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ANDROID: Incremental fs: Separate pseudo-file code

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Also fixed two bugs in the process:

is_pseudo_filename was not previously checking for .log, so an attempt
to create a .log would succeed.

All ioctls could be called on all files. ioctls now set on the correct
files.

Bug: 162856396
Test: incfs_test passes
Signed-off-by: Paul Lawrence <paullawrence@google.com>
Change-Id: I3f1e87d018836f51a97897880dd70181db4f7169
This commit is contained in:
Paul Lawrence
2020-08-20 12:45:41 -07:00
parent 64d434d9ab
commit 8334d69e65
6 changed files with 1152 additions and 1095 deletions
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1
fs/incfs/Makefile
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@@ -6,4 +6,5 @@ incrementalfs-y := \
format.o \ format.o \
integrity.o \ integrity.o \
main.o \ main.o \
pseudo_files.o \
vfs.o vfs.o

1063
fs/incfs/pseudo_files.c Normal file
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File diff suppressed because it is too large Load Diff

15
fs/incfs/pseudo_files.h Normal file
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@@ -0,0 +1,15 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright 2020 Google LLC
*/
#ifndef _INCFS_PSEUDO_FILES_H
#define _INCFS_PSEUDO_FILES_H
#define PSEUDO_FILE_COUNT 2
#define INCFS_START_INO_RANGE 10
int dir_lookup_pseudo_files(struct super_block *sb, struct dentry *dentry);
int emit_pseudo_files(struct dir_context *ctx);
#endif

1140
fs/incfs/vfs.c
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File diff suppressed because it is too large Load Diff

25
fs/incfs/vfs.h
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@@ -6,8 +6,33 @@
#ifndef _INCFS_VFS_H #ifndef _INCFS_VFS_H
#define _INCFS_VFS_H #define _INCFS_VFS_H
enum FILL_PERMISSION {
CANT_FILL = 0,
CAN_FILL = 1,
};
extern const struct file_operations incfs_file_ops;
extern const struct inode_operations incfs_file_inode_ops;
void incfs_kill_sb(struct super_block *sb); void incfs_kill_sb(struct super_block *sb);
struct dentry *incfs_mount_fs(struct file_system_type *type, int flags, struct dentry *incfs_mount_fs(struct file_system_type *type, int flags,
const char *dev_name, void *data); const char *dev_name, void *data);
int incfs_link(struct dentry *what, struct dentry *where);
int incfs_unlink(struct dentry *dentry);
static inline struct mount_info *get_mount_info(struct super_block *sb)
{
struct mount_info *result = sb->s_fs_info;
WARN_ON(!result);
return result;
}
static inline struct super_block *file_superblock(struct file *f)
{
struct inode *inode = file_inode(f);
return inode->i_sb;
}
#endif #endif

3
tools/testing/selftests/filesystems/incfs/incfs_test.c
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@@ -227,8 +227,7 @@ int open_file_by_id(const char *mnt_dir, incfs_uuid_t id, bool use_ioctl)
goto out; goto out;
} }
if (ioctl(fd, INCFS_IOC_PERMIT_FILL, &permit_fill) != -1 || if (ioctl(fd, INCFS_IOC_PERMIT_FILL, &permit_fill) != -1) {
errno != EPERM) {
print_error( print_error(
"Successfully called PERMIT_FILL on non pending_read file"); "Successfully called PERMIT_FILL on non pending_read file");
return -errno; return -errno;