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FFS: truncate write if it would exceed the fs max file size or RLIMIT_FSIZE

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PR:	164793
Reviewed by:	asomers, jah, markj
Tested by:	pho
Sponsored by:	The FreeBSD Foundation
MFC after:	2 weeks
Differential revision:	https://reviews.freebsd.org/D36625
This commit is contained in:
Konstantin Belousov 2022-09-18 14:48:40 +03:00
parent 1b4b75171e
commit 87525ef940
1 changed files with 8 additions and 5 deletions
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13
sys/ufs/ffs/ffs_vnops.c
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@ -839,7 +839,7 @@ ffs_write(
struct buf *bp;
ufs_lbn_t lbn;
off_t osize;
ssize_t resid;
ssize_t resid, r;
int seqcount;
int blkoffset, error, flags, ioflag, size, xfersize;
@ -888,15 +888,17 @@ ffs_write(
KASSERT(uio->uio_resid >= 0, ("ffs_write: uio->uio_resid < 0"));
KASSERT(uio->uio_offset >= 0, ("ffs_write: uio->uio_offset < 0"));
fs = ITOFS(ip);
if ((uoff_t)uio->uio_offset + uio->uio_resid > fs->fs_maxfilesize)
return (EFBIG);
/*
* Maybe this should be above the vnode op call, but so long as
* file servers have no limits, I don't think it matters.
*/
error = vn_rlimit_fsize(vp, uio, uio->uio_td);
if (error != 0)
error = vn_rlimit_fsizex(vp, uio, fs->fs_maxfilesize, &r,
uio->uio_td);
if (error != 0) {
vn_rlimit_fsizex_res(uio, r);
return (error);
}
resid = uio->uio_resid;
osize = ip->i_size;
@ -1037,6 +1039,7 @@ ffs_write(
if (ffs_fsfail_cleanup(VFSTOUFS(vp->v_mount), error))
error = ENXIO;
}
vn_rlimit_fsizex_res(uio, r);
return (error);
}