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> |
Steven Whitehouse | 18ec7d5 | 2006-02-08 11:50:51 +0000 | [diff] [blame] | 18 | #include <linux/fs.h> |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 19 | #include <linux/gfs2_ondisk.h> |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 20 | #include <linux/ext2_fs.h> |
| 21 | #include <linux/crc32.h> |
Fabio Massimo Di Nitto | 7d30859 | 2006-09-19 07:56:29 +0200 | [diff] [blame] | 22 | #include <linux/lm_interface.h> |
Steven Whitehouse | 33c3de3 | 2006-11-30 10:14:32 -0500 | [diff] [blame] | 23 | #include <linux/writeback.h> |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 24 | #include <asm/uaccess.h> |
| 25 | |
| 26 | #include "gfs2.h" |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 27 | #include "incore.h" |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 28 | #include "bmap.h" |
| 29 | #include "dir.h" |
| 30 | #include "glock.h" |
| 31 | #include "glops.h" |
| 32 | #include "inode.h" |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 33 | #include "lm.h" |
| 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" |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 41 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 42 | /** |
| 43 | * gfs2_llseek - seek to a location in a file |
| 44 | * @file: the file |
| 45 | * @offset: the offset |
| 46 | * @origin: Where to seek from (SEEK_SET, SEEK_CUR, or SEEK_END) |
| 47 | * |
| 48 | * SEEK_END requires the glock for the file because it references the |
| 49 | * file's size. |
| 50 | * |
| 51 | * Returns: The new offset, or errno |
| 52 | */ |
| 53 | |
| 54 | static loff_t gfs2_llseek(struct file *file, loff_t offset, int origin) |
| 55 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 56 | struct gfs2_inode *ip = GFS2_I(file->f_mapping->host); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 57 | struct gfs2_holder i_gh; |
| 58 | loff_t error; |
| 59 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 60 | if (origin == 2) { |
| 61 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, |
| 62 | &i_gh); |
| 63 | if (!error) { |
| 64 | error = remote_llseek(file, offset, origin); |
| 65 | gfs2_glock_dq_uninit(&i_gh); |
| 66 | } |
| 67 | } else |
| 68 | error = remote_llseek(file, offset, origin); |
| 69 | |
| 70 | return error; |
| 71 | } |
| 72 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 73 | /** |
Steven Whitehouse | f0e522a | 2006-09-19 16:41:11 -0400 | [diff] [blame] | 74 | * gfs2_readdir - Read directory entries from a directory |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 75 | * @file: The directory to read from |
| 76 | * @dirent: Buffer for dirents |
| 77 | * @filldir: Function used to do the copying |
| 78 | * |
| 79 | * Returns: errno |
| 80 | */ |
| 81 | |
Steven Whitehouse | f0e522a | 2006-09-19 16:41:11 -0400 | [diff] [blame] | 82 | static int gfs2_readdir(struct file *file, void *dirent, filldir_t filldir) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 83 | { |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 84 | struct inode *dir = file->f_mapping->host; |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 85 | struct gfs2_inode *dip = GFS2_I(dir); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 86 | struct gfs2_holder d_gh; |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 87 | u64 offset = file->f_pos; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 88 | int error; |
| 89 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 90 | gfs2_holder_init(dip->i_gl, LM_ST_SHARED, GL_ATIME, &d_gh); |
| 91 | error = gfs2_glock_nq_atime(&d_gh); |
| 92 | if (error) { |
| 93 | gfs2_holder_uninit(&d_gh); |
| 94 | return error; |
| 95 | } |
| 96 | |
Steven Whitehouse | 3699e3a | 2007-01-17 15:09:20 +0000 | [diff] [blame] | 97 | error = gfs2_dir_read(dir, &offset, dirent, filldir); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 98 | |
| 99 | gfs2_glock_dq_uninit(&d_gh); |
| 100 | |
| 101 | file->f_pos = offset; |
| 102 | |
| 103 | return error; |
| 104 | } |
| 105 | |
Steven Whitehouse | 128e5eb | 2006-10-02 11:24:43 -0400 | [diff] [blame] | 106 | /** |
| 107 | * fsflags_cvt |
| 108 | * @table: A table of 32 u32 flags |
