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REPLY(-4.00)[]; BAYES_HAM(-3.00)[99.99%]; NEURAL_HAM_LONG(-1.00)[-1.000]; MID_RHS_NOT_FQDN(0.50)[]; HAS_REPLYTO(0.30)[pvorel@suse.cz]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; ARC_NA(0.00)[]; TO_DN_SOME(0.00)[]; MIME_TRACE(0.00)[0:+]; FUZZY_RATELIMITED(0.00)[rspamd.com]; RCVD_VIA_SMTP_AUTH(0.00)[]; MISSING_XM_UA(0.00)[]; RCVD_TLS_ALL(0.00)[]; RCPT_COUNT_THREE(0.00)[3]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; DKIM_SIGNED(0.00)[suse.cz:s=susede2_rsa,suse.cz:s=susede2_ed25519]; DBL_BLOCKED_OPENRESOLVER(0.00)[imap1.dmz-prg2.suse.org:helo]; RCVD_COUNT_TWO(0.00)[2]; TO_MATCH_ENVRCPT_ALL(0.00)[]; REPLYTO_EQ_FROM(0.00)[] X-Virus-Scanned: clamav-milter 1.0.9 at in-7.smtp.seeweb.it X-Virus-Status: Clean Subject: Re: [LTP] [PATCH 2/2] Add test for fanotify monitoring of tracing filesystem X-BeenThere: ltp@lists.linux.it X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux Test Project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Petr Vorel Cc: ppavlu@suse.cz, ltp@lists.linux.it Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ltp-bounces+ltp=archiver.kernel.org@lists.linux.it Sender: "ltp" > Hi! > On 2/24/26 14:40, Petr Vorel wrote: > > > +static void setup(void) > > > +{ > > > + if (tst_fs_type(MNTPOINT) != TST_TRACEFS_MAGIC) { > > > + SAFE_MOUNT("tracefs", MNTPOINT, "tracefs", > > > + MS_NODEV | MS_NOEXEC | MS_NOSUID, NULL); > > I see possible mounting is the reason... > > > + unmount_needed = 1; > > > + } > > > + > > > + if (access(EVENTS_SYSFILE, F_OK)) > > > + tst_brk(TCONF, "Kprobe events not supported by kernel"); > > ... why we cannot check /sys/kernel/tracing/kprobe_events presence via > > .save_restore. > Well, yes, tracefs may need to be mounted during test setup. But > .save_restore also assumes that sysfiles contain only one line while > kprobe_events may hold arbitrarily long kprobe list. Also note that the > restore function opens the sysfile with O_TRUNC, which might wipe all > existing kprobes before creating them again. Therefore I've decided to check > the file availability in setup() and send a targeted kprobe delete command > instead of saving and restoring the whole sysfile. Makes sense. Thanks for info. Kind regards, Petr -- Mailing list info: https://lists.linux.it/listinfo/ltp