Datasets locking/v3 #12216
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Datasets locking/v3 #12216
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In a recent warning reported by scan-build, datasets were found to be
using a blocking call in a critical section.
datasets.c:187:12: warning: Call to blocking function 'fgets' inside of critical section [unix.BlockInCriticalSection]
187 | while (fgets(line, (int)sizeof(line), fp) != NULL) {
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
datasets.c:292:12: warning: Call to blocking function 'fgets' inside of critical section [unix.BlockInCriticalSection]
292 | while (fgets(line, (int)sizeof(line), fp) != NULL) {
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
datasets.c:368:12: warning: Call to blocking function 'fgets' inside of critical section [unix.BlockInCriticalSection]
368 | while (fgets(line, (int)sizeof(line), fp) != NULL) {
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
datasets.c:442:12: warning: Call to blocking function 'fgets' inside of critical section [unix.BlockInCriticalSection]
442 | while (fgets(line, (int)sizeof(line), fp) != NULL) {
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
datasets.c:512:12: warning: Call to blocking function 'fgets' inside of critical section [unix.BlockInCriticalSection]
512 | while (fgets(line, (int)sizeof(line), fp) != NULL) {
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5 warnings generated.
These calls are blocking in the multi tenant mode where several tenants
may be trying to load the same dataset in parallel.
In a single tenant mode, this operation is performed as a part of a
single thread before the engine startup.
In order to evade the warning and simplify the code, the initial file
reading is moved to Rust with this commit with a much simpler handling
of dataset and datarep.
Bug 7398
inashivb
commented
Dec 4, 2024
| let filename = Path::new(file_string); | ||
| // SCLogNotice!("Path: {:?}", filename); | ||
| if let Ok(lines) = read_lines(filename, mode) { | ||
| for line in lines.flatten() { |
There was a problem hiding this comment.
Also, something is going off here when the file is opened in append mode.
Edit: It's really bad. There's an infinite loop during the flatten call. Debugging..
|
Information: ERROR: QA failed on SURI_TLPR1_alerts_cmp.
Pipeline 23718 |
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Link to ticket: https://redmine.openinfosecfoundation.org/issues/7398
Previous PR: #12182
Changes since v2:
Note: This is NOT the exact replication of the code in master yet. Not sure how to move/use macros in Rust which are like
FatalErrorOnInitthat use atomic vars on C side.