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cgroup-util: add helpers for opening cgroup by id

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This commit is contained in:
Lennart Poettering
2024-04-06 16:08:23 +02:00
parent cb1b813f0d
commit 3b2874952f
5 changed files with 109 additions and 13 deletions
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src/basic/cgroup-util.h
+10 -1
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@@ -180,6 +180,9 @@ typedef enum CGroupUnified {
* generate paths with multiple adjacent / removed.
*/
int cg_path_open(const char *controller, const char *path);
int cg_cgroupid_open(int fsfd, uint64_t id);
int cg_enumerate_processes(const char *controller, const char *path, FILE **ret);
int cg_read_pid(FILE *f, pid_t *ret);
int cg_read_pidref(FILE *f, PidRef *ret);
@@ -267,6 +270,7 @@ int cg_is_empty_recursive(const char *controller, const char *path);
int cg_get_root_path(char **path);
int cg_path_get_cgroupid(const char *path, uint64_t *ret);
int cg_fd_get_cgroupid(int fd, uint64_t *ret);
int cg_path_get_session(const char *path, char **ret_session);
int cg_path_get_owner_uid(const char *path, uid_t *ret_uid);
int cg_path_get_unit(const char *path, char **ret_unit);
@@ -352,5 +356,10 @@ typedef union {
uint8_t space[offsetof(struct file_handle, f_handle) + sizeof(uint64_t)];
} cg_file_handle;
#define CG_FILE_HANDLE_INIT { .file_handle.handle_bytes = sizeof(uint64_t) }
#define CG_FILE_HANDLE_INIT \
(cg_file_handle) { \
.file_handle.handle_bytes = sizeof(uint64_t), \
.file_handle.handle_type = FILEID_KERNFS, \
}
#define CG_FILE_HANDLE_CGROUPID(fh) (*(uint64_t*) (fh).file_handle.f_handle)