git: 099a81a4173b - main - linprocfs: Add support for proc/sysvipc/{msg,sem,shm}
Date: Sat, 11 May 2024 19:39:18 UTC
The branch main has been updated by imp:
URL: https://cgit.FreeBSD.org/src/commit/?id=099a81a4173bc5b121e50d4e27ea5fafdda8475b
commit 099a81a4173bc5b121e50d4e27ea5fafdda8475b
Author: Ricardo Branco <rbranco@suse.de>
AuthorDate: 2024-05-04 13:38:20 +0000
Commit: Warner Losh <imp@FreeBSD.org>
CommitDate: 2024-05-11 19:37:47 +0000
linprocfs: Add support for proc/sysvipc/{msg,sem,shm}
Signed-off-by: Ricardo Branco <rbranco@suse.de>
Reviewed by: imp
Pull Request: https://github.com/freebsd/freebsd-src/pull/1218
---
sys/compat/linprocfs/linprocfs.c | 182 +++++++++++++++++++++++++++++++++++++++
1 file changed, 182 insertions(+)
diff --git a/sys/compat/linprocfs/linprocfs.c b/sys/compat/linprocfs/linprocfs.c
index 391d5f679ee5..a877d4065c18 100644
--- a/sys/compat/linprocfs/linprocfs.c
+++ b/sys/compat/linprocfs/linprocfs.c
@@ -126,6 +126,9 @@
#define P2K(x) ((x) << (PAGE_SHIFT - 10)) /* pages to kbytes */
#define TV2J(x) ((x)->tv_sec * 100UL + (x)->tv_usec / 10000)
+/* Value defined in sys/kern/sysv_shm.c */
+#define SHMSEG_ALLOCATED 0x0800
+
/**
* @brief Mapping of ki_stat in struct kinfo_proc to the linux state
*
@@ -2092,6 +2095,176 @@ linprocfs_domax_map_cnt(PFS_FILL_ARGS)
return (0);
}
+/*
+ * Filler function for proc/sysvipc/msg
+ */
+static int
+linprocfs_dosysvipc_msg(PFS_FILL_ARGS)
+{
+ struct msqid_kernel *msqids;
+ u_long id, msgmni;
+ size_t sz;
+ int error;
+
+ sbuf_printf(sb,
+ "%10s %10s %4s %10s %10s %5s %5s %5s %5s %5s %5s %10s %10s %10s\n",
+ "key", "msqid", "perms", "cbytes", "qnum", "lspid", "lrpid",
+ "uid", "gid", "cuid", "cgid", "stime", "rtime", "ctime");
+
+again:
+ msgmni = msginfo.msgmni;
+ sz = sizeof(struct msqid_kernel) * msgmni;
+ msqids = malloc(sz, M_TEMP, M_NOWAIT);
+ if (msqids == NULL)
+ return (ENOMEM);
+ if (msgmni != msginfo.msgmni) {
+ free(msqids, M_TEMP);
+ goto again;
+ }
+
+ error = kernel_sysctlbyname(curthread, "kern.ipc.msqids", msqids, &sz,
+ NULL, 0, 0, 0);
+ if (error != 0) {
+ free(msqids, M_TEMP);
+ return (error);
+ }
+ msgmni = sz / sizeof(struct msqid_kernel);
+
+ for (id = 0; id < msgmni; id++)
+ if (msqids[id].u.msg_qbytes != 0)
+ sbuf_printf(sb,
+ "%10d %10lu %4o %10lu %10lu %5u %5u %5u %5u %5u %5u %10ld %10ld %10ld\n",
+ (int) msqids[id].u.msg_perm.key,
+ IXSEQ_TO_IPCID(id, msqids[id].u.msg_perm),
+ msqids[id].u.msg_perm.mode,
+ msqids[id].u.msg_cbytes,
+ msqids[id].u.msg_qnum,
+ msqids[id].u.msg_lspid,
+ msqids[id].u.msg_lrpid,
+ msqids[id].u.msg_perm.uid,
+ msqids[id].u.msg_perm.gid,
+ msqids[id].u.msg_perm.cuid,
+ msqids[id].u.msg_perm.cgid,
+ msqids[id].u.msg_stime,
+ msqids[id].u.msg_rtime,
+ msqids[id].u.msg_ctime);
+
+ free(msqids, M_TEMP);
+ return (0);
+}
+
+/*
+ * Filler function for proc/sysvipc/sem
+ */
+static int
+linprocfs_dosysvipc_sem(PFS_FILL_ARGS)
+{
+ struct semid_kernel *semids;
+ u_long id, semmni;
+ size_t sz;
+ int error;
+
+ sbuf_printf(sb, "%10s %10s %4s %10s %5s %5s %5s %5s %10s %10s\n",
+ "key", "semid", "perms", "nsems", "uid", "gid", "cuid", "cgid",
+ "otime", "ctime");
+
+again:
+ semmni = seminfo.semmni;
+ sz = sizeof(struct semid_kernel) * semmni;
+ semids = malloc(sz, M_TEMP, M_NOWAIT);
+ if (semids == NULL)
+ return (ENOMEM);
+ if (semmni != seminfo.semmni) {
+ free(semids, M_TEMP);
+ goto again;
+ }
+
+ error = kernel_sysctlbyname(curthread, "kern.ipc.sema", semids, &sz,
+ NULL, 0, 0, 0);
+ if (error != 0) {
+ free(semids, M_TEMP);
+ return (error);
+ }
+ semmni = sz / sizeof(struct semid_kernel);
+
+ for (id = 0; id < semmni; id++)
+ if ((semids[id].u.sem_perm.mode & SEM_ALLOC) != 0)
+ sbuf_printf(sb,
+ "%10d %10lu %4o %10u %5u %5u %5u %5u %10ld %10ld\n",
+ (int) semids[id].u.sem_perm.key,
+ IXSEQ_TO_IPCID(id, semids[id].u.sem_perm),
+ semids[id].u.sem_perm.mode,
+ semids[id].u.sem_nsems,
+ semids[id].u.sem_perm.uid,
+ semids[id].u.sem_perm.gid,
+ semids[id].u.sem_perm.cuid,
+ semids[id].u.sem_perm.cgid,
+ semids[id].u.sem_otime,
+ semids[id].u.sem_ctime);
+
+ free(semids, M_TEMP);
+ return (0);
+}
+
+/*
+ * Filler function for proc/sysvipc/shm
+ */
+static int
+linprocfs_dosysvipc_shm(PFS_FILL_ARGS)
+{
+ struct shmid_kernel *shmids;
+ u_long id, shmmni;
+ size_t sz;
+ int error;
+
+ sbuf_printf(sb,
+ "%10s %10s %s %21s %5s %5s %5s %5s %5s %5s %5s %10s %10s %10s %21s %21s\n",
+ "key", "shmid", "perms", "size", "cpid", "lpid", "nattch", "uid",
+ "gid", "cuid", "cgid", "atime", "dtime", "ctime", "rss", "swap");
+
+again:
+ shmmni = shminfo.shmmni;
+ sz = sizeof(struct shmid_kernel) * shmmni;
+ shmids = malloc(sz, M_TEMP, M_NOWAIT);
+ if (shmids == NULL)
+ return (ENOMEM);
+ if (shmmni != shminfo.shmmni) {
+ free(shmids, M_TEMP);
+ goto again;
+ }
+
+ error = kernel_sysctlbyname(curthread, "kern.ipc.shmsegs", shmids, &sz,
+ NULL, 0, 0, 0);
+ if (error != 0) {
+ free(shmids, M_TEMP);
+ return (error);
+ }
+ shmmni = sz / sizeof(struct shmid_kernel);
+
+ for (id = 0; id < shmmni; id++)
+ if ((shmids[id].u.shm_perm.mode & SHMSEG_ALLOCATED) != 0)
+ sbuf_printf(sb,
+ "%10d %10lu %4o %21lu %5u %5u %5u %5u %5u %5u %5u %10ld %10ld %10ld %21d %21d\n",
+ (int) shmids[id].u.shm_perm.key,
+ IXSEQ_TO_IPCID(id, shmids[id].u.shm_perm),
+ shmids[id].u.shm_perm.mode,
+ shmids[id].u.shm_segsz,
+ shmids[id].u.shm_cpid,
+ shmids[id].u.shm_lpid,
+ shmids[id].u.shm_nattch,
+ shmids[id].u.shm_perm.uid,
+ shmids[id].u.shm_perm.gid,
+ shmids[id].u.shm_perm.cuid,
+ shmids[id].u.shm_perm.cgid,
+ shmids[id].u.shm_atime,
+ shmids[id].u.shm_dtime,
+ shmids[id].u.shm_ctime,
+ 0, 0); /* XXX rss & swp are not supported */
+
+ free(shmids, M_TEMP);
+ return (0);
+}
+
/*
* Constructor
*/
@@ -2241,6 +2414,15 @@ linprocfs_init(PFS_INIT_ARGS)
pfs_create_file(dir, "max_map_count", &linprocfs_domax_map_cnt,
NULL, NULL, NULL, PFS_RD);
+ /* /proc/sysvipc/... */
+ dir = pfs_create_dir(root, "sysvipc", NULL, NULL, NULL, 0);
+ pfs_create_file(dir, "msg", &linprocfs_dosysvipc_msg,
+ NULL, NULL, NULL, PFS_RD);
+ pfs_create_file(dir, "sem", &linprocfs_dosysvipc_sem,
+ NULL, NULL, NULL, PFS_RD);
+ pfs_create_file(dir, "shm", &linprocfs_dosysvipc_shm,
+ NULL, NULL, NULL, PFS_RD);
+
return (0);
}