NTFS: Add fs/ntfs/attrib.[hc]::ntfs_attr_extend_allocation(), a function to
extend the allocation of an attributes. Optionally, the data size,
but not the initialized size can be extended, too.
Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
This commit is contained in:
Anton Altaparmakov
parent
2a6fc4e1b0
commit
2d86829b84
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@ -47,6 +47,9 @@ ToDo/Notes:
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which is zero for a resident attribute but should no longer be zero
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which is zero for a resident attribute but should no longer be zero
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once the attribute is non-resident as it then has real clusters
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once the attribute is non-resident as it then has real clusters
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allocated.
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allocated.
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- Add fs/ntfs/attrib.[hc]::ntfs_attr_extend_allocation(), a function to
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extend the allocation of an attributes. Optionally, the data size,
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but not the initialized size can be extended, too.
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2.1.24 - Lots of bug fixes and support more clean journal states.
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2.1.24 - Lots of bug fixes and support more clean journal states.
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634
fs/ntfs/attrib.c
634
fs/ntfs/attrib.c
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@ -1834,6 +1834,640 @@ page_err_out:
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return err;
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return err;
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}
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}
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/**
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* ntfs_attr_extend_allocation - extend the allocated space of an attribute
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* @ni: ntfs inode of the attribute whose allocation to extend
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* @new_alloc_size: new size in bytes to which to extend the allocation to
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* @new_data_size: new size in bytes to which to extend the data to
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* @data_start: beginning of region which is required to be non-sparse
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*
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* Extend the allocated space of an attribute described by the ntfs inode @ni
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* to @new_alloc_size bytes. If @data_start is -1, the whole extension may be
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* implemented as a hole in the file (as long as both the volume and the ntfs
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* inode @ni have sparse support enabled). If @data_start is >= 0, then the
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* region between the old allocated size and @data_start - 1 may be made sparse
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* but the regions between @data_start and @new_alloc_size must be backed by
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* actual clusters.
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*
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* If @new_data_size is -1, it is ignored. If it is >= 0, then the data size
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* of the attribute is extended to @new_data_size. Note that the i_size of the
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* vfs inode is not updated. Only the data size in the base attribute record
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* is updated. The caller has to update i_size separately if this is required.
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* WARNING: It is a BUG() for @new_data_size to be smaller than the old data
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* size as well as for @new_data_size to be greater than @new_alloc_size.
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*
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* For resident attributes this involves resizing the attribute record and if
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* necessary moving it and/or other attributes into extent mft records and/or
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* converting the attribute to a non-resident attribute which in turn involves
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* extending the allocation of a non-resident attribute as described below.
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*
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* For non-resident attributes this involves allocating clusters in the data
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* zone on the volume (except for regions that are being made sparse) and
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* extending the run list to describe the allocated clusters as well as
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* updating the mapping pairs array of the attribute. This in turn involves
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* resizing the attribute record and if necessary moving it and/or other
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* attributes into extent mft records and/or splitting the attribute record
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* into multiple extent attribute records.
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*
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* Also, the attribute list attribute is updated if present and in some of the
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* above cases (the ones where extent mft records/attributes come into play),
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* an attribute list attribute is created if not already present.
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*
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* Return the new allocated size on success and -errno on error. In the case
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* that an error is encountered but a partial extension at least up to
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* @data_start (if present) is possible, the allocation is partially extended
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* and this is returned. This means the caller must check the returned size to
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* determine if the extension was partial. If @data_start is -1 then partial
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* allocations are not performed.
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*
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* WARNING: Do not call ntfs_attr_extend_allocation() for $MFT/$DATA.
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*
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* Locking: This function takes the runlist lock of @ni for writing as well as
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* locking the mft record of the base ntfs inode. These locks are maintained
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* throughout execution of the function. These locks are required so that the
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* attribute can be resized safely and so that it can for example be converted
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* from resident to non-resident safely.
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*
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* TODO: At present attribute list attribute handling is not implemented.
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*
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* TODO: At present it is not safe to call this function for anything other
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* than the $DATA attribute(s) of an uncompressed and unencrypted file.
