David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. |
Steven Whitehouse | 3a8a9a1 | 2006-05-18 15:09:15 -0400 | [diff] [blame] | 3 | * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 4 | * |
| 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 Whitehouse | e9fc2aa | 2006-09-01 11:05:15 -0400 | [diff] [blame] | 7 | * of the GNU General Public License version 2. |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 8 | */ |
| 9 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 10 | #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 Szeredi | f58ba88 | 2008-07-02 21:12:01 +0200 | [diff] [blame] | 18 | #include <linux/mount.h> |
Steven Whitehouse | 18ec7d5 | 2006-02-08 11:50:51 +0000 | [diff] [blame] | 19 | #include <linux/fs.h> |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 20 | #include <linux/gfs2_ondisk.h> |
Christoph Hellwig | 2fe17c1 | 2011-01-14 13:07:43 +0100 | [diff] [blame] | 21 | #include <linux/falloc.h> |
| 22 | #include <linux/swap.h> |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 23 | #include <linux/crc32.h> |
Steven Whitehouse | 33c3de3 | 2006-11-30 10:14:32 -0500 | [diff] [blame] | 24 | #include <linux/writeback.h> |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 25 | #include <asm/uaccess.h> |
Steven Whitehouse | f057f6c | 2009-01-12 10:43:39 +0000 | [diff] [blame] | 26 | #include <linux/dlm.h> |
| 27 | #include <linux/dlm_plock.h> |
Kent Overstreet | a27bb33 | 2013-05-07 16:19:08 -0700 | [diff] [blame] | 28 | #include <linux/aio.h> |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 29 | |
| 30 | #include "gfs2.h" |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 31 | #include "incore.h" |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 32 | #include "bmap.h" |
| 33 | #include "dir.h" |
| 34 | #include "glock.h" |
| 35 | #include "glops.h" |
| 36 | #include "inode.h" |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 37 | #include "log.h" |
| 38 | #include "meta_io.h" |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 39 | #include "quota.h" |
| 40 | #include "rgrp.h" |
| 41 | #include "trans.h" |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 42 | #include "util.h" |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 43 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 44 | /** |
| 45 | * gfs2_llseek - seek to a location in a file |
| 46 | * @file: the file |
| 47 | * @offset: the offset |
Andrew Morton | 965c8e5 | 2012-12-17 15:59:39 -0800 | [diff] [blame] | 48 | * @whence: Where to seek from (SEEK_SET, SEEK_CUR, or SEEK_END) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 49 | * |
| 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 Morton | 965c8e5 | 2012-12-17 15:59:39 -0800 | [diff] [blame] | 56 | static loff_t gfs2_llseek(struct file *file, loff_t offset, int whence) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 57 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 58 | struct gfs2_inode *ip = GFS2_I(file->f_mapping->host); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 59 | struct gfs2_holder i_gh; |
| 60 | loff_t error; |
| 61 | |
Andrew Morton | 965c8e5 | 2012-12-17 15:59:39 -0800 | [diff] [blame] | 62 | switch (whence) { |
Steven Whitehouse | 9453615 | 2011-08-23 10:19:25 +0100 | [diff] [blame] | 63 | case SEEK_END: /* These reference inode->i_size */ |
| 64 | case SEEK_DATA: |
| 65 | case SEEK_HOLE: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 66 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, |
| 67 | &i_gh); |
| 68 | if (!error) { |
Andrew Morton | 965c8e5 | 2012-12-17 15:59:39 -0800 | [diff] [blame] | 69 | error = generic_file_llseek(file, offset, whence); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 70 | gfs2_glock_dq_uninit(&i_gh); |
| 71 | } |
Steven Whitehouse | 9453615 | 2011-08-23 10:19:25 +0100 | [diff] [blame] | 72 | break; |
| 73 | case SEEK_CUR: |
| 74 | case SEEK_SET: |
Andrew Morton | 965c8e5 | 2012-12-17 15:59:39 -0800 | [diff] [blame] | 75 | error = generic_file_llseek(file, offset, whence); |
Steven Whitehouse | 9453615 | 2011-08-23 10:19:25 +0100 | [diff] [blame] | 76 | break; |
| 77 | default: |
| 78 | error = -EINVAL; |
| 79 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 80 | |
| 81 | return error; |
| 82 | } |
| 83 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 84 | /** |
Al Viro | d81a8ef | 2013-05-16 14:14:48 -0400 | [diff] [blame] | 85 | * gfs2_readdir - Iterator for a directory |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 86 | * @file: The directory to read from |
Al Viro | d81a8ef | 2013-05-16 14:14:48 -0400 | [diff] [blame] | 87 | * @ctx: What to feed directory entries to |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 88 | * |
| 89 | * Returns: errno |
| 90 | */ |
| 91 | |
Al Viro | d81a8ef | 2013-05-16 14:14:48 -0400 | [diff] [blame] | 92 | static int gfs2_readdir(struct file *file, struct dir_context *ctx) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 93 | { |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 94 | struct inode *dir = file->f_mapping->host; |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 95 | struct gfs2_inode *dip = GFS2_I(dir); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 96 | struct gfs2_holder d_gh; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 97 | int error; |
| 98 | |
Al Viro | d81a8ef | 2013-05-16 14:14:48 -0400 | [diff] [blame] | 99 | error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh); |
| 100 | if (error) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 101 | return error; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 102 | |
Al Viro | d81a8ef | 2013-05-16 14:14:48 -0400 | [diff] [blame] | 103 | error = gfs2_dir_read(dir, ctx, &file->f_ra); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 104 | |
| 105 | gfs2_glock_dq_uninit(&d_gh); |
| 106 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 107 | return error; |
| 108 | } |
| 109 | |
Steven Whitehouse | 128e5eb | 2006-10-02 11:24:43 -0400 | [diff] [blame] | 110 | /** |
| 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 | */ |
| 120 | static 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 Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 131 | |
Steven Whitehouse | 128e5eb | 2006-10-02 11:24:43 -0400 | [diff] [blame] | 132 | static 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 Whitehouse | b9af7ca | 2007-07-18 11:40:06 +0100 | [diff] [blame] | 138 | [14] = GFS2_DIF_INHERIT_JDATA, |
Steven Whitehouse | 23d0bb8 | 2012-05-28 15:26:56 +0100 | [diff] [blame] | 139 | [17] = GFS2_DIF_TOPDIR, |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 140 | }; |
| 141 | |
Steven Whitehouse | 128e5eb | 2006-10-02 11:24:43 -0400 | [diff] [blame] | 142 | static 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 Whitehouse | 23d0bb8 | 2012-05-28 15:26:56 +0100 | [diff] [blame] | 148 | [gfs2fl_TopLevel] = FS_TOPDIR_FL, |
Steven Whitehouse | 128e5eb | 2006-10-02 11:24:43 -0400 | [diff] [blame] | 149 | [gfs2fl_InheritJdata] = FS_JOURNAL_DATA_FL, |
Steven Whitehouse | 7ea9ea8 | 2006-03-31 15:01:28 -0500 | [diff] [blame] | 150 | }; |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 151 | |
Steven Whitehouse | b09e593 | 2006-04-07 11:17:32 -0400 | [diff] [blame] | 152 | static int gfs2_get_flags(struct file *filp, u32 __user *ptr) |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 153 | { |
Al Viro | 496ad9a | 2013-01-23 17:07:38 -0500 | [diff] [blame] | 154 | struct inode *inode = file_inode(filp); |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 155 | struct gfs2_inode *ip = GFS2_I(inode); |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 156 | struct gfs2_holder gh; |
| 157 | int error; |
Steven Whitehouse | 128e5eb | 2006-10-02 11:24:43 -0400 | [diff] [blame] | 158 | u32 fsflags; |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 159 | |
Steven Whitehouse | 719ee34 | 2008-09-18 13:53:59 +0100 | [diff] [blame] | 160 | gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &gh); |
| 161 | error = gfs2_glock_nq(&gh); |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 162 | if (error) |
| 163 | return error; |
Steven Whitehouse | 907b9bc | 2006-09-25 09:26:04 -0400 | [diff] [blame] | 164 | |
Steven Whitehouse | 383f01f | 2008-11-04 10:05:22 +0000 | [diff] [blame] | 165 | fsflags = fsflags_cvt(gfs2_to_fsflags, ip->i_diskflags); |
| 166 | if (!S_ISDIR(inode->i_mode) && ip->i_diskflags & GFS2_DIF_JDATA) |
Steven Whitehouse | c9f6a6b | 2008-07-10 16:09:29 +0100 | [diff] [blame] | 167 | fsflags |= FS_JOURNAL_DATA_FL; |
Steven Whitehouse | 128e5eb | 2006-10-02 11:24:43 -0400 | [diff] [blame] | 168 | if (put_user(fsflags, ptr)) |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 169 | error = -EFAULT; |
| 170 | |
Steven Whitehouse | 3cc3f71 | 2007-10-15 15:40:33 +0100 | [diff] [blame] | 171 | gfs2_glock_dq(&gh); |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 172 | gfs2_holder_uninit(&gh); |
| 173 | return error; |
| 174 | } |
| 175 | |
Steven Whitehouse | 6b124d8 | 2006-11-08 12:51:06 -0500 | [diff] [blame] | 176 | void gfs2_set_inode_flags(struct inode *inode) |
| 177 | { |
| 178 | struct gfs2_inode *ip = GFS2_I(inode); |
Steven Whitehouse | 6b124d8 | 2006-11-08 12:51:06 -0500 | [diff] [blame] | 179 | unsigned int flags = inode->i_flags; |
| 180 | |
Steven Whitehouse | 9964afb | 2011-06-16 14:06:55 +0100 | [diff] [blame] | 181 | flags &= ~(S_SYNC|S_APPEND|S_IMMUTABLE|S_NOATIME|S_DIRSYNC|S_NOSEC); |
| 182 | if ((ip->i_eattr == 0) && !is_sxid(inode->i_mode)) |
| 183 | inode->i_flags |= S_NOSEC; |
Steven Whitehouse | 383f01f | 2008-11-04 10:05:22 +0000 | [diff] [blame] | 184 | if (ip->i_diskflags & GFS2_DIF_IMMUTABLE) |
Steven Whitehouse | 6b124d8 | 2006-11-08 12:51:06 -0500 | [diff] [blame] | 185 | flags |= S_IMMUTABLE; |
Steven Whitehouse | 383f01f | 2008-11-04 10:05:22 +0000 | [diff] [blame] | 186 | if (ip->i_diskflags & GFS2_DIF_APPENDONLY) |
Steven Whitehouse | 6b124d8 | 2006-11-08 12:51:06 -0500 | [diff] [blame] | 187 | flags |= S_APPEND; |
Steven Whitehouse | 383f01f | 2008-11-04 10:05:22 +0000 | [diff] [blame] | 188 | if (ip->i_diskflags & GFS2_DIF_NOATIME) |
Steven Whitehouse | 6b124d8 | 2006-11-08 12:51:06 -0500 | [diff] [blame] | 189 | flags |= S_NOATIME; |
Steven Whitehouse | 383f01f | 2008-11-04 10:05:22 +0000 | [diff] [blame] | 190 | if (ip->i_diskflags & GFS2_DIF_SYNC) |
Steven Whitehouse | 6b124d8 | 2006-11-08 12:51:06 -0500 | [diff] [blame] | 191 | flags |= S_SYNC; |
| 192 | inode->i_flags = flags; |
| 193 | } |
| 194 | |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 195 | /* Flags that can be set by user space */ |
| 196 | #define GFS2_FLAGS_USER_SET (GFS2_DIF_JDATA| \ |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 197 | GFS2_DIF_IMMUTABLE| \ |
| 198 | GFS2_DIF_APPENDONLY| \ |
| 199 | GFS2_DIF_NOATIME| \ |
| 200 | GFS2_DIF_SYNC| \ |
| 201 | GFS2_DIF_SYSTEM| \ |
Steven Whitehouse | 23d0bb8 | 2012-05-28 15:26:56 +0100 | [diff] [blame] | 202 | GFS2_DIF_TOPDIR| \ |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 203 | GFS2_DIF_INHERIT_JDATA) |
| 204 | |
| 205 | /** |
| 206 | * gfs2_set_flags - set flags on an inode |
| 207 | * @inode: The inode |
| 208 | * @flags: The flags to set |
| 209 | * @mask: Indicates which flags are valid |
| 210 | * |
| 211 | */ |
Steven Whitehouse | b09e593 | 2006-04-07 11:17:32 -0400 | [diff] [blame] | 212 | static int do_gfs2_set_flags(struct file *filp, u32 reqflags, u32 mask) |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 213 | { |
Al Viro | 496ad9a | 2013-01-23 17:07:38 -0500 | [diff] [blame] | 214 | struct inode *inode = file_inode(filp); |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 215 | struct gfs2_inode *ip = GFS2_I(inode); |
| 216 | struct gfs2_sbd *sdp = GFS2_SB(inode); |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 217 | struct buffer_head *bh; |
| 218 | struct gfs2_holder gh; |
| 219 | int error; |
Steven Whitehouse | 55eccc6 | 2006-04-04 14:29:30 -0400 | [diff] [blame] | 220 | u32 new_flags, flags; |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 221 | |
Al Viro | a561be7 | 2011-11-23 11:57:51 -0500 | [diff] [blame] | 222 | error = mnt_want_write_file(filp); |
Abhijith Das | 52f341c | 2006-07-21 02:03:21 -0400 | [diff] [blame] | 223 | if (error) |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 224 | return error; |
| 225 | |
Miklos Szeredi | f58ba88 | 2008-07-02 21:12:01 +0200 | [diff] [blame] | 226 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); |
| 227 | if (error) |
| 228 | goto out_drop_write; |
| 229 | |
Steven Whitehouse | 7df0e03 | 2010-05-24 14:36:48 +0100 | [diff] [blame] | 230 | error = -EACCES; |
Serge E. Hallyn | 2e14967 | 2011-03-23 16:43:26 -0700 | [diff] [blame] | 231 | if (!inode_owner_or_capable(inode)) |
Steven Whitehouse | 7df0e03 | 2010-05-24 14:36:48 +0100 | [diff] [blame] | 232 | goto out; |
| 233 | |
| 234 | error = 0; |
Steven Whitehouse | 383f01f | 2008-11-04 10:05:22 +0000 | [diff] [blame] | 235 | flags = ip->i_diskflags; |
Steven Whitehouse | 55eccc6 | 2006-04-04 14:29:30 -0400 | [diff] [blame] | 236 | new_flags = (flags & ~mask) | (reqflags & mask); |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 237 | if ((new_flags ^ flags) == 0) |
| 238 | goto out; |
| 239 | |
| 240 | error = -EINVAL; |
| 241 | if ((new_flags ^ flags) & ~GFS2_FLAGS_USER_SET) |
| 242 | goto out; |
| 243 | |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 244 | error = -EPERM; |
| 245 | if (IS_IMMUTABLE(inode) && (new_flags & GFS2_DIF_IMMUTABLE)) |
| 246 | goto out; |
| 247 | if (IS_APPEND(inode) && (new_flags & GFS2_DIF_APPENDONLY)) |
| 248 | goto out; |
Steven Whitehouse | 907b9bc | 2006-09-25 09:26:04 -0400 | [diff] [blame] | 249 | if (((new_flags ^ flags) & GFS2_DIF_IMMUTABLE) && |
Steven Whitehouse | b9cb981 | 2006-05-12 17:07:56 -0400 | [diff] [blame] | 250 | !capable(CAP_LINUX_IMMUTABLE)) |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 251 | goto out; |
Steven Whitehouse | b9cb981 | 2006-05-12 17:07:56 -0400 | [diff] [blame] | 252 | if (!IS_IMMUTABLE(inode)) { |
Al Viro | 10556cb | 2011-06-20 19:28:19 -0400 | [diff] [blame] | 253 | error = gfs2_permission(inode, MAY_WRITE); |
Steven Whitehouse | b9cb981 | 2006-05-12 17:07:56 -0400 | [diff] [blame] | 254 | if (error) |
| 255 | goto out; |
| 256 | } |
Steven Whitehouse | 5561093 | 2007-10-17 08:47:38 +0100 | [diff] [blame] | 257 | if ((flags ^ new_flags) & GFS2_DIF_JDATA) { |
| 258 | if (flags & GFS2_DIF_JDATA) |
| 259 | gfs2_log_flush(sdp, ip->i_gl); |
| 260 | error = filemap_fdatawrite(inode->i_mapping); |
| 261 | if (error) |
| 262 | goto out; |
| 263 | error = filemap_fdatawait(inode->i_mapping); |
| 264 | if (error) |
| 265 | goto out; |
| 266 | } |
Steven Whitehouse | 55eccc6 | 2006-04-04 14:29:30 -0400 | [diff] [blame] | 267 | error = gfs2_trans_begin(sdp, RES_DINODE, 0); |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 268 | if (error) |
| 269 | goto out; |
Steven Whitehouse | 55eccc6 | 2006-04-04 14:29:30 -0400 | [diff] [blame] | 270 | error = gfs2_meta_inode_buffer(ip, &bh); |
| 271 | if (error) |
| 272 | goto out_trans_end; |
Steven Whitehouse | 350a9b0 | 2012-12-14 12:36:02 +0000 | [diff] [blame] | 273 | gfs2_trans_add_meta(ip->i_gl, bh); |
Steven Whitehouse | 383f01f | 2008-11-04 10:05:22 +0000 | [diff] [blame] | 274 | ip->i_diskflags = new_flags; |
Steven Whitehouse | 539e5d6 | 2006-10-31 15:07:05 -0500 | [diff] [blame] | 275 | gfs2_dinode_out(ip, bh->b_data); |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 276 | brelse(bh); |
Steven Whitehouse | 6b124d8 | 2006-11-08 12:51:06 -0500 | [diff] [blame] | 277 | gfs2_set_inode_flags(inode); |
Steven Whitehouse | 5561093 | 2007-10-17 08:47:38 +0100 | [diff] [blame] | 278 | gfs2_set_aops(inode); |
Steven Whitehouse | 55eccc6 | 2006-04-04 14:29:30 -0400 | [diff] [blame] | 279 | out_trans_end: |
| 280 | gfs2_trans_end(sdp); |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 281 | out: |
| 282 | gfs2_glock_dq_uninit(&gh); |
Miklos Szeredi | f58ba88 | 2008-07-02 21:12:01 +0200 | [diff] [blame] | 283 | out_drop_write: |
