diff options
Diffstat (limited to 'fs/proc/proc_misc.c')
-rw-r--r-- | fs/proc/proc_misc.c | 135 |
1 files changed, 0 insertions, 135 deletions
diff --git a/fs/proc/proc_misc.c b/fs/proc/proc_misc.c index 5ed15ff8fd1..2ef9ef9bc8c 100644 --- a/fs/proc/proc_misc.c +++ b/fs/proc/proc_misc.c @@ -57,146 +57,11 @@ #include <asm/div64.h> #include "internal.h" -#ifdef CONFIG_PROC_PAGE_MONITOR -#define KPMSIZE sizeof(u64) -#define KPMMASK (KPMSIZE - 1) -/* /proc/kpagecount - an array exposing page counts - * - * Each entry is a u64 representing the corresponding - * physical page count. - */ -static ssize_t kpagecount_read(struct file *file, char __user *buf, - size_t count, loff_t *ppos) -{ - u64 __user *out = (u64 __user *)buf; - struct page *ppage; - unsigned long src = *ppos; - unsigned long pfn; - ssize_t ret = 0; - u64 pcount; - - pfn = src / KPMSIZE; - count = min_t(size_t, count, (max_pfn * KPMSIZE) - src); - if (src & KPMMASK || count & KPMMASK) - return -EINVAL; - - while (count > 0) { - ppage = NULL; - if (pfn_valid(pfn)) - ppage = pfn_to_page(pfn); - pfn++; - if (!ppage) - pcount = 0; - else - pcount = page_mapcount(ppage); - - if (put_user(pcount, out++)) { - ret = -EFAULT; - break; - } - - count -= KPMSIZE; - } - - *ppos += (char __user *)out - buf; - if (!ret) - ret = (char __user *)out - buf; - return ret; -} - -static struct file_operations proc_kpagecount_operations = { - .llseek = mem_lseek, - .read = kpagecount_read, -}; - -/* /proc/kpageflags - an array exposing page flags - * - * Each entry is a u64 representing the corresponding - * physical page flags. - */ - -/* These macros are used to decouple internal flags from exported ones */ - -#define KPF_LOCKED 0 -#define KPF_ERROR 1 -#define KPF_REFERENCED 2 -#define KPF_UPTODATE 3 -#define KPF_DIRTY 4 -#define KPF_LRU 5 -#define KPF_ACTIVE 6 -#define KPF_SLAB 7 -#define KPF_WRITEBACK 8 -#define KPF_RECLAIM 9 -#define KPF_BUDDY 10 - -#define kpf_copy_bit(flags, srcpos, dstpos) (((flags >> srcpos) & 1) << dstpos) - -static ssize_t kpageflags_read(struct file *file, char __user *buf, - size_t count, loff_t *ppos) -{ - u64 __user *out = (u64 __user *)buf; - struct page *ppage; - unsigned long src = *ppos; - unsigned long pfn; - ssize_t ret = 0; - u64 kflags, uflags; - - pfn = src / KPMSIZE; - count = min_t(unsigned long, count, (max_pfn * KPMSIZE) - src); - if (src & KPMMASK || count & KPMMASK) - return -EINVAL; - - while (count > 0) { - ppage = NULL; - if (pfn_valid(pfn)) - ppage = pfn_to_page(pfn); - pfn++; - if (!ppage) - kflags = 0; - else - kflags = ppage->flags; - - uflags = kpf_copy_bit(KPF_LOCKED, PG_locked, kflags) | - kpf_copy_bit(kflags, KPF_ERROR, PG_error) | - kpf_copy_bit(kflags, KPF_REFERENCED, PG_referenced) | - kpf_copy_bit(kflags, KPF_UPTODATE, PG_uptodate) | - kpf_copy_bit(kflags, KPF_DIRTY, PG_dirty) | - kpf_copy_bit(kflags, KPF_LRU, PG_lru) | - kpf_copy_bit(kflags, KPF_ACTIVE, PG_active) | - kpf_copy_bit(kflags, KPF_SLAB, PG_slab) | - kpf_copy_bit(kflags, KPF_WRITEBACK, PG_writeback) | - kpf_copy_bit(kflags, KPF_RECLAIM, PG_reclaim) | - kpf_copy_bit(kflags, KPF_BUDDY, PG_buddy); - - if (put_user(uflags, out++)) { - ret = -EFAULT; - break; - } - - count -= KPMSIZE; - } - - *ppos += (char __user *)out - buf; - if (!ret) - ret = (char __user *)out - buf; - return ret; -} - -static struct file_operations proc_kpageflags_operations = { - .llseek = mem_lseek, - .read = kpageflags_read, -}; -#endif /* CONFIG_PROC_PAGE_MONITOR */ - void __init proc_misc_init(void) { proc_symlink("mounts", NULL, "self/mounts"); /* And now for trickier ones */ -#ifdef CONFIG_PROC_PAGE_MONITOR - proc_create("kpagecount", S_IRUSR, NULL, &proc_kpagecount_operations); - proc_create("kpageflags", S_IRUSR, NULL, &proc_kpageflags_operations); -#endif #ifdef CONFIG_PROC_VMCORE proc_vmcore = proc_create("vmcore", S_IRUSR, NULL, &proc_vmcore_operations); #endif |