2 * linux/kernel/vserver/limit.c
4 * Virtual Server: Context Limits
6 * Copyright (C) 2004 Herbert Pƶtzl
8 * V0.01 broken out from vcontext V0.05
12 #include <linux/config.h>
13 #include <linux/vserver/limit.h>
14 #include <linux/vserver/context.h>
15 #include <linux/vserver/switch.h>
16 #include <linux/vs_base.h>
17 #include <linux/vs_context.h>
18 #include <linux/vs_limit.h>
20 #include <asm/errno.h>
21 #include <asm/uaccess.h>
24 static int is_valid_rlimit(int id)
40 static inline uint64_t vc_get_rlim(struct vx_info *vxi, int id)
44 limit = vxi->limit.rlim[id];
45 if (limit == RLIM_INFINITY)
46 return CRLIM_INFINITY;
50 int vc_get_rlimit(uint32_t id, void __user *data)
53 struct vcmd_ctx_rlimit_v0 vc_data;
55 if (copy_from_user (&vc_data, data, sizeof(vc_data)))
57 if (!is_valid_rlimit(vc_data.id))
60 vxi = locate_vx_info(id);
64 vc_data.maximum = vc_get_rlim(vxi, vc_data.id);
65 vc_data.minimum = CRLIM_UNSET;
66 vc_data.softlimit = CRLIM_UNSET;
69 if (copy_to_user (data, &vc_data, sizeof(vc_data)))
74 int vc_set_rlimit(uint32_t id, void __user *data)
77 struct vcmd_ctx_rlimit_v0 vc_data;
79 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RESOURCE))
81 if (copy_from_user (&vc_data, data, sizeof(vc_data)))
83 if (!is_valid_rlimit(vc_data.id))
86 vxi = locate_vx_info(id);
90 if (vc_data.maximum != CRLIM_KEEP)
91 vxi->limit.rlim[vc_data.id] = vc_data.maximum;
92 printk("setting [%d] = %d\n", vc_data.id, (int)vc_data.maximum);
98 int vc_get_rlimit_mask(uint32_t id, void __user *data)
100 static struct vcmd_ctx_rlimit_mask_v0 mask = {
106 (1 << RLIMIT_NPROC) |
107 (1 << RLIMIT_NOFILE) |
108 (1 << RLIMIT_MEMLOCK) |
113 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RESOURCE))
115 if (copy_to_user(data, &mask, sizeof(mask)))
121 void vx_vsi_meminfo(struct sysinfo *val)
123 struct vx_info *vxi = current->vx_info;
126 v = vxi->limit.rlim[RLIMIT_RSS];
127 if (v != RLIM_INFINITY)
128 val->totalram = min(val->totalram, v);
129 v = atomic_read(&vxi->limit.rcur[RLIMIT_RSS]);
130 val->freeram = (v < val->totalram) ? val->totalram - v : 0;
137 void vx_vsi_swapinfo(struct sysinfo *val)
139 struct vx_info *vxi = current->vx_info;
142 v = vxi->limit.rlim[RLIMIT_RSS];
143 w = vxi->limit.rlim[RLIMIT_AS];
144 if (w != RLIM_INFINITY)
145 val->totalswap = min(val->totalswap, w -
146 ((v != RLIM_INFINITY) ? v : 0));
147 w = atomic_read(&vxi->limit.rcur[RLIMIT_AS]);
148 val->freeswap = (w < val->totalswap) ? val->totalswap - w : 0;