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core/linux/aufs3-proc_map.patch

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aufs3.6 proc_map patch
diff --git a/fs/buffer.c b/fs/buffer.c
index 58e2e7b..f314bc2 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -2317,6 +2317,8 @@ int __block_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf,
* fault so this update may be superfluous but who really cares...
*/
file_update_time(vma->vm_file);
+ if (vma->vm_prfile)
+ file_update_time(vma->vm_prfile);
lock_page(page);
size = i_size_read(inode);
diff --git a/fs/proc/nommu.c b/fs/proc/nommu.c
index b1822dd..8b29ab7 100644
--- a/fs/proc/nommu.c
+++ b/fs/proc/nommu.c
@@ -46,6 +46,10 @@ static int nommu_region_show(struct seq_file *m, struct vm_region *region)
if (file) {
struct inode *inode = region->vm_file->f_path.dentry->d_inode;
+ if (region->vm_prfile) {
+ file = region->vm_prfile;
+ inode = file->f_path.dentry->d_inode;
+ }
dev = inode->i_sb->s_dev;
ino = inode->i_ino;
}
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 4540b8f..0411f0f 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -226,6 +226,10 @@ show_map_vma(struct seq_file *m, struct vm_area_struct *vma, int is_pid)
if (file) {
struct inode *inode = vma->vm_file->f_path.dentry->d_inode;
+ if (vma->vm_prfile) {
+ file = vma->vm_prfile;
+ inode = file->f_path.dentry->d_inode;
+ }
dev = inode->i_sb->s_dev;
ino = inode->i_ino;
pgoff = ((loff_t)vma->vm_pgoff) << PAGE_SHIFT;
@@ -1185,6 +1189,8 @@ static int show_numa_map(struct seq_file *m, void *v, int is_pid)
if (file) {
seq_printf(m, " file=");
+ if (vma->vm_prfile)
+ file = vma->vm_prfile;
seq_path(m, &file->f_path, "\n\t= ");
} else if (vma->vm_start <= mm->brk && vma->vm_end >= mm->start_brk) {
seq_printf(m, " heap");
diff --git a/fs/proc/task_nommu.c b/fs/proc/task_nommu.c
index 1ccfa53..c39acb5 100644
--- a/fs/proc/task_nommu.c
+++ b/fs/proc/task_nommu.c
@@ -150,6 +150,10 @@ static int nommu_vma_show(struct seq_file *m, struct vm_area_struct *vma,
if (file) {
struct inode *inode = vma->vm_file->f_path.dentry->d_inode;
+ if (vma->vm_prfile) {
+ file = vma->vm_prfile;
+ inode = file->f_path.dentry->d_inode;
+ }
dev = inode->i_sb->s_dev;
ino = inode->i_ino;
pgoff = (loff_t)vma->vm_pgoff << PAGE_SHIFT;
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index bf78672..cac65b6 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -212,6 +212,7 @@ struct vm_region {
unsigned long vm_top; /* region allocated to here */
unsigned long vm_pgoff; /* the offset in vm_file corresponding to vm_start */
struct file *vm_file; /* the backing file or NULL */
+ struct file *vm_prfile; /* the virtual backing file or NULL */
int vm_usage; /* region usage count (access under nommu_region_sem) */
bool vm_icache_flushed : 1; /* true if the icache has been flushed for
@@ -271,6 +272,7 @@ struct vm_area_struct {
unsigned long vm_pgoff; /* Offset (within vm_file) in PAGE_SIZE
units, *not* PAGE_CACHE_SIZE */
struct file * vm_file; /* File we map to (can be NULL). */
+ struct file *vm_prfile; /* shadow of vm_file */
void * vm_private_data; /* was vm_pte (shared mem) */
#ifndef CONFIG_MMU
diff --git a/kernel/fork.c b/kernel/fork.c
index 2c8857e..3709356 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -414,6 +414,8 @@ static int dup_mmap(struct mm_struct *mm, struct mm_struct *oldmm)
struct address_space *mapping = file->f_mapping;
get_file(file);
+ if (tmp->vm_prfile)
+ get_file(tmp->vm_prfile);
if (tmp->vm_flags & VM_DENYWRITE)
atomic_dec(&inode->i_writecount);
mutex_lock(&mapping->i_mmap_mutex);
diff --git a/mm/memory.c b/mm/memory.c
index 5736170..908963f 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -3355,6 +3355,8 @@ static int __do_fault(struct mm_struct *mm, struct vm_area_struct *vma,
/* file_update_time outside page_lock */
if (vma->vm_file && !page_mkwrite)
file_update_time(vma->vm_file);
+ if (vma->vm_prfile && !page_mkwrite)
+ file_update_time(vma->vm_prfile);
} else {
unlock_page(vmf.page);
if (anon)
diff --git a/mm/mmap.c b/mm/mmap.c
index ae18a48..ab6498a 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -233,6 +233,8 @@ static struct vm_area_struct *remove_vma(struct vm_area_struct *vma)
vma->vm_ops->close(vma);
if (vma->vm_file) {
fput(vma->vm_file);
+ if (vma->vm_prfile)
+ fput(vma->vm_prfile);
if (vma->vm_flags & VM_EXECUTABLE)
removed_exe_file_vma(vma->vm_mm);
}
@@ -636,6 +638,8 @@ again: remove_next = 1 + (end > next->vm_end);
if (file) {
uprobe_munmap(next, next->vm_start, next->vm_end);
fput(file);
+ if (vma->vm_prfile)
+ fput(vma->vm_prfile);
if (next->vm_flags & VM_EXECUTABLE)
removed_exe_file_vma(mm);
}
@@ -1991,6 +1995,8 @@ static int __split_vma(struct mm_struct * mm, struct vm_area_struct * vma,
if (new->vm_file) {
get_file(new->vm_file);
+ if (new->vm_prfile)
+ get_file(new->vm_prfile);
if (vma->vm_flags & VM_EXECUTABLE)
added_exe_file_vma(mm);
}
@@ -2015,6 +2021,8 @@ static int __split_vma(struct mm_struct * mm, struct vm_area_struct * vma,
if (vma->vm_flags & VM_EXECUTABLE)
removed_exe_file_vma(mm);
fput(new->vm_file);
+ if (new->vm_prfile)
+ fput(new->vm_prfile);
}
unlink_anon_vmas(new);
out_free_mpol:
@@ -2412,6 +2420,8 @@ struct vm_area_struct *copy_vma(struct vm_area_struct **vmap,
new_vma->vm_pgoff = pgoff;
if (new_vma->vm_file) {
get_file(new_vma->vm_file);
+ if (new_vma->vm_prfile)
+ get_file(new_vma->vm_prfile);
if (vma->vm_flags & VM_EXECUTABLE)
added_exe_file_vma(mm);
diff --git a/mm/nommu.c b/mm/nommu.c
index d4b0c10..a061091 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -633,6 +633,8 @@ static void __put_nommu_region(struct vm_region *region)
if (region->vm_file)
fput(region->vm_file);
+ if (region->vm_prfile)
+ fput(region->vm_prfile);
/* IO memory and memory shared directly out of the pagecache
* from ramfs/tmpfs mustn't be released here */
@@ -791,6 +793,8 @@ static void delete_vma(struct mm_struct *mm, struct vm_area_struct *vma)
vma->vm_ops->close(vma);
if (vma->vm_file) {
fput(vma->vm_file);
+ if (vma->vm_prfile)
+ fput(vma->vm_prfile);
if (vma->vm_flags & VM_EXECUTABLE)
removed_exe_file_vma(mm);
}
@@ -1363,6 +1367,8 @@ unsigned long do_mmap_pgoff(struct file *file,
}
}
fput(region->vm_file);
+ if (region->vm_prfile)
+ fput(region->vm_prfile);
kmem_cache_free(vm_region_jar, region);
region = pregion;
result = start;
@@ -1439,9 +1445,13 @@ error_just_free:
error:
if (region->vm_file)
fput(region->vm_file);
+ if (region->vm_prfile)
+ fput(region->vm_prfile);
kmem_cache_free(vm_region_jar, region);
if (vma->vm_file)
fput(vma->vm_file);
+ if (vma->vm_prfile)
+ fput(vma->vm_prfile);
if (vma->vm_flags & VM_EXECUTABLE)
removed_exe_file_vma(vma->vm_mm);
kmem_cache_free(vm_area_cachep, vma);
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