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Differential D6208 Diff 18498 head/sys/geom/label/g_label_ufs.c

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head/sys/geom/label/g_label_ufs.c

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#include <geom/label/g_label.h> #include <geom/label/g_label.h>
#define G_LABEL_UFS_VOLUME_DIR "ufs" #define G_LABEL_UFS_VOLUME_DIR "ufs"
#define G_LABEL_UFS_ID_DIR "ufsid" #define G_LABEL_UFS_ID_DIR "ufsid"
#define G_LABEL_UFS_VOLUME 0 #define G_LABEL_UFS_VOLUME 0
#define G_LABEL_UFS_ID 1 #define G_LABEL_UFS_ID 1
/*
* G_LABEL_UFS_CMP returns true if difference between provider mediasize
* and filesystem size is less than G_LABEL_UFS_MAXDIFF sectors
*/
#define G_LABEL_UFS_CMP(prov, fsys, size) \
( abs( ((fsys)->size) - ( (prov)->mediasize / (fsys)->fs_fsize )) \
< G_LABEL_UFS_MAXDIFF )
#define G_LABEL_UFS_MAXDIFF 0x100
static const int superblocks[] = SBLOCKSEARCH; static const int superblocks[] = SBLOCKSEARCH;
static void static void
g_label_ufs_taste_common(struct g_consumer *cp, char *label, size_t size, int what) g_label_ufs_taste_common(struct g_consumer *cp, char *label, size_t size, int what)
{ {
struct g_provider *pp; struct g_provider *pp;
int sb, superblock; int sb, superblock;
struct fs *fs; struct fs *fs;
Show All 21 Lines for (sb = 0; (superblock = superblocks[sb]) != -1; sb++) {
*/ */
if (superblock % cp->provider->sectorsize != 0) if (superblock % cp->provider->sectorsize != 0)
continue; continue;
fs = (struct fs *)g_read_data(cp, superblock, SBLOCKSIZE, NULL); fs = (struct fs *)g_read_data(cp, superblock, SBLOCKSIZE, NULL);
if (fs == NULL) if (fs == NULL)
continue; continue;
/* /*
* Check for magic. We also need to check if file system size is equal * Check for magic. We also need to check if file system size
* to providers size, because sysinstall(8) used to bogusly put first * is almost equal to providers size, because sysinstall(8)
* partition at offset 0 instead of 16, and glabel/ufs would find file * used to bogusly put first partition at offset 0
* system on slice instead of partition. * instead of 16, and glabel/ufs would find file system on slice
* instead of partition.
*
* In addition, media size can be a bit bigger than file system
* size. For instance, mkuzip can append bytes to align data
* to large sector size (it improves compression rates).
*/ */
switch (fs->fs_magic){
case FS_UFS1_MAGIC:
case FS_UFS2_MAGIC:
G_LABEL_DEBUG(1, "%s %s params: %jd, %d, %d, %jd\n",
fs->fs_magic == FS_UFS1_MAGIC ? "UFS1" : "UFS2",
pp->name, pp->mediasize, fs->fs_fsize,
fs->fs_old_size, fs->fs_providersize);
break;
default:
break;
}
if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_fsize > 0 && if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_fsize > 0 &&
((pp->mediasize / fs->fs_fsize == fs->fs_old_size) || ( G_LABEL_UFS_CMP(pp, fs, fs_old_size)
(pp->mediasize / fs->fs_fsize == fs->fs_providersize))) { || G_LABEL_UFS_CMP(pp, fs, fs_providersize))) {
/* Valid UFS1. */ /* Valid UFS1. */
} else if (fs->fs_magic == FS_UFS2_MAGIC && fs->fs_fsize > 0 && } else if (fs->fs_magic == FS_UFS2_MAGIC && fs->fs_fsize > 0 &&
((pp->mediasize / fs->fs_fsize == fs->fs_size) || ( G_LABEL_UFS_CMP(pp, fs, fs_size)
(pp->mediasize / fs->fs_fsize == fs->fs_providersize))) { || G_LABEL_UFS_CMP(pp, fs, fs_providersize))) {
/* Valid UFS2. */ /* Valid UFS2. */
} else { } else {
g_free(fs); g_free(fs);
continue; continue;
} }
if (fs->fs_sblockloc != superblock || fs->fs_ncg < 1 || if (fs->fs_sblockloc != superblock || fs->fs_ncg < 1 ||
fs->fs_bsize < MINBSIZE || fs->fs_bsize < MINBSIZE ||
fs->fs_bsize < sizeof(struct fs)) { fs->fs_bsize < sizeof(struct fs)) {
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