fs/ntfs3: Implement simple fileattr

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

Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>

diff --git a/fs/ntfs3/file.c b/fs/ntfs3/file.c
index e95e9ff..1ba837b 100644 (file)
--- a/fs/ntfs3/file.c
+++ b/fs/ntfs3/file.c
@@ -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 = {

diff --git a/fs/ntfs3/namei.c b/fs/ntfs3/namei.c
index 7149842..cc04be9 100644 (file)
--- a/fs/ntfs3/namei.c
+++ b/fs/ntfs3/namei.c
@@ -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 = {

diff --git a/fs/ntfs3/ntfs_fs.h b/fs/ntfs3/ntfs_fs.h
index 6240ed7..e5255a2 100644 (file)
--- a/fs/ntfs3/ntfs_fs.h
+++ b/fs/ntfs3/ntfs_fs.h
@@ -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,