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_id = inode->i_ino;
66 oa->o_valid = OBD_MD_FLMODE | OBD_MD_FLEASIZE |
68 rc = obd_create(ll_i2obdconn(inode), oa, &lli->lli_smd);
71 up(&lli->lli_open_sem);
76 if (lli->lli_smd->lmd_object_id == 0)
78 up(&lli->lli_open_sem);
81 fd = kmem_cache_alloc(ll_file_data_slab, SLAB_KERNEL);
83 GOTO(out, rc = -ENOMEM);
84 memset(fd, 0, sizeof(*fd));
86 rc = mdc_open(&sbi->ll_mdc_conn, inode->i_ino, S_IFREG | inode->i_mode,
87 file->f_flags, md, (__u64)(unsigned long)file,
88 &fd->fd_mdshandle, &req);
90 ptlrpc_req_finished(req);
92 GOTO(out_req, -abs(rc));
93 if (!fd->fd_mdshandle) {
94 CERROR("mdc_open didn't assign fd_mdshandle\n");
95 /* XXX handle this how, abort or is it non-fatal? */
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);
137 struct obd_device *obddev = class_conn2obd(&sbi->ll_osc_conn);
138 struct list_head *tmp, *next;
142 fd = (struct ll_file_data *)file->private_data;
143 if (!fd || !fd->fd_mdshandle) {
145 GOTO(out, rc = -EINVAL);
151 GOTO(out_fd, rc = -ENOENT);
153 oa->o_id = lli->lli_smd->lmd_object_id;
154 oa->o_mode = S_IFREG;
155 oa->o_valid = (OBD_MD_FLMODE | OBD_MD_FLID);
156 rc = obd_close(ll_i2obdconn(inode), oa, lli->lli_smd);
159 GOTO(out_fd, abs(rc));
161 if (file->f_mode & FMODE_WRITE) {
163 attr.ia_valid = (ATTR_MTIME | ATTR_CTIME | ATTR_ATIME |
165 attr.ia_mtime = inode->i_mtime;
166 attr.ia_ctime = inode->i_ctime;
167 attr.ia_atime = inode->i_atime;
168 attr.ia_size = inode->i_size;
170 /* XXX: this introduces a small race that we should evaluate */
171 rc = ll_inode_setattr(inode, &attr, 0);
173 CERROR("failed - %d.\n", rc);
174 rc = -EIO; /* XXX - GOTO(out)? -phil */
178 rc = mdc_close(&sbi->ll_mdc_conn, inode->i_ino,
179 S_IFREG, fd->fd_mdshandle, &req);
180 ptlrpc_req_finished(req);
186 ptlrpc_free_req(fd->fd_req);
188 l_lock(&obddev->obd_namespace->ns_lock);
189 list_for_each_safe(tmp, next, &lli->lli_osc_locks) {
190 struct ldlm_lock *lock;
191 struct lustre_handle lockh;
192 lock = list_entry(tmp, struct ldlm_lock, l_inode_link);
194 if (!list_empty(&lock->l_inode_link)) {
195 list_del_init(&lock->l_inode_link);
198 ldlm_lock2handle(lock, &lockh);
199 rc = ldlm_cli_cancel(&lockh);
201 CERROR("ldlm_cli_cancel: %d\n", rc);
203 l_unlock(&obddev->obd_namespace->ns_lock);
208 kmem_cache_free(ll_file_data_slab, fd);
209 file->private_data = NULL;
215 static inline void ll_remove_suid(struct inode *inode)
219 /* set S_IGID if S_IXGRP is set, and always set S_ISUID */
220 mode = (inode->i_mode & S_IXGRP)*(S_ISGID/S_IXGRP) | S_ISUID;
222 /* was any of the uid bits set? */
223 mode &= inode->i_mode;
224 if (mode && !capable(CAP_FSETID)) {
225 inode->i_mode &= ~mode;
226 // XXX careful here - we cannot change the size
230 static void ll_update_atime(struct inode *inode)
234 attr.ia_atime = CURRENT_TIME;
235 attr.ia_valid = ATTR_ATIME;
237 if (inode->i_atime == attr.ia_atime) return;
238 if (IS_RDONLY(inode)) return;
239 if (IS_NOATIME(inode)) return;
241 /* ll_inode_setattr() sets inode->i_atime from attr.ia_atime */
242 ll_inode_setattr(inode, &attr, 0);
245 static int ll_lock_callback(struct ldlm_lock *lock, struct ldlm_lock_desc *new,
246 void *data, __u32 data_len)
248 struct inode *inode = data;
249 struct lustre_handle lockh;
253 if (data_len != sizeof(struct inode))
259 CDEBUG(D_INODE, "invalidating obdo/inode %ld\n", inode->i_ino);
260 /* FIXME: do something better than throwing away everything */
261 invalidate_inode_pages(inode);
264 ldlm_lock2handle(lock, &lockh);
265 l_lock(&lock->l_resource->lr_namespace->ns_lock);
266 if (!list_empty(&lock->l_inode_link)) {
267 list_del_init(&lock->l_inode_link);
270 l_unlock(&lock->l_resource->lr_namespace->ns_lock);
272 rc = ldlm_cli_cancel(&lockh);
274 CERROR("ldlm_cli_cancel failed: %d\n", rc);
278 static ssize_t ll_file_read(struct file *filp, char *buf, size_t count,
281 struct ll_file_data *fd = (struct ll_file_data *)filp->private_data;
282 struct inode *inode = filp->f_dentry->d_inode;
283 struct ll_sb_info *sbi = ll_i2sbi(inode);
284 struct ldlm_extent extent;
285 struct lustre_handle *lockhs = NULL;
286 struct lov_stripe_md *md = ll_i2info(inode)->lli_smd;
292 if (!(fd->fd_flags & LL_FILE_IGNORE_LOCK)) {
293 OBD_ALLOC(lockhs, md->lmd_stripe_count * sizeof(*lockhs));
297 extent.start = *ppos;
298 extent.end = *ppos + count;
299 CDEBUG(D_INFO, "Locking inode %ld, start %Lu end %Lu\n",
300 inode->i_ino, extent.start, extent.end);
302 err = obd_enqueue(&sbi->ll_osc_conn, md, NULL, LDLM_EXTENT,
303 &extent, sizeof(extent), LCK_PR, &flags,
304 ll_lock_callback, inode, sizeof(*inode),
306 if (err != ELDLM_OK) {
307 OBD_FREE(lockhs, md->lmd_stripe_count *sizeof(*lockhs));
308 CERROR("lock enqueue: err: %d\n", err);
313 CDEBUG(D_INFO, "Reading inode %ld, %d bytes, offset %Ld\n",
314 inode->i_ino, count, *ppos);
315 retval = generic_file_read(filp, buf, count, ppos);
318 ll_update_atime(inode);
320 if (!(fd->fd_flags & LL_FILE_IGNORE_LOCK)) {
321 err = obd_cancel(&sbi->ll_osc_conn, md, LCK_PR, lockhs);
322 if (err != ELDLM_OK) {
323 OBD_FREE(lockhs, md->lmd_stripe_count * sizeof(*lockhs));
324 CERROR("lock cancel: err: %d\n", err);
330 OBD_FREE(lockhs, md->lmd_stripe_count * sizeof(*lockhs));
335 * Write to a file (through the page cache).
338 ll_file_write(struct file *file, const char *buf, size_t count, loff_t *ppos)
340 struct ll_file_data *fd = (struct ll_file_data *)file->private_data;
341 struct inode *inode = file->f_dentry->d_inode;
342 struct ll_sb_info *sbi = ll_i2sbi(inode);
343 struct ldlm_extent extent;
344 struct lustre_handle *lockhs = NULL;
345 struct lov_stripe_md *md = ll_i2info(inode)->lli_smd;
351 if (!(fd->fd_flags & LL_FILE_IGNORE_LOCK)) {
352 OBD_ALLOC(lockhs, md->lmd_stripe_count * sizeof(*lockhs));
355 /* FIXME: this should check whether O_APPEND is set and adjust
356 * extent.start accordingly */
357 extent.start = *ppos;
358 extent.end = *ppos + count;
359 CDEBUG(D_INFO, "Locking inode %ld, start %Lu end %Lu\n",
360 inode->i_ino, extent.start, extent.end);
362 err = obd_enqueue(&sbi->ll_osc_conn, md, NULL, LDLM_EXTENT,
363 &extent, sizeof(extent), LCK_PW, &flags,
364 ll_lock_callback, inode, sizeof(*inode),
366 if (err != ELDLM_OK) {
367 OBD_FREE(lockhs, md->lmd_stripe_count *sizeof(*lockhs));
368 CERROR("lock enqueue: err: %d\n", err);
373 CDEBUG(D_INFO, "Writing inode %ld, %ld bytes, offset %Ld\n",
374 inode->i_ino, (long)count, *ppos);
376 retval = generic_file_write(file, buf, count, ppos);
378 if (!(fd->fd_flags & LL_FILE_IGNORE_LOCK)) {
379 err = obd_cancel(&sbi->ll_osc_conn, md, LCK_PW, lockhs);
380 if (err != ELDLM_OK) {
381 OBD_FREE(lockhs, md->lmd_stripe_count *sizeof(*lockhs));
382 CERROR("lock cancel: err: %d\n", err);
388 OBD_FREE(lockhs, md->lmd_stripe_count * sizeof(*lockhs));
392 int ll_file_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
395 struct ll_file_data *fd = (struct ll_file_data *)file->private_data;
399 case LL_IOC_GETFLAGS:
400 /* Get the current value of the file flags */
401 return put_user(fd->fd_flags, (int *)arg);
402 case LL_IOC_SETFLAGS:
403 case LL_IOC_CLRFLAGS:
404 /* Set or clear specific file flags */
405 /* XXX This probably needs checks to ensure the flags are
406 * not abused, and to handle any flag side effects.
408 if (get_user(flags, (int *) arg))
411 if (cmd == LL_IOC_SETFLAGS)
412 fd->fd_flags |= flags;
414 fd->fd_flags &= ~flags;
417 /* We need to special case any other ioctls we want to handle,
418 * to send them to the MDS/OST as appropriate and to properly
419 * network encode the arg field.
420 case EXT2_IOC_GETFLAGS:
421 case EXT2_IOC_SETFLAGS:
422 case EXT2_IOC_GETVERSION_OLD:
423 case EXT2_IOC_GETVERSION_NEW:
424 case EXT2_IOC_SETVERSION_OLD:
425 case EXT2_IOC_SETVERSION_NEW:
432 /* XXX this does not need to do anything for data, it _does_ need to
434 int ll_fsync(struct file *file, struct dentry *dentry, int data)
439 struct file_operations ll_file_operations = {
441 write: ll_file_write,
442 ioctl: ll_file_ioctl,
444 release: ll_file_release,
445 mmap: generic_file_mmap,
449 struct inode_operations ll_file_inode_operations = {
450 truncate: ll_truncate,