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Date: Thu, 2 Nov 2017 00:24:55 +0300
From: Artem Blagodarenko <artem.blagodarenko@...il.com>
To: linux-ext4@...r.kernel.org
Cc: adilger.kernel@...ger.ca,
Artem Blagodarenko <artem.blagodarenko@...gle.com>
Subject: [RFC PATCH v2 2/2] ext4: Add 64-bit inode number support
Use dirdata to store high bits of 64bit inode
number.
Signed-off-by: Artem Blagodarenko <artem.blagodarenko@...gle.com>
---
fs/ext2/super.c | 6 ++---
fs/ext4/dir.c | 4 +--
fs/ext4/ext4.h | 82 ++++++++++++++++++++++++++++++++++++++++++++++----------
fs/ext4/ialloc.c | 19 ++++++++-----
fs/ext4/namei.c | 53 +++++++++++++++++++++++++++++++-----
fs/ext4/resize.c | 8 +++---
fs/ext4/super.c | 14 +++++++---
7 files changed, 145 insertions(+), 41 deletions(-)
diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index 1458706bd2ec..f6437f559d0a 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -1232,7 +1232,7 @@ void ext2_sync_super(struct super_block *sb, struct ext2_super_block *es,
ext2_clear_super_error(sb);
spin_lock(&EXT2_SB(sb)->s_lock);
es->s_free_blocks_count = cpu_to_le32(ext2_count_free_blocks(sb));
- es->s_free_inodes_count = cpu_to_le32(ext2_count_free_inodes(sb));
+ ext4_set_free_inodes_count(es, ext4_get_free_inodes_count(sb));
es->s_wtime = cpu_to_le32(get_seconds());
/* unlock before we do IO */
spin_unlock(&EXT2_SB(sb)->s_lock);
@@ -1459,9 +1459,9 @@ static int ext2_statfs (struct dentry * dentry, struct kstatfs * buf)
buf->f_bavail = buf->f_bfree - le32_to_cpu(es->s_r_blocks_count);
if (buf->f_bfree < le32_to_cpu(es->s_r_blocks_count))
buf->f_bavail = 0;
- buf->f_files = le32_to_cpu(es->s_inodes_count);
+ buf->f_files = ext4_get_inodes_count(sb);
buf->f_ffree = ext2_count_free_inodes(sb);
- es->s_free_inodes_count = cpu_to_le32(buf->f_ffree);
+ ext4_set_free_inodes_count(sb, buf->f_ffree);
buf->f_namelen = EXT2_NAME_LEN;
fsid = le64_to_cpup((void *)es->s_uuid) ^
le64_to_cpup((void *)es->s_uuid + sizeof(u64));
diff --git a/fs/ext4/dir.c b/fs/ext4/dir.c
index 46fcb8ec47a6..1ed3b2ae1f88 100644
--- a/fs/ext4/dir.c
+++ b/fs/ext4/dir.c
@@ -76,7 +76,7 @@ int __ext4_check_dir_entry(const char *function, unsigned int line,
else if (unlikely(((char *) de - buf) + rlen > size))
error_msg = "directory entry across range";
else if (unlikely(le32_to_cpu(de->inode) >
- le32_to_cpu(EXT4_SB(dir->i_sb)->s_es->s_inodes_count)))
+ ext4_get_inodes_count(dir->i_sb)))
error_msg = "inode out of bounds";
else
return 0;
@@ -382,7 +382,7 @@ struct fname {
__u32 minor_hash;
struct rb_node rb_hash;
struct fname *next;
- __u32 inode;
+ __u64 inode;
__u8 name_len;
__u8 file_type;
char name[0];
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 9a9b01b0956a..a6b385dac61e 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1331,7 +1331,12 @@ struct ext4_super_block {
__le32 s_lpf_ino; /* Location of the lost+found inode */
__le32 s_prj_quota_inum; /* inode for tracking project quota */
__le32 s_checksum_seed; /* crc32c(uuid) if csum_seed set */
- __le32 s_reserved[98]; /* Padding to the end of the block */
+ __le32 s_inodes_count_hi; /* higth part of inode count */
+ __le32 s_free_inodes_count_hi; /* Free inodes count */
+ __le32 s_usr_quota_inum_hi;
+ __le32 s_grp_quota_inum_hi;
+ __le32 s_prj_quota_inum_hi;
+ __le32 s_reserved[93]; /* Padding to the end of the block */
__le32 s_checksum; /* crc32c(superblock) */
};
@@ -1539,18 +1544,6 @@ static inline struct ext4_inode_info *EXT4_I(struct inode *inode)
return container_of(inode, struct ext4_inode_info, vfs_inode);
}
-static inline int ext4_valid_inum(struct super_block *sb, unsigned long ino)
-{
- return ino == EXT4_ROOT_INO ||
- ino == EXT4_USR_QUOTA_INO ||
- ino == EXT4_GRP_QUOTA_INO ||
- ino == EXT4_BOOT_LOADER_INO ||
- ino == EXT4_JOURNAL_INO ||
- ino == EXT4_RESIZE_INO ||
- (ino >= EXT4_FIRST_INO(sb) &&
- ino <= le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count));
-}
-
/*
* Inode dynamic state flags
*/
@@ -1689,6 +1682,7 @@ static inline void ext4_clear_state_flags(struct ext4_inode_info *ei)
#define EXT4_FEATURE_INCOMPAT_LARGEDIR 0x4000 /* >2GB or 3-lvl htree */
#define EXT4_FEATURE_INCOMPAT_INLINE_DATA 0x8000 /* data in inode */
#define EXT4_FEATURE_INCOMPAT_ENCRYPT 0x10000
+#define EXT4_FEATURE_INCOMPAT_INODE64 0x20000
#define EXT4_FEATURE_COMPAT_FUNCS(name, flagname) \
static inline bool ext4_has_feature_##name(struct super_block *sb) \
@@ -1777,6 +1771,8 @@ EXT4_FEATURE_INCOMPAT_FUNCS(csum_seed, CSUM_SEED)
EXT4_FEATURE_INCOMPAT_FUNCS(largedir, LARGEDIR)
EXT4_FEATURE_INCOMPAT_FUNCS(inline_data, INLINE_DATA)
EXT4_FEATURE_INCOMPAT_FUNCS(encrypt, ENCRYPT)
+EXT4_FEATURE_INCOMPAT_FUNCS(inode64, INODE64)
+
#define EXT2_FEATURE_COMPAT_SUPP EXT4_FEATURE_COMPAT_EXT_ATTR
#define EXT2_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \
@@ -1805,6 +1801,7 @@ EXT4_FEATURE_INCOMPAT_FUNCS(encrypt, ENCRYPT)
EXT4_FEATURE_INCOMPAT_INLINE_DATA | \
EXT4_FEATURE_INCOMPAT_ENCRYPT | \
EXT4_FEATURE_INCOMPAT_CSUM_SEED | \
+ EXT4_FEATURE_INCOMPAT_INODE64 | \
EXT4_FEATURE_INCOMPAT_LARGEDIR | \
EXT4_FEATURE_INCOMPAT_DIRDATA)
#define EXT4_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \
@@ -2462,7 +2459,7 @@ extern int ext4fs_dirhash(const char *name, int len, struct
/* ialloc.c */
extern struct inode *__ext4_new_inode(handle_t *, struct inode *, umode_t,
- const struct qstr *qstr, __u32 goal,
+ const struct qstr *qstr, __u64 goal,
uid_t *owner, __u32 i_flags,
int handle_type, unsigned int line_no,
int nblocks);
@@ -2889,6 +2886,63 @@ static inline unsigned int ext4_flex_bg_size(struct ext4_sb_info *sbi)
return 1 << sbi->s_log_groups_per_flex;
}
+static inline unsigned long ext4_get_inodes_count(struct super_block *sb)
+{
+ struct ext4_super_block *es = EXT4_SB(sb)->s_es;
+ unsigned long inodes_count = le32_to_cpu(es->s_inodes_count);
+
+ if (ext4_has_feature_inode64(sb))
+ inodes_count |=
+ (unsigned long)le32_to_cpu(es->s_inodes_count_hi)
+ << 32;
+ return inodes_count;
+}
+
+static inline void ext4_set_inodes_count(struct super_block *sb,
