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bpf: add trace logging

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Very helpful when trying to figure out what exactly is going on.
This commit is contained in:
Zbigniew Jędrzejewski-Szmek 2019-11-09 12:34:30 +01:00
parent 4140351189
commit 786cce0099
1 changed files with 8 additions and 0 deletions
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8
src/core/bpf-devices.c
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@ -44,6 +44,8 @@ static int bpf_prog_whitelist_device(BPFProgram *prog, int type, int major, int
assert(prog);
assert(acc);
log_trace("%s: %c %d:%d %s", __func__, type, major, minor, acc);
access = bpf_access_type(acc);
if (access <= 0)
return -EINVAL;
@ -71,6 +73,8 @@ static int bpf_prog_whitelist_major(BPFProgram *prog, int type, int major, const
assert(prog);
assert(acc);
log_trace("%s: %c %d:* %s", __func__, type, major, acc);
access = bpf_access_type(acc);
if (access <= 0)
return -EINVAL;
@ -97,6 +101,8 @@ static int bpf_prog_whitelist_class(BPFProgram *prog, int type, const char *acc)
assert(prog);
assert(acc);
log_trace("%s: %c *:* %s", __func__, type, acc);
access = bpf_access_type(acc);
if (access <= 0)
return -EINVAL;
@ -323,6 +329,8 @@ int bpf_devices_whitelist_device(BPFProgram *prog, const char *path, const char
assert(acc);
assert(strlen(acc) <= 3);
log_trace("%s: %s %s", __func__, node, acc);
/* Some special handling for /dev/block/%u:%u, /dev/char/%u:%u, /run/systemd/inaccessible/chr and
* /run/systemd/inaccessible/blk paths. Instead of stat()ing these we parse out the major/minor directly. This
* means clients can use these path without the device node actually around */