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- #include <linux/buffer_head.h>
- #include <linux/slab.h>
- #include <linux/swap.h>
- #include "attrib.h"
- #include "aops.h"
- #include "bitmap.h"
- #include "debug.h"
- #include "dir.h"
- #include "lcnalloc.h"
- #include "malloc.h"
- #include "mft.h"
- #include "ntfs.h"
- static inline MFT_RECORD *map_mft_record_page(ntfs_inode *ni)
- {
- loff_t i_size;
- ntfs_volume *vol = ni->vol;
- struct inode *mft_vi = vol->mft_ino;
- struct page *page;
- unsigned long index, end_index;
- unsigned ofs;
- BUG_ON(ni->page);
-
- index = (u64)ni->mft_no << vol->mft_record_size_bits >>
- PAGE_SHIFT;
- ofs = (ni->mft_no << vol->mft_record_size_bits) & ~PAGE_MASK;
- i_size = i_size_read(mft_vi);
-
- end_index = i_size >> PAGE_SHIFT;
-
- if (unlikely(index >= end_index)) {
- if (index > end_index || (i_size & ~PAGE_MASK) < ofs +
- vol->mft_record_size) {
- page = ERR_PTR(-ENOENT);
- ntfs_error(vol->sb, "Attempt to read mft record 0x%lx, "
- "which is beyond the end of the mft. "
- "This is probably a bug in the ntfs "
- "driver.", ni->mft_no);
- goto err_out;
- }
- }
-
- page = ntfs_map_page(mft_vi->i_mapping, index);
- if (likely(!IS_ERR(page))) {
-
- if (likely(ntfs_is_mft_recordp((le32*)(page_address(page) +
- ofs)))) {
- ni->page = page;
- ni->page_ofs = ofs;
- return page_address(page) + ofs;
- }
- ntfs_error(vol->sb, "Mft record 0x%lx is corrupt. "
- "Run chkdsk.", ni->mft_no);
- ntfs_unmap_page(page);
- page = ERR_PTR(-EIO);
- NVolSetErrors(vol);
- }
- err_out:
- ni->page = NULL;
- ni->page_ofs = 0;
- return (void*)page;
- }
- MFT_RECORD *map_mft_record(ntfs_inode *ni)
- {
- MFT_RECORD *m;
- ntfs_debug("Entering for mft_no 0x%lx.", ni->mft_no);
-
- atomic_inc(&ni->count);
-
- mutex_lock(&ni->mrec_lock);
- m = map_mft_record_page(ni);
- if (likely(!IS_ERR(m)))
- return m;
- mutex_unlock(&ni->mrec_lock);
- atomic_dec(&ni->count);
- ntfs_error(ni->vol->sb, "Failed with error code %lu.", -PTR_ERR(m));
- return m;
- }
- static inline void unmap_mft_record_page(ntfs_inode *ni)
- {
- BUG_ON(!ni->page);
-
- ntfs_unmap_page(ni->page);
- ni->page = NULL;
- ni->page_ofs = 0;
- return;
- }
- void unmap_mft_record(ntfs_inode *ni)
- {
- struct page *page = ni->page;
- BUG_ON(!page);
- ntfs_debug("Entering for mft_no 0x%lx.", ni->mft_no);
- unmap_mft_record_page(ni);
- mutex_unlock(&ni->mrec_lock);
- atomic_dec(&ni->count);
-
- return;
- }
- MFT_RECORD *map_extent_mft_record(ntfs_inode *base_ni, MFT_REF mref,
- ntfs_inode **ntfs_ino)
- {
- MFT_RECORD *m;
- ntfs_inode *ni = NULL;
- ntfs_inode **extent_nis = NULL;
- int i;
- unsigned long mft_no = MREF(mref);
- u16 seq_no = MSEQNO(mref);
- bool destroy_ni = false;
- ntfs_debug("Mapping extent mft record 0x%lx (base mft record 0x%lx).",
- mft_no, base_ni->mft_no);
-
- atomic_inc(&base_ni->count);
-
- mutex_lock(&base_ni->extent_lock);
- if (base_ni->nr_extents > 0) {
- extent_nis = base_ni->ext.extent_ntfs_inos;
- for (i = 0; i < base_ni->nr_extents; i++) {
- if (mft_no != extent_nis[i]->mft_no)
- continue;
- ni = extent_nis[i];
-
- atomic_inc(&ni->count);
- break;
- }
- }
- if (likely(ni != NULL)) {
- mutex_unlock(&base_ni->extent_lock);
- atomic_dec(&base_ni->count);
-
- m = map_mft_record(ni);
-
- atomic_dec(&ni->count);
- if (likely(!IS_ERR(m))) {
-
- if (likely(le16_to_cpu(m->sequence_number) == seq_no)) {
- ntfs_debug("Done 1.");
- *ntfs_ino = ni;
- return m;
- }
- unmap_mft_record(ni);
- ntfs_error(base_ni->vol->sb, "Found stale extent mft "
- "reference! Corrupt filesystem. "
- "Run chkdsk.");
- return ERR_PTR(-EIO);
- }
- map_err_out:
- ntfs_error(base_ni->vol->sb, "Failed to map extent "
- "mft record, error code %ld.", -PTR_ERR(m));
- return m;
- }
-
- ni = ntfs_new_extent_inode(base_ni->vol->sb, mft_no);
- if (unlikely(!ni)) {
- mutex_unlock(&base_ni->extent_lock);
- atomic_dec(&base_ni->count);
- return ERR_PTR(-ENOMEM);
- }
- ni->vol = base_ni->vol;
- ni->seq_no = seq_no;
- ni->nr_extents = -1;
- ni->ext.base_ntfs_ino = base_ni;
-
- m = map_mft_record(ni);
- if (IS_ERR(m)) {
- mutex_unlock(&base_ni->extent_lock);
- atomic_dec(&base_ni->count);
- ntfs_clear_extent_inode(ni);
- goto map_err_out;
- }
-
- if (seq_no && (le16_to_cpu(m->sequence_number) != seq_no)) {
- ntfs_error(base_ni->vol->sb, "Found stale extent mft "
- "reference! Corrupt filesystem. Run chkdsk.");
- destroy_ni = true;
- m = ERR_PTR(-EIO);
- goto unm_err_out;
- }
-
- if (!(base_ni->nr_extents & 3)) {
- ntfs_inode **tmp;
- int new_size = (base_ni->nr_extents + 4) * sizeof(ntfs_inode *);
- tmp = kmalloc(new_size, GFP_NOFS);
- if (unlikely(!tmp)) {
- ntfs_error(base_ni->vol->sb, "Failed to allocate "
- "internal buffer.");
- destroy_ni = true;
- m = ERR_PTR(-ENOMEM);
- goto unm_err_out;
- }
- if (base_ni->nr_extents) {
- BUG_ON(!base_ni->ext.extent_ntfs_inos);
- memcpy(tmp, base_ni->ext.extent_ntfs_inos, new_size -
- 4 * sizeof(ntfs_inode *));
- kfree(base_ni->ext.extent_ntfs_inos);
- }
- base_ni->ext.extent_ntfs_inos = tmp;
- }
- base_ni->ext.extent_ntfs_inos[base_ni->nr_extents++] = ni;
- mutex_unlock(&base_ni->extent_lock);
- atomic_dec(&base_ni->count);
- ntfs_debug("Done 2.");
- *ntfs_ino = ni;
- return m;
- unm_err_out:
- unmap_mft_record(ni);
- mutex_unlock(&base_ni->extent_lock);
- atomic_dec(&base_ni->count);
-
- if (destroy_ni)
- ntfs_clear_extent_inode(ni);
- return m;
- }
- #ifdef NTFS_RW
- void __mark_mft_record_dirty(ntfs_inode *ni)
- {
- ntfs_inode *base_ni;
- ntfs_debug("Entering for inode 0x%lx.", ni->mft_no);
- BUG_ON(NInoAttr(ni));
- mark_ntfs_record_dirty(ni->page, ni->page_ofs);
-
- mutex_lock(&ni->extent_lock);
- if (likely(ni->nr_extents >= 0))
- base_ni = ni;
- else
- base_ni = ni->ext.base_ntfs_ino;
- mutex_unlock(&ni->extent_lock);
- __mark_inode_dirty(VFS_I(base_ni), I_DIRTY_SYNC | I_DIRTY_DATASYNC);
- }
- static const char *ntfs_please_email = "Please email "
- "linux-ntfs-dev@lists.sourceforge.net and say that you saw "
- "this message. Thank you.";
- static int ntfs_sync_mft_mirror_umount(ntfs_volume *vol,
- const unsigned long mft_no, MFT_RECORD *m)
- {
- BUG_ON(vol->mftmirr_ino);
- ntfs_error(vol->sb, "Umount time mft mirror syncing is not "
- "implemented yet. %s", ntfs_please_email);
- return -EOPNOTSUPP;
- }
- int ntfs_sync_mft_mirror(ntfs_volume *vol, const unsigned long mft_no,
- MFT_RECORD *m, int sync)
- {
- struct page *page;
- unsigned int blocksize = vol->sb->s_blocksize;
- int max_bhs = vol->mft_record_size / blocksize;
- struct buffer_head *bhs[max_bhs];
- struct buffer_head *bh, *head;
- u8 *kmirr;
- runlist_element *rl;
- unsigned int block_start, block_end, m_start, m_end, page_ofs;
- int i_bhs, nr_bhs, err = 0;
- unsigned char blocksize_bits = vol->sb->s_blocksize_bits;
- ntfs_debug("Entering for inode 0x%lx.", mft_no);
- BUG_ON(!max_bhs);
- if (unlikely(!vol->mftmirr_ino)) {
-
- err = ntfs_sync_mft_mirror_umount(vol, mft_no, m);
- if (likely(!err))
- return err;
- goto err_out;
- }
-
- page = ntfs_map_page(vol->mftmirr_ino->i_mapping, mft_no >>
- (PAGE_SHIFT - vol->mft_record_size_bits));
- if (IS_ERR(page)) {
- ntfs_error(vol->sb, "Failed to map mft mirror page.");
- err = PTR_ERR(page);
- goto err_out;
- }
- lock_page(page);
- BUG_ON(!PageUptodate(page));
- ClearPageUptodate(page);
-
- page_ofs = (mft_no << vol->mft_record_size_bits) & ~PAGE_MASK;
-
- kmirr = page_address(page) + page_ofs;
-
- memcpy(kmirr, m, vol->mft_record_size);
-
- if (unlikely(!page_has_buffers(page))) {
- struct buffer_head *tail;
- bh = head = alloc_page_buffers(page, blocksize, 1);
- do {
- set_buffer_uptodate(bh);
- tail = bh;
- bh = bh->b_this_page;
- } while (bh);
- tail->b_this_page = head;
- attach_page_buffers(page, head);
- }
- bh = head = page_buffers(page);
- BUG_ON(!bh);
- rl = NULL;
- nr_bhs = 0;
- block_start = 0;
- m_start = kmirr - (u8*)page_address(page);
- m_end = m_start + vol->mft_record_size;
- do {
- block_end = block_start + blocksize;
-
- if (block_end <= m_start)
- continue;
- if (unlikely(block_start >= m_end))
- break;
-
- if (unlikely(!buffer_mapped(bh))) {
- VCN vcn;
- LCN lcn;
- unsigned int vcn_ofs;
- bh->b_bdev = vol->sb->s_bdev;
-
- vcn = ((VCN)mft_no << vol->mft_record_size_bits) +
- (block_start - m_start);
- vcn_ofs = vcn & vol->cluster_size_mask;
- vcn >>= vol->cluster_size_bits;
- if (!rl) {
- down_read(&NTFS_I(vol->mftmirr_ino)->
- runlist.lock);
- rl = NTFS_I(vol->mftmirr_ino)->runlist.rl;
-
- BUG_ON(!rl);
- }
-
- while (rl->length && rl[1].vcn <= vcn)
- rl++;
- lcn = ntfs_rl_vcn_to_lcn(rl, vcn);
-
- if (likely(lcn >= 0)) {
-
- bh->b_blocknr = ((lcn <<
- vol->cluster_size_bits) +
- vcn_ofs) >> blocksize_bits;
- set_buffer_mapped(bh);
- } else {
- bh->b_blocknr = -1;
- ntfs_error(vol->sb, "Cannot write mft mirror "
- "record 0x%lx because its "
- "location on disk could not "
- "be determined (error code "
- "%lli).", mft_no,
- (long long)lcn);
- err = -EIO;
- }
- }
- BUG_ON(!buffer_uptodate(bh));
- BUG_ON(!nr_bhs && (m_start != block_start));
- BUG_ON(nr_bhs >= max_bhs);
- bhs[nr_bhs++] = bh;
- BUG_ON((nr_bhs >= max_bhs) && (m_end != block_end));
- } while (block_start = block_end, (bh = bh->b_this_page) != head);
- if (unlikely(rl))
- up_read(&NTFS_I(vol->mftmirr_ino)->runlist.lock);
- if (likely(!err)) {
-
- for (i_bhs = 0; i_bhs < nr_bhs; i_bhs++) {
- struct buffer_head *tbh = bhs[i_bhs];
- if (!trylock_buffer(tbh))
- BUG();
- BUG_ON(!buffer_uptodate(tbh));
- clear_buffer_dirty(tbh);
- get_bh(tbh);
- tbh->b_end_io = end_buffer_write_sync;
- submit_bh(REQ_OP_WRITE, 0, tbh);
- }
-
- for (i_bhs = 0; i_bhs < nr_bhs; i_bhs++) {
- struct buffer_head *tbh = bhs[i_bhs];
- wait_on_buffer(tbh);
- if (unlikely(!buffer_uptodate(tbh))) {
- err = -EIO;
-
- set_buffer_uptodate(tbh);
- }
- }
- } else {
-
- for (i_bhs = 0; i_bhs < nr_bhs; i_bhs++)
- clear_buffer_dirty(bhs[i_bhs]);
- }
-
-
- post_write_mst_fixup((NTFS_RECORD*)kmirr);
- flush_dcache_page(page);
- SetPageUptodate(page);
- unlock_page(page);
- ntfs_unmap_page(page);
- if (likely(!err)) {
- ntfs_debug("Done.");
- } else {
- ntfs_error(vol->sb, "I/O error while writing mft mirror "
- "record 0x%lx!", mft_no);
- err_out:
- ntfs_error(vol->sb, "Failed to synchronize $MFTMirr (error "
- "code %i). Volume will be left marked dirty "
- "on umount. Run ntfsfix on the partition "
- "after umounting to correct this.", -err);
- NVolSetErrors(vol);
- }
- return err;
- }
- int write_mft_record_nolock(ntfs_inode *ni, MFT_RECORD *m, int sync)
- {
- ntfs_volume *vol = ni->vol;
- struct page *page = ni->page;
- unsigned int blocksize = vol->sb->s_blocksize;
- unsigned char blocksize_bits = vol->sb->s_blocksize_bits;
- int max_bhs = vol->mft_record_size / blocksize;
- struct buffer_head *bhs[max_bhs];
- struct buffer_head *bh, *head;
- runlist_element *rl;
- unsigned int block_start, block_end, m_start, m_end;
- int i_bhs, nr_bhs, err = 0;
- ntfs_debug("Entering for inode 0x%lx.", ni->mft_no);
- BUG_ON(NInoAttr(ni));
- BUG_ON(!max_bhs);
- BUG_ON(!PageLocked(page));
-
- if (!NInoTestClearDirty(ni))
- goto done;
- bh = head = page_buffers(page);
- BUG_ON(!bh);
- rl = NULL;
- nr_bhs = 0;
- block_start = 0;
- m_start = ni->page_ofs;
- m_end = m_start + vol->mft_record_size;
- do {
- block_end = block_start + blocksize;
-
- if (block_end <= m_start)
- continue;
- if (unlikely(block_start >= m_end))
- break;
-
- if (block_start == m_start) {
-
- if (!buffer_dirty(bh)) {
- BUG_ON(nr_bhs);
-
- break;
- }
- }
-
- if (unlikely(!buffer_mapped(bh))) {
- VCN vcn;
- LCN lcn;
- unsigned int vcn_ofs;
- bh->b_bdev = vol->sb->s_bdev;
-
- vcn = ((VCN)ni->mft_no << vol->mft_record_size_bits) +
- (block_start - m_start);
- vcn_ofs = vcn & vol->cluster_size_mask;
- vcn >>= vol->cluster_size_bits;
- if (!rl) {
- down_read(&NTFS_I(vol->mft_ino)->runlist.lock);
- rl = NTFS_I(vol->mft_ino)->runlist.rl;
- BUG_ON(!rl);
- }
-
- while (rl->length && rl[1].vcn <= vcn)
- rl++;
- lcn = ntfs_rl_vcn_to_lcn(rl, vcn);
-
- if (likely(lcn >= 0)) {
-
- bh->b_blocknr = ((lcn <<
- vol->cluster_size_bits) +
- vcn_ofs) >> blocksize_bits;
- set_buffer_mapped(bh);
- } else {
- bh->b_blocknr = -1;
- ntfs_error(vol->sb, "Cannot write mft record "
- "0x%lx because its location "
- "on disk could not be "
- "determined (error code %lli).",
- ni->mft_no, (long long)lcn);
- err = -EIO;
- }
- }
- BUG_ON(!buffer_uptodate(bh));
- BUG_ON(!nr_bhs && (m_start != block_start));
- BUG_ON(nr_bhs >= max_bhs);
- bhs[nr_bhs++] = bh;
- BUG_ON((nr_bhs >= max_bhs) && (m_end != block_end));
- } while (block_start = block_end, (bh = bh->b_this_page) != head);
- if (unlikely(rl))
- up_read(&NTFS_I(vol->mft_ino)->runlist.lock);
- if (!nr_bhs)
- goto done;
- if (unlikely(err))
- goto cleanup_out;
-
- err = pre_write_mst_fixup((NTFS_RECORD*)m, vol->mft_record_size);
- if (err) {
- ntfs_error(vol->sb, "Failed to apply mst fixups!");
- goto cleanup_out;
- }
- flush_dcache_mft_record_page(ni);
-
- for (i_bhs = 0; i_bhs < nr_bhs; i_bhs++) {
- struct buffer_head *tbh = bhs[i_bhs];
- if (!trylock_buffer(tbh))
- BUG();
- BUG_ON(!buffer_uptodate(tbh));
- clear_buffer_dirty(tbh);
- get_bh(tbh);
- tbh->b_end_io = end_buffer_write_sync;
- submit_bh(REQ_OP_WRITE, 0, tbh);
- }
-
- if (!sync && ni->mft_no < vol->mftmirr_size)
- ntfs_sync_mft_mirror(vol, ni->mft_no, m, sync);
-
- for (i_bhs = 0; i_bhs < nr_bhs; i_bhs++) {
- struct buffer_head *tbh = bhs[i_bhs];
- wait_on_buffer(tbh);
- if (unlikely(!buffer_uptodate(tbh))) {
- err = -EIO;
-
- if (PageUptodate(page))
- set_buffer_uptodate(tbh);
- }
- }
-
- if (sync && ni->mft_no < vol->mftmirr_size)
- ntfs_sync_mft_mirror(vol, ni->mft_no, m, sync);
-
- post_write_mst_fixup((NTFS_RECORD*)m);
- flush_dcache_mft_record_page(ni);
- if (unlikely(err)) {
-
- ntfs_error(vol->sb, "I/O error while writing mft record "
- "0x%lx! Marking base inode as bad. You "
- "should unmount the volume and run chkdsk.",
- ni->mft_no);
- goto err_out;
- }
- done:
- ntfs_debug("Done.");
- return 0;
- cleanup_out:
-
- for (i_bhs = 0; i_bhs < nr_bhs; i_bhs++)
- clear_buffer_dirty(bhs[i_bhs]);
- err_out:
-
- if (err == -ENOMEM) {
- ntfs_error(vol->sb, "Not enough memory to write mft record. "
- "Redirtying so the write is retried later.");
- mark_mft_record_dirty(ni);
- err = 0;
- } else
- NVolSetErrors(vol);
- return err;
- }
- bool ntfs_may_write_mft_record(ntfs_volume *vol, const unsigned long mft_no,
- const MFT_RECORD *m, ntfs_inode **locked_ni)
- {
- struct super_block *sb = vol->sb;
- struct inode *mft_vi = vol->mft_ino;
- struct inode *vi;
- ntfs_inode *ni, *eni, **extent_nis;
- int i;
- ntfs_attr na;
- ntfs_debug("Entering for inode 0x%lx.", mft_no);
-
- BUG_ON(!locked_ni);
- *locked_ni = NULL;
-
- ntfs_debug("Looking for inode 0x%lx in icache.", mft_no);
- na.mft_no = mft_no;
- na.name = NULL;
- na.name_len = 0;
- na.type = AT_UNUSED;
-
- if (!mft_no) {
-
- vi = igrab(mft_vi);
- BUG_ON(vi != mft_vi);
- } else {
-
- vi = ilookup5_nowait(sb, mft_no, (test_t)ntfs_test_inode, &na);
- }
- if (vi) {
- ntfs_debug("Base inode 0x%lx is in icache.", mft_no);
-
- ni = NTFS_I(vi);
-
- atomic_inc(&ni->count);
-
- if (NInoDirty(ni)) {
- ntfs_debug("Inode 0x%lx is dirty, do not write it.",
- mft_no);
- atomic_dec(&ni->count);
- iput(vi);
- return false;
- }
- ntfs_debug("Inode 0x%lx is not dirty.", mft_no);
-
- if (unlikely(!mutex_trylock(&ni->mrec_lock))) {
- ntfs_debug("Mft record 0x%lx is already locked, do "
- "not write it.", mft_no);
- atomic_dec(&ni->count);
- iput(vi);
- return false;
- }
- ntfs_debug("Managed to lock mft record 0x%lx, write it.",
- mft_no);
-
- *locked_ni = ni;
- return true;
- }
- ntfs_debug("Inode 0x%lx is not in icache.", mft_no);
-
-
- if (!ntfs_is_mft_record(m->magic)) {
- ntfs_debug("Mft record 0x%lx is not a FILE record, write it.",
- mft_no);
- return true;
- }
-
- if (!m->base_mft_record) {
- ntfs_debug("Mft record 0x%lx is a base record, write it.",
- mft_no);
- return true;
- }
-
- na.mft_no = MREF_LE(m->base_mft_record);
- ntfs_debug("Mft record 0x%lx is an extent record. Looking for base "
- "inode 0x%lx in icache.", mft_no, na.mft_no);
- if (!na.mft_no) {
-
- vi = igrab(mft_vi);
- BUG_ON(vi != mft_vi);
- } else
- vi = ilookup5_nowait(sb, na.mft_no, (test_t)ntfs_test_inode,
- &na);
- if (!vi) {
-
- ntfs_debug("Base inode 0x%lx is not in icache, write the "
- "extent record.", na.mft_no);
- return true;
- }
- ntfs_debug("Base inode 0x%lx is in icache.", na.mft_no);
-
- ni = NTFS_I(vi);
- mutex_lock(&ni->extent_lock);
- if (ni->nr_extents <= 0) {
-
- mutex_unlock(&ni->extent_lock);
- iput(vi);
- ntfs_debug("Base inode 0x%lx has no attached extent inodes, "
- "write the extent record.", na.mft_no);
- return true;
- }
-
- extent_nis = ni->ext.extent_ntfs_inos;
- for (eni = NULL, i = 0; i < ni->nr_extents; ++i) {
- if (mft_no == extent_nis[i]->mft_no) {
-
- eni = extent_nis[i];
- break;
- }
- }
-
- if (!eni) {
- mutex_unlock(&ni->extent_lock);
- iput(vi);
- ntfs_debug("Extent inode 0x%lx is not attached to its base "
- "inode 0x%lx, write the extent record.",
- mft_no, na.mft_no);
- return true;
- }
- ntfs_debug("Extent inode 0x%lx is attached to its base inode 0x%lx.",
- mft_no, na.mft_no);
-
- atomic_inc(&eni->count);
- mutex_unlock(&ni->extent_lock);
-
- if (unlikely(!mutex_trylock(&eni->mrec_lock))) {
- atomic_dec(&eni->count);
- iput(vi);
- ntfs_debug("Extent mft record 0x%lx is already locked, do "
- "not write it.", mft_no);
- return false;
- }
- ntfs_debug("Managed to lock extent mft record 0x%lx, write it.",
- mft_no);
- if (NInoTestClearDirty(eni))
- ntfs_debug("Extent inode 0x%lx is dirty, marking it clean.",
- mft_no);
-
- *locked_ni = eni;
- return true;
- }
- static const char *es = " Leaving inconsistent metadata. Unmount and run "
- "chkdsk.";
- static int ntfs_mft_bitmap_find_and_alloc_free_rec_nolock(ntfs_volume *vol,
- ntfs_inode *base_ni)
- {
- s64 pass_end, ll, data_pos, pass_start, ofs, bit;
- unsigned long flags;
- struct address_space *mftbmp_mapping;
- u8 *buf, *byte;
- struct page *page;
- unsigned int page_ofs, size;
- u8 pass, b;
- ntfs_debug("Searching for free mft record in the currently "
- "initialized mft bitmap.");
- mftbmp_mapping = vol->mftbmp_ino->i_mapping;
-
- read_lock_irqsave(&NTFS_I(vol->mft_ino)->size_lock, flags);
- pass_end = NTFS_I(vol->mft_ino)->allocated_size >>
- vol->mft_record_size_bits;
- read_unlock_irqrestore(&NTFS_I(vol->mft_ino)->size_lock, flags);
- read_lock_irqsave(&NTFS_I(vol->mftbmp_ino)->size_lock, flags);
- ll = NTFS_I(vol->mftbmp_ino)->initialized_size << 3;
- read_unlock_irqrestore(&NTFS_I(vol->mftbmp_ino)->size_lock, flags);
- if (pass_end > ll)
- pass_end = ll;
- pass = 1;
- if (!base_ni)
- data_pos = vol->mft_data_pos;
- else
- data_pos = base_ni->mft_no + 1;
- if (data_pos < 24)
- data_pos = 24;
- if (data_pos >= pass_end) {
- data_pos = 24;
- pass = 2;
-
- if (data_pos >= pass_end)
- return -ENOSPC;
- }
- pass_start = data_pos;
- ntfs_debug("Starting bitmap search: pass %u, pass_start 0x%llx, "
- "pass_end 0x%llx, data_pos 0x%llx.", pass,
- (long long)pass_start, (long long)pass_end,
- (long long)data_pos);
-
- for (; pass <= 2;) {
-
- ofs = data_pos >> 3;
- page_ofs = ofs & ~PAGE_MASK;
- size = PAGE_SIZE - page_ofs;
- ll = ((pass_end + 7) >> 3) - ofs;
- if (size > ll)
- size = ll;
- size <<= 3;
-
- if (size) {
- page = ntfs_map_page(mftbmp_mapping,
- ofs >> PAGE_SHIFT);
- if (IS_ERR(page)) {
- ntfs_error(vol->sb, "Failed to read mft "
- "bitmap, aborting.");
- return PTR_ERR(page);
- }
- buf = (u8*)page_address(page) + page_ofs;
- bit = data_pos & 7;
- data_pos &= ~7ull;
- ntfs_debug("Before inner for loop: size 0x%x, "
- "data_pos 0x%llx, bit 0x%llx", size,
- (long long)data_pos, (long long)bit);
- for (; bit < size && data_pos + bit < pass_end;
- bit &= ~7ull, bit += 8) {
- byte = buf + (bit >> 3);
- if (*byte == 0xff)
- continue;
- b = ffz((unsigned long)*byte);
- if (b < 8 && b >= (bit & 7)) {
- ll = data_pos + (bit & ~7ull) + b;
- if (unlikely(ll > (1ll << 32))) {
- ntfs_unmap_page(page);
- return -ENOSPC;
- }
- *byte |= 1 << b;
- flush_dcache_page(page);
- set_page_dirty(page);
- ntfs_unmap_page(page);
- ntfs_debug("Done. (Found and "
- "allocated mft record "
- "0x%llx.)",
- (long long)ll);
- return ll;
- }
- }
- ntfs_debug("After inner for loop: size 0x%x, "
- "data_pos 0x%llx, bit 0x%llx", size,
- (long long)data_pos, (long long)bit);
- data_pos += size;
- ntfs_unmap_page(page);
-
- if (data_pos < pass_end)
- continue;
- }
-
- if (++pass == 2) {
-
- pass_end = pass_start;
- data_pos = pass_start = 24;
- ntfs_debug("pass %i, pass_start 0x%llx, pass_end "
- "0x%llx.", pass, (long long)pass_start,
- (long long)pass_end);
- if (data_pos >= pass_end)
- break;
- }
- }
-
- ntfs_debug("Done. (No free mft records left in currently initialized "
- "mft bitmap.)");
- return -ENOSPC;
- }
- static int ntfs_mft_bitmap_extend_allocation_nolock(ntfs_volume *vol)
- {
- LCN lcn;
- s64 ll;
- unsigned long flags;
- struct page *page;
- ntfs_inode *mft_ni, *mftbmp_ni;
- runlist_element *rl, *rl2 = NULL;
- ntfs_attr_search_ctx *ctx = NULL;
- MFT_RECORD *mrec;
- ATTR_RECORD *a = NULL;
- int ret, mp_size;
- u32 old_alen = 0;
- u8 *b, tb;
- struct {
- u8 added_cluster:1;
- u8 added_run:1;
- u8 mp_rebuilt:1;
- } status = { 0, 0, 0 };
- ntfs_debug("Extending mft bitmap allocation.");
- mft_ni = NTFS_I(vol->mft_ino);
- mftbmp_ni = NTFS_I(vol->mftbmp_ino);
-
- down_write(&mftbmp_ni->runlist.lock);
- read_lock_irqsave(&mftbmp_ni->size_lock, flags);
- ll = mftbmp_ni->allocated_size;
- read_unlock_irqrestore(&mftbmp_ni->size_lock, flags);
- rl = ntfs_attr_find_vcn_nolock(mftbmp_ni,
- (ll - 1) >> vol->cluster_size_bits, NULL);
- if (unlikely(IS_ERR(rl) || !rl->length || rl->lcn < 0)) {
- up_write(&mftbmp_ni->runlist.lock);
- ntfs_error(vol->sb, "Failed to determine last allocated "
- "cluster of mft bitmap attribute.");
- if (!IS_ERR(rl))
- ret = -EIO;
- else
- ret = PTR_ERR(rl);
- return ret;
- }
- lcn = rl->lcn + rl->length;
- ntfs_debug("Last lcn of mft bitmap attribute is 0x%llx.",
- (long long)lcn);
-
- ll = lcn >> 3;
- page = ntfs_map_page(vol->lcnbmp_ino->i_mapping,
- ll >> PAGE_SHIFT);
- if (IS_ERR(page)) {
- up_write(&mftbmp_ni->runlist.lock);
- ntfs_error(vol->sb, "Failed to read from lcn bitmap.");
- return PTR_ERR(page);
- }
- b = (u8*)page_address(page) + (ll & ~PAGE_MASK);
- tb = 1 << (lcn & 7ull);
- down_write(&vol->lcnbmp_lock);
- if (*b != 0xff && !(*b & tb)) {
-
- *b |= tb;
- flush_dcache_page(page);
- set_page_dirty(page);
- up_write(&vol->lcnbmp_lock);
- ntfs_unmap_page(page);
-
- rl->length++;
- rl[1].vcn++;
- status.added_cluster = 1;
- ntfs_debug("Appending one cluster to mft bitmap.");
- } else {
- up_write(&vol->lcnbmp_lock);
- ntfs_unmap_page(page);
-
- rl2 = ntfs_cluster_alloc(vol, rl[1].vcn, 1, lcn, DATA_ZONE,
- true);
- if (IS_ERR(rl2)) {
- up_write(&mftbmp_ni->runlist.lock);
- ntfs_error(vol->sb, "Failed to allocate a cluster for "
- "the mft bitmap.");
- return PTR_ERR(rl2);
- }
- rl = ntfs_runlists_merge(mftbmp_ni->runlist.rl, rl2);
- if (IS_ERR(rl)) {
- up_write(&mftbmp_ni->runlist.lock);
- ntfs_error(vol->sb, "Failed to merge runlists for mft "
- "bitmap.");
- if (ntfs_cluster_free_from_rl(vol, rl2)) {
- ntfs_error(vol->sb, "Failed to deallocate "
- "allocated cluster.%s", es);
- NVolSetErrors(vol);
- }
- ntfs_free(rl2);
- return PTR_ERR(rl);
- }
- mftbmp_ni->runlist.rl = rl;
- status.added_run = 1;
- ntfs_debug("Adding one run to mft bitmap.");
-
- for (; rl[1].length; rl++)
- ;
- }
-
- mrec = map_mft_record(mft_ni);
- if (IS_ERR(mrec)) {
- ntfs_error(vol->sb, "Failed to map mft record.");
- ret = PTR_ERR(mrec);
- goto undo_alloc;
- }
- ctx = ntfs_attr_get_search_ctx(mft_ni, mrec);
- if (unlikely(!ctx)) {
- ntfs_error(vol->sb, "Failed to get search context.");
- ret = -ENOMEM;
- goto undo_alloc;
- }
- ret = ntfs_attr_lookup(mftbmp_ni->type, mftbmp_ni->name,
- mftbmp_ni->name_len, CASE_SENSITIVE, rl[1].vcn, NULL,
- 0, ctx);
- if (unlikely(ret)) {
- ntfs_error(vol->sb, "Failed to find last attribute extent of "
- "mft bitmap attribute.");
- if (ret == -ENOENT)
- ret = -EIO;
- goto undo_alloc;
- }
- a = ctx->attr;
- ll = sle64_to_cpu(a->data.non_resident.lowest_vcn);
-
- for (rl2 = rl; rl2 > mftbmp_ni->runlist.rl; rl2--) {
- if (ll >= rl2->vcn)
- break;
- }
- BUG_ON(ll < rl2->vcn);
- BUG_ON(ll >= rl2->vcn + rl2->length);
-
- mp_size = ntfs_get_size_for_mapping_pairs(vol, rl2, ll, -1);
- if (unlikely(mp_size <= 0)) {
- ntfs_error(vol->sb, "Get size for mapping pairs failed for "
- "mft bitmap attribute extent.");
- ret = mp_size;
- if (!ret)
- ret = -EIO;
- goto undo_alloc;
- }
-
- old_alen = le32_to_cpu(a->length);
- ret = ntfs_attr_record_resize(ctx->mrec, a, mp_size +
- le16_to_cpu(a->data.non_resident.mapping_pairs_offset));
- if (unlikely(ret)) {
- if (ret != -ENOSPC) {
- ntfs_error(vol->sb, "Failed to resize attribute "
- "record for mft bitmap attribute.");
- goto undo_alloc;
- }
-
-
-
-
-
- ntfs_error(vol->sb, "Not enough space in this mft record to "
- "accommodate extended mft bitmap attribute "
- "extent. Cannot handle this yet.");
- ret = -EOPNOTSUPP;
- goto undo_alloc;
- }
- status.mp_rebuilt = 1;
-
- ret = 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(ret)) {
- ntfs_error(vol->sb, "Failed to build mapping pairs array for "
- "mft bitmap attribute.");
- goto undo_alloc;
- }
-
- a->data.non_resident.highest_vcn = cpu_to_sle64(rl[1].vcn - 1);
-
- if (a->data.non_resident.lowest_vcn) {
-
- flush_dcache_mft_record_page(ctx->ntfs_ino);
- mark_mft_record_dirty(ctx->ntfs_ino);
- ntfs_attr_reinit_search_ctx(ctx);
- ret = ntfs_attr_lookup(mftbmp_ni->type, mftbmp_ni->name,
- mftbmp_ni->name_len, CASE_SENSITIVE, 0, NULL,
- 0, ctx);
- if (unlikely(ret)) {
- ntfs_error(vol->sb, "Failed to find first attribute "
- "extent of mft bitmap attribute.");
- goto restore_undo_alloc;
- }
- a = ctx->attr;
- }
- write_lock_irqsave(&mftbmp_ni->size_lock, flags);
- mftbmp_ni->allocated_size += vol->cluster_size;
- a->data.non_resident.allocated_size =
- cpu_to_sle64(mftbmp_ni->allocated_size);
- write_unlock_irqrestore(&mftbmp_ni->size_lock, flags);
-
- flush_dcache_mft_record_page(ctx->ntfs_ino);
- mark_mft_record_dirty(ctx->ntfs_ino);
- ntfs_attr_put_search_ctx(ctx);
- unmap_mft_record(mft_ni);
- up_write(&mftbmp_ni->runlist.lock);
- ntfs_debug("Done.");
- return 0;
- restore_undo_alloc:
- ntfs_attr_reinit_search_ctx(ctx);
- if (ntfs_attr_lookup(mftbmp_ni->type, mftbmp_ni->name,
- mftbmp_ni->name_len, CASE_SENSITIVE, rl[1].vcn, NULL,
- 0, ctx)) {
- ntfs_error(vol->sb, "Failed to find last attribute extent of "
- "mft bitmap attribute.%s", es);
- write_lock_irqsave(&mftbmp_ni->size_lock, flags);
- mftbmp_ni->allocated_size += vol->cluster_size;
- write_unlock_irqrestore(&mftbmp_ni->size_lock, flags);
- ntfs_attr_put_search_ctx(ctx);
- unmap_mft_record(mft_ni);
- up_write(&mftbmp_ni->runlist.lock);
-
- NVolSetErrors(vol);
- return ret;
- }
- a = ctx->attr;
- a->data.non_resident.highest_vcn = cpu_to_sle64(rl[1].vcn - 2);
- undo_alloc:
- if (status.added_cluster) {
-
- rl->length--;
- rl[1].vcn--;
- } else if (status.added_run) {
- lcn = rl->lcn;
-
- rl->lcn = rl[1].lcn;
- rl->length = 0;
- }
-
- down_write(&vol->lcnbmp_lock);
- if (ntfs_bitmap_clear_bit(vol->lcnbmp_ino, lcn)) {
- ntfs_error(vol->sb, "Failed to free allocated cluster.%s", es);
- NVolSetErrors(vol);
- }
- up_write(&vol->lcnbmp_lock);
- if (status.mp_rebuilt) {
- if (ntfs_mapping_pairs_build(vol, (u8*)a + le16_to_cpu(
- a->data.non_resident.mapping_pairs_offset),
- old_alen - le16_to_cpu(
- a->data.non_resident.mapping_pairs_offset),
- rl2, ll, -1, NULL)) {
- ntfs_error(vol->sb, "Failed to restore mapping pairs "
- "array.%s", es);
- NVolSetErrors(vol);
- }
- if (ntfs_attr_record_resize(ctx->mrec, a, old_alen)) {
- ntfs_error(vol->sb, "Failed to restore attribute "
- "record.%s", es);
- NVolSetErrors(vol);
- }
- flush_dcache_mft_record_page(ctx->ntfs_ino);
- mark_mft_record_dirty(ctx->ntfs_ino);
- }
- if (ctx)
- ntfs_attr_put_search_ctx(ctx);
- if (!IS_ERR(mrec))
- unmap_mft_record(mft_ni);
- up_write(&mftbmp_ni->runlist.lock);
- return ret;
- }
- static int ntfs_mft_bitmap_extend_initialized_nolock(ntfs_volume *vol)
- {
- s64 old_data_size, old_initialized_size;
- unsigned long flags;
- struct inode *mftbmp_vi;
- ntfs_inode *mft_ni, *mftbmp_ni;
- ntfs_attr_search_ctx *ctx;
- MFT_RECORD *mrec;
- ATTR_RECORD *a;
- int ret;
- ntfs_debug("Extending mft bitmap initiailized (and data) size.");
- mft_ni = NTFS_I(vol->mft_ino);
- mftbmp_vi = vol->mftbmp_ino;
- mftbmp_ni = NTFS_I(mftbmp_vi);
-
- mrec = map_mft_record(mft_ni);
- if (IS_ERR(mrec)) {
- ntfs_error(vol->sb, "Failed to map mft record.");
- return PTR_ERR(mrec);
- }
- ctx = ntfs_attr_get_search_ctx(mft_ni, mrec);
- if (unlikely(!ctx)) {
- ntfs_error(vol->sb, "Failed to get search context.");
- ret = -ENOMEM;
- goto unm_err_out;
- }
- ret = ntfs_attr_lookup(mftbmp_ni->type, mftbmp_ni->name,
- mftbmp_ni->name_len, CASE_SENSITIVE, 0, NULL, 0, ctx);
- if (unlikely(ret)) {
- ntfs_error(vol->sb, "Failed to find first attribute extent of "
- "mft bitmap attribute.");
- if (ret == -ENOENT)
- ret = -EIO;
- goto put_err_out;
- }
- a = ctx->attr;
- write_lock_irqsave(&mftbmp_ni->size_lock, flags);
- old_data_size = i_size_read(mftbmp_vi);
- old_initialized_size = mftbmp_ni->initialized_size;
-
- mftbmp_ni->initialized_size += 8;
- a->data.non_resident.initialized_size =
- cpu_to_sle64(mftbmp_ni->initialized_size);
- if (mftbmp_ni->initialized_size > old_data_size) {
- i_size_write(mftbmp_vi, mftbmp_ni->initialized_size);
- a->data.non_resident.data_size =
- cpu_to_sle64(mftbmp_ni->initialized_size);
- }
- write_unlock_irqrestore(&mftbmp_ni->size_lock, flags);
-
- flush_dcache_mft_record_page(ctx->ntfs_ino);
- mark_mft_record_dirty(ctx->ntfs_ino);
- ntfs_attr_put_search_ctx(ctx);
- unmap_mft_record(mft_ni);
-
- ret = ntfs_attr_set(mftbmp_ni, old_initialized_size, 8, 0);
- if (likely(!ret)) {
- ntfs_debug("Done. (Wrote eight initialized bytes to mft "
- "bitmap.");
- return 0;
- }
- ntfs_error(vol->sb, "Failed to write to mft bitmap.");
-
- mrec = map_mft_record(mft_ni);
- if (IS_ERR(mrec)) {
- ntfs_error(vol->sb, "Failed to map mft record.%s", es);
- NVolSetErrors(vol);
- return ret;
- }
- ctx = ntfs_attr_get_search_ctx(mft_ni, mrec);
- if (unlikely(!ctx)) {
- ntfs_error(vol->sb, "Failed to get search context.%s", es);
- NVolSetErrors(vol);
- goto unm_err_out;
- }
- if (ntfs_attr_lookup(mftbmp_ni->type, mftbmp_ni->name,
- mftbmp_ni->name_len, CASE_SENSITIVE, 0, NULL, 0, ctx)) {
- ntfs_error(vol->sb, "Failed to find first attribute extent of "
- "mft bitmap attribute.%s", es);
- NVolSetErrors(vol);
- put_err_out:
- ntfs_attr_put_search_ctx(ctx);
- unm_err_out:
- unmap_mft_record(mft_ni);
- goto err_out;
- }
- a = ctx->attr;
- write_lock_irqsave(&mftbmp_ni->size_lock, flags);
- mftbmp_ni->initialized_size = old_initialized_size;
- a->data.non_resident.initialized_size =
- cpu_to_sle64(old_initialized_size);
- if (i_size_read(mftbmp_vi) != old_data_size) {
- i_size_write(mftbmp_vi, old_data_size);
- a->data.non_resident.data_size = cpu_to_sle64(old_data_size);
- }
- write_unlock_irqrestore(&mftbmp_ni->size_lock, flags);
- flush_dcache_mft_record_page(ctx->ntfs_ino);
- mark_mft_record_dirty(ctx->ntfs_ino);
- ntfs_attr_put_search_ctx(ctx);
- unmap_mft_record(mft_ni);
- #ifdef DEBUG
- read_lock_irqsave(&mftbmp_ni->size_lock, flags);
- ntfs_debug("Restored status of mftbmp: allocated_size 0x%llx, "
- "data_size 0x%llx, initialized_size 0x%llx.",
- (long long)mftbmp_ni->allocated_size,
- (long long)i_size_read(mftbmp_vi),
- (long long)mftbmp_ni->initialized_size);
- read_unlock_irqrestore(&mftbmp_ni->size_lock, flags);
- #endif
- err_out:
- return ret;
- }
- static int ntfs_mft_data_extend_allocation_nolock(ntfs_volume *vol)
- {
- LCN lcn;
- VCN old_last_vcn;
- s64 min_nr, nr, ll;
- unsigned long flags;
- ntfs_inode *mft_ni;
- runlist_element *rl, *rl2;
- ntfs_attr_search_ctx *ctx = NULL;
- MFT_RECORD *mrec;
- ATTR_RECORD *a = NULL;
- int ret, mp_size;
- u32 old_alen = 0;
- bool mp_rebuilt = false;
- ntfs_debug("Extending mft data allocation.");
- mft_ni = NTFS_I(vol->mft_ino);
-
- down_write(&mft_ni->runlist.lock);
- read_lock_irqsave(&mft_ni->size_lock, flags);
- ll = mft_ni->allocated_size;
- read_unlock_irqrestore(&mft_ni->size_lock, flags);
- rl = ntfs_attr_find_vcn_nolock(mft_ni,
- (ll - 1) >> vol->cluster_size_bits, NULL);
- if (unlikely(IS_ERR(rl) || !rl->length || rl->lcn < 0)) {
- up_write(&mft_ni->runlist.lock);
- ntfs_error(vol->sb, "Failed to determine last allocated "
- "cluster of mft data attribute.");
- if (!IS_ERR(rl))
- ret = -EIO;
- else
- ret = PTR_ERR(rl);
- return ret;
- }
- lcn = rl->lcn + rl->length;
- ntfs_debug("Last lcn of mft data attribute is 0x%llx.", (long long)lcn);
-
- min_nr = vol->mft_record_size >> vol->cluster_size_bits;
- if (!min_nr)
- min_nr = 1;
-
- nr = vol->mft_record_size << 4 >> vol->cluster_size_bits;
- if (!nr)
- nr = min_nr;
-
- read_lock_irqsave(&mft_ni->size_lock, flags);
- ll = mft_ni->allocated_size;
- read_unlock_irqrestore(&mft_ni->size_lock, flags);
- if (unlikely((ll + (nr << vol->cluster_size_bits)) >>
- vol->mft_record_size_bits >= (1ll << 32))) {
- nr = min_nr;
- if (unlikely((ll + (nr << vol->cluster_size_bits)) >>
- vol->mft_record_size_bits >= (1ll << 32))) {
- ntfs_warning(vol->sb, "Cannot allocate mft record "
- "because the maximum number of inodes "
- "(2^32) has already been reached.");
- up_write(&mft_ni->runlist.lock);
- return -ENOSPC;
- }
- }
- ntfs_debug("Trying mft data allocation with %s cluster count %lli.",
- nr > min_nr ? "default" : "minimal", (long long)nr);
- old_last_vcn = rl[1].vcn;
- do {
- rl2 = ntfs_cluster_alloc(vol, old_last_vcn, nr, lcn, MFT_ZONE,
- true);
- if (likely(!IS_ERR(rl2)))
- break;
- if (PTR_ERR(rl2) != -ENOSPC || nr == min_nr) {
- ntfs_error(vol->sb, "Failed to allocate the minimal "
- "number of clusters (%lli) for the "
- "mft data attribute.", (long long)nr);
- up_write(&mft_ni->runlist.lock);
- return PTR_ERR(rl2);
- }
-
- nr = min_nr;
- ntfs_debug("Retrying mft data allocation with minimal cluster "
- "count %lli.", (long long)nr);
- } while (1);
- rl = ntfs_runlists_merge(mft_ni->runlist.rl, rl2);
- if (IS_ERR(rl)) {
- up_write(&mft_ni->runlist.lock);
- ntfs_error(vol->sb, "Failed to merge runlists for mft data "
- "attribute.");
- if (ntfs_cluster_free_from_rl(vol, rl2)) {
- ntfs_error(vol->sb, "Failed to deallocate clusters "
- "from the mft data attribute.%s", es);
- NVolSetErrors(vol);
- }
- ntfs_free(rl2);
- return PTR_ERR(rl);
- }
- mft_ni->runlist.rl = rl;
- ntfs_debug("Allocated %lli clusters.", (long long)nr);
-
- for (; rl[1].length; rl++)
- ;
-
- mrec = map_mft_record(mft_ni);
- if (IS_ERR(mrec)) {
- ntfs_error(vol->sb, "Failed to map mft record.");
- ret = PTR_ERR(mrec);
- goto undo_alloc;
- }
- ctx = ntfs_attr_get_search_ctx(mft_ni, mrec);
- if (unlikely(!ctx)) {
- ntfs_error(vol->sb, "Failed to get search context.");
- ret = -ENOMEM;
- goto undo_alloc;
- }
- ret = ntfs_attr_lookup(mft_ni->type, mft_ni->name, mft_ni->name_len,
- CASE_SENSITIVE, rl[1].vcn, NULL, 0, ctx);
- if (unlikely(ret)) {
- ntfs_error(vol->sb, "Failed to find last attribute extent of "
- "mft data attribute.");
- if (ret == -ENOENT)
- ret = -EIO;
- goto undo_alloc;
- }
- a = ctx->attr;
- ll = sle64_to_cpu(a->data.non_resident.lowest_vcn);
-
- for (rl2 = rl; rl2 > mft_ni->runlist.rl; rl2--) {
- if (ll >= rl2->vcn)
- break;
- }
- BUG_ON(ll < rl2->vcn);
- BUG_ON(ll >= rl2->vcn + rl2->length);
-
- mp_size = ntfs_get_size_for_mapping_pairs(vol, rl2, ll, -1);
- if (unlikely(mp_size <= 0)) {
- ntfs_error(vol->sb, "Get size for mapping pairs failed for "
- "mft data attribute extent.");
- ret = mp_size;
- if (!ret)
- ret = -EIO;
- goto undo_alloc;
- }
-
- old_alen = le32_to_cpu(a->length);
- ret = ntfs_attr_record_resize(ctx->mrec, a, mp_size +
- le16_to_cpu(a->data.non_resident.mapping_pairs_offset));
- if (unlikely(ret)) {
- if (ret != -ENOSPC) {
- ntfs_error(vol->sb, "Failed to resize attribute "
- "record for mft data attribute.");
- goto undo_alloc;
- }
-
-
-
-
-
-
-
-
-
-
- ntfs_error(vol->sb, "Not enough space in this mft record to "
- "accommodate extended mft data attribute "
- "extent. Cannot handle this yet.");
- ret = -EOPNOTSUPP;
- goto undo_alloc;
- }
- mp_rebuilt = true;
-
- ret = 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(ret)) {
- ntfs_error(vol->sb, "Failed to build mapping pairs array of "
- "mft data attribute.");
- goto undo_alloc;
- }
-
- a->data.non_resident.highest_vcn = cpu_to_sle64(rl[1].vcn - 1);
-
- if (a->data.non_resident.lowest_vcn) {
-
- flush_dcache_mft_record_page(ctx->ntfs_ino);
- mark_mft_record_dirty(ctx->ntfs_ino);
- ntfs_attr_reinit_search_ctx(ctx);
- ret = ntfs_attr_lookup(mft_ni->type, mft_ni->name,
- mft_ni->name_len, CASE_SENSITIVE, 0, NULL, 0,
- ctx);
- if (unlikely(ret)) {
- ntfs_error(vol->sb, "Failed to find first attribute "
- "extent of mft data attribute.");
- goto restore_undo_alloc;
- }
- a = ctx->attr;
- }
- write_lock_irqsave(&mft_ni->size_lock, flags);
- mft_ni->allocated_size += nr << vol->cluster_size_bits;
- a->data.non_resident.allocated_size =
- cpu_to_sle64(mft_ni->allocated_size);
- write_unlock_irqrestore(&mft_ni->size_lock, flags);
-
- flush_dcache_mft_record_page(ctx->ntfs_ino);
- mark_mft_record_dirty(ctx->ntfs_ino);
- ntfs_attr_put_search_ctx(ctx);
- unmap_mft_record(mft_ni);
- up_write(&mft_ni->runlist.lock);
- ntfs_debug("Done.");
- return 0;
- restore_undo_alloc:
- ntfs_attr_reinit_search_ctx(ctx);
- if (ntfs_attr_lookup(mft_ni->type, mft_ni->name, mft_ni->name_len,
- CASE_SENSITIVE, rl[1].vcn, NULL, 0, ctx)) {
- ntfs_error(vol->sb, "Failed to find last attribute extent of "
- "mft data attribute.%s", es);
- write_lock_irqsave(&mft_ni->size_lock, flags);
- mft_ni->allocated_size += nr << vol->cluster_size_bits;
- write_unlock_irqrestore(&mft_ni->size_lock, flags);
- ntfs_attr_put_search_ctx(ctx);
- unmap_mft_record(mft_ni);
- up_write(&mft_ni->runlist.lock);
-
- NVolSetErrors(vol);
- return ret;
- }
- ctx->attr->data.non_resident.highest_vcn =
- cpu_to_sle64(old_last_vcn - 1);
- undo_alloc:
- if (ntfs_cluster_free(mft_ni, old_last_vcn, -1, ctx) < 0) {
- ntfs_error(vol->sb, "Failed to free clusters from mft data "
- "attribute.%s", es);
- NVolSetErrors(vol);
- }
- a = ctx->attr;
- if (ntfs_rl_truncate_nolock(vol, &mft_ni->runlist, old_last_vcn)) {
- ntfs_error(vol->sb, "Failed to truncate mft data attribute "
- "runlist.%s", es);
- NVolSetErrors(vol);
- }
- if (mp_rebuilt && !IS_ERR(ctx->mrec)) {
- if (ntfs_mapping_pairs_build(vol, (u8*)a + le16_to_cpu(
- a->data.non_resident.mapping_pairs_offset),
- old_alen - le16_to_cpu(
- a->data.non_resident.mapping_pairs_offset),
- rl2, ll, -1, NULL)) {
- ntfs_error(vol->sb, "Failed to restore mapping pairs "
- "array.%s", es);
- NVolSetErrors(vol);
- }
- if (ntfs_attr_record_resize(ctx->mrec, a, old_alen)) {
- ntfs_error(vol->sb, "Failed to restore attribute "
- "record.%s", es);
- NVolSetErrors(vol);
- }
- flush_dcache_mft_record_page(ctx->ntfs_ino);
- mark_mft_record_dirty(ctx->ntfs_ino);
- } else if (IS_ERR(ctx->mrec)) {
- ntfs_error(vol->sb, "Failed to restore attribute search "
- "context.%s", es);
- NVolSetErrors(vol);
- }
- if (ctx)
- ntfs_attr_put_search_ctx(ctx);
- if (!IS_ERR(mrec))
- unmap_mft_record(mft_ni);
- up_write(&mft_ni->runlist.lock);
- return ret;
- }
- static int ntfs_mft_record_layout(const ntfs_volume *vol, const s64 mft_no,
- MFT_RECORD *m)
- {
- ATTR_RECORD *a;
- ntfs_debug("Entering for mft record 0x%llx.", (long long)mft_no);
- if (mft_no >= (1ll << 32)) {
- ntfs_error(vol->sb, "Mft record number 0x%llx exceeds "
- "maximum of 2^32.", (long long)mft_no);
- return -ERANGE;
- }
-
- memset(m, 0, vol->mft_record_size);
-
- if (vol->major_ver < 3 || (vol->major_ver == 3 && !vol->minor_ver))
- m->usa_ofs = cpu_to_le16((sizeof(MFT_RECORD_OLD) + 1) & ~1);
- else {
- m->usa_ofs = cpu_to_le16((sizeof(MFT_RECORD) + 1) & ~1);
-
- m->reserved = 0;
- m->mft_record_number = cpu_to_le32((u32)mft_no);
- }
- m->magic = magic_FILE;
- if (vol->mft_record_size >= NTFS_BLOCK_SIZE)
- m->usa_count = cpu_to_le16(vol->mft_record_size /
- NTFS_BLOCK_SIZE + 1);
- else {
- m->usa_count = cpu_to_le16(1);
- ntfs_warning(vol->sb, "Sector size is bigger than mft record "
- "size. Setting usa_count to 1. If chkdsk "
- "reports this as corruption, please email "
- "linux-ntfs-dev@lists.sourceforge.net stating "
- "that you saw this message and that the "
- "modified filesystem created was corrupt. "
- "Thank you.");
- }
-
- *(le16*)((u8*)m + le16_to_cpu(m->usa_ofs)) = cpu_to_le16(1);
- m->lsn = 0;
- m->sequence_number = cpu_to_le16(1);
- m->link_count = 0;
-
- m->attrs_offset = cpu_to_le16((le16_to_cpu(m->usa_ofs) +
- (le16_to_cpu(m->usa_count) << 1) + 7) & ~7);
- m->flags = 0;
-
- m->bytes_in_use = cpu_to_le32(le16_to_cpu(m->attrs_offset) + 8);
- m->bytes_allocated = cpu_to_le32(vol->mft_record_size);
- m->base_mft_record = 0;
- m->next_attr_instance = 0;
-
- a = (ATTR_RECORD*)((u8*)m + le16_to_cpu(m->attrs_offset));
- a->type = AT_END;
- a->length = 0;
- ntfs_debug("Done.");
- return 0;
- }
- static int ntfs_mft_record_format(const ntfs_volume *vol, const s64 mft_no)
- {
- loff_t i_size;
- struct inode *mft_vi = vol->mft_ino;
- struct page *page;
- MFT_RECORD *m;
- pgoff_t index, end_index;
- unsigned int ofs;
- int err;
- ntfs_debug("Entering for mft record 0x%llx.", (long long)mft_no);
-
- index = mft_no << vol->mft_record_size_bits >> PAGE_SHIFT;
- ofs = (mft_no << vol->mft_record_size_bits) & ~PAGE_MASK;
-
- i_size = i_size_read(mft_vi);
- end_index = i_size >> PAGE_SHIFT;
- if (unlikely(index >= end_index)) {
- if (unlikely(index > end_index || ofs + vol->mft_record_size >=
- (i_size & ~PAGE_MASK))) {
- ntfs_error(vol->sb, "Tried to format non-existing mft "
- "record 0x%llx.", (long long)mft_no);
- return -ENOENT;
- }
- }
-
- page = ntfs_map_page(mft_vi->i_mapping, index);
- if (IS_ERR(page)) {
- ntfs_error(vol->sb, "Failed to map page containing mft record "
- "to format 0x%llx.", (long long)mft_no);
- return PTR_ERR(page);
- }
- lock_page(page);
- BUG_ON(!PageUptodate(page));
- ClearPageUptodate(page);
- m = (MFT_RECORD*)((u8*)page_address(page) + ofs);
- err = ntfs_mft_record_layout(vol, mft_no, m);
- if (unlikely(err)) {
- ntfs_error(vol->sb, "Failed to layout mft record 0x%llx.",
- (long long)mft_no);
- SetPageUptodate(page);
- unlock_page(page);
- ntfs_unmap_page(page);
- return err;
- }
- flush_dcache_page(page);
- SetPageUptodate(page);
- unlock_page(page);
-
- mark_ntfs_record_dirty(page, ofs);
- ntfs_unmap_page(page);
- ntfs_debug("Done.");
- return 0;
- }
- ntfs_inode *ntfs_mft_record_alloc(ntfs_volume *vol, const int mode,
- ntfs_inode *base_ni, MFT_RECORD **mrec)
- {
- s64 ll, bit, old_data_initialized, old_data_size;
- unsigned long flags;
- struct inode *vi;
- struct page *page;
- ntfs_inode *mft_ni, *mftbmp_ni, *ni;
- ntfs_attr_search_ctx *ctx;
- MFT_RECORD *m;
- ATTR_RECORD *a;
- pgoff_t index;
- unsigned int ofs;
- int err;
- le16 seq_no, usn;
- bool record_formatted = false;
- if (base_ni) {
- ntfs_debug("Entering (allocating an extent mft record for "
- "base mft record 0x%llx).",
- (long long)base_ni->mft_no);
-
- BUG_ON(mode);
- } else
- ntfs_debug("Entering (allocating a base mft record).");
- if (mode) {
-
- BUG_ON(base_ni);
-
- if (!S_ISREG(mode) && !S_ISDIR(mode))
- return ERR_PTR(-EOPNOTSUPP);
- }
- BUG_ON(!mrec);
- mft_ni = NTFS_I(vol->mft_ino);
- mftbmp_ni = NTFS_I(vol->mftbmp_ino);
- down_write(&vol->mftbmp_lock);
- bit = ntfs_mft_bitmap_find_and_alloc_free_rec_nolock(vol, base_ni);
- if (bit >= 0) {
- ntfs_debug("Found and allocated free record (#1), bit 0x%llx.",
- (long long)bit);
- goto have_alloc_rec;
- }
- if (bit != -ENOSPC) {
- up_write(&vol->mftbmp_lock);
- return ERR_PTR(bit);
- }
-
- read_lock_irqsave(&mft_ni->size_lock, flags);
- ll = mft_ni->initialized_size >> vol->mft_record_size_bits;
- read_unlock_irqrestore(&mft_ni->size_lock, flags);
- read_lock_irqsave(&mftbmp_ni->size_lock, flags);
- old_data_initialized = mftbmp_ni->initialized_size;
- read_unlock_irqrestore(&mftbmp_ni->size_lock, flags);
- if (old_data_initialized << 3 > ll && old_data_initialized > 3) {
- bit = ll;
- if (bit < 24)
- bit = 24;
- if (unlikely(bit >= (1ll << 32)))
- goto max_err_out;
- ntfs_debug("Found free record (#2), bit 0x%llx.",
- (long long)bit);
- goto found_free_rec;
- }
-
- bit = old_data_initialized << 3;
- if (unlikely(bit >= (1ll << 32)))
- goto max_err_out;
- read_lock_irqsave(&mftbmp_ni->size_lock, flags);
- old_data_size = mftbmp_ni->allocated_size;
- ntfs_debug("Status of mftbmp before extension: allocated_size 0x%llx, "
- "data_size 0x%llx, initialized_size 0x%llx.",
- (long long)old_data_size,
- (long long)i_size_read(vol->mftbmp_ino),
- (long long)old_data_initialized);
- read_unlock_irqrestore(&mftbmp_ni->size_lock, flags);
- if (old_data_initialized + 8 > old_data_size) {
-
- ntfs_debug("mftbmp: initialized_size + 8 > allocated_size.");
- err = ntfs_mft_bitmap_extend_allocation_nolock(vol);
- if (unlikely(err)) {
- up_write(&vol->mftbmp_lock);
- goto err_out;
- }
- #ifdef DEBUG
- read_lock_irqsave(&mftbmp_ni->size_lock, flags);
- ntfs_debug("Status of mftbmp after allocation extension: "
- "allocated_size 0x%llx, data_size 0x%llx, "
- "initialized_size 0x%llx.",
- (long long)mftbmp_ni->allocated_size,
- (long long)i_size_read(vol->mftbmp_ino),
- (long long)mftbmp_ni->initialized_size);
- read_unlock_irqrestore(&mftbmp_ni->size_lock, flags);
- #endif
- }
-
- err = ntfs_mft_bitmap_extend_initialized_nolock(vol);
- if (unlikely(err)) {
- up_write(&vol->mftbmp_lock);
- goto err_out;
- }
- #ifdef DEBUG
- read_lock_irqsave(&mftbmp_ni->size_lock, flags);
- ntfs_debug("Status of mftbmp after initialized extension: "
- "allocated_size 0x%llx, data_size 0x%llx, "
- "initialized_size 0x%llx.",
- (long long)mftbmp_ni->allocated_size,
- (long long)i_size_read(vol->mftbmp_ino),
- (long long)mftbmp_ni->initialized_size);
- read_unlock_irqrestore(&mftbmp_ni->size_lock, flags);
- #endif
- ntfs_debug("Found free record (#3), bit 0x%llx.", (long long)bit);
- found_free_rec:
-
- ntfs_debug("At found_free_rec.");
- err = ntfs_bitmap_set_bit(vol->mftbmp_ino, bit);
- if (unlikely(err)) {
- ntfs_error(vol->sb, "Failed to allocate bit in mft bitmap.");
- up_write(&vol->mftbmp_lock);
- goto err_out;
- }
- ntfs_debug("Set bit 0x%llx in mft bitmap.", (long long)bit);
- have_alloc_rec:
-
- ll = (bit + 1) << vol->mft_record_size_bits;
- read_lock_irqsave(&mft_ni->size_lock, flags);
- old_data_initialized = mft_ni->initialized_size;
- read_unlock_irqrestore(&mft_ni->size_lock, flags);
- if (ll <= old_data_initialized) {
- ntfs_debug("Allocated mft record already initialized.");
- goto mft_rec_already_initialized;
- }
- ntfs_debug("Initializing allocated mft record.");
-
- read_lock_irqsave(&mft_ni->size_lock, flags);
- ntfs_debug("Status of mft data before extension: "
- "allocated_size 0x%llx, data_size 0x%llx, "
- "initialized_size 0x%llx.",
- (long long)mft_ni->allocated_size,
- (long long)i_size_read(vol->mft_ino),
- (long long)mft_ni->initialized_size);
- while (ll > mft_ni->allocated_size) {
- read_unlock_irqrestore(&mft_ni->size_lock, flags);
- err = ntfs_mft_data_extend_allocation_nolock(vol);
- if (unlikely(err)) {
- ntfs_error(vol->sb, "Failed to extend mft data "
- "allocation.");
- goto undo_mftbmp_alloc_nolock;
- }
- read_lock_irqsave(&mft_ni->size_lock, flags);
- ntfs_debug("Status of mft data after allocation extension: "
- "allocated_size 0x%llx, data_size 0x%llx, "
- "initialized_size 0x%llx.",
- (long long)mft_ni->allocated_size,
- (long long)i_size_read(vol->mft_ino),
- (long long)mft_ni->initialized_size);
- }
- read_unlock_irqrestore(&mft_ni->size_lock, flags);
-
- write_lock_irqsave(&mft_ni->size_lock, flags);
- old_data_initialized = mft_ni->initialized_size;
- old_data_size = vol->mft_ino->i_size;
- while (ll > mft_ni->initialized_size) {
- s64 new_initialized_size, mft_no;
-
- new_initialized_size = mft_ni->initialized_size +
- vol->mft_record_size;
- mft_no = mft_ni->initialized_size >> vol->mft_record_size_bits;
- if (new_initialized_size > i_size_read(vol->mft_ino))
- i_size_write(vol->mft_ino, new_initialized_size);
- write_unlock_irqrestore(&mft_ni->size_lock, flags);
- ntfs_debug("Initializing mft record 0x%llx.",
- (long long)mft_no);
- err = ntfs_mft_record_format(vol, mft_no);
- if (unlikely(err)) {
- ntfs_error(vol->sb, "Failed to format mft record.");
- goto undo_data_init;
- }
- write_lock_irqsave(&mft_ni->size_lock, flags);
- mft_ni->initialized_size = new_initialized_size;
- }
- write_unlock_irqrestore(&mft_ni->size_lock, flags);
- record_formatted = true;
-
- m = map_mft_record(mft_ni);
- if (IS_ERR(m)) {
- ntfs_error(vol->sb, "Failed to map mft record.");
- err = PTR_ERR(m);
- goto undo_data_init;
- }
- ctx = ntfs_attr_get_search_ctx(mft_ni, m);
- if (unlikely(!ctx)) {
- ntfs_error(vol->sb, "Failed to get search context.");
- err = -ENOMEM;
- unmap_mft_record(mft_ni);
- goto undo_data_init;
- }
- err = ntfs_attr_lookup(mft_ni->type, mft_ni->name, mft_ni->name_len,
- CASE_SENSITIVE, 0, NULL, 0, ctx);
- if (unlikely(err)) {
- ntfs_error(vol->sb, "Failed to find first attribute extent of "
- "mft data attribute.");
- ntfs_attr_put_search_ctx(ctx);
- unmap_mft_record(mft_ni);
- goto undo_data_init;
- }
- a = ctx->attr;
- read_lock_irqsave(&mft_ni->size_lock, flags);
- a->data.non_resident.initialized_size =
- cpu_to_sle64(mft_ni->initialized_size);
- a->data.non_resident.data_size =
- cpu_to_sle64(i_size_read(vol->mft_ino));
- read_unlock_irqrestore(&mft_ni->size_lock, flags);
-
- flush_dcache_mft_record_page(ctx->ntfs_ino);
- mark_mft_record_dirty(ctx->ntfs_ino);
- ntfs_attr_put_search_ctx(ctx);
- unmap_mft_record(mft_ni);
- read_lock_irqsave(&mft_ni->size_lock, flags);
- ntfs_debug("Status of mft data after mft record initialization: "
- "allocated_size 0x%llx, data_size 0x%llx, "
- "initialized_size 0x%llx.",
- (long long)mft_ni->allocated_size,
- (long long)i_size_read(vol->mft_ino),
- (long long)mft_ni->initialized_size);
- BUG_ON(i_size_read(vol->mft_ino) > mft_ni->allocated_size);
- BUG_ON(mft_ni->initialized_size > i_size_read(vol->mft_ino));
- read_unlock_irqrestore(&mft_ni->size_lock, flags);
- mft_rec_already_initialized:
-
- up_write(&vol->mftbmp_lock);
-
- index = bit << vol->mft_record_size_bits >> PAGE_SHIFT;
- ofs = (bit << vol->mft_record_size_bits) & ~PAGE_MASK;
-
- page = ntfs_map_page(vol->mft_ino->i_mapping, index);
- if (IS_ERR(page)) {
- ntfs_error(vol->sb, "Failed to map page containing allocated "
- "mft record 0x%llx.", (long long)bit);
- err = PTR_ERR(page);
- goto undo_mftbmp_alloc;
- }
- lock_page(page);
- BUG_ON(!PageUptodate(page));
- ClearPageUptodate(page);
- m = (MFT_RECORD*)((u8*)page_address(page) + ofs);
-
- if (!record_formatted) {
-
- if (ntfs_is_file_record(m->magic) &&
- (m->flags & MFT_RECORD_IN_USE)) {
- ntfs_error(vol->sb, "Mft record 0x%llx was marked "
- "free in mft bitmap but is marked "
- "used itself. Corrupt filesystem. "
- "Unmount and run chkdsk.",
- (long long)bit);
- err = -EIO;
- SetPageUptodate(page);
- unlock_page(page);
- ntfs_unmap_page(page);
- NVolSetErrors(vol);
- goto undo_mftbmp_alloc;
- }
-
- seq_no = m->sequence_number;
- usn = *(le16*)((u8*)m + le16_to_cpu(m->usa_ofs));
- err = ntfs_mft_record_layout(vol, bit, m);
- if (unlikely(err)) {
- ntfs_error(vol->sb, "Failed to layout allocated mft "
- "record 0x%llx.", (long long)bit);
- SetPageUptodate(page);
- unlock_page(page);
- ntfs_unmap_page(page);
- goto undo_mftbmp_alloc;
- }
- if (seq_no)
- m->sequence_number = seq_no;
- if (usn && le16_to_cpu(usn) != 0xffff)
- *(le16*)((u8*)m + le16_to_cpu(m->usa_ofs)) = usn;
- }
-
- m->flags |= MFT_RECORD_IN_USE;
- if (S_ISDIR(mode))
- m->flags |= MFT_RECORD_IS_DIRECTORY;
- flush_dcache_page(page);
- SetPageUptodate(page);
- if (base_ni) {
- MFT_RECORD *m_tmp;
-
- m->base_mft_record = MK_LE_MREF(base_ni->mft_no,
- base_ni->seq_no);
-
- m_tmp = map_extent_mft_record(base_ni, bit, &ni);
- if (IS_ERR(m_tmp)) {
- ntfs_error(vol->sb, "Failed to map allocated extent "
- "mft record 0x%llx.", (long long)bit);
- err = PTR_ERR(m_tmp);
-
- m->flags &= cpu_to_le16(
- ~le16_to_cpu(MFT_RECORD_IN_USE));
- flush_dcache_page(page);
-
- mark_ntfs_record_dirty(page, ofs);
- unlock_page(page);
- ntfs_unmap_page(page);
- goto undo_mftbmp_alloc;
- }
- BUG_ON(m != m_tmp);
-
- mark_ntfs_record_dirty(page, ofs);
- unlock_page(page);
-
- ntfs_unmap_page(page);
- } else {
-
- vi = new_inode(vol->sb);
- if (unlikely(!vi)) {
- err = -ENOMEM;
-
- m->flags &= cpu_to_le16(
- ~le16_to_cpu(MFT_RECORD_IN_USE));
- flush_dcache_page(page);
-
- mark_ntfs_record_dirty(page, ofs);
- unlock_page(page);
- ntfs_unmap_page(page);
- goto undo_mftbmp_alloc;
- }
- vi->i_ino = bit;
-
- vi->i_version = 1;
-
- vi->i_uid = vol->uid;
- vi->i_gid = vol->gid;
-
- ntfs_init_big_inode(vi);
- ni = NTFS_I(vi);
-
- if (S_ISDIR(mode)) {
- vi->i_mode = S_IFDIR | S_IRWXUGO;
- vi->i_mode &= ~vol->dmask;
- NInoSetMstProtected(ni);
- ni->type = AT_INDEX_ALLOCATION;
- ni->name = I30;
- ni->name_len = 4;
- ni->itype.index.block_size = 4096;
- ni->itype.index.block_size_bits = ntfs_ffs(4096) - 1;
- ni->itype.index.collation_rule = COLLATION_FILE_NAME;
- if (vol->cluster_size <= ni->itype.index.block_size) {
- ni->itype.index.vcn_size = vol->cluster_size;
- ni->itype.index.vcn_size_bits =
- vol->cluster_size_bits;
- } else {
- ni->itype.index.vcn_size = vol->sector_size;
- ni->itype.index.vcn_size_bits =
- vol->sector_size_bits;
- }
- } else {
- vi->i_mode = S_IFREG | S_IRWXUGO;
- vi->i_mode &= ~vol->fmask;
- ni->type = AT_DATA;
- ni->name = NULL;
- ni->name_len = 0;
- }
- if (IS_RDONLY(vi))
- vi->i_mode &= ~S_IWUGO;
-
- vi->i_atime = vi->i_mtime = vi->i_ctime =
- current_time(vi);
-
- vi->i_size = 0;
- vi->i_blocks = 0;
-
- vi->i_generation = ni->seq_no = le16_to_cpu(m->sequence_number);
-
- atomic_inc(&ni->count);
- mutex_lock(&ni->mrec_lock);
- ni->page = page;
- ni->page_ofs = ofs;
-
- mark_ntfs_record_dirty(page, ofs);
- unlock_page(page);
-
- insert_inode_hash(vi);
-
- vol->mft_data_pos = bit + 1;
- }
-
- ntfs_debug("Returning opened, allocated %sinode 0x%llx.",
- base_ni ? "extent " : "", (long long)bit);
- *mrec = m;
- return ni;
- undo_data_init:
- write_lock_irqsave(&mft_ni->size_lock, flags);
- mft_ni->initialized_size = old_data_initialized;
- i_size_write(vol->mft_ino, old_data_size);
- write_unlock_irqrestore(&mft_ni->size_lock, flags);
- goto undo_mftbmp_alloc_nolock;
- undo_mftbmp_alloc:
- down_write(&vol->mftbmp_lock);
- undo_mftbmp_alloc_nolock:
- if (ntfs_bitmap_clear_bit(vol->mftbmp_ino, bit)) {
- ntfs_error(vol->sb, "Failed to clear bit in mft bitmap.%s", es);
- NVolSetErrors(vol);
- }
- up_write(&vol->mftbmp_lock);
- err_out:
- return ERR_PTR(err);
- max_err_out:
- ntfs_warning(vol->sb, "Cannot allocate mft record because the maximum "
- "number of inodes (2^32) has already been reached.");
- up_write(&vol->mftbmp_lock);
- return ERR_PTR(-ENOSPC);
- }
- int ntfs_extent_mft_record_free(ntfs_inode *ni, MFT_RECORD *m)
- {
- unsigned long mft_no = ni->mft_no;
- ntfs_volume *vol = ni->vol;
- ntfs_inode *base_ni;
- ntfs_inode **extent_nis;
- int i, err;
- le16 old_seq_no;
- u16 seq_no;
-
- BUG_ON(NInoAttr(ni));
- BUG_ON(ni->nr_extents != -1);
- mutex_lock(&ni->extent_lock);
- base_ni = ni->ext.base_ntfs_ino;
- mutex_unlock(&ni->extent_lock);
- BUG_ON(base_ni->nr_extents <= 0);
- ntfs_debug("Entering for extent inode 0x%lx, base inode 0x%lx.\n",
- mft_no, base_ni->mft_no);
- mutex_lock(&base_ni->extent_lock);
-
- if (atomic_read(&ni->count) > 2) {
- ntfs_error(vol->sb, "Tried to free busy extent inode 0x%lx, "
- "not freeing.", base_ni->mft_no);
- mutex_unlock(&base_ni->extent_lock);
- return -EBUSY;
- }
-
- extent_nis = base_ni->ext.extent_ntfs_inos;
- err = -ENOENT;
- for (i = 0; i < base_ni->nr_extents; i++) {
- if (ni != extent_nis[i])
- continue;
- extent_nis += i;
- base_ni->nr_extents--;
- memmove(extent_nis, extent_nis + 1, (base_ni->nr_extents - i) *
- sizeof(ntfs_inode*));
- err = 0;
- break;
- }
- mutex_unlock(&base_ni->extent_lock);
- if (unlikely(err)) {
- ntfs_error(vol->sb, "Extent inode 0x%lx is not attached to "
- "its base inode 0x%lx.", mft_no,
- base_ni->mft_no);
- BUG();
- }
-
-
- m->flags &= ~MFT_RECORD_IN_USE;
-
- old_seq_no = m->sequence_number;
- seq_no = le16_to_cpu(old_seq_no);
- if (seq_no == 0xffff)
- seq_no = 1;
- else if (seq_no)
- seq_no++;
- m->sequence_number = cpu_to_le16(seq_no);
-
- NInoSetDirty(ni);
- err = write_mft_record(ni, m, 0);
- if (unlikely(err)) {
- ntfs_error(vol->sb, "Failed to write mft record 0x%lx, not "
- "freeing.", mft_no);
- goto rollback;
- }
- rollback_error:
-
- unmap_extent_mft_record(ni);
- ntfs_clear_extent_inode(ni);
-
- down_write(&vol->mftbmp_lock);
- err = ntfs_bitmap_clear_bit(vol->mftbmp_ino, mft_no);
- up_write(&vol->mftbmp_lock);
- if (unlikely(err)) {
-
- ntfs_error(vol->sb, "Failed to clear bit in mft bitmap.%s", es);
- NVolSetErrors(vol);
- }
- return 0;
- rollback:
-
- mutex_lock(&base_ni->extent_lock);
- extent_nis = base_ni->ext.extent_ntfs_inos;
- if (!(base_ni->nr_extents & 3)) {
- int new_size = (base_ni->nr_extents + 4) * sizeof(ntfs_inode*);
- extent_nis = kmalloc(new_size, GFP_NOFS);
- if (unlikely(!extent_nis)) {
- ntfs_error(vol->sb, "Failed to allocate internal "
- "buffer during rollback.%s", es);
- mutex_unlock(&base_ni->extent_lock);
- NVolSetErrors(vol);
- goto rollback_error;
- }
- if (base_ni->nr_extents) {
- BUG_ON(!base_ni->ext.extent_ntfs_inos);
- memcpy(extent_nis, base_ni->ext.extent_ntfs_inos,
- new_size - 4 * sizeof(ntfs_inode*));
- kfree(base_ni->ext.extent_ntfs_inos);
- }
- base_ni->ext.extent_ntfs_inos = extent_nis;
- }
- m->flags |= MFT_RECORD_IN_USE;
- m->sequence_number = old_seq_no;
- extent_nis[base_ni->nr_extents++] = ni;
- mutex_unlock(&base_ni->extent_lock);
- mark_mft_record_dirty(ni);
- return err;
- }
- #endif
|