^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) * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/spinlock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/compat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/completion.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/buffer_head.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/pagemap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/uio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/blkdev.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/mount.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/gfs2_ondisk.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/falloc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/swap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/crc32.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/writeback.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/dlm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/dlm_plock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <linux/backing-dev.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include "gfs2.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include "incore.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include "bmap.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include "aops.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #include "dir.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #include "glock.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #include "glops.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #include "inode.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #include "log.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #include "meta_io.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #include "quota.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #include "rgrp.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #include "trans.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #include "util.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) * gfs2_llseek - seek to a location in a file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) * @file: the file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) * @offset: the offset
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) * @whence: Where to seek from (SEEK_SET, SEEK_CUR, or SEEK_END)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) * SEEK_END requires the glock for the file because it references the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) * file's size.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) * Returns: The new offset, or errno
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) static loff_t gfs2_llseek(struct file *file, loff_t offset, int whence)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) struct gfs2_inode *ip = GFS2_I(file->f_mapping->host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) struct gfs2_holder i_gh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) loff_t error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) switch (whence) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) case SEEK_END:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) &i_gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) if (!error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) error = generic_file_llseek(file, offset, whence);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) gfs2_glock_dq_uninit(&i_gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) case SEEK_DATA:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) error = gfs2_seek_data(file, offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) case SEEK_HOLE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) error = gfs2_seek_hole(file, offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) case SEEK_CUR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) case SEEK_SET:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) * These don't reference inode->i_size and don't depend on the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) * block mapping, so we don't need the glock.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) error = generic_file_llseek(file, offset, whence);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) error = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) * gfs2_readdir - Iterator for a directory
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) * @file: The directory to read from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) * @ctx: What to feed directory entries to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) * Returns: errno
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) static int gfs2_readdir(struct file *file, struct dir_context *ctx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) struct inode *dir = file->f_mapping->host;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) struct gfs2_inode *dip = GFS2_I(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) struct gfs2_holder d_gh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) error = gfs2_dir_read(dir, ctx, &file->f_ra);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) gfs2_glock_dq_uninit(&d_gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) * fsflag_gfs2flag
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) * The FS_JOURNAL_DATA_FL flag maps to GFS2_DIF_INHERIT_JDATA for directories,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) * and to GFS2_DIF_JDATA for non-directories.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) static struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) u32 fsflag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) u32 gfsflag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) } fsflag_gfs2flag[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) {FS_SYNC_FL, GFS2_DIF_SYNC},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) {FS_IMMUTABLE_FL, GFS2_DIF_IMMUTABLE},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) {FS_APPEND_FL, GFS2_DIF_APPENDONLY},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) {FS_NOATIME_FL, GFS2_DIF_NOATIME},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) {FS_INDEX_FL, GFS2_DIF_EXHASH},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) {FS_TOPDIR_FL, GFS2_DIF_TOPDIR},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) {FS_JOURNAL_DATA_FL, GFS2_DIF_JDATA | GFS2_DIF_INHERIT_JDATA},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) static inline u32 gfs2_gfsflags_to_fsflags(struct inode *inode, u32 gfsflags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) u32 fsflags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) if (S_ISDIR(inode->i_mode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) gfsflags &= ~GFS2_DIF_JDATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) gfsflags &= ~GFS2_DIF_INHERIT_JDATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) for (i = 0; i < ARRAY_SIZE(fsflag_gfs2flag); i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) if (gfsflags & fsflag_gfs2flag[i].gfsflag)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) fsflags |= fsflag_gfs2flag[i].fsflag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) return fsflags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) static int gfs2_get_flags(struct file *filp, u32 __user *ptr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) struct inode *inode = file_inode(filp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) struct gfs2_inode *ip = GFS2_I(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) struct gfs2_holder gh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) u32 fsflags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) error = gfs2_glock_nq(&gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) goto out_uninit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) fsflags = gfs2_gfsflags_to_fsflags(inode, ip->i_diskflags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) if (put_user(fsflags, ptr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) error = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) gfs2_glock_dq(&gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) out_uninit:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) gfs2_holder_uninit(&gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) void gfs2_set_inode_flags(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) struct gfs2_inode *ip = GFS2_I(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) unsigned int flags = inode->i_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) flags &= ~(S_SYNC|S_APPEND|S_IMMUTABLE|S_NOATIME|S_DIRSYNC|S_NOSEC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) if ((ip->i_eattr == 0) && !is_sxid(inode->i_mode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) flags |= S_NOSEC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) if (ip->i_diskflags & GFS2_DIF_IMMUTABLE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) flags |= S_IMMUTABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) if (ip->i_diskflags & GFS2_DIF_APPENDONLY)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) flags |= S_APPEND;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) if (ip->i_diskflags & GFS2_DIF_NOATIME)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) flags |= S_NOATIME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) if (ip->i_diskflags & GFS2_DIF_SYNC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) flags |= S_SYNC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) inode->i_flags = flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) /* Flags that can be set by user space */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) #define GFS2_FLAGS_USER_SET (GFS2_DIF_JDATA| \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) GFS2_DIF_IMMUTABLE| \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) GFS2_DIF_APPENDONLY| \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) GFS2_DIF_NOATIME| \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) GFS2_DIF_SYNC| \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) GFS2_DIF_TOPDIR| \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) GFS2_DIF_INHERIT_JDATA)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) * do_gfs2_set_flags - set flags on an inode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) * @filp: file pointer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) * @reqflags: The flags to set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) * @mask: Indicates which flags are valid
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) * @fsflags: The FS_* inode flags passed in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) static int do_gfs2_set_flags(struct file *filp, u32 reqflags, u32 mask,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) const u32 fsflags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) struct inode *inode = file_inode(filp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) struct gfs2_inode *ip = GFS2_I(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) struct gfs2_sbd *sdp = GFS2_SB(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) struct buffer_head *bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) struct gfs2_holder gh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) u32 new_flags, flags, oldflags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) error = mnt_want_write_file(filp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) goto out_drop_write;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) oldflags = gfs2_gfsflags_to_fsflags(inode, ip->i_diskflags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) error = vfs_ioc_setflags_prepare(inode, oldflags, fsflags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) error = -EACCES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) if (!inode_owner_or_capable(inode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) error = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) flags = ip->i_diskflags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) new_flags = (flags & ~mask) | (reqflags & mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) if ((new_flags ^ flags) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) error = -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) if (IS_IMMUTABLE(inode) && (new_flags & GFS2_DIF_IMMUTABLE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) if (IS_APPEND(inode) && (new_flags & GFS2_DIF_APPENDONLY))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) if (((new_flags ^ flags) & GFS2_DIF_IMMUTABLE) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) !capable(CAP_LINUX_IMMUTABLE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) if (!IS_IMMUTABLE(inode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) error = gfs2_permission(inode, MAY_WRITE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) if ((flags ^ new_flags) & GFS2_DIF_JDATA) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) if (new_flags & GFS2_DIF_JDATA)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) gfs2_log_flush(sdp, ip->i_gl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) GFS2_LOG_HEAD_FLUSH_NORMAL |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) GFS2_LFC_SET_FLAGS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) error = filemap_fdatawrite(inode->i_mapping);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) error = filemap_fdatawait(inode->i_mapping);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) if (new_flags & GFS2_DIF_JDATA)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) gfs2_ordered_del_inode(ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) error = gfs2_trans_begin(sdp, RES_DINODE, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) error = gfs2_meta_inode_buffer(ip, &bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) goto out_trans_end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) inode->i_ctime = current_time(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) gfs2_trans_add_meta(ip->i_gl, bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) ip->i_diskflags = new_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) gfs2_dinode_out(ip, bh->b_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) gfs2_set_inode_flags(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) gfs2_set_aops(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) out_trans_end:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) gfs2_trans_end(sdp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) gfs2_glock_dq_uninit(&gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) out_drop_write:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) mnt_drop_write_file(filp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) return error;
^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) static int gfs2_set_flags(struct file *filp, u32 __user *ptr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) struct inode *inode = file_inode(filp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) u32 fsflags, gfsflags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) u32 mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) if (get_user(fsflags, ptr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) for (i = 0; i < ARRAY_SIZE(fsflag_gfs2flag); i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) if (fsflags & fsflag_gfs2flag[i].fsflag) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) fsflags &= ~fsflag_gfs2flag[i].fsflag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) gfsflags |= fsflag_gfs2flag[i].gfsflag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) if (fsflags || gfsflags & ~GFS2_FLAGS_USER_SET)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) mask = GFS2_FLAGS_USER_SET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) if (S_ISDIR(inode->i_mode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) mask &= ~GFS2_DIF_JDATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) /* The GFS2_DIF_TOPDIR flag is only valid for directories. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) if (gfsflags & GFS2_DIF_TOPDIR)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) mask &= ~(GFS2_DIF_TOPDIR | GFS2_DIF_INHERIT_JDATA);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) return do_gfs2_set_flags(filp, gfsflags, mask, fsflags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) static int gfs2_getlabel(struct file *filp, char __user *label)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) struct inode *inode = file_inode(filp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) struct gfs2_sbd *sdp = GFS2_SB(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) if (copy_to_user(label, sdp->sd_sb.sb_locktable, GFS2_LOCKNAME_LEN))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) static long gfs2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) switch(cmd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) case FS_IOC_GETFLAGS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) return gfs2_get_flags(filp, (u32 __user *)arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) case FS_IOC_SETFLAGS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) return gfs2_set_flags(filp, (u32 __user *)arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) case FITRIM:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) return gfs2_fitrim(filp, (void __user *)arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) case FS_IOC_GETFSLABEL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) return gfs2_getlabel(filp, (char __user *)arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) return -ENOTTY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) #ifdef CONFIG_COMPAT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) static long gfs2_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) switch(cmd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) /* These are just misnamed, they actually get/put from/to user an int */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) case FS_IOC32_GETFLAGS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) cmd = FS_IOC_GETFLAGS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) case FS_IOC32_SETFLAGS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) cmd = FS_IOC_SETFLAGS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) /* Keep this list in sync with gfs2_ioctl */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) case FITRIM:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) case FS_IOC_GETFSLABEL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) return -ENOIOCTLCMD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) return gfs2_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) #define gfs2_compat_ioctl NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) * gfs2_size_hint - Give a hint to the size of a write request
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) * @filep: The struct file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) * @offset: The file offset of the write
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) * @size: The length of the write
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) * When we are about to do a write, this function records the total
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) * write size in order to provide a suitable hint to the lower layers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) * about how many blocks will be required.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) static void gfs2_size_hint(struct file *filep, loff_t offset, size_t size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) struct inode *inode = file_inode(filep);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) struct gfs2_sbd *sdp = GFS2_SB(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) struct gfs2_inode *ip = GFS2_I(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) size_t blks = (size + sdp->sd_sb.sb_bsize - 1) >> sdp->sd_sb.sb_bsize_shift;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) int hint = min_t(size_t, INT_MAX, blks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) if (hint > atomic_read(&ip->i_sizehint))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) atomic_set(&ip->i_sizehint, hint);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) * gfs2_allocate_page_backing - Allocate blocks for a write fault
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) * @page: The (locked) page to allocate backing for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) * @length: Size of the allocation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) * We try to allocate all the blocks required for the page in one go. This
