cregit-Linux how code gets into the kernel

Release 4.10 fs/gfs2/export.c

Directory: fs/gfs2
 * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
 * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
 * This copyrighted material is made available to anyone wishing to use,
 * modify, copy, or redistribute it subject to the terms and conditions
 * of the GNU General Public License version 2.

#include <linux/spinlock.h>
#include <linux/completion.h>
#include <linux/buffer_head.h>
#include <linux/exportfs.h>
#include <linux/gfs2_ondisk.h>
#include <linux/crc32.h>

#include "gfs2.h"
#include "incore.h"
#include "dir.h"
#include "glock.h"
#include "glops.h"
#include "inode.h"
#include "super.h"
#include "rgrp.h"
#include "util.h"

#define GFS2_SMALL_FH_SIZE 4

#define GFS2_LARGE_FH_SIZE 8

#define GFS2_OLD_FH_SIZE 10

static int gfs2_encode_fh(struct inode *inode, __u32 *p, int *len, struct inode *parent) { __be32 *fh = (__force __be32 *)p; struct super_block *sb = inode->i_sb; struct gfs2_inode *ip = GFS2_I(inode); if (parent && (*len < GFS2_LARGE_FH_SIZE)) { *len = GFS2_LARGE_FH_SIZE; return FILEID_INVALID; } else if (*len < GFS2_SMALL_FH_SIZE) { *len = GFS2_SMALL_FH_SIZE; return FILEID_INVALID; } fh[0] = cpu_to_be32(ip->i_no_formal_ino >> 32); fh[1] = cpu_to_be32(ip->i_no_formal_ino & 0xFFFFFFFF); fh[2] = cpu_to_be32(ip->i_no_addr >> 32); fh[3] = cpu_to_be32(ip->i_no_addr & 0xFFFFFFFF); *len = GFS2_SMALL_FH_SIZE; if (!parent || inode == d_inode(sb->s_root)) return *len; ip = GFS2_I(parent); fh[4] = cpu_to_be32(ip->i_no_formal_ino >> 32); fh[5] = cpu_to_be32(ip->i_no_formal_ino & 0xFFFFFFFF); fh[6] = cpu_to_be32(ip->i_no_addr >> 32); fh[7] = cpu_to_be32(ip->i_no_addr & 0xFFFFFFFF); *len = GFS2_LARGE_FH_SIZE; return *len; }


david teiglanddavid teigland15161.89%19.09%
al viroal viro3715.16%218.18%
steven whitehousesteven whitehouse2610.66%545.45%
aneesh kumaraneesh kumar2510.25%19.09%
david howellsdavid howells31.23%19.09%
namjae jeonnamjae jeon20.82%19.09%

struct get_name_filldir { struct dir_context ctx; struct gfs2_inum_host inum; char *name; };
static int get_name_filldir(struct dir_context *ctx, const char *name, int length, loff_t offset, u64 inum, unsigned int type) { struct get_name_filldir *gnfd = container_of(ctx, struct get_name_filldir, ctx); if (inum != gnfd->inum.no_addr) return 0; memcpy(gnfd->name, name, length); gnfd->name[length] = 0; return 1; }


david teiglanddavid teigland6378.75%133.33%
miklos szeredimiklos szeredi1215.00%133.33%
steven whitehousesteven whitehouse56.25%133.33%

static int gfs2_get_name(struct dentry *parent, char *name, struct dentry *child) { struct inode *dir = d_inode(parent); struct inode *inode = d_inode(child); struct gfs2_inode *dip, *ip; struct get_name_filldir gnfd = { = get_name_filldir, .name = name }; struct gfs2_holder gh; int error; struct file_ra_state f_ra = { .start = 0 }; if (!dir) return -EINVAL; if (!S_ISDIR(dir->i_mode) || !inode) return -EINVAL; dip = GFS2_I(dir); ip = GFS2_I(inode); *name = 0; gnfd.inum.no_addr = ip->i_no_addr; gnfd.inum.no_formal_ino = ip->i_no_formal_ino; error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &gh); if (error) return error; error = gfs2_dir_read(dir, &gnfd.ctx, &f_ra); gfs2_glock_dq_uninit(&gh); if (!error && !*name) error = -ENOENT; return error; }


david teiglanddavid teigland15473.33%112.50%
steven whitehousesteven whitehouse209.52%337.50%
al viroal viro167.62%225.00%
robert s. petersonrobert s. peterson146.67%112.50%
david howellsdavid howells62.86%112.50%

static struct dentry *gfs2_get_parent(struct dentry *child) { return d_obtain_alias(gfs2_lookupi(d_inode(child), &gfs2_qdotdot, 1)); }


david teiglanddavid teigland2170.00%116.67%
david howellsdavid howells310.00%116.67%
christoph hellwigchristoph hellwig310.00%116.67%
steven whitehousesteven whitehouse26.67%233.33%
al viroal viro13.33%116.67%

static struct dentry *gfs2_get_dentry(struct super_block *sb, struct gfs2_inum_host *inum) { struct gfs2_sbd *sdp = sb->s_fs_info; struct inode *inode; inode = gfs2_lookup_by_inum(sdp, inum->no_addr, &inum->no_formal_ino, GFS2_BLKST_DINODE); if (IS_ERR(inode)) return ERR_CAST(inode); return d_obtain_alias(inode); }


david teiglanddavid teigland5173.91%112.50%
steven whitehousesteven whitehouse1318.84%450.00%
christoph hellwigchristoph hellwig45.80%225.00%
al viroal viro11.45%112.50%

static struct dentry *gfs2_fh_to_dentry(struct super_block *sb, struct fid *fid, int fh_len, int fh_type) { struct gfs2_inum_host this; __be32 *fh = (__force __be32 *)fid->raw; switch (fh_type) { case GFS2_SMALL_FH_SIZE: case GFS2_LARGE_FH_SIZE: case GFS2_OLD_FH_SIZE: if (fh_len < GFS2_SMALL_FH_SIZE) return NULL; this.no_formal_ino = ((u64)be32_to_cpu(fh[0])) << 32; this.no_formal_ino |= be32_to_cpu(fh[1]); this.no_addr = ((u64)be32_to_cpu(fh[2])) << 32; this.no_addr |= be32_to_cpu(fh[3]); return gfs2_get_dentry(sb, &this); default: return NULL; } }


christoph hellwigchristoph hellwig13193.57%150.00%
hugh dickinshugh dickins96.43%150.00%

static struct dentry *gfs2_fh_to_parent(struct super_block *sb, struct fid *fid, int fh_len, int fh_type) { struct gfs2_inum_host parent; __be32 *fh = (__force __be32 *)fid->raw; switch (fh_type) { case GFS2_LARGE_FH_SIZE: case GFS2_OLD_FH_SIZE: if (fh_len < GFS2_LARGE_FH_SIZE) return NULL; parent.no_formal_ino = ((u64)be32_to_cpu(fh[4])) << 32; parent.no_formal_ino |= be32_to_cpu(fh[5]); parent.no_addr = ((u64)be32_to_cpu(fh[6])) << 32; parent.no_addr |= be32_to_cpu(fh[7]); return gfs2_get_dentry(sb, &parent); default: return NULL; } }


christoph hellwigchristoph hellwig12893.43%150.00%
hugh dickinshugh dickins96.57%150.00%

const struct export_operations gfs2_export_ops = { .encode_fh = gfs2_encode_fh, .fh_to_dentry = gfs2_fh_to_dentry, .fh_to_parent = gfs2_fh_to_parent, .get_name = gfs2_get_name, .get_parent = gfs2_get_parent, };

Overall Contributors

david teiglanddavid teigland50049.16%12.86%
christoph hellwigchristoph hellwig27927.43%411.43%
steven whitehousesteven whitehouse939.14%1645.71%
al viroal viro605.90%617.14%
aneesh kumaraneesh kumar252.46%12.86%
hugh dickinshugh dickins181.77%12.86%
robert s. petersonrobert s. peterson141.38%12.86%
miklos szeredimiklos szeredi121.18%12.86%
david howellsdavid howells121.18%12.86%
namjae jeonnamjae jeon20.20%12.86%
fabio massimo di nittofabio massimo di nitto10.10%12.86%
wendy chengwendy cheng10.10%12.86%
Directory: fs/gfs2
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