* Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
- * Copyright (c) 2011, 2012, Whamcloud, Inc.
+ * Copyright (c) 2011, 2012, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
#include <linux/init.h>
#include <linux/lustre_compat25.h>
#include <lvfs.h>
-#include "lvfs_internal.h"
#include <obd.h>
#include <lustre_lib.h>
}
EXPORT_SYMBOL(pop_ctxt);
-/* utility to make a file */
-struct dentry *simple_mknod(struct dentry *dir, char *name, int mode, int fix)
-{
- struct dentry *dchild;
- int err = 0;
- ENTRY;
-
- // ASSERT_KERNEL_CTXT("kernel doing mknod outside kernel context\n");
- CDEBUG(D_INODE, "creating file %.*s\n", (int)strlen(name), name);
-
- dchild = ll_lookup_one_len(name, dir, strlen(name));
- if (IS_ERR(dchild))
- GOTO(out_up, dchild);
-
- if (dchild->d_inode) {
- int old_mode = dchild->d_inode->i_mode;
- if (!S_ISREG(old_mode))
- GOTO(out_err, err = -EEXIST);
-
- /* Fixup file permissions if necessary */
- if (fix && (old_mode & S_IALLUGO) != (mode & S_IALLUGO)) {
- CWARN("fixing permissions on %s from %o to %o\n",
- name, old_mode, mode);
- dchild->d_inode->i_mode = (mode & S_IALLUGO) |
- (old_mode & ~S_IALLUGO);
- mark_inode_dirty(dchild->d_inode);
- }
- GOTO(out_up, dchild);
- }
-
- err = vfs_create(dir->d_inode, dchild, (mode & ~S_IFMT) | S_IFREG,
- NULL);
- if (err)
- GOTO(out_err, err);
-
- RETURN(dchild);
-
-out_err:
- dput(dchild);
- dchild = ERR_PTR(err);
-out_up:
- return dchild;
-}
-EXPORT_SYMBOL(simple_mknod);
-
/* utility to make a directory */
struct dentry *simple_mkdir(struct dentry *dir, struct vfsmount *mnt,
const char *name, int mode, int fix)
}
EXPORT_SYMBOL(lustre_rename);
-/*
- * Read a file from within kernel context. Prior to calling this
- * function we should already have done a push_ctxt().
- */
-int lustre_fread(struct file *file, void *buf, int len, loff_t *off)
-{
- ASSERT_KERNEL_CTXT("kernel doing read outside kernel context\n");
- if (!file || !file->f_op || !file->f_op->read || !off)
- RETURN(-ENOSYS);
-
- return file->f_op->read(file, buf, len, off);
-}
-EXPORT_SYMBOL(lustre_fread);
-
-/*
- * Write a file from within kernel context. Prior to calling this
- * function we should already have done a push_ctxt().
- */
-int lustre_fwrite(struct file *file, const void *buf, int len, loff_t *off)
-{
- ENTRY;
- ASSERT_KERNEL_CTXT("kernel doing write outside kernel context\n");
- if (!file)
- RETURN(-ENOENT);
- if (!file->f_op)
- RETURN(-ENOSYS);
- if (!off)
- RETURN(-EINVAL);
-
- if (!file->f_op->write)
- RETURN(-EROFS);
-
- RETURN(file->f_op->write(file, buf, len, off));
-}
-EXPORT_SYMBOL(lustre_fwrite);
-
-/*
- * Sync a file from within kernel context. Prior to calling this
- * function we should already have done a push_ctxt().
