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tmpfs: 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 16:27:28 +03:00
parent a9c439ba10
commit 8bdb2695d6
1 changed files with 7 additions and 5 deletions
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12
sys/fs/tmpfs/tmpfs_vnops.c
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@ -639,6 +639,7 @@ tmpfs_write(struct vop_write_args *v)
struct uio *uio;
struct tmpfs_node *node;
off_t oldsize;
ssize_t r;
int error, ioflag;
mode_t newmode;
@ -655,12 +656,12 @@ tmpfs_write(struct vop_write_args *v)
return (0);
if (ioflag & IO_APPEND)
uio->uio_offset = node->tn_size;
if (uio->uio_offset + uio->uio_resid >
VFS_TO_TMPFS(vp->v_mount)->tm_maxfilesize)
return (EFBIG);
error = vn_rlimit_fsize(vp, uio, uio->uio_td);
if (error != 0)
error = vn_rlimit_fsizex(vp, uio, VFS_TO_TMPFS(vp->v_mount)->
tm_maxfilesize, &r, uio->uio_td);
if (error != 0) {
vn_rlimit_fsizex_res(uio, r);
return (error);
}
if (uio->uio_offset + uio->uio_resid > node->tn_size) {
error = tmpfs_reg_resize(vp, uio->uio_offset + uio->uio_resid,
@ -687,6 +688,7 @@ tmpfs_write(struct vop_write_args *v)
MPASS(IMPLIES(error == 0, uio->uio_resid == 0));
MPASS(IMPLIES(error != 0, oldsize == node->tn_size));
vn_rlimit_fsizex_res(uio, r);
return (error);
}