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| author | Prasanna Meda <pmeda@akamai.com> | 2005-04-29 16:00:17 +0100 |
|---|---|---|
| committer | <dwmw2@shinybook.infradead.org> | 2005-04-29 16:00:17 +0100 |
| commit | ea3834d9fb348fb1144ad3affea22df933eaf62e (patch) | |
| tree | ae1df66df596e9ae2ad808a26772f17d0c0f8262 | |
| parent | 81b7854d52d35ed2353dd47033ae630d18322a2d (diff) | |
| download | lwn-ea3834d9fb348fb1144ad3affea22df933eaf62e.tar.gz lwn-ea3834d9fb348fb1144ad3affea22df933eaf62e.zip | |
namei: add audit_inode to all branches in path_lookup
Main change is in path_lookup: added a goto to do audit_inode
instead of return statement, when emul_lookup_dentry for root
is successful.The existing code does audit_inode only when
lookup is done in normal root or cwd.
Other changes: Some lookup routines are returning zero on success,
and some are returning zero on failure. I documented the related
function signatures in this code path, so that one can glance over
abstract functions without understanding the entire code.
Signed-off-by: Prasanna Meda <pmeda@akamai.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
| -rw-r--r-- | fs/namei.c | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/fs/namei.c b/fs/namei.c index 9e4aef2a1a21..0f76fd75591b 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -686,11 +686,11 @@ fail: /* * Name resolution. + * This is the basic name resolution function, turning a pathname into + * the final dentry. We expect 'base' to be positive and a directory. * - * This is the basic name resolution function, turning a pathname - * into the final dentry. - * - * We expect 'base' to be positive and a directory. + * Returns 0 and nd will have valid dentry and mnt on success. + * Returns error and drops reference to input namei data on failure. */ static fastcall int __link_path_walk(const char * name, struct nameidata *nd) { @@ -929,8 +929,10 @@ int fastcall path_walk(const char * name, struct nameidata *nd) return link_path_walk(name, nd); } -/* SMP-safe */ -/* returns 1 if everything is done */ +/* + * SMP-safe: Returns 1 and nd will have valid dentry and mnt, if + * everything is done. Returns 0 and drops input nd, if lookup failed; + */ static int __emul_lookup_dentry(const char *name, struct nameidata *nd) { if (path_walk(name, nd)) @@ -994,9 +996,10 @@ set_it: } } +/* Returns 0 and nd will be valid on success; Retuns error, otherwise. */ int fastcall path_lookup(const char *name, unsigned int flags, struct nameidata *nd) { - int retval; + int retval = 0; nd->last_type = LAST_ROOT; /* if there are only slashes... */ nd->flags = flags; @@ -1009,7 +1012,7 @@ int fastcall path_lookup(const char *name, unsigned int flags, struct nameidata nd->dentry = dget(current->fs->altroot); read_unlock(¤t->fs->lock); if (__emul_lookup_dentry(name,nd)) - return 0; + goto out; /* found in altroot */ read_lock(¤t->fs->lock); } nd->mnt = mntget(current->fs->rootmnt); @@ -1021,6 +1024,7 @@ int fastcall path_lookup(const char *name, unsigned int flags, struct nameidata read_unlock(¤t->fs->lock); current->total_link_count = 0; retval = link_path_walk(name, nd); +out: if (unlikely(current->audit_context && nd && nd->dentry && nd->dentry->d_inode)) audit_inode(name, nd->dentry->d_inode); |