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path: root/fs/ext4/ioctl.c
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Diffstat (limited to 'fs/ext4/ioctl.c')
-rw-r--r--fs/ext4/ioctl.c134
1 files changed, 95 insertions, 39 deletions
diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index bf5ae8ebbc97..a4273ddb9922 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -15,7 +15,8 @@
#include <linux/file.h>
#include <linux/quotaops.h>
#include <linux/uuid.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
+#include <linux/delay.h>
#include "ext4_jbd2.h"
#include "ext4.h"
@@ -153,7 +154,7 @@ static long swap_inode_boot_loader(struct super_block *sb,
swap_inode_data(inode, inode_bl);
- inode->i_ctime = inode_bl->i_ctime = ext4_current_time(inode);
+ inode->i_ctime = inode_bl->i_ctime = current_time(inode);
spin_lock(&sbi->s_next_gen_lock);
inode->i_generation = sbi->s_next_generation++;
@@ -191,6 +192,7 @@ journal_err_out:
return err;
}
+#ifdef CONFIG_EXT4_FS_ENCRYPTION
static int uuid_is_zero(__u8 u[16])
{
int i;
@@ -200,6 +202,7 @@ static int uuid_is_zero(__u8 u[16])
return 0;
return 1;
}
+#endif
static int ext4_ioctl_setflags(struct inode *inode,
unsigned int flags)
@@ -248,8 +251,11 @@ static int ext4_ioctl_setflags(struct inode *inode,
err = -EOPNOTSUPP;
goto flags_out;
}
- } else if (oldflags & EXT4_EOFBLOCKS_FL)
- ext4_truncate(inode);
+ } else if (oldflags & EXT4_EOFBLOCKS_FL) {
+ err = ext4_truncate(inode);
+ if (err)
+ goto flags_out;
+ }
handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
if (IS_ERR(handle)) {
@@ -265,6 +271,9 @@ static int ext4_ioctl_setflags(struct inode *inode,
for (i = 0, mask = 1; i < 32; i++, mask <<= 1) {
if (!(mask & EXT4_FL_USER_MODIFIABLE))
continue;
+ /* These flags get special treatment later */
+ if (mask == EXT4_JOURNAL_DATA_FL || mask == EXT4_EXTENTS_FL)
+ continue;
if (mask & flags)
ext4_set_inode_flag(inode, i);
else
@@ -272,7 +281,7 @@ static int ext4_ioctl_setflags(struct inode *inode,
}
ext4_set_inode_flags(inode);
- inode->i_ctime = ext4_current_time(inode);
+ inode->i_ctime = current_time(inode);
err = ext4_mark_iloc_dirty(handle, inode, &iloc);
flags_err:
@@ -368,7 +377,7 @@ static int ext4_ioctl_setproject(struct file *filp, __u32 projid)
}
EXT4_I(inode)->i_projid = kprojid;
- inode->i_ctime = ext4_current_time(inode);
+ inode->i_ctime = current_time(inode);
out_dirty:
rc = ext4_mark_iloc_dirty(handle, inode, &iloc);
if (!err)
@@ -409,6 +418,10 @@ static inline __u32 ext4_iflags_to_xflags(unsigned long iflags)
return xflags;
}
+#define EXT4_SUPPORTED_FS_XFLAGS (FS_XFLAG_SYNC | FS_XFLAG_IMMUTABLE | \
+ FS_XFLAG_APPEND | FS_XFLAG_NODUMP | \
+ FS_XFLAG_NOATIME | FS_XFLAG_PROJINHERIT)
+
/* Transfer xflags flags to internal */
static inline unsigned long ext4_xflags_to_iflags(__u32 xflags)
{
@@ -430,6 +443,52 @@ static inline unsigned long ext4_xflags_to_iflags(__u32 xflags)
return iflags;
}
+int ext4_shutdown(struct super_block *sb, unsigned long arg)
+{
+ struct ext4_sb_info *sbi = EXT4_SB(sb);
+ __u32 flags;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (get_user(flags, (__u32 __user *)arg))
+ return -EFAULT;
+
+ if (flags > EXT4_GOING_FLAGS_NOLOGFLUSH)
+ return -EINVAL;
+
+ if (ext4_forced_shutdown(sbi))
+ return 0;
+
+ ext4_msg(sb, KERN_ALERT, "shut down requested (%d)", flags);
+
+ switch (flags) {
+ case EXT4_GOING_FLAGS_DEFAULT:
+ freeze_bdev(sb->s_bdev);
+ set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
+ thaw_bdev(sb->s_bdev, sb);
+ break;
+ case EXT4_GOING_FLAGS_LOGFLUSH:
+ set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
+ if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) {
+ (void) ext4_force_commit(sb);
+ jbd2_journal_abort(sbi->s_journal, 0);
+ }
+ break;
+ case EXT4_GOING_FLAGS_NOLOGFLUSH:
+ set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
+ if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) {
+ msleep(100);
+ jbd2_journal_abort(sbi->s_journal, 0);
+ }
+ break;
+ default:
+ return -EINVAL;
+ }
+ clear_opt(sb, DISCARD);
+ return 0;
+}
+
long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
struct inode *inode = file_inode(filp);
@@ -453,12 +512,22 @@ long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
if (get_user(flags, (int __user *) arg))
return -EFAULT;
+ if (flags & ~EXT4_FL_USER_VISIBLE)
+ return -EOPNOTSUPP;
+ /*
+ * chattr(1) grabs flags via GETFLAGS, modifies the result and
+ * passes that to SETFLAGS. So we cannot easily make SETFLAGS
+ * more restrictive than just silently masking off visible but
+ * not settable flags as we always did.
+ */
+ flags &= EXT4_FL_USER_MODIFIABLE;
+ if (ext4_mask_flags(inode->i_mode, flags) != flags)
+ return -EOPNOTSUPP;
+
err = mnt_want_write_file(filp);
if (err)
return err;
- flags = ext4_mask_flags(inode->i_mode, flags);
-
inode_lock(inode);
err = ext4_ioctl_setflags(inode, flags);
inode_unlock(inode);
@@ -500,7 +569,7 @@ long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
}
err = ext4_reserve_inode_write(handle, inode, &iloc);
if (err == 0) {
- inode->i_ctime = ext4_current_time(inode);
+ inode->i_ctime = current_time(inode);
inode->i_generation = generation;
err = ext4_mark_iloc_dirty(handle, inode, &iloc);
}
@@ -765,28 +834,19 @@ resizefs_out:
}
case EXT4_IOC_PRECACHE_EXTENTS:
return ext4_ext_precache(inode);
- case EXT4_IOC_SET_ENCRYPTION_POLICY: {
-#ifdef CONFIG_EXT4_FS_ENCRYPTION
- struct fscrypt_policy policy;
+ case EXT4_IOC_SET_ENCRYPTION_POLICY:
if (!ext4_has_feature_encrypt(sb))
return -EOPNOTSUPP;
+ return fscrypt_ioctl_set_policy(filp, (const void __user *)arg);
- if (copy_from_user(&policy,
- (struct fscrypt_policy __user *)arg,
- sizeof(policy)))
- return -EFAULT;
- return fscrypt_process_policy(filp, &policy);
-#else
- return -EOPNOTSUPP;
-#endif
- }
case EXT4_IOC_GET_ENCRYPTION_PWSALT: {
+#ifdef CONFIG_EXT4_FS_ENCRYPTION
int err, err2;
struct ext4_sb_info *sbi = EXT4_SB(sb);
handle_t *handle;
- if (!ext4_sb_has_crypto(sb))
+ if (!ext4_has_feature_encrypt(sb))
return -EOPNOTSUPP;
if (uuid_is_zero(sbi->s_es->s_encrypt_pw_salt)) {
err = mnt_want_write_file(filp);
@@ -816,24 +876,13 @@ resizefs_out:
sbi->s_es->s_encrypt_pw_salt, 16))
return -EFAULT;
return 0;
- }
- case EXT4_IOC_GET_ENCRYPTION_POLICY: {
-#ifdef CONFIG_EXT4_FS_ENCRYPTION
- struct fscrypt_policy policy;
- int err = 0;
-
- if (!ext4_encrypted_inode(inode))
- return -ENOENT;
- err = fscrypt_get_policy(inode, &policy);
- if (err)
- return err;
- if (copy_to_user((void __user *)arg, &policy, sizeof(policy)))
- return -EFAULT;
- return 0;
#else
return -EOPNOTSUPP;
#endif
}
+ case EXT4_IOC_GET_ENCRYPTION_POLICY:
+ return fscrypt_ioctl_get_policy(filp, (void __user *)arg);
+
case EXT4_IOC_FSGETXATTR:
{
struct fsxattr fa;
@@ -865,13 +914,17 @@ resizefs_out:
if (!inode_owner_or_capable(inode))
return -EACCES;
+ if (fa.fsx_xflags & ~EXT4_SUPPORTED_FS_XFLAGS)
+ return -EOPNOTSUPP;
+
+ flags = ext4_xflags_to_iflags(fa.fsx_xflags);
+ if (ext4_mask_flags(inode->i_mode, flags) != flags)
+ return -EOPNOTSUPP;
+
err = mnt_want_write_file(filp);
if (err)
return err;
- flags = ext4_xflags_to_iflags(fa.fsx_xflags);
- flags = ext4_mask_flags(inode->i_mode, flags);
-
inode_lock(inode);
flags = (ei->i_flags & ~EXT4_FL_XFLAG_VISIBLE) |
(flags & EXT4_FL_XFLAG_VISIBLE);
@@ -887,6 +940,8 @@ resizefs_out:
return 0;
}
+ case EXT4_IOC_SHUTDOWN:
+ return ext4_shutdown(sb, arg);
default:
return -ENOTTY;
}
@@ -953,6 +1008,7 @@ long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
case EXT4_IOC_SET_ENCRYPTION_POLICY:
case EXT4_IOC_GET_ENCRYPTION_PWSALT:
case EXT4_IOC_GET_ENCRYPTION_POLICY:
+ case EXT4_IOC_SHUTDOWN:
break;
default:
return -ENOIOCTLCMD;
generated by cgit v1.2.3 (git 2.46.0) at 2025-09-07 13:44:53 +0000