/*
* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
- * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
+ * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License v.2.
+ * of the GNU General Public License version 2.
*/
/*
-* Implements Extendible Hashing as described in:
-* "Extendible Hashing" by Fagin, et al in
-* __ACM Trans. on Database Systems__, Sept 1979.
-*
-*
-* Here's the layout of dirents which is essentially the same as that of ext2
-* within a single block. The field de_name_len is the number of bytes
-* actually required for the name (no null terminator). The field de_rec_len
-* is the number of bytes allocated to the dirent. The offset of the next
-* dirent in the block is (dirent + dirent->de_rec_len). When a dirent is
-* deleted, the preceding dirent inherits its allocated space, ie
-* prev->de_rec_len += deleted->de_rec_len. Since the next dirent is obtained
-* by adding de_rec_len to the current dirent, this essentially causes the
-* deleted dirent to get jumped over when iterating through all the dirents.
-*
-* When deleting the first dirent in a block, there is no previous dirent so
-* the field de_ino is set to zero to designate it as deleted. When allocating
-* a dirent, gfs2_dirent_alloc iterates through the dirents in a block. If the
-* first dirent has (de_ino == 0) and de_rec_len is large enough, this first
-* dirent is allocated. Otherwise it must go through all the 'used' dirents
-* searching for one in which the amount of total space minus the amount of
-* used space will provide enough space for the new dirent.
-*
-* There are two types of blocks in which dirents reside. In a stuffed dinode,
-* the dirents begin at offset sizeof(struct gfs2_dinode) from the beginning of
-* the block. In leaves, they begin at offset sizeof(struct gfs2_leaf) from the
-* beginning of the leaf block. The dirents reside in leaves when
-*
-* dip->i_di.di_flags & GFS2_DIF_EXHASH is true
-*
-* Otherwise, the dirents are "linear", within a single stuffed dinode block.
-*
-* When the dirents are in leaves, the actual contents of the directory file are
-* used as an array of 64-bit block pointers pointing to the leaf blocks. The
-* dirents are NOT in the directory file itself. There can be more than one block
-* pointer in the array that points to the same leaf. In fact, when a directory
-* is first converted from linear to exhash, all of the pointers point to the
-* same leaf.
-*
-* When a leaf is completely full, the size of the hash table can be
-* doubled unless it is already at the maximum size which is hard coded into
-* GFS2_DIR_MAX_DEPTH. After that, leaves are chained together in a linked list,
-* but never before the maximum hash table size has been reached.
-*/
-
-#include <linux/sched.h>
+ * Implements Extendible Hashing as described in:
+ * "Extendible Hashing" by Fagin, et al in
+ * __ACM Trans. on Database Systems__, Sept 1979.
+ *
+ *
+ * Here's the layout of dirents which is essentially the same as that of ext2
+ * within a single block. The field de_name_len is the number of bytes
+ * actually required for the name (no null terminator). The field de_rec_len
+ * is the number of bytes allocated to the dirent. The offset of the next
+ * dirent in the block is (dirent + dirent->de_rec_len). When a dirent is
+ * deleted, the preceding dirent inherits its allocated space, ie
+ * prev->de_rec_len += deleted->de_rec_len. Since the next dirent is obtained
+ * by adding de_rec_len to the current dirent, this essentially causes the
+ * deleted dirent to get jumped over when iterating through all the dirents.
+ *
+ * When deleting the first dirent in a block, there is no previous dirent so
+ * the field de_ino is set to zero to designate it as deleted. When allocating
+ * a dirent, gfs2_dirent_alloc iterates through the dirents in a block. If the
+ * first dirent has (de_ino == 0) and de_rec_len is large enough, this first
+ * dirent is allocated. Otherwise it must go through all the 'used' dirents
+ * searching for one in which the amount of total space minus the amount of
+ * used space will provide enough space for the new dirent.
+ *
+ * There are two types of blocks in which dirents reside. In a stuffed dinode,
+ * the dirents begin at offset sizeof(struct gfs2_dinode) from the beginning of
+ * the block. In leaves, they begin at offset sizeof(struct gfs2_leaf) from the
+ * beginning of the leaf block. The dirents reside in leaves when
+ *
+ * dip->i_di.di_flags & GFS2_DIF_EXHASH is true
+ *
+ * Otherwise, the dirents are "linear", within a single stuffed dinode block.
+ *
+ * When the dirents are in leaves, the actual contents of the directory file are
+ * used as an array of 64-bit block pointers pointing to the leaf blocks. The
+ * dirents are NOT in the directory file itself. There can be more than one
+ * block pointer in the array that points to the same leaf. In fact, when a
+ * directory is first converted from linear to exhash, all of the pointers
+ * point to the same leaf.
+ *
+ * When a leaf is completely full, the size of the hash table can be
+ * doubled unless it is already at the maximum size which is hard coded into
+ * GFS2_DIR_MAX_DEPTH. After that, leaves are chained together in a linked list,
+ * but never before the maximum hash table size has been reached.
+ */
+
#include <linux/slab.h>
#include <linux/spinlock.h>
-#include <linux/completion.h>
#include <linux/buffer_head.h>
#include <linux/sort.h>
#include <linux/gfs2_ondisk.h>
#include <linux/crc32.h>
-#include <asm/semaphore.h>
+#include <linux/vmalloc.h>
+#include <linux/lm_interface.h>
#include "gfs2.h"
-#include "lm_interface.h"
#include "incore.h"
#include "dir.h"
#include "glock.h"
#define IS_LEAF 1 /* Hashed (leaf) directory */
#define IS_DINODE 2 /* Linear (stuffed dinode block) directory */
-#if 1
-#define gfs2_disk_hash2offset(h) (((uint64_t)(h)) >> 1)
-#define gfs2_dir_offset2hash(p) ((uint32_t)(((uint64_t)(p)) << 1))
-#else
-#define gfs2_disk_hash2offset(h) (((uint64_t)(h)))
-#define gfs2_dir_offset2hash(p) ((uint32_t)(((uint64_t)(p))))
-#endif
+#define gfs2_disk_hash2offset(h) (((u64)(h)) >> 1)
+#define gfs2_dir_offset2hash(p) ((u32)(((u64)(p)) << 1))
-typedef int (*leaf_call_t) (struct gfs2_inode *dip,
- uint32_t index, uint32_t len, uint64_t leaf_no,
- void *data);
+typedef int (*leaf_call_t) (struct gfs2_inode *dip, u32 index, u32 len,
+ u64 leaf_no, void *data);
+typedef int (*gfs2_dscan_t)(const struct gfs2_dirent *dent,
+ const struct qstr *name, void *opaque);
-int gfs2_dir_get_buffer(struct gfs2_inode *ip, uint64_t block, int new,
- struct buffer_head **bhp)
+
+int gfs2_dir_get_new_buffer(struct gfs2_inode *ip, u64 block,
+ struct buffer_head **bhp)
{
struct buffer_head *bh;
- int error = 0;
-
- if (new) {
- bh = gfs2_meta_new(ip->i_gl, block);
- gfs2_trans_add_bh(ip->i_gl, bh, 1);
- gfs2_metatype_set(bh, GFS2_METATYPE_JD, GFS2_FORMAT_JD);
- gfs2_buffer_clear_tail(bh, sizeof(struct gfs2_meta_header));
- } else {
- error = gfs2_meta_read(ip->i_gl, block, DIO_START | DIO_WAIT,
- &bh);
- if (error)
- return error;
- if (gfs2_metatype_check(ip->i_sbd, bh, GFS2_METATYPE_JD)) {
- brelse(bh);
- return -EIO;
- }
- }
+ bh = gfs2_meta_new(ip->i_gl, block);
+ gfs2_trans_add_bh(ip->i_gl, bh, 1);
+ gfs2_metatype_set(bh, GFS2_METATYPE_JD, GFS2_FORMAT_JD);
+ gfs2_buffer_clear_tail(bh, sizeof(struct gfs2_meta_header));
*bhp = bh;
return 0;
}
+static int gfs2_dir_get_existing_buffer(struct gfs2_inode *ip, u64 block,
+ struct buffer_head **bhp)
+{
+ struct buffer_head *bh;
+ int error;
+ error = gfs2_meta_read(ip->i_gl, block, DIO_WAIT, &bh);
+ if (error)
+ return error;
+ if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), bh, GFS2_METATYPE_JD)) {
+ brelse(bh);
+ return -EIO;
+ }
+ *bhp = bh;
+ return 0;
+}
static int gfs2_dir_write_stuffed(struct gfs2_inode *ip, const char *buf,
unsigned int offset, unsigned int size)
-
{
struct buffer_head *dibh;
int error;
memcpy(dibh->b_data + offset + sizeof(struct gfs2_dinode), buf, size);
if (ip->i_di.di_size < offset + size)
ip->i_di.di_size = offset + size;
- ip->i_di.di_mtime = ip->i_di.di_ctime = get_seconds();
- gfs2_dinode_out(&ip->i_di, dibh->b_data);
+ ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME_SEC;
+ gfs2_dinode_out(ip, dibh->b_data);
brelse(dibh);
* Returns: The number of bytes correctly written or error code
*/
static int gfs2_dir_write_data(struct gfs2_inode *ip, const char *buf,
- uint64_t offset, unsigned int size)
+ u64 offset, unsigned int size)
{
- struct gfs2_sbd *sdp = ip->i_sbd;
+ struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
struct buffer_head *dibh;
- uint64_t lblock, dblock;
- uint32_t extlen = 0;
+ u64 lblock, dblock;
+ u32 extlen = 0;
unsigned int o;
int copied = 0;
int error = 0;
return -EINVAL;
if (gfs2_is_stuffed(ip)) {
- error = gfs2_unstuff_dinode(ip, NULL, NULL);
+ error = gfs2_unstuff_dinode(ip, NULL);
if (error)
return error;
}
while (copied < size) {
unsigned int amount;
struct buffer_head *bh;
- int new;
+ int new = 0;
amount = size - copied;
if (amount > sdp->sd_sb.sb_bsize - o)
if (!extlen) {
new = 1;
- error = gfs2_block_map(ip, lblock, &new, &dblock,
- &extlen);
+ error = gfs2_extent_map(&ip->i_inode, lblock, &new,
+ &dblock, &extlen);
if (error)
goto fail;
error = -EIO;
goto fail;
}
- error = gfs2_dir_get_buffer(ip, dblock,
- (amount == sdp->sd_jbsize) ?
- 1 : new, &bh);
+ if (amount == sdp->sd_jbsize || new)
+ error = gfs2_dir_get_new_buffer(ip, dblock, &bh);
+ else
+ error = gfs2_dir_get_existing_buffer(ip, dblock, &bh);
+
if (error)
goto fail;
gfs2_trans_add_bh(ip->i_gl, bh, 1);
memcpy(bh->b_data + o, buf, amount);
brelse(bh);
- if (error)
- goto fail;
+ buf += amount;
copied += amount;
lblock++;
dblock++;
if (ip->i_di.di_size < offset + copied)
ip->i_di.di_size = offset + copied;
- ip->i_di.di_mtime = ip->i_di.di_ctime = get_seconds();
+ ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME_SEC;
gfs2_trans_add_bh(ip->i_gl, dibh, 1);
- gfs2_dinode_out(&ip->i_di, dibh->b_data);
+ gfs2_dinode_out(ip, dibh->b_data);
brelse(dibh);
return copied;
}
static int gfs2_dir_read_stuffed(struct gfs2_inode *ip, char *buf,
- unsigned int offset, unsigned int size)
+ u64 offset, unsigned int size)
{
struct buffer_head *dibh;
int error;
*
* Returns: The amount of data actually copied or the error
*/
-static int gfs2_dir_read_data(struct gfs2_inode *ip, char *buf,
- uint64_t offset, unsigned int size)
+static int gfs2_dir_read_data(struct gfs2_inode *ip, char *buf, u64 offset,
+ unsigned int size, unsigned ra)
{
- struct gfs2_sbd *sdp = ip->i_sbd;
- uint64_t lblock, dblock;
- uint32_t extlen = 0;
+ struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
+ u64 lblock, dblock;
+ u32 extlen = 0;
unsigned int o;
int copied = 0;
int error = 0;
if (offset >= ip->i_di.di_size)
return 0;
- if ((offset + size) > ip->i_di.di_size)
+ if (offset + size > ip->i_di.di_size)
size = ip->i_di.di_size - offset;
if (!size)
return 0;
if (gfs2_is_stuffed(ip))
- return gfs2_dir_read_stuffed(ip, buf, (unsigned int)offset,
- size);
+ return gfs2_dir_read_stuffed(ip, buf, offset, size);
if (gfs2_assert_warn(sdp, gfs2_is_jdata(ip)))
return -EINVAL;
if (!extlen) {
new = 0;
- error = gfs2_block_map(ip, lblock, &new, &dblock,
- &extlen);
- if (error)
+ error = gfs2_extent_map(&ip->i_inode, lblock, &new,
+ &dblock, &extlen);
+ if (error || !dblock)
goto fail;
- }
-
- if (extlen > 1)
- gfs2_meta_ra(ip->i_gl, dblock, extlen);
-
- if (dblock) {
- error = gfs2_dir_get_buffer(ip, dblock, new, &bh);
+ BUG_ON(extlen < 1);
+ if (!ra)
+ extlen = 1;
+ bh = gfs2_meta_ra(ip->i_gl, dblock, extlen);
+ } else {
+ error = gfs2_meta_read(ip->i_gl, dblock, DIO_WAIT, &bh);
if (error)
goto fail;
- dblock++;
- extlen--;
- } else
- bh = NULL;
-
+ }
+ error = gfs2_metatype_check(sdp, bh, GFS2_METATYPE_JD);
+ if (error) {
+ brelse(bh);
+ goto fail;
+ }
+ dblock++;
+ extlen--;
memcpy(buf, bh->b_data + o, amount);
brelse(bh);
- if (error)
- goto fail;
-
+ buf += amount;
copied += amount;
lblock++;
-
o = sizeof(struct gfs2_meta_header);
}
return (copied) ? copied : error;
}
-typedef int (*gfs2_dscan_t)(const struct gfs2_dirent *dent,
- const struct qstr *name,
- void *opaque);
+static inline int gfs2_dirent_sentinel(const struct gfs2_dirent *dent)
+{
+ return dent->de_inum.no_addr == 0 || dent->de_inum.no_formal_ino == 0;
+}
static inline int __gfs2_dirent_find(const struct gfs2_dirent *dent,
const struct qstr *name, int ret)
{
- if (dent->de_inum.no_addr != 0 &&
+ if (!gfs2_dirent_sentinel(dent) &&
be32_to_cpu(dent->de_hash) == name->hash &&
be16_to_cpu(dent->de_name_len) == name->len &&
- memcmp((char *)(dent+1), name->name, name->len) == 0)
+ memcmp(dent+1, name->name, name->len) == 0)
return ret;
return 0;
}
unsigned actual = GFS2_DIRENT_SIZE(be16_to_cpu(dent->de_name_len));
unsigned totlen = be16_to_cpu(dent->de_rec_len);
- if (!dent->de_inum.no_addr)
+ if (gfs2_dirent_sentinel(dent))
actual = GFS2_DIRENT_SIZE(0);
- if ((totlen - actual) >= required)
+ if (totlen - actual >= required)
return 1;
return 0;
}
void *opaque)
{
struct dirent_gather *g = opaque;
- if (dent->de_inum.no_addr) {
+ if (!gfs2_dirent_sentinel(dent)) {
g->pdent[g->offset++] = dent;
}
return 0;
if (unlikely(offset + size > len))
goto error;
msg = "zero inode number";
- if (unlikely(!first && !dent->de_inum.no_addr))
+ if (unlikely(!first && gfs2_dirent_sentinel(dent)))
goto error;
msg = "name length is greater than space in dirent";
- if (dent->de_inum.no_addr &&
+ if (!gfs2_dirent_sentinel(dent) &&
unlikely(sizeof(struct gfs2_dirent)+be16_to_cpu(dent->de_name_len) >
size))
goto error;
return -1;
}
-static struct gfs2_dirent *gfs2_dirent_scan(struct inode *inode,
- void *buf,
+static struct gfs2_dirent *gfs2_dirent_scan(struct inode *inode, void *buf,
unsigned int len, gfs2_dscan_t scan,
const struct qstr *name,
void *opaque)
offset = ret;
prev = NULL;
- dent = (struct gfs2_dirent *)(buf + offset);
