diff options
Diffstat (limited to 'fs/proc')
-rw-r--r-- | fs/proc/Makefile | 2 | ||||
-rw-r--r-- | fs/proc/base.c | 36 | ||||
-rw-r--r-- | fs/proc/inode.c | 17 | ||||
-rw-r--r-- | fs/proc/page.c | 2 | ||||
-rw-r--r-- | fs/proc/proc_sysctl.c | 1 | ||||
-rw-r--r-- | fs/proc/root.c | 1 | ||||
-rw-r--r-- | fs/proc/task_mmu.c | 14 | ||||
-rw-r--r-- | fs/proc/vmcore.c | 2 |
8 files changed, 42 insertions, 33 deletions
diff --git a/fs/proc/Makefile b/fs/proc/Makefile index 11a7b5c..2758e2a 100644 --- a/fs/proc/Makefile +++ b/fs/proc/Makefile @@ -2,7 +2,7 @@ # Makefile for the Linux proc filesystem routines. # -obj-$(CONFIG_PROC_FS) += proc.o +obj-y += proc.o proc-y := nommu.o task_nommu.o proc-$(CONFIG_MMU) := mmu.o task_mmu.o diff --git a/fs/proc/base.c b/fs/proc/base.c index c806dfb..dc5d5f5 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -149,18 +149,13 @@ static unsigned int pid_entry_count_dirs(const struct pid_entry *entries, return count; } -static int get_fs_path(struct task_struct *task, struct path *path, bool root) +static int get_task_root(struct task_struct *task, struct path *root) { - struct fs_struct *fs; int result = -ENOENT; task_lock(task); - fs = task->fs; - if (fs) { - read_lock(&fs->lock); - *path = root ? fs->root : fs->pwd; - path_get(path); - read_unlock(&fs->lock); + if (task->fs) { + get_fs_root(task->fs, root); result = 0; } task_unlock(task); @@ -173,7 +168,12 @@ static int proc_cwd_link(struct inode *inode, struct path *path) int result = -ENOENT; if (task) { - result = get_fs_path(task, path, 0); + task_lock(task); + if (task->fs) { + get_fs_pwd(task->fs, path); + result = 0; + } + task_unlock(task); put_task_struct(task); } return result; @@ -185,7 +185,7 @@ static int proc_root_link(struct inode *inode, struct path *path) int result = -ENOENT; if (task) { - result = get_fs_path(task, path, 1); + result = get_task_root(task, path); put_task_struct(task); } return result; @@ -597,7 +597,7 @@ static int mounts_open_common(struct inode *inode, struct file *file, get_mnt_ns(ns); } rcu_read_unlock(); - if (ns && get_fs_path(task, &root, 1) == 0) + if (ns && get_task_root(task, &root) == 0) ret = 0; put_task_struct(task); } @@ -1151,6 +1151,7 @@ static ssize_t oom_score_adj_write(struct file *file, const char __user *buf, static const struct file_operations proc_oom_score_adj_operations = { .read = oom_score_adj_read, .write = oom_score_adj_write, + .llseek = default_llseek, }; #ifdef CONFIG_AUDITSYSCALL @@ -1526,7 +1527,7 @@ static int do_proc_readlink(struct path *path, char __user *buffer, int buflen) if (!tmp) return -ENOMEM; - pathname = d_path(path, tmp, PAGE_SIZE); + pathname = d_path_with_unreachable(path, tmp, PAGE_SIZE); len = PTR_ERR(pathname); if (IS_ERR(pathname)) goto out; @@ -2039,11 +2040,13 @@ static ssize_t proc_fdinfo_read(struct file *file, char __user *buf, static const struct file_operations proc_fdinfo_file_operations = { .open = nonseekable_open, .read = proc_fdinfo_read, + .llseek = no_llseek, }; static const struct file_operations proc_fd_operations = { .read = generic_read_dir, .readdir = proc_readfd, + .llseek = default_llseek, }; /* @@ -2112,6 +2115,7 @@ static int proc_readfdinfo(struct file *filp, void *dirent, filldir_t filldir) static const struct file_operations proc_fdinfo_operations = { .read = generic_read_dir, .readdir = proc_readfdinfo, + .llseek = default_llseek, }; /* @@ -2343,6 +2347,7 @@ static int proc_attr_dir_readdir(struct file * filp, static const struct file_operations proc_attr_dir_operations = { .read = generic_read_dir, .readdir = proc_attr_dir_readdir, + .llseek = default_llseek, }; static struct dentry *proc_attr_dir_lookup(struct inode *dir, @@ -2675,7 +2680,7 @@ static const struct pid_entry tgid_base_stuff[] = { INF("auxv", S_IRUSR, proc_pid_auxv), ONE("status", S_IRUGO, proc_pid_status), ONE("personality", S_IRUSR, proc_pid_personality), - INF("limits", S_IRUSR, proc_pid_limits), + INF("limits", S_IRUGO, proc_pid_limits), #ifdef CONFIG_SCHED_DEBUG REG("sched", S_IRUGO|S_IWUSR, proc_pid_sched_operations), #endif @@ -2751,6 +2756,7 @@ static int proc_tgid_base_readdir(struct file * filp, static const struct file_operations proc_tgid_base_operations = { .read = generic_read_dir, .readdir = proc_tgid_base_readdir, + .llseek = default_llseek, }; static struct dentry *proc_tgid_base_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd){ @@ -3011,7 +3017,7 @@ static const struct pid_entry tid_base_stuff[] = { INF("auxv", S_IRUSR, proc_pid_auxv), ONE("status", S_IRUGO, proc_pid_status), ONE("personality", S_IRUSR, proc_pid_personality), - INF("limits", S_IRUSR, proc_pid_limits), + INF("limits", S_IRUGO, proc_pid_limits), #ifdef CONFIG_SCHED_DEBUG REG("sched", S_IRUGO|S_IWUSR, proc_pid_sched_operations), #endif @@ -3088,6 +3094,7 @@ static struct dentry *proc_tid_base_lookup(struct inode *dir, struct dentry *den static const struct file_operations proc_tid_base_operations = { .read = generic_read_dir, .readdir = proc_tid_base_readdir, + .llseek = default_llseek, }; static const struct inode_operations proc_tid_base_inode_operations = { @@ -3324,4 +3331,5 @@ static const struct inode_operations proc_task_inode_operations = { static const struct file_operations proc_task_operations = { .read = generic_read_dir, .readdir = proc_task_readdir, + .llseek = default_llseek, }; diff --git a/fs/proc/inode.c b/fs/proc/inode.c index 23561cd..9c2b5f4 100644 --- a/fs/proc/inode.c +++ b/fs/proc/inode.c @@ -214,8 +214,7 @@ static long proc_reg_unlocked_ioctl(struct file *file, unsigned int cmd, unsigne { struct proc_dir_entry *pde = PDE(file->f_path.dentry->d_inode); long rv = -ENOTTY; - long (*unlocked_ioctl)(struct file *, unsigned int, unsigned long); - int (*ioctl)(struct inode *, struct file *, unsigned int, unsigned long); + long (*ioctl)(struct file *, unsigned int, unsigned long); spin_lock(&pde->pde_unload_lock); if (!pde->proc_fops) { @@ -223,19 +222,11 @@ static long proc_reg_unlocked_ioctl(struct file *file, unsigned int cmd, unsigne return rv; } pde->pde_users++; - unlocked_ioctl = pde->proc_fops->unlocked_ioctl; - ioctl = pde->proc_fops->ioctl; + ioctl = pde->proc_fops->unlocked_ioctl; spin_unlock(&pde->pde_unload_lock); - if (unlocked_ioctl) { - rv = unlocked_ioctl(file, cmd, arg); - if (rv == -ENOIOCTLCMD) - rv = -EINVAL; - } else if (ioctl) { - WARN_ONCE(1, "Procfs ioctl handlers must use unlocked_ioctl, " - "%pf will be called without the Bkl held\n", ioctl); - rv = ioctl(file->f_path.dentry->d_inode, file, cmd, arg); - } + if (ioctl) + rv = ioctl(file, cmd, arg); pde_users_dec(pde); return rv; diff --git a/fs/proc/page.c b/fs/proc/page.c index 180cf5a..3b8b456 100644 --- a/fs/proc/page.c +++ b/fs/proc/page.c @@ -146,7 +146,7 @@ u64 stable_page_flags(struct page *page) u |= kpf_copy_bit(k, KPF_HWPOISON, PG_hwpoison); #endif -#ifdef CONFIG_IA64_UNCACHED_ALLOCATOR +#ifdef CONFIG_ARCH_USES_PG_UNCACHED u |= kpf_copy_bit(k, KPF_UNCACHED, PG_uncached); #endif diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c index 5be436e..2fc5255 100644 --- a/fs/proc/proc_sysctl.c +++ b/fs/proc/proc_sysctl.c @@ -364,6 +364,7 @@ static int proc_sys_getattr(struct vfsmount *mnt, struct dentry *dentry, struct static const struct file_operations proc_sys_file_operations = { .read = proc_sys_read, .write = proc_sys_write, + .llseek = default_llseek, }; static const struct file_operations proc_sys_dir_file_operations = { diff --git a/fs/proc/root.c b/fs/proc/root.c index 4258384..93d99b3 100644 --- a/fs/proc/root.c +++ b/fs/proc/root.c @@ -179,6 +179,7 @@ static int proc_root_readdir(struct file * filp, static const struct file_operations proc_root_operations = { .read = generic_read_dir, .readdir = proc_root_readdir, + .llseek = default_llseek, }; /* diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c index aea1d3f..871e25e 100644 --- a/fs/proc/task_mmu.c +++ b/fs/proc/task_mmu.c @@ -210,6 +210,7 @@ static void show_map_vma(struct seq_file *m, struct vm_area_struct *vma) int flags = vma->vm_flags; unsigned long ino = 0; unsigned long long pgoff = 0; + unsigned long start; dev_t dev = 0; int len; @@ -220,8 +221,14 @@ static void show_map_vma(struct seq_file *m, struct vm_area_struct *vma) pgoff = ((loff_t)vma->vm_pgoff) << PAGE_SHIFT; } + /* We don't show the stack guard page in /proc/maps */ + start = vma->vm_start; + if (vma->vm_flags & VM_GROWSDOWN) + if (!vma_stack_continue(vma->vm_prev, vma->vm_start)) + start += PAGE_SIZE; + seq_printf(m, "%08lx-%08lx %c%c%c%c %08llx %02x:%02x %lu %n", - vma->vm_start, + start, vma->vm_end, flags & VM_READ ? 'r' : '-', flags & VM_WRITE ? 'w' : '-', @@ -356,13 +363,13 @@ static int smaps_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end, mss->referenced += PAGE_SIZE; mapcount = page_mapcount(page); if (mapcount >= 2) { - if (pte_dirty(ptent)) + if (pte_dirty(ptent) || PageDirty(page)) mss->shared_dirty += PAGE_SIZE; else mss->shared_clean += PAGE_SIZE; mss->pss += (PAGE_SIZE << PSS_SHIFT) / mapcount; } else { - if (pte_dirty(ptent)) + if (pte_dirty(ptent) || PageDirty(page)) mss->private_dirty += PAGE_SIZE; else mss->private_clean += PAGE_SIZE; @@ -532,6 +539,7 @@ static ssize_t clear_refs_write(struct file *file, const char __user *buf, const struct file_operations proc_clear_refs_operations = { .write = clear_refs_write, + .llseek = noop_llseek, }; struct pagemapread { diff --git a/fs/proc/vmcore.c b/fs/proc/vmcore.c index 91c817f..2367fb3 100644 --- a/fs/proc/vmcore.c +++ b/fs/proc/vmcore.c @@ -163,7 +163,7 @@ static ssize_t read_vmcore(struct file *file, char __user *buffer, static const struct file_operations proc_vmcore_operations = { .read = read_vmcore, - .llseek = generic_file_llseek, + .llseek = default_llseek, }; static struct vmcore* __init get_new_element(void) |