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vfs: add helpers to get root and pwd

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Add three helpers that retrieve a refcounted copy of the root and cwd
from the supplied fs_struct.

 get_fs_root()
 get_fs_pwd()
 get_fs_root_and_pwd()

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Miklos Szeredi 2010-08-10 11:41:36 +02:00 • committed by Al Viro
parent 542ce7a9bc
commit f7ad3c6be9
8 changed files with 49 additions and 62 deletions
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9
kernel/auditsc.c
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@ -1835,13 +1835,8 @@ void __audit_getname(const char *name)
context->names[context->name_count].ino = (unsigned long)-1;
context->names[context->name_count].osid = 0;
++context->name_count;
if (!context->pwd.dentry) {
read_lock(&current->fs->lock);
context->pwd = current->fs->pwd;
path_get(&current->fs->pwd);
read_unlock(&current->fs->lock);
}
if (!context->pwd.dentry)
get_fs_pwd(current->fs, &context->pwd);
}
/* audit_putname - intercept a putname request