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);
72 up(&lli->lli_open_sem);
77 if (lli->lli_smd->lmd_object_id == 0)
79 up(&lli->lli_open_sem);
82 fd = kmem_cache_alloc(ll_file_data_slab, SLAB_KERNEL);
84 GOTO(out, rc = -ENOMEM);
85 memset(fd, 0, sizeof(*fd));
87 rc = mdc_open(&sbi->ll_mdc_conn, inode->i_ino, S_IFREG | inode->i_mode,
88 file->f_flags, md, (__u64)(unsigned long)file,
89 &fd->fd_mdshandle, &req);
91 ptlrpc_req_finished(req);
93 GOTO(out_req, -abs(rc));
94 if (!fd->fd_mdshandle) {
95 CERROR("mdc_open didn't assign fd_mdshandle\n");
96 /* XXX handle this how, abort or is it non-fatal? */
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 | OBD_MD_FLSIZE;
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 int ll_size_lock(struct inode *inode, struct lov_stripe_md *md, __u64 start,
131 int mode, struct lustre_handle **lockhs_p)
133 struct ll_sb_info *sbi = ll_i2sbi(inode);
134 struct ldlm_extent extent;
135 struct lustre_handle *lockhs = NULL;
138 OBD_ALLOC(lockhs, md->lmd_stripe_count * sizeof(*lockhs));
142 extent.start = start;
145 rc = obd_enqueue(&sbi->ll_osc_conn, md, NULL, LDLM_EXTENT, &extent,
146 sizeof(extent), mode, &flags, ll_lock_callback,
147 inode, sizeof(*inode), lockhs);
148 if (rc != ELDLM_OK) {
149 CERROR("lock enqueue: %d\n", rc);
150 OBD_FREE(lockhs, md->lmd_stripe_count * sizeof(*lockhs));
156 int ll_size_unlock(struct inode *inode, struct lov_stripe_md *md, int mode,
157 struct lustre_handle *lockhs)
159 struct ll_sb_info *sbi = ll_i2sbi(inode);
162 rc = obd_cancel(&sbi->ll_osc_conn, md, mode, lockhs);
163 if (rc != ELDLM_OK) {
164 CERROR("lock cancel: %d\n", rc);
168 OBD_FREE(lockhs, md->lmd_stripe_count * sizeof(*lockhs));
172 int ll_file_size(struct inode *inode, struct lov_stripe_md *md)
174 struct ll_sb_info *sbi = ll_i2sbi(inode);
175 struct lustre_handle *lockhs;
179 rc = ll_size_lock(inode, md, 0, LCK_PR, &lockhs);
180 if (rc != ELDLM_OK) {
181 CERROR("lock enqueue: %d\n", rc);
185 oa.o_id = md->lmd_object_id;
187 oa.o_valid = OBD_MD_FLID|OBD_MD_FLMODE|OBD_MD_FLSIZE|OBD_MD_FLBLOCKS;
188 rc = obd_getattr(&sbi->ll_osc_conn, &oa, md);
190 obdo_to_inode(inode, &oa, oa.o_valid);
192 err = ll_size_unlock(inode, md, LCK_PR, lockhs);
193 if (err != ELDLM_OK) {
194 CERROR("lock cancel: %d\n", err);
200 static int ll_file_release(struct inode *inode, struct file *file)
203 struct ptlrpc_request *req = NULL;
204 struct ll_file_data *fd;
206 struct ll_sb_info *sbi = ll_i2sbi(inode);
207 struct ll_inode_info *lli = ll_i2info(inode);
211 fd = (struct ll_file_data *)file->private_data;
212 if (!fd || !fd->fd_mdshandle) {
214 GOTO(out, rc = -EINVAL);
217 memset(&oa, 0, sizeof(oa));
218 oa.o_id = lli->lli_smd->lmd_object_id;
220 oa.o_valid = (OBD_MD_FLMODE | OBD_MD_FLID);
221 rc = obd_close(ll_i2obdconn(inode), &oa, lli->lli_smd);
223 GOTO(out_fd, abs(rc));
225 /* If this fails and we goto out_fd, the file size on the MDS is out of
226 * date. Is that a big deal? */
227 if (file->f_mode & FMODE_WRITE) {
228 struct lustre_handle *lockhs;
230 rc = ll_size_lock(inode, lli->lli_smd, 0, LCK_PR, &lockhs);
232 GOTO(out_fd, abs(rc));
234 oa.o_id = lli->lli_smd->lmd_object_id;
236 oa.o_valid = OBD_MD_FLID | OBD_MD_FLMODE | OBD_MD_FLSIZE |
238 rc = obd_getattr(&sbi->ll_osc_conn, &oa, lli->lli_smd);
241 attr.ia_valid = (ATTR_MTIME | ATTR_CTIME | ATTR_ATIME |
243 attr.ia_mtime = inode->i_mtime;
244 attr.ia_ctime = inode->i_ctime;
245 attr.ia_atime = inode->i_atime;
246 attr.ia_size = oa.o_size;
248 inode->i_blocks = oa.o_blocks;
250 /* XXX: this introduces a small race that we should
252 rc = ll_inode_setattr(inode, &attr, 0);
254 CERROR("failed - %d.\n", rc);
255 rc = -EIO; /* XXX - GOTO(out)? -phil */
258 rc = ll_size_unlock(inode, lli->lli_smd, LCK_PR, lockhs);
260 CERROR("lock cancel: %d\n", rc);
265 rc = mdc_close(&sbi->ll_mdc_conn, inode->i_ino,
266 S_IFREG, fd->fd_mdshandle, &req);
267 ptlrpc_req_finished(req);
273 ptlrpc_req_finished(fd->fd_req);
275 //ldlm_cli_cancel_unused();
280 kmem_cache_free(ll_file_data_slab, fd);
281 file->private_data = NULL;
287 static inline void ll_remove_suid(struct inode *inode)
291 /* set S_IGID if S_IXGRP is set, and always set S_ISUID */
292 mode = (inode->i_mode & S_IXGRP)*(S_ISGID/S_IXGRP) | S_ISUID;
294 /* was any of the uid bits set? */
295 mode &= inode->i_mode;
296 if (mode && !capable(CAP_FSETID)) {
297 inode->i_mode &= ~mode;
298 // XXX careful here - we cannot change the size
302 static void ll_update_atime(struct inode *inode)
306 attr.ia_atime = CURRENT_TIME;
307 attr.ia_valid = ATTR_ATIME;
309 if (inode->i_atime == attr.ia_atime) return;
310 if (IS_RDONLY(inode)) return;
311 if (IS_NOATIME(inode)) return;
313 /* ll_inode_setattr() sets inode->i_atime from attr.ia_atime */
314 ll_inode_setattr(inode, &attr, 0);
317 int ll_lock_callback(struct ldlm_lock *lock, struct ldlm_lock_desc *new,
318 void *data, __u32 data_len)
320 struct inode *inode = data;
321 struct lustre_handle lockh;
325 if (data_len != sizeof(struct inode))
331 CDEBUG(D_INODE, "invalidating obdo/inode %ld\n", inode->i_ino);
332 /* FIXME: do something better than throwing away everything */
333 invalidate_inode_pages(inode);
336 ldlm_lock2handle(lock, &lockh);
337 rc = ldlm_cli_cancel(&lockh);
339 CERROR("ldlm_cli_cancel failed: %d\n", rc);
343 static ssize_t ll_file_read(struct file *filp, char *buf, size_t count,
346 struct ll_file_data *fd = (struct ll_file_data *)filp->private_data;
347 struct inode *inode = filp->f_dentry->d_inode;
348 struct ll_sb_info *sbi = ll_i2sbi(inode);
349 struct ldlm_extent extent;
350 struct lustre_handle *lockhs = NULL;
351 struct lov_stripe_md *md = ll_i2info(inode)->lli_smd;
357 if (!(fd->fd_flags & LL_FILE_IGNORE_LOCK)) {
358 OBD_ALLOC(lockhs, md->lmd_stripe_count * sizeof(*lockhs));
362 extent.start = *ppos;
363 extent.end = *ppos + count;
364 CDEBUG(D_INFO, "Locking inode %ld, start %Lu end %Lu\n",
365 inode->i_ino, extent.start, extent.end);
367 err = obd_enqueue(&sbi->ll_osc_conn, md, NULL, LDLM_EXTENT,
368 &extent, sizeof(extent), LCK_PR, &flags,
369 ll_lock_callback, inode, sizeof(*inode),
371 if (err != ELDLM_OK) {
372 OBD_FREE(lockhs, md->lmd_stripe_count *sizeof(*lockhs));
373 CERROR("lock enqueue: err: %d\n", err);
378 CDEBUG(D_INFO, "Reading inode %ld, %d bytes, offset %Ld\n",
379 inode->i_ino, count, *ppos);
380 retval = generic_file_read(filp, buf, count, ppos);
383 ll_update_atime(inode);
385 if (!(fd->fd_flags & LL_FILE_IGNORE_LOCK)) {
386 err = obd_cancel(&sbi->ll_osc_conn, md, LCK_PR, lockhs);
387 if (err != ELDLM_OK) {
388 CERROR("lock cancel: err: %d\n", err);
394 OBD_FREE(lockhs, md->lmd_stripe_count * sizeof(*lockhs));
399 * Write to a file (through the page cache).
402 ll_file_write(struct file *file, const char *buf, size_t count, loff_t *ppos)
404 struct ll_file_data *fd = (struct ll_file_data *)file->private_data;
405 struct inode *inode = file->f_dentry->d_inode;
406 struct ll_sb_info *sbi = ll_i2sbi(inode);
407 struct ldlm_extent extent;
408 struct lustre_handle *lockhs = NULL, *eof_lockhs = NULL;
409 struct lov_stripe_md *md = ll_i2info(inode)->lli_smd;
415 if (!S_ISBLK(inode->i_mode) && file->f_flags & O_APPEND) {
417 err = ll_size_lock(inode, md, 0, LCK_PW, &eof_lockhs);
421 oa.o_id = md->lmd_object_id;
422 oa.o_mode = inode->i_mode;
423 oa.o_valid = OBD_MD_FLID | OBD_MD_FLMODE | OBD_MD_FLSIZE |
425 retval = obd_getattr(&sbi->ll_osc_conn, &oa, md);
427 GOTO(out_eof, retval);
430 obdo_to_inode(inode, &oa, oa.o_valid);
433 if (!(fd->fd_flags & LL_FILE_IGNORE_LOCK)) {
434 OBD_ALLOC(lockhs, md->lmd_stripe_count * sizeof(*lockhs));
436 GOTO(out_eof, retval = -ENOMEM);
437 extent.start = *ppos;
438 extent.end = *ppos + count;
439 CDEBUG(D_INFO, "Locking inode %ld, start %Lu end %Lu\n",
440 inode->i_ino, extent.start, extent.end);
442 err = obd_enqueue(&sbi->ll_osc_conn, md, NULL, LDLM_EXTENT,
443 &extent, sizeof(extent), LCK_PW, &flags,
444 ll_lock_callback, inode, sizeof(*inode),
446 if (err != ELDLM_OK) {
447 CERROR("lock enqueue: err: %d\n", err);
448 GOTO(out_free, retval = err);
452 CDEBUG(D_INFO, "Writing inode %ld, %ld bytes, offset %Ld\n",
453 inode->i_ino, (long)count, *ppos);
455 retval = generic_file_write(file, buf, count, ppos);
457 if (!(fd->fd_flags & LL_FILE_IGNORE_LOCK)) {
458 err = obd_cancel(&sbi->ll_osc_conn, md, LCK_PW, lockhs);
459 if (err != ELDLM_OK) {
460 CERROR("lock cancel: err: %d\n", err);
461 GOTO(out_free, retval = err);
468 OBD_FREE(lockhs, md->lmd_stripe_count * sizeof(*lockhs));
471 if (!S_ISBLK(inode->i_mode) && file->f_flags & O_APPEND) {
472 err = ll_size_unlock(inode, md, LCK_PW, eof_lockhs);
480 int ll_file_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
483 struct ll_file_data *fd = (struct ll_file_data *)file->private_data;
487 case LL_IOC_GETFLAGS:
488 /* Get the current value of the file flags */
489 return put_user(fd->fd_flags, (int *)arg);
490 case LL_IOC_SETFLAGS:
491 case LL_IOC_CLRFLAGS:
492 /* Set or clear specific file flags */
493 /* XXX This probably needs checks to ensure the flags are
494 * not abused, and to handle any flag side effects.
496 if (get_user(flags, (int *) arg))
499 if (cmd == LL_IOC_SETFLAGS)
500 fd->fd_flags |= flags;
502 fd->fd_flags &= ~flags;
505 /* We need to special case any other ioctls we want to handle,
506 * to send them to the MDS/OST as appropriate and to properly
507 * network encode the arg field.
508 case EXT2_IOC_GETFLAGS:
509 case EXT2_IOC_SETFLAGS:
510 case EXT2_IOC_GETVERSION_OLD:
511 case EXT2_IOC_GETVERSION_NEW:
512 case EXT2_IOC_SETVERSION_OLD:
513 case EXT2_IOC_SETVERSION_NEW:
520 loff_t ll_file_seek(struct file *file, loff_t offset, int origin)
522 struct inode *inode = file->f_dentry->d_inode;
528 struct ll_inode_info *lli = ll_i2info(inode);
530 retval = ll_file_size(inode, lli->lli_smd);
534 offset += inode->i_size;
538 offset += file->f_pos;
541 if (offset >= 0 && offset <= inode->i_sb->s_maxbytes) {
542 if (offset != file->f_pos) {
543 file->f_pos = offset;
545 file->f_version = ++event;
552 /* XXX this does not need to do anything for data, it _does_ need to
554 int ll_fsync(struct file *file, struct dentry *dentry, int data)
559 struct file_operations ll_file_operations = {
561 write: ll_file_write,
562 ioctl: ll_file_ioctl,
564 release: ll_file_release,
565 mmap: generic_file_mmap,
566 llseek: ll_file_seek,
570 struct inode_operations ll_file_inode_operations = {
571 truncate: ll_truncate,