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authorLinus Torvalds <torvalds@linux-foundation.org>2013-07-03 17:12:13 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-07-03 17:12:13 -0700
commit7f0ef0267e20d62d45d527911a993b1e998f4968 (patch)
treede51abc7da5903f59d83e23937f22420164c9477 /fs
parent862f0012549110d6f2586bf54b52ed4540cbff3a (diff)
parent9307c29524502c21f0e8a6d96d850b2f5bc0bd9a (diff)
downloadop-kernel-dev-7f0ef0267e20d62d45d527911a993b1e998f4968.zip
op-kernel-dev-7f0ef0267e20d62d45d527911a993b1e998f4968.tar.gz
Merge branch 'akpm' (updates from Andrew Morton)
Merge first patch-bomb from Andrew Morton: - various misc bits - I'm been patchmonkeying ocfs2 for a while, as Joel and Mark have been distracted. There has been quite a bit of activity. - About half the MM queue - Some backlight bits - Various lib/ updates - checkpatch updates - zillions more little rtc patches - ptrace - signals - exec - procfs - rapidio - nbd - aoe - pps - memstick - tools/testing/selftests updates * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (445 commits) tools/testing/selftests: don't assume the x bit is set on scripts selftests: add .gitignore for kcmp selftests: fix clean target in kcmp Makefile selftests: add .gitignore for vm selftests: add hugetlbfstest self-test: fix make clean selftests: exit 1 on failure kernel/resource.c: remove the unneeded assignment in function __find_resource aio: fix wrong comment in aio_complete() drivers/w1/slaves/w1_ds2408.c: add magic sequence to disable P0 test mode drivers/memstick/host/r592.c: convert to module_pci_driver drivers/memstick/host/jmb38x_ms: convert to module_pci_driver pps-gpio: add device-tree binding and support drivers/pps/clients/pps-gpio.c: convert to module_platform_driver drivers/pps/clients/pps-gpio.c: convert to devm_* helpers drivers/parport/share.c: use kzalloc Documentation/accounting/getdelays.c: avoid strncpy in accounting tool aoe: update internal version number to v83 aoe: update copyright date aoe: perform I/O completions in parallel ...
Diffstat (limited to 'fs')
-rw-r--r--fs/aio.c2
-rw-r--r--fs/block_dev.c1
-rw-r--r--fs/buffer.c34
-rw-r--r--fs/cachefiles/rdwr.c30
-rw-r--r--fs/configfs/file.c2
-rw-r--r--fs/coredump.c121
-rw-r--r--fs/eventpoll.c12
-rw-r--r--fs/exec.c7
-rw-r--r--fs/ext3/inode.c1
-rw-r--r--fs/fat/misc.c5
-rw-r--r--fs/fuse/inode.c2
-rw-r--r--fs/hppfs/hppfs.c11
-rw-r--r--fs/lockd/svc.c2
-rw-r--r--fs/ncpfs/mmap.c2
-rw-r--r--fs/nfs/callback.c5
-rw-r--r--fs/nfs/dir.c7
-rw-r--r--fs/nfs/file.c30
-rw-r--r--fs/nfs/nfs4state.c2
-rw-r--r--fs/nilfs2/alloc.c63
-rw-r--r--fs/nilfs2/alloc.h2
-rw-r--r--fs/nilfs2/ifile.c22
-rw-r--r--fs/nilfs2/ifile.h2
-rw-r--r--fs/nilfs2/inode.c8
-rw-r--r--fs/nilfs2/segment.c4
-rw-r--r--fs/nilfs2/super.c31
-rw-r--r--fs/nilfs2/the_nilfs.c4
-rw-r--r--fs/nilfs2/the_nilfs.h4
-rw-r--r--fs/ocfs2/alloc.c8
-rw-r--r--fs/ocfs2/cluster/heartbeat.c19
-rw-r--r--fs/ocfs2/cluster/quorum.c2
-rw-r--r--fs/ocfs2/cluster/tcp.c29
-rw-r--r--fs/ocfs2/dlm/dlmlock.c1
-rw-r--r--fs/ocfs2/dlm/dlmrecovery.c7
-rw-r--r--fs/ocfs2/journal.h3
-rw-r--r--fs/ocfs2/namei.c70
-rw-r--r--fs/ocfs2/ocfs2.h1
-rw-r--r--fs/ocfs2/suballoc.c37
-rw-r--r--fs/ocfs2/super.c6
-rw-r--r--fs/ocfs2/xattr.c18
-rw-r--r--fs/proc/kcore.c2
-rw-r--r--fs/proc/task_mmu.c145
-rw-r--r--fs/proc/uptime.c3
-rw-r--r--fs/proc/vmcore.c694
43 files changed, 991 insertions, 470 deletions
diff --git a/fs/aio.c b/fs/aio.c
index a8ecc83..9b5ca11 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -625,7 +625,7 @@ void aio_complete(struct kiocb *iocb, long res, long res2)
/*
* Add a completion event to the ring buffer. Must be done holding
- * ctx->ctx_lock to prevent other code from messing with the tail
+ * ctx->completion_lock to prevent other code from messing with the tail
* pointer since we might be called from irq context.
*/
spin_lock_irqsave(&ctx->completion_lock, flags);
diff --git a/fs/block_dev.c b/fs/block_dev.c
index 431b6a0..bb43ce0 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -1562,6 +1562,7 @@ static const struct address_space_operations def_blk_aops = {
.writepages = generic_writepages,
.releasepage = blkdev_releasepage,
.direct_IO = blkdev_direct_IO,
+ .is_dirty_writeback = buffer_check_dirty_writeback,
};
const struct file_operations def_blk_fops = {
diff --git a/fs/buffer.c b/fs/buffer.c
index f93392e..4d74335 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -83,6 +83,40 @@ void unlock_buffer(struct buffer_head *bh)
EXPORT_SYMBOL(unlock_buffer);
/*
+ * Returns if the page has dirty or writeback buffers. If all the buffers
+ * are unlocked and clean then the PageDirty information is stale. If
+ * any of the pages are locked, it is assumed they are locked for IO.
+ */
+void buffer_check_dirty_writeback(struct page *page,
+ bool *dirty, bool *writeback)
+{
+ struct buffer_head *head, *bh;
+ *dirty = false;
+ *writeback = false;
+
+ BUG_ON(!PageLocked(page));
+
+ if (!page_has_buffers(page))
+ return;
+
+ if (PageWriteback(page))
+ *writeback = true;
+
+ head = page_buffers(page);
+ bh = head;
+ do {
+ if (buffer_locked(bh))
+ *writeback = true;
+
+ if (buffer_dirty(bh))
+ *dirty = true;
+
+ bh = bh->b_this_page;
+ } while (bh != head);
+}
+EXPORT_SYMBOL(buffer_check_dirty_writeback);
+
+/*
* Block until a buffer comes unlocked. This doesn't stop it
* from becoming locked again - you have to lock it yourself
* if you want to preserve its state.
diff --git a/fs/cachefiles/rdwr.c b/fs/cachefiles/rdwr.c
index 317f9ee..ebaff36 100644
--- a/fs/cachefiles/rdwr.c
+++ b/fs/cachefiles/rdwr.c
@@ -12,6 +12,7 @@
#include <linux/mount.h>
#include <linux/slab.h>
#include <linux/file.h>
+#include <linux/swap.h>
#include "internal.h"
/*
@@ -227,8 +228,7 @@ static void cachefiles_read_copier(struct fscache_operation *_op)
*/
static int cachefiles_read_backing_file_one(struct cachefiles_object *object,
struct fscache_retrieval *op,
- struct page *netpage,
- struct pagevec *pagevec)
+ struct page *netpage)
{
struct cachefiles_one_read *monitor;
struct address_space *bmapping;
@@ -237,8 +237,6 @@ static int cachefiles_read_backing_file_one(struct cachefiles_object *object,
_enter("");
- pagevec_reinit(pagevec);
-
_debug("read back %p{%lu,%d}",
netpage, netpage->index, page_count(netpage));
@@ -283,9 +281,7 @@ installed_new_backing_page:
backpage = newpage;
newpage = NULL;
- page_cache_get(backpage);
- pagevec_add(pagevec, backpage);
- __pagevec_lru_add_file(pagevec);
+ lru_cache_add_file(backpage);
read_backing_page:
ret = bmapping->a_ops->readpage(NULL, backpage);
@@ -452,8 +448,7 @@ int cachefiles_read_or_alloc_page(struct fscache_retrieval *op,
if (block) {
/* submit the apparently valid page to the backing fs to be
* read from disk */
- ret = cachefiles_read_backing_file_one(object, op, page,
- &pagevec);
+ ret = cachefiles_read_backing_file_one(object, op, page);
} else if (cachefiles_has_space(cache, 0, 1) == 0) {
/* there's space in the cache we can use */
fscache_mark_page_cached(op, page);
@@ -482,14 +477,11 @@ static int cachefiles_read_backing_file(struct cachefiles_object *object,
{
struct cachefiles_one_read *monitor = NULL;
struct address_space *bmapping = object->backer->d_inode->i_mapping;
- struct pagevec lru_pvec;
struct page *newpage = NULL, *netpage, *_n, *backpage = NULL;
int ret = 0;
_enter("");
- pagevec_init(&lru_pvec, 0);
-
list_for_each_entry_safe(netpage, _n, list, lru) {
list_del(&netpage->lru);
@@ -534,9 +526,7 @@ static int cachefiles_read_backing_file(struct cachefiles_object *object,
backpage = newpage;
newpage = NULL;
- page_cache_get(backpage);
- if (!pagevec_add(&lru_pvec, backpage))
- __pagevec_lru_add_file(&lru_pvec);
+ lru_cache_add_file(backpage);
reread_backing_page:
ret = bmapping->a_ops->readpage(NULL, backpage);
@@ -559,9 +549,7 @@ static int cachefiles_read_backing_file(struct cachefiles_object *object,
goto nomem;
}
- page_cache_get(netpage);
- if (!pagevec_add(&lru_pvec, netpage))
- __pagevec_lru_add_file(&lru_pvec);
+ lru_cache_add_file(netpage);
/* install a monitor */
page_cache_get(netpage);
@@ -643,9 +631,7 @@ static int cachefiles_read_backing_file(struct cachefiles_object *object,
fscache_mark_page_cached(op, netpage);
- page_cache_get(netpage);
- if (!pagevec_add(&lru_pvec, netpage))
- __pagevec_lru_add_file(&lru_pvec);
+ lru_cache_add_file(netpage);
/* the netpage is unlocked and marked up to date here */
fscache_end_io(op, netpage, 0);
@@ -661,8 +647,6 @@ static int cachefiles_read_backing_file(struct cachefiles_object *object,
out:
/* tidy up */
- pagevec_lru_add_file(&lru_pvec);
-
if (newpage)
page_cache_release(newpage);
if (netpage)
diff --git a/fs/configfs/file.c b/fs/configfs/file.c
index 2b6cb23..1d1c41f 100644
--- a/fs/configfs/file.c
+++ b/fs/configfs/file.c
@@ -203,7 +203,7 @@ configfs_write_file(struct file *file, const char __user *buf, size_t count, lof
mutex_lock(&buffer->mutex);
len = fill_write_buffer(buffer, buf, count);
if (len > 0)
- len = flush_write_buffer(file->f_path.dentry, buffer, count);
+ len = flush_write_buffer(file->f_path.dentry, buffer, len);
if (len > 0)
*ppos += len;
mutex_unlock(&buffer->mutex);
diff --git a/fs/coredump.c b/fs/coredump.c
index dafafba..72f816d 100644
--- a/fs/coredump.c
+++ b/fs/coredump.c
@@ -45,69 +45,79 @@
#include <trace/events/sched.h>
int core_uses_pid;
-char core_pattern[CORENAME_MAX_SIZE] = "core";
unsigned int core_pipe_limit;
+char core_pattern[CORENAME_MAX_SIZE] = "core";
+static int core_name_size = CORENAME_MAX_SIZE;
struct core_name {
char *corename;
int used, size;
};
-static atomic_t call_count = ATOMIC_INIT(1);
/* The maximal length of core_pattern is also specified in sysctl.c */
-static int expand_corename(struct core_name *cn)
+static int expand_corename(struct core_name *cn, int size)
{
- char *old_corename = cn->corename;
-
- cn->size = CORENAME_MAX_SIZE * atomic_inc_return(&call_count);
- cn->corename = krealloc(old_corename, cn->size, GFP_KERNEL);
+ char *corename = krealloc(cn->corename, size, GFP_KERNEL);
- if (!cn->corename) {
- kfree(old_corename);
+ if (!corename)
return -ENOMEM;
- }
+ if (size > core_name_size) /* racy but harmless */
+ core_name_size = size;
+
+ cn->size = ksize(corename);
+ cn->corename = corename;
return 0;
}
+static int cn_vprintf(struct core_name *cn, const char *fmt, va_list arg)
+{
+ int free, need;
+
+again:
+ free = cn->size - cn->used;
+ need = vsnprintf(cn->corename + cn->used, free, fmt, arg);
+ if (need < free) {
+ cn->used += need;
+ return 0;
+ }
+
+ if (!expand_corename(cn, cn->size + need - free + 1))
+ goto again;
+
+ return -ENOMEM;
+}
+
static int cn_printf(struct core_name *cn, const char *fmt, ...)
{
- char *cur;
- int need;
- int ret;
va_list arg;
+ int ret;
va_start(arg, fmt);
- need = vsnprintf(NULL, 0, fmt, arg);
+ ret = cn_vprintf(cn, fmt, arg);
va_end(arg);
- if (likely(need < cn->size - cn->used - 1))
- goto out_printf;
+ return ret;
+}
- ret = expand_corename(cn);
- if (ret)
- goto expand_fail;
+static int cn_esc_printf(struct core_name *cn, const char *fmt, ...)
+{
+ int cur = cn->used;
+ va_list arg;
+ int ret;
-out_printf:
- cur = cn->corename + cn->used;
va_start(arg, fmt);
- vsnprintf(cur, need + 1, fmt, arg);
+ ret = cn_vprintf(cn, fmt, arg);
va_end(arg);
- cn->used += need;
- return 0;
-expand_fail:
+ for (; cur < cn->used; ++cur) {
+ if (cn->corename[cur] == '/')
+ cn->corename[cur] = '!';
+ }
return ret;
}
-static void cn_escape(char *str)
-{
- for (; *str; str++)
- if (*str == '/')
- *str = '!';
-}
-
static int cn_print_exe_file(struct core_name *cn)
{
struct file *exe_file;
@@ -115,12 +125,8 @@ static int cn_print_exe_file(struct core_name *cn)
int ret;
exe_file = get_mm_exe_file(current->mm);
- if (!exe_file) {
- char *commstart = cn->corename + cn->used;
- ret = cn_printf(cn, "%s (path unknown)", current->comm);
- cn_escape(commstart);
- return ret;
- }
+ if (!exe_file)
+ return cn_esc_printf(cn, "%s (path unknown)", current->comm);
pathbuf = kmalloc(PATH_MAX, GFP_TEMPORARY);
if (!pathbuf) {
@@ -134,9 +140,7 @@ static int cn_print_exe_file(struct core_name *cn)
goto free_buf;
}
- cn_escape(path);
-
- ret = cn_printf(cn, "%s", path);
+ ret = cn_esc_printf(cn, "%s", path);
free_buf:
kfree(pathbuf);
@@ -157,19 +161,19 @@ static int format_corename(struct core_name *cn, struct coredump_params *cprm)
int pid_in_pattern = 0;
int err = 0;
- cn->size = CORENAME_MAX_SIZE * atomic_read(&call_count);
- cn->corename = kmalloc(cn->size, GFP_KERNEL);
cn->used = 0;
-
- if (!cn->corename)
+ cn->corename = NULL;
+ if (expand_corename(cn, core_name_size))
return -ENOMEM;
+ cn->corename[0] = '\0';
+
+ if (ispipe)
+ ++pat_ptr;
/* Repeat as long as we have more pattern to process and more output
space */
while (*pat_ptr) {
if (*pat_ptr != '%') {
- if (*pat_ptr == 0)
- goto out;
err = cn_printf(cn, "%c", *pat_ptr++);
} else {
switch (*++pat_ptr) {
@@ -210,22 +214,16 @@ static int format_corename(struct core_name *cn, struct coredump_params *cprm)
break;
}
/* hostname */
- case 'h': {
- char *namestart = cn->corename + cn->used;
+ case 'h':
down_read(&uts_sem);
- err = cn_printf(cn, "%s",
+ err = cn_esc_printf(cn, "%s",
utsname()->nodename);
up_read(&uts_sem);
- cn_escape(namestart);
break;
- }
/* executable */
- case 'e': {
- char *commstart = cn->corename + cn->used;
- err = cn_printf(cn, "%s", current->comm);
- cn_escape(commstart);
+ case 'e':
+ err = cn_esc_printf(cn, "%s", current->comm);
break;
- }
case 'E':
err = cn_print_exe_file(cn);
break;
@@ -244,6 +242,7 @@ static int format_corename(struct core_name *cn, struct coredump_params *cprm)
return err;
}
+out:
/* Backward compatibility with core_uses_pid:
*
* If core_pattern does not include a %p (as is the default)
@@ -254,7 +253,6 @@ static int format_corename(struct core_name *cn, struct coredump_params *cprm)
if (err)
return err;
}
-out:
return ispipe;
}
@@ -549,7 +547,7 @@ void do_coredump(siginfo_t *siginfo)
if (ispipe < 0) {
printk(KERN_WARNING "format_corename failed\n");
printk(KERN_WARNING "Aborting core\n");
- goto fail_corename;
+ goto fail_unlock;
}
if (cprm.limit == 1) {
@@ -584,7 +582,7 @@ void do_coredump(siginfo_t *siginfo)
goto fail_dropcount;
}
- helper_argv = argv_split(GFP_KERNEL, cn.corename+1, NULL);
+ helper_argv = argv_split(GFP_KERNEL, cn.corename, NULL);
if (!helper_argv) {
printk(KERN_WARNING "%s failed to allocate memory\n",
__func__);
@@ -601,7 +599,7 @@ void do_coredump(siginfo_t *siginfo)
argv_free(helper_argv);
if (retval) {
- printk(KERN_INFO "Core dump to %s pipe failed\n",
+ printk(KERN_INFO "Core dump to |%s pipe failed\n",
cn.corename);
goto close_fail;
}
@@ -669,7 +667,6 @@ fail_dropcount:
atomic_dec(&core_dump_count);
fail_unlock:
kfree(cn.corename);
-fail_corename:
coredump_finish(mm, core_dumped);
revert_creds(old_cred);
fail_creds:
diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index 0cff443..9ad17b15 100644
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -1977,8 +1977,8 @@ SYSCALL_DEFINE6(epoll_pwait, int, epfd, struct epoll_event __user *, events,
return -EINVAL;
if (copy_from_user(&ksigmask, sigmask, sizeof(ksigmask)))
return -EFAULT;
- sigdelsetmask(&ksigmask, sigmask(SIGKILL) | sigmask(SIGSTOP));
- sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
+ sigsaved = current->blocked;
+ set_current_blocked(&ksigmask);
}
error = sys_epoll_wait(epfd, events, maxevents, timeout);
@@ -1995,7 +1995,7 @@ SYSCALL_DEFINE6(epoll_pwait, int, epfd, struct epoll_event __user *, events,
sizeof(sigsaved));
set_restore_sigmask();
} else
- sigprocmask(SIG_SETMASK, &sigsaved, NULL);
+ set_current_blocked(&sigsaved);
}
return error;
@@ -2022,8 +2022,8 @@ COMPAT_SYSCALL_DEFINE6(epoll_pwait, int, epfd,
if (copy_from_user(&csigmask, sigmask, sizeof(csigmask)))
return -EFAULT;
sigset_from_compat(&ksigmask, &csigmask);
- sigdelsetmask(&ksigmask, sigmask(SIGKILL) | sigmask(SIGSTOP));
- sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
+ sigsaved = current->blocked;
+ set_current_blocked(&ksigmask);
}
err = sys_epoll_wait(epfd, events, maxevents, timeout);
@@ -2040,7 +2040,7 @@ COMPAT_SYSCALL_DEFINE6(epoll_pwait, int, epfd,
sizeof(sigsaved));
set_restore_sigmask();
} else
- sigprocmask(SIG_SETMASK, &sigsaved, NULL);
+ set_current_blocked(&sigsaved);
}
return err;
diff --git a/fs/exec.c b/fs/exec.c
index 03b907c..9c73def 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -932,6 +932,7 @@ static int de_thread(struct task_struct *tsk)
* also take its birthdate (always earlier than our own).
*/
tsk->start_time = leader->start_time;
+ tsk->real_start_time = leader->real_start_time;
BUG_ON(!same_thread_group(leader, tsk));
BUG_ON(has_group_leader_pid(tsk));
@@ -947,9 +948,8 @@ static int de_thread(struct task_struct *tsk)
* Note: The old leader also uses this pid until release_task
* is called. Odd but simple and correct.
*/
- detach_pid(tsk, PIDTYPE_PID);
tsk->pid = leader->pid;
- attach_pid(tsk, PIDTYPE_PID, task_pid(leader));
+ change_pid(tsk, PIDTYPE_PID, task_pid(leader));
transfer_pid(leader, tsk, PIDTYPE_PGID);
transfer_pid(leader, tsk, PIDTYPE_SID);
@@ -1465,7 +1465,6 @@ static int do_execve_common(const char *filename,
struct files_struct *displaced;
bool clear_in_exec;
int retval;
- const struct cred *cred = current_cred();
/*
* We move the actual failure in case of RLIMIT_NPROC excess from
@@ -1474,7 +1473,7 @@ static int do_execve_common(const char *filename,
* whether NPROC limit is still exceeded.
*/
if ((current->flags & PF_NPROC_EXCEEDED) &&
- atomic_read(&cred->user->processes) > rlimit(RLIMIT_NPROC)) {
+ atomic_read(&current_user()->processes) > rlimit(RLIMIT_NPROC)) {
retval = -EAGAIN;
goto out_ret;
}
diff --git a/fs/ext3/inode.c b/fs/ext3/inode.c
index f67668f..2bd8548 100644
--- a/fs/ext3/inode.c
+++ b/fs/ext3/inode.c
@@ -1985,6 +1985,7 @@ static const struct address_space_operations ext3_ordered_aops = {
.direct_IO = ext3_direct_IO,
.migratepage = buffer_migrate_page,
.is_partially_uptodate = block_is_partially_uptodate,
+ .is_dirty_writeback = buffer_check_dirty_writeback,
.error_remove_page = generic_error_remove_page,
};
diff --git a/fs/fat/misc.c b/fs/fat/misc.c
index 359d307..628e22a 100644
--- a/fs/fat/misc.c
+++ b/fs/fat/misc.c
@@ -30,7 +30,7 @@ void __fat_fs_error(struct super_block *sb, int report, const char *fmt, ...)
va_start(args, fmt);
vaf.fmt = fmt;
vaf.va = &args;
- printk(KERN_ERR "FAT-fs (%s): error, %pV\n", sb->s_id, &vaf);
+ fat_msg(sb, KERN_ERR, "error, %pV", &vaf);
va_end(args);
}
@@ -38,8 +38,7 @@ void __fat_fs_error(struct super_block *sb, int report, const char *fmt, ...)
panic("FAT-fs (%s): fs panic from previous error\n", sb->s_id);
else if (opts->errors == FAT_ERRORS_RO && !(sb->s_flags & MS_RDONLY)) {
sb->s_flags |= MS_RDONLY;
- printk(KERN_ERR "FAT-fs (%s): Filesystem has been "
- "set read-only\n", sb->s_id);
+ fat_msg(sb, KERN_ERR, "Filesystem has been set read-only");
}
}
EXPORT_SYMBOL_GPL(__fat_fs_error);
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index 9a0cdde..0b57859 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -785,7 +785,7 @@ static const struct super_operations fuse_super_operations = {
static void sanitize_global_limit(unsigned *limit)
{
if (*limit == 0)
- *limit = ((num_physpages << PAGE_SHIFT) >> 13) /
+ *limit = ((totalram_pages << PAGE_SHIFT) >> 13) /
sizeof(struct fuse_req);
if (*limit >= 1 << 16)
diff --git a/fs/hppfs/hppfs.c b/fs/hppfs/hppfs.c
index fc90ab1..4338ff3 100644
--- a/fs/hppfs/hppfs.c
+++ b/fs/hppfs/hppfs.c
@@ -69,7 +69,7 @@ static char *dentry_name(struct dentry *dentry, int extra)
struct dentry *parent;
char *root, *name;
const char *seg_name;
- int len, seg_len;
+ int len, seg_len, root_len;
len = 0;
parent = dentry;
@@ -81,7 +81,8 @@ static char *dentry_name(struct dentry *dentry, int extra)
}
root = "proc";
- len += strlen(root);
+ root_len = strlen(root);
+ len += root_len;
name = kmalloc(len + extra + 1, GFP_KERNEL);
if (name == NULL)
return NULL;
@@ -91,7 +92,7 @@ static char *dentry_name(struct dentry *dentry, int extra)
while (parent->d_parent != parent) {
if (is_pid(parent)) {
seg_name = "pid";
- seg_len = strlen("pid");
+ seg_len = strlen(seg_name);
}
else {
seg_name = parent->d_name.name;
@@ -100,10 +101,10 @@ static char *dentry_name(struct dentry *dentry, int extra)
len -= seg_len + 1;
name[len] = '/';
- strncpy(&name[len + 1], seg_name, seg_len);
+ memcpy(&name[len + 1], seg_name, seg_len);
parent = parent->d_parent;
}
- strncpy(name, root, strlen(root));
+ memcpy(name, root, root_len);
return name;
}
diff --git a/fs/lockd/svc.c b/fs/lockd/svc.c
index a2aa97d..10d6c41 100644
--- a/fs/lockd/svc.c
+++ b/fs/lockd/svc.c
@@ -305,7 +305,7 @@ static int lockd_start_svc(struct svc_serv *serv)
svc_sock_update_bufs(serv);
serv->sv_maxconn = nlm_max_connections;
- nlmsvc_task = kthread_run(lockd, nlmsvc_rqst, serv->sv_name);
+ nlmsvc_task = kthread_run(lockd, nlmsvc_rqst, "%s", serv->sv_name);
if (IS_ERR(nlmsvc_task)) {
error = PTR_ERR(nlmsvc_task);
printk(KERN_WARNING
diff --git a/fs/ncpfs/mmap.c b/fs/ncpfs/mmap.c
index ee24df5..3c5dd55 100644
--- a/fs/ncpfs/mmap.c
+++ b/fs/ncpfs/mmap.c
@@ -117,7 +117,7 @@ int ncp_mmap(struct file *file, struct vm_area_struct *vma)
return -EINVAL;
/* we do not support files bigger than 4GB... We eventually
supports just 4GB... */
- if (((vma->vm_end - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff
+ if (vma_pages(vma) + vma->vm_pgoff
> (1U << (32 - PAGE_SHIFT)))
return -EFBIG;
diff --git a/fs/nfs/callback.c b/fs/nfs/callback.c
index cff089a..da6a43d 100644
--- a/fs/nfs/callback.c
+++ b/fs/nfs/callback.c
@@ -211,7 +211,6 @@ static int nfs_callback_start_svc(int minorversion, struct rpc_xprt *xprt,
struct svc_rqst *rqstp;
int (*callback_svc)(void *vrqstp);
struct nfs_callback_data *cb_info = &nfs_callback_info[minorversion];
- char svc_name[12];
int ret;
nfs_callback_bc_serv(minorversion, xprt, serv);
@@ -235,10 +234,10 @@ static int nfs_callback_start_svc(int minorversion, struct rpc_xprt *xprt,
svc_sock_update_bufs(serv);
- sprintf(svc_name, "nfsv4.%u-svc", minorversion);
cb_info->serv = serv;
cb_info->rqst = rqstp;
- cb_info->task = kthread_run(callback_svc, cb_info->rqst, svc_name);
+ cb_info->task = kthread_run(callback_svc, cb_info->rqst,
+ "nfsv4.%u-svc", minorversion);
if (IS_ERR(cb_info->task)) {
ret = PTR_ERR(cb_info->task);
svc_exit_thread(cb_info->rqst);
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 5d05141..d7ed697 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -33,6 +33,7 @@
#include <linux/pagevec.h>
#include <linux/namei.h>
#include <linux/mount.h>
+#include <linux/swap.h>
#include <linux/sched.h>
#include <linux/kmemleak.h>
#include <linux/xattr.h>
@@ -1758,7 +1759,6 @@ EXPORT_SYMBOL_GPL(nfs_unlink);
*/
int nfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
{
- struct pagevec lru_pvec;
struct page *page;
char *kaddr;
struct iattr attr;
@@ -1798,11 +1798,8 @@ int nfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
* No big deal if we can't add this page to the page cache here.
* READLINK will get the missing page from the server if needed.
*/
- pagevec_init(&lru_pvec, 0);
- if (!add_to_page_cache(page, dentry->d_inode->i_mapping, 0,
+ if (!add_to_page_cache_lru(page, dentry->d_inode->i_mapping, 0,
GFP_KERNEL)) {
- pagevec_add(&lru_pvec, page);
- pagevec_lru_add_file(&lru_pvec);
SetPageUptodate(page);
unlock_page(page);
} else
diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index 6b4a79f..94e94bd 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -495,6 +495,35 @@ static int nfs_release_page(struct page *page, gfp_t gfp)
return nfs_fscache_release_page(page, gfp);
}
+static void nfs_check_dirty_writeback(struct page *page,
+ bool *dirty, bool *writeback)
+{
+ struct nfs_inode *nfsi;
+ struct address_space *mapping = page_file_mapping(page);
+
+ if (!mapping || PageSwapCache(page))
+ return;
+
+ /*
+ * Check if an unstable page is currently being committed and
+ * if so, have the VM treat it as if the page is under writeback
+ * so it will not block due to pages that will shortly be freeable.
+ */
+ nfsi = NFS_I(mapping->host);
+ if (test_bit(NFS_INO_COMMIT, &nfsi->flags)) {
+ *writeback = true;
+ return;
+ }
+
+ /*
+ * If PagePrivate() is set, then the page is not freeable and as the
+ * inode is not being committed, it's not going to be cleaned in the
+ * near future so treat it as dirty
+ */
+ if (PagePrivate(page))
+ *dirty = true;
+}
+
/*
* Attempt to clear the private state associated with a page when an error
* occurs that requires the cached contents of an inode to be written back or
@@ -542,6 +571,7 @@ const struct address_space_operations nfs_file_aops = {
.direct_IO = nfs_direct_IO,
.migratepage = nfs_migrate_page,
.launder_page = nfs_launder_page,
+ .is_dirty_writeback = nfs_check_dirty_writeback,
.error_remove_page = generic_error_remove_page,
#ifdef CONFIG_NFS_SWAP
.swap_activate = nfs_swap_activate,
diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index ff10b4a..5541881 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -1194,7 +1194,7 @@ void nfs4_schedule_state_manager(struct nfs_client *clp)
snprintf(buf, sizeof(buf), "%s-manager",
rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR));
rcu_read_unlock();
- task = kthread_run(nfs4_run_state_manager, clp, buf);
+ task = kthread_run(nfs4_run_state_manager, clp, "%s", buf);
if (IS_ERR(task)) {
printk(KERN_ERR "%s: kthread_run: %ld\n",
__func__, PTR_ERR(task));
diff --git a/fs/nilfs2/alloc.c b/fs/nilfs2/alloc.c
index eed4d7b..741fd02 100644
--- a/fs/nilfs2/alloc.c
+++ b/fs/nilfs2/alloc.c
@@ -398,6 +398,69 @@ nilfs_palloc_rest_groups_in_desc_block(const struct inode *inode,
}
/**
+ * nilfs_palloc_count_desc_blocks - count descriptor blocks number
+ * @inode: inode of metadata file using this allocator
+ * @desc_blocks: descriptor blocks number [out]
+ */
+static int nilfs_palloc_count_desc_blocks(struct inode *inode,
+ unsigned long *desc_blocks)
+{
+ unsigned long blknum;
+ int ret;
+
+ ret = nilfs_bmap_last_key(NILFS_I(inode)->i_bmap, &blknum);
+ if (likely(!ret))
+ *desc_blocks = DIV_ROUND_UP(
+ blknum, NILFS_MDT(inode)->mi_blocks_per_desc_block);
+ return ret;
+}
+
+/**
+ * nilfs_palloc_mdt_file_can_grow - check potential opportunity for
+ * MDT file growing
+ * @inode: inode of metadata file using this allocator
+ * @desc_blocks: known current descriptor blocks count
+ */
+static inline bool nilfs_palloc_mdt_file_can_grow(struct inode *inode,
+ unsigned long desc_blocks)
+{
+ return (nilfs_palloc_groups_per_desc_block(inode) * desc_blocks) <
+ nilfs_palloc_groups_count(inode);
+}
+
+/**
+ * nilfs_palloc_count_max_entries - count max number of entries that can be
+ * described by descriptor blocks count
+ * @inode: inode of metadata file using this allocator
+ * @nused: current number of used entries
+ * @nmaxp: max number of entries [out]
+ */
+int nilfs_palloc_count_max_entries(struct inode *inode, u64 nused, u64 *nmaxp)
+{
+ unsigned long desc_blocks = 0;
+ u64 entries_per_desc_block, nmax;
+ int err;
+
+ err = nilfs_palloc_count_desc_blocks(inode, &desc_blocks);
+ if (unlikely(err))
+ return err;
+
+ entries_per_desc_block = (u64)nilfs_palloc_entries_per_group(inode) *
+ nilfs_palloc_groups_per_desc_block(inode);
+ nmax = entries_per_desc_block * desc_blocks;
+
+ if (nused == nmax &&
+ nilfs_palloc_mdt_file_can_grow(inode, desc_blocks))
+ nmax += entries_per_desc_block;
+
+ if (nused > nmax)
+ return -ERANGE;
+
+ *nmaxp = nmax;
+ return 0;
+}
+
+/**
* nilfs_palloc_prepare_alloc_entry - prepare to allocate a persistent object
* @inode: inode of metadata file using this allocator
* @req: nilfs_palloc_req structure exchanged for the allocation
diff --git a/fs/nilfs2/alloc.h b/fs/nilfs2/alloc.h
index fb72381..4bd6451 100644
--- a/fs/nilfs2/alloc.h
+++ b/fs/nilfs2/alloc.h
@@ -48,6 +48,8 @@ int nilfs_palloc_get_entry_block(struct inode *, __u64, int,
void *nilfs_palloc_block_get_entry(const struct inode *, __u64,
const struct buffer_head *, void *);
+int nilfs_palloc_count_max_entries(struct inode *, u64, u64 *);
+
/**
* nilfs_palloc_req - persistent allocator request and reply
* @pr_entry_nr: entry number (vblocknr or inode number)
diff --git a/fs/nilfs2/ifile.c b/fs/nilfs2/ifile.c
index d8e65bd..6548c78 100644
--- a/fs/nilfs2/ifile.c
+++ b/fs/nilfs2/ifile.c
@@ -160,6 +160,28 @@ int nilfs_ifile_get_inode_block(struct inode *ifile, ino_t ino,
}
/**
+ * nilfs_ifile_count_free_inodes - calculate free inodes count
+ * @ifile: ifile inode
+ * @nmaxinodes: current maximum of available inodes count [out]
+ * @nfreeinodes: free inodes count [out]
+ */
+int nilfs_ifile_count_free_inodes(struct inode *ifile,
+ u64 *nmaxinodes, u64 *nfreeinodes)
+{
+ u64 nused;
+ int err;
+
+ *nmaxinodes = 0;
+ *nfreeinodes = 0;
+
+ nused = atomic64_read(&NILFS_I(ifile)->i_root->inodes_count);
+ err = nilfs_palloc_count_max_entries(ifile, nused, nmaxinodes);
+ if (likely(!err))
+ *nfreeinodes = *nmaxinodes - nused;
+ return err;
+}
+
+/**
* nilfs_ifile_read - read or get ifile inode
* @sb: super block instance
* @root: root object
diff --git a/fs/nilfs2/ifile.h b/fs/nilfs2/ifile.h
index 59b6f2b..679674d 100644
--- a/fs/nilfs2/ifile.h
+++ b/fs/nilfs2/ifile.h
@@ -49,6 +49,8 @@ int nilfs_ifile_create_inode(struct inode *, ino_t *, struct buffer_head **);
int nilfs_ifile_delete_inode(struct inode *, ino_t);
int nilfs_ifile_get_inode_block(struct inode *, ino_t, struct buffer_head **);
+int nilfs_ifile_count_free_inodes(struct inode *, u64 *, u64 *);
+
int nilfs_ifile_read(struct super_block *sb, struct nilfs_root *root,
size_t inode_size, struct nilfs_inode *raw_inode,
struct inode **inodep);
diff --git a/fs/nilfs2/inode.c b/fs/nilfs2/inode.c
index bccfec8..b1a5277 100644
--- a/fs/nilfs2/inode.c
+++ b/fs/nilfs2/inode.c
@@ -54,7 +54,7 @@ void nilfs_inode_add_blocks(struct inode *inode, int n)
inode_add_bytes(inode, (1 << inode->i_blkbits) * n);
if (root)
- atomic_add(n, &root->blocks_count);
+ atomic64_add(n, &root->blocks_count);
}
void nilfs_inode_sub_blocks(struct inode *inode, int n)
@@ -63,7 +63,7 @@ void nilfs_inode_sub_blocks(struct inode *inode, int n)
inode_sub_bytes(inode, (1 << inode->i_blkbits) * n);
if (root)
- atomic_sub(n, &root->blocks_count);
+ atomic64_sub(n, &root->blocks_count);
}
/**
@@ -369,7 +369,7 @@ struct inode *nilfs_new_inode(struct inode *dir, umode_t mode)
goto failed_ifile_create_inode;
/* reference count of i_bh inherits from nilfs_mdt_read_block() */
- atomic_inc(&root->inodes_count);
+ atomic64_inc(&root->inodes_count);
inode_init_owner(inode, dir, mode);
inode->i_ino = ino;
inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
@@ -801,7 +801,7 @@ void nilfs_evict_inode(struct inode *inode)
ret = nilfs_ifile_delete_inode(ii->i_root->ifile, inode->i_ino);
if (!ret)
- atomic_dec(&ii->i_root->inodes_count);
+ atomic64_dec(&ii->i_root->inodes_count);
nilfs_clear_inode(inode);
diff --git a/fs/nilfs2/segment.c b/fs/nilfs2/segment.c
index a5752a58..bd88a74 100644
--- a/fs/nilfs2/segment.c
+++ b/fs/nilfs2/segment.c
@@ -835,9 +835,9 @@ static int nilfs_segctor_fill_in_checkpoint(struct nilfs_sc_info *sci)
raw_cp->cp_snapshot_list.ssl_next = 0;
raw_cp->cp_snapshot_list.ssl_prev = 0;
raw_cp->cp_inodes_count =
- cpu_to_le64(atomic_read(&sci->sc_root->inodes_count));
+ cpu_to_le64(atomic64_read(&sci->sc_root->inodes_count));
raw_cp->cp_blocks_count =
- cpu_to_le64(atomic_read(&sci->sc_root->blocks_count));
+ cpu_to_le64(atomic64_read(&sci->sc_root->blocks_count));
raw_cp->cp_nblk_inc =
cpu_to_le64(sci->sc_nblk_inc + sci->sc_nblk_this_inc);
raw_cp->cp_create = cpu_to_le64(sci->sc_seg_ctime);
diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c
index c7d1f9f..1427de5 100644
--- a/fs/nilfs2/super.c
+++ b/fs/nilfs2/super.c
@@ -554,8 +554,10 @@ int nilfs_attach_checkpoint(struct super_block *sb, __u64 cno, int curr_mnt,
if (err)
goto failed_bh;
- atomic_set(&root->inodes_count, le64_to_cpu(raw_cp->cp_inodes_count));
- atomic_set(&root->blocks_count, le64_to_cpu(raw_cp->cp_blocks_count));
+ atomic64_set(&root->inodes_count,
+ le64_to_cpu(raw_cp->cp_inodes_count));
+ atomic64_set(&root->blocks_count,
+ le64_to_cpu(raw_cp->cp_blocks_count));
nilfs_cpfile_put_checkpoint(nilfs->ns_cpfile, cno, bh_cp);
@@ -609,6 +611,7 @@ static int nilfs_statfs(struct dentry *dentry, struct kstatfs *buf)
unsigned long overhead;
unsigned long nrsvblocks;
sector_t nfreeblocks;
+ u64 nmaxinodes, nfreeinodes;
int err;
/*
@@ -633,14 +636,34 @@ static int nilfs_statfs(struct dentry *dentry, struct kstatfs *buf)
if (unlikely(err))
return err;
+ err = nilfs_ifile_count_free_inodes(root->ifile,
+ &nmaxinodes, &nfreeinodes);
+ if (unlikely(err)) {
+ printk(KERN_WARNING
+ "NILFS warning: fail to count free inodes: err %d.\n",
+ err);
+ if (err == -ERANGE) {
+ /*
+ * If nilfs_palloc_count_max_entries() returns
+ * -ERANGE error code then we simply treat
+ * curent inodes count as maximum possible and
+ * zero as free inodes value.
+ */
+ nmaxinodes = atomic64_read(&root->inodes_count);
+ nfreeinodes = 0;
+ err = 0;
+ } else
+ return err;
+ }
+
buf->f_type = NILFS_SUPER_MAGIC;
buf->f_bsize = sb->s_blocksize;
buf->f_blocks = blocks - overhead;
buf->f_bfree = nfreeblocks;
buf->f_bavail = (buf->f_bfree >= nrsvblocks) ?
(buf->f_bfree - nrsvblocks) : 0;
- buf->f_files = atomic_read(&root->inodes_count);
- buf->f_ffree = 0; /* nilfs_count_free_inodes(sb); */
+ buf->f_files = nmaxinodes;
+ buf->f_ffree = nfreeinodes;
buf->f_namelen = NILFS_NAME_LEN;
buf->f_fsid.val[0] = (u32)id;
buf->f_fsid.val[1] = (u32)(id >> 32);
diff --git a/fs/nilfs2/the_nilfs.c b/fs/nilfs2/the_nilfs.c
index 41e6a04..94c451c 100644
--- a/fs/nilfs2/the_nilfs.c
+++ b/fs/nilfs2/the_nilfs.c
@@ -764,8 +764,8 @@ nilfs_find_or_create_root(struct the_nilfs *nilfs, __u64 cno)
new->ifile = NULL;
new->nilfs = nilfs;
atomic_set(&new->count, 1);
- atomic_set(&new->inodes_count, 0);
- atomic_set(&new->blocks_count, 0);
+ atomic64_set(&new->inodes_count, 0);
+ atomic64_set(&new->blocks_count, 0);
rb_link_node(&new->rb_node, parent, p);
rb_insert_color(&new->rb_node, &nilfs->ns_cptree);
diff --git a/fs/nilfs2/the_nilfs.h b/fs/nilfs2/the_nilfs.h
index be1267a..de8cc53 100644
--- a/fs/nilfs2/the_nilfs.h
+++ b/fs/nilfs2/the_nilfs.h
@@ -241,8 +241,8 @@ struct nilfs_root {
struct the_nilfs *nilfs;
struct inode *ifile;
- atomic_t inodes_count;
- atomic_t blocks_count;
+ atomic64_t inodes_count;
+ atomic64_t blocks_count;
};
/* Special checkpoint number */
diff --git a/fs/ocfs2/alloc.c b/fs/ocfs2/alloc.c
index b8a9d87..17e6bdd 100644
--- a/fs/ocfs2/alloc.c
+++ b/fs/ocfs2/alloc.c
@@ -5655,7 +5655,7 @@ int ocfs2_remove_btree_range(struct inode *inode,
&ref_tree, NULL);
if (ret) {
mlog_errno(ret);
- goto out;
+ goto bail;
}
ret = ocfs2_prepare_refcount_change_for_del(inode,
@@ -5666,7 +5666,7 @@ int ocfs2_remove_btree_range(struct inode *inode,
&extra_blocks);
if (ret < 0) {
mlog_errno(ret);
- goto out;
+ goto bail;
}
}
@@ -5674,7 +5674,7 @@ int ocfs2_remove_btree_range(struct inode *inode,
extra_blocks);
if (ret) {
mlog_errno(ret);
- return ret;
+ goto bail;
}
mutex_lock(&tl_inode->i_mutex);
@@ -5734,7 +5734,7 @@ out_commit:
ocfs2_commit_trans(osb, handle);
out:
mutex_unlock(&tl_inode->i_mutex);
-
+bail:
if (meta_ac)
ocfs2_free_alloc_context(meta_ac);
diff --git a/fs/ocfs2/cluster/heartbeat.c b/fs/ocfs2/cluster/heartbeat.c
index 42252bf..5c1c864 100644
--- a/fs/ocfs2/cluster/heartbeat.c
+++ b/fs/ocfs2/cluster/heartbeat.c
@@ -176,7 +176,7 @@ static void o2hb_dead_threshold_set(unsigned int threshold)
}
}
-static int o2hb_global_hearbeat_mode_set(unsigned int hb_mode)
+static int o2hb_global_heartbeat_mode_set(unsigned int hb_mode)
{
int ret = -1;
@@ -500,7 +500,7 @@ static int o2hb_issue_node_write(struct o2hb_region *reg,
}
atomic_inc(&write_wc->wc_num_reqs);
- submit_bio(WRITE, bio);
+ submit_bio(WRITE_SYNC, bio);
status = 0;
bail:
@@ -2271,7 +2271,7 @@ ssize_t o2hb_heartbeat_group_mode_store(struct o2hb_heartbeat_group *group,
if (strnicmp(page, o2hb_heartbeat_mode_desc[i], len))
continue;
- ret = o2hb_global_hearbeat_mode_set(i);
+ ret = o2hb_global_heartbeat_mode_set(i);
if (!ret)
printk(KERN_NOTICE "o2hb: Heartbeat mode set to %s\n",
o2hb_heartbeat_mode_desc[i]);
@@ -2304,7 +2304,7 @@ static struct configfs_attribute *o2hb_heartbeat_group_attrs[] = {
NULL,
};
-static struct configfs_item_operations o2hb_hearbeat_group_item_ops = {
+static struct configfs_item_operations o2hb_heartbeat_group_item_ops = {
.show_attribute = o2hb_heartbeat_group_show,
.store_attribute = o2hb_heartbeat_group_store,
};
@@ -2316,7 +2316,7 @@ static struct configfs_group_operations o2hb_heartbeat_group_group_ops = {
static struct config_item_type o2hb_heartbeat_group_type = {
.ct_group_ops = &o2hb_heartbeat_group_group_ops,
- .ct_item_ops = &o2hb_hearbeat_group_item_ops,
+ .ct_item_ops = &o2hb_heartbeat_group_item_ops,
.ct_attrs = o2hb_heartbeat_group_attrs,
.ct_owner = THIS_MODULE,
};
@@ -2389,6 +2389,9 @@ static int o2hb_region_pin(const char *region_uuid)
assert_spin_locked(&o2hb_live_lock);
list_for_each_entry(reg, &o2hb_all_regions, hr_all_item) {
+ if (reg->hr_item_dropped)
+ continue;
+
uuid = config_item_name(&reg->hr_item);
/* local heartbeat */
@@ -2439,6 +2442,9 @@ static void o2hb_region_unpin(const char *region_uuid)
assert_spin_locked(&o2hb_live_lock);
list_for_each_entry(reg, &o2hb_all_regions, hr_all_item) {
+ if (reg->hr_item_dropped)
+ continue;
+
uuid = config_item_name(&reg->hr_item);
if (region_uuid) {
if (strcmp(region_uuid, uuid))
@@ -2654,6 +2660,9 @@ int o2hb_get_all_regions(char *region_uuids, u8 max_regions)
p = region_uuids;
list_for_each_entry(reg, &o2hb_all_regions, hr_all_item) {
+ if (reg->hr_item_dropped)
+ continue;
+
mlog(0, "Region: %s\n", config_item_name(&reg->hr_item));
if (numregs < max_regions) {
memcpy(p, config_item_name(&reg->hr_item),
diff --git a/fs/ocfs2/cluster/quorum.c b/fs/ocfs2/cluster/quorum.c
index c19897d..1ec141e 100644
--- a/fs/ocfs2/cluster/quorum.c
+++ b/fs/ocfs2/cluster/quorum.c
@@ -264,7 +264,7 @@ void o2quo_hb_still_up(u8 node)
/* This is analogous to hb_up. as a node's connection comes up we delay the
* quorum decision until we see it heartbeating. the hold will be droped in
* hb_up or hb_down. it might be perpetuated by con_err until hb_down. if
- * it's already heartbeating we we might be dropping a hold that conn_up got.
+ * it's already heartbeating we might be dropping a hold that conn_up got.
* */
void o2quo_conn_up(u8 node)
{
diff --git a/fs/ocfs2/cluster/tcp.c b/fs/ocfs2/cluster/tcp.c
index aa88bd8..d644dc6 100644
--- a/fs/ocfs2/cluster/tcp.c
+++ b/fs/ocfs2/cluster/tcp.c
@@ -406,6 +406,9 @@ static void sc_kref_release(struct kref *kref)
sc->sc_node = NULL;
o2net_debug_del_sc(sc);
+
+ if (sc->sc_page)
+ __free_page(sc->sc_page);
kfree(sc);
}
@@ -630,19 +633,19 @@ static void o2net_state_change(struct sock *sk)
state_change = sc->sc_state_change;
switch(sk->sk_state) {
- /* ignore connecting sockets as they make progress */
- case TCP_SYN_SENT:
- case TCP_SYN_RECV:
- break;
- case TCP_ESTABLISHED:
- o2net_sc_queue_work(sc, &sc->sc_connect_work);
- break;
- default:
- printk(KERN_INFO "o2net: Connection to " SC_NODEF_FMT
- " shutdown, state %d\n",
- SC_NODEF_ARGS(sc), sk->sk_state);
- o2net_sc_queue_work(sc, &sc->sc_shutdown_work);
- break;
+ /* ignore connecting sockets as they make progress */
+ case TCP_SYN_SENT:
+ case TCP_SYN_RECV:
+ break;
+ case TCP_ESTABLISHED:
+ o2net_sc_queue_work(sc, &sc->sc_connect_work);
+ break;
+ default:
+ printk(KERN_INFO "o2net: Connection to " SC_NODEF_FMT
+ " shutdown, state %d\n",
+ SC_NODEF_ARGS(sc), sk->sk_state);
+ o2net_sc_queue_work(sc, &sc->sc_shutdown_work);
+ break;
}
out:
read_unlock(&sk->sk_callback_lock);
diff --git a/fs/ocfs2/dlm/dlmlock.c b/fs/ocfs2/dlm/dlmlock.c
index 975810b..47e67c2 100644
--- a/fs/ocfs2/dlm/dlmlock.c
+++ b/fs/ocfs2/dlm/dlmlock.c
@@ -178,6 +178,7 @@ static enum dlm_status dlmlock_master(struct dlm_ctxt *dlm,
lock->ml.node);
}
} else {
+ status = DLM_NORMAL;
dlm_lock_get(lock);
list_add_tail(&lock->list, &res->blocked);
kick_thread = 1;
diff --git a/fs/ocfs2/dlm/dlmrecovery.c b/fs/ocfs2/dlm/dlmrecovery.c
index e68588e..773bd32 100644
--- a/fs/ocfs2/dlm/dlmrecovery.c
+++ b/fs/ocfs2/dlm/dlmrecovery.c
@@ -55,9 +55,6 @@
static void dlm_do_local_recovery_cleanup(struct dlm_ctxt *dlm, u8 dead_node);
static int dlm_recovery_thread(void *data);
-void dlm_complete_recovery_thread(struct dlm_ctxt *dlm);
-int dlm_launch_recovery_thread(struct dlm_ctxt *dlm);
-void dlm_kick_recovery_thread(struct dlm_ctxt *dlm);
static int dlm_do_recovery(struct dlm_ctxt *dlm);
static int dlm_pick_recovery_master(struct dlm_ctxt *dlm);
@@ -789,7 +786,7 @@ static int dlm_request_all_locks(struct dlm_ctxt *dlm, u8 request_from,
u8 dead_node)
{
struct dlm_lock_request lr;
- enum dlm_status ret;
+ int ret;
mlog(0, "\n");
@@ -802,7 +799,6 @@ static int dlm_request_all_locks(struct dlm_ctxt *dlm, u8 request_from,
lr.dead_node = dead_node;
// send message
- ret = DLM_NOLOCKMGR;
ret = o2net_send_message(DLM_LOCK_REQUEST_MSG, dlm->key,
&lr, sizeof(lr), request_from, NULL);
@@ -2696,6 +2692,7 @@ int dlm_begin_reco_handler(struct o2net_msg *msg, u32 len, void *data,
dlm->name, br->node_idx, br->dead_node,
dlm->reco.dead_node, dlm->reco.new_master);
spin_unlock(&dlm->spinlock);
+ dlm_put(dlm);
return -EAGAIN;
}
spin_unlock(&dlm->spinlock);
diff --git a/fs/ocfs2/journal.h b/fs/ocfs2/journal.h
index a3385b6..96f9ac2 100644
--- a/fs/ocfs2/journal.h
+++ b/fs/ocfs2/journal.h
@@ -200,7 +200,6 @@ void ocfs2_complete_quota_recovery(struct ocfs2_super *osb);
static inline void ocfs2_start_checkpoint(struct ocfs2_super *osb)
{
- atomic_set(&osb->needs_checkpoint, 1);
wake_up(&osb->checkpoint_event);
}
@@ -538,7 +537,7 @@ static inline int ocfs2_calc_extend_credits(struct super_block *sb,
extent_blocks = 1 + 1 + le16_to_cpu(root_el->l_tree_depth);
return bitmap_blocks + sysfile_bitmap_blocks + extent_blocks +
- ocfs2_quota_trans_credits(sb);
+ ocfs2_quota_trans_credits(sb) + bits_wanted;
}
static inline int ocfs2_calc_symlink_credits(struct super_block *sb)
diff --git a/fs/ocfs2/namei.c b/fs/ocfs2/namei.c
index b4a5cdf..be3f867 100644
--- a/fs/ocfs2/namei.c
+++ b/fs/ocfs2/namei.c
@@ -522,7 +522,7 @@ static int __ocfs2_mknod_locked(struct inode *dir,
fe->i_last_eb_blk = 0;
strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
- le32_add_cpu(&fe->i_flags, OCFS2_VALID_FL);
+ fe->i_flags |= cpu_to_le32(OCFS2_VALID_FL);
fe->i_atime = fe->i_ctime = fe->i_mtime =
cpu_to_le64(CURRENT_TIME.tv_sec);
fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
@@ -773,7 +773,7 @@ static int ocfs2_remote_dentry_delete(struct dentry *dentry)
return ret;
}
-static inline int inode_is_unlinkable(struct inode *inode)
+static inline int ocfs2_inode_is_unlinkable(struct inode *inode)
{
if (S_ISDIR(inode->i_mode)) {
if (inode->i_nlink == 2)
@@ -791,6 +791,7 @@ static int ocfs2_unlink(struct inode *dir,
{
int status;
int child_locked = 0;
+ bool is_unlinkable = false;
struct inode *inode = dentry->d_inode;
struct inode *orphan_dir = NULL;
struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
@@ -865,7 +866,7 @@ static int ocfs2_unlink(struct inode *dir,
goto leave;
}
- if (inode_is_unlinkable(inode)) {
+ if (ocfs2_inode_is_unlinkable(inode)) {
status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
OCFS2_I(inode)->ip_blkno,
orphan_name, &orphan_insert);
@@ -873,6 +874,7 @@ static int ocfs2_unlink(struct inode *dir,
mlog_errno(status);
goto leave;
}
+ is_unlinkable = true;
}
handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb));
@@ -892,15 +894,6 @@ static int ocfs2_unlink(struct inode *dir,
fe = (struct ocfs2_dinode *) fe_bh->b_data;
- if (inode_is_unlinkable(inode)) {
- status = ocfs2_orphan_add(osb, handle, inode, fe_bh, orphan_name,
- &orphan_insert, orphan_dir);
- if (status < 0) {
- mlog_errno(status);
- goto leave;
- }
- }
-
/* delete the name from the parent dir */
status = ocfs2_delete_entry(handle, dir, &lookup);
if (status < 0) {
@@ -923,6 +916,14 @@ static int ocfs2_unlink(struct inode *dir,
mlog_errno(status);
if (S_ISDIR(inode->i_mode))
inc_nlink(dir);
+ goto leave;
+ }
+
+ if (is_unlinkable) {
+ status = ocfs2_orphan_add(osb, handle, inode, fe_bh,
+ orphan_name, &orphan_insert, orphan_dir);
+ if (status < 0)
+ mlog_errno(status);
}
leave:
@@ -2012,6 +2013,21 @@ static int ocfs2_orphan_add(struct ocfs2_super *osb,
goto leave;
}
+ /*
+ * We're going to journal the change of i_flags and i_orphaned_slot.
+ * It's safe anyway, though some callers may duplicate the journaling.
+ * Journaling within the func just make the logic look more
+ * straightforward.
+ */
+ status = ocfs2_journal_access_di(handle,
+ INODE_CACHE(inode),
+ fe_bh,
+ OCFS2_JOURNAL_ACCESS_WRITE);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+
/* we're a cluster, and nlink can change on disk from
* underneath us... */
orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
@@ -2026,25 +2042,10 @@ static int ocfs2_orphan_add(struct ocfs2_super *osb,
orphan_dir_bh, lookup);
if (status < 0) {
mlog_errno(status);
- goto leave;
- }
-
- /*
- * We're going to journal the change of i_flags and i_orphaned_slot.
- * It's safe anyway, though some callers may duplicate the journaling.
- * Journaling within the func just make the logic look more
- * straightforward.
- */
- status = ocfs2_journal_access_di(handle,
- INODE_CACHE(inode),
- fe_bh,
- OCFS2_JOURNAL_ACCESS_WRITE);
- if (status < 0) {
- mlog_errno(status);
- goto leave;
+ goto rollback;
}
- le32_add_cpu(&fe->i_flags, OCFS2_ORPHANED_FL);
+ fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL);
OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR;
/* Record which orphan dir our inode now resides
@@ -2057,11 +2058,16 @@ static int ocfs2_orphan_add(struct ocfs2_super *osb,
trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno,
osb->slot_num);
+rollback:
+ if (status < 0) {
+ if (S_ISDIR(inode->i_mode))
+ ocfs2_add_links_count(orphan_fe, -1);
+ set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
+ }
+
leave:
brelse(orphan_dir_bh);
- if (status)
- mlog_errno(status);
return status;
}
@@ -2434,7 +2440,7 @@ int ocfs2_mv_orphaned_inode_to_new(struct inode *dir,
}
di = (struct ocfs2_dinode *)di_bh->b_data;
- le32_add_cpu(&di->i_flags, -OCFS2_ORPHANED_FL);
+ di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL);
di->i_orphaned_slot = 0;
set_nlink(inode, 1);
ocfs2_set_links_count(di, inode->i_nlink);
diff --git a/fs/ocfs2/ocfs2.h b/fs/ocfs2/ocfs2.h
index d355e6e..3a90347 100644
--- a/fs/ocfs2/ocfs2.h
+++ b/fs/ocfs2/ocfs2.h
@@ -347,7 +347,6 @@ struct ocfs2_super
struct task_struct *recovery_thread_task;
int disable_recovery;
wait_queue_head_t checkpoint_event;
- atomic_t needs_checkpoint;
struct ocfs2_journal *journal;
unsigned long osb_commit_interval;
diff --git a/fs/ocfs2/suballoc.c b/fs/ocfs2/suballoc.c
index b7e74b5..5397c07 100644
--- a/fs/ocfs2/suballoc.c
+++ b/fs/ocfs2/suballoc.c
@@ -1422,7 +1422,7 @@ static int ocfs2_relink_block_group(handle_t *handle,
int status;
/* there is a really tiny chance the journal calls could fail,
* but we wouldn't want inconsistent blocks in *any* case. */
- u64 fe_ptr, bg_ptr, prev_bg_ptr;
+ u64 bg_ptr, prev_bg_ptr;
struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data;
struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) bg_bh->b_data;
struct ocfs2_group_desc *prev_bg = (struct ocfs2_group_desc *) prev_bg_bh->b_data;
@@ -1437,51 +1437,44 @@ static int ocfs2_relink_block_group(handle_t *handle,
(unsigned long long)le64_to_cpu(bg->bg_blkno),
(unsigned long long)le64_to_cpu(prev_bg->bg_blkno));
- fe_ptr = le64_to_cpu(fe->id2.i_chain.cl_recs[chain].c_blkno);
bg_ptr = le64_to_cpu(bg->bg_next_group);
prev_bg_ptr = le64_to_cpu(prev_bg->bg_next_group);
status = ocfs2_journal_access_gd(handle, INODE_CACHE(alloc_inode),
prev_bg_bh,
OCFS2_JOURNAL_ACCESS_WRITE);
- if (status < 0) {
- mlog_errno(status);
- goto out_rollback;
- }
+ if (status < 0)
+ goto out;
prev_bg->bg_next_group = bg->bg_next_group;
ocfs2_journal_dirty(handle, prev_bg_bh);
status = ocfs2_journal_access_gd(handle, INODE_CACHE(alloc_inode),
bg_bh, OCFS2_JOURNAL_ACCESS_WRITE);
- if (status < 0) {
- mlog_errno(status);
- goto out_rollback;
- }
+ if (status < 0)
+ goto out_rollback_prev_bg;
bg->bg_next_group = fe->id2.i_chain.cl_recs[chain].c_blkno;
ocfs2_journal_dirty(handle, bg_bh);
status = ocfs2_journal_access_di(handle, INODE_CACHE(alloc_inode),
fe_bh, OCFS2_JOURNAL_ACCESS_WRITE);
- if (status < 0) {
- mlog_errno(status);
- goto out_rollback;
- }
+ if (status < 0)
+ goto out_rollback_bg;
fe->id2.i_chain.cl_recs[chain].c_blkno = bg->bg_blkno;
ocfs2_journal_dirty(handle, fe_bh);
-out_rollback:
- if (status < 0) {
- fe->id2.i_chain.cl_recs[chain].c_blkno = cpu_to_le64(fe_ptr);
- bg->bg_next_group = cpu_to_le64(bg_ptr);
- prev_bg->bg_next_group = cpu_to_le64(prev_bg_ptr);
- }
-
- if (status)
+out:
+ if (status < 0)
mlog_errno(status);
return status;
+
+out_rollback_bg:
+ bg->bg_next_group = cpu_to_le64(bg_ptr);
+out_rollback_prev_bg:
+ prev_bg->bg_next_group = cpu_to_le64(prev_bg_ptr);
+ goto out;
}
static inline int ocfs2_block_group_reasonably_empty(struct ocfs2_group_desc *bg,
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index 01b8516..854d809 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -286,10 +286,9 @@ static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len)
spin_unlock(&osb->osb_lock);
out += snprintf(buf + out, len - out,
- "%10s => Pid: %d Interval: %lu Needs: %d\n", "Commit",
+ "%10s => Pid: %d Interval: %lu\n", "Commit",
(osb->commit_task ? task_pid_nr(osb->commit_task) : -1),
- osb->osb_commit_interval,
- atomic_read(&osb->needs_checkpoint));
+ osb->osb_commit_interval);
out += snprintf(buf + out, len - out,
"%10s => State: %d TxnId: %lu NumTxns: %d\n",
@@ -2154,7 +2153,6 @@ static int ocfs2_initialize_super(struct super_block *sb,
}
init_waitqueue_head(&osb->checkpoint_event);
- atomic_set(&osb->needs_checkpoint, 0);
osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
diff --git a/fs/ocfs2/xattr.c b/fs/ocfs2/xattr.c
index 2e3ea30..317ef0a 100644
--- a/fs/ocfs2/xattr.c
+++ b/fs/ocfs2/xattr.c
@@ -2751,7 +2751,6 @@ static int ocfs2_xattr_ibody_set(struct inode *inode,
{
int ret;
struct ocfs2_inode_info *oi = OCFS2_I(inode);
- struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
struct ocfs2_xa_loc loc;
if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE)
@@ -2759,13 +2758,6 @@ static int ocfs2_xattr_ibody_set(struct inode *inode,
down_write(&oi->ip_alloc_sem);
if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) {
- if (!ocfs2_xattr_has_space_inline(inode, di)) {
- ret = -ENOSPC;
- goto out;
- }
- }
-
- if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) {
ret = ocfs2_xattr_ibody_init(inode, xs->inode_bh, ctxt);
if (ret) {
if (ret != -ENOSPC)
@@ -6499,6 +6491,16 @@ static int ocfs2_reflink_xattr_inline(struct ocfs2_xattr_reflink *args)
}
new_oi = OCFS2_I(args->new_inode);
+ /*
+ * Adjust extent record count to reserve space for extended attribute.
+ * Inline data count had been adjusted in ocfs2_duplicate_inline_data().
+ */
+ if (!(new_oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) &&
+ !(ocfs2_inode_is_fast_symlink(args->new_inode))) {
+ struct ocfs2_extent_list *el = &new_di->id2.i_list;
+ le16_add_cpu(&el->l_count, -(inline_size /
+ sizeof(struct ocfs2_extent_rec)));
+ }
spin_lock(&new_oi->ip_lock);
new_oi->ip_dyn_features |= OCFS2_HAS_XATTR_FL | OCFS2_INLINE_XATTR_FL;
new_di->i_dyn_features = cpu_to_le16(new_oi->ip_dyn_features);
diff --git a/fs/proc/kcore.c b/fs/proc/kcore.c
index 0a22194..06ea155 100644
--- a/fs/proc/kcore.c
+++ b/fs/proc/kcore.c
@@ -408,7 +408,7 @@ static void elf_kcore_store_hdr(char *bufp, int nphdr, int dataoff)
prpsinfo.pr_zomb = 0;
strcpy(prpsinfo.pr_fname, "vmlinux");
- strncpy(prpsinfo.pr_psargs, saved_command_line, ELF_PRARGSZ);
+ strlcpy(prpsinfo.pr_psargs, saved_command_line, sizeof(prpsinfo.pr_psargs));
nhdr->p_filesz += notesize(&notes[1]);
bufp = storenote(&notes[1], bufp);
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 3e636d8..dbf61f6 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -11,6 +11,7 @@
#include <linux/rmap.h>
#include <linux/swap.h>
#include <linux/swapops.h>
+#include <linux/mmu_notifier.h>
#include <asm/elf.h>
#include <asm/uaccess.h>
@@ -688,10 +689,58 @@ const struct file_operations proc_tid_smaps_operations = {
.release = seq_release_private,
};
+/*
+ * We do not want to have constant page-shift bits sitting in
+ * pagemap entries and are about to reuse them some time soon.
+ *
+ * Here's the "migration strategy":
+ * 1. when the system boots these bits remain what they are,
+ * but a warning about future change is printed in log;
+ * 2. once anyone clears soft-dirty bits via clear_refs file,
+ * these flag is set to denote, that user is aware of the
+ * new API and those page-shift bits change their meaning.
+ * The respective warning is printed in dmesg;
+ * 3. In a couple of releases we will remove all the mentions
+ * of page-shift in pagemap entries.
+ */
+
+static bool soft_dirty_cleared __read_mostly;
+
+enum clear_refs_types {
+ CLEAR_REFS_ALL = 1,
+ CLEAR_REFS_ANON,
+ CLEAR_REFS_MAPPED,
+ CLEAR_REFS_SOFT_DIRTY,
+ CLEAR_REFS_LAST,
+};
+
+struct clear_refs_private {
+ struct vm_area_struct *vma;
+ enum clear_refs_types type;
+};
+
+static inline void clear_soft_dirty(struct vm_area_struct *vma,
+ unsigned long addr, pte_t *pte)
+{
+#ifdef CONFIG_MEM_SOFT_DIRTY
+ /*
+ * The soft-dirty tracker uses #PF-s to catch writes
+ * to pages, so write-protect the pte as well. See the
+ * Documentation/vm/soft-dirty.txt for full description
+ * of how soft-dirty works.
+ */
+ pte_t ptent = *pte;
+ ptent = pte_wrprotect(ptent);
+ ptent = pte_clear_flags(ptent, _PAGE_SOFT_DIRTY);
+ set_pte_at(vma->vm_mm, addr, pte, ptent);
+#endif
+}
+
static int clear_refs_pte_range(pmd_t *pmd, unsigned long addr,
unsigned long end, struct mm_walk *walk)
{
- struct vm_area_struct *vma = walk->private;
+ struct clear_refs_private *cp = walk->private;
+ struct vm_area_struct *vma = cp->vma;
pte_t *pte, ptent;
spinlock_t *ptl;
struct page *page;
@@ -706,6 +755,11 @@ static int clear_refs_pte_range(pmd_t *pmd, unsigned long addr,
if (!pte_present(ptent))
continue;
+ if (cp->type == CLEAR_REFS_SOFT_DIRTY) {
+ clear_soft_dirty(vma, addr, pte);
+ continue;
+ }
+
page = vm_normal_page(vma, addr, ptent);
if (!page)
continue;
@@ -719,10 +773,6 @@ static int clear_refs_pte_range(pmd_t *pmd, unsigned long addr,
return 0;
}
-#define CLEAR_REFS_ALL 1
-#define CLEAR_REFS_ANON 2
-#define CLEAR_REFS_MAPPED 3
-
static ssize_t clear_refs_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
@@ -730,7 +780,8 @@ static ssize_t clear_refs_write(struct file *file, const char __user *buf,
char buffer[PROC_NUMBUF];
struct mm_struct *mm;
struct vm_area_struct *vma;
- int type;
+ enum clear_refs_types type;
+ int itype;
int rv;
memset(buffer, 0, sizeof(buffer));
@@ -738,23 +789,37 @@ static ssize_t clear_refs_write(struct file *file, const char __user *buf,
count = sizeof(buffer) - 1;
if (copy_from_user(buffer, buf, count))
return -EFAULT;
- rv = kstrtoint(strstrip(buffer), 10, &type);
+ rv = kstrtoint(strstrip(buffer), 10, &itype);
if (rv < 0)
return rv;
- if (type < CLEAR_REFS_ALL || type > CLEAR_REFS_MAPPED)
+ type = (enum clear_refs_types)itype;
+ if (type < CLEAR_REFS_ALL || type >= CLEAR_REFS_LAST)
return -EINVAL;
+
+ if (type == CLEAR_REFS_SOFT_DIRTY) {
+ soft_dirty_cleared = true;
+ pr_warn_once("The pagemap bits 55-60 has changed their meaning! "
+ "See the linux/Documentation/vm/pagemap.txt for details.\n");
+ }
+
task = get_proc_task(file_inode(file));
if (!task)
return -ESRCH;
mm = get_task_mm(task);
if (mm) {
+ struct clear_refs_private cp = {
+ .type = type,
+ };
struct mm_walk clear_refs_walk = {
.pmd_entry = clear_refs_pte_range,
.mm = mm,
+ .private = &cp,
};
down_read(&mm->mmap_sem);
+ if (type == CLEAR_REFS_SOFT_DIRTY)
+ mmu_notifier_invalidate_range_start(mm, 0, -1);
for (vma = mm->mmap; vma; vma = vma->vm_next) {
- clear_refs_walk.private = vma;
+ cp.vma = vma;
if (is_vm_hugetlb_page(vma))
continue;
/*
@@ -773,6 +838,8 @@ static ssize_t clear_refs_write(struct file *file, const char __user *buf,
walk_page_range(vma->vm_start, vma->vm_end,
&clear_refs_walk);
}
+ if (type == CLEAR_REFS_SOFT_DIRTY)
+ mmu_notifier_invalidate_range_end(mm, 0, -1);
flush_tlb_mm(mm);
up_read(&mm->mmap_sem);
mmput(mm);
@@ -794,6 +861,7 @@ typedef struct {
struct pagemapread {
int pos, len;
pagemap_entry_t *buffer;
+ bool v2;
};
#define PAGEMAP_WALK_SIZE (PMD_SIZE)
@@ -807,14 +875,17 @@ struct pagemapread {
#define PM_PSHIFT_BITS 6
#define PM_PSHIFT_OFFSET (PM_STATUS_OFFSET - PM_PSHIFT_BITS)
#define PM_PSHIFT_MASK (((1LL << PM_PSHIFT_BITS) - 1) << PM_PSHIFT_OFFSET)
-#define PM_PSHIFT(x) (((u64) (x) << PM_PSHIFT_OFFSET) & PM_PSHIFT_MASK)
+#define __PM_PSHIFT(x) (((u64) (x) << PM_PSHIFT_OFFSET) & PM_PSHIFT_MASK)
#define PM_PFRAME_MASK ((1LL << PM_PSHIFT_OFFSET) - 1)
#define PM_PFRAME(x) ((x) & PM_PFRAME_MASK)
+/* in "new" pagemap pshift bits are occupied with more status bits */
+#define PM_STATUS2(v2, x) (__PM_PSHIFT(v2 ? x : PAGE_SHIFT))
+#define __PM_SOFT_DIRTY (1LL)
#define PM_PRESENT PM_STATUS(4LL)
#define PM_SWAP PM_STATUS(2LL)
#define PM_FILE PM_STATUS(1LL)
-#define PM_NOT_PRESENT PM_PSHIFT(PAGE_SHIFT)
+#define PM_NOT_PRESENT(v2) PM_STATUS2(v2, 0)
#define PM_END_OF_BUFFER 1
static inline pagemap_entry_t make_pme(u64 val)
@@ -837,7 +908,7 @@ static int pagemap_pte_hole(unsigned long start, unsigned long end,
struct pagemapread *pm = walk->private;
unsigned long addr;
int err = 0;
- pagemap_entry_t pme = make_pme(PM_NOT_PRESENT);
+ pagemap_entry_t pme = make_pme(PM_NOT_PRESENT(pm->v2));
for (addr = start; addr < end; addr += PAGE_SIZE) {
err = add_to_pagemap(addr, &pme, pm);
@@ -847,11 +918,12 @@ static int pagemap_pte_hole(unsigned long start, unsigned long end,
return err;
}
-static void pte_to_pagemap_entry(pagemap_entry_t *pme,
+static void pte_to_pagemap_entry(pagemap_entry_t *pme, struct pagemapread *pm,
struct vm_area_struct *vma, unsigned long addr, pte_t pte)
{
u64 frame, flags;
struct page *page = NULL;
+ int flags2 = 0;
if (pte_present(pte)) {
frame = pte_pfn(pte);
@@ -866,19 +938,21 @@ static void pte_to_pagemap_entry(pagemap_entry_t *pme,
if (is_migration_entry(entry))
page = migration_entry_to_page(entry);
} else {
- *pme = make_pme(PM_NOT_PRESENT);
+ *pme = make_pme(PM_NOT_PRESENT(pm->v2));
return;
}
if (page && !PageAnon(page))
flags |= PM_FILE;
+ if (pte_soft_dirty(pte))
+ flags2 |= __PM_SOFT_DIRTY;
- *pme = make_pme(PM_PFRAME(frame) | PM_PSHIFT(PAGE_SHIFT) | flags);
+ *pme = make_pme(PM_PFRAME(frame) | PM_STATUS2(pm->v2, flags2) | flags);
}
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
-static void thp_pmd_to_pagemap_entry(pagemap_entry_t *pme,
- pmd_t pmd, int offset)
+static void thp_pmd_to_pagemap_entry(pagemap_entry_t *pme, struct pagemapread *pm,
+ pmd_t pmd, int offset, int pmd_flags2)
{
/*
* Currently pmd for thp is always present because thp can not be
@@ -887,13 +961,13 @@ static void thp_pmd_to_pagemap_entry(pagemap_entry_t *pme,
*/
if (pmd_present(pmd))
*pme = make_pme(PM_PFRAME(pmd_pfn(pmd) + offset)
- | PM_PSHIFT(PAGE_SHIFT) | PM_PRESENT);
+ | PM_STATUS2(pm->v2, pmd_flags2) | PM_PRESENT);
else
- *pme = make_pme(PM_NOT_PRESENT);
+ *pme = make_pme(PM_NOT_PRESENT(pm->v2));
}
#else
-static inline void thp_pmd_to_pagemap_entry(pagemap_entry_t *pme,
- pmd_t pmd, int offset)
+static inline void thp_pmd_to_pagemap_entry(pagemap_entry_t *pme, struct pagemapread *pm,
+ pmd_t pmd, int offset, int pmd_flags2)
{
}
#endif
@@ -905,17 +979,20 @@ static int pagemap_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
struct pagemapread *pm = walk->private;
pte_t *pte;
int err = 0;
- pagemap_entry_t pme = make_pme(PM_NOT_PRESENT);
+ pagemap_entry_t pme = make_pme(PM_NOT_PRESENT(pm->v2));
/* find the first VMA at or above 'addr' */
vma = find_vma(walk->mm, addr);
if (vma && pmd_trans_huge_lock(pmd, vma) == 1) {
+ int pmd_flags2;
+
+ pmd_flags2 = (pmd_soft_dirty(*pmd) ? __PM_SOFT_DIRTY : 0);
for (; addr != end; addr += PAGE_SIZE) {
unsigned long offset;
offset = (addr & ~PAGEMAP_WALK_MASK) >>
PAGE_SHIFT;
- thp_pmd_to_pagemap_entry(&pme, *pmd, offset);
+ thp_pmd_to_pagemap_entry(&pme, pm, *pmd, offset, pmd_flags2);
err = add_to_pagemap(addr, &pme, pm);
if (err)
break;
@@ -932,7 +1009,7 @@ static int pagemap_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
* and need a new, higher one */
if (vma && (addr >= vma->vm_end)) {
vma = find_vma(walk->mm, addr);
- pme = make_pme(PM_NOT_PRESENT);
+ pme = make_pme(PM_NOT_PRESENT(pm->v2));
}
/* check that 'vma' actually covers this address,
@@ -940,7 +1017,7 @@ static int pagemap_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
if (vma && (vma->vm_start <= addr) &&
!is_vm_hugetlb_page(vma)) {
pte = pte_offset_map(pmd, addr);
- pte_to_pagemap_entry(&pme, vma, addr, *pte);
+ pte_to_pagemap_entry(&pme, pm, vma, addr, *pte);
/* unmap before userspace copy */
pte_unmap(pte);
}
@@ -955,14 +1032,14 @@ static int pagemap_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
}
#ifdef CONFIG_HUGETLB_PAGE
-static void huge_pte_to_pagemap_entry(pagemap_entry_t *pme,
+static void huge_pte_to_pagemap_entry(pagemap_entry_t *pme, struct pagemapread *pm,
pte_t pte, int offset)
{
if (pte_present(pte))
*pme = make_pme(PM_PFRAME(pte_pfn(pte) + offset)
- | PM_PSHIFT(PAGE_SHIFT) | PM_PRESENT);
+ | PM_STATUS2(pm->v2, 0) | PM_PRESENT);
else
- *pme = make_pme(PM_NOT_PRESENT);
+ *pme = make_pme(PM_NOT_PRESENT(pm->v2));
}
/* This function walks within one hugetlb entry in the single call */
@@ -976,7 +1053,7 @@ static int pagemap_hugetlb_range(pte_t *pte, unsigned long hmask,
for (; addr != end; addr += PAGE_SIZE) {
int offset = (addr & ~hmask) >> PAGE_SHIFT;
- huge_pte_to_pagemap_entry(&pme, *pte, offset);
+ huge_pte_to_pagemap_entry(&pme, pm, *pte, offset);
err = add_to_pagemap(addr, &pme, pm);
if (err)
return err;
@@ -1038,6 +1115,7 @@ static ssize_t pagemap_read(struct file *file, char __user *buf,
if (!count)
goto out_task;
+ pm.v2 = soft_dirty_cleared;
pm.len = PM_ENTRY_BYTES * (PAGEMAP_WALK_SIZE >> PAGE_SHIFT);
pm.buffer = kmalloc(pm.len, GFP_TEMPORARY);
ret = -ENOMEM;
@@ -1110,9 +1188,18 @@ out:
return ret;
}
+static int pagemap_open(struct inode *inode, struct file *file)
+{
+ pr_warn_once("Bits 55-60 of /proc/PID/pagemap entries are about "
+ "to stop being page-shift some time soon. See the "
+ "linux/Documentation/vm/pagemap.txt for details.\n");
+ return 0;
+}
+
const struct file_operations proc_pagemap_operations = {
.llseek = mem_lseek, /* borrow this */
.read = pagemap_read,
+ .open = pagemap_open,
};
#endif /* CONFIG_PROC_PAGE_MONITOR */
diff --git a/fs/proc/uptime.c b/fs/proc/uptime.c
index 9610ac7..0618946 100644
--- a/fs/proc/uptime.c
+++ b/fs/proc/uptime.c
@@ -20,8 +20,7 @@ static int uptime_proc_show(struct seq_file *m, void *v)
for_each_possible_cpu(i)
idletime += (__force u64) kcpustat_cpu(i).cpustat[CPUTIME_IDLE];
- do_posix_clock_monotonic_gettime(&uptime);
- monotonic_to_bootbased(&uptime);
+ get_monotonic_boottime(&uptime);
nsec = cputime64_to_jiffies64(idletime) * TICK_NSEC;
idle.tv_sec = div_u64_rem(nsec, NSEC_PER_SEC, &rem);
idle.tv_nsec = rem;
diff --git a/fs/proc/vmcore.c b/fs/proc/vmcore.c
index 17f7e08..2850317 100644
--- a/fs/proc/vmcore.c
+++ b/fs/proc/vmcore.c
@@ -20,6 +20,7 @@
#include <linux/init.h>
#include <linux/crash_dump.h>
#include <linux/list.h>
+#include <linux/vmalloc.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#include "internal.h"
@@ -32,6 +33,10 @@ static LIST_HEAD(vmcore_list);
/* Stores the pointer to the buffer containing kernel elf core headers. */
static char *elfcorebuf;
static size_t elfcorebuf_sz;
+static size_t elfcorebuf_sz_orig;
+
+static char *elfnotes_buf;
+static size_t elfnotes_sz;
/* Total size of vmcore file. */
static u64 vmcore_size;
@@ -118,27 +123,6 @@ static ssize_t read_from_oldmem(char *buf, size_t count,
return read;
}
-/* Maps vmcore file offset to respective physical address in memroy. */
-static u64 map_offset_to_paddr(loff_t offset, struct list_head *vc_list,
- struct vmcore **m_ptr)
-{
- struct vmcore *m;
- u64 paddr;
-
- list_for_each_entry(m, vc_list, list) {
- u64 start, end;
- start = m->offset;
- end = m->offset + m->size - 1;
- if (offset >= start && offset <= end) {
- paddr = m->paddr + offset - start;
- *m_ptr = m;
- return paddr;
- }
- }
- *m_ptr = NULL;
- return 0;
-}
-
/* Read from the ELF header and then the crash dump. On error, negative value is
* returned otherwise number of bytes read are returned.
*/
@@ -147,8 +131,8 @@ static ssize_t read_vmcore(struct file *file, char __user *buffer,
{
ssize_t acc = 0, tmp;
size_t tsz;
- u64 start, nr_bytes;
- struct vmcore *curr_m = NULL;
+ u64 start;
+ struct vmcore *m = NULL;
if (buflen == 0 || *fpos >= vmcore_size)
return 0;
@@ -159,9 +143,7 @@ static ssize_t read_vmcore(struct file *file, char __user *buffer,
/* Read ELF core header */
if (*fpos < elfcorebuf_sz) {
- tsz = elfcorebuf_sz - *fpos;
- if (buflen < tsz)
- tsz = buflen;
+ tsz = min(elfcorebuf_sz - (size_t)*fpos, buflen);
if (copy_to_user(buffer, elfcorebuf + *fpos, tsz))
return -EFAULT;
buflen -= tsz;
@@ -174,39 +156,161 @@ static ssize_t read_vmcore(struct file *file, char __user *buffer,
return acc;
}
- start = map_offset_to_paddr(*fpos, &vmcore_list, &curr_m);
- if (!curr_m)
- return -EINVAL;
-
- while (buflen) {
- tsz = min_t(size_t, buflen, PAGE_SIZE - (start & ~PAGE_MASK));
+ /* Read Elf note segment */
+ if (*fpos < elfcorebuf_sz + elfnotes_sz) {
+ void *kaddr;
- /* Calculate left bytes in current memory segment. */
- nr_bytes = (curr_m->size - (start - curr_m->paddr));
- if (tsz > nr_bytes)
- tsz = nr_bytes;
-
- tmp = read_from_oldmem(buffer, tsz, &start, 1);
- if (tmp < 0)
- return tmp;
+ tsz = min(elfcorebuf_sz + elfnotes_sz - (size_t)*fpos, buflen);
+ kaddr = elfnotes_buf + *fpos - elfcorebuf_sz;
+ if (copy_to_user(buffer, kaddr, tsz))
+ return -EFAULT;
buflen -= tsz;
*fpos += tsz;
buffer += tsz;
acc += tsz;
- if (start >= (curr_m->paddr + curr_m->size)) {
- if (curr_m->list.next == &vmcore_list)
- return acc; /*EOF*/
- curr_m = list_entry(curr_m->list.next,
- struct vmcore, list);
- start = curr_m->paddr;
+
+ /* leave now if filled buffer already */
+ if (buflen == 0)
+ return acc;
+ }
+
+ list_for_each_entry(m, &vmcore_list, list) {
+ if (*fpos < m->offset + m->size) {
+ tsz = min_t(size_t, m->offset + m->size - *fpos, buflen);
+ start = m->paddr + *fpos - m->offset;
+ tmp = read_from_oldmem(buffer, tsz, &start, 1);
+ if (tmp < 0)
+ return tmp;
+ buflen -= tsz;
+ *fpos += tsz;
+ buffer += tsz;
+ acc += tsz;
+
+ /* leave now if filled buffer already */
+ if (buflen == 0)
+ return acc;
}
}
+
return acc;
}
+/**
+ * alloc_elfnotes_buf - allocate buffer for ELF note segment in
+ * vmalloc memory
+ *
+ * @notes_sz: size of buffer
+ *
+ * If CONFIG_MMU is defined, use vmalloc_user() to allow users to mmap
+ * the buffer to user-space by means of remap_vmalloc_range().
+ *
+ * If CONFIG_MMU is not defined, use vzalloc() since mmap_vmcore() is
+ * disabled and there's no need to allow users to mmap the buffer.
+ */
+static inline char *alloc_elfnotes_buf(size_t notes_sz)
+{
+#ifdef CONFIG_MMU
+ return vmalloc_user(notes_sz);
+#else
+ return vzalloc(notes_sz);
+#endif
+}
+
+/*
+ * Disable mmap_vmcore() if CONFIG_MMU is not defined. MMU is
+ * essential for mmap_vmcore() in order to map physically
+ * non-contiguous objects (ELF header, ELF note segment and memory
+ * regions in the 1st kernel pointed to by PT_LOAD entries) into
+ * virtually contiguous user-space in ELF layout.
+ */
+#ifdef CONFIG_MMU
+static int mmap_vmcore(struct file *file, struct vm_area_struct *vma)
+{
+ size_t size = vma->vm_end - vma->vm_start;
+ u64 start, end, len, tsz;
+ struct vmcore *m;
+
+ start = (u64)vma->vm_pgoff << PAGE_SHIFT;
+ end = start + size;
+
+ if (size > vmcore_size || end > vmcore_size)
+ return -EINVAL;
+
+ if (vma->vm_flags & (VM_WRITE | VM_EXEC))
+ return -EPERM;
+
+ vma->vm_flags &= ~(VM_MAYWRITE | VM_MAYEXEC);
+ vma->vm_flags |= VM_MIXEDMAP;
+
+ len = 0;
+
+ if (start < elfcorebuf_sz) {
+ u64 pfn;
+
+ tsz = min(elfcorebuf_sz - (size_t)start, size);
+ pfn = __pa(elfcorebuf + start) >> PAGE_SHIFT;
+ if (remap_pfn_range(vma, vma->vm_start, pfn, tsz,
+ vma->vm_page_prot))
+ return -EAGAIN;
+ size -= tsz;
+ start += tsz;
+ len += tsz;
+
+ if (size == 0)
+ return 0;
+ }
+
+ if (start < elfcorebuf_sz + elfnotes_sz) {
+ void *kaddr;
+
+ tsz = min(elfcorebuf_sz + elfnotes_sz - (size_t)start, size);
+ kaddr = elfnotes_buf + start - elfcorebuf_sz;
+ if (remap_vmalloc_range_partial(vma, vma->vm_start + len,
+ kaddr, tsz))
+ goto fail;
+ size -= tsz;
+ start += tsz;
+ len += tsz;
+
+ if (size == 0)
+ return 0;
+ }
+
+ list_for_each_entry(m, &vmcore_list, list) {
+ if (start < m->offset + m->size) {
+ u64 paddr = 0;
+
+ tsz = min_t(size_t, m->offset + m->size - start, size);
+ paddr = m->paddr + start - m->offset;
+ if (remap_pfn_range(vma, vma->vm_start + len,
+ paddr >> PAGE_SHIFT, tsz,
+ vma->vm_page_prot))
+ goto fail;
+ size -= tsz;
+ start += tsz;
+ len += tsz;
+
+ if (size == 0)
+ return 0;
+ }
+ }
+
+ return 0;
+fail:
+ do_munmap(vma->vm_mm, vma->vm_start, len);
+ return -EAGAIN;
+}
+#else
+static int mmap_vmcore(struct file *file, struct vm_area_struct *vma)
+{
+ return -ENOSYS;
+}
+#endif
+
static const struct file_operations proc_vmcore_operations = {
.read = read_vmcore,
.llseek = default_llseek,
+ .mmap = mmap_vmcore,
};
static struct vmcore* __init get_new_element(void)
@@ -214,61 +318,40 @@ static struct vmcore* __init get_new_element(void)
return kzalloc(sizeof(struct vmcore), GFP_KERNEL);
}
-static u64 __init get_vmcore_size_elf64(char *elfptr)
+static u64 __init get_vmcore_size(size_t elfsz, size_t elfnotesegsz,
+ struct list_head *vc_list)
{
- int i;
- u64 size;
- Elf64_Ehdr *ehdr_ptr;
- Elf64_Phdr *phdr_ptr;
-
- ehdr_ptr = (Elf64_Ehdr *)elfptr;
- phdr_ptr = (Elf64_Phdr*)(elfptr + sizeof(Elf64_Ehdr));
- size = sizeof(Elf64_Ehdr) + ((ehdr_ptr->e_phnum) * sizeof(Elf64_Phdr));
- for (i = 0; i < ehdr_ptr->e_phnum; i++) {
- size += phdr_ptr->p_memsz;
- phdr_ptr++;
- }
- return size;
-}
-
-static u64 __init get_vmcore_size_elf32(char *elfptr)
-{
- int i;
u64 size;
- Elf32_Ehdr *ehdr_ptr;
- Elf32_Phdr *phdr_ptr;
+ struct vmcore *m;
- ehdr_ptr = (Elf32_Ehdr *)elfptr;
- phdr_ptr = (Elf32_Phdr*)(elfptr + sizeof(Elf32_Ehdr));
- size = sizeof(Elf32_Ehdr) + ((ehdr_ptr->e_phnum) * sizeof(Elf32_Phdr));
- for (i = 0; i < ehdr_ptr->e_phnum; i++) {
- size += phdr_ptr->p_memsz;
- phdr_ptr++;
+ size = elfsz + elfnotesegsz;
+ list_for_each_entry(m, vc_list, list) {
+ size += m->size;
}
return size;
}
-/* Merges all the PT_NOTE headers into one. */
-static int __init merge_note_headers_elf64(char *elfptr, size_t *elfsz,
- struct list_head *vc_list)
+/**
+ * update_note_header_size_elf64 - update p_memsz member of each PT_NOTE entry
+ *
+ * @ehdr_ptr: ELF header
+ *
+ * This function updates p_memsz member of each PT_NOTE entry in the
+ * program header table pointed to by @ehdr_ptr to real size of ELF
+ * note segment.
+ */
+static int __init update_note_header_size_elf64(const Elf64_Ehdr *ehdr_ptr)
{
- int i, nr_ptnote=0, rc=0;
- char *tmp;
- Elf64_Ehdr *ehdr_ptr;
- Elf64_Phdr phdr, *phdr_ptr;
+ int i, rc=0;
+ Elf64_Phdr *phdr_ptr;
Elf64_Nhdr *nhdr_ptr;
- u64 phdr_sz = 0, note_off;
- ehdr_ptr = (Elf64_Ehdr *)elfptr;
- phdr_ptr = (Elf64_Phdr*)(elfptr + sizeof(Elf64_Ehdr));
+ phdr_ptr = (Elf64_Phdr *)(ehdr_ptr + 1);
for (i = 0; i < ehdr_ptr->e_phnum; i++, phdr_ptr++) {
- int j;
void *notes_section;
- struct vmcore *new;
u64 offset, max_sz, sz, real_sz = 0;
if (phdr_ptr->p_type != PT_NOTE)
continue;
- nr_ptnote++;
max_sz = phdr_ptr->p_memsz;
offset = phdr_ptr->p_offset;
notes_section = kmalloc(max_sz, GFP_KERNEL);
@@ -280,7 +363,7 @@ static int __init merge_note_headers_elf64(char *elfptr, size_t *elfsz,
return rc;
}
nhdr_ptr = notes_section;
- for (j = 0; j < max_sz; j += sz) {
+ while (real_sz < max_sz) {
if (nhdr_ptr->n_namesz == 0)
break;
sz = sizeof(Elf64_Nhdr) +
@@ -289,26 +372,122 @@ static int __init merge_note_headers_elf64(char *elfptr, size_t *elfsz,
real_sz += sz;
nhdr_ptr = (Elf64_Nhdr*)((char*)nhdr_ptr + sz);
}
-
- /* Add this contiguous chunk of notes section to vmcore list.*/
- new = get_new_element();
- if (!new) {
- kfree(notes_section);
- return -ENOMEM;
- }
- new->paddr = phdr_ptr->p_offset;
- new->size = real_sz;
- list_add_tail(&new->list, vc_list);
- phdr_sz += real_sz;
kfree(notes_section);
+ phdr_ptr->p_memsz = real_sz;
+ }
+
+ return 0;
+}
+
+/**
+ * get_note_number_and_size_elf64 - get the number of PT_NOTE program
+ * headers and sum of real size of their ELF note segment headers and
+ * data.
+ *
+ * @ehdr_ptr: ELF header
+ * @nr_ptnote: buffer for the number of PT_NOTE program headers
+ * @sz_ptnote: buffer for size of unique PT_NOTE program header
+ *
+ * This function is used to merge multiple PT_NOTE program headers
+ * into a unique single one. The resulting unique entry will have
+ * @sz_ptnote in its phdr->p_mem.
+ *
+ * It is assumed that program headers with PT_NOTE type pointed to by
+ * @ehdr_ptr has already been updated by update_note_header_size_elf64
+ * and each of PT_NOTE program headers has actual ELF note segment
+ * size in its p_memsz member.
+ */
+static int __init get_note_number_and_size_elf64(const Elf64_Ehdr *ehdr_ptr,
+ int *nr_ptnote, u64 *sz_ptnote)
+{
+ int i;
+ Elf64_Phdr *phdr_ptr;
+
+ *nr_ptnote = *sz_ptnote = 0;
+
+ phdr_ptr = (Elf64_Phdr *)(ehdr_ptr + 1);
+ for (i = 0; i < ehdr_ptr->e_phnum; i++, phdr_ptr++) {
+ if (phdr_ptr->p_type != PT_NOTE)
+ continue;
+ *nr_ptnote += 1;
+ *sz_ptnote += phdr_ptr->p_memsz;
+ }
+
+ return 0;
+}
+
+/**
+ * copy_notes_elf64 - copy ELF note segments in a given buffer
+ *
+ * @ehdr_ptr: ELF header
+ * @notes_buf: buffer into which ELF note segments are copied
+ *
+ * This function is used to copy ELF note segment in the 1st kernel
+ * into the buffer @notes_buf in the 2nd kernel. It is assumed that
+ * size of the buffer @notes_buf is equal to or larger than sum of the
+ * real ELF note segment headers and data.
+ *
+ * It is assumed that program headers with PT_NOTE type pointed to by
+ * @ehdr_ptr has already been updated by update_note_header_size_elf64
+ * and each of PT_NOTE program headers has actual ELF note segment
+ * size in its p_memsz member.
+ */
+static int __init copy_notes_elf64(const Elf64_Ehdr *ehdr_ptr, char *notes_buf)
+{
+ int i, rc=0;
+ Elf64_Phdr *phdr_ptr;
+
+ phdr_ptr = (Elf64_Phdr*)(ehdr_ptr + 1);
+
+ for (i = 0; i < ehdr_ptr->e_phnum; i++, phdr_ptr++) {
+ u64 offset;
+ if (phdr_ptr->p_type != PT_NOTE)
+ continue;
+ offset = phdr_ptr->p_offset;
+ rc = read_from_oldmem(notes_buf, phdr_ptr->p_memsz, &offset, 0);
+ if (rc < 0)
+ return rc;
+ notes_buf += phdr_ptr->p_memsz;
}
+ return 0;
+}
+
+/* Merges all the PT_NOTE headers into one. */
+static int __init merge_note_headers_elf64(char *elfptr, size_t *elfsz,
+ char **notes_buf, size_t *notes_sz)
+{
+ int i, nr_ptnote=0, rc=0;
+ char *tmp;
+ Elf64_Ehdr *ehdr_ptr;
+ Elf64_Phdr phdr;
+ u64 phdr_sz = 0, note_off;
+
+ ehdr_ptr = (Elf64_Ehdr *)elfptr;
+
+ rc = update_note_header_size_elf64(ehdr_ptr);
+ if (rc < 0)
+ return rc;
+
+ rc = get_note_number_and_size_elf64(ehdr_ptr, &nr_ptnote, &phdr_sz);
+ if (rc < 0)
+ return rc;
+
+ *notes_sz = roundup(phdr_sz, PAGE_SIZE);
+ *notes_buf = alloc_elfnotes_buf(*notes_sz);
+ if (!*notes_buf)
+ return -ENOMEM;
+
+ rc = copy_notes_elf64(ehdr_ptr, *notes_buf);
+ if (rc < 0)
+ return rc;
+
/* Prepare merged PT_NOTE program header. */
phdr.p_type = PT_NOTE;
phdr.p_flags = 0;
note_off = sizeof(Elf64_Ehdr) +
(ehdr_ptr->e_phnum - nr_ptnote +1) * sizeof(Elf64_Phdr);
- phdr.p_offset = note_off;
+ phdr.p_offset = roundup(note_off, PAGE_SIZE);
phdr.p_vaddr = phdr.p_paddr = 0;
phdr.p_filesz = phdr.p_memsz = phdr_sz;
phdr.p_align = 0;
@@ -322,6 +501,8 @@ static int __init merge_note_headers_elf64(char *elfptr, size_t *elfsz,
i = (nr_ptnote - 1) * sizeof(Elf64_Phdr);
*elfsz = *elfsz - i;
memmove(tmp, tmp+i, ((*elfsz)-sizeof(Elf64_Ehdr)-sizeof(Elf64_Phdr)));
+ memset(elfptr + *elfsz, 0, i);
+ *elfsz = roundup(*elfsz, PAGE_SIZE);
/* Modify e_phnum to reflect merged headers. */
ehdr_ptr->e_phnum = ehdr_ptr->e_phnum - nr_ptnote + 1;
@@ -329,27 +510,27 @@ static int __init merge_note_headers_elf64(char *elfptr, size_t *elfsz,
return 0;
}
-/* Merges all the PT_NOTE headers into one. */
-static int __init merge_note_headers_elf32(char *elfptr, size_t *elfsz,
- struct list_head *vc_list)
+/**
+ * update_note_header_size_elf32 - update p_memsz member of each PT_NOTE entry
+ *
+ * @ehdr_ptr: ELF header
+ *
+ * This function updates p_memsz member of each PT_NOTE entry in the
+ * program header table pointed to by @ehdr_ptr to real size of ELF
+ * note segment.
+ */
+static int __init update_note_header_size_elf32(const Elf32_Ehdr *ehdr_ptr)
{
- int i, nr_ptnote=0, rc=0;
- char *tmp;
- Elf32_Ehdr *ehdr_ptr;
- Elf32_Phdr phdr, *phdr_ptr;
+ int i, rc=0;
+ Elf32_Phdr *phdr_ptr;
Elf32_Nhdr *nhdr_ptr;
- u64 phdr_sz = 0, note_off;
- ehdr_ptr = (Elf32_Ehdr *)elfptr;
- phdr_ptr = (Elf32_Phdr*)(elfptr + sizeof(Elf32_Ehdr));
+ phdr_ptr = (Elf32_Phdr *)(ehdr_ptr + 1);
for (i = 0; i < ehdr_ptr->e_phnum; i++, phdr_ptr++) {
- int j;
void *notes_section;
- struct vmcore *new;
u64 offset, max_sz, sz, real_sz = 0;
if (phdr_ptr->p_type != PT_NOTE)
continue;
- nr_ptnote++;
max_sz = phdr_ptr->p_memsz;
offset = phdr_ptr->p_offset;
notes_section = kmalloc(max_sz, GFP_KERNEL);
@@ -361,7 +542,7 @@ static int __init merge_note_headers_elf32(char *elfptr, size_t *elfsz,
return rc;
}
nhdr_ptr = notes_section;
- for (j = 0; j < max_sz; j += sz) {
+ while (real_sz < max_sz) {
if (nhdr_ptr->n_namesz == 0)
break;
sz = sizeof(Elf32_Nhdr) +
@@ -370,26 +551,122 @@ static int __init merge_note_headers_elf32(char *elfptr, size_t *elfsz,
real_sz += sz;
nhdr_ptr = (Elf32_Nhdr*)((char*)nhdr_ptr + sz);
}
-
- /* Add this contiguous chunk of notes section to vmcore list.*/
- new = get_new_element();
- if (!new) {
- kfree(notes_section);
- return -ENOMEM;
- }
- new->paddr = phdr_ptr->p_offset;
- new->size = real_sz;
- list_add_tail(&new->list, vc_list);
- phdr_sz += real_sz;
kfree(notes_section);
+ phdr_ptr->p_memsz = real_sz;
+ }
+
+ return 0;
+}
+
+/**
+ * get_note_number_and_size_elf32 - get the number of PT_NOTE program
+ * headers and sum of real size of their ELF note segment headers and
+ * data.
+ *
+ * @ehdr_ptr: ELF header
+ * @nr_ptnote: buffer for the number of PT_NOTE program headers
+ * @sz_ptnote: buffer for size of unique PT_NOTE program header
+ *
+ * This function is used to merge multiple PT_NOTE program headers
+ * into a unique single one. The resulting unique entry will have
+ * @sz_ptnote in its phdr->p_mem.
+ *
+ * It is assumed that program headers with PT_NOTE type pointed to by
+ * @ehdr_ptr has already been updated by update_note_header_size_elf32
+ * and each of PT_NOTE program headers has actual ELF note segment
+ * size in its p_memsz member.
+ */
+static int __init get_note_number_and_size_elf32(const Elf32_Ehdr *ehdr_ptr,
+ int *nr_ptnote, u64 *sz_ptnote)
+{
+ int i;
+ Elf32_Phdr *phdr_ptr;
+
+ *nr_ptnote = *sz_ptnote = 0;
+
+ phdr_ptr = (Elf32_Phdr *)(ehdr_ptr + 1);
+ for (i = 0; i < ehdr_ptr->e_phnum; i++, phdr_ptr++) {
+ if (phdr_ptr->p_type != PT_NOTE)
+ continue;
+ *nr_ptnote += 1;
+ *sz_ptnote += phdr_ptr->p_memsz;
+ }
+
+ return 0;
+}
+
+/**
+ * copy_notes_elf32 - copy ELF note segments in a given buffer
+ *
+ * @ehdr_ptr: ELF header
+ * @notes_buf: buffer into which ELF note segments are copied
+ *
+ * This function is used to copy ELF note segment in the 1st kernel
+ * into the buffer @notes_buf in the 2nd kernel. It is assumed that
+ * size of the buffer @notes_buf is equal to or larger than sum of the
+ * real ELF note segment headers and data.
+ *
+ * It is assumed that program headers with PT_NOTE type pointed to by
+ * @ehdr_ptr has already been updated by update_note_header_size_elf32
+ * and each of PT_NOTE program headers has actual ELF note segment
+ * size in its p_memsz member.
+ */
+static int __init copy_notes_elf32(const Elf32_Ehdr *ehdr_ptr, char *notes_buf)
+{
+ int i, rc=0;
+ Elf32_Phdr *phdr_ptr;
+
+ phdr_ptr = (Elf32_Phdr*)(ehdr_ptr + 1);
+
+ for (i = 0; i < ehdr_ptr->e_phnum; i++, phdr_ptr++) {
+ u64 offset;
+ if (phdr_ptr->p_type != PT_NOTE)
+ continue;
+ offset = phdr_ptr->p_offset;
+ rc = read_from_oldmem(notes_buf, phdr_ptr->p_memsz, &offset, 0);
+ if (rc < 0)
+ return rc;
+ notes_buf += phdr_ptr->p_memsz;
}
+ return 0;
+}
+
+/* Merges all the PT_NOTE headers into one. */
+static int __init merge_note_headers_elf32(char *elfptr, size_t *elfsz,
+ char **notes_buf, size_t *notes_sz)
+{
+ int i, nr_ptnote=0, rc=0;
+ char *tmp;
+ Elf32_Ehdr *ehdr_ptr;
+ Elf32_Phdr phdr;
+ u64 phdr_sz = 0, note_off;
+
+ ehdr_ptr = (Elf32_Ehdr *)elfptr;
+
+ rc = update_note_header_size_elf32(ehdr_ptr);
+ if (rc < 0)
+ return rc;
+
+ rc = get_note_number_and_size_elf32(ehdr_ptr, &nr_ptnote, &phdr_sz);
+ if (rc < 0)
+ return rc;
+
+ *notes_sz = roundup(phdr_sz, PAGE_SIZE);
+ *notes_buf = alloc_elfnotes_buf(*notes_sz);
+ if (!*notes_buf)
+ return -ENOMEM;
+
+ rc = copy_notes_elf32(ehdr_ptr, *notes_buf);
+ if (rc < 0)
+ return rc;
+
/* Prepare merged PT_NOTE program header. */
phdr.p_type = PT_NOTE;
phdr.p_flags = 0;
note_off = sizeof(Elf32_Ehdr) +
(ehdr_ptr->e_phnum - nr_ptnote +1) * sizeof(Elf32_Phdr);
- phdr.p_offset = note_off;
+ phdr.p_offset = roundup(note_off, PAGE_SIZE);
phdr.p_vaddr = phdr.p_paddr = 0;
phdr.p_filesz = phdr.p_memsz = phdr_sz;
phdr.p_align = 0;
@@ -403,6 +680,8 @@ static int __init merge_note_headers_elf32(char *elfptr, size_t *elfsz,
i = (nr_ptnote - 1) * sizeof(Elf32_Phdr);
*elfsz = *elfsz - i;
memmove(tmp, tmp+i, ((*elfsz)-sizeof(Elf32_Ehdr)-sizeof(Elf32_Phdr)));
+ memset(elfptr + *elfsz, 0, i);
+ *elfsz = roundup(*elfsz, PAGE_SIZE);
/* Modify e_phnum to reflect merged headers. */
ehdr_ptr->e_phnum = ehdr_ptr->e_phnum - nr_ptnote + 1;
@@ -414,6 +693,7 @@ static int __init merge_note_headers_elf32(char *elfptr, size_t *elfsz,
* the new offset fields of exported program headers. */
static int __init process_ptload_program_headers_elf64(char *elfptr,
size_t elfsz,
+ size_t elfnotes_sz,
struct list_head *vc_list)
{
int i;
@@ -425,32 +705,38 @@ static int __init process_ptload_program_headers_elf64(char *elfptr,
ehdr_ptr = (Elf64_Ehdr *)elfptr;
phdr_ptr = (Elf64_Phdr*)(elfptr + sizeof(Elf64_Ehdr)); /* PT_NOTE hdr */
- /* First program header is PT_NOTE header. */
- vmcore_off = sizeof(Elf64_Ehdr) +
- (ehdr_ptr->e_phnum) * sizeof(Elf64_Phdr) +
- phdr_ptr->p_memsz; /* Note sections */
+ /* Skip Elf header, program headers and Elf note segment. */
+ vmcore_off = elfsz + elfnotes_sz;
for (i = 0; i < ehdr_ptr->e_phnum; i++, phdr_ptr++) {
+ u64 paddr, start, end, size;
+
if (phdr_ptr->p_type != PT_LOAD)
continue;
+ paddr = phdr_ptr->p_offset;
+ start = rounddown(paddr, PAGE_SIZE);
+ end = roundup(paddr + phdr_ptr->p_memsz, PAGE_SIZE);
+ size = end - start;
+
/* Add this contiguous chunk of memory to vmcore list.*/
new = get_new_element();
if (!new)
return -ENOMEM;
- new->paddr = phdr_ptr->p_offset;
- new->size = phdr_ptr->p_memsz;
+ new->paddr = start;
+ new->size = size;
list_add_tail(&new->list, vc_list);
/* Update the program header offset. */
- phdr_ptr->p_offset = vmcore_off;
- vmcore_off = vmcore_off + phdr_ptr->p_memsz;
+ phdr_ptr->p_offset = vmcore_off + (paddr - start);
+ vmcore_off = vmcore_off + size;
}
return 0;
}
static int __init process_ptload_program_headers_elf32(char *elfptr,
size_t elfsz,
+ size_t elfnotes_sz,
struct list_head *vc_list)
{
int i;
@@ -462,43 +748,44 @@ static int __init process_ptload_program_headers_elf32(char *elfptr,
ehdr_ptr = (Elf32_Ehdr *)elfptr;
phdr_ptr = (Elf32_Phdr*)(elfptr + sizeof(Elf32_Ehdr)); /* PT_NOTE hdr */
- /* First program header is PT_NOTE header. */
- vmcore_off = sizeof(Elf32_Ehdr) +
- (ehdr_ptr->e_phnum) * sizeof(Elf32_Phdr) +
- phdr_ptr->p_memsz; /* Note sections */
+ /* Skip Elf header, program headers and Elf note segment. */
+ vmcore_off = elfsz + elfnotes_sz;
for (i = 0; i < ehdr_ptr->e_phnum; i++, phdr_ptr++) {
+ u64 paddr, start, end, size;
+
if (phdr_ptr->p_type != PT_LOAD)
continue;
+ paddr = phdr_ptr->p_offset;
+ start = rounddown(paddr, PAGE_SIZE);
+ end = roundup(paddr + phdr_ptr->p_memsz, PAGE_SIZE);
+ size = end - start;
+
/* Add this contiguous chunk of memory to vmcore list.*/
new = get_new_element();
if (!new)
return -ENOMEM;
- new->paddr = phdr_ptr->p_offset;
- new->size = phdr_ptr->p_memsz;
+ new->paddr = start;
+ new->size = size;
list_add_tail(&new->list, vc_list);
/* Update the program header offset */
- phdr_ptr->p_offset = vmcore_off;
- vmcore_off = vmcore_off + phdr_ptr->p_memsz;
+ phdr_ptr->p_offset = vmcore_off + (paddr - start);
+ vmcore_off = vmcore_off + size;
}
return 0;
}
/* Sets offset fields of vmcore elements. */
-static void __init set_vmcore_list_offsets_elf64(char *elfptr,
- struct list_head *vc_list)
+static void __init set_vmcore_list_offsets(size_t elfsz, size_t elfnotes_sz,
+ struct list_head *vc_list)
{
loff_t vmcore_off;
- Elf64_Ehdr *ehdr_ptr;
struct vmcore *m;
- ehdr_ptr = (Elf64_Ehdr *)elfptr;
-
- /* Skip Elf header and program headers. */
- vmcore_off = sizeof(Elf64_Ehdr) +
- (ehdr_ptr->e_phnum) * sizeof(Elf64_Phdr);
+ /* Skip Elf header, program headers and Elf note segment. */
+ vmcore_off = elfsz + elfnotes_sz;
list_for_each_entry(m, vc_list, list) {
m->offset = vmcore_off;
@@ -506,24 +793,12 @@ static void __init set_vmcore_list_offsets_elf64(char *elfptr,
}
}
-/* Sets offset fields of vmcore elements. */
-static void __init set_vmcore_list_offsets_elf32(char *elfptr,
- struct list_head *vc_list)
+static void free_elfcorebuf(void)
{
- loff_t vmcore_off;
- Elf32_Ehdr *ehdr_ptr;
- struct vmcore *m;
-
- ehdr_ptr = (Elf32_Ehdr *)elfptr;
-
- /* Skip Elf header and program headers. */
- vmcore_off = sizeof(Elf32_Ehdr) +
- (ehdr_ptr->e_phnum) * sizeof(Elf32_Phdr);
-
- list_for_each_entry(m, vc_list, list) {
- m->offset = vmcore_off;
- vmcore_off += m->size;
- }
+ free_pages((unsigned long)elfcorebuf, get_order(elfcorebuf_sz_orig));
+ elfcorebuf = NULL;
+ vfree(elfnotes_buf);
+ elfnotes_buf = NULL;
}
static int __init parse_crash_elf64_headers(void)
@@ -554,31 +829,32 @@ static int __init parse_crash_elf64_headers(void)
}
/* Read in all elf headers. */
- elfcorebuf_sz = sizeof(Elf64_Ehdr) + ehdr.e_phnum * sizeof(Elf64_Phdr);
- elfcorebuf = kmalloc(elfcorebuf_sz, GFP_KERNEL);
+ elfcorebuf_sz_orig = sizeof(Elf64_Ehdr) +
+ ehdr.e_phnum * sizeof(Elf64_Phdr);
+ elfcorebuf_sz = elfcorebuf_sz_orig;
+ elfcorebuf = (void *)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
+ get_order(elfcorebuf_sz_orig));
if (!elfcorebuf)
return -ENOMEM;
addr = elfcorehdr_addr;
- rc = read_from_oldmem(elfcorebuf, elfcorebuf_sz, &addr, 0);
- if (rc < 0) {
- kfree(elfcorebuf);
- return rc;
- }
+ rc = read_from_oldmem(elfcorebuf, elfcorebuf_sz_orig, &addr, 0);
+ if (rc < 0)
+ goto fail;
/* Merge all PT_NOTE headers into one. */
- rc = merge_note_headers_elf64(elfcorebuf, &elfcorebuf_sz, &vmcore_list);
- if (rc) {
- kfree(elfcorebuf);
- return rc;
- }
+ rc = merge_note_headers_elf64(elfcorebuf, &elfcorebuf_sz,
+ &elfnotes_buf, &elfnotes_sz);
+ if (rc)
+ goto fail;
rc = process_ptload_program_headers_elf64(elfcorebuf, elfcorebuf_sz,
- &vmcore_list);
- if (rc) {
- kfree(elfcorebuf);
- return rc;
- }
- set_vmcore_list_offsets_elf64(elfcorebuf, &vmcore_list);
+ elfnotes_sz, &vmcore_list);
+ if (rc)
+ goto fail;
+ set_vmcore_list_offsets(elfcorebuf_sz, elfnotes_sz, &vmcore_list);
return 0;
+fail:
+ free_elfcorebuf();
+ return rc;
}
static int __init parse_crash_elf32_headers(void)
@@ -609,31 +885,31 @@ static int __init parse_crash_elf32_headers(void)
}
/* Read in all elf headers. */
- elfcorebuf_sz = sizeof(Elf32_Ehdr) + ehdr.e_phnum * sizeof(Elf32_Phdr);
- elfcorebuf = kmalloc(elfcorebuf_sz, GFP_KERNEL);
+ elfcorebuf_sz_orig = sizeof(Elf32_Ehdr) + ehdr.e_phnum * sizeof(Elf32_Phdr);
+ elfcorebuf_sz = elfcorebuf_sz_orig;
+ elfcorebuf = (void *)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
+ get_order(elfcorebuf_sz_orig));
if (!elfcorebuf)
return -ENOMEM;
addr = elfcorehdr_addr;
- rc = read_from_oldmem(elfcorebuf, elfcorebuf_sz, &addr, 0);
- if (rc < 0) {
- kfree(elfcorebuf);
- return rc;
- }
+ rc = read_from_oldmem(elfcorebuf, elfcorebuf_sz_orig, &addr, 0);
+ if (rc < 0)
+ goto fail;
/* Merge all PT_NOTE headers into one. */
- rc = merge_note_headers_elf32(elfcorebuf, &elfcorebuf_sz, &vmcore_list);
- if (rc) {
- kfree(elfcorebuf);
- return rc;
- }
+ rc = merge_note_headers_elf32(elfcorebuf, &elfcorebuf_sz,
+ &elfnotes_buf, &elfnotes_sz);
+ if (rc)
+ goto fail;
rc = process_ptload_program_headers_elf32(elfcorebuf, elfcorebuf_sz,
- &vmcore_list);
- if (rc) {
- kfree(elfcorebuf);
- return rc;
- }
- set_vmcore_list_offsets_elf32(elfcorebuf, &vmcore_list);
+ elfnotes_sz, &vmcore_list);
+ if (rc)
+ goto fail;
+ set_vmcore_list_offsets(elfcorebuf_sz, elfnotes_sz, &vmcore_list);
return 0;
+fail:
+ free_elfcorebuf();
+ return rc;
}
static int __init parse_crash_elf_headers(void)
@@ -655,20 +931,19 @@ static int __init parse_crash_elf_headers(void)
rc = parse_crash_elf64_headers();
if (rc)
return rc;
-
- /* Determine vmcore size. */
- vmcore_size = get_vmcore_size_elf64(elfcorebuf);
} else if (e_ident[EI_CLASS] == ELFCLASS32) {
rc = parse_crash_elf32_headers();
if (rc)
return rc;
-
- /* Determine vmcore size. */
- vmcore_size = get_vmcore_size_elf32(elfcorebuf);
} else {
pr_warn("Warning: Core image elf header is not sane\n");
return -EINVAL;
}
+
+ /* Determine vmcore size. */
+ vmcore_size = get_vmcore_size(elfcorebuf_sz, elfnotes_sz,
+ &vmcore_list);
+
return 0;
}
@@ -711,7 +986,6 @@ void vmcore_cleanup(void)
list_del(&m->list);
kfree(m);
}
- kfree(elfcorebuf);
- elfcorebuf = NULL;
+ free_elfcorebuf();
}
EXPORT_SYMBOL_GPL(vmcore_cleanup);
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