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iget: stop ISOFS from using read_inode() 

Stop the ISOFS filesystem from using read_inode().  Make isofs_read_inode()
return an error code, and make isofs_iget() pass it on.

Signed-off-by: David Howells <dhowells@redhat.com>
Cc: Jan Kara <jack@ucw.cz>
Acked-by: Christoph Hellwig <hch@lst.de>
Cc: "Dave Young" <hidave.darkstar@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
David Howells 2008-02-07 00:15:41 -08:00 committed by Linus Torvalds
parent 635253915b
commit c4386c83bf
4 changed files with 58 additions and 32 deletions
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14
fs/isofs/export.c
View File

@ -26,11 +26,9 @@ isofs_export_iget(struct super_block *sb,
if (block == 0)
return ERR_PTR(-ESTALE);
inode = isofs_iget(sb, block, offset);
if (inode == NULL)
return ERR_PTR(-ENOMEM);
if (is_bad_inode(inode)
|| (generation && inode->i_generation != generation))
{
if (IS_ERR(inode))
return ERR_CAST(inode);
if (generation && inode->i_generation != generation) {
iput(inode);
return ERR_PTR(-ESTALE);
}
@ -110,8 +108,10 @@ static struct dentry *isofs_export_get_parent(struct dentry *child)
parent_inode = isofs_iget(child_inode->i_sb,
parent_block,
parent_offset);
if (parent_inode == NULL) {
rv = ERR_PTR(-EACCES);
if (IS_ERR(parent_inode)) {
rv = ERR_CAST(parent_inode);
if (rv != ERR_PTR(-ENOMEM))
rv = ERR_PTR(-EACCES);
goto out;
}

