Commit e40fbbf0 authored by Usama Arif's avatar Usama Arif Committed by Andrii Nakryiko

uapi/bpf: Add missing description and returns for helper documentation

Both description and returns section will become mandatory
for helpers and syscalls in a later commit to generate man pages.

This commit also adds in the documentation that BPF_PROG_RUN is
an alias for BPF_PROG_TEST_RUN for anyone searching for the
syscall in the generated man pages.
Signed-off-by: default avatarUsama Arif <usama.arif@bytedance.com>
Signed-off-by: default avatarAndrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20220119114442.1452088-1-usama.arif@bytedance.com
parent b662000a
......@@ -330,6 +330,8 @@ union bpf_iter_link_info {
* *ctx_out*, *data_in* and *data_out* must be NULL.
* *repeat* must be zero.
*
* BPF_PROG_RUN is an alias for BPF_PROG_TEST_RUN.
*
* Return
* Returns zero on success. On error, -1 is returned and *errno*
* is set appropriately.
......@@ -1775,6 +1777,8 @@ union bpf_attr {
* 0 on success, or a negative error in case of failure.
*
* u64 bpf_get_current_pid_tgid(void)
* Description
* Get the current pid and tgid.
* Return
* A 64-bit integer containing the current tgid and pid, and
* created as such:
......@@ -1782,6 +1786,8 @@ union bpf_attr {
* *current_task*\ **->pid**.
*
* u64 bpf_get_current_uid_gid(void)
* Description
* Get the current uid and gid.
* Return
* A 64-bit integer containing the current GID and UID, and
* created as such: *current_gid* **<< 32 \|** *current_uid*.
......@@ -2256,6 +2262,8 @@ union bpf_attr {
* The 32-bit hash.
*
* u64 bpf_get_current_task(void)
* Description
* Get the current task.
* Return
* A pointer to the current task struct.
*
......@@ -2369,6 +2377,8 @@ union bpf_attr {
* indicate that the hash is outdated and to trigger a
* recalculation the next time the kernel tries to access this
* hash or when the **bpf_get_hash_recalc**\ () helper is called.
* Return
* void.
*
* long bpf_get_numa_node_id(void)
* Description
......@@ -2466,6 +2476,8 @@ union bpf_attr {
* A 8-byte long unique number or 0 if *sk* is NULL.
*
* u32 bpf_get_socket_uid(struct sk_buff *skb)
* Description
* Get the owner UID of the socked associated to *skb*.
* Return
* The owner UID of the socket associated to *skb*. If the socket
* is **NULL**, or if it is not a full socket (i.e. if it is a
......@@ -3240,6 +3252,9 @@ union bpf_attr {
* The id is returned or 0 in case the id could not be retrieved.
*
* u64 bpf_get_current_cgroup_id(void)
* Description
* Get the current cgroup id based on the cgroup within which
* the current task is running.
* Return
* A 64-bit integer containing the current cgroup id based
* on the cgroup within which the current task is running.
......
......@@ -330,6 +330,8 @@ union bpf_iter_link_info {
* *ctx_out*, *data_in* and *data_out* must be NULL.
* *repeat* must be zero.
*
* BPF_PROG_RUN is an alias for BPF_PROG_TEST_RUN.
*
* Return
* Returns zero on success. On error, -1 is returned and *errno*
* is set appropriately.
......@@ -1775,6 +1777,8 @@ union bpf_attr {
* 0 on success, or a negative error in case of failure.
*
* u64 bpf_get_current_pid_tgid(void)
* Description
* Get the current pid and tgid.
* Return
* A 64-bit integer containing the current tgid and pid, and
* created as such:
......@@ -1782,6 +1786,8 @@ union bpf_attr {
* *current_task*\ **->pid**.
*
* u64 bpf_get_current_uid_gid(void)
* Description
* Get the current uid and gid.
* Return
* A 64-bit integer containing the current GID and UID, and
* created as such: *current_gid* **<< 32 \|** *current_uid*.
......@@ -2256,6 +2262,8 @@ union bpf_attr {
* The 32-bit hash.
*
* u64 bpf_get_current_task(void)
* Description
* Get the current task.
* Return
* A pointer to the current task struct.
*
......@@ -2369,6 +2377,8 @@ union bpf_attr {
* indicate that the hash is outdated and to trigger a
* recalculation the next time the kernel tries to access this
* hash or when the **bpf_get_hash_recalc**\ () helper is called.
* Return
* void.
*
* long bpf_get_numa_node_id(void)
* Description
......@@ -2466,6 +2476,8 @@ union bpf_attr {
* A 8-byte long unique number or 0 if *sk* is NULL.
*
* u32 bpf_get_socket_uid(struct sk_buff *skb)
* Description
* Get the owner UID of the socked associated to *skb*.
* Return
* The owner UID of the socket associated to *skb*. If the socket
* is **NULL**, or if it is not a full socket (i.e. if it is a
......@@ -3240,6 +3252,9 @@ union bpf_attr {
* The id is returned or 0 in case the id could not be retrieved.
*
* u64 bpf_get_current_cgroup_id(void)
* Description
* Get the current cgroup id based on the cgroup within which
* the current task is running.
* Return
* A 64-bit integer containing the current cgroup id based
* on the cgroup within which the current task is running.
......
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