Al Viro | 2a79f17 | 2011-12-09 08:06:57 -0500 | [diff] [blame] | 284 | mnt_drop_write_file(filp); |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 285 | return error; |
| 286 | } |
| 287 | |
Steven Whitehouse | b09e593 | 2006-04-07 11:17:32 -0400 | [diff] [blame] | 288 | static int gfs2_set_flags(struct file *filp, u32 __user *ptr) |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 289 | { |
Al Viro | 496ad9a | 2013-01-23 17:07:38 -0500 | [diff] [blame] | 290 | struct inode *inode = file_inode(filp); |
Steven Whitehouse | 128e5eb | 2006-10-02 11:24:43 -0400 | [diff] [blame] | 291 | u32 fsflags, gfsflags; |
Steven Whitehouse | 7df0e03 | 2010-05-24 14:36:48 +0100 | [diff] [blame] | 292 | |
Steven Whitehouse | 128e5eb | 2006-10-02 11:24:43 -0400 | [diff] [blame] | 293 | if (get_user(fsflags, ptr)) |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 294 | return -EFAULT; |
Steven Whitehouse | 7df0e03 | 2010-05-24 14:36:48 +0100 | [diff] [blame] | 295 | |
Steven Whitehouse | 128e5eb | 2006-10-02 11:24:43 -0400 | [diff] [blame] | 296 | gfsflags = fsflags_cvt(fsflags_to_gfs2, fsflags); |
Steven Whitehouse | b9af7ca | 2007-07-18 11:40:06 +0100 | [diff] [blame] | 297 | if (!S_ISDIR(inode->i_mode)) { |
Steven Whitehouse | 23d0bb8 | 2012-05-28 15:26:56 +0100 | [diff] [blame] | 298 | gfsflags &= ~GFS2_DIF_TOPDIR; |
Steven Whitehouse | b9af7ca | 2007-07-18 11:40:06 +0100 | [diff] [blame] | 299 | if (gfsflags & GFS2_DIF_INHERIT_JDATA) |
| 300 | gfsflags ^= (GFS2_DIF_JDATA | GFS2_DIF_INHERIT_JDATA); |
Steven Whitehouse | b9af7ca | 2007-07-18 11:40:06 +0100 | [diff] [blame] | 301 | return do_gfs2_set_flags(filp, gfsflags, ~0); |
| 302 | } |
| 303 | return do_gfs2_set_flags(filp, gfsflags, ~GFS2_DIF_JDATA); |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 304 | } |
| 305 | |
Steven Whitehouse | b09e593 | 2006-04-07 11:17:32 -0400 | [diff] [blame] | 306 | static long gfs2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 307 | { |
| 308 | switch(cmd) { |
Steven Whitehouse | 128e5eb | 2006-10-02 11:24:43 -0400 | [diff] [blame] | 309 | case FS_IOC_GETFLAGS: |
Steven Whitehouse | b09e593 | 2006-04-07 11:17:32 -0400 | [diff] [blame] | 310 | return gfs2_get_flags(filp, (u32 __user *)arg); |
Steven Whitehouse | 128e5eb | 2006-10-02 11:24:43 -0400 | [diff] [blame] | 311 | case FS_IOC_SETFLAGS: |
Steven Whitehouse | b09e593 | 2006-04-07 11:17:32 -0400 | [diff] [blame] | 312 | return gfs2_set_flags(filp, (u32 __user *)arg); |
Steven Whitehouse | 66fc061 | 2012-02-08 12:58:32 +0000 | [diff] [blame] | 313 | case FITRIM: |
| 314 | return gfs2_fitrim(filp, (void __user *)arg); |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 315 | } |
| 316 | return -ENOTTY; |
| 317 | } |
| 318 | |
Steven Whitehouse | 3cc3f71 | 2007-10-15 15:40:33 +0100 | [diff] [blame] | 319 | /** |
Steven Whitehouse | da1dfb6 | 2012-07-26 11:30:54 +0100 | [diff] [blame] | 320 | * gfs2_size_hint - Give a hint to the size of a write request |
| 321 | * @file: The struct file |
| 322 | * @offset: The file offset of the write |
| 323 | * @size: The length of the write |
| 324 | * |
| 325 | * When we are about to do a write, this function records the total |
| 326 | * write size in order to provide a suitable hint to the lower layers |
| 327 | * about how many blocks will be required. |
| 328 | * |
| 329 | */ |
| 330 | |
| 331 | static void gfs2_size_hint(struct file *filep, loff_t offset, size_t size) |
| 332 | { |
Al Viro | 496ad9a | 2013-01-23 17:07:38 -0500 | [diff] [blame] | 333 | struct inode *inode = file_inode(filep); |
Steven Whitehouse | da1dfb6 | 2012-07-26 11:30:54 +0100 | [diff] [blame] | 334 | struct gfs2_sbd *sdp = GFS2_SB(inode); |
| 335 | struct gfs2_inode *ip = GFS2_I(inode); |
| 336 | size_t blks = (size + sdp->sd_sb.sb_bsize - 1) >> sdp->sd_sb.sb_bsize_shift; |
| 337 | int hint = min_t(size_t, INT_MAX, blks); |
| 338 | |
| 339 | atomic_set(&ip->i_res->rs_sizehint, hint); |
| 340 | } |
| 341 | |
| 342 | /** |
Steven Whitehouse | 3cc3f71 | 2007-10-15 15:40:33 +0100 | [diff] [blame] | 343 | * gfs2_allocate_page_backing - Use bmap to allocate blocks |
| 344 | * @page: The (locked) page to allocate backing for |
| 345 | * |
| 346 | * We try to allocate all the blocks required for the page in |
| 347 | * one go. This might fail for various reasons, so we keep |
| 348 | * trying until all the blocks to back this page are allocated. |
| 349 | * If some of the blocks are already allocated, thats ok too. |
| 350 | */ |
| 351 | |
| 352 | static int gfs2_allocate_page_backing(struct page *page) |
| 353 | { |
| 354 | struct inode *inode = page->mapping->host; |
| 355 | struct buffer_head bh; |
| 356 | unsigned long size = PAGE_CACHE_SIZE; |
| 357 | u64 lblock = page->index << (PAGE_CACHE_SHIFT - inode->i_blkbits); |
| 358 | |
| 359 | do { |
| 360 | bh.b_state = 0; |
| 361 | bh.b_size = size; |
Bob Peterson | e9e1ef2 | 2007-12-10 14:13:27 -0600 | [diff] [blame] | 362 | gfs2_block_map(inode, lblock, &bh, 1); |
Steven Whitehouse | 3cc3f71 | 2007-10-15 15:40:33 +0100 | [diff] [blame] | 363 | if (!buffer_mapped(&bh)) |
| 364 | return -EIO; |
| 365 | size -= bh.b_size; |
| 366 | lblock += (bh.b_size >> inode->i_blkbits); |
| 367 | } while(size > 0); |
| 368 | return 0; |
| 369 | } |
| 370 | |
| 371 | /** |
| 372 | * gfs2_page_mkwrite - Make a shared, mmap()ed, page writable |
| 373 | * @vma: The virtual memory area |
| 374 | * @page: The page which is about to become writable |
| 375 | * |
| 376 | * When the page becomes writable, we need to ensure that we have |
| 377 | * blocks allocated on disk to back that page. |
| 378 | */ |
| 379 | |
Nick Piggin | c2ec175 | 2009-03-31 15:23:21 -0700 | [diff] [blame] | 380 | static int gfs2_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) |
Steven Whitehouse | 3cc3f71 | 2007-10-15 15:40:33 +0100 | [diff] [blame] | 381 | { |
Nick Piggin | c2ec175 | 2009-03-31 15:23:21 -0700 | [diff] [blame] | 382 | struct page *page = vmf->page; |
Al Viro | 496ad9a | 2013-01-23 17:07:38 -0500 | [diff] [blame] | 383 | struct inode *inode = file_inode(vma->vm_file); |
Steven Whitehouse | 3cc3f71 | 2007-10-15 15:40:33 +0100 | [diff] [blame] | 384 | struct gfs2_inode *ip = GFS2_I(inode); |
| 385 | struct gfs2_sbd *sdp = GFS2_SB(inode); |
| 386 | unsigned long last_index; |
Benjamin Marzinski | c8f554b | 2009-01-06 10:47:50 -0600 | [diff] [blame] | 387 | u64 pos = page->index << PAGE_CACHE_SHIFT; |
Steven Whitehouse | 3cc3f71 | 2007-10-15 15:40:33 +0100 | [diff] [blame] | 388 | unsigned int data_blocks, ind_blocks, rblocks; |
Steven Whitehouse | 3cc3f71 | 2007-10-15 15:40:33 +0100 | [diff] [blame] | 389 | struct gfs2_holder gh; |
Steven Whitehouse | 13d921e | 2011-09-07 15:12:51 +0100 | [diff] [blame] | 390 | loff_t size; |
Steven Whitehouse | 3cc3f71 | 2007-10-15 15:40:33 +0100 | [diff] [blame] | 391 | int ret; |
| 392 | |
Jan Kara | 39263d5e | 2012-06-12 16:20:41 +0200 | [diff] [blame] | 393 | sb_start_pagefault(inode->i_sb); |
Steven Whitehouse | 13d921e | 2011-09-07 15:12:51 +0100 | [diff] [blame] | 394 | |
Jan Kara | a63e9b2 | 2012-06-12 16:20:26 +0200 | [diff] [blame] | 395 | /* Update file times before taking page lock */ |
| 396 | file_update_time(vma->vm_file); |
Steven Whitehouse | 3cc3f71 | 2007-10-15 15:40:33 +0100 | [diff] [blame] | 397 | |
Bob Peterson | 2b3dcf3 | 2013-05-28 10:04:44 -0400 | [diff] [blame] | 398 | ret = get_write_access(inode); |
| 399 | if (ret) |
| 400 | goto out; |
| 401 | |
Bob Peterson | 0a305e4 | 2012-06-06 11:17:59 +0100 | [diff] [blame] | 402 | ret = gfs2_rs_alloc(ip); |
| 403 | if (ret) |
Bob Peterson | 2b3dcf3 | 2013-05-28 10:04:44 -0400 | [diff] [blame] | 404 | goto out_write_access; |
Bob Peterson | 0a305e4 | 2012-06-06 11:17:59 +0100 | [diff] [blame] | 405 | |
Steven Whitehouse | da1dfb6 | 2012-07-26 11:30:54 +0100 | [diff] [blame] | 406 | gfs2_size_hint(vma->vm_file, pos, PAGE_CACHE_SIZE); |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 407 | |
Steven Whitehouse | 719ee34 | 2008-09-18 13:53:59 +0100 | [diff] [blame] | 408 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); |
| 409 | ret = gfs2_glock_nq(&gh); |
Steven Whitehouse | 3cc3f71 | 2007-10-15 15:40:33 +0100 | [diff] [blame] | 410 | if (ret) |
Bob Peterson | 2b3dcf3 | 2013-05-28 10:04:44 -0400 | [diff] [blame] | 411 | goto out_uninit; |
Steven Whitehouse | 3cc3f71 | 2007-10-15 15:40:33 +0100 | [diff] [blame] | 412 | |
Steven Whitehouse | 9c53883 | 2009-03-19 13:15:44 +0000 | [diff] [blame] | 413 | set_bit(GLF_DIRTY, &ip->i_gl->gl_flags); |
| 414 | set_bit(GIF_SW_PAGED, &ip->i_flags); |
| 415 | |
Steven Whitehouse | 13d921e | 2011-09-07 15:12:51 +0100 | [diff] [blame] | 416 | if (!gfs2_write_alloc_required(ip, pos, PAGE_CACHE_SIZE)) { |
| 417 | lock_page(page); |
| 418 | if (!PageUptodate(page) || page->mapping != inode->i_mapping) { |
| 419 | ret = -EAGAIN; |
| 420 | unlock_page(page); |
| 421 | } |
Steven Whitehouse | 3cc3f71 | 2007-10-15 15:40:33 +0100 | [diff] [blame] | 422 | goto out_unlock; |
Steven Whitehouse | 13d921e | 2011-09-07 15:12:51 +0100 | [diff] [blame] | 423 | } |
| 424 | |
Bob Peterson | 5407e24 | 2012-05-18 09:28:23 -0400 | [diff] [blame] | 425 | ret = gfs2_rindex_update(sdp); |
| 426 | if (ret) |
Steven Whitehouse | 6dbd822 | 2008-01-10 15:18:55 +0000 | [diff] [blame] | 427 | goto out_unlock; |
| 428 | |
Steven Whitehouse | d82661d | 2008-03-10 15:34:50 +0000 | [diff] [blame] | 429 | ret = gfs2_quota_lock_check(ip); |
Steven Whitehouse | 3cc3f71 | 2007-10-15 15:40:33 +0100 | [diff] [blame] | 430 | if (ret) |
Bob Peterson | 5407e24 | 2012-05-18 09:28:23 -0400 | [diff] [blame] | 431 | goto out_unlock; |
Steven Whitehouse | 7ed122e | 2008-12-10 10:28:10 +0000 | [diff] [blame] | 432 | gfs2_write_calc_reserv(ip, PAGE_CACHE_SIZE, &data_blocks, &ind_blocks); |
Steven Whitehouse | 9dbe961 | 2012-10-31 10:37:10 +0000 | [diff] [blame] | 433 | ret = gfs2_inplace_reserve(ip, data_blocks + ind_blocks, 0); |
Steven Whitehouse | 3cc3f71 | 2007-10-15 15:40:33 +0100 | [diff] [blame] | 434 | 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 Marzinski | bf97b67 | 2010-09-27 16:00:04 -0500 | [diff] [blame] | 440 | if (ind_blocks || data_blocks) { |
Steven Whitehouse | 3cc3f71 | 2007-10-15 15:40:33 +0100 | [diff] [blame] | 441 | rblocks += RES_STATFS + RES_QUOTA; |
Steven Whitehouse | 71f890f | 2012-07-30 14:53:19 +0100 | [diff] [blame] | 442 | rblocks += gfs2_rg_blocks(ip, data_blocks + ind_blocks); |
Benjamin Marzinski | bf97b67 | 2010-09-27 16:00:04 -0500 | [diff] [blame] | 443 | } |
Steven Whitehouse | 3cc3f71 | 2007-10-15 15:40:33 +0100 | [diff] [blame] | 444 | ret = gfs2_trans_begin(sdp, rblocks, 0); |
| 445 | if (ret) |
| 446 | goto out_trans_fail; |
| 447 | |
| 448 | lock_page(page); |
| 449 | ret = -EINVAL; |
Steven Whitehouse | 13d921e | 2011-09-07 15:12:51 +0100 | [diff] [blame] | 450 | size = i_size_read(inode); |
| 451 | last_index = (size - 1) >> PAGE_CACHE_SHIFT; |
| 452 | /* Check page index against inode size */ |
| 453 | if (size == 0 || (page->index > last_index)) |
| 454 | goto out_trans_end; |
Steven Whitehouse | 3cc3f71 | 2007-10-15 15:40:33 +0100 | [diff] [blame] | 455 | |
Steven Whitehouse | 13d921e | 2011-09-07 15:12:51 +0100 | [diff] [blame] | 456 | 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 | |
| 470 | out_trans_end: |
| 471 | if (ret) |
| 472 | unlock_page(page); |
Steven Whitehouse | 3cc3f71 | 2007-10-15 15:40:33 +0100 | [diff] [blame] | 473 | gfs2_trans_end(sdp); |
| 474 | out_trans_fail: |
| 475 | gfs2_inplace_release(ip); |
| 476 | out_quota_unlock: |
| 477 | gfs2_quota_unlock(ip); |
Steven Whitehouse | 3cc3f71 | 2007-10-15 15:40:33 +0100 | [diff] [blame] | 478 | out_unlock: |
| 479 | gfs2_glock_dq(&gh); |
Bob Peterson | 2b3dcf3 | 2013-05-28 10:04:44 -0400 | [diff] [blame] | 480 | out_uninit: |
Steven Whitehouse | 3cc3f71 | 2007-10-15 15:40:33 +0100 | [diff] [blame] | 481 | gfs2_holder_uninit(&gh); |
Steven Whitehouse | 13d921e | 2011-09-07 15:12:51 +0100 | [diff] [blame] | 482 | if (ret == 0) { |
| 483 | set_page_dirty(page); |
Darrick J. Wong | 1d1d1a7 | 2013-02-21 16:42:51 -0800 | [diff] [blame] | 484 | wait_for_stable_page(page); |
Steven Whitehouse | 13d921e | 2011-09-07 15:12:51 +0100 | [diff] [blame] | 485 | } |
Bob Peterson | 2b3dcf3 | 2013-05-28 10:04:44 -0400 | [diff] [blame] | 486 | out_write_access: |
| 487 | put_write_access(inode); |
| 488 | out: |
Jan Kara | 39263d5e | 2012-06-12 16:20:41 +0200 | [diff] [blame] | 489 | sb_end_pagefault(inode->i_sb); |
Steven Whitehouse | 13d921e | 2011-09-07 15:12:51 +0100 | [diff] [blame] | 490 | return block_page_mkwrite_return(ret); |
Steven Whitehouse | 3cc3f71 | 2007-10-15 15:40:33 +0100 | [diff] [blame] | 491 | } |
| 492 | |
Alexey Dobriyan | f0f37e2 | 2009-09-27 22:29:37 +0400 | [diff] [blame] | 493 | static const struct vm_operations_struct gfs2_vm_ops = { |
Steven Whitehouse | 3cc3f71 | 2007-10-15 15:40:33 +0100 | [diff] [blame] | 494 | .fault = filemap_fault, |
| 495 | .page_mkwrite = gfs2_page_mkwrite, |
Konstantin Khlebnikov | 0b173bc | 2012-10-08 16:28:46 -0700 | [diff] [blame] | 496 | .remap_pages = generic_file_remap_pages, |
Steven Whitehouse | 3cc3f71 | 2007-10-15 15:40:33 +0100 | [diff] [blame] | 497 | }; |
| 498 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 499 | /** |
| 500 | * gfs2_mmap - |
| 501 | * @file: The file to map |
| 502 | * @vma: The VMA which described the mapping |
| 503 | * |
Steven Whitehouse | 48bf2b1 | 2009-04-29 13:59:35 +0100 | [diff] [blame] | 504 | * There is no need to get a lock here unless we should be updating |
| 505 | * atime. We ignore any locking errors since the only consequence is |
| 506 | * a missed atime update (which will just be deferred until later). |
| 507 | * |
| 508 | * Returns: 0 |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 509 | */ |
| 510 | |
| 511 | static int gfs2_mmap(struct file *file, struct vm_area_struct *vma) |
| 512 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 513 | struct gfs2_inode *ip = GFS2_I(file->f_mapping->host); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 514 | |
Steven Whitehouse | b9c93bb | 2011-02-02 14:48:10 +0000 | [diff] [blame] | 515 | if (!(file->f_flags & O_NOATIME) && |
| 516 | !IS_NOATIME(&ip->i_inode)) { |
Steven Whitehouse | 48bf2b1 | 2009-04-29 13:59:35 +0100 | [diff] [blame] | 517 | struct gfs2_holder i_gh; |
| 518 | int error; |
| 519 | |
Benjamin Marzinski | 3d16268 | 2012-11-06 00:49:28 -0600 | [diff] [blame] | 520 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, |
| 521 | &i_gh); |
Steven Whitehouse | b9c93bb | 2011-02-02 14:48:10 +0000 | [diff] [blame] | 522 | if (error) |
| 523 | return error; |
Benjamin Marzinski | 3d16268 | 2012-11-06 00:49:28 -0600 | [diff] [blame] | 524 | /* grab lock to update inode */ |
| 525 | gfs2_glock_dq_uninit(&i_gh); |
| 526 | file_accessed(file); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 527 | } |
Steven Whitehouse | 3cc3f71 | 2007-10-15 15:40:33 +0100 | [diff] [blame] | 528 | vma->vm_ops = &gfs2_vm_ops; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 529 | |
Steven Whitehouse | 48bf2b1 | 2009-04-29 13:59:35 +0100 | [diff] [blame] | 530 | return 0; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 531 | } |
| 532 | |
| 533 | /** |
| 534 | * gfs2_open - open a file |
| 535 | * @inode: the inode to open |
| 536 | * @file: the struct file for this opening |
| 537 | * |
| 538 | * Returns: errno |
| 539 | */ |
| 540 | |
| 541 | static int gfs2_open(struct inode *inode, struct file *file) |
| 542 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 543 | struct gfs2_inode *ip = GFS2_I(inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 544 | struct gfs2_holder i_gh; |
| 545 | struct gfs2_file *fp; |
| 546 | int error; |
| 547 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 548 | fp = kzalloc(sizeof(struct gfs2_file), GFP_KERNEL); |
| 549 | if (!fp) |
| 550 | return -ENOMEM; |
| 551 | |
Steven Whitehouse | f55ab26 | 2006-02-21 12:51:39 +0000 | [diff] [blame] | 552 | mutex_init(&fp->f_fl_mutex); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 553 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 554 | gfs2_assert_warn(GFS2_SB(inode), !file->private_data); |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 555 | file->private_data = fp; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 556 | |
Steven Whitehouse | b60623c | 2006-11-01 12:22:46 -0500 | [diff] [blame] | 557 | if (S_ISREG(ip->i_inode.i_mode)) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 558 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, |
| 559 | &i_gh); |
| 560 | if (error) |
| 561 | goto fail; |
| 562 | |
| 563 | if (!(file->f_flags & O_LARGEFILE) && |
Steven Whitehouse | a2e0f79 | 2010-08-11 09:53:11 +0100 | [diff] [blame] | 564 | i_size_read(inode) > MAX_NON_LFS) { |
Alan Cox | a9c62a1 | 2007-10-16 23:30:22 -0700 | [diff] [blame] | 565 | error = -EOVERFLOW; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 566 | goto fail_gunlock; |
| 567 | } |
| 568 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 569 | gfs2_glock_dq_uninit(&i_gh); |
| 570 | } |
| 571 | |
| 572 | return 0; |
| 573 | |
Steven Whitehouse | 420b9e5 | 2006-07-31 15:42:17 -0400 | [diff] [blame] | 574 | fail_gunlock: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 575 | gfs2_glock_dq_uninit(&i_gh); |
Steven Whitehouse | 420b9e5 | 2006-07-31 15:42:17 -0400 | [diff] [blame] | 576 | fail: |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 577 | file->private_data = NULL; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 578 | kfree(fp); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 579 | return error; |
| 580 | } |
| 581 | |
| 582 | /** |
Bob Peterson | df3fd11 | 2012-04-11 12:56:41 -0400 | [diff] [blame] | 583 | * gfs2_release - called to close a struct file |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 584 | * @inode: the inode the struct file belongs to |
| 585 | * @file: the struct file being closed |
| 586 | * |
| 587 | * Returns: errno |
| 588 | */ |
| 589 | |
Bob Peterson | df3fd11 | 2012-04-11 12:56:41 -0400 | [diff] [blame] | 590 | static int gfs2_release(struct inode *inode, struct file *file) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 591 | { |
Bob Peterson | 0a305e4 | 2012-06-06 11:17:59 +0100 | [diff] [blame] | 592 | struct gfs2_inode *ip = GFS2_I(inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 593 | |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 594 | kfree(file->private_data); |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 595 | file->private_data = NULL; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 596 | |
Bob Peterson | 2b3dcf3 | 2013-05-28 10:04:44 -0400 | [diff] [blame] | 597 | if (!(file->f_mode & FMODE_WRITE)) |
| 598 | return 0; |
Bob Peterson | 0a305e4 | 2012-06-06 11:17:59 +0100 | [diff] [blame] | 599 | |
Bob Peterson | 2b3dcf3 | 2013-05-28 10:04:44 -0400 | [diff] [blame] | 600 | gfs2_rs_delete(ip); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 601 | return 0; |
| 602 | } |
| 603 | |
| 604 | /** |
| 605 | * gfs2_fsync - sync the dirty data for a file (across the cluster) |
Josef Bacik | 02c24a8 | 2011-07-16 20:44:56 -0400 | [diff] [blame] | 606 | * @file: the file that points to the dentry |
| 607 | * @start: the start position in the file to sync |
| 608 | * @end: the end position in the file to sync |
Steven Whitehouse | dba898b | 2011-04-14 09:54:02 +0100 | [diff] [blame] | 609 | * @datasync: set if we can ignore timestamp changes |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 610 | * |
Steven Whitehouse | 2f0264d | 2011-07-27 10:58:48 +0100 | [diff] [blame] | 611 | * We split the data flushing here so that we don't wait for the data |
| 612 | * until after we've also sent the metadata to disk. Note that for |
| 613 | * data=ordered, we will write & wait for the data at the log flush |
| 614 | * stage anyway, so this is unlikely to make much of a difference |
| 615 | * except in the data=writeback case. |
| 616 | * |
| 617 | * If the fdatawrite fails due to any reason except -EIO, we will |
| 618 | * continue the remainder of the fsync, although we'll still report |
| 619 | * the error at the end. This is to match filemap_write_and_wait_range() |
| 620 | * behaviour. |
Steven Whitehouse | 34126f9 | 2006-12-07 09:13:14 -0500 | [diff] [blame] | 621 | * |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 622 | * Returns: errno |
| 623 | */ |
| 624 | |
Josef Bacik | 02c24a8 | 2011-07-16 20:44:56 -0400 | [diff] [blame] | 625 | static int gfs2_fsync(struct file *file, loff_t start, loff_t end, |
| 626 | int datasync) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 627 | { |
Steven Whitehouse | 2f0264d | 2011-07-27 10:58:48 +0100 | [diff] [blame] | 628 | struct address_space *mapping = file->f_mapping; |
| 629 | struct inode *inode = mapping->host; |
Steven Whitehouse | 33c3de3 | 2006-11-30 10:14:32 -0500 | [diff] [blame] | 630 | int sync_state = inode->i_state & (I_DIRTY_SYNC|I_DIRTY_DATASYNC); |
Steven Whitehouse | dba898b | 2011-04-14 09:54:02 +0100 | [diff] [blame] | 631 | struct gfs2_inode *ip = GFS2_I(inode); |
Steven Whitehouse | 8765489 | 2011-11-08 14:04:20 +0000 | [diff] [blame] | 632 | int ret = 0, ret1 = 0; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 633 | |
Steven Whitehouse | 2f0264d | 2011-07-27 10:58:48 +0100 | [diff] [blame] | 634 | if (mapping->nrpages) { |
| 635 | ret1 = filemap_fdatawrite_range(mapping, start, end); |
| 636 | if (ret1 == -EIO) |
| 637 | return ret1; |
| 638 | } |
Josef Bacik | 02c24a8 | 2011-07-16 20:44:56 -0400 | [diff] [blame] | 639 | |
Steven Whitehouse | dba898b | 2011-04-14 09:54:02 +0100 | [diff] [blame] | 640 | if (datasync) |
| 641 | sync_state &= ~I_DIRTY_SYNC; |
| 642 | |
| 643 | if (sync_state) { |
| 644 | ret = sync_inode_metadata(inode, 1); |
Steven Whitehouse | b5b24d7 | 2011-09-07 10:33:25 +0100 | [diff] [blame] | 645 | if (ret) |
Steven Whitehouse | dba898b | 2011-04-14 09:54:02 +0100 | [diff] [blame] | 646 | return ret; |
Steven Whitehouse | f181852 | 2011-08-05 10:12:47 +0100 | [diff] [blame] | 647 | if (gfs2_is_jdata(ip)) |
| 648 | filemap_write_and_wait(mapping); |
Steven Whitehouse | b5b24d7 | 2011-09-07 10:33:25 +0100 | [diff] [blame] | 649 | gfs2_ail_flush(ip->i_gl, 1); |
Steven Whitehouse | 33c3de3 | 2006-11-30 10:14:32 -0500 | [diff] [blame] | 650 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 651 | |
Steven Whitehouse | 2f0264d | 2011-07-27 10:58:48 +0100 | [diff] [blame] | 652 | if (mapping->nrpages) |
| 653 | ret = filemap_fdatawait_range(mapping, start, end); |
| 654 | |
| 655 | return ret ? ret : ret1; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 656 | } |
| 657 | |
Steven Whitehouse | 56aa616 | 2009-12-08 10:25:33 +0000 | [diff] [blame] | 658 | /** |
| 659 | * gfs2_file_aio_write - Perform a write to a file |
| 660 | * @iocb: The io context |
| 661 | * @iov: The data to write |
| 662 | * @nr_segs: Number of @iov segments |
| 663 | * @pos: The file position |
| 664 | * |
| 665 | * We have to do a lock/unlock here to refresh the inode size for |
| 666 | * O_APPEND writes, otherwise we can land up writing at the wrong |
| 667 | * offset. There is still a race, but provided the app is using its |
| 668 | * own file locking, this will make O_APPEND work as expected. |
| 669 | * |
| 670 | */ |
| 671 | |
| 672 | static ssize_t gfs2_file_aio_write(struct kiocb *iocb, const struct iovec *iov, |
| 673 | unsigned long nr_segs, loff_t pos) |
| 674 | { |
| 675 | struct file *file = iocb->ki_filp; |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 676 | size_t writesize = iov_length(iov, nr_segs); |
Al Viro | 496ad9a | 2013-01-23 17:07:38 -0500 | [diff] [blame] | 677 | struct gfs2_inode *ip = GFS2_I(file_inode(file)); |
Bob Peterson | 0a305e4 | 2012-06-06 11:17:59 +0100 | [diff] [blame] | 678 | int ret; |
| 679 | |
| 680 | ret = gfs2_rs_alloc(ip); |
| 681 | if (ret) |
| 682 | return ret; |
Steven Whitehouse | 56aa616 | 2009-12-08 10:25:33 +0000 | [diff] [blame] | 683 | |
Steven Whitehouse | da1dfb6 | 2012-07-26 11:30:54 +0100 | [diff] [blame] | 684 | gfs2_size_hint(file, pos, writesize); |
| 685 | |
Steven Whitehouse | 56aa616 | 2009-12-08 10:25:33 +0000 | [diff] [blame] | 686 | if (file->f_flags & O_APPEND) { |
Steven Whitehouse | 56aa616 | 2009-12-08 10:25:33 +0000 | [diff] [blame] | 687 | struct gfs2_holder gh; |
Steven Whitehouse | 56aa616 | 2009-12-08 10:25:33 +0000 | [diff] [blame] | 688 | |
| 689 | ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); |
| 690 | if (ret) |
| 691 | return ret; |
| 692 | gfs2_glock_dq_uninit(&gh); |
| 693 | } |
| 694 | |
| 695 | return generic_file_aio_write(iocb, iov, nr_segs, pos); |
| 696 | } |
| 697 | |
Christoph Hellwig | 2fe17c1 | 2011-01-14 13:07:43 +0100 | [diff] [blame] | 698 | static int fallocate_chunk(struct inode *inode, loff_t offset, loff_t len, |
| 699 | int mode) |
| 700 | { |
| 701 | struct gfs2_inode *ip = GFS2_I(inode); |
| 702 | struct buffer_head *dibh; |
| 703 | int error; |
Benjamin Marzinski | 58a7d5f | 2012-03-08 13:16:32 -0600 | [diff] [blame] | 704 | loff_t size = len; |
Benjamin Marzinski | 64dd153 | 2011-09-12 18:15:24 -0500 | [diff] [blame] | 705 | unsigned int nr_blks; |
| 706 | sector_t lblock = offset >> inode->i_blkbits; |
Christoph Hellwig | 2fe17c1 | 2011-01-14 13:07:43 +0100 | [diff] [blame] | 707 | |
| 708 | error = gfs2_meta_inode_buffer(ip, &dibh); |
| 709 | if (unlikely(error)) |
Benjamin Marzinski | 64dd153 | 2011-09-12 18:15:24 -0500 | [diff] [blame] | 710 | return error; |
Christoph Hellwig | 2fe17c1 | 2011-01-14 13:07:43 +0100 | [diff] [blame] | 711 | |
Steven Whitehouse | 350a9b0 | 2012-12-14 12:36:02 +0000 | [diff] [blame] | 712 | gfs2_trans_add_meta(ip->i_gl, dibh); |
Christoph Hellwig | 2fe17c1 | 2011-01-14 13:07:43 +0100 | [diff] [blame] | 713 | |
| 714 | if (gfs2_is_stuffed(ip)) { |
| 715 | error = gfs2_unstuff_dinode(ip, NULL); |
| 716 | if (unlikely(error)) |
| 717 | goto out; |
| 718 | } |
| 719 | |
Benjamin Marzinski | 64dd153 | 2011-09-12 18:15:24 -0500 | [diff] [blame] | 720 | while (len) { |
| 721 | struct buffer_head bh_map = { .b_state = 0, .b_blocknr = 0 }; |
| 722 | bh_map.b_size = len; |
| 723 | set_buffer_zeronew(&bh_map); |
Christoph Hellwig | 2fe17c1 | 2011-01-14 13:07:43 +0100 | [diff] [blame] | 724 | |
Benjamin Marzinski | 64dd153 | 2011-09-12 18:15:24 -0500 | [diff] [blame] | 725 | error = gfs2_block_map(inode, lblock, &bh_map, 1); |
| 726 | if (unlikely(error)) |
Christoph Hellwig | 2fe17c1 | 2011-01-14 13:07:43 +0100 | [diff] [blame] | 727 | goto out; |
Benjamin Marzinski | 64dd153 | 2011-09-12 18:15:24 -0500 | [diff] [blame] | 728 | len -= bh_map.b_size; |
| 729 | nr_blks = bh_map.b_size >> inode->i_blkbits; |
| 730 | lblock += nr_blks; |
| 731 | if (!buffer_new(&bh_map)) |
| 732 | continue; |
| 733 | if (unlikely(!buffer_zeronew(&bh_map))) { |
| 734 | error = -EIO; |
| 735 | goto out; |
| 736 | } |
Christoph Hellwig | 2fe17c1 | 2011-01-14 13:07:43 +0100 | [diff] [blame] | 737 | } |
Benjamin Marzinski | 58a7d5f | 2012-03-08 13:16:32 -0600 | [diff] [blame] | 738 | if (offset + size > inode->i_size && !(mode & FALLOC_FL_KEEP_SIZE)) |
| 739 | i_size_write(inode, offset + size); |
Christoph Hellwig | 2fe17c1 | 2011-01-14 13:07:43 +0100 | [diff] [blame] | 740 | |
Christoph Hellwig | 2fe17c1 | 2011-01-14 13:07:43 +0100 | [diff] [blame] | 741 | mark_inode_dirty(inode); |
| 742 | |
Christoph Hellwig | 2fe17c1 | 2011-01-14 13:07:43 +0100 | [diff] [blame] | 743 | out: |
Benjamin Marzinski | 64dd153 | 2011-09-12 18:15:24 -0500 | [diff] [blame] | 744 | brelse(dibh); |
Christoph Hellwig | 2fe17c1 | 2011-01-14 13:07:43 +0100 | [diff] [blame] | 745 | return error; |
| 746 | } |
| 747 | |
| 748 | static void calc_max_reserv(struct gfs2_inode *ip, loff_t max, loff_t *len, |
| 749 | unsigned int *data_blocks, unsigned int *ind_blocks) |
| 750 | { |
| 751 | const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
Steven Whitehouse | 54335b1 | 2011-09-01 13:31:59 +0100 | [diff] [blame] | 752 | unsigned int max_blocks = ip->i_rgd->rd_free_clone; |
Christoph Hellwig | 2fe17c1 | 2011-01-14 13:07:43 +0100 | [diff] [blame] | 753 | unsigned int tmp, max_data = max_blocks - 3 * (sdp->sd_max_height - 1); |
| 754 | |
| 755 | for (tmp = max_data; tmp > sdp->sd_diptrs;) { |
| 756 | tmp = DIV_ROUND_UP(tmp, sdp->sd_inptrs); |
| 757 | max_data -= tmp; |
| 758 | } |
| 759 | /* This calculation isn't the exact reverse of gfs2_write_calc_reserve, |
| 760 | so it might end up with fewer data blocks */ |
| 761 | if (max_data <= *data_blocks) |
| 762 | return; |
| 763 | *data_blocks = max_data; |
| 764 | *ind_blocks = max_blocks - max_data; |
| 765 | *len = ((loff_t)max_data - 3) << sdp->sd_sb.sb_bsize_shift; |
| 766 | if (*len > max) { |
| 767 | *len = max; |
| 768 | gfs2_write_calc_reserv(ip, max, data_blocks, ind_blocks); |
| 769 | } |
| 770 | } |
| 771 | |
| 772 | static long gfs2_fallocate(struct file *file, int mode, loff_t offset, |
| 773 | loff_t len) |
| 774 | { |
Al Viro | 496ad9a | 2013-01-23 17:07:38 -0500 | [diff] [blame] | 775 | struct inode *inode = file_inode(file); |
Christoph Hellwig | 2fe17c1 | 2011-01-14 13:07:43 +0100 | [diff] [blame] | 776 | struct gfs2_sbd *sdp = GFS2_SB(inode); |
| 777 | struct gfs2_inode *ip = GFS2_I(inode); |
| 778 | unsigned int data_blocks = 0, ind_blocks = 0, rblocks; |
| 779 | loff_t bytes, max_bytes; |
Christoph Hellwig | 2fe17c1 | 2011-01-14 13:07:43 +0100 | [diff] [blame] | 780 | int error; |
Steven Whitehouse | 4442f2e | 2011-11-21 10:01:25 +0000 | [diff] [blame] | 781 | const loff_t pos = offset; |
| 782 | const loff_t count = len; |
Benjamin Marzinski | 6905d9e | 2011-04-26 01:13:24 -0500 | [diff] [blame] | 783 | loff_t bsize_mask = ~((loff_t)sdp->sd_sb.sb_bsize - 1); |
Christoph Hellwig | 2fe17c1 | 2011-01-14 13:07:43 +0100 | [diff] [blame] | 784 | loff_t next = (offset + len - 1) >> sdp->sd_sb.sb_bsize_shift; |
Benjamin Marzinski | 64dd153 | 2011-09-12 18:15:24 -0500 | [diff] [blame] | 785 | loff_t max_chunk_size = UINT_MAX & bsize_mask; |
Christoph Hellwig | 2fe17c1 | 2011-01-14 13:07:43 +0100 | [diff] [blame] | 786 | next = (next + 1) << sdp->sd_sb.sb_bsize_shift; |
| 787 | |
| 788 | /* We only support the FALLOC_FL_KEEP_SIZE mode */ |
| 789 | if (mode & ~FALLOC_FL_KEEP_SIZE) |
| 790 | return -EOPNOTSUPP; |
| 791 | |
Benjamin Marzinski | 6905d9e | 2011-04-26 01:13:24 -0500 | [diff] [blame] | 792 | offset &= bsize_mask; |
Christoph Hellwig | 2fe17c1 | 2011-01-14 13:07:43 +0100 | [diff] [blame] | 793 | |
| 794 | len = next - offset; |
| 795 | bytes = sdp->sd_max_rg_data * sdp->sd_sb.sb_bsize / 2; |
| 796 | if (!bytes) |
| 797 | bytes = UINT_MAX; |
Benjamin Marzinski | 6905d9e | 2011-04-26 01:13:24 -0500 | [diff] [blame] | 798 | bytes &= bsize_mask; |
| 799 | if (bytes == 0) |
| 800 | bytes = sdp->sd_sb.sb_bsize; |
Christoph Hellwig | 2fe17c1 | 2011-01-14 13:07:43 +0100 | [diff] [blame] | 801 | |
Bob Peterson | 0a305e4 | 2012-06-06 11:17:59 +0100 | [diff] [blame] | 802 | error = gfs2_rs_alloc(ip); |
| 803 | if (error) |
| 804 | return error; |
| 805 | |
Christoph Hellwig | 2fe17c1 | 2011-01-14 13:07:43 +0100 | [diff] [blame] | 806 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &ip->i_gh); |
| 807 | error = gfs2_glock_nq(&ip->i_gh); |
| 808 | if (unlikely(error)) |
| 809 | goto out_uninit; |
| 810 | |
Steven Whitehouse | da1dfb6 | 2012-07-26 11:30:54 +0100 | [diff] [blame] | 811 | gfs2_size_hint(file, offset, len); |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 812 | |
Christoph Hellwig | 2fe17c1 | 2011-01-14 13:07:43 +0100 | [diff] [blame] | 813 | while (len > 0) { |
| 814 | if (len < bytes) |
| 815 | bytes = len; |
Benjamin Marzinski | 58a7d5f | 2012-03-08 13:16:32 -0600 | [diff] [blame] | 816 | if (!gfs2_write_alloc_required(ip, offset, bytes)) { |
| 817 | len -= bytes; |
| 818 | offset += bytes; |
| 819 | continue; |
| 820 | } |
Christoph Hellwig | 2fe17c1 | 2011-01-14 13:07:43 +0100 | [diff] [blame] | 821 | error = gfs2_quota_lock_check(ip); |
| 822 | if (error) |
Bob Peterson | 5407e24 | 2012-05-18 09:28:23 -0400 | [diff] [blame] | 823 | goto out_unlock; |
Christoph Hellwig | 2fe17c1 | 2011-01-14 13:07:43 +0100 | [diff] [blame] | 824 | |
| 825 | retry: |
| 826 | gfs2_write_calc_reserv(ip, bytes, &data_blocks, &ind_blocks); |
| 827 | |
Steven Whitehouse | 9dbe961 | 2012-10-31 10:37:10 +0000 | [diff] [blame] | 828 | error = gfs2_inplace_reserve(ip, data_blocks + ind_blocks, 0); |
Christoph Hellwig | 2fe17c1 | 2011-01-14 13:07:43 +0100 | [diff] [blame] | 829 | if (error) { |
| 830 | if (error == -ENOSPC && bytes > sdp->sd_sb.sb_bsize) { |
| 831 | bytes >>= 1; |
Benjamin Marzinski | 6905d9e | 2011-04-26 01:13:24 -0500 | [diff] [blame] | 832 | bytes &= bsize_mask; |
| 833 | if (bytes == 0) |
| 834 | bytes = sdp->sd_sb.sb_bsize; |
Christoph Hellwig | 2fe17c1 | 2011-01-14 13:07:43 +0100 | [diff] [blame] | 835 | goto retry; |
| 836 | } |
| 837 | goto out_qunlock; |
| 838 | } |
| 839 | max_bytes = bytes; |
Benjamin Marzinski | 64dd153 | 2011-09-12 18:15:24 -0500 | [diff] [blame] | 840 | calc_max_reserv(ip, (len > max_chunk_size)? max_chunk_size: len, |
| 841 | &max_bytes, &data_blocks, &ind_blocks); |
Christoph Hellwig | 2fe17c1 | 2011-01-14 13:07:43 +0100 | [diff] [blame] | 842 | |
| 843 | rblocks = RES_DINODE + ind_blocks + RES_STATFS + RES_QUOTA + |
Steven Whitehouse | 71f890f | 2012-07-30 14:53:19 +0100 | [diff] [blame] | 844 | RES_RG_HDR + gfs2_rg_blocks(ip, data_blocks + ind_blocks); |
Christoph Hellwig | 2fe17c1 | 2011-01-14 13:07:43 +0100 | [diff] [blame] | 845 | if (gfs2_is_jdata(ip)) |
| 846 | rblocks += data_blocks ? data_blocks : 1; |
| 847 | |
| 848 | error = gfs2_trans_begin(sdp, rblocks, |
| 849 | PAGE_CACHE_SIZE/sdp->sd_sb.sb_bsize); |
| 850 | if (error) |
| 851 | goto out_trans_fail; |
| 852 | |
| 853 | error = fallocate_chunk(inode, offset, max_bytes, mode); |
| 854 | gfs2_trans_end(sdp); |
| 855 | |
| 856 | if (error) |
| 857 | goto out_trans_fail; |
| 858 | |
| 859 | len -= max_bytes; |
| 860 | offset += max_bytes; |
| 861 | gfs2_inplace_release(ip); |
| 862 | gfs2_quota_unlock(ip); |
Christoph Hellwig | 2fe17c1 | 2011-01-14 13:07:43 +0100 | [diff] [blame] | 863 | } |
Steven Whitehouse | 4442f2e | 2011-11-21 10:01:25 +0000 | [diff] [blame] | 864 | |
| 865 | if (error == 0) |
| 866 | error = generic_write_sync(file, pos, count); |
Christoph Hellwig | 2fe17c1 | 2011-01-14 13:07:43 +0100 | [diff] [blame] | 867 | goto out_unlock; |
| 868 | |
| 869 | out_trans_fail: |
| 870 | gfs2_inplace_release(ip); |
| 871 | out_qunlock: |
| 872 | gfs2_quota_unlock(ip); |
Christoph Hellwig | 2fe17c1 | 2011-01-14 13:07:43 +0100 | [diff] [blame] | 873 | out_unlock: |
| 874 | gfs2_glock_dq(&ip->i_gh); |
| 875 | out_uninit: |
| 876 | gfs2_holder_uninit(&ip->i_gh); |
| 877 | return error; |
| 878 | } |
| 879 | |
Steven Whitehouse | f057f6c | 2009-01-12 10:43:39 +0000 | [diff] [blame] | 880 | #ifdef CONFIG_GFS2_FS_LOCKING_DLM |
| 881 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 882 | /** |
Marc Eshel | 6044606 | 2007-01-15 18:33:36 -0500 | [diff] [blame] | 883 | * gfs2_setlease - acquire/release a file lease |
| 884 | * @file: the file pointer |
| 885 | * @arg: lease type |
| 886 | * @fl: file lock |
| 887 | * |
Steven Whitehouse | f057f6c | 2009-01-12 10:43:39 +0000 | [diff] [blame] | 888 | * We don't currently have a way to enforce a lease across the whole |
| 889 | * cluster; until we do, disable leases (by just returning -EINVAL), |
| 890 | * unless the administrator has requested purely local locking. |
| 891 | * |
Jeff Layton | 1c8c601 | 2013-06-21 08:58:15 -0400 | [diff] [blame^] | 892 | * Locking: called under i_lock |
Arnd Bergmann | b89f432 | 2010-09-18 15:09:31 +0200 | [diff] [blame] | 893 | * |
Marc Eshel | 6044606 | 2007-01-15 18:33:36 -0500 | [diff] [blame] | 894 | * Returns: errno |
| 895 | */ |
| 896 | |
| 897 | static int gfs2_setlease(struct file *file, long arg, struct file_lock **fl) |
| 898 | { |
Steven Whitehouse | f057f6c | 2009-01-12 10:43:39 +0000 | [diff] [blame] | 899 | return -EINVAL; |
Steven Whitehouse | da755fd | 2008-01-30 15:34:04 +0000 | [diff] [blame] | 900 | } |
| 901 | |
Marc Eshel | 6044606 | 2007-01-15 18:33:36 -0500 | [diff] [blame] | 902 | /** |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 903 | * gfs2_lock - acquire/release a posix lock on a file |
| 904 | * @file: the file pointer |
| 905 | * @cmd: either modify or retrieve lock state, possibly wait |
| 906 | * @fl: type and range of lock |
| 907 | * |
| 908 | * Returns: errno |
| 909 | */ |
| 910 | |
| 911 | static int gfs2_lock(struct file *file, int cmd, struct file_lock *fl) |
| 912 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 913 | struct gfs2_inode *ip = GFS2_I(file->f_mapping->host); |
| 914 | struct gfs2_sbd *sdp = GFS2_SB(file->f_mapping->host); |
Steven Whitehouse | f057f6c | 2009-01-12 10:43:39 +0000 | [diff] [blame] | 915 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 916 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 917 | if (!(fl->fl_flags & FL_POSIX)) |
| 918 | return -ENOLCK; |
Sachin Prabhu | 720e774 | 2010-03-11 12:24:45 -0500 | [diff] [blame] | 919 | if (__mandatory_lock(&ip->i_inode) && fl->fl_type != F_UNLCK) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 920 | return -ENOLCK; |
| 921 | |
Marc Eshel | 586759f | 2006-11-14 16:37:25 -0500 | [diff] [blame] | 922 | if (cmd == F_CANCELLK) { |
| 923 | /* Hack: */ |
| 924 | cmd = F_SETLK; |
| 925 | fl->fl_type = F_UNLCK; |
| 926 | } |
Steven Whitehouse | c2952d2 | 2013-03-14 15:49:59 +0000 | [diff] [blame] | 927 | if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags))) { |
| 928 | if (fl->fl_type == F_UNLCK) |
| 929 | posix_lock_file_wait(file, fl); |
Steven Whitehouse | f057f6c | 2009-01-12 10:43:39 +0000 | [diff] [blame] | 930 | return -EIO; |
Steven Whitehouse | c2952d2 | 2013-03-14 15:49:59 +0000 | [diff] [blame] | 931 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 932 | if (IS_GETLK(cmd)) |
Steven Whitehouse | f057f6c | 2009-01-12 10:43:39 +0000 | [diff] [blame] | 933 | return dlm_posix_get(ls->ls_dlm, ip->i_no_addr, file, fl); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 934 | else if (fl->fl_type == F_UNLCK) |
Steven Whitehouse | f057f6c | 2009-01-12 10:43:39 +0000 | [diff] [blame] | 935 | return dlm_posix_unlock(ls->ls_dlm, ip->i_no_addr, file, fl); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 936 | else |
Steven Whitehouse | f057f6c | 2009-01-12 10:43:39 +0000 | [diff] [blame] | 937 | return dlm_posix_lock(ls->ls_dlm, ip->i_no_addr, file, cmd, fl); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 938 | } |
| 939 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 940 | static int do_flock(struct file *file, int cmd, struct file_lock *fl) |
| 941 | { |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 942 | struct gfs2_file *fp = file->private_data; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 943 | struct gfs2_holder *fl_gh = &fp->f_fl_gh; |
Al Viro | 496ad9a | 2013-01-23 17:07:38 -0500 | [diff] [blame] | 944 | struct gfs2_inode *ip = GFS2_I(file_inode(file)); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 945 | struct gfs2_glock *gl; |
| 946 | unsigned int state; |
| 947 | int flags; |
| 948 | int error = 0; |
| 949 | |
| 950 | state = (fl->fl_type == F_WRLCK) ? LM_ST_EXCLUSIVE : LM_ST_SHARED; |
Steven Whitehouse | 6802e34 | 2008-05-21 17:03:22 +0100 | [diff] [blame] | 951 | flags = (IS_SETLKW(cmd) ? 0 : LM_FLAG_TRY) | GL_EXACT | GL_NOCACHE; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 952 | |
Steven Whitehouse | f55ab26 | 2006-02-21 12:51:39 +0000 | [diff] [blame] | 953 | mutex_lock(&fp->f_fl_mutex); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 954 | |
| 955 | gl = fl_gh->gh_gl; |
| 956 | if (gl) { |
| 957 | if (fl_gh->gh_state == state) |
| 958 | goto out; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 959 | flock_lock_file_wait(file, |
Steven Whitehouse | 907b9bc | 2006-09-25 09:26:04 -0400 | [diff] [blame] | 960 | &(struct file_lock){.fl_type = F_UNLCK}); |
Abhijith Das | b4c2016 | 2007-09-13 23:35:27 -0500 | [diff] [blame] | 961 | gfs2_glock_dq_wait(fl_gh); |
| 962 | gfs2_holder_reinit(state, flags, fl_gh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 963 | } else { |
Steven Whitehouse | 6802e34 | 2008-05-21 17:03:22 +0100 | [diff] [blame] | 964 | error = gfs2_glock_get(GFS2_SB(&ip->i_inode), ip->i_no_addr, |
| 965 | &gfs2_flock_glops, CREATE, &gl); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 966 | if (error) |
| 967 | goto out; |
Abhijith Das | b4c2016 | 2007-09-13 23:35:27 -0500 | [diff] [blame] | 968 | gfs2_holder_init(gl, state, flags, fl_gh); |
| 969 | gfs2_glock_put(gl); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 970 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 971 | error = gfs2_glock_nq(fl_gh); |
| 972 | if (error) { |
| 973 | gfs2_holder_uninit(fl_gh); |
| 974 | if (error == GLR_TRYFAILED) |
| 975 | error = -EAGAIN; |
| 976 | } else { |
| 977 | error = flock_lock_file_wait(file, fl); |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 978 | gfs2_assert_warn(GFS2_SB(&ip->i_inode), !error); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 979 | } |
| 980 | |
Steven Whitehouse | 420b9e5 | 2006-07-31 15:42:17 -0400 | [diff] [blame] | 981 | out: |
Steven Whitehouse | f55ab26 | 2006-02-21 12:51:39 +0000 | [diff] [blame] | 982 | mutex_unlock(&fp->f_fl_mutex); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 983 | return error; |
| 984 | } |
| 985 | |
| 986 | static void do_unflock(struct file *file, struct file_lock *fl) |
| 987 | { |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 988 | struct gfs2_file *fp = file->private_data; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 989 | struct gfs2_holder *fl_gh = &fp->f_fl_gh; |
| 990 | |
Steven Whitehouse | f55ab26 | 2006-02-21 12:51:39 +0000 | [diff] [blame] | 991 | mutex_lock(&fp->f_fl_mutex); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 992 | flock_lock_file_wait(file, fl); |
Steven Whitehouse | 0a33443 | 2011-03-09 11:14:32 +0000 | [diff] [blame] | 993 | if (fl_gh->gh_gl) { |
| 994 | gfs2_glock_dq_wait(fl_gh); |
| 995 | gfs2_holder_uninit(fl_gh); |
| 996 | } |
Steven Whitehouse | f55ab26 | 2006-02-21 12:51:39 +0000 | [diff] [blame] | 997 | mutex_unlock(&fp->f_fl_mutex); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 998 | } |
| 999 | |
| 1000 | /** |
| 1001 | * gfs2_flock - acquire/release a flock lock on a file |
| 1002 | * @file: the file pointer |
| 1003 | * @cmd: either modify or retrieve lock state, possibly wait |
| 1004 | * @fl: type and range of lock |
| 1005 | * |
| 1006 | * Returns: errno |
| 1007 | */ |
| 1008 | |
| 1009 | static int gfs2_flock(struct file *file, int cmd, struct file_lock *fl) |
| 1010 | { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1011 | if (!(fl->fl_flags & FL_FLOCK)) |
| 1012 | return -ENOLCK; |
Abhijith Das | a12af1e | 2009-06-01 12:30:03 -0500 | [diff] [blame] | 1013 | if (fl->fl_type & LOCK_MAND) |
| 1014 | return -EOPNOTSUPP; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1015 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1016 | if (fl->fl_type == F_UNLCK) { |
| 1017 | do_unflock(file, fl); |
| 1018 | return 0; |
Steven Whitehouse | d00223f | 2006-10-02 10:28:05 -0400 | [diff] [blame] | 1019 | } else { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1020 | return do_flock(file, cmd, fl); |
Steven Whitehouse | d00223f | 2006-10-02 10:28:05 -0400 | [diff] [blame] | 1021 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1022 | } |
| 1023 | |
Christoph Hellwig | 10d2198 | 2009-04-07 19:42:17 +0200 | [diff] [blame] | 1024 | const struct file_operations gfs2_file_fops = { |
Steven Whitehouse | 26c1a57 | 2006-09-04 15:32:10 -0400 | [diff] [blame] | 1025 | .llseek = gfs2_llseek, |
Steven Whitehouse | d00223f | 2006-10-02 10:28:05 -0400 | [diff] [blame] | 1026 | .read = do_sync_read, |
Steven Whitehouse | 26c1a57 | 2006-09-04 15:32:10 -0400 | [diff] [blame] | 1027 | .aio_read = generic_file_aio_read, |
Steven Whitehouse | d00223f | 2006-10-02 10:28:05 -0400 | [diff] [blame] | 1028 | .write = do_sync_write, |
Steven Whitehouse | 56aa616 | 2009-12-08 10:25:33 +0000 | [diff] [blame] | 1029 | .aio_write = gfs2_file_aio_write, |
Steven Whitehouse | 26c1a57 | 2006-09-04 15:32:10 -0400 | [diff] [blame] | 1030 | .unlocked_ioctl = gfs2_ioctl, |
| 1031 | .mmap = gfs2_mmap, |
| 1032 | .open = gfs2_open, |
Bob Peterson | df3fd11 | 2012-04-11 12:56:41 -0400 | [diff] [blame] | 1033 | .release = gfs2_release, |
Steven Whitehouse | 26c1a57 | 2006-09-04 15:32:10 -0400 | [diff] [blame] | 1034 | .fsync = gfs2_fsync, |
| 1035 | .lock = gfs2_lock, |
Steven Whitehouse | 26c1a57 | 2006-09-04 15:32:10 -0400 | [diff] [blame] | 1036 | .flock = gfs2_flock, |
| 1037 | .splice_read = generic_file_splice_read, |
| 1038 | .splice_write = generic_file_splice_write, |
Marc Eshel | 6044606 | 2007-01-15 18:33:36 -0500 | [diff] [blame] | 1039 | .setlease = gfs2_setlease, |
Christoph Hellwig | 2fe17c1 | 2011-01-14 13:07:43 +0100 | [diff] [blame] | 1040 | .fallocate = gfs2_fallocate, |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1041 | }; |
| 1042 | |
Christoph Hellwig | 10d2198 | 2009-04-07 19:42:17 +0200 | [diff] [blame] | 1043 | const struct file_operations gfs2_dir_fops = { |
Al Viro | d81a8ef | 2013-05-16 14:14:48 -0400 | [diff] [blame] | 1044 | .iterate = gfs2_readdir, |
Steven Whitehouse | 26c1a57 | 2006-09-04 15:32:10 -0400 | [diff] [blame] | 1045 | .unlocked_ioctl = gfs2_ioctl, |
| 1046 | .open = gfs2_open, |
Bob Peterson | df3fd11 | 2012-04-11 12:56:41 -0400 | [diff] [blame] | 1047 | .release = gfs2_release, |
Steven Whitehouse | 26c1a57 | 2006-09-04 15:32:10 -0400 | [diff] [blame] | 1048 | .fsync = gfs2_fsync, |
| 1049 | .lock = gfs2_lock, |
| 1050 | .flock = gfs2_flock, |
Arnd Bergmann | 6038f37 | 2010-08-15 18:52:59 +0200 | [diff] [blame] | 1051 | .llseek = default_llseek, |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1052 | }; |
| 1053 | |
Steven Whitehouse | f057f6c | 2009-01-12 10:43:39 +0000 | [diff] [blame] | 1054 | #endif /* CONFIG_GFS2_FS_LOCKING_DLM */ |
| 1055 | |
Christoph Hellwig | 10d2198 | 2009-04-07 19:42:17 +0200 | [diff] [blame] | 1056 | const struct file_operations gfs2_file_fops_nolock = { |
Wendy Cheng | c97bfe4 | 2007-11-29 17:56:51 -0500 | [diff] [blame] | 1057 | .llseek = gfs2_llseek, |
| 1058 | .read = do_sync_read, |
| 1059 | .aio_read = generic_file_aio_read, |
| 1060 | .write = do_sync_write, |
Steven Whitehouse | 56aa616 | 2009-12-08 10:25:33 +0000 | [diff] [blame] | 1061 | .aio_write = gfs2_file_aio_write, |
Wendy Cheng | c97bfe4 | 2007-11-29 17:56:51 -0500 | [diff] [blame] | 1062 | .unlocked_ioctl = gfs2_ioctl, |
| 1063 | .mmap = gfs2_mmap, |
| 1064 | .open = gfs2_open, |
Bob Peterson | df3fd11 | 2012-04-11 12:56:41 -0400 | [diff] [blame] | 1065 | .release = gfs2_release, |
Wendy Cheng | c97bfe4 | 2007-11-29 17:56:51 -0500 | [diff] [blame] | 1066 | .fsync = gfs2_fsync, |
| 1067 | .splice_read = generic_file_splice_read, |
| 1068 | .splice_write = generic_file_splice_write, |
Steven Whitehouse | f057f6c | 2009-01-12 10:43:39 +0000 | [diff] [blame] | 1069 | .setlease = generic_setlease, |
Christoph Hellwig | 2fe17c1 | 2011-01-14 13:07:43 +0100 | [diff] [blame] | 1070 | .fallocate = gfs2_fallocate, |
Wendy Cheng | c97bfe4 | 2007-11-29 17:56:51 -0500 | [diff] [blame] | 1071 | }; |
| 1072 | |
Christoph Hellwig | 10d2198 | 2009-04-07 19:42:17 +0200 | [diff] [blame] | 1073 | const struct file_operations gfs2_dir_fops_nolock = { |
Al Viro | d81a8ef | 2013-05-16 14:14:48 -0400 | [diff] [blame] | 1074 | .iterate = gfs2_readdir, |
Wendy Cheng | c97bfe4 | 2007-11-29 17:56:51 -0500 | [diff] [blame] | 1075 | .unlocked_ioctl = gfs2_ioctl, |
| 1076 | .open = gfs2_open, |
Bob Peterson | df3fd11 | 2012-04-11 12:56:41 -0400 | [diff] [blame] | 1077 | .release = gfs2_release, |
Wendy Cheng | c97bfe4 | 2007-11-29 17:56:51 -0500 | [diff] [blame] | 1078 | .fsync = gfs2_fsync, |
Arnd Bergmann | 6038f37 | 2010-08-15 18:52:59 +0200 | [diff] [blame] | 1079 | .llseek = default_llseek, |
Wendy Cheng | c97bfe4 | 2007-11-29 17:56:51 -0500 | [diff] [blame] | 1080 | }; |
| 1081 | |