68
fs/isofs/inode.c
View File

@ -54,7 +54,7 @@ static void isofs_put_super(struct super_block *sb)
return;
}
static void isofs_read_inode(struct inode *);
static int isofs_read_inode(struct inode *);
static int isofs_statfs (struct dentry *, struct kstatfs *);
static struct kmem_cache *isofs_inode_cachep;
@ -107,7 +107,6 @@ static int isofs_remount(struct super_block *sb, int *flags, char *data)
static const struct super_operations isofs_sops = {
.alloc_inode = isofs_alloc_inode,
.destroy_inode = isofs_destroy_inode,
.read_inode = isofs_read_inode,
.put_super = isofs_put_super,
.statfs = isofs_statfs,
.remount_fs = isofs_remount,
@ -552,7 +551,7 @@ static int isofs_fill_super(struct super_block *s, void *data, int silent)
int joliet_level = 0;
int iso_blknum, block;
int orig_zonesize;
int table;
int table, error = -EINVAL;
unsigned int vol_desc_start;
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
@ -810,6 +809,8 @@ root_found:
* we then decide whether to use the Joliet descriptor.
*/
inode = isofs_iget(s, sbi->s_firstdatazone, 0);
if (IS_ERR(inode))
goto out_no_root;
/*
* If this disk has both Rock Ridge and Joliet on it, then we
@ -829,6 +830,8 @@ root_found:
"ISOFS: changing to secondary root\n");
iput(inode);
inode = isofs_iget(s, sbi->s_firstdatazone, 0);
if (IS_ERR(inode))
goto out_no_root;
}
}
@ -842,8 +845,6 @@ root_found:
sbi->s_joliet_level = joliet_level;
/* check the root inode */
if (!inode)
goto out_no_root;
if (!inode->i_op)
goto out_bad_root;
@ -876,11 +877,14 @@ root_found:
*/
out_bad_root:
printk(KERN_WARNING "%s: root inode not initialized\n", __func__);
goto out_iput;
out_no_root:
printk(KERN_WARNING "%s: get root inode failed\n", __func__);
out_iput:
iput(inode);
goto out_no_inode;
out_no_root:
error = PTR_ERR(inode);
if (error != -ENOMEM)
printk(KERN_WARNING "%s: get root inode failed\n", __func__);
out_no_inode:
#ifdef CONFIG_JOLIET
if (sbi->s_nls_iocharset)
unload_nls(sbi->s_nls_iocharset);
@ -908,7 +912,7 @@ out_freesbi:
kfree(opt.iocharset);
kfree(sbi);
s->s_fs_info = NULL;
return -EINVAL;
return error;
}
static int isofs_statfs (struct dentry *dentry, struct kstatfs *buf)
@ -930,7 +934,7 @@ static int isofs_statfs (struct dentry *dentry, struct kstatfs *buf)
/*
* Get a set of blocks; filling in buffer_heads if already allocated
* or getblk() if they are not. Returns the number of blocks inserted
* (0 == error.)
* (-ve == error.)
*/
int isofs_get_blocks(struct inode *inode, sector_t iblock_s,
struct buffer_head **bh, unsigned long nblocks)
@ -940,11 +944,12 @@ int isofs_get_blocks(struct inode *inode, sector_t iblock_s,
unsigned int firstext;
unsigned long nextblk, nextoff;
long iblock = (long)iblock_s;
int section, rv;
int section, rv, error;
struct iso_inode_info *ei = ISOFS_I(inode);
lock_kernel();
error = -EIO;
rv = 0;
if (iblock < 0 || iblock != iblock_s) {
printk(KERN_DEBUG "%s: block number too large\n", __func__);
@ -983,8 +988,10 @@ int isofs_get_blocks(struct inode *inode, sector_t iblock_s,
offset += sect_size;
ninode = isofs_iget(inode->i_sb, nextblk, nextoff);
if (!ninode)
if (IS_ERR(ninode)) {
error = PTR_ERR(ninode);
goto abort;
}
firstext = ISOFS_I(ninode)->i_first_extent;
sect_size = ISOFS_I(ninode)->i_section_size >> ISOFS_BUFFER_BITS(ninode);
nextblk = ISOFS_I(ninode)->i_next_section_block;
@ -1015,9 +1022,10 @@ int isofs_get_blocks(struct inode *inode, sector_t iblock_s,
rv++;
}
error = 0;
abort:
unlock_kernel();
return rv;
return rv != 0 ? rv : error;
}
/*
@ -1026,12 +1034,15 @@ abort:
static int isofs_get_block(struct inode *inode, sector_t iblock,
struct buffer_head *bh_result, int create)
{
int ret;
if (create) {
printk(KERN_DEBUG "%s: Kernel tries to allocate a block\n", __func__);
return -EROFS;
}
return isofs_get_blocks(inode, iblock, &bh_result, 1) ? 0 : -EIO;
ret = isofs_get_blocks(inode, iblock, &bh_result, 1);
return ret < 0 ? ret : 0;
}
static int isofs_bmap(struct inode *inode, sector_t block)
@ -1186,7 +1197,7 @@ out_toomany:
goto out;
}
static void isofs_read_inode(struct inode *inode)
static int isofs_read_inode(struct inode *inode)
{
struct super_block *sb = inode->i_sb;
struct isofs_sb_info *sbi = ISOFS_SB(sb);
@ -1199,6 +1210,7 @@ static void isofs_read_inode(struct inode *inode)
unsigned int de_len;
unsigned long offset;
struct iso_inode_info *ei = ISOFS_I(inode);
int ret = -EIO;
block = ei->i_iget5_block;
bh = sb_bread(inode->i_sb, block);
@ -1216,6 +1228,7 @@ static void isofs_read_inode(struct inode *inode)
tmpde = kmalloc(de_len, GFP_KERNEL);
if (tmpde == NULL) {
printk(KERN_INFO "%s: out of memory\n", __func__);
ret = -ENOMEM;
goto fail;
}
memcpy(tmpde, bh->b_data + offset, frag1);
@ -1259,8 +1272,10 @@ static void isofs_read_inode(struct inode *inode)
ei->i_section_size = isonum_733(de->size);
if (de->flags[-high_sierra] & 0x80) {
if(isofs_read_level3_size(inode))
ret = isofs_read_level3_size(inode);
if (ret < 0)
goto fail;
ret = -EIO;
} else {
ei->i_next_section_block = 0;
ei->i_next_section_offset = 0;
@ -1346,16 +1361,16 @@ static void isofs_read_inode(struct inode *inode)
/* XXX - parse_rock_ridge_inode() had already set i_rdev. */
init_special_inode(inode, inode->i_mode, inode->i_rdev);
ret = 0;
out:
kfree(tmpde);
if (bh)
brelse(bh);
return;
return ret;
out_badread:
printk(KERN_WARNING "ISOFS: unable to read i-node block\n");
fail:
make_bad_inode(inode);
goto out;
}
@ -1394,9 +1409,10 @@ struct inode *isofs_iget(struct super_block *sb,
unsigned long hashval;
struct inode *inode;
struct isofs_iget5_callback_data data;
long ret;
if (offset >= 1ul << sb->s_blocksize_bits)
return NULL;
return ERR_PTR(-EINVAL);
data.block = block;
data.offset = offset;
@ -1406,9 +1422,17 @@ struct inode *isofs_iget(struct super_block *sb,
inode = iget5_locked(sb, hashval, &isofs_iget5_test,
&isofs_iget5_set, &data);
if (inode && (inode->i_state & I_NEW)) {
sb->s_op->read_inode(inode);
unlock_new_inode(inode);
if (!inode)
return ERR_PTR(-ENOMEM);
if (inode->i_state & I_NEW) {
ret = isofs_read_inode(inode);
if (ret < 0) {
iget_failed(inode);
inode = ERR_PTR(ret);
} else {
unlock_new_inode(inode);
}
}
return inode;

4
fs/isofs/namei.c
View File

@ -179,9 +179,9 @@ struct dentry *isofs_lookup(struct inode *dir, struct dentry *dentry, struct nam
inode = NULL;
if (found) {
inode = isofs_iget(dir->i_sb, block, offset);
if (!inode) {
if (IS_ERR(inode)) {
unlock_kernel();
return ERR_PTR(-EACCES);
return ERR_CAST(inode);
}
}
unlock_kernel();

4
fs/isofs/rock.c
View File

@ -474,8 +474,10 @@ repeat:
isofs_iget(inode->i_sb,
ISOFS_I(inode)->i_first_extent,
0);
if (!reloc)
if (IS_ERR(reloc)) {
ret = PTR_ERR(reloc);
goto out;
}
inode->i_mode = reloc->i_mode;
inode->i_nlink = reloc->i_nlink;
inode->i_uid = reloc->i_uid;