2 * (C) 2001 Clemson University and The University of Chicago
4 * See COPYING in top-level directory.
8 * Linux VFS inode operations.
12 #include "orangefs-kernel.h"
13 #include "orangefs-bufmap.h"
15 static int read_one_page(struct page *page)
19 ssize_t bytes_read = 0;
20 struct inode *inode = page->mapping->host;
21 const __u32 blocksize = PAGE_CACHE_SIZE; /* inode->i_blksize */
22 const __u32 blockbits = PAGE_CACHE_SHIFT; /* inode->i_blkbits */
24 struct bio_vec bv = {.bv_page = page, .bv_len = PAGE_SIZE};
26 iov_iter_bvec(&to, ITER_BVEC | READ, &bv, 1, PAGE_SIZE);
28 gossip_debug(GOSSIP_INODE_DEBUG,
29 "orangefs_readpage called with page %p\n",
32 max_block = ((inode->i_size / blocksize) + 1);
34 if (page->index < max_block) {
35 loff_t blockptr_offset = (((loff_t) page->index) << blockbits);
37 bytes_read = orangefs_inode_read(inode,
42 /* this will only zero remaining unread portions of the page data */
43 iov_iter_zero(~0U, &to);
44 /* takes care of potential aliasing */
45 flush_dcache_page(page);
50 SetPageUptodate(page);
55 /* unlock the page after the ->readpage() routine completes */
60 static int orangefs_readpage(struct file *file, struct page *page)
62 return read_one_page(page);
65 static int orangefs_readpages(struct file *file,
66 struct address_space *mapping,
67 struct list_head *pages,
73 gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_readpages called\n");
75 for (page_idx = 0; page_idx < nr_pages; page_idx++) {
78 page = list_entry(pages->prev, struct page, lru);
80 if (!add_to_page_cache(page,
84 ret = read_one_page(page);
85 gossip_debug(GOSSIP_INODE_DEBUG,
86 "failure adding page to cache, read_one_page returned: %d\n",
89 page_cache_release(page);
92 BUG_ON(!list_empty(pages));
96 static void orangefs_invalidatepage(struct page *page,
100 gossip_debug(GOSSIP_INODE_DEBUG,
101 "orangefs_invalidatepage called on page %p "
106 ClearPageUptodate(page);
107 ClearPageMappedToDisk(page);
112 static int orangefs_releasepage(struct page *page, gfp_t foo)
114 gossip_debug(GOSSIP_INODE_DEBUG,
115 "orangefs_releasepage called on page %p\n",
121 * Having a direct_IO entry point in the address_space_operations
122 * struct causes the kernel to allows us to use O_DIRECT on
123 * open. Nothing will ever call this thing, but in the future we
124 * will need to be able to use O_DIRECT on open in order to support
125 * AIO. Modeled after NFS, they do this too.
128 * static ssize_t orangefs_direct_IO(int rw,
129 * struct kiocb *iocb,
130 * struct iov_iter *iter,
133 * gossip_debug(GOSSIP_INODE_DEBUG,
134 * "orangefs_direct_IO: %s\n",
135 * iocb->ki_filp->f_path.dentry->d_name.name);
141 struct backing_dev_info orangefs_backing_dev_info = {
144 .capabilities = BDI_CAP_NO_ACCT_DIRTY | BDI_CAP_NO_WRITEBACK,
147 /** ORANGEFS2 implementation of address space operations */
148 const struct address_space_operations orangefs_address_operations = {
149 .readpage = orangefs_readpage,
150 .readpages = orangefs_readpages,
151 .invalidatepage = orangefs_invalidatepage,
152 .releasepage = orangefs_releasepage,
153 /* .direct_IO = orangefs_direct_IO */
156 static int orangefs_setattr_size(struct inode *inode, struct iattr *iattr)
158 struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
159 struct orangefs_kernel_op_s *new_op;
163 gossip_debug(GOSSIP_INODE_DEBUG,
164 "%s: %pU: Handle is %pU | fs_id %d | size is %llu\n",
166 get_khandle_from_ino(inode),
167 &orangefs_inode->refn.khandle,
168 orangefs_inode->refn.fs_id,
171 /* Ensure that we have a up to date size, so we know if it changed. */
172 ret = orangefs_inode_getattr(inode, 0, 1);
176 gossip_err("%s: orangefs_inode_getattr failed, ret:%d:.\n",
180 orig_size = i_size_read(inode);
182 truncate_setsize(inode, iattr->ia_size);
184 new_op = op_alloc(ORANGEFS_VFS_OP_TRUNCATE);
188 new_op->upcall.req.truncate.refn = orangefs_inode->refn;
189 new_op->upcall.req.truncate.size = (__s64) iattr->ia_size;
191 ret = service_operation(new_op, __func__,
192 get_interruptible_flag(inode));
195 * the truncate has no downcall members to retrieve, but
196 * the status value tells us if it went through ok or not
198 gossip_debug(GOSSIP_INODE_DEBUG,
199 "orangefs: orangefs_truncate got return value of %d\n",
208 * Only change the c/mtime if we are changing the size or we are
209 * explicitly asked to change it. This handles the semantic difference
210 * between truncate() and ftruncate() as implemented in the VFS.
212 * The regular truncate() case without ATTR_CTIME and ATTR_MTIME is a
213 * special case where we need to update the times despite not having
214 * these flags set. For all other operations the VFS set these flags
215 * explicitly if it wants a timestamp update.
217 if (orig_size != i_size_read(inode) &&
218 !(iattr->ia_valid & (ATTR_CTIME | ATTR_MTIME))) {
219 iattr->ia_ctime = iattr->ia_mtime =
220 current_fs_time(inode->i_sb);
221 iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME;
228 * Change attributes of an object referenced by dentry.
230 int orangefs_setattr(struct dentry *dentry, struct iattr *iattr)
233 struct inode *inode = dentry->d_inode;
235 gossip_debug(GOSSIP_INODE_DEBUG,
236 "orangefs_setattr: called on %s\n",
237 dentry->d_name.name);
239 ret = inode_change_ok(inode, iattr);
243 if ((iattr->ia_valid & ATTR_SIZE) &&
244 iattr->ia_size != i_size_read(inode)) {
245 ret = orangefs_setattr_size(inode, iattr);
250 setattr_copy(inode, iattr);
251 mark_inode_dirty(inode);
253 ret = orangefs_inode_setattr(inode, iattr);
254 gossip_debug(GOSSIP_INODE_DEBUG,
255 "orangefs_setattr: inode_setattr returned %d\n",
258 if (!ret && (iattr->ia_valid & ATTR_MODE))
259 /* change mod on a file that has ACLs */
260 ret = posix_acl_chmod(inode, inode->i_mode);
263 gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_setattr: returning %d\n", ret);
268 * Obtain attributes of an object given a dentry
270 int orangefs_getattr(struct vfsmount *mnt,
271 struct dentry *dentry,
275 struct inode *inode = dentry->d_inode;
276 struct orangefs_inode_s *orangefs_inode = NULL;
278 gossip_debug(GOSSIP_INODE_DEBUG,
279 "orangefs_getattr: called on %s\n",
280 dentry->d_name.name);
282 ret = orangefs_inode_getattr(inode, 0, 1);
284 generic_fillattr(inode, kstat);
286 /* override block size reported to stat */
287 orangefs_inode = ORANGEFS_I(inode);
288 kstat->blksize = orangefs_inode->blksize;
293 int orangefs_permission(struct inode *inode, int mask)
297 if (mask & MAY_NOT_BLOCK)
300 gossip_debug(GOSSIP_INODE_DEBUG, "%s: refreshing\n", __func__);
302 /* Make sure the permission (and other common attrs) are up to date. */
303 ret = orangefs_inode_getattr(inode, 0, 0);
307 return generic_permission(inode, mask);
310 /* ORANGEDS2 implementation of VFS inode operations for files */
311 struct inode_operations orangefs_file_inode_operations = {
312 .get_acl = orangefs_get_acl,
313 .set_acl = orangefs_set_acl,
314 .setattr = orangefs_setattr,
315 .getattr = orangefs_getattr,
316 .setxattr = generic_setxattr,
317 .getxattr = generic_getxattr,
318 .listxattr = orangefs_listxattr,
319 .removexattr = generic_removexattr,
320 .permission = orangefs_permission,
323 static int orangefs_init_iops(struct inode *inode)
325 inode->i_mapping->a_ops = &orangefs_address_operations;
327 switch (inode->i_mode & S_IFMT) {
329 inode->i_op = &orangefs_file_inode_operations;
330 inode->i_fop = &orangefs_file_operations;
331 inode->i_blkbits = PAGE_CACHE_SHIFT;
334 inode->i_op = &orangefs_symlink_inode_operations;
337 inode->i_op = &orangefs_dir_inode_operations;
338 inode->i_fop = &orangefs_dir_operations;
341 gossip_debug(GOSSIP_INODE_DEBUG,
342 "%s: unsupported mode\n",
351 * Given a ORANGEFS object identifier (fsid, handle), convert it into a ino_t type
352 * that will be used as a hash-index from where the handle will
353 * be searched for in the VFS hash table of inodes.
355 static inline ino_t orangefs_handle_hash(struct orangefs_object_kref *ref)
359 return orangefs_khandle_to_ino(&(ref->khandle));
363 * Called to set up an inode from iget5_locked.
365 static int orangefs_set_inode(struct inode *inode, void *data)
367 struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data;
368 ORANGEFS_I(inode)->refn.fs_id = ref->fs_id;
369 ORANGEFS_I(inode)->refn.khandle = ref->khandle;
374 * Called to determine if handles match.
376 static int orangefs_test_inode(struct inode *inode, void *data)
378 struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data;
379 struct orangefs_inode_s *orangefs_inode = NULL;
381 orangefs_inode = ORANGEFS_I(inode);
382 return (!ORANGEFS_khandle_cmp(&(orangefs_inode->refn.khandle), &(ref->khandle))
383 && orangefs_inode->refn.fs_id == ref->fs_id);
387 * Front-end to lookup the inode-cache maintained by the VFS using the ORANGEFS
390 * @sb: the file system super block instance.
391 * @ref: The ORANGEFS object for which we are trying to locate an inode structure.
393 struct inode *orangefs_iget(struct super_block *sb, struct orangefs_object_kref *ref)
395 struct inode *inode = NULL;
399 hash = orangefs_handle_hash(ref);
400 inode = iget5_locked(sb, hash, orangefs_test_inode, orangefs_set_inode, ref);
401 if (!inode || !(inode->i_state & I_NEW))
404 error = orangefs_inode_getattr(inode, 1, 0);
407 return ERR_PTR(error);
410 inode->i_ino = hash; /* needed for stat etc */
411 orangefs_init_iops(inode);
412 unlock_new_inode(inode);
414 gossip_debug(GOSSIP_INODE_DEBUG,
415 "iget handle %pU, fsid %d hash %ld i_ino %lu\n",
425 * Allocate an inode for a newly created file and insert it into the inode hash.
427 struct inode *orangefs_new_inode(struct super_block *sb, struct inode *dir,
428 int mode, dev_t dev, struct orangefs_object_kref *ref)
430 unsigned long hash = orangefs_handle_hash(ref);
434 gossip_debug(GOSSIP_INODE_DEBUG,
435 "%s:(sb is %p | MAJOR(dev)=%u | MINOR(dev)=%u mode=%o)\n",
442 inode = new_inode(sb);
446 orangefs_set_inode(inode, ref);
447 inode->i_ino = hash; /* needed for stat etc */
449 error = orangefs_inode_getattr(inode, 1, 0);
453 orangefs_init_iops(inode);
455 inode->i_mode = mode;
456 inode->i_uid = current_fsuid();
457 inode->i_gid = current_fsgid();
458 inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
459 inode->i_size = PAGE_CACHE_SIZE;
462 error = insert_inode_locked4(inode, hash, orangefs_test_inode, ref);
466 gossip_debug(GOSSIP_INODE_DEBUG,
467 "Initializing ACL's for inode %pU\n",
468 get_khandle_from_ino(inode));
469 orangefs_init_acl(inode, dir);
474 return ERR_PTR(error);