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    SubjectRe: [PATCH] register_filesystem() must return -EEXIST if the filesystem with the same name is already registered
    Coywolf Qi Hunt wrote:
    > On Wed, Nov 02, 2005 at 02:42:12AM -0600, Hareesh Nagarajan wrote:
    >> If we have a look at the register_filesystem() function defined in
    >> fs/filesystems.c, we see that if a filesystem with a same name has
    >> already been registered then the find_filesystem() function will return
    >> NON-NULL otherwise it will return NULL.
    >> Hence, register_filesystem() should return EEXIST instead of EBUSY.
    >> Returning EBUSY is misleading (unless of course I'm missing something
    >> obvious) to the caller of register_filesystem().
    > This `slot' is buy, so EBUSY makes sense. Filesytem is not file, hence
    > EEXIST doesn't apply IMHO.

    Earlier this week, my calls to register_filesystem(struct
    file_system_type * fs) were failing returning an -EBUSY. Now I didn't
    know if it was failing because of:
    if (fs->next) return -EBUSY;
    p = find_filesystem(fs->name);
    if (*p) res = -EBUSY;
    return res;

    It is for this reason I thought it would make sense to differentiate
    between the two points of failure.

    Hareesh Nagarajan
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      Last update: 2005-11-02 18:40    [W:0.022 / U:10.164 seconds]
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