+ unsigned long val)
+{
+ struct ext4_super_block *es = EXT4_SB(sb)->s_es;
+
+ if (ext4_has_feature_inode64(sb))
+ es->s_inodes_count_hi = cpu_to_le32(val >> 32);
+
+ es->s_inodes_count = cpu_to_le32(val);
+}
+
+static inline unsigned long ext4_get_free_inodes_count(struct super_block *sb)
+{
+ struct ext4_super_block *es = EXT4_SB(sb)->s_es;
+ unsigned long inodes_count = le32_to_cpu(es->s_free_inodes_count);
+
+ if (ext4_has_feature_inode64(sb))
+ inodes_count |=
+ (unsigned long)le32_to_cpu(es->s_free_inodes_count_hi)
+ << 32;
+ return inodes_count;
+}
+
+static inline void ext4_set_free_inodes_count(struct super_block *sb,
+ unsigned long val)
+{
+ struct ext4_super_block *es = EXT4_SB(sb)->s_es;
+
+ if (ext4_has_feature_inode64(sb))
+ es->s_free_inodes_count_hi = cpu_to_le32(val >> 32);
+
+ es->s_free_inodes_count = cpu_to_le32(val);
+}
+
+static inline int ext4_valid_inum(struct super_block *sb, unsigned long ino)
+{
+ return ino == EXT4_ROOT_INO ||
+ ino == EXT4_USR_QUOTA_INO ||
+ ino == EXT4_GRP_QUOTA_INO ||
+ ino == EXT4_JOURNAL_INO ||
+ ino == EXT4_RESIZE_INO ||
+ (ino >= EXT4_FIRST_INO(sb) &&
+ ino <= ext4_get_inodes_count(sb));
+}
+
#define ext4_std_error(sb, errno) \
do { \
if ((errno)) \
diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
index ee823022aa34..e23dc4133e84 100644
--- a/fs/ext4/ialloc.c
+++ b/fs/ext4/ialloc.c
@@ -303,7 +303,7 @@ void ext4_free_inode(handle_t *handle, struct inode *inode)
ext4_clear_inode(inode);
es = EXT4_SB(sb)->s_es;
- if (ino < EXT4_FIRST_INO(sb) || ino > le32_to_cpu(es->s_inodes_count)) {
+ if (ino < EXT4_FIRST_INO(sb) || ino > ext4_get_inodes_count(sb)) {
ext4_error(sb, "reserved or nonexistent inode %lu", ino);
goto error_return;
}
@@ -770,7 +770,7 @@ static int find_inode_bit(struct super_block *sb, ext4_group_t group,
*/
struct inode *__ext4_new_inode(handle_t *handle, struct inode *dir,
umode_t mode, const struct qstr *qstr,
- __u32 goal, uid_t *owner, __u32 i_flags,
+ __u64 goal, uid_t *owner, __u32 i_flags,
int handle_type, unsigned int line_no,
int nblocks)
{
@@ -887,7 +887,7 @@ struct inode *__ext4_new_inode(handle_t *handle, struct inode *dir,
if (!goal)
goal = sbi->s_inode_goal;
- if (goal && goal <= le32_to_cpu(sbi->s_es->s_inodes_count)) {
+ if (goal && goal <= ext4_get_inodes_count(sb)) {
group = (goal - 1) / EXT4_INODES_PER_GROUP(sb);
ino = (goal - 1) % EXT4_INODES_PER_GROUP(sb);
ret2 = 0;
@@ -1149,6 +1149,11 @@ struct inode *__ext4_new_inode(handle_t *handle, struct inode *dir,
__le32 gen = cpu_to_le32(inode->i_generation);
csum = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&inum,
sizeof(inum));
+ if (inode->i_ino >> 32) {
+ inum = cpu_to_le32(inode->i_ino >> 32);
+ csum = ext4_chksum(sbi, sbi->s_csum_seed,
+ (__u8 *)&inum, sizeof(inum));
+ }
ei->i_csum_seed = ext4_chksum(sbi, csum, (__u8 *)&gen,
sizeof(gen));
}
@@ -1226,7 +1231,7 @@ struct inode *__ext4_new_inode(handle_t *handle, struct inode *dir,
/* Verify that we are loading a valid orphan from disk */
