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> |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 21 | #include <linux/ext2_fs.h> |
| 22 | #include <linux/crc32.h> |
Fabio Massimo Di Nitto | 7d30859 | 2006-09-19 07:56:29 +0200 | [diff] [blame] | 23 | #include <linux/lm_interface.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> |
| 26 | |
| 27 | #include "gfs2.h" |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 28 | #include "incore.h" |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 29 | #include "bmap.h" |
| 30 | #include "dir.h" |
| 31 | #include "glock.h" |
| 32 | #include "glops.h" |
| 33 | #include "inode.h" |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 34 | #include "log.h" |
| 35 | #include "meta_io.h" |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 36 | #include "quota.h" |
| 37 | #include "rgrp.h" |
| 38 | #include "trans.h" |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 39 | #include "util.h" |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 40 | #include "eaops.h" |
Steven Whitehouse | 5561093 | 2007-10-17 08:47:38 +0100 | [diff] [blame] | 41 | #include "ops_address.h" |
Adrian Bunk | 8af4c72 | 2008-02-17 10:17:12 +0200 | [diff] [blame] | 42 | #include "ops_inode.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 |
| 48 | * @origin: Where to seek from (SEEK_SET, SEEK_CUR, or SEEK_END) |
| 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 | |
| 56 | static loff_t gfs2_llseek(struct file *file, loff_t offset, int origin) |
| 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 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 62 | if (origin == 2) { |
| 63 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, |
| 64 | &i_gh); |
| 65 | if (!error) { |
Andi Kleen | 9465efc | 2008-06-27 11:05:24 +0200 | [diff] [blame] | 66 | error = generic_file_llseek_unlocked(file, offset, origin); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 67 | gfs2_glock_dq_uninit(&i_gh); |
| 68 | } |
| 69 | } else |
Andi Kleen | 9465efc | 2008-06-27 11:05:24 +0200 | [diff] [blame] | 70 | error = generic_file_llseek_unlocked(file, offset, origin); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 71 | |
| 72 | return error; |
| 73 | } |
| 74 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 75 | /** |
Steven Whitehouse | f0e522a | 2006-09-19 16:41:11 -0400 | [diff] [blame] | 76 | * gfs2_readdir - Read directory entries from a directory |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 77 | * @file: The directory to read from |
| 78 | * @dirent: Buffer for dirents |
| 79 | * @filldir: Function used to do the copying |
| 80 | * |
| 81 | * Returns: errno |
| 82 | */ |
| 83 | |
Steven Whitehouse | f0e522a | 2006-09-19 16:41:11 -0400 | [diff] [blame] | 84 | static int gfs2_readdir(struct file *file, void *dirent, filldir_t filldir) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 85 | { |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 86 | struct inode *dir = file->f_mapping->host; |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 87 | struct gfs2_inode *dip = GFS2_I(dir); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 88 | struct gfs2_holder d_gh; |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 89 | u64 offset = file->f_pos; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 90 | int error; |
| 91 | |
Steven Whitehouse | 719ee34 | 2008-09-18 13:53:59 +0100 | [diff] [blame] | 92 | gfs2_holder_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh); |
| 93 | error = gfs2_glock_nq(&d_gh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 94 | if (error) { |
| 95 | gfs2_holder_uninit(&d_gh); |
| 96 | return error; |
| 97 | } |
| 98 | |
Steven Whitehouse | 3699e3a | 2007-01-17 15:09:20 +0000 | [diff] [blame] | 99 | error = gfs2_dir_read(dir, &offset, dirent, filldir); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 100 | |
| 101 | gfs2_glock_dq_uninit(&d_gh); |
| 102 | |
| 103 | file->f_pos = offset; |
| 104 | |
| 105 | return error; |
| 106 | } |
| 107 | |
Steven Whitehouse | 128e5eb | 2006-10-02 11:24:43 -0400 | [diff] [blame] | 108 | /** |
| 109 | * fsflags_cvt |
| 110 | * @table: A table of 32 u32 flags |
| 111 | * @val: a 32 bit value to convert |
| 112 | * |
| 113 | * This function can be used to convert between fsflags values and |
| 114 | * GFS2's own flags values. |
| 115 | * |
| 116 | * Returns: the converted flags |
| 117 | */ |
| 118 | static u32 fsflags_cvt(const u32 *table, u32 val) |
| 119 | { |
| 120 | u32 res = 0; |
| 121 | while(val) { |
| 122 | if (val & 1) |
| 123 | res |= *table; |
| 124 | table++; |
| 125 | val >>= 1; |
| 126 | } |
| 127 | return res; |
| 128 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 129 | |
Steven Whitehouse | 128e5eb | 2006-10-02 11:24:43 -0400 | [diff] [blame] | 130 | static const u32 fsflags_to_gfs2[32] = { |
| 131 | [3] = GFS2_DIF_SYNC, |
| 132 | [4] = GFS2_DIF_IMMUTABLE, |
| 133 | [5] = GFS2_DIF_APPENDONLY, |
| 134 | [7] = GFS2_DIF_NOATIME, |
| 135 | [12] = GFS2_DIF_EXHASH, |
Steven Whitehouse | b9af7ca | 2007-07-18 11:40:06 +0100 | [diff] [blame] | 136 | [14] = GFS2_DIF_INHERIT_JDATA, |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 137 | }; |
| 138 | |
Steven Whitehouse | 128e5eb | 2006-10-02 11:24:43 -0400 | [diff] [blame] | 139 | static const u32 gfs2_to_fsflags[32] = { |
| 140 | [gfs2fl_Sync] = FS_SYNC_FL, |
| 141 | [gfs2fl_Immutable] = FS_IMMUTABLE_FL, |
| 142 | [gfs2fl_AppendOnly] = FS_APPEND_FL, |
| 143 | [gfs2fl_NoAtime] = FS_NOATIME_FL, |
| 144 | [gfs2fl_ExHash] = FS_INDEX_FL, |
Steven Whitehouse | 128e5eb | 2006-10-02 11:24:43 -0400 | [diff] [blame] | 145 | [gfs2fl_InheritJdata] = FS_JOURNAL_DATA_FL, |
Steven Whitehouse | 7ea9ea8 | 2006-03-31 15:01:28 -0500 | [diff] [blame] | 146 | }; |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 147 | |
Steven Whitehouse | b09e593 | 2006-04-07 11:17:32 -0400 | [diff] [blame] | 148 | static int gfs2_get_flags(struct file *filp, u32 __user *ptr) |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 149 | { |
Josef Sipek | 8145409 | 2006-12-08 02:37:03 -0800 | [diff] [blame] | 150 | struct inode *inode = filp->f_path.dentry->d_inode; |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 151 | struct gfs2_inode *ip = GFS2_I(inode); |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 152 | struct gfs2_holder gh; |
| 153 | int error; |
Steven Whitehouse | 128e5eb | 2006-10-02 11:24:43 -0400 | [diff] [blame] | 154 | u32 fsflags; |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 155 | |
Steven Whitehouse | 719ee34 | 2008-09-18 13:53:59 +0100 | [diff] [blame] | 156 | gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &gh); |
| 157 | error = gfs2_glock_nq(&gh); |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 158 | if (error) |
| 159 | return error; |
Steven Whitehouse | 907b9bc | 2006-09-25 09:26:04 -0400 | [diff] [blame] | 160 | |
Steven Whitehouse | 128e5eb | 2006-10-02 11:24:43 -0400 | [diff] [blame] | 161 | fsflags = fsflags_cvt(gfs2_to_fsflags, ip->i_di.di_flags); |
Steven Whitehouse | c9f6a6b | 2008-07-10 16:09:29 +0100 | [diff] [blame] | 162 | if (!S_ISDIR(inode->i_mode) && ip->i_di.di_flags & GFS2_DIF_JDATA) |
| 163 | fsflags |= FS_JOURNAL_DATA_FL; |
Steven Whitehouse | 128e5eb | 2006-10-02 11:24:43 -0400 | [diff] [blame] | 164 | if (put_user(fsflags, ptr)) |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 165 | error = -EFAULT; |
| 166 | |
Steven Whitehouse | 3cc3f71 | 2007-10-15 15:40:33 +0100 | [diff] [blame] | 167 | gfs2_glock_dq(&gh); |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 168 | gfs2_holder_uninit(&gh); |
| 169 | return error; |
| 170 | } |
| 171 | |
Steven Whitehouse | 6b124d8 | 2006-11-08 12:51:06 -0500 | [diff] [blame] | 172 | void gfs2_set_inode_flags(struct inode *inode) |
| 173 | { |
| 174 | struct gfs2_inode *ip = GFS2_I(inode); |
| 175 | struct gfs2_dinode_host *di = &ip->i_di; |
| 176 | unsigned int flags = inode->i_flags; |
| 177 | |
| 178 | flags &= ~(S_SYNC|S_APPEND|S_IMMUTABLE|S_NOATIME|S_DIRSYNC); |
| 179 | if (di->di_flags & GFS2_DIF_IMMUTABLE) |
| 180 | flags |= S_IMMUTABLE; |
| 181 | if (di->di_flags & GFS2_DIF_APPENDONLY) |
| 182 | flags |= S_APPEND; |
| 183 | if (di->di_flags & GFS2_DIF_NOATIME) |
| 184 | flags |= S_NOATIME; |
| 185 | if (di->di_flags & GFS2_DIF_SYNC) |
| 186 | flags |= S_SYNC; |
| 187 | inode->i_flags = flags; |
| 188 | } |
| 189 | |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 190 | /* Flags that can be set by user space */ |
| 191 | #define GFS2_FLAGS_USER_SET (GFS2_DIF_JDATA| \ |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 192 | GFS2_DIF_IMMUTABLE| \ |
| 193 | GFS2_DIF_APPENDONLY| \ |
| 194 | GFS2_DIF_NOATIME| \ |
| 195 | GFS2_DIF_SYNC| \ |
| 196 | GFS2_DIF_SYSTEM| \ |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 197 | GFS2_DIF_INHERIT_JDATA) |
| 198 | |
| 199 | /** |
| 200 | * gfs2_set_flags - set flags on an inode |
| 201 | * @inode: The inode |
| 202 | * @flags: The flags to set |
| 203 | * @mask: Indicates which flags are valid |
| 204 | * |
| 205 | */ |
Steven Whitehouse | b09e593 | 2006-04-07 11:17:32 -0400 | [diff] [blame] | 206 | 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] | 207 | { |
Josef Sipek | 8145409 | 2006-12-08 02:37:03 -0800 | [diff] [blame] | 208 | struct inode *inode = filp->f_path.dentry->d_inode; |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 209 | struct gfs2_inode *ip = GFS2_I(inode); |
| 210 | struct gfs2_sbd *sdp = GFS2_SB(inode); |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 211 | struct buffer_head *bh; |
| 212 | struct gfs2_holder gh; |
| 213 | int error; |
Steven Whitehouse | 55eccc6 | 2006-04-04 14:29:30 -0400 | [diff] [blame] | 214 | u32 new_flags, flags; |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 215 | |
Miklos Szeredi | f58ba88 | 2008-07-02 21:12:01 +0200 | [diff] [blame] | 216 | error = mnt_want_write(filp->f_path.mnt); |
Abhijith Das | 52f341c | 2006-07-21 02:03:21 -0400 | [diff] [blame] | 217 | if (error) |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 218 | return error; |
| 219 | |
Miklos Szeredi | f58ba88 | 2008-07-02 21:12:01 +0200 | [diff] [blame] | 220 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); |
| 221 | if (error) |
| 222 | goto out_drop_write; |
| 223 | |
Steven Whitehouse | 55eccc6 | 2006-04-04 14:29:30 -0400 | [diff] [blame] | 224 | flags = ip->i_di.di_flags; |
| 225 | new_flags = (flags & ~mask) | (reqflags & mask); |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 226 | if ((new_flags ^ flags) == 0) |
| 227 | goto out; |
| 228 | |
| 229 | error = -EINVAL; |
| 230 | if ((new_flags ^ flags) & ~GFS2_FLAGS_USER_SET) |
| 231 | goto out; |
| 232 | |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 233 | error = -EPERM; |
| 234 | if (IS_IMMUTABLE(inode) && (new_flags & GFS2_DIF_IMMUTABLE)) |
| 235 | goto out; |
| 236 | if (IS_APPEND(inode) && (new_flags & GFS2_DIF_APPENDONLY)) |
| 237 | goto out; |
Steven Whitehouse | 907b9bc | 2006-09-25 09:26:04 -0400 | [diff] [blame] | 238 | if (((new_flags ^ flags) & GFS2_DIF_IMMUTABLE) && |
Steven Whitehouse | b9cb981 | 2006-05-12 17:07:56 -0400 | [diff] [blame] | 239 | !capable(CAP_LINUX_IMMUTABLE)) |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 240 | goto out; |
Steven Whitehouse | b9cb981 | 2006-05-12 17:07:56 -0400 | [diff] [blame] | 241 | if (!IS_IMMUTABLE(inode)) { |
Miklos Szeredi | f58ba88 | 2008-07-02 21:12:01 +0200 | [diff] [blame] | 242 | error = gfs2_permission(inode, MAY_WRITE); |
Steven Whitehouse | b9cb981 | 2006-05-12 17:07:56 -0400 | [diff] [blame] | 243 | if (error) |
| 244 | goto out; |
| 245 | } |
Steven Whitehouse | 5561093 | 2007-10-17 08:47:38 +0100 | [diff] [blame] | 246 | if ((flags ^ new_flags) & GFS2_DIF_JDATA) { |
| 247 | if (flags & GFS2_DIF_JDATA) |
| 248 | gfs2_log_flush(sdp, ip->i_gl); |
| 249 | error = filemap_fdatawrite(inode->i_mapping); |
| 250 | if (error) |
| 251 | goto out; |
| 252 | error = filemap_fdatawait(inode->i_mapping); |
| 253 | if (error) |
| 254 | goto out; |
| 255 | } |
Steven Whitehouse | 55eccc6 | 2006-04-04 14:29:30 -0400 | [diff] [blame] | 256 | error = gfs2_trans_begin(sdp, RES_DINODE, 0); |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 257 | if (error) |
| 258 | goto out; |
Steven Whitehouse | 55eccc6 | 2006-04-04 14:29:30 -0400 | [diff] [blame] | 259 | error = gfs2_meta_inode_buffer(ip, &bh); |
| 260 | if (error) |
| 261 | goto out_trans_end; |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 262 | gfs2_trans_add_bh(ip->i_gl, bh, 1); |
| 263 | ip->i_di.di_flags = new_flags; |
Steven Whitehouse | 539e5d6 | 2006-10-31 15:07:05 -0500 | [diff] [blame] | 264 | gfs2_dinode_out(ip, bh->b_data); |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 265 | brelse(bh); |
Steven Whitehouse | 6b124d8 | 2006-11-08 12:51:06 -0500 | [diff] [blame] | 266 | gfs2_set_inode_flags(inode); |
Steven Whitehouse | 5561093 | 2007-10-17 08:47:38 +0100 | [diff] [blame] | 267 | gfs2_set_aops(inode); |
Steven Whitehouse | 55eccc6 | 2006-04-04 14:29:30 -0400 | [diff] [blame] | 268 | out_trans_end: |
| 269 | gfs2_trans_end(sdp); |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 270 | out: |
| 271 | gfs2_glock_dq_uninit(&gh); |
Miklos Szeredi | f58ba88 | 2008-07-02 21:12:01 +0200 | [diff] [blame] | 272 | out_drop_write: |
| 273 | mnt_drop_write(filp->f_path.mnt); |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 274 | return error; |
| 275 | } |
| 276 | |
Steven Whitehouse | b09e593 | 2006-04-07 11:17:32 -0400 | [diff] [blame] | 277 | static int gfs2_set_flags(struct file *filp, u32 __user *ptr) |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 278 | { |
Steven Whitehouse | b9af7ca | 2007-07-18 11:40:06 +0100 | [diff] [blame] | 279 | struct inode *inode = filp->f_path.dentry->d_inode; |
Steven Whitehouse | 128e5eb | 2006-10-02 11:24:43 -0400 | [diff] [blame] | 280 | u32 fsflags, gfsflags; |
| 281 | if (get_user(fsflags, ptr)) |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 282 | return -EFAULT; |
Steven Whitehouse | 128e5eb | 2006-10-02 11:24:43 -0400 | [diff] [blame] | 283 | gfsflags = fsflags_cvt(fsflags_to_gfs2, fsflags); |
Steven Whitehouse | b9af7ca | 2007-07-18 11:40:06 +0100 | [diff] [blame] | 284 | if (!S_ISDIR(inode->i_mode)) { |
| 285 | if (gfsflags & GFS2_DIF_INHERIT_JDATA) |
| 286 | gfsflags ^= (GFS2_DIF_JDATA | GFS2_DIF_INHERIT_JDATA); |
Steven Whitehouse | b9af7ca | 2007-07-18 11:40:06 +0100 | [diff] [blame] | 287 | return do_gfs2_set_flags(filp, gfsflags, ~0); |
| 288 | } |
| 289 | return do_gfs2_set_flags(filp, gfsflags, ~GFS2_DIF_JDATA); |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 290 | } |
| 291 | |
Steven Whitehouse | b09e593 | 2006-04-07 11:17:32 -0400 | [diff] [blame] | 292 | 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] | 293 | { |
| 294 | switch(cmd) { |
Steven Whitehouse | 128e5eb | 2006-10-02 11:24:43 -0400 | [diff] [blame] | 295 | case FS_IOC_GETFLAGS: |
Steven Whitehouse | b09e593 | 2006-04-07 11:17:32 -0400 | [diff] [blame] | 296 | return gfs2_get_flags(filp, (u32 __user *)arg); |
Steven Whitehouse | 128e5eb | 2006-10-02 11:24:43 -0400 | [diff] [blame] | 297 | case FS_IOC_SETFLAGS: |
Steven Whitehouse | b09e593 | 2006-04-07 11:17:32 -0400 | [diff] [blame] | 298 | return gfs2_set_flags(filp, (u32 __user *)arg); |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 299 | } |
| 300 | return -ENOTTY; |
| 301 | } |
| 302 | |
Steven Whitehouse | 3cc3f71 | 2007-10-15 15:40:33 +0100 | [diff] [blame] | 303 | /** |
| 304 | * gfs2_allocate_page_backing - Use bmap to allocate blocks |
| 305 | * @page: The (locked) page to allocate backing for |
| 306 | * |
| 307 | * We try to allocate all the blocks required for the page in |
| 308 | * one go. This might fail for various reasons, so we keep |
| 309 | * trying until all the blocks to back this page are allocated. |
| 310 | * If some of the blocks are already allocated, thats ok too. |
| 311 | */ |
| 312 | |
| 313 | static int gfs2_allocate_page_backing(struct page *page) |
| 314 | { |
| 315 | struct inode *inode = page->mapping->host; |
| 316 | struct buffer_head bh; |
| 317 | unsigned long size = PAGE_CACHE_SIZE; |
| 318 | u64 lblock = page->index << (PAGE_CACHE_SHIFT - inode->i_blkbits); |
| 319 | |
| 320 | do { |
| 321 | bh.b_state = 0; |
| 322 | bh.b_size = size; |
Bob Peterson | e9e1ef2 | 2007-12-10 14:13:27 -0600 | [diff] [blame] | 323 | gfs2_block_map(inode, lblock, &bh, 1); |
Steven Whitehouse | 3cc3f71 | 2007-10-15 15:40:33 +0100 | [diff] [blame] | 324 | if (!buffer_mapped(&bh)) |
| 325 | return -EIO; |
| 326 | size -= bh.b_size; |
| 327 | lblock += (bh.b_size >> inode->i_blkbits); |
| 328 | } while(size > 0); |
| 329 | return 0; |
| 330 | } |
| 331 | |
| 332 | /** |
| 333 | * gfs2_page_mkwrite - Make a shared, mmap()ed, page writable |
| 334 | * @vma: The virtual memory area |
| 335 | * @page: The page which is about to become writable |
| 336 | * |
| 337 | * When the page becomes writable, we need to ensure that we have |
| 338 | * blocks allocated on disk to back that page. |
| 339 | */ |
| 340 | |
| 341 | static int gfs2_page_mkwrite(struct vm_area_struct *vma, struct page *page) |
| 342 | { |
| 343 | struct inode *inode = vma->vm_file->f_path.dentry->d_inode; |
| 344 | struct gfs2_inode *ip = GFS2_I(inode); |
| 345 | struct gfs2_sbd *sdp = GFS2_SB(inode); |
| 346 | unsigned long last_index; |
| 347 | u64 pos = page->index << (PAGE_CACHE_SIZE - inode->i_blkbits); |
| 348 | unsigned int data_blocks, ind_blocks, rblocks; |
| 349 | int alloc_required = 0; |
| 350 | struct gfs2_holder gh; |
| 351 | struct gfs2_alloc *al; |
| 352 | int ret; |
| 353 | |
Steven Whitehouse | 719ee34 | 2008-09-18 13:53:59 +0100 | [diff] [blame] | 354 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); |
| 355 | ret = gfs2_glock_nq(&gh); |
Steven Whitehouse | 3cc3f71 | 2007-10-15 15:40:33 +0100 | [diff] [blame] | 356 | if (ret) |
| 357 | goto out; |
| 358 | |
| 359 | set_bit(GIF_SW_PAGED, &ip->i_flags); |
| 360 | gfs2_write_calc_reserv(ip, PAGE_CACHE_SIZE, &data_blocks, &ind_blocks); |
| 361 | ret = gfs2_write_alloc_required(ip, pos, PAGE_CACHE_SIZE, &alloc_required); |
| 362 | if (ret || !alloc_required) |
| 363 | goto out_unlock; |
Steven Whitehouse | 6dbd822 | 2008-01-10 15:18:55 +0000 | [diff] [blame] | 364 | ret = -ENOMEM; |
Steven Whitehouse | 3cc3f71 | 2007-10-15 15:40:33 +0100 | [diff] [blame] | 365 | al = gfs2_alloc_get(ip); |
Steven Whitehouse | 6dbd822 | 2008-01-10 15:18:55 +0000 | [diff] [blame] | 366 | if (al == NULL) |
| 367 | goto out_unlock; |
| 368 | |
Steven Whitehouse | d82661d | 2008-03-10 15:34:50 +0000 | [diff] [blame] | 369 | ret = gfs2_quota_lock_check(ip); |
Steven Whitehouse | 3cc3f71 | 2007-10-15 15:40:33 +0100 | [diff] [blame] | 370 | if (ret) |
| 371 | goto out_alloc_put; |
Steven Whitehouse | 3cc3f71 | 2007-10-15 15:40:33 +0100 | [diff] [blame] | 372 | al->al_requested = data_blocks + ind_blocks; |
| 373 | ret = gfs2_inplace_reserve(ip); |
| 374 | if (ret) |
| 375 | goto out_quota_unlock; |
| 376 | |
| 377 | rblocks = RES_DINODE + ind_blocks; |
| 378 | if (gfs2_is_jdata(ip)) |
| 379 | rblocks += data_blocks ? data_blocks : 1; |
| 380 | if (ind_blocks || data_blocks) |
| 381 | rblocks += RES_STATFS + RES_QUOTA; |
| 382 | ret = gfs2_trans_begin(sdp, rblocks, 0); |
| 383 | if (ret) |
| 384 | goto out_trans_fail; |
| 385 | |
| 386 | lock_page(page); |
| 387 | ret = -EINVAL; |
| 388 | last_index = ip->i_inode.i_size >> PAGE_CACHE_SHIFT; |
| 389 | if (page->index > last_index) |
| 390 | goto out_unlock_page; |
Steven Whitehouse | b7fe2e3 | 2008-01-17 15:12:03 +0000 | [diff] [blame] | 391 | ret = 0; |
Steven Whitehouse | 3cc3f71 | 2007-10-15 15:40:33 +0100 | [diff] [blame] | 392 | if (!PageUptodate(page) || page->mapping != ip->i_inode.i_mapping) |
| 393 | goto out_unlock_page; |
| 394 | if (gfs2_is_stuffed(ip)) { |
| 395 | ret = gfs2_unstuff_dinode(ip, page); |
| 396 | if (ret) |
| 397 | goto out_unlock_page; |
| 398 | } |
| 399 | ret = gfs2_allocate_page_backing(page); |
| 400 | |
| 401 | out_unlock_page: |
| 402 | unlock_page(page); |
| 403 | gfs2_trans_end(sdp); |
| 404 | out_trans_fail: |
| 405 | gfs2_inplace_release(ip); |
| 406 | out_quota_unlock: |
| 407 | gfs2_quota_unlock(ip); |
| 408 | out_alloc_put: |
| 409 | gfs2_alloc_put(ip); |
| 410 | out_unlock: |
| 411 | gfs2_glock_dq(&gh); |
| 412 | out: |
| 413 | gfs2_holder_uninit(&gh); |
| 414 | return ret; |
| 415 | } |
| 416 | |
| 417 | static struct vm_operations_struct gfs2_vm_ops = { |
| 418 | .fault = filemap_fault, |
| 419 | .page_mkwrite = gfs2_page_mkwrite, |
| 420 | }; |
| 421 | |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 422 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 423 | /** |
| 424 | * gfs2_mmap - |
| 425 | * @file: The file to map |
| 426 | * @vma: The VMA which described the mapping |
| 427 | * |
| 428 | * Returns: 0 or error code |
| 429 | */ |
| 430 | |
| 431 | static int gfs2_mmap(struct file *file, struct vm_area_struct *vma) |
| 432 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 433 | struct gfs2_inode *ip = GFS2_I(file->f_mapping->host); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 434 | struct gfs2_holder i_gh; |
| 435 | int error; |
| 436 | |
Steven Whitehouse | 719ee34 | 2008-09-18 13:53:59 +0100 | [diff] [blame] | 437 | gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); |
| 438 | error = gfs2_glock_nq(&i_gh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 439 | if (error) { |
| 440 | gfs2_holder_uninit(&i_gh); |
| 441 | return error; |
| 442 | } |
| 443 | |
Steven Whitehouse | 3cc3f71 | 2007-10-15 15:40:33 +0100 | [diff] [blame] | 444 | vma->vm_ops = &gfs2_vm_ops; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 445 | |
| 446 | gfs2_glock_dq_uninit(&i_gh); |
| 447 | |
| 448 | return error; |
| 449 | } |
| 450 | |
| 451 | /** |
| 452 | * gfs2_open - open a file |
| 453 | * @inode: the inode to open |
| 454 | * @file: the struct file for this opening |
| 455 | * |
| 456 | * Returns: errno |
| 457 | */ |
| 458 | |
| 459 | static int gfs2_open(struct inode *inode, struct file *file) |
| 460 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 461 | struct gfs2_inode *ip = GFS2_I(inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 462 | struct gfs2_holder i_gh; |
| 463 | struct gfs2_file *fp; |
| 464 | int error; |
| 465 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 466 | fp = kzalloc(sizeof(struct gfs2_file), GFP_KERNEL); |
| 467 | if (!fp) |
| 468 | return -ENOMEM; |
| 469 | |
Steven Whitehouse | f55ab26 | 2006-02-21 12:51:39 +0000 | [diff] [blame] | 470 | mutex_init(&fp->f_fl_mutex); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 471 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 472 | gfs2_assert_warn(GFS2_SB(inode), !file->private_data); |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 473 | file->private_data = fp; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 474 | |
Steven Whitehouse | b60623c | 2006-11-01 12:22:46 -0500 | [diff] [blame] | 475 | if (S_ISREG(ip->i_inode.i_mode)) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 476 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, |
| 477 | &i_gh); |
| 478 | if (error) |
| 479 | goto fail; |
| 480 | |
| 481 | if (!(file->f_flags & O_LARGEFILE) && |
| 482 | ip->i_di.di_size > MAX_NON_LFS) { |
Alan Cox | a9c62a1 | 2007-10-16 23:30:22 -0700 | [diff] [blame] | 483 | error = -EOVERFLOW; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 484 | goto fail_gunlock; |
| 485 | } |
| 486 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 487 | gfs2_glock_dq_uninit(&i_gh); |
| 488 | } |
| 489 | |
| 490 | return 0; |
| 491 | |
Steven Whitehouse | 420b9e5 | 2006-07-31 15:42:17 -0400 | [diff] [blame] | 492 | fail_gunlock: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 493 | gfs2_glock_dq_uninit(&i_gh); |
Steven Whitehouse | 420b9e5 | 2006-07-31 15:42:17 -0400 | [diff] [blame] | 494 | fail: |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 495 | file->private_data = NULL; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 496 | kfree(fp); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 497 | return error; |
| 498 | } |
| 499 | |
| 500 | /** |
| 501 | * gfs2_close - called to close a struct file |
| 502 | * @inode: the inode the struct file belongs to |
| 503 | * @file: the struct file being closed |
| 504 | * |
| 505 | * Returns: errno |
| 506 | */ |
| 507 | |
| 508 | static int gfs2_close(struct inode *inode, struct file *file) |
| 509 | { |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 510 | struct gfs2_sbd *sdp = inode->i_sb->s_fs_info; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 511 | struct gfs2_file *fp; |
| 512 | |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 513 | fp = file->private_data; |
| 514 | file->private_data = NULL; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 515 | |
| 516 | if (gfs2_assert_warn(sdp, fp)) |
| 517 | return -EIO; |
| 518 | |
| 519 | kfree(fp); |
| 520 | |
| 521 | return 0; |
| 522 | } |
| 523 | |
| 524 | /** |
| 525 | * gfs2_fsync - sync the dirty data for a file (across the cluster) |
| 526 | * @file: the file that points to the dentry (we ignore this) |
| 527 | * @dentry: the dentry that points to the inode to sync |
| 528 | * |
Steven Whitehouse | 33c3de3 | 2006-11-30 10:14:32 -0500 | [diff] [blame] | 529 | * The VFS will flush "normal" data for us. We only need to worry |
| 530 | * about metadata here. For journaled data, we just do a log flush |
| 531 | * as we can't avoid it. Otherwise we can just bale out if datasync |
| 532 | * is set. For stuffed inodes we must flush the log in order to |
| 533 | * ensure that all data is on disk. |
| 534 | * |
Steven Whitehouse | 34126f9 | 2006-12-07 09:13:14 -0500 | [diff] [blame] | 535 | * The call to write_inode_now() is there to write back metadata and |
| 536 | * the inode itself. It does also try and write the data, but thats |
| 537 | * (hopefully) a no-op due to the VFS having already called filemap_fdatawrite() |
| 538 | * for us. |
| 539 | * |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 540 | * Returns: errno |
| 541 | */ |
| 542 | |
| 543 | static int gfs2_fsync(struct file *file, struct dentry *dentry, int datasync) |
| 544 | { |
Steven Whitehouse | 33c3de3 | 2006-11-30 10:14:32 -0500 | [diff] [blame] | 545 | struct inode *inode = dentry->d_inode; |
| 546 | int sync_state = inode->i_state & (I_DIRTY_SYNC|I_DIRTY_DATASYNC); |
| 547 | int ret = 0; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 548 | |
Steven Whitehouse | 33c3de3 | 2006-11-30 10:14:32 -0500 | [diff] [blame] | 549 | if (gfs2_is_jdata(GFS2_I(inode))) { |
| 550 | gfs2_log_flush(GFS2_SB(inode), GFS2_I(inode)->i_gl); |
| 551 | return 0; |
| 552 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 553 | |
Steven Whitehouse | 33c3de3 | 2006-11-30 10:14:32 -0500 | [diff] [blame] | 554 | if (sync_state != 0) { |
| 555 | if (!datasync) |
Steven Whitehouse | 34126f9 | 2006-12-07 09:13:14 -0500 | [diff] [blame] | 556 | ret = write_inode_now(inode, 0); |
Steven Whitehouse | 33c3de3 | 2006-11-30 10:14:32 -0500 | [diff] [blame] | 557 | |
| 558 | if (gfs2_is_stuffed(GFS2_I(inode))) |
| 559 | gfs2_log_flush(GFS2_SB(inode), GFS2_I(inode)->i_gl); |
| 560 | } |
| 561 | |
| 562 | return ret; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 563 | } |
| 564 | |
| 565 | /** |
Marc Eshel | 6044606 | 2007-01-15 18:33:36 -0500 | [diff] [blame] | 566 | * gfs2_setlease - acquire/release a file lease |
| 567 | * @file: the file pointer |
| 568 | * @arg: lease type |
| 569 | * @fl: file lock |
| 570 | * |
| 571 | * Returns: errno |
| 572 | */ |
| 573 | |
| 574 | static int gfs2_setlease(struct file *file, long arg, struct file_lock **fl) |
| 575 | { |
| 576 | struct gfs2_sbd *sdp = GFS2_SB(file->f_mapping->host); |
| 577 | |
| 578 | /* |
| 579 | * We don't currently have a way to enforce a lease across the whole |
| 580 | * cluster; until we do, disable leases (by just returning -EINVAL), |
| 581 | * unless the administrator has requested purely local locking. |
| 582 | */ |
| 583 | if (!sdp->sd_args.ar_localflocks) |
| 584 | return -EINVAL; |
Christoph Hellwig | 0af1a45 | 2007-07-31 00:39:22 -0700 | [diff] [blame] | 585 | return generic_setlease(file, arg, fl); |
Marc Eshel | 6044606 | 2007-01-15 18:33:36 -0500 | [diff] [blame] | 586 | } |
| 587 | |
Steven Whitehouse | da755fd | 2008-01-30 15:34:04 +0000 | [diff] [blame] | 588 | static int gfs2_lm_plock_get(struct gfs2_sbd *sdp, struct lm_lockname *name, |
| 589 | struct file *file, struct file_lock *fl) |
| 590 | { |
| 591 | int error = -EIO; |
| 592 | if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags))) |
| 593 | error = sdp->sd_lockstruct.ls_ops->lm_plock_get( |
| 594 | sdp->sd_lockstruct.ls_lockspace, name, file, fl); |
| 595 | return error; |
| 596 | } |
| 597 | |
| 598 | static int gfs2_lm_plock(struct gfs2_sbd *sdp, struct lm_lockname *name, |
| 599 | struct file *file, int cmd, struct file_lock *fl) |
| 600 | { |
| 601 | int error = -EIO; |
| 602 | if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags))) |
| 603 | error = sdp->sd_lockstruct.ls_ops->lm_plock( |
| 604 | sdp->sd_lockstruct.ls_lockspace, name, file, cmd, fl); |
| 605 | return error; |
| 606 | } |
| 607 | |
| 608 | static int gfs2_lm_punlock(struct gfs2_sbd *sdp, struct lm_lockname *name, |
| 609 | struct file *file, struct file_lock *fl) |
| 610 | { |
| 611 | int error = -EIO; |
| 612 | if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags))) |
| 613 | error = sdp->sd_lockstruct.ls_ops->lm_punlock( |
| 614 | sdp->sd_lockstruct.ls_lockspace, name, file, fl); |
| 615 | return error; |
| 616 | } |
| 617 | |
Marc Eshel | 6044606 | 2007-01-15 18:33:36 -0500 | [diff] [blame] | 618 | /** |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 619 | * gfs2_lock - acquire/release a posix lock on a file |
| 620 | * @file: the file pointer |
| 621 | * @cmd: either modify or retrieve lock state, possibly wait |
| 622 | * @fl: type and range of lock |
| 623 | * |
| 624 | * Returns: errno |
| 625 | */ |
| 626 | |
| 627 | static int gfs2_lock(struct file *file, int cmd, struct file_lock *fl) |
| 628 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 629 | struct gfs2_inode *ip = GFS2_I(file->f_mapping->host); |
| 630 | struct gfs2_sbd *sdp = GFS2_SB(file->f_mapping->host); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 631 | struct lm_lockname name = |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 632 | { .ln_number = ip->i_no_addr, |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 633 | .ln_type = LM_TYPE_PLOCK }; |
| 634 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 635 | if (!(fl->fl_flags & FL_POSIX)) |
| 636 | return -ENOLCK; |
Pavel Emelyanov | 7afaac6 | 2007-10-01 14:41:13 -0700 | [diff] [blame] | 637 | if (__mandatory_lock(&ip->i_inode)) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 638 | return -ENOLCK; |
| 639 | |
Marc Eshel | 586759f | 2006-11-14 16:37:25 -0500 | [diff] [blame] | 640 | if (cmd == F_CANCELLK) { |
| 641 | /* Hack: */ |
| 642 | cmd = F_SETLK; |
| 643 | fl->fl_type = F_UNLCK; |
| 644 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 645 | if (IS_GETLK(cmd)) |
| 646 | return gfs2_lm_plock_get(sdp, &name, file, fl); |
| 647 | else if (fl->fl_type == F_UNLCK) |
| 648 | return gfs2_lm_punlock(sdp, &name, file, fl); |
| 649 | else |
| 650 | return gfs2_lm_plock(sdp, &name, file, cmd, fl); |
| 651 | } |
| 652 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 653 | static int do_flock(struct file *file, int cmd, struct file_lock *fl) |
| 654 | { |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 655 | struct gfs2_file *fp = file->private_data; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 656 | struct gfs2_holder *fl_gh = &fp->f_fl_gh; |
Josef Sipek | 8145409 | 2006-12-08 02:37:03 -0800 | [diff] [blame] | 657 | struct gfs2_inode *ip = GFS2_I(file->f_path.dentry->d_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 658 | struct gfs2_glock *gl; |
| 659 | unsigned int state; |
| 660 | int flags; |
| 661 | int error = 0; |
| 662 | |
| 663 | state = (fl->fl_type == F_WRLCK) ? LM_ST_EXCLUSIVE : LM_ST_SHARED; |
Steven Whitehouse | 6802e34 | 2008-05-21 17:03:22 +0100 | [diff] [blame] | 664 | flags = (IS_SETLKW(cmd) ? 0 : LM_FLAG_TRY) | GL_EXACT | GL_NOCACHE; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 665 | |
Steven Whitehouse | f55ab26 | 2006-02-21 12:51:39 +0000 | [diff] [blame] | 666 | mutex_lock(&fp->f_fl_mutex); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 667 | |
| 668 | gl = fl_gh->gh_gl; |
| 669 | if (gl) { |
| 670 | if (fl_gh->gh_state == state) |
| 671 | goto out; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 672 | flock_lock_file_wait(file, |
Steven Whitehouse | 907b9bc | 2006-09-25 09:26:04 -0400 | [diff] [blame] | 673 | &(struct file_lock){.fl_type = F_UNLCK}); |
Abhijith Das | b4c2016 | 2007-09-13 23:35:27 -0500 | [diff] [blame] | 674 | gfs2_glock_dq_wait(fl_gh); |
| 675 | gfs2_holder_reinit(state, flags, fl_gh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 676 | } else { |
Steven Whitehouse | 6802e34 | 2008-05-21 17:03:22 +0100 | [diff] [blame] | 677 | error = gfs2_glock_get(GFS2_SB(&ip->i_inode), ip->i_no_addr, |
| 678 | &gfs2_flock_glops, CREATE, &gl); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 679 | if (error) |
| 680 | goto out; |
Abhijith Das | b4c2016 | 2007-09-13 23:35:27 -0500 | [diff] [blame] | 681 | gfs2_holder_init(gl, state, flags, fl_gh); |
| 682 | gfs2_glock_put(gl); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 683 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 684 | error = gfs2_glock_nq(fl_gh); |
| 685 | if (error) { |
| 686 | gfs2_holder_uninit(fl_gh); |
| 687 | if (error == GLR_TRYFAILED) |
| 688 | error = -EAGAIN; |
| 689 | } else { |
| 690 | error = flock_lock_file_wait(file, fl); |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 691 | gfs2_assert_warn(GFS2_SB(&ip->i_inode), !error); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 692 | } |
| 693 | |
Steven Whitehouse | 420b9e5 | 2006-07-31 15:42:17 -0400 | [diff] [blame] | 694 | out: |
Steven Whitehouse | f55ab26 | 2006-02-21 12:51:39 +0000 | [diff] [blame] | 695 | mutex_unlock(&fp->f_fl_mutex); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 696 | return error; |
| 697 | } |
| 698 | |
| 699 | static void do_unflock(struct file *file, struct file_lock *fl) |
| 700 | { |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 701 | struct gfs2_file *fp = file->private_data; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 702 | struct gfs2_holder *fl_gh = &fp->f_fl_gh; |
| 703 | |
Steven Whitehouse | f55ab26 | 2006-02-21 12:51:39 +0000 | [diff] [blame] | 704 | mutex_lock(&fp->f_fl_mutex); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 705 | flock_lock_file_wait(file, fl); |
| 706 | if (fl_gh->gh_gl) |
| 707 | gfs2_glock_dq_uninit(fl_gh); |
Steven Whitehouse | f55ab26 | 2006-02-21 12:51:39 +0000 | [diff] [blame] | 708 | mutex_unlock(&fp->f_fl_mutex); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 709 | } |
| 710 | |
| 711 | /** |
| 712 | * gfs2_flock - acquire/release a flock lock on a file |
| 713 | * @file: the file pointer |
| 714 | * @cmd: either modify or retrieve lock state, possibly wait |
| 715 | * @fl: type and range of lock |
| 716 | * |
| 717 | * Returns: errno |
| 718 | */ |
| 719 | |
| 720 | static int gfs2_flock(struct file *file, int cmd, struct file_lock *fl) |
| 721 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 722 | struct gfs2_inode *ip = GFS2_I(file->f_mapping->host); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 723 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 724 | if (!(fl->fl_flags & FL_FLOCK)) |
| 725 | return -ENOLCK; |
Pavel Emelyanov | 7afaac6 | 2007-10-01 14:41:13 -0700 | [diff] [blame] | 726 | if (__mandatory_lock(&ip->i_inode)) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 727 | return -ENOLCK; |
| 728 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 729 | if (fl->fl_type == F_UNLCK) { |
| 730 | do_unflock(file, fl); |
| 731 | return 0; |
Steven Whitehouse | d00223f | 2006-10-02 10:28:05 -0400 | [diff] [blame] | 732 | } else { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 733 | return do_flock(file, cmd, fl); |
Steven Whitehouse | d00223f | 2006-10-02 10:28:05 -0400 | [diff] [blame] | 734 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 735 | } |
| 736 | |
Steven Whitehouse | b0dd930 | 2006-07-03 13:47:02 -0400 | [diff] [blame] | 737 | const struct file_operations gfs2_file_fops = { |
Steven Whitehouse | 26c1a57 | 2006-09-04 15:32:10 -0400 | [diff] [blame] | 738 | .llseek = gfs2_llseek, |
Steven Whitehouse | d00223f | 2006-10-02 10:28:05 -0400 | [diff] [blame] | 739 | .read = do_sync_read, |
Steven Whitehouse | 26c1a57 | 2006-09-04 15:32:10 -0400 | [diff] [blame] | 740 | .aio_read = generic_file_aio_read, |
Steven Whitehouse | d00223f | 2006-10-02 10:28:05 -0400 | [diff] [blame] | 741 | .write = do_sync_write, |
Steven Whitehouse | 26c1a57 | 2006-09-04 15:32:10 -0400 | [diff] [blame] | 742 | .aio_write = generic_file_aio_write, |
| 743 | .unlocked_ioctl = gfs2_ioctl, |
| 744 | .mmap = gfs2_mmap, |
| 745 | .open = gfs2_open, |
| 746 | .release = gfs2_close, |
| 747 | .fsync = gfs2_fsync, |
| 748 | .lock = gfs2_lock, |
Steven Whitehouse | 26c1a57 | 2006-09-04 15:32:10 -0400 | [diff] [blame] | 749 | .flock = gfs2_flock, |
| 750 | .splice_read = generic_file_splice_read, |
| 751 | .splice_write = generic_file_splice_write, |
Marc Eshel | 6044606 | 2007-01-15 18:33:36 -0500 | [diff] [blame] | 752 | .setlease = gfs2_setlease, |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 753 | }; |
| 754 | |
Steven Whitehouse | b0dd930 | 2006-07-03 13:47:02 -0400 | [diff] [blame] | 755 | const struct file_operations gfs2_dir_fops = { |
Steven Whitehouse | 26c1a57 | 2006-09-04 15:32:10 -0400 | [diff] [blame] | 756 | .readdir = gfs2_readdir, |
| 757 | .unlocked_ioctl = gfs2_ioctl, |
| 758 | .open = gfs2_open, |
| 759 | .release = gfs2_close, |
| 760 | .fsync = gfs2_fsync, |
| 761 | .lock = gfs2_lock, |
| 762 | .flock = gfs2_flock, |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 763 | }; |
| 764 | |
Wendy Cheng | c97bfe4 | 2007-11-29 17:56:51 -0500 | [diff] [blame] | 765 | const struct file_operations gfs2_file_fops_nolock = { |
| 766 | .llseek = gfs2_llseek, |
| 767 | .read = do_sync_read, |
| 768 | .aio_read = generic_file_aio_read, |
| 769 | .write = do_sync_write, |
| 770 | .aio_write = generic_file_aio_write, |
| 771 | .unlocked_ioctl = gfs2_ioctl, |
| 772 | .mmap = gfs2_mmap, |
| 773 | .open = gfs2_open, |
| 774 | .release = gfs2_close, |
| 775 | .fsync = gfs2_fsync, |
| 776 | .splice_read = generic_file_splice_read, |
| 777 | .splice_write = generic_file_splice_write, |
| 778 | .setlease = gfs2_setlease, |
| 779 | }; |
| 780 | |
| 781 | const struct file_operations gfs2_dir_fops_nolock = { |
| 782 | .readdir = gfs2_readdir, |
| 783 | .unlocked_ioctl = gfs2_ioctl, |
| 784 | .open = gfs2_open, |
| 785 | .release = gfs2_close, |
| 786 | .fsync = gfs2_fsync, |
| 787 | }; |
| 788 | |