diff options
Diffstat (limited to 'ipc')
| -rw-r--r-- | ipc/compat.c | 6 | ||||
| -rw-r--r-- | ipc/compat_mq.c | 5 | ||||
| -rw-r--r-- | ipc/shm.c | 63 |
3 files changed, 53 insertions, 21 deletions
diff --git a/ipc/compat.c b/ipc/compat.c index 9dc2c7d3c9e6..845a28738d3a 100644 --- a/ipc/compat.c +++ b/ipc/compat.c @@ -241,6 +241,8 @@ long compat_sys_semctl(int first, int second, int third, void __user *uptr) struct semid64_ds __user *up64; int version = compat_ipc_parse_version(&third); + memset(&s64, 0, sizeof(s64)); + if (!uptr) return -EINVAL; if (get_user(pad, (u32 __user *) uptr)) @@ -421,6 +423,8 @@ long compat_sys_msgctl(int first, int second, void __user *uptr) int version = compat_ipc_parse_version(&second); void __user *p; + memset(&m64, 0, sizeof(m64)); + switch (second & (~IPC_64)) { case IPC_INFO: case IPC_RMID: @@ -594,6 +598,8 @@ long compat_sys_shmctl(int first, int second, void __user *uptr) int err, err2; int version = compat_ipc_parse_version(&second); + memset(&s64, 0, sizeof(s64)); + switch (second & (~IPC_64)) { case IPC_RMID: case SHM_LOCK: diff --git a/ipc/compat_mq.c b/ipc/compat_mq.c index d8d1e9ff4e88..380ea4fe08e7 100644 --- a/ipc/compat_mq.c +++ b/ipc/compat_mq.c @@ -53,6 +53,9 @@ asmlinkage long compat_sys_mq_open(const char __user *u_name, void __user *p = NULL; if (u_attr && oflag & O_CREAT) { struct mq_attr attr; + + memset(&attr, 0, sizeof(attr)); + p = compat_alloc_user_space(sizeof(attr)); if (get_compat_mq_attr(&attr, u_attr) || copy_to_user(p, &attr, sizeof(attr))) @@ -127,6 +130,8 @@ asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes, struct mq_attr __user *p = compat_alloc_user_space(2 * sizeof(*p)); long ret; + memset(&mqstat, 0, sizeof(mqstat)); + if (u_mqstat) { if (get_compat_mq_attr(&mqstat, u_mqstat) || copy_to_user(p, &mqstat, sizeof(mqstat))) diff --git a/ipc/shm.c b/ipc/shm.c index 7bc46a9fe1f8..fd658a1c2b88 100644 --- a/ipc/shm.c +++ b/ipc/shm.c @@ -108,7 +108,11 @@ void __init shm_init (void) { shm_init_ns(&init_ipc_ns); ipc_init_proc_interface("sysvipc/shm", - " key shmid perms size cpid lpid nattch uid gid cuid cgid atime dtime ctime\n", +#if BITS_PER_LONG <= 32 + " key shmid perms size cpid lpid nattch uid gid cuid cgid atime dtime ctime rss swap\n", +#else + " key shmid perms size cpid lpid nattch uid gid cuid cgid atime dtime ctime rss swap\n", +#endif IPC_SHM_IDS, sysvipc_shm_proc_show); } @@ -544,6 +548,34 @@ static inline unsigned long copy_shminfo_to_user(void __user *buf, struct shminf } /* + * Calculate and add used RSS and swap pages of a shm. + * Called with shm_ids.rw_mutex held as a reader + */ +static void shm_add_rss_swap(struct shmid_kernel *shp, + unsigned long *rss_add, unsigned long *swp_add) +{ + struct inode *inode; + + inode = shp->shm_file->f_path.dentry->d_inode; + + if (is_file_hugepages(shp->shm_file)) { + struct address_space *mapping = inode->i_mapping; + struct hstate *h = hstate_file(shp->shm_file); + *rss_add += pages_per_huge_page(h) * mapping->nrpages; + } else { +#ifdef CONFIG_SHMEM + struct shmem_inode_info *info = SHMEM_I(inode); + spin_lock(&info->lock); + *rss_add += inode->i_mapping->nrpages; + *swp_add += info->swapped; + spin_unlock(&info->lock); +#else + *rss_add += inode->i_mapping->nrpages; +#endif + } +} + +/* * Called with shm_ids.rw_mutex held as a reader */ static void shm_get_stat(struct ipc_namespace *ns, unsigned long *rss, @@ -560,30 +592,13 @@ static void shm_get_stat(struct ipc_namespace *ns, unsigned long *rss, for (total = 0, next_id = 0; total < in_use; next_id++) { struct kern_ipc_perm *ipc; struct shmid_kernel *shp; - struct inode *inode; ipc = idr_find(&shm_ids(ns).ipcs_idr, next_id); if (ipc == NULL) continue; shp = container_of(ipc, struct shmid_kernel, shm_perm); - inode = shp->shm_file->f_path.dentry->d_inode; - - if (is_file_hugepages(shp->shm_file)) { - struct address_space *mapping = inode->i_mapping; - struct hstate *h = hstate_file(shp->shm_file); - *rss += pages_per_huge_page(h) * mapping->nrpages; - } else { -#ifdef CONFIG_SHMEM - struct shmem_inode_info *info = SHMEM_I(inode); - spin_lock(&info->lock); - *rss += inode->i_mapping->nrpages; - *swp += info->swapped; - spin_unlock(&info->lock); -#else - *rss += inode->i_mapping->nrpages; -#endif - } + shm_add_rss_swap(shp, rss, swp); total++; } @@ -1072,6 +1087,9 @@ SYSCALL_DEFINE1(shmdt, char __user *, shmaddr) static int sysvipc_shm_proc_show(struct seq_file *s, void *it) { struct shmid_kernel *shp = it; + unsigned long rss = 0, swp = 0; + + shm_add_rss_swap(shp, &rss, &swp); #if BITS_PER_LONG <= 32 #define SIZE_SPEC "%10lu" @@ -1081,7 +1099,8 @@ static int sysvipc_shm_proc_show(struct seq_file *s, void *it) return seq_printf(s, "%10d %10d %4o " SIZE_SPEC " %5u %5u " - "%5lu %5u %5u %5u %5u %10lu %10lu %10lu\n", + "%5lu %5u %5u %5u %5u %10lu %10lu %10lu " + SIZE_SPEC " " SIZE_SPEC "\n", shp->shm_perm.key, shp->shm_perm.id, shp->shm_perm.mode, @@ -1095,6 +1114,8 @@ static int sysvipc_shm_proc_show(struct seq_file *s, void *it) shp->shm_perm.cgid, shp->shm_atim, shp->shm_dtim, - shp->shm_ctim); + shp->shm_ctim, + rss * PAGE_SIZE, + swp * PAGE_SIZE); } #endif |