This patch adds a new internal field of ext4 inode to save project
identifier. Also a new flag EXT4_INODE_PROJINHERIT is added for
inheriting project ID from parent directory.
Signed-off-by: Li Xi <lixi@xxxxxxx>
Reviewed-by: Jan Kara <jack@xxxxxxx>
---
fs/ext4/ext4.h | 21 +++++++++++++++++----
fs/ext4/ialloc.c | 5 +++++
fs/ext4/inode.c | 29 +++++++++++++++++++++++++++++
fs/ext4/namei.c | 17 +++++++++++++++++
fs/ext4/super.c | 1 +
include/uapi/linux/fs.h | 1 +
6 files changed, 70 insertions(+), 4 deletions(-)
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 7fec2ef..7acb2da 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -378,16 +378,18 @@ struct flex_groups {
#define EXT4_EA_INODE_FL 0x00200000 /* Inode used for large EA */
#define EXT4_EOFBLOCKS_FL 0x00400000 /* Blocks allocated beyond EOF */
#define EXT4_INLINE_DATA_FL 0x10000000 /* Inode has inline data. */
+#define EXT4_PROJINHERIT_FL 0x20000000 /* Create with parents projid */
#define EXT4_RESERVED_FL 0x80000000 /* reserved for ext4 lib */
-#define EXT4_FL_USER_VISIBLE 0x004BDFFF /* User visible flags */
-#define EXT4_FL_USER_MODIFIABLE 0x004380FF /* User modifiable flags */
+#define EXT4_FL_USER_VISIBLE 0x204BDFFF /* User visible flags */
+#define EXT4_FL_USER_MODIFIABLE 0x204380FF /* User modifiable flags */
/* Flags that should be inherited by new inodes from their parent. */
#define EXT4_FL_INHERITED (EXT4_SECRM_FL | EXT4_UNRM_FL | EXT4_COMPR_FL |\
EXT4_SYNC_FL | EXT4_NODUMP_FL | EXT4_NOATIME_FL |\
EXT4_NOCOMPR_FL | EXT4_JOURNAL_DATA_FL |\
- EXT4_NOTAIL_FL | EXT4_DIRSYNC_FL)
+ EXT4_NOTAIL_FL | EXT4_DIRSYNC_FL |\
+ EXT4_PROJINHERIT_FL)
/* Flags that are appropriate for regular files (all but dir-specific ones). */
#define EXT4_REG_FLMASK (~(EXT4_DIRSYNC_FL | EXT4_TOPDIR_FL))
@@ -435,6 +437,7 @@ enum {
EXT4_INODE_EA_INODE = 21, /* Inode used for large EA */
EXT4_INODE_EOFBLOCKS = 22, /* Blocks allocated beyond EOF */
EXT4_INODE_INLINE_DATA = 28, /* Data in inode. */
+ EXT4_INODE_PROJINHERIT = 29, /* Create with parents projid */
EXT4_INODE_RESERVED = 31, /* reserved for ext4 lib */
};
@@ -684,6 +687,7 @@ struct ext4_inode {
__le32 i_crtime; /* File Creation time */
__le32 i_crtime_extra; /* extra FileCreationtime (nsec << 2 | epoch) */
__le32 i_version_hi; /* high 32 bits for 64-bit version */
+ __le32 i_projid; /* Project ID */
};
struct move_extent {
@@ -939,6 +943,7 @@ struct ext4_inode_info {
/* Precomputed uuid+inum+igen checksum for seeding inode checksums */
__u32 i_csum_seed;
+ kprojid_t i_projid;
};
/*
@@ -1531,6 +1536,7 @@ static inline void ext4_clear_state_flags(struct ext4_inode_info *ei)
*/
#define EXT4_FEATURE_RO_COMPAT_METADATA_CSUM 0x0400
#define EXT4_FEATURE_RO_COMPAT_READONLY 0x1000
+#define EXT4_FEATURE_RO_COMPAT_PROJECT 0x2000
#define EXT4_FEATURE_INCOMPAT_COMPRESSION 0x0001
#define EXT4_FEATURE_INCOMPAT_FILETYPE 0x0002
@@ -1581,7 +1587,8 @@ static inline void ext4_clear_state_flags(struct ext4_inode_info *ei)
EXT4_FEATURE_RO_COMPAT_HUGE_FILE |\
EXT4_FEATURE_RO_COMPAT_BIGALLOC |\
EXT4_FEATURE_RO_COMPAT_METADATA_CSUM|\
- EXT4_FEATURE_RO_COMPAT_QUOTA)
