unimore/kernel-hacking-2024-linux-steffo
unimore/kernel-hacking-2024-linux-steffo
1
Fork 0
Code Pull requests 5 Wiki Activity

fs/ntfs3: Implement simple fileattr

Browse source 
fileattr added to support chattr.
Supported attributes:  compressed and immutable.

Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
This commit is contained in:
Konstantin Komarov 2024-06-18 17:31:21 +03:00
parent 1ff2e95660
commit 5bfb91c712
No known key found for this signature in database
GPG key ID: A9B0331F832407B6
3 changed files with 76 additions and 5 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

76
fs/ntfs3/file.c
View file

@ -13,6 +13,7 @@
#include <linux/compat.h>
#include <linux/falloc.h>
#include <linux/fiemap.h>
#include <linux/fileattr.h>
#include "debug.h"
#include "ntfs.h"
@ -48,6 +49,62 @@ static int ntfs_ioctl_fitrim(struct ntfs_sb_info *sbi, unsigned long arg)
return 0;
}
/*
* ntfs_fileattr_get - inode_operations::fileattr_get
*/
int ntfs_fileattr_get(struct dentry *dentry, struct fileattr *fa)
{
struct inode *inode = d_inode(dentry);
struct ntfs_inode *ni = ntfs_i(inode);
u32 flags = 0;
if (inode->i_flags & S_IMMUTABLE)
flags |= FS_IMMUTABLE_FL;
if (inode->i_flags & S_APPEND)
flags |= FS_APPEND_FL;
if (is_compressed(ni))
flags |= FS_COMPR_FL;
if (is_encrypted(ni))
flags |= FS_ENCRYPT_FL;
fileattr_fill_flags(fa, flags);
return 0;
}
/*
* ntfs_fileattr_set - inode_operations::fileattr_set
*/
int ntfs_fileattr_set(struct mnt_idmap *idmap, struct dentry *dentry,
struct fileattr *fa)
{
struct inode *inode = d_inode(dentry);
u32 flags = fa->flags;
unsigned int new_fl = 0;
if (fileattr_has_fsx(fa))
return -EOPNOTSUPP;
if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL))
return -EOPNOTSUPP;
if (flags & FS_IMMUTABLE_FL)
new_fl |= S_IMMUTABLE;
if (flags & FS_APPEND_FL)
new_fl |= S_APPEND;
inode_set_flags(inode, new_fl, S_IMMUTABLE | S_APPEND);
inode_set_ctime_current(inode);
mark_inode_dirty(inode);
return 0;
}
long ntfs_ioctl(struct file *filp, u32 cmd, unsigned long arg)
{
struct inode *inode = file_inode(filp);
@ -77,20 +134,27 @@ int ntfs_getattr(struct mnt_idmap *idmap, const struct path *path,
struct inode *inode = d_inode(path->dentry);
struct ntfs_inode *ni = ntfs_i(inode);
stat->result_mask |= STATX_BTIME;
stat->btime = ni->i_crtime;
stat->blksize = ni->mi.sbi->cluster_size; /* 512, 1K, ..., 2M */
if (inode->i_flags & S_IMMUTABLE)
stat->attributes |= STATX_ATTR_IMMUTABLE;
if (inode->i_flags & S_APPEND)
stat->attributes |= STATX_ATTR_APPEND;
if (is_compressed(ni))
stat->attributes |= STATX_ATTR_COMPRESSED;
if (is_encrypted(ni))
stat->attributes |= STATX_ATTR_ENCRYPTED;
stat->attributes_mask |= STATX_ATTR_COMPRESSED | STATX_ATTR_ENCRYPTED;
stat->attributes_mask |= STATX_ATTR_COMPRESSED | STATX_ATTR_ENCRYPTED |
STATX_ATTR_IMMUTABLE | STATX_ATTR_APPEND;
generic_fillattr(idmap, request_mask, inode, stat);
stat->result_mask |= STATX_BTIME;
stat->btime = ni->i_crtime;
stat->blksize = ni->mi.sbi->cluster_size; /* 512, 1K, ..., 2M */
return 0;
}
@ -1223,6 +1287,8 @@ const struct inode_operations ntfs_file_inode_operations = {
.get_acl = ntfs_get_acl,
.set_acl = ntfs_set_acl,
.fiemap = ntfs_fiemap,
.fileattr_get = ntfs_fileattr_get,
.fileattr_set = ntfs_fileattr_set,
};
const struct file_operations ntfs_file_operations = {

2
fs/ntfs3/namei.c
View file

@ -509,6 +509,8 @@ const struct inode_operations ntfs_dir_inode_operations = {
.getattr = ntfs_getattr,
.listxattr = ntfs_listxattr,
.fiemap = ntfs_fiemap,
.fileattr_get = ntfs_fileattr_get,
.fileattr_set = ntfs_fileattr_set,
};
const struct inode_operations ntfs_special_inode_operations = {

3
fs/ntfs3/ntfs_fs.h
View file

@ -497,6 +497,9 @@ extern const struct file_operations ntfs_dir_operations;
extern const struct file_operations ntfs_legacy_dir_operations;
/* Globals from file.c */
int ntfs_fileattr_get(struct dentry *dentry, struct fileattr *fa);
int ntfs_fileattr_set(struct mnt_idmap *idmap, struct dentry *dentry,
struct fileattr *fa);
int ntfs_getattr(struct mnt_idmap *idmap, const struct path *path,
struct kstat *stat, u32 request_mask, u32 flags);
int ntfs3_setattr(struct mnt_idmap *idmap, struct dentry *dentry,