0314acfb2d
Mostly removal of unused parameters from calls. Change-Id: I0eb7b568265d1669492d958e78b9e69d7cf6fc05
118 lines
2.6 KiB
C
118 lines
2.6 KiB
C
#include "inc.h"
|
|
|
|
static char getdents_buf[GETDENTS_BUFSIZ];
|
|
|
|
ssize_t fs_read(ino_t ino_nr, struct fsdriver_data *data, size_t bytes,
|
|
off_t pos, int __unused call)
|
|
{
|
|
size_t off, chunk, block_size, cum_io;
|
|
off_t f_size;
|
|
struct inode *i_node;
|
|
struct buf *bp;
|
|
int r;
|
|
|
|
/* Try to get inode according to its index. */
|
|
if ((i_node = find_inode(ino_nr)) == NULL)
|
|
return EINVAL; /* No inode found. */
|
|
|
|
f_size = i_node->i_stat.st_size;
|
|
if (pos >= f_size)
|
|
return 0; /* EOF */
|
|
|
|
/* Limit the request to the remainder of the file size. */
|
|
if ((off_t)bytes > f_size - pos)
|
|
bytes = (size_t)(f_size - pos);
|
|
|
|
block_size = v_pri.logical_block_size_l;
|
|
cum_io = 0;
|
|
|
|
lmfs_reset_rdwt_err();
|
|
r = OK;
|
|
|
|
/* Split the transfer into chunks that don't span two blocks. */
|
|
while (bytes > 0) {
|
|
off = pos % block_size;
|
|
|
|
chunk = block_size - off;
|
|
if (chunk > bytes)
|
|
chunk = bytes;
|
|
|
|
/* Read 'chunk' bytes. */
|
|
bp = read_extent_block(i_node->extent, pos / block_size);
|
|
if (bp == NULL)
|
|
panic("bp not valid in rw_chunk; this can't happen");
|
|
|
|
r = fsdriver_copyout(data, cum_io, b_data(bp)+off, chunk);
|
|
|
|
lmfs_put_block(bp);
|
|
|
|
if (r != OK)
|
|
break; /* EOF reached. */
|
|
if (lmfs_rdwt_err() < 0)
|
|
break;
|
|
|
|
/* Update counters and pointers. */
|
|
bytes -= chunk; /* Bytes yet to be read. */
|
|
cum_io += chunk; /* Bytes read so far. */
|
|
pos += chunk; /* Position within the file. */
|
|
}
|
|
|
|
if (lmfs_rdwt_err() != OK)
|
|
r = lmfs_rdwt_err(); /* Check for disk error. */
|
|
if (lmfs_rdwt_err() == END_OF_FILE)
|
|
r = OK;
|
|
|
|
return (r == OK) ? cum_io : r;
|
|
}
|
|
|
|
ssize_t fs_getdents(ino_t ino_nr, struct fsdriver_data *data, size_t bytes,
|
|
off_t *pos)
|
|
{
|
|
struct fsdriver_dentry fsdentry;
|
|
struct inode *i_node, *i_node_tmp;
|
|
size_t cur_pos, new_pos;
|
|
int r, len;
|
|
char *cp;
|
|
|
|
if ((i_node = find_inode(ino_nr)) == NULL)
|
|
return EINVAL;
|
|
|
|
if (*pos < 0 || *pos > SSIZE_MAX)
|
|
return EINVAL;
|
|
|
|
fsdriver_dentry_init(&fsdentry, data, bytes, getdents_buf,
|
|
sizeof(getdents_buf));
|
|
|
|
r = OK;
|
|
|
|
for (cur_pos = (size_t)*pos; ; cur_pos = new_pos) {
|
|
i_node_tmp = alloc_inode();
|
|
r = read_inode(i_node_tmp, i_node->extent, cur_pos, &new_pos);
|
|
if ((r != OK) || (new_pos >= i_node->i_stat.st_size)) {
|
|
put_inode(i_node_tmp);
|
|
break;
|
|
}
|
|
|
|
/* Compute the length of the name */
|
|
cp = memchr(i_node_tmp->i_name, '\0', NAME_MAX);
|
|
if (cp == NULL)
|
|
len = NAME_MAX;
|
|
else
|
|
len = cp - i_node_tmp->i_name;
|
|
|
|
r = fsdriver_dentry_add(&fsdentry, i_node_tmp->i_stat.st_ino,
|
|
i_node_tmp->i_name, len,
|
|
IFTODT(i_node_tmp->i_stat.st_mode));
|
|
|
|
put_inode(i_node_tmp);
|
|
|
|
if (r <= 0)
|
|
break;
|
|
}
|
|
|
|
if (r >= 0 && (r = fsdriver_dentry_finish(&fsdentry)) >= 0)
|
|
*pos = cur_pos;
|
|
|
|
return r;
|
|
}
|