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| author | Ingo Molnar <mingo@kernel.org> | 2015-10-14 17:05:18 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-10-14 17:05:18 +0300 |
| commit | c7d77a7980e434c3af17de19e3348157f9b9ccce (patch) | |
| tree | b32c5988ce8239b80c83e94c22d68f5eb0fb84da /tools/lib/api/fs/debugfs.c | |
| parent | 0ce423b6492a02be11662bfaa837dd16945aad3e (diff) | |
| parent | 8a53554e12e98d1759205afd7b8e9e2ea0936f48 (diff) | |
| download | linux-c7d77a7980e434c3af17de19e3348157f9b9ccce.tar.xz | |
Merge branch 'x86/urgent' into core/efi, to pick up a pending EFI fix
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'tools/lib/api/fs/debugfs.c')
| -rw-r--r-- | tools/lib/api/fs/debugfs.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/tools/lib/api/fs/debugfs.c b/tools/lib/api/fs/debugfs.c index 8305b3e9d48e..eb7cf4d18f8a 100644 --- a/tools/lib/api/fs/debugfs.c +++ b/tools/lib/api/fs/debugfs.c @@ -12,6 +12,7 @@ #include <linux/kernel.h> #include "debugfs.h" +#include "tracefs.h" #ifndef DEBUGFS_DEFAULT_PATH #define DEBUGFS_DEFAULT_PATH "/sys/kernel/debug" @@ -94,11 +95,21 @@ int debugfs__strerror_open(int err, char *buf, size_t size, const char *filename "Hint:\tIs the debugfs filesystem mounted?\n" "Hint:\tTry 'sudo mount -t debugfs nodev /sys/kernel/debug'"); break; - case EACCES: + case EACCES: { + const char *mountpoint = debugfs_mountpoint; + + if (!access(debugfs_mountpoint, R_OK) && strncmp(filename, "tracing/", 8) == 0) { + const char *tracefs_mntpoint = tracefs_find_mountpoint(); + + if (tracefs_mntpoint) + mountpoint = tracefs_mntpoint; + } + snprintf(buf, size, "Error:\tNo permissions to read %s/%s\n" "Hint:\tTry 'sudo mount -o remount,mode=755 %s'\n", - debugfs_mountpoint, filename, debugfs_mountpoint); + debugfs_mountpoint, filename, mountpoint); + } break; default: snprintf(buf, size, "%s", strerror_r(err, sbuf, sizeof(sbuf))); |