blob: 64915eeae5a7112f59256185a00a1cc9f3b2a193 [file] [log] [blame]
David Teiglandb3b94fa2006-01-16 16:50:04 +00001/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
Steven Whitehousef2741d92011-05-13 12:11:17 +01003 * Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved.
David Teiglandb3b94fa2006-01-16 16:50:04 +00004 *
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -04007 * of the GNU General Public License version 2.
David Teiglandb3b94fa2006-01-16 16:50:04 +00008 */
9
David Teiglandb3b94fa2006-01-16 16:50:04 +000010#include <linux/slab.h>
11#include <linux/spinlock.h>
12#include <linux/completion.h>
13#include <linux/buffer_head.h>
14#include <linux/namei.h>
David Teiglandb3b94fa2006-01-16 16:50:04 +000015#include <linux/mm.h>
16#include <linux/xattr.h>
17#include <linux/posix_acl.h>
Steven Whitehouse5c676f62006-02-27 17:23:27 -050018#include <linux/gfs2_ondisk.h>
Steven Whitehouse71b86f52006-03-28 14:14:04 -050019#include <linux/crc32.h>
Steven Whitehousee9079cc2008-10-14 14:43:29 +010020#include <linux/fiemap.h>
Steven Whitehouse194c0112011-05-09 14:06:38 +010021#include <linux/security.h>
David Teiglandb3b94fa2006-01-16 16:50:04 +000022#include <asm/uaccess.h>
23
24#include "gfs2.h"
Steven Whitehouse5c676f62006-02-27 17:23:27 -050025#include "incore.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000026#include "acl.h"
27#include "bmap.h"
28#include "dir.h"
Steven Whitehouse307cf6e2009-08-26 18:51:04 +010029#include "xattr.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000030#include "glock.h"
31#include "inode.h"
32#include "meta_io.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000033#include "quota.h"
34#include "rgrp.h"
35#include "trans.h"
Steven Whitehouse5c676f62006-02-27 17:23:27 -050036#include "util.h"
Steven Whitehouseb2760582008-10-14 16:05:55 +010037#include "super.h"
Steven Whitehouse194c0112011-05-09 14:06:38 +010038#include "glops.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000039
Steven Whitehouse194c0112011-05-09 14:06:38 +010040struct gfs2_skip_data {
41 u64 no_addr;
42 int skipped;
43 int non_block;
44};
45
46static int iget_test(struct inode *inode, void *opaque)
47{
48 struct gfs2_inode *ip = GFS2_I(inode);
49 struct gfs2_skip_data *data = opaque;
50
51 if (ip->i_no_addr == data->no_addr) {
52 if (data->non_block &&
53 inode->i_state & (I_FREEING|I_CLEAR|I_WILL_FREE)) {
54 data->skipped = 1;
55 return 0;
56 }
57 return 1;
58 }
59 return 0;
60}
61
62static int iget_set(struct inode *inode, void *opaque)
63{
64 struct gfs2_inode *ip = GFS2_I(inode);
65 struct gfs2_skip_data *data = opaque;
66
67 if (data->skipped)
68 return -ENOENT;
69 inode->i_ino = (unsigned long)(data->no_addr);
70 ip->i_no_addr = data->no_addr;
71 return 0;
72}
73
74struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr, int non_block)
75{
76 unsigned long hash = (unsigned long)no_addr;
77 struct gfs2_skip_data data;
78
79 data.no_addr = no_addr;
80 data.skipped = 0;
81 data.non_block = non_block;
82 return ilookup5(sb, hash, iget_test, &data);
83}
84
85static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr,
86 int non_block)
87{
88 struct gfs2_skip_data data;
89 unsigned long hash = (unsigned long)no_addr;
90
91 data.no_addr = no_addr;
92 data.skipped = 0;
93 data.non_block = non_block;
94 return iget5_locked(sb, hash, iget_test, iget_set, &data);
95}
96
97/**
98 * gfs2_set_iop - Sets inode operations
99 * @inode: The inode with correct i_mode filled in
100 *
101 * GFS2 lookup code fills in vfs inode contents based on info obtained
102 * from directory entry inside gfs2_inode_lookup().
103 */
104
105static void gfs2_set_iop(struct inode *inode)
106{
107 struct gfs2_sbd *sdp = GFS2_SB(inode);
108 umode_t mode = inode->i_mode;
109
110 if (S_ISREG(mode)) {
111 inode->i_op = &gfs2_file_iops;
112 if (gfs2_localflocks(sdp))
113 inode->i_fop = &gfs2_file_fops_nolock;
114 else
115 inode->i_fop = &gfs2_file_fops;
116 } else if (S_ISDIR(mode)) {
117 inode->i_op = &gfs2_dir_iops;
118 if (gfs2_localflocks(sdp))
119 inode->i_fop = &gfs2_dir_fops_nolock;
120 else
121 inode->i_fop = &gfs2_dir_fops;
122 } else if (S_ISLNK(mode)) {
123 inode->i_op = &gfs2_symlink_iops;
124 } else {
125 inode->i_op = &gfs2_file_iops;
126 init_special_inode(inode, inode->i_mode, inode->i_rdev);
127 }
128}
129
130/**
131 * gfs2_inode_lookup - Lookup an inode
132 * @sb: The super block
133 * @no_addr: The inode number
134 * @type: The type of the inode
135 * non_block: Can we block on inodes that are being freed?
136 *
137 * Returns: A VFS inode, or an error
138 */
139
140struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type,
141 u64 no_addr, u64 no_formal_ino, int non_block)
142{
143 struct inode *inode;
144 struct gfs2_inode *ip;
145 struct gfs2_glock *io_gl = NULL;
146 int error;
147
148 inode = gfs2_iget(sb, no_addr, non_block);
149 ip = GFS2_I(inode);
150
151 if (!inode)
152 return ERR_PTR(-ENOBUFS);
153
154 if (inode->i_state & I_NEW) {
155 struct gfs2_sbd *sdp = GFS2_SB(inode);
156 ip->i_no_formal_ino = no_formal_ino;
157
158 error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl);
159 if (unlikely(error))
160 goto fail;
161 ip->i_gl->gl_object = ip;
162
163 error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
164 if (unlikely(error))
165 goto fail_put;
166
167 set_bit(GIF_INVALID, &ip->i_flags);
168 error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
169 if (unlikely(error))
170 goto fail_iopen;
171
172 ip->i_iopen_gh.gh_gl->gl_object = ip;
173 gfs2_glock_put(io_gl);
174 io_gl = NULL;
175
176 if (type == DT_UNKNOWN) {
177 /* Inode glock must be locked already */
178 error = gfs2_inode_refresh(GFS2_I(inode));
179 if (error)
180 goto fail_refresh;
181 } else {
182 inode->i_mode = DT2IF(type);
183 }
184
185 gfs2_set_iop(inode);
186 unlock_new_inode(inode);
187 }
188
189 return inode;
190
191fail_refresh:
Bob Petersona6a4d982013-05-29 11:51:52 -0400192 ip->i_iopen_gh.gh_flags |= GL_NOCACHE;
Steven Whitehouse194c0112011-05-09 14:06:38 +0100193 ip->i_iopen_gh.gh_gl->gl_object = NULL;
194 gfs2_glock_dq_uninit(&ip->i_iopen_gh);
195fail_iopen:
196 if (io_gl)
197 gfs2_glock_put(io_gl);
198fail_put:
199 ip->i_gl->gl_object = NULL;
200 gfs2_glock_put(ip->i_gl);
201fail:
202 iget_failed(inode);
203 return ERR_PTR(error);
204}
205
206struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr,
207 u64 *no_formal_ino, unsigned int blktype)
208{
209 struct super_block *sb = sdp->sd_vfs;
210 struct gfs2_holder i_gh;
211 struct inode *inode = NULL;
212 int error;
213
214 /* Must not read in block until block type is verified */
215 error = gfs2_glock_nq_num(sdp, no_addr, &gfs2_inode_glops,
216 LM_ST_EXCLUSIVE, GL_SKIP, &i_gh);
217 if (error)
218 return ERR_PTR(error);
219
220 error = gfs2_check_blk_type(sdp, no_addr, blktype);
221 if (error)
222 goto fail;
223
224 inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, 0, 1);
225 if (IS_ERR(inode))
226 goto fail;
227
228 /* Two extra checks for NFS only */
229 if (no_formal_ino) {
230 error = -ESTALE;
231 if (GFS2_I(inode)->i_no_formal_ino != *no_formal_ino)
232 goto fail_iput;
233
234 error = -EIO;
235 if (GFS2_I(inode)->i_diskflags & GFS2_DIF_SYSTEM)
236 goto fail_iput;
237
238 error = 0;
239 }
240
241fail:
242 gfs2_glock_dq_uninit(&i_gh);
243 return error ? ERR_PTR(error) : inode;
244fail_iput:
245 iput(inode);
246 goto fail;
247}
248
249
250struct inode *gfs2_lookup_simple(struct inode *dip, const char *name)
251{
252 struct qstr qstr;
253 struct inode *inode;
254 gfs2_str2qstr(&qstr, name);
255 inode = gfs2_lookupi(dip, &qstr, 1);
256 /* gfs2_lookupi has inconsistent callers: vfs
257 * related routines expect NULL for no entry found,
258 * gfs2_lookup_simple callers expect ENOENT
259 * and do not check for NULL.
260 */
261 if (inode == NULL)
262 return ERR_PTR(-ENOENT);
263 else
264 return inode;
265}
266
267
268/**
269 * gfs2_lookupi - Look up a filename in a directory and return its inode
270 * @d_gh: An initialized holder for the directory glock
271 * @name: The name of the inode to look for
272 * @is_root: If 1, ignore the caller's permissions
273 * @i_gh: An uninitialized holder for the new inode glock
274 *
275 * This can be called via the VFS filldir function when NFS is doing
276 * a readdirplus and the inode which its intending to stat isn't
277 * already in cache. In this case we must not take the directory glock
278 * again, since the readdir call will have already taken that lock.
279 *
280 * Returns: errno
281 */
282
283struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
284 int is_root)
285{
286 struct super_block *sb = dir->i_sb;
287 struct gfs2_inode *dip = GFS2_I(dir);
288 struct gfs2_holder d_gh;
289 int error = 0;
290 struct inode *inode = NULL;
291 int unlock = 0;
292
293 if (!name->len || name->len > GFS2_FNAMESIZE)
294 return ERR_PTR(-ENAMETOOLONG);
295
296 if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) ||
297 (name->len == 2 && memcmp(name->name, "..", 2) == 0 &&
298 dir == sb->s_root->d_inode)) {
299 igrab(dir);
300 return dir;
301 }
302
303 if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) {
304 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh);
305 if (error)
306 return ERR_PTR(error);
307 unlock = 1;
308 }
309
310 if (!is_root) {
Al Viro10556cb2011-06-20 19:28:19 -0400311 error = gfs2_permission(dir, MAY_EXEC);
Steven Whitehouse194c0112011-05-09 14:06:38 +0100312 if (error)
313 goto out;
314 }
315
Steven Whitehouse5a00f3c2013-06-11 13:45:29 +0100316 inode = gfs2_dir_search(dir, name, false);
Steven Whitehouse194c0112011-05-09 14:06:38 +0100317 if (IS_ERR(inode))
318 error = PTR_ERR(inode);
319out:
320 if (unlock)
321 gfs2_glock_dq_uninit(&d_gh);
322 if (error == -ENOENT)
323 return NULL;
324 return inode ? inode : ERR_PTR(error);
325}
326
327/**
328 * create_ok - OK to create a new on-disk inode here?
329 * @dip: Directory in which dinode is to be created
330 * @name: Name of new dinode
331 * @mode:
332 *
333 * Returns: errno
334 */
335
336static int create_ok(struct gfs2_inode *dip, const struct qstr *name,
Al Viro175a4eb2011-07-26 03:30:54 -0400337 umode_t mode)
Steven Whitehouse194c0112011-05-09 14:06:38 +0100338{
339 int error;
340
Al Viro10556cb2011-06-20 19:28:19 -0400341 error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC);
Steven Whitehouse194c0112011-05-09 14:06:38 +0100342 if (error)
343 return error;
344
345 /* Don't create entries in an unlinked directory */
346 if (!dip->i_inode.i_nlink)
347 return -ENOENT;
348
Steven Whitehouse194c0112011-05-09 14:06:38 +0100349 if (dip->i_entries == (u32)-1)
350 return -EFBIG;
351 if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1)
352 return -EMLINK;
353
354 return 0;
355}
356
Steven Whitehousec9aecf72012-10-31 10:30:22 +0000357static void munge_mode_uid_gid(const struct gfs2_inode *dip,
358 struct inode *inode)
Steven Whitehouse194c0112011-05-09 14:06:38 +0100359{
360 if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir &&
Eric W. Biederman6b24c0d2013-01-31 21:56:13 -0800361 (dip->i_inode.i_mode & S_ISUID) &&
362 !uid_eq(dip->i_inode.i_uid, GLOBAL_ROOT_UID)) {
Steven Whitehousec9aecf72012-10-31 10:30:22 +0000363 if (S_ISDIR(inode->i_mode))
364 inode->i_mode |= S_ISUID;
Eric W. Biederman6b24c0d2013-01-31 21:56:13 -0800365 else if (!uid_eq(dip->i_inode.i_uid, current_fsuid()))
Steven Whitehousec9aecf72012-10-31 10:30:22 +0000366 inode->i_mode &= ~07111;
367 inode->i_uid = dip->i_inode.i_uid;
Steven Whitehouse194c0112011-05-09 14:06:38 +0100368 } else
Steven Whitehousec9aecf72012-10-31 10:30:22 +0000369 inode->i_uid = current_fsuid();
Steven Whitehouse194c0112011-05-09 14:06:38 +0100370
371 if (dip->i_inode.i_mode & S_ISGID) {
Steven Whitehousec9aecf72012-10-31 10:30:22 +0000372 if (S_ISDIR(inode->i_mode))
373 inode->i_mode |= S_ISGID;
374 inode->i_gid = dip->i_inode.i_gid;
Steven Whitehouse194c0112011-05-09 14:06:38 +0100375 } else
Steven Whitehousec9aecf72012-10-31 10:30:22 +0000376 inode->i_gid = current_fsgid();
Steven Whitehouse194c0112011-05-09 14:06:38 +0100377}
378
Steven Whitehouse9dbe9612012-10-31 10:37:10 +0000379static int alloc_dinode(struct gfs2_inode *ip, u32 flags)
Steven Whitehouse194c0112011-05-09 14:06:38 +0100380{
Steven Whitehousec9aecf72012-10-31 10:30:22 +0000381 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
Steven Whitehouse194c0112011-05-09 14:06:38 +0100382 int error;
Steven Whitehouse6a8099e2011-11-22 12:18:51 +0000383 int dblocks = 1;
Steven Whitehouse194c0112011-05-09 14:06:38 +0100384
Steven Whitehousefd4b4e02013-02-26 16:15:20 +0000385 error = gfs2_quota_lock_check(ip);
Steven Whitehouse194c0112011-05-09 14:06:38 +0100386 if (error)
387 goto out;
388
Steven Whitehousefd4b4e02013-02-26 16:15:20 +0000389 error = gfs2_inplace_reserve(ip, RES_DINODE, flags);
390 if (error)
391 goto out_quota;
392
393 error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS + RES_QUOTA, 0);
Steven Whitehouse194c0112011-05-09 14:06:38 +0100394 if (error)
395 goto out_ipreserv;
396
Steven Whitehousec9aecf72012-10-31 10:30:22 +0000397 error = gfs2_alloc_blocks(ip, &ip->i_no_addr, &dblocks, 1, &ip->i_generation);
398 ip->i_no_formal_ino = ip->i_generation;
399 ip->i_inode.i_ino = ip->i_no_addr;
400 ip->i_goal = ip->i_no_addr;
Steven Whitehouse194c0112011-05-09 14:06:38 +0100401
402 gfs2_trans_end(sdp);
403
404out_ipreserv:
Steven Whitehousec9aecf72012-10-31 10:30:22 +0000405 gfs2_inplace_release(ip);
Steven Whitehousefd4b4e02013-02-26 16:15:20 +0000406out_quota:
407 gfs2_quota_unlock(ip);
Steven Whitehouse194c0112011-05-09 14:06:38 +0100408out:
Steven Whitehouse194c0112011-05-09 14:06:38 +0100409 return error;
410}
411
Steven Whitehousef2741d92011-05-13 12:11:17 +0100412static void gfs2_init_dir(struct buffer_head *dibh,
413 const struct gfs2_inode *parent)
Steven Whitehousee2d0a132011-05-13 09:55:55 +0100414{
415 struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data;
416 struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1);
417
418 gfs2_qstr2dirent(&gfs2_qdot, GFS2_DIRENT_SIZE(gfs2_qdot.len), dent);
419 dent->de_inum = di->di_num; /* already GFS2 endian */
420 dent->de_type = cpu_to_be16(DT_DIR);
421
422 dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1));
423 gfs2_qstr2dirent(&gfs2_qdotdot, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent);
424 gfs2_inum_out(parent, dent);
425 dent->de_type = cpu_to_be16(DT_DIR);
426
427}
428
Steven Whitehouse194c0112011-05-09 14:06:38 +0100429/**
430 * init_dinode - Fill in a new dinode structure
Steven Whitehousef2741d92011-05-13 12:11:17 +0100431 * @dip: The directory this inode is being created in
Steven Whitehousec9aecf72012-10-31 10:30:22 +0000432 * @ip: The inode
Steven Whitehousef2741d92011-05-13 12:11:17 +0100433 * @symname: The symlink destination (if a symlink)
Steven Whitehousef2741d92011-05-13 12:11:17 +0100434 * @bhp: The buffer head (returned to caller)
Steven Whitehouse194c0112011-05-09 14:06:38 +0100435 *
436 */
437
Steven Whitehousec9aecf72012-10-31 10:30:22 +0000438static void init_dinode(struct gfs2_inode *dip, struct gfs2_inode *ip,
Steven Whitehouse79ba7482013-03-01 09:29:12 +0000439 const char *symname)
Steven Whitehouse194c0112011-05-09 14:06:38 +0100440{
Steven Whitehouse194c0112011-05-09 14:06:38 +0100441 struct gfs2_dinode *di;
442 struct buffer_head *dibh;
Steven Whitehouse194c0112011-05-09 14:06:38 +0100443
Steven Whitehousec9aecf72012-10-31 10:30:22 +0000444 dibh = gfs2_meta_new(ip->i_gl, ip->i_no_addr);
Steven Whitehouse350a9b02012-12-14 12:36:02 +0000445 gfs2_trans_add_meta(ip->i_gl, dibh);
Steven Whitehouse194c0112011-05-09 14:06:38 +0100446 di = (struct gfs2_dinode *)dibh->b_data;
Steven Whitehouse79ba7482013-03-01 09:29:12 +0000447 gfs2_dinode_out(ip, di);
Steven Whitehouse194c0112011-05-09 14:06:38 +0100448
Steven Whitehousec9aecf72012-10-31 10:30:22 +0000449 di->di_major = cpu_to_be32(MAJOR(ip->i_inode.i_rdev));
450 di->di_minor = cpu_to_be32(MINOR(ip->i_inode.i_rdev));
Steven Whitehouse194c0112011-05-09 14:06:38 +0100451 di->__pad1 = 0;
Steven Whitehouse194c0112011-05-09 14:06:38 +0100452 di->__pad2 = 0;
453 di->__pad3 = 0;
Steven Whitehouse194c0112011-05-09 14:06:38 +0100454 memset(&di->__pad4, 0, sizeof(di->__pad4));
Steven Whitehouse194c0112011-05-09 14:06:38 +0100455 memset(&di->di_reserved, 0, sizeof(di->di_reserved));
Steven Whitehouse79ba7482013-03-01 09:29:12 +0000456 gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode));
Steven Whitehouse160b4022011-05-13 10:34:59 +0100457
Steven Whitehousec9aecf72012-10-31 10:30:22 +0000458 switch(ip->i_inode.i_mode & S_IFMT) {
Steven Whitehouse160b4022011-05-13 10:34:59 +0100459 case S_IFDIR:
Steven Whitehousee2d0a132011-05-13 09:55:55 +0100460 gfs2_init_dir(dibh, dip);
Steven Whitehouse160b4022011-05-13 10:34:59 +0100461 break;
462 case S_IFLNK:
Steven Whitehousec9aecf72012-10-31 10:30:22 +0000463 memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, ip->i_inode.i_size);
Steven Whitehouse160b4022011-05-13 10:34:59 +0100464 break;
Steven Whitehousee2d0a132011-05-13 09:55:55 +0100465 }
466
Steven Whitehouse194c0112011-05-09 14:06:38 +0100467 set_buffer_uptodate(dibh);
Steven Whitehouse79ba7482013-03-01 09:29:12 +0000468 brelse(dibh);
Steven Whitehouse194c0112011-05-09 14:06:38 +0100469}
470
Steven Whitehouse194c0112011-05-09 14:06:38 +0100471static int link_dinode(struct gfs2_inode *dip, const struct qstr *name,
Steven Whitehousefd4b4e02013-02-26 16:15:20 +0000472 struct gfs2_inode *ip, int arq)
Steven Whitehouse194c0112011-05-09 14:06:38 +0100473{
474 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
Steven Whitehouse194c0112011-05-09 14:06:38 +0100475 int error;
476
Steven Whitehousefd4b4e02013-02-26 16:15:20 +0000477 if (arq) {
Steven Whitehouse28fb3022013-02-26 19:09:35 +0000478 error = gfs2_quota_lock_check(dip);
Steven Whitehouse194c0112011-05-09 14:06:38 +0100479 if (error)
480 goto fail_quota_locks;
481
Steven Whitehouse9dbe9612012-10-31 10:37:10 +0000482 error = gfs2_inplace_reserve(dip, sdp->sd_max_dirres, 0);
Steven Whitehouse194c0112011-05-09 14:06:38 +0100483 if (error)
484 goto fail_quota_locks;
485
486 error = gfs2_trans_begin(sdp, sdp->sd_max_dirres +
Steven Whitehouse54335b12011-09-01 13:31:59 +0100487 dip->i_rgd->rd_length +
Steven Whitehouse194c0112011-05-09 14:06:38 +0100488 2 * RES_DINODE +
489 RES_STATFS + RES_QUOTA, 0);
490 if (error)
491 goto fail_ipreserv;
492 } else {
493 error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0);
494 if (error)
495 goto fail_quota_locks;
496 }
497
498 error = gfs2_dir_add(&dip->i_inode, name, ip);
499 if (error)
500 goto fail_end_trans;
501
Steven Whitehouse194c0112011-05-09 14:06:38 +0100502fail_end_trans:
503 gfs2_trans_end(sdp);
Steven Whitehouse194c0112011-05-09 14:06:38 +0100504fail_ipreserv:
Steven Whitehousefd4b4e02013-02-26 16:15:20 +0000505 gfs2_inplace_release(dip);
Steven Whitehouse194c0112011-05-09 14:06:38 +0100506fail_quota_locks:
507 gfs2_quota_unlock(dip);
Steven Whitehouse194c0112011-05-09 14:06:38 +0100508 return error;
509}
510
H Hartley Sweeten46cc1e52011-09-23 15:51:32 -0700511static int gfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array,
Mimi Zohar9d8f13b2011-06-06 15:29:25 -0400512 void *fs_info)
513{
514 const struct xattr *xattr;
515 int err = 0;
516
517 for (xattr = xattr_array; xattr->name != NULL; xattr++) {
518 err = __gfs2_xattr_set(inode, xattr->name, xattr->value,
519 xattr->value_len, 0,
520 GFS2_EATYPE_SECURITY);
521 if (err < 0)
522 break;
523 }
524 return err;
525}
526
Steven Whitehouse194c0112011-05-09 14:06:38 +0100527static int gfs2_security_init(struct gfs2_inode *dip, struct gfs2_inode *ip,
528 const struct qstr *qstr)
529{
Mimi Zohar9d8f13b2011-06-06 15:29:25 -0400530 return security_inode_init_security(&ip->i_inode, &dip->i_inode, qstr,
531 &gfs2_initxattrs, NULL);
Steven Whitehouse194c0112011-05-09 14:06:38 +0100532}
533
534/**
Steven Whitehousef2741d92011-05-13 12:11:17 +0100535 * gfs2_create_inode - Create a new inode
536 * @dir: The parent directory
537 * @dentry: The new dentry
Steven Whitehouse6d4ade92013-06-14 11:17:15 +0100538 * @file: If non-NULL, the file which is being opened
Steven Whitehousef2741d92011-05-13 12:11:17 +0100539 * @mode: The permissions on the new inode
540 * @dev: For device nodes, this is the device number
541 * @symname: For symlinks, this is the link destination
542 * @size: The initial size of the inode (ignored for directories)
Steven Whitehouse194c0112011-05-09 14:06:38 +0100543 *
Steven Whitehousef2741d92011-05-13 12:11:17 +0100544 * Returns: 0 on success, or error code
Steven Whitehouse194c0112011-05-09 14:06:38 +0100545 */
546
Steven Whitehousef2741d92011-05-13 12:11:17 +0100547static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
Steven Whitehouse6d4ade92013-06-14 11:17:15 +0100548 struct file *file,
Al Viro175a4eb2011-07-26 03:30:54 -0400549 umode_t mode, dev_t dev, const char *symname,
Steven Whitehouse6d4ade92013-06-14 11:17:15 +0100550 unsigned int size, int excl, int *opened)
Steven Whitehouse194c0112011-05-09 14:06:38 +0100551{
Steven Whitehousef2741d92011-05-13 12:11:17 +0100552 const struct qstr *name = &dentry->d_name;
553 struct gfs2_holder ghs[2];
Steven Whitehouse194c0112011-05-09 14:06:38 +0100554 struct inode *inode = NULL;
Bob Peterson8e2e0042012-07-19 08:12:40 -0400555 struct gfs2_inode *dip = GFS2_I(dir), *ip;
Steven Whitehouse194c0112011-05-09 14:06:38 +0100556 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
Steven Whitehousec9aecf72012-10-31 10:30:22 +0000557 struct gfs2_glock *io_gl;
Steven Whitehouse6d4ade92013-06-14 11:17:15 +0100558 struct dentry *d;
Steven Whitehouse194c0112011-05-09 14:06:38 +0100559 int error;
Steven Whitehouse9dbe9612012-10-31 10:37:10 +0000560 u32 aflags = 0;
Steven Whitehousefd4b4e02013-02-26 16:15:20 +0000561 int arq;
Steven Whitehouse194c0112011-05-09 14:06:38 +0100562
563 if (!name->len || name->len > GFS2_FNAMESIZE)
Steven Whitehousef2741d92011-05-13 12:11:17 +0100564 return -ENAMETOOLONG;
Steven Whitehouse194c0112011-05-09 14:06:38 +0100565
Bob Peterson0a305e42012-06-06 11:17:59 +0100566 error = gfs2_rs_alloc(dip);
567 if (error)
568 return error;
569
Steven Whitehousefd4b4e02013-02-26 16:15:20 +0000570 error = gfs2_rindex_update(sdp);
571 if (error)
572 return error;
573
Steven Whitehousef2741d92011-05-13 12:11:17 +0100574 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
Steven Whitehouse194c0112011-05-09 14:06:38 +0100575 if (error)
576 goto fail;
577
578 error = create_ok(dip, name, mode);
579 if (error)
580 goto fail_gunlock;
581
Steven Whitehouse5a00f3c2013-06-11 13:45:29 +0100582 inode = gfs2_dir_search(dir, &dentry->d_name, !S_ISREG(mode) || excl);
583 error = PTR_ERR(inode);
584 if (!IS_ERR(inode)) {
Steven Whitehouse6d4ade92013-06-14 11:17:15 +0100585 d = d_splice_alias(inode, dentry);
586 error = 0;
587 if (file && !IS_ERR(d)) {
588 if (d == NULL)
589 d = dentry;
590 if (S_ISREG(inode->i_mode))
591 error = finish_open(file, d, gfs2_open_common, opened);
592 else
593 error = finish_no_open(file, d);
594 }
Steven Whitehouse5a00f3c2013-06-11 13:45:29 +0100595 gfs2_glock_dq_uninit(ghs);
Steven Whitehouse6d4ade92013-06-14 11:17:15 +0100596 if (IS_ERR(d))
Steven Whitehouse2523d472013-07-17 08:11:32 +0100597 return PTR_ERR(d);
Steven Whitehouse6d4ade92013-06-14 11:17:15 +0100598 return error;
Steven Whitehouse5a00f3c2013-06-11 13:45:29 +0100599 } else if (error != -ENOENT) {
600 goto fail_gunlock;
601 }
602
Steven Whitehousefd4b4e02013-02-26 16:15:20 +0000603 arq = error = gfs2_diradd_alloc_required(dir, name);
604 if (error < 0)
605 goto fail_gunlock;
606
Steven Whitehousec9aecf72012-10-31 10:30:22 +0000607 inode = new_inode(sdp->sd_vfs);
Steven Whitehousefd4b4e02013-02-26 16:15:20 +0000608 error = -ENOMEM;
609 if (!inode)
610 goto fail_gunlock;
611
Bob Peterson8e2e0042012-07-19 08:12:40 -0400612 ip = GFS2_I(inode);
Steven Whitehouseff7f4cb2012-09-10 10:03:50 +0100613 error = gfs2_rs_alloc(ip);
614 if (error)
Steven Whitehousec9aecf72012-10-31 10:30:22 +0000615 goto fail_free_inode;
616
Steven Whitehousec9aecf72012-10-31 10:30:22 +0000617 inode->i_mode = mode;
Steven Whitehouse79ba7482013-03-01 09:29:12 +0000618 set_nlink(inode, S_ISDIR(mode) ? 2 : 1);
Steven Whitehousec9aecf72012-10-31 10:30:22 +0000619 inode->i_rdev = dev;
620 inode->i_size = size;
Steven Whitehousefd4b4e02013-02-26 16:15:20 +0000621 inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
Steven Whitehouse28fb3022013-02-26 19:09:35 +0000622 gfs2_set_inode_blocks(inode, 1);
Steven Whitehousec9aecf72012-10-31 10:30:22 +0000623 munge_mode_uid_gid(dip, inode);
624 ip->i_goal = dip->i_goal;
Steven Whitehouse28fb3022013-02-26 19:09:35 +0000625 ip->i_diskflags = 0;
626 ip->i_eattr = 0;
627 ip->i_height = 0;
628 ip->i_depth = 0;
629 ip->i_entries = 0;
630
631 switch(mode & S_IFMT) {
632 case S_IFREG:
633 if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) ||
634 gfs2_tune_get(sdp, gt_new_files_jdata))
635 ip->i_diskflags |= GFS2_DIF_JDATA;
636 gfs2_set_aops(inode);
637 break;
638 case S_IFDIR:
639 ip->i_diskflags |= (dip->i_diskflags & GFS2_DIF_INHERIT_JDATA);
640 ip->i_diskflags |= GFS2_DIF_JDATA;
641 ip->i_entries = 2;
642 break;
643 }
644 gfs2_set_inode_flags(inode);
Steven Whitehousec9aecf72012-10-31 10:30:22 +0000645
Steven Whitehouse9dbe9612012-10-31 10:37:10 +0000646 if ((GFS2_I(sdp->sd_root_dir->d_inode) == dip) ||
647 (dip->i_diskflags & GFS2_DIF_TOPDIR))
648 aflags |= GFS2_AF_ORLOV;
649
650 error = alloc_dinode(ip, aflags);
Steven Whitehousec9aecf72012-10-31 10:30:22 +0000651 if (error)
652 goto fail_free_inode;
653
654 error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl);
655 if (error)
656 goto fail_free_inode;
657
Bob Peterson1e2d9d42012-11-21 09:56:00 -0500658 ip->i_gl->gl_object = ip;
Steven Whitehousec9aecf72012-10-31 10:30:22 +0000659 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1);
660 if (error)
661 goto fail_free_inode;
662
Steven Whitehousefd4b4e02013-02-26 16:15:20 +0000663 error = gfs2_trans_begin(sdp, RES_DINODE, 0);
Steven Whitehousec9aecf72012-10-31 10:30:22 +0000664 if (error)
Steven Whitehouseff7f4cb2012-09-10 10:03:50 +0100665 goto fail_gunlock2;
Bob Peterson0a305e42012-06-06 11:17:59 +0100666
Steven Whitehouse79ba7482013-03-01 09:29:12 +0000667 init_dinode(dip, ip, symname);
Steven Whitehousefd4b4e02013-02-26 16:15:20 +0000668 gfs2_trans_end(sdp);
669
Steven Whitehousec9aecf72012-10-31 10:30:22 +0000670 error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
671 if (error)
672 goto fail_gunlock2;
673
674 error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
675 if (error)
676 goto fail_gunlock2;
677
678 ip->i_iopen_gh.gh_gl->gl_object = ip;
679 gfs2_glock_put(io_gl);
680 gfs2_set_iop(inode);
681 insert_inode_hash(inode);
682
Steven Whitehouse194c0112011-05-09 14:06:38 +0100683 error = gfs2_acl_create(dip, inode);
684 if (error)
Steven Whitehousec9aecf72012-10-31 10:30:22 +0000685 goto fail_gunlock3;
Steven Whitehouse194c0112011-05-09 14:06:38 +0100686
Bob Peterson8e2e0042012-07-19 08:12:40 -0400687 error = gfs2_security_init(dip, ip, name);
Steven Whitehouse194c0112011-05-09 14:06:38 +0100688 if (error)
Steven Whitehousec9aecf72012-10-31 10:30:22 +0000689 goto fail_gunlock3;
Steven Whitehouse194c0112011-05-09 14:06:38 +0100690
Steven Whitehousefd4b4e02013-02-26 16:15:20 +0000691 error = link_dinode(dip, name, ip, arq);
Steven Whitehouse194c0112011-05-09 14:06:38 +0100692 if (error)
Steven Whitehousec9aecf72012-10-31 10:30:22 +0000693 goto fail_gunlock3;
Steven Whitehouse194c0112011-05-09 14:06:38 +0100694
Steven Whitehouse79ba7482013-03-01 09:29:12 +0000695 mark_inode_dirty(inode);
Steven Whitehouse6d4ade92013-06-14 11:17:15 +0100696 d_instantiate(dentry, inode);
697 if (file)
698 error = finish_open(file, dentry, gfs2_open_common, opened);
Steven Whitehouse28fb3022013-02-26 19:09:35 +0000699 gfs2_glock_dq_uninit(ghs);
700 gfs2_glock_dq_uninit(ghs + 1);
Steven Whitehouse6d4ade92013-06-14 11:17:15 +0100701 return error;
Steven Whitehouse194c0112011-05-09 14:06:38 +0100702
Steven Whitehousec9aecf72012-10-31 10:30:22 +0000703fail_gunlock3:
704 gfs2_glock_dq_uninit(ghs + 1);
705 if (ip->i_gl)
706 gfs2_glock_put(ip->i_gl);
707 goto fail_gunlock;
708
Steven Whitehouse194c0112011-05-09 14:06:38 +0100709fail_gunlock2:
710 gfs2_glock_dq_uninit(ghs + 1);
Steven Whitehousec9aecf72012-10-31 10:30:22 +0000711fail_free_inode:
712 if (ip->i_gl)
713 gfs2_glock_put(ip->i_gl);
714 gfs2_rs_delete(ip);
715 free_inode_nonrcu(inode);
716 inode = NULL;
Steven Whitehouse194c0112011-05-09 14:06:38 +0100717fail_gunlock:
Steven Whitehousef2741d92011-05-13 12:11:17 +0100718 gfs2_glock_dq_uninit(ghs);
Steven Whitehouse40ac2182011-08-02 13:17:27 +0100719 if (inode && !IS_ERR(inode)) {
Steven Whitehouse79ba7482013-03-01 09:29:12 +0000720 clear_nlink(inode);
721 mark_inode_dirty(inode);
Steven Whitehouse40ac2182011-08-02 13:17:27 +0100722 set_bit(GIF_ALLOC_FAILED, &GFS2_I(inode)->i_flags);
723 iput(inode);
724 }
Steven Whitehouse194c0112011-05-09 14:06:38 +0100725fail:
Steven Whitehousef2741d92011-05-13 12:11:17 +0100726 return error;
Steven Whitehouse194c0112011-05-09 14:06:38 +0100727}
Steven Whitehousef2741d92011-05-13 12:11:17 +0100728
David Teiglandb3b94fa2006-01-16 16:50:04 +0000729/**
730 * gfs2_create - Create a file
731 * @dir: The directory in which to create the file
732 * @dentry: The dentry of the new file
733 * @mode: The mode of the new file
734 *
735 * Returns: errno
736 */
737
738static int gfs2_create(struct inode *dir, struct dentry *dentry,
Al Viroebfc3b42012-06-10 18:05:36 -0400739 umode_t mode, bool excl)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000740{
Steven Whitehouse6d4ade92013-06-14 11:17:15 +0100741 return gfs2_create_inode(dir, dentry, NULL, S_IFREG | mode, 0, NULL, 0, excl, NULL);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000742}
743
744/**
Steven Whitehouse6d4ade92013-06-14 11:17:15 +0100745 * __gfs2_lookup - Look up a filename in a directory and return its inode
David Teiglandb3b94fa2006-01-16 16:50:04 +0000746 * @dir: The directory inode
747 * @dentry: The dentry of the new inode
Steven Whitehouse6d4ade92013-06-14 11:17:15 +0100748 * @file: File to be opened
749 * @opened: atomic_open flags
David Teiglandb3b94fa2006-01-16 16:50:04 +0000750 *
David Teiglandb3b94fa2006-01-16 16:50:04 +0000751 *
752 * Returns: errno
753 */
754
Steven Whitehouse6d4ade92013-06-14 11:17:15 +0100755static struct dentry *__gfs2_lookup(struct inode *dir, struct dentry *dentry,
756 struct file *file, int *opened)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000757{
Steven Whitehouse6d4ade92013-06-14 11:17:15 +0100758 struct inode *inode;
759 struct dentry *d;
760 struct gfs2_holder gh;
761 struct gfs2_glock *gl;
762 int error;
763
764 inode = gfs2_lookupi(dir, &dentry->d_name, 0);
765 if (!inode)
766 return NULL;
767 if (IS_ERR(inode))
768 return ERR_CAST(inode);
769
770 gl = GFS2_I(inode)->i_gl;
771 error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
772 if (error) {
773 iput(inode);
774 return ERR_PTR(error);
Steven Whitehouse9656b2c2008-01-08 08:14:30 +0000775 }
Steven Whitehouse6d4ade92013-06-14 11:17:15 +0100776
777 d = d_splice_alias(inode, dentry);
778 if (file && S_ISREG(inode->i_mode))
779 error = finish_open(file, dentry, gfs2_open_common, opened);
780
781 gfs2_glock_dq_uninit(&gh);
782 if (error)
783 return ERR_PTR(error);
784 return d;
785}
786
787static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry,
788 unsigned flags)
789{
790 return __gfs2_lookup(dir, dentry, NULL, NULL);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000791}
792
793/**
794 * gfs2_link - Link to a file
795 * @old_dentry: The inode to link
796 * @dir: Add link to this directory
797 * @dentry: The name of the link
798 *
799 * Link the inode in "old_dentry" into the directory "dir" with the
800 * name in "dentry".
801 *
802 * Returns: errno
803 */
804
805static int gfs2_link(struct dentry *old_dentry, struct inode *dir,
806 struct dentry *dentry)
807{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400808 struct gfs2_inode *dip = GFS2_I(dir);
809 struct gfs2_sbd *sdp = GFS2_SB(dir);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000810 struct inode *inode = old_dentry->d_inode;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400811 struct gfs2_inode *ip = GFS2_I(inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000812 struct gfs2_holder ghs[2];
Steven Whitehouse2baee032011-05-09 12:08:36 +0100813 struct buffer_head *dibh;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000814 int alloc_required;
815 int error;
816
Steven Whitehouseb60623c2006-11-01 12:22:46 -0500817 if (S_ISDIR(inode->i_mode))
David Teiglandb3b94fa2006-01-16 16:50:04 +0000818 return -EPERM;
819
Bob Peterson0a305e42012-06-06 11:17:59 +0100820 error = gfs2_rs_alloc(dip);
821 if (error)
822 return error;
823
David Teiglandb3b94fa2006-01-16 16:50:04 +0000824 gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
825 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
826
Bob Peterson72dbf472008-08-12 13:39:29 -0500827 error = gfs2_glock_nq(ghs); /* parent */
David Teiglandb3b94fa2006-01-16 16:50:04 +0000828 if (error)
Bob Peterson72dbf472008-08-12 13:39:29 -0500829 goto out_parent;
830
831 error = gfs2_glock_nq(ghs + 1); /* child */
832 if (error)
833 goto out_child;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000834
Steven Whitehoused192a8e2011-05-05 12:35:40 +0100835 error = -ENOENT;
836 if (inode->i_nlink == 0)
837 goto out_gunlock;
838
Al Viro10556cb2011-06-20 19:28:19 -0400839 error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000840 if (error)
841 goto out_gunlock;
842
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100843 error = gfs2_dir_check(dir, &dentry->d_name, NULL);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000844 switch (error) {
845 case -ENOENT:
846 break;
847 case 0:
848 error = -EEXIST;
849 default:
850 goto out_gunlock;
851 }
852
853 error = -EINVAL;
Steven Whitehouse4f561102006-11-01 14:04:17 -0500854 if (!dip->i_inode.i_nlink)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000855 goto out_gunlock;
856 error = -EFBIG;
Steven Whitehousead6203f2008-11-03 13:59:19 +0000857 if (dip->i_entries == (u32)-1)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000858 goto out_gunlock;
859 error = -EPERM;
860 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
861 goto out_gunlock;
862 error = -EINVAL;
Steven Whitehouse4f561102006-11-01 14:04:17 -0500863 if (!ip->i_inode.i_nlink)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000864 goto out_gunlock;
865 error = -EMLINK;
Steven Whitehouse4f561102006-11-01 14:04:17 -0500866 if (ip->i_inode.i_nlink == (u32)-1)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000867 goto out_gunlock;
868
Steven Whitehousec7526662006-03-20 12:30:04 -0500869 alloc_required = error = gfs2_diradd_alloc_required(dir, &dentry->d_name);
870 if (error < 0)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000871 goto out_gunlock;
Steven Whitehousec7526662006-03-20 12:30:04 -0500872 error = 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000873
874 if (alloc_required) {
Steven Whitehoused82661d2008-03-10 15:34:50 +0000875 error = gfs2_quota_lock_check(dip);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000876 if (error)
Bob Peterson5407e242012-05-18 09:28:23 -0400877 goto out_gunlock;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000878
Steven Whitehouse9dbe9612012-10-31 10:37:10 +0000879 error = gfs2_inplace_reserve(dip, sdp->sd_max_dirres, 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000880 if (error)
881 goto out_gunlock_q;
882
Steven Whitehouse1b502592006-05-18 14:10:52 -0400883 error = gfs2_trans_begin(sdp, sdp->sd_max_dirres +
Steven Whitehouse71f890f2012-07-30 14:53:19 +0100884 gfs2_rg_blocks(dip, sdp->sd_max_dirres) +
David Teiglandb3b94fa2006-01-16 16:50:04 +0000885 2 * RES_DINODE + RES_STATFS +
886 RES_QUOTA, 0);
887 if (error)
888 goto out_ipres;
889 } else {
890 error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0);
891 if (error)
892 goto out_ipres;
893 }
894
Steven Whitehouse2baee032011-05-09 12:08:36 +0100895 error = gfs2_meta_inode_buffer(ip, &dibh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000896 if (error)
897 goto out_end_trans;
898
Steven Whitehouse3d6ecb72011-05-09 13:30:08 +0100899 error = gfs2_dir_add(dir, &dentry->d_name, ip);
Steven Whitehouse2baee032011-05-09 12:08:36 +0100900 if (error)
901 goto out_brelse;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000902
Steven Whitehouse350a9b02012-12-14 12:36:02 +0000903 gfs2_trans_add_meta(ip->i_gl, dibh);
Steven Whitehouse2baee032011-05-09 12:08:36 +0100904 inc_nlink(&ip->i_inode);
905 ip->i_inode.i_ctime = CURRENT_TIME;
Steven Whitehouseab9bbda2011-08-15 14:20:36 +0100906 ihold(inode);
907 d_instantiate(dentry, inode);
908 mark_inode_dirty(inode);
Steven Whitehouse2baee032011-05-09 12:08:36 +0100909
910out_brelse:
911 brelse(dibh);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400912out_end_trans:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000913 gfs2_trans_end(sdp);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400914out_ipres:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000915 if (alloc_required)
916 gfs2_inplace_release(dip);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400917out_gunlock_q:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000918 if (alloc_required)
919 gfs2_quota_unlock(dip);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400920out_gunlock:
Bob Peterson72dbf472008-08-12 13:39:29 -0500921 gfs2_glock_dq(ghs + 1);
922out_child:
923 gfs2_glock_dq(ghs);
924out_parent:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000925 gfs2_holder_uninit(ghs);
926 gfs2_holder_uninit(ghs + 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000927 return error;
928}
929
Steven Whitehouse87ec2172009-05-22 10:54:50 +0100930/*
931 * gfs2_unlink_ok - check to see that a inode is still in a directory
932 * @dip: the directory
933 * @name: the name of the file
934 * @ip: the inode
935 *
936 * Assumes that the lock on (at least) @dip is held.
937 *
938 * Returns: 0 if the parent/child relationship is correct, errno if it isn't
939 */
940
941static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name,
942 const struct gfs2_inode *ip)
943{
944 int error;
945
946 if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode))
947 return -EPERM;
948
949 if ((dip->i_inode.i_mode & S_ISVTX) &&
Eric W. Biederman6b24c0d2013-01-31 21:56:13 -0800950 !uid_eq(dip->i_inode.i_uid, current_fsuid()) &&
951 !uid_eq(ip->i_inode.i_uid, current_fsuid()) && !capable(CAP_FOWNER))
Steven Whitehouse87ec2172009-05-22 10:54:50 +0100952 return -EPERM;
953
954 if (IS_APPEND(&dip->i_inode))
955 return -EPERM;
956
Al Viro10556cb2011-06-20 19:28:19 -0400957 error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC);
Steven Whitehouse87ec2172009-05-22 10:54:50 +0100958 if (error)
959 return error;
960
961 error = gfs2_dir_check(&dip->i_inode, name, ip);
962 if (error)
963 return error;
964
965 return 0;
966}
967
David Teiglandb3b94fa2006-01-16 16:50:04 +0000968/**
Steven Whitehouse855d23c2011-05-09 16:42:37 +0100969 * gfs2_unlink_inode - Removes an inode from its parent dir and unlinks it
970 * @dip: The parent directory
971 * @name: The name of the entry in the parent directory
Steven Whitehouse855d23c2011-05-09 16:42:37 +0100972 * @inode: The inode to be removed
973 *
974 * Called with all the locks and in a transaction. This will only be
975 * called for a directory after it has been checked to ensure it is empty.
976 *
977 * Returns: 0 on success, or an error
978 */
979
980static int gfs2_unlink_inode(struct gfs2_inode *dip,
Bob Peterson4327a9b2012-11-12 13:03:29 -0500981 const struct dentry *dentry)
Steven Whitehouse855d23c2011-05-09 16:42:37 +0100982{
983 struct inode *inode = dentry->d_inode;
984 struct gfs2_inode *ip = GFS2_I(inode);
985 int error;
986
987 error = gfs2_dir_del(dip, dentry);
988 if (error)
989 return error;
990
991 ip->i_entries = 0;
992 inode->i_ctime = CURRENT_TIME;
993 if (S_ISDIR(inode->i_mode))
994 clear_nlink(inode);
995 else
996 drop_nlink(inode);
Steven Whitehouse855d23c2011-05-09 16:42:37 +0100997 mark_inode_dirty(inode);
998 if (inode->i_nlink == 0)
999 gfs2_unlink_di(inode);
1000 return 0;
1001}
1002
1003
1004/**
1005 * gfs2_unlink - Unlink an inode (this does rmdir as well)
1006 * @dir: The inode of the directory containing the inode to unlink
David Teiglandb3b94fa2006-01-16 16:50:04 +00001007 * @dentry: The file itself
1008 *
Steven Whitehouse855d23c2011-05-09 16:42:37 +01001009 * This routine uses the type of the inode as a flag to figure out
1010 * whether this is an unlink or an rmdir.
David Teiglandb3b94fa2006-01-16 16:50:04 +00001011 *
1012 * Returns: errno
1013 */
1014
1015static int gfs2_unlink(struct inode *dir, struct dentry *dentry)
1016{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001017 struct gfs2_inode *dip = GFS2_I(dir);
1018 struct gfs2_sbd *sdp = GFS2_SB(dir);
Steven Whitehouse855d23c2011-05-09 16:42:37 +01001019 struct inode *inode = dentry->d_inode;
1020 struct gfs2_inode *ip = GFS2_I(inode);
Russell Cattelanddee7602007-01-29 17:13:44 -06001021 struct gfs2_holder ghs[3];
1022 struct gfs2_rgrpd *rgd;
Bob Peterson5e2f7d62012-04-04 22:11:16 -04001023 int error;
1024
1025 error = gfs2_rindex_update(sdp);
1026 if (error)
1027 return error;
1028
1029 error = -EROFS;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001030
Russell Cattelanddee7602007-01-29 17:13:44 -06001031 gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
1032 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
1033
Steven Whitehouse66fc0612012-02-08 12:58:32 +00001034 rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1);
Steven Whitehousea365fbf2012-02-24 15:09:14 +00001035 if (!rgd)
Steven Whitehouse87654892011-11-08 14:04:20 +00001036 goto out_inodes;
Steven Whitehousea365fbf2012-02-24 15:09:14 +00001037
Russell Cattelanddee7602007-01-29 17:13:44 -06001038 gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2);
1039
1040
Steven Whitehouse8497a462007-08-26 14:23:56 +01001041 error = gfs2_glock_nq(ghs); /* parent */
David Teiglandb3b94fa2006-01-16 16:50:04 +00001042 if (error)
Steven Whitehouse8497a462007-08-26 14:23:56 +01001043 goto out_parent;
1044
1045 error = gfs2_glock_nq(ghs + 1); /* child */
1046 if (error)
1047 goto out_child;
1048
Steven Whitehoused192a8e2011-05-05 12:35:40 +01001049 error = -ENOENT;
Steven Whitehouse855d23c2011-05-09 16:42:37 +01001050 if (inode->i_nlink == 0)
Steven Whitehoused192a8e2011-05-05 12:35:40 +01001051 goto out_rgrp;
1052
Steven Whitehouse855d23c2011-05-09 16:42:37 +01001053 if (S_ISDIR(inode->i_mode)) {
1054 error = -ENOTEMPTY;
1055 if (ip->i_entries > 2 || inode->i_nlink > 2)
1056 goto out_rgrp;
1057 }
1058
Steven Whitehouse8497a462007-08-26 14:23:56 +01001059 error = gfs2_glock_nq(ghs + 2); /* rgrp */
1060 if (error)
1061 goto out_rgrp;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001062
1063 error = gfs2_unlink_ok(dip, &dentry->d_name, ip);
1064 if (error)
Bob Peterson72dbf472008-08-12 13:39:29 -05001065 goto out_gunlock;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001066
Steven Whitehouse855d23c2011-05-09 16:42:37 +01001067 error = gfs2_trans_begin(sdp, 2*RES_DINODE + 3*RES_LEAF + RES_RG_BIT, 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001068 if (error)
Steven Whitehouse855d23c2011-05-09 16:42:37 +01001069 goto out_end_trans;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001070
Bob Peterson4327a9b2012-11-12 13:03:29 -05001071 error = gfs2_unlink_inode(dip, dentry);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001072
1073out_end_trans:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001074 gfs2_trans_end(sdp);
Bob Peterson72dbf472008-08-12 13:39:29 -05001075out_gunlock:
Steven Whitehouse8497a462007-08-26 14:23:56 +01001076 gfs2_glock_dq(ghs + 2);
1077out_rgrp:
Steven Whitehouse8497a462007-08-26 14:23:56 +01001078 gfs2_glock_dq(ghs + 1);
1079out_child:
Steven Whitehouse8497a462007-08-26 14:23:56 +01001080 gfs2_glock_dq(ghs);
1081out_parent:
Steven Whitehouse87654892011-11-08 14:04:20 +00001082 gfs2_holder_uninit(ghs + 2);
1083out_inodes:
1084 gfs2_holder_uninit(ghs + 1);
Steven Whitehouse8497a462007-08-26 14:23:56 +01001085 gfs2_holder_uninit(ghs);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001086 return error;
1087}
1088
1089/**
1090 * gfs2_symlink - Create a symlink
1091 * @dir: The directory to create the symlink in
1092 * @dentry: The dentry to put the symlink in
1093 * @symname: The thing which the link points to
1094 *
1095 * Returns: errno
1096 */
1097
1098static int gfs2_symlink(struct inode *dir, struct dentry *dentry,
1099 const char *symname)
1100{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001101 struct gfs2_sbd *sdp = GFS2_SB(dir);
Steven Whitehouse160b4022011-05-13 10:34:59 +01001102 unsigned int size;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001103
David Teiglandb3b94fa2006-01-16 16:50:04 +00001104 size = strlen(symname);
1105 if (size > sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode) - 1)
1106 return -ENAMETOOLONG;
1107
Steven Whitehouse6d4ade92013-06-14 11:17:15 +01001108 return gfs2_create_inode(dir, dentry, NULL, S_IFLNK | S_IRWXUGO, 0, symname, size, 0, NULL);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001109}
1110
1111/**
1112 * gfs2_mkdir - Make a directory
1113 * @dir: The parent directory of the new one
1114 * @dentry: The dentry of the new directory
1115 * @mode: The mode of the new directory
1116 *
1117 * Returns: errno
1118 */
1119
Al Viro18bb1db2011-07-26 01:41:39 -04001120static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001121{
Steven Whitehouse28fb3022013-02-26 19:09:35 +00001122 struct gfs2_sbd *sdp = GFS2_SB(dir);
1123 unsigned dsize = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode);
Steven Whitehouse6d4ade92013-06-14 11:17:15 +01001124 return gfs2_create_inode(dir, dentry, NULL, S_IFDIR | mode, 0, NULL, dsize, 0, NULL);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001125}
1126
1127/**
David Teiglandb3b94fa2006-01-16 16:50:04 +00001128 * gfs2_mknod - Make a special file
1129 * @dir: The directory in which the special file will reside
1130 * @dentry: The dentry of the special file
1131 * @mode: The mode of the special file
Steven Whitehousef2741d92011-05-13 12:11:17 +01001132 * @dev: The device specification of the special file
David Teiglandb3b94fa2006-01-16 16:50:04 +00001133 *
1134 */
1135
Al Viro1a67aaf2011-07-26 01:52:52 -04001136static int gfs2_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,
David Teiglandb3b94fa2006-01-16 16:50:04 +00001137 dev_t dev)
1138{
Steven Whitehouse6d4ade92013-06-14 11:17:15 +01001139 return gfs2_create_inode(dir, dentry, NULL, mode, dev, NULL, 0, 0, NULL);
1140}
1141
1142/**
1143 * gfs2_atomic_open - Atomically open a file
1144 * @dir: The directory
1145 * @dentry: The proposed new entry
1146 * @file: The proposed new struct file
1147 * @flags: open flags
1148 * @mode: File mode
1149 * @opened: Flag to say whether the file has been opened or not
1150 *
1151 * Returns: error code or 0 for success
1152 */
1153
1154static int gfs2_atomic_open(struct inode *dir, struct dentry *dentry,
1155 struct file *file, unsigned flags,
1156 umode_t mode, int *opened)
1157{
1158 struct dentry *d;
1159 bool excl = !!(flags & O_EXCL);
1160
1161 d = __gfs2_lookup(dir, dentry, file, opened);
1162 if (IS_ERR(d))
1163 return PTR_ERR(d);
1164 if (d == NULL)
1165 d = dentry;
1166 if (d->d_inode) {
1167 if (!(*opened & FILE_OPENED))
1168 return finish_no_open(file, d);
1169 return 0;
1170 }
1171
1172 if (!(flags & O_CREAT))
1173 return -ENOENT;
1174
1175 return gfs2_create_inode(dir, dentry, file, S_IFREG | mode, 0, NULL, 0, excl, opened);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001176}
1177
Steven Whitehouse0188d6c2008-08-26 09:38:26 +01001178/*
1179 * gfs2_ok_to_move - check if it's ok to move a directory to another directory
1180 * @this: move this
1181 * @to: to here
1182 *
1183 * Follow @to back to the root and make sure we don't encounter @this
1184 * Assumes we already hold the rename lock.
1185 *
1186 * Returns: errno
1187 */
1188
1189static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to)
1190{
1191 struct inode *dir = &to->i_inode;
1192 struct super_block *sb = dir->i_sb;
1193 struct inode *tmp;
Steven Whitehouse0188d6c2008-08-26 09:38:26 +01001194 int error = 0;
1195
Steven Whitehouse0188d6c2008-08-26 09:38:26 +01001196 igrab(dir);
1197
1198 for (;;) {
1199 if (dir == &this->i_inode) {
1200 error = -EINVAL;
1201 break;
1202 }
1203 if (dir == sb->s_root->d_inode) {
1204 error = 0;
1205 break;
1206 }
1207
Steven Whitehouse8d123582010-09-17 12:30:23 +01001208 tmp = gfs2_lookupi(dir, &gfs2_qdotdot, 1);
Steven Whitehouse0188d6c2008-08-26 09:38:26 +01001209 if (IS_ERR(tmp)) {
1210 error = PTR_ERR(tmp);
1211 break;
1212 }
1213
1214 iput(dir);
1215 dir = tmp;
1216 }
1217
1218 iput(dir);
1219
1220 return error;
1221}
1222
David Teiglandb3b94fa2006-01-16 16:50:04 +00001223/**
1224 * gfs2_rename - Rename a file
1225 * @odir: Parent directory of old file name
1226 * @odentry: The old dentry of the file
1227 * @ndir: Parent directory of new file name
1228 * @ndentry: The new dentry of the file
1229 *
1230 * Returns: errno
1231 */
1232
1233static int gfs2_rename(struct inode *odir, struct dentry *odentry,
1234 struct inode *ndir, struct dentry *ndentry)
1235{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001236 struct gfs2_inode *odip = GFS2_I(odir);
1237 struct gfs2_inode *ndip = GFS2_I(ndir);
1238 struct gfs2_inode *ip = GFS2_I(odentry->d_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001239 struct gfs2_inode *nip = NULL;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001240 struct gfs2_sbd *sdp = GFS2_SB(odir);
Steven Whitehouse8339ee52011-08-31 16:38:29 +01001241 struct gfs2_holder ghs[5], r_gh = { .gh_gl = NULL, };
Russell Cattelanddee7602007-01-29 17:13:44 -06001242 struct gfs2_rgrpd *nrgd;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001243 unsigned int num_gh;
1244 int dir_rename = 0;
Steven Whitehouse24b977b2009-12-09 13:55:12 +00001245 int alloc_required = 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001246 unsigned int x;
1247 int error;
1248
David Teiglandb3b94fa2006-01-16 16:50:04 +00001249 if (ndentry->d_inode) {
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001250 nip = GFS2_I(ndentry->d_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001251 if (ip == nip)
1252 return 0;
1253 }
1254
Bob Peterson5e2f7d62012-04-04 22:11:16 -04001255 error = gfs2_rindex_update(sdp);
1256 if (error)
1257 return error;
1258
Bob Peterson0a305e42012-06-06 11:17:59 +01001259 error = gfs2_rs_alloc(ndip);
1260 if (error)
1261 return error;
1262
Steven Whitehouse0188d6c2008-08-26 09:38:26 +01001263 if (odip != ndip) {
1264 error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE,
1265 0, &r_gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001266 if (error)
1267 goto out;
1268
Steven Whitehouse0188d6c2008-08-26 09:38:26 +01001269 if (S_ISDIR(ip->i_inode.i_mode)) {
1270 dir_rename = 1;
1271 /* don't move a dirctory into it's subdir */
1272 error = gfs2_ok_to_move(ip, ndip);
1273 if (error)
1274 goto out_gunlock_r;
1275 }
David Teiglandb3b94fa2006-01-16 16:50:04 +00001276 }
1277
Steven Whitehoused9d1ca32006-06-21 15:38:17 -04001278 num_gh = 1;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001279 gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
Steven Whitehoused9d1ca32006-06-21 15:38:17 -04001280 if (odip != ndip) {
1281 gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1282 num_gh++;
1283 }
1284 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1285 num_gh++;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001286
Steven Whitehoused9d1ca32006-06-21 15:38:17 -04001287 if (nip) {
1288 gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
1289 num_gh++;
Russell Cattelanddee7602007-01-29 17:13:44 -06001290 /* grab the resource lock for unlink flag twiddling
1291 * this is the case of the target file already existing
1292 * so we unlink before doing the rename
1293 */
Steven Whitehouse66fc0612012-02-08 12:58:32 +00001294 nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr, 1);
Russell Cattelanddee7602007-01-29 17:13:44 -06001295 if (nrgd)
1296 gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++);
Steven Whitehoused9d1ca32006-06-21 15:38:17 -04001297 }
David Teiglandb3b94fa2006-01-16 16:50:04 +00001298
Bob Peterson72dbf472008-08-12 13:39:29 -05001299 for (x = 0; x < num_gh; x++) {
1300 error = gfs2_glock_nq(ghs + x);
1301 if (error)
1302 goto out_gunlock;
1303 }
David Teiglandb3b94fa2006-01-16 16:50:04 +00001304
Steven Whitehoused192a8e2011-05-05 12:35:40 +01001305 error = -ENOENT;
1306 if (ip->i_inode.i_nlink == 0)
1307 goto out_gunlock;
1308
David Teiglandb3b94fa2006-01-16 16:50:04 +00001309 /* Check out the old directory */
1310
1311 error = gfs2_unlink_ok(odip, &odentry->d_name, ip);
1312 if (error)
1313 goto out_gunlock;
1314
1315 /* Check out the new directory */
1316
1317 if (nip) {
1318 error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip);
1319 if (error)
1320 goto out_gunlock;
1321
Steven Whitehoused192a8e2011-05-05 12:35:40 +01001322 if (nip->i_inode.i_nlink == 0) {
1323 error = -EAGAIN;
1324 goto out_gunlock;
1325 }
1326
Steven Whitehouseb60623c2006-11-01 12:22:46 -05001327 if (S_ISDIR(nip->i_inode.i_mode)) {
Steven Whitehousead6203f2008-11-03 13:59:19 +00001328 if (nip->i_entries < 2) {
Steven Whitehouse94fb7632011-05-09 13:36:10 +01001329 gfs2_consist_inode(nip);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001330 error = -EIO;
1331 goto out_gunlock;
1332 }
Steven Whitehousead6203f2008-11-03 13:59:19 +00001333 if (nip->i_entries > 2) {
David Teiglandb3b94fa2006-01-16 16:50:04 +00001334 error = -ENOTEMPTY;
1335 goto out_gunlock;
1336 }
1337 }
1338 } else {
Al Viro10556cb2011-06-20 19:28:19 -04001339 error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001340 if (error)
1341 goto out_gunlock;
1342
Steven Whitehousedbb7cae2007-05-15 15:37:50 +01001343 error = gfs2_dir_check(ndir, &ndentry->d_name, NULL);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001344 switch (error) {
1345 case -ENOENT:
1346 error = 0;
1347 break;
1348 case 0:
1349 error = -EEXIST;
1350 default:
1351 goto out_gunlock;
1352 };
1353
1354 if (odip != ndip) {
Steven Whitehouse4f561102006-11-01 14:04:17 -05001355 if (!ndip->i_inode.i_nlink) {
Steven Whitehoused192a8e2011-05-05 12:35:40 +01001356 error = -ENOENT;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001357 goto out_gunlock;
1358 }
Steven Whitehousead6203f2008-11-03 13:59:19 +00001359 if (ndip->i_entries == (u32)-1) {
David Teiglandb3b94fa2006-01-16 16:50:04 +00001360 error = -EFBIG;
1361 goto out_gunlock;
1362 }
Steven Whitehouseb60623c2006-11-01 12:22:46 -05001363 if (S_ISDIR(ip->i_inode.i_mode) &&
Steven Whitehouse4f561102006-11-01 14:04:17 -05001364 ndip->i_inode.i_nlink == (u32)-1) {
David Teiglandb3b94fa2006-01-16 16:50:04 +00001365 error = -EMLINK;
1366 goto out_gunlock;
1367 }
1368 }
1369 }
1370
1371 /* Check out the dir to be renamed */
1372
1373 if (dir_rename) {
Al Viro10556cb2011-06-20 19:28:19 -04001374 error = gfs2_permission(odentry->d_inode, MAY_WRITE);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001375 if (error)
1376 goto out_gunlock;
1377 }
1378
Steven Whitehouse24b977b2009-12-09 13:55:12 +00001379 if (nip == NULL)
1380 alloc_required = gfs2_diradd_alloc_required(ndir, &ndentry->d_name);
1381 error = alloc_required;
Steven Whitehousec7526662006-03-20 12:30:04 -05001382 if (error < 0)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001383 goto out_gunlock;
1384
1385 if (alloc_required) {
Steven Whitehoused82661d2008-03-10 15:34:50 +00001386 error = gfs2_quota_lock_check(ndip);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001387 if (error)
Bob Peterson5407e242012-05-18 09:28:23 -04001388 goto out_gunlock;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001389
Steven Whitehouse9dbe9612012-10-31 10:37:10 +00001390 error = gfs2_inplace_reserve(ndip, sdp->sd_max_dirres, 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001391 if (error)
1392 goto out_gunlock_q;
1393
Steven Whitehousefe1bded2006-04-18 10:09:15 -04001394 error = gfs2_trans_begin(sdp, sdp->sd_max_dirres +
Steven Whitehouse71f890f2012-07-30 14:53:19 +01001395 gfs2_rg_blocks(ndip, sdp->sd_max_dirres) +
David Teiglandb3b94fa2006-01-16 16:50:04 +00001396 4 * RES_DINODE + 4 * RES_LEAF +
S. Wendy Cheng87d21e02007-01-18 16:07:03 -05001397 RES_STATFS + RES_QUOTA + 4, 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001398 if (error)
1399 goto out_ipreserv;
1400 } else {
1401 error = gfs2_trans_begin(sdp, 4 * RES_DINODE +
S. Wendy Cheng87d21e02007-01-18 16:07:03 -05001402 5 * RES_LEAF + 4, 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001403 if (error)
1404 goto out_gunlock;
1405 }
1406
1407 /* Remove the target file, if it exists */
1408
Bob Peterson4327a9b2012-11-12 13:03:29 -05001409 if (nip)
1410 error = gfs2_unlink_inode(ndip, ndentry);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001411
1412 if (dir_rename) {
Steven Whitehouse8d123582010-09-17 12:30:23 +01001413 error = gfs2_dir_mvino(ip, &gfs2_qdotdot, ndip, DT_DIR);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001414 if (error)
1415 goto out_end_trans;
1416 } else {
1417 struct buffer_head *dibh;
1418 error = gfs2_meta_inode_buffer(ip, &dibh);
1419 if (error)
1420 goto out_end_trans;
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +01001421 ip->i_inode.i_ctime = CURRENT_TIME;
Steven Whitehouse350a9b02012-12-14 12:36:02 +00001422 gfs2_trans_add_meta(ip->i_gl, dibh);
Steven Whitehouse539e5d62006-10-31 15:07:05 -05001423 gfs2_dinode_out(ip, dibh->b_data);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001424 brelse(dibh);
1425 }
1426
Steven Whitehouse855d23c2011-05-09 16:42:37 +01001427 error = gfs2_dir_del(odip, odentry);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001428 if (error)
1429 goto out_end_trans;
1430
Steven Whitehouse3d6ecb72011-05-09 13:30:08 +01001431 error = gfs2_dir_add(ndir, &ndentry->d_name, ip);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001432 if (error)
1433 goto out_end_trans;
1434
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001435out_end_trans:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001436 gfs2_trans_end(sdp);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001437out_ipreserv:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001438 if (alloc_required)
1439 gfs2_inplace_release(ndip);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001440out_gunlock_q:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001441 if (alloc_required)
1442 gfs2_quota_unlock(ndip);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001443out_gunlock:
Bob Peterson72dbf472008-08-12 13:39:29 -05001444 while (x--) {
1445 gfs2_glock_dq(ghs + x);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001446 gfs2_holder_uninit(ghs + x);
Bob Peterson72dbf472008-08-12 13:39:29 -05001447 }
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001448out_gunlock_r:
Steven Whitehouse0188d6c2008-08-26 09:38:26 +01001449 if (r_gh.gh_gl)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001450 gfs2_glock_dq_uninit(&r_gh);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001451out:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001452 return error;
1453}
1454
1455/**
David Teiglandb3b94fa2006-01-16 16:50:04 +00001456 * gfs2_follow_link - Follow a symbolic link
1457 * @dentry: The dentry of the link
1458 * @nd: Data that we pass to vfs_follow_link()
1459 *
Al Viroc177c2a2010-01-14 00:59:16 -05001460 * This can handle symlinks of any size.
David Teiglandb3b94fa2006-01-16 16:50:04 +00001461 *
1462 * Returns: 0 on success or error code
1463 */
1464
1465static void *gfs2_follow_link(struct dentry *dentry, struct nameidata *nd)
1466{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001467 struct gfs2_inode *ip = GFS2_I(dentry->d_inode);
Al Viroc177c2a2010-01-14 00:59:16 -05001468 struct gfs2_holder i_gh;
1469 struct buffer_head *dibh;
Steven Whitehouse160b4022011-05-13 10:34:59 +01001470 unsigned int size;
Al Viroc177c2a2010-01-14 00:59:16 -05001471 char *buf;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001472 int error;
1473
Al Viroc177c2a2010-01-14 00:59:16 -05001474 gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh);
1475 error = gfs2_glock_nq(&i_gh);
1476 if (error) {
1477 gfs2_holder_uninit(&i_gh);
1478 nd_set_link(nd, ERR_PTR(error));
1479 return NULL;
1480 }
David Teiglandb3b94fa2006-01-16 16:50:04 +00001481
Steven Whitehousea2e0f792010-08-11 09:53:11 +01001482 size = (unsigned int)i_size_read(&ip->i_inode);
1483 if (size == 0) {
Al Viroc177c2a2010-01-14 00:59:16 -05001484 gfs2_consist_inode(ip);
1485 buf = ERR_PTR(-EIO);
1486 goto out;
1487 }
1488
1489 error = gfs2_meta_inode_buffer(ip, &dibh);
1490 if (error) {
1491 buf = ERR_PTR(error);
1492 goto out;
1493 }
1494
Steven Whitehouse160b4022011-05-13 10:34:59 +01001495 buf = kzalloc(size + 1, GFP_NOFS);
Al Viroc177c2a2010-01-14 00:59:16 -05001496 if (!buf)
1497 buf = ERR_PTR(-ENOMEM);
1498 else
Steven Whitehouse160b4022011-05-13 10:34:59 +01001499 memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), size);
Al Viroc177c2a2010-01-14 00:59:16 -05001500 brelse(dibh);
1501out:
1502 gfs2_glock_dq_uninit(&i_gh);
1503 nd_set_link(nd, buf);
1504 return NULL;
1505}
1506
1507static void gfs2_put_link(struct dentry *dentry, struct nameidata *nd, void *p)
1508{
1509 char *s = nd_get_link(nd);
1510 if (!IS_ERR(s))
1511 kfree(s);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001512}
1513
1514/**
1515 * gfs2_permission -
Steven Whitehouse75d5cfb2011-01-19 09:42:40 +00001516 * @inode: The inode
1517 * @mask: The mask to be tested
1518 * @flags: Indicates whether this is an RCU path walk or not
David Teiglandb3b94fa2006-01-16 16:50:04 +00001519 *
Steven Whitehouse300c7d72006-11-27 09:55:28 -05001520 * This may be called from the VFS directly, or from within GFS2 with the
1521 * inode locked, so we look to see if the glock is already locked and only
1522 * lock the glock if its not already been done.
1523 *
David Teiglandb3b94fa2006-01-16 16:50:04 +00001524 * Returns: errno
1525 */
1526
Al Viro10556cb2011-06-20 19:28:19 -04001527int gfs2_permission(struct inode *inode, int mask)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001528{
Nick Pigginb74c79e2011-01-07 17:49:58 +11001529 struct gfs2_inode *ip;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001530 struct gfs2_holder i_gh;
1531 int error;
Steven Whitehouse300c7d72006-11-27 09:55:28 -05001532 int unlock = 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001533
Nick Pigginb74c79e2011-01-07 17:49:58 +11001534
1535 ip = GFS2_I(inode);
Steven Whitehouse7afd88d2008-02-22 16:07:18 +00001536 if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) {
Al Viro10556cb2011-06-20 19:28:19 -04001537 if (mask & MAY_NOT_BLOCK)
Steven Whitehouse75d5cfb2011-01-19 09:42:40 +00001538 return -ECHILD;
Steven Whitehouse300c7d72006-11-27 09:55:28 -05001539 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
1540 if (error)
1541 return error;
1542 unlock = 1;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001543 }
1544
Miklos Szeredif58ba882008-07-02 21:12:01 +02001545 if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode))
1546 error = -EACCES;
1547 else
Al Viro2830ba72011-06-20 19:16:29 -04001548 error = generic_permission(inode, mask);
Steven Whitehouse300c7d72006-11-27 09:55:28 -05001549 if (unlock)
1550 gfs2_glock_dq_uninit(&i_gh);
1551
David Teiglandb3b94fa2006-01-16 16:50:04 +00001552 return error;
1553}
1554
Steven Whitehouseab9bbda2011-08-15 14:20:36 +01001555static int __gfs2_setattr_simple(struct inode *inode, struct iattr *attr)
Steven Whitehouse194c0112011-05-09 14:06:38 +01001556{
Steven Whitehouse194c0112011-05-09 14:06:38 +01001557 setattr_copy(inode, attr);
1558 mark_inode_dirty(inode);
Steven Whitehouse194c0112011-05-09 14:06:38 +01001559 return 0;
1560}
1561
1562/**
1563 * gfs2_setattr_simple -
1564 * @ip:
1565 * @attr:
1566 *
1567 * Returns: errno
1568 */
1569
Steven Whitehouseab9bbda2011-08-15 14:20:36 +01001570int gfs2_setattr_simple(struct inode *inode, struct iattr *attr)
Steven Whitehouse194c0112011-05-09 14:06:38 +01001571{
1572 int error;
1573
1574 if (current->journal_info)
Steven Whitehouseab9bbda2011-08-15 14:20:36 +01001575 return __gfs2_setattr_simple(inode, attr);
Steven Whitehouse194c0112011-05-09 14:06:38 +01001576
Steven Whitehouseab9bbda2011-08-15 14:20:36 +01001577 error = gfs2_trans_begin(GFS2_SB(inode), RES_DINODE, 0);
Steven Whitehouse194c0112011-05-09 14:06:38 +01001578 if (error)
1579 return error;
1580
Steven Whitehouseab9bbda2011-08-15 14:20:36 +01001581 error = __gfs2_setattr_simple(inode, attr);
1582 gfs2_trans_end(GFS2_SB(inode));
Steven Whitehouse194c0112011-05-09 14:06:38 +01001583 return error;
1584}
1585
David Teiglandb3b94fa2006-01-16 16:50:04 +00001586static int setattr_chown(struct inode *inode, struct iattr *attr)
1587{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001588 struct gfs2_inode *ip = GFS2_I(inode);
1589 struct gfs2_sbd *sdp = GFS2_SB(inode);
Eric W. Biederman7c06b5d2013-01-31 20:27:54 -08001590 kuid_t ouid, nuid;
1591 kgid_t ogid, ngid;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001592 int error;
1593
Steven Whitehouse2933f922006-11-01 13:23:29 -05001594 ouid = inode->i_uid;
1595 ogid = inode->i_gid;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001596 nuid = attr->ia_uid;
1597 ngid = attr->ia_gid;
1598
Eric W. Biederman6b24c0d2013-01-31 21:56:13 -08001599 if (!(attr->ia_valid & ATTR_UID) || uid_eq(ouid, nuid))
Eric W. Biedermanf4108a62013-01-31 17:49:26 -08001600 ouid = nuid = NO_UID_QUOTA_CHANGE;
Eric W. Biederman6b24c0d2013-01-31 21:56:13 -08001601 if (!(attr->ia_valid & ATTR_GID) || gid_eq(ogid, ngid))
Eric W. Biedermanf4108a62013-01-31 17:49:26 -08001602 ogid = ngid = NO_GID_QUOTA_CHANGE;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001603
David Teiglandb3b94fa2006-01-16 16:50:04 +00001604 error = gfs2_quota_lock(ip, nuid, ngid);
1605 if (error)
Bob Peterson5407e242012-05-18 09:28:23 -04001606 return error;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001607
Eric W. Biederman6b24c0d2013-01-31 21:56:13 -08001608 if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) ||
1609 !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) {
David Teiglandb3b94fa2006-01-16 16:50:04 +00001610 error = gfs2_quota_check(ip, nuid, ngid);
1611 if (error)
1612 goto out_gunlock_q;
1613 }
1614
1615 error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0);
1616 if (error)
1617 goto out_gunlock_q;
1618
Steven Whitehouseab9bbda2011-08-15 14:20:36 +01001619 error = gfs2_setattr_simple(inode, attr);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001620 if (error)
1621 goto out_end_trans;
1622
Eric W. Biederman6b24c0d2013-01-31 21:56:13 -08001623 if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) ||
1624 !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) {
Steven Whitehouse77658aa2008-02-12 14:17:27 +00001625 u64 blocks = gfs2_get_inode_blocks(&ip->i_inode);
1626 gfs2_quota_change(ip, -blocks, ouid, ogid);
1627 gfs2_quota_change(ip, blocks, nuid, ngid);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001628 }
1629
Steven Whitehousea91ea692006-09-04 12:04:26 -04001630out_end_trans:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001631 gfs2_trans_end(sdp);
Steven Whitehousea91ea692006-09-04 12:04:26 -04001632out_gunlock_q:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001633 gfs2_quota_unlock(ip);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001634 return error;
1635}
1636
1637/**
1638 * gfs2_setattr - Change attributes on an inode
1639 * @dentry: The dentry which is changing
1640 * @attr: The structure describing the change
1641 *
1642 * The VFS layer wants to change one or more of an inodes attributes. Write
1643 * that change out to disk.
1644 *
1645 * Returns: errno
1646 */
1647
1648static int gfs2_setattr(struct dentry *dentry, struct iattr *attr)
1649{
1650 struct inode *inode = dentry->d_inode;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001651 struct gfs2_inode *ip = GFS2_I(inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001652 struct gfs2_holder i_gh;
1653 int error;
1654
Bob Peterson0a305e42012-06-06 11:17:59 +01001655 error = gfs2_rs_alloc(ip);
1656 if (error)
1657 return error;
1658
David Teiglandb3b94fa2006-01-16 16:50:04 +00001659 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1660 if (error)
1661 return error;
1662
1663 error = -EPERM;
1664 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
1665 goto out;
1666
1667 error = inode_change_ok(inode, attr);
1668 if (error)
1669 goto out;
1670
1671 if (attr->ia_valid & ATTR_SIZE)
Steven Whitehouseff8f33c2010-08-11 09:37:53 +01001672 error = gfs2_setattr_size(inode, attr->ia_size);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001673 else if (attr->ia_valid & (ATTR_UID | ATTR_GID))
1674 error = setattr_chown(inode, attr);
1675 else if ((attr->ia_valid & ATTR_MODE) && IS_POSIXACL(inode))
1676 error = gfs2_acl_chmod(ip, attr);
1677 else
Steven Whitehouseab9bbda2011-08-15 14:20:36 +01001678 error = gfs2_setattr_simple(inode, attr);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001679
Steven Whitehousea91ea692006-09-04 12:04:26 -04001680out:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001681 if (!error)
1682 mark_inode_dirty(inode);
Steven Whitehouseab9bbda2011-08-15 14:20:36 +01001683 gfs2_glock_dq_uninit(&i_gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001684 return error;
1685}
1686
1687/**
1688 * gfs2_getattr - Read out an inode's attributes
Steven Whitehouse26c1a572006-09-04 15:32:10 -04001689 * @mnt: The vfsmount the inode is being accessed from
David Teiglandb3b94fa2006-01-16 16:50:04 +00001690 * @dentry: The dentry to stat
1691 * @stat: The inode's stats
1692 *
Steven Whitehousedcf3dd82006-11-27 10:12:05 -05001693 * This may be called from the VFS directly, or from within GFS2 with the
1694 * inode locked, so we look to see if the glock is already locked and only
1695 * lock the glock if its not already been done. Note that its the NFS
1696 * readdirplus operation which causes this to be called (from filldir)
1697 * with the glock already held.
1698 *
David Teiglandb3b94fa2006-01-16 16:50:04 +00001699 * Returns: errno
1700 */
1701
1702static int gfs2_getattr(struct vfsmount *mnt, struct dentry *dentry,
1703 struct kstat *stat)
1704{
1705 struct inode *inode = dentry->d_inode;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001706 struct gfs2_inode *ip = GFS2_I(inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001707 struct gfs2_holder gh;
1708 int error;
Steven Whitehousedcf3dd82006-11-27 10:12:05 -05001709 int unlock = 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001710
Steven Whitehouse7afd88d2008-02-22 16:07:18 +00001711 if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) {
Steven Whitehousedcf3dd82006-11-27 10:12:05 -05001712 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
1713 if (error)
1714 return error;
1715 unlock = 1;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001716 }
1717
Steven Whitehousedcf3dd82006-11-27 10:12:05 -05001718 generic_fillattr(inode, stat);
Steven Whitehoused7c103d2007-01-25 17:14:59 +00001719 if (unlock)
Steven Whitehousedcf3dd82006-11-27 10:12:05 -05001720 gfs2_glock_dq_uninit(&gh);
1721
1722 return 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001723}
1724
1725static int gfs2_setxattr(struct dentry *dentry, const char *name,
1726 const void *data, size_t size, int flags)
1727{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001728 struct inode *inode = dentry->d_inode;
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001729 struct gfs2_inode *ip = GFS2_I(inode);
1730 struct gfs2_holder gh;
1731 int ret;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001732
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001733 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
1734 ret = gfs2_glock_nq(&gh);
1735 if (ret == 0) {
Steven Whitehouse645b2cc2012-07-26 14:15:17 +01001736 ret = gfs2_rs_alloc(ip);
1737 if (ret == 0)
1738 ret = generic_setxattr(dentry, name, data, size, flags);
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001739 gfs2_glock_dq(&gh);
1740 }
1741 gfs2_holder_uninit(&gh);
1742 return ret;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001743}
1744
1745static ssize_t gfs2_getxattr(struct dentry *dentry, const char *name,
1746 void *data, size_t size)
1747{
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001748 struct inode *inode = dentry->d_inode;
1749 struct gfs2_inode *ip = GFS2_I(inode);
1750 struct gfs2_holder gh;
1751 int ret;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001752
Steven Whitehouse7bd9ee52013-08-16 21:10:28 +01001753 /* For selinux during lookup */
1754 if (gfs2_glock_is_locked_by_me(ip->i_gl))
1755 return generic_getxattr(dentry, name, data, size);
1756
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001757 gfs2_holder_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
1758 ret = gfs2_glock_nq(&gh);
1759 if (ret == 0) {
1760 ret = generic_getxattr(dentry, name, data, size);
1761 gfs2_glock_dq(&gh);
1762 }
1763 gfs2_holder_uninit(&gh);
1764 return ret;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001765}
1766
1767static int gfs2_removexattr(struct dentry *dentry, const char *name)
1768{
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001769 struct inode *inode = dentry->d_inode;
1770 struct gfs2_inode *ip = GFS2_I(inode);
1771 struct gfs2_holder gh;
1772 int ret;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001773
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001774 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
1775 ret = gfs2_glock_nq(&gh);
1776 if (ret == 0) {
Steven Whitehouse645b2cc2012-07-26 14:15:17 +01001777 ret = gfs2_rs_alloc(ip);
1778 if (ret == 0)
1779 ret = generic_removexattr(dentry, name);
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001780 gfs2_glock_dq(&gh);
1781 }
1782 gfs2_holder_uninit(&gh);
1783 return ret;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001784}
1785
Steven Whitehousee9079cc2008-10-14 14:43:29 +01001786static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
1787 u64 start, u64 len)
1788{
1789 struct gfs2_inode *ip = GFS2_I(inode);
1790 struct gfs2_holder gh;
1791 int ret;
1792
1793 ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC);
1794 if (ret)
1795 return ret;
1796
1797 mutex_lock(&inode->i_mutex);
1798
1799 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
1800 if (ret)
1801 goto out;
1802
1803 if (gfs2_is_stuffed(ip)) {
1804 u64 phys = ip->i_no_addr << inode->i_blkbits;
1805 u64 size = i_size_read(inode);
1806 u32 flags = FIEMAP_EXTENT_LAST|FIEMAP_EXTENT_NOT_ALIGNED|
1807 FIEMAP_EXTENT_DATA_INLINE;
1808 phys += sizeof(struct gfs2_dinode);
1809 phys += start;
1810 if (start + len > size)
1811 len = size - start;
1812 if (start < size)
1813 ret = fiemap_fill_next_extent(fieinfo, start, phys,
1814 len, flags);
1815 if (ret == 1)
1816 ret = 0;
1817 } else {
1818 ret = __generic_block_fiemap(inode, fieinfo, start, len,
1819 gfs2_block_map);
1820 }
1821
1822 gfs2_glock_dq_uninit(&gh);
1823out:
1824 mutex_unlock(&inode->i_mutex);
1825 return ret;
1826}
1827
Arjan van de Ven92e1d5b2007-02-12 00:55:39 -08001828const struct inode_operations gfs2_file_iops = {
Al Viroe6305c42008-07-15 21:03:57 -04001829 .permission = gfs2_permission,
David Teiglandb3b94fa2006-01-16 16:50:04 +00001830 .setattr = gfs2_setattr,
1831 .getattr = gfs2_getattr,
1832 .setxattr = gfs2_setxattr,
1833 .getxattr = gfs2_getxattr,
1834 .listxattr = gfs2_listxattr,
1835 .removexattr = gfs2_removexattr,
Steven Whitehousee9079cc2008-10-14 14:43:29 +01001836 .fiemap = gfs2_fiemap,
Christoph Hellwig4e34e712011-07-23 17:37:31 +02001837 .get_acl = gfs2_get_acl,
David Teiglandb3b94fa2006-01-16 16:50:04 +00001838};
1839
Arjan van de Ven92e1d5b2007-02-12 00:55:39 -08001840const struct inode_operations gfs2_dir_iops = {
David Teiglandb3b94fa2006-01-16 16:50:04 +00001841 .create = gfs2_create,
1842 .lookup = gfs2_lookup,
1843 .link = gfs2_link,
1844 .unlink = gfs2_unlink,
1845 .symlink = gfs2_symlink,
1846 .mkdir = gfs2_mkdir,
Steven Whitehouse855d23c2011-05-09 16:42:37 +01001847 .rmdir = gfs2_unlink,
David Teiglandb3b94fa2006-01-16 16:50:04 +00001848 .mknod = gfs2_mknod,
1849 .rename = gfs2_rename,
Al Viroe6305c42008-07-15 21:03:57 -04001850 .permission = gfs2_permission,
David Teiglandb3b94fa2006-01-16 16:50:04 +00001851 .setattr = gfs2_setattr,
1852 .getattr = gfs2_getattr,
1853 .setxattr = gfs2_setxattr,
1854 .getxattr = gfs2_getxattr,
1855 .listxattr = gfs2_listxattr,
1856 .removexattr = gfs2_removexattr,
Steven Whitehousee9079cc2008-10-14 14:43:29 +01001857 .fiemap = gfs2_fiemap,
Christoph Hellwig4e34e712011-07-23 17:37:31 +02001858 .get_acl = gfs2_get_acl,
Steven Whitehouse6d4ade92013-06-14 11:17:15 +01001859 .atomic_open = gfs2_atomic_open,
David Teiglandb3b94fa2006-01-16 16:50:04 +00001860};
1861
Arjan van de Ven92e1d5b2007-02-12 00:55:39 -08001862const struct inode_operations gfs2_symlink_iops = {
Al Viroc177c2a2010-01-14 00:59:16 -05001863 .readlink = generic_readlink,
David Teiglandb3b94fa2006-01-16 16:50:04 +00001864 .follow_link = gfs2_follow_link,
Al Viroc177c2a2010-01-14 00:59:16 -05001865 .put_link = gfs2_put_link,
Al Viroe6305c42008-07-15 21:03:57 -04001866 .permission = gfs2_permission,
David Teiglandb3b94fa2006-01-16 16:50:04 +00001867 .setattr = gfs2_setattr,
1868 .getattr = gfs2_getattr,
1869 .setxattr = gfs2_setxattr,
1870 .getxattr = gfs2_getxattr,
1871 .listxattr = gfs2_listxattr,
1872 .removexattr = gfs2_removexattr,
Steven Whitehousee9079cc2008-10-14 14:43:29 +01001873 .fiemap = gfs2_fiemap,
Christoph Hellwig4e34e712011-07-23 17:37:31 +02001874 .get_acl = gfs2_get_acl,
David Teiglandb3b94fa2006-01-16 16:50:04 +00001875};
1876