/*
- * linux/fs/ext3/namei.c
+ * linux/fs/ext4/namei.c
*
* Copyright (C) 1992, 1993, 1994, 1995
* Remy Card (card@masi.ibp.fr)
#include <linux/fs.h>
#include <linux/pagemap.h>
-#include <linux/jbd.h>
+#include <linux/jbd2.h>
#include <linux/time.h>
-#include <linux/ext3_fs.h>
-#include <linux/ext3_jbd.h>
#include <linux/fcntl.h>
#include <linux/stat.h>
#include <linux/string.h>
#include <linux/quotaops.h>
#include <linux/buffer_head.h>
#include <linux/bio.h>
-#include <linux/smp_lock.h>
+#include "ext4.h"
+#include "ext4_jbd2.h"
#include "namei.h"
#include "xattr.h"
*/
#define NAMEI_RA_CHUNKS 2
#define NAMEI_RA_BLOCKS 4
-#define NAMEI_RA_SIZE (NAMEI_RA_CHUNKS * NAMEI_RA_BLOCKS)
+#define NAMEI_RA_SIZE (NAMEI_RA_CHUNKS * NAMEI_RA_BLOCKS)
#define NAMEI_RA_INDEX(c,b) (((c) * NAMEI_RA_BLOCKS) + (b))
-static struct buffer_head *ext3_append(handle_t *handle,
+static struct buffer_head *ext4_append(handle_t *handle,
struct inode *inode,
- u32 *block, int *err)
+ ext4_lblk_t *block, int *err)
{
struct buffer_head *bh;
*block = inode->i_size >> inode->i_sb->s_blocksize_bits;
- if ((bh = ext3_bread(handle, inode, *block, 1, err))) {
+ bh = ext4_bread(handle, inode, *block, 1, err);
+ if (bh) {
inode->i_size += inode->i_sb->s_blocksize;
- EXT3_I(inode)->i_disksize = inode->i_size;
- ext3_journal_get_write_access(handle,bh);
+ EXT4_I(inode)->i_disksize = inode->i_size;
+ *err = ext4_journal_get_write_access(handle, bh);
+ if (*err) {
+ brelse(bh);
+ bh = NULL;
+ }
}
return bh;
}
#define assert(test) J_ASSERT(test)
#endif
-#ifndef swap
-#define swap(x, y) do { typeof(x) z = x; x = y; y = z; } while (0)
-#endif
-
#ifdef DX_DEBUG
#define dxtrace(command) command
#else
struct dx_map_entry
{
u32 hash;
- u32 offs;
+ u16 offs;
+ u16 size;
};
-#ifdef CONFIG_EXT3_INDEX
-static inline unsigned dx_get_block (struct dx_entry *entry);
-static void dx_set_block (struct dx_entry *entry, unsigned value);
-static inline unsigned dx_get_hash (struct dx_entry *entry);
-static void dx_set_hash (struct dx_entry *entry, unsigned value);
-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 unsigned dx_node_limit (struct inode *dir);
-static struct dx_frame *dx_probe(struct dentry *dentry,
+static inline ext4_lblk_t dx_get_block(struct dx_entry *entry);
+static void dx_set_block(struct dx_entry *entry, ext4_lblk_t value);
+static inline unsigned dx_get_hash(struct dx_entry *entry);
+static void dx_set_hash(struct dx_entry *entry, unsigned value);
+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 unsigned dx_node_limit(struct inode *dir);
+static struct dx_frame *dx_probe(const struct qstr *d_name,
struct inode *dir,
struct dx_hash_info *hinfo,
struct dx_frame *frame,
int *err);
-static void dx_release (struct dx_frame *frames);
-static int dx_make_map (struct ext3_dir_entry_2 *de, int size,
- struct dx_hash_info *hinfo, struct dx_map_entry map[]);
+static void dx_release(struct dx_frame *frames);
+static int dx_make_map(struct ext4_dir_entry_2 *de, int size,
+ struct dx_hash_info *hinfo, struct dx_map_entry map[]);
static void dx_sort_map(struct dx_map_entry *map, unsigned count);
-static struct ext3_dir_entry_2 *dx_move_dirents (char *from, char *to,
+static struct ext4_dir_entry_2 *dx_move_dirents(char *from, char *to,
struct dx_map_entry *offsets, int count);
-static struct ext3_dir_entry_2* dx_pack_dirents (char *base, int size);
-static void dx_insert_block (struct dx_frame *frame, u32 hash, u32 block);
-static int ext3_htree_next_block(struct inode *dir, __u32 hash,
+static struct ext4_dir_entry_2* dx_pack_dirents(char *base, int size);
+static void dx_insert_block(struct dx_frame *frame,
+ u32 hash, ext4_lblk_t block);
+static int ext4_htree_next_block(struct inode *dir, __u32 hash,
struct dx_frame *frame,
struct dx_frame *frames,
__u32 *start_hash);
-static struct buffer_head * ext3_dx_find_entry(struct dentry *dentry,
- struct ext3_dir_entry_2 **res_dir, int *err);
-static int ext3_dx_add_entry(handle_t *handle, struct dentry *dentry,
+static struct buffer_head * ext4_dx_find_entry(struct inode *dir,
+ const struct qstr *d_name,
+ struct ext4_dir_entry_2 **res_dir,
+ int *err);
+static int ext4_dx_add_entry(handle_t *handle, struct dentry *dentry,
struct inode *inode);
/*
+ * p is at least 6 bytes before the end of page
+ */
+static inline struct ext4_dir_entry_2 *
+ext4_next_entry(struct ext4_dir_entry_2 *p)
+{
+ return (struct ext4_dir_entry_2 *)((char *)p +
+ ext4_rec_len_from_disk(p->rec_len));
+}
+
+/*
* Future: use high four bits of block for coalesce-on-delete flags
* Mask them off for now.
*/
-static inline unsigned dx_get_block (struct dx_entry *entry)
+static inline ext4_lblk_t dx_get_block(struct dx_entry *entry)
{
return le32_to_cpu(entry->block) & 0x00ffffff;
}
-static inline void dx_set_block (struct dx_entry *entry, unsigned value)
+static inline void dx_set_block(struct dx_entry *entry, ext4_lblk_t value)
{
entry->block = cpu_to_le32(value);
}
-static inline unsigned dx_get_hash (struct dx_entry *entry)
+static inline unsigned dx_get_hash(struct dx_entry *entry)
{
return le32_to_cpu(entry->hash);
}
-static inline void dx_set_hash (struct dx_entry *entry, unsigned value)
+static inline void dx_set_hash(struct dx_entry *entry, unsigned value)
{
entry->hash = cpu_to_le32(value);
}
-static inline unsigned dx_get_count (struct dx_entry *entries)
+static inline unsigned dx_get_count(struct dx_entry *entries)
{
return le16_to_cpu(((struct dx_countlimit *) entries)->count);
}
-static inline unsigned dx_get_limit (struct dx_entry *entries)
+static inline unsigned dx_get_limit(struct dx_entry *entries)
{
return le16_to_cpu(((struct dx_countlimit *) entries)->limit);
}
-static inline void dx_set_count (struct dx_entry *entries, unsigned value)
+static inline void dx_set_count(struct dx_entry *entries, unsigned value)
{
((struct dx_countlimit *) entries)->count = cpu_to_le16(value);
}
-static inline void dx_set_limit (struct dx_entry *entries, unsigned value)
+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 dx_root_limit(struct inode *dir, unsigned infosize)
{
- unsigned entry_space = dir->i_sb->s_blocksize - EXT3_DIR_REC_LEN(1) -
- EXT3_DIR_REC_LEN(2) - infosize;
- return 0? 20: entry_space / sizeof(struct dx_entry);
+ unsigned entry_space = dir->i_sb->s_blocksize - EXT4_DIR_REC_LEN(1) -
+ EXT4_DIR_REC_LEN(2) - infosize;
+ return entry_space / sizeof(struct dx_entry);
}
-static inline unsigned dx_node_limit (struct inode *dir)
+static inline unsigned dx_node_limit(struct inode *dir)
{
- unsigned entry_space = dir->i_sb->s_blocksize - EXT3_DIR_REC_LEN(0);
- return 0? 22: entry_space / sizeof(struct dx_entry);
+ unsigned entry_space = dir->i_sb->s_blocksize - EXT4_DIR_REC_LEN(0);
+ return entry_space / sizeof(struct dx_entry);
}
/*
* Debug
*/
#ifdef DX_DEBUG
-static void dx_show_index (char * label, struct dx_entry *entries)
+static void dx_show_index(char * label, struct dx_entry *entries)
{
- int i, n = dx_get_count (entries);
- printk("%s index ", label);
- for (i = 0; i < n; i++)
- {
- printk("%x->%u ", i? dx_get_hash(entries + i): 0, dx_get_block(entries + i));
- }
- printk("\n");
+ int i, n = dx_get_count (entries);
+ printk(KERN_DEBUG "%s index ", label);
+ for (i = 0; i < n; i++) {
+ printk("%x->%lu ", i ? dx_get_hash(entries + i) :
+ 0, (unsigned long)dx_get_block(entries + i));
+ }
+ printk("\n");
}
struct stats
unsigned bcount;
};
-static struct stats dx_show_leaf(struct dx_hash_info *hinfo, struct ext3_dir_entry_2 *de,
+static struct stats dx_show_leaf(struct dx_hash_info *hinfo, struct ext4_dir_entry_2 *de,
int size, int show_names)
{
unsigned names = 0, space = 0;
int len = de->name_len;
char *name = de->name;
while (len--) printk("%c", *name++);
- ext3fs_dirhash(de->name, de->name_len, &h);
+ ext4fs_dirhash(de->name, de->name_len, &h);
printk(":%x.%u ", h.hash,
((char *) de - base));
}
- space += EXT3_DIR_REC_LEN(de->name_len);
+ space += EXT4_DIR_REC_LEN(de->name_len);
names++;
}
- de = (struct ext3_dir_entry_2 *) ((char *) de + le16_to_cpu(de->rec_len));
+ de = ext4_next_entry(de);
}
printk("(%i)\n", names);
return (struct stats) { names, space, 1 };
struct dx_entry *entries, int levels)
{
unsigned blocksize = dir->i_sb->s_blocksize;
- unsigned count = dx_get_count (entries), names = 0, space = 0, i;
+ unsigned count = dx_get_count(entries), names = 0, space = 0, i;
unsigned bcount = 0;
struct buffer_head *bh;
int err;
printk("%i indexed blocks...\n", count);
for (i = 0; i < count; i++, entries++)
{
- u32 block = dx_get_block(entries), hash = i? dx_get_hash(entries): 0;
+ ext4_lblk_t block = dx_get_block(entries);
+ ext4_lblk_t hash = i ? dx_get_hash(entries): 0;
u32 range = i < count - 1? (dx_get_hash(entries + 1) - hash): ~hash;
struct stats stats;
printk("%s%3u:%03u hash %8x/%8x ",levels?"":" ", i, block, hash, range);
- if (!(bh = ext3_bread (NULL,dir, block, 0,&err))) continue;
+ if (!(bh = ext4_bread (NULL,dir, block, 0,&err))) continue;
stats = levels?
dx_show_entries(hinfo, dir, ((struct dx_node *) bh->b_data)->entries, levels - 1):
- dx_show_leaf(hinfo, (struct ext3_dir_entry_2 *) bh->b_data, blocksize, 0);
+ dx_show_leaf(hinfo, (struct ext4_dir_entry_2 *) bh->b_data, blocksize, 0);
names += stats.names;
space += stats.space;
bcount += stats.bcount;
- brelse (bh);
+ brelse(bh);
}
if (bcount)
- printk("%snames %u, fullness %u (%u%%)\n", levels?"":" ",
- names, space/bcount,(space/bcount)*100/blocksize);
+ printk(KERN_DEBUG "%snames %u, fullness %u (%u%%)\n",
+ levels ? "" : " ", names, space/bcount,
+ (space/bcount)*100/blocksize);
return (struct stats) { names, space, bcount};
}
#endif /* DX_DEBUG */
* back to userspace.
*/
static struct dx_frame *
-dx_probe(struct dentry *dentry, struct inode *dir,
+dx_probe(const struct qstr *d_name, struct inode *dir,
struct dx_hash_info *hinfo, struct dx_frame *frame_in, int *err)
{
unsigned count, indirect;
u32 hash;
frame->bh = NULL;
- if (dentry)
- dir = dentry->d_parent->d_inode;
- if (!(bh = ext3_bread (NULL,dir, 0, 0, err)))
+ if (!(bh = ext4_bread (NULL,dir, 0, 0, err)))
goto fail;
root = (struct dx_root *) bh->b_data;
if (root->info.hash_version != DX_HASH_TEA &&
root->info.hash_version != DX_HASH_HALF_MD4 &&
root->info.hash_version != DX_HASH_LEGACY) {
- ext3_warning(dir->i_sb, __FUNCTION__,
+ ext4_warning(dir->i_sb, __func__,
"Unrecognised inode hash code %d",
root->info.hash_version);
brelse(bh);
goto fail;
}
hinfo->hash_version = root->info.hash_version;
- hinfo->seed = EXT3_SB(dir->i_sb)->s_hash_seed;
- if (dentry)
- ext3fs_dirhash(dentry->d_name.name, dentry->d_name.len, hinfo);
+ if (hinfo->hash_version <= DX_HASH_TEA)
+ hinfo->hash_version += EXT4_SB(dir->i_sb)->s_hash_unsigned;
+ hinfo->seed = EXT4_SB(dir->i_sb)->s_hash_seed;
+ if (d_name)
+ ext4fs_dirhash(d_name->name, d_name->len, hinfo);
hash = hinfo->hash;
if (root->info.unused_flags & 1) {
- ext3_warning(dir->i_sb, __FUNCTION__,
+ ext4_warning(dir->i_sb, __func__,
"Unimplemented inode hash flags: %#06x",
root->info.unused_flags);
brelse(bh);
}
if ((indirect = root->info.indirect_levels) > 1) {
- ext3_warning(dir->i_sb, __FUNCTION__,
+ ext4_warning(dir->i_sb, __func__,
"Unimplemented inode hash depth: %#06x",
root->info.indirect_levels);
brelse(bh);
entries = (struct dx_entry *) (((char *)&root->info) +
root->info.info_length);
- assert(dx_get_limit(entries) == dx_root_limit(dir,
- root->info.info_length));
- dxtrace (printk("Look up %x", hash));
+
+ if (dx_get_limit(entries) != dx_root_limit(dir,
+ root->info.info_length)) {
+ ext4_warning(dir->i_sb, __func__,
+ "dx entry: limit != root limit");
+ brelse(bh);
+ *err = ERR_BAD_DX_DIR;
+ goto fail;
+ }
+
+ dxtrace(printk("Look up %x", hash));
while (1)
{
count = dx_get_count(entries);
- assert (count && count <= dx_get_limit(entries));
+ if (!count || count > dx_get_limit(entries)) {
+ ext4_warning(dir->i_sb, __func__,
+ "dx entry: no count or count > limit");
+ brelse(bh);
+ *err = ERR_BAD_DX_DIR;
+ goto fail2;
+ }
+
p = entries + 1;
q = entries + count - 1;
while (p <= q)
frame->entries = entries;
frame->at = at;
if (!indirect--) return frame;
- if (!(bh = ext3_bread (NULL,dir, dx_get_block(at), 0, err)))
+ if (!(bh = ext4_bread (NULL,dir, dx_get_block(at), 0, err)))
goto fail2;
at = entries = ((struct dx_node *) bh->b_data)->entries;
- assert (dx_get_limit(entries) == dx_node_limit (dir));
+ if (dx_get_limit(entries) != dx_node_limit (dir)) {
+ ext4_warning(dir->i_sb, __func__,
+ "dx entry: limit != node limit");
+ brelse(bh);
+ *err = ERR_BAD_DX_DIR;
+ goto fail2;
+ }
frame++;
+ frame->bh = NULL;
}
fail2:
while (frame >= frame_in) {
frame--;
}
fail:
+ if (*err == ERR_BAD_DX_DIR)
+ ext4_warning(dir->i_sb, __func__,
+ "Corrupt dir inode %ld, running e2fsck is "
+ "recommended.", dir->i_ino);
return NULL;
}
* If start_hash is non-null, it will be filled in with the starting
* hash of the next page.
