blob: 6fe2a59c6a9a5e8ba14e7ff4f4fefd729686bf58 [file] [log] [blame]
David Teiglandb3b94fa2006-01-16 16:50:04 +00001/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
Steven Whitehouse3a8a9a12006-05-18 15:09:15 -04003 * Copyright (C) 2004-2006 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/pagemap.h>
15#include <linux/uio.h>
16#include <linux/blkdev.h>
17#include <linux/mm.h>
Miklos Szeredif58ba882008-07-02 21:12:01 +020018#include <linux/mount.h>
Steven Whitehouse18ec7d52006-02-08 11:50:51 +000019#include <linux/fs.h>
Steven Whitehouse5c676f62006-02-27 17:23:27 -050020#include <linux/gfs2_ondisk.h>
Christoph Hellwig2fe17c12011-01-14 13:07:43 +010021#include <linux/falloc.h>
22#include <linux/swap.h>
Steven Whitehouse71b86f52006-03-28 14:14:04 -050023#include <linux/crc32.h>
Steven Whitehouse33c3de32006-11-30 10:14:32 -050024#include <linux/writeback.h>
Linus Torvalds7c0f6ba2016-12-24 11:46:01 -080025#include <linux/uaccess.h>
Steven Whitehousef057f6c2009-01-12 10:43:39 +000026#include <linux/dlm.h>
27#include <linux/dlm_plock.h>
Bob Peterson2ddfbdd2014-08-20 12:44:45 -040028#include <linux/delay.h>
David Teiglandb3b94fa2006-01-16 16:50:04 +000029
30#include "gfs2.h"
Steven Whitehouse5c676f62006-02-27 17:23:27 -050031#include "incore.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000032#include "bmap.h"
33#include "dir.h"
34#include "glock.h"
35#include "glops.h"
36#include "inode.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000037#include "log.h"
38#include "meta_io.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000039#include "quota.h"
40#include "rgrp.h"
41#include "trans.h"
Steven Whitehouse5c676f62006-02-27 17:23:27 -050042#include "util.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000043
David Teiglandb3b94fa2006-01-16 16:50:04 +000044/**
45 * gfs2_llseek - seek to a location in a file
46 * @file: the file
47 * @offset: the offset
Andrew Morton965c8e52012-12-17 15:59:39 -080048 * @whence: Where to seek from (SEEK_SET, SEEK_CUR, or SEEK_END)
David Teiglandb3b94fa2006-01-16 16:50:04 +000049 *
50 * SEEK_END requires the glock for the file because it references the
51 * file's size.
52 *
53 * Returns: The new offset, or errno
54 */
55
Andrew Morton965c8e52012-12-17 15:59:39 -080056static loff_t gfs2_llseek(struct file *file, loff_t offset, int whence)
David Teiglandb3b94fa2006-01-16 16:50:04 +000057{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -040058 struct gfs2_inode *ip = GFS2_I(file->f_mapping->host);
David Teiglandb3b94fa2006-01-16 16:50:04 +000059 struct gfs2_holder i_gh;
60 loff_t error;
61
Andrew Morton965c8e52012-12-17 15:59:39 -080062 switch (whence) {
Steven Whitehouse94536152011-08-23 10:19:25 +010063 case SEEK_END: /* These reference inode->i_size */
64 case SEEK_DATA:
65 case SEEK_HOLE:
David Teiglandb3b94fa2006-01-16 16:50:04 +000066 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY,
67 &i_gh);
68 if (!error) {
Andrew Morton965c8e52012-12-17 15:59:39 -080069 error = generic_file_llseek(file, offset, whence);
David Teiglandb3b94fa2006-01-16 16:50:04 +000070 gfs2_glock_dq_uninit(&i_gh);
71 }
Steven Whitehouse94536152011-08-23 10:19:25 +010072 break;
73 case SEEK_CUR:
74 case SEEK_SET:
Andrew Morton965c8e52012-12-17 15:59:39 -080075 error = generic_file_llseek(file, offset, whence);
Steven Whitehouse94536152011-08-23 10:19:25 +010076 break;
77 default:
78 error = -EINVAL;
79 }
David Teiglandb3b94fa2006-01-16 16:50:04 +000080
81 return error;
82}
83
David Teiglandb3b94fa2006-01-16 16:50:04 +000084/**
Al Virod81a8ef2013-05-16 14:14:48 -040085 * gfs2_readdir - Iterator for a directory
David Teiglandb3b94fa2006-01-16 16:50:04 +000086 * @file: The directory to read from
Al Virod81a8ef2013-05-16 14:14:48 -040087 * @ctx: What to feed directory entries to
David Teiglandb3b94fa2006-01-16 16:50:04 +000088 *
89 * Returns: errno
90 */
91
Al Virod81a8ef2013-05-16 14:14:48 -040092static int gfs2_readdir(struct file *file, struct dir_context *ctx)
David Teiglandb3b94fa2006-01-16 16:50:04 +000093{
Steven Whitehouse71b86f52006-03-28 14:14:04 -050094 struct inode *dir = file->f_mapping->host;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -040095 struct gfs2_inode *dip = GFS2_I(dir);
David Teiglandb3b94fa2006-01-16 16:50:04 +000096 struct gfs2_holder d_gh;
David Teiglandb3b94fa2006-01-16 16:50:04 +000097 int error;
98
Al Virod81a8ef2013-05-16 14:14:48 -040099 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh);
100 if (error)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000101 return error;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000102
Al Virod81a8ef2013-05-16 14:14:48 -0400103 error = gfs2_dir_read(dir, ctx, &file->f_ra);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000104
105 gfs2_glock_dq_uninit(&d_gh);
106
David Teiglandb3b94fa2006-01-16 16:50:04 +0000107 return error;
108}
109
Steven Whitehouse128e5eb2006-10-02 11:24:43 -0400110/**
111 * fsflags_cvt
112 * @table: A table of 32 u32 flags
113 * @val: a 32 bit value to convert
114 *
115 * This function can be used to convert between fsflags values and
116 * GFS2's own flags values.
117 *
118 * Returns: the converted flags
119 */
120static u32 fsflags_cvt(const u32 *table, u32 val)
121{
122 u32 res = 0;
123 while(val) {
124 if (val & 1)
125 res |= *table;
126 table++;
127 val >>= 1;
128 }
129 return res;
130}
David Teiglandb3b94fa2006-01-16 16:50:04 +0000131
Steven Whitehouse128e5eb2006-10-02 11:24:43 -0400132static const u32 fsflags_to_gfs2[32] = {
133 [3] = GFS2_DIF_SYNC,
134 [4] = GFS2_DIF_IMMUTABLE,
135 [5] = GFS2_DIF_APPENDONLY,
136 [7] = GFS2_DIF_NOATIME,
137 [12] = GFS2_DIF_EXHASH,
Steven Whitehouseb9af7ca2007-07-18 11:40:06 +0100138 [14] = GFS2_DIF_INHERIT_JDATA,
Steven Whitehouse23d0bb82012-05-28 15:26:56 +0100139 [17] = GFS2_DIF_TOPDIR,
Steven Whitehouse71b86f52006-03-28 14:14:04 -0500140};
141
Steven Whitehouse128e5eb2006-10-02 11:24:43 -0400142static const u32 gfs2_to_fsflags[32] = {
143 [gfs2fl_Sync] = FS_SYNC_FL,
144 [gfs2fl_Immutable] = FS_IMMUTABLE_FL,
145 [gfs2fl_AppendOnly] = FS_APPEND_FL,
146 [gfs2fl_NoAtime] = FS_NOATIME_FL,
147 [gfs2fl_ExHash] = FS_INDEX_FL,
Steven Whitehouse23d0bb82012-05-28 15:26:56 +0100148 [gfs2fl_TopLevel] = FS_TOPDIR_FL,
Steven Whitehouse128e5eb2006-10-02 11:24:43 -0400149 [gfs2fl_InheritJdata] = FS_JOURNAL_DATA_FL,
Steven Whitehouse7ea9ea82006-03-31 15:01:28 -0500150};
Steven Whitehouse71b86f52006-03-28 14:14:04 -0500151
Steven Whitehouseb09e5932006-04-07 11:17:32 -0400152static int gfs2_get_flags(struct file *filp, u32 __user *ptr)
Steven Whitehouse71b86f52006-03-28 14:14:04 -0500153{
Al Viro496ad9a2013-01-23 17:07:38 -0500154 struct inode *inode = file_inode(filp);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400155 struct gfs2_inode *ip = GFS2_I(inode);
Steven Whitehouse71b86f52006-03-28 14:14:04 -0500156 struct gfs2_holder gh;
157 int error;
Steven Whitehouse128e5eb2006-10-02 11:24:43 -0400158 u32 fsflags;
Steven Whitehouse71b86f52006-03-28 14:14:04 -0500159
Steven Whitehouse719ee342008-09-18 13:53:59 +0100160 gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
161 error = gfs2_glock_nq(&gh);
Steven Whitehouse71b86f52006-03-28 14:14:04 -0500162 if (error)
Daniel DeFreez9c7fe832016-04-19 19:57:45 -0400163 goto out_uninit;
Steven Whitehouse907b9bc2006-09-25 09:26:04 -0400164
Steven Whitehouse383f01f2008-11-04 10:05:22 +0000165 fsflags = fsflags_cvt(gfs2_to_fsflags, ip->i_diskflags);
166 if (!S_ISDIR(inode->i_mode) && ip->i_diskflags & GFS2_DIF_JDATA)
Steven Whitehousec9f6a6b2008-07-10 16:09:29 +0100167 fsflags |= FS_JOURNAL_DATA_FL;
Steven Whitehouse128e5eb2006-10-02 11:24:43 -0400168 if (put_user(fsflags, ptr))
Steven Whitehouse71b86f52006-03-28 14:14:04 -0500169 error = -EFAULT;
170
Steven Whitehouse3cc3f712007-10-15 15:40:33 +0100171 gfs2_glock_dq(&gh);
Daniel DeFreez9c7fe832016-04-19 19:57:45 -0400172out_uninit:
Steven Whitehouse71b86f52006-03-28 14:14:04 -0500173 gfs2_holder_uninit(&gh);
174 return error;
175}
176
Steven Whitehouse6b124d82006-11-08 12:51:06 -0500177void gfs2_set_inode_flags(struct inode *inode)
178{
179 struct gfs2_inode *ip = GFS2_I(inode);
Steven Whitehouse6b124d82006-11-08 12:51:06 -0500180 unsigned int flags = inode->i_flags;
181
Steven Whitehouse9964afb2011-06-16 14:06:55 +0100182 flags &= ~(S_SYNC|S_APPEND|S_IMMUTABLE|S_NOATIME|S_DIRSYNC|S_NOSEC);
183 if ((ip->i_eattr == 0) && !is_sxid(inode->i_mode))
Benjamin Marzinski01e64ee2015-05-05 12:25:48 -0500184 flags |= S_NOSEC;
Steven Whitehouse383f01f2008-11-04 10:05:22 +0000185 if (ip->i_diskflags & GFS2_DIF_IMMUTABLE)
Steven Whitehouse6b124d82006-11-08 12:51:06 -0500186 flags |= S_IMMUTABLE;
Steven Whitehouse383f01f2008-11-04 10:05:22 +0000187 if (ip->i_diskflags & GFS2_DIF_APPENDONLY)
Steven Whitehouse6b124d82006-11-08 12:51:06 -0500188 flags |= S_APPEND;
Steven Whitehouse383f01f2008-11-04 10:05:22 +0000189 if (ip->i_diskflags & GFS2_DIF_NOATIME)
Steven Whitehouse6b124d82006-11-08 12:51:06 -0500190 flags |= S_NOATIME;
Steven Whitehouse383f01f2008-11-04 10:05:22 +0000191 if (ip->i_diskflags & GFS2_DIF_SYNC)
Steven Whitehouse6b124d82006-11-08 12:51:06 -0500192 flags |= S_SYNC;
193 inode->i_flags = flags;
194}
195
Steven Whitehouse71b86f52006-03-28 14:14:04 -0500196/* Flags that can be set by user space */
197#define GFS2_FLAGS_USER_SET (GFS2_DIF_JDATA| \
Steven Whitehouse71b86f52006-03-28 14:14:04 -0500198 GFS2_DIF_IMMUTABLE| \
199 GFS2_DIF_APPENDONLY| \
200 GFS2_DIF_NOATIME| \
201 GFS2_DIF_SYNC| \
202 GFS2_DIF_SYSTEM| \
Steven Whitehouse23d0bb82012-05-28 15:26:56 +0100203 GFS2_DIF_TOPDIR| \
Steven Whitehouse71b86f52006-03-28 14:14:04 -0500204 GFS2_DIF_INHERIT_JDATA)
205
206/**
Fabian Frederick9dd868e2014-05-15 18:57:08 +0200207 * do_gfs2_set_flags - set flags on an inode
208 * @filp: file pointer
209 * @reqflags: The flags to set
Steven Whitehouse71b86f52006-03-28 14:14:04 -0500210 * @mask: Indicates which flags are valid
211 *
212 */
Steven Whitehouseb09e5932006-04-07 11:17:32 -0400213static int do_gfs2_set_flags(struct file *filp, u32 reqflags, u32 mask)
Steven Whitehouse71b86f52006-03-28 14:14:04 -0500214{
Al Viro496ad9a2013-01-23 17:07:38 -0500215 struct inode *inode = file_inode(filp);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400216 struct gfs2_inode *ip = GFS2_I(inode);
217 struct gfs2_sbd *sdp = GFS2_SB(inode);
Steven Whitehouse71b86f52006-03-28 14:14:04 -0500218 struct buffer_head *bh;
219 struct gfs2_holder gh;
220 int error;
Steven Whitehouse55eccc62006-04-04 14:29:30 -0400221 u32 new_flags, flags;
Steven Whitehouse71b86f52006-03-28 14:14:04 -0500222
Al Viroa561be72011-11-23 11:57:51 -0500223 error = mnt_want_write_file(filp);
Abhijith Das52f341c2006-07-21 02:03:21 -0400224 if (error)
Steven Whitehouse71b86f52006-03-28 14:14:04 -0500225 return error;
226
Miklos Szeredif58ba882008-07-02 21:12:01 +0200227 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
228 if (error)
229 goto out_drop_write;
230
Steven Whitehouse7df0e032010-05-24 14:36:48 +0100231 error = -EACCES;
Serge E. Hallyn2e149672011-03-23 16:43:26 -0700232 if (!inode_owner_or_capable(inode))
Steven Whitehouse7df0e032010-05-24 14:36:48 +0100233 goto out;
234
235 error = 0;
Steven Whitehouse383f01f2008-11-04 10:05:22 +0000236 flags = ip->i_diskflags;
Steven Whitehouse55eccc62006-04-04 14:29:30 -0400237 new_flags = (flags & ~mask) | (reqflags & mask);
Steven Whitehouse71b86f52006-03-28 14:14:04 -0500238 if ((new_flags ^ flags) == 0)
239 goto out;
240
241 error = -EINVAL;
242 if ((new_flags ^ flags) & ~GFS2_FLAGS_USER_SET)
243 goto out;
244
Steven Whitehouse71b86f52006-03-28 14:14:04 -0500245 error = -EPERM;
246 if (IS_IMMUTABLE(inode) && (new_flags & GFS2_DIF_IMMUTABLE))
247 goto out;
248 if (IS_APPEND(inode) && (new_flags & GFS2_DIF_APPENDONLY))
249 goto out;
Steven Whitehouse907b9bc2006-09-25 09:26:04 -0400250 if (((new_flags ^ flags) & GFS2_DIF_IMMUTABLE) &&
Steven Whitehouseb9cb9812006-05-12 17:07:56 -0400251 !capable(CAP_LINUX_IMMUTABLE))
Steven Whitehouse71b86f52006-03-28 14:14:04 -0500252 goto out;
Steven Whitehouseb9cb9812006-05-12 17:07:56 -0400253 if (!IS_IMMUTABLE(inode)) {
Al Viro10556cb2011-06-20 19:28:19 -0400254 error = gfs2_permission(inode, MAY_WRITE);
Steven Whitehouseb9cb9812006-05-12 17:07:56 -0400255 if (error)
256 goto out;
257 }
Steven Whitehouse55610932007-10-17 08:47:38 +0100258 if ((flags ^ new_flags) & GFS2_DIF_JDATA) {
259 if (flags & GFS2_DIF_JDATA)
Benjamin Marzinski24972552014-05-01 22:26:55 -0500260 gfs2_log_flush(sdp, ip->i_gl, NORMAL_FLUSH);
Steven Whitehouse55610932007-10-17 08:47:38 +0100261 error = filemap_fdatawrite(inode->i_mapping);
262 if (error)
263 goto out;
264 error = filemap_fdatawait(inode->i_mapping);
265 if (error)
266 goto out;
267 }
Steven Whitehouse55eccc62006-04-04 14:29:30 -0400268 error = gfs2_trans_begin(sdp, RES_DINODE, 0);
Steven Whitehouse71b86f52006-03-28 14:14:04 -0500269 if (error)
270 goto out;
Steven Whitehouse55eccc62006-04-04 14:29:30 -0400271 error = gfs2_meta_inode_buffer(ip, &bh);
272 if (error)
273 goto out_trans_end;
Steven Whitehouse350a9b02012-12-14 12:36:02 +0000274 gfs2_trans_add_meta(ip->i_gl, bh);
Steven Whitehouse383f01f2008-11-04 10:05:22 +0000275 ip->i_diskflags = new_flags;
Steven Whitehouse539e5d62006-10-31 15:07:05 -0500276 gfs2_dinode_out(ip, bh->b_data);
Steven Whitehouse71b86f52006-03-28 14:14:04 -0500277 brelse(bh);
Steven Whitehouse6b124d82006-11-08 12:51:06 -0500278 gfs2_set_inode_flags(inode);
Steven Whitehouse55610932007-10-17 08:47:38 +0100279 gfs2_set_aops(inode);
Steven Whitehouse55eccc62006-04-04 14:29:30 -0400280out_trans_end:
281 gfs2_trans_end(sdp);
Steven Whitehouse71b86f52006-03-28 14:14:04 -0500282out:
283 gfs2_glock_dq_uninit(&gh);
Miklos Szeredif58ba882008-07-02 21:12:01 +0200284out_drop_write:
Al Viro2a79f172011-12-09 08:06:57 -0500285 mnt_drop_write_file(filp);
Steven Whitehouse71b86f52006-03-28 14:14:04 -0500286 return error;
287}
288
Steven Whitehouseb09e5932006-04-07 11:17:32 -0400289static int gfs2_set_flags(struct file *filp, u32 __user *ptr)
Steven Whitehouse71b86f52006-03-28 14:14:04 -0500290{
Al Viro496ad9a2013-01-23 17:07:38 -0500291 struct inode *inode = file_inode(filp);
Steven Whitehouse128e5eb2006-10-02 11:24:43 -0400292 u32 fsflags, gfsflags;
Steven Whitehouse7df0e032010-05-24 14:36:48 +0100293
Steven Whitehouse128e5eb2006-10-02 11:24:43 -0400294 if (get_user(fsflags, ptr))
Steven Whitehouse71b86f52006-03-28 14:14:04 -0500295 return -EFAULT;
Steven Whitehouse7df0e032010-05-24 14:36:48 +0100296
Steven Whitehouse128e5eb2006-10-02 11:24:43 -0400297 gfsflags = fsflags_cvt(fsflags_to_gfs2, fsflags);
Steven Whitehouseb9af7ca2007-07-18 11:40:06 +0100298 if (!S_ISDIR(inode->i_mode)) {
Steven Whitehouse23d0bb82012-05-28 15:26:56 +0100299 gfsflags &= ~GFS2_DIF_TOPDIR;
Steven Whitehouseb9af7ca2007-07-18 11:40:06 +0100300 if (gfsflags & GFS2_DIF_INHERIT_JDATA)
301 gfsflags ^= (GFS2_DIF_JDATA | GFS2_DIF_INHERIT_JDATA);
Abhi Dasacc546f2015-11-10 15:07:26 -0600302 return do_gfs2_set_flags(filp, gfsflags, ~GFS2_DIF_SYSTEM);
Steven Whitehouseb9af7ca2007-07-18 11:40:06 +0100303 }
Abhi Dasacc546f2015-11-10 15:07:26 -0600304 return do_gfs2_set_flags(filp, gfsflags, ~(GFS2_DIF_SYSTEM | GFS2_DIF_JDATA));
Steven Whitehouse71b86f52006-03-28 14:14:04 -0500305}
306
Steven Whitehouseb09e5932006-04-07 11:17:32 -0400307static long gfs2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
Steven Whitehouse71b86f52006-03-28 14:14:04 -0500308{
309 switch(cmd) {
Steven Whitehouse128e5eb2006-10-02 11:24:43 -0400310 case FS_IOC_GETFLAGS:
Steven Whitehouseb09e5932006-04-07 11:17:32 -0400311 return gfs2_get_flags(filp, (u32 __user *)arg);
Steven Whitehouse128e5eb2006-10-02 11:24:43 -0400312 case FS_IOC_SETFLAGS:
Steven Whitehouseb09e5932006-04-07 11:17:32 -0400313 return gfs2_set_flags(filp, (u32 __user *)arg);
Steven Whitehouse66fc0612012-02-08 12:58:32 +0000314 case FITRIM:
315 return gfs2_fitrim(filp, (void __user *)arg);
Steven Whitehouse71b86f52006-03-28 14:14:04 -0500316 }
317 return -ENOTTY;
318}
319
Steven Whitehouse3cc3f712007-10-15 15:40:33 +0100320/**
Steven Whitehouseda1dfb62012-07-26 11:30:54 +0100321 * gfs2_size_hint - Give a hint to the size of a write request
Fabian Frederick9dd868e2014-05-15 18:57:08 +0200322 * @filep: The struct file
Steven Whitehouseda1dfb62012-07-26 11:30:54 +0100323 * @offset: The file offset of the write
324 * @size: The length of the write
325 *
326 * When we are about to do a write, this function records the total
327 * write size in order to provide a suitable hint to the lower layers
328 * about how many blocks will be required.
329 *
330 */
331
332static void gfs2_size_hint(struct file *filep, loff_t offset, size_t size)
333{
Al Viro496ad9a2013-01-23 17:07:38 -0500334 struct inode *inode = file_inode(filep);
Steven Whitehouseda1dfb62012-07-26 11:30:54 +0100335 struct gfs2_sbd *sdp = GFS2_SB(inode);
336 struct gfs2_inode *ip = GFS2_I(inode);
337 size_t blks = (size + sdp->sd_sb.sb_bsize - 1) >> sdp->sd_sb.sb_bsize_shift;
338 int hint = min_t(size_t, INT_MAX, blks);
339
Bob Petersona097dc7e2015-07-16 08:28:04 -0500340 if (hint > atomic_read(&ip->i_res.rs_sizehint))
341 atomic_set(&ip->i_res.rs_sizehint, hint);
Steven Whitehouseda1dfb62012-07-26 11:30:54 +0100342}
343
344/**
Steven Whitehouse3cc3f712007-10-15 15:40:33 +0100345 * gfs2_allocate_page_backing - Use bmap to allocate blocks
346 * @page: The (locked) page to allocate backing for
347 *
348 * We try to allocate all the blocks required for the page in
349 * one go. This might fail for various reasons, so we keep
350 * trying until all the blocks to back this page are allocated.
351 * If some of the blocks are already allocated, thats ok too.
352 */
353
354static int gfs2_allocate_page_backing(struct page *page)
355{
356 struct inode *inode = page->mapping->host;
357 struct buffer_head bh;
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +0300358 unsigned long size = PAGE_SIZE;
359 u64 lblock = page->index << (PAGE_SHIFT - inode->i_blkbits);
Steven Whitehouse3cc3f712007-10-15 15:40:33 +0100360
361 do {
362 bh.b_state = 0;
363 bh.b_size = size;
Bob Petersone9e1ef22007-12-10 14:13:27 -0600364 gfs2_block_map(inode, lblock, &bh, 1);
Steven Whitehouse3cc3f712007-10-15 15:40:33 +0100365 if (!buffer_mapped(&bh))
366 return -EIO;
367 size -= bh.b_size;
368 lblock += (bh.b_size >> inode->i_blkbits);
369 } while(size > 0);
370 return 0;
371}
372
373/**
374 * gfs2_page_mkwrite - Make a shared, mmap()ed, page writable
375 * @vma: The virtual memory area
Fabian Frederick9dd868e2014-05-15 18:57:08 +0200376 * @vmf: The virtual memory fault containing the page to become writable
Steven Whitehouse3cc3f712007-10-15 15:40:33 +0100377 *
378 * When the page becomes writable, we need to ensure that we have
379 * blocks allocated on disk to back that page.
380 */
381
Dave Jiang11bac802017-02-24 14:56:41 -0800382static int gfs2_page_mkwrite(struct vm_fault *vmf)
Steven Whitehouse3cc3f712007-10-15 15:40:33 +0100383{
Nick Pigginc2ec1752009-03-31 15:23:21 -0700384 struct page *page = vmf->page;
Dave Jiang11bac802017-02-24 14:56:41 -0800385 struct inode *inode = file_inode(vmf->vma->vm_file);
Steven Whitehouse3cc3f712007-10-15 15:40:33 +0100386 struct gfs2_inode *ip = GFS2_I(inode);
387 struct gfs2_sbd *sdp = GFS2_SB(inode);
Steven Whitehouse7b9cff42013-10-02 11:13:25 +0100388 struct gfs2_alloc_parms ap = { .aflags = 0, };
Steven Whitehouse3cc3f712007-10-15 15:40:33 +0100389 unsigned long last_index;
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +0300390 u64 pos = page->index << PAGE_SHIFT;
Steven Whitehouse3cc3f712007-10-15 15:40:33 +0100391 unsigned int data_blocks, ind_blocks, rblocks;
Steven Whitehouse3cc3f712007-10-15 15:40:33 +0100392 struct gfs2_holder gh;
Steven Whitehouse13d921e2011-09-07 15:12:51 +0100393 loff_t size;
Steven Whitehouse3cc3f712007-10-15 15:40:33 +0100394 int ret;
395
Jan Kara39263d5e2012-06-12 16:20:41 +0200396 sb_start_pagefault(inode->i_sb);
Steven Whitehouse13d921e2011-09-07 15:12:51 +0100397
Bob Petersonb54e9a02015-10-26 10:40:28 -0500398 ret = gfs2_rsqa_alloc(ip);
Bob Peterson0a305e42012-06-06 11:17:59 +0100399 if (ret)
Bob Petersona097dc7e2015-07-16 08:28:04 -0500400 goto out;
Bob Peterson0a305e42012-06-06 11:17:59 +0100401
Dave Jiang11bac802017-02-24 14:56:41 -0800402 gfs2_size_hint(vmf->vma->vm_file, pos, PAGE_SIZE);
Bob Peterson8e2e0042012-07-19 08:12:40 -0400403
Steven Whitehouse719ee342008-09-18 13:53:59 +0100404 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
405 ret = gfs2_glock_nq(&gh);
Steven Whitehouse3cc3f712007-10-15 15:40:33 +0100406 if (ret)
Bob Peterson2b3dcf32013-05-28 10:04:44 -0400407 goto out_uninit;
Steven Whitehouse3cc3f712007-10-15 15:40:33 +0100408
Andreas Gruenbacherd7c436c2016-09-26 13:20:19 -0500409 /* Update file times before taking page lock */
Dave Jiang11bac802017-02-24 14:56:41 -0800410 file_update_time(vmf->vma->vm_file);
Andreas Gruenbacherd7c436c2016-09-26 13:20:19 -0500411
Steven Whitehouse9c538832009-03-19 13:15:44 +0000412 set_bit(GLF_DIRTY, &ip->i_gl->gl_flags);
413 set_bit(GIF_SW_PAGED, &ip->i_flags);
414
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +0300415 if (!gfs2_write_alloc_required(ip, pos, PAGE_SIZE)) {
Steven Whitehouse13d921e2011-09-07 15:12:51 +0100416 lock_page(page);
417 if (!PageUptodate(page) || page->mapping != inode->i_mapping) {
418 ret = -EAGAIN;
419 unlock_page(page);
420 }
Steven Whitehouse3cc3f712007-10-15 15:40:33 +0100421 goto out_unlock;
Steven Whitehouse13d921e2011-09-07 15:12:51 +0100422 }
423
Bob Peterson5407e242012-05-18 09:28:23 -0400424 ret = gfs2_rindex_update(sdp);
425 if (ret)
Steven Whitehouse6dbd8222008-01-10 15:18:55 +0000426 goto out_unlock;
427
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +0300428 gfs2_write_calc_reserv(ip, PAGE_SIZE, &data_blocks, &ind_blocks);
Steven Whitehouse7b9cff42013-10-02 11:13:25 +0100429 ap.target = data_blocks + ind_blocks;
Abhi Dasb8fbf472015-03-18 12:03:41 -0500430 ret = gfs2_quota_lock_check(ip, &ap);
431 if (ret)
432 goto out_unlock;
Steven Whitehouse7b9cff42013-10-02 11:13:25 +0100433 ret = gfs2_inplace_reserve(ip, &ap);
Steven Whitehouse3cc3f712007-10-15 15:40:33 +0100434 if (ret)
435 goto out_quota_unlock;
436
437 rblocks = RES_DINODE + ind_blocks;
438 if (gfs2_is_jdata(ip))
439 rblocks += data_blocks ? data_blocks : 1;
Benjamin Marzinskibf97b672010-09-27 16:00:04 -0500440 if (ind_blocks || data_blocks) {
Steven Whitehouse3cc3f712007-10-15 15:40:33 +0100441 rblocks += RES_STATFS + RES_QUOTA;
Steven Whitehouse71f890f2012-07-30 14:53:19 +0100442 rblocks += gfs2_rg_blocks(ip, data_blocks + ind_blocks);
Benjamin Marzinskibf97b672010-09-27 16:00:04 -0500443 }
Steven Whitehouse3cc3f712007-10-15 15:40:33 +0100444 ret = gfs2_trans_begin(sdp, rblocks, 0);
445 if (ret)
446 goto out_trans_fail;
447
448 lock_page(page);
449 ret = -EINVAL;
Steven Whitehouse13d921e2011-09-07 15:12:51 +0100450 size = i_size_read(inode);
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +0300451 last_index = (size - 1) >> PAGE_SHIFT;
Steven Whitehouse13d921e2011-09-07 15:12:51 +0100452 /* Check page index against inode size */
453 if (size == 0 || (page->index > last_index))
454 goto out_trans_end;
Steven Whitehouse3cc3f712007-10-15 15:40:33 +0100455
Steven Whitehouse13d921e2011-09-07 15:12:51 +0100456 ret = -EAGAIN;
457 /* If truncated, we must retry the operation, we may have raced
458 * with the glock demotion code.
459 */
460 if (!PageUptodate(page) || page->mapping != inode->i_mapping)
461 goto out_trans_end;
462
463 /* Unstuff, if required, and allocate backing blocks for page */
464 ret = 0;
465 if (gfs2_is_stuffed(ip))
466 ret = gfs2_unstuff_dinode(ip, page);
467 if (ret == 0)
468 ret = gfs2_allocate_page_backing(page);
469
470out_trans_end:
471 if (ret)
472 unlock_page(page);
Steven Whitehouse3cc3f712007-10-15 15:40:33 +0100473 gfs2_trans_end(sdp);
474out_trans_fail:
475 gfs2_inplace_release(ip);
476out_quota_unlock:
477 gfs2_quota_unlock(ip);
Steven Whitehouse3cc3f712007-10-15 15:40:33 +0100478out_unlock:
479 gfs2_glock_dq(&gh);
Bob Peterson2b3dcf32013-05-28 10:04:44 -0400480out_uninit:
Steven Whitehouse3cc3f712007-10-15 15:40:33 +0100481 gfs2_holder_uninit(&gh);
Steven Whitehouse13d921e2011-09-07 15:12:51 +0100482 if (ret == 0) {
483 set_page_dirty(page);
Darrick J. Wong1d1d1a72013-02-21 16:42:51 -0800484 wait_for_stable_page(page);
Steven Whitehouse13d921e2011-09-07 15:12:51 +0100485 }
Bob Peterson2b3dcf32013-05-28 10:04:44 -0400486out:
Jan Kara39263d5e2012-06-12 16:20:41 +0200487 sb_end_pagefault(inode->i_sb);
Steven Whitehouse13d921e2011-09-07 15:12:51 +0100488 return block_page_mkwrite_return(ret);
Steven Whitehouse3cc3f712007-10-15 15:40:33 +0100489}
490
Alexey Dobriyanf0f37e22009-09-27 22:29:37 +0400491static const struct vm_operations_struct gfs2_vm_ops = {
Steven Whitehouse3cc3f712007-10-15 15:40:33 +0100492 .fault = filemap_fault,
Kirill A. Shutemovf1820362014-04-07 15:37:19 -0700493 .map_pages = filemap_map_pages,
Steven Whitehouse3cc3f712007-10-15 15:40:33 +0100494 .page_mkwrite = gfs2_page_mkwrite,
495};
496
David Teiglandb3b94fa2006-01-16 16:50:04 +0000497/**
498 * gfs2_mmap -
499 * @file: The file to map
500 * @vma: The VMA which described the mapping
501 *
Steven Whitehouse48bf2b12009-04-29 13:59:35 +0100502 * There is no need to get a lock here unless we should be updating
503 * atime. We ignore any locking errors since the only consequence is
504 * a missed atime update (which will just be deferred until later).
505 *
506 * Returns: 0
David Teiglandb3b94fa2006-01-16 16:50:04 +0000507 */
508
509static int gfs2_mmap(struct file *file, struct vm_area_struct *vma)
510{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400511 struct gfs2_inode *ip = GFS2_I(file->f_mapping->host);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000512
Steven Whitehouseb9c93bb2011-02-02 14:48:10 +0000513 if (!(file->f_flags & O_NOATIME) &&
514 !IS_NOATIME(&ip->i_inode)) {
Steven Whitehouse48bf2b12009-04-29 13:59:35 +0100515 struct gfs2_holder i_gh;
516 int error;
517
Benjamin Marzinski3d162682012-11-06 00:49:28 -0600518 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY,
519 &i_gh);
Steven Whitehouseb9c93bb2011-02-02 14:48:10 +0000520 if (error)
521 return error;
Benjamin Marzinski3d162682012-11-06 00:49:28 -0600522 /* grab lock to update inode */
523 gfs2_glock_dq_uninit(&i_gh);
524 file_accessed(file);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000525 }
Steven Whitehouse3cc3f712007-10-15 15:40:33 +0100526 vma->vm_ops = &gfs2_vm_ops;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000527
Steven Whitehouse48bf2b12009-04-29 13:59:35 +0100528 return 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000529}
530
531/**
Steven Whitehouse6d4ade92013-06-14 11:17:15 +0100532 * gfs2_open_common - This is common to open and atomic_open
533 * @inode: The inode being opened
534 * @file: The file being opened
535 *
536 * This maybe called under a glock or not depending upon how it has
537 * been called. We must always be called under a glock for regular
538 * files, however. For other file types, it does not matter whether
539 * we hold the glock or not.
540 *
541 * Returns: Error code or 0 for success
542 */
543
544int gfs2_open_common(struct inode *inode, struct file *file)
545{
546 struct gfs2_file *fp;
547 int ret;
548
549 if (S_ISREG(inode->i_mode)) {
550 ret = generic_file_open(inode, file);
551 if (ret)
552 return ret;
553 }
554
555 fp = kzalloc(sizeof(struct gfs2_file), GFP_NOFS);
556 if (!fp)
557 return -ENOMEM;
558
559 mutex_init(&fp->f_fl_mutex);
560
561 gfs2_assert_warn(GFS2_SB(inode), !file->private_data);
562 file->private_data = fp;
563 return 0;
564}
565
566/**
David Teiglandb3b94fa2006-01-16 16:50:04 +0000567 * gfs2_open - open a file
568 * @inode: the inode to open
569 * @file: the struct file for this opening
570 *
Steven Whitehouse6d4ade92013-06-14 11:17:15 +0100571 * After atomic_open, this function is only used for opening files
572 * which are already cached. We must still get the glock for regular
573 * files to ensure that we have the file size uptodate for the large
574 * file check which is in the common code. That is only an issue for
575 * regular files though.
576 *
David Teiglandb3b94fa2006-01-16 16:50:04 +0000577 * Returns: errno
578 */
579
580static int gfs2_open(struct inode *inode, struct file *file)
581{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400582 struct gfs2_inode *ip = GFS2_I(inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000583 struct gfs2_holder i_gh;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000584 int error;
Steven Whitehouse6d4ade92013-06-14 11:17:15 +0100585 bool need_unlock = false;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000586
Steven Whitehouseb60623c2006-11-01 12:22:46 -0500587 if (S_ISREG(ip->i_inode.i_mode)) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000588 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY,
589 &i_gh);
590 if (error)
Steven Whitehouse6d4ade92013-06-14 11:17:15 +0100591 return error;
592 need_unlock = true;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000593 }
594
Steven Whitehouse6d4ade92013-06-14 11:17:15 +0100595 error = gfs2_open_common(inode, file);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000596
Steven Whitehouse6d4ade92013-06-14 11:17:15 +0100597 if (need_unlock)
598 gfs2_glock_dq_uninit(&i_gh);
599
David Teiglandb3b94fa2006-01-16 16:50:04 +0000600 return error;
601}
602
603/**
Bob Petersondf3fd112012-04-11 12:56:41 -0400604 * gfs2_release - called to close a struct file
David Teiglandb3b94fa2006-01-16 16:50:04 +0000605 * @inode: the inode the struct file belongs to
606 * @file: the struct file being closed
607 *
608 * Returns: errno
609 */
610
Bob Petersondf3fd112012-04-11 12:56:41 -0400611static int gfs2_release(struct inode *inode, struct file *file)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000612{
Bob Peterson0a305e42012-06-06 11:17:59 +0100613 struct gfs2_inode *ip = GFS2_I(inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000614
Bob Peterson8e2e0042012-07-19 08:12:40 -0400615 kfree(file->private_data);
Steven Whitehouse5c676f62006-02-27 17:23:27 -0500616 file->private_data = NULL;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000617
Bob Peterson2b3dcf32013-05-28 10:04:44 -0400618 if (!(file->f_mode & FMODE_WRITE))
619 return 0;
Bob Peterson0a305e42012-06-06 11:17:59 +0100620
Bob Petersonb54e9a02015-10-26 10:40:28 -0500621 gfs2_rsqa_delete(ip, &inode->i_writecount);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000622 return 0;
623}
624
625/**
626 * gfs2_fsync - sync the dirty data for a file (across the cluster)
Josef Bacik02c24a82011-07-16 20:44:56 -0400627 * @file: the file that points to the dentry
628 * @start: the start position in the file to sync
629 * @end: the end position in the file to sync
Steven Whitehousedba898b2011-04-14 09:54:02 +0100630 * @datasync: set if we can ignore timestamp changes
David Teiglandb3b94fa2006-01-16 16:50:04 +0000631 *
Steven Whitehouse2f0264d2011-07-27 10:58:48 +0100632 * We split the data flushing here so that we don't wait for the data
633 * until after we've also sent the metadata to disk. Note that for
634 * data=ordered, we will write & wait for the data at the log flush
635 * stage anyway, so this is unlikely to make much of a difference
636 * except in the data=writeback case.
637 *
638 * If the fdatawrite fails due to any reason except -EIO, we will
639 * continue the remainder of the fsync, although we'll still report
640 * the error at the end. This is to match filemap_write_and_wait_range()
641 * behaviour.
Steven Whitehouse34126f92006-12-07 09:13:14 -0500642 *
David Teiglandb3b94fa2006-01-16 16:50:04 +0000643 * Returns: errno
644 */
645
Josef Bacik02c24a82011-07-16 20:44:56 -0400646static int gfs2_fsync(struct file *file, loff_t start, loff_t end,
647 int datasync)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000648{
Steven Whitehouse2f0264d2011-07-27 10:58:48 +0100649 struct address_space *mapping = file->f_mapping;
650 struct inode *inode = mapping->host;
Theodore Ts'o0ae45f62015-02-02 00:37:00 -0500651 int sync_state = inode->i_state & I_DIRTY_ALL;
Steven Whitehousedba898b2011-04-14 09:54:02 +0100652 struct gfs2_inode *ip = GFS2_I(inode);
Steven Whitehouse87654892011-11-08 14:04:20 +0000653 int ret = 0, ret1 = 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000654
Steven Whitehouse2f0264d2011-07-27 10:58:48 +0100655 if (mapping->nrpages) {
656 ret1 = filemap_fdatawrite_range(mapping, start, end);
657 if (ret1 == -EIO)
658 return ret1;
659 }
Josef Bacik02c24a82011-07-16 20:44:56 -0400660
Benjamin Marzinski0c901802013-09-03 16:59:42 -0500661 if (!gfs2_is_jdata(ip))
662 sync_state &= ~I_DIRTY_PAGES;
Steven Whitehousedba898b2011-04-14 09:54:02 +0100663 if (datasync)
Theodore Ts'o0ae45f62015-02-02 00:37:00 -0500664 sync_state &= ~(I_DIRTY_SYNC | I_DIRTY_TIME);
Steven Whitehousedba898b2011-04-14 09:54:02 +0100665
666 if (sync_state) {
667 ret = sync_inode_metadata(inode, 1);
Steven Whitehouseb5b24d72011-09-07 10:33:25 +0100668 if (ret)
Steven Whitehousedba898b2011-04-14 09:54:02 +0100669 return ret;
Steven Whitehousef1818522011-08-05 10:12:47 +0100670 if (gfs2_is_jdata(ip))
671 filemap_write_and_wait(mapping);
Steven Whitehouseb5b24d72011-09-07 10:33:25 +0100672 gfs2_ail_flush(ip->i_gl, 1);
Steven Whitehouse33c3de32006-11-30 10:14:32 -0500673 }
David Teiglandb3b94fa2006-01-16 16:50:04 +0000674
Steven Whitehouse2f0264d2011-07-27 10:58:48 +0100675 if (mapping->nrpages)
676 ret = filemap_fdatawait_range(mapping, start, end);
677
678 return ret ? ret : ret1;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000679}
680
Steven Whitehouse56aa6162009-12-08 10:25:33 +0000681/**
Al Viroda56e452014-04-03 14:11:01 -0400682 * gfs2_file_write_iter - Perform a write to a file
Steven Whitehouse56aa6162009-12-08 10:25:33 +0000683 * @iocb: The io context
684 * @iov: The data to write
685 * @nr_segs: Number of @iov segments
686 * @pos: The file position
687 *
688 * We have to do a lock/unlock here to refresh the inode size for
689 * O_APPEND writes, otherwise we can land up writing at the wrong
690 * offset. There is still a race, but provided the app is using its
691 * own file locking, this will make O_APPEND work as expected.
692 *
693 */
694
Al Viroda56e452014-04-03 14:11:01 -0400695static ssize_t gfs2_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
Steven Whitehouse56aa6162009-12-08 10:25:33 +0000696{
697 struct file *file = iocb->ki_filp;
Al Viro496ad9a2013-01-23 17:07:38 -0500698 struct gfs2_inode *ip = GFS2_I(file_inode(file));
Bob Peterson0a305e42012-06-06 11:17:59 +0100699 int ret;
700
Bob Petersonb54e9a02015-10-26 10:40:28 -0500701 ret = gfs2_rsqa_alloc(ip);
Bob Peterson0a305e42012-06-06 11:17:59 +0100702 if (ret)
703 return ret;
Steven Whitehouse56aa6162009-12-08 10:25:33 +0000704
Al Viroda56e452014-04-03 14:11:01 -0400705 gfs2_size_hint(file, iocb->ki_pos, iov_iter_count(from));
Steven Whitehouseda1dfb62012-07-26 11:30:54 +0100706
Al Viro2ba48ce2015-04-09 13:52:01 -0400707 if (iocb->ki_flags & IOCB_APPEND) {
Steven Whitehouse56aa6162009-12-08 10:25:33 +0000708 struct gfs2_holder gh;
Steven Whitehouse56aa6162009-12-08 10:25:33 +0000709
710 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
711 if (ret)
712 return ret;
713 gfs2_glock_dq_uninit(&gh);
714 }
715
Al Viroda56e452014-04-03 14:11:01 -0400716 return generic_file_write_iter(iocb, from);
Steven Whitehouse56aa6162009-12-08 10:25:33 +0000717}
718
Christoph Hellwig2fe17c12011-01-14 13:07:43 +0100719static int fallocate_chunk(struct inode *inode, loff_t offset, loff_t len,
720 int mode)
721{
722 struct gfs2_inode *ip = GFS2_I(inode);
723 struct buffer_head *dibh;
724 int error;
Benjamin Marzinski64dd1532011-09-12 18:15:24 -0500725 unsigned int nr_blks;
726 sector_t lblock = offset >> inode->i_blkbits;
Christoph Hellwig2fe17c12011-01-14 13:07:43 +0100727
728 error = gfs2_meta_inode_buffer(ip, &dibh);
729 if (unlikely(error))
Benjamin Marzinski64dd1532011-09-12 18:15:24 -0500730 return error;
Christoph Hellwig2fe17c12011-01-14 13:07:43 +0100731
Steven Whitehouse350a9b02012-12-14 12:36:02 +0000732 gfs2_trans_add_meta(ip->i_gl, dibh);
Christoph Hellwig2fe17c12011-01-14 13:07:43 +0100733
734 if (gfs2_is_stuffed(ip)) {
735 error = gfs2_unstuff_dinode(ip, NULL);
736 if (unlikely(error))
737 goto out;
738 }
739
Benjamin Marzinski64dd1532011-09-12 18:15:24 -0500740 while (len) {
741 struct buffer_head bh_map = { .b_state = 0, .b_blocknr = 0 };
742 bh_map.b_size = len;
743 set_buffer_zeronew(&bh_map);
Christoph Hellwig2fe17c12011-01-14 13:07:43 +0100744
Benjamin Marzinski64dd1532011-09-12 18:15:24 -0500745 error = gfs2_block_map(inode, lblock, &bh_map, 1);
746 if (unlikely(error))
Christoph Hellwig2fe17c12011-01-14 13:07:43 +0100747 goto out;
Benjamin Marzinski64dd1532011-09-12 18:15:24 -0500748 len -= bh_map.b_size;
749 nr_blks = bh_map.b_size >> inode->i_blkbits;
750 lblock += nr_blks;
751 if (!buffer_new(&bh_map))
752 continue;
753 if (unlikely(!buffer_zeronew(&bh_map))) {
754 error = -EIO;
755 goto out;
756 }
Christoph Hellwig2fe17c12011-01-14 13:07:43 +0100757 }
Christoph Hellwig2fe17c12011-01-14 13:07:43 +0100758out:
Benjamin Marzinski64dd1532011-09-12 18:15:24 -0500759 brelse(dibh);
Christoph Hellwig2fe17c12011-01-14 13:07:43 +0100760 return error;
761}
Abhi Dasd9be0cd2015-03-18 12:05:15 -0500762/**
763 * calc_max_reserv() - Reverse of write_calc_reserv. Given a number of
764 * blocks, determine how many bytes can be written.
765 * @ip: The inode in question.
766 * @len: Max cap of bytes. What we return in *len must be <= this.
767 * @data_blocks: Compute and return the number of data blocks needed
768 * @ind_blocks: Compute and return the number of indirect blocks needed
769 * @max_blocks: The total blocks available to work with.
770 *
771 * Returns: void, but @len, @data_blocks and @ind_blocks are filled in.
772 */
773static void calc_max_reserv(struct gfs2_inode *ip, loff_t *len,
774 unsigned int *data_blocks, unsigned int *ind_blocks,
775 unsigned int max_blocks)
Christoph Hellwig2fe17c12011-01-14 13:07:43 +0100776{
Abhi Dasd9be0cd2015-03-18 12:05:15 -0500777 loff_t max = *len;
Christoph Hellwig2fe17c12011-01-14 13:07:43 +0100778 const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
Christoph Hellwig2fe17c12011-01-14 13:07:43 +0100779 unsigned int tmp, max_data = max_blocks - 3 * (sdp->sd_max_height - 1);
780
781 for (tmp = max_data; tmp > sdp->sd_diptrs;) {
782 tmp = DIV_ROUND_UP(tmp, sdp->sd_inptrs);
783 max_data -= tmp;
784 }
Abhi Dasd9be0cd2015-03-18 12:05:15 -0500785
Christoph Hellwig2fe17c12011-01-14 13:07:43 +0100786 *data_blocks = max_data;
787 *ind_blocks = max_blocks - max_data;
788 *len = ((loff_t)max_data - 3) << sdp->sd_sb.sb_bsize_shift;
789 if (*len > max) {
790 *len = max;
791 gfs2_write_calc_reserv(ip, max, data_blocks, ind_blocks);
792 }
793}
794
Andrew Price9c9f1152014-11-12 17:24:03 +0000795static long __gfs2_fallocate(struct file *file, int mode, loff_t offset, loff_t len)
Christoph Hellwig2fe17c12011-01-14 13:07:43 +0100796{
Al Viro496ad9a2013-01-23 17:07:38 -0500797 struct inode *inode = file_inode(file);
Christoph Hellwig2fe17c12011-01-14 13:07:43 +0100798 struct gfs2_sbd *sdp = GFS2_SB(inode);
799 struct gfs2_inode *ip = GFS2_I(inode);
Steven Whitehouse7b9cff42013-10-02 11:13:25 +0100800 struct gfs2_alloc_parms ap = { .aflags = 0, };
Christoph Hellwig2fe17c12011-01-14 13:07:43 +0100801 unsigned int data_blocks = 0, ind_blocks = 0, rblocks;
Abhi Dasd9be0cd2015-03-18 12:05:15 -0500802 loff_t bytes, max_bytes, max_blks = UINT_MAX;
Christoph Hellwig2fe17c12011-01-14 13:07:43 +0100803 int error;
Steven Whitehouse4442f2e2011-11-21 10:01:25 +0000804 const loff_t pos = offset;
805 const loff_t count = len;
Benjamin Marzinski6905d9e2011-04-26 01:13:24 -0500806 loff_t bsize_mask = ~((loff_t)sdp->sd_sb.sb_bsize - 1);
Christoph Hellwig2fe17c12011-01-14 13:07:43 +0100807 loff_t next = (offset + len - 1) >> sdp->sd_sb.sb_bsize_shift;
Benjamin Marzinski64dd1532011-09-12 18:15:24 -0500808 loff_t max_chunk_size = UINT_MAX & bsize_mask;
Bob Petersona0846a52014-02-06 10:43:50 -0500809
Christoph Hellwig2fe17c12011-01-14 13:07:43 +0100810 next = (next + 1) << sdp->sd_sb.sb_bsize_shift;
811
Benjamin Marzinski6905d9e2011-04-26 01:13:24 -0500812 offset &= bsize_mask;
Christoph Hellwig2fe17c12011-01-14 13:07:43 +0100813
814 len = next - offset;
815 bytes = sdp->sd_max_rg_data * sdp->sd_sb.sb_bsize / 2;
816 if (!bytes)
817 bytes = UINT_MAX;
Benjamin Marzinski6905d9e2011-04-26 01:13:24 -0500818 bytes &= bsize_mask;
819 if (bytes == 0)
820 bytes = sdp->sd_sb.sb_bsize;
Christoph Hellwig2fe17c12011-01-14 13:07:43 +0100821
Steven Whitehouseda1dfb62012-07-26 11:30:54 +0100822 gfs2_size_hint(file, offset, len);
Bob Peterson8e2e0042012-07-19 08:12:40 -0400823
Abhi Dasd9be0cd2015-03-18 12:05:15 -0500824 gfs2_write_calc_reserv(ip, PAGE_SIZE, &data_blocks, &ind_blocks);
825 ap.min_target = data_blocks + ind_blocks;
826
Christoph Hellwig2fe17c12011-01-14 13:07:43 +0100827 while (len > 0) {
828 if (len < bytes)
829 bytes = len;
Benjamin Marzinski58a7d5f2012-03-08 13:16:32 -0600830 if (!gfs2_write_alloc_required(ip, offset, bytes)) {
831 len -= bytes;
832 offset += bytes;
833 continue;
834 }
Abhi Dasd9be0cd2015-03-18 12:05:15 -0500835
836 /* We need to determine how many bytes we can actually
837 * fallocate without exceeding quota or going over the
838 * end of the fs. We start off optimistically by assuming
839 * we can write max_bytes */
840 max_bytes = (len > max_chunk_size) ? max_chunk_size : len;
841
842 /* Since max_bytes is most likely a theoretical max, we
843 * calculate a more realistic 'bytes' to serve as a good
844 * starting point for the number of bytes we may be able
845 * to write */
Christoph Hellwig2fe17c12011-01-14 13:07:43 +0100846 gfs2_write_calc_reserv(ip, bytes, &data_blocks, &ind_blocks);
Steven Whitehouse7b9cff42013-10-02 11:13:25 +0100847 ap.target = data_blocks + ind_blocks;
Abhi Dasb8fbf472015-03-18 12:03:41 -0500848
849 error = gfs2_quota_lock_check(ip, &ap);
Christoph Hellwig2fe17c12011-01-14 13:07:43 +0100850 if (error)
851 return error;
Abhi Dasd9be0cd2015-03-18 12:05:15 -0500852 /* ap.allowed tells us how many blocks quota will allow
853 * us to write. Check if this reduces max_blks */
854 if (ap.allowed && ap.allowed < max_blks)
855 max_blks = ap.allowed;
Christoph Hellwig2fe17c12011-01-14 13:07:43 +0100856
Steven Whitehouse7b9cff42013-10-02 11:13:25 +0100857 error = gfs2_inplace_reserve(ip, &ap);
Abhi Dasd9be0cd2015-03-18 12:05:15 -0500858 if (error)
Christoph Hellwig2fe17c12011-01-14 13:07:43 +0100859 goto out_qunlock;
Abhi Dasd9be0cd2015-03-18 12:05:15 -0500860
861 /* check if the selected rgrp limits our max_blks further */
862 if (ap.allowed && ap.allowed < max_blks)
863 max_blks = ap.allowed;
864
865 /* Almost done. Calculate bytes that can be written using
866 * max_blks. We also recompute max_bytes, data_blocks and
867 * ind_blocks */
868 calc_max_reserv(ip, &max_bytes, &data_blocks,
869 &ind_blocks, max_blks);
Christoph Hellwig2fe17c12011-01-14 13:07:43 +0100870
871 rblocks = RES_DINODE + ind_blocks + RES_STATFS + RES_QUOTA +
Steven Whitehouse71f890f2012-07-30 14:53:19 +0100872 RES_RG_HDR + gfs2_rg_blocks(ip, data_blocks + ind_blocks);
Christoph Hellwig2fe17c12011-01-14 13:07:43 +0100873 if (gfs2_is_jdata(ip))
874 rblocks += data_blocks ? data_blocks : 1;
875
876 error = gfs2_trans_begin(sdp, rblocks,
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +0300877 PAGE_SIZE/sdp->sd_sb.sb_bsize);
Christoph Hellwig2fe17c12011-01-14 13:07:43 +0100878 if (error)
879 goto out_trans_fail;
880
881 error = fallocate_chunk(inode, offset, max_bytes, mode);
882 gfs2_trans_end(sdp);
883
884 if (error)
885 goto out_trans_fail;
886
887 len -= max_bytes;
888 offset += max_bytes;
889 gfs2_inplace_release(ip);
890 gfs2_quota_unlock(ip);
Christoph Hellwig2fe17c12011-01-14 13:07:43 +0100891 }
Steven Whitehouse4442f2e2011-11-21 10:01:25 +0000892
Andrew Price18858672014-11-12 17:24:04 +0000893 if (!(mode & FALLOC_FL_KEEP_SIZE) && (pos + count) > inode->i_size) {
894 i_size_write(inode, pos + count);
Andrew Price98f1a692014-11-12 17:24:05 +0000895 file_update_time(file);
Andrew Price4b813f02015-09-22 07:41:21 -0500896 mark_inode_dirty(inode);
Andrew Price18858672014-11-12 17:24:04 +0000897 }
898
Christoph Hellwigdde0c2e2016-04-07 08:52:00 -0700899 if ((file->f_flags & O_DSYNC) || IS_SYNC(file->f_mapping->host))
900 return vfs_fsync_range(file, pos, pos + count - 1,
901 (file->f_flags & __O_SYNC) ? 0 : 1);
902 return 0;
Christoph Hellwig2fe17c12011-01-14 13:07:43 +0100903
904out_trans_fail:
905 gfs2_inplace_release(ip);
906out_qunlock:
907 gfs2_quota_unlock(ip);
Andrew Price9c9f1152014-11-12 17:24:03 +0000908 return error;
909}
910
911static long gfs2_fallocate(struct file *file, int mode, loff_t offset, loff_t len)
912{
913 struct inode *inode = file_inode(file);
914 struct gfs2_inode *ip = GFS2_I(inode);
915 struct gfs2_holder gh;
916 int ret;
917
Abhi Das86066912015-06-09 09:16:46 -0500918 if ((mode & ~FALLOC_FL_KEEP_SIZE) || gfs2_is_jdata(ip))
Andrew Price9c9f1152014-11-12 17:24:03 +0000919 return -EOPNOTSUPP;
920
Al Viro59551022016-01-22 15:40:57 -0500921 inode_lock(inode);
Andrew Price9c9f1152014-11-12 17:24:03 +0000922
923 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
924 ret = gfs2_glock_nq(&gh);
925 if (ret)
926 goto out_uninit;
927
928 if (!(mode & FALLOC_FL_KEEP_SIZE) &&
929 (offset + len) > inode->i_size) {
930 ret = inode_newsize_ok(inode, offset + len);
931 if (ret)
932 goto out_unlock;
933 }
934
935 ret = get_write_access(inode);
936 if (ret)
937 goto out_unlock;
938
Bob Petersonb54e9a02015-10-26 10:40:28 -0500939 ret = gfs2_rsqa_alloc(ip);
Andrew Price9c9f1152014-11-12 17:24:03 +0000940 if (ret)
941 goto out_putw;
942
943 ret = __gfs2_fallocate(file, mode, offset, len);
944 if (ret)
Bob Petersona097dc7e2015-07-16 08:28:04 -0500945 gfs2_rs_deltree(&ip->i_res);
946
Andrew Price9c9f1152014-11-12 17:24:03 +0000947out_putw:
948 put_write_access(inode);
Christoph Hellwig2fe17c12011-01-14 13:07:43 +0100949out_unlock:
Bob Petersona0846a52014-02-06 10:43:50 -0500950 gfs2_glock_dq(&gh);
Christoph Hellwig2fe17c12011-01-14 13:07:43 +0100951out_uninit:
Bob Petersona0846a52014-02-06 10:43:50 -0500952 gfs2_holder_uninit(&gh);
Al Viro59551022016-01-22 15:40:57 -0500953 inode_unlock(inode);
Andrew Price9c9f1152014-11-12 17:24:03 +0000954 return ret;
Christoph Hellwig2fe17c12011-01-14 13:07:43 +0100955}
956
Bob Petersonf1ea6f42015-02-24 07:22:28 -0600957static ssize_t gfs2_file_splice_write(struct pipe_inode_info *pipe,
958 struct file *out, loff_t *ppos,
959 size_t len, unsigned int flags)
960{
961 int error;
962 struct gfs2_inode *ip = GFS2_I(out->f_mapping->host);
963
Bob Petersonb54e9a02015-10-26 10:40:28 -0500964 error = gfs2_rsqa_alloc(ip);
Bob Petersonf1ea6f42015-02-24 07:22:28 -0600965 if (error)
966 return (ssize_t)error;
967
968 gfs2_size_hint(out, *ppos, len);
969
970 return iter_file_splice_write(pipe, out, ppos, len, flags);
971}
972
Steven Whitehousef057f6c2009-01-12 10:43:39 +0000973#ifdef CONFIG_GFS2_FS_LOCKING_DLM
974
David Teiglandb3b94fa2006-01-16 16:50:04 +0000975/**
976 * gfs2_lock - acquire/release a posix lock on a file
977 * @file: the file pointer
978 * @cmd: either modify or retrieve lock state, possibly wait
979 * @fl: type and range of lock
980 *
981 * Returns: errno
982 */
983
984static int gfs2_lock(struct file *file, int cmd, struct file_lock *fl)
985{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400986 struct gfs2_inode *ip = GFS2_I(file->f_mapping->host);
987 struct gfs2_sbd *sdp = GFS2_SB(file->f_mapping->host);
Steven Whitehousef057f6c2009-01-12 10:43:39 +0000988 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000989
David Teiglandb3b94fa2006-01-16 16:50:04 +0000990 if (!(fl->fl_flags & FL_POSIX))
991 return -ENOLCK;
Sachin Prabhu720e7742010-03-11 12:24:45 -0500992 if (__mandatory_lock(&ip->i_inode) && fl->fl_type != F_UNLCK)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000993 return -ENOLCK;
994
Marc Eshel586759f2006-11-14 16:37:25 -0500995 if (cmd == F_CANCELLK) {
996 /* Hack: */
997 cmd = F_SETLK;
998 fl->fl_type = F_UNLCK;
999 }
Steven Whitehousec2952d22013-03-14 15:49:59 +00001000 if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags))) {
1001 if (fl->fl_type == F_UNLCK)
Benjamin Coddington4f656362015-10-22 13:38:14 -04001002 locks_lock_file_wait(file, fl);
Steven Whitehousef057f6c2009-01-12 10:43:39 +00001003 return -EIO;
Steven Whitehousec2952d22013-03-14 15:49:59 +00001004 }
David Teiglandb3b94fa2006-01-16 16:50:04 +00001005 if (IS_GETLK(cmd))
Steven Whitehousef057f6c2009-01-12 10:43:39 +00001006 return dlm_posix_get(ls->ls_dlm, ip->i_no_addr, file, fl);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001007 else if (fl->fl_type == F_UNLCK)
Steven Whitehousef057f6c2009-01-12 10:43:39 +00001008 return dlm_posix_unlock(ls->ls_dlm, ip->i_no_addr, file, fl);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001009 else
Steven Whitehousef057f6c2009-01-12 10:43:39 +00001010 return dlm_posix_lock(ls->ls_dlm, ip->i_no_addr, file, cmd, fl);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001011}
1012
David Teiglandb3b94fa2006-01-16 16:50:04 +00001013static int do_flock(struct file *file, int cmd, struct file_lock *fl)
1014{
Steven Whitehouse5c676f62006-02-27 17:23:27 -05001015 struct gfs2_file *fp = file->private_data;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001016 struct gfs2_holder *fl_gh = &fp->f_fl_gh;
Al Viro496ad9a2013-01-23 17:07:38 -05001017 struct gfs2_inode *ip = GFS2_I(file_inode(file));
David Teiglandb3b94fa2006-01-16 16:50:04 +00001018 struct gfs2_glock *gl;
1019 unsigned int state;
Bob Petersonb58bf402015-07-24 09:45:43 -05001020 u16 flags;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001021 int error = 0;
Bob Peterson2ddfbdd2014-08-20 12:44:45 -04001022 int sleeptime;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001023
1024 state = (fl->fl_type == F_WRLCK) ? LM_ST_EXCLUSIVE : LM_ST_SHARED;
Bob Peterson2ddfbdd2014-08-20 12:44:45 -04001025 flags = (IS_SETLKW(cmd) ? 0 : LM_FLAG_TRY_1CB) | GL_EXACT;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001026
Steven Whitehousef55ab262006-02-21 12:51:39 +00001027 mutex_lock(&fp->f_fl_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001028
1029 gl = fl_gh->gh_gl;
1030 if (gl) {
1031 if (fl_gh->gh_state == state)
1032 goto out;
Benjamin Coddington4f656362015-10-22 13:38:14 -04001033 locks_lock_file_wait(file,
Junxiao Bia93a99832015-12-22 08:06:08 -06001034 &(struct file_lock) {
1035 .fl_type = F_UNLCK,
1036 .fl_flags = FL_FLOCK
1037 });
Bob Peterson5bef3e72014-06-26 10:46:25 -04001038 gfs2_glock_dq(fl_gh);
Abhijith Dasb4c20162007-09-13 23:35:27 -05001039 gfs2_holder_reinit(state, flags, fl_gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001040 } else {
Steven Whitehouse6802e342008-05-21 17:03:22 +01001041 error = gfs2_glock_get(GFS2_SB(&ip->i_inode), ip->i_no_addr,
1042 &gfs2_flock_glops, CREATE, &gl);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001043 if (error)
1044 goto out;
Abhijith Dasb4c20162007-09-13 23:35:27 -05001045 gfs2_holder_init(gl, state, flags, fl_gh);
1046 gfs2_glock_put(gl);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001047 }
Bob Peterson2ddfbdd2014-08-20 12:44:45 -04001048 for (sleeptime = 1; sleeptime <= 4; sleeptime <<= 1) {
1049 error = gfs2_glock_nq(fl_gh);
1050 if (error != GLR_TRYFAILED)
1051 break;
1052 fl_gh->gh_flags = LM_FLAG_TRY | GL_EXACT;
1053 fl_gh->gh_error = 0;
1054 msleep(sleeptime);
1055 }
David Teiglandb3b94fa2006-01-16 16:50:04 +00001056 if (error) {
1057 gfs2_holder_uninit(fl_gh);
1058 if (error == GLR_TRYFAILED)
1059 error = -EAGAIN;
1060 } else {
Benjamin Coddington4f656362015-10-22 13:38:14 -04001061 error = locks_lock_file_wait(file, fl);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001062 gfs2_assert_warn(GFS2_SB(&ip->i_inode), !error);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001063 }
1064
Steven Whitehouse420b9e52006-07-31 15:42:17 -04001065out:
Steven Whitehousef55ab262006-02-21 12:51:39 +00001066 mutex_unlock(&fp->f_fl_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001067 return error;
1068}
1069
1070static void do_unflock(struct file *file, struct file_lock *fl)
1071{
Steven Whitehouse5c676f62006-02-27 17:23:27 -05001072 struct gfs2_file *fp = file->private_data;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001073 struct gfs2_holder *fl_gh = &fp->f_fl_gh;
1074
Steven Whitehousef55ab262006-02-21 12:51:39 +00001075 mutex_lock(&fp->f_fl_mutex);
Benjamin Coddington4f656362015-10-22 13:38:14 -04001076 locks_lock_file_wait(file, fl);
Andreas Gruenbacher6df9f9a2016-06-17 07:31:27 -05001077 if (gfs2_holder_initialized(fl_gh)) {
Bob Peterson2ddfbdd2014-08-20 12:44:45 -04001078 gfs2_glock_dq(fl_gh);
Steven Whitehouse0a334432011-03-09 11:14:32 +00001079 gfs2_holder_uninit(fl_gh);
1080 }
Steven Whitehousef55ab262006-02-21 12:51:39 +00001081 mutex_unlock(&fp->f_fl_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001082}
1083
1084/**
1085 * gfs2_flock - acquire/release a flock lock on a file
1086 * @file: the file pointer
1087 * @cmd: either modify or retrieve lock state, possibly wait
1088 * @fl: type and range of lock
1089 *
1090 * Returns: errno
1091 */
1092
1093static int gfs2_flock(struct file *file, int cmd, struct file_lock *fl)
1094{
David Teiglandb3b94fa2006-01-16 16:50:04 +00001095 if (!(fl->fl_flags & FL_FLOCK))
1096 return -ENOLCK;
Abhijith Dasa12af1e2009-06-01 12:30:03 -05001097 if (fl->fl_type & LOCK_MAND)
1098 return -EOPNOTSUPP;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001099
David Teiglandb3b94fa2006-01-16 16:50:04 +00001100 if (fl->fl_type == F_UNLCK) {
1101 do_unflock(file, fl);
1102 return 0;
Steven Whitehoused00223f2006-10-02 10:28:05 -04001103 } else {
David Teiglandb3b94fa2006-01-16 16:50:04 +00001104 return do_flock(file, cmd, fl);
Steven Whitehoused00223f2006-10-02 10:28:05 -04001105 }
David Teiglandb3b94fa2006-01-16 16:50:04 +00001106}
1107
Christoph Hellwig10d21982009-04-07 19:42:17 +02001108const struct file_operations gfs2_file_fops = {
Steven Whitehouse26c1a572006-09-04 15:32:10 -04001109 .llseek = gfs2_llseek,
Al Viroaad4f8b2014-04-02 14:33:16 -04001110 .read_iter = generic_file_read_iter,
Al Viroda56e452014-04-03 14:11:01 -04001111 .write_iter = gfs2_file_write_iter,
Steven Whitehouse26c1a572006-09-04 15:32:10 -04001112 .unlocked_ioctl = gfs2_ioctl,
1113 .mmap = gfs2_mmap,
1114 .open = gfs2_open,
Bob Petersondf3fd112012-04-11 12:56:41 -04001115 .release = gfs2_release,
Steven Whitehouse26c1a572006-09-04 15:32:10 -04001116 .fsync = gfs2_fsync,
1117 .lock = gfs2_lock,
Steven Whitehouse26c1a572006-09-04 15:32:10 -04001118 .flock = gfs2_flock,
Al Viro82c156f2016-09-22 23:35:42 -04001119 .splice_read = generic_file_splice_read,
Bob Petersonf42a69f2015-02-19 08:02:16 -06001120 .splice_write = gfs2_file_splice_write,
Jeff Layton1c994a02014-08-27 06:49:41 -04001121 .setlease = simple_nosetlease,
Christoph Hellwig2fe17c12011-01-14 13:07:43 +01001122 .fallocate = gfs2_fallocate,
David Teiglandb3b94fa2006-01-16 16:50:04 +00001123};
1124
Christoph Hellwig10d21982009-04-07 19:42:17 +02001125const struct file_operations gfs2_dir_fops = {
Al Viro1d1bb232016-05-12 17:00:20 -04001126 .iterate_shared = gfs2_readdir,
Steven Whitehouse26c1a572006-09-04 15:32:10 -04001127 .unlocked_ioctl = gfs2_ioctl,
1128 .open = gfs2_open,
Bob Petersondf3fd112012-04-11 12:56:41 -04001129 .release = gfs2_release,
Steven Whitehouse26c1a572006-09-04 15:32:10 -04001130 .fsync = gfs2_fsync,
1131 .lock = gfs2_lock,
1132 .flock = gfs2_flock,
Arnd Bergmann6038f372010-08-15 18:52:59 +02001133 .llseek = default_llseek,
David Teiglandb3b94fa2006-01-16 16:50:04 +00001134};
1135
Steven Whitehousef057f6c2009-01-12 10:43:39 +00001136#endif /* CONFIG_GFS2_FS_LOCKING_DLM */
1137
Christoph Hellwig10d21982009-04-07 19:42:17 +02001138const struct file_operations gfs2_file_fops_nolock = {
Wendy Chengc97bfe42007-11-29 17:56:51 -05001139 .llseek = gfs2_llseek,
Al Viroaad4f8b2014-04-02 14:33:16 -04001140 .read_iter = generic_file_read_iter,
Al Viroda56e452014-04-03 14:11:01 -04001141 .write_iter = gfs2_file_write_iter,
Wendy Chengc97bfe42007-11-29 17:56:51 -05001142 .unlocked_ioctl = gfs2_ioctl,
1143 .mmap = gfs2_mmap,
1144 .open = gfs2_open,
Bob Petersondf3fd112012-04-11 12:56:41 -04001145 .release = gfs2_release,
Wendy Chengc97bfe42007-11-29 17:56:51 -05001146 .fsync = gfs2_fsync,
Al Viro82c156f2016-09-22 23:35:42 -04001147 .splice_read = generic_file_splice_read,
Bob Petersonf42a69f2015-02-19 08:02:16 -06001148 .splice_write = gfs2_file_splice_write,
Steven Whitehousef057f6c2009-01-12 10:43:39 +00001149 .setlease = generic_setlease,
Christoph Hellwig2fe17c12011-01-14 13:07:43 +01001150 .fallocate = gfs2_fallocate,
Wendy Chengc97bfe42007-11-29 17:56:51 -05001151};
1152
Christoph Hellwig10d21982009-04-07 19:42:17 +02001153const struct file_operations gfs2_dir_fops_nolock = {
Al Viro1d1bb232016-05-12 17:00:20 -04001154 .iterate_shared = gfs2_readdir,
Wendy Chengc97bfe42007-11-29 17:56:51 -05001155 .unlocked_ioctl = gfs2_ioctl,
1156 .open = gfs2_open,
Bob Petersondf3fd112012-04-11 12:56:41 -04001157 .release = gfs2_release,
Wendy Chengc97bfe42007-11-29 17:56:51 -05001158 .fsync = gfs2_fsync,
Arnd Bergmann6038f372010-08-15 18:52:59 +02001159 .llseek = default_llseek,
Wendy Chengc97bfe42007-11-29 17:56:51 -05001160};
1161