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-rw-r--r--usr/src/uts/common/brand/lx/procfs/lx_proc.h2
-rw-r--r--usr/src/uts/common/brand/lx/procfs/lx_prvnops.c122
2 files changed, 119 insertions, 5 deletions
diff --git a/usr/src/uts/common/brand/lx/procfs/lx_proc.h b/usr/src/uts/common/brand/lx/procfs/lx_proc.h
index e2765dbe07..cd0c9ed2cb 100644
--- a/usr/src/uts/common/brand/lx/procfs/lx_proc.h
+++ b/usr/src/uts/common/brand/lx/procfs/lx_proc.h
@@ -118,6 +118,7 @@ typedef enum lxpr_nodetype {
LXPR_PID_MAPS, /* /proc/<pid>/maps */
LXPR_PID_MEM, /* /proc/<pid>/mem */
LXPR_PID_MOUNTINFO, /* /proc/<pid>/mountinfo */
+ LXPR_PID_OOM_SCR_ADJ, /* /proc/<pid>/oom_score_adj */
LXPR_PID_ROOTDIR, /* /proc/<pid>/root */
LXPR_PID_STAT, /* /proc/<pid>/stat */
LXPR_PID_STATM, /* /proc/<pid>/statm */
@@ -137,6 +138,7 @@ typedef enum lxpr_nodetype {
LXPR_PID_TID_MAPS, /* /proc/<pid>/task/<tid>/maps */
LXPR_PID_TID_MEM, /* /proc/<pid>/task/<tid>/mem */
LXPR_PID_TID_MOUNTINFO, /* /proc/<pid>/task/<tid>/mountinfo */
+ LXPR_PID_TID_OOM_SCR_ADJ, /* /proc/<pid>/task/<tid>/oom_score_adj */
LXPR_PID_TID_ROOTDIR, /* /proc/<pid>/task/<tid>/root */
LXPR_PID_TID_STAT, /* /proc/<pid>/task/<tid>/stat */
LXPR_PID_TID_STATM, /* /proc/<pid>/task/<tid>/statm */
diff --git a/usr/src/uts/common/brand/lx/procfs/lx_prvnops.c b/usr/src/uts/common/brand/lx/procfs/lx_prvnops.c
index fae0d90f6b..9f3ee2ebf6 100644
--- a/usr/src/uts/common/brand/lx/procfs/lx_prvnops.c
+++ b/usr/src/uts/common/brand/lx/procfs/lx_prvnops.c
@@ -93,7 +93,10 @@ vnodeops_t *lxpr_vnodeops;
static int lxpr_open(vnode_t **, int, cred_t *, caller_context_t *);
static int lxpr_close(vnode_t *, int, int, offset_t, cred_t *,
caller_context_t *);
+static int lxpr_create(struct vnode *, char *, struct vattr *, enum vcexcl,
+ int, struct vnode **, struct cred *, int, caller_context_t *, vsecattr_t *);
static int lxpr_read(vnode_t *, uio_t *, int, cred_t *, caller_context_t *);
+static int lxpr_write(vnode_t *, uio_t *, int, cred_t *, caller_context_t *);
static int lxpr_getattr(vnode_t *, vattr_t *, int, cred_t *,
caller_context_t *);
static int lxpr_access(vnode_t *, int, int, cred_t *, caller_context_t *);
@@ -158,6 +161,7 @@ static void lxpr_read_pid_env(lxpr_node_t *, lxpr_uiobuf_t *);
static void lxpr_read_pid_limits(lxpr_node_t *, lxpr_uiobuf_t *);
static void lxpr_read_pid_maps(lxpr_node_t *, lxpr_uiobuf_t *);
static void lxpr_read_pid_mountinfo(lxpr_node_t *, lxpr_uiobuf_t *);
+static void lxpr_read_pid_oom_scr_adj(lxpr_node_t *, lxpr_uiobuf_t *);
static void lxpr_read_pid_stat(lxpr_node_t *, lxpr_uiobuf_t *);
static void lxpr_read_pid_statm(lxpr_node_t *, lxpr_uiobuf_t *);
static void lxpr_read_pid_status(lxpr_node_t *, lxpr_uiobuf_t *);
@@ -226,9 +230,11 @@ const fs_operation_def_t lxpr_vnodeops_template[] = {
VOPNAME_OPEN, { .vop_open = lxpr_open },
VOPNAME_CLOSE, { .vop_close = lxpr_close },
VOPNAME_READ, { .vop_read = lxpr_read },
+ VOPNAME_WRITE, { .vop_read = lxpr_write },
VOPNAME_GETATTR, { .vop_getattr = lxpr_getattr },
VOPNAME_ACCESS, { .vop_access = lxpr_access },
