diff options
| author | Paul Buetow <paul@buetow.org> | 2026-05-31 19:09:16 +0300 |
|---|---|---|
| committer | Paul Buetow <paul@buetow.org> | 2026-05-31 19:09:16 +0300 |
| commit | 8a1bf6236f6a525881c647fd881093b393436411 (patch) | |
| tree | 0fb537b847b6e5c72d2d3d98d7ce8fbc15330102 /docs | |
| parent | c3177bd82c16429c1bb246d19af76012479f0c01 (diff) | |
listxattrat: READ-classify return for xattr-list family consistency
listxattrat(2) (Linux 6.13+) returns the size in bytes of the list of
extended attribute names, exactly like listxattr/llistxattr/flistxattr,
but its exit was classified UNCLASSIFIED, so its read bytes were dropped
from I/O totals. Classify it as ReadClassified and regenerate the BPF
handler (ret_type now READ_CLASSIFIED). This mirrors the getxattrat fix
(task ku, commit c3177bd) and completes xattr-family consistency:
get-family and list-family are READ_CLASSIFIED while set-family and
remove-family stay UNCLASSIFIED (they return 0/-1).
Update the docs ReadClassified list and the retclassify expectation, and
add an ioworkload scenario plus integration test: the workload sets a
user xattr then lists names via the raw listxattrat(2) syscall with
AT_FDCWD, and the test asserts enter_listxattrat captures the file path
and accounts the returned name-list size as read bytes.
Task: r20
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/syscall-tracing-plan.md | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/docs/syscall-tracing-plan.md b/docs/syscall-tracing-plan.md index 8cca6fd..71890ae 100644 --- a/docs/syscall-tracing-plan.md +++ b/docs/syscall-tracing-plan.md @@ -92,7 +92,7 @@ sudo ./ior -trace-syscalls openat,recvmsg,nanosleep -no-trace-kinds null Payload bytes classified by return value: -- ReadClassified: `fgetxattr`, `flistxattr`, `getdents`, `getdents64`, `getrandom`, `getxattr`, `getxattrat`, `lgetxattr`, `listxattr`, `llistxattr`, `mq_timedreceive`, `msgrcv`, `pread64`, `preadv`, `preadv2`, `process_vm_readv`, `read`, `readlink`, `readlinkat`, `readv`, `recvfrom`, `recvmsg`, `syslog` +- ReadClassified: `fgetxattr`, `flistxattr`, `getdents`, `getdents64`, `getrandom`, `getxattr`, `getxattrat`, `lgetxattr`, `listxattr`, `listxattrat`, `llistxattr`, `mq_timedreceive`, `msgrcv`, `pread64`, `preadv`, `preadv2`, `process_vm_readv`, `read`, `readlink`, `readlinkat`, `readv`, `recvfrom`, `recvmsg`, `syslog` - TransferClassified: `copy_file_range`, `sendfile64`, `splice`, `tee`, `vmsplice` - WriteClassified: `mq_timedsend`, `msgsnd`, `process_vm_writev`, `pwrite64`, `pwritev`, `pwritev2`, `sendmsg`, `sendto`, `write`, `writev` |