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split ->file_mmap() into ->mmap_addr()/->mmap_file()

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... i.e. file-dependent and address-dependent checks.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2012-05-30 13:30:51 -04:00
parent d007794a18
commit e5467859f7
11 changed files with 64 additions and 78 deletions
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15
security/smack/smack_lsm.c
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@@ -1171,7 +1171,7 @@ static int smack_file_fcntl(struct file *file, unsigned int cmd,
}
/**
* smack_file_mmap :
* smack_mmap_file :
* Check permissions for a mmap operation. The @file may be NULL, e.g.
* if mapping anonymous memory.
* @file contains the file structure for file to map (may be NULL).
@@ -1180,10 +1180,9 @@ static int smack_file_fcntl(struct file *file, unsigned int cmd,
* @flags contains the operational flags.
* Return 0 if permission is granted.
*/
static int smack_file_mmap(struct file *file,
static int smack_mmap_file(struct file *file,
unsigned long reqprot, unsigned long prot,
unsigned long flags, unsigned long addr,
unsigned long addr_only)
unsigned long flags)
{
struct smack_known *skp;
struct smack_rule *srp;
@@ -1198,11 +1197,6 @@ static int smack_file_mmap(struct file *file,
int tmay;
int rc;
/* do DAC check on address space usage */
rc = cap_mmap_addr(addr);
if (rc || addr_only)
return rc;
if (file == NULL || file->f_dentry == NULL)
return 0;
@@ -3482,7 +3476,8 @@ struct security_operations smack_ops = {
.file_ioctl = smack_file_ioctl,
.file_lock = smack_file_lock,
.file_fcntl = smack_file_fcntl,
.file_mmap = smack_file_mmap,
.mmap_file = smack_mmap_file,
.mmap_addr = cap_mmap_addr,
.file_set_fowner = smack_file_set_fowner,
.file_send_sigiotask = smack_file_send_sigiotask,
.file_receive = smack_file_receive,