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| author | Paul Buetow <paul@buetow.org> | 2026-05-31 19:04:44 +0300 |
|---|---|---|
| committer | Paul Buetow <paul@buetow.org> | 2026-05-31 19:04:44 +0300 |
| commit | c3177bd82c16429c1bb246d19af76012479f0c01 (patch) | |
| tree | f71fc68ce009295690a723b49881eed74bae0c48 /docs/syscall-tracing-plan.md | |
| parent | c6a89452bd6872a380d4ce0dc9ec35ea0c66ef9e (diff) | |
getxattrat: READ-classify return for xattr-get family consistency
getxattrat(2) (Linux 6.13+) returns the xattr value size in bytes,
exactly like getxattr/lgetxattr/fgetxattr, 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). Path extraction (args[1], after the dirfd) and the
name-not-captured-as-path behaviour were already correct.
Update the docs ReadClassified list and the retclassify expectation,
and add the first xattr integration coverage: an ioworkload scenario
that sets then getxattrat-reads a user xattr on tmpfs, plus a test that
asserts enter_getxattrat captures the file path (not the xattr name)
and accounts the returned value size as read bytes.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Diffstat (limited to 'docs/syscall-tracing-plan.md')
| -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 9d36d8a..8cca6fd 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`, `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`, `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` |