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Fri, 11 Jul 2025 13:28:04 +0000 (GMT) From: Ilya Leoshkevich To: Steven Rostedt Cc: linux-trace-devel@vger.kernel.org, Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Ilya Leoshkevich Subject: [PATCH v3 1/2] libtracecmd: Support querying position within a new compressed block Date: Fri, 11 Jul 2025 15:25:35 +0200 Message-ID: <20250711132802.1781-2-iii@linux.ibm.com> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250711132802.1781-1-iii@linux.ibm.com> References: <20250711132802.1781-1-iii@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-trace-devel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Authority-Analysis: v=2.4 cv=GL8IEvNK c=1 sm=1 tr=0 ts=68711169 cx=c_pps a=AfN7/Ok6k8XGzOShvHwTGQ==:117 a=AfN7/Ok6k8XGzOShvHwTGQ==:17 a=Wb1JkmetP80A:10 a=VnNF1IyMAAAA:8 a=ttnRCE21zARDvYvolyIA:9 X-Proofpoint-ORIG-GUID: kBQfcA-wf0zu1LgFWYatpkSC4X-78oFc X-Proofpoint-GUID: kBQfcA-wf0zu1LgFWYatpkSC4X-78oFc X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNzExMDA5NCBTYWx0ZWRfX0GMHF8RCko02 AJG5CvaOctfNxzqe0jx/EO81kkDDOBTatH4AUBfxOs/W2GKuOVxTKLfoTvTFadL+e0p6S5NSy9m UZklzSjNnKU8bxuLKcFK3eo/CNdlz/2bWvjJVVp6hgypVpvkzBbvQC+m+/YL622plSPyKdfMlme b+fssR0ULwv53GY5KpqKWi6UdbxIDfoRquVXjXrA1GTiTXVonUrfetNY7m7iAjE8dfgPG1Swdmr Y4CGYDe7s4dlmOM0wcCQNbP3RYb5vM/U8/T3xzJw9oDuEis5e5pKKcyXZdf5kSr7ZcW4a/ai1th zUzmDC+oyGmTuYcTMjzkVjgnjtUh89B/ZK7uMdhjvyXOlxqLGhm9phc3sh/dvUGVnj/QM5Szajs 53qK+bPLY+MZJRrdWo1poSq5hxZNortSPWB40c2ilOLjnIyybt3tpKQn4gWZE+vN4x03+LKj X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.1.7,FMLib:17.12.80.40 definitions=2025-07-11_03,2025-07-09_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 phishscore=0 clxscore=1015 impostorscore=0 suspectscore=0 bulkscore=0 adultscore=0 priorityscore=1501 mlxscore=0 spamscore=0 mlxlogscore=963 lowpriorityscore=0 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2505280000 definitions=main-2507110094 tracecmd_compress_lseek() refuses to return position within a new block, because handle->buffer is NULL. Add support for this; do not implement actually seeking within a new block, because this is not required at the moment. Signed-off-by: Ilya Leoshkevich --- lib/trace-cmd/trace-compress.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/lib/trace-cmd/trace-compress.c b/lib/trace-cmd/trace-compress.c index 2a7a3e24..3e10cf5b 100644 --- a/lib/trace-cmd/trace-compress.c +++ b/lib/trace-cmd/trace-compress.c @@ -132,9 +132,12 @@ off_t tracecmd_compress_lseek(struct tracecmd_compression *handle, off_t offset, { unsigned long p; - if (!handle || !handle->buffer) + if (!handle) return (off_t)-1; + if (!handle->buffer) + return (whence == SEEK_CUR && offset == 0) ? 0 : (off_t)-1; + switch (whence) { case SEEK_CUR: p = handle->pointer + offset; -- 2.50.1