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Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -07001#include <linux/ceph/ceph_debug.h>
Sage Weil124e68e2009-10-06 11:31:08 -07002
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -07003#include <linux/module.h>
Sage Weil124e68e2009-10-06 11:31:08 -07004#include <linux/sched.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +09005#include <linux/slab.h>
Sage Weil124e68e2009-10-06 11:31:08 -07006#include <linux/file.h>
Sage Weil5ef50c32012-07-31 11:27:36 -07007#include <linux/mount.h>
Sage Weil124e68e2009-10-06 11:31:08 -07008#include <linux/namei.h>
9#include <linux/writeback.h>
Kent Overstreeta27bb332013-05-07 16:19:08 -070010#include <linux/aio.h>
Li Wangad7a60d2013-08-15 11:51:44 +080011#include <linux/falloc.h>
Sage Weil124e68e2009-10-06 11:31:08 -070012
13#include "super.h"
14#include "mds_client.h"
Milosz Tanski99ccbd22013-08-21 17:29:54 -040015#include "cache.h"
Sage Weil124e68e2009-10-06 11:31:08 -070016
17/*
18 * Ceph file operations
19 *
20 * Implement basic open/close functionality, and implement
21 * read/write.
22 *
23 * We implement three modes of file I/O:
24 * - buffered uses the generic_file_aio_{read,write} helpers
25 *
26 * - synchronous is used when there is multi-client read/write
27 * sharing, avoids the page cache, and synchronously waits for an
28 * ack from the OSD.
29 *
30 * - direct io takes the variant of the sync path that references
31 * user pages directly.
32 *
33 * fsync() flushes and waits on dirty pages, but just queues metadata
34 * for writeback: since the MDS can recover size and mtime there is no
35 * need to wait for MDS acknowledgement.
36 */
37
38
39/*
40 * Prepare an open request. Preallocate ceph_cap to avoid an
41 * inopportune ENOMEM later.
42 */
43static struct ceph_mds_request *
44prepare_open_request(struct super_block *sb, int flags, int create_mode)
45{
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -070046 struct ceph_fs_client *fsc = ceph_sb_to_client(sb);
47 struct ceph_mds_client *mdsc = fsc->mdsc;
Sage Weil124e68e2009-10-06 11:31:08 -070048 struct ceph_mds_request *req;
49 int want_auth = USE_ANY_MDS;
50 int op = (flags & O_CREAT) ? CEPH_MDS_OP_CREATE : CEPH_MDS_OP_OPEN;
51
52 if (flags & (O_WRONLY|O_RDWR|O_CREAT|O_TRUNC))
53 want_auth = USE_AUTH_MDS;
54
55 req = ceph_mdsc_create_request(mdsc, op, want_auth);
56 if (IS_ERR(req))
57 goto out;
58 req->r_fmode = ceph_flags_to_mode(flags);
59 req->r_args.open.flags = cpu_to_le32(flags);
60 req->r_args.open.mode = cpu_to_le32(create_mode);
Sage Weil124e68e2009-10-06 11:31:08 -070061out:
62 return req;
63}
64
65/*
66 * initialize private struct file data.
67 * if we fail, clean up by dropping fmode reference on the ceph_inode
68 */
69static int ceph_init_file(struct inode *inode, struct file *file, int fmode)
70{
71 struct ceph_file_info *cf;
72 int ret = 0;
Milosz Tanski99ccbd22013-08-21 17:29:54 -040073 struct ceph_inode_info *ci = ceph_inode(inode);
74 struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb);
75 struct ceph_mds_client *mdsc = fsc->mdsc;
Sage Weil124e68e2009-10-06 11:31:08 -070076
77 switch (inode->i_mode & S_IFMT) {
78 case S_IFREG:
Milosz Tanski99ccbd22013-08-21 17:29:54 -040079 /* First file open request creates the cookie, we want to keep
80 * this cookie around for the filetime of the inode as not to
81 * have to worry about fscache register / revoke / operation
82 * races.
83 *
84 * Also, if we know the operation is going to invalidate data
85 * (non readonly) just nuke the cache right away.
86 */
87 ceph_fscache_register_inode_cookie(mdsc->fsc, ci);
88 if ((fmode & CEPH_FILE_MODE_WR))
89 ceph_fscache_invalidate(inode);
Sage Weil124e68e2009-10-06 11:31:08 -070090 case S_IFDIR:
91 dout("init_file %p %p 0%o (regular)\n", inode, file,
92 inode->i_mode);
93 cf = kmem_cache_alloc(ceph_file_cachep, GFP_NOFS | __GFP_ZERO);
94 if (cf == NULL) {
95 ceph_put_fmode(ceph_inode(inode), fmode); /* clean up */
96 return -ENOMEM;
97 }
98 cf->fmode = fmode;
99 cf->next_offset = 2;
100 file->private_data = cf;
101 BUG_ON(inode->i_fop->release != ceph_release);
102 break;
103
104 case S_IFLNK:
105 dout("init_file %p %p 0%o (symlink)\n", inode, file,
106 inode->i_mode);
107 ceph_put_fmode(ceph_inode(inode), fmode); /* clean up */
108 break;
109
110 default:
111 dout("init_file %p %p 0%o (special)\n", inode, file,
112 inode->i_mode);
113 /*
114 * we need to drop the open ref now, since we don't
115 * have .release set to ceph_release.
116 */
117 ceph_put_fmode(ceph_inode(inode), fmode); /* clean up */
118 BUG_ON(inode->i_fop->release == ceph_release);
119
120 /* call the proper open fop */
121 ret = inode->i_fop->open(inode, file);
122 }
123 return ret;
124}
125
126/*
Sage Weil124e68e2009-10-06 11:31:08 -0700127 * If we already have the requisite capabilities, we can satisfy
128 * the open request locally (no need to request new caps from the
129 * MDS). We do, however, need to inform the MDS (asynchronously)
130 * if our wanted caps set expands.
131 */
132int ceph_open(struct inode *inode, struct file *file)
133{
134 struct ceph_inode_info *ci = ceph_inode(inode);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700135 struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb);
136 struct ceph_mds_client *mdsc = fsc->mdsc;
Sage Weil124e68e2009-10-06 11:31:08 -0700137 struct ceph_mds_request *req;
138 struct ceph_file_info *cf = file->private_data;
Sage Weil5f21c962011-07-26 11:30:29 -0700139 struct inode *parent_inode = NULL;
Sage Weil124e68e2009-10-06 11:31:08 -0700140 int err;
141 int flags, fmode, wanted;
142
143 if (cf) {
144 dout("open file %p is already opened\n", file);
145 return 0;
146 }
147
148 /* filter out O_CREAT|O_EXCL; vfs did that already. yuck. */
149 flags = file->f_flags & ~(O_CREAT|O_EXCL);
150 if (S_ISDIR(inode->i_mode))
151 flags = O_DIRECTORY; /* mds likes to know */
152
153 dout("open inode %p ino %llx.%llx file %p flags %d (%d)\n", inode,
154 ceph_vinop(inode), file, flags, file->f_flags);
155 fmode = ceph_flags_to_mode(flags);
156 wanted = ceph_caps_for_mode(fmode);
157
158 /* snapped files are read-only */
159 if (ceph_snap(inode) != CEPH_NOSNAP && (file->f_mode & FMODE_WRITE))
160 return -EROFS;
161
162 /* trivially open snapdir */
163 if (ceph_snap(inode) == CEPH_SNAPDIR) {
Sage Weilbe655592011-11-30 09:47:09 -0800164 spin_lock(&ci->i_ceph_lock);
Sage Weil124e68e2009-10-06 11:31:08 -0700165 __ceph_get_fmode(ci, fmode);
Sage Weilbe655592011-11-30 09:47:09 -0800166 spin_unlock(&ci->i_ceph_lock);
Sage Weil124e68e2009-10-06 11:31:08 -0700167 return ceph_init_file(inode, file, fmode);
168 }
169
170 /*
Sage Weil7421ab82010-11-07 09:07:15 -0800171 * No need to block if we have caps on the auth MDS (for
172 * write) or any MDS (for read). Update wanted set
Sage Weil124e68e2009-10-06 11:31:08 -0700173 * asynchronously.
174 */
Sage Weilbe655592011-11-30 09:47:09 -0800175 spin_lock(&ci->i_ceph_lock);
Sage Weil7421ab82010-11-07 09:07:15 -0800176 if (__ceph_is_any_real_caps(ci) &&
177 (((fmode & CEPH_FILE_MODE_WR) == 0) || ci->i_auth_cap)) {
Sage Weil124e68e2009-10-06 11:31:08 -0700178 int mds_wanted = __ceph_caps_mds_wanted(ci);
179 int issued = __ceph_caps_issued(ci, NULL);
180
181 dout("open %p fmode %d want %s issued %s using existing\n",
182 inode, fmode, ceph_cap_string(wanted),
183 ceph_cap_string(issued));
184 __ceph_get_fmode(ci, fmode);
Sage Weilbe655592011-11-30 09:47:09 -0800185 spin_unlock(&ci->i_ceph_lock);
Sage Weil124e68e2009-10-06 11:31:08 -0700186
187 /* adjust wanted? */
188 if ((issued & wanted) != wanted &&
189 (mds_wanted & wanted) != wanted &&
190 ceph_snap(inode) != CEPH_SNAPDIR)
191 ceph_check_caps(ci, 0, NULL);
192
193 return ceph_init_file(inode, file, fmode);
194 } else if (ceph_snap(inode) != CEPH_NOSNAP &&
195 (ci->i_snap_caps & wanted) == wanted) {
196 __ceph_get_fmode(ci, fmode);
Sage Weilbe655592011-11-30 09:47:09 -0800197 spin_unlock(&ci->i_ceph_lock);
Sage Weil124e68e2009-10-06 11:31:08 -0700198 return ceph_init_file(inode, file, fmode);
199 }
Milosz Tanski99ccbd22013-08-21 17:29:54 -0400200
Sage Weilbe655592011-11-30 09:47:09 -0800201 spin_unlock(&ci->i_ceph_lock);
Sage Weil124e68e2009-10-06 11:31:08 -0700202
203 dout("open fmode %d wants %s\n", fmode, ceph_cap_string(wanted));
204 req = prepare_open_request(inode->i_sb, flags, 0);
205 if (IS_ERR(req)) {
206 err = PTR_ERR(req);
207 goto out;
208 }
Sage Weil70b666c2011-05-27 09:24:26 -0700209 req->r_inode = inode;
210 ihold(inode);
Milosz Tanski99ccbd22013-08-21 17:29:54 -0400211
Sage Weil124e68e2009-10-06 11:31:08 -0700212 req->r_num_caps = 1;
Sage Weil752c8bd2013-02-05 13:52:29 -0800213 if (flags & O_CREAT)
Sage Weil5f21c962011-07-26 11:30:29 -0700214 parent_inode = ceph_get_dentry_parent_inode(file->f_dentry);
Sage Weil124e68e2009-10-06 11:31:08 -0700215 err = ceph_mdsc_do_request(mdsc, parent_inode, req);
Sage Weil5f21c962011-07-26 11:30:29 -0700216 iput(parent_inode);
Sage Weil124e68e2009-10-06 11:31:08 -0700217 if (!err)
218 err = ceph_init_file(inode, file, req->r_fmode);
219 ceph_mdsc_put_request(req);
220 dout("open result=%d on %llx.%llx\n", err, ceph_vinop(inode));
221out:
222 return err;
223}
224
225
226/*
Sage Weil5ef50c32012-07-31 11:27:36 -0700227 * Do a lookup + open with a single request. If we get a non-existent
228 * file or symlink, return 1 so the VFS can retry.
Sage Weil124e68e2009-10-06 11:31:08 -0700229 */
Sage Weil5ef50c32012-07-31 11:27:36 -0700230int ceph_atomic_open(struct inode *dir, struct dentry *dentry,
Al Viro30d90492012-06-22 12:40:19 +0400231 struct file *file, unsigned flags, umode_t mode,
Al Virod9585272012-06-22 12:39:14 +0400232 int *opened)
Sage Weil124e68e2009-10-06 11:31:08 -0700233{
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700234 struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb);
235 struct ceph_mds_client *mdsc = fsc->mdsc;
Sage Weil124e68e2009-10-06 11:31:08 -0700236 struct ceph_mds_request *req;
Sage Weil5ef50c32012-07-31 11:27:36 -0700237 struct dentry *dn;
Yan, Zhengb1ee94a2014-09-16 20:35:17 +0800238 struct ceph_acls_info acls = {};
Sage Weil124e68e2009-10-06 11:31:08 -0700239 int err;
Sage Weil124e68e2009-10-06 11:31:08 -0700240
Sage Weil5ef50c32012-07-31 11:27:36 -0700241 dout("atomic_open %p dentry %p '%.*s' %s flags %d mode 0%o\n",
242 dir, dentry, dentry->d_name.len, dentry->d_name.name,
243 d_unhashed(dentry) ? "unhashed" : "hashed", flags, mode);
244
245 if (dentry->d_name.len > NAME_MAX)
246 return -ENAMETOOLONG;
247
248 err = ceph_init_dentry(dentry);
249 if (err < 0)
250 return err;
Sage Weil124e68e2009-10-06 11:31:08 -0700251
Yan, Zhengb1ee94a2014-09-16 20:35:17 +0800252 if (flags & O_CREAT) {
253 err = ceph_pre_init_acls(dir, &mode, &acls);
254 if (err < 0)
255 return err;
256 }
257
Sage Weil124e68e2009-10-06 11:31:08 -0700258 /* do the open */
259 req = prepare_open_request(dir->i_sb, flags, mode);
Yan, Zhengb1ee94a2014-09-16 20:35:17 +0800260 if (IS_ERR(req)) {
261 err = PTR_ERR(req);
262 goto out_acl;
263 }
Sage Weil124e68e2009-10-06 11:31:08 -0700264 req->r_dentry = dget(dentry);
265 req->r_num_caps = 2;
266 if (flags & O_CREAT) {
267 req->r_dentry_drop = CEPH_CAP_FILE_SHARED;
268 req->r_dentry_unless = CEPH_CAP_FILE_EXCL;
Yan, Zhengb1ee94a2014-09-16 20:35:17 +0800269 if (acls.pagelist) {
270 req->r_pagelist = acls.pagelist;
271 acls.pagelist = NULL;
272 }
Sage Weil124e68e2009-10-06 11:31:08 -0700273 }
274 req->r_locked_dir = dir; /* caller holds dir->i_mutex */
Sage Weilacda7652011-07-26 11:27:48 -0700275 err = ceph_mdsc_do_request(mdsc,
276 (flags & (O_CREAT|O_TRUNC)) ? dir : NULL,
277 req);
Sam Lang79aec9842012-12-19 09:44:23 -1000278 if (err)
Yan, Zhengb1ee94a2014-09-16 20:35:17 +0800279 goto out_req;
Sam Lang79aec9842012-12-19 09:44:23 -1000280
Sage Weil468640e2011-07-26 11:28:11 -0700281 err = ceph_handle_snapdir(req, dentry, err);
Sage Weil5ef50c32012-07-31 11:27:36 -0700282 if (err == 0 && (flags & O_CREAT) && !req->r_reply_info.head->is_dentry)
Sage Weil124e68e2009-10-06 11:31:08 -0700283 err = ceph_handle_notrace_create(dir, dentry);
Sage Weil5ef50c32012-07-31 11:27:36 -0700284
285 if (d_unhashed(dentry)) {
286 dn = ceph_finish_lookup(req, dentry, err);
287 if (IS_ERR(dn))
288 err = PTR_ERR(dn);
289 } else {
290 /* we were given a hashed negative dentry */
291 dn = NULL;
292 }
Sage Weil468640e2011-07-26 11:28:11 -0700293 if (err)
Yan, Zhengb1ee94a2014-09-16 20:35:17 +0800294 goto out_req;
Sage Weil5ef50c32012-07-31 11:27:36 -0700295 if (dn || dentry->d_inode == NULL || S_ISLNK(dentry->d_inode->i_mode)) {
296 /* make vfs retry on splice, ENOENT, or symlink */
297 dout("atomic_open finish_no_open on dn %p\n", dn);
298 err = finish_no_open(file, dn);
299 } else {
300 dout("atomic_open finish_open on dn %p\n", dn);
Sam Lang6e8575f2012-12-28 09:56:46 -0800301 if (req->r_op == CEPH_MDS_OP_CREATE && req->r_reply_info.has_create_ino) {
Yan, Zhengb1ee94a2014-09-16 20:35:17 +0800302 ceph_init_inode_acls(dentry->d_inode, &acls);
Sam Lang6e8575f2012-12-28 09:56:46 -0800303 *opened |= FILE_CREATED;
304 }
Sage Weil5ef50c32012-07-31 11:27:36 -0700305 err = finish_open(file, dentry, ceph_open, opened);
306 }
Yan, Zhengb1ee94a2014-09-16 20:35:17 +0800307out_req:
Yan, Zhengab866542014-04-01 20:20:17 +0800308 if (!req->r_err && req->r_target_inode)
309 ceph_put_fmode(ceph_inode(req->r_target_inode), req->r_fmode);
Sage Weil124e68e2009-10-06 11:31:08 -0700310 ceph_mdsc_put_request(req);
Yan, Zhengb1ee94a2014-09-16 20:35:17 +0800311out_acl:
312 ceph_release_acls_info(&acls);
Sage Weil5ef50c32012-07-31 11:27:36 -0700313 dout("atomic_open result=%d\n", err);
Al Virod9585272012-06-22 12:39:14 +0400314 return err;
Sage Weil124e68e2009-10-06 11:31:08 -0700315}
316
317int ceph_release(struct inode *inode, struct file *file)
318{
319 struct ceph_inode_info *ci = ceph_inode(inode);
320 struct ceph_file_info *cf = file->private_data;
321
322 dout("release inode %p file %p\n", inode, file);
323 ceph_put_fmode(ci, cf->fmode);
324 if (cf->last_readdir)
325 ceph_mdsc_put_request(cf->last_readdir);
326 kfree(cf->last_name);
327 kfree(cf->dir_info);
328 dput(cf->dentry);
329 kmem_cache_free(ceph_file_cachep, cf);
Sage Weil195d3ce2010-03-01 09:57:54 -0800330
331 /* wake up anyone waiting for caps on this inode */
Yehuda Sadeh03066f22010-07-27 13:11:08 -0700332 wake_up_all(&ci->i_cap_wq);
Sage Weil124e68e2009-10-06 11:31:08 -0700333 return 0;
334}
335
Yan, Zheng83701242014-11-14 22:36:18 +0800336enum {
337 CHECK_EOF = 1,
338 READ_INLINE = 2,
339};
340
Sage Weil124e68e2009-10-06 11:31:08 -0700341/*
Sage Weil124e68e2009-10-06 11:31:08 -0700342 * Read a range of bytes striped over one or more objects. Iterate over
343 * objects we stripe over. (That's not atomic, but good enough for now.)
344 *
345 * If we get a short result from the OSD, check against i_size; we need to
346 * only return a short read to the caller if we hit EOF.
347 */
348static int striped_read(struct inode *inode,
349 u64 off, u64 len,
Sage Weil6a026582010-02-09 14:04:02 -0800350 struct page **pages, int num_pages,
Sage Weilc3cd6282011-06-01 16:08:44 -0700351 int *checkeof, bool o_direct,
Henry C Changab226e22010-12-15 20:41:54 -0800352 unsigned long buf_align)
Sage Weil124e68e2009-10-06 11:31:08 -0700353{
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700354 struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
Sage Weil124e68e2009-10-06 11:31:08 -0700355 struct ceph_inode_info *ci = ceph_inode(inode);
Dan Carpenter688bac42013-07-23 16:48:01 +0300356 u64 pos, this_len, left;
Sage Weilb7495fc2010-11-09 12:43:12 -0800357 int io_align, page_align;
Dan Carpenter688bac42013-07-23 16:48:01 +0300358 int pages_left;
Sage Weil124e68e2009-10-06 11:31:08 -0700359 int read;
360 struct page **page_pos;
361 int ret;
362 bool hit_stripe, was_short;
363
364 /*
365 * we may need to do multiple reads. not atomic, unfortunately.
366 */
367 pos = off;
368 left = len;
369 page_pos = pages;
370 pages_left = num_pages;
371 read = 0;
Sage Weilb7495fc2010-11-09 12:43:12 -0800372 io_align = off & ~PAGE_MASK;
Sage Weil124e68e2009-10-06 11:31:08 -0700373
374more:
Sage Weilc3cd6282011-06-01 16:08:44 -0700375 if (o_direct)
Henry C Changab226e22010-12-15 20:41:54 -0800376 page_align = (pos - io_align + buf_align) & ~PAGE_MASK;
Sage Weilb7495fc2010-11-09 12:43:12 -0800377 else
378 page_align = pos & ~PAGE_MASK;
Sage Weil124e68e2009-10-06 11:31:08 -0700379 this_len = left;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700380 ret = ceph_osdc_readpages(&fsc->client->osdc, ceph_vino(inode),
Sage Weil124e68e2009-10-06 11:31:08 -0700381 &ci->i_layout, pos, &this_len,
382 ci->i_truncate_seq,
383 ci->i_truncate_size,
Sage Weilb7495fc2010-11-09 12:43:12 -0800384 page_pos, pages_left, page_align);
Sage Weil124e68e2009-10-06 11:31:08 -0700385 if (ret == -ENOENT)
386 ret = 0;
Sage Weil0e987282011-06-07 20:40:35 -0700387 hit_stripe = this_len < left;
388 was_short = ret >= 0 && ret < this_len;
Dan Carpenter688bac42013-07-23 16:48:01 +0300389 dout("striped_read %llu~%llu (read %u) got %d%s%s\n", pos, left, read,
Sage Weil124e68e2009-10-06 11:31:08 -0700390 ret, hit_stripe ? " HITSTRIPE" : "", was_short ? " SHORT" : "");
391
majianpeng02ae66d2013-08-06 16:20:38 +0800392 if (ret >= 0) {
393 int didpages;
394 if (was_short && (pos + ret < inode->i_size)) {
395 u64 tmp = min(this_len - ret,
396 inode->i_size - pos - ret);
397 dout(" zero gap %llu to %llu\n",
398 pos + ret, pos + ret + tmp);
399 ceph_zero_page_vector_range(page_align + read + ret,
400 tmp, pages);
401 ret += tmp;
Sage Weil124e68e2009-10-06 11:31:08 -0700402 }
majianpeng02ae66d2013-08-06 16:20:38 +0800403
404 didpages = (page_align + ret) >> PAGE_CACHE_SHIFT;
Sage Weil124e68e2009-10-06 11:31:08 -0700405 pos += ret;
406 read = pos - off;
407 left -= ret;
408 page_pos += didpages;
409 pages_left -= didpages;
410
majianpeng02ae66d2013-08-06 16:20:38 +0800411 /* hit stripe and need continue*/
412 if (left && hit_stripe && pos < inode->i_size)
Sage Weil124e68e2009-10-06 11:31:08 -0700413 goto more;
414 }
415
majianpengee7289b2013-08-21 15:02:51 +0800416 if (read > 0) {
majianpeng02ae66d2013-08-06 16:20:38 +0800417 ret = read;
Sage Weilc3cd6282011-06-01 16:08:44 -0700418 /* did we bounce off eof? */
419 if (pos + left > inode->i_size)
Yan, Zheng83701242014-11-14 22:36:18 +0800420 *checkeof = CHECK_EOF;
Sage Weil124e68e2009-10-06 11:31:08 -0700421 }
422
Sage Weil124e68e2009-10-06 11:31:08 -0700423 dout("striped_read returns %d\n", ret);
424 return ret;
425}
426
427/*
428 * Completely synchronous read and write methods. Direct from __user
429 * buffer to osd, or directly to user pages (if O_DIRECT).
430 *
431 * If the read spans object boundary, just do multiple reads.
432 */
majianpeng8eb4efb2013-09-26 14:42:17 +0800433static ssize_t ceph_sync_read(struct kiocb *iocb, struct iov_iter *i,
434 int *checkeof)
Sage Weil124e68e2009-10-06 11:31:08 -0700435{
majianpeng8eb4efb2013-09-26 14:42:17 +0800436 struct file *file = iocb->ki_filp;
Al Viro496ad9a2013-01-23 17:07:38 -0500437 struct inode *inode = file_inode(file);
Sage Weil124e68e2009-10-06 11:31:08 -0700438 struct page **pages;
majianpeng8eb4efb2013-09-26 14:42:17 +0800439 u64 off = iocb->ki_pos;
Henry C Changab226e22010-12-15 20:41:54 -0800440 int num_pages, ret;
Al Viro2b777c92014-04-03 22:31:22 -0400441 size_t len = iov_iter_count(i);
Sage Weil124e68e2009-10-06 11:31:08 -0700442
majianpeng8eb4efb2013-09-26 14:42:17 +0800443 dout("sync_read on file %p %llu~%u %s\n", file, off,
444 (unsigned)len,
Sage Weil124e68e2009-10-06 11:31:08 -0700445 (file->f_flags & O_DIRECT) ? "O_DIRECT" : "");
Yan, Zhengd0d0db22014-07-21 10:15:48 +0800446
447 if (!len)
448 return 0;
Sage Weile98b6fe2010-11-09 12:24:53 -0800449 /*
450 * flush any page cache pages in this range. this
451 * will make concurrent normal and sync io slow,
452 * but it will at least behave sensibly when they are
453 * in sequence.
454 */
majianpeng8eb4efb2013-09-26 14:42:17 +0800455 ret = filemap_write_and_wait_range(inode->i_mapping, off,
456 off + len);
Yehuda Sadeh29065a52010-02-09 11:14:41 -0800457 if (ret < 0)
majianpeng8eb4efb2013-09-26 14:42:17 +0800458 return ret;
Yehuda Sadeh29065a52010-02-09 11:14:41 -0800459
majianpeng8eb4efb2013-09-26 14:42:17 +0800460 if (file->f_flags & O_DIRECT) {
461 while (iov_iter_count(i)) {
Al Viro2b777c92014-04-03 22:31:22 -0400462 size_t start;
463 ssize_t n;
Sage Weil124e68e2009-10-06 11:31:08 -0700464
Al Viro2b777c92014-04-03 22:31:22 -0400465 n = iov_iter_get_pages_alloc(i, &pages, INT_MAX, &start);
466 if (n < 0)
467 return n;
Sage Weil124e68e2009-10-06 11:31:08 -0700468
Al Viro2b777c92014-04-03 22:31:22 -0400469 num_pages = (n + start + PAGE_SIZE - 1) / PAGE_SIZE;
470
471 ret = striped_read(inode, off, n,
majianpeng8eb4efb2013-09-26 14:42:17 +0800472 pages, num_pages, checkeof,
Al Viro2b777c92014-04-03 22:31:22 -0400473 1, start);
474
majianpeng8eb4efb2013-09-26 14:42:17 +0800475 ceph_put_page_vector(pages, num_pages, true);
476
477 if (ret <= 0)
478 break;
479 off += ret;
480 iov_iter_advance(i, ret);
Al Viro2b777c92014-04-03 22:31:22 -0400481 if (ret < n)
majianpeng8eb4efb2013-09-26 14:42:17 +0800482 break;
483 }
484 } else {
485 num_pages = calc_pages_for(off, len);
486 pages = ceph_alloc_page_vector(num_pages, GFP_NOFS);
487 if (IS_ERR(pages))
488 return PTR_ERR(pages);
489 ret = striped_read(inode, off, len, pages,
490 num_pages, checkeof, 0, 0);
491 if (ret > 0) {
492 int l, k = 0;
Al Viro2b777c92014-04-03 22:31:22 -0400493 size_t left = ret;
majianpeng8eb4efb2013-09-26 14:42:17 +0800494
495 while (left) {
Yan, Zheng5aaa4322014-07-02 10:13:00 +0800496 size_t page_off = off & ~PAGE_MASK;
497 size_t copy = min_t(size_t,
498 PAGE_SIZE - page_off, left);
499 l = copy_page_to_iter(pages[k++], page_off,
500 copy, i);
Al Viro2b777c92014-04-03 22:31:22 -0400501 off += l;
502 left -= l;
503 if (l < copy)
majianpeng8eb4efb2013-09-26 14:42:17 +0800504 break;
505 }
506 }
Sage Weil124e68e2009-10-06 11:31:08 -0700507 ceph_release_page_vector(pages, num_pages);
majianpeng8eb4efb2013-09-26 14:42:17 +0800508 }
509
510 if (off > iocb->ki_pos) {
511 ret = off - iocb->ki_pos;
512 iocb->ki_pos = off;
513 }
514
Sage Weil124e68e2009-10-06 11:31:08 -0700515 dout("sync_read result %d\n", ret);
516 return ret;
517}
518
519/*
Alex Elder26be8802013-04-15 11:20:42 -0500520 * Write commit request unsafe callback, called to tell us when a
521 * request is unsafe (that is, in flight--has been handed to the
522 * messenger to send to its target osd). It is called again when
523 * we've received a response message indicating the request is
524 * "safe" (its CEPH_OSD_FLAG_ONDISK flag is set), or when a request
525 * is completed early (and unsuccessfully) due to a timeout or
526 * interrupt.
527 *
528 * This is used if we requested both an ACK and ONDISK commit reply
529 * from the OSD.
Sage Weil124e68e2009-10-06 11:31:08 -0700530 */
Alex Elder26be8802013-04-15 11:20:42 -0500531static void ceph_sync_write_unsafe(struct ceph_osd_request *req, bool unsafe)
Sage Weil124e68e2009-10-06 11:31:08 -0700532{
533 struct ceph_inode_info *ci = ceph_inode(req->r_inode);
534
Alex Elder26be8802013-04-15 11:20:42 -0500535 dout("%s %p tid %llu %ssafe\n", __func__, req, req->r_tid,
536 unsafe ? "un" : "");
537 if (unsafe) {
538 ceph_get_cap_refs(ci, CEPH_CAP_FILE_WR);
539 spin_lock(&ci->i_unsafe_lock);
540 list_add_tail(&req->r_unsafe_item,
541 &ci->i_unsafe_writes);
542 spin_unlock(&ci->i_unsafe_lock);
543 } else {
544 spin_lock(&ci->i_unsafe_lock);
545 list_del_init(&req->r_unsafe_item);
546 spin_unlock(&ci->i_unsafe_lock);
547 ceph_put_cap_refs(ci, CEPH_CAP_FILE_WR);
548 }
Sage Weil124e68e2009-10-06 11:31:08 -0700549}
550
majianpenge8344e62013-09-12 13:54:26 +0800551
Sage Weil124e68e2009-10-06 11:31:08 -0700552/*
majianpenge8344e62013-09-12 13:54:26 +0800553 * Synchronous write, straight from __user pointer or user pages.
Sage Weil124e68e2009-10-06 11:31:08 -0700554 *
555 * If write spans object boundary, just do multiple writes. (For a
556 * correct atomic write, we should e.g. take write locks on all
557 * objects, rollback on failure, etc.)
558 */
majianpenge8344e62013-09-12 13:54:26 +0800559static ssize_t
Yan, Zheng06fee302014-07-28 14:33:46 +0800560ceph_sync_direct_write(struct kiocb *iocb, struct iov_iter *from, loff_t pos)
Sage Weil124e68e2009-10-06 11:31:08 -0700561{
majianpenge8344e62013-09-12 13:54:26 +0800562 struct file *file = iocb->ki_filp;
Al Viro496ad9a2013-01-23 17:07:38 -0500563 struct inode *inode = file_inode(file);
Sage Weil124e68e2009-10-06 11:31:08 -0700564 struct ceph_inode_info *ci = ceph_inode(inode);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700565 struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
Alex Elderacead002013-03-14 14:09:05 -0500566 struct ceph_snap_context *snapc;
567 struct ceph_vino vino;
Sage Weil124e68e2009-10-06 11:31:08 -0700568 struct ceph_osd_request *req;
569 struct page **pages;
570 int num_pages;
Sage Weil124e68e2009-10-06 11:31:08 -0700571 int written = 0;
572 int flags;
Sage Weil124e68e2009-10-06 11:31:08 -0700573 int check_caps = 0;
574 int ret;
575 struct timespec mtime = CURRENT_TIME;
Al Viro4908b822014-04-03 23:09:01 -0400576 size_t count = iov_iter_count(from);
Sage Weil124e68e2009-10-06 11:31:08 -0700577
Al Viro496ad9a2013-01-23 17:07:38 -0500578 if (ceph_snap(file_inode(file)) != CEPH_NOSNAP)
Sage Weil124e68e2009-10-06 11:31:08 -0700579 return -EROFS;
580
majianpenge8344e62013-09-12 13:54:26 +0800581 dout("sync_direct_write on file %p %lld~%u\n", file, pos,
582 (unsigned)count);
Sage Weil124e68e2009-10-06 11:31:08 -0700583
majianpenge8344e62013-09-12 13:54:26 +0800584 ret = filemap_write_and_wait_range(inode->i_mapping, pos, pos + count);
Yehuda Sadeh29065a52010-02-09 11:14:41 -0800585 if (ret < 0)
586 return ret;
587
588 ret = invalidate_inode_pages2_range(inode->i_mapping,
589 pos >> PAGE_CACHE_SHIFT,
majianpenge8344e62013-09-12 13:54:26 +0800590 (pos + count) >> PAGE_CACHE_SHIFT);
Yehuda Sadeh29065a52010-02-09 11:14:41 -0800591 if (ret < 0)
592 dout("invalidate_inode_pages2_range returned %d\n", ret);
593
Sage Weil124e68e2009-10-06 11:31:08 -0700594 flags = CEPH_OSD_FLAG_ORDERSNAP |
595 CEPH_OSD_FLAG_ONDISK |
596 CEPH_OSD_FLAG_WRITE;
Sage Weil124e68e2009-10-06 11:31:08 -0700597
Al Viro4908b822014-04-03 23:09:01 -0400598 while (iov_iter_count(from) > 0) {
599 u64 len = iov_iter_single_seg_count(from);
Al Viro64c31312014-04-03 22:58:25 -0400600 size_t start;
601 ssize_t n;
majianpenge8344e62013-09-12 13:54:26 +0800602
603 snapc = ci->i_snap_realm->cached_context;
604 vino = ceph_vino(inode);
605 req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout,
Yan, Zheng715e4cd2014-11-13 14:40:37 +0800606 vino, pos, &len, 0,
majianpenge8344e62013-09-12 13:54:26 +0800607 2,/*include a 'startsync' command*/
608 CEPH_OSD_OP_WRITE, flags, snapc,
609 ci->i_truncate_seq,
610 ci->i_truncate_size,
611 false);
612 if (IS_ERR(req)) {
613 ret = PTR_ERR(req);
Al Viroeab87232014-04-03 22:44:19 -0400614 break;
majianpenge8344e62013-09-12 13:54:26 +0800615 }
616
Yan, Zheng715e4cd2014-11-13 14:40:37 +0800617 osd_req_op_init(req, 1, CEPH_OSD_OP_STARTSYNC);
618
Al Viro4908b822014-04-03 23:09:01 -0400619 n = iov_iter_get_pages_alloc(from, &pages, len, &start);
Al Viro64c31312014-04-03 22:58:25 -0400620 if (unlikely(n < 0)) {
621 ret = n;
622 ceph_osdc_put_request(req);
623 break;
Sage Weil124e68e2009-10-06 11:31:08 -0700624 }
625
Al Viro64c31312014-04-03 22:58:25 -0400626 num_pages = (n + start + PAGE_SIZE - 1) / PAGE_SIZE;
Sage Weil124e68e2009-10-06 11:31:08 -0700627 /*
628 * throw out any page cache pages in this range. this
629 * may block.
630 */
Sage Weil213c99e2010-08-03 10:25:11 -0700631 truncate_inode_pages_range(inode->i_mapping, pos,
Al Viro64c31312014-04-03 22:58:25 -0400632 (pos+n) | (PAGE_CACHE_SIZE-1));
633 osd_req_op_extent_osd_data_pages(req, 0, pages, n, start,
majianpenge8344e62013-09-12 13:54:26 +0800634 false, false);
635
636 /* BUG_ON(vino.snap != CEPH_NOSNAP); */
637 ceph_osdc_build_request(req, pos, snapc, vino.snap, &mtime);
638
639 ret = ceph_osdc_start_request(&fsc->client->osdc, req, false);
640 if (!ret)
641 ret = ceph_osdc_wait_request(&fsc->client->osdc, req);
642
643 ceph_put_page_vector(pages, num_pages, false);
644
majianpenge8344e62013-09-12 13:54:26 +0800645 ceph_osdc_put_request(req);
Al Viro64c31312014-04-03 22:58:25 -0400646 if (ret)
majianpenge8344e62013-09-12 13:54:26 +0800647 break;
Al Viro64c31312014-04-03 22:58:25 -0400648 pos += n;
649 written += n;
Al Viro4908b822014-04-03 23:09:01 -0400650 iov_iter_advance(from, n);
Al Viro64c31312014-04-03 22:58:25 -0400651
652 if (pos > i_size_read(inode)) {
653 check_caps = ceph_inode_set_size(inode, pos);
654 if (check_caps)
655 ceph_check_caps(ceph_inode(inode),
656 CHECK_CAPS_AUTHONLY,
657 NULL);
658 }
majianpenge8344e62013-09-12 13:54:26 +0800659 }
660
661 if (ret != -EOLDSNAPC && written > 0) {
662 iocb->ki_pos = pos;
663 ret = written;
664 }
665 return ret;
666}
667
668
669/*
670 * Synchronous write, straight from __user pointer or user pages.
671 *
672 * If write spans object boundary, just do multiple writes. (For a
673 * correct atomic write, we should e.g. take write locks on all
674 * objects, rollback on failure, etc.)
675 */
Yan, Zheng06fee302014-07-28 14:33:46 +0800676static ssize_t
677ceph_sync_write(struct kiocb *iocb, struct iov_iter *from, loff_t pos)
majianpenge8344e62013-09-12 13:54:26 +0800678{
679 struct file *file = iocb->ki_filp;
680 struct inode *inode = file_inode(file);
681 struct ceph_inode_info *ci = ceph_inode(inode);
682 struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
683 struct ceph_snap_context *snapc;
684 struct ceph_vino vino;
685 struct ceph_osd_request *req;
686 struct page **pages;
687 u64 len;
688 int num_pages;
689 int written = 0;
690 int flags;
691 int check_caps = 0;
692 int ret;
693 struct timespec mtime = CURRENT_TIME;
Al Viro4908b822014-04-03 23:09:01 -0400694 size_t count = iov_iter_count(from);
majianpenge8344e62013-09-12 13:54:26 +0800695
696 if (ceph_snap(file_inode(file)) != CEPH_NOSNAP)
697 return -EROFS;
698
699 dout("sync_write on file %p %lld~%u\n", file, pos, (unsigned)count);
700
701 ret = filemap_write_and_wait_range(inode->i_mapping, pos, pos + count);
702 if (ret < 0)
703 return ret;
704
705 ret = invalidate_inode_pages2_range(inode->i_mapping,
706 pos >> PAGE_CACHE_SHIFT,
707 (pos + count) >> PAGE_CACHE_SHIFT);
708 if (ret < 0)
709 dout("invalidate_inode_pages2_range returned %d\n", ret);
710
711 flags = CEPH_OSD_FLAG_ORDERSNAP |
712 CEPH_OSD_FLAG_ONDISK |
713 CEPH_OSD_FLAG_WRITE |
714 CEPH_OSD_FLAG_ACK;
715
Al Viro4908b822014-04-03 23:09:01 -0400716 while ((len = iov_iter_count(from)) > 0) {
majianpenge8344e62013-09-12 13:54:26 +0800717 size_t left;
718 int n;
719
720 snapc = ci->i_snap_realm->cached_context;
721 vino = ceph_vino(inode);
722 req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout,
Yan, Zheng715e4cd2014-11-13 14:40:37 +0800723 vino, pos, &len, 0, 1,
majianpenge8344e62013-09-12 13:54:26 +0800724 CEPH_OSD_OP_WRITE, flags, snapc,
725 ci->i_truncate_seq,
726 ci->i_truncate_size,
727 false);
728 if (IS_ERR(req)) {
729 ret = PTR_ERR(req);
Al Viroeab87232014-04-03 22:44:19 -0400730 break;
majianpenge8344e62013-09-12 13:54:26 +0800731 }
732
733 /*
734 * write from beginning of first page,
735 * regardless of io alignment
736 */
737 num_pages = (len + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
738
Yehuda Sadeh34d23762010-04-06 14:33:58 -0700739 pages = ceph_alloc_page_vector(num_pages, GFP_NOFS);
Sage Weil124e68e2009-10-06 11:31:08 -0700740 if (IS_ERR(pages)) {
741 ret = PTR_ERR(pages);
742 goto out;
743 }
majianpenge8344e62013-09-12 13:54:26 +0800744
745 left = len;
746 for (n = 0; n < num_pages; n++) {
Ilya Dryomov125d7252014-01-28 19:16:18 +0200747 size_t plen = min_t(size_t, left, PAGE_SIZE);
Al Viro4908b822014-04-03 23:09:01 -0400748 ret = copy_page_from_iter(pages[n], 0, plen, from);
majianpenge8344e62013-09-12 13:54:26 +0800749 if (ret != plen) {
750 ret = -EFAULT;
751 break;
752 }
753 left -= ret;
majianpenge8344e62013-09-12 13:54:26 +0800754 }
755
Sage Weil124e68e2009-10-06 11:31:08 -0700756 if (ret < 0) {
757 ceph_release_page_vector(pages, num_pages);
758 goto out;
759 }
760
majianpenge8344e62013-09-12 13:54:26 +0800761 /* get a second commit callback */
762 req->r_unsafe_callback = ceph_sync_write_unsafe;
763 req->r_inode = inode;
Sage Weil124e68e2009-10-06 11:31:08 -0700764
majianpenge8344e62013-09-12 13:54:26 +0800765 osd_req_op_extent_osd_data_pages(req, 0, pages, len, 0,
766 false, true);
Alex Elder02ee07d2013-03-14 14:09:06 -0500767
majianpenge8344e62013-09-12 13:54:26 +0800768 /* BUG_ON(vino.snap != CEPH_NOSNAP); */
769 ceph_osdc_build_request(req, pos, snapc, vino.snap, &mtime);
Sage Weil124e68e2009-10-06 11:31:08 -0700770
majianpenge8344e62013-09-12 13:54:26 +0800771 ret = ceph_osdc_start_request(&fsc->client->osdc, req, false);
772 if (!ret)
773 ret = ceph_osdc_wait_request(&fsc->client->osdc, req);
Sage Weil124e68e2009-10-06 11:31:08 -0700774
775out:
majianpenge8344e62013-09-12 13:54:26 +0800776 ceph_osdc_put_request(req);
777 if (ret == 0) {
778 pos += len;
779 written += len;
Sage Weil124e68e2009-10-06 11:31:08 -0700780
majianpenge8344e62013-09-12 13:54:26 +0800781 if (pos > i_size_read(inode)) {
782 check_caps = ceph_inode_set_size(inode, pos);
783 if (check_caps)
784 ceph_check_caps(ceph_inode(inode),
785 CHECK_CAPS_AUTHONLY,
786 NULL);
787 }
788 } else
789 break;
790 }
791
792 if (ret != -EOLDSNAPC && written > 0) {
Sage Weil124e68e2009-10-06 11:31:08 -0700793 ret = written;
majianpenge8344e62013-09-12 13:54:26 +0800794 iocb->ki_pos = pos;
Sage Weil124e68e2009-10-06 11:31:08 -0700795 }
796 return ret;
797}
798
799/*
800 * Wrap generic_file_aio_read with checks for cap bits on the inode.
801 * Atomically grab references, so that those bits are not released
802 * back to the MDS mid-read.
803 *
804 * Hmm, the sync read case isn't actually async... should it be?
805 */
Al Viro36444242014-04-02 20:28:01 -0400806static ssize_t ceph_read_iter(struct kiocb *iocb, struct iov_iter *to)
Sage Weil124e68e2009-10-06 11:31:08 -0700807{
808 struct file *filp = iocb->ki_filp;
Sage Weil29625072010-05-27 10:40:43 -0700809 struct ceph_file_info *fi = filp->private_data;
majianpeng8eb4efb2013-09-26 14:42:17 +0800810 size_t len = iocb->ki_nbytes;
Al Viro496ad9a2013-01-23 17:07:38 -0500811 struct inode *inode = file_inode(filp);
Sage Weil124e68e2009-10-06 11:31:08 -0700812 struct ceph_inode_info *ci = ceph_inode(inode);
Yan, Zheng3738daa2014-11-14 22:10:07 +0800813 struct page *pinned_page = NULL;
Sage Weil124e68e2009-10-06 11:31:08 -0700814 ssize_t ret;
Sage Weil29625072010-05-27 10:40:43 -0700815 int want, got = 0;
Yan, Zheng83701242014-11-14 22:36:18 +0800816 int retry_op = 0, read = 0;
Sage Weil124e68e2009-10-06 11:31:08 -0700817
Sage Weil6a026582010-02-09 14:04:02 -0800818again:
majianpeng8eb4efb2013-09-26 14:42:17 +0800819 dout("aio_read %p %llx.%llx %llu~%u trying to get caps on %p\n",
820 inode, ceph_vinop(inode), iocb->ki_pos, (unsigned)len, inode);
821
Sage Weil29625072010-05-27 10:40:43 -0700822 if (fi->fmode & CEPH_FILE_MODE_LAZY)
823 want = CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO;
824 else
825 want = CEPH_CAP_FILE_CACHE;
Yan, Zheng3738daa2014-11-14 22:10:07 +0800826 ret = ceph_get_caps(ci, CEPH_CAP_FILE_RD, want, -1, &got, &pinned_page);
Sage Weil124e68e2009-10-06 11:31:08 -0700827 if (ret < 0)
majianpeng8eb4efb2013-09-26 14:42:17 +0800828 return ret;
Sage Weil124e68e2009-10-06 11:31:08 -0700829
Sage Weil29625072010-05-27 10:40:43 -0700830 if ((got & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)) == 0 ||
Sage Weil124e68e2009-10-06 11:31:08 -0700831 (iocb->ki_filp->f_flags & O_DIRECT) ||
majianpeng8eb4efb2013-09-26 14:42:17 +0800832 (fi->flags & CEPH_F_SYNC)) {
Sage Weil124e68e2009-10-06 11:31:08 -0700833
majianpeng8eb4efb2013-09-26 14:42:17 +0800834 dout("aio_sync_read %p %llx.%llx %llu~%u got cap refs on %s\n",
835 inode, ceph_vinop(inode), iocb->ki_pos, (unsigned)len,
836 ceph_cap_string(got));
837
Yan, Zheng83701242014-11-14 22:36:18 +0800838 if (ci->i_inline_version == CEPH_INLINE_NONE) {
839 /* hmm, this isn't really async... */
840 ret = ceph_sync_read(iocb, to, &retry_op);
841 } else {
842 retry_op = READ_INLINE;
843 }
majianpeng8eb4efb2013-09-26 14:42:17 +0800844 } else {
majianpeng8eb4efb2013-09-26 14:42:17 +0800845 dout("aio_read %p %llx.%llx %llu~%u got cap refs on %s\n",
Al Viro36444242014-04-02 20:28:01 -0400846 inode, ceph_vinop(inode), iocb->ki_pos, (unsigned)len,
majianpeng8eb4efb2013-09-26 14:42:17 +0800847 ceph_cap_string(got));
848
Al Viro36444242014-04-02 20:28:01 -0400849 ret = generic_file_read_iter(iocb, to);
majianpeng8eb4efb2013-09-26 14:42:17 +0800850 }
Sage Weil124e68e2009-10-06 11:31:08 -0700851 dout("aio_read %p %llx.%llx dropping cap refs on %s = %d\n",
852 inode, ceph_vinop(inode), ceph_cap_string(got), (int)ret);
Yan, Zheng3738daa2014-11-14 22:10:07 +0800853 if (pinned_page) {
854 page_cache_release(pinned_page);
855 pinned_page = NULL;
856 }
Sage Weil124e68e2009-10-06 11:31:08 -0700857 ceph_put_cap_refs(ci, got);
Yan, Zheng83701242014-11-14 22:36:18 +0800858 if (retry_op && ret >= 0) {
859 int statret;
860 struct page *page = NULL;
861 loff_t i_size;
862 if (retry_op == READ_INLINE) {
863 page = __page_cache_alloc(GFP_NOFS);
864 if (!page)
865 return -ENOMEM;
866 }
Sage Weil6a026582010-02-09 14:04:02 -0800867
Yan, Zheng83701242014-11-14 22:36:18 +0800868 statret = __ceph_do_getattr(inode, page,
869 CEPH_STAT_CAP_INLINE_DATA, !!page);
870 if (statret < 0) {
871 __free_page(page);
872 if (statret == -ENODATA) {
873 BUG_ON(retry_op != READ_INLINE);
874 goto again;
875 }
876 return statret;
877 }
878
879 i_size = i_size_read(inode);
880 if (retry_op == READ_INLINE) {
881 /* does not support inline data > PAGE_SIZE */
882 if (i_size > PAGE_CACHE_SIZE) {
883 ret = -EIO;
884 } else if (iocb->ki_pos < i_size) {
885 loff_t end = min_t(loff_t, i_size,
886 iocb->ki_pos + len);
887 if (statret < end)
888 zero_user_segment(page, statret, end);
889 ret = copy_page_to_iter(page,
890 iocb->ki_pos & ~PAGE_MASK,
891 end - iocb->ki_pos, to);
892 iocb->ki_pos += ret;
893 } else {
894 ret = 0;
895 }
896 __free_pages(page, 0);
897 return ret;
898 }
Sage Weil6a026582010-02-09 14:04:02 -0800899
900 /* hit EOF or hole? */
Yan, Zheng83701242014-11-14 22:36:18 +0800901 if (retry_op == CHECK_EOF && iocb->ki_pos < i_size &&
majianpeng8eb4efb2013-09-26 14:42:17 +0800902 ret < len) {
903 dout("sync_read hit hole, ppos %lld < size %lld"
904 ", reading more\n", iocb->ki_pos,
905 inode->i_size);
906
Sage Weil6a026582010-02-09 14:04:02 -0800907 read += ret;
Sage Weil6a026582010-02-09 14:04:02 -0800908 len -= ret;
Yan, Zheng83701242014-11-14 22:36:18 +0800909 retry_op = 0;
Sage Weil6a026582010-02-09 14:04:02 -0800910 goto again;
911 }
912 }
majianpeng8eb4efb2013-09-26 14:42:17 +0800913
Sage Weil6a026582010-02-09 14:04:02 -0800914 if (ret >= 0)
915 ret += read;
916
Sage Weil124e68e2009-10-06 11:31:08 -0700917 return ret;
918}
919
920/*
921 * Take cap references to avoid releasing caps to MDS mid-write.
922 *
923 * If we are synchronous, and write with an old snap context, the OSD
924 * may return EOLDSNAPC. In that case, retry the write.. _after_
925 * dropping our cap refs and allowing the pending snap to logically
926 * complete _before_ this write occurs.
927 *
928 * If we are near ENOSPC, write synchronously.
929 */
Al Viro4908b822014-04-03 23:09:01 -0400930static ssize_t ceph_write_iter(struct kiocb *iocb, struct iov_iter *from)
Sage Weil124e68e2009-10-06 11:31:08 -0700931{
932 struct file *file = iocb->ki_filp;
Sage Weil33caad32010-05-26 14:31:27 -0700933 struct ceph_file_info *fi = file->private_data;
Al Viro496ad9a2013-01-23 17:07:38 -0500934 struct inode *inode = file_inode(file);
Sage Weil124e68e2009-10-06 11:31:08 -0700935 struct ceph_inode_info *ci = ceph_inode(inode);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700936 struct ceph_osd_client *osdc =
937 &ceph_sb_to_client(inode->i_sb)->client->osdc;
Al Viro4908b822014-04-03 23:09:01 -0400938 ssize_t count = iov_iter_count(from), written = 0;
Yan, Zheng03d254e2013-04-12 16:11:13 +0800939 int err, want, got;
Al Viro4908b822014-04-03 23:09:01 -0400940 loff_t pos = iocb->ki_pos;
Sage Weil124e68e2009-10-06 11:31:08 -0700941
942 if (ceph_snap(inode) != CEPH_NOSNAP)
943 return -EROFS;
944
Yan, Zheng03d254e2013-04-12 16:11:13 +0800945 mutex_lock(&inode->i_mutex);
Yan, Zheng03d254e2013-04-12 16:11:13 +0800946
Yan, Zheng03d254e2013-04-12 16:11:13 +0800947 /* We can write back this queue in page reclaim */
948 current->backing_dev_info = file->f_mapping->backing_dev_info;
949
950 err = generic_write_checks(file, &pos, &count, S_ISBLK(inode->i_mode));
951 if (err)
952 goto out;
953
954 if (count == 0)
955 goto out;
Al Viro4908b822014-04-03 23:09:01 -0400956 iov_iter_truncate(from, count);
Yan, Zheng03d254e2013-04-12 16:11:13 +0800957
958 err = file_remove_suid(file);
959 if (err)
960 goto out;
961
962 err = file_update_time(file);
963 if (err)
964 goto out;
965
Sage Weil124e68e2009-10-06 11:31:08 -0700966retry_snap:
Yan, Zheng6070e0c2013-03-01 10:55:39 +0800967 if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL)) {
Yan, Zheng03d254e2013-04-12 16:11:13 +0800968 err = -ENOSPC;
Yan, Zheng6070e0c2013-03-01 10:55:39 +0800969 goto out;
970 }
Yan, Zheng03d254e2013-04-12 16:11:13 +0800971
Randy Dunlapac7f29b2013-04-19 14:20:07 -0700972 dout("aio_write %p %llx.%llx %llu~%zd getting caps. i_size %llu\n",
Yan, Zheng03d254e2013-04-12 16:11:13 +0800973 inode, ceph_vinop(inode), pos, count, inode->i_size);
Sage Weil7971bd92013-05-01 21:15:58 -0700974 if (fi->fmode & CEPH_FILE_MODE_LAZY)
975 want = CEPH_CAP_FILE_BUFFER | CEPH_CAP_FILE_LAZYIO;
976 else
977 want = CEPH_CAP_FILE_BUFFER;
Yan, Zheng03d254e2013-04-12 16:11:13 +0800978 got = 0;
Yan, Zheng3738daa2014-11-14 22:10:07 +0800979 err = ceph_get_caps(ci, CEPH_CAP_FILE_WR, want, pos + count,
980 &got, NULL);
Yan, Zheng03d254e2013-04-12 16:11:13 +0800981 if (err < 0)
Yan, Zheng37505d52013-04-12 16:11:10 +0800982 goto out;
Sage Weil124e68e2009-10-06 11:31:08 -0700983
Randy Dunlapac7f29b2013-04-19 14:20:07 -0700984 dout("aio_write %p %llx.%llx %llu~%zd got cap refs on %s\n",
Yan, Zheng03d254e2013-04-12 16:11:13 +0800985 inode, ceph_vinop(inode), pos, count, ceph_cap_string(got));
Sage Weil7971bd92013-05-01 21:15:58 -0700986
987 if ((got & (CEPH_CAP_FILE_BUFFER|CEPH_CAP_FILE_LAZYIO)) == 0 ||
majianpenge8344e62013-09-12 13:54:26 +0800988 (file->f_flags & O_DIRECT) || (fi->flags & CEPH_F_SYNC)) {
Al Viro4908b822014-04-03 23:09:01 -0400989 struct iov_iter data;
Yan, Zheng37505d52013-04-12 16:11:10 +0800990 mutex_unlock(&inode->i_mutex);
Al Viro4908b822014-04-03 23:09:01 -0400991 /* we might need to revert back to that point */
992 data = *from;
majianpenge8344e62013-09-12 13:54:26 +0800993 if (file->f_flags & O_DIRECT)
Yan, Zheng06fee302014-07-28 14:33:46 +0800994 written = ceph_sync_direct_write(iocb, &data, pos);
majianpenge8344e62013-09-12 13:54:26 +0800995 else
Yan, Zheng06fee302014-07-28 14:33:46 +0800996 written = ceph_sync_write(iocb, &data, pos);
majianpeng0e5dd452013-08-08 15:32:19 +0800997 if (written == -EOLDSNAPC) {
998 dout("aio_write %p %llx.%llx %llu~%u"
999 "got EOLDSNAPC, retrying\n",
1000 inode, ceph_vinop(inode),
Al Viro4908b822014-04-03 23:09:01 -04001001 pos, (unsigned)count);
majianpeng0e5dd452013-08-08 15:32:19 +08001002 mutex_lock(&inode->i_mutex);
majianpeng0e5dd452013-08-08 15:32:19 +08001003 goto retry_snap;
1004 }
Al Viro4908b822014-04-03 23:09:01 -04001005 if (written > 0)
1006 iov_iter_advance(from, written);
Sage Weil7971bd92013-05-01 21:15:58 -07001007 } else {
Yunchuan Wen32d3e142013-12-26 06:29:27 -08001008 loff_t old_size = inode->i_size;
Yan, Zhengb0d7c222013-08-12 21:42:15 -07001009 /*
1010 * No need to acquire the i_truncate_mutex. Because
1011 * the MDS revokes Fwb caps before sending truncate
1012 * message to us. We can't get Fwb cap while there
1013 * are pending vmtruncate. So write and vmtruncate
1014 * can not run at the same time
1015 */
Al Viro4908b822014-04-03 23:09:01 -04001016 written = generic_perform_write(file, from, pos);
Al Viroaec605f42014-02-11 22:28:43 -05001017 if (likely(written >= 0))
1018 iocb->ki_pos = pos + written;
Yunchuan Wen32d3e142013-12-26 06:29:27 -08001019 if (inode->i_size > old_size)
1020 ceph_fscache_update_objectsize(inode);
Yan, Zheng6070e0c2013-03-01 10:55:39 +08001021 mutex_unlock(&inode->i_mutex);
Sage Weil124e68e2009-10-06 11:31:08 -07001022 }
Sage Weild8de9ab2011-07-26 11:27:34 -07001023
Yan, Zheng03d254e2013-04-12 16:11:13 +08001024 if (written >= 0) {
Sage Weilfca65b42011-05-04 11:33:47 -07001025 int dirty;
Sage Weilbe655592011-11-30 09:47:09 -08001026 spin_lock(&ci->i_ceph_lock);
Sage Weilfca65b42011-05-04 11:33:47 -07001027 dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR);
Sage Weilbe655592011-11-30 09:47:09 -08001028 spin_unlock(&ci->i_ceph_lock);
Sage Weilfca65b42011-05-04 11:33:47 -07001029 if (dirty)
1030 __mark_inode_dirty(inode, dirty);
Sage Weil124e68e2009-10-06 11:31:08 -07001031 }
Sage Weil7971bd92013-05-01 21:15:58 -07001032
Sage Weil124e68e2009-10-06 11:31:08 -07001033 dout("aio_write %p %llx.%llx %llu~%u dropping cap refs on %s\n",
Al Viro4908b822014-04-03 23:09:01 -04001034 inode, ceph_vinop(inode), pos, (unsigned)count,
Sage Weil7971bd92013-05-01 21:15:58 -07001035 ceph_cap_string(got));
Sage Weil124e68e2009-10-06 11:31:08 -07001036 ceph_put_cap_refs(ci, got);
Sage Weil7971bd92013-05-01 21:15:58 -07001037
Yan, Zheng03d254e2013-04-12 16:11:13 +08001038 if (written >= 0 &&
Yan, Zheng6070e0c2013-03-01 10:55:39 +08001039 ((file->f_flags & O_SYNC) || IS_SYNC(file->f_mapping->host) ||
1040 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_NEARFULL))) {
Yan, Zheng03d254e2013-04-12 16:11:13 +08001041 err = vfs_fsync_range(file, pos, pos + written - 1, 1);
Yan, Zheng6070e0c2013-03-01 10:55:39 +08001042 if (err < 0)
Yan, Zheng03d254e2013-04-12 16:11:13 +08001043 written = err;
Yan, Zheng6070e0c2013-03-01 10:55:39 +08001044 }
Yan, Zheng03d254e2013-04-12 16:11:13 +08001045
Sage Weil2f75e9e2013-08-09 09:57:58 -07001046 goto out_unlocked;
Sage Weil124e68e2009-10-06 11:31:08 -07001047
Sage Weil2f75e9e2013-08-09 09:57:58 -07001048out:
1049 mutex_unlock(&inode->i_mutex);
1050out_unlocked:
1051 current->backing_dev_info = NULL;
Yan, Zheng03d254e2013-04-12 16:11:13 +08001052 return written ? written : err;
Sage Weil124e68e2009-10-06 11:31:08 -07001053}
1054
1055/*
1056 * llseek. be sure to verify file size on SEEK_END.
1057 */
Andrew Morton965c8e52012-12-17 15:59:39 -08001058static loff_t ceph_llseek(struct file *file, loff_t offset, int whence)
Sage Weil124e68e2009-10-06 11:31:08 -07001059{
1060 struct inode *inode = file->f_mapping->host;
1061 int ret;
1062
1063 mutex_lock(&inode->i_mutex);
Sage Weil6a82c472011-12-13 09:19:26 -08001064
Andrew Morton965c8e52012-12-17 15:59:39 -08001065 if (whence == SEEK_END || whence == SEEK_DATA || whence == SEEK_HOLE) {
Yan, Zheng508b32d2014-09-16 21:46:17 +08001066 ret = ceph_do_getattr(inode, CEPH_STAT_CAP_SIZE, false);
Sage Weil124e68e2009-10-06 11:31:08 -07001067 if (ret < 0) {
1068 offset = ret;
1069 goto out;
1070 }
Josef Bacik06222e42011-07-18 13:21:38 -04001071 }
1072
Andrew Morton965c8e52012-12-17 15:59:39 -08001073 switch (whence) {
Josef Bacik06222e42011-07-18 13:21:38 -04001074 case SEEK_END:
Sage Weil124e68e2009-10-06 11:31:08 -07001075 offset += inode->i_size;
1076 break;
1077 case SEEK_CUR:
1078 /*
1079 * Here we special-case the lseek(fd, 0, SEEK_CUR)
1080 * position-querying operation. Avoid rewriting the "same"
1081 * f_pos value back to the file because a concurrent read(),
1082 * write() or lseek() might have altered it
1083 */
1084 if (offset == 0) {
1085 offset = file->f_pos;
1086 goto out;
1087 }
1088 offset += file->f_pos;
1089 break;
Josef Bacik06222e42011-07-18 13:21:38 -04001090 case SEEK_DATA:
1091 if (offset >= inode->i_size) {
1092 ret = -ENXIO;
1093 goto out;
1094 }
1095 break;
1096 case SEEK_HOLE:
1097 if (offset >= inode->i_size) {
1098 ret = -ENXIO;
1099 goto out;
1100 }
1101 offset = inode->i_size;
1102 break;
Sage Weil124e68e2009-10-06 11:31:08 -07001103 }
1104
Jie Liu46a1c2c2013-06-25 12:02:13 +08001105 offset = vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
Sage Weil124e68e2009-10-06 11:31:08 -07001106
1107out:
1108 mutex_unlock(&inode->i_mutex);
1109 return offset;
1110}
1111
Li Wangad7a60d2013-08-15 11:51:44 +08001112static inline void ceph_zero_partial_page(
1113 struct inode *inode, loff_t offset, unsigned size)
1114{
1115 struct page *page;
1116 pgoff_t index = offset >> PAGE_CACHE_SHIFT;
1117
1118 page = find_lock_page(inode->i_mapping, index);
1119 if (page) {
1120 wait_on_page_writeback(page);
1121 zero_user(page, offset & (PAGE_CACHE_SIZE - 1), size);
1122 unlock_page(page);
1123 page_cache_release(page);
1124 }
1125}
1126
1127static void ceph_zero_pagecache_range(struct inode *inode, loff_t offset,
1128 loff_t length)
1129{
1130 loff_t nearly = round_up(offset, PAGE_CACHE_SIZE);
1131 if (offset < nearly) {
1132 loff_t size = nearly - offset;
1133 if (length < size)
1134 size = length;
1135 ceph_zero_partial_page(inode, offset, size);
1136 offset += size;
1137 length -= size;
1138 }
1139 if (length >= PAGE_CACHE_SIZE) {
1140 loff_t size = round_down(length, PAGE_CACHE_SIZE);
1141 truncate_pagecache_range(inode, offset, offset + size - 1);
1142 offset += size;
1143 length -= size;
1144 }
1145 if (length)
1146 ceph_zero_partial_page(inode, offset, length);
1147}
1148
1149static int ceph_zero_partial_object(struct inode *inode,
1150 loff_t offset, loff_t *length)
1151{
1152 struct ceph_inode_info *ci = ceph_inode(inode);
1153 struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
1154 struct ceph_osd_request *req;
1155 int ret = 0;
1156 loff_t zero = 0;
1157 int op;
1158
1159 if (!length) {
1160 op = offset ? CEPH_OSD_OP_DELETE : CEPH_OSD_OP_TRUNCATE;
1161 length = &zero;
1162 } else {
1163 op = CEPH_OSD_OP_ZERO;
1164 }
1165
1166 req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout,
1167 ceph_vino(inode),
1168 offset, length,
Yan, Zheng715e4cd2014-11-13 14:40:37 +08001169 0, 1, op,
Li Wangad7a60d2013-08-15 11:51:44 +08001170 CEPH_OSD_FLAG_WRITE |
1171 CEPH_OSD_FLAG_ONDISK,
1172 NULL, 0, 0, false);
1173 if (IS_ERR(req)) {
1174 ret = PTR_ERR(req);
1175 goto out;
1176 }
1177
1178 ceph_osdc_build_request(req, offset, NULL, ceph_vino(inode).snap,
1179 &inode->i_mtime);
1180
1181 ret = ceph_osdc_start_request(&fsc->client->osdc, req, false);
1182 if (!ret) {
1183 ret = ceph_osdc_wait_request(&fsc->client->osdc, req);
1184 if (ret == -ENOENT)
1185 ret = 0;
1186 }
1187 ceph_osdc_put_request(req);
1188
1189out:
1190 return ret;
1191}
1192
1193static int ceph_zero_objects(struct inode *inode, loff_t offset, loff_t length)
1194{
1195 int ret = 0;
1196 struct ceph_inode_info *ci = ceph_inode(inode);
Sage Weilb314a902013-08-27 12:15:16 -07001197 s32 stripe_unit = ceph_file_layout_su(ci->i_layout);
1198 s32 stripe_count = ceph_file_layout_stripe_count(ci->i_layout);
1199 s32 object_size = ceph_file_layout_object_size(ci->i_layout);
1200 u64 object_set_size = object_size * stripe_count;
1201 u64 nearly, t;
Li Wangad7a60d2013-08-15 11:51:44 +08001202
Sage Weilb314a902013-08-27 12:15:16 -07001203 /* round offset up to next period boundary */
1204 nearly = offset + object_set_size - 1;
1205 t = nearly;
1206 nearly -= do_div(t, object_set_size);
1207
Li Wangad7a60d2013-08-15 11:51:44 +08001208 while (length && offset < nearly) {
1209 loff_t size = length;
1210 ret = ceph_zero_partial_object(inode, offset, &size);
1211 if (ret < 0)
1212 return ret;
1213 offset += size;
1214 length -= size;
1215 }
1216 while (length >= object_set_size) {
1217 int i;
1218 loff_t pos = offset;
1219 for (i = 0; i < stripe_count; ++i) {
1220 ret = ceph_zero_partial_object(inode, pos, NULL);
1221 if (ret < 0)
1222 return ret;
1223 pos += stripe_unit;
1224 }
1225 offset += object_set_size;
1226 length -= object_set_size;
1227 }
1228 while (length) {
1229 loff_t size = length;
1230 ret = ceph_zero_partial_object(inode, offset, &size);
1231 if (ret < 0)
1232 return ret;
1233 offset += size;
1234 length -= size;
1235 }
1236 return ret;
1237}
1238
1239static long ceph_fallocate(struct file *file, int mode,
1240 loff_t offset, loff_t length)
1241{
1242 struct ceph_file_info *fi = file->private_data;
Libo Chenaa8b60e2013-12-11 13:49:11 +08001243 struct inode *inode = file_inode(file);
Li Wangad7a60d2013-08-15 11:51:44 +08001244 struct ceph_inode_info *ci = ceph_inode(inode);
1245 struct ceph_osd_client *osdc =
1246 &ceph_inode_to_client(inode)->client->osdc;
1247 int want, got = 0;
1248 int dirty;
1249 int ret = 0;
1250 loff_t endoff = 0;
1251 loff_t size;
1252
Yan, Zheng494d77b2014-06-26 15:25:17 +08001253 if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE))
1254 return -EOPNOTSUPP;
1255
Li Wangad7a60d2013-08-15 11:51:44 +08001256 if (!S_ISREG(inode->i_mode))
1257 return -EOPNOTSUPP;
1258
Li Wangad7a60d2013-08-15 11:51:44 +08001259 mutex_lock(&inode->i_mutex);
1260
1261 if (ceph_snap(inode) != CEPH_NOSNAP) {
1262 ret = -EROFS;
1263 goto unlock;
1264 }
1265
1266 if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL) &&
1267 !(mode & FALLOC_FL_PUNCH_HOLE)) {
1268 ret = -ENOSPC;
1269 goto unlock;
1270 }
1271
1272 size = i_size_read(inode);
1273 if (!(mode & FALLOC_FL_KEEP_SIZE))
1274 endoff = offset + length;
1275
1276 if (fi->fmode & CEPH_FILE_MODE_LAZY)
1277 want = CEPH_CAP_FILE_BUFFER | CEPH_CAP_FILE_LAZYIO;
1278 else
1279 want = CEPH_CAP_FILE_BUFFER;
1280
Yan, Zheng3738daa2014-11-14 22:10:07 +08001281 ret = ceph_get_caps(ci, CEPH_CAP_FILE_WR, want, endoff, &got, NULL);
Li Wangad7a60d2013-08-15 11:51:44 +08001282 if (ret < 0)
1283 goto unlock;
1284
1285 if (mode & FALLOC_FL_PUNCH_HOLE) {
1286 if (offset < size)
1287 ceph_zero_pagecache_range(inode, offset, length);
1288 ret = ceph_zero_objects(inode, offset, length);
1289 } else if (endoff > size) {
1290 truncate_pagecache_range(inode, size, -1);
1291 if (ceph_inode_set_size(inode, endoff))
1292 ceph_check_caps(ceph_inode(inode),
1293 CHECK_CAPS_AUTHONLY, NULL);
1294 }
1295
1296 if (!ret) {
1297 spin_lock(&ci->i_ceph_lock);
1298 dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR);
1299 spin_unlock(&ci->i_ceph_lock);
1300 if (dirty)
1301 __mark_inode_dirty(inode, dirty);
1302 }
1303
1304 ceph_put_cap_refs(ci, got);
1305unlock:
1306 mutex_unlock(&inode->i_mutex);
1307 return ret;
1308}
1309
Sage Weil124e68e2009-10-06 11:31:08 -07001310const struct file_operations ceph_file_fops = {
1311 .open = ceph_open,
1312 .release = ceph_release,
1313 .llseek = ceph_llseek,
Al Viro36444242014-04-02 20:28:01 -04001314 .read = new_sync_read,
Al Viro4908b822014-04-03 23:09:01 -04001315 .write = new_sync_write,
Al Viro36444242014-04-02 20:28:01 -04001316 .read_iter = ceph_read_iter,
Al Viro4908b822014-04-03 23:09:01 -04001317 .write_iter = ceph_write_iter,
Sage Weil124e68e2009-10-06 11:31:08 -07001318 .mmap = ceph_mmap,
1319 .fsync = ceph_fsync,
Greg Farnum40819f62010-08-02 15:34:23 -07001320 .lock = ceph_lock,
1321 .flock = ceph_flock,
Sage Weil124e68e2009-10-06 11:31:08 -07001322 .splice_read = generic_file_splice_read,
Al Viro3551dd72014-04-05 04:40:12 -04001323 .splice_write = iter_file_splice_write,
Sage Weil124e68e2009-10-06 11:31:08 -07001324 .unlocked_ioctl = ceph_ioctl,
1325 .compat_ioctl = ceph_ioctl,
Li Wangad7a60d2013-08-15 11:51:44 +08001326 .fallocate = ceph_fallocate,
Sage Weil124e68e2009-10-06 11:31:08 -07001327};
1328