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ubifs: split allocation of ubifs_info into a separate function

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preparation to ubifs sget() race fixes

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2011-06-12 10:07:03 -04:00
parent ff78fca2a0
commit b1c27ab3f9
1 changed files with 48 additions and 39 deletions
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25
fs/ubifs/super.c
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@ -1971,17 +1971,12 @@ static struct ubi_volume_desc *open_ubi(const char *name, int mode)
return ERR_PTR(-EINVAL);
}
static int ubifs_fill_super(struct super_block *sb, void *data, int silent)
static struct ubifs_info *alloc_ubifs_info(struct ubi_volume_desc *ubi)
{
struct ubi_volume_desc *ubi = sb->s_fs_info;
struct ubifs_info *c;
struct inode *root;
int err;
c = kzalloc(sizeof(struct ubifs_info), GFP_KERNEL);
if (!c)
return -ENOMEM;
if (c) {
spin_lock_init(&c->cnt_lock);
spin_lock_init(&c->cs_lock);
spin_lock_init(&c->buds_lock);
@ -2014,13 +2009,27 @@ static int ubifs_fill_super(struct super_block *sb, void *data, int silent)
INIT_LIST_HEAD(&c->orph_new);
c->no_chk_data_crc = 1;
c->vfs_sb = sb;
c->highest_inum = UBIFS_FIRST_INO;
c->lhead_lnum = c->ltail_lnum = UBIFS_LOG_LNUM;
ubi_get_volume_info(ubi, &c->vi);
ubi_get_device_info(c->vi.ubi_num, &c->di);
}
return c;
}
static int ubifs_fill_super(struct super_block *sb, void *data, int silent)
{
struct ubi_volume_desc *ubi = sb->s_fs_info;
struct ubifs_info *c;
struct inode *root;
int err;
c = alloc_ubifs_info(ubi);
if (!c)
return -ENOMEM;
c->vfs_sb = sb;
/* Re-open the UBI device in read-write mode */
c->ubi = ubi_open_volume(c->vi.ubi_num, c->vi.vol_id, UBI_READWRITE);
if (IS_ERR(c->ubi)) {