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Message-Id: <20210423230609.13519-1-alx.manpages@gmail.com>
Date: Sat, 24 Apr 2021 01:06:10 +0200
From: Alejandro Colomar <alx.manpages@...il.com>
To: mtk.manpages@...il.com, linux-man@...r.kernel.org
Cc: Alejandro Colomar <alx.manpages@...il.com>,
linux-kernel@...r.kernel.org, libc-alpha@...rceware.org,
gcc-patches@....gnu.org
Subject: [RFC] bpf.2: Use standard types and attributes
Some manual pages are already using C99 syntax for integral
types 'uint32_t', but some aren't. There are some using kernel
syntax '__u32'. Fix those.
Some pages also document attributes, using GNU syntax
'__attribute__((xxx))'. Update those to use the shorter and more
portable C2x syntax, which hasn't been standardized yet, but is
already implemented in GCC, and available through either --std=c2x
or any of the --std=gnu... options.
Signed-off-by: Alejandro Colomar <alx.manpages@...il.com>
---
man2/bpf.2 | 47 +++++++++++++++++++++++------------------------
1 file changed, 23 insertions(+), 24 deletions(-)
diff --git a/man2/bpf.2 b/man2/bpf.2
index 6e1ffa198..204f01bfc 100644
--- a/man2/bpf.2
+++ b/man2/bpf.2
@@ -188,39 +188,38 @@ commands:
.EX
union bpf_attr {
struct { /* Used by BPF_MAP_CREATE */
- __u32 map_type;
- __u32 key_size; /* size of key in bytes */
- __u32 value_size; /* size of value in bytes */
- __u32 max_entries; /* maximum number of entries
- in a map */
+ uint32_t map_type;
+ uint32_t key_size; /* size of key in bytes */
+ uint32_t value_size; /* size of value in bytes */
+ uint32_t max_entries; /* maximum number of entries
+ in a map */
};
- struct { /* Used by BPF_MAP_*_ELEM and BPF_MAP_GET_NEXT_KEY
- commands */
- __u32 map_fd;
- __aligned_u64 key;
+ struct { /* Used by BPF_MAP_*_ELEM and BPF_MAP_GET_NEXT_KEY commands */
+ uint32_t map_fd;
+ uint64_t [[gnu::aligned(8)]] key;
union {
- __aligned_u64 value;
- __aligned_u64 next_key;
+ uint64_t [[gnu::aligned(8)]] value;
+ uint64_t [[gnu::aligned(8)]] next_key;
};
- __u64 flags;
+ uint64_t flags;
};
struct { /* Used by BPF_PROG_LOAD */
- __u32 prog_type;
- __u32 insn_cnt;
- __aligned_u64 insns; /* \(aqconst struct bpf_insn *\(aq */
- __aligned_u64 license; /* \(aqconst char *\(aq */
- __u32 log_level; /* verbosity level of verifier */
- __u32 log_size; /* size of user buffer */
- __aligned_u64 log_buf; /* user supplied \(aqchar *\(aq
- buffer */
- __u32 kern_version;
- /* checked when prog_type=kprobe
- (since Linux 4.1) */
+ uint32_t prog_type;
+ uint32_t insn_cnt;
+ uint64_t [[gnu::aligned(8)]] insns; /* \(aqconst struct bpf_insn *\(aq */
+ uint64_t [[gnu::aligned(8)]] license; /* \(aqconst char *\(aq */
+ uint32_t log_level; /* verbosity level of verifier */
+ uint32_t log_size; /* size of user buffer */
+ uint64_t [[gnu::aligned(8)]] log_buf; /* user supplied \(aqchar *\(aq
+ buffer */
+ uint32_t kern_version;
+ /* checked when prog_type=kprobe
+ (since Linux 4.1) */
.\" commit 2541517c32be2531e0da59dfd7efc1ce844644f5
};
-} __attribute__((aligned(8)));
+} [[gnu::aligned(8)]];
.EE
.in
.\"
--
2.31.0
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