le16_to_cpu(ref->seq), le16_to_cpu(rec->seq));
goto out;
} else if (!is_rec_inuse(rec)) {
- err = -EINVAL;
+ err = -ESTALE;
ntfs_err(sb, "Inode r=%x is not in use!", (u32)ino);
goto out;
}
goto out;
}
- if (!is_rec_base(rec))
- goto Ok;
+ if (!is_rec_base(rec)) {
+ err = -EINVAL;
+ goto out;
+ }
/* Record should contain $I30 root. */
is_dir = rec->flags & RECORD_FLAG_DIR;
rsize = attr->non_res ? 0 : le32_to_cpu(attr->res.data_size);
asize = le32_to_cpu(attr->size);
+ if (le16_to_cpu(attr->name_off) + attr->name_len > asize)
+ goto out;
+
+ if (attr->non_res) {
+ t64 = le64_to_cpu(attr->nres.alloc_size);
+ if (le64_to_cpu(attr->nres.data_size) > t64 ||
+ le64_to_cpu(attr->nres.valid_size) > t64)
+ goto out;
+ }
+
switch (attr->type) {
case ATTR_STD:
if (attr->non_res ||
attr_unpack_run:
roff = le16_to_cpu(attr->nres.run_off);
+ if (roff > asize) {
+ err = -EINVAL;
+ goto out;
+ }
+
t64 = le64_to_cpu(attr->nres.svcn);
+
err = run_unpack_ex(run, sbi, ino, t64, le64_to_cpu(attr->nres.evcn),
t64, Add2Ptr(attr, roff), asize - roff);
if (err < 0)
inode->i_flags |= S_NOSEC;
}
-Ok:
if (ino == MFT_REC_MFT && !sb->s_root)
sbi->mft.ni = NULL;
_ntfs_bad_inode(inode);
}
+ if (IS_ERR(inode) && name)
+ ntfs_set_state(sb->s_fs_info, NTFS_DIRTY_ERROR);
+
return inode;
}
clear_buffer_new(bh);
clear_buffer_uptodate(bh);
- /* Direct write uses 'create=0'. */
- if (!create && vbo >= ni->i_valid) {
- /* Out of valid. */
- return 0;
- }
-
- if (vbo >= inode->i_size) {
- /* Out of size. */
- return 0;
- }
-
if (is_resident(ni)) {
ni_lock(ni);
err = attr_data_read_resident(ni, page);
off = vbo & sbi->cluster_mask;
new = false;
- err = attr_data_get_block(ni, vcn, 1, &lcn, &len, create ? &new : NULL);
+ err = attr_data_get_block(ni, vcn, 1, &lcn, &len, create ? &new : NULL,
+ create && sbi->cluster_size > PAGE_SIZE);
if (err)
goto out;
WARN_ON(1);
}
- if (new) {
+ if (new)
set_buffer_new(bh);
- if ((len << cluster_bits) > block_size)
- ntfs_sparse_cluster(inode, page, vcn, len);
- }
lbo = ((u64)lcn << cluster_bits) + off;
}
} else if (vbo >= valid) {
/* Read out of valid data. */
- /* Should never be here 'cause already checked. */
clear_buffer_mapped(bh);
} else if (vbo + bytes <= valid) {
/* Normal read. */
return err;
}
-static int ntfs_writepage(struct page *page, struct writeback_control *wbc)
+static int ntfs_resident_writepage(struct page *page,
+ struct writeback_control *wbc, void *data)
{
- struct address_space *mapping = page->mapping;
- struct inode *inode = mapping->host;
- struct ntfs_inode *ni = ntfs_i(inode);
- int err;
+ struct address_space *mapping = data;
+ struct ntfs_inode *ni = ntfs_i(mapping->host);
+ int ret;
- if (is_resident(ni)) {
- ni_lock(ni);
- err = attr_data_write_resident(ni, page);
- ni_unlock(ni);
- if (err != E_NTFS_NONRESIDENT) {
- unlock_page(page);
- return err;
- }
- }
+ ni_lock(ni);
+ ret = attr_data_write_resident(ni, page);
+ ni_unlock(ni);
- return block_write_full_page(page, ntfs_get_block, wbc);
+ if (ret != E_NTFS_NONRESIDENT)
+ unlock_page(page);
+ mapping_set_error(mapping, ret);
+ return ret;
}
static int ntfs_writepages(struct address_space *mapping,
struct writeback_control *wbc)
{
- /* Redirect call to 'ntfs_writepage' for resident files. */
if (is_resident(ntfs_i(mapping->host)))
- return generic_writepages(mapping, wbc);
+ return write_cache_pages(mapping, wbc, ntfs_resident_writepage,
+ mapping);
return mpage_writepages(mapping, wbc, ntfs_get_block);
}
dirty = true;
}
+ if (pos + err > inode->i_size) {
+ inode->i_size = pos + err;
+ dirty = true;
+ }
+
if (dirty)
mark_inode_dirty(inode);
}
return ERR_PTR(err);
}
+/*
+ * ntfs_create_inode
+ *
+ * Helper function for:
+ * - ntfs_create
+ * - ntfs_mknod
+ * - ntfs_symlink
+ * - ntfs_mkdir
+ * - ntfs_atomic_open
+ *
+ * NOTE: if fnd != NULL (ntfs_atomic_open) then @dir is locked
+ */
struct inode *ntfs_create_inode(struct user_namespace *mnt_userns,
struct inode *dir, struct dentry *dentry,
const struct cpu_str *uni, umode_t mode,
struct REPARSE_DATA_BUFFER *rp = NULL;
bool rp_inserted = false;
- ni_lock_dir(dir_ni);
+ if (!fnd)
+ ni_lock_dir(dir_ni);
dir_root = indx_get_root(&dir_ni->dir, dir_ni, NULL, NULL);
if (!dir_root) {
fa = FILE_ATTRIBUTE_ARCHIVE;
}
+ /* If option "hide_dot_files" then set hidden attribute for dot files. */
+ if (sbi->options->hide_dot_files && name->name[0] == '.')
+ fa |= FILE_ATTRIBUTE_HIDDEN;
+
if (!(mode & 0222))
fa |= FILE_ATTRIBUTE_READONLY;
mi_get_ref(&ni->mi, &new_de->ref);
fname = (struct ATTR_FILE_NAME *)(new_de + 1);
+
+ if (sbi->options->windows_names &&
+ !valid_windows_name(sbi, (struct le_str *)&fname->name_len)) {
+ err = -EINVAL;
+ goto out4;
+ }
+
mi_get_ref(&dir_ni->mi, &fname->home);
fname->dup.cr_time = fname->dup.m_time = fname->dup.c_time =
fname->dup.a_time = std5->cr_time;
cpu_to_le64(ntfs_up_cluster(sbi, nsize));
err = attr_allocate_clusters(sbi, &ni->file.run, 0, 0,
- clst, NULL, 0, &alen, 0,
- NULL);
+ clst, NULL, ALLOCATE_DEF,
+ &alen, 0, NULL, NULL);
if (err)
goto out5;
goto out6;
/* Unlock parent directory before ntfs_init_acl. */
- ni_unlock(dir_ni);
+ if (!fnd)
+ ni_unlock(dir_ni);
inode->i_generation = le16_to_cpu(rec->seq);
out7:
/* Undo 'indx_insert_entry'. */
- ni_lock_dir(dir_ni);
+ if (!fnd)
+ ni_lock_dir(dir_ni);
indx_delete_entry(&dir_ni->dir, dir_ni, new_de + 1,
le16_to_cpu(new_de->key_size), sbi);
/* ni_unlock(dir_ni); will be called later. */
ntfs_remove_reparse(sbi, IO_REPARSE_TAG_SYMLINK, &new_de->ref);
out5:
- if (S_ISDIR(mode) || run_is_empty(&ni->file.run))
- goto out4;
-
- run_deallocate(sbi, &ni->file.run, false);
+ if (!S_ISDIR(mode))
+ run_deallocate(sbi, &ni->file.run, false);
out4:
clear_rec_inuse(rec);
out1:
if (err) {
- ni_unlock(dir_ni);
+ if (!fnd)
+ ni_unlock(dir_ni);
return ERR_PTR(err);
}
ni_clear(ntfs_i(inode));
}
-static noinline int ntfs_readlink_hlp(struct inode *inode, char *buffer,
+/*
+ * ntfs_translate_junction
+ *
+ * Translate a Windows junction target to the Linux equivalent.
+ * On junctions, targets are always absolute (they include the drive
+ * letter). We have no way of knowing if the target is for the current
+ * mounted device or not so we just assume it is.
+ */
+static int ntfs_translate_junction(const struct super_block *sb,
+ const struct dentry *link_de, char *target,
+ int target_len, int target_max)
+{
+ int tl_len, err = target_len;
+ char *link_path_buffer = NULL, *link_path;
+ char *translated = NULL;
+ char *target_start;
+ int copy_len;
+
+ link_path_buffer = kmalloc(PATH_MAX, GFP_NOFS);
+ if (!link_path_buffer) {
+ err = -ENOMEM;
+ goto out;
+ }
+ /* Get link path, relative to mount point */
+ link_path = dentry_path_raw(link_de, link_path_buffer, PATH_MAX);
+ if (IS_ERR(link_path)) {
+ ntfs_err(sb, "Error getting link path");
+ err = -EINVAL;
+ goto out;
+ }
+
+ translated = kmalloc(PATH_MAX, GFP_NOFS);
+ if (!translated) {
+ err = -ENOMEM;
+ goto out;
+ }
+
+ /* Make translated path a relative path to mount point */
+ strcpy(translated, "./");
+ ++link_path; /* Skip leading / */
+ for (tl_len = sizeof("./") - 1; *link_path; ++link_path) {
+ if (*link_path == '/') {
+ if (PATH_MAX - tl_len < sizeof("../")) {
+ ntfs_err(sb,
+ "Link path %s has too many components",
+ link_path);
+ err = -EINVAL;
+ goto out;
+ }
+ strcpy(translated + tl_len, "../");
+ tl_len += sizeof("../") - 1;
+ }
+ }
+
+ /* Skip drive letter */
+ target_start = target;
+ while (*target_start && *target_start != ':')
+ ++target_start;
+
+ if (!*target_start) {
+ ntfs_err(sb, "Link target (%s) missing drive separator",
+ target);
+ err = -EINVAL;
+ goto out;
+ }
+
+ /* Skip drive separator and leading /, if exists */
+ target_start += 1 + (target_start[1] == '/');
+ copy_len = target_len - (target_start - target);
+
+ if (PATH_MAX - tl_len <= copy_len) {
+ ntfs_err(sb, "Link target %s too large for buffer (%d <= %d)",
+ target_start, PATH_MAX - tl_len, copy_len);
+ err = -EINVAL;
+ goto out;
+ }
+
+ /* translated path has a trailing / and target_start does not */
+ strcpy(translated + tl_len, target_start);
+ tl_len += copy_len;
+ if (target_max <= tl_len) {
+ ntfs_err(sb, "Target path %s too large for buffer (%d <= %d)",
+ translated, target_max, tl_len);
+ err = -EINVAL;
+ goto out;
+ }
+ strcpy(target, translated);
+ err = tl_len;
+
+out:
+ kfree(link_path_buffer);
+ kfree(translated);
+ return err;
+}
+
+static noinline int ntfs_readlink_hlp(const struct dentry *link_de,
+ struct inode *inode, char *buffer,
int buflen)
{
int i, err = -EINVAL;
/* Always set last zero. */
buffer[err] = 0;
+
+ /* If this is a junction, translate the link target. */
+ if (rp->ReparseTag == IO_REPARSE_TAG_MOUNT_POINT)
+ err = ntfs_translate_junction(sb, link_de, buffer, err, buflen);
+
out:
kfree(to_free);
return err;
if (!ret)
return ERR_PTR(-ENOMEM);
- err = ntfs_readlink_hlp(inode, ret, PAGE_SIZE);
+ err = ntfs_readlink_hlp(de, inode, ret, PAGE_SIZE);
if (err < 0) {
kfree(ret);
return ERR_PTR(err);
const struct address_space_operations ntfs_aops = {
.read_folio = ntfs_read_folio,
.readahead = ntfs_readahead,
- .writepage = ntfs_writepage,
.writepages = ntfs_writepages,
.write_begin = ntfs_write_begin,
.write_end = ntfs_write_end,
.direct_IO = ntfs_direct_IO,
.bmap = ntfs_bmap,
.dirty_folio = block_dirty_folio,
+ .migrate_folio = buffer_migrate_folio,
.invalidate_folio = block_invalidate_folio,
};
projects / mirror_ubuntu-kernels.git / blobdiff