Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
53 lines
1.1 KiB
C
53 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include "tracepoint.h"
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/param.h>
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#include <unistd.h>
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#include <api/fs/tracing_path.h>
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#include "fncache.h"
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int tp_event_has_id(const char *dir_path, struct dirent *evt_dir)
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{
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char evt_path[MAXPATHLEN];
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int fd;
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snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path, evt_dir->d_name);
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fd = open(evt_path, O_RDONLY);
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if (fd < 0)
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return -EINVAL;
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close(fd);
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return 0;
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}
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/*
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* Check whether event is in <debugfs_mount_point>/tracing/events
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*/
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bool is_valid_tracepoint(const char *event_string)
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{
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char *dst, *path = malloc(strlen(event_string) + 4); /* Space for "/id\0". */
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bool have_file = false; /* Conservatively return false if memory allocation failed. */
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const char *src;
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if (!path)
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return false;
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/* Copy event_string replacing the ':' with '/'. */
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for (src = event_string, dst = path; *src; src++, dst++)
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*dst = (*src == ':') ? '/' : *src;
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/* Add "/id\0". */
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memcpy(dst, "/id", 4);
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dst = get_events_file(path);
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if (dst)
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have_file = file_available(dst);
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free(dst);
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free(path);
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return have_file;
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}
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