* GPL HEADER END
*/
/*
- * Copyright (c) 2014, Intel Corporation.
+ * Copyright (c) 2014, 2017, Intel Corporation.
*/
#define DEBUG_SUBSYSTEM S_FILTER
#include <linux/fs.h>
+#include <linux/fs_struct.h>
#include <libcfs/libcfs.h>
#include <lvfs.h>
#include <obd_class.h>
/* Debugging check only needed during development */
#ifdef OBD_CTXT_DEBUG
# define ASSERT_CTXT_MAGIC(magic) LASSERT((magic) == OBD_RUN_CTXT_MAGIC)
-# define ASSERT_NOT_KERNEL_CTXT(msg) LASSERTF(!segment_eq(get_fs(), get_ds()),\
- msg)
-# define ASSERT_KERNEL_CTXT(msg) LASSERTF(segment_eq(get_fs(), get_ds()), msg)
#else
# define ASSERT_CTXT_MAGIC(magic) do {} while(0)
-# define ASSERT_NOT_KERNEL_CTXT(msg) do {} while(0)
-# define ASSERT_KERNEL_CTXT(msg) do {} while(0)
#endif
+static inline void ll_set_fs_pwd(struct fs_struct *fs, struct vfsmount *mnt,
+ struct dentry *dentry)
+{
+ struct path path;
+ struct path old_pwd;
+
+ path.mnt = mnt;
+ path.dentry = dentry;
+ path_get(&path);
+ spin_lock(&fs->lock);
+ write_seqcount_begin(&fs->seq);
+ old_pwd = fs->pwd;
+ fs->pwd = path;
+ write_seqcount_end(&fs->seq);
+ spin_unlock(&fs->lock);
+
+ if (old_pwd.dentry)
+ path_put(&old_pwd);
+}
+
/* push / pop to root of obd store */
void push_ctxt(struct lvfs_run_ctxt *save, struct lvfs_run_ctxt *new_ctx)
{
if (new_ctx->dt != NULL)
return;
- //ASSERT_NOT_KERNEL_CTXT("already in kernel context!\n");
ASSERT_CTXT_MAGIC(new_ctx->magic);
OBD_SET_CTXT_MAGIC(save);
- save->fs = get_fs();
LASSERT(ll_d_count(current->fs->pwd.dentry));
LASSERT(ll_d_count(new_ctx->pwd));
save->pwd = dget(current->fs->pwd.dentry);
LASSERT(new_ctx->pwdmnt);
current->fs->umask = 0; /* umask already applied on client */
- set_fs(new_ctx->fs);
ll_set_fs_pwd(current->fs, new_ctx->pwdmnt, new_ctx->pwd);
}
EXPORT_SYMBOL(push_ctxt);
return;
ASSERT_CTXT_MAGIC(saved->magic);
- ASSERT_KERNEL_CTXT("popping non-kernel context!\n");
- LASSERTF(current->fs->pwd.dentry == new_ctx->pwd, "%p != %p\n",
+ LASSERTF(current->fs->pwd.dentry == new_ctx->pwd, "%px != %px\n",
current->fs->pwd.dentry, new_ctx->pwd);
- LASSERTF(current->fs->pwd.mnt == new_ctx->pwdmnt, "%p != %p\n",
+ LASSERTF(current->fs->pwd.mnt == new_ctx->pwdmnt, "%px != %px\n",
current->fs->pwd.mnt, new_ctx->pwdmnt);
- set_fs(saved->fs);
ll_set_fs_pwd(current->fs, saved->pwdmnt, saved->pwd);
dput(saved->pwd);
current->fs->umask = saved->umask;
}
EXPORT_SYMBOL(pop_ctxt);
-
-/* utility to rename a file */
-int lustre_rename(struct dentry *dir, struct vfsmount *mnt,
- char *oldname, char *newname)
-{
- struct dentry *dchild_old, *dchild_new;
- int err = 0;
- ENTRY;
-
- ASSERT_KERNEL_CTXT("kernel doing rename outside kernel context\n");
- CDEBUG(D_INODE, "renaming file %.*s to %.*s\n",
- (int)strlen(oldname), oldname, (int)strlen(newname), newname);
-
- dchild_old = ll_lookup_one_len(oldname, dir, strlen(oldname));
- if (IS_ERR(dchild_old))
- RETURN(PTR_ERR(dchild_old));
-
- if (!dchild_old->d_inode)
- GOTO(put_old, err = -ENOENT);
-
- dchild_new = ll_lookup_one_len(newname, dir, strlen(newname));
- if (IS_ERR(dchild_new))
- GOTO(put_old, err = PTR_ERR(dchild_new));
-
- err = ll_vfs_rename(dir->d_inode, dchild_old, dir->d_inode, dchild_new);
-
- dput(dchild_new);
-put_old:
- dput(dchild_old);
- RETURN(err);
-}