+ EXT4_FEATURE_RO_COMPAT_QUOTA |\
+ EXT4_FEATURE_RO_COMPAT_PROJECT)
/*
* Default values for user and/or group using reserved blocks
@@ -1589,6 +1596,11 @@ static inline void ext4_clear_state_flags(struct ext4_inode_info *ei)
#define EXT4_DEF_RESUID 0
#define EXT4_DEF_RESGID 0
+/*
+ * Default project ID
+ */
+#define EXT4_DEF_PROJID 0
+
#define EXT4_DEF_INODE_READAHEAD_BLKS 32
/*
@@ -2141,6 +2153,7 @@ extern int ext4_zero_partial_blocks(handle_t *handle, struct inode *inode,
loff_t lstart, loff_t lend);
extern int ext4_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
extern qsize_t *ext4_get_reserved_space(struct inode *inode);
+extern int ext4_get_projid(struct inode *inode, kprojid_t *projid);
extern void ext4_da_update_reserve_space(struct inode *inode,
int used, int quota_claim);
diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
index ac644c3..10ca9dd 100644
--- a/fs/ext4/ialloc.c
+++ b/fs/ext4/ialloc.c
@@ -756,6 +756,11 @@ struct inode *__ext4_new_inode(handle_t *handle, struct inode *dir,
inode->i_gid = dir->i_gid;
} else
inode_init_owner(inode, dir, mode);
+ if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_PROJECT) &&
+ ext4_test_inode_flag(dir, EXT4_INODE_PROJINHERIT))
+ ei->i_projid = EXT4_I(dir)->i_projid;
+ else
+ ei->i_projid = make_kprojid(&init_user_ns, EXT4_DEF_PROJID);
dquot_initialize(inode);
if (!goal)
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 4df6d01..6e4833f 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -3870,6 +3870,14 @@ static inline void ext4_iget_extra_inode(struct inode *inode,
EXT4_I(inode)->i_inline_off = 0;
}
+int ext4_get_projid(struct inode *inode, kprojid_t *projid)
+{
+ if (!EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb, EXT4_FEATURE_RO_COMPAT_PROJECT))
+ return -EOPNOTSUPP;
+ *projid = EXT4_I(inode)->i_projid;
+ return 0;
+}
+
struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
{
struct ext4_iloc iloc;
@@ -3881,6 +3889,7 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
int block;
uid_t i_uid;
gid_t i_gid;
+ projid_t i_projid;
inode = iget_locked(sb, ino);
if (!inode)
@@ -3930,12 +3939,18 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
inode->i_mode = le16_to_cpu(raw_inode->i_mode);
i_uid = (uid_t)le16_to_cpu(raw_inode->i_uid_low);
i_gid = (gid_t)le16_to_cpu(raw_inode->i_gid_low);
+ if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_PROJECT))
+ i_projid = (projid_t)le32_to_cpu(raw_inode->i_projid);
+ else
+ i_projid = EXT4_DEF_PROJID;
+
if (!(test_opt(inode->i_sb, NO_UID32))) {
i_uid |= le16_to_cpu(raw_inode->i_uid_high) << 16;
i_gid |= le16_to_cpu(raw_inode->i_gid_high) << 16;
}
i_uid_write(inode, i_uid);
i_gid_write(inode, i_gid);
+ ei->i_projid = make_kprojid(&init_user_ns, i_projid);;
set_nlink(inode, le16_to_cpu(raw_inode->i_links_count));
ext4_clear_state_flags(ei); /* Only relevant on 32-bit archs */
@@ -4165,6 +4180,7 @@ static int ext4_do_update_inode(handle_t *handle,
int need_datasync = 0, set_large_file = 0;
uid_t i_uid;
gid_t i_gid;
+ projid_t i_projid;
spin_lock(&ei->i_raw_lock);
@@ -4177,6 +4193,7 @@ static int ext4_do_update_inode(handle_t *handle,
raw_inode->i_mode = cpu_to_le16(inode->i_mode);
i_uid = i_uid_read(inode);
i_gid = i_gid_read(inode);
+ i_projid = from_kprojid(&init_user_ns, ei->i_projid);
if (!(test_opt(inode->i_sb, NO_UID32))) {
raw_inode->i_uid_low = cpu_to_le16(low_16_bits(i_uid));
raw_inode->i_gid_low = cpu_to_le16(low_16_bits(i_gid));
@@ -4256,6 +4273,18 @@ static int ext4_do_update_inode(handle_t *handle,
}
}
+ BUG_ON(!EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb,
+ EXT4_FEATURE_RO_COMPAT_PROJECT) &&
+ i_projid != EXT4_DEF_PROJID);
+ if (i_projid != EXT4_DEF_PROJID &&
+ (EXT4_INODE_SIZE(inode->i_sb) <= EXT4_GOOD_OLD_INODE_SIZE ||
+ (!EXT4_FITS_IN_INODE(raw_inode, ei, i_projid)))) {
+ spin_unlock(&ei->i_raw_lock);
+ err = -EFBIG;
+ goto out_brelse;
+ }
+ raw_inode->i_projid = cpu_to_le32(i_projid);
+
ext4_inode_csum_set(inode, raw_inode, ei);
spin_unlock(&ei->i_raw_lock);
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 2291923..09e8e55 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -2938,6 +2938,11 @@ static int ext4_link(struct dentry *old_dentry,
if (inode->i_nlink >= EXT4_LINK_MAX)
return -EMLINK;
+ if ((ext4_test_inode_flag(dir, EXT4_INODE_PROJINHERIT)) &&
+ (!projid_eq(EXT4_I(dir)->i_projid,
+ EXT4_I(old_dentry->d_inode)->i_projid)))
+ return -EXDEV;
+
dquot_initialize(dir);
retry:
@@ -3217,6 +3222,11 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry,
int credits;
u8 old_file_type;
+ if ((ext4_test_inode_flag(new_dir, EXT4_INODE_PROJINHERIT)) &&
+ (!projid_eq(EXT4_I(new_dir)->i_projid,
+ EXT4_I(old_dentry->d_inode)->i_projid)))
+ return -EXDEV;
+
dquot_initialize(old.dir);
dquot_initialize(new.dir);
@@ -3395,6 +3405,13 @@ static int ext4_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
u8 new_file_type;
int retval;
+ if ((ext4_test_inode_flag(new_dir, EXT4_INODE_PROJINHERIT)) &&
+ ((!projid_eq(EXT4_I(new_dir)->i_projid,
+ EXT4_I(old_dentry->d_inode)->i_projid)) ||
+ (!projid_eq(EXT4_I(old_dir)->i_projid,
+ EXT4_I(new_dentry->d_inode)->i_projid))))
+ return -EXDEV;
+
dquot_initialize(old.dir);
dquot_initialize(new.dir);
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index bff3427..04c6cc3 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1073,6 +1073,7 @@ static const struct dquot_operations ext4_quota_operations = {
.write_info = ext4_write_info,
.alloc_dquot = dquot_alloc,
.destroy_dquot = dquot_destroy,
+ .get_projid = ext4_get_projid,
};
static const struct quotactl_ops ext4_qctl_operations = {
diff --git a/include/uapi/linux/fs.h b/include/uapi/linux/fs.h
index 3735fa0..fcbf647 100644
--- a/include/uapi/linux/fs.h
+++ b/include/uapi/linux/fs.h
@@ -195,6 +195,7 @@ struct inodes_stat_t {
#define FS_EXTENT_FL 0x00080000 /* Extents */
#define FS_DIRECTIO_FL 0x00100000 /* Use direct i/o */
#define FS_NOCOW_FL 0x00800000 /* Do not cow file */
+#define FS_PROJINHERIT_FL 0x20000000 /* Create with parents projid */
#define FS_RESERVED_FL 0x80000000 /* reserved for ext2 lib */
#define FS_FL_USER_VISIBLE 0x0003DFFF /* User visible flags */
--
1.7.1
--
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