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mount: adjust df stats reporting when close to the limit

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fix https://github.com/seaweedfs/seaweedfs/issues/3407
This commit is contained in:
chrislu 2022-08-05 00:31:41 -07:00
parent 4d08393b7c
commit b278bb24d3
1 changed files with 33 additions and 5 deletions
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38
weed/mount/weedfs_stats.go
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@ -10,7 +10,7 @@ import (
"time" "time"
) )
const blockSize = 512 const blockSize = 4096 * 4
type statsCache struct { type statsCache struct {
filer_pb.StatisticsResponse filer_pb.StatisticsResponse
@ -64,15 +64,43 @@ func (wfs *WFS) StatFs(cancel <-chan struct{}, in *fuse.InHeader, out *fuse.Stat
} }
} }
// http://man.he.net/man2/statfs
/*
struct statfs {
__fsword_t f_type; // Type of filesystem (see below)
__fsword_t f_bsize; // Optimal transfer block size
fsblkcnt_t f_blocks; // Total data blocks in filesystem
fsblkcnt_t f_bfree; // Free blocks in filesystem
fsblkcnt_t f_bavail; // Free blocks available to
unprivileged user
fsfilcnt_t f_files; // Total file nodes in filesystem
fsfilcnt_t f_ffree; // Free file nodes in filesystem
fsid_t f_fsid; // Filesystem ID
__fsword_t f_namelen; // Maximum length of filenames
__fsword_t f_frsize; // Fragment size (since Linux 2.6)
__fsword_t f_flags; // Mount flags of filesystem
(since Linux 2.6.36)
__fsword_t f_spare[xxx];
// Padding bytes reserved for future use
};
*/
// Compute the total number of available blocks // Compute the total number of available blocks
out.Blocks = totalDiskSize / blockSize out.Blocks = totalDiskSize / blockSize
if out.Blocks <= 0 {
out.Blocks = 1
}
// Compute the number of used blocks // Compute the number of used blocks
numBlocks := uint64(usedDiskSize / blockSize) numBlocks := usedDiskSize / blockSize
remainingBlocks := int64(out.Blocks) - int64(numBlocks)
if remainingBlocks < 0 {
remainingBlocks = 0
}
// Report the number of free and available blocks for the block size // Report the number of free and available blocks for the block size
out.Bfree = out.Blocks - numBlocks out.Bfree = uint64(remainingBlocks)
out.Bavail = out.Blocks - numBlocks out.Bavail = uint64(remainingBlocks)
out.Bsize = uint32(blockSize) out.Bsize = uint32(blockSize)
// Report the total number of possible files in the file system (and those free) // Report the total number of possible files in the file system (and those free)