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path: root/cooker/match.c
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* cooker/match: Fix mask calculation for GNU_DEV_MINORStefano Brivio2023-06-271-2/+2
| | | | | | | | Starting from Linux 2.6 series, we have 20 bits of minor (not 32) and the gap between low and high bits is 12 bits, meaning the high ones are shifted by 20 (not 12). Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* cooker: Support for read(), OP_STORE, field-based filtersStefano Brivio2023-06-141-3/+2
| | | | Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* cooker: Pass arguments to filterStefano Brivio2023-06-091-4/+15
| | | | Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* cooker: Full support for flags and masks, assorted fixesStefano Brivio2023-06-081-12/+49
| | | | Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* mknod/mknodat values, initial support for MASK flag, OP_BITWISEStefano Brivio2023-06-071-13/+31
| | | | Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* seitan,cooker: op_resolvefdAlice Frosi2023-06-071-1/+12
| | | | | | | | | ops: - update resolvefd with the description - add debug prints cooker: - add emit_resolvefd when match has type FDPATH
* cooker: Draft quality: mknod/mknodat, sets of values with "in"Stefano Brivio2023-06-061-8/+65
| | | | | | | | While at it: - directly assign 'fd' in eater from install_filter() - turn op_cmp into a description-style thing Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* cooker: use unsigned short for family with connectAlice Frosi2023-06-051-0/+1
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* treewide: Change to GPLv2, add LICENSES, missing headersStefano Brivio2023-06-041-1/+1
| | | | | | As discussed with Alice -- 'reuse lint' passes now. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* cooker, seitan: OP_CALL arguments and contextStefano Brivio2023-06-021-32/+3
| | | | Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* cooker: OP_CALL and OP_COPY stuffStefano Brivio2023-06-011-165/+96
| | | | | | ...mostly. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* cooker, seitan: Now with 100% more glutenStefano Brivio2023-05-161-0/+361
Pseudorandom changes and progress around cooker and seitan: - cooker: - rename matching functions, split match.c - fix up SELECT semantics - add some form of handling for all syscalls in the example (some stubs) - OP_CMP for all basic and compound types except for flags - link jumps to next block and next match - completed implementation of tags - gluten write - filter clean-ups, write filters (probably not working) - seitan: - load gluten and source instructions and data from there $ ./seitan-cooker cooker/example.hjson example.gluten example.bpf Parsing block 0 Parsing match 0: connect Found description for connect 0: OP_NR: if syscall number is not 0, jump to next block Parsing match argument fd setting tag reference 'fd' tag 'fd' now refers to seccomp data at 0 Parsing match argument addr allocating 128 at offset 0 1: OP_LOAD: #0 < args[1] (size: 128) C#0: (INT) 1 2: OP_CMP: if temporary data: #0 NE (size: 4) read-only data: #0, jump to next block C#4: (STRING:24) /var/run/pr-helper.sock 3: OP_CMP: if temporary data: #0 NE (size: 24) read-only data: #4, jump to next block Linking match... Linking block... linked jump of instruction #0 to #4 linked jump of instruction #2 to #4 linked jump of instruction #3 to #4 Parsing block 1 Parsing match 0: ioctl Found description for ioctl 4: OP_NR: if syscall number is not 112, jump to next block Parsing match argument path Parsing match argument request C#28: (INT) 1074025674 5: OP_CMP: if seccomp data: #1 NE (size: 4) read-only data: #28, jump to next block Parsing match argument ifr allocating 40 at offset 128 6: OP_LOAD: #128 < args[2] (size: 40) C#32: (STRING:5) tap0 7: OP_CMP: if temporary data: #128 NE (size: 5) read-only data: #32, jump to next block C#37: (INT) 1 8: OP_CMP: if temporary data: #128 NE (size: 4) read-only data: #37, jump to next block Linking match... Linking block... linked jump of instruction #4 to #9 linked jump of instruction #5 to #9 linked jump of instruction #7 to #9 linked jump of instruction #8 to #9 Parsing block 2 Parsing match 0: unshare Found description for unshare 9: OP_NR: if syscall number is not 164, jump to next block Parsing match argument flags Linking match... Linking block... linked jump of instruction #9 to #10 Parsing block 3 Parsing match 0: unshare Found description for unshare 10: OP_NR: if syscall number is not 164, jump to next block Parsing match argument flags Linking match... Linking block... linked jump of instruction #10 to #11 Parsing block 4 Parsing match 0: mknod Found description for mknod 11: OP_NR: if syscall number is not 164, jump to next block Parsing match argument path allocating 1 at offset 168 12: OP_LOAD: #168 < args[0] (size: 1) setting tag reference 'path' tag 'path' now refers to temporary data at 168 Parsing match argument mode Parsing match argument major Parsing match argument minor setting tag reference 'minor' tag 'minor' now refers to seccomp data at 2 Linking match... Linking block... linked jump of instruction #11 to #13 Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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