ |
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struct {
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int type; /* corruption type */ |
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} corrupt; |
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struct {
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int code; /* error code to return (OK, EIO..) */ |
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} error; |
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struct {
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u64_t start; /* start position of target area */
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u64_t end; /* end position of area (excl) */
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u32_t align; /* alignment to use in target area */
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} misdir; |
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struct {
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u32_t lead; /* # bytes to process normally */
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} losttorn; |
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} params; |
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}; |
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/* Match flags. */
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#define FBD_FLAG_READ 0x1 /* match read requests */ |
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#define FBD_FLAG_WRITE 0x2 /* match write requests */ |
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/* Action types. */
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enum {
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FBD_ACTION_CORRUPT, /* write or return corrupt data */
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FBD_ACTION_ERROR, /* return an I/O error */
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FBD_ACTION_MISDIR, /* perform a misdirected write */
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FBD_ACTION_LOSTTORN /* perform a lost or torn write */
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}; |
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/* Corruption types. */
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enum {
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FBD_CORRUPT_ZERO, /* write or return ..zeroed data */
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FBD_CORRUPT_PERSIST, /* ..consequently the same bad data */
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FBD_CORRUPT_RANDOM /* ..new random data every time */
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}; |
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/* The I/O control requests. */
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#define FBDCADDRULE _IOW('B', 1, struct fbd_rule) /* add a rule */ |
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#define FBDCDELRULE _IOW('B', 2, fbd_rulenum_t) /* delete a rule */ |
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#define FBDCGETRULE _IOWR('B', 3, struct fbd_rule) /* retrieve a rule */ |
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#endif /* _S_I_FBD_H */ |