cregit-Linux how code gets into the kernel

Release 4.10 fs/autofs4/inode.c

Directory: fs/autofs4
 * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved
 * Copyright 2005-2006 Ian Kent <>
 * This file is part of the Linux kernel and is made available under
 * the terms of the GNU General Public License, version 2, or at your
 * option, any later version, incorporated herein by reference.

#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/file.h>
#include <linux/seq_file.h>
#include <linux/pagemap.h>
#include <linux/parser.h>
#include <linux/bitops.h>
#include <linux/magic.h>
#include "autofs_i.h"
#include <linux/module.h>

struct autofs_info *autofs4_new_ino(struct autofs_sb_info *sbi) { struct autofs_info *ino; ino = kzalloc(sizeof(*ino), GFP_KERNEL); if (ino) { INIT_LIST_HEAD(&ino->active); INIT_LIST_HEAD(&ino->expiring); ino->last_used = jiffies; ino->sbi = sbi; } return ino; }


ian kentian kent2334.33%466.67%
al viroal viro1826.87%116.67%

void autofs4_clean_ino(struct autofs_info *ino) { ino->uid = GLOBAL_ROOT_UID; ino->gid = GLOBAL_ROOT_GID; ino->last_used = jiffies; }


ian kentian kent1657.14%240.00%
al viroal viro932.14%120.00%
eric w. biedermaneric w. biederman27.14%120.00%

void autofs4_free_ino(struct autofs_info *ino) { kfree(ino); }



void autofs4_kill_sb(struct super_block *sb) { struct autofs_sb_info *sbi = autofs4_sbi(sb); /* * In the event of a failure in get_sb_nodev the superblock * info is not present so nothing else has been setup, so * just call kill_anon_super when we are called from * deactivate_super. */ if (sbi) { /* Free wait queues, close pipe */ autofs4_catatonic_mode(sbi); put_pid(sbi->oz_pgrp); } pr_debug("shutting down\n"); kill_litter_super(sb); if (sbi) kfree_rcu(sbi, rcu); }


al viroal viro1219.67%220.00%
sukadev bhattiprolusukadev bhattiprolu914.75%110.00%
ian kentian kent711.48%440.00%
david howellsdavid howells58.20%110.00%
jiri kosinajiri kosina11.64%110.00%

static int autofs4_show_options(struct seq_file *m, struct dentry *root) { struct autofs_sb_info *sbi = autofs4_sbi(root->d_sb); struct inode *root_inode = d_inode(root->d_sb->s_root); if (!sbi) return 0; seq_printf(m, ",fd=%d", sbi->pipefd); if (!uid_eq(root_inode->i_uid, GLOBAL_ROOT_UID)) seq_printf(m, ",uid=%u", from_kuid_munged(&init_user_ns, root_inode->i_uid)); if (!gid_eq(root_inode->i_gid, GLOBAL_ROOT_GID)) seq_printf(m, ",gid=%u", from_kgid_munged(&init_user_ns, root_inode->i_gid)); seq_printf(m, ",pgrp=%d", pid_vnr(sbi->oz_pgrp)); seq_printf(m, ",timeout=%lu", sbi->exp_timeout/HZ); seq_printf(m, ",minproto=%d", sbi->min_proto); seq_printf(m, ",maxproto=%d", sbi->max_proto); if (autofs_type_offset(sbi->type)) seq_printf(m, ",offset"); else if (autofs_type_direct(sbi->type)) seq_printf(m, ",direct"); else seq_printf(m, ",indirect"); #ifdef CONFIG_CHECKPOINT_RESTORE if (sbi->pipe) seq_printf(m, ",pipe_ino=%ld", file_inode(sbi->pipe)->i_ino); else seq_printf(m, ",pipe_ino=-1"); #endif return 0; }


ian kentian kent13353.85%330.00%
miklos szeredimiklos szeredi4317.41%110.00%
stanislav kinsburskiystanislav kinsburskiy3212.96%110.00%
eric w. biedermaneric w. biederman249.72%110.00%
al viroal viro93.64%220.00%
sukadev bhattiprolusukadev bhattiprolu31.21%110.00%
david howellsdavid howells31.21%110.00%

static void autofs4_evict_inode(struct inode *inode) { clear_inode(inode); kfree(inode->i_private); }


al viroal viro2295.65%150.00%
jan karajan kara14.35%150.00%

static const struct super_operations autofs4_sops = { .statfs = simple_statfs, .show_options = autofs4_show_options, .evict_inode = autofs4_evict_inode, }; enum {Opt_err, Opt_fd, Opt_uid, Opt_gid, Opt_pgrp, Opt_minproto, Opt_maxproto, Opt_indirect, Opt_direct, Opt_offset}; static const match_table_t tokens = { {Opt_fd, "fd=%u"}, {Opt_uid, "uid=%u"}, {Opt_gid, "gid=%u"}, {Opt_pgrp, "pgrp=%u"}, {Opt_minproto, "minproto=%u"}, {Opt_maxproto, "maxproto=%u"}, {Opt_indirect, "indirect"}, {Opt_direct, "direct"}, {Opt_offset, "offset"}, {Opt_err, NULL} };
static int parse_options(char *options, int *pipefd, kuid_t *uid, kgid_t *gid, int *pgrp, bool *pgrp_set, unsigned int *type, int *minproto, int *maxproto) { char *p; substring_t args[MAX_OPT_ARGS]; int option; *uid = current_uid(); *gid = current_gid(); *minproto = AUTOFS_MIN_PROTO_VERSION; *maxproto = AUTOFS_MAX_PROTO_VERSION; *pipefd = -1; if (!options) return 1; while ((p = strsep(&options, ",")) != NULL) { int token; if (!*p) continue; token = match_token(p, tokens, args); switch (token) { case Opt_fd: if (match_int(args, pipefd)) return 1; break; case Opt_uid: if (match_int(args, &option)) return 1; *uid = make_kuid(current_user_ns(), option); if (!uid_valid(*uid)) return 1; break; case Opt_gid: if (match_int(args, &option)) return 1; *gid = make_kgid(current_user_ns(), option); if (!gid_valid(*gid)) return 1; break; case Opt_pgrp: if (match_int(args, &option)) return 1; *pgrp = option; *pgrp_set = true; break; case Opt_minproto: if (match_int(args, &option)) return 1; *minproto = option; break; case Opt_maxproto: if (match_int(args, &option)) return 1; *maxproto = option; break; case Opt_indirect: set_autofs_type_indirect(type); break; case Opt_direct: set_autofs_type_direct(type); break; case Opt_offset: set_autofs_type_offset(type); break; default: return 1; } } return (*pipefd < 0); }


andrew mortonandrew morton7622.16%110.00%
eric w. biedermaneric w. biederman3811.08%110.00%
ian kentian kent329.33%220.00%
dave jonesdave jones123.50%110.00%
sukadev bhattiprolusukadev bhattiprolu102.92%110.00%
david howellsdavid howells41.17%110.00%

int autofs4_fill_super(struct super_block *s, void *data, int silent) { struct inode *root_inode; struct dentry *root; struct file *pipe; int pipefd; struct autofs_sb_info *sbi; struct autofs_info *ino; int pgrp = 0; bool pgrp_set = false; int ret = -EINVAL; sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); if (!sbi) return -ENOMEM; pr_debug("starting up, sbi = %p\n", sbi); s->s_fs_info = sbi; sbi->magic = AUTOFS_SBI_MAGIC; sbi->pipefd = -1; sbi->pipe = NULL; sbi->catatonic = 1; sbi->exp_timeout = 0; sbi->oz_pgrp = NULL; sbi->sb = s; sbi->version = 0; sbi->sub_version = 0; set_autofs_type_indirect(&sbi->type); sbi->min_proto = 0; sbi->max_proto = 0; mutex_init(&sbi->wq_mutex); mutex_init(&sbi->pipe_mutex); spin_lock_init(&sbi->fs_lock); sbi->queues = NULL; spin_lock_init(&sbi->lookup_lock); INIT_LIST_HEAD(&sbi->active_list); INIT_LIST_HEAD(&sbi->expiring_list); s->s_blocksize = 1024; s->s_blocksize_bits = 10; s->s_magic = AUTOFS_SUPER_MAGIC; s->s_op = &autofs4_sops; s->s_d_op = &autofs4_dentry_operations; s->s_time_gran = 1; /* * Get the root inode and dentry, but defer checking for errors. */ ino = autofs4_new_ino(sbi); if (!ino) { ret = -ENOMEM; goto fail_free; } root_inode = autofs4_get_inode(s, S_IFDIR | 0755); root = d_make_root(root_inode); if (!root) goto fail_ino; pipe = NULL; root->d_fsdata = ino; /* Can this call block? */ if (parse_options(data, &pipefd, &root_inode->i_uid, &root_inode->i_gid, &pgrp, &pgrp_set, &sbi->type, &sbi->min_proto, &sbi->max_proto)) { pr_err("called with bogus options\n"); goto fail_dput; } /* Test versions first */ if (sbi->max_proto < AUTOFS_MIN_PROTO_VERSION || sbi->min_proto > AUTOFS_MAX_PROTO_VERSION) { pr_err("kernel does not match daemon version " "daemon (%d, %d) kernel (%d, %d)\n", sbi->min_proto, sbi->max_proto, AUTOFS_MIN_PROTO_VERSION, AUTOFS_MAX_PROTO_VERSION); goto fail_dput; } /* Establish highest kernel protocol version */ if (sbi->max_proto > AUTOFS_MAX_PROTO_VERSION) sbi->version = AUTOFS_MAX_PROTO_VERSION; else sbi->version = sbi->max_proto; sbi->sub_version = AUTOFS_PROTO_SUBVERSION; if (pgrp_set) { sbi->oz_pgrp = find_get_pid(pgrp); if (!sbi->oz_pgrp) { pr_err("could not find process group %d\n", pgrp); goto fail_dput; } } else { sbi->oz_pgrp = get_task_pid(current, PIDTYPE_PGID); } if (autofs_type_trigger(sbi->type)) __managed_dentry_set_managed(root); root_inode->i_fop = &autofs4_root_operations; root_inode->i_op = &autofs4_dir_inode_operations; pr_debug("pipe fd = %d, pgrp = %u\n", pipefd, pid_nr(sbi->oz_pgrp)); pipe = fget(pipefd); if (!pipe) { pr_err("could not open pipe file descriptor\n"); goto fail_put_pid; } ret = autofs_prepare_pipe(pipe); if (ret < 0) goto fail_fput; sbi->pipe = pipe; sbi->pipefd = pipefd; sbi->catatonic = 0; /* * Success! Install the root dentry now to indicate completion. */ s->s_root = root; return 0; /* * Failure ... clean up. */ fail_fput: pr_err("pipe file descriptor does not contain proper ops\n"); fput(pipe); fail_put_pid: put_pid(sbi->oz_pgrp); fail_dput: dput(root); goto fail_free; fail_ino: autofs4_free_ino(ino); fail_free: kfree(sbi); s->s_fs_info = NULL; return ret; }


ian kentian kent16324.96%1540.54%
tomohiro kusumitomohiro kusumi6910.57%25.41%
sukadev bhattiprolusukadev bhattiprolu629.49%12.70%
andrew mortonandrew morton355.36%410.81%
rui xiangrui xiang243.68%12.70%
al viroal viro172.60%513.51%
david howellsdavid howells71.07%12.70%
andi kleenandi kleen60.92%12.70%
linus torvaldslinus torvalds50.77%12.70%
ingo molnaringo molnar20.31%12.70%
mariusz kozlowskimariusz kozlowski10.15%12.70%
brian gerstbrian gerst10.15%12.70%

struct inode *autofs4_get_inode(struct super_block *sb, umode_t mode) { struct inode *inode = new_inode(sb); if (inode == NULL) return NULL; inode->i_mode = mode; if (sb->s_root) { inode->i_uid = d_inode(sb->s_root)->i_uid; inode->i_gid = d_inode(sb->s_root)->i_gid; } inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode); inode->i_ino = get_next_ino(); if (S_ISDIR(mode)) { set_nlink(inode, 2); inode->i_op = &autofs4_dir_inode_operations; inode->i_fop = &autofs4_dir_operations; } else if (S_ISLNK(mode)) { inode->i_op = &autofs4_symlink_inode_operations; } else WARN_ON(1); return inode; }


christoph hellwigchristoph hellwig74.55%17.69%
david howellsdavid howells63.90%17.69%
tomohiro kusumitomohiro kusumi63.90%17.69%
miklos szeredimiklos szeredi42.60%17.69%
linus torvaldslinus torvalds42.60%17.69%
deepa dinamanideepa dinamani42.60%17.69%
al viroal viro21.30%215.38%
andrew mortonandrew morton10.65%17.69%

Overall Contributors

ian kentian kent40723.46%1925.00%
andrew mortonandrew morton17410.03%67.89%
al viroal viro955.48%1215.79%
sukadev bhattiprolusukadev bhattiprolu844.84%11.32%
tomohiro kusumitomohiro kusumi754.32%33.95%
eric w. biedermaneric w. biederman643.69%11.32%
miklos szeredimiklos szeredi472.71%22.63%
stanislav kinsburskiystanislav kinsburskiy321.84%11.32%
david howellsdavid howells251.44%45.26%
rui xiangrui xiang241.38%11.32%
dave jonesdave jones120.69%11.32%
linus torvaldslinus torvalds100.58%33.95%
christoph hellwigchristoph hellwig80.46%22.63%
hirofumi ogawahirofumi ogawa60.35%11.32%
andi kleenandi kleen60.35%11.32%
deepa dinamanideepa dinamani40.23%11.32%
jeff garzikjeff garzik30.17%11.32%
ingo molnaringo molnar20.12%11.32%
art haasart haas20.12%11.32%
jiri kosinajiri kosina10.06%11.32%
mariusz kozlowskimariusz kozlowski10.06%11.32%
adrian bunkadrian bunk10.06%11.32%
brian gerstbrian gerst10.06%11.32%
jan karajan kara10.06%11.32%
steven whitehousesteven whitehouse10.06%11.32%
josef 'jeff' sipekjosef 'jeff' sipek10.06%11.32%
Directory: fs/autofs4
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