+ dent = buf + offset;
size = be16_to_cpu(dent->de_rec_len);
if (gfs2_check_dirent(dent, offset, size, len, 1))
goto consist_inode;
if (offset == len)
break;
prev = dent;
- dent = (struct gfs2_dirent *)(buf + offset);
+ dent = buf + offset;
size = be16_to_cpu(dent->de_rec_len);
if (gfs2_check_dirent(dent, offset, size, len, 0))
goto consist_inode;
}
consist_inode:
- gfs2_consist_inode(inode->u.generic_ip);
+ gfs2_consist_inode(GFS2_I(inode));
return ERR_PTR(-EIO);
}
struct gfs2_meta_header *h = (struct gfs2_meta_header *)bh->b_data;
if (be32_to_cpu(h->mh_type) == GFS2_METATYPE_LF) {
- if (gfs2_meta_check(dip->i_sbd, bh))
+ if (gfs2_meta_check(GFS2_SB(&dip->i_inode), bh))
return -EIO;
*dent = (struct gfs2_dirent *)(bh->b_data +
sizeof(struct gfs2_leaf));
return IS_LEAF;
} else {
- if (gfs2_metatype_check(dip->i_sbd, bh, GFS2_METATYPE_DI))
+ if (gfs2_metatype_check(GFS2_SB(&dip->i_inode), bh, GFS2_METATYPE_DI))
return -EIO;
*dent = (struct gfs2_dirent *)(bh->b_data +
sizeof(struct gfs2_dinode));
}
}
+static int dirent_check_reclen(struct gfs2_inode *dip,
+ const struct gfs2_dirent *d, const void *end_p)
+{
+ const void *ptr = d;
+ u16 rec_len = be16_to_cpu(d->de_rec_len);
+
+ if (unlikely(rec_len < sizeof(struct gfs2_dirent)))
+ goto broken;
+ ptr += rec_len;
+ if (ptr < end_p)
+ return rec_len;
+ if (ptr == end_p)
+ return -ENOENT;
+broken:
+ gfs2_consist_inode(dip);
+ return -EIO;
+}
+
/**
* dirent_next - Next dirent
* @dip: the directory
static int dirent_next(struct gfs2_inode *dip, struct buffer_head *bh,
struct gfs2_dirent **dent)
{
- struct gfs2_dirent *tmp, *cur;
- char *bh_end;
- uint16_t cur_rec_len;
-
- cur = *dent;
- bh_end = bh->b_data + bh->b_size;
- cur_rec_len = be16_to_cpu(cur->de_rec_len);
-
- if ((char *)cur + cur_rec_len >= bh_end) {
- if ((char *)cur + cur_rec_len > bh_end) {
- gfs2_consist_inode(dip);
- return -EIO;
- }
- return -ENOENT;
- }
+ struct gfs2_dirent *cur = *dent, *tmp;
+ char *bh_end = bh->b_data + bh->b_size;
+ int ret;
- tmp = (struct gfs2_dirent *)((char *)cur + cur_rec_len);
-
- if ((char *)tmp + be16_to_cpu(tmp->de_rec_len) > bh_end) {
- gfs2_consist_inode(dip);
- return -EIO;
- }
+ ret = dirent_check_reclen(dip, cur, bh_end);
+ if (ret < 0)
+ return ret;
- if (cur_rec_len == 0) {
- gfs2_consist_inode(dip);
- return -EIO;
- }
+ tmp = (void *)cur + ret;
+ ret = dirent_check_reclen(dip, tmp, bh_end);
+ if (ret == -EIO)
+ return ret;
/* Only the first dent could ever have de_inum.no_addr == 0 */
- if (!tmp->de_inum.no_addr) {
+ if (gfs2_dirent_sentinel(tmp)) {
gfs2_consist_inode(dip);
return -EIO;
}
*dent = tmp;
-
return 0;
}
static void dirent_del(struct gfs2_inode *dip, struct buffer_head *bh,
struct gfs2_dirent *prev, struct gfs2_dirent *cur)
{
- uint16_t cur_rec_len, prev_rec_len;
+ u16 cur_rec_len, prev_rec_len;
- if (!cur->de_inum.no_addr) {
+ if (gfs2_dirent_sentinel(cur)) {
gfs2_consist_inode(dip);
return;
}
out the inode number and return. */
if (!prev) {
- cur->de_inum.no_addr = 0; /* No endianess worries */
+ cur->de_inum.no_addr = 0;
+ cur->de_inum.no_formal_ino = 0;
return;
}
* Takes a dent from which to grab space as an argument. Returns the
* newly created dent.
*/
-struct gfs2_dirent *gfs2_init_dirent(struct inode *inode,
- struct gfs2_dirent *dent,
- const struct qstr *name,
- struct buffer_head *bh)
+static struct gfs2_dirent *gfs2_init_dirent(struct inode *inode,
+ struct gfs2_dirent *dent,
+ const struct qstr *name,
+ struct buffer_head *bh)
{
- struct gfs2_inode *ip = inode->u.generic_ip;
+ struct gfs2_inode *ip = GFS2_I(inode);
struct gfs2_dirent *ndent;
unsigned offset = 0, totlen;
- if (dent->de_inum.no_addr)
+ if (!gfs2_dirent_sentinel(dent))
offset = GFS2_DIRENT_SIZE(be16_to_cpu(dent->de_name_len));
totlen = be16_to_cpu(dent->de_rec_len);
BUG_ON(offset + name->len > totlen);
const struct qstr *name)
{
struct gfs2_dirent *dent;
- dent = gfs2_dirent_scan(inode, bh->b_data, bh->b_size,
+ dent = gfs2_dirent_scan(inode, bh->b_data, bh->b_size,
gfs2_dirent_find_space, name, NULL);
if (!dent || IS_ERR(dent))
return dent;
return gfs2_init_dirent(inode, dent, name, bh);
}
-static int get_leaf(struct gfs2_inode *dip, uint64_t leaf_no,
+static int get_leaf(struct gfs2_inode *dip, u64 leaf_no,
struct buffer_head **bhp)
{
int error;
- error = gfs2_meta_read(dip->i_gl, leaf_no, DIO_START | DIO_WAIT, bhp);
- if (!error && gfs2_metatype_check(dip->i_sbd, *bhp, GFS2_METATYPE_LF))
+ error = gfs2_meta_read(dip->i_gl, leaf_no, DIO_WAIT, bhp);
+ if (!error && gfs2_metatype_check(GFS2_SB(&dip->i_inode), *bhp, GFS2_METATYPE_LF)) {
+ /* printk(KERN_INFO "block num=%llu\n", leaf_no); */
error = -EIO;
+ }
return error;
}
* Returns: 0 on success, error code otherwise
*/
-static int get_leaf_nr(struct gfs2_inode *dip, uint32_t index,
- uint64_t *leaf_out)
+static int get_leaf_nr(struct gfs2_inode *dip, u32 index,
+ u64 *leaf_out)
{
- uint64_t leaf_no;
+ __be64 leaf_no;
int error;
error = gfs2_dir_read_data(dip, (char *)&leaf_no,
- index * sizeof(uint64_t),
- sizeof(uint64_t));
- if (error != sizeof(uint64_t))
+ index * sizeof(__be64),
+ sizeof(__be64), 0);
+ if (error != sizeof(u64))
return (error < 0) ? error : -EIO;
*leaf_out = be64_to_cpu(leaf_no);
return 0;
}
-static int get_first_leaf(struct gfs2_inode *dip, uint32_t index,
+static int get_first_leaf(struct gfs2_inode *dip, u32 index,
struct buffer_head **bh_out)
{
- uint64_t leaf_no;
+ u64 leaf_no;
int error;
error = get_leaf_nr(dip, index, &leaf_no);
{
struct buffer_head *bh;
struct gfs2_dirent *dent;
- struct gfs2_inode *ip = inode->u.generic_ip;
+ struct gfs2_inode *ip = GFS2_I(inode);
int error;
if (ip->i_di.di_flags & GFS2_DIF_EXHASH) {
goto got_dent;
leaf = (struct gfs2_leaf *)bh->b_data;
ln = be64_to_cpu(leaf->lf_next);
+ brelse(bh);
if (!ln)
break;
- brelse(bh);
+
error = get_leaf(ip, ln, &bh);
} while(!error);
return error ? ERR_PTR(error) : NULL;
}
+
error = gfs2_meta_inode_buffer(ip, &bh);
if (error)
return ERR_PTR(error);
dent = gfs2_dirent_scan(inode, bh->b_data, bh->b_size, scan, name, NULL);
got_dent:
- if (unlikely(IS_ERR(dent))) {
+ if (unlikely(dent == NULL || IS_ERR(dent))) {
brelse(bh);
bh = NULL;
}
static struct gfs2_leaf *new_leaf(struct inode *inode, struct buffer_head **pbh, u16 depth)
{
- struct gfs2_inode *ip = inode->u.generic_ip;
+ struct gfs2_inode *ip = GFS2_I(inode);
u64 bn = gfs2_alloc_meta(ip);
struct buffer_head *bh = gfs2_meta_new(ip->i_gl, bn);
struct gfs2_leaf *leaf;
struct qstr name = { .name = "", .len = 0, .hash = 0 };
if (!bh)
return NULL;
+
gfs2_trans_add_bh(ip->i_gl, bh, 1);
gfs2_metatype_set(bh, GFS2_METATYPE_LF, GFS2_FORMAT_LF);
leaf = (struct gfs2_leaf *)bh->b_data;
leaf->lf_depth = cpu_to_be16(depth);
- leaf->lf_entries = cpu_to_be16(0);
- leaf->lf_dirent_format = cpu_to_be16(GFS2_FORMAT_DE);
- leaf->lf_next = cpu_to_be64(0);
+ leaf->lf_entries = 0;
+ leaf->lf_dirent_format = cpu_to_be32(GFS2_FORMAT_DE);
+ leaf->lf_next = 0;
memset(leaf->lf_reserved, 0, sizeof(leaf->lf_reserved));
dent = (struct gfs2_dirent *)(leaf+1);
gfs2_qstr2dirent(&name, bh->b_size - sizeof(struct gfs2_leaf), dent);
static int dir_make_exhash(struct inode *inode)
{
- struct gfs2_inode *dip = inode->u.generic_ip;
- struct gfs2_sbd *sdp = dip->i_sbd;
+ struct gfs2_inode *dip = GFS2_I(inode);
+ struct gfs2_sbd *sdp = GFS2_SB(inode);
struct gfs2_dirent *dent;
struct qstr args;
struct buffer_head *bh, *dibh;
struct gfs2_leaf *leaf;
int y;
- uint32_t x;
- uint64_t *lp, bn;
+ u32 x;
+ __be64 *lp;
+ u64 bn;
int error;
error = gfs2_meta_inode_buffer(dip, &dibh);
args.len = bh->b_size - sizeof(struct gfs2_dinode) +
sizeof(struct gfs2_leaf);
args.name = bh->b_data;
- dent = gfs2_dirent_scan(dip->i_vnode, bh->b_data, bh->b_size,
+ dent = gfs2_dirent_scan(&dip->i_inode, bh->b_data, bh->b_size,
gfs2_dirent_last, &args, NULL);
if (!dent) {
brelse(bh);
gfs2_trans_add_bh(dip->i_gl, dibh, 1);
gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode));
- lp = (uint64_t *)(dibh->b_data + sizeof(struct gfs2_dinode));
+ lp = (__be64 *)(dibh->b_data + sizeof(struct gfs2_dinode));
for (x = sdp->sd_hash_ptrs; x--; lp++)
*lp = cpu_to_be64(bn);
dip->i_di.di_size = sdp->sd_sb.sb_bsize / 2;
dip->i_di.di_blocks++;
+ gfs2_set_inode_blocks(&dip->i_inode);
dip->i_di.di_flags |= GFS2_DIF_EXHASH;
- dip->i_di.di_payload_format = 0;
for (x = sdp->sd_hash_ptrs, y = -1; x; x >>= 1, y++) ;
dip->i_di.di_depth = y;
- gfs2_dinode_out(&dip->i_di, dibh->b_data);
+ gfs2_dinode_out(dip, dibh->b_data);
brelse(dibh);
static int dir_split_leaf(struct inode *inode, const struct qstr *name)
{
- struct gfs2_inode *dip = inode->u.generic_ip;
+ struct gfs2_inode *dip = GFS2_I(inode);
struct buffer_head *nbh, *obh, *dibh;
struct gfs2_leaf *nleaf, *oleaf;
- struct gfs2_dirent *dent, *prev = NULL, *next = NULL, *new;
- uint32_t start, len, half_len, divider;
- uint64_t bn, *lp, leaf_no;
- uint32_t index;
+ struct gfs2_dirent *dent = NULL, *prev = NULL, *next = NULL, *new;
+ u32 start, len, half_len, divider;
+ u64 bn, leaf_no;
+ __be64 *lp;
+ u32 index;
int x, moved = 0;
int error;
/* Change the pointers.
Don't bother distinguishing stuffed from non-stuffed.
This code is complicated enough already. */
- lp = kmalloc(half_len * sizeof(uint64_t), GFP_NOFS | __GFP_NOFAIL);
+ lp = kmalloc(half_len * sizeof(__be64), GFP_NOFS | __GFP_NOFAIL);
/* Change the pointers */
for (x = 0; x < half_len; x++)
lp[x] = cpu_to_be64(bn);
- error = gfs2_dir_write_data(dip, (char *)lp, start * sizeof(uint64_t),
- half_len * sizeof(uint64_t));
- if (error != half_len * sizeof(uint64_t)) {
+ error = gfs2_dir_write_data(dip, (char *)lp, start * sizeof(u64),
+ half_len * sizeof(u64));
+ if (error != half_len * sizeof(u64)) {
if (error >= 0)
error = -EIO;
goto fail_lpfree;
if (dirent_next(dip, obh, &next))
next = NULL;
- if (dent->de_inum.no_addr &&
+ if (!gfs2_dirent_sentinel(dent) &&
be32_to_cpu(dent->de_hash) < divider) {
struct qstr str;
str.name = (char*)(dent+1);
oleaf->lf_depth = nleaf->lf_depth;
error = gfs2_meta_inode_buffer(dip, &dibh);
- if (!gfs2_assert_withdraw(dip->i_sbd, !error)) {
+ if (!gfs2_assert_withdraw(GFS2_SB(&dip->i_inode), !error)) {
dip->i_di.di_blocks++;
- gfs2_dinode_out(&dip->i_di, dibh->b_data);
+ gfs2_set_inode_blocks(&dip->i_inode);
+ gfs2_dinode_out(dip, dibh->b_data);
brelse(dibh);
}
static int dir_double_exhash(struct gfs2_inode *dip)
{
- struct gfs2_sbd *sdp = dip->i_sbd;
+ struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
struct buffer_head *dibh;
- uint32_t hsize;
- uint64_t *buf;
- uint64_t *from, *to;
- uint64_t block;
+ u32 hsize;
+ u64 *buf;
+ u64 *from, *to;
+ u64 block;
int x;
int error = 0;
hsize = 1 << dip->i_di.di_depth;
- if (hsize * sizeof(uint64_t) != dip->i_di.di_size) {
+ if (hsize * sizeof(u64) != dip->i_di.di_size) {
gfs2_consist_inode(dip);
return -EIO;
}
for (block = dip->i_di.di_size >> sdp->sd_hash_bsize_shift; block--;) {
error = gfs2_dir_read_data(dip, (char *)buf,
block * sdp->sd_hash_bsize,
- sdp->sd_hash_bsize);
+ sdp->sd_hash_bsize, 1);
if (error != sdp->sd_hash_bsize) {
if (error >= 0)
error = -EIO;
}
from = buf;
- to = (uint64_t *)((char *)buf + sdp->sd_hash_bsize);
+ to = (u64 *)((char *)buf + sdp->sd_hash_bsize);
for (x = sdp->sd_hash_ptrs; x--; from++) {
*to++ = *from; /* No endianess worries */
error = gfs2_meta_inode_buffer(dip, &dibh);
if (!gfs2_assert_withdraw(sdp, !error)) {
dip->i_di.di_depth++;
- gfs2_dinode_out(&dip->i_di, dibh->b_data);
+ gfs2_dinode_out(dip, dibh->b_data);
brelse(dibh);
}
return error;
- fail:
+fail:
kfree(buf);
-
return error;
}
static int compare_dents(const void *a, const void *b)
{
- struct gfs2_dirent *dent_a, *dent_b;
- uint32_t hash_a, hash_b;
+ const struct gfs2_dirent *dent_a, *dent_b;
+ u32 hash_a, hash_b;
int ret = 0;
- dent_a = *(struct gfs2_dirent **)a;
+ dent_a = *(const struct gfs2_dirent **)a;
hash_a = be32_to_cpu(dent_a->de_hash);
- dent_b = *(struct gfs2_dirent **)b;
+ dent_b = *(const struct gfs2_dirent **)b;
hash_b = be32_to_cpu(dent_b->de_hash);
if (hash_a > hash_b)
else if (len_a < len_b)
ret = -1;
else
- ret = memcmp((char *)(dent_a + 1),
- (char *)(dent_b + 1),
- len_a);
+ ret = memcmp(dent_a + 1, dent_b + 1, len_a);
}
return ret;
* Returns: errno, >0 on exception from filldir
*/
-static int do_filldir_main(struct gfs2_inode *dip, uint64_t *offset,
- void *opaque, gfs2_filldir_t filldir,
- const struct gfs2_dirent **darr, uint32_t entries,
+static int do_filldir_main(struct gfs2_inode *dip, u64 *offset,
+ void *opaque, filldir_t filldir,
+ const struct gfs2_dirent **darr, u32 entries,
int *copied)
{
const struct gfs2_dirent *dent, *dent_next;
- struct gfs2_inum inum;
- uint64_t off, off_next;
+ u64 off, off_next;
unsigned int x, y;
int run = 0;
int error = 0;
*offset = off;
}
- gfs2_inum_in(&inum, (char *)&dent->de_inum);
-
- error = filldir(opaque, (char *)(dent + 1),
+ error = filldir(opaque, (const char *)(dent + 1),
be16_to_cpu(dent->de_name_len),
- off, &inum,
+ off, be64_to_cpu(dent->de_inum.no_addr),
be16_to_cpu(dent->de_type));
if (error)
return 1;
}
static int gfs2_dir_read_leaf(struct inode *inode, u64 *offset, void *opaque,
- gfs2_filldir_t filldir, int *copied,
- unsigned *depth, u64 leaf_no)
+ filldir_t filldir, int *copied, unsigned *depth,
+ u64 leaf_no)
{
- struct gfs2_inode *ip = inode->u.generic_ip;
+ struct gfs2_inode *ip = GFS2_I(inode);
struct buffer_head *bh;
struct gfs2_leaf *lf;
unsigned entries = 0;
return 0;
error = -ENOMEM;
- larr = kmalloc((leaves + entries) * sizeof(void*), GFP_KERNEL);
+ larr = vmalloc((leaves + entries) * sizeof(void *));
if (!larr)
goto out;
darr = (const struct gfs2_dirent **)(larr + leaves);
out_kfree:
for(i = 0; i < leaf; i++)
brelse(larr[i]);
- kfree(larr);
+ vfree(larr);
out:
return error;
}
* Returns: errno
*/
-static int dir_e_read(struct inode *inode, uint64_t *offset, void *opaque,
- gfs2_filldir_t filldir)
+static int dir_e_read(struct inode *inode, u64 *offset, void *opaque,
+ filldir_t filldir)
{
- struct gfs2_inode *dip = inode->u.generic_ip;
- struct gfs2_sbd *sdp = dip->i_sbd;
- uint32_t hsize, len = 0;
- uint32_t ht_offset, lp_offset, ht_offset_cur = -1;
- uint32_t hash, index;
- uint64_t *lp;
+ struct gfs2_inode *dip = GFS2_I(inode);
+ struct gfs2_sbd *sdp = GFS2_SB(inode);
+ u32 hsize, len = 0;
+ u32 ht_offset, lp_offset, ht_offset_cur = -1;
+ u32 hash, index;
+ __be64 *lp;
int copied = 0;
int error = 0;
- unsigned depth;
+ unsigned depth = 0;
hsize = 1 << dip->i_di.di_depth;
- if (hsize * sizeof(uint64_t) != dip->i_di.di_size) {
+ if (hsize * sizeof(u64) != dip->i_di.di_size) {
gfs2_consist_inode(dip);
return -EIO;
}
if (ht_offset_cur != ht_offset) {
error = gfs2_dir_read_data(dip, (char *)lp,
- ht_offset * sizeof(uint64_t),
- sdp->sd_hash_bsize);
+ ht_offset * sizeof(__be64),
+ sdp->sd_hash_bsize, 1);
if (error != sdp->sd_hash_bsize) {
if (error >= 0)
error = -EIO;
return error;
}
-int gfs2_dir_read(struct inode *inode, uint64_t *offset, void *opaque,
- gfs2_filldir_t filldir)
+int gfs2_dir_read(struct inode *inode, u64 *offset, void *opaque,
+ filldir_t filldir)
{
- struct gfs2_inode *dip = inode->u.generic_ip;
+ struct gfs2_inode *dip = GFS2_I(inode);
struct dirent_gather g;
const struct gfs2_dirent **darr, *dent;
struct buffer_head *dibh;
*/
int gfs2_dir_search(struct inode *dir, const struct qstr *name,
- struct gfs2_inum *inum, unsigned int *type)
+ struct gfs2_inum_host *inum, unsigned int *type)
{
struct buffer_head *bh;
struct gfs2_dirent *dent;
brelse(bh);
return 0;
}
- brelse(bh);
return -ENOENT;
}
static int dir_new_leaf(struct inode *inode, const struct qstr *name)
{
struct buffer_head *bh, *obh;
- struct gfs2_inode *ip = inode->u.generic_ip;
+ struct gfs2_inode *ip = GFS2_I(inode);
struct gfs2_leaf *leaf, *oleaf;
int error;
u32 index;
brelse(obh);
return -ENOSPC;
}
- oleaf->lf_next = cpu_to_be64(bn);
+ oleaf->lf_next = cpu_to_be64(bh->b_blocknr);
brelse(bh);
brelse(obh);
return error;
gfs2_trans_add_bh(ip->i_gl, bh, 1);
ip->i_di.di_blocks++;
- gfs2_dinode_out(&ip->i_di, bh->b_data);
+ gfs2_set_inode_blocks(&ip->i_inode);
+ gfs2_dinode_out(ip, bh->b_data);
brelse(bh);
return 0;
}
*/
int gfs2_dir_add(struct inode *inode, const struct qstr *name,
- const struct gfs2_inum *inum, unsigned type)
+ const struct gfs2_inum_host *inum, unsigned type)
{
- struct gfs2_inode *ip = inode->u.generic_ip;
+ struct gfs2_inode *ip = GFS2_I(inode);
struct buffer_head *bh;
struct gfs2_dirent *dent;
struct gfs2_leaf *leaf;
break;
gfs2_trans_add_bh(ip->i_gl, bh, 1);
ip->i_di.di_entries++;
- ip->i_di.di_mtime = ip->i_di.di_ctime = get_seconds();
- gfs2_dinode_out(&ip->i_di, bh->b_data);
+ ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME_SEC;
+ gfs2_dinode_out(ip, bh->b_data);
brelse(bh);
error = 0;
break;
/* Returns _either_ the entry (if its first in block) or the
previous entry otherwise */
- dent = gfs2_dirent_search(dip->i_vnode, name, gfs2_dirent_prev, &bh);
+ dent = gfs2_dirent_search(&dip->i_inode, name, gfs2_dirent_prev, &bh);
if (!dent) {
- brelse(bh);
gfs2_consist_inode(dip);
return -EIO;
}
gfs2_consist_inode(dip);
gfs2_trans_add_bh(dip->i_gl, bh, 1);
dip->i_di.di_entries--;
- dip->i_di.di_mtime = dip->i_di.di_ctime = get_seconds();
- gfs2_dinode_out(&dip->i_di, bh->b_data);
+ dip->i_inode.i_mtime = dip->i_inode.i_ctime = CURRENT_TIME_SEC;