| 109 | * @val: a 32 bit value to convert |
| 110 | * |
| 111 | * This function can be used to convert between fsflags values and |
| 112 | * GFS2's own flags values. |
| 113 | * |
| 114 | * Returns: the converted flags |
| 115 | */ |
| 116 | static u32 fsflags_cvt(const u32 *table, u32 val) |
| 117 | { |
| 118 | u32 res = 0; |
| 119 | while(val) { |
| 120 | if (val & 1) |
| 121 | res |= *table; |
| 122 | table++; |
| 123 | val >>= 1; |
| 124 | } |
| 125 | return res; |
| 126 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 127 | |
Steven Whitehouse | 128e5eb | 2006-10-02 11:24:43 -0400 | [diff] [blame] | 128 | static const u32 fsflags_to_gfs2[32] = { |
| 129 | [3] = GFS2_DIF_SYNC, |
| 130 | [4] = GFS2_DIF_IMMUTABLE, |
| 131 | [5] = GFS2_DIF_APPENDONLY, |
| 132 | [7] = GFS2_DIF_NOATIME, |
| 133 | [12] = GFS2_DIF_EXHASH, |
Steven Whitehouse | b9af7ca | 2007-07-18 11:40:06 +0100 | [diff] [blame] | 134 | [14] = GFS2_DIF_INHERIT_JDATA, |
| 135 | [20] = GFS2_DIF_INHERIT_DIRECTIO, |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 136 | }; |
| 137 | |
Steven Whitehouse | 128e5eb | 2006-10-02 11:24:43 -0400 | [diff] [blame] | 138 | static const u32 gfs2_to_fsflags[32] = { |
| 139 | [gfs2fl_Sync] = FS_SYNC_FL, |
| 140 | [gfs2fl_Immutable] = FS_IMMUTABLE_FL, |
| 141 | [gfs2fl_AppendOnly] = FS_APPEND_FL, |
| 142 | [gfs2fl_NoAtime] = FS_NOATIME_FL, |
| 143 | [gfs2fl_ExHash] = FS_INDEX_FL, |
Steven Whitehouse | 128e5eb | 2006-10-02 11:24:43 -0400 | [diff] [blame] | 144 | [gfs2fl_InheritDirectio] = FS_DIRECTIO_FL, |
| 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 | |
| 156 | gfs2_holder_init(ip->i_gl, LM_ST_SHARED, GL_ATIME, &gh); |
Steven Whitehouse | dcd2479 | 2006-11-16 11:08:16 -0500 | [diff] [blame] | 157 | error = gfs2_glock_nq_atime(&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 | b9af7ca | 2007-07-18 11:40:06 +0100 | [diff] [blame] | 162 | if (!S_ISDIR(inode->i_mode)) { |
| 163 | if (ip->i_di.di_flags & GFS2_DIF_JDATA) |
| 164 | fsflags |= FS_JOURNAL_DATA_FL; |
| 165 | if (ip->i_di.di_flags & GFS2_DIF_DIRECTIO) |
| 166 | fsflags |= FS_DIRECTIO_FL; |
| 167 | } |
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); |
| 179 | struct gfs2_dinode_host *di = &ip->i_di; |
| 180 | unsigned int flags = inode->i_flags; |
| 181 | |
| 182 | flags &= ~(S_SYNC|S_APPEND|S_IMMUTABLE|S_NOATIME|S_DIRSYNC); |
| 183 | if (di->di_flags & GFS2_DIF_IMMUTABLE) |
| 184 | flags |= S_IMMUTABLE; |
| 185 | if (di->di_flags & GFS2_DIF_APPENDONLY) |
| 186 | flags |= S_APPEND; |
| 187 | if (di->di_flags & GFS2_DIF_NOATIME) |
| 188 | flags |= S_NOATIME; |
| 189 | if (di->di_flags & GFS2_DIF_SYNC) |
| 190 | flags |= S_SYNC; |
| 191 | inode->i_flags = flags; |
| 192 | } |
| 193 | |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 194 | /* Flags that can be set by user space */ |
| 195 | #define GFS2_FLAGS_USER_SET (GFS2_DIF_JDATA| \ |
| 196 | GFS2_DIF_DIRECTIO| \ |
| 197 | GFS2_DIF_IMMUTABLE| \ |
| 198 | GFS2_DIF_APPENDONLY| \ |
| 199 | GFS2_DIF_NOATIME| \ |
| 200 | GFS2_DIF_SYNC| \ |
| 201 | GFS2_DIF_SYSTEM| \ |
| 202 | GFS2_DIF_INHERIT_DIRECTIO| \ |
| 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 | { |
Josef Sipek | 8145409 | 2006-12-08 02:37:03 -0800 | [diff] [blame] | 214 | struct inode *inode = filp->f_path.dentry->d_inode; |
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 | |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 222 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); |
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 | |
Steven Whitehouse | 55eccc6 | 2006-04-04 14:29:30 -0400 | [diff] [blame] | 226 | flags = ip->i_di.di_flags; |
| 227 | new_flags = (flags & ~mask) | (reqflags & mask); |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 228 | if ((new_flags ^ flags) == 0) |
| 229 | goto out; |
| 230 | |
| 231 | error = -EINVAL; |
| 232 | if ((new_flags ^ flags) & ~GFS2_FLAGS_USER_SET) |
| 233 | goto out; |
| 234 | |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 235 | error = -EPERM; |
| 236 | if (IS_IMMUTABLE(inode) && (new_flags & GFS2_DIF_IMMUTABLE)) |
| 237 | goto out; |
| 238 | if (IS_APPEND(inode) && (new_flags & GFS2_DIF_APPENDONLY)) |
| 239 | goto out; |
Steven Whitehouse | 907b9bc | 2006-09-25 09:26:04 -0400 | [diff] [blame] | 240 | if (((new_flags ^ flags) & GFS2_DIF_IMMUTABLE) && |
Steven Whitehouse | b9cb981 | 2006-05-12 17:07:56 -0400 | [diff] [blame] | 241 | !capable(CAP_LINUX_IMMUTABLE)) |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 242 | goto out; |
Steven Whitehouse | b9cb981 | 2006-05-12 17:07:56 -0400 | [diff] [blame] | 243 | if (!IS_IMMUTABLE(inode)) { |
Steven Whitehouse | faf450e | 2006-06-22 10:59:10 -0400 | [diff] [blame] | 244 | error = permission(inode, MAY_WRITE, NULL); |
Steven Whitehouse | b9cb981 | 2006-05-12 17:07:56 -0400 | [diff] [blame] | 245 | if (error) |
| 246 | goto out; |
| 247 | } |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 248 | |
Steven Whitehouse | 55eccc6 | 2006-04-04 14:29:30 -0400 | [diff] [blame] | 249 | error = gfs2_trans_begin(sdp, RES_DINODE, 0); |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 250 | if (error) |
| 251 | goto out; |
Steven Whitehouse | 55eccc6 | 2006-04-04 14:29:30 -0400 | [diff] [blame] | 252 | error = gfs2_meta_inode_buffer(ip, &bh); |
| 253 | if (error) |
| 254 | goto out_trans_end; |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 255 | gfs2_trans_add_bh(ip->i_gl, bh, 1); |
| 256 | ip->i_di.di_flags = new_flags; |
Steven Whitehouse | 539e5d6 | 2006-10-31 15:07:05 -0500 | [diff] [blame] | 257 | gfs2_dinode_out(ip, bh->b_data); |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 258 | brelse(bh); |
Steven Whitehouse | 6b124d8 | 2006-11-08 12:51:06 -0500 | [diff] [blame] | 259 | gfs2_set_inode_flags(inode); |
Steven Whitehouse | 55eccc6 | 2006-04-04 14:29:30 -0400 | [diff] [blame] | 260 | out_trans_end: |
| 261 | gfs2_trans_end(sdp); |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 262 | out: |
| 263 | gfs2_glock_dq_uninit(&gh); |
| 264 | return error; |
| 265 | } |
| 266 | |
Steven Whitehouse | b09e593 | 2006-04-07 11:17:32 -0400 | [diff] [blame] | 267 | static int gfs2_set_flags(struct file *filp, u32 __user *ptr) |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 268 | { |
Steven Whitehouse | b9af7ca | 2007-07-18 11:40:06 +0100 | [diff] [blame] | 269 | struct inode *inode = filp->f_path.dentry->d_inode; |
Steven Whitehouse | 128e5eb | 2006-10-02 11:24:43 -0400 | [diff] [blame] | 270 | u32 fsflags, gfsflags; |
| 271 | if (get_user(fsflags, ptr)) |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 272 | return -EFAULT; |
Steven Whitehouse | 128e5eb | 2006-10-02 11:24:43 -0400 | [diff] [blame] | 273 | gfsflags = fsflags_cvt(fsflags_to_gfs2, fsflags); |
Steven Whitehouse | b9af7ca | 2007-07-18 11:40:06 +0100 | [diff] [blame] | 274 | if (!S_ISDIR(inode->i_mode)) { |
| 275 | if (gfsflags & GFS2_DIF_INHERIT_JDATA) |
| 276 | gfsflags ^= (GFS2_DIF_JDATA | GFS2_DIF_INHERIT_JDATA); |
| 277 | if (gfsflags & GFS2_DIF_INHERIT_DIRECTIO) |
| 278 | gfsflags ^= (GFS2_DIF_DIRECTIO | GFS2_DIF_INHERIT_DIRECTIO); |
| 279 | return do_gfs2_set_flags(filp, gfsflags, ~0); |
| 280 | } |
| 281 | return do_gfs2_set_flags(filp, gfsflags, ~GFS2_DIF_JDATA); |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 282 | } |
| 283 | |
Steven Whitehouse | b09e593 | 2006-04-07 11:17:32 -0400 | [diff] [blame] | 284 | 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] | 285 | { |
| 286 | switch(cmd) { |
Steven Whitehouse | 128e5eb | 2006-10-02 11:24:43 -0400 | [diff] [blame] | 287 | case FS_IOC_GETFLAGS: |
Steven Whitehouse | b09e593 | 2006-04-07 11:17:32 -0400 | [diff] [blame] | 288 | return gfs2_get_flags(filp, (u32 __user *)arg); |
Steven Whitehouse | 128e5eb | 2006-10-02 11:24:43 -0400 | [diff] [blame] | 289 | case FS_IOC_SETFLAGS: |
Steven Whitehouse | b09e593 | 2006-04-07 11:17:32 -0400 | [diff] [blame] | 290 | return gfs2_set_flags(filp, (u32 __user *)arg); |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 291 | } |
| 292 | return -ENOTTY; |
| 293 | } |
| 294 | |
Steven Whitehouse | 3cc3f71 | 2007-10-15 15:40:33 +0100 | [diff] [blame^] | 295 | /** |
| 296 | * gfs2_allocate_page_backing - Use bmap to allocate blocks |
| 297 | * @page: The (locked) page to allocate backing for |
| 298 | * |
| 299 | * We try to allocate all the blocks required for the page in |
