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| author | Theodore Ts'o <tytso@mit.edu> | 2011-09-09 18:36:51 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2011-09-09 18:36:51 -0400 |
| commit | bab08ab9646288f1b0b72a7aaeecdff94bd62c18 (patch) | |
| tree | e301377f1ce9093a44b2cfb331439e15d79789ed /fs/ext4/ioctl.c | |
| parent | 281b59959707dfae03ce038cdf231bf4904e170c (diff) | |
| download | linux-bab08ab9646288f1b0b72a7aaeecdff94bd62c18.tar.bz2 | |
ext4: enforce bigalloc restrictions (e.g., no online resizing, etc.)
At least initially if the bigalloc feature is enabled, we will not
support non-extent mapped inodes, online resizing, online defrag, or
the FITRIM ioctl. This simplifies the initial implementation.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/ioctl.c')
| -rw-r--r-- | fs/ext4/ioctl.c | 33 |
1 files changed, 29 insertions, 4 deletions
diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c index f18bfe37aff8..2046d699b4a7 100644 --- a/fs/ext4/ioctl.c +++ b/fs/ext4/ioctl.c @@ -21,6 +21,7 @@ long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) { struct inode *inode = filp->f_dentry->d_inode; + struct super_block *sb = inode->i_sb; struct ext4_inode_info *ei = EXT4_I(inode); unsigned int flags; @@ -183,7 +184,6 @@ setversion_out: * Returns 1 if it slept, else zero. */ { - struct super_block *sb = inode->i_sb; DECLARE_WAITQUEUE(wait, current); int ret = 0; @@ -199,7 +199,6 @@ setversion_out: #endif case EXT4_IOC_GROUP_EXTEND: { ext4_fsblk_t n_blocks_count; - struct super_block *sb = inode->i_sb; int err, err2=0; err = ext4_resize_begin(sb); @@ -209,6 +208,13 @@ setversion_out: if (get_user(n_blocks_count, (__u32 __user *)arg)) return -EFAULT; + 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 = mnt_want_write(filp->f_path.mnt); if (err) return err; @@ -250,6 +256,13 @@ setversion_out: goto mext_out; } + if (EXT4_HAS_RO_COMPAT_FEATURE(sb, + EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { + ext4_msg(sb, KERN_ERR, + "Online defrag not supported with bigalloc"); + return -EOPNOTSUPP; + } + err = mnt_want_write(filp->f_path.mnt); if (err) goto mext_out; @@ -270,7 +283,6 @@ mext_out: case EXT4_IOC_GROUP_ADD: { struct ext4_new_group_data input; - struct super_block *sb = inode->i_sb; int err, err2=0; err = ext4_resize_begin(sb); @@ -281,6 +293,13 @@ mext_out: sizeof(input))) return -EFAULT; + 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 = mnt_want_write(filp->f_path.mnt); if (err) return err; @@ -337,7 +356,6 @@ mext_out: case FITRIM: { - struct super_block *sb = inode->i_sb; struct request_queue *q = bdev_get_queue(sb->s_bdev); struct fstrim_range range; int ret = 0; @@ -348,6 +366,13 @@ mext_out: if (!blk_queue_discard(q)) return -EOPNOTSUPP; + if (EXT4_HAS_RO_COMPAT_FEATURE(sb, + EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { + ext4_msg(sb, KERN_ERR, + "FITRIM not supported with bigalloc"); + return -EOPNOTSUPP; + } + if (copy_from_user(&range, (struct fstrim_range *)arg, sizeof(range))) return -EFAULT; |