Merge pull request iovisor#1408 from afiskon/master

Explain possible reason of an error in scripts that rely on /proc/kallsyms (fixes iovisor#1391)
sjtuhjh · Oct 24, 2017 · ae194a1 · ae194a1
2 parents 648554d + 4a950bf
commit ae194a1
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diff --git a/tools/btrfsdist.py b/tools/btrfsdist.py
@@ -175,6 +175,7 @@
             break
     if ops == '':
         print("ERROR: no btrfs_file_operations in /proc/kallsyms. Exiting.")
+        print("HINT: the kernel should be built with CONFIG_KALLSYMS_ALL.")
         exit()
     bpf_text = bpf_text.replace('BTRFS_FILE_OPERATIONS', ops)
 bpf_text = bpf_text.replace('FACTOR', str(factor))

diff --git a/tools/btrfsslower.py b/tools/btrfsslower.py
@@ -268,6 +268,7 @@
             break
     if ops == '':
         print("ERROR: no btrfs_file_operations in /proc/kallsyms. Exiting.")
+        print("HINT: the kernel should be built with CONFIG_KALLSYMS_ALL.")
         exit()
     bpf_text = bpf_text.replace('BTRFS_FILE_OPERATIONS', ops)
 if min_ms == 0:

diff --git a/tools/ext4dist.py b/tools/ext4dist.py
@@ -155,6 +155,7 @@
             break
     if ops == '':
         print("ERROR: no ext4_file_operations in /proc/kallsyms. Exiting.")
+        print("HINT: the kernel should be built with CONFIG_KALLSYMS_ALL.")
         exit()
     bpf_text = bpf_text.replace('EXT4_FILE_OPERATIONS', ops)
 bpf_text = bpf_text.replace('FACTOR', str(factor))

diff --git a/tools/ext4slower.py b/tools/ext4slower.py
@@ -262,6 +262,7 @@
             break
     if ops == '':
         print("ERROR: no ext4_file_operations in /proc/kallsyms. Exiting.")
+        print("HINT: the kernel should be built with CONFIG_KALLSYMS_ALL.")
         exit()
     bpf_text = bpf_text.replace('EXT4_FILE_OPERATIONS', ops)
 if min_ms == 0: