122 lines
3.5 KiB
C
122 lines
3.5 KiB
C
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/* Created (MFS based):
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* February 2010 (Evgeniy Ivanov)
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*/
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#include "fs.h"
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#include <string.h>
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#include <sys/stat.h>
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#include <sys/statvfs.h>
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#include "inode.h"
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#include "super.h"
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#include <minix/vfsif.h>
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/*===========================================================================*
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* stat_inode *
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*===========================================================================*/
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static int stat_inode(
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register struct inode *rip, /* pointer to inode to stat */
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endpoint_t who_e, /* Caller endpoint */
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cp_grant_id_t gid /* grant for the stat buf */
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)
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{
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/* Common code for stat and fstat system calls. */
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struct stat statbuf;
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mode_t mo;
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int r, s;
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/* Update the atime, ctime, and mtime fields in the inode, if need be. */
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if (rip->i_update) update_times(rip);
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/* Fill in the statbuf struct. */
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mo = rip->i_mode & I_TYPE;
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/* true iff special */
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s = (mo == I_CHAR_SPECIAL || mo == I_BLOCK_SPECIAL);
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memset(&statbuf, 0, sizeof(struct stat));
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statbuf.st_dev = rip->i_dev;
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statbuf.st_ino = rip->i_num;
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statbuf.st_mode = rip->i_mode;
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statbuf.st_nlink = rip->i_links_count;
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statbuf.st_uid = rip->i_uid;
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statbuf.st_gid = rip->i_gid;
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statbuf.st_rdev = (s ? (dev_t)rip->i_block[0] : NO_DEV);
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statbuf.st_size = rip->i_size;
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statbuf.st_atime = rip->i_atime;
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statbuf.st_mtime = rip->i_mtime;
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statbuf.st_ctime = rip->i_ctime;
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statbuf.st_blksize = rip->i_sp->s_block_size;
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statbuf.st_blocks = rip->i_blocks;
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/* Copy the struct to user space. */
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r = sys_safecopyto(who_e, gid, (vir_bytes) 0, (vir_bytes) &statbuf,
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(size_t) sizeof(statbuf));
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return(r);
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}
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/*===========================================================================*
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* fs_stat *
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*===========================================================================*/
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int fs_stat()
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{
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register int r; /* return value */
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register struct inode *rip; /* target inode */
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if ((rip = get_inode(fs_dev, fs_m_in.m_vfs_fs_stat.inode)) == NULL)
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return(EINVAL);
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r = stat_inode(rip, fs_m_in.m_source, fs_m_in.m_vfs_fs_stat.grant);
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put_inode(rip); /* release the inode */
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return(r);
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}
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/*===========================================================================*
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* fs_statvfs *
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*===========================================================================*/
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int fs_statvfs()
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{
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struct statvfs st;
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struct super_block *sp;
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int r;
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memset(&st, 0, sizeof(st));
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sp = get_super(fs_dev);
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st.f_flag = ST_NOTRUNC;
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st.f_bsize = sp->s_block_size;
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st.f_frsize = sp->s_block_size;
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st.f_iosize = sp->s_block_size;
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st.f_blocks = sp->s_blocks_count;
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st.f_bfree = sp->s_free_blocks_count;
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st.f_bavail = sp->s_free_blocks_count - sp->s_r_blocks_count;
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st.f_files = sp->s_inodes_count;
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st.f_ffree = sp->s_free_inodes_count;
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st.f_favail = sp->s_free_inodes_count;
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st.f_namemax = NAME_MAX;
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/* Copy the struct to user space. */
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r = sys_safecopyto(fs_m_in.m_source, fs_m_in.m_vfs_fs_statvfs.grant, 0,
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(vir_bytes) &st, (phys_bytes) sizeof(st));
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return(r);
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}
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/*===========================================================================*
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* blockstats *
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*===========================================================================*/
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void fs_blockstats(u64_t *blocks, u64_t *free, u64_t *used)
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{
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struct super_block *sp = get_super(fs_dev);
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*blocks = sp->s_blocks_count;
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*free = sp->s_free_blocks_count;
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*used = *blocks - *free;
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}
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