struct inode *ext4_orphan_get(struct super_block *sb, unsigned long ino)
{
- unsigned long max_ino = le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count);
+ unsigned long max_ino = ext4_get_inodes_count(sb);
ext4_group_t block_group;
int bit;
struct buffer_head *bitmap_bh = NULL;
@@ -1330,9 +1335,9 @@ unsigned long ext4_count_free_inodes(struct super_block *sb)
bitmap_count += x;
}
brelse(bitmap_bh);
- printk(KERN_DEBUG "ext4_count_free_inodes: "
- "stored = %u, computed = %lu, %lu\n",
- le32_to_cpu(es->s_free_inodes_count), desc_count, bitmap_count);
+ printk(KERN_DEBUG "ext4_count_free_inodes:\n"
+ "stored = %lu, computed = %lu, %lu\n",
+ ext4_get_inodes_count(sb), desc_count, bitmap_count);
return desc_count;
#else
desc_count = 0;
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index b09e73100e14..9671732e478f 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -1574,11 +1574,39 @@ static struct dentry *ext4_lookup(struct inode *dir, struct dentry *dentry, unsi
return (struct dentry *) bh;
inode = NULL;
if (bh) {
- __u32 ino = le32_to_cpu(de->inode);
+ unsigned long ino;
+
+ ino = le32_to_cpu(de->inode);
+ if (ext4_has_feature_inode64(dir->i_sb) &&
+ (de->file_type & EXT4_DIRENT_INODE)) {
+ char *data = &de->name[de->name_len];
+
+ if (de->file_type & EXT4_DIRENT_LUFID) {
+ /* skip LUFID record if present */
+ data += *data;
+ }
+
+ if (data > &de->name[de->rec_len]) {
+ EXT4_ERROR_INODE(dir,
+ "corrupted dirdata entry\n");
+ return ERR_PTR(-EFSCORRUPTED);
+ }
+
+ if (*data == sizeof(__u32)) {
+ __le32 ino_hi;
+
+ memcpy(&ino_hi, ++data, sizeof(__u32));
+ ino |= (__u64)le32_to_cpu(ino_hi) << 32;
+ } else {
+ EXT4_ERROR_INODE(dir,
+ "corrupted dirdata inode number\n");
+ return ERR_PTR(-EFSCORRUPTED);
+ }
+ }
brelse(bh);
if (!ext4_valid_inum(dir->i_sb, ino)) {
- EXT4_ERROR_INODE(dir, "bad inode number: %u", ino);
+ EXT4_ERROR_INODE(dir, "bad inode number: %lu", ino);
return ERR_PTR(-EFSCORRUPTED);
}
if (unlikely(ino == dir->i_ino)) {
@@ -1589,7 +1617,7 @@ static struct dentry *ext4_lookup(struct inode *dir, struct dentry *dentry, unsi
inode = ext4_iget_normal(dir->i_sb, ino);
if (inode == ERR_PTR(-ESTALE)) {
EXT4_ERROR_INODE(dir,
- "deleted inode referenced: %u",
+ "deleted inode referenced: %lu",
ino);
return ERR_PTR(-EFSCORRUPTED);
}
@@ -1893,7 +1921,7 @@ static int add_dirent_to_buf(handle_t *handle,
unsigned int blocksize = dir->i_sb->s_blocksize;
int csum_size = 0;
unsigned short reclen, dotdot_reclen = 0;
- int err, dlen = 0;
+ int err, dlen = 0, data_offset = 0;
bool is_dotdot = false, write_short_dotdot = false;
unsigned char *data;
int namelen = dentry->d_name.len;
@@ -1939,8 +1967,19 @@ static int add_dirent_to_buf(handle_t *handle,
/* If we're writing short form of "dotdot", don't add data section */
if (data && !write_short_dotdot) {
de->name[namelen] = 0;
- memcpy(&de->name[namelen + 1], data, *(char *)data);
+ memcpy(&de->name[namelen + 1], data, *data);
de->file_type |= EXT4_DIRENT_LUFID;
+ data_offset = *data;
+ }
+
+ if (inode) {