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) * might fail for various reasons, so we keep trying until all the blocks to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) * back this page are allocated. If some of the blocks are already allocated,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) * that is ok too.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) static int gfs2_allocate_page_backing(struct page *page, unsigned int length)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) u64 pos = page_offset(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) struct iomap iomap = { };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) if (gfs2_iomap_get_alloc(page->mapping->host, pos, length, &iomap))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) if (length < iomap.length)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) iomap.length = length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) length -= iomap.length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) pos += iomap.length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) } while (length > 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) * gfs2_page_mkwrite - Make a shared, mmap()ed, page writable
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) * @vma: The virtual memory area
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) * @vmf: The virtual memory fault containing the page to become writable
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) * When the page becomes writable, we need to ensure that we have
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) * blocks allocated on disk to back that page.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) static vm_fault_t gfs2_page_mkwrite(struct vm_fault *vmf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) struct page *page = vmf->page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) struct inode *inode = file_inode(vmf->vma->vm_file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) struct gfs2_inode *ip = GFS2_I(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) struct gfs2_sbd *sdp = GFS2_SB(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) struct gfs2_alloc_parms ap = { .aflags = 0, };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) u64 offset = page_offset(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) unsigned int data_blocks, ind_blocks, rblocks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) struct gfs2_holder gh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) unsigned int length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) loff_t size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) sb_start_pagefault(inode->i_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) ret = gfs2_glock_nq(&gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) goto out_uninit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) /* Check page index against inode size */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) size = i_size_read(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) if (offset >= size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) /* Update file times before taking page lock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) file_update_time(vmf->vma->vm_file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) /* page is wholly or partially inside EOF */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) if (size - offset < PAGE_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) length = size - offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) length = PAGE_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) gfs2_size_hint(vmf->vma->vm_file, offset, length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) set_bit(GLF_DIRTY, &ip->i_gl->gl_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) set_bit(GIF_SW_PAGED, &ip->i_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) * iomap_writepage / iomap_writepages currently don't support inline
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) * files, so always unstuff here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) if (!gfs2_is_stuffed(ip) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) !gfs2_write_alloc_required(ip, offset, length)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) lock_page(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) if (!PageUptodate(page) || page->mapping != inode->i_mapping) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) ret = -EAGAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) unlock_page(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) ret = gfs2_rindex_update(sdp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) gfs2_write_calc_reserv(ip, length, &data_blocks, &ind_blocks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) ap.target = data_blocks + ind_blocks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) ret = gfs2_quota_lock_check(ip, &ap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) ret = gfs2_inplace_reserve(ip, &ap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) goto out_quota_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) rblocks = RES_DINODE + ind_blocks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) if (gfs2_is_jdata(ip))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) rblocks += data_blocks ? data_blocks : 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) if (ind_blocks || data_blocks) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) rblocks += RES_STATFS + RES_QUOTA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) rblocks += gfs2_rg_blocks(ip, data_blocks + ind_blocks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) ret = gfs2_trans_begin(sdp, rblocks, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) goto out_trans_fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) lock_page(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) ret = -EAGAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) /* If truncated, we must retry the operation, we may have raced
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) * with the glock demotion code.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) if (!PageUptodate(page) || page->mapping != inode->i_mapping)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) goto out_trans_end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) /* Unstuff, if required, and allocate backing blocks for page */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) if (gfs2_is_stuffed(ip))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) ret = gfs2_unstuff_dinode(ip, page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) if (ret == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) ret = gfs2_allocate_page_backing(page, length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) out_trans_end:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) unlock_page(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) gfs2_trans_end(sdp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) out_trans_fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) gfs2_inplace_release(ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) out_quota_unlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) gfs2_quota_unlock(ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) out_unlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) gfs2_glock_dq(&gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) out_uninit:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) gfs2_holder_uninit(&gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) if (ret == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) set_page_dirty(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) wait_for_stable_page(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) sb_end_pagefault(inode->i_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) return block_page_mkwrite_return(ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) static vm_fault_t gfs2_fault(struct vm_fault *vmf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) struct inode *inode = file_inode(vmf->vma->vm_file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) struct gfs2_inode *ip = GFS2_I(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) struct gfs2_holder gh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) vm_fault_t ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) err = gfs2_glock_nq(&gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) ret = block_page_mkwrite_return(err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) goto out_uninit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) ret = filemap_fault(vmf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) gfs2_glock_dq(&gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) out_uninit:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) gfs2_holder_uninit(&gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) static const struct vm_operations_struct gfs2_vm_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) .fault = gfs2_fault,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) .map_pages = filemap_map_pages,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) .page_mkwrite = gfs2_page_mkwrite,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) * gfs2_mmap -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) * @file: The file to map
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) * @vma: The VMA which described the mapping
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) * There is no need to get a lock here unless we should be updating
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) * atime. We ignore any locking errors since the only consequence is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) * a missed atime update (which will just be deferred until later).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) * Returns: 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) static int gfs2_mmap(struct file *file, struct vm_area_struct *vma)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) struct gfs2_inode *ip = GFS2_I(file->f_mapping->host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) if (!(file->f_flags & O_NOATIME) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) !IS_NOATIME(&ip->i_inode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) struct gfs2_holder i_gh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) &i_gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) /* grab lock to update inode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) gfs2_glock_dq_uninit(&i_gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) file_accessed(file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) vma->vm_ops = &gfs2_vm_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) * gfs2_open_common - This is common to open and atomic_open
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) * @inode: The inode being opened
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) * @file: The file being opened
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) * This maybe called under a glock or not depending upon how it has
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) * been called. We must always be called under a glock for regular
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) * files, however. For other file types, it does not matter whether
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) * we hold the glock or not.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) * Returns: Error code or 0 for success
^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) int gfs2_open_common(struct inode *inode, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) struct gfs2_file *fp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) if (S_ISREG(inode->i_mode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) ret = generic_file_open(inode, file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) fp = kzalloc(sizeof(struct gfs2_file), GFP_NOFS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) if (!fp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) mutex_init(&fp->f_fl_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) gfs2_assert_warn(GFS2_SB(inode), !file->private_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) file->private_data = fp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) if (file->f_mode & FMODE_WRITE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) ret = gfs2_qa_get(GFS2_I(inode));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) kfree(file->private_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) file->private_data = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) * gfs2_open - open a file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) * @inode: the inode to open
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) * @file: the struct file for this opening
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) * After atomic_open, this function is only used for opening files
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) * which are already cached. We must still get the glock for regular
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) * files to ensure that we have the file size uptodate for the large
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) * file check which is in the common code. That is only an issue for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) * regular files though.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) * Returns: errno
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) static int gfs2_open(struct inode *inode, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) struct gfs2_inode *ip = GFS2_I(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) struct gfs2_holder i_gh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) bool need_unlock = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) if (S_ISREG(ip->i_inode.i_mode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) &i_gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) need_unlock = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) error = gfs2_open_common(inode, file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) if (need_unlock)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) gfs2_glock_dq_uninit(&i_gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) return error;
^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) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) * gfs2_release - called to close a struct file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) * @inode: the inode the struct file belongs to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) * @file: the struct file being closed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) * Returns: errno
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) static int gfs2_release(struct inode *inode, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) struct gfs2_inode *ip = GFS2_I(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) kfree(file->private_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) file->private_data = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) if (file->f_mode & FMODE_WRITE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) gfs2_rs_delete(ip, &inode->i_writecount);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) gfs2_qa_put(ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) * gfs2_fsync - sync the dirty data for a file (across the cluster)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) * @file: the file that points to the dentry
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) * @start: the start position in the file to sync
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) * @end: the end position in the file to sync
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) * @datasync: set if we can ignore timestamp changes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) * We split the data flushing here so that we don't wait for the data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) * until after we've also sent the metadata to disk. Note that for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) * data=ordered, we will write & wait for the data at the log flush
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) * stage anyway, so this is unlikely to make much of a difference
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) * except in the data=writeback case.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) * If the fdatawrite fails due to any reason except -EIO, we will
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) * continue the remainder of the fsync, although we'll still report
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) * the error at the end. This is to match filemap_write_and_wait_range()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) * behaviour.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) * Returns: errno
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) static int gfs2_fsync(struct file *file, loff_t start, loff_t end,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) int datasync)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) struct address_space *mapping = file->f_mapping;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) struct inode *inode = mapping->host;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) int sync_state = inode->i_state & I_DIRTY_ALL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) struct gfs2_inode *ip = GFS2_I(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) int ret = 0, ret1 = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) if (mapping->nrpages) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) ret1 = filemap_fdatawrite_range(mapping, start, end);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) if (ret1 == -EIO)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) return ret1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) if (!gfs2_is_jdata(ip))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) sync_state &= ~I_DIRTY_PAGES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) if (datasync)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) sync_state &= ~(I_DIRTY_SYNC | I_DIRTY_TIME);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) if (sync_state) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) ret = sync_inode_metadata(inode, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) if (gfs2_is_jdata(ip))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) ret = file_write_and_wait(file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) gfs2_ail_flush(ip->i_gl, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) if (mapping->nrpages)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) ret = file_fdatawait_range(file, start, end);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) return ret ? ret : ret1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) static ssize_t gfs2_file_direct_read(struct kiocb *iocb, struct iov_iter *to,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) struct gfs2_holder *gh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) struct file *file = iocb->ki_filp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) struct gfs2_inode *ip = GFS2_I(file->f_mapping->host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) size_t count = iov_iter_count(to);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) ssize_t ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) if (!count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) return 0; /* skip atime */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) gfs2_holder_init(ip->i_gl, LM_ST_DEFERRED, 0, gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) ret = gfs2_glock_nq(gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) goto out_uninit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) ret = iomap_dio_rw(iocb, to, &gfs2_iomap_ops, NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) is_sync_kiocb(iocb));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) gfs2_glock_dq(gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) out_uninit:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) gfs2_holder_uninit(gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) static ssize_t gfs2_file_direct_write(struct kiocb *iocb, struct iov_iter *from,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) struct gfs2_holder *gh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) struct file *file = iocb->ki_filp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) struct inode *inode = file->f_mapping->host;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) struct gfs2_inode *ip = GFS2_I(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) size_t len = iov_iter_count(from);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) loff_t offset = iocb->ki_pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) ssize_t ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) * Deferred lock, even if its a write, since we do no allocation on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) * this path. All we need to change is the atime, and this lock mode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) * ensures that other nodes have flushed their buffered read caches
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) * (i.e. their page cache entries for this inode). We do not,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) * unfortunately, have the option of only flushing a range like the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) * VFS does.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) gfs2_holder_init(ip->i_gl, LM_ST_DEFERRED, 0, gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) ret = gfs2_glock_nq(gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) goto out_uninit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) /* Silently fall back to buffered I/O when writing beyond EOF */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) if (offset + len > i_size_read(&ip->i_inode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) ret = iomap_dio_rw(iocb, from, &gfs2_iomap_ops, NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) is_sync_kiocb(iocb));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) if (ret == -ENOTBLK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) gfs2_glock_dq(gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) out_uninit:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) gfs2_holder_uninit(gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) static ssize_t gfs2_file_read_iter(struct kiocb *iocb, struct iov_iter *to)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) struct gfs2_inode *ip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) struct gfs2_holder gh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) size_t written = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) ssize_t ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) if (iocb->ki_flags & IOCB_DIRECT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) ret = gfs2_file_direct_read(iocb, to, &gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) if (likely(ret != -ENOTBLK))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) iocb->ki_flags &= ~IOCB_DIRECT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) iocb->ki_flags |= IOCB_NOIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) ret = generic_file_read_iter(iocb, to);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) iocb->ki_flags &= ~IOCB_NOIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) if (ret >= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) if (!iov_iter_count(to))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) written = ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) if (ret != -EAGAIN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) if (iocb->ki_flags & IOCB_NOWAIT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) ip = GFS2_I(iocb->ki_filp->f_mapping->host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) ret = gfs2_glock_nq(&gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) goto out_uninit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) ret = generic_file_read_iter(iocb, to);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) if (ret > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) written += ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) gfs2_glock_dq(&gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) out_uninit:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) gfs2_holder_uninit(&gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) return written ? written : ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) * gfs2_file_write_iter - Perform a write to a file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) * @iocb: The io context
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) * @from: The data to write
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) * We have to do a lock/unlock here to refresh the inode size for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) * O_APPEND writes, otherwise we can land up writing at the wrong
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) * offset. There is still a race, but provided the app is using its
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) * own file locking, this will make O_APPEND work as expected.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) static ssize_t gfs2_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) struct file *file = iocb->ki_filp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) struct inode *inode = file_inode(file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) struct gfs2_inode *ip = GFS2_I(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) struct gfs2_holder gh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) ssize_t ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) gfs2_size_hint(file, iocb->ki_pos, iov_iter_count(from));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) if (iocb->ki_flags & IOCB_APPEND) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) gfs2_glock_dq_uninit(&gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) inode_lock(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) ret = generic_write_checks(iocb, from);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918) if (ret <= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) ret = file_remove_privs(file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923) goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) ret = file_update_time(file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927) goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) if (iocb->ki_flags & IOCB_DIRECT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) struct address_space *mapping = file->f_mapping;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) ssize_t buffered, ret2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933) ret = gfs2_file_direct_write(iocb, from, &gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) if (ret < 0 || !iov_iter_count(from))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) iocb->ki_flags |= IOCB_DSYNC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938) current->backing_dev_info = inode_to_bdi(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) buffered = iomap_file_buffered_write(iocb, from, &gfs2_iomap_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) current->backing_dev_info = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) if (unlikely(buffered <= 0)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942) if (!ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) ret = buffered;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944) goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) * We need to ensure that the page cache pages are written to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) * disk and invalidated to preserve the expected O_DIRECT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950) * semantics. If the writeback or invalidate fails, only report
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951) * the direct I/O range as we don't know if the buffered pages
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952) * made it to disk.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954) iocb->ki_pos += buffered;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) ret2 = generic_write_sync(iocb, buffered);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956) invalidate_mapping_pages(mapping,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957) (iocb->ki_pos - buffered) >> PAGE_SHIFT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) (iocb->ki_pos - 1) >> PAGE_SHIFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959) if (!ret || ret2 > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960) ret += ret2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962) current->backing_dev_info = inode_to_bdi(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963) ret = iomap_file_buffered_write(iocb, from, &gfs2_iomap_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964) current->backing_dev_info = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) if (likely(ret > 0)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966) iocb->ki_pos += ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967) ret = generic_write_sync(iocb, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971) out_unlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972) inode_unlock(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) static int fallocate_chunk(struct inode *inode, loff_t offset, loff_t len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) int mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979) struct super_block *sb = inode->i_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980) struct gfs2_inode *ip = GFS2_I(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981) loff_t end = offset + len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) struct buffer_head *dibh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) error = gfs2_meta_inode_buffer(ip, &dibh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986) if (unlikely(error))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989) gfs2_trans_add_meta(ip->i_gl, dibh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991) if (gfs2_is_stuffed(ip)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992) error = gfs2_unstuff_dinode(ip, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993) if (unlikely(error))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997) while (offset < end) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998) struct iomap iomap = { };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000) error = gfs2_iomap_get_alloc(inode, offset, end - offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001) &iomap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004) offset = iomap.offset + iomap.length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005) if (!(iomap.flags & IOMAP_F_NEW))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007) error = sb_issue_zeroout(sb, iomap.addr >> inode->i_blkbits,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008) iomap.length >> inode->i_blkbits,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009) GFP_NOFS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011) fs_err(GFS2_SB(inode), "Failed to zero data buffers\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016) brelse(dibh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021) * calc_max_reserv() - Reverse of write_calc_reserv. Given a number of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022) * blocks, determine how many bytes can be written.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023) * @ip: The inode in question.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024) * @len: Max cap of bytes. What we return in *len must be <= this.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025) * @data_blocks: Compute and return the number of data blocks needed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026) * @ind_blocks: Compute and return the number of indirect blocks needed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027) * @max_blocks: The total blocks available to work with.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029) * Returns: void, but @len, @data_blocks and @ind_blocks are filled in.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031) static void calc_max_reserv(struct gfs2_inode *ip, loff_t *len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032) unsigned int *data_blocks, unsigned int *ind_blocks,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033) unsigned int max_blocks)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035) loff_t max = *len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036) const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037) unsigned int tmp, max_data = max_blocks - 3 * (sdp->sd_max_height - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039) for (tmp = max_data; tmp > sdp->sd_diptrs;) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040) tmp = DIV_ROUND_UP(tmp, sdp->sd_inptrs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041) max_data -= tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044) *data_blocks = max_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045) *ind_blocks = max_blocks - max_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046) *len = ((loff_t)max_data - 3) << sdp->sd_sb.sb_bsize_shift;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047) if (*len > max) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048) *len = max;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049) gfs2_write_calc_reserv(ip, max, data_blocks, ind_blocks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1053) static long __gfs2_fallocate(struct file *file, int mode, loff_t offset, loff_t len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1054) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1055) struct inode *inode = file_inode(file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1056) struct gfs2_sbd *sdp = GFS2_SB(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1057) struct gfs2_inode *ip = GFS2_I(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1058) struct gfs2_alloc_parms ap = { .aflags = 0, };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1059) unsigned int data_blocks = 0, ind_blocks = 0, rblocks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1060) loff_t bytes, max_bytes, max_blks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1061) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1062) const loff_t pos = offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1063) const loff_t count = len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1064) loff_t bsize_mask = ~((loff_t)sdp->sd_sb.sb_bsize - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1065) loff_t next = (offset + len - 1) >> sdp->sd_sb.sb_bsize_shift;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1066) loff_t max_chunk_size = UINT_MAX & bsize_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1067)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1068) next = (next + 1) << sdp->sd_sb.sb_bsize_shift;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1069)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1070) offset &= bsize_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1071)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1072) len = next - offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1073) bytes = sdp->sd_max_rg_data * sdp->sd_sb.sb_bsize / 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1074) if (!bytes)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1075) bytes = UINT_MAX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1076) bytes &= bsize_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1077) if (bytes == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1078) bytes = sdp->sd_sb.sb_bsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1079)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1080) gfs2_size_hint(file, offset, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1081)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1082) gfs2_write_calc_reserv(ip, PAGE_SIZE, &data_blocks, &ind_blocks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1083) ap.min_target = data_blocks + ind_blocks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1084)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1085) while (len > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1086) if (len < bytes)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1087) bytes = len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1088) if (!gfs2_write_alloc_required(ip, offset, bytes)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1089) len -= bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1090) offset += bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1091) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1092) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1093)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1094) /* We need to determine how many bytes we can actually
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1095) * fallocate without exceeding quota or going over the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1096) * end of the fs. We start off optimistically by assuming
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1097) * we can write max_bytes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1098) max_bytes = (len > max_chunk_size) ? max_chunk_size : len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1099)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1100) /* Since max_bytes is most likely a theoretical max, we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1101) * calculate a more realistic 'bytes' to serve as a good
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1102) * starting point for the number of bytes we may be able
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1103) * to write */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1104) gfs2_write_calc_reserv(ip, bytes, &data_blocks, &ind_blocks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1105) ap.target = data_blocks + ind_blocks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1107) error = gfs2_quota_lock_check(ip, &ap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1108) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1109) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1110) /* ap.allowed tells us how many blocks quota will allow
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1111) * us to write. Check if this reduces max_blks */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1112) max_blks = UINT_MAX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1113) if (ap.allowed)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1114) max_blks = ap.allowed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1116) error = gfs2_inplace_reserve(ip, &ap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1117) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1118) goto out_qunlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1120) /* check if the selected rgrp limits our max_blks further */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1121) if (ap.allowed && ap.allowed < max_blks)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1122) max_blks = ap.allowed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1124) /* Almost done. Calculate bytes that can be written using
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1125) * max_blks. We also recompute max_bytes, data_blocks and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1126) * ind_blocks */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1127) calc_max_reserv(ip, &max_bytes, &data_blocks,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1128) &ind_blocks, max_blks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1130) rblocks = RES_DINODE + ind_blocks + RES_STATFS + RES_QUOTA +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1131) RES_RG_HDR + gfs2_rg_blocks(ip, data_blocks + ind_blocks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1132) if (gfs2_is_jdata(ip))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1133) rblocks += data_blocks ? data_blocks : 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1135) error = gfs2_trans_begin(sdp, rblocks,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1136) PAGE_SIZE >> inode->i_blkbits);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1137) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1138) goto out_trans_fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1140) error = fallocate_chunk(inode, offset, max_bytes, mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1141) gfs2_trans_end(sdp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1143) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1144) goto out_trans_fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1146) len -= max_bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1147) offset += max_bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1148) gfs2_inplace_release(ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1149) gfs2_quota_unlock(ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1150) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1152) if (!(mode & FALLOC_FL_KEEP_SIZE) && (pos + count) > inode->i_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1153) i_size_write(inode, pos + count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1154) file_update_time(file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1155) mark_inode_dirty(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1157) if ((file->f_flags & O_DSYNC) || IS_SYNC(file->f_mapping->host))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1158) return vfs_fsync_range(file, pos, pos + count - 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1159) (file->f_flags & __O_SYNC) ? 0 : 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1160) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1162) out_trans_fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1163) gfs2_inplace_release(ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1164) out_qunlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1165) gfs2_quota_unlock(ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1166) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1167) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1169) static long gfs2_fallocate(struct file *file, int mode, loff_t offset, loff_t len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1170) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1171) struct inode *inode = file_inode(file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1172) struct gfs2_sbd *sdp = GFS2_SB(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1173) struct gfs2_inode *ip = GFS2_I(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1174) struct gfs2_holder gh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1175) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1177) if (mode & ~(FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1178) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1179) /* fallocate is needed by gfs2_grow to reserve space in the rindex */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1180) if (gfs2_is_jdata(ip) && inode != sdp->sd_rindex)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1181) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1183) inode_lock(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1184)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1185) gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1186) ret = gfs2_glock_nq(&gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1187) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1188) goto out_uninit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1190) if (!(mode & FALLOC_FL_KEEP_SIZE) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1191) (offset + len) > inode->i_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1192) ret = inode_newsize_ok(inode, offset + len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1193) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1194) goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1195) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1197) ret = get_write_access(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1198) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1199) goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1201) if (mode & FALLOC_FL_PUNCH_HOLE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1202) ret = __gfs2_punch_hole(file, offset, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1203) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1204) ret = __gfs2_fallocate(file, mode, offset, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1205) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1206) gfs2_rs_deltree(&ip->i_res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1207) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1209) put_write_access(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1210) out_unlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1211) gfs2_glock_dq(&gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1212) out_uninit:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1213) gfs2_holder_uninit(&gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1214) inode_unlock(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1215) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1216) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1218) static ssize_t gfs2_file_splice_write(struct pipe_inode_info *pipe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1219) struct file *out, loff_t *ppos,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1220) size_t len, unsigned int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1221) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1222) ssize_t ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1224) gfs2_size_hint(out, *ppos, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1225)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1226) ret = iter_file_splice_write(pipe, out, ppos, len, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1227) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1228) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1230) #ifdef CONFIG_GFS2_FS_LOCKING_DLM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1231)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1232) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1233) * gfs2_lock - acquire/release a posix lock on a file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1234) * @file: the file pointer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1235) * @cmd: either modify or retrieve lock state, possibly wait
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1236) * @fl: type and range of lock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1237) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1238) * Returns: errno
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1239) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1240)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1241) static int gfs2_lock(struct file *file, int cmd, struct file_lock *fl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1242) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1243) struct gfs2_inode *ip = GFS2_I(file->f_mapping->host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1244) struct gfs2_sbd *sdp = GFS2_SB(file->f_mapping->host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1245) struct lm_lockstruct *ls = &sdp->sd_lockstruct;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1247) if (!(fl->fl_flags & FL_POSIX))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1248) return -ENOLCK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1249) if (__mandatory_lock(&ip->i_inode) && fl->fl_type != F_UNLCK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1250) return -ENOLCK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1252) if (cmd == F_CANCELLK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1253) /* Hack: */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1254) cmd = F_SETLK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1255) fl->fl_type = F_UNLCK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1256) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1257) if (unlikely(gfs2_withdrawn(sdp))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1258) if (fl->fl_type == F_UNLCK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1259) locks_lock_file_wait(file, fl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1260) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1261) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1262) if (IS_GETLK(cmd))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1263) return dlm_posix_get(ls->ls_dlm, ip->i_no_addr, file, fl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1264) else if (fl->fl_type == F_UNLCK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1265) return dlm_posix_unlock(ls->ls_dlm, ip->i_no_addr, file, fl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1266) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1267) return dlm_posix_lock(ls->ls_dlm, ip->i_no_addr, file, cmd, fl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1268) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1269)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1270) static int do_flock(struct file *file, int cmd, struct file_lock *fl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1271) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1272) struct gfs2_file *fp = file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1273) struct gfs2_holder *fl_gh = &fp->f_fl_gh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1274) struct gfs2_inode *ip = GFS2_I(file_inode(file));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1275) struct gfs2_glock *gl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1276) unsigned int state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1277) u16 flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1278) int error = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1279) int sleeptime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1280)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1281) state = (fl->fl_type == F_WRLCK) ? LM_ST_EXCLUSIVE : LM_ST_SHARED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1282) flags = (IS_SETLKW(cmd) ? 0 : LM_FLAG_TRY_1CB) | GL_EXACT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1283)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1284) mutex_lock(&fp->f_fl_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1285)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1286) if (gfs2_holder_initialized(fl_gh)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1287) struct file_lock request;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1288) if (fl_gh->gh_state == state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1289) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1290) locks_init_lock(&request);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1291) request.fl_type = F_UNLCK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1292) request.fl_flags = FL_FLOCK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1293) locks_lock_file_wait(file, &request);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1294) gfs2_glock_dq(fl_gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1295) gfs2_holder_reinit(state, flags, fl_gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1296) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1297) error = gfs2_glock_get(GFS2_SB(&ip->i_inode), ip->i_no_addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1298) &gfs2_flock_glops, CREATE, &gl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1299) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1300) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1301) gfs2_holder_init(gl, state, flags, fl_gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1302) gfs2_glock_put(gl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1303) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1304) for (sleeptime = 1; sleeptime <= 4; sleeptime <<= 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1305) error = gfs2_glock_nq(fl_gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1306) if (error != GLR_TRYFAILED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1307) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1308) fl_gh->gh_flags = LM_FLAG_TRY | GL_EXACT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1309) fl_gh->gh_error = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1310) msleep(sleeptime);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1311) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1312) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1313) gfs2_holder_uninit(fl_gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1314) if (error == GLR_TRYFAILED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1315) error = -EAGAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1316) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1317) error = locks_lock_file_wait(file, fl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1318) gfs2_assert_warn(GFS2_SB(&ip->i_inode), !error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1319) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1320)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1321) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1322) mutex_unlock(&fp->f_fl_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1323) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1324) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1325)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1326) static void do_unflock(struct file *file, struct file_lock *fl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1327) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1328) struct gfs2_file *fp = file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1329) struct gfs2_holder *fl_gh = &fp->f_fl_gh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1330)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1331) mutex_lock(&fp->f_fl_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1332) locks_lock_file_wait(file, fl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1333) if (gfs2_holder_initialized(fl_gh)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1334) gfs2_glock_dq(fl_gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1335) gfs2_holder_uninit(fl_gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1336) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1337) mutex_unlock(&fp->f_fl_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1338) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1339)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1340) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1341) * gfs2_flock - acquire/release a flock lock on a file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1342) * @file: the file pointer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1343) * @cmd: either modify or retrieve lock state, possibly wait
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1344) * @fl: type and range of lock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1345) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1346) * Returns: errno
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1347) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1348)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1349) static int gfs2_flock(struct file *file, int cmd, struct file_lock *fl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1350) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1351) if (!(fl->fl_flags & FL_FLOCK))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1352) return -ENOLCK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1353) if (fl->fl_type & LOCK_MAND)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1354) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1355)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1356) if (fl->fl_type == F_UNLCK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1357) do_unflock(file, fl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1358) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1359) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1360) return do_flock(file, cmd, fl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1361) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1362) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1363)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1364) const struct file_operations gfs2_file_fops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1365) .llseek = gfs2_llseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1366) .read_iter = gfs2_file_read_iter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1367) .write_iter = gfs2_file_write_iter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1368) .iopoll = iomap_dio_iopoll,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1369) .unlocked_ioctl = gfs2_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1370) .compat_ioctl = gfs2_compat_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1371) .mmap = gfs2_mmap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1372) .open = gfs2_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1373) .release = gfs2_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1374) .fsync = gfs2_fsync,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1375) .lock = gfs2_lock,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1376) .flock = gfs2_flock,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1377) .splice_read = generic_file_splice_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1378) .splice_write = gfs2_file_splice_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1379) .setlease = simple_nosetlease,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1380) .fallocate = gfs2_fallocate,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1381) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1382)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1383) const struct file_operations gfs2_dir_fops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1384) .iterate_shared = gfs2_readdir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1385) .unlocked_ioctl = gfs2_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1386) .compat_ioctl = gfs2_compat_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1387) .open = gfs2_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1388) .release = gfs2_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1389) .fsync = gfs2_fsync,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1390) .lock = gfs2_lock,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1391) .flock = gfs2_flock,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1392) .llseek = default_llseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1393) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1394)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1395) #endif /* CONFIG_GFS2_FS_LOCKING_DLM */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1396)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1397) const struct file_operations gfs2_file_fops_nolock = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1398) .llseek = gfs2_llseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1399) .read_iter = gfs2_file_read_iter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1400) .write_iter = gfs2_file_write_iter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1401) .iopoll = iomap_dio_iopoll,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1402) .unlocked_ioctl = gfs2_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1403) .compat_ioctl = gfs2_compat_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1404) .mmap = gfs2_mmap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1405) .open = gfs2_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1406) .release = gfs2_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1407) .fsync = gfs2_fsync,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1408) .splice_read = generic_file_splice_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1409) .splice_write = gfs2_file_splice_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1410) .setlease = generic_setlease,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1411) .fallocate = gfs2_fallocate,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1412) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1413)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1414) const struct file_operations gfs2_dir_fops_nolock = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1415) .iterate_shared = gfs2_readdir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1416) .unlocked_ioctl = gfs2_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1417) .compat_ioctl = gfs2_compat_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1418) .open = gfs2_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1419) .release = gfs2_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1420) .fsync = gfs2_fsync,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1421) .llseek = default_llseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1422) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1423)
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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