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kernel-6.12.58

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This commit is contained in:
Rmys
2025-11-14 14:07:20 +03:00
parent 561af621fd
commit 253de26f25
91 changed files with 155064 additions and 127114 deletions
Download Patch File Download Diff File Expand all files Collapse all files
kernel/tools/perf/files/patches/aufs6/aufs6-mmap.patch
+452
View File
@@ -0,0 +1,452 @@
SPDX-License-Identifier: GPL-2.0
aufs6.12 mmap patch
diff --git a/fs/proc/base.c b/fs/proc/base.c
index b31283d81c52e..644bd3d84cf76 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -2270,7 +2270,7 @@ static int map_files_get_link(struct dentry *dentry, struct path *path)
rc = -ENOENT;
vma = find_exact_vma(mm, vm_start, vm_end);
if (vma && vma->vm_file) {
- *path = *file_user_path(vma->vm_file);
+ *path = vma_pr_or_file(vma)->f_path;
path_get(path);
rc = 0;
}
diff --git a/fs/proc/nommu.c b/fs/proc/nommu.c
index c6e7ebc637562..d7ccfd9097646 100644
--- a/fs/proc/nommu.c
+++ b/fs/proc/nommu.c
@@ -39,7 +39,10 @@ static int nommu_region_show(struct seq_file *m, struct vm_region *region)
file = region->vm_file;
if (file) {
- struct inode *inode = file_inode(region->vm_file);
+ struct inode *inode;
+
+ file = vmr_pr_or_file(region);
+ inode = file_inode(file);
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 7eb010de39fe2..0c576103f7f15 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -264,7 +264,8 @@ static void get_vma_name(struct vm_area_struct *vma,
*name_fmt = "[anon_shmem:%s]";
*name = anon_name->name;
} else {
- *path = file_user_path(vma->vm_file);
+ struct file *f = vma_pr_or_file(vma);
+ *path = file_user_path(f);
}
return;
}
@@ -333,7 +334,8 @@ show_map_vma(struct seq_file *m, struct vm_area_struct *vma)
dev_t dev = 0;
if (vma->vm_file) {
- const struct inode *inode = file_user_inode(vma->vm_file);
+ const struct inode *inode
+ = file_inode(vma_pr_or_file(vma));
dev = inode->i_sb->s_dev;
ino = inode->i_ino;
@@ -3008,7 +3010,7 @@ static int show_numa_map(struct seq_file *m, void *v)
struct proc_maps_private *proc_priv = &numa_priv->proc_maps;
struct vm_area_struct *vma = v;
struct numa_maps *md = &numa_priv->md;
- struct file *file = vma->vm_file;
+ struct file *file = vma_pr_or_file(vma);
struct mm_struct *mm = vma->vm_mm;
char buffer[64];
struct mempolicy *pol;
diff --git a/fs/proc/task_nommu.c b/fs/proc/task_nommu.c
index bce6745330003..b12b5a75c799c 100644
--- a/fs/proc/task_nommu.c
+++ b/fs/proc/task_nommu.c
@@ -137,7 +137,10 @@ static int nommu_vma_show(struct seq_file *m, struct vm_area_struct *vma)
file = vma->vm_file;
if (file) {
- struct inode *inode = file_inode(vma->vm_file);
+ struct inode *inode;
+
+ file = vma_pr_or_file(vma);
+ inode = file_inode(file);
dev = inode->i_sb->s_dev;
ino = inode->i_ino;
pgoff = (loff_t)vma->vm_pgoff << PAGE_SHIFT;
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 61fff5d34ed53..94b66987b4bb0 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2469,6 +2469,43 @@ static inline void unmap_shared_mapping_range(struct address_space *mapping,
static inline struct vm_area_struct *vma_lookup(struct mm_struct *mm,
unsigned long addr);
+#if 1 /* IS_ENABLED(CONFIG_AUFS_FS) */
+extern void vma_do_file_update_time(struct vm_area_struct *, const char[], int);
+extern struct file *vma_do_pr_or_file(struct vm_area_struct *, const char[],
+ int);
+extern void vma_do_get_file(struct vm_area_struct *, const char[], int);