+ __u32 *i_ino_hi;
+
+ de->name[namelen + 1 + data_offset] = 5;
+ i_ino_hi = (__u32 *)&de->name[namelen + 1 + data_offset + 1];
+ *i_ino_hi = cpu_to_le32((__u32)(inode->i_ino >> 32));
+ de->file_type |= EXT4_DIRENT_INODE;
+ de->inode = cpu_to_le32(inode->i_ino & 0xFFFFFFFF);
}
/*
@@ -2045,8 +2084,8 @@ static int make_indexed_dir(handle_t *handle, struct ext4_filename *fname,
entries = root->entries;
dx_set_block(entries, 1);
dx_set_count(entries, 1);
- dx_set_limit(entries, dx_root_limit(dir,
- fde, sizeof(root->info)));
+ dx_set_limit(entries, dx_root_limit(dir, (struct ext4_dir_entry_2 *)fde,
+ sizeof(root->info)));
/* Initialize as for dx_probe */
fname->hinfo.hash_version = root->info.hash_version;
diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
index 035cd3f4785e..d0d5acd1a70d 100644
--- a/fs/ext4/resize.c
+++ b/fs/ext4/resize.c
@@ -1337,10 +1337,10 @@ static void ext4_update_super(struct super_block *sb,
ext4_blocks_count_set(es, ext4_blocks_count(es) + blocks_count);
ext4_free_blocks_count_set(es, ext4_free_blocks_count(es) + free_blocks);
- le32_add_cpu(&es->s_inodes_count, EXT4_INODES_PER_GROUP(sb) *
- flex_gd->count);
- le32_add_cpu(&es->s_free_inodes_count, EXT4_INODES_PER_GROUP(sb) *
- flex_gd->count);
+ ext4_set_inodes_count(sb, ext4_get_inodes_count(sb) +
+ EXT4_INODES_PER_GROUP(sb) * flex_gd->count);
+ ext4_set_free_inodes_count(sb, ext4_get_free_inodes_count(sb) +
+ EXT4_INODES_PER_GROUP(sb) * flex_gd->count);
ext4_debug("free blocks count %llu", ext4_free_blocks_count(es));
/*
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index ead9406d9cff..a06252f9aada 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -3489,6 +3489,12 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
goto cantfind_ext4;
}
+ if (ext4_has_feature_inode64(sb) &&
+ (sizeof(u64) != sizeof(unsigned long))) {
+ ext4_msg(sb, KERN_ERR, "64 bit inodes need 64 bit kernel.");
+ goto failed_mount;
+ }
+
/* Load the checksum driver */
if (ext4_has_feature_metadata_csum(sb) ||
ext4_has_feature_ea_inode(sb)) {
@@ -4248,7 +4254,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
GFP_KERNEL);
if (!err) {
unsigned long freei = ext4_count_free_inodes(sb);
- sbi->s_es->s_free_inodes_count = cpu_to_le32(freei);
+ ext4_set_free_inodes_count(sb, freei);
err = percpu_counter_init(&sbi->s_freeinodes_counter, freei,
GFP_KERNEL);
}
@@ -4705,9 +4711,9 @@ static int ext4_commit_super(struct super_block *sb, int sync)
EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive(
&EXT4_SB(sb)->s_freeclusters_counter)));
if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeinodes_counter))
- es->s_free_inodes_count =
- cpu_to_le32(percpu_counter_sum_positive(
- &EXT4_SB(sb)->s_freeinodes_counter));
+ ext4_set_free_inodes_count(sb,
+ cpu_to_le32(percpu_counter_sum_positive(
+ &EXT4_SB(sb)->s_freeinodes_counter)));
BUFFER_TRACE(sbh, "marking dirty");
ext4_superblock_csum_set(sb);
if (sync)
--
2.13.5 (Apple Git-94)
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