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Message-Id: <20171130151753.24986-3-artem.blagodarenko@gmail.com>
Date: Thu, 30 Nov 2017 18:17:52 +0300
From: Artem Blagodarenko <artem.blagodarenko@...il.com>
To: linux-ext4@...r.kernel.org
Cc: adilger.kernel@...ger.ca, Andreas Dilger <andreas.dilger@...el.com>
Subject: [PATCH v3 2/3] ext4: dirdata feature
From: Andreas Dilger <andreas.dilger@...el.com>
This patch implements feature which allows ext4 fs users (e.g. Lustre)
to store data in ext4 dirent. Data is stored in ext4 dirent after
file-name, this space is accounted in de->rec_len.
Flag EXT4_DIRENT_LUFID added to d_type if extra data
is present.
Make use of dentry->d_fsdata to pass fid to ext4. so no
changes in ext4_add_entry() interface required.
Signed-off-by: Andreas Dilger <andreas.dilger@...el.com>
Signed-off-by: Artem Blagodarenko <artem.blagodarenko@...il.com>
---
fs/ext4/dir.c | 17 ++++---
fs/ext4/ext4.h | 99 ++++++++++++++++++++++++++++++++++++++---
fs/ext4/inline.c | 18 ++++----
fs/ext4/namei.c | 132 ++++++++++++++++++++++++++++++++++++++++++-------------
fs/ext4/super.c | 3 +-
5 files changed, 218 insertions(+), 51 deletions(-)
diff --git a/fs/ext4/dir.c b/fs/ext4/dir.c
index b04e882179c6..0c4dddb0f07a 100644
--- a/fs/ext4/dir.c
+++ b/fs/ext4/dir.c
@@ -67,11 +67,11 @@ int __ext4_check_dir_entry(const char *function, unsigned int line,
const int rlen = ext4_rec_len_from_disk(de->rec_len,
dir->i_sb->s_blocksize);
- if (unlikely(rlen < EXT4_DIR_REC_LEN(1)))
+ if (unlikely(rlen < EXT4_DIR_NAME_LEN(1)))
error_msg = "rec_len is smaller than minimal";
else if (unlikely(rlen % 4 != 0))
error_msg = "rec_len % 4 != 0";
- else if (unlikely(rlen < EXT4_DIR_REC_LEN(de->name_len)))
+ else if (unlikely(rlen < EXT4_DIR_REC_LEN(de)))
error_msg = "rec_len is too small for name_len";
else if (unlikely(((char *) de - buf) + rlen > size))
error_msg = "directory entry across range";
@@ -218,7 +218,8 @@ static int ext4_readdir(struct file *file, struct dir_context *ctx)
* failure will be detected in the
* dirent test below. */
if (ext4_rec_len_from_disk(de->rec_len,
- sb->s_blocksize) < EXT4_DIR_REC_LEN(1))
+ sb->s_blocksize) <
+ EXT4_DIR_NAME_LEN(1))
break;
i += ext4_rec_len_from_disk(de->rec_len,
sb->s_blocksize);
@@ -441,12 +442,18 @@ int ext4_htree_store_dirent(struct file *dir_file, __u32 hash,
struct fname *fname, *new_fn;
struct dir_private_info *info;
int len;
+ int extra_data = 0;
info = dir_file->private_data;
p = &info->root.rb_node;
/* Create and allocate the fname structure */
- len = sizeof(struct fname) + ent_name->len + 1;
+ if (dirent->file_type & ~EXT4_FT_MASK)
+ extra_data = ext4_get_dirent_data_len(dirent);
+
+ len = sizeof(struct fname) + dirent->name_len + extra_data + 1;
+
+
new_fn = kzalloc(len, GFP_KERNEL);
if (!new_fn)
return -ENOMEM;
@@ -455,7 +462,7 @@ int ext4_htree_store_dirent(struct file *dir_file, __u32 hash,
new_fn->inode = le32_to_cpu(dirent->inode);
new_fn->name_len = ent_name->len;
new_fn->file_type = dirent->file_type;
- memcpy(new_fn->name, ent_name->name, ent_name->len);
+ memcpy(new_fn->name, ent_name->name, ent_name->len + extra_data);
new_fn->name[ent_name->len] = 0;
while (*p) {
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index e2abe01c8c6b..3678657d8e47 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1111,6 +1111,7 @@ struct ext4_inode_info {
* Mount flags set via mount options or defaults
*/
#define EXT4_MOUNT_NO_MBCACHE 0x00001 /* Do not use mbcache */
+#define EXT4_MOUNT_DIRDATA 0x00002 /* Data in directory entries*/
#define EXT4_MOUNT_GRPID 0x00004 /* Create files with directory's group */
#define EXT4_MOUNT_DEBUG 0x00008 /* Some debugging messages */
#define EXT4_MOUNT_ERRORS_CONT 0x00010 /* Continue on errors */
@@ -1804,7 +1805,8 @@ EXT4_FEATURE_INCOMPAT_FUNCS(encrypt, ENCRYPT)
EXT4_FEATURE_INCOMPAT_INLINE_DATA | \
EXT4_FEATURE_INCOMPAT_ENCRYPT | \
EXT4_FEATURE_INCOMPAT_CSUM_SEED | \
- EXT4_FEATURE_INCOMPAT_LARGEDIR)
+ EXT4_FEATURE_INCOMPAT_LARGEDIR | \
+ EXT4_FEATURE_INCOMPAT_DIRDATA)
#define EXT4_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \
EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \
EXT4_FEATURE_RO_COMPAT_GDT_CSUM| \
@@ -1965,6 +1967,56 @@ struct ext4_dir_entry_tail {
#define EXT4_FT_DIR_CSUM 0xDE
+#define EXT4_FT_MASK 0xf
+
+#if EXT4_FT_MAX > EXT4_FT_MASK
+#error "conflicting EXT4_FT_MAX and EXT4_FT_MASK"
+#endif
+
+/*
+ * d_type has 4 unused bits, so it can hold four types data. these different
+ * type of data (e.g. lustre data, high 32 bits of 64-bit inode number) can be
+ * stored, in flag order, after file-name in ext4 dirent.
+ */
+/*
+ * this flag is added to d_type if ext4 dirent has extra data after
+ * filename. this data length is variable and length is stored in first byte
+ * of data. data start after filename NUL byte.
+ * This is used by Lustre FS.
+ */
+#define EXT4_DIRENT_LUFID 0x10
+#define EXT4_DIRENT_INODE 0x20
+#define DIRENT_INODE_LEN 2
+
+#define EXT4_LUFID_MAGIC 0xAD200907UL
+
+struct ext4_dirent_data_header {
+ /* length of this header + the whole data blob */
+ __u8 ddh_length;
+} __packed;
+
+struct ext4_dirent_lufid {
+ struct ext4_dirent_data_header dl_header; /* 1 + 16n */
+ __u8 dl_data[0];
+} __packed;
+
+struct ext4_dentry_param {
+ __u32 edp_magic; /* EXT4_LUFID_MAGIC */
+ struct ext4_dirent_lufid edp_lufid;
+} __packed;
+
+static inline struct ext4_dirent_data_header *
+ ext4_dentry_get_data(struct super_block *sb,
+ struct ext4_dentry_param *p)
+{
+ if (!ext4_has_feature_dirdata(sb))
+ return NULL;
+ if (p && p->edp_magic == EXT4_LUFID_MAGIC)
+ return &p->edp_lufid.dl_header;
+ else
+ return NULL;
+}
+
/*
* EXT4_DIR_PAD defines the directory entries boundaries
*
@@ -1972,8 +2024,14 @@ struct ext4_dir_entry_tail {
*/
#define EXT4_DIR_PAD 4
#define EXT4_DIR_ROUND (EXT4_DIR_PAD - 1)
-#define EXT4_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT4_DIR_ROUND) & \
+
+/* the name + inode data without any extra dirdata */
+#define EXT4_DIR_NAME_LEN(name_len) (((name_len) + 8 + EXT4_DIR_ROUND) & \
~EXT4_DIR_ROUND)
+/* the total size of the dirent including any extra data */
+#define EXT4_DIR_REC_LEN(de) (EXT4_DIR_NAME_LEN(de->name_len +\
+ ext4_get_dirent_data_len(de)))
+
#define EXT4_MAX_REC_LEN ((1<<16)-1)
/*
@@ -2376,7 +2434,10 @@ extern int ext4_find_dest_de(struct inode *dir, struct inode *inode,
struct buffer_head *bh,
void *buf, int buf_size,
struct ext4_filename *fname,
- struct ext4_dir_entry_2 **dest_de);
+ struct ext4_dir_entry_2 **dest_de,
+ bool is_dotdot,
+ bool *write_short_dotdot,
+ unsigned short dotdot_reclen);
void ext4_insert_dentry(struct inode *inode,
struct ext4_dir_entry_2 *de,
int buf_size,
@@ -2392,10 +2453,16 @@ static const unsigned char ext4_filetype_table[] = {
static inline unsigned char get_dtype(struct super_block *sb, int filetype)
{
- if (!ext4_has_feature_filetype(sb) || filetype >= EXT4_FT_MAX)
+ int fl_index = filetype & EXT4_FT_MASK;
+
+ if (!ext4_has_feature_filetype(sb) || fl_index >= EXT4_FT_MAX)
return DT_UNKNOWN;
- return ext4_filetype_table[filetype];
+ if (!test_opt(sb, DIRDATA))
+ return (ext4_filetype_table[fl_index]);
+
+ return (ext4_filetype_table[fl_index]) |
+ (filetype & ~EXT4_FT_MASK);
}
extern int ext4_check_all_de(struct inode *dir, struct buffer_head *bh,
void *buf, int buf_size);
@@ -3271,6 +3338,28 @@ static inline void ext4_clear_io_unwritten_flag(ext4_io_end_t *io_end)
extern const struct iomap_ops ext4_iomap_ops;
+/*
+ * Compute the total directory entry data length.
+ * This includes the filename and an implicit NUL terminator (always present),
+ * and optional extensions. Each extension has a bit set in the high 4 bits of
+ * de->file_type, and the extension length is the first byte in each entry.
+ */
+static inline int ext4_get_dirent_data_len(struct ext4_dir_entry_2 *de)
+{
+ char *len = de->name + de->name_len + 1 /* NUL terminator */;
+ int dlen = 0;
+ __u8 extra_data_flags = (de->file_type & ~EXT4_FT_MASK) >> 4;
+
+ while (extra_data_flags) {
+ if (extra_data_flags & 1) {
+ dlen += *len + (dlen == 0);
+ len += *len;
+ }
+ extra_data_flags >>= 1;
+ }
+ return dlen;
+}
+
#endif /* __KERNEL__ */
#define EFSBADCRC EBADMSG /* Bad CRC detected */
diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c
index 28c5c3abddb3..666891dc03cd 100644
--- a/fs/ext4/inline.c
+++ b/fs/ext4/inline.c
@@ -1026,7 +1026,7 @@ static int ext4_add_dirent_to_inline(handle_t *handle,
struct ext4_dir_entry_2 *de;
err = ext4_find_dest_de(dir, inode, iloc->bh, inline_start,
- inline_size, fname, &de);
+ inline_size, fname, &de, 0, NULL, 0);
if (err)
return err;
@@ -1103,7 +1103,7 @@ static int ext4_update_inline_dir(handle_t *handle, struct inode *dir,
int old_size = EXT4_I(dir)->i_inline_size - EXT4_MIN_INLINE_DATA_SIZE;
int new_size = get_max_inline_xattr_value_size(dir, iloc);
- if (new_size - old_size <= EXT4_DIR_REC_LEN(1))
+ if (new_size - old_size <= EXT4_DIR_NAME_LEN(1))
return -ENOSPC;
ret = ext4_update_inline_data(handle, dir,
@@ -1384,8 +1384,8 @@ int htree_inlinedir_to_tree(struct file *dir_file,
fake.name_len = 1;
strcpy(fake.name, ".");
fake.rec_len = ext4_rec_len_to_disk(
- EXT4_DIR_REC_LEN(fake.name_len),
- inline_size);
+ EXT4_DIR_NAME_LEN(fake.name_len),
+ inline_size);
ext4_set_de_type(inode->i_sb, &fake, S_IFDIR);
de = &fake;
pos = EXT4_INLINE_DOTDOT_OFFSET;
@@ -1394,8 +1394,8 @@ int htree_inlinedir_to_tree(struct file *dir_file,
fake.name_len = 2;
strcpy(fake.name, "..");
fake.rec_len = ext4_rec_len_to_disk(
- EXT4_DIR_REC_LEN(fake.name_len),
- inline_size);
+ EXT4_DIR_NAME_LEN(fake.name_len),
+ inline_size);
ext4_set_de_type(inode->i_sb, &fake, S_IFDIR);
de = &fake;
pos = EXT4_INLINE_DOTDOT_SIZE;
@@ -1492,8 +1492,8 @@ int ext4_read_inline_dir(struct file *file,
* So we will use extra_offset and extra_size to indicate them
* during the inline dir iteration.
*/
- dotdot_offset = EXT4_DIR_REC_LEN(1);
- dotdot_size = dotdot_offset + EXT4_DIR_REC_LEN(2);
+ dotdot_offset = EXT4_DIR_NAME_LEN(1);
+ dotdot_size = dotdot_offset + EXT4_DIR_NAME_LEN(2);
extra_offset = dotdot_size - EXT4_INLINE_DOTDOT_SIZE;
extra_size = extra_offset + inline_size;
@@ -1528,7 +1528,7 @@ int ext4_read_inline_dir(struct file *file,
* failure will be detected in the
* dirent test below. */
if (ext4_rec_len_from_disk(de->rec_len, extra_size)
- < EXT4_DIR_REC_LEN(1))
+ < EXT4_DIR_NAME_LEN(1))
break;
i += ext4_rec_len_from_disk(de->rec_len,
extra_size);
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 7c649cf2b630..67edab5572d8 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -239,7 +239,8 @@ static unsigned dx_get_count(struct dx_entry *entries);
static unsigned dx_get_limit(struct dx_entry *entries);
static void dx_set_count(struct dx_entry *entries, unsigned value);
static void dx_set_limit(struct dx_entry *entries, unsigned value);
-static unsigned dx_root_limit(struct inode *dir, unsigned infosize);
+static inline unsigned int dx_root_limit(struct inode *dir,
+ struct ext4_dir_entry_2 *dot_de, unsigned int infosize);
static unsigned dx_node_limit(struct inode *dir);
static struct dx_frame *dx_probe(struct ext4_filename *fname,
struct inode *dir,
@@ -552,10 +553,15 @@ static inline void dx_set_limit(struct dx_entry *entries, unsigned value)
((struct dx_countlimit *) entries)->limit = cpu_to_le16(value);
}
-static inline unsigned dx_root_limit(struct inode *dir, unsigned infosize)
+static inline unsigned int dx_root_limit(struct inode *dir,
+ struct ext4_dir_entry_2 *dot_de, unsigned int infosize)
{
- unsigned entry_space = dir->i_sb->s_blocksize - EXT4_DIR_REC_LEN(1) -
- EXT4_DIR_REC_LEN(2) - infosize;
+ struct ext4_dir_entry_2 *dotdot_de;
+ unsigned int entry_space;
+
+ dotdot_de = ext4_next_entry(dot_de, dir->i_sb->s_blocksize);
+ entry_space = dir->i_sb->s_blocksize - EXT4_DIR_REC_LEN(dot_de) -
+ EXT4_DIR_REC_LEN(dotdot_de) - infosize;
if (ext4_has_metadata_csum(dir->i_sb))
entry_space -= sizeof(struct dx_tail);
@@ -564,7 +570,8 @@ static inline unsigned dx_root_limit(struct inode *dir, unsigned infosize)
static inline unsigned dx_node_limit(struct inode *dir)
{
- unsigned entry_space = dir->i_sb->s_blocksize - EXT4_DIR_REC_LEN(0);
+ unsigned int entry_space = dir->i_sb->s_blocksize -
+ EXT4_DIR_NAME_LEN(0);
if (ext4_has_metadata_csum(dir->i_sb))
entry_space -= sizeof(struct dx_tail);
@@ -676,7 +683,7 @@ static struct stats dx_show_leaf(struct inode *dir,
(unsigned) ((char *) de - base));
#endif
}
- space += EXT4_DIR_REC_LEN(de->name_len);
+ space += EXT4_DIR_REC_LEN(de);
names++;
}
de = ext4_next_entry(de, size);
@@ -984,7 +991,7 @@ static int htree_dirblock_to_tree(struct file *dir_file,
de = (struct ext4_dir_entry_2 *) bh->b_data;
top = (struct ext4_dir_entry_2 *) ((char *) de +
dir->i_sb->s_blocksize -
- EXT4_DIR_REC_LEN(0));
+ EXT4_DIR_NAME_LEN(0));
#ifdef CONFIG_EXT4_FS_ENCRYPTION
/* Check if the directory is encrypted */
if (ext4_encrypted_inode(dir)) {
@@ -1567,6 +1574,7 @@ static struct dentry *ext4_lookup(struct inode *dir, struct dentry *dentry, unsi
inode = NULL;
if (bh) {
__u32 ino = le32_to_cpu(de->inode);
+
brelse(bh);
if (!ext4_valid_inum(dir->i_sb, ino)) {
EXT4_ERROR_INODE(dir, "bad inode number: %u", ino);
@@ -1635,7 +1643,7 @@ dx_move_dirents(char *from, char *to, struct dx_map_entry *map, int count,
while (count--) {
struct ext4_dir_entry_2 *de = (struct ext4_dir_entry_2 *)
(from + (map->offs<<2));
- rec_len = EXT4_DIR_REC_LEN(de->name_len);
+ rec_len = EXT4_DIR_REC_LEN(de);
memcpy (to, de, rec_len);
((struct ext4_dir_entry_2 *) to)->rec_len =
ext4_rec_len_to_disk(rec_len, blocksize);
@@ -1659,7 +1667,7 @@ static struct ext4_dir_entry_2* dx_pack_dirents(char *base, unsigned blocksize)
while ((char*)de < base + blocksize) {
next = ext4_next_entry(de, blocksize);
if (de->inode && de->name_len) {
- rec_len = EXT4_DIR_REC_LEN(de->name_len);
+ rec_len = EXT4_DIR_REC_LEN(de);
if (de > to)
memmove(to, de, rec_len);
to->rec_len = ext4_rec_len_to_disk(rec_len, blocksize);
@@ -1790,10 +1798,13 @@ int ext4_find_dest_de(struct inode *dir, struct inode *inode,
struct buffer_head *bh,
void *buf, int buf_size,
struct ext4_filename *fname,
- struct ext4_dir_entry_2 **dest_de)
+ struct ext4_dir_entry_2 **dest_de,
+ bool is_dotdot,
+ bool *write_short_dotdot,
+ unsigned short dotdot_reclen)
{
struct ext4_dir_entry_2 *de;
- unsigned short reclen = EXT4_DIR_REC_LEN(fname_len(fname));
+ unsigned short reclen = EXT4_DIR_NAME_LEN(fname_len(fname));
int nlen, rlen;
unsigned int offset = 0;
char *top;
@@ -1806,10 +1817,28 @@ int ext4_find_dest_de(struct inode *dir, struct inode *inode,
return -EFSCORRUPTED;
if (ext4_match(fname, de))
return -EEXIST;
- nlen = EXT4_DIR_REC_LEN(de->name_len);
+ nlen = EXT4_DIR_REC_LEN(de);
rlen = ext4_rec_len_from_disk(de->rec_len, buf_size);
+ /* Check first for enough space for the full entry */
if ((de->inode ? rlen - nlen : rlen) >= reclen)
break;
+ /* Then for dotdot entries, check for the smaller space
+ * required for just the entry, no FID
+ */
+ if (is_dotdot) {
+ if ((de->inode ? rlen - nlen : rlen) >=
+ dotdot_reclen) {
+ *write_short_dotdot = true;
+ break;
+ }
+ /* The new ".." entry mut be written over the
+ * previous ".." entry, which is the first
+ * entry traversed by this scan. If it doesn't
+ * fit, something is badly wrong, so -EIO.
+ */
+ return -EIO;
+ }
+
de = (struct ext4_dir_entry_2 *)((char *)de + rlen);
offset += rlen;
}
@@ -1828,7 +1857,8 @@ void ext4_insert_dentry(struct inode *inode,
int nlen, rlen;
- nlen = EXT4_DIR_REC_LEN(de->name_len);
+ nlen = EXT4_DIR_REC_LEN(de);
+
rlen = ext4_rec_len_from_disk(de->rec_len, buf_size);
if (de->inode) {
struct ext4_dir_entry_2 *de1 =
@@ -1852,21 +1882,46 @@ void ext4_insert_dentry(struct inode *inode,
* space. It will return -ENOSPC if no space is available, and -EIO
* and -EEXIST if directory entry already exists.
*/
-static int add_dirent_to_buf(handle_t *handle, struct ext4_filename *fname,
+static int add_dirent_to_buf(handle_t *handle,
+ struct dentry *dentry,
+ struct ext4_filename *fname,
struct inode *dir,
struct inode *inode, struct ext4_dir_entry_2 *de,
struct buffer_head *bh)
{
unsigned int blocksize = dir->i_sb->s_blocksize;
int csum_size = 0;
- int err;
+ unsigned short reclen, dotdot_reclen = 0;
+ int err, dlen = 0;
+ bool is_dotdot = false, write_short_dotdot = false;
+ struct ext4_dirent_data_header *ddh;
+ int namelen = dentry->d_name.len;
if (ext4_has_metadata_csum(inode->i_sb))
csum_size = sizeof(struct ext4_dir_entry_tail);
+ ddh = ext4_dentry_get_data(inode->i_sb, (struct ext4_dentry_param *)
+ dentry->d_fsdata);
+ if (ddh)
+ dlen = ddh->ddh_length + 1 /* NUL separator */;
+
+ is_dotdot = (namelen == 2 &&
+ memcmp(dentry->d_name.name, "..", 2) == 0);
+
+ /* dotdot entries must be in the second place in a directory block,
+ * so calculate an alternate length without the dirdata so they can
+ * always be made to fit in the existing slot
+ */
+ if (is_dotdot)
+ dotdot_reclen = EXT4_DIR_NAME_LEN(namelen);
+
+ reclen = EXT4_DIR_NAME_LEN(namelen + dlen + 3);
+
if (!de) {
err = ext4_find_dest_de(dir, inode, bh, bh->b_data,
- blocksize - csum_size, fname, &de);
+ blocksize - csum_size, fname, &de,
+ is_dotdot,
+ &write_short_dotdot, dotdot_reclen);
if (err)
return err;
}
@@ -1880,6 +1935,24 @@ static int add_dirent_to_buf(handle_t *handle, struct ext4_filename *fname,
/* By now the buffer is marked for journaling */
ext4_insert_dentry(inode, de, blocksize, fname);
+ /* If we're writing short form of "dotdot", don't add data section */
+ if (ddh && !write_short_dotdot) {
+ de->name[namelen] = 0;
+ memcpy(&de->name[namelen + 1], ddh, ddh->ddh_length);
+ de->file_type |= EXT4_DIRENT_LUFID;
+ data_offset = ddh->ddh_length;
+ }
+
+ 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);
+ }
+
/*
* XXX shouldn't update any times until successful
* completion of syscall, but too many callers depend
@@ -1976,20 +2049,17 @@ static int make_indexed_dir(handle_t *handle, struct ext4_filename *fname,
dotdot_de->rec_len =
ext4_rec_len_to_disk(blocksize - le16_to_cpu(dot_de->rec_len),
blocksize);
-
/* initialize hashing info */
dx_info = dx_get_dx_info(dot_de);
memset(dx_info, 0, sizeof(*dx_info));
dx_info->info_length = sizeof(*dx_info);
dx_info->hash_version = EXT4_SB(dir->i_sb)->s_def_hash_version;
-
entries = (void *)dx_info + sizeof(*dx_info);
-
dx_set_block(entries, 1);
dx_set_count(entries, 1);
- dx_set_limit(entries, dx_root_limit(dir, (struct ext4_dir_entry_2 *)
- frame->bh->b_data,
- sizeof(*dx_info)));
+ dx_set_limit(entries, dx_root_limit(dir,
+ (struct ext4_dir_entry_2 *)frame->bh->b_data,
+ sizeof(*dx_info)));
/* Initialize as for dx_probe */
fname->hinfo.hash_version = dx_info->hash_version;
@@ -2017,7 +2087,7 @@ static int make_indexed_dir(handle_t *handle, struct ext4_filename *fname,
goto out_frames;
}
- retval = add_dirent_to_buf(handle, fname, dir, inode, de, bh2);
+ retval = add_dirent_to_buf(handle, NULL, fname, dir, inode, de, bh2);
out_frames:
/*
* Even if the block split failed, we have to properly write
