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author | jh <jh@FreeBSD.org> | 2010-01-29 12:09:14 +0000 |
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committer | jh <jh@FreeBSD.org> | 2010-01-29 12:09:14 +0000 |
commit | cf482307807918efe12edbfee94740f0069fc33b (patch) | |
tree | d8a53985962bf414ab0d94bf298c03d965014b62 /sys/fs | |
parent | f403000d3914d84750322e39d1292d2420d88026 (diff) | |
download | FreeBSD-src-cf482307807918efe12edbfee94740f0069fc33b.zip FreeBSD-src-cf482307807918efe12edbfee94740f0069fc33b.tar.gz |
Add "maxfilesize" mount option for tmpfs to allow specifying the
maximum file size limit. Default is UINT64_MAX when the option is
not specified. It was useless to set the limit to the total amount of
memory and swap in the system.
Use tmpfs_mem_info() rather than get_swpgtotal() in tmpfs_mount() to
check if there is enough memory available.
Remove now unused get_swpgtotal().
Reviewed by: Gleb Kurtsou
Approved by: trasz (mentor)
Diffstat (limited to 'sys/fs')
-rw-r--r-- | sys/fs/tmpfs/tmpfs_vfsops.c | 65 |
1 files changed, 8 insertions, 57 deletions
diff --git a/sys/fs/tmpfs/tmpfs_vfsops.c b/sys/fs/tmpfs/tmpfs_vfsops.c index 7d60849..356be5e 100644 --- a/sys/fs/tmpfs/tmpfs_vfsops.c +++ b/sys/fs/tmpfs/tmpfs_vfsops.c @@ -77,62 +77,12 @@ static int tmpfs_statfs(struct mount *, struct statfs *); /* --------------------------------------------------------------------- */ static const char *tmpfs_opts[] = { - "from", "size", "inodes", "uid", "gid", "mode", "export", + "from", "size", "maxfilesize", "inodes", "uid", "gid", "mode", "export", NULL }; /* --------------------------------------------------------------------- */ -#define SWI_MAXMIB 3 - -static u_int -get_swpgtotal(void) -{ - struct xswdev xsd; - char *sname = "vm.swap_info"; - int soid[SWI_MAXMIB], oid[2]; - u_int unswdev, total, dmmax, nswapdev; - size_t mibi, len; - - total = 0; - - len = sizeof(dmmax); - if (kernel_sysctlbyname(curthread, "vm.dmmax", &dmmax, &len, - NULL, 0, NULL, 0) != 0) - return total; - - len = sizeof(nswapdev); - if (kernel_sysctlbyname(curthread, "vm.nswapdev", - &nswapdev, &len, - NULL, 0, NULL, 0) != 0) - return total; - - mibi = (SWI_MAXMIB - 1) * sizeof(int); - oid[0] = 0; - oid[1] = 3; - - if (kernel_sysctl(curthread, oid, 2, - soid, &mibi, (void *)sname, strlen(sname), - NULL, 0) != 0) - return total; - - mibi = (SWI_MAXMIB - 1); - for (unswdev = 0; unswdev < nswapdev; ++unswdev) { - soid[mibi] = unswdev; - len = sizeof(struct xswdev); - if (kernel_sysctl(curthread, - soid, mibi + 1, &xsd, &len, NULL, 0, - NULL, 0) != 0) - return total; - if (len == sizeof(struct xswdev)) - total += (xsd.xsw_nblks - dmmax); - } - - /* Not Reached */ - return total; -} - -/* --------------------------------------------------------------------- */ static int tmpfs_node_ctor(void *mem, int size, void *arg, int flags) { @@ -181,12 +131,12 @@ tmpfs_mount(struct mount *mp) { struct tmpfs_mount *tmp; struct tmpfs_node *root; - size_t pages, mem_size; + size_t pages; uint32_t nodes; int error; /* Size counters. */ u_int nodes_max; - u_quad_t size_max; + u_quad_t size_max, maxfilesize; /* Root node attributes. */ uid_t root_uid; @@ -227,12 +177,13 @@ tmpfs_mount(struct mount *mp) nodes_max = 0; if (vfs_scanopt(mp->mnt_optnew, "size", "%qu", &size_max) != 1) size_max = 0; + if (vfs_scanopt(mp->mnt_optnew, "maxfilesize", "%qu", + &maxfilesize) != 1) + maxfilesize = 0; /* Do not allow mounts if we do not have enough memory to preserve * the minimum reserved pages. */ - mem_size = cnt.v_free_count + cnt.v_inactive_count + get_swpgtotal(); - mem_size -= mem_size > cnt.v_wire_count ? cnt.v_wire_count : mem_size; - if (mem_size < TMPFS_PAGES_RESERVED) + if (tmpfs_mem_info() < TMPFS_PAGES_RESERVED) return ENOSPC; /* Get the maximum number of memory pages this file system is @@ -261,7 +212,7 @@ tmpfs_mount(struct mount *mp) mtx_init(&tmp->allnode_lock, "tmpfs allnode lock", NULL, MTX_DEF); tmp->tm_nodes_max = nodes; tmp->tm_nodes_inuse = 0; - tmp->tm_maxfilesize = (u_int64_t)(cnt.v_page_count + get_swpgtotal()) * PAGE_SIZE; + tmp->tm_maxfilesize = maxfilesize > 0 ? maxfilesize : UINT64_MAX; LIST_INIT(&tmp->tm_nodes_used); tmp->tm_pages_max = pages; |