Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/fs/nfs/file.c |
| 3 | * |
| 4 | * Copyright (C) 1992 Rick Sladkey |
| 5 | * |
| 6 | * Changes Copyright (C) 1994 by Florian La Roche |
| 7 | * - Do not copy data too often around in the kernel. |
| 8 | * - In nfs_file_read the return value of kmalloc wasn't checked. |
| 9 | * - Put in a better version of read look-ahead buffering. Original idea |
| 10 | * and implementation by Wai S Kok elekokws@ee.nus.sg. |
| 11 | * |
| 12 | * Expire cache on write to a file by Wai S Kok (Oct 1994). |
| 13 | * |
| 14 | * Total rewrite of read side for new NFS buffer cache.. Linus. |
| 15 | * |
| 16 | * nfs regular file handling functions |
| 17 | */ |
| 18 | |
| 19 | #include <linux/time.h> |
| 20 | #include <linux/kernel.h> |
| 21 | #include <linux/errno.h> |
| 22 | #include <linux/fcntl.h> |
| 23 | #include <linux/stat.h> |
| 24 | #include <linux/nfs_fs.h> |
| 25 | #include <linux/nfs_mount.h> |
| 26 | #include <linux/mm.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include <linux/pagemap.h> |
Alexey Dobriyan | e8edc6e | 2007-05-21 01:22:52 +0400 | [diff] [blame] | 28 | #include <linux/aio.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 29 | #include <linux/gfp.h> |
Trond Myklebust | b608b28 | 2010-07-30 15:31:54 -0400 | [diff] [blame] | 30 | #include <linux/swap.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | |
| 32 | #include <asm/uaccess.h> |
| 33 | #include <asm/system.h> |
| 34 | |
| 35 | #include "delegation.h" |
Trond Myklebust | 94387fb | 2007-07-22 17:09:05 -0400 | [diff] [blame] | 36 | #include "internal.h" |
Chuck Lever | 91d5b47 | 2006-03-20 13:44:14 -0500 | [diff] [blame] | 37 | #include "iostat.h" |
David Howells | 545db45 | 2009-04-03 16:42:44 +0100 | [diff] [blame] | 38 | #include "fscache.h" |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 39 | #include "pnfs.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | |
| 41 | #define NFSDBG_FACILITY NFSDBG_FILE |
| 42 | |
Alexey Dobriyan | f0f37e2 | 2009-09-27 22:29:37 +0400 | [diff] [blame] | 43 | static const struct vm_operations_struct nfs_file_vm_ops; |
Trond Myklebust | 94387fb | 2007-07-22 17:09:05 -0400 | [diff] [blame] | 44 | |
Arjan van de Ven | 92e1d5b | 2007-02-12 00:55:39 -0800 | [diff] [blame] | 45 | const struct inode_operations nfs_file_inode_operations = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | .permission = nfs_permission, |
| 47 | .getattr = nfs_getattr, |
| 48 | .setattr = nfs_setattr, |
| 49 | }; |
| 50 | |
Andreas Gruenbacher | b7fa055 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 51 | #ifdef CONFIG_NFS_V3 |
Arjan van de Ven | 92e1d5b | 2007-02-12 00:55:39 -0800 | [diff] [blame] | 52 | const struct inode_operations nfs3_file_inode_operations = { |
Andreas Gruenbacher | b7fa055 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 53 | .permission = nfs_permission, |
| 54 | .getattr = nfs_getattr, |
| 55 | .setattr = nfs_setattr, |
| 56 | .listxattr = nfs3_listxattr, |
| 57 | .getxattr = nfs3_getxattr, |
| 58 | .setxattr = nfs3_setxattr, |
| 59 | .removexattr = nfs3_removexattr, |
| 60 | }; |
| 61 | #endif /* CONFIG_NFS_v3 */ |
| 62 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | /* Hack for future NFS swap support */ |
| 64 | #ifndef IS_SWAPFILE |
| 65 | # define IS_SWAPFILE(inode) (0) |
| 66 | #endif |
| 67 | |
| 68 | static int nfs_check_flags(int flags) |
| 69 | { |
| 70 | if ((flags & (O_APPEND | O_DIRECT)) == (O_APPEND | O_DIRECT)) |
| 71 | return -EINVAL; |
| 72 | |
| 73 | return 0; |
| 74 | } |
| 75 | |
| 76 | /* |
| 77 | * Open file |
| 78 | */ |
| 79 | static int |
| 80 | nfs_file_open(struct inode *inode, struct file *filp) |
| 81 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | int res; |
| 83 | |
Chuck Lever | 6da24bc | 2008-06-11 17:55:58 -0400 | [diff] [blame] | 84 | dprintk("NFS: open file(%s/%s)\n", |
Chuck Lever | cc0dd2d | 2008-06-11 17:55:42 -0400 | [diff] [blame] | 85 | filp->f_path.dentry->d_parent->d_name.name, |
| 86 | filp->f_path.dentry->d_name.name); |
| 87 | |
Chuck Lever | c2459dc | 2010-02-01 14:17:14 -0500 | [diff] [blame] | 88 | nfs_inc_stats(inode, NFSIOS_VFSOPEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | res = nfs_check_flags(filp->f_flags); |
| 90 | if (res) |
| 91 | return res; |
| 92 | |
Trond Myklebust | 46cb650 | 2008-06-11 16:32:46 -0400 | [diff] [blame] | 93 | res = nfs_open(inode, filp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | return res; |
| 95 | } |
| 96 | |
| 97 | static int |
| 98 | nfs_file_release(struct inode *inode, struct file *filp) |
| 99 | { |
Chuck Lever | 6da24bc | 2008-06-11 17:55:58 -0400 | [diff] [blame] | 100 | dprintk("NFS: release(%s/%s)\n", |
Rakib Mullick | 6f276e4 | 2011-11-01 12:16:15 +0600 | [diff] [blame] | 101 | filp->f_path.dentry->d_parent->d_name.name, |
| 102 | filp->f_path.dentry->d_name.name); |
Chuck Lever | 6da24bc | 2008-06-11 17:55:58 -0400 | [diff] [blame] | 103 | |
Chuck Lever | 91d5b47 | 2006-03-20 13:44:14 -0500 | [diff] [blame] | 104 | nfs_inc_stats(inode, NFSIOS_VFSRELEASE); |
Trond Myklebust | 46cb650 | 2008-06-11 16:32:46 -0400 | [diff] [blame] | 105 | return nfs_release(inode, filp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | } |
| 107 | |
Trond Myklebust | 980802e | 2005-06-13 11:14:01 -0400 | [diff] [blame] | 108 | /** |
| 109 | * nfs_revalidate_size - Revalidate the file size |
| 110 | * @inode - pointer to inode struct |
| 111 | * @file - pointer to struct file |
| 112 | * |
| 113 | * Revalidates the file length. This is basically a wrapper around |
| 114 | * nfs_revalidate_inode() that takes into account the fact that we may |
| 115 | * have cached writes (in which case we don't care about the server's |
| 116 | * idea of what the file length is), or O_DIRECT (in which case we |
| 117 | * shouldn't trust the cache). |
| 118 | */ |
| 119 | static int nfs_revalidate_file_size(struct inode *inode, struct file *filp) |
| 120 | { |
| 121 | struct nfs_server *server = NFS_SERVER(inode); |
| 122 | struct nfs_inode *nfsi = NFS_I(inode); |
| 123 | |
Trond Myklebust | d7cf8dd | 2010-04-16 16:42:46 -0400 | [diff] [blame] | 124 | if (nfs_have_delegated_attributes(inode)) |
| 125 | goto out_noreval; |
| 126 | |
Trond Myklebust | 980802e | 2005-06-13 11:14:01 -0400 | [diff] [blame] | 127 | if (filp->f_flags & O_DIRECT) |
| 128 | goto force_reval; |
Trond Myklebust | d7cf8dd | 2010-04-16 16:42:46 -0400 | [diff] [blame] | 129 | if (nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE) |
| 130 | goto force_reval; |
| 131 | if (nfs_attribute_timeout(inode)) |
| 132 | goto force_reval; |
| 133 | out_noreval: |
| 134 | return 0; |
Trond Myklebust | 980802e | 2005-06-13 11:14:01 -0400 | [diff] [blame] | 135 | force_reval: |
| 136 | return __nfs_revalidate_inode(server, inode); |
| 137 | } |
| 138 | |
| 139 | static loff_t nfs_file_llseek(struct file *filp, loff_t offset, int origin) |
| 140 | { |
Chuck Lever | 6da24bc | 2008-06-11 17:55:58 -0400 | [diff] [blame] | 141 | dprintk("NFS: llseek file(%s/%s, %lld, %d)\n", |
Chuck Lever | b84e06c | 2008-06-11 17:55:34 -0400 | [diff] [blame] | 142 | filp->f_path.dentry->d_parent->d_name.name, |
| 143 | filp->f_path.dentry->d_name.name, |
| 144 | offset, origin); |
| 145 | |
Josef Bacik | 06222e4 | 2011-07-18 13:21:38 -0400 | [diff] [blame] | 146 | /* |
| 147 | * origin == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate |
| 148 | * the cached file length |
| 149 | */ |
Trond Myklebust | 6c52961 | 2011-12-15 18:38:10 -0500 | [diff] [blame] | 150 | if (origin != SEEK_SET && origin != SEEK_CUR) { |
Trond Myklebust | 980802e | 2005-06-13 11:14:01 -0400 | [diff] [blame] | 151 | struct inode *inode = filp->f_mapping->host; |
Trond Myklebust | d5e6634 | 2008-09-23 17:28:35 -0400 | [diff] [blame] | 152 | |
Trond Myklebust | 980802e | 2005-06-13 11:14:01 -0400 | [diff] [blame] | 153 | int retval = nfs_revalidate_file_size(inode, filp); |
| 154 | if (retval < 0) |
| 155 | return (loff_t)retval; |
Andi Kleen | 79835a71 | 2011-09-15 16:06:52 -0700 | [diff] [blame] | 156 | } |
Trond Myklebust | d5e6634 | 2008-09-23 17:28:35 -0400 | [diff] [blame] | 157 | |
Andi Kleen | 79835a71 | 2011-09-15 16:06:52 -0700 | [diff] [blame] | 158 | return generic_file_llseek(filp, offset, origin); |
Trond Myklebust | 980802e | 2005-06-13 11:14:01 -0400 | [diff] [blame] | 159 | } |
| 160 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | /* |
| 162 | * Flush all dirty pages, and check for write errors. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | */ |
| 164 | static int |
Miklos Szeredi | 75e1fcc | 2006-06-23 02:05:12 -0700 | [diff] [blame] | 165 | nfs_file_flush(struct file *file, fl_owner_t id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | { |
Chuck Lever | 6da24bc | 2008-06-11 17:55:58 -0400 | [diff] [blame] | 167 | struct dentry *dentry = file->f_path.dentry; |
| 168 | struct inode *inode = dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | |
Chuck Lever | 6da24bc | 2008-06-11 17:55:58 -0400 | [diff] [blame] | 170 | dprintk("NFS: flush(%s/%s)\n", |
| 171 | dentry->d_parent->d_name.name, |
| 172 | dentry->d_name.name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | |
Chuck Lever | c2459dc | 2010-02-01 14:17:14 -0500 | [diff] [blame] | 174 | nfs_inc_stats(inode, NFSIOS_VFSFLUSH); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | if ((file->f_mode & FMODE_WRITE) == 0) |
| 176 | return 0; |
Trond Myklebust | 7b159fc | 2007-07-25 14:09:54 -0400 | [diff] [blame] | 177 | |
Trond Myklebust | 7fe5c39 | 2009-03-19 15:35:50 -0400 | [diff] [blame] | 178 | /* Flush writes to the server and return any errors */ |
Trond Myklebust | af7fa16 | 2010-07-31 14:29:06 -0400 | [diff] [blame] | 179 | return vfs_fsync(file, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | } |
| 181 | |
| 182 | static ssize_t |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 183 | nfs_file_read(struct kiocb *iocb, const struct iovec *iov, |
| 184 | unsigned long nr_segs, loff_t pos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | { |
Josef "Jeff" Sipek | 01cce93 | 2006-12-08 02:36:40 -0800 | [diff] [blame] | 186 | struct dentry * dentry = iocb->ki_filp->f_path.dentry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | struct inode * inode = dentry->d_inode; |
| 188 | ssize_t result; |
| 189 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | if (iocb->ki_filp->f_flags & O_DIRECT) |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 191 | return nfs_file_direct_read(iocb, iov, nr_segs, pos); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | |
Chuck Lever | 6da24bc | 2008-06-11 17:55:58 -0400 | [diff] [blame] | 193 | dprintk("NFS: read(%s/%s, %lu@%lu)\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | dentry->d_parent->d_name.name, dentry->d_name.name, |
Rakib Mullick | 6f276e4 | 2011-11-01 12:16:15 +0600 | [diff] [blame] | 195 | (unsigned long) iov_length(iov, nr_segs), (unsigned long) pos); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 197 | result = nfs_revalidate_mapping(inode, iocb->ki_filp->f_mapping); |
Chuck Lever | 4184dcf | 2010-02-01 14:17:23 -0500 | [diff] [blame] | 198 | if (!result) { |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 199 | result = generic_file_aio_read(iocb, iov, nr_segs, pos); |
Chuck Lever | 4184dcf | 2010-02-01 14:17:23 -0500 | [diff] [blame] | 200 | if (result > 0) |
| 201 | nfs_add_stats(inode, NFSIOS_NORMALREADBYTES, result); |
| 202 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | return result; |
| 204 | } |
| 205 | |
| 206 | static ssize_t |
Jens Axboe | f0930ff | 2007-06-01 11:51:43 +0200 | [diff] [blame] | 207 | nfs_file_splice_read(struct file *filp, loff_t *ppos, |
| 208 | struct pipe_inode_info *pipe, size_t count, |
| 209 | unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | { |
Josef "Jeff" Sipek | 01cce93 | 2006-12-08 02:36:40 -0800 | [diff] [blame] | 211 | struct dentry *dentry = filp->f_path.dentry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | struct inode *inode = dentry->d_inode; |
| 213 | ssize_t res; |
| 214 | |
Chuck Lever | 6da24bc | 2008-06-11 17:55:58 -0400 | [diff] [blame] | 215 | dprintk("NFS: splice_read(%s/%s, %lu@%Lu)\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | dentry->d_parent->d_name.name, dentry->d_name.name, |
| 217 | (unsigned long) count, (unsigned long long) *ppos); |
| 218 | |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 219 | res = nfs_revalidate_mapping(inode, filp->f_mapping); |
Chuck Lever | aa2f1ef | 2010-02-01 14:17:32 -0500 | [diff] [blame] | 220 | if (!res) { |
Jens Axboe | f0930ff | 2007-06-01 11:51:43 +0200 | [diff] [blame] | 221 | res = generic_file_splice_read(filp, ppos, pipe, count, flags); |
Chuck Lever | aa2f1ef | 2010-02-01 14:17:32 -0500 | [diff] [blame] | 222 | if (res > 0) |
| 223 | nfs_add_stats(inode, NFSIOS_NORMALREADBYTES, res); |
| 224 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | return res; |
| 226 | } |
| 227 | |
| 228 | static int |
| 229 | nfs_file_mmap(struct file * file, struct vm_area_struct * vma) |
| 230 | { |
Josef "Jeff" Sipek | 01cce93 | 2006-12-08 02:36:40 -0800 | [diff] [blame] | 231 | struct dentry *dentry = file->f_path.dentry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | struct inode *inode = dentry->d_inode; |
| 233 | int status; |
| 234 | |
Chuck Lever | 6da24bc | 2008-06-11 17:55:58 -0400 | [diff] [blame] | 235 | dprintk("NFS: mmap(%s/%s)\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | dentry->d_parent->d_name.name, dentry->d_name.name); |
| 237 | |
Trond Myklebust | e1ebfd3 | 2009-03-11 14:37:54 -0400 | [diff] [blame] | 238 | /* Note: generic_file_mmap() returns ENOSYS on nommu systems |
| 239 | * so we call that before revalidating the mapping |
| 240 | */ |
| 241 | status = generic_file_mmap(file, vma); |
Trond Myklebust | 94387fb | 2007-07-22 17:09:05 -0400 | [diff] [blame] | 242 | if (!status) { |
| 243 | vma->vm_ops = &nfs_file_vm_ops; |
Trond Myklebust | e1ebfd3 | 2009-03-11 14:37:54 -0400 | [diff] [blame] | 244 | status = nfs_revalidate_mapping(inode, file->f_mapping); |
Trond Myklebust | 94387fb | 2007-07-22 17:09:05 -0400 | [diff] [blame] | 245 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | return status; |
| 247 | } |
| 248 | |
| 249 | /* |
| 250 | * Flush any dirty pages for this process, and check for write errors. |
| 251 | * The return status from this call provides a reliable indication of |
| 252 | * whether any write errors occurred for this process. |
Trond Myklebust | af7fa16 | 2010-07-31 14:29:06 -0400 | [diff] [blame] | 253 | * |
| 254 | * Notice that it clears the NFS_CONTEXT_ERROR_WRITE before synching to |
| 255 | * disk, but it retrieves and clears ctx->error after synching, despite |
| 256 | * the two being set at the same time in nfs_context_set_write_error(). |
| 257 | * This is because the former is used to notify the _next_ call to |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 258 | * nfs_file_write() that a write error occurred, and hence cause it to |
Trond Myklebust | af7fa16 | 2010-07-31 14:29:06 -0400 | [diff] [blame] | 259 | * fall back to doing a synchronous write. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | */ |
| 261 | static int |
Josef Bacik | 02c24a8 | 2011-07-16 20:44:56 -0400 | [diff] [blame] | 262 | nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | { |
Christoph Hellwig | 7ea8085 | 2010-05-26 17:53:25 +0200 | [diff] [blame] | 264 | struct dentry *dentry = file->f_path.dentry; |
Trond Myklebust | cd3758e | 2007-08-10 17:44:32 -0400 | [diff] [blame] | 265 | struct nfs_open_context *ctx = nfs_file_open_context(file); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | struct inode *inode = dentry->d_inode; |
Trond Myklebust | af7fa16 | 2010-07-31 14:29:06 -0400 | [diff] [blame] | 267 | int have_error, status; |
| 268 | int ret = 0; |
| 269 | |
Chuck Lever | 6da24bc | 2008-06-11 17:55:58 -0400 | [diff] [blame] | 270 | dprintk("NFS: fsync file(%s/%s) datasync %d\n", |
Chuck Lever | 5491778 | 2008-05-27 16:29:07 -0400 | [diff] [blame] | 271 | dentry->d_parent->d_name.name, dentry->d_name.name, |
| 272 | datasync); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | |
Josef Bacik | 02c24a8 | 2011-07-16 20:44:56 -0400 | [diff] [blame] | 274 | ret = filemap_write_and_wait_range(inode->i_mapping, start, end); |
Josef Bacik | 02c24a8 | 2011-07-16 20:44:56 -0400 | [diff] [blame] | 275 | mutex_lock(&inode->i_mutex); |
| 276 | |
Chuck Lever | 91d5b47 | 2006-03-20 13:44:14 -0500 | [diff] [blame] | 277 | nfs_inc_stats(inode, NFSIOS_VFSFSYNC); |
Trond Myklebust | af7fa16 | 2010-07-31 14:29:06 -0400 | [diff] [blame] | 278 | have_error = test_and_clear_bit(NFS_CONTEXT_ERROR_WRITE, &ctx->flags); |
| 279 | status = nfs_commit_inode(inode, FLUSH_SYNC); |
NeilBrown | 2edb6bc | 2011-11-16 11:46:31 +1100 | [diff] [blame] | 280 | if (status >= 0 && ret < 0) |
| 281 | status = ret; |
Trond Myklebust | af7fa16 | 2010-07-31 14:29:06 -0400 | [diff] [blame] | 282 | have_error |= test_bit(NFS_CONTEXT_ERROR_WRITE, &ctx->flags); |
| 283 | if (have_error) |
| 284 | ret = xchg(&ctx->error, 0); |
J. R. Okajima | 0702099 | 2010-08-11 13:10:16 -0400 | [diff] [blame] | 285 | if (!ret && status < 0) |
Trond Myklebust | af7fa16 | 2010-07-31 14:29:06 -0400 | [diff] [blame] | 286 | ret = status; |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 287 | if (!ret && !datasync) |
| 288 | /* application has asked for meta-data sync */ |
Andy Adamson | ef31153 | 2011-03-12 02:58:10 -0500 | [diff] [blame] | 289 | ret = pnfs_layoutcommit_inode(inode, true); |
Josef Bacik | 02c24a8 | 2011-07-16 20:44:56 -0400 | [diff] [blame] | 290 | mutex_unlock(&inode->i_mutex); |
Trond Myklebust | af7fa16 | 2010-07-31 14:29:06 -0400 | [diff] [blame] | 291 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | } |
| 293 | |
| 294 | /* |
Peter Staubach | 38c7304 | 2009-08-10 08:54:16 -0400 | [diff] [blame] | 295 | * Decide whether a read/modify/write cycle may be more efficient |
| 296 | * then a modify/write/read cycle when writing to a page in the |
| 297 | * page cache. |
| 298 | * |
| 299 | * The modify/write/read cycle may occur if a page is read before |
| 300 | * being completely filled by the writer. In this situation, the |
| 301 | * page must be completely written to stable storage on the server |
| 302 | * before it can be refilled by reading in the page from the server. |
| 303 | * This can lead to expensive, small, FILE_SYNC mode writes being |
| 304 | * done. |
| 305 | * |
| 306 | * It may be more efficient to read the page first if the file is |
| 307 | * open for reading in addition to writing, the page is not marked |
| 308 | * as Uptodate, it is not dirty or waiting to be committed, |
| 309 | * indicating that it was previously allocated and then modified, |
| 310 | * that there were valid bytes of data in that range of the file, |
| 311 | * and that the new data won't completely replace the old data in |
| 312 | * that range of the file. |
| 313 | */ |
| 314 | static int nfs_want_read_modify_write(struct file *file, struct page *page, |
| 315 | loff_t pos, unsigned len) |
| 316 | { |
| 317 | unsigned int pglen = nfs_page_length(page); |
| 318 | unsigned int offset = pos & (PAGE_CACHE_SIZE - 1); |
| 319 | unsigned int end = offset + len; |
| 320 | |
| 321 | if ((file->f_mode & FMODE_READ) && /* open for read? */ |
| 322 | !PageUptodate(page) && /* Uptodate? */ |
| 323 | !PagePrivate(page) && /* i/o request already? */ |
| 324 | pglen && /* valid bytes of file? */ |
| 325 | (end < pglen || offset)) /* replace all valid bytes? */ |
| 326 | return 1; |
| 327 | return 0; |
| 328 | } |
| 329 | |
| 330 | /* |
Nick Piggin | 4899f9c | 2007-10-16 01:25:16 -0700 | [diff] [blame] | 331 | * This does the "real" work of the write. We must allocate and lock the |
| 332 | * page to be sent back to the generic routine, which then copies the |
| 333 | * data from user space. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | * |
| 335 | * If the writer ends up delaying the write, the writer needs to |
| 336 | * increment the page use counts until he is done with the page. |
| 337 | */ |
Nick Piggin | 4899f9c | 2007-10-16 01:25:16 -0700 | [diff] [blame] | 338 | static int nfs_write_begin(struct file *file, struct address_space *mapping, |
| 339 | loff_t pos, unsigned len, unsigned flags, |
| 340 | struct page **pagep, void **fsdata) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | { |
Nick Piggin | 4899f9c | 2007-10-16 01:25:16 -0700 | [diff] [blame] | 342 | int ret; |
Peter Staubach | 38c7304 | 2009-08-10 08:54:16 -0400 | [diff] [blame] | 343 | pgoff_t index = pos >> PAGE_CACHE_SHIFT; |
Nick Piggin | 4899f9c | 2007-10-16 01:25:16 -0700 | [diff] [blame] | 344 | struct page *page; |
Peter Staubach | 38c7304 | 2009-08-10 08:54:16 -0400 | [diff] [blame] | 345 | int once_thru = 0; |
Nick Piggin | 4899f9c | 2007-10-16 01:25:16 -0700 | [diff] [blame] | 346 | |
Chuck Lever | b7eaefa | 2008-06-11 17:55:50 -0400 | [diff] [blame] | 347 | dfprintk(PAGECACHE, "NFS: write_begin(%s/%s(%ld), %u@%lld)\n", |
| 348 | file->f_path.dentry->d_parent->d_name.name, |
| 349 | file->f_path.dentry->d_name.name, |
| 350 | mapping->host->i_ino, len, (long long) pos); |
| 351 | |
Peter Staubach | 38c7304 | 2009-08-10 08:54:16 -0400 | [diff] [blame] | 352 | start: |
Trond Myklebust | 72cb77f | 2009-03-11 14:10:30 -0400 | [diff] [blame] | 353 | /* |
| 354 | * Prevent starvation issues if someone is doing a consistency |
| 355 | * sync-to-disk |
| 356 | */ |
| 357 | ret = wait_on_bit(&NFS_I(mapping->host)->flags, NFS_INO_FLUSHING, |
| 358 | nfs_wait_bit_killable, TASK_KILLABLE); |
| 359 | if (ret) |
| 360 | return ret; |
| 361 | |
Nick Piggin | 54566b2 | 2009-01-04 12:00:53 -0800 | [diff] [blame] | 362 | page = grab_cache_page_write_begin(mapping, index, flags); |
Nick Piggin | 4899f9c | 2007-10-16 01:25:16 -0700 | [diff] [blame] | 363 | if (!page) |
| 364 | return -ENOMEM; |
| 365 | *pagep = page; |
| 366 | |
| 367 | ret = nfs_flush_incompatible(file, page); |
| 368 | if (ret) { |
| 369 | unlock_page(page); |
| 370 | page_cache_release(page); |
Peter Staubach | 38c7304 | 2009-08-10 08:54:16 -0400 | [diff] [blame] | 371 | } else if (!once_thru && |
| 372 | nfs_want_read_modify_write(file, page, pos, len)) { |
| 373 | once_thru = 1; |
| 374 | ret = nfs_readpage(file, page); |
| 375 | page_cache_release(page); |
| 376 | if (!ret) |
| 377 | goto start; |
Nick Piggin | 4899f9c | 2007-10-16 01:25:16 -0700 | [diff] [blame] | 378 | } |
| 379 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | } |
| 381 | |
Nick Piggin | 4899f9c | 2007-10-16 01:25:16 -0700 | [diff] [blame] | 382 | static int nfs_write_end(struct file *file, struct address_space *mapping, |
| 383 | loff_t pos, unsigned len, unsigned copied, |
| 384 | struct page *page, void *fsdata) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | { |
Nick Piggin | 4899f9c | 2007-10-16 01:25:16 -0700 | [diff] [blame] | 386 | unsigned offset = pos & (PAGE_CACHE_SIZE - 1); |
| 387 | int status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | |
Chuck Lever | b7eaefa | 2008-06-11 17:55:50 -0400 | [diff] [blame] | 389 | dfprintk(PAGECACHE, "NFS: write_end(%s/%s(%ld), %u@%lld)\n", |
| 390 | file->f_path.dentry->d_parent->d_name.name, |
| 391 | file->f_path.dentry->d_name.name, |
| 392 | mapping->host->i_ino, len, (long long) pos); |
| 393 | |
Trond Myklebust | efc91ed | 2008-06-10 18:31:00 -0400 | [diff] [blame] | 394 | /* |
| 395 | * Zero any uninitialised parts of the page, and then mark the page |
| 396 | * as up to date if it turns out that we're extending the file. |
| 397 | */ |
| 398 | if (!PageUptodate(page)) { |
| 399 | unsigned pglen = nfs_page_length(page); |
| 400 | unsigned end = offset + len; |
| 401 | |
| 402 | if (pglen == 0) { |
| 403 | zero_user_segments(page, 0, offset, |
| 404 | end, PAGE_CACHE_SIZE); |
| 405 | SetPageUptodate(page); |
| 406 | } else if (end >= pglen) { |
| 407 | zero_user_segment(page, end, PAGE_CACHE_SIZE); |
| 408 | if (offset == 0) |
| 409 | SetPageUptodate(page); |
| 410 | } else |
| 411 | zero_user_segment(page, pglen, PAGE_CACHE_SIZE); |
| 412 | } |
| 413 | |
Nick Piggin | 4899f9c | 2007-10-16 01:25:16 -0700 | [diff] [blame] | 414 | status = nfs_updatepage(file, page, offset, copied); |
Nick Piggin | 4899f9c | 2007-10-16 01:25:16 -0700 | [diff] [blame] | 415 | |
| 416 | unlock_page(page); |
| 417 | page_cache_release(page); |
| 418 | |
Chuck Lever | 3d509e5 | 2007-12-20 14:55:04 -0500 | [diff] [blame] | 419 | if (status < 0) |
| 420 | return status; |
| 421 | return copied; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | } |
| 423 | |
David Howells | 6b9b351 | 2009-04-03 16:42:41 +0100 | [diff] [blame] | 424 | /* |
| 425 | * Partially or wholly invalidate a page |
| 426 | * - Release the private state associated with a page if undergoing complete |
| 427 | * page invalidation |
David Howells | 545db45 | 2009-04-03 16:42:44 +0100 | [diff] [blame] | 428 | * - Called if either PG_private or PG_fscache is set on the page |
David Howells | 6b9b351 | 2009-04-03 16:42:41 +0100 | [diff] [blame] | 429 | * - Caller holds page lock |
| 430 | */ |
NeilBrown | 2ff28e2 | 2006-03-26 01:37:18 -0800 | [diff] [blame] | 431 | static void nfs_invalidate_page(struct page *page, unsigned long offset) |
Trond Myklebust | cd52ed3 | 2006-03-20 13:44:04 -0500 | [diff] [blame] | 432 | { |
Chuck Lever | b7eaefa | 2008-06-11 17:55:50 -0400 | [diff] [blame] | 433 | dfprintk(PAGECACHE, "NFS: invalidate_page(%p, %lu)\n", page, offset); |
| 434 | |
Trond Myklebust | 1c75950 | 2006-10-09 16:18:38 -0400 | [diff] [blame] | 435 | if (offset != 0) |
| 436 | return; |
Trond Myklebust | d2ccddf | 2006-05-31 01:13:38 -0400 | [diff] [blame] | 437 | /* Cancel any unstarted writes on this page */ |
Trond Myklebust | 1b3b4a1 | 2007-08-28 10:29:36 -0400 | [diff] [blame] | 438 | nfs_wb_page_cancel(page->mapping->host, page); |
David Howells | 545db45 | 2009-04-03 16:42:44 +0100 | [diff] [blame] | 439 | |
| 440 | nfs_fscache_invalidate_page(page, page->mapping->host); |
Trond Myklebust | cd52ed3 | 2006-03-20 13:44:04 -0500 | [diff] [blame] | 441 | } |
| 442 | |
David Howells | 6b9b351 | 2009-04-03 16:42:41 +0100 | [diff] [blame] | 443 | /* |
| 444 | * Attempt to release the private state associated with a page |
David Howells | 545db45 | 2009-04-03 16:42:44 +0100 | [diff] [blame] | 445 | * - Called if either PG_private or PG_fscache is set on the page |
David Howells | 6b9b351 | 2009-04-03 16:42:41 +0100 | [diff] [blame] | 446 | * - Caller holds page lock |
| 447 | * - Return true (may release page) or false (may not) |
| 448 | */ |
Trond Myklebust | cd52ed3 | 2006-03-20 13:44:04 -0500 | [diff] [blame] | 449 | static int nfs_release_page(struct page *page, gfp_t gfp) |
| 450 | { |
Trond Myklebust | b608b28 | 2010-07-30 15:31:54 -0400 | [diff] [blame] | 451 | struct address_space *mapping = page->mapping; |
| 452 | |
Chuck Lever | b7eaefa | 2008-06-11 17:55:50 -0400 | [diff] [blame] | 453 | dfprintk(PAGECACHE, "NFS: release_page(%p)\n", page); |
| 454 | |
Trond Myklebust | d812e57 | 2010-03-19 13:55:17 -0400 | [diff] [blame] | 455 | /* Only do I/O if gfp is a superset of GFP_KERNEL */ |
Trond Myklebust | b608b28 | 2010-07-30 15:31:54 -0400 | [diff] [blame] | 456 | if (mapping && (gfp & GFP_KERNEL) == GFP_KERNEL) { |
| 457 | int how = FLUSH_SYNC; |
| 458 | |
| 459 | /* Don't let kswapd deadlock waiting for OOM RPC calls */ |
| 460 | if (current_is_kswapd()) |
| 461 | how = 0; |
| 462 | nfs_commit_inode(mapping->host, how); |
| 463 | } |
Trond Myklebust | e3db769 | 2007-01-10 23:15:39 -0800 | [diff] [blame] | 464 | /* If PagePrivate() is set, then the page is not freeable */ |
David Howells | 545db45 | 2009-04-03 16:42:44 +0100 | [diff] [blame] | 465 | if (PagePrivate(page)) |
| 466 | return 0; |
| 467 | return nfs_fscache_release_page(page, gfp); |
Trond Myklebust | e3db769 | 2007-01-10 23:15:39 -0800 | [diff] [blame] | 468 | } |
| 469 | |
David Howells | 6b9b351 | 2009-04-03 16:42:41 +0100 | [diff] [blame] | 470 | /* |
| 471 | * Attempt to clear the private state associated with a page when an error |
| 472 | * occurs that requires the cached contents of an inode to be written back or |
| 473 | * destroyed |
David Howells | 545db45 | 2009-04-03 16:42:44 +0100 | [diff] [blame] | 474 | * - Called if either PG_private or fscache is set on the page |
David Howells | 6b9b351 | 2009-04-03 16:42:41 +0100 | [diff] [blame] | 475 | * - Caller holds page lock |
| 476 | * - Return 0 if successful, -error otherwise |
| 477 | */ |
Trond Myklebust | e3db769 | 2007-01-10 23:15:39 -0800 | [diff] [blame] | 478 | static int nfs_launder_page(struct page *page) |
| 479 | { |
Chuck Lever | b7eaefa | 2008-06-11 17:55:50 -0400 | [diff] [blame] | 480 | struct inode *inode = page->mapping->host; |
David Howells | 545db45 | 2009-04-03 16:42:44 +0100 | [diff] [blame] | 481 | struct nfs_inode *nfsi = NFS_I(inode); |
Chuck Lever | b7eaefa | 2008-06-11 17:55:50 -0400 | [diff] [blame] | 482 | |
| 483 | dfprintk(PAGECACHE, "NFS: launder_page(%ld, %llu)\n", |
| 484 | inode->i_ino, (long long)page_offset(page)); |
| 485 | |
David Howells | 545db45 | 2009-04-03 16:42:44 +0100 | [diff] [blame] | 486 | nfs_fscache_wait_on_page_write(nfsi, page); |
Chuck Lever | b7eaefa | 2008-06-11 17:55:50 -0400 | [diff] [blame] | 487 | return nfs_wb_page(inode, page); |
Trond Myklebust | cd52ed3 | 2006-03-20 13:44:04 -0500 | [diff] [blame] | 488 | } |
| 489 | |
Christoph Hellwig | f5e54d6 | 2006-06-28 04:26:44 -0700 | [diff] [blame] | 490 | const struct address_space_operations nfs_file_aops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | .readpage = nfs_readpage, |
| 492 | .readpages = nfs_readpages, |
Trond Myklebust | 9cccef9 | 2007-07-22 17:09:05 -0400 | [diff] [blame] | 493 | .set_page_dirty = __set_page_dirty_nobuffers, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | .writepage = nfs_writepage, |
| 495 | .writepages = nfs_writepages, |
Nick Piggin | 4899f9c | 2007-10-16 01:25:16 -0700 | [diff] [blame] | 496 | .write_begin = nfs_write_begin, |
| 497 | .write_end = nfs_write_end, |
Trond Myklebust | cd52ed3 | 2006-03-20 13:44:04 -0500 | [diff] [blame] | 498 | .invalidatepage = nfs_invalidate_page, |
| 499 | .releasepage = nfs_release_page, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | .direct_IO = nfs_direct_IO, |
Trond Myklebust | 074cc1d | 2009-08-10 08:54:13 -0400 | [diff] [blame] | 501 | .migratepage = nfs_migrate_page, |
Trond Myklebust | e3db769 | 2007-01-10 23:15:39 -0800 | [diff] [blame] | 502 | .launder_page = nfs_launder_page, |
Andi Kleen | f590f33 | 2009-09-16 11:50:17 +0200 | [diff] [blame] | 503 | .error_remove_page = generic_error_remove_page, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | }; |
| 505 | |
David Howells | 6b9b351 | 2009-04-03 16:42:41 +0100 | [diff] [blame] | 506 | /* |
| 507 | * Notification that a PTE pointing to an NFS page is about to be made |
| 508 | * writable, implying that someone is about to modify the page through a |
| 509 | * shared-writable mapping |
| 510 | */ |
Nick Piggin | c2ec175 | 2009-03-31 15:23:21 -0700 | [diff] [blame] | 511 | static int nfs_vm_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) |
Trond Myklebust | 94387fb | 2007-07-22 17:09:05 -0400 | [diff] [blame] | 512 | { |
Nick Piggin | c2ec175 | 2009-03-31 15:23:21 -0700 | [diff] [blame] | 513 | struct page *page = vmf->page; |
Trond Myklebust | 94387fb | 2007-07-22 17:09:05 -0400 | [diff] [blame] | 514 | struct file *filp = vma->vm_file; |
Chuck Lever | b7eaefa | 2008-06-11 17:55:50 -0400 | [diff] [blame] | 515 | struct dentry *dentry = filp->f_path.dentry; |
Trond Myklebust | 94387fb | 2007-07-22 17:09:05 -0400 | [diff] [blame] | 516 | unsigned pagelen; |
Trond Myklebust | bc4866b | 2010-10-04 17:59:08 -0400 | [diff] [blame] | 517 | int ret = VM_FAULT_NOPAGE; |
Nick Piggin | 4899f9c | 2007-10-16 01:25:16 -0700 | [diff] [blame] | 518 | struct address_space *mapping; |
Trond Myklebust | 94387fb | 2007-07-22 17:09:05 -0400 | [diff] [blame] | 519 | |
Chuck Lever | b7eaefa | 2008-06-11 17:55:50 -0400 | [diff] [blame] | 520 | dfprintk(PAGECACHE, "NFS: vm_page_mkwrite(%s/%s(%ld), offset %lld)\n", |
| 521 | dentry->d_parent->d_name.name, dentry->d_name.name, |
| 522 | filp->f_mapping->host->i_ino, |
| 523 | (long long)page_offset(page)); |
| 524 | |
David Howells | 545db45 | 2009-04-03 16:42:44 +0100 | [diff] [blame] | 525 | /* make sure the cache has finished storing the page */ |
| 526 | nfs_fscache_wait_on_page_write(NFS_I(dentry->d_inode), page); |
| 527 | |
Trond Myklebust | 94387fb | 2007-07-22 17:09:05 -0400 | [diff] [blame] | 528 | lock_page(page); |
Nick Piggin | 4899f9c | 2007-10-16 01:25:16 -0700 | [diff] [blame] | 529 | mapping = page->mapping; |
Chuck Lever | b7eaefa | 2008-06-11 17:55:50 -0400 | [diff] [blame] | 530 | if (mapping != dentry->d_inode->i_mapping) |
Trond Myklebust | 8b1f9ee | 2008-01-22 17:13:06 -0500 | [diff] [blame] | 531 | goto out_unlock; |
| 532 | |
Trond Myklebust | 2aeb98f | 2012-01-17 22:04:26 -0500 | [diff] [blame] | 533 | wait_on_page_writeback(page); |
| 534 | |
Trond Myklebust | 94387fb | 2007-07-22 17:09:05 -0400 | [diff] [blame] | 535 | pagelen = nfs_page_length(page); |
Trond Myklebust | 8b1f9ee | 2008-01-22 17:13:06 -0500 | [diff] [blame] | 536 | if (pagelen == 0) |
| 537 | goto out_unlock; |
| 538 | |
Trond Myklebust | bc4866b | 2010-10-04 17:59:08 -0400 | [diff] [blame] | 539 | ret = VM_FAULT_LOCKED; |
| 540 | if (nfs_flush_incompatible(filp, page) == 0 && |
| 541 | nfs_updatepage(filp, page, 0, pagelen) == 0) |
| 542 | goto out; |
Trond Myklebust | 8b1f9ee | 2008-01-22 17:13:06 -0500 | [diff] [blame] | 543 | |
Trond Myklebust | bc4866b | 2010-10-04 17:59:08 -0400 | [diff] [blame] | 544 | ret = VM_FAULT_SIGBUS; |
Trond Myklebust | 8b1f9ee | 2008-01-22 17:13:06 -0500 | [diff] [blame] | 545 | out_unlock: |
Trond Myklebust | 94387fb | 2007-07-22 17:09:05 -0400 | [diff] [blame] | 546 | unlock_page(page); |
Trond Myklebust | bc4866b | 2010-10-04 17:59:08 -0400 | [diff] [blame] | 547 | out: |
| 548 | return ret; |
Trond Myklebust | 94387fb | 2007-07-22 17:09:05 -0400 | [diff] [blame] | 549 | } |
| 550 | |
Alexey Dobriyan | f0f37e2 | 2009-09-27 22:29:37 +0400 | [diff] [blame] | 551 | static const struct vm_operations_struct nfs_file_vm_ops = { |
Trond Myklebust | 94387fb | 2007-07-22 17:09:05 -0400 | [diff] [blame] | 552 | .fault = filemap_fault, |
| 553 | .page_mkwrite = nfs_vm_page_mkwrite, |
| 554 | }; |
| 555 | |
Trond Myklebust | 7b159fc | 2007-07-25 14:09:54 -0400 | [diff] [blame] | 556 | static int nfs_need_sync_write(struct file *filp, struct inode *inode) |
| 557 | { |
| 558 | struct nfs_open_context *ctx; |
| 559 | |
Christoph Hellwig | 6b2f3d1 | 2009-10-27 11:05:28 +0100 | [diff] [blame] | 560 | if (IS_SYNC(inode) || (filp->f_flags & O_DSYNC)) |
Trond Myklebust | 7b159fc | 2007-07-25 14:09:54 -0400 | [diff] [blame] | 561 | return 1; |
Trond Myklebust | cd3758e | 2007-08-10 17:44:32 -0400 | [diff] [blame] | 562 | ctx = nfs_file_open_context(filp); |
Trond Myklebust | 7b159fc | 2007-07-25 14:09:54 -0400 | [diff] [blame] | 563 | if (test_bit(NFS_CONTEXT_ERROR_WRITE, &ctx->flags)) |
| 564 | return 1; |
| 565 | return 0; |
| 566 | } |
| 567 | |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 568 | static ssize_t nfs_file_write(struct kiocb *iocb, const struct iovec *iov, |
| 569 | unsigned long nr_segs, loff_t pos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | { |
Josef "Jeff" Sipek | 01cce93 | 2006-12-08 02:36:40 -0800 | [diff] [blame] | 571 | struct dentry * dentry = iocb->ki_filp->f_path.dentry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | struct inode * inode = dentry->d_inode; |
Chuck Lever | 7e38117 | 2010-02-01 14:17:41 -0500 | [diff] [blame] | 573 | unsigned long written = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | ssize_t result; |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 575 | size_t count = iov_length(iov, nr_segs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 577 | if (iocb->ki_filp->f_flags & O_DIRECT) |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 578 | return nfs_file_direct_write(iocb, iov, nr_segs, pos); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | |
Chuck Lever | 6da24bc | 2008-06-11 17:55:58 -0400 | [diff] [blame] | 580 | dprintk("NFS: write(%s/%s, %lu@%Ld)\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | dentry->d_parent->d_name.name, dentry->d_name.name, |
Chuck Lever | 6da24bc | 2008-06-11 17:55:58 -0400 | [diff] [blame] | 582 | (unsigned long) count, (long long) pos); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | |
| 584 | result = -EBUSY; |
| 585 | if (IS_SWAPFILE(inode)) |
| 586 | goto out_swapfile; |
Trond Myklebust | 7d52e86 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 587 | /* |
| 588 | * O_APPEND implies that we must revalidate the file length. |
| 589 | */ |
| 590 | if (iocb->ki_filp->f_flags & O_APPEND) { |
| 591 | result = nfs_revalidate_file_size(inode, iocb->ki_filp); |
| 592 | if (result) |
| 593 | goto out; |
Trond Myklebust | fe51beec | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 594 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | |
| 596 | result = count; |
| 597 | if (!count) |
| 598 | goto out; |
| 599 | |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 600 | result = generic_file_aio_write(iocb, iov, nr_segs, pos); |
Chuck Lever | 7e38117 | 2010-02-01 14:17:41 -0500 | [diff] [blame] | 601 | if (result > 0) |
| 602 | written = result; |
| 603 | |
Christoph Hellwig | 6b2f3d1 | 2009-10-27 11:05:28 +0100 | [diff] [blame] | 604 | /* Return error values for O_DSYNC and IS_SYNC() */ |
Trond Myklebust | 7b159fc | 2007-07-25 14:09:54 -0400 | [diff] [blame] | 605 | if (result >= 0 && nfs_need_sync_write(iocb->ki_filp, inode)) { |
Trond Myklebust | af7fa16 | 2010-07-31 14:29:06 -0400 | [diff] [blame] | 606 | int err = vfs_fsync(iocb->ki_filp, 0); |
Trond Myklebust | 200baa2 | 2006-12-05 00:35:40 -0500 | [diff] [blame] | 607 | if (err < 0) |
| 608 | result = err; |
| 609 | } |
Chuck Lever | 7e38117 | 2010-02-01 14:17:41 -0500 | [diff] [blame] | 610 | if (result > 0) |
| 611 | nfs_add_stats(inode, NFSIOS_NORMALWRITTENBYTES, written); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 612 | out: |
| 613 | return result; |
| 614 | |
| 615 | out_swapfile: |
| 616 | printk(KERN_INFO "NFS: attempt to write to active swap file!\n"); |
| 617 | goto out; |
| 618 | } |
| 619 | |
Suresh Jayaraman | bf40d34 | 2009-06-17 18:02:09 -0700 | [diff] [blame] | 620 | static ssize_t nfs_file_splice_write(struct pipe_inode_info *pipe, |
| 621 | struct file *filp, loff_t *ppos, |
| 622 | size_t count, unsigned int flags) |
| 623 | { |
| 624 | struct dentry *dentry = filp->f_path.dentry; |
| 625 | struct inode *inode = dentry->d_inode; |
Chuck Lever | 7e38117 | 2010-02-01 14:17:41 -0500 | [diff] [blame] | 626 | unsigned long written = 0; |
Suresh Jayaraman | bf40d34 | 2009-06-17 18:02:09 -0700 | [diff] [blame] | 627 | ssize_t ret; |
| 628 | |
| 629 | dprintk("NFS splice_write(%s/%s, %lu@%llu)\n", |
| 630 | dentry->d_parent->d_name.name, dentry->d_name.name, |
| 631 | (unsigned long) count, (unsigned long long) *ppos); |
| 632 | |
| 633 | /* |
| 634 | * The combination of splice and an O_APPEND destination is disallowed. |
| 635 | */ |
| 636 | |
Suresh Jayaraman | bf40d34 | 2009-06-17 18:02:09 -0700 | [diff] [blame] | 637 | ret = generic_file_splice_write(pipe, filp, ppos, count, flags); |
Chuck Lever | 7e38117 | 2010-02-01 14:17:41 -0500 | [diff] [blame] | 638 | if (ret > 0) |
| 639 | written = ret; |
| 640 | |
Suresh Jayaraman | bf40d34 | 2009-06-17 18:02:09 -0700 | [diff] [blame] | 641 | if (ret >= 0 && nfs_need_sync_write(filp, inode)) { |
Trond Myklebust | af7fa16 | 2010-07-31 14:29:06 -0400 | [diff] [blame] | 642 | int err = vfs_fsync(filp, 0); |
Suresh Jayaraman | bf40d34 | 2009-06-17 18:02:09 -0700 | [diff] [blame] | 643 | if (err < 0) |
| 644 | ret = err; |
| 645 | } |
Chuck Lever | 7e38117 | 2010-02-01 14:17:41 -0500 | [diff] [blame] | 646 | if (ret > 0) |
| 647 | nfs_add_stats(inode, NFSIOS_NORMALWRITTENBYTES, written); |
Suresh Jayaraman | bf40d34 | 2009-06-17 18:02:09 -0700 | [diff] [blame] | 648 | return ret; |
| 649 | } |
| 650 | |
Suresh Jayaraman | 5eebde2 | 2010-09-23 08:55:58 -0400 | [diff] [blame] | 651 | static int |
| 652 | do_getlk(struct file *filp, int cmd, struct file_lock *fl, int is_local) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | { |
| 654 | struct inode *inode = filp->f_mapping->host; |
| 655 | int status = 0; |
Sergey Vlasov | 21ac19d | 2010-11-28 21:04:05 +0000 | [diff] [blame] | 656 | unsigned int saved_type = fl->fl_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 657 | |
Trond Myklebust | 039c4d7 | 2005-10-18 14:20:16 -0700 | [diff] [blame] | 658 | /* Try local locking first */ |
J. Bruce Fields | 6d34ac1 | 2007-05-11 16:09:32 -0400 | [diff] [blame] | 659 | posix_test_lock(filp, fl); |
| 660 | if (fl->fl_type != F_UNLCK) { |
| 661 | /* found a conflict */ |
Trond Myklebust | 039c4d7 | 2005-10-18 14:20:16 -0700 | [diff] [blame] | 662 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 663 | } |
Sergey Vlasov | 21ac19d | 2010-11-28 21:04:05 +0000 | [diff] [blame] | 664 | fl->fl_type = saved_type; |
Trond Myklebust | 039c4d7 | 2005-10-18 14:20:16 -0700 | [diff] [blame] | 665 | |
| 666 | if (nfs_have_delegation(inode, FMODE_READ)) |
| 667 | goto out_noconflict; |
| 668 | |
Suresh Jayaraman | 5eebde2 | 2010-09-23 08:55:58 -0400 | [diff] [blame] | 669 | if (is_local) |
Trond Myklebust | 039c4d7 | 2005-10-18 14:20:16 -0700 | [diff] [blame] | 670 | goto out_noconflict; |
| 671 | |
| 672 | status = NFS_PROTO(inode)->lock(filp, cmd, fl); |
| 673 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 674 | return status; |
Trond Myklebust | 039c4d7 | 2005-10-18 14:20:16 -0700 | [diff] [blame] | 675 | out_noconflict: |
| 676 | fl->fl_type = F_UNLCK; |
| 677 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 678 | } |
| 679 | |
| 680 | static int do_vfs_lock(struct file *file, struct file_lock *fl) |
| 681 | { |
| 682 | int res = 0; |
| 683 | switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) { |
| 684 | case FL_POSIX: |
| 685 | res = posix_lock_file_wait(file, fl); |
| 686 | break; |
| 687 | case FL_FLOCK: |
| 688 | res = flock_lock_file_wait(file, fl); |
| 689 | break; |
| 690 | default: |
| 691 | BUG(); |
| 692 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 693 | return res; |
| 694 | } |
| 695 | |
Suresh Jayaraman | 5eebde2 | 2010-09-23 08:55:58 -0400 | [diff] [blame] | 696 | static int |
| 697 | do_unlk(struct file *filp, int cmd, struct file_lock *fl, int is_local) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | { |
| 699 | struct inode *inode = filp->f_mapping->host; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 700 | int status; |
| 701 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 702 | /* |
| 703 | * Flush all pending writes before doing anything |
| 704 | * with locks.. |
| 705 | */ |
Trond Myklebust | 29884df | 2005-12-13 16:13:54 -0500 | [diff] [blame] | 706 | nfs_sync_mapping(filp->f_mapping); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | |
| 708 | /* NOTE: special case |
| 709 | * If we're signalled while cleaning up locks on process exit, we |
| 710 | * still need to complete the unlock. |
| 711 | */ |
Suresh Jayaraman | 5eebde2 | 2010-09-23 08:55:58 -0400 | [diff] [blame] | 712 | /* |
| 713 | * Use local locking if mounted with "-onolock" or with appropriate |
| 714 | * "-olocal_lock=" |
| 715 | */ |
| 716 | if (!is_local) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 717 | status = NFS_PROTO(inode)->lock(filp, cmd, fl); |
| 718 | else |
| 719 | status = do_vfs_lock(filp, fl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | return status; |
| 721 | } |
| 722 | |
Suresh Jayaraman | 5eebde2 | 2010-09-23 08:55:58 -0400 | [diff] [blame] | 723 | static int |
Ricardo Labiaga | 6b96724 | 2010-10-12 16:30:05 -0700 | [diff] [blame] | 724 | is_time_granular(struct timespec *ts) { |
| 725 | return ((ts->tv_sec == 0) && (ts->tv_nsec <= 1000)); |
| 726 | } |
| 727 | |
| 728 | static int |
Suresh Jayaraman | 5eebde2 | 2010-09-23 08:55:58 -0400 | [diff] [blame] | 729 | do_setlk(struct file *filp, int cmd, struct file_lock *fl, int is_local) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | { |
| 731 | struct inode *inode = filp->f_mapping->host; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 732 | int status; |
| 733 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | /* |
| 735 | * Flush all pending writes before doing anything |
| 736 | * with locks.. |
| 737 | */ |
Trond Myklebust | 29884df | 2005-12-13 16:13:54 -0500 | [diff] [blame] | 738 | status = nfs_sync_mapping(filp->f_mapping); |
| 739 | if (status != 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | goto out; |
| 741 | |
Suresh Jayaraman | 5eebde2 | 2010-09-23 08:55:58 -0400 | [diff] [blame] | 742 | /* |
| 743 | * Use local locking if mounted with "-onolock" or with appropriate |
| 744 | * "-olocal_lock=" |
| 745 | */ |
| 746 | if (!is_local) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 747 | status = NFS_PROTO(inode)->lock(filp, cmd, fl); |
Trond Myklebust | c4d7c40 | 2008-04-01 20:26:52 -0400 | [diff] [blame] | 748 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 749 | status = do_vfs_lock(filp, fl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | if (status < 0) |
| 751 | goto out; |
Ricardo Labiaga | 6b96724 | 2010-10-12 16:30:05 -0700 | [diff] [blame] | 752 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 753 | /* |
Ricardo Labiaga | 6b96724 | 2010-10-12 16:30:05 -0700 | [diff] [blame] | 754 | * Revalidate the cache if the server has time stamps granular |
| 755 | * enough to detect subsecond changes. Otherwise, clear the |
| 756 | * cache to prevent missing any changes. |
| 757 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 758 | * This makes locking act as a cache coherency point. |
| 759 | */ |
Trond Myklebust | 29884df | 2005-12-13 16:13:54 -0500 | [diff] [blame] | 760 | nfs_sync_mapping(filp->f_mapping); |
Ricardo Labiaga | 6b96724 | 2010-10-12 16:30:05 -0700 | [diff] [blame] | 761 | if (!nfs_have_delegation(inode, FMODE_READ)) { |
| 762 | if (is_time_granular(&NFS_SERVER(inode)->time_delta)) |
| 763 | __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
| 764 | else |
| 765 | nfs_zap_caches(inode); |
| 766 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 767 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | return status; |
| 769 | } |
| 770 | |
| 771 | /* |
| 772 | * Lock a (portion of) a file |
| 773 | */ |
| 774 | static int nfs_lock(struct file *filp, int cmd, struct file_lock *fl) |
| 775 | { |
Chuck Lever | 6da24bc | 2008-06-11 17:55:58 -0400 | [diff] [blame] | 776 | struct inode *inode = filp->f_mapping->host; |
Trond Myklebust | 2116271 | 2008-05-20 19:34:39 -0400 | [diff] [blame] | 777 | int ret = -ENOLCK; |
Suresh Jayaraman | 5eebde2 | 2010-09-23 08:55:58 -0400 | [diff] [blame] | 778 | int is_local = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | |
Chuck Lever | 6da24bc | 2008-06-11 17:55:58 -0400 | [diff] [blame] | 780 | dprintk("NFS: lock(%s/%s, t=%x, fl=%x, r=%lld:%lld)\n", |
| 781 | filp->f_path.dentry->d_parent->d_name.name, |
| 782 | filp->f_path.dentry->d_name.name, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 783 | fl->fl_type, fl->fl_flags, |
| 784 | (long long)fl->fl_start, (long long)fl->fl_end); |
Chuck Lever | 6da24bc | 2008-06-11 17:55:58 -0400 | [diff] [blame] | 785 | |
Chuck Lever | 91d5b47 | 2006-03-20 13:44:14 -0500 | [diff] [blame] | 786 | nfs_inc_stats(inode, NFSIOS_VFSLOCK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 787 | |
| 788 | /* No mandatory locks over NFS */ |
Pavel Emelyanov | dfad944 | 2007-10-01 14:41:15 -0700 | [diff] [blame] | 789 | if (__mandatory_lock(inode) && fl->fl_type != F_UNLCK) |
Trond Myklebust | 2116271 | 2008-05-20 19:34:39 -0400 | [diff] [blame] | 790 | goto out_err; |
| 791 | |
Suresh Jayaraman | 5eebde2 | 2010-09-23 08:55:58 -0400 | [diff] [blame] | 792 | if (NFS_SERVER(inode)->flags & NFS_MOUNT_LOCAL_FCNTL) |
| 793 | is_local = 1; |
| 794 | |
Trond Myklebust | 2116271 | 2008-05-20 19:34:39 -0400 | [diff] [blame] | 795 | if (NFS_PROTO(inode)->lock_check_bounds != NULL) { |
| 796 | ret = NFS_PROTO(inode)->lock_check_bounds(fl); |
| 797 | if (ret < 0) |
| 798 | goto out_err; |
| 799 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 800 | |
| 801 | if (IS_GETLK(cmd)) |
Suresh Jayaraman | 5eebde2 | 2010-09-23 08:55:58 -0400 | [diff] [blame] | 802 | ret = do_getlk(filp, cmd, fl, is_local); |
Trond Myklebust | 2116271 | 2008-05-20 19:34:39 -0400 | [diff] [blame] | 803 | else if (fl->fl_type == F_UNLCK) |
Suresh Jayaraman | 5eebde2 | 2010-09-23 08:55:58 -0400 | [diff] [blame] | 804 | ret = do_unlk(filp, cmd, fl, is_local); |
Trond Myklebust | 2116271 | 2008-05-20 19:34:39 -0400 | [diff] [blame] | 805 | else |
Suresh Jayaraman | 5eebde2 | 2010-09-23 08:55:58 -0400 | [diff] [blame] | 806 | ret = do_setlk(filp, cmd, fl, is_local); |
Trond Myklebust | 2116271 | 2008-05-20 19:34:39 -0400 | [diff] [blame] | 807 | out_err: |
| 808 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 809 | } |
| 810 | |
| 811 | /* |
| 812 | * Lock a (portion of) a file |
| 813 | */ |
| 814 | static int nfs_flock(struct file *filp, int cmd, struct file_lock *fl) |
| 815 | { |
Suresh Jayaraman | 5eebde2 | 2010-09-23 08:55:58 -0400 | [diff] [blame] | 816 | struct inode *inode = filp->f_mapping->host; |
| 817 | int is_local = 0; |
| 818 | |
Chuck Lever | 6da24bc | 2008-06-11 17:55:58 -0400 | [diff] [blame] | 819 | dprintk("NFS: flock(%s/%s, t=%x, fl=%x)\n", |
| 820 | filp->f_path.dentry->d_parent->d_name.name, |
| 821 | filp->f_path.dentry->d_name.name, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 822 | fl->fl_type, fl->fl_flags); |
| 823 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 824 | if (!(fl->fl_flags & FL_FLOCK)) |
| 825 | return -ENOLCK; |
| 826 | |
Suresh Jayaraman | 5eebde2 | 2010-09-23 08:55:58 -0400 | [diff] [blame] | 827 | if (NFS_SERVER(inode)->flags & NFS_MOUNT_LOCAL_FLOCK) |
| 828 | is_local = 1; |
| 829 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 830 | /* We're simulating flock() locks using posix locks on the server */ |
| 831 | fl->fl_owner = (fl_owner_t)filp; |
| 832 | fl->fl_start = 0; |
| 833 | fl->fl_end = OFFSET_MAX; |
| 834 | |
| 835 | if (fl->fl_type == F_UNLCK) |
Suresh Jayaraman | 5eebde2 | 2010-09-23 08:55:58 -0400 | [diff] [blame] | 836 | return do_unlk(filp, cmd, fl, is_local); |
| 837 | return do_setlk(filp, cmd, fl, is_local); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 838 | } |
J. Bruce Fields | 370f659 | 2007-06-08 15:23:34 -0400 | [diff] [blame] | 839 | |
Chuck Lever | 6da24bc | 2008-06-11 17:55:58 -0400 | [diff] [blame] | 840 | /* |
| 841 | * There is no protocol support for leases, so we have no way to implement |
| 842 | * them correctly in the face of opens by other clients. |
| 843 | */ |
J. Bruce Fields | 370f659 | 2007-06-08 15:23:34 -0400 | [diff] [blame] | 844 | static int nfs_setlease(struct file *file, long arg, struct file_lock **fl) |
| 845 | { |
Chuck Lever | 6da24bc | 2008-06-11 17:55:58 -0400 | [diff] [blame] | 846 | dprintk("NFS: setlease(%s/%s, arg=%ld)\n", |
| 847 | file->f_path.dentry->d_parent->d_name.name, |
| 848 | file->f_path.dentry->d_name.name, arg); |
J. Bruce Fields | 370f659 | 2007-06-08 15:23:34 -0400 | [diff] [blame] | 849 | return -EINVAL; |
| 850 | } |
Jeff Layton | 1788ea6 | 2011-11-04 13:31:21 -0400 | [diff] [blame] | 851 | |
Jeff Layton | 0486958 | 2011-11-04 13:31:22 -0400 | [diff] [blame] | 852 | const struct file_operations nfs_file_operations = { |
| 853 | .llseek = nfs_file_llseek, |
| 854 | .read = do_sync_read, |
| 855 | .write = do_sync_write, |
| 856 | .aio_read = nfs_file_read, |
| 857 | .aio_write = nfs_file_write, |
| 858 | .mmap = nfs_file_mmap, |
| 859 | .open = nfs_file_open, |
| 860 | .flush = nfs_file_flush, |
| 861 | .release = nfs_file_release, |
| 862 | .fsync = nfs_file_fsync, |
| 863 | .lock = nfs_lock, |
| 864 | .flock = nfs_flock, |
| 865 | .splice_read = nfs_file_splice_read, |
| 866 | .splice_write = nfs_file_splice_write, |
| 867 | .check_flags = nfs_check_flags, |
| 868 | .setlease = nfs_setlease, |
| 869 | }; |
| 870 | |
Jeff Layton | 1788ea6 | 2011-11-04 13:31:21 -0400 | [diff] [blame] | 871 | #ifdef CONFIG_NFS_V4 |
| 872 | static int |
| 873 | nfs4_file_open(struct inode *inode, struct file *filp) |
| 874 | { |
| 875 | /* |
| 876 | * NFSv4 opens are handled in d_lookup and d_revalidate. If we get to |
| 877 | * this point, then something is very wrong |
| 878 | */ |
| 879 | dprintk("NFS: %s called! inode=%p filp=%p\n", __func__, inode, filp); |
| 880 | return -ENOTDIR; |
| 881 | } |
| 882 | |
| 883 | const struct file_operations nfs4_file_operations = { |
| 884 | .llseek = nfs_file_llseek, |
| 885 | .read = do_sync_read, |
| 886 | .write = do_sync_write, |
| 887 | .aio_read = nfs_file_read, |
| 888 | .aio_write = nfs_file_write, |
| 889 | .mmap = nfs_file_mmap, |
| 890 | .open = nfs4_file_open, |
| 891 | .flush = nfs_file_flush, |
| 892 | .release = nfs_file_release, |
| 893 | .fsync = nfs_file_fsync, |
| 894 | .lock = nfs_lock, |
| 895 | .flock = nfs_flock, |
| 896 | .splice_read = nfs_file_splice_read, |
| 897 | .splice_write = nfs_file_splice_write, |
| 898 | .check_flags = nfs_check_flags, |
| 899 | .setlease = nfs_setlease, |
| 900 | }; |
| 901 | #endif /* CONFIG_NFS_V4 */ |