- */
-int lustre_fsync(struct file *file)
-{
- ENTRY;
- ASSERT_KERNEL_CTXT("kernel doing sync outside kernel context\n");
- if (!file || !file->f_op || !file->f_op->fsync)
- RETURN(-ENOSYS);
-
- RETURN(cfs_do_fsync(file, 0));
-}
-EXPORT_SYMBOL(lustre_fsync);
-
/* Note: dput(dchild) will be called if there is an error */
struct l_file *l_dentry_open(struct lvfs_run_ctxt *ctxt, struct l_dentry *de,
int flags)
}
EXPORT_SYMBOL(l_dentry_open);
-static int l_filldir(void *__buf, const char *name, int namlen, loff_t offset,
- u64 ino, unsigned int d_type)
-{
- struct l_linux_dirent *dirent;
- struct l_readdir_callback *buf = (struct l_readdir_callback *)__buf;
-
- dirent = buf->lrc_dirent;
- if (dirent)
- dirent->lld_off = offset;
-
- OBD_ALLOC(dirent, sizeof(*dirent));
-
- if (!dirent)
- return -ENOMEM;
-
- cfs_list_add_tail(&dirent->lld_list, buf->lrc_list);
-
- buf->lrc_dirent = dirent;
- dirent->lld_ino = ino;
- LASSERT(sizeof(dirent->lld_name) >= namlen + 1);
- memcpy(dirent->lld_name, name, namlen);
-
- return 0;
-}
-
-long l_readdir(struct file *file, cfs_list_t *dentry_list)
-{
- struct l_linux_dirent *lastdirent;
- struct l_readdir_callback buf;
- int error;
-
- buf.lrc_dirent = NULL;
- buf.lrc_list = dentry_list;
-
- error = vfs_readdir(file, l_filldir, &buf);
- if (error < 0)
- return error;
-
- lastdirent = buf.lrc_dirent;
- if (lastdirent)
- lastdirent->lld_off = file->f_pos;
-
- return 0;
-}
-EXPORT_SYMBOL(l_readdir);
-
-int l_notify_change(struct vfsmount *mnt, struct dentry *dchild,
- struct iattr *newattrs)
-{
- int rc;
-
- mutex_lock(&dchild->d_inode->i_mutex);
-#ifdef HAVE_SECURITY_PLUG
- rc = notify_change(dchild, mnt, newattrs);
-#else
- rc = notify_change(dchild, newattrs);
-#endif
- mutex_unlock(&dchild->d_inode->i_mutex);
- return rc;
-}
-EXPORT_SYMBOL(l_notify_change);
-
-/* utility to truncate a file */
-int simple_truncate(struct dentry *dir, struct vfsmount *mnt,
- char *name, loff_t length)
-{
- struct dentry *dchild;
- struct iattr newattrs;
- int err = 0;
- ENTRY;
-
- CDEBUG(D_INODE, "truncating file %.*s to %lld\n", (int)strlen(name),
- name, (long long)length);
- dchild = ll_lookup_one_len(name, dir, strlen(name));
- if (IS_ERR(dchild))
- GOTO(out, err = PTR_ERR(dchild));
-
- if (dchild->d_inode) {
- int old_mode = dchild->d_inode->i_mode;
- if (S_ISDIR(old_mode)) {
- CERROR("found %s (%lu/%u) is mode %o\n", name,
- dchild->d_inode->i_ino,
- dchild->d_inode->i_generation, old_mode);
- GOTO(out_dput, err = -EISDIR);
- }
-
- newattrs.ia_size = length;
- newattrs.ia_valid = ATTR_SIZE;
- err = l_notify_change(mnt, dchild, &newattrs);
- }
- EXIT;
-out_dput:
- dput(dchild);
-out:
- return err;
-}
-EXPORT_SYMBOL(simple_truncate);
-
int __lvfs_set_rdonly(lvfs_sbdev_type dev, lvfs_sbdev_type jdev)
{
#ifdef HAVE_DEV_SET_RDONLY
}
EXPORT_SYMBOL(lvfs_check_rdonly);
-int lvfs_check_io_health(struct obd_device *obd, struct file *file)
-{
- char *write_page = NULL;
- loff_t offset = 0;
- int rc = 0;
- ENTRY;
-
- OBD_ALLOC(write_page, CFS_PAGE_SIZE);
- if (!write_page)
- RETURN(-ENOMEM);
-
- rc = fsfilt_write_record(obd, file, write_page, CFS_PAGE_SIZE, &offset, 1);
-
- OBD_FREE(write_page, CFS_PAGE_SIZE);
-
- CDEBUG(D_INFO, "write 1 page synchronously for checking io rc %d\n",rc);
- RETURN(rc);
-}
-EXPORT_SYMBOL(lvfs_check_io_health);
-
void obd_update_maxusage()
{
__u64 max1, max2;
git://git.whamcloud.com / fs / lustre-release.git / blobdiff