/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=8:tabstop=8:
*
- * lustre/lib/fsfilt_ext3.c
+ * lustre/lib/lvfs_linux.c
* Lustre filesystem abstraction routines
*
* Copyright (C) 2002, 2003 Cluster File Systems, Inc.
#include <linux/version.h>
#include <linux/fs.h>
#include <asm/unistd.h>
-#include <linux/jbd.h>
#include <linux/slab.h>
#include <linux/pagemap.h>
#include <linux/quotaops.h>
#include <linux/obd.h>
#include <linux/lustre_lib.h>
+#include <linux/lustre_mds.h> /* for mds_grp_hash_entry */
atomic_t obd_memory;
int obd_memmax;
/* 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) LASSERT(!segment_eq(get_fs(), get_ds()))
-# define ASSERT_KERNEL_CTXT(msg) LASSERT(segment_eq(get_fs(), get_ds()))
+# 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
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0))
-#define current_ngroups current->group_info->ngroups
-#define current_groups current->group_info->small_block
+static void push_group_info(struct lvfs_run_ctxt *save,
+ struct group_info *ginfo)
+{
+ if (!ginfo) {
+ save->ngroups = current_ngroups;
+ current_ngroups = 0;
+ } else {
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,4)
+ task_lock(current);
+ save->group_info = current->group_info;
+ current->group_info = ginfo;
+ task_unlock(current);
+#else
+ LASSERT(ginfo->ngroups <= NGROUPS);
+ /* save old */
+ save->group_info.ngroups = current->ngroups;
+ if (current->ngroups)
+ memcpy(save->group_info.small_block, current->groups,
+ current->ngroups);
+ /* push new */
+ current->ngroups = ginfo->ngroups;
+ if (ginfo->ngroups)
+ memcpy(current->groups, ginfo->small_block,
+ current->ngroups);
+#endif
+ }
+}
+
+static void pop_group_info(struct lvfs_run_ctxt *save,
+ struct group_info *ginfo)
+{
+ if (!ginfo) {
+ current_ngroups = save->ngroups;
+ } else {
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,4)
+ task_lock(current);
+ current->group_info = save->group_info;
+ task_unlock(current);
#else
-#define current_ngroups current->ngroups
-#define current_groups current->groups
+ current->ngroups = ginfo->ngroups;
+ if (current->ngroups)
+ memcpy(current->groups, save->group_info.small_block,
+ current->ngroups);
#endif
+ }
+}
/* push / pop to root of obd store */
-void push_ctxt(struct obd_run_ctxt *save, struct obd_run_ctxt *new_ctx,
- struct obd_ucred *uc)
+void push_ctxt(struct lvfs_run_ctxt *save, struct lvfs_run_ctxt *new_ctx,
+ struct lvfs_ucred *uc)
{
//ASSERT_NOT_KERNEL_CTXT("already in kernel context!\n");
ASSERT_CTXT_MAGIC(new_ctx->magic);
+ LASSERT(save->magic != OBD_RUN_CTXT_MAGIC || save->pid != current->pid);
OBD_SET_CTXT_MAGIC(save);
+ save->pid = current->pid;
/*
CDEBUG(D_INFO,
save->pwd = dget(current->fs->pwd);
save->pwdmnt = mntget(current->fs->pwdmnt);
save->ngroups = current_ngroups;
+ save->luc.luc_umask = current->fs->umask;
LASSERT(save->pwd);
LASSERT(save->pwdmnt);
LASSERT(new_ctx->pwdmnt);
if (uc) {
- save->ouc.ouc_fsuid = current->fsuid;
- save->ouc.ouc_fsgid = current->fsgid;
- save->ouc.ouc_cap = current->cap_effective;
- save->ouc.ouc_suppgid1 = current_groups[0];
- save->ouc.ouc_suppgid2 = current_groups[1];
-
- current->fsuid = uc->ouc_fsuid;
- current->fsgid = uc->ouc_fsgid;
- current->cap_effective = uc->ouc_cap;
- current_ngroups = 0;
+ save->luc.luc_fsuid = current->fsuid;
+ save->luc.luc_fsgid = current->fsgid;
+ save->luc.luc_cap = current->cap_effective;
+
+ current->fsuid = uc->luc_fsuid;
+ current->fsgid = uc->luc_fsgid;
+ current->cap_effective = uc->luc_cap;
- if (uc->ouc_suppgid1 != -1)
- current_groups[current_ngroups++] = uc->ouc_suppgid1;
- if (uc->ouc_suppgid2 != -1)
- current_groups[current_ngroups++] = uc->ouc_suppgid2;
+ push_group_info(save, uc->luc_ginfo);
}
+ current->fs->umask = 0; /* umask already applied on client */
set_fs(new_ctx->fs);
set_fs_pwd(current->fs, new_ctx->pwdmnt, new_ctx->pwd);
}
EXPORT_SYMBOL(push_ctxt);
-void pop_ctxt(struct obd_run_ctxt *saved, struct obd_run_ctxt *new_ctx,
- struct obd_ucred *uc)
+void pop_ctxt(struct lvfs_run_ctxt *saved, struct lvfs_run_ctxt *new_ctx,
+ struct lvfs_ucred *uc)
{
//printk("pc0");
ASSERT_CTXT_MAGIC(saved->magic);
+ LASSERT(saved->pid == current->pid);
+ saved->magic = 0;
+ saved->pid = 0;
//printk("pc1");
ASSERT_KERNEL_CTXT("popping non-kernel context!\n");
dput(saved->pwd);
mntput(saved->pwdmnt);
+ current->fs->umask = saved->luc.luc_umask;
if (uc) {
- current->fsuid = saved->ouc.ouc_fsuid;
- current->fsgid = saved->ouc.ouc_fsgid;
- current->cap_effective = saved->ouc.ouc_cap;
- current_ngroups = saved->ngroups;
- current_groups[0] = saved->ouc.ouc_suppgid1;
- current_groups[1] = saved->ouc.ouc_suppgid2;
+ current->fsuid = saved->luc.luc_fsuid;
+ current->fsgid = saved->luc.luc_fsgid;
+ current->cap_effective = saved->luc.luc_cap;
+
+ pop_group_info(saved, uc->luc_ginfo);
}
/*
}
EXPORT_SYMBOL(lustre_fsync);
-struct l_file *l_dentry_open(struct obd_run_ctxt *ctxt, struct l_dentry *de,
+struct l_file *l_dentry_open(struct lvfs_run_ctxt *ctxt, struct l_dentry *de,
int flags)
{
mntget(ctxt->pwdmnt);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff