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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */#ifndef _UAPI_LINUX_WATCH_QUEUE_H#define _UAPI_LINUX_WATCH_QUEUE_H
#include <linux/types.h>#include <linux/fcntl.h>#include <linux/ioctl.h>
#define O_NOTIFICATION_PIPE O_EXCL /* Parameter to pipe2() selecting notification pipe */
#define IOC_WATCH_QUEUE_SET_SIZE _IO('W', 0x60) /* Set the size in pages */#define IOC_WATCH_QUEUE_SET_FILTER _IO('W', 0x61) /* Set the filter */
enum watch_notification_type { WATCH_TYPE_META = 0, /* Special record */ WATCH_TYPE_KEY_NOTIFY = 1, /* Key change event notification */ WATCH_TYPE__NR = 2};
enum watch_meta_notification_subtype { WATCH_META_REMOVAL_NOTIFICATION = 0, /* Watched object was removed */ WATCH_META_LOSS_NOTIFICATION = 1, /* Data loss occurred */};
/* * Notification record header. This is aligned to 64-bits so that subclasses * can contain __u64 fields. */struct watch_notification { __u32 type:24; /* enum watch_notification_type */ __u32 subtype:8; /* Type-specific subtype (filterable) */ __u32 info;#define WATCH_INFO_LENGTH 0x0000007f /* Length of record */#define WATCH_INFO_LENGTH__SHIFT 0#define WATCH_INFO_ID 0x0000ff00 /* ID of watchpoint */#define WATCH_INFO_ID__SHIFT 8#define WATCH_INFO_TYPE_INFO 0xffff0000 /* Type-specific info */#define WATCH_INFO_TYPE_INFO__SHIFT 16#define WATCH_INFO_FLAG_0 0x00010000 /* Type-specific info, flag bit 0 */#define WATCH_INFO_FLAG_1 0x00020000 /* ... */#define WATCH_INFO_FLAG_2 0x00040000#define WATCH_INFO_FLAG_3 0x00080000#define WATCH_INFO_FLAG_4 0x00100000#define WATCH_INFO_FLAG_5 0x00200000#define WATCH_INFO_FLAG_6 0x00400000#define WATCH_INFO_FLAG_7 0x00800000};
/* * Notification filtering rules (IOC_WATCH_QUEUE_SET_FILTER). */struct watch_notification_type_filter { __u32 type; /* Type to apply filter to */ __u32 info_filter; /* Filter on watch_notification::info */ __u32 info_mask; /* Mask of relevant bits in info_filter */ __u32 subtype_filter[8]; /* Bitmask of subtypes to filter on */};
struct watch_notification_filter { __u32 nr_filters; /* Number of filters */ __u32 __reserved; /* Must be 0 */ struct watch_notification_type_filter filters[];};
/* * Extended watch removal notification. This is used optionally if the type * wants to indicate an identifier for the object being watched, if there is * such. This can be distinguished by the length. * * type -> WATCH_TYPE_META * subtype -> WATCH_META_REMOVAL_NOTIFICATION */struct watch_notification_removal { struct watch_notification watch; __u64 id; /* Type-dependent identifier */};
/* * Type of key/keyring change notification. */enum key_notification_subtype { NOTIFY_KEY_INSTANTIATED = 0, /* Key was instantiated (aux is error code) */ NOTIFY_KEY_UPDATED = 1, /* Key was updated */ NOTIFY_KEY_LINKED = 2, /* Key (aux) was added to watched keyring */ NOTIFY_KEY_UNLINKED = 3, /* Key (aux) was removed from watched keyring */ NOTIFY_KEY_CLEARED = 4, /* Keyring was cleared */ NOTIFY_KEY_REVOKED = 5, /* Key was revoked */ NOTIFY_KEY_INVALIDATED = 6, /* Key was invalidated */ NOTIFY_KEY_SETATTR = 7, /* Key's attributes got changed */};
/* * Key/keyring notification record. * - watch.type = WATCH_TYPE_KEY_NOTIFY * - watch.subtype = enum key_notification_type */struct key_notification { struct watch_notification watch; __u32 key_id; /* The key/keyring affected */ __u32 aux; /* Per-type auxiliary data */};
#endif /* _UAPI_LINUX_WATCH_QUEUE_H */