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Mon, 2 Jun 2025 21:41:57 +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 v2 1/2] libtracecmd: Support querying position within a new compressed block Date: Mon, 2 Jun 2025 22:38:32 +0100 Message-ID: <20250602214154.446881-2-iii@linux.ibm.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250602214154.446881-1-iii@linux.ibm.com> References: <20250602214154.446881-1-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-Proofpoint-GUID: cGO2ezf97h06ecrHT1MGVamUg315xLDe X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNjAyMDE3OCBTYWx0ZWRfX7iWMFf1k4dZF nXMm1ah5X5SLpe0HlkUNx03D5RPrOsRC0h8BsnU1Iipu+sV4LloOxkZbAKnAePCWJROXUerlZQV dIFEx9tlXOO9tBQLW93qSSSqEmkhmqzSkU0xswvlmRVz+Gm5rYkXTyszCoIIu2oB6Q9myKGA+1Q pKCH7AYdSjmLjCpTh1AT1S8u0dDoZVtugUZcIXes8Ax2ncTk13XiTrsQ9RyQWJKZKbf5CpGEf4f Qcvd094sacaEbQki73Hrmz8M1jEwdV2mdCknGsRWNvtkrYo9FOKql3MJrwqCCY08YYQKVn5BJd6 NnNyXVKd9t7MUk+I76cSkuuJcelOumthH85QCgxaO4qfRC/4Is7FiHKDnDpvKkrJwjLJCl2E94l rNd7foPiKKelrgq6W7XPiZvxotxB/wrVeiO1ocsCNyjh980Yy6X8RF6K8NeTfPNflriup9Ma X-Proofpoint-ORIG-GUID: cGO2ezf97h06ecrHT1MGVamUg315xLDe X-Authority-Analysis: v=2.4 cv=c+WrQQ9l c=1 sm=1 tr=0 ts=683e1aaa cx=c_pps a=3Bg1Hr4SwmMryq2xdFQyZA==:117 a=3Bg1Hr4SwmMryq2xdFQyZA==:17 a=6IFa9wvqVegA:10 a=VnNF1IyMAAAA:8 a=ttnRCE21zARDvYvolyIA:9 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.0.736,FMLib:17.12.80.40 definitions=2025-06-02_08,2025-06-02_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 spamscore=0 priorityscore=1501 mlxlogscore=970 phishscore=0 adultscore=0 clxscore=1015 lowpriorityscore=0 malwarescore=0 suspectscore=0 bulkscore=0 impostorscore=0 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2505280000 definitions=main-2506020178 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; -- 2.49.0