*/
-static int ext3_htree_next_block(struct inode *dir, __u32 hash,
+static int ext4_htree_next_block(struct inode *dir, __u32 hash,
struct dx_frame *frame,
struct dx_frame *frames,
__u32 *start_hash)
* block so no check is necessary
*/
while (num_frames--) {
- if (!(bh = ext3_bread(NULL, dir, dx_get_block(p->at),
+ if (!(bh = ext4_bread(NULL, dir, dx_get_block(p->at),
0, &err)))
return err; /* Failure */
p++;
- brelse (p->bh);
+ brelse(p->bh);
p->bh = bh;
p->at = p->entries = ((struct dx_node *) bh->b_data)->entries;
}
/*
- * p is at least 6 bytes before the end of page
- */
-static inline struct ext3_dir_entry_2 *ext3_next_entry(struct ext3_dir_entry_2 *p)
-{
- return (struct ext3_dir_entry_2 *)((char*)p + le16_to_cpu(p->rec_len));
-}
-
-/*
* This function fills a red-black tree with information from a
* directory block. It returns the number directory entries loaded
* into the tree. If there is an error it is returned in err.
*/
static int htree_dirblock_to_tree(struct file *dir_file,
- struct inode *dir, int block,
+ struct inode *dir, ext4_lblk_t block,
struct dx_hash_info *hinfo,
__u32 start_hash, __u32 start_minor_hash)
{
struct buffer_head *bh;
- struct ext3_dir_entry_2 *de, *top;
+ struct ext4_dir_entry_2 *de, *top;
int err, count = 0;
- dxtrace(printk("In htree dirblock_to_tree: block %d\n", block));
- if (!(bh = ext3_bread (NULL, dir, block, 0, &err)))
+ dxtrace(printk(KERN_INFO "In htree dirblock_to_tree: block %lu\n",
+ (unsigned long)block));
+ if (!(bh = ext4_bread (NULL, dir, block, 0, &err)))
return err;
- de = (struct ext3_dir_entry_2 *) bh->b_data;
- top = (struct ext3_dir_entry_2 *) ((char *) de +
+ de = (struct ext4_dir_entry_2 *) bh->b_data;
+ top = (struct ext4_dir_entry_2 *) ((char *) de +
dir->i_sb->s_blocksize -
- EXT3_DIR_REC_LEN(0));
- for (; de < top; de = ext3_next_entry(de)) {
- ext3fs_dirhash(de->name, de->name_len, hinfo);
+ EXT4_DIR_REC_LEN(0));
+ for (; de < top; de = ext4_next_entry(de)) {
+ if (!ext4_check_dir_entry("htree_dirblock_to_tree", dir, de, bh,
+ (block<<EXT4_BLOCK_SIZE_BITS(dir->i_sb))
+ +((char *)de - bh->b_data))) {
+ /* On error, skip the f_pos to the next block. */
+ dir_file->f_pos = (dir_file->f_pos |
+ (dir->i_sb->s_blocksize - 1)) + 1;
+ brelse(bh);
+ return count;
+ }
+ ext4fs_dirhash(de->name, de->name_len, hinfo);
if ((hinfo->hash < start_hash) ||
((hinfo->hash == start_hash) &&
(hinfo->minor_hash < start_minor_hash)))
continue;
if (de->inode == 0)
continue;
- if ((err = ext3_htree_store_dirent(dir_file,
+ if ((err = ext4_htree_store_dirent(dir_file,
hinfo->hash, hinfo->minor_hash, de)) != 0) {
brelse(bh);
return err;
* This function returns the number of entries inserted into the tree,
* or a negative error code.
*/
-int ext3_htree_fill_tree(struct file *dir_file, __u32 start_hash,
+int ext4_htree_fill_tree(struct file *dir_file, __u32 start_hash,
__u32 start_minor_hash, __u32 *next_hash)
{
struct dx_hash_info hinfo;
- struct ext3_dir_entry_2 *de;
+ struct ext4_dir_entry_2 *de;
struct dx_frame frames[2], *frame;
struct inode *dir;
- int block, err;
+ ext4_lblk_t block;
int count = 0;
- int ret;
+ int ret, err;
__u32 hashval;
- dxtrace(printk("In htree_fill_tree, start hash: %x:%x\n", start_hash,
- start_minor_hash));
- dir = dir_file->f_dentry->d_inode;
- if (!(EXT3_I(dir)->i_flags & EXT3_INDEX_FL)) {
- hinfo.hash_version = EXT3_SB(dir->i_sb)->s_def_hash_version;
- hinfo.seed = EXT3_SB(dir->i_sb)->s_hash_seed;
+ dxtrace(printk(KERN_DEBUG "In htree_fill_tree, start hash: %x:%x\n",
+ start_hash, start_minor_hash));
+ dir = dir_file->f_path.dentry->d_inode;
+ if (!(EXT4_I(dir)->i_flags & EXT4_INDEX_FL)) {
+ hinfo.hash_version = EXT4_SB(dir->i_sb)->s_def_hash_version;
+ if (hinfo.hash_version <= DX_HASH_TEA)
+ hinfo.hash_version +=
+ EXT4_SB(dir->i_sb)->s_hash_unsigned;
+ hinfo.seed = EXT4_SB(dir->i_sb)->s_hash_seed;
count = htree_dirblock_to_tree(dir_file, dir, 0, &hinfo,
start_hash, start_minor_hash);
*next_hash = ~0;
}
hinfo.hash = start_hash;
hinfo.minor_hash = 0;
- frame = dx_probe(NULL, dir_file->f_dentry->d_inode, &hinfo, frames, &err);
+ frame = dx_probe(NULL, dir, &hinfo, frames, &err);
if (!frame)
return err;
/* Add '.' and '..' from the htree header */
if (!start_hash && !start_minor_hash) {
- de = (struct ext3_dir_entry_2 *) frames[0].bh->b_data;
- if ((err = ext3_htree_store_dirent(dir_file, 0, 0, de)) != 0)
+ de = (struct ext4_dir_entry_2 *) frames[0].bh->b_data;
+ if ((err = ext4_htree_store_dirent(dir_file, 0, 0, de)) != 0)
goto errout;
count++;
}
if (start_hash < 2 || (start_hash ==2 && start_minor_hash==0)) {
- de = (struct ext3_dir_entry_2 *) frames[0].bh->b_data;
- de = ext3_next_entry(de);
- if ((err = ext3_htree_store_dirent(dir_file, 2, 0, de)) != 0)
+ de = (struct ext4_dir_entry_2 *) frames[0].bh->b_data;
+ de = ext4_next_entry(de);
+ if ((err = ext4_htree_store_dirent(dir_file, 2, 0, de)) != 0)
goto errout;
count++;
}
}
count += ret;
hashval = ~0;
- ret = ext3_htree_next_block(dir, HASH_NB_ALWAYS,
+ ret = ext4_htree_next_block(dir, HASH_NB_ALWAYS,
frame, frames, &hashval);
*next_hash = hashval;
if (ret < 0) {
break;
}
dx_release(frames);
- dxtrace(printk("Fill tree: returned %d entries, next hash: %x\n",
- count, *next_hash));
+ dxtrace(printk(KERN_DEBUG "Fill tree: returned %d entries, "
+ "next hash: %x\n", count, *next_hash));
return count;
errout:
dx_release(frames);
* Directory block splitting, compacting
*/
-static int dx_make_map (struct ext3_dir_entry_2 *de, int size,
+/*
+ * Create map of hash values, offsets, and sizes, stored at end of block.
+ * Returns number of entries mapped.
+ */
+static int dx_make_map (struct ext4_dir_entry_2 *de, int size,
struct dx_hash_info *hinfo, struct dx_map_entry *map_tail)
{
int count = 0;
while ((char *) de < base + size)
{
if (de->name_len && de->inode) {
- ext3fs_dirhash(de->name, de->name_len, &h);
+ ext4fs_dirhash(de->name, de->name_len, &h);
map_tail--;
map_tail->hash = h.hash;
- map_tail->offs = (u32) ((char *) de - base);
+ map_tail->offs = (u16) ((char *) de - base);
+ map_tail->size = le16_to_cpu(de->rec_len);
count++;
cond_resched();
}
/* XXX: do we need to check rec_len == 0 case? -Chris */
- de = (struct ext3_dir_entry_2 *) ((char *) de + le16_to_cpu(de->rec_len));
+ de = ext4_next_entry(de);
}
return count;
}
+/* Sort map by hash value */
static void dx_sort_map (struct dx_map_entry *map, unsigned count)
{
- struct dx_map_entry *p, *q, *top = map + count - 1;
- int more;
- /* Combsort until bubble sort doesn't suck */
- while (count > 2)
- {
- count = count*10/13;
- if (count - 9 < 2) /* 9, 10 -> 11 */
- count = 11;
- for (p = top, q = p - count; q >= map; p--, q--)
- if (p->hash < q->hash)
- swap(*p, *q);
- }
- /* Garden variety bubble sort */
- do {
- more = 0;
- q = top;
- while (q-- > map)
- {
- if (q[1].hash >= q[0].hash)
+ struct dx_map_entry *p, *q, *top = map + count - 1;
+ int more;
+ /* Combsort until bubble sort doesn't suck */
+ while (count > 2) {
+ count = count*10/13;
+ if (count - 9 < 2) /* 9, 10 -> 11 */
+ count = 11;
+ for (p = top, q = p - count; q >= map; p--, q--)
+ if (p->hash < q->hash)
+ swap(*p, *q);
+ }
+ /* Garden variety bubble sort */
+ do {
+ more = 0;
+ q = top;
+ while (q-- > map) {
+ if (q[1].hash >= q[0].hash)
continue;
- swap(*(q+1), *q);
- more = 1;
+ swap(*(q+1), *q);
+ more = 1;
}
} while(more);
}
-static void dx_insert_block(struct dx_frame *frame, u32 hash, u32 block)
+static void dx_insert_block(struct dx_frame *frame, u32 hash, ext4_lblk_t block)
{
struct dx_entry *entries = frame->entries;
struct dx_entry *old = frame->at, *new = old + 1;
dx_set_block(new, block);
dx_set_count(entries, count + 1);
}
-#endif
-
-static void ext3_update_dx_flag(struct inode *inode)
+static void ext4_update_dx_flag(struct inode *inode)
{
- if (!EXT3_HAS_COMPAT_FEATURE(inode->i_sb,
- EXT3_FEATURE_COMPAT_DIR_INDEX))
- EXT3_I(inode)->i_flags &= ~EXT3_INDEX_FL;
+ if (!EXT4_HAS_COMPAT_FEATURE(inode->i_sb,
+ EXT4_FEATURE_COMPAT_DIR_INDEX))
+ EXT4_I(inode)->i_flags &= ~EXT4_INDEX_FL;
}
/*
- * NOTE! unlike strncmp, ext3_match returns 1 for success, 0 for failure.
+ * NOTE! unlike strncmp, ext4_match returns 1 for success, 0 for failure.
*
- * `len <= EXT3_NAME_LEN' is guaranteed by caller.
+ * `len <= EXT4_NAME_LEN' is guaranteed by caller.
* `de != NULL' is guaranteed by caller.
*/
-static inline int ext3_match (int len, const char * const name,
- struct ext3_dir_entry_2 * de)
+static inline int ext4_match (int len, const char * const name,
+ struct ext4_dir_entry_2 * de)
{
if (len != de->name_len)
return 0;
/*
* Returns 0 if not found, -1 on failure, and 1 on success
*/
-static inline int search_dirblock(struct buffer_head * bh,
+static inline int search_dirblock(struct buffer_head *bh,
struct inode *dir,
- struct dentry *dentry,
- unsigned long offset,
- struct ext3_dir_entry_2 ** res_dir)
+ const struct qstr *d_name,
+ unsigned int offset,
+ struct ext4_dir_entry_2 ** res_dir)
{
- struct ext3_dir_entry_2 * de;
+ struct ext4_dir_entry_2 * de;
char * dlimit;
int de_len;
- const char *name = dentry->d_name.name;
- int namelen = dentry->d_name.len;
+ const char *name = d_name->name;
+ int namelen = d_name->len;
- de = (struct ext3_dir_entry_2 *) bh->b_data;
+ de = (struct ext4_dir_entry_2 *) bh->b_data;
dlimit = bh->b_data + dir->i_sb->s_blocksize;
while ((char *) de < dlimit) {
/* this code is executed quadratically often */
/* do minimal checking `by hand' */
if ((char *) de + namelen <= dlimit &&
- ext3_match (namelen, name, de)) {
+ ext4_match (namelen, name, de)) {
/* found a match - just to be sure, do a full check */
- if (!ext3_check_dir_entry("ext3_find_entry",
+ if (!ext4_check_dir_entry("ext4_find_entry",
dir, de, bh, offset))
return -1;
*res_dir = de;
return 1;
}
/* prevent looping on a bad block */
- de_len = le16_to_cpu(de->rec_len);
+ de_len = ext4_rec_len_from_disk(de->rec_len);
if (de_len <= 0)
return -1;
offset += de_len;
- de = (struct ext3_dir_entry_2 *) ((char *) de + de_len);
+ de = (struct ext4_dir_entry_2 *) ((char *) de + de_len);
}
return 0;
}
/*
- * ext3_find_entry()
+ * ext4_find_entry()
*
* finds an entry in the specified directory with the wanted name. It
* returns the cache buffer in which the entry was found, and the entry
* The returned buffer_head has ->b_count elevated. The caller is expected
* to brelse() it when appropriate.
*/
-static struct buffer_head * ext3_find_entry (struct dentry *dentry,
- struct ext3_dir_entry_2 ** res_dir)
+static struct buffer_head * ext4_find_entry (struct inode *dir,
+ const struct qstr *d_name,
+ struct ext4_dir_entry_2 ** res_dir)
{
- struct super_block * sb;
- struct buffer_head * bh_use[NAMEI_RA_SIZE];
- struct buffer_head * bh, *ret = NULL;
- unsigned long start, block, b;
+ struct super_block *sb;
+ struct buffer_head *bh_use[NAMEI_RA_SIZE];
+ struct buffer_head *bh, *ret = NULL;
+ ext4_lblk_t start, block, b;
int ra_max = 0; /* Number of bh's in the readahead
buffer, bh_use[] */
int ra_ptr = 0; /* Current index into readahead
buffer */
int num = 0;
- int nblocks, i, err;
- struct inode *dir = dentry->d_parent->d_inode;
+ ext4_lblk_t nblocks;
+ int i, err;
int namelen;
- const u8 *name;
- unsigned blocksize;
*res_dir = NULL;
sb = dir->i_sb;
- blocksize = sb->s_blocksize;
- namelen = dentry->d_name.len;
- name = dentry->d_name.name;
- if (namelen > EXT3_NAME_LEN)
+ namelen = d_name->len;
+ if (namelen > EXT4_NAME_LEN)
return NULL;
-#ifdef CONFIG_EXT3_INDEX
if (is_dx(dir)) {
- bh = ext3_dx_find_entry(dentry, res_dir, &err);
+ bh = ext4_dx_find_entry(dir, d_name, res_dir, &err);
/*
* On success, or if the error was file not found,
* return. Otherwise, fall back to doing a search the
*/
if (bh || (err != ERR_BAD_DX_DIR))
return bh;
- dxtrace(printk("ext3_find_entry: dx failed, falling back\n"));
+ dxtrace(printk(KERN_DEBUG "ext4_find_entry: dx failed, "
+ "falling back\n"));
}
-#endif
- nblocks = dir->i_size >> EXT3_BLOCK_SIZE_BITS(sb);
- start = EXT3_I(dir)->i_dir_start_lookup;
+ nblocks = dir->i_size >> EXT4_BLOCK_SIZE_BITS(sb);
+ start = EXT4_I(dir)->i_dir_start_lookup;
if (start >= nblocks)
start = 0;
block = start;
break;
}
num++;
- bh = ext3_getblk(NULL, dir, b++, 0, &err);
+ bh = ext4_getblk(NULL, dir, b++, 0, &err);
bh_use[ra_max] = bh;
if (bh)
ll_rw_block(READ_META, 1, &bh);
wait_on_buffer(bh);
if (!buffer_uptodate(bh)) {
/* read error, skip block & hope for the best */
- ext3_error(sb, __FUNCTION__, "reading directory #%lu "
- "offset %lu", dir->i_ino, block);
+ ext4_error(sb, __func__, "reading directory #%lu "
+ "offset %lu", dir->i_ino,
+ (unsigned long)block);
brelse(bh);
goto next;
}
- i = search_dirblock(bh, dir, dentry,
- block << EXT3_BLOCK_SIZE_BITS(sb), res_dir);
+ i = search_dirblock(bh, dir, d_name,
+ block << EXT4_BLOCK_SIZE_BITS(sb), res_dir);
if (i == 1) {
- EXT3_I(dir)->i_dir_start_lookup = block;
+ EXT4_I(dir)->i_dir_start_lookup = block;
ret = bh;
goto cleanup_and_exit;
} else {
* search the last part of the directory before giving up.
*/
block = nblocks;
- nblocks = dir->i_size >> EXT3_BLOCK_SIZE_BITS(sb);
+ nblocks = dir->i_size >> EXT4_BLOCK_SIZE_BITS(sb);
if (block < nblocks) {
start = 0;
goto restart;
cleanup_and_exit:
/* Clean up the read-ahead blocks */
for (; ra_ptr < ra_max; ra_ptr++)
- brelse (bh_use[ra_ptr]);
+ brelse(bh_use[ra_ptr]);
return ret;
}
-#ifdef CONFIG_EXT3_INDEX
-static struct buffer_head * ext3_dx_find_entry(struct dentry *dentry,
- struct ext3_dir_entry_2 **res_dir, int *err)
+static struct buffer_head * ext4_dx_find_entry(struct inode *dir, const struct qstr *d_name,
+ struct ext4_dir_entry_2 **res_dir, int *err)
{
struct super_block * sb;
struct dx_hash_info hinfo;
u32 hash;
struct dx_frame frames[2], *frame;
- struct ext3_dir_entry_2 *de, *top;
+ struct ext4_dir_entry_2 *de, *top;
struct buffer_head *bh;
- unsigned long block;
+ ext4_lblk_t block;
int retval;
- int namelen = dentry->d_name.len;
- const u8 *name = dentry->d_name.name;
- struct inode *dir = dentry->d_parent->d_inode;
+ int namelen = d_name->len;
+ const u8 *name = d_name->name;
sb = dir->i_sb;
/* NFS may look up ".." - look at dx_root directory block */
if (namelen > 2 || name[0] != '.'||(name[1] != '.' && name[1] != '\0')){
- if (!(frame = dx_probe(dentry, NULL, &hinfo, frames, err)))
+ if (!(frame = dx_probe(d_name, dir, &hinfo, frames, err)))
return NULL;
} else {
frame = frames;
hash = hinfo.hash;
do {
block = dx_get_block(frame->at);
- if (!(bh = ext3_bread (NULL,dir, block, 0, err)))
+ if (!(bh = ext4_bread (NULL,dir, block, 0, err)))
goto errout;
- de = (struct ext3_dir_entry_2 *) bh->b_data;
- top = (struct ext3_dir_entry_2 *) ((char *) de + sb->s_blocksize -
- EXT3_DIR_REC_LEN(0));
- for (; de < top; de = ext3_next_entry(de))
- if (ext3_match (namelen, name, de)) {
- if (!ext3_check_dir_entry("ext3_find_entry",
- dir, de, bh,
- (block<<EXT3_BLOCK_SIZE_BITS(sb))
- +((char *)de - bh->b_data))) {
- brelse (bh);
+ de = (struct ext4_dir_entry_2 *) bh->b_data;
+ top = (struct ext4_dir_entry_2 *) ((char *) de + sb->s_blocksize -
+ EXT4_DIR_REC_LEN(0));
+ for (; de < top; de = ext4_next_entry(de)) {
+ int off = (block << EXT4_BLOCK_SIZE_BITS(sb))
+ + ((char *) de - bh->b_data);
+
+ if (!ext4_check_dir_entry(__func__, dir, de, bh, off)) {
+ brelse(bh);
+ *err = ERR_BAD_DX_DIR;
goto errout;
}
- *res_dir = de;
- dx_release (frames);
- return bh;
+
+ if (ext4_match(namelen, name, de)) {
+ *res_dir = de;
+ dx_release(frames);
+ return bh;
+ }
}
- brelse (bh);
+ brelse(bh);
/* Check to see if we should continue to search */
- retval = ext3_htree_next_block(dir, hash, frame,
+ retval = ext4_htree_next_block(dir, hash, frame,
frames, NULL);
if (retval < 0) {
- ext3_warning(sb, __FUNCTION__,
+ ext4_warning(sb, __func__,
"error reading index page in directory #%lu",
dir->i_ino);
*err = retval;
*err = -ENOENT;
errout:
- dxtrace(printk("%s not found\n", name));
+ dxtrace(printk(KERN_DEBUG "%s not found\n", name));
dx_release (frames);
return NULL;
}
-#endif
-static struct dentry *ext3_lookup(struct inode * dir, struct dentry *dentry, struct nameidata *nd)
+static struct dentry *ext4_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
{
- struct inode * inode;
- struct ext3_dir_entry_2 * de;
- struct buffer_head * bh;
+ struct inode *inode;
+ struct ext4_dir_entry_2 *de;
+ struct buffer_head *bh;
- if (dentry->d_name.len > EXT3_NAME_LEN)
+ if (dentry->d_name.len > EXT4_NAME_LEN)
return ERR_PTR(-ENAMETOOLONG);
- bh = ext3_find_entry(dentry, &de);
+ bh = ext4_find_entry(dir, &dentry->d_name, &de);
inode = NULL;
if (bh) {
- unsigned long ino = le32_to_cpu(de->inode);
- brelse (bh);
- if (!ext3_valid_inum(dir->i_sb, ino)) {
- ext3_error(dir->i_sb, "ext3_lookup",
- "bad inode number: %lu", ino);
- inode = NULL;
- } else
- inode = iget(dir->i_sb, ino);
-
- if (!inode)
- return ERR_PTR(-EACCES);
+ __u32 ino = le32_to_cpu(de->inode);
+ brelse(bh);
+ if (!ext4_valid_inum(dir->i_sb, ino)) {
+ ext4_error(dir->i_sb, "ext4_lookup",
+ "bad inode number: %u", ino);
+ return ERR_PTR(-EIO);
+ }
+ inode = ext4_iget(dir->i_sb, ino);
+ if (IS_ERR(inode))
+ return ERR_CAST(inode);
}
return d_splice_alias(inode, dentry);
}
-struct dentry *ext3_get_parent(struct dentry *child)
+struct dentry *ext4_get_parent(struct dentry *child)
{
- unsigned long ino;
- struct dentry *parent;
+ __u32 ino;
struct inode *inode;
- struct dentry dotdot;
- struct ext3_dir_entry_2 * de;
+ static const struct qstr dotdot = {
+ .name = "..",
+ .len = 2,
+ };
+ struct ext4_dir_entry_2 * de;
struct buffer_head *bh;
- dotdot.d_name.name = "..";
- dotdot.d_name.len = 2;
- dotdot.d_parent = child; /* confusing, isn't it! */
-
- bh = ext3_find_entry(&dotdot, &de);
+ bh = ext4_find_entry(child->d_inode, &dotdot, &de);
inode = NULL;
if (!bh)
return ERR_PTR(-ENOENT);
ino = le32_to_cpu(de->inode);
brelse(bh);
- if (!ext3_valid_inum(child->d_inode->i_sb, ino)) {
- ext3_error(child->d_inode->i_sb, "ext3_get_parent",
- "bad inode number: %lu", ino);
- inode = NULL;
- } else
- inode = iget(child->d_inode->i_sb, ino);
-
- if (!inode)
- return ERR_PTR(-EACCES);
-
- parent = d_alloc_anon(inode);
- if (!parent) {
- iput(inode);
- parent = ERR_PTR(-ENOMEM);
+ if (!ext4_valid_inum(child->d_inode->i_sb, ino)) {
+ ext4_error(child->d_inode->i_sb, "ext4_get_parent",
+ "bad inode number: %u", ino);
+ return ERR_PTR(-EIO);
}
- return parent;
+
+ return d_obtain_alias(ext4_iget(child->d_inode->i_sb, ino));
}
#define S_SHIFT 12
-static unsigned char ext3_type_by_mode[S_IFMT >> S_SHIFT] = {
- [S_IFREG >> S_SHIFT] = EXT3_FT_REG_FILE,
- [S_IFDIR >> S_SHIFT] = EXT3_FT_DIR,
- [S_IFCHR >> S_SHIFT] = EXT3_FT_CHRDEV,
- [S_IFBLK >> S_SHIFT] = EXT3_FT_BLKDEV,
- [S_IFIFO >> S_SHIFT] = EXT3_FT_FIFO,
- [S_IFSOCK >> S_SHIFT] = EXT3_FT_SOCK,
- [S_IFLNK >> S_SHIFT] = EXT3_FT_SYMLINK,
+static unsigned char ext4_type_by_mode[S_IFMT >> S_SHIFT] = {
+ [S_IFREG >> S_SHIFT] = EXT4_FT_REG_FILE,
+ [S_IFDIR >> S_SHIFT] = EXT4_FT_DIR,
+ [S_IFCHR >> S_SHIFT] = EXT4_FT_CHRDEV,
+ [S_IFBLK >> S_SHIFT] = EXT4_FT_BLKDEV,
+ [S_IFIFO >> S_SHIFT] = EXT4_FT_FIFO,
+ [S_IFSOCK >> S_SHIFT] = EXT4_FT_SOCK,
+ [S_IFLNK >> S_SHIFT] = EXT4_FT_SYMLINK,
};
-static inline void ext3_set_de_type(struct super_block *sb,
- struct ext3_dir_entry_2 *de,
+static inline void ext4_set_de_type(struct super_block *sb,
+ struct ext4_dir_entry_2 *de,
umode_t mode) {
- if (EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_FILETYPE))
- de->file_type = ext3_type_by_mode[(mode & S_IFMT)>>S_SHIFT];
+ if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FILETYPE))
+ de->file_type = ext4_type_by_mode[(mode & S_IFMT)>>S_SHIFT];
}
-#ifdef CONFIG_EXT3_INDEX
-static struct ext3_dir_entry_2 *
+/*
+ * Move count entries from end of map between two memory locations.
+ * Returns pointer to last entry moved.
+ */
+static struct ext4_dir_entry_2 *
dx_move_dirents(char *from, char *to, struct dx_map_entry *map, int count)
{
unsigned rec_len = 0;
while (count--) {
- struct ext3_dir_entry_2 *de = (struct ext3_dir_entry_2 *) (from + map->offs);
- rec_len = EXT3_DIR_REC_LEN(de->name_len);
+ struct ext4_dir_entry_2 *de = (struct ext4_dir_entry_2 *) (from + map->offs);
+ rec_len = EXT4_DIR_REC_LEN(de->name_len);
memcpy (to, de, rec_len);
- ((struct ext3_dir_entry_2 *) to)->rec_len =
- cpu_to_le16(rec_len);
+ ((struct ext4_dir_entry_2 *) to)->rec_len =
+ ext4_rec_len_to_disk(rec_len);
de->inode = 0;
map++;
to += rec_len;
}
- return (struct ext3_dir_entry_2 *) (to - rec_len);
+ return (struct ext4_dir_entry_2 *) (to - rec_len);
}
-static struct ext3_dir_entry_2* dx_pack_dirents(char *base, int size)
+/*
+ * Compact each dir entry in the range to the minimal rec_len.
+ * Returns pointer to last entry in range.
+ */
+static struct ext4_dir_entry_2* dx_pack_dirents(char *base, int size)
{
- struct ext3_dir_entry_2 *next, *to, *prev, *de = (struct ext3_dir_entry_2 *) base;
+ struct ext4_dir_entry_2 *next, *to, *prev, *de = (struct ext4_dir_entry_2 *) base;
unsigned rec_len = 0;
prev = to = de;
while ((char*)de < base + size) {
- next = (struct ext3_dir_entry_2 *) ((char *) de +
- le16_to_cpu(de->rec_len));
+ next = ext4_next_entry(de);
if (de->inode && de->name_len) {
- rec_len = EXT3_DIR_REC_LEN(de->name_len);
+ rec_len = EXT4_DIR_REC_LEN(de->name_len);
if (de > to)
memmove(to, de, rec_len);
- to->rec_len = cpu_to_le16(rec_len);
+ to->rec_len = ext4_rec_len_to_disk(rec_len);
prev = to;
- to = (struct ext3_dir_entry_2 *) (((char *) to) + rec_len);
+ to = (struct ext4_dir_entry_2 *) (((char *) to) + rec_len);
}
de = next;
}
return prev;
}
-static struct ext3_dir_entry_2 *do_split(handle_t *handle, struct inode *dir,
+/*
+ * Split a full leaf block to make room for a new dir entry.
+ * Allocate a new block, and move entries so that they are approx. equally full.
+ * Returns pointer to de in block into which the new entry will be inserted.
+ */
+static struct ext4_dir_entry_2 *do_split(handle_t *handle, struct inode *dir,
struct buffer_head **bh,struct dx_frame *frame,
struct dx_hash_info *hinfo, int *error)
{
unsigned blocksize = dir->i_sb->s_blocksize;
unsigned count, continued;
struct buffer_head *bh2;
- u32 newblock;
+ ext4_lblk_t newblock;
u32 hash2;
struct dx_map_entry *map;
char *data1 = (*bh)->b_data, *data2;
- unsigned split;
- struct ext3_dir_entry_2 *de = NULL, *de2;
- int err;
+ unsigned split, move, size;
+ struct ext4_dir_entry_2 *de = NULL, *de2;
+ int err = 0, i;
- bh2 = ext3_append (handle, dir, &newblock, error);
+ bh2 = ext4_append (handle, dir, &newblock, &err);
if (!(bh2)) {
brelse(*bh);
*bh = NULL;
}
BUFFER_TRACE(*bh, "get_write_access");
- err = ext3_journal_get_write_access(handle, *bh);
- if (err) {
- journal_error:
- brelse(*bh);
- brelse(bh2);
- *bh = NULL;
- ext3_std_error(dir->i_sb, err);
- goto errout;
- }
+ err = ext4_journal_get_write_access(handle, *bh);
+ if (err)
+ goto journal_error;
+
BUFFER_TRACE(frame->bh, "get_write_access");
- err = ext3_journal_get_write_access(handle, frame->bh);
+ err = ext4_journal_get_write_access(handle, frame->bh);
if (err)
goto journal_error;
/* create map in the end of data2 block */
map = (struct dx_map_entry *) (data2 + blocksize);
- count = dx_make_map ((struct ext3_dir_entry_2 *) data1,
+ count = dx_make_map((struct ext4_dir_entry_2 *) data1,
blocksize, hinfo, map);
map -= count;
- split = count/2; // need to adjust to actual middle
- dx_sort_map (map, count);
+ dx_sort_map(map, count);
+ /* Split the existing block in the middle, size-wise */
+ size = 0;
+ move = 0;
+ for (i = count-1; i >= 0; i--) {
+ /* is more than half of this entry in 2nd half of the block? */
+ if (size + map[i].size/2 > blocksize/2)
+ break;
+ size += map[i].size;
+ move++;
+ }
+ /* map index at which we will split */
+ split = count - move;
hash2 = map[split].hash;
continued = hash2 == map[split - 1].hash;
- dxtrace(printk("Split block %i at %x, %i/%i\n",
- dx_get_block(frame->at), hash2, split, count-split));
+ dxtrace(printk(KERN_INFO "Split block %lu at %x, %i/%i\n",
+ (unsigned long)dx_get_block(frame->at),
+ hash2, split, count-split));
/* Fancy dance to stay within two buffers */
de2 = dx_move_dirents(data1, data2, map + split, count - split);
- de = dx_pack_dirents(data1,blocksize);
- de->rec_len = cpu_to_le16(data1 + blocksize - (char *) de);
- de2->rec_len = cpu_to_le16(data2 + blocksize - (char *) de2);
- dxtrace(dx_show_leaf (hinfo, (struct ext3_dir_entry_2 *) data1, blocksize, 1));
- dxtrace(dx_show_leaf (hinfo, (struct ext3_dir_entry_2 *) data2, blocksize, 1));
+ de = dx_pack_dirents(data1, blocksize);
+ de->rec_len = ext4_rec_len_to_disk(data1 + blocksize - (char *) de);
+ de2->rec_len = ext4_rec_len_to_disk(data2 + blocksize - (char *) de2);
+ dxtrace(dx_show_leaf (hinfo, (struct ext4_dir_entry_2 *) data1, blocksize, 1));
+ dxtrace(dx_show_leaf (hinfo, (struct ext4_dir_entry_2 *) data2, blocksize, 1));
/* Which block gets the new entry? */
if (hinfo->hash >= hash2)
swap(*bh, bh2);
de = de2;
}
- dx_insert_block (frame, hash2 + continued, newblock);
- err = ext3_journal_dirty_metadata (handle, bh2);
+ dx_insert_block(frame, hash2 + continued, newblock);
+ err = ext4_handle_dirty_metadata(handle, dir, bh2);
if (err)
goto journal_error;
- err = ext3_journal_dirty_metadata (handle, frame->bh);
+ err = ext4_handle_dirty_metadata(handle, dir, frame->bh);
if (err)
goto journal_error;
- brelse (bh2);
- dxtrace(dx_show_index ("frame", frame->entries));
-errout:
+ brelse(bh2);
+ dxtrace(dx_show_index("frame", frame->entries));
return de;
-}
-#endif
+journal_error:
+ brelse(*bh);
+ brelse(bh2);
+ *bh = NULL;
+ ext4_std_error(dir->i_sb, err);
+errout:
+ *error = err;
+ return NULL;
+}
/*
* Add a new entry into a directory (leaf) block. If de is non-NULL,
* all other cases bh is released.
*/
static int add_dirent_to_buf(handle_t *handle, struct dentry *dentry,
- struct inode *inode, struct ext3_dir_entry_2 *de,
- struct buffer_head * bh)
+ struct inode *inode, struct ext4_dir_entry_2 *de,
+ struct buffer_head *bh)
{
struct inode *dir = dentry->d_parent->d_inode;
const char *name = dentry->d_name.name;
int namelen = dentry->d_name.len;
- unsigned long offset = 0;
+ unsigned int offset = 0;
unsigned short reclen;
int nlen, rlen, err;
char *top;
- reclen = EXT3_DIR_REC_LEN(namelen);
+ reclen = EXT4_DIR_REC_LEN(namelen);
if (!de) {
- de = (struct ext3_dir_entry_2 *)bh->b_data;
+ de = (struct ext4_dir_entry_2 *)bh->b_data;
top = bh->b_data + dir->i_sb->s_blocksize - reclen;
while ((char *) de <= top) {
- if (!ext3_check_dir_entry("ext3_add_entry", dir, de,
+ if (!ext4_check_dir_entry("ext4_add_entry", dir, de,
bh, offset)) {
- brelse (bh);
+ brelse(bh);
return -EIO;
}
- if (ext3_match (namelen, name, de)) {
- brelse (bh);
+ if (ext4_match(namelen, name, de)) {
+ brelse(bh);
return -EEXIST;
}
- nlen = EXT3_DIR_REC_LEN(de->name_len);
- rlen = le16_to_cpu(de->rec_len);
+ nlen = EXT4_DIR_REC_LEN(de->name_len);
+ rlen = ext4_rec_len_from_disk(de->rec_len);
if ((de->inode? rlen - nlen: rlen) >= reclen)
break;
- de = (struct ext3_dir_entry_2 *)((char *)de + rlen);
+ de = (struct ext4_dir_entry_2 *)((char *)de + rlen);
offset += rlen;
}
if ((char *) de > top)
return -ENOSPC;
}
BUFFER_TRACE(bh, "get_write_access");
- err = ext3_journal_get_write_access(handle, bh);
+ err = ext4_journal_get_write_access(handle, bh);
if (err) {
- ext3_std_error(dir->i_sb, err);
+ ext4_std_error(dir->i_sb, err);
brelse(bh);
return err;
}
/* By now the buffer is marked for journaling */
- nlen = EXT3_DIR_REC_LEN(de->name_len);
- rlen = le16_to_cpu(de->rec_len);
+ nlen = EXT4_DIR_REC_LEN(de->name_len);
+ rlen = ext4_rec_len_from_disk(de->rec_len);
if (de->inode) {
- struct ext3_dir_entry_2 *de1 = (struct ext3_dir_entry_2 *)((char *)de + nlen);
- de1->rec_len = cpu_to_le16(rlen - nlen);
- de->rec_len = cpu_to_le16(nlen);
+ struct ext4_dir_entry_2 *de1 = (struct ext4_dir_entry_2 *)((char *)de + nlen);
+ de1->rec_len = ext4_rec_len_to_disk(rlen - nlen);
+ de->rec_len = ext4_rec_len_to_disk(nlen);
de = de1;
}
- de->file_type = EXT3_FT_UNKNOWN;
+ de->file_type = EXT4_FT_UNKNOWN;
if (inode) {
de->inode = cpu_to_le32(inode->i_ino);
- ext3_set_de_type(dir->i_sb, de, inode->i_mode);
+ ext4_set_de_type(dir->i_sb, de, inode->i_mode);
} else
de->inode = 0;
de->name_len = namelen;
- memcpy (de->name, name, namelen);
+ memcpy(de->name, name, namelen);
/*
* XXX shouldn't update any times until successful
* completion of syscall, but too many callers depend
* on this.
*
* XXX similarly, too many callers depend on
- * ext3_new_inode() setting the times, but error
+ * ext4_new_inode() setting the times, but error
* recovery deletes the inode, so the worst that can
* happen is that the times are slightly out of date
* and/or different from the directory change time.
*/
- dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC;
- ext3_update_dx_flag(dir);
+ dir->i_mtime = dir->i_ctime = ext4_current_time(dir);
+ ext4_update_dx_flag(dir);
dir->i_version++;
- ext3_mark_inode_dirty(handle, dir);
- BUFFER_TRACE(bh, "call ext3_journal_dirty_metadata");
- err = ext3_journal_dirty_metadata(handle, bh);
+ ext4_mark_inode_dirty(handle, dir);
+ BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata");
+ err = ext4_handle_dirty_metadata(handle, dir, bh);
if (err)
- ext3_std_error(dir->i_sb, err);
+ ext4_std_error(dir->i_sb, err);
brelse(bh);
return 0;
}
-#ifdef CONFIG_EXT3_INDEX
/*
* This converts a one block unindexed directory to a 3 block indexed
* directory, and adds the dentry to the indexed directory.
struct dx_root *root;
struct dx_frame frames[2], *frame;
struct dx_entry *entries;
- struct ext3_dir_entry_2 *de, *de2;
+ struct ext4_dir_entry_2 *de, *de2;
char *data1, *top;
unsigned len;
int retval;
unsigned blocksize;
struct dx_hash_info hinfo;
- u32 block;
+ ext4_lblk_t block;
struct fake_dirent *fde;
blocksize = dir->i_sb->s_blocksize;
- dxtrace(printk("Creating index\n"));
- retval = ext3_journal_get_write_access(handle, bh);
+ dxtrace(printk(KERN_DEBUG "Creating index: inode %lu\n", dir->i_ino));
+ retval = ext4_journal_get_write_access(handle, bh);
if (retval) {
- ext3_std_error(dir->i_sb, retval);
+ ext4_std_error(dir->i_sb, retval);
brelse(bh);
return retval;
}
root = (struct dx_root *) bh->b_data;
- bh2 = ext3_append (handle, dir, &block, &retval);
+ /* The 0th block becomes the root, move the dirents out */
+ fde = &root->dotdot;
+ de = (struct ext4_dir_entry_2 *)((char *)fde +
+ ext4_rec_len_from_disk(fde->rec_len));
+ if ((char *) de >= (((char *) root) + blocksize)) {
+ ext4_error(dir->i_sb, __func__,
+ "invalid rec_len for '..' in inode %lu",
+ dir->i_ino);
+ brelse(bh);
+ return -EIO;
+ }
+ len = ((char *) root) + blocksize - (char *) de;
+
+ /* Allocate new block for the 0th block's dirents */
+ bh2 = ext4_append(handle, dir, &block, &retval);
if (!(bh2)) {
brelse(bh);
return retval;
}
- EXT3_I(dir)->i_flags |= EXT3_INDEX_FL;
+ EXT4_I(dir)->i_flags |= EXT4_INDEX_FL;
data1 = bh2->b_data;
- /* The 0th block becomes the root, move the dirents out */
- fde = &root->dotdot;
- de = (struct ext3_dir_entry_2 *)((char *)fde + le16_to_cpu(fde->rec_len));
- len = ((char *) root) + blocksize - (char *) de;
memcpy (data1, de, len);
- de = (struct ext3_dir_entry_2 *) data1;
+ de = (struct ext4_dir_entry_2 *) data1;
top = data1 + len;
- while ((char *)(de2=(void*)de+le16_to_cpu(de->rec_len)) < top)
+ while ((char *)(de2 = ext4_next_entry(de)) < top)
de = de2;
- de->rec_len = cpu_to_le16(data1 + blocksize - (char *) de);
+ de->rec_len = ext4_rec_len_to_disk(data1 + blocksize - (char *) de);
/* Initialize the root; the dot dirents already exist */
- de = (struct ext3_dir_entry_2 *) (&root->dotdot);
- de->rec_len = cpu_to_le16(blocksize - EXT3_DIR_REC_LEN(2));
+ de = (struct ext4_dir_entry_2 *) (&root->dotdot);
+ de->rec_len = ext4_rec_len_to_disk(blocksize - EXT4_DIR_REC_LEN(2));
memset (&root->info, 0, sizeof(root->info));
root->info.info_length = sizeof(root->info);
- root->info.hash_version = EXT3_SB(dir->i_sb)->s_def_hash_version;
+ root->info.hash_version = EXT4_SB(dir->i_sb)->s_def_hash_version;
entries = root->entries;
- dx_set_block (entries, 1);
- dx_set_count (entries, 1);
- dx_set_limit (entries, dx_root_limit(dir, sizeof(root->info)));
+ dx_set_block(entries, 1);
+ dx_set_count(entries, 1);
+ dx_set_limit(entries, dx_root_limit(dir, sizeof(root->info)));
/* Initialize as for dx_probe */
hinfo.hash_version = root->info.hash_version;
- hinfo.seed = EXT3_SB(dir->i_sb)->s_hash_seed;
- ext3fs_dirhash(name, namelen, &hinfo);
+ if (hinfo.hash_version <= DX_HASH_TEA)
+ hinfo.hash_version += EXT4_SB(dir->i_sb)->s_hash_unsigned;
+ hinfo.seed = EXT4_SB(dir->i_sb)->s_hash_seed;
+ ext4fs_dirhash(name, namelen, &hinfo);
frame = frames;
frame->entries = entries;
frame->at = entries;
return add_dirent_to_buf(handle, dentry, inode, de, bh);
}
-#endif
/*
- * ext3_add_entry()
+ * ext4_add_entry()
*
* adds a file entry to the specified directory, using the same
- * semantics as ext3_find_entry(). It returns NULL if it failed.
+ * semantics as ext4_find_entry(). It returns NULL if it failed.
*
* NOTE!! The inode part of 'de' is left at 0 - which means you
* may not sleep between calling this and putting something into
* the entry, as someone else might have used it while you slept.
*/
-static int ext3_add_entry (handle_t *handle, struct dentry *dentry,
- struct inode *inode)
+static int ext4_add_entry(handle_t *handle, struct dentry *dentry,
+ struct inode *inode)
{
struct inode *dir = dentry->d_parent->d_inode;
- unsigned long offset;
- struct buffer_head * bh;
- struct ext3_dir_entry_2 *de;
- struct super_block * sb;
+ struct buffer_head *bh;
+ struct ext4_dir_entry_2 *de;
+ struct super_block *sb;
int retval;
-#ifdef CONFIG_EXT3_INDEX
int dx_fallback=0;
-#endif
unsigned blocksize;
- u32 block, blocks;
+ ext4_lblk_t block, blocks;
sb = dir->i_sb;
blocksize = sb->s_blocksize;
if (!dentry->d_name.len)
return -EINVAL;
-#ifdef CONFIG_EXT3_INDEX
if (is_dx(dir)) {
- retval = ext3_dx_add_entry(handle, dentry, inode);
+ retval = ext4_dx_add_entry(handle, dentry, inode);
if (!retval || (retval != ERR_BAD_DX_DIR))
return retval;
- EXT3_I(dir)->i_flags &= ~EXT3_INDEX_FL;
+ EXT4_I(dir)->i_flags &= ~EXT4_INDEX_FL;
dx_fallback++;
- ext3_mark_inode_dirty(handle, dir);
+ ext4_mark_inode_dirty(handle, dir);
}
-#endif
blocks = dir->i_size >> sb->s_blocksize_bits;
- for (block = 0, offset = 0; block < blocks; block++) {
- bh = ext3_bread(handle, dir, block, 0, &retval);
+ for (block = 0; block < blocks; block++) {
+ bh = ext4_bread(handle, dir, block, 0, &retval);
if(!bh)
return retval;
retval = add_dirent_to_buf(handle, dentry, inode, NULL, bh);
if (retval != -ENOSPC)
return retval;
-#ifdef CONFIG_EXT3_INDEX
if (blocks == 1 && !dx_fallback &&
- EXT3_HAS_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_DIR_INDEX))
+ EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_DIR_INDEX))
return make_indexed_dir(handle, dentry, inode, bh);
-#endif
brelse(bh);
}
- bh = ext3_append(handle, dir, &block, &retval);
+ bh = ext4_append(handle, dir, &block, &retval);
if (!bh)
return retval;
- de = (struct ext3_dir_entry_2 *) bh->b_data;
+ de = (struct ext4_dir_entry_2 *) bh->b_data;
de->inode = 0;
- de->rec_len = cpu_to_le16(blocksize);
+ de->rec_len = ext4_rec_len_to_disk(blocksize);
return add_dirent_to_buf(handle, dentry, inode, de, bh);
}
-#ifdef CONFIG_EXT3_INDEX
/*
* Returns 0 for success, or a negative error value
*/
-static int ext3_dx_add_entry(handle_t *handle, struct dentry *dentry,
+static int ext4_dx_add_entry(handle_t *handle, struct dentry *dentry,
struct inode *inode)
{
struct dx_frame frames[2], *frame;
struct dx_entry *entries, *at;
struct dx_hash_info hinfo;
- struct buffer_head * bh;
+ struct buffer_head *bh;
struct inode *dir = dentry->d_parent->d_inode;
- struct super_block * sb = dir->i_sb;
- struct ext3_dir_entry_2 *de;
+ struct super_block *sb = dir->i_sb;
+ struct ext4_dir_entry_2 *de;
int err;
- frame = dx_probe(dentry, NULL, &hinfo, frames, &err);
+ frame = dx_probe(&dentry->d_name, dir, &hinfo, frames, &err);
if (!frame)
return err;
entries = frame->entries;
at = frame->at;
- if (!(bh = ext3_bread(handle,dir, dx_get_block(frame->at), 0, &err)))
+ if (!(bh = ext4_bread(handle,dir, dx_get_block(frame->at), 0, &err)))
goto cleanup;
BUFFER_TRACE(bh, "get_write_access");
- err = ext3_journal_get_write_access(handle, bh);
+ err = ext4_journal_get_write_access(handle, bh);
if (err)
goto journal_error;
}
/* Block full, should compress but for now just split */
- dxtrace(printk("using %u of %u node entries\n",
+ dxtrace(printk(KERN_DEBUG "using %u of %u node entries\n",
dx_get_count(entries), dx_get_limit(entries)));
/* Need to split index? */
if (dx_get_count(entries) == dx_get_limit(entries)) {
- u32 newblock;
+ ext4_lblk_t newblock;
unsigned icount = dx_get_count(entries);
int levels = frame - frames;
struct dx_entry *entries2;
if (levels && (dx_get_count(frames->entries) ==
dx_get_limit(frames->entries))) {
- ext3_warning(sb, __FUNCTION__,
+ ext4_warning(sb, __func__,
"Directory index full!");
err = -ENOSPC;
goto cleanup;
}
- bh2 = ext3_append (handle, dir, &newblock, &err);
+ bh2 = ext4_append (handle, dir, &newblock, &err);
if (!(bh2))
goto cleanup;
node2 = (struct dx_node *)(bh2->b_data);
entries2 = node2->entries;
- node2->fake.rec_len = cpu_to_le16(sb->s_blocksize);
+ node2->fake.rec_len = ext4_rec_len_to_disk(sb->s_blocksize);
node2->fake.inode = 0;
BUFFER_TRACE(frame->bh, "get_write_access");
- err = ext3_journal_get_write_access(handle, frame->bh);
+ err = ext4_journal_get_write_access(handle, frame->bh);
if (err)
goto journal_error;
if (levels) {
unsigned icount1 = icount/2, icount2 = icount - icount1;
unsigned hash2 = dx_get_hash(entries + icount1);
- dxtrace(printk("Split index %i/%i\n", icount1, icount2));
+ dxtrace(printk(KERN_DEBUG "Split index %i/%i\n",
+ icount1, icount2));
BUFFER_TRACE(frame->bh, "get_write_access"); /* index root */
- err = ext3_journal_get_write_access(handle,
+ err = ext4_journal_get_write_access(handle,
frames[0].bh);
if (err)
goto journal_error;
- memcpy ((char *) entries2, (char *) (entries + icount1),
- icount2 * sizeof(struct dx_entry));
- dx_set_count (entries, icount1);
- dx_set_count (entries2, icount2);
- dx_set_limit (entries2, dx_node_limit(dir));
+ memcpy((char *) entries2, (char *) (entries + icount1),
+ icount2 * sizeof(struct dx_entry));
+ dx_set_count(entries, icount1);
+ dx_set_count(entries2, icount2);
+ dx_set_limit(entries2, dx_node_limit(dir));
/* Which index block gets the new entry? */
if (at - entries >= icount1) {
frame->entries = entries = entries2;
swap(frame->bh, bh2);
}
- dx_insert_block (frames + 0, hash2, newblock);
- dxtrace(dx_show_index ("node", frames[1].entries));
- dxtrace(dx_show_index ("node",
+ dx_insert_block(frames + 0, hash2, newblock);
+ dxtrace(dx_show_index("node", frames[1].entries));
+ dxtrace(dx_show_index("node",
((struct dx_node *) bh2->b_data)->entries));
- err = ext3_journal_dirty_metadata(handle, bh2);
+ err = ext4_handle_dirty_metadata(handle, inode, bh2);
if (err)
goto journal_error;
brelse (bh2);
} else {
- dxtrace(printk("Creating second level index...\n"));
+ dxtrace(printk(KERN_DEBUG
+ "Creating second level index...\n"));
memcpy((char *) entries2, (char *) entries,
icount * sizeof(struct dx_entry));
dx_set_limit(entries2, dx_node_limit(dir));
frame->at = at = at - entries + entries2;
frame->entries = entries = entries2;
frame->bh = bh2;
- err = ext3_journal_get_write_access(handle,
+ err = ext4_journal_get_write_access(handle,
frame->bh);
if (err)
goto journal_error;
}
- ext3_journal_dirty_metadata(handle, frames[0].bh);
+ ext4_handle_dirty_metadata(handle, inode, frames[0].bh);
}
de = do_split(handle, dir, &bh, frame, &hinfo, &err);
if (!de)
goto cleanup;
journal_error:
- ext3_std_error(dir->i_sb, err);
+ ext4_std_error(dir->i_sb, err);
cleanup:
if (bh)
brelse(bh);
dx_release(frames);
return err;
}
-#endif
/*
- * ext3_delete_entry deletes a directory entry by merging it with the
+ * ext4_delete_entry deletes a directory entry by merging it with the
* previous entry
*/
-static int ext3_delete_entry (handle_t *handle,
- struct inode * dir,
- struct ext3_dir_entry_2 * de_del,
- struct buffer_head * bh)
+static int ext4_delete_entry(handle_t *handle,
+ struct inode *dir,
+ struct ext4_dir_entry_2 *de_del,
+ struct buffer_head *bh)
{
- struct ext3_dir_entry_2 * de, * pde;
+ struct ext4_dir_entry_2 *de, *pde;
int i;
i = 0;
pde = NULL;
- de = (struct ext3_dir_entry_2 *) bh->b_data;
+ de = (struct ext4_dir_entry_2 *) bh->b_data;
while (i < bh->b_size) {
- if (!ext3_check_dir_entry("ext3_delete_entry", dir, de, bh, i))
+ if (!ext4_check_dir_entry("ext4_delete_entry", dir, de, bh, i))
return -EIO;
if (de == de_del) {
BUFFER_TRACE(bh, "get_write_access");
- ext3_journal_get_write_access(handle, bh);
+ ext4_journal_get_write_access(handle, bh);
if (pde)
- pde->rec_len =
- cpu_to_le16(le16_to_cpu(pde->rec_len) +
- le16_to_cpu(de->rec_len));
+ pde->rec_len = ext4_rec_len_to_disk(
+ ext4_rec_len_from_disk(pde->rec_len) +
+ ext4_rec_len_from_disk(de->rec_len));
else
de->inode = 0;
dir->i_version++;
- BUFFER_TRACE(bh, "call ext3_journal_dirty_metadata");
- ext3_journal_dirty_metadata(handle, bh);
+ BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata");
+ ext4_handle_dirty_metadata(handle, dir, bh);
return 0;
}
- i += le16_to_cpu(de->rec_len);
+ i += ext4_rec_len_from_disk(de->rec_len);
pde = de;
- de = (struct ext3_dir_entry_2 *)
- ((char *) de + le16_to_cpu(de->rec_len));
+ de = ext4_next_entry(de);
}
return -ENOENT;
}
/*
- * ext3_mark_inode_dirty is somewhat expensive, so unlike ext2 we
- * do not perform it in these functions. We perform it at the call site,
- * if it is needed.
+ * DIR_NLINK feature is set if 1) nlinks > EXT4_LINK_MAX or 2) nlinks == 2,
+ * since this indicates that nlinks count was previously 1.
*/
-static inline void ext3_inc_count(handle_t *handle, struct inode *inode)
+static void ext4_inc_count(handle_t *handle, struct inode *inode)
{
inc_nlink(inode);
+ if (is_dx(inode) && inode->i_nlink > 1) {
+ /* limit is 16-bit i_links_count */
+ if (inode->i_nlink >= EXT4_LINK_MAX || inode->i_nlink == 2) {
+ inode->i_nlink = 1;
+ EXT4_SET_RO_COMPAT_FEATURE(inode->i_sb,
+ EXT4_FEATURE_RO_COMPAT_DIR_NLINK);
+ }
+ }
}
-static inline void ext3_dec_count(handle_t *handle, struct inode *inode)
+/*
+ * If a directory had nlink == 1, then we should let it be 1. This indicates
+ * directory has >EXT4_LINK_MAX subdirs.
+ */
+static void ext4_dec_count(handle_t *handle, struct inode *inode)
{
drop_nlink(inode);
+ if (S_ISDIR(inode->i_mode) && inode->i_nlink == 0)
+ inc_nlink(inode);
}
-static int ext3_add_nondir(handle_t *handle,
+
+static int ext4_add_nondir(handle_t *handle,
struct dentry *dentry, struct inode *inode)
{
- int err = ext3_add_entry(handle, dentry, inode);
+ int err = ext4_add_entry(handle, dentry, inode);
if (!err) {
- ext3_mark_inode_dirty(handle, inode);
+ ext4_mark_inode_dirty(handle, inode);
d_instantiate(dentry, inode);
+ unlock_new_inode(inode);
return 0;
}
- ext3_dec_count(handle, inode);
+ drop_nlink(inode);
+ unlock_new_inode(inode);
iput(inode);
return err;
}
* If the create succeeds, we fill in the inode information
* with d_instantiate().
*/
-static int ext3_create (struct inode * dir, struct dentry * dentry, int mode,
- struct nameidata *nd)
+static int ext4_create(struct inode *dir, struct dentry *dentry, int mode,
+ struct nameidata *nd)
{
handle_t *handle;
- struct inode * inode;
+ struct inode *inode;
int err, retries = 0;
retry:
- handle = ext3_journal_start(dir, EXT3_DATA_TRANS_BLOCKS(dir->i_sb) +
- EXT3_INDEX_EXTRA_TRANS_BLOCKS + 3 +
- 2*EXT3_QUOTA_INIT_BLOCKS(dir->i_sb));
+ handle = ext4_journal_start(dir, EXT4_DATA_TRANS_BLOCKS(dir->i_sb) +
+ EXT4_INDEX_EXTRA_TRANS_BLOCKS + 3 +
+ 2*EXT4_QUOTA_INIT_BLOCKS(dir->i_sb));
if (IS_ERR(handle))
return PTR_ERR(handle);
if (IS_DIRSYNC(dir))
- handle->h_sync = 1;
+ ext4_handle_sync(handle);
- inode = ext3_new_inode (handle, dir, mode);
+ inode = ext4_new_inode (handle, dir, mode);
err = PTR_ERR(inode);
if (!IS_ERR(inode)) {
- inode->i_op = &ext3_file_inode_operations;
- inode->i_fop = &ext3_file_operations;
- ext3_set_aops(inode);
- err = ext3_add_nondir(handle, dentry, inode);
+ inode->i_op = &ext4_file_inode_operations;
+ inode->i_fop = &ext4_file_operations;
+ ext4_set_aops(inode);
+ err = ext4_add_nondir(handle, dentry, inode);
}
- ext3_journal_stop(handle);
- if (err == -ENOSPC && ext3_should_retry_alloc(dir->i_sb, &retries))
+ ext4_journal_stop(handle);
+ if (err == -ENOSPC && ext4_should_retry_alloc(dir->i_sb, &retries))
goto retry;
return err;
}
-static int ext3_mknod (struct inode * dir, struct dentry *dentry,
- int mode, dev_t rdev)
+static int ext4_mknod(struct inode *dir, struct dentry *dentry,
+ int mode, dev_t rdev)
{
handle_t *handle;
struct inode *inode;
return -EINVAL;
retry:
- handle = ext3_journal_start(dir, EXT3_DATA_TRANS_BLOCKS(dir->i_sb) +
- EXT3_INDEX_EXTRA_TRANS_BLOCKS + 3 +
- 2*EXT3_QUOTA_INIT_BLOCKS(dir->i_sb));
+ handle = ext4_journal_start(dir, EXT4_DATA_TRANS_BLOCKS(dir->i_sb) +
+ EXT4_INDEX_EXTRA_TRANS_BLOCKS + 3 +
+ 2*EXT4_QUOTA_INIT_BLOCKS(dir->i_sb));
if (IS_ERR(handle))
return PTR_ERR(handle);
if (IS_DIRSYNC(dir))
- handle->h_sync = 1;
+ ext4_handle_sync(handle);
- inode = ext3_new_inode (handle, dir, mode);
+ inode = ext4_new_inode(handle, dir, mode);
err = PTR_ERR(inode);
if (!IS_ERR(inode)) {
init_special_inode(inode, inode->i_mode, rdev);
-#ifdef CONFIG_EXT3_FS_XATTR
- inode->i_op = &ext3_special_inode_operations;
+#ifdef CONFIG_EXT4_FS_XATTR
+ inode->i_op = &ext4_special_inode_operations;
#endif
- err = ext3_add_nondir(handle, dentry, inode);
+ err = ext4_add_nondir(handle, dentry, inode);
}
- ext3_journal_stop(handle);
- if (err == -ENOSPC && ext3_should_retry_alloc(dir->i_sb, &retries))
+ ext4_journal_stop(handle);
+ if (err == -ENOSPC && ext4_should_retry_alloc(dir->i_sb, &retries))
goto retry;
return err;
}
-static int ext3_mkdir(struct inode * dir, struct dentry * dentry, int mode)
+static int ext4_mkdir(struct inode *dir, struct dentry *dentry, int mode)
{
handle_t *handle;
- struct inode * inode;
- struct buffer_head * dir_block;
- struct ext3_dir_entry_2 * de;
+ struct inode *inode;
+ struct buffer_head *dir_block;
+ struct ext4_dir_entry_2 *de;
int err, retries = 0;
- if (dir->i_nlink >= EXT3_LINK_MAX)
+ if (EXT4_DIR_LINK_MAX(dir))
return -EMLINK;
retry:
- handle = ext3_journal_start(dir, EXT3_DATA_TRANS_BLOCKS(dir->i_sb) +
- EXT3_INDEX_EXTRA_TRANS_BLOCKS + 3 +
- 2*EXT3_QUOTA_INIT_BLOCKS(dir->i_sb));
+ handle = ext4_journal_start(dir, EXT4_DATA_TRANS_BLOCKS(dir->i_sb) +
+ EXT4_INDEX_EXTRA_TRANS_BLOCKS + 3 +
+ 2*EXT4_QUOTA_INIT_BLOCKS(dir->i_sb));
if (IS_ERR(handle))
return PTR_ERR(handle);
if (IS_DIRSYNC(dir))
- handle->h_sync = 1;
+ ext4_handle_sync(handle);
- inode = ext3_new_inode (handle, dir, S_IFDIR | mode);
+ inode = ext4_new_inode(handle, dir, S_IFDIR | mode);
err = PTR_ERR(inode);
if (IS_ERR(inode))
goto out_stop;
- inode->i_op = &ext3_dir_inode_operations;
- inode->i_fop = &ext3_dir_operations;
- inode->i_size = EXT3_I(inode)->i_disksize = inode->i_sb->s_blocksize;
- dir_block = ext3_bread (handle, inode, 0, 1, &err);
- if (!dir_block) {
- drop_nlink(inode); /* is this nlink == 0? */
- ext3_mark_inode_dirty(handle, inode);
- iput (inode);
- goto out_stop;
- }
+ inode->i_op = &ext4_dir_inode_operations;
+ inode->i_fop = &ext4_dir_operations;
+ inode->i_size = EXT4_I(inode)->i_disksize = inode->i_sb->s_blocksize;
+ dir_block = ext4_bread(handle, inode, 0, 1, &err);
+ if (!dir_block)
+ goto out_clear_inode;
BUFFER_TRACE(dir_block, "get_write_access");
- ext3_journal_get_write_access(handle, dir_block);
- de = (struct ext3_dir_entry_2 *) dir_block->b_data;
+ ext4_journal_get_write_access(handle, dir_block);
+ de = (struct ext4_dir_entry_2 *) dir_block->b_data;
de->inode = cpu_to_le32(inode->i_ino);
de->name_len = 1;
- de->rec_len = cpu_to_le16(EXT3_DIR_REC_LEN(de->name_len));
- strcpy (de->name, ".");
- ext3_set_de_type(dir->i_sb, de, S_IFDIR);
- de = (struct ext3_dir_entry_2 *)
- ((char *) de + le16_to_cpu(de->rec_len));
+ de->rec_len = ext4_rec_len_to_disk(EXT4_DIR_REC_LEN(de->name_len));
+ strcpy(de->name, ".");
+ ext4_set_de_type(dir->i_sb, de, S_IFDIR);
+ de = ext4_next_entry(de);
de->inode = cpu_to_le32(dir->i_ino);
- de->rec_len = cpu_to_le16(inode->i_sb->s_blocksize-EXT3_DIR_REC_LEN(1));
+ de->rec_len = ext4_rec_len_to_disk(inode->i_sb->s_blocksize -
+ EXT4_DIR_REC_LEN(1));
de->name_len = 2;
- strcpy (de->name, "..");
- ext3_set_de_type(dir->i_sb, de, S_IFDIR);
+ strcpy(de->name, "..");
+ ext4_set_de_type(dir->i_sb, de, S_IFDIR);
inode->i_nlink = 2;
- BUFFER_TRACE(dir_block, "call ext3_journal_dirty_metadata");
- ext3_journal_dirty_metadata(handle, dir_block);
- brelse (dir_block);
- ext3_mark_inode_dirty(handle, inode);
- err = ext3_add_entry (handle, dentry, inode);
+ BUFFER_TRACE(dir_block, "call ext4_handle_dirty_metadata");
+ ext4_handle_dirty_metadata(handle, dir, dir_block);
+ brelse(dir_block);
+ ext4_mark_inode_dirty(handle, inode);
+ err = ext4_add_entry(handle, dentry, inode);
if (err) {
- inode->i_nlink = 0;
- ext3_mark_inode_dirty(handle, inode);
- iput (inode);
+out_clear_inode:
+ clear_nlink(inode);
+ unlock_new_inode(inode);
+ ext4_mark_inode_dirty(handle, inode);
+ iput(inode);
goto out_stop;
}
- inc_nlink(dir);
- ext3_update_dx_flag(dir);
- ext3_mark_inode_dirty(handle, dir);
+ ext4_inc_count(handle, dir);
+ ext4_update_dx_flag(dir);
+ ext4_mark_inode_dirty(handle, dir);
d_instantiate(dentry, inode);
+ unlock_new_inode(inode);
out_stop:
- ext3_journal_stop(handle);
- if (err == -ENOSPC && ext3_should_retry_alloc(dir->i_sb, &retries))
+ ext4_journal_stop(handle);
+ if (err == -ENOSPC && ext4_should_retry_alloc(dir->i_sb, &retries))
goto retry;
return err;
}
/*
* routine to check that the specified directory is empty (for rmdir)
*/
-static int empty_dir (struct inode * inode)
+static int empty_dir(struct inode *inode)
{
- unsigned long offset;
- struct buffer_head * bh;
- struct ext3_dir_entry_2 * de, * de1;
- struct super_block * sb;
+ unsigned int offset;
+ struct buffer_head *bh;
+ struct ext4_dir_entry_2 *de, *de1;
+ struct super_block *sb;
int err = 0;
sb = inode->i_sb;
- if (inode->i_size < EXT3_DIR_REC_LEN(1) + EXT3_DIR_REC_LEN(2) ||
- !(bh = ext3_bread (NULL, inode, 0, 0, &err))) {
+ if (inode->i_size < EXT4_DIR_REC_LEN(1) + EXT4_DIR_REC_LEN(2) ||
+ !(bh = ext4_bread(NULL, inode, 0, 0, &err))) {
if (err)
- ext3_error(inode->i_sb, __FUNCTION__,
+ ext4_error(inode->i_sb, __func__,
"error %d reading directory #%lu offset 0",
err, inode->i_ino);
else
- ext3_warning(inode->i_sb, __FUNCTION__,
+ ext4_warning(inode->i_sb, __func__,
"bad directory (dir #%lu) - no data block",
inode->i_ino);
return 1;
}
- de = (struct ext3_dir_entry_2 *) bh->b_data;
- de1 = (struct ext3_dir_entry_2 *)
- ((char *) de + le16_to_cpu(de->rec_len));
+ de = (struct ext4_dir_entry_2 *) bh->b_data;
+ de1 = ext4_next_entry(de);
if (le32_to_cpu(de->inode) != inode->i_ino ||
!le32_to_cpu(de1->inode) ||
- strcmp (".", de->name) ||
- strcmp ("..", de1->name)) {
- ext3_warning (inode->i_sb, "empty_dir",
- "bad directory (dir #%lu) - no `.' or `..'",
- inode->i_ino);
- brelse (bh);
+ strcmp(".", de->name) ||
+ strcmp("..", de1->name)) {
+ ext4_warning(inode->i_sb, "empty_dir",
+ "bad directory (dir #%lu) - no `.' or `..'",
+ inode->i_ino);
+ brelse(bh);
return 1;
}
- offset = le16_to_cpu(de->rec_len) + le16_to_cpu(de1->rec_len);
- de = (struct ext3_dir_entry_2 *)
- ((char *) de1 + le16_to_cpu(de1->rec_len));
- while (offset < inode->i_size ) {
+ offset = ext4_rec_len_from_disk(de->rec_len) +
+ ext4_rec_len_from_disk(de1->rec_len);
+ de = ext4_next_entry(de1);
+ while (offset < inode->i_size) {
if (!bh ||
(void *) de >= (void *) (bh->b_data+sb->s_blocksize)) {
err = 0;
- brelse (bh);
- bh = ext3_bread (NULL, inode,
- offset >> EXT3_BLOCK_SIZE_BITS(sb), 0, &err);
+ brelse(bh);
+ bh = ext4_bread(NULL, inode,
+ offset >> EXT4_BLOCK_SIZE_BITS(sb), 0, &err);
if (!bh) {
if (err)
- ext3_error(sb, __FUNCTION__,
+ ext4_error(sb, __func__,
"error %d reading directory"
- " #%lu offset %lu",
+ " #%lu offset %u",
err, inode->i_ino, offset);
offset += sb->s_blocksize;
continue;
}
- de = (struct ext3_dir_entry_2 *) bh->b_data;
+ de = (struct ext4_dir_entry_2 *) bh->b_data;
}
- if (!ext3_check_dir_entry("empty_dir", inode, de, bh, offset)) {
- de = (struct ext3_dir_entry_2 *)(bh->b_data +
+ if (!ext4_check_dir_entry("empty_dir", inode, de, bh, offset)) {
+ de = (struct ext4_dir_entry_2 *)(bh->b_data +
sb->s_blocksize);
offset = (offset | (sb->s_blocksize - 1)) + 1;
continue;
}
if (le32_to_cpu(de->inode)) {
- brelse (bh);
+ brelse(bh);
return 0;
}
- offset += le16_to_cpu(de->rec_len);
- de = (struct ext3_dir_entry_2 *)
- ((char *) de + le16_to_cpu(de->rec_len));
+ offset += ext4_rec_len_from_disk(de->rec_len);
+ de = ext4_next_entry(de);
}
- brelse (bh);
+ brelse(bh);
return 1;
}
-/* ext3_orphan_add() links an unlinked or truncated inode into a list of
+/* ext4_orphan_add() links an unlinked or truncated inode into a list of
* such inodes, starting at the superblock, in case we crash before the
* file is closed/deleted, or in case the inode truncate spans multiple
* transactions and the last transaction is not recovered after a crash.
*
* At filesystem recovery time, we walk this list deleting unlinked
- * inodes and truncating linked inodes in ext3_orphan_cleanup().
+ * inodes and truncating linked inodes in ext4_orphan_cleanup().
*/
-int ext3_orphan_add(handle_t *handle, struct inode *inode)
+int ext4_orphan_add(handle_t *handle, struct inode *inode)
{
struct super_block *sb = inode->i_sb;
- struct ext3_iloc iloc;
+ struct ext4_iloc iloc;
int err = 0, rc;
+ if (!ext4_handle_valid(handle))
+ return 0;
+
lock_super(sb);
- if (!list_empty(&EXT3_I(inode)->i_orphan))
+ if (!list_empty(&EXT4_I(inode)->i_orphan))
goto out_unlock;
/* Orphan handling is only valid for files with data blocks
* being truncated, or files being unlinked. */
/* @@@ FIXME: Observation from aviro:
- * I think I can trigger J_ASSERT in ext3_orphan_add(). We block
- * here (on lock_super()), so race with ext3_link() which might bump
+ * I think I can trigger J_ASSERT in ext4_orphan_add(). We block
+ * here (on lock_super()), so race with ext4_link() which might bump
* ->i_nlink. For, say it, character device. Not a regular file,
* not a directory, not a symlink and ->i_nlink > 0.
*/
- J_ASSERT ((S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
- S_ISLNK(inode->i_mode)) || inode->i_nlink == 0);
+ J_ASSERT((S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
+ S_ISLNK(inode->i_mode)) || inode->i_nlink == 0);
- BUFFER_TRACE(EXT3_SB(sb)->s_sbh, "get_write_access");
- err = ext3_journal_get_write_access(handle, EXT3_SB(sb)->s_sbh);
+ BUFFER_TRACE(EXT4_SB(sb)->s_sbh, "get_write_access");
+ err = ext4_journal_get_write_access(handle, EXT4_SB(sb)->s_sbh);
if (err)
goto out_unlock;
- err = ext3_reserve_inode_write(handle, inode, &iloc);
+ err = ext4_reserve_inode_write(handle, inode, &iloc);
if (err)
goto out_unlock;
/* Insert this inode at the head of the on-disk orphan list... */
- NEXT_ORPHAN(inode) = le32_to_cpu(EXT3_SB(sb)->s_es->s_last_orphan);
- EXT3_SB(sb)->s_es->s_last_orphan = cpu_to_le32(inode->i_ino);
- err = ext3_journal_dirty_metadata(handle, EXT3_SB(sb)->s_sbh);
- rc = ext3_mark_iloc_dirty(handle, inode, &iloc);
+ NEXT_ORPHAN(inode) = le32_to_cpu(EXT4_SB(sb)->s_es->s_last_orphan);
+ EXT4_SB(sb)->s_es->s_last_orphan = cpu_to_le32(inode->i_ino);
+ err = ext4_handle_dirty_metadata(handle, inode, EXT4_SB(sb)->s_sbh);
+ rc = ext4_mark_iloc_dirty(handle, inode, &iloc);
if (!err)
err = rc;
* This is safe: on error we're going to ignore the orphan list
* anyway on the next recovery. */
if (!err)
- list_add(&EXT3_I(inode)->i_orphan, &EXT3_SB(sb)->s_orphan);
+ list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan);
jbd_debug(4, "superblock will point to %lu\n", inode->i_ino);
jbd_debug(4, "orphan inode %lu will point to %d\n",
inode->i_ino, NEXT_ORPHAN(inode));
out_unlock:
unlock_super(sb);
- ext3_std_error(inode->i_sb, err);
+ ext4_std_error(inode->i_sb, err);
return err;
}
/*
- * ext3_orphan_del() removes an unlinked or truncated inode from the list
+ * ext4_orphan_del() removes an unlinked or truncated inode from the list
* of such inodes stored on disk, because it is finally being cleaned up.
*/
-int ext3_orphan_del(handle_t *handle, struct inode *inode)
+int ext4_orphan_del(handle_t *handle, struct inode *inode)
{
struct list_head *prev;
- struct ext3_inode_info *ei = EXT3_I(inode);
- struct ext3_sb_info *sbi;
- unsigned long ino_next;
- struct ext3_iloc iloc;
+ struct ext4_inode_info *ei = EXT4_I(inode);
+ struct ext4_sb_info *sbi;
+ __u32 ino_next;
+ struct ext4_iloc iloc;
int err = 0;
+ if (!ext4_handle_valid(handle))
+ return 0;
+
lock_super(inode->i_sb);
if (list_empty(&ei->i_orphan)) {
unlock_super(inode->i_sb);
ino_next = NEXT_ORPHAN(inode);
prev = ei->i_orphan.prev;
- sbi = EXT3_SB(inode->i_sb);
+ sbi = EXT4_SB(inode->i_sb);
jbd_debug(4, "remove inode %lu from orphan list\n", inode->i_ino);
* transaction handle with which to update the orphan list on
* disk, but we still need to remove the inode from the linked
* list in memory. */
- if (!handle)
+ if (sbi->s_journal && !handle)
goto out;
- err = ext3_reserve_inode_write(handle, inode, &iloc);
+ err = ext4_reserve_inode_write(handle, inode, &iloc);
if (err)
goto out_err;
if (prev == &sbi->s_orphan) {
- jbd_debug(4, "superblock will point to %lu\n", ino_next);
+ jbd_debug(4, "superblock will point to %u\n", ino_next);
BUFFER_TRACE(sbi->s_sbh, "get_write_access");
- err = ext3_journal_get_write_access(handle, sbi->s_sbh);
+ err = ext4_journal_get_write_access(handle, sbi->s_sbh);
if (err)
goto out_brelse;
sbi->s_es->s_last_orphan = cpu_to_le32(ino_next);
- err = ext3_journal_dirty_metadata(handle, sbi->s_sbh);
+ err = ext4_handle_dirty_metadata(handle, inode, sbi->s_sbh);
} else {
- struct ext3_iloc iloc2;
+ struct ext4_iloc iloc2;
struct inode *i_prev =
- &list_entry(prev, struct ext3_inode_info, i_orphan)->vfs_inode;
+ &list_entry(prev, struct ext4_inode_info, i_orphan)->vfs_inode;
- jbd_debug(4, "orphan inode %lu will point to %lu\n",
+ jbd_debug(4, "orphan inode %lu will point to %u\n",
i_prev->i_ino, ino_next);
- err = ext3_reserve_inode_write(handle, i_prev, &iloc2);
+ err = ext4_reserve_inode_write(handle, i_prev, &iloc2);
if (err)
goto out_brelse;
NEXT_ORPHAN(i_prev) = ino_next;
- err = ext3_mark_iloc_dirty(handle, i_prev, &iloc2);
+ err = ext4_mark_iloc_dirty(handle, i_prev, &iloc2);
}
if (err)
goto out_brelse;
NEXT_ORPHAN(inode) = 0;
- err = ext3_mark_iloc_dirty(handle, inode, &iloc);
+ err = ext4_mark_iloc_dirty(handle, inode, &iloc);
out_err:
- ext3_std_error(inode->i_sb, err);
+ ext4_std_error(inode->i_sb, err);
out:
unlock_super(inode->i_sb);
return err;
goto out_err;
}
-static int ext3_rmdir (struct inode * dir, struct dentry *dentry)
+static int ext4_rmdir(struct inode *dir, struct dentry *dentry)
{
int retval;
- struct inode * inode;
- struct buffer_head * bh;
- struct ext3_dir_entry_2 * de;
+ struct inode *inode;
+ struct buffer_head *bh;
+ struct ext4_dir_entry_2 *de;
handle_t *handle;
/* Initialize quotas before so that eventual writes go in
* separate transaction */
DQUOT_INIT(dentry->d_inode);
- handle = ext3_journal_start(dir, EXT3_DELETE_TRANS_BLOCKS(dir->i_sb));
+ handle = ext4_journal_start(dir, EXT4_DELETE_TRANS_BLOCKS(dir->i_sb));
if (IS_ERR(handle))
return PTR_ERR(handle);
retval = -ENOENT;
- bh = ext3_find_entry (dentry, &de);
+ bh = ext4_find_entry(dir, &dentry->d_name, &de);
if (!bh)
goto end_rmdir;
if (IS_DIRSYNC(dir))
- handle->h_sync = 1;
+ ext4_handle_sync(handle);
inode = dentry->d_inode;
goto end_rmdir;
retval = -ENOTEMPTY;
- if (!empty_dir (inode))
+ if (!empty_dir(inode))
goto end_rmdir;
- retval = ext3_delete_entry(handle, dir, de, bh);
+ retval = ext4_delete_entry(handle, dir, de, bh);
if (retval)
goto end_rmdir;
- if (inode->i_nlink != 2)
- ext3_warning (inode->i_sb, "ext3_rmdir",
- "empty directory has nlink!=2 (%d)",
- inode->i_nlink);
+ if (!EXT4_DIR_LINK_EMPTY(inode))
+ ext4_warning(inode->i_sb, "ext4_rmdir",
+ "empty directory has too many links (%d)",
+ inode->i_nlink);
inode->i_version++;
clear_nlink(inode);
/* There's no need to set i_disksize: the fact that i_nlink is
* zero will ensure that the right thing happens during any
* recovery. */
inode->i_size = 0;
- ext3_orphan_add(handle, inode);
- inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME_SEC;
- ext3_mark_inode_dirty(handle, inode);
- drop_nlink(dir);
- ext3_update_dx_flag(dir);
- ext3_mark_inode_dirty(handle, dir);
+ ext4_orphan_add(handle, inode);
+ inode->i_ctime = dir->i_ctime = dir->i_mtime = ext4_current_time(inode);
+ ext4_mark_inode_dirty(handle, inode);
+ ext4_dec_count(handle, dir);
+ ext4_update_dx_flag(dir);
+ ext4_mark_inode_dirty(handle, dir);
end_rmdir:
- ext3_journal_stop(handle);
- brelse (bh);
+ ext4_journal_stop(handle);
+ brelse(bh);
return retval;
}
-static int ext3_unlink(struct inode * dir, struct dentry *dentry)
+static int ext4_unlink(struct inode *dir, struct dentry *dentry)
{
int retval;
- struct inode * inode;
- struct buffer_head * bh;
- struct ext3_dir_entry_2 * de;
+ struct inode *inode;
+ struct buffer_head *bh;
+ struct ext4_dir_entry_2 *de;
handle_t *handle;
/* Initialize quotas before so that eventual writes go
* in separate transaction */
DQUOT_INIT(dentry->d_inode);
- handle = ext3_journal_start(dir, EXT3_DELETE_TRANS_BLOCKS(dir->i_sb));
+ handle = ext4_journal_start(dir, EXT4_DELETE_TRANS_BLOCKS(dir->i_sb));
if (IS_ERR(handle))
return PTR_ERR(handle);
if (IS_DIRSYNC(dir))
- handle->h_sync = 1;
+ ext4_handle_sync(handle);
retval = -ENOENT;
- bh = ext3_find_entry (dentry, &de);
+ bh = ext4_find_entry(dir, &dentry->d_name, &de);
if (!bh)
goto end_unlink;
goto end_unlink;
if (!inode->i_nlink) {
- ext3_warning (inode->i_sb, "ext3_unlink",
- "Deleting nonexistent file (%lu), %d",
- inode->i_ino, inode->i_nlink);
+ ext4_warning(inode->i_sb, "ext4_unlink",
+ "Deleting nonexistent file (%lu), %d",
+ inode->i_ino, inode->i_nlink);
inode->i_nlink = 1;
}
- retval = ext3_delete_entry(handle, dir, de, bh);
+ retval = ext4_delete_entry(handle, dir, de, bh);
if (retval)
goto end_unlink;
- dir->i_ctime = dir->i_mtime = CURRENT_TIME_SEC;
- ext3_update_dx_flag(dir);
- ext3_mark_inode_dirty(handle, dir);
+ dir->i_ctime = dir->i_mtime = ext4_current_time(dir);
+ ext4_update_dx_flag(dir);
+ ext4_mark_inode_dirty(handle, dir);
drop_nlink(inode);
if (!inode->i_nlink)
- ext3_orphan_add(handle, inode);
- inode->i_ctime = dir->i_ctime;
- ext3_mark_inode_dirty(handle, inode);
+ ext4_orphan_add(handle, inode);
+ inode->i_ctime = ext4_current_time(inode);
+ ext4_mark_inode_dirty(handle, inode);
retval = 0;
end_unlink:
- ext3_journal_stop(handle);
- brelse (bh);
+ ext4_journal_stop(handle);
+ brelse(bh);
return retval;
}
-static int ext3_symlink (struct inode * dir,
- struct dentry *dentry, const char * symname)
+static int ext4_symlink(struct inode *dir,
+ struct dentry *dentry, const char *symname)
{
handle_t *handle;
- struct inode * inode;
+ struct inode *inode;
int l, err, retries = 0;
l = strlen(symname)+1;
return -ENAMETOOLONG;
retry:
- handle = ext3_journal_start(dir, EXT3_DATA_TRANS_BLOCKS(dir->i_sb) +
- EXT3_INDEX_EXTRA_TRANS_BLOCKS + 5 +
- 2*EXT3_QUOTA_INIT_BLOCKS(dir->i_sb));
+ handle = ext4_journal_start(dir, EXT4_DATA_TRANS_BLOCKS(dir->i_sb) +
+ EXT4_INDEX_EXTRA_TRANS_BLOCKS + 5 +
+ 2*EXT4_QUOTA_INIT_BLOCKS(dir->i_sb));
if (IS_ERR(handle))
return PTR_ERR(handle);
if (IS_DIRSYNC(dir))
- handle->h_sync = 1;
+ ext4_handle_sync(handle);
- inode = ext3_new_inode (handle, dir, S_IFLNK|S_IRWXUGO);
+ inode = ext4_new_inode(handle, dir, S_IFLNK|S_IRWXUGO);
err = PTR_ERR(inode);
if (IS_ERR(inode))
goto out_stop;
- if (l > sizeof (EXT3_I(inode)->i_data)) {
- inode->i_op = &ext3_symlink_inode_operations;
- ext3_set_aops(inode);
+ if (l > sizeof(EXT4_I(inode)->i_data)) {
+ inode->i_op = &ext4_symlink_inode_operations;
+ ext4_set_aops(inode);
/*
- * page_symlink() calls into ext3_prepare/commit_write.
