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Diffstat (limited to 'fs/ext4/ioctl.c')
-rw-r--r--fs/ext4/ioctl.c116
1 files changed, 91 insertions, 25 deletions
diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index a56796814d6..6eee25591b8 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -18,6 +18,8 @@
#include "ext4_jbd2.h"
#include "ext4.h"
+#define MAX_32_NUM ((((unsigned long long) 1) << 32) - 1)
+
long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
struct inode *inode = filp->f_dentry->d_inode;
@@ -45,7 +47,7 @@ long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
if (get_user(flags, (int __user *) arg))
return -EFAULT;
- err = mnt_want_write(filp->f_path.mnt);
+ err = mnt_want_write_file(filp);
if (err)
return err;
@@ -134,7 +136,7 @@ flags_err:
err = ext4_ext_migrate(inode);
flags_out:
mutex_unlock(&inode->i_mutex);
- mnt_drop_write(filp->f_path.mnt);
+ mnt_drop_write_file(filp);
return err;
}
case EXT4_IOC_GETVERSION:
@@ -150,7 +152,7 @@ flags_out:
if (!inode_owner_or_capable(inode))
return -EPERM;
- err = mnt_want_write(filp->f_path.mnt);
+ err = mnt_want_write_file(filp);
if (err)
return err;
if (get_user(generation, (int __user *) arg)) {
@@ -158,10 +160,11 @@ flags_out:
goto setversion_out;
}
+ mutex_lock(&inode->i_mutex);
handle = ext4_journal_start(inode, 1);
if (IS_ERR(handle)) {
err = PTR_ERR(handle);
- goto setversion_out;
+ goto unlock_out;
}
err = ext4_reserve_inode_write(handle, inode, &iloc);
if (err == 0) {
@@ -170,8 +173,11 @@ flags_out:
err = ext4_mark_iloc_dirty(handle, inode, &iloc);
}
ext4_journal_stop(handle);
+
+unlock_out:
+ mutex_unlock(&inode->i_mutex);
setversion_out:
- mnt_drop_write(filp->f_path.mnt);
+ mnt_drop_write_file(filp);
return err;
}
case EXT4_IOC_GROUP_EXTEND: {
@@ -182,19 +188,22 @@ setversion_out:
if (err)
return err;
- if (get_user(n_blocks_count, (__u32 __user *)arg))
- return -EFAULT;
+ if (get_user(n_blocks_count, (__u32 __user *)arg)) {
+ err = -EFAULT;
+ goto group_extend_out;
+ }
if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
EXT4_FEATURE_RO_COMPAT_BIGALLOC)) {
ext4_msg(sb, KERN_ERR,
"Online resizing not supported with bigalloc");
- return -EOPNOTSUPP;
+ err = -EOPNOTSUPP;
+ goto group_extend_out;
}
- err = mnt_want_write(filp->f_path.mnt);
+ err = mnt_want_write_file(filp);
if (err)
- return err;
+ goto group_extend_out;
err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count);
if (EXT4_SB(sb)->s_journal) {
@@ -204,9 +213,9 @@ setversion_out:
}
if (err == 0)
err = err2;
- mnt_drop_write(filp->f_path.mnt);
+ mnt_drop_write_file(filp);
+group_extend_out:
ext4_resize_end(sb);
-
return err;
}
@@ -240,15 +249,14 @@ setversion_out:
return -EOPNOTSUPP;
}
- err = mnt_want_write(filp->f_path.mnt);
+ err = mnt_want_write_file(filp);
if (err)
goto mext_out;
err = ext4_move_extents(filp, donor_filp, me.orig_start,
me.donor_start, me.len, &me.moved_len);
+ mnt_drop_write_file(filp);
mnt_drop_write(filp->f_path.mnt);
- if (me.moved_len > 0)
- file_remove_suid(donor_filp);
if (copy_to_user((struct move_extent __user *)arg,
&me, sizeof(me)))
@@ -267,19 +275,22 @@ mext_out:
return err;
if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg,
- sizeof(input)))
- return -EFAULT;
+ sizeof(input))) {
+ err = -EFAULT;
+ goto group_add_out;
+ }
if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
EXT4_FEATURE_RO_COMPAT_BIGALLOC)) {
ext4_msg(sb, KERN_ERR,
"Online resizing not supported with bigalloc");
- return -EOPNOTSUPP;
+ err = -EOPNOTSUPP;
+ goto group_add_out;
}
- err = mnt_want_write(filp->f_path.mnt);
+ err = mnt_want_write_file(filp);
if (err)
- return err;
+ goto group_add_out;
err = ext4_group_add(sb, &input);
if (EXT4_SB(sb)->s_journal) {
@@ -289,9 +300,9 @@ mext_out:
}
if (err == 0)
err = err2;
- mnt_drop_write(filp->f_path.mnt);
+ mnt_drop_write_file(filp);
+group_add_out:
ext4_resize_end(sb);
-
return err;
}
@@ -301,7 +312,7 @@ mext_out:
if (!inode_owner_or_capable(inode))
return -EACCES;
- err = mnt_want_write(filp->f_path.mnt);
+ err = mnt_want_write_file(filp);
if (err)
return err;
/*
@@ -313,7 +324,7 @@ mext_out:
mutex_lock(&(inode->i_mutex));
err = ext4_ext_migrate(inode);
mutex_unlock(&(inode->i_mutex));
- mnt_drop_write(filp->f_path.mnt);
+ mnt_drop_write_file(filp);
return err;
}
@@ -323,11 +334,65 @@ mext_out:
if (!inode_owner_or_capable(inode))
return -EACCES;
- err = mnt_want_write(filp->f_path.mnt);
+ err = mnt_want_write_file(filp);
if (err)
return err;
err = ext4_alloc_da_blocks(inode);
+ mnt_drop_write_file(filp);
+ return err;
+ }
+
+ case EXT4_IOC_RESIZE_FS: {
+ ext4_fsblk_t n_blocks_count;
+ struct super_block *sb = inode->i_sb;
+ int err = 0, err2 = 0;
+
+ if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
+ EXT4_FEATURE_RO_COMPAT_BIGALLOC)) {
+ ext4_msg(sb, KERN_ERR,
+ "Online resizing not (yet) supported with bigalloc");
+ return -EOPNOTSUPP;
+ }
+
+ if (EXT4_HAS_INCOMPAT_FEATURE(sb,
+ EXT4_FEATURE_INCOMPAT_META_BG)) {
+ ext4_msg(sb, KERN_ERR,
+ "Online resizing not (yet) supported with meta_bg");
+ return -EOPNOTSUPP;
+ }
+
+ if (copy_from_user(&n_blocks_count, (__u64 __user *)arg,
+ sizeof(__u64))) {
+ return -EFAULT;
+ }
+
+ if (n_blocks_count > MAX_32_NUM &&
+ !EXT4_HAS_INCOMPAT_FEATURE(sb,
+ EXT4_FEATURE_INCOMPAT_64BIT)) {
+ ext4_msg(sb, KERN_ERR,
+ "File system only supports 32-bit block numbers");
+ return -EOPNOTSUPP;
+ }
+
+ err = ext4_resize_begin(sb);
+ if (err)
+ return err;
+
+ err = mnt_want_write(filp->f_path.mnt);
+ if (err)
+ goto resizefs_out;
+
+ err = ext4_resize_fs(sb, n_blocks_count);
+ if (EXT4_SB(sb)->s_journal) {
+ jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
+ err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
+ jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
+ }
+ if (err == 0)
+ err = err2;
mnt_drop_write(filp->f_path.mnt);
+resizefs_out:
+ ext4_resize_end(sb);
return err;
}
@@ -429,6 +494,7 @@ long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
}
case EXT4_IOC_MOVE_EXT:
case FITRIM:
+ case EXT4_IOC_RESIZE_FS:
break;
default:
return -ENOIOCTLCMD;
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-20 02:14:07 +0000