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Support NFS cookies in VOP_READDIR, allowing ext2fs filesystems to be

Browse Source 
exported via NFS.

2.2 candidate.
This commit is contained in:
dfr 1997-04-05 12:23:44 +00:00
parent b8a7416e69
commit f5e07dc7a9
2 changed files with 52 additions and 0 deletions
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26
sys/gnu/ext2fs/ext2_lookup.c
View File

@ -156,6 +156,7 @@ ext2_readdir(ap)
int count, error;
struct ext2_dir_entry *edp, *dp;
int ncookies;
struct dirent dstdp;
struct uio auio;
struct iovec aiov;
@ -183,6 +184,7 @@ printf("ext2_readdir called uio->uio_offset %d uio->uio_resid %d count %d \n",
if (error == 0) {
readcnt = count - auio.uio_resid;
edp = (struct ext2_dir_entry *)&dirbuf[readcnt];
ncookies = 0;
for (dp = (struct ext2_dir_entry *)dirbuf;
!error && uio->uio_resid > 0 && dp < edp; ) {
ext2_dirconv2ffs(dp, &dstdp);
@ -194,6 +196,8 @@ printf("ext2_readdir called uio->uio_offset %d uio->uio_resid %d count %d \n",
error =
uiomove((caddr_t)&dstdp,
dstdp.d_reclen, uio);
if (!error)
ncookies++;
} else
break;
} else {
@ -203,8 +207,30 @@ printf("ext2_readdir called uio->uio_offset %d uio->uio_resid %d count %d \n",
}
/* we need to correct uio_offset */
uio->uio_offset = startoffset + (caddr_t)dp - dirbuf;
if (!error && ap->a_ncookies != NULL) {
u_long *cookies;
u_long *cookiep;
off_t off;
if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1)
panic("ext2fs_readdir: unexpected uio from NFS server");
MALLOC(cookies, u_long *, ncookies * sizeof(u_long), M_TEMP,
M_WAITOK);
off = startoffset;
for (dp = (struct ext2_dir_entry *)dirbuf, cookiep = cookies;
dp < edp;
dp = (struct ext2_dir_entry *)((caddr_t) dp + dp->rec_len)) {
off += dp->rec_len;
*cookiep++ = (u_long) off;
}
*ap->a_ncookies = ncookies;
*ap->a_cookies = cookies;
}
}
FREE(dirbuf, M_TEMP);
if (ap->a_eofflag)
*ap->a_eofflag = VTOI(ap->a_vp)->i_size <= uio->uio_offset;
return (error);
}

26
sys/gnu/fs/ext2fs/ext2_lookup.c
View File

@ -156,6 +156,7 @@ ext2_readdir(ap)
int count, error;
struct ext2_dir_entry *edp, *dp;
int ncookies;
struct dirent dstdp;
struct uio auio;
struct iovec aiov;
@ -183,6 +184,7 @@ printf("ext2_readdir called uio->uio_offset %d uio->uio_resid %d count %d \n",
if (error == 0) {
readcnt = count - auio.uio_resid;
edp = (struct ext2_dir_entry *)&dirbuf[readcnt];
ncookies = 0;
for (dp = (struct ext2_dir_entry *)dirbuf;
!error && uio->uio_resid > 0 && dp < edp; ) {
ext2_dirconv2ffs(dp, &dstdp);
@ -194,6 +196,8 @@ printf("ext2_readdir called uio->uio_offset %d uio->uio_resid %d count %d \n",
error =
uiomove((caddr_t)&dstdp,
dstdp.d_reclen, uio);
if (!error)
ncookies++;
} else
break;
} else {
@ -203,8 +207,30 @@ printf("ext2_readdir called uio->uio_offset %d uio->uio_resid %d count %d \n",
}
/* we need to correct uio_offset */
uio->uio_offset = startoffset + (caddr_t)dp - dirbuf;
if (!error && ap->a_ncookies != NULL) {
u_long *cookies;
u_long *cookiep;
off_t off;
if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1)
panic("ext2fs_readdir: unexpected uio from NFS server");
MALLOC(cookies, u_long *, ncookies * sizeof(u_long), M_TEMP,
M_WAITOK);
off = startoffset;
for (dp = (struct ext2_dir_entry *)dirbuf, cookiep = cookies;
dp < edp;
dp = (struct ext2_dir_entry *)((caddr_t) dp + dp->rec_len)) {
off += dp->rec_len;
*cookiep++ = (u_long) off;
}
*ap->a_ncookies = ncookies;
*ap->a_cookies = cookies;
}
}
FREE(dirbuf, M_TEMP);
if (ap->a_eofflag)
*ap->a_eofflag = VTOI(ap->a_vp)->i_size <= uio->uio_offset;
return (error);
}