Adds project ID support for ext4
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 <at> ddn.com>
---
Index: linux.git/fs/ext4/ialloc.c
===================================================================
--- linux.git.orig/fs/ext4/ialloc.c
+++ linux.git/fs/ext4/ialloc.c
@@ -756,6 +756,16 @@ struct inode *__ext4_new_inode(handle_t
inode->i_gid = dir->i_gid;
} else
inode_init_owner(inode, dir, mode);
+#ifdef CONFIG_QUOTA_PROJECT
+ if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_PROJECT)) {
+ if (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);
+ }
+ }
+#endif
dquot_initialize(inode);
if (!goal)
Index: linux.git/fs/ext4/ext4.h
===================================================================
--- linux.git.orig/fs/ext4/ext4.h
+++ linux.git/fs/ext4/ext4.h
@@ -386,16 +386,18 @@ 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))
@@ -443,6 +445,7 @@ 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 */
};
@@ -695,6 +698,7 @@ 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 {
@@ -943,6 +947,9 @@ struct ext4_inode_info {
/* Precomputed uuid+inum+igen checksum for seeding inode checksums */
__u32 i_csum_seed;
+#ifdef CONFIG_QUOTA_PROJECT
+ kprojid_t i_projid;
+#endif
};
/*
@@ -1525,6 +1532,7 @@ static inline void ext4_clear_state_flag
* GDT_CSUM bits are mutually exclusive.
*/
#define EXT4_FEATURE_RO_COMPAT_METADATA_CSUM 0x0400
+#define EXT4_FEATURE_RO_COMPAT_PROJECT 0x1000 /* Project quota */
#define EXT4_FEATURE_INCOMPAT_COMPRESSION 0x0001
#define EXT4_FEATURE_INCOMPAT_FILETYPE 0x0002
@@ -1574,7 +1582,8 @@ static inline void ext4_clear_state_flag
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
@@ -1582,6 +1591,11 @@ static inline void ext4_clear_state_flag
#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
/*
@@ -2133,6 +2147,9 @@ extern int ext4_zero_partial_blocks(hand
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);
+#ifdef CONFIG_QUOTA_PROJECT
+extern int ext4_get_projid(struct inode *inode, kprojid_t *projid);
+#endif
extern void ext4_da_update_reserve_space(struct inode *inode,
int used, int quota_claim);
Index: linux.git/fs/ext4/inode.c
===================================================================
--- linux.git.orig/fs/ext4/inode.c
+++ linux.git/fs/ext4/inode.c
@@ -4026,6 +4026,47 @@ static inline void ext4_iget_extra_inode
EXT4_I(inode)->i_inline_off = 0;
}
+#ifdef CONFIG_QUOTA_PROJECT
+static int ext4_inode_projid_get(struct inode *inode, struct ext4_inode *raw,
+ struct ext4_inode_info *ei, projid_t *projid)
+{
+ BUG_ON(!EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb,
+ EXT4_FEATURE_RO_COMPAT_PROJECT));
+
+ if (EXT4_INODE_SIZE(inode->i_sb) > EXT4_GOOD_OLD_INODE_SIZE &&
+ EXT4_FITS_IN_INODE(raw, ei, i_projid)) {
+ *projid = (projid_t)le32_to_cpu(raw->i_projid);
+ return 0;
+ }
+ return -EFBIG;
+}
+
+static int ext4_inode_projid_set(struct inode *inode, struct ext4_inode *raw,
+ struct ext4_inode_info *ei, projid_t projid)
+{
+ BUG_ON(!EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb,
+ EXT4_FEATURE_RO_COMPAT_PROJECT));
+
+ if (EXT4_INODE_SIZE(inode->i_sb) > EXT4_GOOD_OLD_INODE_SIZE &&
+ EXT4_FITS_IN_INODE(raw, ei, i_projid)) {
+ raw->i_projid = cpu_to_le32(projid);
+ return 0;
+ }
+ return -EFBIG;
+}
+
+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 -ENOTSUPP;
+ }
+
+ *projid = EXT4_I(inode)->i_projid;
+ return 0;
+}
+#endif
+
struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
{
struct ext4_iloc iloc;
@@ -4037,6 +4078,9 @@ struct inode *ext4_iget(struct super_blo
int block;
uid_t i_uid;
gid_t i_gid;
+#ifdef CONFIG_QUOTA_PROJECT
+ projid_t i_projid = 0;
+#endif
inode = iget_locked(sb, ino);
