struct au_dinfo *au_di_alloc(struct super_block *sb, unsigned int lsc)
{
struct au_dinfo *dinfo;
int nbr, i;
dinfo = au_cache_alloc_dinfo();
if (unlikely(!dinfo))
goto out;
nbr = au_sbend(sb) + 1;
if (nbr <= 0)
nbr = 1;
dinfo->di_hdentry = kcalloc(nbr, sizeof(*dinfo->di_hdentry), GFP_NOFS);
if (dinfo->di_hdentry) {
au_rw_write_lock_nested(&dinfo->di_rwsem, lsc);
dinfo->di_bstart = -1;
dinfo->di_bend = -1;
dinfo->di_bwh = -1;
dinfo->di_bdiropq = -1;
dinfo->di_tmpfile = 0;
for (i = 0; i < nbr; i++)
dinfo->di_hdentry[i].hd_id = -1;
goto out;
}
au_cache_free_dinfo(dinfo);
dinfo = NULL;
out:
return dinfo;
}
int au_alloc_dinfo(struct dentry *dentry)
{
struct au_dinfo *dinfo;
struct super_block *sb;
int nbr;
dinfo = au_cache_alloc_dinfo();
if (unlikely(!dinfo))
goto out;
sb = dentry->d_sb;
nbr = au_sbend(sb) + 1;
if (nbr <= 0)
nbr = 1;
dinfo->di_hdentry = kcalloc(nbr, sizeof(*dinfo->di_hdentry), GFP_NOFS);
if (unlikely(!dinfo->di_hdentry))
goto out_dinfo;
atomic_set(&dinfo->di_generation, au_sigen(sb));
/* smp_mb(); */ /* atomic_set */
au_rw_init_wlock_nested(&dinfo->di_rwsem, AuLsc_DI_CHILD);
dinfo->di_bstart = -1;
dinfo->di_bend = -1;
dinfo->di_bwh = -1;
dinfo->di_bdiropq = -1;
dentry->d_fsdata = dinfo;
dentry->d_op = &aufs_dop;
return 0; /* success */
out_dinfo:
au_cache_free_dinfo(dinfo);
out:
return -ENOMEM;
}
static void aufs_d_release(struct dentry *dentry)
{
struct au_dinfo *dinfo;
aufs_bindex_t bend, bindex;
dinfo = dentry->d_fsdata;
if (!dinfo)
return;
/* dentry may not be revalidated */
bindex = dinfo->di_bstart;
if (bindex >= 0) {
struct au_hdentry *p;
bend = dinfo->di_bend;
p = dinfo->di_hdentry + bindex;
while (bindex++ <= bend) {
if (p->hd_dentry)
au_hdput(p);
p++;
}
}
kfree(dinfo->di_hdentry);
AuRwDestroy(&dinfo->di_rwsem);
au_cache_free_dinfo(dinfo);
au_hin_di_reinit(dentry);
}
void au_di_free(struct au_dinfo *dinfo)
{
struct au_hdentry *p;
aufs_bindex_t bend, bindex;
/* dentry may not be revalidated */
bindex = dinfo->di_bstart;
if (bindex >= 0) {
bend = dinfo->di_bend;
p = dinfo->di_hdentry + bindex;
while (bindex++ <= bend)
au_hdput(p++);
}
kfree(dinfo->di_hdentry);
au_cache_free_dinfo(dinfo);
}
int au_alloc_dinfo(struct dentry *dentry)
{
struct au_dinfo *dinfo;
struct super_block *sb;
int nbr;
LKTRTrace("%.*s\n", AuDLNPair(dentry));
AuDebugOn(dentry->d_fsdata);
dinfo = au_cache_alloc_dinfo();
if (dinfo) {
sb = dentry->d_sb;
nbr = au_sbend(sb) + 1;
if (nbr <= 0)
nbr = 1;
dinfo->di_hdentry = kcalloc(nbr, sizeof(*dinfo->di_hdentry),
GFP_NOFS);
if (dinfo->di_hdentry) {
au_h_dentry_init_all(dinfo->di_hdentry, nbr);
atomic_set(&dinfo->di_generation, au_sigen(sb));
/* smp_mb(); */ /* atomic_set */
au_rw_init_wlock_nested(&dinfo->di_rwsem,
AuLsc_DI_CHILD);
au_dbg_locked_di_reg(dentry, AuLock_DW, AuLsc_DI_CHILD);
dinfo->di_bstart = -1;
dinfo->di_bend = -1;
dinfo->di_bwh = -1;
dinfo->di_bdiropq = -1;
dentry->d_fsdata = dinfo;
dentry->d_op = &aufs_dop;
return 0; /* success */
}
au_cache_free_dinfo(dinfo);
}
AuTraceErr(-ENOMEM);
return -ENOMEM;
}
