/*
* 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
*/
/*
-* 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.
-*/
+ * 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>
#include <linux/slab.h>
#include <linux/spinlock.h>
-#include <linux/completion.h>
#include <linux/buffer_head.h>
#include <linux/sort.h>
-#include <asm/semaphore.h>
+#include <linux/gfs2_ondisk.h>
+#include <linux/crc32.h>
+#include <linux/vmalloc.h>
#include "gfs2.h"
+#include "lm_interface.h"
+#include "incore.h"
#include "dir.h"
#include "glock.h"
#include "inode.h"
#include "rgrp.h"
#include "trans.h"
#include "bmap.h"
+#include "util.h"
#define IS_LEAF 1 /* Hashed (leaf) directory */
#define IS_DINODE 2 /* Linear (stuffed dinode block) directory */
uint32_t index, uint32_t len, uint64_t leaf_no,
void *data);
-static 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, uint64_t 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, uint64_t block,
+ struct buffer_head **bhp)
+{
+ struct buffer_head *bh;
+ int error;
+ 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;
+ }
+ *bhp = bh;
+ return 0;
+}
static int gfs2_dir_write_stuffed(struct gfs2_inode *ip, const char *buf,
unsigned int offset, unsigned int size)
return error;
gfs2_trans_add_bh(ip->i_gl, dibh, 1);
- memcpy(dibh->b_data + offset + sizeof(struct gfs2_inode), buf, size);
+ 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();
if (gfs2_is_stuffed(ip) &&
offset + size <= sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode))
- return gfs2_dir_write_stuffed(ip, buf, (unsigned int)offset, size);
+ return gfs2_dir_write_stuffed(ip, buf, (unsigned int)offset,
+ size);
if (gfs2_assert_warn(sdp, gfs2_is_jdata(ip)))
return -EINVAL;
if (gfs2_is_stuffed(ip)) {
error = gfs2_unstuff_dinode(ip, NULL, NULL);
if (error)
- return error;
+ return error;
}
lblock = offset;
if (!extlen) {
new = 1;
- error = gfs2_block_map(ip, lblock, &new, &dblock, &extlen);
+ error = gfs2_extent_map(ip->i_vnode, 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;
}
static int gfs2_dir_read_stuffed(struct gfs2_inode *ip, char *buf,
- unsigned int offset, unsigned int size)
+ unsigned int offset, unsigned int size)
{
struct buffer_head *dibh;
int error;
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, (unsigned int)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);
+ error = gfs2_extent_map(ip->i_vnode, lblock, &new,
+ &dblock, &extlen);
if (error)
goto fail;
}
gfs2_meta_ra(ip->i_gl, dblock, extlen);
if (dblock) {
- error = gfs2_dir_get_buffer(ip, dblock, new, &bh);
+ if (new)
+ error = gfs2_dir_get_new_buffer(ip, dblock, &bh);
+ else
+ error = gfs2_dir_get_existing_buffer(ip, dblock, &bh);
if (error)
goto fail;
dblock++;
return (copied) ? copied : error;
}
-/**
- * int gfs2_filecmp - Compare two filenames
- * @file1: The first filename
- * @file2: The second filename
- * @len_of_file2: The length of the second file
- *
- * This routine compares two filenames and returns 1 if they are equal.
- *
- * Returns: 1 if the files are the same, otherwise 0.
+typedef int (*gfs2_dscan_t)(const struct gfs2_dirent *dent,
+ const struct qstr *name,
+ void *opaque);
+
+static inline int __gfs2_dirent_find(const struct gfs2_dirent *dent,
+ const struct qstr *name, int ret)
+{
+ if (dent->de_inum.no_addr != 0 &&
+ 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)
+ return ret;
+ return 0;
+}
+
+static int gfs2_dirent_find(const struct gfs2_dirent *dent,
+ const struct qstr *name,
+ void *opaque)
+{
+ return __gfs2_dirent_find(dent, name, 1);
+}
+
+static int gfs2_dirent_prev(const struct gfs2_dirent *dent,
+ const struct qstr *name,
+ void *opaque)
+{
+ return __gfs2_dirent_find(dent, name, 2);
+}
+
+/*
+ * name->name holds ptr to start of block.
+ * name->len holds size of block.
*/
+static int gfs2_dirent_last(const struct gfs2_dirent *dent,
+ const struct qstr *name,
+ void *opaque)
+{
+ const char *start = name->name;
+ const char *end = (const char *)dent + be16_to_cpu(dent->de_rec_len);
+ if (name->len == (end - start))
+ return 1;
+ return 0;
+}
-int gfs2_filecmp(struct qstr *file1, char *file2, int len_of_file2)
+static int gfs2_dirent_find_space(const struct gfs2_dirent *dent,
+ const struct qstr *name,
+ void *opaque)
{
- if (file1->len != len_of_file2)
- return 0;
- if (memcmp(file1->name, file2, file1->len))
- return 0;
- return 1;
+ unsigned required = GFS2_DIRENT_SIZE(name->len);
+ 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)
+ actual = GFS2_DIRENT_SIZE(0);
+ if ((totlen - actual) >= required)
+ return 1;
+ return 0;
+}
+
+struct dirent_gather {
+ const struct gfs2_dirent **pdent;
+ unsigned offset;
+};
+
+static int gfs2_dirent_gather(const struct gfs2_dirent *dent,
+ const struct qstr *name,
+ void *opaque)
+{
+ struct dirent_gather *g = opaque;
+ if (dent->de_inum.no_addr) {
+ g->pdent[g->offset++] = dent;
+ }
+ return 0;
+}
+
+/*
+ * Other possible things to check:
+ * - Inode located within filesystem size (and on valid block)
+ * - Valid directory entry type
+ * Not sure how heavy-weight we want to make this... could also check
+ * hash is correct for example, but that would take a lot of extra time.
+ * For now the most important thing is to check that the various sizes
+ * are correct.
+ */
+static int gfs2_check_dirent(struct gfs2_dirent *dent, unsigned int offset,
+ unsigned int size, unsigned int len, int first)
+{
+ const char *msg = "gfs2_dirent too small";
+ if (unlikely(size < sizeof(struct gfs2_dirent)))
+ goto error;
+ msg = "gfs2_dirent misaligned";
+ if (unlikely(offset & 0x7))
+ goto error;
+ msg = "gfs2_dirent points beyond end of block";
+ if (unlikely(offset + size > len))
+ goto error;
+ msg = "zero inode number";
+ if (unlikely(!first && !dent->de_inum.no_addr))
+ goto error;
+ msg = "name length is greater than space in dirent";
+ if (dent->de_inum.no_addr &&
+ unlikely(sizeof(struct gfs2_dirent)+be16_to_cpu(dent->de_name_len) >
+ size))
+ goto error;
+ return 0;
+error:
+ printk(KERN_WARNING "gfs2_check_dirent: %s (%s)\n", msg,
+ first ? "first in block" : "not first in block");
+ return -EIO;
+}
+
+static int gfs2_dirent_offset(const void *buf)
+{
+ const struct gfs2_meta_header *h = buf;
+ int offset;
+
+ BUG_ON(buf == NULL);
+
+ switch(be32_to_cpu(h->mh_type)) {
+ case GFS2_METATYPE_LF:
+ offset = sizeof(struct gfs2_leaf);
+ break;
+ case GFS2_METATYPE_DI:
+ offset = sizeof(struct gfs2_dinode);
+ break;
+ default:
+ goto wrong_type;
+ }
+ return offset;
+wrong_type:
+ printk(KERN_WARNING "gfs2_scan_dirent: wrong block type %u\n",
+ be32_to_cpu(h->mh_type));
+ return -1;
}
+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)
+{
+ struct gfs2_dirent *dent, *prev;
+ unsigned offset;
+ unsigned size;
+ int ret = 0;
+
+ ret = gfs2_dirent_offset(buf);
+ if (ret < 0)
+ goto consist_inode;
+
+ offset = ret;
+ prev = NULL;
+ dent = (struct gfs2_dirent *)(buf + offset);
+ size = be16_to_cpu(dent->de_rec_len);
+ if (gfs2_check_dirent(dent, offset, size, len, 1))
+ goto consist_inode;
+ do {
+ ret = scan(dent, name, opaque);
+ if (ret)
+ break;
+ offset += size;
+ if (offset == len)
+ break;
+ prev = dent;
+ dent = (struct gfs2_dirent *)(buf + offset);
+ size = be16_to_cpu(dent->de_rec_len);
+ if (gfs2_check_dirent(dent, offset, size, len, 0))
+ goto consist_inode;
+ } while(1);
+
+ switch(ret) {
+ case 0:
+ return NULL;
+ case 1:
+ return dent;
+ case 2:
+ return prev ? prev : dent;
+ default:
+ BUG_ON(ret > 0);
+ return ERR_PTR(ret);
+ }
+
+consist_inode:
+ gfs2_consist_inode(inode->u.generic_ip);
+ return ERR_PTR(-EIO);
+}
+
+
/**
* dirent_first - Return the first dirent
* @dip: the directory
{
struct gfs2_meta_header *h = (struct gfs2_meta_header *)bh->b_data;
- if (be16_to_cpu(h->mh_type) == GFS2_METATYPE_LF) {
+ if (be32_to_cpu(h->mh_type) == GFS2_METATYPE_LF) {
if (gfs2_meta_check(dip->i_sbd, bh))
return -EIO;
*dent = (struct gfs2_dirent *)(bh->b_data +
{
struct gfs2_dirent *tmp, *cur;
char *bh_end;
- uint32_t cur_rec_len;
+ uint16_t cur_rec_len;
cur = *dent;
bh_end = bh->b_data + bh->b_size;
- cur_rec_len = be32_to_cpu(cur->de_rec_len);
+ 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) {
tmp = (struct gfs2_dirent *)((char *)cur + cur_rec_len);
- if ((char *)tmp + be32_to_cpu(tmp->de_rec_len) > bh_end) {
+ if ((char *)tmp + be16_to_cpu(tmp->de_rec_len) > bh_end) {
+ gfs2_consist_inode(dip);
+ return -EIO;
+ }
+
+ if (cur_rec_len == 0) {
gfs2_consist_inode(dip);
return -EIO;
}
+
/* Only the first dent could ever have de_inum.no_addr == 0 */
if (!tmp->de_inum.no_addr) {
gfs2_consist_inode(dip);
static void dirent_del(struct gfs2_inode *dip, struct buffer_head *bh,
struct gfs2_dirent *prev, struct gfs2_dirent *cur)
{
- uint32_t cur_rec_len, prev_rec_len;
+ uint16_t cur_rec_len, prev_rec_len;
if (!cur->de_inum.no_addr) {
gfs2_consist_inode(dip);
/* Combine this dentry with the previous one. */
- prev_rec_len = be32_to_cpu(prev->de_rec_len);
- cur_rec_len = be32_to_cpu(cur->de_rec_len);
+ prev_rec_len = be16_to_cpu(prev->de_rec_len);
+ cur_rec_len = be16_to_cpu(cur->de_rec_len);
if ((char *)prev + prev_rec_len != (char *)cur)
gfs2_consist_inode(dip);
gfs2_consist_inode(dip);
prev_rec_len += cur_rec_len;
- prev->de_rec_len = cpu_to_be32(prev_rec_len);
+ prev->de_rec_len = cpu_to_be16(prev_rec_len);
}
-/**
- * gfs2_dirent_alloc - Allocate a directory entry
- * @dip: The GFS2 inode
- * @bh: The buffer
- * @name_len: The length of the name
- * @dent_out: Pointer to list of dirents
- *
- * Returns: 0 on success, error code otherwise
+/*
+ * Takes a dent from which to grab space as an argument. Returns the
+ * newly created dent.
*/
-
-int gfs2_dirent_alloc(struct gfs2_inode *dip, struct buffer_head *bh,
- int name_len, struct gfs2_dirent **dent_out)
+static struct gfs2_dirent *gfs2_init_dirent(struct inode *inode,
+ struct gfs2_dirent *dent,
+ const struct qstr *name,
+ struct buffer_head *bh)
{
- struct gfs2_dirent *dent, *new;
- unsigned int rec_len = GFS2_DIRENT_SIZE(name_len);
- unsigned int entries = 0, offset = 0;
- int type;
-
- type = dirent_first(dip, bh, &dent);
- if (type < 0)
- return type;
-
- if (type == IS_LEAF) {
- struct gfs2_leaf *leaf = (struct gfs2_leaf *)bh->b_data;
- entries = be16_to_cpu(leaf->lf_entries);
- offset = sizeof(struct gfs2_leaf);
- } else {
- struct gfs2_dinode *dinode = (struct gfs2_dinode *)bh->b_data;
- entries = be32_to_cpu(dinode->di_entries);
- offset = sizeof(struct gfs2_dinode);
- }
-
- if (!entries) {
- if (dent->de_inum.no_addr) {
- gfs2_consist_inode(dip);
- return -EIO;
- }
-
- gfs2_trans_add_bh(dip->i_gl, bh, 1);
-
- dent->de_rec_len = bh->b_size - offset;
- dent->de_rec_len = cpu_to_be32(dent->de_rec_len);
- dent->de_name_len = name_len;
-
- *dent_out = dent;
- return 0;
- }
-
- do {
- uint32_t cur_rec_len, cur_name_len;
-
- cur_rec_len = be32_to_cpu(dent->de_rec_len);
- cur_name_len = dent->de_name_len;
-
- if ((!dent->de_inum.no_addr && cur_rec_len >= rec_len) ||
- (cur_rec_len >= GFS2_DIRENT_SIZE(cur_name_len) + rec_len)) {
- gfs2_trans_add_bh(dip->i_gl, bh, 1);
-
- if (dent->de_inum.no_addr) {
- new = (struct gfs2_dirent *)((char *)dent +
- GFS2_DIRENT_SIZE(cur_name_len));
- memset(new, 0, sizeof(struct gfs2_dirent));
-
- new->de_rec_len = cur_rec_len - GFS2_DIRENT_SIZE(cur_name_len);
- new->de_rec_len = cpu_to_be32(new->de_rec_len);
- new->de_name_len = name_len;
-
- dent->de_rec_len = cur_rec_len - be32_to_cpu(new->de_rec_len);
- dent->de_rec_len = cpu_to_be32(dent->de_rec_len);
-
- *dent_out = new;
- return 0;
- }
-
- dent->de_name_len = name_len;
-
- *dent_out = dent;
- return 0;
- }
- } while (dirent_next(dip, bh, &dent) == 0);
-
- return -ENOSPC;
+ struct gfs2_inode *ip = inode->u.generic_ip;
+ struct gfs2_dirent *ndent;
+ unsigned offset = 0, totlen;
+
+ if (dent->de_inum.no_addr)
+ 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);
+ gfs2_trans_add_bh(ip->i_gl, bh, 1);
+ ndent = (struct gfs2_dirent *)((char *)dent + offset);
+ dent->de_rec_len = cpu_to_be16(offset);
+ gfs2_qstr2dirent(name, totlen - offset, ndent);
+ return ndent;
}
-/**
- * dirent_fits - See if we can fit a entry in this buffer
- * @dip: The GFS2 inode
- * @bh: The buffer
- * @name_len: The length of the name
- *
- * Returns: 1 if it can fit, 0 otherwise
- */
-
-static int dirent_fits(struct gfs2_inode *dip, struct buffer_head *bh,
- int name_len)
+static struct gfs2_dirent *gfs2_dirent_alloc(struct inode *inode,
+ struct buffer_head *bh,
+ const struct qstr *name)
{
struct gfs2_dirent *dent;
- unsigned int rec_len = GFS2_DIRENT_SIZE(name_len);
- unsigned int entries = 0;
- int type;
-
- type = dirent_first(dip, bh, &dent);
- if (type < 0)
- return type;
-
- if (type == IS_LEAF) {
- struct gfs2_leaf *leaf = (struct gfs2_leaf *)bh->b_data;
- entries = be16_to_cpu(leaf->lf_entries);
- } else {
- struct gfs2_dinode *dinode = (struct gfs2_dinode *)bh->b_data;
- entries = be32_to_cpu(dinode->di_entries);
- }
-
- if (!entries)
- return 1;
-
- do {
- uint32_t cur_rec_len, cur_name_len;
-
- cur_rec_len = be32_to_cpu(dent->de_rec_len);
- cur_name_len = dent->de_name_len;
-
- if ((!dent->de_inum.no_addr && cur_rec_len >= rec_len) ||
- (cur_rec_len >= GFS2_DIRENT_SIZE(cur_name_len) + rec_len))
- return 1;
- } while (dirent_next(dip, bh, &dent) == 0);
-
- return 0;
-}
-
-static int leaf_search(struct gfs2_inode *dip, struct buffer_head *bh,
- struct qstr *filename, struct gfs2_dirent **dent_out,
- struct gfs2_dirent **dent_prev)
-{
- uint32_t hash;
- struct gfs2_dirent *dent, *prev = NULL;
- unsigned int entries = 0;
- int type;
-
- type = dirent_first(dip, bh, &dent);
- if (type < 0)
- return type;
-
- if (type == IS_LEAF) {
- struct gfs2_leaf *leaf = (struct gfs2_leaf *)bh->b_data;
- entries = be16_to_cpu(leaf->lf_entries);
- } else if (type == IS_DINODE) {
- struct gfs2_dinode *dinode = (struct gfs2_dinode *)bh->b_data;
- entries = be32_to_cpu(dinode->di_entries);
- }
-
- hash = gfs2_disk_hash(filename->name, filename->len);
-
- do {
- if (!dent->de_inum.no_addr) {
- prev = dent;
- continue;
- }
-
- if (be32_to_cpu(dent->de_hash) == hash &&
- gfs2_filecmp(filename, (char *)(dent + 1),
- dent->de_name_len)) {
- *dent_out = dent;
- if (dent_prev)
- *dent_prev = prev;
-
- return 0;
- }
-
- prev = dent;
- } while (dirent_next(dip, bh, &dent) == 0);
-
- return -ENOENT;
+ 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,
return error;
}
-static int get_next_leaf(struct gfs2_inode *dip, struct buffer_head *bh_in,
- struct buffer_head **bh_out)
+static struct gfs2_dirent *gfs2_dirent_search(struct inode *inode,
+ const struct qstr *name,
+ gfs2_dscan_t scan,
+ struct buffer_head **pbh)
{
- struct gfs2_leaf *leaf;
+ struct buffer_head *bh;
+ struct gfs2_dirent *dent;
+ struct gfs2_inode *ip = inode->u.generic_ip;
int error;
- leaf = (struct gfs2_leaf *)bh_in->b_data;
-
- if (!leaf->lf_next)
- error = -ENOENT;
- else
- error = get_leaf(dip, be64_to_cpu(leaf->lf_next), bh_out);
-
- return error;
-}
+ if (ip->i_di.di_flags & GFS2_DIF_EXHASH) {
+ struct gfs2_leaf *leaf;
+ unsigned hsize = 1 << ip->i_di.di_depth;
+ unsigned index;
+ u64 ln;
+ if (hsize * sizeof(u64) != ip->i_di.di_size) {
+ gfs2_consist_inode(ip);
+ return ERR_PTR(-EIO);
+ }
-static int linked_leaf_search(struct gfs2_inode *dip, struct qstr *filename,
- struct gfs2_dirent **dent_out,
- struct gfs2_dirent **dent_prev,
- struct buffer_head **bh_out)
-{
- struct buffer_head *bh = NULL, *bh_next;
- uint32_t hsize, index;
- uint32_t hash;
- int error;
+ index = name->hash >> (32 - ip->i_di.di_depth);
+ error = get_first_leaf(ip, index, &bh);
+ if (error)
+ return ERR_PTR(error);
+ do {
+ dent = gfs2_dirent_scan(inode, bh->b_data, bh->b_size,
+ scan, name, NULL);
+ if (dent)
+ goto got_dent;
+ leaf = (struct gfs2_leaf *)bh->b_data;
+ ln = be64_to_cpu(leaf->lf_next);
+ brelse(bh);
+ if (!ln)
+ break;
+ error = get_leaf(ip, ln, &bh);
+ } while(!error);
- hsize = 1 << dip->i_di.di_depth;
- if (hsize * sizeof(uint64_t) != dip->i_di.di_size) {
- gfs2_consist_inode(dip);
- return -EIO;
+ return error ? ERR_PTR(error) : NULL;
}
- /* Figure out the address of the leaf node. */
-
- hash = gfs2_disk_hash(filename->name, filename->len);
- index = hash >> (32 - dip->i_di.di_depth);
-
- error = get_first_leaf(dip, index, &bh_next);
+ error = gfs2_meta_inode_buffer(ip, &bh);
if (error)
- return error;
-
- /* Find the entry */
-
- do {
+ return ERR_PTR(error);
+ dent = gfs2_dirent_scan(inode, bh->b_data, bh->b_size, scan, name, NULL);
+got_dent:
+ if (unlikely(dent == NULL || IS_ERR(dent))) {
brelse(bh);
-
- bh = bh_next;
-
- error = leaf_search(dip, bh, filename, dent_out, dent_prev);
- switch (error) {
- case 0:
- *bh_out = bh;
- return 0;
-
- case -ENOENT:
- break;
-
- default:
- brelse(bh);
- return error;
- }
-
- error = get_next_leaf(dip, bh, &bh_next);
+ bh = NULL;
}
- while (!error);
-
- brelse(bh);
+ *pbh = bh;
+ return dent;
+}
- return error;
+static struct gfs2_leaf *new_leaf(struct inode *inode, struct buffer_head **pbh, u16 depth)
+{
+ struct gfs2_inode *ip = inode->u.generic_ip;
+ u64 bn = gfs2_alloc_meta(ip);
+ struct buffer_head *bh = gfs2_meta_new(ip->i_gl, bn);
+ struct gfs2_leaf *leaf;
+ struct gfs2_dirent *dent;
+ 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);
+ 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);
+ *pbh = bh;
+ return leaf;
}
/**
* Returns: 0 on success, error code otherwise
*/
-static int dir_make_exhash(struct gfs2_inode *dip)
+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_dirent *dent;
+ struct qstr args;
struct buffer_head *bh, *dibh;
struct gfs2_leaf *leaf;
int y;
if (error)
return error;
- /* Allocate a new block for the first leaf node */
-
- bn = gfs2_alloc_meta(dip);
-
/* Turn over a new leaf */
- bh = gfs2_meta_new(dip->i_gl, bn);
- gfs2_trans_add_bh(dip->i_gl, bh, 1);
- gfs2_metatype_set(bh, GFS2_METATYPE_LF, GFS2_FORMAT_LF);
- gfs2_buffer_clear_tail(bh, sizeof(struct gfs2_meta_header));
-
- /* Fill in the leaf structure */
-
- leaf = (struct gfs2_leaf *)bh->b_data;
+ leaf = new_leaf(inode, &bh, 0);
+ if (!leaf)
+ return -ENOSPC;
+ bn = bh->b_blocknr;
gfs2_assert(sdp, dip->i_di.di_entries < (1 << 16));
-
- leaf->lf_dirent_format = cpu_to_be32(GFS2_FORMAT_DE);
leaf->lf_entries = cpu_to_be16(dip->i_di.di_entries);
/* Copy dirents */
/* Find last entry */
x = 0;
- dirent_first(dip, bh, &dent);
-
- do {
- if (!dent->de_inum.no_addr)
- continue;
- if (++x == dip->i_di.di_entries)
- break;
+ 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,
+ gfs2_dirent_last, &args, NULL);
+ if (!dent) {
+ brelse(bh);
+ brelse(dibh);
+ return -EIO;
+ }
+ if (IS_ERR(dent)) {
+ brelse(bh);
+ brelse(dibh);
+ return PTR_ERR(dent);
}
- while (dirent_next(dip, bh, &dent) == 0);
/* Adjust the last dirent's record length
(Remember that dent still points to the last entry.) */
- dent->de_rec_len = be32_to_cpu(dent->de_rec_len) +
+ dent->de_rec_len = cpu_to_be16(be16_to_cpu(dent->de_rec_len) +
sizeof(struct gfs2_dinode) -
- sizeof(struct gfs2_leaf);
- dent->de_rec_len = cpu_to_be32(dent->de_rec_len);
+ sizeof(struct gfs2_leaf));
brelse(bh);
* Returns: 0 on success, error code on failure
*/
-static int dir_split_leaf(struct gfs2_inode *dip, uint32_t index,
- uint64_t leaf_no)
+static int dir_split_leaf(struct inode *inode, const struct qstr *name)
{
+ struct gfs2_inode *dip = inode->u.generic_ip;
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;
- uint32_t name_len;
+ uint64_t bn, *lp, leaf_no;
+ uint32_t index;
int x, moved = 0;
int error;
- /* Allocate the new leaf block */
-
- bn = gfs2_alloc_meta(dip);
-
- /* Get the new leaf block */
-
- nbh = gfs2_meta_new(dip->i_gl, bn);
- gfs2_trans_add_bh(dip->i_gl, nbh, 1);
- gfs2_metatype_set(nbh, GFS2_METATYPE_LF, GFS2_FORMAT_LF);
- gfs2_buffer_clear_tail(nbh, sizeof(struct gfs2_meta_header));
-
- nleaf = (struct gfs2_leaf *)nbh->b_data;
-
- nleaf->lf_dirent_format = cpu_to_be32(GFS2_FORMAT_DE);
+ index = name->hash >> (32 - dip->i_di.di_depth);
+ error = get_leaf_nr(dip, index, &leaf_no);
+ if (error)
+ return error;
/* Get the old leaf block */
-
error = get_leaf(dip, leaf_no, &obh);
if (error)
- goto fail;
+ return error;
+
+ oleaf = (struct gfs2_leaf *)obh->b_data;
+ if (dip->i_di.di_depth == be16_to_cpu(oleaf->lf_depth)) {
+ brelse(obh);
+ return 1; /* can't split */
+ }
gfs2_trans_add_bh(dip->i_gl, obh, 1);
- oleaf = (struct gfs2_leaf *)obh->b_data;
+ nleaf = new_leaf(inode, &nbh, be16_to_cpu(oleaf->lf_depth) + 1);
+ if (!nleaf) {
+ brelse(obh);
+ return -ENOSPC;
+ }
+ bn = nbh->b_blocknr;
/* Compute the start and len of leaf pointers in the hash table. */
-
len = 1 << (dip->i_di.di_depth - be16_to_cpu(oleaf->lf_depth));
half_len = len >> 1;
if (!half_len) {
+ printk(KERN_WARNING "di_depth %u lf_depth %u index %u\n", dip->i_di.di_depth, be16_to_cpu(oleaf->lf_depth), index);
gfs2_consist_inode(dip);
error = -EIO;
goto fail_brelse;
/* Change the pointers.
Don't bother distinguishing stuffed from non-stuffed.
This code is complicated enough already. */
-
- lp = kcalloc(half_len, sizeof(uint64_t), GFP_KERNEL | __GFP_NOFAIL);
-
- error = gfs2_dir_read_data(dip, (char *)lp, start * sizeof(uint64_t),
- half_len * sizeof(uint64_t));
- if (error != half_len * sizeof(uint64_t)) {
- if (error >= 0)
- error = -EIO;
- goto fail_lpfree;
- }
-
+ lp = kmalloc(half_len * sizeof(uint64_t), 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));
+ half_len * sizeof(uint64_t));
if (error != half_len * sizeof(uint64_t)) {
if (error >= 0)
error = -EIO;
kfree(lp);
/* Compute the divider */
-
divider = (start + half_len) << (32 - dip->i_di.di_depth);
/* Copy the entries */
-
dirent_first(dip, obh, &dent);
do {
if (dent->de_inum.no_addr &&
be32_to_cpu(dent->de_hash) < divider) {
- name_len = dent->de_name_len;
-
- gfs2_dirent_alloc(dip, nbh, name_len, &new);
+ struct qstr str;
+ str.name = (char*)(dent+1);
+ str.len = be16_to_cpu(dent->de_name_len);
+ str.hash = be32_to_cpu(dent->de_hash);
+ new = gfs2_dirent_alloc(inode, nbh, &str);
+ if (IS_ERR(new)) {
+ error = PTR_ERR(new);
+ break;
+ }
new->de_inum = dent->de_inum; /* No endian worries */
- new->de_hash = dent->de_hash; /* No endian worries */
new->de_type = dent->de_type; /* No endian worries */
- memcpy((char *)(new + 1), (char *)(dent + 1),
- name_len);
-
- nleaf->lf_entries = be16_to_cpu(nleaf->lf_entries)+1;
- nleaf->lf_entries = cpu_to_be16(nleaf->lf_entries);
+ nleaf->lf_entries = cpu_to_be16(be16_to_cpu(nleaf->lf_entries)+1);
dirent_del(dip, obh, prev, dent);
if (!oleaf->lf_entries)
gfs2_consist_inode(dip);
- oleaf->lf_entries = be16_to_cpu(oleaf->lf_entries)-1;
- oleaf->lf_entries = cpu_to_be16(oleaf->lf_entries);
+ oleaf->lf_entries = cpu_to_be16(be16_to_cpu(oleaf->lf_entries)-1);
if (!prev)
prev = dent;
moved = 1;
- } else
+ } else {
prev = dent;
-
+ }
dent = next;
- }
- while (dent);
-
- /* If none of the entries got moved into the new leaf,
- artificially fill in the first entry. */
-
- if (!moved) {
- gfs2_dirent_alloc(dip, nbh, 0, &new);
- new->de_inum.no_addr = 0;
- }
+ } while (dent);
- oleaf->lf_depth = be16_to_cpu(oleaf->lf_depth) + 1;
- oleaf->lf_depth = cpu_to_be16(oleaf->lf_depth);
- nleaf->lf_depth = oleaf->lf_depth;
+ oleaf->lf_depth = nleaf->lf_depth;
error = gfs2_meta_inode_buffer(dip, &dibh);
if (!gfs2_assert_withdraw(dip->i_sbd, !error)) {
return error;
- fail_lpfree:
+fail_lpfree:
kfree(lp);
- fail_brelse:
+fail_brelse:
brelse(obh);
-
- fail:
brelse(nbh);
return error;
}
int ret = 0;
dent_a = *(struct gfs2_dirent **)a;
- hash_a = dent_a->de_hash;
- hash_a = be32_to_cpu(hash_a);
+ hash_a = be32_to_cpu(dent_a->de_hash);
dent_b = *(struct gfs2_dirent **)b;
- hash_b = dent_b->de_hash;
- hash_b = be32_to_cpu(hash_b);
+ hash_b = be32_to_cpu(dent_b->de_hash);
if (hash_a > hash_b)
ret = 1;
else if (hash_a < hash_b)
ret = -1;
else {
- unsigned int len_a = dent_a->de_name_len;
- unsigned int len_b = dent_b->de_name_len;
+ unsigned int len_a = be16_to_cpu(dent_a->de_name_len);
+ unsigned int len_b = be16_to_cpu(dent_b->de_name_len);
if (len_a > len_b)
ret = 1;
static int do_filldir_main(struct gfs2_inode *dip, uint64_t *offset,
void *opaque, gfs2_filldir_t filldir,
- struct gfs2_dirent **darr, uint32_t entries,
+ const struct gfs2_dirent **darr, uint32_t entries,
int *copied)
{
- struct gfs2_dirent *dent, *dent_next;
+ const struct gfs2_dirent *dent, *dent_next;
struct gfs2_inum inum;
uint64_t off, off_next;
unsigned int x, y;
gfs2_inum_in(&inum, (char *)&dent->de_inum);
error = filldir(opaque, (char *)(dent + 1),
- dent->de_name_len,
+ be16_to_cpu(dent->de_name_len),
off, &inum,
- dent->de_type);
+ be16_to_cpu(dent->de_type));
if (error)
return 1;
do_filldir fxn, we get the next entry instead of the last one in the
current leaf */
- (*offset)++;
-
- return 0;
-}
-
-/**
- * do_filldir_single - Read directory entries out of a single block
- * @dip: The GFS2 inode
- * @offset: The offset in the file to read from
- * @opaque: opaque data to pass to filldir
- * @filldir: The function to pass entries to
- * @bh: the block
- * @entries: the number of entries in the block
- * @copied: pointer to int that's non-zero if a entry has been copied out
- *
- * Returns: errno, >0 on exception from filldir
- */
-
-static int do_filldir_single(struct gfs2_inode *dip, uint64_t *offset,
- void *opaque, gfs2_filldir_t filldir,
- struct buffer_head *bh, uint32_t entries,
- int *copied)
-{
- struct gfs2_dirent **darr;
- struct gfs2_dirent *de;
- unsigned int e = 0;
- int error;
-
- if (!entries)
- return 0;
-
- darr = kcalloc(entries, sizeof(struct gfs2_dirent *), GFP_KERNEL);
- if (!darr)
- return -ENOMEM;
-
- dirent_first(dip, bh, &de);
- do {
- if (!de->de_inum.no_addr)
- continue;
- if (e >= entries) {
- gfs2_consist_inode(dip);
- error = -EIO;
- goto out;
- }
- darr[e++] = de;
- }
- while (dirent_next(dip, bh, &de) == 0);
-
- if (e != entries) {
- gfs2_consist_inode(dip);
- error = -EIO;
- goto out;
- }
-
- error = do_filldir_main(dip, offset, opaque, filldir, darr,
- entries, copied);
-
- out:
- kfree(darr);
-
- return error;
-}
-
-/**
- * do_filldir_multi - Read directory entries out of a linked leaf list
- * @dip: The GFS2 inode
- * @offset: The offset in the file to read from
- * @opaque: opaque data to pass to filldir
- * @filldir: The function to pass entries to
- * @bh: the first leaf in the list
- * @copied: pointer to int that's non-zero if a entry has been copied out
- *
- * Returns: errno, >0 on exception from filldir
- */
-
-static int do_filldir_multi(struct gfs2_inode *dip, uint64_t *offset,
- void *opaque, gfs2_filldir_t filldir,
- struct buffer_head *bh, int *copied)
-{
- struct buffer_head **larr = NULL;
- struct gfs2_dirent **darr;
- struct gfs2_leaf *leaf;
- struct buffer_head *tmp_bh;
- struct gfs2_dirent *de;
- unsigned int entries, e = 0;
- unsigned int leaves = 0, l = 0;
- unsigned int x;
- uint64_t ln;
- int error = 0;
-
- /* Count leaves and entries */
-
- leaf = (struct gfs2_leaf *)bh->b_data;
- entries = be16_to_cpu(leaf->lf_entries);
- ln = leaf->lf_next;
-
- while (ln) {
- ln = be64_to_cpu(ln);
-
- error = get_leaf(dip, ln, &tmp_bh);
- if (error)
- return error;
-
- leaf = (struct gfs2_leaf *)tmp_bh->b_data;
- if (leaf->lf_entries) {
- entries += be16_to_cpu(leaf->lf_entries);
- leaves++;
- }
- ln = leaf->lf_next;
-
- brelse(tmp_bh);
- }
-
- if (!entries)
- return 0;
-
- if (leaves) {
- larr = kcalloc(leaves, sizeof(struct buffer_head *),GFP_KERNEL);
- if (!larr)
- return -ENOMEM;
- }
-
- darr = kcalloc(entries, sizeof(struct gfs2_dirent *), GFP_KERNEL);
- if (!darr) {
- kfree(larr);
- return -ENOMEM;
- }
-
- leaf = (struct gfs2_leaf *)bh->b_data;
- if (leaf->lf_entries) {
- dirent_first(dip, bh, &de);
- do {
- if (!de->de_inum.no_addr)
- continue;
- if (e >= entries) {
- gfs2_consist_inode(dip);
- error = -EIO;
- goto out;
- }
- darr[e++] = de;
- }
- while (dirent_next(dip, bh, &de) == 0);
- }
- ln = leaf->lf_next;
-
- while (ln) {
- ln = be64_to_cpu(ln);
-
- error = get_leaf(dip, ln, &tmp_bh);
- if (error)
- goto out;
-
- leaf = (struct gfs2_leaf *)tmp_bh->b_data;
- if (leaf->lf_entries) {
- dirent_first(dip, tmp_bh, &de);
- do {
- if (!de->de_inum.no_addr)
- continue;
- if (e >= entries) {
- gfs2_consist_inode(dip);
- error = -EIO;
- goto out;
- }
- darr[e++] = de;
- }
- while (dirent_next(dip, tmp_bh, &de) == 0);
-
- larr[l++] = tmp_bh;
-
- ln = leaf->lf_next;
- } else {
- ln = leaf->lf_next;
- brelse(tmp_bh);
- }
- }
-
- if (gfs2_assert_withdraw(dip->i_sbd, l == leaves)) {
- error = -EIO;
- goto out;
- }
- if (e != entries) {
- gfs2_consist_inode(dip);
- error = -EIO;
- goto out;
- }
-
- error = do_filldir_main(dip, offset, opaque, filldir, darr,
- entries, copied);
-
- out:
- kfree(darr);
- for (x = 0; x < l; x++)
- brelse(larr[x]);
- kfree(larr);
-
- return error;
-}
-
-/**
- * dir_e_search - Search exhash (leaf) dir for inode matching name
- * @dip: The GFS2 inode
- * @filename: Filename string
- * @inode: If non-NULL, function fills with formal inode # and block address
- * @type: If non-NULL, function fills with DT_... dinode type
- *
- * Returns:
- */
-
-static int dir_e_search(struct gfs2_inode *dip, struct qstr *filename,
- struct gfs2_inum *inum, unsigned int *type)
-{
- struct buffer_head *bh;
- struct gfs2_dirent *dent;
- int error;
-
- error = linked_leaf_search(dip, filename, &dent, NULL, &bh);
- if (error)
- return error;
-
- if (inum)
- gfs2_inum_in(inum, (char *)&dent->de_inum);
- if (type)
- *type = dent->de_type;
-
- brelse(bh);
-
- return 0;
-}
-
-static int dir_e_add(struct gfs2_inode *dip, struct qstr *filename,
- struct gfs2_inum *inum, unsigned int type)
-{
- struct buffer_head *bh, *nbh, *dibh;
- struct gfs2_leaf *leaf, *nleaf;
- struct gfs2_dirent *dent;
- uint32_t hsize, index;
- uint32_t hash;
- uint64_t leaf_no, bn;
- int error;
-
- restart:
- hsize = 1 << dip->i_di.di_depth;
- if (hsize * sizeof(uint64_t) != dip->i_di.di_size) {
- gfs2_consist_inode(dip);
- return -EIO;
- }
-
- /* Figure out the address of the leaf node. */
-
- hash = gfs2_disk_hash(filename->name, filename->len);
- index = hash >> (32 - dip->i_di.di_depth);
-
- error = get_leaf_nr(dip, index, &leaf_no);
- if (error)
- return error;
-
- /* Add entry to the leaf */
-
- for (;;) {
- error = get_leaf(dip, leaf_no, &bh);
- if (error)
- return error;
-
- leaf = (struct gfs2_leaf *)bh->b_data;
-
- if (gfs2_dirent_alloc(dip, bh, filename->len, &dent)) {
-
- if (be16_to_cpu(leaf->lf_depth) < dip->i_di.di_depth) {
- /* Can we split the leaf? */
-
- brelse(bh);
-
- error = dir_split_leaf(dip, index, leaf_no);
- if (error)
- return error;
-
- goto restart;
-
- } else if (dip->i_di.di_depth < GFS2_DIR_MAX_DEPTH) {
- /* Can we double the hash table? */
-
- brelse(bh);
-
- error = dir_double_exhash(dip);
- if (error)
- return error;
-
- goto restart;
-
- } else if (leaf->lf_next) {
- /* Can we try the next leaf in the list? */
- leaf_no = be64_to_cpu(leaf->lf_next);
- brelse(bh);
- continue;
-
- } else {
- /* Create a new leaf and add it to the list. */
-
- bn = gfs2_alloc_meta(dip);
-
- nbh = gfs2_meta_new(dip->i_gl, bn);
- gfs2_trans_add_bh(dip->i_gl, nbh, 1);
- gfs2_metatype_set(nbh,
- GFS2_METATYPE_LF,
- GFS2_FORMAT_LF);
- gfs2_buffer_clear_tail(nbh,
- sizeof(struct gfs2_meta_header));
-
- gfs2_trans_add_bh(dip->i_gl, bh, 1);
- leaf->lf_next = cpu_to_be64(bn);
-
- nleaf = (struct gfs2_leaf *)nbh->b_data;
- nleaf->lf_depth = leaf->lf_depth;
- nleaf->lf_dirent_format = cpu_to_be32(GFS2_FORMAT_DE);
-
- gfs2_dirent_alloc(dip, nbh, filename->len,
- &dent);
-
- dip->i_di.di_blocks++;
-
- brelse(bh);
-
- bh = nbh;
- leaf = nleaf;
- }
- }
-
- /* If the gfs2_dirent_alloc() succeeded, it pinned the "bh" */
-
- gfs2_inum_out(inum, (char *)&dent->de_inum);
- dent->de_hash = cpu_to_be32(hash);
- dent->de_type = type;
- memcpy((char *)(dent + 1), filename->name, filename->len);
-
- leaf->lf_entries = be16_to_cpu(leaf->lf_entries) + 1;
- leaf->lf_entries = cpu_to_be16(leaf->lf_entries);
-
- brelse(bh);
-
- error = gfs2_meta_inode_buffer(dip, &dibh);
- if (error)
- return error;
-
- dip->i_di.di_entries++;
- dip->i_di.di_mtime = dip->i_di.di_ctime = get_seconds();
-
- gfs2_trans_add_bh(dip->i_gl, dibh, 1);
- gfs2_dinode_out(&dip->i_di, dibh->b_data);
- brelse(dibh);
-
- return 0;
- }
-
- return -ENOENT;
-}
-
-static int dir_e_del(struct gfs2_inode *dip, struct qstr *filename)
-{
- struct buffer_head *bh, *dibh;
- struct gfs2_dirent *dent, *prev;
- struct gfs2_leaf *leaf;
- unsigned int entries;
- int error;
-
- error = linked_leaf_search(dip, filename, &dent, &prev, &bh);
- if (error == -ENOENT) {
- gfs2_consist_inode(dip);
- return -EIO;
- }
- if (error)
- return error;
-
- dirent_del(dip, bh, prev, dent); /* Pins bh */
-
- leaf = (struct gfs2_leaf *)bh->b_data;
- entries = be16_to_cpu(leaf->lf_entries);
- if (!entries)
- gfs2_consist_inode(dip);
- entries--;
- leaf->lf_entries = cpu_to_be16(entries);
-
- brelse(bh);
-
- error = gfs2_meta_inode_buffer(dip, &dibh);
- if (error)
- return error;
-
- if (!dip->i_di.di_entries)
- gfs2_consist_inode(dip);
- dip->i_di.di_entries--;
- dip->i_di.di_mtime = dip->i_di.di_ctime = get_seconds();
-
- gfs2_trans_add_bh(dip->i_gl, dibh, 1);
- gfs2_dinode_out(&dip->i_di, dibh->b_data);
- brelse(dibh);
-
- return 0;
-}
-
-/**
- * dir_e_read - Reads the entries from a directory into a filldir buffer
- * @dip: dinode pointer
- * @offset: the hash of the last entry read shifted to the right once
- * @opaque: buffer for the filldir function to fill
- * @filldir: points to the filldir function to use
- *
- * Returns: errno
- */
-
-static int dir_e_read(struct gfs2_inode *dip, uint64_t *offset, void *opaque,
- gfs2_filldir_t filldir)
-{
- struct gfs2_sbd *sdp = dip->i_sbd;
- struct buffer_head *bh;
- struct gfs2_leaf leaf;
- uint32_t hsize, len;
- uint32_t ht_offset, lp_offset, ht_offset_cur = -1;
- uint32_t hash, index;
- uint64_t *lp;
- int copied = 0;
- int error = 0;
-
- hsize = 1 << dip->i_di.di_depth;
- if (hsize * sizeof(uint64_t) != dip->i_di.di_size) {
- gfs2_consist_inode(dip);
- return -EIO;
- }
-
- hash = gfs2_dir_offset2hash(*offset);
- index = hash >> (32 - dip->i_di.di_depth);
-
- lp = kmalloc(sdp->sd_hash_bsize, GFP_KERNEL);
- if (!lp)
- return -ENOMEM;
-
- while (index < hsize) {
- lp_offset = index & (sdp->sd_hash_ptrs - 1);
- ht_offset = index - lp_offset;
-
- if (ht_offset_cur != ht_offset) {
- error = gfs2_dir_read_data(dip, (char *)lp,
- ht_offset * sizeof(uint64_t),
- sdp->sd_hash_bsize);
- if (error != sdp->sd_hash_bsize) {
- if (error >= 0)
- error = -EIO;
- goto out;
- }
- ht_offset_cur = ht_offset;
- }
-
- error = get_leaf(dip, be64_to_cpu(lp[lp_offset]), &bh);
- if (error)
- goto out;
-
- gfs2_leaf_in(&leaf, bh->b_data);
-
- if (leaf.lf_next)
- error = do_filldir_multi(dip, offset, opaque, filldir,
- bh, &copied);
- else
- error = do_filldir_single(dip, offset, opaque, filldir,
- bh, leaf.lf_entries, &copied);
-
- brelse(bh);
-
- if (error) {
- if (error > 0)
- error = 0;
- goto out;
- }
-
- len = 1 << (dip->i_di.di_depth - leaf.lf_depth);
- index = (index & ~(len - 1)) + len;
- }
-
- out:
- kfree(lp);
-
- return error;
-}
-
-static int dir_e_mvino(struct gfs2_inode *dip, struct qstr *filename,
- struct gfs2_inum *inum, unsigned int new_type)
-{
- struct buffer_head *bh, *dibh;
- struct gfs2_dirent *dent;
- int error;
-
- error = linked_leaf_search(dip, filename, &dent, NULL, &bh);
- if (error == -ENOENT) {
- gfs2_consist_inode(dip);
- return -EIO;
- }
- if (error)
- return error;
-
- gfs2_trans_add_bh(dip->i_gl, bh, 1);
-
- gfs2_inum_out(inum, (char *)&dent->de_inum);
- dent->de_type = new_type;
-
- brelse(bh);
-
- error = gfs2_meta_inode_buffer(dip, &dibh);
- if (error)
- return error;
-
- dip->i_di.di_mtime = dip->i_di.di_ctime = get_seconds();
-
- gfs2_trans_add_bh(dip->i_gl, dibh, 1);
- gfs2_dinode_out(&dip->i_di, dibh->b_data);
- brelse(dibh);
-
- return 0;
-}
-
-/**
- * dir_l_search - Search linear (stuffed dinode) dir for inode matching name
- * @dip: The GFS2 inode
- * @filename: Filename string
- * @inode: If non-NULL, function fills with formal inode # and block address
- * @type: If non-NULL, function fills with DT_... dinode type
- *
- * Returns:
- */
-
-static int dir_l_search(struct gfs2_inode *dip, struct qstr *filename,
- struct gfs2_inum *inum, unsigned int *type)
-{
- struct buffer_head *dibh;
- struct gfs2_dirent *dent;
- int error;
-
- if (!gfs2_is_stuffed(dip)) {
- gfs2_consist_inode(dip);
- return -EIO;
- }
-
- error = gfs2_meta_inode_buffer(dip, &dibh);
- if (error)
- return error;
-
- error = leaf_search(dip, dibh, filename, &dent, NULL);
- if (!error) {
- if (inum)
- gfs2_inum_in(inum, (char *)&dent->de_inum);
- if (type)
- *type = dent->de_type;
- }
-
- brelse(dibh);
-
- return error;
-}
-
-static int dir_l_add(struct gfs2_inode *dip, struct qstr *filename,
- struct gfs2_inum *inum, unsigned int type)
-{
- struct buffer_head *dibh;
- struct gfs2_dirent *dent;
- int error;
-
- if (!gfs2_is_stuffed(dip)) {
- gfs2_consist_inode(dip);
- return -EIO;
- }
-
- error = gfs2_meta_inode_buffer(dip, &dibh);
- if (error)
- return error;
-
- if (gfs2_dirent_alloc(dip, dibh, filename->len, &dent)) {
- brelse(dibh);
-
- error = dir_make_exhash(dip);
- if (!error)
- error = dir_e_add(dip, filename, inum, type);
-
- return error;
- }
-
- /* gfs2_dirent_alloc() pins */
-
- gfs2_inum_out(inum, (char *)&dent->de_inum);
- dent->de_hash = gfs2_disk_hash(filename->name, filename->len);
- dent->de_hash = cpu_to_be32(dent->de_hash);
- dent->de_type = type;
- memcpy((char *)(dent + 1), filename->name, filename->len);
-
- dip->i_di.di_entries++;
- dip->i_di.di_mtime = dip->i_di.di_ctime = get_seconds();
-
- gfs2_dinode_out(&dip->i_di, dibh->b_data);
- brelse(dibh);
-
- return 0;
-}
-
-static int dir_l_del(struct gfs2_inode *dip, struct qstr *filename)
-{
- struct buffer_head *dibh;
- struct gfs2_dirent *dent, *prev;
- int error;
-
- if (!gfs2_is_stuffed(dip)) {
- gfs2_consist_inode(dip);
- return -EIO;
- }
-
- error = gfs2_meta_inode_buffer(dip, &dibh);
- if (error)
- return error;
-
- error = leaf_search(dip, dibh, filename, &dent, &prev);
- if (error == -ENOENT) {
- gfs2_consist_inode(dip);
- error = -EIO;
- goto out;
- }
- if (error)
- goto out;
+ (*offset)++;
- dirent_del(dip, dibh, prev, dent);
+ return 0;
+}
- /* dirent_del() pins */
+static int gfs2_dir_read_leaf(struct inode *inode, u64 *offset, void *opaque,
+ gfs2_filldir_t filldir, int *copied,
+ unsigned *depth, u64 leaf_no)
+{
+ struct gfs2_inode *ip = inode->u.generic_ip;
+ struct buffer_head *bh;
+ struct gfs2_leaf *lf;
+ unsigned entries = 0;
+ unsigned leaves = 0;
+ const struct gfs2_dirent **darr, *dent;
+ struct dirent_gather g;
+ struct buffer_head **larr;
+ int leaf = 0;
+ int error, i;
+ u64 lfn = leaf_no;
- if (!dip->i_di.di_entries)
- gfs2_consist_inode(dip);
- dip->i_di.di_entries--;
+ do {
+ error = get_leaf(ip, lfn, &bh);
+ if (error)
+ goto out;
+ lf = (struct gfs2_leaf *)bh->b_data;
+ if (leaves == 0)
+ *depth = be16_to_cpu(lf->lf_depth);
+ entries += be16_to_cpu(lf->lf_entries);
+ leaves++;
+ lfn = be64_to_cpu(lf->lf_next);
+ brelse(bh);
+ } while(lfn);
- dip->i_di.di_mtime = dip->i_di.di_ctime = get_seconds();
+ if (!entries)
+ return 0;
- gfs2_dinode_out(&dip->i_di, dibh->b_data);
+ error = -ENOMEM;
+ larr = vmalloc((leaves + entries) * sizeof(void*));
+ if (!larr)
+ goto out;
+ darr = (const struct gfs2_dirent **)(larr + leaves);
+ g.pdent = darr;
+ g.offset = 0;
+ lfn = leaf_no;
- out:
- brelse(dibh);
+ do {
+ error = get_leaf(ip, lfn, &bh);
+ if (error)
+ goto out_kfree;
+ lf = (struct gfs2_leaf *)bh->b_data;
+ lfn = be64_to_cpu(lf->lf_next);
+ if (lf->lf_entries) {
+ dent = gfs2_dirent_scan(inode, bh->b_data, bh->b_size,
+ gfs2_dirent_gather, NULL, &g);
+ error = PTR_ERR(dent);
+ if (IS_ERR(dent)) {
+ goto out_kfree;
+ }
+ error = 0;
+ larr[leaf++] = bh;
+ } else {
+ brelse(bh);
+ }
+ } while(lfn);
+ error = do_filldir_main(ip, offset, opaque, filldir, darr,
+ entries, copied);
+out_kfree:
+ for(i = 0; i < leaf; i++)
+ brelse(larr[i]);
+ vfree(larr);
+out:
return error;
}
-static int dir_l_read(struct gfs2_inode *dip, uint64_t *offset, void *opaque,
+/**
+ * dir_e_read - Reads the entries from a directory into a filldir buffer
+ * @dip: dinode pointer
+ * @offset: the hash of the last entry read shifted to the right once
+ * @opaque: buffer for the filldir function to fill
+ * @filldir: points to the filldir function to use
+ *
+ * Returns: errno
+ */
+
+static int dir_e_read(struct inode *inode, uint64_t *offset, void *opaque,
gfs2_filldir_t filldir)
{
- struct buffer_head *dibh;
+ 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;
int copied = 0;
- int error;
+ int error = 0;
+ unsigned depth;
- if (!gfs2_is_stuffed(dip)) {
+ hsize = 1 << dip->i_di.di_depth;
+ if (hsize * sizeof(uint64_t) != dip->i_di.di_size) {
gfs2_consist_inode(dip);
return -EIO;
}
- if (!dip->i_di.di_entries)
- return 0;
+ hash = gfs2_dir_offset2hash(*offset);
+ index = hash >> (32 - dip->i_di.di_depth);
- error = gfs2_meta_inode_buffer(dip, &dibh);
- if (error)
- return error;
+ lp = kmalloc(sdp->sd_hash_bsize, GFP_KERNEL);
+ if (!lp)
+ return -ENOMEM;
- error = do_filldir_single(dip, offset,
- opaque, filldir,
- dibh, dip->i_di.di_entries,
- &copied);
- if (error > 0)
- error = 0;
+ while (index < hsize) {
+ lp_offset = index & (sdp->sd_hash_ptrs - 1);
+ ht_offset = index - lp_offset;
- brelse(dibh);
+ if (ht_offset_cur != ht_offset) {
+ error = gfs2_dir_read_data(dip, (char *)lp,
+ ht_offset * sizeof(uint64_t),
+ sdp->sd_hash_bsize);
+ if (error != sdp->sd_hash_bsize) {
+ if (error >= 0)
+ error = -EIO;
+ goto out;
+ }
+ ht_offset_cur = ht_offset;
+ }
+
+ error = gfs2_dir_read_leaf(inode, offset, opaque, filldir,
+ &copied, &depth,
+ be64_to_cpu(lp[lp_offset]));
+ if (error)
+ break;
+
+ len = 1 << (dip->i_di.di_depth - depth);
+ index = (index & ~(len - 1)) + len;
+ }
+out:
+ kfree(lp);
+ if (error > 0)
+ error = 0;
return error;
}
-static int dir_l_mvino(struct gfs2_inode *dip, struct qstr *filename,
- struct gfs2_inum *inum, unsigned int new_type)
+int gfs2_dir_read(struct inode *inode, uint64_t *offset, void *opaque,
+ gfs2_filldir_t filldir)
{
+ struct gfs2_inode *dip = inode->u.generic_ip;
+ struct dirent_gather g;
+ const struct gfs2_dirent **darr, *dent;
struct buffer_head *dibh;
- struct gfs2_dirent *dent;
+ int copied = 0;
int error;
+ if (!dip->i_di.di_entries)
+ return 0;
+
+ if (dip->i_di.di_flags & GFS2_DIF_EXHASH)
+ return dir_e_read(inode, offset, opaque, filldir);
+
if (!gfs2_is_stuffed(dip)) {
gfs2_consist_inode(dip);
return -EIO;
if (error)
return error;
- error = leaf_search(dip, dibh, filename, &dent, NULL);
- if (error == -ENOENT) {
- gfs2_consist_inode(dip);
- error = -EIO;
- goto out;
+ error = -ENOMEM;
+ darr = kmalloc(dip->i_di.di_entries * sizeof(struct gfs2_dirent *),
+ GFP_KERNEL);
+ if (darr) {
+ g.pdent = darr;
+ g.offset = 0;
+ dent = gfs2_dirent_scan(inode, dibh->b_data, dibh->b_size,
+ gfs2_dirent_gather, NULL, &g);
+ if (IS_ERR(dent)) {
+ error = PTR_ERR(dent);
+ goto out;
+ }
+ error = do_filldir_main(dip, offset, opaque, filldir, darr,
+ dip->i_di.di_entries, &copied);
+out:
+ kfree(darr);
}
- if (error)
- goto out;
-
- gfs2_trans_add_bh(dip->i_gl, dibh, 1);
-
- gfs2_inum_out(inum, (char *)&dent->de_inum);
- dent->de_type = new_type;
- dip->i_di.di_mtime = dip->i_di.di_ctime = get_seconds();
-
- gfs2_dinode_out(&dip->i_di, dibh->b_data);
+ if (error > 0)
+ error = 0;
- out:
brelse(dibh);
return error;
* Returns: errno
*/
-int gfs2_dir_search(struct gfs2_inode *dip, struct qstr *filename,
+int gfs2_dir_search(struct inode *dir, const struct qstr *name,
struct gfs2_inum *inum, unsigned int *type)
{
+ struct buffer_head *bh;
+ struct gfs2_dirent *dent;
+
+ dent = gfs2_dirent_search(dir, name, gfs2_dirent_find, &bh);
+ if (dent) {
+ if (IS_ERR(dent))
+ return PTR_ERR(dent);
+ if (inum)
+ gfs2_inum_in(inum, (char *)&dent->de_inum);
+ if (type)
+ *type = be16_to_cpu(dent->de_type);
+ brelse(bh);
+ return 0;
+ }
+ 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_leaf *leaf, *oleaf;
int error;
+ u32 index;
+ u64 bn;
- if (dip->i_di.di_flags & GFS2_DIF_EXHASH)
- error = dir_e_search(dip, filename, inum, type);
- else
- error = dir_l_search(dip, filename, inum, type);
+ index = name->hash >> (32 - ip->i_di.di_depth);
+ error = get_first_leaf(ip, index, &obh);
+ if (error)
+ return error;
+ do {
+ oleaf = (struct gfs2_leaf *)obh->b_data;
+ bn = be64_to_cpu(oleaf->lf_next);
+ if (!bn)
+ break;
+ brelse(obh);
+ error = get_leaf(ip, bn, &obh);
+ if (error)
+ return error;
+ } while(1);
- return error;
+ gfs2_trans_add_bh(ip->i_gl, obh, 1);
+
+ leaf = new_leaf(inode, &bh, be16_to_cpu(oleaf->lf_depth));
+ if (!leaf) {
+ brelse(obh);
+ return -ENOSPC;
+ }
+ oleaf->lf_next = cpu_to_be64(bh->b_blocknr);
+ brelse(bh);
+ brelse(obh);
+
+ error = gfs2_meta_inode_buffer(ip, &bh);
+ if (error)
+ 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);
+ brelse(bh);
+ return 0;
}
/**
* Returns: 0 on success, error code on failure
*/
-int gfs2_dir_add(struct gfs2_inode *dip, struct qstr *filename,
- struct gfs2_inum *inum, unsigned int type)
+int gfs2_dir_add(struct inode *inode, const struct qstr *name,
+ const struct gfs2_inum *inum, unsigned type)
{
+ struct gfs2_inode *ip = inode->u.generic_ip;
+ struct buffer_head *bh;
+ struct gfs2_dirent *dent;
+ struct gfs2_leaf *leaf;
int error;
- if (dip->i_di.di_flags & GFS2_DIF_EXHASH)
- error = dir_e_add(dip, filename, inum, type);
- else
- error = dir_l_add(dip, filename, inum, type);
-
+ while(1) {
+ dent = gfs2_dirent_search(inode, name, gfs2_dirent_find_space,
+ &bh);
+ if (dent) {
+ if (IS_ERR(dent))
+ return PTR_ERR(dent);
+ dent = gfs2_init_dirent(inode, dent, name, bh);
+ gfs2_inum_out(inum, (char *)&dent->de_inum);
+ dent->de_type = cpu_to_be16(type);
+ if (ip->i_di.di_flags & GFS2_DIF_EXHASH) {
+ leaf = (struct gfs2_leaf *)bh->b_data;
+ leaf->lf_entries = cpu_to_be16(be16_to_cpu(leaf->lf_entries) + 1);
+ }
+ brelse(bh);
+ error = gfs2_meta_inode_buffer(ip, &bh);
+ if (error)
+ 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);
+ brelse(bh);
+ error = 0;
+ break;
+ }
+ if (!(ip->i_di.di_flags & GFS2_DIF_EXHASH)) {
+ error = dir_make_exhash(inode);
+ if (error)
+ break;
+ continue;
+ }
+ error = dir_split_leaf(inode, name);
+ if (error == 0)
+ continue;
+ if (error < 0)
+ break;
+ if (ip->i_di.di_depth < GFS2_DIR_MAX_DEPTH) {
+ error = dir_double_exhash(ip);
+ if (error)
+ break;
+ error = dir_split_leaf(inode, name);
+ if (error < 0)
+ break;
+ if (error == 0)
+ continue;
+ }
+ error = dir_new_leaf(inode, name);
+ if (!error)
+ continue;
+ error = -ENOSPC;
+ break;
+ }
return error;
}
+
/**
* gfs2_dir_del - Delete a directory entry
* @dip: The GFS2 inode
* Returns: 0 on success, error code on failure
*/
-int gfs2_dir_del(struct gfs2_inode *dip, struct qstr *filename)
+int gfs2_dir_del(struct gfs2_inode *dip, const struct qstr *name)
{
+ struct gfs2_dirent *dent, *prev = NULL;
+ struct buffer_head *bh;
int error;
- if (dip->i_di.di_flags & GFS2_DIF_EXHASH)
- error = dir_e_del(dip, filename);
- else
- error = dir_l_del(dip, filename);
+ /* 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);
+ if (!dent) {
+ gfs2_consist_inode(dip);
+ return -EIO;
+ }
+ if (IS_ERR(dent)) {
+ gfs2_consist_inode(dip);
+ return PTR_ERR(dent);
+ }
+ /* If not first in block, adjust pointers accordingly */
+ if (gfs2_dirent_find(dent, name, NULL) == 0) {
+ prev = dent;
+ dent = (struct gfs2_dirent *)((char *)dent + be16_to_cpu(prev->de_rec_len));
+ }
- return error;
-}
+ dirent_del(dip, bh, prev, dent);
+ if (dip->i_di.di_flags & GFS2_DIF_EXHASH) {
+ struct gfs2_leaf *leaf = (struct gfs2_leaf *)bh->b_data;
+ u16 entries = be16_to_cpu(leaf->lf_entries);
+ if (!entries)
+ gfs2_consist_inode(dip);
+ leaf->lf_entries = cpu_to_be16(--entries);
+ }
+ brelse(bh);
-int gfs2_dir_read(struct gfs2_inode *dip, uint64_t *offset, void *opaque,
- gfs2_filldir_t filldir)
-{
- int error;
+ error = gfs2_meta_inode_buffer(dip, &bh);
+ if (error)
+ return error;
- if (dip->i_di.di_flags & GFS2_DIF_EXHASH)
- error = dir_e_read(dip, offset, opaque, filldir);
- else
- error = dir_l_read(dip, offset, opaque, filldir);
+ if (!dip->i_di.di_entries)
+ 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);
+ brelse(bh);
return error;
}
* Returns: errno
*/
-int gfs2_dir_mvino(struct gfs2_inode *dip, struct qstr *filename,
+int gfs2_dir_mvino(struct gfs2_inode *dip, const struct qstr *filename,
struct gfs2_inum *inum, unsigned int new_type)
{
+ struct buffer_head *bh;
+ struct gfs2_dirent *dent;
int error;
- if (dip->i_di.di_flags & GFS2_DIF_EXHASH)
- error = dir_e_mvino(dip, filename, inum, new_type);
- else
- error = dir_l_mvino(dip, filename, inum, new_type);
+ dent = gfs2_dirent_search(dip->i_vnode, filename, gfs2_dirent_find, &bh);
+ if (!dent) {
+ gfs2_consist_inode(dip);
+ return -EIO;
+ }
+ if (IS_ERR(dent))
+ return PTR_ERR(dent);
- return error;
+ gfs2_trans_add_bh(dip->i_gl, bh, 1);
+ gfs2_inum_out(inum, (char *)&dent->de_inum);
+ dent->de_type = cpu_to_be16(new_type);
+
+ if (dip->i_di.di_flags & GFS2_DIF_EXHASH) {
+ brelse(bh);
+ error = gfs2_meta_inode_buffer(dip, &bh);
+ if (error)
+ return error;
+ 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);
+ brelse(bh);
+ return 0;
}
/**
{
struct gfs2_sbd *sdp = dip->i_sbd;
struct buffer_head *bh;
- struct gfs2_leaf leaf;
+ struct gfs2_leaf *leaf;
uint32_t hsize, len;
uint32_t ht_offset, lp_offset, ht_offset_cur = -1;
uint32_t index = 0;
error = get_leaf(dip, leaf_no, &bh);
if (error)
goto out;
- gfs2_leaf_in(&leaf, bh->b_data);
+ leaf = (struct gfs2_leaf *)bh->b_data;
brelse(bh);
- len = 1 << (dip->i_di.di_depth - leaf.lf_depth);
+ len = 1 << (dip->i_di.di_depth - be16_to_cpu(leaf->lf_depth));
error = lc(dip, index, len, leaf_no, data);
if (error)
uint64_t leaf_no, void *data)
{
struct gfs2_sbd *sdp = dip->i_sbd;
- struct gfs2_leaf tmp_leaf;
+ struct gfs2_leaf *tmp_leaf;
struct gfs2_rgrp_list rlist;
struct buffer_head *bh, *dibh;
- uint64_t blk;
+ uint64_t blk, nblk;
unsigned int rg_blocks = 0, l_blocks = 0;
char *ht;
unsigned int x, size = len * sizeof(uint64_t);
/* Count the number of leaves */
- for (blk = leaf_no; blk; blk = tmp_leaf.lf_next) {
+ for (blk = leaf_no; blk; blk = nblk) {
error = get_leaf(dip, blk, &bh);
if (error)
goto out_rlist;
- gfs2_leaf_in(&tmp_leaf, (bh)->b_data);
+ tmp_leaf = (struct gfs2_leaf *)bh->b_data;
+ nblk = be64_to_cpu(tmp_leaf->lf_next);
brelse(bh);
gfs2_rlist_add(sdp, &rlist, blk);
for (x = 0; x < rlist.rl_rgrps; x++) {
struct gfs2_rgrpd *rgd;
- rgd = get_gl2rgd(rlist.rl_ghs[x].gh_gl);
+ rgd = rlist.rl_ghs[x].gh_gl->gl_object;
rg_blocks += rgd->rd_ri.ri_length;
}
goto out_rlist;
error = gfs2_trans_begin(sdp,
- rg_blocks + (DIV_RU(size, sdp->sd_jbsize) + 1) +
+ rg_blocks + (DIV_ROUND_UP(size, sdp->sd_jbsize) + 1) +
RES_DINODE + RES_STATFS + RES_QUOTA, l_blocks);
if (error)
goto out_rg_gunlock;
- for (blk = leaf_no; blk; blk = tmp_leaf.lf_next) {
+ for (blk = leaf_no; blk; blk = nblk) {
error = get_leaf(dip, blk, &bh);
if (error)
goto out_end_trans;
- gfs2_leaf_in(&tmp_leaf, bh->b_data);
+ tmp_leaf = (struct gfs2_leaf *)bh->b_data;
+ nblk = be64_to_cpu(tmp_leaf->lf_next);
brelse(bh);
gfs2_free_meta(dip, blk, 1);
error = gfs2_meta_inode_buffer(dip, &bh);
if (!error) {
gfs2_trans_add_bh(dip->i_gl, bh, 1);
- ((struct gfs2_dinode *)bh->b_data)->di_mode = cpu_to_be32(S_IFREG);
+ ((struct gfs2_dinode *)bh->b_data)->di_mode =
+ cpu_to_be32(S_IFREG);
brelse(bh);
}
* gfs2_diradd_alloc_required - find if adding entry will require an allocation
* @ip: the file being written to
* @filname: the filename that's going to be added
- * @alloc_required: set to 1 if an alloc is required, 0 otherwise
*
- * Returns: errno
+ * Returns: 1 if alloc required, 0 if not, -ve on error
*/
-int gfs2_diradd_alloc_required(struct gfs2_inode *dip, struct qstr *filename,
- int *alloc_required)
+int gfs2_diradd_alloc_required(struct inode *inode, const struct qstr *name)
{
- struct buffer_head *bh = NULL, *bh_next;
- uint32_t hsize, hash, index;
- int error = 0;
-
- *alloc_required = 0;
-
- if (dip->i_di.di_flags & GFS2_DIF_EXHASH) {
- hsize = 1 << dip->i_di.di_depth;
- if (hsize * sizeof(uint64_t) != dip->i_di.di_size) {
- gfs2_consist_inode(dip);
- return -EIO;
- }
-
- hash = gfs2_disk_hash(filename->name, filename->len);
- index = hash >> (32 - dip->i_di.di_depth);
-
- error = get_first_leaf(dip, index, &bh_next);
- if (error)
- return error;
-
- do {
- brelse(bh);
-
- bh = bh_next;
-
- if (dirent_fits(dip, bh, filename->len))
- break;
-
- error = get_next_leaf(dip, bh, &bh_next);
- if (error == -ENOENT) {
- *alloc_required = 1;
- error = 0;
- break;
- }
- }
- while (!error);
-
- brelse(bh);
- } else {
- error = gfs2_meta_inode_buffer(dip, &bh);
- if (error)
- return error;
-
- if (!dirent_fits(dip, bh, filename->len))
- *alloc_required = 1;
+ struct gfs2_dirent *dent;
+ struct buffer_head *bh;
- brelse(bh);
+ dent = gfs2_dirent_search(inode, name, gfs2_dirent_find_space, &bh);
+ if (!dent) {
+ return 1;
}
-
- return error;
+ if (IS_ERR(dent))
+ return PTR_ERR(dent);
+ brelse(bh);
+ return 0;
}
projects / powerpc.git / blobdiff