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fs/ntfs3: Fix ntfs_create_inode()

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Previous variant creates an inode that requires update the parent directory
(ea_packed_size). Operations in ntfs_create_inode have been rearranged
so we insert new directory entry with correct ea_packed_size and
new created inode does not require update it's parent directory.

Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
This commit is contained in:
Konstantin Komarov 2023-01-16 13:03:24 +04:00
parent 267a36ba30
commit 1842fbc8d2
No known key found for this signature in database
GPG Key ID: A9B0331F832407B6
4 changed files with 58 additions and 49 deletions
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2
fs/ntfs3/file.c
View File

@ -703,7 +703,7 @@ int ntfs3_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
}
if (ia_valid & (ATTR_UID | ATTR_GID | ATTR_MODE))
ntfs_save_wsl_perm(inode);
ntfs_save_wsl_perm(inode, NULL);
mark_inode_dirty(inode);
out:
return err;

83
fs/ntfs3/inode.c
View File

@ -1320,8 +1320,7 @@ struct inode *ntfs_create_inode(struct mnt_idmap *idmap,
inode_init_owner(idmap, inode, dir, mode);
mode = inode->i_mode;
inode->i_atime = inode->i_mtime = inode->i_ctime = ni->i_crtime =
current_time(inode);
ni->i_crtime = current_time(inode);
rec = ni->mi.mrec;
rec->hard_links = cpu_to_le16(1);
@ -1362,10 +1361,9 @@ struct inode *ntfs_create_inode(struct mnt_idmap *idmap,
attr->res.data_size = cpu_to_le32(dsize);
std5->cr_time = std5->m_time = std5->c_time = std5->a_time =
kernel2nt(&inode->i_atime);
kernel2nt(&ni->i_crtime);
ni->std_fa = fa;
std5->fa = fa;
std5->fa = ni->std_fa = fa;
attr = Add2Ptr(attr, asize);
@ -1564,11 +1562,15 @@ struct inode *ntfs_create_inode(struct mnt_idmap *idmap,
}
asize = SIZEOF_NONRESIDENT + ALIGN(err, 8);
/* Write non resident data. */
err = ntfs_sb_write_run(sbi, &ni->file.run, 0, rp,
nsize, 0);
if (err)
goto out5;
} else {
attr->res.data_off = SIZEOF_RESIDENT_LE;
attr->res.data_size = cpu_to_le32(nsize);
memcpy(Add2Ptr(attr, SIZEOF_RESIDENT), rp, nsize);
nsize = 0;
}
/* Size of symlink equals the length of input string. */
inode->i_size = size;
@ -1589,19 +1591,8 @@ struct inode *ntfs_create_inode(struct mnt_idmap *idmap,
rec->used = cpu_to_le32(PtrOffset(rec, attr) + 8);
rec->next_attr_id = cpu_to_le16(aid);
/* Step 2: Add new name in index. */
err = indx_insert_entry(&dir_ni->dir, dir_ni, new_de, sbi, fnd, 0);
if (err)
goto out6;
/* Unlock parent directory before ntfs_init_acl. */
if (!fnd)
ni_unlock(dir_ni);
inode->i_generation = le16_to_cpu(rec->seq);
dir->i_mtime = dir->i_ctime = inode->i_atime;
if (S_ISDIR(mode)) {
inode->i_op = &ntfs_dir_inode_operations;
inode->i_fop = &ntfs_dir_operations;
@ -1626,41 +1617,58 @@ struct inode *ntfs_create_inode(struct mnt_idmap *idmap,
if (!S_ISLNK(mode) && (sb->s_flags & SB_POSIXACL)) {
err = ntfs_init_acl(idmap, inode, dir);
if (err)
goto out7;
goto out5;
} else
#endif
{
inode->i_flags |= S_NOSEC;
}
/* Write non resident data. */
if (nsize) {
err = ntfs_sb_write_run(sbi, &ni->file.run, 0, rp, nsize, 0);
if (err)
goto out7;
/*
* ntfs_init_acl and ntfs_save_wsl_perm update extended attribute.
* The packed size of extended attribute is stored in direntry too.
* 'fname' here points to inside new_de.
*/
ntfs_save_wsl_perm(inode, &fname->dup.ea_size);
/*
* update ea_size in file_name attribute too.
* Use ni_find_attr cause layout of MFT record may be changed
* in ntfs_init_acl and ntfs_save_wsl_perm.
*/
attr = ni_find_attr(ni, NULL, NULL, ATTR_NAME, NULL, 0, NULL, NULL);
if (attr) {
struct ATTR_FILE_NAME *fn;
fn = resident_data_ex(attr, SIZEOF_ATTRIBUTE_FILENAME);
if (fn)
fn->dup.ea_size = fname->dup.ea_size;
}
/* We do not need to update parent directory later */
ni->ni_flags &= ~NI_FLAG_UPDATE_PARENT;
/* Step 2: Add new name in index. */
err = indx_insert_entry(&dir_ni->dir, dir_ni, new_de, sbi, fnd, 0);
if (err)
goto out6;
/*
* Call 'd_instantiate' after inode->i_op is set
* but before finish_open.
*/
d_instantiate(dentry, inode);
ntfs_save_wsl_perm(inode);
/* Set original time. inode times (i_ctime) may be changed in ntfs_init_acl. */
inode->i_atime = inode->i_mtime = inode->i_ctime = dir->i_mtime =
dir->i_ctime = ni->i_crtime;
mark_inode_dirty(dir);
mark_inode_dirty(inode);
/* Normal exit. */
goto out2;
out7:
/* Undo 'indx_insert_entry'. */
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. */
out6:
if (rp_inserted)
ntfs_remove_reparse(sbi, IO_REPARSE_TAG_SYMLINK, &new_de->ref);
@ -1682,11 +1690,11 @@ out2:
kfree(rp);
out1:
if (err) {
if (!fnd)
ni_unlock(dir_ni);
if (!fnd)
ni_unlock(dir_ni);
if (err)
return ERR_PTR(err);
}
unlock_new_inode(inode);
@ -1783,9 +1791,6 @@ void ntfs_evict_inode(struct inode *inode)
{
truncate_inode_pages_final(&inode->i_data);
if (inode->i_nlink)
_ni_write_inode(inode, inode_needs_sync(inode));
invalidate_inode_buffers(inode);
clear_inode(inode);

2
fs/ntfs3/ntfs_fs.h
View File

@ -872,7 +872,7 @@ int ntfs_acl_chmod(struct mnt_idmap *idmap, struct dentry *dentry);
ssize_t ntfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
extern const struct xattr_handler *ntfs_xattr_handlers[];
int ntfs_save_wsl_perm(struct inode *inode);
int ntfs_save_wsl_perm(struct inode *inode, __le16 *ea_size);
void ntfs_get_wsl_perm(struct inode *inode);
/* globals from lznt.c */

20
fs/ntfs3/xattr.c
View File

@ -296,7 +296,8 @@ out:
static noinline int ntfs_set_ea(struct inode *inode, const char *name,
size_t name_len, const void *value,
size_t val_size, int flags, bool locked)
size_t val_size, int flags, bool locked,
__le16 *ea_size)
{
struct ntfs_inode *ni = ntfs_i(inode);
struct ntfs_sb_info *sbi = ni->mi.sbi;
@ -504,6 +505,8 @@ update_ea:
if (ea_info.size_pack != size_pack)
ni->ni_flags |= NI_FLAG_UPDATE_PARENT;
if (ea_size)
*ea_size = ea_info.size_pack;
mark_inode_dirty(&ni->vfs_inode);
out:
@ -633,7 +636,7 @@ static noinline int ntfs_set_acl_ex(struct mnt_idmap *idmap,
flags = 0;
}
err = ntfs_set_ea(inode, name, name_len, value, size, flags, 0);
err = ntfs_set_ea(inode, name, name_len, value, size, flags, 0, NULL);
if (err == -ENODATA && !size)
err = 0; /* Removing non existed xattr. */
if (!err) {
@ -923,7 +926,8 @@ set_new_fa:
}
/* Deal with NTFS extended attribute. */
err = ntfs_set_ea(inode, name, strlen(name), value, size, flags, 0);
err = ntfs_set_ea(inode, name, strlen(name), value, size, flags, 0,
NULL);
out:
inode->i_ctime = current_time(inode);
@ -937,7 +941,7 @@ out:
*
* save uid/gid/mode in xattr
*/
int ntfs_save_wsl_perm(struct inode *inode)
int ntfs_save_wsl_perm(struct inode *inode, __le16 *ea_size)
{
int err;
__le32 value;
@ -946,26 +950,26 @@ int ntfs_save_wsl_perm(struct inode *inode)
ni_lock(ni);
value = cpu_to_le32(i_uid_read(inode));
err = ntfs_set_ea(inode, "$LXUID", sizeof("$LXUID") - 1, &value,
sizeof(value), 0, true); /* true == already locked. */
sizeof(value), 0, true, ea_size);
if (err)
goto out;
value = cpu_to_le32(i_gid_read(inode));
err = ntfs_set_ea(inode, "$LXGID", sizeof("$LXGID") - 1, &value,
sizeof(value), 0, true);
sizeof(value), 0, true, ea_size);
if (err)
goto out;
value = cpu_to_le32(inode->i_mode);
err = ntfs_set_ea(inode, "$LXMOD", sizeof("$LXMOD") - 1, &value,
sizeof(value), 0, true);
sizeof(value), 0, true, ea_size);
if (err)
goto out;
if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
value = cpu_to_le32(inode->i_rdev);
err = ntfs_set_ea(inode, "$LXDEV", sizeof("$LXDEV") - 1, &value,
sizeof(value), 0, true);
sizeof(value), 0, true, ea_size);
if (err)
goto out;
}