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authorChristian Brauner <brauner@kernel.org>2022-06-21 16:14:52 +0200
committerChristian Brauner (Microsoft) <brauner@kernel.org>2022-06-26 18:18:55 +0200
commit71e7b535b8900d7ce7d5279fa472711db5251ae5 (patch)
treebb7ac09a191663bb09e5d0cfc5e794d35a66ad08
parent35faf3109a78516f60ca13f957083d5e5535fde0 (diff)
quota: port quota helpers mount ids
Port the is_quota_modification() and dqout_transfer() helper to type safe vfs{g,u}id_t. Since these helpers are only called by a few filesystems don't introduce a new helper but simply extend the existing helpers to pass down the mount's idmapping. Note, that this is a non-functional change, i.e. nothing will have happened here or at the end of this series to how quota are done! This a change necessary because we will at the end of this series make ownership changes easier to reason about by keeping the original value in struct iattr for both non-idmapped and idmapped mounts. For now we always pass the initial idmapping which makes the idmapping functions these helpers call nops. This is done because we currently always pass the actual value to be written to i_{g,u}id via struct iattr. While this allowed us to treat the {g,u}id values in struct iattr as values that can be directly written to inode->i_{g,u}id it also increases the potential for confusion for filesystems. Now that we are have dedicated types to prevent this confusion we will ultimately only map the value from the idmapped mount into a filesystem value that can be written to inode->i_{g,u}id when the filesystem actually updates the inode. So pass down the initial idmapping until we finished that conversion at which point we pass down the mount's idmapping. Since struct iattr uses an anonymous union with overlapping types as supported by the C standard, filesystems that haven't converted to ia_vfs{g,u}id won't see any difference and things will continue to work as before. In other words, no functional changes intended with this change. Link: https://lore.kernel.org/r/20220621141454.2914719-7-brauner@kernel.org Cc: Seth Forshee <sforshee@digitalocean.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Jan Kara <jack@suse.cz> Cc: Aleksa Sarai <cyphar@cyphar.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Al Viro <viro@zeniv.linux.org.uk> CC: linux-fsdevel@vger.kernel.org Reviewed-by: Jan Kara <jack@suse.cz> Reviewed-by: Seth Forshee <sforshee@digitalocean.com> Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
-rw-r--r--fs/ext2/inode.c4
-rw-r--r--fs/ext4/inode.c4
-rw-r--r--fs/f2fs/file.c4
-rw-r--r--fs/f2fs/recovery.c2
-rw-r--r--fs/jfs/file.c4
-rw-r--r--fs/ocfs2/file.c2
-rw-r--r--fs/quota/dquot.c3
-rw-r--r--fs/reiserfs/inode.c4
-rw-r--r--fs/zonefs/super.c2
-rw-r--r--include/linux/quotaops.h9
10 files changed, 21 insertions, 17 deletions
diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c
index 6dc66ab97d20..593b79416e0e 100644
--- a/fs/ext2/inode.c
+++ b/fs/ext2/inode.c
@@ -1679,14 +1679,14 @@ int ext2_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
if (error)
return error;
- if (is_quota_modification(inode, iattr)) {
+ if (is_quota_modification(&init_user_ns, inode, iattr)) {
error = dquot_initialize(inode);
if (error)
return error;
}
if (i_uid_needs_update(&init_user_ns, iattr, inode) ||
i_gid_needs_update(&init_user_ns, iattr, inode)) {
- error = dquot_transfer(inode, iattr);
+ error = dquot_transfer(&init_user_ns, inode, iattr);
if (error)
return error;
}
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 05d932f81c53..72f08c184768 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -5350,7 +5350,7 @@ int ext4_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
if (error)
return error;
- if (is_quota_modification(inode, attr)) {
+ if (is_quota_modification(&init_user_ns, inode, attr)) {
error = dquot_initialize(inode);
if (error)
return error;
@@ -5374,7 +5374,7 @@ int ext4_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
* counts xattr inode references.
*/
down_read(&EXT4_I(inode)->xattr_sem);
- error = dquot_transfer(inode, attr);
+ error = dquot_transfer(&init_user_ns, inode, attr);
up_read(&EXT4_I(inode)->xattr_sem);
if (error) {
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index a35d6b12bd63..02b2d56d4edc 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -915,7 +915,7 @@ int f2fs_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
if (err)
return err;
- if (is_quota_modification(inode, attr)) {
+ if (is_quota_modification(&init_user_ns, inode, attr)) {
err = f2fs_dquot_initialize(inode);
if (err)
return err;
@@ -923,7 +923,7 @@ int f2fs_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
if (i_uid_needs_update(&init_user_ns, attr, inode) ||
i_gid_needs_update(&init_user_ns, attr, inode)) {
f2fs_lock_op(F2FS_I_SB(inode));
- err = dquot_transfer(inode, attr);
+ err = dquot_transfer(&init_user_ns, inode, attr);
if (err) {
set_sbi_flag(F2FS_I_SB(inode),
SBI_QUOTA_NEED_REPAIR);
diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c
index 3cb7f8a43b4d..8e5a089f1ac8 100644
--- a/fs/f2fs/recovery.c
+++ b/fs/f2fs/recovery.c
@@ -266,7 +266,7 @@ static int recover_quota_data(struct inode *inode, struct page *page)
if (!attr.ia_valid)
return 0;
- err = dquot_transfer(inode, &attr);
+ err = dquot_transfer(&init_user_ns, inode, &attr);
if (err)
set_sbi_flag(F2FS_I_SB(inode), SBI_QUOTA_NEED_REPAIR);
return err;
diff --git a/fs/jfs/file.c b/fs/jfs/file.c
index 1d732fd223d4..c18569b9895d 100644
--- a/fs/jfs/file.c
+++ b/fs/jfs/file.c
@@ -95,14 +95,14 @@ int jfs_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
if (rc)
return rc;
- if (is_quota_modification(inode, iattr)) {
+ if (is_quota_modification(&init_user_ns, inode, iattr)) {
rc = dquot_initialize(inode);
if (rc)
return rc;
}
if ((iattr->ia_valid & ATTR_UID && !uid_eq(iattr->ia_uid, inode->i_uid)) ||
(iattr->ia_valid & ATTR_GID && !gid_eq(iattr->ia_gid, inode->i_gid))) {
- rc = dquot_transfer(inode, iattr);
+ rc = dquot_transfer(&init_user_ns, inode, iattr);
if (rc)
return rc;
}
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index 7497cd592258..0e09cd8911da 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -1146,7 +1146,7 @@ int ocfs2_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
if (status)
return status;
- if (is_quota_modification(inode, attr)) {
+ if (is_quota_modification(&init_user_ns, inode, attr)) {
status = dquot_initialize(inode);
if (status)
return status;
diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
index 6cec2bfbf51b..df9af1ce2851 100644
--- a/fs/quota/dquot.c
+++ b/fs/quota/dquot.c
@@ -2085,7 +2085,8 @@ EXPORT_SYMBOL(__dquot_transfer);
/* Wrapper for transferring ownership of an inode for uid/gid only
* Called from FSXXX_setattr()
*/
-int dquot_transfer(struct inode *inode, struct iattr *iattr)
+int dquot_transfer(struct user_namespace *mnt_userns, struct inode *inode,
+ struct iattr *iattr)
{
struct dquot *transfer_to[MAXQUOTAS] = {};
struct dquot *dquot;
diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c
index 0cffe054b78e..1e89e76972a0 100644
--- a/fs/reiserfs/inode.c
+++ b/fs/reiserfs/inode.c
@@ -3284,7 +3284,7 @@ int reiserfs_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
/* must be turned off for recursive notify_change calls */
ia_valid = attr->ia_valid &= ~(ATTR_KILL_SUID|ATTR_KILL_SGID);
- if (is_quota_modification(inode, attr)) {
+ if (is_quota_modification(&init_user_ns, inode, attr)) {
error = dquot_initialize(inode);
if (error)
return error;
@@ -3367,7 +3367,7 @@ int reiserfs_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
reiserfs_write_unlock(inode->i_sb);
if (error)
goto out;
- error = dquot_transfer(inode, attr);
+ error = dquot_transfer(&init_user_ns, inode, attr);
reiserfs_write_lock(inode->i_sb);
if (error) {
journal_end(&th);
diff --git a/fs/zonefs/super.c b/fs/zonefs/super.c
index 053299758deb..dd422b1d7320 100644
--- a/fs/zonefs/super.c
+++ b/fs/zonefs/super.c
@@ -616,7 +616,7 @@ static int zonefs_inode_setattr(struct user_namespace *mnt_userns,
!uid_eq(iattr->ia_uid, inode->i_uid)) ||
((iattr->ia_valid & ATTR_GID) &&
!gid_eq(iattr->ia_gid, inode->i_gid))) {
- ret = dquot_transfer(inode, iattr);
+ ret = dquot_transfer(&init_user_ns, inode, iattr);
if (ret)
return ret;
}
diff --git a/include/linux/quotaops.h b/include/linux/quotaops.h
index 61ee34861ca2..0342ff6584fd 100644
--- a/include/linux/quotaops.h
+++ b/include/linux/quotaops.h
@@ -20,7 +20,8 @@ static inline struct quota_info *sb_dqopt(struct super_block *sb)
}
/* i_mutex must being held */
-static inline bool is_quota_modification(struct inode *inode, struct iattr *ia)
+static inline bool is_quota_modification(struct user_namespace *mnt_userns,
+ struct inode *inode, struct iattr *ia)
{
return ((ia->ia_valid & ATTR_SIZE) ||
i_uid_needs_update(&init_user_ns, ia, inode) ||
@@ -115,7 +116,8 @@ int dquot_set_dqblk(struct super_block *sb, struct kqid id,
struct qc_dqblk *di);
int __dquot_transfer(struct inode *inode, struct dquot **transfer_to);
-int dquot_transfer(struct inode *inode, struct iattr *iattr);
+int dquot_transfer(struct user_namespace *mnt_userns, struct inode *inode,
+ struct iattr *iattr);
static inline struct mem_dqinfo *sb_dqinfo(struct super_block *sb, int type)
{
@@ -234,7 +236,8 @@ static inline void dquot_free_inode(struct inode *inode)
{
}
-static inline int dquot_transfer(struct inode *inode, struct iattr *iattr)
+static inline int dquot_transfer(struct user_namespace *mnt_userns,
+ struct inode *inode, struct iattr *iattr)
{
return 0;
}