minix/servers/ext2/stadir.c

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/* Created (MFS based):
* February 2010 (Evgeniy Ivanov)
*/
#include "fs.h"
#include <string.h>
#include <sys/stat.h>
#include <sys/statfs.h>
#include <sys/statvfs.h>
#include "inode.h"
#include "super.h"
#include <minix/vfsif.h>
/*===========================================================================*
* stat_inode *
*===========================================================================*/
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static int stat_inode(
register struct inode *rip, /* pointer to inode to stat */
endpoint_t who_e, /* Caller endpoint */
cp_grant_id_t gid /* grant for the stat buf */
)
{
/* Common code for stat and fstat system calls. */
struct stat statbuf;
mode_t mo;
int r, s;
/* Update the atime, ctime, and mtime fields in the inode, if need be. */
if (rip->i_update) update_times(rip);
/* Fill in the statbuf struct. */
mo = rip->i_mode & I_TYPE;
/* true iff special */
s = (mo == I_CHAR_SPECIAL || mo == I_BLOCK_SPECIAL);
memset(&statbuf, 0, sizeof(struct stat));
statbuf.st_dev = rip->i_dev;
statbuf.st_ino = rip->i_num;
statbuf.st_mode = rip->i_mode;
statbuf.st_nlink = rip->i_links_count;
statbuf.st_uid = rip->i_uid;
statbuf.st_gid = rip->i_gid;
statbuf.st_rdev = (s ? rip->i_block[0] : NO_DEV);
statbuf.st_size = rip->i_size;
statbuf.st_atime = rip->i_atime;
statbuf.st_mtime = rip->i_mtime;
statbuf.st_ctime = rip->i_ctime;
statbuf.st_blksize = rip->i_sp->s_block_size;
statbuf.st_blocks = rip->i_blocks;
/* Copy the struct to user space. */
r = sys_safecopyto(who_e, gid, (vir_bytes) 0, (vir_bytes) &statbuf,
(size_t) sizeof(statbuf));
return(r);
}
/*===========================================================================*
* fs_fstatfs *
*===========================================================================*/
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int fs_fstatfs()
{
struct statfs st;
struct inode *rip;
int r;
if((rip = find_inode(fs_dev, ROOT_INODE)) == NULL)
return(EINVAL);
st.f_bsize = rip->i_sp->s_block_size;
/* Copy the struct to user space. */
r = sys_safecopyto(fs_m_in.m_source, (cp_grant_id_t) fs_m_in.REQ_GRANT,
(vir_bytes) 0, (vir_bytes) &st, (size_t) sizeof(st));
return(r);
}
/*===========================================================================*
* fs_stat *
*===========================================================================*/
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int fs_stat()
{
register int r; /* return value */
register struct inode *rip; /* target inode */
if ((rip = get_inode(fs_dev, (ino_t) fs_m_in.REQ_INODE_NR)) == NULL)
return(EINVAL);
r = stat_inode(rip, fs_m_in.m_source, (cp_grant_id_t) fs_m_in.REQ_GRANT);
put_inode(rip); /* release the inode */
return(r);
}
/*===========================================================================*
* fs_statvfs *
*===========================================================================*/
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int fs_statvfs()
{
struct statvfs st;
struct super_block *sp;
int r;
sp = get_super(fs_dev);
st.f_bsize = sp->s_block_size;
st.f_frsize = sp->s_block_size;
st.f_blocks = sp->s_blocks_count;
st.f_bfree = sp->s_free_blocks_count;
st.f_bavail = sp->s_free_blocks_count - sp->s_r_blocks_count;
st.f_files = sp->s_inodes_count;
st.f_ffree = sp->s_free_inodes_count;
st.f_favail = sp->s_free_inodes_count;
st.f_fsid = fs_dev;
st.f_flag = (sp->s_rd_only == 1 ? ST_RDONLY : 0);
st.f_flag |= ST_NOTRUNC;
st.f_namemax = NAME_MAX;
/* Copy the struct to user space. */
r = sys_safecopyto(fs_m_in.m_source, fs_m_in.REQ_GRANT, 0, (vir_bytes) &st,
(phys_bytes) sizeof(st));
return(r);
}
/*===========================================================================*
* blockstats *
*===========================================================================*/
void fs_blockstats(u32_t *blocks, u32_t *free, u32_t *used)
{
struct super_block *sp = get_super(fs_dev);
*blocks = sp->s_blocks_count;
*free = sp->s_free_blocks_count;
*used = *blocks - *free;
}