+extern void vma_do_fput(struct vm_area_struct *, const char[], int);
+
+#define vma_file_update_time(vma) vma_do_file_update_time(vma, __func__, \
+ __LINE__)
+#define vma_pr_or_file(vma) vma_do_pr_or_file(vma, __func__, \
+ __LINE__)
+#define vma_get_file(vma) vma_do_get_file(vma, __func__, __LINE__)
+#define vma_fput(vma) vma_do_fput(vma, __func__, __LINE__)
+
+#ifndef CONFIG_MMU
+extern struct file *vmr_do_pr_or_file(struct vm_region *, const char[], int);
+extern void vmr_do_fput(struct vm_region *, const char[], int);
+
+#define vmr_pr_or_file(region) vmr_do_pr_or_file(region, __func__, \
+ __LINE__)
+#define vmr_fput(region) vmr_do_fput(region, __func__, __LINE__)
+#endif /* !CONFIG_MMU */
+
+#else
+
+#define vma_file_update_time(vma) file_update_time((vma)->vm_file)
+#define vma_pr_or_file(vma) (vma)->vm_file
+#define vma_get_file(vma) get_file((vma)->vm_file)
+#define vma_fput(vma) fput((vma)->vm_file)
+
+#ifndef CONFIG_MMU
+#define vmr_pr_or_file(region) (region)->vm_file
+#define vmr_fput(region) fput((region)->vm_file)
+#endif /* !CONFIG_MMU */
+
+#endif /* CONFIG_AUFS_FS */
+
extern int access_process_vm(struct task_struct *tsk, unsigned long addr,
void *buf, int len, unsigned int gup_flags);
extern int access_remote_vm(struct mm_struct *mm, unsigned long addr,
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 6e3bdf8e38bca..c70247dc71022 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -572,6 +572,9 @@ 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 */
+#if 1 /* IS_ENABLED(CONFIG_AUFS_FS) */
+ struct file *vm_prfile; /* the virtual backing file or NULL */
+#endif
int vm_usage; /* region usage count (access under nommu_region_sem) */
bool vm_icache_flushed : 1; /* true if the icache has been flushed for
@@ -747,6 +750,9 @@ struct vm_area_struct {
unsigned long vm_pgoff; /* Offset (within vm_file) in PAGE_SIZE
units */
struct file * vm_file; /* File we map to (can be NULL). */
+#if 1 /* IS_ENABLED(CONFIG_AUFS_FS) */
+ struct file *vm_prfile; /* shadow of vm_file */
+#endif
void * vm_private_data; /* was vm_pte (shared mem) */
#ifdef CONFIG_ANON_VMA_NAME
diff --git a/kernel/fork.c b/kernel/fork.c
index 22f43721d031d..03abd72b3353d 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -730,7 +730,7 @@ static __latent_entropy int dup_mmap(struct mm_struct *mm,
if (file) {
struct address_space *mapping = file->f_mapping;
- get_file(file);
+ vma_get_file(tmp);
i_mmap_lock_write(mapping);
if (vma_is_shared_maywrite(tmp))
mapping_allow_writable(mapping);
diff --git a/mm/Makefile b/mm/Makefile
index d5639b0361663..bb57f616f0325 100644
--- a/mm/Makefile
+++ b/mm/Makefile
@@ -145,3 +145,4 @@ obj-$(CONFIG_GENERIC_IOREMAP) += ioremap.o
obj-$(CONFIG_SHRINKER_DEBUG) += shrinker_debug.o
obj-$(CONFIG_EXECMEM) += execmem.o
obj-$(CONFIG_TMPFS_QUOTA) += shmem_quota.o
+obj-y += prfile.o
diff --git a/mm/filemap.c b/mm/filemap.c
index 56fa431c52af7..d55fe4e7bcfd1 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -3707,7 +3707,7 @@ vm_fault_t filemap_page_mkwrite(struct vm_fault *vmf)
vm_fault_t ret = VM_FAULT_LOCKED;
sb_start_pagefault(mapping->host->i_sb);
- file_update_time(vmf->vma->vm_file);
+ vma_file_update_time(vmf->vma);
folio_lock(folio);
if (folio->mapping != mapping) {
folio_unlock(folio);
diff --git a/mm/mmap.c b/mm/mmap.c
index 79d541f1502b2..2dc64f6dc0181 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1484,7 +1484,7 @@ static unsigned long __mmap_region(struct file *file, unsigned long addr,
* and cause general protection fault
* ultimately.
