[PATCH] fanotify: Document FAN_AUDIT flag

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Document FAN_AUDIT and related FAN_ENABLE_AUDIT flags.

Signed-off-by: Jan Kara <jack@xxxxxxx>
---
 man2/fanotify_init.2 | 7 +++++++
 man7/fanotify.7      | 9 ++++++++-
 2 files changed, 15 insertions(+), 1 deletion(-)

OK, here's my attempt to document the FAN_AUDIT flag. It would be nice if
Steve glanced over it from the audit side to check things are sane.

diff --git a/man2/fanotify_init.2 b/man2/fanotify_init.2
index ca03b11dc98a..6becc7a680db 100644
--- a/man2/fanotify_init.2
+++ b/man2/fanotify_init.2
@@ -155,6 +155,13 @@ supplied to
 (see
 .BR fanotify (7)).
 .TP
+.BR FAN_ENABLE_AUDIT " (since Linux 4.15)"
+.\" commit de8cd83e91bc3ee212b3e6ec6e4283af9e4ab269
+Enable generation of audit log records about access mediation performed by
+permission events. The permission event response has to be marked with
+.B FAN_AUDIT
+flag for audit log record to be generated.
+.TP
 .BR FAN_REPORT_FID " (since Linux 5.1)"
 .\" commit a8b13aa20afb69161b5123b4f1acc7ea0a03d360
 This value allows the receipt of events which contain additional information
diff --git a/man7/fanotify.7 b/man7/fanotify.7
index 5804a1f30d6c..b5f096304cf4 100644
--- a/man7/fanotify.7
+++ b/man7/fanotify.7
@@ -588,7 +588,14 @@ to deny the file operation.
 .PP
 If access is denied, the requesting application call will receive an
 .BR EPERM
-error.
+error. Additionally, if the notification group has been created with
+.B FAN_ENABLE_AUDIT
+flag,
+.B FAN_AUDIT
+flag can be set in the
+.I response
+field. In that case audit subsystem will log information about the access
+decision to the audit logs.
 .\"
 .SS Closing the fanotify file descriptor
 When all file descriptors referring to the fanotify notification group are
-- 
2.16.4




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