Linux 3.14

[~andy/linux] / fs / xattr.c

diff --git a/fs/xattr.c b/fs/xattr.c
index c5e90d2d751fb6fa50200bd98ac2fdbcb26df89e..3377dff184042044547d42e9b123944a0ad7e96a 100644 (file)
--- a/fs/xattr.c
+++ b/fs/xattr.c
@@ -394,8 +394,9 @@ SYSCALL_DEFINE5(lsetxattr, const char __user *, pathname,
 {
        struct path path;
        int error;
-
-       error = user_lpath(pathname, &path);
+       unsigned int lookup_flags = 0;
+retry:
+       error = user_path_at(AT_FDCWD, pathname, lookup_flags, &path);
        if (error)
                return error;
        error = mnt_want_write(path.mnt);
@@ -404,6 +405,10 @@ SYSCALL_DEFINE5(lsetxattr, const char __user *, pathname,
                mnt_drop_write(path.mnt);
        }
        path_put(&path);
+       if (retry_estale(error, lookup_flags)) {
+               lookup_flags |= LOOKUP_REVAL;
+               goto retry;
+       }
        return error;
 }
 
@@ -481,12 +486,17 @@ SYSCALL_DEFINE4(getxattr, const char __user *, pathname,
 {
        struct path path;
        ssize_t error;
-
-       error = user_path(pathname, &path);
+       unsigned int lookup_flags = LOOKUP_FOLLOW;
+retry:
+       error = user_path_at(AT_FDCWD, pathname, lookup_flags, &path);
        if (error)
                return error;
        error = getxattr(path.dentry, name, value, size);
        path_put(&path);
+       if (retry_estale(error, lookup_flags)) {
+               lookup_flags |= LOOKUP_REVAL;
+               goto retry;
+       }
        return error;
 }
 
@@ -495,12 +505,17 @@ SYSCALL_DEFINE4(lgetxattr, const char __user *, pathname,
 {
        struct path path;
        ssize_t error;
-
-       error = user_lpath(pathname, &path);
+       unsigned int lookup_flags = 0;
+retry:
+       error = user_path_at(AT_FDCWD, pathname, lookup_flags, &path);
        if (error)
                return error;
        error = getxattr(path.dentry, name, value, size);
        path_put(&path);
+       if (retry_estale(error, lookup_flags)) {
+               lookup_flags |= LOOKUP_REVAL;
+               goto retry;
+       }
        return error;
 }
 
@@ -561,12 +576,17 @@ SYSCALL_DEFINE3(listxattr, const char __user *, pathname, char __user *, list,
 {
        struct path path;
        ssize_t error;
-
-       error = user_path(pathname, &path);
+       unsigned int lookup_flags = LOOKUP_FOLLOW;
+retry:
+       error = user_path_at(AT_FDCWD, pathname, lookup_flags, &path);
        if (error)
                return error;
        error = listxattr(path.dentry, list, size);
        path_put(&path);
+       if (retry_estale(error, lookup_flags)) {
+               lookup_flags |= LOOKUP_REVAL;
+               goto retry;
+       }
        return error;
 }
 
@@ -575,12 +595,17 @@ SYSCALL_DEFINE3(llistxattr, const char __user *, pathname, char __user *, list,
 {
        struct path path;
        ssize_t error;
-
-       error = user_lpath(pathname, &path);
+       unsigned int lookup_flags = 0;
+retry:
+       error = user_path_at(AT_FDCWD, pathname, lookup_flags, &path);
        if (error)
                return error;
        error = listxattr(path.dentry, list, size);
        path_put(&path);
+       if (retry_estale(error, lookup_flags)) {
+               lookup_flags |= LOOKUP_REVAL;
+               goto retry;
+       }
        return error;
 }
 
@@ -620,8 +645,9 @@ SYSCALL_DEFINE2(removexattr, const char __user *, pathname,
 {
        struct path path;
        int error;
-
-       error = user_path(pathname, &path);
+       unsigned int lookup_flags = LOOKUP_FOLLOW;
+retry:
+       error = user_path_at(AT_FDCWD, pathname, lookup_flags, &path);
        if (error)
                return error;
        error = mnt_want_write(path.mnt);
@@ -630,6 +656,10 @@ SYSCALL_DEFINE2(removexattr, const char __user *, pathname,
                mnt_drop_write(path.mnt);
        }
        path_put(&path);
+       if (retry_estale(error, lookup_flags)) {
+               lookup_flags |= LOOKUP_REVAL;
+               goto retry;
+       }
        return error;
 }
 
@@ -638,8 +668,9 @@ SYSCALL_DEFINE2(lremovexattr, const char __user *, pathname,
 {
        struct path path;
        int error;
-
-       error = user_lpath(pathname, &path);
+       unsigned int lookup_flags = 0;
+retry:
+       error = user_path_at(AT_FDCWD, pathname, lookup_flags, &path);
        if (error)
                return error;
        error = mnt_want_write(path.mnt);
@@ -648,6 +679,10 @@ SYSCALL_DEFINE2(lremovexattr, const char __user *, pathname,
                mnt_drop_write(path.mnt);
        }
        path_put(&path);
+       if (retry_estale(error, lookup_flags)) {
+               lookup_flags |= LOOKUP_REVAL;
+               goto retry;
+       }
        return error;
 }