if (ni->name_len != na->name_len)
return 0;
if (na->name_len && memcmp(ni->name, na->name,
- na->name_len * sizeof(uchar_t)))
+ na->name_len * sizeof(ntfschar)))
return 0;
}
/* Match! */
if (na->name && na->name_len && na->name != I30) {
unsigned int i;
- i = na->name_len * sizeof(uchar_t);
- ni->name = (uchar_t*)kmalloc(i + sizeof(uchar_t), GFP_ATOMIC);
+ i = na->name_len * sizeof(ntfschar);
+ ni->name = (ntfschar*)kmalloc(i + sizeof(ntfschar), GFP_ATOMIC);
if (!ni->name)
return -ENOMEM;
memcpy(ni->name, na->name, i);
typedef int (*set_t)(struct inode *, void *);
static int ntfs_read_locked_inode(struct inode *vi);
static int ntfs_read_locked_attr_inode(struct inode *base_vi, struct inode *vi);
+static int ntfs_read_locked_index_inode(struct inode *base_vi,
+ struct inode *vi);
/**
* ntfs_iget - obtain a struct inode corresponding to a specific normal inode
* initialized, and finally ntfs_read_locked_attr_inode() is called to read the
* attribute and fill in the inode structure.
*
+ * Note, for index allocation attributes, you need to use ntfs_index_iget()
+ * instead of ntfs_attr_iget() as working with indices is a lot more complex.
+ *
* Return the struct inode of the attribute inode on success. Check the return
* value with IS_ERR() and if true, the function failed and the error code is
* obtained from PTR_ERR().
*/
struct inode *ntfs_attr_iget(struct inode *base_vi, ATTR_TYPES type,
- uchar_t *name, u32 name_len)
+ ntfschar *name, u32 name_len)
{
struct inode *vi;
ntfs_attr na;
int err;
+ /* Make sure no one calls ntfs_attr_iget() for indices. */
+ BUG_ON(type == AT_INDEX_ALLOCATION);
+
na.mft_no = base_vi->i_ino;
na.type = type;
na.name = name;
return vi;
}
+/**
+ * ntfs_index_iget - obtain a struct inode corresponding to an index
+ * @base_vi: vfs base inode containing the index related attributes
+ * @name: Unicode name of the index
+ * @name_len: length of @name in Unicode characters
+ *
+ * Obtain the (fake) struct inode corresponding to the index specified by @name
+ * and @name_len, which is present in the base mft record specified by the vfs
+ * inode @base_vi.
+ *
+ * If the index inode is in the cache, it is just returned with an increased
+ * reference count. Otherwise, a new struct inode is allocated and
+ * initialized, and finally ntfs_read_locked_index_inode() is called to read
+ * the index related attributes and fill in the inode structure.
+ *
+ * Return the struct inode of the index inode on success. Check the return
+ * value with IS_ERR() and if true, the function failed and the error code is
+ * obtained from PTR_ERR().
+ */
+struct inode *ntfs_index_iget(struct inode *base_vi, ntfschar *name,
+ u32 name_len)
+{
+ struct inode *vi;
+ ntfs_attr na;
+ int err;
+
+ na.mft_no = base_vi->i_ino;
+ na.type = AT_INDEX_ALLOCATION;
+ na.name = name;
+ na.name_len = name_len;
+
+ vi = iget5_locked(base_vi->i_sb, na.mft_no, (test_t)ntfs_test_inode,
+ (set_t)ntfs_init_locked_inode, &na);
+ if (!vi)
+ return ERR_PTR(-ENOMEM);
+
+ err = 0;
+
+ /* If this is a freshly allocated inode, need to read it now. */
+ if (vi->i_state & I_NEW) {
+ err = ntfs_read_locked_index_inode(base_vi, vi);
+ unlock_new_inode(vi);
+ }
+ /*
+ * There is no point in keeping bad index inodes around. This also
+ * simplifies things in that we never need to check for bad index
+ * inodes elsewhere.
+ */
+ if (err) {
+ iput(vi);
+ vi = ERR_PTR(err);
+ }
+ return vi;
+}
+
struct inode *ntfs_alloc_big_inode(struct super_block *sb)
{
ntfs_inode *ni;
ni->itype.index.bmp_ino = NULL;
ni->itype.index.block_size = 0;
ni->itype.index.vcn_size = 0;
+ ni->itype.index.collation_rule = 0;
ni->itype.index.block_size_bits = 0;
ni->itype.index.vcn_size_bits = 0;
init_MUTEX(&ni->extent_lock);
*
* The only fields in @vi that we need to/can look at when the function is
* called are i_sb, pointing to the mounted device's super block, and i_ino,
- * the number of the inode to load. If this is a fake inode, i.e. NInoAttr(),
- * then the fields type, name, and name_len are also valid, and describe the
- * attribute which this fake inode represents.
+ * the number of the inode to load.
*
* ntfs_read_locked_inode() maps, pins and locks the mft record number i_ino
* for reading and sets up the necessary @vi fields as well as initializing
* Q: What locks are held when the function is called?
* A: i_state has I_LOCK set, hence the inode is locked, also
* i_count is set to 1, so it is not going to go away
- * i_flags is set to 0 and we have no business touching it. Only an ioctl()
+ * i_flags is set to 0 and we have no business touching it. Only an ioctl()
* is allowed to write to them. We should of course be honouring them but
* we need to do that using the IS_* macros defined in include/linux/fs.h.
* In any case ntfs_read_locked_inode() has nothing to do with i_flags.
*
- * Return 0 on success and -errno on error. In the error case, the inode will
+ * Return 0 on success and -errno on error. In the error case, the inode will
* have had make_bad_inode() executed on it.
*/
static int ntfs_read_locked_inode(struct inode *vi)
"COLLATION_FILE_NAME. Not allowed.");
goto unm_err_out;
}
+ ni->itype.index.collation_rule = ir->collation_rule;
ni->itype.index.block_size = le32_to_cpu(ir->index_block_size);
if (ni->itype.index.block_size &
(ni->itype.index.block_size - 1)) {
/* Setup the operations for this inode. */
vi->i_op = &ntfs_dir_inode_ops;
vi->i_fop = &ntfs_dir_ops;
- vi->i_mapping->a_ops = &ntfs_aops;
+ vi->i_mapping->a_ops = &ntfs_mst_aops;
} else {
/* It is a file. */
reinit_attr_search_ctx(ctx);
* @base_vi: base inode
* @vi: attribute inode to read
*
- * ntfs_read_locked_attr_inode() is called from the ntfs_attr_iget() to read
- * the attribute inode described by @vi into memory from the base mft record
+ * ntfs_read_locked_attr_inode() is called from ntfs_attr_iget() to read the
+ * attribute inode described by @vi into memory from the base mft record
* described by @base_ni.
*
* ntfs_read_locked_attr_inode() maps, pins and locks the base inode for
* Q: What locks are held when the function is called?
* A: i_state has I_LOCK set, hence the inode is locked, also
* i_count is set to 1, so it is not going to go away
+ *
+ * Return 0 on success and -errno on error. In the error case, the inode will
+ * have had make_bad_inode() executed on it.
*/
static int ntfs_read_locked_attr_inode(struct inode *base_vi, struct inode *vi)
{
}
/* Find the attribute. */
- if (!lookup_attr(ni->type, ni->name, ni->name_len, IGNORE_CASE, 0,
+ if (!lookup_attr(ni->type, ni->name, ni->name_len, CASE_SENSITIVE, 0,
NULL, 0, ctx))
goto unm_err_out;
/* Setup the operations for this attribute inode. */
vi->i_op = NULL;
vi->i_fop = NULL;
- vi->i_mapping->a_ops = &ntfs_aops;
+ if (NInoMstProtected(ni))
+ vi->i_mapping->a_ops = &ntfs_mst_aops;
+ else
+ vi->i_mapping->a_ops = &ntfs_aops;
if (!NInoCompressed(ni))
vi->i_blocks = ni->allocated_size >> 9;
return err;
}
+/**
+ * ntfs_read_locked_index_inode - read an index inode from its base inode
+ * @base_vi: base inode
+ * @vi: index inode to read
+ *
+ * ntfs_read_locked_index_inode() is called from ntfs_index_iget() to read the
+ * index inode described by @vi into memory from the base mft record described
+ * by @base_ni.
+ *
+ * ntfs_read_locked_index_inode() maps, pins and locks the base inode for
+ * reading and looks up the attributes relating to the index described by @vi
+ * before setting up the necessary fields in @vi as well as initializing the
+ * ntfs inode.
+ *
+ * Note, index inodes are essentially attribute inodes (NInoAttr() is true)
+ * with the attribute type set to AT_INDEX_ALLOCATION. Apart from that, they
+ * are setup like directory inodes since directories are a special case of
+ * indices ao they need to be treated in much the same way. Most importantly,
+ * for small indices the index allocation attribute might not actually exist.
+ * However, the index root attribute always exists but this does not need to
+ * have an inode associated with it and this is why we define a new inode type
+ * index. Also, like for directories, we need to have an attribute inode for
+ * the bitmap attribute corresponding to the index allocation attribute and we
+ * can store this in the appropriate field of the inode, just like we do for
+ * normal directory inodes.
+ *
+ * Q: What locks are held when the function is called?
+ * A: i_state has I_LOCK set, hence the inode is locked, also
+ * i_count is set to 1, so it is not going to go away
+ *
+ * Return 0 on success and -errno on error. In the error case, the inode will
+ * have had make_bad_inode() executed on it.
+ */
+static int ntfs_read_locked_index_inode(struct inode *base_vi, struct inode *vi)
+{
+ ntfs_volume *vol = NTFS_SB(vi->i_sb);
+ ntfs_inode *ni, *base_ni, *bni;
+ struct inode *bvi;
+ MFT_RECORD *m;
+ attr_search_context *ctx;
+ INDEX_ROOT *ir;
+ u8 *ir_end, *index_end;
+ int err = 0;
+
+ ntfs_debug("Entering for i_ino 0x%lx.", vi->i_ino);
+ ntfs_init_big_inode(vi);
+ ni = NTFS_I(vi);
+ base_ni = NTFS_I(base_vi);
+ /* Just mirror the values from the base inode. */
+ vi->i_blksize = base_vi->i_blksize;
+ vi->i_version = base_vi->i_version;
+ vi->i_uid = base_vi->i_uid;
+ vi->i_gid = base_vi->i_gid;
+ vi->i_nlink = base_vi->i_nlink;
+ vi->i_mtime = base_vi->i_mtime;
+ vi->i_ctime = base_vi->i_ctime;
+ vi->i_atime = base_vi->i_atime;
+ vi->i_generation = ni->seq_no = base_ni->seq_no;
+ /* Set inode type to zero but preserve permissions. */
+ vi->i_mode = base_vi->i_mode & ~S_IFMT;
+ /* Map the mft record for the base inode. */
+ m = map_mft_record(base_ni);
+ if (IS_ERR(m)) {
+ err = PTR_ERR(m);
+ goto err_out;
+ }
+ ctx = get_attr_search_ctx(base_ni, m);
+ if (!ctx) {
+ err = -ENOMEM;
+ goto unm_err_out;
+ }
+ /* Find the index root attribute. */
+ if (!lookup_attr(AT_INDEX_ROOT, ni->name, ni->name_len, CASE_SENSITIVE,
+ 0, NULL, 0, ctx)) {
+ ntfs_error(vi->i_sb, "$INDEX_ROOT attribute is missing.");
+ goto unm_err_out;
+ }
+ /* Set up the state. */
+ if (ctx->attr->non_resident) {
+ ntfs_error(vi->i_sb, "$INDEX_ROOT attribute is not resident. "
+ "Not allowed.");
+ goto unm_err_out;
+ }
+ /* Compressed/encrypted/sparse index root is not allowed. */
+ if (ctx->attr->flags & (ATTR_COMPRESSION_MASK | ATTR_IS_ENCRYPTED |
+ ATTR_IS_SPARSE)) {
+ ntfs_error(vi->i_sb, "Found compressed/encrypted/sparse index "
+ "root attribute. Not allowed.");
+ goto unm_err_out;
+ }
+ ir = (INDEX_ROOT*)((u8*)ctx->attr +
+ le16_to_cpu(ctx->attr->data.resident.value_offset));
+ ir_end = (u8*)ir + le32_to_cpu(ctx->attr->data.resident.value_length);
+ if (ir_end > (u8*)ctx->mrec + vol->mft_record_size) {
+ ntfs_error(vi->i_sb, "$INDEX_ROOT attribute is corrupt.");
+ goto unm_err_out;
+ }
+ index_end = (u8*)&ir->index + le32_to_cpu(ir->index.index_length);
+ if (index_end > ir_end) {
+ ntfs_error(vi->i_sb, "Index is corrupt.");
+ goto unm_err_out;
+ }
+ if (ir->type) {
+ ntfs_error(vi->i_sb, "Index type is not 0 (type is 0x%x). "
+ "Not allowed.", le32_to_cpu(ir->type));
+ goto unm_err_out;
+ }
+ ni->itype.index.collation_rule = ir->collation_rule;
+ ntfs_debug("Index collation rule is 0x%x.",
+ le32_to_cpu(ir->collation_rule));
+ ni->itype.index.block_size = le32_to_cpu(ir->index_block_size);
+ if (ni->itype.index.block_size & (ni->itype.index.block_size - 1)) {
+ ntfs_error(vi->i_sb, "Index block size (%u) is not a power of "
+ "two.", ni->itype.index.block_size);
+ goto unm_err_out;
+ }
+ if (ni->itype.index.block_size > PAGE_CACHE_SIZE) {
+ ntfs_error(vi->i_sb, "Index block size (%u) > PAGE_CACHE_SIZE "
+ "(%ld) is not supported. Sorry.",
+ ni->itype.index.block_size, PAGE_CACHE_SIZE);
+ err = -EOPNOTSUPP;
+ goto unm_err_out;
+ }
+ if (ni->itype.index.block_size < NTFS_BLOCK_SIZE) {
+ ntfs_error(vi->i_sb, "Index block size (%u) < NTFS_BLOCK_SIZE "
+ "(%i) is not supported. Sorry.",
+ ni->itype.index.block_size, NTFS_BLOCK_SIZE);
+ err = -EOPNOTSUPP;
+ goto unm_err_out;
+ }
+ ni->itype.index.block_size_bits = ffs(ni->itype.index.block_size) - 1;
+ /* Determine the size of a vcn in the index. */
+ 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;
+ }
+ /* Check for presence of index allocation attribute. */
+ if (!(ir->index.flags & LARGE_INDEX)) {
+ /* No index allocation. */
+ vi->i_size = ni->initialized_size = ni->allocated_size = 0;
+ /* We are done with the mft record, so we release it. */
+ put_attr_search_ctx(ctx);
+ unmap_mft_record(base_ni);
+ m = NULL;
+ ctx = NULL;
+ goto skip_large_index_stuff;
+ } /* LARGE_INDEX: Index allocation present. Setup state. */
+ NInoSetIndexAllocPresent(ni);
+ /* Find index allocation attribute. */
+ reinit_attr_search_ctx(ctx);
+ if (!lookup_attr(AT_INDEX_ALLOCATION, ni->name, ni->name_len,
+ CASE_SENSITIVE, 0, NULL, 0, ctx)) {
+ ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute is not "
+ "present but $INDEX_ROOT indicated it is.");
+ goto unm_err_out;
+ }
+ if (!ctx->attr->non_resident) {
+ ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute is "
+ "resident.");
+ goto unm_err_out;
+ }
+ if (ctx->attr->flags & ATTR_IS_ENCRYPTED) {
+ ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute is "
+ "encrypted.");
+ goto unm_err_out;
+ }
+ if (ctx->attr->flags & ATTR_IS_SPARSE) {
+ ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute is sparse.");
+ goto unm_err_out;
+ }
+ if (ctx->attr->flags & ATTR_COMPRESSION_MASK) {
+ ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute is "
+ "compressed.");
+ goto unm_err_out;
+ }
+ if (ctx->attr->data.non_resident.lowest_vcn) {
+ ntfs_error(vi->i_sb, "First extent of $INDEX_ALLOCATION "
+ "attribute has non zero lowest_vcn. Inode is "
+ "corrupt. You should run chkdsk.");
+ goto unm_err_out;
+ }
+ vi->i_size = sle64_to_cpu(ctx->attr->data.non_resident.data_size);
+ ni->initialized_size = sle64_to_cpu(
+ ctx->attr->data.non_resident.initialized_size);
+ ni->allocated_size = sle64_to_cpu(
+ ctx->attr->data.non_resident.allocated_size);
+ /*
+ * We are done with the mft record, so we release it. Otherwise
+ * we would deadlock in ntfs_attr_iget().
+ */
+ put_attr_search_ctx(ctx);
+ unmap_mft_record(base_ni);
+ m = NULL;
+ ctx = NULL;
+ /* Get the index bitmap attribute inode. */
+ bvi = ntfs_attr_iget(base_vi, AT_BITMAP, ni->name, ni->name_len);
+ if (unlikely(IS_ERR(bvi))) {
+ ntfs_error(vi->i_sb, "Failed to get bitmap attribute.");
+ err = PTR_ERR(bvi);
+ goto unm_err_out;
+ }
+ bni = NTFS_I(bvi);
+ if (NInoCompressed(bni) || NInoEncrypted(bni) ||
+ NInoSparse(bni)) {
+ ntfs_error(vi->i_sb, "$BITMAP attribute is compressed "
+ "and/or encrypted and/or sparse.");
+ goto iput_unm_err_out;
+ }
+ /* Consistency check bitmap size vs. index allocation size. */
+ if ((bvi->i_size << 3) < (vi->i_size >>
+ ni->itype.index.block_size_bits)) {
+ ntfs_error(vi->i_sb, "Index bitmap too small (0x%llx) "
+ "for index allocation (0x%llx).",
+ bvi->i_size << 3, vi->i_size);
+ goto iput_unm_err_out;
+ }
+ ni->itype.index.bmp_ino = bvi;
+skip_large_index_stuff:
+ /* Setup the operations for this index inode. */
+ vi->i_op = NULL;
+ vi->i_fop = NULL;
+ vi->i_mapping->a_ops = &ntfs_mst_aops;
+ vi->i_blocks = ni->allocated_size >> 9;
+
+ /*
+ * Make sure the base inode doesn't go away and attach it to the
+ * index inode.
+ */
+ igrab(base_vi);
+ ni->ext.base_ntfs_ino = base_ni;
+ ni->nr_extents = -1;
+
+ ntfs_debug("Done.");
+ return 0;
+
+iput_unm_err_out:
+ iput(bvi);
+unm_err_out:
+ if (!err)
+ err = -EIO;
+ if (ctx)
+ put_attr_search_ctx(ctx);
+ if (m)
+ unmap_mft_record(base_ni);
+err_out:
+ ntfs_error(vi->i_sb, "Failed with error code %i while reading index "
+ "inode (mft_no 0x%lx, name_len %i.", -err, vi->i_ino,
+ ni->name_len);
+ make_bad_inode(vi);
+ return err;
+}
+
/**
* ntfs_read_inode_mount - special read_inode for mount time use only
* @vi: inode to read
* This should work but there are two possible pit falls (see inline comments
* below), but only time will tell if they are real pits or just smoke...
*/
-void ntfs_read_inode_mount(struct inode *vi)
+int ntfs_read_inode_mount(struct inode *vi)
{
VCN next_vcn, last_vcn, highest_vcn;
s64 block;
ntfs_debug("Entering.");
- if (vi->i_ino != FILE_MFT) {
- ntfs_error(sb, "Called for inode 0x%lx but only inode %d "
- "allowed.", vi->i_ino, FILE_MFT);
- goto err_out;
- }
-
/* Initialize the ntfs specific part of @vi. */
ntfs_init_big_inode(vi);
ni->name_len = 0;
/*
- * This sets up our little cheat allowing us to reuse the async io
+ * This sets up our little cheat allowing us to reuse the async read io
* completion handler for directories.
*/
ni->itype.index.block_size = vol->mft_record_size;
/*
* We have got the first extent of the run_list for
* $MFT which means it is now relatively safe to call
- * the normal ntfs_read_inode() function. Thus, take
- * us out of the calling chain. Also we need to do this
- * now because we need ntfs_read_inode() in place to
- * get at subsequent extents.
- */
- sb->s_op = &ntfs_sops;
- /*
+ * the normal ntfs_read_inode() function.
* Complete reading the inode, this will actually
* re-read the mft record for $MFT, this time entering
* it into the page cache with which we complete the
"sourceforge.net");
put_attr_search_ctx(ctx);
/* Revert to the safe super operations. */
- sb->s_op = &ntfs_mount_sops;
- goto out_now;
+ ntfs_free(m);
+ return -1;
}
/*
* Re-initialize some specifics about $MFT's inode as
}
put_attr_search_ctx(ctx);
ntfs_debug("Done.");
-out_now:
ntfs_free(m);
- return;
+ return 0;
+
em_put_err_out:
ntfs_error(sb, "Couldn't find first extent of $DATA attribute in "
"attribute list. $MFT is corrupt. Run chkdsk.");
put_err_out:
put_attr_search_ctx(ctx);
err_out:
- /* Make sure we revert to the safe super operations. */
- sb->s_op = &ntfs_mount_sops;
ntfs_error(sb, "Failed. Marking inode as bad.");
make_bad_inode(vi);
- goto out_now;
-}
-
-/**
- * ntfs_commit_inode - write out a dirty inode
- * @ni: inode to write out
- *
- */
-int ntfs_commit_inode(ntfs_inode *ni)
-{
- ntfs_debug("Entering for inode 0x%lx.", ni->mft_no);
- NInoClearDirty(ni);
- return 0;
+ ntfs_free(m);
+ return -1;
}
/**
* The VFS calls ntfs_put_inode() every time the inode reference count (i_count)
* is about to be decremented (but before the decrement itself.
*
- * If the inode @vi is a directory with a single reference, we need to put the
- * attribute inode for the directory index bitmap, if it is present, otherwise
- * the directory inode would remain pinned for ever (or rather until umount()
- * time.
+ * If the inode @vi is a directory with two references, one of which is being
+ * dropped, we need to put the attribute inode for the directory index bitmap,
+ * if it is present, otherwise the directory inode would remain pinned for
+ * ever.
+ *
+ * If the inode @vi is an index inode with only one reference which is being
+ * dropped, we need to put the attribute inode for the index bitmap, if it is
+ * present, otherwise the index inode would disappear and the attribute inode
+ * for the index bitmap would no longer be referenced from anywhere and thus it
+ * would remain pinned for ever.
*/
void ntfs_put_inode(struct inode *vi)
{
- if (S_ISDIR(vi->i_mode) && (atomic_read(&vi->i_count) == 2)) {
- ntfs_inode *ni;
+ ntfs_inode *ni;
- ni = NTFS_I(vi);
- if (NInoIndexAllocPresent(ni) && ni->itype.index.bmp_ino) {
- iput(ni->itype.index.bmp_ino);
- ni->itype.index.bmp_ino = NULL;
+ if (S_ISDIR(vi->i_mode)) {
+ if (atomic_read(&vi->i_count) == 2) {
+ ni = NTFS_I(vi);
+ if (NInoIndexAllocPresent(ni) &&
+ ni->itype.index.bmp_ino) {
+ iput(ni->itype.index.bmp_ino);
+ ni->itype.index.bmp_ino = NULL;
+ }
}
+ return;
+ }
+ if (atomic_read(&vi->i_count) != 1)
+ return;
+ ni = NTFS_I(vi);
+ if (NInoAttr(ni) && (ni->type == AT_INDEX_ALLOCATION) &&
+ NInoIndexAllocPresent(ni) && ni->itype.index.bmp_ino) {
+ iput(ni->itype.index.bmp_ino);
+ ni->itype.index.bmp_ino = NULL;
}
return;
}
void __ntfs_clear_inode(ntfs_inode *ni)
{
- int err;
-
- ntfs_debug("Entering for inode 0x%lx.", ni->mft_no);
- if (NInoDirty(ni)) {
- err = ntfs_commit_inode(ni);
- if (err) {
- ntfs_error(ni->vol->sb, "Failed to commit dirty "
- "inode synchronously.");
- // FIXME: Do something!!!
- }
- }
- /* Synchronize with ntfs_commit_inode(). */
- down(&ni->mrec_lock);
- up(&ni->mrec_lock);
- if (NInoDirty(ni)) {
- ntfs_error(ni->vol->sb, "Failed to commit dirty inode "
- "asynchronously.");
- // FIXME: Do something!!!
- }
- /* No need to lock at this stage as no one else has a reference. */
- if (ni->nr_extents > 0) {
- int i;
-
- // FIXME: Handle dirty case for each extent inode!
- for (i = 0; i < ni->nr_extents; i++)
- ntfs_clear_extent_inode(ni->ext.extent_ntfs_inos[i]);
- kfree(ni->ext.extent_ntfs_inos);
- }
/* Free all alocated memory. */
down_write(&ni->run_list.lock);
if (ni->run_list.rl) {
void ntfs_clear_extent_inode(ntfs_inode *ni)
{
+ ntfs_debug("Entering for inode 0x%lx.", ni->mft_no);
+
+ BUG_ON(NInoAttr(ni));
+ BUG_ON(ni->nr_extents != -1);
+
+#ifdef NTFS_RW
+ if (NInoDirty(ni)) {
+ if (!is_bad_inode(VFS_I(ni->ext.base_ntfs_ino)))
+ ntfs_error(ni->vol->sb, "Clearing dirty extent inode! "
+ "Losing data! This is a BUG!!!");
+ // FIXME: Do something!!!
+ }
+#endif /* NTFS_RW */
+
__ntfs_clear_inode(ni);
/* Bye, bye... */
{
ntfs_inode *ni = NTFS_I(vi);
+#ifdef NTFS_RW
+ if (NInoDirty(ni)) {
+ BOOL was_bad = (is_bad_inode(vi));
+
+ /* Committing the inode also commits all extent inodes. */
+ ntfs_commit_inode(vi);
+
+ if (!was_bad && (is_bad_inode(vi) || NInoDirty(ni))) {
+ ntfs_error(vi->i_sb, "Failed to commit dirty inode "
+ "0x%lx. Losing data!", vi->i_ino);
+ // FIXME: Do something!!!
+ }
+ }
+#endif /* NTFS_RW */
+
+ /* No need to lock at this stage as no one else has a reference. */
+ if (ni->nr_extents > 0) {
+ int i;
+
+ for (i = 0; i < ni->nr_extents; i++)
+ ntfs_clear_extent_inode(ni->ext.extent_ntfs_inos[i]);
+ kfree(ni->ext.extent_ntfs_inos);
+ }
+
__ntfs_clear_inode(ni);
if (NInoAttr(ni)) {
return err;
}
+/**
+ * ntfs_write_inode - write out a dirty inode
+ * @vi: inode to write out
+ * @sync: if true, write out synchronously
+ *
+ * Write out a dirty inode to disk including any extent inodes if present.
+ *
+ * If @sync is true, commit the inode to disk and wait for io completion. This
+ * is done using write_mft_record().
+ *
+ * If @sync is false, just schedule the write to happen but do not wait for i/o
+ * completion. In 2.6 kernels, scheduling usually happens just by virtue of
+ * marking the page (and in this case mft record) dirty but we do not implement
+ * this yet as write_mft_record() largely ignores the @sync parameter and
+ * always performs synchronous writes.
+ */
+void ntfs_write_inode(struct inode *vi, int sync)
+{
+ ntfs_inode *ni = NTFS_I(vi);
+#if 0
+ attr_search_context *ctx;
+#endif
+ MFT_RECORD *m;
+ int err = 0;
+
+ ntfs_debug("Entering for %sinode 0x%lx.", NInoAttr(ni) ? "attr " : "",
+ vi->i_ino);
+ /*
+ * Dirty attribute inodes are written via their real inodes so just
+ * clean them here. TODO: Take care of access time updates.
+ */
+ if (NInoAttr(ni)) {
+ NInoClearDirty(ni);
+ return;
+ }
+ /* Map, pin, and lock the mft record belonging to the inode. */
+ m = map_mft_record(ni);
+ if (unlikely(IS_ERR(m))) {
+ err = PTR_ERR(m);
+ goto err_out;
+ }
+#if 0
+ /* Obtain the standard information attribute. */
+ ctx = get_attr_search_ctx(ni, m);
+ if (unlikely(!ctx)) {
+ err = -ENOMEM;
+ goto unm_err_out;
+ }
+ if (unlikely(!lookup_attr(AT_STANDARD_INFORMATION, NULL, 0,
+ CASE_SENSITIVE, 0, NULL, 0, ctx))) {
+ put_attr_search_ctx(ctx);
+ err = -ENOENT;
+ goto unm_err_out;
+ }
+ // TODO: Update the access times in the standard information attribute
+ // which is now in ctx->attr.
+ // - Probably want to have use sops->dirty_inode() to set a flag that
+ // we need to update the times here rather than having to blindly do
+ // it every time. Or even don't do it here at all and do it in
+ // sops->dirty_inode() instead. Problem with this would be that
+ // sops->dirty_inode() must be atomic under certain circumstances
+ // and mapping mft records and such like is not atomic.
+ // - For atime updates also need to check whether they are enabled in
+ // the superblock flags.
+ ntfs_warning(vi->i_sb, "Access time updates not implement yet.");
+ /*
+ * We just modified the mft record containing the standard information
+ * attribute. So need to mark the mft record dirty, too, but we do it
+ * manually so that mark_inode_dirty() is not called again.
+ * TODO: Only do this if there was a change in any of the times!
+ */
+ if (!NInoTestSetDirty(ctx->ntfs_ino))
+ __set_page_dirty_nobuffers(ctx->ntfs_ino->page);
+ put_attr_search_ctx(ctx);
+#endif
+ /* Write this base mft record. */
+ if (NInoDirty(ni))
+ err = write_mft_record(ni, m, sync);
+ /* Write all attached extent mft records. */
+ down(&ni->extent_lock);
+ if (ni->nr_extents > 0) {
+ ntfs_inode **extent_nis = ni->ext.extent_ntfs_inos;
+ int i;
+
+ ntfs_debug("Writing %i extent inodes.", ni->nr_extents);
+ for (i = 0; i < ni->nr_extents; i++) {
+ ntfs_inode *tni = extent_nis[i];
+
+ if (NInoDirty(tni)) {
+ MFT_RECORD *tm = map_mft_record(tni);
+ int ret;
+
+ if (unlikely(IS_ERR(tm))) {
+ if (!err || err == -ENOMEM)
+ err = PTR_ERR(tm);
+ continue;
+ }
+ ret = write_mft_record(tni, tm, sync);
+ unmap_mft_record(tni);
+ if (unlikely(ret)) {
+ if (!err || err == -ENOMEM)
+ err = ret;
+ }
+ }
+ }
+ }
+ up(&ni->extent_lock);
+ unmap_mft_record(ni);
+ if (unlikely(err))
+ goto err_out;
+ ntfs_debug("Done.");
+ return;
+#if 0
+unm_err_out:
+ unmap_mft_record(ni);
#endif
+err_out:
+ if (err == -ENOMEM) {
+ ntfs_warning(vi->i_sb, "Not enough memory to write inode. "
+ "Marking the inode dirty again, so the VFS "
+ "retries later.");
+ mark_inode_dirty(vi);
+ } else {
+ ntfs_error(vi->i_sb, "Failed (error code %i): Marking inode "
+ "as bad. You should run chkdsk.", -err);
+ make_bad_inode(vi);
+ }
+ return;
+}
+
+#endif /* NTFS_RW */
git://git.onelab.eu / linux-2.6.git / blobdiff