Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 2 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. |
| 3 | * All Rights Reserved. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 5 | * This program is free software; you can redistribute it and/or |
| 6 | * modify it under the terms of the GNU General Public License as |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * published by the Free Software Foundation. |
| 8 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 9 | * This program is distributed in the hope that it would be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write the Free Software Foundation, |
| 16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include "xfs.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 19 | #include "xfs_bit.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #include "xfs_log.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 21 | #include "xfs_inum.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include "xfs_sb.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 23 | #include "xfs_ag.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include "xfs_dir2.h" |
| 25 | #include "xfs_trans.h" |
| 26 | #include "xfs_dmapi.h" |
| 27 | #include "xfs_mount.h" |
| 28 | #include "xfs_bmap_btree.h" |
| 29 | #include "xfs_alloc_btree.h" |
| 30 | #include "xfs_ialloc_btree.h" |
| 31 | #include "xfs_alloc.h" |
| 32 | #include "xfs_btree.h" |
| 33 | #include "xfs_attr_sf.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | #include "xfs_dir2_sf.h" |
| 35 | #include "xfs_dinode.h" |
| 36 | #include "xfs_inode.h" |
| 37 | #include "xfs_error.h" |
| 38 | #include "xfs_rw.h" |
| 39 | #include "xfs_ioctl32.h" |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 40 | #include "xfs_vnodeops.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | |
| 42 | #include <linux/dcache.h> |
| 43 | #include <linux/smp_lock.h> |
| 44 | |
Nathan Scott | 3562fd4 | 2006-03-14 14:00:35 +1100 | [diff] [blame] | 45 | static struct vm_operations_struct xfs_file_vm_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | |
David Chinner | 7989cb8 | 2007-02-10 18:34:56 +1100 | [diff] [blame] | 47 | STATIC_INLINE ssize_t |
Nathan Scott | 3562fd4 | 2006-03-14 14:00:35 +1100 | [diff] [blame] | 48 | __xfs_file_read( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | struct kiocb *iocb, |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 50 | const struct iovec *iov, |
| 51 | unsigned long nr_segs, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | int ioflags, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | loff_t pos) |
| 54 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | struct file *file = iocb->ki_filp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | |
| 57 | BUG_ON(iocb->ki_pos != pos); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | if (unlikely(file->f_flags & O_DIRECT)) |
| 59 | ioflags |= IO_ISDIRECT; |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 60 | return xfs_read(XFS_I(file->f_path.dentry->d_inode), iocb, iov, |
| 61 | nr_segs, &iocb->ki_pos, ioflags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | } |
| 63 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | STATIC ssize_t |
Nathan Scott | 3562fd4 | 2006-03-14 14:00:35 +1100 | [diff] [blame] | 65 | xfs_file_aio_read( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | struct kiocb *iocb, |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 67 | const struct iovec *iov, |
| 68 | unsigned long nr_segs, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | loff_t pos) |
| 70 | { |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 71 | return __xfs_file_read(iocb, iov, nr_segs, IO_ISAIO, pos); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | } |
| 73 | |
| 74 | STATIC ssize_t |
Nathan Scott | 3562fd4 | 2006-03-14 14:00:35 +1100 | [diff] [blame] | 75 | xfs_file_aio_read_invis( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | struct kiocb *iocb, |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 77 | const struct iovec *iov, |
| 78 | unsigned long nr_segs, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | loff_t pos) |
| 80 | { |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 81 | return __xfs_file_read(iocb, iov, nr_segs, IO_ISAIO|IO_INVIS, pos); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | } |
| 83 | |
David Chinner | 7989cb8 | 2007-02-10 18:34:56 +1100 | [diff] [blame] | 84 | STATIC_INLINE ssize_t |
Nathan Scott | 3562fd4 | 2006-03-14 14:00:35 +1100 | [diff] [blame] | 85 | __xfs_file_write( |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 86 | struct kiocb *iocb, |
| 87 | const struct iovec *iov, |
| 88 | unsigned long nr_segs, |
| 89 | int ioflags, |
| 90 | loff_t pos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | struct file *file = iocb->ki_filp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | |
| 94 | BUG_ON(iocb->ki_pos != pos); |
| 95 | if (unlikely(file->f_flags & O_DIRECT)) |
| 96 | ioflags |= IO_ISDIRECT; |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 97 | return xfs_write(XFS_I(file->f_mapping->host), iocb, iov, nr_segs, |
| 98 | &iocb->ki_pos, ioflags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | } |
| 100 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | STATIC ssize_t |
Nathan Scott | 3562fd4 | 2006-03-14 14:00:35 +1100 | [diff] [blame] | 102 | xfs_file_aio_write( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | struct kiocb *iocb, |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 104 | const struct iovec *iov, |
| 105 | unsigned long nr_segs, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | loff_t pos) |
| 107 | { |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 108 | return __xfs_file_write(iocb, iov, nr_segs, IO_ISAIO, pos); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | } |
| 110 | |
| 111 | STATIC ssize_t |
Nathan Scott | 3562fd4 | 2006-03-14 14:00:35 +1100 | [diff] [blame] | 112 | xfs_file_aio_write_invis( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | struct kiocb *iocb, |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 114 | const struct iovec *iov, |
| 115 | unsigned long nr_segs, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | loff_t pos) |
| 117 | { |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 118 | return __xfs_file_write(iocb, iov, nr_segs, IO_ISAIO|IO_INVIS, pos); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | } |
| 120 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | STATIC ssize_t |
Nathan Scott | 1b89584 | 2006-03-31 13:08:59 +1000 | [diff] [blame] | 122 | xfs_file_splice_read( |
| 123 | struct file *infilp, |
Jens Axboe | cbb7e57 | 2006-04-11 14:57:50 +0200 | [diff] [blame] | 124 | loff_t *ppos, |
Ingo Molnar | 3a326a2 | 2006-04-10 15:18:35 +0200 | [diff] [blame] | 125 | struct pipe_inode_info *pipe, |
Nathan Scott | 1b89584 | 2006-03-31 13:08:59 +1000 | [diff] [blame] | 126 | size_t len, |
| 127 | unsigned int flags) |
| 128 | { |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 129 | return xfs_splice_read(XFS_I(infilp->f_path.dentry->d_inode), |
| 130 | infilp, ppos, pipe, len, flags, 0); |
Nathan Scott | 1b89584 | 2006-03-31 13:08:59 +1000 | [diff] [blame] | 131 | } |
| 132 | |
| 133 | STATIC ssize_t |
| 134 | xfs_file_splice_read_invis( |
| 135 | struct file *infilp, |
Jens Axboe | cbb7e57 | 2006-04-11 14:57:50 +0200 | [diff] [blame] | 136 | loff_t *ppos, |
Ingo Molnar | 3a326a2 | 2006-04-10 15:18:35 +0200 | [diff] [blame] | 137 | struct pipe_inode_info *pipe, |
Nathan Scott | 1b89584 | 2006-03-31 13:08:59 +1000 | [diff] [blame] | 138 | size_t len, |
| 139 | unsigned int flags) |
| 140 | { |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 141 | return xfs_splice_read(XFS_I(infilp->f_path.dentry->d_inode), |
| 142 | infilp, ppos, pipe, len, flags, IO_INVIS); |
Nathan Scott | 1b89584 | 2006-03-31 13:08:59 +1000 | [diff] [blame] | 143 | } |
| 144 | |
| 145 | STATIC ssize_t |
| 146 | xfs_file_splice_write( |
Ingo Molnar | 3a326a2 | 2006-04-10 15:18:35 +0200 | [diff] [blame] | 147 | struct pipe_inode_info *pipe, |
Nathan Scott | 1b89584 | 2006-03-31 13:08:59 +1000 | [diff] [blame] | 148 | struct file *outfilp, |
Jens Axboe | cbb7e57 | 2006-04-11 14:57:50 +0200 | [diff] [blame] | 149 | loff_t *ppos, |
Nathan Scott | 1b89584 | 2006-03-31 13:08:59 +1000 | [diff] [blame] | 150 | size_t len, |
| 151 | unsigned int flags) |
| 152 | { |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 153 | return xfs_splice_write(XFS_I(outfilp->f_path.dentry->d_inode), |
| 154 | pipe, outfilp, ppos, len, flags, 0); |
Nathan Scott | 1b89584 | 2006-03-31 13:08:59 +1000 | [diff] [blame] | 155 | } |
| 156 | |
| 157 | STATIC ssize_t |
| 158 | xfs_file_splice_write_invis( |
Ingo Molnar | 3a326a2 | 2006-04-10 15:18:35 +0200 | [diff] [blame] | 159 | struct pipe_inode_info *pipe, |
Nathan Scott | 1b89584 | 2006-03-31 13:08:59 +1000 | [diff] [blame] | 160 | struct file *outfilp, |
Jens Axboe | cbb7e57 | 2006-04-11 14:57:50 +0200 | [diff] [blame] | 161 | loff_t *ppos, |
Nathan Scott | 1b89584 | 2006-03-31 13:08:59 +1000 | [diff] [blame] | 162 | size_t len, |
| 163 | unsigned int flags) |
| 164 | { |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 165 | return xfs_splice_write(XFS_I(outfilp->f_path.dentry->d_inode), |
| 166 | pipe, outfilp, ppos, len, flags, IO_INVIS); |
Nathan Scott | 1b89584 | 2006-03-31 13:08:59 +1000 | [diff] [blame] | 167 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | |
| 169 | STATIC int |
Nathan Scott | 3562fd4 | 2006-03-14 14:00:35 +1100 | [diff] [blame] | 170 | xfs_file_open( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | struct inode *inode, |
| 172 | struct file *filp) |
| 173 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | if (!(filp->f_flags & O_LARGEFILE) && i_size_read(inode) > MAX_NON_LFS) |
| 175 | return -EFBIG; |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 176 | return -xfs_open(XFS_I(inode)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | } |
| 178 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | STATIC int |
Nathan Scott | 3562fd4 | 2006-03-14 14:00:35 +1100 | [diff] [blame] | 180 | xfs_file_release( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | struct inode *inode, |
| 182 | struct file *filp) |
| 183 | { |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 184 | return -xfs_release(XFS_I(inode)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | } |
| 186 | |
David Chinner | 978b723 | 2008-05-19 16:29:46 +1000 | [diff] [blame] | 187 | /* |
| 188 | * We ignore the datasync flag here because a datasync is effectively |
| 189 | * identical to an fsync. That is, datasync implies that we need to write |
| 190 | * only the metadata needed to be able to access the data that is written |
| 191 | * if we crash after the call completes. Hence if we are writing beyond |
| 192 | * EOF we have to log the inode size change as well, which makes it a |
| 193 | * full fsync. If we don't write beyond EOF, the inode core will be |
| 194 | * clean in memory and so we don't need to log the inode, just like |
| 195 | * fsync. |
| 196 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | STATIC int |
Nathan Scott | 3562fd4 | 2006-03-14 14:00:35 +1100 | [diff] [blame] | 198 | xfs_file_fsync( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | struct file *filp, |
| 200 | struct dentry *dentry, |
| 201 | int datasync) |
| 202 | { |
Christoph Hellwig | b3aea4e | 2007-08-29 11:44:37 +1000 | [diff] [blame] | 203 | xfs_iflags_clear(XFS_I(dentry->d_inode), XFS_ITRUNCATED); |
David Chinner | 978b723 | 2008-05-19 16:29:46 +1000 | [diff] [blame] | 204 | return -xfs_fsync(XFS_I(dentry->d_inode)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | } |
| 206 | |
Christoph Hellwig | e89bc61 | 2007-12-07 14:07:53 +1100 | [diff] [blame] | 207 | /* |
| 208 | * Unfortunately we can't just use the clean and simple readdir implementation |
| 209 | * below, because nfs might call back into ->lookup from the filldir callback |
| 210 | * and that will deadlock the low-level btree code. |
| 211 | * |
| 212 | * Hopefully we'll find a better workaround that allows to use the optimal |
| 213 | * version at least for local readdirs for 2.6.25. |
| 214 | */ |
| 215 | #if 0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | STATIC int |
Nathan Scott | 3562fd4 | 2006-03-14 14:00:35 +1100 | [diff] [blame] | 217 | xfs_file_readdir( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | struct file *filp, |
| 219 | void *dirent, |
| 220 | filldir_t filldir) |
| 221 | { |
Christoph Hellwig | 051e7cd | 2007-08-28 13:58:24 +1000 | [diff] [blame] | 222 | struct inode *inode = filp->f_path.dentry->d_inode; |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 223 | xfs_inode_t *ip = XFS_I(inode); |
Christoph Hellwig | 051e7cd | 2007-08-28 13:58:24 +1000 | [diff] [blame] | 224 | int error; |
| 225 | size_t bufsize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | |
Christoph Hellwig | 051e7cd | 2007-08-28 13:58:24 +1000 | [diff] [blame] | 227 | /* |
| 228 | * The Linux API doesn't pass down the total size of the buffer |
| 229 | * we read into down to the filesystem. With the filldir concept |
| 230 | * it's not needed for correct information, but the XFS dir2 leaf |
| 231 | * code wants an estimate of the buffer size to calculate it's |
| 232 | * readahead window and size the buffers used for mapping to |
| 233 | * physical blocks. |
| 234 | * |
| 235 | * Try to give it an estimate that's good enough, maybe at some |
| 236 | * point we can change the ->readdir prototype to include the |
| 237 | * buffer size. |
| 238 | */ |
| 239 | bufsize = (size_t)min_t(loff_t, PAGE_SIZE, inode->i_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 241 | error = xfs_readdir(ip, dirent, bufsize, |
Christoph Hellwig | 051e7cd | 2007-08-28 13:58:24 +1000 | [diff] [blame] | 242 | (xfs_off_t *)&filp->f_pos, filldir); |
| 243 | if (error) |
| 244 | return -error; |
| 245 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | } |
Christoph Hellwig | e89bc61 | 2007-12-07 14:07:53 +1100 | [diff] [blame] | 247 | #else |
| 248 | |
| 249 | struct hack_dirent { |
Christoph Hellwig | e89bc61 | 2007-12-07 14:07:53 +1100 | [diff] [blame] | 250 | u64 ino; |
Christoph Hellwig | aea6ad0 | 2008-01-10 16:43:26 +1100 | [diff] [blame] | 251 | loff_t offset; |
| 252 | int namlen; |
Christoph Hellwig | e89bc61 | 2007-12-07 14:07:53 +1100 | [diff] [blame] | 253 | unsigned int d_type; |
| 254 | char name[]; |
| 255 | }; |
| 256 | |
| 257 | struct hack_callback { |
| 258 | char *dirent; |
| 259 | size_t len; |
| 260 | size_t used; |
| 261 | }; |
| 262 | |
| 263 | STATIC int |
| 264 | xfs_hack_filldir( |
| 265 | void *__buf, |
| 266 | const char *name, |
| 267 | int namlen, |
| 268 | loff_t offset, |
| 269 | u64 ino, |
| 270 | unsigned int d_type) |
| 271 | { |
| 272 | struct hack_callback *buf = __buf; |
| 273 | struct hack_dirent *de = (struct hack_dirent *)(buf->dirent + buf->used); |
Christoph Hellwig | aea6ad0 | 2008-01-10 16:43:26 +1100 | [diff] [blame] | 274 | unsigned int reclen; |
Christoph Hellwig | e89bc61 | 2007-12-07 14:07:53 +1100 | [diff] [blame] | 275 | |
Christoph Hellwig | aea6ad0 | 2008-01-10 16:43:26 +1100 | [diff] [blame] | 276 | reclen = ALIGN(sizeof(struct hack_dirent) + namlen, sizeof(u64)); |
| 277 | if (buf->used + reclen > buf->len) |
Christoph Hellwig | e89bc61 | 2007-12-07 14:07:53 +1100 | [diff] [blame] | 278 | return -EINVAL; |
| 279 | |
| 280 | de->namlen = namlen; |
| 281 | de->offset = offset; |
| 282 | de->ino = ino; |
| 283 | de->d_type = d_type; |
| 284 | memcpy(de->name, name, namlen); |
Christoph Hellwig | aea6ad0 | 2008-01-10 16:43:26 +1100 | [diff] [blame] | 285 | buf->used += reclen; |
Christoph Hellwig | e89bc61 | 2007-12-07 14:07:53 +1100 | [diff] [blame] | 286 | return 0; |
| 287 | } |
| 288 | |
| 289 | STATIC int |
| 290 | xfs_file_readdir( |
| 291 | struct file *filp, |
| 292 | void *dirent, |
| 293 | filldir_t filldir) |
| 294 | { |
| 295 | struct inode *inode = filp->f_path.dentry->d_inode; |
| 296 | xfs_inode_t *ip = XFS_I(inode); |
| 297 | struct hack_callback buf; |
| 298 | struct hack_dirent *de; |
| 299 | int error; |
| 300 | loff_t size; |
| 301 | int eof = 0; |
| 302 | xfs_off_t start_offset, curr_offset, offset; |
| 303 | |
| 304 | /* |
| 305 | * Try fairly hard to get memory |
| 306 | */ |
| 307 | buf.len = PAGE_CACHE_SIZE; |
| 308 | do { |
| 309 | buf.dirent = kmalloc(buf.len, GFP_KERNEL); |
| 310 | if (buf.dirent) |
| 311 | break; |
| 312 | buf.len >>= 1; |
| 313 | } while (buf.len >= 1024); |
| 314 | |
| 315 | if (!buf.dirent) |
| 316 | return -ENOMEM; |
| 317 | |
| 318 | curr_offset = filp->f_pos; |
| 319 | if (curr_offset == 0x7fffffff) |
| 320 | offset = 0xffffffff; |
| 321 | else |
| 322 | offset = filp->f_pos; |
| 323 | |
| 324 | while (!eof) { |
Christoph Hellwig | aea6ad0 | 2008-01-10 16:43:26 +1100 | [diff] [blame] | 325 | unsigned int reclen; |
| 326 | |
Christoph Hellwig | e89bc61 | 2007-12-07 14:07:53 +1100 | [diff] [blame] | 327 | start_offset = offset; |
| 328 | |
| 329 | buf.used = 0; |
| 330 | error = -xfs_readdir(ip, &buf, buf.len, &offset, |
| 331 | xfs_hack_filldir); |
| 332 | if (error || offset == start_offset) { |
| 333 | size = 0; |
| 334 | break; |
| 335 | } |
| 336 | |
| 337 | size = buf.used; |
| 338 | de = (struct hack_dirent *)buf.dirent; |
| 339 | while (size > 0) { |
David Chinner | 450790a | 2008-02-06 13:37:40 +1100 | [diff] [blame] | 340 | curr_offset = de->offset /* & 0x7fffffff */; |
Christoph Hellwig | e89bc61 | 2007-12-07 14:07:53 +1100 | [diff] [blame] | 341 | if (filldir(dirent, de->name, de->namlen, |
| 342 | curr_offset & 0x7fffffff, |
| 343 | de->ino, de->d_type)) { |
| 344 | goto done; |
| 345 | } |
| 346 | |
Christoph Hellwig | aea6ad0 | 2008-01-10 16:43:26 +1100 | [diff] [blame] | 347 | reclen = ALIGN(sizeof(struct hack_dirent) + de->namlen, |
| 348 | sizeof(u64)); |
Christoph Hellwig | e89bc61 | 2007-12-07 14:07:53 +1100 | [diff] [blame] | 349 | size -= reclen; |
Christoph Hellwig | e89bc61 | 2007-12-07 14:07:53 +1100 | [diff] [blame] | 350 | de = (struct hack_dirent *)((char *)de + reclen); |
| 351 | } |
| 352 | } |
| 353 | |
| 354 | done: |
Lachlan McIlroy | 041388b | 2007-12-18 16:19:34 +1100 | [diff] [blame] | 355 | if (!error) { |
Christoph Hellwig | e89bc61 | 2007-12-07 14:07:53 +1100 | [diff] [blame] | 356 | if (size == 0) |
| 357 | filp->f_pos = offset & 0x7fffffff; |
| 358 | else if (de) |
| 359 | filp->f_pos = curr_offset; |
| 360 | } |
| 361 | |
| 362 | kfree(buf.dirent); |
| 363 | return error; |
| 364 | } |
| 365 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | STATIC int |
Nathan Scott | 3562fd4 | 2006-03-14 14:00:35 +1100 | [diff] [blame] | 368 | xfs_file_mmap( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | struct file *filp, |
| 370 | struct vm_area_struct *vma) |
| 371 | { |
Nathan Scott | 3562fd4 | 2006-03-14 14:00:35 +1100 | [diff] [blame] | 372 | vma->vm_ops = &xfs_file_vm_ops; |
Nick Piggin | d0217ac | 2007-07-19 01:47:03 -0700 | [diff] [blame] | 373 | vma->vm_flags |= VM_CAN_NONLINEAR; |
Dean Roehrich | 6fac0cb | 2005-06-21 14:07:45 +1000 | [diff] [blame] | 374 | |
Nathan Scott | fbc1462 | 2006-06-09 14:52:13 +1000 | [diff] [blame] | 375 | file_accessed(filp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | return 0; |
| 377 | } |
| 378 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | STATIC long |
Nathan Scott | 3562fd4 | 2006-03-14 14:00:35 +1100 | [diff] [blame] | 380 | xfs_file_ioctl( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | struct file *filp, |
| 382 | unsigned int cmd, |
Nathan Scott | 67fcaa7 | 2006-06-09 17:00:52 +1000 | [diff] [blame] | 383 | unsigned long p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | { |
| 385 | int error; |
Josef "Jeff" Sipek | e678fb0 | 2006-12-08 02:36:49 -0800 | [diff] [blame] | 386 | struct inode *inode = filp->f_path.dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 388 | error = xfs_ioctl(XFS_I(inode), filp, 0, cmd, (void __user *)p); |
Christoph Hellwig | b3aea4e | 2007-08-29 11:44:37 +1000 | [diff] [blame] | 389 | xfs_iflags_set(XFS_I(inode), XFS_IMODIFIED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | |
| 391 | /* NOTE: some of the ioctl's return positive #'s as a |
| 392 | * byte count indicating success, such as |
| 393 | * readlink_by_handle. So we don't "sign flip" |
| 394 | * like most other routines. This means true |
| 395 | * errors need to be returned as a negative value. |
| 396 | */ |
| 397 | return error; |
| 398 | } |
| 399 | |
| 400 | STATIC long |
Nathan Scott | 3562fd4 | 2006-03-14 14:00:35 +1100 | [diff] [blame] | 401 | xfs_file_ioctl_invis( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | struct file *filp, |
| 403 | unsigned int cmd, |
Nathan Scott | 67fcaa7 | 2006-06-09 17:00:52 +1000 | [diff] [blame] | 404 | unsigned long p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | { |
Nathan Scott | 1b89584 | 2006-03-31 13:08:59 +1000 | [diff] [blame] | 406 | int error; |
Josef "Jeff" Sipek | e678fb0 | 2006-12-08 02:36:49 -0800 | [diff] [blame] | 407 | struct inode *inode = filp->f_path.dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 409 | error = xfs_ioctl(XFS_I(inode), filp, IO_INVIS, cmd, (void __user *)p); |
Christoph Hellwig | b3aea4e | 2007-08-29 11:44:37 +1000 | [diff] [blame] | 410 | xfs_iflags_set(XFS_I(inode), XFS_IMODIFIED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | |
| 412 | /* NOTE: some of the ioctl's return positive #'s as a |
| 413 | * byte count indicating success, such as |
| 414 | * readlink_by_handle. So we don't "sign flip" |
| 415 | * like most other routines. This means true |
| 416 | * errors need to be returned as a negative value. |
| 417 | */ |
| 418 | return error; |
| 419 | } |
| 420 | |
David Chinner | 4f57dbc | 2007-07-19 16:28:17 +1000 | [diff] [blame] | 421 | /* |
| 422 | * mmap()d file has taken write protection fault and is being made |
| 423 | * writable. We can set the page state up correctly for a writable |
| 424 | * page, which means we can do correct delalloc accounting (ENOSPC |
| 425 | * checking!) and unwritten extent mapping. |
| 426 | */ |
| 427 | STATIC int |
| 428 | xfs_vm_page_mkwrite( |
| 429 | struct vm_area_struct *vma, |
| 430 | struct page *page) |
| 431 | { |
| 432 | return block_page_mkwrite(vma, page, xfs_get_blocks); |
| 433 | } |
| 434 | |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 435 | const struct file_operations xfs_file_operations = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | .llseek = generic_file_llseek, |
| 437 | .read = do_sync_read, |
Dean Roehrich | bb3f724 | 2005-09-02 15:43:05 +1000 | [diff] [blame] | 438 | .write = do_sync_write, |
Nathan Scott | 3562fd4 | 2006-03-14 14:00:35 +1100 | [diff] [blame] | 439 | .aio_read = xfs_file_aio_read, |
| 440 | .aio_write = xfs_file_aio_write, |
Nathan Scott | 1b89584 | 2006-03-31 13:08:59 +1000 | [diff] [blame] | 441 | .splice_read = xfs_file_splice_read, |
| 442 | .splice_write = xfs_file_splice_write, |
Nathan Scott | 3562fd4 | 2006-03-14 14:00:35 +1100 | [diff] [blame] | 443 | .unlocked_ioctl = xfs_file_ioctl, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | #ifdef CONFIG_COMPAT |
Nathan Scott | 3562fd4 | 2006-03-14 14:00:35 +1100 | [diff] [blame] | 445 | .compat_ioctl = xfs_file_compat_ioctl, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | #endif |
Nathan Scott | 3562fd4 | 2006-03-14 14:00:35 +1100 | [diff] [blame] | 447 | .mmap = xfs_file_mmap, |
| 448 | .open = xfs_file_open, |
| 449 | .release = xfs_file_release, |
| 450 | .fsync = xfs_file_fsync, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | #ifdef HAVE_FOP_OPEN_EXEC |
Nathan Scott | 3562fd4 | 2006-03-14 14:00:35 +1100 | [diff] [blame] | 452 | .open_exec = xfs_file_open_exec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | #endif |
| 454 | }; |
| 455 | |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 456 | const struct file_operations xfs_invis_file_operations = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | .llseek = generic_file_llseek, |
| 458 | .read = do_sync_read, |
Dean Roehrich | bb3f724 | 2005-09-02 15:43:05 +1000 | [diff] [blame] | 459 | .write = do_sync_write, |
Nathan Scott | 3562fd4 | 2006-03-14 14:00:35 +1100 | [diff] [blame] | 460 | .aio_read = xfs_file_aio_read_invis, |
| 461 | .aio_write = xfs_file_aio_write_invis, |
Nathan Scott | 1b89584 | 2006-03-31 13:08:59 +1000 | [diff] [blame] | 462 | .splice_read = xfs_file_splice_read_invis, |
| 463 | .splice_write = xfs_file_splice_write_invis, |
Nathan Scott | 3562fd4 | 2006-03-14 14:00:35 +1100 | [diff] [blame] | 464 | .unlocked_ioctl = xfs_file_ioctl_invis, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | #ifdef CONFIG_COMPAT |
Nathan Scott | 3562fd4 | 2006-03-14 14:00:35 +1100 | [diff] [blame] | 466 | .compat_ioctl = xfs_file_compat_invis_ioctl, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | #endif |
Nathan Scott | 3562fd4 | 2006-03-14 14:00:35 +1100 | [diff] [blame] | 468 | .mmap = xfs_file_mmap, |
| 469 | .open = xfs_file_open, |
| 470 | .release = xfs_file_release, |
| 471 | .fsync = xfs_file_fsync, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | }; |
| 473 | |
| 474 | |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 475 | const struct file_operations xfs_dir_file_operations = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | .read = generic_read_dir, |
Nathan Scott | 3562fd4 | 2006-03-14 14:00:35 +1100 | [diff] [blame] | 477 | .readdir = xfs_file_readdir, |
Al Viro | 59af158 | 2008-08-24 07:24:41 -0400 | [diff] [blame^] | 478 | .llseek = generic_file_llseek, |
Nathan Scott | 3562fd4 | 2006-03-14 14:00:35 +1100 | [diff] [blame] | 479 | .unlocked_ioctl = xfs_file_ioctl, |
Nathan Scott | d387039 | 2005-05-06 06:44:46 -0700 | [diff] [blame] | 480 | #ifdef CONFIG_COMPAT |
Nathan Scott | 3562fd4 | 2006-03-14 14:00:35 +1100 | [diff] [blame] | 481 | .compat_ioctl = xfs_file_compat_ioctl, |
Nathan Scott | d387039 | 2005-05-06 06:44:46 -0700 | [diff] [blame] | 482 | #endif |
Nathan Scott | 3562fd4 | 2006-03-14 14:00:35 +1100 | [diff] [blame] | 483 | .fsync = xfs_file_fsync, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | }; |
| 485 | |
Nathan Scott | 3562fd4 | 2006-03-14 14:00:35 +1100 | [diff] [blame] | 486 | static struct vm_operations_struct xfs_file_vm_ops = { |
Nick Piggin | 54cb882 | 2007-07-19 01:46:59 -0700 | [diff] [blame] | 487 | .fault = filemap_fault, |
David Chinner | 4f57dbc | 2007-07-19 16:28:17 +1000 | [diff] [blame] | 488 | .page_mkwrite = xfs_vm_page_mkwrite, |
Dean Roehrich | 6fac0cb | 2005-06-21 14:07:45 +1000 | [diff] [blame] | 489 | }; |