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authorMiklos Szeredi <mszeredi@suse.cz>2008-06-23 18:11:53 +0200
committerAl Viro <viro@zeniv.linux.org.uk>2008-06-23 13:07:00 -0400
commitcdd16d0265c9234228fd37fbbad844d7e894b278 (patch)
treeba9ec59f49465c1a31143be0927106ef16de12df
parent31f3e0b3a18c6d48196c40a82a3b8c01f4ff6b23 (diff)
[patch 2/3] vfs: dcache cleanups
Comment from Al Viro: add prepend_name() wrapper. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
-rw-r--r--fs/dcache.c31
1 files changed, 14 insertions, 17 deletions
diff --git a/fs/dcache.c b/fs/dcache.c
index e4b2b9436b3..6068c25b393 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -1747,8 +1747,7 @@ shouldnt_be_hashed:
BUG();
}
-static int prepend(char **buffer, int *buflen, const char *str,
- int namelen)
+static int prepend(char **buffer, int *buflen, const char *str, int namelen)
{
*buflen -= namelen;
if (*buflen < 0)
@@ -1758,6 +1757,11 @@ static int prepend(char **buffer, int *buflen, const char *str,
return 0;
}
+static int prepend_name(char **buffer, int *buflen, struct qstr *name)
+{
+ return prepend(buffer, buflen, name->name, name->len);
+}
+
/**
* __d_path - return the path of a dentry
* @path: the dentry/vfsmount to report
@@ -1780,8 +1784,8 @@ char *__d_path(const struct path *path, struct path *root,
{
struct dentry *dentry = path->dentry;
struct vfsmount *vfsmnt = path->mnt;
- char * end = buffer+buflen;
- char * retval;
+ char *end = buffer + buflen;
+ char *retval;
spin_lock(&vfsmount_lock);
prepend(&end, &buflen, "\0", 1);
@@ -1811,8 +1815,7 @@ char *__d_path(const struct path *path, struct path *root,
}
parent = dentry->d_parent;
prefetch(parent);
- if ((prepend(&end, &buflen, dentry->d_name.name,
- dentry->d_name.len) != 0) ||
+ if ((prepend_name(&end, &buflen, &dentry->d_name) != 0) ||
(prepend(&end, &buflen, "/", 1) != 0))
goto Elong;
retval = end;
@@ -1825,8 +1828,7 @@ out:
global_root:
retval += 1; /* hit the slash */
- if (prepend(&retval, &buflen, dentry->d_name.name,
- dentry->d_name.len) != 0)
+ if (prepend_name(&retval, &buflen, &dentry->d_name) != 0)
goto Elong;
root->mnt = vfsmnt;
root->dentry = dentry;
@@ -1918,16 +1920,11 @@ char *dentry_path(struct dentry *dentry, char *buf, int buflen)
retval = end-1;
*retval = '/';
- for (;;) {
- struct dentry *parent;
- if (IS_ROOT(dentry))
- break;
+ while (!IS_ROOT(dentry)) {
+ struct dentry *parent = dentry->d_parent;
- parent = dentry->d_parent;
prefetch(parent);
-
- if ((prepend(&end, &buflen, dentry->d_name.name,
- dentry->d_name.len) != 0) ||
+ if ((prepend_name(&end, &buflen, &dentry->d_name) != 0) ||
(prepend(&end, &buflen, "/", 1) != 0))
goto Elong;
@@ -1978,7 +1975,7 @@ asmlinkage long sys_getcwd(char __user *buf, unsigned long size)
error = -ENOENT;
/* Has the current directory has been unlinked? */
spin_lock(&dcache_lock);
- if (pwd.dentry->d_parent == pwd.dentry || !d_unhashed(pwd.dentry)) {
+ if (IS_ROOT(pwd.dentry) || !d_unhashed(pwd.dentry)) {
unsigned long len;
struct path tmp = root;
char * cwd;