+ * page_symlink() calls into ext4_prepare/commit_write.
* We have a transaction open. All is sweetness. It also sets
* i_size in generic_commit_write().
*/
- err = __page_symlink(inode, symname, l,
- mapping_gfp_mask(inode->i_mapping) & ~__GFP_FS);
+ err = __page_symlink(inode, symname, l, 1);
if (err) {
- ext3_dec_count(handle, inode);
- ext3_mark_inode_dirty(handle, inode);
- iput (inode);
+ clear_nlink(inode);
+ unlock_new_inode(inode);
+ ext4_mark_inode_dirty(handle, inode);
+ iput(inode);
goto out_stop;
}
} else {
- inode->i_op = &ext3_fast_symlink_inode_operations;
- memcpy((char*)&EXT3_I(inode)->i_data,symname,l);
+ /* clear the extent format for fast symlink */
+ EXT4_I(inode)->i_flags &= ~EXT4_EXTENTS_FL;
+ inode->i_op = &ext4_fast_symlink_inode_operations;
+ memcpy((char *)&EXT4_I(inode)->i_data, symname, l);
inode->i_size = l-1;
}
- EXT3_I(inode)->i_disksize = inode->i_size;
- err = ext3_add_nondir(handle, dentry, inode);
+ EXT4_I(inode)->i_disksize = inode->i_size;
+ err = ext4_add_nondir(handle, dentry, inode);
out_stop:
- ext3_journal_stop(handle);
- if (err == -ENOSPC && ext3_should_retry_alloc(dir->i_sb, &retries))
+ ext4_journal_stop(handle);
+ if (err == -ENOSPC && ext4_should_retry_alloc(dir->i_sb, &retries))
goto retry;
return err;
}
-static int ext3_link (struct dentry * old_dentry,
- struct inode * dir, struct dentry *dentry)
+static int ext4_link(struct dentry *old_dentry,
+ struct inode *dir, struct dentry *dentry)
{
handle_t *handle;
struct inode *inode = old_dentry->d_inode;
int err, retries = 0;
- if (inode->i_nlink >= EXT3_LINK_MAX)
+ if (EXT4_DIR_LINK_MAX(inode))
return -EMLINK;
+ /*
+ * Return -ENOENT if we've raced with unlink and i_nlink is 0. Doing
+ * otherwise has the potential to corrupt the orphan inode list.
+ */
+ if (inode->i_nlink == 0)
+ return -ENOENT;
+
retry:
- handle = ext3_journal_start(dir, EXT3_DATA_TRANS_BLOCKS(dir->i_sb) +
- EXT3_INDEX_EXTRA_TRANS_BLOCKS);
+ handle = ext4_journal_start(dir, EXT4_DATA_TRANS_BLOCKS(dir->i_sb) +
+ EXT4_INDEX_EXTRA_TRANS_BLOCKS);
if (IS_ERR(handle))
return PTR_ERR(handle);
if (IS_DIRSYNC(dir))
- handle->h_sync = 1;
+ ext4_handle_sync(handle);
- inode->i_ctime = CURRENT_TIME_SEC;
- ext3_inc_count(handle, inode);
+ inode->i_ctime = ext4_current_time(inode);
+ ext4_inc_count(handle, inode);
atomic_inc(&inode->i_count);
- err = ext3_add_nondir(handle, dentry, inode);
- ext3_journal_stop(handle);
- if (err == -ENOSPC && ext3_should_retry_alloc(dir->i_sb, &retries))
+ err = ext4_add_entry(handle, dentry, inode);
+ if (!err) {
+ ext4_mark_inode_dirty(handle, inode);
+ d_instantiate(dentry, inode);
+ } else {
+ drop_nlink(inode);
+ iput(inode);
+ }
+ ext4_journal_stop(handle);
+ if (err == -ENOSPC && ext4_should_retry_alloc(dir->i_sb, &retries))
goto retry;
return err;
}
#define PARENT_INO(buffer) \
- ((struct ext3_dir_entry_2 *) ((char *) buffer + \
- le16_to_cpu(((struct ext3_dir_entry_2 *) buffer)->rec_len)))->inode
+ (ext4_next_entry((struct ext4_dir_entry_2 *)(buffer))->inode)
/*
* Anybody can rename anything with this: the permission checks are left to the
* higher-level routines.
*/
-static int ext3_rename (struct inode * old_dir, struct dentry *old_dentry,
- struct inode * new_dir,struct dentry *new_dentry)
+static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry,
+ struct inode *new_dir, struct dentry *new_dentry)
{
handle_t *handle;
- struct inode * old_inode, * new_inode;
- struct buffer_head * old_bh, * new_bh, * dir_bh;
- struct ext3_dir_entry_2 * old_de, * new_de;
+ struct inode *old_inode, *new_inode;
+ struct buffer_head *old_bh, *new_bh, *dir_bh;
+ struct ext4_dir_entry_2 *old_de, *new_de;
int retval;
old_bh = new_bh = dir_bh = NULL;
* in separate transaction */
if (new_dentry->d_inode)
DQUOT_INIT(new_dentry->d_inode);
- handle = ext3_journal_start(old_dir, 2 *
- EXT3_DATA_TRANS_BLOCKS(old_dir->i_sb) +
- EXT3_INDEX_EXTRA_TRANS_BLOCKS + 2);
+ handle = ext4_journal_start(old_dir, 2 *
+ EXT4_DATA_TRANS_BLOCKS(old_dir->i_sb) +
+ EXT4_INDEX_EXTRA_TRANS_BLOCKS + 2);
if (IS_ERR(handle))
return PTR_ERR(handle);
if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
- handle->h_sync = 1;
+ ext4_handle_sync(handle);
- old_bh = ext3_find_entry (old_dentry, &old_de);
+ old_bh = ext4_find_entry(old_dir, &old_dentry->d_name, &old_de);
/*
* Check for inode number is _not_ due to possible IO errors.
* We might rmdir the source, keep it as pwd of some process
goto end_rename;
new_inode = new_dentry->d_inode;
- new_bh = ext3_find_entry (new_dentry, &new_de);
+ new_bh = ext4_find_entry(new_dir, &new_dentry->d_name, &new_de);
if (new_bh) {
if (!new_inode) {
- brelse (new_bh);
+ brelse(new_bh);
new_bh = NULL;
}
}
if (S_ISDIR(old_inode->i_mode)) {
if (new_inode) {
retval = -ENOTEMPTY;
- if (!empty_dir (new_inode))
+ if (!empty_dir(new_inode))
goto end_rename;
}
retval = -EIO;
- dir_bh = ext3_bread (handle, old_inode, 0, 0, &retval);
+ dir_bh = ext4_bread(handle, old_inode, 0, 0, &retval);
if (!dir_bh)
goto end_rename;
if (le32_to_cpu(PARENT_INO(dir_bh->b_data)) != old_dir->i_ino)
goto end_rename;
retval = -EMLINK;
- if (!new_inode && new_dir!=old_dir &&
- new_dir->i_nlink >= EXT3_LINK_MAX)
+ if (!new_inode && new_dir != old_dir &&
+ new_dir->i_nlink >= EXT4_LINK_MAX)
goto end_rename;
}
if (!new_bh) {
- retval = ext3_add_entry (handle, new_dentry, old_inode);
+ retval = ext4_add_entry(handle, new_dentry, old_inode);
if (retval)
goto end_rename;
} else {
BUFFER_TRACE(new_bh, "get write access");
- ext3_journal_get_write_access(handle, new_bh);
+ ext4_journal_get_write_access(handle, new_bh);
new_de->inode = cpu_to_le32(old_inode->i_ino);
- if (EXT3_HAS_INCOMPAT_FEATURE(new_dir->i_sb,
- EXT3_FEATURE_INCOMPAT_FILETYPE))
+ if (EXT4_HAS_INCOMPAT_FEATURE(new_dir->i_sb,
+ EXT4_FEATURE_INCOMPAT_FILETYPE))
new_de->file_type = old_de->file_type;
new_dir->i_version++;
- BUFFER_TRACE(new_bh, "call ext3_journal_dirty_metadata");
- ext3_journal_dirty_metadata(handle, new_bh);
+ new_dir->i_ctime = new_dir->i_mtime =
+ ext4_current_time(new_dir);
+ ext4_mark_inode_dirty(handle, new_dir);
+ BUFFER_TRACE(new_bh, "call ext4_handle_dirty_metadata");
+ ext4_handle_dirty_metadata(handle, new_dir, new_bh);
brelse(new_bh);
new_bh = NULL;
}
* Like most other Unix systems, set the ctime for inodes on a
* rename.
*/
- old_inode->i_ctime = CURRENT_TIME_SEC;
- ext3_mark_inode_dirty(handle, old_inode);
+ old_inode->i_ctime = ext4_current_time(old_inode);
+ ext4_mark_inode_dirty(handle, old_inode);
/*
* ok, that's it
if (le32_to_cpu(old_de->inode) != old_inode->i_ino ||
old_de->name_len != old_dentry->d_name.len ||
strncmp(old_de->name, old_dentry->d_name.name, old_de->name_len) ||
- (retval = ext3_delete_entry(handle, old_dir,
+ (retval = ext4_delete_entry(handle, old_dir,
old_de, old_bh)) == -ENOENT) {
/* old_de could have moved from under us during htree split, so
* make sure that we are deleting the right entry. We might
* also be pointing to a stale entry in the unused part of
* old_bh so just checking inum and the name isn't enough. */
struct buffer_head *old_bh2;
- struct ext3_dir_entry_2 *old_de2;
+ struct ext4_dir_entry_2 *old_de2;
- old_bh2 = ext3_find_entry(old_dentry, &old_de2);
+ old_bh2 = ext4_find_entry(old_dir, &old_dentry->d_name, &old_de2);
if (old_bh2) {
- retval = ext3_delete_entry(handle, old_dir,
+ retval = ext4_delete_entry(handle, old_dir,
old_de2, old_bh2);
brelse(old_bh2);
}
}
if (retval) {
- ext3_warning(old_dir->i_sb, "ext3_rename",
+ ext4_warning(old_dir->i_sb, "ext4_rename",
"Deleting old file (%lu), %d, error=%d",
old_dir->i_ino, old_dir->i_nlink, retval);
}
if (new_inode) {
- drop_nlink(new_inode);
- new_inode->i_ctime = CURRENT_TIME_SEC;
+ ext4_dec_count(handle, new_inode);
+ new_inode->i_ctime = ext4_current_time(new_inode);
}
- old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME_SEC;
- ext3_update_dx_flag(old_dir);
+ old_dir->i_ctime = old_dir->i_mtime = ext4_current_time(old_dir);
+ ext4_update_dx_flag(old_dir);
if (dir_bh) {
BUFFER_TRACE(dir_bh, "get_write_access");
- ext3_journal_get_write_access(handle, dir_bh);
+ ext4_journal_get_write_access(handle, dir_bh);
PARENT_INO(dir_bh->b_data) = cpu_to_le32(new_dir->i_ino);
- BUFFER_TRACE(dir_bh, "call ext3_journal_dirty_metadata");
- ext3_journal_dirty_metadata(handle, dir_bh);
- drop_nlink(old_dir);
+ BUFFER_TRACE(dir_bh, "call ext4_handle_dirty_metadata");
+ ext4_handle_dirty_metadata(handle, old_dir, dir_bh);
+ ext4_dec_count(handle, old_dir);
if (new_inode) {
- drop_nlink(new_inode);
+ /* checked empty_dir above, can't have another parent,
+ * ext4_dec_count() won't work for many-linked dirs */
+ new_inode->i_nlink = 0;
} else {
- inc_nlink(new_dir);
- ext3_update_dx_flag(new_dir);
- ext3_mark_inode_dirty(handle, new_dir);
+ ext4_inc_count(handle, new_dir);
+ ext4_update_dx_flag(new_dir);
+ ext4_mark_inode_dirty(handle, new_dir);
}
}
- ext3_mark_inode_dirty(handle, old_dir);
+ ext4_mark_inode_dirty(handle, old_dir);
if (new_inode) {
- ext3_mark_inode_dirty(handle, new_inode);
+ ext4_mark_inode_dirty(handle, new_inode);
if (!new_inode->i_nlink)
- ext3_orphan_add(handle, new_inode);
+ ext4_orphan_add(handle, new_inode);
}
retval = 0;
end_rename:
- brelse (dir_bh);
- brelse (old_bh);
- brelse (new_bh);
- ext3_journal_stop(handle);
+ brelse(dir_bh);
+ brelse(old_bh);
+ brelse(new_bh);
+ ext4_journal_stop(handle);
return retval;
}
/*
* directories can handle most operations...
*/
-struct inode_operations ext3_dir_inode_operations = {
- .create = ext3_create,
- .lookup = ext3_lookup,
- .link = ext3_link,
- .unlink = ext3_unlink,
- .symlink = ext3_symlink,
- .mkdir = ext3_mkdir,
- .rmdir = ext3_rmdir,
- .mknod = ext3_mknod,
- .rename = ext3_rename,
- .setattr = ext3_setattr,
-#ifdef CONFIG_EXT3_FS_XATTR
+const struct inode_operations ext4_dir_inode_operations = {
+ .create = ext4_create,
+ .lookup = ext4_lookup,
+ .link = ext4_link,
+ .unlink = ext4_unlink,
+ .symlink = ext4_symlink,
+ .mkdir = ext4_mkdir,
+ .rmdir = ext4_rmdir,
+ .mknod = ext4_mknod,
+ .rename = ext4_rename,
+ .setattr = ext4_setattr,
+#ifdef CONFIG_EXT4_FS_XATTR
.setxattr = generic_setxattr,
.getxattr = generic_getxattr,
- .listxattr = ext3_listxattr,
+ .listxattr = ext4_listxattr,
.removexattr = generic_removexattr,
#endif
- .permission = ext3_permission,
+ .permission = ext4_permission,
};
-struct inode_operations ext3_special_inode_operations = {
- .setattr = ext3_setattr,
-#ifdef CONFIG_EXT3_FS_XATTR
+const struct inode_operations ext4_special_inode_operations = {
+ .setattr = ext4_setattr,
+#ifdef CONFIG_EXT4_FS_XATTR
.setxattr = generic_setxattr,
.getxattr = generic_getxattr,
- .listxattr = ext3_listxattr,
+ .listxattr = ext4_listxattr,
.removexattr = generic_removexattr,
#endif
- .permission = ext3_permission,
+ .permission = ext4_permission,
};
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff