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-rw-r--r--fs/exfat/file.c103
1 files changed, 99 insertions, 4 deletions
diff --git a/fs/exfat/file.c b/fs/exfat/file.c
index 32395ef686..bfdfafe009 100644
--- a/fs/exfat/file.c
+++ b/fs/exfat/file.c
@@ -8,6 +8,9 @@
#include <linux/cred.h>
#include <linux/buffer_head.h>
#include <linux/blkdev.h>
+#include <linux/fsnotify.h>
+#include <linux/security.h>
+#include <linux/msdos_fs.h>
#include "exfat_raw.h"
#include "exfat_fs.h"
@@ -22,7 +25,7 @@ static int exfat_cont_expand(struct inode *inode, loff_t size)
if (err)
return err;
- inode->i_mtime = inode_set_ctime_current(inode);
+ inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode));
mark_inode_dirty(inode);
if (!IS_SYNC(inode))
@@ -144,7 +147,7 @@ int __exfat_truncate(struct inode *inode)
}
if (ei->type == TYPE_FILE)
- ei->attr |= ATTR_ARCHIVE;
+ ei->attr |= EXFAT_ATTR_ARCHIVE;
/*
* update the directory entry
@@ -290,10 +293,10 @@ int exfat_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
}
if (attr->ia_valid & ATTR_SIZE)
- inode->i_mtime = inode_set_ctime_current(inode);
+ inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode));
setattr_copy(&nop_mnt_idmap, inode, attr);
- exfat_truncate_atime(&inode->i_atime);
+ exfat_truncate_inode_atime(inode);
if (attr->ia_valid & ATTR_SIZE) {
error = exfat_block_truncate_page(inode, attr->ia_size);
@@ -316,6 +319,93 @@ out:
return error;
}
+/*
+ * modified ioctls from fat/file.c by Welmer Almesberger
+ */
+static int exfat_ioctl_get_attributes(struct inode *inode, u32 __user *user_attr)
+{
+ u32 attr;
+
+ inode_lock_shared(inode);
+ attr = exfat_make_attr(inode);
+ inode_unlock_shared(inode);
+
+ return put_user(attr, user_attr);
+}
+
+static int exfat_ioctl_set_attributes(struct file *file, u32 __user *user_attr)
+{
+ struct inode *inode = file_inode(file);
+ struct exfat_sb_info *sbi = EXFAT_SB(inode->i_sb);
+ int is_dir = S_ISDIR(inode->i_mode);
+ u32 attr, oldattr;
+ struct iattr ia;
+ int err;
+
+ err = get_user(attr, user_attr);
+ if (err)
+ goto out;
+
+ err = mnt_want_write_file(file);
+ if (err)
+ goto out;
+ inode_lock(inode);
+
+ oldattr = exfat_make_attr(inode);
+
+ /*
+ * Mask attributes so we don't set reserved fields.
+ */
+ attr &= (EXFAT_ATTR_READONLY | EXFAT_ATTR_HIDDEN | EXFAT_ATTR_SYSTEM |
+ EXFAT_ATTR_ARCHIVE);
+ attr |= (is_dir ? EXFAT_ATTR_SUBDIR : 0);
+
+ /* Equivalent to a chmod() */
+ ia.ia_valid = ATTR_MODE | ATTR_CTIME;
+ ia.ia_ctime = current_time(inode);
+ if (is_dir)
+ ia.ia_mode = exfat_make_mode(sbi, attr, 0777);
+ else
+ ia.ia_mode = exfat_make_mode(sbi, attr, 0666 | (inode->i_mode & 0111));
+
+ /* The root directory has no attributes */
+ if (inode->i_ino == EXFAT_ROOT_INO && attr != EXFAT_ATTR_SUBDIR) {
+ err = -EINVAL;
+ goto out_unlock_inode;
+ }
+
+ if (((attr | oldattr) & EXFAT_ATTR_SYSTEM) &&
+ !capable(CAP_LINUX_IMMUTABLE)) {
+ err = -EPERM;
+ goto out_unlock_inode;
+ }
+
+ /*
+ * The security check is questionable... We single
+ * out the RO attribute for checking by the security
+ * module, just because it maps to a file mode.
+ */
+ err = security_inode_setattr(file_mnt_idmap(file),
+ file->f_path.dentry, &ia);
+ if (err)
+ goto out_unlock_inode;
+
+ /* This MUST be done before doing anything irreversible... */
+ err = exfat_setattr(file_mnt_idmap(file), file->f_path.dentry, &ia);
+ if (err)
+ goto out_unlock_inode;
+
+ fsnotify_change(file->f_path.dentry, ia.ia_valid);
+
+ exfat_save_attr(inode, attr);
+ mark_inode_dirty(inode);
+out_unlock_inode:
+ inode_unlock(inode);
+ mnt_drop_write_file(file);
+out:
+ return err;
+}
+
static int exfat_ioctl_fitrim(struct inode *inode, unsigned long arg)
{
struct fstrim_range range;
@@ -346,8 +436,13 @@ static int exfat_ioctl_fitrim(struct inode *inode, unsigned long arg)
long exfat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
struct inode *inode = file_inode(filp);
+ u32 __user *user_attr = (u32 __user *)arg;
switch (cmd) {
+ case FAT_IOCTL_GET_ATTRIBUTES:
+ return exfat_ioctl_get_attributes(inode, user_attr);
+ case FAT_IOCTL_SET_ATTRIBUTES:
+ return exfat_ioctl_set_attributes(filp, user_attr);
case FITRIM:
return exfat_ioctl_fitrim(inode, arg);
default: