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 || lli->lli_smd->lmd_object_id == 0) {
52 struct mdc_obd *mdc = sbi2mdc(ll_s2sbi(inode->i_sb));
53 struct inode * inode = file->f_dentry->d_inode;
60 oa->o_valid = OBD_MD_FLMODE;
61 oa->o_mode = S_IFREG | 0600;
62 oa->o_easize = mdc->mdc_max_mdsize;
63 rc = obd_create(ll_i2obdconn(inode), oa, &lli->lli_smd);
67 lli->lli_flags &= ~OBD_FL_CREATEONOPEN;
70 fd = kmem_cache_alloc(ll_file_data_slab, SLAB_KERNEL);
72 GOTO(out, rc = -ENOMEM);
73 memset(fd, 0, sizeof(*fd));
75 rc = mdc_open(&sbi->ll_mdc_conn, inode->i_ino, S_IFREG | inode->i_mode,
77 (__u64)(unsigned long)file, &fd->fd_mdshandle, &req);
79 ptlrpc_req_finished(req);
81 GOTO(out_req, -abs(rc));
82 if (!fd->fd_mdshandle) {
83 CERROR("mdc_open didn't assign fd_mdshandle\n");
84 /* XXX handle this how, abort or is it non-fatal? */
86 if (!fd->fd_mdshandle)
87 CERROR("mdc_open didn't assign fd_mdshandle\n");
92 GOTO(out_mdc, rc = -EINVAL);
94 oa->o_id = lli->lli_smd->lmd_object_id;
95 oa->o_mode = S_IFREG | inode->i_mode;
96 rc = obd_open(ll_i2obdconn(inode), oa, lli->lli_smd);
101 GOTO(out_mdc, rc = -abs(rc));
103 file->private_data = fd;
109 mdc_close(&sbi->ll_mdc_conn, inode->i_ino,
110 S_IFREG, fd->fd_mdshandle, &req);
112 ptlrpc_free_req(req);
116 kmem_cache_free(ll_file_data_slab, fd);
117 file->private_data = NULL;
122 static int ll_file_release(struct inode *inode, struct file *file)
125 struct ptlrpc_request *req = NULL;
126 struct ll_file_data *fd;
128 struct ll_sb_info *sbi = ll_i2sbi(inode);
129 struct ll_inode_info *lli = ll_i2info(inode);
133 fd = (struct ll_file_data *)file->private_data;
134 if (!fd || !fd->fd_mdshandle) {
136 GOTO(out, rc = -EINVAL);
142 GOTO(out_fd, rc = -ENOENT);
144 rc = obd_close(ll_i2obdconn(inode), oa, lli->lli_smd);
147 GOTO(out_fd, abs(rc));
149 if (file->f_mode & FMODE_WRITE) {
151 attr.ia_valid = ATTR_MTIME | ATTR_CTIME | ATTR_ATIME | ATTR_SIZE;
152 attr.ia_mtime = inode->i_mtime;
153 attr.ia_ctime = inode->i_ctime;
154 attr.ia_atime = inode->i_atime;
155 attr.ia_size = inode->i_size;
157 /* XXX: this introduces a small race that we should evaluate */
158 rc = ll_inode_setattr(inode, &attr, 0);
160 CERROR("failed - %d.\n", rc);
161 rc = -EIO; /* XXX - GOTO(out)? -phil */
165 rc = mdc_close(&sbi->ll_mdc_conn, inode->i_ino,
166 S_IFREG, fd->fd_mdshandle, &req);
167 ptlrpc_req_finished(req);
173 ptlrpc_free_req(fd->fd_req);
178 kmem_cache_free(ll_file_data_slab, fd);
179 file->private_data = NULL;
185 static inline void ll_remove_suid(struct inode *inode)
189 /* set S_IGID if S_IXGRP is set, and always set S_ISUID */
190 mode = (inode->i_mode & S_IXGRP)*(S_ISGID/S_IXGRP) | S_ISUID;
192 /* was any of the uid bits set? */
193 mode &= inode->i_mode;
194 if (mode && !capable(CAP_FSETID)) {
195 inode->i_mode &= ~mode;
196 // XXX careful here - we cannot change the size
200 static void ll_update_atime(struct inode *inode)
204 attr.ia_atime = CURRENT_TIME;
205 attr.ia_valid = ATTR_ATIME;
207 if (inode->i_atime == attr.ia_atime) return;
208 if (IS_RDONLY(inode)) return;
209 if (IS_NOATIME(inode)) return;
211 /* ll_inode_setattr() sets inode->i_atime from attr.ia_atime */
212 ll_inode_setattr(inode, &attr, 0);
215 static int ll_lock_callback(struct lustre_handle *lockh,
216 struct ldlm_lock_desc *new,
217 void *data, __u32 data_len,
218 struct ptlrpc_request **reqp)
220 struct inode *inode = data;
224 /* Completion AST. Do nothing. */
228 if (data_len != sizeof(struct inode))
231 /* FIXME: do something better than throwing away everything */
235 CDEBUG(D_INODE, "invalidating obdo/inode %ld\n", inode->i_ino);
236 invalidate_inode_pages(inode);
239 if (ldlm_cli_cancel(lockh) < 0)
244 static ssize_t ll_file_read(struct file *filp, char *buf, size_t count,
247 struct ll_file_data *fd = (struct ll_file_data *)filp->private_data;
248 struct inode *inode = filp->f_dentry->d_inode;
249 struct ll_sb_info *sbi = ll_i2sbi(inode);
250 struct ldlm_extent extent;
251 struct lustre_handle lockh;
252 __u64 res_id[RES_NAME_SIZE] = {inode->i_ino};
258 if (!(fd->fd_flags & LL_FILE_IGNORE_LOCK)) {
259 extent.start = *ppos;
260 extent.end = *ppos + count;
261 CDEBUG(D_INFO, "Locking inode %ld, start %Lu end %Lu\n",
262 inode->i_ino, extent.start, extent.end);
264 err = obd_enqueue(&sbi->ll_osc_conn, NULL, res_id, LDLM_EXTENT,
265 &extent, sizeof(extent), LCK_PR, &flags,
266 ll_lock_callback, inode, sizeof(*inode),
269 CERROR("lock enqueue: err: %d\n", err);
270 ldlm_lock_dump((void *)(unsigned long)lockh.addr);
273 CDEBUG(D_INFO, "Reading inode %ld, %d bytes, offset %Ld\n",
274 inode->i_ino, count, *ppos);
275 retval = generic_file_read(filp, buf, count, ppos);
278 ll_update_atime(inode);
280 if (!(fd->fd_flags & LL_FILE_IGNORE_LOCK)) {
281 err = obd_cancel(&sbi->ll_osc_conn, LCK_PR, &lockh);
283 CERROR("lock cancel: err: %d\n", err);
290 * Write to a file (through the page cache).
293 ll_file_write(struct file *file, const char *buf, size_t count, loff_t *ppos)
295 struct ll_file_data *fd = (struct ll_file_data *)file->private_data;
296 struct inode *inode = file->f_dentry->d_inode;
297 struct ll_sb_info *sbi = ll_i2sbi(inode);
298 struct ldlm_extent extent;
299 struct lustre_handle lockh;
300 __u64 res_id[RES_NAME_SIZE] = {inode->i_ino};
306 if (!(fd->fd_flags & LL_FILE_IGNORE_LOCK)) {
307 /* FIXME: this should check whether O_APPEND is set and adjust
308 * extent.start accordingly */
309 extent.start = *ppos;
310 extent.end = *ppos + count;
311 CDEBUG(D_INFO, "Locking inode %ld, start %Lu end %Lu\n",
312 inode->i_ino, extent.start, extent.end);
314 err = obd_enqueue(&sbi->ll_osc_conn, NULL, res_id, LDLM_EXTENT,
315 &extent, sizeof(extent), LCK_PW, &flags,
316 ll_lock_callback, inode, sizeof(*inode),
319 CERROR("lock enqueue: err: %d\n", err);
320 ldlm_lock_dump((void *)(unsigned long)lockh.addr);
323 CDEBUG(D_INFO, "Writing inode %ld, %ld bytes, offset %Ld\n",
324 inode->i_ino, (long)count, *ppos);
326 retval = generic_file_write(file, buf, count, ppos);
328 if (!(fd->fd_flags & LL_FILE_IGNORE_LOCK)) {
329 err = obd_cancel(&sbi->ll_osc_conn, LCK_PW, &lockh);
331 CERROR("lock cancel: err: %d\n", err);
337 int ll_file_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
340 struct ll_file_data *fd = (struct ll_file_data *)file->private_data;
344 case LL_IOC_GETFLAGS:
345 /* Get the current value of the file flags */
346 return put_user(fd->fd_flags, (int *)arg);
347 case LL_IOC_SETFLAGS:
348 case LL_IOC_CLRFLAGS:
349 /* Set or clear specific file flags */
350 /* XXX This probably needs checks to ensure the flags are
351 * not abused, and to handle any flag side effects.
353 if (get_user(flags, (int *) arg))
356 if (cmd == LL_IOC_SETFLAGS)
357 fd->fd_flags |= flags;
359 fd->fd_flags &= ~flags;
362 /* We need to special case any other ioctls we want to handle,
363 * to send them to the MDS/OST as appropriate and to properly
364 * network encode the arg field.
365 case EXT2_IOC_GETFLAGS:
366 case EXT2_IOC_SETFLAGS:
367 case EXT2_IOC_GETVERSION_OLD:
368 case EXT2_IOC_GETVERSION_NEW:
369 case EXT2_IOC_SETVERSION_OLD:
370 case EXT2_IOC_SETVERSION_NEW:
377 /* XXX this does not need to do anything for data, it _does_ need to
379 int ll_fsync(struct file *file, struct dentry *dentry, int data)
384 struct file_operations ll_file_operations = {
386 write: ll_file_write,
387 ioctl: ll_file_ioctl,
389 release: ll_file_release,
390 mmap: generic_file_mmap,
394 struct inode_operations ll_file_inode_operations = {
395 truncate: ll_truncate,