VOPNAME_LOOKUP, { .vop_lookup = lxpr_lookup },
+ VOPNAME_CREATE, { .vop_create = lxpr_create },
VOPNAME_READDIR, { .vop_readdir = lxpr_readdir },
VOPNAME_READLINK, { .vop_readlink = lxpr_readlink },
VOPNAME_FSYNC, { .error = lxpr_sync },
@@ -286,6 +292,7 @@ static lxpr_dirent_t piddir[] = {
{ LXPR_PID_MAPS, "maps" },
{ LXPR_PID_MEM, "mem" },
{ LXPR_PID_MOUNTINFO, "mountinfo" },
+ { LXPR_PID_OOM_SCR_ADJ, "oom_score_adj" },
{ LXPR_PID_ROOTDIR, "root" },
{ LXPR_PID_STAT, "stat" },
{ LXPR_PID_STATM, "statm" },
@@ -311,6 +318,7 @@ static lxpr_dirent_t tiddir[] = {
{ LXPR_PID_MAPS, "maps" },
{ LXPR_PID_MEM, "mem" },
{ LXPR_PID_MOUNTINFO, "mountinfo" },
+ { LXPR_PID_OOM_SCR_ADJ, "oom_score_adj" },
{ LXPR_PID_ROOTDIR, "root" },
{ LXPR_PID_TID_STAT, "stat" },
{ LXPR_PID_STATM, "statm" },
@@ -438,11 +446,9 @@ lxpr_open(vnode_t **vpp, int flag, cred_t *cr, caller_context_t *ct)
vnode_t *rvp;
int error = 0;
- /*
- * We only allow reading in this file systrem
- */
- if (flag & FWRITE)
- return (EROFS);
+ /* Restrict writes to oom_score_adj for now */
+ if (flag & FWRITE && type != LXPR_PID_OOM_SCR_ADJ)
+ return (EPERM);
/*
* If we are opening an underlying file only allow regular files,
@@ -520,6 +526,7 @@ static void (*lxpr_read_function[LXPR_NFILES])() = {
lxpr_read_pid_maps, /* /proc/<pid>/maps */
lxpr_read_empty, /* /proc/<pid>/mem */
lxpr_read_pid_mountinfo, /* /proc/<pid>/mountinfo */
+ lxpr_read_pid_oom_scr_adj, /* /proc/<pid>/oom_score_adj */
lxpr_read_invalid, /* /proc/<pid>/root */
lxpr_read_pid_stat, /* /proc/<pid>/stat */
lxpr_read_pid_statm, /* /proc/<pid>/statm */
@@ -539,6 +546,7 @@ static void (*lxpr_read_function[LXPR_NFILES])() = {
lxpr_read_pid_maps, /* /proc/<pid>/task/<tid>/maps */
lxpr_read_empty, /* /proc/<pid>/task/<tid>/mem */
lxpr_read_pid_mountinfo, /* /proc/<pid>/task/<tid>/mountinfo */
+ lxpr_read_pid_oom_scr_adj, /* /proc/<pid>/task/<tid>/oom_scr_adj */
lxpr_read_invalid, /* /proc/<pid>/task/<tid>/root */
lxpr_read_pid_tid_stat, /* /proc/<pid>/task/<tid>/stat */
lxpr_read_pid_statm, /* /proc/<pid>/task/<tid>/statm */
@@ -621,6 +629,7 @@ static vnode_t *(*lxpr_lookup_function[LXPR_NFILES])() = {
lxpr_lookup_not_a_dir, /* /proc/<pid>/maps */
lxpr_lookup_not_a_dir, /* /proc/<pid>/mem */
lxpr_lookup_not_a_dir, /* /proc/<pid>/mountinfo */
+ lxpr_lookup_not_a_dir, /* /proc/<pid>/oom_score_adj */
lxpr_lookup_not_a_dir, /* /proc/<pid>/root */
lxpr_lookup_not_a_dir, /* /proc/<pid>/stat */
lxpr_lookup_not_a_dir, /* /proc/<pid>/statm */
@@ -640,6 +649,7 @@ static vnode_t *(*lxpr_lookup_function[LXPR_NFILES])() = {
lxpr_lookup_not_a_dir, /* /proc/<pid>/task/<tid>/maps */
lxpr_lookup_not_a_dir, /* /proc/<pid>/task/<tid>/mem */
lxpr_lookup_not_a_dir, /* /proc/<pid>/task/<tid>/mountinfo */
+ lxpr_lookup_not_a_dir, /* /proc/<pid>/task/<tid>/oom_scr_adj */
lxpr_lookup_not_a_dir, /* /proc/<pid>/task/<tid>/root */
lxpr_lookup_not_a_dir, /* /proc/<pid>/task/<tid>/stat */
lxpr_lookup_not_a_dir, /* /proc/<pid>/task/<tid>/statm */
@@ -722,6 +732,7 @@ static int (*lxpr_readdir_function[LXPR_NFILES])() = {
lxpr_readdir_not_a_dir, /* /proc/<pid>/maps */
lxpr_readdir_not_a_dir, /* /proc/<pid>/mem */
lxpr_readdir_not_a_dir, /* /proc/<pid>/mountinfo */
+ lxpr_readdir_not_a_dir, /* /proc/<pid>/oom_score_adj */
lxpr_readdir_not_a_dir, /* /proc/<pid>/root */
lxpr_readdir_not_a_dir, /* /proc/<pid>/stat */
lxpr_readdir_not_a_dir, /* /proc/<pid>/statm */
@@ -741,6 +752,7 @@ static int (*lxpr_readdir_function[LXPR_NFILES])() = {
lxpr_readdir_not_a_dir, /* /proc/<pid>/task/<tid>/maps */
lxpr_readdir_not_a_dir, /* /proc/<pid>/task/<tid>/mem */
lxpr_readdir_not_a_dir, /* /proc/<pid>/task/<tid>/mountinfo */
+ lxpr_readdir_not_a_dir, /* /proc/<pid>/task/<tid/oom_scr_adj */
lxpr_readdir_not_a_dir, /* /proc/<pid>/task/<tid>/root */
lxpr_readdir_not_a_dir, /* /proc/<pid>/task/<tid>/stat */
lxpr_readdir_not_a_dir, /* /proc/<pid>/task/<tid>/statm */
@@ -1374,6 +1386,30 @@ nextp:
}
/*
+ * lxpr_read_pid_oom_scr_adj(): read oom_score_adj for process
+ */
+static void
+lxpr_read_pid_oom_scr_adj(lxpr_node_t *lxpnp, lxpr_uiobuf_t *uiobuf)
+{
+ proc_t *p;
+
+ ASSERT(lxpnp->lxpr_type == LXPR_PID_OOM_SCR_ADJ ||
+ lxpnp->lxpr_type == LXPR_PID_TID_OOM_SCR_ADJ);
+
+ p = lxpr_lock(lxpnp->lxpr_pid);
+ if (p == NULL) {
+ lxpr_uiobuf_seterr(uiobuf, EINVAL);
+ return;
+ }
+
+ /* always 0 */
+ lxpr_uiobuf_printf(uiobuf, "0\n");
+
+ lxpr_unlock(p);
+}
+
+
+/*
* lxpr_read_pid_statm(): memory status file
*/
static void
@@ -5398,3 +5434,79 @@ lxpr_realvp(vnode_t *vp, vnode_t **vpp, caller_context_t *ct)
*vpp = vp;
return (0);
}
+
+static int
+lxpr_write(vnode_t *vp, uio_t *uiop, int ioflag, cred_t *cr,
+ caller_context_t *ct)
+{
+ /* pretend we wrote the whole thing */
+ uiop->uio_offset += uiop->uio_resid;
+ uiop->uio_resid = 0;
+
+ return (0);
+}
+
+/*
+ * We need to allow open with O_CREAT for the oom_score_adj file.
+ */
+/*ARGSUSED7*/
+static int
+lxpr_create(struct vnode *dvp, char *nm, struct vattr *vap,
+ enum vcexcl exclusive, int mode, struct vnode **vpp, struct cred *cred,
+ int flag, caller_context_t *ct, vsecattr_t *vsecp)
+{
+ lxpr_node_t *lxpnp = VTOLXP(dvp);
+ lxpr_nodetype_t type = lxpnp->lxpr_type;
+ vnode_t *vp = NULL;
+ int error;
+
+ ASSERT(type < LXPR_NFILES);
+
+ /*
+ * restrict create permission to owner or root
+ */
+ if ((error = lxpr_access(dvp, VEXEC, 0, cred, ct)) != 0) {
+ return (error);
+ }
+
+ if (*nm == '\0')
+ return (EPERM);
+
+ if (dvp->v_type != VDIR)
+ return (EPERM);
+
+ if (exclusive == EXCL)
+ return (EEXIST);
+
+ /*
+ * We're currently restricting O_CREAT to the oom_score_adj file.
+ */
+ if (strcmp(nm, "oom_score_adj") != 0)
+ return (EPERM);
+
+ if (type == LXPR_PIDDIR) {
+ proc_t *p;
+ p = lxpr_lock(lxpnp->lxpr_pid);
+ if (p != NULL)
+ vp = lxpr_lookup_common(dvp, nm, p, piddir,
+ PIDDIRFILES);
+ lxpr_unlock(p);
+ }
+
+ if (vp != NULL) { /* name found */
+ /*
+ * Creating an existing file, allow it for regular files.
+ */
+ if (vp->v_type == VDIR)
+ return (EISDIR);
+
+ *vpp = vp;
+ return (0);
+ }
+
+ /*
+ * proc doesn't allow creation of additional, non-subsystem specific
+ * files in a dir
+ */
+ return (EPERM);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2025-05-18 01:36:27 +0000