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[PATCH] add a vfs_permission helper

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Most permission() calls have a struct nameidata * available.  This helper
takes that as an argument and thus makes sure we pass it down for lookup
intents and prepares for per-mount read-only support where we need a struct
vfsmount for checking whether a file is writeable.

Signed-off-by: Christoph Hellwig <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Christoph Hellwig 2005-11-08 21:35:04 -08:00 • committed by Linus Torvalds
commit e4543eddfd
7 changed files with 31 additions and 15 deletions
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2
fs/namespace.c
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@ -637,7 +637,7 @@ static int mount_is_safe(struct nameidata *nd)
if (current->uid != nd->dentry->d_inode->i_uid)
return -EPERM;
}
if (permission(nd->dentry->d_inode, MAY_WRITE, nd))
if (vfs_permission(nd, MAY_WRITE))
return -EPERM;
return 0;
#endif