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_SIZE; /* inode->i_blksize */
22 const __u32 blockbits = PAGE_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,
83 readahead_gfp_mask(mapping))) {
84 ret = read_one_page(page);
85 gossip_debug(GOSSIP_INODE_DEBUG,
86 "failure adding page to cache, read_one_page returned: %d\n",
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(struct kiocb *iocb,
129 struct iov_iter *iter)
131 gossip_debug(GOSSIP_INODE_DEBUG,
132 "orangefs_direct_IO: %pD\n",
138 struct backing_dev_info orangefs_backing_dev_info = {
141 .capabilities = BDI_CAP_NO_ACCT_DIRTY | BDI_CAP_NO_WRITEBACK,
144 /** ORANGEFS2 implementation of address space operations */
145 const struct address_space_operations orangefs_address_operations = {
146 .readpage = orangefs_readpage,
147 .readpages = orangefs_readpages,
148 .invalidatepage = orangefs_invalidatepage,
149 .releasepage = orangefs_releasepage,
150 .direct_IO = orangefs_direct_IO,
153 static int orangefs_setattr_size(struct inode *inode, struct iattr *iattr)
155 struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
156 struct orangefs_kernel_op_s *new_op;
160 gossip_debug(GOSSIP_INODE_DEBUG,
161 "%s: %pU: Handle is %pU | fs_id %d | size is %llu\n",
163 get_khandle_from_ino(inode),
164 &orangefs_inode->refn.khandle,
165 orangefs_inode->refn.fs_id,
168 /* Ensure that we have a up to date size, so we know if it changed. */
169 ret = orangefs_inode_getattr(inode, 0, 1);
173 gossip_err("%s: orangefs_inode_getattr failed, ret:%d:.\n",
177 orig_size = i_size_read(inode);
179 truncate_setsize(inode, iattr->ia_size);
181 new_op = op_alloc(ORANGEFS_VFS_OP_TRUNCATE);
185 new_op->upcall.req.truncate.refn = orangefs_inode->refn;
186 new_op->upcall.req.truncate.size = (__s64) iattr->ia_size;
188 ret = service_operation(new_op, __func__,
189 get_interruptible_flag(inode));
192 * the truncate has no downcall members to retrieve, but
193 * the status value tells us if it went through ok or not
195 gossip_debug(GOSSIP_INODE_DEBUG,
196 "orangefs: orangefs_truncate got return value of %d\n",
204 if (orig_size != i_size_read(inode))
205 iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME;
211 * Change attributes of an object referenced by dentry.
213 int orangefs_setattr(struct dentry *dentry, struct iattr *iattr)
216 struct inode *inode = dentry->d_inode;
218 gossip_debug(GOSSIP_INODE_DEBUG,
219 "orangefs_setattr: called on %pd\n",
222 ret = setattr_prepare(dentry, iattr);
226 if (iattr->ia_valid & ATTR_SIZE) {
227 ret = orangefs_setattr_size(inode, iattr);
232 setattr_copy(inode, iattr);
233 mark_inode_dirty(inode);
235 ret = orangefs_inode_setattr(inode, iattr);
236 gossip_debug(GOSSIP_INODE_DEBUG,
237 "orangefs_setattr: inode_setattr returned %d\n",
240 if (!ret && (iattr->ia_valid & ATTR_MODE))
241 /* change mod on a file that has ACLs */
242 ret = posix_acl_chmod(inode, inode->i_mode);
245 gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_setattr: returning %d\n", ret);
250 * Obtain attributes of an object given a dentry
252 int orangefs_getattr(struct vfsmount *mnt,
253 struct dentry *dentry,
257 struct inode *inode = dentry->d_inode;
258 struct orangefs_inode_s *orangefs_inode = NULL;
260 gossip_debug(GOSSIP_INODE_DEBUG,
261 "orangefs_getattr: called on %pd\n",
264 ret = orangefs_inode_getattr(inode, 0, 0);
266 generic_fillattr(inode, kstat);
268 /* override block size reported to stat */
269 orangefs_inode = ORANGEFS_I(inode);
270 kstat->blksize = orangefs_inode->blksize;
275 int orangefs_permission(struct inode *inode, int mask)
279 if (mask & MAY_NOT_BLOCK)
282 gossip_debug(GOSSIP_INODE_DEBUG, "%s: refreshing\n", __func__);
284 /* Make sure the permission (and other common attrs) are up to date. */
285 ret = orangefs_inode_getattr(inode, 0, 0);
289 return generic_permission(inode, mask);
292 /* ORANGEDS2 implementation of VFS inode operations for files */
293 const struct inode_operations orangefs_file_inode_operations = {
294 .get_acl = orangefs_get_acl,
295 .set_acl = orangefs_set_acl,
296 .setattr = orangefs_setattr,
297 .getattr = orangefs_getattr,
298 .listxattr = orangefs_listxattr,
299 .permission = orangefs_permission,
302 static int orangefs_init_iops(struct inode *inode)
304 inode->i_mapping->a_ops = &orangefs_address_operations;
306 switch (inode->i_mode & S_IFMT) {
308 inode->i_op = &orangefs_file_inode_operations;
309 inode->i_fop = &orangefs_file_operations;
310 inode->i_blkbits = PAGE_SHIFT;
313 inode->i_op = &orangefs_symlink_inode_operations;
316 inode->i_op = &orangefs_dir_inode_operations;
317 inode->i_fop = &orangefs_dir_operations;
320 gossip_debug(GOSSIP_INODE_DEBUG,
321 "%s: unsupported mode\n",
330 * Given a ORANGEFS object identifier (fsid, handle), convert it into a ino_t type
331 * that will be used as a hash-index from where the handle will
332 * be searched for in the VFS hash table of inodes.
334 static inline ino_t orangefs_handle_hash(struct orangefs_object_kref *ref)
338 return orangefs_khandle_to_ino(&(ref->khandle));
342 * Called to set up an inode from iget5_locked.
344 static int orangefs_set_inode(struct inode *inode, void *data)
346 struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data;
347 ORANGEFS_I(inode)->refn.fs_id = ref->fs_id;
348 ORANGEFS_I(inode)->refn.khandle = ref->khandle;
353 * Called to determine if handles match.
355 static int orangefs_test_inode(struct inode *inode, void *data)
357 struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data;
358 struct orangefs_inode_s *orangefs_inode = NULL;
360 orangefs_inode = ORANGEFS_I(inode);
361 return (!ORANGEFS_khandle_cmp(&(orangefs_inode->refn.khandle), &(ref->khandle))
362 && orangefs_inode->refn.fs_id == ref->fs_id);
366 * Front-end to lookup the inode-cache maintained by the VFS using the ORANGEFS
369 * @sb: the file system super block instance.
370 * @ref: The ORANGEFS object for which we are trying to locate an inode structure.
372 struct inode *orangefs_iget(struct super_block *sb, struct orangefs_object_kref *ref)
374 struct inode *inode = NULL;
378 hash = orangefs_handle_hash(ref);
379 inode = iget5_locked(sb, hash, orangefs_test_inode, orangefs_set_inode, ref);
380 if (!inode || !(inode->i_state & I_NEW))
383 error = orangefs_inode_getattr(inode, 1, 1);
386 return ERR_PTR(error);
389 inode->i_ino = hash; /* needed for stat etc */
390 orangefs_init_iops(inode);
391 unlock_new_inode(inode);
393 gossip_debug(GOSSIP_INODE_DEBUG,
394 "iget handle %pU, fsid %d hash %ld i_ino %lu\n",
404 * Allocate an inode for a newly created file and insert it into the inode hash.
406 struct inode *orangefs_new_inode(struct super_block *sb, struct inode *dir,
407 int mode, dev_t dev, struct orangefs_object_kref *ref)
409 unsigned long hash = orangefs_handle_hash(ref);
413 gossip_debug(GOSSIP_INODE_DEBUG,
414 "%s:(sb is %p | MAJOR(dev)=%u | MINOR(dev)=%u mode=%o)\n",
421 inode = new_inode(sb);
425 orangefs_set_inode(inode, ref);
426 inode->i_ino = hash; /* needed for stat etc */
428 error = orangefs_inode_getattr(inode, 1, 1);
432 orangefs_init_iops(inode);
434 inode->i_mode = mode;
435 inode->i_uid = current_fsuid();
436 inode->i_gid = current_fsgid();
437 inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode);
438 inode->i_size = PAGE_SIZE;
441 error = insert_inode_locked4(inode, hash, orangefs_test_inode, ref);
445 gossip_debug(GOSSIP_INODE_DEBUG,
446 "Initializing ACL's for inode %pU\n",
447 get_khandle_from_ino(inode));
448 orangefs_init_acl(inode, dir);
453 return ERR_PTR(error);