#include <linux/stat.h>
#include <linux/buffer_head.h>
#include <linux/slab.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
extern const struct reiserfs_key MIN_KEY;
-static int reiserfs_readdir(struct file *, void *, filldir_t);
+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,
- .readdir = reiserfs_readdir,
+ .iterate = reiserfs_readdir,
.fsync = reiserfs_dir_fsync,
.unlocked_ioctl = reiserfs_ioctl,
#ifdef CONFIG_COMPAT
#define store_ih(where,what) copy_item_head (where, what)
-static inline bool is_privroot_deh(struct dentry *dir,
- struct reiserfs_de_head *deh)
+static inline bool is_privroot_deh(struct inode *dir, struct reiserfs_de_head *deh)
{
- struct dentry *privroot = REISERFS_SB(dir->d_sb)->priv_root;
- return (dir == dir->d_parent && privroot->d_inode &&
- deh->deh_objectid == INODE_PKEY(privroot->d_inode)->k_objectid);
+ 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);
}
-int reiserfs_readdir_dentry(struct dentry *dentry, void *dirent,
- filldir_t filldir, loff_t *pos)
+int reiserfs_readdir_inode(struct inode *inode, struct dir_context *ctx)
{
- struct inode *inode = dentry->d_inode;
- struct cpu_key pos_key; /* key of current position in the directory (key of directory entry) */
+
+ /* 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;
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, *pos ?: DOT_OFFSET, TYPE_DIRENTRY, 3);
+ /*
+ * 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 */
+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
+ /*
+ * FIXME: we could just skip part of directory
+ * which could not be read
+ */
ret = -EIO;
goto out;
}
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),
+ 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(I_ENTRY_COUNT(ih) < entry_num,
+ /*
+ * 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, I_ENTRY_COUNT(ih));
+ 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 < I_ENTRY_COUNT(ih)) {
- /* go through all entries in the directory item beginning from the entry, that has been found */
+ || entry_num < ih_entry_count(ih)) {
struct reiserfs_de_head *deh =
B_I_DEH(bh, ih) + entry_num;
- for (; entry_num < I_ENTRY_COUNT(ih);
+ for (; entry_num < ih_entry_count(ih);
entry_num++, deh++) {
int d_reclen;
char *d_name;
- off_t d_off;
ino_t d_ino;
+ loff_t cur_pos = deh_offset(deh);
+ /* it is hidden entry */
if (!de_visible(deh))
- /* it is hidden entry */
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 */
+ /*
+ * 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)) {
- /* too big to send back to VFS */
continue;
}
/* Ignore the .reiserfs_priv entry */
- if (is_privroot_deh(dentry, deh))
+ if (is_privroot_deh(inode, deh))
continue;
- d_off = deh_offset(deh);
- *pos = d_off;
+ ctx->pos = deh_offset(deh);
d_ino = deh_objectid(deh);
if (d_reclen <= 32) {
local_buf = small_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
+
+ /*
+ * 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
*/
- reiserfs_write_unlock(inode->i_sb);
- if (filldir
- (dirent, local_buf, d_reclen, d_off, d_ino,
- DT_UNKNOWN) < 0) {
- reiserfs_write_lock(inode->i_sb);
+ 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(inode->i_sb);
+ reiserfs_write_lock_nested(inode->i_sb, depth);
if (local_buf != small_buf) {
kfree(local_buf);
}
- // next entry should be looked for with such offset
- next_pos = deh_offset(deh) + 1;
+
+ /* 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,
} /* for */
}
+ /* end of directory has been reached */
if (item_num != B_NR_ITEMS(bh) - 1)
- // end of directory has been reached
goto end;
- /* item we went through is last item of node. Using right
- delimiting key check is it directory 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 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)) {
- // end of directory has been reached
goto end;
}
} /* while */
end:
- *pos = next_pos;
+ ctx->pos = next_pos;
pathrelse(&path_to_entry);
reiserfs_check_path(&path_to_entry);
out:
return ret;
}
-static int reiserfs_readdir(struct file *file, void *dirent, filldir_t filldir)
+static int reiserfs_readdir(struct file *file, struct dir_context *ctx)
{
- struct dentry *dentry = file->f_path.dentry;
- return reiserfs_readdir_dentry(dentry, dirent, filldir, &file->f_pos);
+ return reiserfs_readdir_inode(file_inode(file), ctx);
}
-/* compose directory item containing "." and ".." entries (entries are
- not aligned to 4 byte boundary) */
-/* the last four params are LE */
+/*
+ * 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 *deh;
+ struct reiserfs_de_head *dot, *dotdot;
memset(body, 0, EMPTY_DIR_SIZE_V1);
- deh = (struct reiserfs_de_head *)body;
+ dot = (struct reiserfs_de_head *)body;
+ dotdot = dot + 1;
/* direntry header of "." */
- put_deh_offset(&(deh[0]), DOT_OFFSET);
+ put_deh_offset(dot, DOT_OFFSET);
/* these two are from make_le_item_head, and are are LE */
- deh[0].deh_dir_id = dirid;
- deh[0].deh_objectid = objid;
- deh[0].deh_state = 0; /* Endian safe if 0 */
- put_deh_location(&(deh[0]), EMPTY_DIR_SIZE_V1 - strlen("."));
- mark_de_visible(&(deh[0]));
+ 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(&(deh[1]), DOT_DOT_OFFSET);
+ put_deh_offset(dotdot, DOT_DOT_OFFSET);
/* key of ".." for the root directory */
/* these two are from the inode, and are are LE */
- deh[1].deh_dir_id = par_dirid;
- deh[1].deh_objectid = par_objid;
- deh[1].deh_state = 0; /* Endian safe if 0 */
- put_deh_location(&(deh[1]), deh_location(&(deh[0])) - strlen(".."));
- mark_de_visible(&(deh[1]));
+ 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(&(deh[0])), ".", 1);
- memcpy(body + deh_location(&(deh[1])), "..", 2);
+ memcpy(body + deh_location(dot), ".", 1);
+ memcpy(body + deh_location(dotdot), "..", 2);
}
/* 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 *deh;
+ struct reiserfs_de_head *dot, *dotdot;
memset(body, 0, EMPTY_DIR_SIZE);
- deh = (struct reiserfs_de_head *)body;
+ dot = (struct reiserfs_de_head *)body;
+ dotdot = dot + 1;
/* direntry header of "." */
- put_deh_offset(&(deh[0]), DOT_OFFSET);
+ put_deh_offset(dot, DOT_OFFSET);
/* these two are from make_le_item_head, and are are LE */
- deh[0].deh_dir_id = dirid;
- deh[0].deh_objectid = objid;
- deh[0].deh_state = 0; /* Endian safe if 0 */
- put_deh_location(&(deh[0]), EMPTY_DIR_SIZE - ROUND_UP(strlen(".")));
- mark_de_visible(&(deh[0]));
+ 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(&(deh[1]), DOT_DOT_OFFSET);
+ put_deh_offset(dotdot, DOT_DOT_OFFSET);
/* key of ".." for the root directory */
/* these two are from the inode, and are are LE */
- deh[1].deh_dir_id = par_dirid;
- deh[1].deh_objectid = par_objid;
- deh[1].deh_state = 0; /* Endian safe if 0 */
- put_deh_location(&(deh[1]),
- deh_location(&(deh[0])) - ROUND_UP(strlen("..")));
- mark_de_visible(&(deh[1]));
+ 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(&(deh[0])), ".", 1);
- memcpy(body + deh_location(&(deh[1])), "..", 2);
+ memcpy(body + deh_location(dot), ".", 1);
+ memcpy(body + deh_location(dotdot), "..", 2);
}
projects / firefly-linux-kernel-4.4.55.git / blobdiff