if (!inode)
@@ -4087,12 +4131,26 @@ struct inode *ext4_iget(struct super_blo
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);
+#ifdef CONFIG_QUOTA_PROJECT
+ if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_PROJECT)) {
+ ret = ext4_inode_projid_get(inode, raw_inode, ei, &i_projid);
+ if (ret) {
+ EXT4_ERROR_INODE(inode, "failed to get project ID");
+ goto bad_inode;
+ }
+ }
+#endif
+
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);
+#ifdef CONFIG_QUOTA_PROJECT
+ if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_PROJECT))
+ ei->i_projid = make_kprojid(&init_user_ns, i_projid);;
+#endif
set_nlink(inode, le16_to_cpu(raw_inode->i_links_count));
ext4_clear_state_flags(ei); /* Only relevant on 32-bit archs */
@@ -4315,6 +4373,9 @@ static int ext4_do_update_inode(handle_t
int need_datasync = 0, set_large_file = 0;
uid_t i_uid;
gid_t i_gid;
+#ifdef CONFIG_QUOTA_PROJECT
+ projid_t i_projid = 0;
+#endif
spin_lock(&ei->i_raw_lock);
@@ -4327,6 +4388,10 @@ static int ext4_do_update_inode(handle_t
raw_inode->i_mode = cpu_to_le16(inode->i_mode);
i_uid = i_uid_read(inode);
i_gid = i_gid_read(inode);
+#ifdef CONFIG_QUOTA_PROJECT
+ if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_PROJECT))
+ i_projid = from_kprojid(&init_user_ns, ei->i_projid);
+#endif
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));
@@ -4356,7 +4421,8 @@ static int ext4_do_update_inode(handle_t
EXT4_INODE_SET_XTIME(i_atime, inode, raw_inode);
EXT4_EINODE_SET_XTIME(i_crtime, ei, raw_inode);
- if (ext4_inode_blocks_set(handle, raw_inode, ei)) {
+ err = ext4_inode_blocks_set(handle, raw_inode, ei);
+ if (err) {
spin_unlock(&ei->i_raw_lock);
goto out_brelse;
}
@@ -4407,6 +4473,16 @@ static int ext4_do_update_inode(handle_t
ext4_inode_csum_set(inode, raw_inode, ei);
+#ifdef CONFIG_QUOTA_PROJECT
+ if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_PROJECT)) {
+ err = ext4_inode_projid_set(inode, raw_inode, ei, i_projid);
+ if (err) {
+ spin_unlock(&ei->i_raw_lock);
+ goto out_brelse;
+ }
+ }
+#endif
+
spin_unlock(&ei->i_raw_lock);
BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata");
Index: linux.git/fs/ext4/super.c
===================================================================
--- linux.git.orig/fs/ext4/super.c
+++ linux.git/fs/ext4/super.c
@@ -1080,6 +1080,9 @@ static const struct dquot_operations ext
.write_info = ext4_write_info,
.alloc_dquot = dquot_alloc,
.destroy_dquot = dquot_destroy,
+#ifdef CONFIG_QUOTA_PROJECT
+ .get_projid = ext4_get_projid,
+#endif
};
static const struct quotactl_ops ext4_qctl_operations = {
Index: linux.git/fs/ext4/namei.c
===================================================================
--- linux.git.orig/fs/ext4/namei.c
+++ linux.git/fs/ext4/namei.c
@@ -2951,11 +2951,21 @@ static int ext4_link(struct dentry *old_
{
handle_t *handle;
struct inode *inode = old_dentry->d_inode;
+ struct super_block *sb = dir->i_sb;
int err, retries = 0;
if (inode->i_nlink >= EXT4_LINK_MAX)
return -EMLINK;
+#ifdef CONFIG_QUOTA_PROJECT
+ if ((EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_PROJECT)) &&
+ (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;
+ }
+#endif
+
dquot_initialize(dir);
retry:
@@ -3191,8 +3201,18 @@ static int ext4_rename(struct inode *old
.dentry = new_dentry,
.inode = new_dentry->d_inode,
};
+ struct super_block *sb = new_dir->i_sb;
int retval;
+#ifdef CONFIG_QUOTA_PROJECT
+ if ((EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_PROJECT)) &&
+ (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;
+ }
+#endif
+
dquot_initialize(old.dir);
dquot_initialize(new.dir);
--
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