*/
- fput(vma->vm_file);
+ vma_fput(vma);
vm_area_free(vma);
vma = merge;
/* Update vm_flags to pick up the change. */
@@ -1654,6 +1654,7 @@ SYSCALL_DEFINE5(remap_file_pages, unsigned long, start, unsigned long, size,
unsigned long ret = -EINVAL;
struct file *file;
vm_flags_t vm_flags;
+ struct file *prfile = NULL; /* aufs */
pr_warn_once("%s (%d) uses deprecated remap_file_pages() syscall. See Documentation/mm/remap_file_pages.rst.\n",
current->comm, current->pid);
@@ -1696,14 +1697,18 @@ SYSCALL_DEFINE5(remap_file_pages, unsigned long, start, unsigned long, size,
/* Save vm_flags used to calculate prot and flags, and recheck later. */
vm_flags = vma->vm_flags;
- file = get_file(vma->vm_file);
+ vma_get_file(vma);
+ file = vma->vm_file;
+#if 1 /* IS_ENABLED(CONFIG_AUFS_FS) */
+ prfile = vma->vm_prfile;
+#endif
mmap_read_unlock(mm);
/* Call outside mmap_lock to be consistent with other callers. */
ret = security_mmap_file(file, prot, flags);
if (ret) {
- fput(file);
+ vma_fput(vma);
return ret;
}
@@ -1711,7 +1716,7 @@ SYSCALL_DEFINE5(remap_file_pages, unsigned long, start, unsigned long, size,
/* OK security check passed, take write lock + let it rip. */
if (mmap_write_lock_killable(mm)) {
- fput(file);
+ vma_fput(vma);
return -EINTR;
}
@@ -1753,9 +1758,27 @@ SYSCALL_DEFINE5(remap_file_pages, unsigned long, start, unsigned long, size,
ret = do_mmap(vma->vm_file, start, size,
prot, flags, 0, pgoff, &populate, NULL);
+#if 1 /* IS_ENABLED(CONFIG_AUFS_FS) */
+ if (!IS_ERR_VALUE(ret) && file && prfile) {
+ struct vm_area_struct *new_vma;
+
+ new_vma = find_vma(mm, ret);
+ if (!new_vma->vm_prfile)
+ new_vma->vm_prfile = prfile;
+ if (prfile)
+ get_file(prfile);
+ }
+#endif
+
out:
mmap_write_unlock(mm);
+ /*
+ * two fput()s instead of vma_fput(vma),
+ * coz vma may not be available anymore.
+ */
fput(file);
+ if (prfile)
+ fput(prfile);
if (populate)
mm_populate(ret, populate);
if (!IS_ERR_VALUE(ret))
diff --git a/mm/nommu.c b/mm/nommu.c
index 9cb6e99215e2b..5add36afa9786 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -512,7 +512,7 @@ static void __put_nommu_region(struct vm_region *region)
up_write(&nommu_region_sem);
if (region->vm_file)
- fput(region->vm_file);
+ vmr_fput(region);
/* IO memory and memory shared directly out of the pagecache
* from ramfs/tmpfs mustn't be released here */
@@ -591,7 +591,7 @@ static void delete_vma(struct mm_struct *mm, struct vm_area_struct *vma)
{
vma_close(vma);
if (vma->vm_file)
- fput(vma->vm_file);
+ vma_fput(vma);
put_nommu_region(vma->vm_region);
vm_area_free(vma);
}
@@ -1123,7 +1123,7 @@ unsigned long do_mmap(struct file *file,
goto error_just_free;
}
}
- fput(region->vm_file);
+ vmr_fput(region);
kmem_cache_free(vm_region_jar, region);
region = pregion;
result = start;
@@ -1209,10 +1209,10 @@ unsigned long do_mmap(struct file *file,
error:
vma_iter_free(&vmi);
if (region->vm_file)
- fput(region->vm_file);
+ vmr_fput(region);
kmem_cache_free(vm_region_jar, region);
if (vma->vm_file)
- fput(vma->vm_file);
+ vma_fput(vma);
vm_area_free(vma);
return ret;
diff --git a/mm/prfile.c b/mm/prfile.c
new file mode 100644
index 0000000000000..b034d160a18f4
--- /dev/null
+++ b/mm/prfile.c
@@ -0,0 +1,86 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Mainly for aufs which mmap(2) different file and wants to print different
+ * path in /proc/PID/maps.
+ * Call these functions via macros defined in linux/mm.h.