| 300 | * one go. This might fail for various reasons, so we keep |
| 301 | * trying until all the blocks to back this page are allocated. |
| 302 | * If some of the blocks are already allocated, thats ok too. |
| 303 | */ |
| 304 | |
| 305 | static int gfs2_allocate_page_backing(struct page *page) |
| 306 | { |
| 307 | struct inode *inode = page->mapping->host; |
| 308 | struct buffer_head bh; |
| 309 | unsigned long size = PAGE_CACHE_SIZE; |
| 310 | u64 lblock = page->index << (PAGE_CACHE_SHIFT - inode->i_blkbits); |
| 311 | |
| 312 | do { |
| 313 | bh.b_state = 0; |
| 314 | bh.b_size = size; |
| 315 | gfs2_block_map(inode, lblock, 1, &bh); |
| 316 | if (!buffer_mapped(&bh)) |
| 317 | return -EIO; |
| 318 | size -= bh.b_size; |
| 319 | lblock += (bh.b_size >> inode->i_blkbits); |
| 320 | } while(size > 0); |
| 321 | return 0; |
| 322 | } |
| 323 | |
| 324 | /** |
| 325 | * gfs2_page_mkwrite - Make a shared, mmap()ed, page writable |
| 326 | * @vma: The virtual memory area |
| 327 | * @page: The page which is about to become writable |
| 328 | * |
| 329 | * When the page becomes writable, we need to ensure that we have |
| 330 | * blocks allocated on disk to back that page. |
| 331 | */ |
| 332 | |
| 333 | static int gfs2_page_mkwrite(struct vm_area_struct *vma, struct page *page) |
| 334 | { |
| 335 | struct inode *inode = vma->vm_file->f_path.dentry->d_inode; |
| 336 | struct gfs2_inode *ip = GFS2_I(inode); |
| 337 | struct gfs2_sbd *sdp = GFS2_SB(inode); |
| 338 | unsigned long last_index; |
| 339 | u64 pos = page->index << (PAGE_CACHE_SIZE - inode->i_blkbits); |
| 340 | unsigned int data_blocks, ind_blocks, rblocks; |
| 341 | int alloc_required = 0; |
| 342 | struct gfs2_holder gh; |
| 343 | struct gfs2_alloc *al; |
| 344 | int ret; |
| 345 | |
| 346 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_ATIME, &gh); |
| 347 | ret = gfs2_glock_nq_atime(&gh); |
| 348 | if (ret) |
| 349 | goto out; |
| 350 | |
| 351 | set_bit(GIF_SW_PAGED, &ip->i_flags); |
| 352 | gfs2_write_calc_reserv(ip, PAGE_CACHE_SIZE, &data_blocks, &ind_blocks); |
| 353 | ret = gfs2_write_alloc_required(ip, pos, PAGE_CACHE_SIZE, &alloc_required); |
| 354 | if (ret || !alloc_required) |
| 355 | goto out_unlock; |
| 356 | |
| 357 | ip->i_alloc.al_requested = 0; |
| 358 | al = gfs2_alloc_get(ip); |
| 359 | ret = gfs2_quota_lock(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); |
| 360 | if (ret) |
| 361 | goto out_alloc_put; |
| 362 | ret = gfs2_quota_check(ip, ip->i_inode.i_uid, ip->i_inode.i_gid); |
| 363 | if (ret) |
| 364 | goto out_quota_unlock; |
| 365 | al->al_requested = data_blocks + ind_blocks; |
| 366 | ret = gfs2_inplace_reserve(ip); |
| 367 | if (ret) |
| 368 | goto out_quota_unlock; |
| 369 | |
| 370 | rblocks = RES_DINODE + ind_blocks; |
| 371 | if (gfs2_is_jdata(ip)) |
| 372 | rblocks += data_blocks ? data_blocks : 1; |
| 373 | if (ind_blocks || data_blocks) |
| 374 | rblocks += RES_STATFS + RES_QUOTA; |
| 375 | ret = gfs2_trans_begin(sdp, rblocks, 0); |
| 376 | if (ret) |
| 377 | goto out_trans_fail; |
| 378 | |
| 379 | lock_page(page); |
| 380 | ret = -EINVAL; |
| 381 | last_index = ip->i_inode.i_size >> PAGE_CACHE_SHIFT; |
| 382 | if (page->index > last_index) |
| 383 | goto out_unlock_page; |
| 384 | if (!PageUptodate(page) || page->mapping != ip->i_inode.i_mapping) |
| 385 | goto out_unlock_page; |
| 386 | if (gfs2_is_stuffed(ip)) { |
| 387 | ret = gfs2_unstuff_dinode(ip, page); |
| 388 | if (ret) |
| 389 | goto out_unlock_page; |
| 390 | } |
| 391 | ret = gfs2_allocate_page_backing(page); |
| 392 | |
| 393 | out_unlock_page: |
| 394 | unlock_page(page); |
| 395 | gfs2_trans_end(sdp); |
| 396 | out_trans_fail: |
| 397 | gfs2_inplace_release(ip); |
| 398 | out_quota_unlock: |
| 399 | gfs2_quota_unlock(ip); |
| 400 | out_alloc_put: |
| 401 | gfs2_alloc_put(ip); |
| 402 | out_unlock: |
| 403 | gfs2_glock_dq(&gh); |
| 404 | out: |
| 405 | gfs2_holder_uninit(&gh); |
| 406 | return ret; |
| 407 | } |
| 408 | |
| 409 | static struct vm_operations_struct gfs2_vm_ops = { |
| 410 | .fault = filemap_fault, |
| 411 | .page_mkwrite = gfs2_page_mkwrite, |
| 412 | }; |
| 413 | |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 414 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 415 | /** |
| 416 | * gfs2_mmap - |
| 417 | * @file: The file to map |
| 418 | * @vma: The VMA which described the mapping |
| 419 | * |
| 420 | * Returns: 0 or error code |
| 421 | */ |
| 422 | |
| 423 | static int gfs2_mmap(struct file *file, struct vm_area_struct *vma) |
| 424 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 425 | struct gfs2_inode *ip = GFS2_I(file->f_mapping->host); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 426 | struct gfs2_holder i_gh; |
| 427 | int error; |
| 428 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 429 | gfs2_holder_init(ip->i_gl, LM_ST_SHARED, GL_ATIME, &i_gh); |
| 430 | error = gfs2_glock_nq_atime(&i_gh); |
| 431 | if (error) { |
| 432 | gfs2_holder_uninit(&i_gh); |
| 433 | return error; |
| 434 | } |
| 435 | |
Steven Whitehouse | 3cc3f71 | 2007-10-15 15:40:33 +0100 | [diff] [blame^] | 436 | vma->vm_ops = &gfs2_vm_ops; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 437 | |
| 438 | gfs2_glock_dq_uninit(&i_gh); |
| 439 | |
| 440 | return error; |
| 441 | } |
| 442 | |
| 443 | /** |
| 444 | * gfs2_open - open a file |
| 445 | * @inode: the inode to open |
| 446 | * @file: the struct file for this opening |
| 447 | * |
| 448 | * Returns: errno |
| 449 | */ |
| 450 | |
| 451 | static int gfs2_open(struct inode *inode, struct file *file) |
| 452 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 453 | struct gfs2_inode *ip = GFS2_I(inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 454 | struct gfs2_holder i_gh; |
| 455 | struct gfs2_file *fp; |
| 456 | int error; |
| 457 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 458 | fp = kzalloc(sizeof(struct gfs2_file), GFP_KERNEL); |
| 459 | if (!fp) |
| 460 | return -ENOMEM; |
| 461 | |
Steven Whitehouse | f55ab26 | 2006-02-21 12:51:39 +0000 | [diff] [blame] | 462 | mutex_init(&fp->f_fl_mutex); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 463 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 464 | gfs2_assert_warn(GFS2_SB(inode), !file->private_data); |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 465 | file->private_data = fp; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 466 | |
Steven Whitehouse | b60623c | 2006-11-01 12:22:46 -0500 | [diff] [blame] | 467 | if (S_ISREG(ip->i_inode.i_mode)) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 468 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, |
| 469 | &i_gh); |
| 470 | if (error) |
| 471 | goto fail; |
| 472 | |
| 473 | if (!(file->f_flags & O_LARGEFILE) && |
| 474 | ip->i_di.di_size > MAX_NON_LFS) { |
Alan Cox | a9c62a1 | 2007-10-16 23:30:22 -0700 | [diff] [blame] | 475 | error = -EOVERFLOW; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 476 | goto fail_gunlock; |
| 477 | } |
| 478 | |
| 479 | /* Listen to the Direct I/O flag */ |
| 480 | |
| 481 | if (ip->i_di.di_flags & GFS2_DIF_DIRECTIO) |
| 482 | file->f_flags |= O_DIRECT; |
| 483 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 484 | gfs2_glock_dq_uninit(&i_gh); |
| 485 | } |
| 486 | |
| 487 | return 0; |
| 488 | |
Steven Whitehouse | 420b9e5 | 2006-07-31 15:42:17 -0400 | [diff] [blame] | 489 | fail_gunlock: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 490 | gfs2_glock_dq_uninit(&i_gh); |
Steven Whitehouse | 420b9e5 | 2006-07-31 15:42:17 -0400 | [diff] [blame] | 491 | fail: |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 492 | file->private_data = NULL; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 493 | kfree(fp); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 494 | return error; |
| 495 | } |
| 496 | |
| 497 | /** |
| 498 | * gfs2_close - called to close a struct file |
| 499 | * @inode: the inode the struct file belongs to |
| 500 | * @file: the struct file being closed |
| 501 | * |
| 502 | * Returns: errno |
| 503 | */ |
| 504 | |
| 505 | static int gfs2_close(struct inode *inode, struct file *file) |
| 506 | { |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 507 | struct gfs2_sbd *sdp = inode->i_sb->s_fs_info; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 508 | struct gfs2_file *fp; |
| 509 | |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 510 | fp = file->private_data; |
| 511 | file->private_data = NULL; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 512 | |
| 513 | if (gfs2_assert_warn(sdp, fp)) |
| 514 | return -EIO; |
| 515 | |
| 516 | kfree(fp); |
| 517 | |
| 518 | return 0; |
| 519 | } |
| 520 | |
| 521 | /** |
| 522 | * gfs2_fsync - sync the dirty data for a file (across the cluster) |
| 523 | * @file: the file that points to the dentry (we ignore this) |
| 524 | * @dentry: the dentry that points to the inode to sync |
| 525 | * |
Steven Whitehouse | 33c3de3 | 2006-11-30 10:14:32 -0500 | [diff] [blame] | 526 | * The VFS will flush "normal" data for us. We only need to worry |
| 527 | * about metadata here. For journaled data, we just do a log flush |
| 528 | * as we can't avoid it. Otherwise we can just bale out if datasync |
| 529 | * is set. For stuffed inodes we must flush the log in order to |
| 530 | * ensure that all data is on disk. |
| 531 | * |
Steven Whitehouse | 34126f9 | 2006-12-07 09:13:14 -0500 | [diff] [blame] | 532 | * The call to write_inode_now() is there to write back metadata and |
| 533 | * the inode itself. It does also try and write the data, but thats |
| 534 | * (hopefully) a no-op due to the VFS having already called filemap_fdatawrite() |
| 535 | * for us. |
| 536 | * |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 537 | * Returns: errno |
| 538 | */ |
| 539 | |
| 540 | static int gfs2_fsync(struct file *file, struct dentry *dentry, int datasync) |
| 541 | { |
Steven Whitehouse | 33c3de3 | 2006-11-30 10:14:32 -0500 | [diff] [blame] | 542 | struct inode *inode = dentry->d_inode; |
| 543 | int sync_state = inode->i_state & (I_DIRTY_SYNC|I_DIRTY_DATASYNC); |
| 544 | int ret = 0; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 545 | |
Steven Whitehouse | 33c3de3 | 2006-11-30 10:14:32 -0500 | [diff] [blame] | 546 | if (gfs2_is_jdata(GFS2_I(inode))) { |
| 547 | gfs2_log_flush(GFS2_SB(inode), GFS2_I(inode)->i_gl); |
| 548 | return 0; |
| 549 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 550 | |
Steven Whitehouse | 33c3de3 | 2006-11-30 10:14:32 -0500 | [diff] [blame] | 551 | if (sync_state != 0) { |
| 552 | if (!datasync) |
Steven Whitehouse | 34126f9 | 2006-12-07 09:13:14 -0500 | [diff] [blame] | 553 | ret = write_inode_now(inode, 0); |
Steven Whitehouse | 33c3de3 | 2006-11-30 10:14:32 -0500 | [diff] [blame] | 554 | |
| 555 | if (gfs2_is_stuffed(GFS2_I(inode))) |
| 556 | gfs2_log_flush(GFS2_SB(inode), GFS2_I(inode)->i_gl); |
| 557 | } |
| 558 | |
| 559 | return ret; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 560 | } |
| 561 | |
| 562 | /** |
Marc Eshel | 6044606 | 2007-01-15 18:33:36 -0500 | [diff] [blame] | 563 | * gfs2_setlease - acquire/release a file lease |
| 564 | * @file: the file pointer |
| 565 | * @arg: lease type |
| 566 | * @fl: file lock |
| 567 | * |
| 568 | * Returns: errno |
| 569 | */ |
| 570 | |
| 571 | static int gfs2_setlease(struct file *file, long arg, struct file_lock **fl) |
| 572 | { |
| 573 | struct gfs2_sbd *sdp = GFS2_SB(file->f_mapping->host); |
| 574 | |
| 575 | /* |
| 576 | * We don't currently have a way to enforce a lease across the whole |
| 577 | * cluster; until we do, disable leases (by just returning -EINVAL), |
| 578 | * unless the administrator has requested purely local locking. |
| 579 | */ |
| 580 | if (!sdp->sd_args.ar_localflocks) |
| 581 | return -EINVAL; |
Christoph Hellwig | 0af1a45 | 2007-07-31 00:39:22 -0700 | [diff] [blame] | 582 | return generic_setlease(file, arg, fl); |
Marc Eshel | 6044606 | 2007-01-15 18:33:36 -0500 | [diff] [blame] | 583 | } |
| 584 | |
| 585 | /** |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 586 | * gfs2_lock - acquire/release a posix lock on a file |
| 587 | * @file: the file pointer |
| 588 | * @cmd: either modify or retrieve lock state, possibly wait |
| 589 | * @fl: type and range of lock |
| 590 | * |
| 591 | * Returns: errno |
| 592 | */ |
| 593 | |
| 594 | static int gfs2_lock(struct file *file, int cmd, struct file_lock *fl) |
| 595 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 596 | struct gfs2_inode *ip = GFS2_I(file->f_mapping->host); |
| 597 | struct gfs2_sbd *sdp = GFS2_SB(file->f_mapping->host); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 598 | struct lm_lockname name = |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 599 | { .ln_number = ip->i_no_addr, |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 600 | .ln_type = LM_TYPE_PLOCK }; |
| 601 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 602 | if (!(fl->fl_flags & FL_POSIX)) |
| 603 | return -ENOLCK; |
Pavel Emelyanov | 7afaac6 | 2007-10-01 14:41:13 -0700 | [diff] [blame] | 604 | if (__mandatory_lock(&ip->i_inode)) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 605 | return -ENOLCK; |
| 606 | |
| 607 | if (sdp->sd_args.ar_localflocks) { |
| 608 | if (IS_GETLK(cmd)) { |
Marc Eshel | 9d6a8c5 | 2007-02-21 00:55:18 -0500 | [diff] [blame] | 609 | posix_test_lock(file, fl); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 610 | return 0; |
| 611 | } else { |
Steven Whitehouse | 8628de0 | 2006-03-31 16:48:41 -0500 | [diff] [blame] | 612 | return posix_lock_file_wait(file, fl); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 613 | } |
| 614 | } |
| 615 | |
Marc Eshel | 586759f | 2006-11-14 16:37:25 -0500 | [diff] [blame] | 616 | if (cmd == F_CANCELLK) { |
| 617 | /* Hack: */ |
| 618 | cmd = F_SETLK; |
| 619 | fl->fl_type = F_UNLCK; |
| 620 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 621 | if (IS_GETLK(cmd)) |
| 622 | return gfs2_lm_plock_get(sdp, &name, file, fl); |
| 623 | else if (fl->fl_type == F_UNLCK) |
| 624 | return gfs2_lm_punlock(sdp, &name, file, fl); |
| 625 | else |
| 626 | return gfs2_lm_plock(sdp, &name, file, cmd, fl); |
| 627 | } |
| 628 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 629 | static int do_flock(struct file *file, int cmd, struct file_lock *fl) |
| 630 | { |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 631 | struct gfs2_file *fp = file->private_data; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 632 | struct gfs2_holder *fl_gh = &fp->f_fl_gh; |
Josef Sipek | 8145409 | 2006-12-08 02:37:03 -0800 | [diff] [blame] | 633 | struct gfs2_inode *ip = GFS2_I(file->f_path.dentry->d_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 634 | struct gfs2_glock *gl; |
| 635 | unsigned int state; |
| 636 | int flags; |
| 637 | int error = 0; |
| 638 | |
| 639 | state = (fl->fl_type == F_WRLCK) ? LM_ST_EXCLUSIVE : LM_ST_SHARED; |
Abhijith Das | b4c2016 | 2007-09-13 23:35:27 -0500 | [diff] [blame] | 640 | flags = (IS_SETLKW(cmd) ? 0 : LM_FLAG_TRY) | GL_EXACT | GL_NOCACHE |
| 641 | | GL_FLOCK; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 642 | |
Steven Whitehouse | f55ab26 | 2006-02-21 12:51:39 +0000 | [diff] [blame] | 643 | mutex_lock(&fp->f_fl_mutex); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 644 | |
| 645 | gl = fl_gh->gh_gl; |
| 646 | if (gl) { |
| 647 | if (fl_gh->gh_state == state) |
| 648 | goto out; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 649 | flock_lock_file_wait(file, |
Steven Whitehouse | 907b9bc | 2006-09-25 09:26:04 -0400 | [diff] [blame] | 650 | &(struct file_lock){.fl_type = F_UNLCK}); |
Abhijith Das | b4c2016 | 2007-09-13 23:35:27 -0500 | [diff] [blame] | 651 | gfs2_glock_dq_wait(fl_gh); |
| 652 | gfs2_holder_reinit(state, flags, fl_gh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 653 | } else { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 654 | error = gfs2_glock_get(GFS2_SB(&ip->i_inode), |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 655 | ip->i_no_addr, &gfs2_flock_glops, |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 656 | CREATE, &gl); |
| 657 | if (error) |
| 658 | goto out; |
Abhijith Das | b4c2016 | 2007-09-13 23:35:27 -0500 | [diff] [blame] | 659 | gfs2_holder_init(gl, state, flags, fl_gh); |
| 660 | gfs2_glock_put(gl); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 661 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 662 | error = gfs2_glock_nq(fl_gh); |
| 663 | if (error) { |
| 664 | gfs2_holder_uninit(fl_gh); |
| 665 | if (error == GLR_TRYFAILED) |
| 666 | error = -EAGAIN; |
| 667 | } else { |
| 668 | error = flock_lock_file_wait(file, fl); |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 669 | gfs2_assert_warn(GFS2_SB(&ip->i_inode), !error); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 670 | } |
| 671 | |
Steven Whitehouse | 420b9e5 | 2006-07-31 15:42:17 -0400 | [diff] [blame] | 672 | out: |
Steven Whitehouse | f55ab26 | 2006-02-21 12:51:39 +0000 | [diff] [blame] | 673 | mutex_unlock(&fp->f_fl_mutex); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 674 | return error; |
| 675 | } |
| 676 | |
| 677 | static void do_unflock(struct file *file, struct file_lock *fl) |
| 678 | { |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 679 | struct gfs2_file *fp = file->private_data; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 680 | struct gfs2_holder *fl_gh = &fp->f_fl_gh; |
| 681 | |
Steven Whitehouse | f55ab26 | 2006-02-21 12:51:39 +0000 | [diff] [blame] | 682 | mutex_lock(&fp->f_fl_mutex); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 683 | flock_lock_file_wait(file, fl); |
| 684 | if (fl_gh->gh_gl) |
| 685 | gfs2_glock_dq_uninit(fl_gh); |
Steven Whitehouse | f55ab26 | 2006-02-21 12:51:39 +0000 | [diff] [blame] | 686 | mutex_unlock(&fp->f_fl_mutex); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 687 | } |
| 688 | |
| 689 | /** |
| 690 | * gfs2_flock - acquire/release a flock lock on a file |
| 691 | * @file: the file pointer |
| 692 | * @cmd: either modify or retrieve lock state, possibly wait |
| 693 | * @fl: type and range of lock |
| 694 | * |
| 695 | * Returns: errno |
| 696 | */ |
| 697 | |
| 698 | static int gfs2_flock(struct file *file, int cmd, struct file_lock *fl) |
| 699 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 700 | struct gfs2_inode *ip = GFS2_I(file->f_mapping->host); |
| 701 | struct gfs2_sbd *sdp = GFS2_SB(file->f_mapping->host); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 702 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 703 | if (!(fl->fl_flags & FL_FLOCK)) |
| 704 | return -ENOLCK; |
Pavel Emelyanov | 7afaac6 | 2007-10-01 14:41:13 -0700 | [diff] [blame] | 705 | if (__mandatory_lock(&ip->i_inode)) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 706 | return -ENOLCK; |
| 707 | |
| 708 | if (sdp->sd_args.ar_localflocks) |
| 709 | return flock_lock_file_wait(file, fl); |
| 710 | |
| 711 | if (fl->fl_type == F_UNLCK) { |
| 712 | do_unflock(file, fl); |
| 713 | return 0; |
Steven Whitehouse | d00223f | 2006-10-02 10:28:05 -0400 | [diff] [blame] | 714 | } else { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 715 | return do_flock(file, cmd, fl); |
Steven Whitehouse | d00223f | 2006-10-02 10:28:05 -0400 | [diff] [blame] | 716 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 717 | } |
| 718 | |
Steven Whitehouse | b0dd930 | 2006-07-03 13:47:02 -0400 | [diff] [blame] | 719 | const struct file_operations gfs2_file_fops = { |
Steven Whitehouse | 26c1a57 | 2006-09-04 15:32:10 -0400 | [diff] [blame] | 720 | .llseek = gfs2_llseek, |
Steven Whitehouse | d00223f | 2006-10-02 10:28:05 -0400 | [diff] [blame] | 721 | .read = do_sync_read, |
Steven Whitehouse | 26c1a57 | 2006-09-04 15:32:10 -0400 | [diff] [blame] | 722 | .aio_read = generic_file_aio_read, |
Steven Whitehouse | d00223f | 2006-10-02 10:28:05 -0400 | [diff] [blame] | 723 | .write = do_sync_write, |
Steven Whitehouse | 26c1a57 | 2006-09-04 15:32:10 -0400 | [diff] [blame] | 724 | .aio_write = generic_file_aio_write, |
| 725 | .unlocked_ioctl = gfs2_ioctl, |
| 726 | .mmap = gfs2_mmap, |
| 727 | .open = gfs2_open, |
| 728 | .release = gfs2_close, |
| 729 | .fsync = gfs2_fsync, |
| 730 | .lock = gfs2_lock, |
Steven Whitehouse | 26c1a57 | 2006-09-04 15:32:10 -0400 | [diff] [blame] | 731 | .flock = gfs2_flock, |
| 732 | .splice_read = generic_file_splice_read, |
| 733 | .splice_write = generic_file_splice_write, |
Marc Eshel | 6044606 | 2007-01-15 18:33:36 -0500 | [diff] [blame] | 734 | .setlease = gfs2_setlease, |
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_dir_fops = { |
Steven Whitehouse | 26c1a57 | 2006-09-04 15:32:10 -0400 | [diff] [blame] | 738 | .readdir = gfs2_readdir, |
| 739 | .unlocked_ioctl = gfs2_ioctl, |
| 740 | .open = gfs2_open, |
| 741 | .release = gfs2_close, |
| 742 | .fsync = gfs2_fsync, |
| 743 | .lock = gfs2_lock, |
| 744 | .flock = gfs2_flock, |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 745 | }; |
| 746 | |