Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame] | 1 | /* |
| 2 | FUSE: Filesystem in Userspace |
Miklos Szeredi | 2e6b6f2 | 2004-07-07 19:19:53 +0000 | [diff] [blame] | 3 | Copyright (C) 2001-2004 Miklos Szeredi <miklos@szeredi.hu> |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame] | 4 | |
| 5 | This program can be distributed under the terms of the GNU GPL. |
| 6 | See the file COPYING. |
| 7 | */ |
Miklos Szeredi | 83a0744 | 2004-11-30 18:25:20 +0000 | [diff] [blame] | 8 | |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame] | 9 | #include "fuse_i.h" |
| 10 | |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame] | 11 | #include <linux/pagemap.h> |
Miklos Szeredi | a181e61 | 2001-11-06 12:03:23 +0000 | [diff] [blame] | 12 | #include <linux/slab.h> |
Miklos Szeredi | 13ed482 | 2004-11-20 11:12:21 +0000 | [diff] [blame] | 13 | #include <linux/kernel.h> |
| 14 | #include <linux/module.h> |
Miklos Szeredi | aa63b6b | 2004-12-03 13:24:35 +0000 | [diff] [blame^] | 15 | #include <linux/rmap.h> |
Miklos Szeredi | f85ab24 | 2004-01-07 12:16:45 +0000 | [diff] [blame] | 16 | #ifdef KERNEL_2_6 |
Miklos Szeredi | 7c35cf9 | 2004-01-14 16:56:49 +0000 | [diff] [blame] | 17 | #include <linux/writeback.h> |
Miklos Szeredi | 13ed482 | 2004-11-20 11:12:21 +0000 | [diff] [blame] | 18 | #include <linux/moduleparam.h> |
Miklos Szeredi | f85ab24 | 2004-01-07 12:16:45 +0000 | [diff] [blame] | 19 | #endif |
Miklos Szeredi | 13ed482 | 2004-11-20 11:12:21 +0000 | [diff] [blame] | 20 | #include <asm/uaccess.h> |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame] | 21 | |
Miklos Szeredi | 209f5d0 | 2004-07-24 19:56:16 +0000 | [diff] [blame] | 22 | static int user_mmap; |
| 23 | #ifdef KERNEL_2_6 |
Miklos Szeredi | 13ed482 | 2004-11-20 11:12:21 +0000 | [diff] [blame] | 24 | module_param(user_mmap, int, 0644); |
Miklos Szeredi | 209f5d0 | 2004-07-24 19:56:16 +0000 | [diff] [blame] | 25 | #else |
| 26 | MODULE_PARM(user_mmap, "i"); |
Miklos Szeredi | 13ed482 | 2004-11-20 11:12:21 +0000 | [diff] [blame] | 27 | #define PageUptodate(page) Page_Uptodate(page) |
Miklos Szeredi | 209f5d0 | 2004-07-24 19:56:16 +0000 | [diff] [blame] | 28 | #endif |
Miklos Szeredi | 209f5d0 | 2004-07-24 19:56:16 +0000 | [diff] [blame] | 29 | MODULE_PARM_DESC(user_mmap, "Allow non root user to create a shared writable mapping"); |
| 30 | |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame] | 31 | static int fuse_open(struct inode *inode, struct file *file) |
| 32 | { |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 33 | struct fuse_conn *fc = get_fuse_conn(inode); |
Miklos Szeredi | 7eafcce | 2004-06-19 22:42:38 +0000 | [diff] [blame] | 34 | struct fuse_req *req; |
Miklos Szeredi | 4369643 | 2001-11-18 19:15:05 +0000 | [diff] [blame] | 35 | struct fuse_open_in inarg; |
Miklos Szeredi | 209f5d0 | 2004-07-24 19:56:16 +0000 | [diff] [blame] | 36 | struct fuse_open_out outarg; |
| 37 | struct fuse_file *ff; |
Miklos Szeredi | f58cc61 | 2004-02-06 13:52:00 +0000 | [diff] [blame] | 38 | int err; |
| 39 | |
| 40 | err = generic_file_open(inode, file); |
Miklos Szeredi | c26c14d | 2004-04-09 17:48:32 +0000 | [diff] [blame] | 41 | if (err) |
Miklos Szeredi | f58cc61 | 2004-02-06 13:52:00 +0000 | [diff] [blame] | 42 | return err; |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame] | 43 | |
Miklos Szeredi | fe25def | 2001-12-20 15:38:05 +0000 | [diff] [blame] | 44 | /* If opening the root node, no lookup has been performed on |
| 45 | it, so the attributes must be refreshed */ |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 46 | if (get_node_id(inode) == FUSE_ROOT_ID) { |
Miklos Szeredi | f85ab24 | 2004-01-07 12:16:45 +0000 | [diff] [blame] | 47 | int err = fuse_do_getattr(inode); |
Miklos Szeredi | c26c14d | 2004-04-09 17:48:32 +0000 | [diff] [blame] | 48 | if (err) |
Miklos Szeredi | fe25def | 2001-12-20 15:38:05 +0000 | [diff] [blame] | 49 | return err; |
| 50 | } |
| 51 | |
Miklos Szeredi | ad051c3 | 2004-07-02 09:22:50 +0000 | [diff] [blame] | 52 | down(&inode->i_sem); |
| 53 | err = -ERESTARTSYS; |
Miklos Szeredi | 7eafcce | 2004-06-19 22:42:38 +0000 | [diff] [blame] | 54 | req = fuse_get_request(fc); |
| 55 | if (!req) |
Miklos Szeredi | ad051c3 | 2004-07-02 09:22:50 +0000 | [diff] [blame] | 56 | goto out; |
Miklos Szeredi | 7eafcce | 2004-06-19 22:42:38 +0000 | [diff] [blame] | 57 | |
Miklos Szeredi | ad051c3 | 2004-07-02 09:22:50 +0000 | [diff] [blame] | 58 | err = -ENOMEM; |
Miklos Szeredi | 209f5d0 | 2004-07-24 19:56:16 +0000 | [diff] [blame] | 59 | ff = kmalloc(sizeof(struct fuse_file), GFP_KERNEL); |
| 60 | if (!ff) |
Miklos Szeredi | ad051c3 | 2004-07-02 09:22:50 +0000 | [diff] [blame] | 61 | goto out_put_request; |
Miklos Szeredi | d3dd2d5 | 2004-06-22 18:46:02 +0000 | [diff] [blame] | 62 | |
Miklos Szeredi | 209f5d0 | 2004-07-24 19:56:16 +0000 | [diff] [blame] | 63 | ff->release_req = fuse_request_alloc(); |
| 64 | if (!ff->release_req) { |
| 65 | kfree(ff); |
| 66 | goto out_put_request; |
| 67 | } |
| 68 | |
Miklos Szeredi | 4369643 | 2001-11-18 19:15:05 +0000 | [diff] [blame] | 69 | memset(&inarg, 0, sizeof(inarg)); |
| 70 | inarg.flags = file->f_flags & ~O_EXCL; |
Miklos Szeredi | 7eafcce | 2004-06-19 22:42:38 +0000 | [diff] [blame] | 71 | req->in.h.opcode = FUSE_OPEN; |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 72 | req->in.h.nodeid = get_node_id(inode); |
Miklos Szeredi | 7eafcce | 2004-06-19 22:42:38 +0000 | [diff] [blame] | 73 | req->in.numargs = 1; |
| 74 | req->in.args[0].size = sizeof(inarg); |
| 75 | req->in.args[0].value = &inarg; |
Miklos Szeredi | 209f5d0 | 2004-07-24 19:56:16 +0000 | [diff] [blame] | 76 | req->out.numargs = 1; |
| 77 | req->out.args[0].size = sizeof(outarg); |
| 78 | req->out.args[0].value = &outarg; |
Miklos Szeredi | 7eafcce | 2004-06-19 22:42:38 +0000 | [diff] [blame] | 79 | request_send(fc, req); |
| 80 | err = req->out.h.error; |
| 81 | if (!err && !(fc->flags & FUSE_KERNEL_CACHE)) { |
Miklos Szeredi | f85ab24 | 2004-01-07 12:16:45 +0000 | [diff] [blame] | 82 | #ifdef KERNEL_2_6 |
| 83 | invalidate_inode_pages(inode->i_mapping); |
| 84 | #else |
Miklos Szeredi | a181e61 | 2001-11-06 12:03:23 +0000 | [diff] [blame] | 85 | invalidate_inode_pages(inode); |
Miklos Szeredi | f85ab24 | 2004-01-07 12:16:45 +0000 | [diff] [blame] | 86 | #endif |
| 87 | } |
Miklos Szeredi | 209f5d0 | 2004-07-24 19:56:16 +0000 | [diff] [blame] | 88 | if (err) { |
| 89 | fuse_request_free(ff->release_req); |
| 90 | kfree(ff); |
| 91 | } |
| 92 | else { |
| 93 | ff->fh = outarg.fh; |
| 94 | file->private_data = ff; |
| 95 | INIT_LIST_HEAD(&ff->ff_list); |
| 96 | } |
Miklos Szeredi | ad051c3 | 2004-07-02 09:22:50 +0000 | [diff] [blame] | 97 | |
| 98 | out_put_request: |
Miklos Szeredi | 7eafcce | 2004-06-19 22:42:38 +0000 | [diff] [blame] | 99 | fuse_put_request(fc, req); |
Miklos Szeredi | ad051c3 | 2004-07-02 09:22:50 +0000 | [diff] [blame] | 100 | out: |
| 101 | up(&inode->i_sem); |
Miklos Szeredi | 7eafcce | 2004-06-19 22:42:38 +0000 | [diff] [blame] | 102 | return err; |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame] | 103 | } |
| 104 | |
Miklos Szeredi | 58615e0 | 2004-07-04 21:21:08 +0000 | [diff] [blame] | 105 | void fuse_sync_inode(struct inode *inode) |
| 106 | { |
| 107 | #ifdef KERNEL_2_6 |
| 108 | filemap_fdatawrite(inode->i_mapping); |
| 109 | filemap_fdatawait(inode->i_mapping); |
| 110 | #else |
| 111 | #ifndef NO_MM |
| 112 | filemap_fdatasync(inode->i_mapping); |
| 113 | filemap_fdatawait(inode->i_mapping); |
| 114 | #endif |
| 115 | #endif |
| 116 | } |
| 117 | |
Miklos Szeredi | c8ba237 | 2002-12-10 12:26:00 +0000 | [diff] [blame] | 118 | static int fuse_release(struct inode *inode, struct file *file) |
| 119 | { |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 120 | struct fuse_conn *fc = get_fuse_conn(inode); |
Miklos Szeredi | 209f5d0 | 2004-07-24 19:56:16 +0000 | [diff] [blame] | 121 | struct fuse_file *ff = file->private_data; |
| 122 | struct fuse_req *req = ff->release_req; |
Miklos Szeredi | 72cf5c9 | 2004-11-20 16:10:30 +0000 | [diff] [blame] | 123 | struct fuse_release_in inarg; |
Miklos Szeredi | aa63b6b | 2004-12-03 13:24:35 +0000 | [diff] [blame^] | 124 | |
Miklos Szeredi | ad051c3 | 2004-07-02 09:22:50 +0000 | [diff] [blame] | 125 | down(&inode->i_sem); |
Miklos Szeredi | 58615e0 | 2004-07-04 21:21:08 +0000 | [diff] [blame] | 126 | if (file->f_mode & FMODE_WRITE) |
| 127 | fuse_sync_inode(inode); |
| 128 | |
Miklos Szeredi | 209f5d0 | 2004-07-24 19:56:16 +0000 | [diff] [blame] | 129 | if (!list_empty(&ff->ff_list)) { |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 130 | struct fuse_inode *fi = get_fuse_inode(inode); |
Miklos Szeredi | 209f5d0 | 2004-07-24 19:56:16 +0000 | [diff] [blame] | 131 | down_write(&fi->write_sem); |
| 132 | list_del(&ff->ff_list); |
| 133 | up_write(&fi->write_sem); |
| 134 | } |
| 135 | |
Miklos Szeredi | 72cf5c9 | 2004-11-20 16:10:30 +0000 | [diff] [blame] | 136 | memset(&inarg, 0, sizeof(inarg)); |
| 137 | inarg.fh = ff->fh; |
| 138 | inarg.flags = file->f_flags & ~O_EXCL; |
Miklos Szeredi | 7eafcce | 2004-06-19 22:42:38 +0000 | [diff] [blame] | 139 | req->in.h.opcode = FUSE_RELEASE; |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 140 | req->in.h.nodeid = get_node_id(inode); |
Miklos Szeredi | 7eafcce | 2004-06-19 22:42:38 +0000 | [diff] [blame] | 141 | req->in.numargs = 1; |
Miklos Szeredi | 72cf5c9 | 2004-11-20 16:10:30 +0000 | [diff] [blame] | 142 | req->in.args[0].size = sizeof(inarg); |
| 143 | req->in.args[0].value = &inarg; |
Miklos Szeredi | 13ed482 | 2004-11-20 11:12:21 +0000 | [diff] [blame] | 144 | request_send(fc, req); |
Miklos Szeredi | 556d03d | 2004-06-30 11:13:41 +0000 | [diff] [blame] | 145 | fuse_put_request(fc, req); |
Miklos Szeredi | 209f5d0 | 2004-07-24 19:56:16 +0000 | [diff] [blame] | 146 | kfree(ff); |
Miklos Szeredi | ad051c3 | 2004-07-02 09:22:50 +0000 | [diff] [blame] | 147 | up(&inode->i_sem); |
Miklos Szeredi | 383a9df | 2002-12-10 14:54:57 +0000 | [diff] [blame] | 148 | |
Miklos Szeredi | 7eafcce | 2004-06-19 22:42:38 +0000 | [diff] [blame] | 149 | /* Return value is ignored by VFS */ |
Miklos Szeredi | 383a9df | 2002-12-10 14:54:57 +0000 | [diff] [blame] | 150 | return 0; |
Miklos Szeredi | c8ba237 | 2002-12-10 12:26:00 +0000 | [diff] [blame] | 151 | } |
| 152 | |
Miklos Szeredi | e2e4ac2 | 2004-05-18 08:45:28 +0000 | [diff] [blame] | 153 | static int fuse_flush(struct file *file) |
| 154 | { |
| 155 | struct inode *inode = file->f_dentry->d_inode; |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 156 | struct fuse_conn *fc = get_fuse_conn(inode); |
Miklos Szeredi | 209f5d0 | 2004-07-24 19:56:16 +0000 | [diff] [blame] | 157 | struct fuse_file *ff = file->private_data; |
Miklos Szeredi | d45baf4 | 2004-10-10 07:56:12 +0000 | [diff] [blame] | 158 | struct fuse_req *req = ff->release_req; |
Miklos Szeredi | 209f5d0 | 2004-07-24 19:56:16 +0000 | [diff] [blame] | 159 | struct fuse_flush_in inarg; |
Miklos Szeredi | 7eafcce | 2004-06-19 22:42:38 +0000 | [diff] [blame] | 160 | int err; |
Miklos Szeredi | aa63b6b | 2004-12-03 13:24:35 +0000 | [diff] [blame^] | 161 | |
Miklos Szeredi | 63b8c1c | 2004-06-03 14:45:04 +0000 | [diff] [blame] | 162 | if (fc->no_flush) |
| 163 | return 0; |
| 164 | |
Miklos Szeredi | d45baf4 | 2004-10-10 07:56:12 +0000 | [diff] [blame] | 165 | down(&inode->i_sem); |
Miklos Szeredi | 209f5d0 | 2004-07-24 19:56:16 +0000 | [diff] [blame] | 166 | memset(&inarg, 0, sizeof(inarg)); |
| 167 | inarg.fh = ff->fh; |
Miklos Szeredi | 7eafcce | 2004-06-19 22:42:38 +0000 | [diff] [blame] | 168 | req->in.h.opcode = FUSE_FLUSH; |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 169 | req->in.h.nodeid = get_node_id(inode); |
Miklos Szeredi | 209f5d0 | 2004-07-24 19:56:16 +0000 | [diff] [blame] | 170 | req->in.numargs = 1; |
| 171 | req->in.args[0].size = sizeof(inarg); |
| 172 | req->in.args[0].value = &inarg; |
Miklos Szeredi | 13ed482 | 2004-11-20 11:12:21 +0000 | [diff] [blame] | 173 | request_send(fc, req); |
Miklos Szeredi | 7eafcce | 2004-06-19 22:42:38 +0000 | [diff] [blame] | 174 | err = req->out.h.error; |
Miklos Szeredi | 95a2bfc | 2004-10-26 21:32:13 +0000 | [diff] [blame] | 175 | fuse_reset_request(req); |
Miklos Szeredi | d45baf4 | 2004-10-10 07:56:12 +0000 | [diff] [blame] | 176 | up(&inode->i_sem); |
Miklos Szeredi | 7eafcce | 2004-06-19 22:42:38 +0000 | [diff] [blame] | 177 | if (err == -ENOSYS) { |
Miklos Szeredi | 63b8c1c | 2004-06-03 14:45:04 +0000 | [diff] [blame] | 178 | fc->no_flush = 1; |
Miklos Szeredi | 7eafcce | 2004-06-19 22:42:38 +0000 | [diff] [blame] | 179 | err = 0; |
Miklos Szeredi | 63b8c1c | 2004-06-03 14:45:04 +0000 | [diff] [blame] | 180 | } |
Miklos Szeredi | 7eafcce | 2004-06-19 22:42:38 +0000 | [diff] [blame] | 181 | return err; |
Miklos Szeredi | e2e4ac2 | 2004-05-18 08:45:28 +0000 | [diff] [blame] | 182 | } |
| 183 | |
Miklos Szeredi | e4cf733 | 2003-12-12 11:53:31 +0000 | [diff] [blame] | 184 | static int fuse_fsync(struct file *file, struct dentry *de, int datasync) |
| 185 | { |
Miklos Szeredi | 5e43f2c | 2003-12-12 14:06:41 +0000 | [diff] [blame] | 186 | struct inode *inode = de->d_inode; |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 187 | struct fuse_inode *fi = get_fuse_inode(inode); |
| 188 | struct fuse_conn *fc = get_fuse_conn(inode); |
Miklos Szeredi | 209f5d0 | 2004-07-24 19:56:16 +0000 | [diff] [blame] | 189 | struct fuse_file *ff = file->private_data; |
Miklos Szeredi | 7eafcce | 2004-06-19 22:42:38 +0000 | [diff] [blame] | 190 | struct fuse_req *req; |
Miklos Szeredi | 5e43f2c | 2003-12-12 14:06:41 +0000 | [diff] [blame] | 191 | struct fuse_fsync_in inarg; |
Miklos Szeredi | 7eafcce | 2004-06-19 22:42:38 +0000 | [diff] [blame] | 192 | int err; |
Miklos Szeredi | aa63b6b | 2004-12-03 13:24:35 +0000 | [diff] [blame^] | 193 | |
Miklos Szeredi | 63b8c1c | 2004-06-03 14:45:04 +0000 | [diff] [blame] | 194 | if (fc->no_fsync) |
| 195 | return 0; |
| 196 | |
Miklos Szeredi | 7eafcce | 2004-06-19 22:42:38 +0000 | [diff] [blame] | 197 | req = fuse_get_request(fc); |
| 198 | if (!req) |
| 199 | return -ERESTARTSYS; |
Miklos Szeredi | 069c950 | 2004-07-16 16:17:02 +0000 | [diff] [blame] | 200 | |
| 201 | /* Make sure all writes to this inode are completed before |
| 202 | issuing the FSYNC request */ |
| 203 | down_write(&fi->write_sem); |
| 204 | up_write(&fi->write_sem); |
| 205 | |
Miklos Szeredi | 5e43f2c | 2003-12-12 14:06:41 +0000 | [diff] [blame] | 206 | memset(&inarg, 0, sizeof(inarg)); |
Miklos Szeredi | 209f5d0 | 2004-07-24 19:56:16 +0000 | [diff] [blame] | 207 | inarg.fh = ff->fh; |
Miklos Szeredi | 5e43f2c | 2003-12-12 14:06:41 +0000 | [diff] [blame] | 208 | inarg.datasync = datasync; |
Miklos Szeredi | 7eafcce | 2004-06-19 22:42:38 +0000 | [diff] [blame] | 209 | req->in.h.opcode = FUSE_FSYNC; |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 210 | req->in.h.nodeid = get_node_id(inode); |
Miklos Szeredi | 7eafcce | 2004-06-19 22:42:38 +0000 | [diff] [blame] | 211 | req->in.numargs = 1; |
| 212 | req->in.args[0].size = sizeof(inarg); |
| 213 | req->in.args[0].value = &inarg; |
| 214 | request_send(fc, req); |
| 215 | err = req->out.h.error; |
| 216 | if (err == -ENOSYS) { |
Miklos Szeredi | 63b8c1c | 2004-06-03 14:45:04 +0000 | [diff] [blame] | 217 | fc->no_fsync = 1; |
Miklos Szeredi | 7eafcce | 2004-06-19 22:42:38 +0000 | [diff] [blame] | 218 | err = 0; |
Miklos Szeredi | 63b8c1c | 2004-06-03 14:45:04 +0000 | [diff] [blame] | 219 | } |
Miklos Szeredi | 7eafcce | 2004-06-19 22:42:38 +0000 | [diff] [blame] | 220 | fuse_put_request(fc, req); |
| 221 | return err; |
Miklos Szeredi | e4cf733 | 2003-12-12 11:53:31 +0000 | [diff] [blame] | 222 | } |
Miklos Szeredi | a181e61 | 2001-11-06 12:03:23 +0000 | [diff] [blame] | 223 | |
Miklos Szeredi | 83a0744 | 2004-11-30 18:25:20 +0000 | [diff] [blame] | 224 | static void fuse_read_init(struct fuse_req *req, struct file *file, |
| 225 | struct inode *inode, loff_t pos, size_t count) |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame] | 226 | { |
Miklos Szeredi | 209f5d0 | 2004-07-24 19:56:16 +0000 | [diff] [blame] | 227 | struct fuse_file *ff = file->private_data; |
Miklos Szeredi | 83a0744 | 2004-11-30 18:25:20 +0000 | [diff] [blame] | 228 | struct fuse_read_in *inarg = &req->misc.read_in; |
| 229 | |
| 230 | inarg->fh = ff->fh; |
| 231 | inarg->offset = pos; |
| 232 | inarg->size = count; |
Miklos Szeredi | 7eafcce | 2004-06-19 22:42:38 +0000 | [diff] [blame] | 233 | req->in.h.opcode = FUSE_READ; |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 234 | req->in.h.nodeid = get_node_id(inode); |
Miklos Szeredi | 7eafcce | 2004-06-19 22:42:38 +0000 | [diff] [blame] | 235 | req->in.numargs = 1; |
Miklos Szeredi | 83a0744 | 2004-11-30 18:25:20 +0000 | [diff] [blame] | 236 | req->in.args[0].size = sizeof(struct fuse_read_in); |
| 237 | req->in.args[0].value = inarg; |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 238 | req->out.argpages = 1; |
Miklos Szeredi | 7eafcce | 2004-06-19 22:42:38 +0000 | [diff] [blame] | 239 | req->out.argvar = 1; |
| 240 | req->out.numargs = 1; |
Miklos Szeredi | ad051c3 | 2004-07-02 09:22:50 +0000 | [diff] [blame] | 241 | req->out.args[0].size = count; |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame] | 242 | } |
| 243 | |
Miklos Szeredi | ad051c3 | 2004-07-02 09:22:50 +0000 | [diff] [blame] | 244 | static int fuse_readpage(struct file *file, struct page *page) |
| 245 | { |
| 246 | struct inode *inode = page->mapping->host; |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 247 | struct fuse_conn *fc = get_fuse_conn(inode); |
Miklos Szeredi | 83a0744 | 2004-11-30 18:25:20 +0000 | [diff] [blame] | 248 | struct fuse_req *req = fuse_get_request_nonint(fc); |
Miklos Szeredi | aa63b6b | 2004-12-03 13:24:35 +0000 | [diff] [blame^] | 249 | loff_t pos = (loff_t) page->index << PAGE_CACHE_SHIFT; |
Miklos Szeredi | 83a0744 | 2004-11-30 18:25:20 +0000 | [diff] [blame] | 250 | int err; |
Miklos Szeredi | aa63b6b | 2004-12-03 13:24:35 +0000 | [diff] [blame^] | 251 | |
| 252 | fuse_read_init(req, file, inode, pos, PAGE_CACHE_SIZE); |
Miklos Szeredi | 5c7e63e | 2004-12-01 23:31:03 +0000 | [diff] [blame] | 253 | req->out.page_zeroing = 1; |
Miklos Szeredi | 83a0744 | 2004-11-30 18:25:20 +0000 | [diff] [blame] | 254 | req->num_pages = 1; |
| 255 | req->pages[0] = page; |
| 256 | request_send(fc, req); |
| 257 | err = req->out.h.error; |
| 258 | fuse_put_request(fc, req); |
| 259 | if (!err) |
Miklos Szeredi | ad051c3 | 2004-07-02 09:22:50 +0000 | [diff] [blame] | 260 | SetPageUptodate(page); |
Miklos Szeredi | ad051c3 | 2004-07-02 09:22:50 +0000 | [diff] [blame] | 261 | unlock_page(page); |
Miklos Szeredi | 83a0744 | 2004-11-30 18:25:20 +0000 | [diff] [blame] | 262 | return err; |
Miklos Szeredi | ad051c3 | 2004-07-02 09:22:50 +0000 | [diff] [blame] | 263 | } |
| 264 | |
Miklos Szeredi | 5886537 | 2004-07-20 14:22:26 +0000 | [diff] [blame] | 265 | #ifdef KERNEL_2_6 |
Miklos Szeredi | 5886537 | 2004-07-20 14:22:26 +0000 | [diff] [blame] | 266 | static void read_pages_end(struct fuse_conn *fc, struct fuse_req *req) |
| 267 | { |
| 268 | unsigned i; |
Miklos Szeredi | 83a0744 | 2004-11-30 18:25:20 +0000 | [diff] [blame] | 269 | for (i = 0; i < req->num_pages; i++) { |
| 270 | struct page *page = req->pages[i]; |
| 271 | if (!req->out.h.error) |
| 272 | SetPageUptodate(page); |
| 273 | unlock_page(page); |
| 274 | } |
Miklos Szeredi | 5886537 | 2004-07-20 14:22:26 +0000 | [diff] [blame] | 275 | fuse_put_request(fc, req); |
| 276 | } |
| 277 | |
Miklos Szeredi | 209f5d0 | 2004-07-24 19:56:16 +0000 | [diff] [blame] | 278 | static void fuse_send_readpages(struct fuse_req *req, struct file *file, |
| 279 | struct inode *inode) |
Miklos Szeredi | 5886537 | 2004-07-20 14:22:26 +0000 | [diff] [blame] | 280 | { |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 281 | struct fuse_conn *fc = get_fuse_conn(inode); |
Miklos Szeredi | aa63b6b | 2004-12-03 13:24:35 +0000 | [diff] [blame^] | 282 | loff_t pos = (loff_t) req->pages[0]->index << PAGE_CACHE_SHIFT; |
| 283 | size_t count = req->num_pages << PAGE_CACHE_SHIFT; |
Miklos Szeredi | 83a0744 | 2004-11-30 18:25:20 +0000 | [diff] [blame] | 284 | fuse_read_init(req, file, inode, pos, count); |
Miklos Szeredi | 5c7e63e | 2004-12-01 23:31:03 +0000 | [diff] [blame] | 285 | req->out.page_zeroing = 1; |
Miklos Szeredi | 83a0744 | 2004-11-30 18:25:20 +0000 | [diff] [blame] | 286 | request_send_async(fc, req, read_pages_end); |
Miklos Szeredi | 5886537 | 2004-07-20 14:22:26 +0000 | [diff] [blame] | 287 | } |
| 288 | |
Miklos Szeredi | 209f5d0 | 2004-07-24 19:56:16 +0000 | [diff] [blame] | 289 | struct fuse_readpages_data { |
| 290 | struct fuse_req *req; |
| 291 | struct file *file; |
| 292 | struct inode *inode; |
| 293 | }; |
| 294 | |
| 295 | static int fuse_readpages_fill(void *_data, struct page *page) |
Miklos Szeredi | 5886537 | 2004-07-20 14:22:26 +0000 | [diff] [blame] | 296 | { |
Miklos Szeredi | 209f5d0 | 2004-07-24 19:56:16 +0000 | [diff] [blame] | 297 | struct fuse_readpages_data *data = _data; |
| 298 | struct fuse_req *req = data->req; |
| 299 | struct inode *inode = data->inode; |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 300 | struct fuse_conn *fc = get_fuse_conn(inode); |
Miklos Szeredi | aa63b6b | 2004-12-03 13:24:35 +0000 | [diff] [blame^] | 301 | |
| 302 | if (req->num_pages && |
Miklos Szeredi | 5886537 | 2004-07-20 14:22:26 +0000 | [diff] [blame] | 303 | (req->num_pages == FUSE_MAX_PAGES_PER_REQ || |
Miklos Szeredi | aa63b6b | 2004-12-03 13:24:35 +0000 | [diff] [blame^] | 304 | (req->num_pages + 1) * PAGE_CACHE_SIZE > fc->max_read || |
Miklos Szeredi | 5886537 | 2004-07-20 14:22:26 +0000 | [diff] [blame] | 305 | req->pages[req->num_pages - 1]->index + 1 != page->index)) { |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 306 | struct fuse_conn *fc = get_fuse_conn(page->mapping->host); |
Miklos Szeredi | 209f5d0 | 2004-07-24 19:56:16 +0000 | [diff] [blame] | 307 | fuse_send_readpages(req, data->file, inode); |
Miklos Szeredi | 08ddb8e | 2004-11-14 09:19:51 +0000 | [diff] [blame] | 308 | data->req = req = fuse_get_request_nonint(fc); |
Miklos Szeredi | 5886537 | 2004-07-20 14:22:26 +0000 | [diff] [blame] | 309 | } |
| 310 | req->pages[req->num_pages] = page; |
| 311 | req->num_pages ++; |
| 312 | return 0; |
| 313 | } |
| 314 | |
| 315 | static int fuse_readpages(struct file *file, struct address_space *mapping, |
| 316 | struct list_head *pages, unsigned nr_pages) |
| 317 | { |
| 318 | struct inode *inode = mapping->host; |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 319 | struct fuse_conn *fc = get_fuse_conn(inode); |
Miklos Szeredi | 209f5d0 | 2004-07-24 19:56:16 +0000 | [diff] [blame] | 320 | struct fuse_readpages_data data; |
| 321 | |
Miklos Szeredi | 08ddb8e | 2004-11-14 09:19:51 +0000 | [diff] [blame] | 322 | data.req = fuse_get_request_nonint(fc); |
Miklos Szeredi | 209f5d0 | 2004-07-24 19:56:16 +0000 | [diff] [blame] | 323 | data.file = file; |
| 324 | data.inode = inode; |
Miklos Szeredi | aa63b6b | 2004-12-03 13:24:35 +0000 | [diff] [blame^] | 325 | |
Miklos Szeredi | 209f5d0 | 2004-07-24 19:56:16 +0000 | [diff] [blame] | 326 | read_cache_pages(mapping, pages, fuse_readpages_fill, &data); |
| 327 | if (data.req->num_pages) |
| 328 | fuse_send_readpages(data.req, file, inode); |
Miklos Szeredi | 5886537 | 2004-07-20 14:22:26 +0000 | [diff] [blame] | 329 | else |
Miklos Szeredi | 209f5d0 | 2004-07-24 19:56:16 +0000 | [diff] [blame] | 330 | fuse_put_request(fc, data.req); |
Miklos Szeredi | 5886537 | 2004-07-20 14:22:26 +0000 | [diff] [blame] | 331 | |
| 332 | return 0; |
| 333 | } |
Miklos Szeredi | 13ed482 | 2004-11-20 11:12:21 +0000 | [diff] [blame] | 334 | #else /* KERNEL_2_6 */ |
Miklos Szeredi | 83a0744 | 2004-11-30 18:25:20 +0000 | [diff] [blame] | 335 | #define FUSE_BLOCK_SHIFT 16 |
| 336 | #define FUSE_BLOCK_SIZE (1UL << FUSE_BLOCK_SHIFT) |
| 337 | #define FUSE_BLOCK_MASK (~(FUSE_BLOCK_SIZE-1)) |
Miklos Szeredi | aa63b6b | 2004-12-03 13:24:35 +0000 | [diff] [blame^] | 338 | #if (1UL << (FUSE_BLOCK_SHIFT - PAGE_CACHE_SHIFT)) > FUSE_MAX_PAGES_PER_REQ |
Miklos Szeredi | 83a0744 | 2004-11-30 18:25:20 +0000 | [diff] [blame] | 339 | #error FUSE_BLOCK_SHIFT too large |
| 340 | #endif |
| 341 | |
| 342 | static int fuse_is_block_uptodate(struct inode *inode, unsigned start, |
| 343 | unsigned end) |
Miklos Szeredi | 36ca556 | 2003-11-03 19:32:14 +0000 | [diff] [blame] | 344 | { |
Miklos Szeredi | 83a0744 | 2004-11-30 18:25:20 +0000 | [diff] [blame] | 345 | int index; |
Miklos Szeredi | 36ca556 | 2003-11-03 19:32:14 +0000 | [diff] [blame] | 346 | |
Miklos Szeredi | 83a0744 | 2004-11-30 18:25:20 +0000 | [diff] [blame] | 347 | for (index = start; index < end; index++) { |
Miklos Szeredi | ad051c3 | 2004-07-02 09:22:50 +0000 | [diff] [blame] | 348 | struct page *page = find_get_page(inode->i_mapping, index); |
Miklos Szeredi | 36ca556 | 2003-11-03 19:32:14 +0000 | [diff] [blame] | 349 | if (!page) |
| 350 | return 0; |
Miklos Szeredi | f85ab24 | 2004-01-07 12:16:45 +0000 | [diff] [blame] | 351 | if (!PageUptodate(page)) { |
Miklos Szeredi | 36ca556 | 2003-11-03 19:32:14 +0000 | [diff] [blame] | 352 | page_cache_release(page); |
| 353 | return 0; |
| 354 | } |
Miklos Szeredi | 36ca556 | 2003-11-03 19:32:14 +0000 | [diff] [blame] | 355 | page_cache_release(page); |
| 356 | } |
Miklos Szeredi | 36ca556 | 2003-11-03 19:32:14 +0000 | [diff] [blame] | 357 | return 1; |
| 358 | } |
| 359 | |
Miklos Szeredi | 83a0744 | 2004-11-30 18:25:20 +0000 | [diff] [blame] | 360 | static void fuse_file_read_block(struct fuse_req *req, struct file *file, |
| 361 | struct inode *inode, unsigned start, |
| 362 | unsigned end) |
Miklos Szeredi | 36ca556 | 2003-11-03 19:32:14 +0000 | [diff] [blame] | 363 | { |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 364 | struct fuse_conn *fc = get_fuse_conn(inode); |
Miklos Szeredi | 83a0744 | 2004-11-30 18:25:20 +0000 | [diff] [blame] | 365 | loff_t pos; |
| 366 | size_t count; |
| 367 | int index; |
| 368 | int err = 1; |
Michael Grigoriev | 37b3f3b | 2003-11-09 15:33:24 +0000 | [diff] [blame] | 369 | int i; |
Miklos Szeredi | 36ca556 | 2003-11-03 19:32:14 +0000 | [diff] [blame] | 370 | |
Miklos Szeredi | 83a0744 | 2004-11-30 18:25:20 +0000 | [diff] [blame] | 371 | for (index = start; index < end; index++) { |
| 372 | struct page *page = grab_cache_page(inode->i_mapping, index); |
Michael Grigoriev | 37b3f3b | 2003-11-09 15:33:24 +0000 | [diff] [blame] | 373 | if (!page) |
Miklos Szeredi | 83a0744 | 2004-11-30 18:25:20 +0000 | [diff] [blame] | 374 | goto out; |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 375 | if (PageUptodate(page)) { |
| 376 | unlock_page(page); |
| 377 | page_cache_release(page); |
| 378 | page = NULL; |
Miklos Szeredi | aa63b6b | 2004-12-03 13:24:35 +0000 | [diff] [blame^] | 379 | } |
Miklos Szeredi | 83a0744 | 2004-11-30 18:25:20 +0000 | [diff] [blame] | 380 | req->pages[req->num_pages++] = page; |
| 381 | } |
Miklos Szeredi | aa63b6b | 2004-12-03 13:24:35 +0000 | [diff] [blame^] | 382 | pos = (loff_t) start << PAGE_CACHE_SHIFT; |
| 383 | count = req->num_pages << PAGE_CACHE_SHIFT; |
Miklos Szeredi | 83a0744 | 2004-11-30 18:25:20 +0000 | [diff] [blame] | 384 | fuse_read_init(req, file, inode, pos, count); |
Miklos Szeredi | 83a0744 | 2004-11-30 18:25:20 +0000 | [diff] [blame] | 385 | request_send(fc, req); |
| 386 | err = req->out.h.error; |
| 387 | out: |
| 388 | for (i = 0; i < req->num_pages; i++) { |
| 389 | struct page *page = req->pages[i]; |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 390 | if (page) { |
| 391 | if (!err) |
| 392 | SetPageUptodate(page); |
| 393 | unlock_page(page); |
| 394 | page_cache_release(page); |
| 395 | } |
Miklos Szeredi | 36ca556 | 2003-11-03 19:32:14 +0000 | [diff] [blame] | 396 | } |
Miklos Szeredi | aa63b6b | 2004-12-03 13:24:35 +0000 | [diff] [blame^] | 397 | } |
Miklos Szeredi | 36ca556 | 2003-11-03 19:32:14 +0000 | [diff] [blame] | 398 | |
Miklos Szeredi | 83a0744 | 2004-11-30 18:25:20 +0000 | [diff] [blame] | 399 | static int fuse_file_bigread(struct file *file, struct inode *inode, |
| 400 | loff_t pos, size_t count) |
Miklos Szeredi | 307242f | 2004-01-26 11:28:44 +0000 | [diff] [blame] | 401 | { |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 402 | struct fuse_conn *fc = get_fuse_conn(inode); |
Miklos Szeredi | 83a0744 | 2004-11-30 18:25:20 +0000 | [diff] [blame] | 403 | unsigned starti; |
| 404 | unsigned endi; |
| 405 | unsigned nexti; |
| 406 | struct fuse_req *req; |
| 407 | loff_t size = i_size_read(inode); |
| 408 | loff_t end = (pos + count + FUSE_BLOCK_SIZE - 1) & FUSE_BLOCK_MASK; |
| 409 | end = min(end, size); |
| 410 | if (end <= pos) |
| 411 | return 0; |
| 412 | |
Miklos Szeredi | aa63b6b | 2004-12-03 13:24:35 +0000 | [diff] [blame^] | 413 | starti = (pos & FUSE_BLOCK_MASK) >> PAGE_CACHE_SHIFT; |
| 414 | endi = (end + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; |
| 415 | |
Miklos Szeredi | 83a0744 | 2004-11-30 18:25:20 +0000 | [diff] [blame] | 416 | req = fuse_get_request(fc); |
| 417 | if (!req) |
| 418 | return -ERESTARTSYS; |
Miklos Szeredi | aa63b6b | 2004-12-03 13:24:35 +0000 | [diff] [blame^] | 419 | |
Miklos Szeredi | 83a0744 | 2004-11-30 18:25:20 +0000 | [diff] [blame] | 420 | for (; starti < endi; starti = nexti) { |
Miklos Szeredi | aa63b6b | 2004-12-03 13:24:35 +0000 | [diff] [blame^] | 421 | nexti = starti + (FUSE_BLOCK_SIZE >> PAGE_CACHE_SHIFT); |
Miklos Szeredi | 83a0744 | 2004-11-30 18:25:20 +0000 | [diff] [blame] | 422 | nexti = min(nexti, endi); |
| 423 | if (!fuse_is_block_uptodate(inode, starti, nexti)) { |
| 424 | fuse_file_read_block(req, file, inode, starti, nexti); |
| 425 | fuse_reset_request(req); |
| 426 | } |
Miklos Szeredi | 307242f | 2004-01-26 11:28:44 +0000 | [diff] [blame] | 427 | } |
Miklos Szeredi | 83a0744 | 2004-11-30 18:25:20 +0000 | [diff] [blame] | 428 | fuse_put_request(fc, req); |
| 429 | return 0; |
Miklos Szeredi | 307242f | 2004-01-26 11:28:44 +0000 | [diff] [blame] | 430 | } |
Miklos Szeredi | 13ed482 | 2004-11-20 11:12:21 +0000 | [diff] [blame] | 431 | #endif /* KERNEL_2_6 */ |
Miklos Szeredi | 307242f | 2004-01-26 11:28:44 +0000 | [diff] [blame] | 432 | |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 433 | static void fuse_write_init(struct fuse_req *req, struct fuse_file *ff, |
| 434 | struct inode *inode, loff_t pos, size_t count, |
| 435 | int iswritepage) |
Miklos Szeredi | a181e61 | 2001-11-06 12:03:23 +0000 | [diff] [blame] | 436 | { |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 437 | struct fuse_write_in *inarg = &req->misc.write.in; |
| 438 | |
| 439 | inarg->writepage = iswritepage; |
| 440 | inarg->fh = ff->fh; |
| 441 | inarg->offset = pos; |
| 442 | inarg->size = count; |
Miklos Szeredi | 7eafcce | 2004-06-19 22:42:38 +0000 | [diff] [blame] | 443 | req->in.h.opcode = FUSE_WRITE; |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 444 | req->in.h.nodeid = get_node_id(inode); |
| 445 | if (iswritepage) { |
| 446 | req->in.h.uid = 0; |
| 447 | req->in.h.gid = 0; |
| 448 | req->in.h.pid = 0; |
| 449 | } |
| 450 | req->in.argpages = 1; |
Miklos Szeredi | 7eafcce | 2004-06-19 22:42:38 +0000 | [diff] [blame] | 451 | req->in.numargs = 2; |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 452 | req->in.args[0].size = sizeof(struct fuse_write_in); |
| 453 | req->in.args[0].value = inarg; |
Miklos Szeredi | 7eafcce | 2004-06-19 22:42:38 +0000 | [diff] [blame] | 454 | req->in.args[1].size = count; |
Miklos Szeredi | ad051c3 | 2004-07-02 09:22:50 +0000 | [diff] [blame] | 455 | req->out.numargs = 1; |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 456 | req->out.args[0].size = sizeof(struct fuse_write_out); |
| 457 | req->out.args[0].value = &req->misc.write.out; |
Miklos Szeredi | a181e61 | 2001-11-06 12:03:23 +0000 | [diff] [blame] | 458 | } |
| 459 | |
Miklos Szeredi | 7c35cf9 | 2004-01-14 16:56:49 +0000 | [diff] [blame] | 460 | static int get_write_count(struct inode *inode, struct page *page) |
Miklos Szeredi | a181e61 | 2001-11-06 12:03:23 +0000 | [diff] [blame] | 461 | { |
Miklos Szeredi | a181e61 | 2001-11-06 12:03:23 +0000 | [diff] [blame] | 462 | unsigned long end_index; |
Miklos Szeredi | d1199f8 | 2004-02-06 15:29:22 +0000 | [diff] [blame] | 463 | loff_t size = i_size_read(inode); |
Miklos Szeredi | 7c35cf9 | 2004-01-14 16:56:49 +0000 | [diff] [blame] | 464 | int count; |
Miklos Szeredi | aa63b6b | 2004-12-03 13:24:35 +0000 | [diff] [blame^] | 465 | |
| 466 | end_index = size >> PAGE_CACHE_SHIFT; |
Miklos Szeredi | c26c14d | 2004-04-09 17:48:32 +0000 | [diff] [blame] | 467 | if (page->index < end_index) |
Miklos Szeredi | aa63b6b | 2004-12-03 13:24:35 +0000 | [diff] [blame^] | 468 | count = PAGE_CACHE_SIZE; |
Miklos Szeredi | a181e61 | 2001-11-06 12:03:23 +0000 | [diff] [blame] | 469 | else { |
Miklos Szeredi | aa63b6b | 2004-12-03 13:24:35 +0000 | [diff] [blame^] | 470 | count = size & (PAGE_CACHE_SIZE - 1); |
Miklos Szeredi | c26c14d | 2004-04-09 17:48:32 +0000 | [diff] [blame] | 471 | if (page->index > end_index || count == 0) |
Miklos Szeredi | 7c35cf9 | 2004-01-14 16:56:49 +0000 | [diff] [blame] | 472 | return 0; |
Miklos Szeredi | a181e61 | 2001-11-06 12:03:23 +0000 | [diff] [blame] | 473 | } |
Miklos Szeredi | 7c35cf9 | 2004-01-14 16:56:49 +0000 | [diff] [blame] | 474 | return count; |
Miklos Szeredi | a181e61 | 2001-11-06 12:03:23 +0000 | [diff] [blame] | 475 | } |
| 476 | |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 477 | static inline struct fuse_file *get_write_file(struct fuse_inode *fi) |
| 478 | { |
| 479 | BUG_ON(list_empty(&fi->write_files)); |
| 480 | return list_entry(fi->write_files.next, struct fuse_file, ff_list); |
| 481 | } |
| 482 | |
Miklos Szeredi | 7c35cf9 | 2004-01-14 16:56:49 +0000 | [diff] [blame] | 483 | #ifdef KERNEL_2_6 |
Miklos Szeredi | 13ed482 | 2004-11-20 11:12:21 +0000 | [diff] [blame] | 484 | static void write_page_end(struct fuse_conn *fc, struct fuse_req *req) |
Miklos Szeredi | 7c35cf9 | 2004-01-14 16:56:49 +0000 | [diff] [blame] | 485 | { |
Miklos Szeredi | 83a0744 | 2004-11-30 18:25:20 +0000 | [diff] [blame] | 486 | struct page *page = req->pages[0]; |
Miklos Szeredi | 069c950 | 2004-07-16 16:17:02 +0000 | [diff] [blame] | 487 | struct inode *inode = page->mapping->host; |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 488 | struct fuse_inode *fi = get_fuse_inode(inode); |
Miklos Szeredi | 5c7e63e | 2004-12-01 23:31:03 +0000 | [diff] [blame] | 489 | if (!req->out.h.error && |
| 490 | req->misc.write.out.size != req->in.args[1].size) |
Miklos Szeredi | ad051c3 | 2004-07-02 09:22:50 +0000 | [diff] [blame] | 491 | req->out.h.error = -EPROTO; |
Miklos Szeredi | ad051c3 | 2004-07-02 09:22:50 +0000 | [diff] [blame] | 492 | |
Miklos Szeredi | 7eafcce | 2004-06-19 22:42:38 +0000 | [diff] [blame] | 493 | if (req->out.h.error) { |
Miklos Szeredi | 7c35cf9 | 2004-01-14 16:56:49 +0000 | [diff] [blame] | 494 | SetPageError(page); |
Miklos Szeredi | 7eafcce | 2004-06-19 22:42:38 +0000 | [diff] [blame] | 495 | if (req->out.h.error == -ENOSPC) |
Miklos Szeredi | 7c35cf9 | 2004-01-14 16:56:49 +0000 | [diff] [blame] | 496 | set_bit(AS_ENOSPC, &page->mapping->flags); |
| 497 | else |
| 498 | set_bit(AS_EIO, &page->mapping->flags); |
| 499 | } |
Miklos Szeredi | 069c950 | 2004-07-16 16:17:02 +0000 | [diff] [blame] | 500 | up_read(&fi->write_sem); |
Miklos Szeredi | 7c35cf9 | 2004-01-14 16:56:49 +0000 | [diff] [blame] | 501 | end_page_writeback(page); |
Miklos Szeredi | 7eafcce | 2004-06-19 22:42:38 +0000 | [diff] [blame] | 502 | fuse_put_request(fc, req); |
Miklos Szeredi | 7c35cf9 | 2004-01-14 16:56:49 +0000 | [diff] [blame] | 503 | } |
| 504 | |
Miklos Szeredi | 13ed482 | 2004-11-20 11:12:21 +0000 | [diff] [blame] | 505 | static int fuse_writepage(struct page *page, struct writeback_control *wbc) |
Miklos Szeredi | 069c950 | 2004-07-16 16:17:02 +0000 | [diff] [blame] | 506 | { |
Miklos Szeredi | 13ed482 | 2004-11-20 11:12:21 +0000 | [diff] [blame] | 507 | struct inode *inode = page->mapping->host; |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 508 | struct fuse_conn *fc = get_fuse_conn(inode); |
| 509 | struct fuse_inode *fi = get_fuse_inode(inode); |
Miklos Szeredi | 069c950 | 2004-07-16 16:17:02 +0000 | [diff] [blame] | 510 | struct fuse_req *req; |
| 511 | int err; |
| 512 | |
| 513 | err = -EWOULDBLOCK; |
Miklos Szeredi | 13ed482 | 2004-11-20 11:12:21 +0000 | [diff] [blame] | 514 | if (wbc->nonblocking) |
| 515 | req = fuse_get_request_nonblock(fc); |
| 516 | else |
| 517 | req = fuse_get_request_nonint(fc); |
Miklos Szeredi | 069c950 | 2004-07-16 16:17:02 +0000 | [diff] [blame] | 518 | if (req) { |
Miklos Szeredi | 13ed482 | 2004-11-20 11:12:21 +0000 | [diff] [blame] | 519 | int locked = 1; |
| 520 | if (wbc->nonblocking) |
| 521 | locked = down_read_trylock(&fi->write_sem); |
| 522 | else |
| 523 | down_read(&fi->write_sem); |
| 524 | if (locked) { |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 525 | unsigned count = get_write_count(inode, page); |
Miklos Szeredi | aa63b6b | 2004-12-03 13:24:35 +0000 | [diff] [blame^] | 526 | loff_t pos = (loff_t) page->index << PAGE_CACHE_SHIFT; |
Miklos Szeredi | 069c950 | 2004-07-16 16:17:02 +0000 | [diff] [blame] | 527 | err = 0; |
Miklos Szeredi | 069c950 | 2004-07-16 16:17:02 +0000 | [diff] [blame] | 528 | if (count) { |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 529 | struct fuse_file *ff = get_write_file(fi); |
| 530 | SetPageWriteback(page); |
| 531 | fuse_write_init(req, ff, inode, pos, count, 1); |
| 532 | req->num_pages = 1; |
| 533 | req->pages[0] = page; |
| 534 | request_send_async(fc, req, write_page_end); |
Miklos Szeredi | 13ed482 | 2004-11-20 11:12:21 +0000 | [diff] [blame] | 535 | goto out; |
Miklos Szeredi | 069c950 | 2004-07-16 16:17:02 +0000 | [diff] [blame] | 536 | } |
| 537 | up_read(&fi->write_sem); |
| 538 | } |
| 539 | fuse_put_request(fc, req); |
| 540 | } |
Miklos Szeredi | 13ed482 | 2004-11-20 11:12:21 +0000 | [diff] [blame] | 541 | if (err == -EWOULDBLOCK) { |
| 542 | #ifdef KERNEL_2_6_6_PLUS |
| 543 | redirty_page_for_writepage(wbc, page); |
Miklos Szeredi | 84ba0f4 | 2004-07-18 11:32:59 +0000 | [diff] [blame] | 544 | #else |
Miklos Szeredi | 13ed482 | 2004-11-20 11:12:21 +0000 | [diff] [blame] | 545 | __set_page_dirty_nobuffers(page); |
Miklos Szeredi | 84ba0f4 | 2004-07-18 11:32:59 +0000 | [diff] [blame] | 546 | #endif |
Miklos Szeredi | 13ed482 | 2004-11-20 11:12:21 +0000 | [diff] [blame] | 547 | err = 0; |
| 548 | } |
| 549 | out: |
Miklos Szeredi | 7c35cf9 | 2004-01-14 16:56:49 +0000 | [diff] [blame] | 550 | unlock_page(page); |
| 551 | return err; |
| 552 | } |
| 553 | #else |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 554 | static int fuse_writepage(struct page *page) |
Miklos Szeredi | 13ed482 | 2004-11-20 11:12:21 +0000 | [diff] [blame] | 555 | { |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 556 | int err; |
Miklos Szeredi | 13ed482 | 2004-11-20 11:12:21 +0000 | [diff] [blame] | 557 | unsigned count; |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 558 | struct inode *inode = page->mapping->host; |
| 559 | struct fuse_conn *fc = get_fuse_conn(inode); |
| 560 | struct fuse_inode *fi = get_fuse_inode(inode); |
| 561 | struct fuse_req *req = fuse_get_request_nonint(fc); |
Miklos Szeredi | 13ed482 | 2004-11-20 11:12:21 +0000 | [diff] [blame] | 562 | |
Miklos Szeredi | 13ed482 | 2004-11-20 11:12:21 +0000 | [diff] [blame] | 563 | down_read(&fi->write_sem); |
| 564 | count = get_write_count(inode, page); |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 565 | err = 0; |
Miklos Szeredi | 13ed482 | 2004-11-20 11:12:21 +0000 | [diff] [blame] | 566 | if (count) { |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 567 | struct fuse_file *ff = get_write_file(fi); |
Miklos Szeredi | aa63b6b | 2004-12-03 13:24:35 +0000 | [diff] [blame^] | 568 | loff_t pos = ((loff_t) page->index << PAGE_CACHE_SHIFT); |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 569 | |
| 570 | fuse_write_init(req, ff, inode, pos, count, 1); |
| 571 | req->num_pages = 1; |
| 572 | req->pages[0] = page; |
| 573 | request_send(fc, req); |
| 574 | err = req->out.h.error; |
| 575 | if (!err && req->misc.write.out.size != count) |
| 576 | err = -EPROTO; |
Miklos Szeredi | 13ed482 | 2004-11-20 11:12:21 +0000 | [diff] [blame] | 577 | } |
| 578 | up_read(&fi->write_sem); |
| 579 | fuse_put_request(fc, req); |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 580 | if (err) |
Miklos Szeredi | 13ed482 | 2004-11-20 11:12:21 +0000 | [diff] [blame] | 581 | SetPageError(page); |
Miklos Szeredi | 7c35cf9 | 2004-01-14 16:56:49 +0000 | [diff] [blame] | 582 | unlock_page(page); |
| 583 | return err; |
| 584 | } |
| 585 | #endif |
Miklos Szeredi | a181e61 | 2001-11-06 12:03:23 +0000 | [diff] [blame] | 586 | |
| 587 | static int fuse_prepare_write(struct file *file, struct page *page, |
| 588 | unsigned offset, unsigned to) |
| 589 | { |
| 590 | /* No op */ |
| 591 | return 0; |
| 592 | } |
| 593 | |
| 594 | static int fuse_commit_write(struct file *file, struct page *page, |
| 595 | unsigned offset, unsigned to) |
| 596 | { |
| 597 | int err; |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 598 | unsigned count = to - offset; |
Miklos Szeredi | a181e61 | 2001-11-06 12:03:23 +0000 | [diff] [blame] | 599 | struct inode *inode = page->mapping->host; |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 600 | struct fuse_file *ff = file->private_data; |
| 601 | struct fuse_conn *fc = get_fuse_conn(inode); |
| 602 | struct fuse_req *req = fuse_get_request(fc); |
Miklos Szeredi | aa63b6b | 2004-12-03 13:24:35 +0000 | [diff] [blame^] | 603 | loff_t pos = ((loff_t) page->index << PAGE_CACHE_SHIFT) + offset; |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 604 | if (!req) |
| 605 | return -ERESTARTSYS; |
Miklos Szeredi | a181e61 | 2001-11-06 12:03:23 +0000 | [diff] [blame] | 606 | |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 607 | fuse_write_init(req, ff, inode, pos, count, 0); |
| 608 | req->num_pages = 1; |
| 609 | req->pages[0] = page; |
| 610 | req->page_offset = offset; |
| 611 | request_send(fc, req); |
| 612 | err = req->out.h.error; |
| 613 | if (!err && req->misc.write.out.size != count) |
| 614 | err = -EPROTO; |
Miklos Szeredi | c26c14d | 2004-04-09 17:48:32 +0000 | [diff] [blame] | 615 | if (!err) { |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 616 | pos += count; |
Miklos Szeredi | c26c14d | 2004-04-09 17:48:32 +0000 | [diff] [blame] | 617 | if (pos > i_size_read(inode)) |
Miklos Szeredi | d1199f8 | 2004-02-06 15:29:22 +0000 | [diff] [blame] | 618 | i_size_write(inode, pos); |
Miklos Szeredi | aa63b6b | 2004-12-03 13:24:35 +0000 | [diff] [blame^] | 619 | |
| 620 | if (offset == 0 && to == PAGE_CACHE_SIZE) { |
Miklos Szeredi | d66d394 | 2004-07-24 13:47:44 +0000 | [diff] [blame] | 621 | #ifdef KERNEL_2_6 |
Miklos Szeredi | 069c950 | 2004-07-16 16:17:02 +0000 | [diff] [blame] | 622 | clear_page_dirty(page); |
Miklos Szeredi | d66d394 | 2004-07-24 13:47:44 +0000 | [diff] [blame] | 623 | #else |
| 624 | ClearPageDirty(page); |
| 625 | #endif |
Miklos Szeredi | 069c950 | 2004-07-16 16:17:02 +0000 | [diff] [blame] | 626 | SetPageUptodate(page); |
| 627 | } |
Miklos Szeredi | a181e61 | 2001-11-06 12:03:23 +0000 | [diff] [blame] | 628 | } |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 629 | fuse_put_request(fc, req); |
Miklos Szeredi | a181e61 | 2001-11-06 12:03:23 +0000 | [diff] [blame] | 630 | return err; |
| 631 | } |
| 632 | |
Miklos Szeredi | 5c7e63e | 2004-12-01 23:31:03 +0000 | [diff] [blame] | 633 | static void fuse_release_user_pages(struct fuse_req *req, int write) |
| 634 | { |
| 635 | unsigned i; |
| 636 | |
| 637 | for (i = 0; i < req->num_pages; i++) { |
| 638 | struct page *page = req->pages[i]; |
| 639 | if (write) { |
| 640 | #ifdef KERNEL_2_6 |
| 641 | set_page_dirty_lock(page); |
| 642 | #else |
| 643 | lock_page(page); |
| 644 | set_page_dirty(page); |
| 645 | unlock_page(page); |
| 646 | #endif |
| 647 | } |
| 648 | page_cache_release(page); |
| 649 | } |
| 650 | } |
| 651 | |
| 652 | static int fuse_get_user_pages(struct fuse_req *req, const char __user *buf, |
| 653 | unsigned nbytes, int write) |
| 654 | { |
| 655 | unsigned long user_addr = (unsigned long) buf; |
| 656 | unsigned offset = user_addr & ~PAGE_MASK; |
| 657 | int npages; |
| 658 | |
| 659 | nbytes = min(nbytes, (unsigned) FUSE_MAX_PAGES_PER_REQ << PAGE_SHIFT); |
| 660 | npages = (nbytes + offset + PAGE_SIZE - 1) >> PAGE_SHIFT; |
| 661 | npages = min(npages, FUSE_MAX_PAGES_PER_REQ); |
| 662 | npages = get_user_pages(current, current->mm, user_addr, npages, write, |
| 663 | 0, req->pages, NULL); |
| 664 | if (npages < 0) |
| 665 | return npages; |
| 666 | |
| 667 | req->num_pages = npages; |
| 668 | req->page_offset = offset; |
| 669 | return 0; |
| 670 | } |
| 671 | |
| 672 | static ssize_t fuse_direct_io(struct file *file, const char __user *buf, |
| 673 | size_t count, loff_t *ppos, int write) |
Miklos Szeredi | ad051c3 | 2004-07-02 09:22:50 +0000 | [diff] [blame] | 674 | { |
| 675 | struct inode *inode = file->f_dentry->d_inode; |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 676 | struct fuse_conn *fc = get_fuse_conn(inode); |
Miklos Szeredi | 209f5d0 | 2004-07-24 19:56:16 +0000 | [diff] [blame] | 677 | struct fuse_file *ff = file->private_data; |
Miklos Szeredi | 5c7e63e | 2004-12-01 23:31:03 +0000 | [diff] [blame] | 678 | unsigned nmax = write ? fc->max_write : fc->max_read; |
Miklos Szeredi | ad051c3 | 2004-07-02 09:22:50 +0000 | [diff] [blame] | 679 | loff_t pos = *ppos; |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 680 | ssize_t res = 0; |
| 681 | struct fuse_req *req = fuse_get_request(fc); |
Miklos Szeredi | 069c950 | 2004-07-16 16:17:02 +0000 | [diff] [blame] | 682 | if (!req) |
| 683 | return -ERESTARTSYS; |
Miklos Szeredi | ad051c3 | 2004-07-02 09:22:50 +0000 | [diff] [blame] | 684 | |
Miklos Szeredi | ad051c3 | 2004-07-02 09:22:50 +0000 | [diff] [blame] | 685 | while (count) { |
Miklos Szeredi | 5c7e63e | 2004-12-01 23:31:03 +0000 | [diff] [blame] | 686 | unsigned tmp; |
| 687 | unsigned nres; |
| 688 | size_t nbytes = min(count, nmax); |
| 689 | int err = fuse_get_user_pages(req, buf, nbytes, !write); |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 690 | if (err) { |
| 691 | res = err; |
Miklos Szeredi | ad051c3 | 2004-07-02 09:22:50 +0000 | [diff] [blame] | 692 | break; |
| 693 | } |
Miklos Szeredi | 5c7e63e | 2004-12-01 23:31:03 +0000 | [diff] [blame] | 694 | tmp = (req->num_pages << PAGE_SHIFT) - req->page_offset; |
| 695 | nbytes = min(nbytes, tmp); |
| 696 | if (write) |
| 697 | fuse_write_init(req, ff, inode, pos, nbytes, 0); |
| 698 | else |
| 699 | fuse_read_init(req, file, inode, pos, nbytes); |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 700 | request_send(fc, req); |
Miklos Szeredi | 5c7e63e | 2004-12-01 23:31:03 +0000 | [diff] [blame] | 701 | fuse_release_user_pages(req, !write); |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 702 | if (req->out.h.error) { |
| 703 | if (!res) |
| 704 | res = req->out.h.error; |
Miklos Szeredi | ad051c3 | 2004-07-02 09:22:50 +0000 | [diff] [blame] | 705 | break; |
| 706 | } |
Miklos Szeredi | 5c7e63e | 2004-12-01 23:31:03 +0000 | [diff] [blame] | 707 | if (write) { |
| 708 | nres = req->misc.write.out.size; |
| 709 | if (nres > nbytes) { |
| 710 | res = -EPROTO; |
| 711 | break; |
| 712 | } |
| 713 | } |
| 714 | else |
| 715 | nres = req->out.args[0].size; |
| 716 | count -= nres; |
| 717 | res += nres; |
| 718 | pos += nres; |
| 719 | buf += nres; |
| 720 | if (nres != nbytes) |
Miklos Szeredi | ad051c3 | 2004-07-02 09:22:50 +0000 | [diff] [blame] | 721 | break; |
Miklos Szeredi | 069c950 | 2004-07-16 16:17:02 +0000 | [diff] [blame] | 722 | if (count) |
| 723 | fuse_reset_request(req); |
Miklos Szeredi | ad051c3 | 2004-07-02 09:22:50 +0000 | [diff] [blame] | 724 | } |
Miklos Szeredi | 069c950 | 2004-07-16 16:17:02 +0000 | [diff] [blame] | 725 | fuse_put_request(fc, req); |
Miklos Szeredi | ad051c3 | 2004-07-02 09:22:50 +0000 | [diff] [blame] | 726 | if (res > 0) { |
Miklos Szeredi | 5c7e63e | 2004-12-01 23:31:03 +0000 | [diff] [blame] | 727 | if (write && pos > i_size_read(inode)) |
Miklos Szeredi | ad051c3 | 2004-07-02 09:22:50 +0000 | [diff] [blame] | 728 | i_size_write(inode, pos); |
| 729 | *ppos = pos; |
| 730 | } |
Miklos Szeredi | ad051c3 | 2004-07-02 09:22:50 +0000 | [diff] [blame] | 731 | return res; |
| 732 | } |
| 733 | |
Miklos Szeredi | 5c7e63e | 2004-12-01 23:31:03 +0000 | [diff] [blame] | 734 | static ssize_t fuse_file_read(struct file *file, char __user *buf, |
| 735 | size_t count, loff_t *ppos) |
| 736 | { |
| 737 | struct inode *inode = file->f_dentry->d_inode; |
| 738 | struct fuse_conn *fc = get_fuse_conn(inode); |
Miklos Szeredi | 5c7e63e | 2004-12-01 23:31:03 +0000 | [diff] [blame] | 739 | |
| 740 | if (fc->flags & FUSE_DIRECT_IO) |
Miklos Szeredi | aa63b6b | 2004-12-03 13:24:35 +0000 | [diff] [blame^] | 741 | return fuse_direct_io(file, buf, count, ppos, 0); |
Miklos Szeredi | 5c7e63e | 2004-12-01 23:31:03 +0000 | [diff] [blame] | 742 | #ifndef KERNEL_2_6 |
Miklos Szeredi | aa63b6b | 2004-12-03 13:24:35 +0000 | [diff] [blame^] | 743 | else { |
Miklos Szeredi | 5c7e63e | 2004-12-01 23:31:03 +0000 | [diff] [blame] | 744 | if (fc->flags & FUSE_LARGE_READ) { |
| 745 | down(&inode->i_sem); |
| 746 | res = fuse_file_bigread(file, inode, *ppos, count); |
| 747 | up(&inode->i_sem); |
| 748 | if (res) |
| 749 | return res; |
| 750 | } |
Miklos Szeredi | aa63b6b | 2004-12-03 13:24:35 +0000 | [diff] [blame^] | 751 | return generic_file_read(file, buf, count, ppos); |
Miklos Szeredi | 5c7e63e | 2004-12-01 23:31:03 +0000 | [diff] [blame] | 752 | } |
Miklos Szeredi | aa63b6b | 2004-12-03 13:24:35 +0000 | [diff] [blame^] | 753 | #else |
| 754 | else |
| 755 | return generic_file_read(file, buf, count, ppos); |
| 756 | #endif |
| 757 | |
| 758 | } |
Miklos Szeredi | 5c7e63e | 2004-12-01 23:31:03 +0000 | [diff] [blame] | 759 | |
Miklos Szeredi | 13ed482 | 2004-11-20 11:12:21 +0000 | [diff] [blame] | 760 | static ssize_t fuse_file_write(struct file *file, const char __user *buf, |
Miklos Szeredi | ad051c3 | 2004-07-02 09:22:50 +0000 | [diff] [blame] | 761 | size_t count, loff_t *ppos) |
| 762 | { |
| 763 | struct inode *inode = file->f_dentry->d_inode; |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 764 | struct fuse_conn *fc = get_fuse_conn(inode); |
Miklos Szeredi | aa63b6b | 2004-12-03 13:24:35 +0000 | [diff] [blame^] | 765 | |
Miklos Szeredi | ad051c3 | 2004-07-02 09:22:50 +0000 | [diff] [blame] | 766 | if (fc->flags & FUSE_DIRECT_IO) { |
| 767 | ssize_t res; |
| 768 | down(&inode->i_sem); |
Miklos Szeredi | 5c7e63e | 2004-12-01 23:31:03 +0000 | [diff] [blame] | 769 | res = fuse_direct_io(file, buf, count, ppos, 1); |
Miklos Szeredi | ad051c3 | 2004-07-02 09:22:50 +0000 | [diff] [blame] | 770 | up(&inode->i_sem); |
| 771 | return res; |
| 772 | } |
Miklos Szeredi | aa63b6b | 2004-12-03 13:24:35 +0000 | [diff] [blame^] | 773 | else |
Miklos Szeredi | ad051c3 | 2004-07-02 09:22:50 +0000 | [diff] [blame] | 774 | return generic_file_write(file, buf, count, ppos); |
| 775 | } |
Miklos Szeredi | aa63b6b | 2004-12-03 13:24:35 +0000 | [diff] [blame^] | 776 | |
Miklos Szeredi | ad051c3 | 2004-07-02 09:22:50 +0000 | [diff] [blame] | 777 | static int fuse_file_mmap(struct file *file, struct vm_area_struct *vma) |
| 778 | { |
| 779 | struct inode *inode = file->f_dentry->d_inode; |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 780 | struct fuse_conn *fc = get_fuse_conn(inode); |
Miklos Szeredi | ad051c3 | 2004-07-02 09:22:50 +0000 | [diff] [blame] | 781 | |
| 782 | if (fc->flags & FUSE_DIRECT_IO) |
| 783 | return -ENODEV; |
Miklos Szeredi | 209f5d0 | 2004-07-24 19:56:16 +0000 | [diff] [blame] | 784 | else { |
Miklos Szeredi | aa63b6b | 2004-12-03 13:24:35 +0000 | [diff] [blame^] | 785 | if ((vma->vm_flags & (VM_WRITE | VM_SHARED)) == |
Miklos Szeredi | 209f5d0 | 2004-07-24 19:56:16 +0000 | [diff] [blame] | 786 | (VM_WRITE | VM_SHARED)) { |
Miklos Szeredi | 039322d | 2004-12-01 18:39:12 +0000 | [diff] [blame] | 787 | struct fuse_inode *fi = get_fuse_inode(inode); |
Miklos Szeredi | 209f5d0 | 2004-07-24 19:56:16 +0000 | [diff] [blame] | 788 | struct fuse_file *ff = file->private_data; |
| 789 | |
| 790 | if (!user_mmap && current->uid != 0) |
| 791 | return -EPERM; |
| 792 | |
| 793 | down_write(&fi->write_sem); |
| 794 | if (list_empty(&ff->ff_list)) |
| 795 | list_add(&ff->ff_list, &fi->write_files); |
| 796 | up_write(&fi->write_sem); |
| 797 | } |
Miklos Szeredi | ad051c3 | 2004-07-02 09:22:50 +0000 | [diff] [blame] | 798 | return generic_file_mmap(file, vma); |
Miklos Szeredi | 209f5d0 | 2004-07-24 19:56:16 +0000 | [diff] [blame] | 799 | } |
Miklos Szeredi | ad051c3 | 2004-07-02 09:22:50 +0000 | [diff] [blame] | 800 | } |
| 801 | |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame] | 802 | static struct file_operations fuse_file_operations = { |
Miklos Szeredi | 89b86af | 2004-02-06 17:02:08 +0000 | [diff] [blame] | 803 | .read = fuse_file_read, |
Miklos Szeredi | ad051c3 | 2004-07-02 09:22:50 +0000 | [diff] [blame] | 804 | .write = fuse_file_write, |
| 805 | .mmap = fuse_file_mmap, |
Miklos Szeredi | 89b86af | 2004-02-06 17:02:08 +0000 | [diff] [blame] | 806 | .open = fuse_open, |
Miklos Szeredi | e2e4ac2 | 2004-05-18 08:45:28 +0000 | [diff] [blame] | 807 | .flush = fuse_flush, |
Miklos Szeredi | 89b86af | 2004-02-06 17:02:08 +0000 | [diff] [blame] | 808 | .release = fuse_release, |
| 809 | .fsync = fuse_fsync, |
| 810 | #ifdef KERNEL_2_6 |
| 811 | .sendfile = generic_file_sendfile, |
| 812 | #endif |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame] | 813 | }; |
| 814 | |
| 815 | static struct address_space_operations fuse_file_aops = { |
Miklos Szeredi | 84ba0f4 | 2004-07-18 11:32:59 +0000 | [diff] [blame] | 816 | .readpage = fuse_readpage, |
| 817 | .writepage = fuse_writepage, |
| 818 | .prepare_write = fuse_prepare_write, |
| 819 | .commit_write = fuse_commit_write, |
Miklos Szeredi | 015fe70 | 2004-07-12 11:52:24 +0000 | [diff] [blame] | 820 | #ifdef KERNEL_2_6 |
Miklos Szeredi | 5886537 | 2004-07-20 14:22:26 +0000 | [diff] [blame] | 821 | .readpages = fuse_readpages, |
Miklos Szeredi | 84ba0f4 | 2004-07-18 11:32:59 +0000 | [diff] [blame] | 822 | .set_page_dirty = __set_page_dirty_nobuffers, |
Miklos Szeredi | 015fe70 | 2004-07-12 11:52:24 +0000 | [diff] [blame] | 823 | #endif |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame] | 824 | }; |
| 825 | |
| 826 | void fuse_init_file_inode(struct inode *inode) |
| 827 | { |
| 828 | inode->i_fop = &fuse_file_operations; |
| 829 | inode->i_data.a_ops = &fuse_file_aops; |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame] | 830 | } |