-/*
+/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
+ * vim:expandtab:shiftwidth=8:tabstop=8:
+ *
* linux/fs/ext2/file.c
*
* This code is issued under the GNU General Public License.
* (jj@sunsite.ms.mff.cuni.cz)
*/
-#include <asm/uaccess.h>
-#include <asm/system.h>
+#define DEBUG_SUBSYSTEM S_LLITE
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/fcntl.h>
-#include <linux/sched.h>
-#include <linux/stat.h>
-#include <linux/locks.h>
-#include <linux/mm.h>
-#include <linux/pagemap.h>
-#include <linux/smp_lock.h>
+#include <linux/lustre_dlm.h>
+#include <linux/lustre_lite.h>
-#define DEBUG_SUBSYSTEM S_LLIGHT
+int ll_inode_setattr(struct inode *inode, struct iattr *attr, int do_trunc);
+extern int ll_setattr(struct dentry *de, struct iattr *attr);
-#include <linux/obd_support.h>
-#include <linux/lustre_light.h>
+static int ll_file_open(struct inode *inode, struct file *file)
+{
+ int rc;
+ struct ptlrpc_request *req = NULL;
+ struct ll_file_data *fd;
+ struct obdo *oa = NULL;
+ struct lov_stripe_md *md = NULL;
+ struct ll_sb_info *sbi = ll_i2sbi(inode);
+ struct ll_inode_info *lli = ll_i2info(inode);
+ ENTRY;
+
+ if (file->private_data)
+ LBUG();
+
+ /* delayed create of object (intent created inode) */
+ /* XXX object needs to be cleaned up if mdc_open fails */
+ /* XXX error handling appropriate here? */
+ if (lli->lli_smd == NULL || lli->lli_smd->lmd_object_id == 0) {
+ struct client_obd *mdc = sbi2mdc(ll_s2sbi(inode->i_sb));
+ struct inode * inode = file->f_dentry->d_inode;
+
+ lli->lli_smd = NULL;
+ oa = obdo_alloc();
+ if (!oa) {
+ RETURN(-ENOMEM);
+ }
+ oa->o_valid = OBD_MD_FLMODE;
+ oa->o_mode = S_IFREG | 0600;
+ oa->o_easize = mdc->cl_max_mdsize;
+ rc = obd_create(ll_i2obdconn(inode), oa, &lli->lli_smd);
+ if (rc)
+ RETURN(rc);
+ md = lli->lli_smd;
+ lli->lli_flags &= ~OBD_FL_CREATEONOPEN;
+ }
+
+ fd = kmem_cache_alloc(ll_file_data_slab, SLAB_KERNEL);
+ if (!fd)
+ GOTO(out, rc = -ENOMEM);
+ memset(fd, 0, sizeof(*fd));
+
+ rc = mdc_open(&sbi->ll_mdc_conn, inode->i_ino, S_IFREG | inode->i_mode,
+ file->f_flags, md,
+ (__u64)(unsigned long)file, &fd->fd_mdshandle, &req);
+ fd->fd_req = req;
+ ptlrpc_req_finished(req);
+ if (rc)
+ GOTO(out_req, -abs(rc));
+ if (!fd->fd_mdshandle) {
+ CERROR("mdc_open didn't assign fd_mdshandle\n");
+ /* XXX handle this how, abort or is it non-fatal? */
+ }
+ if (!fd->fd_mdshandle)
+ CERROR("mdc_open didn't assign fd_mdshandle\n");
+
+ if (oa == NULL) {
+ oa = obdo_alloc();
+ if (!oa)
+ GOTO(out_mdc, rc = -EINVAL);
+ }
+ oa->o_id = lli->lli_smd->lmd_object_id;
+ oa->o_mode = S_IFREG | inode->i_mode;
+ rc = obd_open(ll_i2obdconn(inode), oa, lli->lli_smd);
+ obdo_free(oa);
+ oa = NULL;
+
+ if (rc)
+ GOTO(out_mdc, rc = -abs(rc));
+
+ file->private_data = fd;
+
+ EXIT;
+
+ return 0;
+out_mdc:
+ mdc_close(&sbi->ll_mdc_conn, inode->i_ino,
+ S_IFREG, fd->fd_mdshandle, &req);
+out_req:
+ ptlrpc_free_req(req);
+//out_fd:
+ if (oa)
+ obdo_free(oa);
+ kmem_cache_free(ll_file_data_slab, fd);
+ file->private_data = NULL;
+out:
+ return rc;
+}
+
+static int ll_file_release(struct inode *inode, struct file *file)
+{
+ int rc;
+ struct ptlrpc_request *req = NULL;
+ struct ll_file_data *fd;
+ struct obdo *oa;
+ struct ll_sb_info *sbi = ll_i2sbi(inode);
+ struct ll_inode_info *lli = ll_i2info(inode);
+
+ ENTRY;
+
+ fd = (struct ll_file_data *)file->private_data;
+ if (!fd || !fd->fd_mdshandle) {
+ LBUG();
+ GOTO(out, rc = -EINVAL);
+ }
+
+ oa = obdo_alloc();
+ if (oa == NULL) {
+ LBUG();
+ GOTO(out_fd, rc = -ENOENT);
+ }
+ rc = obd_close(ll_i2obdconn(inode), oa, lli->lli_smd);
+ obdo_free(oa);
+ if (rc)
+ GOTO(out_fd, abs(rc));
+
+ if (file->f_mode & FMODE_WRITE) {
+ struct iattr attr;
+ attr.ia_valid = ATTR_MTIME | ATTR_CTIME | ATTR_ATIME | ATTR_SIZE;
+ attr.ia_mtime = inode->i_mtime;
+ attr.ia_ctime = inode->i_ctime;
+ attr.ia_atime = inode->i_atime;
+ attr.ia_size = inode->i_size;
+
+ /* XXX: this introduces a small race that we should evaluate */
+ rc = ll_inode_setattr(inode, &attr, 0);
+ if (rc) {
+ CERROR("failed - %d.\n", rc);
+ rc = -EIO; /* XXX - GOTO(out)? -phil */
+ }
+ }
+
+ rc = mdc_close(&sbi->ll_mdc_conn, inode->i_ino,
+ S_IFREG, fd->fd_mdshandle, &req);
+ ptlrpc_req_finished(req);
+ if (rc) {
+ if (rc > 0)
+ rc = -rc;
+ GOTO(out, rc);
+ }
+ ptlrpc_free_req(fd->fd_req);
+
+ EXIT;
+
+out_fd:
+ kmem_cache_free(ll_file_data_slab, fd);
+ file->private_data = NULL;
+out:
+ return rc;
+}
-extern int ll_setattr(struct dentry *de, struct iattr *attr);
static inline void ll_remove_suid(struct inode *inode)
{
mode &= inode->i_mode;
if (mode && !capable(CAP_FSETID)) {
inode->i_mode &= ~mode;
- // XXX careful here - we cannot change the size
+ // XXX careful here - we cannot change the size
}
}
+static void ll_update_atime(struct inode *inode)
+{
+ struct iattr attr;
+
+ attr.ia_atime = CURRENT_TIME;
+ attr.ia_valid = ATTR_ATIME;
+
+ if (inode->i_atime == attr.ia_atime) return;
+ if (IS_RDONLY(inode)) return;
+ if (IS_NOATIME(inode)) return;
+
+ /* ll_inode_setattr() sets inode->i_atime from attr.ia_atime */
+ ll_inode_setattr(inode, &attr, 0);
+}
+
+static int ll_lock_callback(struct lustre_handle *lockh,
+ struct ldlm_lock_desc *new,
+ void *data, __u32 data_len,
+ struct ptlrpc_request **reqp)
+{
+ struct inode *inode = data;
+ ENTRY;
+
+ if (new == NULL) {
+ /* Completion AST. Do nothing. */
+ RETURN(0);
+ }
+
+ if (data_len != sizeof(struct inode))
+ LBUG();
+
+ /* FIXME: do something better than throwing away everything */
+ if (inode == NULL)
+ LBUG();
+ down(&inode->i_sem);
+ CDEBUG(D_INODE, "invalidating obdo/inode %ld\n", inode->i_ino);
+ invalidate_inode_pages(inode);
+ up(&inode->i_sem);
+
+ if (ldlm_cli_cancel(lockh) < 0)
+ LBUG();
+ RETURN(0);
+}
+
+static ssize_t ll_file_read(struct file *filp, char *buf, size_t count,
+ loff_t *ppos)
+{
+ struct ll_file_data *fd = (struct ll_file_data *)filp->private_data;
+ struct inode *inode = filp->f_dentry->d_inode;
+ struct ll_sb_info *sbi = ll_i2sbi(inode);
+ struct ldlm_extent extent;
+ struct lustre_handle lockh;
+ __u64 res_id[RES_NAME_SIZE] = {inode->i_ino};
+ int flags = 0;
+ ldlm_error_t err;
+ ssize_t retval;
+ ENTRY;
+
+ if (!(fd->fd_flags & LL_FILE_IGNORE_LOCK)) {
+ extent.start = *ppos;
+ extent.end = *ppos + count;
+ CDEBUG(D_INFO, "Locking inode %ld, start %Lu end %Lu\n",
+ inode->i_ino, extent.start, extent.end);
+
+ err = obd_enqueue(&sbi->ll_osc_conn, NULL, res_id, LDLM_EXTENT,
+ &extent, sizeof(extent), LCK_PR, &flags,
+ ll_lock_callback, inode, sizeof(*inode),
+ &lockh);
+ if (err != ELDLM_OK) {
+ CERROR("lock enqueue: err: %d\n", err);
+ RETURN(err);
+ }
+ ldlm_lock_dump((void *)(unsigned long)lockh.addr);
+ }
+
+ CDEBUG(D_INFO, "Reading inode %ld, %d bytes, offset %Ld\n",
+ inode->i_ino, count, *ppos);
+ retval = generic_file_read(filp, buf, count, ppos);
+
+ if (retval > 0)
+ ll_update_atime(inode);
+
+ if (!(fd->fd_flags & LL_FILE_IGNORE_LOCK)) {
+ err = obd_cancel(&sbi->ll_osc_conn, LCK_PR, &lockh);
+ if (err != ELDLM_OK) {
+ CERROR("lock cancel: err: %d\n", err);
+ RETURN(err);
+ }
+ }
+
+ RETURN(retval);
+}
+
/*
* Write to a file (through the page cache).
*/
static ssize_t
ll_file_write(struct file *file, const char *buf, size_t count, loff_t *ppos)
{
+ struct ll_file_data *fd = (struct ll_file_data *)file->private_data;
+ struct inode *inode = file->f_dentry->d_inode;
+ struct ll_sb_info *sbi = ll_i2sbi(inode);
+ struct ldlm_extent extent;
+ struct lustre_handle lockh;
+ __u64 res_id[RES_NAME_SIZE] = {inode->i_ino};
+ int flags = 0;
+ ldlm_error_t err;
ssize_t retval;
- CDEBUG(D_INFO, "Writing inode %ld, %d bytes, offset %Ld\n",
- file->f_dentry->d_inode->i_ino, count, *ppos);
+ ENTRY;
+
+ if (!(fd->fd_flags & LL_FILE_IGNORE_LOCK)) {
+ /* FIXME: this should check whether O_APPEND is set and adjust
+ * extent.start accordingly */
+ extent.start = *ppos;
+ extent.end = *ppos + count;
+ CDEBUG(D_INFO, "Locking inode %ld, start %Lu end %Lu\n",
+ inode->i_ino, extent.start, extent.end);
+
+ err = obd_enqueue(&sbi->ll_osc_conn, NULL, res_id, LDLM_EXTENT,
+ &extent, sizeof(extent), LCK_PW, &flags,
+ ll_lock_callback, inode, sizeof(*inode),
+ &lockh);
+ if (err != ELDLM_OK) {
+ CERROR("lock enqueue: err: %d\n", err);
+ RETURN(err);
+ }
+ ldlm_lock_dump((void *)(unsigned long)lockh.addr);
+ }
+
+ CDEBUG(D_INFO, "Writing inode %ld, %ld bytes, offset %Ld\n",
+ inode->i_ino, (long)count, *ppos);
retval = generic_file_write(file, buf, count, ppos);
- CDEBUG(D_INFO, "Wrote %d\n", retval);
-
- /* update mtime/ctime/atime here, NOT size */
- if (retval > 0) {
- struct iattr attr;
- attr.ia_valid = ATTR_MTIME | ATTR_CTIME | ATTR_ATIME;
- attr.ia_mtime = attr.ia_ctime = attr.ia_atime =
- CURRENT_TIME;
- ll_setattr(file->f_dentry, &attr);
+
+ if (!(fd->fd_flags & LL_FILE_IGNORE_LOCK)) {
+ err = obd_cancel(&sbi->ll_osc_conn, LCK_PW, &lockh);
+ if (err != ELDLM_OK) {
+ CERROR("lock cancel: err: %d\n", err);
+ RETURN(err);
+ }
}
- EXIT;
- return retval;
+
+ RETURN(retval);
}
+int ll_file_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ struct ll_file_data *fd = (struct ll_file_data *)file->private_data;
+ int flags;
+
+ switch(cmd) {
+ case LL_IOC_GETFLAGS:
+ /* Get the current value of the file flags */
+ return put_user(fd->fd_flags, (int *)arg);
+ case LL_IOC_SETFLAGS:
+ case LL_IOC_CLRFLAGS:
+ /* Set or clear specific file flags */
+ /* XXX This probably needs checks to ensure the flags are
+ * not abused, and to handle any flag side effects.
+ */
+ if (get_user(flags, (int *) arg))
+ return -EFAULT;
+
+ if (cmd == LL_IOC_SETFLAGS)
+ fd->fd_flags |= flags;
+ else
+ fd->fd_flags &= ~flags;
+ return 0;
+
+ /* We need to special case any other ioctls we want to handle,
+ * to send them to the MDS/OST as appropriate and to properly
+ * network encode the arg field.
+ case EXT2_IOC_GETFLAGS:
+ case EXT2_IOC_SETFLAGS:
+ case EXT2_IOC_GETVERSION_OLD:
+ case EXT2_IOC_GETVERSION_NEW:
+ case EXT2_IOC_SETVERSION_OLD:
+ case EXT2_IOC_SETVERSION_NEW:
+ */
+ default:
+ return -ENOTTY;
+ }
+}
/* XXX this does not need to do anything for data, it _does_ need to
- call setattr */
+ call setattr */
int ll_fsync(struct file *file, struct dentry *dentry, int data)
{
- return 0;
+ return 0;
}
struct file_operations ll_file_operations = {
- read: generic_file_read,
- write: ll_file_write,
- mmap: generic_file_mmap,
- fsync: NULL
+ read: ll_file_read,
+ write: ll_file_write,
+ ioctl: ll_file_ioctl,
+ open: ll_file_open,
+ release: ll_file_release,
+ mmap: generic_file_mmap,
+ fsync: NULL
};
-
struct inode_operations ll_file_inode_operations = {
truncate: ll_truncate,
- setattr: ll_setattr
+ setattr: ll_setattr
};
-