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*/
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s64 ntfs_attr_extend_allocation(ntfs_inode *ni, s64 new_alloc_size,
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const s64 new_data_size, const s64 data_start)
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{
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VCN vcn;
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s64 ll, allocated_size, start = data_start;
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struct inode *vi = VFS_I(ni);
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ntfs_volume *vol = ni->vol;
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ntfs_inode *base_ni;
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MFT_RECORD *m;
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ATTR_RECORD *a;
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ntfs_attr_search_ctx *ctx;
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runlist_element *rl, *rl2;
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unsigned long flags;
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int err, mp_size;
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u32 attr_len = 0; /* Silence stupid gcc warning. */
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BOOL mp_rebuilt;
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#ifdef NTFS_DEBUG
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read_lock_irqsave(&ni->size_lock, flags);
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allocated_size = ni->allocated_size;
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read_unlock_irqrestore(&ni->size_lock, flags);
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ntfs_debug("Entering for i_ino 0x%lx, attribute type 0x%x, "
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"old_allocated_size 0x%llx, "
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"new_allocated_size 0x%llx, new_data_size 0x%llx, "
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"data_start 0x%llx.", vi->i_ino,
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(unsigned)le32_to_cpu(ni->type),
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(unsigned long long)allocated_size,
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(unsigned long long)new_alloc_size,
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(unsigned long long)new_data_size,
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(unsigned long long)start);
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#endif
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retry_extend:
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/*
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* For non-resident attributes, @start and @new_size need to be aligned
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* to cluster boundaries for allocation purposes.
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*/
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if (NInoNonResident(ni)) {
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if (start > 0)
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start &= ~(s64)vol->cluster_size_mask;
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new_alloc_size = (new_alloc_size + vol->cluster_size - 1) &
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~(s64)vol->cluster_size_mask;
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}
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BUG_ON(new_data_size >= 0 && new_data_size > new_alloc_size);
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/* Check if new size is allowed in $AttrDef. */
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err = ntfs_attr_size_bounds_check(vol, ni->type, new_alloc_size);
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if (unlikely(err)) {
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/* Only emit errors when the write will fail completely. */
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read_lock_irqsave(&ni->size_lock, flags);
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allocated_size = ni->allocated_size;
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read_unlock_irqrestore(&ni->size_lock, flags);
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if (start < 0 || start >= allocated_size) {
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if (err == -ERANGE) {
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ntfs_error(vol->sb, "Cannot extend allocation "
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"of inode 0x%lx, attribute "
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"type 0x%x, because the new "
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"allocation would exceed the "
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"maximum allowed size for "
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"this attribute type.",
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vi->i_ino, (unsigned)
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le32_to_cpu(ni->type));
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} else {
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ntfs_error(vol->sb, "Cannot extend allocation "
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"of inode 0x%lx, attribute "
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"type 0x%x, because this "
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"attribute type is not "
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"defined on the NTFS volume. "
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"Possible corruption! You "
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"should run chkdsk!",
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vi->i_ino, (unsigned)
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le32_to_cpu(ni->type));
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}
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}
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/* Translate error code to be POSIX conformant for write(2). */
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if (err == -ERANGE)
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err = -EFBIG;
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else
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err = -EIO;
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return err;
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}
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if (!NInoAttr(ni))
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base_ni = ni;
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else
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base_ni = ni->ext.base_ntfs_ino;
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/*
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* We will be modifying both the runlist (if non-resident) and the mft
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* record so lock them both down.
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*/
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down_write(&ni->runlist.lock);
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m = map_mft_record(base_ni);
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if (IS_ERR(m)) {
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err = PTR_ERR(m);
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m = NULL;
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ctx = NULL;
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goto err_out;
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}
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ctx = ntfs_attr_get_search_ctx(base_ni, m);
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if (unlikely(!ctx)) {
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err = -ENOMEM;
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goto err_out;
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}
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read_lock_irqsave(&ni->size_lock, flags);
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allocated_size = ni->allocated_size;
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read_unlock_irqrestore(&ni->size_lock, flags);
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/*
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* If non-resident, seek to the last extent. If resident, there is
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* only one extent, so seek to that.
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*/
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vcn = NInoNonResident(ni) ? allocated_size >> vol->cluster_size_bits :
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0;
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/*
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* Abort if someone did the work whilst we waited for the locks. If we
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* just converted the attribute from resident to non-resident it is
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* likely that exactly this has happened already. We cannot quite
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* abort if we need to update the data size.
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*/
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if (unlikely(new_alloc_size <= allocated_size)) {
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ntfs_debug("Allocated size already exceeds requested size.");
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new_alloc_size = allocated_size;
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if (new_data_size < 0)
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goto done;
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/*
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* We want the first attribute extent so that we can update the
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* data size.
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*/
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vcn = 0;
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}
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err = ntfs_attr_lookup(ni->type, ni->name, ni->name_len,
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CASE_SENSITIVE, vcn, NULL, 0, ctx);
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if (unlikely(err)) {
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if (err == -ENOENT)
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err = -EIO;
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goto err_out;
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}
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m = ctx->mrec;
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a = ctx->attr;
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/* Use goto to reduce indentation. */
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if (a->non_resident)
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goto do_non_resident_extend;
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BUG_ON(NInoNonResident(ni));
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/* The total length of the attribute value. */
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attr_len = le32_to_cpu(a->data.resident.value_length);
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/*
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* Extend the attribute record to be able to store the new attribute
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* size. ntfs_attr_record_resize() will not do anything if the size is
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* not changing.
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*/
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if (new_alloc_size < vol->mft_record_size &&
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!ntfs_attr_record_resize(m, a,
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le16_to_cpu(a->data.resident.value_offset) +
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new_alloc_size)) {
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/* The resize succeeded! */
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write_lock_irqsave(&ni->size_lock, flags);
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ni->allocated_size = le32_to_cpu(a->length) -
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le16_to_cpu(a->data.resident.value_offset);
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write_unlock_irqrestore(&ni->size_lock, flags);
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if (new_data_size >= 0) {
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BUG_ON(new_data_size < attr_len);
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a->data.resident.value_length =
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cpu_to_le32((u32)new_data_size);
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}
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goto flush_done;
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}
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/*
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* We have to drop all the locks so we can call
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* ntfs_attr_make_non_resident(). This could be optimised by try-
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* locking the first page cache page and only if that fails dropping
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* the locks, locking the page, and redoing all the locking and
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* lookups. While this would be a huge optimisation, it is not worth
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* it as this is definitely a slow code path.
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*/
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ntfs_attr_put_search_ctx(ctx);
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unmap_mft_record(base_ni);
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up_write(&ni->runlist.lock);
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/*
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* Not enough space in the mft record, try to make the attribute
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* non-resident and if successful restart the extension process.
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*/
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err = ntfs_attr_make_non_resident(ni, attr_len);
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if (likely(!err))
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goto retry_extend;
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/*
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* Could not make non-resident. If this is due to this not being
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* permitted for this attribute type or there not being enough space,
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* try to make other attributes non-resident. Otherwise fail.
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*/
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if (unlikely(err != -EPERM && err != -ENOSPC)) {
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/* Only emit errors when the write will fail completely. */
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read_lock_irqsave(&ni->size_lock, flags);
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allocated_size = ni->allocated_size;
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read_unlock_irqrestore(&ni->size_lock, flags);
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if (start < 0 || start >= allocated_size)
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ntfs_error(vol->sb, "Cannot extend allocation of "
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"inode 0x%lx, attribute type 0x%x, "
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"because the conversion from resident "
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"to non-resident attribute failed "
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"with error code %i.", vi->i_ino,
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(unsigned)le32_to_cpu(ni->type), err);
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if (err != -ENOMEM)
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err = -EIO;
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goto conv_err_out;
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}
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/* TODO: Not implemented from here, abort. */
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read_lock_irqsave(&ni->size_lock, flags);
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allocated_size = ni->allocated_size;
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read_unlock_irqrestore(&ni->size_lock, flags);
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if (start < 0 || start >= allocated_size) {
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if (err == -ENOSPC)
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ntfs_error(vol->sb, "Not enough space in the mft "
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"record/on disk for the non-resident "
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"attribute value. This case is not "
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"implemented yet.");
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else /* if (err == -EPERM) */
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ntfs_error(vol->sb, "This attribute type may not be "
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"non-resident. This case is not "
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"implemented yet.");
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}
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err = -EOPNOTSUPP;
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goto conv_err_out;
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#if 0
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// TODO: Attempt to make other attributes non-resident.
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if (!err)
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goto do_resident_extend;
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/*
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* Both the attribute list attribute and the standard information
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* attribute must remain in the base inode. Thus, if this is one of
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* these attributes, we have to try to move other attributes out into
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* extent mft records instead.
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*/
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if (ni->type == AT_ATTRIBUTE_LIST ||
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ni->type == AT_STANDARD_INFORMATION) {
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// TODO: Attempt to move other attributes into extent mft
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// records.
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err = -EOPNOTSUPP;
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if (!err)
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goto do_resident_extend;
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goto err_out;
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}
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// TODO: Attempt to move this attribute to an extent mft record, but
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// only if it is not already the only attribute in an mft record in
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// which case there would be nothing to gain.
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err = -EOPNOTSUPP;
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if (!err)
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goto do_resident_extend;
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/* There is nothing we can do to make enough space. )-: */
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goto err_out;
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#endif
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do_non_resident_extend:
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BUG_ON(!NInoNonResident(ni));
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if (new_alloc_size == allocated_size) {
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BUG_ON(vcn);
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goto alloc_done;
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}
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/*
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* If the data starts after the end of the old allocation, this is a
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* $DATA attribute and sparse attributes are enabled on the volume and
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* for this inode, then create a sparse region between the old
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* allocated size and the start of the data. Otherwise simply proceed
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* with filling the whole space between the old allocated size and the
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* new allocated size with clusters.
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*/
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if ((start >= 0 && start <= allocated_size) || ni->type != AT_DATA ||
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!NVolSparseEnabled(vol) || NInoSparseDisabled(ni))
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goto skip_sparse;
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// TODO: This is not implemented yet. We just fill in with real
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// clusters for now...
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ntfs_debug("Inserting holes is not-implemented yet. Falling back to "
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"allocating real clusters instead.");
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skip_sparse:
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||||||
|
rl = ni->runlist.rl;
|
||||||
|
if (likely(rl)) {
|
||||||
|
/* Seek to the end of the runlist. */
|
||||||
|
while (rl->length)
|
||||||
|
rl++;
|
||||||
|
}
|
||||||
|
/* If this attribute extent is not mapped, map it now. */
|
||||||
|
if (unlikely(!rl || rl->lcn == LCN_RL_NOT_MAPPED ||
|
||||||
|
(rl->lcn == LCN_ENOENT && rl > ni->runlist.rl &&
|
||||||
|
(rl-1)->lcn == LCN_RL_NOT_MAPPED))) {
|
||||||
|
if (!rl && !allocated_size)
|
||||||
|
goto first_alloc;
|
||||||
|
rl = ntfs_mapping_pairs_decompress(vol, a, ni->runlist.rl);
|
||||||
|
if (IS_ERR(rl)) {
|
||||||
|
err = PTR_ERR(rl);
|
||||||
|
if (start < 0 || start >= allocated_size)
|
||||||
|
ntfs_error(vol->sb, "Cannot extend allocation "
|
||||||
|
"of inode 0x%lx, attribute "
|
||||||
|
"type 0x%x, because the "
|
||||||
|
"mapping of a runlist "
|
||||||
|
"fragment failed with error "
|
||||||
|
"code %i.", vi->i_ino,
|
||||||
|
(unsigned)le32_to_cpu(ni->type),
|
||||||
|
err);
|
||||||
|
if (err != -ENOMEM)
|
||||||
|
err = -EIO;
|
||||||
|
goto err_out;
|
||||||
|
}
|
||||||
|
ni->runlist.rl = rl;
|
||||||
|
/* Seek to the end of the runlist. */
|
||||||
|
while (rl->length)
|
||||||
|
rl++;
|
||||||
|
}
|
||||||
|
/*
|
||||||
|
* We now know the runlist of the last extent is mapped and @rl is at
|
||||||
|
* the end of the runlist. We want to begin allocating clusters
|
||||||
|
* starting at the last allocated cluster to reduce fragmentation. If
|
||||||
|
* there are no valid LCNs in the attribute we let the cluster
|
||||||
|
* allocator choose the starting cluster.
|
||||||
|
*/
|
||||||
|
/* If the last LCN is a hole or simillar seek back to last real LCN. */
|
||||||
|
while (rl->lcn < 0 && rl > ni->runlist.rl)
|
||||||
|
rl--;
|
||||||
|
first_alloc:
|
||||||
|
// FIXME: Need to implement partial allocations so at least part of the
|
||||||
|
// write can be performed when start >= 0. (Needed for POSIX write(2)
|
||||||
|
// conformance.)
|
||||||
|
rl2 = ntfs_cluster_alloc(vol, allocated_size >> vol->cluster_size_bits,
|
||||||
|
(new_alloc_size - allocated_size) >>
|
||||||
|
vol->cluster_size_bits, (rl && (rl->lcn >= 0)) ?
