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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 2005-10-04 15:18:56 +01:00
parent 2a6fc4e1b0
commit 2d86829b84
3 changed files with 640 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
fs/ntfs/ChangeLog
View File

@ -47,6 +47,9 @@ ToDo/Notes:
which is zero for a resident attribute but should no longer be zero
once the attribute is non-resident as it then has real clusters
allocated.
- 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.
2.1.24 - Lots of bug fixes and support more clean journal states.

634
fs/ntfs/attrib.c
View File

@ -1834,6 +1834,640 @@ page_err_out:
return err;
}
/**
* ntfs_attr_extend_allocation - extend the allocated space of an attribute
* @ni: ntfs inode of the attribute whose allocation to extend
* @new_alloc_size: new size in bytes to which to extend the allocation to
* @new_data_size: new size in bytes to which to extend the data to
* @data_start: beginning of region which is required to be non-sparse
*
* Extend the allocated space of an attribute described by the ntfs inode @ni
* to @new_alloc_size bytes. If @data_start is -1, the whole extension may be
* implemented as a hole in the file (as long as both the volume and the ntfs
* inode @ni have sparse support enabled). If @data_start is >= 0, then the
* region between the old allocated size and @data_start - 1 may be made sparse
* but the regions between @data_start and @new_alloc_size must be backed by
* actual clusters.
*
* If @new_data_size is -1, it is ignored. If it is >= 0, then the data size
* of the attribute is extended to @new_data_size. Note that the i_size of the
* vfs inode is not updated. Only the data size in the base attribute record
* is updated. The caller has to update i_size separately if this is required.
* WARNING: It is a BUG() for @new_data_size to be smaller than the old data
* size as well as for @new_data_size to be greater than @new_alloc_size.
*
* For resident attributes this involves resizing the attribute record and if
* necessary moving it and/or other attributes into extent mft records and/or
* converting the attribute to a non-resident attribute which in turn involves
* extending the allocation of a non-resident attribute as described below.
*
* For non-resident attributes this involves allocating clusters in the data
* zone on the volume (except for regions that are being made sparse) and
* extending the run list to describe the allocated clusters as well as
* updating the mapping pairs array of the attribute. This in turn involves
* resizing the attribute record and if necessary moving it and/or other
* attributes into extent mft records and/or splitting the attribute record
* into multiple extent attribute records.
*
* Also, the attribute list attribute is updated if present and in some of the
* above cases (the ones where extent mft records/attributes come into play),
* an attribute list attribute is created if not already present.
*
* Return the new allocated size on success and -errno on error. In the case
* that an error is encountered but a partial extension at least up to
* @data_start (if present) is possible, the allocation is partially extended
* and this is returned. This means the caller must check the returned size to
* determine if the extension was partial. If @data_start is -1 then partial
* allocations are not performed.
*
* WARNING: Do not call ntfs_attr_extend_allocation() for $MFT/$DATA.
*
* Locking: This function takes the runlist lock of @ni for writing as well as
* locking the mft record of the base ntfs inode. These locks are maintained
* throughout execution of the function. These locks are required so that the
* attribute can be resized safely and so that it can for example be converted
* from resident to non-resident safely.
*
* TODO: At present attribute list attribute handling is not implemented.
*
* TODO: At present it is not safe to call this function for anything other
* than the $DATA attribute(s) of an uncompressed and unencrypted file.
*/
s64 ntfs_attr_extend_allocation(ntfs_inode *ni, s64 new_alloc_size,
const s64 new_data_size, const s64 data_start)
{
VCN vcn;
s64 ll, allocated_size, start = data_start;
struct inode *vi = VFS_I(ni);
ntfs_volume *vol = ni->vol;
ntfs_inode *base_ni;
MFT_RECORD *m;
ATTR_RECORD *a;
ntfs_attr_search_ctx *ctx;
runlist_element *rl, *rl2;
unsigned long flags;
int err, mp_size;
u32 attr_len = 0; /* Silence stupid gcc warning. */
BOOL mp_rebuilt;
#ifdef NTFS_DEBUG
read_lock_irqsave(&ni->size_lock, flags);
allocated_size = ni->allocated_size;
read_unlock_irqrestore(&ni->size_lock, flags);
ntfs_debug("Entering for i_ino 0x%lx, attribute type 0x%x, "
"old_allocated_size 0x%llx, "
"new_allocated_size 0x%llx, new_data_size 0x%llx, "
"data_start 0x%llx.", vi->i_ino,
(unsigned)le32_to_cpu(ni->type),
(unsigned long long)allocated_size,
(unsigned long long)new_alloc_size,
(unsigned long long)new_data_size,
(unsigned long long)start);
#endif
retry_extend:
/*
* For non-resident attributes, @start and @new_size need to be aligned
* to cluster boundaries for allocation purposes.
*/
if (NInoNonResident(ni)) {
if (start > 0)
start &= ~(s64)vol->cluster_size_mask;
new_alloc_size = (new_alloc_size + vol->cluster_size - 1) &
~(s64)vol->cluster_size_mask;
}
BUG_ON(new_data_size >= 0 && new_data_size > new_alloc_size);
/* Check if new size is allowed in $AttrDef. */
err = ntfs_attr_size_bounds_check(vol, ni->type, new_alloc_size);
if (unlikely(err)) {
/* Only emit errors when the write will fail completely. */
read_lock_irqsave(&ni->size_lock, flags);
allocated_size = ni->allocated_size;
read_unlock_irqrestore(&ni->size_lock, flags);
if (start < 0 || start >= allocated_size) {
if (err == -ERANGE) {
ntfs_error(vol->sb, "Cannot extend allocation "
"of inode 0x%lx, attribute "
"type 0x%x, because the new "
"allocation would exceed the "
"maximum allowed size for "
"this attribute type.",
vi->i_ino, (unsigned)
le32_to_cpu(ni->type));
} else {
ntfs_error(vol->sb, "Cannot extend allocation "
"of inode 0x%lx, attribute "
"type 0x%x, because this "
"attribute type is not "
"defined on the NTFS volume. "
"Possible corruption! You "
"should run chkdsk!",
vi->i_ino, (unsigned)
le32_to_cpu(ni->type));
}
}
/* Translate error code to be POSIX conformant for write(2). */
if (err == -ERANGE)
err = -EFBIG;
else
err = -EIO;
return err;
}
if (!NInoAttr(ni))
base_ni = ni;
else
base_ni = ni->ext.base_ntfs_ino;
/*
* We will be modifying both the runlist (if non-resident) and the mft
* record so lock them both down.
*/
down_write(&ni->runlist.lock);
m = map_mft_record(base_ni);
if (IS_ERR(m)) {
err = PTR_ERR(m);
m = NULL;
ctx = NULL;
goto err_out;
}
ctx = ntfs_attr_get_search_ctx(base_ni, m);
if (unlikely(!ctx)) {
err = -ENOMEM;
goto err_out;
}
read_lock_irqsave(&ni->size_lock, flags);
allocated_size = ni->allocated_size;
read_unlock_irqrestore(&ni->size_lock, flags);
/*
* If non-resident, seek to the last extent. If resident, there is
* only one extent, so seek to that.
*/
vcn = NInoNonResident(ni) ? allocated_size >> vol->cluster_size_bits :
0;
/*
* Abort if someone did the work whilst we waited for the locks. If we
* just converted the attribute from resident to non-resident it is
* likely that exactly this has happened already. We cannot quite
* abort if we need to update the data size.
*/
if (unlikely(new_alloc_size <= allocated_size)) {
ntfs_debug("Allocated size already exceeds requested size.");
new_alloc_size = allocated_size;
if (new_data_size < 0)
goto done;
/*
* We want the first attribute extent so that we can update the
* data size.
*/
vcn = 0;
}
err = ntfs_attr_lookup(ni->type, ni->name, ni->name_len,
CASE_SENSITIVE, vcn, NULL, 0, ctx);
if (unlikely(err)) {
if (err == -ENOENT)
err = -EIO;
goto err_out;
}
m = ctx->mrec;
a = ctx->attr;
/* Use goto to reduce indentation. */
if (a->non_resident)
goto do_non_resident_extend;
BUG_ON(NInoNonResident(ni));
/* The total length of the attribute value. */
attr_len = le32_to_cpu(a->data.resident.value_length);
/*
* Extend the attribute record to be able to store the new attribute
* size. ntfs_attr_record_resize() will not do anything if the size is
* not changing.
*/
if (new_alloc_size < vol->mft_record_size &&
!ntfs_attr_record_resize(m, a,
le16_to_cpu(a->data.resident.value_offset) +
new_alloc_size)) {
/* The resize succeeded! */
write_lock_irqsave(&ni->size_lock, flags);
ni->allocated_size = le32_to_cpu(a->length) -
le16_to_cpu(a->data.resident.value_offset);
write_unlock_irqrestore(&ni->size_lock, flags);
if (new_data_size >= 0) {
BUG_ON(new_data_size < attr_len);
a->data.resident.value_length =
cpu_to_le32((u32)new_data_size);
}
goto flush_done;
}
/*
* We have to drop all the locks so we can call
* ntfs_attr_make_non_resident(). This could be optimised by try-
* locking the first page cache page and only if that fails dropping
* the locks, locking the page, and redoing all the locking and
* lookups. While this would be a huge optimisation, it is not worth
* it as this is definitely a slow code path.
*/
ntfs_attr_put_search_ctx(ctx);
unmap_mft_record(base_ni);
up_write(&ni->runlist.lock);
/*
* Not enough space in the mft record, try to make the attribute
* non-resident and if successful restart the extension process.
*/
err = ntfs_attr_make_non_resident(ni, attr_len);
if (likely(!err))
goto retry_extend;
/*
* Could not make non-resident. If this is due to this not being
* permitted for this attribute type or there not being enough space,
* try to make other attributes non-resident. Otherwise fail.
*/
if (unlikely(err != -EPERM && err != -ENOSPC)) {
/* Only emit errors when the write will fail completely. */
read_lock_irqsave(&ni->size_lock, flags);
allocated_size = ni->allocated_size;
read_unlock_irqrestore(&ni->size_lock, flags);
if (start < 0 || start >= allocated_size)
ntfs_error(vol->sb, "Cannot extend allocation of "
"inode 0x%lx, attribute type 0x%x, "
"because the conversion from resident "
"to non-resident attribute failed "
"with error code %i.", vi->i_ino,
(unsigned)le32_to_cpu(ni->type), err);
if (err != -ENOMEM)
err = -EIO;
goto conv_err_out;
}
/* TODO: Not implemented from here, abort. */
read_lock_irqsave(&ni->size_lock, flags);
allocated_size = ni->allocated_size;
read_unlock_irqrestore(&ni->size_lock, flags);
if (start < 0 || start >= allocated_size) {
if (err == -ENOSPC)
ntfs_error(vol->sb, "Not enough space in the mft "
"record/on disk for the non-resident "
"attribute value. This case is not "
"implemented yet.");
else /* if (err == -EPERM) */
ntfs_error(vol->sb, "This attribute type may not be "
"non-resident. This case is not "
"implemented yet.");
}
err = -EOPNOTSUPP;
goto conv_err_out;
#if 0
// TODO: Attempt to make other attributes non-resident.
if (!err)
goto do_resident_extend;
/*
* Both the attribute list attribute and the standard information
* attribute must remain in the base inode. Thus, if this is one of
* these attributes, we have to try to move other attributes out into
* extent mft records instead.
*/
if (ni->type == AT_ATTRIBUTE_LIST ||
ni->type == AT_STANDARD_INFORMATION) {
// TODO: Attempt to move other attributes into extent mft
// records.
err = -EOPNOTSUPP;
if (!err)
goto do_resident_extend;
goto err_out;
}
// TODO: Attempt to move this attribute to an extent mft record, but
// only if it is not already the only attribute in an mft record in
// which case there would be nothing to gain.
err = -EOPNOTSUPP;
if (!err)
goto do_resident_extend;
/* There is nothing we can do to make enough space. )-: */
goto err_out;
#endif
do_non_resident_extend:
BUG_ON(!NInoNonResident(ni));
if (new_alloc_size == allocated_size) {
BUG_ON(vcn);
goto alloc_done;
}
/*
* If the data starts after the end of the old allocation, this is a
* $DATA attribute and sparse attributes are enabled on the volume and
* for this inode, then create a sparse region between the old
* allocated size and the start of the data. Otherwise simply proceed
* with filling the whole space between the old allocated size and the
* new allocated size with clusters.
*/
if ((start >= 0 && start <= allocated_size) || ni->type != AT_DATA ||
!NVolSparseEnabled(vol) || NInoSparseDisabled(ni))
goto skip_sparse;
// TODO: This is not implemented yet. We just fill in with real
// clusters for now...
ntfs_debug("Inserting holes is not-implemented yet. Falling back to "
"allocating real clusters instead.");
skip_sparse:
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
* @ni: ntfs inode describing the attribute to fill

3
fs/ntfs/attrib.h
View File

@ -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 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,
const u8 val);