^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * linux/fs/9p/vfs_file.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * This file contians vfs file ops for 9P2000.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/stat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/inet.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/list.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/pagemap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/utsname.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/idr.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/uio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <net/9p/9p.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <net/9p/client.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include "v9fs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include "v9fs_vfs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include "fid.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include "cache.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) static const struct vm_operations_struct v9fs_file_vm_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) static const struct vm_operations_struct v9fs_mmap_file_vm_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) * v9fs_file_open - open a file (or directory)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * @inode: inode to be opened
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) * @file: file being opened
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) int v9fs_file_open(struct inode *inode, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) struct v9fs_inode *v9inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) struct v9fs_session_info *v9ses;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) struct p9_fid *fid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) int omode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) p9_debug(P9_DEBUG_VFS, "inode: %p file: %p\n", inode, file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) v9inode = V9FS_I(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) v9ses = v9fs_inode2v9ses(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) if (v9fs_proto_dotl(v9ses))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) omode = v9fs_open_to_dotl_flags(file->f_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) omode = v9fs_uflags2omode(file->f_flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) v9fs_proto_dotu(v9ses));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) fid = file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) if (!fid) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) fid = v9fs_fid_clone(file_dentry(file));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) if (IS_ERR(fid))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) return PTR_ERR(fid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) err = p9_client_open(fid, omode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) if (err < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) p9_client_clunk(fid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) if ((file->f_flags & O_APPEND) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) generic_file_llseek(file, 0, SEEK_END);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) file->private_data = fid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) mutex_lock(&v9inode->v_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) if ((v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) !v9inode->writeback_fid &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) ((file->f_flags & O_ACCMODE) != O_RDONLY)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) * clone a fid and add it to writeback_fid
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) * we do it during open time instead of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) * page dirty time via write_begin/page_mkwrite
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) * because we want write after unlink usecase
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) * to work.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) fid = v9fs_writeback_fid(file_dentry(file));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) if (IS_ERR(fid)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) err = PTR_ERR(fid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) mutex_unlock(&v9inode->v_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) goto out_error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) v9inode->writeback_fid = (void *) fid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) mutex_unlock(&v9inode->v_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) v9fs_cache_inode_set_cookie(inode, file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) out_error:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) p9_client_clunk(file->private_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) file->private_data = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) * v9fs_file_lock - lock a file (or directory)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) * @filp: file to be locked
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) * @cmd: lock command
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) * @fl: file lock structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) * Bugs: this looks like a local only lock, we should extend into 9P
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) * by using open exclusive
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) static int v9fs_file_lock(struct file *filp, int cmd, struct file_lock *fl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) int res = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) struct inode *inode = file_inode(filp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) p9_debug(P9_DEBUG_VFS, "filp: %p lock: %p\n", filp, fl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) /* No mandatory locks */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) if (__mandatory_lock(inode) && fl->fl_type != F_UNLCK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) return -ENOLCK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) if ((IS_SETLK(cmd) || IS_SETLKW(cmd)) && fl->fl_type != F_UNLCK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) filemap_write_and_wait(inode->i_mapping);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) invalidate_mapping_pages(&inode->i_data, 0, -1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) static int v9fs_file_do_lock(struct file *filp, int cmd, struct file_lock *fl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) struct p9_flock flock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) struct p9_fid *fid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) uint8_t status = P9_LOCK_ERROR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) int res = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) unsigned char fl_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) struct v9fs_session_info *v9ses;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) fid = filp->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) BUG_ON(fid == NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) if ((fl->fl_flags & FL_POSIX) != FL_POSIX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) BUG();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) res = locks_lock_file_wait(filp, fl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) if (res < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) /* convert posix lock to p9 tlock args */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) memset(&flock, 0, sizeof(flock));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) /* map the lock type */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) switch (fl->fl_type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) case F_RDLCK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) flock.type = P9_LOCK_TYPE_RDLCK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) case F_WRLCK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) flock.type = P9_LOCK_TYPE_WRLCK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) case F_UNLCK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) flock.type = P9_LOCK_TYPE_UNLCK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) flock.start = fl->fl_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) if (fl->fl_end == OFFSET_MAX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) flock.length = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) flock.length = fl->fl_end - fl->fl_start + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) flock.proc_id = fl->fl_pid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) flock.client_id = fid->clnt->name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) if (IS_SETLKW(cmd))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) flock.flags = P9_LOCK_FLAGS_BLOCK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) v9ses = v9fs_inode2v9ses(file_inode(filp));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) * if its a blocked request and we get P9_LOCK_BLOCKED as the status
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) * for lock request, keep on trying
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) for (;;) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) res = p9_client_lock_dotl(fid, &flock, &status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) if (res < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) if (status != P9_LOCK_BLOCKED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) if (status == P9_LOCK_BLOCKED && !IS_SETLKW(cmd))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) if (schedule_timeout_interruptible(v9ses->session_lock_timeout)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) * p9_client_lock_dotl overwrites flock.client_id with the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) * server message, free and reuse the client name
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) if (flock.client_id != fid->clnt->name) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) kfree(flock.client_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) flock.client_id = fid->clnt->name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) /* map 9p status to VFS status */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) switch (status) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) case P9_LOCK_SUCCESS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) res = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) case P9_LOCK_BLOCKED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) res = -EAGAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) WARN_ONCE(1, "unknown lock status code: %d\n", status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) case P9_LOCK_ERROR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) case P9_LOCK_GRACE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) res = -ENOLCK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) out_unlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) * incase server returned error for lock request, revert
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) * it locally
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) if (res < 0 && fl->fl_type != F_UNLCK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) fl_type = fl->fl_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) fl->fl_type = F_UNLCK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) /* Even if this fails we want to return the remote error */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) locks_lock_file_wait(filp, fl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) fl->fl_type = fl_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) if (flock.client_id != fid->clnt->name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) kfree(flock.client_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) static int v9fs_file_getlock(struct file *filp, struct file_lock *fl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) struct p9_getlock glock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) struct p9_fid *fid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) int res = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) fid = filp->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) BUG_ON(fid == NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) posix_test_lock(filp, fl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) * if we have a conflicting lock locally, no need to validate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) * with server
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) if (fl->fl_type != F_UNLCK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) /* convert posix lock to p9 tgetlock args */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) memset(&glock, 0, sizeof(glock));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) glock.type = P9_LOCK_TYPE_UNLCK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) glock.start = fl->fl_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) if (fl->fl_end == OFFSET_MAX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) glock.length = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) glock.length = fl->fl_end - fl->fl_start + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) glock.proc_id = fl->fl_pid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) glock.client_id = fid->clnt->name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) res = p9_client_getlock_dotl(fid, &glock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) if (res < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) /* map 9p lock type to os lock type */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) switch (glock.type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) case P9_LOCK_TYPE_RDLCK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) fl->fl_type = F_RDLCK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) case P9_LOCK_TYPE_WRLCK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) fl->fl_type = F_WRLCK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) case P9_LOCK_TYPE_UNLCK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) fl->fl_type = F_UNLCK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) if (glock.type != P9_LOCK_TYPE_UNLCK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) fl->fl_start = glock.start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) if (glock.length == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) fl->fl_end = OFFSET_MAX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) fl->fl_end = glock.start + glock.length - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) fl->fl_pid = -glock.proc_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) if (glock.client_id != fid->clnt->name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) kfree(glock.client_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) * v9fs_file_lock_dotl - lock a file (or directory)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) * @filp: file to be locked
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) * @cmd: lock command
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) * @fl: file lock structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) static int v9fs_file_lock_dotl(struct file *filp, int cmd, struct file_lock *fl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) struct inode *inode = file_inode(filp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) int ret = -ENOLCK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) p9_debug(P9_DEBUG_VFS, "filp: %p cmd:%d lock: %p name: %pD\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) filp, cmd, fl, filp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) /* No mandatory locks */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) if (__mandatory_lock(inode) && fl->fl_type != F_UNLCK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) goto out_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) if ((IS_SETLK(cmd) || IS_SETLKW(cmd)) && fl->fl_type != F_UNLCK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) filemap_write_and_wait(inode->i_mapping);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) invalidate_mapping_pages(&inode->i_data, 0, -1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) if (IS_SETLK(cmd) || IS_SETLKW(cmd))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) ret = v9fs_file_do_lock(filp, cmd, fl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) else if (IS_GETLK(cmd))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) ret = v9fs_file_getlock(filp, fl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) out_err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) * v9fs_file_flock_dotl - lock a file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) * @filp: file to be locked
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) * @cmd: lock command
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) * @fl: file lock structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) static int v9fs_file_flock_dotl(struct file *filp, int cmd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) struct file_lock *fl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) struct inode *inode = file_inode(filp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) int ret = -ENOLCK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) p9_debug(P9_DEBUG_VFS, "filp: %p cmd:%d lock: %p name: %pD\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) filp, cmd, fl, filp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) /* No mandatory locks */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) if (__mandatory_lock(inode) && fl->fl_type != F_UNLCK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) goto out_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) if (!(fl->fl_flags & FL_FLOCK))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) goto out_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) if ((IS_SETLK(cmd) || IS_SETLKW(cmd)) && fl->fl_type != F_UNLCK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) filemap_write_and_wait(inode->i_mapping);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) invalidate_mapping_pages(&inode->i_data, 0, -1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) /* Convert flock to posix lock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) fl->fl_flags |= FL_POSIX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) fl->fl_flags ^= FL_FLOCK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) if (IS_SETLK(cmd) | IS_SETLKW(cmd))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) ret = v9fs_file_do_lock(filp, cmd, fl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) out_err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) * v9fs_file_read - read from a file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) * @filp: file pointer to read
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) * @udata: user data buffer to read data into
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) * @count: size of buffer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) * @offset: offset at which to read data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) static ssize_t
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) v9fs_file_read_iter(struct kiocb *iocb, struct iov_iter *to)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) struct p9_fid *fid = iocb->ki_filp->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) int ret, err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) p9_debug(P9_DEBUG_VFS, "count %zu offset %lld\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) iov_iter_count(to), iocb->ki_pos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) if (iocb->ki_filp->f_flags & O_NONBLOCK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) ret = p9_client_read_once(fid, iocb->ki_pos, to, &err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) ret = p9_client_read(fid, iocb->ki_pos, to, &err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) if (!ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) iocb->ki_pos += ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) * v9fs_file_write - write to a file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) * @filp: file pointer to write
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) * @data: data buffer to write data from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) * @count: size of buffer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) * @offset: offset at which to write data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) static ssize_t
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) v9fs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) struct file *file = iocb->ki_filp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) ssize_t retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) loff_t origin;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) retval = generic_write_checks(iocb, from);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) if (retval <= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) origin = iocb->ki_pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) retval = p9_client_write(file->private_data, iocb->ki_pos, from, &err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) if (retval > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) struct inode *inode = file_inode(file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) loff_t i_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) unsigned long pg_start, pg_end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) pg_start = origin >> PAGE_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) pg_end = (origin + retval - 1) >> PAGE_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) if (inode->i_mapping && inode->i_mapping->nrpages)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) invalidate_inode_pages2_range(inode->i_mapping,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) pg_start, pg_end);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) iocb->ki_pos += retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) i_size = i_size_read(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) if (iocb->ki_pos > i_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) inode_add_bytes(inode, iocb->ki_pos - i_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) * Need to serialize against i_size_write() in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) * v9fs_stat2inode()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) v9fs_i_size_write(inode, iocb->ki_pos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) static int v9fs_file_fsync(struct file *filp, loff_t start, loff_t end,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) int datasync)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) struct p9_fid *fid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) struct inode *inode = filp->f_mapping->host;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) struct p9_wstat wstat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) int retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) retval = file_write_and_wait_range(filp, start, end);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) if (retval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) inode_lock(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) p9_debug(P9_DEBUG_VFS, "filp %p datasync %x\n", filp, datasync);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) fid = filp->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) v9fs_blank_wstat(&wstat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) retval = p9_client_wstat(fid, &wstat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) inode_unlock(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) int v9fs_file_fsync_dotl(struct file *filp, loff_t start, loff_t end,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) int datasync)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) struct p9_fid *fid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) struct inode *inode = filp->f_mapping->host;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) int retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) retval = file_write_and_wait_range(filp, start, end);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) if (retval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) inode_lock(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) p9_debug(P9_DEBUG_VFS, "filp %p datasync %x\n", filp, datasync);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) fid = filp->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) retval = p9_client_fsync(fid, datasync);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) inode_unlock(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) v9fs_file_mmap(struct file *filp, struct vm_area_struct *vma)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) int retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) retval = generic_file_mmap(filp, vma);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) if (!retval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) vma->vm_ops = &v9fs_file_vm_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) v9fs_mmap_file_mmap(struct file *filp, struct vm_area_struct *vma)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) int retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) struct inode *inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) struct v9fs_inode *v9inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) struct p9_fid *fid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) inode = file_inode(filp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) v9inode = V9FS_I(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) mutex_lock(&v9inode->v_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) if (!v9inode->writeback_fid &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) (vma->vm_flags & VM_SHARED) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) (vma->vm_flags & VM_WRITE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) * clone a fid and add it to writeback_fid
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) * we do it during mmap instead of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) * page dirty time via write_begin/page_mkwrite
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) * because we want write after unlink usecase
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) * to work.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) fid = v9fs_writeback_fid(file_dentry(filp));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) if (IS_ERR(fid)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) retval = PTR_ERR(fid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) mutex_unlock(&v9inode->v_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) v9inode->writeback_fid = (void *) fid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) mutex_unlock(&v9inode->v_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) retval = generic_file_mmap(filp, vma);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) if (!retval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) vma->vm_ops = &v9fs_mmap_file_vm_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) static vm_fault_t
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) v9fs_vm_page_mkwrite(struct vm_fault *vmf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) struct v9fs_inode *v9inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) struct page *page = vmf->page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) struct file *filp = vmf->vma->vm_file;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) struct inode *inode = file_inode(filp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) p9_debug(P9_DEBUG_VFS, "page %p fid %lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) page, (unsigned long)filp->private_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) /* Update file times before taking page lock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) file_update_time(filp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) v9inode = V9FS_I(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) /* make sure the cache has finished storing the page */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) v9fs_fscache_wait_on_page_write(inode, page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) BUG_ON(!v9inode->writeback_fid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) lock_page(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) if (page->mapping != inode->i_mapping)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) wait_for_stable_page(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) return VM_FAULT_LOCKED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) out_unlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) unlock_page(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) return VM_FAULT_NOPAGE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) * v9fs_mmap_file_read - read from a file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) * @filp: file pointer to read
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) * @data: user data buffer to read data into
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) * @count: size of buffer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) * @offset: offset at which to read data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) static ssize_t
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) v9fs_mmap_file_read_iter(struct kiocb *iocb, struct iov_iter *to)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) /* TODO: Check if there are dirty pages */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) return v9fs_file_read_iter(iocb, to);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) * v9fs_mmap_file_write - write to a file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) * @filp: file pointer to write
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) * @data: data buffer to write data from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) * @count: size of buffer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) * @offset: offset at which to write data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) static ssize_t
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) v9fs_mmap_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) * TODO: invalidate mmaps on filp's inode between
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) * offset and offset+count
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) return v9fs_file_write_iter(iocb, from);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) static void v9fs_mmap_vm_close(struct vm_area_struct *vma)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) struct inode *inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) struct writeback_control wbc = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) .nr_to_write = LONG_MAX,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) .sync_mode = WB_SYNC_ALL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) .range_start = (loff_t)vma->vm_pgoff * PAGE_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) /* absolute end, byte at end included */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) .range_end = (loff_t)vma->vm_pgoff * PAGE_SIZE +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) (vma->vm_end - vma->vm_start - 1),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) if (!(vma->vm_flags & VM_SHARED))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) p9_debug(P9_DEBUG_VFS, "9p VMA close, %p, flushing", vma);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) inode = file_inode(vma->vm_file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) if (!mapping_can_writeback(inode->i_mapping))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) wbc.nr_to_write = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) might_sleep();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) sync_inode(inode, &wbc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) static const struct vm_operations_struct v9fs_file_vm_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) .fault = filemap_fault,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) .map_pages = filemap_map_pages,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) .page_mkwrite = v9fs_vm_page_mkwrite,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) static const struct vm_operations_struct v9fs_mmap_file_vm_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) .close = v9fs_mmap_vm_close,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) .fault = filemap_fault,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) .map_pages = filemap_map_pages,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) .page_mkwrite = v9fs_vm_page_mkwrite,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) const struct file_operations v9fs_cached_file_operations = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) .llseek = generic_file_llseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) .read_iter = generic_file_read_iter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) .write_iter = generic_file_write_iter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) .open = v9fs_file_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) .release = v9fs_dir_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) .lock = v9fs_file_lock,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) .mmap = v9fs_file_mmap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) .splice_read = generic_file_splice_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) .splice_write = iter_file_splice_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) .fsync = v9fs_file_fsync,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) const struct file_operations v9fs_cached_file_operations_dotl = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) .llseek = generic_file_llseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) .read_iter = generic_file_read_iter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) .write_iter = generic_file_write_iter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) .open = v9fs_file_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) .release = v9fs_dir_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) .lock = v9fs_file_lock_dotl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) .flock = v9fs_file_flock_dotl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) .mmap = v9fs_file_mmap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) .splice_read = generic_file_splice_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) .splice_write = iter_file_splice_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) .fsync = v9fs_file_fsync_dotl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) const struct file_operations v9fs_file_operations = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) .llseek = generic_file_llseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) .read_iter = v9fs_file_read_iter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) .write_iter = v9fs_file_write_iter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) .open = v9fs_file_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) .release = v9fs_dir_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) .lock = v9fs_file_lock,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) .mmap = generic_file_readonly_mmap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) .splice_read = generic_file_splice_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) .splice_write = iter_file_splice_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) .fsync = v9fs_file_fsync,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) const struct file_operations v9fs_file_operations_dotl = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) .llseek = generic_file_llseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) .read_iter = v9fs_file_read_iter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) .write_iter = v9fs_file_write_iter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) .open = v9fs_file_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) .release = v9fs_dir_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) .lock = v9fs_file_lock_dotl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) .flock = v9fs_file_flock_dotl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) .mmap = generic_file_readonly_mmap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) .splice_read = generic_file_splice_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) .splice_write = iter_file_splice_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) .fsync = v9fs_file_fsync_dotl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) const struct file_operations v9fs_mmap_file_operations = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) .llseek = generic_file_llseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) .read_iter = v9fs_mmap_file_read_iter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) .write_iter = v9fs_mmap_file_write_iter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) .open = v9fs_file_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) .release = v9fs_dir_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) .lock = v9fs_file_lock,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) .mmap = v9fs_mmap_file_mmap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) .splice_read = generic_file_splice_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) .splice_write = iter_file_splice_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) .fsync = v9fs_file_fsync,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) const struct file_operations v9fs_mmap_file_operations_dotl = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) .llseek = generic_file_llseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) .read_iter = v9fs_mmap_file_read_iter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) .write_iter = v9fs_mmap_file_write_iter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) .open = v9fs_file_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) .release = v9fs_dir_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) .lock = v9fs_file_lock_dotl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) .flock = v9fs_file_flock_dotl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) .mmap = v9fs_mmap_file_mmap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) .splice_read = generic_file_splice_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) .splice_write = iter_file_splice_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) .fsync = v9fs_file_fsync_dotl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) };
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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