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This commit is contained in:
Andrea Mazzoleni 2026-04-27 15:43:06 +02:00
parent cfd1eac70c
commit cebc9b62f2
22 changed files with 1044 additions and 603 deletions
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66
cmdline/unix.c
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@ -964,8 +964,10 @@ int devuuid(uint64_t device_id, const char* device_path, char* uuid, size_t uuid
int filephy(const char* path, uint64_t size, uint64_t* physical)
{
#if HAVE_LINUX_FIEMAP_H
/* In Linux get the real physical address of the file */
/* Note that FIEMAP doesn't require root permission */
/*
* In Linux get the real physical address of the file
* Note that FIEMAP doesn't require root permission
*/
int f;
struct fiemap* fiemap;
size_t fiemap_size;
@ -976,8 +978,10 @@ int filephy(const char* path, uint64_t size, uint64_t* physical)
return -1;
}
/* first try with FIEMAP */
/* if works for ext2, ext3, ext4, xfs, btrfs */
/*
* First try with FIEMAP
* if works for ext2, ext3, ext4, xfs, btrfs
*/
fiemap_size = sizeof(struct fiemap) + sizeof(struct fiemap_extent);
fiemap = malloc_nofail(fiemap_size);
memset(fiemap, 0, fiemap_size);
@ -998,8 +1002,10 @@ int filephy(const char* path, uint64_t size, uint64_t* physical)
/* if the offset is unknown, we don't have an offset to report */
*physical = FILEPHY_WITHOUT_OFFSET;
} else if (offset == 0) {
/* 0 is the general fallback for file-systems when */
/* they don't have an offset to report */
/*
* 0 is the general fallback for file-systems when
* they don't have an offset to report
*/
*physical = FILEPHY_WITHOUT_OFFSET;
} else {
/* finally report the real offset */
@ -1023,9 +1029,11 @@ int filephy(const char* path, uint64_t size, uint64_t* physical)
return 0;
}
/* then try with FIBMAP */
/* it works for jfs, reiserfs, ntfs-3g */
/* in exfat it always returns 0, that it's anyway better than the fake inodes */
/*
* Then try with FIBMAP
* it works for jfs, reiserfs, ntfs-3g
* in exfat it always returns 0, that it's anyway better than the fake inodes
*/
blknum = 0; /* first block */
if (ioctl(f, FIBMAP, &blknum) != -1) {
*physical = blknum + FILEPHY_REAL_OFFSET;
@ -1034,22 +1042,26 @@ int filephy(const char* path, uint64_t size, uint64_t* physical)
return 0;
}
/* otherwise don't use anything, and keep the directory traversal order */
/* at now this should happen only for vfat */
/* and it's surely better than using fake inodes */
/*
* Otherwise don't use anything, and keep the directory traversal order
* at now this should happen only for vfat
* and it's surely better than using fake inodes
*/
*physical = FILEPHY_UNREPORTED_OFFSET;
if (close(f) == -1)
return -1;
#else
/* In a generic Unix use a dummy value for all the files */
/* We don't want to risk to use the inode without knowing */
/* if it really improves performance. */
/* In this way we keep them in the directory traversal order */
/* that at least keeps files in the same directory together. */
/* Note also that in newer file-system with snapshot, like ZFS, */
/* the inode doesn't represent even more the disk position, because files */
/* are not overwritten in place, but rewritten in another location */
/* of the disk. */
/*
* In a generic Unix use a dummy value for all the files
* We don't want to risk to use the inode without knowing
* if it really improves performance.
* In this way we keep them in the directory traversal order
* that at least keeps files in the same directory together.
* Note also that in newer file-system with snapshot, like ZFS,
* the inode doesn't represent even more the disk position, because files
* are not overwritten in place, but rewritten in another location
* of the disk.
*/
*physical = FILEPHY_UNREPORTED_OFFSET;
(void)path; /* not used here */
@ -1267,8 +1279,10 @@ int fsinfo(const char* path, int* has_persistent_inode, int* has_syncronized_har
return -1;
}
/* if it doesn't exist, we assume a file */
/* and we check for the containing dir */
/*
* If it doesn't exist, we assume a file
* and we check for the containing dir
*/
if (strlen(path) + 1 > sizeof(dir)) {
errno = ENAMETOOLONG;
return -1;
@ -1345,8 +1359,10 @@ int fsinfo(const char* path, int* has_persistent_inode, int* has_syncronized_har
/* get the filesystem type directly from the struct (Mac OS X) */
ptype = st.f_fstypename;
#elif HAVE_STATFS && HAVE_STRUCT_STATFS_F_TYPE
/* get the filesystem type from f_type (Linux) */
/* from: https://github.com/influxdata/gopsutil/blob/master/disk/disk_linux.go */
/*
* Get the filesystem type from f_type (Linux)
* from: https://github.com/influxdata/gopsutil/blob/master/disk/disk_linux.go
*/
for (int i = 0; FILESYSTEMS[i].id != 0; ++i) {
if (st.f_type == FILESYSTEMS[i].id) {
ptype = FILESYSTEMS[i].name;