1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * This code is issued under the GNU General Public License.
7 * See the file COPYING in this distribution
9 * Copyright (C) 1992, 1993, 1994, 1995
10 * Remy Card (card@masi.ibp.fr)
11 * Laboratoire MASI - Institut Blaise Pascal
12 * Universite Pierre et Marie Curie (Paris VI)
16 * linux/fs/minix/file.c
18 * Copyright (C) 1991, 1992 Linus Torvalds
20 * ext2 fs regular file handling primitives
22 * 64-bit file support on 64-bit platforms by Jakub Jelinek
23 * (jj@sunsite.ms.mff.cuni.cz)
26 #define DEBUG_SUBSYSTEM S_LLITE
28 #include <linux/lustre_dlm.h>
29 #include <linux/lustre_lite.h>
31 int ll_inode_setattr(struct inode *inode, struct iattr *attr, int do_trunc);
32 extern int ll_setattr(struct dentry *de, struct iattr *attr);
34 static int ll_file_open(struct inode *inode, struct file *file)
37 struct ptlrpc_request *req = NULL;
38 struct ll_file_data *fd;
39 struct obdo *oa = NULL;
40 struct lov_stripe_md *md = NULL;
41 struct ll_sb_info *sbi = ll_i2sbi(inode);
42 struct ll_inode_info *lli = ll_i2info(inode);
45 if (file->private_data)
48 /* delayed create of object (intent created inode) */
49 /* XXX object needs to be cleaned up if mdc_open fails */
50 /* XXX error handling appropriate here? */
51 if (lli->lli_smd == NULL) {
52 struct client_obd *mdc = sbi2mdc(ll_s2sbi(inode->i_sb));
53 struct inode * inode = file->f_dentry->d_inode;
55 down(&lli->lli_open_sem);
56 /* Check to see if we lost the race */
57 if (lli->lli_smd == NULL) {
60 up(&lli->lli_open_sem);
63 oa->o_mode = S_IFREG | 0600;
64 oa->o_easize = mdc->cl_max_mdsize;
65 oa->o_valid = OBD_MD_FLMODE | OBD_MD_FLEASIZE;
66 rc = obd_create(ll_i2obdconn(inode), oa, &lli->lli_smd);
69 up(&lli->lli_open_sem);
74 if (lli->lli_smd && lli->lli_smd->lmd_object_id == 0)
76 up(&lli->lli_open_sem);
79 fd = kmem_cache_alloc(ll_file_data_slab, SLAB_KERNEL);
81 GOTO(out, rc = -ENOMEM);
82 memset(fd, 0, sizeof(*fd));
84 rc = mdc_open(&sbi->ll_mdc_conn, inode->i_ino, S_IFREG | inode->i_mode,
86 (__u64)(unsigned long)file, &fd->fd_mdshandle, &req);
88 ptlrpc_req_finished(req);
90 GOTO(out_req, -abs(rc));
91 if (!fd->fd_mdshandle) {
92 CERROR("mdc_open didn't assign fd_mdshandle\n");
93 /* XXX handle this how, abort or is it non-fatal? */
95 if (!fd->fd_mdshandle)
96 CERROR("mdc_open didn't assign fd_mdshandle\n");
98 if (oa == NULL && (oa = obdo_alloc()) == NULL)
99 GOTO(out_mdc, rc = -EINVAL);
101 oa->o_id = lli->lli_smd->lmd_object_id;
102 oa->o_mode = S_IFREG | inode->i_mode;
103 oa->o_valid = OBD_MD_FLMODE | OBD_MD_FLID;
104 rc = obd_open(ll_i2obdconn(inode), oa, lli->lli_smd);
109 GOTO(out_mdc, rc = -abs(rc));
111 file->private_data = fd;
117 mdc_close(&sbi->ll_mdc_conn, inode->i_ino,
118 S_IFREG, fd->fd_mdshandle, &req);
120 ptlrpc_free_req(req);
123 kmem_cache_free(ll_file_data_slab, fd);
124 file->private_data = NULL;
129 static int ll_file_release(struct inode *inode, struct file *file)
132 struct ptlrpc_request *req = NULL;
133 struct ll_file_data *fd;
135 struct ll_sb_info *sbi = ll_i2sbi(inode);
136 struct ll_inode_info *lli = ll_i2info(inode);
140 fd = (struct ll_file_data *)file->private_data;
141 if (!fd || !fd->fd_mdshandle) {
143 GOTO(out, rc = -EINVAL);
149 GOTO(out_fd, rc = -ENOENT);
151 oa->o_id = lli->lli_smd->lmd_object_id;
152 oa->o_mode = S_IFREG;
153 oa->o_valid = (OBD_MD_FLMODE | OBD_MD_FLID);
154 rc = obd_close(ll_i2obdconn(inode), oa, lli->lli_smd);
157 GOTO(out_fd, abs(rc));
159 if (file->f_mode & FMODE_WRITE) {
161 attr.ia_valid = ATTR_MTIME | ATTR_CTIME | ATTR_ATIME | ATTR_SIZE;
162 attr.ia_mtime = inode->i_mtime;
163 attr.ia_ctime = inode->i_ctime;
164 attr.ia_atime = inode->i_atime;
165 attr.ia_size = inode->i_size;
167 /* XXX: this introduces a small race that we should evaluate */
168 rc = ll_inode_setattr(inode, &attr, 0);
170 CERROR("failed - %d.\n", rc);
171 rc = -EIO; /* XXX - GOTO(out)? -phil */
175 rc = mdc_close(&sbi->ll_mdc_conn, inode->i_ino,
176 S_IFREG, fd->fd_mdshandle, &req);
177 ptlrpc_req_finished(req);
183 ptlrpc_free_req(fd->fd_req);
188 kmem_cache_free(ll_file_data_slab, fd);
189 file->private_data = NULL;
195 static inline void ll_remove_suid(struct inode *inode)
199 /* set S_IGID if S_IXGRP is set, and always set S_ISUID */
200 mode = (inode->i_mode & S_IXGRP)*(S_ISGID/S_IXGRP) | S_ISUID;
202 /* was any of the uid bits set? */
203 mode &= inode->i_mode;
204 if (mode && !capable(CAP_FSETID)) {
205 inode->i_mode &= ~mode;
206 // XXX careful here - we cannot change the size
210 static void ll_update_atime(struct inode *inode)
214 attr.ia_atime = CURRENT_TIME;
215 attr.ia_valid = ATTR_ATIME;
217 if (inode->i_atime == attr.ia_atime) return;
218 if (IS_RDONLY(inode)) return;
219 if (IS_NOATIME(inode)) return;
221 /* ll_inode_setattr() sets inode->i_atime from attr.ia_atime */
222 ll_inode_setattr(inode, &attr, 0);
225 static int ll_lock_callback(struct lustre_handle *lockh,
226 struct ldlm_lock_desc *new,
227 void *data, __u32 data_len,
228 struct ptlrpc_request **reqp)
230 struct inode *inode = data;
234 /* Completion AST. Do nothing. */
238 if (data_len != sizeof(struct inode))
241 /* FIXME: do something better than throwing away everything */
245 CDEBUG(D_INODE, "invalidating obdo/inode %ld\n", inode->i_ino);
246 invalidate_inode_pages(inode);
249 if (ldlm_cli_cancel(lockh) < 0)
254 static ssize_t ll_file_read(struct file *filp, char *buf, size_t count,
257 struct ll_file_data *fd = (struct ll_file_data *)filp->private_data;
258 struct inode *inode = filp->f_dentry->d_inode;
259 struct ll_sb_info *sbi = ll_i2sbi(inode);
260 struct ldlm_extent extent;
261 struct lustre_handle lockh;
262 __u64 res_id[RES_NAME_SIZE] = {inode->i_ino};
268 if (!(fd->fd_flags & LL_FILE_IGNORE_LOCK)) {
269 extent.start = *ppos;
270 extent.end = *ppos + count;
271 CDEBUG(D_INFO, "Locking inode %ld, start %Lu end %Lu\n",
272 inode->i_ino, extent.start, extent.end);
274 err = obd_enqueue(&sbi->ll_osc_conn, NULL, res_id, LDLM_EXTENT,
275 &extent, sizeof(extent), LCK_PR, &flags,
276 ll_lock_callback, inode, sizeof(*inode),
278 if (err != ELDLM_OK) {
279 CERROR("lock enqueue: err: %d\n", err);
282 ldlm_lock_dump((void *)(unsigned long)lockh.addr);
285 CDEBUG(D_INFO, "Reading inode %ld, %d bytes, offset %Ld\n",
286 inode->i_ino, count, *ppos);
287 retval = generic_file_read(filp, buf, count, ppos);
290 ll_update_atime(inode);
292 if (!(fd->fd_flags & LL_FILE_IGNORE_LOCK)) {
293 err = obd_cancel(&sbi->ll_osc_conn, LCK_PR, &lockh);
294 if (err != ELDLM_OK) {
295 CERROR("lock cancel: err: %d\n", err);
304 * Write to a file (through the page cache).
307 ll_file_write(struct file *file, const char *buf, size_t count, loff_t *ppos)
309 struct ll_file_data *fd = (struct ll_file_data *)file->private_data;
310 struct inode *inode = file->f_dentry->d_inode;
311 struct ll_sb_info *sbi = ll_i2sbi(inode);
312 struct ldlm_extent extent;
313 struct lustre_handle lockh;
314 __u64 res_id[RES_NAME_SIZE] = {inode->i_ino};
320 if (!(fd->fd_flags & LL_FILE_IGNORE_LOCK)) {
321 /* FIXME: this should check whether O_APPEND is set and adjust
322 * extent.start accordingly */
323 extent.start = *ppos;
324 extent.end = *ppos + count;
325 CDEBUG(D_INFO, "Locking inode %ld, start %Lu end %Lu\n",
326 inode->i_ino, extent.start, extent.end);
328 err = obd_enqueue(&sbi->ll_osc_conn, NULL, res_id, LDLM_EXTENT,
329 &extent, sizeof(extent), LCK_PW, &flags,
330 ll_lock_callback, inode, sizeof(*inode),
332 if (err != ELDLM_OK) {
333 CERROR("lock enqueue: err: %d\n", err);
336 ldlm_lock_dump((void *)(unsigned long)lockh.addr);
339 CDEBUG(D_INFO, "Writing inode %ld, %ld bytes, offset %Ld\n",
340 inode->i_ino, (long)count, *ppos);
342 retval = generic_file_write(file, buf, count, ppos);
344 if (!(fd->fd_flags & LL_FILE_IGNORE_LOCK)) {
345 err = obd_cancel(&sbi->ll_osc_conn, LCK_PW, &lockh);
346 if (err != ELDLM_OK) {
347 CERROR("lock cancel: err: %d\n", err);
355 int ll_file_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
358 struct ll_file_data *fd = (struct ll_file_data *)file->private_data;
362 case LL_IOC_GETFLAGS:
363 /* Get the current value of the file flags */
364 return put_user(fd->fd_flags, (int *)arg);
365 case LL_IOC_SETFLAGS:
366 case LL_IOC_CLRFLAGS:
367 /* Set or clear specific file flags */
368 /* XXX This probably needs checks to ensure the flags are
369 * not abused, and to handle any flag side effects.
371 if (get_user(flags, (int *) arg))
374 if (cmd == LL_IOC_SETFLAGS)
375 fd->fd_flags |= flags;
377 fd->fd_flags &= ~flags;
380 /* We need to special case any other ioctls we want to handle,
381 * to send them to the MDS/OST as appropriate and to properly
382 * network encode the arg field.
383 case EXT2_IOC_GETFLAGS:
384 case EXT2_IOC_SETFLAGS:
385 case EXT2_IOC_GETVERSION_OLD:
386 case EXT2_IOC_GETVERSION_NEW:
387 case EXT2_IOC_SETVERSION_OLD:
388 case EXT2_IOC_SETVERSION_NEW:
395 /* XXX this does not need to do anything for data, it _does_ need to
397 int ll_fsync(struct file *file, struct dentry *dentry, int data)
402 struct file_operations ll_file_operations = {
404 write: ll_file_write,
405 ioctl: ll_file_ioctl,
407 release: ll_file_release,
408 mmap: generic_file_mmap,
412 struct inode_operations ll_file_inode_operations = {
413 truncate: ll_truncate,