The project id is necessary for quota project id support. This adds
support for the project id to UBIFS aswell as support for the
FS_PROJINHERIT_FL flag.
This includes a change for the UBIFS on-disk format. struct
ubifs_ino_node gains a project id number and a UBIFS_PROJINHERIT_FL
flag.
Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
---
fs/ubifs/dir.c | 11 +++++++-
fs/ubifs/ioctl.c | 61 +++++++++++++++++++++++++++++++++++++++++-
fs/ubifs/journal.c | 2 +-
fs/ubifs/super.c | 1 +
fs/ubifs/ubifs-media.h | 6 +++--
fs/ubifs/ubifs.h | 4 +++
6 files changed, 80 insertions(+), 5 deletions(-)
diff --git a/fs/ubifs/dir.c b/fs/ubifs/dir.c
index cfce5fee9262..e2d3dfb67ae3 100644
--- a/fs/ubifs/dir.c
+++ b/fs/ubifs/dir.c
@@ -56,7 +56,8 @@ static int inherit_flags(const struct inode *dir, umode_t mode)
*/
return 0;
- flags = ui->flags & (UBIFS_COMPR_FL | UBIFS_SYNC_FL | UBIFS_DIRSYNC_FL);
+ flags = ui->flags & (UBIFS_COMPR_FL | UBIFS_SYNC_FL | UBIFS_DIRSYNC_FL |
+ UBIFS_PROJINHERIT_FL);
if (!S_ISDIR(mode))
/* The "DIRSYNC" flag only applies to directories */
flags &= ~UBIFS_DIRSYNC_FL;
@@ -112,6 +113,11 @@ struct inode *ubifs_new_inode(struct ubifs_info *c, struct inode *dir,
current_time(inode);
inode->i_mapping->nrpages = 0;
+ if (ubifs_inode(dir)->flags & UBIFS_PROJINHERIT_FL)
+ ui->projid = ubifs_inode(dir)->projid;
+ else
+ ui->projid = make_kprojid(&init_user_ns, UBIFS_DEF_PROJID);
+
switch (mode & S_IFMT) {
case S_IFREG:
inode->i_mapping->a_ops = &ubifs_file_address_operations;
@@ -705,6 +711,9 @@ static int ubifs_link(struct dentry *old_dentry, struct inode *dir,
ubifs_assert(c, inode_is_locked(dir));
ubifs_assert(c, inode_is_locked(inode));
+ if (!projid_eq(dir_ui->projid, ui->projid))
+ return -EXDEV;
+
err = fscrypt_prepare_link(old_dentry, dir, dentry);
if (err)
return err;
diff --git a/fs/ubifs/ioctl.c b/fs/ubifs/ioctl.c
index 076102a918a8..92a782f3fdc2 100644
--- a/fs/ubifs/ioctl.c
+++ b/fs/ubifs/ioctl.c
@@ -66,6 +66,8 @@ static int ioctl2ubifs(int ioctl_flags)
ubifs_flags |= UBIFS_IMMUTABLE_FL;
if (ioctl_flags & FS_DIRSYNC_FL)
ubifs_flags |= UBIFS_DIRSYNC_FL;
+ if (ioctl_flags & FS_PROJINHERIT_FL)
+ ubifs_flags |= UBIFS_PROJINHERIT_FL;
return ubifs_flags;
}
@@ -91,6 +93,8 @@ static int ubifs2ioctl(int ubifs_flags)
ioctl_flags |= FS_IMMUTABLE_FL;
if (ubifs_flags & UBIFS_DIRSYNC_FL)
ioctl_flags |= FS_DIRSYNC_FL;
+ if (ubifs_flags & UBIFS_PROJINHERIT_FL)
+ ioctl_flags |= FS_PROJINHERIT_FL;
return ioctl_flags;
}
@@ -106,6 +110,8 @@ static inline unsigned long ubifs_xflags_to_iflags(__u32 xflags)
iflags |= UBIFS_IMMUTABLE_FL;
if (xflags & FS_XFLAG_APPEND)
iflags |= UBIFS_APPEND_FL;
+ if (xflags & FS_XFLAG_PROJINHERIT)
+ iflags |= UBIFS_PROJINHERIT_FL;
return iflags;
}
@@ -121,10 +127,51 @@ static inline __u32 ubifs_iflags_to_xflags(unsigned long flags)
xflags |= FS_XFLAG_IMMUTABLE;
if (flags & UBIFS_APPEND_FL)
xflags |= FS_XFLAG_APPEND;
+ if (flags & UBIFS_PROJINHERIT_FL)
+ xflags |= FS_XFLAG_PROJINHERIT;
return xflags;
}
+static int ubifs_ioctl_check_project(struct ubifs_inode *ui, struct fsxattr *fa)
+{
+ /*
+ * Project Quota ID state is only allowed to change from within the init
+ * namespace. Enforce that restriction only if we are trying to change
+ * the quota ID state. Everything else is allowed in user namespaces.
+ */
+ if (current_user_ns() == &init_user_ns)
+ return 0;
+
+ if (__kprojid_val(ui->projid) != fa->fsx_projid)
+ return -EINVAL;
+
+ if (ui->flags & UBIFS_PROJINHERIT_FL) {
+ if (!(fa->fsx_xflags & FS_XFLAG_PROJINHERIT))
+ return -EINVAL;
+ } else {
+ if (fa->fsx_xflags & FS_XFLAG_PROJINHERIT)
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int ubifs_ioc_setproject(struct file *file, __u32 projid)
+{
+ struct inode *inode = file_inode(file);
+ struct ubifs_inode *ui = ubifs_inode(inode);
+ kprojid_t kprojid;
+
+ kprojid = make_kprojid(&init_user_ns, (projid_t)projid);
+ if (projid_eq(kprojid, ui->projid))
+ return 0;
+
+ ui->projid = kprojid;
+
+ return 0;
+}
+
static int setflags(struct file *file, int flags, struct fsxattr *fa)
{
int ubi_flags, oldflags, err, release;
@@ -165,6 +212,16 @@ static int setflags(struct file *file, int flags, struct fsxattr *fa)
if (err)
goto out_unlock;
+ if (fa) {
+ err = ubifs_ioctl_check_project(ui, fa);
+ if (err)
+ goto out_unlock;
+
+ err = ubifs_ioc_setproject(file, fa->fsx_projid);
+ if (err)
+ goto out_unlock;
+ }
+
ui->flags = ubi_flags;
ubifs_set_inode_flags(inode);
inode->i_ctime = current_time(inode);
@@ -200,6 +257,7 @@ static int ubifs_ioc_fsgetxattr(struct file *file, void __user *arg)
memset(&fa, 0, sizeof(fa));
fa.fsx_xflags = ubifs_iflags_to_xflags(ui->flags);
+ fa.fsx_projid = (__u32)from_kprojid(&init_user_ns, ui->projid);
if (copy_to_user(arg, &fa, sizeof(fa)))
return -EFAULT;
@@ -209,7 +267,8 @@ static int ubifs_ioc_fsgetxattr(struct file *file, void __user *arg)
static int check_xflags(unsigned int flags)
{
- if (flags & ~(FS_XFLAG_SYNC | FS_XFLAG_IMMUTABLE | FS_XFLAG_APPEND))
+ if (flags & ~(FS_XFLAG_SYNC | FS_XFLAG_IMMUTABLE | FS_XFLAG_APPEND |
+ FS_XFLAG_PROJINHERIT))
return -EOPNOTSUPP;
return 0;
}
diff --git a/fs/ubifs/journal.c b/fs/ubifs/journal.c
index 4fd9683b8245..d8961993f9dd 100644
--- a/fs/ubifs/journal.c
+++ b/fs/ubifs/journal.c
@@ -54,7 +54,6 @@
*/
static inline void zero_ino_node_unused(struct ubifs_ino_node *ino)
{
- memset(ino->padding1, 0, 4);
memset(ino->padding2, 0, 26);
}
@@ -469,6 +468,7 @@ static void pack_inode(struct ubifs_info *c, struct ubifs_ino_node *ino,
ino->xattr_cnt = cpu_to_le32(ui->xattr_cnt);
ino->xattr_size = cpu_to_le32(ui->xattr_size);
ino->xattr_names = cpu_to_le32(ui->xattr_names);
+ ino->projid = cpu_to_le32(from_kprojid(&init_user_ns, ui->projid));
zero_ino_node_unused(ino);
/*
diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c
index 7d4547e5202d..281f34789e32 100644
--- a/fs/ubifs/super.c
+++ b/fs/ubifs/super.c
@@ -141,6 +141,7 @@ struct inode *ubifs_iget(struct super_block *sb, unsigned long inum)
ui->xattr_size = le32_to_cpu(ino->xattr_size);
ui->xattr_names = le32_to_cpu(ino->xattr_names);
ui->synced_i_size = ui->ui_size = inode->i_size;
+ ui->projid = make_kprojid(&init_user_ns, le32_to_cpu(ino->projid));
ui->xattr = (ui->flags & UBIFS_XATTR_FL) ? 1 : 0;
diff --git a/fs/ubifs/ubifs-media.h b/fs/ubifs/ubifs-media.h
index 3c9792cbb6ff..418f4eba1624 100644
--- a/fs/ubifs/ubifs-media.h
+++ b/fs/ubifs/ubifs-media.h
@@ -316,6 +316,7 @@ enum {
* UBIFS_DIRSYNC_FL: I/O on this directory inode has to be synchronous
* UBIFS_XATTR_FL: this inode is the inode for an extended attribute value
* UBIFS_CRYPT_FL: use encryption for this inode
+ * UBIFS_PROJINHERIT_FL: Create with parents projid
*
* Note, these are on-flash flags which correspond to ioctl flags
* (@FS_COMPR_FL, etc). They have the same values now, but generally, do not
@@ -329,6 +330,7 @@ enum {
UBIFS_DIRSYNC_FL = 0x10,
UBIFS_XATTR_FL = 0x20,
UBIFS_CRYPT_FL = 0x40,
+ UBIFS_PROJINHERIT_FL = 0x80,
};
/* Inode flag bits used by UBIFS */
@@ -497,7 +499,7 @@ union ubifs_dev_desc {
* @data_len: inode data length
* @xattr_cnt: count of extended attributes this inode has
* @xattr_size: summarized size of all extended attributes in bytes
- * @padding1: reserved for future, zeroes
+ * @projid: Quota project id
* @xattr_names: sum of lengths of all extended attribute names belonging to
* this inode
* @compr_type: compression type used for this inode
@@ -531,7 +533,7 @@ struct ubifs_ino_node {
__le32 data_len;
__le32 xattr_cnt;
__le32 xattr_size;
- __u8 padding1[4]; /* Watch 'zero_ino_node_unused()' if changing! */
+ __le32 projid;
__le32 xattr_names;
__le16 compr_type;
__u8 padding2[26]; /* Watch 'zero_ino_node_unused()' if changing! */
diff --git a/fs/ubifs/ubifs.h b/fs/ubifs/ubifs.h
index c55f212dcb75..3f8a33fca67b 100644
--- a/fs/ubifs/ubifs.h
+++ b/fs/ubifs/ubifs.h
@@ -155,6 +155,8 @@
#define UBIFS_HMAC_ARR_SZ 0
#endif
+#define UBIFS_DEF_PROJID 0
+
/*
* Lockdep classes for UBIFS inode @ui_mutex.
*/
@@ -362,6 +364,7 @@ struct ubifs_gced_idx_leb {
* inodes
* @ui_size: inode size used by UBIFS when writing to flash
* @flags: inode flags (@UBIFS_COMPR_FL, etc)
+ * @projid: The project id of this inode
* @compr_type: default compression type used for this inode
* @last_page_read: page number of last page read (for bulk read)
* @read_in_a_row: number of consecutive pages read in a row (for bulk read)
@@ -413,6 +416,7 @@ struct ubifs_inode {
loff_t synced_i_size;
loff_t ui_size;
int flags;
+ kprojid_t projid;
pgoff_t last_page_read;
pgoff_t read_in_a_row;
int data_len;
--
2.24.0.rc1
