projects
/
firefly-linux-kernel-4.4.55.git
/ blobdiff
commit
grep
author
committer
pickaxe
?
search:
re
summary
|
shortlog
|
log
|
commit
|
commitdiff
|
tree
raw
|
inline
| side by side
ext4: fix data corruption caused by unwritten and delayed extents
[firefly-linux-kernel-4.4.55.git]
/
fs
/
xattr.c
diff --git
a/fs/xattr.c
b/fs/xattr.c
index c127d57bf655e1de05d39ede2739dba47f2338c3..3377dff184042044547d42e9b123944a0ad7e96a 100644
(file)
--- a/
fs/xattr.c
+++ b/
fs/xattr.c
@@
-576,12
+576,17
@@
SYSCALL_DEFINE3(listxattr, const char __user *, pathname, char __user *, list,
{
struct path path;
ssize_t error;
{
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 (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;
}
return error;
}
@@
-590,12
+595,17
@@
SYSCALL_DEFINE3(llistxattr, const char __user *, pathname, char __user *, list,
{
struct path path;
ssize_t error;
{
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 (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;
}
return error;
}
@@
-635,8
+645,9
@@
SYSCALL_DEFINE2(removexattr, const char __user *, pathname,
{
struct path path;
int error;
{
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);
if (error)
return error;
error = mnt_want_write(path.mnt);
@@
-645,6
+656,10
@@
SYSCALL_DEFINE2(removexattr, const char __user *, pathname,
mnt_drop_write(path.mnt);
}
path_put(&path);
mnt_drop_write(path.mnt);
}
path_put(&path);
+ if (retry_estale(error, lookup_flags)) {
+ lookup_flags |= LOOKUP_REVAL;
+ goto retry;
+ }
return error;
}
return error;
}
@@
-653,8
+668,9
@@
SYSCALL_DEFINE2(lremovexattr, const char __user *, pathname,
{
struct path path;
int error;
{
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);
if (error)
return error;
error = mnt_want_write(path.mnt);
@@
-663,6
+679,10
@@
SYSCALL_DEFINE2(lremovexattr, const char __user *, pathname,
mnt_drop_write(path.mnt);
}
path_put(&path);
mnt_drop_write(path.mnt);
}
path_put(&path);
+ if (retry_estale(error, lookup_flags)) {
+ lookup_flags |= LOOKUP_REVAL;
+ goto retry;
+ }
return error;
}
return error;
}