2 * (C) 2001 Clemson University and The University of Chicago
4 * See COPYING in top-level directory.
8 * Linux VFS inode operations.
11 #include <linux/bvec.h>
13 #include "orangefs-kernel.h"
14 #include "orangefs-bufmap.h"
16 static int read_one_page(struct page *page)
20 ssize_t bytes_read = 0;
21 struct inode *inode = page->mapping->host;
22 const __u32 blocksize = PAGE_SIZE; /* inode->i_blksize */
23 const __u32 blockbits = PAGE_SHIFT; /* inode->i_blkbits */
25 struct bio_vec bv = {.bv_page = page, .bv_len = PAGE_SIZE};
27 iov_iter_bvec(&to, ITER_BVEC | READ, &bv, 1, PAGE_SIZE);
29 gossip_debug(GOSSIP_INODE_DEBUG,
30 "orangefs_readpage called with page %p\n",
33 max_block = ((inode->i_size / blocksize) + 1);
35 if (page->index < max_block) {
36 loff_t blockptr_offset = (((loff_t) page->index) << blockbits);
38 bytes_read = orangefs_inode_read(inode,
43 /* this will only zero remaining unread portions of the page data */
44 iov_iter_zero(~0U, &to);
45 /* takes care of potential aliasing */
46 flush_dcache_page(page);
51 SetPageUptodate(page);
56 /* unlock the page after the ->readpage() routine completes */
61 static int orangefs_readpage(struct file *file, struct page *page)
63 return read_one_page(page);
66 static int orangefs_readpages(struct file *file,
67 struct address_space *mapping,
68 struct list_head *pages,
74 gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_readpages called\n");
76 for (page_idx = 0; page_idx < nr_pages; page_idx++) {
79 page = list_entry(pages->prev, struct page, lru);
81 if (!add_to_page_cache(page,
84 readahead_gfp_mask(mapping))) {
85 ret = read_one_page(page);
86 gossip_debug(GOSSIP_INODE_DEBUG,
87 "failure adding page to cache, read_one_page returned: %d\n",
93 BUG_ON(!list_empty(pages));
97 static void orangefs_invalidatepage(struct page *page,
101 gossip_debug(GOSSIP_INODE_DEBUG,
102 "orangefs_invalidatepage called on page %p "
107 ClearPageUptodate(page);
108 ClearPageMappedToDisk(page);
113 static int orangefs_releasepage(struct page *page, gfp_t foo)
115 gossip_debug(GOSSIP_INODE_DEBUG,
116 "orangefs_releasepage called on page %p\n",
122 * Having a direct_IO entry point in the address_space_operations
123 * struct causes the kernel to allows us to use O_DIRECT on
124 * open. Nothing will ever call this thing, but in the future we
125 * will need to be able to use O_DIRECT on open in order to support
126 * AIO. Modeled after NFS, they do this too.
129 static ssize_t orangefs_direct_IO(struct kiocb *iocb,
130 struct iov_iter *iter)
132 gossip_debug(GOSSIP_INODE_DEBUG,
133 "orangefs_direct_IO: %pD\n",
139 /** ORANGEFS2 implementation of address space operations */
140 const struct address_space_operations orangefs_address_operations = {
141 .readpage = orangefs_readpage,
142 .readpages = orangefs_readpages,
143 .invalidatepage = orangefs_invalidatepage,
144 .releasepage = orangefs_releasepage,
145 .direct_IO = orangefs_direct_IO,
148 static int orangefs_setattr_size(struct inode *inode, struct iattr *iattr)
150 struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
151 struct orangefs_kernel_op_s *new_op;
155 gossip_debug(GOSSIP_INODE_DEBUG,
156 "%s: %pU: Handle is %pU | fs_id %d | size is %llu\n",
158 get_khandle_from_ino(inode),
159 &orangefs_inode->refn.khandle,
160 orangefs_inode->refn.fs_id,
163 /* Ensure that we have a up to date size, so we know if it changed. */
164 ret = orangefs_inode_getattr(inode, 0, 1, STATX_SIZE);
168 gossip_err("%s: orangefs_inode_getattr failed, ret:%d:.\n",
172 orig_size = i_size_read(inode);
174 truncate_setsize(inode, iattr->ia_size);
176 new_op = op_alloc(ORANGEFS_VFS_OP_TRUNCATE);
180 new_op->upcall.req.truncate.refn = orangefs_inode->refn;
181 new_op->upcall.req.truncate.size = (__s64) iattr->ia_size;
183 ret = service_operation(new_op, __func__,
184 get_interruptible_flag(inode));
187 * the truncate has no downcall members to retrieve, but
188 * the status value tells us if it went through ok or not
190 gossip_debug(GOSSIP_INODE_DEBUG,
191 "orangefs: orangefs_truncate got return value of %d\n",
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 "orangefs_setattr: called on %pd\n",
217 ret = setattr_prepare(dentry, iattr);
221 if (iattr->ia_valid & ATTR_SIZE) {
222 ret = orangefs_setattr_size(inode, iattr);
227 setattr_copy(inode, iattr);
228 mark_inode_dirty(inode);
230 ret = orangefs_inode_setattr(inode, iattr);
231 gossip_debug(GOSSIP_INODE_DEBUG,
232 "orangefs_setattr: inode_setattr returned %d\n",
235 if (!ret && (iattr->ia_valid & ATTR_MODE))
236 /* change mod on a file that has ACLs */
237 ret = posix_acl_chmod(inode, inode->i_mode);
240 gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_setattr: returning %d\n", ret);
245 * Obtain attributes of an object given a dentry
247 int orangefs_getattr(const struct path *path, struct kstat *stat,
248 u32 request_mask, unsigned int flags)
251 struct inode *inode = path->dentry->d_inode;
252 struct orangefs_inode_s *orangefs_inode = NULL;
254 gossip_debug(GOSSIP_INODE_DEBUG,
255 "orangefs_getattr: called on %pd\n",
258 ret = orangefs_inode_getattr(inode, 0, 0, request_mask);
260 generic_fillattr(inode, stat);
262 /* override block size reported to stat */
263 orangefs_inode = ORANGEFS_I(inode);
264 stat->blksize = orangefs_inode->blksize;
266 if (request_mask & STATX_SIZE)
267 stat->result_mask = STATX_BASIC_STATS;
269 stat->result_mask = STATX_BASIC_STATS &
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, STATX_MODE);
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, STATX_ALL);
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, STATX_ALL);
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);