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;
160 loff_t orig_size = i_size_read(inode);
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 truncate_setsize(inode, iattr->ia_size);
173 new_op = op_alloc(ORANGEFS_VFS_OP_TRUNCATE);
177 new_op->upcall.req.truncate.refn = orangefs_inode->refn;
178 new_op->upcall.req.truncate.size = (__s64) iattr->ia_size;
180 ret = service_operation(new_op, __func__,
181 get_interruptible_flag(inode));
184 * the truncate has no downcall members to retrieve, but
185 * the status value tells us if it went through ok or not
187 gossip_debug(GOSSIP_INODE_DEBUG,
188 "orangefs: orangefs_truncate got return value of %d\n",
197 * Only change the c/mtime if we are changing the size or we are
198 * explicitly asked to change it. This handles the semantic difference
199 * between truncate() and ftruncate() as implemented in the VFS.
201 * The regular truncate() case without ATTR_CTIME and ATTR_MTIME is a
202 * special case where we need to update the times despite not having
203 * these flags set. For all other operations the VFS set these flags
204 * explicitly if it wants a timestamp update.
206 if (orig_size != i_size_read(inode) &&
207 !(iattr->ia_valid & (ATTR_CTIME | ATTR_MTIME))) {
208 iattr->ia_ctime = iattr->ia_mtime =
209 current_fs_time(inode->i_sb);
210 iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME;
217 * Change attributes of an object referenced by dentry.
219 int orangefs_setattr(struct dentry *dentry, struct iattr *iattr)
222 struct inode *inode = dentry->d_inode;
224 gossip_debug(GOSSIP_INODE_DEBUG,
225 "orangefs_setattr: called on %s\n",
226 dentry->d_name.name);
228 ret = inode_change_ok(inode, iattr);
232 if ((iattr->ia_valid & ATTR_SIZE) &&
233 iattr->ia_size != i_size_read(inode)) {
234 ret = orangefs_setattr_size(inode, iattr);
239 setattr_copy(inode, iattr);
240 mark_inode_dirty(inode);
242 ret = orangefs_inode_setattr(inode, iattr);
243 gossip_debug(GOSSIP_INODE_DEBUG,
244 "orangefs_setattr: inode_setattr returned %d\n",
247 if (!ret && (iattr->ia_valid & ATTR_MODE))
248 /* change mod on a file that has ACLs */
249 ret = posix_acl_chmod(inode, inode->i_mode);
252 gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_setattr: returning %d\n", ret);
257 * Obtain attributes of an object given a dentry
259 int orangefs_getattr(struct vfsmount *mnt,
260 struct dentry *dentry,
264 struct inode *inode = dentry->d_inode;
265 struct orangefs_inode_s *orangefs_inode = NULL;
267 gossip_debug(GOSSIP_INODE_DEBUG,
268 "orangefs_getattr: called on %s\n",
269 dentry->d_name.name);
271 ret = orangefs_inode_getattr(inode, 0, 1);
273 generic_fillattr(inode, kstat);
275 /* override block size reported to stat */
276 orangefs_inode = ORANGEFS_I(inode);
277 kstat->blksize = orangefs_inode->blksize;
282 int orangefs_permission(struct inode *inode, int mask)
286 if (mask & MAY_NOT_BLOCK)
289 gossip_debug(GOSSIP_INODE_DEBUG, "%s: refreshing\n", __func__);
291 /* Make sure the permission (and other common attrs) are up to date. */
292 ret = orangefs_inode_getattr(inode, 0, 0);
296 return generic_permission(inode, mask);
299 /* ORANGEDS2 implementation of VFS inode operations for files */
300 struct inode_operations orangefs_file_inode_operations = {
301 .get_acl = orangefs_get_acl,
302 .set_acl = orangefs_set_acl,
303 .setattr = orangefs_setattr,
304 .getattr = orangefs_getattr,
305 .setxattr = generic_setxattr,
306 .getxattr = generic_getxattr,
307 .listxattr = orangefs_listxattr,
308 .removexattr = generic_removexattr,
309 .permission = orangefs_permission,
312 static int orangefs_init_iops(struct inode *inode)
314 inode->i_mapping->a_ops = &orangefs_address_operations;
316 switch (inode->i_mode & S_IFMT) {
318 inode->i_op = &orangefs_file_inode_operations;
319 inode->i_fop = &orangefs_file_operations;
320 inode->i_blkbits = PAGE_CACHE_SHIFT;
323 inode->i_op = &orangefs_symlink_inode_operations;
326 inode->i_op = &orangefs_dir_inode_operations;
327 inode->i_fop = &orangefs_dir_operations;
330 gossip_debug(GOSSIP_INODE_DEBUG,
331 "%s: unsupported mode\n",
340 * Given a ORANGEFS object identifier (fsid, handle), convert it into a ino_t type
341 * that will be used as a hash-index from where the handle will
342 * be searched for in the VFS hash table of inodes.
344 static inline ino_t orangefs_handle_hash(struct orangefs_object_kref *ref)
348 return orangefs_khandle_to_ino(&(ref->khandle));
352 * Called to set up an inode from iget5_locked.
354 static int orangefs_set_inode(struct inode *inode, void *data)
356 struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data;
357 ORANGEFS_I(inode)->refn.fs_id = ref->fs_id;
358 ORANGEFS_I(inode)->refn.khandle = ref->khandle;
363 * Called to determine if handles match.
365 static int orangefs_test_inode(struct inode *inode, void *data)
367 struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data;
368 struct orangefs_inode_s *orangefs_inode = NULL;
370 orangefs_inode = ORANGEFS_I(inode);
371 return (!ORANGEFS_khandle_cmp(&(orangefs_inode->refn.khandle), &(ref->khandle))
372 && orangefs_inode->refn.fs_id == ref->fs_id);
376 * Front-end to lookup the inode-cache maintained by the VFS using the ORANGEFS
379 * @sb: the file system super block instance.
380 * @ref: The ORANGEFS object for which we are trying to locate an inode structure.
382 struct inode *orangefs_iget(struct super_block *sb, struct orangefs_object_kref *ref)
384 struct inode *inode = NULL;
388 hash = orangefs_handle_hash(ref);
389 inode = iget5_locked(sb, hash, orangefs_test_inode, orangefs_set_inode, ref);
390 if (!inode || !(inode->i_state & I_NEW))
393 error = orangefs_inode_getattr(inode, 1, 0);
396 return ERR_PTR(error);
399 inode->i_ino = hash; /* needed for stat etc */
400 orangefs_init_iops(inode);
401 unlock_new_inode(inode);
403 gossip_debug(GOSSIP_INODE_DEBUG,
404 "iget handle %pU, fsid %d hash %ld i_ino %lu\n",
414 * Allocate an inode for a newly created file and insert it into the inode hash.
416 struct inode *orangefs_new_inode(struct super_block *sb, struct inode *dir,
417 int mode, dev_t dev, struct orangefs_object_kref *ref)
419 unsigned long hash = orangefs_handle_hash(ref);
423 gossip_debug(GOSSIP_INODE_DEBUG,
424 "%s:(sb is %p | MAJOR(dev)=%u | MINOR(dev)=%u mode=%o)\n",
431 inode = new_inode(sb);
435 orangefs_set_inode(inode, ref);
436 inode->i_ino = hash; /* needed for stat etc */
438 error = orangefs_inode_getattr(inode, 1, 0);
442 orangefs_init_iops(inode);
444 inode->i_mode = mode;
445 inode->i_uid = current_fsuid();
446 inode->i_gid = current_fsgid();
447 inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
448 inode->i_size = PAGE_CACHE_SIZE;
451 error = insert_inode_locked4(inode, hash, orangefs_test_inode, ref);
455 gossip_debug(GOSSIP_INODE_DEBUG,
456 "Initializing ACL's for inode %pU\n",
457 get_khandle_from_ino(inode));
458 orangefs_init_acl(inode, dir);
463 return ERR_PTR(error);