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fs: provide rcu-walk aware permission i_ops

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Signed-off-by: Nick Piggin <npiggin@kernel.dk>
This commit is contained in:
Nick Piggin
2011-01-07 17:49:58 +11:00
parent 34286d6662
commit b74c79e993
60 changed files with 287 additions and 146 deletions
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6
fs/proc/base.c
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@@ -2114,11 +2114,13 @@ static const struct file_operations proc_fd_operations = {
* /proc/pid/fd needs a special permission handler so that a process can still
* access /proc/self/fd after it has executed a setuid().
*/
static int proc_fd_permission(struct inode *inode, int mask)
static int proc_fd_permission(struct inode *inode, int mask, unsigned int flags)
{
int rv;
rv = generic_permission(inode, mask, NULL);
if (flags & IPERM_FLAG_RCU)
return -ECHILD;
rv = generic_permission(inode, mask, flags, NULL);
if (rv == 0)
return 0;
if (task_pid(current) == proc_pid(inode))

5
fs/proc/proc_sysctl.c
View File

@@ -295,7 +295,7 @@ out:
return ret;
}
static int proc_sys_permission(struct inode *inode, int mask)
static int proc_sys_permission(struct inode *inode, int mask,unsigned int flags)
{
/*
* sysctl entries that are not writeable,
@@ -305,6 +305,9 @@ static int proc_sys_permission(struct inode *inode, int mask)
struct ctl_table *table;
int error;
if (flags & IPERM_FLAG_RCU)
return -ECHILD;
/* Executable files are not allowed under /proc/sys/ */
if ((mask & MAY_EXEC) && S_ISREG(inode->i_mode))
return -EACCES;