|
||||||
|
rl->lcn + rl->length : -1, DATA_ZONE, TRUE);
|
||||||
|
if (IS_ERR(rl2)) {
|
||||||
|
err = PTR_ERR(rl2);
|
||||||
|
if (start < 0 || start >= allocated_size)
|
||||||
|
ntfs_error(vol->sb, "Cannot extend allocation of "
|
||||||
|
"inode 0x%lx, attribute type 0x%x, "
|
||||||
|
"because the allocation of clusters "
|
||||||
|
"failed with error code %i.", vi->i_ino,
|
||||||
|
(unsigned)le32_to_cpu(ni->type), err);
|
||||||
|
if (err != -ENOMEM && err != -ENOSPC)
|
||||||
|
err = -EIO;
|
||||||
|
goto err_out;
|
||||||
|
}
|
||||||
|
rl = ntfs_runlists_merge(ni->runlist.rl, rl2);
|
||||||
|
if (IS_ERR(rl)) {
|
||||||
|
err = PTR_ERR(rl);
|
||||||
|
if (start < 0 || start >= allocated_size)
|
||||||
|
ntfs_error(vol->sb, "Cannot extend allocation of "
|
||||||
|
"inode 0x%lx, attribute type 0x%x, "
|
||||||
|
"because the runlist merge failed "
|
||||||
|
"with error code %i.", vi->i_ino,
|
||||||
|
(unsigned)le32_to_cpu(ni->type), err);
|
||||||
|
if (err != -ENOMEM)
|
||||||
|
err = -EIO;
|
||||||
|
if (ntfs_cluster_free_from_rl(vol, rl2)) {
|
||||||
|
ntfs_error(vol->sb, "Failed to release allocated "
|
||||||
|
"cluster(s) in error code path. Run "
|
||||||
|
"chkdsk to recover the lost "
|
||||||
|
"cluster(s).");
|
||||||
|
NVolSetErrors(vol);
|
||||||
|
}
|
||||||
|
ntfs_free(rl2);
|
||||||
|
goto err_out;
|
||||||
|
}
|
||||||
|
ni->runlist.rl = rl;
|
||||||
|
ntfs_debug("Allocated 0x%llx clusters.", (long long)(new_alloc_size -
|
||||||
|
allocated_size) >> vol->cluster_size_bits);
|
||||||
|
/* Find the runlist element with which the attribute extent starts. */
|
||||||
|
ll = sle64_to_cpu(a->data.non_resident.lowest_vcn);
|
||||||
|
rl2 = ntfs_rl_find_vcn_nolock(rl, ll);
|
||||||
|
BUG_ON(!rl2);
|
||||||
|
BUG_ON(!rl2->length);
|
||||||
|
BUG_ON(rl2->lcn < LCN_HOLE);
|
||||||
|
mp_rebuilt = FALSE;
|
||||||
|
/* Get the size for the new mapping pairs array for this extent. */
|
||||||
|
mp_size = ntfs_get_size_for_mapping_pairs(vol, rl2, ll, -1);
|
||||||
|
if (unlikely(mp_size <= 0)) {
|
||||||
|
err = mp_size;
|
||||||
|
if (start < 0 || start >= allocated_size)
|
||||||
|
ntfs_error(vol->sb, "Cannot extend allocation of "
|
||||||
|
"inode 0x%lx, attribute type 0x%x, "
|
||||||
|
"because determining the size for the "
|
||||||
|
"mapping pairs failed with error code "
|
||||||
|
"%i.", vi->i_ino,
|
||||||
|
(unsigned)le32_to_cpu(ni->type), err);
|
||||||
|
err = -EIO;
|
||||||
|
goto undo_alloc;
|
||||||
|
}
|
||||||
|
/* Extend the attribute record to fit the bigger mapping pairs array. */
|
||||||
|
attr_len = le32_to_cpu(a->length);
|
||||||
|
err = ntfs_attr_record_resize(m, a, mp_size +
|
||||||
|
le16_to_cpu(a->data.non_resident.mapping_pairs_offset));
|
||||||
|
if (unlikely(err)) {
|
||||||
|
BUG_ON(err != -ENOSPC);
|
||||||
|
// TODO: Deal with this by moving this extent to a new mft
|
||||||
|
// record or by starting a new extent in a new mft record,
|
||||||
|
// possibly by extending this extent partially and filling it
|
||||||
|
// and creating a new extent for the remainder, or by making
|
||||||
|
// other attributes non-resident and/or by moving other
|
||||||
|
// attributes out of this mft record.
|
||||||
|
if (start < 0 || start >= allocated_size)
|
||||||
|
ntfs_error(vol->sb, "Not enough space in the mft "
|
||||||
|
"record for the extended attribute "
|
||||||
|
"record. This case is not "
|
||||||
|
"implemented yet.");
|
||||||
|
err = -EOPNOTSUPP;
|
||||||
|
goto undo_alloc;
|
||||||
|
}
|
||||||
|
mp_rebuilt = TRUE;
|
||||||
|
/* Generate the mapping pairs array directly into the attr record. */
|
||||||
|
err = ntfs_mapping_pairs_build(vol, (u8*)a +
|
||||||
|
le16_to_cpu(a->data.non_resident.mapping_pairs_offset),
|
||||||
|
mp_size, rl2, ll, -1, NULL);
|
||||||
|
if (unlikely(err)) {
|
||||||
|
if (start < 0 || start >= allocated_size)
|
||||||
|
ntfs_error(vol->sb, "Cannot extend allocation of "
|
||||||
|
"inode 0x%lx, attribute type 0x%x, "
|
||||||
|
"because building the mapping pairs "
|
||||||
|
"failed with error code %i.", vi->i_ino,
|
||||||
|
(unsigned)le32_to_cpu(ni->type), err);
|
||||||
|
err = -EIO;
|
||||||
|
goto undo_alloc;
|
||||||
|
}
|
||||||
|
/* Update the highest_vcn. */
|
||||||
|
a->data.non_resident.highest_vcn = cpu_to_sle64((new_alloc_size >>
|
||||||
|
vol->cluster_size_bits) - 1);
|
||||||
|
/*
|
||||||
|
* We now have extended the allocated size of the attribute. Reflect
|
||||||
|
* this in the ntfs_inode structure and the attribute record.
|
||||||
|
*/
|
||||||
|
if (a->data.non_resident.lowest_vcn) {
|
||||||
|
/*
|
||||||
|
* We are not in the first attribute extent, switch to it, but
|
||||||
|
* first ensure the changes will make it to disk later.
|
||||||
|
*/
|
||||||
|
flush_dcache_mft_record_page(ctx->ntfs_ino);
|
||||||
|
mark_mft_record_dirty(ctx->ntfs_ino);
|
||||||
|
ntfs_attr_reinit_search_ctx(ctx);
|
||||||
|
err = ntfs_attr_lookup(ni->type, ni->name, ni->name_len,
|
||||||
|
CASE_SENSITIVE, 0, NULL, 0, ctx);
|
||||||
|
if (unlikely(err))
|
||||||
|
goto restore_undo_alloc;
|
||||||
|
/* @m is not used any more so no need to set it. */
|
||||||
|
a = ctx->attr;
|
||||||
|
}
|
||||||
|
write_lock_irqsave(&ni->size_lock, flags);
|
||||||
|
ni->allocated_size = new_alloc_size;
|
||||||
|
a->data.non_resident.allocated_size = cpu_to_sle64(new_alloc_size);
|
||||||
|
/*
|
||||||
|
* FIXME: This would fail if @ni is a directory, $MFT, or an index,
|
||||||
|
* since those can have sparse/compressed set. For example can be
|
||||||
|
* set compressed even though it is not compressed itself and in that
|
||||||
|
* case the bit means that files are to be created compressed in the
|
||||||
|
* directory... At present this is ok as this code is only called for
|
||||||
|
* regular files, and only for their $DATA attribute(s).
|
||||||
|
* FIXME: The calculation is wrong if we created a hole above. For now
|
||||||
|
* it does not matter as we never create holes.
|
||||||
|
*/
|
||||||
|
if (NInoSparse(ni) || NInoCompressed(ni)) {
|
||||||
|
ni->itype.compressed.size += new_alloc_size - allocated_size;
|
||||||
|
a->data.non_resident.compressed_size =
|
||||||
|
cpu_to_sle64(ni->itype.compressed.size);
|
||||||
|
vi->i_blocks = ni->itype.compressed.size >> 9;
|
||||||
|
} else
|
||||||
|
vi->i_blocks = new_alloc_size >> 9;
|
||||||
|
write_unlock_irqrestore(&ni->size_lock, flags);
|
||||||
|
alloc_done:
|
||||||
|
if (new_data_size >= 0) {
|
||||||
|
BUG_ON(new_data_size <
|
||||||
|
sle64_to_cpu(a->data.non_resident.data_size));
|
||||||
|
a->data.non_resident.data_size = cpu_to_sle64(new_data_size);
|
||||||
|
}
|
||||||
|
flush_done:
|
||||||
|
/* Ensure the changes make it to disk. */
|
||||||
|
flush_dcache_mft_record_page(ctx->ntfs_ino);
|
||||||
|
mark_mft_record_dirty(ctx->ntfs_ino);
|
||||||
|
done:
|
||||||
|
ntfs_attr_put_search_ctx(ctx);
|
||||||
|
unmap_mft_record(base_ni);
|
||||||
|
up_write(&ni->runlist.lock);
|
||||||
|
ntfs_debug("Done, new_allocated_size 0x%llx.",
|
||||||
|
(unsigned long long)new_alloc_size);
|
||||||
|
return new_alloc_size;
|
||||||
|
restore_undo_alloc:
|
||||||
|
if (start < 0 || start >= allocated_size)
|
||||||
|
ntfs_error(vol->sb, "Cannot complete extension of allocation "
|
||||||
|
"of inode 0x%lx, attribute type 0x%x, because "
|
||||||
|
"lookup of first attribute extent failed with "
|
||||||
|
"error code %i.", vi->i_ino,
|
||||||
|
(unsigned)le32_to_cpu(ni->type), err);
|
||||||
|
if (err == -ENOENT)
|
||||||
|
err = -EIO;
|
||||||
|
ntfs_attr_reinit_search_ctx(ctx);
|
||||||
|
if (ntfs_attr_lookup(ni->type, ni->name, ni->name_len, CASE_SENSITIVE,
|
||||||
|
allocated_size >> vol->cluster_size_bits, NULL, 0,
|
||||||
|
ctx)) {
|
||||||
|
ntfs_error(vol->sb, "Failed to find last attribute extent of "
|
||||||
|
"attribute in error code path. Run chkdsk to "
|
||||||
|
"recover.");
|
||||||
|
write_lock_irqsave(&ni->size_lock, flags);
|
||||||
|
ni->allocated_size = new_alloc_size;
|
||||||
|
/*
|
||||||
|
* FIXME: This would fail if @ni is a directory... See above.
|
||||||
|
* FIXME: The calculation is wrong if we created a hole above.
|
||||||
|
* For now it does not matter as we never create holes.
|
||||||
|
*/
|
||||||
|
if (NInoSparse(ni) || NInoCompressed(ni)) {
|
||||||
|
ni->itype.compressed.size += new_alloc_size -
|
||||||
|
allocated_size;
|
||||||
|
vi->i_blocks = ni->itype.compressed.size >> 9;
|
||||||
|
} else
|
||||||
|
vi->i_blocks = new_alloc_size >> 9;
|
||||||
|
write_unlock_irqrestore(&ni->size_lock, flags);
|
||||||
|
ntfs_attr_put_search_ctx(ctx);
|
||||||
|
unmap_mft_record(base_ni);
|
||||||
|
up_write(&ni->runlist.lock);
|
||||||
|
/*
|
||||||
|
* The only thing that is now wrong is the allocated size of the
|
||||||
|
* base attribute extent which chkdsk should be able to fix.
|
||||||
|
*/
|
||||||
|
NVolSetErrors(vol);
|
||||||
|
return err;
|
||||||
|
}
|
||||||
|
ctx->attr->data.non_resident.highest_vcn = cpu_to_sle64(
|
||||||
|
(allocated_size >> vol->cluster_size_bits) - 1);
|
||||||
|
undo_alloc:
|
||||||
|
ll = allocated_size >> vol->cluster_size_bits;
|
||||||
|
if (ntfs_cluster_free(ni, ll, -1, ctx) < 0) {
|
||||||
|
ntfs_error(vol->sb, "Failed to release allocated cluster(s) "
|
||||||
|
"in error code path. Run chkdsk to recover "
|
||||||
|
"the lost cluster(s).");
|
||||||
|
NVolSetErrors(vol);
|
||||||
|
}
|
||||||
|
m = ctx->mrec;
|
||||||
|
a = ctx->attr;
|
||||||
|
/*
|
||||||
|
* If the runlist truncation fails and/or the search context is no
|
||||||
|
* longer valid, we cannot resize the attribute record or build the
|
||||||
|
* mapping pairs array thus we mark the inode bad so that no access to
|
||||||
|
* the freed clusters can happen.
|
||||||
|
*/
|
||||||
|
if (ntfs_rl_truncate_nolock(vol, &ni->runlist, ll) || IS_ERR(m)) {
|
||||||
|
ntfs_error(vol->sb, "Failed to %s in error code path. Run "
|
||||||
|
"chkdsk to recover.", IS_ERR(m) ?
|
||||||
|
"restore attribute search context" :
|
||||||
|
"truncate attribute runlist");
|
||||||
|
make_bad_inode(vi);
|
||||||
|
make_bad_inode(VFS_I(base_ni));
|
||||||
|
NVolSetErrors(vol);
|
||||||
|
} else if (mp_rebuilt) {
|
||||||
|
if (ntfs_attr_record_resize(m, a, attr_len)) {
|
||||||
|
ntfs_error(vol->sb, "Failed to restore attribute "
|
||||||
|
"record in error code path. Run "
|
||||||
|
"chkdsk to recover.");
|
||||||
|
make_bad_inode(vi);
|
||||||
|
make_bad_inode(VFS_I(base_ni));
|
||||||
|
NVolSetErrors(vol);
|
||||||
|
} else /* if (success) */ {
|
||||||
|
if (ntfs_mapping_pairs_build(vol, (u8*)a + le16_to_cpu(
|
||||||
|
a->data.non_resident.
|
||||||
|
mapping_pairs_offset), attr_len -
|
||||||
|
le16_to_cpu(a->data.non_resident.
|
||||||
|
mapping_pairs_offset), rl2, ll, -1,
|
||||||
|
NULL)) {
|
||||||
|
ntfs_error(vol->sb, "Failed to restore "
|
||||||
|
"mapping pairs array in error "
|
||||||
|
"code path. Run chkdsk to "
|
||||||
|
"recover.");
|
||||||
|
make_bad_inode(vi);
|
||||||
|
make_bad_inode(VFS_I(base_ni));
|
||||||
|
NVolSetErrors(vol);
|
||||||
|
}
|
||||||
|
flush_dcache_mft_record_page(ctx->ntfs_ino);
|
||||||
|
mark_mft_record_dirty(ctx->ntfs_ino);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
err_out:
|
||||||
|
if (ctx)
|
||||||
|
ntfs_attr_put_search_ctx(ctx);
|
||||||
|
if (m)
|
||||||
|
unmap_mft_record(base_ni);
|
||||||
|
up_write(&ni->runlist.lock);
|
||||||
|
conv_err_out:
|
||||||
|
ntfs_debug("Failed. Returning error code %i.", err);
|
||||||
|
return err;
|
||||||
|
}
|
||||||
|
|
||||||
/**
|
/**
|
||||||
* ntfs_attr_set - fill (a part of) an attribute with a byte
|
* ntfs_attr_set - fill (a part of) an attribute with a byte
|
||||||
* @ni: ntfs inode describing the attribute to fill
|
* @ni: ntfs inode describing the attribute to fill
|
||||||
|
|
|
||||||
|
|
@ -105,6 +105,9 @@ extern int ntfs_resident_attr_value_resize(MFT_RECORD *m, ATTR_RECORD *a,
|
||||||
|
|
||||||
extern int ntfs_attr_make_non_resident(ntfs_inode *ni, const u32 data_size);
|
extern int ntfs_attr_make_non_resident(ntfs_inode *ni, const u32 data_size);
|
||||||
|
|
||||||
|
extern s64 ntfs_attr_extend_allocation(ntfs_inode *ni, s64 new_alloc_size,
|
||||||
|
const s64 new_data_size, const s64 data_start);
|
||||||
|
|
||||||
extern int ntfs_attr_set(ntfs_inode *ni, const s64 ofs, const s64 cnt,
|
extern int ntfs_attr_set(ntfs_inode *ni, const s64 ofs, const s64 cnt,
|
||||||
const u8 val);
|
const u8 val);
|
||||||
|
|
||||||
|
|
|
||||||
Loading…
Reference in New Issue