Release 4.10 fs/reiserfs/dir.c
/*
* Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
*/
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include "reiserfs.h"
#include <linux/stat.h>
#include <linux/buffer_head.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
extern const struct reiserfs_key MIN_KEY;
static int reiserfs_readdir(struct file *, struct dir_context *);
static int reiserfs_dir_fsync(struct file *filp, loff_t start, loff_t end,
int datasync);
const struct file_operations reiserfs_dir_operations = {
.llseek = generic_file_llseek,
.read = generic_read_dir,
.iterate_shared = reiserfs_readdir,
.fsync = reiserfs_dir_fsync,
.unlocked_ioctl = reiserfs_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = reiserfs_compat_ioctl,
#endif
};
static int reiserfs_dir_fsync(struct file *filp, loff_t start, loff_t end,
int datasync)
{
struct inode *inode = filp->f_mapping->host;
int err;
err = filemap_write_and_wait_range(inode->i_mapping, start, end);
if (err)
return err;
inode_lock(inode);
reiserfs_write_lock(inode->i_sb);
err = reiserfs_commit_for_inode(inode);
reiserfs_write_unlock(inode->i_sb);
inode_unlock(inode);
if (err < 0)
return err;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| josef bacik | josef bacik | 34 | 35.05% | 1 | 11.11% |
| oleg drokin | oleg drokin | 22 | 22.68% | 1 | 11.11% |
| linus torvalds | linus torvalds | 20 | 20.62% | 3 | 33.33% |
| jeff mahoney | jeff mahoney | 14 | 14.43% | 1 | 11.11% |
| christoph hellwig | christoph hellwig | 4 | 4.12% | 1 | 11.11% |
| al viro | al viro | 2 | 2.06% | 1 | 11.11% |
| adrian bunk | adrian bunk | 1 | 1.03% | 1 | 11.11% |
| Total | 97 | 100.00% | 9 | 100.00% |
#define store_ih(where,what) copy_item_head (where, what)
static inline bool is_privroot_deh(struct inode *dir, struct reiserfs_de_head *deh)
{
struct dentry *privroot = REISERFS_SB(dir->i_sb)->priv_root;
return (d_really_is_positive(privroot) &&
deh->deh_objectid == INODE_PKEY(d_inode(privroot))->k_objectid);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| jeff mahoney | jeff mahoney | 45 | 84.91% | 2 | 50.00% |
| david howells | david howells | 6 | 11.32% | 1 | 25.00% |
| al viro | al viro | 2 | 3.77% | 1 | 25.00% |
| Total | 53 | 100.00% | 4 | 100.00% |
int reiserfs_readdir_inode(struct inode *inode, struct dir_context *ctx)
{
/* key of current position in the directory (key of directory entry) */
struct cpu_key pos_key;
INITIALIZE_PATH(path_to_entry);
struct buffer_head *bh;
int item_num, entry_num;
const struct reiserfs_key *rkey;
struct item_head *ih, tmp_ih;
int search_res;
char *local_buf;
loff_t next_pos;
char small_buf[32]; /* avoid kmalloc if we can */
struct reiserfs_dir_entry de;
int ret = 0;
int depth;
reiserfs_write_lock(inode->i_sb);
reiserfs_check_lock_depth(inode->i_sb, "readdir");
/*
* form key for search the next directory entry using
* f_pos field of file structure
*/
make_cpu_key(&pos_key, inode, ctx->pos ?: DOT_OFFSET, TYPE_DIRENTRY, 3);
next_pos = cpu_key_k_offset(&pos_key);
path_to_entry.reada = PATH_READA;
while (1) {
research:
/*
* search the directory item, containing entry with
* specified key
*/
search_res =
search_by_entry_key(inode->i_sb, &pos_key, &path_to_entry,
&de);
if (search_res == IO_ERROR) {
/*
* FIXME: we could just skip part of directory
* which could not be read
*/
ret = -EIO;
goto out;
}
entry_num = de.de_entry_num;
bh = de.de_bh;
item_num = de.de_item_num;
ih = de.de_ih;
store_ih(&tmp_ih, ih);
/* we must have found item, that is item of this directory, */
RFALSE(COMP_SHORT_KEYS(&ih->ih_key, &pos_key),
"vs-9000: found item %h does not match to dir we readdir %K",
ih, &pos_key);
RFALSE(item_num > B_NR_ITEMS(bh) - 1,
"vs-9005 item_num == %d, item amount == %d",
item_num, B_NR_ITEMS(bh));
/*
* and entry must be not more than number of entries
* in the item
*/
RFALSE(ih_entry_count(ih) < entry_num,
"vs-9010: entry number is too big %d (%d)",
entry_num, ih_entry_count(ih));
/*
* go through all entries in the directory item beginning
* from the entry, that has been found
*/
if (search_res == POSITION_FOUND
|| entry_num < ih_entry_count(ih)) {
struct reiserfs_de_head *deh =
B_I_DEH(bh, ih) + entry_num;
for (; entry_num < ih_entry_count(ih);
entry_num++, deh++) {
int d_reclen;
char *d_name;
ino_t d_ino;
loff_t cur_pos = deh_offset(deh);
/* it is hidden entry */
if (!de_visible(deh))
continue;
d_reclen = entry_length(bh, ih, entry_num);
d_name = B_I_DEH_ENTRY_FILE_NAME(bh, ih, deh);
if (d_reclen <= 0 ||
d_name + d_reclen > bh->b_data + bh->b_size) {
/*
* There is corrupted data in entry,
* We'd better stop here
*/
pathrelse(&path_to_entry);
ret = -EIO;
goto out;
}
if (!d_name[d_reclen - 1])
d_reclen = strlen(d_name);
/* too big to send back to VFS */
if (d_reclen >
REISERFS_MAX_NAME(inode->i_sb->
s_blocksize)) {
continue;
}
/* Ignore the .reiserfs_priv entry */
if (is_privroot_deh(inode, deh))
continue;
ctx->pos = deh_offset(deh);
d_ino = deh_objectid(deh);
if (d_reclen <= 32) {
local_buf = small_buf;
} else {
local_buf = kmalloc(d_reclen,
GFP_NOFS);
if (!local_buf) {
pathrelse(&path_to_entry);
ret = -ENOMEM;
goto out;
}
if (item_moved(&tmp_ih, &path_to_entry)) {
kfree(local_buf);
goto research;
}
}
/*
* Note, that we copy name to user space via
* temporary buffer (local_buf) because
* filldir will block if user space buffer is
* swapped out. At that time entry can move to
* somewhere else
*/
memcpy(local_buf, d_name, d_reclen);
/*
* Since filldir might sleep, we can release
* the write lock here for other waiters
*/
depth = reiserfs_write_unlock_nested(inode->i_sb);
if (!dir_emit
(ctx, local_buf, d_reclen, d_ino,
DT_UNKNOWN)) {
reiserfs_write_lock_nested(inode->i_sb, depth);
if (local_buf != small_buf) {
kfree(local_buf);
}
goto end;
}
reiserfs_write_lock_nested(inode->i_sb, depth);
if (local_buf != small_buf) {
kfree(local_buf);
}
/* deh_offset(deh) may be invalid now. */
next_pos = cur_pos + 1;
if (item_moved(&tmp_ih, &path_to_entry)) {
set_cpu_key_k_offset(&pos_key,
next_pos);
goto research;
}
} /* for */
}
/* end of directory has been reached */
if (item_num != B_NR_ITEMS(bh) - 1)
goto end;
/*
* item we went through is last item of node. Using right
* delimiting key check is it directory end
*/
rkey = get_rkey(&path_to_entry, inode->i_sb);
if (!comp_le_keys(rkey, &MIN_KEY)) {
/*
* set pos_key to key, that is the smallest and greater
* that key of the last entry in the item
*/
set_cpu_key_k_offset(&pos_key, next_pos);
continue;
}
/* end of directory has been reached */
if (COMP_SHORT_KEYS(rkey, &pos_key)) {
goto end;
}
/* directory continues in the right neighboring block */
set_cpu_key_k_offset(&pos_key,
le_key_k_offset(KEY_FORMAT_3_5, rkey));
} /* while */
end:
ctx->pos = next_pos;
pathrelse(&path_to_entry);
reiserfs_check_path(&path_to_entry);
out:
reiserfs_write_unlock(inode->i_sb);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| linus torvalds | linus torvalds | 575 | 75.96% | 8 | 27.59% |
| jeff mahoney | jeff mahoney | 53 | 7.00% | 7 | 24.14% |
| lepton wu | lepton wu | 34 | 4.49% | 1 | 3.45% |
| dave hansen | dave hansen | 22 | 2.91% | 1 | 3.45% |
| frederic weisbecker | frederic weisbecker | 19 | 2.51% | 1 | 3.45% |
| al viro | al viro | 17 | 2.25% | 3 | 10.34% |
| andrew morton | andrew morton | 13 | 1.72% | 3 | 10.34% |
| oleg drokin | oleg drokin | 13 | 1.72% | 2 | 6.90% |
| chris mason | chris mason | 6 | 0.79% | 1 | 3.45% |
| pekka j enberg | pekka j enberg | 4 | 0.53% | 1 | 3.45% |
| hans reiser | hans reiser | 1 | 0.13% | 1 | 3.45% |
| Total | 757 | 100.00% | 29 | 100.00% |
static int reiserfs_readdir(struct file *file, struct dir_context *ctx)
{
return reiserfs_readdir_inode(file_inode(file), ctx);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| jeff mahoney | jeff mahoney | 17 | 62.96% | 1 | 33.33% |
| al viro | al viro | 10 | 37.04% | 2 | 66.67% |
| Total | 27 | 100.00% | 3 | 100.00% |
/*
* compose directory item containing "." and ".." entries (entries are
* not aligned to 4 byte boundary)
*/
void make_empty_dir_item_v1(char *body, __le32 dirid, __le32 objid,
__le32 par_dirid, __le32 par_objid)
{
struct reiserfs_de_head *dot, *dotdot;
memset(body, 0, EMPTY_DIR_SIZE_V1);
dot = (struct reiserfs_de_head *)body;
dotdot = dot + 1;
/* direntry header of "." */
put_deh_offset(dot, DOT_OFFSET);
/* these two are from make_le_item_head, and are are LE */
dot->deh_dir_id = dirid;
dot->deh_objectid = objid;
dot->deh_state = 0; /* Endian safe if 0 */
put_deh_location(dot, EMPTY_DIR_SIZE_V1 - strlen("."));
mark_de_visible(dot);
/* direntry header of ".." */
put_deh_offset(dotdot, DOT_DOT_OFFSET);
/* key of ".." for the root directory */
/* these two are from the inode, and are are LE */
dotdot->deh_dir_id = par_dirid;
dotdot->deh_objectid = par_objid;
dotdot->deh_state = 0; /* Endian safe if 0 */
put_deh_location(dotdot, deh_location(dot) - strlen(".."));
mark_de_visible(dotdot);
/* copy ".." and "." */
memcpy(body + deh_location(dot), ".", 1);
memcpy(body + deh_location(dotdot), "..", 2);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| linus torvalds | linus torvalds | 140 | 79.55% | 1 | 33.33% |
| jeff mahoney | jeff mahoney | 32 | 18.18% | 1 | 33.33% |
| al viro | al viro | 4 | 2.27% | 1 | 33.33% |
| Total | 176 | 100.00% | 3 | 100.00% |
/* compose directory item containing "." and ".." entries */
void make_empty_dir_item(char *body, __le32 dirid, __le32 objid,
__le32 par_dirid, __le32 par_objid)
{
struct reiserfs_de_head *dot, *dotdot;
memset(body, 0, EMPTY_DIR_SIZE);
dot = (struct reiserfs_de_head *)body;
dotdot = dot + 1;
/* direntry header of "." */
put_deh_offset(dot, DOT_OFFSET);
/* these two are from make_le_item_head, and are are LE */
dot->deh_dir_id = dirid;
dot->deh_objectid = objid;
dot->deh_state = 0; /* Endian safe if 0 */
put_deh_location(dot, EMPTY_DIR_SIZE - ROUND_UP(strlen(".")));
mark_de_visible(dot);
/* direntry header of ".." */
put_deh_offset(dotdot, DOT_DOT_OFFSET);
/* key of ".." for the root directory */
/* these two are from the inode, and are are LE */
dotdot->deh_dir_id = par_dirid;
dotdot->deh_objectid = par_objid;
dotdot->deh_state = 0; /* Endian safe if 0 */
put_deh_location(dotdot, deh_location(dot) - ROUND_UP(strlen("..")));
mark_de_visible(dotdot);
/* copy ".." and "." */
memcpy(body + deh_location(dot), ".", 1);
memcpy(body + deh_location(dotdot), "..", 2);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| linus torvalds | linus torvalds | 146 | 80.22% | 1 | 33.33% |
| jeff mahoney | jeff mahoney | 32 | 17.58% | 1 | 33.33% |
| al viro | al viro | 4 | 2.20% | 1 | 33.33% |
| Total | 182 | 100.00% | 3 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| linus torvalds | linus torvalds | 948 | 67.28% | 10 | 19.23% |
| jeff mahoney | jeff mahoney | 194 | 13.77% | 10 | 19.23% |
| al viro | al viro | 43 | 3.05% | 7 | 13.46% |
| oleg drokin | oleg drokin | 41 | 2.91% | 3 | 5.77% |
| josef bacik | josef bacik | 40 | 2.84% | 1 | 1.92% |
| lepton wu | lepton wu | 34 | 2.41% | 1 | 1.92% |
| dave hansen | dave hansen | 22 | 1.56% | 1 | 1.92% |
| frederic weisbecker | frederic weisbecker | 20 | 1.42% | 2 | 3.85% |
| david howells | david howells | 18 | 1.28% | 2 | 3.85% |
| andrew morton | andrew morton | 18 | 1.28% | 4 | 7.69% |
| christoph hellwig | christoph hellwig | 7 | 0.50% | 2 | 3.85% |
| chris mason | chris mason | 6 | 0.43% | 1 | 1.92% |
| jan blunck | jan blunck | 5 | 0.35% | 1 | 1.92% |
| pekka j enberg | pekka j enberg | 4 | 0.28% | 1 | 1.92% |
| tejun heo | tejun heo | 3 | 0.21% | 1 | 1.92% |
| adrian bunk | adrian bunk | 2 | 0.14% | 1 | 1.92% |
| hans reiser | hans reiser | 1 | 0.07% | 1 | 1.92% |
| david woodhouse | david woodhouse | 1 | 0.07% | 1 | 1.92% |
| fabian frederick | fabian frederick | 1 | 0.07% | 1 | 1.92% |
| arjan van de ven | arjan van de ven | 1 | 0.07% | 1 | 1.92% |
| Total | 1409 | 100.00% | 52 | 100.00% |
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