From: Alexey Dobriyan <adobriyan@xxxxxxxxx> Addresses http://bugzilla.kernel.org/show_bug.cgi?id=11321 ext4 creates per-suberblock directory in /proc/ext4/ . Name used as basis is taken from bdevname, which, surprise, can contain slash. However, proc while allowing to use proc_create("a/b", parent) form of PDE creation, assumes that parent/a was already created. bdevname in question is 'cciss/c0d0p9', directory is not created and all this stuff goes directly into /proc (which is real bug). Warning comes when _second_ partition is mounted. Signed-off-by: Alexey Dobriyan <adobriyan@xxxxxxxxx> Reported-by: Ralf Hildebrandt <ralf.hildebrandt@xxxxxxxxxx> Tested-by: Ralf Hildebrandt <ralf.hildebrandt@xxxxxxxxxx> Cc: Andreas Dilger <adilger@xxxxxxx> Cc: Theodore Ts'o <tytso@xxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- fs/ext4/mballoc.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff -puN fs/ext4/mballoc.c~ext4-fix-11321-create-proc-ext4-stats-et-al-more-carefully fs/ext4/mballoc.c --- a/fs/ext4/mballoc.c~ext4-fix-11321-create-proc-ext4-stats-et-al-more-carefully +++ a/fs/ext4/mballoc.c @@ -2792,6 +2792,15 @@ static int ext4_mb_init_per_dev_proc(str return -EINVAL; } bdevname(sb->s_bdev, devname); + { + char *p = devname; + + while (*p != '\0') { + if (*p == '/') + *p = '!'; + p++; + } + } sbi->s_mb_proc = proc_mkdir(devname, proc_root_ext4); MB_PROC_HANDLER(EXT4_MB_STATS_NAME, stats); _ -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