+ gfs2_dinode_out(dip, bh->b_data);
brelse(bh);
+ mark_inode_dirty(&dip->i_inode);
return error;
}
*/
int gfs2_dir_mvino(struct gfs2_inode *dip, const struct qstr *filename,
- struct gfs2_inum *inum, unsigned int new_type)
+ struct gfs2_inum_host *inum, unsigned int new_type)
{
struct buffer_head *bh;
struct gfs2_dirent *dent;
int error;
- dent = gfs2_dirent_search(dip->i_vnode, filename, gfs2_dirent_find, &bh);
+ dent = gfs2_dirent_search(&dip->i_inode, filename, gfs2_dirent_find, &bh);
if (!dent) {
- brelse(bh);
gfs2_consist_inode(dip);
return -EIO;
}
gfs2_trans_add_bh(dip->i_gl, bh, 1);
}
- dip->i_di.di_mtime = dip->i_di.di_ctime = get_seconds();
- gfs2_dinode_out(&dip->i_di, bh->b_data);
+ dip->i_inode.i_mtime = dip->i_inode.i_ctime = CURRENT_TIME_SEC;
+ gfs2_dinode_out(dip, bh->b_data);
brelse(bh);
return 0;
}
static int foreach_leaf(struct gfs2_inode *dip, leaf_call_t lc, void *data)
{
- struct gfs2_sbd *sdp = dip->i_sbd;
+ struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
struct buffer_head *bh;
struct gfs2_leaf *leaf;
- uint32_t hsize, len;
- uint32_t ht_offset, lp_offset, ht_offset_cur = -1;
- uint32_t index = 0;
- uint64_t *lp;
- uint64_t leaf_no;
+ u32 hsize, len;
+ u32 ht_offset, lp_offset, ht_offset_cur = -1;
+ u32 index = 0;
+ __be64 *lp;
+ u64 leaf_no;
int error = 0;
hsize = 1 << dip->i_di.di_depth;
- if (hsize * sizeof(uint64_t) != dip->i_di.di_size) {
+ if (hsize * sizeof(u64) != dip->i_di.di_size) {
gfs2_consist_inode(dip);
return -EIO;
}
if (ht_offset_cur != ht_offset) {
error = gfs2_dir_read_data(dip, (char *)lp,
- ht_offset * sizeof(uint64_t),
- sdp->sd_hash_bsize);
+ ht_offset * sizeof(__be64),
+ sdp->sd_hash_bsize, 1);
if (error != sdp->sd_hash_bsize) {
if (error >= 0)
error = -EIO;
if (error)
goto out;
leaf = (struct gfs2_leaf *)bh->b_data;
- brelse(bh);
-
len = 1 << (dip->i_di.di_depth - be16_to_cpu(leaf->lf_depth));
+ brelse(bh);
error = lc(dip, index, len, leaf_no, data);
if (error)
error = -EIO;
}
- out:
+out:
kfree(lp);
return error;
* Returns: errno
*/
-static int leaf_dealloc(struct gfs2_inode *dip, uint32_t index, uint32_t len,
- uint64_t leaf_no, void *data)
+static int leaf_dealloc(struct gfs2_inode *dip, u32 index, u32 len,
+ u64 leaf_no, void *data)
{
- struct gfs2_sbd *sdp = dip->i_sbd;
+ struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
struct gfs2_leaf *tmp_leaf;
struct gfs2_rgrp_list rlist;
struct buffer_head *bh, *dibh;
- uint64_t blk, nblk;
+ u64 blk, nblk;
unsigned int rg_blocks = 0, l_blocks = 0;
char *ht;
- unsigned int x, size = len * sizeof(uint64_t);
+ unsigned int x, size = len * sizeof(u64);
int error;
memset(&rlist, 0, sizeof(struct gfs2_rgrp_list));
if (!dip->i_di.di_blocks)
gfs2_consist_inode(dip);
dip->i_di.di_blocks--;
+ gfs2_set_inode_blocks(&dip->i_inode);
}
- error = gfs2_dir_write_data(dip, ht, index * sizeof(uint64_t), size);
+ error = gfs2_dir_write_data(dip, ht, index * sizeof(u64), size);
if (error != size) {
if (error >= 0)
error = -EIO;
goto out_end_trans;
gfs2_trans_add_bh(dip->i_gl, dibh, 1);
- gfs2_dinode_out(&dip->i_di, dibh->b_data);
+ gfs2_dinode_out(dip, dibh->b_data);
brelse(dibh);
- out_end_trans:
+out_end_trans:
gfs2_trans_end(sdp);
-
- out_rg_gunlock:
+out_rg_gunlock:
gfs2_glock_dq_m(rlist.rl_rgrps, rlist.rl_ghs);
-
- out_rlist:
+out_rlist:
gfs2_rlist_free(&rlist);
gfs2_glock_dq_uninit(&dip->i_alloc.al_ri_gh);
-
- out_qs:
+out_qs:
gfs2_quota_unhold(dip);
-
- out:
+out:
gfs2_alloc_put(dip);
kfree(ht);
-
return error;
}
int gfs2_dir_exhash_dealloc(struct gfs2_inode *dip)
{
- struct gfs2_sbd *sdp = dip->i_sbd;
+ struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
struct buffer_head *bh;
int error;
* Returns: 1 if alloc required, 0 if not, -ve on error
*/
-int gfs2_diradd_alloc_required(struct inode *inode,
- const struct qstr *name)
+int gfs2_diradd_alloc_required(struct inode *inode, const struct qstr *name)
{
struct gfs2_dirent *dent;
struct buffer_head *bh;
dent = gfs2_dirent_search(inode, name, gfs2_dirent_find_space, &bh);
if (!dent) {
- brelse(bh);
return 1;
}
if (IS_ERR(dent))
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff