1 // SPDX-License-Identifier: GPL-2.0
3 * (C) 2001 Clemson University and The University of Chicago
5 * See COPYING in top-level directory.
9 * Linux VFS inode operations.
12 #include <linux/bvec.h>
14 #include "orangefs-kernel.h"
15 #include "orangefs-bufmap.h"
17 static int read_one_page(struct page *page)
21 ssize_t bytes_read = 0;
22 struct inode *inode = page->mapping->host;
23 const __u32 blocksize = PAGE_SIZE;
24 const __u32 blockbits = PAGE_SHIFT;
26 struct bio_vec bv = {.bv_page = page, .bv_len = PAGE_SIZE};
28 iov_iter_bvec(&to, READ, &bv, 1, PAGE_SIZE);
30 gossip_debug(GOSSIP_INODE_DEBUG,
31 "orangefs_readpage called with page %p\n",
34 max_block = ((inode->i_size / blocksize) + 1);
36 if (page->index < max_block) {
37 loff_t blockptr_offset = (((loff_t) page->index) << blockbits);
39 bytes_read = orangefs_inode_read(inode,
44 /* this will only zero remaining unread portions of the page data */
45 iov_iter_zero(~0U, &to);
46 /* takes care of potential aliasing */
47 flush_dcache_page(page);
52 SetPageUptodate(page);
57 /* unlock the page after the ->readpage() routine completes */
62 static int orangefs_readpage(struct file *file, struct page *page)
64 return read_one_page(page);
67 static int orangefs_readpages(struct file *file,
68 struct address_space *mapping,
69 struct list_head *pages,
75 gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_readpages called\n");
77 for (page_idx = 0; page_idx < nr_pages; page_idx++) {
80 page = lru_to_page(pages);
82 if (!add_to_page_cache(page,
85 readahead_gfp_mask(mapping))) {
86 ret = read_one_page(page);
87 gossip_debug(GOSSIP_INODE_DEBUG,
88 "failure adding page to cache, read_one_page returned: %d\n",
94 BUG_ON(!list_empty(pages));
98 static void orangefs_invalidatepage(struct page *page,
102 gossip_debug(GOSSIP_INODE_DEBUG,
103 "orangefs_invalidatepage called on page %p "
108 ClearPageUptodate(page);
109 ClearPageMappedToDisk(page);
114 static int orangefs_releasepage(struct page *page, gfp_t foo)
116 gossip_debug(GOSSIP_INODE_DEBUG,
117 "orangefs_releasepage called on page %p\n",
123 * Having a direct_IO entry point in the address_space_operations
124 * struct causes the kernel to allows us to use O_DIRECT on
125 * open. Nothing will ever call this thing, but in the future we
126 * will need to be able to use O_DIRECT on open in order to support
127 * AIO. Modeled after NFS, they do this too.
130 static ssize_t orangefs_direct_IO(struct kiocb *iocb,
131 struct iov_iter *iter)
133 gossip_debug(GOSSIP_INODE_DEBUG,
134 "orangefs_direct_IO: %pD\n",
140 /** ORANGEFS2 implementation of address space operations */
141 static const struct address_space_operations orangefs_address_operations = {
142 .readpage = orangefs_readpage,
143 .readpages = orangefs_readpages,
144 .invalidatepage = orangefs_invalidatepage,
145 .releasepage = orangefs_releasepage,
146 .direct_IO = orangefs_direct_IO,
149 static int orangefs_setattr_size(struct inode *inode, struct iattr *iattr)
151 struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
152 struct orangefs_kernel_op_s *new_op;
156 gossip_debug(GOSSIP_INODE_DEBUG,
157 "%s: %pU: Handle is %pU | fs_id %d | size is %llu\n",
159 get_khandle_from_ino(inode),
160 &orangefs_inode->refn.khandle,
161 orangefs_inode->refn.fs_id,
164 /* Ensure that we have a up to date size, so we know if it changed. */
165 ret = orangefs_inode_getattr(inode, 0, 1, STATX_SIZE);
169 gossip_err("%s: orangefs_inode_getattr failed, ret:%d:.\n",
173 orig_size = i_size_read(inode);
175 truncate_setsize(inode, iattr->ia_size);
177 new_op = op_alloc(ORANGEFS_VFS_OP_TRUNCATE);
181 new_op->upcall.req.truncate.refn = orangefs_inode->refn;
182 new_op->upcall.req.truncate.size = (__s64) iattr->ia_size;
184 ret = service_operation(new_op,
186 get_interruptible_flag(inode));
189 * the truncate has no downcall members to retrieve, but
190 * the status value tells us if it went through ok or not
192 gossip_debug(GOSSIP_INODE_DEBUG, "%s: ret:%d:\n", __func__, ret);
199 if (orig_size != i_size_read(inode))
200 iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME;
206 * Change attributes of an object referenced by dentry.
208 int orangefs_setattr(struct dentry *dentry, struct iattr *iattr)
211 struct inode *inode = dentry->d_inode;
213 gossip_debug(GOSSIP_INODE_DEBUG,
214 "%s: called on %pd\n",
218 ret = setattr_prepare(dentry, iattr);
222 if (iattr->ia_valid & ATTR_SIZE) {
223 ret = orangefs_setattr_size(inode, iattr);
228 setattr_copy(inode, iattr);
229 mark_inode_dirty(inode);
231 ret = orangefs_inode_setattr(inode, iattr);
232 gossip_debug(GOSSIP_INODE_DEBUG,
233 "%s: orangefs_inode_setattr returned %d\n",
237 if (!ret && (iattr->ia_valid & ATTR_MODE))
238 /* change mod on a file that has ACLs */
239 ret = posix_acl_chmod(inode, inode->i_mode);
242 gossip_debug(GOSSIP_INODE_DEBUG, "%s: ret:%d:\n", __func__, ret);
247 * Obtain attributes of an object given a dentry
249 int orangefs_getattr(const struct path *path, struct kstat *stat,
250 u32 request_mask, unsigned int flags)
253 struct inode *inode = path->dentry->d_inode;
255 gossip_debug(GOSSIP_INODE_DEBUG,
256 "orangefs_getattr: called on %pd\n",
259 ret = orangefs_inode_getattr(inode, 0, 0, request_mask);
261 generic_fillattr(inode, stat);
263 /* override block size reported to stat */
264 if (!(request_mask & STATX_SIZE))
265 stat->result_mask &= ~STATX_SIZE;
267 stat->attributes_mask = STATX_ATTR_IMMUTABLE |
269 if (inode->i_flags & S_IMMUTABLE)
270 stat->attributes |= STATX_ATTR_IMMUTABLE;
271 if (inode->i_flags & S_APPEND)
272 stat->attributes |= STATX_ATTR_APPEND;
277 int orangefs_permission(struct inode *inode, int mask)
281 if (mask & MAY_NOT_BLOCK)
284 gossip_debug(GOSSIP_INODE_DEBUG, "%s: refreshing\n", __func__);
286 /* Make sure the permission (and other common attrs) are up to date. */
287 ret = orangefs_inode_getattr(inode, 0, 0, STATX_MODE);
291 return generic_permission(inode, mask);
294 int orangefs_update_time(struct inode *inode, struct timespec64 *time, int flags)
297 gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_update_time: %pU\n",
298 get_khandle_from_ino(inode));
299 generic_update_time(inode, time, flags);
300 memset(&iattr, 0, sizeof iattr);
302 iattr.ia_valid |= ATTR_ATIME;
304 iattr.ia_valid |= ATTR_CTIME;
306 iattr.ia_valid |= ATTR_MTIME;
307 return orangefs_inode_setattr(inode, &iattr);
310 /* ORANGEFS2 implementation of VFS inode operations for files */
311 static const 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 .listxattr = orangefs_listxattr,
317 .permission = orangefs_permission,
318 .update_time = orangefs_update_time,
321 static int orangefs_init_iops(struct inode *inode)
323 inode->i_mapping->a_ops = &orangefs_address_operations;
325 switch (inode->i_mode & S_IFMT) {
327 inode->i_op = &orangefs_file_inode_operations;
328 inode->i_fop = &orangefs_file_operations;
331 inode->i_op = &orangefs_symlink_inode_operations;
334 inode->i_op = &orangefs_dir_inode_operations;
335 inode->i_fop = &orangefs_dir_operations;
338 gossip_debug(GOSSIP_INODE_DEBUG,
339 "%s: unsupported mode\n",
348 * Given an ORANGEFS object identifier (fsid, handle), convert it into
349 * a ino_t type that will be used as a hash-index from where the handle will
350 * be searched for in the VFS hash table of inodes.
352 static inline ino_t orangefs_handle_hash(struct orangefs_object_kref *ref)
356 return orangefs_khandle_to_ino(&(ref->khandle));
360 * Called to set up an inode from iget5_locked.
362 static int orangefs_set_inode(struct inode *inode, void *data)
364 struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data;
365 ORANGEFS_I(inode)->refn.fs_id = ref->fs_id;
366 ORANGEFS_I(inode)->refn.khandle = ref->khandle;
371 * Called to determine if handles match.
373 static int orangefs_test_inode(struct inode *inode, void *data)
375 struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data;
376 struct orangefs_inode_s *orangefs_inode = NULL;
378 orangefs_inode = ORANGEFS_I(inode);
379 /* test handles and fs_ids... */
380 return (!ORANGEFS_khandle_cmp(&(orangefs_inode->refn.khandle),
382 orangefs_inode->refn.fs_id == ref->fs_id);
386 * Front-end to lookup the inode-cache maintained by the VFS using the ORANGEFS
389 * @sb: the file system super block instance.
390 * @ref: The ORANGEFS object for which we are trying to locate an inode.
392 struct inode *orangefs_iget(struct super_block *sb,
393 struct orangefs_object_kref *ref)
395 struct inode *inode = NULL;
399 hash = orangefs_handle_hash(ref);
400 inode = iget5_locked(sb,
407 return ERR_PTR(-ENOMEM);
409 if (!(inode->i_state & I_NEW))
412 error = orangefs_inode_getattr(inode, 1, 1, STATX_ALL);
415 return ERR_PTR(error);
418 inode->i_ino = hash; /* needed for stat etc */
419 orangefs_init_iops(inode);
420 unlock_new_inode(inode);
422 gossip_debug(GOSSIP_INODE_DEBUG,
423 "iget handle %pU, fsid %d hash %ld i_ino %lu\n",
433 * Allocate an inode for a newly created file and insert it into the inode hash.
435 struct inode *orangefs_new_inode(struct super_block *sb, struct inode *dir,
436 int mode, dev_t dev, struct orangefs_object_kref *ref)
438 unsigned long hash = orangefs_handle_hash(ref);
442 gossip_debug(GOSSIP_INODE_DEBUG,
443 "%s:(sb is %p | MAJOR(dev)=%u | MINOR(dev)=%u mode=%o)\n",
450 inode = new_inode(sb);
452 return ERR_PTR(-ENOMEM);
454 orangefs_set_inode(inode, ref);
455 inode->i_ino = hash; /* needed for stat etc */
457 error = orangefs_inode_getattr(inode, 1, 1, STATX_ALL);
461 orangefs_init_iops(inode);
463 inode->i_mode = mode;
464 inode->i_uid = current_fsuid();
465 inode->i_gid = current_fsgid();
466 inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode);
467 inode->i_size = PAGE_SIZE;
470 error = insert_inode_locked4(inode, hash, orangefs_test_inode, ref);
474 gossip_debug(GOSSIP_INODE_DEBUG,
475 "Initializing ACL's for inode %pU\n",
476 get_khandle_from_ino(inode));
477 orangefs_init_acl(inode, dir);
482 return ERR_PTR(error);