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 oa->o_id = inode->i_ino;
67 rc = obd_create(ll_i2obdconn(inode), oa, &lli->lli_smd);
70 up(&lli->lli_open_sem);
75 if (lli->lli_smd && lli->lli_smd->lmd_object_id == 0)
77 up(&lli->lli_open_sem);
80 fd = kmem_cache_alloc(ll_file_data_slab, SLAB_KERNEL);
82 GOTO(out, rc = -ENOMEM);
83 memset(fd, 0, sizeof(*fd));
85 rc = mdc_open(&sbi->ll_mdc_conn, inode->i_ino, S_IFREG | inode->i_mode,
86 file->f_flags, md, (__u64)(unsigned long)file,
87 &fd->fd_mdshandle, &req);
89 ptlrpc_req_finished(req);
91 GOTO(out_req, -abs(rc));
92 if (!fd->fd_mdshandle) {
93 CERROR("mdc_open didn't assign fd_mdshandle\n");
94 /* XXX handle this how, abort or is it non-fatal? */
96 if (!fd->fd_mdshandle)
97 CERROR("mdc_open didn't assign fd_mdshandle\n");
99 if (oa == NULL && (oa = obdo_alloc()) == NULL)
100 GOTO(out_mdc, rc = -EINVAL);
102 oa->o_id = lli->lli_smd->lmd_object_id;
103 oa->o_mode = S_IFREG | inode->i_mode;
104 oa->o_valid = OBD_MD_FLMODE | OBD_MD_FLID;
105 rc = obd_open(ll_i2obdconn(inode), oa, lli->lli_smd);
110 GOTO(out_mdc, rc = -abs(rc));
112 file->private_data = fd;
118 mdc_close(&sbi->ll_mdc_conn, inode->i_ino,
119 S_IFREG, fd->fd_mdshandle, &req);
121 ptlrpc_free_req(req);
124 kmem_cache_free(ll_file_data_slab, fd);
125 file->private_data = NULL;
130 static int ll_file_release(struct inode *inode, struct file *file)
133 struct ptlrpc_request *req = NULL;
134 struct ll_file_data *fd;
136 struct ll_sb_info *sbi = ll_i2sbi(inode);
137 struct ll_inode_info *lli = ll_i2info(inode);
141 fd = (struct ll_file_data *)file->private_data;
142 if (!fd || !fd->fd_mdshandle) {
144 GOTO(out, rc = -EINVAL);
150 GOTO(out_fd, rc = -ENOENT);
152 oa->o_id = lli->lli_smd->lmd_object_id;
153 oa->o_mode = S_IFREG;
154 oa->o_valid = (OBD_MD_FLMODE | OBD_MD_FLID);
155 rc = obd_close(ll_i2obdconn(inode), oa, lli->lli_smd);
158 GOTO(out_fd, abs(rc));
160 if (file->f_mode & FMODE_WRITE) {
162 attr.ia_valid = (ATTR_MTIME | ATTR_CTIME | ATTR_ATIME |
164 attr.ia_mtime = inode->i_mtime;
165 attr.ia_ctime = inode->i_ctime;
166 attr.ia_atime = inode->i_atime;
167 attr.ia_size = inode->i_size;
169 /* XXX: this introduces a small race that we should evaluate */
170 rc = ll_inode_setattr(inode, &attr, 0);
172 CERROR("failed - %d.\n", rc);
173 rc = -EIO; /* XXX - GOTO(out)? -phil */
177 rc = mdc_close(&sbi->ll_mdc_conn, inode->i_ino,
178 S_IFREG, fd->fd_mdshandle, &req);
179 ptlrpc_req_finished(req);
185 ptlrpc_free_req(fd->fd_req);
190 kmem_cache_free(ll_file_data_slab, fd);
191 file->private_data = NULL;
197 static inline void ll_remove_suid(struct inode *inode)
201 /* set S_IGID if S_IXGRP is set, and always set S_ISUID */
202 mode = (inode->i_mode & S_IXGRP)*(S_ISGID/S_IXGRP) | S_ISUID;
204 /* was any of the uid bits set? */
205 mode &= inode->i_mode;
206 if (mode && !capable(CAP_FSETID)) {
207 inode->i_mode &= ~mode;
208 // XXX careful here - we cannot change the size
212 static void ll_update_atime(struct inode *inode)
216 attr.ia_atime = CURRENT_TIME;
217 attr.ia_valid = ATTR_ATIME;
219 if (inode->i_atime == attr.ia_atime) return;
220 if (IS_RDONLY(inode)) return;
221 if (IS_NOATIME(inode)) return;
223 /* ll_inode_setattr() sets inode->i_atime from attr.ia_atime */
224 ll_inode_setattr(inode, &attr, 0);
227 static int ll_lock_callback(struct ldlm_lock *lock, struct ldlm_lock_desc *new,
228 void *data, __u32 data_len)
230 struct inode *inode = data;
231 struct lustre_handle lockh;
235 if (data_len != sizeof(struct inode))
238 /* FIXME: do something better than throwing away everything */
242 CDEBUG(D_INODE, "invalidating obdo/inode %ld\n", inode->i_ino);
243 invalidate_inode_pages(inode);
246 ldlm_lock2handle(lock, &lockh);
247 rc = ldlm_cli_cancel(&lockh);
249 CERROR("ldlm_cli_cancel failed: %d\n", rc);
253 static ssize_t ll_file_read(struct file *filp, char *buf, size_t count,
256 struct ll_file_data *fd = (struct ll_file_data *)filp->private_data;
257 struct inode *inode = filp->f_dentry->d_inode;
258 struct ll_sb_info *sbi = ll_i2sbi(inode);
259 struct ldlm_extent extent;
260 struct lustre_handle *lockhs = NULL;
261 struct lov_stripe_md *md = ll_i2info(inode)->lli_smd;
267 if (!(fd->fd_flags & LL_FILE_IGNORE_LOCK)) {
268 OBD_ALLOC(lockhs, md->lmd_stripe_count * sizeof(*lockhs));
272 extent.start = *ppos;
273 extent.end = *ppos + count;
274 CDEBUG(D_INFO, "Locking inode %ld, start %Lu end %Lu\n",
275 inode->i_ino, extent.start, extent.end);
277 err = obd_enqueue(&sbi->ll_osc_conn, md, NULL, LDLM_EXTENT,
278 &extent, sizeof(extent), LCK_PR, &flags,
279 ll_lock_callback, inode, sizeof(*inode),
281 if (err != ELDLM_OK) {
282 OBD_FREE(lockhs, md->lmd_stripe_count * sizeof(*lockhs));
283 CERROR("lock enqueue: err: %d\n", err);
288 CDEBUG(D_INFO, "Reading inode %ld, %d bytes, offset %Ld\n",
289 inode->i_ino, count, *ppos);
290 retval = generic_file_read(filp, buf, count, ppos);
293 ll_update_atime(inode);
295 if (!(fd->fd_flags & LL_FILE_IGNORE_LOCK)) {
296 err = obd_cancel(&sbi->ll_osc_conn, md, LCK_PR, lockhs);
297 if (err != ELDLM_OK) {
298 OBD_FREE(lockhs, md->lmd_stripe_count * sizeof(*lockhs));
299 CERROR("lock cancel: err: %d\n", err);
305 OBD_FREE(lockhs, md->lmd_stripe_count * sizeof(*lockhs));
310 * Write to a file (through the page cache).
313 ll_file_write(struct file *file, const char *buf, size_t count, loff_t *ppos)
315 struct ll_file_data *fd = (struct ll_file_data *)file->private_data;
316 struct inode *inode = file->f_dentry->d_inode;
317 struct ll_sb_info *sbi = ll_i2sbi(inode);
318 struct ldlm_extent extent;
319 struct lustre_handle *lockhs = NULL;
320 struct lov_stripe_md *md = ll_i2info(inode)->lli_smd;
326 if (!(fd->fd_flags & LL_FILE_IGNORE_LOCK)) {
327 OBD_ALLOC(lockhs, md->lmd_stripe_count * sizeof(*lockhs));
330 /* FIXME: this should check whether O_APPEND is set and adjust
331 * extent.start accordingly */
332 extent.start = *ppos;
333 extent.end = *ppos + count;
334 CDEBUG(D_INFO, "Locking inode %ld, start %Lu end %Lu\n",
335 inode->i_ino, extent.start, extent.end);
337 err = obd_enqueue(&sbi->ll_osc_conn, md, NULL, LDLM_EXTENT,
338 &extent, sizeof(extent), LCK_PW, &flags,
339 ll_lock_callback, inode, sizeof(*inode),
341 if (err != ELDLM_OK) {
342 OBD_FREE(lockhs, md->lmd_stripe_count * sizeof(*lockhs));
343 CERROR("lock enqueue: err: %d\n", err);
348 CDEBUG(D_INFO, "Writing inode %ld, %ld bytes, offset %Ld\n",
349 inode->i_ino, (long)count, *ppos);
351 retval = generic_file_write(file, buf, count, ppos);
353 if (!(fd->fd_flags & LL_FILE_IGNORE_LOCK)) {
354 err = obd_cancel(&sbi->ll_osc_conn, md, LCK_PW, lockhs);
355 if (err != ELDLM_OK) {
356 OBD_FREE(lockhs, md->lmd_stripe_count * sizeof(*lockhs));
357 CERROR("lock cancel: err: %d\n", err);
363 OBD_FREE(lockhs, md->lmd_stripe_count * sizeof(*lockhs));
367 int ll_file_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
370 struct ll_file_data *fd = (struct ll_file_data *)file->private_data;
374 case LL_IOC_GETFLAGS:
375 /* Get the current value of the file flags */
376 return put_user(fd->fd_flags, (int *)arg);
377 case LL_IOC_SETFLAGS:
378 case LL_IOC_CLRFLAGS:
379 /* Set or clear specific file flags */
380 /* XXX This probably needs checks to ensure the flags are
381 * not abused, and to handle any flag side effects.
383 if (get_user(flags, (int *) arg))
386 if (cmd == LL_IOC_SETFLAGS)
387 fd->fd_flags |= flags;
389 fd->fd_flags &= ~flags;
392 /* We need to special case any other ioctls we want to handle,
393 * to send them to the MDS/OST as appropriate and to properly
394 * network encode the arg field.
395 case EXT2_IOC_GETFLAGS:
396 case EXT2_IOC_SETFLAGS:
397 case EXT2_IOC_GETVERSION_OLD:
398 case EXT2_IOC_GETVERSION_NEW:
399 case EXT2_IOC_SETVERSION_OLD:
400 case EXT2_IOC_SETVERSION_NEW:
407 /* XXX this does not need to do anything for data, it _does_ need to
409 int ll_fsync(struct file *file, struct dentry *dentry, int data)
414 struct file_operations ll_file_operations = {
416 write: ll_file_write,
417 ioctl: ll_file_ioctl,
419 release: ll_file_release,
420 mmap: generic_file_mmap,
424 struct inode_operations ll_file_inode_operations = {
425 truncate: ll_truncate,