@@ -2094,7 +2164,7 @@ static int ext4_add_entry(handle_t *handle, struct dentry *dentry,
bh = NULL;
goto out;
}
- retval = add_dirent_to_buf(handle, &fname, dir, inode,
+ retval = add_dirent_to_buf(handle, dentry, &fname, dir, inode,
NULL, bh);
if (retval != -ENOSPC)
goto out;
@@ -2123,7 +2193,7 @@ static int ext4_add_entry(handle_t *handle, struct dentry *dentry,
initialize_dirent_tail(t, blocksize);
}
- retval = add_dirent_to_buf(handle, &fname, dir, inode, de, bh);
+ retval = add_dirent_to_buf(handle, dentry, &fname, dir, inode, de, bh);
out:
ext4_fname_free_filename(&fname);
brelse(bh);
@@ -2165,7 +2235,7 @@ static int ext4_dx_add_entry(handle_t *handle, struct ext4_filename *fname,
if (err)
goto journal_error;
- err = add_dirent_to_buf(handle, fname, dir, inode, NULL, bh);
+ err = add_dirent_to_buf(handle, NULL, fname, dir, inode, NULL, bh);
if (err != -ENOSPC)
goto cleanup;
@@ -2291,7 +2361,7 @@ static int ext4_dx_add_entry(handle_t *handle, struct ext4_filename *fname,
err = PTR_ERR(de);
goto cleanup;
}
- err = add_dirent_to_buf(handle, fname, dir, inode, de, bh);
+ err = add_dirent_to_buf(handle, NULL, fname, dir, inode, de, bh);
goto cleanup;
journal_error:
@@ -2557,7 +2627,7 @@ struct ext4_dir_entry_2 *ext4_init_dot_dotdot(struct inode *inode,
{
de->inode = cpu_to_le32(inode->i_ino);
de->name_len = 1;
- de->rec_len = ext4_rec_len_to_disk(EXT4_DIR_REC_LEN(de->name_len),
+ de->rec_len = ext4_rec_len_to_disk(EXT4_DIR_REC_LEN(de),
blocksize);
strcpy(de->name, ".");
ext4_set_de_type(inode->i_sb, de, S_IFDIR);
@@ -2567,11 +2637,11 @@ struct ext4_dir_entry_2 *ext4_init_dot_dotdot(struct inode *inode,
de->name_len = 2;
if (!dotdot_real_len)
de->rec_len = ext4_rec_len_to_disk(blocksize -
- (csum_size + EXT4_DIR_REC_LEN(1)),
+ (csum_size + EXT4_DIR_NAME_LEN(1)),
blocksize);
else
de->rec_len = ext4_rec_len_to_disk(
- EXT4_DIR_REC_LEN(de->name_len), blocksize);
+ EXT4_DIR_REC_LEN(de), blocksize);
strcpy(de->name, "..");
ext4_set_de_type(inode->i_sb, de, S_IFDIR);
@@ -2700,7 +2770,7 @@ bool ext4_empty_dir(struct inode *inode)
}
sb = inode->i_sb;
- if (inode->i_size < EXT4_DIR_REC_LEN(1) + EXT4_DIR_REC_LEN(2)) {
+ if (inode->i_size < EXT4_DIR_NAME_LEN(1) + EXT4_DIR_NAME_LEN(2)) {
EXT4_ERROR_INODE(inode, "invalid size");
return true;
}
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index b0915b734a38..ead9406d9cff 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1339,7 +1339,7 @@ enum {
Opt_data_err_abort, Opt_data_err_ignore, Opt_test_dummy_encryption,
Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota,
Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota,
- Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err,
+ Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, Opt_dirdata,
Opt_usrquota, Opt_grpquota, Opt_prjquota, Opt_i_version, Opt_dax,
Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit,
Opt_lazytime, Opt_nolazytime, Opt_debug_want_extra_isize,
@@ -1400,6 +1400,7 @@ static const match_table_t tokens = {
{Opt_noquota, "noquota"},
{Opt_quota, "quota"},
{Opt_usrquota, "usrquota"},
+ {Opt_dirdata, "dirdata"},
{Opt_prjquota, "prjquota"},
{Opt_barrier, "barrier=%u"},
{Opt_barrier, "barrier"},
--
2.13.6 (Apple Git-96)
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