+ *
+ * See Documentation/filesystems/aufs/design/06mmap.txt
+ *
+ * Copyright (c) 2014-2025 Junjro R. Okajima
+ * Copyright (c) 2014 Ian Campbell
+ */
+
+#include <linux/mm.h>
+#include <linux/file.h>
+#include <linux/fs.h>
+
+/* #define PRFILE_TRACE */
+static inline void prfile_trace(struct file *f, struct file *pr,
+ const char func[], int line, const char func2[])
+{
+#ifdef PRFILE_TRACE
+ if (pr)
+ pr_info("%s:%d: %s, %pD2\n", func, line, func2, f);
+#endif
+}
+
+void vma_do_file_update_time(struct vm_area_struct *vma, const char func[],
+ int line)
+{
+ struct file *f = vma->vm_file, *pr = vma->vm_prfile;
+
+ prfile_trace(f, pr, func, line, __func__);
+ file_update_time(f);
+ if (f && pr)
+ file_update_time(pr);
+}
+
+struct file *vma_do_pr_or_file(struct vm_area_struct *vma, const char func[],
+ int line)
+{
+ struct file *f = vma->vm_file, *pr = vma->vm_prfile;
+
+ prfile_trace(f, pr, func, line, __func__);
+ return (f && pr) ? pr : f;
+}
+
+void vma_do_get_file(struct vm_area_struct *vma, const char func[], int line)
+{
+ struct file *f = vma->vm_file, *pr = vma->vm_prfile;
+
+ prfile_trace(f, pr, func, line, __func__);
+ get_file(f);
+ if (f && pr)
+ get_file(pr);
+}
+
+void vma_do_fput(struct vm_area_struct *vma, const char func[], int line)
+{
+ struct file *f = vma->vm_file, *pr = vma->vm_prfile;
+
+ prfile_trace(f, pr, func, line, __func__);
+ fput(f);
+ if (f && pr)
+ fput(pr);
+}
+
+#ifndef CONFIG_MMU
+struct file *vmr_do_pr_or_file(struct vm_region *region, const char func[],
+ int line)
+{
+ struct file *f = region->vm_file, *pr = region->vm_prfile;
+
+ prfile_trace(f, pr, func, line, __func__);
+ return (f && pr) ? pr : f;
+}
+
+void vmr_do_fput(struct vm_region *region, const char func[], int line)
+{
+ struct file *f = region->vm_file, *pr = region->vm_prfile;
+
+ prfile_trace(f, pr, func, line, __func__);
+ fput(f);
+ if (f && pr)
+ fput(pr);
+}
+#endif /* !CONFIG_MMU */
diff --git a/mm/vma.c b/mm/vma.c
index 7621384d64cf5..3bb41fe6ac48e 100644
--- a/mm/vma.c
+++ b/mm/vma.c
@@ -248,7 +248,7 @@ static void vma_complete(struct vma_prepare *vp, struct vma_iterator *vmi,
if (vp->file) {
uprobe_munmap(vp->remove, vp->remove->vm_start,
vp->remove->vm_end);
- fput(vp->file);
+ vma_fput(vp->vma);
}
if (vp->remove->anon_vma)
anon_vma_merge(vp->vma, vp->remove);
@@ -328,7 +328,7 @@ void remove_vma(struct vm_area_struct *vma, bool unreachable)
might_sleep();
vma_close(vma);
if (vma->vm_file)
- fput(vma->vm_file);
+ vma_fput(vma);
mpol_put(vma_policy(vma));
if (unreachable)
__vm_area_free(vma);
@@ -405,7 +405,7 @@ static int __split_vma(struct vma_iterator *vmi, struct vm_area_struct *vma,
goto out_free_mpol;
if (new->vm_file)
- get_file(new->vm_file);
+ vma_get_file(new);
if (new->vm_ops && new->vm_ops->open)
new->vm_ops->open(new);
@@ -1671,7 +1671,7 @@ struct vm_area_struct *copy_vma(struct vm_area_struct **vmap,
if (anon_vma_clone(new_vma, vma))
goto out_free_mempol;
if (new_vma->vm_file)
- get_file(new_vma->vm_file);
+ vma_get_file(new_vma);
if (new_vma->vm_ops && new_vma->vm_ops->open)
new_vma->vm_ops->open(new_vma);
if (vma_link(mm, new_vma))
@@ -1684,7 +1684,7 @@ struct vm_area_struct *copy_vma(struct vm_area_struct **vmap,
vma_close(new_vma);
if (new_vma->vm_file)
- fput(new_vma->vm_file);
+ vma_fput(new_vma);
unlink_anon_vmas(new_vma);
out_free_mempol: