*
* GPL HEADER END
*/
-#ifdef __KERNEL__
+/*
+ * Copyright (c) 2014, 2017, Intel Corporation.
+ */
#define DEBUG_SUBSYSTEM S_FILTER
-#include <linux/version.h>
#include <linux/fs.h>
-#include <asm/unistd.h>
-#include <linux/slab.h>
-#include <linux/pagemap.h>
-#include <linux/quotaops.h>
-#include <linux/version.h>
#include <libcfs/libcfs.h>
-#include <obd.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/lustre_compat25.h>
#include <lvfs.h>
+#include <obd_class.h>
-#include <obd.h>
-#include <lustre_lib.h>
+#include "ptlrpc_internal.h"
/* refine later and change to seqlock or simlar from libcfs */
/* 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()),\
+# define ASSERT_NOT_KERNEL_CTXT(msg) LASSERTF(!segment_eq(get_fs(), KERNEL_DS),\
msg)
-# define ASSERT_KERNEL_CTXT(msg) LASSERTF(segment_eq(get_fs(), get_ds()), msg)
+# define ASSERT_KERNEL_CTXT(msg) LASSERTF(segment_eq(get_fs(), KERNEL_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 void push_group_info(struct lvfs_run_ctxt *save,
- struct group_info *ginfo)
+static inline void ll_set_fs_pwd(struct fs_struct *fs, struct vfsmount *mnt,
+ struct dentry *dentry)
{
- if (!ginfo) {
- save->ngroups = current_ngroups;
- current_ngroups = 0;
- } else {
- struct cred *cred;
- task_lock(current);
- save->group_info = current_cred()->group_info;
- if ((cred = prepare_creds())) {
- cred->group_info = ginfo;
- commit_creds(cred);
- }
- task_unlock(current);
- }
-}
-
-static void pop_group_info(struct lvfs_run_ctxt *save,
- struct group_info *ginfo)
-{
- if (!ginfo) {
- current_ngroups = save->ngroups;
- } else {
- struct cred *cred;
- task_lock(current);
- if ((cred = prepare_creds())) {
- cred->group_info = save->group_info;
- commit_creds(cred);
- }
- task_unlock(current);
- }
+ 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,
- struct lvfs_ucred *uc)
+void push_ctxt(struct lvfs_run_ctxt *save, struct lvfs_run_ctxt *new_ctx)
{
/* if there is underlaying dt_device then push_ctxt is not needed */
if (new_ctx->dt != NULL)
OBD_SET_CTXT_MAGIC(save);
save->fs = get_fs();
- LASSERT(d_refcount(current->fs->pwd.dentry));
- LASSERT(d_refcount(new_ctx->pwd));
+ LASSERT(ll_d_count(current->fs->pwd.dentry));
+ LASSERT(ll_d_count(new_ctx->pwd));
save->pwd = dget(current->fs->pwd.dentry);
save->pwdmnt = mntget(current->fs->pwd.mnt);
- save->luc.luc_umask = current_umask();
- save->ngroups = current_cred()->group_info->ngroups;
+ save->umask = current_umask();
LASSERT(save->pwd);
LASSERT(save->pwdmnt);
LASSERT(new_ctx->pwd);
LASSERT(new_ctx->pwdmnt);
- if (uc) {
- struct cred *cred;
- save->luc.luc_uid = current_uid();
- save->luc.luc_gid = current_gid();
- save->luc.luc_fsuid = current_fsuid();
- save->luc.luc_fsgid = current_fsgid();
- save->luc.luc_cap = current_cap();
-
- if ((cred = prepare_creds())) {
- cred->uid = uc->luc_uid;
- cred->gid = uc->luc_gid;
- cred->fsuid = uc->luc_fsuid;
- cred->fsgid = uc->luc_fsgid;
- cred->cap_effective = uc->luc_cap;
- commit_creds(cred);
- }
-
- push_group_info(save,
- uc->luc_ginfo ?:
- uc->luc_identity ? uc->luc_identity->mi_ginfo :
- NULL);
- }
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);
-void pop_ctxt(struct lvfs_run_ctxt *saved, struct lvfs_run_ctxt *new_ctx,
- struct lvfs_ucred *uc)
+void pop_ctxt(struct lvfs_run_ctxt *saved, struct lvfs_run_ctxt *new_ctx)
{
/* if there is underlaying dt_device then pop_ctxt is not needed */
if (new_ctx->dt != NULL)
dput(saved->pwd);
mntput(saved->pwdmnt);
- current->fs->umask = saved->luc.luc_umask;
- if (uc) {
- struct cred *cred;
- if ((cred = prepare_creds())) {
- cred->uid = saved->luc.luc_uid;
- cred->gid = saved->luc.luc_gid;
- cred->fsuid = saved->luc.luc_fsuid;
- cred->fsgid = saved->luc.luc_fsgid;
- cred->cap_effective = saved->luc.luc_cap;
- commit_creds(cred);
- }
-
- pop_group_info(saved,
- uc->luc_ginfo ?:
- uc->luc_identity ? uc->luc_identity->mi_ginfo :
- NULL);
- }
+ 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 = vfs_rename(dir->d_inode, dchild_old, dir->d_inode, dchild_new);
-
- dput(dchild_new);
-put_old:
- dput(dchild_old);
- RETURN(err);
-}
-EXPORT_SYMBOL(lustre_rename);
-#endif /* __KERNEL__ */
git://git.whamcloud.com / fs / lustre-release.git / blobdiff