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authorMimi Zohar <zohar@linux.vnet.ibm.com>2010-11-02 10:10:56 -0400
committerMimi Zohar <zohar@linux.vnet.ibm.com>2011-02-10 07:51:43 -0500
commita68a27b6f2354273bacc39c3dd06456edb202230 (patch)
treed73396dab134842ecd1e86d665718e75012e7e78 /security
parent75a25637bf8a1b8fbed2368c0a3ec15c66a534f1 (diff)
IMA: convert i_readcount to atomic
Convert the inode's i_readcount from an unsigned int to atomic. Signed-off-by: Mimi Zohar <zohar@us.ibm.com> Acked-by: Eric Paris <eparis@redhat.com>
Diffstat (limited to 'security')
-rw-r--r--security/integrity/ima/ima_iint.c7
-rw-r--r--security/integrity/ima/ima_main.c11
2 files changed, 10 insertions, 8 deletions
diff --git a/security/integrity/ima/ima_iint.c b/security/integrity/ima/ima_iint.c
index c442e47b6785..f0053552fd58 100644
--- a/security/integrity/ima/ima_iint.c
+++ b/security/integrity/ima/ima_iint.c
@@ -137,10 +137,11 @@ void ima_inode_free(struct inode *inode)
{
struct ima_iint_cache *iint;
- if (inode->i_readcount)
- printk(KERN_INFO "%s: readcount: %u\n", __func__, inode->i_readcount);
+ if (atomic_read(&inode->i_readcount))
+ printk(KERN_INFO "%s: readcount: %u\n", __func__,
+ atomic_read(&inode->i_readcount));
- inode->i_readcount = 0;
+ atomic_set(&inode->i_readcount, 0);
if (!IS_IMA(inode))
return;
diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c
index 203de979d305..6e8cb931b8f1 100644
--- a/security/integrity/ima/ima_main.c
+++ b/security/integrity/ima/ima_main.c
@@ -113,7 +113,7 @@ void ima_counts_get(struct file *file)
goto out;
if (mode & FMODE_WRITE) {
- if (inode->i_readcount && IS_IMA(inode))
+ if (atomic_read(&inode->i_readcount) && IS_IMA(inode))
send_tomtou = true;
goto out;
}
@@ -127,7 +127,7 @@ void ima_counts_get(struct file *file)
out:
/* remember the vfs deals with i_writecount */
if ((mode & (FMODE_READ | FMODE_WRITE)) == FMODE_READ)
- inode->i_readcount++;
+ atomic_inc(&inode->i_readcount);
spin_unlock(&inode->i_lock);
@@ -149,15 +149,16 @@ static void ima_dec_counts(struct inode *inode, struct file *file)
assert_spin_locked(&inode->i_lock);
if ((mode & (FMODE_READ | FMODE_WRITE)) == FMODE_READ) {
- if (unlikely(inode->i_readcount == 0)) {
+ if (unlikely(atomic_read(&inode->i_readcount) == 0)) {
if (!ima_limit_imbalance(file)) {
printk(KERN_INFO "%s: open/free imbalance (r:%u)\n",
- __func__, inode->i_readcount);
+ __func__,
+ atomic_read(&inode->i_readcount));
dump_stack();
}
return;
}
- inode->i_readcount--;
+ atomic_dec(&inode->i_readcount);
}
}

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