cregit-Linux how code gets into the kernel

Release 4.11 fs/exofs/namei.c

Directory: fs/exofs
/*
 * Copyright (C) 2005, 2006
 * Avishay Traeger (avishay@gmail.com)
 * Copyright (C) 2008, 2009
 * Boaz Harrosh <ooo@electrozaur.com>
 *
 * Copyrights for code taken from ext2:
 *     Copyright (C) 1992, 1993, 1994, 1995
 *     Remy Card (card@masi.ibp.fr)
 *     Laboratoire MASI - Institut Blaise Pascal
 *     Universite Pierre et Marie Curie (Paris VI)
 *     from
 *     linux/fs/minix/inode.c
 *     Copyright (C) 1991, 1992  Linus Torvalds
 *
 * This file is part of exofs.
 *
 * exofs is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation.  Since it is based on ext2, and the only
 * valid version of GPL for the Linux kernel is version 2, the only valid
 * version of GPL for exofs is version 2.
 *
 * exofs is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with exofs; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include "exofs.h"


static inline int exofs_add_nondir(struct dentry *dentry, struct inode *inode) { int err = exofs_add_link(dentry, inode); if (!err) { d_instantiate(dentry, inode); return 0; } inode_dec_link_count(inode); iput(inode); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Boaz Harrosh57100.00%1100.00%
Total57100.00%1100.00%


static struct dentry *exofs_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags) { struct inode *inode; ino_t ino; if (dentry->d_name.len > EXOFS_NAME_LEN) return ERR_PTR(-ENAMETOOLONG); ino = exofs_inode_by_name(dir, dentry); inode = ino ? exofs_iget(dir->i_sb, ino) : NULL; return d_splice_alias(inode, dentry); }

Contributors

PersonTokensPropCommitsCommitProp
Boaz Harrosh7392.41%133.33%
Al Viro67.59%266.67%
Total79100.00%3100.00%


static int exofs_create(struct inode *dir, struct dentry *dentry, umode_t mode, bool excl) { struct inode *inode = exofs_new_inode(dir, mode); int err = PTR_ERR(inode); if (!IS_ERR(inode)) { inode->i_op = &exofs_file_inode_operations; inode->i_fop = &exofs_file_operations; inode->i_mapping->a_ops = &exofs_aops; mark_inode_dirty(inode); err = exofs_add_nondir(dentry, inode); } return err; }

Contributors

PersonTokensPropCommitsCommitProp
Boaz Harrosh8996.74%133.33%
Al Viro33.26%266.67%
Total92100.00%3100.00%


static int exofs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t rdev) { struct inode *inode; int err; inode = exofs_new_inode(dir, mode); err = PTR_ERR(inode); if (!IS_ERR(inode)) { init_special_inode(inode, inode->i_mode, rdev); mark_inode_dirty(inode); err = exofs_add_nondir(dentry, inode); } return err; }

Contributors

PersonTokensPropCommitsCommitProp
Boaz Harrosh8398.81%150.00%
Al Viro11.19%150.00%
Total84100.00%2100.00%


static int exofs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) { struct super_block *sb = dir->i_sb; int err = -ENAMETOOLONG; unsigned l = strlen(symname)+1; struct inode *inode; struct exofs_i_info *oi; if (l > sb->s_blocksize) goto out; inode = exofs_new_inode(dir, S_IFLNK | S_IRWXUGO); err = PTR_ERR(inode); if (IS_ERR(inode)) goto out; oi = exofs_i(inode); if (l > sizeof(oi->i_data)) { /* slow symlink */ inode->i_op = &page_symlink_inode_operations; inode_nohighmem(inode); inode->i_mapping->a_ops = &exofs_aops; memset(oi->i_data, 0, sizeof(oi->i_data)); err = page_symlink(inode, symname, l); if (err) goto out_fail; } else { /* fast symlink */ inode->i_op = &simple_symlink_inode_operations; inode->i_link = (char *)oi->i_data; memcpy(oi->i_data, symname, l); inode->i_size = l-1; } mark_inode_dirty(inode); err = exofs_add_nondir(dentry, inode); out: return err; out_fail: inode_dec_link_count(inode); iput(inode); goto out; }

Contributors

PersonTokensPropCommitsCommitProp
Boaz Harrosh22892.31%133.33%
Al Viro197.69%266.67%
Total247100.00%3100.00%


static int exofs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry) { struct inode *inode = d_inode(old_dentry); inode->i_ctime = current_time(inode); inode_inc_link_count(inode); ihold(inode); return exofs_add_nondir(dentry, inode); }

Contributors

PersonTokensPropCommitsCommitProp
Boaz Harrosh5086.21%125.00%
Deepa Dinamani46.90%125.00%
David Howells35.17%125.00%
Al Viro11.72%125.00%
Total58100.00%4100.00%


static int exofs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) { struct inode *inode; int err; inode_inc_link_count(dir); inode = exofs_new_inode(dir, S_IFDIR | mode); err = PTR_ERR(inode); if (IS_ERR(inode)) goto out_dir; inode->i_op = &exofs_dir_inode_operations; inode->i_fop = &exofs_dir_operations; inode->i_mapping->a_ops = &exofs_aops; inode_inc_link_count(inode); err = exofs_make_empty(inode, dir); if (err) goto out_fail; err = exofs_add_link(dentry, inode); if (err) goto out_fail; d_instantiate(dentry, inode); out: return err; out_fail: inode_dec_link_count(inode); inode_dec_link_count(inode); iput(inode); out_dir: inode_dec_link_count(dir); goto out; }

Contributors

PersonTokensPropCommitsCommitProp
Boaz Harrosh15899.37%150.00%
Al Viro10.63%150.00%
Total159100.00%2100.00%


static int exofs_unlink(struct inode *dir, struct dentry *dentry) { struct inode *inode = d_inode(dentry); struct exofs_dir_entry *de; struct page *page; int err = -ENOENT; de = exofs_find_entry(dir, dentry, &page); if (!de) goto out; err = exofs_delete_entry(de, page); if (err) goto out; inode->i_ctime = dir->i_ctime; inode_dec_link_count(inode); err = 0; out: return err; }

Contributors

PersonTokensPropCommitsCommitProp
Boaz Harrosh9797.00%150.00%
David Howells33.00%150.00%
Total100100.00%2100.00%


static int exofs_rmdir(struct inode *dir, struct dentry *dentry) { struct inode *inode = d_inode(dentry); int err = -ENOTEMPTY; if (exofs_empty_dir(inode)) { err = exofs_unlink(dir, dentry); if (!err) { inode->i_size = 0; inode_dec_link_count(inode); inode_dec_link_count(dir); } } return err; }

Contributors

PersonTokensPropCommitsCommitProp
Boaz Harrosh7396.05%150.00%
David Howells33.95%150.00%
Total76100.00%2100.00%


static int exofs_rename(struct inode *old_dir, struct dentry *old_dentry, struct inode *new_dir, struct dentry *new_dentry, unsigned int flags) { struct inode *old_inode = d_inode(old_dentry); struct inode *new_inode = d_inode(new_dentry); struct page *dir_page = NULL; struct exofs_dir_entry *dir_de = NULL; struct page *old_page; struct exofs_dir_entry *old_de; int err = -ENOENT; if (flags & ~RENAME_NOREPLACE) return -EINVAL; old_de = exofs_find_entry(old_dir, old_dentry, &old_page); if (!old_de) goto out; if (S_ISDIR(old_inode->i_mode)) { err = -EIO; dir_de = exofs_dotdot(old_inode, &dir_page); if (!dir_de) goto out_old; } if (new_inode) { struct page *new_page; struct exofs_dir_entry *new_de; err = -ENOTEMPTY; if (dir_de && !exofs_empty_dir(new_inode)) goto out_dir; err = -ENOENT; new_de = exofs_find_entry(new_dir, new_dentry, &new_page); if (!new_de) goto out_dir; err = exofs_set_link(new_dir, new_de, new_page, old_inode); new_inode->i_ctime = current_time(new_inode); if (dir_de) drop_nlink(new_inode); inode_dec_link_count(new_inode); if (err) goto out_dir; } else { err = exofs_add_link(new_dentry, old_inode); if (err) goto out_dir; if (dir_de) inode_inc_link_count(new_dir); } old_inode->i_ctime = current_time(old_inode); exofs_delete_entry(old_de, old_page); mark_inode_dirty(old_inode); if (dir_de) { err = exofs_set_link(old_inode, dir_de, dir_page, new_dir); inode_dec_link_count(old_dir); if (err) goto out_dir; } return 0; out_dir: if (dir_de) { kunmap(dir_page); put_page(dir_page); } out_old: kunmap(old_page); put_page(old_page); out: return err; }

Contributors

PersonTokensPropCommitsCommitProp
Boaz Harrosh33391.23%116.67%
Miklos Szeredi154.11%116.67%
Deepa Dinamani82.19%116.67%
David Howells61.64%116.67%
Kirill A. Shutemov20.55%116.67%
Al Viro10.27%116.67%
Total365100.00%6100.00%

const struct inode_operations exofs_dir_inode_operations = { .create = exofs_create, .lookup = exofs_lookup, .link = exofs_link, .unlink = exofs_unlink, .symlink = exofs_symlink, .mkdir = exofs_mkdir, .rmdir = exofs_rmdir, .mknod = exofs_mknod, .rename = exofs_rename, .setattr = exofs_setattr, }; const struct inode_operations exofs_special_inode_operations = { .setattr = exofs_setattr, };

Overall Contributors

PersonTokensPropCommitsCommitProp
Boaz Harrosh131494.53%212.50%
Al Viro322.30%1062.50%
Miklos Szeredi151.08%16.25%
David Howells151.08%16.25%
Deepa Dinamani120.86%16.25%
Kirill A. Shutemov20.14%16.25%
Total1390100.00%16100.00%
Directory: fs/exofs
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